1254885Sdumbbell/* 2254885Sdumbbell * Copyright 2012 Advanced Micro Devices, Inc. 3254885Sdumbbell * 4254885Sdumbbell * Permission is hereby granted, free of charge, to any person obtaining a 5254885Sdumbbell * copy of this software and associated documentation files (the "Software"), 6254885Sdumbbell * to deal in the Software without restriction, including without limitation 7254885Sdumbbell * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8254885Sdumbbell * and/or sell copies of the Software, and to permit persons to whom the 9254885Sdumbbell * Software is furnished to do so, subject to the following conditions: 10254885Sdumbbell * 11254885Sdumbbell * The above copyright notice and this permission notice shall be included in 12254885Sdumbbell * all copies or substantial portions of the Software. 13254885Sdumbbell * 14254885Sdumbbell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15254885Sdumbbell * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16254885Sdumbbell * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17254885Sdumbbell * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18254885Sdumbbell * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19254885Sdumbbell * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20254885Sdumbbell * OTHER DEALINGS IN THE SOFTWARE. 21254885Sdumbbell * 22254885Sdumbbell * based on nouveau_prime.c 23254885Sdumbbell * 24254885Sdumbbell * Authors: Alex Deucher 25254885Sdumbbell */ 26254885Sdumbbell 27254885Sdumbbell#include <sys/cdefs.h> 28254885Sdumbbell__FBSDID("$FreeBSD$"); 29254885Sdumbbell 30254885Sdumbbell#include <drm/drmP.h> 31254885Sdumbbell 32254885Sdumbbell#include "radeon.h" 33254885Sdumbbell#include <drm/radeon_drm.h> 34254885Sdumbbell 35254885Sdumbbell#include <linux/dma-buf.h> 36254885Sdumbbell 37254885Sdumbbellstatic struct sg_table *radeon_gem_map_dma_buf(struct dma_buf_attachment *attachment, 38254885Sdumbbell enum dma_data_direction dir) 39254885Sdumbbell{ 40254885Sdumbbell struct radeon_bo *bo = attachment->dmabuf->priv; 41254885Sdumbbell struct drm_device *dev = bo->rdev->ddev; 42254885Sdumbbell int npages = bo->tbo.num_pages; 43254885Sdumbbell struct sg_table *sg; 44254885Sdumbbell int nents; 45254885Sdumbbell 46254885Sdumbbell mutex_lock(&dev->struct_mutex); 47254885Sdumbbell sg = drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); 48254885Sdumbbell nents = dma_map_sg(attachment->dev, sg->sgl, sg->nents, dir); 49254885Sdumbbell mutex_unlock(&dev->struct_mutex); 50254885Sdumbbell return sg; 51254885Sdumbbell} 52254885Sdumbbell 53254885Sdumbbellstatic void radeon_gem_unmap_dma_buf(struct dma_buf_attachment *attachment, 54254885Sdumbbell struct sg_table *sg, enum dma_data_direction dir) 55254885Sdumbbell{ 56254885Sdumbbell dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir); 57254885Sdumbbell sg_free_table(sg); 58254885Sdumbbell kfree(sg); 59254885Sdumbbell} 60254885Sdumbbell 61254885Sdumbbellstatic void radeon_gem_dmabuf_release(struct dma_buf *dma_buf) 62254885Sdumbbell{ 63254885Sdumbbell struct radeon_bo *bo = dma_buf->priv; 64254885Sdumbbell 65254885Sdumbbell if (bo->gem_base.export_dma_buf == dma_buf) { 66254885Sdumbbell DRM_ERROR("unreference dmabuf %p\n", &bo->gem_base); 67254885Sdumbbell bo->gem_base.export_dma_buf = NULL; 68254885Sdumbbell drm_gem_object_unreference_unlocked(&bo->gem_base); 69254885Sdumbbell } 70254885Sdumbbell} 71254885Sdumbbell 72254885Sdumbbellstatic void *radeon_gem_kmap_atomic(struct dma_buf *dma_buf, unsigned long page_num) 73254885Sdumbbell{ 74254885Sdumbbell return NULL; 75254885Sdumbbell} 76254885Sdumbbell 77254885Sdumbbellstatic void radeon_gem_kunmap_atomic(struct dma_buf *dma_buf, unsigned long page_num, void *addr) 78254885Sdumbbell{ 79254885Sdumbbell 80254885Sdumbbell} 81254885Sdumbbellstatic void *radeon_gem_kmap(struct dma_buf *dma_buf, unsigned long page_num) 82254885Sdumbbell{ 83254885Sdumbbell return NULL; 84254885Sdumbbell} 85254885Sdumbbell 86254885Sdumbbellstatic void radeon_gem_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr) 87254885Sdumbbell{ 88254885Sdumbbell 89254885Sdumbbell} 90254885Sdumbbell 91254885Sdumbbellstatic int radeon_gem_prime_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) 92254885Sdumbbell{ 93254885Sdumbbell return -EINVAL; 94254885Sdumbbell} 95254885Sdumbbell 96254885Sdumbbellstatic void *radeon_gem_prime_vmap(struct dma_buf *dma_buf) 97254885Sdumbbell{ 98254885Sdumbbell struct radeon_bo *bo = dma_buf->priv; 99254885Sdumbbell struct drm_device *dev = bo->rdev->ddev; 100254885Sdumbbell int ret; 101254885Sdumbbell 102254885Sdumbbell mutex_lock(&dev->struct_mutex); 103254885Sdumbbell if (bo->vmapping_count) { 104254885Sdumbbell bo->vmapping_count++; 105254885Sdumbbell goto out_unlock; 106254885Sdumbbell } 107254885Sdumbbell 108254885Sdumbbell ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, 109254885Sdumbbell &bo->dma_buf_vmap); 110254885Sdumbbell if (ret) { 111254885Sdumbbell mutex_unlock(&dev->struct_mutex); 112254885Sdumbbell return ERR_PTR(ret); 113254885Sdumbbell } 114254885Sdumbbell bo->vmapping_count = 1; 115254885Sdumbbellout_unlock: 116254885Sdumbbell mutex_unlock(&dev->struct_mutex); 117254885Sdumbbell return bo->dma_buf_vmap.virtual; 118254885Sdumbbell} 119254885Sdumbbell 120254885Sdumbbellstatic void radeon_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr) 121254885Sdumbbell{ 122254885Sdumbbell struct radeon_bo *bo = dma_buf->priv; 123254885Sdumbbell struct drm_device *dev = bo->rdev->ddev; 124254885Sdumbbell 125254885Sdumbbell mutex_lock(&dev->struct_mutex); 126254885Sdumbbell bo->vmapping_count--; 127254885Sdumbbell if (bo->vmapping_count == 0) { 128254885Sdumbbell ttm_bo_kunmap(&bo->dma_buf_vmap); 129254885Sdumbbell } 130254885Sdumbbell mutex_unlock(&dev->struct_mutex); 131254885Sdumbbell} 132254885Sdumbbellconst static struct dma_buf_ops radeon_dmabuf_ops = { 133254885Sdumbbell .map_dma_buf = radeon_gem_map_dma_buf, 134254885Sdumbbell .unmap_dma_buf = radeon_gem_unmap_dma_buf, 135254885Sdumbbell .release = radeon_gem_dmabuf_release, 136254885Sdumbbell .kmap = radeon_gem_kmap, 137254885Sdumbbell .kmap_atomic = radeon_gem_kmap_atomic, 138254885Sdumbbell .kunmap = radeon_gem_kunmap, 139254885Sdumbbell .kunmap_atomic = radeon_gem_kunmap_atomic, 140254885Sdumbbell .mmap = radeon_gem_prime_mmap, 141254885Sdumbbell .vmap = radeon_gem_prime_vmap, 142254885Sdumbbell .vunmap = radeon_gem_prime_vunmap, 143254885Sdumbbell}; 144254885Sdumbbell 145254885Sdumbbellstatic int radeon_prime_create(struct drm_device *dev, 146254885Sdumbbell size_t size, 147254885Sdumbbell struct sg_table *sg, 148254885Sdumbbell struct radeon_bo **pbo) 149254885Sdumbbell{ 150254885Sdumbbell struct radeon_device *rdev = dev->dev_private; 151254885Sdumbbell struct radeon_bo *bo; 152254885Sdumbbell int ret; 153254885Sdumbbell 154254885Sdumbbell ret = radeon_bo_create(rdev, size, PAGE_SIZE, false, 155254885Sdumbbell RADEON_GEM_DOMAIN_GTT, sg, pbo); 156254885Sdumbbell if (ret) 157254885Sdumbbell return ret; 158254885Sdumbbell bo = *pbo; 159254885Sdumbbell bo->gem_base.driver_private = bo; 160254885Sdumbbell 161254885Sdumbbell mutex_lock(&rdev->gem.mutex); 162254885Sdumbbell list_add_tail(&bo->list, &rdev->gem.objects); 163254885Sdumbbell mutex_unlock(&rdev->gem.mutex); 164254885Sdumbbell 165254885Sdumbbell return 0; 166254885Sdumbbell} 167254885Sdumbbell 168254885Sdumbbellstruct dma_buf *radeon_gem_prime_export(struct drm_device *dev, 169254885Sdumbbell struct drm_gem_object *obj, 170254885Sdumbbell int flags) 171254885Sdumbbell{ 172254885Sdumbbell struct radeon_bo *bo = gem_to_radeon_bo(obj); 173254885Sdumbbell int ret = 0; 174254885Sdumbbell 175254885Sdumbbell ret = radeon_bo_reserve(bo, false); 176254885Sdumbbell if (unlikely(ret != 0)) 177254885Sdumbbell return ERR_PTR(ret); 178254885Sdumbbell 179254885Sdumbbell /* pin buffer into GTT */ 180254885Sdumbbell ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 181254885Sdumbbell if (ret) { 182254885Sdumbbell radeon_bo_unreserve(bo); 183254885Sdumbbell return ERR_PTR(ret); 184254885Sdumbbell } 185254885Sdumbbell radeon_bo_unreserve(bo); 186254885Sdumbbell return dma_buf_export(bo, &radeon_dmabuf_ops, obj->size, flags); 187254885Sdumbbell} 188254885Sdumbbell 189254885Sdumbbellstruct drm_gem_object *radeon_gem_prime_import(struct drm_device *dev, 190254885Sdumbbell struct dma_buf *dma_buf) 191254885Sdumbbell{ 192254885Sdumbbell struct dma_buf_attachment *attach; 193254885Sdumbbell struct sg_table *sg; 194254885Sdumbbell struct radeon_bo *bo; 195254885Sdumbbell int ret; 196254885Sdumbbell 197254885Sdumbbell if (dma_buf->ops == &radeon_dmabuf_ops) { 198254885Sdumbbell bo = dma_buf->priv; 199254885Sdumbbell if (bo->gem_base.dev == dev) { 200254885Sdumbbell drm_gem_object_reference(&bo->gem_base); 201254885Sdumbbell dma_buf_put(dma_buf); 202254885Sdumbbell return &bo->gem_base; 203254885Sdumbbell } 204254885Sdumbbell } 205254885Sdumbbell 206254885Sdumbbell /* need to attach */ 207254885Sdumbbell attach = dma_buf_attach(dma_buf, dev->dev); 208254885Sdumbbell if (IS_ERR(attach)) 209254885Sdumbbell return ERR_CAST(attach); 210254885Sdumbbell 211254885Sdumbbell sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); 212254885Sdumbbell if (IS_ERR(sg)) { 213254885Sdumbbell ret = PTR_ERR(sg); 214254885Sdumbbell goto fail_detach; 215254885Sdumbbell } 216254885Sdumbbell 217254885Sdumbbell ret = radeon_prime_create(dev, dma_buf->size, sg, &bo); 218254885Sdumbbell if (ret) 219254885Sdumbbell goto fail_unmap; 220254885Sdumbbell 221254885Sdumbbell bo->gem_base.import_attach = attach; 222254885Sdumbbell 223254885Sdumbbell return &bo->gem_base; 224254885Sdumbbell 225254885Sdumbbellfail_unmap: 226254885Sdumbbell dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL); 227254885Sdumbbellfail_detach: 228254885Sdumbbell dma_buf_detach(dma_buf, attach); 229254885Sdumbbell return ERR_PTR(ret); 230254885Sdumbbell} 231