/* $OpenBSD: radeon_prime.c,v 1.3 2014/02/09 11:03:31 jsg Exp $ */ /* * Copyright 2012 Advanced Micro Devices, Inc. * * 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. * * based on nouveau_prime.c * * Authors: Alex Deucher */ #include #include "radeon.h" #include static struct sg_table *radeon_gem_map_dma_buf(struct dma_buf_attachment *attachment, enum dma_data_direction dir) { struct radeon_bo *bo = attachment->dmabuf->priv; struct drm_device *dev = bo->rdev->ddev; int npages = bo->tbo.num_pages; struct sg_table *sg; int nents; rw_enter_write(&dev->struct_rwlock); sg = drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); nents = dma_map_sg(attachment->dev, sg->sgl, sg->nents, dir); rw_exit_write(&dev->struct_rwlock); return sg; } static void radeon_gem_unmap_dma_buf(struct dma_buf_attachment *attachment, struct sg_table *sg, enum dma_data_direction dir) { dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir); sg_free_table(sg); kfree(sg); } static void radeon_gem_dmabuf_release(struct dma_buf *dma_buf) { struct radeon_bo *bo = dma_buf->priv; if (bo->gem_base.export_dma_buf == dma_buf) { DRM_ERROR("unreference dmabuf %p\n", &bo->gem_base); bo->gem_base.export_dma_buf = NULL; drm_gem_object_unreference_unlocked(&bo->gem_base); } } static void *radeon_gem_kmap_atomic(struct dma_buf *dma_buf, unsigned long page_num) { return NULL; } static void radeon_gem_kunmap_atomic(struct dma_buf *dma_buf, unsigned long page_num, void *addr) { } static void *radeon_gem_kmap(struct dma_buf *dma_buf, unsigned long page_num) { return NULL; } static void radeon_gem_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr) { } static int radeon_gem_prime_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) { return -EINVAL; } static void *radeon_gem_prime_vmap(struct dma_buf *dma_buf) { struct radeon_bo *bo = dma_buf->priv; struct drm_device *dev = bo->rdev->ddev; int ret; rw_enter_write(&dev->struct_rwlock); if (bo->vmapping_count) { bo->vmapping_count++; goto out_unlock; } ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->dma_buf_vmap); if (ret) { rw_exit_write(&dev->struct_rwlock); return ERR_PTR(ret); } bo->vmapping_count = 1; out_unlock: rw_exit_write(&dev->struct_rwlock); return bo->dma_buf_vmap.virtual; } static void radeon_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr) { struct radeon_bo *bo = dma_buf->priv; struct drm_device *dev = bo->rdev->ddev; rw_enter_write(&dev->struct_rwlock); bo->vmapping_count--; if (bo->vmapping_count == 0) { ttm_bo_kunmap(&bo->dma_buf_vmap); } rw_exit_write(&dev->struct_rwlock); } const static struct dma_buf_ops radeon_dmabuf_ops = { .map_dma_buf = radeon_gem_map_dma_buf, .unmap_dma_buf = radeon_gem_unmap_dma_buf, .release = radeon_gem_dmabuf_release, .kmap = radeon_gem_kmap, .kmap_atomic = radeon_gem_kmap_atomic, .kunmap = radeon_gem_kunmap, .kunmap_atomic = radeon_gem_kunmap_atomic, .mmap = radeon_gem_prime_mmap, .vmap = radeon_gem_prime_vmap, .vunmap = radeon_gem_prime_vunmap, }; static int radeon_prime_create(struct drm_device *dev, size_t size, struct sg_table *sg, struct radeon_bo **pbo) { struct radeon_device *rdev = dev->dev_private; struct radeon_bo *bo; int ret; ret = radeon_bo_create(rdev, size, PAGE_SIZE, false, RADEON_GEM_DOMAIN_GTT, sg, pbo); if (ret) return ret; bo = *pbo; bo->gem_base.driver_private = bo; rw_enter_write(&rdev->gem.rwlock); list_add_tail(&bo->list, &rdev->gem.objects); rw_exit_write(&rdev->gem.rwlock); return 0; } struct dma_buf *radeon_gem_prime_export(struct drm_device *dev, struct drm_gem_object *obj, int flags) { struct radeon_bo *bo = gem_to_radeon_bo(obj); int ret = 0; ret = radeon_bo_reserve(bo, false); if (unlikely(ret != 0)) return ERR_PTR(ret); /* pin buffer into GTT */ ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); if (ret) { radeon_bo_unreserve(bo); return ERR_PTR(ret); } radeon_bo_unreserve(bo); return dma_buf_export(bo, &radeon_dmabuf_ops, obj->size, flags); } struct drm_gem_object *radeon_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf) { struct dma_buf_attachment *attach; struct sg_table *sg; struct radeon_bo *bo; int ret; if (dma_buf->ops == &radeon_dmabuf_ops) { bo = dma_buf->priv; if (bo->gem_base.dev == dev) { drm_gem_object_reference(&bo->gem_base); dma_buf_put(dma_buf); return &bo->gem_base; } } /* need to attach */ attach = dma_buf_attach(dma_buf, dev->dev); if (IS_ERR(attach)) return ERR_CAST(attach); sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); if (IS_ERR(sg)) { ret = PTR_ERR(sg); goto fail_detach; } ret = radeon_prime_create(dev, dma_buf->size, sg, &bo); if (ret) goto fail_unmap; bo->gem_base.import_attach = attach; return &bo->gem_base; fail_unmap: dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL); fail_detach: dma_buf_detach(dma_buf, attach); return ERR_PTR(ret); }