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/**************************************************************************
*
* 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.
*/
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 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);
/*
* 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
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