diff options
Diffstat (limited to 'rtemsbsd/powerpc/include/linux/kthread.h')
| -rw-r--r-- | rtemsbsd/powerpc/include/linux/kthread.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/rtemsbsd/powerpc/include/linux/kthread.h b/rtemsbsd/powerpc/include/linux/kthread.h new file mode 100644 index 00000000..db289dfe --- /dev/null +++ b/rtemsbsd/powerpc/include/linux/kthread.h @@ -0,0 +1,137 @@ +/*- + * Copyright (c) 2010 Isilon Systems, Inc. + * Copyright (c) 2010 iX Systems, Inc. + * Copyright (c) 2010 Panasas, Inc. + * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ +#ifndef _LINUX_KTHREAD_H_ +#define _LINUX_KTHREAD_H_ + +#include <sys/param.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/kernel.h> +#include <sys/kthread.h> +#include <sys/sleepqueue.h> + +#include <machine/rtems-bsd-thread.h> + +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/smp.h> +#include <linux/threads.h> + +#define KTHREAD_LOCK(task) mtx_lock(&(task)->lock) +#define KTHREAD_UNLOCK(task) mtx_unlock(&(task)->lock) + +static inline void +_kthread_fn(void *arg) +{ + struct task_struct *task; + struct thread *c; + + task = arg; + task_struct_set(curthread, task); + c = task->task_thread; + sleepq_lock(c); + while (task->state == TASK_DORMANT) + sleepq_wait(c, 0); + sleepq_release(c); + if (task->should_stop == 0) + task->task_ret = task->task_fn(task->task_data); + KTHREAD_LOCK(task); + task->should_stop = TASK_STOPPED; + wakeup(task); + KTHREAD_UNLOCK(task); + kthread_exit(); +} + +static inline struct task_struct * +_kthread_create(int (*threadfn)(void *data), void *data) +{ + struct task_struct *task; + + task = kzalloc(sizeof(*task), GFP_KERNEL); + task->task_fn = threadfn; + task->task_data = data; + mtx_init(&task->lock, "kthread", NULL, MTX_DEF); + + return (task); +} + +#define kthread_create(fn, data, fmt, ...) \ +({ \ + struct task_struct *_task; \ + \ + _task = _kthread_create((fn), (data)); \ + if (kthread_add(_kthread_fn, _task, NULL, &_task->task_thread, \ + 0, 0, fmt, ## __VA_ARGS__)) { \ + kfree(_task); \ + _task = NULL; \ + } else \ + task_struct_set(_task->task_thread, _task); \ + _task; \ +}) + +#define kthread_should_stop() current->should_stop + +static inline int +kthread_stop(struct task_struct *task) +{ + + KTHREAD_LOCK(task); + task->should_stop = TASK_SHOULD_STOP; + wake_up_process(task); + while (task->should_stop != TASK_STOPPED) + msleep(task, &task->lock, PWAIT, "kstop", hz); + KTHREAD_UNLOCK(task); + return task->task_ret; +} + +static inline void +kthread_bind(struct task_struct *task, unsigned int cpu) +{ + /* FIXME */ + rtems_id task_id = rtems_bsd_get_task_id(task->task_thread); + rtems_id sched_id; + rtems_status_code sc; + rtems_task_priority prio; + + sc = rtems_scheduler_ident(cpu, &sched_id); + if (sc != RTEMS_SUCCESSFUL) + panic("kthread_bind: scheduler ident"); + + sc = rtems_task_set_priority(task_id, RTEMS_CURRENT_PRIORITY, &prio); + if (sc != RTEMS_SUCCESSFUL) + panic("kthread_bind: get priority"); + + sc = rtems_task_set_scheduler(task_id, sched_id, prio); + if (sc != RTEMS_SUCCESSFUL) + panic("kthread_bind: set scheduler"); +} + +#endif /* _LINUX_KTHREAD_H_ */ |