Commit | Line | Data |
---|---|---|
f5fc0f86 LC |
1 | /* |
2 | * This file is part of wl1271 | |
3 | * | |
4 | * Copyright (C) 2009 Nokia Corporation | |
5 | * | |
6 | * Contact: Luciano Coelho <luciano.coelho@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
c6c8a65d | 26 | #include <linux/etherdevice.h> |
f5fc0f86 | 27 | |
00d20100 SL |
28 | #include "wl12xx.h" |
29 | #include "io.h" | |
30 | #include "reg.h" | |
31 | #include "ps.h" | |
32 | #include "tx.h" | |
56d4f8f6 | 33 | #include "event.h" |
f5fc0f86 | 34 | |
536129c8 EP |
35 | static int wl1271_set_default_wep_key(struct wl1271 *wl, |
36 | struct wl12xx_vif *wlvif, u8 id) | |
7f179b46 AN |
37 | { |
38 | int ret; | |
536129c8 | 39 | bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS); |
7f179b46 AN |
40 | |
41 | if (is_ap) | |
c690ec81 | 42 | ret = wl12xx_cmd_set_default_wep_key(wl, id, |
a8ab39a4 | 43 | wlvif->ap.bcast_hlid); |
7f179b46 | 44 | else |
154da67c | 45 | ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid); |
7f179b46 AN |
46 | |
47 | if (ret < 0) | |
48 | return ret; | |
49 | ||
50 | wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); | |
51 | return 0; | |
52 | } | |
53 | ||
25eeb9e3 | 54 | static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) |
f5fc0f86 | 55 | { |
25eeb9e3 IY |
56 | int id; |
57 | ||
58 | id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS); | |
59 | if (id >= ACX_TX_DESCRIPTORS) | |
60 | return -EBUSY; | |
61 | ||
62 | __set_bit(id, wl->tx_frames_map); | |
63 | wl->tx_frames[id] = skb; | |
64 | wl->tx_frames_cnt++; | |
65 | return id; | |
66 | } | |
f5fc0f86 | 67 | |
25eeb9e3 IY |
68 | static void wl1271_free_tx_id(struct wl1271 *wl, int id) |
69 | { | |
70 | if (__test_and_clear_bit(id, wl->tx_frames_map)) { | |
ef2e3004 IY |
71 | if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS)) |
72 | clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
73 | ||
25eeb9e3 IY |
74 | wl->tx_frames[id] = NULL; |
75 | wl->tx_frames_cnt--; | |
76 | } | |
f5fc0f86 LC |
77 | } |
78 | ||
c5745187 | 79 | static int wl1271_tx_update_filters(struct wl1271 *wl, |
7edebf56 EP |
80 | struct wl12xx_vif *wlvif, |
81 | struct sk_buff *skb) | |
c5745187 OBC |
82 | { |
83 | struct ieee80211_hdr *hdr; | |
251c177f | 84 | int ret; |
c5745187 | 85 | |
df4c849f | 86 | hdr = (struct ieee80211_hdr *)skb->data; |
c5745187 OBC |
87 | |
88 | /* | |
89 | * stop bssid-based filtering before transmitting authentication | |
90 | * requests. this way the hw will never drop authentication | |
91 | * responses coming from BSSIDs it isn't familiar with (e.g. on | |
92 | * roaming) | |
93 | */ | |
94 | if (!ieee80211_is_auth(hdr->frame_control)) | |
95 | return 0; | |
96 | ||
afaf8bdb | 97 | if (wlvif->dev_hlid != WL12XX_INVALID_LINK_ID) |
251c177f EP |
98 | goto out; |
99 | ||
100 | wl1271_debug(DEBUG_CMD, "starting device role for roaming"); | |
7edebf56 | 101 | ret = wl12xx_cmd_role_start_dev(wl, wlvif); |
251c177f EP |
102 | if (ret < 0) |
103 | goto out; | |
104 | ||
7edebf56 | 105 | ret = wl12xx_roc(wl, wlvif->dev_role_id); |
251c177f EP |
106 | if (ret < 0) |
107 | goto out; | |
108 | out: | |
08c1d1c7 | 109 | return 0; |
c5745187 OBC |
110 | } |
111 | ||
99a2775d AN |
112 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
113 | struct sk_buff *skb) | |
114 | { | |
115 | struct ieee80211_hdr *hdr; | |
116 | ||
117 | /* | |
118 | * add the station to the known list before transmitting the | |
119 | * authentication response. this way it won't get de-authed by FW | |
120 | * when transmitting too soon. | |
121 | */ | |
122 | hdr = (struct ieee80211_hdr *)(skb->data + | |
123 | sizeof(struct wl1271_tx_hw_descr)); | |
124 | if (ieee80211_is_auth(hdr->frame_control)) | |
125 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
126 | } | |
127 | ||
c7ffb902 EP |
128 | static void wl1271_tx_regulate_link(struct wl1271 *wl, |
129 | struct wl12xx_vif *wlvif, | |
130 | u8 hlid) | |
b622d992 | 131 | { |
da03209e | 132 | bool fw_ps, single_sta; |
9b17f1b3 | 133 | u8 tx_pkts; |
b622d992 | 134 | |
c7ffb902 | 135 | if (WARN_ON(!test_bit(hlid, wlvif->links_map))) |
b622d992 AN |
136 | return; |
137 | ||
138 | fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map); | |
9b17f1b3 | 139 | tx_pkts = wl->links[hlid].allocated_pkts; |
da03209e | 140 | single_sta = (wl->active_sta_count == 1); |
b622d992 AN |
141 | |
142 | /* | |
143 | * if in FW PS and there is enough data in FW we can put the link | |
144 | * into high-level PS and clean out its TX queues. | |
da03209e AN |
145 | * Make an exception if this is the only connected station. In this |
146 | * case FW-memory congestion is not a problem. | |
b622d992 | 147 | */ |
da03209e | 148 | if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS) |
b622d992 AN |
149 | wl1271_ps_link_start(wl, hlid, true); |
150 | } | |
151 | ||
f8e0af6b | 152 | bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) |
f4df1bd5 EP |
153 | { |
154 | return wl->dummy_packet == skb; | |
155 | } | |
156 | ||
a8ab39a4 EP |
157 | u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
158 | struct sk_buff *skb) | |
a8c0ddb5 AN |
159 | { |
160 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
161 | ||
162 | if (control->control.sta) { | |
163 | struct wl1271_station *wl_sta; | |
164 | ||
165 | wl_sta = (struct wl1271_station *) | |
166 | control->control.sta->drv_priv; | |
167 | return wl_sta->hlid; | |
168 | } else { | |
169 | struct ieee80211_hdr *hdr; | |
170 | ||
f4df1bd5 EP |
171 | if (!test_bit(WL1271_FLAG_AP_STARTED, &wl->flags)) |
172 | return wl->system_hlid; | |
173 | ||
a8c0ddb5 AN |
174 | hdr = (struct ieee80211_hdr *)skb->data; |
175 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
a8ab39a4 | 176 | return wlvif->ap.global_hlid; |
a8c0ddb5 | 177 | else |
a8ab39a4 | 178 | return wlvif->ap.bcast_hlid; |
a8c0ddb5 AN |
179 | } |
180 | } | |
181 | ||
536129c8 EP |
182 | static u8 wl1271_tx_get_hlid(struct wl1271 *wl, struct ieee80211_vif *vif, |
183 | struct sk_buff *skb) | |
f4df1bd5 | 184 | { |
df4c849f | 185 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
536129c8 EP |
186 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); |
187 | ||
df4c849f | 188 | |
f4df1bd5 EP |
189 | if (wl12xx_is_dummy_packet(wl, skb)) |
190 | return wl->system_hlid; | |
191 | ||
536129c8 | 192 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) |
a8ab39a4 | 193 | return wl12xx_tx_get_hlid_ap(wl, wlvif, skb); |
f4df1bd5 | 194 | |
7edebf56 | 195 | wl1271_tx_update_filters(wl, wlvif, skb); |
df4c849f EP |
196 | |
197 | if ((test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags) || | |
198 | test_bit(WL1271_FLAG_IBSS_JOINED, &wl->flags)) && | |
199 | !ieee80211_is_auth(hdr->frame_control) && | |
200 | !ieee80211_is_assoc_req(hdr->frame_control)) | |
154da67c | 201 | return wlvif->sta.hlid; |
f4df1bd5 | 202 | else |
afaf8bdb | 203 | return wlvif->dev_hlid; |
f4df1bd5 EP |
204 | } |
205 | ||
0da13da7 IY |
206 | static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl, |
207 | unsigned int packet_length) | |
208 | { | |
209 | if (wl->quirks & WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT) | |
210 | return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); | |
211 | else | |
212 | return ALIGN(packet_length, WL1271_TX_ALIGN_TO); | |
213 | } | |
214 | ||
536129c8 EP |
215 | static int wl1271_tx_allocate(struct wl1271 *wl, struct ieee80211_vif *vif, |
216 | struct sk_buff *skb, u32 extra, u32 buf_offset, | |
217 | u8 hlid) | |
f5fc0f86 | 218 | { |
536129c8 | 219 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); |
f5fc0f86 LC |
220 | struct wl1271_tx_hw_descr *desc; |
221 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 222 | u32 len; |
5c9417f1 | 223 | u32 total_blocks; |
742246f8 | 224 | int id, ret = -EBUSY, ac; |
e9eb8cbe | 225 | u32 spare_blocks = wl->tx_spare_blocks; |
f5fc0f86 | 226 | |
a19606b4 | 227 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 228 | return -EAGAIN; |
a19606b4 | 229 | |
f5fc0f86 | 230 | /* allocate free identifier for the packet */ |
25eeb9e3 | 231 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
232 | if (id < 0) |
233 | return id; | |
234 | ||
235 | /* approximate the number of blocks required for this packet | |
236 | in the firmware */ | |
0da13da7 | 237 | len = wl12xx_calc_packet_alignment(wl, total_len); |
48a61477 | 238 | |
e9eb8cbe GE |
239 | /* in case of a dummy packet, use default amount of spare mem blocks */ |
240 | if (unlikely(wl12xx_is_dummy_packet(wl, skb))) | |
241 | spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT; | |
242 | ||
48a61477 | 243 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + |
e7ddf549 | 244 | spare_blocks; |
48a61477 | 245 | |
f5fc0f86 LC |
246 | if (total_blocks <= wl->tx_blocks_available) { |
247 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
248 | skb, total_len - skb->len); | |
249 | ||
ae77eccf SL |
250 | /* HW descriptor fields change between wl127x and wl128x */ |
251 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
252 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
253 | } else { | |
e7ddf549 | 254 | desc->wl127x_mem.extra_blocks = spare_blocks; |
ae77eccf SL |
255 | desc->wl127x_mem.total_mem_blocks = total_blocks; |
256 | } | |
257 | ||
f5fc0f86 LC |
258 | desc->id = id; |
259 | ||
260 | wl->tx_blocks_available -= total_blocks; | |
7bb5d6ce | 261 | wl->tx_allocated_blocks += total_blocks; |
f5fc0f86 | 262 | |
742246f8 AN |
263 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
264 | wl->tx_allocated_pkts[ac]++; | |
bf54e301 | 265 | |
536129c8 | 266 | if (wlvif->bss_type == BSS_TYPE_AP_BSS && |
c7ffb902 | 267 | test_bit(hlid, wlvif->ap.sta_hlid_map)) |
9b17f1b3 | 268 | wl->links[hlid].allocated_pkts++; |
09039f42 | 269 | |
f5fc0f86 LC |
270 | ret = 0; |
271 | ||
272 | wl1271_debug(DEBUG_TX, | |
273 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
274 | total_len, total_blocks, id); | |
781608c4 | 275 | } else { |
25eeb9e3 | 276 | wl1271_free_tx_id(wl, id); |
781608c4 | 277 | } |
f5fc0f86 LC |
278 | |
279 | return ret; | |
280 | } | |
281 | ||
536129c8 EP |
282 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct ieee80211_vif *vif, |
283 | struct sk_buff *skb, u32 extra, | |
284 | struct ieee80211_tx_info *control, u8 hlid) | |
f5fc0f86 | 285 | { |
536129c8 | 286 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); |
ac5e1e39 | 287 | struct timespec ts; |
f5fc0f86 | 288 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 289 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 290 | s64 hosttime; |
d0f63b20 | 291 | u16 tx_attr; |
f5fc0f86 LC |
292 | |
293 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
294 | ||
1e2b7976 JO |
295 | /* relocate space for security header */ |
296 | if (extra) { | |
297 | void *framestart = skb->data + sizeof(*desc); | |
298 | u16 fc = *(u16 *)(framestart + extra); | |
d0f63b20 | 299 | int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc)); |
1e2b7976 JO |
300 | memmove(framestart, framestart + extra, hdrlen); |
301 | } | |
302 | ||
f5fc0f86 | 303 | /* configure packet life time */ |
ac5e1e39 JO |
304 | getnstimeofday(&ts); |
305 | hosttime = (timespec_to_ns(&ts) >> 10); | |
306 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d | 307 | |
536129c8 | 308 | if (wlvif->bss_type != BSS_TYPE_AP_BSS) |
c6c8a65d AN |
309 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); |
310 | else | |
311 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 312 | |
db674d24 | 313 | /* queue */ |
c6999d83 | 314 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 315 | desc->tid = skb->priority; |
c6c8a65d | 316 | |
990f5de7 | 317 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
318 | /* |
319 | * FW expects the dummy packet to have an invalid session id - | |
320 | * any session id that is different than the one set in the join | |
321 | */ | |
98b86253 | 322 | tx_attr = (SESSION_COUNTER_INVALID << |
ae47c45f SL |
323 | TX_HW_ATTR_OFST_SESSION_COUNTER) & |
324 | TX_HW_ATTR_SESSION_COUNTER; | |
325 | ||
326 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
ae47c45f SL |
327 | } else { |
328 | /* configure the tx attributes */ | |
98b86253 EP |
329 | tx_attr = wlvif->session_counter << |
330 | TX_HW_ATTR_OFST_SESSION_COUNTER; | |
ae47c45f SL |
331 | } |
332 | ||
79b122dc | 333 | desc->hlid = hlid; |
536129c8 | 334 | if (wlvif->bss_type != BSS_TYPE_AP_BSS) { |
c6c8a65d AN |
335 | /* if the packets are destined for AP (have a STA entry) |
336 | send them with AP rate policies, otherwise use default | |
337 | basic rates */ | |
338 | if (control->control.sta) | |
339 | rate_idx = ACX_TX_AP_FULL_RATE; | |
340 | else | |
341 | rate_idx = ACX_TX_BASIC_RATE; | |
342 | } else { | |
a8ab39a4 | 343 | if (hlid == wlvif->ap.global_hlid) |
09039f42 | 344 | rate_idx = ACX_TX_AP_MODE_MGMT_RATE; |
a8ab39a4 | 345 | else if (hlid == wlvif->ap.bcast_hlid) |
09039f42 | 346 | rate_idx = ACX_TX_AP_MODE_BCST_RATE; |
e51ae9be | 347 | else |
c6c8a65d | 348 | rate_idx = ac; |
c6c8a65d AN |
349 | } |
350 | ||
351 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
352 | desc->reserved = 0; |
353 | ||
0da13da7 | 354 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 355 | |
0da13da7 | 356 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
357 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
358 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
359 | |
360 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
361 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
362 | desc->hlid, tx_attr, | |
363 | le16_to_cpu(desc->length), | |
364 | le16_to_cpu(desc->life_time), | |
365 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
366 | } else { |
367 | int pad; | |
368 | ||
0da13da7 | 369 | /* Store the aligned length in terms of words */ |
48a61477 SL |
370 | desc->length = cpu_to_le16(aligned_len >> 2); |
371 | ||
372 | /* calculate number of padding bytes */ | |
373 | pad = aligned_len - skb->len; | |
374 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 375 | |
ae77eccf SL |
376 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
377 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
378 | desc->hlid, tx_attr, | |
379 | le16_to_cpu(desc->length), | |
380 | le16_to_cpu(desc->life_time), | |
381 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 382 | } |
d0f63b20 LC |
383 | |
384 | desc->tx_attr = cpu_to_le16(tx_attr); | |
f5fc0f86 LC |
385 | } |
386 | ||
387 | /* caller must hold wl->mutex */ | |
a19606b4 IY |
388 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb, |
389 | u32 buf_offset) | |
f5fc0f86 LC |
390 | { |
391 | struct ieee80211_tx_info *info; | |
536129c8 EP |
392 | struct ieee80211_vif *vif; |
393 | struct wl12xx_vif *wlvif; | |
f5fc0f86 LC |
394 | u32 extra = 0; |
395 | int ret = 0; | |
a19606b4 | 396 | u32 total_len; |
09039f42 | 397 | u8 hlid; |
536129c8 | 398 | bool is_dummy; |
f5fc0f86 LC |
399 | |
400 | if (!skb) | |
401 | return -EINVAL; | |
402 | ||
403 | info = IEEE80211_SKB_CB(skb); | |
404 | ||
536129c8 EP |
405 | /* TODO: handle dummy packets on multi-vifs */ |
406 | is_dummy = wl12xx_is_dummy_packet(wl, skb); | |
407 | if (is_dummy) | |
408 | info->control.vif = wl->vif; | |
409 | ||
410 | vif = info->control.vif; | |
411 | wlvif = wl12xx_vif_to_data(vif); | |
412 | ||
f5fc0f86 | 413 | if (info->control.hw_key && |
97359d12 | 414 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
415 | extra = WL1271_TKIP_IV_SPACE; |
416 | ||
417 | if (info->control.hw_key) { | |
7f179b46 AN |
418 | bool is_wep; |
419 | u8 idx = info->control.hw_key->hw_key_idx; | |
420 | u32 cipher = info->control.hw_key->cipher; | |
421 | ||
422 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
423 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 424 | |
f75c753f | 425 | if (unlikely(is_wep && wlvif->default_key != idx)) { |
536129c8 | 426 | ret = wl1271_set_default_wep_key(wl, wlvif, idx); |
f5fc0f86 LC |
427 | if (ret < 0) |
428 | return ret; | |
f75c753f | 429 | wlvif->default_key = idx; |
f5fc0f86 LC |
430 | } |
431 | } | |
536129c8 | 432 | hlid = wl1271_tx_get_hlid(wl, vif, skb); |
79b122dc EP |
433 | if (hlid == WL12XX_INVALID_LINK_ID) { |
434 | wl1271_error("invalid hlid. dropping skb 0x%p", skb); | |
435 | return -EINVAL; | |
436 | } | |
09039f42 | 437 | |
536129c8 | 438 | ret = wl1271_tx_allocate(wl, vif, skb, extra, buf_offset, hlid); |
f5fc0f86 LC |
439 | if (ret < 0) |
440 | return ret; | |
441 | ||
536129c8 | 442 | wl1271_tx_fill_hdr(wl, vif, skb, extra, info, hlid); |
fae2fd76 | 443 | |
536129c8 | 444 | if (wlvif->bss_type == BSS_TYPE_AP_BSS && !is_dummy) { |
99a2775d | 445 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
c7ffb902 | 446 | wl1271_tx_regulate_link(wl, wlvif, hlid); |
b622d992 | 447 | } |
99a2775d | 448 | |
a19606b4 | 449 | /* |
48a61477 SL |
450 | * The length of each packet is stored in terms of |
451 | * words. Thus, we must pad the skb data to make sure its | |
452 | * length is aligned. The number of padding bytes is computed | |
453 | * and set in wl1271_tx_fill_hdr. | |
454 | * In special cases, we want to align to a specific block size | |
455 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 456 | */ |
0da13da7 | 457 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 458 | |
a19606b4 IY |
459 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
460 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 461 | |
990f5de7 | 462 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
536129c8 | 463 | if (is_dummy) |
990f5de7 IY |
464 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); |
465 | ||
a19606b4 | 466 | return total_len; |
f5fc0f86 LC |
467 | } |
468 | ||
af7fbb28 EP |
469 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, |
470 | enum ieee80211_band rate_band) | |
830fb67b JO |
471 | { |
472 | struct ieee80211_supported_band *band; | |
473 | u32 enabled_rates = 0; | |
474 | int bit; | |
475 | ||
af7fbb28 | 476 | band = wl->hw->wiphy->bands[rate_band]; |
830fb67b JO |
477 | for (bit = 0; bit < band->n_bitrates; bit++) { |
478 | if (rate_set & 0x1) | |
479 | enabled_rates |= band->bitrates[bit].hw_value; | |
480 | rate_set >>= 1; | |
481 | } | |
482 | ||
18357850 SL |
483 | /* MCS rates indication are on bits 16 - 23 */ |
484 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
485 | ||
486 | for (bit = 0; bit < 8; bit++) { | |
487 | if (rate_set & 0x1) | |
488 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
489 | rate_set >>= 1; | |
490 | } | |
18357850 | 491 | |
830fb67b JO |
492 | return enabled_rates; |
493 | } | |
494 | ||
a8c0ddb5 | 495 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
496 | { |
497 | unsigned long flags; | |
708bb3cf | 498 | int i; |
2fe33e8c | 499 | |
708bb3cf AN |
500 | for (i = 0; i < NUM_TX_QUEUES; i++) { |
501 | if (test_bit(i, &wl->stopped_queues_map) && | |
f1a46384 | 502 | wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
708bb3cf AN |
503 | /* firmware buffer has space, restart queues */ |
504 | spin_lock_irqsave(&wl->wl_lock, flags); | |
505 | ieee80211_wake_queue(wl->hw, | |
506 | wl1271_tx_get_mac80211_queue(i)); | |
507 | clear_bit(i, &wl->stopped_queues_map); | |
508 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
509 | } | |
2fe33e8c IY |
510 | } |
511 | } | |
512 | ||
742246f8 AN |
513 | static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl, |
514 | struct sk_buff_head *queues) | |
515 | { | |
516 | int i, q = -1, ac; | |
517 | u32 min_pkts = 0xffffffff; | |
518 | ||
519 | /* | |
520 | * Find a non-empty ac where: | |
521 | * 1. There are packets to transmit | |
522 | * 2. The FW has the least allocated blocks | |
523 | * | |
524 | * We prioritize the ACs according to VO>VI>BE>BK | |
525 | */ | |
526 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
527 | ac = wl1271_tx_get_queue(i); | |
528 | if (!skb_queue_empty(&queues[ac]) && | |
529 | (wl->tx_allocated_pkts[ac] < min_pkts)) { | |
530 | q = ac; | |
531 | min_pkts = wl->tx_allocated_pkts[q]; | |
532 | } | |
533 | } | |
534 | ||
535 | if (q == -1) | |
536 | return NULL; | |
537 | ||
538 | return &queues[q]; | |
539 | } | |
540 | ||
a8c0ddb5 | 541 | static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl) |
6742f554 JO |
542 | { |
543 | struct sk_buff *skb = NULL; | |
544 | unsigned long flags; | |
742246f8 | 545 | struct sk_buff_head *queue; |
6742f554 | 546 | |
742246f8 AN |
547 | queue = wl1271_select_queue(wl, wl->tx_queue); |
548 | if (!queue) | |
7bb5d6ce | 549 | goto out; |
742246f8 AN |
550 | |
551 | skb = skb_dequeue(queue); | |
6742f554 JO |
552 | |
553 | out: | |
554 | if (skb) { | |
f1a46384 | 555 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
6742f554 | 556 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 557 | wl->tx_queue_count[q]--; |
6742f554 JO |
558 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
559 | } | |
560 | ||
561 | return skb; | |
562 | } | |
563 | ||
c7ffb902 EP |
564 | static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl, |
565 | struct wl12xx_vif *wlvif) | |
a8c0ddb5 AN |
566 | { |
567 | struct sk_buff *skb = NULL; | |
568 | unsigned long flags; | |
569 | int i, h, start_hlid; | |
742246f8 | 570 | struct sk_buff_head *queue; |
a8c0ddb5 AN |
571 | |
572 | /* start from the link after the last one */ | |
4438aca9 | 573 | start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
574 | |
575 | /* dequeue according to AC, round robin on each link */ | |
c7ffb902 EP |
576 | for (i = 0; i < WL12XX_MAX_LINKS; i++) { |
577 | h = (start_hlid + i) % WL12XX_MAX_LINKS; | |
a8c0ddb5 | 578 | |
742246f8 | 579 | /* only consider connected stations */ |
c7ffb902 | 580 | if (!test_bit(h, wlvif->links_map)) |
742246f8 AN |
581 | continue; |
582 | ||
583 | queue = wl1271_select_queue(wl, wl->links[h].tx_queue); | |
584 | if (!queue) | |
585 | continue; | |
586 | ||
587 | skb = skb_dequeue(queue); | |
7bb5d6ce | 588 | if (skb) |
742246f8 | 589 | break; |
a8c0ddb5 AN |
590 | } |
591 | ||
a8c0ddb5 | 592 | if (skb) { |
f1a46384 | 593 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
4438aca9 | 594 | wlvif->last_tx_hlid = h; |
a8c0ddb5 | 595 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 596 | wl->tx_queue_count[q]--; |
a8c0ddb5 AN |
597 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
598 | } else { | |
4438aca9 | 599 | wlvif->last_tx_hlid = 0; |
a8c0ddb5 AN |
600 | } |
601 | ||
602 | return skb; | |
603 | } | |
604 | ||
536129c8 EP |
605 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, |
606 | struct wl12xx_vif *wlvif) | |
a8c0ddb5 | 607 | { |
990f5de7 IY |
608 | unsigned long flags; |
609 | struct sk_buff *skb = NULL; | |
610 | ||
536129c8 | 611 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) |
c7ffb902 | 612 | skb = wl1271_ap_skb_dequeue(wl, wlvif); |
990f5de7 IY |
613 | else |
614 | skb = wl1271_sta_skb_dequeue(wl); | |
a8c0ddb5 | 615 | |
990f5de7 IY |
616 | if (!skb && |
617 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
f1a46384 AN |
618 | int q; |
619 | ||
990f5de7 | 620 | skb = wl->dummy_packet; |
f1a46384 | 621 | q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
990f5de7 | 622 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 623 | wl->tx_queue_count[q]--; |
990f5de7 IY |
624 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
625 | } | |
626 | ||
627 | return skb; | |
a8c0ddb5 AN |
628 | } |
629 | ||
536129c8 EP |
630 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct ieee80211_vif *vif, |
631 | struct sk_buff *skb) | |
6742f554 | 632 | { |
536129c8 | 633 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); |
6742f554 JO |
634 | unsigned long flags; |
635 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
636 | ||
990f5de7 IY |
637 | if (wl12xx_is_dummy_packet(wl, skb)) { |
638 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
536129c8 EP |
639 | } else if (wlvif->bss_type == BSS_TYPE_AP_BSS) { |
640 | u8 hlid = wl1271_tx_get_hlid(wl, vif, skb); | |
a8c0ddb5 AN |
641 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); |
642 | ||
643 | /* make sure we dequeue the same packet next time */ | |
4438aca9 | 644 | wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) % |
c7ffb902 | 645 | WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
646 | } else { |
647 | skb_queue_head(&wl->tx_queue[q], skb); | |
648 | } | |
649 | ||
6742f554 | 650 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 651 | wl->tx_queue_count[q]++; |
6742f554 JO |
652 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
653 | } | |
654 | ||
77ddaa10 EP |
655 | static bool wl1271_tx_is_data_present(struct sk_buff *skb) |
656 | { | |
657 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); | |
658 | ||
659 | return ieee80211_is_data_present(hdr->frame_control); | |
660 | } | |
661 | ||
536129c8 | 662 | void wl1271_tx_work_locked(struct wl1271 *wl, struct ieee80211_vif *vif) |
f5fc0f86 | 663 | { |
536129c8 | 664 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); |
f5fc0f86 | 665 | struct sk_buff *skb; |
6c6e669e IY |
666 | u32 buf_offset = 0; |
667 | bool sent_packets = false; | |
77ddaa10 | 668 | bool had_data = false; |
536129c8 | 669 | bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS); |
f5fc0f86 LC |
670 | int ret; |
671 | ||
f5fc0f86 | 672 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 673 | return; |
f5fc0f86 | 674 | |
536129c8 | 675 | while ((skb = wl1271_skb_dequeue(wl, wlvif))) { |
77ddaa10 EP |
676 | if (wl1271_tx_is_data_present(skb)) |
677 | had_data = true; | |
678 | ||
a19606b4 | 679 | ret = wl1271_prepare_tx_frame(wl, skb, buf_offset); |
6c6e669e | 680 | if (ret == -EAGAIN) { |
a19606b4 | 681 | /* |
6c6e669e IY |
682 | * Aggregation buffer is full. |
683 | * Flush buffer and try again. | |
684 | */ | |
536129c8 | 685 | wl1271_skb_queue_head(wl, vif, skb); |
6c6e669e | 686 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 687 | buf_offset, true); |
6c6e669e IY |
688 | sent_packets = true; |
689 | buf_offset = 0; | |
690 | continue; | |
691 | } else if (ret == -EBUSY) { | |
692 | /* | |
693 | * Firmware buffer is full. | |
a19606b4 IY |
694 | * Queue back last skb, and stop aggregating. |
695 | */ | |
536129c8 | 696 | wl1271_skb_queue_head(wl, vif, skb); |
a522550a IY |
697 | /* No work left, avoid scheduling redundant tx work */ |
698 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 699 | goto out_ack; |
f5fc0f86 LC |
700 | } else if (ret < 0) { |
701 | dev_kfree_skb(skb); | |
ffb591cd | 702 | goto out_ack; |
f5fc0f86 | 703 | } |
a19606b4 IY |
704 | buf_offset += ret; |
705 | wl->tx_packets_count++; | |
f5fc0f86 LC |
706 | } |
707 | ||
ffb591cd | 708 | out_ack: |
a19606b4 IY |
709 | if (buf_offset) { |
710 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
711 | buf_offset, true); | |
6c6e669e IY |
712 | sent_packets = true; |
713 | } | |
714 | if (sent_packets) { | |
606ea9fa IY |
715 | /* |
716 | * Interrupt the firmware with the new packets. This is only | |
717 | * required for older hardware revisions | |
718 | */ | |
719 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
720 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
721 | wl->tx_packets_count); | |
722 | ||
a8c0ddb5 | 723 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 724 | } |
77ddaa10 EP |
725 | if (!is_ap && wl->conf.rx_streaming.interval && had_data && |
726 | (wl->conf.rx_streaming.always || | |
727 | test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))) { | |
728 | u32 timeout = wl->conf.rx_streaming.duration; | |
729 | ||
730 | /* enable rx streaming */ | |
731 | if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED, &wl->flags)) | |
732 | ieee80211_queue_work(wl->hw, | |
733 | &wl->rx_streaming_enable_work); | |
734 | ||
735 | mod_timer(&wl->rx_streaming_timer, | |
736 | jiffies + msecs_to_jiffies(timeout)); | |
737 | } | |
a522550a | 738 | } |
f5fc0f86 | 739 | |
a522550a IY |
740 | void wl1271_tx_work(struct work_struct *work) |
741 | { | |
742 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 743 | int ret; |
a522550a IY |
744 | |
745 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
746 | ret = wl1271_ps_elp_wakeup(wl); |
747 | if (ret < 0) | |
748 | goto out; | |
749 | ||
536129c8 | 750 | wl1271_tx_work_locked(wl, wl->vif); |
c1b193eb | 751 | |
c75bbcdb | 752 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 753 | out: |
f5fc0f86 LC |
754 | mutex_unlock(&wl->mutex); |
755 | } | |
756 | ||
757 | static void wl1271_tx_complete_packet(struct wl1271 *wl, | |
758 | struct wl1271_tx_hw_res_descr *result) | |
759 | { | |
f5fc0f86 LC |
760 | struct ieee80211_tx_info *info; |
761 | struct sk_buff *skb; | |
f5fc0f86 | 762 | int id = result->id; |
31627dc5 JO |
763 | int rate = -1; |
764 | u8 retries = 0; | |
f5fc0f86 LC |
765 | |
766 | /* check for id legality */ | |
ffb591cd | 767 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
768 | wl1271_warning("TX result illegal id: %d", id); |
769 | return; | |
770 | } | |
771 | ||
772 | skb = wl->tx_frames[id]; | |
773 | info = IEEE80211_SKB_CB(skb); | |
774 | ||
990f5de7 | 775 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
776 | wl1271_free_tx_id(wl, id); |
777 | return; | |
778 | } | |
779 | ||
31627dc5 JO |
780 | /* update the TX status info */ |
781 | if (result->status == TX_SUCCESS) { | |
782 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 783 | info->flags |= IEEE80211_TX_STAT_ACK; |
6a2de93b | 784 | rate = wl1271_rate_to_idx(result->rate_class_index, wl->band); |
31627dc5 JO |
785 | retries = result->ack_failures; |
786 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
787 | wl->stats.excessive_retries++; | |
788 | retries = result->ack_failures; | |
f5fc0f86 LC |
789 | } |
790 | ||
31627dc5 JO |
791 | info->status.rates[0].idx = rate; |
792 | info->status.rates[0].count = retries; | |
793 | info->status.rates[0].flags = 0; | |
794 | info->status.ack_signal = -1; | |
795 | ||
f5fc0f86 LC |
796 | wl->stats.retry_count += result->ack_failures; |
797 | ||
b992c682 OK |
798 | /* |
799 | * update sequence number only when relevant, i.e. only in | |
800 | * sessions of TKIP, AES and GEM (not in open or WEP sessions) | |
801 | */ | |
802 | if (info->control.hw_key && | |
803 | (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || | |
804 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || | |
805 | info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { | |
806 | u8 fw_lsb = result->tx_security_sequence_number_lsb; | |
807 | u8 cur_lsb = wl->tx_security_last_seq_lsb; | |
808 | ||
809 | /* | |
810 | * update security sequence number, taking care of potential | |
811 | * wrap-around | |
812 | */ | |
813 | wl->tx_security_seq += (fw_lsb - cur_lsb + 256) % 256; | |
814 | wl->tx_security_last_seq_lsb = fw_lsb; | |
815 | } | |
ac4e4ce5 | 816 | |
1e2b7976 JO |
817 | /* remove private header from packet */ |
818 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
819 | ||
820 | /* remove TKIP header space if present */ | |
f5fc0f86 | 821 | if (info->control.hw_key && |
97359d12 | 822 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
823 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
824 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
825 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
826 | } | |
f5fc0f86 LC |
827 | |
828 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
829 | " status 0x%x", | |
830 | result->id, skb, result->ack_failures, | |
831 | result->rate_class_index, result->status); | |
832 | ||
f5fc0f86 | 833 | /* return the packet to the stack */ |
a620865e | 834 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
92ef8960 | 835 | queue_work(wl->freezable_wq, &wl->netstack_work); |
25eeb9e3 | 836 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
837 | } |
838 | ||
839 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 840 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
841 | { |
842 | struct wl1271_acx_mem_map *memmap = | |
843 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 844 | u32 count, fw_counter; |
f5fc0f86 LC |
845 | u32 i; |
846 | ||
f5fc0f86 | 847 | /* read the tx results from the chipset */ |
7b048c52 TP |
848 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
849 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
850 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
851 | ||
852 | /* write host counter to chipset (to ack) */ | |
853 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
854 | offsetof(struct wl1271_tx_hw_res_if, | |
855 | tx_result_host_counter), fw_counter); | |
856 | ||
857 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 858 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
859 | |
860 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 861 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 862 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
863 | |
864 | /* process the results */ | |
865 | for (i = 0; i < count; i++) { | |
866 | struct wl1271_tx_hw_res_descr *result; | |
867 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
868 | ||
869 | /* process the packet */ | |
870 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
871 | wl1271_tx_complete_packet(wl, result); | |
872 | ||
873 | wl->tx_results_count++; | |
874 | } | |
f5fc0f86 LC |
875 | } |
876 | ||
a8c0ddb5 AN |
877 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
878 | { | |
879 | struct sk_buff *skb; | |
f1a46384 | 880 | int i; |
a8c0ddb5 | 881 | unsigned long flags; |
1d36cd89 | 882 | struct ieee80211_tx_info *info; |
f1a46384 | 883 | int total[NUM_TX_QUEUES]; |
a8c0ddb5 AN |
884 | |
885 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
f1a46384 | 886 | total[i] = 0; |
a8c0ddb5 AN |
887 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { |
888 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
79ebec76 AN |
889 | |
890 | if (!wl12xx_is_dummy_packet(wl, skb)) { | |
891 | info = IEEE80211_SKB_CB(skb); | |
892 | info->status.rates[0].idx = -1; | |
893 | info->status.rates[0].count = 0; | |
894 | ieee80211_tx_status_ni(wl->hw, skb); | |
895 | } | |
896 | ||
f1a46384 | 897 | total[i]++; |
a8c0ddb5 AN |
898 | } |
899 | } | |
900 | ||
901 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 AN |
902 | for (i = 0; i < NUM_TX_QUEUES; i++) |
903 | wl->tx_queue_count[i] -= total[i]; | |
a8c0ddb5 AN |
904 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
905 | ||
906 | wl1271_handle_tx_low_watermark(wl); | |
907 | } | |
908 | ||
7dece1c8 AN |
909 | /* caller must hold wl->mutex and TX must be stopped */ |
910 | void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues) | |
f5fc0f86 | 911 | { |
536129c8 EP |
912 | struct ieee80211_vif *vif = wl->vif; /* TODO: get as param */ |
913 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); | |
f5fc0f86 LC |
914 | int i; |
915 | struct sk_buff *skb; | |
1d36cd89 | 916 | struct ieee80211_tx_info *info; |
f5fc0f86 LC |
917 | |
918 | /* TX failure */ | |
536129c8 | 919 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) { |
c7ffb902 EP |
920 | for (i = 0; i < WL12XX_MAX_LINKS; i++) { |
921 | wl1271_free_sta(wl, wlvif, i); | |
a8c0ddb5 | 922 | wl1271_tx_reset_link_queues(wl, i); |
9b17f1b3 AN |
923 | wl->links[i].allocated_pkts = 0; |
924 | wl->links[i].prev_freed_pkts = 0; | |
09039f42 | 925 | } |
a8c0ddb5 | 926 | |
4438aca9 | 927 | wlvif->last_tx_hlid = 0; |
a8c0ddb5 AN |
928 | } else { |
929 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
930 | while ((skb = skb_dequeue(&wl->tx_queue[i]))) { | |
931 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", | |
932 | skb); | |
ae47c45f | 933 | |
990f5de7 | 934 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
935 | info = IEEE80211_SKB_CB(skb); |
936 | info->status.rates[0].idx = -1; | |
937 | info->status.rates[0].count = 0; | |
c27d3acc | 938 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 939 | } |
a8c0ddb5 | 940 | } |
6742f554 | 941 | } |
f1acea9a | 942 | |
d0802abd | 943 | wlvif->sta.ba_rx_bitmap = 0; |
f5fc0f86 | 944 | } |
a8c0ddb5 | 945 | |
f1acea9a AN |
946 | for (i = 0; i < NUM_TX_QUEUES; i++) |
947 | wl->tx_queue_count[i] = 0; | |
948 | ||
708bb3cf | 949 | wl->stopped_queues_map = 0; |
f5fc0f86 | 950 | |
2fe33e8c IY |
951 | /* |
952 | * Make sure the driver is at a consistent state, in case this | |
953 | * function is called from a context other than interface removal. | |
7dece1c8 | 954 | * This call will always wake the TX queues. |
2fe33e8c | 955 | */ |
7dece1c8 AN |
956 | if (reset_tx_queues) |
957 | wl1271_handle_tx_low_watermark(wl); | |
2fe33e8c | 958 | |
50e9f746 IY |
959 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
960 | if (wl->tx_frames[i] == NULL) | |
961 | continue; | |
962 | ||
963 | skb = wl->tx_frames[i]; | |
964 | wl1271_free_tx_id(wl, i); | |
965 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
966 | ||
990f5de7 | 967 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
968 | /* |
969 | * Remove private headers before passing the skb to | |
970 | * mac80211 | |
971 | */ | |
972 | info = IEEE80211_SKB_CB(skb); | |
973 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
974 | if (info->control.hw_key && | |
975 | info->control.hw_key->cipher == | |
976 | WLAN_CIPHER_SUITE_TKIP) { | |
977 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
978 | memmove(skb->data + WL1271_TKIP_IV_SPACE, | |
979 | skb->data, hdrlen); | |
980 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
981 | } | |
50e9f746 | 982 | |
ae47c45f SL |
983 | info->status.rates[0].idx = -1; |
984 | info->status.rates[0].count = 0; | |
50e9f746 | 985 | |
c27d3acc | 986 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 987 | } |
50e9f746 | 988 | } |
781608c4 JO |
989 | } |
990 | ||
991 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
992 | ||
993 | /* caller must *NOT* hold wl->mutex */ | |
994 | void wl1271_tx_flush(struct wl1271 *wl) | |
995 | { | |
996 | unsigned long timeout; | |
997 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
998 | ||
999 | while (!time_after(jiffies, timeout)) { | |
1000 | mutex_lock(&wl->mutex); | |
a8c0ddb5 | 1001 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
f1a46384 AN |
1002 | wl->tx_frames_cnt, |
1003 | wl1271_tx_total_queue_count(wl)); | |
1004 | if ((wl->tx_frames_cnt == 0) && | |
1005 | (wl1271_tx_total_queue_count(wl) == 0)) { | |
781608c4 JO |
1006 | mutex_unlock(&wl->mutex); |
1007 | return; | |
1008 | } | |
1009 | mutex_unlock(&wl->mutex); | |
1010 | msleep(1); | |
1011 | } | |
1012 | ||
1013 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 1014 | } |
e0fe371b | 1015 | |
af7fbb28 | 1016 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) |
e0fe371b | 1017 | { |
af7fbb28 EP |
1018 | if (WARN_ON(!rate_set)) |
1019 | return 0; | |
e0fe371b | 1020 | |
af7fbb28 | 1021 | return BIT(__ffs(rate_set)); |
e0fe371b | 1022 | } |