1 /* 2 * Copyright (C) 2013 Red Hat 3 * Author: Rob Clark <robdclark@gmail.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include "msm_drv.h" 19 #include "msm_gem.h" 20 21 #include <linux/dma-buf.h> 22 23 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj) 24 { 25 struct msm_gem_object *msm_obj = to_msm_bo(obj); 26 int npages = obj->size >> PAGE_SHIFT; 27 28 if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */ 29 return NULL; 30 31 return drm_prime_pages_to_sg(msm_obj->pages, npages); 32 } 33 34 void *msm_gem_prime_vmap(struct drm_gem_object *obj) 35 { 36 return msm_gem_vaddr(obj); 37 } 38 39 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 40 { 41 /* TODO msm_gem_vunmap() */ 42 } 43 44 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 45 { 46 int ret; 47 48 mutex_lock(&obj->dev->struct_mutex); 49 ret = drm_gem_mmap_obj(obj, obj->size, vma); 50 mutex_unlock(&obj->dev->struct_mutex); 51 if (ret < 0) 52 return ret; 53 54 return msm_gem_mmap_obj(vma->vm_private_data, vma); 55 } 56 57 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev, 58 struct dma_buf_attachment *attach, struct sg_table *sg) 59 { 60 return msm_gem_import(dev, attach->dmabuf->size, sg); 61 } 62 63 int msm_gem_prime_pin(struct drm_gem_object *obj) 64 { 65 if (!obj->import_attach) 66 msm_gem_get_pages(obj); 67 return 0; 68 } 69 70 void msm_gem_prime_unpin(struct drm_gem_object *obj) 71 { 72 if (!obj->import_attach) 73 msm_gem_put_pages(obj); 74 } 75