116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*
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* Copyright © 2012 Intel Corporation
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* Copyright © 2014 The Chromium OS Authors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Ben Widawsky <ben@bwidawsk.net>
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*
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*/
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#include <linux/dma-buf.h>
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#include "vgem_drv.h"
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#define VGEM_FD_PERMS 0600
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struct sg_table *vgem_gem_prime_get_sg_table(struct drm_gem_object *gobj)
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{
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struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
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BUG_ON(obj->pages == NULL);
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return drm_prime_pages_to_sg(obj->pages, obj->base.size / PAGE_SIZE);
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}
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int vgem_gem_prime_pin(struct drm_gem_object *gobj)
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{
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struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
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return vgem_gem_get_pages(obj);
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}
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void *vgem_gem_prime_vmap(struct drm_gem_object *gobj)
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{
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struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
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BUG_ON(obj->pages == NULL);
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return vmap(obj->pages, obj->base.size / PAGE_SIZE, 0, PAGE_KERNEL);
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}
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void vgem_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
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{
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vunmap(vaddr);
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}
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int vgem_gem_prime_mmap(struct drm_gem_object *gobj,
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struct vm_area_struct *vma)
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{
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struct drm_device *dev = gobj->dev;
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struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
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int ret;
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mutex_lock(&dev->struct_mutex);
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ret = vgem_gem_get_pages(obj);
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if (ret)
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goto out_unlock;
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ret = drm_gem_mmap_obj(gobj, gobj->size, vma);
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if (ret < 0)
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goto out_unlock;
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vma->vm_flags |= VM_MIXEDMAP;
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vma->vm_flags &= ~VM_PFNMAP;
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mutex_unlock(&dev->struct_mutex);
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return 0;
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out_unlock:
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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struct drm_gem_object *
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vgem_gem_prime_import_sg_table(struct drm_device *dev,
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size_t size,
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struct sg_table *sg)
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{
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struct drm_vgem_gem_object *obj = NULL;
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int ret;
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obj = kzalloc(sizeof(*obj), GFP_KERNEL);
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if (obj == NULL) {
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ret = -ENOMEM;
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goto fail;
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}
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ret = drm_gem_object_init(dev, &obj->base, size);
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if (ret) {
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ret = -ENOMEM;
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goto fail_free;
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}
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return &obj->base;
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fail_free:
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kfree(obj);
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fail:
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return ERR_PTR(ret);
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}
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