drm/radeon/kms/r6xx+: add query for tile config (v2)

Userspace needs this information to access tiled
buffers via the CPU.

v2: rebased on evergreen accel changes
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -1132,6 +1132,7 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
 								 rdev->config.evergreen.max_backends) &
 								EVERGREEN_MAX_BACKENDS_MASK));
 
+	rdev->config.evergreen.tile_config = gb_addr_config;
 	WREG32(GB_BACKEND_MAP, gb_backend_map);
 	WREG32(GB_ADDR_CONFIG, gb_addr_config);
 	WREG32(DMIF_ADDR_CONFIG, gb_addr_config);

drivers/gpu/drm/radeon/r600.c

@@ -1623,7 +1623,7 @@ void r600_gpu_init(struct radeon_device *rdev)
 							 r600_count_pipe_bits((cc_rb_backend_disable &
 									       R6XX_MAX_BACKENDS_MASK) >> 16)),
 							(cc_rb_backend_disable >> 16));
-
+	rdev->config.r600.tile_config = tiling_config;
 	tiling_config |= BACKEND_MAP(backend_map);
 	WREG32(GB_TILING_CONFIG, tiling_config);
 	WREG32(DCP_TILING_CONFIG, tiling_config & 0xffff);

drivers/gpu/drm/radeon/radeon.h

@@ -914,6 +914,7 @@ struct r600_asic {
 	unsigned		tiling_nbanks;
 	unsigned		tiling_npipes;
 	unsigned		tiling_group_size;
+	unsigned		tile_config;
 	struct r100_gpu_lockup	lockup;
 };
 
@@ -938,6 +939,7 @@ struct rv770_asic {
 	unsigned		tiling_nbanks;
 	unsigned		tiling_npipes;
 	unsigned		tiling_group_size;
+	unsigned		tile_config;
 	struct r100_gpu_lockup	lockup;
 };
 
@@ -963,6 +965,7 @@ struct evergreen_asic {
 	unsigned tiling_nbanks;
 	unsigned tiling_npipes;
 	unsigned tiling_group_size;
+	unsigned tile_config;
 };
 
 union radeon_asic_config {

drivers/gpu/drm/radeon/radeon_drv.c

@@ -46,9 +46,10 @@
  * - 2.3.0 - add MSPOS + 3D texture + r500 VAP regs
  * - 2.4.0 - add crtc id query
  * - 2.5.0 - add get accel 2 to work around ddx breakage for evergreen
+ * - 2.6.0 - add tiling config query (r6xx+)
  */
 #define KMS_DRIVER_MAJOR	2
-#define KMS_DRIVER_MINOR	5
+#define KMS_DRIVER_MINOR	6
 #define KMS_DRIVER_PATCHLEVEL	0
 int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
 int radeon_driver_unload_kms(struct drm_device *dev);

drivers/gpu/drm/radeon/radeon_kms.c

@@ -147,6 +147,18 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 	case RADEON_INFO_ACCEL_WORKING2:
 		value = rdev->accel_working;
 		break;
+	case RADEON_INFO_TILING_CONFIG:
+		if (rdev->family >= CHIP_CEDAR)
+			value = rdev->config.evergreen.tile_config;
+		else if (rdev->family >= CHIP_RV770)
+			value = rdev->config.rv770.tile_config;
+		else if (rdev->family >= CHIP_R600)
+			value = rdev->config.r600.tile_config;
+		else {
+			DRM_DEBUG("tiling config is r6xx+ only!\n");
+			return -EINVAL;
+		}
+		break;
 	default:
 		DRM_DEBUG("Invalid request %d\n", info->request);
 		return -EINVAL;

drivers/gpu/drm/radeon/rv770.c

@@ -674,8 +674,9 @@ static void rv770_gpu_init(struct radeon_device *rdev)
 								 r600_count_pipe_bits((cc_rb_backend_disable &
 										       R7XX_MAX_BACKENDS_MASK) >> 16)),
 								(cc_rb_backend_disable >> 16));
-	gb_tiling_config |= BACKEND_MAP(backend_map);
 
+	rdev->config.rv770.tile_config = gb_tiling_config;
+	gb_tiling_config |= BACKEND_MAP(backend_map);
 
 	WREG32(GB_TILING_CONFIG, gb_tiling_config);
 	WREG32(DCP_TILING_CONFIG, (gb_tiling_config & 0xffff));

include/drm/radeon_drm.h

@@ -904,6 +904,7 @@ struct drm_radeon_cs {
 #define RADEON_INFO_ACCEL_WORKING	0x03
 #define RADEON_INFO_CRTC_FROM_ID	0x04
 #define RADEON_INFO_ACCEL_WORKING2	0x05
+#define RADEON_INFO_TILING_CONFIG	0x06
 
 struct drm_radeon_info {
 	uint32_t		request;