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 --- lib/ioctl_wrappers.c | 26 ++++++++++++++++++++++++++ lib/ioctl_wrappers.h | 15 +++++++++++++++ 2 files changed, 41 insertions(+)
diff --git a/lib/ioctl_wrappers.c b/lib/ioctl_wrappers.c index 86a61ba..0d84d00 100644 --- a/lib/ioctl_wrappers.c +++ b/lib/ioctl_wrappers.c @@ -1400,6 +1400,32 @@ off_t prime_get_size(int dma_buf_fd) }
/** + * 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. * diff --git a/lib/ioctl_wrappers.h b/lib/ioctl_wrappers.h index d3ffba2..cbd7a73 100644 --- a/lib/ioctl_wrappers.h +++ b/lib/ioctl_wrappers.h @@ -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 {