1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2/*
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 */
6
7#ifndef RXE_TASK_H
8#define RXE_TASK_H
9
10enum {
11 TASK_STATE_IDLE = 0,
12 TASK_STATE_BUSY = 1,
13 TASK_STATE_ARMED = 2,
14 TASK_STATE_DRAINING = 3,
15 TASK_STATE_DRAINED = 4,
16 TASK_STATE_INVALID = 5,
17};
18
19/*
20 * data structure to describe a 'task' which is a short
21 * function that returns 0 as long as it needs to be
22 * called again.
23 */
24struct rxe_task {
25 struct work_struct work;
26 int state;
27 spinlock_t lock;
28 struct rxe_qp *qp;
29 int (*func)(struct rxe_qp *qp);
30 int ret;
31 long num_sched;
32 long num_done;
33};
34
35int rxe_alloc_wq(void);
36
37void rxe_destroy_wq(void);
38
39/*
40 * init rxe_task structure
41 * qp => parameter to pass to func
42 * func => function to call until it returns != 0
43 */
44int rxe_init_task(struct rxe_task *task, struct rxe_qp *qp,
45 int (*func)(struct rxe_qp *));
46
47/* cleanup task */
48void rxe_cleanup_task(struct rxe_task *task);
49
50void rxe_sched_task(struct rxe_task *task);
51
52/* keep a task from scheduling */
53void rxe_disable_task(struct rxe_task *task);
54
55/* allow task to run */
56void rxe_enable_task(struct rxe_task *task);
57
58#endif /* RXE_TASK_H */
59

source code of linux/drivers/infiniband/sw/rxe/rxe_task.h