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| author | Stefan Haberland <sth@linux.vnet.ibm.com> | 2016-08-08 15:56:54 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-12-12 12:05:03 +0100 |
| commit | a521b048bc8c5d3c57a468c2cba70eb60e873616 (patch) | |
| tree | d84e42b5653a1761a5cf7307ab4fef0e884f1c07 /arch/s390 | |
| parent | c93461515a1a16486f4e483cb34170366fa73ea1 (diff) | |
| download | linux-a521b048bc8c5d3c57a468c2cba70eb60e873616.tar.bz2 | |
s390/dasd: channel path aware error recovery
With this feature, the DASD device driver more robustly handles DASDs
that are attached via multiple channel paths and are subject to
constant Interface-Control-Checks (IFCCs) and Channel-Control-Checks
(CCCs) or loss of High-Performance-FICON (HPF) functionality on one or
more of these paths.
If a channel path does not work correctly, it is removed from normal
operation as long as other channel paths are available. All extended
error recovery states can be queried and reset via user space
interfaces.
Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/scsw.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/s390/include/asm/scsw.h b/arch/s390/include/asm/scsw.h index 4af99cdaddf5..17a7904f001a 100644 --- a/arch/s390/include/asm/scsw.h +++ b/arch/s390/include/asm/scsw.h @@ -96,7 +96,8 @@ struct tm_scsw { u32 dstat:8; u32 cstat:8; u32 fcxs:8; - u32 schxs:8; + u32 ifob:1; + u32 sesq:7; } __attribute__ ((packed)); /** @@ -177,6 +178,9 @@ union scsw { #define SCHN_STAT_INTF_CTRL_CHK 0x02 #define SCHN_STAT_CHAIN_CHECK 0x01 +#define SCSW_SESQ_DEV_NOFCX 3 +#define SCSW_SESQ_PATH_NOFCX 4 + /* * architectured values for first sense byte */ |