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render/dmabuf: add dmabuf_export_sync_file()

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This commit is contained in:
Simon Ser 2022-12-01 11:29:30 +01:00 committed by Simon Zeni
parent 825f1b2dc6
commit 30219cf76b
3 changed files with 38 additions and 0 deletions
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9
include/render/dmabuf.h
View File

@ -23,4 +23,13 @@ bool dmabuf_check_sync_file_import_export(void);
*/
bool dmabuf_import_sync_file(int dmabuf_fd, uint32_t flags, int sync_file_fd);
/**
* Export a sync_file from a DMA-BUF with DMA_BUF_IOCTL_EXPORT_SYNC_FILE.
*
* The sync_file FD is returned on success, -1 is returned on error.
*
* This can be used to make explicit sync interoperate with implicit sync.
*/
int dmabuf_export_sync_file(int dmabuf_fd, uint32_t flags);
#endif

5
render/dmabuf_fallback.c
View File

@ -10,3 +10,8 @@ bool dmabuf_import_sync_file(int dmabuf_fd, uint32_t flags, int sync_file_fd) {
wlr_log(WLR_ERROR, "DMA-BUF sync_file import IOCTL not available on this system");
return false;
}
int dmabuf_export_sync_file(int dmabuf_fd, uint32_t flags) {
wlr_log(WLR_ERROR, "DMA-BUF sync_file export IOCTL not available on this system");
return false;
}

24
render/dmabuf_linux.c
View File

@ -51,6 +51,7 @@ bool dmabuf_check_sync_file_import_export(void) {
}
// TODO: drop these definitions once widespread
#if !defined(DMA_BUF_IOCTL_IMPORT_SYNC_FILE)
struct dma_buf_import_sync_file {
@ -62,6 +63,17 @@ struct dma_buf_import_sync_file {
#endif
#if !defined(DMA_BUF_IOCTL_EXPORT_SYNC_FILE)
struct dma_buf_export_sync_file {
__u32 flags;
__s32 fd;
};
#define DMA_BUF_IOCTL_EXPORT_SYNC_FILE _IOWR(DMA_BUF_BASE, 2, struct dma_buf_export_sync_file)
#endif
bool dmabuf_import_sync_file(int dmabuf_fd, uint32_t flags, int sync_file_fd) {
struct dma_buf_import_sync_file data = {
.flags = flags,
@ -73,3 +85,15 @@ bool dmabuf_import_sync_file(int dmabuf_fd, uint32_t flags, int sync_file_fd) {
}
return true;
}
int dmabuf_export_sync_file(int dmabuf_fd, uint32_t flags) {
struct dma_buf_export_sync_file data = {
.flags = flags,
.fd = -1,
};
if (drmIoctl(dmabuf_fd, DMA_BUF_IOCTL_EXPORT_SYNC_FILE, &data) != 0) {
wlr_log_errno(WLR_ERROR, "drmIoctl(EXPORT_SYNC_FILE) failed");
return -1;
}
return data.fd;
}