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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2008-07-14 09:58:45 +0200 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-07-14 10:02:05 +0200 |
| commit | c820de39bd083222f5be2563181c87493e436f7c (patch) | |
| tree | 4861db1aeca00d55d76b5844ad209d81a2795105 /drivers/s390/cio/chp.c | |
| parent | [S390] cio: Introduce modalias for css bus. (diff) | |
| download | linux-c820de39bd083222f5be2563181c87493e436f7c.tar.xz linux-c820de39bd083222f5be2563181c87493e436f7c.zip | |
[S390] cio: Rework css driver.
Rework the css driver methods to provide sane callbacks for
subchannels of all types.
As a bonus, this cleans up and simplyfies the machine check
handling for I/O subchannels a lot.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chp.c')
| -rw-r--r-- | drivers/s390/cio/chp.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c index 297cdceb0ca4..297f1653b52b 100644 --- a/drivers/s390/cio/chp.c +++ b/drivers/s390/cio/chp.c @@ -496,6 +496,26 @@ void chp_process_crw(int id, int status) chsc_chp_offline(chpid); } +int chp_ssd_get_mask(struct chsc_ssd_info *ssd, struct res_acc_data *data) +{ + int i; + int mask; + + for (i = 0; i < 8; i++) { + mask = 0x80 >> i; + if (!(ssd->path_mask & mask)) + continue; + if (!chp_id_is_equal(&ssd->chpid[i], &data->chpid)) + continue; + if ((ssd->fla_valid_mask & mask) && + ((ssd->fla[i] & data->fla_mask) != data->fla)) + continue; + return mask; + } + return 0; +} +EXPORT_SYMBOL_GPL(chp_ssd_get_mask); + static inline int info_bit_num(struct chp_id id) { return id.id + id.cssid * (__MAX_CHPID + 1); |