[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 e82c10efe65..aae276d0038 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;
 }