drm/amdgpu: print more accurate error messages on IB submission failure

It's useful for debugging.

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 0307ff5..8eb93df 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -386,8 +386,10 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 
                r = ttm_eu_reserve_buffers(&p->ticket, &p->validated, true,
                                           &duplicates);
-               if (unlikely(r != 0))
+               if (unlikely(r != 0)) {
+                       DRM_ERROR("ttm_eu_reserve_buffers failed.\n");
                        goto error_free_pages;
+               }
 
                /* Without a BO list we don't have userptr BOs */
                if (!p->bo_list)
@@ -427,9 +429,10 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
                /* Unreserve everything again. */
                ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 
-               /* We tried to often, just abort */
+               /* We tried too many times, just abort */
                if (!--tries) {
                        r = -EDEADLK;
+                       DRM_ERROR("deadlock in %s\n", __func__);
                        goto error_free_pages;
                }
 
@@ -441,11 +444,13 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
                                                         sizeof(struct page*));
                        if (!e->user_pages) {
                                r = -ENOMEM;
+                               DRM_ERROR("calloc failure in %s\n", __func__);
                                goto error_free_pages;
                        }
 
                        r = amdgpu_ttm_tt_get_user_pages(ttm, e->user_pages);
                        if (r) {
+                               DRM_ERROR("amdgpu_ttm_tt_get_user_pages failed.\n");
                                drm_free_large(e->user_pages);
                                e->user_pages = NULL;
                                goto error_free_pages;
@@ -462,12 +467,16 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
        p->bytes_moved = 0;
 
        r = amdgpu_cs_list_validate(p, &duplicates);
-       if (r)
+       if (r) {
+               DRM_ERROR("amdgpu_cs_list_validate(duplicates) failed.\n");
                goto error_validate;
+       }
 
        r = amdgpu_cs_list_validate(p, &p->validated);
-       if (r)
+       if (r) {
+               DRM_ERROR("amdgpu_cs_list_validate(validated) failed.\n");
                goto error_validate;
+       }
 
        fpriv->vm.last_eviction_counter =
                atomic64_read(&p->adev->num_evictions);