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" | |
f5fc0f86 | 33 | |
7f179b46 AN |
34 | static int wl1271_set_default_wep_key(struct wl1271 *wl, u8 id) |
35 | { | |
36 | int ret; | |
37 | bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS); | |
38 | ||
39 | if (is_ap) | |
c690ec81 EP |
40 | ret = wl12xx_cmd_set_default_wep_key(wl, id, |
41 | WL1271_AP_BROADCAST_HLID); | |
7f179b46 | 42 | else |
c690ec81 | 43 | ret = wl12xx_cmd_set_default_wep_key(wl, id, wl->sta_hlid); |
7f179b46 AN |
44 | |
45 | if (ret < 0) | |
46 | return ret; | |
47 | ||
48 | wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); | |
49 | return 0; | |
50 | } | |
51 | ||
25eeb9e3 | 52 | static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) |
f5fc0f86 | 53 | { |
25eeb9e3 IY |
54 | int id; |
55 | ||
56 | id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS); | |
57 | if (id >= ACX_TX_DESCRIPTORS) | |
58 | return -EBUSY; | |
59 | ||
60 | __set_bit(id, wl->tx_frames_map); | |
61 | wl->tx_frames[id] = skb; | |
62 | wl->tx_frames_cnt++; | |
63 | return id; | |
64 | } | |
f5fc0f86 | 65 | |
25eeb9e3 IY |
66 | static void wl1271_free_tx_id(struct wl1271 *wl, int id) |
67 | { | |
68 | if (__test_and_clear_bit(id, wl->tx_frames_map)) { | |
ef2e3004 IY |
69 | if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS)) |
70 | clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
71 | ||
25eeb9e3 IY |
72 | wl->tx_frames[id] = NULL; |
73 | wl->tx_frames_cnt--; | |
74 | } | |
f5fc0f86 LC |
75 | } |
76 | ||
c5745187 OBC |
77 | static int wl1271_tx_update_filters(struct wl1271 *wl, |
78 | struct sk_buff *skb) | |
79 | { | |
80 | struct ieee80211_hdr *hdr; | |
81 | ||
82 | hdr = (struct ieee80211_hdr *)(skb->data + | |
83 | sizeof(struct wl1271_tx_hw_descr)); | |
84 | ||
85 | /* | |
86 | * stop bssid-based filtering before transmitting authentication | |
87 | * requests. this way the hw will never drop authentication | |
88 | * responses coming from BSSIDs it isn't familiar with (e.g. on | |
89 | * roaming) | |
90 | */ | |
91 | if (!ieee80211_is_auth(hdr->frame_control)) | |
92 | return 0; | |
93 | ||
08c1d1c7 | 94 | return 0; |
c5745187 OBC |
95 | } |
96 | ||
99a2775d AN |
97 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
98 | struct sk_buff *skb) | |
99 | { | |
100 | struct ieee80211_hdr *hdr; | |
101 | ||
102 | /* | |
103 | * add the station to the known list before transmitting the | |
104 | * authentication response. this way it won't get de-authed by FW | |
105 | * when transmitting too soon. | |
106 | */ | |
107 | hdr = (struct ieee80211_hdr *)(skb->data + | |
108 | sizeof(struct wl1271_tx_hw_descr)); | |
109 | if (ieee80211_is_auth(hdr->frame_control)) | |
110 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
111 | } | |
112 | ||
dbe25cb5 | 113 | #if 0 |
b622d992 AN |
114 | static void wl1271_tx_regulate_link(struct wl1271 *wl, u8 hlid) |
115 | { | |
116 | bool fw_ps; | |
117 | u8 tx_blks; | |
118 | ||
119 | /* only regulate station links */ | |
120 | if (hlid < WL1271_AP_STA_HLID_START) | |
121 | return; | |
122 | ||
123 | fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map); | |
124 | tx_blks = wl->links[hlid].allocated_blks; | |
125 | ||
126 | /* | |
127 | * if in FW PS and there is enough data in FW we can put the link | |
128 | * into high-level PS and clean out its TX queues. | |
129 | */ | |
130 | if (fw_ps && tx_blks >= WL1271_PS_STA_MAX_BLOCKS) | |
131 | wl1271_ps_link_start(wl, hlid, true); | |
132 | } | |
dbe25cb5 | 133 | #endif |
b622d992 | 134 | |
f4df1bd5 EP |
135 | static bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) |
136 | { | |
137 | return wl->dummy_packet == skb; | |
138 | } | |
139 | ||
140 | u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct sk_buff *skb) | |
a8c0ddb5 AN |
141 | { |
142 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
143 | ||
144 | if (control->control.sta) { | |
145 | struct wl1271_station *wl_sta; | |
146 | ||
147 | wl_sta = (struct wl1271_station *) | |
148 | control->control.sta->drv_priv; | |
149 | return wl_sta->hlid; | |
150 | } else { | |
151 | struct ieee80211_hdr *hdr; | |
152 | ||
f4df1bd5 EP |
153 | if (!test_bit(WL1271_FLAG_AP_STARTED, &wl->flags)) |
154 | return wl->system_hlid; | |
155 | ||
a8c0ddb5 AN |
156 | hdr = (struct ieee80211_hdr *)skb->data; |
157 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
158 | return WL1271_AP_GLOBAL_HLID; | |
159 | else | |
160 | return WL1271_AP_BROADCAST_HLID; | |
161 | } | |
162 | } | |
163 | ||
f4df1bd5 EP |
164 | static u8 wl1271_tx_get_hlid(struct wl1271 *wl, struct sk_buff *skb) |
165 | { | |
166 | if (wl12xx_is_dummy_packet(wl, skb)) | |
167 | return wl->system_hlid; | |
168 | ||
169 | if (wl->bss_type == BSS_TYPE_AP_BSS) | |
170 | return wl12xx_tx_get_hlid_ap(wl, skb); | |
171 | ||
172 | if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) | |
173 | return wl->sta_hlid; | |
174 | else | |
175 | return wl->dev_hlid; | |
176 | } | |
177 | ||
0da13da7 IY |
178 | static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl, |
179 | unsigned int packet_length) | |
180 | { | |
181 | if (wl->quirks & WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT) | |
182 | return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); | |
183 | else | |
184 | return ALIGN(packet_length, WL1271_TX_ALIGN_TO); | |
185 | } | |
186 | ||
a19606b4 | 187 | static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra, |
09039f42 | 188 | u32 buf_offset, u8 hlid) |
f5fc0f86 LC |
189 | { |
190 | struct wl1271_tx_hw_descr *desc; | |
191 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 192 | u32 len; |
5c9417f1 | 193 | u32 total_blocks; |
7bb5d6ce | 194 | int id, ret = -EBUSY; |
e7ddf549 | 195 | |
2920743a AN |
196 | /* we use 1 spare block */ |
197 | u32 spare_blocks = 1; | |
f5fc0f86 | 198 | |
a19606b4 | 199 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 200 | return -EAGAIN; |
a19606b4 | 201 | |
f5fc0f86 | 202 | /* allocate free identifier for the packet */ |
25eeb9e3 | 203 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
204 | if (id < 0) |
205 | return id; | |
206 | ||
207 | /* approximate the number of blocks required for this packet | |
208 | in the firmware */ | |
0da13da7 | 209 | len = wl12xx_calc_packet_alignment(wl, total_len); |
48a61477 SL |
210 | |
211 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + | |
e7ddf549 | 212 | spare_blocks; |
48a61477 | 213 | |
f5fc0f86 LC |
214 | if (total_blocks <= wl->tx_blocks_available) { |
215 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
216 | skb, total_len - skb->len); | |
217 | ||
ae77eccf SL |
218 | /* HW descriptor fields change between wl127x and wl128x */ |
219 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
220 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
221 | } else { | |
e7ddf549 | 222 | desc->wl127x_mem.extra_blocks = spare_blocks; |
ae77eccf SL |
223 | desc->wl127x_mem.total_mem_blocks = total_blocks; |
224 | } | |
225 | ||
f5fc0f86 LC |
226 | desc->id = id; |
227 | ||
228 | wl->tx_blocks_available -= total_blocks; | |
7bb5d6ce | 229 | wl->tx_allocated_blocks += total_blocks; |
f5fc0f86 | 230 | |
09039f42 AN |
231 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
232 | wl->links[hlid].allocated_blks += total_blocks; | |
233 | ||
f5fc0f86 LC |
234 | ret = 0; |
235 | ||
236 | wl1271_debug(DEBUG_TX, | |
237 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
238 | total_len, total_blocks, id); | |
781608c4 | 239 | } else { |
25eeb9e3 | 240 | wl1271_free_tx_id(wl, id); |
781608c4 | 241 | } |
f5fc0f86 LC |
242 | |
243 | return ret; | |
244 | } | |
245 | ||
a19606b4 | 246 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb, |
09039f42 AN |
247 | u32 extra, struct ieee80211_tx_info *control, |
248 | u8 hlid) | |
f5fc0f86 | 249 | { |
ac5e1e39 | 250 | struct timespec ts; |
f5fc0f86 | 251 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 252 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 253 | s64 hosttime; |
d0f63b20 | 254 | u16 tx_attr; |
f5fc0f86 LC |
255 | |
256 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
257 | ||
1e2b7976 JO |
258 | /* relocate space for security header */ |
259 | if (extra) { | |
260 | void *framestart = skb->data + sizeof(*desc); | |
261 | u16 fc = *(u16 *)(framestart + extra); | |
d0f63b20 | 262 | int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc)); |
1e2b7976 JO |
263 | memmove(framestart, framestart + extra, hdrlen); |
264 | } | |
265 | ||
f5fc0f86 | 266 | /* configure packet life time */ |
ac5e1e39 JO |
267 | getnstimeofday(&ts); |
268 | hosttime = (timespec_to_ns(&ts) >> 10); | |
269 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d AN |
270 | |
271 | if (wl->bss_type != BSS_TYPE_AP_BSS) | |
272 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); | |
273 | else | |
274 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 275 | |
db674d24 | 276 | /* queue */ |
c6999d83 | 277 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 278 | desc->tid = skb->priority; |
c6c8a65d | 279 | |
990f5de7 | 280 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
281 | /* |
282 | * FW expects the dummy packet to have an invalid session id - | |
283 | * any session id that is different than the one set in the join | |
284 | */ | |
285 | tx_attr = ((~wl->session_counter) << | |
286 | TX_HW_ATTR_OFST_SESSION_COUNTER) & | |
287 | TX_HW_ATTR_SESSION_COUNTER; | |
288 | ||
289 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
ae47c45f SL |
290 | } else { |
291 | /* configure the tx attributes */ | |
292 | tx_attr = | |
293 | wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER; | |
294 | } | |
295 | ||
79b122dc | 296 | desc->hlid = hlid; |
c6c8a65d | 297 | |
79b122dc | 298 | if (wl->bss_type != BSS_TYPE_AP_BSS) { |
c6c8a65d AN |
299 | /* if the packets are destined for AP (have a STA entry) |
300 | send them with AP rate policies, otherwise use default | |
301 | basic rates */ | |
302 | if (control->control.sta) | |
303 | rate_idx = ACX_TX_AP_FULL_RATE; | |
304 | else | |
305 | rate_idx = ACX_TX_BASIC_RATE; | |
306 | } else { | |
09039f42 AN |
307 | switch (hlid) { |
308 | case WL1271_AP_GLOBAL_HLID: | |
309 | rate_idx = ACX_TX_AP_MODE_MGMT_RATE; | |
310 | break; | |
311 | case WL1271_AP_BROADCAST_HLID: | |
312 | rate_idx = ACX_TX_AP_MODE_BCST_RATE; | |
313 | break; | |
314 | default: | |
c6c8a65d | 315 | rate_idx = ac; |
09039f42 | 316 | break; |
c6c8a65d AN |
317 | } |
318 | } | |
319 | ||
320 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
321 | desc->reserved = 0; |
322 | ||
0da13da7 | 323 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 324 | |
0da13da7 | 325 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
326 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
327 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
328 | |
329 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
330 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
331 | desc->hlid, tx_attr, | |
332 | le16_to_cpu(desc->length), | |
333 | le16_to_cpu(desc->life_time), | |
334 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
335 | } else { |
336 | int pad; | |
337 | ||
0da13da7 | 338 | /* Store the aligned length in terms of words */ |
48a61477 SL |
339 | desc->length = cpu_to_le16(aligned_len >> 2); |
340 | ||
341 | /* calculate number of padding bytes */ | |
342 | pad = aligned_len - skb->len; | |
343 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 344 | |
ae77eccf SL |
345 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
346 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
347 | desc->hlid, tx_attr, | |
348 | le16_to_cpu(desc->length), | |
349 | le16_to_cpu(desc->life_time), | |
350 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 351 | } |
d0f63b20 LC |
352 | |
353 | desc->tx_attr = cpu_to_le16(tx_attr); | |
f5fc0f86 LC |
354 | } |
355 | ||
356 | /* caller must hold wl->mutex */ | |
a19606b4 IY |
357 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb, |
358 | u32 buf_offset) | |
f5fc0f86 LC |
359 | { |
360 | struct ieee80211_tx_info *info; | |
361 | u32 extra = 0; | |
362 | int ret = 0; | |
a19606b4 | 363 | u32 total_len; |
09039f42 | 364 | u8 hlid; |
f5fc0f86 LC |
365 | |
366 | if (!skb) | |
367 | return -EINVAL; | |
368 | ||
369 | info = IEEE80211_SKB_CB(skb); | |
370 | ||
371 | if (info->control.hw_key && | |
97359d12 | 372 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
373 | extra = WL1271_TKIP_IV_SPACE; |
374 | ||
375 | if (info->control.hw_key) { | |
7f179b46 AN |
376 | bool is_wep; |
377 | u8 idx = info->control.hw_key->hw_key_idx; | |
378 | u32 cipher = info->control.hw_key->cipher; | |
379 | ||
380 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
381 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 382 | |
7f179b46 AN |
383 | if (unlikely(is_wep && wl->default_key != idx)) { |
384 | ret = wl1271_set_default_wep_key(wl, idx); | |
f5fc0f86 LC |
385 | if (ret < 0) |
386 | return ret; | |
ee444cf0 | 387 | wl->default_key = idx; |
f5fc0f86 LC |
388 | } |
389 | } | |
390 | ||
f4df1bd5 | 391 | hlid = wl1271_tx_get_hlid(wl, skb); |
79b122dc EP |
392 | if (hlid == WL12XX_INVALID_LINK_ID) { |
393 | wl1271_error("invalid hlid. dropping skb 0x%p", skb); | |
394 | return -EINVAL; | |
395 | } | |
09039f42 AN |
396 | |
397 | ret = wl1271_tx_allocate(wl, skb, extra, buf_offset, hlid); | |
f5fc0f86 LC |
398 | if (ret < 0) |
399 | return ret; | |
400 | ||
fae2fd76 AN |
401 | wl1271_tx_fill_hdr(wl, skb, extra, info, hlid); |
402 | ||
b622d992 | 403 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 404 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
dbe25cb5 | 405 | #if 0 |
b622d992 | 406 | wl1271_tx_regulate_link(wl, hlid); |
dbe25cb5 | 407 | #endif |
c5745187 OBC |
408 | } else { |
409 | wl1271_tx_update_filters(wl, skb); | |
b622d992 | 410 | } |
99a2775d | 411 | |
a19606b4 | 412 | /* |
48a61477 SL |
413 | * The length of each packet is stored in terms of |
414 | * words. Thus, we must pad the skb data to make sure its | |
415 | * length is aligned. The number of padding bytes is computed | |
416 | * and set in wl1271_tx_fill_hdr. | |
417 | * In special cases, we want to align to a specific block size | |
418 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 419 | */ |
0da13da7 | 420 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 421 | |
a19606b4 IY |
422 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
423 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 424 | |
990f5de7 IY |
425 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
426 | if (wl12xx_is_dummy_packet(wl, skb)) | |
427 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
428 | ||
a19606b4 | 429 | return total_len; |
f5fc0f86 LC |
430 | } |
431 | ||
ebba60c6 | 432 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set) |
830fb67b JO |
433 | { |
434 | struct ieee80211_supported_band *band; | |
435 | u32 enabled_rates = 0; | |
436 | int bit; | |
437 | ||
438 | band = wl->hw->wiphy->bands[wl->band]; | |
439 | for (bit = 0; bit < band->n_bitrates; bit++) { | |
440 | if (rate_set & 0x1) | |
441 | enabled_rates |= band->bitrates[bit].hw_value; | |
442 | rate_set >>= 1; | |
443 | } | |
444 | ||
00d20100 | 445 | #ifdef CONFIG_WL12XX_HT |
18357850 SL |
446 | /* MCS rates indication are on bits 16 - 23 */ |
447 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
448 | ||
449 | for (bit = 0; bit < 8; bit++) { | |
450 | if (rate_set & 0x1) | |
451 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
452 | rate_set >>= 1; | |
453 | } | |
454 | #endif | |
455 | ||
830fb67b JO |
456 | return enabled_rates; |
457 | } | |
458 | ||
a8c0ddb5 | 459 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
460 | { |
461 | unsigned long flags; | |
708bb3cf | 462 | int i; |
2fe33e8c | 463 | |
708bb3cf AN |
464 | for (i = 0; i < NUM_TX_QUEUES; i++) { |
465 | if (test_bit(i, &wl->stopped_queues_map) && | |
f1a46384 | 466 | wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
708bb3cf AN |
467 | /* firmware buffer has space, restart queues */ |
468 | spin_lock_irqsave(&wl->wl_lock, flags); | |
469 | ieee80211_wake_queue(wl->hw, | |
470 | wl1271_tx_get_mac80211_queue(i)); | |
471 | clear_bit(i, &wl->stopped_queues_map); | |
472 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
473 | } | |
2fe33e8c IY |
474 | } |
475 | } | |
476 | ||
a8c0ddb5 | 477 | static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl) |
6742f554 JO |
478 | { |
479 | struct sk_buff *skb = NULL; | |
480 | unsigned long flags; | |
481 | ||
7bb5d6ce AN |
482 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VO]); |
483 | if (skb) | |
6742f554 | 484 | goto out; |
7bb5d6ce AN |
485 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VI]); |
486 | if (skb) | |
487 | goto out; | |
488 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BE]); | |
489 | if (skb) | |
490 | goto out; | |
491 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BK]); | |
6742f554 JO |
492 | |
493 | out: | |
494 | if (skb) { | |
f1a46384 | 495 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
6742f554 | 496 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 497 | wl->tx_queue_count[q]--; |
6742f554 JO |
498 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
499 | } | |
500 | ||
501 | return skb; | |
502 | } | |
503 | ||
a8c0ddb5 AN |
504 | static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl) |
505 | { | |
506 | struct sk_buff *skb = NULL; | |
507 | unsigned long flags; | |
508 | int i, h, start_hlid; | |
509 | ||
510 | /* start from the link after the last one */ | |
511 | start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS; | |
512 | ||
513 | /* dequeue according to AC, round robin on each link */ | |
514 | for (i = 0; i < AP_MAX_LINKS; i++) { | |
515 | h = (start_hlid + i) % AP_MAX_LINKS; | |
516 | ||
7bb5d6ce | 517 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VO]); |
a8c0ddb5 | 518 | if (skb) |
7bb5d6ce AN |
519 | goto out; |
520 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VI]); | |
521 | if (skb) | |
522 | goto out; | |
523 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BE]); | |
524 | if (skb) | |
525 | goto out; | |
526 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BK]); | |
527 | if (skb) | |
528 | goto out; | |
a8c0ddb5 AN |
529 | } |
530 | ||
7bb5d6ce | 531 | out: |
a8c0ddb5 | 532 | if (skb) { |
f1a46384 | 533 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
a8c0ddb5 AN |
534 | wl->last_tx_hlid = h; |
535 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 | 536 | wl->tx_queue_count[q]--; |
a8c0ddb5 AN |
537 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
538 | } else { | |
539 | wl->last_tx_hlid = 0; | |
540 | } | |
541 | ||
542 | return skb; | |
543 | } | |
544 | ||
545 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) | |
546 | { | |
990f5de7 IY |
547 | unsigned long flags; |
548 | struct sk_buff *skb = NULL; | |
549 | ||
a8c0ddb5 | 550 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
990f5de7 IY |
551 | skb = wl1271_ap_skb_dequeue(wl); |
552 | else | |
553 | skb = wl1271_sta_skb_dequeue(wl); | |
a8c0ddb5 | 554 | |
990f5de7 IY |
555 | if (!skb && |
556 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
f1a46384 AN |
557 | int q; |
558 | ||
990f5de7 | 559 | skb = wl->dummy_packet; |
f1a46384 | 560 | q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
990f5de7 | 561 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 562 | wl->tx_queue_count[q]--; |
990f5de7 IY |
563 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
564 | } | |
565 | ||
566 | return skb; | |
a8c0ddb5 AN |
567 | } |
568 | ||
6742f554 JO |
569 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb) |
570 | { | |
571 | unsigned long flags; | |
572 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
573 | ||
990f5de7 IY |
574 | if (wl12xx_is_dummy_packet(wl, skb)) { |
575 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
576 | } else if (wl->bss_type == BSS_TYPE_AP_BSS) { | |
f4df1bd5 | 577 | u8 hlid = wl1271_tx_get_hlid(wl, skb); |
a8c0ddb5 AN |
578 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); |
579 | ||
580 | /* make sure we dequeue the same packet next time */ | |
581 | wl->last_tx_hlid = (hlid + AP_MAX_LINKS - 1) % AP_MAX_LINKS; | |
582 | } else { | |
583 | skb_queue_head(&wl->tx_queue[q], skb); | |
584 | } | |
585 | ||
6742f554 | 586 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 587 | wl->tx_queue_count[q]++; |
6742f554 JO |
588 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
589 | } | |
590 | ||
77ddaa10 EP |
591 | static bool wl1271_tx_is_data_present(struct sk_buff *skb) |
592 | { | |
593 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); | |
594 | ||
595 | return ieee80211_is_data_present(hdr->frame_control); | |
596 | } | |
597 | ||
a522550a | 598 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 599 | { |
f5fc0f86 | 600 | struct sk_buff *skb; |
6c6e669e IY |
601 | u32 buf_offset = 0; |
602 | bool sent_packets = false; | |
77ddaa10 EP |
603 | bool had_data = false; |
604 | bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS); | |
f5fc0f86 LC |
605 | int ret; |
606 | ||
f5fc0f86 | 607 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 608 | return; |
f5fc0f86 | 609 | |
6742f554 | 610 | while ((skb = wl1271_skb_dequeue(wl))) { |
77ddaa10 EP |
611 | if (wl1271_tx_is_data_present(skb)) |
612 | had_data = true; | |
613 | ||
a19606b4 | 614 | ret = wl1271_prepare_tx_frame(wl, skb, buf_offset); |
6c6e669e | 615 | if (ret == -EAGAIN) { |
a19606b4 | 616 | /* |
6c6e669e IY |
617 | * Aggregation buffer is full. |
618 | * Flush buffer and try again. | |
619 | */ | |
6742f554 | 620 | wl1271_skb_queue_head(wl, skb); |
6c6e669e | 621 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 622 | buf_offset, true); |
6c6e669e IY |
623 | sent_packets = true; |
624 | buf_offset = 0; | |
625 | continue; | |
626 | } else if (ret == -EBUSY) { | |
627 | /* | |
628 | * Firmware buffer is full. | |
a19606b4 IY |
629 | * Queue back last skb, and stop aggregating. |
630 | */ | |
6742f554 | 631 | wl1271_skb_queue_head(wl, skb); |
a522550a IY |
632 | /* No work left, avoid scheduling redundant tx work */ |
633 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 634 | goto out_ack; |
f5fc0f86 LC |
635 | } else if (ret < 0) { |
636 | dev_kfree_skb(skb); | |
ffb591cd | 637 | goto out_ack; |
f5fc0f86 | 638 | } |
a19606b4 IY |
639 | buf_offset += ret; |
640 | wl->tx_packets_count++; | |
f5fc0f86 LC |
641 | } |
642 | ||
ffb591cd | 643 | out_ack: |
a19606b4 IY |
644 | if (buf_offset) { |
645 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
646 | buf_offset, true); | |
6c6e669e IY |
647 | sent_packets = true; |
648 | } | |
649 | if (sent_packets) { | |
606ea9fa IY |
650 | /* |
651 | * Interrupt the firmware with the new packets. This is only | |
652 | * required for older hardware revisions | |
653 | */ | |
654 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
655 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
656 | wl->tx_packets_count); | |
657 | ||
a8c0ddb5 | 658 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 659 | } |
77ddaa10 EP |
660 | if (!is_ap && wl->conf.rx_streaming.interval && had_data && |
661 | (wl->conf.rx_streaming.always || | |
662 | test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))) { | |
663 | u32 timeout = wl->conf.rx_streaming.duration; | |
664 | ||
665 | /* enable rx streaming */ | |
666 | if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED, &wl->flags)) | |
667 | ieee80211_queue_work(wl->hw, | |
668 | &wl->rx_streaming_enable_work); | |
669 | ||
670 | mod_timer(&wl->rx_streaming_timer, | |
671 | jiffies + msecs_to_jiffies(timeout)); | |
672 | } | |
a522550a | 673 | } |
f5fc0f86 | 674 | |
a522550a IY |
675 | void wl1271_tx_work(struct work_struct *work) |
676 | { | |
677 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 678 | int ret; |
a522550a IY |
679 | |
680 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
681 | ret = wl1271_ps_elp_wakeup(wl); |
682 | if (ret < 0) | |
683 | goto out; | |
684 | ||
a522550a | 685 | wl1271_tx_work_locked(wl); |
c1b193eb | 686 | |
c75bbcdb | 687 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 688 | out: |
f5fc0f86 LC |
689 | mutex_unlock(&wl->mutex); |
690 | } | |
691 | ||
692 | static void wl1271_tx_complete_packet(struct wl1271 *wl, | |
693 | struct wl1271_tx_hw_res_descr *result) | |
694 | { | |
f5fc0f86 LC |
695 | struct ieee80211_tx_info *info; |
696 | struct sk_buff *skb; | |
f5fc0f86 | 697 | int id = result->id; |
31627dc5 JO |
698 | int rate = -1; |
699 | u8 retries = 0; | |
f5fc0f86 LC |
700 | |
701 | /* check for id legality */ | |
ffb591cd | 702 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
703 | wl1271_warning("TX result illegal id: %d", id); |
704 | return; | |
705 | } | |
706 | ||
707 | skb = wl->tx_frames[id]; | |
708 | info = IEEE80211_SKB_CB(skb); | |
709 | ||
990f5de7 | 710 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
711 | wl1271_free_tx_id(wl, id); |
712 | return; | |
713 | } | |
714 | ||
31627dc5 JO |
715 | /* update the TX status info */ |
716 | if (result->status == TX_SUCCESS) { | |
717 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 718 | info->flags |= IEEE80211_TX_STAT_ACK; |
6a2de93b | 719 | rate = wl1271_rate_to_idx(result->rate_class_index, wl->band); |
31627dc5 JO |
720 | retries = result->ack_failures; |
721 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
722 | wl->stats.excessive_retries++; | |
723 | retries = result->ack_failures; | |
f5fc0f86 LC |
724 | } |
725 | ||
31627dc5 JO |
726 | info->status.rates[0].idx = rate; |
727 | info->status.rates[0].count = retries; | |
728 | info->status.rates[0].flags = 0; | |
729 | info->status.ack_signal = -1; | |
730 | ||
f5fc0f86 LC |
731 | wl->stats.retry_count += result->ack_failures; |
732 | ||
b992c682 OK |
733 | /* |
734 | * update sequence number only when relevant, i.e. only in | |
735 | * sessions of TKIP, AES and GEM (not in open or WEP sessions) | |
736 | */ | |
737 | if (info->control.hw_key && | |
738 | (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || | |
739 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || | |
740 | info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { | |
741 | u8 fw_lsb = result->tx_security_sequence_number_lsb; | |
742 | u8 cur_lsb = wl->tx_security_last_seq_lsb; | |
743 | ||
744 | /* | |
745 | * update security sequence number, taking care of potential | |
746 | * wrap-around | |
747 | */ | |
748 | wl->tx_security_seq += (fw_lsb - cur_lsb + 256) % 256; | |
749 | wl->tx_security_last_seq_lsb = fw_lsb; | |
750 | } | |
ac4e4ce5 | 751 | |
1e2b7976 JO |
752 | /* remove private header from packet */ |
753 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
754 | ||
755 | /* remove TKIP header space if present */ | |
f5fc0f86 | 756 | if (info->control.hw_key && |
97359d12 | 757 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
758 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
759 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
760 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
761 | } | |
f5fc0f86 LC |
762 | |
763 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
764 | " status 0x%x", | |
765 | result->id, skb, result->ack_failures, | |
766 | result->rate_class_index, result->status); | |
767 | ||
f5fc0f86 | 768 | /* return the packet to the stack */ |
a620865e | 769 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
92ef8960 | 770 | queue_work(wl->freezable_wq, &wl->netstack_work); |
25eeb9e3 | 771 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
772 | } |
773 | ||
774 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 775 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
776 | { |
777 | struct wl1271_acx_mem_map *memmap = | |
778 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 779 | u32 count, fw_counter; |
f5fc0f86 LC |
780 | u32 i; |
781 | ||
f5fc0f86 | 782 | /* read the tx results from the chipset */ |
7b048c52 TP |
783 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
784 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
785 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
786 | ||
787 | /* write host counter to chipset (to ack) */ | |
788 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
789 | offsetof(struct wl1271_tx_hw_res_if, | |
790 | tx_result_host_counter), fw_counter); | |
791 | ||
792 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 793 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
794 | |
795 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 796 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 797 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
798 | |
799 | /* process the results */ | |
800 | for (i = 0; i < count; i++) { | |
801 | struct wl1271_tx_hw_res_descr *result; | |
802 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
803 | ||
804 | /* process the packet */ | |
805 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
806 | wl1271_tx_complete_packet(wl, result); | |
807 | ||
808 | wl->tx_results_count++; | |
809 | } | |
f5fc0f86 LC |
810 | } |
811 | ||
a8c0ddb5 AN |
812 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
813 | { | |
814 | struct sk_buff *skb; | |
f1a46384 | 815 | int i; |
a8c0ddb5 | 816 | unsigned long flags; |
1d36cd89 | 817 | struct ieee80211_tx_info *info; |
f1a46384 | 818 | int total[NUM_TX_QUEUES]; |
a8c0ddb5 AN |
819 | |
820 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
f1a46384 | 821 | total[i] = 0; |
a8c0ddb5 AN |
822 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { |
823 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
1d36cd89 AN |
824 | info = IEEE80211_SKB_CB(skb); |
825 | info->status.rates[0].idx = -1; | |
826 | info->status.rates[0].count = 0; | |
c27d3acc | 827 | ieee80211_tx_status_ni(wl->hw, skb); |
f1a46384 | 828 | total[i]++; |
a8c0ddb5 AN |
829 | } |
830 | } | |
831 | ||
832 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 AN |
833 | for (i = 0; i < NUM_TX_QUEUES; i++) |
834 | wl->tx_queue_count[i] -= total[i]; | |
a8c0ddb5 AN |
835 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
836 | ||
837 | wl1271_handle_tx_low_watermark(wl); | |
838 | } | |
839 | ||
7dece1c8 AN |
840 | /* caller must hold wl->mutex and TX must be stopped */ |
841 | void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues) | |
f5fc0f86 LC |
842 | { |
843 | int i; | |
844 | struct sk_buff *skb; | |
1d36cd89 | 845 | struct ieee80211_tx_info *info; |
f5fc0f86 LC |
846 | |
847 | /* TX failure */ | |
a8c0ddb5 | 848 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
09039f42 | 849 | for (i = 0; i < AP_MAX_LINKS; i++) { |
a8c0ddb5 | 850 | wl1271_tx_reset_link_queues(wl, i); |
09039f42 AN |
851 | wl->links[i].allocated_blks = 0; |
852 | wl->links[i].prev_freed_blks = 0; | |
853 | } | |
a8c0ddb5 AN |
854 | |
855 | wl->last_tx_hlid = 0; | |
856 | } else { | |
857 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
858 | while ((skb = skb_dequeue(&wl->tx_queue[i]))) { | |
859 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", | |
860 | skb); | |
ae47c45f | 861 | |
990f5de7 | 862 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
863 | info = IEEE80211_SKB_CB(skb); |
864 | info->status.rates[0].idx = -1; | |
865 | info->status.rates[0].count = 0; | |
c27d3acc | 866 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 867 | } |
a8c0ddb5 | 868 | } |
f1a46384 | 869 | wl->tx_queue_count[i] = 0; |
6742f554 | 870 | } |
f5fc0f86 | 871 | } |
a8c0ddb5 | 872 | |
708bb3cf | 873 | wl->stopped_queues_map = 0; |
f5fc0f86 | 874 | |
2fe33e8c IY |
875 | /* |
876 | * Make sure the driver is at a consistent state, in case this | |
877 | * function is called from a context other than interface removal. | |
7dece1c8 | 878 | * This call will always wake the TX queues. |
2fe33e8c | 879 | */ |
7dece1c8 AN |
880 | if (reset_tx_queues) |
881 | wl1271_handle_tx_low_watermark(wl); | |
2fe33e8c | 882 | |
50e9f746 IY |
883 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
884 | if (wl->tx_frames[i] == NULL) | |
885 | continue; | |
886 | ||
887 | skb = wl->tx_frames[i]; | |
888 | wl1271_free_tx_id(wl, i); | |
889 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
890 | ||
990f5de7 | 891 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
892 | /* |
893 | * Remove private headers before passing the skb to | |
894 | * mac80211 | |
895 | */ | |
896 | info = IEEE80211_SKB_CB(skb); | |
897 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
898 | if (info->control.hw_key && | |
899 | info->control.hw_key->cipher == | |
900 | WLAN_CIPHER_SUITE_TKIP) { | |
901 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
902 | memmove(skb->data + WL1271_TKIP_IV_SPACE, | |
903 | skb->data, hdrlen); | |
904 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
905 | } | |
50e9f746 | 906 | |
ae47c45f SL |
907 | info->status.rates[0].idx = -1; |
908 | info->status.rates[0].count = 0; | |
50e9f746 | 909 | |
c27d3acc | 910 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 911 | } |
50e9f746 | 912 | } |
781608c4 JO |
913 | } |
914 | ||
915 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
916 | ||
917 | /* caller must *NOT* hold wl->mutex */ | |
918 | void wl1271_tx_flush(struct wl1271 *wl) | |
919 | { | |
920 | unsigned long timeout; | |
921 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
922 | ||
923 | while (!time_after(jiffies, timeout)) { | |
924 | mutex_lock(&wl->mutex); | |
a8c0ddb5 | 925 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
f1a46384 AN |
926 | wl->tx_frames_cnt, |
927 | wl1271_tx_total_queue_count(wl)); | |
928 | if ((wl->tx_frames_cnt == 0) && | |
929 | (wl1271_tx_total_queue_count(wl) == 0)) { | |
781608c4 JO |
930 | mutex_unlock(&wl->mutex); |
931 | return; | |
932 | } | |
933 | mutex_unlock(&wl->mutex); | |
934 | msleep(1); | |
935 | } | |
936 | ||
937 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 938 | } |
e0fe371b AN |
939 | |
940 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl) | |
941 | { | |
942 | int i; | |
943 | u32 rate = 0; | |
944 | ||
945 | if (!wl->basic_rate_set) { | |
946 | WARN_ON(1); | |
947 | wl->basic_rate_set = wl->conf.tx.basic_rate; | |
948 | } | |
949 | ||
950 | for (i = 0; !rate; i++) { | |
951 | if ((wl->basic_rate_set >> i) & 0x1) | |
952 | rate = 1 << i; | |
953 | } | |
954 | ||
955 | return rate; | |
956 | } |