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lib: Add prime_sync_start and prime_sync_end helpers

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This patch adds dma-buf mmap synchronization ioctls that can be used by tests
for cache coherency management e.g. when CPU and GPU domains are being accessed
through dma-buf at the same time.

Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>
This commit is contained in:
Tiago Vignatti 2015-12-11 18:50:35 -02:00
parent b7856ef953
commit 22dd9f987e
2 changed files with 41 additions and 0 deletions
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26
lib/ioctl_wrappers.c
View File

@ -1399,6 +1399,32 @@ off_t prime_get_size(int dma_buf_fd)
return ret;
}
/**
* prime_sync_start
* @dma_buf_fd: dma-buf fd handle
*/
void prime_sync_start(int dma_buf_fd)
{
struct local_dma_buf_sync sync_start;
memset(&sync_start, 0, sizeof(sync_start));
sync_start.flags = LOCAL_DMA_BUF_SYNC_START | LOCAL_DMA_BUF_SYNC_RW;
do_ioctl(dma_buf_fd, LOCAL_DMA_BUF_IOCTL_SYNC, &sync_start);
}
/**
* prime_sync_end
* @dma_buf_fd: dma-buf fd handle
*/
void prime_sync_end(int dma_buf_fd)
{
struct local_dma_buf_sync sync_end;
memset(&sync_end, 0, sizeof(sync_end));
sync_end.flags = LOCAL_DMA_BUF_SYNC_END | LOCAL_DMA_BUF_SYNC_RW;
do_ioctl(dma_buf_fd, LOCAL_DMA_BUF_IOCTL_SYNC, &sync_end);
}
/**
* igt_require_fb_modifiers:
* @fd: Open DRM file descriptor.

15
lib/ioctl_wrappers.h
View File

@ -148,6 +148,19 @@ void gem_require_caching(int fd);
void gem_require_ring(int fd, int ring_id);
/* prime */
struct local_dma_buf_sync {
uint64_t flags;
};
#define LOCAL_DMA_BUF_SYNC_RW (3 << 0)
#define LOCAL_DMA_BUF_SYNC_START (0 << 2)
#define LOCAL_DMA_BUF_SYNC_END (1 << 2)
#define DMA_BUF_SYNC_VALID_FLAGS_MASK \
(DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
#define LOCAL_DMA_BUF_BASE 'b'
#define LOCAL_DMA_BUF_IOCTL_SYNC _IOW(LOCAL_DMA_BUF_BASE, 0, struct local_dma_buf_sync)
int prime_handle_to_fd(int fd, uint32_t handle);
#ifndef DRM_RDWR
#define DRM_RDWR O_RDWR
@ -155,6 +168,8 @@ int prime_handle_to_fd(int fd, uint32_t handle);
int prime_handle_to_fd_for_mmap(int fd, uint32_t handle);
uint32_t prime_fd_to_handle(int fd, int dma_buf_fd);
off_t prime_get_size(int dma_buf_fd);
void prime_sync_start(int dma_buf_fd);
void prime_sync_end(int dma_buf_fd);
/* addfb2 fb modifiers */
struct local_drm_mode_fb_cmd2 {