drm/radeon: add si tile mode array query v3

Allow userspace to query for the tile mode array so userspace can properly
compute surface pitch and alignment requirement depending on tiling.

v2: Make strict aliasing safer by casting to char when copying
v3: merge fix from Christian

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 94 insertions, 80 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 3037c38..a24b9ba 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -176,80 +176,65 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_info *info = data;
 	struct radeon_mode_info *minfo = &rdev->mode_info;
-	uint32_t value, *value_ptr;
-	uint64_t value64, *value_ptr64;
+	uint32_t *value, value_tmp, *value_ptr, value_size;
+	uint64_t value64;
 	struct drm_crtc *crtc;
 	int i, found;
 
-	/* TIMESTAMP is a 64-bit value, needs special handling. */
-	if (info->request == RADEON_INFO_TIMESTAMP) {
-		if (rdev->family >= CHIP_R600) {
-			value_ptr64 = (uint64_t*)((unsigned long)info->value);
-			value64 = radeon_get_gpu_clock_counter(rdev);
-
-			if (DRM_COPY_TO_USER(value_ptr64, &value64, sizeof(value64))) {
-				DRM_ERROR("copy_to_user %s:%u\n", __func__, __LINE__);
-				return -EFAULT;
-			}
-			return 0;
-		} else {
-			DRM_DEBUG_KMS("timestamp is r6xx+ only!\n");
-			return -EINVAL;
-		}
-	}
-
 	value_ptr = (uint32_t *)((unsigned long)info->value);
-	if (DRM_COPY_FROM_USER(&value, value_ptr, sizeof(value))) {
-		DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__);
-		return -EFAULT;
-	}
+	value = &value_tmp;
+	value_size = sizeof(uint32_t);
 
 	switch (info->request) {
 	case RADEON_INFO_DEVICE_ID:
-		value = dev->pci_device;
+		*value = dev->pci_device;
 		break;
 	case RADEON_INFO_NUM_GB_PIPES:
-		value = rdev->num_gb_pipes;
+		*value = rdev->num_gb_pipes;
 		break;
 	case RADEON_INFO_NUM_Z_PIPES:
-		value = rdev->num_z_pipes;
+		*value = rdev->num_z_pipes;
 		break;
 	case RADEON_INFO_ACCEL_WORKING:
 		/* xf86-video-ati 6.13.0 relies on this being false for evergreen */
 		if ((rdev->family >= CHIP_CEDAR) && (rdev->family <= CHIP_HEMLOCK))
-			value = false;
+			*value = false;
 		else
-			value = rdev->accel_working;
+			*value = rdev->accel_working;
 		break;
 	case RADEON_INFO_CRTC_FROM_ID:
+		if (DRM_COPY_FROM_USER(value, value_ptr, sizeof(uint32_t))) {
+			DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__);
+			return -EFAULT;
+		}
 		for (i = 0, found = 0; i < rdev->num_crtc; i++) {
 			crtc = (struct drm_crtc *)minfo->crtcs[i];
-			if (crtc && crtc->base.id == value) {
+			if (crtc && crtc->base.id == *value) {
 				struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
-				value = radeon_crtc->crtc_id;
+				*value = radeon_crtc->crtc_id;
 				found = 1;
 				break;
 			}
 		}
 		if (!found) {
-			DRM_DEBUG_KMS("unknown crtc id %d\n", value);
+			DRM_DEBUG_KMS("unknown crtc id %d\n", *value);
 			return -EINVAL;
 		}
 		break;
 	case RADEON_INFO_ACCEL_WORKING2:
-		value = rdev->accel_working;
+		*value = rdev->accel_working;
 		break;
 	case RADEON_INFO_TILING_CONFIG:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.tile_config;
+			*value = rdev->config.si.tile_config;
 		else if (rdev->family >= CHIP_CAYMAN)
-			value = rdev->config.cayman.tile_config;
+			*value = rdev->config.cayman.tile_config;
 		else if (rdev->family >= CHIP_CEDAR)
-			value = rdev->config.evergreen.tile_config;
+			*value = rdev->config.evergreen.tile_config;
 		else if (rdev->family >= CHIP_RV770)
-			value = rdev->config.rv770.tile_config;
+			*value = rdev->config.rv770.tile_config;
 		else if (rdev->family >= CHIP_R600)
-			value = rdev->config.r600.tile_config;
+			*value = rdev->config.r600.tile_config;
 		else {
 			DRM_DEBUG_KMS("tiling config is r6xx+ only!\n");
 			return -EINVAL;
@@ -262,73 +247,81 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 		 *
 		 * When returning, the value is 1 if filp owns hyper-z access,
 		 * 0 otherwise. */
-		if (value >= 2) {
-			DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", value);
+		if (DRM_COPY_FROM_USER(value, value_ptr, sizeof(uint32_t))) {
+			DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__);
+			return -EFAULT;
+		}
+		if (*value >= 2) {
+			DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", *value);
 			return -EINVAL;
 		}
-		radeon_set_filp_rights(dev, &rdev->hyperz_filp, filp, &value);
+		radeon_set_filp_rights(dev, &rdev->hyperz_filp, filp, value);
 		break;
 	case RADEON_INFO_WANT_CMASK:
 		/* The same logic as Hyper-Z. */
-		if (value >= 2) {
-			DRM_DEBUG_KMS("WANT_CMASK: invalid value %d\n", value);
+		if (DRM_COPY_FROM_USER(value, value_ptr, sizeof(uint32_t))) {
+			DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__);
+			return -EFAULT;
+		}
+		if (*value >= 2) {
+			DRM_DEBUG_KMS("WANT_CMASK: invalid value %d\n", *value);
 			return -EINVAL;
 		}
-		radeon_set_filp_rights(dev, &rdev->cmask_filp, filp, &value);
+		radeon_set_filp_rights(dev, &rdev->cmask_filp, filp, value);
 		break;
 	case RADEON_INFO_CLOCK_CRYSTAL_FREQ:
 		/* return clock value in KHz */
 		if (rdev->asic->get_xclk)
-			value = radeon_get_xclk(rdev) * 10;
+			*value = radeon_get_xclk(rdev) * 10;
 		else
-			value = rdev->clock.spll.reference_freq * 10;
+			*value = rdev->clock.spll.reference_freq * 10;
 		break;
 	case RADEON_INFO_NUM_BACKENDS:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.max_backends_per_se *
+			*value = rdev->config.si.max_backends_per_se *
 				rdev->config.si.max_shader_engines;
 		else if (rdev->family >= CHIP_CAYMAN)
-			value = rdev->config.cayman.max_backends_per_se *
+			*value = rdev->config.cayman.max_backends_per_se *
 				rdev->config.cayman.max_shader_engines;
 		else if (rdev->family >= CHIP_CEDAR)
-			value = rdev->config.evergreen.max_backends;
+			*value = rdev->config.evergreen.max_backends;
 		else if (rdev->family >= CHIP_RV770)
-			value = rdev->config.rv770.max_backends;
+			*value = rdev->config.rv770.max_backends;
 		else if (rdev->family >= CHIP_R600)
-			value = rdev->config.r600.max_backends;
+			*value = rdev->config.r600.max_backends;
 		else {
 			return -EINVAL;
 		}
 		break;
 	case RADEON_INFO_NUM_TILE_PIPES:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.max_tile_pipes;
+			*value = rdev->config.si.max_tile_pipes;
 		else if (rdev->family >= CHIP_CAYMAN)
-			value = rdev->config.cayman.max_tile_pipes;
+			*value = rdev->config.cayman.max_tile_pipes;
 		else if (rdev->family >= CHIP_CEDAR)
-			value = rdev->config.evergreen.max_tile_pipes;
+			*value = rdev->config.evergreen.max_tile_pipes;
 		else if (rdev->family >= CHIP_RV770)
-			value = rdev->config.rv770.max_tile_pipes;
+			*value = rdev->config.rv770.max_tile_pipes;
 		else if (rdev->family >= CHIP_R600)
-			value = rdev->config.r600.max_tile_pipes;
+			*value = rdev->config.r600.max_tile_pipes;
 		else {
 			return -EINVAL;
 		}
 		break;
 	case RADEON_INFO_FUSION_GART_WORKING:
-		value = 1;
+		*value = 1;
 		break;
 	case RADEON_INFO_BACKEND_MAP:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.backend_map;
+			*value = rdev->config.si.backend_map;
 		else if (rdev->family >= CHIP_CAYMAN)
-			value = rdev->config.cayman.backend_map;
+			*value = rdev->config.cayman.backend_map;
 		else if (rdev->family >= CHIP_CEDAR)
-			value = rdev->config.evergreen.backend_map;
+			*value = rdev->config.evergreen.backend_map;
 		else if (rdev->family >= CHIP_RV770)
-			value = rdev->config.rv770.backend_map;
+			*value = rdev->config.rv770.backend_map;
 		else if (rdev->family >= CHIP_R600)
-			value = rdev->config.r600.backend_map;
+			*value = rdev->config.r600.backend_map;
 		else {
 			return -EINVAL;
 		}
@@ -337,70 +330,91 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 		/* this is where we report if vm is supported or not */
 		if (rdev->family < CHIP_CAYMAN)
 			return -EINVAL;
-		value = RADEON_VA_RESERVED_SIZE;
+		*value = RADEON_VA_RESERVED_SIZE;
 		break;
 	case RADEON_INFO_IB_VM_MAX_SIZE:
 		/* this is where we report if vm is supported or not */
 		if (rdev->family < CHIP_CAYMAN)
 			return -EINVAL;
-		value = RADEON_IB_VM_MAX_SIZE;
+		*value = RADEON_IB_VM_MAX_SIZE;
 		break;
 	case RADEON_INFO_MAX_PIPES:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.max_cu_per_sh;
+			*value = rdev->config.si.max_cu_per_sh;
 		else if (rdev->family >= CHIP_CAYMAN)
-			value = rdev->config.cayman.max_pipes_per_simd;
+			*value = rdev->config.cayman.max_pipes_per_simd;
 		else if (rdev->family >= CHIP_CEDAR)
-			value = rdev->config.evergreen.max_pipes;
+			*value = rdev->config.evergreen.max_pipes;
 		else if (rdev->family >= CHIP_RV770)
-			value = rdev->config.rv770.max_pipes;
+			*value = rdev->config.rv770.max_pipes;
 		else if (rdev->family >= CHIP_R600)
-			value = rdev->config.r600.max_pipes;
+			*value = rdev->config.r600.max_pipes;
 		else {
 			return -EINVAL;
 		}
 		break;
+	case RADEON_INFO_TIMESTAMP:
+		if (rdev->family < CHIP_R600) {
+			DRM_DEBUG_KMS("timestamp is r6xx+ only!\n");
+			return -EINVAL;
+		}
+		value = (uint32_t*)&value64;
+		value_size = sizeof(uint64_t);
+		value64 = radeon_get_gpu_clock_counter(rdev);
+		break;
 	case RADEON_INFO_MAX_SE:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.max_shader_engines;
+			*value = rdev->config.si.max_shader_engines;
 		else if (rdev->family >= CHIP_CAYMAN)
-			value = rdev->config.cayman.max_shader_engines;
+			*value = rdev->config.cayman.max_shader_engines;
 		else if (rdev->family >= CHIP_CEDAR)
-			value = rdev->config.evergreen.num_ses;
+			*value = rdev->config.evergreen.num_ses;
 		else
-			value = 1;
+			*value = 1;
 		break;
 	case RADEON_INFO_MAX_SH_PER_SE:
 		if (rdev->family >= CHIP_TAHITI)
-			value = rdev->config.si.max_sh_per_se;
+			*value = rdev->config.si.max_sh_per_se;
 		else
 			return -EINVAL;
 		break;
 	case RADEON_INFO_FASTFB_WORKING:
-		value = rdev->fastfb_working;
+		*value = rdev->fastfb_working;
 		break;
 	case RADEON_INFO_RING_WORKING:
-		switch (value) {
+		if (DRM_COPY_FROM_USER(value, value_ptr, sizeof(uint32_t))) {
+			DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__);
+			return -EFAULT;
+		}
+		switch (*value) {
 		case RADEON_CS_RING_GFX:
 		case RADEON_CS_RING_COMPUTE:
-			value = rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ready;
+			*value = rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ready;
 			break;
 		case RADEON_CS_RING_DMA:
-			value = rdev->ring[R600_RING_TYPE_DMA_INDEX].ready;
-			value |= rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready;
+			*value = rdev->ring[R600_RING_TYPE_DMA_INDEX].ready;
+			*value |= rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready;
 			break;
 		case RADEON_CS_RING_UVD:
-			value = rdev->ring[R600_RING_TYPE_UVD_INDEX].ready;
+			*value = rdev->ring[R600_RING_TYPE_UVD_INDEX].ready;
 			break;
 		default:
 			return -EINVAL;
 		}
 		break;
+	case RADEON_INFO_SI_TILE_MODE_ARRAY:
+		if (rdev->family < CHIP_TAHITI) {
+			DRM_DEBUG_KMS("tile mode array is si only!\n");
+			return -EINVAL;
+		}
+		value = rdev->config.si.tile_mode_array;
+		value_size = sizeof(uint32_t)*32;
+		break;
 	default:
 		DRM_DEBUG_KMS("Invalid request %d\n", info->request);
 		return -EINVAL;
 	}
-	if (DRM_COPY_TO_USER(value_ptr, &value, sizeof(uint32_t))) {
+	if (DRM_COPY_TO_USER(value_ptr, (char*)value, value_size)) {
 		DRM_ERROR("copy_to_user %s:%u\n", __func__, __LINE__);
 		return -EFAULT;
 	}