131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Tegra host1x Syncpoints
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010-2013, NVIDIA Corporation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __HOST1X_SYNCPT_H
|
||
|
|
#define __HOST1X_SYNCPT_H
|
||
|
|
|
||
|
|
#include <linux/atomic.h>
|
||
|
|
#include <linux/host1x.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/kref.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 {
|
||
|
|
struct kref ref;
|
||
|
|
|
||
|
|
unsigned int id;
|
||
|
|
atomic_t min_val;
|
||
|
|
atomic_t max_val;
|
||
|
|
u32 base_val;
|
||
|
|
const char *name;
|
||
|
|
bool client_managed;
|
||
|
|
struct host1x *host;
|
||
|
|
struct host1x_syncpt_base *base;
|
||
|
|
|
||
|
|
/* interrupt data */
|
||
|
|
struct host1x_syncpt_intr intr;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If a submission incrementing this syncpoint fails, lock it so that
|
||
|
|
* further submission cannot be made until application has handled the
|
||
|
|
* failure.
|
||
|
|
*/
|
||
|
|
bool locked;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* 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. */
|
||
|
|
unsigned int host1x_syncpt_nb_pts(struct host1x *host);
|
||
|
|
|
||
|
|
/* Return number of wait bases supported. */
|
||
|
|
unsigned int host1x_syncpt_nb_bases(struct host1x *host);
|
||
|
|
|
||
|
|
/* Return number of mlocks supported. */
|
||
|
|
unsigned 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);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void host1x_syncpt_set_locked(struct host1x_syncpt *sp)
|
||
|
|
{
|
||
|
|
sp->locked = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|