Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 4 | * redistributing this file, you may do so under either license. |
| 5 | * |
| 6 | * GPL LICENSE SUMMARY |
| 7 | * |
Emmanuel Grumbach | 51368bf | 2013-12-30 13:15:54 +0200 | [diff] [blame] | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of version 2 of the GNU General Public License as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, |
| 22 | * USA |
| 23 | * |
| 24 | * The full GNU General Public License is included in this distribution |
Emmanuel Grumbach | 410dc5a | 2013-02-18 09:22:28 +0200 | [diff] [blame] | 25 | * in the file called COPYING. |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 26 | * |
| 27 | * Contact Information: |
| 28 | * Intel Linux Wireless <ilw@linux.intel.com> |
| 29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 30 | * |
| 31 | * BSD LICENSE |
| 32 | * |
Emmanuel Grumbach | 51368bf | 2013-12-30 13:15:54 +0200 | [diff] [blame] | 33 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 34 | * All rights reserved. |
| 35 | * |
| 36 | * Redistribution and use in source and binary forms, with or without |
| 37 | * modification, are permitted provided that the following conditions |
| 38 | * are met: |
| 39 | * |
| 40 | * * Redistributions of source code must retain the above copyright |
| 41 | * notice, this list of conditions and the following disclaimer. |
| 42 | * * Redistributions in binary form must reproduce the above copyright |
| 43 | * notice, this list of conditions and the following disclaimer in |
| 44 | * the documentation and/or other materials provided with the |
| 45 | * distribution. |
| 46 | * * Neither the name Intel Corporation nor the names of its |
| 47 | * contributors may be used to endorse or promote products derived |
| 48 | * from this software without specific prior written permission. |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 61 | * |
| 62 | *****************************************************************************/ |
| 63 | #include <linux/ieee80211.h> |
| 64 | #include <linux/etherdevice.h> |
| 65 | |
| 66 | #include "iwl-trans.h" |
| 67 | #include "iwl-eeprom-parse.h" |
| 68 | #include "mvm.h" |
| 69 | #include "sta.h" |
| 70 | |
| 71 | /* |
| 72 | * Sets most of the Tx cmd's fields |
| 73 | */ |
| 74 | static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, |
| 75 | struct iwl_tx_cmd *tx_cmd, |
| 76 | struct ieee80211_tx_info *info, u8 sta_id) |
| 77 | { |
| 78 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 79 | __le16 fc = hdr->frame_control; |
| 80 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); |
| 81 | u32 len = skb->len + FCS_LEN; |
| 82 | |
| 83 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
| 84 | tx_flags |= TX_CMD_FLG_ACK; |
| 85 | else |
| 86 | tx_flags &= ~TX_CMD_FLG_ACK; |
| 87 | |
| 88 | if (ieee80211_is_probe_resp(fc)) |
| 89 | tx_flags |= TX_CMD_FLG_TSF; |
| 90 | else if (ieee80211_is_back_req(fc)) |
| 91 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; |
| 92 | |
| 93 | /* High prio packet (wrt. BT coex) if it is EAPOL, MCAST or MGMT */ |
Johannes Berg | af61a16 | 2013-07-02 18:09:12 +0200 | [diff] [blame] | 94 | if (info->band == IEEE80211_BAND_2GHZ && |
| 95 | (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO || |
| 96 | is_multicast_ether_addr(hdr->addr1) || |
| 97 | ieee80211_is_back_req(fc) || ieee80211_is_mgmt(fc))) |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 98 | tx_flags |= TX_CMD_FLG_BT_DIS; |
| 99 | |
| 100 | if (ieee80211_has_morefrags(fc)) |
| 101 | tx_flags |= TX_CMD_FLG_MORE_FRAG; |
| 102 | |
| 103 | if (ieee80211_is_data_qos(fc)) { |
| 104 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
| 105 | tx_cmd->tid_tspec = qc[0] & 0xf; |
| 106 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; |
| 107 | } else { |
| 108 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; |
| 109 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) |
| 110 | tx_flags |= TX_CMD_FLG_SEQ_CTL; |
| 111 | else |
| 112 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; |
| 113 | } |
| 114 | |
| 115 | if (ieee80211_is_mgmt(fc)) { |
| 116 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) |
| 117 | tx_cmd->pm_frame_timeout = cpu_to_le16(3); |
| 118 | else |
| 119 | tx_cmd->pm_frame_timeout = cpu_to_le16(2); |
| 120 | |
| 121 | /* The spec allows Action frames in A-MPDU, we don't support |
| 122 | * it |
| 123 | */ |
| 124 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); |
Alexander Bondar | 0f2ed58 | 2013-07-02 19:51:09 +0300 | [diff] [blame] | 125 | } else if (skb->protocol == cpu_to_be16(ETH_P_PAE)) { |
| 126 | tx_cmd->pm_frame_timeout = cpu_to_le16(2); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 127 | } else { |
| 128 | tx_cmd->pm_frame_timeout = 0; |
| 129 | } |
| 130 | |
| 131 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| 132 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; |
| 133 | |
| 134 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
| 135 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) |
| 136 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; |
| 137 | |
| 138 | tx_cmd->driver_txop = 0; |
| 139 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
| 140 | /* Total # bytes to be transmitted */ |
| 141 | tx_cmd->len = cpu_to_le16((u16)skb->len); |
| 142 | tx_cmd->next_frame_len = 0; |
| 143 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); |
| 144 | tx_cmd->sta_id = sta_id; |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * Sets the fields in the Tx cmd that are rate related |
| 149 | */ |
| 150 | static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, |
| 151 | struct iwl_tx_cmd *tx_cmd, |
| 152 | struct ieee80211_tx_info *info, |
| 153 | struct ieee80211_sta *sta, |
| 154 | __le16 fc) |
| 155 | { |
| 156 | u32 rate_flags; |
| 157 | int rate_idx; |
| 158 | u8 rate_plcp; |
| 159 | |
| 160 | /* Set retry limit on RTS packets */ |
| 161 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; |
| 162 | |
| 163 | /* Set retry limit on DATA packets and Probe Responses*/ |
| 164 | if (ieee80211_is_probe_resp(fc)) { |
| 165 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; |
| 166 | tx_cmd->rts_retry_limit = |
| 167 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); |
| 168 | } else if (ieee80211_is_back_req(fc)) { |
| 169 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; |
| 170 | } else { |
| 171 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; |
| 172 | } |
| 173 | |
| 174 | /* |
Eliad Peller | e89044d | 2013-07-16 17:33:26 +0300 | [diff] [blame] | 175 | * for data packets, rate info comes from the table inside the fw. This |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 176 | * table is controlled by LINK_QUALITY commands |
| 177 | */ |
| 178 | |
Emmanuel Grumbach | 9116a36 | 2013-06-02 19:54:01 +0300 | [diff] [blame] | 179 | if (ieee80211_is_data(fc) && sta) { |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 180 | tx_cmd->initial_rate_index = 0; |
| 181 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); |
| 182 | return; |
| 183 | } else if (ieee80211_is_back_req(fc)) { |
Emmanuel Grumbach | 2edc6ec | 2013-06-02 19:49:15 +0300 | [diff] [blame] | 184 | tx_cmd->tx_flags |= |
| 185 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /* HT rate doesn't make sense for a non data frame */ |
| 189 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, |
| 190 | "Got an HT rate for a non data frame 0x%x\n", |
| 191 | info->control.rates[0].flags); |
| 192 | |
| 193 | rate_idx = info->control.rates[0].idx; |
| 194 | /* if the rate isn't a well known legacy rate, take the lowest one */ |
| 195 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) |
| 196 | rate_idx = rate_lowest_index( |
| 197 | &mvm->nvm_data->bands[info->band], sta); |
| 198 | |
| 199 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ |
| 200 | if (info->band == IEEE80211_BAND_5GHZ) |
| 201 | rate_idx += IWL_FIRST_OFDM_RATE; |
| 202 | |
| 203 | /* For 2.4 GHZ band, check that there is no need to remap */ |
| 204 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); |
| 205 | |
| 206 | /* Get PLCP rate for tx_cmd->rate_n_flags */ |
| 207 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); |
| 208 | |
| 209 | mvm->mgmt_last_antenna_idx = |
Emmanuel Grumbach | ff40231 | 2013-04-03 20:10:06 +0300 | [diff] [blame] | 210 | iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw), |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 211 | mvm->mgmt_last_antenna_idx); |
| 212 | rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; |
| 213 | |
| 214 | /* Set CCK flag as needed */ |
| 215 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) |
| 216 | rate_flags |= RATE_MCS_CCK_MSK; |
| 217 | |
| 218 | /* Set the rate in the TX cmd */ |
| 219 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); |
| 220 | } |
| 221 | |
| 222 | /* |
| 223 | * Sets the fields in the Tx cmd that are crypto related |
| 224 | */ |
| 225 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, |
| 226 | struct ieee80211_tx_info *info, |
| 227 | struct iwl_tx_cmd *tx_cmd, |
| 228 | struct sk_buff *skb_frag) |
| 229 | { |
| 230 | struct ieee80211_key_conf *keyconf = info->control.hw_key; |
| 231 | |
| 232 | switch (keyconf->cipher) { |
| 233 | case WLAN_CIPHER_SUITE_CCMP: |
| 234 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
| 235 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); |
| 236 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
| 237 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG); |
| 238 | break; |
| 239 | |
| 240 | case WLAN_CIPHER_SUITE_TKIP: |
| 241 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
| 242 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
| 243 | break; |
| 244 | |
| 245 | case WLAN_CIPHER_SUITE_WEP104: |
| 246 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; |
| 247 | /* fall through */ |
| 248 | case WLAN_CIPHER_SUITE_WEP40: |
| 249 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | |
| 250 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & |
| 251 | TX_CMD_SEC_WEP_KEY_IDX_MSK); |
| 252 | |
| 253 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
| 254 | break; |
| 255 | default: |
Max Stepanov | e36e543 | 2013-08-27 19:56:13 +0300 | [diff] [blame] | 256 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 257 | } |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * Allocates and sets the Tx cmd the driver data pointers in the skb |
| 262 | */ |
| 263 | static struct iwl_device_cmd * |
| 264 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, |
| 265 | struct ieee80211_sta *sta, u8 sta_id) |
| 266 | { |
| 267 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 268 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 269 | struct iwl_device_cmd *dev_cmd; |
| 270 | struct iwl_tx_cmd *tx_cmd; |
| 271 | |
| 272 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); |
| 273 | |
| 274 | if (unlikely(!dev_cmd)) |
| 275 | return NULL; |
| 276 | |
| 277 | memset(dev_cmd, 0, sizeof(*dev_cmd)); |
Emmanuel Grumbach | 3961a61 | 2013-10-22 11:27:55 +0300 | [diff] [blame] | 278 | dev_cmd->hdr.cmd = TX_CMD; |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 279 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
| 280 | |
| 281 | if (info->control.hw_key) |
| 282 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb); |
| 283 | |
| 284 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); |
| 285 | |
| 286 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); |
| 287 | |
| 288 | memset(&info->status, 0, sizeof(info->status)); |
| 289 | |
| 290 | info->driver_data[0] = NULL; |
| 291 | info->driver_data[1] = dev_cmd; |
| 292 | |
| 293 | return dev_cmd; |
| 294 | } |
| 295 | |
| 296 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) |
| 297 | { |
| 298 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 299 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 300 | struct iwl_device_cmd *dev_cmd; |
| 301 | struct iwl_tx_cmd *tx_cmd; |
| 302 | u8 sta_id; |
| 303 | |
| 304 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) |
| 305 | return -1; |
| 306 | |
| 307 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
| 308 | (!info->control.vif || |
| 309 | info->hw_queue != info->control.vif->cab_queue))) |
| 310 | return -1; |
| 311 | |
| 312 | /* |
| 313 | * If the interface on which frame is sent is the P2P_DEVICE |
| 314 | * or an AP/GO interface use the broadcast station associated |
| 315 | * with it; otherwise use the AUX station. |
| 316 | */ |
| 317 | if (info->control.vif && |
| 318 | (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || |
| 319 | info->control.vif->type == NL80211_IFTYPE_AP)) { |
| 320 | struct iwl_mvm_vif *mvmvif = |
| 321 | iwl_mvm_vif_from_mac80211(info->control.vif); |
| 322 | sta_id = mvmvif->bcast_sta.sta_id; |
| 323 | } else { |
| 324 | sta_id = mvm->aux_sta.sta_id; |
| 325 | } |
| 326 | |
| 327 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); |
| 328 | |
| 329 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id); |
| 330 | if (!dev_cmd) |
| 331 | return -1; |
| 332 | |
| 333 | /* From now on, we cannot access info->control */ |
| 334 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
| 335 | |
| 336 | /* Copy MAC header from skb into command buffer */ |
| 337 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control)); |
| 338 | |
| 339 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { |
| 340 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); |
| 341 | return -1; |
| 342 | } |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Sets the fields in the Tx cmd that are crypto related |
| 349 | */ |
| 350 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, |
| 351 | struct ieee80211_sta *sta) |
| 352 | { |
| 353 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 354 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 355 | struct iwl_mvm_sta *mvmsta; |
| 356 | struct iwl_device_cmd *dev_cmd; |
| 357 | struct iwl_tx_cmd *tx_cmd; |
| 358 | __le16 fc; |
| 359 | u16 seq_number = 0; |
| 360 | u8 tid = IWL_MAX_TID_COUNT; |
| 361 | u8 txq_id = info->hw_queue; |
| 362 | bool is_data_qos = false, is_ampdu = false; |
| 363 | |
Johannes Berg | 5b577a9 | 2013-11-14 18:20:04 +0100 | [diff] [blame] | 364 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 365 | fc = hdr->frame_control; |
| 366 | |
| 367 | if (WARN_ON_ONCE(!mvmsta)) |
| 368 | return -1; |
| 369 | |
Emmanuel Grumbach | 881acd8 | 2013-03-19 16:16:00 +0200 | [diff] [blame] | 370 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 371 | return -1; |
| 372 | |
| 373 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id); |
| 374 | if (!dev_cmd) |
| 375 | goto drop; |
| 376 | |
| 377 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
| 378 | /* From now on, we cannot access info->control */ |
| 379 | |
Johannes Berg | 3e56ead | 2013-02-15 22:23:18 +0100 | [diff] [blame] | 380 | /* |
| 381 | * we handle that entirely ourselves -- for uAPSD the firmware |
| 382 | * will always send a notification, and for PS-Poll responses |
| 383 | * we'll notify mac80211 when getting frame status |
| 384 | */ |
| 385 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; |
| 386 | |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 387 | spin_lock(&mvmsta->lock); |
| 388 | |
| 389 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { |
| 390 | u8 *qc = NULL; |
| 391 | qc = ieee80211_get_qos_ctl(hdr); |
| 392 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; |
| 393 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) |
| 394 | goto drop_unlock_sta; |
| 395 | |
| 396 | seq_number = mvmsta->tid_data[tid].seq_number; |
| 397 | seq_number &= IEEE80211_SCTL_SEQ; |
| 398 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 399 | hdr->seq_ctrl |= cpu_to_le16(seq_number); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 400 | is_data_qos = true; |
| 401 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; |
| 402 | } |
| 403 | |
| 404 | /* Copy MAC header from skb into command buffer */ |
| 405 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc)); |
| 406 | |
| 407 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); |
| 408 | |
| 409 | if (is_ampdu) { |
| 410 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) |
| 411 | goto drop_unlock_sta; |
| 412 | txq_id = mvmsta->tid_data[tid].txq_id; |
| 413 | } |
| 414 | |
| 415 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, |
Eliad Peller | cf9d118 | 2013-12-31 18:54:06 +0200 | [diff] [blame] | 416 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 417 | |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 418 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
| 419 | goto drop_unlock_sta; |
| 420 | |
| 421 | if (is_data_qos && !ieee80211_has_morefrags(fc)) |
Eliad Peller | cf9d118 | 2013-12-31 18:54:06 +0200 | [diff] [blame] | 422 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 423 | |
| 424 | spin_unlock(&mvmsta->lock); |
| 425 | |
Eytan Lifshitz | 19e737c | 2013-09-09 13:30:15 +0200 | [diff] [blame] | 426 | if (txq_id < mvm->first_agg_queue) |
Emmanuel Grumbach | e3d4bc8 | 2013-05-07 14:08:24 +0300 | [diff] [blame] | 427 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 428 | |
| 429 | return 0; |
| 430 | |
| 431 | drop_unlock_sta: |
| 432 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); |
| 433 | spin_unlock(&mvmsta->lock); |
| 434 | drop: |
| 435 | return -1; |
| 436 | } |
| 437 | |
| 438 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, |
| 439 | struct ieee80211_sta *sta, u8 tid) |
| 440 | { |
Johannes Berg | 5b577a9 | 2013-11-14 18:20:04 +0100 | [diff] [blame] | 441 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 442 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
| 443 | struct ieee80211_vif *vif = mvmsta->vif; |
| 444 | |
| 445 | lockdep_assert_held(&mvmsta->lock); |
| 446 | |
Johannes Berg | 3e56ead | 2013-02-15 22:23:18 +0100 | [diff] [blame] | 447 | if ((tid_data->state == IWL_AGG_ON || |
| 448 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && |
| 449 | iwl_mvm_tid_queued(tid_data) == 0) { |
| 450 | /* |
| 451 | * Now that this aggregation queue is empty tell mac80211 so it |
| 452 | * knows we no longer have frames buffered for the station on |
| 453 | * this TID (for the TIM bitmap calculation.) |
| 454 | */ |
| 455 | ieee80211_sta_set_buffered(sta, tid, false); |
| 456 | } |
| 457 | |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 458 | if (tid_data->ssn != tid_data->next_reclaimed) |
| 459 | return; |
| 460 | |
| 461 | switch (tid_data->state) { |
| 462 | case IWL_EMPTYING_HW_QUEUE_ADDBA: |
| 463 | IWL_DEBUG_TX_QUEUES(mvm, |
| 464 | "Can continue addBA flow ssn = next_recl = %d\n", |
| 465 | tid_data->next_reclaimed); |
| 466 | tid_data->state = IWL_AGG_STARTING; |
| 467 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
| 468 | break; |
| 469 | |
| 470 | case IWL_EMPTYING_HW_QUEUE_DELBA: |
| 471 | IWL_DEBUG_TX_QUEUES(mvm, |
| 472 | "Can continue DELBA flow ssn = next_recl = %d\n", |
| 473 | tid_data->next_reclaimed); |
| 474 | iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); |
| 475 | tid_data->state = IWL_AGG_OFF; |
| 476 | /* |
| 477 | * we can't hold the mutex - but since we are after a sequence |
| 478 | * point (call to iwl_trans_txq_disable), so we don't even need |
| 479 | * a memory barrier. |
| 480 | */ |
| 481 | mvm->queue_to_mac80211[tid_data->txq_id] = |
| 482 | IWL_INVALID_MAC80211_QUEUE; |
| 483 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
| 484 | break; |
| 485 | |
| 486 | default: |
| 487 | break; |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 492 | const char *iwl_mvm_get_tx_fail_reason(u32 status) |
| 493 | { |
| 494 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x |
| 495 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x |
| 496 | |
| 497 | switch (status & TX_STATUS_MSK) { |
| 498 | case TX_STATUS_SUCCESS: |
| 499 | return "SUCCESS"; |
| 500 | TX_STATUS_POSTPONE(DELAY); |
| 501 | TX_STATUS_POSTPONE(FEW_BYTES); |
| 502 | TX_STATUS_POSTPONE(BT_PRIO); |
| 503 | TX_STATUS_POSTPONE(QUIET_PERIOD); |
| 504 | TX_STATUS_POSTPONE(CALC_TTAK); |
| 505 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); |
| 506 | TX_STATUS_FAIL(SHORT_LIMIT); |
| 507 | TX_STATUS_FAIL(LONG_LIMIT); |
| 508 | TX_STATUS_FAIL(UNDERRUN); |
| 509 | TX_STATUS_FAIL(DRAIN_FLOW); |
| 510 | TX_STATUS_FAIL(RFKILL_FLUSH); |
| 511 | TX_STATUS_FAIL(LIFE_EXPIRE); |
| 512 | TX_STATUS_FAIL(DEST_PS); |
| 513 | TX_STATUS_FAIL(HOST_ABORTED); |
| 514 | TX_STATUS_FAIL(BT_RETRY); |
| 515 | TX_STATUS_FAIL(STA_INVALID); |
| 516 | TX_STATUS_FAIL(FRAG_DROPPED); |
| 517 | TX_STATUS_FAIL(TID_DISABLE); |
| 518 | TX_STATUS_FAIL(FIFO_FLUSHED); |
| 519 | TX_STATUS_FAIL(SMALL_CF_POLL); |
| 520 | TX_STATUS_FAIL(FW_DROP); |
| 521 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); |
| 522 | } |
| 523 | |
| 524 | return "UNKNOWN"; |
| 525 | |
| 526 | #undef TX_STATUS_FAIL |
| 527 | #undef TX_STATUS_POSTPONE |
| 528 | } |
| 529 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
| 530 | |
Eyal Shapira | d310e40 | 2013-08-11 18:43:47 +0300 | [diff] [blame] | 531 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
| 532 | enum ieee80211_band band, |
| 533 | struct ieee80211_tx_rate *r) |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 534 | { |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 535 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
| 536 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; |
| 537 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { |
| 538 | case RATE_MCS_CHAN_WIDTH_20: |
| 539 | break; |
| 540 | case RATE_MCS_CHAN_WIDTH_40: |
| 541 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
| 542 | break; |
| 543 | case RATE_MCS_CHAN_WIDTH_80: |
| 544 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; |
| 545 | break; |
| 546 | case RATE_MCS_CHAN_WIDTH_160: |
| 547 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; |
| 548 | break; |
| 549 | } |
| 550 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
| 551 | r->flags |= IEEE80211_TX_RC_SHORT_GI; |
| 552 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
| 553 | r->flags |= IEEE80211_TX_RC_MCS; |
| 554 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; |
| 555 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
| 556 | ieee80211_rate_set_vht( |
| 557 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, |
| 558 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> |
| 559 | RATE_VHT_MCS_NSS_POS) + 1); |
| 560 | r->flags |= IEEE80211_TX_RC_VHT_MCS; |
| 561 | } else { |
| 562 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, |
Eyal Shapira | d310e40 | 2013-08-11 18:43:47 +0300 | [diff] [blame] | 563 | band); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 564 | } |
| 565 | } |
| 566 | |
Eyal Shapira | d310e40 | 2013-08-11 18:43:47 +0300 | [diff] [blame] | 567 | /** |
| 568 | * translate ucode response to mac80211 tx status control values |
| 569 | */ |
| 570 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, |
| 571 | struct ieee80211_tx_info *info) |
| 572 | { |
| 573 | struct ieee80211_tx_rate *r = &info->status.rates[0]; |
| 574 | |
| 575 | info->status.antenna = |
| 576 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); |
| 577 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); |
| 578 | } |
| 579 | |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 580 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
| 581 | struct iwl_rx_packet *pkt) |
| 582 | { |
| 583 | struct ieee80211_sta *sta; |
| 584 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); |
| 585 | int txq_id = SEQ_TO_QUEUE(sequence); |
| 586 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; |
| 587 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); |
| 588 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); |
| 589 | u32 status = le16_to_cpu(tx_resp->status.status); |
| 590 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); |
| 591 | struct iwl_mvm_sta *mvmsta; |
| 592 | struct sk_buff_head skbs; |
| 593 | u8 skb_freed = 0; |
| 594 | u16 next_reclaimed, seq_ctl; |
| 595 | |
| 596 | __skb_queue_head_init(&skbs); |
| 597 | |
| 598 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); |
| 599 | |
| 600 | /* we can free until ssn % q.n_bd not inclusive */ |
| 601 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); |
| 602 | |
| 603 | while (!skb_queue_empty(&skbs)) { |
| 604 | struct sk_buff *skb = __skb_dequeue(&skbs); |
| 605 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 606 | |
| 607 | skb_freed++; |
| 608 | |
| 609 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
| 610 | |
| 611 | memset(&info->status, 0, sizeof(info->status)); |
| 612 | |
| 613 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
| 614 | |
| 615 | /* inform mac80211 about what happened with the frame */ |
| 616 | switch (status & TX_STATUS_MSK) { |
| 617 | case TX_STATUS_SUCCESS: |
| 618 | case TX_STATUS_DIRECT_DONE: |
| 619 | info->flags |= IEEE80211_TX_STAT_ACK; |
| 620 | break; |
| 621 | case TX_STATUS_FAIL_DEST_PS: |
| 622 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
| 623 | break; |
| 624 | default: |
| 625 | break; |
| 626 | } |
| 627 | |
| 628 | info->status.rates[0].count = tx_resp->failure_frame + 1; |
Eyal Shapira | d310e40 | 2013-08-11 18:43:47 +0300 | [diff] [blame] | 629 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
| 630 | info); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 631 | |
| 632 | /* Single frame failure in an AMPDU queue => send BAR */ |
Eytan Lifshitz | 19e737c | 2013-09-09 13:30:15 +0200 | [diff] [blame] | 633 | if (txq_id >= mvm->first_agg_queue && |
Emmanuel Grumbach | 2470b36 | 2013-03-03 14:35:03 +0200 | [diff] [blame] | 634 | !(info->flags & IEEE80211_TX_STAT_ACK)) |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 635 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 636 | |
Emmanuel Grumbach | ebea2f3 | 2013-06-13 10:07:47 +0300 | [diff] [blame] | 637 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
| 638 | if (status != TX_STATUS_SUCCESS) { |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 639 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 640 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); |
| 641 | } |
| 642 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 643 | ieee80211_tx_status_ni(mvm->hw, skb); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 644 | } |
| 645 | |
Eytan Lifshitz | 19e737c | 2013-09-09 13:30:15 +0200 | [diff] [blame] | 646 | if (txq_id >= mvm->first_agg_queue) { |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 647 | /* If this is an aggregation queue, we use the ssn since: |
| 648 | * ssn = wifi seq_num % 256. |
| 649 | * The seq_ctl is the sequence control of the packet to which |
| 650 | * this Tx response relates. But if there is a hole in the |
| 651 | * bitmap of the BA we received, this Tx response may allow to |
| 652 | * reclaim the hole and all the subsequent packets that were |
| 653 | * already acked. In that case, seq_ctl != ssn, and the next |
| 654 | * packet to be reclaimed will be ssn and not seq_ctl. In that |
| 655 | * case, several packets will be reclaimed even if |
| 656 | * frame_count = 1. |
| 657 | * |
| 658 | * The ssn is the index (% 256) of the latest packet that has |
| 659 | * treated (acked / dropped) + 1. |
| 660 | */ |
| 661 | next_reclaimed = ssn; |
| 662 | } else { |
| 663 | /* The next packet to be reclaimed is the one after this one */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 664 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | IWL_DEBUG_TX_REPLY(mvm, |
Emmanuel Grumbach | 8c6e83d | 2013-03-20 17:12:46 +0200 | [diff] [blame] | 668 | "TXQ %d status %s (0x%08x)\n", |
| 669 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); |
| 670 | |
| 671 | IWL_DEBUG_TX_REPLY(mvm, |
| 672 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", |
| 673 | le32_to_cpu(tx_resp->initial_rate), |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 674 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
| 675 | ssn, next_reclaimed, seq_ctl); |
| 676 | |
| 677 | rcu_read_lock(); |
| 678 | |
| 679 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |
| 680 | |
| 681 | if (!IS_ERR_OR_NULL(sta)) { |
Johannes Berg | 5b577a9 | 2013-11-14 18:20:04 +0100 | [diff] [blame] | 682 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 683 | |
| 684 | if (tid != IWL_TID_NON_QOS) { |
| 685 | struct iwl_mvm_tid_data *tid_data = |
| 686 | &mvmsta->tid_data[tid]; |
| 687 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 688 | spin_lock_bh(&mvmsta->lock); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 689 | tid_data->next_reclaimed = next_reclaimed; |
| 690 | IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", |
| 691 | next_reclaimed); |
| 692 | iwl_mvm_check_ratid_empty(mvm, sta, tid); |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 693 | spin_unlock_bh(&mvmsta->lock); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 694 | } |
Johannes Berg | 3e56ead | 2013-02-15 22:23:18 +0100 | [diff] [blame] | 695 | |
| 696 | if (mvmsta->next_status_eosp) { |
| 697 | mvmsta->next_status_eosp = false; |
| 698 | ieee80211_sta_eosp(sta); |
| 699 | } |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 700 | } else { |
| 701 | sta = NULL; |
| 702 | mvmsta = NULL; |
| 703 | } |
| 704 | |
| 705 | /* |
| 706 | * If the txq is not an AMPDU queue, there is no chance we freed |
| 707 | * several skbs. Check that out... |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 708 | */ |
Eytan Lifshitz | 19e737c | 2013-09-09 13:30:15 +0200 | [diff] [blame] | 709 | if (txq_id < mvm->first_agg_queue && !WARN_ON(skb_freed > 1) && |
Emmanuel Grumbach | e3d4bc8 | 2013-05-07 14:08:24 +0300 | [diff] [blame] | 710 | atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) { |
| 711 | if (mvmsta) { |
| 712 | /* |
| 713 | * If there are no pending frames for this STA, notify |
| 714 | * mac80211 that this station can go to sleep in its |
| 715 | * STA table. |
| 716 | */ |
| 717 | if (mvmsta->vif->type == NL80211_IFTYPE_AP) |
| 718 | ieee80211_sta_block_awake(mvm->hw, sta, false); |
| 719 | /* |
| 720 | * We might very well have taken mvmsta pointer while |
| 721 | * the station was being removed. The remove flow might |
| 722 | * have seen a pending_frame (because we didn't take |
| 723 | * the lock) even if now the queues are drained. So make |
| 724 | * really sure now that this the station is not being |
| 725 | * removed. If it is, run the drain worker to remove it. |
| 726 | */ |
| 727 | spin_lock_bh(&mvmsta->lock); |
| 728 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |
Emmanuel Grumbach | 2775613 | 2014-01-02 10:01:46 +0200 | [diff] [blame] | 729 | if (!sta || PTR_ERR(sta) == -EBUSY) { |
Emmanuel Grumbach | e3d4bc8 | 2013-05-07 14:08:24 +0300 | [diff] [blame] | 730 | /* |
| 731 | * Station disappeared in the meantime: |
| 732 | * so we are draining. |
| 733 | */ |
| 734 | set_bit(sta_id, mvm->sta_drained); |
| 735 | schedule_work(&mvm->sta_drained_wk); |
| 736 | } |
| 737 | spin_unlock_bh(&mvmsta->lock); |
Emmanuel Grumbach | 2775613 | 2014-01-02 10:01:46 +0200 | [diff] [blame] | 738 | } else if (!mvmsta && PTR_ERR(sta) == -EBUSY) { |
Emmanuel Grumbach | e3d4bc8 | 2013-05-07 14:08:24 +0300 | [diff] [blame] | 739 | /* Tx response without STA, so we are draining */ |
| 740 | set_bit(sta_id, mvm->sta_drained); |
| 741 | schedule_work(&mvm->sta_drained_wk); |
| 742 | } |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 743 | } |
| 744 | |
| 745 | rcu_read_unlock(); |
| 746 | } |
| 747 | |
| 748 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 749 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x |
| 750 | static const char *iwl_get_agg_tx_status(u16 status) |
| 751 | { |
| 752 | switch (status & AGG_TX_STATE_STATUS_MSK) { |
| 753 | AGG_TX_STATE_(TRANSMITTED); |
| 754 | AGG_TX_STATE_(UNDERRUN); |
| 755 | AGG_TX_STATE_(BT_PRIO); |
| 756 | AGG_TX_STATE_(FEW_BYTES); |
| 757 | AGG_TX_STATE_(ABORT); |
| 758 | AGG_TX_STATE_(LAST_SENT_TTL); |
| 759 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); |
| 760 | AGG_TX_STATE_(LAST_SENT_BT_KILL); |
| 761 | AGG_TX_STATE_(SCD_QUERY); |
| 762 | AGG_TX_STATE_(TEST_BAD_CRC32); |
| 763 | AGG_TX_STATE_(RESPONSE); |
| 764 | AGG_TX_STATE_(DUMP_TX); |
| 765 | AGG_TX_STATE_(DELAY_TX); |
| 766 | } |
| 767 | |
| 768 | return "UNKNOWN"; |
| 769 | } |
| 770 | |
| 771 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, |
| 772 | struct iwl_rx_packet *pkt) |
| 773 | { |
| 774 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; |
| 775 | struct agg_tx_status *frame_status = &tx_resp->status; |
| 776 | int i; |
| 777 | |
| 778 | for (i = 0; i < tx_resp->frame_count; i++) { |
| 779 | u16 fstatus = le16_to_cpu(frame_status[i].status); |
| 780 | |
| 781 | IWL_DEBUG_TX_REPLY(mvm, |
| 782 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", |
| 783 | iwl_get_agg_tx_status(fstatus), |
| 784 | fstatus & AGG_TX_STATE_STATUS_MSK, |
| 785 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> |
| 786 | AGG_TX_STATE_TRY_CNT_POS, |
| 787 | le16_to_cpu(frame_status[i].sequence)); |
| 788 | } |
| 789 | } |
| 790 | #else |
| 791 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, |
| 792 | struct iwl_rx_packet *pkt) |
| 793 | {} |
| 794 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
| 795 | |
| 796 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, |
| 797 | struct iwl_rx_packet *pkt) |
| 798 | { |
| 799 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; |
| 800 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); |
| 801 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); |
| 802 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); |
| 803 | struct ieee80211_sta *sta; |
| 804 | |
Eytan Lifshitz | 19e737c | 2013-09-09 13:30:15 +0200 | [diff] [blame] | 805 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 806 | return; |
| 807 | |
| 808 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) |
| 809 | return; |
| 810 | |
| 811 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); |
| 812 | |
| 813 | rcu_read_lock(); |
| 814 | |
| 815 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |
| 816 | |
| 817 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { |
Johannes Berg | 5b577a9 | 2013-11-14 18:20:04 +0100 | [diff] [blame] | 818 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 819 | mvmsta->tid_data[tid].rate_n_flags = |
| 820 | le32_to_cpu(tx_resp->initial_rate); |
| 821 | } |
| 822 | |
| 823 | rcu_read_unlock(); |
| 824 | } |
| 825 | |
| 826 | int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, |
| 827 | struct iwl_device_cmd *cmd) |
| 828 | { |
| 829 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| 830 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; |
| 831 | |
| 832 | if (tx_resp->frame_count == 1) |
| 833 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); |
| 834 | else |
| 835 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); |
| 836 | |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, |
| 841 | struct iwl_device_cmd *cmd) |
| 842 | { |
| 843 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| 844 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; |
| 845 | struct sk_buff_head reclaimed_skbs; |
| 846 | struct iwl_mvm_tid_data *tid_data; |
| 847 | struct ieee80211_tx_info *info; |
| 848 | struct ieee80211_sta *sta; |
| 849 | struct iwl_mvm_sta *mvmsta; |
| 850 | struct ieee80211_hdr *hdr; |
| 851 | struct sk_buff *skb; |
| 852 | int sta_id, tid, freed; |
| 853 | |
| 854 | /* "flow" corresponds to Tx queue */ |
| 855 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); |
| 856 | |
| 857 | /* "ssn" is start of block-ack Tx window, corresponds to index |
| 858 | * (in Tx queue's circular buffer) of first TFD/frame in window */ |
| 859 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); |
| 860 | |
| 861 | sta_id = ba_notif->sta_id; |
| 862 | tid = ba_notif->tid; |
| 863 | |
| 864 | rcu_read_lock(); |
| 865 | |
| 866 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |
| 867 | |
| 868 | /* Reclaiming frames for a station that has been deleted ? */ |
| 869 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { |
| 870 | rcu_read_unlock(); |
| 871 | return 0; |
| 872 | } |
| 873 | |
Johannes Berg | 5b577a9 | 2013-11-14 18:20:04 +0100 | [diff] [blame] | 874 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 875 | tid_data = &mvmsta->tid_data[tid]; |
| 876 | |
| 877 | if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d", |
| 878 | tid_data->txq_id, tid, scd_flow)) { |
| 879 | rcu_read_unlock(); |
| 880 | return 0; |
| 881 | } |
| 882 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 883 | spin_lock_bh(&mvmsta->lock); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 884 | |
| 885 | __skb_queue_head_init(&reclaimed_skbs); |
| 886 | |
| 887 | /* |
| 888 | * Release all TFDs before the SSN, i.e. all TFDs in front of |
| 889 | * block-ack window (we assume that they've been successfully |
| 890 | * transmitted ... if not, it's too late anyway). |
| 891 | */ |
| 892 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, |
| 893 | &reclaimed_skbs); |
| 894 | |
| 895 | IWL_DEBUG_TX_REPLY(mvm, |
| 896 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", |
| 897 | (u8 *)&ba_notif->sta_addr_lo32, |
| 898 | ba_notif->sta_id); |
| 899 | IWL_DEBUG_TX_REPLY(mvm, |
| 900 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", |
| 901 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), |
| 902 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), |
| 903 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, |
| 904 | ba_notif->txed_2_done); |
| 905 | |
| 906 | tid_data->next_reclaimed = ba_resp_scd_ssn; |
| 907 | |
| 908 | iwl_mvm_check_ratid_empty(mvm, sta, tid); |
| 909 | |
| 910 | freed = 0; |
| 911 | |
| 912 | skb_queue_walk(&reclaimed_skbs, skb) { |
| 913 | hdr = (struct ieee80211_hdr *)skb->data; |
| 914 | |
| 915 | if (ieee80211_is_data_qos(hdr->frame_control)) |
| 916 | freed++; |
| 917 | else |
| 918 | WARN_ON_ONCE(1); |
| 919 | |
| 920 | info = IEEE80211_SKB_CB(skb); |
| 921 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
| 922 | |
| 923 | if (freed == 1) { |
| 924 | /* this is the first skb we deliver in this batch */ |
| 925 | /* put the rate scaling data there */ |
| 926 | info = IEEE80211_SKB_CB(skb); |
| 927 | memset(&info->status, 0, sizeof(info->status)); |
| 928 | info->flags |= IEEE80211_TX_STAT_ACK; |
| 929 | info->flags |= IEEE80211_TX_STAT_AMPDU; |
| 930 | info->status.ampdu_ack_len = ba_notif->txed_2_done; |
| 931 | info->status.ampdu_len = ba_notif->txed; |
Eyal Shapira | d310e40 | 2013-08-11 18:43:47 +0300 | [diff] [blame] | 932 | iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, |
| 933 | info); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 934 | } |
| 935 | } |
| 936 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 937 | spin_unlock_bh(&mvmsta->lock); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 938 | |
| 939 | rcu_read_unlock(); |
| 940 | |
| 941 | while (!skb_queue_empty(&reclaimed_skbs)) { |
| 942 | skb = __skb_dequeue(&reclaimed_skbs); |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 943 | ieee80211_tx_status_ni(mvm->hw, skb); |
Johannes Berg | 8ca151b | 2013-01-24 14:25:36 +0100 | [diff] [blame] | 944 | } |
| 945 | |
| 946 | return 0; |
| 947 | } |
| 948 | |
| 949 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync) |
| 950 | { |
| 951 | int ret; |
| 952 | struct iwl_tx_path_flush_cmd flush_cmd = { |
| 953 | .queues_ctl = cpu_to_le32(tfd_msk), |
| 954 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), |
| 955 | }; |
| 956 | |
| 957 | u32 flags = sync ? CMD_SYNC : CMD_ASYNC; |
| 958 | |
| 959 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, |
| 960 | sizeof(flush_cmd), &flush_cmd); |
| 961 | if (ret) |
| 962 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); |
| 963 | return ret; |
| 964 | } |