sync code with last improvements from OpenBSD

lib/libdrm/tests/tegra/syncpt-timeout.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright © 2018 NVIDIA Corporation
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "tegra.h"
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+
+static int channel_open(struct drm_tegra *drm,
+                        struct drm_tegra_channel **channel)
+{
+    static const struct {
+        enum drm_tegra_class class;
+        const char *name;
+    } classes[] = {
+        { DRM_TEGRA_VIC,  "VIC"  },
+        { DRM_TEGRA_GR2D, "GR2D" },
+    };
+    unsigned int i;
+    int err;
+
+    for (i = 0; i < ARRAY_SIZE(classes); i++) {
+        err = drm_tegra_channel_open(drm, classes[i].class, channel);
+        if (err < 0) {
+            fprintf(stderr, "failed to open channel to %s: %s\n",
+                    classes[i].name, strerror(-err));
+            continue;
+        }
+
+        break;
+    }
+
+    return err;
+}
+
+int main(int argc, char *argv[])
+{
+    const char *device = "/dev/dri/renderD128";
+    struct drm_tegra_syncpoint *syncpt;
+    struct drm_tegra_channel *channel;
+    struct drm_tegra_pushbuf *pushbuf;
+    struct drm_tegra_job *job;
+    struct drm_tegra *drm;
+    uint32_t *ptr;
+    int fd, err;
+
+    if (argc > 1)
+        device = argv[1];
+
+    fd = open(device, O_RDWR);
+    if (fd < 0) {
+        fprintf(stderr, "open() failed: %s\n", strerror(errno));
+        return 1;
+    }
+
+    err = drm_tegra_new(fd, &drm);
+    if (err < 0) {
+        fprintf(stderr, "failed to open Tegra device: %s\n", strerror(-err));
+        close(fd);
+        return 1;
+    }
+
+    err = drm_tegra_syncpoint_new(drm, &syncpt);
+    if (err < 0) {
+        fprintf(stderr, "failed to allocate syncpoint: %s\n", strerror(-err));
+        drm_tegra_close(drm);
+        close(fd);
+        return 1;
+    }
+
+    err = channel_open(drm, &channel);
+    if (err < 0) {
+        fprintf(stderr, "failed to open channel: %s\n", strerror(-err));
+        return 1;
+    }
+
+    err = drm_tegra_job_new(channel, &job);
+    if (err < 0) {
+        fprintf(stderr, "failed to create job: %s\n", strerror(-err));
+        return 1;
+    }
+
+    err = drm_tegra_job_get_pushbuf(job, &pushbuf);
+    if (err < 0) {
+        fprintf(stderr, "failed to create push buffer: %s\n", strerror(-err));
+        return 1;
+    }
+
+    err = drm_tegra_pushbuf_begin(pushbuf, 8, &ptr);
+    if (err < 0) {
+        fprintf(stderr, "failed to prepare push buffer: %s\n", strerror(-err));
+        return 1;
+    }
+
+    /*
+     * Empty command streams will be rejected, so we use this as an easy way
+     * to add something to the command stream. But this could be any other,
+     * valid command stream.
+     */
+    err = drm_tegra_pushbuf_sync_cond(pushbuf, &ptr, syncpt,
+                                      DRM_TEGRA_SYNC_COND_IMMEDIATE);
+    if (err < 0) {
+        fprintf(stderr, "failed to push syncpoint: %s\n", strerror(-err));
+        return 1;
+    }
+
+    /* pretend that the syncpoint was incremented a second time */
+    err = drm_tegra_pushbuf_sync(pushbuf, syncpt, 1);
+    if (err < 0) {
+        fprintf(stderr, "failed to push syncpoint: %s\n", strerror(-err));
+        return 1;
+    }
+
+    err = drm_tegra_pushbuf_end(pushbuf, ptr);
+    if (err < 0) {
+        fprintf(stderr, "failed to update push buffer: %s\n", strerror(-err));
+        return 1;
+    }
+
+    err = drm_tegra_job_submit(job, NULL);
+    if (err < 0) {
+        fprintf(stderr, "failed to submit job: %s\n", strerror(-err));
+        return 1;
+    }
+
+    err = drm_tegra_job_wait(job, 250000);
+    if (err < 0) {
+        fprintf(stderr, "failed to wait for job: %s\n", strerror(-err));
+        return 1;
+    }
+
+    drm_tegra_job_free(job);
+    drm_tegra_channel_close(channel);
+    drm_tegra_syncpoint_free(syncpt);
+    drm_tegra_close(drm);
+    close(fd);
+
+    return 0;
+}