diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_drv.h')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 98 |
1 files changed, 97 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 150ec64af617..e401d5dbcb96 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -177,6 +177,58 @@ struct vmw_res_cache_entry { struct vmw_resource_val_node *node; }; +/** + * enum vmw_dma_map_mode - indicate how to perform TTM page dma mappings. + */ +enum vmw_dma_map_mode { + vmw_dma_phys, /* Use physical page addresses */ + vmw_dma_alloc_coherent, /* Use TTM coherent pages */ + vmw_dma_map_populate, /* Unmap from DMA just after unpopulate */ + vmw_dma_map_bind, /* Unmap from DMA just before unbind */ + vmw_dma_map_max +}; + +/** + * struct vmw_sg_table - Scatter/gather table for binding, with additional + * device-specific information. + * + * @sgt: Pointer to a struct sg_table with binding information + * @num_regions: Number of regions with device-address contigous pages + */ +struct vmw_sg_table { + enum vmw_dma_map_mode mode; + struct page **pages; + const dma_addr_t *addrs; + struct sg_table *sgt; + unsigned long num_regions; + unsigned long num_pages; +}; + +/** + * struct vmw_piter - Page iterator that iterates over a list of pages + * and DMA addresses that could be either a scatter-gather list or + * arrays + * + * @pages: Array of page pointers to the pages. + * @addrs: DMA addresses to the pages if coherent pages are used. + * @iter: Scatter-gather page iterator. Current position in SG list. + * @i: Current position in arrays. + * @num_pages: Number of pages total. + * @next: Function to advance the iterator. Returns false if past the list + * of pages, true otherwise. + * @dma_address: Function to return the DMA address of the current page. + */ +struct vmw_piter { + struct page **pages; + const dma_addr_t *addrs; + struct sg_page_iter iter; + unsigned long i; + unsigned long num_pages; + bool (*next)(struct vmw_piter *); + dma_addr_t (*dma_address)(struct vmw_piter *); + struct page *(*page)(struct vmw_piter *); +}; + struct vmw_sw_context{ struct drm_open_hash res_ht; bool res_ht_initialized; @@ -358,6 +410,11 @@ struct vmw_private { struct list_head res_lru[vmw_res_max]; uint32_t used_memory_size; + + /* + * DMA mapping stuff. + */ + enum vmw_dma_map_mode map_mode; }; static inline struct vmw_surface *vmw_res_to_srf(struct vmw_resource *res) @@ -405,7 +462,7 @@ void vmw_3d_resource_dec(struct vmw_private *dev_priv, bool hide_svga); */ extern int vmw_gmr_bind(struct vmw_private *dev_priv, - struct page *pages[], + const struct vmw_sg_table *vsgt, unsigned long num_pages, int gmr_id); extern void vmw_gmr_unbind(struct vmw_private *dev_priv, int gmr_id); @@ -568,6 +625,45 @@ extern struct ttm_placement vmw_evictable_placement; extern struct ttm_placement vmw_srf_placement; extern struct ttm_bo_driver vmw_bo_driver; extern int vmw_dma_quiescent(struct drm_device *dev); +extern void vmw_piter_start(struct vmw_piter *viter, + const struct vmw_sg_table *vsgt, + unsigned long p_offs); + +/** + * vmw_piter_next - Advance the iterator one page. + * + * @viter: Pointer to the iterator to advance. + * + * Returns false if past the list of pages, true otherwise. + */ +static inline bool vmw_piter_next(struct vmw_piter *viter) +{ + return viter->next(viter); +} + +/** + * vmw_piter_dma_addr - Return the DMA address of the current page. + * + * @viter: Pointer to the iterator + * + * Returns the DMA address of the page pointed to by @viter. + */ +static inline dma_addr_t vmw_piter_dma_addr(struct vmw_piter *viter) +{ + return viter->dma_address(viter); +} + +/** + * vmw_piter_page - Return a pointer to the current page. + * + * @viter: Pointer to the iterator + * + * Returns the DMA address of the page pointed to by @viter. + */ +static inline struct page *vmw_piter_page(struct vmw_piter *viter) +{ + return viter->page(viter); +} /** * Command submission - vmwgfx_execbuf.c |
