diff options
Diffstat (limited to 'drivers/staging/omapdrm/omap_gem_helpers.c')
| -rw-r--r-- | drivers/staging/omapdrm/omap_gem_helpers.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/drivers/staging/omapdrm/omap_gem_helpers.c b/drivers/staging/omapdrm/omap_gem_helpers.c deleted file mode 100644 index ffb8cceaeb46..000000000000 --- a/drivers/staging/omapdrm/omap_gem_helpers.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * drivers/staging/omapdrm/omap_gem_helpers.c - * - * Copyright (C) 2011 Texas Instruments - * Author: Rob Clark <rob.clark@linaro.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/* temporary copy of drm_gem_{get,put}_pages() until the - * "drm/gem: add functions to get/put pages" patch is merged.. - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/shmem_fs.h> - -#include <drm/drmP.h> - -/** - * drm_gem_get_pages - helper to allocate backing pages for a GEM object - * @obj: obj in question - * @gfpmask: gfp mask of requested pages - */ -struct page **_drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask) -{ - struct inode *inode; - struct address_space *mapping; - struct page *p, **pages; - int i, npages; - - /* This is the shared memory object that backs the GEM resource */ - inode = obj->filp->f_path.dentry->d_inode; - mapping = inode->i_mapping; - - npages = obj->size >> PAGE_SHIFT; - - pages = drm_malloc_ab(npages, sizeof(struct page *)); - if (pages == NULL) - return ERR_PTR(-ENOMEM); - - gfpmask |= mapping_gfp_mask(mapping); - - for (i = 0; i < npages; i++) { - p = shmem_read_mapping_page_gfp(mapping, i, gfpmask); - if (IS_ERR(p)) - goto fail; - pages[i] = p; - - /* There is a hypothetical issue w/ drivers that require - * buffer memory in the low 4GB.. if the pages are un- - * pinned, and swapped out, they can end up swapped back - * in above 4GB. If pages are already in memory, then - * shmem_read_mapping_page_gfp will ignore the gfpmask, - * even if the already in-memory page disobeys the mask. - * - * It is only a theoretical issue today, because none of - * the devices with this limitation can be populated with - * enough memory to trigger the issue. But this BUG_ON() - * is here as a reminder in case the problem with - * shmem_read_mapping_page_gfp() isn't solved by the time - * it does become a real issue. - * - * See this thread: http://lkml.org/lkml/2011/7/11/238 - */ - BUG_ON((gfpmask & __GFP_DMA32) && - (page_to_pfn(p) >= 0x00100000UL)); - } - - return pages; - -fail: - while (i--) - page_cache_release(pages[i]); - - drm_free_large(pages); - return ERR_CAST(p); -} - -/** - * drm_gem_put_pages - helper to free backing pages for a GEM object - * @obj: obj in question - * @pages: pages to free - */ -void _drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages, - bool dirty, bool accessed) -{ - int i, npages; - - npages = obj->size >> PAGE_SHIFT; - - for (i = 0; i < npages; i++) { - if (dirty) - set_page_dirty(pages[i]); - - if (accessed) - mark_page_accessed(pages[i]); - - /* Undo the reference we took when populating the table */ - page_cache_release(pages[i]); - } - - drm_free_large(pages); -} - -int -_drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size) -{ - struct drm_device *dev = obj->dev; - struct drm_gem_mm *mm = dev->mm_private; - struct drm_map_list *list; - struct drm_local_map *map; - int ret = 0; - - /* Set the object up for mmap'ing */ - list = &obj->map_list; - list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); - if (!list->map) - return -ENOMEM; - - map = list->map; - map->type = _DRM_GEM; - map->size = size; - map->handle = obj; - - /* Get a DRM GEM mmap offset allocated... */ - list->file_offset_node = drm_mm_search_free(&mm->offset_manager, - size / PAGE_SIZE, 0, 0); - - if (!list->file_offset_node) { - DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); - ret = -ENOSPC; - goto out_free_list; - } - - list->file_offset_node = drm_mm_get_block(list->file_offset_node, - size / PAGE_SIZE, 0); - if (!list->file_offset_node) { - ret = -ENOMEM; - goto out_free_list; - } - - list->hash.key = list->file_offset_node->start; - ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); - if (ret) { - DRM_ERROR("failed to add to map hash\n"); - goto out_free_mm; - } - - return 0; - -out_free_mm: - drm_mm_put_block(list->file_offset_node); -out_free_list: - kfree(list->map); - list->map = NULL; - - return ret; -} |