diff options
| author | Dave Airlie <airlied@linux.ie> | 2007-10-30 17:51:59 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@optimus.(none)> | 2007-10-30 17:52:13 +1000 |
| commit | 50dec29c800a6e980a01be38190e44a0ba7916b5 (patch) | |
| tree | 5cf8c466b9497a9176b718452480ad4ecb4d4ec5 /linux-core | |
| parent | ff5889f8316e0c16112f114c1c8f57645b8dc54f (diff) | |
drm/i915: add driver cache flush entry point
Use clflush on Intel hardware to flush cached objects.
Diffstat (limited to 'linux-core')
| -rw-r--r-- | linux-core/drm_objects.h | 1 | ||||
| -rw-r--r-- | linux-core/drm_ttm.c | 7 | ||||
| -rw-r--r-- | linux-core/i915_buffer.c | 33 | ||||
| -rw-r--r-- | linux-core/i915_drv.c | 1 |
4 files changed, 40 insertions, 2 deletions
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h index 8b14ac6f..cea811eb 100644 --- a/linux-core/drm_objects.h +++ b/linux-core/drm_objects.h @@ -464,6 +464,7 @@ struct drm_bo_driver { uint32_t(*evict_mask) (struct drm_buffer_object *bo); int (*move) (struct drm_buffer_object * bo, int evict, int no_wait, struct drm_bo_mem_reg * new_mem); + void (*ttm_cache_flush)(struct drm_ttm *ttm); }; /* diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c index 33bbe1d4..df9e7e44 100644 --- a/linux-core/drm_ttm.c +++ b/linux-core/drm_ttm.c @@ -207,6 +207,7 @@ struct page *drm_ttm_get_page(struct drm_ttm * ttm, int index) } return p; } +EXPORT_SYMBOL(drm_ttm_get_page); int drm_ttm_populate(struct drm_ttm * ttm) { @@ -311,7 +312,7 @@ void drm_ttm_unbind(struct drm_ttm * ttm) int drm_bind_ttm(struct drm_ttm * ttm, struct drm_bo_mem_reg *bo_mem) { - + struct drm_bo_driver *bo_driver = ttm->dev->driver->bo_driver; int ret = 0; struct drm_ttm_backend *be; @@ -328,7 +329,9 @@ int drm_bind_ttm(struct drm_ttm * ttm, struct drm_bo_mem_reg *bo_mem) if (ttm->state == ttm_unbound && !(bo_mem->flags & DRM_BO_FLAG_CACHED)) { drm_set_caching(ttm, DRM_TTM_PAGE_UNCACHED); - } + } else if ((bo_mem->flags & DRM_BO_FLAG_CACHED) && + bo_driver->ttm_cache_flush) + bo_driver->ttm_cache_flush(ttm); if ((ret = be->func->bind(be, bo_mem))) { ttm->state = ttm_evicted; diff --git a/linux-core/i915_buffer.c b/linux-core/i915_buffer.c index f81def8f..bbc7e1db 100644 --- a/linux-core/i915_buffer.c +++ b/linux-core/i915_buffer.c @@ -249,3 +249,36 @@ int i915_move(struct drm_buffer_object * bo, } return 0; } + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)) +static inline void clflush(volatile void *__p) +{ + asm volatile("clflush %0" : "+m" (*(char __force *)__p)); +} +#endif + +static inline void drm_cache_flush_addr(void *virt) +{ + int i; + + for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size) + clflush(virt+i); +} + +static inline void drm_cache_flush_page(struct page *p) +{ + drm_cache_flush_addr(page_address(p)); +} + +void i915_flush_ttm(struct drm_ttm *ttm) +{ + int i; + + if (!ttm) + return; + + DRM_MEMORYBARRIER(); + for (i = ttm->num_pages-1; i >= 0; i--) + drm_cache_flush_page(drm_ttm_get_page(ttm, i)); + DRM_MEMORYBARRIER(); +} diff --git a/linux-core/i915_drv.c b/linux-core/i915_drv.c index f34d218c..124db68f 100644 --- a/linux-core/i915_drv.c +++ b/linux-core/i915_drv.c @@ -66,6 +66,7 @@ static struct drm_bo_driver i915_bo_driver = { .init_mem_type = i915_init_mem_type, .evict_mask = i915_evict_mask, .move = i915_move, + .ttm_cache_flush = i915_flush_ttm, }; #endif |