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drm/amdgpu: Restore msix after FLR 

After FLR, the msix will be cleared, so need to re-enable it.

Signed-off-by: Peng Ju Zhou <PengJu.Zhou@amd.com>
Signed-off-by: Emily.Deng <Emily.Deng@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Emily.Deng 2020-10-01 12:41:50 +08:00 committed by Alex Deucher
parent 468f04cfbb
commit 3c727c1c45
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
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@ -278,6 +278,21 @@ static bool amdgpu_msi_ok(struct amdgpu_device *adev)
return true; return true;
} }
static void amdgpu_restore_msix(struct amdgpu_device *adev)
{
u16 ctrl;
pci_read_config_word(adev->pdev, adev->pdev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
if (!(ctrl & PCI_MSIX_FLAGS_ENABLE))
return;
/* VF FLR */
ctrl &= ~PCI_MSIX_FLAGS_ENABLE;
pci_write_config_word(adev->pdev, adev->pdev->msix_cap + PCI_MSIX_FLAGS, ctrl);
ctrl |= PCI_MSIX_FLAGS_ENABLE;
pci_write_config_word(adev->pdev, adev->pdev->msix_cap + PCI_MSIX_FLAGS, ctrl);
}
/** /**
* amdgpu_irq_init - initialize interrupt handling * amdgpu_irq_init - initialize interrupt handling
* *
@ -569,6 +584,9 @@ void amdgpu_irq_gpu_reset_resume_helper(struct amdgpu_device *adev)
{ {
int i, j, k; int i, j, k;
if (amdgpu_sriov_vf(adev))
amdgpu_restore_msix(adev);
for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) { for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) {
if (!adev->irq.client[i].sources) if (!adev->irq.client[i].sources)
continue; continue;