wl12xx: add system_hlid

system_hlid is a const hlid (always 0), used by the fw and driver
for packets which are not bound to specific role (e.g. dynamic
memory packets).
indicate it as always allocated.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/main.c

@@ -1491,7 +1491,7 @@ static void wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 	q = wl1271_tx_get_queue(mapping);
 
 	if (wl->bss_type == BSS_TYPE_AP_BSS)
-		hlid = wl1271_tx_get_hlid(skb);
+		hlid = wl12xx_tx_get_hlid_ap(wl, skb);
 
 	spin_lock_irqsave(&wl->wl_lock, flags);
 
@@ -2069,6 +2069,9 @@ deinit:
 	memset(wl->roles_map, 0, sizeof(wl->roles_map));
 	memset(wl->links_map, 0, sizeof(wl->links_map));
 
+	/* The system link is always allocated */
+	__set_bit(WL12XX_SYSTEM_HLID, wl->links_map);
+
 	/*
 	 * this is performed after the cancel_work calls and the associated
 	 * mutex_lock, so that wl1271_op_add_interface does not accidentally
@@ -4407,6 +4410,7 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 	wl->tx_security_seq = 0;
 	wl->tx_security_last_seq_lsb = 0;
 	wl->role_id = WL12XX_INVALID_ROLE_ID;
+	wl->system_hlid = WL12XX_SYSTEM_HLID;
 	wl->sta_hlid = WL12XX_INVALID_LINK_ID;
 	wl->dev_role_id = WL12XX_INVALID_ROLE_ID;
 	wl->dev_hlid = WL12XX_INVALID_LINK_ID;
@@ -4415,6 +4419,9 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 	wl->fwlog_size = 0;
 	init_waitqueue_head(&wl->fwlog_waitq);
 
+	/* The system link is always allocated */
+	__set_bit(WL12XX_SYSTEM_HLID, wl->links_map);
+
 	memset(wl->tx_frames_map, 0, sizeof(wl->tx_frames_map));
 	for (i = 0; i < ACX_TX_DESCRIPTORS; i++)
 		wl->tx_frames[i] = NULL;

drivers/net/wireless/wl12xx/tx.c

@@ -132,7 +132,12 @@ static void wl1271_tx_regulate_link(struct wl1271 *wl, u8 hlid)
 }
 #endif
 
-u8 wl1271_tx_get_hlid(struct sk_buff *skb)
+static bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
+{
+	return wl->dummy_packet == skb;
+}
+
+u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct sk_buff *skb)
 {
 	struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb);
 
@@ -145,6 +150,9 @@ u8 wl1271_tx_get_hlid(struct sk_buff *skb)
 	} else {
 		struct ieee80211_hdr *hdr;
 
+		if (!test_bit(WL1271_FLAG_AP_STARTED, &wl->flags))
+			return wl->system_hlid;
+
 		hdr = (struct ieee80211_hdr *)skb->data;
 		if (ieee80211_is_mgmt(hdr->frame_control))
 			return WL1271_AP_GLOBAL_HLID;
@@ -153,6 +161,20 @@ u8 wl1271_tx_get_hlid(struct sk_buff *skb)
 	}
 }
 
+static u8 wl1271_tx_get_hlid(struct wl1271 *wl, struct sk_buff *skb)
+{
+	if (wl12xx_is_dummy_packet(wl, skb))
+		return wl->system_hlid;
+
+	if (wl->bss_type == BSS_TYPE_AP_BSS)
+		return wl12xx_tx_get_hlid_ap(wl, skb);
+
+	if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
+		return wl->sta_hlid;
+	else
+		return wl->dev_hlid;
+}
+
 static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl,
 						unsigned int packet_length)
 {
@@ -221,11 +243,6 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
 	return ret;
 }
 
-static bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
-{
-	return wl->dummy_packet == skb;
-}
-
 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
 			      u32 extra, struct ieee80211_tx_info *control,
 			      u8 hlid)
@@ -371,14 +388,7 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
 		}
 	}
 
-	if (wl->bss_type == BSS_TYPE_AP_BSS)
-		hlid = wl1271_tx_get_hlid(skb);
-	else
-		if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
-			hlid = wl->sta_hlid;
-		else
-			hlid = wl->dev_hlid;
-
+	hlid = wl1271_tx_get_hlid(wl, skb);
 	if (hlid == WL12XX_INVALID_LINK_ID) {
 		wl1271_error("invalid hlid. dropping skb 0x%p", skb);
 		return -EINVAL;
@@ -564,7 +574,7 @@ static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb)
 	if (wl12xx_is_dummy_packet(wl, skb)) {
 		set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
 	} else if (wl->bss_type == BSS_TYPE_AP_BSS) {
-		u8 hlid = wl1271_tx_get_hlid(skb);
+		u8 hlid = wl1271_tx_get_hlid(wl, skb);
 		skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
 
 		/* make sure we dequeue the same packet next time */

drivers/net/wireless/wl12xx/tx.h

@@ -210,7 +210,7 @@ void wl1271_tx_flush(struct wl1271 *wl);
 u8 wl1271_rate_to_idx(int rate, enum ieee80211_band band);
 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set);
 u32 wl1271_tx_min_rate_get(struct wl1271 *wl);
-u8 wl1271_tx_get_hlid(struct sk_buff *skb);
+u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct sk_buff *skb);
 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid);
 void wl1271_handle_tx_low_watermark(struct wl1271 *wl);
 

drivers/net/wireless/wl12xx/wl12xx.h

@@ -141,6 +141,7 @@ extern u32 wl12xx_debug_level;
 #define WL12XX_MAX_LINKS           8
 #define WL12XX_INVALID_ROLE_ID     0xff
 #define WL12XX_INVALID_LINK_ID     0xff
+#define WL12XX_SYSTEM_HLID         0
 #define WL1271_AP_GLOBAL_HLID      0
 #define WL1271_AP_BROADCAST_HLID   1
 #define WL1271_AP_STA_HLID_START   2
@@ -395,6 +396,7 @@ struct wl1271 {
 	int channel;
 	u8 role_id;
 	u8 dev_role_id;
+	u8 system_hlid;
 	u8 sta_hlid;
 	u8 dev_hlid;