From 51ab7ba2673758561074184795bba5bac780a038 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 18 May 2012 15:40:33 +0100 Subject: drm/prime: introduce sg->pages/addr arrays helper the ttm drivers need this currently, in order to get fault handling working and efficient. It also allows addrs to be NULL for devices like udl. Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- include/drm/drmP.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 15d91798dd31..31ad880ca2ef 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1558,6 +1558,8 @@ extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data, extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages, + dma_addr_t *addrs, int max_pages); extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages); extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg); -- cgit v1.2.3 From 129b78bfca591e736e56a294f0e357d73d938f7e Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Mon, 2 Apr 2012 11:46:06 +0100 Subject: ttm: add prime sharing support to TTM (v2) This adds the ability for ttm common code to take an SG table and use it as the backing for a slave TTM object. The drivers can then populate their GTT tables using the SG object. v2: make sure to setup VM for sg bos as well. Reviewed-by: Alex Deucher Reviewed-by: Jerome Glisse Signed-off-by: Dave Airlie --- include/drm/ttm/ttm_bo_api.h | 9 ++++++++- include/drm/ttm/ttm_bo_driver.h | 2 ++ 2 files changed, 10 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index 974c8f801c39..e15f2a89a270 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -124,11 +124,15 @@ struct ttm_mem_reg { * * @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers, * but they cannot be accessed from user-space. For kernel-only use. + * + * @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another + * driver. */ enum ttm_bo_type { ttm_bo_type_device, - ttm_bo_type_kernel + ttm_bo_type_kernel, + ttm_bo_type_sg }; struct ttm_tt; @@ -271,6 +275,8 @@ struct ttm_buffer_object { unsigned long offset; uint32_t cur_placement; + + struct sg_table *sg; }; /** @@ -503,6 +509,7 @@ extern int ttm_bo_init(struct ttm_bo_device *bdev, bool interrubtible, struct file *persistent_swap_storage, size_t acc_size, + struct sg_table *sg, void (*destroy) (struct ttm_buffer_object *)); /** diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index d43e892307ff..a05f1b55714d 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -81,6 +81,7 @@ struct ttm_backend_func { #define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5) #define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6) #define TTM_PAGE_FLAG_DMA32 (1 << 7) +#define TTM_PAGE_FLAG_SG (1 << 8) enum ttm_caching_state { tt_uncached, @@ -116,6 +117,7 @@ struct ttm_tt { struct page **pages; uint32_t page_flags; unsigned long num_pages; + struct sg_table *sg; /* for SG objects via dma-buf */ struct ttm_bo_global *glob; struct ttm_backend *be; struct file *swap_storage; -- cgit v1.2.3