[PATCH] s390: 64 bit diag250 support

Add support for diag 250 access to dasd devices for 64 bit kernels.  In
addition fix detach/attach for diag disks.  The VM control block needs to get
recreated by a call to mdsk_init_io.

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 94 insertions, 11 deletions

diff --git a/drivers/s390/block/dasd_diag.h b/drivers/s390/block/dasd_diag.h
index a0c38e303979..b26eb28df4bf 100644
--- a/drivers/s390/block/dasd_diag.h
+++ b/drivers/s390/block/dasd_diag.h
@@ -6,7 +6,7 @@
  * Bugreports.to..: <Linux390@de.ibm.com>
  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
  *
- * $Revision: 1.6 $
+ * $Revision: 1.7 $
  */
 
 #define MDSK_WRITE_REQ 0x01
@@ -19,6 +19,18 @@
 #define DEV_CLASS_FBA   0x01
 #define DEV_CLASS_ECKD  0x04
 
+#define DASD_DIAG_LC_INT_CODE           132
+#define DASD_DIAG_LC_INT_STATUS         133
+#define DASD_DIAG_LC_INT_PARM_31BIT     128
+#define DASD_DIAG_LC_INT_PARM_64BIT     4536
+#define DASD_DIAG_CODE_31BIT            0x03
+#define DASD_DIAG_CODE_64BIT            0x07
+
+#define DASD_DIAG_RWFLAG_ASYNC          0x02
+#define DASD_DIAG_RWFLAG_NOCACHE        0x01
+
+#define DASD_DIAG_FLAGA_FORMAT_64BIT    0x80
+
 struct dasd_diag_characteristics {
         u16 dev_nr;
         u16 rdc_len;
@@ -32,35 +44,106 @@ struct dasd_diag_characteristics {
         u8 rdev_features;
 } __attribute__ ((packed, aligned(4)));
 
+struct dasd_diag_cms_label {
+        u8 label_id[4];
+        u8 vol_id[6];
+        u16 version_id;
+        u32 block_size;
+        u32 origin_ptr;
+        u32 usable_count;
+        u32 formatted_count;
+        u32 block_count;
+        u32 used_count;
+        u32 fst_size;
+        u32 fst_count;
+        u8 format_date[6];
+        u8 reserved1[2];
+        u32 disk_offset;
+        u32 map_block;
+        u32 hblk_disp;
+        u32 user_disp;
+        u8 reserved2[4];
+        u8 segment_name[8];
+} __attribute__ ((packed));
+
+#ifdef CONFIG_ARCH_S390X
+#define DASD_DIAG_FLAGA_DEFAULT         DASD_DIAG_FLAGA_FORMAT_64BIT
+
+typedef u64 blocknum_t;
+typedef s64 sblocknum_t;
+
+struct dasd_diag_bio {
+        u8 type;
+        u8 status;
+        u8 spare1[2];
+        u32 alet;
+        blocknum_t block_number;
+        u64 buffer;
+} __attribute__ ((packed, aligned(8)));
+
+struct dasd_diag_init_io {
+        u16 dev_nr;
+        u8 flaga;
+        u8 spare1[21];
+        u32 block_size;
+        u8 spare2[4];
+        blocknum_t offset;
+        sblocknum_t start_block;
+        blocknum_t end_block;
+        u8  spare3[8];
+} __attribute__ ((packed, aligned(8)));
+
+struct dasd_diag_rw_io {
+        u16 dev_nr;
+        u8  flaga;
+        u8  spare1[21];
+        u8  key;
+        u8  flags;
+        u8  spare2[2];
+        u32 block_count;
+        u32 alet;
+        u8  spare3[4];
+        u64 interrupt_params;
+        u64 bio_list;
+        u8  spare4[8];
+} __attribute__ ((packed, aligned(8)));
+#else /* CONFIG_ARCH_S390X */
+#define DASD_DIAG_FLAGA_DEFAULT         0x0
+
+typedef u32 blocknum_t;
+typedef s32 sblocknum_t;
+
 struct dasd_diag_bio {
         u8 type;
         u8 status;
         u16 spare1;
-        u32 block_number;
+        blocknum_t block_number;
         u32 alet;
         u32 buffer;
 } __attribute__ ((packed, aligned(8)));
 
 struct dasd_diag_init_io {
         u16 dev_nr;
-        u16 spare1[11];
+        u8 flaga;
+        u8 spare1[21];
         u32 block_size;
-        u32 offset;
-        u32 start_block;
-        u32 end_block;
-        u32 spare2[6];
+        blocknum_t offset;
+        sblocknum_t start_block;
+        blocknum_t end_block;
+        u8 spare2[24];
 } __attribute__ ((packed, aligned(8)));
 
 struct dasd_diag_rw_io {
         u16 dev_nr;
-        u16 spare1[11];
+        u8 flaga;
+        u8 spare1[21];
         u8 key;
         u8 flags;
-        u16 spare2;
+        u8 spare2[2];
         u32 block_count;
         u32 alet;
         u32 bio_list;
         u32 interrupt_params;
-        u32 spare3[5];
+        u8 spare3[20];
 } __attribute__ ((packed, aligned(8)));
-
+#endif /* CONFIG_ARCH_S390X */