[S390] dasd: add High Performance FICON support

To support High Performance FICON, the DASD device driver has to
translate I/O requests into the new transport mode control words (TCW)
instead of the traditional (command mode) CCW requests.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 29991a9fa07a..7b314c1d471e 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -157,7 +157,8 @@ struct dasd_ccw_req {
         struct dasd_block *block;       /* the originating block device */
         struct dasd_device *memdev;     /* the device used to allocate this */
         struct dasd_device *startdev;   /* device the request is started on */
-        struct ccw1 *cpaddr;            /* address of channel program */
+        void *cpaddr;                   /* address of ccw or tcw */
+        unsigned char cpmode;           /* 0 = cmd mode, 1 = itcw */
         char status;                    /* status of this request */
         short retries;                  /* A retry counter */
         unsigned long flags;            /* flags of this request */
@@ -573,12 +574,14 @@ int dasd_generic_notify(struct ccw_device *, int);
 void dasd_generic_handle_state_change(struct dasd_device *);
 
 int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int);
+char *dasd_get_sense(struct irb *);
 
 /* externals in dasd_devmap.c */
 extern int dasd_max_devindex;
 extern int dasd_probeonly;
 extern int dasd_autodetect;
 extern int dasd_nopav;
+extern int dasd_nofcx;
 
 int dasd_devmap_init(void);
 void dasd_devmap_exit(void);