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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-05 05:30:35 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-05 05:30:35 +0300 |
| commit | eff0cb3d91c06acbb957be1134a07afa2c4978e3 (patch) | |
| tree | 2e5722e5fe29172b7ff2ad7583ff5cf8deda9d31 /drivers/pci | |
| parent | 31be1d0fbd950395701d9fd47d8fb1f99c996f61 (diff) | |
| parent | c4f36c3ab065065a87d641ca2fd5d5c4eb2bfa82 (diff) | |
| download | linux-eff0cb3d91c06acbb957be1134a07afa2c4978e3.tar.xz | |
Merge tag 'pci-v5.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull pci updates from Bjorn Helgaas:
"Enumeration:
- Consolidate duplicated 'next function' scanning and extend to allow
'isolated functions' on s390, similar to existing hypervisors
(Niklas Schnelle)
Resource management:
- Implement pci_iobar_pfn() for sparc, which allows us to remove the
sparc-specific pci_mmap_page_range() and pci_mmap_resource_range().
This removes the ability to map the entire PCI I/O space using
/proc/bus/pci, but we believe that's already been broken since
v2.6.28 (Arnd Bergmann)
- Move common PCI definitions to asm-generic/pci.h and rework others
to be be more specific and more encapsulated in arches that need
them (Stafford Horne)
Power management:
- Convert drivers to new *_PM_OPS macros to avoid need for '#ifdef
CONFIG_PM_SLEEP' or '__maybe_unused' (Bjorn Helgaas)
Virtualization:
- Add ACS quirk for Broadcom BCM5750x multifunction NICs that isolate
the functions but don't advertise an ACS capability (Pavan Chebbi)
Error handling:
- Clear PCI Status register during enumeration in case firmware left
errors logged (Kai-Heng Feng)
- When we have native control of AER, enable error reporting for all
devices that support AER. Previously only a few drivers enabled
this (Stefan Roese)
- Keep AER error reporting enabled for switches. Previously we
enabled this during enumeration but immediately disabled it (Stefan
Roese)
- Iterate over error counters instead of error strings to avoid
printing junk in AER sysfs counters (Mohamed Khalfella)
ASPM:
- Remove pcie_aspm_pm_state_change() so ASPM config changes, e.g.,
via sysfs, are not lost across power state changes (Kai-Heng Feng)
Endpoint framework:
- Don't stop an EPC when unbinding an EPF from it (Shunsuke Mie)
Endpoint embedded DMA controller driver:
- Simplify and clean up support for the DesignWare embedded DMA
(eDMA) controller (Frank Li, Serge Semin)
Broadcom STB PCIe controller driver:
- Avoid config space accesses when link is down because we can't
recover from the CPU aborts these cause (Jim Quinlan)
- Look for power regulators described under Root Ports in DT and
enable them before scanning the secondary bus (Jim Quinlan)
- Disable/enable regulators in suspend/resume (Jim Quinlan)
Freescale i.MX6 PCIe controller driver:
- Simplify and clean up clock and PHY management (Richard Zhu)
- Disable/enable regulators in suspend/resume (Richard Zhu)
- Set PCIE_DBI_RO_WR_EN before writing DBI registers (Richard Zhu)
- Allow speeds faster than Gen2 (Richard Zhu)
- Make link being down a non-fatal error so controller probe doesn't
fail if there are no Endpoints connected (Richard Zhu)
Loongson PCIe controller driver:
- Add ACPI and MCFG support for Loongson LS7A (Huacai Chen)
- Avoid config reads to non-existent LS2K/LS7A devices because a
hardware defect causes machine hangs (Huacai Chen)
- Work around LS7A integrated devices that report incorrect Interrupt
Pin values (Jianmin Lv)
Marvell Aardvark PCIe controller driver:
- Add support for AER and Slot capability on emulated bridge (Pali
Rohár)
MediaTek PCIe controller driver:
- Add Airoha EN7532 to DT binding (John Crispin)
- Allow building of driver for ARCH_AIROHA (Felix Fietkau)
MediaTek PCIe Gen3 controller driver:
- Print decoded LTSSM state when the link doesn't come up (Jianjun
Wang)
NVIDIA Tegra194 PCIe controller driver:
- Convert DT binding to json-schema (Vidya Sagar)
- Add DT bindings and driver support for Tegra234 Root Port and
Endpoint mode (Vidya Sagar)
- Fix some Root Port interrupt handling issues (Vidya Sagar)
- Set default Max Payload Size to 256 bytes (Vidya Sagar)
- Fix Data Link Feature capability programming (Vidya Sagar)
- Extend Endpoint mode support to devices beyond Controller-5 (Vidya
Sagar)
Qualcomm PCIe controller driver:
- Rework clock, reset, PHY power-on ordering to avoid hangs and
improve consistency (Robert Marko, Christian Marangi)
- Move pipe_clk handling to PHY drivers (Dmitry Baryshkov)
- Add IPQ60xx support (Selvam Sathappan Periakaruppan)
- Allow ASPM L1 and substates for 2.7.0 (Krishna chaitanya chundru)
- Add support for more than 32 MSI interrupts (Dmitry Baryshkov)
Renesas R-Car PCIe controller driver:
- Convert DT binding to json-schema (Herve Codina)
- Add Renesas RZ/N1D (R9A06G032) to rcar-gen2 DT binding and driver
(Herve Codina)
Samsung Exynos PCIe controller driver:
- Fix phy-exynos-pcie driver so it follows the 'phy_init() before
phy_power_on()' PHY programming model (Marek Szyprowski)
Synopsys DesignWare PCIe controller driver:
- Simplify and clean up the DWC core extensively (Serge Semin)
- Fix an issue with programming the ATU for regions that cross a 4GB
boundary (Serge Semin)
- Enable the CDM check if 'snps,enable-cdm-check' exists; previously
we skipped it if 'num-lanes' was absent (Serge Semin)
- Allocate a 32-bit DMA-able page to be MSI target instead of using a
driver data structure that may not be addressable with 32-bit
address (Will McVicker)
- Add DWC core support for more than 32 MSI interrupts (Dmitry
Baryshkov)
Xilinx Versal CPM PCIe controller driver:
- Add DT binding and driver support for Versal CPM5 Gen5 Root Port
(Bharat Kumar Gogada)"
* tag 'pci-v5.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (150 commits)
PCI: imx6: Support more than Gen2 speed link mode
PCI: imx6: Set PCIE_DBI_RO_WR_EN before writing DBI registers
PCI: imx6: Reformat suspend callback to keep symmetric with resume
PCI: imx6: Move the imx6_pcie_ltssm_disable() earlier
PCI: imx6: Disable clocks in reverse order of enable
PCI: imx6: Do not hide PHY driver callbacks and refine the error handling
PCI: imx6: Reduce resume time by only starting link if it was up before suspend
PCI: imx6: Mark the link down as non-fatal error
PCI: imx6: Move regulator enable out of imx6_pcie_deassert_core_reset()
PCI: imx6: Turn off regulator when system is in suspend mode
PCI: imx6: Call host init function directly in resume
PCI: imx6: Disable i.MX6QDL clock when disabling ref clocks
PCI: imx6: Propagate .host_init() errors to caller
PCI: imx6: Collect clock enables in imx6_pcie_clk_enable()
PCI: imx6: Factor out ref clock disable to match enable
PCI: imx6: Move imx6_pcie_clk_disable() earlier
PCI: imx6: Move imx6_pcie_enable_ref_clk() earlier
PCI: imx6: Move PHY management functions together
PCI: imx6: Move imx6_pcie_grp_offset(), imx6_pcie_configure_type() earlier
PCI: imx6: Convert to NOIRQ_SYSTEM_SLEEP_PM_OPS()
...
Diffstat (limited to 'drivers/pci')
57 files changed, 2721 insertions, 1735 deletions
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index b8d96d38064d..d1c5fcf00a8a 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -237,7 +237,7 @@ config PCIE_ROCKCHIP_EP config PCIE_MEDIATEK tristate "MediaTek PCIe controller" - depends on ARCH_MEDIATEK || COMPILE_TEST + depends on ARCH_AIROHA || ARCH_MEDIATEK || COMPILE_TEST depends on OF depends on PCI_MSI_IRQ_DOMAIN help @@ -293,7 +293,7 @@ config PCI_HYPERV_INTERFACE config PCI_LOONGSON bool "LOONGSON PCI Controller" depends on MACH_LOONGSON64 || COMPILE_TEST - depends on OF + depends on OF || ACPI depends on PCI_QUIRKS default MACH_LOONGSON64 help diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c index 52767f26048f..13c4032ca379 100644 --- a/drivers/pci/controller/cadence/pcie-cadence.c +++ b/drivers/pci/controller/cadence/pcie-cadence.c @@ -243,7 +243,6 @@ err_phy: return ret; } -#ifdef CONFIG_PM_SLEEP static int cdns_pcie_suspend_noirq(struct device *dev) { struct cdns_pcie *pcie = dev_get_drvdata(dev); @@ -266,9 +265,8 @@ static int cdns_pcie_resume_noirq(struct device *dev) return 0; } -#endif const struct dev_pm_ops cdns_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq, - cdns_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq, + cdns_pcie_resume_noirq) }; diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c index dfcdeb432dc8..38462ed11d07 100644 --- a/drivers/pci/controller/dwc/pci-dra7xx.c +++ b/drivers/pci/controller/dwc/pci-dra7xx.c @@ -178,7 +178,7 @@ static void dra7xx_pcie_enable_interrupts(struct dra7xx_pcie *dra7xx) dra7xx_pcie_enable_msi_interrupts(dra7xx); } -static int dra7xx_pcie_host_init(struct pcie_port *pp) +static int dra7xx_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci); @@ -202,7 +202,7 @@ static const struct irq_domain_ops intx_domain_ops = { .xlate = pci_irqd_intx_xlate, }; -static int dra7xx_pcie_handle_msi(struct pcie_port *pp, int index) +static int dra7xx_pcie_handle_msi(struct dw_pcie_rp *pp, int index) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); unsigned long val; @@ -224,7 +224,7 @@ static int dra7xx_pcie_handle_msi(struct pcie_port *pp, int index) return 1; } -static void dra7xx_pcie_handle_msi_irq(struct pcie_port *pp) +static void dra7xx_pcie_handle_msi_irq(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); int ret, i, count, num_ctrls; @@ -255,8 +255,8 @@ static void dra7xx_pcie_msi_irq_handler(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); struct dra7xx_pcie *dra7xx; + struct dw_pcie_rp *pp; struct dw_pcie *pci; - struct pcie_port *pp; unsigned long reg; u32 bit; @@ -344,7 +344,7 @@ static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg) return IRQ_HANDLED; } -static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp) +static int dra7xx_pcie_init_irq_domain(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct device *dev = pci->dev; @@ -475,7 +475,7 @@ static int dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx, { int ret; struct dw_pcie *pci = dra7xx->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = pci->dev; pp->irq = platform_get_irq(pdev, 1); @@ -483,7 +483,7 @@ static int dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx, return pp->irq; /* MSI IRQ is muxed */ - pp->msi_irq = -ENODEV; + pp->msi_irq[0] = -ENODEV; ret = dra7xx_pcie_init_irq_domain(pp); if (ret < 0) @@ -862,7 +862,6 @@ err_link: return ret; } -#ifdef CONFIG_PM_SLEEP static int dra7xx_pcie_suspend(struct device *dev) { struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev); @@ -919,7 +918,6 @@ static int dra7xx_pcie_resume_noirq(struct device *dev) return 0; } -#endif static void dra7xx_pcie_shutdown(struct platform_device *pdev) { @@ -940,9 +938,9 @@ static void dra7xx_pcie_shutdown(struct platform_device *pdev) } static const struct dev_pm_ops dra7xx_pcie_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend, dra7xx_pcie_resume) - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend_noirq, - dra7xx_pcie_resume_noirq) + SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend, dra7xx_pcie_resume) + NOIRQ_SYSTEM_SLEEP_PM_OPS(dra7xx_pcie_suspend_noirq, + dra7xx_pcie_resume_noirq) }; static struct platform_driver dra7xx_pcie_driver = { diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c index 467c8d1cd7e4..ec5611005566 100644 --- a/drivers/pci/controller/dwc/pci-exynos.c +++ b/drivers/pci/controller/dwc/pci-exynos.c @@ -249,7 +249,7 @@ static int exynos_pcie_link_up(struct dw_pcie *pci) return (val & PCIE_ELBI_XMLH_LINKUP); } -static int exynos_pcie_host_init(struct pcie_port *pp) +static int exynos_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct exynos_pcie *ep = to_exynos_pcie(pci); @@ -258,9 +258,8 @@ static int exynos_pcie_host_init(struct pcie_port *pp) exynos_pcie_assert_core_reset(ep); - phy_reset(ep->phy); - phy_power_on(ep->phy); phy_init(ep->phy); + phy_power_on(ep->phy); exynos_pcie_deassert_core_reset(ep); exynos_pcie_enable_irq_pulse(ep); @@ -276,7 +275,7 @@ static int exynos_add_pcie_port(struct exynos_pcie *ep, struct platform_device *pdev) { struct dw_pcie *pci = &ep->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = &pdev->dev; int ret; @@ -292,7 +291,7 @@ static int exynos_add_pcie_port(struct exynos_pcie *ep, } pp->ops = &exynos_pcie_host_ops; - pp->msi_irq = -ENODEV; + pp->msi_irq[0] = -ENODEV; ret = dw_pcie_host_init(pp); if (ret) { @@ -390,7 +389,7 @@ static int __exit exynos_pcie_remove(struct platform_device *pdev) return 0; } -static int __maybe_unused exynos_pcie_suspend_noirq(struct device *dev) +static int exynos_pcie_suspend_noirq(struct device *dev) { struct exynos_pcie *ep = dev_get_drvdata(dev); @@ -402,11 +401,11 @@ static int __maybe_unused exynos_pcie_suspend_noirq(struct device *dev) return 0; } -static int __maybe_unused exynos_pcie_resume_noirq(struct device *dev) +static int exynos_pcie_resume_noirq(struct device *dev) { struct exynos_pcie *ep = dev_get_drvdata(dev); struct dw_pcie *pci = &ep->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; int ret; ret = regulator_bulk_enable(ARRAY_SIZE(ep->supplies), ep->supplies); @@ -421,8 +420,8 @@ static int __maybe_unused exynos_pcie_resume_noirq(struct device *dev) } static const struct dev_pm_ops exynos_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(exynos_pcie_suspend_noirq, - exynos_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(exynos_pcie_suspend_noirq, + exynos_pcie_resume_noirq) }; static const struct of_device_id exynos_pcie_of_match[] = { diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 7a285fb0f619..6e5debdbc55b 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -67,6 +67,7 @@ struct imx6_pcie { struct dw_pcie *pci; int reset_gpio; bool gpio_active_high; + bool link_is_up; struct clk *pcie_bus; struct clk *pcie_phy; struct clk *pcie_inbound_axi; @@ -146,6 +147,31 @@ struct imx6_pcie { #define PHY_RX_OVRD_IN_LO_RX_DATA_EN BIT(5) #define PHY_RX_OVRD_IN_LO_RX_PLL_EN BIT(3) +static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie) +{ + WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ && + imx6_pcie->drvdata->variant != IMX8MM); + return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14; +} + +static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie) +{ + unsigned int mask, val; + + if (imx6_pcie->drvdata->variant == IMX8MQ && + imx6_pcie->controller_id == 1) { + mask = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE; + val = FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, + PCI_EXP_TYPE_ROOT_PORT); + } else { + mask = IMX6Q_GPR12_DEVICE_TYPE; + val = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, + PCI_EXP_TYPE_ROOT_PORT); + } + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, mask, val); +} + static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, bool exp_val) { struct dw_pcie *pci = imx6_pcie->pci; @@ -271,6 +297,134 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, u16 data) return 0; } +static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie) +{ + switch (imx6_pcie->drvdata->variant) { + case IMX8MM: + /* + * The PHY initialization had been done in the PHY + * driver, break here directly. + */ + break; + case IMX8MQ: + /* + * TODO: Currently this code assumes external + * oscillator is being used + */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, + imx6_pcie_grp_offset(imx6_pcie), + IMX8MQ_GPR_PCIE_REF_USE_PAD, + IMX8MQ_GPR_PCIE_REF_USE_PAD); + /* + * Regarding the datasheet, the PCIE_VPH is suggested + * to be 1.8V. If the PCIE_VPH is supplied by 3.3V, the + * VREG_BYPASS should be cleared to zero. + */ + if (imx6_pcie->vph && + regulator_get_voltage(imx6_pcie->vph) > 3000000) + regmap_update_bits(imx6_pcie->iomuxc_gpr, + imx6_pcie_grp_offset(imx6_pcie), + IMX8MQ_GPR_PCIE_VREG_BYPASS, + 0); + break; + case IMX7D: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0); + break; + case IMX6SX: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6SX_GPR12_PCIE_RX_EQ_MASK, + IMX6SX_GPR12_PCIE_RX_EQ_2); + fallthrough; + default: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); + + /* configure constant input signal to the pcie ctrl and phy */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_LOS_LEVEL, 9 << 4); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN1, + imx6_pcie->tx_deemph_gen1 << 0); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, + imx6_pcie->tx_deemph_gen2_3p5db << 6); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, + imx6_pcie->tx_deemph_gen2_6db << 12); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_FULL, + imx6_pcie->tx_swing_full << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_LOW, + imx6_pcie->tx_swing_low << 25); + break; + } + + imx6_pcie_configure_type(imx6_pcie); +} + +static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) +{ + u32 val; + struct device *dev = imx6_pcie->pci->dev; + + if (regmap_read_poll_timeout(imx6_pcie->iomuxc_gpr, + IOMUXC_GPR22, val, + val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED, + PHY_PLL_LOCK_WAIT_USLEEP_MAX, + PHY_PLL_LOCK_WAIT_TIMEOUT)) + dev_err(dev, "PCIe PLL lock timeout\n"); +} + +static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie) +{ + unsigned long phy_rate = clk_get_rate(imx6_pcie->pcie_phy); + int mult, div; + u16 val; + + if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_PHY)) + return 0; + + switch (phy_rate) { + case 125000000: + /* + * The default settings of the MPLL are for a 125MHz input + * clock, so no need to reconfigure anything in that case. + */ + return 0; + case 100000000: + mult = 25; + div = 0; + break; + case 200000000: + mult = 25; + div = 1; + break; + default: + dev_err(imx6_pcie->pci->dev, + "Unsupported PHY reference clock rate %lu\n", phy_rate); + return -EINVAL; + } + + pcie_phy_read(imx6_pcie, PCIE_PHY_MPLL_OVRD_IN_LO, &val); + val &= ~(PCIE_PHY_MPLL_MULTIPLIER_MASK << + PCIE_PHY_MPLL_MULTIPLIER_SHIFT); + val |= mult << PCIE_PHY_MPLL_MULTIPLIER_SHIFT; + val |= PCIE_PHY_MPLL_MULTIPLIER_OVRD; + pcie_phy_write(imx6_pcie, PCIE_PHY_MPLL_OVRD_IN_LO, val); + + pcie_phy_read(imx6_pcie, PCIE_PHY_ATEOVRD, &val); + val &= ~(PCIE_PHY_ATEOVRD_REF_CLKDIV_MASK << + PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT); + val |= div << PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT; + val |= PCIE_PHY_ATEOVRD_EN; + pcie_phy_write(imx6_pcie, PCIE_PHY_ATEOVRD, val); + + return 0; +} + static void imx6_pcie_reset_phy(struct imx6_pcie *imx6_pcie) { u16 tmp; @@ -367,61 +521,6 @@ static int imx6_pcie_attach_pd(struct device *dev) return 0; } -static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) -{ - struct device *dev = imx6_pcie->pci->dev; - - switch (imx6_pcie->drvdata->variant) { - case IMX7D: - case IMX8MQ: - reset_control_assert(imx6_pcie->pciephy_reset); - fallthrough; - case IMX8MM: - reset_control_assert(imx6_pcie->apps_reset); - break; - case IMX6SX: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_TEST_POWERDOWN, - IMX6SX_GPR12_PCIE_TEST_POWERDOWN); - /* Force PCIe PHY reset */ - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, - IMX6SX_GPR5_PCIE_BTNRST_RESET, - IMX6SX_GPR5_PCIE_BTNRST_RESET); - break; - case IMX6QP: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, - IMX6Q_GPR1_PCIE_SW_RST, - IMX6Q_GPR1_PCIE_SW_RST); - break; - case IMX6Q: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, - IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, - IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); - break; - } - - if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { - int ret = regulator_disable(imx6_pcie->vpcie); - - if (ret) - dev_err(dev, "failed to disable vpcie regulator: %d\n", - ret); - } - - /* Some boards don't have PCIe reset GPIO. */ - if (gpio_is_valid(imx6_pcie->reset_gpio)) - gpio_set_value_cansleep(imx6_pcie->reset_gpio, - imx6_pcie->gpio_active_high); -} - -static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie) -{ - WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ && - imx6_pcie->drvdata->variant != IMX8MM); - return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14; -} - static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) { struct dw_pcie *pci = imx6_pcie->pci; @@ -482,38 +581,44 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) return ret; } -static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) +static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie) { - u32 val; - struct device *dev = imx6_pcie->pci->dev; - - if (regmap_read_poll_timeout(imx6_pcie->iomuxc_gpr, - IOMUXC_GPR22, val, - val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED, - PHY_PLL_LOCK_WAIT_USLEEP_MAX, - PHY_PLL_LOCK_WAIT_TIMEOUT)) - dev_err(dev, "PCIe PLL lock timeout\n"); + switch (imx6_pcie->drvdata->variant) { + case IMX6SX: + clk_disable_unprepare(imx6_pcie->pcie_inbound_axi); + break; + case IMX6QP: + case IMX6Q: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_REF_CLK_EN, 0); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_TEST_PD, + IMX6Q_GPR1_PCIE_TEST_PD); + break; + case IMX7D: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, + IMX7D_GPR12_PCIE_PHY_REFCLK_SEL); + break; + case IMX8MM: + case IMX8MQ: + clk_disable_unprepare(imx6_pcie->pcie_aux); + break; + default: + break; + } } -static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) +static int imx6_pcie_clk_enable(struct imx6_pcie *imx6_pcie) { struct dw_pcie *pci = imx6_pcie->pci; struct device *dev = pci->dev; int ret; - if (imx6_pcie->vpcie && !regulator_is_enabled(imx6_pcie->vpcie)) { - ret = regulator_enable(imx6_pcie->vpcie); - if (ret) { - dev_err(dev, "failed to enable vpcie regulator: %d\n", - ret); - return; - } - } - ret = clk_prepare_enable(imx6_pcie->pcie_phy); if (ret) { dev_err(dev, "unable to enable pcie_phy clock\n"); - goto err_pcie_phy; + return ret; } ret = clk_prepare_enable(imx6_pcie->pcie_bus); @@ -534,25 +639,75 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) goto err_ref_clk; } + /* allow the clocks to stabilize */ + usleep_range(200, 500); + return 0; + +err_ref_clk: + clk_disable_unprepare(imx6_pcie->pcie); +err_pcie: + clk_disable_unprepare(imx6_pcie->pcie_bus); +err_pcie_bus: + clk_disable_unprepare(imx6_pcie->pcie_phy); + + return ret; +} + +static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) +{ + imx6_pcie_disable_ref_clk(imx6_pcie); + clk_disable_unprepare(imx6_pcie->pcie); + clk_disable_unprepare(imx6_pcie->pcie_bus); + clk_disable_unprepare(imx6_pcie->pcie_phy); +} + +static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) +{ switch (imx6_pcie->drvdata->variant) { + case IMX7D: + case IMX8MQ: + reset_control_assert(imx6_pcie->pciephy_reset); + fallthrough; case IMX8MM: - if (phy_power_on(imx6_pcie->phy)) - dev_err(dev, "unable to power on PHY\n"); + reset_control_assert(imx6_pcie->apps_reset); break; - default: + case IMX6SX: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6SX_GPR12_PCIE_TEST_POWERDOWN, + IMX6SX_GPR12_PCIE_TEST_POWERDOWN); + /* Force PCIe PHY reset */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, + IMX6SX_GPR5_PCIE_BTNRST_RESET, + IMX6SX_GPR5_PCIE_BTNRST_RESET); + break; + case IMX6QP: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_SW_RST, + IMX6Q_GPR1_PCIE_SW_RST); + break; + case IMX6Q: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); break; } - /* allow the clocks to stabilize */ - usleep_range(200, 500); + + /* Some boards don't have PCIe reset GPIO. */ + if (gpio_is_valid(imx6_pcie->reset_gpio)) + gpio_set_value_cansleep(imx6_pcie->reset_gpio, + imx6_pcie->gpio_active_high); +} + +static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) +{ + struct dw_pcie *pci = imx6_pcie->pci; + struct device *dev = pci->dev; switch (imx6_pcie->drvdata->variant) { case IMX8MQ: reset_control_deassert(imx6_pcie->pciephy_reset); break; - case IMX8MM: - if (phy_init(imx6_pcie->phy)) - dev_err(dev, "waiting for phy ready timeout!\n"); - break; case IMX7D: reset_control_deassert(imx6_pcie->pciephy_reset); @@ -588,6 +743,7 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) usleep_range(200, 500); break; case IMX6Q: /* Nothing to do */ + case IMX8MM: break; } @@ -600,153 +756,6 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) msleep(100); } - return; - -err_ref_clk: - clk_disable_unprepare(imx6_pcie->pcie); -err_pcie: - clk_disable_unprepare(imx6_pcie->pcie_bus); -err_pcie_bus: - clk_disable_unprepare(imx6_pcie->pcie_phy); -err_pcie_phy: - if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { - ret = regulator_disable(imx6_pcie->vpcie); - if (ret) - dev_err(dev, "failed to disable vpcie regulator: %d\n", - ret); - } -} - -static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie) -{ - unsigned int mask, val; - - if (imx6_pcie->drvdata->variant == IMX8MQ && - imx6_pcie->controller_id == 1) { - mask = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE; - val = FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, - PCI_EXP_TYPE_ROOT_PORT); - } else { - mask = IMX6Q_GPR12_DEVICE_TYPE; - val = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, - PCI_EXP_TYPE_ROOT_PORT); - } - - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, mask, val); -} - -static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie) -{ - switch (imx6_pcie->drvdata->variant) { - case IMX8MM: - /* - * The PHY initialization had been done in the PHY - * driver, break here directly. - */ - break; - case IMX8MQ: - /* - * TODO: Currently this code assumes external - * oscillator is being used - */ - regmap_update_bits(imx6_pcie->iomuxc_gpr, - imx6_pcie_grp_offset(imx6_pcie), - IMX8MQ_GPR_PCIE_REF_USE_PAD, - IMX8MQ_GPR_PCIE_REF_USE_PAD); - /* - * Regarding the datasheet, the PCIE_VPH is suggested - * to be 1.8V. If the PCIE_VPH is supplied by 3.3V, the - * VREG_BYPASS should be cleared to zero. - */ - if (imx6_pcie->vph && - regulator_get_voltage(imx6_pcie->vph) > 3000000) - regmap_update_bits(imx6_pcie->iomuxc_gpr, - imx6_pcie_grp_offset(imx6_pcie), - IMX8MQ_GPR_PCIE_VREG_BYPASS, - 0); - break; - case IMX7D: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0); - break; - case IMX6SX: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_RX_EQ_MASK, - IMX6SX_GPR12_PCIE_RX_EQ_2); - fallthrough; - default: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); - - /* configure constant input signal to the pcie ctrl and phy */ - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_LOS_LEVEL, 9 << 4); - - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN1, - imx6_pcie->tx_deemph_gen1 << 0); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, - imx6_pcie->tx_deemph_gen2_3p5db << 6); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, - imx6_pcie->tx_deemph_gen2_6db << 12); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_SWING_FULL, - imx6_pcie->tx_swing_full << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_SWING_LOW, - imx6_pcie->tx_swing_low << 25); - break; - } - - imx6_pcie_configure_type(imx6_pcie); -} - -static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie) -{ - unsigned long phy_rate = clk_get_rate(imx6_pcie->pcie_phy); - int mult, div; - u16 val; - - if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_PHY)) - return 0; - - switch (phy_rate) { - case 125000000: - /* - * The default settings of the MPLL are for a 125MHz input - * clock, so no need to reconfigure anything in that case. - */ - return 0; - case 100000000: - mult = 25; - div = 0; - break; - case 200000000: - mult = 25; - div = 1; - break; - default: - dev_err(imx6_pcie->pci->dev, - "Unsupported PHY reference clock rate %lu\n", phy_rate); - return -EINVAL; - } - - pcie_phy_read(imx6_pcie, PCIE_PHY_MPLL_OVRD_IN_LO, &val); - val &= ~(PCIE_PHY_MPLL_MULTIPLIER_MASK << - PCIE_PHY_MPLL_MULTIPLIER_SHIFT); - val |= mult << PCIE_PHY_MPLL_MULTIPLIER_SHIFT; - val |= PCIE_PHY_MPLL_MULTIPLIER_OVRD; - pcie_phy_write(imx6_pcie, PCIE_PHY_MPLL_OVRD_IN_LO, val); - - pcie_phy_read(imx6_pcie, PCIE_PHY_ATEOVRD, &val); - val &= ~(PCIE_PHY_ATEOVRD_REF_CLKDIV_MASK << - PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT); - val |= div << PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT; - val |= PCIE_PHY_ATEOVRD_EN; - pcie_phy_write(imx6_pcie, PCIE_PHY_ATEOVRD, val); - return 0; } @@ -789,6 +798,25 @@ static void imx6_pcie_ltssm_enable(struct device *dev) } } +static void imx6_pcie_ltssm_disable(struct device *dev) +{ + struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev); + + switch (imx6_pcie->drvdata->variant) { + case IMX6Q: + case IMX6SX: + case IMX6QP: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 0); + break; + case IMX7D: + case IMX8MQ: + case IMX8MM: + reset_control_assert(imx6_pcie->apps_reset); + break; + } +} + static int imx6_pcie_start_link(struct dw_pcie *pci) { struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci); @@ -802,21 +830,26 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) * started in Gen2 mode, there is a possibility the devices on the * bus will not be detected at all. This happens with PCIe switches. */ + dw_pcie_dbi_ro_wr_en(pci); tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP); tmp &= ~PCI_EXP_LNKCAP_SLS; tmp |= PCI_EXP_LNKCAP_SLS_2_5GB; dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP, tmp); + dw_pcie_dbi_ro_wr_dis(pci); /* Start LTSSM. */ imx6_pcie_ltssm_enable(dev); - dw_pcie_wait_for_link(pci); + ret = dw_pcie_wait_for_link(pci); + if (ret) + goto err_reset_phy; - if (pci->link_gen == 2) { - /* Allow Gen2 mode after the link is up. */ + if (pci->link_gen > 1) { + /* Allow faster modes after the link is up */ + dw_pcie_dbi_ro_wr_en(pci); tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP); tmp &= ~PCI_EXP_LNKCAP_SLS; - tmp |= PCI_EXP_LNKCAP_SLS_5_0GB; + tmp |= pci->link_gen; dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP, tmp); /* @@ -826,6 +859,7 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) tmp = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL); tmp |= PORT_LOGIC_SPEED_CHANGE; dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, tmp); + dw_pcie_dbi_ro_wr_dis(pci); if (imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE) { @@ -846,34 +880,110 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) } /* Make sure link training is finished as well! */ - dw_pcie_wait_for_link(pci); + ret = dw_pcie_wait_for_link(pci); + if (ret) + goto err_reset_phy; } else { - dev_info(dev, "Link: Gen2 disabled\n"); + dev_info(dev, "Link: Only Gen1 is enabled\n"); } + imx6_pcie->link_is_up = true; tmp = dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKSTA); dev_info(dev, "Link up, Gen%i\n", tmp & PCI_EXP_LNKSTA_CLS); return 0; err_reset_phy: + imx6_pcie->link_is_up = false; dev_dbg(dev, "PHY DEBUG_R0=0x%08x DEBUG_R1=0x%08x\n", dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG0), dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG1)); imx6_pcie_reset_phy(imx6_pcie); - return ret; + return 0; +} + +static void imx6_pcie_stop_link(struct dw_pcie *pci) +{ + struct device *dev = pci->dev; + + /* Turn off PCIe LTSSM */ + imx6_pcie_ltssm_disable(dev); } -static int imx6_pcie_host_init(struct pcie_port *pp) +static int imx6_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct device *dev = pci->dev; struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci); + int ret; + + if (imx6_pcie->vpcie) { + ret = regulator_enable(imx6_pcie->vpcie); + if (ret) { + dev_err(dev, "failed to enable vpcie regulator: %d\n", + ret); + return ret; + } + } imx6_pcie_assert_core_reset(imx6_pcie); imx6_pcie_init_phy(imx6_pcie); - imx6_pcie_deassert_core_reset(imx6_pcie); + + ret = imx6_pcie_clk_enable(imx6_pcie); + if (ret) { + dev_err(dev, "unable to enable pcie clocks: %d\n", ret); + goto err_reg_disable; + } + + if (imx6_pcie->phy) { + ret = phy_power_on(imx6_pcie->phy); + if (ret) { + dev_err(dev, "pcie PHY power up failed\n"); + goto err_clk_disable; + } + } + + ret = imx6_pcie_deassert_core_reset(imx6_pcie); + if (ret < 0) { + dev_err(dev, "pcie deassert core reset failed: %d\n", ret); + goto err_phy_off; + } + + if (imx6_pcie->phy) { + ret = phy_init(imx6_pcie->phy); + if (ret) { + dev_err(dev, "waiting for PHY ready timeout!\n"); + goto err_phy_off; + } + } imx6_setup_phy_mpll(imx6_pcie); return 0; + +err_phy_off: + if (imx6_pcie->phy) + phy_power_off(imx6_pcie->phy); +err_clk_disable: + imx6_pcie_clk_disable(imx6_pcie); +err_reg_disable: + if (imx6_pcie->vpcie) + regulator_disable(imx6_pcie->vpcie); + return ret; +} + +static void imx6_pcie_host_exit(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci); + + if (imx6_pcie->phy) { + if (phy_power_off(imx6_pcie->phy)) + dev_err(pci->dev, "unable to power off PHY\n"); + phy_exit(imx6_pcie->phy); + } + imx6_pcie_clk_disable(imx6_pcie); + + if (imx6_pcie->vpcie) + regulator_disable(imx6_pcie->vpcie); } static const struct dw_pcie_host_ops imx6_pcie_host_ops = { @@ -884,26 +994,6 @@ static const struct dw_pcie_ops dw_pcie_ops = { .start_link = imx6_pcie_start_link, }; -#ifdef CONFIG_PM_SLEEP -static void imx6_pcie_ltssm_disable(struct device *dev) -{ - struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev); - - switch (imx6_pcie->drvdata->variant) { - case IMX6SX: - case IMX6QP: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 0); - break; - case IMX7D: - case IMX8MM: - reset_control_assert(imx6_pcie->apps_reset); - break; - default: - dev_err(dev, "ltssm_disable not supported\n"); - } -} - static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie) { struct device *dev = imx6_pcie->pci->dev; @@ -941,49 +1031,17 @@ pm_turnoff_sleep: usleep_range(1000, 10000); } -static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) -{ - clk_disable_unprepare(imx6_pcie->pcie); - clk_disable_unprepare(imx6_pcie->pcie_phy); - clk_disable_unprepare(imx6_pcie->pcie_bus); - - switch (imx6_pcie->drvdata->variant) { - case IMX6SX: - clk_disable_unprepare(imx6_pcie->pcie_inbound_axi); - break; - case IMX7D: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, - IMX7D_GPR12_PCIE_PHY_REFCLK_SEL); - break; - case IMX8MQ: - case IMX8MM: - clk_disable_unprepare(imx6_pcie->pcie_aux); - break; - default: - break; - } -} - static int imx6_pcie_suspend_noirq(struct device *dev) { struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev); + struct dw_pcie_rp *pp = &imx6_pcie->pci->pp; if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_SUPPORTS_SUSPEND)) return 0; imx6_pcie_pm_turnoff(imx6_pcie); - imx6_pcie_ltssm_disable(dev); - imx6_pcie_clk_disable(imx6_pcie); - switch (imx6_pcie->drvdata->variant) { - case IMX8MM: - if (phy_power_off(imx6_pcie->phy)) - dev_err(dev, "unable to power off PHY\n"); - phy_exit(imx6_pcie->phy); - break; - default: - break; - } + imx6_pcie_stop_link(imx6_pcie->pci); + imx6_pcie_host_exit(pp); return 0; } @@ -992,27 +1050,25 @@ static int imx6_pcie_resume_noirq(struct device *dev) { int ret; struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev); - struct pcie_port *pp = &imx6_pcie->pci->pp; + struct dw_pcie_rp *pp = &imx6_pcie->pci->pp; if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_SUPPORTS_SUSPEND)) return 0; - imx6_pcie_assert_core_reset(imx6_pcie); - imx6_pcie_init_phy(imx6_pcie); - imx6_pcie_deassert_core_reset(imx6_pcie); + ret = imx6_pcie_host_init(pp); + if (ret) + return ret; dw_pcie_setup_rc(pp); - ret = imx6_pcie_start_link(imx6_pcie->pci); - if (ret < 0) - dev_info(dev, "pcie link is down after resume.\n"); + if (imx6_pcie->link_is_up) + imx6_pcie_start_link(imx6_pcie->pci); return 0; } -#endif static const struct dev_pm_ops imx6_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(imx6_pcie_suspend_noirq, - imx6_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(imx6_pcie_suspend_noirq, + imx6_pcie_resume_noirq) }; static int imx6_pcie_probe(struct platform_device *pdev) @@ -1291,7 +1347,7 @@ static struct platform_driver imx6_pcie_driver = { static void imx6_pcie_quirk(struct pci_dev *dev) { struct pci_bus *bus = dev->bus; - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; /* Bus parent is the PCI bridge, its parent is this platform driver */ if (!bus->dev.parent || !bus->dev.parent->parent) diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index d10e5fd0f83c..78818853af9e 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -109,7 +109,7 @@ struct ks_pcie_of_data { enum dw_pcie_device_mode mode; const struct dw_pcie_host_ops *host_ops; const struct dw_pcie_ep_ops *ep_ops; - unsigned int version; + u32 version; }; struct keystone_pcie { @@ -147,7 +147,7 @@ static void ks_pcie_app_writel(struct keystone_pcie *ks_pcie, u32 offset, static void ks_pcie_msi_irq_ack(struct irq_data *data) { - struct pcie_port *pp = irq_data_get_irq_chip_data(data); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(data); struct keystone_pcie *ks_pcie; u32 irq = data->hwirq; struct dw_pcie *pci; @@ -167,7 +167,7 @@ static void ks_pcie_msi_irq_ack(struct irq_data *data) static void ks_pcie_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) { - struct pcie_port *pp = irq_data_get_irq_chip_data(data); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(data); struct keystone_pcie *ks_pcie; struct dw_pcie *pci; u64 msi_target; @@ -192,7 +192,7 @@ static int ks_pcie_msi_set_affinity(struct irq_data *irq_data, static void ks_pcie_msi_mask(struct irq_data *data) { - struct pcie_port *pp = irq_data_get_irq_chip_data(data); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(data); struct keystone_pcie *ks_pcie; u32 irq = data->hwirq; struct dw_pcie *pci; @@ -216,7 +216,7 @@ static void ks_pcie_msi_mask(struct irq_data *data) static void ks_pcie_msi_unmask(struct irq_data *data) { - struct pcie_port *pp = irq_data_get_irq_chip_data(data); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(data); struct keystone_pcie *ks_pcie; u32 irq = data->hwirq; struct dw_pcie *pci; @@ -247,7 +247,7 @@ static struct irq_chip ks_pcie_msi_irq_chip = { .irq_unmask = ks_pcie_msi_unmask, }; -static int ks_pcie_msi_host_init(struct pcie_port *pp) +static int ks_pcie_msi_host_init(struct dw_pcie_rp *pp) { pp->msi_irq_chip = &ks_pcie_msi_irq_chip; return dw_pcie_allocate_domains(pp); @@ -390,7 +390,7 @@ static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie) u32 val; u32 num_viewport = ks_pcie->num_viewport; struct dw_pcie *pci = ks_pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; u64 start, end; struct resource *mem; int i; @@ -428,7 +428,7 @@ static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie) static void __iomem *ks_pcie_other_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct keystone_pcie *ks_pcie = to_keystone_pcie(pci); u32 reg; @@ -456,7 +456,7 @@ static struct pci_ops ks_child_pcie_ops = { */ static int ks_pcie_v3_65_add_bus(struct pci_bus *bus) { - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct keystone_pcie *ks_pcie = to_keystone_pcie(pci); @@ -574,7 +574,7 @@ static void ks_pcie_msi_irq_handler(struct irq_desc *desc) struct keystone_pcie *ks_pcie = irq_desc_get_handler_data(desc); u32 offset = irq - ks_pcie->msi_host_irq; struct dw_pcie *pci = ks_pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = pci->dev; struct irq_chip *chip = irq_desc_get_chip(desc); u32 vector, reg, pos; @@ -799,7 +799,7 @@ static int __init ks_pcie_init_id(struct keystone_pcie *ks_pcie) return 0; } -static int __init ks_pcie_host_init(struct pcie_port *pp) +static int __init ks_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct keystone_pcie *ks_pcie = to_keystone_pcie(pci); @@ -1069,19 +1069,19 @@ static int ks_pcie_am654_set_mode(struct device *dev, static const struct ks_pcie_of_data ks_pcie_rc_of_data = { .host_ops = &ks_pcie_host_ops, - .version = 0x365A, + .version = DW_PCIE_VER_365A, }; static const struct ks_pcie_of_data ks_pcie_am654_rc_of_data = { .host_ops = &ks_pcie_am654_host_ops, .mode = DW_PCIE_RC_TYPE, - .version = 0x490A, + .version = DW_PCIE_VER_490A, }; static const struct ks_pcie_of_data ks_pcie_am654_ep_of_data = { .ep_ops = &ks_pcie_am654_ep_ops, .mode = DW_PCIE_EP_TYPE, - .version = 0x490A, + .version = DW_PCIE_VER_490A, }; static const struct of_device_id ks_pcie_of_match[] = { @@ -1114,12 +1114,12 @@ static int __init ks_pcie_probe(struct platform_device *pdev) struct device_link **link; struct gpio_desc *gpiod; struct resource *res; - unsigned int version; void __iomem *base; u32 num_viewport; struct phy **phy; u32 num_lanes; char name[10]; + u32 version; int ret; int irq; int i; @@ -1233,7 +1233,7 @@ static int __init ks_pcie_probe(struct platform_device *pdev) goto err_get_sync; } - if (pci->version >= 0x480A) + if (dw_pcie_ver_is_ge(pci, 480A)) ret = ks_pcie_am654_set_mode(dev, mode); else ret = ks_pcie_set_mode(dev); @@ -1324,7 +1324,7 @@ static struct platform_driver ks_pcie_driver __refdata = { .remove = __exit_p(ks_pcie_remove), .driver = { .name = "keystone-pcie", - .of_match_table = of_match_ptr(ks_pcie_of_match), + .of_match_table = ks_pcie_of_match, }, }; builtin_platform_driver(ks_pcie_driver); diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c index 39f4664bd84c..ad99707b3b99 100644 --- a/drivers/pci/controller/dwc/pci-layerscape-ep.c +++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c @@ -32,15 +32,6 @@ struct ls_pcie_ep { const struct ls_pcie_ep_drvdata *drvdata; }; -static int ls_pcie_establish_link(struct dw_pcie *pci) -{ - return 0; -} - -static const struct dw_pcie_ops dw_ls_pcie_ep_ops = { - .start_link = ls_pcie_establish_link, -}; - static const struct pci_epc_features* ls_pcie_ep_get_features(struct dw_pcie_ep *ep) { @@ -106,19 +97,16 @@ static const struct dw_pcie_ep_ops ls_pcie_ep_ops = { static const struct ls_pcie_ep_drvdata ls1_ep_drvdata = { .ops = &ls_pcie_ep_ops, - .dw_pcie_ops = &dw_ls_pcie_ep_ops, }; static const struct ls_pcie_ep_drvdata ls2_ep_drvdata = { .func_offset = 0x20000, .ops = &ls_pcie_ep_ops, - .dw_pcie_ops = &dw_ls_pcie_ep_ops, }; static const struct ls_pcie_ep_drvdata lx2_ep_drvdata = { .func_offset = 0x8000, .ops = &ls_pcie_ep_ops, - .dw_pcie_ops = &dw_ls_pcie_ep_ops, }; static const struct of_device_id ls_pcie_ep_of_match[] = { diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c index 6a4f0619bb1c..879b8692f96a 100644 --- a/drivers/pci/controller/dwc/pci-layerscape.c +++ b/drivers/pci/controller/dwc/pci-layerscape.c @@ -74,7 +74,7 @@ static void ls_pcie_fix_error_response(struct ls_pcie *pcie) iowrite32(PCIE_ABSERR_SETTING, pci->dbi_base + PCIE_ABSERR); } -static int ls_pcie_host_init(struct pcie_port *pp) +static int ls_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct ls_pcie *pcie = to_ls_pcie(pci); diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c index f44bf347904a..c1527693bed9 100644 --- a/drivers/pci/controller/dwc/pci-meson.c +++ b/drivers/pci/controller/dwc/pci-meson.c @@ -370,7 +370,7 @@ static int meson_pcie_link_up(struct dw_pcie *pci) return 0; } -static int meson_pcie_host_init(struct pcie_port *pp) +static int meson_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct meson_pcie *mp = to_meson_pcie(pci); diff --git a/drivers/pci/controller/dwc/pcie-al.c b/drivers/pci/controller/dwc/pcie-al.c index e8afa50129a8..b8cb77c9c4bd 100644 --- a/drivers/pci/controller/dwc/pcie-al.c +++ b/drivers/pci/controller/dwc/pcie-al.c @@ -217,7 +217,7 @@ static inline void al_pcie_target_bus_set(struct al_pcie *pcie, static void __iomem *al_pcie_conf_addr_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct al_pcie *pcie = to_al_pcie(to_dw_pcie_from_pp(pp)); unsigned int busnr = bus->number; struct al_pcie_target_bus_cfg *target_bus_cfg = &pcie->target_bus_cfg; @@ -245,7 +245,7 @@ static struct pci_ops al_child_pci_ops = { static void al_pcie_config_prepare(struct al_pcie *pcie) { struct al_pcie_target_bus_cfg *target_bus_cfg; - struct pcie_port *pp = &pcie->pci->pp; + struct dw_pcie_rp *pp = &pcie->pci->pp; unsigned int ecam_bus_mask; u32 cfg_control_offset; u8 subordinate_bus; @@ -289,7 +289,7 @@ static void al_pcie_config_prepare(struct al_pcie *pcie) al_pcie_controller_writel(pcie, cfg_control_offset, reg); } -static int al_pcie_host_init(struct pcie_port *pp) +static int al_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct al_pcie *pcie = to_al_pcie(pci); diff --git a/drivers/pci/controller/dwc/pcie-armada8k.c b/drivers/pci/controller/dwc/pcie-armada8k.c index 4e2552dcf982..dc469ef8e99b 100644 --- a/drivers/pci/controller/dwc/pcie-armada8k.c +++ b/drivers/pci/controller/dwc/pcie-armada8k.c @@ -166,7 +166,7 @@ static int armada8k_pcie_start_link(struct dw_pcie *pci) return 0; } -static int armada8k_pcie_host_init(struct pcie_port *pp) +static int armada8k_pcie_host_init(struct dw_pcie_rp *pp) { u32 reg; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); @@ -233,7 +233,7 @@ static int armada8k_add_pcie_port(struct armada8k_pcie *pcie, struct platform_device *pdev) { struct dw_pcie *pci = pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = &pdev->dev; int ret; @@ -343,7 +343,7 @@ static struct platform_driver armada8k_pcie_driver = { .probe = armada8k_pcie_probe, .driver = { .name = "armada8k-pcie", - .of_match_table = of_match_ptr(armada8k_pcie_of_match), + .of_match_table = armada8k_pcie_of_match, .suppress_bind_attrs = true, }, }; diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c index 2f15441770e1..98102079e26d 100644 --- a/drivers/pci/controller/dwc/pcie-artpec6.c +++ b/drivers/pci/controller/dwc/pcie-artpec6.c @@ -97,7 +97,7 @@ static void artpec6_pcie_writel(struct artpec6_pcie *artpec6_pcie, u32 offset, u static u64 artpec6_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr) { struct artpec6_pcie *artpec6_pcie = to_artpec6_pcie(pci); - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct dw_pcie_ep *ep = &pci->ep; switch (artpec6_pcie->mode) { @@ -315,7 +315,7 @@ static void artpec6_pcie_deassert_core_reset(struct artpec6_pcie *artpec6_pcie) usleep_range(100, 200); } -static int artpec6_pcie_host_init(struct pcie_port *pp) +static int artpec6_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct artpec6_pcie *artpec6_pcie = to_artpec6_pcie(pci); diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 0eda8236c125..cf1627679716 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -154,9 +154,8 @@ static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no, return 0; } -static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, - enum pci_barno bar, dma_addr_t cpu_addr, - enum dw_pcie_as_type as_type) +static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, int type, + dma_addr_t cpu_addr, enum pci_barno bar) { int ret; u32 free_win; @@ -168,8 +167,8 @@ static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, return -EINVAL; } - ret = dw_pcie_prog_inbound_atu(pci, func_no, free_win, bar, cpu_addr, - as_type); + ret = dw_pcie_prog_inbound_atu(pci, func_no, free_win, type, + cpu_addr, bar); if (ret < 0) { dev_err(pci->dev, "Failed to program IB window\n"); return ret; @@ -185,8 +184,9 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no, phys_addr_t phys_addr, u64 pci_addr, size_t size) { - u32 free_win; struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + u32 free_win; + int ret; free_win = find_first_zero_bit(ep->ob_window_map, pci->num_ob_windows); if (free_win >= pci->num_ob_windows) { @@ -194,8 +194,10 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no, return -EINVAL; } - dw_pcie_prog_ep_outbound_atu(pci, func_no, free_win, PCIE_ATU_TYPE_MEM, - phys_addr, pci_addr, size); + ret = dw_pcie_prog_ep_outbound_atu(pci, func_no, free_win, PCIE_ATU_TYPE_MEM, + phys_addr, pci_addr, size); + if (ret) + return ret; set_bit(free_win, ep->ob_window_map); ep->outbound_addr[free_win] = phys_addr; @@ -213,7 +215,7 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, __dw_pcie_ep_reset_bar(pci, func_no, bar, epf_bar->flags); - dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND); + dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_IB, atu_index); clear_bit(atu_index, ep->ib_window_map); ep->epf_bar[bar] = NULL; } @@ -221,27 +223,25 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_bar *epf_bar) { - int ret; struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); enum pci_barno bar = epf_bar->barno; size_t size = epf_bar->size; int flags = epf_bar->flags; - enum dw_pcie_as_type as_type; - u32 reg; unsigned int func_offset = 0; + int ret, type; + u32 reg; func_offset = dw_pcie_ep_func_select(ep, func_no); reg = PCI_BASE_ADDRESS_0 + (4 * bar) + func_offset; if (!(flags & PCI_BASE_ADDRESS_SPACE)) - as_type = DW_PCIE_AS_MEM; + type = PCIE_ATU_TYPE_MEM; else - as_type = DW_PCIE_AS_IO; + type = PCIE_ATU_TYPE_IO; - ret = dw_pcie_ep_inbound_atu(ep, func_no, bar, - epf_bar->phys_addr, as_type); + ret = dw_pcie_ep_inbound_atu(ep, func_no, type, epf_bar->phys_addr, bar); if (ret) return ret; @@ -289,7 +289,7 @@ static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, if (ret < 0) return; - dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_OUTBOUND); + dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_OB, atu_index); clear_bit(atu_index, ep->ob_window_map); } @@ -435,8 +435,7 @@ static void dw_pcie_ep_stop(struct pci_epc *epc) struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - if (pci->ops && pci->ops->stop_link) - pci->ops->stop_link(pci); + dw_pcie_stop_link(pci); } static int dw_pcie_ep_start(struct pci_epc *epc) @@ -444,10 +443,7 @@ static int dw_pcie_ep_start(struct pci_epc *epc) struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - if (!pci->ops || !pci->ops->start_link) - return -EINVAL; - - return pci->ops->start_link(pci); + return dw_pcie_start_link(pci); } static const struct pci_epc_features* @@ -699,17 +695,15 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) if (!pci->dbi_base2) { res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi2"); - if (!res) + if (!res) { pci->dbi_base2 = pci->dbi_base + SZ_4K; - else { + } else { pci->dbi_base2 = devm_pci_remap_cfg_resource(dev, res); if (IS_ERR(pci->dbi_base2)) return PTR_ERR(pci->dbi_base2); } } - dw_pcie_iatu_detect(pci); - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space"); if (!res) return -EINVAL; @@ -717,17 +711,17 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) ep->phys_base = res->start; ep->addr_size = resource_size(res); - ep->ib_window_map = devm_kcalloc(dev, - BITS_TO_LONGS(pci->num_ib_windows), - sizeof(long), - GFP_KERNEL); + dw_pcie_version_detect(pci); + + dw_pcie_iatu_detect(pci); + + ep->ib_window_map = devm_bitmap_zalloc(dev, pci->num_ib_windows, + GFP_KERNEL); if (!ep->ib_window_map) return -ENOMEM; - ep->ob_window_map = devm_kcalloc(dev, - BITS_TO_LONGS(pci->num_ob_windows), - sizeof(long), - GFP_KERNEL); + ep->ob_window_map = devm_bitmap_zalloc(dev, pci->num_ob_windows, + GFP_KERNEL); if (!ep->ob_window_map) return -ENOMEM; @@ -780,8 +774,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys, epc->mem->window.page_size); if (!ep->msi_mem) { + ret = -ENOMEM; dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n"); - return -ENOMEM; + goto err_exit_epc_mem; } if (ep->ops->get_features) { @@ -790,6 +785,19 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) return 0; } - return dw_pcie_ep_init_complete(ep); + ret = dw_pcie_ep_init_complete(ep); + if (ret) + goto err_free_epc_mem; + + return 0; + +err_free_epc_mem: + pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem, + epc->mem->window.page_size); + +err_exit_epc_mem: + pci_epc_mem_exit(epc); + + return ret; } EXPORT_SYMBOL_GPL(dw_pcie_ep_init); diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 9979302532b7..7746f94a715f 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -53,7 +53,7 @@ static struct msi_domain_info dw_pcie_msi_domain_info = { }; /* MSI int handler */ -irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) +irqreturn_t dw_handle_msi_irq(struct dw_pcie_rp *pp) { int i, pos; unsigned long val; @@ -88,7 +88,7 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) static void dw_chained_msi_isr(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); - struct pcie_port *pp; + struct dw_pcie_rp *pp; chained_irq_enter(chip, desc); @@ -100,7 +100,7 @@ static void dw_chained_msi_isr(struct irq_desc *desc) static void dw_pci_setup_msi_msg(struct irq_data *d, struct msi_msg *msg) { - struct pcie_port *pp = irq_data_get_irq_chip_data(d); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); u64 msi_target; @@ -123,7 +123,7 @@ static int dw_pci_msi_set_affinity(struct irq_data *d, static void dw_pci_bottom_mask(struct irq_data *d) { - struct pcie_port *pp = irq_data_get_irq_chip_data(d); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); unsigned int res, bit, ctrl; unsigned long flags; @@ -142,7 +142,7 @@ static void dw_pci_bottom_mask(struct irq_data *d) static void dw_pci_bottom_unmask(struct irq_data *d) { - struct pcie_port *pp = irq_data_get_irq_chip_data(d); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); unsigned int res, bit, ctrl; unsigned long flags; @@ -161,7 +161,7 @@ static void dw_pci_bottom_unmask(struct irq_data *d) static void dw_pci_bottom_ack(struct irq_data *d) { - struct pcie_port *pp = irq_data_get_irq_chip_data(d); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); unsigned int res, bit, ctrl; @@ -185,7 +185,7 @@ static int dw_pcie_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs, void *args) { - struct pcie_port *pp = domain->host_data; + struct dw_pcie_rp *pp = domain->host_data; unsigned long flags; u32 i; int bit; @@ -213,7 +213,7 @@ static void dw_pcie_irq_domain_free(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs) { struct irq_data *d = irq_domain_get_irq_data(domain, virq); - struct pcie_port *pp = domain->host_data; + struct dw_pcie_rp *pp = domain->host_data; unsigned long flags; raw_spin_lock_irqsave(&pp->lock, flags); @@ -229,7 +229,7 @@ static const struct irq_domain_ops dw_pcie_msi_domain_ops = { .free = dw_pcie_irq_domain_free, }; -int dw_pcie_allocate_domains(struct pcie_port *pp) +int dw_pcie_allocate_domains(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct fwnode_handle *fwnode = of_node_to_fwnode(pci->dev->of_node); @@ -255,10 +255,15 @@ int dw_pcie_allocate_domains(struct pcie_port *pp) return 0; } -static void dw_pcie_free_msi(struct pcie_port *pp) +static void dw_pcie_free_msi(struct dw_pcie_rp *pp) { - if (pp->msi_irq) - irq_set_chained_handler_and_data(pp->msi_irq, NULL, NULL); + u32 ctrl; + + for (ctrl = 0; ctrl < MAX_MSI_CTRLS; ctrl++) { + if (pp->msi_irq[ctrl] > 0) + irq_set_chained_handler_and_data(pp->msi_irq[ctrl], + NULL, NULL); + } irq_domain_remove(pp->msi_domain); irq_domain_remove(pp->irq_domain); @@ -267,12 +272,13 @@ static void dw_pcie_free_msi(struct pcie_port *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct device *dev = pci->dev; - dma_unmap_single_attrs(dev, pp->msi_data, sizeof(pp->msi_msg), - DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_page(dev, pp->msi_data, PAGE_SIZE, DMA_FROM_DEVICE); + if (pp->msi_page) + __free_page(pp->msi_page); } } -static void dw_pcie_msi_init(struct pcie_port *pp) +static void dw_pcie_msi_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); u64 msi_target = (u64)pp->msi_data; @@ -285,7 +291,112 @@ static void dw_pcie_msi_init(struct pcie_port *pp) dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_HI, upper_32_bits(msi_target)); } -int dw_pcie_host_init(struct pcie_port *pp) +static int dw_pcie_parse_split_msi_irq(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct device *dev = pci->dev; + struct platform_device *pdev = to_platform_device(dev); + u32 ctrl, max_vectors; + int irq; + + /* Parse any "msiX" IRQs described in the devicetree */ + for (ctrl = 0; ctrl < MAX_MSI_CTRLS; ctrl++) { + char msi_name[] = "msiX"; + + msi_name[3] = '0' + ctrl; + irq = platform_get_irq_byname_optional(pdev, msi_name); + if (irq == -ENXIO) + break; + if (irq < 0) + return dev_err_probe(dev, irq, + "Failed to parse MSI IRQ '%s'\n", + msi_name); + + pp->msi_irq[ctrl] = irq; + } + + /* If no "msiX" IRQs, caller should fallback to "msi" IRQ */ + if (ctrl == 0) + return -ENXIO; + + max_vectors = ctrl * MAX_MSI_IRQS_PER_CTRL; + if (pp->num_vectors > max_vectors) { + dev_warn(dev, "Exceeding number of MSI vectors, limiting to %u\n", + max_vectors); + pp->num_vectors = max_vectors; + } + if (!pp->num_vectors) + pp->num_vectors = max_vectors; + + return 0; +} + +static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct device *dev = pci->dev; + struct platform_device *pdev = to_platform_device(dev); + int ret; + u32 ctrl, num_ctrls; + + for (ctrl = 0; ctrl < MAX_MSI_CTRLS; ctrl++) + pp->irq_mask[ctrl] = ~0; + + if (!pp->msi_irq[0]) { + ret = dw_pcie_parse_split_msi_irq(pp); + if (ret < 0 && ret != -ENXIO) + return ret; + } + + if (!pp->num_vectors) + pp->num_vectors = MSI_DEF_NUM_VECTORS; + num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; + + if (!pp->msi_irq[0]) { + pp->msi_irq[0] = platform_get_irq_byname_optional(pdev, "msi"); + if (pp->msi_irq[0] < 0) { + pp->msi_irq[0] = platform_get_irq(pdev, 0); + if (pp->msi_irq[0] < 0) + return pp->msi_irq[0]; + } + } + + dev_dbg(dev, "Using %d MSI vectors\n", pp->num_vectors); + + pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip; + + ret = dw_pcie_allocate_domains(pp); + if (ret) + return ret; + + for (ctrl = 0; ctrl < num_ctrls; ctrl++) { + if (pp->msi_irq[ctrl] > 0) + irq_set_chained_handler_and_data(pp->msi_irq[ctrl], + dw_chained_msi_isr, pp); + } + + ret = dma_set_mask(dev, DMA_BIT_MASK(32)); + if (ret) + dev_warn(dev, "Failed to set DMA mask to 32-bit. Devices with only 32-bit MSI support may not work properly\n"); + + pp->msi_page = alloc_page(GFP_DMA32); + pp->msi_data = dma_map_page(dev, pp->msi_page, 0, + PAGE_SIZE, DMA_FROM_DEVICE); + ret = dma_mapping_error(dev, pp->msi_data); + if (ret) { + dev_err(pci->dev, "Failed to map MSI data\n"); + __free_page(pp->msi_page); + pp->msi_page = NULL; + pp->msi_data = 0; + dw_pcie_free_msi(pp); + + return ret; + } + + return 0; +} + +int dw_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct device *dev = pci->dev; @@ -293,17 +404,17 @@ int dw_pcie_host_init(struct pcie_port *pp) struct platform_device *pdev = to_platform_device(dev); struct resource_entry *win; struct pci_host_bridge *bridge; - struct resource *cfg_res; + struct resource *res; int ret; - raw_spin_lock_init(&pci->pp.lock); + raw_spin_lock_init(&pp->lock); - cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); - if (cfg_res) { - pp->cfg0_size = resource_size(cfg_res); - pp->cfg0_base = cfg_res->start; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); + if (res) { + pp->cfg0_size = resource_size(res); + pp->cfg0_base = res->start; - pp->va_cfg0_base = devm_pci_remap_cfg_resource(dev, cfg_res); + pp->va_cfg0_base = devm_pci_remap_cfg_resource(dev, res); if (IS_ERR(pp->va_cfg0_base)) return PTR_ERR(pp->va_cfg0_base); } else { @@ -312,8 +423,8 @@ int dw_pcie_host_init(struct pcie_port *pp) } if (!pci->dbi_base) { - struct resource *dbi_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi"); - pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_res); + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi"); + pci->dbi_base = devm_pci_remap_cfg_resource(dev, res); if (IS_ERR(pci->dbi_base)) return PTR_ERR(pci->dbi_base); } @@ -350,67 +461,39 @@ int dw_pcie_host_init(struct pcie_port *pp) of_property_read_bool(np, "msi-parent") || of_property_read_bool(np, "msi-map")); - if (!pp->num_vectors) { + /* + * For the has_msi_ctrl case the default assignment is handled + * in the dw_pcie_msi_host_init(). + */ + if (!pp->has_msi_ctrl && !pp->num_vectors) { pp->num_vectors = MSI_DEF_NUM_VECTORS; } else if (pp->num_vectors > MAX_MSI_IRQS) { dev_err(dev, "Invalid number of vectors\n"); - return -EINVAL; + ret = -EINVAL; + goto err_deinit_host; } if (pp->ops->msi_host_init) { ret = pp->ops->msi_host_init(pp); if (ret < 0) - return ret; + goto err_deinit_host; } else if (pp->has_msi_ctrl) { - u32 ctrl, num_ctrls; - - num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; - for (ctrl = 0; ctrl < num_ctrls; ctrl++) - pp->irq_mask[ctrl] = ~0; - - if (!pp->msi_irq) { - pp->msi_irq = platform_get_irq_byname_optional(pdev, "msi"); - if (pp->msi_irq < 0) { - pp->msi_irq = platform_get_irq(pdev, 0); - if (pp->msi_irq < 0) - return pp->msi_irq; - } - } - - pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip; - - ret = dw_pcie_allocate_domains(pp); - if (ret) - return ret; - - if (pp->msi_irq > 0) - irq_set_chained_handler_and_data(pp->msi_irq, - dw_chained_msi_isr, - pp); - - ret = dma_set_mask(pci->dev, DMA_BIT_MASK(32)); - if (ret) - dev_warn(pci->dev, "Failed to set DMA mask to 32-bit. Devices with only 32-bit MSI support may not work properly\n"); - - pp->msi_data = dma_map_single_attrs(pci->dev, &pp->msi_msg, - sizeof(pp->msi_msg), - DMA_FROM_DEVICE, - DMA_ATTR_SKIP_CPU_SYNC); - ret = dma_mapping_error(pci->dev, pp->msi_data); - if (ret) { - dev_err(pci->dev, "Failed to map MSI data\n"); - pp->msi_data = 0; - goto err_free_msi; - } + ret = dw_pcie_msi_host_init(pp); + if (ret < 0) + goto err_deinit_host; } } + dw_pcie_version_detect(pci); + dw_pcie_iatu_detect(pci); - dw_pcie_setup_rc(pp); + ret = dw_pcie_setup_rc(pp); + if (ret) + goto err_free_msi; - if (!dw_pcie_link_up(pci) && pci->ops && pci->ops->start_link) { - ret = pci->ops->start_link(pci); + if (!dw_pcie_link_up(pci)) { + ret = dw_pcie_start_link(pci); if (ret) goto err_free_msi; } @@ -421,32 +504,50 @@ int dw_pcie_host_init(struct pcie_port *pp) bridge->sysdata = pp; ret = pci_host_probe(bridge); - if (!ret) - return 0; + if (ret) + goto err_stop_link; + + return 0; + +err_stop_link: + dw_pcie_stop_link(pci); err_free_msi: if (pp->has_msi_ctrl) dw_pcie_free_msi(pp); + +err_deinit_host: + if (pp->ops->host_deinit) + pp->ops->host_deinit(pp); + return ret; } EXPORT_SYMBOL_GPL(dw_pcie_host_init); -void dw_pcie_host_deinit(struct pcie_port *pp) +void dw_pcie_host_deinit(struct dw_pcie_rp *pp) { + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + pci_stop_root_bus(pp->bridge->bus); pci_remove_root_bus(pp->bridge->bus); + + dw_pcie_stop_link(pci); + if (pp->has_msi_ctrl) dw_pcie_free_msi(pp); + + if (pp->ops->host_deinit) + pp->ops->host_deinit(pp); } EXPORT_SYMBOL_GPL(dw_pcie_host_deinit); static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { - int type; - u32 busdev; - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + int type, ret; + u32 busdev; /* * Checking whether the link is up here is a last line of defense @@ -467,8 +568,10 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, else type = PCIE_ATU_TYPE_CFG1; - - dw_pcie_prog_outbound_atu(pci, 0, type, pp->cfg0_base, busdev, pp->cfg0_size); + ret = dw_pcie_prog_outbound_atu(pci, 0, type, pp->cfg0_base, busdev, + pp->cfg0_size); + if (ret) + return NULL; return pp->va_cfg0_base + where; } @@ -476,33 +579,45 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val) { - int ret; - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + int ret; ret = pci_generic_config_read(bus, devfn, where, size, val); + if (ret != PCIBIOS_SUCCESSFUL) + return ret; - if (!ret && pci->io_cfg_atu_shared) - dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, pp->io_base, - pp->io_bus_addr, pp->io_size); + if (pp->cfg0_io_shared) { + ret = dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, + pp->io_base, pp->io_bus_addr, + pp->io_size); + if (ret) + return PCIBIOS_SET_FAILED; + } - return ret; + return PCIBIOS_SUCCESSFUL; } static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) { - int ret; - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + int ret; ret = pci_generic_config_write(bus, devfn, where, size, val); + if (ret != PCIBIOS_SUCCESSFUL) + return ret; - if (!ret && pci->io_cfg_atu_shared) - dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, pp->io_base, - pp->io_bus_addr, pp->io_size); + if (pp->cfg0_io_shared) { + ret = dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, + pp->io_base, pp->io_bus_addr, + pp->io_size); + if (ret) + return PCIBIOS_SET_FAILED; + } - return ret; + return PCIBIOS_SUCCESSFUL; } static struct pci_ops dw_child_pcie_ops = { @@ -513,7 +628,7 @@ static struct pci_ops dw_child_pcie_ops = { void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { - struct pcie_port *pp = bus->sysdata; + struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); if (PCI_SLOT(devfn) > 0) @@ -529,11 +644,72 @@ static struct pci_ops dw_pcie_ops = { .write = pci_generic_config_write, }; -void dw_pcie_setup_rc(struct pcie_port *pp) +static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) { - int i; - u32 val, ctrl, num_ctrls; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct resource_entry *entry; + int i, ret; + + /* Note the very first outbound ATU is used for CFG IOs */ + if (!pci->num_ob_windows) { + dev_err(pci->dev, "No outbound iATU found\n"); + return -EINVAL; + } + + /* + * Ensure all outbound windows are disabled before proceeding with + * the MEM/IO ranges setups. + */ + for (i = 0; i < pci->num_ob_windows; i++) + dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_OB, i); + + i = 0; + resource_list_for_each_entry(entry, &pp->bridge->windows) { + if (resource_type(entry->res) != IORESOURCE_MEM) + continue; + + if (pci->num_ob_windows <= ++i) + break; + + ret = dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_MEM, + entry->res->start, + entry->res->start - entry->offset, + resource_size(entry->res)); + if (ret) { + dev_err(pci->dev, "Failed to set MEM range %pr\n", + entry->res); + return ret; + } + } + + if (pp->io_size) { + if (pci->num_ob_windows > ++i) { + ret = dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_IO, + pp->io_base, + pp->io_bus_addr, + pp->io_size); + if (ret) { + dev_err(pci->dev, "Failed to set IO range %pr\n", + entry->res); + return ret; + } + } else { + pp->cfg0_io_shared = true; + } + } + + if (pci->num_ob_windows <= i) + dev_warn(pci->dev, "Resources exceed number of ATU entries (%d)\n", + pci->num_ob_windows); + + return 0; +} + +int dw_pcie_setup_rc(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + u32 val, ctrl, num_ctrls; + int ret; /* * Enable DBI read-only registers for writing/updating configuration. @@ -582,45 +758,15 @@ void dw_pcie_setup_rc(struct pcie_port *pp) PCI_COMMAND_MASTER | PCI_COMMAND_SERR; dw_pcie_writel_dbi(pci, PCI_COMMAND, val); - /* Ensure all outbound windows are disabled so there are multiple matches */ - for (i = 0; i < pci->num_ob_windows; i++) - dw_pcie_disable_atu(pci, i, DW_PCIE_REGION_OUTBOUND); - /* * If the platform provides its own child bus config accesses, it means * the platform uses its own address translation component rather than * ATU, so we should not program the ATU here. */ if (pp->bridge->child_ops == &dw_child_pcie_ops) { - int atu_idx = 0; - struct resource_entry *entry; - - /* Get last memory resource entry */ - resource_list_for_each_entry(entry, &pp->bridge->windows) { - if (resource_type(entry->res) != IORESOURCE_MEM) - continue; - - if (pci->num_ob_windows <= ++atu_idx) - break; - - dw_pcie_prog_outbound_atu(pci, atu_idx, - PCIE_ATU_TYPE_MEM, entry->res->start, - entry->res->start - entry->offset, - resource_size(entry->res)); - } - - if (pp->io_size) { - if (pci->num_ob_windows > ++atu_idx) - dw_pcie_prog_outbound_atu(pci, atu_idx, - PCIE_ATU_TYPE_IO, pp->io_base, - pp->io_bus_addr, pp->io_size); - else - pci->io_cfg_atu_shared = true; - } - - if (pci->num_ob_windows <= atu_idx) - dev_warn(pci->dev, "Resources exceed number of ATU entries (%d)", - pci->num_ob_windows); + ret = dw_pcie_iatu_setup(pp); + if (ret) + return ret; } dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0); @@ -633,5 +779,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp) dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val); dw_pcie_dbi_ro_wr_dis(pci); + + return 0; } EXPORT_SYMBOL_GPL(dw_pcie_setup_rc); diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c index 0c5de87d3cc6..1fcfb840f238 100644 --- a/drivers/pci/controller/dwc/pcie-designware-plat.c +++ b/drivers/pci/controller/dwc/pcie-designware-plat.c @@ -17,13 +17,11 @@ #include <linux/platform_device.h> #include <linux/resource.h> #include <linux/types.h> -#include <linux/regmap.h> #include "pcie-designware.h" struct dw_plat_pcie { struct dw_pcie *pci; - struct regmap *regmap; enum dw_pcie_device_mode mode; }; @@ -31,20 +29,9 @@ struct dw_plat_pcie_of_data { enum dw_pcie_device_mode mode; }; -static const struct of_device_id dw_plat_pcie_of_match[]; - static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = { }; -static int dw_plat_pcie_establish_link(struct dw_pcie *pci) -{ - return 0; -} - -static const struct dw_pcie_ops dw_pcie_ops = { - .start_link = dw_plat_pcie_establish_link, -}; - static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep) { struct dw_pcie *pci = to_dw_pcie_from_ep(ep); @@ -96,7 +83,7 @@ static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie, struct platform_device *pdev) { struct dw_pcie *pci = dw_plat_pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = &pdev->dev; int ret; @@ -140,7 +127,6 @@ static int dw_plat_pcie_probe(struct platform_device *pdev) return -ENOMEM; pci->dev = dev; - pci->ops = &dw_pcie_ops; dw_plat_pcie->pci = pci; dw_plat_pcie->mode = mode; @@ -153,20 +139,21 @@ static int dw_plat_pcie_probe(struct platform_device *pdev) return -ENODEV; ret = dw_plat_add_pcie_port(dw_plat_pcie, pdev); - if (ret < 0) - return ret; break; case DW_PCIE_EP_TYPE: if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_EP)) return -ENODEV; pci->ep.ops = &pcie_ep_ops; - return dw_pcie_ep_init(&pci->ep); + ret = dw_pcie_ep_init(&pci->ep); + break; default: dev_err(dev, "INVALID device type %d\n", dw_plat_pcie->mode); + ret = -EINVAL; + break; } - return 0; + return ret; } static const struct dw_plat_pcie_of_data dw_plat_pcie_rc_of_data = { diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index d92c8a25094f..c6725c519a47 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -8,14 +8,41 @@ * Author: Jingoo Han <jg1.han@samsung.com> */ +#include <linux/align.h> +#include <linux/bitops.h> #include <linux/delay.h> #include <linux/of.h> #include <linux/of_platform.h> +#include <linux/sizes.h> #include <linux/types.h> #include "../../pci.h" #include "pcie-designware.h" +void dw_pcie_version_detect(struct dw_pcie *pci) +{ + u32 ver; + + /* The content of the CSR is zero on DWC PCIe older than v4.70a */ + ver = dw_pcie_readl_dbi(pci, PCIE_VERSION_NUMBER); + if (!ver) + return; + + if (pci->version && pci->version != ver) + dev_warn(pci->dev, "Versions don't match (%08x != %08x)\n", + pci->version, ver); + else + pci->version = ver; + + ver = dw_pcie_readl_dbi(pci, PCIE_VERSION_TYPE); + + if (pci->type && pci->type != ver) + dev_warn(pci->dev, "Types don't match (%08x != %08x)\n", + pci->type, ver); + else + pci->type = ver; +} + /* * These interfaces resemble the pci_find_*capability() interfaces, but these * are for configuring host controllers, which are bridges *to* PCI devices but @@ -181,48 +208,61 @@ void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val) dev_err(pci->dev, "write DBI address failed\n"); } -static u32 dw_pcie_readl_atu(struct dw_pcie *pci, u32 reg) +static inline void __iomem *dw_pcie_select_atu(struct dw_pcie *pci, u32 dir, + u32 index) { + if (pci->iatu_unroll_enabled) + return pci->atu_base + PCIE_ATU_UNROLL_BASE(dir, index); + + dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, dir | index); + return pci->atu_base; +} + +static u32 dw_pcie_readl_atu(struct dw_pcie *pci, u32 dir, u32 index, u32 reg) +{ + void __iomem *base; int ret; u32 val; + base = dw_pcie_select_atu(pci, dir, index); + if (pci->ops && pci->ops->read_dbi) - return pci->ops->read_dbi(pci, pci->atu_base, reg, 4); + return pci->ops->read_dbi(pci, base, reg, 4); - ret = dw_pcie_read(pci->atu_base + reg, 4, &val); + ret = dw_pcie_read(base + reg, 4, &val); if (ret) dev_err(pci->dev, "Read ATU address failed\n"); return val; } -static void dw_pcie_writel_atu(struct dw_pcie *pci, u32 reg, u32 val) +static void dw_pcie_writel_atu(struct dw_pcie *pci, u32 dir, u32 index, + u32 reg, u32 val) { + void __iomem *base; int ret; + base = dw_pcie_select_atu(pci, dir, index); + if (pci->ops && pci->ops->write_dbi) { - pci->ops->write_dbi(pci, pci->atu_base, reg, 4, val); + pci->ops->write_dbi(pci, base, reg, 4, val); return; } - ret = dw_pcie_write(pci->atu_base + reg, 4, val); + ret = dw_pcie_write(base + reg, 4, val); if (ret) dev_err(pci->dev, "Write ATU address failed\n"); } -static u32 dw_pcie_readl_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg) +static inline u32 dw_pcie_readl_atu_ob(struct dw_pcie *pci, u32 index, u32 reg) { - u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index); - - return dw_pcie_readl_atu(pci, offset + reg); + return dw_pcie_readl_atu(pci, PCIE_ATU_REGION_DIR_OB, index, reg); } -static void dw_pcie_writel_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg, - u32 val) +static inline void dw_pcie_writel_atu_ob(struct dw_pcie *pci, u32 index, u32 reg, + u32 val) { - u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index); - - dw_pcie_writel_atu(pci, offset + reg, val); + dw_pcie_writel_atu(pci, PCIE_ATU_REGION_DIR_OB, index, reg, val); } static inline u32 dw_pcie_enable_ecrc(u32 val) @@ -266,264 +306,160 @@ static inline u32 dw_pcie_enable_ecrc(u32 val) return val | PCIE_ATU_TD; } -static void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, u8 func_no, - int index, int type, - u64 cpu_addr, u64 pci_addr, - u64 size) +static int __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, + int index, int type, u64 cpu_addr, + u64 pci_addr, u64 size) { u32 retries, val; - u64 limit_addr = cpu_addr + size - 1; - - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_BASE, - lower_32_bits(cpu_addr)); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_BASE, - upper_32_bits(cpu_addr)); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_LIMIT, - lower_32_bits(limit_addr)); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_LIMIT, - upper_32_bits(limit_addr)); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET, - lower_32_bits(pci_addr)); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET, - upper_32_bits(pci_addr)); - val = type | PCIE_ATU_FUNC_NUM(func_no); - val = upper_32_bits(size - 1) ? - val | PCIE_ATU_INCREASE_REGION_SIZE : val; - if (pci->version == 0x490A) - val = dw_pcie_enable_ecrc(val); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1, val); - dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2, - PCIE_ATU_ENABLE); + u64 limit_addr; - /* - * Make sure ATU enable takes effect before any subsequent config - * and I/O accesses. - */ - for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) { - val = dw_pcie_readl_ob_unroll(pci, index, - PCIE_ATU_UNR_REGION_CTRL2); - if (val & PCIE_ATU_ENABLE) - return; + if (pci->ops && pci->ops->cpu_addr_fixup) + cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr); - mdelay(LINK_WAIT_IATU); + limit_addr = cpu_addr + size - 1; + + if ((limit_addr & ~pci->region_limit) != (cpu_addr & ~pci->region_limit) || + !IS_ALIGNED(cpu_addr, pci->region_align) || + !IS_ALIGNED(pci_addr, pci->region_align) || !size) { + return -EINVAL; } - dev_err(pci->dev, "Outbound iATU is not being enabled\n"); -} -static void __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, - int index, int type, u64 cpu_addr, - u64 pci_addr, u64 size) -{ - u32 retries, val; + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LOWER_BASE, + lower_32_bits(cpu_addr)); + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_BASE, + upper_32_bits(cpu_addr)); - if (pci->ops && pci->ops->cpu_addr_fixup) - cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr); + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LIMIT, + lower_32_bits(limit_addr)); + if (dw_pcie_ver_is_ge(pci, 460A)) + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_LIMIT, + upper_32_bits(limit_addr)); - if (pci->iatu_unroll_enabled) { - dw_pcie_prog_outbound_atu_unroll(pci, func_no, index, type, - cpu_addr, pci_addr, size); - return; - } + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LOWER_TARGET, + lower_32_bits(pci_addr)); + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_TARGET, + upper_32_bits(pci_addr)); - dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, - PCIE_ATU_REGION_OUTBOUND | index); - dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_BASE, - lower_32_bits(cpu_addr)); - dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_BASE, - upper_32_bits(cpu_addr)); - dw_pcie_writel_dbi(pci, PCIE_ATU_LIMIT, - lower_32_bits(cpu_addr + size - 1)); - if (pci->version >= 0x460A) - dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_LIMIT, - upper_32_bits(cpu_addr + size - 1)); - dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, - lower_32_bits(pci_addr)); - dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET, - upper_32_bits(pci_addr)); val = type | PCIE_ATU_FUNC_NUM(func_no); - val = ((upper_32_bits(size - 1)) && (pci->version >= 0x460A)) ? - val | PCIE_ATU_INCREASE_REGION_SIZE : val; - if (pci->version == 0x490A) + if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) && + dw_pcie_ver_is_ge(pci, 460A)) + val |= PCIE_ATU_INCREASE_REGION_SIZE; + if (dw_pcie_ver_is(pci, 490A)) val = dw_pcie_enable_ecrc(val); - dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, val); - dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE); + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_REGION_CTRL1, val); + + dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); /* * Make sure ATU enable takes effect before any subsequent config * and I/O accesses. */ for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) { - val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2); + val = dw_pcie_readl_atu_ob(pci, index, PCIE_ATU_REGION_CTRL2); if (val & PCIE_ATU_ENABLE) - return; + return 0; mdelay(LINK_WAIT_IATU); } + dev_err(pci->dev, "Outbound iATU is not being enabled\n"); -} -void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, - u64 cpu_addr, u64 pci_addr, u64 size) -{ - __dw_pcie_prog_outbound_atu(pci, 0, index, type, - cpu_addr, pci_addr, size); + return -ETIMEDOUT; } -void dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int type, u64 cpu_addr, u64 pci_addr, - u64 size) +int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, + u64 cpu_addr, u64 pci_addr, u64 size) { - __dw_pcie_prog_outbound_atu(pci, func_no, index, type, - cpu_addr, pci_addr, size); + return __dw_pcie_prog_outbound_atu(pci, 0, index, type, + cpu_addr, pci_addr, size); } -static u32 dw_pcie_readl_ib_unroll(struct dw_pcie *pci, u32 index, u32 reg) +int dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, + int type, u64 cpu_addr, u64 pci_addr, + u64 size) { - u32 offset = PCIE_GET_ATU_INB_UNR_REG_OFFSET(index); - - return dw_pcie_readl_atu(pci, offset + reg); + return __dw_pcie_prog_outbound_atu(pci, func_no, index, type, + cpu_addr, pci_addr, size); } -static void dw_pcie_writel_ib_unroll(struct dw_pcie *pci, u32 index, u32 reg, - u32 val) +static inline u32 dw_pcie_readl_atu_ib(struct dw_pcie *pci, u32 index, u32 reg) { - u32 offset = PCIE_GET_ATU_INB_UNR_REG_OFFSET(index); - - dw_pcie_writel_atu(pci, offset + reg, val); + return dw_pcie_readl_atu(pci, PCIE_ATU_REGION_DIR_IB, index, reg); } -static int dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, u8 func_no, - int index, int bar, u64 cpu_addr, - enum dw_pcie_as_type as_type) +static inline void dw_pcie_writel_atu_ib(struct dw_pcie *pci, u32 index, u32 reg, + u32 val) { - int type; - u32 retries, val; - - dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET, - lower_32_bits(cpu_addr)); - dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET, - upper_32_bits(cpu_addr)); - - switch (as_type) { - case DW_PCIE_AS_MEM: - type = PCIE_ATU_TYPE_MEM; - break; - case DW_PCIE_AS_IO: - type = PCIE_ATU_TYPE_IO; - break; - default: - return -EINVAL; - } - - dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1, type | - PCIE_ATU_FUNC_NUM(func_no)); - dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2, - PCIE_ATU_FUNC_NUM_MATCH_EN | - PCIE_ATU_ENABLE | - PCIE_ATU_BAR_MODE_ENABLE | (bar << 8)); - - /* - * Make sure ATU enable takes effect before any subsequent config - * and I/O accesses. - */ - for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) { - val = dw_pcie_readl_ib_unroll(pci, index, - PCIE_ATU_UNR_REGION_CTRL2); - if (val & PCIE_ATU_ENABLE) - return 0; - - mdelay(LINK_WAIT_IATU); - } - dev_err(pci->dev, "Inbound iATU is not being enabled\n"); - - return -EBUSY; + dw_pcie_writel_atu(pci, PCIE_ATU_REGION_DIR_IB, index, reg, val); } int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int bar, u64 cpu_addr, - enum dw_pcie_as_type as_type) + int type, u64 cpu_addr, u8 bar) { - int type; u32 retries, val; - if (pci->iatu_unroll_enabled) - return dw_pcie_prog_inbound_atu_unroll(pci, func_no, index, bar, - cpu_addr, as_type); - - dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, PCIE_ATU_REGION_INBOUND | - index); - dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, lower_32_bits(cpu_addr)); - dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET, upper_32_bits(cpu_addr)); - - switch (as_type) { - case DW_PCIE_AS_MEM: - type = PCIE_ATU_TYPE_MEM; - break; - case DW_PCIE_AS_IO: - type = PCIE_ATU_TYPE_IO; - break; - default: + if (!IS_ALIGNED(cpu_addr, pci->region_align)) return -EINVAL; - } - dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type | - PCIE_ATU_FUNC_NUM(func_no)); - dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE | - PCIE_ATU_FUNC_NUM_MATCH_EN | - PCIE_ATU_BAR_MODE_ENABLE | (bar << 8)); + dw_pcie_writel_atu_ib(pci, index, PCIE_ATU_LOWER_TARGET, + lower_32_bits(cpu_addr)); + dw_pcie_writel_atu_ib(pci, index, PCIE_ATU_UPPER_TARGET, + upper_32_bits(cpu_addr)); + + dw_pcie_writel_atu_ib(pci, index, PCIE_ATU_REGION_CTRL1, type | + PCIE_ATU_FUNC_NUM(func_no)); + dw_pcie_writel_atu_ib(pci, index, PCIE_ATU_REGION_CTRL2, + PCIE_ATU_ENABLE | PCIE_ATU_FUNC_NUM_MATCH_EN | + PCIE_ATU_BAR_MODE_ENABLE | (bar << 8)); /* * Make sure ATU enable takes effect before any subsequent config * and I/O accesses. */ for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) { - val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2); + val = dw_pcie_readl_atu_ib(pci, index, PCIE_ATU_REGION_CTRL2); if (val & PCIE_ATU_ENABLE) return 0; mdelay(LINK_WAIT_IATU); } + dev_err(pci->dev, "Inbound iATU is not being enabled\n"); - return -EBUSY; + return -ETIMEDOUT; } -void dw_pcie_disable_atu(struct dw_pcie *pci, int index, - enum dw_pcie_region_type type) +void dw_pcie_disable_atu(struct dw_pcie *pci, u32 dir, int index) { - int region; - - switch (type) { - case DW_PCIE_REGION_INBOUND: - region = PCIE_ATU_REGION_INBOUND; - break; - case DW_PCIE_REGION_OUTBOUND: - region = PCIE_ATU_REGION_OUTBOUND; - break; - default: - return; - } - - dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, region | index); - dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, ~(u32)PCIE_ATU_ENABLE); + dw_pcie_writel_atu(pci, dir, index, PCIE_ATU_REGION_CTRL2, 0); } int dw_pcie_wait_for_link(struct dw_pcie *pci) { + u32 offset, val; int retries; /* Check if the link is up or not */ for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) { - if (dw_pcie_link_up(pci)) { - dev_info(pci->dev, "Link up\n"); - return 0; - } + if (dw_pcie_link_up(pci)) + break; + usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX); } - dev_info(pci->dev, "Phy link never came up\n"); + if (retries >= LINK_WAIT_MAX_RETRIES) { + dev_err(pci->dev, "Phy link never came up\n"); + return -ETIMEDOUT; + } - return -ETIMEDOUT; + offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); + val = dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKSTA); + + dev_info(pci->dev, "PCIe Gen.%u x%u link up\n", + FIELD_GET(PCI_EXP_LNKSTA_CLS, val), + FIELD_GET(PCI_EXP_LNKSTA_NLW, val)); + + return 0; } EXPORT_SYMBOL_GPL(dw_pcie_wait_for_link); @@ -534,7 +470,7 @@ int dw_pcie_link_up(struct dw_pcie *pci) if (pci->ops && pci->ops->link_up) return pci->ops->link_up(pci); - val = readl(pci->dbi_base + PCIE_PORT_DEBUG1); + val = dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG1); return ((val & PCIE_PORT_DEBUG1_LINK_UP) && (!(val & PCIE_PORT_DEBUG1_LINK_IN_TRAINING))); } @@ -586,95 +522,81 @@ static void dw_pcie_link_set_max_speed(struct dw_pcie *pci, u32 link_gen) } -static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci) +static bool dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci) { u32 val; val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT); if (val == 0xffffffff) - return 1; + return true; - return 0; + return false; } -static void dw_pcie_iatu_detect_regions_unroll(struct dw_pcie *pci) +static void dw_pcie_iatu_detect_regions(struct dw_pcie *pci) { - int max_region, i, ob = 0, ib = 0; - u32 val; + int max_region, ob, ib; + u32 val, min, dir; + u64 max; - max_region = min((int)pci->atu_size / 512, 256); - - for (i = 0; i < max_region; i++) { - dw_pcie_writel_ob_unroll(pci, i, PCIE_ATU_UNR_LOWER_TARGET, - 0x11110000); + if (pci->iatu_unroll_enabled) { + max_region = min((int)pci->atu_size / 512, 256); + } else { + dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, 0xFF); + max_region = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT) + 1; + } - val = dw_pcie_readl_ob_unroll(pci, i, PCIE_ATU_UNR_LOWER_TARGET); - if (val == 0x11110000) - ob++; - else + for (ob = 0; ob < max_region; ob++) { + dw_pcie_writel_atu_ob(pci, ob, PCIE_ATU_LOWER_TARGET, 0x11110000); + val = dw_pcie_readl_atu_ob(pci, ob, PCIE_ATU_LOWER_TARGET); + if (val != 0x11110000) break; } - for (i = 0; i < max_region; i++) { - dw_pcie_writel_ib_unroll(pci, i, PCIE_ATU_UNR_LOWER_TARGET, - 0x11110000); - - val = dw_pcie_readl_ib_unroll(pci, i, PCIE_ATU_UNR_LOWER_TARGET); - if (val == 0x11110000) - ib++; - else + for (ib = 0; ib < max_region; ib++) { + dw_pcie_writel_atu_ib(pci, ib, PCIE_ATU_LOWER_TARGET, 0x11110000); + val = dw_pcie_readl_atu_ib(pci, ib, PCIE_ATU_LOWER_TARGET); + if (val != 0x11110000) break; } - pci->num_ib_windows = ib; - pci->num_ob_windows = ob; -} - -static void dw_pcie_iatu_detect_regions(struct dw_pcie *pci) -{ - int max_region, i, ob = 0, ib = 0; - u32 val; - - dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, 0xFF); - max_region = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT) + 1; - for (i = 0; i < max_region; i++) { - dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, PCIE_ATU_REGION_OUTBOUND | i); - dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, 0x11110000); - val = dw_pcie_readl_dbi(pci, PCIE_ATU_LOWER_TARGET); - if (val == 0x11110000) - ob++; - else - break; + if (ob) { + dir = PCIE_ATU_REGION_DIR_OB; + } else if (ib) { + dir = PCIE_ATU_REGION_DIR_IB; + } else { + dev_err(pci->dev, "No iATU regions found\n"); + return; } - for (i = 0; i < max_region; i++) { - dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, PCIE_ATU_REGION_INBOUND | i); - dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, 0x11110000); - val = dw_pcie_readl_dbi(pci, PCIE_ATU_LOWER_TARGET); - if (val == 0x11110000) - ib++; - else - break; + dw_pcie_writel_atu(pci, dir, 0, PCIE_ATU_LIMIT, 0x0); + min = dw_pcie_readl_atu(pci, dir, 0, PCIE_ATU_LIMIT); + + if (dw_pcie_ver_is_ge(pci, 460A)) { + dw_pcie_writel_atu(pci, dir, 0, PCIE_ATU_UPPER_LIMIT, 0xFFFFFFFF); + max = dw_pcie_readl_atu(pci, dir, 0, PCIE_ATU_UPPER_LIMIT); + } else { + max = 0; } - pci->num_ib_windows = ib; pci->num_ob_windows = ob; + pci->num_ib_windows = ib; + pci->region_align = 1 << fls(min); + pci->region_limit = (max << 32) | (SZ_4G - 1); } void dw_pcie_iatu_detect(struct dw_pcie *pci) { - struct device *dev = pci->dev; - struct platform_device *pdev = to_platform_device(dev); + struct platform_device *pdev = to_platform_device(pci->dev); - if (pci->version >= 0x480A || (!pci->version && - dw_pcie_iatu_unroll_enabled(pci))) { - pci->iatu_unroll_enabled = true; + pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci); + if (pci->iatu_unroll_enabled) { if (!pci->atu_base) { struct resource *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "atu"); if (res) { pci->atu_size = resource_size(res); - pci->atu_base = devm_ioremap_resource(dev, res); + pci->atu_base = devm_ioremap_resource(pci->dev, res); } if (!pci->atu_base || IS_ERR(pci->atu_base)) pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; @@ -683,23 +605,25 @@ void dw_pcie_iatu_detect(struct dw_pcie *pci) if (!pci->atu_size) /* Pick a minimal default, enough for 8 in and 8 out windows */ pci->atu_size = SZ_4K; + } else { + pci->atu_base = pci->dbi_base + PCIE_ATU_VIEWPORT_BASE; + pci->atu_size = PCIE_ATU_VIEWPORT_SIZE; + } - dw_pcie_iatu_detect_regions_unroll(pci); - } else - dw_pcie_iatu_detect_regions(pci); + dw_pcie_iatu_detect_regions(pci); dev_info(pci->dev, "iATU unroll: %s\n", pci->iatu_unroll_enabled ? "enabled" : "disabled"); - dev_info(pci->dev, "Detected iATU regions: %u outbound, %u inbound", - pci->num_ob_windows, pci->num_ib_windows); + dev_info(pci->dev, "iATU regions: %u ob, %u ib, align %uK, limit %lluG\n", + pci->num_ob_windows, pci->num_ib_windows, + pci->region_align / SZ_1K, (pci->region_limit + 1) / SZ_1G); } void dw_pcie_setup(struct dw_pcie *pci) { + struct device_node *np = pci->dev->of_node; u32 val; - struct device *dev = pci->dev; - struct device_node *np = dev->of_node; if (pci->link_gen > 0) dw_pcie_link_set_max_speed(pci, pci->link_gen); @@ -726,6 +650,13 @@ void dw_pcie_setup(struct dw_pcie *pci) val |= PORT_LINK_DLL_LINK_EN; dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val); + if (of_property_read_bool(np, "snps,enable-cdm-check")) { + val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS); + val |= PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS | + PCIE_PL_CHK_REG_CHK_REG_START; + dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val); + } + of_property_read_u32(np, "num-lanes", &pci->num_lanes); if (!pci->num_lanes) { dev_dbg(pci->dev, "Using h/w default number of lanes\n"); @@ -772,11 +703,4 @@ void dw_pcie_setup(struct dw_pcie *pci) break; } dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val); - - if (of_property_read_bool(np, "snps,enable-cdm-check")) { - val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS); - val |= PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS | - PCIE_PL_CHK_REG_CHK_REG_START; - dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val); - } } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 7d6e9b7576be..09b887093a84 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -20,6 +20,29 @@ #include <linux/pci-epc.h> #include <linux/pci-epf.h> +/* DWC PCIe IP-core versions (native support since v4.70a) */ +#define DW_PCIE_VER_365A 0x3336352a +#define DW_PCIE_VER_460A 0x3436302a +#define DW_PCIE_VER_470A 0x3437302a +#define DW_PCIE_VER_480A 0x3438302a +#define DW_PCIE_VER_490A 0x3439302a +#define DW_PCIE_VER_520A 0x3532302a + +#define __dw_pcie_ver_cmp(_pci, _ver, _op) \ + ((_pci)->version _op DW_PCIE_VER_ ## _ver) + +#define dw_pcie_ver_is(_pci, _ver) __dw_pcie_ver_cmp(_pci, _ver, ==) + +#define dw_pcie_ver_is_ge(_pci, _ver) __dw_pcie_ver_cmp(_pci, _ver, >=) + +#define dw_pcie_ver_type_is(_pci, _ver, _type) \ + (__dw_pcie_ver_cmp(_pci, _ver, ==) && \ + __dw_pcie_ver_cmp(_pci, TYPE_ ## _type, ==)) + +#define dw_pcie_ver_type_is_ge(_pci, _ver, _type) \ + (__dw_pcie_ver_cmp(_pci, _ver, ==) && \ + __dw_pcie_ver_cmp(_pci, TYPE_ ## _type, >=)) + /* Parameters for the waiting for link up routine */ #define LINK_WAIT_MAX_RETRIES 10 #define LINK_WAIT_USLEEP_MIN 90000 @@ -74,13 +97,34 @@ #define PCIE_MSI_INTR0_MASK 0x82C #define PCIE_MSI_INTR0_STATUS 0x830 +#define GEN3_RELATED_OFF 0x890 +#define GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL BIT(0) +#define GEN3_RELATED_OFF_RXEQ_RGRDLESS_RXTS BIT(13) +#define GEN3_RELATED_OFF_GEN3_EQ_DISABLE BIT(16) +#define GEN3_RELATED_OFF_RATE_SHADOW_SEL_SHIFT 24 +#define GEN3_RELATED_OFF_RATE_SHADOW_SEL_MASK GENMASK(25, 24) + #define PCIE_PORT_MULTI_LANE_CTRL 0x8C0 #define PORT_MLTI_UPCFG_SUPPORT BIT(7) +#define PCIE_VERSION_NUMBER 0x8F8 +#define PCIE_VERSION_TYPE 0x8FC + +/* + * iATU inbound and outbound windows CSRs. Before the IP-core v4.80a each + * iATU region CSRs had been indirectly accessible by means of the dedicated + * viewport selector. The iATU/eDMA CSRs space was re-designed in DWC PCIe + * v4.80a in a way so the viewport was unrolled into the directly accessible + * iATU/eDMA CSRs space. + */ #define PCIE_ATU_VIEWPORT 0x900 -#define PCIE_ATU_REGION_INBOUND BIT(31) -#define PCIE_ATU_REGION_OUTBOUND 0 -#define PCIE_ATU_CR1 0x904 +#define PCIE_ATU_REGION_DIR_IB BIT(31) +#define PCIE_ATU_REGION_DIR_OB 0 +#define PCIE_ATU_VIEWPORT_BASE 0x904 +#define PCIE_ATU_UNROLL_BASE(dir, index) \ + (((index) << 9) | ((dir == PCIE_ATU_REGION_DIR_IB) ? BIT(8) : 0)) +#define PCIE_ATU_VIEWPORT_SIZE 0x2C +#define PCIE_ATU_REGION_CTRL1 0x000 #define PCIE_ATU_INCREASE_REGION_SIZE BIT(13) #define PCIE_ATU_TYPE_MEM 0x0 #define PCIE_ATU_TYPE_IO 0x2 @@ -88,19 +132,19 @@ #define PCIE_ATU_TYPE_CFG1 0x5 #define PCIE_ATU_TD BIT(8) #define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20) -#define PCIE_ATU_CR2 0x908 +#define PCIE_ATU_REGION_CTRL2 0x004 #define PCIE_ATU_ENABLE BIT(31) #define PCIE_ATU_BAR_MODE_ENABLE BIT(30) #define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19) -#define PCIE_ATU_LOWER_BASE 0x90C -#define PCIE_ATU_UPPER_BASE 0x910 -#define PCIE_ATU_LIMIT 0x914 -#define PCIE_ATU_LOWER_TARGET 0x918 +#define PCIE_ATU_LOWER_BASE 0x008 +#define PCIE_ATU_UPPER_BASE 0x00C +#define PCIE_ATU_LIMIT 0x010 +#define PCIE_ATU_LOWER_TARGET 0x014 #define PCIE_ATU_BUS(x) FIELD_PREP(GENMASK(31, 24), x) #define PCIE_ATU_DEV(x) FIELD_PREP(GENMASK(23, 19), x) #define PCIE_ATU_FUNC(x) FIELD_PREP(GENMASK(18, 16), x) -#define PCIE_ATU_UPPER_TARGET 0x91C -#define PCIE_ATU_UPPER_LIMIT 0x924 +#define PCIE_ATU_UPPER_TARGET 0x018 +#define PCIE_ATU_UPPER_LIMIT 0x020 #define PCIE_MISC_CONTROL_1_OFF 0x8BC #define PCIE_DBI_RO_WR_EN BIT(0) @@ -131,6 +175,25 @@ #define PCIE_ATU_UNR_UPPER_LIMIT 0x20 /* + * RAS-DES register definitions + */ +#define PCIE_RAS_DES_EVENT_COUNTER_CONTROL 0x8 +#define EVENT_COUNTER_ALL_CLEAR 0x3 +#define EVENT_COUNTER_ENABLE_ALL 0x7 +#define EVENT_COUNTER_ENABLE_SHIFT 2 +#define EVENT_COUNTER_EVENT_SEL_MASK GENMASK(7, 0) +#define EVENT_COUNTER_EVENT_SEL_SHIFT 16 +#define EVENT_COUNTER_EVENT_Tx_L0S 0x2 +#define EVENT_COUNTER_EVENT_Rx_L0S 0x3 +#define EVENT_COUNTER_EVENT_L1 0x5 +#define EVENT_COUNTER_EVENT_L1_1 0x7 +#define EVENT_COUNTER_EVENT_L1_2 0x8 +#define EVENT_COUNTER_GROUP_SEL_SHIFT 24 +#define EVENT_COUNTER_GROUP_5 0x5 + +#define PCIE_RAS_DES_EVENT_COUNTER_DATA 0xc + +/* * The default address offset between dbi_base and atu_base. Root controller * drivers are not required to initialize atu_base if the offset matches this * default; the driver core automatically derives atu_base from dbi_base using @@ -138,13 +201,6 @@ */ #define DEFAULT_DBI_ATU_OFFSET (0x3 << 20) -/* Register address builder */ -#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \ - ((region) << 9) - -#define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \ - (((region) << 9) | BIT(8)) - #define MAX_MSI_IRQS 256 #define MAX_MSI_IRQS_PER_CTRL 32 #define MAX_MSI_CTRLS (MAX_MSI_IRQS / MAX_MSI_IRQS_PER_CTRL) @@ -155,16 +211,10 @@ #define MAX_IATU_IN 256 #define MAX_IATU_OUT 256 -struct pcie_port; struct dw_pcie; +struct dw_pcie_rp; struct dw_pcie_ep; -enum dw_pcie_region_type { - DW_PCIE_REGION_UNKNOWN, - DW_PCIE_REGION_INBOUND, - DW_PCIE_REGION_OUTBOUND, -}; - enum dw_pcie_device_mode { DW_PCIE_UNKNOWN_TYPE, DW_PCIE_EP_TYPE, @@ -173,12 +223,14 @@ enum dw_pcie_device_mode { }; struct dw_pcie_host_ops { - int (*host_init)(struct pcie_port *pp); - int (*msi_host_init)(struct pcie_port *pp); + int (*host_init)(struct dw_pcie_rp *pp); + void (*host_deinit)(struct dw_pcie_rp *pp); + int (*msi_host_init)(struct dw_pcie_rp *pp); }; -struct pcie_port { +struct dw_pcie_rp { bool has_msi_ctrl:1; + bool cfg0_io_shared:1; u64 cfg0_base; void __iomem *va_cfg0_base; u32 cfg0_size; @@ -187,11 +239,11 @@ struct pcie_port { u32 io_size; int irq; const struct dw_pcie_host_ops *ops; - int msi_irq; + int msi_irq[MAX_MSI_CTRLS]; struct irq_domain *irq_domain; struct irq_domain *msi_domain; - u16 msi_msg; dma_addr_t msi_data; + struct page *msi_page; struct irq_chip *msi_irq_chip; u32 num_vectors; u32 irq_mask[MAX_MSI_CTRLS]; @@ -200,12 +252,6 @@ struct pcie_port { DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); }; -enum dw_pcie_as_type { - DW_PCIE_AS_UNKNOWN, - DW_PCIE_AS_MEM, - DW_PCIE_AS_IO, -}; - struct dw_pcie_ep_ops { void (*ep_init)(struct dw_pcie_ep *ep); int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no, @@ -261,20 +307,21 @@ struct dw_pcie { struct device *dev; void __iomem *dbi_base; void __iomem *dbi_base2; - /* Used when iatu_unroll_enabled is true */ void __iomem *atu_base; size_t atu_size; u32 num_ib_windows; u32 num_ob_windows; - struct pcie_port pp; + u32 region_align; + u64 region_limit; + struct dw_pcie_rp pp; struct dw_pcie_ep ep; const struct dw_pcie_ops *ops; - unsigned int version; + u32 version; + u32 type; int num_lanes; int link_gen; u8 n_fts[2]; bool iatu_unroll_enabled: 1; - bool io_cfg_atu_shared: 1; }; #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp) @@ -282,6 +329,8 @@ struct dw_pcie { #define to_dw_pcie_from_ep(endpoint) \ container_of((endpoint), struct dw_pcie, ep) +void dw_pcie_version_detect(struct dw_pcie *pci); + u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap); u16 dw_pcie_find_ext_capability(struct dw_pcie *pci, u8 cap); @@ -294,17 +343,13 @@ void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val); int dw_pcie_link_up(struct dw_pcie *pci); void dw_pcie_upconfig_setup(struct dw_pcie *pci); int dw_pcie_wait_for_link(struct dw_pcie *pci); -void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, - int type, u64 cpu_addr, u64 pci_addr, - u64 size); -void dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int type, u64 cpu_addr, u64 pci_addr, - u64 size); +int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, + u64 cpu_addr, u64 pci_addr, u64 size); +int dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, + int type, u64 cpu_addr, u64 pci_addr, u64 size); int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int bar, u64 cpu_addr, - enum dw_pcie_as_type as_type); -void dw_pcie_disable_atu(struct dw_pcie *pci, int index, - enum dw_pcie_region_type type); + int type, u64 cpu_addr, u8 bar); +void dw_pcie_disable_atu(struct dw_pcie *pci, u32 dir, int index); void dw_pcie_setup(struct dw_pcie *pci); void dw_pcie_iatu_detect(struct dw_pcie *pci); @@ -365,34 +410,49 @@ static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci) dw_pcie_writel_dbi(pci, reg, val); } +static inline int dw_pcie_start_link(struct dw_pcie *pci) +{ + if (pci->ops && pci->ops->start_link) + return pci->ops->start_link(pci); + + return 0; +} + +static inline void dw_pcie_stop_link(struct dw_pcie *pci) +{ + if (pci->ops && pci->ops->stop_link) + pci->ops->stop_link(pci); +} + #ifdef CONFIG_PCIE_DW_HOST -irqreturn_t dw_handle_msi_irq(struct pcie_port *pp); -void dw_pcie_setup_rc(struct pcie_port *pp); -int dw_pcie_host_init(struct pcie_port *pp); -void dw_pcie_host_deinit(struct pcie_port *pp); -int dw_pcie_allocate_domains(struct pcie_port *pp); +irqreturn_t dw_handle_msi_irq(struct dw_pcie_rp *pp); +int dw_pcie_setup_rc(struct dw_pcie_rp *pp); +int dw_pcie_host_init(struct dw_pcie_rp *pp); +void dw_pcie_host_deinit(struct dw_pcie_rp *pp); +int dw_pcie_allocate_domains(struct dw_pcie_rp *pp); void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where); #else -static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) +static inline irqreturn_t dw_handle_msi_irq(struct dw_pcie_rp *pp) { return IRQ_NONE; } -static inline void dw_pcie_setup_rc(struct pcie_port *pp) +static inline int dw_pcie_setup_rc(struct dw_pcie_rp *pp) { + return 0; } -static inline int dw_pcie_host_init(struct pcie_port *pp) +static inline int dw_pcie_host_init(struct dw_pcie_rp *pp) { return 0; } -static inline void dw_pcie_host_deinit(struct pcie_port *pp) +static inline void dw_pcie_host_deinit(struct dw_pcie_rp *pp) { } -static inline int dw_pcie_allocate_domains(struct pcie_port *pp) +static inline int dw_pcie_allocate_domains(struct dw_pcie_rp *pp) { return 0; } diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c index 8c5bb9d7cc36..c1e7653e508e 100644 --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c @@ -186,7 +186,7 @@ static int rockchip_pcie_start_link(struct dw_pcie *pci) return 0; } -static int rockchip_pcie_host_init(struct pcie_port *pp) +static int rockchip_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct rockchip_pcie *rockchip = to_rockchip_pcie(pci); @@ -288,7 +288,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct rockchip_pcie *rockchip; - struct pcie_port *pp; + struct dw_pcie_rp *pp; int ret; rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL); diff --git a/drivers/pci/controller/dwc/pcie-fu740.c b/drivers/pci/controller/dwc/pcie-fu740.c index 02cc70d8cc06..0c90583c078b 100644 --- a/drivers/pci/controller/dwc/pcie-fu740.c +++ b/drivers/pci/controller/dwc/pcie-fu740.c @@ -16,11 +16,9 @@ #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/kernel.h> -#include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/platform_device.h> -#include <linux/regulator/consumer.h> #include <linux/resource.h> #include <linux/types.h> #include <linux/interrupt.h> @@ -236,7 +234,7 @@ err: return ret; } -static int fu740_pcie_host_init(struct pcie_port *pp) +static int fu740_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct fu740_pcie *afp = to_fu740_pcie(pci); diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c index 410555dccb6d..e2b80f10030d 100644 --- a/drivers/pci/controller/dwc/pcie-histb.c +++ b/drivers/pci/controller/dwc/pcie-histb.c @@ -74,7 +74,7 @@ static void histb_pcie_writel(struct histb_pcie *histb_pcie, u32 reg, u32 val) writel(val, histb_pcie->ctrl + reg); } -static void histb_pcie_dbi_w_mode(struct pcie_port *pp, bool enable) +static void histb_pcie_dbi_w_mode(struct dw_pcie_rp *pp, bool enable) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct histb_pcie *hipcie = to_histb_pcie(pci); @@ -88,7 +88,7 @@ static void histb_pcie_dbi_w_mode(struct pcie_port *pp, bool enable) histb_pcie_writel(hipcie, PCIE_SYS_CTRL0, val); } -static void histb_pcie_dbi_r_mode(struct pcie_port *pp, bool enable) +static void histb_pcie_dbi_r_mode(struct dw_pcie_rp *pp, bool enable) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct histb_pcie *hipcie = to_histb_pcie(pci); @@ -180,7 +180,7 @@ static int histb_pcie_start_link(struct dw_pcie *pci) return 0; } -static int histb_pcie_host_init(struct pcie_port *pp) +static int histb_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct histb_pcie *hipcie = to_histb_pcie(pci); @@ -219,7 +219,7 @@ static void histb_pcie_host_disable(struct histb_pcie *hipcie) regulator_disable(hipcie->vpcie); } -static int histb_pcie_host_enable(struct pcie_port *pp) +static int histb_pcie_host_enable(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct histb_pcie *hipcie = to_histb_pcie(pci); @@ -297,7 +297,7 @@ static int histb_pcie_probe(struct platform_device *pdev) { struct histb_pcie *hipcie; struct dw_pcie *pci; - struct pcie_port *pp; + struct dw_pcie_rp *pp; struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; enum of_gpio_flags of_flags; diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c index 5ba144924ff8..333c33d98a70 100644 --- a/drivers/pci/controller/dwc/pcie-intel-gw.c +++ b/drivers/pci/controller/dwc/pcie-intel-gw.c @@ -58,10 +58,6 @@ #define BUS_IATU_OFFSET SZ_256M #define RESET_INTERVAL_MS 100 -struct intel_pcie_soc { - unsigned int pcie_ver; -}; - struct intel_pcie { struct dw_pcie pci; void __iomem *app_base; @@ -306,7 +302,11 @@ static int intel_pcie_host_setup(struct intel_pcie *pcie) intel_pcie_ltssm_disable(pcie); intel_pcie_link_setup(pcie); intel_pcie_init_n_fts(pci); - dw_pcie_setup_rc(&pci->pp); + + ret = dw_pcie_setup_rc(&pci->pp); + if (ret) + goto app_init_err; + dw_pcie_upconfig_setup(pci); intel_pcie_device_rst_deassert(pcie); @@ -343,7 +343,7 @@ static void __intel_pcie_remove(struct intel_pcie *pcie) static int intel_pcie_remove(struct platform_device *pdev) { struct intel_pcie *pcie = platform_get_drvdata(pdev); - struct pcie_port *pp = &pcie->pci.pp; + struct dw_pcie_rp *pp = &pcie->pci.pp; dw_pcie_host_deinit(pp); __intel_pcie_remove(pcie); @@ -351,7 +351,7 @@ static int intel_pcie_remove(struct platform_device *pdev) return 0; } -static int __maybe_unused intel_pcie_suspend_noirq(struct device *dev) +static int intel_pcie_suspend_noirq(struct device *dev) { struct intel_pcie *pcie = dev_get_drvdata(dev); int ret; @@ -366,14 +366,14 @@ static int __maybe_unused intel_pcie_suspend_noirq(struct device *dev) return ret; } -static int __maybe_unused intel_pcie_resume_noirq(struct device *dev) +static int intel_pcie_resume_noirq(struct device *dev) { struct intel_pcie *pcie = dev_get_drvdata(dev); return intel_pcie_host_setup(pcie); } -static int intel_pcie_rc_init(struct pcie_port *pp) +static int intel_pcie_rc_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct intel_pcie *pcie = dev_get_drvdata(pci->dev); @@ -394,16 +394,11 @@ static const struct dw_pcie_host_ops intel_pcie_dw_ops = { .host_init = intel_pcie_rc_init, }; -static const struct intel_pcie_soc pcie_data = { - .pcie_ver = 0x520A, -}; - static int intel_pcie_probe(struct platform_device *pdev) { - const struct intel_pcie_soc *data; struct device *dev = &pdev->dev; struct intel_pcie *pcie; - struct pcie_port *pp; + struct dw_pcie_rp *pp; struct dw_pcie *pci; int ret; @@ -424,12 +419,7 @@ static int intel_pcie_probe(struct platform_device *pdev) if (ret) return ret; - data = device_get_match_data(dev); - if (!data) - return -ENODEV; - pci->ops = &intel_pcie_ops; - pci->version = data->pcie_ver; pp->ops = &intel_pcie_dw_ops; ret = dw_pcie_host_init(pp); @@ -442,12 +432,12 @@ static int intel_pcie_probe(struct platform_device *pdev) } static const struct dev_pm_ops intel_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(intel_pcie_suspend_noirq, - intel_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(intel_pcie_suspend_noirq, + intel_pcie_resume_noirq) }; static const struct of_device_id of_intel_pcie_match[] = { - { .compatible = "intel,lgm-pcie", .data = &pcie_data }, + { .compatible = "intel,lgm-pcie" }, {} }; diff --git a/drivers/pci/controller/dwc/pcie-keembay.c b/drivers/pci/controller/dwc/pcie-keembay.c index 1ac29a6eef22..f90f36bac018 100644 --- a/drivers/pci/controller/dwc/pcie-keembay.c +++ b/drivers/pci/controller/dwc/pcie-keembay.c @@ -231,7 +231,7 @@ static void keembay_pcie_msi_irq_handler(struct irq_desc *desc) struct keembay_pcie *pcie = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); u32 val, mask, status; - struct pcie_port *pp; + struct dw_pcie_rp *pp; /* * Keem Bay PCIe Controller provides an additional IP logic on top of @@ -332,13 +332,13 @@ static int keembay_pcie_add_pcie_port(struct keembay_pcie *pcie, struct platform_device *pdev) { struct dw_pcie *pci = &pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = &pdev->dev; u32 val; int ret; pp->ops = &keembay_pcie_host_ops; - pp->msi_irq = -ENODEV; + pp->msi_irq[0] = -ENODEV; ret = keembay_pcie_setup_msi_irq(pcie); if (ret) diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c index a52cad269f85..7f67aad71df4 100644 --- a/drivers/pci/controller/dwc/pcie-kirin.c +++ b/drivers/pci/controller/dwc/pcie-kirin.c @@ -620,7 +620,7 @@ static int kirin_pcie_start_link(struct dw_pcie *pci) return 0; } -static int kirin_pcie_host_init(struct pcie_port *pp) +static int kirin_pcie_host_init(struct dw_pcie_rp *pp) { pp->bridge->ops = &kirin_pci_ops; diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 2ea13750b492..66886dc6e777 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -41,6 +41,9 @@ #define L23_CLK_RMV_DIS BIT(2) #define L1_CLK_RMV_DIS BIT(1) +#define PCIE20_PARF_PM_CTRL 0x20 +#define REQ_NOT_ENTR_L1 BIT(5) + #define PCIE20_PARF_PHY_CTRL 0x40 #define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16) #define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16) @@ -52,6 +55,10 @@ #define PCIE20_PARF_DBI_BASE_ADDR 0x168 #define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16C #define PCIE20_PARF_MHI_CLOCK_RESET_CTRL 0x174 +#define AHB_CLK_EN BIT(0) +#define MSTR_AXI_CLK_EN BIT(1) +#define BYPASS BIT(4) + #define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT 0x178 #define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8 #define PCIE20_PARF_LTSSM 0x1B0 @@ -69,7 +76,20 @@ #define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c #define CFG_BRIDGE_SB_INIT BIT(0) -#define PCIE_CAP_LINK1_VAL 0x2FD7F +#define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, \ + 250) +#define PCIE_CAP_SLOT_POWER_LIMIT_SCALE FIELD_PREP(PCI_EXP_SLTCAP_SPLS, \ + 1) +#define PCIE_CAP_SLOT_VAL (PCI_EXP_SLTCAP_ABP | \ + PCI_EXP_SLTCAP_PCP | \ + PCI_EXP_SLTCAP_MRLSP | \ + PCI_EXP_SLTCAP_AIP | \ + PCI_EXP_SLTCAP_PIP | \ + PCI_EXP_SLTCAP_HPS | \ + PCI_EXP_SLTCAP_HPC | \ + PCI_EXP_SLTCAP_EIP | \ + PCIE_CAP_SLOT_POWER_LIMIT_VAL | \ + PCIE_CAP_SLOT_POWER_LIMIT_SCALE) #define PCIE20_PARF_Q2A_FLUSH 0x1AC @@ -128,7 +148,6 @@ struct qcom_pcie_resources_2_3_2 { struct clk *master_clk; struct clk *slave_clk; struct clk *cfg_clk; - struct clk *pipe_clk; struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY]; }; @@ -165,10 +184,11 @@ struct qcom_pcie_resources_2_7_0 { int num_clks; struct regulator_bulk_data supplies[2]; struct reset_control *pci_reset; - struct clk *pipe_clk; - struct clk *pipe_clk_src; - struct clk *phy_pipe_clk; - struct clk *ref_clk_src; +}; + +struct qcom_pcie_resources_2_9_0 { + struct clk_bulk_data clks[5]; + struct reset_control *rst; }; union qcom_pcie_resources { @@ -178,6 +198,7 @@ union qcom_pcie_resources { struct qcom_pcie_resources_2_3_3 v2_3_3; struct qcom_pcie_resources_2_4_0 v2_4_0; struct qcom_pcie_resources_2_7_0 v2_7_0; + struct qcom_pcie_resources_2_9_0 v2_9_0; }; struct qcom_pcie; @@ -194,7 +215,6 @@ struct qcom_pcie_ops { struct qcom_pcie_cfg { const struct qcom_pcie_ops *ops; - unsigned int pipe_clk_need_muxing:1; unsigned int has_tbu_clk:1; unsigned int has_ddrss_sf_tbu_clk:1; unsigned int has_aggre0_clk:1; @@ -325,8 +345,6 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; - struct device_node *node = dev->of_node; - u32 val; int ret; /* reset the PCIe interface as uboot can leave it undefined state */ @@ -337,8 +355,6 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) reset_control_assert(res->ext_reset); reset_control_assert(res->phy_reset); - writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL); - ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies); if (ret < 0) { dev_err(dev, "cannot enable regulators\n"); @@ -381,15 +397,42 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) goto err_deassert_axi; } - ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); - if (ret) - goto err_clks; + return 0; + +err_deassert_axi: + reset_control_assert(res->por_reset); +err_deassert_por: + reset_control_assert(res->pci_reset); +err_deassert_pci: + reset_control_assert(res->phy_reset); +err_deassert_phy: + reset_control_assert(res->ext_reset); +err_deassert_ext: + reset_control_assert(res->ahb_reset); +err_deassert_ahb: + regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); + + return ret; +} + +static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie) +{ + struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0; + struct dw_pcie *pci = pcie->pci; + struct device *dev = pci->dev; + struct device_node *node = dev->of_node; + u32 val; + int ret; /* enable PCIe clocks and resets */ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL); val &= ~BIT(0); writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL); + ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); + if (ret) + return ret; + if (of_device_is_compatible(node, "qcom,pcie-ipq8064") || of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) { writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) | @@ -428,23 +471,6 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1); return 0; - -err_clks: - reset_control_assert(res->axi_reset); -err_deassert_axi: - reset_control_assert(res->por_reset); -err_deassert_por: - reset_control_assert(res->pci_reset); -err_deassert_pci: - reset_control_assert(res->phy_reset); -err_deassert_phy: - reset_control_assert(res->ext_reset); -err_deassert_ext: - reset_control_assert(res->ahb_reset); -err_deassert_ahb: - regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); - - return ret; } static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie) @@ -532,16 +558,6 @@ static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie) goto err_slave; } - /* change DBI base address */ - writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR); - - if (IS_ENABLED(CONFIG_PCI_MSI)) { - u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); - - val |= BIT(31); - writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); - } - return 0; err_slave: clk_disable_unprepare(res->slave_bus); @@ -557,6 +573,21 @@ err_res: return ret; } +static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie) +{ + /* change DBI base address */ + writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR); + + if (IS_ENABLED(CONFIG_PCI_MSI)) { + u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); + + val |= BIT(31); + writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); + } + + return 0; +} + static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie) { u32 val; @@ -597,8 +628,7 @@ static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie) if (IS_ERR(res->slave_clk)) return PTR_ERR(res->slave_clk); - res->pipe_clk = devm_clk_get(dev, "pipe"); - return PTR_ERR_OR_ZERO(res->pipe_clk); + return 0; } static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie) @@ -613,19 +643,11 @@ static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie) regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); } -static void qcom_pcie_post_deinit_2_3_2(struct qcom_pcie *pcie) -{ - struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2; - - clk_disable_unprepare(res->pipe_clk); -} - static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie) { struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; - u32 val; int ret; ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies); @@ -658,6 +680,25 @@ static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie) goto err_slave_clk; } + return 0; + +err_slave_clk: + clk_disable_unprepare(res->master_clk); +err_master_clk: + clk_disable_unprepare(res->cfg_clk); +err_cfg_clk: + clk_disable_unprepare(res->aux_clk); + +err_aux_clk: + regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); + + return ret; +} + +static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie) +{ + u32 val; + /* enable PCIe clocks and resets */ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL); val &= ~BIT(0); @@ -680,34 +721,6 @@ static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie) writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2); return 0; - -err_slave_clk: - clk_disable_unprepare(res->master_clk); -err_master_clk: - clk_disable_unprepare(res->cfg_clk); -err_cfg_clk: - clk_disable_unprepare(res->aux_clk); - -err_aux_clk: - regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); - - return ret; -} - -static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie) -{ - struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2; - struct dw_pcie *pci = pcie->pci; - struct device *dev = pci->dev; - int ret; - - ret = clk_prepare_enable(res->pipe_clk); - if (ret) { - dev_err(dev, "cannot prepare/enable pipe clock\n"); - return ret; - } - - return 0; } static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie) @@ -814,7 +827,6 @@ static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; - u32 val; int ret; ret = reset_control_assert(res->axi_m_reset); @@ -939,6 +951,33 @@ static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie) if (ret) goto err_clks; + return 0; + +err_clks: + reset_control_assert(res->ahb_reset); +err_rst_ahb: + reset_control_assert(res->pwr_reset); +err_rst_pwr: + reset_control_assert(res->axi_s_reset); +err_rst_axi_s: + reset_control_assert(res->axi_m_sticky_reset); +err_rst_axi_m_sticky: + reset_control_assert(res->axi_m_reset); +err_rst_axi_m: + reset_control_assert(res->pipe_sticky_reset); +err_rst_pipe_sticky: + reset_control_assert(res->pipe_reset); +err_rst_pipe: + reset_control_assert(res->phy_reset); +err_rst_phy: + reset_control_assert(res->phy_ahb_reset); + return ret; +} + +static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie) +{ + u32 val; + /* enable PCIe clocks and resets */ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL); val &= ~BIT(0); @@ -961,26 +1000,6 @@ static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie) writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2); return 0; - -err_clks: - reset_control_assert(res->ahb_reset); -err_rst_ahb: - reset_control_assert(res->pwr_reset); -err_rst_pwr: - reset_control_assert(res->axi_s_reset); -err_rst_axi_s: - reset_control_assert(res->axi_m_sticky_reset); -err_rst_axi_m_sticky: - reset_control_assert(res->axi_m_reset); -err_rst_axi_m: - reset_control_assert(res->pipe_sticky_reset); -err_rst_pipe_sticky: - reset_control_assert(res->pipe_reset); -err_rst_pipe: - reset_control_assert(res->phy_reset); -err_rst_phy: - reset_control_assert(res->phy_ahb_reset); - return ret; } static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie) @@ -1038,9 +1057,7 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; - u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); int i, ret; - u32 val; for (i = 0; i < ARRAY_SIZE(res->rst); i++) { ret = reset_control_assert(res->rst[i]); @@ -1097,6 +1114,33 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie) goto err_clk_aux; } + return 0; + +err_clk_aux: + clk_disable_unprepare(res->ahb_clk); +err_clk_ahb: + clk_disable_unprepare(res->axi_s_clk); +err_clk_axi_s: + clk_disable_unprepare(res->axi_m_clk); +err_clk_axi_m: + clk_disable_unprepare(res->iface); +err_clk_iface: + /* + * Not checking for failure, will anyway return + * the original failure in 'ret'. + */ + for (i = 0; i < ARRAY_SIZE(res->rst); i++) + reset_control_assert(res->rst[i]); + + return ret; +} + +static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie) +{ + struct dw_pcie *pci = pcie->pci; + u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); + u32 val; + writel(SLV_ADDR_SPACE_SZ, pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE); @@ -1114,7 +1158,7 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie) writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND); writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG); - writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP); + writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP); val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP); val &= ~PCI_EXP_LNKCAP_ASPMS; @@ -1124,24 +1168,6 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie) PCI_EXP_DEVCTL2); return 0; - -err_clk_aux: - clk_disable_unprepare(res->ahb_clk); -err_clk_ahb: - clk_disable_unprepare(res->axi_s_clk); -err_clk_axi_s: - clk_disable_unprepare(res->axi_m_clk); -err_clk_axi_m: - clk_disable_unprepare(res->iface); -err_clk_iface: - /* - * Not checking for failure, will anyway return - * the original failure in 'ret'. - */ - for (i = 0; i < ARRAY_SIZE(res->rst); i++) - reset_control_assert(res->rst[i]); - - return ret; } static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie) @@ -1184,22 +1210,7 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie) if (ret < 0) return ret; - if (pcie->cfg->pipe_clk_need_muxing) { - res->pipe_clk_src = devm_clk_get(dev, "pipe_mux"); - if (IS_ERR(res->pipe_clk_src)) - return PTR_ERR(res->pipe_clk_src); - - res->phy_pipe_clk = devm_clk_get(dev, "phy_pipe"); - if (IS_ERR(res->phy_pipe_clk)) - return PTR_ERR(res->phy_pipe_clk); - - res->ref_clk_src = devm_clk_get(dev, "ref"); - if (IS_ERR(res->ref_clk_src)) - return PTR_ERR(res->ref_clk_src); - } - - res->pipe_clk = devm_clk_get(dev, "pipe"); - return PTR_ERR_OR_ZERO(res->pipe_clk); + return 0; } static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) @@ -1216,10 +1227,6 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) return ret; } - /* Set TCXO as clock source for pcie_pipe_clk_src */ - if (pcie->cfg->pipe_clk_need_muxing) - clk_set_parent(res->pipe_clk_src, res->ref_clk_src); - ret = clk_bulk_prepare_enable(res->num_clks, res->clks); if (ret < 0) goto err_disable_regulators; @@ -1261,6 +1268,11 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) val |= BIT(4); writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL); + /* Enable L1 and L1SS */ + val = readl(pcie->parf + PCIE20_PARF_PM_CTRL); + val &= ~REQ_NOT_ENTR_L1; + writel(val, pcie->parf + PCIE20_PARF_PM_CTRL); + if (IS_ENABLED(CONFIG_PCI_MSI)) { val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); val |= BIT(31); @@ -1281,25 +1293,114 @@ static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; clk_bulk_disable_unprepare(res->num_clks, res->clks); + regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); } -static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie) +static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie) { - struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; + struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0; + struct dw_pcie *pci = pcie->pci; + struct device *dev = pci->dev; + int ret; - /* Set pipe clock as clock source for pcie_pipe_clk_src */ - if (pcie->cfg->pipe_clk_need_muxing) - clk_set_parent(res->pipe_clk_src, res->phy_pipe_clk); + res->clks[0].id = "iface"; + res->clks[1].id = "axi_m"; + res->clks[2].id = "axi_s"; + res->clks[3].id = "axi_bridge"; + res->clks[4].id = "rchng"; + + ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks); + if (ret < 0) + return ret; + + res->rst = devm_reset_control_array_get_exclusive(dev); + if (IS_ERR(res->rst)) + return PTR_ERR(res->rst); - return clk_prepare_enable(res->pipe_clk); + return 0; } -static void qcom_pcie_post_deinit_2_7_0(struct qcom_pcie *pcie) +static void qcom_pcie_deinit_2_9_0(struct qcom_pcie *pcie) { - struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; + struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0; + + clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); +} + +static int qcom_pcie_init_2_9_0(struct qcom_pcie *pcie) +{ + struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0; + struct device *dev = pcie->pci->dev; + int ret; + + ret = reset_control_assert(res->rst); + if (ret) { + dev_err(dev, "reset assert failed (%d)\n", ret); + return ret; + } + + /* + * Delay periods before and after reset deassert are working values + * from downstream Codeaurora kernel + */ + usleep_range(2000, 2500); + + ret = reset_control_deassert(res->rst); + if (ret) { + dev_err(dev, "reset deassert failed (%d)\n", ret); + return ret; + } + + usleep_range(2000, 2500); - clk_disable_unprepare(res->pipe_clk); + return clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks); +} + +static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie) +{ + struct dw_pcie *pci = pcie->pci; + u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); + u32 val; + int i; + + writel(SLV_ADDR_SPACE_SZ, + pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE); + + val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL); + val &= ~BIT(0); + writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL); + + writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR); + + writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE); + writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN, + pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL); + writel(GEN3_RELATED_OFF_RXEQ_RGRDLESS_RXTS | + GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL, + pci->dbi_base + GEN3_RELATED_OFF); + + writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS | + SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS | + AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS, + pcie->parf + PCIE20_PARF_SYS_CTRL); + + writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH); + + dw_pcie_dbi_ro_wr_en(pci); + writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP); + + val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP); + val &= ~PCI_EXP_LNKCAP_ASPMS; + writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP); + + writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + + PCI_EXP_DEVCTL2); + + for (i = 0; i < 256; i++) + writel(0, pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N + (4 * i)); + + return 0; } static int qcom_pcie_link_up(struct dw_pcie *pci) @@ -1381,7 +1482,7 @@ static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie) return 0; } -static int qcom_pcie_host_init(struct pcie_port *pp) +static int qcom_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct qcom_pcie *pcie = to_qcom_pcie(pci); @@ -1433,6 +1534,7 @@ static const struct dw_pcie_host_ops qcom_pcie_dw_ops = { static const struct qcom_pcie_ops ops_2_1_0 = { .get_resources = qcom_pcie_get_resources_2_1_0, .init = qcom_pcie_init_2_1_0, + .post_init = qcom_pcie_post_init_2_1_0, .deinit = qcom_pcie_deinit_2_1_0, .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable, }; @@ -1441,6 +1543,7 @@ static const struct qcom_pcie_ops ops_2_1_0 = { static const struct qcom_pcie_ops ops_1_0_0 = { .get_resources = qcom_pcie_get_resources_1_0_0, .init = qcom_pcie_init_1_0_0, + .post_init = qcom_pcie_post_init_1_0_0, .deinit = qcom_pcie_deinit_1_0_0, .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable, }; @@ -1451,7 +1554,6 @@ static const struct qcom_pcie_ops ops_2_3_2 = { .init = qcom_pcie_init_2_3_2, .post_init = qcom_pcie_post_init_2_3_2, .deinit = qcom_pcie_deinit_2_3_2, - .post_deinit = qcom_pcie_post_deinit_2_3_2, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, }; @@ -1459,6 +1561,7 @@ static const struct qcom_pcie_ops ops_2_3_2 = { static const struct qcom_pcie_ops ops_2_4_0 = { .get_resources = qcom_pcie_get_resources_2_4_0, .init = qcom_pcie_init_2_4_0, + .post_init = qcom_pcie_post_init_2_4_0, .deinit = qcom_pcie_deinit_2_4_0, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, }; @@ -1467,6 +1570,7 @@ static const struct qcom_pcie_ops ops_2_4_0 = { static const struct qcom_pcie_ops ops_2_3_3 = { .get_resources = qcom_pcie_get_resources_2_3_3, .init = qcom_pcie_init_2_3_3, + .post_init = qcom_pcie_post_init_2_3_3, .deinit = qcom_pcie_deinit_2_3_3, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, }; @@ -1477,8 +1581,6 @@ static const struct qcom_pcie_ops ops_2_7_0 = { .init = qcom_pcie_init_2_7_0, .deinit = qcom_pcie_deinit_2_7_0, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, - .post_init = qcom_pcie_post_init_2_7_0, - .post_deinit = qcom_pcie_post_deinit_2_7_0, }; /* Qcom IP rev.: 1.9.0 */ @@ -1487,11 +1589,18 @@ static const struct qcom_pcie_ops ops_1_9_0 = { .init = qcom_pcie_init_2_7_0, .deinit = qcom_pcie_deinit_2_7_0, .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, - .post_init = qcom_pcie_post_init_2_7_0, - .post_deinit = qcom_pcie_post_deinit_2_7_0, .config_sid = qcom_pcie_config_sid_sm8250, }; +/* Qcom IP rev.: 2.9.0 Synopsys IP rev.: 5.00a */ +static const struct qcom_pcie_ops ops_2_9_0 = { + .get_resources = qcom_pcie_get_resources_2_9_0, + .init = qcom_pcie_init_2_9_0, + .post_init = qcom_pcie_post_init_2_9_0, + .deinit = qcom_pcie_deinit_2_9_0, + .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, +}; + static const struct qcom_pcie_cfg apq8084_cfg = { .ops = &ops_1_0_0, }; @@ -1533,7 +1642,6 @@ static const struct qcom_pcie_cfg sm8250_cfg = { static const struct qcom_pcie_cfg sm8450_pcie0_cfg = { .ops = &ops_1_9_0, .has_ddrss_sf_tbu_clk = true, - .pipe_clk_need_muxing = true, .has_aggre0_clk = true, .has_aggre1_clk = true, }; @@ -1541,14 +1649,12 @@ static const struct qcom_pcie_cfg sm8450_pcie0_cfg = { static const struct qcom_pcie_cfg sm8450_pcie1_cfg = { .ops = &ops_1_9_0, .has_ddrss_sf_tbu_clk = true, - .pipe_clk_need_muxing = true, .has_aggre1_clk = true, }; static const struct qcom_pcie_cfg sc7280_cfg = { .ops = &ops_1_9_0, .has_tbu_clk = true, - .pipe_clk_need_muxing = true, }; static const struct qcom_pcie_cfg sc8180x_cfg = { @@ -1556,6 +1662,10 @@ static const struct qcom_pcie_cfg sc8180x_cfg = { .has_tbu_clk = true, }; +static const struct qcom_pcie_cfg ipq6018_cfg = { + .ops = &ops_2_9_0, +}; + static const struct dw_pcie_ops dw_pcie_ops = { .link_up = qcom_pcie_link_up, .start_link = qcom_pcie_start_link, @@ -1564,7 +1674,7 @@ static const struct dw_pcie_ops dw_pcie_ops = { static int qcom_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct pcie_port *pp; + struct dw_pcie_rp *pp; struct dw_pcie *pci; struct qcom_pcie *pcie; const struct qcom_pcie_cfg *pcie_cfg; @@ -1666,6 +1776,7 @@ static const struct of_device_id qcom_pcie_match[] = { { .compatible = "qcom,pcie-sm8450-pcie0", .data = &sm8450_pcie0_cfg }, { .compatible = "qcom,pcie-sm8450-pcie1", .data = &sm8450_pcie1_cfg }, { .compatible = "qcom,pcie-sc7280", .data = &sc7280_cfg }, + { .compatible = "qcom,pcie-ipq6018", .data = &ipq6018_cfg }, { } }; diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c index 1569e82b5568..99d47ae80331 100644 --- a/drivers/pci/controller/dwc/pcie-spear13xx.c +++ b/drivers/pci/controller/dwc/pcie-spear13xx.c @@ -85,7 +85,7 @@ static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg) struct spear13xx_pcie *spear13xx_pcie = arg; struct pcie_app_reg __iomem *app_reg = spear13xx_pcie->app_base; struct dw_pcie *pci = spear13xx_pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; unsigned int status; status = readl(&app_reg->int_sts); @@ -121,7 +121,7 @@ static int spear13xx_pcie_link_up(struct dw_pcie *pci) return 0; } -static int spear13xx_pcie_host_init(struct pcie_port *pp) +static int spear13xx_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci); @@ -155,7 +155,7 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie, struct platform_device *pdev) { struct dw_pcie *pci = spear13xx_pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; struct device *dev = &pdev->dev; int ret; @@ -172,7 +172,7 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie, } pp->ops = &spear13xx_pcie_host_ops; - pp->msi_irq = -ENODEV; + pp->msi_irq[0] = -ENODEV; ret = dw_pcie_host_init(pp); if (ret) { @@ -258,7 +258,7 @@ static struct platform_driver spear13xx_pcie_driver = { .probe = spear13xx_pcie_probe, .driver = { .name = "spear-pcie", - .of_match_table = of_match_ptr(spear13xx_pcie_of_match), + .of_match_table = spear13xx_pcie_of_match, .suppress_bind_attrs = true, }, }; diff --git a/drivers/pci/controller/dwc/pcie-tegra194-acpi.c b/drivers/pci/controller/dwc/pcie-tegra194-acpi.c index c2de6ed4d86f..55f61914a986 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194-acpi.c +++ b/drivers/pci/controller/dwc/pcie-tegra194-acpi.c @@ -39,7 +39,8 @@ static int tegra194_acpi_init(struct pci_config_window *cfg) static void atu_reg_write(struct tegra194_pcie_ecam *pcie_ecam, int index, u32 val, u32 reg) { - u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index); + u32 offset = PCIE_ATU_UNROLL_BASE(PCIE_ATU_REGION_DIR_OB, index) + + PCIE_ATU_VIEWPORT_BASE; writel(val, pcie_ecam->iatu_base + offset + reg); } @@ -58,8 +59,8 @@ static void program_outbound_atu(struct tegra194_pcie_ecam *pcie_ecam, PCIE_ATU_LIMIT); atu_reg_write(pcie_ecam, index, upper_32_bits(pci_addr), PCIE_ATU_UPPER_TARGET); - atu_reg_write(pcie_ecam, index, type, PCIE_ATU_CR1); - atu_reg_write(pcie_ecam, index, PCIE_ATU_ENABLE, PCIE_ATU_CR2); + atu_reg_write(pcie_ecam, index, type, PCIE_ATU_REGION_CTRL1); + atu_reg_write(pcie_ecam, index, PCIE_ATU_ENABLE, PCIE_ATU_REGION_CTRL2); } static void __iomem *tegra194_map_bus(struct pci_bus *bus, diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index cc2678490162..1b6b437823d2 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1,8 +1,10 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * PCIe host controller driver for Tegra194 SoC + * PCIe host controller driver for the following SoCs + * Tegra194 + * Tegra234 * - * Copyright (C) 2019 NVIDIA Corporation. + * Copyright (C) 2019-2022 NVIDIA Corporation. * * Author: Vidya Sagar <vidyas@nvidia.com> */ @@ -35,6 +37,9 @@ #include <soc/tegra/bpmp-abi.h> #include "../../pci.h" +#define TEGRA194_DWC_IP_VER 0x490A +#define TEGRA234_DWC_IP_VER 0x562A + #define APPL_PINMUX 0x0 #define APPL_PINMUX_PEX_RST BIT(0) #define APPL_PINMUX_CLKREQ_OVERRIDE_EN BIT(2) @@ -49,6 +54,7 @@ #define APPL_CTRL_HW_HOT_RST_MODE_MASK GENMASK(1, 0) #define APPL_CTRL_HW_HOT_RST_MODE_SHIFT 22 #define APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST 0x1 +#define APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST_LTSSM_EN 0x2 #define APPL_INTR_EN_L0_0 0x8 #define APPL_INTR_EN_L0_0_LINK_STATE_INT_EN BIT(0) @@ -170,19 +176,6 @@ #define CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF 0x718 #define CFG_TIMER_CTRL_ACK_NAK_SHIFT (19) -#define EVENT_COUNTER_ALL_CLEAR 0x3 -#define EVENT_COUNTER_ENABLE_ALL 0x7 -#define EVENT_COUNTER_ENABLE_SHIFT 2 -#define EVENT_COUNTER_EVENT_SEL_MASK GENMASK(7, 0) -#define EVENT_COUNTER_EVENT_SEL_SHIFT 16 -#define EVENT_COUNTER_EVENT_Tx_L0S 0x2 -#define EVENT_COUNTER_EVENT_Rx_L0S 0x3 -#define EVENT_COUNTER_EVENT_L1 0x5 -#define EVENT_COUNTER_EVENT_L1_1 0x7 -#define EVENT_COUNTER_EVENT_L1_2 0x8 -#define EVENT_COUNTER_GROUP_SEL_SHIFT 24 -#define EVENT_COUNTER_GROUP_5 0x5 - #define N_FTS_VAL 52 #define FTS_VAL 52 @@ -191,12 +184,6 @@ #define GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_MASK GENMASK(23, 8) #define GEN3_EQ_CONTROL_OFF_FB_MODE_MASK GENMASK(3, 0) -#define GEN3_RELATED_OFF 0x890 -#define GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL BIT(0) -#define GEN3_RELATED_OFF_GEN3_EQ_DISABLE BIT(16) -#define GEN3_RELATED_OFF_RATE_SHADOW_SEL_SHIFT 24 -#define GEN3_RELATED_OFF_RATE_SHADOW_SEL_MASK GENMASK(25, 24) - #define PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT 0x8D0 #define AMBA_ERROR_RESPONSE_CRS_SHIFT 3 #define AMBA_ERROR_RESPONSE_CRS_MASK GENMASK(1, 0) @@ -243,7 +230,19 @@ static const unsigned int pcie_gen_freq[] = { GEN4_CORE_CLK_FREQ }; -struct tegra194_pcie { +struct tegra_pcie_dw_of_data { + u32 version; + enum dw_pcie_device_mode mode; + bool has_msix_doorbell_access_fix; + bool has_sbr_reset_fix; + bool has_l1ss_exit_fix; + bool has_ltr_req_fix; + u32 cdm_chk_int_en_bit; + u32 gen4_preset_vec; + u8 n_fts[2]; +}; + +struct tegra_pcie_dw { struct device *dev; struct resource *appl_res; struct resource *dbi_res; @@ -255,17 +254,20 @@ struct tegra194_pcie { struct dw_pcie pci; struct tegra_bpmp *bpmp; - enum dw_pcie_device_mode mode; + struct tegra_pcie_dw_of_data *of_data; bool supports_clkreq; bool enable_cdm_check; + bool enable_srns; bool link_state; bool update_fc_fixup; + bool enable_ext_refclk; u8 init_link_width; u32 msi_ctrl_int; u32 num_lanes; u32 cid; u32 cfg_link_cap_l1sub; + u32 ras_des_cap; u32 pcie_cap_base; u32 aspm_cmrt; u32 aspm_pwr_on_t; @@ -287,22 +289,18 @@ struct tegra194_pcie { int ep_state; }; -struct tegra194_pcie_of_data { - enum dw_pcie_device_mode mode; -}; - -static inline struct tegra194_pcie *to_tegra_pcie(struct dw_pcie *pci) +static inline struct tegra_pcie_dw *to_tegra_pcie(struct dw_pcie *pci) { - return container_of(pci, struct tegra194_pcie, pci); + return container_of(pci, struct tegra_pcie_dw, pci); } -static inline void appl_writel(struct tegra194_pcie *pcie, const u32 value, +static inline void appl_writel(struct tegra_pcie_dw *pcie, const u32 value, const u32 reg) { writel_relaxed(value, pcie->appl_base + reg); } -static inline u32 appl_readl(struct tegra194_pcie *pcie, const u32 reg) +static inline u32 appl_readl(struct tegra_pcie_dw *pcie, const u32 reg) { return readl_relaxed(pcie->appl_base + reg); } @@ -311,10 +309,10 @@ struct tegra_pcie_soc { enum dw_pcie_device_mode mode; }; -static void apply_bad_link_workaround(struct pcie_port *pp) +static void apply_bad_link_workaround(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); u32 current_link_width; u16 val; @@ -347,18 +345,18 @@ static void apply_bad_link_workaround(struct pcie_port *pp) static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg) { - struct tegra194_pcie *pcie = arg; + struct tegra_pcie_dw *pcie = arg; struct dw_pcie *pci = &pcie->pci; - struct pcie_port *pp = &pci->pp; - u32 val, tmp; + struct dw_pcie_rp *pp = &pci->pp; + u32 val, status_l0, status_l1; u16 val_w; - val = appl_readl(pcie, APPL_INTR_STATUS_L0); - if (val & APPL_INTR_STATUS_L0_LINK_STATE_INT) { - val = appl_readl(pcie, APPL_INTR_STATUS_L1_0_0); - if (val & APPL_INTR_STATUS_L1_0_0_LINK_REQ_RST_NOT_CHGED) { - appl_writel(pcie, val, APPL_INTR_STATUS_L1_0_0); - + status_l0 = appl_readl(pcie, APPL_INTR_STATUS_L0); + if (status_l0 & APPL_INTR_STATUS_L0_LINK_STATE_INT) { + status_l1 = appl_readl(pcie, APPL_INTR_STATUS_L1_0_0); + appl_writel(pcie, status_l1, APPL_INTR_STATUS_L1_0_0); + if (!pcie->of_data->has_sbr_reset_fix && + status_l1 & APPL_INTR_STATUS_L1_0_0_LINK_REQ_RST_NOT_CHGED) { /* SBR & Surprise Link Down WAR */ val = appl_readl(pcie, APPL_CAR_RESET_OVRD); val &= ~APPL_CAR_RESET_OVRD_CYA_OVERRIDE_CORE_RST_N; @@ -374,15 +372,21 @@ static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg) } } - if (val & APPL_INTR_STATUS_L0_INT_INT) { - val = appl_readl(pcie, APPL_INTR_STATUS_L1_8_0); - if (val & APPL_INTR_STATUS_L1_8_0_AUTO_BW_INT_STS) { + if (status_l0 & APPL_INTR_STATUS_L0_INT_INT) { + status_l1 = appl_readl(pcie, APPL_INTR_STATUS_L1_8_0); + if (status_l1 & APPL_INTR_STATUS_L1_8_0_AUTO_BW_INT_STS) { appl_writel(pcie, APPL_INTR_STATUS_L1_8_0_AUTO_BW_INT_STS, APPL_INTR_STATUS_L1_8_0); apply_bad_link_workaround(pp); } - if (val & APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS) { + if (status_l1 & APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS) { + val_w = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + + PCI_EXP_LNKSTA); + val_w |= PCI_EXP_LNKSTA_LBMS; + dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + + PCI_EXP_LNKSTA, val_w); + appl_writel(pcie, APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS, APPL_INTR_STATUS_L1_8_0); @@ -394,31 +398,30 @@ static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg) } } - val = appl_readl(pcie, APPL_INTR_STATUS_L0); - if (val & APPL_INTR_STATUS_L0_CDM_REG_CHK_INT) { - val = appl_readl(pcie, APPL_INTR_STATUS_L1_18); - tmp = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS); - if (val & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMPLT) { + if (status_l0 & APPL_INTR_STATUS_L0_CDM_REG_CHK_INT) { + status_l1 = appl_readl(pcie, APPL_INTR_STATUS_L1_18); + val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS); + if (status_l1 & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMPLT) { dev_info(pci->dev, "CDM check complete\n"); - tmp |= PCIE_PL_CHK_REG_CHK_REG_COMPLETE; + val |= PCIE_PL_CHK_REG_CHK_REG_COMPLETE; } - if (val & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMP_ERR) { + if (status_l1 & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMP_ERR) { dev_err(pci->dev, "CDM comparison mismatch\n"); - tmp |= PCIE_PL_CHK_REG_CHK_REG_COMPARISON_ERROR; + val |= PCIE_PL_CHK_REG_CHK_REG_COMPARISON_ERROR; } - if (val & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_LOGIC_ERR) { + if (status_l1 & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_LOGIC_ERR) { dev_err(pci->dev, "CDM Logic error\n"); - tmp |= PCIE_PL_CHK_REG_CHK_REG_LOGIC_ERROR; + val |= PCIE_PL_CHK_REG_CHK_REG_LOGIC_ERROR; } - dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, tmp); - tmp = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_ERR_ADDR); - dev_err(pci->dev, "CDM Error Address Offset = 0x%08X\n", tmp); + dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val); + val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_ERR_ADDR); + dev_err(pci->dev, "CDM Error Address Offset = 0x%08X\n", val); } return IRQ_HANDLED; } -static void pex_ep_event_hot_rst_done(struct tegra194_pcie *pcie) +static void pex_ep_event_hot_rst_done(struct tegra_pcie_dw *pcie) { u32 val; @@ -446,7 +449,7 @@ static void pex_ep_event_hot_rst_done(struct tegra194_pcie *pcie) static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg) { - struct tegra194_pcie *pcie = arg; + struct tegra_pcie_dw *pcie = arg; struct dw_pcie *pci = &pcie->pci; u32 val, speed; @@ -454,6 +457,9 @@ static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg) PCI_EXP_LNKSTA_CLS; clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]); + if (pcie->of_data->has_ltr_req_fix) + return IRQ_HANDLED; + /* If EP doesn't advertise L1SS, just return */ val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub); if (!(val & (PCI_L1SS_CAP_ASPM_L1_1 | PCI_L1SS_CAP_ASPM_L1_2))) @@ -492,7 +498,7 @@ static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg) static irqreturn_t tegra_pcie_ep_hard_irq(int irq, void *arg) { - struct tegra194_pcie *pcie = arg; + struct tegra_pcie_dw *pcie = arg; struct dw_pcie_ep *ep = &pcie->pci.ep; int spurious = 1; u32 status_l0, status_l1, link_status; @@ -535,16 +541,21 @@ static irqreturn_t tegra_pcie_ep_hard_irq(int irq, void *arg) return IRQ_HANDLED; } -static int tegra194_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn, int where, +static int tegra_pcie_dw_rd_own_conf(struct pci_bus *bus, u32 devfn, int where, int size, u32 *val) { + struct dw_pcie_rp *pp = bus->sysdata; + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); + /* * This is an endpoint mode specific register happen to appear even * when controller is operating in root port mode and system hangs * when it is accessed with link being in ASPM-L1 state. * So skip accessing it altogether */ - if (!PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) { + if (!pcie->of_data->has_msix_doorbell_access_fix && + !PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) { *val = 0x00000000; return PCIBIOS_SUCCESSFUL; } @@ -552,16 +563,21 @@ static int tegra194_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn, int where, return pci_generic_config_read(bus, devfn, where, size, val); } -static int tegra194_pcie_wr_own_conf(struct pci_bus *bus, u32 devfn, int where, +static int tegra_pcie_dw_wr_own_conf(struct pci_bus *bus, u32 devfn, int where, int size, u32 val) { + struct dw_pcie_rp *pp = bus->sysdata; + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); + /* * This is an endpoint mode specific register happen to appear even * when controller is operating in root port mode and system hangs * when it is accessed with link being in ASPM-L1 state. * So skip accessing it altogether */ - if (!PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) + if (!pcie->of_data->has_msix_doorbell_access_fix && + !PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) return PCIBIOS_SUCCESSFUL; return pci_generic_config_write(bus, devfn, where, size, val); @@ -569,30 +585,12 @@ static int tegra194_pcie_wr_own_conf(struct pci_bus *bus, u32 devfn, int where, static struct pci_ops tegra_pci_ops = { .map_bus = dw_pcie_own_conf_map_bus, - .read = tegra194_pcie_rd_own_conf, - .write = tegra194_pcie_wr_own_conf, + .read = tegra_pcie_dw_rd_own_conf, + .write = tegra_pcie_dw_wr_own_conf, }; #if defined(CONFIG_PCIEASPM) -static const u32 event_cntr_ctrl_offset[] = { - 0x1d8, - 0x1a8, - 0x1a8, - 0x1a8, - 0x1c4, - 0x1d8 -}; - -static const u32 event_cntr_data_offset[] = { - 0x1dc, - 0x1ac, - 0x1ac, - 0x1ac, - 0x1c8, - 0x1dc -}; - -static void disable_aspm_l11(struct tegra194_pcie *pcie) +static void disable_aspm_l11(struct tegra_pcie_dw *pcie) { u32 val; @@ -601,7 +599,7 @@ static void disable_aspm_l11(struct tegra194_pcie *pcie) dw_pcie_writel_dbi(&pcie->pci, pcie->cfg_link_cap_l1sub, val); } -static void disable_aspm_l12(struct tegra194_pcie *pcie) +static void disable_aspm_l12(struct tegra_pcie_dw *pcie) { u32 val; @@ -610,24 +608,27 @@ static void disable_aspm_l12(struct tegra194_pcie *pcie) dw_pcie_writel_dbi(&pcie->pci, pcie->cfg_link_cap_l1sub, val); } -static inline u32 event_counter_prog(struct tegra194_pcie *pcie, u32 event) +static inline u32 event_counter_prog(struct tegra_pcie_dw *pcie, u32 event) { u32 val; - val = dw_pcie_readl_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid]); + val = dw_pcie_readl_dbi(&pcie->pci, pcie->ras_des_cap + + PCIE_RAS_DES_EVENT_COUNTER_CONTROL); val &= ~(EVENT_COUNTER_EVENT_SEL_MASK << EVENT_COUNTER_EVENT_SEL_SHIFT); val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT; val |= event << EVENT_COUNTER_EVENT_SEL_SHIFT; val |= EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT; - dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], val); - val = dw_pcie_readl_dbi(&pcie->pci, event_cntr_data_offset[pcie->cid]); + dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap + + PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val); + val = dw_pcie_readl_dbi(&pcie->pci, pcie->ras_des_cap + + PCIE_RAS_DES_EVENT_COUNTER_DATA); return val; } static int aspm_state_cnt(struct seq_file *s, void *data) { - struct tegra194_pcie *pcie = (struct tegra194_pcie *) + struct tegra_pcie_dw *pcie = (struct tegra_pcie_dw *) dev_get_drvdata(s->private); u32 val; @@ -647,18 +648,20 @@ static int aspm_state_cnt(struct seq_file *s, void *data) event_counter_prog(pcie, EVENT_COUNTER_EVENT_L1_2)); /* Clear all counters */ - dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], + dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap + + PCIE_RAS_DES_EVENT_COUNTER_CONTROL, EVENT_COUNTER_ALL_CLEAR); /* Re-enable counting */ val = EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT; val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT; - dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], val); + dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap + + PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val); return 0; } -static void init_host_aspm(struct tegra194_pcie *pcie) +static void init_host_aspm(struct tegra_pcie_dw *pcie) { struct dw_pcie *pci = &pcie->pci; u32 val; @@ -666,10 +669,14 @@ static void init_host_aspm(struct tegra194_pcie *pcie) val = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_L1SS); pcie->cfg_link_cap_l1sub = val + PCI_L1SS_CAP; + pcie->ras_des_cap = dw_pcie_find_ext_capability(&pcie->pci, + PCI_EXT_CAP_ID_VNDR); + /* Enable ASPM counters */ val = EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT; val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT; - dw_pcie_writel_dbi(pci, event_cntr_ctrl_offset[pcie->cid], val); + dw_pcie_writel_dbi(pci, pcie->ras_des_cap + + PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val); /* Program T_cmrt and T_pwr_on values */ val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub); @@ -686,22 +693,22 @@ static void init_host_aspm(struct tegra194_pcie *pcie) dw_pcie_writel_dbi(pci, PCIE_PORT_AFR, val); } -static void init_debugfs(struct tegra194_pcie *pcie) +static void init_debugfs(struct tegra_pcie_dw *pcie) { debugfs_create_devm_seqfile(pcie->dev, "aspm_state_cnt", pcie->debugfs, aspm_state_cnt); } #else -static inline void disable_aspm_l12(struct tegra194_pcie *pcie) { return; } -static inline void disable_aspm_l11(struct tegra194_pcie *pcie) { return; } -static inline void init_host_aspm(struct tegra194_pcie *pcie) { return; } -static inline void init_debugfs(struct tegra194_pcie *pcie) { return; } +static inline void disable_aspm_l12(struct tegra_pcie_dw *pcie) { return; } +static inline void disable_aspm_l11(struct tegra_pcie_dw *pcie) { return; } +static inline void init_host_aspm(struct tegra_pcie_dw *pcie) { return; } +static inline void init_debugfs(struct tegra_pcie_dw *pcie) { return; } #endif -static void tegra_pcie_enable_system_interrupts(struct pcie_port *pp) +static void tegra_pcie_enable_system_interrupts(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); u32 val; u16 val_w; @@ -709,13 +716,15 @@ static void tegra_pcie_enable_system_interrupts(struct pcie_port *pp) val |= APPL_INTR_EN_L0_0_LINK_STATE_INT_EN; appl_writel(pcie, val, APPL_INTR_EN_L0_0); - val = appl_readl(pcie, APPL_INTR_EN_L1_0_0); - val |= APPL_INTR_EN_L1_0_0_LINK_REQ_RST_NOT_INT_EN; - appl_writel(pcie, val, APPL_INTR_EN_L1_0_0); + if (!pcie->of_data->has_sbr_reset_fix) { + val = appl_readl(pcie, APPL_INTR_EN_L1_0_0); + val |= APPL_INTR_EN_L1_0_0_LINK_REQ_RST_NOT_INT_EN; + appl_writel(pcie, val, APPL_INTR_EN_L1_0_0); + } if (pcie->enable_cdm_check) { val = appl_readl(pcie, APPL_INTR_EN_L0_0); - val |= APPL_INTR_EN_L0_0_CDM_REG_CHK_INT_EN; + val |= pcie->of_data->cdm_chk_int_en_bit; appl_writel(pcie, val, APPL_INTR_EN_L0_0); val = appl_readl(pcie, APPL_INTR_EN_L1_18); @@ -736,10 +745,10 @@ static void tegra_pcie_enable_system_interrupts(struct pcie_port *pp) val_w); } -static void tegra_pcie_enable_legacy_interrupts(struct pcie_port *pp) +static void tegra_pcie_enable_legacy_interrupts(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); u32 val; /* Enable legacy interrupt generation */ @@ -757,10 +766,10 @@ static void tegra_pcie_enable_legacy_interrupts(struct pcie_port *pp) appl_writel(pcie, val, APPL_INTR_EN_L1_8_0); } -static void tegra_pcie_enable_msi_interrupts(struct pcie_port *pp) +static void tegra_pcie_enable_msi_interrupts(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); u32 val; /* Enable MSI interrupt generation */ @@ -770,10 +779,10 @@ static void tegra_pcie_enable_msi_interrupts(struct pcie_port *pp) appl_writel(pcie, val, APPL_INTR_EN_L0_0); } -static void tegra_pcie_enable_interrupts(struct pcie_port *pp) +static void tegra_pcie_enable_interrupts(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); /* Clear interrupt statuses before enabling interrupts */ appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0); @@ -798,7 +807,7 @@ static void tegra_pcie_enable_interrupts(struct pcie_port *pp) tegra_pcie_enable_msi_interrupts(pp); } -static void config_gen3_gen4_eq_presets(struct tegra194_pcie *pcie) +static void config_gen3_gen4_eq_presets(struct tegra_pcie_dw *pcie) { struct dw_pcie *pci = &pcie->pci; u32 val, offset, i; @@ -842,7 +851,8 @@ static void config_gen3_gen4_eq_presets(struct tegra194_pcie *pcie) val = dw_pcie_readl_dbi(pci, GEN3_EQ_CONTROL_OFF); val &= ~GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_MASK; - val |= (0x360 << GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_SHIFT); + val |= (pcie->of_data->gen4_preset_vec << + GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_SHIFT); val &= ~GEN3_EQ_CONTROL_OFF_FB_MODE_MASK; dw_pcie_writel_dbi(pci, GEN3_EQ_CONTROL_OFF, val); @@ -851,11 +861,12 @@ static void config_gen3_gen4_eq_presets(struct tegra194_pcie *pcie) dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val); } -static int tegra194_pcie_host_init(struct pcie_port *pp) +static int tegra_pcie_dw_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); u32 val; + u16 val_16; pp->bridge->ops = &tegra_pci_ops; @@ -863,6 +874,11 @@ static int tegra194_pcie_host_init(struct pcie_port *pp) pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci, PCI_CAP_ID_EXP); + val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL); + val_16 &= ~PCI_EXP_DEVCTL_PAYLOAD; + val_16 |= PCI_EXP_DEVCTL_PAYLOAD_256B; + dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL, val_16); + val = dw_pcie_readl_dbi(pci, PCI_IO_BASE); val &= ~(IO_BASE_IO_DECODE | IO_BASE_IO_DECODE_BIT8); dw_pcie_writel_dbi(pci, PCI_IO_BASE, val); @@ -887,6 +903,15 @@ static int tegra194_pcie_host_init(struct pcie_port *pp) val |= (pcie->num_lanes << PCI_EXP_LNKSTA_NLW_SHIFT); dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP, val); + /* Clear Slot Clock Configuration bit if SRNS configuration */ + if (pcie->enable_srns) { + val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + + PCI_EXP_LNKSTA); + val_16 &= ~PCI_EXP_LNKSTA_SLC; + dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA, + val_16); + } + config_gen3_gen4_eq_presets(pcie); init_host_aspm(pcie); @@ -897,9 +922,11 @@ static int tegra194_pcie_host_init(struct pcie_port *pp) disable_aspm_l12(pcie); } - val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF); - val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL; - dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val); + if (!pcie->of_data->has_l1ss_exit_fix) { + val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF); + val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL; + dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val); + } if (pcie->update_fc_fixup) { val = dw_pcie_readl_dbi(pci, CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF); @@ -912,14 +939,14 @@ static int tegra194_pcie_host_init(struct pcie_port *pp) return 0; } -static int tegra194_pcie_start_link(struct dw_pcie *pci) +static int tegra_pcie_dw_start_link(struct dw_pcie *pci) { u32 val, offset, speed, tmp; - struct tegra194_pcie *pcie = to_tegra_pcie(pci); - struct pcie_port *pp = &pci->pp; + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); + struct dw_pcie_rp *pp = &pci->pp; bool retry = true; - if (pcie->mode == DW_PCIE_EP_TYPE) { + if (pcie->of_data->mode == DW_PCIE_EP_TYPE) { enable_irq(pcie->pex_rst_irq); return 0; } @@ -978,9 +1005,9 @@ retry_link: offset = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_DLF); val = dw_pcie_readl_dbi(pci, offset + PCI_DLF_CAP); val &= ~PCI_DLF_EXCHANGE_ENABLE; - dw_pcie_writel_dbi(pci, offset, val); + dw_pcie_writel_dbi(pci, offset + PCI_DLF_CAP, val); - tegra194_pcie_host_init(pp); + tegra_pcie_dw_host_init(pp); dw_pcie_setup_rc(pp); retry = false; @@ -996,32 +1023,32 @@ retry_link: return 0; } -static int tegra194_pcie_link_up(struct dw_pcie *pci) +static int tegra_pcie_dw_link_up(struct dw_pcie *pci) { - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); u32 val = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA); return !!(val & PCI_EXP_LNKSTA_DLLLA); } -static void tegra194_pcie_stop_link(struct dw_pcie *pci) +static void tegra_pcie_dw_stop_link(struct dw_pcie *pci) { - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); disable_irq(pcie->pex_rst_irq); } static const struct dw_pcie_ops tegra_dw_pcie_ops = { - .link_up = tegra194_pcie_link_up, - .start_link = tegra194_pcie_start_link, - .stop_link = tegra194_pcie_stop_link, + .link_up = tegra_pcie_dw_link_up, + .start_link = tegra_pcie_dw_start_link, + .stop_link = tegra_pcie_dw_stop_link, }; -static const struct dw_pcie_host_ops tegra194_pcie_host_ops = { - .host_init = tegra194_pcie_host_init, +static const struct dw_pcie_host_ops tegra_pcie_dw_host_ops = { + .host_init = tegra_pcie_dw_host_init, }; -static void tegra_pcie_disable_phy(struct tegra194_pcie *pcie) +static void tegra_pcie_disable_phy(struct tegra_pcie_dw *pcie) { unsigned int phy_count = pcie->phy_count; @@ -1031,7 +1058,7 @@ static void tegra_pcie_disable_phy(struct tegra194_pcie *pcie) } } -static int tegra_pcie_enable_phy(struct tegra194_pcie *pcie) +static int tegra_pcie_enable_phy(struct tegra_pcie_dw *pcie) { unsigned int i; int ret; @@ -1058,7 +1085,7 @@ phy_exit: return ret; } -static int tegra194_pcie_parse_dt(struct tegra194_pcie *pcie) +static int tegra_pcie_dw_parse_dt(struct tegra_pcie_dw *pcie) { struct platform_device *pdev = to_platform_device(pcie->dev); struct device_node *np = pcie->dev->of_node; @@ -1111,13 +1138,27 @@ static int tegra194_pcie_parse_dt(struct tegra194_pcie *pcie) if (of_property_read_bool(np, "nvidia,update-fc-fixup")) pcie->update_fc_fixup = true; + /* RP using an external REFCLK is supported only in Tegra234 */ + if (pcie->of_data->version == TEGRA194_DWC_IP_VER) { + if (pcie->of_data->mode == DW_PCIE_EP_TYPE) + pcie->enable_ext_refclk = true; + } else { + pcie->enable_ext_refclk = + of_property_read_bool(pcie->dev->of_node, + "nvidia,enable-ext-refclk"); + } + pcie->supports_clkreq = of_property_read_bool(pcie->dev->of_node, "supports-clkreq"); pcie->enable_cdm_check = of_property_read_bool(np, "snps,enable-cdm-check"); - if (pcie->mode == DW_PCIE_RC_TYPE) + if (pcie->of_data->version == TEGRA234_DWC_IP_VER) + pcie->enable_srns = + of_property_read_bool(np, "nvidia,enable-srns"); + + if (pcie->of_data->mode == DW_PCIE_RC_TYPE) return 0; /* Endpoint mode specific DT entries */ @@ -1154,15 +1195,18 @@ static int tegra194_pcie_parse_dt(struct tegra194_pcie *pcie) return 0; } -static int tegra_pcie_bpmp_set_ctrl_state(struct tegra194_pcie *pcie, +static int tegra_pcie_bpmp_set_ctrl_state(struct tegra_pcie_dw *pcie, bool enable) { struct mrq_uphy_response resp; struct tegra_bpmp_message msg; struct mrq_uphy_request req; - /* Controller-5 doesn't need to have its state set by BPMP-FW */ - if (pcie->cid == 5) + /* + * Controller-5 doesn't need to have its state set by BPMP-FW in + * Tegra194 + */ + if (pcie->of_data->version == TEGRA194_DWC_IP_VER && pcie->cid == 5) return 0; memset(&req, 0, sizeof(req)); @@ -1182,7 +1226,7 @@ static int tegra_pcie_bpmp_set_ctrl_state(struct tegra194_pcie *pcie, return tegra_bpmp_transfer(pcie->bpmp, &msg); } -static int tegra_pcie_bpmp_set_pll_state(struct tegra194_pcie *pcie, +static int tegra_pcie_bpmp_set_pll_state(struct tegra_pcie_dw *pcie, bool enable) { struct mrq_uphy_response resp; @@ -1210,9 +1254,9 @@ static int tegra_pcie_bpmp_set_pll_state(struct tegra194_pcie *pcie, return tegra_bpmp_transfer(pcie->bpmp, &msg); } -static void tegra_pcie_downstream_dev_to_D0(struct tegra194_pcie *pcie) +static void tegra_pcie_downstream_dev_to_D0(struct tegra_pcie_dw *pcie) { - struct pcie_port *pp = &pcie->pci.pp; + struct dw_pcie_rp *pp = &pcie->pci.pp; struct pci_bus *child, *root_bus = NULL; struct pci_dev *pdev; @@ -1248,7 +1292,7 @@ static void tegra_pcie_downstream_dev_to_D0(struct tegra194_pcie *pcie) } } -static int tegra_pcie_get_slot_regulators(struct tegra194_pcie *pcie) +static int tegra_pcie_get_slot_regulators(struct tegra_pcie_dw *pcie) { pcie->slot_ctl_3v3 = devm_regulator_get_optional(pcie->dev, "vpcie3v3"); if (IS_ERR(pcie->slot_ctl_3v3)) { @@ -1269,7 +1313,7 @@ static int tegra_pcie_get_slot_regulators(struct tegra194_pcie *pcie) return 0; } -static int tegra_pcie_enable_slot_regulators(struct tegra194_pcie *pcie) +static int tegra_pcie_enable_slot_regulators(struct tegra_pcie_dw *pcie) { int ret; @@ -1307,7 +1351,7 @@ fail_12v_enable: return ret; } -static void tegra_pcie_disable_slot_regulators(struct tegra194_pcie *pcie) +static void tegra_pcie_disable_slot_regulators(struct tegra_pcie_dw *pcie) { if (pcie->slot_ctl_12v) regulator_disable(pcie->slot_ctl_12v); @@ -1315,7 +1359,7 @@ static void tegra_pcie_disable_slot_regulators(struct tegra194_pcie *pcie) regulator_disable(pcie->slot_ctl_3v3); } -static int tegra_pcie_config_controller(struct tegra194_pcie *pcie, +static int tegra_pcie_config_controller(struct tegra_pcie_dw *pcie, bool en_hw_hot_rst) { int ret; @@ -1328,6 +1372,14 @@ static int tegra_pcie_config_controller(struct tegra194_pcie *pcie, return ret; } + if (pcie->enable_ext_refclk) { + ret = tegra_pcie_bpmp_set_pll_state(pcie, true); + if (ret) { + dev_err(pcie->dev, "Failed to init UPHY: %d\n", ret); + goto fail_pll_init; + } + } + ret = tegra_pcie_enable_slot_regulators(pcie); if (ret < 0) goto fail_slot_reg_en; @@ -1351,11 +1403,13 @@ static int tegra_pcie_config_controller(struct tegra194_pcie *pcie, goto fail_core_apb_rst; } - if (en_hw_hot_rst) { + if (en_hw_hot_rst || pcie->of_data->has_sbr_reset_fix) { /* Enable HW_HOT_RST mode */ val = appl_readl(pcie, APPL_CTRL); val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK << APPL_CTRL_HW_HOT_RST_MODE_SHIFT); + val |= (APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST_LTSSM_EN << + APPL_CTRL_HW_HOT_RST_MODE_SHIFT); val |= APPL_CTRL_HW_HOT_RST_EN; appl_writel(pcie, val, APPL_CTRL); } @@ -1382,6 +1436,19 @@ static int tegra_pcie_config_controller(struct tegra194_pcie *pcie, val |= (APPL_CFG_MISC_ARCACHE_VAL << APPL_CFG_MISC_ARCACHE_SHIFT); appl_writel(pcie, val, APPL_CFG_MISC); + if (pcie->enable_srns || pcie->enable_ext_refclk) { + /* + * When Tegra PCIe RP is using external clock, it cannot supply + * same clock to its downstream hierarchy. Hence, gate PCIe RP + * REFCLK out pads when RP & EP are using separate clocks or RP + * is using an external REFCLK. + */ + val = appl_readl(pcie, APPL_PINMUX); + val |= APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE_EN; + val &= ~APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE; + appl_writel(pcie, val, APPL_PINMUX); + } + if (!pcie->supports_clkreq) { val = appl_readl(pcie, APPL_PINMUX); val |= APPL_PINMUX_CLKREQ_OVERRIDE_EN; @@ -1407,12 +1474,15 @@ fail_core_clk: fail_reg_en: tegra_pcie_disable_slot_regulators(pcie); fail_slot_reg_en: + if (pcie->enable_ext_refclk) + tegra_pcie_bpmp_set_pll_state(pcie, false); +fail_pll_init: tegra_pcie_bpmp_set_ctrl_state(pcie, false); return ret; } -static void tegra_pcie_unconfig_controller(struct tegra194_pcie *pcie) +static void tegra_pcie_unconfig_controller(struct tegra_pcie_dw *pcie) { int ret; @@ -1434,23 +1504,29 @@ static void tegra_pcie_unconfig_controller(struct tegra194_pcie *pcie) tegra_pcie_disable_slot_regulators(pcie); + if (pcie->enable_ext_refclk) { + ret = tegra_pcie_bpmp_set_pll_state(pcie, false); + if (ret) + dev_err(pcie->dev, "Failed to deinit UPHY: %d\n", ret); + } + ret = tegra_pcie_bpmp_set_ctrl_state(pcie, false); if (ret) dev_err(pcie->dev, "Failed to disable controller %d: %d\n", pcie->cid, ret); } -static int tegra_pcie_init_controller(struct tegra194_pcie *pcie) +static int tegra_pcie_init_controller(struct tegra_pcie_dw *pcie) { struct dw_pcie *pci = &pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; int ret; ret = tegra_pcie_config_controller(pcie, false); if (ret < 0) return ret; - pp->ops = &tegra194_pcie_host_ops; + pp->ops = &tegra_pcie_dw_host_ops; ret = dw_pcie_host_init(pp); if (ret < 0) { @@ -1465,11 +1541,11 @@ fail_host_init: return ret; } -static int tegra_pcie_try_link_l2(struct tegra194_pcie *pcie) +static int tegra_pcie_try_link_l2(struct tegra_pcie_dw *pcie) { u32 val; - if (!tegra194_pcie_link_up(&pcie->pci)) + if (!tegra_pcie_dw_link_up(&pcie->pci)) return 0; val = appl_readl(pcie, APPL_RADM_STATUS); @@ -1481,12 +1557,12 @@ static int tegra_pcie_try_link_l2(struct tegra194_pcie *pcie) 1, PME_ACK_TIMEOUT); } -static void tegra194_pcie_pme_turnoff(struct tegra194_pcie *pcie) +static void tegra_pcie_dw_pme_turnoff(struct tegra_pcie_dw *pcie) { u32 data; int err; - if (!tegra194_pcie_link_up(&pcie->pci)) { + if (!tegra_pcie_dw_link_up(&pcie->pci)) { dev_dbg(pcie->dev, "PCIe link is not up...!\n"); return; } @@ -1543,15 +1619,15 @@ static void tegra194_pcie_pme_turnoff(struct tegra194_pcie *pcie) appl_writel(pcie, data, APPL_PINMUX); } -static void tegra_pcie_deinit_controller(struct tegra194_pcie *pcie) +static void tegra_pcie_deinit_controller(struct tegra_pcie_dw *pcie) { tegra_pcie_downstream_dev_to_D0(pcie); dw_pcie_host_deinit(&pcie->pci.pp); - tegra194_pcie_pme_turnoff(pcie); + tegra_pcie_dw_pme_turnoff(pcie); tegra_pcie_unconfig_controller(pcie); } -static int tegra_pcie_config_rp(struct tegra194_pcie *pcie) +static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie) { struct device *dev = pcie->dev; char *name; @@ -1578,7 +1654,7 @@ static int tegra_pcie_config_rp(struct tegra194_pcie *pcie) goto fail_pm_get_sync; } - pcie->link_state = tegra194_pcie_link_up(&pcie->pci); + pcie->link_state = tegra_pcie_dw_link_up(&pcie->pci); if (!pcie->link_state) { ret = -ENOMEDIUM; goto fail_host_init; @@ -1603,7 +1679,7 @@ fail_pm_get_sync: return ret; } -static void pex_ep_event_pex_rst_assert(struct tegra194_pcie *pcie) +static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie) { u32 val; int ret; @@ -1634,6 +1710,13 @@ static void pex_ep_event_pex_rst_assert(struct tegra194_pcie *pcie) pm_runtime_put_sync(pcie->dev); + if (pcie->enable_ext_refclk) { + ret = tegra_pcie_bpmp_set_pll_state(pcie, false); + if (ret) + dev_err(pcie->dev, "Failed to turn off UPHY: %d\n", + ret); + } + ret = tegra_pcie_bpmp_set_pll_state(pcie, false); if (ret) dev_err(pcie->dev, "Failed to turn off UPHY: %d\n", ret); @@ -1642,13 +1725,14 @@ static void pex_ep_event_pex_rst_assert(struct tegra194_pcie *pcie) dev_dbg(pcie->dev, "Uninitialization of endpoint is completed\n"); } -static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie) +static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie) { struct dw_pcie *pci = &pcie->pci; struct dw_pcie_ep *ep = &pci->ep; struct device *dev = pcie->dev; u32 val; int ret; + u16 val_16; if (pcie->ep_state == EP_STATE_ENABLED) return; @@ -1660,10 +1744,20 @@ static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie) return; } - ret = tegra_pcie_bpmp_set_pll_state(pcie, true); + ret = tegra_pcie_bpmp_set_ctrl_state(pcie, true); if (ret) { - dev_err(dev, "Failed to init UPHY for PCIe EP: %d\n", ret); - goto fail_pll_init; + dev_err(pcie->dev, "Failed to enable controller %u: %d\n", + pcie->cid, ret); + goto fail_set_ctrl_state; + } + + if (pcie->enable_ext_refclk) { + ret = tegra_pcie_bpmp_set_pll_state(pcie, true); + if (ret) { + dev_err(dev, "Failed to init UPHY for PCIe EP: %d\n", + ret); + goto fail_pll_init; + } } ret = clk_prepare_enable(pcie->core_clk); @@ -1760,12 +1854,29 @@ static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie) disable_aspm_l12(pcie); } - val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF); - val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL; - dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val); + if (!pcie->of_data->has_l1ss_exit_fix) { + val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF); + val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL; + dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val); + } pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci, PCI_CAP_ID_EXP); + + val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL); + val_16 &= ~PCI_EXP_DEVCTL_PAYLOAD; + val_16 |= PCI_EXP_DEVCTL_PAYLOAD_256B; + dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL, val_16); + + /* Clear Slot Clock Configuration bit if SRNS configuration */ + if (pcie->enable_srns) { + val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + + PCI_EXP_LNKSTA); + val_16 &= ~PCI_EXP_LNKSTA_SLC; + dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA, + val_16); + } + clk_set_rate(pcie->core_clk, GEN4_CORE_CLK_FREQ); val = (ep->msi_mem_phys & MSIX_ADDR_MATCH_LOW_OFF_MASK); @@ -1782,6 +1893,13 @@ static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie) dw_pcie_ep_init_notify(ep); + /* Program the private control to allow sending LTR upstream */ + if (pcie->of_data->has_ltr_req_fix) { + val = appl_readl(pcie, APPL_LTR_MSG_2); + val |= APPL_LTR_MSG_2_LTR_MSG_REQ_STATE; + appl_writel(pcie, val, APPL_LTR_MSG_2); + } + /* Enable LTSSM */ val = appl_readl(pcie, APPL_CTRL); val |= APPL_CTRL_LTSSM_EN; @@ -1802,12 +1920,14 @@ fail_core_apb_rst: fail_core_clk_enable: tegra_pcie_bpmp_set_pll_state(pcie, false); fail_pll_init: + tegra_pcie_bpmp_set_ctrl_state(pcie, false); +fail_set_ctrl_state: pm_runtime_put_sync(dev); } static irqreturn_t tegra_pcie_ep_pex_rst_irq(int irq, void *arg) { - struct tegra194_pcie *pcie = arg; + struct tegra_pcie_dw *pcie = arg; if (gpiod_get_value(pcie->pex_rst_gpiod)) pex_ep_event_pex_rst_assert(pcie); @@ -1817,7 +1937,7 @@ static irqreturn_t tegra_pcie_ep_pex_rst_irq(int irq, void *arg) return IRQ_HANDLED; } -static int tegra_pcie_ep_raise_legacy_irq(struct tegra194_pcie *pcie, u16 irq) +static int tegra_pcie_ep_raise_legacy_irq(struct tegra_pcie_dw *pcie, u16 irq) { /* Tegra194 supports only INTA */ if (irq > 1) @@ -1829,7 +1949,7 @@ static int tegra_pcie_ep_raise_legacy_irq(struct tegra194_pcie *pcie, u16 irq) return 0; } -static int tegra_pcie_ep_raise_msi_irq(struct tegra194_pcie *pcie, u16 irq) +static int tegra_pcie_ep_raise_msi_irq(struct tegra_pcie_dw *pcie, u16 irq) { if (unlikely(irq > 31)) return -EINVAL; @@ -1839,7 +1959,7 @@ static int tegra_pcie_ep_raise_msi_irq(struct tegra194_pcie *pcie, u16 irq) return 0; } -static int tegra_pcie_ep_raise_msix_irq(struct tegra194_pcie *pcie, u16 irq) +static int tegra_pcie_ep_raise_msix_irq(struct tegra_pcie_dw *pcie, u16 irq) { struct dw_pcie_ep *ep = &pcie->pci.ep; @@ -1853,7 +1973,7 @@ static int tegra_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no, u16 interrupt_num) { struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - struct tegra194_pcie *pcie = to_tegra_pcie(pci); + struct tegra_pcie_dw *pcie = to_tegra_pcie(pci); switch (type) { case PCI_EPC_IRQ_LEGACY: @@ -1894,7 +2014,7 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = { .get_features = tegra_pcie_ep_get_features, }; -static int tegra_pcie_config_ep(struct tegra194_pcie *pcie, +static int tegra_pcie_config_ep(struct tegra_pcie_dw *pcie, struct platform_device *pdev) { struct dw_pcie *pci = &pcie->pci; @@ -1949,19 +2069,20 @@ static int tegra_pcie_config_ep(struct tegra194_pcie *pcie, if (ret) { dev_err(dev, "Failed to initialize DWC Endpoint subsystem: %d\n", ret); + pm_runtime_disable(dev); return ret; } return 0; } -static int tegra194_pcie_probe(struct platform_device *pdev) +static int tegra_pcie_dw_probe(struct platform_device *pdev) { - const struct tegra194_pcie_of_data *data; + const struct tegra_pcie_dw_of_data *data; struct device *dev = &pdev->dev; struct resource *atu_dma_res; - struct tegra194_pcie *pcie; - struct pcie_port *pp; + struct tegra_pcie_dw *pcie; + struct dw_pcie_rp *pp; struct dw_pcie *pci; struct phy **phys; char *name; @@ -1977,16 +2098,14 @@ static int tegra194_pcie_probe(struct platform_device *pdev) pci = &pcie->pci; pci->dev = &pdev->dev; pci->ops = &tegra_dw_pcie_ops; - pci->n_fts[0] = N_FTS_VAL; - pci->n_fts[1] = FTS_VAL; - pci->version = 0x490A; - + pcie->dev = &pdev->dev; + pcie->of_data = (struct tegra_pcie_dw_of_data *)data; + pci->n_fts[0] = pcie->of_data->n_fts[0]; + pci->n_fts[1] = pcie->of_data->n_fts[1]; pp = &pci->pp; pp->num_vectors = MAX_MSI_IRQS; - pcie->dev = &pdev->dev; - pcie->mode = (enum dw_pcie_device_mode)data->mode; - ret = tegra194_pcie_parse_dt(pcie); + ret = tegra_pcie_dw_parse_dt(pcie); if (ret < 0) { const char *level = KERN_ERR; @@ -2101,7 +2220,7 @@ static int tegra194_pcie_probe(struct platform_device *pdev) platform_set_drvdata(pdev, pcie); - switch (pcie->mode) { + switch (pcie->of_data->mode) { case DW_PCIE_RC_TYPE: ret = devm_request_irq(dev, pp->irq, tegra_pcie_rp_irq_handler, IRQF_SHARED, "tegra-pcie-intr", pcie); @@ -2136,7 +2255,8 @@ static int tegra194_pcie_probe(struct platform_device *pdev) break; default: - dev_err(dev, "Invalid PCIe device type %d\n", pcie->mode); + dev_err(dev, "Invalid PCIe device type %d\n", + pcie->of_data->mode); } fail: @@ -2144,16 +2264,22 @@ fail: return ret; } -static int tegra194_pcie_remove(struct platform_device *pdev) +static int tegra_pcie_dw_remove(struct platform_device *pdev) { - struct tegra194_pcie *pcie = platform_get_drvdata(pdev); + struct tegra_pcie_dw *pcie = platform_get_drvdata(pdev); - if (!pcie->link_state) - return 0; + if (pcie->of_data->mode == DW_PCIE_RC_TYPE) { + if (!pcie->link_state) + return 0; + + debugfs_remove_recursive(pcie->debugfs); + tegra_pcie_deinit_controller(pcie); + pm_runtime_put_sync(pcie->dev); + } else { + disable_irq(pcie->pex_rst_irq); + pex_ep_event_pex_rst_assert(pcie); + } - debugfs_remove_recursive(pcie->debugfs); - tegra_pcie_deinit_controller(pcie); - pm_runtime_put_sync(pcie->dev); pm_runtime_disable(pcie->dev); tegra_bpmp_put(pcie->bpmp); if (pcie->pex_refclk_sel_gpiod) @@ -2162,41 +2288,48 @@ static int tegra194_pcie_remove(struct platform_device *pdev) return 0; } -static int tegra194_pcie_suspend_late(struct device *dev) +static int tegra_pcie_dw_suspend_late(struct device *dev) { - struct tegra194_pcie *pcie = dev_get_drvdata(dev); + struct tegra_pcie_dw *pcie = dev_get_drvdata(dev); u32 val; + if (pcie->of_data->mode == DW_PCIE_EP_TYPE) { + dev_err(dev, "Failed to Suspend as Tegra PCIe is in EP mode\n"); + return -EPERM; + } + if (!pcie->link_state) return 0; /* Enable HW_HOT_RST mode */ - val = appl_readl(pcie, APPL_CTRL); - val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK << - APPL_CTRL_HW_HOT_RST_MODE_SHIFT); - val |= APPL_CTRL_HW_HOT_RST_EN; - appl_writel(pcie, val, APPL_CTRL); + if (!pcie->of_data->has_sbr_reset_fix) { + val = appl_readl(pcie, APPL_CTRL); + val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK << + APPL_CTRL_HW_HOT_RST_MODE_SHIFT); + val |= APPL_CTRL_HW_HOT_RST_EN; + appl_writel(pcie, val, APPL_CTRL); + } return 0; } -static int tegra194_pcie_suspend_noirq(struct device *dev) +static int tegra_pcie_dw_suspend_noirq(struct device *dev) { - struct tegra194_pcie *pcie = dev_get_drvdata(dev); + struct tegra_pcie_dw *pcie = dev_get_drvdata(dev); if (!pcie->link_state) return 0; tegra_pcie_downstream_dev_to_D0(pcie); - tegra194_pcie_pme_turnoff(pcie); + tegra_pcie_dw_pme_turnoff(pcie); tegra_pcie_unconfig_controller(pcie); return 0; } -static int tegra194_pcie_resume_noirq(struct device *dev) +static int tegra_pcie_dw_resume_noirq(struct device *dev) { - struct tegra194_pcie *pcie = dev_get_drvdata(dev); + struct tegra_pcie_dw *pcie = dev_get_drvdata(dev); int ret; if (!pcie->link_state) @@ -2206,7 +2339,7 @@ static int tegra194_pcie_resume_noirq(struct device *dev) if (ret < 0) return ret; - ret = tegra194_pcie_host_init(&pcie->pci.pp); + ret = tegra_pcie_dw_host_init(&pcie->pci.pp); if (ret < 0) { dev_err(dev, "Failed to init host: %d\n", ret); goto fail_host_init; @@ -2214,7 +2347,7 @@ static int tegra194_pcie_resume_noirq(struct device *dev) dw_pcie_setup_rc(&pcie->pci.pp); - ret = tegra194_pcie_start_link(&pcie->pci); + ret = tegra_pcie_dw_start_link(&pcie->pci); if (ret < 0) goto fail_host_init; @@ -2225,12 +2358,12 @@ fail_host_init: return ret; } -static int tegra194_pcie_resume_early(struct device *dev) +static int tegra_pcie_dw_resume_early(struct device *dev) { - struct tegra194_pcie *pcie = dev_get_drvdata(dev); + struct tegra_pcie_dw *pcie = dev_get_drvdata(dev); u32 val; - if (pcie->mode == DW_PCIE_EP_TYPE) { + if (pcie->of_data->mode == DW_PCIE_EP_TYPE) { dev_err(dev, "Suspend is not supported in EP mode"); return -ENOTSUPP; } @@ -2239,75 +2372,124 @@ static int tegra194_pcie_resume_early(struct device *dev) return 0; /* Disable HW_HOT_RST mode */ - val = appl_readl(pcie, APPL_CTRL); - val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK << - APPL_CTRL_HW_HOT_RST_MODE_SHIFT); - val |= APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST << - APPL_CTRL_HW_HOT_RST_MODE_SHIFT; - val &= ~APPL_CTRL_HW_HOT_RST_EN; - appl_writel(pcie, val, APPL_CTRL); + if (!pcie->of_data->has_sbr_reset_fix) { + val = appl_readl(pcie, APPL_CTRL); + val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK << + APPL_CTRL_HW_HOT_RST_MODE_SHIFT); + val |= APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST << + APPL_CTRL_HW_HOT_RST_MODE_SHIFT; + val &= ~APPL_CTRL_HW_HOT_RST_EN; + appl_writel(pcie, val, APPL_CTRL); + } return 0; } -static void tegra194_pcie_shutdown(struct platform_device *pdev) +static void tegra_pcie_dw_shutdown(struct platform_device *pdev) { - struct tegra194_pcie *pcie = platform_get_drvdata(pdev); + struct tegra_pcie_dw *pcie = platform_get_drvdata(pdev); - if (!pcie->link_state) - return; + if (pcie->of_data->mode == DW_PCIE_RC_TYPE) { + if (!pcie->link_state) + return; - debugfs_remove_recursive(pcie->debugfs); - tegra_pcie_downstream_dev_to_D0(pcie); + debugfs_remove_recursive(pcie->debugfs); + tegra_pcie_downstream_dev_to_D0(pcie); - disable_irq(pcie->pci.pp.irq); - if (IS_ENABLED(CONFIG_PCI_MSI)) - disable_irq(pcie->pci.pp.msi_irq); + disable_irq(pcie->pci.pp.irq); + if (IS_ENABLED(CONFIG_PCI_MSI)) + disable_irq(pcie->pci.pp.msi_irq[0]); - tegra194_pcie_pme_turnoff(pcie); - tegra_pcie_unconfig_controller(pcie); + tegra_pcie_dw_pme_turnoff(pcie); + tegra_pcie_unconfig_controller(pcie); + pm_runtime_put_sync(pcie->dev); + } else { + disable_irq(pcie->pex_rst_irq); + pex_ep_event_pex_rst_assert(pcie); + } } -static const struct tegra194_pcie_of_data tegra194_pcie_rc_of_data = { +static const struct tegra_pcie_dw_of_data tegra194_pcie_dw_rc_of_data = { + .version = TEGRA194_DWC_IP_VER, + .mode = DW_PCIE_RC_TYPE, + .cdm_chk_int_en_bit = BIT(19), + /* Gen4 - 5, 6, 8 and 9 presets enabled */ + .gen4_preset_vec = 0x360, + .n_fts = { 52, 52 }, +}; + +static const struct tegra_pcie_dw_of_data tegra194_pcie_dw_ep_of_data = { + .version = TEGRA194_DWC_IP_VER, + .mode = DW_PCIE_EP_TYPE, + .cdm_chk_int_en_bit = BIT(19), + /* Gen4 - 5, 6, 8 and 9 presets enabled */ + .gen4_preset_vec = 0x360, + .n_fts = { 52, 52 }, +}; + +static const struct tegra_pcie_dw_of_data tegra234_pcie_dw_rc_of_data = { + .version = TEGRA234_DWC_IP_VER, .mode = DW_PCIE_RC_TYPE, + .has_msix_doorbell_access_fix = true, + .has_sbr_reset_fix = true, + .has_l1ss_exit_fix = true, + .cdm_chk_int_en_bit = BIT(18), + /* Gen4 - 6, 8 and 9 presets enabled */ + .gen4_preset_vec = 0x340, + .n_fts = { 52, 80 }, }; -static const struct tegra194_pcie_of_data tegra194_pcie_ep_of_data = { +static const struct tegra_pcie_dw_of_data tegra234_pcie_dw_ep_of_data = { + .version = TEGRA234_DWC_IP_VER, .mode = DW_PCIE_EP_TYPE, + .has_l1ss_exit_fix = true, + .has_ltr_req_fix = true, + .cdm_chk_int_en_bit = BIT(18), + /* Gen4 - 6, 8 and 9 presets enabled */ + .gen4_preset_vec = 0x340, + .n_fts = { 52, 80 }, }; -static const struct of_device_id tegra194_pcie_of_match[] = { +static const struct of_device_id tegra_pcie_dw_of_match[] = { { .compatible = "nvidia,tegra194-pcie", - .data = &tegra194_pcie_rc_of_data, + .data = &tegra194_pcie_dw_rc_of_data, }, { .compatible = "nvidia,tegra194-pcie-ep", - .data = &tegra194_pcie_ep_of_data, + .data = &tegra194_pcie_dw_ep_of_data, + }, + { + .compatible = "nvidia,tegra234-pcie", + .data = &tegra234_pcie_dw_rc_of_data, + }, + { + .compatible = "nvidia,tegra234-pcie-ep", + .data = &tegra234_pcie_dw_ep_of_data, }, - {}, + {} }; -static const struct dev_pm_ops tegra194_pcie_pm_ops = { - .suspend_late = tegra194_pcie_suspend_late, - .suspend_noirq = tegra194_pcie_suspend_noirq, - .resume_noirq = tegra194_pcie_resume_noirq, - .resume_early = tegra194_pcie_resume_early, +static const struct dev_pm_ops tegra_pcie_dw_pm_ops = { + .suspend_late = tegra_pcie_dw_suspend_late, + .suspend_noirq = tegra_pcie_dw_suspend_noirq, + .resume_noirq = tegra_pcie_dw_resume_noirq, + .resume_early = tegra_pcie_dw_resume_early, }; -static struct platform_driver tegra194_pcie_driver = { - .probe = tegra194_pcie_probe, - .remove = tegra194_pcie_remove, - .shutdown = tegra194_pcie_shutdown, +static struct platform_driver tegra_pcie_dw_driver = { + .probe = tegra_pcie_dw_probe, + .remove = tegra_pcie_dw_remove, + .shutdown = tegra_pcie_dw_shutdown, .driver = { .name = "tegra194-pcie", - .pm = &tegra194_pcie_pm_ops, - .of_match_table = tegra194_pcie_of_match, + .pm = &tegra_pcie_dw_pm_ops, + .of_match_table = tegra_pcie_dw_of_match, }, }; -module_platform_driver(tegra194_pcie_driver); +module_platform_driver(tegra_pcie_dw_driver); -MODULE_DEVICE_TABLE(of, tegra194_pcie_of_match); +MODULE_DEVICE_TABLE(of, tegra_pcie_dw_of_match); MODULE_AUTHOR("Vidya Sagar <vidyas@nvidia.com>"); MODULE_DESCRIPTION("NVIDIA PCIe host controller driver"); diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c index b45ac3754242..48c3eba817b4 100644 --- a/drivers/pci/controller/dwc/pcie-uniphier.c +++ b/drivers/pci/controller/dwc/pcie-uniphier.c @@ -171,7 +171,7 @@ static void uniphier_pcie_irq_enable(struct uniphier_pcie *pcie) static void uniphier_pcie_irq_mask(struct irq_data *d) { - struct pcie_port *pp = irq_data_get_irq_chip_data(d); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct uniphier_pcie *pcie = to_uniphier_pcie(pci); unsigned long flags; @@ -188,7 +188,7 @@ static void uniphier_pcie_irq_mask(struct irq_data *d) static void uniphier_pcie_irq_unmask(struct irq_data *d) { - struct pcie_port *pp = irq_data_get_irq_chip_data(d); + struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct uniphier_pcie *pcie = to_uniphier_pcie(pci); unsigned long flags; @@ -225,7 +225,7 @@ static const struct irq_domain_ops uniphier_intx_domain_ops = { static void uniphier_pcie_irq_handler(struct irq_desc *desc) { - struct pcie_port *pp = irq_desc_get_handler_data(desc); + struct dw_pcie_rp *pp = irq_desc_get_handler_data(desc); struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct uniphier_pcie *pcie = to_uniphier_pcie(pci); struct irq_chip *chip = irq_desc_get_chip(desc); @@ -258,7 +258,7 @@ static void uniphier_pcie_irq_handler(struct irq_desc *desc) chained_irq_exit(chip, desc); } -static int uniphier_pcie_config_legacy_irq(struct pcie_port *pp) +static int uniphier_pcie_config_legacy_irq(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct uniphier_pcie *pcie = to_uniphier_pcie(pci); @@ -295,7 +295,7 @@ out_put_node: return ret; } -static int uniphier_pcie_host_init(struct pcie_port *pp) +static int uniphier_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct uniphier_pcie *pcie = to_uniphier_pcie(pci); diff --git a/drivers/pci/controller/dwc/pcie-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c index 50f80f07e4db..71026fefa366 100644 --- a/drivers/pci/controller/dwc/pcie-visconti.c +++ b/drivers/pci/controller/dwc/pcie-visconti.c @@ -178,7 +178,7 @@ static void visconti_pcie_stop_link(struct dw_pcie *pci) */ static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 cpu_addr) { - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; return cpu_addr & ~pp->io_base; } @@ -190,7 +190,7 @@ static const struct dw_pcie_ops dw_pcie_ops = { .stop_link = visconti_pcie_stop_link, }; -static int visconti_pcie_host_init(struct pcie_port *pp) +static int visconti_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct visconti_pcie *pcie = dev_get_drvdata(pci->dev); @@ -278,7 +278,7 @@ static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev) { struct dw_pcie *pci = &pcie->pci; - struct pcie_port *pp = &pci->pp; + struct dw_pcie_rp *pp = &pci->pp; pp->irq = platform_get_irq_byname(pdev, "intr"); if (pp->irq < 0) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index ffec82c8a523..966c8b48bd96 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -8,6 +8,7 @@ * Author: Hezi Shahmoon <hezi.shahmoon@marvell.com> */ +#include <linux/bitfield.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/interrupt.h> @@ -33,6 +34,7 @@ #define PCIE_CORE_CMD_STATUS_REG 0x4 #define PCIE_CORE_DEV_REV_REG 0x8 #define PCIE_CORE_PCIEXP_CAP 0xc0 +#define PCIE_CORE_PCIERR_CAP 0x100 #define PCIE_CORE_ERR_CAPCTL_REG 0x118 #define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX BIT(5) #define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN BIT(6) @@ -857,14 +859,11 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, switch (reg) { - case PCI_EXP_SLTCTL: - *value = PCI_EXP_SLTSTA_PDS << 16; - return PCI_BRIDGE_EMUL_HANDLED; - /* - * PCI_EXP_RTCTL and PCI_EXP_RTSTA are also supported, but do not need - * to be handled here, because their values are stored in emulated - * config space buffer, and we read them from there when needed. + * PCI_EXP_SLTCAP, PCI_EXP_SLTCTL, PCI_EXP_RTCTL and PCI_EXP_RTSTA are + * also supported, but do not need to be handled here, because their + * values are stored in emulated config space buffer, and we read them + * from there when needed. */ case PCI_EXP_LNKCAP: { @@ -944,11 +943,89 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, } } +static pci_bridge_emul_read_status_t +advk_pci_bridge_emul_ext_conf_read(struct pci_bridge_emul *bridge, + int reg, u32 *value) +{ + struct advk_pcie *pcie = bridge->data; + + switch (reg) { + case 0: + *value = advk_readl(pcie, PCIE_CORE_PCIERR_CAP + reg); + + /* + * PCI_EXT_CAP_NEXT bits are set to offset 0x150, but Armada + * 3700 Functional Specification does not document registers + * at those addresses. + * + * Thus we clear PCI_EXT_CAP_NEXT bits to make Advanced Error + * Reporting Capability header the last Extended Capability. + * If we obtain documentation for those registers in the + * future, this can be changed. + */ + *value &= 0x000fffff; + return PCI_BRIDGE_EMUL_HANDLED; + + case PCI_ERR_UNCOR_STATUS: + case PCI_ERR_UNCOR_MASK: + case PCI_ERR_UNCOR_SEVER: + case PCI_ERR_COR_STATUS: + case PCI_ERR_COR_MASK: + case PCI_ERR_CAP: + case PCI_ERR_HEADER_LOG + 0: + case PCI_ERR_HEADER_LOG + 4: + case PCI_ERR_HEADER_LOG + 8: + case PCI_ERR_HEADER_LOG + 12: + case PCI_ERR_ROOT_COMMAND: + case PCI_ERR_ROOT_STATUS: + case PCI_ERR_ROOT_ERR_SRC: + *value = advk_readl(pcie, PCIE_CORE_PCIERR_CAP + reg); + return PCI_BRIDGE_EMUL_HANDLED; + + default: + return PCI_BRIDGE_EMUL_NOT_HANDLED; + } +} + +static void +advk_pci_bridge_emul_ext_conf_write(struct pci_bridge_emul *bridge, + int reg, u32 old, u32 new, u32 mask) +{ + struct advk_pcie *pcie = bridge->data; + + switch (reg) { + /* These are W1C registers, so clear other bits */ + case PCI_ERR_UNCOR_STATUS: + case PCI_ERR_COR_STATUS: + case PCI_ERR_ROOT_STATUS: + new &= mask; + fallthrough; + + case PCI_ERR_UNCOR_MASK: + case PCI_ERR_UNCOR_SEVER: + case PCI_ERR_COR_MASK: + case PCI_ERR_CAP: + case PCI_ERR_HEADER_LOG + 0: + case PCI_ERR_HEADER_LOG + 4: + case PCI_ERR_HEADER_LOG + 8: + case PCI_ERR_HEADER_LOG + 12: + case PCI_ERR_ROOT_COMMAND: + case PCI_ERR_ROOT_ERR_SRC: + advk_writel(pcie, new, PCIE_CORE_PCIERR_CAP + reg); + break; + + default: + break; + } +} + static const struct pci_bridge_emul_ops advk_pci_bridge_emul_ops = { .read_base = advk_pci_bridge_emul_base_conf_read, .write_base = advk_pci_bridge_emul_base_conf_write, .read_pcie = advk_pci_bridge_emul_pcie_conf_read, .write_pcie = advk_pci_bridge_emul_pcie_conf_write, + .read_ext = advk_pci_bridge_emul_ext_conf_read, + .write_ext = advk_pci_bridge_emul_ext_conf_write, }; /* @@ -977,8 +1054,25 @@ static int advk_sw_pci_bridge_init(struct advk_pcie *pcie) /* Support interrupt A for MSI feature */ bridge->conf.intpin = PCI_INTERRUPT_INTA; - /* Aardvark HW provides PCIe Capability structure in version 2 */ - bridge->pcie_conf.cap = cpu_to_le16(2); + /* + * Aardvark HW provides PCIe Capability structure in version 2 and + * indicate slot support, which is emulated. + */ + bridge->pcie_conf.cap = cpu_to_le16(2 | PCI_EXP_FLAGS_SLOT); + + /* + * Set Presence Detect State bit permanently since there is no support + * for unplugging the card nor detecting whether it is plugged. (If a + * platform exists in the future that supports it, via a GPIO for + * example, it should be implemented via this bit.) + * + * Set physical slot number to 1 since there is only one port and zero + * value is reserved for ports within the same silicon as Root Port + * which is not our case. + */ + bridge->pcie_conf.slotcap = cpu_to_le32(FIELD_PREP(PCI_EXP_SLTCAP_PSN, + 1)); + bridge->pcie_conf.slotsta = cpu_to_le16(PCI_EXP_SLTSTA_PDS); /* Indicates supports for Completion Retry Status */ bridge->pcie_conf.rootcap = cpu_to_le16(PCI_EXP_RTCAP_CRSVIS); diff --git a/drivers/pci/controller/pci-loongson.c b/drivers/pci/controller/pci-loongson.c index 50a8e1d6f70a..05c50408f13b 100644 --- a/drivers/pci/controller/pci-loongson.c +++ b/drivers/pci/controller/pci-loongson.c @@ -9,6 +9,8 @@ #include <linux/of_pci.h> #include <linux/pci.h> #include <linux/pci_ids.h> +#include <linux/pci-acpi.h> +#include <linux/pci-ecam.h> #include "../pci.h" @@ -18,18 +20,31 @@ #define DEV_PCIE_PORT_2 0x7a29 #define DEV_LS2K_APB 0x7a02 -#define DEV_LS7A_CONF 0x7a10 +#define DEV_LS7A_GMAC 0x7a03 +#define DEV_LS7A_DC1 0x7a06 #define DEV_LS7A_LPC 0x7a0c +#define DEV_LS7A_AHCI 0x7a08 +#define DEV_LS7A_CONF 0x7a10 +#define DEV_LS7A_GNET 0x7a13 +#define DEV_LS7A_EHCI 0x7a14 +#define DEV_LS7A_DC2 0x7a36 +#define DEV_LS7A_HDMI 0x7a37 #define FLAG_CFG0 BIT(0) #define FLAG_CFG1 BIT(1) #define FLAG_DEV_FIX BIT(2) +#define FLAG_DEV_HIDDEN BIT(3) + +struct loongson_pci_data { + u32 flags; + struct pci_ops *ops; +}; struct loongson_pci { void __iomem *cfg0_base; void __iomem *cfg1_base; struct platform_device *pdev; - u32 flags; + const struct loongson_pci_data *data; }; /* Fixup wrong class code in PCIe bridges */ @@ -92,55 +107,106 @@ static void loongson_mrrs_quirk(struct pci_dev *dev) } DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, loongson_mrrs_quirk); -static void __iomem *cfg1_map(struct loongson_pci *priv, int bus, - unsigned int devfn, int where) +static void loongson_pci_pin_quirk(struct pci_dev *pdev) { - unsigned long addroff = 0x0; + pdev->pin = 1 + (PCI_FUNC(pdev->devfn) & 3); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_DC1, loongson_pci_pin_quirk); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_DC2, loongson_pci_pin_quirk); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_GMAC, loongson_pci_pin_quirk); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_AHCI, loongson_pci_pin_quirk); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_EHCI, loongson_pci_pin_quirk); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_GNET, loongson_pci_pin_quirk); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_HDMI, loongson_pci_pin_quirk); + +static struct loongson_pci *pci_bus_to_loongson_pci(struct pci_bus *bus) +{ + struct pci_config_window *cfg; - if (bus != 0) - addroff |= BIT(28); /* Type 1 Access */ - addroff |= (where & 0xff) | ((where & 0xf00) << 16); - addroff |= (bus << 16) | (devfn << 8); - return priv->cfg1_base + addroff; + if (acpi_disabled) + return (struct loongson_pci *)(bus->sysdata); + + cfg = bus->sysdata; + return (struct loongson_pci *)(cfg->priv); } -static void __iomem *cfg0_map(struct loongson_pci *priv, int bus, - unsigned int devfn, int where) +static void __iomem *cfg0_map(struct loongson_pci *priv, struct pci_bus *bus, + unsigned int devfn, int where) { unsigned long addroff = 0x0; + unsigned char busnum = bus->number; - if (bus != 0) + if (!pci_is_root_bus(bus)) { addroff |= BIT(24); /* Type 1 Access */ - addroff |= (bus << 16) | (devfn << 8) | where; + addroff |= (busnum << 16); + } + addroff |= (devfn << 8) | where; return priv->cfg0_base + addroff; } -static void __iomem *pci_loongson_map_bus(struct pci_bus *bus, unsigned int devfn, - int where) +static void __iomem *cfg1_map(struct loongson_pci *priv, struct pci_bus *bus, + unsigned int devfn, int where) { + unsigned long addroff = 0x0; unsigned char busnum = bus->number; - struct pci_host_bridge *bridge = pci_find_host_bridge(bus); - struct loongson_pci *priv = pci_host_bridge_priv(bridge); + + if (!pci_is_root_bus(bus)) { + addroff |= BIT(28); /* Type 1 Access */ + addroff |= (busnum << 16); + } + addroff |= (devfn << 8) | (where & 0xff) | ((where & 0xf00) << 16); + return priv->cfg1_base + addroff; +} + +static bool pdev_may_exist(struct pci_bus *bus, unsigned int device, + unsigned int function) +{ + return !(pci_is_root_bus(bus) && + (device >= 9 && device <= 20) && (function > 0)); +} + +static void __iomem *pci_loongson_map_bus(struct pci_bus *bus, + unsigned int devfn, int where) +{ + unsigned int device = PCI_SLOT(devfn); + unsigned int function = PCI_FUNC(devfn); + struct loongson_pci *priv = pci_bus_to_loongson_pci(bus); /* * Do not read more than one device on the bus other than - * the host bus. For our hardware the root bus is always bus 0. + * the host bus. */ - if (priv->flags & FLAG_DEV_FIX && busnum != 0 && - PCI_SLOT(devfn) > 0) - return NULL; + if ((priv->data->flags & FLAG_DEV_FIX) && bus->self) { + if (!pci_is_root_bus(bus) && (device > 0)) + return NULL; + } + + /* Don't access non-existent devices */ + if (priv->data->flags & FLAG_DEV_HIDDEN) { + if (!pdev_may_exist(bus, device, function)) + return NULL; + } /* CFG0 can only access standard space */ if (where < PCI_CFG_SPACE_SIZE && priv->cfg0_base) - return cfg0_map(priv, busnum, devfn, where); + return cfg0_map(priv, bus, devfn, where); /* CFG1 can access extended space */ if (where < PCI_CFG_SPACE_EXP_SIZE && priv->cfg1_base) - return cfg1_map(priv, busnum, devfn, where); + return cfg1_map(priv, bus, devfn, where); return NULL; } +#ifdef CONFIG_OF + static int loongson_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { int irq; @@ -159,20 +225,42 @@ static int loongson_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) return val; } -/* H/w only accept 32-bit PCI operations */ +/* LS2K/LS7A accept 8/16/32-bit PCI config operations */ static struct pci_ops loongson_pci_ops = { .map_bus = pci_loongson_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, +}; + +/* RS780/SR5690 only accept 32-bit PCI config operations */ +static struct pci_ops loongson_pci_ops32 = { + .map_bus = pci_loongson_map_bus, .read = pci_generic_config_read32, .write = pci_generic_config_write32, }; +static const struct loongson_pci_data ls2k_pci_data = { + .flags = FLAG_CFG1 | FLAG_DEV_FIX | FLAG_DEV_HIDDEN, + .ops = &loongson_pci_ops, +}; + +static const struct loongson_pci_data ls7a_pci_data = { + .flags = FLAG_CFG1 | FLAG_DEV_FIX | FLAG_DEV_HIDDEN, + .ops = &loongson_pci_ops, +}; + +static const struct loongson_pci_data rs780e_pci_data = { + .flags = FLAG_CFG0, + .ops = &loongson_pci_ops32, +}; + static const struct of_device_id loongson_pci_of_match[] = { { .compatible = "loongson,ls2k-pci", - .data = (void *)(FLAG_CFG0 | FLAG_CFG1 | FLAG_DEV_FIX), }, + .data = &ls2k_pci_data, }, { .compatible = "loongson,ls7a-pci", - .data = (void *)(FLAG_CFG0 | FLAG_CFG1 | FLAG_DEV_FIX), }, + .data = &ls7a_pci_data, }, { .compatible = "loongson,rs780e-pci", - .data = (void *)(FLAG_CFG0), }, + .data = &rs780e_pci_data, }, {} }; @@ -193,20 +281,20 @@ static int loongson_pci_probe(struct platform_device *pdev) priv = pci_host_bridge_priv(bridge); priv->pdev = pdev; - priv->flags = (unsigned long)of_device_get_match_data(dev); + priv->data = of_device_get_match_data(dev); - regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!regs) { - dev_err(dev, "missing mem resources for cfg0\n"); - return -EINVAL; + if (priv->data->flags & FLAG_CFG0) { + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) + dev_err(dev, "missing mem resources for cfg0\n"); + else { + priv->cfg0_base = devm_pci_remap_cfg_resource(dev, regs); + if (IS_ERR(priv->cfg0_base)) + return PTR_ERR(priv->cfg0_base); + } } - priv->cfg0_base = devm_pci_remap_cfg_resource(dev, regs); - if (IS_ERR(priv->cfg0_base)) - return PTR_ERR(priv->cfg0_base); - - /* CFG1 is optional */ - if (priv->flags & FLAG_CFG1) { + if (priv->data->flags & FLAG_CFG1) { regs = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (!regs) dev_info(dev, "missing mem resource for cfg1\n"); @@ -218,7 +306,7 @@ static int loongson_pci_probe(struct platform_device *pdev) } bridge->sysdata = priv; - bridge->ops = &loongson_pci_ops; + bridge->ops = priv->data->ops; bridge->map_irq = loongson_map_irq; return pci_host_probe(bridge); @@ -232,3 +320,41 @@ static struct platform_driver loongson_pci_driver = { .probe = loongson_pci_probe, }; builtin_platform_driver(loongson_pci_driver); + +#endif + +#ifdef CONFIG_ACPI + +static int loongson_pci_ecam_init(struct pci_config_window *cfg) +{ + struct device *dev = cfg->parent; + struct loongson_pci *priv; + struct loongson_pci_data *data; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + cfg->priv = priv; + data->flags = FLAG_CFG1 | FLAG_DEV_HIDDEN; + priv->data = data; + priv->cfg1_base = cfg->win - (cfg->busr.start << 16); + + return 0; +} + +const struct pci_ecam_ops loongson_pci_ecam_ops = { + .bus_shift = 16, + .init = loongson_pci_ecam_init, + .pci_ops = { + .map_bus = pci_loongson_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, + } +}; + +#endif diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c index c1ffdb06c971..af915c951f06 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -1216,7 +1216,6 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn, return -ENOENT; } -#ifdef CONFIG_PM_SLEEP static int mvebu_pcie_suspend(struct device *dev) { struct mvebu_pcie *pcie; @@ -1249,7 +1248,6 @@ static int mvebu_pcie_resume(struct device *dev) return 0; } -#endif static void mvebu_pcie_port_clk_put(void *data) { @@ -1737,7 +1735,7 @@ static const struct of_device_id mvebu_pcie_of_match_table[] = { }; static const struct dev_pm_ops mvebu_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mvebu_pcie_suspend, mvebu_pcie_resume) + NOIRQ_SYSTEM_SLEEP_PM_OPS(mvebu_pcie_suspend, mvebu_pcie_resume) }; static struct platform_driver mvebu_pcie_driver = { diff --git a/drivers/pci/controller/pci-rcar-gen2.c b/drivers/pci/controller/pci-rcar-gen2.c index 35804ea394fd..839695791757 100644 --- a/drivers/pci/controller/pci-rcar-gen2.c +++ b/drivers/pci/controller/pci-rcar-gen2.c @@ -328,6 +328,7 @@ static const struct of_device_id rcar_pci_of_match[] = { { .compatible = "renesas,pci-r8a7791", }, { .compatible = "renesas,pci-r8a7794", }, { .compatible = "renesas,pci-rcar-gen2", }, + { .compatible = "renesas,pci-rzn1", }, { }, }; diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c index 0457ec02ab70..8e323e93be91 100644 --- a/drivers/pci/controller/pci-tegra.c +++ b/drivers/pci/controller/pci-tegra.c @@ -2707,7 +2707,7 @@ static int tegra_pcie_remove(struct platform_device *pdev) return 0; } -static int __maybe_unused tegra_pcie_pm_suspend(struct device *dev) +static int tegra_pcie_pm_suspend(struct device *dev) { struct tegra_pcie *pcie = dev_get_drvdata(dev); struct tegra_pcie_port *port; @@ -2742,7 +2742,7 @@ static int __maybe_unused tegra_pcie_pm_suspend(struct device *dev) return 0; } -static int __maybe_unused tegra_pcie_pm_resume(struct device *dev) +static int tegra_pcie_pm_resume(struct device *dev) { struct tegra_pcie *pcie = dev_get_drvdata(dev); int err; @@ -2798,9 +2798,8 @@ poweroff: } static const struct dev_pm_ops tegra_pcie_pm_ops = { - SET_RUNTIME_PM_OPS(tegra_pcie_pm_suspend, tegra_pcie_pm_resume, NULL) - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_pcie_pm_suspend, - tegra_pcie_pm_resume) + RUNTIME_PM_OPS(tegra_pcie_pm_suspend, tegra_pcie_pm_resume, NULL) + NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_pcie_pm_suspend, tegra_pcie_pm_resume) }; static struct platform_driver tegra_pcie_driver = { diff --git a/drivers/pci/controller/pci-xgene.c b/drivers/pci/controller/pci-xgene.c index eb6240958bb0..549d3bd6d1c2 100644 --- a/drivers/pci/controller/pci-xgene.c +++ b/drivers/pci/controller/pci-xgene.c @@ -641,7 +641,7 @@ static const struct of_device_id xgene_pcie_match_table[] = { static struct platform_driver xgene_pcie_driver = { .driver = { .name = "xgene-pcie", - .of_match_table = of_match_ptr(xgene_pcie_match_table), + .of_match_table = xgene_pcie_match_table, .suppress_bind_attrs = true, }, .probe = xgene_pcie_probe, diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index e61058e13818..521acd632f1a 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -24,6 +24,7 @@ #include <linux/pci.h> #include <linux/pci-ecam.h> #include <linux/printk.h> +#include <linux/regulator/consumer.h> #include <linux/reset.h> #include <linux/sizes.h> #include <linux/slab.h> @@ -190,11 +191,6 @@ /* Forward declarations */ struct brcm_pcie; -static inline void brcm_pcie_bridge_sw_init_set_7278(struct brcm_pcie *pcie, u32 val); -static inline void brcm_pcie_bridge_sw_init_set_generic(struct brcm_pcie *pcie, u32 val); -static inline void brcm_pcie_perst_set_4908(struct brcm_pcie *pcie, u32 val); -static inline void brcm_pcie_perst_set_7278(struct brcm_pcie *pcie, u32 val); -static inline void brcm_pcie_perst_set_generic(struct brcm_pcie *pcie, u32 val); enum { RGR1_SW_INIT_1, @@ -223,64 +219,9 @@ struct pcie_cfg_data { void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val); }; -static const int pcie_offsets[] = { - [RGR1_SW_INIT_1] = 0x9210, - [EXT_CFG_INDEX] = 0x9000, - [EXT_CFG_DATA] = 0x9004, -}; - -static const int pcie_offsets_bmips_7425[] = { - [RGR1_SW_INIT_1] = 0x8010, - [EXT_CFG_INDEX] = 0x8300, - [EXT_CFG_DATA] = 0x8304, -}; - -static const struct pcie_cfg_data generic_cfg = { - .offsets = pcie_offsets, - .type = GENERIC, - .perst_set = brcm_pcie_perst_set_generic, - .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, -}; - -static const struct pcie_cfg_data bcm7425_cfg = { - .offsets = pcie_offsets_bmips_7425, - .type = BCM7425, - .perst_set = brcm_pcie_perst_set_generic, - .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, -}; - -static const struct pcie_cfg_data bcm7435_cfg = { - .offsets = pcie_offsets, - .type = BCM7435, - .perst_set = brcm_pcie_perst_set_generic, - .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, -}; - -static const struct pcie_cfg_data bcm4908_cfg = { - .offsets = pcie_offsets, - .type = BCM4908, - .perst_set = brcm_pcie_perst_set_4908, - .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, -}; - -static const int pcie_offset_bcm7278[] = { - [RGR1_SW_INIT_1] = 0xc010, - [EXT_CFG_INDEX] = 0x9000, - [EXT_CFG_DATA] = 0x9004, -}; - -static const struct pcie_cfg_data bcm7278_cfg = { - .offsets = pcie_offset_bcm7278, - .type = BCM7278, - .perst_set = brcm_pcie_perst_set_7278, - .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_7278, -}; - -static const struct pcie_cfg_data bcm2711_cfg = { - .offsets = pcie_offsets, - .type = BCM2711, - .perst_set = brcm_pcie_perst_set_generic, - .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +struct subdev_regulators { + unsigned int num_supplies; + struct regulator_bulk_data supplies[]; }; struct brcm_msi { @@ -320,6 +261,8 @@ struct brcm_pcie { u32 hw_rev; void (*perst_set)(struct brcm_pcie *pcie, u32 val); void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val); + struct subdev_regulators *sr; + bool ep_wakeup_capable; }; static inline bool is_bmips(const struct brcm_pcie *pcie) @@ -741,52 +684,48 @@ static bool brcm_pcie_link_up(struct brcm_pcie *pcie) return dla && plu; } -static void __iomem *brcm_pcie_map_conf(struct pci_bus *bus, unsigned int devfn, - int where) +static void __iomem *brcm_pcie_map_bus(struct pci_bus *bus, + unsigned int devfn, int where) { struct brcm_pcie *pcie = bus->sysdata; void __iomem *base = pcie->base; int idx; - /* Accesses to the RC go right to the RC registers if slot==0 */ + /* Accesses to the RC go right to the RC registers if !devfn */ if (pci_is_root_bus(bus)) - return PCI_SLOT(devfn) ? NULL : base + where; + return devfn ? NULL : base + PCIE_ECAM_REG(where); + + /* An access to our HW w/o link-up will cause a CPU Abort */ + if (!brcm_pcie_link_up(pcie)) + return NULL; /* For devices, write to the config space index register */ idx = PCIE_ECAM_OFFSET(bus->number, devfn, 0); writel(idx, pcie->base + PCIE_EXT_CFG_INDEX); - return base + PCIE_EXT_CFG_DATA + where; + return base + PCIE_EXT_CFG_DATA + PCIE_ECAM_REG(where); } -static void __iomem *brcm_pcie_map_conf32(struct pci_bus *bus, unsigned int devfn, - int where) +static void __iomem *brcm7425_pcie_map_bus(struct pci_bus *bus, + unsigned int devfn, int where) { struct brcm_pcie *pcie = bus->sysdata; void __iomem *base = pcie->base; int idx; - /* Accesses to the RC go right to the RC registers if slot==0 */ + /* Accesses to the RC go right to the RC registers if !devfn */ if (pci_is_root_bus(bus)) - return PCI_SLOT(devfn) ? NULL : base + (where & ~0x3); + return devfn ? NULL : base + PCIE_ECAM_REG(where); + + /* An access to our HW w/o link-up will cause a CPU Abort */ + if (!brcm_pcie_link_up(pcie)) + return NULL; /* For devices, write to the config space index register */ - idx = PCIE_ECAM_OFFSET(bus->number, devfn, (where & ~3)); + idx = PCIE_ECAM_OFFSET(bus->number, devfn, where); writel(idx, base + IDX_ADDR(pcie)); return base + DATA_ADDR(pcie); } -static struct pci_ops brcm_pcie_ops = { - .map_bus = brcm_pcie_map_conf, - .read = pci_generic_config_read, - .write = pci_generic_config_write, -}; - -static struct pci_ops brcm_pcie_ops32 = { - .map_bus = brcm_pcie_map_conf32, - .read = pci_generic_config_read32, - .write = pci_generic_config_write32, -}; - static inline void brcm_pcie_bridge_sw_init_set_generic(struct brcm_pcie *pcie, u32 val) { u32 tmp, mask = RGR1_SW_INIT_1_INIT_GENERIC_MASK; @@ -926,17 +865,13 @@ static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie, static int brcm_pcie_setup(struct brcm_pcie *pcie) { - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); u64 rc_bar2_offset, rc_bar2_size; void __iomem *base = pcie->base; - struct device *dev = pcie->dev; + struct pci_host_bridge *bridge; struct resource_entry *entry; - bool ssc_good = false; - struct resource *res; - int num_out_wins = 0; - u16 nlw, cls, lnksta; - int i, ret, memc; u32 tmp, burst, aspm_support; + int num_out_wins = 0; + int ret, memc; /* Reset the bridge */ pcie->bridge_sw_init_set(pcie, 1); @@ -1012,6 +947,11 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) else pcie->msi_target_addr = BRCM_MSI_TARGET_ADDR_GT_4GB; + if (!brcm_pcie_rc_mode(pcie)) { + dev_err(pcie->dev, "PCIe RC controller misconfigured as Endpoint\n"); + return -EINVAL; + } + /* disable the PCIe->GISB memory window (RC_BAR1) */ tmp = readl(base + PCIE_MISC_RC_BAR1_CONFIG_LO); tmp &= ~PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK; @@ -1022,31 +962,27 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) tmp &= ~PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK; writel(tmp, base + PCIE_MISC_RC_BAR3_CONFIG_LO); - if (pcie->gen) - brcm_pcie_set_gen(pcie, pcie->gen); - - /* Unassert the fundamental reset */ - pcie->perst_set(pcie, 0); + /* Don't advertise L0s capability if 'aspm-no-l0s' */ + aspm_support = PCIE_LINK_STATE_L1; + if (!of_property_read_bool(pcie->np, "aspm-no-l0s")) + aspm_support |= PCIE_LINK_STATE_L0S; + tmp = readl(base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); + u32p_replace_bits(&tmp, aspm_support, + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK); + writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); /* - * Give the RC/EP time to wake up, before trying to configure RC. - * Intermittently check status for link-up, up to a total of 100ms. + * For config space accesses on the RC, show the right class for + * a PCIe-PCIe bridge (the default setting is to be EP mode). */ - for (i = 0; i < 100 && !brcm_pcie_link_up(pcie); i += 5) - msleep(5); - - if (!brcm_pcie_link_up(pcie)) { - dev_err(dev, "link down\n"); - return -ENODEV; - } - - if (!brcm_pcie_rc_mode(pcie)) { - dev_err(dev, "PCIe misconfigured; is in EP mode\n"); - return -EINVAL; - } + tmp = readl(base + PCIE_RC_CFG_PRIV1_ID_VAL3); + u32p_replace_bits(&tmp, 0x060400, + PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK); + writel(tmp, base + PCIE_RC_CFG_PRIV1_ID_VAL3); + bridge = pci_host_bridge_from_priv(pcie); resource_list_for_each_entry(entry, &bridge->windows) { - res = entry->res; + struct resource *res = entry->res; if (resource_type(res) != IORESOURCE_MEM) continue; @@ -1075,23 +1011,41 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) num_out_wins++; } - /* Don't advertise L0s capability if 'aspm-no-l0s' */ - aspm_support = PCIE_LINK_STATE_L1; - if (!of_property_read_bool(pcie->np, "aspm-no-l0s")) - aspm_support |= PCIE_LINK_STATE_L0S; - tmp = readl(base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); - u32p_replace_bits(&tmp, aspm_support, - PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK); - writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); + /* PCIe->SCB endian mode for BAR */ + tmp = readl(base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1); + u32p_replace_bits(&tmp, PCIE_RC_CFG_VENDOR_SPCIFIC_REG1_LITTLE_ENDIAN, + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK); + writel(tmp, base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1); + + return 0; +} + +static int brcm_pcie_start_link(struct brcm_pcie *pcie) +{ + struct device *dev = pcie->dev; + void __iomem *base = pcie->base; + u16 nlw, cls, lnksta; + bool ssc_good = false; + u32 tmp; + int ret, i; + + /* Unassert the fundamental reset */ + pcie->perst_set(pcie, 0); /* - * For config space accesses on the RC, show the right class for - * a PCIe-PCIe bridge (the default setting is to be EP mode). + * Give the RC/EP time to wake up, before trying to configure RC. + * Intermittently check status for link-up, up to a total of 100ms. */ - tmp = readl(base + PCIE_RC_CFG_PRIV1_ID_VAL3); - u32p_replace_bits(&tmp, 0x060400, - PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK); - writel(tmp, base + PCIE_RC_CFG_PRIV1_ID_VAL3); + for (i = 0; i < 100 && !brcm_pcie_link_up(pcie); i += 5) + msleep(5); + + if (!brcm_pcie_link_up(pcie)) { + dev_err(dev, "link down\n"); + return -ENODEV; + } + + if (pcie->gen) + brcm_pcie_set_gen(pcie, pcie->gen); if (pcie->ssc) { ret = brcm_pcie_set_ssc(pcie); @@ -1108,12 +1062,6 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) pci_speed_string(pcie_link_speed[cls]), nlw, ssc_good ? "(SSC)" : "(!SSC)"); - /* PCIe->SCB endian mode for BAR */ - tmp = readl(base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1); - u32p_replace_bits(&tmp, PCIE_RC_CFG_VENDOR_SPCIFIC_REG1_LITTLE_ENDIAN, - PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK); - writel(tmp, base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1); - /* * Refclk from RC should be gated with CLKREQ# input when ASPM L0s,L1 * is enabled => setting the CLKREQ_DEBUG_ENABLE field to 1. @@ -1125,6 +1073,82 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) return 0; } +static const char * const supplies[] = { + "vpcie3v3", + "vpcie3v3aux", + "vpcie12v", +}; + +static void *alloc_subdev_regulators(struct device *dev) +{ + const size_t size = sizeof(struct subdev_regulators) + + sizeof(struct regulator_bulk_data) * ARRAY_SIZE(supplies); + struct subdev_regulators *sr; + int i; + + sr = devm_kzalloc(dev, size, GFP_KERNEL); + if (sr) { + sr->num_supplies = ARRAY_SIZE(supplies); + for (i = 0; i < ARRAY_SIZE(supplies); i++) + sr->supplies[i].supply = supplies[i]; + } + + return sr; +} + +static int brcm_pcie_add_bus(struct pci_bus *bus) +{ + struct brcm_pcie *pcie = bus->sysdata; + struct device *dev = &bus->dev; + struct subdev_regulators *sr; + int ret; + + if (!bus->parent || !pci_is_root_bus(bus->parent)) + return 0; + + if (dev->of_node) { + sr = alloc_subdev_regulators(dev); + if (!sr) { + dev_info(dev, "Can't allocate regulators for downstream device\n"); + goto no_regulators; + } + + pcie->sr = sr; + + ret = regulator_bulk_get(dev, sr->num_supplies, sr->supplies); + if (ret) { + dev_info(dev, "No regulators for downstream device\n"); + goto no_regulators; + } + + ret = regulator_bulk_enable(sr->num_supplies, sr->supplies); + if (ret) { + dev_err(dev, "Can't enable regulators for downstream device\n"); + regulator_bulk_free(sr->num_supplies, sr->supplies); + pcie->sr = NULL; + } + } + +no_regulators: + brcm_pcie_start_link(pcie); + return 0; +} + +static void brcm_pcie_remove_bus(struct pci_bus *bus) +{ + struct brcm_pcie *pcie = bus->sysdata; + struct subdev_regulators *sr = pcie->sr; + struct device *dev = &bus->dev; + + if (!sr) + return; + + if (regulator_bulk_disable(sr->num_supplies, sr->supplies)) + dev_err(dev, "Failed to disable regulators for downstream device\n"); + regulator_bulk_free(sr->num_supplies, sr->supplies); + pcie->sr = NULL; +} + /* L23 is a low-power PCIe link state */ static void brcm_pcie_enter_l23(struct brcm_pcie *pcie) { @@ -1221,9 +1245,21 @@ static void brcm_pcie_turn_off(struct brcm_pcie *pcie) pcie->bridge_sw_init_set(pcie, 1); } -static int brcm_pcie_suspend(struct device *dev) +static int pci_dev_may_wakeup(struct pci_dev *dev, void *data) +{ + bool *ret = data; + + if (device_may_wakeup(&dev->dev)) { + *ret = true; + dev_info(&dev->dev, "Possible wake-up device; regulators will not be disabled\n"); + } + return (int) *ret; +} + +static int brcm_pcie_suspend_noirq(struct device *dev) { struct brcm_pcie *pcie = dev_get_drvdata(dev); + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); int ret; brcm_pcie_turn_off(pcie); @@ -1241,12 +1277,31 @@ static int brcm_pcie_suspend(struct device *dev) return ret; } + if (pcie->sr) { + /* + * Now turn off the regulators, but if at least one + * downstream device is enabled as a wake-up source, do not + * turn off regulators. + */ + pcie->ep_wakeup_capable = false; + pci_walk_bus(bridge->bus, pci_dev_may_wakeup, + &pcie->ep_wakeup_capable); + if (!pcie->ep_wakeup_capable) { + ret = regulator_bulk_disable(pcie->sr->num_supplies, + pcie->sr->supplies); + if (ret) { + dev_err(dev, "Could not turn off regulators\n"); + reset_control_reset(pcie->rescal); + return ret; + } + } + } clk_disable_unprepare(pcie->clk); return 0; } -static int brcm_pcie_resume(struct device *dev) +static int brcm_pcie_resume_noirq(struct device *dev) { struct brcm_pcie *pcie = dev_get_drvdata(dev); void __iomem *base; @@ -1281,11 +1336,37 @@ static int brcm_pcie_resume(struct device *dev) if (ret) goto err_reset; + if (pcie->sr) { + if (pcie->ep_wakeup_capable) { + /* + * We are resuming from a suspend. In the suspend we + * did not disable the power supplies, so there is + * no need to enable them (and falsely increase their + * usage count). + */ + pcie->ep_wakeup_capable = false; + } else { + ret = regulator_bulk_enable(pcie->sr->num_supplies, + pcie->sr->supplies); + if (ret) { + dev_err(dev, "Could not turn on regulators\n"); + goto err_reset; + } + } + } + + ret = brcm_pcie_start_link(pcie); + if (ret) + goto err_regulator; + if (pcie->msi) brcm_msi_set_regs(pcie->msi); return 0; +err_regulator: + if (pcie->sr) + regulator_bulk_disable(pcie->sr->num_supplies, pcie->sr->supplies); err_reset: reset_control_rearm(pcie->rescal); err_disable_clk: @@ -1316,6 +1397,66 @@ static int brcm_pcie_remove(struct platform_device *pdev) return 0; } +static const int pcie_offsets[] = { + [RGR1_SW_INIT_1] = 0x9210, + [EXT_CFG_INDEX] = 0x9000, + [EXT_CFG_DATA] = 0x9004, +}; + +static const int pcie_offsets_bmips_7425[] = { + [RGR1_SW_INIT_1] = 0x8010, + [EXT_CFG_INDEX] = 0x8300, + [EXT_CFG_DATA] = 0x8304, +}; + +static const struct pcie_cfg_data generic_cfg = { + .offsets = pcie_offsets, + .type = GENERIC, + .perst_set = brcm_pcie_perst_set_generic, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + +static const struct pcie_cfg_data bcm7425_cfg = { + .offsets = pcie_offsets_bmips_7425, + .type = BCM7425, + .perst_set = brcm_pcie_perst_set_generic, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + +static const struct pcie_cfg_data bcm7435_cfg = { + .offsets = pcie_offsets, + .type = BCM7435, + .perst_set = brcm_pcie_perst_set_generic, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + +static const struct pcie_cfg_data bcm4908_cfg = { + .offsets = pcie_offsets, + .type = BCM4908, + .perst_set = brcm_pcie_perst_set_4908, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + +static const int pcie_offset_bcm7278[] = { + [RGR1_SW_INIT_1] = 0xc010, + [EXT_CFG_INDEX] = 0x9000, + [EXT_CFG_DATA] = 0x9004, +}; + +static const struct pcie_cfg_data bcm7278_cfg = { + .offsets = pcie_offset_bcm7278, + .type = BCM7278, + .perst_set = brcm_pcie_perst_set_7278, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_7278, +}; + +static const struct pcie_cfg_data bcm2711_cfg = { + .offsets = pcie_offsets, + .type = BCM2711, + .perst_set = brcm_pcie_perst_set_generic, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + static const struct of_device_id brcm_pcie_match[] = { { .compatible = "brcm,bcm2711-pcie", .data = &bcm2711_cfg }, { .compatible = "brcm,bcm4908-pcie", .data = &bcm4908_cfg }, @@ -1328,6 +1469,22 @@ static const struct of_device_id brcm_pcie_match[] = { {}, }; +static struct pci_ops brcm_pcie_ops = { + .map_bus = brcm_pcie_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, + .add_bus = brcm_pcie_add_bus, + .remove_bus = brcm_pcie_remove_bus, +}; + +static struct pci_ops brcm7425_pcie_ops = { + .map_bus = brcm7425_pcie_map_bus, + .read = pci_generic_config_read32, + .write = pci_generic_config_write32, + .add_bus = brcm_pcie_add_bus, + .remove_bus = brcm_pcie_remove_bus, +}; + static int brcm_pcie_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node, *msi_np; @@ -1414,12 +1571,22 @@ static int brcm_pcie_probe(struct platform_device *pdev) } } - bridge->ops = pcie->type == BCM7425 ? &brcm_pcie_ops32 : &brcm_pcie_ops; + bridge->ops = pcie->type == BCM7425 ? &brcm7425_pcie_ops : &brcm_pcie_ops; bridge->sysdata = pcie; platform_set_drvdata(pdev, pcie); - return pci_host_probe(bridge); + ret = pci_host_probe(bridge); + if (!ret && !brcm_pcie_link_up(pcie)) + ret = -ENODEV; + + if (ret) { + brcm_pcie_remove(pdev); + return ret; + } + + return 0; + fail: __brcm_pcie_remove(pcie); return ret; @@ -1428,8 +1595,8 @@ fail: MODULE_DEVICE_TABLE(of, brcm_pcie_match); static const struct dev_pm_ops brcm_pcie_pm_ops = { - .suspend = brcm_pcie_suspend, - .resume = brcm_pcie_resume, + .suspend_noirq = brcm_pcie_suspend_noirq, + .resume_noirq = brcm_pcie_resume_noirq, }; static struct platform_driver brcm_pcie_driver = { diff --git a/drivers/pci/controller/pcie-iproc-msi.c b/drivers/pci/controller/pcie-iproc-msi.c index 757b7fbcdc59..fee036b07cd4 100644 --- a/drivers/pci/controller/pcie-iproc-msi.c +++ b/drivers/pci/controller/pcie-iproc-msi.c @@ -589,8 +589,8 @@ int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node) msi->has_inten_reg = true; msi->nr_msi_vecs = msi->nr_irqs * EQ_LEN; - msi->bitmap = devm_kcalloc(pcie->dev, BITS_TO_LONGS(msi->nr_msi_vecs), - sizeof(*msi->bitmap), GFP_KERNEL); + msi->bitmap = devm_bitmap_zalloc(pcie->dev, msi->nr_msi_vecs, + GFP_KERNEL); if (!msi->bitmap) return -ENOMEM; diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 5d9fd36b02d1..11cdb9b6f109 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -153,6 +153,37 @@ struct mtk_gen3_pcie { DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM); }; +/* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */ +static const char *const ltssm_str[] = { + "detect.quiet", /* 0x00 */ + "detect.active", /* 0x01 */ + "polling.active", /* 0x02 */ + "polling.compliance", /* 0x03 */ + "polling.configuration", /* 0x04 */ + "config.linkwidthstart", /* 0x05 */ + "config.linkwidthaccept", /* 0x06 */ + "config.lanenumwait", /* 0x07 */ + "config.lanenumaccept", /* 0x08 */ + "config.complete", /* 0x09 */ + "config.idle", /* 0x0A */ + "recovery.receiverlock", /* 0x0B */ + "recovery.equalization", /* 0x0C */ + "recovery.speed", /* 0x0D */ + "recovery.receiverconfig", /* 0x0E */ + "recovery.idle", /* 0x0F */ + "L0", /* 0x10 */ + "L0s", /* 0x11 */ + "L1.entry", /* 0x12 */ + "L1.idle", /* 0x13 */ + "L2.idle", /* 0x14 */ + "L2.transmitwake", /* 0x15 */ + "disable", /* 0x16 */ + "loopback.entry", /* 0x17 */ + "loopback.active", /* 0x18 */ + "loopback.exit", /* 0x19 */ + "hotreset", /* 0x1A */ +}; + /** * mtk_pcie_config_tlp_header() - Configure a configuration TLP header * @bus: PCI bus to query @@ -327,8 +358,16 @@ static int mtk_pcie_startup_port(struct mtk_gen3_pcie *pcie) !!(val & PCIE_PORT_LINKUP), 20, PCI_PM_D3COLD_WAIT * USEC_PER_MSEC); if (err) { + const char *ltssm_state; + int ltssm_index; + val = readl_relaxed(pcie->base + PCIE_LTSSM_STATUS_REG); - dev_err(pcie->dev, "PCIe link down, ltssm reg val: %#x\n", val); + ltssm_index = PCIE_LTSSM_STATE(val); + ltssm_state = ltssm_index >= ARRAY_SIZE(ltssm_str) ? + "Unknown state" : ltssm_str[ltssm_index]; + dev_err(pcie->dev, + "PCIe link down, current LTSSM state: %s (%#x)\n", + ltssm_state, val); return err; } @@ -600,7 +639,8 @@ static int mtk_pcie_init_irq_domains(struct mtk_gen3_pcie *pcie) &intx_domain_ops, pcie); if (!pcie->intx_domain) { dev_err(dev, "failed to create INTx IRQ domain\n"); - return -ENODEV; + ret = -ENODEV; + goto out_put_node; } /* Setup MSI */ @@ -623,13 +663,15 @@ static int mtk_pcie_init_irq_domains(struct mtk_gen3_pcie *pcie) goto err_msi_domain; } + of_node_put(intc_node); return 0; err_msi_domain: irq_domain_remove(pcie->msi_bottom_domain); err_msi_bottom_domain: irq_domain_remove(pcie->intx_domain); - +out_put_node: + of_node_put(intc_node); return ret; } @@ -917,7 +959,7 @@ static int mtk_pcie_remove(struct platform_device *pdev) return 0; } -static void __maybe_unused mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) +static void mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) { int i; @@ -935,7 +977,7 @@ static void __maybe_unused mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) raw_spin_unlock(&pcie->irq_lock); } -static void __maybe_unused mtk_pcie_irq_restore(struct mtk_gen3_pcie *pcie) +static void mtk_pcie_irq_restore(struct mtk_gen3_pcie *pcie) { int i; @@ -953,7 +995,7 @@ static void __maybe_unused mtk_pcie_irq_restore(struct mtk_gen3_pcie *pcie) raw_spin_unlock(&pcie->irq_lock); } -static int __maybe_unused mtk_pcie_turn_off_link(struct mtk_gen3_pcie *pcie) +static int mtk_pcie_turn_off_link(struct mtk_gen3_pcie *pcie) { u32 val; @@ -968,7 +1010,7 @@ static int __maybe_unused mtk_pcie_turn_off_link(struct mtk_gen3_pcie *pcie) 50 * USEC_PER_MSEC); } -static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) +static int mtk_pcie_suspend_noirq(struct device *dev) { struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev); int err; @@ -994,7 +1036,7 @@ static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) return 0; } -static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) +static int mtk_pcie_resume_noirq(struct device *dev) { struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev); int err; @@ -1015,8 +1057,8 @@ static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) } static const struct dev_pm_ops mtk_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, - mtk_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, + mtk_pcie_resume_noirq) }; static const struct of_device_id mtk_pcie_of_match[] = { diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index be8bd919cb88..ae5ad05ddc1d 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -1150,7 +1150,7 @@ static int mtk_pcie_remove(struct platform_device *pdev) return 0; } -static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) +static int mtk_pcie_suspend_noirq(struct device *dev) { struct mtk_pcie *pcie = dev_get_drvdata(dev); struct mtk_pcie_port *port; @@ -1174,7 +1174,7 @@ static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) return 0; } -static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) +static int mtk_pcie_resume_noirq(struct device *dev) { struct mtk_pcie *pcie = dev_get_drvdata(dev); struct mtk_pcie_port *port, *tmp; @@ -1195,8 +1195,8 @@ static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) } static const struct dev_pm_ops mtk_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, - mtk_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, + mtk_pcie_resume_noirq) }; static const struct mtk_pcie_soc mtk_pcie_soc_v1 = { diff --git a/drivers/pci/controller/pcie-microchip-host.c b/drivers/pci/controller/pcie-microchip-host.c index dd5dba419047..7263d175b5ad 100644 --- a/drivers/pci/controller/pcie-microchip-host.c +++ b/drivers/pci/controller/pcie-microchip-host.c @@ -904,6 +904,7 @@ static int mc_pcie_init_irq_domains(struct mc_pcie *port) &event_domain_ops, port); if (!port->event_domain) { dev_err(dev, "failed to get event domain\n"); + of_node_put(pcie_intc_node); return -ENOMEM; } @@ -913,6 +914,7 @@ static int mc_pcie_init_irq_domains(struct mc_pcie *port) &intx_domain_ops, port); if (!port->intx_domain) { dev_err(dev, "failed to get an INTx IRQ domain\n"); + of_node_put(pcie_intc_node); return -ENOMEM; } diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c index 997c4df6a1e7..e4faf90feaf5 100644 --- a/drivers/pci/controller/pcie-rcar-host.c +++ b/drivers/pci/controller/pcie-rcar-host.c @@ -1072,7 +1072,7 @@ err_pm_put: return err; } -static int __maybe_unused rcar_pcie_resume(struct device *dev) +static int rcar_pcie_resume(struct device *dev) { struct rcar_pcie_host *host = dev_get_drvdata(dev); struct rcar_pcie *pcie = &host->pcie; @@ -1127,7 +1127,7 @@ static int rcar_pcie_resume_noirq(struct device *dev) } static const struct dev_pm_ops rcar_pcie_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(NULL, rcar_pcie_resume) + SYSTEM_SLEEP_PM_OPS(NULL, rcar_pcie_resume) .resume_noirq = rcar_pcie_resume_noirq, }; diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c index 7f56f99b4116..7352b5ff8d35 100644 --- a/drivers/pci/controller/pcie-rockchip-host.c +++ b/drivers/pci/controller/pcie-rockchip-host.c @@ -864,7 +864,7 @@ static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip) return 0; } -static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev) +static int rockchip_pcie_suspend_noirq(struct device *dev) { struct rockchip_pcie *rockchip = dev_get_drvdata(dev); int ret; @@ -889,7 +889,7 @@ static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev) return ret; } -static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev) +static int rockchip_pcie_resume_noirq(struct device *dev) { struct rockchip_pcie *rockchip = dev_get_drvdata(dev); int err; @@ -1035,8 +1035,8 @@ static int rockchip_pcie_remove(struct platform_device *pdev) } static const struct dev_pm_ops rockchip_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq, - rockchip_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq, + rockchip_pcie_resume_noirq) }; static const struct of_device_id rockchip_pcie_of_match[] = { diff --git a/drivers/pci/controller/pcie-xilinx-cpm.c b/drivers/pci/controller/pcie-xilinx-cpm.c index c7cd44ed4dfc..e4ab48041eb6 100644 --- a/drivers/pci/controller/pcie-xilinx-cpm.c +++ b/drivers/pci/controller/pcie-xilinx-cpm.c @@ -35,6 +35,10 @@ #define XILINX_CPM_PCIE_MISC_IR_ENABLE 0x00000348 #define XILINX_CPM_PCIE_MISC_IR_LOCAL BIT(1) +#define XILINX_CPM_PCIE_IR_STATUS 0x000002A0 +#define XILINX_CPM_PCIE_IR_ENABLE 0x000002A8 +#define XILINX_CPM_PCIE_IR_LOCAL BIT(0) + /* Interrupt registers definitions */ #define XILINX_CPM_PCIE_INTR_LINK_DOWN 0 #define XILINX_CPM_PCIE_INTR_HOT_RESET 3 @@ -98,6 +102,19 @@ /* Phy Status/Control Register definitions */ #define XILINX_CPM_PCIE_REG_PSCR_LNKUP BIT(11) +enum xilinx_cpm_version { + CPM, + CPM5, +}; + +/** + * struct xilinx_cpm_variant - CPM variant information + * @version: CPM version + */ +struct xilinx_cpm_variant { + enum xilinx_cpm_version version; +}; + /** * struct xilinx_cpm_pcie - PCIe port information * @dev: Device pointer @@ -109,6 +126,7 @@ * @intx_irq: legacy interrupt number * @irq: Error interrupt number * @lock: lock protecting shared register access + * @variant: CPM version check pointer */ struct xilinx_cpm_pcie { struct device *dev; @@ -120,6 +138,7 @@ struct xilinx_cpm_pcie { int intx_irq; int irq; raw_spinlock_t lock; + const struct xilinx_cpm_variant *variant; }; static u32 pcie_read(struct xilinx_cpm_pcie *port, u32 reg) @@ -285,6 +304,13 @@ static void xilinx_cpm_pcie_event_flow(struct irq_desc *desc) generic_handle_domain_irq(port->cpm_domain, i); pcie_write(port, val, XILINX_CPM_PCIE_REG_IDR); + if (port->variant->version == CPM5) { + val = readl_relaxed(port->cpm_base + XILINX_CPM_PCIE_IR_STATUS); + if (val) + writel_relaxed(val, port->cpm_base + + XILINX_CPM_PCIE_IR_STATUS); + } + /* * XILINX_CPM_PCIE_MISC_IR_STATUS register is mapped to * CPM SLCR block. @@ -484,6 +510,12 @@ static void xilinx_cpm_pcie_init_port(struct xilinx_cpm_pcie *port) */ writel(XILINX_CPM_PCIE_MISC_IR_LOCAL, port->cpm_base + XILINX_CPM_PCIE_MISC_IR_ENABLE); + + if (port->variant->version == CPM5) { + writel(XILINX_CPM_PCIE_IR_LOCAL, + port->cpm_base + XILINX_CPM_PCIE_IR_ENABLE); + } + /* Enable the Bridge enable bit */ pcie_write(port, pcie_read(port, XILINX_CPM_PCIE_REG_RPSC) | XILINX_CPM_PCIE_REG_RPSC_BEN, @@ -518,7 +550,14 @@ static int xilinx_cpm_pcie_parse_dt(struct xilinx_cpm_pcie *port, if (IS_ERR(port->cfg)) return PTR_ERR(port->cfg); - port->reg_base = port->cfg->win; + if (port->variant->version == CPM5) { + port->reg_base = devm_platform_ioremap_resource_byname(pdev, + "cpm_csr"); + if (IS_ERR(port->reg_base)) + return PTR_ERR(port->reg_base); + } else { + port->reg_base = port->cfg->win; + } return 0; } @@ -559,6 +598,8 @@ static int xilinx_cpm_pcie_probe(struct platform_device *pdev) if (!bus) return -ENODEV; + port->variant = of_device_get_match_data(dev); + err = xilinx_cpm_pcie_parse_dt(port, bus->res); if (err) { dev_err(dev, "Parsing DT failed\n"); @@ -591,8 +632,23 @@ err_parse_dt: return err; } +static const struct xilinx_cpm_variant cpm_host = { + .version = CPM, +}; + +static const struct xilinx_cpm_variant cpm5_host = { + .version = CPM5, +}; + static const struct of_device_id xilinx_cpm_pcie_of_match[] = { - { .compatible = "xlnx,versal-cpm-host-1.00", }, + { + .compatible = "xlnx,versal-cpm-host-1.00", + .data = &cpm_host, + }, + { + .compatible = "xlnx,versal-cpm5-host", + .data = &cpm5_host, + }, {} }; diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c index 94a14a3d7e55..e06e9f4fc50f 100644 --- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c @@ -898,7 +898,8 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id) if (vmd->instance < 0) return vmd->instance; - vmd->name = kasprintf(GFP_KERNEL, "vmd%d", vmd->instance); + vmd->name = devm_kasprintf(&dev->dev, GFP_KERNEL, "vmd%d", + vmd->instance); if (!vmd->name) { err = -ENOMEM; goto out_release_instance; @@ -936,7 +937,6 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id) out_release_instance: ida_simple_remove(&vmd_instance_ida, vmd->instance); - kfree(vmd->name); return err; } @@ -959,7 +959,6 @@ static void vmd_remove(struct pci_dev *dev) vmd_detach_resources(vmd); vmd_remove_irq_domain(vmd); ida_simple_remove(&vmd_instance_ida, vmd->instance); - kfree(vmd->name); } #ifdef CONFIG_PM_SLEEP @@ -1013,6 +1012,14 @@ static const struct pci_device_id vmd_ids[] = { .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | VMD_FEAT_HAS_BUS_RESTRICTIONS | VMD_FEAT_OFFSET_FIRST_VECTOR,}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7d0b), + .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | + VMD_FEAT_HAS_BUS_RESTRICTIONS | + VMD_FEAT_OFFSET_FIRST_VECTOR,}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xad0b), + .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | + VMD_FEAT_HAS_BUS_RESTRICTIONS | + VMD_FEAT_OFFSET_FIRST_VECTOR,}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B), .driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP | VMD_FEAT_HAS_BUS_RESTRICTIONS | diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 5b833f00e980..36b1801a061b 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -52,9 +52,11 @@ struct pci_epf_test { enum pci_barno test_reg_bar; size_t msix_table_offset; struct delayed_work cmd_handler; - struct dma_chan *dma_chan; + struct dma_chan *dma_chan_tx; + struct dma_chan *dma_chan_rx; struct completion transfer_complete; bool dma_supported; + bool dma_private; const struct pci_epc_features *epc_features; }; @@ -96,6 +98,8 @@ static void pci_epf_test_dma_callback(void *param) * @dma_src: The source address of the data transfer. It can be a physical * address given by pci_epc_mem_alloc_addr or DMA mapping APIs. * @len: The size of the data transfer + * @dma_remote: remote RC physical address + * @dir: DMA transfer direction * * Function that uses dmaengine API to transfer data between PCIe EP and remote * PCIe RC. The source and destination address can be a physical address given @@ -105,12 +109,16 @@ static void pci_epf_test_dma_callback(void *param) */ static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test, dma_addr_t dma_dst, dma_addr_t dma_src, - size_t len) + size_t len, dma_addr_t dma_remote, + enum dma_transfer_direction dir) { + struct dma_chan *chan = (dir == DMA_DEV_TO_MEM) ? + epf_test->dma_chan_tx : epf_test->dma_chan_rx; + dma_addr_t dma_local = (dir == DMA_MEM_TO_DEV) ? dma_src : dma_dst; enum dma_ctrl_flags flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; - struct dma_chan *chan = epf_test->dma_chan; struct pci_epf *epf = epf_test->epf; struct dma_async_tx_descriptor *tx; + struct dma_slave_config sconf = {}; struct device *dev = &epf->dev; dma_cookie_t cookie; int ret; @@ -120,7 +128,24 @@ static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test, return -EINVAL; } - tx = dmaengine_prep_dma_memcpy(chan, dma_dst, dma_src, len, flags); + if (epf_test->dma_private) { + sconf.direction = dir; + if (dir == DMA_MEM_TO_DEV) + sconf.dst_addr = dma_remote; + else + sconf.src_addr = dma_remote; + + if (dmaengine_slave_config(chan, &sconf)) { + dev_err(dev, "DMA slave config fail\n"); + return -EIO; + } + tx = dmaengine_prep_slave_single(chan, dma_local, len, dir, + flags); + } else { + tx = dmaengine_prep_dma_memcpy(chan, dma_dst, dma_src, len, + flags); + } + if (!tx) { dev_err(dev, "Failed to prepare DMA memcpy\n"); return -EIO; @@ -148,6 +173,23 @@ static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test, return 0; } +struct epf_dma_filter { + struct device *dev; + u32 dma_mask; +}; + +static bool epf_dma_filter_fn(struct dma_chan *chan, void *node) +{ + struct epf_dma_filter *filter = node; + struct dma_slave_caps caps; + + memset(&caps, 0, sizeof(caps)); + dma_get_slave_caps(chan, &caps); + + return chan->device->dev == filter->dev + && (filter->dma_mask & caps.directions); +} + /** * pci_epf_test_init_dma_chan() - Function to initialize EPF test DMA channel * @epf_test: the EPF test device that performs data transfer operation @@ -158,10 +200,44 @@ static int pci_epf_test_init_dma_chan(struct pci_epf_test *epf_test) { struct pci_epf *epf = epf_test->epf; struct device *dev = &epf->dev; + struct epf_dma_filter filter; struct dma_chan *dma_chan; dma_cap_mask_t mask; int ret; + filter.dev = epf->epc->dev.parent; + filter.dma_mask = BIT(DMA_DEV_TO_MEM); + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma_chan = dma_request_channel(mask, epf_dma_filter_fn, &filter); + if (!dma_chan) { + dev_info(dev, "Failed to get private DMA rx channel. Falling back to generic one\n"); + goto fail_back_tx; + } + + epf_test->dma_chan_rx = dma_chan; + + filter.dma_mask = BIT(DMA_MEM_TO_DEV); + dma_chan = dma_request_channel(mask, epf_dma_filter_fn, &filter); + + if (!dma_chan) { + dev_info(dev, "Failed to get private DMA tx channel. Falling back to generic one\n"); + goto fail_back_rx; + } + + epf_test->dma_chan_tx = dma_chan; + epf_test->dma_private = true; + + init_completion(&epf_test->transfer_complete); + + return 0; + +fail_back_rx: + dma_release_channel(epf_test->dma_chan_rx); + epf_test->dma_chan_tx = NULL; + +fail_back_tx: dma_cap_zero(mask); dma_cap_set(DMA_MEMCPY, mask); @@ -174,7 +250,7 @@ static int pci_epf_test_init_dma_chan(struct pci_epf_test *epf_test) } init_completion(&epf_test->transfer_complete); - epf_test->dma_chan = dma_chan; + epf_test->dma_chan_tx = epf_test->dma_chan_rx = dma_chan; return 0; } @@ -190,8 +266,17 @@ static void pci_epf_test_clean_dma_chan(struct pci_epf_test *epf_test) if (!epf_test->dma_supported) return; - dma_release_channel(epf_test->dma_chan); - epf_test->dma_chan = NULL; + dma_release_channel(epf_test->dma_chan_tx); + if (epf_test->dma_chan_tx == epf_test->dma_chan_rx) { + epf_test->dma_chan_tx = NULL; + epf_test->dma_chan_rx = NULL; + return; + } + + dma_release_channel(epf_test->dma_chan_rx); + epf_test->dma_chan_rx = NULL; + + return; } static void pci_epf_test_print_rate(const char *ops, u64 size, @@ -280,8 +365,15 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test) goto err_map_addr; } + if (epf_test->dma_private) { + dev_err(dev, "Cannot transfer data using DMA\n"); + ret = -EINVAL; + goto err_map_addr; + } + ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr, - src_phys_addr, reg->size); + src_phys_addr, reg->size, 0, + DMA_MEM_TO_MEM); if (ret) dev_err(dev, "Data transfer failed\n"); } else { @@ -373,7 +465,8 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test) ktime_get_ts64(&start); ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr, - phys_addr, reg->size); + phys_addr, reg->size, + reg->src_addr, DMA_DEV_TO_MEM); if (ret) dev_err(dev, "Data transfer failed\n"); ktime_get_ts64(&end); @@ -463,8 +556,11 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test) } ktime_get_ts64(&start); + ret = pci_epf_test_data_transfer(epf_test, phys_addr, - src_phys_addr, reg->size); + src_phys_addr, reg->size, + reg->dst_addr, + DMA_MEM_TO_DEV); if (ret) dev_err(dev, "Data transfer failed\n"); ktime_get_ts64(&end); @@ -627,7 +723,6 @@ static void pci_epf_test_unbind(struct pci_epf *epf) cancel_delayed_work(&epf_test->cmd_handler); pci_epf_test_clean_dma_chan(epf_test); - pci_epc_stop(epc); for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) { epf_bar = &epf->bar[bar]; diff --git a/drivers/pci/mmap.c b/drivers/pci/mmap.c index b8c9011987f4..4504039056d1 100644 --- a/drivers/pci/mmap.c +++ b/drivers/pci/mmap.c @@ -13,27 +13,6 @@ #ifdef ARCH_GENERIC_PCI_MMAP_RESOURCE -/* - * Modern setup: generic pci_mmap_resource_range(), and implement the legacy - * pci_mmap_page_range() (if needed) as a wrapper round it. - */ - -#ifdef HAVE_PCI_MMAP -int pci_mmap_page_range(struct pci_dev *pdev, int bar, - struct vm_area_struct *vma, - enum pci_mmap_state mmap_state, int write_combine) -{ - resource_size_t start, end; - - pci_resource_to_user(pdev, bar, &pdev->resource[bar], &start, &end); - - /* Adjust vm_pgoff to be the offset within the resource */ - vma->vm_pgoff -= start >> PAGE_SHIFT; - return pci_mmap_resource_range(pdev, bar, vma, mmap_state, - write_combine); -} -#endif - static const struct vm_operations_struct pci_phys_vm_ops = { #ifdef CONFIG_HAVE_IOREMAP_PROT .access = generic_access_phys, @@ -70,27 +49,4 @@ int pci_mmap_resource_range(struct pci_dev *pdev, int bar, vma->vm_page_prot); } -#elif defined(HAVE_PCI_MMAP) /* && !ARCH_GENERIC_PCI_MMAP_RESOURCE */ - -/* - * Legacy setup: Implement pci_mmap_resource_range() as a wrapper around - * the architecture's pci_mmap_page_range(), converting to "user visible" - * addresses as necessary. - */ - -int pci_mmap_resource_range(struct pci_dev *pdev, int bar, - struct vm_area_struct *vma, - enum pci_mmap_state mmap_state, int write_combine) -{ - resource_size_t start, end; - - /* - * pci_mmap_page_range() expects the same kind of entry as coming - * from /proc/bus/pci/ which is a "user visible" value. If this is - * different from the resource itself, arch will do necessary fixup. - */ - pci_resource_to_user(pdev, bar, &pdev->resource[bar], &start, &end); - vma->vm_pgoff += start >> PAGE_SHIFT; - return pci_mmap_page_range(pdev, bar, vma, mmap_state, write_combine); -} #endif diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 3760d85c10d2..a46fec776ad7 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -21,8 +21,9 @@ #include "pci.h" /* - * The GUID is defined in the PCI Firmware Specification available here: - * https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf + * The GUID is defined in the PCI Firmware Specification available + * here to PCI-SIG members: + * https://members.pcisig.com/wg/PCI-SIG/document/15350 */ const guid_t pci_acpi_dsm_guid = GUID_INIT(0xe5c937d0, 0x3553, 0x4d7a, diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index cfaf40a540a8..95bc329e74c0 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -41,8 +41,10 @@ const char *pci_power_names[] = { }; EXPORT_SYMBOL_GPL(pci_power_names); +#ifdef CONFIG_X86_32 int isa_dma_bridge_buggy; EXPORT_SYMBOL(isa_dma_bridge_buggy); +#endif int pci_pci_problems; EXPORT_SYMBOL(pci_pci_problems); @@ -1293,9 +1295,6 @@ static int pci_set_full_power_state(struct pci_dev *dev) pci_restore_bars(dev); } - if (dev->bus->self) - pcie_aspm_pm_state_change(dev->bus->self); - return 0; } @@ -1390,9 +1389,6 @@ static int pci_set_low_power_state(struct pci_dev *dev, pci_power_t state) pci_power_name(dev->current_state), pci_power_name(state)); - if (dev->bus->self) - pcie_aspm_pm_state_change(dev->bus->self); - return 0; } diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index e10cdec6c56e..785f31086313 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -560,12 +560,10 @@ bool pcie_wait_for_link(struct pci_dev *pdev, bool active); #ifdef CONFIG_PCIEASPM void pcie_aspm_init_link_state(struct pci_dev *pdev); void pcie_aspm_exit_link_state(struct pci_dev *pdev); -void pcie_aspm_pm_state_change(struct pci_dev *pdev); void pcie_aspm_powersave_config_link(struct pci_dev *pdev); #else static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { } static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { } -static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) { } static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { } #endif diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 7952e5efd6cf..e2d8a74f83c3 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -392,6 +392,11 @@ void pci_aer_init(struct pci_dev *dev) pci_add_ext_cap_save_buffer(dev, PCI_EXT_CAP_ID_ERR, sizeof(u32) * n); pci_aer_clear_status(dev); + + if (pci_aer_available()) + pci_enable_pcie_error_reporting(dev); + + pcie_set_ecrc_checking(dev); } void pci_aer_exit(struct pci_dev *dev) @@ -538,7 +543,7 @@ static const char *aer_agent_string[] = { u64 *stats = pdev->aer_stats->stats_array; \ size_t len = 0; \ \ - for (i = 0; i < ARRAY_SIZE(strings_array); i++) { \ + for (i = 0; i < ARRAY_SIZE(pdev->aer_stats->stats_array); i++) {\ if (strings_array[i]) \ len += sysfs_emit_at(buf, len, "%s %llu\n", \ strings_array[i], \ @@ -1228,9 +1233,6 @@ static int set_device_error_reporting(struct pci_dev *dev, void *data) pci_disable_pcie_error_reporting(dev); } - if (enable) - pcie_set_ecrc_checking(dev); - return 0; } @@ -1347,6 +1349,11 @@ static int aer_probe(struct pcie_device *dev) struct device *device = &dev->device; struct pci_dev *port = dev->port; + BUILD_BUG_ON(ARRAY_SIZE(aer_correctable_error_string) < + AER_MAX_TYPEOF_COR_ERRS); + BUILD_BUG_ON(ARRAY_SIZE(aer_uncorrectable_error_string) < + AER_MAX_TYPEOF_UNCOR_ERRS); + /* Limit to Root Ports or Root Complex Event Collectors */ if ((pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC) && (pci_pcie_type(port) != PCI_EXP_TYPE_ROOT_PORT)) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index a96b7424c9bc..a8aec190986c 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -1012,25 +1012,6 @@ out: up_read(&pci_bus_sem); } -/* @pdev: the root port or switch downstream port */ -void pcie_aspm_pm_state_change(struct pci_dev *pdev) -{ - struct pcie_link_state *link = pdev->link_state; - - if (aspm_disabled || !link) - return; - /* - * Devices changed PM state, we should recheck if latency - * meets all functions' requirement - */ - down_read(&pci_bus_sem); - mutex_lock(&aspm_lock); - pcie_update_aspm_capable(link->root); - pcie_config_aspm_path(link); - mutex_unlock(&aspm_lock); - up_read(&pci_bus_sem); -} - void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { struct pcie_link_state *link = pdev->link_state; @@ -1366,4 +1347,3 @@ bool pcie_aspm_support_enabled(void) { return aspm_support_enabled; } -EXPORT_SYMBOL(pcie_aspm_support_enabled); diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c index 0c5a143025af..59c90d04a609 100644 --- a/drivers/pci/pcie/err.c +++ b/drivers/pci/pcie/err.c @@ -55,10 +55,14 @@ static int report_error_detected(struct pci_dev *dev, device_lock(&dev->dev); pdrv = dev->driver; - if (!pci_dev_set_io_state(dev, state) || - !pdrv || - !pdrv->err_handler || - !pdrv->err_handler->error_detected) { + if (pci_dev_is_disconnected(dev)) { + vote = PCI_ERS_RESULT_DISCONNECT; + } else if (!pci_dev_set_io_state(dev, state)) { + pci_info(dev, "can't recover (state transition %u -> %u invalid)\n", + dev->error_state, state); + vote = PCI_ERS_RESULT_NONE; + } else if (!pdrv || !pdrv->err_handler || + !pdrv->err_handler->error_detected) { /* * If any device in the subtree does not have an error_detected * callback, PCI_ERS_RESULT_NO_AER_DRIVER prevents subsequent diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 604feeb84ee4..1ac7fec47d6f 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -222,15 +222,8 @@ static int get_port_device_capability(struct pci_dev *dev) #ifdef CONFIG_PCIEAER if (dev->aer_cap && pci_aer_available() && - (pcie_ports_native || host->native_aer)) { + (pcie_ports_native || host->native_aer)) services |= PCIE_PORT_SERVICE_AER; - - /* - * Disable AER on this port in case it's been enabled by the - * BIOS (the AER service driver will enable it when necessary). - */ - pci_disable_pcie_error_reporting(dev); - } #endif /* Root Ports and Root Complex Event Collectors may generate PMEs */ diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 17a969942d37..9884d8b29d3b 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1890,6 +1890,9 @@ int pci_setup_device(struct pci_dev *dev) dev->broken_intx_masking = pci_intx_mask_broken(dev); + /* Clear errors left from system firmware */ + pci_write_config_word(dev, PCI_STATUS, 0xffff); + switch (dev->hdr_type) { /* header type */ case PCI_HEADER_TYPE_NORMAL: /* standard header */ if (class == PCI_CLASS_BRIDGE_PCI) @@ -2579,33 +2582,39 @@ struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn) } EXPORT_SYMBOL(pci_scan_single_device); -static unsigned int next_fn(struct pci_bus *bus, struct pci_dev *dev, - unsigned int fn) +static int next_ari_fn(struct pci_bus *bus, struct pci_dev *dev, int fn) { int pos; u16 cap = 0; unsigned int next_fn; - if (pci_ari_enabled(bus)) { - if (!dev) - return 0; - pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI); - if (!pos) - return 0; + if (!dev) + return -ENODEV; - pci_read_config_word(dev, pos + PCI_ARI_CAP, &cap); - next_fn = PCI_ARI_CAP_NFN(cap); - if (next_fn <= fn) - return 0; /* protect against malformed list */ + pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI); + if (!pos) + return -ENODEV; - return next_fn; - } + pci_read_config_word(dev, pos + PCI_ARI_CAP, &cap); + next_fn = PCI_ARI_CAP_NFN(cap); + if (next_fn <= fn) + return -ENODEV; /* protect against malformed list */ - /* dev may be NULL for non-contiguous multifunction devices */ - if (!dev || dev->multifunction) - return (fn + 1) % 8; + return next_fn; +} - return 0; +static int next_fn(struct pci_bus *bus, struct pci_dev *dev, int fn) +{ + if (pci_ari_enabled(bus)) + return next_ari_fn(bus, dev, fn); + + if (fn >= 7) + return -ENODEV; + /* only multifunction devices may have more functions */ + if (dev && !dev->multifunction) + return -ENODEV; + + return fn + 1; } static int only_one_child(struct pci_bus *bus) @@ -2643,26 +2652,30 @@ static int only_one_child(struct pci_bus *bus) */ int pci_scan_slot(struct pci_bus *bus, int devfn) { - unsigned int fn, nr = 0; struct pci_dev *dev; + int fn = 0, nr = 0; if (only_one_child(bus) && (devfn > 0)) return 0; /* Already scanned the entire slot */ - dev = pci_scan_single_device(bus, devfn); - if (!dev) - return 0; - if (!pci_dev_is_added(dev)) - nr++; - - for (fn = next_fn(bus, dev, 0); fn > 0; fn = next_fn(bus, dev, fn)) { + do { dev = pci_scan_single_device(bus, devfn + fn); if (dev) { if (!pci_dev_is_added(dev)) nr++; - dev->multifunction = 1; + if (fn > 0) + dev->multifunction = 1; + } else if (fn == 0) { + /* + * Function 0 is required unless we are running on + * a hypervisor that passes through individual PCI + * functions. + */ + if (!hypervisor_isolated_pci_functions()) + break; } - } + fn = next_fn(bus, dev, fn); + } while (fn >= 0); /* Only one slot has PCIe device */ if (bus->self && nr) @@ -2858,29 +2871,14 @@ static unsigned int pci_scan_child_bus_extend(struct pci_bus *bus, { unsigned int used_buses, normal_bridges = 0, hotplug_bridges = 0; unsigned int start = bus->busn_res.start; - unsigned int devfn, fn, cmax, max = start; + unsigned int devfn, cmax, max = start; struct pci_dev *dev; - int nr_devs; dev_dbg(&bus->dev, "scanning bus\n"); /* Go find them, Rover! */ - for (devfn = 0; devfn < 256; devfn += 8) { - nr_devs = pci_scan_slot(bus, devfn); - - /* - * The Jailhouse hypervisor may pass individual functions of a - * multi-function device to a guest without passing function 0. - * Look for them as well. - */ - if (jailhouse_paravirt() && nr_devs == 0) { - for (fn = 1; fn < 8; fn++) { - dev = pci_scan_single_device(bus, devfn + fn); - if (dev) - dev->multifunction = 1; - } - } - } + for (devfn = 0; devfn < 256; devfn += 8) + pci_scan_slot(bus, devfn); /* Reserve buses for SR-IOV capability */ used_buses = pci_iov_bus_range(bus); diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c index 31b26d8ea6cc..f967709082d6 100644 --- a/drivers/pci/proc.c +++ b/drivers/pci/proc.c @@ -244,6 +244,7 @@ static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma) { struct pci_dev *dev = pde_data(file_inode(file)); struct pci_filp_private *fpriv = file->private_data; + resource_size_t start, end; int i, ret, write_combine = 0, res_bit = IORESOURCE_MEM; if (!capable(CAP_SYS_RAWIO) || @@ -278,7 +279,11 @@ static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma) iomem_is_exclusive(dev->resource[i].start)) return -EINVAL; - ret = pci_mmap_page_range(dev, i, vma, + pci_resource_to_user(dev, i, &dev->resource[i], &start, &end); + + /* Adjust vm_pgoff to be the offset within the resource */ + vma->vm_pgoff -= start >> PAGE_SHIFT; + ret = pci_mmap_resource_range(dev, i, vma, fpriv->mmap_state, write_combine); if (ret < 0) return ret; diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 41aeaa235132..4944798e75b5 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/export.h> #include <linux/pci.h> +#include <linux/isa-dma.h> /* isa_dma_bridge_buggy */ #include <linux/init.h> #include <linux/delay.h> #include <linux/acpi.h> @@ -30,7 +31,6 @@ #include <linux/pm_runtime.h> #include <linux/suspend.h> #include <linux/switchtec.h> -#include <asm/dma.h> /* isa_dma_bridge_buggy */ #include "pci.h" static ktime_t fixup_debug_start(struct pci_dev *dev, @@ -239,6 +239,7 @@ static void quirk_passive_release(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release); DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release); +#ifdef CONFIG_X86_32 /* * The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a * workaround but VIA don't answer queries. If you happen to have good @@ -265,6 +266,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs); +#endif /* * Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear @@ -2709,10 +2711,10 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, nvenet_msi_disable); /* - * PCIe spec r4.0 sec 7.7.1.2 and sec 7.7.2.2 say that if MSI/MSI-X is enabled, - * then the device can't use INTx interrupts. Tegra's PCIe root ports don't - * generate MSI interrupts for PME and AER events instead only INTx interrupts - * are generated. Though Tegra's PCIe root ports can generate MSI interrupts + * PCIe spec r6.0 sec 6.1.4.3 says that if MSI/MSI-X is enabled, the device + * can't use INTx interrupts. Tegra's PCIe Root Ports don't generate MSI + * interrupts for PME and AER events; instead only INTx interrupts are + * generated. Though Tegra's PCIe Root Ports can generate MSI interrupts * for other events, since PCIe specification doesn't support using a mix of * INTx and MSI/MSI-X, it is required to disable MSI interrupts to avoid port * service drivers registering their respective ISRs for MSIs. @@ -2760,6 +2762,15 @@ DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x10e5, DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x10e6, PCI_CLASS_BRIDGE_PCI, 8, pci_quirk_nvidia_tegra_disable_rp_msi); +DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x229a, + PCI_CLASS_BRIDGE_PCI, 8, + pci_quirk_nvidia_tegra_disable_rp_msi); +DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x229c, + PCI_CLASS_BRIDGE_PCI, 8, + pci_quirk_nvidia_tegra_disable_rp_msi); +DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x229e, + PCI_CLASS_BRIDGE_PCI, 8, + pci_quirk_nvidia_tegra_disable_rp_msi); /* * Some versions of the MCP55 bridge from Nvidia have a legacy IRQ routing @@ -4924,6 +4935,9 @@ static const struct pci_dev_acs_enabled { { PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs }, /* Broadcom multi-function device */ { PCI_VENDOR_ID_BROADCOM, 0x16D7, pci_quirk_mf_endpoint_acs }, + { PCI_VENDOR_ID_BROADCOM, 0x1750, pci_quirk_mf_endpoint_acs }, + { PCI_VENDOR_ID_BROADCOM, 0x1751, pci_quirk_mf_endpoint_acs }, + { PCI_VENDOR_ID_BROADCOM, 0x1752, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs }, /* Amazon Annapurna Labs */ { PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs }, diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c index c36c1238c604..75be4fe22509 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -1376,8 +1376,7 @@ static struct switchtec_dev *stdev_create(struct pci_dev *pdev) dev->groups = switchtec_device_groups; dev->release = stdev_release; - minor = ida_simple_get(&switchtec_minor_ida, 0, 0, - GFP_KERNEL); + minor = ida_alloc(&switchtec_minor_ida, GFP_KERNEL); if (minor < 0) { rc = minor; goto err_put; @@ -1692,7 +1691,7 @@ static int switchtec_pci_probe(struct pci_dev *pdev, err_devadd: stdev_kill(stdev); err_put: - ida_simple_remove(&switchtec_minor_ida, MINOR(stdev->dev.devt)); + ida_free(&switchtec_minor_ida, MINOR(stdev->dev.devt)); put_device(&stdev->dev); return rc; } @@ -1704,7 +1703,7 @@ static void switchtec_pci_remove(struct pci_dev *pdev) pci_set_drvdata(pdev, NULL); cdev_device_del(&stdev->cdev, &stdev->dev); - ida_simple_remove(&switchtec_minor_ida, MINOR(stdev->dev.devt)); + ida_free(&switchtec_minor_ida, MINOR(stdev->dev.devt)); dev_info(&stdev->dev, "unregistered.\n"); stdev_kill(stdev); put_device(&stdev->dev); |