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/*
* drivers/video/tegra/host/nvhost_syncpt.h
*
* Tegra Graphics Host Syncpoints
*
* Copyright (c) 2010-2011, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __NVHOST_SYNCPT_H
#define __NVHOST_SYNCPT_H
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/nvhost.h>
#include <mach/nvmap.h>
#include <asm/atomic.h>
struct nvhost_syncpt;
struct nvhost_waitchk;
/* host managed and invalid syncpt id */
#define NVSYNCPT_GRAPHICS_HOST (0)
#define NVSYNCPT_INVALID (-1)
struct nvhost_syncpt {
atomic_t *min_val;
atomic_t *max_val;
u32 *base_val;
u32 nb_pts;
u32 nb_bases;
u32 client_managed;
};
int nvhost_syncpt_init(struct nvhost_syncpt *);
#define client_managed(id) (BIT(id) & sp->client_managed)
#define syncpt_to_dev(sp) container_of(sp, struct nvhost_master, syncpt)
#define syncpt_op(sp) (syncpt_to_dev(sp)->op.syncpt)
#define SYNCPT_CHECK_PERIOD 2*HZ
/**
* Updates the value sent to hardware.
*/
static inline u32 nvhost_syncpt_incr_max(struct nvhost_syncpt *sp,
u32 id, u32 incrs)
{
return (u32)atomic_add_return(incrs, &sp->max_val[id]);
}
/**
* Updated the value sent to hardware.
*/
static inline u32 nvhost_syncpt_set_max(struct nvhost_syncpt *sp,
u32 id, u32 val)
{
atomic_set(&sp->max_val[id], val);
smp_wmb();
return val;
}
static inline u32 nvhost_syncpt_read_max(struct nvhost_syncpt *sp, u32 id)
{
smp_rmb();
return (u32)atomic_read(&sp->max_val[id]);
}
static inline u32 nvhost_syncpt_read_min(struct nvhost_syncpt *sp, u32 id)
{
smp_rmb();
return (u32)atomic_read(&sp->min_val[id]);
}
static inline bool nvhost_syncpt_check_max(struct nvhost_syncpt *sp,
u32 id, u32 real)
{
u32 max;
if (client_managed(id))
return true;
max = nvhost_syncpt_read_max(sp, id);
return (s32)(max - real) >= 0;
}
/**
* Returns true if syncpoint has reached threshold
*/
static inline bool nvhost_syncpt_min_cmp(struct nvhost_syncpt *sp,
u32 id, u32 thresh)
{
u32 cur;
smp_rmb();
cur = (u32)atomic_read(&sp->min_val[id]);
return ((s32)(cur - thresh) >= 0);
}
/**
* Returns true if syncpoint min == max
*/
static inline bool nvhost_syncpt_min_eq_max(struct nvhost_syncpt *sp, u32 id)
{
int min, max;
smp_rmb();
min = atomic_read(&sp->min_val[id]);
max = atomic_read(&sp->max_val[id]);
return (min == max);
}
void nvhost_syncpt_cpu_incr(struct nvhost_syncpt *sp, u32 id);
u32 nvhost_syncpt_update_min(struct nvhost_syncpt *sp, u32 id);
void nvhost_syncpt_save(struct nvhost_syncpt *sp);
void nvhost_syncpt_reset(struct nvhost_syncpt *sp);
u32 nvhost_syncpt_read(struct nvhost_syncpt *sp, u32 id);
u32 nvhost_syncpt_read_wait_base(struct nvhost_syncpt *sp, u32 id);
void nvhost_syncpt_incr(struct nvhost_syncpt *sp, u32 id);
int nvhost_syncpt_wait_timeout(struct nvhost_syncpt *sp, u32 id, u32 thresh,
u32 timeout, u32 *value);
static inline int nvhost_syncpt_wait(struct nvhost_syncpt *sp, u32 id, u32 thresh)
{
return nvhost_syncpt_wait_timeout(sp, id, thresh,
MAX_SCHEDULE_TIMEOUT, NULL);
}
/*
* Check driver supplied waitchk structs for syncpt thresholds
* that have already been satisfied and NULL the comparison (to
* avoid a wrap condition in the HW).
*
* @param: sp - global shadowed syncpt struct
* @param: nvmap - needed to access command buffer
* @param: mask - bit mask of syncpt IDs referenced in WAITs
* @param: wait - start of filled in array of waitchk structs
* @param: waitend - end ptr (one beyond last valid waitchk)
*/
int nvhost_syncpt_wait_check(struct nvhost_syncpt *sp,
struct nvmap_client *nvmap,
u32 mask,
struct nvhost_waitchk *wait,
struct nvhost_waitchk *waitend);
const char *nvhost_syncpt_name(u32 id);
void nvhost_syncpt_debug(struct nvhost_syncpt *sp);
#endif
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