diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/amba/bus.c | 4 | ||||
| -rw-r--r-- | drivers/base/dma-mapping.c | 31 | ||||
| -rw-r--r-- | drivers/base/platform.c | 17 | ||||
| -rw-r--r-- | drivers/gpu/host1x/bus.c | 6 | ||||
| -rw-r--r-- | drivers/pci/pci-driver.c | 32 |
5 files changed, 63 insertions, 27 deletions
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 4a3ac31c07d0..b1f41f7d8eeb 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -20,6 +20,7 @@ #include <linux/sizes.h> #include <linux/limits.h> #include <linux/clk/clk-conf.h> +#include <linux/platform_device.h> #include <asm/irq.h> @@ -193,12 +194,15 @@ static const struct dev_pm_ops amba_pm = { /* * Primecells are part of the Advanced Microcontroller Bus Architecture, * so we call the bus "amba". + * DMA configuration for platform and AMBA bus is same. So here we reuse + * platform's DMA config routine. */ struct bus_type amba_bustype = { .name = "amba", .dev_groups = amba_dev_groups, .match = amba_match, .uevent = amba_uevent, + .dma_configure = platform_dma_configure, .pm = &amba_pm, .force_dma = true, }; diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index d82566d6e237..f831a582209c 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -329,36 +329,13 @@ void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags) #endif /* - * Common configuration to enable DMA API use for a device + * enables DMA API use for a device */ -#include <linux/pci.h> - int dma_configure(struct device *dev) { - struct device *bridge = NULL, *dma_dev = dev; - enum dev_dma_attr attr; - int ret = 0; - - if (dev_is_pci(dev)) { - bridge = pci_get_host_bridge_device(to_pci_dev(dev)); - dma_dev = bridge; - if (IS_ENABLED(CONFIG_OF) && dma_dev->parent && - dma_dev->parent->of_node) - dma_dev = dma_dev->parent; - } - - if (dma_dev->of_node) { - ret = of_dma_configure(dev, dma_dev->of_node); - } else if (has_acpi_companion(dma_dev)) { - attr = acpi_get_dma_attr(to_acpi_device_node(dma_dev->fwnode)); - if (attr != DEV_DMA_NOT_SUPPORTED) - ret = acpi_dma_configure(dev, attr); - } - - if (bridge) - pci_put_host_bridge_device(bridge); - - return ret; + if (dev->bus->dma_configure) + return dev->bus->dma_configure(dev); + return 0; } void dma_deconfigure(struct device *dev) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 8075ddc70a17..638d42e93772 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1130,6 +1130,22 @@ int platform_pm_restore(struct device *dev) #endif /* CONFIG_HIBERNATE_CALLBACKS */ +int platform_dma_configure(struct device *dev) +{ + enum dev_dma_attr attr; + int ret = 0; + + if (dev->of_node) { + ret = of_dma_configure(dev, dev->of_node); + } else if (has_acpi_companion(dev)) { + attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode)); + if (attr != DEV_DMA_NOT_SUPPORTED) + ret = acpi_dma_configure(dev, attr); + } + + return ret; +} + static const struct dev_pm_ops platform_dev_pm_ops = { .runtime_suspend = pm_generic_runtime_suspend, .runtime_resume = pm_generic_runtime_resume, @@ -1141,6 +1157,7 @@ struct bus_type platform_bus_type = { .dev_groups = platform_dev_groups, .match = platform_match, .uevent = platform_uevent, + .dma_configure = platform_dma_configure, .pm = &platform_dev_pm_ops, .force_dma = true, }; diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index 88a3558b7916..0c79bafae96c 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -314,6 +314,11 @@ static int host1x_device_match(struct device *dev, struct device_driver *drv) return strcmp(dev_name(dev), drv->name) == 0; } +static int host1x_dma_configure(struct device *dev) +{ + return of_dma_configure(dev, dev->of_node); +} + static const struct dev_pm_ops host1x_device_pm_ops = { .suspend = pm_generic_suspend, .resume = pm_generic_resume, @@ -326,6 +331,7 @@ static const struct dev_pm_ops host1x_device_pm_ops = { struct bus_type host1x_bus_type = { .name = "host1x", .match = host1x_device_match, + .dma_configure = host1x_dma_configure, .pm = &host1x_device_pm_ops, .force_dma = true, }; diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index b9a131137e64..ba8c6b46269e 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); + } 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, @@ -1589,6 +1620,7 @@ struct bus_type pci_bus_type = { .drv_groups = pci_drv_groups, .pm = PCI_PM_OPS_PTR, .num_vf = pci_bus_num_vf, + .dma_configure = pci_dma_configure, .force_dma = true, }; EXPORT_SYMBOL(pci_bus_type); |