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| author | Stefan Weinhuber <wein@de.ibm.com> | 2009-03-26 17:23:48 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-26 17:24:05 +0300 |
| commit | f3eb5384cf0325c02e306b1d81e70f81a03d7432 (patch) | |
| tree | 4d75517ad2c61ac2f8b6431eafd62b5d32c188ed /arch/s390 | |
| parent | b44b0ab3bac16356f03e94b1b49ba9305710c445 (diff) | |
| download | linux-f3eb5384cf0325c02e306b1d81e70f81a03d7432.tar.xz | |
[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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/idals.h | 17 |
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; } |