*/
static void release_pcie_device(struct device *dev)
{
- kfree(to_pcie_device(dev));
+ kfree(to_pcie_device(dev));
}
/**
* the value in this field indicates which MSI-X Table entry is
* used to generate the interrupt message."
*/
- pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
- pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®16);
- entry = (reg16 >> 9) & PCIE_PORT_MSI_VECTOR_MASK;
+ pos = pci_pcie_cap(dev);
+ pci_read_config_word(dev, pos + PCI_EXP_FLAGS, ®16);
+ entry = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9;
if (entry >= nr_entries)
goto Error;
}
/**
- * assign_interrupt_mode - choose interrupt mode for PCI Express port services
- * (INTx, MSI-X, MSI) and set up vectors
+ * init_service_irqs - initialize irqs for PCI Express port services
* @dev: PCI Express port to handle
- * @vectors: Array of interrupt vectors to populate
+ * @irqs: Array of irqs 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)
+static int init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
{
- struct pcie_port_data *port_data = pci_get_drvdata(dev);
- int irq, interrupt_mode = PCIE_PORT_NO_IRQ;
- int i;
+ int i, irq = -1;
- /* Check MSI quirk */
- if (port_data->port_type == PCIE_RC_PORT && pcie_mch_quirk)
- goto Fallback;
+ /* We have to use INTx if MSI cannot be used for PCIe PME. */
+ if ((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) {
+ if (dev->pin)
+ irq = dev->irq;
+ goto no_msi;
+ }
/* Try to use MSI-X if supported */
- if (!pcie_port_enable_msix(dev, vectors, mask))
- return PCIE_PORT_MSIX_MODE;
+ if (!pcie_port_enable_msix(dev, irqs, mask))
+ return 0;
/* We're not going to use MSI-X, so try MSI and fall back to INTx */
- if (!pci_enable_msi(dev))
- interrupt_mode = PCIE_PORT_MSI_MODE;
-
- Fallback:
- if (interrupt_mode == PCIE_PORT_NO_IRQ && dev->pin)
- interrupt_mode = PCIE_PORT_INTx_MODE;
+ if (!pci_enable_msi(dev) || dev->pin)
+ irq = dev->irq;
- irq = interrupt_mode != PCIE_PORT_NO_IRQ ? dev->irq : -1;
+ no_msi:
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
- vectors[i] = irq;
+ irqs[i] = irq;
+ irqs[PCIE_PORT_SERVICE_VC_SHIFT] = -1;
- vectors[PCIE_PORT_SERVICE_VC_SHIFT] = -1;
+ if (irq < 0)
+ return -ENODEV;
+ return 0;
+}
- return interrupt_mode;
+static void cleanup_service_irqs(struct pci_dev *dev)
+{
+ if (dev->msix_enabled)
+ pci_disable_msix(dev);
+ else if (dev->msi_enabled)
+ pci_disable_msi(dev);
}
/**
u16 reg16;
u32 reg32;
- pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
- pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®16);
+ pos = pci_pcie_cap(dev);
+ pci_read_config_word(dev, pos + PCI_EXP_FLAGS, ®16);
/* Hot-Plug Capable */
- if (reg16 & PORT_TO_SLOT_MASK) {
- pci_read_config_dword(dev,
- pos + PCIE_SLOT_CAPABILITIES_REG, ®32);
- if (reg32 & SLOT_HP_CAPABLE_MASK)
+ if (reg16 & PCI_EXP_FLAGS_SLOT) {
+ pci_read_config_dword(dev, pos + PCI_EXP_SLTCAP, ®32);
+ if (reg32 & PCI_EXP_SLTCAP_HPC)
services |= PCIE_PORT_SERVICE_HP;
}
/* AER capable */
/* VC support */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC))
services |= PCIE_PORT_SERVICE_VC;
+ /* Root ports are capable of generating PME too */
+ if (dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT)
+ services |= PCIE_PORT_SERVICE_PME;
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
+ * pcie_device_init - allocate and initialize PCI Express port service device
+ * @pdev: PCI Express port to associate the service device with
+ * @service: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
*/
-static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
- int service_type, int irq)
+static int pcie_device_init(struct pci_dev *pdev, int service, int irq)
{
- struct pcie_port_data *port_data = pci_get_drvdata(parent);
+ int retval;
+ struct pcie_device *pcie;
struct device *device;
- int port_type = port_data->port_type;
- dev->port = parent;
- dev->irq = irq;
- dev->service = service_type;
+ pcie = kzalloc(sizeof(*pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+ pcie->port = pdev;
+ pcie->irq = irq;
+ pcie->service = service;
/* Initialize generic device interface */
- device = &dev->device;
- memset(device, 0, sizeof(struct device));
+ device = &pcie->device;
device->bus = &pcie_port_bus_type;
- device->driver = NULL;
- device->driver_data = NULL;
device->release = release_pcie_device; /* callback to free pcie dev */
dev_set_name(device, "%s:pcie%02x",
- pci_name(parent), get_descriptor_id(port_type, service_type));
- 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
- */
-static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
- int service_type, int irq)
-{
- struct pcie_device *device;
-
- device = kzalloc(sizeof(struct pcie_device), GFP_KERNEL);
- if (!device)
- return NULL;
-
- pcie_device_init(parent, device, service_type, irq);
- 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;
- u16 reg;
-
- if (!(pos = pci_find_capability(dev, PCI_CAP_ID_EXP)))
- return -ENODEV;
-
- pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®);
- type = (reg >> 4) & PORT_TYPE_MASK;
- if ( type == PCIE_RC_PORT || type == PCIE_SW_UPSTREAM_PORT ||
- type == PCIE_SW_DOWNSTREAM_PORT )
- return 0;
-
- return -ENODEV;
+ pci_name(pdev),
+ get_descriptor_id(pdev->pcie_type, service));
+ device->parent = &pdev->dev;
+ device_enable_async_suspend(device);
+
+ retval = device_register(device);
+ if (retval)
+ kfree(pcie);
+ else
+ get_device(device);
+ return retval;
}
/**
*/
int pcie_port_device_register(struct pci_dev *dev)
{
- struct pcie_port_data *port_data;
- int status, capabilities, irq_mode, i, nr_serv;
- int vectors[PCIE_PORT_DEVICE_MAXSERVICES];
- u16 reg16;
-
- port_data = kzalloc(sizeof(*port_data), GFP_KERNEL);
- if (!port_data)
- return -ENOMEM;
- pci_set_drvdata(dev, port_data);
-
- /* Get port type */
- pci_read_config_word(dev,
- pci_find_capability(dev, PCI_CAP_ID_EXP) +
- PCIE_CAPABILITIES_REG, ®16);
- port_data->port_type = (reg16 >> 4) & PORT_TYPE_MASK;
+ int status, capabilities, i, nr_service;
+ int irqs[PCIE_PORT_DEVICE_MAXSERVICES];
+ /* Get and check PCI Express port services */
capabilities = get_port_device_capability(dev);
- /* Root ports are capable of generating PME too */
- if (port_data->port_type == PCIE_RC_PORT)
- capabilities |= PCIE_PORT_SERVICE_PME;
-
- irq_mode = assign_interrupt_mode(dev, vectors, capabilities);
- if (irq_mode == PCIE_PORT_NO_IRQ) {
- /*
- * Don't use service devices that require interrupts if there is
- * no way to generate them.
- */
- if (!(capabilities & PCIE_PORT_SERVICE_VC)) {
- status = -ENODEV;
- goto Error;
- }
- capabilities = PCIE_PORT_SERVICE_VC;
- }
- port_data->port_irq_mode = irq_mode;
+ if (!capabilities)
+ return -ENODEV;
+ /* Enable PCI Express port device */
status = pci_enable_device(dev);
if (status)
- goto Error;
+ return status;
pci_set_master(dev);
+ /*
+ * Initialize service irqs. Don't use service devices that
+ * require interrupts if there is no way to generate them.
+ */
+ status = init_service_irqs(dev, irqs, capabilities);
+ if (status) {
+ capabilities &= PCIE_PORT_SERVICE_VC;
+ if (!capabilities)
+ goto error_disable;
+ }
/* Allocate child services if any */
- for (i = 0, nr_serv = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
- struct pcie_device *child;
+ status = -ENODEV;
+ nr_service = 0;
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
int service = 1 << i;
-
if (!(capabilities & service))
continue;
-
- child = alloc_pcie_device(dev, service, vectors[i]);
- if (!child)
- continue;
-
- status = device_register(&child->device);
- if (status) {
- kfree(child);
- continue;
- }
-
- get_device(&child->device);
- nr_serv++;
- }
- if (!nr_serv) {
- pci_disable_device(dev);
- status = -ENODEV;
- goto Error;
+ if (!pcie_device_init(dev, service, irqs[i]))
+ nr_service++;
}
+ if (!nr_service)
+ goto error_cleanup_irqs;
return 0;
- Error:
- kfree(port_data);
+error_cleanup_irqs:
+ cleanup_service_irqs(dev);
+error_disable:
+ pci_disable_device(dev);
return status;
}
static int suspend_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
- pm_message_t state = * (pm_message_t *) data;
-
- if ((dev->bus == &pcie_port_bus_type) &&
- (dev->driver)) {
- service_driver = to_service_driver(dev->driver);
- if (service_driver->suspend)
- service_driver->suspend(to_pcie_device(dev), state);
- }
+
+ if ((dev->bus == &pcie_port_bus_type) && dev->driver) {
+ service_driver = to_service_driver(dev->driver);
+ if (service_driver->suspend)
+ service_driver->suspend(to_pcie_device(dev));
+ }
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)
+int pcie_port_device_suspend(struct device *dev)
{
- return device_for_each_child(&dev->dev, &state, suspend_iter);
+ return device_for_each_child(dev, NULL, suspend_iter);
}
static int resume_iter(struct device *dev, void *data)
* 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)
+int pcie_port_device_resume(struct device *dev)
{
- return device_for_each_child(&dev->dev, NULL, resume_iter);
+ return device_for_each_child(dev, NULL, resume_iter);
}
-#endif
+#endif /* PM */
static int remove_iter(struct device *dev, void *data)
{
*/
void pcie_port_device_remove(struct pci_dev *dev)
{
- struct pcie_port_data *port_data = pci_get_drvdata(dev);
-
device_for_each_child(&dev->dev, NULL, remove_iter);
-
- switch (port_data->port_irq_mode) {
- case PCIE_PORT_MSIX_MODE:
- pci_disable_msix(dev);
- break;
- case PCIE_PORT_MSI_MODE:
- pci_disable_msi(dev);
- break;
- }
-
- kfree(port_data);
+ cleanup_service_irqs(dev);
+ pci_disable_device(dev);
}
/**
return driver_register(&new->driver);
}
+EXPORT_SYMBOL(pcie_port_service_register);
/**
* pcie_port_service_unregister - unregister PCI Express port service driver
{
driver_unregister(&drv->driver);
}
-
-EXPORT_SYMBOL(pcie_port_service_register);
EXPORT_SYMBOL(pcie_port_service_unregister);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff