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/******************************************************************************
* xl_block.h
*
* Shared definitions between all levels of XenoLinux Virtual block devices.
*/
#ifndef __XL_BLOCK_H__
#define __XL_BLOCK_H__
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/hdreg.h>
#include <linux/blkdev.h>
#include <linux/major.h>
#include <asm/hypervisor-ifs/block.h>
#include <asm/hypervisor-ifs/hypervisor-if.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
#if 0
#define DPRINTK(_f, _a...) printk ( KERN_ALERT _f , ## _a )
#else
#define DPRINTK(_f, _a...) ((void)0)
#endif
#if 0
#define DPRINTK_IOCTL(_f, _a...) printk ( KERN_ALERT _f , ## _a )
#else
#define DPRINTK_IOCTL(_f, _a...) ((void)0)
#endif
/* XL IDE and SCSI use same major/minor numbers as normal Linux devices. */
#define XLIDE_MAJOR_0 IDE0_MAJOR
#define XLIDE_MAJOR_1 IDE1_MAJOR
#define XLSCSI_MAJOR SCSI_DISK0_MAJOR
#define XLIDE_PARTN_SHIFT 6
#define XLSCSI_PARTN_SHIFT 4
#define XLVIRT_PARTN_SHIFT 4
static inline int PARTN_SHIFT(kdev_t dev)
{
switch ( MAJOR(dev) )
{
case XLIDE_MAJOR_0:
case XLIDE_MAJOR_1:
return XLIDE_PARTN_SHIFT;
case XLSCSI_MAJOR:
return XLSCSI_PARTN_SHIFT;
case XLVIRT_MAJOR:
return XLVIRT_PARTN_SHIFT;
default:
BUG();
}
}
#define XLIDE_DEVS_PER_MAJOR 2
#define XLSCSI_DEVS_PER_MAJOR 16
#define XLVIRT_DEVS_PER_MAJOR 16
/*
* We have one of these per XL-IDE, XL-SCSI, and XL-VIRT device.
* They hang in an array off the gendisk structure. We may end up putting
* all kinds of interesting stuff here :-)
*/
typedef struct xl_disk {
int usage;
unsigned long capacity;
} xl_disk_t;
/* Generic layer. */
extern int xenolinux_control_msg(int operration, char *buffer, int size);
extern int xenolinux_block_open(struct inode *inode, struct file *filep);
extern int xenolinux_block_release(struct inode *inode, struct file *filep);
extern int xenolinux_block_ioctl(struct inode *inode, struct file *filep,
unsigned command, unsigned long argument);
extern int xenolinux_block_check(kdev_t dev);
extern int xenolinux_block_revalidate(kdev_t dev);
extern void do_xlblk_request (request_queue_t *rq);
/* Fake IDE subsystem. */
extern int xlide_init(xen_disk_info_t *xdi);
extern int xlide_hwsect(int minor);
extern void xlide_cleanup(void);
extern struct gendisk *xlide_gendisk[];
/* Fake SCSI subsystem. */
extern int xlscsi_init(xen_disk_info_t *xdi);
extern int xlscsi_hwsect(int minor);
extern void xlscsi_cleanup(void);
extern struct gendisk *xlscsi_gendisk;
/* Virtual block-device subsystem. */
extern int xlsegment_hwsect(int minor);
extern struct gendisk *xlsegment_gendisk;
#endif /* __XL_BLOCK_H__ */
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