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vidmem: implement dma_buf_ops release to free buffers

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This commit implement dma_buf_ops release to free buffer
in function _dmabuf_release(struct dma_buf *dmabuf).

Default use  pr_debug for dynamic debug in macro DEBUG_PRINT.

Signed-off-by: xianbing Zhu <xianbing.zhu@linux.alibaba.com>
Change-Id: Id0a5841ccf8459c469034866dd2878e8698a57a4
Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
This commit is contained in:
Han Gao
2024-07-21 00:17:45 +08:00
committed by Han Gao
parent 3ef68d010b
commit d2247b2403
1 changed files with 23 additions and 2 deletions
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drivers/video/video_memory/driver/video_memory.c
+23 -2
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@@ -184,6 +184,7 @@
#ifndef VIDMEM_DEBUG
#define DEBUG_PRINT(...) \
do { \
pr_debug(__VA_ARGS__);\
} while (0)
#else
#undef DEBUG_PRINT
@@ -205,7 +206,7 @@ struct mem_block
bool is_vi_mem;
bool cache_en;
void *va;
struct file *filp;
union
{
/* Pointer to a array of pages. */
@@ -261,6 +262,11 @@ getPhysical(
IN unsigned int Offset,
OUT unsigned long * Physical
);
void
GFP_Free(
IN struct file *filp,
IN unsigned long bus_address
);
static struct file_node * find_and_delete_file_node(struct file *filp)
{
@@ -701,6 +707,20 @@ OnError:
static void _dmabuf_release(struct dma_buf *dmabuf)
{
struct mem_block *memBlk = dmabuf->priv;
unsigned long physical;
if (!memBlk)
return;
if(!memBlk->filp)
{
DEBUG_PRINT("[vidmem] %s, %d: memBlk filp null\n", __func__, __LINE__);
return;
}
getPhysical(memBlk, 0, &physical);
DEBUG_PRINT("[vidmem] %s, %d: free physical %llx\n", __func__, __LINE__,physical);
GFP_Free(memBlk->filp,physical);
}
static void *_dmabuf_kmap(struct dma_buf *dmabuf, unsigned long offset)
@@ -749,6 +769,7 @@ DMABUF_Export(
}
memBlk = &mnode->memBlk;
memBlk->filp = filp;
dmabuf = memBlk->dmabuf;
if (dmabuf == NULL)
@@ -818,7 +839,7 @@ DMABUF_Import(
}
memBlk = &mnode->memBlk;
memBlk->filp = filp;
/* Import dma buf handle. */
memBlk->dmabuf = dma_buf_get(FD);
if (!memBlk->dmabuf)