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) | |
40 | ret = wl1271_cmd_set_ap_default_wep_key(wl, id); | |
41 | else | |
42 | ret = wl1271_cmd_set_sta_default_wep_key(wl, id); | |
43 | ||
44 | if (ret < 0) | |
45 | return ret; | |
46 | ||
47 | wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); | |
48 | return 0; | |
49 | } | |
50 | ||
25eeb9e3 | 51 | static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) |
f5fc0f86 | 52 | { |
25eeb9e3 IY |
53 | int id; |
54 | ||
55 | id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS); | |
56 | if (id >= ACX_TX_DESCRIPTORS) | |
57 | return -EBUSY; | |
58 | ||
59 | __set_bit(id, wl->tx_frames_map); | |
60 | wl->tx_frames[id] = skb; | |
61 | wl->tx_frames_cnt++; | |
62 | return id; | |
63 | } | |
f5fc0f86 | 64 | |
25eeb9e3 IY |
65 | static void wl1271_free_tx_id(struct wl1271 *wl, int id) |
66 | { | |
67 | if (__test_and_clear_bit(id, wl->tx_frames_map)) { | |
68 | wl->tx_frames[id] = NULL; | |
69 | wl->tx_frames_cnt--; | |
70 | } | |
f5fc0f86 LC |
71 | } |
72 | ||
99a2775d AN |
73 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
74 | struct sk_buff *skb) | |
75 | { | |
76 | struct ieee80211_hdr *hdr; | |
77 | ||
78 | /* | |
79 | * add the station to the known list before transmitting the | |
80 | * authentication response. this way it won't get de-authed by FW | |
81 | * when transmitting too soon. | |
82 | */ | |
83 | hdr = (struct ieee80211_hdr *)(skb->data + | |
84 | sizeof(struct wl1271_tx_hw_descr)); | |
85 | if (ieee80211_is_auth(hdr->frame_control)) | |
86 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
87 | } | |
88 | ||
b622d992 AN |
89 | static void wl1271_tx_regulate_link(struct wl1271 *wl, u8 hlid) |
90 | { | |
91 | bool fw_ps; | |
92 | u8 tx_blks; | |
93 | ||
94 | /* only regulate station links */ | |
95 | if (hlid < WL1271_AP_STA_HLID_START) | |
96 | return; | |
97 | ||
98 | fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map); | |
99 | tx_blks = wl->links[hlid].allocated_blks; | |
100 | ||
101 | /* | |
102 | * if in FW PS and there is enough data in FW we can put the link | |
103 | * into high-level PS and clean out its TX queues. | |
104 | */ | |
105 | if (fw_ps && tx_blks >= WL1271_PS_STA_MAX_BLOCKS) | |
106 | wl1271_ps_link_start(wl, hlid, true); | |
107 | } | |
108 | ||
a8c0ddb5 AN |
109 | u8 wl1271_tx_get_hlid(struct sk_buff *skb) |
110 | { | |
111 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
112 | ||
113 | if (control->control.sta) { | |
114 | struct wl1271_station *wl_sta; | |
115 | ||
116 | wl_sta = (struct wl1271_station *) | |
117 | control->control.sta->drv_priv; | |
118 | return wl_sta->hlid; | |
119 | } else { | |
120 | struct ieee80211_hdr *hdr; | |
121 | ||
122 | hdr = (struct ieee80211_hdr *)skb->data; | |
123 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
124 | return WL1271_AP_GLOBAL_HLID; | |
125 | else | |
126 | return WL1271_AP_BROADCAST_HLID; | |
127 | } | |
128 | } | |
129 | ||
a19606b4 | 130 | static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra, |
09039f42 | 131 | u32 buf_offset, u8 hlid) |
f5fc0f86 LC |
132 | { |
133 | struct wl1271_tx_hw_descr *desc; | |
134 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 135 | u32 len; |
5c9417f1 | 136 | u32 total_blocks; |
f5fc0f86 LC |
137 | int id, ret = -EBUSY; |
138 | ||
a19606b4 | 139 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 140 | return -EAGAIN; |
a19606b4 | 141 | |
f5fc0f86 | 142 | /* allocate free identifier for the packet */ |
25eeb9e3 | 143 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
144 | if (id < 0) |
145 | return id; | |
146 | ||
147 | /* approximate the number of blocks required for this packet | |
148 | in the firmware */ | |
48a61477 SL |
149 | if (wl->block_size) |
150 | len = ALIGN(total_len, wl->block_size); | |
151 | else | |
152 | len = total_len; | |
153 | ||
154 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + | |
155 | TX_HW_BLOCK_SPARE; | |
156 | ||
f5fc0f86 LC |
157 | if (total_blocks <= wl->tx_blocks_available) { |
158 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
159 | skb, total_len - skb->len); | |
160 | ||
ae77eccf SL |
161 | /* HW descriptor fields change between wl127x and wl128x */ |
162 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
163 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
164 | } else { | |
165 | desc->wl127x_mem.extra_blocks = TX_HW_BLOCK_SPARE; | |
166 | desc->wl127x_mem.total_mem_blocks = total_blocks; | |
167 | } | |
168 | ||
f5fc0f86 LC |
169 | desc->id = id; |
170 | ||
171 | wl->tx_blocks_available -= total_blocks; | |
172 | ||
09039f42 AN |
173 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
174 | wl->links[hlid].allocated_blks += total_blocks; | |
175 | ||
f5fc0f86 LC |
176 | ret = 0; |
177 | ||
178 | wl1271_debug(DEBUG_TX, | |
179 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
180 | total_len, total_blocks, id); | |
781608c4 | 181 | } else { |
25eeb9e3 | 182 | wl1271_free_tx_id(wl, id); |
781608c4 | 183 | } |
f5fc0f86 LC |
184 | |
185 | return ret; | |
186 | } | |
187 | ||
a19606b4 | 188 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb, |
09039f42 AN |
189 | u32 extra, struct ieee80211_tx_info *control, |
190 | u8 hlid) | |
f5fc0f86 | 191 | { |
ac5e1e39 | 192 | struct timespec ts; |
f5fc0f86 | 193 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 194 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 195 | s64 hosttime; |
d0f63b20 | 196 | u16 tx_attr; |
f5fc0f86 LC |
197 | |
198 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
199 | ||
1e2b7976 JO |
200 | /* relocate space for security header */ |
201 | if (extra) { | |
202 | void *framestart = skb->data + sizeof(*desc); | |
203 | u16 fc = *(u16 *)(framestart + extra); | |
d0f63b20 | 204 | int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc)); |
1e2b7976 JO |
205 | memmove(framestart, framestart + extra, hdrlen); |
206 | } | |
207 | ||
f5fc0f86 | 208 | /* configure packet life time */ |
ac5e1e39 JO |
209 | getnstimeofday(&ts); |
210 | hosttime = (timespec_to_ns(&ts) >> 10); | |
211 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d AN |
212 | |
213 | if (wl->bss_type != BSS_TYPE_AP_BSS) | |
214 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); | |
215 | else | |
216 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 LC |
217 | |
218 | /* configure the tx attributes */ | |
d0f63b20 | 219 | tx_attr = wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER; |
c6999d83 | 220 | |
ed484a16 | 221 | /* queue (we use same identifiers for tid's and ac's */ |
c6999d83 | 222 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
ed484a16 | 223 | desc->tid = ac; |
c6c8a65d AN |
224 | |
225 | if (wl->bss_type != BSS_TYPE_AP_BSS) { | |
09039f42 | 226 | desc->aid = hlid; |
c6c8a65d AN |
227 | |
228 | /* if the packets are destined for AP (have a STA entry) | |
229 | send them with AP rate policies, otherwise use default | |
230 | basic rates */ | |
231 | if (control->control.sta) | |
232 | rate_idx = ACX_TX_AP_FULL_RATE; | |
233 | else | |
234 | rate_idx = ACX_TX_BASIC_RATE; | |
235 | } else { | |
09039f42 AN |
236 | desc->hlid = hlid; |
237 | switch (hlid) { | |
238 | case WL1271_AP_GLOBAL_HLID: | |
239 | rate_idx = ACX_TX_AP_MODE_MGMT_RATE; | |
240 | break; | |
241 | case WL1271_AP_BROADCAST_HLID: | |
242 | rate_idx = ACX_TX_AP_MODE_BCST_RATE; | |
243 | break; | |
244 | default: | |
c6c8a65d | 245 | rate_idx = ac; |
09039f42 | 246 | break; |
c6c8a65d AN |
247 | } |
248 | } | |
249 | ||
250 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
251 | desc->reserved = 0; |
252 | ||
48a61477 SL |
253 | if (wl->block_size) { |
254 | aligned_len = ALIGN(skb->len, wl->block_size); | |
255 | ||
256 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; | |
257 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
258 | |
259 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
260 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
261 | desc->hlid, tx_attr, | |
262 | le16_to_cpu(desc->length), | |
263 | le16_to_cpu(desc->life_time), | |
264 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
265 | } else { |
266 | int pad; | |
267 | ||
268 | /* align the length (and store in terms of words) */ | |
269 | aligned_len = ALIGN(skb->len, WL1271_TX_ALIGN_TO); | |
270 | desc->length = cpu_to_le16(aligned_len >> 2); | |
271 | ||
272 | /* calculate number of padding bytes */ | |
273 | pad = aligned_len - skb->len; | |
274 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 275 | |
ae77eccf SL |
276 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
277 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
278 | desc->hlid, tx_attr, | |
279 | le16_to_cpu(desc->length), | |
280 | le16_to_cpu(desc->life_time), | |
281 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 282 | } |
d0f63b20 LC |
283 | |
284 | desc->tx_attr = cpu_to_le16(tx_attr); | |
f5fc0f86 LC |
285 | } |
286 | ||
287 | /* caller must hold wl->mutex */ | |
a19606b4 IY |
288 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb, |
289 | u32 buf_offset) | |
f5fc0f86 LC |
290 | { |
291 | struct ieee80211_tx_info *info; | |
292 | u32 extra = 0; | |
293 | int ret = 0; | |
a19606b4 | 294 | u32 total_len; |
09039f42 | 295 | u8 hlid; |
f5fc0f86 LC |
296 | |
297 | if (!skb) | |
298 | return -EINVAL; | |
299 | ||
300 | info = IEEE80211_SKB_CB(skb); | |
301 | ||
302 | if (info->control.hw_key && | |
97359d12 | 303 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
304 | extra = WL1271_TKIP_IV_SPACE; |
305 | ||
306 | if (info->control.hw_key) { | |
7f179b46 AN |
307 | bool is_wep; |
308 | u8 idx = info->control.hw_key->hw_key_idx; | |
309 | u32 cipher = info->control.hw_key->cipher; | |
310 | ||
311 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
312 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 313 | |
7f179b46 AN |
314 | if (unlikely(is_wep && wl->default_key != idx)) { |
315 | ret = wl1271_set_default_wep_key(wl, idx); | |
f5fc0f86 LC |
316 | if (ret < 0) |
317 | return ret; | |
ee444cf0 | 318 | wl->default_key = idx; |
f5fc0f86 LC |
319 | } |
320 | } | |
321 | ||
09039f42 AN |
322 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
323 | hlid = wl1271_tx_get_hlid(skb); | |
324 | else | |
325 | hlid = TX_HW_DEFAULT_AID; | |
326 | ||
327 | ret = wl1271_tx_allocate(wl, skb, extra, buf_offset, hlid); | |
f5fc0f86 LC |
328 | if (ret < 0) |
329 | return ret; | |
330 | ||
b622d992 | 331 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 332 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
b622d992 AN |
333 | wl1271_tx_regulate_link(wl, hlid); |
334 | } | |
99a2775d | 335 | |
09039f42 | 336 | wl1271_tx_fill_hdr(wl, skb, extra, info, hlid); |
f5fc0f86 | 337 | |
a19606b4 | 338 | /* |
48a61477 SL |
339 | * The length of each packet is stored in terms of |
340 | * words. Thus, we must pad the skb data to make sure its | |
341 | * length is aligned. The number of padding bytes is computed | |
342 | * and set in wl1271_tx_fill_hdr. | |
343 | * In special cases, we want to align to a specific block size | |
344 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 345 | */ |
48a61477 SL |
346 | if (wl->block_size) |
347 | total_len = ALIGN(skb->len, wl->block_size); | |
348 | else | |
349 | total_len = ALIGN(skb->len, WL1271_TX_ALIGN_TO); | |
350 | ||
a19606b4 IY |
351 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
352 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 353 | |
a19606b4 | 354 | return total_len; |
f5fc0f86 LC |
355 | } |
356 | ||
ebba60c6 | 357 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set) |
830fb67b JO |
358 | { |
359 | struct ieee80211_supported_band *band; | |
360 | u32 enabled_rates = 0; | |
361 | int bit; | |
362 | ||
363 | band = wl->hw->wiphy->bands[wl->band]; | |
364 | for (bit = 0; bit < band->n_bitrates; bit++) { | |
365 | if (rate_set & 0x1) | |
366 | enabled_rates |= band->bitrates[bit].hw_value; | |
367 | rate_set >>= 1; | |
368 | } | |
369 | ||
00d20100 | 370 | #ifdef CONFIG_WL12XX_HT |
18357850 SL |
371 | /* MCS rates indication are on bits 16 - 23 */ |
372 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
373 | ||
374 | for (bit = 0; bit < 8; bit++) { | |
375 | if (rate_set & 0x1) | |
376 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
377 | rate_set >>= 1; | |
378 | } | |
379 | #endif | |
380 | ||
830fb67b JO |
381 | return enabled_rates; |
382 | } | |
383 | ||
a8c0ddb5 | 384 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
385 | { |
386 | unsigned long flags; | |
387 | ||
388 | if (test_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags) && | |
6742f554 | 389 | wl->tx_queue_count <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
2fe33e8c IY |
390 | /* firmware buffer has space, restart queues */ |
391 | spin_lock_irqsave(&wl->wl_lock, flags); | |
392 | ieee80211_wake_queues(wl->hw); | |
393 | clear_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags); | |
394 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
395 | } | |
396 | } | |
397 | ||
a8c0ddb5 | 398 | static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl) |
6742f554 JO |
399 | { |
400 | struct sk_buff *skb = NULL; | |
401 | unsigned long flags; | |
402 | ||
403 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VO]); | |
404 | if (skb) | |
405 | goto out; | |
406 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VI]); | |
407 | if (skb) | |
408 | goto out; | |
409 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BE]); | |
410 | if (skb) | |
411 | goto out; | |
412 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BK]); | |
413 | ||
414 | out: | |
415 | if (skb) { | |
416 | spin_lock_irqsave(&wl->wl_lock, flags); | |
417 | wl->tx_queue_count--; | |
418 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
419 | } | |
420 | ||
421 | return skb; | |
422 | } | |
423 | ||
a8c0ddb5 AN |
424 | static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl) |
425 | { | |
426 | struct sk_buff *skb = NULL; | |
427 | unsigned long flags; | |
428 | int i, h, start_hlid; | |
429 | ||
430 | /* start from the link after the last one */ | |
431 | start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS; | |
432 | ||
433 | /* dequeue according to AC, round robin on each link */ | |
434 | for (i = 0; i < AP_MAX_LINKS; i++) { | |
435 | h = (start_hlid + i) % AP_MAX_LINKS; | |
436 | ||
437 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VO]); | |
438 | if (skb) | |
439 | goto out; | |
440 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VI]); | |
441 | if (skb) | |
442 | goto out; | |
443 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BE]); | |
444 | if (skb) | |
445 | goto out; | |
446 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BK]); | |
447 | if (skb) | |
448 | goto out; | |
449 | } | |
450 | ||
451 | out: | |
452 | if (skb) { | |
453 | wl->last_tx_hlid = h; | |
454 | spin_lock_irqsave(&wl->wl_lock, flags); | |
455 | wl->tx_queue_count--; | |
456 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
457 | } else { | |
458 | wl->last_tx_hlid = 0; | |
459 | } | |
460 | ||
461 | return skb; | |
462 | } | |
463 | ||
464 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) | |
465 | { | |
466 | if (wl->bss_type == BSS_TYPE_AP_BSS) | |
467 | return wl1271_ap_skb_dequeue(wl); | |
468 | ||
469 | return wl1271_sta_skb_dequeue(wl); | |
470 | } | |
471 | ||
6742f554 JO |
472 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb) |
473 | { | |
474 | unsigned long flags; | |
475 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
476 | ||
a8c0ddb5 AN |
477 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
478 | u8 hlid = wl1271_tx_get_hlid(skb); | |
479 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); | |
480 | ||
481 | /* make sure we dequeue the same packet next time */ | |
482 | wl->last_tx_hlid = (hlid + AP_MAX_LINKS - 1) % AP_MAX_LINKS; | |
483 | } else { | |
484 | skb_queue_head(&wl->tx_queue[q], skb); | |
485 | } | |
486 | ||
6742f554 JO |
487 | spin_lock_irqsave(&wl->wl_lock, flags); |
488 | wl->tx_queue_count++; | |
489 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
490 | } | |
491 | ||
a522550a | 492 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 493 | { |
f5fc0f86 LC |
494 | struct sk_buff *skb; |
495 | bool woken_up = false; | |
6c6e669e IY |
496 | u32 buf_offset = 0; |
497 | bool sent_packets = false; | |
f5fc0f86 LC |
498 | int ret; |
499 | ||
f5fc0f86 LC |
500 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
501 | goto out; | |
502 | ||
6742f554 | 503 | while ((skb = wl1271_skb_dequeue(wl))) { |
f5fc0f86 | 504 | if (!woken_up) { |
a620865e | 505 | ret = wl1271_ps_elp_wakeup(wl); |
f5fc0f86 | 506 | if (ret < 0) |
ffb591cd | 507 | goto out_ack; |
f5fc0f86 LC |
508 | woken_up = true; |
509 | } | |
510 | ||
a19606b4 | 511 | ret = wl1271_prepare_tx_frame(wl, skb, buf_offset); |
6c6e669e | 512 | if (ret == -EAGAIN) { |
a19606b4 | 513 | /* |
6c6e669e IY |
514 | * Aggregation buffer is full. |
515 | * Flush buffer and try again. | |
516 | */ | |
6742f554 | 517 | wl1271_skb_queue_head(wl, skb); |
6c6e669e | 518 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 519 | buf_offset, true); |
6c6e669e IY |
520 | sent_packets = true; |
521 | buf_offset = 0; | |
522 | continue; | |
523 | } else if (ret == -EBUSY) { | |
524 | /* | |
525 | * Firmware buffer is full. | |
a19606b4 IY |
526 | * Queue back last skb, and stop aggregating. |
527 | */ | |
6742f554 | 528 | wl1271_skb_queue_head(wl, skb); |
a522550a IY |
529 | /* No work left, avoid scheduling redundant tx work */ |
530 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 531 | goto out_ack; |
f5fc0f86 LC |
532 | } else if (ret < 0) { |
533 | dev_kfree_skb(skb); | |
ffb591cd | 534 | goto out_ack; |
f5fc0f86 | 535 | } |
a19606b4 IY |
536 | buf_offset += ret; |
537 | wl->tx_packets_count++; | |
f5fc0f86 LC |
538 | } |
539 | ||
ffb591cd | 540 | out_ack: |
a19606b4 IY |
541 | if (buf_offset) { |
542 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
543 | buf_offset, true); | |
6c6e669e IY |
544 | sent_packets = true; |
545 | } | |
546 | if (sent_packets) { | |
606ea9fa IY |
547 | /* |
548 | * Interrupt the firmware with the new packets. This is only | |
549 | * required for older hardware revisions | |
550 | */ | |
551 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
552 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
553 | wl->tx_packets_count); | |
554 | ||
a8c0ddb5 | 555 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 556 | } |
ffb591cd | 557 | |
f5fc0f86 LC |
558 | out: |
559 | if (woken_up) | |
560 | wl1271_ps_elp_sleep(wl); | |
a522550a | 561 | } |
f5fc0f86 | 562 | |
a522550a IY |
563 | void wl1271_tx_work(struct work_struct *work) |
564 | { | |
565 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
566 | ||
567 | mutex_lock(&wl->mutex); | |
568 | wl1271_tx_work_locked(wl); | |
f5fc0f86 LC |
569 | mutex_unlock(&wl->mutex); |
570 | } | |
571 | ||
572 | static void wl1271_tx_complete_packet(struct wl1271 *wl, | |
573 | struct wl1271_tx_hw_res_descr *result) | |
574 | { | |
f5fc0f86 LC |
575 | struct ieee80211_tx_info *info; |
576 | struct sk_buff *skb; | |
f5fc0f86 | 577 | int id = result->id; |
31627dc5 JO |
578 | int rate = -1; |
579 | u8 retries = 0; | |
f5fc0f86 LC |
580 | |
581 | /* check for id legality */ | |
ffb591cd | 582 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
583 | wl1271_warning("TX result illegal id: %d", id); |
584 | return; | |
585 | } | |
586 | ||
587 | skb = wl->tx_frames[id]; | |
588 | info = IEEE80211_SKB_CB(skb); | |
589 | ||
31627dc5 JO |
590 | /* update the TX status info */ |
591 | if (result->status == TX_SUCCESS) { | |
592 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 593 | info->flags |= IEEE80211_TX_STAT_ACK; |
6a2de93b | 594 | rate = wl1271_rate_to_idx(result->rate_class_index, wl->band); |
31627dc5 JO |
595 | retries = result->ack_failures; |
596 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
597 | wl->stats.excessive_retries++; | |
598 | retries = result->ack_failures; | |
f5fc0f86 LC |
599 | } |
600 | ||
31627dc5 JO |
601 | info->status.rates[0].idx = rate; |
602 | info->status.rates[0].count = retries; | |
603 | info->status.rates[0].flags = 0; | |
604 | info->status.ack_signal = -1; | |
605 | ||
f5fc0f86 LC |
606 | wl->stats.retry_count += result->ack_failures; |
607 | ||
ac4e4ce5 | 608 | /* update security sequence number */ |
04e36fc5 JO |
609 | wl->tx_security_seq += (result->lsb_security_sequence_number - |
610 | wl->tx_security_last_seq); | |
ac4e4ce5 JO |
611 | wl->tx_security_last_seq = result->lsb_security_sequence_number; |
612 | ||
1e2b7976 JO |
613 | /* remove private header from packet */ |
614 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
615 | ||
616 | /* remove TKIP header space if present */ | |
f5fc0f86 | 617 | if (info->control.hw_key && |
97359d12 | 618 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
619 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
620 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
621 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
622 | } | |
f5fc0f86 LC |
623 | |
624 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
625 | " status 0x%x", | |
626 | result->id, skb, result->ack_failures, | |
627 | result->rate_class_index, result->status); | |
628 | ||
f5fc0f86 | 629 | /* return the packet to the stack */ |
a620865e IY |
630 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
631 | ieee80211_queue_work(wl->hw, &wl->netstack_work); | |
25eeb9e3 | 632 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
633 | } |
634 | ||
635 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 636 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
637 | { |
638 | struct wl1271_acx_mem_map *memmap = | |
639 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 640 | u32 count, fw_counter; |
f5fc0f86 LC |
641 | u32 i; |
642 | ||
f5fc0f86 | 643 | /* read the tx results from the chipset */ |
7b048c52 TP |
644 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
645 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
646 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
647 | ||
648 | /* write host counter to chipset (to ack) */ | |
649 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
650 | offsetof(struct wl1271_tx_hw_res_if, | |
651 | tx_result_host_counter), fw_counter); | |
652 | ||
653 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 654 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
655 | |
656 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 657 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 658 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
659 | |
660 | /* process the results */ | |
661 | for (i = 0; i < count; i++) { | |
662 | struct wl1271_tx_hw_res_descr *result; | |
663 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
664 | ||
665 | /* process the packet */ | |
666 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
667 | wl1271_tx_complete_packet(wl, result); | |
668 | ||
669 | wl->tx_results_count++; | |
670 | } | |
f5fc0f86 LC |
671 | } |
672 | ||
a8c0ddb5 AN |
673 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
674 | { | |
675 | struct sk_buff *skb; | |
676 | int i, total = 0; | |
677 | unsigned long flags; | |
1d36cd89 | 678 | struct ieee80211_tx_info *info; |
a8c0ddb5 AN |
679 | |
680 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
681 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { | |
682 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
1d36cd89 AN |
683 | info = IEEE80211_SKB_CB(skb); |
684 | info->status.rates[0].idx = -1; | |
685 | info->status.rates[0].count = 0; | |
a8c0ddb5 AN |
686 | ieee80211_tx_status(wl->hw, skb); |
687 | total++; | |
688 | } | |
689 | } | |
690 | ||
691 | spin_lock_irqsave(&wl->wl_lock, flags); | |
692 | wl->tx_queue_count -= total; | |
693 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
694 | ||
695 | wl1271_handle_tx_low_watermark(wl); | |
696 | } | |
697 | ||
f5fc0f86 | 698 | /* caller must hold wl->mutex */ |
781608c4 | 699 | void wl1271_tx_reset(struct wl1271 *wl) |
f5fc0f86 LC |
700 | { |
701 | int i; | |
702 | struct sk_buff *skb; | |
1d36cd89 | 703 | struct ieee80211_tx_info *info; |
f5fc0f86 LC |
704 | |
705 | /* TX failure */ | |
a8c0ddb5 | 706 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
09039f42 | 707 | for (i = 0; i < AP_MAX_LINKS; i++) { |
a8c0ddb5 | 708 | wl1271_tx_reset_link_queues(wl, i); |
09039f42 AN |
709 | wl->links[i].allocated_blks = 0; |
710 | wl->links[i].prev_freed_blks = 0; | |
711 | } | |
a8c0ddb5 AN |
712 | |
713 | wl->last_tx_hlid = 0; | |
714 | } else { | |
715 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
716 | while ((skb = skb_dequeue(&wl->tx_queue[i]))) { | |
717 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", | |
718 | skb); | |
1d36cd89 AN |
719 | info = IEEE80211_SKB_CB(skb); |
720 | info->status.rates[0].idx = -1; | |
721 | info->status.rates[0].count = 0; | |
a8c0ddb5 AN |
722 | ieee80211_tx_status(wl->hw, skb); |
723 | } | |
6742f554 | 724 | } |
f5fc0f86 | 725 | } |
a8c0ddb5 | 726 | |
6742f554 | 727 | wl->tx_queue_count = 0; |
f5fc0f86 | 728 | |
2fe33e8c IY |
729 | /* |
730 | * Make sure the driver is at a consistent state, in case this | |
731 | * function is called from a context other than interface removal. | |
732 | */ | |
a8c0ddb5 | 733 | wl1271_handle_tx_low_watermark(wl); |
2fe33e8c | 734 | |
50e9f746 IY |
735 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
736 | if (wl->tx_frames[i] == NULL) | |
737 | continue; | |
738 | ||
739 | skb = wl->tx_frames[i]; | |
740 | wl1271_free_tx_id(wl, i); | |
741 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
742 | ||
743 | /* Remove private headers before passing the skb to mac80211 */ | |
744 | info = IEEE80211_SKB_CB(skb); | |
745 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
746 | if (info->control.hw_key && | |
747 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
748 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
749 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, | |
750 | hdrlen); | |
751 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
f5fc0f86 | 752 | } |
50e9f746 IY |
753 | |
754 | info->status.rates[0].idx = -1; | |
755 | info->status.rates[0].count = 0; | |
756 | ||
757 | ieee80211_tx_status(wl->hw, skb); | |
758 | } | |
781608c4 JO |
759 | } |
760 | ||
761 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
762 | ||
763 | /* caller must *NOT* hold wl->mutex */ | |
764 | void wl1271_tx_flush(struct wl1271 *wl) | |
765 | { | |
766 | unsigned long timeout; | |
767 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
768 | ||
769 | while (!time_after(jiffies, timeout)) { | |
770 | mutex_lock(&wl->mutex); | |
a8c0ddb5 AN |
771 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
772 | wl->tx_frames_cnt, wl->tx_queue_count); | |
6742f554 | 773 | if ((wl->tx_frames_cnt == 0) && (wl->tx_queue_count == 0)) { |
781608c4 JO |
774 | mutex_unlock(&wl->mutex); |
775 | return; | |
776 | } | |
777 | mutex_unlock(&wl->mutex); | |
778 | msleep(1); | |
779 | } | |
780 | ||
781 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 782 | } |
e0fe371b AN |
783 | |
784 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl) | |
785 | { | |
786 | int i; | |
787 | u32 rate = 0; | |
788 | ||
789 | if (!wl->basic_rate_set) { | |
790 | WARN_ON(1); | |
791 | wl->basic_rate_set = wl->conf.tx.basic_rate; | |
792 | } | |
793 | ||
794 | for (i = 0; !rate; i++) { | |
795 | if ((wl->basic_rate_set >> i) & 0x1) | |
796 | rate = 1 << i; | |
797 | } | |
798 | ||
799 | return rate; | |
800 | } |