9952f6918d
Based on 1 normalized pattern(s): 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 you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Tegra host1x Syncpoints
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*
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* Copyright (c) 2010-2013, NVIDIA Corporation.
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*/
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#ifndef __HOST1X_SYNCPT_H
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#define __HOST1X_SYNCPT_H
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#include <linux/atomic.h>
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#include <linux/host1x.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include "intr.h"
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struct host1x;
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/* Reserved for replacing an expired wait with a NOP */
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#define HOST1X_SYNCPT_RESERVED 0
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struct host1x_syncpt_base {
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unsigned int id;
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bool requested;
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};
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struct host1x_syncpt {
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unsigned int id;
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atomic_t min_val;
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atomic_t max_val;
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u32 base_val;
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const char *name;
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bool client_managed;
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struct host1x *host;
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struct host1x_client *client;
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struct host1x_syncpt_base *base;
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/* interrupt data */
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struct host1x_syncpt_intr intr;
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};
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/* Initialize sync point array */
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int host1x_syncpt_init(struct host1x *host);
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/* Free sync point array */
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void host1x_syncpt_deinit(struct host1x *host);
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/* Return number of sync point supported. */
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unsigned int host1x_syncpt_nb_pts(struct host1x *host);
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/* Return number of wait bases supported. */
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unsigned int host1x_syncpt_nb_bases(struct host1x *host);
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/* Return number of mlocks supported. */
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unsigned int host1x_syncpt_nb_mlocks(struct host1x *host);
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/*
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* Check sync point sanity. If max is larger than min, there have too many
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* sync point increments.
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*
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* Client managed sync point are not tracked.
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* */
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static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real)
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{
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u32 max;
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if (sp->client_managed)
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return true;
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max = host1x_syncpt_read_max(sp);
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return (s32)(max - real) >= 0;
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}
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/* Return true if sync point is client managed. */
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static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp)
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{
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return sp->client_managed;
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}
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/*
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* Returns true if syncpoint min == max, which means that there are no
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* outstanding operations.
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*/
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static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp)
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{
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int min, max;
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smp_rmb();
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min = atomic_read(&sp->min_val);
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max = atomic_read(&sp->max_val);
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return (min == max);
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}
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/* Load current value from hardware to the shadow register. */
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u32 host1x_syncpt_load(struct host1x_syncpt *sp);
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/* Check if the given syncpoint value has already passed */
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bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh);
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/* Save host1x sync point state into shadow registers. */
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void host1x_syncpt_save(struct host1x *host);
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/* Reset host1x sync point state from shadow registers. */
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void host1x_syncpt_restore(struct host1x *host);
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/* Read current wait base value into shadow register and return it. */
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u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp);
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/* Indicate future operations by incrementing the sync point max. */
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u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
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/* Check if sync point id is valid. */
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static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp)
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{
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return sp->id < host1x_syncpt_nb_pts(sp->host);
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}
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#endif
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