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/******************************************************************************
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include "iwl-helpers.h"
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#include "iwl-4965-hw.h"
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* mac80211 queues, ACs, hardware queues, FIFOs.
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* Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
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* Mac80211 uses the following numbers, which we get as from it
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* by way of skb_get_queue_mapping(skb):
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* Regular (not A-MPDU) frames are put into hardware queues corresponding
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* to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
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* own queue per aggregation session (RA/TID combination), such queues are
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* set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
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* order to map frames to the right queue, we also need an AC->hw queue
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* mapping. This is implemented here.
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* Due to the way hw queues are set up (by the hw specific modules like
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* iwl-4965.c), the AC->hw queue mapping is the identity
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static const u8 tid_to_ac[] = {
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static inline int iwl4965_get_ac_from_tid(u16 tid)
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if (likely(tid < ARRAY_SIZE(tid_to_ac)))
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return tid_to_ac[tid];
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/* no support for TIDs 8-15 yet */
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iwl4965_get_fifo_from_tid(struct iwl_rxon_context *ctx, u16 tid)
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if (likely(tid < ARRAY_SIZE(tid_to_ac)))
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return ctx->ac_to_fifo[tid_to_ac[tid]];
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/* no support for TIDs 8-15 yet */
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* handle build REPLY_TX command notification.
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static void iwl4965_tx_cmd_build_basic(struct iwl_priv *priv,
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struct iwl_tx_cmd *tx_cmd,
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struct ieee80211_tx_info *info,
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struct ieee80211_hdr *hdr,
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__le16 fc = hdr->frame_control;
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__le32 tx_flags = tx_cmd->tx_flags;
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tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
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if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
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tx_flags |= TX_CMD_FLG_ACK_MSK;
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if (ieee80211_is_mgmt(fc))
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tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
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if (ieee80211_is_probe_resp(fc) &&
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!(le16_to_cpu(hdr->seq_ctrl) & 0xf))
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tx_flags |= TX_CMD_FLG_TSF_MSK;
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tx_flags &= (~TX_CMD_FLG_ACK_MSK);
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tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
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if (ieee80211_is_back_req(fc))
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tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
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tx_cmd->sta_id = std_id;
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if (ieee80211_has_morefrags(fc))
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tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
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if (ieee80211_is_data_qos(fc)) {
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u8 *qc = ieee80211_get_qos_ctl(hdr);
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tx_cmd->tid_tspec = qc[0] & 0xf;
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tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
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tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
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iwl_legacy_tx_cmd_protection(priv, info, fc, &tx_flags);
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tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
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if (ieee80211_is_mgmt(fc)) {
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if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
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tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
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tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
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tx_cmd->timeout.pm_frame_timeout = 0;
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tx_cmd->driver_txop = 0;
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tx_cmd->tx_flags = tx_flags;
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tx_cmd->next_frame_len = 0;
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#define RTS_DFAULT_RETRY_LIMIT 60
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static void iwl4965_tx_cmd_build_rate(struct iwl_priv *priv,
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struct iwl_tx_cmd *tx_cmd,
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struct ieee80211_tx_info *info,
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/* Set retry limit on DATA packets and Probe Responses*/
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if (ieee80211_is_probe_resp(fc))
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data_retry_limit = 3;
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data_retry_limit = IWL4965_DEFAULT_TX_RETRY;
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tx_cmd->data_retry_limit = data_retry_limit;
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/* Set retry limit on RTS packets */
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rts_retry_limit = RTS_DFAULT_RETRY_LIMIT;
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if (data_retry_limit < rts_retry_limit)
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rts_retry_limit = data_retry_limit;
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tx_cmd->rts_retry_limit = rts_retry_limit;
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/* DATA packets will use the uCode station table for rate/antenna
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if (ieee80211_is_data(fc)) {
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tx_cmd->initial_rate_index = 0;
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tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
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* If the current TX rate stored in mac80211 has the MCS bit set, it's
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* not really a TX rate. Thus, we use the lowest supported rate for
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* this band. Also use the lowest supported rate if the stored rate
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rate_idx = info->control.rates[0].idx;
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if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
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(rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
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rate_idx = rate_lowest_index(&priv->bands[info->band],
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/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
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if (info->band == IEEE80211_BAND_5GHZ)
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rate_idx += IWL_FIRST_OFDM_RATE;
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/* Get PLCP rate for tx_cmd->rate_n_flags */
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rate_plcp = iwlegacy_rates[rate_idx].plcp;
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/* Zero out flags for this packet */
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/* Set CCK flag as needed */
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if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
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rate_flags |= RATE_MCS_CCK_MSK;
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/* Set up antennas */
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priv->mgmt_tx_ant = iwl4965_toggle_tx_ant(priv, priv->mgmt_tx_ant,
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priv->hw_params.valid_tx_ant);
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rate_flags |= iwl4965_ant_idx_to_flags(priv->mgmt_tx_ant);
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/* Set the rate in the TX cmd */
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tx_cmd->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
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static void iwl4965_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
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struct ieee80211_tx_info *info,
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struct iwl_tx_cmd *tx_cmd,
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struct sk_buff *skb_frag,
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struct ieee80211_key_conf *keyconf = info->control.hw_key;
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switch (keyconf->cipher) {
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case WLAN_CIPHER_SUITE_CCMP:
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tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
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memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
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if (info->flags & IEEE80211_TX_CTL_AMPDU)
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tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
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IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
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case WLAN_CIPHER_SUITE_TKIP:
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tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
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ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
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IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
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case WLAN_CIPHER_SUITE_WEP104:
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tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
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case WLAN_CIPHER_SUITE_WEP40:
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tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
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(keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
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memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
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IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
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"with key %d\n", keyconf->keyidx);
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IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
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* start REPLY_TX command process
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int iwl4965_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_sta *sta = info->control.sta;
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struct iwl_station_priv *sta_priv = NULL;
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struct iwl_tx_queue *txq;
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struct iwl_device_cmd *out_cmd;
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struct iwl_cmd_meta *out_meta;
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struct iwl_tx_cmd *tx_cmd;
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struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
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dma_addr_t phys_addr;
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dma_addr_t txcmd_phys;
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dma_addr_t scratch_phys;
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u16 len, firstlen, secondlen;
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u8 wait_write_ptr = 0;
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if (info->control.vif)
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ctx = iwl_legacy_rxon_ctx_from_vif(info->control.vif);
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spin_lock_irqsave(&priv->lock, flags);
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if (iwl_legacy_is_rfkill(priv)) {
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IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
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fc = hdr->frame_control;
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#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
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if (ieee80211_is_auth(fc))
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IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
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else if (ieee80211_is_assoc_req(fc))
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IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
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else if (ieee80211_is_reassoc_req(fc))
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IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
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hdr_len = ieee80211_hdrlen(fc);
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/* For management frames use broadcast id to do not break aggregation */
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if (!ieee80211_is_data(fc))
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sta_id = ctx->bcast_sta_id;
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/* Find index into station table for destination station */
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sta_id = iwl_legacy_sta_id_or_broadcast(priv, ctx, info->control.sta);
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if (sta_id == IWL_INVALID_STATION) {
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IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
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IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
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sta_priv = (void *)sta->drv_priv;
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if (sta_priv && sta_priv->asleep &&
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(info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
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* This sends an asynchronous command to the device,
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* but we can rely on it being processed before the
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* next frame is processed -- and the next frame to
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* this station is the one that will consume this
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* For now set the counter to just 1 since we do not
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iwl4965_sta_modify_sleep_tx_count(priv, sta_id, 1);
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* Send this frame after DTIM -- there's a special queue
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* reserved for this for contexts that support AP mode.
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if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
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txq_id = ctx->mcast_queue;
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* The microcode will clear the more data
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* bit in the last frame it transmits.
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hdr->frame_control |=
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cpu_to_le16(IEEE80211_FCTL_MOREDATA);
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txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
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/* irqs already disabled/saved above when locking priv->lock */
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spin_lock(&priv->sta_lock);
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if (ieee80211_is_data_qos(fc)) {
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qc = ieee80211_get_qos_ctl(hdr);
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tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
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if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
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spin_unlock(&priv->sta_lock);
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seq_number = priv->stations[sta_id].tid[tid].seq_number;
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seq_number &= IEEE80211_SCTL_SEQ;
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hdr->seq_ctrl = hdr->seq_ctrl &
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cpu_to_le16(IEEE80211_SCTL_FRAG);
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hdr->seq_ctrl |= cpu_to_le16(seq_number);
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/* aggregation is on for this <sta,tid> */
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if (info->flags & IEEE80211_TX_CTL_AMPDU &&
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priv->stations[sta_id].tid[tid].agg.state == IWL_AGG_ON) {
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txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
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txq = &priv->txq[txq_id];
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if (unlikely(iwl_legacy_queue_space(q) < q->high_mark)) {
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spin_unlock(&priv->sta_lock);
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if (ieee80211_is_data_qos(fc)) {
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priv->stations[sta_id].tid[tid].tfds_in_queue++;
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if (!ieee80211_has_morefrags(fc))
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priv->stations[sta_id].tid[tid].seq_number = seq_number;
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spin_unlock(&priv->sta_lock);
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/* Set up driver data for this TFD */
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memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
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txq->txb[q->write_ptr].skb = skb;
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txq->txb[q->write_ptr].ctx = ctx;
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/* Set up first empty entry in queue's array of Tx/cmd buffers */
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out_cmd = txq->cmd[q->write_ptr];
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out_meta = &txq->meta[q->write_ptr];
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tx_cmd = &out_cmd->cmd.tx;
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memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
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memset(tx_cmd, 0, sizeof(struct iwl_tx_cmd));
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* Set up the Tx-command (not MAC!) header.
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* Store the chosen Tx queue and TFD index within the sequence field;
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* after Tx, uCode's Tx response will return this value so driver can
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* locate the frame within the tx queue and do post-tx processing.
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out_cmd->hdr.cmd = REPLY_TX;
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out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
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INDEX_TO_SEQ(q->write_ptr)));
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/* Copy MAC header from skb into command buffer */
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memcpy(tx_cmd->hdr, hdr, hdr_len);
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/* Total # bytes to be transmitted */
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tx_cmd->len = cpu_to_le16(len);
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if (info->control.hw_key)
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iwl4965_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
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/* TODO need this for burst mode later on */
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iwl4965_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
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iwl_legacy_dbg_log_tx_data_frame(priv, len, hdr);
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iwl4965_tx_cmd_build_rate(priv, tx_cmd, info, fc);
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iwl_legacy_update_stats(priv, true, fc, len);
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* Use the first empty entry in this queue's command buffer array
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* to contain the Tx command and MAC header concatenated together
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* (payload data will be in another buffer).
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* Size of this varies, due to varying MAC header length.
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* If end is not dword aligned, we'll have 2 extra bytes at the end
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* of the MAC header (device reads on dword boundaries).
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* We'll tell device about this padding later.
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len = sizeof(struct iwl_tx_cmd) +
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sizeof(struct iwl_cmd_header) + hdr_len;
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firstlen = (len + 3) & ~3;
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/* Tell NIC about any 2-byte padding after MAC header */
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tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
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/* Physical address of this Tx command's header (not MAC header!),
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* within command buffer array. */
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txcmd_phys = pci_map_single(priv->pci_dev,
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&out_cmd->hdr, firstlen,
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PCI_DMA_BIDIRECTIONAL);
468
dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
469
dma_unmap_len_set(out_meta, len, firstlen);
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/* Add buffer containing Tx command and MAC(!) header to TFD's
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priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
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txcmd_phys, firstlen, 1, 0);
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if (!ieee80211_has_morefrags(hdr->frame_control)) {
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txq->need_update = 1;
479
txq->need_update = 0;
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/* Set up TFD's 2nd entry to point directly to remainder of skb,
483
* if any (802.11 null frames have no payload). */
484
secondlen = skb->len - hdr_len;
486
phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
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secondlen, PCI_DMA_TODEVICE);
488
priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
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phys_addr, secondlen,
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scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
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offsetof(struct iwl_tx_cmd, scratch);
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/* take back ownership of DMA buffer to enable update */
497
pci_dma_sync_single_for_cpu(priv->pci_dev, txcmd_phys,
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firstlen, PCI_DMA_BIDIRECTIONAL);
499
tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
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tx_cmd->dram_msb_ptr = iwl_legacy_get_dma_hi_addr(scratch_phys);
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IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
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le16_to_cpu(out_cmd->hdr.sequence));
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IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
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iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd));
506
iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len);
508
/* Set up entry for this TFD in Tx byte-count array */
509
if (info->flags & IEEE80211_TX_CTL_AMPDU)
510
priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq,
511
le16_to_cpu(tx_cmd->len));
513
pci_dma_sync_single_for_device(priv->pci_dev, txcmd_phys,
514
firstlen, PCI_DMA_BIDIRECTIONAL);
516
trace_iwlwifi_legacy_dev_tx(priv,
517
&((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr],
518
sizeof(struct iwl_tfd),
519
&out_cmd->hdr, firstlen,
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skb->data + hdr_len, secondlen);
522
/* Tell device the write index *just past* this latest filled TFD */
523
q->write_ptr = iwl_legacy_queue_inc_wrap(q->write_ptr, q->n_bd);
524
iwl_legacy_txq_update_write_ptr(priv, txq);
525
spin_unlock_irqrestore(&priv->lock, flags);
528
* At this point the frame is "transmitted" successfully
529
* and we will get a TX status notification eventually,
530
* regardless of the value of ret. "ret" only indicates
531
* whether or not we should update the write pointer.
535
* Avoid atomic ops if it isn't an associated client.
536
* Also, if this is a packet for aggregation, don't
537
* increase the counter because the ucode will stop
538
* aggregation queues when their respective station
541
if (sta_priv && sta_priv->client && !is_agg)
542
atomic_inc(&sta_priv->pending_frames);
544
if ((iwl_legacy_queue_space(q) < q->high_mark) &&
545
priv->mac80211_registered) {
546
if (wait_write_ptr) {
547
spin_lock_irqsave(&priv->lock, flags);
548
txq->need_update = 1;
549
iwl_legacy_txq_update_write_ptr(priv, txq);
550
spin_unlock_irqrestore(&priv->lock, flags);
552
iwl_legacy_stop_queue(priv, txq);
559
spin_unlock_irqrestore(&priv->lock, flags);
563
static inline int iwl4965_alloc_dma_ptr(struct iwl_priv *priv,
564
struct iwl_dma_ptr *ptr, size_t size)
566
ptr->addr = dma_alloc_coherent(&priv->pci_dev->dev, size, &ptr->dma,
574
static inline void iwl4965_free_dma_ptr(struct iwl_priv *priv,
575
struct iwl_dma_ptr *ptr)
577
if (unlikely(!ptr->addr))
580
dma_free_coherent(&priv->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
581
memset(ptr, 0, sizeof(*ptr));
585
* iwl4965_hw_txq_ctx_free - Free TXQ Context
587
* Destroy all TX DMA queues and structures
589
void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
595
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
596
if (txq_id == priv->cmd_queue)
597
iwl_legacy_cmd_queue_free(priv);
599
iwl_legacy_tx_queue_free(priv, txq_id);
601
iwl4965_free_dma_ptr(priv, &priv->kw);
603
iwl4965_free_dma_ptr(priv, &priv->scd_bc_tbls);
605
/* free tx queue structure */
606
iwl_legacy_txq_mem(priv);
610
* iwl4965_txq_ctx_alloc - allocate TX queue context
611
* Allocate all Tx DMA structures and initialize them
616
int iwl4965_txq_ctx_alloc(struct iwl_priv *priv)
619
int txq_id, slots_num;
622
/* Free all tx/cmd queues and keep-warm buffer */
623
iwl4965_hw_txq_ctx_free(priv);
625
ret = iwl4965_alloc_dma_ptr(priv, &priv->scd_bc_tbls,
626
priv->hw_params.scd_bc_tbls_size);
628
IWL_ERR(priv, "Scheduler BC Table allocation failed\n");
631
/* Alloc keep-warm buffer */
632
ret = iwl4965_alloc_dma_ptr(priv, &priv->kw, IWL_KW_SIZE);
634
IWL_ERR(priv, "Keep Warm allocation failed\n");
638
/* allocate tx queue structure */
639
ret = iwl_legacy_alloc_txq_mem(priv);
643
spin_lock_irqsave(&priv->lock, flags);
645
/* Turn off all Tx DMA fifos */
646
iwl4965_txq_set_sched(priv, 0);
648
/* Tell NIC where to find the "keep warm" buffer */
649
iwl_legacy_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4);
651
spin_unlock_irqrestore(&priv->lock, flags);
653
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
654
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
655
slots_num = (txq_id == priv->cmd_queue) ?
656
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
657
ret = iwl_legacy_tx_queue_init(priv,
658
&priv->txq[txq_id], slots_num,
661
IWL_ERR(priv, "Tx %d queue init failed\n", txq_id);
669
iwl4965_hw_txq_ctx_free(priv);
670
iwl4965_free_dma_ptr(priv, &priv->kw);
672
iwl4965_free_dma_ptr(priv, &priv->scd_bc_tbls);
677
void iwl4965_txq_ctx_reset(struct iwl_priv *priv)
679
int txq_id, slots_num;
682
spin_lock_irqsave(&priv->lock, flags);
684
/* Turn off all Tx DMA fifos */
685
iwl4965_txq_set_sched(priv, 0);
687
/* Tell NIC where to find the "keep warm" buffer */
688
iwl_legacy_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4);
690
spin_unlock_irqrestore(&priv->lock, flags);
692
/* Alloc and init all Tx queues, including the command queue (#4) */
693
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
694
slots_num = txq_id == priv->cmd_queue ?
695
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
696
iwl_legacy_tx_queue_reset(priv, &priv->txq[txq_id],
702
* iwl4965_txq_ctx_stop - Stop all Tx DMA channels
704
void iwl4965_txq_ctx_stop(struct iwl_priv *priv)
709
/* Turn off all Tx DMA fifos */
710
spin_lock_irqsave(&priv->lock, flags);
712
iwl4965_txq_set_sched(priv, 0);
714
/* Stop each Tx DMA channel, and wait for it to be idle */
715
for (ch = 0; ch < priv->hw_params.dma_chnl_num; ch++) {
716
iwl_legacy_write_direct32(priv,
717
FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
718
if (iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG,
719
FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
721
IWL_ERR(priv, "Failing on timeout while stopping"
722
" DMA channel %d [0x%08x]", ch,
723
iwl_legacy_read_direct32(priv,
724
FH_TSSR_TX_STATUS_REG));
726
spin_unlock_irqrestore(&priv->lock, flags);
731
/* Unmap DMA from host system and free skb's */
732
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
733
if (txq_id == priv->cmd_queue)
734
iwl_legacy_cmd_queue_unmap(priv);
736
iwl_legacy_tx_queue_unmap(priv, txq_id);
740
* Find first available (lowest unused) Tx Queue, mark it "active".
741
* Called only when finding queue for aggregation.
742
* Should never return anything < 7, because they should already
743
* be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
745
static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
749
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
750
if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
756
* iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
758
static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
761
/* Simply stop the queue, but don't change any configuration;
762
* the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
763
iwl_legacy_write_prph(priv,
764
IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
765
(0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
766
(1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
770
* iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
772
static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
779
scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
781
tbl_dw_addr = priv->scd_base_addr +
782
IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
784
tbl_dw = iwl_legacy_read_targ_mem(priv, tbl_dw_addr);
787
tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
789
tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
791
iwl_legacy_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
797
* iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
799
* NOTE: txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
800
* i.e. it must be one of the higher queues used for aggregation
802
static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
803
int tx_fifo, int sta_id, int tid, u16 ssn_idx)
809
if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
810
(IWL49_FIRST_AMPDU_QUEUE +
811
priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
813
"queue number out of range: %d, must be %d to %d\n",
814
txq_id, IWL49_FIRST_AMPDU_QUEUE,
815
IWL49_FIRST_AMPDU_QUEUE +
816
priv->cfg->base_params->num_of_ampdu_queues - 1);
820
ra_tid = BUILD_RAxTID(sta_id, tid);
822
/* Modify device's station table to Tx this TID */
823
ret = iwl4965_sta_tx_modify_enable_tid(priv, sta_id, tid);
827
spin_lock_irqsave(&priv->lock, flags);
829
/* Stop this Tx queue before configuring it */
830
iwl4965_tx_queue_stop_scheduler(priv, txq_id);
832
/* Map receiver-address / traffic-ID to this queue */
833
iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
835
/* Set this queue as a chain-building queue */
836
iwl_legacy_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
838
/* Place first TFD at index corresponding to start sequence number.
839
* Assumes that ssn_idx is valid (!= 0xFFF) */
840
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
841
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
842
iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
844
/* Set up Tx window size and frame limit for this queue */
845
iwl_legacy_write_targ_mem(priv,
846
priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
847
(SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
848
IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
850
iwl_legacy_write_targ_mem(priv, priv->scd_base_addr +
851
IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
852
(SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
853
& IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
855
iwl_legacy_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
857
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
858
iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
860
spin_unlock_irqrestore(&priv->lock, flags);
866
int iwl4965_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
867
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
874
struct iwl_tid_data *tid_data;
876
tx_fifo = iwl4965_get_fifo_from_tid(iwl_legacy_rxon_ctx_from_vif(vif), tid);
877
if (unlikely(tx_fifo < 0))
880
IWL_WARN(priv, "%s on ra = %pM tid = %d\n",
881
__func__, sta->addr, tid);
883
sta_id = iwl_legacy_sta_id(sta);
884
if (sta_id == IWL_INVALID_STATION) {
885
IWL_ERR(priv, "Start AGG on invalid station\n");
888
if (unlikely(tid >= MAX_TID_COUNT))
891
if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
892
IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
896
txq_id = iwl4965_txq_ctx_activate_free(priv);
898
IWL_ERR(priv, "No free aggregation queue available\n");
902
spin_lock_irqsave(&priv->sta_lock, flags);
903
tid_data = &priv->stations[sta_id].tid[tid];
904
*ssn = SEQ_TO_SN(tid_data->seq_number);
905
tid_data->agg.txq_id = txq_id;
906
iwl_legacy_set_swq_id(&priv->txq[txq_id],
907
iwl4965_get_ac_from_tid(tid), txq_id);
908
spin_unlock_irqrestore(&priv->sta_lock, flags);
910
ret = iwl4965_txq_agg_enable(priv, txq_id, tx_fifo,
915
spin_lock_irqsave(&priv->sta_lock, flags);
916
tid_data = &priv->stations[sta_id].tid[tid];
917
if (tid_data->tfds_in_queue == 0) {
918
IWL_DEBUG_HT(priv, "HW queue is empty\n");
919
tid_data->agg.state = IWL_AGG_ON;
920
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
923
"HW queue is NOT empty: %d packets in HW queue\n",
924
tid_data->tfds_in_queue);
925
tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
927
spin_unlock_irqrestore(&priv->sta_lock, flags);
932
* txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
933
* priv->lock must be held by the caller
935
static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
936
u16 ssn_idx, u8 tx_fifo)
938
if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
939
(IWL49_FIRST_AMPDU_QUEUE +
940
priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
942
"queue number out of range: %d, must be %d to %d\n",
943
txq_id, IWL49_FIRST_AMPDU_QUEUE,
944
IWL49_FIRST_AMPDU_QUEUE +
945
priv->cfg->base_params->num_of_ampdu_queues - 1);
949
iwl4965_tx_queue_stop_scheduler(priv, txq_id);
951
iwl_legacy_clear_bits_prph(priv,
952
IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
954
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
955
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
956
/* supposes that ssn_idx is valid (!= 0xFFF) */
957
iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
959
iwl_legacy_clear_bits_prph(priv,
960
IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
961
iwl_txq_ctx_deactivate(priv, txq_id);
962
iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
967
int iwl4965_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
968
struct ieee80211_sta *sta, u16 tid)
970
int tx_fifo_id, txq_id, sta_id, ssn;
971
struct iwl_tid_data *tid_data;
972
int write_ptr, read_ptr;
975
tx_fifo_id = iwl4965_get_fifo_from_tid(iwl_legacy_rxon_ctx_from_vif(vif), tid);
976
if (unlikely(tx_fifo_id < 0))
979
sta_id = iwl_legacy_sta_id(sta);
981
if (sta_id == IWL_INVALID_STATION) {
982
IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
986
spin_lock_irqsave(&priv->sta_lock, flags);
988
tid_data = &priv->stations[sta_id].tid[tid];
989
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
990
txq_id = tid_data->agg.txq_id;
992
switch (priv->stations[sta_id].tid[tid].agg.state) {
993
case IWL_EMPTYING_HW_QUEUE_ADDBA:
995
* This can happen if the peer stops aggregation
996
* again before we've had a chance to drain the
997
* queue we selected previously, i.e. before the
998
* session was really started completely.
1000
IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
1005
IWL_WARN(priv, "Stopping AGG while state not ON or starting\n");
1008
write_ptr = priv->txq[txq_id].q.write_ptr;
1009
read_ptr = priv->txq[txq_id].q.read_ptr;
1011
/* The queue is not empty */
1012
if (write_ptr != read_ptr) {
1013
IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n");
1014
priv->stations[sta_id].tid[tid].agg.state =
1015
IWL_EMPTYING_HW_QUEUE_DELBA;
1016
spin_unlock_irqrestore(&priv->sta_lock, flags);
1020
IWL_DEBUG_HT(priv, "HW queue is empty\n");
1022
priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
1024
/* do not restore/save irqs */
1025
spin_unlock(&priv->sta_lock);
1026
spin_lock(&priv->lock);
1029
* the only reason this call can fail is queue number out of range,
1030
* which can happen if uCode is reloaded and all the station
1031
* information are lost. if it is outside the range, there is no need
1032
* to deactivate the uCode queue, just return "success" to allow
1033
* mac80211 to clean up it own data.
1035
iwl4965_txq_agg_disable(priv, txq_id, ssn, tx_fifo_id);
1036
spin_unlock_irqrestore(&priv->lock, flags);
1038
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1043
int iwl4965_txq_check_empty(struct iwl_priv *priv,
1044
int sta_id, u8 tid, int txq_id)
1046
struct iwl_queue *q = &priv->txq[txq_id].q;
1047
u8 *addr = priv->stations[sta_id].sta.sta.addr;
1048
struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
1049
struct iwl_rxon_context *ctx;
1051
ctx = &priv->contexts[priv->stations[sta_id].ctxid];
1053
lockdep_assert_held(&priv->sta_lock);
1055
switch (priv->stations[sta_id].tid[tid].agg.state) {
1056
case IWL_EMPTYING_HW_QUEUE_DELBA:
1057
/* We are reclaiming the last packet of the */
1058
/* aggregated HW queue */
1059
if ((txq_id == tid_data->agg.txq_id) &&
1060
(q->read_ptr == q->write_ptr)) {
1061
u16 ssn = SEQ_TO_SN(tid_data->seq_number);
1062
int tx_fifo = iwl4965_get_fifo_from_tid(ctx, tid);
1064
"HW queue empty: continue DELBA flow\n");
1065
iwl4965_txq_agg_disable(priv, txq_id, ssn, tx_fifo);
1066
tid_data->agg.state = IWL_AGG_OFF;
1067
ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
1070
case IWL_EMPTYING_HW_QUEUE_ADDBA:
1071
/* We are reclaiming the last packet of the queue */
1072
if (tid_data->tfds_in_queue == 0) {
1074
"HW queue empty: continue ADDBA flow\n");
1075
tid_data->agg.state = IWL_AGG_ON;
1076
ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
1084
static void iwl4965_non_agg_tx_status(struct iwl_priv *priv,
1085
struct iwl_rxon_context *ctx,
1088
struct ieee80211_sta *sta;
1089
struct iwl_station_priv *sta_priv;
1092
sta = ieee80211_find_sta(ctx->vif, addr1);
1094
sta_priv = (void *)sta->drv_priv;
1095
/* avoid atomic ops if this isn't a client */
1096
if (sta_priv->client &&
1097
atomic_dec_return(&sta_priv->pending_frames) == 0)
1098
ieee80211_sta_block_awake(priv->hw, sta, false);
1104
iwl4965_tx_status(struct iwl_priv *priv, struct iwl_tx_info *tx_info,
1107
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx_info->skb->data;
1110
iwl4965_non_agg_tx_status(priv, tx_info->ctx, hdr->addr1);
1112
ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb);
1115
int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
1117
struct iwl_tx_queue *txq = &priv->txq[txq_id];
1118
struct iwl_queue *q = &txq->q;
1119
struct iwl_tx_info *tx_info;
1121
struct ieee80211_hdr *hdr;
1123
if ((index >= q->n_bd) || (iwl_legacy_queue_used(q, index) == 0)) {
1124
IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, "
1125
"is out of range [0-%d] %d %d.\n", txq_id,
1126
index, q->n_bd, q->write_ptr, q->read_ptr);
1130
for (index = iwl_legacy_queue_inc_wrap(index, q->n_bd);
1131
q->read_ptr != index;
1132
q->read_ptr = iwl_legacy_queue_inc_wrap(q->read_ptr, q->n_bd)) {
1134
tx_info = &txq->txb[txq->q.read_ptr];
1136
if (WARN_ON_ONCE(tx_info->skb == NULL))
1139
hdr = (struct ieee80211_hdr *)tx_info->skb->data;
1140
if (ieee80211_is_data_qos(hdr->frame_control))
1143
iwl4965_tx_status(priv, tx_info,
1144
txq_id >= IWL4965_FIRST_AMPDU_QUEUE);
1145
tx_info->skb = NULL;
1147
priv->cfg->ops->lib->txq_free_tfd(priv, txq);
1153
* iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
1155
* Go through block-ack's bitmap of ACK'd frames, update driver's record of
1156
* ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
1158
static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
1159
struct iwl_ht_agg *agg,
1160
struct iwl_compressed_ba_resp *ba_resp)
1164
u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
1165
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1167
struct ieee80211_tx_info *info;
1168
u64 bitmap, sent_bitmap;
1170
if (unlikely(!agg->wait_for_ba)) {
1171
if (unlikely(ba_resp->bitmap))
1172
IWL_ERR(priv, "Received BA when not expected\n");
1176
/* Mark that the expected block-ack response arrived */
1177
agg->wait_for_ba = 0;
1178
IWL_DEBUG_TX_REPLY(priv, "BA %d %d\n", agg->start_idx,
1181
/* Calculate shift to align block-ack bits with our Tx window bits */
1182
sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl >> 4);
1183
if (sh < 0) /* tbw something is wrong with indices */
1186
if (agg->frame_count > (64 - sh)) {
1187
IWL_DEBUG_TX_REPLY(priv, "more frames than bitmap size");
1191
/* don't use 64-bit values for now */
1192
bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
1194
/* check for success or failure according to the
1195
* transmitted bitmap and block-ack bitmap */
1196
sent_bitmap = bitmap & agg->bitmap;
1198
/* For each frame attempted in aggregation,
1199
* update driver's record of tx frame's status. */
1201
while (sent_bitmap) {
1202
ack = sent_bitmap & 1ULL;
1204
IWL_DEBUG_TX_REPLY(priv, "%s ON i=%d idx=%d raw=%d\n",
1205
ack ? "ACK" : "NACK", i,
1206
(agg->start_idx + i) & 0xff,
1207
agg->start_idx + i);
1212
IWL_DEBUG_TX_REPLY(priv, "Bitmap %llx\n",
1213
(unsigned long long)bitmap);
1215
info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb);
1216
memset(&info->status, 0, sizeof(info->status));
1217
info->flags |= IEEE80211_TX_STAT_ACK;
1218
info->flags |= IEEE80211_TX_STAT_AMPDU;
1219
info->status.ampdu_ack_len = successes;
1220
info->status.ampdu_len = agg->frame_count;
1221
iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags, info);
1227
* translate ucode response to mac80211 tx status control values
1229
void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
1230
struct ieee80211_tx_info *info)
1232
struct ieee80211_tx_rate *r = &info->control.rates[0];
1234
info->antenna_sel_tx =
1235
((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1236
if (rate_n_flags & RATE_MCS_HT_MSK)
1237
r->flags |= IEEE80211_TX_RC_MCS;
1238
if (rate_n_flags & RATE_MCS_GF_MSK)
1239
r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1240
if (rate_n_flags & RATE_MCS_HT40_MSK)
1241
r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1242
if (rate_n_flags & RATE_MCS_DUP_MSK)
1243
r->flags |= IEEE80211_TX_RC_DUP_DATA;
1244
if (rate_n_flags & RATE_MCS_SGI_MSK)
1245
r->flags |= IEEE80211_TX_RC_SHORT_GI;
1246
r->idx = iwl4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
1250
* iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1252
* Handles block-acknowledge notification from device, which reports success
1253
* of frames sent via aggregation.
1255
void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
1256
struct iwl_rx_mem_buffer *rxb)
1258
struct iwl_rx_packet *pkt = rxb_addr(rxb);
1259
struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1260
struct iwl_tx_queue *txq = NULL;
1261
struct iwl_ht_agg *agg;
1265
unsigned long flags;
1267
/* "flow" corresponds to Tx queue */
1268
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1270
/* "ssn" is start of block-ack Tx window, corresponds to index
1271
* (in Tx queue's circular buffer) of first TFD/frame in window */
1272
u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1274
if (scd_flow >= priv->hw_params.max_txq_num) {
1276
"BUG_ON scd_flow is bigger than number of queues\n");
1280
txq = &priv->txq[scd_flow];
1281
sta_id = ba_resp->sta_id;
1283
agg = &priv->stations[sta_id].tid[tid].agg;
1284
if (unlikely(agg->txq_id != scd_flow)) {
1286
* FIXME: this is a uCode bug which need to be addressed,
1287
* log the information and return for now!
1288
* since it is possible happen very often and in order
1289
* not to fill the syslog, don't enable the logging by default
1291
IWL_DEBUG_TX_REPLY(priv,
1292
"BA scd_flow %d does not match txq_id %d\n",
1293
scd_flow, agg->txq_id);
1297
/* Find index just before block-ack window */
1298
index = iwl_legacy_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
1300
spin_lock_irqsave(&priv->sta_lock, flags);
1302
IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1305
(u8 *) &ba_resp->sta_addr_lo32,
1307
IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx,"
1309
"%d, scd_ssn = %d\n",
1312
(unsigned long long)le64_to_cpu(ba_resp->bitmap),
1315
IWL_DEBUG_TX_REPLY(priv, "DAT start_idx = %d, bitmap = 0x%llx\n",
1317
(unsigned long long)agg->bitmap);
1319
/* Update driver's record of ACK vs. not for each frame in window */
1320
iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
1322
/* Release all TFDs before the SSN, i.e. all TFDs in front of
1323
* block-ack window (we assume that they've been successfully
1324
* transmitted ... if not, it's too late anyway). */
1325
if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
1326
/* calculate mac80211 ampdu sw queue to wake */
1327
int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
1328
iwl4965_free_tfds_in_queue(priv, sta_id, tid, freed);
1330
if ((iwl_legacy_queue_space(&txq->q) > txq->q.low_mark) &&
1331
priv->mac80211_registered &&
1332
(agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
1333
iwl_legacy_wake_queue(priv, txq);
1335
iwl4965_txq_check_empty(priv, sta_id, tid, scd_flow);
1338
spin_unlock_irqrestore(&priv->sta_lock, flags);
1341
#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1342
const char *iwl4965_get_tx_fail_reason(u32 status)
1344
#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1345
#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1347
switch (status & TX_STATUS_MSK) {
1348
case TX_STATUS_SUCCESS:
1350
TX_STATUS_POSTPONE(DELAY);
1351
TX_STATUS_POSTPONE(FEW_BYTES);
1352
TX_STATUS_POSTPONE(QUIET_PERIOD);
1353
TX_STATUS_POSTPONE(CALC_TTAK);
1354
TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1355
TX_STATUS_FAIL(SHORT_LIMIT);
1356
TX_STATUS_FAIL(LONG_LIMIT);
1357
TX_STATUS_FAIL(FIFO_UNDERRUN);
1358
TX_STATUS_FAIL(DRAIN_FLOW);
1359
TX_STATUS_FAIL(RFKILL_FLUSH);
1360
TX_STATUS_FAIL(LIFE_EXPIRE);
1361
TX_STATUS_FAIL(DEST_PS);
1362
TX_STATUS_FAIL(HOST_ABORTED);
1363
TX_STATUS_FAIL(BT_RETRY);
1364
TX_STATUS_FAIL(STA_INVALID);
1365
TX_STATUS_FAIL(FRAG_DROPPED);
1366
TX_STATUS_FAIL(TID_DISABLE);
1367
TX_STATUS_FAIL(FIFO_FLUSHED);
1368
TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
1369
TX_STATUS_FAIL(PASSIVE_NO_RX);
1370
TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
1375
#undef TX_STATUS_FAIL
1376
#undef TX_STATUS_POSTPONE
1378
#endif /* CONFIG_IWLWIFI_LEGACY_DEBUG */