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b305a080 WYG |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
901069c7 | 5 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
b305a080 WYG |
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> | |
34 | ||
35 | #include "iwl-dev.h" | |
36 | #include "iwl-core.h" | |
37 | #include "iwl-sta.h" | |
38 | #include "iwl-io.h" | |
74bcdb33 | 39 | #include "iwl-helpers.h" |
19e6cda0 | 40 | #include "iwl-agn-hw.h" |
8d801080 | 41 | #include "iwl-agn.h" |
47c1b496 | 42 | #include "iwl-trans.h" |
b305a080 | 43 | |
74bcdb33 WYG |
44 | /* |
45 | * mac80211 queues, ACs, hardware queues, FIFOs. | |
46 | * | |
47 | * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues | |
48 | * | |
49 | * Mac80211 uses the following numbers, which we get as from it | |
50 | * by way of skb_get_queue_mapping(skb): | |
51 | * | |
52 | * VO 0 | |
53 | * VI 1 | |
54 | * BE 2 | |
55 | * BK 3 | |
56 | * | |
57 | * | |
58 | * Regular (not A-MPDU) frames are put into hardware queues corresponding | |
59 | * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their | |
60 | * own queue per aggregation session (RA/TID combination), such queues are | |
61 | * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In | |
62 | * order to map frames to the right queue, we also need an AC->hw queue | |
63 | * mapping. This is implemented here. | |
64 | * | |
65 | * Due to the way hw queues are set up (by the hw specific modules like | |
66 | * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity | |
67 | * mapping. | |
68 | */ | |
69 | ||
70 | static const u8 tid_to_ac[] = { | |
0c4ac342 JB |
71 | IEEE80211_AC_BE, |
72 | IEEE80211_AC_BK, | |
73 | IEEE80211_AC_BK, | |
74 | IEEE80211_AC_BE, | |
75 | IEEE80211_AC_VI, | |
76 | IEEE80211_AC_VI, | |
77 | IEEE80211_AC_VO, | |
78 | IEEE80211_AC_VO | |
74bcdb33 WYG |
79 | }; |
80 | ||
c2845d01 SZ |
81 | static inline int get_ac_from_tid(u16 tid) |
82 | { | |
83 | if (likely(tid < ARRAY_SIZE(tid_to_ac))) | |
84 | return tid_to_ac[tid]; | |
85 | ||
86 | /* no support for TIDs 8-15 yet */ | |
87 | return -EINVAL; | |
88 | } | |
89 | ||
e72f368b | 90 | static inline int get_fifo_from_tid(struct iwl_rxon_context *ctx, u16 tid) |
74bcdb33 WYG |
91 | { |
92 | if (likely(tid < ARRAY_SIZE(tid_to_ac))) | |
e72f368b | 93 | return ctx->ac_to_fifo[tid_to_ac[tid]]; |
74bcdb33 WYG |
94 | |
95 | /* no support for TIDs 8-15 yet */ | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
b305a080 WYG |
99 | /** |
100 | * iwlagn_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array | |
101 | */ | |
47c1b496 | 102 | void iwlagn_txq_update_byte_cnt_tbl(struct iwl_priv *priv, |
94b00658 JB |
103 | struct iwl_tx_queue *txq, |
104 | u16 byte_cnt) | |
b305a080 | 105 | { |
19e6cda0 | 106 | struct iwlagn_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr; |
b305a080 WYG |
107 | int write_ptr = txq->q.write_ptr; |
108 | int txq_id = txq->q.id; | |
109 | u8 sec_ctl = 0; | |
110 | u8 sta_id = 0; | |
111 | u16 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE; | |
112 | __le16 bc_ent; | |
113 | ||
114 | WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX); | |
115 | ||
ccb6c1c0 JB |
116 | sta_id = txq->cmd[txq->q.write_ptr]->cmd.tx.sta_id; |
117 | sec_ctl = txq->cmd[txq->q.write_ptr]->cmd.tx.sec_ctl; | |
118 | ||
119 | switch (sec_ctl & TX_CMD_SEC_MSK) { | |
120 | case TX_CMD_SEC_CCM: | |
121 | len += CCMP_MIC_LEN; | |
122 | break; | |
123 | case TX_CMD_SEC_TKIP: | |
124 | len += TKIP_ICV_LEN; | |
125 | break; | |
126 | case TX_CMD_SEC_WEP: | |
127 | len += WEP_IV_LEN + WEP_ICV_LEN; | |
128 | break; | |
b305a080 WYG |
129 | } |
130 | ||
131 | bc_ent = cpu_to_le16((len & 0xFFF) | (sta_id << 12)); | |
132 | ||
133 | scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent; | |
134 | ||
135 | if (write_ptr < TFD_QUEUE_SIZE_BC_DUP) | |
136 | scd_bc_tbl[txq_id]. | |
137 | tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent; | |
138 | } | |
139 | ||
94b00658 JB |
140 | static void iwlagn_txq_inval_byte_cnt_tbl(struct iwl_priv *priv, |
141 | struct iwl_tx_queue *txq) | |
b305a080 | 142 | { |
19e6cda0 | 143 | struct iwlagn_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr; |
b305a080 WYG |
144 | int txq_id = txq->q.id; |
145 | int read_ptr = txq->q.read_ptr; | |
146 | u8 sta_id = 0; | |
147 | __le16 bc_ent; | |
148 | ||
149 | WARN_ON(read_ptr >= TFD_QUEUE_SIZE_MAX); | |
150 | ||
13bb9483 | 151 | if (txq_id != priv->cmd_queue) |
b305a080 WYG |
152 | sta_id = txq->cmd[read_ptr]->cmd.tx.sta_id; |
153 | ||
154 | bc_ent = cpu_to_le16(1 | (sta_id << 12)); | |
155 | scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent; | |
156 | ||
157 | if (read_ptr < TFD_QUEUE_SIZE_BC_DUP) | |
158 | scd_bc_tbl[txq_id]. | |
159 | tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] = bc_ent; | |
160 | } | |
161 | ||
162 | static int iwlagn_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid, | |
163 | u16 txq_id) | |
164 | { | |
165 | u32 tbl_dw_addr; | |
166 | u32 tbl_dw; | |
167 | u16 scd_q2ratid; | |
168 | ||
b3c2ce13 | 169 | scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK; |
b305a080 WYG |
170 | |
171 | tbl_dw_addr = priv->scd_base_addr + | |
b3c2ce13 | 172 | SCD_TRANS_TBL_OFFSET_QUEUE(txq_id); |
b305a080 WYG |
173 | |
174 | tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr); | |
175 | ||
176 | if (txq_id & 0x1) | |
177 | tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); | |
178 | else | |
179 | tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); | |
180 | ||
181 | iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | static void iwlagn_tx_queue_stop_scheduler(struct iwl_priv *priv, u16 txq_id) | |
187 | { | |
188 | /* Simply stop the queue, but don't change any configuration; | |
189 | * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ | |
190 | iwl_write_prph(priv, | |
b3c2ce13 EG |
191 | SCD_QUEUE_STATUS_BITS(txq_id), |
192 | (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)| | |
193 | (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); | |
b305a080 WYG |
194 | } |
195 | ||
196 | void iwlagn_set_wr_ptrs(struct iwl_priv *priv, | |
197 | int txq_id, u32 index) | |
198 | { | |
199 | iwl_write_direct32(priv, HBUS_TARG_WRPTR, | |
200 | (index & 0xff) | (txq_id << 8)); | |
b3c2ce13 | 201 | iwl_write_prph(priv, SCD_QUEUE_RDPTR(txq_id), index); |
b305a080 WYG |
202 | } |
203 | ||
204 | void iwlagn_tx_queue_set_status(struct iwl_priv *priv, | |
205 | struct iwl_tx_queue *txq, | |
206 | int tx_fifo_id, int scd_retry) | |
207 | { | |
208 | int txq_id = txq->q.id; | |
209 | int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0; | |
210 | ||
b3c2ce13 EG |
211 | iwl_write_prph(priv, SCD_QUEUE_STATUS_BITS(txq_id), |
212 | (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) | | |
213 | (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) | | |
214 | (1 << SCD_QUEUE_STTS_REG_POS_WSL) | | |
215 | SCD_QUEUE_STTS_REG_MSK); | |
b305a080 WYG |
216 | |
217 | txq->sched_retry = scd_retry; | |
218 | ||
219 | IWL_DEBUG_INFO(priv, "%s %s Queue %d on FIFO %d\n", | |
220 | active ? "Activate" : "Deactivate", | |
221 | scd_retry ? "BA" : "AC/CMD", txq_id, tx_fifo_id); | |
222 | } | |
223 | ||
c8823ec1 | 224 | static int iwlagn_txq_agg_enable(struct iwl_priv *priv, int txq_id, int sta_id, int tid) |
b305a080 | 225 | { |
19e6cda0 | 226 | if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) || |
7cb1b088 WYG |
227 | (IWLAGN_FIRST_AMPDU_QUEUE + |
228 | priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) { | |
b305a080 WYG |
229 | IWL_WARN(priv, |
230 | "queue number out of range: %d, must be %d to %d\n", | |
19e6cda0 WYG |
231 | txq_id, IWLAGN_FIRST_AMPDU_QUEUE, |
232 | IWLAGN_FIRST_AMPDU_QUEUE + | |
7cb1b088 | 233 | priv->cfg->base_params->num_of_ampdu_queues - 1); |
b305a080 WYG |
234 | return -EINVAL; |
235 | } | |
236 | ||
b305a080 | 237 | /* Modify device's station table to Tx this TID */ |
c8823ec1 JB |
238 | return iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); |
239 | } | |
240 | ||
241 | void iwlagn_txq_agg_queue_setup(struct iwl_priv *priv, | |
242 | struct ieee80211_sta *sta, | |
243 | int tid, int frame_limit) | |
244 | { | |
245 | int sta_id, tx_fifo, txq_id, ssn_idx; | |
246 | u16 ra_tid; | |
247 | unsigned long flags; | |
248 | struct iwl_tid_data *tid_data; | |
249 | ||
250 | sta_id = iwl_sta_id(sta); | |
251 | if (WARN_ON(sta_id == IWL_INVALID_STATION)) | |
252 | return; | |
253 | if (WARN_ON(tid >= MAX_TID_COUNT)) | |
254 | return; | |
255 | ||
256 | spin_lock_irqsave(&priv->sta_lock, flags); | |
257 | tid_data = &priv->stations[sta_id].tid[tid]; | |
258 | ssn_idx = SEQ_TO_SN(tid_data->seq_number); | |
259 | txq_id = tid_data->agg.txq_id; | |
260 | tx_fifo = tid_data->agg.tx_fifo; | |
261 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
262 | ||
263 | ra_tid = BUILD_RAxTID(sta_id, tid); | |
b305a080 WYG |
264 | |
265 | spin_lock_irqsave(&priv->lock, flags); | |
266 | ||
267 | /* Stop this Tx queue before configuring it */ | |
268 | iwlagn_tx_queue_stop_scheduler(priv, txq_id); | |
269 | ||
270 | /* Map receiver-address / traffic-ID to this queue */ | |
271 | iwlagn_tx_queue_set_q2ratid(priv, ra_tid, txq_id); | |
272 | ||
273 | /* Set this queue as a chain-building queue */ | |
b3c2ce13 | 274 | iwl_set_bits_prph(priv, SCD_QUEUECHAIN_SEL, (1<<txq_id)); |
b305a080 WYG |
275 | |
276 | /* enable aggregations for the queue */ | |
b3c2ce13 | 277 | iwl_set_bits_prph(priv, SCD_AGGR_SEL, (1<<txq_id)); |
b305a080 WYG |
278 | |
279 | /* Place first TFD at index corresponding to start sequence number. | |
280 | * Assumes that ssn_idx is valid (!= 0xFFF) */ | |
281 | priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); | |
282 | priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); | |
283 | iwlagn_set_wr_ptrs(priv, txq_id, ssn_idx); | |
284 | ||
285 | /* Set up Tx window size and frame limit for this queue */ | |
286 | iwl_write_targ_mem(priv, priv->scd_base_addr + | |
b3c2ce13 | 287 | SCD_CONTEXT_QUEUE_OFFSET(txq_id) + |
b305a080 | 288 | sizeof(u32), |
c8823ec1 | 289 | ((frame_limit << |
b3c2ce13 EG |
290 | SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) & |
291 | SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) | | |
c8823ec1 | 292 | ((frame_limit << |
b3c2ce13 EG |
293 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & |
294 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK)); | |
b305a080 | 295 | |
b3c2ce13 | 296 | iwl_set_bits_prph(priv, SCD_INTERRUPT_MASK, (1 << txq_id)); |
b305a080 WYG |
297 | |
298 | /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ | |
299 | iwlagn_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1); | |
300 | ||
301 | spin_unlock_irqrestore(&priv->lock, flags); | |
b305a080 WYG |
302 | } |
303 | ||
7ffef13d JB |
304 | static int iwlagn_txq_agg_disable(struct iwl_priv *priv, u16 txq_id, |
305 | u16 ssn_idx, u8 tx_fifo) | |
b305a080 | 306 | { |
19e6cda0 | 307 | if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) || |
7cb1b088 WYG |
308 | (IWLAGN_FIRST_AMPDU_QUEUE + |
309 | priv->cfg->base_params->num_of_ampdu_queues <= txq_id)) { | |
b305a080 WYG |
310 | IWL_ERR(priv, |
311 | "queue number out of range: %d, must be %d to %d\n", | |
19e6cda0 WYG |
312 | txq_id, IWLAGN_FIRST_AMPDU_QUEUE, |
313 | IWLAGN_FIRST_AMPDU_QUEUE + | |
7cb1b088 | 314 | priv->cfg->base_params->num_of_ampdu_queues - 1); |
b305a080 WYG |
315 | return -EINVAL; |
316 | } | |
317 | ||
318 | iwlagn_tx_queue_stop_scheduler(priv, txq_id); | |
319 | ||
b3c2ce13 | 320 | iwl_clear_bits_prph(priv, SCD_AGGR_SEL, (1 << txq_id)); |
b305a080 WYG |
321 | |
322 | priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); | |
323 | priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); | |
324 | /* supposes that ssn_idx is valid (!= 0xFFF) */ | |
325 | iwlagn_set_wr_ptrs(priv, txq_id, ssn_idx); | |
326 | ||
b3c2ce13 | 327 | iwl_clear_bits_prph(priv, SCD_INTERRUPT_MASK, (1 << txq_id)); |
b305a080 WYG |
328 | iwl_txq_ctx_deactivate(priv, txq_id); |
329 | iwlagn_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
5c3d29fc DF |
334 | static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, |
335 | struct ieee80211_tx_info *info, | |
336 | __le16 fc, __le32 *tx_flags) | |
337 | { | |
338 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || | |
339 | info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || | |
340 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
341 | *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; | |
342 | } | |
343 | ||
74bcdb33 WYG |
344 | /* |
345 | * handle build REPLY_TX command notification. | |
346 | */ | |
347 | static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, | |
d44ae69e JB |
348 | struct sk_buff *skb, |
349 | struct iwl_tx_cmd *tx_cmd, | |
350 | struct ieee80211_tx_info *info, | |
351 | struct ieee80211_hdr *hdr, | |
352 | u8 std_id) | |
74bcdb33 WYG |
353 | { |
354 | __le16 fc = hdr->frame_control; | |
355 | __le32 tx_flags = tx_cmd->tx_flags; | |
356 | ||
357 | tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
2c2def10 JB |
358 | |
359 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
74bcdb33 | 360 | tx_flags |= TX_CMD_FLG_ACK_MSK; |
2c2def10 JB |
361 | else |
362 | tx_flags &= ~TX_CMD_FLG_ACK_MSK; | |
74bcdb33 | 363 | |
2c2def10 JB |
364 | if (ieee80211_is_probe_resp(fc)) |
365 | tx_flags |= TX_CMD_FLG_TSF_MSK; | |
366 | else if (ieee80211_is_back_req(fc)) | |
74bcdb33 | 367 | tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; |
d44ae69e | 368 | else if (info->band == IEEE80211_BAND_2GHZ && |
7cb1b088 WYG |
369 | priv->cfg->bt_params && |
370 | priv->cfg->bt_params->advanced_bt_coexist && | |
d44ae69e JB |
371 | (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || |
372 | ieee80211_is_reassoc_req(fc) || | |
373 | skb->protocol == cpu_to_be16(ETH_P_PAE))) | |
374 | tx_flags |= TX_CMD_FLG_IGNORE_BT; | |
74bcdb33 WYG |
375 | |
376 | ||
377 | tx_cmd->sta_id = std_id; | |
378 | if (ieee80211_has_morefrags(fc)) | |
379 | tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; | |
380 | ||
381 | if (ieee80211_is_data_qos(fc)) { | |
382 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
383 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
384 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; | |
385 | } else { | |
386 | tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; | |
387 | } | |
388 | ||
5c3d29fc | 389 | iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); |
74bcdb33 WYG |
390 | |
391 | tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); | |
392 | if (ieee80211_is_mgmt(fc)) { | |
393 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
394 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); | |
395 | else | |
396 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); | |
397 | } else { | |
398 | tx_cmd->timeout.pm_frame_timeout = 0; | |
399 | } | |
400 | ||
401 | tx_cmd->driver_txop = 0; | |
402 | tx_cmd->tx_flags = tx_flags; | |
403 | tx_cmd->next_frame_len = 0; | |
404 | } | |
405 | ||
406 | #define RTS_DFAULT_RETRY_LIMIT 60 | |
407 | ||
408 | static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, | |
409 | struct iwl_tx_cmd *tx_cmd, | |
410 | struct ieee80211_tx_info *info, | |
411 | __le16 fc) | |
412 | { | |
413 | u32 rate_flags; | |
414 | int rate_idx; | |
415 | u8 rts_retry_limit; | |
416 | u8 data_retry_limit; | |
417 | u8 rate_plcp; | |
418 | ||
419 | /* Set retry limit on DATA packets and Probe Responses*/ | |
420 | if (ieee80211_is_probe_resp(fc)) | |
421 | data_retry_limit = 3; | |
422 | else | |
b744cb79 | 423 | data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; |
74bcdb33 WYG |
424 | tx_cmd->data_retry_limit = data_retry_limit; |
425 | ||
426 | /* Set retry limit on RTS packets */ | |
427 | rts_retry_limit = RTS_DFAULT_RETRY_LIMIT; | |
428 | if (data_retry_limit < rts_retry_limit) | |
429 | rts_retry_limit = data_retry_limit; | |
430 | tx_cmd->rts_retry_limit = rts_retry_limit; | |
431 | ||
432 | /* DATA packets will use the uCode station table for rate/antenna | |
433 | * selection */ | |
434 | if (ieee80211_is_data(fc)) { | |
435 | tx_cmd->initial_rate_index = 0; | |
436 | tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; | |
4e308119 WYG |
437 | if (priv->tm_fixed_rate) { |
438 | /* | |
439 | * rate overwrite by testmode | |
440 | * we not only send lq command to change rate | |
441 | * we also re-enforce per data pkt base. | |
442 | */ | |
443 | tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK; | |
444 | memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate, | |
445 | sizeof(tx_cmd->rate_n_flags)); | |
446 | } | |
74bcdb33 WYG |
447 | return; |
448 | } | |
449 | ||
450 | /** | |
451 | * If the current TX rate stored in mac80211 has the MCS bit set, it's | |
452 | * not really a TX rate. Thus, we use the lowest supported rate for | |
453 | * this band. Also use the lowest supported rate if the stored rate | |
454 | * index is invalid. | |
455 | */ | |
456 | rate_idx = info->control.rates[0].idx; | |
457 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || | |
458 | (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) | |
459 | rate_idx = rate_lowest_index(&priv->bands[info->band], | |
460 | info->control.sta); | |
461 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
462 | if (info->band == IEEE80211_BAND_5GHZ) | |
463 | rate_idx += IWL_FIRST_OFDM_RATE; | |
464 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
465 | rate_plcp = iwl_rates[rate_idx].plcp; | |
466 | /* Zero out flags for this packet */ | |
467 | rate_flags = 0; | |
468 | ||
469 | /* Set CCK flag as needed */ | |
470 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
471 | rate_flags |= RATE_MCS_CCK_MSK; | |
472 | ||
74bcdb33 | 473 | /* Set up antennas */ |
7cb1b088 WYG |
474 | if (priv->cfg->bt_params && |
475 | priv->cfg->bt_params->advanced_bt_coexist && | |
476 | priv->bt_full_concurrent) { | |
bee008b7 WYG |
477 | /* operated as 1x1 in full concurrency mode */ |
478 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
479 | first_antenna(priv->hw_params.valid_tx_ant)); | |
480 | } else | |
481 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
0e1654fa | 482 | priv->hw_params.valid_tx_ant); |
74bcdb33 WYG |
483 | rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); |
484 | ||
485 | /* Set the rate in the TX cmd */ | |
486 | tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); | |
487 | } | |
488 | ||
489 | static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, | |
490 | struct ieee80211_tx_info *info, | |
491 | struct iwl_tx_cmd *tx_cmd, | |
492 | struct sk_buff *skb_frag, | |
493 | int sta_id) | |
494 | { | |
495 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
496 | ||
97359d12 JB |
497 | switch (keyconf->cipher) { |
498 | case WLAN_CIPHER_SUITE_CCMP: | |
74bcdb33 WYG |
499 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
500 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
501 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
502 | tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; | |
503 | IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); | |
504 | break; | |
505 | ||
97359d12 | 506 | case WLAN_CIPHER_SUITE_TKIP: |
74bcdb33 | 507 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
523b02ea | 508 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
74bcdb33 WYG |
509 | IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); |
510 | break; | |
511 | ||
97359d12 JB |
512 | case WLAN_CIPHER_SUITE_WEP104: |
513 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
514 | /* fall through */ | |
515 | case WLAN_CIPHER_SUITE_WEP40: | |
74bcdb33 WYG |
516 | tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | |
517 | (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); | |
518 | ||
74bcdb33 WYG |
519 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
520 | ||
521 | IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " | |
522 | "with key %d\n", keyconf->keyidx); | |
523 | break; | |
524 | ||
525 | default: | |
97359d12 | 526 | IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); |
74bcdb33 WYG |
527 | break; |
528 | } | |
529 | } | |
530 | ||
531 | /* | |
532 | * start REPLY_TX command process | |
533 | */ | |
534 | int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) | |
535 | { | |
536 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
537 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
74bcdb33 | 538 | struct iwl_station_priv *sta_priv = NULL; |
a194e324 | 539 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
47c1b496 | 540 | struct iwl_tx_cmd *tx_cmd; |
8d56396a | 541 | int txq_id; |
47c1b496 | 542 | |
74bcdb33 WYG |
543 | u16 seq_number = 0; |
544 | __le16 fc; | |
545 | u8 hdr_len; | |
47c1b496 | 546 | u16 len; |
74bcdb33 | 547 | u8 sta_id; |
74bcdb33 | 548 | u8 tid = 0; |
74bcdb33 | 549 | unsigned long flags; |
2e34034e | 550 | bool is_agg = false; |
74bcdb33 | 551 | |
9b9190d9 JB |
552 | /* |
553 | * If the frame needs to go out off-channel, then | |
554 | * we'll have put the PAN context to that channel, | |
555 | * so make the frame go out there. | |
556 | */ | |
557 | if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) | |
558 | ctx = &priv->contexts[IWL_RXON_CTX_PAN]; | |
559 | else if (info->control.vif) | |
a194e324 JB |
560 | ctx = iwl_rxon_ctx_from_vif(info->control.vif); |
561 | ||
74bcdb33 WYG |
562 | spin_lock_irqsave(&priv->lock, flags); |
563 | if (iwl_is_rfkill(priv)) { | |
564 | IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); | |
2c46f72e | 565 | goto drop_unlock_priv; |
74bcdb33 WYG |
566 | } |
567 | ||
568 | fc = hdr->frame_control; | |
569 | ||
570 | #ifdef CONFIG_IWLWIFI_DEBUG | |
571 | if (ieee80211_is_auth(fc)) | |
572 | IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); | |
573 | else if (ieee80211_is_assoc_req(fc)) | |
574 | IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); | |
575 | else if (ieee80211_is_reassoc_req(fc)) | |
576 | IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); | |
577 | #endif | |
578 | ||
579 | hdr_len = ieee80211_hdrlen(fc); | |
580 | ||
bfd36103 SG |
581 | /* For management frames use broadcast id to do not break aggregation */ |
582 | if (!ieee80211_is_data(fc)) | |
583 | sta_id = ctx->bcast_sta_id; | |
584 | else { | |
585 | /* Find index into station table for destination station */ | |
586 | sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta); | |
587 | if (sta_id == IWL_INVALID_STATION) { | |
588 | IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", | |
589 | hdr->addr1); | |
e00cf3b9 | 590 | goto drop_unlock_priv; |
bfd36103 | 591 | } |
74bcdb33 WYG |
592 | } |
593 | ||
594 | IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); | |
595 | ||
47c1b496 EG |
596 | if (info->control.sta) |
597 | sta_priv = (void *)info->control.sta->drv_priv; | |
74bcdb33 | 598 | |
67158b67 JB |
599 | if (sta_priv && sta_priv->asleep && |
600 | (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)) { | |
74bcdb33 WYG |
601 | /* |
602 | * This sends an asynchronous command to the device, | |
603 | * but we can rely on it being processed before the | |
604 | * next frame is processed -- and the next frame to | |
605 | * this station is the one that will consume this | |
606 | * counter. | |
607 | * For now set the counter to just 1 since we do not | |
608 | * support uAPSD yet. | |
609 | */ | |
610 | iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); | |
611 | } | |
612 | ||
e72f368b JB |
613 | /* |
614 | * Send this frame after DTIM -- there's a special queue | |
615 | * reserved for this for contexts that support AP mode. | |
616 | */ | |
617 | if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { | |
618 | txq_id = ctx->mcast_queue; | |
619 | /* | |
620 | * The microcode will clear the more data | |
621 | * bit in the last frame it transmits. | |
622 | */ | |
623 | hdr->frame_control |= | |
624 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
625 | } else | |
626 | txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)]; | |
9c5ac091 RC |
627 | |
628 | /* irqs already disabled/saved above when locking priv->lock */ | |
629 | spin_lock(&priv->sta_lock); | |
630 | ||
74bcdb33 | 631 | if (ieee80211_is_data_qos(fc)) { |
47c1b496 | 632 | u8 *qc = NULL; |
74bcdb33 WYG |
633 | qc = ieee80211_get_qos_ctl(hdr); |
634 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
2c46f72e JB |
635 | |
636 | if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) | |
637 | goto drop_unlock_sta; | |
638 | ||
74bcdb33 WYG |
639 | seq_number = priv->stations[sta_id].tid[tid].seq_number; |
640 | seq_number &= IEEE80211_SCTL_SEQ; | |
641 | hdr->seq_ctrl = hdr->seq_ctrl & | |
642 | cpu_to_le16(IEEE80211_SCTL_FRAG); | |
643 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
644 | seq_number += 0x10; | |
645 | /* aggregation is on for this <sta,tid> */ | |
646 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
647 | priv->stations[sta_id].tid[tid].agg.state == IWL_AGG_ON) { | |
648 | txq_id = priv->stations[sta_id].tid[tid].agg.txq_id; | |
2e34034e | 649 | is_agg = true; |
74bcdb33 WYG |
650 | } |
651 | } | |
652 | ||
47c1b496 EG |
653 | tx_cmd = trans_get_tx_cmd(priv, txq_id); |
654 | if (unlikely(!tx_cmd)) | |
2c46f72e | 655 | goto drop_unlock_sta; |
74bcdb33 | 656 | |
74bcdb33 WYG |
657 | /* Copy MAC header from skb into command buffer */ |
658 | memcpy(tx_cmd->hdr, hdr, hdr_len); | |
659 | ||
74bcdb33 WYG |
660 | /* Total # bytes to be transmitted */ |
661 | len = (u16)skb->len; | |
662 | tx_cmd->len = cpu_to_le16(len); | |
663 | ||
664 | if (info->control.hw_key) | |
665 | iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id); | |
666 | ||
667 | /* TODO need this for burst mode later on */ | |
d44ae69e | 668 | iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); |
74bcdb33 WYG |
669 | iwl_dbg_log_tx_data_frame(priv, len, hdr); |
670 | ||
671 | iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc); | |
672 | ||
673 | iwl_update_stats(priv, true, fc, len); | |
74bcdb33 | 674 | |
47c1b496 EG |
675 | if (trans_tx(priv, skb, tx_cmd, txq_id, fc, is_agg, ctx)) |
676 | goto drop_unlock_sta; | |
2c46f72e JB |
677 | |
678 | if (ieee80211_is_data_qos(fc)) { | |
679 | priv->stations[sta_id].tid[tid].tfds_in_queue++; | |
680 | if (!ieee80211_has_morefrags(fc)) | |
681 | priv->stations[sta_id].tid[tid].seq_number = seq_number; | |
682 | } | |
683 | ||
684 | spin_unlock(&priv->sta_lock); | |
74bcdb33 WYG |
685 | spin_unlock_irqrestore(&priv->lock, flags); |
686 | ||
2e34034e JB |
687 | /* |
688 | * Avoid atomic ops if it isn't an associated client. | |
689 | * Also, if this is a packet for aggregation, don't | |
690 | * increase the counter because the ucode will stop | |
691 | * aggregation queues when their respective station | |
692 | * goes to sleep. | |
693 | */ | |
694 | if (sta_priv && sta_priv->client && !is_agg) | |
74bcdb33 WYG |
695 | atomic_inc(&sta_priv->pending_frames); |
696 | ||
74bcdb33 WYG |
697 | return 0; |
698 | ||
2c46f72e JB |
699 | drop_unlock_sta: |
700 | spin_unlock(&priv->sta_lock); | |
701 | drop_unlock_priv: | |
74bcdb33 WYG |
702 | spin_unlock_irqrestore(&priv->lock, flags); |
703 | return -1; | |
704 | } | |
705 | ||
74bcdb33 WYG |
706 | /* |
707 | * Find first available (lowest unused) Tx Queue, mark it "active". | |
708 | * Called only when finding queue for aggregation. | |
709 | * Should never return anything < 7, because they should already | |
710 | * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) | |
711 | */ | |
712 | static int iwlagn_txq_ctx_activate_free(struct iwl_priv *priv) | |
713 | { | |
714 | int txq_id; | |
715 | ||
716 | for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) | |
717 | if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) | |
718 | return txq_id; | |
719 | return -1; | |
720 | } | |
721 | ||
832f47e3 | 722 | int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 723 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) |
74bcdb33 WYG |
724 | { |
725 | int sta_id; | |
726 | int tx_fifo; | |
727 | int txq_id; | |
728 | int ret; | |
729 | unsigned long flags; | |
730 | struct iwl_tid_data *tid_data; | |
731 | ||
e72f368b | 732 | tx_fifo = get_fifo_from_tid(iwl_rxon_ctx_from_vif(vif), tid); |
74bcdb33 WYG |
733 | if (unlikely(tx_fifo < 0)) |
734 | return tx_fifo; | |
735 | ||
5bc9890f WYG |
736 | IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", |
737 | sta->addr, tid); | |
74bcdb33 | 738 | |
619753ff | 739 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
740 | if (sta_id == IWL_INVALID_STATION) { |
741 | IWL_ERR(priv, "Start AGG on invalid station\n"); | |
742 | return -ENXIO; | |
743 | } | |
744 | if (unlikely(tid >= MAX_TID_COUNT)) | |
745 | return -EINVAL; | |
746 | ||
747 | if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) { | |
748 | IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); | |
749 | return -ENXIO; | |
750 | } | |
751 | ||
752 | txq_id = iwlagn_txq_ctx_activate_free(priv); | |
753 | if (txq_id == -1) { | |
754 | IWL_ERR(priv, "No free aggregation queue available\n"); | |
755 | return -ENXIO; | |
756 | } | |
757 | ||
758 | spin_lock_irqsave(&priv->sta_lock, flags); | |
759 | tid_data = &priv->stations[sta_id].tid[tid]; | |
760 | *ssn = SEQ_TO_SN(tid_data->seq_number); | |
761 | tid_data->agg.txq_id = txq_id; | |
c8823ec1 | 762 | tid_data->agg.tx_fifo = tx_fifo; |
ea9b307f | 763 | iwl_set_swq_id(&priv->txq[txq_id], get_ac_from_tid(tid), txq_id); |
74bcdb33 WYG |
764 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
765 | ||
c8823ec1 | 766 | ret = iwlagn_txq_agg_enable(priv, txq_id, sta_id, tid); |
74bcdb33 WYG |
767 | if (ret) |
768 | return ret; | |
769 | ||
9c5ac091 RC |
770 | spin_lock_irqsave(&priv->sta_lock, flags); |
771 | tid_data = &priv->stations[sta_id].tid[tid]; | |
74bcdb33 WYG |
772 | if (tid_data->tfds_in_queue == 0) { |
773 | IWL_DEBUG_HT(priv, "HW queue is empty\n"); | |
774 | tid_data->agg.state = IWL_AGG_ON; | |
619753ff | 775 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
74bcdb33 WYG |
776 | } else { |
777 | IWL_DEBUG_HT(priv, "HW queue is NOT empty: %d packets in HW queue\n", | |
778 | tid_data->tfds_in_queue); | |
779 | tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
780 | } | |
9c5ac091 | 781 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
74bcdb33 WYG |
782 | return ret; |
783 | } | |
784 | ||
832f47e3 | 785 | int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 786 | struct ieee80211_sta *sta, u16 tid) |
74bcdb33 | 787 | { |
18c121d7 | 788 | int tx_fifo_id, txq_id, sta_id, ssn; |
74bcdb33 WYG |
789 | struct iwl_tid_data *tid_data; |
790 | int write_ptr, read_ptr; | |
791 | unsigned long flags; | |
792 | ||
e72f368b | 793 | tx_fifo_id = get_fifo_from_tid(iwl_rxon_ctx_from_vif(vif), tid); |
74bcdb33 WYG |
794 | if (unlikely(tx_fifo_id < 0)) |
795 | return tx_fifo_id; | |
796 | ||
619753ff | 797 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
798 | |
799 | if (sta_id == IWL_INVALID_STATION) { | |
800 | IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); | |
801 | return -ENXIO; | |
802 | } | |
803 | ||
9c5ac091 RC |
804 | spin_lock_irqsave(&priv->sta_lock, flags); |
805 | ||
74bcdb33 WYG |
806 | tid_data = &priv->stations[sta_id].tid[tid]; |
807 | ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; | |
808 | txq_id = tid_data->agg.txq_id; | |
18c121d7 JB |
809 | |
810 | switch (priv->stations[sta_id].tid[tid].agg.state) { | |
811 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
812 | /* | |
813 | * This can happen if the peer stops aggregation | |
814 | * again before we've had a chance to drain the | |
815 | * queue we selected previously, i.e. before the | |
816 | * session was really started completely. | |
817 | */ | |
818 | IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); | |
819 | goto turn_off; | |
820 | case IWL_AGG_ON: | |
821 | break; | |
822 | default: | |
823 | IWL_WARN(priv, "Stopping AGG while state not ON or starting\n"); | |
824 | } | |
825 | ||
74bcdb33 WYG |
826 | write_ptr = priv->txq[txq_id].q.write_ptr; |
827 | read_ptr = priv->txq[txq_id].q.read_ptr; | |
828 | ||
829 | /* The queue is not empty */ | |
830 | if (write_ptr != read_ptr) { | |
831 | IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n"); | |
832 | priv->stations[sta_id].tid[tid].agg.state = | |
833 | IWL_EMPTYING_HW_QUEUE_DELBA; | |
9c5ac091 | 834 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
74bcdb33 WYG |
835 | return 0; |
836 | } | |
837 | ||
838 | IWL_DEBUG_HT(priv, "HW queue is empty\n"); | |
18c121d7 | 839 | turn_off: |
74bcdb33 WYG |
840 | priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF; |
841 | ||
9c5ac091 RC |
842 | /* do not restore/save irqs */ |
843 | spin_unlock(&priv->sta_lock); | |
844 | spin_lock(&priv->lock); | |
845 | ||
74bcdb33 WYG |
846 | /* |
847 | * the only reason this call can fail is queue number out of range, | |
848 | * which can happen if uCode is reloaded and all the station | |
849 | * information are lost. if it is outside the range, there is no need | |
850 | * to deactivate the uCode queue, just return "success" to allow | |
851 | * mac80211 to clean up it own data. | |
852 | */ | |
7ffef13d | 853 | iwlagn_txq_agg_disable(priv, txq_id, ssn, tx_fifo_id); |
74bcdb33 WYG |
854 | spin_unlock_irqrestore(&priv->lock, flags); |
855 | ||
619753ff | 856 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
74bcdb33 WYG |
857 | |
858 | return 0; | |
859 | } | |
860 | ||
861 | int iwlagn_txq_check_empty(struct iwl_priv *priv, | |
862 | int sta_id, u8 tid, int txq_id) | |
863 | { | |
864 | struct iwl_queue *q = &priv->txq[txq_id].q; | |
865 | u8 *addr = priv->stations[sta_id].sta.sta.addr; | |
866 | struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid]; | |
8bd413e6 JB |
867 | struct iwl_rxon_context *ctx; |
868 | ||
869 | ctx = &priv->contexts[priv->stations[sta_id].ctxid]; | |
74bcdb33 | 870 | |
a24d52f3 | 871 | lockdep_assert_held(&priv->sta_lock); |
9c5ac091 | 872 | |
74bcdb33 WYG |
873 | switch (priv->stations[sta_id].tid[tid].agg.state) { |
874 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
875 | /* We are reclaiming the last packet of the */ | |
876 | /* aggregated HW queue */ | |
877 | if ((txq_id == tid_data->agg.txq_id) && | |
878 | (q->read_ptr == q->write_ptr)) { | |
879 | u16 ssn = SEQ_TO_SN(tid_data->seq_number); | |
e72f368b | 880 | int tx_fifo = get_fifo_from_tid(ctx, tid); |
74bcdb33 | 881 | IWL_DEBUG_HT(priv, "HW queue empty: continue DELBA flow\n"); |
7ffef13d | 882 | iwlagn_txq_agg_disable(priv, txq_id, ssn, tx_fifo); |
74bcdb33 | 883 | tid_data->agg.state = IWL_AGG_OFF; |
8bd413e6 | 884 | ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid); |
74bcdb33 WYG |
885 | } |
886 | break; | |
887 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
888 | /* We are reclaiming the last packet of the queue */ | |
889 | if (tid_data->tfds_in_queue == 0) { | |
890 | IWL_DEBUG_HT(priv, "HW queue empty: continue ADDBA flow\n"); | |
891 | tid_data->agg.state = IWL_AGG_ON; | |
8bd413e6 | 892 | ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid); |
74bcdb33 WYG |
893 | } |
894 | break; | |
895 | } | |
9c5ac091 | 896 | |
74bcdb33 WYG |
897 | return 0; |
898 | } | |
899 | ||
2e34034e JB |
900 | static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, |
901 | struct iwl_rxon_context *ctx, | |
902 | const u8 *addr1) | |
74bcdb33 | 903 | { |
74bcdb33 WYG |
904 | struct ieee80211_sta *sta; |
905 | struct iwl_station_priv *sta_priv; | |
906 | ||
6db6340c | 907 | rcu_read_lock(); |
2e34034e | 908 | sta = ieee80211_find_sta(ctx->vif, addr1); |
74bcdb33 WYG |
909 | if (sta) { |
910 | sta_priv = (void *)sta->drv_priv; | |
911 | /* avoid atomic ops if this isn't a client */ | |
912 | if (sta_priv->client && | |
913 | atomic_dec_return(&sta_priv->pending_frames) == 0) | |
914 | ieee80211_sta_block_awake(priv->hw, sta, false); | |
915 | } | |
6db6340c | 916 | rcu_read_unlock(); |
2e34034e JB |
917 | } |
918 | ||
919 | static void iwlagn_tx_status(struct iwl_priv *priv, struct iwl_tx_info *tx_info, | |
920 | bool is_agg) | |
921 | { | |
922 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx_info->skb->data; | |
923 | ||
924 | if (!is_agg) | |
925 | iwlagn_non_agg_tx_status(priv, tx_info->ctx, hdr->addr1); | |
74bcdb33 | 926 | |
8bd413e6 | 927 | ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb); |
74bcdb33 WYG |
928 | } |
929 | ||
930 | int iwlagn_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index) | |
931 | { | |
932 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; | |
933 | struct iwl_queue *q = &txq->q; | |
934 | struct iwl_tx_info *tx_info; | |
935 | int nfreed = 0; | |
936 | struct ieee80211_hdr *hdr; | |
937 | ||
938 | if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) { | |
2e5d04da DH |
939 | IWL_ERR(priv, "%s: Read index for DMA queue txq id (%d), " |
940 | "index %d is out of range [0-%d] %d %d.\n", __func__, | |
941 | txq_id, index, q->n_bd, q->write_ptr, q->read_ptr); | |
74bcdb33 WYG |
942 | return 0; |
943 | } | |
944 | ||
945 | for (index = iwl_queue_inc_wrap(index, q->n_bd); | |
946 | q->read_ptr != index; | |
947 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) { | |
948 | ||
949 | tx_info = &txq->txb[txq->q.read_ptr]; | |
b2502698 SG |
950 | |
951 | if (WARN_ON_ONCE(tx_info->skb == NULL)) | |
952 | continue; | |
74bcdb33 | 953 | |
ff0d91c3 | 954 | hdr = (struct ieee80211_hdr *)tx_info->skb->data; |
b2502698 | 955 | if (ieee80211_is_data_qos(hdr->frame_control)) |
74bcdb33 | 956 | nfreed++; |
b2502698 SG |
957 | |
958 | iwlagn_tx_status(priv, tx_info, | |
959 | txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); | |
ff0d91c3 | 960 | tx_info->skb = NULL; |
74bcdb33 | 961 | |
94b00658 | 962 | iwlagn_txq_inval_byte_cnt_tbl(priv, txq); |
74bcdb33 | 963 | |
1359ca4f | 964 | iwlagn_txq_free_tfd(priv, txq, txq->q.read_ptr); |
74bcdb33 WYG |
965 | } |
966 | return nfreed; | |
967 | } | |
968 | ||
969 | /** | |
970 | * iwlagn_tx_status_reply_compressed_ba - Update tx status from block-ack | |
971 | * | |
972 | * Go through block-ack's bitmap of ACK'd frames, update driver's record of | |
973 | * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. | |
974 | */ | |
975 | static int iwlagn_tx_status_reply_compressed_ba(struct iwl_priv *priv, | |
976 | struct iwl_ht_agg *agg, | |
977 | struct iwl_compressed_ba_resp *ba_resp) | |
978 | ||
979 | { | |
d0eb6334 | 980 | int sh; |
74bcdb33 WYG |
981 | u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); |
982 | u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); | |
74bcdb33 | 983 | struct ieee80211_tx_info *info; |
d0eb6334 | 984 | u64 bitmap, sent_bitmap; |
74bcdb33 WYG |
985 | |
986 | if (unlikely(!agg->wait_for_ba)) { | |
822395b5 DF |
987 | if (unlikely(ba_resp->bitmap)) |
988 | IWL_ERR(priv, "Received BA when not expected\n"); | |
74bcdb33 WYG |
989 | return -EINVAL; |
990 | } | |
991 | ||
992 | /* Mark that the expected block-ack response arrived */ | |
993 | agg->wait_for_ba = 0; | |
994 | IWL_DEBUG_TX_REPLY(priv, "BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); | |
995 | ||
996 | /* Calculate shift to align block-ack bits with our Tx window bits */ | |
997 | sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl >> 4); | |
d0eb6334 | 998 | if (sh < 0) |
74bcdb33 WYG |
999 | sh += 0x100; |
1000 | ||
d0eb6334 DH |
1001 | /* |
1002 | * Check for success or failure according to the | |
1003 | * transmitted bitmap and block-ack bitmap | |
1004 | */ | |
1005 | bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; | |
1006 | sent_bitmap = bitmap & agg->bitmap; | |
1007 | ||
1008 | /* Sanity check values reported by uCode */ | |
1009 | if (ba_resp->txed_2_done > ba_resp->txed) { | |
1010 | IWL_DEBUG_TX_REPLY(priv, | |
1011 | "bogus sent(%d) and ack(%d) count\n", | |
1012 | ba_resp->txed, ba_resp->txed_2_done); | |
8829c9e2 | 1013 | /* |
d0eb6334 DH |
1014 | * set txed_2_done = txed, |
1015 | * so it won't impact rate scale | |
8829c9e2 | 1016 | */ |
d0eb6334 DH |
1017 | ba_resp->txed = ba_resp->txed_2_done; |
1018 | } | |
1019 | IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n", | |
1020 | ba_resp->txed, ba_resp->txed_2_done); | |
9decde95 | 1021 | |
d0eb6334 DH |
1022 | /* Find the first ACKed frame to store the TX status */ |
1023 | while (sent_bitmap && !(sent_bitmap & 1)) { | |
1024 | agg->start_idx = (agg->start_idx + 1) & 0xff; | |
1025 | sent_bitmap >>= 1; | |
74bcdb33 | 1026 | } |
9decde95 | 1027 | |
ff0d91c3 | 1028 | info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb); |
74bcdb33 WYG |
1029 | memset(&info->status, 0, sizeof(info->status)); |
1030 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1031 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
d0eb6334 DH |
1032 | info->status.ampdu_ack_len = ba_resp->txed_2_done; |
1033 | info->status.ampdu_len = ba_resp->txed; | |
8d801080 | 1034 | iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, info); |
74bcdb33 | 1035 | |
74bcdb33 WYG |
1036 | return 0; |
1037 | } | |
1038 | ||
8d801080 WYG |
1039 | /** |
1040 | * translate ucode response to mac80211 tx status control values | |
1041 | */ | |
1042 | void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, | |
1043 | struct ieee80211_tx_info *info) | |
1044 | { | |
1045 | struct ieee80211_tx_rate *r = &info->control.rates[0]; | |
1046 | ||
1047 | info->antenna_sel_tx = | |
1048 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
1049 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
1050 | r->flags |= IEEE80211_TX_RC_MCS; | |
1051 | if (rate_n_flags & RATE_MCS_GF_MSK) | |
1052 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
1053 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
1054 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
1055 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
1056 | r->flags |= IEEE80211_TX_RC_DUP_DATA; | |
1057 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
1058 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
1059 | r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); | |
1060 | } | |
1061 | ||
74bcdb33 WYG |
1062 | /** |
1063 | * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA | |
1064 | * | |
1065 | * Handles block-acknowledge notification from device, which reports success | |
1066 | * of frames sent via aggregation. | |
1067 | */ | |
1068 | void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, | |
1069 | struct iwl_rx_mem_buffer *rxb) | |
1070 | { | |
1071 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1072 | struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; | |
1073 | struct iwl_tx_queue *txq = NULL; | |
1074 | struct iwl_ht_agg *agg; | |
1075 | int index; | |
1076 | int sta_id; | |
1077 | int tid; | |
9c5ac091 | 1078 | unsigned long flags; |
74bcdb33 WYG |
1079 | |
1080 | /* "flow" corresponds to Tx queue */ | |
1081 | u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); | |
1082 | ||
1083 | /* "ssn" is start of block-ack Tx window, corresponds to index | |
1084 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
1085 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); | |
1086 | ||
1087 | if (scd_flow >= priv->hw_params.max_txq_num) { | |
1088 | IWL_ERR(priv, | |
1089 | "BUG_ON scd_flow is bigger than number of queues\n"); | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | txq = &priv->txq[scd_flow]; | |
1094 | sta_id = ba_resp->sta_id; | |
1095 | tid = ba_resp->tid; | |
1096 | agg = &priv->stations[sta_id].tid[tid].agg; | |
b561e827 | 1097 | if (unlikely(agg->txq_id != scd_flow)) { |
735df29a WYG |
1098 | /* |
1099 | * FIXME: this is a uCode bug which need to be addressed, | |
1100 | * log the information and return for now! | |
1101 | * since it is possible happen very often and in order | |
1102 | * not to fill the syslog, don't enable the logging by default | |
1103 | */ | |
1104 | IWL_DEBUG_TX_REPLY(priv, | |
1105 | "BA scd_flow %d does not match txq_id %d\n", | |
b561e827 SZ |
1106 | scd_flow, agg->txq_id); |
1107 | return; | |
1108 | } | |
74bcdb33 WYG |
1109 | |
1110 | /* Find index just before block-ack window */ | |
1111 | index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); | |
1112 | ||
9c5ac091 | 1113 | spin_lock_irqsave(&priv->sta_lock, flags); |
74bcdb33 WYG |
1114 | |
1115 | IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " | |
1116 | "sta_id = %d\n", | |
1117 | agg->wait_for_ba, | |
1118 | (u8 *) &ba_resp->sta_addr_lo32, | |
1119 | ba_resp->sta_id); | |
1120 | IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = " | |
1121 | "%d, scd_ssn = %d\n", | |
1122 | ba_resp->tid, | |
1123 | ba_resp->seq_ctl, | |
1124 | (unsigned long long)le64_to_cpu(ba_resp->bitmap), | |
1125 | ba_resp->scd_flow, | |
1126 | ba_resp->scd_ssn); | |
91dd6c27 | 1127 | IWL_DEBUG_TX_REPLY(priv, "DAT start_idx = %d, bitmap = 0x%llx\n", |
74bcdb33 WYG |
1128 | agg->start_idx, |
1129 | (unsigned long long)agg->bitmap); | |
1130 | ||
1131 | /* Update driver's record of ACK vs. not for each frame in window */ | |
1132 | iwlagn_tx_status_reply_compressed_ba(priv, agg, ba_resp); | |
1133 | ||
1134 | /* Release all TFDs before the SSN, i.e. all TFDs in front of | |
1135 | * block-ack window (we assume that they've been successfully | |
1136 | * transmitted ... if not, it's too late anyway). */ | |
1137 | if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { | |
1138 | /* calculate mac80211 ampdu sw queue to wake */ | |
1139 | int freed = iwlagn_tx_queue_reclaim(priv, scd_flow, index); | |
1140 | iwl_free_tfds_in_queue(priv, sta_id, tid, freed); | |
1141 | ||
1142 | if ((iwl_queue_space(&txq->q) > txq->q.low_mark) && | |
1143 | priv->mac80211_registered && | |
1144 | (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) | |
549a04e0 | 1145 | iwl_wake_queue(priv, txq); |
74bcdb33 WYG |
1146 | |
1147 | iwlagn_txq_check_empty(priv, sta_id, tid, scd_flow); | |
1148 | } | |
9c5ac091 RC |
1149 | |
1150 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
74bcdb33 | 1151 | } |
69fdb710 JB |
1152 | |
1153 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1154 | const char *iwl_get_tx_fail_reason(u32 status) | |
1155 | { | |
1156 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
1157 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
1158 | ||
1159 | switch (status & TX_STATUS_MSK) { | |
1160 | case TX_STATUS_SUCCESS: | |
1161 | return "SUCCESS"; | |
1162 | TX_STATUS_POSTPONE(DELAY); | |
1163 | TX_STATUS_POSTPONE(FEW_BYTES); | |
1164 | TX_STATUS_POSTPONE(BT_PRIO); | |
1165 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
1166 | TX_STATUS_POSTPONE(CALC_TTAK); | |
1167 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
1168 | TX_STATUS_FAIL(SHORT_LIMIT); | |
1169 | TX_STATUS_FAIL(LONG_LIMIT); | |
1170 | TX_STATUS_FAIL(FIFO_UNDERRUN); | |
1171 | TX_STATUS_FAIL(DRAIN_FLOW); | |
1172 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
1173 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
1174 | TX_STATUS_FAIL(DEST_PS); | |
1175 | TX_STATUS_FAIL(HOST_ABORTED); | |
1176 | TX_STATUS_FAIL(BT_RETRY); | |
1177 | TX_STATUS_FAIL(STA_INVALID); | |
1178 | TX_STATUS_FAIL(FRAG_DROPPED); | |
1179 | TX_STATUS_FAIL(TID_DISABLE); | |
1180 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
1181 | TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); | |
1182 | TX_STATUS_FAIL(PASSIVE_NO_RX); | |
1183 | TX_STATUS_FAIL(NO_BEACON_ON_RADAR); | |
1184 | } | |
1185 | ||
1186 | return "UNKNOWN"; | |
1187 | ||
1188 | #undef TX_STATUS_FAIL | |
1189 | #undef TX_STATUS_POSTPONE | |
1190 | } | |
1191 | #endif /* CONFIG_IWLWIFI_DEBUG */ |