[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, 5 insertions, 12 deletions

diff --git a/arch/s390/include/asm/idals.h b/arch/s390/include/asm/idals.h
index e82c10efe65a..aae276d00383 100644
--- a/arch/s390/include/asm/idals.h
+++ b/arch/s390/include/asm/idals.h
@@ -44,24 +44,18 @@ idal_is_needed(void *vaddr, unsigned int length)
 /*
  * Return the number of idal words needed for an address/length pair.
  */
-static inline unsigned int
-idal_nr_words(void *vaddr, unsigned int length)
+static inline unsigned int idal_nr_words(void *vaddr, unsigned int length)
 {
-#ifdef __s390x__
-        if (idal_is_needed(vaddr, length))
-                return ((__pa(vaddr) & (IDA_BLOCK_SIZE-1)) + length + 
-                        (IDA_BLOCK_SIZE-1)) >> IDA_SIZE_LOG;
-#endif
-        return 0;
+        return ((__pa(vaddr) & (IDA_BLOCK_SIZE-1)) + length +
+                (IDA_BLOCK_SIZE-1)) >> IDA_SIZE_LOG;
 }
 
 /*
  * Create the list of idal words for an address/length pair.
  */
-static inline unsigned long *
-idal_create_words(unsigned long *idaws, void *vaddr, unsigned int length)
+static inline unsigned long *idal_create_words(unsigned long *idaws,
+                                               void *vaddr, unsigned int length)
 {
-#ifdef __s390x__
         unsigned long paddr;
         unsigned int cidaw;
 
@@ -74,7 +68,6 @@ idal_create_words(unsigned long *idaws, void *vaddr, unsigned int length)
                 paddr += IDA_BLOCK_SIZE;
                 *idaws++ = paddr;
         }
-#endif
         return idaws;
 }