[PATCH v3 2/3] drm/amdgpu: VCE avoid memory allocation during IB test

[xinhui pan <xinhui.pan@amd.com>]

alloc extra msg from direct IB pool.

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
---
change from v1:
let addr align up to gpu page boundary.
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 27 ++++++++++++-------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
index e9fdf49d69e8..caa4d3420e00 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
@@ -82,7 +82,6 @@ MODULE_FIRMWARE(FIRMWARE_VEGA20);
 
 static void amdgpu_vce_idle_work_handler(struct work_struct *work);
 static int amdgpu_vce_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
-				     struct amdgpu_bo *bo,
 				     struct dma_fence **fence);
 static int amdgpu_vce_get_destroy_msg(struct amdgpu_ring *ring, uint32_t handle,
 				      bool direct, struct dma_fence **fence);
@@ -441,12 +440,12 @@ void amdgpu_vce_free_handles(struct amdgpu_device *adev, struct drm_file *filp)
  * Open up a stream for HW test
  */
 static int amdgpu_vce_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
-				     struct amdgpu_bo *bo,
 				     struct dma_fence **fence)
 {
 	const unsigned ib_size_dw = 1024;
 	struct amdgpu_job *job;
 	struct amdgpu_ib *ib;
+	struct amdgpu_ib ib_msg;
 	struct dma_fence *f = NULL;
 	uint64_t addr;
 	int i, r;
@@ -456,9 +455,17 @@ static int amdgpu_vce_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
 	if (r)
 		return r;
 
-	ib = &job->ibs[0];
+	memset(&ib_msg, 0, sizeof(ib_msg));
+	/* only one gpu page is needed, alloc +1 page to make addr aligned. */
+	r = amdgpu_ib_get(ring->adev, NULL, AMDGPU_GPU_PAGE_SIZE * 2,
+			  AMDGPU_IB_POOL_DIRECT,
+			  &ib_msg);
+	if (r)
+		goto err;
 
-	addr = amdgpu_bo_gpu_offset(bo);
+	ib = &job->ibs[0];
+	/* let addr point to page boundary */
+	addr = AMDGPU_GPU_PAGE_ALIGN(ib_msg.gpu_addr);
 
 	/* stitch together an VCE create msg */
 	ib->length_dw = 0;
@@ -498,6 +505,7 @@ static int amdgpu_vce_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
 		ib->ptr[i] = 0x0;
 
 	r = amdgpu_job_submit_direct(job, ring, &f);
+	amdgpu_ib_free(ring->adev, &ib_msg, f);
 	if (r)
 		goto err;
 
@@ -1134,20 +1142,13 @@ int amdgpu_vce_ring_test_ring(struct amdgpu_ring *ring)
 int amdgpu_vce_ring_test_ib(struct amdgpu_ring *ring, long timeout)
 {
 	struct dma_fence *fence = NULL;
-	struct amdgpu_bo *bo = NULL;
 	long r;
 
 	/* skip vce ring1/2 ib test for now, since it's not reliable */
 	if (ring != &ring->adev->vce.ring[0])
 		return 0;
 
-	r = amdgpu_bo_create_reserved(ring->adev, 512, PAGE_SIZE,
-				      AMDGPU_GEM_DOMAIN_VRAM,
-				      &bo, NULL, NULL);
-	if (r)
-		return r;
-
-	r = amdgpu_vce_get_create_msg(ring, 1, bo, NULL);
+	r = amdgpu_vce_get_create_msg(ring, 1, NULL);
 	if (r)
 		goto error;
 
@@ -1163,8 +1164,6 @@ int amdgpu_vce_ring_test_ib(struct amdgpu_ring *ring, long timeout)
 
 error:
 	dma_fence_put(fence);
-	amdgpu_bo_unreserve(bo);
-	amdgpu_bo_free_kernel(&bo, NULL, NULL);
 	return r;
 }
 
-- 
2.25.1