/************************************************************************** * * 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 */ #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. */ typedef struct drm_ttm_backend { unsigned long aperture_base; void *private; int (*needs_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 (*unbind) (struct drm_ttm_backend * backend); void (*destroy) (struct drm_ttm_backend * backend); } drm_ttm_backend_t; #define DRM_FLUSH_READ (0x01) #define DRM_FLUSH_WRITE (0x02) #define DRM_FLUSH_EXE (0x04) typedef struct drm_ttm_backend_list { uint32_t flags; struct list_head head; drm_ttm_backend_t *be; unsigned page_offset; unsigned num_pages; struct drm_ttm *owner; drm_file_t *anon_owner; struct page **anon_pages; int anon_locked; enum { ttm_bound, ttm_evicted, ttm_unbound } state; } drm_ttm_backend_list_t; typedef struct drm_ttm_vma_list { struct list_head head; pgprot_t orig_protection; struct vm_area_struct *vma; drm_map_t *map; } drm_ttm_vma_list_t; typedef struct drm_ttm { struct list_head p_mm_list; atomic_t shared_count; uint32_t mm_list_seq; unsigned long aperture_base; struct page **pages; uint32_t *page_flags; unsigned long lhandle; unsigned long num_pages; drm_ttm_vma_list_t *vma_list; struct drm_device *dev; drm_ttm_backend_list_t *be_list; atomic_t vma_count; int mmap_sem_locked; int destroy; } drm_ttm_t; typedef struct drm_ttm_object { drm_user_object_t base; 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 drm_ttm_object_t *drm_lookup_ttm_object(drm_file_t *priv, uint32_t handle, int check_owner); /* * Bind a part of the ttm starting at page_offset size n_pages into the GTT, at * aperture offset aper_offset. The region handle will be used to reference this * bound region in the future. Note that the region may be the whole ttm. * Regions should not overlap. * This function sets all affected pages as noncacheable and flushes cashes and TLB. */ int drm_create_ttm_region(drm_ttm_t * ttm, unsigned long page_offset, unsigned long n_pages, int cached, drm_ttm_backend_list_t ** region); int drm_bind_ttm_region(drm_ttm_backend_list_t * region, unsigned long aper_offset); /* * Unbind a ttm region. Restores caching policy. Flushes caches and TLB. */ void drm_unbind_ttm_region(drm_ttm_backend_list_t * entry); void drm_destroy_ttm_region(drm_ttm_backend_list_t * entry); /* * Evict a ttm region. Keeps Aperture caching policy. */ int drm_evict_ttm_region(drm_ttm_backend_list_t * entry); /* * Rebind an already evicted region into a possibly new location in the aperture. */ int drm_rebind_ttm_region(drm_ttm_backend_list_t * entry, unsigned long aper_offset); /* * 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 void drm_user_destroy_region(drm_ttm_backend_list_t * entry); extern int drm_ttm_add_mm_to_list(drm_ttm_t * ttm, struct mm_struct *mm); extern void drm_ttm_delete_mm(drm_ttm_t * ttm, struct mm_struct *mm); 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 #endif