drm/amd/amdgpu: fix UVD mc offsets

When UVD bo is created, its size is based on the information from firmware
header (ucode_size_bytes). The same value should be be used when programming
UVD mc controller offsets, otherwise it can happen that
(mmUVD_VCPU_CACHE_OFFSET2 + mmUVD_VCPU_CACHE_SIZE2) will point
AMDGPU_GPU_PAGE_SIZE bytes after the UVD bo end.

Second issue is that when programming the mmUVD_VCPU_CACHE_SIZE0 register,
AMDGPU_UVD_FIRMWARE_OFFSET should be taken into account. If it isn't,
(mmUVD_VCPU_CACHE_OFFSET2 + mmUVD_VCPU_CACHE_SIZE2) will always point
AMDGPU_UVD_FIRMWARE_OFFSET bytes after the UVD bo end.

v2: move firmware size calculation into macro definition
v3: align firmware size to the gpu page size
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Piotr Redlewski <predlewski@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.h

@@ -31,6 +31,10 @@
 #define AMDGPU_UVD_SESSION_SIZE		(50*1024)
 #define AMDGPU_UVD_FIRMWARE_OFFSET	256
 
+#define AMDGPU_UVD_FIRMWARE_SIZE(adev)    \
+	(AMDGPU_GPU_PAGE_ALIGN(le32_to_cpu(((const struct common_firmware_header *)(adev)->uvd.fw->data)->ucode_size_bytes) + \
+			       8) - AMDGPU_UVD_FIRMWARE_OFFSET)
+
 struct amdgpu_uvd {
 	struct amdgpu_bo	*vcpu_bo;
 	void			*cpu_addr;

drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c

@@ -563,7 +563,7 @@ static void uvd_v4_2_mc_resume(struct amdgpu_device *adev)
 
 	/* programm the VCPU memory controller bits 0-27 */
 	addr = (adev->uvd.gpu_addr + AMDGPU_UVD_FIRMWARE_OFFSET) >> 3;
-	size = AMDGPU_GPU_PAGE_ALIGN(adev->uvd.fw->size + 4) >> 3;
+	size = AMDGPU_UVD_FIRMWARE_SIZE(adev) >> 3;
 	WREG32(mmUVD_VCPU_CACHE_OFFSET0, addr);
 	WREG32(mmUVD_VCPU_CACHE_SIZE0, size);
 

drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c

@@ -258,7 +258,7 @@ static void uvd_v5_0_mc_resume(struct amdgpu_device *adev)
 			upper_32_bits(adev->uvd.gpu_addr));
 
 	offset = AMDGPU_UVD_FIRMWARE_OFFSET;
-	size = AMDGPU_GPU_PAGE_ALIGN(adev->uvd.fw->size + 4);
+	size = AMDGPU_UVD_FIRMWARE_SIZE(adev);
 	WREG32(mmUVD_VCPU_CACHE_OFFSET0, offset >> 3);
 	WREG32(mmUVD_VCPU_CACHE_SIZE0, size);
 

drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c

@@ -603,7 +603,7 @@ static void uvd_v6_0_mc_resume(struct amdgpu_device *adev)
 			upper_32_bits(adev->uvd.gpu_addr));
 
 	offset = AMDGPU_UVD_FIRMWARE_OFFSET;
-	size = AMDGPU_GPU_PAGE_ALIGN(adev->uvd.fw->size + 4);
+	size = AMDGPU_UVD_FIRMWARE_SIZE(adev);
 	WREG32(mmUVD_VCPU_CACHE_OFFSET0, offset >> 3);
 	WREG32(mmUVD_VCPU_CACHE_SIZE0, size);
 

drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c

@@ -616,7 +616,7 @@ static int uvd_v7_0_resume(void *handle)
  */
 static void uvd_v7_0_mc_resume(struct amdgpu_device *adev)
 {
-	uint32_t size = AMDGPU_GPU_PAGE_ALIGN(adev->uvd.fw->size + 4);
+	uint32_t size = AMDGPU_UVD_FIRMWARE_SIZE(adev);
 	uint32_t offset;
 
 	if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {