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authorChristoph Hellwig <hch@lst.de>2016-11-18 09:28:16 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-01-10 07:47:00 +0300
commiteab5c1503b604216e352151618cd78d5806dee1a (patch)
treee95d688d36301cba0d4de459574cb1ac73ebb9d4 /drivers/scsi/pmcraid.c
parent984dc46c5715fec4329861f93f30c76b8d680e8d (diff)
downloadlinux-eab5c1503b604216e352151618cd78d5806dee1a.tar.xz
scsi: pmcraid: switch to pci_alloc_irq_vectors
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/pmcraid.c')
-rw-r--r--drivers/scsi/pmcraid.c92
1 files changed, 41 insertions, 51 deletions
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 337982cf3d63..49e70a383afa 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -4587,16 +4587,14 @@ static void pmcraid_tasklet_function(unsigned long instance)
static
void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
{
+ struct pci_dev *pdev = pinstance->pdev;
int i;
for (i = 0; i < pinstance->num_hrrq; i++)
- free_irq(pinstance->hrrq_vector[i].vector,
- &(pinstance->hrrq_vector[i]));
+ free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
- if (pinstance->interrupt_mode) {
- pci_disable_msix(pinstance->pdev);
- pinstance->interrupt_mode = 0;
- }
+ pinstance->interrupt_mode = 0;
+ pci_free_irq_vectors(pdev);
}
/**
@@ -4609,60 +4607,52 @@ void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
static int
pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
{
- int rc;
struct pci_dev *pdev = pinstance->pdev;
+ unsigned int irq_flag = PCI_IRQ_LEGACY, flag;
+ int num_hrrq, rc, i;
+ irq_handler_t isr;
- if ((pmcraid_enable_msix) &&
- (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
- int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
- struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
- int i;
- for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
- entries[i].entry = i;
-
- num_hrrq = pci_enable_msix_range(pdev, entries, 1, num_hrrq);
- if (num_hrrq < 0)
- goto pmcraid_isr_legacy;
-
- for (i = 0; i < num_hrrq; i++) {
- pinstance->hrrq_vector[i].hrrq_id = i;
- pinstance->hrrq_vector[i].drv_inst = pinstance;
- pinstance->hrrq_vector[i].vector = entries[i].vector;
- rc = request_irq(pinstance->hrrq_vector[i].vector,
- pmcraid_isr_msix, 0,
- PMCRAID_DRIVER_NAME,
- &(pinstance->hrrq_vector[i]));
-
- if (rc) {
- int j;
- for (j = 0; j < i; j++)
- free_irq(entries[j].vector,
- &(pinstance->hrrq_vector[j]));
- pci_disable_msix(pdev);
- goto pmcraid_isr_legacy;
- }
- }
+ if (pmcraid_enable_msix)
+ irq_flag |= PCI_IRQ_MSIX;
- pinstance->num_hrrq = num_hrrq;
+ num_hrrq = pci_alloc_irq_vectors(pdev, 1, PMCRAID_NUM_MSIX_VECTORS,
+ irq_flag);
+ if (num_hrrq < 0)
+ return num_hrrq;
+
+ if (pdev->msix_enabled) {
+ flag = 0;
+ isr = pmcraid_isr_msix;
+ } else {
+ flag = IRQF_SHARED;
+ isr = pmcraid_isr;
+ }
+
+ for (i = 0; i < num_hrrq; i++) {
+ struct pmcraid_isr_param *vec = &pinstance->hrrq_vector[i];
+
+ vec->hrrq_id = i;
+ vec->drv_inst = pinstance;
+ rc = request_irq(pci_irq_vector(pdev, i), isr, flag,
+ PMCRAID_DRIVER_NAME, vec);
+ if (rc)
+ goto out_unwind;
+ }
+
+ pinstance->num_hrrq = num_hrrq;
+ if (pdev->msix_enabled) {
pinstance->interrupt_mode = 1;
iowrite32(DOORBELL_INTR_MODE_MSIX,
pinstance->int_regs.host_ioa_interrupt_reg);
ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
- goto pmcraid_isr_out;
}
-pmcraid_isr_legacy:
- /* If MSI-X registration failed fallback to legacy mode, where
- * only one hrrq entry will be used
- */
- pinstance->hrrq_vector[0].hrrq_id = 0;
- pinstance->hrrq_vector[0].drv_inst = pinstance;
- pinstance->hrrq_vector[0].vector = pdev->irq;
- pinstance->num_hrrq = 1;
-
- rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
- PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
-pmcraid_isr_out:
+ return 0;
+
+out_unwind:
+ while (--i > 0)
+ free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
+ pci_free_irq_vectors(pdev);
return rc;
}