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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#ifndef RXE_TASK_H
#define RXE_TASK_H
enum {
TASK_STATE_START = 0,
TASK_STATE_BUSY = 1,
TASK_STATE_ARMED = 2,
};
/*
* data structure to describe a 'task' which is a short
* function that returns 0 as long as it needs to be
* called again.
*/
struct rxe_task {
void *obj;
struct tasklet_struct tasklet;
int state;
spinlock_t state_lock; /* spinlock for task state */
void *arg;
int (*func)(void *arg);
int ret;
char name[16];
bool destroyed;
};
/*
* init rxe_task structure
* arg => parameter to pass to fcn
* func => function to call until it returns != 0
*/
int rxe_init_task(void *obj, struct rxe_task *task,
void *arg, int (*func)(void *), char *name);
/* cleanup task */
void rxe_cleanup_task(struct rxe_task *task);
/*
* raw call to func in loop without any checking
* can call when tasklets are disabled
*/
int __rxe_do_task(struct rxe_task *task);
/*
* common function called by any of the main tasklets
* If there is any chance that there is additional
* work to do someone must reschedule the task before
* leaving
*/
void rxe_do_task(struct tasklet_struct *t);
/* run a task, else schedule it to run as a tasklet, The decision
* to run or schedule tasklet is based on the parameter sched.
*/
void rxe_run_task(struct rxe_task *task, int sched);
/* keep a task from scheduling */
void rxe_disable_task(struct rxe_task *task);
/* allow task to run */
void rxe_enable_task(struct rxe_task *task);
#endif /* RXE_TASK_H */
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