drm/amdgpu : enable msix for amdgpu driver

We might used out of the msi resources in some cloud project
which have a lot gpu devices(including PF and VF), msix can
provide enough resources from system level view

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index d1d5e7f9b9be32ab2fb82c3f102053218ddb4ca9..50771b2757dc8a036915e9b232ce544d759385b0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -245,8 +245,9 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
        adev->irq.msi_enabled = false;
 
        if (amdgpu_msi_ok(adev)) {
-               int ret = pci_enable_msi(adev->pdev);
-               if (!ret) {
+               int nvec = pci_alloc_irq_vectors(adev->pdev, 1, pci_msix_vec_count(adev->pdev),
+                                       PCI_IRQ_MSI | PCI_IRQ_MSIX);
+               if (nvec > 0) {
                        adev->irq.msi_enabled = true;
                        dev_dbg(adev->dev, "amdgpu: using MSI.\n");
                }