1 files changed, 114 insertions, 41 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index fb9bcfa6d947..888a8e9fe9ef 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -97,7 +97,8 @@ int iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq)
                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
 
                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
-                        IWL_DEBUG_INFO(priv, "Requesting wakeup, GP1 = 0x%x\n", reg);
+                        IWL_DEBUG_INFO(priv, "Tx queue %d requesting wakeup, GP1 = 0x%x\n",
+                                      txq_id, reg);
                         iwl_set_bit(priv, CSR_GP_CNTRL,
                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
                         return ret;
@@ -132,7 +133,7 @@ void iwl_tx_queue_free(struct iwl_priv *priv, int txq_id)
         struct iwl_tx_queue *txq = &priv->txq[txq_id];
         struct iwl_queue *q = &txq->q;
         struct pci_dev *dev = priv->pci_dev;
-        int i, len;
+        int i;
 
         if (q->n_bd == 0)
                 return;
@@ -142,8 +143,6 @@ void iwl_tx_queue_free(struct iwl_priv *priv, int txq_id)
              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
                 priv->cfg->ops->lib->txq_free_tfd(priv, txq);
 
-        len = sizeof(struct iwl_device_cmd) * q->n_window;
-
         /* De-alloc array of command/tx buffers */
         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
                 kfree(txq->cmd[i]);
@@ -181,14 +180,11 @@ void iwl_cmd_queue_free(struct iwl_priv *priv)
         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
         struct iwl_queue *q = &txq->q;
         struct pci_dev *dev = priv->pci_dev;
-        int i, len;
+        int i;
 
         if (q->n_bd == 0)
                 return;
 
-        len = sizeof(struct iwl_device_cmd) * q->n_window;
-        len += IWL_MAX_SCAN_SIZE;
-
         /* De-alloc array of command/tx buffers */
         for (i = 0; i <= TFD_CMD_SLOTS; i++)
                 kfree(txq->cmd[i]);
@@ -370,8 +366,13 @@ int iwl_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq,
 
         txq->need_update = 0;
 
-        /* aggregation TX queues will get their ID when aggregation begins */
-        if (txq_id <= IWL_TX_FIFO_AC3)
+        /*
+         * Aggregation TX queues will get their ID when aggregation begins;
+         * they overwrite the setting done here. The command FIFO doesn't
+         * need an swq_id so don't set one to catch errors, all others can
+         * be set up to the identity mapping.
+         */
+        if (txq_id != IWL_CMD_QUEUE_NUM)
                 txq->swq_id = txq_id;
 
         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
@@ -406,15 +407,19 @@ void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
         int txq_id;
 
         /* Tx queues */
-        for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
-                if (txq_id == IWL_CMD_QUEUE_NUM)
-                        iwl_cmd_queue_free(priv);
-                else
-                        iwl_tx_queue_free(priv, txq_id);
-
+        if (priv->txq)
+                for (txq_id = 0; txq_id < priv->hw_params.max_txq_num;
+                     txq_id++)
+                        if (txq_id == IWL_CMD_QUEUE_NUM)
+                                iwl_cmd_queue_free(priv);
+                        else
+                                iwl_tx_queue_free(priv, txq_id);
         iwl_free_dma_ptr(priv, &priv->kw);
 
         iwl_free_dma_ptr(priv, &priv->scd_bc_tbls);
+
+        /* free tx queue structure */
+        iwl_free_txq_mem(priv);
 }
 EXPORT_SYMBOL(iwl_hw_txq_ctx_free);
 
@@ -446,6 +451,12 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv)
                 IWL_ERR(priv, "Keep Warm allocation failed\n");
                 goto error_kw;
         }
+
+        /* allocate tx queue structure */
+        ret = iwl_alloc_txq_mem(priv);
+        if (ret)
+                goto error;
+
         spin_lock_irqsave(&priv->lock, flags);
 
         /* Turn off all Tx DMA fifos */
@@ -582,9 +593,7 @@ static void iwl_tx_cmd_build_rate(struct iwl_priv *priv,
         u8 rate_plcp;
 
         /* Set retry limit on DATA packets and Probe Responses*/
-        if (priv->data_retry_limit != -1)
-                data_retry_limit = priv->data_retry_limit;
-        else if (ieee80211_is_probe_resp(fc))
+        if (ieee80211_is_probe_resp(fc))
                 data_retry_limit = 3;
         else
                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
@@ -701,6 +710,8 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 {
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+        struct ieee80211_sta *sta = info->control.sta;
+        struct iwl_station_priv *sta_priv = NULL;
         struct iwl_tx_queue *txq;
         struct iwl_queue *q;
         struct iwl_device_cmd *out_cmd;
@@ -710,7 +721,7 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
         dma_addr_t phys_addr;
         dma_addr_t txcmd_phys;
         dma_addr_t scratch_phys;
-        u16 len, len_org;
+        u16 len, len_org, firstlen, secondlen;
         u16 seq_number = 0;
         __le16 fc;
         u8 hdr_len;
@@ -763,6 +774,24 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 
         IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
 
+        if (sta)
+                sta_priv = (void *)sta->drv_priv;
+
+        if (sta_priv && sta_id != priv->hw_params.bcast_sta_id &&
+            sta_priv->asleep) {
+                WARN_ON(!(info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE));
+                /*
+                 * This sends an asynchronous command to the device,
+                 * but we can rely on it being processed before the
+                 * next frame is processed -- and the next frame to
+                 * this station is the one that will consume this
+                 * counter.
+                 * For now set the counter to just 1 since we do not
+                 * support uAPSD yet.
+                 */
+                iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
+        }
+
         txq_id = skb_get_queue_mapping(skb);
         if (ieee80211_is_data_qos(fc)) {
                 qc = ieee80211_get_qos_ctl(hdr);
@@ -843,7 +872,7 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
                 sizeof(struct iwl_cmd_header) + hdr_len;
 
         len_org = len;
-        len = (len + 3) & ~3;
+        firstlen = len = (len + 3) & ~3;
 
         if (len_org != len)
                 len_org = 1;
@@ -877,7 +906,7 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 
         /* Set up TFD's 2nd entry to point directly to remainder of skb,
          * if any (802.11 null frames have no payload). */
-        len = skb->len - hdr_len;
+        secondlen = len = skb->len - hdr_len;
         if (len) {
                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
                                            len, PCI_DMA_TODEVICE);
@@ -911,11 +940,28 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
         pci_dma_sync_single_for_device(priv->pci_dev, txcmd_phys,
                                        len, PCI_DMA_BIDIRECTIONAL);
 
+        trace_iwlwifi_dev_tx(priv,
+                             &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr],
+                             sizeof(struct iwl_tfd),
+                             &out_cmd->hdr, firstlen,
+                             skb->data + hdr_len, secondlen);
+
         /* Tell device the write index *just past* this latest filled TFD */
         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
         ret = iwl_txq_update_write_ptr(priv, txq);
         spin_unlock_irqrestore(&priv->lock, flags);
 
+        /*
+         * At this point the frame is "transmitted" successfully
+         * and we will get a TX status notification eventually,
+         * regardless of the value of ret. "ret" only indicates
+         * whether or not we should update the write pointer.
+         */
+
+        /* avoid atomic ops if it isn't an associated client */
+        if (sta_priv && sta_priv->client)
+                atomic_inc(&sta_priv->pending_frames);
+
         if (ret)
                 return ret;
 
@@ -970,13 +1016,20 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
                !(cmd->flags & CMD_SIZE_HUGE));
 
-        if (iwl_is_rfkill(priv)) {
-                IWL_DEBUG_INFO(priv, "Not sending command - RF KILL\n");
+        if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
+                IWL_WARN(priv, "Not sending command - %s KILL\n",
+                         iwl_is_rfkill(priv) ? "RF" : "CT");
                 return -EIO;
         }
 
         if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
-                IWL_ERR(priv, "No space for Tx\n");
+                IWL_ERR(priv, "No space in command queue\n");
+                if (iwl_within_ct_kill_margin(priv))
+                        iwl_tt_enter_ct_kill(priv);
+                else {
+                        IWL_ERR(priv, "Restarting adapter due to queue full\n");
+                        queue_work(priv->workqueue, &priv->restart);
+                }
                 return -ENOSPC;
         }
 
@@ -1039,6 +1092,8 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
         pci_unmap_addr_set(out_meta, mapping, phys_addr);
         pci_unmap_len_set(out_meta, len, fix_size);
 
+        trace_iwlwifi_dev_hcmd(priv, &out_cmd->hdr, fix_size, cmd->flags);
+
         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
                                                    phys_addr, fix_size, 1,
                                                    U32_PAD(cmd->len));
@@ -1051,6 +1106,24 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
         return ret ? ret : idx;
 }
 
+static void iwl_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
+{
+        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+        struct ieee80211_sta *sta;
+        struct iwl_station_priv *sta_priv;
+
+        sta = ieee80211_find_sta(priv->vif, hdr->addr1);
+        if (sta) {
+                sta_priv = (void *)sta->drv_priv;
+                /* avoid atomic ops if this isn't a client */
+                if (sta_priv->client &&
+                    atomic_dec_return(&sta_priv->pending_frames) == 0)
+                        ieee80211_sta_block_awake(priv->hw, sta, false);
+        }
+
+        ieee80211_tx_status_irqsafe(priv->hw, skb);
+}
+
 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
 {
         struct iwl_tx_queue *txq = &priv->txq[txq_id];
@@ -1070,7 +1143,7 @@ int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 
                 tx_info = &txq->txb[txq->q.read_ptr];
-                ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]);
+                iwl_tx_status(priv, tx_info->skb[0]);
                 tx_info->skb[0] = NULL;
 
                 if (priv->cfg->ops->lib->txq_inval_byte_cnt_tbl)
@@ -1105,11 +1178,6 @@ static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id,
                 return;
         }
 
-        pci_unmap_single(priv->pci_dev,
-                pci_unmap_addr(&txq->meta[cmd_idx], mapping),
-                pci_unmap_len(&txq->meta[cmd_idx], len),
-                PCI_DMA_BIDIRECTIONAL);
-
         for (idx = iwl_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 
@@ -1132,7 +1200,7 @@ static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id,
  */
 void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 {
-        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
         int txq_id = SEQ_TO_QUEUE(sequence);
         int index = SEQ_TO_INDEX(sequence);
@@ -1157,12 +1225,17 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
         cmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
         meta = &priv->txq[IWL_CMD_QUEUE_NUM].meta[cmd_index];
 
+        pci_unmap_single(priv->pci_dev,
+                         pci_unmap_addr(meta, mapping),
+                         pci_unmap_len(meta, len),
+                         PCI_DMA_BIDIRECTIONAL);
+
         /* Input error checking is done when commands are added to queue. */
         if (meta->flags & CMD_WANT_SKB) {
-                meta->source->reply_skb = rxb->skb;
-                rxb->skb = NULL;
+                meta->source->reply_page = (unsigned long)rxb_addr(rxb);
+                rxb->page = NULL;
         } else if (meta->callback)
-                meta->callback(priv, cmd, rxb->skb);
+                meta->callback(priv, cmd, pkt);
 
         iwl_hcmd_queue_reclaim(priv, txq_id, index, cmd_index);
 
@@ -1240,7 +1313,7 @@ int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn)
         if (tid_data->tfds_in_queue == 0) {
                 IWL_DEBUG_HT(priv, "HW queue is empty\n");
                 tid_data->agg.state = IWL_AGG_ON;
-                ieee80211_start_tx_ba_cb_irqsafe(priv->hw, ra, tid);
+                ieee80211_start_tx_ba_cb_irqsafe(priv->vif, ra, tid);
         } else {
                 IWL_DEBUG_HT(priv, "HW queue is NOT empty: %d packets in HW queue\n",
                              tid_data->tfds_in_queue);
@@ -1305,7 +1378,7 @@ int iwl_tx_agg_stop(struct iwl_priv *priv , const u8 *ra, u16 tid)
         if (ret)
                 return ret;
 
-        ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid);
+        ieee80211_stop_tx_ba_cb_irqsafe(priv->vif, ra, tid);
 
         return 0;
 }
@@ -1329,7 +1402,7 @@ int iwl_txq_check_empty(struct iwl_priv *priv, int sta_id, u8 tid, int txq_id)
                         priv->cfg->ops->lib->txq_agg_disable(priv, txq_id,
                                                              ssn, tx_fifo);
                         tid_data->agg.state = IWL_AGG_OFF;
-                        ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
+                        ieee80211_stop_tx_ba_cb_irqsafe(priv->vif, addr, tid);
                 }
                 break;
         case IWL_EMPTYING_HW_QUEUE_ADDBA:
@@ -1337,7 +1410,7 @@ int iwl_txq_check_empty(struct iwl_priv *priv, int sta_id, u8 tid, int txq_id)
                 if (tid_data->tfds_in_queue == 0) {
                         IWL_DEBUG_HT(priv, "HW queue empty: continue ADDBA flow\n");
                         tid_data->agg.state = IWL_AGG_ON;
-                        ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
+                        ieee80211_start_tx_ba_cb_irqsafe(priv->vif, addr, tid);
                 }
                 break;
         }
@@ -1401,7 +1474,7 @@ static int iwl_tx_status_reply_compressed_ba(struct iwl_priv *priv,
 
         info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb[0]);
         memset(&info->status, 0, sizeof(info->status));
-        info->flags = IEEE80211_TX_STAT_ACK;
+        info->flags |= IEEE80211_TX_STAT_ACK;
         info->flags |= IEEE80211_TX_STAT_AMPDU;
         info->status.ampdu_ack_map = successes;
         info->status.ampdu_ack_len = agg->frame_count;
@@ -1421,7 +1494,7 @@ static int iwl_tx_status_reply_compressed_ba(struct iwl_priv *priv,
 void iwl_rx_reply_compressed_ba(struct iwl_priv *priv,
                                            struct iwl_rx_mem_buffer *rxb)
 {
-        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
         struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
         struct iwl_tx_queue *txq = NULL;
         struct iwl_ht_agg *agg;