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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/infiniband/sw/rxe/rxe_task.h | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_task.h')
-rw-r--r-- | drivers/infiniband/sw/rxe/rxe_task.h | 96 |
1 files changed, 96 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..08ff42d45 --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_task.h @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#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 + * fcn => 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(unsigned long data); + +/* 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 */ |