Mesa (master): drm-uapi: Add sync_file.h
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Tue Jun 16 16:33:59 UTC 2020
Module: Mesa
Branch: master
Commit: 0bd5f9a5bc92ad75675ea42e9163d5520075b5e2
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=0bd5f9a5bc92ad75675ea42e9163d5520075b5e2
Author: Jan Beich <jbeich at FreeBSD.org>
Date: Mon Jun 15 17:55:51 2020 +0000
drm-uapi: Add sync_file.h
Based on <linux/sync_file.h> with BSD portability conditional.
At least FreeBSD supports SYNC_IOC_* via LinuxKPI in DRM.
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5463>
---
include/drm-uapi/sync_file.h | 116 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 116 insertions(+)
diff --git a/include/drm-uapi/sync_file.h b/include/drm-uapi/sync_file.h
new file mode 100644
index 00000000000..11d86db53e4
--- /dev/null
+++ b/include/drm-uapi/sync_file.h
@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _UAPI_LINUX_SYNC_H
+#define _UAPI_LINUX_SYNC_H
+
+#if defined(__linux__)
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+#else /* One of the BSDs */
+
+#include <sys/types.h>
+#include <sys/ioccom.h>
+
+typedef int8_t __s8;
+typedef uint8_t __u8;
+typedef int16_t __s16;
+typedef uint16_t __u16;
+typedef int32_t __s32;
+typedef uint32_t __u32;
+typedef int64_t __s64;
+typedef uint64_t __u64;
+
+#endif
+
+/**
+ * struct sync_merge_data - data passed to merge ioctl
+ * @name: name of new fence
+ * @fd2: file descriptor of second fence
+ * @fence: returns the fd of the new fence to userspace
+ * @flags: merge_data flags
+ * @pad: padding for 64-bit alignment, should always be zero
+ */
+struct sync_merge_data {
+ char name[32];
+ __s32 fd2;
+ __s32 fence;
+ __u32 flags;
+ __u32 pad;
+};
+
+/**
+ * struct sync_fence_info - detailed fence information
+ * @obj_name: name of parent sync_timeline
+* @driver_name: name of driver implementing the parent
+* @status: status of the fence 0:active 1:signaled <0:error
+ * @flags: fence_info flags
+ * @timestamp_ns: timestamp of status change in nanoseconds
+ */
+struct sync_fence_info {
+ char obj_name[32];
+ char driver_name[32];
+ __s32 status;
+ __u32 flags;
+ __u64 timestamp_ns;
+};
+
+/**
+ * struct sync_file_info - data returned from fence info ioctl
+ * @name: name of fence
+ * @status: status of fence. 1: signaled 0:active <0:error
+ * @flags: sync_file_info flags
+ * @num_fences number of fences in the sync_file
+ * @pad: padding for 64-bit alignment, should always be zero
+ * @sync_fence_info: pointer to array of structs sync_fence_info with all
+ * fences in the sync_file
+ */
+struct sync_file_info {
+ char name[32];
+ __s32 status;
+ __u32 flags;
+ __u32 num_fences;
+ __u32 pad;
+
+ __u64 sync_fence_info;
+};
+
+#define SYNC_IOC_MAGIC '>'
+
+/**
+ * Opcodes 0, 1 and 2 were burned during a API change to avoid users of the
+ * old API to get weird errors when trying to handling sync_files. The API
+ * change happened during the de-stage of the Sync Framework when there was
+ * no upstream users available.
+ */
+
+/**
+ * DOC: SYNC_IOC_MERGE - merge two fences
+ *
+ * Takes a struct sync_merge_data. Creates a new fence containing copies of
+ * the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the
+ * new fence's fd in sync_merge_data.fence
+ */
+#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
+
+/**
+ * DOC: SYNC_IOC_FILE_INFO - get detailed information on a sync_file
+ *
+ * Takes a struct sync_file_info. If num_fences is 0, the field is updated
+ * with the actual number of fences. If num_fences is > 0, the system will
+ * use the pointer provided on sync_fence_info to return up to num_fences of
+ * struct sync_fence_info, with detailed fence information.
+ */
+#define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
+
+#endif /* _UAPI_LINUX_SYNC_H */
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