diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/pci/bus.c | 4 | ||||
| -rw-r--r-- | drivers/pci/pci-driver.c | 33 |
3 files changed, 34 insertions, 7 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 34b56a8f8480..29a487f31dae 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -5,10 +5,6 @@ source "drivers/pci/pcie/Kconfig" -config PCI_BUS_ADDR_T_64BIT - def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT) - depends on PCI - config PCI_MSI bool "Message Signaled Interrupts (MSI and MSI-X)" depends on PCI diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index bc2ded4c451f..35b7fc87eac5 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -120,7 +120,7 @@ int devm_request_pci_bus_resources(struct device *dev, EXPORT_SYMBOL_GPL(devm_request_pci_bus_resources); static struct pci_bus_region pci_32_bit = {0, 0xffffffffULL}; -#ifdef CONFIG_PCI_BUS_ADDR_T_64BIT +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT static struct pci_bus_region pci_64_bit = {0, (pci_bus_addr_t) 0xffffffffffffffffULL}; static struct pci_bus_region pci_high = {(pci_bus_addr_t) 0x100000000ULL, @@ -230,7 +230,7 @@ int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t), void *alignf_data) { -#ifdef CONFIG_PCI_BUS_ADDR_T_64BIT +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT int rc; if (res->flags & IORESOURCE_MEM_64) { diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index b9a131137e64..f8269a725667 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -16,6 +16,8 @@ #include <linux/pm_runtime.h> #include <linux/suspend.h> #include <linux/kexec.h> +#include <linux/of_device.h> +#include <linux/acpi.h> #include "pci.h" #include "pcie/portdrv.h" @@ -1577,6 +1579,35 @@ static int pci_bus_num_vf(struct device *dev) return pci_num_vf(to_pci_dev(dev)); } +/** + * pci_dma_configure - Setup DMA configuration + * @dev: ptr to dev structure + * + * Function to update PCI devices's DMA configuration using the same + * info from the OF node or ACPI node of host bridge's parent (if any). + */ +static int pci_dma_configure(struct device *dev) +{ + struct device *bridge; + int ret = 0; + + bridge = pci_get_host_bridge_device(to_pci_dev(dev)); + + if (IS_ENABLED(CONFIG_OF) && bridge->parent && + bridge->parent->of_node) { + ret = of_dma_configure(dev, bridge->parent->of_node, true); + } else if (has_acpi_companion(bridge)) { + struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); + enum dev_dma_attr attr = acpi_get_dma_attr(adev); + + if (attr != DEV_DMA_NOT_SUPPORTED) + ret = acpi_dma_configure(dev, attr); + } + + pci_put_host_bridge_device(bridge); + return ret; +} + struct bus_type pci_bus_type = { .name = "pci", .match = pci_bus_match, @@ -1589,7 +1620,7 @@ struct bus_type pci_bus_type = { .drv_groups = pci_drv_groups, .pm = PCI_PM_OPS_PTR, .num_vf = pci_bus_num_vf, - .force_dma = true, + .dma_configure = pci_dma_configure, }; EXPORT_SYMBOL(pci_bus_type); |