[Intel-gfx] [PATCH i-g-t v2 01/13] lib/sw_sync: Add helper functions for managing synchronization primitives
robert.foss at collabora.com
robert.foss at collabora.com
Mon Sep 12 22:08:30 UTC 2016
From: Robert Foss <robert.foss at collabora.com>
Base functions to help testing the Sync File Framework (explicit fencing
mechanism ported from Android).
These functions allow you to create, use and destroy timelines and fences.
Signed-off-by: Robert Foss <robert.foss at collabora.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
Reviewed-by: Eric Engestrom <eric at engestrom.ch>
---
lib/Makefile.sources | 2 +
lib/sw_sync.c | 237 +++++++++++++++++++++++++++++++++++++++++++++++++++
lib/sw_sync.h | 49 +++++++++++
3 files changed, 288 insertions(+)
create mode 100644 lib/sw_sync.c
create mode 100644 lib/sw_sync.h
diff --git a/lib/Makefile.sources b/lib/Makefile.sources
index bac9a7f..3dc7c3c 100644
--- a/lib/Makefile.sources
+++ b/lib/Makefile.sources
@@ -61,6 +61,8 @@ lib_source_list = \
rendercopy_gen8.c \
rendercopy_gen9.c \
rendercopy.h \
+ sw_sync.c \
+ sw_sync.h \
intel_reg_map.c \
intel_iosf.c \
igt_kms.c \
diff --git a/lib/sw_sync.c b/lib/sw_sync.c
new file mode 100644
index 0000000..179a473
--- /dev/null
+++ b/lib/sw_sync.c
@@ -0,0 +1,237 @@
+/*
+ * Copyright 2012 Google, Inc
+ * Copyright © 2016 Collabora, Ltd.
+ *
+ * Based on the implementation from the Android Open Source Project
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Robert Foss <robert.foss at collabora.com>
+ */
+
+#ifndef ANDROID
+#define _GNU_SOURCE
+#else
+#include <libgen.h>
+#endif
+#include <fcntl.h>
+#include <poll.h>
+#include <stdint.h>
+#include <linux/sync_file.h>
+#include <sys/ioctl.h>
+
+#include "sw_sync.h"
+#include "drmtest.h"
+#include "ioctl_wrappers.h"
+
+#ifndef SW_SYNC_IOC_INC
+struct sw_sync_create_fence_data {
+ __u32 value;
+ char name[32];
+ __s32 fence;
+};
+
+#define SW_SYNC_IOC_MAGIC 'W'
+#define SW_SYNC_IOC_CREATE_FENCE _IOWR(SW_SYNC_IOC_MAGIC, 0,\
+ struct sw_sync_create_fence_data)
+#define SW_SYNC_IOC_INC _IOW(SW_SYNC_IOC_MAGIC, 1, __u32)
+#endif
+
+#define DEVFS_SW_SYNC "/dev/sw_sync"
+#define DEBUGFS_SW_SYNC "/sys/kernel/debug/sync/sw_sync"
+
+
+int sw_sync_fd_is_valid(int fd)
+{
+ int status;
+
+ if (fd < 0)
+ return 0;
+
+ status = fcntl(fd, F_GETFD, 0);
+ return status >= 0;
+}
+
+static
+void sw_sync_fd_close(int fd)
+{
+ if (!sw_sync_fd_is_valid(fd))
+ return;
+
+ close(fd);
+}
+
+int sw_sync_timeline_create(void)
+{
+ int fd = open(DEVFS_SW_SYNC, O_RDWR);
+
+ if (!sw_sync_fd_is_valid(fd))
+ fd = open(DEBUGFS_SW_SYNC, O_RDWR);
+
+ igt_assert(sw_sync_fd_is_valid(fd));
+
+ return fd;
+}
+
+void sw_sync_timeline_destroy(int fd)
+{
+ return sw_sync_fd_close(fd);
+}
+
+void sw_sync_fence_destroy(int fd)
+{
+ return sw_sync_fd_close(fd);
+}
+
+int sw_sync_fence_create(int fd, int32_t seqno)
+{
+ struct sw_sync_create_fence_data data = {};
+ data.value = seqno;
+
+ if (fd >= 0) {
+ do_ioctl(fd, SW_SYNC_IOC_CREATE_FENCE, &data);
+ return data.fence;
+ } else {
+ do_ioctl_err(fd, SW_SYNC_IOC_CREATE_FENCE, &data, EBADF);
+ return -1;
+ }
+}
+
+void sw_sync_timeline_inc(int fd, uint32_t count)
+{
+ uint32_t arg = count;
+
+ if (fd == 0 || fd == -1)
+ return;
+
+ do_ioctl(fd, SW_SYNC_IOC_INC, &arg);
+}
+
+int sw_sync_merge(int fd1, int fd2)
+{
+ struct sync_merge_data data = {};
+ int err;
+
+ data.fd2 = fd2;
+
+ err = ioctl(fd1, SYNC_IOC_MERGE, &data);
+ if (err < 0)
+ return err;
+
+ sw_sync_fd_is_valid(data.fence);
+
+ return data.fence;
+}
+
+int sw_sync_wait(int fence, int timeout)
+{
+ struct pollfd fds;
+ int ret;
+
+ fds.fd = fence;
+ fds.events = POLLIN | POLLERR;
+
+ ret = poll(&fds, 1, timeout);
+
+ return ret;
+}
+
+static struct sync_file_info *sync_file_info(int fd)
+{
+ struct sync_file_info *info;
+ struct sync_fence_info *fence_info;
+ int err, num_fences;
+
+ info = calloc(1, sizeof(*info));
+ if (info == NULL)
+ return NULL;
+
+ err = ioctl(fd, SYNC_IOC_FILE_INFO, info);
+ if (err < 0) {
+ free(info);
+ return NULL;
+ }
+
+ num_fences = info->num_fences;
+
+ if (num_fences) {
+ info->flags = 0;
+ info->num_fences = num_fences;
+
+ fence_info = calloc(num_fences, sizeof(*fence_info));
+ if (!fence_info) {
+ free(info);
+ return NULL;
+ }
+
+ info->sync_fence_info = (uint64_t)(unsigned long) (fence_info);
+
+ err = ioctl(fd, SYNC_IOC_FILE_INFO, info);
+ if (err < 0) {
+ free(fence_info);
+ free(info);
+ return NULL;
+ }
+ }
+
+ return info;
+}
+
+static void sync_file_info_free(struct sync_file_info *info)
+{
+ free((void *)(uintptr_t)info->sync_fence_info);
+ free(info);
+}
+
+int sw_sync_fence_size(int fd)
+{
+ int count;
+ struct sync_file_info *info = sync_file_info(fd);
+
+ if (!info)
+ return 0;
+
+ count = info->num_fences;
+
+ sync_file_info_free(info);
+
+ return count;
+}
+
+int sw_sync_fence_count_status(int fd, int status)
+{
+ int i, count = 0;
+ struct sync_fence_info *fence_info = NULL;
+ struct sync_file_info *info = sync_file_info(fd);
+
+ if (!info)
+ return -1;
+
+ fence_info = (struct sync_fence_info *)(uintptr_t)info->sync_fence_info;
+ for (i = 0 ; i < info->num_fences ; i++) {
+ if (fence_info[i].status == status)
+ count++;
+ }
+
+ sync_file_info_free(info);
+
+ return count;
+}
diff --git a/lib/sw_sync.h b/lib/sw_sync.h
new file mode 100644
index 0000000..1092608
--- /dev/null
+++ b/lib/sw_sync.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2012 Google, Inc
+ * Copyright © 2016 Collabora, Ltd.
+ *
+ * Based on the implementation from the Android Open Source Project
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Robert Foss <robert.foss at collabora.com>
+ */
+
+#ifndef SW_SYNC_H
+#define SW_SYNC_H
+
+#define SW_SYNC_FENCE_STATUS_ERROR (-1)
+#define SW_SYNC_FENCE_STATUS_ACTIVE (0)
+#define SW_SYNC_FENCE_STATUS_SIGNALED (1)
+
+int sw_sync_fd_is_valid(int fd);
+int sw_sync_timeline_create(void);
+void sw_sync_timeline_destroy(int timeline);
+void sw_sync_fence_destroy(int fence);
+int sw_sync_fence_create(int fd, int32_t seqno);
+void sw_sync_timeline_inc(int fd, uint32_t count);
+int sw_sync_merge(int fd1, int fd2);
+int sw_sync_wait(int fence, int timeout);
+int sw_sync_fence_size(int fd);
+int sw_sync_fence_count_status(int fd, int status);
+
+#endif
+
--
2.9.3
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