1 /* 2 * Copyright 2014 Canonical 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Andreas Pokorny 23 */ 24 25 #include <drm/drm_prime.h> 26 27 #include "virtgpu_drv.h" 28 29 /* Empty Implementations as there should not be any other driver for a virtual 30 * device that might share buffers with virtgpu 31 */ 32 33 struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj) 34 { 35 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); 36 37 if (!bo->tbo.ttm->pages || !bo->tbo.ttm->num_pages) 38 /* should not happen */ 39 return ERR_PTR(-EINVAL); 40 41 return drm_prime_pages_to_sg(bo->tbo.ttm->pages, 42 bo->tbo.ttm->num_pages); 43 } 44 45 struct drm_gem_object *virtgpu_gem_prime_import_sg_table( 46 struct drm_device *dev, struct dma_buf_attachment *attach, 47 struct sg_table *table) 48 { 49 return ERR_PTR(-ENODEV); 50 } 51 52 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj) 53 { 54 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); 55 int ret; 56 57 ret = virtio_gpu_object_kmap(bo); 58 if (ret) 59 return NULL; 60 return bo->vmap; 61 } 62 63 void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 64 { 65 virtio_gpu_object_kunmap(gem_to_virtio_gpu_obj(obj)); 66 } 67 68 int virtgpu_gem_prime_mmap(struct drm_gem_object *obj, 69 struct vm_area_struct *vma) 70 { 71 return drm_gem_prime_mmap(obj, vma); 72 } 73