diff options
Diffstat (limited to 'drivers/staging/hv/osd.h')
| -rw-r--r-- | drivers/staging/hv/osd.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/staging/hv/osd.h b/drivers/staging/hv/osd.h new file mode 100644 index 000000000000..9504604c72bd --- /dev/null +++ b/drivers/staging/hv/osd.h @@ -0,0 +1,69 @@ +/* + * + * 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> + * + */ + + +#ifndef _OSD_H_ +#define _OSD_H_ + + +/* Defines */ +#define ALIGN_UP(value, align) (((value) & (align-1)) ? \ + (((value) + (align-1)) & ~(align-1)) : \ + (value)) +#define ALIGN_DOWN(value, align) ((value) & ~(align-1)) +#define NUM_PAGES_SPANNED(addr, len) ((ALIGN_UP(addr+len, PAGE_SIZE) - \ + ALIGN_DOWN(addr, PAGE_SIZE)) >> \ + PAGE_SHIFT) + +#define LOWORD(dw) ((unsigned short)(dw)) +#define HIWORD(dw) ((unsigned short)(((unsigned int) (dw) >> 16) & 0xFFFF)) + +struct hv_guid { + unsigned char data[16]; +}; + +struct osd_waitevent { + int condition; + wait_queue_head_t event; +}; + +/* Osd routines */ + +extern void *osd_VirtualAllocExec(unsigned int size); + +extern void *osd_PageAlloc(unsigned int count); +extern void osd_PageFree(void *page, unsigned int count); + +extern struct osd_waitevent *osd_WaitEventCreate(void); +extern void osd_WaitEventSet(struct osd_waitevent *waitEvent); +extern int osd_WaitEventWait(struct osd_waitevent *waitEvent); + +/* If >0, waitEvent got signaled. If ==0, timeout. If < 0, error */ +extern int osd_WaitEventWaitEx(struct osd_waitevent *waitEvent, + u32 TimeoutInMs); + +int osd_schedule_callback(struct workqueue_struct *wq, + void (*func)(void *), + void *data); + +#endif /* _OSD_H_ */ |