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[S390] dasd: add High Performance FICON support

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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>
This commit is contained in:
Stefan Weinhuber
2009-03-26 15:23:48 +01:00
committed by Martin Schwidefsky
parent b44b0ab3ba
commit f3eb5384cf
9 changed files with 1122 additions and 174 deletions
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17
arch/s390/include/asm/idals.h
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@@ -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;
}