diff options
Diffstat (limited to 'drivers/staging/hv/osd.c')
| -rw-r--r-- | drivers/staging/hv/osd.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/drivers/staging/hv/osd.c b/drivers/staging/hv/osd.c deleted file mode 100644 index 8c3eb278a81..00000000000 --- a/drivers/staging/hv/osd.c +++ /dev/null @@ -1,228 +0,0 @@ -/* - * - * Copyright (c) 2009, Microsoft Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307 USA. - * - * Authors: - * Haiyang Zhang <haiyangz@microsoft.com> - * Hank Janssen <hjanssen@microsoft.com> - * - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/highmem.h> -#include <linux/vmalloc.h> -#include <linux/ioport.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/wait.h> -#include <linux/spinlock.h> -#include <linux/workqueue.h> -#include <linux/kernel.h> -#include <linux/jiffies.h> -#include <linux/delay.h> -#include <linux/time.h> -#include <linux/io.h> -#include <linux/bitops.h> -#include <linux/slab.h> -#include "osd.h" - -struct osd_callback_struct { - struct work_struct work; - void (*callback)(void *); - void *data; -}; - -void *osd_VirtualAllocExec(unsigned int size) -{ -#ifdef __x86_64__ - return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL_EXEC); -#else - return __vmalloc(size, GFP_KERNEL, - __pgprot(__PAGE_KERNEL & (~_PAGE_NX))); -#endif -} - -/** - * osd_PageAlloc() - Allocate pages - * @count: Total number of Kernel pages you want to allocate - * - * Tries to allocate @count number of consecutive free kernel pages. - * And if successful, it will set the pages to 0 before returning. - * If successfull it will return pointer to the @count pages. - * Mainly used by Hyper-V drivers. - */ -void *osd_PageAlloc(unsigned int count) -{ - void *p; - - p = (void *)__get_free_pages(GFP_KERNEL, get_order(count * PAGE_SIZE)); - if (p) - memset(p, 0, count * PAGE_SIZE); - return p; - - /* struct page* page = alloc_page(GFP_KERNEL|__GFP_ZERO); */ - /* void *p; */ - - /* BUGBUG: We need to use kmap in case we are in HIMEM region */ - /* p = page_address(page); */ - /* if (p) memset(p, 0, PAGE_SIZE); */ - /* return p; */ -} -EXPORT_SYMBOL_GPL(osd_PageAlloc); - -/** - * osd_PageFree() - Free pages - * @page: Pointer to the first page to be freed - * @count: Total number of Kernel pages you free - * - * Frees the pages allocated by osd_PageAlloc() - * Mainly used by Hyper-V drivers. - */ -void osd_PageFree(void *page, unsigned int count) -{ - free_pages((unsigned long)page, get_order(count * PAGE_SIZE)); - /*struct page* p = virt_to_page(page); - __free_page(p);*/ -} -EXPORT_SYMBOL_GPL(osd_PageFree); - -/** - * osd_WaitEventCreate() - Create the event queue - * - * Allocates memory for a &struct osd_waitevent. And then calls - * init_waitqueue_head to set up the wait queue for the event. - * This structure is usually part of a another structure that contains - * the actual Hyper-V device driver structure. - * - * Returns pointer to &struct osd_waitevent - * Mainly used by Hyper-V drivers. - */ -struct osd_waitevent *osd_WaitEventCreate(void) -{ - struct osd_waitevent *wait = kmalloc(sizeof(struct osd_waitevent), - GFP_KERNEL); - if (!wait) - return NULL; - - wait->condition = 0; - init_waitqueue_head(&wait->event); - return wait; -} -EXPORT_SYMBOL_GPL(osd_WaitEventCreate); - - -/** - * osd_WaitEventSet() - Wake up the process - * @waitEvent: Structure to event to be woken up - * - * @waitevent is of type &struct osd_waitevent - * - * Wake up the sleeping process so it can do some work. - * And set condition indicator in &struct osd_waitevent to indicate - * the process is in a woken state. - * - * Only used by Network and Storage Hyper-V drivers. - */ -void osd_WaitEventSet(struct osd_waitevent *waitEvent) -{ - waitEvent->condition = 1; - wake_up_interruptible(&waitEvent->event); -} -EXPORT_SYMBOL_GPL(osd_WaitEventSet); - -/** - * osd_WaitEventWait() - Wait for event till condition is true - * @waitEvent: Structure to event to be put to sleep - * - * @waitevent is of type &struct osd_waitevent - * - * Set up the process to sleep until waitEvent->condition get true. - * And set condition indicator in &struct osd_waitevent to indicate - * the process is in a sleeping state. - * - * Returns the status of 'wait_event_interruptible()' system call - * - * Mainly used by Hyper-V drivers. - */ -int osd_WaitEventWait(struct osd_waitevent *waitEvent) -{ - int ret = 0; - - ret = wait_event_interruptible(waitEvent->event, - waitEvent->condition); - waitEvent->condition = 0; - return ret; -} -EXPORT_SYMBOL_GPL(osd_WaitEventWait); - -/** - * osd_WaitEventWaitEx() - Wait for event or timeout for process wakeup - * @waitEvent: Structure to event to be put to sleep - * @TimeoutInMs: Total number of Milliseconds to wait before waking up - * - * @waitevent is of type &struct osd_waitevent - * Set up the process to sleep until @waitEvent->condition get true or - * @TimeoutInMs (Time out in Milliseconds) has been reached. - * And set condition indicator in &struct osd_waitevent to indicate - * the process is in a sleeping state. - * - * Returns the status of 'wait_event_interruptible_timeout()' system call - * - * Mainly used by Hyper-V drivers. - */ -int osd_WaitEventWaitEx(struct osd_waitevent *waitEvent, u32 TimeoutInMs) -{ - int ret = 0; - - ret = wait_event_interruptible_timeout(waitEvent->event, - waitEvent->condition, - msecs_to_jiffies(TimeoutInMs)); - waitEvent->condition = 0; - return ret; -} -EXPORT_SYMBOL_GPL(osd_WaitEventWaitEx); - -static void osd_callback_work(struct work_struct *work) -{ - struct osd_callback_struct *cb = container_of(work, - struct osd_callback_struct, - work); - (cb->callback)(cb->data); - kfree(cb); -} - -int osd_schedule_callback(struct workqueue_struct *wq, - void (*func)(void *), - void *data) -{ - struct osd_callback_struct *cb; - - cb = kmalloc(sizeof(*cb), GFP_KERNEL); - if (!cb) { - printk(KERN_ERR "unable to allocate memory in osd_schedule_callback\n"); - return -1; - } - - cb->callback = func; - cb->data = data; - INIT_WORK(&cb->work, osd_callback_work); - return queue_work(wq, &cb->work); -} - |