diff options
Diffstat (limited to 'drivers/net/wireless/iwlegacy/iwl-4965-tx.c')
| -rw-r--r-- | drivers/net/wireless/iwlegacy/iwl-4965-tx.c | 1378 |
1 files changed, 0 insertions, 1378 deletions
diff --git a/drivers/net/wireless/iwlegacy/iwl-4965-tx.c b/drivers/net/wireless/iwlegacy/iwl-4965-tx.c deleted file mode 100644 index 7f12e36..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-4965-tx.c +++ /dev/null @@ -1,1378 +0,0 @@ -/****************************************************************************** - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/sched.h> - -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" -#include "iwl-io.h" -#include "iwl-helpers.h" -#include "iwl-4965-hw.h" -#include "iwl-4965.h" - -/* - * mac80211 queues, ACs, hardware queues, FIFOs. - * - * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues - * - * Mac80211 uses the following numbers, which we get as from it - * by way of skb_get_queue_mapping(skb): - * - * VO 0 - * VI 1 - * BE 2 - * BK 3 - * - * - * Regular (not A-MPDU) frames are put into hardware queues corresponding - * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their - * own queue per aggregation session (RA/TID combination), such queues are - * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In - * order to map frames to the right queue, we also need an AC->hw queue - * mapping. This is implemented here. - * - * Due to the way hw queues are set up (by the hw specific modules like - * iwl-4965.c), the AC->hw queue mapping is the identity - * mapping. - */ - -static const u8 tid_to_ac[] = { - IEEE80211_AC_BE, - IEEE80211_AC_BK, - IEEE80211_AC_BK, - IEEE80211_AC_BE, - IEEE80211_AC_VI, - IEEE80211_AC_VI, - IEEE80211_AC_VO, - IEEE80211_AC_VO -}; - -static inline int iwl4965_get_ac_from_tid(u16 tid) -{ - if (likely(tid < ARRAY_SIZE(tid_to_ac))) - return tid_to_ac[tid]; - - /* no support for TIDs 8-15 yet */ - return -EINVAL; -} - -static inline int -iwl4965_get_fifo_from_tid(struct iwl_rxon_context *ctx, u16 tid) -{ - if (likely(tid < ARRAY_SIZE(tid_to_ac))) - return ctx->ac_to_fifo[tid_to_ac[tid]]; - - /* no support for TIDs 8-15 yet */ - return -EINVAL; -} - -/* - * handle build REPLY_TX command notification. - */ -static void iwl4965_tx_cmd_build_basic(struct iwl_priv *priv, - struct sk_buff *skb, - struct iwl_tx_cmd *tx_cmd, - struct ieee80211_tx_info *info, - struct ieee80211_hdr *hdr, - u8 std_id) -{ - __le16 fc = hdr->frame_control; - __le32 tx_flags = tx_cmd->tx_flags; - - tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; - if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { - tx_flags |= TX_CMD_FLG_ACK_MSK; - if (ieee80211_is_mgmt(fc)) - tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; - if (ieee80211_is_probe_resp(fc) && - !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) - tx_flags |= TX_CMD_FLG_TSF_MSK; - } else { - tx_flags &= (~TX_CMD_FLG_ACK_MSK); - tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; - } - - if (ieee80211_is_back_req(fc)) - tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; - - tx_cmd->sta_id = std_id; - if (ieee80211_has_morefrags(fc)) - tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; - - if (ieee80211_is_data_qos(fc)) { - u8 *qc = ieee80211_get_qos_ctl(hdr); - tx_cmd->tid_tspec = qc[0] & 0xf; - tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; - } else { - tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; - } - - iwl_legacy_tx_cmd_protection(priv, info, fc, &tx_flags); - - tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); - if (ieee80211_is_mgmt(fc)) { - if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) - tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); - else - tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); - } else { - tx_cmd->timeout.pm_frame_timeout = 0; - } - - tx_cmd->driver_txop = 0; - tx_cmd->tx_flags = tx_flags; - tx_cmd->next_frame_len = 0; -} - -#define RTS_DFAULT_RETRY_LIMIT 60 - -static void iwl4965_tx_cmd_build_rate(struct iwl_priv *priv, - struct iwl_tx_cmd *tx_cmd, - struct ieee80211_tx_info *info, - __le16 fc) -{ - u32 rate_flags; - int rate_idx; - u8 rts_retry_limit; - u8 data_retry_limit; - u8 rate_plcp; - - /* Set retry limit on DATA packets and Probe Responses*/ - if (ieee80211_is_probe_resp(fc)) - data_retry_limit = 3; - else - data_retry_limit = IWL4965_DEFAULT_TX_RETRY; - tx_cmd->data_retry_limit = data_retry_limit; - - /* Set retry limit on RTS packets */ - rts_retry_limit = RTS_DFAULT_RETRY_LIMIT; - if (data_retry_limit < rts_retry_limit) - rts_retry_limit = data_retry_limit; - tx_cmd->rts_retry_limit = rts_retry_limit; - - /* DATA packets will use the uCode station table for rate/antenna - * selection */ - if (ieee80211_is_data(fc)) { - tx_cmd->initial_rate_index = 0; - tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; - return; - } - - /** - * If the current TX rate stored in mac80211 has the MCS bit set, it's - * not really a TX rate. Thus, we use the lowest supported rate for - * this band. Also use the lowest supported rate if the stored rate - * index is invalid. - */ - rate_idx = info->control.rates[0].idx; - if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || - (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) - rate_idx = rate_lowest_index(&priv->bands[info->band], - info->control.sta); - /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ - if (info->band == IEEE80211_BAND_5GHZ) - rate_idx += IWL_FIRST_OFDM_RATE; - /* Get PLCP rate for tx_cmd->rate_n_flags */ - rate_plcp = iwlegacy_rates[rate_idx].plcp; - /* Zero out flags for this packet */ - rate_flags = 0; - - /* Set CCK flag as needed */ - if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) - rate_flags |= RATE_MCS_CCK_MSK; - - /* Set up antennas */ - priv->mgmt_tx_ant = iwl4965_toggle_tx_ant(priv, priv->mgmt_tx_ant, - priv->hw_params.valid_tx_ant); - - rate_flags |= iwl4965_ant_idx_to_flags(priv->mgmt_tx_ant); - - /* Set the rate in the TX cmd */ - tx_cmd->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags); -} - -static void iwl4965_tx_cmd_build_hwcrypto(struct iwl_priv *priv, - struct ieee80211_tx_info *info, - struct iwl_tx_cmd *tx_cmd, - struct sk_buff *skb_frag, - int sta_id) -{ - struct ieee80211_key_conf *keyconf = info->control.hw_key; - - switch (keyconf->cipher) { - case WLAN_CIPHER_SUITE_CCMP: - tx_cmd->sec_ctl = TX_CMD_SEC_CCM; - memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); - if (info->flags & IEEE80211_TX_CTL_AMPDU) - tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; - IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); - break; - - case WLAN_CIPHER_SUITE_TKIP: - tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; - ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); - IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); - break; - - case WLAN_CIPHER_SUITE_WEP104: - tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; - /* fall through */ - case WLAN_CIPHER_SUITE_WEP40: - tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | - (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); - - memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); - - IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " - "with key %d\n", keyconf->keyidx); - break; - - default: - IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); - break; - } -} - -/* - * start REPLY_TX command process - */ -int iwl4965_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; - struct iwl_cmd_meta *out_meta; - struct iwl_tx_cmd *tx_cmd; - struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; - int txq_id; - dma_addr_t phys_addr; - dma_addr_t txcmd_phys; - dma_addr_t scratch_phys; - u16 len, firstlen, secondlen; - u16 seq_number = 0; - __le16 fc; - u8 hdr_len; - u8 sta_id; - u8 wait_write_ptr = 0; - u8 tid = 0; - u8 *qc = NULL; - unsigned long flags; - bool is_agg = false; - - if (info->control.vif) - ctx = iwl_legacy_rxon_ctx_from_vif(info->control.vif); - - spin_lock_irqsave(&priv->lock, flags); - if (iwl_legacy_is_rfkill(priv)) { - IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); - goto drop_unlock; - } - - fc = hdr->frame_control; - -#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG - if (ieee80211_is_auth(fc)) - IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); - else if (ieee80211_is_assoc_req(fc)) - IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); - else if (ieee80211_is_reassoc_req(fc)) - IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); -#endif - - hdr_len = ieee80211_hdrlen(fc); - - /* For management frames use broadcast id to do not break aggregation */ - if (!ieee80211_is_data(fc)) - sta_id = ctx->bcast_sta_id; - else { - /* Find index into station table for destination station */ - sta_id = iwl_legacy_sta_id_or_broadcast(priv, ctx, info->control.sta); - - if (sta_id == IWL_INVALID_STATION) { - IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", - hdr->addr1); - goto drop_unlock; - } - } - - IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); - - if (sta) - sta_priv = (void *)sta->drv_priv; - - if (sta_priv && sta_priv->asleep && - (info->flags & IEEE80211_TX_CTL_POLL_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. - */ - iwl4965_sta_modify_sleep_tx_count(priv, sta_id, 1); - } - - /* - * Send this frame after DTIM -- there's a special queue - * reserved for this for contexts that support AP mode. - */ - if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { - txq_id = ctx->mcast_queue; - /* - * The microcode will clear the more data - * bit in the last frame it transmits. - */ - hdr->frame_control |= - cpu_to_le16(IEEE80211_FCTL_MOREDATA); - } else - txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)]; - - /* irqs already disabled/saved above when locking priv->lock */ - spin_lock(&priv->sta_lock); - - if (ieee80211_is_data_qos(fc)) { - qc = ieee80211_get_qos_ctl(hdr); - tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; - if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) { - spin_unlock(&priv->sta_lock); - goto drop_unlock; - } - seq_number = priv->stations[sta_id].tid[tid].seq_number; - seq_number &= IEEE80211_SCTL_SEQ; - hdr->seq_ctrl = hdr->seq_ctrl & - cpu_to_le16(IEEE80211_SCTL_FRAG); - hdr->seq_ctrl |= cpu_to_le16(seq_number); - seq_number += 0x10; - /* aggregation is on for this <sta,tid> */ - if (info->flags & IEEE80211_TX_CTL_AMPDU && - priv->stations[sta_id].tid[tid].agg.state == IWL_AGG_ON) { - txq_id = priv->stations[sta_id].tid[tid].agg.txq_id; - is_agg = true; - } - } - - txq = &priv->txq[txq_id]; - q = &txq->q; - - if (unlikely(iwl_legacy_queue_space(q) < q->high_mark)) { - spin_unlock(&priv->sta_lock); - goto drop_unlock; - } - - if (ieee80211_is_data_qos(fc)) { - priv->stations[sta_id].tid[tid].tfds_in_queue++; - if (!ieee80211_has_morefrags(fc)) - priv->stations[sta_id].tid[tid].seq_number = seq_number; - } - - spin_unlock(&priv->sta_lock); - - /* Set up driver data for this TFD */ - memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); - txq->txb[q->write_ptr].skb = skb; - txq->txb[q->write_ptr].ctx = ctx; - - /* Set up first empty entry in queue's array of Tx/cmd buffers */ - out_cmd = txq->cmd[q->write_ptr]; - out_meta = &txq->meta[q->write_ptr]; - tx_cmd = &out_cmd->cmd.tx; - memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); - memset(tx_cmd, 0, sizeof(struct iwl_tx_cmd)); - - /* - * Set up the Tx-command (not MAC!) header. - * Store the chosen Tx queue and TFD index within the sequence field; - * after Tx, uCode's Tx response will return this value so driver can - * locate the frame within the tx queue and do post-tx processing. - */ - out_cmd->hdr.cmd = REPLY_TX; - out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | - INDEX_TO_SEQ(q->write_ptr))); - - /* Copy MAC header from skb into command buffer */ - memcpy(tx_cmd->hdr, hdr, hdr_len); - - - /* Total # bytes to be transmitted */ - len = (u16)skb->len; - tx_cmd->len = cpu_to_le16(len); - - if (info->control.hw_key) - iwl4965_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id); - - /* TODO need this for burst mode later on */ - iwl4965_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); - iwl_legacy_dbg_log_tx_data_frame(priv, len, hdr); - - iwl4965_tx_cmd_build_rate(priv, tx_cmd, info, fc); - - iwl_legacy_update_stats(priv, true, fc, len); - /* - * Use the first empty entry in this queue's command buffer array - * to contain the Tx command and MAC header concatenated together - * (payload data will be in another buffer). - * Size of this varies, due to varying MAC header length. - * If end is not dword aligned, we'll have 2 extra bytes at the end - * of the MAC header (device reads on dword boundaries). - * We'll tell device about this padding later. - */ - len = sizeof(struct iwl_tx_cmd) + - sizeof(struct iwl_cmd_header) + hdr_len; - firstlen = (len + 3) & ~3; - - /* Tell NIC about any 2-byte padding after MAC header */ - if (firstlen != len) - tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; - - /* Physical address of this Tx command's header (not MAC header!), - * within command buffer array. */ - txcmd_phys = pci_map_single(priv->pci_dev, - &out_cmd->hdr, firstlen, - PCI_DMA_BIDIRECTIONAL); - dma_unmap_addr_set(out_meta, mapping, txcmd_phys); - dma_unmap_len_set(out_meta, len, firstlen); - /* Add buffer containing Tx command and MAC(!) header to TFD's - * first entry */ - priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, - txcmd_phys, firstlen, 1, 0); - - if (!ieee80211_has_morefrags(hdr->frame_control)) { - txq->need_update = 1; - } else { - wait_write_ptr = 1; - txq->need_update = 0; - } - - /* Set up TFD's 2nd entry to point directly to remainder of skb, - * if any (802.11 null frames have no payload). */ - secondlen = skb->len - hdr_len; - if (secondlen > 0) { - phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len, - secondlen, PCI_DMA_TODEVICE); - priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, - phys_addr, secondlen, - 0, 0); - } - - scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + - offsetof(struct iwl_tx_cmd, scratch); - - /* take back ownership of DMA buffer to enable update */ - pci_dma_sync_single_for_cpu(priv->pci_dev, txcmd_phys, - firstlen, PCI_DMA_BIDIRECTIONAL); - tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); - tx_cmd->dram_msb_ptr = iwl_legacy_get_dma_hi_addr(scratch_phys); - - IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n", - le16_to_cpu(out_cmd->hdr.sequence)); - IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len); - - /* Set up entry for this TFD in Tx byte-count array */ - if (info->flags & IEEE80211_TX_CTL_AMPDU) - priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, - le16_to_cpu(tx_cmd->len)); - - pci_dma_sync_single_for_device(priv->pci_dev, txcmd_phys, - firstlen, PCI_DMA_BIDIRECTIONAL); - - trace_iwlwifi_legacy_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_legacy_queue_inc_wrap(q->write_ptr, q->n_bd); - iwl_legacy_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. - * Also, if this is a packet for aggregation, don't - * increase the counter because the ucode will stop - * aggregation queues when their respective station - * goes to sleep. - */ - if (sta_priv && sta_priv->client && !is_agg) - atomic_inc(&sta_priv->pending_frames); - - if ((iwl_legacy_queue_space(q) < q->high_mark) && - priv->mac80211_registered) { - if (wait_write_ptr) { - spin_lock_irqsave(&priv->lock, flags); - txq->need_update = 1; - iwl_legacy_txq_update_write_ptr(priv, txq); - spin_unlock_irqrestore(&priv->lock, flags); - } else { - iwl_legacy_stop_queue(priv, txq); - } - } - - return 0; - -drop_unlock: - spin_unlock_irqrestore(&priv->lock, flags); - return -1; -} - -static inline int iwl4965_alloc_dma_ptr(struct iwl_priv *priv, - struct iwl_dma_ptr *ptr, size_t size) -{ - ptr->addr = dma_alloc_coherent(&priv->pci_dev->dev, size, &ptr->dma, - GFP_KERNEL); - if (!ptr->addr) - return -ENOMEM; - ptr->size = size; - return 0; -} - -static inline void iwl4965_free_dma_ptr(struct iwl_priv *priv, - struct iwl_dma_ptr *ptr) -{ - if (unlikely(!ptr->addr)) - return; - - dma_free_coherent(&priv->pci_dev->dev, ptr->size, ptr->addr, ptr->dma); - memset(ptr, 0, sizeof(*ptr)); -} - -/** - * iwl4965_hw_txq_ctx_free - Free TXQ Context - * - * Destroy all TX DMA queues and structures - */ -void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv) -{ - int txq_id; - - /* Tx queues */ - if (priv->txq) { - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - if (txq_id == priv->cmd_queue) - iwl_legacy_cmd_queue_free(priv); - else - iwl_legacy_tx_queue_free(priv, txq_id); - } - iwl4965_free_dma_ptr(priv, &priv->kw); - - iwl4965_free_dma_ptr(priv, &priv->scd_bc_tbls); - - /* free tx queue structure */ - iwl_legacy_txq_mem(priv); -} - -/** - * iwl4965_txq_ctx_alloc - allocate TX queue context - * Allocate all Tx DMA structures and initialize them - * - * @param priv - * @return error code - */ -int iwl4965_txq_ctx_alloc(struct iwl_priv *priv) -{ - int ret; - int txq_id, slots_num; - unsigned long flags; - - /* Free all tx/cmd queues and keep-warm buffer */ - iwl4965_hw_txq_ctx_free(priv); - - ret = iwl4965_alloc_dma_ptr(priv, &priv->scd_bc_tbls, - priv->hw_params.scd_bc_tbls_size); - if (ret) { - IWL_ERR(priv, "Scheduler BC Table allocation failed\n"); - goto error_bc_tbls; - } - /* Alloc keep-warm buffer */ - ret = iwl4965_alloc_dma_ptr(priv, &priv->kw, IWL_KW_SIZE); - if (ret) { - IWL_ERR(priv, "Keep Warm allocation failed\n"); - goto error_kw; - } - - /* allocate tx queue structure */ - ret = iwl_legacy_alloc_txq_mem(priv); - if (ret) - goto error; - - spin_lock_irqsave(&priv->lock, flags); - - /* Turn off all Tx DMA fifos */ - iwl4965_txq_set_sched(priv, 0); - - /* Tell NIC where to find the "keep warm" buffer */ - iwl_legacy_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4); - - spin_unlock_irqrestore(&priv->lock, flags); - - /* Alloc and init all Tx queues, including the command queue (#4/#9) */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { - slots_num = (txq_id == priv->cmd_queue) ? - TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; - ret = iwl_legacy_tx_queue_init(priv, - &priv->txq[txq_id], slots_num, - txq_id); - if (ret) { - IWL_ERR(priv, "Tx %d queue init failed\n", txq_id); - goto error; - } - } - - return ret; - - error: - iwl4965_hw_txq_ctx_free(priv); - iwl4965_free_dma_ptr(priv, &priv->kw); - error_kw: - iwl4965_free_dma_ptr(priv, &priv->scd_bc_tbls); - error_bc_tbls: - return ret; -} - -void iwl4965_txq_ctx_reset(struct iwl_priv *priv) -{ - int txq_id, slots_num; - unsigned long flags; - - spin_lock_irqsave(&priv->lock, flags); - - /* Turn off all Tx DMA fifos */ - iwl4965_txq_set_sched(priv, 0); - - /* Tell NIC where to find the "keep warm" buffer */ - iwl_legacy_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4); - - spin_unlock_irqrestore(&priv->lock, flags); - - /* Alloc and init all Tx queues, including the command queue (#4) */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { - slots_num = txq_id == priv->cmd_queue ? - TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; - iwl_legacy_tx_queue_reset(priv, &priv->txq[txq_id], - slots_num, txq_id); - } -} - -/** - * iwl4965_txq_ctx_stop - Stop all Tx DMA channels - */ -void iwl4965_txq_ctx_stop(struct iwl_priv *priv) -{ - int ch, txq_id; - unsigned long flags; - - /* Turn off all Tx DMA fifos */ - spin_lock_irqsave(&priv->lock, flags); - - iwl4965_txq_set_sched(priv, 0); - - /* Stop each Tx DMA channel, and wait for it to be idle */ - for (ch = 0; ch < priv->hw_params.dma_chnl_num; ch++) { - iwl_legacy_write_direct32(priv, - FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); - if (iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG, - FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), - 1000)) - IWL_ERR(priv, "Failing on timeout while stopping" - " DMA channel %d [0x%08x]", ch, - iwl_legacy_read_direct32(priv, - FH_TSSR_TX_STATUS_REG)); - } - spin_unlock_irqrestore(&priv->lock, flags); - - if (!priv->txq) - return; - - /* Unmap DMA from host system and free skb's */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - if (txq_id == priv->cmd_queue) - iwl_legacy_cmd_queue_unmap(priv); - else - iwl_legacy_tx_queue_unmap(priv, txq_id); -} - -/* - * Find first available (lowest unused) Tx Queue, mark it "active". - * Called only when finding queue for aggregation. - * Should never return anything < 7, because they should already - * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) - */ -static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv) -{ - int txq_id; - - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) - return txq_id; - return -1; -} - -/** - * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration - */ -static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv, - u16 txq_id) -{ - /* Simply stop the queue, but don't change any configuration; - * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ - iwl_legacy_write_prph(priv, - IWL49_SCD_QUEUE_STATUS_BITS(txq_id), - (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)| - (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); -} - -/** - * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue - */ -static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid, - u16 txq_id) -{ - u32 tbl_dw_addr; - u32 tbl_dw; - u16 scd_q2ratid; - - scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; - - tbl_dw_addr = priv->scd_base_addr + - IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); - - tbl_dw = iwl_legacy_read_targ_mem(priv, tbl_dw_addr); - - if (txq_id & 0x1) - tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); - else - tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); - - iwl_legacy_write_targ_mem(priv, tbl_dw_addr, tbl_dw); - - return 0; -} - -/** - * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue - * - * NOTE: txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE, - * i.e. it must be one of the higher queues used for aggregation - */ -static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id, - int tx_fifo, int sta_id, int tid, u16 ssn_idx) -{ - unsigned long flags; - u16 ra_tid; - int ret; - - if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) || - (IWL49_FIRST_AMPDU_QUEUE + - priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) { - IWL_WARN(priv, - "queue number out of range: %d, must be %d to %d\n", - txq_id, IWL49_FIRST_AMPDU_QUEUE, - IWL49_FIRST_AMPDU_QUEUE + - priv->cfg->base_params->num_of_ampdu_queues - 1); - return -EINVAL; - } - - ra_tid = BUILD_RAxTID(sta_id, tid); - - /* Modify device's station table to Tx this TID */ - ret = iwl4965_sta_tx_modify_enable_tid(priv, sta_id, tid); - if (ret) - return ret; - - spin_lock_irqsave(&priv->lock, flags); - - /* Stop this Tx queue before configuring it */ - iwl4965_tx_queue_stop_scheduler(priv, txq_id); - - /* Map receiver-address / traffic-ID to this queue */ - iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id); - - /* Set this queue as a chain-building queue */ - iwl_legacy_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); - - /* Place first TFD at index corresponding to start sequence number. - * Assumes that ssn_idx is valid (!= 0xFFF) */ - priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); - priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); - iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx); - - /* Set up Tx window size and frame limit for this queue */ - iwl_legacy_write_targ_mem(priv, - priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id), - (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & - IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); - - iwl_legacy_write_targ_mem(priv, priv->scd_base_addr + - IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), - (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) - & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); - - iwl_legacy_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id)); - - /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ - iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1); - - spin_unlock_irqrestore(&priv->lock, flags); - - return 0; -} - - -int iwl4965_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, - struct ieee80211_sta *sta, u16 tid, u16 *ssn) -{ - int sta_id; - int tx_fifo; - int txq_id; - int ret; - unsigned long flags; - struct iwl_tid_data *tid_data; - - tx_fifo = iwl4965_get_fifo_from_tid(iwl_legacy_rxon_ctx_from_vif(vif), tid); - if (unlikely(tx_fifo < 0)) - return tx_fifo; - - IWL_WARN(priv, "%s on ra = %pM tid = %d\n", - __func__, sta->addr, tid); - - sta_id = iwl_legacy_sta_id(sta); - if (sta_id == IWL_INVALID_STATION) { - IWL_ERR(priv, "Start AGG on invalid station\n"); - return -ENXIO; - } - if (unlikely(tid >= MAX_TID_COUNT)) - return -EINVAL; - - if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) { - IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); - return -ENXIO; - } - - txq_id = iwl4965_txq_ctx_activate_free(priv); - if (txq_id == -1) { - IWL_ERR(priv, "No free aggregation queue available\n"); - return -ENXIO; - } - - spin_lock_irqsave(&priv->sta_lock, flags); - tid_data = &priv->stations[sta_id].tid[tid]; - *ssn = SEQ_TO_SN(tid_data->seq_number); - tid_data->agg.txq_id = txq_id; - iwl_legacy_set_swq_id(&priv->txq[txq_id], - iwl4965_get_ac_from_tid(tid), txq_id); - spin_unlock_irqrestore(&priv->sta_lock, flags); - - ret = iwl4965_txq_agg_enable(priv, txq_id, tx_fifo, - sta_id, tid, *ssn); - if (ret) - return ret; - - spin_lock_irqsave(&priv->sta_lock, flags); - tid_data = &priv->stations[sta_id].tid[tid]; - 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(vif, sta->addr, tid); - } else { - IWL_DEBUG_HT(priv, - "HW queue is NOT empty: %d packets in HW queue\n", - tid_data->tfds_in_queue); - tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; - } - spin_unlock_irqrestore(&priv->sta_lock, flags); - return ret; -} - -/** - * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE - * priv->lock must be held by the caller - */ -static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id, - u16 ssn_idx, u8 tx_fifo) -{ - if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) || - (IWL49_FIRST_AMPDU_QUEUE + - priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) { - IWL_WARN(priv, - "queue number out of range: %d, must be %d to %d\n", - txq_id, IWL49_FIRST_AMPDU_QUEUE, - IWL49_FIRST_AMPDU_QUEUE + - priv->cfg->base_params->num_of_ampdu_queues - 1); - return -EINVAL; - } - - iwl4965_tx_queue_stop_scheduler(priv, txq_id); - - iwl_legacy_clear_bits_prph(priv, - IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); - - priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); - priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); - /* supposes that ssn_idx is valid (!= 0xFFF) */ - iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx); - - iwl_legacy_clear_bits_prph(priv, - IWL49_SCD_INTERRUPT_MASK, (1 << txq_id)); - iwl_txq_ctx_deactivate(priv, txq_id); - iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0); - - return 0; -} - -int iwl4965_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, - struct ieee80211_sta *sta, u16 tid) -{ - int tx_fifo_id, txq_id, sta_id, ssn; - struct iwl_tid_data *tid_data; - int write_ptr, read_ptr; - unsigned long flags; - - tx_fifo_id = iwl4965_get_fifo_from_tid(iwl_legacy_rxon_ctx_from_vif(vif), tid); - if (unlikely(tx_fifo_id < 0)) - return tx_fifo_id; - - sta_id = iwl_legacy_sta_id(sta); - - if (sta_id == IWL_INVALID_STATION) { - IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); - return -ENXIO; - } - - spin_lock_irqsave(&priv->sta_lock, flags); - - tid_data = &priv->stations[sta_id].tid[tid]; - ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; - txq_id = tid_data->agg.txq_id; - - switch (priv->stations[sta_id].tid[tid].agg.state) { - case IWL_EMPTYING_HW_QUEUE_ADDBA: - /* - * This can happen if the peer stops aggregation - * again before we've had a chance to drain the - * queue we selected previously, i.e. before the - * session was really started completely. - */ - IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); - goto turn_off; - case IWL_AGG_ON: - break; - default: - IWL_WARN(priv, "Stopping AGG while state not ON or starting\n"); - } - - write_ptr = priv->txq[txq_id].q.write_ptr; - read_ptr = priv->txq[txq_id].q.read_ptr; - - /* The queue is not empty */ - if (write_ptr != read_ptr) { - IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n"); - priv->stations[sta_id].tid[tid].agg.state = - IWL_EMPTYING_HW_QUEUE_DELBA; - spin_unlock_irqrestore(&priv->sta_lock, flags); - return 0; - } - - IWL_DEBUG_HT(priv, "HW queue is empty\n"); - turn_off: - priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF; - - /* do not restore/save irqs */ - spin_unlock(&priv->sta_lock); - spin_lock(&priv->lock); - - /* - * the only reason this call can fail is queue number out of range, - * which can happen if uCode is reloaded and all the station - * information are lost. if it is outside the range, there is no need - * to deactivate the uCode queue, just return "success" to allow - * mac80211 to clean up it own data. - */ - iwl4965_txq_agg_disable(priv, txq_id, ssn, tx_fifo_id); - spin_unlock_irqrestore(&priv->lock, flags); - - ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); - - return 0; -} - -int iwl4965_txq_check_empty(struct iwl_priv *priv, - int sta_id, u8 tid, int txq_id) -{ - struct iwl_queue *q = &priv->txq[txq_id].q; - u8 *addr = priv->stations[sta_id].sta.sta.addr; - struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid]; - struct iwl_rxon_context *ctx; - - ctx = &priv->contexts[priv->stations[sta_id].ctxid]; - - lockdep_assert_held(&priv->sta_lock); - - switch (priv->stations[sta_id].tid[tid].agg.state) { - case IWL_EMPTYING_HW_QUEUE_DELBA: - /* We are reclaiming the last packet of the */ - /* aggregated HW queue */ - if ((txq_id == tid_data->agg.txq_id) && - (q->read_ptr == q->write_ptr)) { - u16 ssn = SEQ_TO_SN(tid_data->seq_number); - int tx_fifo = iwl4965_get_fifo_from_tid(ctx, tid); - IWL_DEBUG_HT(priv, - "HW queue empty: continue DELBA flow\n"); - iwl4965_txq_agg_disable(priv, txq_id, ssn, tx_fifo); - tid_data->agg.state = IWL_AGG_OFF; - ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid); - } - break; - case IWL_EMPTYING_HW_QUEUE_ADDBA: - /* We are reclaiming the last packet of the queue */ - 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(ctx->vif, addr, tid); - } - break; - } - - return 0; -} - -static void iwl4965_non_agg_tx_status(struct iwl_priv *priv, - struct iwl_rxon_context *ctx, - const u8 *addr1) -{ - struct ieee80211_sta *sta; - struct iwl_station_priv *sta_priv; - - rcu_read_lock(); - sta = ieee80211_find_sta(ctx->vif, 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); - } - rcu_read_unlock(); -} - -static void -iwl4965_tx_status(struct iwl_priv *priv, struct iwl_tx_info *tx_info, - bool is_agg) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx_info->skb->data; - - if (!is_agg) - iwl4965_non_agg_tx_status(priv, tx_info->ctx, hdr->addr1); - - ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb); -} - -int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct iwl_queue *q = &txq->q; - struct iwl_tx_info *tx_info; - int nfreed = 0; - struct ieee80211_hdr *hdr; - - if ((index >= q->n_bd) || (iwl_legacy_queue_used(q, index) == 0)) { - IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, " - "is out of range [0-%d] %d %d.\n", txq_id, - index, q->n_bd, q->write_ptr, q->read_ptr); - return 0; - } - - for (index = iwl_legacy_queue_inc_wrap(index, q->n_bd); - q->read_ptr != index; - q->read_ptr = iwl_legacy_queue_inc_wrap(q->read_ptr, q->n_bd)) { - - tx_info = &txq->txb[txq->q.read_ptr]; - - if (WARN_ON_ONCE(tx_info->skb == NULL)) - continue; - - hdr = (struct ieee80211_hdr *)tx_info->skb->data; - if (ieee80211_is_data_qos(hdr->frame_control)) - nfreed++; - - iwl4965_tx_status(priv, tx_info, - txq_id >= IWL4965_FIRST_AMPDU_QUEUE); - tx_info->skb = NULL; - - priv->cfg->ops->lib->txq_free_tfd(priv, txq); - } - return nfreed; -} - -/** - * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack - * - * Go through block-ack's bitmap of ACK'd frames, update driver's record of - * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. - */ -static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv, - struct iwl_ht_agg *agg, - struct iwl_compressed_ba_resp *ba_resp) - -{ - int i, sh, ack; - u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); - u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); - int successes = 0; - struct ieee80211_tx_info *info; - u64 bitmap, sent_bitmap; - - if (unlikely(!agg->wait_for_ba)) { - if (unlikely(ba_resp->bitmap)) - IWL_ERR(priv, "Received BA when not expected\n"); - return -EINVAL; - } - - /* Mark that the expected block-ack response arrived */ - agg->wait_for_ba = 0; - IWL_DEBUG_TX_REPLY(priv, "BA %d %d\n", agg->start_idx, - ba_resp->seq_ctl); - - /* Calculate shift to align block-ack bits with our Tx window bits */ - sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl >> 4); - if (sh < 0) /* tbw something is wrong with indices */ - sh += 0x100; - - if (agg->frame_count > (64 - sh)) { - IWL_DEBUG_TX_REPLY(priv, "more frames than bitmap size"); - return -1; - } - - /* don't use 64-bit values for now */ - bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; - - /* check for success or failure according to the - * transmitted bitmap and block-ack bitmap */ - sent_bitmap = bitmap & agg->bitmap; - - /* For each frame attempted in aggregation, - * update driver's record of tx frame's status. */ - i = 0; - while (sent_bitmap) { - ack = sent_bitmap & 1ULL; - successes += ack; - IWL_DEBUG_TX_REPLY(priv, "%s ON i=%d idx=%d raw=%d\n", - ack ? "ACK" : "NACK", i, - (agg->start_idx + i) & 0xff, - agg->start_idx + i); - sent_bitmap >>= 1; - ++i; - } - - IWL_DEBUG_TX_REPLY(priv, "Bitmap %llx\n", - (unsigned long long)bitmap); - - info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb); - memset(&info->status, 0, sizeof(info->status)); - info->flags |= IEEE80211_TX_STAT_ACK; - info->flags |= IEEE80211_TX_STAT_AMPDU; - info->status.ampdu_ack_len = successes; - info->status.ampdu_len = agg->frame_count; - iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags, info); - - return 0; -} - -/** - * translate ucode response to mac80211 tx status control values - */ -void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, - struct ieee80211_tx_info *info) -{ - struct ieee80211_tx_rate *r = &info->control.rates[0]; - - info->antenna_sel_tx = - ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); - if (rate_n_flags & RATE_MCS_HT_MSK) - r->flags |= IEEE80211_TX_RC_MCS; - if (rate_n_flags & RATE_MCS_GF_MSK) - r->flags |= IEEE80211_TX_RC_GREEN_FIELD; - if (rate_n_flags & RATE_MCS_HT40_MSK) - r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; - if (rate_n_flags & RATE_MCS_DUP_MSK) - r->flags |= IEEE80211_TX_RC_DUP_DATA; - if (rate_n_flags & RATE_MCS_SGI_MSK) - r->flags |= IEEE80211_TX_RC_SHORT_GI; - r->idx = iwl4965_hwrate_to_mac80211_idx(rate_n_flags, info->band); -} - -/** - * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA - * - * Handles block-acknowledge notification from device, which reports success - * of frames sent via aggregation. - */ -void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv, - struct iwl_rx_mem_buffer *rxb) -{ - 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; - int index; - int sta_id; - int tid; - unsigned long flags; - - /* "flow" corresponds to Tx queue */ - u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); - - /* "ssn" is start of block-ack Tx window, corresponds to index - * (in Tx queue's circular buffer) of first TFD/frame in window */ - u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); - - if (scd_flow >= priv->hw_params.max_txq_num) { - IWL_ERR(priv, - "BUG_ON scd_flow is bigger than number of queues\n"); - return; - } - - txq = &priv->txq[scd_flow]; - sta_id = ba_resp->sta_id; - tid = ba_resp->tid; - agg = &priv->stations[sta_id].tid[tid].agg; - if (unlikely(agg->txq_id != scd_flow)) { - /* - * FIXME: this is a uCode bug which need to be addressed, - * log the information and return for now! - * since it is possible happen very often and in order - * not to fill the syslog, don't enable the logging by default - */ - IWL_DEBUG_TX_REPLY(priv, - "BA scd_flow %d does not match txq_id %d\n", - scd_flow, agg->txq_id); - return; - } - - /* Find index just before block-ack window */ - index = iwl_legacy_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); - - spin_lock_irqsave(&priv->sta_lock, flags); - - IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " - "sta_id = %d\n", - agg->wait_for_ba, - (u8 *) &ba_resp->sta_addr_lo32, - ba_resp->sta_id); - IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx," - "scd_flow = " - "%d, scd_ssn = %d\n", - ba_resp->tid, - ba_resp->seq_ctl, - (unsigned long long)le64_to_cpu(ba_resp->bitmap), - ba_resp->scd_flow, - ba_resp->scd_ssn); - IWL_DEBUG_TX_REPLY(priv, "DAT start_idx = %d, bitmap = 0x%llx\n", - agg->start_idx, - (unsigned long long)agg->bitmap); - - /* Update driver's record of ACK vs. not for each frame in window */ - iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp); - - /* Release all TFDs before the SSN, i.e. all TFDs in front of - * block-ack window (we assume that they've been successfully - * transmitted ... if not, it's too late anyway). */ - if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { - /* calculate mac80211 ampdu sw queue to wake */ - int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index); - iwl4965_free_tfds_in_queue(priv, sta_id, tid, freed); - - if ((iwl_legacy_queue_space(&txq->q) > txq->q.low_mark) && - priv->mac80211_registered && - (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) - iwl_legacy_wake_queue(priv, txq); - - iwl4965_txq_check_empty(priv, sta_id, tid, scd_flow); - } - - spin_unlock_irqrestore(&priv->sta_lock, flags); -} - -#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG -const char *iwl4965_get_tx_fail_reason(u32 status) -{ -#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x -#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x - - switch (status & TX_STATUS_MSK) { - case TX_STATUS_SUCCESS: - return "SUCCESS"; - TX_STATUS_POSTPONE(DELAY); - TX_STATUS_POSTPONE(FEW_BYTES); - TX_STATUS_POSTPONE(QUIET_PERIOD); - TX_STATUS_POSTPONE(CALC_TTAK); - TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); - TX_STATUS_FAIL(SHORT_LIMIT); - TX_STATUS_FAIL(LONG_LIMIT); - TX_STATUS_FAIL(FIFO_UNDERRUN); - TX_STATUS_FAIL(DRAIN_FLOW); - TX_STATUS_FAIL(RFKILL_FLUSH); - TX_STATUS_FAIL(LIFE_EXPIRE); - TX_STATUS_FAIL(DEST_PS); - TX_STATUS_FAIL(HOST_ABORTED); - TX_STATUS_FAIL(BT_RETRY); - TX_STATUS_FAIL(STA_INVALID); - TX_STATUS_FAIL(FRAG_DROPPED); - TX_STATUS_FAIL(TID_DISABLE); - TX_STATUS_FAIL(FIFO_FLUSHED); - TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); - TX_STATUS_FAIL(PASSIVE_NO_RX); - TX_STATUS_FAIL(NO_BEACON_ON_RADAR); - } - - return "UNKNOWN"; - -#undef TX_STATUS_FAIL -#undef TX_STATUS_POSTPONE -} -#endif /* CONFIG_IWLWIFI_LEGACY_DEBUG */ |
