/**
@brief work function for memory dump
Invokes save_mem_dump() to performs file operation for saving a dump of a memory
interface.
@param ws the pointer to a work_struct instance
*/
void mem_dump_work(struct work_struct *ws)
{
#ifdef DEBUG_MODEM_IF
struct mem_link_device *mld;
mld = container_of(ws, struct mem_link_device, dump_work);
if (!mld) {
mif_err("ERR! no mld\n");
return;
}
save_mem_dump(mld);
#endif
}
/**
@brief trigger an enforced CP crash
@param mld the pointer to a mem_link_device instance
*/
void mem_forced_cp_crash(struct mem_link_device *mld)
{
struct link_device *ld = &mld->link_dev;
struct modem_ctl *mc = ld->mc;
unsigned long flags;
bool duplicated = false;
#ifdef DEBUG_MODEM_IF
struct utc_time t;
#endif
#ifdef DEBUG_MODEM_IF
get_utc_time(&t);
#endif
/* Disable normal IPC */
set_magic(mld, MEM_CRASH_MAGIC);
set_access(mld, 0);
spin_lock_irqsave(&mld->lock, flags);
if (mld->forced_cp_crash)
duplicated = true;
else
mld->forced_cp_crash = true;
spin_unlock_irqrestore(&mld->lock, flags);
if (duplicated) {
#ifdef DEBUG_MODEM_IF
evt_log(HMSU_FMT " %s: %s: ALREADY in progress <%pf>\n",
t.hour, t.min, t.sec, t.us, CALLEE, ld->name, CALLER);
#endif
return;
}
if (!cp_online(mc)) {
#ifdef DEBUG_MODEM_IF
evt_log(HMSU_FMT " %s: %s: %s.state %s != ONLINE <%pf>\n",
t.hour, t.min, t.sec, t.us,
CALLEE, ld->name, mc->name, mc_state(mc), CALLER);
#endif
return;
}
if (!wake_lock_active(&mld->dump_wlock))
wake_lock(&mld->dump_wlock);
stop_net_ifaces(ld);
/**
* If there is no CRASH_ACK from a CP in FORCE_CRASH_ACK_TIMEOUT,
* handle_no_cp_crash_ack() will be executed.
*/
mif_add_timer(&mld->crash_ack_timer, FORCE_CRASH_ACK_TIMEOUT,
handle_no_cp_crash_ack, (unsigned long)mld);
/* Send CRASH_EXIT command to a CP */
send_ipc_irq(mld, cmd2int(CMD_CRASH_EXIT));
#ifdef DEBUG_MODEM_IF
evt_log(HMSU_FMT " CRASH_EXIT: %s->%s: CP_CRASH_REQ <by %pf>\n",
t.hour, t.min, t.sec, t.us, ld->name, mc->name, CALLER);
if (in_interrupt())
queue_work(system_nrt_wq, &mld->dump_work);
else
save_mem_dump(mld);
#endif
}
void mem_forced_cp_crash(struct mem_link_device *mld)
{
struct link_device *ld = &mld->link_dev;
struct modem_ctl *mc = ld->mc;
bool duplicated = false;
unsigned long flags;
/* Disable normal IPC */
set_magic(mld, MEM_CRASH_MAGIC);
set_access(mld, 0);
spin_lock_irqsave(&mld->lock, flags);
if (atomic_read(&mc->forced_cp_crash))
duplicated = true;
else
atomic_set(&mc->forced_cp_crash, 1);
spin_unlock_irqrestore(&mld->lock, flags);
if (duplicated) {
evt_log(0, "%s: %s: ALREADY in progress <%pf>\n",
FUNC, ld->name, CALLER);
return;
}
if (!cp_online(mc)) {
evt_log(0, "%s: %s: %s.state %s != ONLINE <%pf>\n",
FUNC, ld->name, mc->name, mc_state(mc), CALLER);
return;
}
if (mc->wake_lock) {
if (!wake_lock_active(mc->wake_lock)) {
wake_lock(mc->wake_lock);
mif_err("%s->wake_lock locked\n", mc->name);
}
}
if (mld->attrs & LINK_ATTR(LINK_ATTR_MEM_DUMP)) {
stop_net_ifaces(ld);
if (mld->debug_info)
mld->debug_info();
/**
* If there is no CRASH_ACK from CP in a timeout,
* handle_no_cp_crash_ack() will be executed.
*/
mif_add_timer(&mc->crash_ack_timer, FORCE_CRASH_ACK_TIMEOUT,
handle_no_cp_crash_ack, (unsigned long)mld);
/* Send CRASH_EXIT command to a CP */
send_ipc_irq(mld, cmd2int(CMD_CRASH_EXIT));
} else {
modemctl_notify_event(MDM_EVENT_CP_FORCE_CRASH);
}
evt_log(0, "%s->%s: CP_CRASH_REQ <%pf>\n", ld->name, mc->name, CALLER);
#ifdef DEBUG_MODEM_IF
if (in_interrupt())
queue_work(system_nrt_wq, &mld->dump_work);
else
save_mem_dump(mld);
#endif
}