drm/amdgpu: remove pointless ttm_eu usage from vkms

We just need to reserve one BO here, no need for using ttm_eu to reserve
multiple BOs.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220419141915.122157-1-christian.koenig@amd.com

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
index 5224d9a..576849e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
@@ -302,9 +302,6 @@ static int amdgpu_vkms_prepare_fb(struct drm_plane *plane,
        struct drm_gem_object *obj;
        struct amdgpu_device *adev;
        struct amdgpu_bo *rbo;
-       struct list_head list;
-       struct ttm_validate_buffer tv;
-       struct ww_acquire_ctx ticket;
        uint32_t domain;
        int r;
 
@@ -316,18 +313,19 @@ static int amdgpu_vkms_prepare_fb(struct drm_plane *plane,
        obj = new_state->fb->obj[0];
        rbo = gem_to_amdgpu_bo(obj);
        adev = amdgpu_ttm_adev(rbo->tbo.bdev);
-       INIT_LIST_HEAD(&list);
 
-       tv.bo = &rbo->tbo;
-       tv.num_shared = 1;
-       list_add(&tv.head, &list);
-
-       r = ttm_eu_reserve_buffers(&ticket, &list, false, NULL);
+       r = amdgpu_bo_reserve(rbo, true);
        if (r) {
                dev_err(adev->dev, "fail to reserve bo (%d)\n", r);
                return r;
        }
 
+       r = dma_resv_reserve_fences(rbo->tbo.base.resv, 1);
+       if (r) {
+               dev_err(adev->dev, "allocating fence slot failed (%d)\n", r);
+               goto error_unlock;
+       }
+
        if (plane->type != DRM_PLANE_TYPE_CURSOR)
                domain = amdgpu_display_supported_domains(adev, rbo->flags);
        else
@@ -337,25 +335,29 @@ static int amdgpu_vkms_prepare_fb(struct drm_plane *plane,
        if (unlikely(r != 0)) {
                if (r != -ERESTARTSYS)
                        DRM_ERROR("Failed to pin framebuffer with error %d\n", r);
-               ttm_eu_backoff_reservation(&ticket, &list);
-               return r;
+               goto error_unlock;
        }
 
        r = amdgpu_ttm_alloc_gart(&rbo->tbo);
        if (unlikely(r != 0)) {
-               amdgpu_bo_unpin(rbo);
-               ttm_eu_backoff_reservation(&ticket, &list);
                DRM_ERROR("%p bind failed\n", rbo);
-               return r;
+               goto error_unpin;
        }
 
-       ttm_eu_backoff_reservation(&ticket, &list);
+       amdgpu_bo_unreserve(rbo);
 
        afb->address = amdgpu_bo_gpu_offset(rbo);
 
        amdgpu_bo_ref(rbo);
 
        return 0;
+
+error_unpin:
+       amdgpu_bo_unpin(rbo);
+
+error_unlock:
+       amdgpu_bo_unreserve(rbo);
+       return r;
 }
 
 static void amdgpu_vkms_cleanup_fb(struct drm_plane *plane,