tegra: Add job and push buffer APIs

These new functions can be used to create a job on a given channel, add
commands to the job using its push buffer and submit the job.

Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 164 insertions, 0 deletions

diff --git a/tegra/job.c b/tegra/job.c
new file mode 100644
index 00000000..c8c94e13
--- /dev/null
+++ b/tegra/job.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright © 2012, 2013 Thierry Reding
+ * Copyright © 2013 Erik Faye-Lund
+ * Copyright © 2014 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+
+#include "private.h"
+
+struct drm_tegra_submit_cmd *
+drm_tegra_job_add_command(struct drm_tegra_job *job, uint32_t type,
+                          uint32_t flags)
+{
+    struct drm_tegra_submit_cmd *commands, *command;
+    size_t size;
+
+    size = (job->num_commands + 1) * sizeof(*commands);
+
+    commands = realloc(job->commands, size);
+    if (!commands)
+        return NULL;
+
+    command = &commands[job->num_commands];
+    memset(command, 0, sizeof(*command));
+    command->type = type;
+    command->flags = flags;
+
+    job->commands = commands;
+    job->num_commands++;
+
+    return command;
+}
+
+drm_public int
+drm_tegra_job_new(struct drm_tegra_channel *channel,
+                  struct drm_tegra_job **jobp)
+{
+    struct drm_tegra_job *job;
+
+    job = calloc(1, sizeof(*job));
+    if (!job)
+        return -ENOMEM;
+
+    job->page_size = sysconf(_SC_PAGESIZE);
+    job->channel = channel;
+
+    *jobp = job;
+
+    return 0;
+}
+
+drm_public int drm_tegra_job_free(struct drm_tegra_job *job)
+{
+    if (!job)
+        return -EINVAL;
+
+    if (job->pushbuf)
+        drm_tegra_pushbuf_free(job->pushbuf);
+
+    if (job->commands)
+        free(job->commands);
+
+    if (job->buffers)
+        free(job->buffers);
+
+    free(job);
+
+    return 0;
+}
+
+drm_public int
+drm_tegra_job_get_pushbuf(struct drm_tegra_job *job,
+                          struct drm_tegra_pushbuf **pushbufp)
+{
+    struct drm_tegra_pushbuf *pushbuf;
+
+    if (!job->pushbuf) {
+        pushbuf = calloc(1, sizeof(*pushbuf));
+        if (!pushbuf)
+            return -ENOMEM;
+
+        pushbuf->job = job;
+
+        pushbuf->start = calloc(1, job->page_size);
+        if (!pushbuf->start) {
+            free(pushbuf);
+            return -ENOMEM;
+        }
+
+        pushbuf->end = pushbuf->start + job->page_size / 4;
+        pushbuf->ptr = pushbuf->start;
+
+        job->pushbuf = pushbuf;
+    }
+
+    *pushbufp = job->pushbuf;
+
+    return 0;
+}
+
+drm_public int
+drm_tegra_job_submit(struct drm_tegra_job *job, struct drm_tegra_fence *fence)
+{
+    struct drm_tegra_channel *channel = job->channel;
+    struct drm_tegra *drm = channel->drm;
+    struct drm_tegra_channel_submit args;
+    int err;
+
+    memset(&args, 0, sizeof(args));
+    args.context = channel->context;
+    args.num_bufs = job->num_buffers;
+    args.num_cmds = job->num_commands;
+    args.gather_data_words = job->pushbuf->ptr - job->pushbuf->start;
+    args.syncpt.id = job->syncpt.id;
+    args.syncpt.increments = job->syncpt.increments;
+
+    args.bufs_ptr = (uintptr_t)job->buffers;
+    args.cmds_ptr = (uintptr_t)job->commands;
+    args.gather_data_ptr = (uintptr_t)job->pushbuf->start;
+
+    err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_SUBMIT, &args);
+    if (err < 0)
+        return -errno;
+
+    job->syncpt.fence = args.syncpt.value;
+
+    if (fence) {
+        fence->drm = drm;
+        fence->syncpt = job->syncpt.id;
+        fence->value = job->syncpt.fence;
+    }
+
+    return 0;
+}