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vmw_pvrdma: switch to pci_alloc_irq_vectors 

.. and greatly clean up the irq handling boilerplate code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Adit Ranadive <aditr@vmware.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Christoph Hellwig 2017-02-15 08:47:04 +01:00 committed by Doug Ledford
parent 64b2ae74e8
commit 7bf3976d6c
3 changed files with 36 additions and 144 deletions
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8
drivers/infiniband/hw/vmw_pvrdma/pvrdma.h
View File

@ -196,13 +196,7 @@ struct pvrdma_dev {
spinlock_t cmd_lock; /* Command lock. */
struct semaphore cmd_sema;
struct completion cmd_done;
struct {
enum pvrdma_intr_type type; /* Intr type */
struct msix_entry msix_entry[PVRDMA_MAX_INTERRUPTS];
irq_handler_t handler[PVRDMA_MAX_INTERRUPTS];
u8 enabled[PVRDMA_MAX_INTERRUPTS];
u8 size;
} intr;
unsigned int nr_vectors;
/* RDMA-related device information. */
union ib_gid *sgid_tbl;

6
drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h
View File

@ -149,12 +149,6 @@ enum pvrdma_intr_cause {
PVRDMA_INTR_CAUSE_CQ = (1 << PVRDMA_INTR_VECTOR_CQ),
};
enum pvrdma_intr_type {
PVRDMA_INTR_TYPE_INTX, /* Legacy. */
PVRDMA_INTR_TYPE_MSI, /* MSI. */
PVRDMA_INTR_TYPE_MSIX, /* MSI-X. */
};
enum pvrdma_gos_bits {
PVRDMA_GOS_BITS_UNK, /* Unknown. */
PVRDMA_GOS_BITS_32, /* 32-bit. */

166
drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
View File

@ -282,7 +282,7 @@ static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
if (dev->intr.type != PVRDMA_INTR_TYPE_MSIX) {
if (!dev->pdev->msix_enabled) {
/* Legacy intr */
icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
if (icr == 0)
@ -489,31 +489,13 @@ static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
static void pvrdma_disable_msi_all(struct pvrdma_dev *dev)
{
if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX)
pci_disable_msix(dev->pdev);
else if (dev->intr.type == PVRDMA_INTR_TYPE_MSI)
pci_disable_msi(dev->pdev);
}
static void pvrdma_free_irq(struct pvrdma_dev *dev)
{
int i;
dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) {
for (i = 0; i < dev->intr.size; i++) {
if (dev->intr.enabled[i]) {
free_irq(dev->intr.msix_entry[i].vector, dev);
dev->intr.enabled[i] = 0;
}
}
} else if (dev->intr.type == PVRDMA_INTR_TYPE_INTX ||
dev->intr.type == PVRDMA_INTR_TYPE_MSI) {
free_irq(dev->pdev->irq, dev);
}
for (i = 0; i < dev->nr_vectors; i++)
free_irq(pci_irq_vector(dev->pdev, i), dev);
}
static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
@ -528,126 +510,48 @@ static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
}
static int pvrdma_enable_msix(struct pci_dev *pdev, struct pvrdma_dev *dev)
{
int i;
int ret;
for (i = 0; i < PVRDMA_MAX_INTERRUPTS; i++) {
dev->intr.msix_entry[i].entry = i;
dev->intr.msix_entry[i].vector = i;
switch (i) {
case 0:
/* CMD ring handler */
dev->intr.handler[i] = pvrdma_intr0_handler;
break;
case 1:
/* Async event ring handler */
dev->intr.handler[i] = pvrdma_intr1_handler;
break;
default:
/* Completion queue handler */
dev->intr.handler[i] = pvrdma_intrx_handler;
break;
}
}
ret = pci_enable_msix(pdev, dev->intr.msix_entry,
PVRDMA_MAX_INTERRUPTS);
if (!ret) {
dev->intr.type = PVRDMA_INTR_TYPE_MSIX;
dev->intr.size = PVRDMA_MAX_INTERRUPTS;
} else if (ret > 0) {
ret = pci_enable_msix(pdev, dev->intr.msix_entry, ret);
if (!ret) {
dev->intr.type = PVRDMA_INTR_TYPE_MSIX;
dev->intr.size = ret;
} else {
dev->intr.size = 0;
}
}
dev_dbg(&pdev->dev, "using interrupt type %d, size %d\n",
dev->intr.type, dev->intr.size);
return ret;
}
static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
{
int ret = 0;
int i;
struct pci_dev *pdev = dev->pdev;
int ret = 0, i;
if (pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX) &&
pvrdma_enable_msix(dev->pdev, dev)) {
/* Try MSI */
ret = pci_enable_msi(dev->pdev);
if (!ret) {
dev->intr.type = PVRDMA_INTR_TYPE_MSI;
} else {
/* Legacy INTR */
dev->intr.type = PVRDMA_INTR_TYPE_INTX;
}
ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
PCI_IRQ_MSIX);
if (ret < 0) {
ret = pci_alloc_irq_vectors(pdev, 1, 1,
PCI_IRQ_MSI | PCI_IRQ_LEGACY);
if (ret < 0)
return ret;
}
dev->nr_vectors = ret;
ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
if (ret) {
dev_err(&dev->pdev->dev,
"failed to request interrupt 0\n");
goto out_free_vectors;
}
/* Request First IRQ */
switch (dev->intr.type) {
case PVRDMA_INTR_TYPE_INTX:
case PVRDMA_INTR_TYPE_MSI:
ret = request_irq(dev->pdev->irq, pvrdma_intr0_handler,
IRQF_SHARED, DRV_NAME, dev);
for (i = 1; i < dev->nr_vectors; i++) {
ret = request_irq(pci_irq_vector(dev->pdev, i),
i == 1 ? pvrdma_intr1_handler :
pvrdma_intrx_handler,
0, DRV_NAME, dev);
if (ret) {
dev_err(&dev->pdev->dev,
"failed to request interrupt\n");
goto disable_msi;
}
break;
case PVRDMA_INTR_TYPE_MSIX:
ret = request_irq(dev->intr.msix_entry[0].vector,
pvrdma_intr0_handler, 0, DRV_NAME, dev);
if (ret) {
dev_err(&dev->pdev->dev,
"failed to request interrupt 0\n");
goto disable_msi;
}
dev->intr.enabled[0] = 1;
break;
default:
/* Not reached */
break;
}
/* For MSIX: request intr for each vector */
if (dev->intr.size > 1) {
ret = request_irq(dev->intr.msix_entry[1].vector,
pvrdma_intr1_handler, 0, DRV_NAME, dev);
if (ret) {
dev_err(&dev->pdev->dev,
"failed to request interrupt 1\n");
goto free_irq;
}
dev->intr.enabled[1] = 1;
for (i = 2; i < dev->intr.size; i++) {
ret = request_irq(dev->intr.msix_entry[i].vector,
pvrdma_intrx_handler, 0,
DRV_NAME, dev);
if (ret) {
dev_err(&dev->pdev->dev,
"failed to request interrupt %d\n", i);
goto free_irq;
}
dev->intr.enabled[i] = 1;
"failed to request interrupt %d\n", i);
goto free_irqs;
}
}
return 0;
free_irq:
pvrdma_free_irq(dev);
disable_msi:
pvrdma_disable_msi_all(dev);
free_irqs:
while (--i >= 0)
free_irq(pci_irq_vector(dev->pdev, i), dev);
out_free_vectors:
pci_free_irq_vectors(pdev);
return ret;
}
@ -1091,7 +995,7 @@ static int pvrdma_pci_probe(struct pci_dev *pdev,
pvrdma_uar_table_cleanup(dev);
err_free_intrs:
pvrdma_free_irq(dev);
pvrdma_disable_msi_all(dev);
pci_free_irq_vectors(pdev);
err_free_cq_ring:
pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
err_free_async_ring:
@ -1141,7 +1045,7 @@ static void pvrdma_pci_remove(struct pci_dev *pdev)
pvrdma_disable_intrs(dev);
pvrdma_free_irq(dev);
pvrdma_disable_msi_all(dev);
pci_free_irq_vectors(pdev);
/* Deactivate pvrdma device */
pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);