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 10 enum { 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 */ 24 struct rxe_task { 25 struct tasklet_struct tasklet; 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 35 /* 36 * init rxe_task structure 37 * qp => parameter to pass to func 38 * func => function to call until it returns != 0 39 */ 40 int rxe_init_task(struct rxe_task *task, struct rxe_qp *qp, 41 int (*func)(struct rxe_qp *)); 42 43 /* cleanup task */ 44 void rxe_cleanup_task(struct rxe_task *task); 45 46 void rxe_run_task(struct rxe_task *task); 47 48 void rxe_sched_task(struct rxe_task *task); 49 50 /* keep a task from scheduling */ 51 void rxe_disable_task(struct rxe_task *task); 52 53 /* allow task to run */ 54 void rxe_enable_task(struct rxe_task *task); 55 56 #endif /* RXE_TASK_H */ 57