| /************************************************************************** |
| * |
| * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * |
| **************************************************************************/ |
| /* |
| * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com> |
| */ |
| |
| #ifndef _DRM_TTM_H |
| #define _DRM_TTM_H |
| #define DRM_HAS_TTM |
| |
| /* |
| * The backend GART interface. (In our case AGP). Any similar type of device (PCIE?) |
| * needs only to implement these functions to be usable with the "TTM" interface. |
| * The AGP backend implementation lives in drm_agpsupport.c |
| * basically maps these calls to available functions in agpgart. Each drm device driver gets an |
| * additional function pointer that creates these types, |
| * so that the device can choose the correct aperture. |
| * (Multiple AGP apertures, etc.) |
| * Most device drivers will let this point to the standard AGP implementation. |
| */ |
| |
| #define DRM_BE_FLAG_NEEDS_FREE 0x00000001 |
| #define DRM_BE_FLAG_BOUND_CACHED 0x00000002 |
| #define DRM_BE_FLAG_CBA 0x00000004 |
| |
| typedef struct drm_ttm_backend { |
| unsigned long aperture_base; |
| void *private; |
| uint32_t flags; |
| uint32_t drm_map_type; |
| int (*needs_ub_cache_adjust) (struct drm_ttm_backend * backend); |
| int (*populate) (struct drm_ttm_backend * backend, |
| unsigned long num_pages, struct page ** pages); |
| void (*clear) (struct drm_ttm_backend * backend); |
| int (*bind) (struct drm_ttm_backend * backend, |
| unsigned long offset, int cached); |
| int (*unbind) (struct drm_ttm_backend * backend); |
| void (*destroy) (struct drm_ttm_backend * backend); |
| } drm_ttm_backend_t; |
| |
| typedef struct drm_ttm { |
| struct page **pages; |
| uint32_t page_flags; |
| unsigned long num_pages; |
| unsigned long aper_offset; |
| atomic_t vma_count; |
| struct drm_device *dev; |
| int destroy; |
| uint32_t mapping_offset; |
| drm_ttm_backend_t *be; |
| enum { |
| ttm_bound, |
| ttm_evicted, |
| ttm_unbound, |
| ttm_unpopulated, |
| } state; |
| #ifdef DRM_ODD_MM_COMPAT |
| struct list_head vma_list; |
| struct list_head p_mm_list; |
| #endif |
| |
| } drm_ttm_t; |
| |
| typedef struct drm_ttm_object { |
| atomic_t usage; |
| uint32_t flags; |
| drm_map_list_t map_list; |
| } drm_ttm_object_t; |
| |
| extern int drm_ttm_object_create(struct drm_device *dev, unsigned long size, |
| uint32_t flags, |
| drm_ttm_object_t ** ttm_object); |
| extern void drm_ttm_object_deref_locked(struct drm_device *dev, |
| drm_ttm_object_t * to); |
| extern void drm_ttm_object_deref_unlocked(struct drm_device *dev, |
| drm_ttm_object_t * to); |
| extern drm_ttm_object_t *drm_lookup_ttm_object(drm_file_t * priv, |
| uint32_t handle, |
| int check_owner); |
| extern int drm_bind_ttm(drm_ttm_t * ttm, int cached, unsigned long aper_offset); |
| |
| extern int drm_unbind_ttm(drm_ttm_t * ttm); |
| |
| /* |
| * Evict a ttm region. Keeps Aperture caching policy. |
| */ |
| |
| extern int drm_evict_ttm(drm_ttm_t * ttm); |
| extern void drm_fixup_ttm_caching(drm_ttm_t * ttm); |
| |
| /* |
| * Destroy a ttm. The user normally calls drmRmMap or a similar IOCTL to do this, |
| * which calls this function iff there are no vmas referencing it anymore. Otherwise it is called |
| * when the last vma exits. |
| */ |
| |
| extern int drm_destroy_ttm(drm_ttm_t * ttm); |
| extern int drm_ttm_ioctl(DRM_IOCTL_ARGS); |
| |
| static __inline__ drm_ttm_t *drm_ttm_from_object(drm_ttm_object_t * to) |
| { |
| return (drm_ttm_t *) to->map_list.map->offset; |
| } |
| |
| #define DRM_MASK_VAL(dest, mask, val) \ |
| (dest) = ((dest) & ~(mask)) | ((val) & (mask)); |
| |
| #define DRM_TTM_MASK_FLAGS ((1 << PAGE_SHIFT) - 1) |
| #define DRM_TTM_MASK_PFN (0xFFFFFFFFU - DRM_TTM_MASK_FLAGS) |
| |
| /* |
| * Page flags. |
| */ |
| |
| #define DRM_TTM_PAGE_UNCACHED 0x01 |
| #define DRM_TTM_PAGE_USED 0x02 |
| #define DRM_TTM_PAGE_BOUND 0x04 |
| #define DRM_TTM_PAGE_PRESENT 0x08 |
| #define DRM_TTM_PAGE_VMALLOC 0x10 |
| |
| #endif |