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 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 37 | ||||
| -rw-r--r-- | drivers/pci/proc.c | 17 |
5 files changed, 63 insertions, 32 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); diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index a04197ce767d..dbfe7c4f3776 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1910,7 +1910,7 @@ void pci_pme_active(struct pci_dev *dev, bool enable) EXPORT_SYMBOL(pci_pme_active); /** - * pci_enable_wake - enable PCI device as wakeup event source + * __pci_enable_wake - enable PCI device as wakeup event source * @dev: PCI device affected * @state: PCI state from which device will issue wakeup events * @enable: True to enable event generation; false to disable @@ -1928,7 +1928,7 @@ EXPORT_SYMBOL(pci_pme_active); * Error code depending on the platform is returned if both the platform and * the native mechanism fail to enable the generation of wake-up events */ -int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable) +static int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable) { int ret = 0; @@ -1969,6 +1969,23 @@ int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable) return ret; } + +/** + * pci_enable_wake - change wakeup settings for a PCI device + * @pci_dev: Target device + * @state: PCI state from which device will issue wakeup events + * @enable: Whether or not to enable event generation + * + * If @enable is set, check device_may_wakeup() for the device before calling + * __pci_enable_wake() for it. + */ +int pci_enable_wake(struct pci_dev *pci_dev, pci_power_t state, bool enable) +{ + if (enable && !device_may_wakeup(&pci_dev->dev)) + return -EINVAL; + + return __pci_enable_wake(pci_dev, state, enable); +} EXPORT_SYMBOL(pci_enable_wake); /** @@ -1981,9 +1998,9 @@ EXPORT_SYMBOL(pci_enable_wake); * should not be called twice in a row to enable wake-up due to PCI PM vs ACPI * ordering constraints. * - * This function only returns error code if the device is not capable of - * generating PME# from both D3_hot and D3_cold, and the platform is unable to - * enable wake-up power for it. + * This function only returns error code if the device is not allowed to wake + * up the system from sleep or it is not capable of generating PME# from both + * D3_hot and D3_cold and the platform is unable to enable wake-up power for it. */ int pci_wake_from_d3(struct pci_dev *dev, bool enable) { @@ -2114,7 +2131,7 @@ int pci_finish_runtime_suspend(struct pci_dev *dev) dev->runtime_d3cold = target_state == PCI_D3cold; - pci_enable_wake(dev, target_state, pci_dev_run_wake(dev)); + __pci_enable_wake(dev, target_state, pci_dev_run_wake(dev)); error = pci_set_power_state(dev, target_state); @@ -2138,16 +2155,16 @@ bool pci_dev_run_wake(struct pci_dev *dev) { struct pci_bus *bus = dev->bus; - if (device_can_wakeup(&dev->dev)) - return true; - if (!dev->pme_support) return false; /* PME-capable in principle, but not from the target power state */ - if (!pci_pme_capable(dev, pci_target_state(dev, false))) + if (!pci_pme_capable(dev, pci_target_state(dev, true))) return false; + if (device_can_wakeup(&dev->dev)) + return true; + while (bus->parent) { struct pci_dev *bridge = bus->self; diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c index 1ee8927a0635..7ac035af39f0 100644 --- a/drivers/pci/proc.c +++ b/drivers/pci/proc.c @@ -435,25 +435,12 @@ int pci_proc_detach_bus(struct pci_bus *bus) return 0; } -static int proc_bus_pci_dev_open(struct inode *inode, struct file *file) -{ - return seq_open(file, &proc_bus_pci_devices_op); -} - -static const struct file_operations proc_bus_pci_dev_operations = { - .owner = THIS_MODULE, - .open = proc_bus_pci_dev_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - static int __init pci_proc_init(void) { struct pci_dev *dev = NULL; proc_bus_pci_dir = proc_mkdir("bus/pci", NULL); - proc_create("devices", 0, proc_bus_pci_dir, - &proc_bus_pci_dev_operations); + proc_create_seq("devices", 0, proc_bus_pci_dir, + &proc_bus_pci_devices_op); proc_initialized = 1; for_each_pci_dev(dev) pci_proc_attach_device(dev); |