/**
* chsc_chp_vary - propagate channel-path vary operation to subchannels
* @chpid: channl-path ID
* @on: non-zero for vary online, zero for vary offline
*/
int chsc_chp_vary(struct chp_id chpid, int on)
{
struct channel_path *chp = chpid_to_chp(chpid);
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
/*
* 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);
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
__s390_vary_chpid_on, &chpid);
} else
for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
NULL, &chpid);
return 0;
}
/**
* chsc_chp_vary - propagate channel-path vary operation to subchannels
* @chpid: channl-path ID
* @on: non-zero for vary online, zero for vary offline
*/
int chsc_chp_vary(struct chp_id chpid, int on)
{
struct channel_path *chp = chpid_to_chp(chpid);
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
/*
* Redo PathVerification on the devices the chpid connects to
*/
if (on) {
/* Try to update the channel path description. */
chp_update_desc(chp);
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
NULL, &chpid);
css_schedule_reprobe();
} else
for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
NULL, &chpid);
return 0;
}
/**
* chsc_chp_vary - propagate channel-path vary operation to subchannels
* @chpid: channl-path ID
* @on: non-zero for vary online, zero for vary offline
*/
int chsc_chp_vary(struct chp_id chpid, int on)
{
struct chp_link link;
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
/*
* Redo PathVerification on the devices the chpid connects to
*/
if (on)
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
__s390_vary_chpid_on, &link);
else
for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
NULL, &link);
return 0;
}
static void css_slow_path_func(struct work_struct *unused)
{
unsigned long flags;
CIO_TRACE_EVENT(4, "slowpath");
for_each_subchannel_staged(slow_eval_known_fn, slow_eval_unknown_fn,
NULL);
spin_lock_irqsave(&slow_subchannel_lock, flags);
if (idset_is_empty(slow_subchannel_set)) {
atomic_set(&css_eval_scheduled, 0);
wake_up(&css_eval_wq);
}
spin_unlock_irqrestore(&slow_subchannel_lock, flags);
}
void chsc_chp_offline(struct chp_id chpid)
{
char dbf_txt[15];
struct chp_link link;
sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
CIO_TRACE_EVENT(2, dbf_txt);
if (chp_get_status(chpid) <= 0)
return;
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
}
void chsc_chp_online(struct chp_id chpid)
{
char dbf_txt[15];
struct chp_link link;
sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
CIO_TRACE_EVENT(2, dbf_txt);
if (chp_get_status(chpid) != 0) {
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
for_each_subchannel_staged(__s390_process_res_acc, NULL,
&link);
}
}
static void s390_process_res_acc(struct chp_link *link)
{
char dbf_txt[15];
sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
link->chpid.id);
CIO_TRACE_EVENT( 2, dbf_txt);
if (link->fla != 0) {
sprintf(dbf_txt, "fla%x", link->fla);
CIO_TRACE_EVENT( 2, dbf_txt);
}
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
/*
* I/O resources may have become accessible.
* Scan through all subchannels that may be concerned and
* do a validation on those.
* The more information we have (info), the less scanning
* will we have to do.
*/
for_each_subchannel_staged(__s390_process_res_acc,
s390_process_res_acc_new_sch, link);
}
