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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <linux/dma-buf.h>
#include <drm/drm_drv.h>
#include <drm/drm_prime.h>
#include "msm_drv.h"
#include "msm_gem.h"
struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);
int npages = obj->size >> PAGE_SHIFT;
if (msm_obj->flags & MSM_BO_NO_SHARE)
return ERR_PTR(-EINVAL);
if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
return ERR_PTR(-ENOMEM);
return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
}
int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
{
void *vaddr;
vaddr = msm_gem_get_vaddr_locked(obj);
if (IS_ERR(vaddr))
return PTR_ERR(vaddr);
iosys_map_set_vaddr(map, vaddr);
return 0;
}
void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
{
msm_gem_put_vaddr_locked(obj);
}
static void msm_gem_dmabuf_release(struct dma_buf *dma_buf)
{
struct drm_gem_object *obj = dma_buf->priv;
msm_gem_vma_put(obj);
drm_gem_dmabuf_release(dma_buf);
}
static const struct dma_buf_ops msm_gem_prime_dmabuf_ops = {
.attach = drm_gem_map_attach,
.detach = drm_gem_map_detach,
.map_dma_buf = drm_gem_map_dma_buf,
.unmap_dma_buf = drm_gem_unmap_dma_buf,
.release = msm_gem_dmabuf_release,
.mmap = drm_gem_dmabuf_mmap,
.vmap = drm_gem_dmabuf_vmap,
.vunmap = drm_gem_dmabuf_vunmap,
};
struct drm_gem_object *msm_gem_prime_import(struct drm_device *dev,
struct dma_buf *buf)
{
if (buf->ops == &msm_gem_prime_dmabuf_ops) {
struct drm_gem_object *obj = buf->priv;
if (obj->dev == dev) {
/*
* Importing dmabuf exported from our own gem increases
* refcount on gem itself instead of f_count of dmabuf.
*/
drm_gem_object_get(obj);
return obj;
}
}
return drm_gem_prime_import(dev, buf);
}
struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach, struct sg_table *sg)
{
return msm_gem_import(dev, attach->dmabuf, sg);
}
struct dma_buf *msm_gem_prime_export(struct drm_gem_object *obj, int flags)
{
if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE)
return ERR_PTR(-EPERM);
msm_gem_vma_get(obj);
struct drm_device *dev = obj->dev;
struct dma_buf_export_info exp_info = {
.exp_name = KBUILD_MODNAME, /* white lie for debug */
.owner = dev->driver->fops->owner,
.ops = &msm_gem_prime_dmabuf_ops,
.size = obj->size,
.flags = flags,
.priv = obj,
.resv = obj->resv,
};
return drm_gem_dmabuf_export(dev, &exp_info);
}
int msm_gem_prime_pin(struct drm_gem_object *obj)
{
struct page **pages;
int ret = 0;
if (drm_gem_is_imported(obj))
return 0;
if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE)
return -EINVAL;
pages = msm_gem_pin_pages_locked(obj);
if (IS_ERR(pages))
ret = PTR_ERR(pages);
return ret;
}
void msm_gem_prime_unpin(struct drm_gem_object *obj)
{
if (drm_gem_is_imported(obj))
return;
msm_gem_unpin_pages_locked(obj);
}
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