drivers/net/wireless/intel/iwlwifi/fw/notif-wait.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/intel/iwlwifi/fw/notif-wait.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/intel/iwlwifi/fw/notif-wait.c
Extension
.c
Size
3593 bytes
Lines
136
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

list_for_each_entry(w, &notif_wait->notif_waits, list) {
			int i;
			bool found = false;

			/*
			 * If it already finished (triggered) or has been
			 * aborted then don't evaluate it again to avoid races,
			 * Otherwise the function could be called again even
			 * though it returned true before
			 */
			if (w->triggered || w->aborted)
				continue;

			for (i = 0; i < w->n_cmds; i++) {
				u16 rec_id = WIDE_ID(pkt->hdr.group_id,
						     pkt->hdr.cmd);

				if (w->cmds[i] == rec_id ||
				    (!iwl_cmd_groupid(w->cmds[i]) &&
				     DEF_ID(w->cmds[i]) == rec_id)) {
					found = true;
					break;
				}
			}
			if (!found)
				continue;

			if (!w->fn || w->fn(notif_wait, pkt, w->fn_data)) {
				w->triggered = true;
				triggered = true;
			}
		}
		spin_unlock_bh(&notif_wait->notif_wait_lock);
	}

	return triggered;
}
IWL_EXPORT_SYMBOL(iwl_notification_wait);

void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_wait)
{
	struct iwl_notification_wait *wait_entry;

	spin_lock_bh(&notif_wait->notif_wait_lock);
	list_for_each_entry(wait_entry, &notif_wait->notif_waits, list)
		wait_entry->aborted = true;
	spin_unlock_bh(&notif_wait->notif_wait_lock);

	wake_up_all(&notif_wait->notif_waitq);
}
IWL_EXPORT_SYMBOL(iwl_abort_notification_waits);

void
iwl_init_notification_wait(struct iwl_notif_wait_data *notif_wait,
			   struct iwl_notification_wait *wait_entry,
			   const u16 *cmds, int n_cmds,
			   bool (*fn)(struct iwl_notif_wait_data *notif_wait,
				      struct iwl_rx_packet *pkt, void *data),
			   void *fn_data)
{
	if (WARN_ON(n_cmds > MAX_NOTIF_CMDS))
		n_cmds = MAX_NOTIF_CMDS;

	wait_entry->fn = fn;
	wait_entry->fn_data = fn_data;
	wait_entry->n_cmds = n_cmds;
	memcpy(wait_entry->cmds, cmds, n_cmds * sizeof(u16));
	wait_entry->triggered = false;
	wait_entry->aborted = false;

	spin_lock_bh(&notif_wait->notif_wait_lock);
	list_add(&wait_entry->list, &notif_wait->notif_waits);
	spin_unlock_bh(&notif_wait->notif_wait_lock);
}
IWL_EXPORT_SYMBOL(iwl_init_notification_wait);

void iwl_remove_notification(struct iwl_notif_wait_data *notif_wait,
			     struct iwl_notification_wait *wait_entry)
{
	spin_lock_bh(&notif_wait->notif_wait_lock);
	list_del(&wait_entry->list);
	spin_unlock_bh(&notif_wait->notif_wait_lock);
}
IWL_EXPORT_SYMBOL(iwl_remove_notification);

int iwl_wait_notification(struct iwl_notif_wait_data *notif_wait,
			  struct iwl_notification_wait *wait_entry,
			  unsigned long timeout)
{
	int ret;

Annotation

Implementation Notes