This patch cleans up the service irqs initialization as follows:
- Remove 'irq_mode' field in pcie_port_data and related definitions,
which is not needed because we can get the same information from
'is_msix', 'is_msi' and 'pin' fields in struct pci_dev.
- Change the name of 'vectors' argument of assign_interrupt_mode() to
'irqs' because it holds irq numbers actually. People might confuse
it with CPU vector or MSI/MSI-X vector.
- Change function name assign_interrupt_mode() to init_service_irqs()
becasuse we no longer have 'irq_mode' data structure, and new name
is more straightforward (IMO).
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx>
---
drivers/pci/pcie/portdrv_core.c | 71 ++++++++++++++++------------------------
include/linux/pcieport_if.h | 7 ---
2 files changed, 29 insertions(+), 49 deletions(-)
Index: 20091125/drivers/pci/pcie/portdrv_core.c
===================================================================
--- 20091125.orig/drivers/pci/pcie/portdrv_core.c
+++ 20091125/drivers/pci/pcie/portdrv_core.c
@@ -177,37 +177,32 @@ static int pcie_port_enable_msix(struct
}
/**
- * 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)
{
- int irq, interrupt_mode = PCIE_PORT_NO_IRQ;
- int i;
+ int i, irq;
/* 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;
-
- if (interrupt_mode == PCIE_PORT_NO_IRQ && dev->pin)
- interrupt_mode = PCIE_PORT_INTx_MODE;
+ irq = -1;
+ if (!pci_enable_msi(dev) || dev->pin)
+ irq = dev->irq;
- irq = interrupt_mode != PCIE_PORT_NO_IRQ ? dev->irq : -1;
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;
-
- return interrupt_mode;
+ if (irq < 0)
+ return -ENODEV;
+ return 0;
}
/**
@@ -294,8 +289,8 @@ static int pcie_device_init(struct pci_d
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];
+ int status, capabilities, i, nr_serv;
+ int irqs[PCIE_PORT_DEVICE_MAXSERVICES];
capabilities = get_port_device_capability(dev);
if (!capabilities)
@@ -304,23 +299,19 @@ int pcie_port_device_register(struct pci
port_data = kzalloc(sizeof(*port_data), GFP_KERNEL);
if (!port_data)
return -ENOMEM;
- pci_set_drvdata(dev, port_data);
-
port_data->port_type = dev->pcie_type;
+ pci_set_drvdata(dev, port_data);
- 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;
+ /*
+ * 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;
- }
- capabilities = PCIE_PORT_SERVICE_VC;
}
- port_data->port_irq_mode = irq_mode;
status = pci_enable_device(dev);
if (status)
@@ -334,7 +325,7 @@ int pcie_port_device_register(struct pci
if (!(capabilities & service))
continue;
- status = pcie_device_init(dev, service, vectors[i]);
+ status = pcie_device_init(dev, service, irqs[i]);
if (!status)
nr_serv++;
}
@@ -418,17 +409,13 @@ void pcie_port_device_remove(struct pci_
struct pcie_port_data *port_data = pci_get_drvdata(dev);
device_for_each_child(&dev->dev, NULL, remove_iter);
- pci_disable_device(dev);
- switch (port_data->port_irq_mode) {
- case PCIE_PORT_MSIX_MODE:
+ if (dev->msix_enabled)
pci_disable_msix(dev);
- break;
- case PCIE_PORT_MSI_MODE:
+ else if (dev->msi_enabled)
pci_disable_msi(dev);
- break;
- }
+ pci_disable_device(dev);
kfree(port_data);
}
Index: 20091125/include/linux/pcieport_if.h
===================================================================
--- 20091125.orig/include/linux/pcieport_if.h
+++ 20091125/include/linux/pcieport_if.h
@@ -25,15 +25,8 @@
#define PCIE_PORT_SERVICE_VC_SHIFT 3 /* Virtual Channel */
#define PCIE_PORT_SERVICE_VC (1 << PCIE_PORT_SERVICE_VC_SHIFT)
-/* Root/Upstream/Downstream Port's Interrupt Mode */
-#define PCIE_PORT_NO_IRQ (-1)
-#define PCIE_PORT_INTx_MODE 0
-#define PCIE_PORT_MSI_MODE 1
-#define PCIE_PORT_MSIX_MODE 2
-
struct pcie_port_data {
int port_type; /* Type of the port */
- int port_irq_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
};
struct pcie_device {
--
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