| /* |
| * Copyright 2014 Canonical |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Andreas Pokorny |
| */ |
| |
| #include <drm/ttm/ttm_page_alloc.h> |
| #include "virtgpu_drv.h" |
| |
| struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *gobj) |
| { |
| struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gobj); |
| unsigned long npages = obj->tbo.num_pages; |
| |
| return drm_prime_pages_to_sg(obj->tbo.ttm->pages, npages); |
| } |
| |
| void *virtgpu_gem_prime_vmap(struct drm_gem_object *gobj) |
| { |
| struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gobj); |
| int ret; |
| |
| ret = ttm_bo_kmap(&obj->tbo, 0, obj->tbo.num_pages, |
| &obj->dma_buf_vmap); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| return obj->dma_buf_vmap.virtual; |
| } |
| |
| void virtgpu_gem_prime_vunmap(struct drm_gem_object *gobj, void *vaddr) |
| { |
| struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gobj); |
| |
| ttm_bo_kunmap(&obj->dma_buf_vmap); |
| } |
| |
| int virtgpu_gem_prime_mmap(struct drm_gem_object *gobj, |
| struct vm_area_struct *vma) |
| { |
| struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gobj); |
| int ret = 0; |
| |
| /* |
| * ttm_fbdev_mmap() returns -EACCESS unless vma->vm_pgoff is 0. |
| * vma->vm_pgoff is tentatively set to 0 and updated after |
| * ttm_fbdev_mmap(). |
| */ |
| unsigned long pgoff = vma->vm_pgoff; |
| |
| vma->vm_pgoff = 0; |
| ret = ttm_fbdev_mmap(vma, &obj->tbo); |
| |
| /* |
| * TTM does the real mapping via its page fault handler, |
| * ttm_bo_vm_fault(), which handles vma->vm_pgoff correctly. |
| */ |
| vma->vm_pgoff = pgoff + drm_vma_node_start(&obj->tbo.vma_node); |
| |
| return ret; |
| } |