int xe_irq_install(struct xe_device *xe)
{
struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
+ unsigned int irq_flags = PCI_IRQ_MSIX;
irq_handler_t irq_handler;
- int err, irq;
+ int err, irq, nvec;
irq_handler = xe_irq_handler(xe);
if (!irq_handler) {
xe_irq_reset(xe);
- err = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI | PCI_IRQ_MSIX);
+ nvec = pci_msix_vec_count(pdev);
+ if (nvec <= 0) {
+ if (nvec == -EINVAL) {
+ /* MSIX capability is not supported in the device, using MSI */
+ irq_flags = PCI_IRQ_MSI;
+ nvec = 1;
+ } else {
+ drm_err(&xe->drm, "MSIX: Failed getting count\n");
+ return nvec;
+ }
+ }
+
+ err = pci_alloc_irq_vectors(pdev, nvec, nvec, irq_flags);
if (err < 0) {
drm_err(&xe->drm, "MSI/MSIX: Failed to enable support %d\n", err);
return err;