drm/amdgpu/vcn: add test for dec software ring

Add vcn software ring decode ring test and decode ib test.
Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c

@@ -456,6 +456,37 @@ int amdgpu_vcn_dec_ring_test_ring(struct amdgpu_ring *ring)
 	return r;
 }
 
+int amdgpu_vcn_dec_sw_ring_test_ring(struct amdgpu_ring *ring)
+{
+	struct amdgpu_device *adev = ring->adev;
+	uint32_t rptr;
+	unsigned int i;
+	int r;
+
+	if (amdgpu_sriov_vf(adev))
+		return 0;
+
+	r = amdgpu_ring_alloc(ring, 16);
+	if (r)
+		return r;
+
+	rptr = amdgpu_ring_get_rptr(ring);
+
+	amdgpu_ring_write(ring, VCN_DEC_SW_CMD_END);
+	amdgpu_ring_commit(ring);
+
+	for (i = 0; i < adev->usec_timeout; i++) {
+		if (amdgpu_ring_get_rptr(ring) != rptr)
+			break;
+		udelay(1);
+	}
+
+	if (i >= adev->usec_timeout)
+		r = -ETIMEDOUT;
+
+	return r;
+}
+
 static int amdgpu_vcn_dec_send_msg(struct amdgpu_ring *ring,
 				   struct amdgpu_bo *bo,
 				   struct dma_fence **fence)
@@ -601,6 +632,96 @@ int amdgpu_vcn_dec_ring_test_ib(struct amdgpu_ring *ring, long timeout)
 	return r;
 }
 
+static int amdgpu_vcn_dec_sw_send_msg(struct amdgpu_ring *ring,
+				   struct amdgpu_bo *bo,
+				   struct dma_fence **fence)
+{
+	struct amdgpu_vcn_decode_buffer *decode_buffer = NULL;
+	const unsigned int ib_size_dw = 64;
+	struct amdgpu_device *adev = ring->adev;
+	struct dma_fence *f = NULL;
+	struct amdgpu_job *job;
+	struct amdgpu_ib *ib;
+	uint64_t addr;
+	int i, r;
+
+	r = amdgpu_job_alloc_with_ib(adev, ib_size_dw * 4,
+				AMDGPU_IB_POOL_DIRECT, &job);
+	if (r)
+		goto err;
+
+	ib = &job->ibs[0];
+	addr = amdgpu_bo_gpu_offset(bo);
+	ib->length_dw = 0;
+
+	ib->ptr[ib->length_dw++] = sizeof(struct amdgpu_vcn_decode_buffer) + 8;
+	ib->ptr[ib->length_dw++] = cpu_to_le32(AMDGPU_VCN_IB_FLAG_DECODE_BUFFER);
+	decode_buffer = (struct amdgpu_vcn_decode_buffer *)&(ib->ptr[ib->length_dw]);
+	ib->length_dw += sizeof(struct amdgpu_vcn_decode_buffer) / 4;
+	memset(decode_buffer, 0, sizeof(struct amdgpu_vcn_decode_buffer));
+
+	decode_buffer->valid_buf_flag |= cpu_to_le32(AMDGPU_VCN_CMD_FLAG_MSG_BUFFER);
+	decode_buffer->msg_buffer_address_hi = cpu_to_le32(addr >> 32);
+	decode_buffer->msg_buffer_address_lo = cpu_to_le32(addr);
+
+	for (i = ib->length_dw; i < ib_size_dw; ++i)
+		ib->ptr[i] = 0x0;
+
+	r = amdgpu_job_submit_direct(job, ring, &f);
+	if (r)
+		goto err_free;
+
+	amdgpu_bo_fence(bo, f, false);
+	amdgpu_bo_unreserve(bo);
+	amdgpu_bo_unref(&bo);
+
+	if (fence)
+		*fence = dma_fence_get(f);
+	dma_fence_put(f);
+
+	return 0;
+
+err_free:
+	amdgpu_job_free(job);
+
+err:
+	amdgpu_bo_unreserve(bo);
+	amdgpu_bo_unref(&bo);
+	return r;
+}
+
+int amdgpu_vcn_dec_sw_ring_test_ib(struct amdgpu_ring *ring, long timeout)
+{
+	struct dma_fence *fence = NULL;
+	struct amdgpu_bo *bo;
+	long r;
+
+	r = amdgpu_vcn_dec_get_create_msg(ring, 1, &bo);
+	if (r)
+		goto error;
+
+	r = amdgpu_vcn_dec_sw_send_msg(ring, bo, NULL);
+	if (r)
+		goto error;
+	r = amdgpu_vcn_dec_get_destroy_msg(ring, 1, &bo);
+	if (r)
+		goto error;
+
+	r = amdgpu_vcn_dec_sw_send_msg(ring, bo, &fence);
+	if (r)
+		goto error;
+
+	r = dma_fence_wait_timeout(fence, false, timeout);
+	if (r == 0)
+		r = -ETIMEDOUT;
+	else if (r > 0)
+		r = 0;
+
+	dma_fence_put(fence);
+error:
+	return r;
+}
+
 int amdgpu_vcn_enc_ring_test_ring(struct amdgpu_ring *ring)
 {
 	struct amdgpu_device *adev = ring->adev;