blob: c46d50dfbc7c01187035c049f8b6a78bf95719c7 [file] [log] [blame]
Wey-Yi Guyb305a082010-03-16 17:41:22 -07001/******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
Wey-Yi Guy901069c2011-04-05 09:42:00 -07005 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
Wey-Yi Guyb305a082010-03-16 17:41:22 -07006 *
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 Grumbacha0eaad72011-08-25 23:11:00 -070034#include <linux/ieee80211.h>
Wey-Yi Guyb305a082010-03-16 17:41:22 -070035
36#include "iwl-dev.h"
37#include "iwl-core.h"
Wey-Yi Guyb305a082010-03-16 17:41:22 -070038#include "iwl-io.h"
Wey-Yi Guy19e6cda2010-03-16 17:41:23 -070039#include "iwl-agn-hw.h"
Wey-Yi Guy8d801082010-03-17 13:34:36 -070040#include "iwl-agn.h"
Emmanuel Grumbach47c1b492011-07-03 11:22:15 +030041#include "iwl-trans.h"
Wey-Yi Guyb305a082010-03-16 17:41:22 -070042
Don Fry5c3d29f2011-07-08 08:46:29 -070043static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
44 struct ieee80211_tx_info *info,
45 __le16 fc, __le32 *tx_flags)
46{
47 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
48 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
49 info->flags & IEEE80211_TX_CTL_AMPDU)
50 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
51}
52
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070053/*
54 * handle build REPLY_TX command notification.
55 */
56static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
Johannes Bergc6baf7f2011-07-23 10:24:47 -070057 struct sk_buff *skb,
58 struct iwl_tx_cmd *tx_cmd,
59 struct ieee80211_tx_info *info,
60 struct ieee80211_hdr *hdr, u8 sta_id)
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070061{
62 __le16 fc = hdr->frame_control;
63 __le32 tx_flags = tx_cmd->tx_flags;
64
65 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070066
Johannes Berg2c2def12011-07-07 05:11:51 -070067 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
68 tx_flags |= TX_CMD_FLG_ACK_MSK;
69 else
70 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
71
72 if (ieee80211_is_probe_resp(fc))
73 tx_flags |= TX_CMD_FLG_TSF_MSK;
74 else if (ieee80211_is_back_req(fc))
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070075 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
Johannes Bergd44ae692010-08-23 07:56:56 -070076 else if (info->band == IEEE80211_BAND_2GHZ &&
Don Fry38622412011-12-16 07:07:36 -080077 cfg(priv)->bt_params &&
78 cfg(priv)->bt_params->advanced_bt_coexist &&
Johannes Bergd44ae692010-08-23 07:56:56 -070079 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
80 ieee80211_is_reassoc_req(fc) ||
81 skb->protocol == cpu_to_be16(ETH_P_PAE)))
82 tx_flags |= TX_CMD_FLG_IGNORE_BT;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070083
84
Johannes Bergc6baf7f2011-07-23 10:24:47 -070085 tx_cmd->sta_id = sta_id;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070086 if (ieee80211_has_morefrags(fc))
87 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
88
89 if (ieee80211_is_data_qos(fc)) {
90 u8 *qc = ieee80211_get_qos_ctl(hdr);
91 tx_cmd->tid_tspec = qc[0] & 0xf;
92 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
93 } else {
Wey-Yi Guy123877b2011-12-08 15:52:00 -080094 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
95 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
96 else
97 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -070098 }
99
Don Fry5c3d29f2011-07-08 08:46:29 -0700100 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700101
102 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
103 if (ieee80211_is_mgmt(fc)) {
104 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
105 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
106 else
107 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
108 } else {
109 tx_cmd->timeout.pm_frame_timeout = 0;
110 }
111
112 tx_cmd->driver_txop = 0;
113 tx_cmd->tx_flags = tx_flags;
114 tx_cmd->next_frame_len = 0;
115}
116
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700117static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
Johannes Bergc6baf7f2011-07-23 10:24:47 -0700118 struct iwl_tx_cmd *tx_cmd,
119 struct ieee80211_tx_info *info,
120 __le16 fc)
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700121{
122 u32 rate_flags;
123 int rate_idx;
124 u8 rts_retry_limit;
125 u8 data_retry_limit;
126 u8 rate_plcp;
127
Wey-Yi Guyf3129b72011-10-10 07:27:06 -0700128 if (priv->shrd->wowlan) {
129 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
130 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
131 } else {
132 /* Set retry limit on RTS packets */
133 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
Wey-Yi Guy78558cb2011-10-10 07:26:59 -0700134
Wey-Yi Guyf3129b72011-10-10 07:27:06 -0700135 /* Set retry limit on DATA packets and Probe Responses*/
136 if (ieee80211_is_probe_resp(fc)) {
137 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
138 rts_retry_limit =
139 min(data_retry_limit, rts_retry_limit);
140 } else if (ieee80211_is_back_req(fc))
141 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
142 else
143 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
144 }
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700145
Wey-Yi Guy78558cb2011-10-10 07:26:59 -0700146 tx_cmd->data_retry_limit = data_retry_limit;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700147 tx_cmd->rts_retry_limit = rts_retry_limit;
148
149 /* DATA packets will use the uCode station table for rate/antenna
150 * selection */
151 if (ieee80211_is_data(fc)) {
152 tx_cmd->initial_rate_index = 0;
153 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
Wey-Yi Guy5ef15cc2011-11-30 13:24:06 -0800154#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
Wey-Yi Guy4e308112011-07-08 08:46:28 -0700155 if (priv->tm_fixed_rate) {
156 /*
157 * rate overwrite by testmode
158 * we not only send lq command to change rate
159 * we also re-enforce per data pkt base.
160 */
161 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
162 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
163 sizeof(tx_cmd->rate_n_flags));
164 }
Wey-Yi Guyc10e2c12011-07-13 11:13:46 -0700165#endif
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700166 return;
Wey-Yi Guyb8deb492011-12-02 08:09:10 -0800167 } else if (ieee80211_is_back_req(fc))
168 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700169
170 /**
171 * If the current TX rate stored in mac80211 has the MCS bit set, it's
172 * not really a TX rate. Thus, we use the lowest supported rate for
173 * this band. Also use the lowest supported rate if the stored rate
174 * index is invalid.
175 */
176 rate_idx = info->control.rates[0].idx;
177 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
178 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
179 rate_idx = rate_lowest_index(&priv->bands[info->band],
180 info->control.sta);
181 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
182 if (info->band == IEEE80211_BAND_5GHZ)
183 rate_idx += IWL_FIRST_OFDM_RATE;
184 /* Get PLCP rate for tx_cmd->rate_n_flags */
185 rate_plcp = iwl_rates[rate_idx].plcp;
186 /* Zero out flags for this packet */
187 rate_flags = 0;
188
189 /* Set CCK flag as needed */
190 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
191 rate_flags |= RATE_MCS_CCK_MSK;
192
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700193 /* Set up antennas */
Don Fry38622412011-12-16 07:07:36 -0800194 if (cfg(priv)->bt_params &&
195 cfg(priv)->bt_params->advanced_bt_coexist &&
Wey-Yi Guy7cb1b082010-10-06 08:10:00 -0700196 priv->bt_full_concurrent) {
Wey-Yi Guybee008b2010-08-23 07:57:04 -0700197 /* operated as 1x1 in full concurrency mode */
198 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
Emmanuel Grumbachd6189122011-08-25 23:10:39 -0700199 first_antenna(hw_params(priv).valid_tx_ant));
Wey-Yi Guybee008b2010-08-23 07:57:04 -0700200 } else
201 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
Emmanuel Grumbachd6189122011-08-25 23:10:39 -0700202 hw_params(priv).valid_tx_ant);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700203 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
204
205 /* Set the rate in the TX cmd */
206 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
207}
208
209static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
210 struct ieee80211_tx_info *info,
211 struct iwl_tx_cmd *tx_cmd,
212 struct sk_buff *skb_frag,
213 int sta_id)
214{
215 struct ieee80211_key_conf *keyconf = info->control.hw_key;
216
Johannes Berg97359d12010-08-10 09:46:38 +0200217 switch (keyconf->cipher) {
218 case WLAN_CIPHER_SUITE_CCMP:
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700219 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
220 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
221 if (info->flags & IEEE80211_TX_CTL_AMPDU)
222 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
223 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
224 break;
225
Johannes Berg97359d12010-08-10 09:46:38 +0200226 case WLAN_CIPHER_SUITE_TKIP:
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700227 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
Johannes Berg523b02e2011-07-07 22:28:01 +0200228 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700229 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
230 break;
231
Johannes Berg97359d12010-08-10 09:46:38 +0200232 case WLAN_CIPHER_SUITE_WEP104:
233 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
234 /* fall through */
235 case WLAN_CIPHER_SUITE_WEP40:
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700236 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
237 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
238
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700239 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
240
241 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
242 "with key %d\n", keyconf->keyidx);
243 break;
244
245 default:
Johannes Berg97359d12010-08-10 09:46:38 +0200246 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700247 break;
248 }
249}
250
251/*
252 * start REPLY_TX command process
253 */
254int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
255{
256 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
257 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700258 struct iwl_station_priv *sta_priv = NULL;
Johannes Berga194e322010-08-27 08:53:46 -0700259 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700260 struct iwl_device_cmd *dev_cmd = NULL;
Emmanuel Grumbach47c1b492011-07-03 11:22:15 +0300261 struct iwl_tx_cmd *tx_cmd;
Emmanuel Grumbach47c1b492011-07-03 11:22:15 +0300262
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700263 __le16 fc;
264 u8 hdr_len;
Emmanuel Grumbach47c1b492011-07-03 11:22:15 +0300265 u16 len;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700266 u8 sta_id;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700267 unsigned long flags;
Johannes Berg2e340342010-11-16 11:51:38 -0800268 bool is_agg = false;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700269
Johannes Bergc6baf7f2011-07-23 10:24:47 -0700270 if (info->control.vif)
Johannes Berga194e322010-08-27 08:53:46 -0700271 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
272
Emmanuel Grumbach10b15e62011-08-25 23:10:43 -0700273 spin_lock_irqsave(&priv->shrd->lock, flags);
Emmanuel Grumbach845a9c02011-08-25 23:11:04 -0700274 if (iwl_is_rfkill(priv->shrd)) {
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700275 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
Johannes Berg2c46f722011-04-28 07:27:10 -0700276 goto drop_unlock_priv;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700277 }
278
279 fc = hdr->frame_control;
280
281#ifdef CONFIG_IWLWIFI_DEBUG
282 if (ieee80211_is_auth(fc))
283 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
284 else if (ieee80211_is_assoc_req(fc))
285 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
286 else if (ieee80211_is_reassoc_req(fc))
287 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
288#endif
289
Johannes Berg79d3eef2011-11-10 06:55:01 -0800290 if (unlikely(ieee80211_is_probe_resp(fc))) {
291 struct iwl_wipan_noa_data *noa_data =
292 rcu_dereference(priv->noa_data);
293
294 if (noa_data &&
295 pskb_expand_head(skb, 0, noa_data->length,
296 GFP_ATOMIC) == 0) {
297 memcpy(skb_put(skb, noa_data->length),
298 noa_data->data, noa_data->length);
299 hdr = (struct ieee80211_hdr *)skb->data;
300 }
301 }
302
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700303 hdr_len = ieee80211_hdrlen(fc);
304
Stanislaw Gruszkabfd36102011-04-29 17:51:06 +0200305 /* For management frames use broadcast id to do not break aggregation */
306 if (!ieee80211_is_data(fc))
307 sta_id = ctx->bcast_sta_id;
308 else {
309 /* Find index into station table for destination station */
310 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
311 if (sta_id == IWL_INVALID_STATION) {
312 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
313 hdr->addr1);
John W. Linvillee00cf3b2011-05-16 14:55:42 -0400314 goto drop_unlock_priv;
Stanislaw Gruszkabfd36102011-04-29 17:51:06 +0200315 }
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700316 }
317
318 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
319
Emmanuel Grumbach47c1b492011-07-03 11:22:15 +0300320 if (info->control.sta)
321 sta_priv = (void *)info->control.sta->drv_priv;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700322
Johannes Berg67158b62010-11-16 11:51:04 -0800323 if (sta_priv && sta_priv->asleep &&
Johannes Berg47086fc2011-09-29 16:04:33 +0200324 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700325 /*
326 * This sends an asynchronous command to the device,
327 * but we can rely on it being processed before the
328 * next frame is processed -- and the next frame to
329 * this station is the one that will consume this
330 * counter.
331 * For now set the counter to just 1 since we do not
332 * support uAPSD yet.
333 */
334 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
335 }
336
Emmanuel Grumbach08ecf102011-09-20 15:37:26 -0700337 if (info->flags & IEEE80211_TX_CTL_AMPDU)
338 is_agg = true;
339
Emmanuel Grumbach10b15e62011-08-25 23:10:43 -0700340 /* irqs already disabled/saved above when locking priv->shrd->lock */
Emmanuel Grumbachf39c95e2011-08-25 23:10:47 -0700341 spin_lock(&priv->shrd->sta_lock);
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700342
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700343 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
344
345 if (unlikely(!dev_cmd))
Johannes Berg2c46f722011-04-28 07:27:10 -0700346 goto drop_unlock_sta;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700347
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700348 memset(dev_cmd, 0, sizeof(*dev_cmd));
Emmanuel Grumbach132f98c2011-09-20 15:37:24 -0700349 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700350
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700351 /* Total # bytes to be transmitted */
352 len = (u16)skb->len;
353 tx_cmd->len = cpu_to_le16(len);
354
355 if (info->control.hw_key)
356 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
357
358 /* TODO need this for burst mode later on */
Johannes Bergd44ae692010-08-23 07:56:56 -0700359 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700360 iwl_dbg_log_tx_data_frame(priv, len, hdr);
361
362 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
363
364 iwl_update_stats(priv, true, fc, len);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700365
Emmanuel Grumbach1a849612011-09-22 15:14:52 -0700366 memset(&info->status, 0, sizeof(info->status));
367
Emmanuel Grumbach2c452292011-08-25 23:11:21 -0700368 info->driver_data[0] = ctx;
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700369 info->driver_data[1] = dev_cmd;
Emmanuel Grumbach2c452292011-08-25 23:11:21 -0700370
Emmanuel Grumbache13c0c52011-08-25 23:11:24 -0700371 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id))
Johannes Berg2c46f722011-04-28 07:27:10 -0700372 goto drop_unlock_sta;
Johannes Berg2c46f722011-04-28 07:27:10 -0700373
Emmanuel Grumbachf39c95e2011-08-25 23:10:47 -0700374 spin_unlock(&priv->shrd->sta_lock);
Emmanuel Grumbach10b15e62011-08-25 23:10:43 -0700375 spin_unlock_irqrestore(&priv->shrd->lock, flags);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700376
377 /*
Johannes Berg2e340342010-11-16 11:51:38 -0800378 * Avoid atomic ops if it isn't an associated client.
379 * Also, if this is a packet for aggregation, don't
380 * increase the counter because the ucode will stop
381 * aggregation queues when their respective station
382 * goes to sleep.
383 */
384 if (sta_priv && sta_priv->client && !is_agg)
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700385 atomic_inc(&sta_priv->pending_frames);
386
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700387 return 0;
388
Johannes Berg2c46f722011-04-28 07:27:10 -0700389drop_unlock_sta:
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700390 if (dev_cmd)
391 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
Emmanuel Grumbachf39c95e2011-08-25 23:10:47 -0700392 spin_unlock(&priv->shrd->sta_lock);
Johannes Berg2c46f722011-04-28 07:27:10 -0700393drop_unlock_priv:
Emmanuel Grumbach10b15e62011-08-25 23:10:43 -0700394 spin_unlock_irqrestore(&priv->shrd->lock, flags);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700395 return -1;
396}
397
Emmanuel Grumbachbc237732011-11-21 13:25:31 +0200398int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
399 struct ieee80211_sta *sta, u16 tid)
400{
401 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
402 struct iwl_tid_data *tid_data;
403 unsigned long flags;
404 int sta_id;
405
406 sta_id = iwl_sta_id(sta);
407
408 if (sta_id == IWL_INVALID_STATION) {
409 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
410 return -ENXIO;
411 }
412
413 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
414
415 tid_data = &priv->shrd->tid_data[sta_id][tid];
416
417 switch (priv->shrd->tid_data[sta_id][tid].agg.state) {
418 case IWL_EMPTYING_HW_QUEUE_ADDBA:
419 /*
420 * This can happen if the peer stops aggregation
421 * again before we've had a chance to drain the
422 * queue we selected previously, i.e. before the
423 * session was really started completely.
424 */
425 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
426 goto turn_off;
427 case IWL_AGG_ON:
428 break;
429 default:
430 IWL_WARN(priv, "Stopping AGG while state not ON "
431 "or starting for %d on %d (%d)\n", sta_id, tid,
432 priv->shrd->tid_data[sta_id][tid].agg.state);
433 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
434 return 0;
435 }
436
437 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
438
439 /* There are still packets for this RA / TID in the HW */
440 if (tid_data->agg.ssn != tid_data->next_reclaimed) {
441 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
442 "next_recl = %d",
443 tid_data->agg.ssn,
444 tid_data->next_reclaimed);
445 priv->shrd->tid_data[sta_id][tid].agg.state =
446 IWL_EMPTYING_HW_QUEUE_DELBA;
447 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
448 return 0;
449 }
450
451 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
452 tid_data->agg.ssn);
453turn_off:
454 priv->shrd->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
455
456 /* do not restore/save irqs */
457 spin_unlock(&priv->shrd->sta_lock);
458 spin_lock(&priv->shrd->lock);
459
460 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
461
462 spin_unlock_irqrestore(&priv->shrd->lock, flags);
463
464 iwl_stop_tx_ba_trans_ready(priv, vif_priv->ctx->ctxid, sta_id, tid);
465
466 return 0;
467}
468
Johannes Berg832f47e2010-04-29 04:43:07 -0700469int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
Johannes Berg619753f2010-04-30 11:30:46 -0700470 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700471{
Emmanuel Grumbach288712a2011-08-25 23:11:25 -0700472 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
Emmanuel Grumbach3c69b592011-11-21 13:25:31 +0200473 struct iwl_tid_data *tid_data;
474 unsigned long flags;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700475 int sta_id;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700476 int ret;
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700477
Wey-Yi Guy5bc98902011-05-27 08:40:32 -0700478 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
479 sta->addr, tid);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700480
Johannes Berg619753f2010-04-30 11:30:46 -0700481 sta_id = iwl_sta_id(sta);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700482 if (sta_id == IWL_INVALID_STATION) {
483 IWL_ERR(priv, "Start AGG on invalid station\n");
484 return -ENXIO;
485 }
Emmanuel Grumbach5f85a782011-08-25 23:11:18 -0700486 if (unlikely(tid >= IWL_MAX_TID_COUNT))
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700487 return -EINVAL;
488
Emmanuel Grumbach5f85a782011-08-25 23:11:18 -0700489 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700490 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
491 return -ENXIO;
492 }
493
Emmanuel Grumbach288712a2011-08-25 23:11:25 -0700494 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700495 if (ret)
496 return ret;
497
Emmanuel Grumbach3c69b592011-11-21 13:25:31 +0200498 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
499
500 tid_data = &priv->shrd->tid_data[sta_id][tid];
501 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
502
503 *ssn = tid_data->agg.ssn;
504
505 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
506 if (ret) {
507 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
508 return ret;
509 }
510
511 if (*ssn == tid_data->next_reclaimed) {
512 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
513 tid_data->agg.ssn);
514 tid_data->agg.state = IWL_AGG_ON;
515 iwl_start_tx_ba_trans_ready(priv, vif_priv->ctx->ctxid, sta_id,
516 tid);
517 } else {
518 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
519 "next_reclaimed = %d",
520 tid_data->agg.ssn,
521 tid_data->next_reclaimed);
522 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
523 }
524
525 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
Emmanuel Grumbach288712a2011-08-25 23:11:25 -0700526
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700527 return ret;
528}
529
Emmanuel Grumbach822e8b22011-11-21 13:25:31 +0200530int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
531 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
532{
533 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
534 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
535 unsigned long flags;
536 u16 ssn;
537
538 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
539
540 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
541 ssn = priv->shrd->tid_data[sta_priv->sta_id][tid].agg.ssn;
542 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
543
544 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
545 buf_size, ssn);
546
547 /*
548 * If the limit is 0, then it wasn't initialised yet,
549 * use the default. We can do that since we take the
550 * minimum below, and we don't want to go above our
551 * default due to hardware restrictions.
552 */
553 if (sta_priv->max_agg_bufsize == 0)
554 sta_priv->max_agg_bufsize =
555 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
556
557 /*
558 * Even though in theory the peer could have different
559 * aggregation reorder buffer sizes for different sessions,
560 * our ucode doesn't allow for that and has a global limit
561 * for each station. Therefore, use the minimum of all the
562 * aggregation sessions and our default value.
563 */
564 sta_priv->max_agg_bufsize =
565 min(sta_priv->max_agg_bufsize, buf_size);
566
567 if (cfg(priv)->ht_params &&
568 cfg(priv)->ht_params->use_rts_for_aggregation) {
569 /*
570 * switch to RTS/CTS if it is the prefer protection
571 * method for HT traffic
572 */
573
574 sta_priv->lq_sta.lq.general_params.flags |=
575 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
576 }
577 priv->agg_tids_count++;
578 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
579 priv->agg_tids_count);
580
581 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
582 sta_priv->max_agg_bufsize;
583
584 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
585 sta->addr, tid);
586
587 return iwl_send_lq_cmd(priv, ctx,
588 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
589}
590
Johannes Berg2e340342010-11-16 11:51:38 -0800591static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
592 struct iwl_rxon_context *ctx,
593 const u8 *addr1)
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700594{
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700595 struct ieee80211_sta *sta;
596 struct iwl_station_priv *sta_priv;
597
Johannes Berg6db63402010-06-07 21:20:38 +0200598 rcu_read_lock();
Johannes Berg2e340342010-11-16 11:51:38 -0800599 sta = ieee80211_find_sta(ctx->vif, addr1);
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700600 if (sta) {
601 sta_priv = (void *)sta->drv_priv;
602 /* avoid atomic ops if this isn't a client */
603 if (sta_priv->client &&
604 atomic_dec_return(&sta_priv->pending_frames) == 0)
605 ieee80211_sta_block_awake(priv->hw, sta, false);
606 }
Johannes Berg6db63402010-06-07 21:20:38 +0200607 rcu_read_unlock();
Johannes Berg2e340342010-11-16 11:51:38 -0800608}
609
Wey-Yi Guy74bcdb32010-03-17 13:34:34 -0700610/**
Wey-Yi Guy8d801082010-03-17 13:34:36 -0700611 * translate ucode response to mac80211 tx status control values
612 */
Emmanuel Grumbach04e1cab2011-08-25 23:11:01 -0700613static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
Wey-Yi Guy8d801082010-03-17 13:34:36 -0700614 struct ieee80211_tx_info *info)
615{
616 struct ieee80211_tx_rate *r = &info->control.rates[0];
617
618 info->antenna_sel_tx =
619 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
620 if (rate_n_flags & RATE_MCS_HT_MSK)
621 r->flags |= IEEE80211_TX_RC_MCS;
622 if (rate_n_flags & RATE_MCS_GF_MSK)
623 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
624 if (rate_n_flags & RATE_MCS_HT40_MSK)
625 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
626 if (rate_n_flags & RATE_MCS_DUP_MSK)
627 r->flags |= IEEE80211_TX_RC_DUP_DATA;
628 if (rate_n_flags & RATE_MCS_SGI_MSK)
629 r->flags |= IEEE80211_TX_RC_SHORT_GI;
630 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
631}
632
Johannes Berg69fdb712010-09-22 18:02:02 +0200633#ifdef CONFIG_IWLWIFI_DEBUG
634const char *iwl_get_tx_fail_reason(u32 status)
635{
636#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
637#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
638
639 switch (status & TX_STATUS_MSK) {
640 case TX_STATUS_SUCCESS:
641 return "SUCCESS";
642 TX_STATUS_POSTPONE(DELAY);
643 TX_STATUS_POSTPONE(FEW_BYTES);
644 TX_STATUS_POSTPONE(BT_PRIO);
645 TX_STATUS_POSTPONE(QUIET_PERIOD);
646 TX_STATUS_POSTPONE(CALC_TTAK);
647 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
648 TX_STATUS_FAIL(SHORT_LIMIT);
649 TX_STATUS_FAIL(LONG_LIMIT);
650 TX_STATUS_FAIL(FIFO_UNDERRUN);
651 TX_STATUS_FAIL(DRAIN_FLOW);
652 TX_STATUS_FAIL(RFKILL_FLUSH);
653 TX_STATUS_FAIL(LIFE_EXPIRE);
654 TX_STATUS_FAIL(DEST_PS);
655 TX_STATUS_FAIL(HOST_ABORTED);
656 TX_STATUS_FAIL(BT_RETRY);
657 TX_STATUS_FAIL(STA_INVALID);
658 TX_STATUS_FAIL(FRAG_DROPPED);
659 TX_STATUS_FAIL(TID_DISABLE);
660 TX_STATUS_FAIL(FIFO_FLUSHED);
661 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
662 TX_STATUS_FAIL(PASSIVE_NO_RX);
663 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
664 }
665
666 return "UNKNOWN";
667
668#undef TX_STATUS_FAIL
669#undef TX_STATUS_POSTPONE
670}
671#endif /* CONFIG_IWLWIFI_DEBUG */
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700672
Emmanuel Grumbach04e1cab2011-08-25 23:11:01 -0700673static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
674{
675 status &= AGG_TX_STATUS_MSK;
676
677 switch (status) {
678 case AGG_TX_STATE_UNDERRUN_MSK:
679 priv->reply_agg_tx_stats.underrun++;
680 break;
681 case AGG_TX_STATE_BT_PRIO_MSK:
682 priv->reply_agg_tx_stats.bt_prio++;
683 break;
684 case AGG_TX_STATE_FEW_BYTES_MSK:
685 priv->reply_agg_tx_stats.few_bytes++;
686 break;
687 case AGG_TX_STATE_ABORT_MSK:
688 priv->reply_agg_tx_stats.abort++;
689 break;
690 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
691 priv->reply_agg_tx_stats.last_sent_ttl++;
692 break;
693 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
694 priv->reply_agg_tx_stats.last_sent_try++;
695 break;
696 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
697 priv->reply_agg_tx_stats.last_sent_bt_kill++;
698 break;
699 case AGG_TX_STATE_SCD_QUERY_MSK:
700 priv->reply_agg_tx_stats.scd_query++;
701 break;
702 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
703 priv->reply_agg_tx_stats.bad_crc32++;
704 break;
705 case AGG_TX_STATE_RESPONSE_MSK:
706 priv->reply_agg_tx_stats.response++;
707 break;
708 case AGG_TX_STATE_DUMP_TX_MSK:
709 priv->reply_agg_tx_stats.dump_tx++;
710 break;
711 case AGG_TX_STATE_DELAY_TX_MSK:
712 priv->reply_agg_tx_stats.delay_tx++;
713 break;
714 default:
715 priv->reply_agg_tx_stats.unknown++;
716 break;
717 }
718}
719
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700720static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
721 struct iwlagn_tx_resp *tx_resp)
722{
723 struct agg_tx_status *frame_status = &tx_resp->status;
724 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
725 IWLAGN_TX_RES_TID_POS;
726 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
727 IWLAGN_TX_RES_RA_POS;
Emmanuel Grumbach5f85a782011-08-25 23:11:18 -0700728 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700729 u32 status = le16_to_cpu(tx_resp->status.status);
730 int i;
731
732 if (agg->wait_for_ba)
733 IWL_DEBUG_TX_REPLY(priv,
734 "got tx response w/o block-ack\n");
735
736 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
737 agg->wait_for_ba = (tx_resp->frame_count > 1);
738
739 /*
740 * If the BT kill count is non-zero, we'll get this
741 * notification again.
742 */
743 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
Don Fry38622412011-12-16 07:07:36 -0800744 cfg(priv)->bt_params &&
745 cfg(priv)->bt_params->advanced_bt_coexist) {
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700746 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
747 }
748
Emmanuel Grumbach1a849612011-09-22 15:14:52 -0700749 if (tx_resp->frame_count == 1)
750 return;
751
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700752 /* Construct bit-map of pending frames within Tx window */
753 for (i = 0; i < tx_resp->frame_count; i++) {
754 u16 fstatus = le16_to_cpu(frame_status[i].status);
755
756 if (status & AGG_TX_STATUS_MSK)
757 iwlagn_count_agg_tx_err_status(priv, fstatus);
758
759 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
760 AGG_TX_STATE_ABORT_MSK))
761 continue;
762
763 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
764 "try-count (0x%08x)\n",
765 iwl_get_agg_tx_fail_reason(fstatus),
766 fstatus & AGG_TX_STATUS_MSK,
767 fstatus & AGG_TX_TRY_MSK);
768 }
769}
770
Emmanuel Grumbach04e1cab2011-08-25 23:11:01 -0700771#ifdef CONFIG_IWLWIFI_DEBUG
772#define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
773
774const char *iwl_get_agg_tx_fail_reason(u16 status)
775{
776 status &= AGG_TX_STATUS_MSK;
777 switch (status) {
778 case AGG_TX_STATE_TRANSMITTED:
779 return "SUCCESS";
780 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
781 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
782 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
783 AGG_TX_STATE_FAIL(ABORT_MSK);
784 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
785 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
786 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
787 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
788 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
789 AGG_TX_STATE_FAIL(RESPONSE_MSK);
790 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
791 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
792 }
793
794 return "UNKNOWN";
795}
796#endif /* CONFIG_IWLWIFI_DEBUG */
797
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700798static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
799{
800 return le32_to_cpup((__le32 *)&tx_resp->status +
801 tx_resp->frame_count) & MAX_SN;
802}
803
Emmanuel Grumbach04e1cab2011-08-25 23:11:01 -0700804static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
805{
806 status &= TX_STATUS_MSK;
807
808 switch (status) {
809 case TX_STATUS_POSTPONE_DELAY:
810 priv->reply_tx_stats.pp_delay++;
811 break;
812 case TX_STATUS_POSTPONE_FEW_BYTES:
813 priv->reply_tx_stats.pp_few_bytes++;
814 break;
815 case TX_STATUS_POSTPONE_BT_PRIO:
816 priv->reply_tx_stats.pp_bt_prio++;
817 break;
818 case TX_STATUS_POSTPONE_QUIET_PERIOD:
819 priv->reply_tx_stats.pp_quiet_period++;
820 break;
821 case TX_STATUS_POSTPONE_CALC_TTAK:
822 priv->reply_tx_stats.pp_calc_ttak++;
823 break;
824 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
825 priv->reply_tx_stats.int_crossed_retry++;
826 break;
827 case TX_STATUS_FAIL_SHORT_LIMIT:
828 priv->reply_tx_stats.short_limit++;
829 break;
830 case TX_STATUS_FAIL_LONG_LIMIT:
831 priv->reply_tx_stats.long_limit++;
832 break;
833 case TX_STATUS_FAIL_FIFO_UNDERRUN:
834 priv->reply_tx_stats.fifo_underrun++;
835 break;
836 case TX_STATUS_FAIL_DRAIN_FLOW:
837 priv->reply_tx_stats.drain_flow++;
838 break;
839 case TX_STATUS_FAIL_RFKILL_FLUSH:
840 priv->reply_tx_stats.rfkill_flush++;
841 break;
842 case TX_STATUS_FAIL_LIFE_EXPIRE:
843 priv->reply_tx_stats.life_expire++;
844 break;
845 case TX_STATUS_FAIL_DEST_PS:
846 priv->reply_tx_stats.dest_ps++;
847 break;
848 case TX_STATUS_FAIL_HOST_ABORTED:
849 priv->reply_tx_stats.host_abort++;
850 break;
851 case TX_STATUS_FAIL_BT_RETRY:
852 priv->reply_tx_stats.bt_retry++;
853 break;
854 case TX_STATUS_FAIL_STA_INVALID:
855 priv->reply_tx_stats.sta_invalid++;
856 break;
857 case TX_STATUS_FAIL_FRAG_DROPPED:
858 priv->reply_tx_stats.frag_drop++;
859 break;
860 case TX_STATUS_FAIL_TID_DISABLE:
861 priv->reply_tx_stats.tid_disable++;
862 break;
863 case TX_STATUS_FAIL_FIFO_FLUSHED:
864 priv->reply_tx_stats.fifo_flush++;
865 break;
866 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
867 priv->reply_tx_stats.insuff_cf_poll++;
868 break;
869 case TX_STATUS_FAIL_PASSIVE_NO_RX:
870 priv->reply_tx_stats.fail_hw_drop++;
871 break;
872 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
873 priv->reply_tx_stats.sta_color_mismatch++;
874 break;
875 default:
876 priv->reply_tx_stats.unknown++;
877 break;
878 }
879}
880
881static void iwlagn_set_tx_status(struct iwl_priv *priv,
882 struct ieee80211_tx_info *info,
883 struct iwlagn_tx_resp *tx_resp,
884 bool is_agg)
885{
886 u16 status = le16_to_cpu(tx_resp->status.status);
887
888 info->status.rates[0].count = tx_resp->failure_frame + 1;
889 if (is_agg)
890 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
891 info->flags |= iwl_tx_status_to_mac80211(status);
892 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
893 info);
894 if (!iwl_is_tx_success(status))
895 iwlagn_count_tx_err_status(priv, status);
896}
897
898static void iwl_check_abort_status(struct iwl_priv *priv,
899 u8 frame_count, u32 status)
900{
901 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
902 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
903 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
904 queue_work(priv->shrd->workqueue, &priv->tx_flush);
905 }
906}
907
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -0700908int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
909 struct iwl_device_cmd *cmd)
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700910{
911 struct iwl_rx_packet *pkt = rxb_addr(rxb);
912 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
913 int txq_id = SEQ_TO_QUEUE(sequence);
Emmanuel Grumbachff620842011-09-06 09:31:25 -0700914 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700915 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
916 struct ieee80211_hdr *hdr;
917 u32 status = le16_to_cpu(tx_resp->status.status);
Emmanuel Grumbacheb9a3722011-11-21 11:07:18 +0200918 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700919 int tid;
920 int sta_id;
921 int freed;
922 struct ieee80211_tx_info *info;
923 unsigned long flags;
924 struct sk_buff_head skbs;
925 struct sk_buff *skb;
926 struct iwl_rxon_context *ctx;
Emmanuel Grumbach8ad71be2011-08-25 23:11:32 -0700927 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700928
929 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
930 IWLAGN_TX_RES_TID_POS;
931 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
932 IWLAGN_TX_RES_RA_POS;
933
934 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
935
Emmanuel Grumbach8ad71be2011-08-25 23:11:32 -0700936 if (is_agg)
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700937 iwl_rx_reply_tx_agg(priv, tx_resp);
938
939 if (tx_resp->frame_count == 1) {
Emmanuel Grumbacheb9a3722011-11-21 11:07:18 +0200940 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
941 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
942
943 if (is_agg) {
944 /* If this is an aggregation queue, we can rely on the
945 * ssn since the wifi sequence number corresponds to
946 * the index in the TFD ring (%256).
947 * The seq_ctl is the sequence control of the packet
948 * to which this Tx response relates. But if there is a
949 * hole in the bitmap of the BA we received, this Tx
950 * response may allow to reclaim the hole and all the
951 * subsequent packets that were already acked.
952 * In that case, seq_ctl != ssn, and the next packet
953 * to be reclaimed will be ssn and not seq_ctl.
954 */
955 next_reclaimed = ssn;
956 }
957
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700958 __skb_queue_head_init(&skbs);
Emmanuel Grumbacheb9a3722011-11-21 11:07:18 +0200959 priv->shrd->tid_data[sta_id][tid].next_reclaimed =
960 next_reclaimed;
961
962 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d",
963 next_reclaimed);
964
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700965 /*we can free until ssn % q.n_bd not inclusive */
Emmanuel Grumbach464021f2011-08-25 23:11:26 -0700966 iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
967 ssn, status, &skbs);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700968 freed = 0;
969 while (!skb_queue_empty(&skbs)) {
970 skb = __skb_dequeue(&skbs);
971 hdr = (struct ieee80211_hdr *)skb->data;
972
973 if (!ieee80211_is_data_qos(hdr->frame_control))
974 priv->last_seq_ctl = tx_resp->seq_ctl;
975
976 info = IEEE80211_SKB_CB(skb);
977 ctx = info->driver_data[0];
Emmanuel Grumbachdfa2bdb2011-08-25 23:11:23 -0700978 kmem_cache_free(priv->tx_cmd_pool,
979 (info->driver_data[1]));
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700980
981 memset(&info->status, 0, sizeof(info->status));
982
983 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
984 iwl_is_associated_ctx(ctx) && ctx->vif &&
985 ctx->vif->type == NL80211_IFTYPE_STATION) {
986 ctx->last_tx_rejected = true;
Emmanuel Grumbach81a3de12011-11-10 06:55:24 -0800987 iwl_trans_stop_queue(trans(priv), txq_id,
988 "Tx on passive channel");
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -0700989
990 IWL_DEBUG_TX_REPLY(priv,
991 "TXQ %d status %s (0x%08x) "
992 "rate_n_flags 0x%x retries %d\n",
993 txq_id,
994 iwl_get_tx_fail_reason(status),
995 status,
996 le32_to_cpu(tx_resp->rate_n_flags),
997 tx_resp->failure_frame);
998
999 IWL_DEBUG_TX_REPLY(priv,
1000 "FrameCnt = %d, idx=%d\n",
1001 tx_resp->frame_count, cmd_index);
1002 }
1003
1004 /* check if BAR is needed */
1005 if (is_agg && !iwl_is_tx_success(status))
1006 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1007 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1008 tx_resp, is_agg);
1009 if (!is_agg)
1010 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1011
1012 ieee80211_tx_status_irqsafe(priv->hw, skb);
1013
1014 freed++;
1015 }
1016
1017 WARN_ON(!is_agg && freed != 1);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001018 }
1019
1020 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1021 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -07001022 return 0;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001023}
1024
1025/**
1026 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1027 *
1028 * Handles block-acknowledge notification from device, which reports success
1029 * of frames sent via aggregation.
1030 */
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -07001031int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1032 struct iwl_rx_mem_buffer *rxb,
1033 struct iwl_device_cmd *cmd)
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001034{
1035 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1036 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001037 struct iwl_ht_agg *agg;
1038 struct sk_buff_head reclaimed_skbs;
1039 struct ieee80211_tx_info *info;
1040 struct ieee80211_hdr *hdr;
1041 struct sk_buff *skb;
1042 unsigned long flags;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001043 int sta_id;
1044 int tid;
1045 int freed;
1046
1047 /* "flow" corresponds to Tx queue */
1048 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1049
1050 /* "ssn" is start of block-ack Tx window, corresponds to index
1051 * (in Tx queue's circular buffer) of first TFD/frame in window */
1052 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1053
1054 if (scd_flow >= hw_params(priv).max_txq_num) {
1055 IWL_ERR(priv,
1056 "BUG_ON scd_flow is bigger than number of queues\n");
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -07001057 return 0;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001058 }
1059
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001060 sta_id = ba_resp->sta_id;
1061 tid = ba_resp->tid;
Emmanuel Grumbach5f85a782011-08-25 23:11:18 -07001062 agg = &priv->shrd->tid_data[sta_id][tid].agg;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001063
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001064 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1065
1066 if (unlikely(agg->txq_id != scd_flow)) {
1067 /*
1068 * FIXME: this is a uCode bug which need to be addressed,
1069 * log the information and return for now!
1070 * since it is possible happen very often and in order
1071 * not to fill the syslog, don't enable the logging by default
1072 */
1073 IWL_DEBUG_TX_REPLY(priv,
1074 "BA scd_flow %d does not match txq_id %d\n",
1075 scd_flow, agg->txq_id);
1076 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -07001077 return 0;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001078 }
1079
1080 if (unlikely(!agg->wait_for_ba)) {
1081 if (unlikely(ba_resp->bitmap))
1082 IWL_ERR(priv, "Received BA when not expected\n");
1083 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -07001084 return 0;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001085 }
1086
1087 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1088 "sta_id = %d\n",
1089 agg->wait_for_ba,
1090 (u8 *) &ba_resp->sta_addr_lo32,
1091 ba_resp->sta_id);
1092 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1093 "scd_flow = %d, scd_ssn = %d\n",
Emmanuel Grumbachaca15f82011-11-21 11:15:34 +02001094 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001095 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
Emmanuel Grumbachb88f5be2011-11-08 01:57:39 -08001096 scd_flow, ba_resp_scd_ssn);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001097
1098 /* Mark that the expected block-ack response arrived */
Emmanuel Grumbach21023e22011-09-15 11:46:34 -07001099 agg->wait_for_ba = false;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001100
1101 /* Sanity check values reported by uCode */
1102 if (ba_resp->txed_2_done > ba_resp->txed) {
1103 IWL_DEBUG_TX_REPLY(priv,
1104 "bogus sent(%d) and ack(%d) count\n",
1105 ba_resp->txed, ba_resp->txed_2_done);
1106 /*
1107 * set txed_2_done = txed,
1108 * so it won't impact rate scale
1109 */
1110 ba_resp->txed = ba_resp->txed_2_done;
1111 }
1112 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1113 ba_resp->txed, ba_resp->txed_2_done);
1114
1115 __skb_queue_head_init(&reclaimed_skbs);
1116
1117 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1118 * block-ack window (we assume that they've been successfully
1119 * transmitted ... if not, it's too late anyway). */
Emmanuel Grumbacheb9a3722011-11-21 11:07:18 +02001120 priv->shrd->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
Emmanuel Grumbach464021f2011-08-25 23:11:26 -07001121 iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn,
1122 0, &reclaimed_skbs);
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001123 freed = 0;
1124 while (!skb_queue_empty(&reclaimed_skbs)) {
1125
1126 skb = __skb_dequeue(&reclaimed_skbs);
1127 hdr = (struct ieee80211_hdr *)skb->data;
1128
1129 if (ieee80211_is_data_qos(hdr->frame_control))
1130 freed++;
1131 else
1132 WARN_ON_ONCE(1);
1133
Emmanuel Grumbach1a849612011-09-22 15:14:52 -07001134 info = IEEE80211_SKB_CB(skb);
1135 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1136
1137 if (freed == 1) {
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001138 /* this is the first skb we deliver in this batch */
1139 /* put the rate scaling data there */
1140 info = IEEE80211_SKB_CB(skb);
1141 memset(&info->status, 0, sizeof(info->status));
1142 info->flags |= IEEE80211_TX_STAT_ACK;
1143 info->flags |= IEEE80211_TX_STAT_AMPDU;
1144 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1145 info->status.ampdu_len = ba_resp->txed;
1146 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1147 info);
1148 }
1149
1150 ieee80211_tx_status_irqsafe(priv->hw, skb);
1151 }
1152
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001153 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
Emmanuel Grumbach247c61d2011-09-20 15:37:23 -07001154 return 0;
Emmanuel Grumbacha0eaad72011-08-25 23:11:00 -07001155}