[V2 07/11] drm/amdgpu: request/release full gpu access if device is vf

[Xiangliang Yu]

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...@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

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