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; | |
5c9417f1 | 135 | u32 total_blocks; |
f5fc0f86 LC |
136 | int id, ret = -EBUSY; |
137 | ||
a19606b4 | 138 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 139 | return -EAGAIN; |
a19606b4 | 140 | |
f5fc0f86 | 141 | /* allocate free identifier for the packet */ |
25eeb9e3 | 142 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
143 | if (id < 0) |
144 | return id; | |
145 | ||
146 | /* approximate the number of blocks required for this packet | |
147 | in the firmware */ | |
5c9417f1 JO |
148 | total_blocks = total_len + TX_HW_BLOCK_SIZE - 1; |
149 | total_blocks = total_blocks / TX_HW_BLOCK_SIZE + TX_HW_BLOCK_SPARE; | |
f5fc0f86 LC |
150 | if (total_blocks <= wl->tx_blocks_available) { |
151 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
152 | skb, total_len - skb->len); | |
153 | ||
154 | desc->extra_mem_blocks = TX_HW_BLOCK_SPARE; | |
155 | desc->total_mem_blocks = total_blocks; | |
156 | desc->id = id; | |
157 | ||
158 | wl->tx_blocks_available -= total_blocks; | |
159 | ||
09039f42 AN |
160 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
161 | wl->links[hlid].allocated_blks += total_blocks; | |
162 | ||
f5fc0f86 LC |
163 | ret = 0; |
164 | ||
165 | wl1271_debug(DEBUG_TX, | |
166 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
167 | total_len, total_blocks, id); | |
781608c4 | 168 | } else { |
25eeb9e3 | 169 | wl1271_free_tx_id(wl, id); |
781608c4 | 170 | } |
f5fc0f86 LC |
171 | |
172 | return ret; | |
173 | } | |
174 | ||
a19606b4 | 175 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb, |
09039f42 AN |
176 | u32 extra, struct ieee80211_tx_info *control, |
177 | u8 hlid) | |
f5fc0f86 | 178 | { |
ac5e1e39 | 179 | struct timespec ts; |
f5fc0f86 | 180 | struct wl1271_tx_hw_descr *desc; |
c6c8a65d | 181 | int pad, ac, rate_idx; |
ac5e1e39 | 182 | s64 hosttime; |
d0f63b20 | 183 | u16 tx_attr; |
f5fc0f86 LC |
184 | |
185 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
186 | ||
1e2b7976 JO |
187 | /* relocate space for security header */ |
188 | if (extra) { | |
189 | void *framestart = skb->data + sizeof(*desc); | |
190 | u16 fc = *(u16 *)(framestart + extra); | |
d0f63b20 | 191 | int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc)); |
1e2b7976 JO |
192 | memmove(framestart, framestart + extra, hdrlen); |
193 | } | |
194 | ||
f5fc0f86 | 195 | /* configure packet life time */ |
ac5e1e39 JO |
196 | getnstimeofday(&ts); |
197 | hosttime = (timespec_to_ns(&ts) >> 10); | |
198 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d AN |
199 | |
200 | if (wl->bss_type != BSS_TYPE_AP_BSS) | |
201 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); | |
202 | else | |
203 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 LC |
204 | |
205 | /* configure the tx attributes */ | |
d0f63b20 | 206 | tx_attr = wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER; |
c6999d83 | 207 | |
ed484a16 | 208 | /* queue (we use same identifiers for tid's and ac's */ |
c6999d83 | 209 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
ed484a16 | 210 | desc->tid = ac; |
c6c8a65d AN |
211 | |
212 | if (wl->bss_type != BSS_TYPE_AP_BSS) { | |
09039f42 | 213 | desc->aid = hlid; |
c6c8a65d AN |
214 | |
215 | /* if the packets are destined for AP (have a STA entry) | |
216 | send them with AP rate policies, otherwise use default | |
217 | basic rates */ | |
218 | if (control->control.sta) | |
219 | rate_idx = ACX_TX_AP_FULL_RATE; | |
220 | else | |
221 | rate_idx = ACX_TX_BASIC_RATE; | |
222 | } else { | |
09039f42 AN |
223 | desc->hlid = hlid; |
224 | switch (hlid) { | |
225 | case WL1271_AP_GLOBAL_HLID: | |
226 | rate_idx = ACX_TX_AP_MODE_MGMT_RATE; | |
227 | break; | |
228 | case WL1271_AP_BROADCAST_HLID: | |
229 | rate_idx = ACX_TX_AP_MODE_BCST_RATE; | |
230 | break; | |
231 | default: | |
c6c8a65d | 232 | rate_idx = ac; |
09039f42 | 233 | break; |
c6c8a65d AN |
234 | } |
235 | } | |
236 | ||
237 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
238 | desc->reserved = 0; |
239 | ||
240 | /* align the length (and store in terms of words) */ | |
02ad2d90 | 241 | pad = ALIGN(skb->len, WL1271_TX_ALIGN_TO); |
d0f63b20 | 242 | desc->length = cpu_to_le16(pad >> 2); |
f5fc0f86 LC |
243 | |
244 | /* calculate number of padding bytes */ | |
245 | pad = pad - skb->len; | |
d0f63b20 LC |
246 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; |
247 | ||
248 | desc->tx_attr = cpu_to_le16(tx_attr); | |
f5fc0f86 | 249 | |
c6c8a65d | 250 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
1d4801f2 EP |
251 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, desc->hlid, |
252 | le16_to_cpu(desc->tx_attr), le16_to_cpu(desc->length), | |
253 | le16_to_cpu(desc->life_time), desc->total_mem_blocks); | |
f5fc0f86 LC |
254 | } |
255 | ||
256 | /* caller must hold wl->mutex */ | |
a19606b4 IY |
257 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb, |
258 | u32 buf_offset) | |
f5fc0f86 LC |
259 | { |
260 | struct ieee80211_tx_info *info; | |
261 | u32 extra = 0; | |
262 | int ret = 0; | |
a19606b4 | 263 | u32 total_len; |
09039f42 | 264 | u8 hlid; |
f5fc0f86 LC |
265 | |
266 | if (!skb) | |
267 | return -EINVAL; | |
268 | ||
269 | info = IEEE80211_SKB_CB(skb); | |
270 | ||
271 | if (info->control.hw_key && | |
97359d12 | 272 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
273 | extra = WL1271_TKIP_IV_SPACE; |
274 | ||
275 | if (info->control.hw_key) { | |
7f179b46 AN |
276 | bool is_wep; |
277 | u8 idx = info->control.hw_key->hw_key_idx; | |
278 | u32 cipher = info->control.hw_key->cipher; | |
279 | ||
280 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
281 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 282 | |
7f179b46 AN |
283 | if (unlikely(is_wep && wl->default_key != idx)) { |
284 | ret = wl1271_set_default_wep_key(wl, idx); | |
f5fc0f86 LC |
285 | if (ret < 0) |
286 | return ret; | |
ee444cf0 | 287 | wl->default_key = idx; |
f5fc0f86 LC |
288 | } |
289 | } | |
290 | ||
09039f42 AN |
291 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
292 | hlid = wl1271_tx_get_hlid(skb); | |
293 | else | |
294 | hlid = TX_HW_DEFAULT_AID; | |
295 | ||
296 | ret = wl1271_tx_allocate(wl, skb, extra, buf_offset, hlid); | |
f5fc0f86 LC |
297 | if (ret < 0) |
298 | return ret; | |
299 | ||
b622d992 | 300 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 301 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
b622d992 AN |
302 | wl1271_tx_regulate_link(wl, hlid); |
303 | } | |
99a2775d | 304 | |
09039f42 | 305 | wl1271_tx_fill_hdr(wl, skb, extra, info, hlid); |
f5fc0f86 | 306 | |
a19606b4 IY |
307 | /* |
308 | * The length of each packet is stored in terms of words. Thus, we must | |
309 | * pad the skb data to make sure its length is aligned. | |
310 | * The number of padding bytes is computed and set in wl1271_tx_fill_hdr | |
311 | */ | |
02ad2d90 | 312 | total_len = ALIGN(skb->len, WL1271_TX_ALIGN_TO); |
a19606b4 IY |
313 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
314 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 315 | |
a19606b4 | 316 | return total_len; |
f5fc0f86 LC |
317 | } |
318 | ||
ebba60c6 | 319 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set) |
830fb67b JO |
320 | { |
321 | struct ieee80211_supported_band *band; | |
322 | u32 enabled_rates = 0; | |
323 | int bit; | |
324 | ||
325 | band = wl->hw->wiphy->bands[wl->band]; | |
326 | for (bit = 0; bit < band->n_bitrates; bit++) { | |
327 | if (rate_set & 0x1) | |
328 | enabled_rates |= band->bitrates[bit].hw_value; | |
329 | rate_set >>= 1; | |
330 | } | |
331 | ||
00d20100 | 332 | #ifdef CONFIG_WL12XX_HT |
18357850 SL |
333 | /* MCS rates indication are on bits 16 - 23 */ |
334 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
335 | ||
336 | for (bit = 0; bit < 8; bit++) { | |
337 | if (rate_set & 0x1) | |
338 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
339 | rate_set >>= 1; | |
340 | } | |
341 | #endif | |
342 | ||
830fb67b JO |
343 | return enabled_rates; |
344 | } | |
345 | ||
a8c0ddb5 | 346 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
347 | { |
348 | unsigned long flags; | |
349 | ||
350 | if (test_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags) && | |
6742f554 | 351 | wl->tx_queue_count <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
2fe33e8c IY |
352 | /* firmware buffer has space, restart queues */ |
353 | spin_lock_irqsave(&wl->wl_lock, flags); | |
354 | ieee80211_wake_queues(wl->hw); | |
355 | clear_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags); | |
356 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
357 | } | |
358 | } | |
359 | ||
a8c0ddb5 | 360 | static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl) |
6742f554 JO |
361 | { |
362 | struct sk_buff *skb = NULL; | |
363 | unsigned long flags; | |
364 | ||
365 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VO]); | |
366 | if (skb) | |
367 | goto out; | |
368 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VI]); | |
369 | if (skb) | |
370 | goto out; | |
371 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BE]); | |
372 | if (skb) | |
373 | goto out; | |
374 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BK]); | |
375 | ||
376 | out: | |
377 | if (skb) { | |
378 | spin_lock_irqsave(&wl->wl_lock, flags); | |
379 | wl->tx_queue_count--; | |
380 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
381 | } | |
382 | ||
383 | return skb; | |
384 | } | |
385 | ||
a8c0ddb5 AN |
386 | static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl) |
387 | { | |
388 | struct sk_buff *skb = NULL; | |
389 | unsigned long flags; | |
390 | int i, h, start_hlid; | |
391 | ||
392 | /* start from the link after the last one */ | |
393 | start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS; | |
394 | ||
395 | /* dequeue according to AC, round robin on each link */ | |
396 | for (i = 0; i < AP_MAX_LINKS; i++) { | |
397 | h = (start_hlid + i) % AP_MAX_LINKS; | |
398 | ||
399 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VO]); | |
400 | if (skb) | |
401 | goto out; | |
402 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VI]); | |
403 | if (skb) | |
404 | goto out; | |
405 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BE]); | |
406 | if (skb) | |
407 | goto out; | |
408 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BK]); | |
409 | if (skb) | |
410 | goto out; | |
411 | } | |
412 | ||
413 | out: | |
414 | if (skb) { | |
415 | wl->last_tx_hlid = h; | |
416 | spin_lock_irqsave(&wl->wl_lock, flags); | |
417 | wl->tx_queue_count--; | |
418 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
419 | } else { | |
420 | wl->last_tx_hlid = 0; | |
421 | } | |
422 | ||
423 | return skb; | |
424 | } | |
425 | ||
426 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) | |
427 | { | |
428 | if (wl->bss_type == BSS_TYPE_AP_BSS) | |
429 | return wl1271_ap_skb_dequeue(wl); | |
430 | ||
431 | return wl1271_sta_skb_dequeue(wl); | |
432 | } | |
433 | ||
6742f554 JO |
434 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb) |
435 | { | |
436 | unsigned long flags; | |
437 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
438 | ||
a8c0ddb5 AN |
439 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
440 | u8 hlid = wl1271_tx_get_hlid(skb); | |
441 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); | |
442 | ||
443 | /* make sure we dequeue the same packet next time */ | |
444 | wl->last_tx_hlid = (hlid + AP_MAX_LINKS - 1) % AP_MAX_LINKS; | |
445 | } else { | |
446 | skb_queue_head(&wl->tx_queue[q], skb); | |
447 | } | |
448 | ||
6742f554 JO |
449 | spin_lock_irqsave(&wl->wl_lock, flags); |
450 | wl->tx_queue_count++; | |
451 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
452 | } | |
453 | ||
a522550a | 454 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 455 | { |
f5fc0f86 LC |
456 | struct sk_buff *skb; |
457 | bool woken_up = false; | |
6c6e669e IY |
458 | u32 buf_offset = 0; |
459 | bool sent_packets = false; | |
f5fc0f86 LC |
460 | int ret; |
461 | ||
f5fc0f86 LC |
462 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
463 | goto out; | |
464 | ||
6742f554 | 465 | while ((skb = wl1271_skb_dequeue(wl))) { |
f5fc0f86 | 466 | if (!woken_up) { |
a620865e | 467 | ret = wl1271_ps_elp_wakeup(wl); |
f5fc0f86 | 468 | if (ret < 0) |
ffb591cd | 469 | goto out_ack; |
f5fc0f86 LC |
470 | woken_up = true; |
471 | } | |
472 | ||
a19606b4 | 473 | ret = wl1271_prepare_tx_frame(wl, skb, buf_offset); |
6c6e669e | 474 | if (ret == -EAGAIN) { |
a19606b4 | 475 | /* |
6c6e669e IY |
476 | * Aggregation buffer is full. |
477 | * Flush buffer and try again. | |
478 | */ | |
6742f554 | 479 | wl1271_skb_queue_head(wl, skb); |
6c6e669e | 480 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 481 | buf_offset, true); |
6c6e669e IY |
482 | sent_packets = true; |
483 | buf_offset = 0; | |
484 | continue; | |
485 | } else if (ret == -EBUSY) { | |
486 | /* | |
487 | * Firmware buffer is full. | |
a19606b4 IY |
488 | * Queue back last skb, and stop aggregating. |
489 | */ | |
6742f554 | 490 | wl1271_skb_queue_head(wl, skb); |
a522550a IY |
491 | /* No work left, avoid scheduling redundant tx work */ |
492 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 493 | goto out_ack; |
f5fc0f86 LC |
494 | } else if (ret < 0) { |
495 | dev_kfree_skb(skb); | |
ffb591cd | 496 | goto out_ack; |
f5fc0f86 | 497 | } |
a19606b4 IY |
498 | buf_offset += ret; |
499 | wl->tx_packets_count++; | |
f5fc0f86 LC |
500 | } |
501 | ||
ffb591cd | 502 | out_ack: |
a19606b4 IY |
503 | if (buf_offset) { |
504 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
505 | buf_offset, true); | |
6c6e669e IY |
506 | sent_packets = true; |
507 | } | |
508 | if (sent_packets) { | |
606ea9fa IY |
509 | /* |
510 | * Interrupt the firmware with the new packets. This is only | |
511 | * required for older hardware revisions | |
512 | */ | |
513 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
514 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
515 | wl->tx_packets_count); | |
516 | ||
a8c0ddb5 | 517 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 518 | } |
ffb591cd | 519 | |
f5fc0f86 LC |
520 | out: |
521 | if (woken_up) | |
522 | wl1271_ps_elp_sleep(wl); | |
a522550a | 523 | } |
f5fc0f86 | 524 | |
a522550a IY |
525 | void wl1271_tx_work(struct work_struct *work) |
526 | { | |
527 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
528 | ||
529 | mutex_lock(&wl->mutex); | |
530 | wl1271_tx_work_locked(wl); | |
f5fc0f86 LC |
531 | mutex_unlock(&wl->mutex); |
532 | } | |
533 | ||
534 | static void wl1271_tx_complete_packet(struct wl1271 *wl, | |
535 | struct wl1271_tx_hw_res_descr *result) | |
536 | { | |
f5fc0f86 LC |
537 | struct ieee80211_tx_info *info; |
538 | struct sk_buff *skb; | |
f5fc0f86 | 539 | int id = result->id; |
31627dc5 JO |
540 | int rate = -1; |
541 | u8 retries = 0; | |
f5fc0f86 LC |
542 | |
543 | /* check for id legality */ | |
ffb591cd | 544 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
545 | wl1271_warning("TX result illegal id: %d", id); |
546 | return; | |
547 | } | |
548 | ||
549 | skb = wl->tx_frames[id]; | |
550 | info = IEEE80211_SKB_CB(skb); | |
551 | ||
31627dc5 JO |
552 | /* update the TX status info */ |
553 | if (result->status == TX_SUCCESS) { | |
554 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 555 | info->flags |= IEEE80211_TX_STAT_ACK; |
6a2de93b | 556 | rate = wl1271_rate_to_idx(result->rate_class_index, wl->band); |
31627dc5 JO |
557 | retries = result->ack_failures; |
558 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
559 | wl->stats.excessive_retries++; | |
560 | retries = result->ack_failures; | |
f5fc0f86 LC |
561 | } |
562 | ||
31627dc5 JO |
563 | info->status.rates[0].idx = rate; |
564 | info->status.rates[0].count = retries; | |
565 | info->status.rates[0].flags = 0; | |
566 | info->status.ack_signal = -1; | |
567 | ||
f5fc0f86 LC |
568 | wl->stats.retry_count += result->ack_failures; |
569 | ||
ac4e4ce5 | 570 | /* update security sequence number */ |
04e36fc5 JO |
571 | wl->tx_security_seq += (result->lsb_security_sequence_number - |
572 | wl->tx_security_last_seq); | |
ac4e4ce5 JO |
573 | wl->tx_security_last_seq = result->lsb_security_sequence_number; |
574 | ||
1e2b7976 JO |
575 | /* remove private header from packet */ |
576 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
577 | ||
578 | /* remove TKIP header space if present */ | |
f5fc0f86 | 579 | if (info->control.hw_key && |
97359d12 | 580 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
581 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
582 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
583 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
584 | } | |
f5fc0f86 LC |
585 | |
586 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
587 | " status 0x%x", | |
588 | result->id, skb, result->ack_failures, | |
589 | result->rate_class_index, result->status); | |
590 | ||
f5fc0f86 | 591 | /* return the packet to the stack */ |
a620865e IY |
592 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
593 | ieee80211_queue_work(wl->hw, &wl->netstack_work); | |
25eeb9e3 | 594 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
595 | } |
596 | ||
597 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 598 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
599 | { |
600 | struct wl1271_acx_mem_map *memmap = | |
601 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 602 | u32 count, fw_counter; |
f5fc0f86 LC |
603 | u32 i; |
604 | ||
f5fc0f86 | 605 | /* read the tx results from the chipset */ |
7b048c52 TP |
606 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
607 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
608 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
609 | ||
610 | /* write host counter to chipset (to ack) */ | |
611 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
612 | offsetof(struct wl1271_tx_hw_res_if, | |
613 | tx_result_host_counter), fw_counter); | |
614 | ||
615 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 616 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
617 | |
618 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 619 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 620 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
621 | |
622 | /* process the results */ | |
623 | for (i = 0; i < count; i++) { | |
624 | struct wl1271_tx_hw_res_descr *result; | |
625 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
626 | ||
627 | /* process the packet */ | |
628 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
629 | wl1271_tx_complete_packet(wl, result); | |
630 | ||
631 | wl->tx_results_count++; | |
632 | } | |
f5fc0f86 LC |
633 | } |
634 | ||
a8c0ddb5 AN |
635 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
636 | { | |
637 | struct sk_buff *skb; | |
638 | int i, total = 0; | |
639 | unsigned long flags; | |
1d36cd89 | 640 | struct ieee80211_tx_info *info; |
a8c0ddb5 AN |
641 | |
642 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
643 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { | |
644 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
1d36cd89 AN |
645 | info = IEEE80211_SKB_CB(skb); |
646 | info->status.rates[0].idx = -1; | |
647 | info->status.rates[0].count = 0; | |
a8c0ddb5 AN |
648 | ieee80211_tx_status(wl->hw, skb); |
649 | total++; | |
650 | } | |
651 | } | |
652 | ||
653 | spin_lock_irqsave(&wl->wl_lock, flags); | |
654 | wl->tx_queue_count -= total; | |
655 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
656 | ||
657 | wl1271_handle_tx_low_watermark(wl); | |
658 | } | |
659 | ||
f5fc0f86 | 660 | /* caller must hold wl->mutex */ |
781608c4 | 661 | void wl1271_tx_reset(struct wl1271 *wl) |
f5fc0f86 LC |
662 | { |
663 | int i; | |
664 | struct sk_buff *skb; | |
1d36cd89 | 665 | struct ieee80211_tx_info *info; |
f5fc0f86 LC |
666 | |
667 | /* TX failure */ | |
a8c0ddb5 | 668 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
09039f42 | 669 | for (i = 0; i < AP_MAX_LINKS; i++) { |
a8c0ddb5 | 670 | wl1271_tx_reset_link_queues(wl, i); |
09039f42 AN |
671 | wl->links[i].allocated_blks = 0; |
672 | wl->links[i].prev_freed_blks = 0; | |
673 | } | |
a8c0ddb5 AN |
674 | |
675 | wl->last_tx_hlid = 0; | |
676 | } else { | |
677 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
678 | while ((skb = skb_dequeue(&wl->tx_queue[i]))) { | |
679 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", | |
680 | skb); | |
1d36cd89 AN |
681 | info = IEEE80211_SKB_CB(skb); |
682 | info->status.rates[0].idx = -1; | |
683 | info->status.rates[0].count = 0; | |
a8c0ddb5 AN |
684 | ieee80211_tx_status(wl->hw, skb); |
685 | } | |
6742f554 | 686 | } |
f5fc0f86 | 687 | } |
a8c0ddb5 | 688 | |
6742f554 | 689 | wl->tx_queue_count = 0; |
f5fc0f86 | 690 | |
2fe33e8c IY |
691 | /* |
692 | * Make sure the driver is at a consistent state, in case this | |
693 | * function is called from a context other than interface removal. | |
694 | */ | |
a8c0ddb5 | 695 | wl1271_handle_tx_low_watermark(wl); |
2fe33e8c | 696 | |
50e9f746 IY |
697 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
698 | if (wl->tx_frames[i] == NULL) | |
699 | continue; | |
700 | ||
701 | skb = wl->tx_frames[i]; | |
702 | wl1271_free_tx_id(wl, i); | |
703 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
704 | ||
705 | /* Remove private headers before passing the skb to mac80211 */ | |
706 | info = IEEE80211_SKB_CB(skb); | |
707 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
708 | if (info->control.hw_key && | |
709 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
710 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
711 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, | |
712 | hdrlen); | |
713 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
f5fc0f86 | 714 | } |
50e9f746 IY |
715 | |
716 | info->status.rates[0].idx = -1; | |
717 | info->status.rates[0].count = 0; | |
718 | ||
719 | ieee80211_tx_status(wl->hw, skb); | |
720 | } | |
781608c4 JO |
721 | } |
722 | ||
723 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
724 | ||
725 | /* caller must *NOT* hold wl->mutex */ | |
726 | void wl1271_tx_flush(struct wl1271 *wl) | |
727 | { | |
728 | unsigned long timeout; | |
729 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
730 | ||
731 | while (!time_after(jiffies, timeout)) { | |
732 | mutex_lock(&wl->mutex); | |
a8c0ddb5 AN |
733 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
734 | wl->tx_frames_cnt, wl->tx_queue_count); | |
6742f554 | 735 | if ((wl->tx_frames_cnt == 0) && (wl->tx_queue_count == 0)) { |
781608c4 JO |
736 | mutex_unlock(&wl->mutex); |
737 | return; | |
738 | } | |
739 | mutex_unlock(&wl->mutex); | |
740 | msleep(1); | |
741 | } | |
742 | ||
743 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 744 | } |
e0fe371b AN |
745 | |
746 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl) | |
747 | { | |
748 | int i; | |
749 | u32 rate = 0; | |
750 | ||
751 | if (!wl->basic_rate_set) { | |
752 | WARN_ON(1); | |
753 | wl->basic_rate_set = wl->conf.tx.basic_rate; | |
754 | } | |
755 | ||
756 | for (i = 0; !rate; i++) { | |
757 | if ((wl->basic_rate_set >> i) & 0x1) | |
758 | rate = 1 << i; | |
759 | } | |
760 | ||
761 | return rate; | |
762 | } |