diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-09-24 00:08:08 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-09-24 00:08:08 +0300 |
| commit | 8874d92b579bf86f61f044ab43a4cd961d112269 (patch) | |
| tree | 0fb95b1ab56d69196a5268541c5b96e305358d26 /drivers/dma | |
| parent | fbb86b0d5f38184873772a84ae50d5edd6a8b046 (diff) | |
| parent | e0bee4bcdc3238ebcae6e5960544b9e3d0a62abf (diff) | |
| download | linux-8874d92b579bf86f61f044ab43a4cd961d112269.tar.xz | |
Merge tag 'dmaengine-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
Pull dmaengine updates from Vinod Koul:
"Unusually, more new driver and device support than updates. Couple of
new device support, AMD, Rcar, Intel and New drivers in Freescale,
Loonsoon, AMD and LPC32XX with DT conversion and mode updates etc.
New support:
- Support for AMD Versal Gen 2 DMA IP
- Rcar RZ/G3S SoC dma controller
- Support for Intel Diamond Rapids and Granite Rapids-D dma controllers
- Support for Freescale ls1021a-qdma controller
- New driver for Loongson-1 APB DMA
- New driver for AMD QDMA
- Pl08x in LPC32XX router dma driver
Updates:
- Support for dpdma cyclic dma mode
- XML conversion for marvell xor dma bindings
- Dma clocks documentation for imx dma"
* tag 'dmaengine-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (24 commits)
dmaengine: loongson1-apb-dma: Fix the build warning caused by the size of pdev_irqname
dmaengine: Fix spelling mistakes
dmaengine: Add dma router for pl08x in LPC32XX SoC
dmaengine: fsl-edma: add edma src ID check at request channel
dmaengine: fsl-edma: change to guard(mutex) within fsl_edma3_xlate()
dmaengine: avoid non-constant format string
dmaengine: imx-dma: Remove i.MX21 support
dt-bindings: dma: fsl,imx-dma: Document the DMA clocks
dmaengine: Loongson1: Add Loongson-1 APB DMA driver
dt-bindings: dma: Add Loongson-1 APB DMA
dmaengine: zynqmp_dma: Add support for AMD Versal Gen 2 DMA IP
dt-bindings: dmaengine: zynqmp_dma: Add a new compatible string
dmaengine: idxd: Add new DSA and IAA device IDs for Diamond Rapids platform
dmaengine: idxd: Add a new DSA device ID for Granite Rapids-D platform
dmaengine: ti: k3-udma: Remove unused declarations
dmaengine: amd: qdma: Add AMD QDMA driver
dmaengine: xilinx: dpdma: Add support for cyclic dma mode
dma: ipu: Remove include/linux/dma/ipu-dma.h
dt-bindings: dma: fsl-mxs-dma: Add compatible string "fsl,imx8qxp-dma-apbh"
dt-bindings: fsl-qdma: allow compatible string fallback to fsl,ls1021a-qdma
...
Diffstat (limited to 'drivers/dma')
52 files changed, 2575 insertions, 65 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index cc0a62c34861..d9ec1e69e428 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -369,6 +369,15 @@ config K3_DMA Support the DMA engine for Hisilicon K3 platform devices. +config LOONGSON1_APB_DMA + tristate "Loongson1 APB DMA support" + depends on MACH_LOONGSON32 || COMPILE_TEST + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + help + This selects support for the APB DMA controller in Loongson1 SoCs, + which is required by Loongson1 NAND and audio support. + config LPC18XX_DMAMUX bool "NXP LPC18xx/43xx DMA MUX for PL080" depends on ARCH_LPC18XX || COMPILE_TEST @@ -378,6 +387,15 @@ config LPC18XX_DMAMUX Enable support for DMA on NXP LPC18xx/43xx platforms with PL080 and multiplexed DMA request lines. +config LPC32XX_DMAMUX + bool "NXP LPC32xx DMA MUX for PL080" + depends on ARCH_LPC32XX || COMPILE_TEST + depends on OF && AMBA_PL08X + select MFD_SYSCON + help + Support for PL080 multiplexed DMA request lines on + LPC32XX platrofm. + config LS2X_APB_DMA tristate "Loongson LS2X APB DMA support" depends on LOONGARCH || COMPILE_TEST @@ -716,6 +734,8 @@ config XILINX_ZYNQMP_DPDMA display driver. # driver files +source "drivers/dma/amd/Kconfig" + source "drivers/dma/bestcomm/Kconfig" source "drivers/dma/mediatek/Kconfig" diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile index 374ea98faf43..ad6a03c052ec 100644 --- a/drivers/dma/Makefile +++ b/drivers/dma/Makefile @@ -49,7 +49,9 @@ obj-$(CONFIG_INTEL_IDMA64) += idma64.o obj-$(CONFIG_INTEL_IOATDMA) += ioat/ obj-y += idxd/ obj-$(CONFIG_K3_DMA) += k3dma.o +obj-$(CONFIG_LOONGSON1_APB_DMA) += loongson1-apb-dma.o obj-$(CONFIG_LPC18XX_DMAMUX) += lpc18xx-dmamux.o +obj-$(CONFIG_LPC32XX_DMAMUX) += lpc32xx-dmamux.o obj-$(CONFIG_LS2X_APB_DMA) += ls2x-apb-dma.o obj-$(CONFIG_MILBEAUT_HDMAC) += milbeaut-hdmac.o obj-$(CONFIG_MILBEAUT_XDMAC) += milbeaut-xdmac.o @@ -83,6 +85,7 @@ obj-$(CONFIG_ST_FDMA) += st_fdma.o obj-$(CONFIG_FSL_DPAA2_QDMA) += fsl-dpaa2-qdma/ obj-$(CONFIG_INTEL_LDMA) += lgm/ +obj-y += amd/ obj-y += mediatek/ obj-y += qcom/ obj-y += stm32/ diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c index 5906eae26e2a..a58a1600dd65 100644 --- a/drivers/dma/acpi-dma.c +++ b/drivers/dma/acpi-dma.c @@ -112,7 +112,7 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp, } /** - * acpi_dma_parse_csrt - parse CSRT to exctract additional DMA resources + * acpi_dma_parse_csrt - parse CSRT to extract additional DMA resources * @adev: ACPI device to match with * @adma: struct acpi_dma of the given DMA controller * @@ -305,7 +305,7 @@ EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_free); * found. * * Return: - * 0, if no information is avaiable, -1 on mismatch, and 1 otherwise. + * 0, if no information is available, -1 on mismatch, and 1 otherwise. */ static int acpi_dma_update_dma_spec(struct acpi_dma *adma, struct acpi_dma_spec *dma_spec) diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c index 0968176f323d..e6a6566b309e 100644 --- a/drivers/dma/altera-msgdma.c +++ b/drivers/dma/altera-msgdma.c @@ -153,7 +153,7 @@ struct msgdma_extended_desc { /** * struct msgdma_sw_desc - implements a sw descriptor * @async_tx: support for the async_tx api - * @hw_desc: assosiated HW descriptor + * @hw_desc: associated HW descriptor * @node: node to move from the free list to the tx list * @tx_list: transmit list node */ @@ -511,7 +511,7 @@ static void msgdma_copy_one(struct msgdma_device *mdev, * of the DMA controller. The descriptor will get flushed to the * FIFO, once the last word (control word) is written. Since we * are not 100% sure that memcpy() writes all word in the "correct" - * oder (address from low to high) on all architectures, we make + * order (address from low to high) on all architectures, we make * sure this control word is written last by single coding it and * adding some write-barriers here. */ diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 73a5cfb4da8a..38cdbca59485 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -2,7 +2,7 @@ /* * Copyright (c) 2006 ARM Ltd. * Copyright (c) 2010 ST-Ericsson SA - * Copyirght (c) 2017 Linaro Ltd. + * Copyright (c) 2017 Linaro Ltd. * * Author: Peter Pearse <peter.pearse@arm.com> * Author: Linus Walleij <linus.walleij@linaro.org> diff --git a/drivers/dma/amd/Kconfig b/drivers/dma/amd/Kconfig new file mode 100644 index 000000000000..7d1f51d69675 --- /dev/null +++ b/drivers/dma/amd/Kconfig @@ -0,0 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config AMD_QDMA + tristate "AMD Queue-based DMA" + depends on HAS_IOMEM + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + select REGMAP_MMIO + help + Enable support for the AMD Queue-based DMA subsystem. The primary + mechanism to transfer data using the QDMA is for the QDMA engine to + operate on instructions (descriptors) provided by the host operating + system. Using the descriptors, the QDMA can move data in either the + Host to Card (H2C) direction or the Card to Host (C2H) direction. diff --git a/drivers/dma/amd/Makefile b/drivers/dma/amd/Makefile new file mode 100644 index 000000000000..37212be9364f --- /dev/null +++ b/drivers/dma/amd/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_AMD_QDMA) += qdma/ diff --git a/drivers/dma/amd/qdma/Makefile b/drivers/dma/amd/qdma/Makefile new file mode 100644 index 000000000000..011268fef377 --- /dev/null +++ b/drivers/dma/amd/qdma/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_AMD_QDMA) += amd-qdma.o + +amd-qdma-$(CONFIG_AMD_QDMA) := qdma.o qdma-comm-regs.o diff --git a/drivers/dma/amd/qdma/qdma-comm-regs.c b/drivers/dma/amd/qdma/qdma-comm-regs.c new file mode 100644 index 000000000000..9162f9d367cc --- /dev/null +++ b/drivers/dma/amd/qdma/qdma-comm-regs.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2023-2024, Advanced Micro Devices, Inc. + */ + +#ifndef __QDMA_REGS_DEF_H +#define __QDMA_REGS_DEF_H + +#include "qdma.h" + +const struct qdma_reg qdma_regos_default[QDMA_REGO_MAX] = { + [QDMA_REGO_CTXT_DATA] = QDMA_REGO(0x804, 8), + [QDMA_REGO_CTXT_CMD] = QDMA_REGO(0x844, 1), + [QDMA_REGO_CTXT_MASK] = QDMA_REGO(0x824, 8), + [QDMA_REGO_MM_H2C_CTRL] = QDMA_REGO(0x1004, 1), + [QDMA_REGO_MM_C2H_CTRL] = QDMA_REGO(0x1204, 1), + [QDMA_REGO_QUEUE_COUNT] = QDMA_REGO(0x120, 1), + [QDMA_REGO_RING_SIZE] = QDMA_REGO(0x204, 1), + [QDMA_REGO_H2C_PIDX] = QDMA_REGO(0x18004, 1), + [QDMA_REGO_C2H_PIDX] = QDMA_REGO(0x18008, 1), + [QDMA_REGO_INTR_CIDX] = QDMA_REGO(0x18000, 1), + [QDMA_REGO_FUNC_ID] = QDMA_REGO(0x12c, 1), + [QDMA_REGO_ERR_INT] = QDMA_REGO(0xb04, 1), + [QDMA_REGO_ERR_STAT] = QDMA_REGO(0x248, 1), +}; + +const struct qdma_reg_field qdma_regfs_default[QDMA_REGF_MAX] = { + /* QDMA_REGO_CTXT_DATA fields */ + [QDMA_REGF_IRQ_ENABLE] = QDMA_REGF(53, 53), + [QDMA_REGF_WBK_ENABLE] = QDMA_REGF(52, 52), + [QDMA_REGF_WBI_CHECK] = QDMA_REGF(34, 34), + [QDMA_REGF_IRQ_ARM] = QDMA_REGF(16, 16), + [QDMA_REGF_IRQ_VEC] = QDMA_REGF(138, 128), + [QDMA_REGF_IRQ_AGG] = QDMA_REGF(139, 139), + [QDMA_REGF_WBI_INTVL_ENABLE] = QDMA_REGF(35, 35), + [QDMA_REGF_MRKR_DISABLE] = QDMA_REGF(62, 62), + [QDMA_REGF_QUEUE_ENABLE] = QDMA_REGF(32, 32), + [QDMA_REGF_QUEUE_MODE] = QDMA_REGF(63, 63), + [QDMA_REGF_DESC_BASE] = QDMA_REGF(127, 64), + [QDMA_REGF_DESC_SIZE] = QDMA_REGF(49, 48), + [QDMA_REGF_RING_ID] = QDMA_REGF(47, 44), + [QDMA_REGF_QUEUE_BASE] = QDMA_REGF(11, 0), + [QDMA_REGF_QUEUE_MAX] = QDMA_REGF(44, 32), + [QDMA_REGF_FUNCTION_ID] = QDMA_REGF(24, 17), + [QDMA_REGF_INTR_AGG_BASE] = QDMA_REGF(66, 15), + [QDMA_REGF_INTR_VECTOR] = QDMA_REGF(11, 1), + [QDMA_REGF_INTR_SIZE] = QDMA_REGF(69, 67), + [QDMA_REGF_INTR_VALID] = QDMA_REGF(0, 0), + [QDMA_REGF_INTR_COLOR] = QDMA_REGF(14, 14), + [QDMA_REGF_INTR_FUNCTION_ID] = QDMA_REGF(125, 114), + /* QDMA_REGO_CTXT_CMD fields */ + [QDMA_REGF_CMD_INDX] = QDMA_REGF(19, 7), + [QDMA_REGF_CMD_CMD] = QDMA_REGF(6, 5), + [QDMA_REGF_CMD_TYPE] = QDMA_REGF(4, 1), + [QDMA_REGF_CMD_BUSY] = QDMA_REGF(0, 0), + /* QDMA_REGO_QUEUE_COUNT fields */ + [QDMA_REGF_QUEUE_COUNT] = QDMA_REGF(11, 0), + /* QDMA_REGO_ERR_INT fields */ + [QDMA_REGF_ERR_INT_FUNC] = QDMA_REGF(11, 0), + [QDMA_REGF_ERR_INT_VEC] = QDMA_REGF(22, 12), + [QDMA_REGF_ERR_INT_ARM] = QDMA_REGF(24, 24), +}; + +#endif /* __QDMA_REGS_DEF_H */ diff --git a/drivers/dma/amd/qdma/qdma.c b/drivers/dma/amd/qdma/qdma.c new file mode 100644 index 000000000000..b0a1f3ad851b --- /dev/null +++ b/drivers/dma/amd/qdma/qdma.c @@ -0,0 +1,1143 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * DMA driver for AMD Queue-based DMA Subsystem + * + * Copyright (C) 2023-2024, Advanced Micro Devices, Inc. + */ +#include <linux/bitfield.h> +#include <linux/bitops.h> +#include <linux/dmaengine.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/dma-map-ops.h> +#include <linux/platform_device.h> +#include <linux/platform_data/amd_qdma.h> +#include <linux/regmap.h> + +#include "qdma.h" + +#define CHAN_STR(q) (((q)->dir == DMA_MEM_TO_DEV) ? "H2C" : "C2H") +#define QDMA_REG_OFF(d, r) ((d)->roffs[r].off) + +/* MMIO regmap config for all QDMA registers */ +static const struct regmap_config qdma_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static inline struct qdma_queue *to_qdma_queue(struct dma_chan *chan) +{ + return container_of(chan, struct qdma_queue, vchan.chan); +} + +static inline struct qdma_mm_vdesc *to_qdma_vdesc(struct virt_dma_desc *vdesc) +{ + return container_of(vdesc, struct qdma_mm_vdesc, vdesc); +} + +static inline u32 qdma_get_intr_ring_idx(struct qdma_device *qdev) +{ + u32 idx; + + idx = qdev->qintr_rings[qdev->qintr_ring_idx++].ridx; + qdev->qintr_ring_idx %= qdev->qintr_ring_num; + + return idx; +} + +static u64 qdma_get_field(const struct qdma_device *qdev, const u32 *data, + enum qdma_reg_fields field) +{ + const struct qdma_reg_field *f = &qdev->rfields[field]; + u16 low_pos, hi_pos, low_bit, hi_bit; + u64 value = 0, mask; + + low_pos = f->lsb / BITS_PER_TYPE(*data); + hi_pos = f->msb / BITS_PER_TYPE(*data); + + if (low_pos == hi_pos) { + low_bit = f->lsb % BITS_PER_TYPE(*data); + hi_bit = f->msb % BITS_PER_TYPE(*data); + mask = GENMASK(hi_bit, low_bit); + value = (data[low_pos] & mask) >> low_bit; + } else if (hi_pos == low_pos + 1) { + low_bit = f->lsb % BITS_PER_TYPE(*data); + hi_bit = low_bit + (f->msb - f->lsb); + value = ((u64)data[hi_pos] << BITS_PER_TYPE(*data)) | + data[low_pos]; + mask = GENMASK_ULL(hi_bit, low_bit); + value = (value & mask) >> low_bit; + } else { + hi_bit = f->msb % BITS_PER_TYPE(*data); + mask = GENMASK(hi_bit, 0); + value = data[hi_pos] & mask; + low_bit = f->msb - f->lsb - hi_bit; + value <<= low_bit; + low_bit -= 32; + value |= (u64)data[hi_pos - 1] << low_bit; + mask = GENMASK(31, 32 - low_bit); + value |= (data[hi_pos - 2] & mask) >> low_bit; + } + + return value; +} + +static void qdma_set_field(const struct qdma_device *qdev, u32 *data, + enum qdma_reg_fields field, u64 value) +{ + const struct qdma_reg_field *f = &qdev->rfields[field]; + u16 low_pos, hi_pos, low_bit; + + low_pos = f->lsb / BITS_PER_TYPE(*data); + hi_pos = f->msb / BITS_PER_TYPE(*data); + low_bit = f->lsb % BITS_PER_TYPE(*data); + + data[low_pos++] |= value << low_bit; + if (low_pos <= hi_pos) + data[low_pos++] |= (u32)(value >> (32 - low_bit)); + if (low_pos <= hi_pos) + data[low_pos] |= (u32)(value >> (64 - low_bit)); +} + +static inline int qdma_reg_write(const struct qdma_device *qdev, + const u32 *data, enum qdma_regs reg) +{ + const struct qdma_reg *r = &qdev->roffs[reg]; + int ret; + + if (r->count > 1) + ret = regmap_bulk_write(qdev->regmap, r->off, data, r->count); + else + ret = regmap_write(qdev->regmap, r->off, *data); + + return ret; +} + +static inline int qdma_reg_read(const struct qdma_device *qdev, u32 *data, + enum qdma_regs reg) +{ + const struct qdma_reg *r = &qdev->roffs[reg]; + int ret; + + if (r->count > 1) + ret = regmap_bulk_read(qdev->regmap, r->off, data, r->count); + else + ret = regmap_read(qdev->regmap, r->off, data); + + return ret; +} + +static int qdma_context_cmd_execute(const struct qdma_device *qdev, + enum qdma_ctxt_type type, + enum qdma_ctxt_cmd cmd, u16 index) +{ + u32 value = 0; + int ret; + + qdma_set_field(qdev, &value, QDMA_REGF_CMD_INDX, index); + qdma_set_field(qdev, &value, QDMA_REGF_CMD_CMD, cmd); + qdma_set_field(qdev, &value, QDMA_REGF_CMD_TYPE, type); + + ret = qdma_reg_write(qdev, &value, QDMA_REGO_CTXT_CMD); + if (ret) + return ret; + + ret = regmap_read_poll_timeout(qdev->regmap, + QDMA_REG_OFF(qdev, QDMA_REGO_CTXT_CMD), + value, + !qdma_get_field(qdev, &value, + QDMA_REGF_CMD_BUSY), + QDMA_POLL_INTRVL_US, + QDMA_POLL_TIMEOUT_US); + if (ret) { + qdma_err(qdev, "Context command execution timed out"); + return ret; + } + + return 0; +} + +static int qdma_context_write_data(const struct qdma_device *qdev, + const u32 *data) +{ + u32 mask[QDMA_CTXT_REGMAP_LEN]; + int ret; + + memset(mask, ~0, sizeof(mask)); + + ret = qdma_reg_write(qdev, mask, QDMA_REGO_CTXT_MASK); + if (ret) + return ret; + + ret = qdma_reg_write(qdev, data, QDMA_REGO_CTXT_DATA); + if (ret) + return ret; + + return 0; +} + +static void qdma_prep_sw_desc_context(const struct qdma_device *qdev, + const struct qdma_ctxt_sw_desc *ctxt, + u32 *data) +{ + memset(data, 0, QDMA_CTXT_REGMAP_LEN * sizeof(*data)); + qdma_set_field(qdev, data, QDMA_REGF_DESC_BASE, ctxt->desc_base); + qdma_set_field(qdev, data, QDMA_REGF_IRQ_VEC, ctxt->vec); + qdma_set_field(qdev, data, QDMA_REGF_FUNCTION_ID, qdev->fid); + + qdma_set_field(qdev, data, QDMA_REGF_DESC_SIZE, QDMA_DESC_SIZE_32B); + qdma_set_field(qdev, data, QDMA_REGF_RING_ID, QDMA_DEFAULT_RING_ID); + qdma_set_field(qdev, data, QDMA_REGF_QUEUE_MODE, QDMA_QUEUE_OP_MM); + qdma_set_field(qdev, data, QDMA_REGF_IRQ_ENABLE, 1); + qdma_set_field(qdev, data, QDMA_REGF_WBK_ENABLE, 1); + qdma_set_field(qdev, data, QDMA_REGF_WBI_CHECK, 1); + qdma_set_field(qdev, data, QDMA_REGF_IRQ_ARM, 1); + qdma_set_field(qdev, data, QDMA_REGF_IRQ_AGG, 1); + qdma_set_field(qdev, data, QDMA_REGF_WBI_INTVL_ENABLE, 1); + qdma_set_field(qdev, data, QDMA_REGF_QUEUE_ENABLE, 1); + qdma_set_field(qdev, data, QDMA_REGF_MRKR_DISABLE, 1); +} + +static void qdma_prep_intr_context(const struct qdma_device *qdev, + const struct qdma_ctxt_intr *ctxt, + u32 *data) +{ + memset(data, 0, QDMA_CTXT_REGMAP_LEN * sizeof(*data)); + qdma_set_field(qdev, data, QDMA_REGF_INTR_AGG_BASE, ctxt->agg_base); + qdma_set_field(qdev, data, QDMA_REGF_INTR_VECTOR, ctxt->vec); + qdma_set_field(qdev, data, QDMA_REGF_INTR_SIZE, ctxt->size); + qdma_set_field(qdev, data, QDMA_REGF_INTR_VALID, ctxt->valid); + qdma_set_field(qdev, data, QDMA_REGF_INTR_COLOR, ctxt->color); + qdma_set_field(qdev, data, QDMA_REGF_INTR_FUNCTION_ID, qdev->fid); +} + +static void qdma_prep_fmap_context(const struct qdma_device *qdev, + const struct qdma_ctxt_fmap *ctxt, + u32 *data) +{ + memset(data, 0, QDMA_CTXT_REGMAP_LEN * sizeof(*data)); + qdma_set_field(qdev, data, QDMA_REGF_QUEUE_BASE, ctxt->qbase); + qdma_set_field(qdev, data, QDMA_REGF_QUEUE_MAX, ctxt->qmax); +} + +/* + * Program the indirect context register space + * + * Once the queue is enabled, context is dynamically updated by hardware. Any + * modification of the context through this API when the queue is enabled can + * result in unexpected behavior. Reading the context when the queue is enabled + * is not recommended as it can result in reduced performance. + */ +static int qdma_prog_context(struct qdma_device *qdev, enum qdma_ctxt_type type, + enum qdma_ctxt_cmd cmd, u16 index, u32 *ctxt) +{ + int ret; + + mutex_lock(&qdev->ctxt_lock); + if (cmd == QDMA_CTXT_WRITE) { + ret = qdma_context_write_data(qdev, ctxt); + if (ret) + goto failed; + } + + ret = qdma_context_cmd_execute(qdev, type, cmd, index); + if (ret) + goto failed; + + if (cmd == QDMA_CTXT_READ) { + ret = qdma_reg_read(qdev, ctxt, QDMA_REGO_CTXT_DATA); + if (ret) + goto failed; + } + +failed: + mutex_unlock(&qdev->ctxt_lock); + + return ret; +} + +static int qdma_check_queue_status(struct qdma_device *qdev, + enum dma_transfer_direction dir, u16 qid) +{ + u32 status, data[QDMA_CTXT_REGMAP_LEN] = {0}; + enum qdma_ctxt_type type; + int ret; + + if (dir == DMA_MEM_TO_DEV) + type = QDMA_CTXT_DESC_SW_H2C; + else + type = QDMA_CTXT_DESC_SW_C2H; + ret = qdma_prog_context(qdev, type, QDMA_CTXT_READ, qid, data); + if (ret) + return ret; + + status = qdma_get_field(qdev, data, QDMA_REGF_QUEUE_ENABLE); + if (status) { + qdma_err(qdev, "queue %d already in use", qid); + return -EBUSY; + } + + return 0; +} + +static int qdma_clear_queue_context(const struct qdma_queue *queue) +{ + enum qdma_ctxt_type h2c_types[] = { QDMA_CTXT_DESC_SW_H2C, + QDMA_CTXT_DESC_HW_H2C, + QDMA_CTXT_DESC_CR_H2C, + QDMA_CTXT_PFTCH, }; + enum qdma_ctxt_type c2h_types[] = { QDMA_CTXT_DESC_SW_C2H, + QDMA_CTXT_DESC_HW_C2H, + QDMA_CTXT_DESC_CR_C2H, + QDMA_CTXT_PFTCH, }; + struct qdma_device *qdev = queue->qdev; + enum qdma_ctxt_type *type; + int ret, num, i; + + if (queue->dir == DMA_MEM_TO_DEV) { + type = h2c_types; + num = ARRAY_SIZE(h2c_types); + } else { + type = c2h_types; + num = ARRAY_SIZE(c2h_types); + } + for (i = 0; i < num; i++) { + ret = qdma_prog_context(qdev, type[i], QDMA_CTXT_CLEAR, + queue->qid, NULL); + if (ret) { + qdma_err(qdev, "Failed to clear ctxt %d", type[i]); + return ret; + } + } + + return 0; +} + +static int qdma_setup_fmap_context(struct qdma_device *qdev) +{ + u32 ctxt[QDMA_CTXT_REGMAP_LEN]; + struct qdma_ctxt_fmap fmap; + int ret; + + ret = qdma_prog_context(qdev, QDMA_CTXT_FMAP, QDMA_CTXT_CLEAR, + qdev->fid, NULL); + if (ret) { + qdma_err(qdev, "Failed clearing context"); + return ret; + } + + fmap.qbase = 0; + fmap.qmax = qdev->chan_num * 2; + qdma_prep_fmap_context(qdev, &fmap, ctxt); + ret = qdma_prog_context(qdev, QDMA_CTXT_FMAP, QDMA_CTXT_WRITE, + qdev->fid, ctxt); + if (ret) + qdma_err(qdev, "Failed setup fmap, ret %d", ret); + + return ret; +} + +static int qdma_setup_queue_context(struct qdma_device *qdev, + const struct qdma_ctxt_sw_desc *sw_desc, + enum dma_transfer_direction dir, u16 qid) +{ + u32 ctxt[QDMA_CTXT_REGMAP_LEN]; + enum qdma_ctxt_type type; + int ret; + + if (dir == DMA_MEM_TO_DEV) + type = QDMA_CTXT_DESC_SW_H2C; + else + type = QDMA_CTXT_DESC_SW_C2H; + + qdma_prep_sw_desc_context(qdev, sw_desc, ctxt); + /* Setup SW descriptor context */ + ret = qdma_prog_context(qdev, type, QDMA_CTXT_WRITE, qid, ctxt); + if (ret) + qdma_err(qdev, "Failed setup SW desc ctxt for queue: %d", qid); + + return ret; +} + +/* + * Enable or disable memory-mapped DMA engines + * 1: enable, 0: disable + */ +static int qdma_sgdma_control(struct qdma_device *qdev, u32 ctrl) +{ + int ret; + + ret = qdma_reg_write(qdev, &ctrl, QDMA_REGO_MM_H2C_CTRL); + ret |= qdma_reg_write(qdev, &ctrl, QDMA_REGO_MM_C2H_CTRL); + + return ret; +} + +static int qdma_get_hw_info(struct qdma_device *qdev) +{ + struct qdma_platdata *pdata = dev_get_platdata(&qdev->pdev->dev); + u32 value = 0; + int ret; + + ret = qdma_reg_read(qdev, &value, QDMA_REGO_QUEUE_COUNT); + if (ret) + return ret; + + value = qdma_get_field(qdev, &value, QDMA_REGF_QUEUE_COUNT) + 1; + if (pdata->max_mm_channels * 2 > value) { + qdma_err(qdev, "not enough hw queues %d", value); + return -EINVAL; + } + qdev->chan_num = pdata->max_mm_channels; + + ret = qdma_reg_read(qdev, &qdev->fid, QDMA_REGO_FUNC_ID); + if (ret) + return ret; + + qdma_info(qdev, "max channel %d, function id %d", + qdev->chan_num, qdev->fid); + + return 0; +} + +static inline int qdma_update_pidx(const struct qdma_queue *queue, u16 pidx) +{ + struct qdma_device *qdev = queue->qdev; + + return regmap_write(qdev->regmap, queue->pidx_reg, + pidx | QDMA_QUEUE_ARM_BIT); +} + +static inline int qdma_update_cidx(const struct qdma_queue *queue, + u16 ridx, u16 cidx) +{ + struct qdma_device *qdev = queue->qdev; + + return regmap_write(qdev->regmap, queue->cidx_reg, + ((u32)ridx << 16) | cidx); +} + +/** + * qdma_free_vdesc - Free descriptor + * @vdesc: Virtual DMA descriptor + */ +static void qdma_free_vdesc(struct virt_dma_desc *vdesc) +{ + struct qdma_mm_vdesc *vd = to_qdma_vdesc(vdesc); + + kfree(vd); +} + +static int qdma_alloc_queues(struct qdma_device *qdev, + enum dma_transfer_direction dir) +{ + struct qdma_queue *q, **queues; + u32 i, pidx_base; + int ret; + + if (dir == DMA_MEM_TO_DEV) { + queues = &qdev->h2c_queues; + pidx_base = QDMA_REG_OFF(qdev, QDMA_REGO_H2C_PIDX); + } else { + queues = &qdev->c2h_queues; + pidx_base = QDMA_REG_OFF(qdev, QDMA_REGO_C2H_PIDX); + } + + *queues = devm_kcalloc(&qdev->pdev->dev, qdev->chan_num, sizeof(*q), + GFP_KERNEL); + if (!*queues) + return -ENOMEM; + + for (i = 0; i < qdev->chan_num; i++) { + ret = qdma_check_queue_status(qdev, dir, i); + if (ret) + return ret; + + q = &(*queues)[i]; + q->ring_size = QDMA_DEFAULT_RING_SIZE; + q->idx_mask = q->ring_size - 2; + q->qdev = qdev; + q->dir = dir; + q->qid = i; + q->pidx_reg = pidx_base + i * QDMA_DMAP_REG_STRIDE; + q->cidx_reg = QDMA_REG_OFF(qdev, QDMA_REGO_INTR_CIDX) + + i * QDMA_DMAP_REG_STRIDE; + q->vchan.desc_free = qdma_free_vdesc; + vchan_init(&q->vchan, &qdev->dma_dev); + } + + return 0; +} + +static int qdma_device_verify(struct qdma_device *qdev) +{ + u32 value; + int ret; + + ret = regmap_read(qdev->regmap, QDMA_IDENTIFIER_REGOFF, &value); + if (ret) + return ret; + + value = FIELD_GET(QDMA_IDENTIFIER_MASK, value); + if (value != QDMA_IDENTIFIER) { + qdma_err(qdev, "Invalid identifier"); + return -ENODEV; + } + qdev->rfields = qdma_regfs_default; + qdev->roffs = qdma_regos_default; + + return 0; +} + +static int qdma_device_setup(struct qdma_device *qdev) +{ + struct device *dev = &qdev->pdev->dev; + u32 ring_sz = QDMA_DEFAULT_RING_SIZE; + int ret = 0; + + while (dev && get_dma_ops(dev)) + dev = dev->parent; + if (!dev) { + qdma_err(qdev, "dma device not found"); + return -EINVAL; + } + set_dma_ops(&qdev->pdev->dev, get_dma_ops(dev)); + + ret = qdma_setup_fmap_context(qdev); + if (ret) { + qdma_err(qdev, "Failed setup fmap context"); + return ret; + } + + /* Setup global ring buffer size at QDMA_DEFAULT_RING_ID index */ + ret = qdma_reg_write(qdev, &ring_sz, QDMA_REGO_RING_SIZE); + if (ret) { + qdma_err(qdev, "Failed to setup ring %d of size %ld", + QDMA_DEFAULT_RING_ID, QDMA_DEFAULT_RING_SIZE); + return ret; + } + + /* Enable memory-mapped DMA engine in both directions */ + ret = qdma_sgdma_control(qdev, 1); + if (ret) { + qdma_err(qdev, "Failed to SGDMA with error %d", ret); + return ret; + } + + ret = qdma_alloc_queues(qdev, DMA_MEM_TO_DEV); + if (ret) { + qdma_err(qdev, "Failed to alloc H2C queues, ret %d", ret); + return ret; + } + + ret = qdma_alloc_queues(qdev, DMA_DEV_TO_MEM); + if (ret) { + qdma_err(qdev, "Failed to alloc C2H queues, ret %d", ret); + return ret; + } + + return 0; +} + +/** + * qdma_free_queue_resources() - Free queue resources + * @chan: DMA channel + */ +static void qdma_free_queue_resources(struct dma_chan *chan) +{ + struct qdma_queue *queue = to_qdma_queue(chan); + struct qdma_device *qdev = queue->qdev; + struct device *dev = qdev->dma_dev.dev; + + qdma_clear_queue_context(queue); + vchan_free_chan_resources(&queue->vchan); + dma_free_coherent(dev, queue->ring_size * QDMA_MM_DESC_SIZE, + queue->desc_base, queue->dma_desc_base); +} + +/** + * qdma_alloc_queue_resources() - Allocate queue resources + * @chan: DMA channel + */ +static int qdma_alloc_queue_resources(struct dma_chan *chan) +{ + struct qdma_queue *queue = to_qdma_queue(chan); + struct qdma_device *qdev = queue->qdev; + struct qdma_ctxt_sw_desc desc; + size_t size; + int ret; + + ret = qdma_clear_queue_context(queue); + if (ret) + return ret; + + size = queue->ring_size * QDMA_MM_DESC_SIZE; + queue->desc_base = dma_alloc_coherent(qdev->dma_dev.dev, size, + &queue->dma_desc_base, + GFP_KERNEL); + if (!queue->desc_base) { + qdma_err(qdev, "Failed to allocate descriptor ring"); + return -ENOMEM; + } + + /* Setup SW descriptor queue context for DMA memory map */ + desc.vec = qdma_get_intr_ring_idx(qdev); + desc.desc_base = queue->dma_desc_base; + ret = qdma_setup_queue_context(qdev, &desc, queue->dir, queue->qid); + if (ret) { + qdma_err(qdev, "Failed to setup SW desc ctxt for %s", + chan->name); + dma_free_coherent(qdev->dma_dev.dev, size, queue->desc_base, + queue->dma_desc_base); + return ret; + } + + queue->pidx = 0; + queue->cidx = 0; + + return 0; +} + +static bool qdma_filter_fn(struct dma_chan *chan, void *param) +{ + struct qdma_queue *queue = to_qdma_queue(chan); + struct qdma_queue_info *info = param; + + return info->dir == queue->dir; +} + +static int qdma_xfer_start(struct qdma_queue *queue) +{ + struct qdma_device *qdev = queue->qdev; + int ret; + + if (!vchan_next_desc(&queue->vchan)) + return 0; + + qdma_dbg(qdev, "Tnx kickoff with P: %d for %s%d", + queue->issued_vdesc->pidx, CHAN_STR(queue), queue->qid); + + ret = qdma_update_pidx(queue, queue->issued_vdesc->pidx); + if (ret) { + qdma_err(qdev, "Failed to update PIDX to %d for %s queue: %d", + queue->pidx, CHAN_STR(queue), queue->qid); + } + + return ret; +} + +static void qdma_issue_pending(struct dma_chan *chan) +{ + struct qdma_queue *queue = to_qdma_queue(chan); + unsigned long flags; + + spin_lock_irqsave(&queue->vchan.lock, flags); + if (vchan_issue_pending(&queue->vchan)) { + if (queue->submitted_vdesc) { + queue->issued_vdesc = queue->submitted_vdesc; + queue->submitted_vdesc = NULL; + } + qdma_xfer_start(queue); + } + + spin_unlock_irqrestore(&queue->vchan.lock, flags); +} + +static struct qdma_mm_desc *qdma_get_desc(struct qdma_queue *q) +{ + struct qdma_mm_desc *desc; + + if (((q->pidx + 1) & q->idx_mask) == q->cidx) + return NULL; + + desc = q->desc_base + q->pidx; + q->pidx = (q->pidx + 1) & q->idx_mask; + + return desc; +} + +static int qdma_hw_enqueue(struct qdma_queue *q, struct qdma_mm_vdesc *vdesc) +{ + struct qdma_mm_desc *desc; + struct scatterlist *sg; + u64 addr, *src, *dst; + u32 rest, len; + int ret = 0; + u32 i; + + if (!vdesc->sg_len) + return 0; + + if (q->dir == DMA_MEM_TO_DEV) { + dst = &vdesc->dev_addr; + src = &addr; + } else { + dst = &addr; + src = &vdesc->dev_addr; + } + + for_each_sg(vdesc->sgl, sg, vdesc->sg_len, i) { + addr = sg_dma_address(sg) + vdesc->sg_off; + rest = sg_dma_len(sg) - vdesc->sg_off; + while (rest) { + len = min_t(u32, rest, QDMA_MM_DESC_MAX_LEN); + desc = qdma_get_desc(q); + if (!desc) { + ret = -EBUSY; + goto out; + } + + desc->src_addr = cpu_to_le64(*src); + desc->dst_addr = cpu_to_le64(*dst); + desc->len = cpu_to_le32(len); + + vdesc->dev_addr += len; + vdesc->sg_off += len; + vdesc->pending_descs++; + addr += len; + rest -= len; + } + vdesc->sg_off = 0; + } +out: + vdesc->sg_len -= i; + vdesc->pidx = q->pidx; + return ret; +} + +static void qdma_fill_pending_vdesc(struct qdma_queue *q) +{ + struct virt_dma_chan *vc = &q->vchan; + struct qdma_mm_vdesc *vdesc = NULL; + struct virt_dma_desc *vd; + int ret; + + if (!list_empty(&vc->desc_issued)) { + vd = &q->issued_vdesc->vdesc; + list_for_each_entry_from(vd, &vc->desc_issued, node) { + vdesc = to_qdma_vdesc(vd); + ret = qdma_hw_enqueue(q, vdesc); + if (ret) { + q->issued_vdesc = vdesc; + return; + } + } + q->issued_vdesc = vdesc; + } + + if (list_empty(&vc->desc_submitted)) + return; + + if (q->submitted_vdesc) + vd = &q->submitted_vdesc->vdesc; + else + vd = list_first_entry(&vc->desc_submitted, typeof(*vd), node); + + list_for_each_entry_from(vd, &vc->desc_submitted, node) { + vdesc = to_qdma_vdesc(vd); + ret = qdma_hw_enqueue(q, vdesc); + if (ret) + break; + } + q->submitted_vdesc = vdesc; +} + +static dma_cookie_t qdma_tx_submit(struct dma_async_tx_descriptor *tx) +{ + struct virt_dma_chan *vc = to_virt_chan(tx->chan); + struct qdma_queue *q = to_qdma_queue(&vc->chan); + struct virt_dma_desc *vd; + unsigned long flags; + dma_cookie_t cookie; + + vd = container_of(tx, struct virt_dma_desc, tx); + spin_lock_irqsave(&vc->lock, flags); + cookie = dma_cookie_assign(tx); + + list_move_tail(&vd->node, &vc->desc_submitted); + qdma_fill_pending_vdesc(q); + spin_unlock_irqrestore(&vc->lock, flags); + + return cookie; +} + +static struct dma_async_tx_descriptor * +qdma_prep_device_sg(struct dma_chan *chan, struct scatterlist *sgl, + unsigned int sg_len, enum dma_transfer_direction dir, + unsigned long flags, void *context) +{ + struct qdma_queue *q = to_qdma_queue(chan); + struct dma_async_tx_descriptor *tx; + struct qdma_mm_vdesc *vdesc; + + vdesc = kzalloc(sizeof(*vdesc), GFP_NOWAIT); + if (!vdesc) + return NULL; + vdesc->sgl = sgl; + vdesc->sg_len = sg_len; + if (dir == DMA_MEM_TO_DEV) + vdesc->dev_addr = q->cfg.dst_addr; + else + vdesc->dev_addr = q->cfg.src_addr; + + tx = vchan_tx_prep(&q->vchan, &vdesc->vdesc, flags); + tx->tx_submit = qdma_tx_submit; + + return tx; +} + +static int qdma_device_config(struct dma_chan *chan, + struct dma_slave_config *cfg) +{ + struct qdma_queue *q = to_qdma_queue(chan); + + memcpy(&q->cfg, cfg, sizeof(*cfg)); + + return 0; +} + +static int qdma_arm_err_intr(const struct qdma_device *qdev) +{ + u32 value = 0; + + qdma_set_field(qdev, &value, QDMA_REGF_ERR_INT_FUNC, qdev->fid); + qdma_set_field(qdev, &value, QDMA_REGF_ERR_INT_VEC, qdev->err_irq_idx); + qdma_set_field(qdev, &value, QDMA_REGF_ERR_INT_ARM, 1); + + return qdma_reg_write(qdev, &value, QDMA_REGO_ERR_INT); +} + +static irqreturn_t qdma_error_isr(int irq, void *data) +{ + struct qdma_device *qdev = data; + u32 err_stat = 0; + int ret; + + ret = qdma_reg_read(qdev, &err_stat, QDMA_REGO_ERR_STAT); + if (ret) { + qdma_err(qdev, "read error state failed, ret %d", ret); + goto out; + } + + qdma_err(qdev, "global error %d", err_stat); + ret = qdma_reg_write(qdev, &err_stat, QDMA_REGO_ERR_STAT); + if (ret) + qdma_err(qdev, "clear error state failed, ret %d", ret); + +out: + qdma_arm_err_intr(qdev); + return IRQ_HANDLED; +} + +static irqreturn_t qdma_queue_isr(int irq, void *data) +{ + struct qdma_intr_ring *intr = data; + struct qdma_queue *q = NULL; + struct qdma_device *qdev; + u32 index, comp_desc; + u64 intr_ent; + u8 color; + int ret; + u16 qid; + + qdev = intr->qdev; + index = intr->cidx; + while (1) { + struct virt_dma_desc *vd; + struct qdma_mm_vdesc *vdesc; + unsigned long flags; + u32 cidx; + + intr_ent = le64_to_cpu(intr->base[index]); + color = FIELD_GET(QDMA_INTR_MASK_COLOR, intr_ent); + if (color != intr->color) + break; + + qid = FIELD_GET(QDMA_INTR_MASK_QID, intr_ent); + if (FIELD_GET(QDMA_INTR_MASK_TYPE, intr_ent)) + q = qdev->c2h_queues; + else + q = qdev->h2c_queues; + q += qid; + + cidx = FIELD_GET(QDMA_INTR_MASK_CIDX, intr_ent); + + spin_lock_irqsave(&q->vchan.lock, flags); + comp_desc = (cidx - q->cidx) & q->idx_mask; + + vd = vchan_next_desc(&q->vchan); + if (!vd) + goto skip; + + vdesc = to_qdma_vdesc(vd); + while (comp_desc > vdesc->pending_descs) { + list_del(&vd->node); + vchan_cookie_complete(vd); + comp_desc -= vdesc->pending_descs; + vd = vchan_next_desc(&q->vchan); + vdesc = to_qdma_vdesc(vd); + } + vdesc->pending_descs -= comp_desc; + if (!vdesc->pending_descs && QDMA_VDESC_QUEUED(vdesc)) { + list_del(&vd->node); + vchan_cookie_complete(vd); + } + q->cidx = cidx; + + qdma_fill_pending_vdesc(q); + qdma_xfer_start(q); + +skip: + spin_unlock_irqrestore(&q->vchan.lock, flags); + + /* + * Wrap the index value and flip the expected color value if + * interrupt aggregation PIDX has wrapped around. + */ + index++; + index &= QDMA_INTR_RING_IDX_MASK; + if (!index) + intr->color = !intr->color; + } + + /* + * Update the software interrupt aggregation ring CIDX if a valid entry + * was found. + */ + if (q) { + qdma_dbg(qdev, "update intr ring%d %d", intr->ridx, index); + + /* + * Record the last read index of status descriptor from the + * interrupt aggregation ring. + */ + intr->cidx = index; + + ret = qdma_update_cidx(q, intr->ridx, index); + if (ret) { + qdma_err(qdev, "Failed to update IRQ CIDX"); + return IRQ_NONE; + } + } + + return IRQ_HANDLED; +} + +static int qdma_init_error_irq(struct qdma_device *qdev) +{ + struct device *dev = &qdev->pdev->dev; + int ret; + u32 vec; + + vec = qdev->queue_irq_start - 1; + + ret = devm_request_threaded_irq(dev, vec, NULL, qdma_error_isr, + IRQF_ONESHOT, "amd-qdma-error", qdev); + if (ret) { + qdma_err(qdev, "Failed to request error IRQ vector: %d", vec); + return ret; + } + + ret = qdma_arm_err_intr(qdev); + if (ret) + qdma_err(qdev, "Failed to arm err interrupt, ret %d", ret); + + return ret; +} + +static int qdmam_alloc_qintr_rings(struct qdma_device *qdev) +{ + u32 ctxt[QDMA_CTXT_REGMAP_LEN]; + struct device *dev = &qdev->pdev->dev; + struct qdma_intr_ring *ring; + struct qdma_ctxt_intr intr_ctxt; + u32 vector; + int ret, i; + + qdev->qintr_ring_num = qdev->queue_irq_num; + qdev->qintr_rings = devm_kcalloc(dev, qdev->qintr_ring_num, + sizeof(*qdev->qintr_rings), + GFP_KERNEL); + if (!qdev->qintr_rings) + return -ENOMEM; + + vector = qdev->queue_irq_start; + for (i = 0; i < qdev->qintr_ring_num; i++, vector++) { + ring = &qdev->qintr_rings[i]; + ring->qdev = qdev; + ring->msix_id = qdev->err_irq_idx + i + 1; + ring->ridx = i; + ring->color = 1; + ring->base = dmam_alloc_coherent(dev, QDMA_INTR_RING_SIZE, + &ring->dev_base, GFP_KERNEL); + if (!ring->base) { + qdma_err(qdev, "Failed to alloc intr ring %d", i); + return -ENOMEM; + } + intr_ctxt.agg_base = QDMA_INTR_RING_BASE(ring->dev_base); + intr_ctxt.size = (QDMA_INTR_RING_SIZE - 1) / 4096; + intr_ctxt.vec = ring->msix_id; + intr_ctxt.valid = true; + intr_ctxt.color = true; + ret = qdma_prog_context(qdev, QDMA_CTXT_INTR_COAL, + QDMA_CTXT_CLEAR, ring->ridx, NULL); + if (ret) { + qdma_err(qdev, "Failed clear intr ctx, ret %d", ret); + return ret; + } + + qdma_prep_intr_context(qdev, &intr_ctxt, ctxt); + ret = qdma_prog_context(qdev, QDMA_CTXT_INTR_COAL, + QDMA_CTXT_WRITE, ring->ridx, ctxt); + if (ret) { + qdma_err(qdev, "Failed setup intr ctx, ret %d", ret); + return ret; + } + + ret = devm_request_threaded_irq(dev, vector, NULL, + qdma_queue_isr, IRQF_ONESHOT, + "amd-qdma-queue", ring); + if (ret) { + qdma_err(qdev, "Failed to request irq %d", vector); + return ret; + } + } + + return 0; +} + +static int qdma_intr_init(struct qdma_device *qdev) +{ + int ret; + + ret = qdma_init_error_irq(qdev); + if (ret) { + qdma_err(qdev, "Failed to init error IRQs, ret %d", ret); + return ret; + } + + ret = qdmam_alloc_qintr_rings(qdev); + if (ret) { + qdma_err(qdev, "Failed to init queue IRQs, ret %d", ret); + return ret; + } + + return 0; +} + +static void amd_qdma_remove(struct platform_device *pdev) +{ + struct qdma_device *qdev = platform_get_drvdata(pdev); + + qdma_sgdma_control(qdev, 0); + dma_async_device_unregister(&qdev->dma_dev); + + mutex_destroy(&qdev->ctxt_lock); +} + +static int amd_qdma_probe(struct platform_device *pdev) +{ + struct qdma_platdata *pdata = dev_get_platdata(&pdev->dev); + struct qdma_device *qdev; + struct resource *res; + void __iomem *regs; + int ret; + + qdev = devm_kzalloc(&pdev->dev, sizeof(*qdev), GFP_KERNEL); + if (!qdev) + return -ENOMEM; + + platform_set_drvdata(pdev, qdev); + qdev->pdev = pdev; + mutex_init(&qdev->ctxt_lock); + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + qdma_err(qdev, "Failed to get IRQ resource"); + ret = -ENODEV; + goto failed; + } + qdev->err_irq_idx = pdata->irq_index; + qdev->queue_irq_start = res->start + 1; + qdev->queue_irq_num = resource_size(res) - 1; + + regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); + if (IS_ERR(regs)) { + ret = PTR_ERR(regs); + qdma_err(qdev, "Failed to map IO resource, err %d", ret); + goto failed; + } + + qdev->regmap = devm_regmap_init_mmio(&pdev->dev, regs, + &qdma_regmap_config); + if (IS_ERR(qdev->regmap)) { + ret = PTR_ERR(qdev->regmap); + qdma_err(qdev, "Regmap init failed, err %d", ret); + goto failed; + } + + ret = qdma_device_verify(qdev); + if (ret) + goto failed; + + ret = qdma_get_hw_info(qdev); + if (ret) + goto failed; + + INIT_LIST_HEAD(&qdev->dma_dev.channels); + + ret = qdma_device_setup(qdev); + if (ret) + goto failed; + + ret = qdma_intr_init(qdev); + if (ret) { + qdma_err(qdev, "Failed to initialize IRQs %d", ret); + goto failed_disable_engine; + } + + dma_cap_set(DMA_SLAVE, qdev->dma_dev.cap_mask); + dma_cap_set(DMA_PRIVATE, qdev->dma_dev.cap_mask); + + qdev->dma_dev.dev = &pdev->dev; + qdev->dma_dev.filter.map = pdata->device_map; + qdev->dma_dev.filter.mapcnt = qdev->chan_num * 2; + qdev->dma_dev.filter.fn = qdma_filter_fn; + qdev->dma_dev.device_alloc_chan_resources = qdma_alloc_queue_resources; + qdev->dma_dev.device_free_chan_resources = qdma_free_queue_resources; + qdev->dma_dev.device_prep_slave_sg = qdma_prep_device_sg; + qdev->dma_dev.device_config = qdma_device_config; + qdev->dma_dev.device_issue_pending = qdma_issue_pending; + qdev->dma_dev.device_tx_status = dma_cookie_status; + qdev->dma_dev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); + + ret = dma_async_device_register(&qdev->dma_dev); + if (ret) { + qdma_err(qdev, "Failed to register AMD QDMA: %d", ret); + goto failed_disable_engine; + } + + return 0; + +failed_disable_engine: + qdma_sgdma_control(qdev, 0); +failed: + mutex_destroy(&qdev->ctxt_lock); + qdma_err(qdev, "Failed to probe AMD QDMA driver"); + return ret; +} + +static struct platform_driver amd_qdma_driver = { + .driver = { + .name = "amd-qdma", + }, + .probe = amd_qdma_probe, + .remove_new = amd_qdma_remove, +}; + +module_platform_driver(amd_qdma_driver); + +MODULE_DESCRIPTION("AMD QDMA driver"); +MODULE_AUTHOR("XRT Team <runtimeca39d@amd.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/dma/amd/qdma/qdma.h b/drivers/dma/amd/qdma/qdma.h new file mode 100644 index 000000000000..94089f1f0c11 --- /dev/null +++ b/drivers/dma/amd/qdma/qdma.h @@ -0,0 +1,266 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * DMA header for AMD Queue-based DMA Subsystem + * + * Copyright (C) 2023-2024, Advanced Micro Devices, Inc. + */ + +#ifndef __QDMA_H +#define __QDMA_H + +#include <linux/bitfield.h> +#include <linux/dmaengine.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include "../../virt-dma.h" + +#define DISABLE 0 +#define ENABLE 1 + +#define QDMA_MIN_IRQ 3 +#define QDMA_INTR_NAME_MAX_LEN 30 +#define QDMA_INTR_PREFIX "amd-qdma" + +#define QDMA_IDENTIFIER 0x1FD3 +#define QDMA_DEFAULT_RING_SIZE (BIT(10) + 1) +#define QDMA_DEFAULT_RING_ID 0 +#define QDMA_POLL_INTRVL_US 10 /* 10us */ +#define QDMA_POLL_TIMEOUT_US (500 * 1000) /* 500ms */ +#define QDMA_DMAP_REG_STRIDE 16 +#define QDMA_CTXT_REGMAP_LEN 8 /* 8 regs */ +#define QDMA_MM_DESC_SIZE 32 /* Bytes */ +#define QDMA_MM_DESC_LEN_BITS 28 +#define QDMA_MM_DESC_MAX_LEN (BIT(QDMA_MM_DESC_LEN_BITS) - 1) +#define QDMA_MIN_DMA_ALLOC_SIZE 4096 +#define QDMA_INTR_RING_SIZE BIT(13) +#define QDMA_INTR_RING_IDX_MASK GENMASK(9, 0) +#define QDMA_INTR_RING_BASE(_addr) ((_addr) >> 12) + +#define QDMA_IDENTIFIER_REGOFF 0x0 +#define QDMA_IDENTIFIER_MASK GENMASK(31, 16) +#define QDMA_QUEUE_ARM_BIT BIT(16) + +#define qdma_err(qdev, fmt, args...) \ + dev_err(&(qdev)->pdev->dev, fmt, ##args) + +#define qdma_dbg(qdev, fmt, args...) \ + dev_dbg(&(qdev)->pdev->dev, fmt, ##args) + +#define qdma_info(qdev, fmt, args...) \ + dev_info(&(qdev)->pdev->dev, fmt, ##args) + +enum qdma_reg_fields { + QDMA_REGF_IRQ_ENABLE, + QDMA_REGF_WBK_ENABLE, + QDMA_REGF_WBI_CHECK, + QDMA_REGF_IRQ_ARM, + QDMA_REGF_IRQ_VEC, + QDMA_REGF_IRQ_AGG, + QDMA_REGF_WBI_INTVL_ENABLE, + QDMA_REGF_MRKR_DISABLE, + QDMA_REGF_QUEUE_ENABLE, + QDMA_REGF_QUEUE_MODE, + QDMA_REGF_DESC_BASE, + QDMA_REGF_DESC_SIZE, + QDMA_REGF_RING_ID, + QDMA_REGF_CMD_INDX, + QDMA_REGF_CMD_CMD, + QDMA_REGF_CMD_TYPE, + QDMA_REGF_CMD_BUSY, + QDMA_REGF_QUEUE_COUNT, + QDMA_REGF_QUEUE_MAX, + QDMA_REGF_QUEUE_BASE, + QDMA_REGF_FUNCTION_ID, + QDMA_REGF_INTR_AGG_BASE, + QDMA_REGF_INTR_VECTOR, + QDMA_REGF_INTR_SIZE, + QDMA_REGF_INTR_VALID, + QDMA_REGF_INTR_COLOR, + QDMA_REGF_INTR_FUNCTION_ID, + QDMA_REGF_ERR_INT_FUNC, + QDMA_REGF_ERR_INT_VEC, + QDMA_REGF_ERR_INT_ARM, + QDMA_REGF_MAX +}; + +enum qdma_regs { + QDMA_REGO_CTXT_DATA, + QDMA_REGO_CTXT_CMD, + QDMA_REGO_CTXT_MASK, + QDMA_REGO_MM_H2C_CTRL, + QDMA_REGO_MM_C2H_CTRL, + QDMA_REGO_QUEUE_COUNT, + QDMA_REGO_RING_SIZE, + QDMA_REGO_H2C_PIDX, + QDMA_REGO_C2H_PIDX, + QDMA_REGO_INTR_CIDX, + QDMA_REGO_FUNC_ID, + QDMA_REGO_ERR_INT, + QDMA_REGO_ERR_STAT, + QDMA_REGO_MAX +}; + +struct qdma_reg_field { + u16 lsb; /* Least significant bit of field */ + u16 msb; /* Most significant bit of field */ +}; + +struct qdma_reg { + u32 off; + u32 count; +}; + +#define QDMA_REGF(_msb, _lsb) { \ + .lsb = (_lsb), \ + .msb = (_msb), \ +} + +#define QDMA_REGO(_off, _count) { \ + .off = (_off), \ + .count = (_count), \ +} + +enum qdma_desc_size { + QDMA_DESC_SIZE_8B, + QDMA_DESC_SIZE_16B, + QDMA_DESC_SIZE_32B, + QDMA_DESC_SIZE_64B, +}; + +enum qdma_queue_op_mode { + QDMA_QUEUE_OP_STREAM, + QDMA_QUEUE_OP_MM, +}; + +enum qdma_ctxt_type { + QDMA_CTXT_DESC_SW_C2H, + QDMA_CTXT_DESC_SW_H2C, + QDMA_CTXT_DESC_HW_C2H, + QDMA_CTXT_DESC_HW_H2C, + QDMA_CTXT_DESC_CR_C2H, + QDMA_CTXT_DESC_CR_H2C, + QDMA_CTXT_WRB, + QDMA_CTXT_PFTCH, + QDMA_CTXT_INTR_COAL, + QDMA_CTXT_RSVD, + QDMA_CTXT_HOST_PROFILE, + QDMA_CTXT_TIMER, + QDMA_CTXT_FMAP, + QDMA_CTXT_FNC_STS, +}; + +enum qdma_ctxt_cmd { + QDMA_CTXT_CLEAR, + QDMA_CTXT_WRITE, + QDMA_CTXT_READ, + QDMA_CTXT_INVALIDATE, + QDMA_CTXT_MAX +}; + +struct qdma_ctxt_sw_desc { + u64 desc_base; + u16 vec; +}; + +struct qdma_ctxt_intr { + u64 agg_base; + u16 vec; + u32 size; + bool valid; + bool color; +}; + +struct qdma_ctxt_fmap { + u16 qbase; + u16 qmax; +}; + +struct qdma_device; + +struct qdma_mm_desc { + __le64 src_addr; + __le32 len; + __le32 reserved1; + __le64 dst_addr; + __le64 reserved2; +} __packed; + +struct qdma_mm_vdesc { + struct virt_dma_desc vdesc; + struct qdma_queue *queue; + struct scatterlist *sgl; + u64 sg_off; + u32 sg_len; + u64 dev_addr; + u32 pidx; + u32 pending_descs; + struct dma_slave_config cfg; +}; + +#define QDMA_VDESC_QUEUED(vdesc) (!(vdesc)->sg_len) + +struct qdma_queue { + struct qdma_device *qdev; + struct virt_dma_chan vchan; + enum dma_transfer_direction dir; + struct dma_slave_config cfg; + struct qdma_mm_desc *desc_base; + struct qdma_mm_vdesc *submitted_vdesc; + struct qdma_mm_vdesc *issued_vdesc; + dma_addr_t dma_desc_base; + u32 pidx_reg; + u32 cidx_reg; + u32 ring_size; + u32 idx_mask; + u16 qid; + u32 pidx; + u32 cidx; +}; + +struct qdma_intr_ring { + struct qdma_device *qdev; + __le64 *base; + dma_addr_t dev_base; + char msix_name[QDMA_INTR_NAME_MAX_LEN]; + u32 msix_vector; + u16 msix_id; + u32 ring_size; + u16 ridx; + u16 cidx; + u8 color; +}; + +#define QDMA_INTR_MASK_PIDX GENMASK_ULL(15, 0) +#define QDMA_INTR_MASK_CIDX GENMASK_ULL(31, 16) +#define QDMA_INTR_MASK_DESC_COLOR GENMASK_ULL(32, 32) +#define QDMA_INTR_MASK_STATE GENMASK_ULL(34, 33) +#define QDMA_INTR_MASK_ERROR GENMASK_ULL(36, 35) +#define QDMA_INTR_MASK_TYPE GENMASK_ULL(38, 38) +#define QDMA_INTR_MASK_QID GENMASK_ULL(62, 39) +#define QDMA_INTR_MASK_COLOR GENMASK_ULL(63, 63) + +struct qdma_device { + struct platform_device *pdev; + struct dma_device dma_dev; + struct regmap *regmap; + struct mutex ctxt_lock; /* protect ctxt registers */ + const struct qdma_reg_field *rfields; + const struct qdma_reg *roffs; + struct qdma_queue *h2c_queues; + struct qdma_queue *c2h_queues; + struct qdma_intr_ring *qintr_rings; + u32 qintr_ring_num; + u32 qintr_ring_idx; + u32 chan_num; + u32 queue_irq_start; + u32 queue_irq_num; + u32 err_irq_idx; + u32 fid; +}; + +extern const struct qdma_reg qdma_regos_default[QDMA_REGO_MAX]; +extern const struct qdma_reg_field qdma_regfs_default[QDMA_REGF_MAX]; + +#endif /* __QDMA_H */ diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 40052d1bd0b5..baebddc740b0 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -339,7 +339,7 @@ static inline u8 convert_buswidth(enum dma_slave_buswidth addr_width) * @regs: memory mapped register base * @clk: dma controller clock * @save_imr: interrupt mask register that is saved on suspend/resume cycle - * @all_chan_mask: all channels availlable in a mask + * @all_chan_mask: all channels available in a mask * @lli_pool: hw lli table * @memset_pool: hw memset pool * @chan: channels table to store at_dma_chan structures @@ -668,7 +668,7 @@ static inline u32 atc_calc_bytes_left(u32 current_len, u32 ctrla) * CTRLA is read in turn, next the DSCR is read a second time. If the two * consecutive read values of the DSCR are the same then we assume both refers * to the very same LLI as well as the CTRLA value read inbetween does. For - * cyclic tranfers, the assumption is that a full loop is "not so fast". If the + * cyclic transfers, the assumption is that a full loop is "not so fast". If the * two DSCR values are different, we read again the CTRLA then the DSCR till two * consecutive read values from DSCR are equal or till the maximum trials is * reach. This algorithm is very unlikely not to find a stable value for DSCR. @@ -700,7 +700,7 @@ static int atc_get_llis_residue(struct at_dma_chan *atchan, break; /* - * DSCR has changed inside the DMA controller, so the previouly + * DSCR has changed inside the DMA controller, so the previously * read value of CTRLA may refer to an already processed * descriptor hence could be outdated. We need to update ctrla * to match the current descriptor. diff --git a/drivers/dma/bcm-sba-raid.c b/drivers/dma/bcm-sba-raid.c index fbaacb4c19b2..cfa6e1167a1f 100644 --- a/drivers/dma/bcm-sba-raid.c +++ b/drivers/dma/bcm-sba-raid.c @@ -15,7 +15,7 @@ * number of hardware rings over one or more SBA hardware devices. By * design, the internal buffer size of SBA hardware device is limited * but all offload operations supported by SBA can be broken down into - * multiple small size requests and executed parallely on multiple SBA + * multiple small size requests and executed parallelly on multiple SBA * hardware devices for achieving high through-put. * * The Broadcom SBA RAID driver does not require any register programming @@ -135,7 +135,7 @@ struct sba_device { u32 max_xor_srcs; u32 max_resp_pool_size; u32 max_cmds_pool_size; - /* Maibox client and Mailbox channels */ + /* Mailbox client and Mailbox channels */ struct mbox_client client; struct mbox_chan *mchan; struct device *mbox_dev; diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c index 9d74fe97452e..e1b92b4d7b05 100644 --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -369,7 +369,7 @@ static struct bcm2835_desc *bcm2835_dma_create_cb_chain( /* the last frame requires extra flags */ d->cb_list[d->frames - 1].cb->info |= finalextrainfo; - /* detect a size missmatch */ + /* detect a size mismatch */ if (buf_len && (d->size != buf_len)) goto error_cb; diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index c380a4dda77a..c1357d7f3dc6 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -1070,7 +1070,7 @@ static int __dma_async_device_channel_register(struct dma_device *device, if (!name) dev_set_name(&chan->dev->device, "dma%dchan%d", device->dev_id, chan->chan_id); else - dev_set_name(&chan->dev->device, name); + dev_set_name(&chan->dev->device, "%s", name); rc = device_register(&chan->dev->device); if (rc) goto err_out_ida; diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index 1f201a542b37..91b2fbc0b864 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -500,7 +500,7 @@ static unsigned long long dmatest_persec(s64 runtime, unsigned int val) per_sec *= val; per_sec = INT_TO_FIXPT(per_sec); - do_div(per_sec, runtime); + do_div(per_sec, (u32)runtime); return per_sec; } diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c index d6c60635e90d..4ee337e78c23 100644 --- a/drivers/dma/ep93xx_dma.c +++ b/drivers/dma/ep93xx_dma.c @@ -841,7 +841,7 @@ static dma_cookie_t ep93xx_dma_tx_submit(struct dma_async_tx_descriptor *tx) desc = container_of(tx, struct ep93xx_dma_desc, txd); /* - * If nothing is currently prosessed, we push this descriptor + * If nothing is currently processed, we push this descriptor * directly to the hardware. Otherwise we put the descriptor * to the pending queue. */ @@ -1025,7 +1025,7 @@ fail: * @chan: channel * @sgl: list of buffers to transfer * @sg_len: number of entries in @sgl - * @dir: direction of tha DMA transfer + * @dir: direction of the DMA transfer * @flags: flags for the descriptor * @context: operation context (ignored) * diff --git a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h index 2c80077cb7c0..36c284a3d184 100644 --- a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h +++ b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h @@ -12,8 +12,8 @@ struct dpaa2_qdma_sd_d { u32 rsv:32; union { struct { - u32 ssd:12; /* souce stride distance */ - u32 sss:12; /* souce stride size */ + u32 ssd:12; /* source stride distance */ + u32 sss:12; /* source stride size */ u32 rsv1:8; } sdf; struct { @@ -48,7 +48,7 @@ struct dpaa2_qdma_sd_d { #define QDMA_SER_DISABLE (8) /* no notification */ #define QDMA_SER_CTX BIT(8) /* notification by FQD_CTX[fqid] */ #define QDMA_SER_DEST (2 << 8) /* notification by destination desc */ -#define QDMA_SER_BOTH (3 << 8) /* soruce and dest notification */ +#define QDMA_SER_BOTH (3 << 8) /* source and dest notification */ #define QDMA_FD_SPF_ENALBE BIT(30) /* source prefetch enable */ #define QMAN_FD_VA_ENABLE BIT(14) /* Address used is virtual address */ diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index c66185c5a199..f9f1eda79254 100644 --- a/drivers/dma/fsl-edma-main.c +++ b/drivers/dma/fsl-edma-main.c @@ -100,6 +100,22 @@ static irqreturn_t fsl_edma_irq_handler(int irq, void *dev_id) return fsl_edma_err_handler(irq, dev_id); } +static bool fsl_edma_srcid_in_use(struct fsl_edma_engine *fsl_edma, u32 srcid) +{ + struct fsl_edma_chan *fsl_chan; + int i; + + for (i = 0; i < fsl_edma->n_chans; i++) { + fsl_chan = &fsl_edma->chans[i]; + + if (fsl_chan->srcid && srcid == fsl_chan->srcid) { + dev_err(&fsl_chan->pdev->dev, "The srcid is in use, can't use!"); + return true; + } + } + return false; +} + static struct dma_chan *fsl_edma_xlate(struct of_phandle_args *dma_spec, struct of_dma *ofdma) { @@ -117,6 +133,10 @@ static struct dma_chan *fsl_edma_xlate(struct of_phandle_args *dma_spec, list_for_each_entry_safe(chan, _chan, &fsl_edma->dma_dev.channels, device_node) { if (chan->client_count) continue; + + if (fsl_edma_srcid_in_use(fsl_edma, dma_spec->args[1])) + return NULL; + if ((chan->chan_id / chans_per_mux) == dma_spec->args[0]) { chan = dma_get_slave_channel(chan); if (chan) { @@ -153,7 +173,7 @@ static struct dma_chan *fsl_edma3_xlate(struct of_phandle_args *dma_spec, b_chmux = !!(fsl_edma->drvdata->flags & FSL_EDMA_DRV_HAS_CHMUX); - mutex_lock(&fsl_edma->fsl_edma_mutex); + guard(mutex)(&fsl_edma->fsl_edma_mutex); list_for_each_entry_safe(chan, _chan, &fsl_edma->dma_dev.channels, device_node) { @@ -161,6 +181,8 @@ static struct dma_chan *fsl_edma3_xlate(struct of_phandle_args *dma_spec, continue; fsl_chan = to_fsl_edma_chan(chan); + if (fsl_edma_srcid_in_use(fsl_edma, dma_spec->args[0])) + return NULL; i = fsl_chan - fsl_edma->chans; fsl_chan->priority = dma_spec->args[1]; @@ -177,18 +199,15 @@ static struct dma_chan *fsl_edma3_xlate(struct of_phandle_args *dma_spec, if (!b_chmux && i == dma_spec->args[0]) { chan = dma_get_slave_channel(chan); chan->device->privatecnt++; - mutex_unlock(&fsl_edma->fsl_edma_mutex); return chan; } else if (b_chmux && !fsl_chan->srcid) { /* if controller support channel mux, choose a free channel */ chan = dma_get_slave_channel(chan); chan->device->privatecnt++; fsl_chan->srcid = dma_spec->args[0]; - mutex_unlock(&fsl_edma->fsl_edma_mutex); return chan; } } - mutex_unlock(&fsl_edma->fsl_edma_mutex); return NULL; } diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c index 4c47bff81064..25a4134be36b 100644 --- a/drivers/dma/hisi_dma.c +++ b/drivers/dma/hisi_dma.c @@ -677,7 +677,7 @@ static void hisi_dma_init_hw_qp(struct hisi_dma_dev *hdma_dev, u32 index) writel_relaxed(tmp, addr); /* - * 0 - dma should process FLR whith CPU. + * 0 - dma should process FLR with CPU. * 1 - dma not process FLR, only cpu process FLR. */ addr = q_base + HISI_DMA_HIP09_DMA_FLR_DISABLE + diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c index 1398814d8fbb..3c648308a54a 100644 --- a/drivers/dma/idma64.c +++ b/drivers/dma/idma64.c @@ -290,7 +290,7 @@ static void idma64_desc_fill(struct idma64_chan *idma64c, desc->length += hw->len; } while (i); - /* Trigger an interrupt after the last block is transfered */ + /* Trigger an interrupt after the last block is transferred */ lli->ctllo |= IDMA64C_CTLL_INT_EN; /* Disable LLP transfer in the last block */ @@ -364,7 +364,7 @@ static size_t idma64_active_desc_size(struct idma64_chan *idma64c) if (!i) return bytes; - /* The current chunk is not fully transfered yet */ + /* The current chunk is not fully transferred yet */ bytes += desc->hw[--i].len; return bytes - IDMA64C_CTLH_BLOCK_TS(ctlhi); diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 5725ea82c409..234c1c658ec7 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -69,9 +69,15 @@ static struct idxd_driver_data idxd_driver_data[] = { static struct pci_device_id idxd_pci_tbl[] = { /* DSA ver 1.0 platforms */ { PCI_DEVICE_DATA(INTEL, DSA_SPR0, &idxd_driver_data[IDXD_TYPE_DSA]) }, + /* DSA on GNR-D platforms */ + { PCI_DEVICE_DATA(INTEL, DSA_GNRD, &idxd_driver_data[IDXD_TYPE_DSA]) }, + /* DSA on DMR platforms */ + { PCI_DEVICE_DATA(INTEL, DSA_DMR, &idxd_driver_data[IDXD_TYPE_DSA]) }, /* IAX ver 1.0 platforms */ { PCI_DEVICE_DATA(INTEL, IAX_SPR0, &idxd_driver_data[IDXD_TYPE_IAX]) }, + /* IAA on DMR platforms */ + { PCI_DEVICE_DATA(INTEL, IAA_DMR, &idxd_driver_data[IDXD_TYPE_IAX]) }, { 0, } }; MODULE_DEVICE_TABLE(pci, idxd_pci_tbl); diff --git a/drivers/dma/idxd/perfmon.c b/drivers/dma/idxd/perfmon.c index f511cf15845b..4b6af2f15d8a 100644 --- a/drivers/dma/idxd/perfmon.c +++ b/drivers/dma/idxd/perfmon.c @@ -449,8 +449,8 @@ static void idxd_pmu_init(struct idxd_pmu *idxd_pmu) idxd_pmu->pmu.attr_groups = perfmon_attr_groups; idxd_pmu->pmu.task_ctx_nr = perf_invalid_context; idxd_pmu->pmu.event_init = perfmon_pmu_event_init; - idxd_pmu->pmu.pmu_enable = perfmon_pmu_enable, - idxd_pmu->pmu.pmu_disable = perfmon_pmu_disable, + idxd_pmu->pmu.pmu_enable = perfmon_pmu_enable; + idxd_pmu->pmu.pmu_disable = perfmon_pmu_disable; idxd_pmu->pmu.add = perfmon_pmu_event_add; idxd_pmu->pmu.del = perfmon_pmu_event_del; idxd_pmu->pmu.start = perfmon_pmu_event_start; diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c index 817a564413b0..94eca25ae9b9 100644 --- a/drivers/dma/idxd/submit.c +++ b/drivers/dma/idxd/submit.c @@ -134,7 +134,7 @@ static void llist_abort_desc(struct idxd_wq *wq, struct idxd_irq_entry *ie, * completing the descriptor will return desc to allocator and * the desc can be acquired by a different process and the * desc->list can be modified. Delete desc from list so the - * list trasversing does not get corrupted by the other process. + * list traversing does not get corrupted by the other process. */ list_for_each_entry_safe(d, t, &flist, list) { list_del_init(&d->list); diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index ebf7c115d553..e913f0db99da 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -167,7 +167,6 @@ struct imxdma_channel { enum imx_dma_type { IMX1_DMA, - IMX21_DMA, IMX27_DMA, }; @@ -195,8 +194,6 @@ static const struct of_device_id imx_dma_of_dev_id[] = { { .compatible = "fsl,imx1-dma", .data = (const void *)IMX1_DMA, }, { - .compatible = "fsl,imx21-dma", .data = (const void *)IMX21_DMA, - }, { .compatible = "fsl,imx27-dma", .data = (const void *)IMX27_DMA, }, { /* sentinel */ diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 7b502b60b38b..cc9ddd6c325b 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -905,7 +905,7 @@ static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma) op = IOAT_OP_XOR_VAL; - /* validate the sources with the destintation page */ + /* validate the sources with the destination page */ for (i = 0; i < IOAT_NUM_SRC_TEST; i++) xor_val_srcs[i] = xor_srcs[i]; xor_val_srcs[i] = dest; diff --git a/drivers/dma/lgm/lgm-dma.c b/drivers/dma/lgm/lgm-dma.c index 4117c7b67e9c..8173c3f1075a 100644 --- a/drivers/dma/lgm/lgm-dma.c +++ b/drivers/dma/lgm/lgm-dma.c @@ -107,7 +107,7 @@ * If header mode is set in DMA descriptor, * If bit 30 is disabled, HDR_LEN must be configured according to channel * requirement. - * If bit 30 is enabled(checksum with heade mode), HDR_LEN has no need to + * If bit 30 is enabled(checksum with header mode), HDR_LEN has no need to * be configured. It will enable check sum for switch * If header mode is not set in DMA descriptor, * This register setting doesn't matter diff --git a/drivers/dma/loongson1-apb-dma.c b/drivers/dma/loongson1-apb-dma.c new file mode 100644 index 000000000000..255fe7eca212 --- /dev/null +++ b/drivers/dma/loongson1-apb-dma.c @@ -0,0 +1,660 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for Loongson-1 APB DMA Controller + * + * Copyright (C) 2015-2024 Keguang Zhang <keguang.zhang@gmail.com> + */ + +#include <linux/dmapool.h> +#include <linux/dma-mapping.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_dma.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include "dmaengine.h" +#include "virt-dma.h" + +/* Loongson-1 DMA Control Register */ +#define LS1X_DMA_CTRL 0x0 + +/* DMA Control Register Bits */ +#define LS1X_DMA_STOP BIT(4) +#define LS1X_DMA_START BIT(3) +#define LS1X_DMA_ASK_VALID BIT(2) + +/* DMA Next Field Bits */ +#define LS1X_DMA_NEXT_VALID BIT(0) + +/* DMA Command Field Bits */ +#define LS1X_DMA_RAM2DEV BIT(12) +#define LS1X_DMA_INT BIT(1) +#define LS1X_DMA_INT_MASK BIT(0) + +#define LS1X_DMA_LLI_ALIGNMENT 64 +#define LS1X_DMA_LLI_ADDR_MASK GENMASK(31, __ffs(LS1X_DMA_LLI_ALIGNMENT)) +#define LS1X_DMA_MAX_CHANNELS 3 + +enum ls1x_dmadesc_offsets { + LS1X_DMADESC_NEXT = 0, + LS1X_DMADESC_SADDR, + LS1X_DMADESC_DADDR, + LS1X_DMADESC_LENGTH, + LS1X_DMADESC_STRIDE, + LS1X_DMADESC_CYCLES, + LS1X_DMADESC_CMD, + LS1X_DMADESC_SIZE +}; + +struct ls1x_dma_lli { + unsigned int hw[LS1X_DMADESC_SIZE]; + dma_addr_t phys; + struct list_head node; +} __aligned(LS1X_DMA_LLI_ALIGNMENT); + +struct ls1x_dma_desc { + struct virt_dma_desc vd; + struct list_head lli_list; +}; + +struct ls1x_dma_chan { + struct virt_dma_chan vc; + struct dma_pool *lli_pool; + phys_addr_t src_addr; + phys_addr_t dst_addr; + enum dma_slave_buswidth src_addr_width; + enum dma_slave_buswidth dst_addr_width; + unsigned int bus_width; + void __iomem *reg_base; + int irq; + bool is_cyclic; + struct ls1x_dma_lli *curr_lli; +}; + +struct ls1x_dma { + struct dma_device ddev; + unsigned int nr_chans; + struct ls1x_dma_chan chan[]; +}; + +static irqreturn_t ls1x_dma_irq_handler(int irq, void *data); + +#define to_ls1x_dma_chan(dchan) \ + container_of(dchan, struct ls1x_dma_chan, vc.chan) + +#define to_ls1x_dma_desc(d) \ + container_of(d, struct ls1x_dma_desc, vd) + +static inline struct device *chan2dev(struct dma_chan *chan) +{ + return &chan->dev->device; +} + +static inline int ls1x_dma_query(struct ls1x_dma_chan *chan, + dma_addr_t *lli_phys) +{ + struct dma_chan *dchan = &chan->vc.chan; + int val, ret; + + val = *lli_phys & LS1X_DMA_LLI_ADDR_MASK; + val |= LS1X_DMA_ASK_VALID; + val |= dchan->chan_id; + writel(val, chan->reg_base + LS1X_DMA_CTRL); + ret = readl_poll_timeout_atomic(chan->reg_base + LS1X_DMA_CTRL, val, + !(val & LS1X_DMA_ASK_VALID), 0, 3000); + if (ret) + dev_err(chan2dev(dchan), "failed to query DMA\n"); + + return ret; +} + +static inline int ls1x_dma_start(struct ls1x_dma_chan *chan, + dma_addr_t *lli_phys) +{ + struct dma_chan *dchan = &chan->vc.chan; + struct device *dev = chan2dev(dchan); + int val, ret; + + val = *lli_phys & LS1X_DMA_LLI_ADDR_MASK; + val |= LS1X_DMA_START; + val |= dchan->chan_id; + writel(val, chan->reg_base + LS1X_DMA_CTRL); + ret = readl_poll_timeout(chan->reg_base + LS1X_DMA_CTRL, val, + !(val & LS1X_DMA_START), 0, 1000); + if (!ret) + dev_dbg(dev, "start DMA with lli_phys=%pad\n", lli_phys); + else + dev_err(dev, "failed to start DMA\n"); + + return ret; +} + +static inline void ls1x_dma_stop(struct ls1x_dma_chan *chan) +{ + int val = readl(chan->reg_base + LS1X_DMA_CTRL); + + writel(val | LS1X_DMA_STOP, chan->reg_base + LS1X_DMA_CTRL); +} + +static void ls1x_dma_free_chan_resources(struct dma_chan *dchan) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + struct device *dev = chan2dev(dchan); + + dma_free_coherent(dev, sizeof(struct ls1x_dma_lli), + chan->curr_lli, chan->curr_lli->phys); + dma_pool_destroy(chan->lli_pool); + chan->lli_pool = NULL; + devm_free_irq(dev, chan->irq, chan); + vchan_free_chan_resources(&chan->vc); +} + +static int ls1x_dma_alloc_chan_resources(struct dma_chan *dchan) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + struct device *dev = chan2dev(dchan); + dma_addr_t phys; + int ret; + + ret = devm_request_irq(dev, chan->irq, ls1x_dma_irq_handler, + IRQF_SHARED, dma_chan_name(dchan), chan); + if (ret) { + dev_err(dev, "failed to request IRQ %d\n", chan->irq); + return ret; + } + + chan->lli_pool = dma_pool_create(dma_chan_name(dchan), dev, + sizeof(struct ls1x_dma_lli), + __alignof__(struct ls1x_dma_lli), 0); + if (!chan->lli_pool) + return -ENOMEM; + + /* allocate memory for querying the current lli */ + dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); + chan->curr_lli = dma_alloc_coherent(dev, sizeof(struct ls1x_dma_lli), + &phys, GFP_KERNEL); + if (!chan->curr_lli) { + dma_pool_destroy(chan->lli_pool); + return -ENOMEM; + } + chan->curr_lli->phys = phys; + + return 0; +} + +static void ls1x_dma_free_desc(struct virt_dma_desc *vd) +{ + struct ls1x_dma_desc *desc = to_ls1x_dma_desc(vd); + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(vd->tx.chan); + struct ls1x_dma_lli *lli, *_lli; + + list_for_each_entry_safe(lli, _lli, &desc->lli_list, node) { + list_del(&lli->node); + dma_pool_free(chan->lli_pool, lli, lli->phys); + } + + kfree(desc); +} + +static struct ls1x_dma_desc *ls1x_dma_alloc_desc(void) +{ + struct ls1x_dma_desc *desc; + + desc = kzalloc(sizeof(*desc), GFP_NOWAIT); + if (!desc) + return NULL; + + INIT_LIST_HEAD(&desc->lli_list); + + return desc; +} + +static int ls1x_dma_prep_lli(struct dma_chan *dchan, struct ls1x_dma_desc *desc, + struct scatterlist *sgl, unsigned int sg_len, + enum dma_transfer_direction dir, bool is_cyclic) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + struct ls1x_dma_lli *lli, *prev = NULL, *first = NULL; + struct device *dev = chan2dev(dchan); + struct list_head *pos = NULL; + struct scatterlist *sg; + unsigned int dev_addr, cmd, i; + + switch (dir) { + case DMA_MEM_TO_DEV: + dev_addr = chan->dst_addr; + chan->bus_width = chan->dst_addr_width; + cmd = LS1X_DMA_RAM2DEV | LS1X_DMA_INT; + break; + case DMA_DEV_TO_MEM: + dev_addr = chan->src_addr; + chan->bus_width = chan->src_addr_width; + cmd = LS1X_DMA_INT; + break; + default: + dev_err(dev, "unsupported DMA direction: %s\n", + dmaengine_get_direction_text(dir)); + return -EINVAL; + } + + for_each_sg(sgl, sg, sg_len, i) { + dma_addr_t buf_addr = sg_dma_address(sg); + size_t buf_len = sg_dma_len(sg); + dma_addr_t phys; + + if (!is_dma_copy_aligned(dchan->device, buf_addr, 0, buf_len)) { + dev_err(dev, "buffer is not aligned\n"); + return -EINVAL; + } + + /* allocate HW descriptors */ + lli = dma_pool_zalloc(chan->lli_pool, GFP_NOWAIT, &phys); + if (!lli) { + dev_err(dev, "failed to alloc lli %u\n", i); + return -ENOMEM; + } + + /* setup HW descriptors */ + lli->phys = phys; + lli->hw[LS1X_DMADESC_SADDR] = buf_addr; + lli->hw[LS1X_DMADESC_DADDR] = dev_addr; + lli->hw[LS1X_DMADESC_LENGTH] = buf_len / chan->bus_width; + lli->hw[LS1X_DMADESC_STRIDE] = 0; + lli->hw[LS1X_DMADESC_CYCLES] = 1; + lli->hw[LS1X_DMADESC_CMD] = cmd; + + if (prev) + prev->hw[LS1X_DMADESC_NEXT] = + lli->phys | LS1X_DMA_NEXT_VALID; + prev = lli; + + if (!first) + first = lli; + + list_add_tail(&lli->node, &desc->lli_list); + } + + if (is_cyclic) { + lli->hw[LS1X_DMADESC_NEXT] = first->phys | LS1X_DMA_NEXT_VALID; + chan->is_cyclic = is_cyclic; + } + + list_for_each(pos, &desc->lli_list) { + lli = list_entry(pos, struct ls1x_dma_lli, node); + print_hex_dump_debug("LLI: ", DUMP_PREFIX_OFFSET, 16, 4, + lli, sizeof(*lli), false); + } + + return 0; +} + +static struct dma_async_tx_descriptor * +ls1x_dma_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl, + unsigned int sg_len, enum dma_transfer_direction dir, + unsigned long flags, void *context) +{ + struct ls1x_dma_desc *desc; + + dev_dbg(chan2dev(dchan), "sg_len=%u flags=0x%lx dir=%s\n", + sg_len, flags, dmaengine_get_direction_text(dir)); + + desc = ls1x_dma_alloc_desc(); + if (!desc) + return NULL; + + if (ls1x_dma_prep_lli(dchan, desc, sgl, sg_len, dir, false)) { + ls1x_dma_free_desc(&desc->vd); + return NULL; + } + + return vchan_tx_prep(to_virt_chan(dchan), &desc->vd, flags); +} + +static struct dma_async_tx_descriptor * +ls1x_dma_prep_dma_cyclic(struct dma_chan *dchan, dma_addr_t buf_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction dir, unsigned long flags) +{ + struct ls1x_dma_desc *desc; + struct scatterlist *sgl; + unsigned int sg_len; + unsigned int i; + int ret; + + dev_dbg(chan2dev(dchan), + "buf_len=%zu period_len=%zu flags=0x%lx dir=%s\n", + buf_len, period_len, flags, dmaengine_get_direction_text(dir)); + + desc = ls1x_dma_alloc_desc(); + if (!desc) + return NULL; + + /* allocate the scatterlist */ + sg_len = buf_len / period_len; + sgl = kmalloc_array(sg_len, sizeof(*sgl), GFP_NOWAIT); + if (!sgl) + return NULL; + + sg_init_table(sgl, sg_len); + for (i = 0; i < sg_len; ++i) { + sg_set_page(&sgl[i], pfn_to_page(PFN_DOWN(buf_addr)), + period_len, offset_in_page(buf_addr)); + sg_dma_address(&sgl[i]) = buf_addr; + sg_dma_len(&sgl[i]) = period_len; + buf_addr += period_len; + } + + ret = ls1x_dma_prep_lli(dchan, desc, sgl, sg_len, dir, true); + kfree(sgl); + if (ret) { + ls1x_dma_free_desc(&desc->vd); + return NULL; + } + + return vchan_tx_prep(to_virt_chan(dchan), &desc->vd, flags); +} + +static int ls1x_dma_slave_config(struct dma_chan *dchan, + struct dma_slave_config *config) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + + chan->src_addr = config->src_addr; + chan->src_addr_width = config->src_addr_width; + chan->dst_addr = config->dst_addr; + chan->dst_addr_width = config->dst_addr_width; + + return 0; +} + +static int ls1x_dma_pause(struct dma_chan *dchan) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + int ret; + + guard(spinlock_irqsave)(&chan->vc.lock); + /* save the current lli */ + ret = ls1x_dma_query(chan, &chan->curr_lli->phys); + if (!ret) + ls1x_dma_stop(chan); + + return ret; +} + +static int ls1x_dma_resume(struct dma_chan *dchan) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + + guard(spinlock_irqsave)(&chan->vc.lock); + + return ls1x_dma_start(chan, &chan->curr_lli->phys); +} + +static int ls1x_dma_terminate_all(struct dma_chan *dchan) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + struct virt_dma_desc *vd; + LIST_HEAD(head); + + ls1x_dma_stop(chan); + + scoped_guard(spinlock_irqsave, &chan->vc.lock) { + vd = vchan_next_desc(&chan->vc); + if (vd) + vchan_terminate_vdesc(vd); + + vchan_get_all_descriptors(&chan->vc, &head); + } + + vchan_dma_desc_free_list(&chan->vc, &head); + + return 0; +} + +static void ls1x_dma_synchronize(struct dma_chan *dchan) +{ + vchan_synchronize(to_virt_chan(dchan)); +} + +static enum dma_status ls1x_dma_tx_status(struct dma_chan *dchan, + dma_cookie_t cookie, + struct dma_tx_state *state) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + struct virt_dma_desc *vd; + enum dma_status status; + size_t bytes = 0; + + status = dma_cookie_status(dchan, cookie, state); + if (status == DMA_COMPLETE) + return status; + + scoped_guard(spinlock_irqsave, &chan->vc.lock) { + vd = vchan_find_desc(&chan->vc, cookie); + if (vd) { + struct ls1x_dma_desc *desc = to_ls1x_dma_desc(vd); + struct ls1x_dma_lli *lli; + dma_addr_t next_phys; + + /* get the current lli */ + if (ls1x_dma_query(chan, &chan->curr_lli->phys)) + return status; + + /* locate the current lli */ + next_phys = chan->curr_lli->hw[LS1X_DMADESC_NEXT]; + list_for_each_entry(lli, &desc->lli_list, node) + if (lli->hw[LS1X_DMADESC_NEXT] == next_phys) + break; + + dev_dbg(chan2dev(dchan), "current lli_phys=%pad", + &lli->phys); + + /* count the residues */ + list_for_each_entry_from(lli, &desc->lli_list, node) + bytes += lli->hw[LS1X_DMADESC_LENGTH] * + chan->bus_width; + } + } + + dma_set_residue(state, bytes); + + return status; +} + +static void ls1x_dma_issue_pending(struct dma_chan *dchan) +{ + struct ls1x_dma_chan *chan = to_ls1x_dma_chan(dchan); + + guard(spinlock_irqsave)(&chan->vc.lock); + + if (vchan_issue_pending(&chan->vc)) { + struct virt_dma_desc *vd = vchan_next_desc(&chan->vc); + + if (vd) { + struct ls1x_dma_desc *desc = to_ls1x_dma_desc(vd); + struct ls1x_dma_lli *lli; + + lli = list_first_entry(&desc->lli_list, + struct ls1x_dma_lli, node); + ls1x_dma_start(chan, &lli->phys); + } + } +} + +static irqreturn_t ls1x_dma_irq_handler(int irq, void *data) +{ + struct ls1x_dma_chan *chan = data; + struct dma_chan *dchan = &chan->vc.chan; + struct device *dev = chan2dev(dchan); + struct virt_dma_desc *vd; + + scoped_guard(spinlock, &chan->vc.lock) { + vd = vchan_next_desc(&chan->vc); + if (!vd) { + dev_warn(dev, + "IRQ %d with no active desc on channel %d\n", + irq, dchan->chan_id); + return IRQ_NONE; + } + + if (chan->is_cyclic) { + vchan_cyclic_callback(vd); + } else { + list_del(&vd->node); + vchan_cookie_complete(vd); + } + } + + dev_dbg(dev, "DMA IRQ %d on channel %d\n", irq, dchan->chan_id); + + return IRQ_HANDLED; +} + +static int ls1x_dma_chan_probe(struct platform_device *pdev, + struct ls1x_dma *dma) +{ + void __iomem *reg_base; + int id; + + reg_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(reg_base)) + return PTR_ERR(reg_base); + + for (id = 0; id < dma->nr_chans; id++) { + struct ls1x_dma_chan *chan = &dma->chan[id]; + char pdev_irqname[16]; + + snprintf(pdev_irqname, sizeof(pdev_irqname), "ch%d", id); + chan->irq = platform_get_irq_byname(pdev, pdev_irqname); + if (chan->irq < 0) + return dev_err_probe(&pdev->dev, chan->irq, + "failed to get IRQ for ch%d\n", + id); + + chan->reg_base = reg_base; + chan->vc.desc_free = ls1x_dma_free_desc; + vchan_init(&chan->vc, &dma->ddev); + } + + return 0; +} + +static void ls1x_dma_chan_remove(struct ls1x_dma *dma) +{ + int id; + + for (id = 0; id < dma->nr_chans; id++) { + struct ls1x_dma_chan *chan = &dma->chan[id]; + + if (chan->vc.chan.device == &dma->ddev) { + list_del(&chan->vc.chan.device_node); + tasklet_kill(&chan->vc.task); + } + } +} + +static int ls1x_dma_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct dma_device *ddev; + struct ls1x_dma *dma; + int ret; + + ret = platform_irq_count(pdev); + if (ret <= 0 || ret > LS1X_DMA_MAX_CHANNELS) + return dev_err_probe(dev, -EINVAL, + "Invalid number of IRQ channels: %d\n", + ret); + + dma = devm_kzalloc(dev, struct_size(dma, chan, ret), GFP_KERNEL); + if (!dma) + return -ENOMEM; + dma->nr_chans = ret; + + /* initialize DMA device */ + ddev = &dma->ddev; + ddev->dev = dev; + ddev->copy_align = DMAENGINE_ALIGN_4_BYTES; + ddev->src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); + ddev->dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); + ddev->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); + ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT; + ddev->device_alloc_chan_resources = ls1x_dma_alloc_chan_resources; + ddev->device_free_chan_resources = ls1x_dma_free_chan_resources; + ddev->device_prep_slave_sg = ls1x_dma_prep_slave_sg; + ddev->device_prep_dma_cyclic = ls1x_dma_prep_dma_cyclic; + ddev->device_config = ls1x_dma_slave_config; + ddev->device_pause = ls1x_dma_pause; + ddev->device_resume = ls1x_dma_resume; + ddev->device_terminate_all = ls1x_dma_terminate_all; + ddev->device_synchronize = ls1x_dma_synchronize; + ddev->device_tx_status = ls1x_dma_tx_status; + ddev->device_issue_pending = ls1x_dma_issue_pending; + dma_cap_set(DMA_SLAVE, ddev->cap_mask); + INIT_LIST_HEAD(&ddev->channels); + + /* initialize DMA channels */ + ret = ls1x_dma_chan_probe(pdev, dma); + if (ret) + goto err; + + ret = dmaenginem_async_device_register(ddev); + if (ret) { + dev_err(dev, "failed to register DMA device\n"); + goto err; + } + + ret = of_dma_controller_register(dev->of_node, of_dma_xlate_by_chan_id, + ddev); + if (ret) { + dev_err(dev, "failed to register DMA controller\n"); + goto err; + } + + platform_set_drvdata(pdev, dma); + dev_info(dev, "Loongson1 DMA driver registered\n"); + + return 0; + +err: + ls1x_dma_chan_remove(dma); + + return ret; +} + +static void ls1x_dma_remove(struct platform_device *pdev) +{ + struct ls1x_dma *dma = platform_get_drvdata(pdev); + + of_dma_controller_free(pdev->dev.of_node); + ls1x_dma_chan_remove(dma); +} + +static const struct of_device_id ls1x_dma_match[] = { + { .compatible = "loongson,ls1b-apbdma" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ls1x_dma_match); + +static struct platform_driver ls1x_dma_driver = { + .probe = ls1x_dma_probe, + .remove = ls1x_dma_remove, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = ls1x_dma_match, + }, +}; + +module_platform_driver(ls1x_dma_driver); + +MODULE_AUTHOR("Keguang Zhang <keguang.zhang@gmail.com>"); +MODULE_DESCRIPTION("Loongson-1 APB DMA Controller driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/dma/lpc32xx-dmamux.c b/drivers/dma/lpc32xx-dmamux.c new file mode 100644 index 000000000000..351d7e23e615 --- /dev/null +++ b/drivers/dma/lpc32xx-dmamux.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright 2024 Timesys Corporation <piotr.wojtaszczyk@timesys.com> +// +// Based on TI DMA Crossbar driver by: +// Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com +// Author: Peter Ujfalusi <peter.ujfalusi@ti.com> + +#include <linux/err.h> +#include <linux/init.h> +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/of_dma.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/spinlock.h> + +#define LPC32XX_SSP_CLK_CTRL 0x78 +#define LPC32XX_I2S_CLK_CTRL 0x7c + +struct lpc32xx_dmamux { + int signal; + char *name_sel0; + char *name_sel1; + int muxval; + int muxreg; + int bit; + bool busy; +}; + +struct lpc32xx_dmamux_data { + struct dma_router dmarouter; + struct regmap *reg; + spinlock_t lock; /* protects busy status flag */ +}; + +/* From LPC32x0 User manual "3.2.1 DMA request signals" */ +static struct lpc32xx_dmamux lpc32xx_muxes[] = { + { + .signal = 3, + .name_sel0 = "spi2-rx-tx", + .name_sel1 = "ssp1-rx", + .muxreg = LPC32XX_SSP_CLK_CTRL, + .bit = 5, + }, + { + .signal = 10, + .name_sel0 = "uart7-rx", + .name_sel1 = "i2s1-dma1", + .muxreg = LPC32XX_I2S_CLK_CTRL, + .bit = 4, + }, + { + .signal = 11, + .name_sel0 = "spi1-rx-tx", + .name_sel1 = "ssp1-tx", + .muxreg = LPC32XX_SSP_CLK_CTRL, + .bit = 4, + }, + { + .signal = 14, + .name_sel0 = "none", + .name_sel1 = "ssp0-rx", + .muxreg = LPC32XX_SSP_CLK_CTRL, + .bit = 3, + }, + { + .signal = 15, + .name_sel0 = "none", + .name_sel1 = "ssp0-tx", + .muxreg = LPC32XX_SSP_CLK_CTRL, + .bit = 2, + }, +}; + +static void lpc32xx_dmamux_release(struct device *dev, void *route_data) +{ + struct lpc32xx_dmamux_data *dmamux = dev_get_drvdata(dev); + struct lpc32xx_dmamux *mux = route_data; + + dev_dbg(dev, "releasing dma request signal %d routed to %s\n", + mux->signal, mux->muxval ? mux->name_sel1 : mux->name_sel1); + + guard(spinlock)(&dmamux->lock); + + mux->busy = false; +} + +static void *lpc32xx_dmamux_reserve(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); + struct device *dev = &pdev->dev; + struct lpc32xx_dmamux_data *dmamux = platform_get_drvdata(pdev); + unsigned long flags; + struct lpc32xx_dmamux *mux = NULL; + int i; + + if (dma_spec->args_count != 3) { + dev_err(&pdev->dev, "invalid number of dma mux args\n"); + return ERR_PTR(-EINVAL); + } + + for (i = 0; i < ARRAY_SIZE(lpc32xx_muxes); i++) { + if (lpc32xx_muxes[i].signal == dma_spec->args[0]) { + mux = &lpc32xx_muxes[i]; + break; + } + } + if (!mux) { + dev_err(&pdev->dev, "invalid mux request number: %d\n", + dma_spec->args[0]); + return ERR_PTR(-EINVAL); + } + + if (dma_spec->args[2] > 1) { + dev_err(&pdev->dev, "invalid dma mux value: %d\n", + dma_spec->args[1]); + return ERR_PTR(-EINVAL); + } + + /* The of_node_put() will be done in the core for the node */ + dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); + if (!dma_spec->np) { + dev_err(&pdev->dev, "can't get dma master\n"); + return ERR_PTR(-EINVAL); + } + + spin_lock_irqsave(&dmamux->lock, flags); + if (mux->busy) { + spin_unlock_irqrestore(&dmamux->lock, flags); + dev_err(dev, "dma request signal %d busy, routed to %s\n", + mux->signal, mux->muxval ? mux->name_sel1 : mux->name_sel1); + of_node_put(dma_spec->np); + return ERR_PTR(-EBUSY); + } + + mux->busy = true; + mux->muxval = dma_spec->args[2] ? BIT(mux->bit) : 0; + + regmap_update_bits(dmamux->reg, mux->muxreg, BIT(mux->bit), mux->muxval); + spin_unlock_irqrestore(&dmamux->lock, flags); + + dma_spec->args[2] = 0; + dma_spec->args_count = 2; + + dev_dbg(dev, "dma request signal %d routed to %s\n", + mux->signal, mux->muxval ? mux->name_sel1 : mux->name_sel1); + + return mux; +} + +static int lpc32xx_dmamux_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct lpc32xx_dmamux_data *dmamux; + + dmamux = devm_kzalloc(&pdev->dev, sizeof(*dmamux), GFP_KERNEL); + if (!dmamux) + return -ENOMEM; + + dmamux->reg = syscon_node_to_regmap(np->parent); + if (IS_ERR(dmamux->reg)) { + dev_err(&pdev->dev, "syscon lookup failed\n"); + return PTR_ERR(dmamux->reg); + } + + spin_lock_init(&dmamux->lock); + platform_set_drvdata(pdev, dmamux); + dmamux->dmarouter.dev = &pdev->dev; + dmamux->dmarouter.route_free = lpc32xx_dmamux_release; + + return of_dma_router_register(np, lpc32xx_dmamux_reserve, + &dmamux->dmarouter); +} + +static const struct of_device_id lpc32xx_dmamux_match[] = { + { .compatible = "nxp,lpc3220-dmamux" }, + {}, +}; + +static struct platform_driver lpc32xx_dmamux_driver = { + .probe = lpc32xx_dmamux_probe, + .driver = { + .name = "lpc32xx-dmamux", + .of_match_table = lpc32xx_dmamux_match, + }, +}; + +static int __init lpc32xx_dmamux_init(void) +{ + return platform_driver_register(&lpc32xx_dmamux_driver); +} +arch_initcall(lpc32xx_dmamux_init); diff --git a/drivers/dma/ls2x-apb-dma.c b/drivers/dma/ls2x-apb-dma.c index a49913f3ed3f..9652e8666722 100644 --- a/drivers/dma/ls2x-apb-dma.c +++ b/drivers/dma/ls2x-apb-dma.c @@ -33,11 +33,11 @@ #define LDMA_STOP BIT(4) /* DMA stop operation */ #define LDMA_CONFIG_MASK GENMASK(4, 0) /* DMA controller config bits mask */ -/* Bitfields in ndesc_addr field of HW decriptor */ +/* Bitfields in ndesc_addr field of HW descriptor */ #define LDMA_DESC_EN BIT(0) /*1: The next descriptor is valid */ #define LDMA_DESC_ADDR_LOW GENMASK(31, 1) -/* Bitfields in cmd field of HW decriptor */ +/* Bitfields in cmd field of HW descriptor */ #define LDMA_INT BIT(1) /* Enable DMA interrupts */ #define LDMA_DATA_DIRECTION BIT(12) /* 1: write to device, 0: read from device */ diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c index 529100c5b9f5..b69eabf12a24 100644 --- a/drivers/dma/mediatek/mtk-cqdma.c +++ b/drivers/dma/mediatek/mtk-cqdma.c @@ -518,7 +518,7 @@ mtk_cqdma_prep_dma_memcpy(struct dma_chan *c, dma_addr_t dest, /* setup dma channel */ cvd[i]->ch = c; - /* setup sourece, destination, and length */ + /* setup source, destination, and length */ tlen = (len > MTK_CQDMA_MAX_LEN) ? MTK_CQDMA_MAX_LEN : len; cvd[i]->len = tlen; cvd[i]->src = src; @@ -617,7 +617,7 @@ static int mtk_cqdma_alloc_chan_resources(struct dma_chan *c) u32 i, min_refcnt = U32_MAX, refcnt; unsigned long flags; - /* allocate PC with the minimun refcount */ + /* allocate PC with the minimum refcount */ for (i = 0; i < cqdma->dma_channels; ++i) { refcnt = refcount_read(&cqdma->pc[i]->refcnt); if (refcnt < min_refcnt) { diff --git a/drivers/dma/mediatek/mtk-hsdma.c b/drivers/dma/mediatek/mtk-hsdma.c index 36ff11e909ea..58c7961ab9ad 100644 --- a/drivers/dma/mediatek/mtk-hsdma.c +++ b/drivers/dma/mediatek/mtk-hsdma.c @@ -226,7 +226,7 @@ struct mtk_hsdma_soc { * @pc_refcnt: Track how many VCs are using the PC * @lock: Lock protect agaisting multiple VCs access PC * @soc: The pointer to area holding differences among - * vaious platform + * various platform */ struct mtk_hsdma_device { struct dma_device ddev; diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index bcd3b623ac6c..43efce77bb57 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -414,7 +414,7 @@ mv_xor_tx_submit(struct dma_async_tx_descriptor *tx) if (!mv_chan_is_busy(mv_chan)) { u32 current_desc = mv_chan_get_current_desc(mv_chan); /* - * and the curren desc is the end of the chain before + * and the current desc is the end of the chain before * the append, then we need to start the channel */ if (current_desc == old_chain_tail->async_tx.phys) @@ -1074,7 +1074,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev, if (!mv_chan->dma_desc_pool_virt) return ERR_PTR(-ENOMEM); - /* discover transaction capabilites from the platform data */ + /* discover transaction capabilities from the platform data */ dma_dev->cap_mask = cap_mask; INIT_LIST_HEAD(&dma_dev->channels); diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h index d86086b05b0e..c87cefd38a07 100644 --- a/drivers/dma/mv_xor.h +++ b/drivers/dma/mv_xor.h @@ -99,7 +99,7 @@ struct mv_xor_device { * @common: common dmaengine channel object members * @slots_allocated: records the actual size of the descriptor slot pool * @irq_tasklet: bottom half where mv_xor_slot_cleanup runs - * @op_in_desc: new mode of driver, each op is writen to descriptor. + * @op_in_desc: new mode of driver, each op is written to descriptor. */ struct mv_xor_chan { int pending; diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c index 97ebc791a30b..c8c67f4d982c 100644 --- a/drivers/dma/mv_xor_v2.c +++ b/drivers/dma/mv_xor_v2.c @@ -175,7 +175,7 @@ struct mv_xor_v2_device { * struct mv_xor_v2_sw_desc - implements a xor SW descriptor * @idx: descriptor index * @async_tx: support for the async_tx api - * @hw_desc: assosiated HW descriptor + * @hw_desc: associated HW descriptor * @free_list: node of the free SW descriprots list */ struct mv_xor_v2_sw_desc { diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c index c08916339aa7..3b011a91d48e 100644 --- a/drivers/dma/nbpfaxi.c +++ b/drivers/dma/nbpfaxi.c @@ -897,7 +897,7 @@ static int nbpf_config(struct dma_chan *dchan, /* * We could check config->slave_id to match chan->terminal here, * but with DT they would be coming from the same source, so - * such a check would be superflous + * such a check would be superfluous */ chan->slave_dst_addr = config->dst_addr; diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index e588fff9f21d..423442e55d36 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -26,7 +26,7 @@ static DEFINE_MUTEX(of_dma_lock); * * Finds a DMA controller with matching device node and number for dma cells * in a list of registered DMA controllers. If a match is found a valid pointer - * to the DMA data stored is retuned. A NULL pointer is returned if no match is + * to the DMA data stored is returned. A NULL pointer is returned if no match is * found. */ static struct of_dma *of_dma_find_controller(const struct of_phandle_args *dma_spec) @@ -342,7 +342,7 @@ EXPORT_SYMBOL_GPL(of_dma_simple_xlate); * * This function can be used as the of xlate callback for DMA driver which wants * to match the channel based on the channel id. When using this xlate function - * the #dma-cells propety of the DMA controller dt node needs to be set to 1. + * the #dma-cells property of the DMA controller dt node needs to be set to 1. * The data parameter of of_dma_controller_register must be a pointer to the * dma_device struct the function should match upon. * diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c index e001f4f7aa64..aa436f9e3571 100644 --- a/drivers/dma/owl-dma.c +++ b/drivers/dma/owl-dma.c @@ -1156,7 +1156,7 @@ static int owl_dma_probe(struct platform_device *pdev) } /* - * Eventhough the DMA controller is capable of generating 4 + * Even though the DMA controller is capable of generating 4 * IRQ's for DMA priority feature, we only use 1 IRQ for * simplification. */ diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c index bbb60a970dab..7b78759ac734 100644 --- a/drivers/dma/ppc4xx/adma.c +++ b/drivers/dma/ppc4xx/adma.c @@ -9,7 +9,7 @@ */ /* - * This driver supports the asynchrounous DMA copy and RAID engines available + * This driver supports the asynchronous DMA copy and RAID engines available * on the AMCC PPC440SPe Processors. * Based on the Intel Xscale(R) family of I/O Processors (IOP 32x, 33x, 134x) * ADMA driver written by D.Williams. diff --git a/drivers/dma/ppc4xx/dma.h b/drivers/dma/ppc4xx/dma.h index 1ff4be23db0f..b5725481bfa6 100644 --- a/drivers/dma/ppc4xx/dma.h +++ b/drivers/dma/ppc4xx/dma.h @@ -14,7 +14,7 @@ /* Number of elements in the array with statical CDBs */ #define MAX_STAT_DMA_CDBS 16 -/* Number of DMA engines available on the contoller */ +/* Number of DMA engines available on the controller */ #define DMA_ENGINES_NUM 2 /* Maximum h/w supported number of destinations */ diff --git a/drivers/dma/ptdma/ptdma.h b/drivers/dma/ptdma/ptdma.h index 21b4bf895200..39bc37268235 100644 --- a/drivers/dma/ptdma/ptdma.h +++ b/drivers/dma/ptdma/ptdma.h @@ -192,7 +192,7 @@ struct pt_cmd_queue { /* Queue dma pool */ struct dma_pool *dma_pool; - /* Queue base address (not neccessarily aligned)*/ + /* Queue base address (not necessarily aligned)*/ struct ptdma_desc *qbase; /* Aligned queue start address (per requirement) */ diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index 368ffaa40037..d43a881e43b9 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -440,7 +440,7 @@ static void bam_reset(struct bam_device *bdev) val |= BAM_EN; writel_relaxed(val, bam_addr(bdev, 0, BAM_CTRL)); - /* set descriptor threshhold, start with 4 bytes */ + /* set descriptor threshold, start with 4 bytes */ writel_relaxed(DEFAULT_CNT_THRSHLD, bam_addr(bdev, 0, BAM_DESC_CNT_TRSHLD)); @@ -667,7 +667,7 @@ static struct dma_async_tx_descriptor *bam_prep_slave_sg(struct dma_chan *chan, for_each_sg(sgl, sg, sg_len, i) num_alloc += DIV_ROUND_UP(sg_dma_len(sg), BAM_FIFO_SIZE); - /* allocate enough room to accomodate the number of entries */ + /* allocate enough room to accommodate the number of entries */ async_desc = kzalloc(struct_size(async_desc, desc, num_alloc), GFP_NOWAIT); diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c index e6ebd688d746..52a7c8f2498f 100644 --- a/drivers/dma/qcom/gpi.c +++ b/drivers/dma/qcom/gpi.c @@ -1856,7 +1856,7 @@ static void gpi_issue_pending(struct dma_chan *chan) read_lock_irqsave(&gpii->pm_lock, pm_lock_flags); - /* move all submitted discriptors to issued list */ + /* move all submitted descriptors to issued list */ spin_lock_irqsave(&gchan->vc.lock, flags); if (vchan_issue_pending(&gchan->vc)) vd = list_last_entry(&gchan->vc.desc_issued, diff --git a/drivers/dma/qcom/qcom_adm.c b/drivers/dma/qcom/qcom_adm.c index 53f4273b657c..c1db398adc84 100644 --- a/drivers/dma/qcom/qcom_adm.c +++ b/drivers/dma/qcom/qcom_adm.c @@ -650,7 +650,7 @@ static enum dma_status adm_tx_status(struct dma_chan *chan, dma_cookie_t cookie, /* * residue is either the full length if it is in the issued list, or 0 * if it is in progress. We have no reliable way of determining - * anything inbetween + * anything in between */ dma_set_residue(txstate, residue); diff --git a/drivers/dma/sh/shdmac.c b/drivers/dma/sh/shdmac.c index 7cc9eb2217e8..8ead0a1fd237 100644 --- a/drivers/dma/sh/shdmac.c +++ b/drivers/dma/sh/shdmac.c @@ -318,7 +318,7 @@ static void sh_dmae_setup_xfer(struct shdma_chan *schan, } /* - * Find a slave channel configuration from the contoller list by either a slave + * Find a slave channel configuration from the controller list by either a slave * ID in the non-DT case, or by a MID/RID value in the DT case */ static const struct sh_dmae_slave_config *dmae_find_slave( diff --git a/drivers/dma/ste_dma40.h b/drivers/dma/ste_dma40.h index c697bfe16a01..a90c786acc1f 100644 --- a/drivers/dma/ste_dma40.h +++ b/drivers/dma/ste_dma40.h @@ -4,7 +4,7 @@ #define STE_DMA40_H /* - * Maxium size for a single dma descriptor + * Maximum size for a single dma descriptor * Size is limited to 16 bits. * Size is in the units of addr-widths (1,2,4,8 bytes) * Larger transfers will be split up to multiple linked desc diff --git a/drivers/dma/ste_dma40_ll.h b/drivers/dma/ste_dma40_ll.h index c504e855eb02..2e30e9a94a1e 100644 --- a/drivers/dma/ste_dma40_ll.h +++ b/drivers/dma/ste_dma40_ll.h @@ -369,7 +369,7 @@ struct d40_phy_lli_bidir { * @lcsp02: Either maps to register lcsp0 if src or lcsp2 if dst. * @lcsp13: Either maps to register lcsp1 if src or lcsp3 if dst. * - * This struct must be 8 bytes aligned since it will be accessed directy by + * This struct must be 8 bytes aligned since it will be accessed directly by * the DMA. Never add any none hw mapped registers to this struct. */ diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index ac69778827f2..7d1acda2d72b 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -463,7 +463,7 @@ static void tegra_dma_configure_for_next(struct tegra_dma_channel *tdc, /* * If interrupt is pending then do nothing as the ISR will handle - * the programing for new request. + * the programming for new request. */ if (status & TEGRA_APBDMA_STATUS_ISE_EOC) { dev_err(tdc2dev(tdc), diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h index d349c6d482ae..9062a237cd16 100644 --- a/drivers/dma/ti/k3-udma.h +++ b/drivers/dma/ti/k3-udma.h @@ -131,7 +131,6 @@ int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread, struct udma_dev *of_xudma_dev_get(struct device_node *np, const char *property); struct device *xudma_get_device(struct udma_dev *ud); struct k3_ringacc *xudma_get_ringacc(struct udma_dev *ud); -void xudma_dev_put(struct udma_dev *ud); u32 xudma_dev_get_psil_base(struct udma_dev *ud); struct udma_tisci_rm *xudma_dev_get_tisci_rm(struct udma_dev *ud); diff --git a/drivers/dma/xgene-dma.c b/drivers/dma/xgene-dma.c index fd4397adeb79..275848a9c450 100644 --- a/drivers/dma/xgene-dma.c +++ b/drivers/dma/xgene-dma.c @@ -1742,7 +1742,7 @@ static int xgene_dma_probe(struct platform_device *pdev) /* Initialize DMA channels software state */ xgene_dma_init_channels(pdma); - /* Configue DMA rings */ + /* Configure DMA rings */ ret = xgene_dma_init_rings(pdma); if (ret) goto err_clk_enable; diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_dpdma.c index 36bd4825d389..be87764af9e8 100644 --- a/drivers/dma/xilinx/xilinx_dpdma.c +++ b/drivers/dma/xilinx/xilinx_dpdma.c @@ -149,7 +149,7 @@ struct xilinx_dpdma_chan; * @addr_ext: upper 16 bit of 48 bit address (next_desc and src_addr) * @next_desc: next descriptor 32 bit address * @src_addr: payload source address (1st page, 32 LSB) - * @addr_ext_23: payload source address (3nd and 3rd pages, 16 LSBs) + * @addr_ext_23: payload source address (2nd and 3rd pages, 16 LSBs) * @addr_ext_45: payload source address (4th and 5th pages, 16 LSBs) * @src_addr2: payload source address (2nd page, 32 LSB) * @src_addr3: payload source address (3rd page, 32 LSB) @@ -210,7 +210,7 @@ struct xilinx_dpdma_tx_desc { * @vchan: virtual DMA channel * @reg: register base address * @id: channel ID - * @wait_to_stop: queue to wait for outstanding transacitons before stopping + * @wait_to_stop: queue to wait for outstanding transactions before stopping * @running: true if the channel is running * @first_frame: flag for the first frame of stream * @video_group: flag if multi-channel operation is needed for video channels @@ -671,6 +671,84 @@ static void xilinx_dpdma_chan_free_tx_desc(struct virt_dma_desc *vdesc) } /** + * xilinx_dpdma_chan_prep_cyclic - Prepare a cyclic dma descriptor + * @chan: DPDMA channel + * @buf_addr: buffer address + * @buf_len: buffer length + * @period_len: number of periods + * @flags: tx flags argument passed in to prepare function + * + * Prepare a tx descriptor incudling internal software/hardware descriptors + * for the given cyclic transaction. + * + * Return: A dma async tx descriptor on success, or NULL. + */ +static struct dma_async_tx_descriptor * +xilinx_dpdma_chan_prep_cyclic(struct xilinx_dpdma_chan *chan, + dma_addr_t buf_addr, size_t buf_len, + size_t period_len, unsigned long flags) +{ + struct xilinx_dpdma_tx_desc *tx_desc; + struct xilinx_dpdma_sw_desc *sw_desc, *last = NULL; + unsigned int periods = buf_len / period_len; + unsigned int i; + + tx_desc = xilinx_dpdma_chan_alloc_tx_desc(chan); + if (!tx_desc) + return NULL; + + for (i = 0; i < periods; i++) { + struct xilinx_dpdma_hw_desc *hw_desc; + + if (!IS_ALIGNED(buf_addr, XILINX_DPDMA_ALIGN_BYTES)) { + dev_err(chan->xdev->dev, + "buffer should be aligned at %d B\n", + XILINX_DPDMA_ALIGN_BYTES); + goto error; + } + + sw_desc = xilinx_dpdma_chan_alloc_sw_desc(chan); + if (!sw_desc) + goto error; + + xilinx_dpdma_sw_desc_set_dma_addrs(chan->xdev, sw_desc, last, + &buf_addr, 1); + hw_desc = &sw_desc->hw; + hw_desc->xfer_size = period_len; + hw_desc->hsize_stride = + FIELD_PREP(XILINX_DPDMA_DESC_HSIZE_STRIDE_HSIZE_MASK, + period_len) | + FIELD_PREP(XILINX_DPDMA_DESC_HSIZE_STRIDE_STRIDE_MASK, + period_len); + hw_desc->control = XILINX_DPDMA_DESC_CONTROL_PREEMBLE | + XILINX_DPDMA_DESC_CONTROL_IGNORE_DONE | + XILINX_DPDMA_DESC_CONTROL_COMPLETE_INTR; + + list_add_tail(&sw_desc->node, &tx_desc->descriptors); + + buf_addr += period_len; + last = sw_desc; + } + + sw_desc = list_first_entry(&tx_desc->descriptors, + struct xilinx_dpdma_sw_desc, node); + last->hw.next_desc = lower_32_bits(sw_desc->dma_addr); + if (chan->xdev->ext_addr) + last->hw.addr_ext |= + FIELD_PREP(XILINX_DPDMA_DESC_ADDR_EXT_NEXT_ADDR_MASK, + upper_32_bits(sw_desc->dma_addr)); + + last->hw.control |= XILINX_DPDMA_DESC_CONTROL_LAST_OF_FRAME; + + return vchan_tx_prep(&chan->vchan, &tx_desc->vdesc, flags); + +error: + xilinx_dpdma_chan_free_tx_desc(&tx_desc->vdesc); + + return NULL; +} + +/** * xilinx_dpdma_chan_prep_interleaved_dma - Prepare an interleaved dma * descriptor * @chan: DPDMA channel @@ -1189,6 +1267,23 @@ out_unlock: /* ----------------------------------------------------------------------------- * DMA Engine Operations */ +static struct dma_async_tx_descriptor * +xilinx_dpdma_prep_dma_cyclic(struct dma_chan *dchan, dma_addr_t buf_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction direction, + unsigned long flags) +{ + struct xilinx_dpdma_chan *chan = to_xilinx_chan(dchan); + + if (direction != DMA_MEM_TO_DEV) + return NULL; + + if (buf_len % period_len) + return NULL; + + return xilinx_dpdma_chan_prep_cyclic(chan, buf_addr, buf_len, + period_len, flags); +} static struct dma_async_tx_descriptor * xilinx_dpdma_prep_interleaved_dma(struct dma_chan *dchan, @@ -1672,6 +1767,7 @@ static int xilinx_dpdma_probe(struct platform_device *pdev) dma_cap_set(DMA_SLAVE, ddev->cap_mask); dma_cap_set(DMA_PRIVATE, ddev->cap_mask); + dma_cap_set(DMA_CYCLIC, ddev->cap_mask); dma_cap_set(DMA_INTERLEAVE, ddev->cap_mask); dma_cap_set(DMA_REPEAT, ddev->cap_mask); dma_cap_set(DMA_LOAD_EOT, ddev->cap_mask); @@ -1679,6 +1775,7 @@ static int xilinx_dpdma_probe(struct platform_device *pdev) ddev->device_alloc_chan_resources = xilinx_dpdma_alloc_chan_resources; ddev->device_free_chan_resources = xilinx_dpdma_free_chan_resources; + ddev->device_prep_dma_cyclic = xilinx_dpdma_prep_dma_cyclic; ddev->device_prep_interleaved_dma = xilinx_dpdma_prep_interleaved_dma; /* TODO: Can we achieve better granularity ? */ ddev->device_tx_status = dma_cookie_status; diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index f31631bef961..9ae46f1198fe 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -22,10 +22,10 @@ #include "../dmaengine.h" /* Register Offsets */ -#define ZYNQMP_DMA_ISR 0x100 -#define ZYNQMP_DMA_IMR 0x104 -#define ZYNQMP_DMA_IER 0x108 -#define ZYNQMP_DMA_IDS 0x10C +#define ZYNQMP_DMA_ISR (chan->irq_offset + 0x100) +#define ZYNQMP_DMA_IMR (chan->irq_offset + 0x104) +#define ZYNQMP_DMA_IER (chan->irq_offset + 0x108) +#define ZYNQMP_DMA_IDS (chan->irq_offset + 0x10c) #define ZYNQMP_DMA_CTRL0 0x110 #define ZYNQMP_DMA_CTRL1 0x114 #define ZYNQMP_DMA_DATA_ATTR 0x120 @@ -145,6 +145,9 @@ #define tx_to_desc(tx) container_of(tx, struct zynqmp_dma_desc_sw, \ async_tx) +/* IRQ Register offset for Versal Gen 2 */ +#define IRQ_REG_OFFSET 0x308 + /** * struct zynqmp_dma_desc_ll - Hw linked list descriptor * @addr: Buffer address @@ -211,6 +214,7 @@ struct zynqmp_dma_desc_sw { * @bus_width: Bus width * @src_burst_len: Source burst length * @dst_burst_len: Dest burst length + * @irq_offset: Irq register offset */ struct zynqmp_dma_chan { struct zynqmp_dma_device *zdev; @@ -235,6 +239,7 @@ struct zynqmp_dma_chan { u32 bus_width; u32 src_burst_len; u32 dst_burst_len; + u32 irq_offset; }; /** @@ -253,6 +258,14 @@ struct zynqmp_dma_device { struct clk *clk_apb; }; +struct zynqmp_dma_config { + u32 offset; +}; + +static const struct zynqmp_dma_config versal2_dma_config = { + .offset = IRQ_REG_OFFSET, +}; + static inline void zynqmp_dma_writeq(struct zynqmp_dma_chan *chan, u32 reg, u64 value) { @@ -892,6 +905,7 @@ static int zynqmp_dma_chan_probe(struct zynqmp_dma_device *zdev, { struct zynqmp_dma_chan *chan; struct device_node *node = pdev->dev.of_node; + const struct zynqmp_dma_config *match_data; int err; chan = devm_kzalloc(zdev->dev, sizeof(*chan), GFP_KERNEL); @@ -919,6 +933,10 @@ static int zynqmp_dma_chan_probe(struct zynqmp_dma_device *zdev, return -EINVAL; } + match_data = of_device_get_match_data(&pdev->dev); + if (match_data) + chan->irq_offset = match_data->offset; + chan->is_dmacoherent = of_property_read_bool(node, "dma-coherent"); zdev->chan = chan; tasklet_setup(&chan->tasklet, zynqmp_dma_do_tasklet); @@ -1161,6 +1179,7 @@ static void zynqmp_dma_remove(struct platform_device *pdev) } static const struct of_device_id zynqmp_dma_of_match[] = { + { .compatible = "amd,versal2-dma-1.0", .data = &versal2_dma_config }, { .compatible = "xlnx,zynqmp-dma-1.0", }, {} }; |