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s390/cio: collect format 1 channel-path description data 

Collect format 1 channel-path description data for each CHPID
and update the information in one place.

Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2013-03-11 12:58:18 +01:00 committed by Martin Schwidefsky
parent a75a282d72
commit cce0eacc22
4 changed files with 31 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/s390/cio/chp.c
View File

@ -376,6 +376,26 @@ static void chp_release(struct device *dev)
kfree(cp);
}
/**
* chp_update_desc - update channel-path description
* @chp - channel-path
*
* Update the channel-path description of the specified channel-path.
* Return zero on success, non-zero otherwise.
*/
int chp_update_desc(struct channel_path *chp)
{
int rc;
rc = chsc_determine_base_channel_path_desc(chp->chpid, &chp->desc);
if (rc)
return rc;
rc = chsc_determine_fmt1_channel_path_desc(chp->chpid, &chp->desc_fmt1);
return rc;
}
/**
* chp_new - register a new channel-path
* @chpid - channel-path ID
@ -403,7 +423,7 @@ int chp_new(struct chp_id chpid)
mutex_init(&chp->lock);
/* Obtain channel path description and fill it in. */
ret = chsc_determine_base_channel_path_desc(chpid, &chp->desc);
ret = chp_update_desc(chp);
if (ret)
goto out_free;
if ((chp->desc.flags & 0x80) == 0) {

2
drivers/s390/cio/chp.h
View File

@ -44,6 +44,7 @@ struct channel_path {
struct mutex lock; /* Serialize access to below members. */
int state;
struct channel_path_desc desc;
struct channel_path_desc_fmt1 desc_fmt1;
/* Channel-measurement related stuff: */
int cmg;
int shared;
@ -62,6 +63,7 @@ int chp_is_registered(struct chp_id chpid);
void *chp_get_chp_desc(struct chp_id chpid);
void chp_remove_cmg_attr(struct channel_path *chp);
int chp_add_cmg_attr(struct channel_path *chp);
int chp_update_desc(struct channel_path *chp);
int chp_new(struct chp_id chpid);
void chp_cfg_schedule(struct chp_id chpid, int configure);
void chp_cfg_cancel_deconfigure(struct chp_id chpid);

11
drivers/s390/cio/chsc.c
View File

@ -376,7 +376,7 @@ static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
continue;
}
mutex_lock(&chp->lock);
chsc_determine_base_channel_path_desc(chpid, &chp->desc);
chp_update_desc(chp);
mutex_unlock(&chp->lock);
}
}
@ -631,8 +631,8 @@ int chsc_chp_vary(struct chp_id chpid, int on)
* Redo PathVerification on the devices the chpid connects to
*/
if (on) {
/* Try to update the channel path descritor. */
chsc_determine_base_channel_path_desc(chpid, &chp->desc);
/* Try to update the channel path description. */
chp_update_desc(chp);
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
__s390_vary_chpid_on, &chpid);
} else
@ -825,9 +825,10 @@ int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
{
struct chsc_response_struct *chsc_resp;
struct chsc_scpd *scpd_area;
unsigned long flags;
int ret;
spin_lock_irq(&chsc_page_lock);
spin_lock_irqsave(&chsc_page_lock, flags);
scpd_area = chsc_page;
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
if (ret)
@ -835,7 +836,7 @@ int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
chsc_resp = (void *)&scpd_area->response;
memcpy(desc, &chsc_resp->data, sizeof(*desc));
out:
spin_unlock_irq(&chsc_page_lock);
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}

5
drivers/s390/cio/css.c
View File

@ -1065,9 +1065,8 @@ void channel_subsystem_reinit(void)
chsc_enable_facility(CHSC_SDA_OC_MSS);
chp_id_for_each(&chpid) {
chp = chpid_to_chp(chpid);
if (!chp)
continue;
chsc_determine_base_channel_path_desc(chpid, &chp->desc);
if (chp)
chp_update_desc(chp);
}
}