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When moving compression state tracking and compbit management ops to kernel, we need to attach a fence to dma-buf metadata, along with the compbit state. To make in-kernel fence management easier, introduce a new gk20a_fence abstraction. A gk20a_fence may be backed by a semaphore or a syncpoint (id, value) pair. If the kernel is configured with CONFIG_SYNC, it will also contain a sync_fence. The gk20a_fence can easily be converted back to a syncpoint (id, value) parir or sync FD when we need to return it to user space. Change gk20a_submit_channel_gpfifo to return a gk20a_fence instead of nvhost_fence. This is to facilitate work submission initiated from kernel. Bug 1509620 Change-Id: I6154764a279dba83f5e91ba9e0cb5e227ca08e1b Signed-off-by: Lauri Peltonen <lpeltonen@nvidia.com> Reviewed-on: http://git-master/r/439846 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/*
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* drivers/video/tegra/host/gk20a/channel_sync_gk20a.h
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*
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* GK20A Channel Synchronization Abstraction
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*
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* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _GK20A_CHANNEL_SYNC_H_
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#define _GK20A_CHANNEL_SYNC_H_
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#include <linux/types.h>
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struct gk20a_channel_sync;
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struct priv_cmd_entry;
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struct channel_gk20a;
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struct gk20a_semaphore;
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struct gk20a_fence;
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struct gk20a_channel_sync {
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/* Generate a gpu wait cmdbuf from syncpoint.
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* Returns
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* - a gpu cmdbuf that performs the wait when executed,
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* - possibly a helper fence that the caller must hold until the
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* cmdbuf is executed.
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*/
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int (*wait_syncpt)(struct gk20a_channel_sync *s, u32 id, u32 thresh,
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struct priv_cmd_entry **entry,
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struct gk20a_fence **fence);
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/* Generate a gpu wait cmdbuf from sync fd.
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* Returns
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* - a gpu cmdbuf that performs the wait when executed,
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* - possibly a helper fence that the caller must hold until the
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* cmdbuf is executed.
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*/
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int (*wait_fd)(struct gk20a_channel_sync *s, int fd,
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struct priv_cmd_entry **entry,
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struct gk20a_fence **fence);
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/* Increment syncpoint/semaphore.
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* Returns
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* - a gpu cmdbuf that performs the increment when executed,
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* - a fence that can be passed to wait_cpu() and is_expired().
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*/
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int (*incr)(struct gk20a_channel_sync *s,
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struct priv_cmd_entry **entry,
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struct gk20a_fence **fence);
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/* Increment syncpoint/semaphore, preceded by a wfi.
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* Returns
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* - a gpu cmdbuf that performs the increment when executed,
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* - a fence that can be passed to wait_cpu() and is_expired().
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*/
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int (*incr_wfi)(struct gk20a_channel_sync *s,
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struct priv_cmd_entry **entry,
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struct gk20a_fence **fence);
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/* Increment syncpoint/semaphore, so that the returned fence represents
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* work completion (may need wfi) and can be returned to user space.
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* Returns
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* - a gpu cmdbuf that performs the increment when executed,
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* - a fence that can be passed to wait_cpu() and is_expired(),
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* - a gk20a_fence that signals when the incr has happened.
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*/
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int (*incr_user)(struct gk20a_channel_sync *s,
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int wait_fence_fd,
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struct priv_cmd_entry **entry,
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struct gk20a_fence **fence,
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bool wfi);
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/* Reset the channel syncpoint/semaphore. */
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void (*set_min_eq_max)(struct gk20a_channel_sync *s);
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/* Signals the sync timeline (if owned by the gk20a_channel_sync layer).
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* This should be called when we notice that a gk20a_fence is
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* expired. */
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void (*signal_timeline)(struct gk20a_channel_sync *s);
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/* flag to set sync destroy aggressiveness */
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bool aggressive_destroy;
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/* Free the resources allocated by gk20a_channel_sync_create. */
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void (*destroy)(struct gk20a_channel_sync *s);
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};
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struct gk20a_channel_sync *gk20a_channel_sync_create(struct channel_gk20a *c);
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#endif
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