From: Nick Cheng <nick.ch...@areca.com.tw>
Support MSI or MSI-X for whole series of RAID controllers. Meanwhile correct
the register access as iowrite32/ioread32
Signed-off-by: Nick Cheng <nick.ch...@areca.com.tw>
---
diff -uprN a//drivers/scsi/arcmsr/arcmsr_hba.c
b//drivers/scsi/arcmsr/arcmsr_hba.c
--- a//drivers/scsi/arcmsr/arcmsr_hba.c 2012-10-12 16:34:58.219955247 +0800
+++ b//drivers/scsi/arcmsr/arcmsr_hba.c 2012-10-12 16:35:16.267955072 +0800
@@ -805,8 +805,9 @@ static int arcmsr_probe(struct pci_dev *
{
struct Scsi_Host *host;
struct AdapterControlBlock *acb;
- uint8_t bus,dev_fun;
- int error;
+ uint8_t bus, dev_fun;
+ struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
+ int error, i, j;
error = pci_enable_device(pdev);
if (error) {
return -ENODEV;
@@ -871,10 +872,46 @@ static int arcmsr_probe(struct pci_dev *
if (error) {
goto RAID_controller_stop;
}
- error = request_irq(pdev->irq, arcmsr_do_interrupt,
- IRQF_SHARED, "arcmsr", acb);
- if (error) {
- goto scsi_host_remove;
+ if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
+ if (!pci_enable_msix(pdev, entries, ARCMST_NUM_MSIX_VECTORS)) {
+ for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++) {
+ entries[i].entry = i;
+ if (request_irq(entries[i].vector,
+ arcmsr_do_interrupt, 0, "arcmsr",
+ acb)) {
+ for (j = 0 ; j < i ; j++)
+ free_irq(entries[i].vector,
+ acb);
+ goto scsi_host_remove;
+ }
+ acb->entries[i] = entries[i];
+ }
+ acb->acb_flags |= ACB_F_MSIX_ENABLED;
+ } else {
+ if (request_irq(pdev->irq, arcmsr_do_interrupt,
+ IRQF_SHARED, "arcmsr", acb)) {
+ printk("arcmsr%d: request_irq =%d failed!\n",
+ acb->host->host_no, pdev->irq);
+ goto scsi_host_remove;
+ }
+ }
+ } else if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
+ if (!pci_enable_msi(pdev)) {
+ acb->acb_flags |= ACB_F_MSI_ENABLED;
+ }
+ if (request_irq(pdev->irq, arcmsr_do_interrupt,
+ IRQF_SHARED, "arcmsr", acb)) {
+ printk("arcmsr%d: request_irq =%d failed!\n",
+ acb->host->host_no, pdev->irq);
+ goto scsi_host_remove;
+ }
+ } else {
+ if (request_irq(pdev->irq, arcmsr_do_interrupt,
+ IRQF_SHARED, "arcmsr", acb)) {
+ printk("arcmsr%d: request_irq =%d failed!\n",
+ acb->host->host_no, pdev->irq);
+ goto scsi_host_remove;
+ }
}
host->irq = pdev->irq;
scsi_scan_host(host);
@@ -895,6 +932,11 @@ static int arcmsr_probe(struct pci_dev *
return 0;
out_free_sysfs:
scsi_host_remove:
+ if (acb->acb_flags & ACB_F_MSI_ENABLED) {
+ pci_disable_msi(pdev);
+ } else if (acb->acb_flags & ACB_F_MSIX_ENABLED) {
+ pci_disable_msix(pdev);
+ }
scsi_remove_host(host);
RAID_controller_stop:
arcmsr_stop_adapter_bgrb(acb);
--
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