1 files changed, 78 insertions, 0 deletions
diff --git a/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/block.h b/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/block.h
new file mode 100644
index 0000000000..627055bf0b
--- /dev/null
+++ b/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/block.h
@@ -0,0 +1,78 @@
+/******************************************************************************
+ * block.h
+ *
+ * Block IO communication rings.
+ *
+ * These are the ring data structures for buffering messages between 
+ * the hypervisor and guestos's.  
+ *
+ */
+
+#ifndef __BLOCK_H__
+#define __BLOCK_H__
+
+#include <linux/kdev_t.h>
+
+/* the first four definitions match fs.h */
+#define XEN_BLOCK_READ  0
+#define XEN_BLOCK_WRITE 1
+#define XEN_BLOCK_READA 2                                /* currently unused */
+#define XEN_BLOCK_SPECIAL 4                              /* currently unused */
+#define XEN_BLOCK_PROBE 8      /* determine io configuration from hypervisor */
+#define XEN_BLOCK_DEBUG 16                                          /* debug */
+
+#define BLK_RING_SIZE        128
+#define BLK_RING_MAX_ENTRIES (BLK_RING_SIZE - 2)
+#define BLK_RING_INC(_i)     (((_i)+1) & (BLK_RING_SIZE-1))
+#define BLK_RING_ADD(_i,_j)  (((_i)+(_j)) & (BLK_RING_SIZE-1))
+
+typedef struct blk_ring_req_entry 
+{
+    void *          id;                /* for guest os use */
+    int             operation;         /* XEN_BLOCK_READ or XEN_BLOCK_WRITE */
+    char *          buffer;
+    unsigned long   block_number;      /* block number */
+    unsigned short  block_size;        /* block size */
+    kdev_t          device;
+    unsigned long   sector_number;     /* real buffer location on disk */
+} blk_ring_req_entry_t;
+
+typedef struct blk_ring_resp_entry
+{
+    void *id;
+    unsigned long status;
+} blk_ring_resp_entry_t;
+
+typedef struct blk_ring_st 
+{
+    unsigned int req_prod;  /* Request producer. Updated by guest OS. */
+    unsigned int resp_prod; /* Response producer. Updated by Xen.     */
+    union {
+        blk_ring_req_entry_t  req;
+        blk_ring_resp_entry_t resp;
+    } ring[BLK_RING_SIZE];
+} blk_ring_t;
+
+#define MAX_XEN_DISK_COUNT 100
+
+#define XEN_DISK_IDE  1
+#define XEN_DISK_SCSI 2
+
+typedef struct xen_disk                                     /* physical disk */
+{
+  int           type;                                           /* disk type */
+  unsigned long capacity;
+  unsigned char heads;                               /* hdreg.h::hd_geometry */
+  unsigned char sectors;                             /* hdreg.h::hd_geometry */
+  unsigned int  cylinders;                       /* hdreg.h::hd_big_geometry */
+  unsigned long start;                               /* hdreg.h::hd_geometry */
+  void *        gendisk;                               /* struct gendisk ptr */
+} xen_disk_t;
+
+typedef struct xen_disk_info
+{
+  int         count; /* number of subsequent xen_disk_t structures to follow */
+  xen_disk_t  disks[100];
+} xen_disk_info_t;
+
+#endif