static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
{
/* which kind of information was stored? */
switch (sei_area->cc) {
case 1: /* link incident*/
chsc_process_sei_link_incident(sei_area);
break;
case 2: /* i/o resource accessibility */
chsc_process_sei_res_acc(sei_area);
break;
case 7: /* channel-path-availability information */
chsc_process_sei_chp_avail(sei_area);
break;
case 8: /* channel-path-configuration notification */
chsc_process_sei_chp_config(sei_area);
break;
case 12: /* scm change notification */
chsc_process_sei_scm_change(sei_area);
break;
case 14: /* scm available notification */
chsc_process_sei_scm_avail(sei_area);
break;
default: /* other stuff */
CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
sei_area->cc);
break;
}
/* Check if we might have lost some information. */
if (sei_area->flags & 0x40) {
CIO_CRW_EVENT(2, "chsc: event overflow\n");
css_schedule_eval_all();
}
}
/*
* Called from the machine check handler for subchannel report words.
*/
static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct subchannel_id mchk_schid;
struct subchannel *sch;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW0 reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
if (crw1)
CIO_CRW_EVENT(2, "CRW1 reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw1->slct, crw1->oflw, crw1->chn, crw1->rsc,
crw1->anc, crw1->erc, crw1->rsid);
init_subchannel_id(&mchk_schid);
mchk_schid.sch_no = crw0->rsid;
if (crw1)
mchk_schid.ssid = (crw1->rsid >> 4) & 3;
if (crw0->erc == CRW_ERC_PMOD) {
sch = get_subchannel_by_schid(mchk_schid);
if (sch) {
css_update_ssd_info(sch);
put_device(&sch->dev);
}
}
/*
/*
* Handle channel subsystem related CRWs.
* Use store event information to find out what's going on.
*
* Note: Access to sei_page is serialized through machine check handler
* thread, so no need for locking.
*/
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct chsc_sei *sei = sei_page;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
CIO_TRACE_EVENT(2, "prcss");
chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
}
/**
* chp_process_crw - process channel-path status change
* @crw0: channel report-word to handler
* @crw1: second channel-report word (always NULL)
* @overflow: crw overflow indication
*
* Handle channel-report-words indicating that the status of a channel-path
* has changed.
*/
static void chp_process_crw(struct crw *crw0, struct crw *crw1,
int overflow)
{
struct chp_id chpid;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
/*
* Check for solicited machine checks. These are
* created by reset channel path and need not be
* handled here.
*/
if (crw0->slct) {
CIO_CRW_EVENT(2, "solicited machine check for "
"channel path %02X\n", crw0->rsid);
return;
}
chp_id_init(&chpid);
chpid.id = crw0->rsid;
switch (crw0->erc) {
case CRW_ERC_IPARM: /* Path has come. */
if (!chp_is_registered(chpid))
chp_new(chpid);
chsc_chp_online(chpid);
break;
case CRW_ERC_PERRI: /* Path has gone. */
case CRW_ERC_PERRN:
chsc_chp_offline(chpid);
break;
default:
CIO_CRW_EVENT(2, "Don't know how to handle erc=%x\n",
crw0->erc);
}
}
void css_schedule_eval_all_unreg(unsigned long delay)
{
unsigned long flags;
struct idset *unreg_set;
/* Find unregistered subchannels. */
unreg_set = idset_sch_new();
if (!unreg_set) {
/* Fallback. */
css_schedule_eval_all();
return;
}
idset_fill(unreg_set);
bus_for_each_dev(&css_bus_type, NULL, unreg_set, __unset_registered);
/* Apply to slow_subchannel_set. */
spin_lock_irqsave(&slow_subchannel_lock, flags);
idset_add_set(slow_subchannel_set, unreg_set);
atomic_set(&css_eval_scheduled, 1);
queue_delayed_work(cio_work_q, &slow_path_work, delay);
spin_unlock_irqrestore(&slow_subchannel_lock, flags);
idset_free(unreg_set);
}
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct chsc_sei_area *sei_area;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
if (!sei_page)
return;
/* Access to sei_page is serialized through machine check handler
* thread, so no need for locking. */
sei_area = sei_page;
CIO_TRACE_EVENT(2, "prcss");
do {
memset(sei_area, 0, sizeof(*sei_area));
sei_area->request.length = 0x0010;
sei_area->request.code = 0x000e;
if (chsc(sei_area))
break;
if (sei_area->response.code == 0x0001) {
CIO_CRW_EVENT(4, "chsc: sei successful\n");
chsc_process_sei(sei_area);
} else {
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
sei_area->response.code);
break;
}
} while (sei_area->flags & 0x80);
}