iwlegacy: gather all 4965 handlers in one place
Handers belongs logically into 4965-mac.c file.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlegacy/4965-mac.c b/drivers/net/wireless/iwlegacy/4965-mac.c
index 7bf78bf..4560021 100644
--- a/drivers/net/wireless/iwlegacy/4965-mac.c
+++ b/drivers/net/wireless/iwlegacy/4965-mac.c
@@ -2548,6 +2548,308 @@
return 0;
}
+static inline bool
+il4965_is_tx_success(u32 status)
+{
+ status &= TX_STATUS_MSK;
+ return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
+}
+
+static u8
+il4965_find_station(struct il_priv *il, const u8 *addr)
+{
+ int i;
+ int start = 0;
+ int ret = IL_INVALID_STATION;
+ unsigned long flags;
+
+ if (il->iw_mode == NL80211_IFTYPE_ADHOC)
+ start = IL_STA_ID;
+
+ if (is_broadcast_ether_addr(addr))
+ return il->hw_params.bcast_id;
+
+ spin_lock_irqsave(&il->sta_lock, flags);
+ for (i = start; i < il->hw_params.max_stations; i++)
+ if (il->stations[i].used &&
+ (!compare_ether_addr(il->stations[i].sta.sta.addr, addr))) {
+ ret = i;
+ goto out;
+ }
+
+ D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
+
+out:
+ /*
+ * It may be possible that more commands interacting with stations
+ * arrive before we completed processing the adding of
+ * station
+ */
+ if (ret != IL_INVALID_STATION &&
+ (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
+ ((il->stations[ret].used & IL_STA_UCODE_ACTIVE) &&
+ (il->stations[ret].used & IL_STA_UCODE_INPROGRESS)))) {
+ IL_ERR("Requested station info for sta %d before ready.\n",
+ ret);
+ ret = IL_INVALID_STATION;
+ }
+ spin_unlock_irqrestore(&il->sta_lock, flags);
+ return ret;
+}
+
+static int
+il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
+{
+ if (il->iw_mode == NL80211_IFTYPE_STATION)
+ return IL_AP_ID;
+ else {
+ u8 *da = ieee80211_get_DA(hdr);
+
+ return il4965_find_station(il, da);
+ }
+}
+
+static inline u32
+il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
+{
+ return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
+}
+
+static inline u32
+il4965_tx_status_to_mac80211(u32 status)
+{
+ status &= TX_STATUS_MSK;
+
+ switch (status) {
+ case TX_STATUS_SUCCESS:
+ case TX_STATUS_DIRECT_DONE:
+ return IEEE80211_TX_STAT_ACK;
+ case TX_STATUS_FAIL_DEST_PS:
+ return IEEE80211_TX_STAT_TX_FILTERED;
+ default:
+ return 0;
+ }
+}
+
+/**
+ * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
+ */
+static int
+il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
+ struct il4965_tx_resp *tx_resp, int txq_id,
+ u16 start_idx)
+{
+ u16 status;
+ struct agg_tx_status *frame_status = tx_resp->u.agg_status;
+ struct ieee80211_tx_info *info = NULL;
+ struct ieee80211_hdr *hdr = NULL;
+ u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
+ int i, sh, idx;
+ u16 seq;
+ if (agg->wait_for_ba)
+ D_TX_REPLY("got tx response w/o block-ack\n");
+
+ agg->frame_count = tx_resp->frame_count;
+ agg->start_idx = start_idx;
+ agg->rate_n_flags = rate_n_flags;
+ agg->bitmap = 0;
+
+ /* num frames attempted by Tx command */
+ if (agg->frame_count == 1) {
+ /* Only one frame was attempted; no block-ack will arrive */
+ status = le16_to_cpu(frame_status[0].status);
+ idx = start_idx;
+
+ D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
+ agg->frame_count, agg->start_idx, idx);
+
+ info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
+ info->status.rates[0].count = tx_resp->failure_frame + 1;
+ info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+ info->flags |= il4965_tx_status_to_mac80211(status);
+ il4965_hwrate_to_tx_control(il, rate_n_flags, info);
+
+ D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
+ tx_resp->failure_frame);
+ D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
+
+ agg->wait_for_ba = 0;
+ } else {
+ /* Two or more frames were attempted; expect block-ack */
+ u64 bitmap = 0;
+ int start = agg->start_idx;
+ struct sk_buff *skb;
+
+ /* Construct bit-map of pending frames within Tx win */
+ for (i = 0; i < agg->frame_count; i++) {
+ u16 sc;
+ status = le16_to_cpu(frame_status[i].status);
+ seq = le16_to_cpu(frame_status[i].sequence);
+ idx = SEQ_TO_IDX(seq);
+ txq_id = SEQ_TO_QUEUE(seq);
+
+ if (status &
+ (AGG_TX_STATE_FEW_BYTES_MSK |
+ AGG_TX_STATE_ABORT_MSK))
+ continue;
+
+ D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
+ agg->frame_count, txq_id, idx);
+
+ skb = il->txq[txq_id].skbs[idx];
+ if (WARN_ON_ONCE(skb == NULL))
+ return -1;
+ hdr = (struct ieee80211_hdr *) skb->data;
+
+ sc = le16_to_cpu(hdr->seq_ctrl);
+ if (idx != (SEQ_TO_SN(sc) & 0xff)) {
+ IL_ERR("BUG_ON idx doesn't match seq control"
+ " idx=%d, seq_idx=%d, seq=%d\n", idx,
+ SEQ_TO_SN(sc), hdr->seq_ctrl);
+ return -1;
+ }
+
+ D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
+ SEQ_TO_SN(sc));
+
+ sh = idx - start;
+ if (sh > 64) {
+ sh = (start - idx) + 0xff;
+ bitmap = bitmap << sh;
+ sh = 0;
+ start = idx;
+ } else if (sh < -64)
+ sh = 0xff - (start - idx);
+ else if (sh < 0) {
+ sh = start - idx;
+ start = idx;
+ bitmap = bitmap << sh;
+ sh = 0;
+ }
+ bitmap |= 1ULL << sh;
+ D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
+ (unsigned long long)bitmap);
+ }
+
+ agg->bitmap = bitmap;
+ agg->start_idx = start;
+ D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
+ agg->frame_count, agg->start_idx,
+ (unsigned long long)agg->bitmap);
+
+ if (bitmap)
+ agg->wait_for_ba = 1;
+ }
+ return 0;
+}
+
+/**
+ * il4965_hdl_tx - Handle standard (non-aggregation) Tx response
+ */
+static void
+il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
+{
+ struct il_rx_pkt *pkt = rxb_addr(rxb);
+ u16 sequence = le16_to_cpu(pkt->hdr.sequence);
+ int txq_id = SEQ_TO_QUEUE(sequence);
+ int idx = SEQ_TO_IDX(sequence);
+ struct il_tx_queue *txq = &il->txq[txq_id];
+ struct sk_buff *skb;
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_tx_info *info;
+ struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
+ u32 status = le32_to_cpu(tx_resp->u.status);
+ int uninitialized_var(tid);
+ int sta_id;
+ int freed;
+ u8 *qc = NULL;
+ unsigned long flags;
+
+ if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
+ IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
+ "is out of range [0-%d] %d %d\n", txq_id, idx,
+ txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
+ return;
+ }
+
+ txq->time_stamp = jiffies;
+
+ skb = txq->skbs[txq->q.read_ptr];
+ info = IEEE80211_SKB_CB(skb);
+ memset(&info->status, 0, sizeof(info->status));
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+ if (ieee80211_is_data_qos(hdr->frame_control)) {
+ qc = ieee80211_get_qos_ctl(hdr);
+ tid = qc[0] & 0xf;
+ }
+
+ sta_id = il4965_get_ra_sta_id(il, hdr);
+ if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
+ IL_ERR("Station not known\n");
+ return;
+ }
+
+ spin_lock_irqsave(&il->sta_lock, flags);
+ if (txq->sched_retry) {
+ const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
+ struct il_ht_agg *agg = NULL;
+ WARN_ON(!qc);
+
+ agg = &il->stations[sta_id].tid[tid].agg;
+
+ il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
+
+ /* check if BAR is needed */
+ if (tx_resp->frame_count == 1 &&
+ !il4965_is_tx_success(status))
+ info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
+
+ if (txq->q.read_ptr != (scd_ssn & 0xff)) {
+ idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
+ D_TX_REPLY("Retry scheduler reclaim scd_ssn "
+ "%d idx %d\n", scd_ssn, idx);
+ freed = il4965_tx_queue_reclaim(il, txq_id, idx);
+ if (qc)
+ il4965_free_tfds_in_queue(il, sta_id, tid,
+ freed);
+
+ if (il->mac80211_registered &&
+ il_queue_space(&txq->q) > txq->q.low_mark &&
+ agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
+ il_wake_queue(il, txq);
+ }
+ } else {
+ info->status.rates[0].count = tx_resp->failure_frame + 1;
+ info->flags |= il4965_tx_status_to_mac80211(status);
+ il4965_hwrate_to_tx_control(il,
+ le32_to_cpu(tx_resp->rate_n_flags),
+ info);
+
+ D_TX_REPLY("TXQ %d status %s (0x%08x) "
+ "rate_n_flags 0x%x retries %d\n", txq_id,
+ il4965_get_tx_fail_reason(status), status,
+ le32_to_cpu(tx_resp->rate_n_flags),
+ tx_resp->failure_frame);
+
+ freed = il4965_tx_queue_reclaim(il, txq_id, idx);
+ if (qc && likely(sta_id != IL_INVALID_STATION))
+ il4965_free_tfds_in_queue(il, sta_id, tid, freed);
+ else if (sta_id == IL_INVALID_STATION)
+ D_TX_REPLY("Station not known\n");
+
+ if (il->mac80211_registered &&
+ il_queue_space(&txq->q) > txq->q.low_mark)
+ il_wake_queue(il, txq);
+ }
+ if (qc && likely(sta_id != IL_INVALID_STATION))
+ il4965_txq_check_empty(il, sta_id, tid, txq_id);
+
+ il4965_check_abort_status(il, tx_resp->frame_count, status);
+
+ spin_unlock_irqrestore(&il->sta_lock, flags);
+}
+
/**
* translate ucode response to mac80211 tx status control values
*/
@@ -3868,10 +4170,11 @@
/* Rx handlers */
il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
il->handlers[N_RX_MPDU] = il4965_hdl_rx;
+ il->handlers[N_RX] = il4965_hdl_rx;
/* block ack */
il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
- /* Set up hardware specific Rx handlers */
- il->ops->lib->handler_setup(il);
+ /* Tx response */
+ il->handlers[C_TX] = il4965_hdl_tx;
}
/**