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Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_task.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_task.h b/drivers/infiniband/sw/rxe/rxe_task.h new file mode 100644 index 000000000..b3dfd970d --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_task.h @@ -0,0 +1,66 @@ +/* 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 { + struct tasklet_struct tasklet; + int state; + spinlock_t state_lock; /* spinlock for task state */ + void *arg; + int (*func)(void *arg); + int ret; + bool destroyed; +}; + +/* + * init rxe_task structure + * arg => parameter to pass to fcn + * func => function to call until it returns != 0 + */ +int rxe_init_task(struct rxe_task *task, void *arg, int (*func)(void *)); + +/* 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 */ |