166 lines
4.6 KiB
C
166 lines
4.6 KiB
C
/*
|
|
* 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/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 {
|
|
int id;
|
|
atomic_t min_val;
|
|
atomic_t max_val;
|
|
u32 base_val;
|
|
const char *name;
|
|
int client_managed;
|
|
struct host1x *host;
|
|
struct device *dev;
|
|
|
|
/* 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);
|
|
|
|
/*
|
|
* Read max. It indicates how many operations there are in queue, either in
|
|
* channel or in a software thread.
|
|
* */
|
|
static inline u32 host1x_syncpt_read_max(struct host1x_syncpt *sp)
|
|
{
|
|
smp_rmb();
|
|
return (u32)atomic_read(&sp->max_val);
|
|
}
|
|
|
|
/*
|
|
* Read min, which is a shadow of the current sync point value in hardware.
|
|
*/
|
|
static inline u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
|
|
{
|
|
smp_rmb();
|
|
return (u32)atomic_read(&sp->min_val);
|
|
}
|
|
|
|
/* 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 int 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);
|
|
}
|
|
|
|
/* Return pointer to struct denoting sync point id. */
|
|
struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, u32 id);
|
|
|
|
/* Request incrementing a sync point. */
|
|
void host1x_syncpt_cpu_incr(struct host1x_syncpt *sp);
|
|
|
|
/* 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);
|
|
|
|
/* Increment sync point and its max. */
|
|
void host1x_syncpt_incr(struct host1x_syncpt *sp);
|
|
|
|
/* Indicate future operations by incrementing the sync point max. */
|
|
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
|
|
|
|
/* Wait until sync point reaches a threshold value, or a timeout. */
|
|
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh,
|
|
long timeout, u32 *value);
|
|
|
|
/* 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);
|
|
|
|
/* Return id of the sync point */
|
|
u32 host1x_syncpt_id(struct host1x_syncpt *sp);
|
|
|
|
/* Allocate a sync point for a device. */
|
|
struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
|
|
int client_managed);
|
|
|
|
/* Free a sync point. */
|
|
void host1x_syncpt_free(struct host1x_syncpt *sp);
|
|
|
|
#endif
|