![Dave Airlie](/assets/img/avatar_default.png)
I finally got to test this code a bit more and hit the ttm no reserved assert, so add the reservations around the pinning. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
227 lines
5.9 KiB
C
227 lines
5.9 KiB
C
/*
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* Copyright 2012 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* based on nouveau_prime.c
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*
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* Authors: Alex Deucher
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*/
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#include "drmP.h"
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#include "drm.h"
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#include "radeon.h"
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#include "radeon_drm.h"
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#include <linux/dma-buf.h>
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static struct sg_table *radeon_gem_map_dma_buf(struct dma_buf_attachment *attachment,
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enum dma_data_direction dir)
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{
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struct radeon_bo *bo = attachment->dmabuf->priv;
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struct drm_device *dev = bo->rdev->ddev;
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int npages = bo->tbo.num_pages;
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struct sg_table *sg;
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int nents;
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mutex_lock(&dev->struct_mutex);
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sg = drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
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nents = dma_map_sg(attachment->dev, sg->sgl, sg->nents, dir);
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mutex_unlock(&dev->struct_mutex);
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return sg;
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}
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static void radeon_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
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struct sg_table *sg, enum dma_data_direction dir)
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{
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dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir);
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sg_free_table(sg);
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kfree(sg);
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}
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static void radeon_gem_dmabuf_release(struct dma_buf *dma_buf)
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{
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struct radeon_bo *bo = dma_buf->priv;
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if (bo->gem_base.export_dma_buf == dma_buf) {
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DRM_ERROR("unreference dmabuf %p\n", &bo->gem_base);
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bo->gem_base.export_dma_buf = NULL;
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drm_gem_object_unreference_unlocked(&bo->gem_base);
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}
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}
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static void *radeon_gem_kmap_atomic(struct dma_buf *dma_buf, unsigned long page_num)
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{
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return NULL;
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}
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static void radeon_gem_kunmap_atomic(struct dma_buf *dma_buf, unsigned long page_num, void *addr)
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{
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}
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static void *radeon_gem_kmap(struct dma_buf *dma_buf, unsigned long page_num)
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{
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return NULL;
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}
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static void radeon_gem_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr)
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{
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}
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static int radeon_gem_prime_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
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{
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return -EINVAL;
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}
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static void *radeon_gem_prime_vmap(struct dma_buf *dma_buf)
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{
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struct radeon_bo *bo = dma_buf->priv;
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struct drm_device *dev = bo->rdev->ddev;
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int ret;
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mutex_lock(&dev->struct_mutex);
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if (bo->vmapping_count) {
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bo->vmapping_count++;
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goto out_unlock;
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}
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ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
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&bo->dma_buf_vmap);
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if (ret) {
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mutex_unlock(&dev->struct_mutex);
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return ERR_PTR(ret);
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}
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bo->vmapping_count = 1;
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out_unlock:
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mutex_unlock(&dev->struct_mutex);
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return bo->dma_buf_vmap.virtual;
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}
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static void radeon_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr)
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{
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struct radeon_bo *bo = dma_buf->priv;
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struct drm_device *dev = bo->rdev->ddev;
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mutex_lock(&dev->struct_mutex);
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bo->vmapping_count--;
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if (bo->vmapping_count == 0) {
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ttm_bo_kunmap(&bo->dma_buf_vmap);
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}
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mutex_unlock(&dev->struct_mutex);
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}
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const static struct dma_buf_ops radeon_dmabuf_ops = {
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.map_dma_buf = radeon_gem_map_dma_buf,
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.unmap_dma_buf = radeon_gem_unmap_dma_buf,
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.release = radeon_gem_dmabuf_release,
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.kmap = radeon_gem_kmap,
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.kmap_atomic = radeon_gem_kmap_atomic,
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.kunmap = radeon_gem_kunmap,
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.kunmap_atomic = radeon_gem_kunmap_atomic,
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.mmap = radeon_gem_prime_mmap,
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.vmap = radeon_gem_prime_vmap,
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.vunmap = radeon_gem_prime_vunmap,
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};
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static int radeon_prime_create(struct drm_device *dev,
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size_t size,
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struct sg_table *sg,
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struct radeon_bo **pbo)
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{
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struct radeon_device *rdev = dev->dev_private;
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struct radeon_bo *bo;
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int ret;
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ret = radeon_bo_create(rdev, size, PAGE_SIZE, false,
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RADEON_GEM_DOMAIN_GTT, sg, pbo);
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if (ret)
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return ret;
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bo = *pbo;
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bo->gem_base.driver_private = bo;
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mutex_lock(&rdev->gem.mutex);
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list_add_tail(&bo->list, &rdev->gem.objects);
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mutex_unlock(&rdev->gem.mutex);
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return 0;
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}
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struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
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struct drm_gem_object *obj,
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int flags)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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int ret = 0;
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ret = radeon_bo_reserve(bo, false);
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if (unlikely(ret != 0))
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return ERR_PTR(ret);
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/* pin buffer into GTT */
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ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
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if (ret) {
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radeon_bo_unreserve(bo);
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return ERR_PTR(ret);
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}
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radeon_bo_unreserve(bo);
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return dma_buf_export(bo, &radeon_dmabuf_ops, obj->size, flags);
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}
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struct drm_gem_object *radeon_gem_prime_import(struct drm_device *dev,
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struct dma_buf *dma_buf)
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{
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struct dma_buf_attachment *attach;
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struct sg_table *sg;
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struct radeon_bo *bo;
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int ret;
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if (dma_buf->ops == &radeon_dmabuf_ops) {
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bo = dma_buf->priv;
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if (bo->gem_base.dev == dev) {
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drm_gem_object_reference(&bo->gem_base);
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return &bo->gem_base;
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}
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}
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/* need to attach */
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attach = dma_buf_attach(dma_buf, dev->dev);
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if (IS_ERR(attach))
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return ERR_CAST(attach);
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sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
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if (IS_ERR(sg)) {
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ret = PTR_ERR(sg);
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goto fail_detach;
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}
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ret = radeon_prime_create(dev, dma_buf->size, sg, &bo);
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if (ret)
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goto fail_unmap;
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bo->gem_base.import_attach = attach;
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return &bo->gem_base;
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fail_unmap:
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dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
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fail_detach:
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dma_buf_detach(dma_buf, attach);
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return ERR_PTR(ret);
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}
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