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 | 28 | #include "wl12xx.h" |
0f4e3122 | 29 | #include "debug.h" |
00d20100 SL |
30 | #include "io.h" |
31 | #include "reg.h" | |
32 | #include "ps.h" | |
33 | #include "tx.h" | |
56d4f8f6 | 34 | #include "event.h" |
f5fc0f86 | 35 | |
536129c8 EP |
36 | static int wl1271_set_default_wep_key(struct wl1271 *wl, |
37 | struct wl12xx_vif *wlvif, u8 id) | |
7f179b46 AN |
38 | { |
39 | int ret; | |
536129c8 | 40 | bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS); |
7f179b46 AN |
41 | |
42 | if (is_ap) | |
c690ec81 | 43 | ret = wl12xx_cmd_set_default_wep_key(wl, id, |
a8ab39a4 | 44 | wlvif->ap.bcast_hlid); |
7f179b46 | 45 | else |
154da67c | 46 | ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid); |
7f179b46 AN |
47 | |
48 | if (ret < 0) | |
49 | return ret; | |
50 | ||
51 | wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); | |
52 | return 0; | |
53 | } | |
54 | ||
25eeb9e3 | 55 | static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) |
f5fc0f86 | 56 | { |
25eeb9e3 IY |
57 | int id; |
58 | ||
59 | id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS); | |
60 | if (id >= ACX_TX_DESCRIPTORS) | |
61 | return -EBUSY; | |
62 | ||
63 | __set_bit(id, wl->tx_frames_map); | |
64 | wl->tx_frames[id] = skb; | |
65 | wl->tx_frames_cnt++; | |
66 | return id; | |
67 | } | |
f5fc0f86 | 68 | |
25eeb9e3 IY |
69 | static void wl1271_free_tx_id(struct wl1271 *wl, int id) |
70 | { | |
71 | if (__test_and_clear_bit(id, wl->tx_frames_map)) { | |
ef2e3004 IY |
72 | if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS)) |
73 | clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
74 | ||
25eeb9e3 IY |
75 | wl->tx_frames[id] = NULL; |
76 | wl->tx_frames_cnt--; | |
77 | } | |
f5fc0f86 LC |
78 | } |
79 | ||
c5745187 | 80 | static int wl1271_tx_update_filters(struct wl1271 *wl, |
7edebf56 EP |
81 | struct wl12xx_vif *wlvif, |
82 | struct sk_buff *skb) | |
c5745187 OBC |
83 | { |
84 | struct ieee80211_hdr *hdr; | |
251c177f | 85 | int ret; |
c5745187 | 86 | |
df4c849f | 87 | hdr = (struct ieee80211_hdr *)skb->data; |
c5745187 OBC |
88 | |
89 | /* | |
90 | * stop bssid-based filtering before transmitting authentication | |
91 | * requests. this way the hw will never drop authentication | |
92 | * responses coming from BSSIDs it isn't familiar with (e.g. on | |
93 | * roaming) | |
94 | */ | |
95 | if (!ieee80211_is_auth(hdr->frame_control)) | |
96 | return 0; | |
97 | ||
afaf8bdb | 98 | if (wlvif->dev_hlid != WL12XX_INVALID_LINK_ID) |
251c177f EP |
99 | goto out; |
100 | ||
101 | wl1271_debug(DEBUG_CMD, "starting device role for roaming"); | |
679a6734 | 102 | ret = wl12xx_start_dev(wl, wlvif); |
251c177f EP |
103 | if (ret < 0) |
104 | goto out; | |
105 | out: | |
08c1d1c7 | 106 | return 0; |
c5745187 OBC |
107 | } |
108 | ||
99a2775d AN |
109 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
110 | struct sk_buff *skb) | |
111 | { | |
112 | struct ieee80211_hdr *hdr; | |
113 | ||
114 | /* | |
115 | * add the station to the known list before transmitting the | |
116 | * authentication response. this way it won't get de-authed by FW | |
117 | * when transmitting too soon. | |
118 | */ | |
119 | hdr = (struct ieee80211_hdr *)(skb->data + | |
120 | sizeof(struct wl1271_tx_hw_descr)); | |
121 | if (ieee80211_is_auth(hdr->frame_control)) | |
122 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
123 | } | |
124 | ||
c7ffb902 EP |
125 | static void wl1271_tx_regulate_link(struct wl1271 *wl, |
126 | struct wl12xx_vif *wlvif, | |
127 | u8 hlid) | |
b622d992 | 128 | { |
da03209e | 129 | bool fw_ps, single_sta; |
9b17f1b3 | 130 | u8 tx_pkts; |
b622d992 | 131 | |
c7ffb902 | 132 | if (WARN_ON(!test_bit(hlid, wlvif->links_map))) |
b622d992 AN |
133 | return; |
134 | ||
135 | fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map); | |
9b17f1b3 | 136 | tx_pkts = wl->links[hlid].allocated_pkts; |
da03209e | 137 | single_sta = (wl->active_sta_count == 1); |
b622d992 AN |
138 | |
139 | /* | |
140 | * if in FW PS and there is enough data in FW we can put the link | |
141 | * into high-level PS and clean out its TX queues. | |
da03209e AN |
142 | * Make an exception if this is the only connected station. In this |
143 | * case FW-memory congestion is not a problem. | |
b622d992 | 144 | */ |
da03209e | 145 | if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS) |
6e8cd331 | 146 | wl12xx_ps_link_start(wl, wlvif, hlid, true); |
b622d992 AN |
147 | } |
148 | ||
f8e0af6b | 149 | bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) |
f4df1bd5 EP |
150 | { |
151 | return wl->dummy_packet == skb; | |
152 | } | |
153 | ||
a8ab39a4 EP |
154 | u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
155 | struct sk_buff *skb) | |
a8c0ddb5 AN |
156 | { |
157 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
158 | ||
159 | if (control->control.sta) { | |
160 | struct wl1271_station *wl_sta; | |
161 | ||
162 | wl_sta = (struct wl1271_station *) | |
163 | control->control.sta->drv_priv; | |
164 | return wl_sta->hlid; | |
165 | } else { | |
166 | struct ieee80211_hdr *hdr; | |
167 | ||
53d40d0b | 168 | if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags)) |
f4df1bd5 EP |
169 | return wl->system_hlid; |
170 | ||
a8c0ddb5 AN |
171 | hdr = (struct ieee80211_hdr *)skb->data; |
172 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
a8ab39a4 | 173 | return wlvif->ap.global_hlid; |
a8c0ddb5 | 174 | else |
a8ab39a4 | 175 | return wlvif->ap.bcast_hlid; |
a8c0ddb5 AN |
176 | } |
177 | } | |
178 | ||
d6a3cc2e EP |
179 | u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
180 | struct sk_buff *skb) | |
f4df1bd5 | 181 | { |
df4c849f EP |
182 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
183 | ||
0f168014 | 184 | if (!wlvif || wl12xx_is_dummy_packet(wl, skb)) |
f4df1bd5 EP |
185 | return wl->system_hlid; |
186 | ||
536129c8 | 187 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) |
a8ab39a4 | 188 | return wl12xx_tx_get_hlid_ap(wl, wlvif, skb); |
f4df1bd5 | 189 | |
7edebf56 | 190 | wl1271_tx_update_filters(wl, wlvif, skb); |
df4c849f | 191 | |
ba8447f6 | 192 | if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) || |
eee514e3 | 193 | test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) && |
df4c849f EP |
194 | !ieee80211_is_auth(hdr->frame_control) && |
195 | !ieee80211_is_assoc_req(hdr->frame_control)) | |
154da67c | 196 | return wlvif->sta.hlid; |
f4df1bd5 | 197 | else |
afaf8bdb | 198 | return wlvif->dev_hlid; |
f4df1bd5 EP |
199 | } |
200 | ||
0da13da7 IY |
201 | static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl, |
202 | unsigned int packet_length) | |
203 | { | |
ce39defb | 204 | if (wl->quirks & WL12XX_QUIRK_NO_BLOCKSIZE_ALIGNMENT) |
0da13da7 | 205 | return ALIGN(packet_length, WL1271_TX_ALIGN_TO); |
ce39defb LC |
206 | else |
207 | return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); | |
0da13da7 IY |
208 | } |
209 | ||
a32d0cdf | 210 | static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
211 | struct sk_buff *skb, u32 extra, u32 buf_offset, |
212 | u8 hlid) | |
f5fc0f86 LC |
213 | { |
214 | struct wl1271_tx_hw_descr *desc; | |
215 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 216 | u32 len; |
5c9417f1 | 217 | u32 total_blocks; |
742246f8 | 218 | int id, ret = -EBUSY, ac; |
e9eb8cbe | 219 | u32 spare_blocks = wl->tx_spare_blocks; |
a32d0cdf | 220 | bool is_dummy = false; |
f5fc0f86 | 221 | |
a19606b4 | 222 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 223 | return -EAGAIN; |
a19606b4 | 224 | |
f5fc0f86 | 225 | /* allocate free identifier for the packet */ |
25eeb9e3 | 226 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
227 | if (id < 0) |
228 | return id; | |
229 | ||
230 | /* approximate the number of blocks required for this packet | |
231 | in the firmware */ | |
0da13da7 | 232 | len = wl12xx_calc_packet_alignment(wl, total_len); |
48a61477 | 233 | |
e9eb8cbe | 234 | /* in case of a dummy packet, use default amount of spare mem blocks */ |
a32d0cdf EP |
235 | if (unlikely(wl12xx_is_dummy_packet(wl, skb))) { |
236 | is_dummy = true; | |
e9eb8cbe | 237 | spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT; |
a32d0cdf | 238 | } |
e9eb8cbe | 239 | |
48a61477 | 240 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + |
e7ddf549 | 241 | spare_blocks; |
48a61477 | 242 | |
f5fc0f86 LC |
243 | if (total_blocks <= wl->tx_blocks_available) { |
244 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
245 | skb, total_len - skb->len); | |
246 | ||
ae77eccf SL |
247 | /* HW descriptor fields change between wl127x and wl128x */ |
248 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
249 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
250 | } else { | |
e7ddf549 | 251 | desc->wl127x_mem.extra_blocks = spare_blocks; |
ae77eccf SL |
252 | desc->wl127x_mem.total_mem_blocks = total_blocks; |
253 | } | |
254 | ||
f5fc0f86 LC |
255 | desc->id = id; |
256 | ||
257 | wl->tx_blocks_available -= total_blocks; | |
7bb5d6ce | 258 | wl->tx_allocated_blocks += total_blocks; |
f5fc0f86 | 259 | |
742246f8 AN |
260 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
261 | wl->tx_allocated_pkts[ac]++; | |
bf54e301 | 262 | |
0f168014 EP |
263 | if (!is_dummy && wlvif && |
264 | wlvif->bss_type == BSS_TYPE_AP_BSS && | |
c7ffb902 | 265 | test_bit(hlid, wlvif->ap.sta_hlid_map)) |
9b17f1b3 | 266 | wl->links[hlid].allocated_pkts++; |
09039f42 | 267 | |
f5fc0f86 LC |
268 | ret = 0; |
269 | ||
270 | wl1271_debug(DEBUG_TX, | |
271 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
272 | total_len, total_blocks, id); | |
781608c4 | 273 | } else { |
25eeb9e3 | 274 | wl1271_free_tx_id(wl, id); |
781608c4 | 275 | } |
f5fc0f86 LC |
276 | |
277 | return ret; | |
278 | } | |
279 | ||
a32d0cdf | 280 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
281 | struct sk_buff *skb, u32 extra, |
282 | struct ieee80211_tx_info *control, u8 hlid) | |
f5fc0f86 | 283 | { |
ac5e1e39 | 284 | struct timespec ts; |
f5fc0f86 | 285 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 286 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 287 | s64 hosttime; |
d0f63b20 | 288 | u16 tx_attr; |
a32d0cdf | 289 | bool is_dummy; |
f5fc0f86 LC |
290 | |
291 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
292 | ||
1e2b7976 JO |
293 | /* relocate space for security header */ |
294 | if (extra) { | |
295 | void *framestart = skb->data + sizeof(*desc); | |
296 | u16 fc = *(u16 *)(framestart + extra); | |
d0f63b20 | 297 | int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc)); |
1e2b7976 JO |
298 | memmove(framestart, framestart + extra, hdrlen); |
299 | } | |
300 | ||
f5fc0f86 | 301 | /* configure packet life time */ |
ac5e1e39 JO |
302 | getnstimeofday(&ts); |
303 | hosttime = (timespec_to_ns(&ts) >> 10); | |
304 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d | 305 | |
a32d0cdf | 306 | is_dummy = wl12xx_is_dummy_packet(wl, skb); |
0f168014 | 307 | if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS) |
c6c8a65d AN |
308 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); |
309 | else | |
310 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 311 | |
db674d24 | 312 | /* queue */ |
c6999d83 | 313 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 314 | desc->tid = skb->priority; |
c6c8a65d | 315 | |
a32d0cdf | 316 | if (is_dummy) { |
ae47c45f SL |
317 | /* |
318 | * FW expects the dummy packet to have an invalid session id - | |
319 | * any session id that is different than the one set in the join | |
320 | */ | |
98b86253 | 321 | tx_attr = (SESSION_COUNTER_INVALID << |
ae47c45f SL |
322 | TX_HW_ATTR_OFST_SESSION_COUNTER) & |
323 | TX_HW_ATTR_SESSION_COUNTER; | |
324 | ||
325 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
0f168014 | 326 | } else if (wlvif) { |
ae47c45f | 327 | /* configure the tx attributes */ |
98b86253 EP |
328 | tx_attr = wlvif->session_counter << |
329 | TX_HW_ATTR_OFST_SESSION_COUNTER; | |
ae47c45f SL |
330 | } |
331 | ||
79b122dc | 332 | desc->hlid = hlid; |
0f168014 | 333 | if (is_dummy || !wlvif) |
a32d0cdf EP |
334 | rate_idx = 0; |
335 | else if (wlvif->bss_type != BSS_TYPE_AP_BSS) { | |
c6c8a65d AN |
336 | /* if the packets are destined for AP (have a STA entry) |
337 | send them with AP rate policies, otherwise use default | |
338 | basic rates */ | |
8a0f2ee3 EP |
339 | if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE) |
340 | rate_idx = wlvif->sta.p2p_rate_idx; | |
341 | else if (control->control.sta) | |
e5a359f8 | 342 | rate_idx = wlvif->sta.ap_rate_idx; |
c6c8a65d | 343 | else |
e5a359f8 | 344 | rate_idx = wlvif->sta.basic_rate_idx; |
c6c8a65d | 345 | } else { |
a8ab39a4 | 346 | if (hlid == wlvif->ap.global_hlid) |
e5a359f8 | 347 | rate_idx = wlvif->ap.mgmt_rate_idx; |
a8ab39a4 | 348 | else if (hlid == wlvif->ap.bcast_hlid) |
e5a359f8 | 349 | rate_idx = wlvif->ap.bcast_rate_idx; |
e51ae9be | 350 | else |
e5a359f8 | 351 | rate_idx = wlvif->ap.ucast_rate_idx[ac]; |
c6c8a65d AN |
352 | } |
353 | ||
354 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
355 | desc->reserved = 0; |
356 | ||
0da13da7 | 357 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 358 | |
0da13da7 | 359 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
360 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
361 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
362 | |
363 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
364 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
365 | desc->hlid, tx_attr, | |
366 | le16_to_cpu(desc->length), | |
367 | le16_to_cpu(desc->life_time), | |
368 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
369 | } else { |
370 | int pad; | |
371 | ||
0da13da7 | 372 | /* Store the aligned length in terms of words */ |
48a61477 SL |
373 | desc->length = cpu_to_le16(aligned_len >> 2); |
374 | ||
375 | /* calculate number of padding bytes */ | |
376 | pad = aligned_len - skb->len; | |
377 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 378 | |
ae77eccf SL |
379 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
380 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
381 | desc->hlid, tx_attr, | |
382 | le16_to_cpu(desc->length), | |
383 | le16_to_cpu(desc->life_time), | |
384 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 385 | } |
d0f63b20 LC |
386 | |
387 | desc->tx_attr = cpu_to_le16(tx_attr); | |
f5fc0f86 LC |
388 | } |
389 | ||
390 | /* caller must hold wl->mutex */ | |
a32d0cdf EP |
391 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
392 | struct sk_buff *skb, u32 buf_offset) | |
f5fc0f86 LC |
393 | { |
394 | struct ieee80211_tx_info *info; | |
395 | u32 extra = 0; | |
396 | int ret = 0; | |
a19606b4 | 397 | u32 total_len; |
09039f42 | 398 | u8 hlid; |
536129c8 | 399 | bool is_dummy; |
f5fc0f86 LC |
400 | |
401 | if (!skb) | |
402 | return -EINVAL; | |
403 | ||
404 | info = IEEE80211_SKB_CB(skb); | |
405 | ||
536129c8 EP |
406 | /* TODO: handle dummy packets on multi-vifs */ |
407 | is_dummy = wl12xx_is_dummy_packet(wl, skb); | |
536129c8 | 408 | |
f5fc0f86 | 409 | if (info->control.hw_key && |
97359d12 | 410 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
411 | extra = WL1271_TKIP_IV_SPACE; |
412 | ||
413 | if (info->control.hw_key) { | |
7f179b46 AN |
414 | bool is_wep; |
415 | u8 idx = info->control.hw_key->hw_key_idx; | |
416 | u32 cipher = info->control.hw_key->cipher; | |
417 | ||
418 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
419 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 420 | |
f75c753f | 421 | if (unlikely(is_wep && wlvif->default_key != idx)) { |
536129c8 | 422 | ret = wl1271_set_default_wep_key(wl, wlvif, idx); |
f5fc0f86 LC |
423 | if (ret < 0) |
424 | return ret; | |
f75c753f | 425 | wlvif->default_key = idx; |
f5fc0f86 LC |
426 | } |
427 | } | |
d6a3cc2e | 428 | hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); |
79b122dc | 429 | if (hlid == WL12XX_INVALID_LINK_ID) { |
48309fd4 SL |
430 | if (wlvif->bss_type == BSS_TYPE_IBSS && |
431 | !test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) { | |
432 | /* It's ok to drop packets when not joined to IBSS */ | |
433 | wl1271_debug(DEBUG_TX, "dropping skb while IBSS not " | |
434 | " joined"); | |
435 | } else { | |
436 | wl1271_error("invalid hlid. dropping skb 0x%p", skb); | |
437 | } | |
438 | ||
79b122dc EP |
439 | return -EINVAL; |
440 | } | |
09039f42 | 441 | |
a32d0cdf | 442 | ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid); |
f5fc0f86 LC |
443 | if (ret < 0) |
444 | return ret; | |
445 | ||
a32d0cdf | 446 | wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid); |
fae2fd76 | 447 | |
0f168014 | 448 | if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 449 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
c7ffb902 | 450 | wl1271_tx_regulate_link(wl, wlvif, hlid); |
b622d992 | 451 | } |
99a2775d | 452 | |
a19606b4 | 453 | /* |
48a61477 SL |
454 | * The length of each packet is stored in terms of |
455 | * words. Thus, we must pad the skb data to make sure its | |
456 | * length is aligned. The number of padding bytes is computed | |
457 | * and set in wl1271_tx_fill_hdr. | |
458 | * In special cases, we want to align to a specific block size | |
459 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 460 | */ |
0da13da7 | 461 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 462 | |
a19606b4 IY |
463 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
464 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 465 | |
990f5de7 | 466 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
536129c8 | 467 | if (is_dummy) |
990f5de7 IY |
468 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); |
469 | ||
a19606b4 | 470 | return total_len; |
f5fc0f86 LC |
471 | } |
472 | ||
af7fbb28 EP |
473 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, |
474 | enum ieee80211_band rate_band) | |
830fb67b JO |
475 | { |
476 | struct ieee80211_supported_band *band; | |
477 | u32 enabled_rates = 0; | |
478 | int bit; | |
479 | ||
af7fbb28 | 480 | band = wl->hw->wiphy->bands[rate_band]; |
830fb67b JO |
481 | for (bit = 0; bit < band->n_bitrates; bit++) { |
482 | if (rate_set & 0x1) | |
483 | enabled_rates |= band->bitrates[bit].hw_value; | |
484 | rate_set >>= 1; | |
485 | } | |
486 | ||
18357850 SL |
487 | /* MCS rates indication are on bits 16 - 23 */ |
488 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
489 | ||
490 | for (bit = 0; bit < 8; bit++) { | |
491 | if (rate_set & 0x1) | |
492 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
493 | rate_set >>= 1; | |
494 | } | |
18357850 | 495 | |
830fb67b JO |
496 | return enabled_rates; |
497 | } | |
498 | ||
a8c0ddb5 | 499 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
500 | { |
501 | unsigned long flags; | |
708bb3cf | 502 | int i; |
2fe33e8c | 503 | |
708bb3cf AN |
504 | for (i = 0; i < NUM_TX_QUEUES; i++) { |
505 | if (test_bit(i, &wl->stopped_queues_map) && | |
f1a46384 | 506 | wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
708bb3cf AN |
507 | /* firmware buffer has space, restart queues */ |
508 | spin_lock_irqsave(&wl->wl_lock, flags); | |
509 | ieee80211_wake_queue(wl->hw, | |
510 | wl1271_tx_get_mac80211_queue(i)); | |
511 | clear_bit(i, &wl->stopped_queues_map); | |
512 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
513 | } | |
2fe33e8c IY |
514 | } |
515 | } | |
516 | ||
742246f8 AN |
517 | static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl, |
518 | struct sk_buff_head *queues) | |
519 | { | |
520 | int i, q = -1, ac; | |
521 | u32 min_pkts = 0xffffffff; | |
522 | ||
523 | /* | |
524 | * Find a non-empty ac where: | |
525 | * 1. There are packets to transmit | |
526 | * 2. The FW has the least allocated blocks | |
527 | * | |
528 | * We prioritize the ACs according to VO>VI>BE>BK | |
529 | */ | |
530 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
531 | ac = wl1271_tx_get_queue(i); | |
532 | if (!skb_queue_empty(&queues[ac]) && | |
533 | (wl->tx_allocated_pkts[ac] < min_pkts)) { | |
534 | q = ac; | |
535 | min_pkts = wl->tx_allocated_pkts[q]; | |
536 | } | |
537 | } | |
538 | ||
539 | if (q == -1) | |
540 | return NULL; | |
541 | ||
542 | return &queues[q]; | |
543 | } | |
544 | ||
d6a3cc2e EP |
545 | static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl, |
546 | struct wl1271_link *lnk) | |
6742f554 | 547 | { |
d6a3cc2e | 548 | struct sk_buff *skb; |
6742f554 | 549 | unsigned long flags; |
742246f8 | 550 | struct sk_buff_head *queue; |
6742f554 | 551 | |
d6a3cc2e | 552 | queue = wl1271_select_queue(wl, lnk->tx_queue); |
742246f8 | 553 | if (!queue) |
d6a3cc2e | 554 | return NULL; |
742246f8 AN |
555 | |
556 | skb = skb_dequeue(queue); | |
6742f554 | 557 | if (skb) { |
f1a46384 | 558 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
6742f554 | 559 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 560 | wl->tx_queue_count[q]--; |
6742f554 JO |
561 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
562 | } | |
563 | ||
564 | return skb; | |
565 | } | |
566 | ||
d6a3cc2e EP |
567 | static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl, |
568 | struct wl12xx_vif *wlvif) | |
a8c0ddb5 AN |
569 | { |
570 | struct sk_buff *skb = NULL; | |
a8c0ddb5 AN |
571 | int i, h, start_hlid; |
572 | ||
573 | /* start from the link after the last one */ | |
4438aca9 | 574 | start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
575 | |
576 | /* dequeue according to AC, round robin on each link */ | |
c7ffb902 EP |
577 | for (i = 0; i < WL12XX_MAX_LINKS; i++) { |
578 | h = (start_hlid + i) % WL12XX_MAX_LINKS; | |
a8c0ddb5 | 579 | |
742246f8 | 580 | /* only consider connected stations */ |
c7ffb902 | 581 | if (!test_bit(h, wlvif->links_map)) |
742246f8 AN |
582 | continue; |
583 | ||
d6a3cc2e EP |
584 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]); |
585 | if (!skb) | |
742246f8 AN |
586 | continue; |
587 | ||
d6a3cc2e EP |
588 | wlvif->last_tx_hlid = h; |
589 | break; | |
a8c0ddb5 AN |
590 | } |
591 | ||
d6a3cc2e | 592 | if (!skb) |
4438aca9 | 593 | wlvif->last_tx_hlid = 0; |
a8c0ddb5 AN |
594 | |
595 | return skb; | |
596 | } | |
597 | ||
a32d0cdf | 598 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) |
a8c0ddb5 | 599 | { |
990f5de7 | 600 | unsigned long flags; |
e4120df9 | 601 | struct wl12xx_vif *wlvif = wl->last_wlvif; |
990f5de7 IY |
602 | struct sk_buff *skb = NULL; |
603 | ||
e4120df9 EP |
604 | if (wlvif) { |
605 | wl12xx_for_each_wlvif_continue(wl, wlvif) { | |
606 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
607 | if (skb) { | |
608 | wl->last_wlvif = wlvif; | |
609 | break; | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
614 | /* do another pass */ | |
615 | if (!skb) { | |
616 | wl12xx_for_each_wlvif(wl, wlvif) { | |
617 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
618 | if (skb) { | |
619 | wl->last_wlvif = wlvif; | |
620 | break; | |
621 | } | |
622 | } | |
a32d0cdf EP |
623 | } |
624 | ||
0f168014 EP |
625 | if (!skb) |
626 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]); | |
627 | ||
990f5de7 IY |
628 | if (!skb && |
629 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
f1a46384 AN |
630 | int q; |
631 | ||
990f5de7 | 632 | skb = wl->dummy_packet; |
f1a46384 | 633 | q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
990f5de7 | 634 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 635 | wl->tx_queue_count[q]--; |
990f5de7 IY |
636 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
637 | } | |
638 | ||
639 | return skb; | |
a8c0ddb5 AN |
640 | } |
641 | ||
d6a3cc2e | 642 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 | 643 | struct sk_buff *skb) |
6742f554 JO |
644 | { |
645 | unsigned long flags; | |
646 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
647 | ||
990f5de7 IY |
648 | if (wl12xx_is_dummy_packet(wl, skb)) { |
649 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
d6a3cc2e EP |
650 | } else { |
651 | u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); | |
a8c0ddb5 AN |
652 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); |
653 | ||
654 | /* make sure we dequeue the same packet next time */ | |
4438aca9 | 655 | wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) % |
d6a3cc2e | 656 | WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
657 | } |
658 | ||
6742f554 | 659 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 660 | wl->tx_queue_count[q]++; |
6742f554 JO |
661 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
662 | } | |
663 | ||
77ddaa10 EP |
664 | static bool wl1271_tx_is_data_present(struct sk_buff *skb) |
665 | { | |
666 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); | |
667 | ||
668 | return ieee80211_is_data_present(hdr->frame_control); | |
669 | } | |
670 | ||
9eb599e9 EP |
671 | void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids) |
672 | { | |
673 | struct wl12xx_vif *wlvif; | |
674 | u32 timeout; | |
675 | u8 hlid; | |
676 | ||
677 | if (!wl->conf.rx_streaming.interval) | |
678 | return; | |
679 | ||
680 | if (!wl->conf.rx_streaming.always && | |
681 | !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)) | |
682 | return; | |
683 | ||
684 | timeout = wl->conf.rx_streaming.duration; | |
685 | wl12xx_for_each_wlvif_sta(wl, wlvif) { | |
686 | bool found = false; | |
687 | for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) { | |
688 | if (test_bit(hlid, wlvif->links_map)) { | |
689 | found = true; | |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
694 | if (!found) | |
695 | continue; | |
696 | ||
697 | /* enable rx streaming */ | |
0744bdb6 | 698 | if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags)) |
9eb599e9 EP |
699 | ieee80211_queue_work(wl->hw, |
700 | &wlvif->rx_streaming_enable_work); | |
701 | ||
702 | mod_timer(&wlvif->rx_streaming_timer, | |
703 | jiffies + msecs_to_jiffies(timeout)); | |
704 | } | |
705 | } | |
706 | ||
a32d0cdf | 707 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 708 | { |
a32d0cdf | 709 | struct wl12xx_vif *wlvif; |
f5fc0f86 | 710 | struct sk_buff *skb; |
9eb599e9 | 711 | struct wl1271_tx_hw_descr *desc; |
6c6e669e IY |
712 | u32 buf_offset = 0; |
713 | bool sent_packets = false; | |
9eb599e9 | 714 | unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0}; |
f5fc0f86 LC |
715 | int ret; |
716 | ||
f5fc0f86 | 717 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 718 | return; |
f5fc0f86 | 719 | |
a32d0cdf | 720 | while ((skb = wl1271_skb_dequeue(wl))) { |
0f168014 | 721 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9eb599e9 EP |
722 | bool has_data = false; |
723 | ||
a32d0cdf | 724 | wlvif = NULL; |
0f168014 EP |
725 | if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif) |
726 | wlvif = wl12xx_vif_to_data(info->control.vif); | |
a32d0cdf | 727 | |
9eb599e9 | 728 | has_data = wlvif && wl1271_tx_is_data_present(skb); |
a32d0cdf | 729 | ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset); |
6c6e669e | 730 | if (ret == -EAGAIN) { |
a19606b4 | 731 | /* |
6c6e669e IY |
732 | * Aggregation buffer is full. |
733 | * Flush buffer and try again. | |
734 | */ | |
d6a3cc2e | 735 | wl1271_skb_queue_head(wl, wlvif, skb); |
6c6e669e | 736 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 737 | buf_offset, true); |
6c6e669e IY |
738 | sent_packets = true; |
739 | buf_offset = 0; | |
740 | continue; | |
741 | } else if (ret == -EBUSY) { | |
742 | /* | |
743 | * Firmware buffer is full. | |
a19606b4 IY |
744 | * Queue back last skb, and stop aggregating. |
745 | */ | |
d6a3cc2e | 746 | wl1271_skb_queue_head(wl, wlvif, skb); |
a522550a IY |
747 | /* No work left, avoid scheduling redundant tx work */ |
748 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 749 | goto out_ack; |
f5fc0f86 LC |
750 | } else if (ret < 0) { |
751 | dev_kfree_skb(skb); | |
ffb591cd | 752 | goto out_ack; |
f5fc0f86 | 753 | } |
a19606b4 IY |
754 | buf_offset += ret; |
755 | wl->tx_packets_count++; | |
9eb599e9 EP |
756 | if (has_data) { |
757 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
758 | __set_bit(desc->hlid, active_hlids); | |
759 | } | |
f5fc0f86 LC |
760 | } |
761 | ||
ffb591cd | 762 | out_ack: |
a19606b4 IY |
763 | if (buf_offset) { |
764 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
765 | buf_offset, true); | |
6c6e669e IY |
766 | sent_packets = true; |
767 | } | |
768 | if (sent_packets) { | |
606ea9fa IY |
769 | /* |
770 | * Interrupt the firmware with the new packets. This is only | |
771 | * required for older hardware revisions | |
772 | */ | |
773 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
774 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
775 | wl->tx_packets_count); | |
776 | ||
a8c0ddb5 | 777 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 778 | } |
9eb599e9 | 779 | wl12xx_rearm_rx_streaming(wl, active_hlids); |
a522550a | 780 | } |
f5fc0f86 | 781 | |
a522550a IY |
782 | void wl1271_tx_work(struct work_struct *work) |
783 | { | |
784 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 785 | int ret; |
a522550a IY |
786 | |
787 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
788 | ret = wl1271_ps_elp_wakeup(wl); |
789 | if (ret < 0) | |
790 | goto out; | |
791 | ||
a32d0cdf | 792 | wl1271_tx_work_locked(wl); |
c1b193eb | 793 | |
c75bbcdb | 794 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 795 | out: |
f5fc0f86 LC |
796 | mutex_unlock(&wl->mutex); |
797 | } | |
798 | ||
799 | static void wl1271_tx_complete_packet(struct wl1271 *wl, | |
800 | struct wl1271_tx_hw_res_descr *result) | |
801 | { | |
f5fc0f86 | 802 | struct ieee80211_tx_info *info; |
48e93e40 EP |
803 | struct ieee80211_vif *vif; |
804 | struct wl12xx_vif *wlvif; | |
f5fc0f86 | 805 | struct sk_buff *skb; |
f5fc0f86 | 806 | int id = result->id; |
31627dc5 JO |
807 | int rate = -1; |
808 | u8 retries = 0; | |
f5fc0f86 LC |
809 | |
810 | /* check for id legality */ | |
ffb591cd | 811 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
812 | wl1271_warning("TX result illegal id: %d", id); |
813 | return; | |
814 | } | |
815 | ||
816 | skb = wl->tx_frames[id]; | |
817 | info = IEEE80211_SKB_CB(skb); | |
818 | ||
990f5de7 | 819 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
820 | wl1271_free_tx_id(wl, id); |
821 | return; | |
822 | } | |
823 | ||
48e93e40 EP |
824 | /* info->control is valid as long as we don't update info->status */ |
825 | vif = info->control.vif; | |
826 | wlvif = wl12xx_vif_to_data(vif); | |
827 | ||
31627dc5 JO |
828 | /* update the TX status info */ |
829 | if (result->status == TX_SUCCESS) { | |
830 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 831 | info->flags |= IEEE80211_TX_STAT_ACK; |
1b92f15e EP |
832 | rate = wl1271_rate_to_idx(result->rate_class_index, |
833 | wlvif->band); | |
31627dc5 JO |
834 | retries = result->ack_failures; |
835 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
836 | wl->stats.excessive_retries++; | |
837 | retries = result->ack_failures; | |
f5fc0f86 LC |
838 | } |
839 | ||
31627dc5 JO |
840 | info->status.rates[0].idx = rate; |
841 | info->status.rates[0].count = retries; | |
842 | info->status.rates[0].flags = 0; | |
843 | info->status.ack_signal = -1; | |
844 | ||
f5fc0f86 LC |
845 | wl->stats.retry_count += result->ack_failures; |
846 | ||
b992c682 OK |
847 | /* |
848 | * update sequence number only when relevant, i.e. only in | |
849 | * sessions of TKIP, AES and GEM (not in open or WEP sessions) | |
850 | */ | |
851 | if (info->control.hw_key && | |
852 | (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || | |
853 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || | |
854 | info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { | |
855 | u8 fw_lsb = result->tx_security_sequence_number_lsb; | |
48e93e40 | 856 | u8 cur_lsb = wlvif->tx_security_last_seq_lsb; |
b992c682 OK |
857 | |
858 | /* | |
859 | * update security sequence number, taking care of potential | |
860 | * wrap-around | |
861 | */ | |
48e93e40 EP |
862 | wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff; |
863 | wlvif->tx_security_last_seq_lsb = fw_lsb; | |
b992c682 | 864 | } |
ac4e4ce5 | 865 | |
1e2b7976 JO |
866 | /* remove private header from packet */ |
867 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
868 | ||
869 | /* remove TKIP header space if present */ | |
f5fc0f86 | 870 | if (info->control.hw_key && |
97359d12 | 871 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
872 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
873 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
874 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
875 | } | |
f5fc0f86 LC |
876 | |
877 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
878 | " status 0x%x", | |
879 | result->id, skb, result->ack_failures, | |
880 | result->rate_class_index, result->status); | |
881 | ||
f5fc0f86 | 882 | /* return the packet to the stack */ |
a620865e | 883 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
92ef8960 | 884 | queue_work(wl->freezable_wq, &wl->netstack_work); |
25eeb9e3 | 885 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
886 | } |
887 | ||
888 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 889 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
890 | { |
891 | struct wl1271_acx_mem_map *memmap = | |
892 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 893 | u32 count, fw_counter; |
f5fc0f86 LC |
894 | u32 i; |
895 | ||
f5fc0f86 | 896 | /* read the tx results from the chipset */ |
7b048c52 TP |
897 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
898 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
899 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
900 | ||
901 | /* write host counter to chipset (to ack) */ | |
902 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
903 | offsetof(struct wl1271_tx_hw_res_if, | |
904 | tx_result_host_counter), fw_counter); | |
905 | ||
906 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 907 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
908 | |
909 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 910 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 911 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
912 | |
913 | /* process the results */ | |
914 | for (i = 0; i < count; i++) { | |
915 | struct wl1271_tx_hw_res_descr *result; | |
916 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
917 | ||
918 | /* process the packet */ | |
919 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
920 | wl1271_tx_complete_packet(wl, result); | |
921 | ||
922 | wl->tx_results_count++; | |
923 | } | |
f5fc0f86 LC |
924 | } |
925 | ||
a8c0ddb5 AN |
926 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
927 | { | |
928 | struct sk_buff *skb; | |
f1a46384 | 929 | int i; |
a8c0ddb5 | 930 | unsigned long flags; |
1d36cd89 | 931 | struct ieee80211_tx_info *info; |
f1a46384 | 932 | int total[NUM_TX_QUEUES]; |
a8c0ddb5 AN |
933 | |
934 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
f1a46384 | 935 | total[i] = 0; |
a8c0ddb5 AN |
936 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { |
937 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
79ebec76 AN |
938 | |
939 | if (!wl12xx_is_dummy_packet(wl, skb)) { | |
940 | info = IEEE80211_SKB_CB(skb); | |
941 | info->status.rates[0].idx = -1; | |
942 | info->status.rates[0].count = 0; | |
943 | ieee80211_tx_status_ni(wl->hw, skb); | |
944 | } | |
945 | ||
f1a46384 | 946 | total[i]++; |
a8c0ddb5 AN |
947 | } |
948 | } | |
949 | ||
950 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 AN |
951 | for (i = 0; i < NUM_TX_QUEUES; i++) |
952 | wl->tx_queue_count[i] -= total[i]; | |
a8c0ddb5 AN |
953 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
954 | ||
955 | wl1271_handle_tx_low_watermark(wl); | |
956 | } | |
957 | ||
7dece1c8 | 958 | /* caller must hold wl->mutex and TX must be stopped */ |
d6a3cc2e | 959 | void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
f5fc0f86 LC |
960 | { |
961 | int i; | |
f5fc0f86 LC |
962 | |
963 | /* TX failure */ | |
d6a3cc2e EP |
964 | for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) { |
965 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) | |
c7ffb902 | 966 | wl1271_free_sta(wl, wlvif, i); |
d6a3cc2e EP |
967 | else |
968 | wlvif->sta.ba_rx_bitmap = 0; | |
f1acea9a | 969 | |
d6a3cc2e EP |
970 | wl1271_tx_reset_link_queues(wl, i); |
971 | wl->links[i].allocated_pkts = 0; | |
972 | wl->links[i].prev_freed_pkts = 0; | |
f5fc0f86 | 973 | } |
d6a3cc2e EP |
974 | wlvif->last_tx_hlid = 0; |
975 | ||
976 | } | |
977 | /* caller must hold wl->mutex and TX must be stopped */ | |
978 | void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues) | |
979 | { | |
980 | int i; | |
981 | struct sk_buff *skb; | |
982 | struct ieee80211_tx_info *info; | |
a8c0ddb5 | 983 | |
f1acea9a AN |
984 | for (i = 0; i < NUM_TX_QUEUES; i++) |
985 | wl->tx_queue_count[i] = 0; | |
986 | ||
708bb3cf | 987 | wl->stopped_queues_map = 0; |
f5fc0f86 | 988 | |
2fe33e8c IY |
989 | /* |
990 | * Make sure the driver is at a consistent state, in case this | |
991 | * function is called from a context other than interface removal. | |
7dece1c8 | 992 | * This call will always wake the TX queues. |
2fe33e8c | 993 | */ |
7dece1c8 AN |
994 | if (reset_tx_queues) |
995 | wl1271_handle_tx_low_watermark(wl); | |
2fe33e8c | 996 | |
50e9f746 IY |
997 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
998 | if (wl->tx_frames[i] == NULL) | |
999 | continue; | |
1000 | ||
1001 | skb = wl->tx_frames[i]; | |
1002 | wl1271_free_tx_id(wl, i); | |
1003 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
1004 | ||
990f5de7 | 1005 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
1006 | /* |
1007 | * Remove private headers before passing the skb to | |
1008 | * mac80211 | |
1009 | */ | |
1010 | info = IEEE80211_SKB_CB(skb); | |
1011 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
1012 | if (info->control.hw_key && | |
1013 | info->control.hw_key->cipher == | |
1014 | WLAN_CIPHER_SUITE_TKIP) { | |
1015 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1016 | memmove(skb->data + WL1271_TKIP_IV_SPACE, | |
1017 | skb->data, hdrlen); | |
1018 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
1019 | } | |
50e9f746 | 1020 | |
ae47c45f SL |
1021 | info->status.rates[0].idx = -1; |
1022 | info->status.rates[0].count = 0; | |
50e9f746 | 1023 | |
c27d3acc | 1024 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 1025 | } |
50e9f746 | 1026 | } |
781608c4 JO |
1027 | } |
1028 | ||
1029 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
1030 | ||
1031 | /* caller must *NOT* hold wl->mutex */ | |
1032 | void wl1271_tx_flush(struct wl1271 *wl) | |
1033 | { | |
1034 | unsigned long timeout; | |
1035 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
1036 | ||
1037 | while (!time_after(jiffies, timeout)) { | |
1038 | mutex_lock(&wl->mutex); | |
a8c0ddb5 | 1039 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
f1a46384 AN |
1040 | wl->tx_frames_cnt, |
1041 | wl1271_tx_total_queue_count(wl)); | |
1042 | if ((wl->tx_frames_cnt == 0) && | |
1043 | (wl1271_tx_total_queue_count(wl) == 0)) { | |
781608c4 JO |
1044 | mutex_unlock(&wl->mutex); |
1045 | return; | |
1046 | } | |
1047 | mutex_unlock(&wl->mutex); | |
1048 | msleep(1); | |
1049 | } | |
1050 | ||
1051 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 1052 | } |
e0fe371b | 1053 | |
af7fbb28 | 1054 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) |
e0fe371b | 1055 | { |
af7fbb28 EP |
1056 | if (WARN_ON(!rate_set)) |
1057 | return 0; | |
e0fe371b | 1058 | |
af7fbb28 | 1059 | return BIT(__ffs(rate_set)); |
e0fe371b | 1060 | } |