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)) { | |
ef2e3004 IY |
68 | if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS)) |
69 | clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
70 | ||
25eeb9e3 IY |
71 | wl->tx_frames[id] = NULL; |
72 | wl->tx_frames_cnt--; | |
73 | } | |
f5fc0f86 LC |
74 | } |
75 | ||
c5745187 OBC |
76 | static int wl1271_tx_update_filters(struct wl1271 *wl, |
77 | struct sk_buff *skb) | |
78 | { | |
79 | struct ieee80211_hdr *hdr; | |
80 | ||
81 | hdr = (struct ieee80211_hdr *)(skb->data + | |
82 | sizeof(struct wl1271_tx_hw_descr)); | |
83 | ||
84 | /* | |
85 | * stop bssid-based filtering before transmitting authentication | |
86 | * requests. this way the hw will never drop authentication | |
87 | * responses coming from BSSIDs it isn't familiar with (e.g. on | |
88 | * roaming) | |
89 | */ | |
90 | if (!ieee80211_is_auth(hdr->frame_control)) | |
91 | return 0; | |
92 | ||
93 | wl1271_configure_filters(wl, FIF_OTHER_BSS); | |
94 | ||
95 | return wl1271_acx_rx_config(wl, wl->rx_config, wl->rx_filter); | |
96 | } | |
97 | ||
99a2775d AN |
98 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
99 | struct sk_buff *skb) | |
100 | { | |
101 | struct ieee80211_hdr *hdr; | |
102 | ||
103 | /* | |
104 | * add the station to the known list before transmitting the | |
105 | * authentication response. this way it won't get de-authed by FW | |
106 | * when transmitting too soon. | |
107 | */ | |
108 | hdr = (struct ieee80211_hdr *)(skb->data + | |
109 | sizeof(struct wl1271_tx_hw_descr)); | |
110 | if (ieee80211_is_auth(hdr->frame_control)) | |
111 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
112 | } | |
113 | ||
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 | } | |
133 | ||
a8c0ddb5 AN |
134 | u8 wl1271_tx_get_hlid(struct sk_buff *skb) |
135 | { | |
136 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
137 | ||
138 | if (control->control.sta) { | |
139 | struct wl1271_station *wl_sta; | |
140 | ||
141 | wl_sta = (struct wl1271_station *) | |
142 | control->control.sta->drv_priv; | |
143 | return wl_sta->hlid; | |
144 | } else { | |
145 | struct ieee80211_hdr *hdr; | |
146 | ||
147 | hdr = (struct ieee80211_hdr *)skb->data; | |
148 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
149 | return WL1271_AP_GLOBAL_HLID; | |
150 | else | |
151 | return WL1271_AP_BROADCAST_HLID; | |
152 | } | |
153 | } | |
154 | ||
0da13da7 IY |
155 | static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl, |
156 | unsigned int packet_length) | |
157 | { | |
158 | if (wl->quirks & WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT) | |
159 | return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); | |
160 | else | |
161 | return ALIGN(packet_length, WL1271_TX_ALIGN_TO); | |
162 | } | |
163 | ||
a19606b4 | 164 | static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra, |
09039f42 | 165 | u32 buf_offset, u8 hlid) |
f5fc0f86 LC |
166 | { |
167 | struct wl1271_tx_hw_descr *desc; | |
168 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 169 | u32 len; |
5c9417f1 | 170 | u32 total_blocks; |
f5fc0f86 | 171 | int id, ret = -EBUSY; |
e7ddf549 LC |
172 | u32 spare_blocks; |
173 | ||
174 | if (unlikely(wl->quirks & WL12XX_QUIRK_USE_2_SPARE_BLOCKS)) | |
175 | spare_blocks = 2; | |
176 | else | |
177 | spare_blocks = 1; | |
f5fc0f86 | 178 | |
a19606b4 | 179 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 180 | return -EAGAIN; |
a19606b4 | 181 | |
f5fc0f86 | 182 | /* allocate free identifier for the packet */ |
25eeb9e3 | 183 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
184 | if (id < 0) |
185 | return id; | |
186 | ||
187 | /* approximate the number of blocks required for this packet | |
188 | in the firmware */ | |
0da13da7 | 189 | len = wl12xx_calc_packet_alignment(wl, total_len); |
48a61477 SL |
190 | |
191 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + | |
e7ddf549 | 192 | spare_blocks; |
48a61477 | 193 | |
f5fc0f86 LC |
194 | if (total_blocks <= wl->tx_blocks_available) { |
195 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
196 | skb, total_len - skb->len); | |
197 | ||
ae77eccf SL |
198 | /* HW descriptor fields change between wl127x and wl128x */ |
199 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
200 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
201 | } else { | |
e7ddf549 | 202 | desc->wl127x_mem.extra_blocks = spare_blocks; |
ae77eccf SL |
203 | desc->wl127x_mem.total_mem_blocks = total_blocks; |
204 | } | |
205 | ||
f5fc0f86 LC |
206 | desc->id = id; |
207 | ||
208 | wl->tx_blocks_available -= total_blocks; | |
d2f4d47d | 209 | wl->tx_allocated_blocks += total_blocks; |
f5fc0f86 | 210 | |
09039f42 AN |
211 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
212 | wl->links[hlid].allocated_blks += total_blocks; | |
213 | ||
f5fc0f86 LC |
214 | ret = 0; |
215 | ||
216 | wl1271_debug(DEBUG_TX, | |
217 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
218 | total_len, total_blocks, id); | |
781608c4 | 219 | } else { |
25eeb9e3 | 220 | wl1271_free_tx_id(wl, id); |
781608c4 | 221 | } |
f5fc0f86 LC |
222 | |
223 | return ret; | |
224 | } | |
225 | ||
990f5de7 IY |
226 | static bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) |
227 | { | |
228 | return wl->dummy_packet == skb; | |
229 | } | |
230 | ||
a19606b4 | 231 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb, |
09039f42 AN |
232 | u32 extra, struct ieee80211_tx_info *control, |
233 | u8 hlid) | |
f5fc0f86 | 234 | { |
ac5e1e39 | 235 | struct timespec ts; |
f5fc0f86 | 236 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 237 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 238 | s64 hosttime; |
d0f63b20 | 239 | u16 tx_attr; |
f5fc0f86 LC |
240 | |
241 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
242 | ||
1e2b7976 JO |
243 | /* relocate space for security header */ |
244 | if (extra) { | |
245 | void *framestart = skb->data + sizeof(*desc); | |
246 | u16 fc = *(u16 *)(framestart + extra); | |
d0f63b20 | 247 | int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc)); |
1e2b7976 JO |
248 | memmove(framestart, framestart + extra, hdrlen); |
249 | } | |
250 | ||
f5fc0f86 | 251 | /* configure packet life time */ |
ac5e1e39 JO |
252 | getnstimeofday(&ts); |
253 | hosttime = (timespec_to_ns(&ts) >> 10); | |
254 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d AN |
255 | |
256 | if (wl->bss_type != BSS_TYPE_AP_BSS) | |
257 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); | |
258 | else | |
259 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 260 | |
db674d24 | 261 | /* queue */ |
c6999d83 | 262 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 263 | desc->tid = skb->priority; |
c6c8a65d | 264 | |
990f5de7 | 265 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
266 | /* |
267 | * FW expects the dummy packet to have an invalid session id - | |
268 | * any session id that is different than the one set in the join | |
269 | */ | |
270 | tx_attr = ((~wl->session_counter) << | |
271 | TX_HW_ATTR_OFST_SESSION_COUNTER) & | |
272 | TX_HW_ATTR_SESSION_COUNTER; | |
273 | ||
274 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
ae47c45f SL |
275 | } else { |
276 | /* configure the tx attributes */ | |
277 | tx_attr = | |
278 | wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER; | |
279 | } | |
280 | ||
c6c8a65d | 281 | if (wl->bss_type != BSS_TYPE_AP_BSS) { |
09039f42 | 282 | desc->aid = hlid; |
c6c8a65d AN |
283 | |
284 | /* if the packets are destined for AP (have a STA entry) | |
285 | send them with AP rate policies, otherwise use default | |
286 | basic rates */ | |
287 | if (control->control.sta) | |
288 | rate_idx = ACX_TX_AP_FULL_RATE; | |
289 | else | |
290 | rate_idx = ACX_TX_BASIC_RATE; | |
291 | } else { | |
09039f42 AN |
292 | desc->hlid = hlid; |
293 | switch (hlid) { | |
294 | case WL1271_AP_GLOBAL_HLID: | |
295 | rate_idx = ACX_TX_AP_MODE_MGMT_RATE; | |
296 | break; | |
297 | case WL1271_AP_BROADCAST_HLID: | |
298 | rate_idx = ACX_TX_AP_MODE_BCST_RATE; | |
299 | break; | |
300 | default: | |
c6c8a65d | 301 | rate_idx = ac; |
09039f42 | 302 | break; |
c6c8a65d AN |
303 | } |
304 | } | |
305 | ||
306 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
307 | desc->reserved = 0; |
308 | ||
0da13da7 | 309 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 310 | |
0da13da7 | 311 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
312 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
313 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
314 | |
315 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
316 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
317 | desc->hlid, tx_attr, | |
318 | le16_to_cpu(desc->length), | |
319 | le16_to_cpu(desc->life_time), | |
320 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
321 | } else { |
322 | int pad; | |
323 | ||
0da13da7 | 324 | /* Store the aligned length in terms of words */ |
48a61477 SL |
325 | desc->length = cpu_to_le16(aligned_len >> 2); |
326 | ||
327 | /* calculate number of padding bytes */ | |
328 | pad = aligned_len - skb->len; | |
329 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 330 | |
ae77eccf SL |
331 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
332 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
333 | desc->hlid, tx_attr, | |
334 | le16_to_cpu(desc->length), | |
335 | le16_to_cpu(desc->life_time), | |
336 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 337 | } |
d0f63b20 LC |
338 | |
339 | desc->tx_attr = cpu_to_le16(tx_attr); | |
f5fc0f86 LC |
340 | } |
341 | ||
342 | /* caller must hold wl->mutex */ | |
a19606b4 IY |
343 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb, |
344 | u32 buf_offset) | |
f5fc0f86 LC |
345 | { |
346 | struct ieee80211_tx_info *info; | |
347 | u32 extra = 0; | |
348 | int ret = 0; | |
a19606b4 | 349 | u32 total_len; |
09039f42 | 350 | u8 hlid; |
f5fc0f86 LC |
351 | |
352 | if (!skb) | |
353 | return -EINVAL; | |
354 | ||
355 | info = IEEE80211_SKB_CB(skb); | |
356 | ||
357 | if (info->control.hw_key && | |
97359d12 | 358 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
359 | extra = WL1271_TKIP_IV_SPACE; |
360 | ||
361 | if (info->control.hw_key) { | |
7f179b46 AN |
362 | bool is_wep; |
363 | u8 idx = info->control.hw_key->hw_key_idx; | |
364 | u32 cipher = info->control.hw_key->cipher; | |
365 | ||
366 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
367 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 368 | |
7f179b46 AN |
369 | if (unlikely(is_wep && wl->default_key != idx)) { |
370 | ret = wl1271_set_default_wep_key(wl, idx); | |
f5fc0f86 LC |
371 | if (ret < 0) |
372 | return ret; | |
ee444cf0 | 373 | wl->default_key = idx; |
f5fc0f86 LC |
374 | } |
375 | } | |
376 | ||
09039f42 AN |
377 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
378 | hlid = wl1271_tx_get_hlid(skb); | |
379 | else | |
380 | hlid = TX_HW_DEFAULT_AID; | |
381 | ||
382 | ret = wl1271_tx_allocate(wl, skb, extra, buf_offset, hlid); | |
f5fc0f86 LC |
383 | if (ret < 0) |
384 | return ret; | |
385 | ||
b622d992 | 386 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 387 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
b622d992 | 388 | wl1271_tx_regulate_link(wl, hlid); |
c5745187 OBC |
389 | } else { |
390 | wl1271_tx_update_filters(wl, skb); | |
b622d992 | 391 | } |
99a2775d | 392 | |
09039f42 | 393 | wl1271_tx_fill_hdr(wl, skb, extra, info, hlid); |
f5fc0f86 | 394 | |
a19606b4 | 395 | /* |
48a61477 SL |
396 | * The length of each packet is stored in terms of |
397 | * words. Thus, we must pad the skb data to make sure its | |
398 | * length is aligned. The number of padding bytes is computed | |
399 | * and set in wl1271_tx_fill_hdr. | |
400 | * In special cases, we want to align to a specific block size | |
401 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 402 | */ |
0da13da7 | 403 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 404 | |
a19606b4 IY |
405 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
406 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 407 | |
990f5de7 IY |
408 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
409 | if (wl12xx_is_dummy_packet(wl, skb)) | |
410 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
411 | ||
a19606b4 | 412 | return total_len; |
f5fc0f86 LC |
413 | } |
414 | ||
ebba60c6 | 415 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set) |
830fb67b JO |
416 | { |
417 | struct ieee80211_supported_band *band; | |
418 | u32 enabled_rates = 0; | |
419 | int bit; | |
420 | ||
421 | band = wl->hw->wiphy->bands[wl->band]; | |
422 | for (bit = 0; bit < band->n_bitrates; bit++) { | |
423 | if (rate_set & 0x1) | |
424 | enabled_rates |= band->bitrates[bit].hw_value; | |
425 | rate_set >>= 1; | |
426 | } | |
427 | ||
00d20100 | 428 | #ifdef CONFIG_WL12XX_HT |
18357850 SL |
429 | /* MCS rates indication are on bits 16 - 23 */ |
430 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
431 | ||
432 | for (bit = 0; bit < 8; bit++) { | |
433 | if (rate_set & 0x1) | |
434 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
435 | rate_set >>= 1; | |
436 | } | |
437 | #endif | |
438 | ||
830fb67b JO |
439 | return enabled_rates; |
440 | } | |
441 | ||
a8c0ddb5 | 442 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
443 | { |
444 | unsigned long flags; | |
445 | ||
446 | if (test_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags) && | |
6742f554 | 447 | wl->tx_queue_count <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
2fe33e8c IY |
448 | /* firmware buffer has space, restart queues */ |
449 | spin_lock_irqsave(&wl->wl_lock, flags); | |
450 | ieee80211_wake_queues(wl->hw); | |
451 | clear_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags); | |
452 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
453 | } | |
454 | } | |
455 | ||
a8c0ddb5 | 456 | static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl) |
6742f554 JO |
457 | { |
458 | struct sk_buff *skb = NULL; | |
459 | unsigned long flags; | |
460 | ||
461 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VO]); | |
462 | if (skb) | |
463 | goto out; | |
464 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VI]); | |
465 | if (skb) | |
466 | goto out; | |
467 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BE]); | |
468 | if (skb) | |
469 | goto out; | |
470 | skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BK]); | |
471 | ||
472 | out: | |
473 | if (skb) { | |
474 | spin_lock_irqsave(&wl->wl_lock, flags); | |
475 | wl->tx_queue_count--; | |
476 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
477 | } | |
478 | ||
479 | return skb; | |
480 | } | |
481 | ||
a8c0ddb5 AN |
482 | static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl) |
483 | { | |
484 | struct sk_buff *skb = NULL; | |
485 | unsigned long flags; | |
486 | int i, h, start_hlid; | |
487 | ||
488 | /* start from the link after the last one */ | |
489 | start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS; | |
490 | ||
491 | /* dequeue according to AC, round robin on each link */ | |
492 | for (i = 0; i < AP_MAX_LINKS; i++) { | |
493 | h = (start_hlid + i) % AP_MAX_LINKS; | |
494 | ||
495 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VO]); | |
496 | if (skb) | |
497 | goto out; | |
498 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VI]); | |
499 | if (skb) | |
500 | goto out; | |
501 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BE]); | |
502 | if (skb) | |
503 | goto out; | |
504 | skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BK]); | |
505 | if (skb) | |
506 | goto out; | |
507 | } | |
508 | ||
509 | out: | |
510 | if (skb) { | |
511 | wl->last_tx_hlid = h; | |
512 | spin_lock_irqsave(&wl->wl_lock, flags); | |
513 | wl->tx_queue_count--; | |
514 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
515 | } else { | |
516 | wl->last_tx_hlid = 0; | |
517 | } | |
518 | ||
519 | return skb; | |
520 | } | |
521 | ||
522 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) | |
523 | { | |
990f5de7 IY |
524 | unsigned long flags; |
525 | struct sk_buff *skb = NULL; | |
526 | ||
a8c0ddb5 | 527 | if (wl->bss_type == BSS_TYPE_AP_BSS) |
990f5de7 IY |
528 | skb = wl1271_ap_skb_dequeue(wl); |
529 | else | |
530 | skb = wl1271_sta_skb_dequeue(wl); | |
a8c0ddb5 | 531 | |
990f5de7 IY |
532 | if (!skb && |
533 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
534 | skb = wl->dummy_packet; | |
535 | spin_lock_irqsave(&wl->wl_lock, flags); | |
536 | wl->tx_queue_count--; | |
537 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
538 | } | |
539 | ||
540 | return skb; | |
a8c0ddb5 AN |
541 | } |
542 | ||
6742f554 JO |
543 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb) |
544 | { | |
545 | unsigned long flags; | |
546 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
547 | ||
990f5de7 IY |
548 | if (wl12xx_is_dummy_packet(wl, skb)) { |
549 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
550 | } else if (wl->bss_type == BSS_TYPE_AP_BSS) { | |
a8c0ddb5 AN |
551 | u8 hlid = wl1271_tx_get_hlid(skb); |
552 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); | |
553 | ||
554 | /* make sure we dequeue the same packet next time */ | |
555 | wl->last_tx_hlid = (hlid + AP_MAX_LINKS - 1) % AP_MAX_LINKS; | |
556 | } else { | |
557 | skb_queue_head(&wl->tx_queue[q], skb); | |
558 | } | |
559 | ||
6742f554 JO |
560 | spin_lock_irqsave(&wl->wl_lock, flags); |
561 | wl->tx_queue_count++; | |
562 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
563 | } | |
564 | ||
a522550a | 565 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 566 | { |
f5fc0f86 | 567 | struct sk_buff *skb; |
6c6e669e IY |
568 | u32 buf_offset = 0; |
569 | bool sent_packets = false; | |
f5fc0f86 LC |
570 | int ret; |
571 | ||
f5fc0f86 | 572 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 573 | return; |
f5fc0f86 | 574 | |
6742f554 | 575 | while ((skb = wl1271_skb_dequeue(wl))) { |
a19606b4 | 576 | ret = wl1271_prepare_tx_frame(wl, skb, buf_offset); |
6c6e669e | 577 | if (ret == -EAGAIN) { |
a19606b4 | 578 | /* |
6c6e669e IY |
579 | * Aggregation buffer is full. |
580 | * Flush buffer and try again. | |
581 | */ | |
6742f554 | 582 | wl1271_skb_queue_head(wl, skb); |
6c6e669e | 583 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 584 | buf_offset, true); |
6c6e669e IY |
585 | sent_packets = true; |
586 | buf_offset = 0; | |
587 | continue; | |
588 | } else if (ret == -EBUSY) { | |
589 | /* | |
590 | * Firmware buffer is full. | |
a19606b4 IY |
591 | * Queue back last skb, and stop aggregating. |
592 | */ | |
6742f554 | 593 | wl1271_skb_queue_head(wl, skb); |
a522550a IY |
594 | /* No work left, avoid scheduling redundant tx work */ |
595 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 596 | goto out_ack; |
f5fc0f86 LC |
597 | } else if (ret < 0) { |
598 | dev_kfree_skb(skb); | |
ffb591cd | 599 | goto out_ack; |
f5fc0f86 | 600 | } |
a19606b4 IY |
601 | buf_offset += ret; |
602 | wl->tx_packets_count++; | |
f5fc0f86 LC |
603 | } |
604 | ||
ffb591cd | 605 | out_ack: |
a19606b4 IY |
606 | if (buf_offset) { |
607 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
608 | buf_offset, true); | |
6c6e669e IY |
609 | sent_packets = true; |
610 | } | |
611 | if (sent_packets) { | |
606ea9fa IY |
612 | /* |
613 | * Interrupt the firmware with the new packets. This is only | |
614 | * required for older hardware revisions | |
615 | */ | |
616 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
617 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
618 | wl->tx_packets_count); | |
619 | ||
a8c0ddb5 | 620 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 621 | } |
a522550a | 622 | } |
f5fc0f86 | 623 | |
a522550a IY |
624 | void wl1271_tx_work(struct work_struct *work) |
625 | { | |
626 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 627 | int ret; |
a522550a IY |
628 | |
629 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
630 | ret = wl1271_ps_elp_wakeup(wl); |
631 | if (ret < 0) | |
632 | goto out; | |
633 | ||
a522550a | 634 | wl1271_tx_work_locked(wl); |
c1b193eb | 635 | |
c75bbcdb | 636 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 637 | out: |
f5fc0f86 LC |
638 | mutex_unlock(&wl->mutex); |
639 | } | |
640 | ||
641 | static void wl1271_tx_complete_packet(struct wl1271 *wl, | |
642 | struct wl1271_tx_hw_res_descr *result) | |
643 | { | |
f5fc0f86 LC |
644 | struct ieee80211_tx_info *info; |
645 | struct sk_buff *skb; | |
f5fc0f86 | 646 | int id = result->id; |
31627dc5 JO |
647 | int rate = -1; |
648 | u8 retries = 0; | |
f5fc0f86 LC |
649 | |
650 | /* check for id legality */ | |
ffb591cd | 651 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
652 | wl1271_warning("TX result illegal id: %d", id); |
653 | return; | |
654 | } | |
655 | ||
656 | skb = wl->tx_frames[id]; | |
657 | info = IEEE80211_SKB_CB(skb); | |
658 | ||
990f5de7 | 659 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
660 | wl1271_free_tx_id(wl, id); |
661 | return; | |
662 | } | |
663 | ||
31627dc5 JO |
664 | /* update the TX status info */ |
665 | if (result->status == TX_SUCCESS) { | |
666 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 667 | info->flags |= IEEE80211_TX_STAT_ACK; |
6a2de93b | 668 | rate = wl1271_rate_to_idx(result->rate_class_index, wl->band); |
31627dc5 JO |
669 | retries = result->ack_failures; |
670 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
671 | wl->stats.excessive_retries++; | |
672 | retries = result->ack_failures; | |
f5fc0f86 LC |
673 | } |
674 | ||
31627dc5 JO |
675 | info->status.rates[0].idx = rate; |
676 | info->status.rates[0].count = retries; | |
677 | info->status.rates[0].flags = 0; | |
678 | info->status.ack_signal = -1; | |
679 | ||
f5fc0f86 LC |
680 | wl->stats.retry_count += result->ack_failures; |
681 | ||
ac4e4ce5 | 682 | /* update security sequence number */ |
04e36fc5 JO |
683 | wl->tx_security_seq += (result->lsb_security_sequence_number - |
684 | wl->tx_security_last_seq); | |
ac4e4ce5 JO |
685 | wl->tx_security_last_seq = result->lsb_security_sequence_number; |
686 | ||
1e2b7976 JO |
687 | /* remove private header from packet */ |
688 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
689 | ||
690 | /* remove TKIP header space if present */ | |
f5fc0f86 | 691 | if (info->control.hw_key && |
97359d12 | 692 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
693 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
694 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
695 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
696 | } | |
f5fc0f86 LC |
697 | |
698 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
699 | " status 0x%x", | |
700 | result->id, skb, result->ack_failures, | |
701 | result->rate_class_index, result->status); | |
702 | ||
f5fc0f86 | 703 | /* return the packet to the stack */ |
a620865e IY |
704 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
705 | ieee80211_queue_work(wl->hw, &wl->netstack_work); | |
25eeb9e3 | 706 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
707 | } |
708 | ||
709 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 710 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
711 | { |
712 | struct wl1271_acx_mem_map *memmap = | |
713 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 714 | u32 count, fw_counter; |
f5fc0f86 LC |
715 | u32 i; |
716 | ||
f5fc0f86 | 717 | /* read the tx results from the chipset */ |
7b048c52 TP |
718 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
719 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
720 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
721 | ||
722 | /* write host counter to chipset (to ack) */ | |
723 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
724 | offsetof(struct wl1271_tx_hw_res_if, | |
725 | tx_result_host_counter), fw_counter); | |
726 | ||
727 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 728 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
729 | |
730 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 731 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 732 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
733 | |
734 | /* process the results */ | |
735 | for (i = 0; i < count; i++) { | |
736 | struct wl1271_tx_hw_res_descr *result; | |
737 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
738 | ||
739 | /* process the packet */ | |
740 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
741 | wl1271_tx_complete_packet(wl, result); | |
742 | ||
743 | wl->tx_results_count++; | |
744 | } | |
f5fc0f86 LC |
745 | } |
746 | ||
a8c0ddb5 AN |
747 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
748 | { | |
749 | struct sk_buff *skb; | |
750 | int i, total = 0; | |
751 | unsigned long flags; | |
1d36cd89 | 752 | struct ieee80211_tx_info *info; |
a8c0ddb5 AN |
753 | |
754 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
755 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { | |
756 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
1d36cd89 AN |
757 | info = IEEE80211_SKB_CB(skb); |
758 | info->status.rates[0].idx = -1; | |
759 | info->status.rates[0].count = 0; | |
a8c0ddb5 AN |
760 | ieee80211_tx_status(wl->hw, skb); |
761 | total++; | |
762 | } | |
763 | } | |
764 | ||
765 | spin_lock_irqsave(&wl->wl_lock, flags); | |
766 | wl->tx_queue_count -= total; | |
767 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
768 | ||
769 | wl1271_handle_tx_low_watermark(wl); | |
770 | } | |
771 | ||
f5fc0f86 | 772 | /* caller must hold wl->mutex */ |
781608c4 | 773 | void wl1271_tx_reset(struct wl1271 *wl) |
f5fc0f86 LC |
774 | { |
775 | int i; | |
776 | struct sk_buff *skb; | |
1d36cd89 | 777 | struct ieee80211_tx_info *info; |
f5fc0f86 LC |
778 | |
779 | /* TX failure */ | |
a8c0ddb5 | 780 | if (wl->bss_type == BSS_TYPE_AP_BSS) { |
09039f42 | 781 | for (i = 0; i < AP_MAX_LINKS; i++) { |
a8c0ddb5 | 782 | wl1271_tx_reset_link_queues(wl, i); |
09039f42 AN |
783 | wl->links[i].allocated_blks = 0; |
784 | wl->links[i].prev_freed_blks = 0; | |
785 | } | |
a8c0ddb5 AN |
786 | |
787 | wl->last_tx_hlid = 0; | |
788 | } else { | |
789 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
790 | while ((skb = skb_dequeue(&wl->tx_queue[i]))) { | |
791 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", | |
792 | skb); | |
ae47c45f | 793 | |
990f5de7 | 794 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
795 | info = IEEE80211_SKB_CB(skb); |
796 | info->status.rates[0].idx = -1; | |
797 | info->status.rates[0].count = 0; | |
798 | ieee80211_tx_status(wl->hw, skb); | |
799 | } | |
a8c0ddb5 | 800 | } |
6742f554 | 801 | } |
f5fc0f86 | 802 | } |
a8c0ddb5 | 803 | |
6742f554 | 804 | wl->tx_queue_count = 0; |
f5fc0f86 | 805 | |
2fe33e8c IY |
806 | /* |
807 | * Make sure the driver is at a consistent state, in case this | |
808 | * function is called from a context other than interface removal. | |
809 | */ | |
a8c0ddb5 | 810 | wl1271_handle_tx_low_watermark(wl); |
2fe33e8c | 811 | |
50e9f746 IY |
812 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
813 | if (wl->tx_frames[i] == NULL) | |
814 | continue; | |
815 | ||
816 | skb = wl->tx_frames[i]; | |
817 | wl1271_free_tx_id(wl, i); | |
818 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
819 | ||
990f5de7 | 820 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
821 | /* |
822 | * Remove private headers before passing the skb to | |
823 | * mac80211 | |
824 | */ | |
825 | info = IEEE80211_SKB_CB(skb); | |
826 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
827 | if (info->control.hw_key && | |
828 | info->control.hw_key->cipher == | |
829 | WLAN_CIPHER_SUITE_TKIP) { | |
830 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
831 | memmove(skb->data + WL1271_TKIP_IV_SPACE, | |
832 | skb->data, hdrlen); | |
833 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
834 | } | |
50e9f746 | 835 | |
ae47c45f SL |
836 | info->status.rates[0].idx = -1; |
837 | info->status.rates[0].count = 0; | |
50e9f746 | 838 | |
ae47c45f SL |
839 | ieee80211_tx_status(wl->hw, skb); |
840 | } | |
50e9f746 | 841 | } |
781608c4 JO |
842 | } |
843 | ||
844 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
845 | ||
846 | /* caller must *NOT* hold wl->mutex */ | |
847 | void wl1271_tx_flush(struct wl1271 *wl) | |
848 | { | |
849 | unsigned long timeout; | |
850 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
851 | ||
852 | while (!time_after(jiffies, timeout)) { | |
853 | mutex_lock(&wl->mutex); | |
a8c0ddb5 AN |
854 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
855 | wl->tx_frames_cnt, wl->tx_queue_count); | |
6742f554 | 856 | if ((wl->tx_frames_cnt == 0) && (wl->tx_queue_count == 0)) { |
781608c4 JO |
857 | mutex_unlock(&wl->mutex); |
858 | return; | |
859 | } | |
860 | mutex_unlock(&wl->mutex); | |
861 | msleep(1); | |
862 | } | |
863 | ||
864 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 865 | } |
e0fe371b AN |
866 | |
867 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl) | |
868 | { | |
869 | int i; | |
870 | u32 rate = 0; | |
871 | ||
872 | if (!wl->basic_rate_set) { | |
873 | WARN_ON(1); | |
874 | wl->basic_rate_set = wl->conf.tx.basic_rate; | |
875 | } | |
876 | ||
877 | for (i = 0; !rate; i++) { | |
878 | if ((wl->basic_rate_set >> i) & 0x1) | |
879 | rate = 1 << i; | |
880 | } | |
881 | ||
882 | return rate; | |
883 | } |