185438a8dSThomas Zimmermann /* SPDX-License-Identifier: GPL-2.0-or-later */ 285438a8dSThomas Zimmermann 385438a8dSThomas Zimmermann #ifndef DRM_GEM_VRAM_HELPER_H 485438a8dSThomas Zimmermann #define DRM_GEM_VRAM_HELPER_H 585438a8dSThomas Zimmermann 66b5ce4a1SThomas Zimmermann #include <drm/drm_file.h> 785438a8dSThomas Zimmermann #include <drm/drm_gem.h> 8*ede0c69cSThomas Zimmermann #include <drm/drm_gem_ttm_helper.h> 96b5ce4a1SThomas Zimmermann #include <drm/drm_ioctl.h> 1080f7c3f7SThomas Zimmermann #include <drm/drm_modes.h> 1185438a8dSThomas Zimmermann #include <drm/ttm/ttm_bo_api.h> 126b5ce4a1SThomas Zimmermann #include <drm/ttm/ttm_bo_driver.h> 136b5ce4a1SThomas Zimmermann 1449a3f51dSThomas Zimmermann #include <linux/dma-buf-map.h> 1585438a8dSThomas Zimmermann #include <linux/kernel.h> /* for container_of() */ 1685438a8dSThomas Zimmermann 17fed1eec0SThomas Zimmermann struct drm_mode_create_dumb; 186542ad89SThomas Zimmermann struct drm_plane; 196542ad89SThomas Zimmermann struct drm_plane_state; 206542ad89SThomas Zimmermann struct drm_simple_display_pipe; 2185438a8dSThomas Zimmermann struct filp; 2259f5989aSThomas Zimmermann struct vm_area_struct; 2385438a8dSThomas Zimmermann 247053e0eaSChristian König #define DRM_GEM_VRAM_PL_FLAG_SYSTEM (1 << 0) 257053e0eaSChristian König #define DRM_GEM_VRAM_PL_FLAG_VRAM (1 << 1) 267053e0eaSChristian König #define DRM_GEM_VRAM_PL_FLAG_TOPDOWN (1 << 2) 2785438a8dSThomas Zimmermann 2885438a8dSThomas Zimmermann /* 2985438a8dSThomas Zimmermann * Buffer-object helpers 3085438a8dSThomas Zimmermann */ 3185438a8dSThomas Zimmermann 3285438a8dSThomas Zimmermann /** 3385438a8dSThomas Zimmermann * struct drm_gem_vram_object - GEM object backed by VRAM 3485438a8dSThomas Zimmermann * @bo: TTM buffer object 3549a3f51dSThomas Zimmermann * @map: Mapping information for @bo 3685438a8dSThomas Zimmermann * @placement: TTM placement information. Supported placements are \ 3785438a8dSThomas Zimmermann %TTM_PL_VRAM and %TTM_PL_SYSTEM 3885438a8dSThomas Zimmermann * @placements: TTM placement information. 3985438a8dSThomas Zimmermann * 4085438a8dSThomas Zimmermann * The type struct drm_gem_vram_object represents a GEM object that is 4185438a8dSThomas Zimmermann * backed by VRAM. It can be used for simple framebuffer devices with 4285438a8dSThomas Zimmermann * dedicated memory. The buffer object can be evicted to system memory if 4385438a8dSThomas Zimmermann * video memory becomes scarce. 4437a48adfSThomas Zimmermann * 4537a48adfSThomas Zimmermann * GEM VRAM objects perform reference counting for pin and mapping 4637a48adfSThomas Zimmermann * operations. So a buffer object that has been pinned N times with 4737a48adfSThomas Zimmermann * drm_gem_vram_pin() must be unpinned N times with 4837a48adfSThomas Zimmermann * drm_gem_vram_unpin(). The same applies to pairs of 49c8908bdeSThomas Zimmermann * drm_gem_vram_kmap() and drm_gem_vram_kunmap(), as well as pairs of 50c8908bdeSThomas Zimmermann * drm_gem_vram_vmap() and drm_gem_vram_vunmap(). 5185438a8dSThomas Zimmermann */ 5285438a8dSThomas Zimmermann struct drm_gem_vram_object { 5385438a8dSThomas Zimmermann struct ttm_buffer_object bo; 5449a3f51dSThomas Zimmermann struct dma_buf_map map; 5585438a8dSThomas Zimmermann 5637a48adfSThomas Zimmermann /** 5749a3f51dSThomas Zimmermann * @vmap_use_count: 5837a48adfSThomas Zimmermann * 5937a48adfSThomas Zimmermann * Reference count on the virtual address. 6037a48adfSThomas Zimmermann * The address are un-mapped when the count reaches zero. 6137a48adfSThomas Zimmermann */ 6249a3f51dSThomas Zimmermann unsigned int vmap_use_count; 6337a48adfSThomas Zimmermann 6485438a8dSThomas Zimmermann /* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */ 6585438a8dSThomas Zimmermann struct ttm_placement placement; 6685438a8dSThomas Zimmermann struct ttm_place placements[2]; 6785438a8dSThomas Zimmermann }; 6885438a8dSThomas Zimmermann 6985438a8dSThomas Zimmermann /** 70e9d2871fSMauro Carvalho Chehab * drm_gem_vram_of_bo - Returns the container of type 71e9d2871fSMauro Carvalho Chehab * &struct drm_gem_vram_object for field bo. 7285438a8dSThomas Zimmermann * @bo: the VRAM buffer object 7385438a8dSThomas Zimmermann * Returns: The containing GEM VRAM object 7485438a8dSThomas Zimmermann */ 7585438a8dSThomas Zimmermann static inline struct drm_gem_vram_object *drm_gem_vram_of_bo( 7685438a8dSThomas Zimmermann struct ttm_buffer_object *bo) 7785438a8dSThomas Zimmermann { 7885438a8dSThomas Zimmermann return container_of(bo, struct drm_gem_vram_object, bo); 7985438a8dSThomas Zimmermann } 8085438a8dSThomas Zimmermann 8185438a8dSThomas Zimmermann /** 82e9d2871fSMauro Carvalho Chehab * drm_gem_vram_of_gem - Returns the container of type 83e9d2871fSMauro Carvalho Chehab * &struct drm_gem_vram_object for field gem. 8485438a8dSThomas Zimmermann * @gem: the GEM object 8585438a8dSThomas Zimmermann * Returns: The containing GEM VRAM object 8685438a8dSThomas Zimmermann */ 8785438a8dSThomas Zimmermann static inline struct drm_gem_vram_object *drm_gem_vram_of_gem( 8885438a8dSThomas Zimmermann struct drm_gem_object *gem) 8985438a8dSThomas Zimmermann { 900e580c6dSGerd Hoffmann return container_of(gem, struct drm_gem_vram_object, bo.base); 9185438a8dSThomas Zimmermann } 9285438a8dSThomas Zimmermann 9385438a8dSThomas Zimmermann struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev, 9485438a8dSThomas Zimmermann size_t size, 95ebe9428bSThomas Zimmermann unsigned long pg_align); 9685438a8dSThomas Zimmermann void drm_gem_vram_put(struct drm_gem_vram_object *gbo); 9785438a8dSThomas Zimmermann s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo); 9885438a8dSThomas Zimmermann int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag); 9985438a8dSThomas Zimmermann int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo); 10049a3f51dSThomas Zimmermann int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map); 10149a3f51dSThomas Zimmermann void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map); 10285438a8dSThomas Zimmermann 103fed1eec0SThomas Zimmermann int drm_gem_vram_fill_create_dumb(struct drm_file *file, 104fed1eec0SThomas Zimmermann struct drm_device *dev, 105fed1eec0SThomas Zimmermann unsigned long pg_align, 10698707327SThomas Zimmermann unsigned long pitch_align, 107fed1eec0SThomas Zimmermann struct drm_mode_create_dumb *args); 108fed1eec0SThomas Zimmermann 1096c812bc5SThomas Zimmermann /* 110737000fdSThomas Zimmermann * Helpers for struct drm_driver 111737000fdSThomas Zimmermann */ 112737000fdSThomas Zimmermann 11359f5989aSThomas Zimmermann int drm_gem_vram_driver_dumb_create(struct drm_file *file, 11459f5989aSThomas Zimmermann struct drm_device *dev, 11559f5989aSThomas Zimmermann struct drm_mode_create_dumb *args); 11659f5989aSThomas Zimmermann 1176542ad89SThomas Zimmermann /* 1186542ad89SThomas Zimmermann * Helpers for struct drm_plane_helper_funcs 1196542ad89SThomas Zimmermann */ 1206542ad89SThomas Zimmermann int 1216542ad89SThomas Zimmermann drm_gem_vram_plane_helper_prepare_fb(struct drm_plane *plane, 1226542ad89SThomas Zimmermann struct drm_plane_state *new_state); 1236542ad89SThomas Zimmermann void 1246542ad89SThomas Zimmermann drm_gem_vram_plane_helper_cleanup_fb(struct drm_plane *plane, 1256542ad89SThomas Zimmermann struct drm_plane_state *old_state); 1266542ad89SThomas Zimmermann 1276542ad89SThomas Zimmermann /* 1286542ad89SThomas Zimmermann * Helpers for struct drm_simple_display_pipe_funcs 1296542ad89SThomas Zimmermann */ 1306542ad89SThomas Zimmermann 1316542ad89SThomas Zimmermann int drm_gem_vram_simple_display_pipe_prepare_fb( 1326542ad89SThomas Zimmermann struct drm_simple_display_pipe *pipe, 1336542ad89SThomas Zimmermann struct drm_plane_state *new_state); 1346542ad89SThomas Zimmermann 1356542ad89SThomas Zimmermann void drm_gem_vram_simple_display_pipe_cleanup_fb( 1366542ad89SThomas Zimmermann struct drm_simple_display_pipe *pipe, 1376542ad89SThomas Zimmermann struct drm_plane_state *old_state); 1386542ad89SThomas Zimmermann 13959f5989aSThomas Zimmermann /** 14059f5989aSThomas Zimmermann * define DRM_GEM_VRAM_DRIVER - default callback functions for \ 14159f5989aSThomas Zimmermann &struct drm_driver 14259f5989aSThomas Zimmermann * 14359f5989aSThomas Zimmermann * Drivers that use VRAM MM and GEM VRAM can use this macro to initialize 14459f5989aSThomas Zimmermann * &struct drm_driver with default functions. 14559f5989aSThomas Zimmermann */ 14659f5989aSThomas Zimmermann #define DRM_GEM_VRAM_DRIVER \ 1479286766bSGerd Hoffmann .debugfs_init = drm_vram_mm_debugfs_init, \ 14859f5989aSThomas Zimmermann .dumb_create = drm_gem_vram_driver_dumb_create, \ 149*ede0c69cSThomas Zimmermann .dumb_map_offset = drm_gem_ttm_dumb_map_offset, \ 15031070a87SThomas Zimmermann .gem_prime_mmap = drm_gem_prime_mmap 15159f5989aSThomas Zimmermann 1526b5ce4a1SThomas Zimmermann /* 1536b5ce4a1SThomas Zimmermann * VRAM memory manager 1546b5ce4a1SThomas Zimmermann */ 1556b5ce4a1SThomas Zimmermann 1566b5ce4a1SThomas Zimmermann /** 1576b5ce4a1SThomas Zimmermann * struct drm_vram_mm - An instance of VRAM MM 1586b5ce4a1SThomas Zimmermann * @vram_base: Base address of the managed video memory 1596b5ce4a1SThomas Zimmermann * @vram_size: Size of the managed video memory in bytes 1606b5ce4a1SThomas Zimmermann * @bdev: The TTM BO device. 1616b5ce4a1SThomas Zimmermann * @funcs: TTM BO functions 1626b5ce4a1SThomas Zimmermann * 1636b5ce4a1SThomas Zimmermann * The fields &struct drm_vram_mm.vram_base and 1646b5ce4a1SThomas Zimmermann * &struct drm_vram_mm.vrm_size are managed by VRAM MM, but are 1656b5ce4a1SThomas Zimmermann * available for public read access. Use the field 1666b5ce4a1SThomas Zimmermann * &struct drm_vram_mm.bdev to access the TTM BO device. 1676b5ce4a1SThomas Zimmermann */ 1686b5ce4a1SThomas Zimmermann struct drm_vram_mm { 1696b5ce4a1SThomas Zimmermann uint64_t vram_base; 1706b5ce4a1SThomas Zimmermann size_t vram_size; 1716b5ce4a1SThomas Zimmermann 1728af8a109SChristian König struct ttm_device bdev; 1736b5ce4a1SThomas Zimmermann }; 1746b5ce4a1SThomas Zimmermann 1756b5ce4a1SThomas Zimmermann /** 1766b5ce4a1SThomas Zimmermann * drm_vram_mm_of_bdev() - \ 1778af8a109SChristian König Returns the container of type &struct ttm_device for field bdev. 1786b5ce4a1SThomas Zimmermann * @bdev: the TTM BO device 1796b5ce4a1SThomas Zimmermann * 1806b5ce4a1SThomas Zimmermann * Returns: 1816b5ce4a1SThomas Zimmermann * The containing instance of &struct drm_vram_mm 1826b5ce4a1SThomas Zimmermann */ 1836b5ce4a1SThomas Zimmermann static inline struct drm_vram_mm *drm_vram_mm_of_bdev( 1848af8a109SChristian König struct ttm_device *bdev) 1856b5ce4a1SThomas Zimmermann { 1866b5ce4a1SThomas Zimmermann return container_of(bdev, struct drm_vram_mm, bdev); 1876b5ce4a1SThomas Zimmermann } 1886b5ce4a1SThomas Zimmermann 1897ce84471SWambui Karuga void drm_vram_mm_debugfs_init(struct drm_minor *minor); 1906b5ce4a1SThomas Zimmermann 1916b5ce4a1SThomas Zimmermann /* 1926b5ce4a1SThomas Zimmermann * Helpers for integration with struct drm_device 1936b5ce4a1SThomas Zimmermann */ 1946b5ce4a1SThomas Zimmermann 1956b5ce4a1SThomas Zimmermann struct drm_vram_mm *drm_vram_helper_alloc_mm( 196b0e40e08SThomas Zimmermann struct drm_device *dev, uint64_t vram_base, size_t vram_size); 1976b5ce4a1SThomas Zimmermann void drm_vram_helper_release_mm(struct drm_device *dev); 1986b5ce4a1SThomas Zimmermann 199a5f23a72SThomas Zimmermann int drmm_vram_helper_init(struct drm_device *dev, uint64_t vram_base, 200a5f23a72SThomas Zimmermann size_t vram_size); 201a5f23a72SThomas Zimmermann 20280f7c3f7SThomas Zimmermann /* 20380f7c3f7SThomas Zimmermann * Mode-config helpers 20480f7c3f7SThomas Zimmermann */ 20580f7c3f7SThomas Zimmermann 20680f7c3f7SThomas Zimmermann enum drm_mode_status 20780f7c3f7SThomas Zimmermann drm_vram_helper_mode_valid(struct drm_device *dev, 20880f7c3f7SThomas Zimmermann const struct drm_display_mode *mode); 20980f7c3f7SThomas Zimmermann 21085438a8dSThomas Zimmermann #endif 211