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| author | Stefan Weinhuber <wein@de.ibm.com> | 2009-03-26 15:23:48 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-26 15:24:05 +0100 |
| commit | f3eb5384cf0325c02e306b1d81e70f81a03d7432 (patch) | |
| tree | 4d75517ad2c61ac2f8b6431eafd62b5d32c188ed /drivers/s390/block/dasd_devmap.c | |
| parent | [S390] dasd: add large volume support (diff) | |
| download | linux-f3eb5384cf0325c02e306b1d81e70f81a03d7432.tar.xz linux-f3eb5384cf0325c02e306b1d81e70f81a03d7432.zip | |
[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 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 34339902efb9..da231a787cee 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -67,6 +67,8 @@ int dasd_probeonly = 0; /* is true, when probeonly mode is active */ int dasd_autodetect = 0; /* is true, when autodetection is active */ int dasd_nopav = 0; /* is true, when PAV is disabled */ EXPORT_SYMBOL_GPL(dasd_nopav); +int dasd_nofcx; /* disable High Performance Ficon */ +EXPORT_SYMBOL_GPL(dasd_nofcx); /* * char *dasd[] is intended to hold the ranges supplied by the dasd= statement @@ -272,6 +274,11 @@ dasd_parse_keyword( char *parsestring ) { } return residual_str; } + if (strncmp("nofcx", parsestring, length) == 0) { + dasd_nofcx = 1; + MESSAGE(KERN_INFO, "%s", "disable High Performance Ficon"); + return residual_str; + } if (strncmp("fixedbuffers", parsestring, length) == 0) { if (dasd_page_cache) return residual_str; |