diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pcie/portdrv_core.c | 77 |
1 files changed, 70 insertions, 7 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 6a9f83ccaff..8f09b353d2a 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -94,12 +94,12 @@ static int pcie_port_resume_service(struct device *dev) return 0; } -/* - * release_pcie_device - * - * Being invoked automatically when device is being removed - * in response to device_unregister(dev) call. - * Release all resources being claimed. +/** + * release_pcie_device - free PCI Express port service device structure + * @dev: Port service device to release + * + * Invoked automatically when device is being removed in response to + * device_unregister(dev). Release all resources being claimed. */ static void release_pcie_device(struct device *dev) { @@ -127,7 +127,16 @@ static int is_msi_quirked(struct pci_dev *dev) } return quirk; } - + +/** + * assign_interrupt_mode - choose interrupt mode for PCI Express port services + * (INTx, MSI-X, MSI) and set up vectors + * @dev: PCI Express port to handle + * @vectors: Array of interrupt vectors to populate + * @mask: Bitmask of port capabilities returned by get_port_device_capability() + * + * Return value: Interrupt mode associated with the port + */ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask) { int i, pos, nvec, status = -EINVAL; @@ -174,6 +183,16 @@ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask) return interrupt_mode; } +/** + * get_port_device_capability - discover capabilities of a PCI Express port + * @dev: PCI Express port to examine + * + * The capabilities are read from the port's PCI Express configuration registers + * as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and + * 7.9 - 7.11. + * + * Return value: Bitmask of discovered port capabilities + */ static int get_port_device_capability(struct pci_dev *dev) { int services = 0, pos; @@ -201,6 +220,15 @@ static int get_port_device_capability(struct pci_dev *dev) return services; } +/** + * pcie_device_init - initialize PCI Express port service device + * @dev: Port service device to initialize + * @parent: PCI Express port to associate the service device with + * @port_type: Type of the port + * @service_type: Type of service to associate with the service device + * @irq: Interrupt vector to associate with the service device + * @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI) + */ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev, int port_type, int service_type, int irq, int irq_mode) { @@ -226,6 +254,14 @@ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev, device->parent = &parent->dev; } +/** + * alloc_pcie_device - allocate PCI Express port service device structure + * @parent: PCI Express port to associate the service device with + * @port_type: Type of the port + * @service_type: Type of service to associate with the service device + * @irq: Interrupt vector to associate with the service device + * @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI) + */ static struct pcie_device* alloc_pcie_device(struct pci_dev *parent, int port_type, int service_type, int irq, int irq_mode) { @@ -239,6 +275,10 @@ static struct pcie_device* alloc_pcie_device(struct pci_dev *parent, return device; } +/** + * pcie_port_device_probe - check if device is a PCI Express port + * @dev: Device to check + */ int pcie_port_device_probe(struct pci_dev *dev) { int pos, type; @@ -256,6 +296,13 @@ int pcie_port_device_probe(struct pci_dev *dev) return -ENODEV; } +/** + * pcie_port_device_register - register PCI Express port + * @dev: PCI Express port to register + * + * Allocate the port extension structure and register services associated with + * the port. + */ int pcie_port_device_register(struct pci_dev *dev) { struct pcie_port_device_ext *p_ext; @@ -319,6 +366,11 @@ static int suspend_iter(struct device *dev, void *data) return 0; } +/** + * pcie_port_device_suspend - suspend port services associated with a PCIe port + * @dev: PCI Express port to handle + * @state: Representation of system power management transition in progress + */ int pcie_port_device_suspend(struct pci_dev *dev, pm_message_t state) { return device_for_each_child(&dev->dev, &state, suspend_iter); @@ -337,6 +389,10 @@ static int resume_iter(struct device *dev, void *data) return 0; } +/** + * pcie_port_device_suspend - resume port services associated with a PCIe port + * @dev: PCI Express port to handle + */ int pcie_port_device_resume(struct pci_dev *dev) { return device_for_each_child(&dev->dev, NULL, resume_iter); @@ -359,6 +415,13 @@ static int remove_iter(struct device *dev, void *data) return 0; } +/** + * pcie_port_device_remove - unregister PCI Express port service devices + * @dev: PCI Express port the service devices to unregister are associated with + * + * Remove PCI Express port service devices associated with given port and + * disable MSI-X or MSI for the port. + */ void pcie_port_device_remove(struct pci_dev *dev) { struct device *device; |