[PATCH] drm/amdgpu: Toggle msix after FLR for sriov

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: "Emily.Deng" <Emily.Deng@xxxxxxx>

After FLR, the msix will be cleared, so need to toggle it for sriov.

v2:
Change name with amdgpu_irq prefix, remove #ifdef.

Signed-off-by: Emily.Deng <Emily.Deng@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 03412543427a..3045f52e613d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -277,6 +277,17 @@ static bool amdgpu_msi_ok(struct amdgpu_device *adev)
 	return true;
 }
 
+static void amdgpu_irq_restore_msix(struct amdgpu_device *adev)
+{
+	u16 ctrl;
+
+	pci_read_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);
+	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
  *
@@ -558,6 +569,9 @@ void amdgpu_irq_gpu_reset_resume_helper(struct amdgpu_device *adev)
 {
 	int i, j, k;
 
+	if (amdgpu_sriov_vf(adev))
+		amdgpu_irq_restore_msix(adev);
+
 	for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) {
 		if (!adev->irq.client[i].sources)
 			continue;
-- 
2.25.1

_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/amd-gfx



[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux