diff options
Diffstat (limited to 'linux-core/drm_agpsupport.c')
| -rw-r--r-- | linux-core/drm_agpsupport.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/linux-core/drm_agpsupport.c b/linux-core/drm_agpsupport.c index dce27cdf..a5f1f9ee 100644 --- a/linux-core/drm_agpsupport.c +++ b/linux-core/drm_agpsupport.c @@ -552,4 +552,162 @@ int drm_agp_unbind_memory(DRM_AGP_MEM * handle) return agp_unbind_memory(handle); } + + +/* + * AGP ttm backend interface. + */ + +#ifndef AGP_USER_TYPES +#define AGP_USER_TYPES (1 << 16) +#define AGP_USER_MEMORY (AGP_USER_TYPES) +#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1) +#endif + +static int drm_agp_needs_unbind_cache_adjust(drm_ttm_backend_t *backend) { + return ((backend->flags & DRM_BE_FLAG_BOUND_CACHED) ? 0 : 1); +} + + +static int drm_agp_populate(drm_ttm_backend_t *backend, unsigned long num_pages, + struct page **pages) { + + drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private; + struct page **cur_page, **last_page = pages + num_pages; + DRM_AGP_MEM *mem; + + if (drm_alloc_memctl(num_pages * sizeof(void *))) + return -1; + + DRM_DEBUG("drm_agp_populate_ttm\n"); +#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11) + mem = drm_agp_allocate_memory(num_pages, agp_priv->alloc_type); +#else + mem = drm_agp_allocate_memory(agp_priv->bridge, num_pages, agp_priv->alloc_type); +#endif + if (!mem) { + drm_free_memctl(num_pages *sizeof(void *)); + return -1; + } + + DRM_DEBUG("Current page count is %ld\n", (long) mem->page_count); + mem->page_count = 0; + for (cur_page = pages; cur_page < last_page; ++cur_page) { + mem->memory[mem->page_count++] = phys_to_gart(page_to_phys(*cur_page)); + } + agp_priv->mem = mem; + return 0; +} + +static int drm_agp_bind_ttm(drm_ttm_backend_t *backend, + unsigned long offset, + int cached) +{ + drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private; + DRM_AGP_MEM *mem = agp_priv->mem; + int ret; + + DRM_DEBUG("drm_agp_bind_ttm\n"); + DRM_MASK_VAL(backend->flags, DRM_BE_FLAG_BOUND_CACHED, + (cached) ? DRM_BE_FLAG_BOUND_CACHED : 0); + mem->is_flushed = TRUE; + mem->type = (cached) ? agp_priv->cached_type : agp_priv->uncached_type; + ret = drm_agp_bind_memory(mem, offset); + if (ret) { + DRM_ERROR("AGP Bind memory failed\n"); + } + return ret; +} + +static int drm_agp_unbind_ttm(drm_ttm_backend_t *backend) { + + drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private; + + DRM_DEBUG("drm_agp_unbind_ttm\n"); + if (agp_priv->mem->is_bound) + return drm_agp_unbind_memory(agp_priv->mem); + else + return 0; +} + +static void drm_agp_clear_ttm(drm_ttm_backend_t *backend) { + + drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private; + DRM_AGP_MEM *mem = agp_priv->mem; + + DRM_DEBUG("drm_agp_clear_ttm\n"); + if (mem) { + unsigned long num_pages = mem->page_count; + backend->unbind(backend); + agp_free_memory(mem); + drm_free_memctl(num_pages *sizeof(void *)); + } + + agp_priv->mem = NULL; +} + +static void drm_agp_destroy_ttm(drm_ttm_backend_t *backend) { + + drm_agp_ttm_priv *agp_priv; + + if (backend) { + DRM_DEBUG("drm_agp_destroy_ttm\n"); + agp_priv = (drm_agp_ttm_priv *) backend->private; + if (agp_priv) { + if (agp_priv->mem) { + backend->clear(backend); + } + drm_ctl_free(agp_priv, sizeof(*agp_priv), DRM_MEM_MAPPINGS); + backend->private = NULL; + } + if (backend->flags & DRM_BE_FLAG_NEEDS_FREE) { + drm_ctl_free(backend, sizeof(*backend), DRM_MEM_MAPPINGS); + } + } +} + + +drm_ttm_backend_t *drm_agp_init_ttm(struct drm_device *dev, + drm_ttm_backend_t *backend) +{ + + drm_ttm_backend_t *agp_be; + drm_agp_ttm_priv *agp_priv; + + agp_be = (backend != NULL) ? backend: + drm_ctl_calloc(1, sizeof(*agp_be), DRM_MEM_MAPPINGS); + + if (!agp_be) + return NULL; + + agp_priv = drm_ctl_calloc(1, sizeof(*agp_priv), DRM_MEM_MAPPINGS); + + if (!agp_priv) { + drm_ctl_free(agp_be, sizeof(*agp_be), DRM_MEM_MAPPINGS); + return NULL; + } + + agp_priv->mem = NULL; + agp_priv->alloc_type = AGP_USER_MEMORY; + agp_priv->cached_type = AGP_USER_CACHED_MEMORY; + agp_priv->uncached_type = AGP_USER_MEMORY; + agp_priv->bridge = dev->agp->bridge; + agp_priv->populated = FALSE; + agp_be->aperture_base = dev->agp->agp_info.aper_base; + agp_be->private = (void *) agp_priv; + agp_be->needs_ub_cache_adjust = drm_agp_needs_unbind_cache_adjust; + agp_be->populate = drm_agp_populate; + agp_be->clear = drm_agp_clear_ttm; + agp_be->bind = drm_agp_bind_ttm; + agp_be->unbind = drm_agp_unbind_ttm; + agp_be->destroy = drm_agp_destroy_ttm; + DRM_MASK_VAL(agp_be->flags, DRM_BE_FLAG_NEEDS_FREE, + (backend == NULL) ? DRM_BE_FLAG_NEEDS_FREE : 0); + DRM_MASK_VAL(agp_be->flags, DRM_BE_FLAG_CBA, + (dev->agp->cant_use_aperture) ? DRM_BE_FLAG_CBA : 0); + agp_be->drm_map_type = _DRM_AGP; + return agp_be; +} +EXPORT_SYMBOL(drm_agp_init_ttm); + #endif /* __OS_HAS_AGP */ |