[PATCH v4 05/14] drm/ttm: s/FLAG_SG/FLAG_EXTERNAL/

Christian König christian.koenig at amd.com
Tue Sep 21 11:30:40 UTC 2021


Am 21.09.21 um 13:01 schrieb Matthew Auld:
> 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 at amd.com>
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
> Cc: Christian König <christian.koenig at amd.com>

Acked-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 10 +++++-----
>   drivers/gpu/drm/i915/gem/i915_gem_ttm.c |  6 +++---
>   drivers/gpu/drm/nouveau/nouveau_bo.c    |  4 ++--
>   drivers/gpu/drm/radeon/radeon_ttm.c     |  8 ++++----
>   drivers/gpu/drm/ttm/ttm_bo.c            |  4 ++--
>   drivers/gpu/drm/ttm/ttm_bo_util.c       |  4 ++--
>   drivers/gpu/drm/ttm/ttm_bo_vm.c         |  2 +-
>   drivers/gpu/drm/ttm/ttm_pool.c          |  2 +-
>   drivers/gpu/drm/ttm/ttm_tt.c            | 24 ++++++++++++------------
>   include/drm/ttm/ttm_device.h            |  2 +-
>   include/drm/ttm/ttm_tt.h                | 18 +++++++++---------
>   11 files changed, 42 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 438377a89aa3..0cf94421665f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/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;
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> index 2f672f06b169..fd5b925b27c5 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> +++ b/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));
> @@ -546,7 +546,7 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict,
>   	}
>   
>   	/* Populate ttm with pages if needed. Typically system memory. */
> -	if (ttm && (dst_man->use_tt || (ttm->page_flags & TTM_PAGE_FLAG_SWAPPED))) {
> +	if (ttm && (dst_man->use_tt || (ttm->page_flags & TTM_TT_FLAG_SWAPPED))) {
>   		ret = ttm_tt_populate(bo->bdev, ttm, ctx);
>   		if (ret)
>   			return ret;
> @@ -557,7 +557,7 @@ static int i915_ttm_move(struct ttm_buffer_object *bo, bool evict,
>   		return PTR_ERR(dst_st);
>   
>   	clear = !cpu_maps_iomem(bo->resource) && (!ttm || !ttm_tt_is_populated(ttm));
> -	if (!(clear && ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)))
> +	if (!(clear && ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC)))
>   		__i915_ttm_move(bo, clear, dst_mem, dst_st);
>   
>   	ttm_bo_move_sync_cleanup(bo, dst_mem);
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index d3b21d318b42..12b107acb6ee 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -1250,7 +1250,7 @@ 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;
> @@ -1273,7 +1273,7 @@ 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;
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index 7793249bc549..11b21d605584 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/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;
>   	}
>   
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 3b22c0013dbf..d62b2013c367 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/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);
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> index c893c3db2623..a342d701c91c 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> @@ -147,7 +147,7 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
>   	bool clear;
>   	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)
> @@ -169,7 +169,7 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
>   	}
>   
>   	clear = src_iter->ops->maps_tt && (!ttm || !ttm_tt_is_populated(ttm));
> -	if (!(clear && ttm && !(ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)))
> +	if (!(clear && ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC)))
>   		ttm_move_memcpy(clear, dst_mem->num_pages, dst_iter, src_iter);
>   
>   	if (!src_iter->ops->maps_tt)
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> index 9a2119fe4bdd..950f4f132802 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
> +++ b/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;
>   	}
> diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
> index c961a788b519..1bba0a0ed3f9 100644
> --- a/drivers/gpu/drm/ttm/ttm_pool.c
> +++ b/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)
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index 980ecb079b2c..86f31fde6e35 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/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
> diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h
> index cbe03d45e883..0a4ddec78d8f 100644
> --- a/include/drm/ttm/ttm_device.h
> +++ b/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.
> diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
> index 842ce756213c..b023cd58ff38 100644
> --- a/include/drm/ttm/ttm_tt.h
> +++ b/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



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