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| author | Luben Tuikov <luben.tuikov@amd.com> | 2022-07-20 15:04:18 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-07-20 16:03:41 -0400 |
| commit | 5df79aeb6e0890d6f5fd6e12c7ad238a1617b210 (patch) | |
| tree | 3b539cca9656dc74c0305863aa4c9ee1a3920faa /drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | |
| parent | 4528c18605654bea022d294c9ba2e93600d05a94 (diff) | |
| download | linux-5df79aeb6e0890d6f5fd6e12c7ad238a1617b210.tar.bz2 | |
drm/amdgpu: Protect the amdgpu_bo_list list with a mutex v2
Protect the struct amdgpu_bo_list with a mutex. This is used during command
submission in order to avoid buffer object corruption as recorded in
the link below.
v2 (chk): Keep the mutex looked for the whole CS to avoid using the
list from multiple CS threads at the same time.
Suggested-by: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Vitaly Prosyak <Vitaly.Prosyak@amd.com>
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2048
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Tested-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index b28af04b0c3e..d8f1335bc68f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -519,6 +519,8 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p, return r; } + mutex_lock(&p->bo_list->bo_list_mutex); + /* One for TTM and one for the CS job */ amdgpu_bo_list_for_each_entry(e, p->bo_list) e->tv.num_shared = 2; @@ -651,6 +653,7 @@ out_free_user_pages: kvfree(e->user_pages); e->user_pages = NULL; } + mutex_unlock(&p->bo_list->bo_list_mutex); } return r; } @@ -690,9 +693,11 @@ static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error, { unsigned i; - if (error && backoff) + if (error && backoff) { ttm_eu_backoff_reservation(&parser->ticket, &parser->validated); + mutex_unlock(&parser->bo_list->bo_list_mutex); + } for (i = 0; i < parser->num_post_deps; i++) { drm_syncobj_put(parser->post_deps[i].syncobj); @@ -832,12 +837,16 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p) continue; r = amdgpu_vm_bo_update(adev, bo_va, false); - if (r) + if (r) { + mutex_unlock(&p->bo_list->bo_list_mutex); return r; + } r = amdgpu_sync_fence(&p->job->sync, bo_va->last_pt_update); - if (r) + if (r) { + mutex_unlock(&p->bo_list->bo_list_mutex); return r; + } } r = amdgpu_vm_handle_moved(adev, vm); @@ -1278,6 +1287,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p, ttm_eu_fence_buffer_objects(&p->ticket, &p->validated, p->fence); mutex_unlock(&p->adev->notifier_lock); + mutex_unlock(&p->bo_list->bo_list_mutex); return 0; |