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91724953fd
Add infrastructure to allow freeing gpu channels' syncpts at channel_unbind() Currently, we free the syncpt at channel_free() only. But we can free the syncpt when channel becomes idle. When we do channel_unbind(), channel cannot be scheduled and hence we can destroy its syncpt. Channel will request again for new syncpt when it has new work to do. This feature will be enabled with boolean flag syncpt_aggressive_destroy Bug 1305024 Change-Id: Ib498e2c371e36ffc1430d4f95f2780b4c587e43e Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/395153 Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
106 lines
3.5 KiB
C
106 lines
3.5 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_channel_fence {
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bool valid;
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bool wfi; /* was issued with preceding wfi */
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u32 thresh; /* either semaphore or syncpoint value */
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};
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struct gk20a_channel_sync {
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/* CPU wait for a fence returned by incr_syncpt() or incr_fd(). */
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int (*wait_cpu)(struct gk20a_channel_sync *s,
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struct gk20a_channel_fence *fence,
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int timeout);
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/* Test whether a fence returned by incr_syncpt() or incr_fd() is
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* expired. */
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bool (*is_expired)(struct gk20a_channel_sync *s,
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struct gk20a_channel_fence *fence);
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/* Generate a gpu wait cmdbuf from syncpoint. */
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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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/* Generate a gpu wait cmdbuf from sync fd. */
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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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/* 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_channel_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_channel_fence *fence);
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/* Increment syncpoint, 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 syncpoint id/value pair that can be returned to user space.
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*/
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int (*incr_user_syncpt)(struct gk20a_channel_sync *s,
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struct priv_cmd_entry **entry,
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struct gk20a_channel_fence *fence,
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u32 *id, u32 *thresh);
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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 sync fd that can be returned to user space.
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*/
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int (*incr_user_fd)(struct gk20a_channel_sync *s,
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struct priv_cmd_entry **entry,
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struct gk20a_channel_fence *fence,
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int *fd);
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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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/* flag to set syncpt destroy aggressiveness */
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bool syncpt_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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