From e905bfe81bd404bca00dcaa0f6b9fc56d46cfe95 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= <jose.souza@intel.com>
Date: Fri, 22 Dec 2023 09:49:36 -0800
Subject: [PATCH] intel/common: Add functions to handle async vm bind
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Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26805>
---
 src/intel/common/intel_bind_timeline.c | 79 ++++++++++++++++++++++++++
 src/intel/common/intel_bind_timeline.h | 25 ++++++++
 src/intel/common/meson.build           |  2 +
 3 files changed, 106 insertions(+)
 create mode 100644 src/intel/common/intel_bind_timeline.c
 create mode 100644 src/intel/common/intel_bind_timeline.h

diff --git a/src/intel/common/intel_bind_timeline.c b/src/intel/common/intel_bind_timeline.c
new file mode 100644
index 00000000000..f96158339a5
--- /dev/null
+++ b/src/intel/common/intel_bind_timeline.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2023 Intel Corporation
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "intel_bind_timeline.h"
+
+#include "drm-uapi/drm.h"
+#include "intel_gem.h"
+
+bool intel_bind_timeline_init(struct intel_bind_timeline *bind_timeline, int fd)
+{
+   struct drm_syncobj_create syncobj_create = { .flags = DRM_SYNCOBJ_CREATE_SIGNALED };
+
+   if (intel_ioctl(fd, DRM_IOCTL_SYNCOBJ_CREATE, &syncobj_create))
+      return false;
+
+   simple_mtx_init(&bind_timeline->mutex, mtx_plain);
+   bind_timeline->syncobj = syncobj_create.handle;
+   bind_timeline->point = 0;
+
+   return true;
+}
+
+void intel_bind_timeline_finish(struct intel_bind_timeline *bind_timeline, int fd)
+{
+   if (bind_timeline->syncobj == 0)
+      return;
+
+   uint64_t point = intel_bind_timeline_get_last_point(bind_timeline);
+   struct drm_syncobj_timeline_wait syncobj_wait = {
+      .timeout_nsec = INT64_MAX,
+      .handles = (uintptr_t)&bind_timeline->syncobj,
+      .count_handles = 1,
+      .points = (uintptr_t)&point,
+   };
+   struct drm_syncobj_destroy syncobj_destroy = {
+      .handle = bind_timeline->syncobj,
+   };
+
+   /* Makes sure last unbind was signaled otherwise it can trigger job
+    * timeouts in KMD
+    */
+   intel_ioctl(fd, DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, &syncobj_wait);
+   intel_ioctl(fd, DRM_IOCTL_SYNCOBJ_DESTROY, &syncobj_destroy);
+
+   simple_mtx_destroy(&bind_timeline->mutex);
+}
+
+uint32_t intel_bind_timeline_get_syncobj(struct intel_bind_timeline *bind_timeline)
+{
+   return bind_timeline->syncobj;
+}
+
+uint64_t intel_bind_timeline_bind_begin(struct intel_bind_timeline *bind_timeline)
+{
+   simple_mtx_lock(&bind_timeline->mutex);
+   return ++bind_timeline->point;
+}
+
+void intel_bind_timeline_bind_end(struct intel_bind_timeline *bind_timeline)
+{
+   simple_mtx_unlock(&bind_timeline->mutex);
+}
+
+/*
+ * Returns the timeline point that should be waited on before execute any
+ * batch buffers.
+ */
+uint64_t intel_bind_timeline_get_last_point(struct intel_bind_timeline *bind_timeline)
+{
+   uint64_t ret;
+
+   simple_mtx_lock(&bind_timeline->mutex);
+   ret = bind_timeline->point;
+   simple_mtx_unlock(&bind_timeline->mutex);
+
+   return ret;
+}
diff --git a/src/intel/common/intel_bind_timeline.h b/src/intel/common/intel_bind_timeline.h
new file mode 100644
index 00000000000..faeb73e52fd
--- /dev/null
+++ b/src/intel/common/intel_bind_timeline.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2023 Intel Corporation
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "util/simple_mtx.h"
+
+struct intel_bind_timeline {
+   simple_mtx_t mutex;
+   uint32_t syncobj;
+   uint64_t point;
+};
+
+bool intel_bind_timeline_init(struct intel_bind_timeline *intel_bind_timeline, int fd);
+void intel_bind_timeline_finish(struct intel_bind_timeline *bind_timeline, int fd);
+
+uint64_t intel_bind_timeline_bind_begin(struct intel_bind_timeline *bind_timeline);
+void intel_bind_timeline_bind_end(struct intel_bind_timeline *bind_timeline);
+uint32_t intel_bind_timeline_get_syncobj(struct intel_bind_timeline *bind_timeline);
+uint64_t intel_bind_timeline_get_last_point(struct intel_bind_timeline *bind_timeline);
diff --git a/src/intel/common/meson.build b/src/intel/common/meson.build
index 979ca09cb82..491ed159c01 100644
--- a/src/intel/common/meson.build
+++ b/src/intel/common/meson.build
@@ -33,6 +33,8 @@ files_libintel_common = files(
   'xe/intel_gem.h',
   'intel_aux_map.c',
   'intel_aux_map.h',
+  'intel_bind_timeline.c',
+  'intel_bind_timeline.h',
   'intel_buffer_alloc.h',
   'intel_decoder.h',
   'intel_disasm.c',