/* * Tegra host1x Syncpoints * * Copyright (c) 2010-2013, NVIDIA Corporation. * * 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/>. */ #ifndef __HOST1X_SYNCPT_H#define __HOST1X_SYNCPT_H #include <linux/atomic.h>#include <linux/host1x.h>#include <linux/kernel.h>#include <linux/sched.h> #include "intr.h" struct host1x; /* Reserved for replacing an expired wait with a NOP */#define HOST1X_SYNCPT_RESERVED			0 struct host1x_syncpt_base {	unsigned int id;	bool requested;}; struct host1x_syncpt {	int id;	atomic_t min_val;	atomic_t max_val;	u32 base_val;	const char *name;	bool client_managed;	struct host1x *host;	struct device *dev;	struct host1x_syncpt_base *base; 	/* interrupt data */	struct host1x_syncpt_intr intr;}; /* Initialize sync point array  */int host1x_syncpt_init(struct host1x *host); /*  Free sync point array */void host1x_syncpt_deinit(struct host1x *host); /* Return number of sync point supported. */int host1x_syncpt_nb_pts(struct host1x *host); /* Return number of wait bases supported. */int host1x_syncpt_nb_bases(struct host1x *host); /* Return number of mlocks supported. */int host1x_syncpt_nb_mlocks(struct host1x *host); /* * Check sync point sanity. If max is larger than min, there have too many * sync point increments. * * Client managed sync point are not tracked. * */static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real){	u32 max;	if (sp->client_managed)		return true;	max = host1x_syncpt_read_max(sp);	return (s32)(max - real) >= 0;} /* Return true if sync point is client managed. */static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp){	return sp->client_managed;} /* * Returns true if syncpoint min == max, which means that there are no * outstanding operations. */static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp){	int min, max;	smp_rmb();	min = atomic_read(&sp->min_val);	max = atomic_read(&sp->max_val);	return (min == max);} /* Load current value from hardware to the shadow register. */u32 host1x_syncpt_load(struct host1x_syncpt *sp); /* Check if the given syncpoint value has already passed */bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh); /* Save host1x sync point state into shadow registers. */void host1x_syncpt_save(struct host1x *host); /* Reset host1x sync point state from shadow registers. */void host1x_syncpt_restore(struct host1x *host); /* Read current wait base value into shadow register and return it. */u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp); /* Indicate future operations by incrementing the sync point max. */u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs); /* Check if sync point id is valid. */static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp){	return sp->id < host1x_syncpt_nb_pts(sp->host);} /* Patch a wait by replacing it with a wait for syncpt 0 value 0 */int host1x_syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr); #endif