mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 09:42:17 +07:00
e32681d66d
The driver uses GEM along with a couple of small bits of wrapping of its own. The only real oddity here is the support for using the 'stolen' memory rather than wasting several MB. We use a simple resource manager as we don't need to manage our space intensively at all as we only do 2D work. We also have a GTT which is entirely GPU facing so in the Cedarview case are not even allocating from host address space. Signed-off-by: Alan Cox <alan@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/**************************************************************************
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* Copyright (c) 2011, Intel Corporation.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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**************************************************************************/
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#include <drm/drmP.h>
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#include <drm/drm.h>
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void drm_gem_object_release_wrap(struct drm_gem_object *obj)
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{
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/* Remove the list map if one is present */
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if (obj->map_list.map) {
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struct drm_gem_mm *mm = obj->dev->mm_private;
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struct drm_map_list *list = &obj->map_list;
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drm_ht_remove_item(&mm->offset_hash, &list->hash);
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drm_mm_put_block(list->file_offset_node);
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kfree(list->map);
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list->map = NULL;
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}
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drm_gem_object_release(obj);
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}
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/**
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* gem_create_mmap_offset - invent an mmap offset
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* @obj: our object
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*
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* Standard implementation of offset generation for mmap as is
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* duplicated in several drivers. This belongs in GEM.
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*/
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int gem_create_mmap_offset(struct drm_gem_object *obj)
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{
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struct drm_device *dev = obj->dev;
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struct drm_gem_mm *mm = dev->mm_private;
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struct drm_map_list *list;
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struct drm_local_map *map;
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int ret;
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list = &obj->map_list;
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list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL);
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if (list->map == NULL)
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return -ENOMEM;
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map = list->map;
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map->type = _DRM_GEM;
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map->size = obj->size;
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map->handle = obj;
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list->file_offset_node = drm_mm_search_free(&mm->offset_manager,
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obj->size / PAGE_SIZE, 0, 0);
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if (!list->file_offset_node) {
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dev_err(dev->dev, "failed to allocate offset for bo %d\n",
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obj->name);
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ret = -ENOSPC;
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goto free_it;
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}
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list->file_offset_node = drm_mm_get_block(list->file_offset_node,
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obj->size / PAGE_SIZE, 0);
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if (!list->file_offset_node) {
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ret = -ENOMEM;
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goto free_it;
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}
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list->hash.key = list->file_offset_node->start;
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ret = drm_ht_insert_item(&mm->offset_hash, &list->hash);
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if (ret) {
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dev_err(dev->dev, "failed to add to map hash\n");
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goto free_mm;
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}
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return 0;
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free_mm:
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drm_mm_put_block(list->file_offset_node);
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free_it:
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kfree(list->map);
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list->map = NULL;
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return ret;
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}
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