For gpu vf device, first need to request full gpu access before
accessing gpu registers, and release full gpu access after the
access is done.
Signed-off-by: Xiangliang Yu <Xiangliang.Yu at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 9 +++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 9a2fd3e..03d28a1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1330,6 +1330,12 @@ static int amdgpu_early_init(struct amdgpu_device *adev)
return -EINVAL;
}
+ if (amdgpu_sriov_vf(adev)) {
+ r = amdgpu_virt_request_full_gpu(adev, true);
+ if (r)
+ return r;
+ }
+
for (i = 0; i < adev->num_ip_blocks; i++) {
if ((amdgpu_ip_block_mask & (1 << i)) == 0) {
DRM_ERROR("disabled ip block: %d\n", i);
@@ -1523,6 +1529,9 @@ static int amdgpu_fini(struct amdgpu_device *adev)
adev->ip_blocks[i].status.late_initialized = false;
}
+ if (amdgpu_sriov_vf(adev))
+ amdgpu_virt_release_full_gpu(adev, false);
+
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 47bc8e1..eb228c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -60,6 +60,9 @@ int amdgpu_driver_unload_kms(struct drm_device *dev)
if (adev->rmmio == NULL)
goto done_free;
+ if (amdgpu_sriov_vf(adev))
+ amdgpu_virt_request_full_gpu(adev, false);
+
if (amdgpu_device_is_px(dev)) {
pm_runtime_get_sync(dev->dev);
pm_runtime_forbid(dev->dev);
@@ -139,6 +142,9 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
pm_runtime_put_autosuspend(dev->dev);
}
+ if (amdgpu_sriov_vf(adev))
+ amdgpu_virt_release_full_gpu(adev, true);
+
out:
if (r) {
/* balance pm_runtime_get_sync in amdgpu_driver_unload_kms */
--
2.7.4
