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dma-buf: system_heap: do force sync only if attachment list empty

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When the dmabuf attachment list is empty, do force sync with the heap
device, it is useful for partial access for cpu.

Fixes: 21f2fd663e ("dma-buf: system_heap: support cpu access partial dma-buf")
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Change-Id: Ie266767aeb03a361e1541ba9e84f3dd027350a75
This commit is contained in:
Jianqun Xu
2022-05-12 14:58:06 +08:00
committed by Tao Huang
parent 22e04a3fa8
commit 33b98bf612
1 changed files with 20 additions and 27 deletions
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47
drivers/dma-buf/heaps/system_heap.c
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@@ -26,8 +26,6 @@
#include "page_pool.h"
#include "deferred-free-helper.h"
#define CONFIG_SYSTEM_HEAP_FORCE_DMA_SYNC
static struct dma_heap *sys_heap;
static struct dma_heap *sys_dma32_heap;
static struct dma_heap *sys_uncached_heap;
@@ -241,7 +239,7 @@ static int system_heap_sgl_sync_range(struct device *dev,
for_each_sg(sgl, sg, nents, i) {
unsigned int sg_offset, sg_left, size = 0;
sg_dma_addr = sg_dma_address(sg);
sg_dma_addr = sg_phys(sg);
len += sg->length;
if (len <= offset)
@@ -282,18 +280,6 @@ system_heap_dma_buf_begin_cpu_access_partial(struct dma_buf *dmabuf,
return 0;
mutex_lock(&buffer->lock);
if (IS_ENABLED(CONFIG_SYSTEM_HEAP_FORCE_DMA_SYNC)) {
struct dma_heap *heap = buffer->heap;
struct sg_table *table = &buffer->sg_table;
ret = system_heap_sgl_sync_range(dma_heap_get_dev(heap),
table->sgl,
table->nents,
offset, len,
direction, true);
goto unlock;
}
if (buffer->vmap_cnt)
invalidate_kernel_vmap_range(buffer->vaddr, buffer->len);
@@ -309,7 +295,16 @@ system_heap_dma_buf_begin_cpu_access_partial(struct dma_buf *dmabuf,
offset, len,
direction, true);
}
if (list_empty(&buffer->attachments)) {
struct dma_heap *heap = buffer->heap;
struct sg_table *table = &buffer->sg_table;
ret = system_heap_sgl_sync_range(dma_heap_get_dev(heap),
table->sgl,
table->nents,
offset, len,
direction, true);
}
unlock:
mutex_unlock(&buffer->lock);
@@ -327,18 +322,6 @@ system_heap_dma_buf_end_cpu_access_partial(struct dma_buf *dmabuf,
int ret = 0;
mutex_lock(&buffer->lock);
if (IS_ENABLED(CONFIG_SYSTEM_HEAP_FORCE_DMA_SYNC)) {
struct dma_heap *heap = buffer->heap;
struct sg_table *table = &buffer->sg_table;
ret = system_heap_sgl_sync_range(dma_heap_get_dev(heap),
table->sgl,
table->nents,
offset, len,
direction, false);
goto unlock;
}
if (buffer->vmap_cnt)
flush_kernel_vmap_range(buffer->vaddr, buffer->len);
@@ -354,6 +337,16 @@ system_heap_dma_buf_end_cpu_access_partial(struct dma_buf *dmabuf,
offset, len,
direction, false);
}
if (list_empty(&buffer->attachments)) {
struct dma_heap *heap = buffer->heap;
struct sg_table *table = &buffer->sg_table;
ret = system_heap_sgl_sync_range(dma_heap_get_dev(heap),
table->sgl,
table->nents,
offset, len,
direction, false);
}
unlock:
mutex_unlock(&buffer->lock);