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[S390] cio: Rework css driver.

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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>
This commit is contained in:
Cornelia Huck
2008-07-14 09:58:45 +02:00
committed by Heiko Carstens
parent 7e9db9eaef
commit c820de39bd
9 changed files with 382 additions and 511 deletions
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20
drivers/s390/cio/chp.c
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@@ -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);