drm/ttm: s/FLAG_SG/FLAG_EXTERNAL/

It covers more than just ttm_bo_type_sg usage, like with say dma-buf,
since one other user is userptr in amdgpu, and in the future we might
have some more. Hence EXTERNAL is likely a more suitable name.

v2(Christian):
  - Rename these to TTM_TT_FLAGS_*
  - Fix up all the holes in the flag values

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Christian König <christian.koenig@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210929132629.353541-1-matthew.auld@intel.com
Signed-off-by: Christian König <christian.koenig@amd.com>

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

@@ -894,7 +894,7 @@ static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
 			DRM_ERROR("failed to pin userptr\n");
 			return r;
 		}
-	} else if (ttm->page_flags & TTM_PAGE_FLAG_SG) {
+	} else if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) {
 		if (!ttm->sg) {
 			struct dma_buf_attachment *attach;
 			struct sg_table *sgt;
@@ -1130,7 +1130,7 @@ static int amdgpu_ttm_tt_populate(struct ttm_device *bdev,
 		return 0;
 	}
 
-	if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+	if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
 		return 0;
 
 	ret = ttm_pool_alloc(&adev->mman.bdev.pool, ttm, ctx);
@@ -1165,7 +1165,7 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev,
 		return;
 	}
 
-	if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+	if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
 		return;
 
 	for (i = 0; i < ttm->num_pages; ++i)
@@ -1198,8 +1198,8 @@ int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
 			return -ENOMEM;
 	}
 
-	/* Set TTM_PAGE_FLAG_SG before populate but after create. */
-	bo->ttm->page_flags |= TTM_PAGE_FLAG_SG;
+	/* Set TTM_TT_FLAG_EXTERNAL before populate but after create. */
+	bo->ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
 
 	gtt = (void *)bo->ttm;
 	gtt->userptr = addr;

drivers/gpu/drm/i915/gem/i915_gem_ttm.c

@@ -182,7 +182,7 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,
 
 	if (obj->flags & I915_BO_ALLOC_CPU_CLEAR &&
 	    man->use_tt)
-		page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+		page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
 
 	ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags,
 			  i915_ttm_select_tt_caching(obj));
@@ -451,7 +451,7 @@ static int i915_ttm_accel_move(struct ttm_buffer_object *bo,
 		if (bo->type == ttm_bo_type_kernel)
 			return -EINVAL;
 
-		if (ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC))
+		if (ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC))
 			return 0;
 
 		intel_engine_pm_get(i915->gt.migrate.context->engine);
@@ -525,7 +525,7 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict,
 
 	/* Populate ttm with pages if needed. Typically system memory. */
 	if (bo->ttm && (dst_man->use_tt ||
-			(bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED))) {
+			(bo->ttm->page_flags & TTM_TT_FLAG_SWAPPED))) {
 		ret = ttm_tt_populate(bo->bdev, bo->ttm, ctx);
 		if (ret)
 			return ret;

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -1249,7 +1249,7 @@ nouveau_ttm_tt_populate(struct ttm_device *bdev,
 	struct ttm_tt *ttm_dma = (void *)ttm;
 	struct nouveau_drm *drm;
 	struct device *dev;
-	bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+	bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
 
 	if (ttm_tt_is_populated(ttm))
 		return 0;
@@ -1272,7 +1272,7 @@ nouveau_ttm_tt_unpopulate(struct ttm_device *bdev,
 {
 	struct nouveau_drm *drm;
 	struct device *dev;
-	bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+	bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
 
 	if (slave)
 		return;

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -545,14 +545,14 @@ static int radeon_ttm_tt_populate(struct ttm_device *bdev,
 {
 	struct radeon_device *rdev = radeon_get_rdev(bdev);
 	struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
-	bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+	bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
 
 	if (gtt && gtt->userptr) {
 		ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
 		if (!ttm->sg)
 			return -ENOMEM;
 
-		ttm->page_flags |= TTM_PAGE_FLAG_SG;
+		ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
 		return 0;
 	}
 
@@ -569,13 +569,13 @@ static void radeon_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm
 {
 	struct radeon_device *rdev = radeon_get_rdev(bdev);
 	struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
-	bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+	bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL);
 
 	radeon_ttm_tt_unbind(bdev, ttm);
 
 	if (gtt && gtt->userptr) {
 		kfree(ttm->sg);
-		ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
+		ttm->page_flags &= ~TTM_TT_FLAG_EXTERNAL;
 		return;
 	}
 

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1115,8 +1115,8 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
 		return -EBUSY;
 
 	if (!bo->ttm || !ttm_tt_is_populated(bo->ttm) ||
-	    bo->ttm->page_flags & TTM_PAGE_FLAG_SG ||
-	    bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED ||
+	    bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL ||
+	    bo->ttm->page_flags & TTM_TT_FLAG_SWAPPED ||
 	    !ttm_bo_get_unless_zero(bo)) {
 		if (locked)
 			dma_resv_unlock(bo->base.resv);

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -103,7 +103,7 @@ void ttm_move_memcpy(struct ttm_buffer_object *bo,
 
 	/* Don't move nonexistent data. Clear destination instead. */
 	if (src_ops->maps_tt && (!ttm || !ttm_tt_is_populated(ttm))) {
-		if (ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC))
+		if (ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC))
 			return;
 
 		for (i = 0; i < num_pages; ++i) {
@@ -150,7 +150,7 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
 	struct ttm_kmap_iter *dst_iter, *src_iter;
 	int ret = 0;
 
-	if (ttm && ((ttm->page_flags & TTM_PAGE_FLAG_SWAPPED) ||
+	if (ttm && ((ttm->page_flags & TTM_TT_FLAG_SWAPPED) ||
 		    dst_man->use_tt)) {
 		ret = ttm_tt_populate(bdev, ttm, ctx);
 		if (ret)

drivers/gpu/drm/ttm/ttm_bo_vm.c

@@ -162,7 +162,7 @@ vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
 	 * Refuse to fault imported pages. This should be handled
 	 * (if at all) by redirecting mmap to the exporter.
 	 */
-	if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+	if (bo->ttm && (bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
 		dma_resv_unlock(bo->base.resv);
 		return VM_FAULT_SIGBUS;
 	}

drivers/gpu/drm/ttm/ttm_pool.c

@@ -371,7 +371,7 @@ int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
 	WARN_ON(!num_pages || ttm_tt_is_populated(tt));
 	WARN_ON(dma_addr && !pool->dev);
 
-	if (tt->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+	if (tt->page_flags & TTM_TT_FLAG_ZERO_ALLOC)
 		gfp_flags |= __GFP_ZERO;
 
 	if (ctx->gfp_retry_mayfail)

drivers/gpu/drm/ttm/ttm_tt.c

@@ -68,12 +68,12 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
 	switch (bo->type) {
 	case ttm_bo_type_device:
 		if (zero_alloc)
-			page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+			page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
 		break;
 	case ttm_bo_type_kernel:
 		break;
 	case ttm_bo_type_sg:
-		page_flags |= TTM_PAGE_FLAG_SG;
+		page_flags |= TTM_TT_FLAG_EXTERNAL;
 		break;
 	default:
 		pr_err("Illegal buffer object type\n");
@@ -156,7 +156,7 @@ EXPORT_SYMBOL(ttm_tt_init);
 
 void ttm_tt_fini(struct ttm_tt *ttm)
 {
-	WARN_ON(ttm->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED);
+	WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);
 
 	if (ttm->swap_storage)
 		fput(ttm->swap_storage);
@@ -178,7 +178,7 @@ int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
 
 	ttm_tt_init_fields(ttm, bo, page_flags, caching);
 
-	if (page_flags & TTM_PAGE_FLAG_SG)
+	if (page_flags & TTM_TT_FLAG_EXTERNAL)
 		ret = ttm_sg_tt_alloc_page_directory(ttm);
 	else
 		ret = ttm_dma_tt_alloc_page_directory(ttm);
@@ -224,7 +224,7 @@ int ttm_tt_swapin(struct ttm_tt *ttm)
 
 	fput(swap_storage);
 	ttm->swap_storage = NULL;
-	ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
+	ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;
 
 	return 0;
 
@@ -279,7 +279,7 @@ int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,
 
 	ttm_tt_unpopulate(bdev, ttm);
 	ttm->swap_storage = swap_storage;
-	ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
+	ttm->page_flags |= TTM_TT_FLAG_SWAPPED;
 
 	return ttm->num_pages;
 
@@ -300,7 +300,7 @@ int ttm_tt_populate(struct ttm_device *bdev,
 	if (ttm_tt_is_populated(ttm))
 		return 0;
 
-	if (!(ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
 		atomic_long_add(ttm->num_pages, &ttm_pages_allocated);
 		if (bdev->pool.use_dma32)
 			atomic_long_add(ttm->num_pages,
@@ -325,8 +325,8 @@ int ttm_tt_populate(struct ttm_device *bdev,
 	if (ret)
 		goto error;
 
-	ttm->page_flags |= TTM_PAGE_FLAG_PRIV_POPULATED;
-	if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+	ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;
+	if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {
 		ret = ttm_tt_swapin(ttm);
 		if (unlikely(ret != 0)) {
 			ttm_tt_unpopulate(bdev, ttm);
@@ -337,7 +337,7 @@ int ttm_tt_populate(struct ttm_device *bdev,
 	return 0;
 
 error:
-	if (!(ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);
 		if (bdev->pool.use_dma32)
 			atomic_long_sub(ttm->num_pages,
@@ -357,14 +357,14 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
 	else
 		ttm_pool_free(&bdev->pool, ttm);
 
-	if (!(ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);
 		if (bdev->pool.use_dma32)
 			atomic_long_sub(ttm->num_pages,
 					&ttm_dma32_pages_allocated);
 	}
 
-	ttm->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
+	ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;
 }
 
 #ifdef CONFIG_DEBUG_FS

include/drm/ttm/ttm_device.h

@@ -65,7 +65,7 @@ struct ttm_device_funcs {
 	 * ttm_tt_create
 	 *
 	 * @bo: The buffer object to create the ttm for.
-	 * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+	 * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
 	 *
 	 * Create a struct ttm_tt to back data with system memory pages.
 	 * No pages are actually allocated.

include/drm/ttm/ttm_tt.h

@@ -38,17 +38,17 @@ struct ttm_resource;
 struct ttm_buffer_object;
 struct ttm_operation_ctx;
 
-#define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
-#define TTM_PAGE_FLAG_ZERO_ALLOC      (1 << 6)
-#define TTM_PAGE_FLAG_SG              (1 << 8)
+#define TTM_TT_FLAG_SWAPPED	(1 << 0)
+#define TTM_TT_FLAG_ZERO_ALLOC	(1 << 1)
+#define TTM_TT_FLAG_EXTERNAL	(1 << 2)
 
-#define TTM_PAGE_FLAG_PRIV_POPULATED  (1 << 31)
+#define TTM_TT_FLAG_PRIV_POPULATED  (1 << 31)
 
 /**
  * struct ttm_tt
  *
  * @pages: Array of pages backing the data.
- * @page_flags: see TTM_PAGE_FLAG_*
+ * @page_flags: see TTM_TT_FLAG_*
  * @num_pages: Number of pages in the page array.
  * @sg: for SG objects via dma-buf
  * @dma_address: The DMA (bus) addresses of the pages
@@ -84,7 +84,7 @@ struct ttm_kmap_iter_tt {
 
 static inline bool ttm_tt_is_populated(struct ttm_tt *tt)
 {
-	return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED;
+	return tt->page_flags & TTM_TT_FLAG_PRIV_POPULATED;
 }
 
 /**
@@ -103,7 +103,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc);
  *
  * @ttm: The struct ttm_tt.
  * @bo: The buffer object we create the ttm for.
- * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
  * @caching: the desired caching state of the pages
  *
  * Create a struct ttm_tt to back data with system memory pages.
@@ -178,7 +178,7 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm);
  */
 static inline void ttm_tt_mark_for_clear(struct ttm_tt *ttm)
 {
-	ttm->page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+	ttm->page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
 }
 
 void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages);
@@ -194,7 +194,7 @@ struct ttm_kmap_iter *ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt,
  *
  * @bo: Buffer object we allocate the ttm for.
  * @bridge: The agp bridge this device is sitting on.
- * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
  *
  *
  * Create a TTM backend that uses the indicated AGP bridge as an aperture