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Differential D29005 Diff 85337 sys/kern/subr_autoconf.c

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sys/kern/subr_autoconf.c

Show First 20 Lines • Show All 132 Lines • ▼ Show 20 Lines if (running != 0) {
mtx_unlock(&intr_config_hook_lock); mtx_unlock(&intr_config_hook_lock);
return; return;
} }
running = 1; running = 1;
while (next_to_notify != NULL) { while (next_to_notify != NULL) {
hook_entry = next_to_notify; hook_entry = next_to_notify;
next_to_notify = STAILQ_NEXT(hook_entry, ich_links); next_to_notify = STAILQ_NEXT(hook_entry, ich_links);
hook_entry->ich_state = ICHS_RUNNING;
mtx_unlock(&intr_config_hook_lock); mtx_unlock(&intr_config_hook_lock);
(*hook_entry->ich_func)(hook_entry->ich_arg); (*hook_entry->ich_func)(hook_entry->ich_arg);
mtx_lock(&intr_config_hook_lock); mtx_lock(&intr_config_hook_lock);
} }
running = 0; running = 0;
mtx_unlock(&intr_config_hook_lock); mtx_unlock(&intr_config_hook_lock);
} }
▲ Show 20 Lines • Show All 45 Lines • ▼ Show 20 Lines if (hook_entry != NULL) {
mtx_unlock(&intr_config_hook_lock); mtx_unlock(&intr_config_hook_lock);
printf("config_intrhook_establish: establishing an " printf("config_intrhook_establish: establishing an "
"already established hook.\n"); "already established hook.\n");
return (1); return (1);
} }
STAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links); STAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
if (next_to_notify == NULL) if (next_to_notify == NULL)
next_to_notify = hook; next_to_notify = hook;
hook_entry->ich_state = ICHS_QUEUED;
mtx_unlock(&intr_config_hook_lock); mtx_unlock(&intr_config_hook_lock);
if (cold == 0) if (cold == 0)
/* /*
* XXX Call from a task since not all drivers expect * XXX Call from a task since not all drivers expect
* to be re-entered at the time a hook is established. * to be re-entered at the time a hook is established.
*/ */
/* XXX Sufficient for modules loaded after initial config??? */ /* XXX Sufficient for modules loaded after initial config??? */
run_interrupt_driven_config_hooks(); run_interrupt_driven_config_hooks();
Show All 11 Linesconfig_intrhook_oneshot(ich_func_t func, void *arg)
ohook = malloc(sizeof(*ohook), M_DEVBUF, M_WAITOK); ohook = malloc(sizeof(*ohook), M_DEVBUF, M_WAITOK);
ohook->och_func = func; ohook->och_func = func;
ohook->och_arg = arg; ohook->och_arg = arg;
ohook->och_hook.ich_func = config_intrhook_oneshot_func; ohook->och_hook.ich_func = config_intrhook_oneshot_func;
ohook->och_hook.ich_arg = ohook; ohook->och_hook.ich_arg = ohook;
config_intrhook_establish(&ohook->och_hook); config_intrhook_establish(&ohook->och_hook);
} }
void static void
config_intrhook_disestablish(struct intr_config_hook *hook) config_intrhook_disestablish_locked(struct intr_config_hook *hook)
{ {
struct intr_config_hook *hook_entry; struct intr_config_hook *hook_entry;
mtx_lock(&intr_config_hook_lock);
STAILQ_FOREACH(hook_entry, &intr_config_hook_list, ich_links) STAILQ_FOREACH(hook_entry, &intr_config_hook_list, ich_links)
if (hook_entry == hook) if (hook_entry == hook)
break; break;
if (hook_entry == NULL) if (hook_entry == NULL)
panic("config_intrhook_disestablish: disestablishing an " panic("config_intrhook_disestablish: disestablishing an "
"unestablished hook"); "unestablished hook");
if (next_to_notify == hook) if (next_to_notify == hook)
next_to_notify = STAILQ_NEXT(hook, ich_links); next_to_notify = STAILQ_NEXT(hook, ich_links);
STAILQ_REMOVE(&intr_config_hook_list, hook, intr_config_hook, ich_links); STAILQ_REMOVE(&intr_config_hook_list, hook, intr_config_hook, ich_links);
TSRELEASE("config hooks"); TSRELEASE("config hooks");
/* Wakeup anyone watching the list */ /* Wakeup anyone watching the list */
hook->ich_state = ICHS_DONE;
wakeup(&intr_config_hook_list); wakeup(&intr_config_hook_list);
}
void
config_intrhook_disestablish(struct intr_config_hook *hook)
{
mtx_lock(&intr_config_hook_lock);
config_intrhook_disestablish_locked(hook);
mtx_unlock(&intr_config_hook_lock); mtx_unlock(&intr_config_hook_lock);
}
int
config_intrhook_drain(struct intr_config_hook *hook)
{
mtx_lock(&intr_config_hook_lock);
/*
* The config hook has completed, so just return.
*/
if (hook->ich_state == ICHS_DONE) {
mtx_unlock(&intr_config_hook_lock);
return (ICHS_DONE);
}
/*
* The config hook hasn't started running, just call disestablish.
jhbUnsubmitted
Done
Inline Actions
}
/*
- * The config hook is hasn't started running, just call disestablish.
+ * The config hook hasn't started running, just call disestablish.
*/
if (hook->ich_state == ICHS_QUEUED) {
jhb:
*/
if (hook->ich_state == ICHS_QUEUED) {
config_intrhook_disestablish_locked(hook);
mtx_unlock(&intr_config_hook_lock);
return (ICHS_QUEUED);
}
/*
* The config hook is running, so wait for it to complete and return.
*/
while (hook->ich_state != ICHS_DONE) {
if (msleep(&intr_config_hook_list, &intr_config_hook_lock,
0, "confhd", hz) == EWOULDBLOCK) {
// XXX do I whine?
}
}
mtx_unlock(&intr_config_hook_lock);
return (ICHS_RUNNING);
} }
#ifdef DDB #ifdef DDB
#include <ddb/ddb.h> #include <ddb/ddb.h>
DB_SHOW_COMMAND(conifhk, db_show_conifhk) DB_SHOW_COMMAND(conifhk, db_show_conifhk)
{ {
struct intr_config_hook *hook_entry; struct intr_config_hook *hook_entry;
Show All 17 Lines