diff options
Diffstat (limited to 'linux-core/ati_pcigart.c')
| -rw-r--r-- | linux-core/ati_pcigart.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/linux-core/ati_pcigart.c b/linux-core/ati_pcigart.c index 524618a8..66742bbc 100644 --- a/linux-core/ati_pcigart.c +++ b/linux-core/ati_pcigart.c @@ -238,3 +238,148 @@ int drm_ati_pcigart_init(drm_device_t *dev, drm_ati_pcigart_info *gart_info) return ret; } EXPORT_SYMBOL(drm_ati_pcigart_init); + +static int ati_pcigart_needs_unbind_cache_adjust(drm_ttm_backend_t *backend) +{ + return ((backend->flags & DRM_BE_FLAG_BOUND_CACHED) ? 0 : 1); +} + +void ati_pcigart_alloc_page_array(size_t size, struct ati_pcigart_memory *mem) +{ + mem->memory = NULL; + mem->flags = 0; + + if (size <= 2*PAGE_SIZE) + mem->memory = kmalloc(size, GFP_KERNEL | __GFP_NORETRY); + if (mem->memory == NULL) { + mem->memory = vmalloc(size); + mem->flags |= ATI_PCIGART_FLAG_VMALLOC; + } +} + +static int ati_pcigart_populate(drm_ttm_backend_t *backend, + unsigned long num_pages, + struct page **pages) +{ + ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private; + struct page **cur_page, **last_page = pages + num_pages; + struct ati_pcigart_memory *mem; + unsigned long alloc_size = num_pages * sizeof(struct page *); + + DRM_DEBUG("%d\n", num_pages); + if (drm_alloc_memctl(num_pages * sizeof(void *))) + return -1; + + mem = drm_alloc(sizeof(struct ati_pcigart_memory), DRM_MEM_MAPPINGS); + if (!mem) { + drm_free_memctl(num_pages * sizeof(void *)); + return -1; + } + + ati_pcigart_alloc_page_array(alloc_size, mem); + mem->page_count = 0; + for (cur_page = pages; cur_page < last_page; ++cur_page) { + mem->memory[mem->page_count++] = page_to_phys(*cur_page); + } + atipci_priv->mem = mem; + return 0; +} + +static int ati_pcigart_bind_ttm(drm_ttm_backend_t *backend, + unsigned long offset, + int cached) +{ + ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private; + struct ati_pcigart_memory *mem = atipci_priv->mem; + off_t j; + + j = offset; + while (j < (pg_start + mem->page_count)) { + j++; + } + + for (i = 0, j = offset; i < mem->page_count; i++, j++) { + /* write value */ + } + + /* need to traverse table and add entries */ + DRM_DEBUG("\n"); + return -1; +} + +static int ati_pcigart_unbind_ttm(drm_ttm_backend_t *backend) +{ + ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private; + + DRM_DEBUG("\n"); + return -1; +} + +static void ati_pcigart_clear_ttm(drm_ttm_backend_t *backend) +{ + ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private; + struct ati_pcigart_memory *mem = atipci_priv->mem; + + DRM_DEBUG("\n"); + if (mem) { + unsigned long num_pages = mem->page_count; + backend->unbind(backend); + /* free test */ + drm_free(mem, sizeof(struct ati_pcigart_memory), DRM_MEM_MAPPINGS); + drm_free_memctl(num_pages * sizeof(void *)); + } + atipci_priv->mem = NULL; +} + +static void ati_pcigart_destroy_ttm(drm_ttm_backend_t *backend) +{ + ati_pcigart_ttm_priv *atipci_priv; + + if (backend) { + DRM_DEBUG("\n"); + atipci_priv = (ati_pcigart_ttm_priv *)backend->private; + if (atipci_priv) { + if (atipci_priv->mem) { + backend->clear(backend); + } + drm_ctl_free(atipci_priv, sizeof(*atipci_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 *ati_pcigart_init_ttm(struct drm_device *dev, + drm_ttm_backend_t *backend) +{ + drm_ttm_backend_t *atipci_be; + ati_pcigart_ttm_priv *atipci_priv; + + atipci_be = (backend != NULL) ? backend : + drm_ctl_calloc(1, sizeof (*atipci_be), DRM_MEM_MAPPINGS); + + if (!atipci_be) + return NULL; + + atipci_priv = drm_ctl_calloc(1, sizeof(*atipci_priv), DRM_MEM_MAPPINGS); + if (!atipci_priv) { + drm_ctl_free(atipci_be, sizeof(*atipci_be), DRM_MEM_MAPPINGS); + return NULL; + } + + atipci_priv->populated = FALSE; + atipci_be->needs_ub_cache_adjust = ati_pcigart_needs_unbind_cache_adjust; + atipci_be->populate = ati_pcigart_populate; + atipci_be->clear = ati_pcigart_clear_ttm; + atipci_be->bind = ati_pcigart_bind_ttm; + atipci_be->unbind = ati_pcigart_unbind_ttm; + atipci_be->destroy = ati_pcigart_destroy_ttm; + + DRM_FLAG_MASKED(atipci_be->flags, (backend == NULL) ? DRM_BE_FLAG_NEEDS_FREE : 0, DRM_BE_FLAG_NEEDS_FREE); + atipci_be->drm_map_type = _DRM_SCATTER_GATHER; + return atipci_be; +} +EXPORT_SYMBOL(ati_pcigart_init_ttm); |