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lib: Add read/write direction support for dmabuf synchronisation

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Allow read-only synchronisation on dmabuf mmaps, useful to allow
concurrent read-read testing between the CPU and GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2016-02-25 21:43:01 +00:00
parent 925e5e1cae
commit aed69b56d4
5 changed files with 21 additions and 15 deletions
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tests/prime_mmap_coherency.c
+2 -2
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@@ -97,7 +97,7 @@ static void test_read_flush(bool expect_stale_cache)
* until we try to read them again in step #4. This behavior could be fixed
* by flush CPU read right before accessing the CPU pointer */
if (!expect_stale_cache)
prime_sync_start(dma_buf_fd);
prime_sync_start(dma_buf_fd, false);
for (i = 0; i < (width * height) / 4; i++)
if (ptr_cpu[i] != 0x11111111) {
@@ -149,7 +149,7 @@ static void test_write_flush(bool expect_stale_cache)
/* This is the main point of this test: !llc hw requires a cache write
* flush right here (explained in step #4). */
if (!expect_stale_cache)
prime_sync_start(dma_buf_fd);
prime_sync_start(dma_buf_fd, true);
memset(ptr_cpu, 0x11, width * height);