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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ac45146733
We need to return a new sgt, since the caller takes ownership of it. Reported-by: Stanimir Varbanov <svarbanov@mm-sol.com> Signed-off-by: Rob Clark <robdclark@gmail.com>
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "msm_drv.h"
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#include "msm_gem.h"
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#include <linux/dma-buf.h>
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struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
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{
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struct msm_gem_object *msm_obj = to_msm_bo(obj);
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int npages = obj->size >> PAGE_SHIFT;
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if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
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return NULL;
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return drm_prime_pages_to_sg(msm_obj->pages, npages);
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}
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void *msm_gem_prime_vmap(struct drm_gem_object *obj)
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{
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return msm_gem_vaddr(obj);
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}
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void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
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{
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/* TODO msm_gem_vunmap() */
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}
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int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
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{
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int ret;
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mutex_lock(&obj->dev->struct_mutex);
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ret = drm_gem_mmap_obj(obj, obj->size, vma);
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mutex_unlock(&obj->dev->struct_mutex);
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if (ret < 0)
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return ret;
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return msm_gem_mmap_obj(vma->vm_private_data, vma);
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}
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struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach, struct sg_table *sg)
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{
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return msm_gem_import(dev, attach->dmabuf->size, sg);
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}
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int msm_gem_prime_pin(struct drm_gem_object *obj)
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{
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if (!obj->import_attach)
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msm_gem_get_pages(obj);
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return 0;
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}
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void msm_gem_prime_unpin(struct drm_gem_object *obj)
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{
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if (!obj->import_attach)
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msm_gem_put_pages(obj);
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}
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