gpu: nvgpu: Add NVIDIA GPU Driver

This patch moves the NVIDIA GPU driver to a new location.

Bug 1482562

Change-Id: I24293810b9d0f1504fd9be00135e21dad656ccb6
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/383722
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.h
new file mode 100644
index 00000000..69feb89f
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.h
@@ -0,0 +1,102 @@
+/*
+ * drivers/video/tegra/host/gk20a/channel_sync_gk20a.h
+ *
+ * GK20A Channel Synchronization Abstraction
+ *
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 _GK20A_CHANNEL_SYNC_H_
+#define _GK20A_CHANNEL_SYNC_H_
+
+#include <linux/types.h>
+
+struct gk20a_channel_sync;
+struct priv_cmd_entry;
+struct channel_gk20a;
+
+struct gk20a_channel_fence {
+        bool valid;
+        bool wfi; /* was issued with preceding wfi */
+        u32 thresh; /* either semaphore or syncpoint value */
+};
+
+struct gk20a_channel_sync {
+        /* CPU wait for a fence returned by incr_syncpt() or incr_fd(). */
+        int (*wait_cpu)(struct gk20a_channel_sync *s,
+                        struct gk20a_channel_fence *fence,
+                        int timeout);
+
+        /* Test whether a fence returned by incr_syncpt() or incr_fd() is
+         * expired. */
+        bool (*is_expired)(struct gk20a_channel_sync *s,
+                           struct gk20a_channel_fence *fence);
+
+        /* Generate a gpu wait cmdbuf from syncpoint. */
+        int (*wait_syncpt)(struct gk20a_channel_sync *s, u32 id, u32 thresh,
+                           struct priv_cmd_entry **entry);
+
+        /* Generate a gpu wait cmdbuf from sync fd. */
+        int (*wait_fd)(struct gk20a_channel_sync *s, int fd,
+                       struct priv_cmd_entry **entry);
+
+        /* Increment syncpoint/semaphore.
+         * Returns
+         *  - a gpu cmdbuf that performs the increment when executed,
+         *  - a fence that can be passed to wait_cpu() and is_expired().
+         */
+        int (*incr)(struct gk20a_channel_sync *s,
+                    struct priv_cmd_entry **entry,
+                    struct gk20a_channel_fence *fence);
+
+        /* Increment syncpoint/semaphore, preceded by a wfi.
+         * Returns
+         *  - a gpu cmdbuf that performs the increment when executed,
+         *  - a fence that can be passed to wait_cpu() and is_expired().
+         */
+        int (*incr_wfi)(struct gk20a_channel_sync *s,
+                        struct priv_cmd_entry **entry,
+                        struct gk20a_channel_fence *fence);
+
+        /* Increment syncpoint, so that the returned fence represents
+         * work completion (may need wfi) and can be returned to user space.
+         * Returns
+         *  - a gpu cmdbuf that performs the increment when executed,
+         *  - a fence that can be passed to wait_cpu() and is_expired(),
+         *  - a syncpoint id/value pair that can be returned to user space.
+         */
+        int (*incr_user_syncpt)(struct gk20a_channel_sync *s,
+                                struct priv_cmd_entry **entry,
+                                struct gk20a_channel_fence *fence,
+                                u32 *id, u32 *thresh);
+
+        /* Increment syncpoint/semaphore, so that the returned fence represents
+         * work completion (may need wfi) and can be returned to user space.
+         * Returns
+         *  - a gpu cmdbuf that performs the increment when executed,
+         *  - a fence that can be passed to wait_cpu() and is_expired(),
+         *  - a sync fd that can be returned to user space.
+         */
+        int (*incr_user_fd)(struct gk20a_channel_sync *s,
+                            struct priv_cmd_entry **entry,
+                            struct gk20a_channel_fence *fence,
+                            int *fd);
+
+        /* Reset the channel syncpoint/semaphore. */
+        void (*set_min_eq_max)(struct gk20a_channel_sync *s);
+
+        /* Free the resources allocated by gk20a_channel_sync_create. */
+        void (*destroy)(struct gk20a_channel_sync *s);
+};
+
+struct gk20a_channel_sync *gk20a_channel_sync_create(struct channel_gk20a *c);
+#endif