diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_prime.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_prime.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c new file mode 100644 index 000000000..c138e07f5 --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_prime.c @@ -0,0 +1,143 @@ +/* + * 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 <drm/drmP.h> + +#include "radeon.h" +#include <drm/radeon_drm.h> +#include <linux/dma-buf.h> + +struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) +{ + struct radeon_bo *bo = gem_to_radeon_bo(obj); + int npages = bo->tbo.num_pages; + + return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); +} + +void *radeon_gem_prime_vmap(struct drm_gem_object *obj) +{ + struct radeon_bo *bo = gem_to_radeon_bo(obj); + int ret; + + ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, + &bo->dma_buf_vmap); + if (ret) + return ERR_PTR(ret); + + return bo->dma_buf_vmap.virtual; +} + +void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) +{ + struct radeon_bo *bo = gem_to_radeon_bo(obj); + + ttm_bo_kunmap(&bo->dma_buf_vmap); +} + +struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, + struct dma_buf_attachment *attach, + struct sg_table *sg) +{ + struct reservation_object *resv = attach->dmabuf->resv; + struct radeon_device *rdev = dev->dev_private; + struct radeon_bo *bo; + int ret; + + ww_mutex_lock(&resv->lock, NULL); + ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, + RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); + ww_mutex_unlock(&resv->lock); + if (ret) + return ERR_PTR(ret); + + mutex_lock(&rdev->gem.mutex); + list_add_tail(&bo->list, &rdev->gem.objects); + mutex_unlock(&rdev->gem.mutex); + + bo->prime_shared_count = 1; + return &bo->gem_base; +} + +int radeon_gem_prime_pin(struct drm_gem_object *obj) +{ + struct radeon_bo *bo = gem_to_radeon_bo(obj); + int ret = 0; + + ret = radeon_bo_reserve(bo, false); + if (unlikely(ret != 0)) + return ret; + + /* pin buffer into GTT */ + ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); + if (unlikely(ret)) + goto error; + + if (bo->tbo.moving) { + ret = dma_fence_wait(bo->tbo.moving, false); + if (unlikely(ret)) { + radeon_bo_unpin(bo); + goto error; + } + } + + bo->prime_shared_count++; +error: + radeon_bo_unreserve(bo); + return ret; +} + +void radeon_gem_prime_unpin(struct drm_gem_object *obj) +{ + struct radeon_bo *bo = gem_to_radeon_bo(obj); + int ret = 0; + + ret = radeon_bo_reserve(bo, false); + if (unlikely(ret != 0)) + return; + + radeon_bo_unpin(bo); + if (bo->prime_shared_count) + bo->prime_shared_count--; + radeon_bo_unreserve(bo); +} + + +struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj) +{ + struct radeon_bo *bo = gem_to_radeon_bo(obj); + + return bo->tbo.resv; +} + +struct dma_buf *radeon_gem_prime_export(struct drm_device *dev, + struct drm_gem_object *gobj, + int flags) +{ + struct radeon_bo *bo = gem_to_radeon_bo(gobj); + if (radeon_ttm_tt_has_userptr(bo->tbo.ttm)) + return ERR_PTR(-EPERM); + return drm_gem_prime_export(dev, gobj, flags); +} |