Wey-Yi Guy | b305a08 | 2010-03-16 17:41:22 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * GPL LICENSE SUMMARY |
| 4 | * |
Wey-Yi Guy | 901069c | 2011-04-05 09:42:00 -0700 | [diff] [blame] | 5 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
Wey-Yi Guy | b305a08 | 2010-03-16 17:41:22 -0700 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of version 2 of the GNU General Public License as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, |
| 19 | * USA |
| 20 | * |
| 21 | * The full GNU General Public License is included in this distribution |
| 22 | * in the file called LICENSE.GPL. |
| 23 | * |
| 24 | * Contact Information: |
| 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
| 26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 27 | * |
| 28 | *****************************************************************************/ |
| 29 | |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/sched.h> |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 34 | #include <linux/ieee80211.h> |
Wey-Yi Guy | b305a08 | 2010-03-16 17:41:22 -0700 | [diff] [blame] | 35 | |
| 36 | #include "iwl-dev.h" |
| 37 | #include "iwl-core.h" |
| 38 | #include "iwl-sta.h" |
| 39 | #include "iwl-io.h" |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 40 | #include "iwl-helpers.h" |
Wey-Yi Guy | 19e6cda | 2010-03-16 17:41:23 -0700 | [diff] [blame] | 41 | #include "iwl-agn-hw.h" |
Wey-Yi Guy | 8d80108 | 2010-03-17 13:34:36 -0700 | [diff] [blame] | 42 | #include "iwl-agn.h" |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 43 | #include "iwl-trans.h" |
Wey-Yi Guy | b305a08 | 2010-03-16 17:41:22 -0700 | [diff] [blame] | 44 | |
Don Fry | 5c3d29f | 2011-07-08 08:46:29 -0700 | [diff] [blame] | 45 | static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, |
| 46 | struct ieee80211_tx_info *info, |
| 47 | __le16 fc, __le32 *tx_flags) |
| 48 | { |
| 49 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || |
| 50 | info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || |
| 51 | info->flags & IEEE80211_TX_CTL_AMPDU) |
| 52 | *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; |
| 53 | } |
| 54 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 55 | /* |
| 56 | * handle build REPLY_TX command notification. |
| 57 | */ |
| 58 | static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, |
Johannes Berg | c6baf7f | 2011-07-23 10:24:47 -0700 | [diff] [blame] | 59 | struct sk_buff *skb, |
| 60 | struct iwl_tx_cmd *tx_cmd, |
| 61 | struct ieee80211_tx_info *info, |
| 62 | struct ieee80211_hdr *hdr, u8 sta_id) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 63 | { |
| 64 | __le16 fc = hdr->frame_control; |
| 65 | __le32 tx_flags = tx_cmd->tx_flags; |
| 66 | |
| 67 | tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 68 | |
Johannes Berg | 2c2def1 | 2011-07-07 05:11:51 -0700 | [diff] [blame] | 69 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
| 70 | tx_flags |= TX_CMD_FLG_ACK_MSK; |
| 71 | else |
| 72 | tx_flags &= ~TX_CMD_FLG_ACK_MSK; |
| 73 | |
| 74 | if (ieee80211_is_probe_resp(fc)) |
| 75 | tx_flags |= TX_CMD_FLG_TSF_MSK; |
| 76 | else if (ieee80211_is_back_req(fc)) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 77 | tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; |
Johannes Berg | d44ae69 | 2010-08-23 07:56:56 -0700 | [diff] [blame] | 78 | else if (info->band == IEEE80211_BAND_2GHZ && |
Wey-Yi Guy | 7cb1b08 | 2010-10-06 08:10:00 -0700 | [diff] [blame] | 79 | priv->cfg->bt_params && |
| 80 | priv->cfg->bt_params->advanced_bt_coexist && |
Johannes Berg | d44ae69 | 2010-08-23 07:56:56 -0700 | [diff] [blame] | 81 | (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || |
| 82 | ieee80211_is_reassoc_req(fc) || |
| 83 | skb->protocol == cpu_to_be16(ETH_P_PAE))) |
| 84 | tx_flags |= TX_CMD_FLG_IGNORE_BT; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 85 | |
| 86 | |
Johannes Berg | c6baf7f | 2011-07-23 10:24:47 -0700 | [diff] [blame] | 87 | tx_cmd->sta_id = sta_id; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 88 | if (ieee80211_has_morefrags(fc)) |
| 89 | tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; |
| 90 | |
| 91 | if (ieee80211_is_data_qos(fc)) { |
| 92 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
| 93 | tx_cmd->tid_tspec = qc[0] & 0xf; |
| 94 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; |
| 95 | } else { |
| 96 | tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; |
| 97 | } |
| 98 | |
Don Fry | 5c3d29f | 2011-07-08 08:46:29 -0700 | [diff] [blame] | 99 | iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 100 | |
| 101 | tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); |
| 102 | if (ieee80211_is_mgmt(fc)) { |
| 103 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) |
| 104 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); |
| 105 | else |
| 106 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); |
| 107 | } else { |
| 108 | tx_cmd->timeout.pm_frame_timeout = 0; |
| 109 | } |
| 110 | |
| 111 | tx_cmd->driver_txop = 0; |
| 112 | tx_cmd->tx_flags = tx_flags; |
| 113 | tx_cmd->next_frame_len = 0; |
| 114 | } |
| 115 | |
| 116 | #define RTS_DFAULT_RETRY_LIMIT 60 |
| 117 | |
| 118 | static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, |
Johannes Berg | c6baf7f | 2011-07-23 10:24:47 -0700 | [diff] [blame] | 119 | struct iwl_tx_cmd *tx_cmd, |
| 120 | struct ieee80211_tx_info *info, |
| 121 | __le16 fc) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 122 | { |
| 123 | u32 rate_flags; |
| 124 | int rate_idx; |
| 125 | u8 rts_retry_limit; |
| 126 | u8 data_retry_limit; |
| 127 | u8 rate_plcp; |
| 128 | |
| 129 | /* Set retry limit on DATA packets and Probe Responses*/ |
| 130 | if (ieee80211_is_probe_resp(fc)) |
| 131 | data_retry_limit = 3; |
| 132 | else |
Wey-Yi Guy | b744cb7 | 2010-03-23 11:37:59 -0700 | [diff] [blame] | 133 | data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 134 | tx_cmd->data_retry_limit = data_retry_limit; |
| 135 | |
| 136 | /* Set retry limit on RTS packets */ |
| 137 | rts_retry_limit = RTS_DFAULT_RETRY_LIMIT; |
| 138 | if (data_retry_limit < rts_retry_limit) |
| 139 | rts_retry_limit = data_retry_limit; |
| 140 | tx_cmd->rts_retry_limit = rts_retry_limit; |
| 141 | |
| 142 | /* DATA packets will use the uCode station table for rate/antenna |
| 143 | * selection */ |
| 144 | if (ieee80211_is_data(fc)) { |
| 145 | tx_cmd->initial_rate_index = 0; |
| 146 | tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; |
Wey-Yi Guy | c10e2c1 | 2011-07-13 11:13:46 -0700 | [diff] [blame] | 147 | #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL |
Wey-Yi Guy | 4e30811 | 2011-07-08 08:46:28 -0700 | [diff] [blame] | 148 | if (priv->tm_fixed_rate) { |
| 149 | /* |
| 150 | * rate overwrite by testmode |
| 151 | * we not only send lq command to change rate |
| 152 | * we also re-enforce per data pkt base. |
| 153 | */ |
| 154 | tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK; |
| 155 | memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate, |
| 156 | sizeof(tx_cmd->rate_n_flags)); |
| 157 | } |
Wey-Yi Guy | c10e2c1 | 2011-07-13 11:13:46 -0700 | [diff] [blame] | 158 | #endif |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 159 | return; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * If the current TX rate stored in mac80211 has the MCS bit set, it's |
| 164 | * not really a TX rate. Thus, we use the lowest supported rate for |
| 165 | * this band. Also use the lowest supported rate if the stored rate |
| 166 | * index is invalid. |
| 167 | */ |
| 168 | rate_idx = info->control.rates[0].idx; |
| 169 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || |
| 170 | (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) |
| 171 | rate_idx = rate_lowest_index(&priv->bands[info->band], |
| 172 | info->control.sta); |
| 173 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ |
| 174 | if (info->band == IEEE80211_BAND_5GHZ) |
| 175 | rate_idx += IWL_FIRST_OFDM_RATE; |
| 176 | /* Get PLCP rate for tx_cmd->rate_n_flags */ |
| 177 | rate_plcp = iwl_rates[rate_idx].plcp; |
| 178 | /* Zero out flags for this packet */ |
| 179 | rate_flags = 0; |
| 180 | |
| 181 | /* Set CCK flag as needed */ |
| 182 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) |
| 183 | rate_flags |= RATE_MCS_CCK_MSK; |
| 184 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 185 | /* Set up antennas */ |
Wey-Yi Guy | 7cb1b08 | 2010-10-06 08:10:00 -0700 | [diff] [blame] | 186 | if (priv->cfg->bt_params && |
| 187 | priv->cfg->bt_params->advanced_bt_coexist && |
| 188 | priv->bt_full_concurrent) { |
Wey-Yi Guy | bee008b | 2010-08-23 07:57:04 -0700 | [diff] [blame] | 189 | /* operated as 1x1 in full concurrency mode */ |
| 190 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, |
Emmanuel Grumbach | d618912 | 2011-08-25 23:10:39 -0700 | [diff] [blame] | 191 | first_antenna(hw_params(priv).valid_tx_ant)); |
Wey-Yi Guy | bee008b | 2010-08-23 07:57:04 -0700 | [diff] [blame] | 192 | } else |
| 193 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, |
Emmanuel Grumbach | d618912 | 2011-08-25 23:10:39 -0700 | [diff] [blame] | 194 | hw_params(priv).valid_tx_ant); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 195 | rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); |
| 196 | |
| 197 | /* Set the rate in the TX cmd */ |
| 198 | tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); |
| 199 | } |
| 200 | |
| 201 | static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, |
| 202 | struct ieee80211_tx_info *info, |
| 203 | struct iwl_tx_cmd *tx_cmd, |
| 204 | struct sk_buff *skb_frag, |
| 205 | int sta_id) |
| 206 | { |
| 207 | struct ieee80211_key_conf *keyconf = info->control.hw_key; |
| 208 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 209 | switch (keyconf->cipher) { |
| 210 | case WLAN_CIPHER_SUITE_CCMP: |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 211 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
| 212 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); |
| 213 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| 214 | tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; |
| 215 | IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); |
| 216 | break; |
| 217 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 218 | case WLAN_CIPHER_SUITE_TKIP: |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 219 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
Johannes Berg | 523b02e | 2011-07-07 22:28:01 +0200 | [diff] [blame] | 220 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 221 | IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); |
| 222 | break; |
| 223 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 224 | case WLAN_CIPHER_SUITE_WEP104: |
| 225 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; |
| 226 | /* fall through */ |
| 227 | case WLAN_CIPHER_SUITE_WEP40: |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 228 | tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | |
| 229 | (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); |
| 230 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 231 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
| 232 | |
| 233 | IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " |
| 234 | "with key %d\n", keyconf->keyidx); |
| 235 | break; |
| 236 | |
| 237 | default: |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 238 | IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 239 | break; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * start REPLY_TX command process |
| 245 | */ |
| 246 | int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) |
| 247 | { |
| 248 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 249 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 250 | struct iwl_station_priv *sta_priv = NULL; |
Johannes Berg | a194e32 | 2010-08-27 08:53:46 -0700 | [diff] [blame] | 251 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 252 | struct iwl_device_cmd *dev_cmd = NULL; |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 253 | struct iwl_tx_cmd *tx_cmd; |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 254 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 255 | __le16 fc; |
| 256 | u8 hdr_len; |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 257 | u16 len; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 258 | u8 sta_id; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 259 | unsigned long flags; |
Johannes Berg | 2e34034 | 2010-11-16 11:51:38 -0800 | [diff] [blame] | 260 | bool is_agg = false; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 261 | |
Johannes Berg | c6baf7f | 2011-07-23 10:24:47 -0700 | [diff] [blame] | 262 | if (info->control.vif) |
Johannes Berg | a194e32 | 2010-08-27 08:53:46 -0700 | [diff] [blame] | 263 | ctx = iwl_rxon_ctx_from_vif(info->control.vif); |
| 264 | |
Emmanuel Grumbach | 10b15e6 | 2011-08-25 23:10:43 -0700 | [diff] [blame] | 265 | spin_lock_irqsave(&priv->shrd->lock, flags); |
Emmanuel Grumbach | 845a9c0 | 2011-08-25 23:11:04 -0700 | [diff] [blame] | 266 | if (iwl_is_rfkill(priv->shrd)) { |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 267 | IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 268 | goto drop_unlock_priv; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | fc = hdr->frame_control; |
| 272 | |
| 273 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 274 | if (ieee80211_is_auth(fc)) |
| 275 | IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); |
| 276 | else if (ieee80211_is_assoc_req(fc)) |
| 277 | IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); |
| 278 | else if (ieee80211_is_reassoc_req(fc)) |
| 279 | IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); |
| 280 | #endif |
| 281 | |
| 282 | hdr_len = ieee80211_hdrlen(fc); |
| 283 | |
Stanislaw Gruszka | bfd3610 | 2011-04-29 17:51:06 +0200 | [diff] [blame] | 284 | /* For management frames use broadcast id to do not break aggregation */ |
| 285 | if (!ieee80211_is_data(fc)) |
| 286 | sta_id = ctx->bcast_sta_id; |
| 287 | else { |
| 288 | /* Find index into station table for destination station */ |
| 289 | sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta); |
| 290 | if (sta_id == IWL_INVALID_STATION) { |
| 291 | IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", |
| 292 | hdr->addr1); |
John W. Linville | e00cf3b | 2011-05-16 14:55:42 -0400 | [diff] [blame] | 293 | goto drop_unlock_priv; |
Stanislaw Gruszka | bfd3610 | 2011-04-29 17:51:06 +0200 | [diff] [blame] | 294 | } |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); |
| 298 | |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 299 | if (info->control.sta) |
| 300 | sta_priv = (void *)info->control.sta->drv_priv; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 301 | |
Johannes Berg | 67158b6 | 2010-11-16 11:51:04 -0800 | [diff] [blame] | 302 | if (sta_priv && sta_priv->asleep && |
| 303 | (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)) { |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 304 | /* |
| 305 | * This sends an asynchronous command to the device, |
| 306 | * but we can rely on it being processed before the |
| 307 | * next frame is processed -- and the next frame to |
| 308 | * this station is the one that will consume this |
| 309 | * counter. |
| 310 | * For now set the counter to just 1 since we do not |
| 311 | * support uAPSD yet. |
| 312 | */ |
| 313 | iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); |
| 314 | } |
| 315 | |
Emmanuel Grumbach | 08ecf10 | 2011-09-20 15:37:26 -0700 | [diff] [blame^] | 316 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| 317 | is_agg = true; |
| 318 | |
Emmanuel Grumbach | 10b15e6 | 2011-08-25 23:10:43 -0700 | [diff] [blame] | 319 | /* irqs already disabled/saved above when locking priv->shrd->lock */ |
Emmanuel Grumbach | f39c95e | 2011-08-25 23:10:47 -0700 | [diff] [blame] | 320 | spin_lock(&priv->shrd->sta_lock); |
Reinette Chatre | 9c5ac09 | 2010-05-05 02:26:06 -0700 | [diff] [blame] | 321 | |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 322 | dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC); |
| 323 | |
| 324 | if (unlikely(!dev_cmd)) |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 325 | goto drop_unlock_sta; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 326 | |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 327 | memset(dev_cmd, 0, sizeof(*dev_cmd)); |
Emmanuel Grumbach | 132f98c | 2011-09-20 15:37:24 -0700 | [diff] [blame] | 328 | tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 329 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 330 | /* Copy MAC header from skb into command buffer */ |
| 331 | memcpy(tx_cmd->hdr, hdr, hdr_len); |
| 332 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 333 | /* Total # bytes to be transmitted */ |
| 334 | len = (u16)skb->len; |
| 335 | tx_cmd->len = cpu_to_le16(len); |
| 336 | |
| 337 | if (info->control.hw_key) |
| 338 | iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id); |
| 339 | |
| 340 | /* TODO need this for burst mode later on */ |
Johannes Berg | d44ae69 | 2010-08-23 07:56:56 -0700 | [diff] [blame] | 341 | iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 342 | iwl_dbg_log_tx_data_frame(priv, len, hdr); |
| 343 | |
| 344 | iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc); |
| 345 | |
| 346 | iwl_update_stats(priv, true, fc, len); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 347 | |
Emmanuel Grumbach | 2c45229 | 2011-08-25 23:11:21 -0700 | [diff] [blame] | 348 | info->driver_data[0] = ctx; |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 349 | info->driver_data[1] = dev_cmd; |
Emmanuel Grumbach | 2c45229 | 2011-08-25 23:11:21 -0700 | [diff] [blame] | 350 | |
Emmanuel Grumbach | e13c0c5 | 2011-08-25 23:11:24 -0700 | [diff] [blame] | 351 | if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id)) |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 352 | goto drop_unlock_sta; |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 353 | |
Emmanuel Grumbach | f39c95e | 2011-08-25 23:10:47 -0700 | [diff] [blame] | 354 | spin_unlock(&priv->shrd->sta_lock); |
Emmanuel Grumbach | 10b15e6 | 2011-08-25 23:10:43 -0700 | [diff] [blame] | 355 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 356 | |
| 357 | /* |
Johannes Berg | 2e34034 | 2010-11-16 11:51:38 -0800 | [diff] [blame] | 358 | * Avoid atomic ops if it isn't an associated client. |
| 359 | * Also, if this is a packet for aggregation, don't |
| 360 | * increase the counter because the ucode will stop |
| 361 | * aggregation queues when their respective station |
| 362 | * goes to sleep. |
| 363 | */ |
| 364 | if (sta_priv && sta_priv->client && !is_agg) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 365 | atomic_inc(&sta_priv->pending_frames); |
| 366 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 367 | return 0; |
| 368 | |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 369 | drop_unlock_sta: |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 370 | if (dev_cmd) |
| 371 | kmem_cache_free(priv->tx_cmd_pool, dev_cmd); |
Emmanuel Grumbach | f39c95e | 2011-08-25 23:10:47 -0700 | [diff] [blame] | 372 | spin_unlock(&priv->shrd->sta_lock); |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 373 | drop_unlock_priv: |
Emmanuel Grumbach | 10b15e6 | 2011-08-25 23:10:43 -0700 | [diff] [blame] | 374 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 375 | return -1; |
| 376 | } |
| 377 | |
Johannes Berg | 832f47e | 2010-04-29 04:43:07 -0700 | [diff] [blame] | 378 | int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, |
Johannes Berg | 619753f | 2010-04-30 11:30:46 -0700 | [diff] [blame] | 379 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 380 | { |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 381 | struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 382 | int sta_id; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 383 | int ret; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 384 | |
Wey-Yi Guy | 5bc9890 | 2011-05-27 08:40:32 -0700 | [diff] [blame] | 385 | IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", |
| 386 | sta->addr, tid); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 387 | |
Johannes Berg | 619753f | 2010-04-30 11:30:46 -0700 | [diff] [blame] | 388 | sta_id = iwl_sta_id(sta); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 389 | if (sta_id == IWL_INVALID_STATION) { |
| 390 | IWL_ERR(priv, "Start AGG on invalid station\n"); |
| 391 | return -ENXIO; |
| 392 | } |
Emmanuel Grumbach | 5f85a78 | 2011-08-25 23:11:18 -0700 | [diff] [blame] | 393 | if (unlikely(tid >= IWL_MAX_TID_COUNT)) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 394 | return -EINVAL; |
| 395 | |
Emmanuel Grumbach | 5f85a78 | 2011-08-25 23:11:18 -0700 | [diff] [blame] | 396 | if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 397 | IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); |
| 398 | return -ENXIO; |
| 399 | } |
| 400 | |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 401 | ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 402 | if (ret) |
| 403 | return ret; |
| 404 | |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 405 | ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id, |
| 406 | tid, ssn); |
| 407 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 408 | return ret; |
| 409 | } |
| 410 | |
Johannes Berg | 832f47e | 2010-04-29 04:43:07 -0700 | [diff] [blame] | 411 | int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, |
Johannes Berg | 619753f | 2010-04-30 11:30:46 -0700 | [diff] [blame] | 412 | struct ieee80211_sta *sta, u16 tid) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 413 | { |
Emmanuel Grumbach | 7f01d56 | 2011-08-25 23:11:27 -0700 | [diff] [blame] | 414 | int sta_id; |
| 415 | struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 416 | |
Johannes Berg | 619753f | 2010-04-30 11:30:46 -0700 | [diff] [blame] | 417 | sta_id = iwl_sta_id(sta); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 418 | |
| 419 | if (sta_id == IWL_INVALID_STATION) { |
| 420 | IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); |
| 421 | return -ENXIO; |
| 422 | } |
| 423 | |
Emmanuel Grumbach | 7f01d56 | 2011-08-25 23:11:27 -0700 | [diff] [blame] | 424 | return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid, |
| 425 | sta_id, tid); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 426 | } |
| 427 | |
Johannes Berg | 2e34034 | 2010-11-16 11:51:38 -0800 | [diff] [blame] | 428 | static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, |
| 429 | struct iwl_rxon_context *ctx, |
| 430 | const u8 *addr1) |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 431 | { |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 432 | struct ieee80211_sta *sta; |
| 433 | struct iwl_station_priv *sta_priv; |
| 434 | |
Johannes Berg | 6db6340 | 2010-06-07 21:20:38 +0200 | [diff] [blame] | 435 | rcu_read_lock(); |
Johannes Berg | 2e34034 | 2010-11-16 11:51:38 -0800 | [diff] [blame] | 436 | sta = ieee80211_find_sta(ctx->vif, addr1); |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 437 | if (sta) { |
| 438 | sta_priv = (void *)sta->drv_priv; |
| 439 | /* avoid atomic ops if this isn't a client */ |
| 440 | if (sta_priv->client && |
| 441 | atomic_dec_return(&sta_priv->pending_frames) == 0) |
| 442 | ieee80211_sta_block_awake(priv->hw, sta, false); |
| 443 | } |
Johannes Berg | 6db6340 | 2010-06-07 21:20:38 +0200 | [diff] [blame] | 444 | rcu_read_unlock(); |
Johannes Berg | 2e34034 | 2010-11-16 11:51:38 -0800 | [diff] [blame] | 445 | } |
| 446 | |
Wey-Yi Guy | 74bcdb3 | 2010-03-17 13:34:34 -0700 | [diff] [blame] | 447 | /** |
Wey-Yi Guy | 8d80108 | 2010-03-17 13:34:36 -0700 | [diff] [blame] | 448 | * translate ucode response to mac80211 tx status control values |
| 449 | */ |
Emmanuel Grumbach | 04e1cab | 2011-08-25 23:11:01 -0700 | [diff] [blame] | 450 | static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, |
Wey-Yi Guy | 8d80108 | 2010-03-17 13:34:36 -0700 | [diff] [blame] | 451 | struct ieee80211_tx_info *info) |
| 452 | { |
| 453 | struct ieee80211_tx_rate *r = &info->control.rates[0]; |
| 454 | |
| 455 | info->antenna_sel_tx = |
| 456 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); |
| 457 | if (rate_n_flags & RATE_MCS_HT_MSK) |
| 458 | r->flags |= IEEE80211_TX_RC_MCS; |
| 459 | if (rate_n_flags & RATE_MCS_GF_MSK) |
| 460 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; |
| 461 | if (rate_n_flags & RATE_MCS_HT40_MSK) |
| 462 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
| 463 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
| 464 | r->flags |= IEEE80211_TX_RC_DUP_DATA; |
| 465 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
| 466 | r->flags |= IEEE80211_TX_RC_SHORT_GI; |
| 467 | r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); |
| 468 | } |
| 469 | |
Johannes Berg | 69fdb71 | 2010-09-22 18:02:02 +0200 | [diff] [blame] | 470 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 471 | const char *iwl_get_tx_fail_reason(u32 status) |
| 472 | { |
| 473 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x |
| 474 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x |
| 475 | |
| 476 | switch (status & TX_STATUS_MSK) { |
| 477 | case TX_STATUS_SUCCESS: |
| 478 | return "SUCCESS"; |
| 479 | TX_STATUS_POSTPONE(DELAY); |
| 480 | TX_STATUS_POSTPONE(FEW_BYTES); |
| 481 | TX_STATUS_POSTPONE(BT_PRIO); |
| 482 | TX_STATUS_POSTPONE(QUIET_PERIOD); |
| 483 | TX_STATUS_POSTPONE(CALC_TTAK); |
| 484 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); |
| 485 | TX_STATUS_FAIL(SHORT_LIMIT); |
| 486 | TX_STATUS_FAIL(LONG_LIMIT); |
| 487 | TX_STATUS_FAIL(FIFO_UNDERRUN); |
| 488 | TX_STATUS_FAIL(DRAIN_FLOW); |
| 489 | TX_STATUS_FAIL(RFKILL_FLUSH); |
| 490 | TX_STATUS_FAIL(LIFE_EXPIRE); |
| 491 | TX_STATUS_FAIL(DEST_PS); |
| 492 | TX_STATUS_FAIL(HOST_ABORTED); |
| 493 | TX_STATUS_FAIL(BT_RETRY); |
| 494 | TX_STATUS_FAIL(STA_INVALID); |
| 495 | TX_STATUS_FAIL(FRAG_DROPPED); |
| 496 | TX_STATUS_FAIL(TID_DISABLE); |
| 497 | TX_STATUS_FAIL(FIFO_FLUSHED); |
| 498 | TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); |
| 499 | TX_STATUS_FAIL(PASSIVE_NO_RX); |
| 500 | TX_STATUS_FAIL(NO_BEACON_ON_RADAR); |
| 501 | } |
| 502 | |
| 503 | return "UNKNOWN"; |
| 504 | |
| 505 | #undef TX_STATUS_FAIL |
| 506 | #undef TX_STATUS_POSTPONE |
| 507 | } |
| 508 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 509 | |
Emmanuel Grumbach | 04e1cab | 2011-08-25 23:11:01 -0700 | [diff] [blame] | 510 | static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) |
| 511 | { |
| 512 | status &= AGG_TX_STATUS_MSK; |
| 513 | |
| 514 | switch (status) { |
| 515 | case AGG_TX_STATE_UNDERRUN_MSK: |
| 516 | priv->reply_agg_tx_stats.underrun++; |
| 517 | break; |
| 518 | case AGG_TX_STATE_BT_PRIO_MSK: |
| 519 | priv->reply_agg_tx_stats.bt_prio++; |
| 520 | break; |
| 521 | case AGG_TX_STATE_FEW_BYTES_MSK: |
| 522 | priv->reply_agg_tx_stats.few_bytes++; |
| 523 | break; |
| 524 | case AGG_TX_STATE_ABORT_MSK: |
| 525 | priv->reply_agg_tx_stats.abort++; |
| 526 | break; |
| 527 | case AGG_TX_STATE_LAST_SENT_TTL_MSK: |
| 528 | priv->reply_agg_tx_stats.last_sent_ttl++; |
| 529 | break; |
| 530 | case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: |
| 531 | priv->reply_agg_tx_stats.last_sent_try++; |
| 532 | break; |
| 533 | case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: |
| 534 | priv->reply_agg_tx_stats.last_sent_bt_kill++; |
| 535 | break; |
| 536 | case AGG_TX_STATE_SCD_QUERY_MSK: |
| 537 | priv->reply_agg_tx_stats.scd_query++; |
| 538 | break; |
| 539 | case AGG_TX_STATE_TEST_BAD_CRC32_MSK: |
| 540 | priv->reply_agg_tx_stats.bad_crc32++; |
| 541 | break; |
| 542 | case AGG_TX_STATE_RESPONSE_MSK: |
| 543 | priv->reply_agg_tx_stats.response++; |
| 544 | break; |
| 545 | case AGG_TX_STATE_DUMP_TX_MSK: |
| 546 | priv->reply_agg_tx_stats.dump_tx++; |
| 547 | break; |
| 548 | case AGG_TX_STATE_DELAY_TX_MSK: |
| 549 | priv->reply_agg_tx_stats.delay_tx++; |
| 550 | break; |
| 551 | default: |
| 552 | priv->reply_agg_tx_stats.unknown++; |
| 553 | break; |
| 554 | } |
| 555 | } |
| 556 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 557 | static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, |
| 558 | struct iwlagn_tx_resp *tx_resp) |
| 559 | { |
| 560 | struct agg_tx_status *frame_status = &tx_resp->status; |
| 561 | int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
| 562 | IWLAGN_TX_RES_TID_POS; |
| 563 | int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> |
| 564 | IWLAGN_TX_RES_RA_POS; |
Emmanuel Grumbach | 5f85a78 | 2011-08-25 23:11:18 -0700 | [diff] [blame] | 565 | struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 566 | u32 status = le16_to_cpu(tx_resp->status.status); |
| 567 | int i; |
| 568 | |
| 569 | if (agg->wait_for_ba) |
| 570 | IWL_DEBUG_TX_REPLY(priv, |
| 571 | "got tx response w/o block-ack\n"); |
| 572 | |
| 573 | agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); |
| 574 | agg->wait_for_ba = (tx_resp->frame_count > 1); |
| 575 | |
| 576 | /* |
| 577 | * If the BT kill count is non-zero, we'll get this |
| 578 | * notification again. |
| 579 | */ |
| 580 | if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && |
| 581 | priv->cfg->bt_params && |
| 582 | priv->cfg->bt_params->advanced_bt_coexist) { |
| 583 | IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); |
| 584 | } |
| 585 | |
| 586 | /* Construct bit-map of pending frames within Tx window */ |
| 587 | for (i = 0; i < tx_resp->frame_count; i++) { |
| 588 | u16 fstatus = le16_to_cpu(frame_status[i].status); |
| 589 | |
| 590 | if (status & AGG_TX_STATUS_MSK) |
| 591 | iwlagn_count_agg_tx_err_status(priv, fstatus); |
| 592 | |
| 593 | if (status & (AGG_TX_STATE_FEW_BYTES_MSK | |
| 594 | AGG_TX_STATE_ABORT_MSK)) |
| 595 | continue; |
| 596 | |
| 597 | IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), " |
| 598 | "try-count (0x%08x)\n", |
| 599 | iwl_get_agg_tx_fail_reason(fstatus), |
| 600 | fstatus & AGG_TX_STATUS_MSK, |
| 601 | fstatus & AGG_TX_TRY_MSK); |
| 602 | } |
| 603 | } |
| 604 | |
Emmanuel Grumbach | 04e1cab | 2011-08-25 23:11:01 -0700 | [diff] [blame] | 605 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 606 | #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x |
| 607 | |
| 608 | const char *iwl_get_agg_tx_fail_reason(u16 status) |
| 609 | { |
| 610 | status &= AGG_TX_STATUS_MSK; |
| 611 | switch (status) { |
| 612 | case AGG_TX_STATE_TRANSMITTED: |
| 613 | return "SUCCESS"; |
| 614 | AGG_TX_STATE_FAIL(UNDERRUN_MSK); |
| 615 | AGG_TX_STATE_FAIL(BT_PRIO_MSK); |
| 616 | AGG_TX_STATE_FAIL(FEW_BYTES_MSK); |
| 617 | AGG_TX_STATE_FAIL(ABORT_MSK); |
| 618 | AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); |
| 619 | AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); |
| 620 | AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); |
| 621 | AGG_TX_STATE_FAIL(SCD_QUERY_MSK); |
| 622 | AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); |
| 623 | AGG_TX_STATE_FAIL(RESPONSE_MSK); |
| 624 | AGG_TX_STATE_FAIL(DUMP_TX_MSK); |
| 625 | AGG_TX_STATE_FAIL(DELAY_TX_MSK); |
| 626 | } |
| 627 | |
| 628 | return "UNKNOWN"; |
| 629 | } |
| 630 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
| 631 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 632 | static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) |
| 633 | { |
| 634 | return le32_to_cpup((__le32 *)&tx_resp->status + |
| 635 | tx_resp->frame_count) & MAX_SN; |
| 636 | } |
| 637 | |
Emmanuel Grumbach | 04e1cab | 2011-08-25 23:11:01 -0700 | [diff] [blame] | 638 | static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) |
| 639 | { |
| 640 | status &= TX_STATUS_MSK; |
| 641 | |
| 642 | switch (status) { |
| 643 | case TX_STATUS_POSTPONE_DELAY: |
| 644 | priv->reply_tx_stats.pp_delay++; |
| 645 | break; |
| 646 | case TX_STATUS_POSTPONE_FEW_BYTES: |
| 647 | priv->reply_tx_stats.pp_few_bytes++; |
| 648 | break; |
| 649 | case TX_STATUS_POSTPONE_BT_PRIO: |
| 650 | priv->reply_tx_stats.pp_bt_prio++; |
| 651 | break; |
| 652 | case TX_STATUS_POSTPONE_QUIET_PERIOD: |
| 653 | priv->reply_tx_stats.pp_quiet_period++; |
| 654 | break; |
| 655 | case TX_STATUS_POSTPONE_CALC_TTAK: |
| 656 | priv->reply_tx_stats.pp_calc_ttak++; |
| 657 | break; |
| 658 | case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: |
| 659 | priv->reply_tx_stats.int_crossed_retry++; |
| 660 | break; |
| 661 | case TX_STATUS_FAIL_SHORT_LIMIT: |
| 662 | priv->reply_tx_stats.short_limit++; |
| 663 | break; |
| 664 | case TX_STATUS_FAIL_LONG_LIMIT: |
| 665 | priv->reply_tx_stats.long_limit++; |
| 666 | break; |
| 667 | case TX_STATUS_FAIL_FIFO_UNDERRUN: |
| 668 | priv->reply_tx_stats.fifo_underrun++; |
| 669 | break; |
| 670 | case TX_STATUS_FAIL_DRAIN_FLOW: |
| 671 | priv->reply_tx_stats.drain_flow++; |
| 672 | break; |
| 673 | case TX_STATUS_FAIL_RFKILL_FLUSH: |
| 674 | priv->reply_tx_stats.rfkill_flush++; |
| 675 | break; |
| 676 | case TX_STATUS_FAIL_LIFE_EXPIRE: |
| 677 | priv->reply_tx_stats.life_expire++; |
| 678 | break; |
| 679 | case TX_STATUS_FAIL_DEST_PS: |
| 680 | priv->reply_tx_stats.dest_ps++; |
| 681 | break; |
| 682 | case TX_STATUS_FAIL_HOST_ABORTED: |
| 683 | priv->reply_tx_stats.host_abort++; |
| 684 | break; |
| 685 | case TX_STATUS_FAIL_BT_RETRY: |
| 686 | priv->reply_tx_stats.bt_retry++; |
| 687 | break; |
| 688 | case TX_STATUS_FAIL_STA_INVALID: |
| 689 | priv->reply_tx_stats.sta_invalid++; |
| 690 | break; |
| 691 | case TX_STATUS_FAIL_FRAG_DROPPED: |
| 692 | priv->reply_tx_stats.frag_drop++; |
| 693 | break; |
| 694 | case TX_STATUS_FAIL_TID_DISABLE: |
| 695 | priv->reply_tx_stats.tid_disable++; |
| 696 | break; |
| 697 | case TX_STATUS_FAIL_FIFO_FLUSHED: |
| 698 | priv->reply_tx_stats.fifo_flush++; |
| 699 | break; |
| 700 | case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: |
| 701 | priv->reply_tx_stats.insuff_cf_poll++; |
| 702 | break; |
| 703 | case TX_STATUS_FAIL_PASSIVE_NO_RX: |
| 704 | priv->reply_tx_stats.fail_hw_drop++; |
| 705 | break; |
| 706 | case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: |
| 707 | priv->reply_tx_stats.sta_color_mismatch++; |
| 708 | break; |
| 709 | default: |
| 710 | priv->reply_tx_stats.unknown++; |
| 711 | break; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | static void iwlagn_set_tx_status(struct iwl_priv *priv, |
| 716 | struct ieee80211_tx_info *info, |
| 717 | struct iwlagn_tx_resp *tx_resp, |
| 718 | bool is_agg) |
| 719 | { |
| 720 | u16 status = le16_to_cpu(tx_resp->status.status); |
| 721 | |
| 722 | info->status.rates[0].count = tx_resp->failure_frame + 1; |
| 723 | if (is_agg) |
| 724 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
| 725 | info->flags |= iwl_tx_status_to_mac80211(status); |
| 726 | iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), |
| 727 | info); |
| 728 | if (!iwl_is_tx_success(status)) |
| 729 | iwlagn_count_tx_err_status(priv, status); |
| 730 | } |
| 731 | |
| 732 | static void iwl_check_abort_status(struct iwl_priv *priv, |
| 733 | u8 frame_count, u32 status) |
| 734 | { |
| 735 | if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { |
| 736 | IWL_ERR(priv, "Tx flush command to flush out all frames\n"); |
| 737 | if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) |
| 738 | queue_work(priv->shrd->workqueue, &priv->tx_flush); |
| 739 | } |
| 740 | } |
| 741 | |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 742 | int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, |
| 743 | struct iwl_device_cmd *cmd) |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 744 | { |
| 745 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| 746 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); |
| 747 | int txq_id = SEQ_TO_QUEUE(sequence); |
Emmanuel Grumbach | ff62084 | 2011-09-06 09:31:25 -0700 | [diff] [blame] | 748 | int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 749 | struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; |
| 750 | struct ieee80211_hdr *hdr; |
| 751 | u32 status = le16_to_cpu(tx_resp->status.status); |
| 752 | u32 ssn = iwlagn_get_scd_ssn(tx_resp); |
| 753 | int tid; |
| 754 | int sta_id; |
| 755 | int freed; |
| 756 | struct ieee80211_tx_info *info; |
| 757 | unsigned long flags; |
| 758 | struct sk_buff_head skbs; |
| 759 | struct sk_buff *skb; |
| 760 | struct iwl_rxon_context *ctx; |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 761 | bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 762 | |
| 763 | tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
| 764 | IWLAGN_TX_RES_TID_POS; |
| 765 | sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> |
| 766 | IWLAGN_TX_RES_RA_POS; |
| 767 | |
| 768 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
| 769 | |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 770 | if (is_agg) |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 771 | iwl_rx_reply_tx_agg(priv, tx_resp); |
| 772 | |
| 773 | if (tx_resp->frame_count == 1) { |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 774 | __skb_queue_head_init(&skbs); |
| 775 | /*we can free until ssn % q.n_bd not inclusive */ |
Emmanuel Grumbach | 464021f | 2011-08-25 23:11:26 -0700 | [diff] [blame] | 776 | iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id, |
| 777 | ssn, status, &skbs); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 778 | freed = 0; |
| 779 | while (!skb_queue_empty(&skbs)) { |
| 780 | skb = __skb_dequeue(&skbs); |
| 781 | hdr = (struct ieee80211_hdr *)skb->data; |
| 782 | |
| 783 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
| 784 | priv->last_seq_ctl = tx_resp->seq_ctl; |
| 785 | |
| 786 | info = IEEE80211_SKB_CB(skb); |
| 787 | ctx = info->driver_data[0]; |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 788 | kmem_cache_free(priv->tx_cmd_pool, |
| 789 | (info->driver_data[1])); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 790 | |
| 791 | memset(&info->status, 0, sizeof(info->status)); |
| 792 | |
| 793 | if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && |
| 794 | iwl_is_associated_ctx(ctx) && ctx->vif && |
| 795 | ctx->vif->type == NL80211_IFTYPE_STATION) { |
| 796 | ctx->last_tx_rejected = true; |
Emmanuel Grumbach | e20d4341 | 2011-08-25 23:11:31 -0700 | [diff] [blame] | 797 | iwl_trans_stop_queue(trans(priv), txq_id); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 798 | |
| 799 | IWL_DEBUG_TX_REPLY(priv, |
| 800 | "TXQ %d status %s (0x%08x) " |
| 801 | "rate_n_flags 0x%x retries %d\n", |
| 802 | txq_id, |
| 803 | iwl_get_tx_fail_reason(status), |
| 804 | status, |
| 805 | le32_to_cpu(tx_resp->rate_n_flags), |
| 806 | tx_resp->failure_frame); |
| 807 | |
| 808 | IWL_DEBUG_TX_REPLY(priv, |
| 809 | "FrameCnt = %d, idx=%d\n", |
| 810 | tx_resp->frame_count, cmd_index); |
| 811 | } |
| 812 | |
| 813 | /* check if BAR is needed */ |
| 814 | if (is_agg && !iwl_is_tx_success(status)) |
| 815 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
| 816 | iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), |
| 817 | tx_resp, is_agg); |
| 818 | if (!is_agg) |
| 819 | iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); |
| 820 | |
| 821 | ieee80211_tx_status_irqsafe(priv->hw, skb); |
| 822 | |
| 823 | freed++; |
| 824 | } |
| 825 | |
| 826 | WARN_ON(!is_agg && freed != 1); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | iwl_check_abort_status(priv, tx_resp->frame_count, status); |
| 830 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 831 | return 0; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | /** |
| 835 | * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA |
| 836 | * |
| 837 | * Handles block-acknowledge notification from device, which reports success |
| 838 | * of frames sent via aggregation. |
| 839 | */ |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 840 | int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, |
| 841 | struct iwl_rx_mem_buffer *rxb, |
| 842 | struct iwl_device_cmd *cmd) |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 843 | { |
| 844 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| 845 | struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 846 | struct iwl_ht_agg *agg; |
| 847 | struct sk_buff_head reclaimed_skbs; |
| 848 | struct ieee80211_tx_info *info; |
| 849 | struct ieee80211_hdr *hdr; |
| 850 | struct sk_buff *skb; |
| 851 | unsigned long flags; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 852 | int sta_id; |
| 853 | int tid; |
| 854 | int freed; |
| 855 | |
| 856 | /* "flow" corresponds to Tx queue */ |
| 857 | u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); |
| 858 | |
| 859 | /* "ssn" is start of block-ack Tx window, corresponds to index |
| 860 | * (in Tx queue's circular buffer) of first TFD/frame in window */ |
| 861 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); |
| 862 | |
| 863 | if (scd_flow >= hw_params(priv).max_txq_num) { |
| 864 | IWL_ERR(priv, |
| 865 | "BUG_ON scd_flow is bigger than number of queues\n"); |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 866 | return 0; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 867 | } |
| 868 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 869 | sta_id = ba_resp->sta_id; |
| 870 | tid = ba_resp->tid; |
Emmanuel Grumbach | 5f85a78 | 2011-08-25 23:11:18 -0700 | [diff] [blame] | 871 | agg = &priv->shrd->tid_data[sta_id][tid].agg; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 872 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 873 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
| 874 | |
| 875 | if (unlikely(agg->txq_id != scd_flow)) { |
| 876 | /* |
| 877 | * FIXME: this is a uCode bug which need to be addressed, |
| 878 | * log the information and return for now! |
| 879 | * since it is possible happen very often and in order |
| 880 | * not to fill the syslog, don't enable the logging by default |
| 881 | */ |
| 882 | IWL_DEBUG_TX_REPLY(priv, |
| 883 | "BA scd_flow %d does not match txq_id %d\n", |
| 884 | scd_flow, agg->txq_id); |
| 885 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 886 | return 0; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | if (unlikely(!agg->wait_for_ba)) { |
| 890 | if (unlikely(ba_resp->bitmap)) |
| 891 | IWL_ERR(priv, "Received BA when not expected\n"); |
| 892 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 893 | return 0; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 894 | } |
| 895 | |
| 896 | IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " |
| 897 | "sta_id = %d\n", |
| 898 | agg->wait_for_ba, |
| 899 | (u8 *) &ba_resp->sta_addr_lo32, |
| 900 | ba_resp->sta_id); |
| 901 | IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " |
| 902 | "scd_flow = %d, scd_ssn = %d\n", |
| 903 | ba_resp->tid, |
| 904 | ba_resp->seq_ctl, |
| 905 | (unsigned long long)le64_to_cpu(ba_resp->bitmap), |
| 906 | ba_resp->scd_flow, |
| 907 | ba_resp->scd_ssn); |
| 908 | |
| 909 | /* Mark that the expected block-ack response arrived */ |
Emmanuel Grumbach | 21023e2 | 2011-09-15 11:46:34 -0700 | [diff] [blame] | 910 | agg->wait_for_ba = false; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 911 | |
| 912 | /* Sanity check values reported by uCode */ |
| 913 | if (ba_resp->txed_2_done > ba_resp->txed) { |
| 914 | IWL_DEBUG_TX_REPLY(priv, |
| 915 | "bogus sent(%d) and ack(%d) count\n", |
| 916 | ba_resp->txed, ba_resp->txed_2_done); |
| 917 | /* |
| 918 | * set txed_2_done = txed, |
| 919 | * so it won't impact rate scale |
| 920 | */ |
| 921 | ba_resp->txed = ba_resp->txed_2_done; |
| 922 | } |
| 923 | IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n", |
| 924 | ba_resp->txed, ba_resp->txed_2_done); |
| 925 | |
| 926 | __skb_queue_head_init(&reclaimed_skbs); |
| 927 | |
| 928 | /* Release all TFDs before the SSN, i.e. all TFDs in front of |
| 929 | * block-ack window (we assume that they've been successfully |
| 930 | * transmitted ... if not, it's too late anyway). */ |
Emmanuel Grumbach | 464021f | 2011-08-25 23:11:26 -0700 | [diff] [blame] | 931 | iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn, |
| 932 | 0, &reclaimed_skbs); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 933 | freed = 0; |
| 934 | while (!skb_queue_empty(&reclaimed_skbs)) { |
| 935 | |
| 936 | skb = __skb_dequeue(&reclaimed_skbs); |
| 937 | hdr = (struct ieee80211_hdr *)skb->data; |
| 938 | |
| 939 | if (ieee80211_is_data_qos(hdr->frame_control)) |
| 940 | freed++; |
| 941 | else |
| 942 | WARN_ON_ONCE(1); |
| 943 | |
| 944 | if (freed == 0) { |
| 945 | /* this is the first skb we deliver in this batch */ |
| 946 | /* put the rate scaling data there */ |
| 947 | info = IEEE80211_SKB_CB(skb); |
| 948 | memset(&info->status, 0, sizeof(info->status)); |
| 949 | info->flags |= IEEE80211_TX_STAT_ACK; |
| 950 | info->flags |= IEEE80211_TX_STAT_AMPDU; |
| 951 | info->status.ampdu_ack_len = ba_resp->txed_2_done; |
| 952 | info->status.ampdu_len = ba_resp->txed; |
| 953 | iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, |
| 954 | info); |
| 955 | } |
| 956 | |
Emmanuel Grumbach | dfa2bdb | 2011-08-25 23:11:23 -0700 | [diff] [blame] | 957 | info = IEEE80211_SKB_CB(skb); |
| 958 | kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1])); |
| 959 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 960 | ieee80211_tx_status_irqsafe(priv->hw, skb); |
| 961 | } |
| 962 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 963 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 964 | return 0; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 965 | } |