drm/amdgpu:imple mqd soft ini/fini

this is for SRIOV fix:
mqd soft init/fini will be invoked by sw_init to
allocate BO for compute MQD resource, instead of
original scheme that hw_init allocates MQD.

because if hw_init allocates MQD, then resume will
allocate MQD, and that lead to memory leak after
driver recovered from hang.
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -659,6 +659,8 @@ static u32 gfx_v8_0_get_csb_size(struct amdgpu_device *adev);
 static void gfx_v8_0_get_cu_info(struct amdgpu_device *adev);
 static void gfx_v8_0_ring_emit_ce_meta_init(struct amdgpu_ring *ring, uint64_t addr);
 static void gfx_v8_0_ring_emit_de_meta_init(struct amdgpu_ring *ring, uint64_t addr);
+static int gfx_v8_0_compute_mqd_soft_init(struct amdgpu_device *adev);
+static void gfx_v8_0_compute_mqd_soft_fini(struct amdgpu_device *adev);
 
 static void gfx_v8_0_init_golden_registers(struct amdgpu_device *adev)
 {
@@ -7330,3 +7332,53 @@ static void gfx_v8_0_ring_emit_de_meta_init(struct amdgpu_ring *ring, uint64_t c
 	amdgpu_ring_write(ring, upper_32_bits(de_payload_addr));
 	amdgpu_ring_write_multiple(ring, (void *)&de_payload, cnt_de - 2);
 }
+
+/* create MQD for each compute queue */
+static int gfx_v8_0_compute_mqd_soft_init(struct amdgpu_device *adev)
+{
+	struct amdgpu_ring *ring = NULL;
+	int r, i;
+
+	/* create MQD for KIQ */
+	ring = &adev->gfx.kiq.ring;
+	if (!ring->mqd_obj) {
+		r = amdgpu_bo_create_kernel(adev, sizeof(struct vi_mqd), PAGE_SIZE,
+						AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
+						&ring->mqd_gpu_addr, (void **)&ring->mqd_ptr);
+		if (r) {
+			dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
+			return r;
+		}
+	}
+
+	/* create MQD for each KCQ */
+	for (i = 0; i < adev->gfx.num_compute_rings; i++)
+	{
+		ring = &adev->gfx.compute_ring[i];
+		if (!ring->mqd_obj) {
+			r = amdgpu_bo_create_kernel(adev, sizeof(struct vi_mqd), PAGE_SIZE,
+							AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
+							&ring->mqd_gpu_addr, (void **)&ring->mqd_ptr);
+			if (r) {
+				dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
+				return r;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static void gfx_v8_0_compute_mqd_soft_fini(struct amdgpu_device *adev)
+{
+	struct amdgpu_ring *ring = NULL;
+	int i;
+
+	for (i = 0; i < adev->gfx.num_compute_rings; i++) {
+		ring = &adev->gfx.compute_ring[i];
+		amdgpu_bo_free_kernel(&ring->mqd_obj, &ring->mqd_gpu_addr, (void **)&ring->mqd_ptr);
+	}
+
+	ring = &adev->gfx.kiq.ring;
+	amdgpu_bo_free_kernel(&ring->mqd_obj, &ring->mqd_gpu_addr, (void **)&ring->mqd_ptr);
+}
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