wil6210: support up to 20 stations in AP mode

New FW added support for upto 20 clients in AP mode. Change the driver
to support this as well. FW reports it's max supported associations in
WMI_READY_EVENT. Some WMI commands/events use cidxtid field which is
limited to 16 cids. Use new cid/tid fields instead.

For Rx packets cid from rx descriptor is limited to 3 bits (0..7),
to find the real cid, compare transmitter address with the stored
stations mac address in the driver sta array.

EDMA FW still supports 8 stations. Extending the support to 20
stations will come later.
Signed-off-by: Ahmad Masri <amasri@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/wil6210/cfg80211.c

 /*
  * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -395,7 +395,7 @@ static int wil_find_cid_by_idx(struct wil6210_priv *wil, u8 mid, int idx)
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		if (wil->sta[i].status == wil_sta_unused)
 			continue;
 		if (wil->sta[i].mid != mid)
@@ -3007,7 +3007,7 @@ static int wil_rf_sector_set_selected(struct wiphy *wiphy,
 			wil, vif->mid, WMI_INVALID_RF_SECTOR_INDEX,
 			sector_type, WIL_CID_ALL);
 		if (rc == -EINVAL) {
-			for (i = 0; i < WIL6210_MAX_CID; i++) {
+			for (i = 0; i < max_assoc_sta; i++) {
 				if (wil->sta[i].mid != vif->mid)
 					continue;
 				rc = wil_rf_sector_wmi_set_selected(

drivers/net/wireless/ath/wil6210/debugfs.c

@@ -162,7 +162,7 @@ static int ring_show(struct seq_file *s, void *data)
 
 			snprintf(name, sizeof(name), "tx_%2d", i);
 
-			if (cid < WIL6210_MAX_CID)
+			if (cid < max_assoc_sta)
 				seq_printf(s,
 					   "\n%pM CID %d TID %d 1x%s BACK([%u] %u TU A%s) [%3d|%3d] idle %s\n",
 					   wil->sta[cid].addr, cid, tid,
@@ -792,14 +792,14 @@ static ssize_t wil_write_back(struct file *file, const char __user *buf,
 				"BACK: del_rx require at least 2 params\n");
 			return -EINVAL;
 		}
-		if (p1 < 0 || p1 >= WIL6210_MAX_CID) {
+		if (p1 < 0 || p1 >= max_assoc_sta) {
 			wil_err(wil, "BACK: invalid CID %d\n", p1);
 			return -EINVAL;
 		}
 		if (rc < 4)
 			p3 = WLAN_REASON_QSTA_LEAVE_QBSS;
 		sta = &wil->sta[p1];
-		wmi_delba_rx(wil, sta->mid, mk_cidxtid(p1, p2), p3);
+		wmi_delba_rx(wil, sta->mid, p1, p2, p3);
 	} else {
 		wil_err(wil, "BACK: Unrecognized command \"%s\"\n", cmd);
 		return -EINVAL;
@@ -1243,7 +1243,7 @@ static int bf_show(struct seq_file *s, void *data)
 
 	memset(&reply, 0, sizeof(reply));
 
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		u32 status;
 
 		cmd.cid = i;
@@ -1340,7 +1340,7 @@ static int link_show(struct seq_file *s, void *data)
 	if (!sinfo)
 		return -ENOMEM;
 
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		struct wil_sta_info *p = &wil->sta[i];
 		char *status = "unknown";
 		struct wil6210_vif *vif;
@@ -1542,7 +1542,7 @@ __acquires(&p->tid_rx_lock) __releases(&p->tid_rx_lock)
 	struct wil6210_priv *wil = s->private;
 	int i, tid, mcs;
 
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		struct wil_sta_info *p = &wil->sta[i];
 		char *status = "unknown";
 		u8 aid = 0;
@@ -1651,7 +1651,7 @@ __acquires(&p->tid_rx_lock) __releases(&p->tid_rx_lock)
 	struct wil6210_priv *wil = s->private;
 	int i, bin;
 
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		struct wil_sta_info *p = &wil->sta[i];
 		char *status = "unknown";
 		u8 aid = 0;
@@ -1740,7 +1740,7 @@ static ssize_t wil_tx_latency_write(struct file *file, const char __user *buf,
 		size_t sz = sizeof(u64) * WIL_NUM_LATENCY_BINS;
 
 		wil->tx_latency_res = val;
-		for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+		for (i = 0; i < max_assoc_sta; i++) {
 			struct wil_sta_info *sta = &wil->sta[i];
 
 			kfree(sta->tx_latency_bins);
@@ -1825,7 +1825,7 @@ static void wil_link_stats_debugfs_show_vif(struct wil6210_vif *vif,
 	}
 
 	seq_printf(s, "TSF %lld\n", vif->fw_stats_tsf);
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		if (wil->sta[i].status == wil_sta_unused)
 			continue;
 		if (wil->sta[i].mid != vif->mid)
@@ -2440,7 +2440,7 @@ void wil6210_debugfs_remove(struct wil6210_priv *wil)
 	wil->debug = NULL;
 
 	kfree(wil->dbg_data.data_arr);
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++)
+	for (i = 0; i < max_assoc_sta; i++)
 		kfree(wil->sta[i].tx_latency_bins);
 
 	/* free pmc memory without sending command to fw, as it will

drivers/net/wireless/ath/wil6210/main.c

 /*
  * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -219,7 +219,7 @@ static bool wil_vif_is_connected(struct wil6210_priv *wil, u8 mid)
 {
 	int i;
 
-	for (i = 0; i < WIL6210_MAX_CID; i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		if (wil->sta[i].mid == mid &&
 		    wil->sta[i].status == wil_sta_connected)
 			return true;
@@ -322,7 +322,7 @@ static void _wil6210_disconnect_complete(struct wil6210_vif *vif,
 			wil_disconnect_cid_complete(vif, cid, reason_code);
 	} else { /* all */
 		wil_dbg_misc(wil, "Disconnect complete all\n");
-		for (cid = 0; cid < WIL6210_MAX_CID; cid++)
+		for (cid = 0; cid < max_assoc_sta; cid++)
 			wil_disconnect_cid_complete(vif, cid, reason_code);
 	}
 
@@ -434,7 +434,7 @@ static void _wil6210_disconnect(struct wil6210_vif *vif, const u8 *bssid,
 			wil_disconnect_cid(vif, cid, reason_code);
 	} else { /* all */
 		wil_dbg_misc(wil, "Disconnect all\n");
-		for (cid = 0; cid < WIL6210_MAX_CID; cid++)
+		for (cid = 0; cid < max_assoc_sta; cid++)
 			wil_disconnect_cid(vif, cid, reason_code);
 	}
 
@@ -1895,7 +1895,7 @@ int wil_find_cid(struct wil6210_priv *wil, u8 mid, const u8 *mac)
 	int i;
 	int rc = -ENOENT;
 
-	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
+	for (i = 0; i < max_assoc_sta; i++) {
 		if (wil->sta[i].mid == mid &&
 		    wil->sta[i].status != wil_sta_unused &&
 		    ether_addr_equal(wil->sta[i].addr, mac)) {

drivers/net/wireless/ath/wil6210/rx_reorder.c

 /*
  * Copyright (c) 2014-2017 Qualcomm Atheros, Inc.
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -307,8 +307,8 @@ static u16 wil_agg_size(struct wil6210_priv *wil, u16 req_agg_wsize)
 }
 
 /* Block Ack - Rx side (recipient) */
-int wil_addba_rx_request(struct wil6210_priv *wil, u8 mid,
-			 u8 cidxtid, u8 dialog_token, __le16 ba_param_set,
+int wil_addba_rx_request(struct wil6210_priv *wil, u8 mid, u8 cid, u8 tid,
+			 u8 dialog_token, __le16 ba_param_set,
 			 __le16 ba_timeout, __le16 ba_seq_ctrl)
 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 {
@@ -316,7 +316,6 @@ __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 	u16 agg_timeout = le16_to_cpu(ba_timeout);
 	u16 seq_ctrl = le16_to_cpu(ba_seq_ctrl);
 	struct wil_sta_info *sta;
-	u8 cid, tid;
 	u16 agg_wsize = 0;
 	/* bit 0: A-MSDU supported
 	 * bit 1: policy (should be 0 for us)
@@ -335,10 +334,9 @@ __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 	int rc = 0;
 
 	might_sleep();
-	parse_cidxtid(cidxtid, &cid, &tid);
 
 	/* sanity checks */
-	if (cid >= WIL6210_MAX_CID) {
+	if (cid >= max_assoc_sta) {
 		wil_err(wil, "BACK: invalid CID %d\n", cid);
 		rc = -EINVAL;
 		goto out;

drivers/net/wireless/ath/wil6210/trace.h

 /*
  * Copyright (c) 2013-2016 Qualcomm Atheros, Inc.
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -181,7 +182,7 @@ TRACE_EVENT(wil6210_rx,
 		__entry->seq = wil_rxdesc_seq(d);
 		__entry->mcs = wil_rxdesc_mcs(d);
 	),
-	TP_printk("index %d len %d mid %d cid %d tid %d mcs %d seq 0x%03x"
+	TP_printk("index %d len %d mid %d cid (%%8) %d tid %d mcs %d seq 0x%03x"
 		  " type 0x%1x subtype 0x%1x", __entry->index, __entry->len,
 		  __entry->mid, __entry->cid, __entry->tid, __entry->mcs,
 		  __entry->seq, __entry->type, __entry->subtype)

drivers/net/wireless/ath/wil6210/txrx.c

@@ -372,6 +372,78 @@ static bool wil_is_rx_idle(struct wil6210_priv *wil)
 	return true;
 }
 
+static int wil_rx_get_cid_by_skb(struct wil6210_priv *wil, struct sk_buff *skb)
+{
+	struct vring_rx_desc *d = wil_skb_rxdesc(skb);
+	int mid = wil_rxdesc_mid(d);
+	struct wil6210_vif *vif = wil->vifs[mid];
+	/* cid from DMA descriptor is limited to 3 bits.
+	 * In case of cid>=8, the value would be cid modulo 8 and we need to
+	 * find real cid by locating the transmitter (ta) inside sta array
+	 */
+	int cid = wil_rxdesc_cid(d);
+	unsigned int snaplen = wil_rx_snaplen();
+	struct ethhdr *eth;
+	struct ieee80211_hdr_3addr *hdr;
+	int i;
+	unsigned char *ta;
+	u8 ftype;
+
+	/* in monitor mode there are no connections */
+	if (vif->wdev.iftype == NL80211_IFTYPE_MONITOR)
+		return cid;
+
+	ftype = wil_rxdesc_ftype(d) << 2;
+	if (likely(ftype == IEEE80211_FTYPE_DATA)) {
+		if (unlikely(skb->len < ETH_HLEN + snaplen)) {
+			wil_err_ratelimited(wil,
+					    "Short data frame, len = %d\n",
+					    skb->len);
+			return -ENOENT;
+		}
+		eth = (void *)skb->data;
+		ta = eth->h_source;
+	} else {
+		if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) {
+			wil_err_ratelimited(wil, "Short frame, len = %d\n",
+					    skb->len);
+			return -ENOENT;
+		}
+		hdr = (void *)skb->data;
+		ta = hdr->addr2;
+	}
+
+	if (max_assoc_sta <= WIL6210_RX_DESC_MAX_CID)
+		return cid;
+
+	/* assuming no concurrency between AP interfaces and STA interfaces.
+	 * multista is used only in P2P_GO or AP mode. In other modes return
+	 * cid from the rx descriptor
+	 */
+	if (vif->wdev.iftype != NL80211_IFTYPE_P2P_GO &&
+	    vif->wdev.iftype != NL80211_IFTYPE_AP)
+		return cid;
+
+	/* For Rx packets cid from rx descriptor is limited to 3 bits (0..7),
+	 * to find the real cid, compare transmitter address with the stored
+	 * stations mac address in the driver sta array
+	 */
+	for (i = cid; i < max_assoc_sta; i += WIL6210_RX_DESC_MAX_CID) {
+		if (wil->sta[i].status != wil_sta_unused &&
+		    ether_addr_equal(wil->sta[i].addr, ta)) {
+			cid = i;
+			break;
+		}
+	}
+	if (i >= max_assoc_sta) {
+		wil_err_ratelimited(wil, "Could not find cid for frame with transmit addr = %pM, iftype = %d, frametype = %d, len = %d\n",
+				    ta, vif->wdev.iftype, ftype, skb->len);
+		cid = -ENOENT;
+	}
+
+	return cid;
+}
+
 /**
  * reap 1 frame from @swhead
  *
@@ -397,7 +469,7 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	int i;
 	struct wil_net_stats *stats;
 
-	BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb));
+	BUILD_BUG_ON(sizeof(struct skb_rx_info) > sizeof(skb->cb));
 
 again:
 	if (unlikely(wil_ring_is_empty(vring)))
@@ -429,7 +501,6 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4,
 			  (const void *)d, sizeof(*d), false);
 
-	cid = wil_rxdesc_cid(d);
 	mid = wil_rxdesc_mid(d);
 	vif = wil->vifs[mid];
 
@@ -440,11 +511,9 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 		goto again;
 	}
 	ndev = vif_to_ndev(vif);
-	stats = &wil->sta[cid].stats;
-
 	if (unlikely(dmalen > sz)) {
-		wil_err(wil, "Rx size too large: %d bytes!\n", dmalen);
-		stats->rx_large_frame++;
+		wil_err_ratelimited(wil, "Rx size too large: %d bytes!\n",
+				    dmalen);
 		kfree_skb(skb);
 		goto again;
 	}
@@ -455,6 +524,14 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
 			  skb->data, skb_headlen(skb), false);
 
+	cid = wil_rx_get_cid_by_skb(wil, skb);
+	if (cid == -ENOENT) {
+		kfree_skb(skb);
+		goto again;
+	}
+	wil_skb_set_cid(skb, (u8)cid);
+	stats = &wil->sta[cid].stats;
+
 	stats->last_mcs_rx = wil_rxdesc_mcs(d);
 	if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs))
 		stats->rx_per_mcs[stats->last_mcs_rx]++;
@@ -501,13 +578,6 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 		goto again;
 	}
 
-	if (unlikely(skb->len < ETH_HLEN + snaplen)) {
-		wil_err(wil, "Short frame, len = %d\n", skb->len);
-		stats->rx_short_frame++;
-		kfree_skb(skb);
-		goto again;
-	}
-
 	/* L4 IDENT is on when HW calculated checksum, check status
 	 * and in case of error drop the packet
 	 * higher stack layers will handle retransmission (if required)
@@ -604,7 +674,7 @@ int reverse_memcmp(const void *cs, const void *ct, size_t count)
 static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb)
 {
 	struct vring_rx_desc *d = wil_skb_rxdesc(skb);
-	int cid = wil_rxdesc_cid(d);
+	int cid = wil_skb_get_cid(skb);
 	int tid = wil_rxdesc_tid(d);
 	int key_id = wil_rxdesc_key_id(d);
 	int mc = wil_rxdesc_mcast(d);
@@ -652,7 +722,7 @@ static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid,
 {
 	struct vring_rx_desc *d = wil_skb_rxdesc(skb);
 
-	*cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */
+	*cid = wil_skb_get_cid(skb);
 	*security = wil_rxdesc_security(d);
 }
 
@@ -916,7 +986,6 @@ static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
 				.ring_size = cpu_to_le16(size),
 			},
 			.ringid = id,
-			.cidxtid = mk_cidxtid(cid, tid),
 			.encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
 			.mac_ctrl = 0,
 			.to_resolution = 0,
@@ -936,6 +1005,14 @@ static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
 	struct wil_ring *vring = &wil->ring_tx[id];
 	struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id];
 
+	if (cid >= WIL6210_RX_DESC_MAX_CID) {
+		cmd.vring_cfg.cidxtid = CIDXTID_EXTENDED_CID_TID;
+		cmd.vring_cfg.cid = cid;
+		cmd.vring_cfg.tid = tid;
+	} else {
+		cmd.vring_cfg.cidxtid = mk_cidxtid(cid, tid);
+	}
+
 	wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n",
 		     cmd.vring_cfg.tx_sw_ring.max_mpdu_size);
 	lockdep_assert_held(&wil->mutex);
@@ -988,7 +1065,7 @@ static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size,
 	txdata->enabled = 0;
 	spin_unlock_bh(&txdata->lock);
 	wil_vring_free(wil, vring);
-	wil->ring2cid_tid[id][0] = WIL6210_MAX_CID;
+	wil->ring2cid_tid[id][0] = max_assoc_sta;
 	wil->ring2cid_tid[id][1] = 0;
 
  out:
@@ -1073,7 +1150,7 @@ static int wil_tx_vring_modify(struct wil6210_vif *vif, int ring_id, int cid,
 	txdata->dot1x_open = false;
 	txdata->enabled = 0;
 	spin_unlock_bh(&txdata->lock);
-	wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID;
+	wil->ring2cid_tid[ring_id][0] = max_assoc_sta;
 	wil->ring2cid_tid[ring_id][1] = 0;
 	return rc;
 }
@@ -1120,7 +1197,7 @@ int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size)
 	if (rc)
 		goto out;
 
-	wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */
+	wil->ring2cid_tid[id][0] = max_assoc_sta; /* CID */
 	wil->ring2cid_tid[id][1] = 0; /* TID */
 
 	cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa);
@@ -1167,7 +1244,7 @@ static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil,
 	int cid = wil_find_cid(wil, vif->mid, eth->h_dest);
 	int min_ring_id = wil_get_min_tx_ring_id(wil);
 
-	if (cid < 0)
+	if (cid < 0 || cid >= max_assoc_sta)
 		return NULL;
 
 	/* TODO: fix for multiple TID */
@@ -1219,7 +1296,7 @@ static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil,
 			continue;
 
 		cid = wil->ring2cid_tid[i][0];
-		if (cid >= WIL6210_MAX_CID) /* skip BCAST */
+		if (cid >= max_assoc_sta) /* skip BCAST */
 			continue;
 
 		if (!wil->ring_tx_data[i].dot1x_open &&
@@ -1298,7 +1375,7 @@ static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil,
 			continue;
 
 		cid = wil->ring2cid_tid[i][0];
-		if (cid >= WIL6210_MAX_CID) /* skip BCAST */
+		if (cid >= max_assoc_sta) /* skip BCAST */
 			continue;
 		if (!wil->ring_tx_data[i].dot1x_open &&
 		    skb->protocol != cpu_to_be16(ETH_P_PAE))
@@ -1326,7 +1403,7 @@ static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil,
 		if (!v2->va || txdata2->mid != vif->mid)
 			continue;
 		cid = wil->ring2cid_tid[i][0];
-		if (cid >= WIL6210_MAX_CID) /* skip BCAST */
+		if (cid >= max_assoc_sta) /* skip BCAST */
 			continue;
 		if (!wil->ring_tx_data[i].dot1x_open &&
 		    skb->protocol != cpu_to_be16(ETH_P_PAE))
@@ -2179,7 +2256,7 @@ int wil_tx_complete(struct wil6210_vif *vif, int ringid)
 
 	used_before_complete = wil_ring_used_tx(vring);
 
-	if (cid < WIL6210_MAX_CID)
+	if (cid < max_assoc_sta)
 		stats = &wil->sta[cid].stats;
 
 	while (!wil_ring_is_empty(vring)) {
@@ -2288,7 +2365,7 @@ static void wil_get_reorder_params(struct wil6210_priv *wil,
 	struct vring_rx_desc *d = wil_skb_rxdesc(skb);
 
 	*tid = wil_rxdesc_tid(d);
-	*cid = wil_rxdesc_cid(d);
+	*cid = wil_skb_get_cid(skb);
 	*mid = wil_rxdesc_mid(d);
 	*seq = wil_rxdesc_seq(d);
 	*mcast = wil_rxdesc_mcast(d);

drivers/net/wireless/ath/wil6210/txrx.h

@@ -458,6 +458,18 @@ union wil_ring_desc {
 	union wil_rx_desc rx;
 } __packed;
 
+struct packet_rx_info {
+	u8 cid;
+};
+
+/* this struct will be stored in the skb cb buffer
+ * max length of the struct is limited to 48 bytes
+ */
+struct skb_rx_info {
+	struct vring_rx_desc rx_desc;
+	struct packet_rx_info rx_info;
+};
+
 static inline int wil_rxdesc_tid(struct vring_rx_desc *d)
 {
 	return WIL_GET_BITS(d->mac.d0, 0, 3);
@@ -605,6 +617,20 @@ static inline bool wil_val_in_range(int val, int min, int max)
 	return val >= min && val < max;
 }
 
+static inline u8 wil_skb_get_cid(struct sk_buff *skb)
+{
+	struct skb_rx_info *skb_rx_info = (void *)skb->cb;
+
+	return skb_rx_info->rx_info.cid;
+}
+
+static inline void wil_skb_set_cid(struct sk_buff *skb, u8 cid)
+{
+	struct skb_rx_info *skb_rx_info = (void *)skb->cb;
+
+	skb_rx_info->rx_info.cid = cid;
+}
+
 void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev);
 void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb);
 void wil_rx_bar(struct wil6210_priv *wil, struct wil6210_vif *vif,

drivers/net/wireless/ath/wil6210/txrx_edma.c

 /*
- * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -727,7 +727,7 @@ static int wil_ring_init_tx_edma(struct wil6210_vif *vif, int ring_id,
 	txdata->enabled = 0;
 	spin_unlock_bh(&txdata->lock);
 	wil_ring_free_edma(wil, ring);
-	wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID;
+	wil->ring2cid_tid[ring_id][0] = max_assoc_sta;
 	wil->ring2cid_tid[ring_id][1] = 0;
 
  out:
@@ -932,7 +932,7 @@ static struct sk_buff *wil_sring_reap_rx_edma(struct wil6210_priv *wil,
 	eop = wil_rx_status_get_eop(msg);
 
 	cid = wil_rx_status_get_cid(msg);
-	if (unlikely(!wil_val_in_range(cid, 0, WIL6210_MAX_CID))) {
+	if (unlikely(!wil_val_in_range(cid, 0, max_assoc_sta))) {
 		wil_err(wil, "Corrupt cid=%d, sring->swhead=%d\n",
 			cid, sring->swhead);
 		rxdata->skipping = true;
@@ -1187,7 +1187,7 @@ int wil_tx_sring_handler(struct wil6210_priv *wil,
 		ndev = vif_to_ndev(vif);
 
 		cid = wil->ring2cid_tid[ring_id][0];
-		if (cid < WIL6210_MAX_CID)
+		if (cid < max_assoc_sta)
 			stats = &wil->sta[cid].stats;
 
 		wil_dbg_txrx(wil,

drivers/net/wireless/ath/wil6210/wil6210.h

@@ -39,6 +39,7 @@ extern bool debug_fw;
 extern bool disable_ap_sme;
 extern bool ftm_mode;
 extern bool drop_if_ring_full;
+extern uint max_assoc_sta;
 
 struct wil6210_priv;
 struct wil6210_vif;
@@ -90,7 +91,8 @@ static inline u32 WIL_GET_BITS(u32 x, int b0, int b1)
 #define WIL_RING_SIZE_ORDER_MIN	(5)
 #define WIL_RING_SIZE_ORDER_MAX	(15)
 #define WIL6210_MAX_TX_RINGS	(24) /* HW limit */
-#define WIL6210_MAX_CID		(8) /* HW limit */
+#define WIL6210_MAX_CID		(20) /* max number of stations */
+#define WIL6210_RX_DESC_MAX_CID	(8)  /* HW limit */
 #define WIL6210_NAPI_BUDGET	(16) /* arbitrary */
 #define WIL_MAX_AMPDU_SIZE	(64 * 1024) /* FW/HW limit */
 #define WIL_MAX_AGG_WSIZE	(32) /* FW/HW limit */
@@ -458,7 +460,7 @@ static inline void parse_cidxtid(u8 cidxtid, u8 *cid, u8 *tid)
  */
 static inline bool wil_cid_valid(u8 cid)
 {
-	return cid < WIL6210_MAX_CID;
+	return (cid >= 0 && cid < max_assoc_sta);
 }
 
 struct wil6210_mbox_ring {
@@ -1236,7 +1238,7 @@ int wmi_disconnect_sta(struct wil6210_vif *vif, const u8 *mac, u16 reason,
 int wmi_addba(struct wil6210_priv *wil, u8 mid,
 	      u8 ringid, u8 size, u16 timeout);
 int wmi_delba_tx(struct wil6210_priv *wil, u8 mid, u8 ringid, u16 reason);
-int wmi_delba_rx(struct wil6210_priv *wil, u8 mid, u8 cidxtid, u16 reason);
+int wmi_delba_rx(struct wil6210_priv *wil, u8 mid, u8 cid, u8 tid, u16 reason);
 int wmi_addba_rx_resp(struct wil6210_priv *wil,
 		      u8 mid, u8 cid, u8 tid, u8 token,
 		      u16 status, bool amsdu, u16 agg_wsize, u16 timeout);
@@ -1249,8 +1251,8 @@ int wmi_port_allocate(struct wil6210_priv *wil, u8 mid,
 		      const u8 *mac, enum nl80211_iftype iftype);
 int wmi_port_delete(struct wil6210_priv *wil, u8 mid);
 int wmi_link_stats_cfg(struct wil6210_vif *vif, u32 type, u8 cid, u32 interval);
-int wil_addba_rx_request(struct wil6210_priv *wil, u8 mid,
-			 u8 cidxtid, u8 dialog_token, __le16 ba_param_set,
+int wil_addba_rx_request(struct wil6210_priv *wil, u8 mid, u8 cid, u8 tid,
+			 u8 dialog_token, __le16 ba_param_set,
 			 __le16 ba_timeout, __le16 ba_seq_ctrl);
 int wil_addba_tx_request(struct wil6210_priv *wil, u8 ringid, u16 wsize);
 

drivers/net/wireless/ath/wil6210/wmi.c

@@ -24,8 +24,9 @@
 #include "wmi.h"
 #include "trace.h"
 
-static uint max_assoc_sta = WIL6210_MAX_CID;
-module_param(max_assoc_sta, uint, 0644);
+/* set the default max assoc sta to max supported by driver */
+uint max_assoc_sta = WIL6210_MAX_CID;
+module_param(max_assoc_sta, uint, 0444);
 MODULE_PARM_DESC(max_assoc_sta, " Max number of stations associated to the AP");
 
 int agg_wsize; /* = 0; */
@@ -770,6 +771,7 @@ static void wmi_evt_ready(struct wil6210_vif *vif, int id, void *d, int len)
 	struct wil6210_priv *wil = vif_to_wil(vif);
 	struct wiphy *wiphy = wil_to_wiphy(wil);
 	struct wmi_ready_event *evt = d;
+	u8 fw_max_assoc_sta;
 
 	wil_info(wil, "FW ver. %s(SW %d); MAC %pM; %d MID's\n",
 		 wil->fw_version, le32_to_cpu(evt->sw_version),
@@ -787,6 +789,25 @@ static void wmi_evt_ready(struct wil6210_vif *vif, int id, void *d, int len)
 			    evt->rfc_read_calib_result);
 		wil->fw_calib_result = evt->rfc_read_calib_result;
 	}
+
+	fw_max_assoc_sta = WIL6210_RX_DESC_MAX_CID;
+	if (len > offsetof(struct wmi_ready_event, max_assoc_sta) &&
+	    evt->max_assoc_sta > 0) {
+		fw_max_assoc_sta = evt->max_assoc_sta;
+		wil_dbg_wmi(wil, "fw reported max assoc sta %d\n",
+			    fw_max_assoc_sta);
+
+		if (fw_max_assoc_sta > WIL6210_MAX_CID) {
+			wil_dbg_wmi(wil,
+				    "fw max assoc sta %d exceeds max driver supported %d\n",
+				    fw_max_assoc_sta, WIL6210_MAX_CID);
+			fw_max_assoc_sta = WIL6210_MAX_CID;
+		}
+	}
+
+	max_assoc_sta = min_t(uint, max_assoc_sta, fw_max_assoc_sta);
+	wil_dbg_wmi(wil, "setting max assoc sta to %d\n", max_assoc_sta);
+
 	wil_set_recovery_state(wil, fw_recovery_idle);
 	set_bit(wil_status_fwready, wil->status);
 	/* let the reset sequence continue */
@@ -952,7 +973,7 @@ static void wmi_evt_connect(struct wil6210_vif *vif, int id, void *d, int len)
 			evt->assoc_req_len, evt->assoc_resp_len);
 		return;
 	}
-	if (evt->cid >= WIL6210_MAX_CID) {
+	if (evt->cid >= max_assoc_sta) {
 		wil_err(wil, "Connect CID invalid : %d\n", evt->cid);
 		return;
 	}
@@ -1271,9 +1292,16 @@ static void wmi_evt_addba_rx_req(struct wil6210_vif *vif, int id,
 				 void *d, int len)
 {
 	struct wil6210_priv *wil = vif_to_wil(vif);
+	u8 cid, tid;
 	struct wmi_rcp_addba_req_event *evt = d;
 
-	wil_addba_rx_request(wil, vif->mid, evt->cidxtid, evt->dialog_token,
+	if (evt->cidxtid != CIDXTID_EXTENDED_CID_TID) {
+		parse_cidxtid(evt->cidxtid, &cid, &tid);
+	} else {
+		cid = evt->cid;
+		tid = evt->tid;
+	}
+	wil_addba_rx_request(wil, vif->mid, cid, tid, evt->dialog_token,
 			     evt->ba_param_set, evt->ba_timeout,
 			     evt->ba_seq_ctrl);
 }
@@ -1289,7 +1317,13 @@ __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 	struct wil_tid_ampdu_rx *r;
 
 	might_sleep();
-	parse_cidxtid(evt->cidxtid, &cid, &tid);
+
+	if (evt->cidxtid != CIDXTID_EXTENDED_CID_TID) {
+		parse_cidxtid(evt->cidxtid, &cid, &tid);
+	} else {
+		cid = evt->cid;
+		tid = evt->tid;
+	}
 	wil_dbg_wmi(wil, "DELBA MID %d CID %d TID %d from %s reason %d\n",
 		    vif->mid, cid, tid,
 		    evt->from_initiator ? "originator" : "recipient",
@@ -1404,7 +1438,7 @@ static void wil_link_stats_store_basic(struct wil6210_vif *vif,
 	u8 cid = basic->cid;
 	struct wil_sta_info *sta;
 
-	if (cid < 0 || cid >= WIL6210_MAX_CID) {
+	if (cid < 0 || cid >= max_assoc_sta) {
 		wil_err(wil, "invalid cid %d\n", cid);
 		return;
 	}
@@ -1554,7 +1588,7 @@ static int wil_find_cid_ringid_sta(struct wil6210_priv *wil,
 			continue;
 
 		lcid = wil->ring2cid_tid[i][0];
-		if (lcid >= WIL6210_MAX_CID) /* skip BCAST */
+		if (lcid >= max_assoc_sta) /* skip BCAST */
 			continue;
 
 		wil_dbg_wmi(wil, "find sta -> ringid %d cid %d\n", i, lcid);
@@ -2120,10 +2154,9 @@ int wmi_pcp_start(struct wil6210_vif *vif,
 
 	if ((cmd.pcp_max_assoc_sta > WIL6210_MAX_CID) ||
 	    (cmd.pcp_max_assoc_sta <= 0)) {
-		wil_info(wil,
-			 "Requested connection limit %u, valid values are 1 - %d. Setting to %d\n",
-			 max_assoc_sta, WIL6210_MAX_CID, WIL6210_MAX_CID);
-		cmd.pcp_max_assoc_sta = WIL6210_MAX_CID;
+		wil_err(wil, "unexpected max_assoc_sta %d\n",
+			cmd.pcp_max_assoc_sta);
+		return -EOPNOTSUPP;
 	}
 
 	if (disable_ap_sme &&
@@ -2651,15 +2684,22 @@ int wmi_delba_tx(struct wil6210_priv *wil, u8 mid, u8 ringid, u16 reason)
 	return wmi_send(wil, WMI_RING_BA_DIS_CMDID, mid, &cmd, sizeof(cmd));
 }
 
-int wmi_delba_rx(struct wil6210_priv *wil, u8 mid, u8 cidxtid, u16 reason)
+int wmi_delba_rx(struct wil6210_priv *wil, u8 mid, u8 cid, u8 tid, u16 reason)
 {
 	struct wmi_rcp_delba_cmd cmd = {
-		.cidxtid = cidxtid,
 		.reason = cpu_to_le16(reason),
 	};
 
-	wil_dbg_wmi(wil, "delba_rx: (CID %d TID %d reason %d)\n", cidxtid & 0xf,
-		    (cidxtid >> 4) & 0xf, reason);
+	if (cid >= WIL6210_RX_DESC_MAX_CID) {
+		cmd.cidxtid = CIDXTID_EXTENDED_CID_TID;
+		cmd.cid = cid;
+		cmd.tid = tid;
+	} else {
+		cmd.cidxtid = mk_cidxtid(cid, tid);
+	}
+
+	wil_dbg_wmi(wil, "delba_rx: (CID %d TID %d reason %d)\n", cid,
+		    tid, reason);
 
 	return wmi_send(wil, WMI_RCP_DELBA_CMDID, mid, &cmd, sizeof(cmd));
 }
@@ -2670,7 +2710,6 @@ int wmi_addba_rx_resp(struct wil6210_priv *wil,
 {
 	int rc;
 	struct wmi_rcp_addba_resp_cmd cmd = {
-		.cidxtid = mk_cidxtid(cid, tid),
 		.dialog_token = token,
 		.status_code = cpu_to_le16(status),
 		/* bit 0: A-MSDU supported
@@ -2689,6 +2728,14 @@ int wmi_addba_rx_resp(struct wil6210_priv *wil,
 		.evt = {.status = cpu_to_le16(WMI_FW_STATUS_FAILURE)},
 	};
 
+	if (cid >= WIL6210_RX_DESC_MAX_CID) {
+		cmd.cidxtid = CIDXTID_EXTENDED_CID_TID;
+		cmd.cid = cid;
+		cmd.tid = tid;
+	} else {
+		cmd.cidxtid = mk_cidxtid(cid, tid);
+	}
+
 	wil_dbg_wmi(wil,
 		    "ADDBA response for MID %d CID %d TID %d size %d timeout %d status %d AMSDU%s\n",
 		    mid, cid, tid, agg_wsize,