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dma-buf: cma_heap: support dmabuf partial sync

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Add partital sync support for begain/end of cpu access.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Change-Id: I36cc7d2fffd1e22d796d429c76a990542acb8dd2
This commit is contained in:
Jianqun Xu
2022-05-12 15:02:17 +08:00
committed by Tao Huang
parent 33b98bf612
commit dcbfe3bd8c
1 changed files with 42 additions and 4 deletions
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46
drivers/dma-buf/heaps/cma_heap.c
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@@ -132,8 +132,11 @@ static void cma_heap_unmap_dma_buf(struct dma_buf_attachment *attachment,
dma_unmap_sgtable(attachment->dev, table, direction, attrs); dma_unmap_sgtable(attachment->dev, table, direction, attrs);
} }
static int cma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf, static int
enum dma_data_direction direction) cma_heap_dma_buf_begin_cpu_access_partial(struct dma_buf *dmabuf,
enum dma_data_direction direction,
unsigned int offset,
unsigned int len)
{ {
struct cma_heap_buffer *buffer = dmabuf->priv; struct cma_heap_buffer *buffer = dmabuf->priv;
struct dma_heap_attachment *a; struct dma_heap_attachment *a;
@@ -150,13 +153,24 @@ static int cma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
continue; continue;
dma_sync_sgtable_for_cpu(a->dev, &a->table, direction); dma_sync_sgtable_for_cpu(a->dev, &a->table, direction);
} }
if (list_empty(&buffer->attachments)) {
phys_addr_t phys = page_to_phys(buffer->cma_pages);
dma_sync_single_for_cpu(dma_heap_get_dev(buffer->heap->heap),
phys + offset,
len,
direction);
}
mutex_unlock(&buffer->lock); mutex_unlock(&buffer->lock);
return 0; return 0;
} }
static int cma_heap_dma_buf_end_cpu_access(struct dma_buf *dmabuf, static int
enum dma_data_direction direction) cma_heap_dma_buf_end_cpu_access_partial(struct dma_buf *dmabuf,
enum dma_data_direction direction,
unsigned int offset,
unsigned int len)
{ {
struct cma_heap_buffer *buffer = dmabuf->priv; struct cma_heap_buffer *buffer = dmabuf->priv;
struct dma_heap_attachment *a; struct dma_heap_attachment *a;
@@ -173,11 +187,33 @@ static int cma_heap_dma_buf_end_cpu_access(struct dma_buf *dmabuf,
continue; continue;
dma_sync_sgtable_for_device(a->dev, &a->table, direction); dma_sync_sgtable_for_device(a->dev, &a->table, direction);
} }
if (list_empty(&buffer->attachments)) {
phys_addr_t phys = page_to_phys(buffer->cma_pages);
dma_sync_single_for_device(dma_heap_get_dev(buffer->heap->heap),
phys + offset,
len,
direction);
}
mutex_unlock(&buffer->lock); mutex_unlock(&buffer->lock);
return 0; return 0;
} }
static int cma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
enum dma_data_direction dir)
{
return cma_heap_dma_buf_begin_cpu_access_partial(dmabuf, dir, 0,
dmabuf->size);
}
static int cma_heap_dma_buf_end_cpu_access(struct dma_buf *dmabuf,
enum dma_data_direction dir)
{
return cma_heap_dma_buf_end_cpu_access_partial(dmabuf, dir, 0,
dmabuf->size);
}
static vm_fault_t cma_heap_vm_fault(struct vm_fault *vmf) static vm_fault_t cma_heap_vm_fault(struct vm_fault *vmf)
{ {
struct vm_area_struct *vma = vmf->vma; struct vm_area_struct *vma = vmf->vma;
@@ -287,6 +323,8 @@ static const struct dma_buf_ops cma_heap_buf_ops = {
.unmap_dma_buf = cma_heap_unmap_dma_buf, .unmap_dma_buf = cma_heap_unmap_dma_buf,
.begin_cpu_access = cma_heap_dma_buf_begin_cpu_access, .begin_cpu_access = cma_heap_dma_buf_begin_cpu_access,
.end_cpu_access = cma_heap_dma_buf_end_cpu_access, .end_cpu_access = cma_heap_dma_buf_end_cpu_access,
.begin_cpu_access_partial = cma_heap_dma_buf_begin_cpu_access_partial,
.end_cpu_access_partial = cma_heap_dma_buf_end_cpu_access_partial,
.mmap = cma_heap_mmap, .mmap = cma_heap_mmap,
.vmap = cma_heap_vmap, .vmap = cma_heap_vmap,
.vunmap = cma_heap_vunmap, .vunmap = cma_heap_vunmap,