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android: ion: add vmap/vunmap operations

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Change-Id: I90e2bcdd4526409194917609deb791e7badaf4f4
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
This commit is contained in:
Jianqun Xu
2020-12-16 19:54:01 +08:00
committed by Tao Huang
parent 85adafe7d8
commit 8086d8dbbe
1 changed files with 44 additions and 2 deletions
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46
drivers/staging/android/ion/ion.c
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@@ -328,16 +328,56 @@ static void ion_dma_buf_release(struct dma_buf *dmabuf)
_ion_buffer_destroy(buffer);
}
static void *ion_dma_buf_kmap(struct dma_buf *dmabuf, unsigned long offset)
static void *ion_dma_buf_vmap(struct dma_buf *dmabuf)
{
struct ion_buffer *buffer = dmabuf->priv;
void *vaddr = ERR_PTR(-EINVAL);
if (buffer->heap->ops->map_kernel) {
mutex_lock(&buffer->lock);
vaddr = ion_buffer_kmap_get(buffer);
mutex_unlock(&buffer->lock);
} else {
pr_warn_ratelimited("heap %s doesn't support map_kernel\n",
buffer->heap->name);
}
return vaddr;
}
static void ion_dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr)
{
struct ion_buffer *buffer = dmabuf->priv;
return buffer->vaddr + offset * PAGE_SIZE;
if (buffer->heap->ops->map_kernel) {
mutex_lock(&buffer->lock);
ion_buffer_kmap_put(buffer);
mutex_unlock(&buffer->lock);
}
}
static void *ion_dma_buf_kmap(struct dma_buf *dmabuf, unsigned long offset)
{
/*
* TODO: Once clients remove their hacks where they assume kmap(ed)
* addresses are virtually contiguous implement this properly
*/
void *vaddr = ion_dma_buf_vmap(dmabuf);
if (IS_ERR(vaddr))
return vaddr;
return vaddr + offset * PAGE_SIZE;
}
static void ion_dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long offset,
void *ptr)
{
/*
* TODO: Once clients remove their hacks where they assume kmap(ed)
* addresses are virtually contiguous implement this properly
*/
ion_dma_buf_vunmap(dmabuf, ptr);
}
static int ion_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
@@ -409,6 +449,8 @@ static const struct dma_buf_ops dma_buf_ops = {
.end_cpu_access = ion_dma_buf_end_cpu_access,
.map = ion_dma_buf_kmap,
.unmap = ion_dma_buf_kunmap,
.vmap = ion_dma_buf_vmap,
.vunmap = ion_dma_buf_vunmap,
};
int ion_alloc(size_t len, unsigned int heap_id_mask, unsigned int flags)