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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.
*/
#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
#endif
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