* Modifications by Mark A. Williamson are (c) Intel Research Cambridge
* Copyright (c) 2004-2005, Christian Limpach
*
- * This file may be distributed separately from the Linux kernel, or
- * incorporated into other software packages, subject to the following license:
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
#define __XEN_DRIVERS_BLOCK_H__
#include <linux/config.h>
+#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/blkdev.h>
#include <linux/major.h>
#include <linux/devfs_fs_kernel.h>
-#include <asm-xen/xen-public/xen.h>
-#include <asm-xen/xen-public/io/blkif.h>
-#include <asm-xen/xen-public/io/ring.h>
+#include <asm/hypervisor.h>
+#include <xen/xenbus.h>
+#include <xen/gnttab.h>
+#include <xen/interface/xen.h>
+#include <xen/interface/io/blkif.h>
+#include <xen/interface/io/ring.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
-#if 0
-#define DPRINTK(_f, _a...) printk ( KERN_ALERT _f , ## _a )
+#if 1
+#define IPRINTK(fmt, args...) \
+ printk(KERN_INFO "xen_blk: " fmt, ##args)
+#else
+#define IPRINTK(fmt, args...) ((void)0)
+#endif
+
+#if 1
+#define WPRINTK(fmt, args...) \
+ printk(KERN_WARNING "xen_blk: " fmt, ##args)
#else
-#define DPRINTK(_f, _a...) ((void)0)
+#define WPRINTK(fmt, args...) ((void)0)
#endif
+#define DPRINTK(_f, _a...) pr_debug(_f, ## _a)
+
#if 0
-#define DPRINTK_IOCTL(_f, _a...) printk ( KERN_ALERT _f , ## _a )
+#define DPRINTK_IOCTL(_f, _a...) printk(KERN_ALERT _f, ## _a)
#else
#define DPRINTK_IOCTL(_f, _a...) ((void)0)
#endif
-struct xlbd_type_info {
- int partn_shift;
- int partn_per_major;
- int devs_per_major;
- char *devname;
- char *diskname;
+struct xlbd_type_info
+{
+ int partn_shift;
+ int disks_per_major;
+ char *devname;
+ char *diskname;
+};
+
+struct xlbd_major_info
+{
+ int major;
+ int index;
+ int usage;
+ struct xlbd_type_info *type;
};
+struct blk_shadow {
+ blkif_request_t req;
+ unsigned long request;
+ unsigned long frame[BLKIF_MAX_SEGMENTS_PER_REQUEST];
+};
+
+#define BLK_RING_SIZE __RING_SIZE((blkif_sring_t *)0, PAGE_SIZE)
+
/*
* We have one of these per vbd, whether ide, scsi or 'other'. They
* hang in private_data off the gendisk structure. We may end up
* putting all kinds of interesting stuff here :-)
*/
-struct xlbd_major_info {
- int major;
- int index;
- int usage;
- struct xlbd_type_info *type;
-};
+struct blkfront_info
+{
+ struct xenbus_device *xbdev;
+ dev_t dev;
+ struct gendisk *gd;
+ int vdevice;
+ blkif_vdev_t handle;
+ int connected;
+ int ring_ref;
+ blkif_front_ring_t ring;
+ unsigned int evtchn, irq;
+ struct xlbd_major_info *mi;
+ request_queue_t *rq;
+ struct work_struct work;
+ struct gnttab_free_callback callback;
+ struct blk_shadow shadow[BLK_RING_SIZE];
+ unsigned long shadow_free;
-struct xlbd_disk_info {
- int xd_device;
- struct xlbd_major_info *mi;
+ /**
+ * The number of people holding this device open. We won't allow a
+ * hot-unplug unless this is 0.
+ */
+ int users;
};
-typedef struct xen_block {
- int usage;
-} xen_block_t;
-
-extern struct request_queue *xlbd_blk_queue;
extern spinlock_t blkif_io_lock;
extern int blkif_open(struct inode *inode, struct file *filep);
extern int blkif_release(struct inode *inode, struct file *filep);
extern int blkif_ioctl(struct inode *inode, struct file *filep,
- unsigned command, unsigned long argument);
+ unsigned command, unsigned long argument);
+extern int blkif_getgeo(struct block_device *, struct hd_geometry *);
extern int blkif_check(dev_t dev);
extern int blkif_revalidate(dev_t dev);
-extern void blkif_control_send(blkif_request_t *req, blkif_response_t *rsp);
-#ifdef CONFIG_XEN_BLKDEV_GRANT
-extern void blkif_control_probe_send(
- blkif_request_t *req, blkif_response_t *rsp, unsigned long address);
-#endif
-extern void do_blkif_request (request_queue_t *rq);
-
-extern void xlvbd_update_vbds(void);
+extern void do_blkif_request (request_queue_t *rq);
/* Virtual block-device subsystem. */
-extern int xlvbd_init(void);
-extern void xlvbd_cleanup(void);
+/* Note that xlvbd_add doesn't call add_disk for you: you're expected
+ to call add_disk on info->gd once the disk is properly connected
+ up. */
+int xlvbd_add(blkif_sector_t capacity, int device,
+ u16 vdisk_info, u16 sector_size, struct blkfront_info *info);
+void xlvbd_del(struct blkfront_info *info);
#endif /* __XEN_DRIVERS_BLOCK_H__ */
git://git.onelab.eu / linux-2.6.git / blobdiff