- Merge in OFED 1.5.3 from projects/ofed/head

1 files changed, 191 insertions, 0 deletions

diff --git a/sys/ofed/include/linux/workqueue.h b/sys/ofed/include/linux/workqueue.h
new file mode 100644
index 0000000..6b48f9c
--- /dev/null
+++ b/sys/ofed/include/linux/workqueue.h
@@ -0,0 +1,191 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * 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.
+ */
+#ifndef	_LINUX_WORKQUEUE_H_
+#define	_LINUX_WORKQUEUE_H_
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+
+#include <sys/taskqueue.h>
+
+struct workqueue_struct {
+	struct taskqueue	*taskqueue;
+};
+
+struct work_struct {
+	struct	task 		work_task;
+	struct	taskqueue	*taskqueue;
+	void			(*fn)(struct work_struct *);
+};
+
+struct delayed_work {
+	struct work_struct	work;
+	struct callout		timer;
+};
+
+static inline struct delayed_work *
+to_delayed_work(struct work_struct *work)
+{
+
+ 	return container_of(work, struct delayed_work, work);
+}
+
+
+static inline void
+_work_fn(void *context, int pending)
+{
+	struct work_struct *work;
+
+	work = context;
+	work->fn(work);
+}
+
+#define	INIT_WORK(work, func) 	 					\
+do {									\
+	(work)->fn = (func);						\
+	(work)->taskqueue = NULL;					\
+	TASK_INIT(&(work)->work_task, 0, _work_fn, (work));		\
+} while (0)
+
+#define	INIT_DELAYED_WORK(_work, func)					\
+do {									\
+	INIT_WORK(&(_work)->work, func);				\
+	callout_init(&(_work)->timer, CALLOUT_MPSAFE);			\
+} while (0)
+
+#define	INIT_DELAYED_WORK_DEFERRABLE	INIT_DELAYED_WORK
+
+#define	schedule_work(work)						\
+do {									\
+	(work)->taskqueue = taskqueue_thread;				\
+	taskqueue_enqueue(taskqueue_thread, &(work)->work_task);	\
+} while (0)
+
+#define	flush_scheduled_work()	flush_taskqueue(taskqueue_thread)
+
+#define	queue_work(q, work)						\
+do {									\
+	(work)->taskqueue = (q)->taskqueue;				\
+	taskqueue_enqueue((q)->taskqueue, &(work)->work_task);		\
+} while (0)
+
+static inline void
+_delayed_work_fn(void *arg)
+{
+	struct delayed_work *work;
+
+	work = arg;
+	taskqueue_enqueue(work->work.taskqueue, &work->work.work_task);
+}
+
+static inline int
+queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *work,
+    unsigned long delay)
+{
+	int pending;
+
+	pending = work->work.work_task.ta_pending;
+	work->work.taskqueue = wq->taskqueue;
+	if (delay != 0)
+		callout_reset(&work->timer, delay, _delayed_work_fn, work);
+	else
+		_delayed_work_fn((void *)work);
+
+	return (!pending);
+}
+
+static inline struct workqueue_struct *
+_create_workqueue_common(char *name, int cpus)
+{
+	struct workqueue_struct *wq;
+
+	wq = kmalloc(sizeof(*wq), M_WAITOK);
+	wq->taskqueue = taskqueue_create((name), M_WAITOK,
+	    taskqueue_thread_enqueue,  &wq->taskqueue);
+	taskqueue_start_threads(&wq->taskqueue, cpus, PWAIT, (name));
+
+	return (wq);
+}
+
+
+#define	create_singlethread_workqueue(name)				\
+	_create_workqueue_common(name, 1)
+
+#define	create_workqueue(name)						\
+	_create_workqueue_common(name, MAXCPU)
+
+static inline void
+destroy_workqueue(struct workqueue_struct *wq)
+{
+	taskqueue_free(wq->taskqueue);
+	kfree(wq);
+}
+
+#define	flush_workqueue(wq)	flush_taskqueue((wq)->taskqueue)
+
+static inline void
+_flush_fn(void *context, int pending)
+{
+}
+
+static inline void
+flush_taskqueue(struct taskqueue *tq)
+{
+	struct task flushtask;
+
+	TASK_INIT(&flushtask, 0, _flush_fn, NULL);
+	taskqueue_enqueue(tq, &flushtask);
+	taskqueue_drain(tq, &flushtask);
+}
+
+static inline int
+cancel_work_sync(struct work_struct *work)
+{
+	if (work->taskqueue &&
+	    taskqueue_cancel(work->taskqueue, &work->work_task, NULL))
+		taskqueue_drain(work->taskqueue, &work->work_task);
+	return 0;
+}
+
+/*
+ * This may leave work running on another CPU as it does on Linux.
+ */
+static inline int
+cancel_delayed_work(struct delayed_work *work)
+{
+
+	callout_stop(&work->timer);
+	if (work->work.taskqueue &&
+	    taskqueue_cancel(work->work.taskqueue, &work->work.work_task, NULL))
+		taskqueue_drain(work->work.taskqueue, &work->work.work_task);
+	return 0;
+}
+
+#endif	/* _LINUX_WORKQUEUE_H_ */