drivers/net/wireless/intel/iwlwifi/dvm/sta.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/intel/iwlwifi/dvm/sta.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/intel/iwlwifi/dvm/sta.c
Extension
.c
Size
38286 bytes
Lines
1426
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source 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

ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
		IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
				"adding again.\n", sta_id, addr);
		return sta_id;
	}

	station = &priv->stations[sta_id];
	station->used = IWL_STA_DRIVER_ACTIVE;
	IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
			sta_id, addr);
	priv->num_stations++;

	/* Set up the REPLY_ADD_STA command to send to device */
	memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
	memcpy(station->sta.sta.addr, addr, ETH_ALEN);
	station->sta.mode = 0;
	station->sta.sta.sta_id = sta_id;
	station->sta.station_flags = ctx->station_flags;
	station->ctxid = ctx->ctxid;

	if (sta) {
		struct iwl_station_priv *sta_priv;

		sta_priv = (void *)sta->drv_priv;
		sta_priv->ctx = ctx;
	}

	/*
	 * OK to call unconditionally, since local stations (IBSS BSSID
	 * STA and broadcast STA) pass in a NULL sta, and mac80211
	 * doesn't allow HT IBSS.
	 */
	iwl_set_ht_add_station(priv, sta_id, sta, ctx);

	return sta_id;

}

#define STA_WAIT_TIMEOUT (HZ/2)

/*
 * iwl_add_station_common -
 */
int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
			   const u8 *addr, bool is_ap,
			   struct ieee80211_sta *sta, u8 *sta_id_r)
{
	int ret = 0;
	u8 sta_id;
	struct iwl_addsta_cmd sta_cmd;

	*sta_id_r = 0;
	spin_lock_bh(&priv->sta_lock);
	sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
	if (sta_id == IWL_INVALID_STATION) {
		IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
			addr);
		spin_unlock_bh(&priv->sta_lock);
		return -EINVAL;
	}

	/*
	 * uCode is not able to deal with multiple requests to add a
	 * station. Keep track if one is in progress so that we do not send
	 * another.
	 */
	if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
		IWL_DEBUG_INFO(priv, "STA %d already in process of being "
			       "added.\n", sta_id);
		spin_unlock_bh(&priv->sta_lock);
		return -EEXIST;
	}

	if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
	    (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
		IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
				"adding again.\n", sta_id, addr);
		spin_unlock_bh(&priv->sta_lock);
		return -EEXIST;
	}

	priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
	memcpy(&sta_cmd, &priv->stations[sta_id].sta,
	       sizeof(struct iwl_addsta_cmd));
	spin_unlock_bh(&priv->sta_lock);

	/* Add station to device's station table */
	ret = iwl_send_add_sta(priv, &sta_cmd, 0);
	if (ret) {
		spin_lock_bh(&priv->sta_lock);

Annotation

Implementation Notes