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e0c9da1fe9
We currently free sync when we find job list empty If aggressive_sync is set to true, we try to free sync during channel unbind() call But we rarely free sync from channel_unbind() call since freeing it when job list is empty is aggressive enough Hence remove sync free code from channel_unbind() Implement refcounting for sync: - get a refcount while submitting a job (and allocate sync if it is not allocated already) - put a refcount while freeing the job - if refcount==0 and if aggressive_sync_destroy is set, free the sync - if aggressive_sync_destroy is not set, we will free the sync during channel close time Bug 200187553 Change-Id: I74e24adb15dc26a375ebca1fdd017b3ad6d57b61 Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/1120410 Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
104 lines
3.4 KiB
C
104 lines
3.4 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) 2014-2015, 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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atomic_t refcount;
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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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bool need_sync_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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bool need_sync_fence);
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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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/* Returns the sync point id or negative number if no syncpt*/
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int (*syncpt_id)(struct gk20a_channel_sync *s);
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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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void gk20a_channel_sync_destroy(struct gk20a_channel_sync *sync);
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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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