1 files changed, 266 insertions, 11 deletions

diff --git a/drivers/net/wireless/ath/wil6210/rx_reorder.c b/drivers/net/wireless/ath/wil6210/rx_reorder.c
index 489cb73d139b..ca10dcf0986e 100644
--- a/drivers/net/wireless/ath/wil6210/rx_reorder.c
+++ b/drivers/net/wireless/ath/wil6210/rx_reorder.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014 Qualcomm Atheros, Inc.
+ * Copyright (c) 2014-2015 Qualcomm Atheros, Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -89,7 +89,9 @@ static void wil_reorder_release(struct wil6210_priv *wil,
 	}
 }
 
+/* called in NAPI context */
 void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb)
+__acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 {
 	struct net_device *ndev = wil_to_ndev(wil);
 	struct vring_rx_desc *d = wil_skb_rxdesc(skb);
@@ -97,22 +99,26 @@ void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb)
 	int cid = wil_rxdesc_cid(d);
 	int mid = wil_rxdesc_mid(d);
 	u16 seq = wil_rxdesc_seq(d);
+	int mcast = wil_rxdesc_mcast(d);
 	struct wil_sta_info *sta = &wil->sta[cid];
 	struct wil_tid_ampdu_rx *r;
 	u16 hseq;
 	int index;
-	unsigned long flags;
 
-	wil_dbg_txrx(wil, "MID %d CID %d TID %d Seq 0x%03x\n",
-		     mid, cid, tid, seq);
+	wil_dbg_txrx(wil, "MID %d CID %d TID %d Seq 0x%03x mcast %01x\n",
+		     mid, cid, tid, seq, mcast);
 
-	spin_lock_irqsave(&sta->tid_rx_lock, flags);
+	if (unlikely(mcast)) {
+		wil_netif_rx_any(skb, ndev);
+		return;
+	}
+
+	spin_lock(&sta->tid_rx_lock);
 
 	r = sta->tid_rx[tid];
 	if (!r) {
-		spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
 		wil_netif_rx_any(skb, ndev);
-		return;
+		goto out;
 	}
 
 	hseq = r->head_seq_num;
@@ -121,13 +127,24 @@ void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb)
 	 * reported, and data Rx, few packets may be pass up before reorder
 	 * buffer get allocated. Catch up by pretending SSN is what we
 	 * see in the 1-st Rx packet
+	 *
+	 * Another scenario, Rx get delayed and we got packet from before
+	 * BACK. Pass it to the stack and wait.
 	 */
 	if (r->first_time) {
 		r->first_time = false;
 		if (seq != r->head_seq_num) {
-			wil_err(wil, "Error: 1-st frame with wrong sequence"
-				" %d, should be %d. Fixing...\n", seq,
-				r->head_seq_num);
+			if (seq_less(seq, r->head_seq_num)) {
+				wil_err(wil,
+					"Error: frame with early sequence 0x%03x, should be 0x%03x. Waiting...\n",
+					seq, r->head_seq_num);
+				r->first_time = true;
+				wil_netif_rx_any(skb, ndev);
+				goto out;
+			}
+			wil_err(wil,
+				"Error: 1-st frame with wrong sequence 0x%03x, should be 0x%03x. Fixing...\n",
+				seq, r->head_seq_num);
 			r->head_seq_num = seq;
 			r->ssn = seq;
 		}
@@ -179,7 +196,7 @@ void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb)
 	wil_reorder_release(wil, r);
 
 out:
-	spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
+	spin_unlock(&sta->tid_rx_lock);
 }
 
 struct wil_tid_ampdu_rx *wil_tid_ampdu_rx_alloc(struct wil6210_priv *wil,
@@ -219,3 +236,241 @@ void wil_tid_ampdu_rx_free(struct wil6210_priv *wil,
 	kfree(r->reorder_time);
 	kfree(r);
 }
+
+/* ADDBA processing */
+static u16 wil_agg_size(struct wil6210_priv *wil, u16 req_agg_wsize)
+{
+	u16 max_agg_size = min_t(u16, WIL_MAX_AGG_WSIZE, WIL_MAX_AMPDU_SIZE /
+				 (mtu_max + WIL_MAX_MPDU_OVERHEAD));
+
+	if (!req_agg_wsize)
+		return max_agg_size;
+
+	return min(max_agg_size, req_agg_wsize);
+}
+
+/* Block Ack - Rx side (recipient */
+int wil_addba_rx_request(struct wil6210_priv *wil, u8 cidxtid,
+			 u8 dialog_token, __le16 ba_param_set,
+			 __le16 ba_timeout, __le16 ba_seq_ctrl)
+{
+	struct wil_back_rx *req = kzalloc(sizeof(*req), GFP_KERNEL);
+
+	if (!req)
+		return -ENOMEM;
+
+	req->cidxtid = cidxtid;
+	req->dialog_token = dialog_token;
+	req->ba_param_set = le16_to_cpu(ba_param_set);
+	req->ba_timeout = le16_to_cpu(ba_timeout);
+	req->ba_seq_ctrl = le16_to_cpu(ba_seq_ctrl);
+
+	mutex_lock(&wil->back_rx_mutex);
+	list_add_tail(&req->list, &wil->back_rx_pending);
+	mutex_unlock(&wil->back_rx_mutex);
+
+	queue_work(wil->wq_service, &wil->back_rx_worker);
+
+	return 0;
+}
+
+static void wil_back_rx_handle(struct wil6210_priv *wil,
+			       struct wil_back_rx *req)
+__acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
+{
+	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)
+	 * bits 2..5: TID
+	 * bits 6..15: buffer size
+	 */
+	u16 req_agg_wsize = WIL_GET_BITS(req->ba_param_set, 6, 15);
+	bool agg_amsdu = !!(req->ba_param_set & BIT(0));
+	int ba_policy = req->ba_param_set & BIT(1);
+	u16 agg_timeout = req->ba_timeout;
+	u16 status = WLAN_STATUS_SUCCESS;
+	u16 ssn = req->ba_seq_ctrl >> 4;
+	struct wil_tid_ampdu_rx *r;
+	int rc;
+
+	might_sleep();
+	parse_cidxtid(req->cidxtid, &cid, &tid);
+
+	/* sanity checks */
+	if (cid >= WIL6210_MAX_CID) {
+		wil_err(wil, "BACK: invalid CID %d\n", cid);
+		return;
+	}
+
+	sta = &wil->sta[cid];
+	if (sta->status != wil_sta_connected) {
+		wil_err(wil, "BACK: CID %d not connected\n", cid);
+		return;
+	}
+
+	wil_dbg_wmi(wil,
+		    "ADDBA request for CID %d %pM TID %d size %d timeout %d AMSDU%s policy %d token %d SSN 0x%03x\n",
+		    cid, sta->addr, tid, req_agg_wsize, req->ba_timeout,
+		    agg_amsdu ? "+" : "-", !!ba_policy, req->dialog_token, ssn);
+
+	/* apply policies */
+	if (ba_policy) {
+		wil_err(wil, "BACK requested unsupported ba_policy == 1\n");
+		status = WLAN_STATUS_INVALID_QOS_PARAM;
+	}
+	if (status == WLAN_STATUS_SUCCESS)
+		agg_wsize = wil_agg_size(wil, req_agg_wsize);
+
+	rc = wmi_addba_rx_resp(wil, cid, tid, req->dialog_token, status,
+			       agg_amsdu, agg_wsize, agg_timeout);
+	if (rc || (status != WLAN_STATUS_SUCCESS))
+		return;
+
+	/* apply */
+	r = wil_tid_ampdu_rx_alloc(wil, agg_wsize, ssn);
+	spin_lock_bh(&sta->tid_rx_lock);
+	wil_tid_ampdu_rx_free(wil, sta->tid_rx[tid]);
+	sta->tid_rx[tid] = r;
+	spin_unlock_bh(&sta->tid_rx_lock);
+}
+
+void wil_back_rx_flush(struct wil6210_priv *wil)
+{
+	struct wil_back_rx *evt, *t;
+
+	wil_dbg_misc(wil, "%s()\n", __func__);
+
+	mutex_lock(&wil->back_rx_mutex);
+
+	list_for_each_entry_safe(evt, t, &wil->back_rx_pending, list) {
+		list_del(&evt->list);
+		kfree(evt);
+	}
+
+	mutex_unlock(&wil->back_rx_mutex);
+}
+
+/* Retrieve next ADDBA request from the pending list */
+static struct list_head *next_back_rx(struct wil6210_priv *wil)
+{
+	struct list_head *ret = NULL;
+
+	mutex_lock(&wil->back_rx_mutex);
+
+	if (!list_empty(&wil->back_rx_pending)) {
+		ret = wil->back_rx_pending.next;
+		list_del(ret);
+	}
+
+	mutex_unlock(&wil->back_rx_mutex);
+
+	return ret;
+}
+
+void wil_back_rx_worker(struct work_struct *work)
+{
+	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
+						back_rx_worker);
+	struct wil_back_rx *evt;
+	struct list_head *lh;
+
+	while ((lh = next_back_rx(wil)) != NULL) {
+		evt = list_entry(lh, struct wil_back_rx, list);
+
+		wil_back_rx_handle(wil, evt);
+		kfree(evt);
+	}
+}
+
+/* BACK - Tx (originator) side */
+static void wil_back_tx_handle(struct wil6210_priv *wil,
+			       struct wil_back_tx *req)
+{
+	struct vring_tx_data *txdata = &wil->vring_tx_data[req->ringid];
+	int rc;
+
+	if (txdata->addba_in_progress) {
+		wil_dbg_misc(wil, "ADDBA for vring[%d] already in progress\n",
+			     req->ringid);
+		return;
+	}
+	if (txdata->agg_wsize) {
+		wil_dbg_misc(wil,
+			     "ADDBA for vring[%d] already established wsize %d\n",
+			     req->ringid, txdata->agg_wsize);
+		return;
+	}
+	txdata->addba_in_progress = true;
+	rc = wmi_addba(wil, req->ringid, req->agg_wsize, req->agg_timeout);
+	if (rc)
+		txdata->addba_in_progress = false;
+}
+
+static struct list_head *next_back_tx(struct wil6210_priv *wil)
+{
+	struct list_head *ret = NULL;
+
+	mutex_lock(&wil->back_tx_mutex);
+
+	if (!list_empty(&wil->back_tx_pending)) {
+		ret = wil->back_tx_pending.next;
+		list_del(ret);
+	}
+
+	mutex_unlock(&wil->back_tx_mutex);
+
+	return ret;
+}
+
+void wil_back_tx_worker(struct work_struct *work)
+{
+	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
+						 back_tx_worker);
+	struct wil_back_tx *evt;
+	struct list_head *lh;
+
+	while ((lh = next_back_tx(wil)) != NULL) {
+		evt = list_entry(lh, struct wil_back_tx, list);
+
+		wil_back_tx_handle(wil, evt);
+		kfree(evt);
+	}
+}
+
+void wil_back_tx_flush(struct wil6210_priv *wil)
+{
+	struct wil_back_tx *evt, *t;
+
+	wil_dbg_misc(wil, "%s()\n", __func__);
+
+	mutex_lock(&wil->back_tx_mutex);
+
+	list_for_each_entry_safe(evt, t, &wil->back_tx_pending, list) {
+		list_del(&evt->list);
+		kfree(evt);
+	}
+
+	mutex_unlock(&wil->back_tx_mutex);
+}
+
+int wil_addba_tx_request(struct wil6210_priv *wil, u8 ringid, u16 wsize)
+{
+	struct wil_back_tx *req = kzalloc(sizeof(*req), GFP_KERNEL);
+
+	if (!req)
+		return -ENOMEM;
+
+	req->ringid = ringid;
+	req->agg_wsize = wil_agg_size(wil, wsize);
+	req->agg_timeout = 0;
+
+	mutex_lock(&wil->back_tx_mutex);
+	list_add_tail(&req->list, &wil->back_tx_pending);
+	mutex_unlock(&wil->back_tx_mutex);
+
+	queue_work(wil->wq_service, &wil->back_tx_worker);
+
+	return 0;
+}