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 | |
c31be25a | 28 | #include "wlcore.h" |
0f4e3122 | 29 | #include "debug.h" |
00d20100 | 30 | #include "io.h" |
00d20100 SL |
31 | #include "ps.h" |
32 | #include "tx.h" | |
56d4f8f6 | 33 | #include "event.h" |
f5fc0f86 | 34 | |
00782136 LC |
35 | /* |
36 | * TODO: this is here just for now, it must be removed when the data | |
37 | * operations are in place. | |
38 | */ | |
39 | #include "../wl12xx/reg.h" | |
40 | ||
536129c8 EP |
41 | static int wl1271_set_default_wep_key(struct wl1271 *wl, |
42 | struct wl12xx_vif *wlvif, u8 id) | |
7f179b46 AN |
43 | { |
44 | int ret; | |
536129c8 | 45 | bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS); |
7f179b46 AN |
46 | |
47 | if (is_ap) | |
c690ec81 | 48 | ret = wl12xx_cmd_set_default_wep_key(wl, id, |
a8ab39a4 | 49 | wlvif->ap.bcast_hlid); |
7f179b46 | 50 | else |
154da67c | 51 | ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid); |
7f179b46 AN |
52 | |
53 | if (ret < 0) | |
54 | return ret; | |
55 | ||
56 | wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); | |
57 | return 0; | |
58 | } | |
59 | ||
25eeb9e3 | 60 | static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) |
f5fc0f86 | 61 | { |
25eeb9e3 IY |
62 | int id; |
63 | ||
64 | id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS); | |
65 | if (id >= ACX_TX_DESCRIPTORS) | |
66 | return -EBUSY; | |
67 | ||
68 | __set_bit(id, wl->tx_frames_map); | |
69 | wl->tx_frames[id] = skb; | |
70 | wl->tx_frames_cnt++; | |
71 | return id; | |
72 | } | |
f5fc0f86 | 73 | |
25eeb9e3 IY |
74 | static void wl1271_free_tx_id(struct wl1271 *wl, int id) |
75 | { | |
76 | if (__test_and_clear_bit(id, wl->tx_frames_map)) { | |
ef2e3004 IY |
77 | if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS)) |
78 | clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
79 | ||
25eeb9e3 IY |
80 | wl->tx_frames[id] = NULL; |
81 | wl->tx_frames_cnt--; | |
82 | } | |
f5fc0f86 LC |
83 | } |
84 | ||
99a2775d AN |
85 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
86 | struct sk_buff *skb) | |
87 | { | |
88 | struct ieee80211_hdr *hdr; | |
89 | ||
90 | /* | |
91 | * add the station to the known list before transmitting the | |
92 | * authentication response. this way it won't get de-authed by FW | |
93 | * when transmitting too soon. | |
94 | */ | |
95 | hdr = (struct ieee80211_hdr *)(skb->data + | |
96 | sizeof(struct wl1271_tx_hw_descr)); | |
97 | if (ieee80211_is_auth(hdr->frame_control)) | |
98 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
99 | } | |
100 | ||
c7ffb902 EP |
101 | static void wl1271_tx_regulate_link(struct wl1271 *wl, |
102 | struct wl12xx_vif *wlvif, | |
103 | u8 hlid) | |
b622d992 | 104 | { |
da03209e | 105 | bool fw_ps, single_sta; |
9b17f1b3 | 106 | u8 tx_pkts; |
b622d992 | 107 | |
c7ffb902 | 108 | if (WARN_ON(!test_bit(hlid, wlvif->links_map))) |
b622d992 AN |
109 | return; |
110 | ||
111 | fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map); | |
9b17f1b3 | 112 | tx_pkts = wl->links[hlid].allocated_pkts; |
da03209e | 113 | single_sta = (wl->active_sta_count == 1); |
b622d992 AN |
114 | |
115 | /* | |
116 | * if in FW PS and there is enough data in FW we can put the link | |
117 | * into high-level PS and clean out its TX queues. | |
da03209e AN |
118 | * Make an exception if this is the only connected station. In this |
119 | * case FW-memory congestion is not a problem. | |
b622d992 | 120 | */ |
da03209e | 121 | if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS) |
6e8cd331 | 122 | wl12xx_ps_link_start(wl, wlvif, hlid, true); |
b622d992 AN |
123 | } |
124 | ||
f8e0af6b | 125 | bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) |
f4df1bd5 EP |
126 | { |
127 | return wl->dummy_packet == skb; | |
128 | } | |
129 | ||
a8ab39a4 EP |
130 | u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
131 | struct sk_buff *skb) | |
a8c0ddb5 AN |
132 | { |
133 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
134 | ||
135 | if (control->control.sta) { | |
136 | struct wl1271_station *wl_sta; | |
137 | ||
138 | wl_sta = (struct wl1271_station *) | |
139 | control->control.sta->drv_priv; | |
140 | return wl_sta->hlid; | |
141 | } else { | |
142 | struct ieee80211_hdr *hdr; | |
143 | ||
53d40d0b | 144 | if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags)) |
f4df1bd5 EP |
145 | return wl->system_hlid; |
146 | ||
a8c0ddb5 AN |
147 | hdr = (struct ieee80211_hdr *)skb->data; |
148 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
a8ab39a4 | 149 | return wlvif->ap.global_hlid; |
a8c0ddb5 | 150 | else |
a8ab39a4 | 151 | return wlvif->ap.bcast_hlid; |
a8c0ddb5 AN |
152 | } |
153 | } | |
154 | ||
d6a3cc2e EP |
155 | u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
156 | struct sk_buff *skb) | |
f4df1bd5 | 157 | { |
df4c849f EP |
158 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
159 | ||
0f168014 | 160 | if (!wlvif || wl12xx_is_dummy_packet(wl, skb)) |
f4df1bd5 EP |
161 | return wl->system_hlid; |
162 | ||
536129c8 | 163 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) |
a8ab39a4 | 164 | return wl12xx_tx_get_hlid_ap(wl, wlvif, skb); |
f4df1bd5 | 165 | |
ba8447f6 | 166 | if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) || |
eee514e3 | 167 | test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) && |
df4c849f EP |
168 | !ieee80211_is_auth(hdr->frame_control) && |
169 | !ieee80211_is_assoc_req(hdr->frame_control)) | |
154da67c | 170 | return wlvif->sta.hlid; |
f4df1bd5 | 171 | else |
afaf8bdb | 172 | return wlvif->dev_hlid; |
f4df1bd5 EP |
173 | } |
174 | ||
0da13da7 IY |
175 | static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl, |
176 | unsigned int packet_length) | |
177 | { | |
6f7dd16c | 178 | if (wl->quirks & WLCORE_QUIRK_NO_BLOCKSIZE_ALIGNMENT) |
0da13da7 | 179 | return ALIGN(packet_length, WL1271_TX_ALIGN_TO); |
ce39defb LC |
180 | else |
181 | return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); | |
0da13da7 IY |
182 | } |
183 | ||
a32d0cdf | 184 | static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
185 | struct sk_buff *skb, u32 extra, u32 buf_offset, |
186 | u8 hlid) | |
f5fc0f86 LC |
187 | { |
188 | struct wl1271_tx_hw_descr *desc; | |
189 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 190 | u32 len; |
5c9417f1 | 191 | u32 total_blocks; |
742246f8 | 192 | int id, ret = -EBUSY, ac; |
e9eb8cbe | 193 | u32 spare_blocks = wl->tx_spare_blocks; |
a32d0cdf | 194 | bool is_dummy = false; |
f5fc0f86 | 195 | |
a19606b4 | 196 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 197 | return -EAGAIN; |
a19606b4 | 198 | |
f5fc0f86 | 199 | /* allocate free identifier for the packet */ |
25eeb9e3 | 200 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
201 | if (id < 0) |
202 | return id; | |
203 | ||
204 | /* approximate the number of blocks required for this packet | |
205 | in the firmware */ | |
0da13da7 | 206 | len = wl12xx_calc_packet_alignment(wl, total_len); |
48a61477 | 207 | |
e9eb8cbe | 208 | /* in case of a dummy packet, use default amount of spare mem blocks */ |
a32d0cdf EP |
209 | if (unlikely(wl12xx_is_dummy_packet(wl, skb))) { |
210 | is_dummy = true; | |
e9eb8cbe | 211 | spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT; |
a32d0cdf | 212 | } |
e9eb8cbe | 213 | |
48a61477 | 214 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + |
e7ddf549 | 215 | spare_blocks; |
48a61477 | 216 | |
f5fc0f86 LC |
217 | if (total_blocks <= wl->tx_blocks_available) { |
218 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
219 | skb, total_len - skb->len); | |
220 | ||
ae77eccf SL |
221 | /* HW descriptor fields change between wl127x and wl128x */ |
222 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
223 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
224 | } else { | |
e7ddf549 | 225 | desc->wl127x_mem.extra_blocks = spare_blocks; |
ae77eccf SL |
226 | desc->wl127x_mem.total_mem_blocks = total_blocks; |
227 | } | |
228 | ||
f5fc0f86 LC |
229 | desc->id = id; |
230 | ||
231 | wl->tx_blocks_available -= total_blocks; | |
7bb5d6ce | 232 | wl->tx_allocated_blocks += total_blocks; |
f5fc0f86 | 233 | |
55df5afb AN |
234 | /* If the FW was empty before, arm the Tx watchdog */ |
235 | if (wl->tx_allocated_blocks == total_blocks) | |
236 | wl12xx_rearm_tx_watchdog_locked(wl); | |
237 | ||
742246f8 AN |
238 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
239 | wl->tx_allocated_pkts[ac]++; | |
bf54e301 | 240 | |
0f168014 EP |
241 | if (!is_dummy && wlvif && |
242 | wlvif->bss_type == BSS_TYPE_AP_BSS && | |
c7ffb902 | 243 | test_bit(hlid, wlvif->ap.sta_hlid_map)) |
9b17f1b3 | 244 | wl->links[hlid].allocated_pkts++; |
09039f42 | 245 | |
f5fc0f86 LC |
246 | ret = 0; |
247 | ||
248 | wl1271_debug(DEBUG_TX, | |
249 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
250 | total_len, total_blocks, id); | |
781608c4 | 251 | } else { |
25eeb9e3 | 252 | wl1271_free_tx_id(wl, id); |
781608c4 | 253 | } |
f5fc0f86 LC |
254 | |
255 | return ret; | |
256 | } | |
257 | ||
a32d0cdf | 258 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
259 | struct sk_buff *skb, u32 extra, |
260 | struct ieee80211_tx_info *control, u8 hlid) | |
f5fc0f86 | 261 | { |
ac5e1e39 | 262 | struct timespec ts; |
f5fc0f86 | 263 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 264 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 265 | s64 hosttime; |
cf00f379 | 266 | u16 tx_attr = 0; |
f4f57943 EP |
267 | __le16 frame_control; |
268 | struct ieee80211_hdr *hdr; | |
269 | u8 *frame_start; | |
a32d0cdf | 270 | bool is_dummy; |
f5fc0f86 LC |
271 | |
272 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
f4f57943 EP |
273 | frame_start = (u8 *)(desc + 1); |
274 | hdr = (struct ieee80211_hdr *)(frame_start + extra); | |
275 | frame_control = hdr->frame_control; | |
f5fc0f86 | 276 | |
1e2b7976 JO |
277 | /* relocate space for security header */ |
278 | if (extra) { | |
f4f57943 EP |
279 | int hdrlen = ieee80211_hdrlen(frame_control); |
280 | memmove(frame_start, hdr, hdrlen); | |
1e2b7976 JO |
281 | } |
282 | ||
f5fc0f86 | 283 | /* configure packet life time */ |
ac5e1e39 JO |
284 | getnstimeofday(&ts); |
285 | hosttime = (timespec_to_ns(&ts) >> 10); | |
286 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d | 287 | |
a32d0cdf | 288 | is_dummy = wl12xx_is_dummy_packet(wl, skb); |
0f168014 | 289 | if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS) |
c6c8a65d AN |
290 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); |
291 | else | |
292 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 293 | |
db674d24 | 294 | /* queue */ |
c6999d83 | 295 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 296 | desc->tid = skb->priority; |
c6c8a65d | 297 | |
a32d0cdf | 298 | if (is_dummy) { |
ae47c45f SL |
299 | /* |
300 | * FW expects the dummy packet to have an invalid session id - | |
301 | * any session id that is different than the one set in the join | |
302 | */ | |
98b86253 | 303 | tx_attr = (SESSION_COUNTER_INVALID << |
ae47c45f SL |
304 | TX_HW_ATTR_OFST_SESSION_COUNTER) & |
305 | TX_HW_ATTR_SESSION_COUNTER; | |
306 | ||
307 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
0f168014 | 308 | } else if (wlvif) { |
ae47c45f | 309 | /* configure the tx attributes */ |
98b86253 EP |
310 | tx_attr = wlvif->session_counter << |
311 | TX_HW_ATTR_OFST_SESSION_COUNTER; | |
ae47c45f SL |
312 | } |
313 | ||
79b122dc | 314 | desc->hlid = hlid; |
0f168014 | 315 | if (is_dummy || !wlvif) |
a32d0cdf EP |
316 | rate_idx = 0; |
317 | else if (wlvif->bss_type != BSS_TYPE_AP_BSS) { | |
c6c8a65d AN |
318 | /* if the packets are destined for AP (have a STA entry) |
319 | send them with AP rate policies, otherwise use default | |
320 | basic rates */ | |
8a0f2ee3 EP |
321 | if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE) |
322 | rate_idx = wlvif->sta.p2p_rate_idx; | |
323 | else if (control->control.sta) | |
e5a359f8 | 324 | rate_idx = wlvif->sta.ap_rate_idx; |
c6c8a65d | 325 | else |
e5a359f8 | 326 | rate_idx = wlvif->sta.basic_rate_idx; |
c6c8a65d | 327 | } else { |
a8ab39a4 | 328 | if (hlid == wlvif->ap.global_hlid) |
e5a359f8 | 329 | rate_idx = wlvif->ap.mgmt_rate_idx; |
a8ab39a4 | 330 | else if (hlid == wlvif->ap.bcast_hlid) |
e5a359f8 | 331 | rate_idx = wlvif->ap.bcast_rate_idx; |
e51ae9be | 332 | else |
e5a359f8 | 333 | rate_idx = wlvif->ap.ucast_rate_idx[ac]; |
c6c8a65d AN |
334 | } |
335 | ||
336 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
337 | desc->reserved = 0; |
338 | ||
0da13da7 | 339 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 340 | |
0da13da7 | 341 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
342 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
343 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
344 | |
345 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
346 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
347 | desc->hlid, tx_attr, | |
348 | le16_to_cpu(desc->length), | |
349 | le16_to_cpu(desc->life_time), | |
350 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
351 | } else { |
352 | int pad; | |
353 | ||
0da13da7 | 354 | /* Store the aligned length in terms of words */ |
48a61477 SL |
355 | desc->length = cpu_to_le16(aligned_len >> 2); |
356 | ||
357 | /* calculate number of padding bytes */ | |
358 | pad = aligned_len - skb->len; | |
359 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 360 | |
ae77eccf SL |
361 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
362 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
363 | desc->hlid, tx_attr, | |
364 | le16_to_cpu(desc->length), | |
365 | le16_to_cpu(desc->life_time), | |
366 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 367 | } |
d0f63b20 | 368 | |
f4f57943 EP |
369 | /* for WEP shared auth - no fw encryption is needed */ |
370 | if (ieee80211_is_auth(frame_control) && | |
371 | ieee80211_has_protected(frame_control)) | |
372 | tx_attr |= TX_HW_ATTR_HOST_ENCRYPT; | |
373 | ||
d0f63b20 | 374 | desc->tx_attr = cpu_to_le16(tx_attr); |
f5fc0f86 LC |
375 | } |
376 | ||
377 | /* caller must hold wl->mutex */ | |
a32d0cdf EP |
378 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
379 | struct sk_buff *skb, u32 buf_offset) | |
f5fc0f86 LC |
380 | { |
381 | struct ieee80211_tx_info *info; | |
382 | u32 extra = 0; | |
383 | int ret = 0; | |
a19606b4 | 384 | u32 total_len; |
09039f42 | 385 | u8 hlid; |
536129c8 | 386 | bool is_dummy; |
f5fc0f86 LC |
387 | |
388 | if (!skb) | |
389 | return -EINVAL; | |
390 | ||
391 | info = IEEE80211_SKB_CB(skb); | |
392 | ||
536129c8 EP |
393 | /* TODO: handle dummy packets on multi-vifs */ |
394 | is_dummy = wl12xx_is_dummy_packet(wl, skb); | |
536129c8 | 395 | |
f5fc0f86 | 396 | if (info->control.hw_key && |
97359d12 | 397 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
5ec8a448 | 398 | extra = WL1271_EXTRA_SPACE_TKIP; |
f5fc0f86 LC |
399 | |
400 | if (info->control.hw_key) { | |
7f179b46 AN |
401 | bool is_wep; |
402 | u8 idx = info->control.hw_key->hw_key_idx; | |
403 | u32 cipher = info->control.hw_key->cipher; | |
404 | ||
405 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
406 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 407 | |
f75c753f | 408 | if (unlikely(is_wep && wlvif->default_key != idx)) { |
536129c8 | 409 | ret = wl1271_set_default_wep_key(wl, wlvif, idx); |
f5fc0f86 LC |
410 | if (ret < 0) |
411 | return ret; | |
f75c753f | 412 | wlvif->default_key = idx; |
f5fc0f86 LC |
413 | } |
414 | } | |
d6a3cc2e | 415 | hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); |
79b122dc | 416 | if (hlid == WL12XX_INVALID_LINK_ID) { |
e0d62536 | 417 | wl1271_error("invalid hlid. dropping skb 0x%p", skb); |
79b122dc EP |
418 | return -EINVAL; |
419 | } | |
09039f42 | 420 | |
a32d0cdf | 421 | ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid); |
f5fc0f86 LC |
422 | if (ret < 0) |
423 | return ret; | |
424 | ||
a32d0cdf | 425 | wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid); |
fae2fd76 | 426 | |
0f168014 | 427 | if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 428 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
c7ffb902 | 429 | wl1271_tx_regulate_link(wl, wlvif, hlid); |
b622d992 | 430 | } |
99a2775d | 431 | |
a19606b4 | 432 | /* |
48a61477 SL |
433 | * The length of each packet is stored in terms of |
434 | * words. Thus, we must pad the skb data to make sure its | |
435 | * length is aligned. The number of padding bytes is computed | |
436 | * and set in wl1271_tx_fill_hdr. | |
437 | * In special cases, we want to align to a specific block size | |
438 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 439 | */ |
0da13da7 | 440 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 441 | |
a19606b4 IY |
442 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
443 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 444 | |
990f5de7 | 445 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
536129c8 | 446 | if (is_dummy) |
990f5de7 IY |
447 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); |
448 | ||
a19606b4 | 449 | return total_len; |
f5fc0f86 LC |
450 | } |
451 | ||
af7fbb28 EP |
452 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, |
453 | enum ieee80211_band rate_band) | |
830fb67b JO |
454 | { |
455 | struct ieee80211_supported_band *band; | |
456 | u32 enabled_rates = 0; | |
457 | int bit; | |
458 | ||
af7fbb28 | 459 | band = wl->hw->wiphy->bands[rate_band]; |
830fb67b JO |
460 | for (bit = 0; bit < band->n_bitrates; bit++) { |
461 | if (rate_set & 0x1) | |
462 | enabled_rates |= band->bitrates[bit].hw_value; | |
463 | rate_set >>= 1; | |
464 | } | |
465 | ||
18357850 SL |
466 | /* MCS rates indication are on bits 16 - 23 */ |
467 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
468 | ||
469 | for (bit = 0; bit < 8; bit++) { | |
470 | if (rate_set & 0x1) | |
471 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
472 | rate_set >>= 1; | |
473 | } | |
18357850 | 474 | |
830fb67b JO |
475 | return enabled_rates; |
476 | } | |
477 | ||
a8c0ddb5 | 478 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
479 | { |
480 | unsigned long flags; | |
708bb3cf | 481 | int i; |
2fe33e8c | 482 | |
708bb3cf AN |
483 | for (i = 0; i < NUM_TX_QUEUES; i++) { |
484 | if (test_bit(i, &wl->stopped_queues_map) && | |
f1a46384 | 485 | wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
708bb3cf AN |
486 | /* firmware buffer has space, restart queues */ |
487 | spin_lock_irqsave(&wl->wl_lock, flags); | |
488 | ieee80211_wake_queue(wl->hw, | |
489 | wl1271_tx_get_mac80211_queue(i)); | |
490 | clear_bit(i, &wl->stopped_queues_map); | |
491 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
492 | } | |
2fe33e8c IY |
493 | } |
494 | } | |
495 | ||
742246f8 AN |
496 | static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl, |
497 | struct sk_buff_head *queues) | |
498 | { | |
499 | int i, q = -1, ac; | |
500 | u32 min_pkts = 0xffffffff; | |
501 | ||
502 | /* | |
503 | * Find a non-empty ac where: | |
504 | * 1. There are packets to transmit | |
505 | * 2. The FW has the least allocated blocks | |
506 | * | |
507 | * We prioritize the ACs according to VO>VI>BE>BK | |
508 | */ | |
509 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
510 | ac = wl1271_tx_get_queue(i); | |
511 | if (!skb_queue_empty(&queues[ac]) && | |
512 | (wl->tx_allocated_pkts[ac] < min_pkts)) { | |
513 | q = ac; | |
514 | min_pkts = wl->tx_allocated_pkts[q]; | |
515 | } | |
516 | } | |
517 | ||
518 | if (q == -1) | |
519 | return NULL; | |
520 | ||
521 | return &queues[q]; | |
522 | } | |
523 | ||
d6a3cc2e EP |
524 | static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl, |
525 | struct wl1271_link *lnk) | |
6742f554 | 526 | { |
d6a3cc2e | 527 | struct sk_buff *skb; |
6742f554 | 528 | unsigned long flags; |
742246f8 | 529 | struct sk_buff_head *queue; |
6742f554 | 530 | |
d6a3cc2e | 531 | queue = wl1271_select_queue(wl, lnk->tx_queue); |
742246f8 | 532 | if (!queue) |
d6a3cc2e | 533 | return NULL; |
742246f8 AN |
534 | |
535 | skb = skb_dequeue(queue); | |
6742f554 | 536 | if (skb) { |
f1a46384 | 537 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
6742f554 | 538 | spin_lock_irqsave(&wl->wl_lock, flags); |
6246ca00 | 539 | WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); |
f1a46384 | 540 | wl->tx_queue_count[q]--; |
6742f554 JO |
541 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
542 | } | |
543 | ||
544 | return skb; | |
545 | } | |
546 | ||
d6a3cc2e EP |
547 | static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl, |
548 | struct wl12xx_vif *wlvif) | |
a8c0ddb5 AN |
549 | { |
550 | struct sk_buff *skb = NULL; | |
a8c0ddb5 AN |
551 | int i, h, start_hlid; |
552 | ||
553 | /* start from the link after the last one */ | |
4438aca9 | 554 | start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
555 | |
556 | /* dequeue according to AC, round robin on each link */ | |
c7ffb902 EP |
557 | for (i = 0; i < WL12XX_MAX_LINKS; i++) { |
558 | h = (start_hlid + i) % WL12XX_MAX_LINKS; | |
a8c0ddb5 | 559 | |
742246f8 | 560 | /* only consider connected stations */ |
c7ffb902 | 561 | if (!test_bit(h, wlvif->links_map)) |
742246f8 AN |
562 | continue; |
563 | ||
d6a3cc2e EP |
564 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]); |
565 | if (!skb) | |
742246f8 AN |
566 | continue; |
567 | ||
d6a3cc2e EP |
568 | wlvif->last_tx_hlid = h; |
569 | break; | |
a8c0ddb5 AN |
570 | } |
571 | ||
d6a3cc2e | 572 | if (!skb) |
4438aca9 | 573 | wlvif->last_tx_hlid = 0; |
a8c0ddb5 AN |
574 | |
575 | return skb; | |
576 | } | |
577 | ||
a32d0cdf | 578 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) |
a8c0ddb5 | 579 | { |
990f5de7 | 580 | unsigned long flags; |
e4120df9 | 581 | struct wl12xx_vif *wlvif = wl->last_wlvif; |
990f5de7 IY |
582 | struct sk_buff *skb = NULL; |
583 | ||
49c9cd26 | 584 | /* continue from last wlvif (round robin) */ |
e4120df9 EP |
585 | if (wlvif) { |
586 | wl12xx_for_each_wlvif_continue(wl, wlvif) { | |
587 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
588 | if (skb) { | |
589 | wl->last_wlvif = wlvif; | |
590 | break; | |
591 | } | |
592 | } | |
593 | } | |
594 | ||
49c9cd26 AN |
595 | /* dequeue from the system HLID before the restarting wlvif list */ |
596 | if (!skb) | |
597 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]); | |
598 | ||
599 | /* do a new pass over the wlvif list */ | |
e4120df9 EP |
600 | if (!skb) { |
601 | wl12xx_for_each_wlvif(wl, wlvif) { | |
602 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
603 | if (skb) { | |
604 | wl->last_wlvif = wlvif; | |
605 | break; | |
606 | } | |
49c9cd26 AN |
607 | |
608 | /* | |
609 | * No need to continue after last_wlvif. The previous | |
610 | * pass should have found it. | |
611 | */ | |
612 | if (wlvif == wl->last_wlvif) | |
613 | break; | |
e4120df9 | 614 | } |
a32d0cdf EP |
615 | } |
616 | ||
990f5de7 IY |
617 | if (!skb && |
618 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
f1a46384 AN |
619 | int q; |
620 | ||
990f5de7 | 621 | skb = wl->dummy_packet; |
f1a46384 | 622 | q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
990f5de7 | 623 | spin_lock_irqsave(&wl->wl_lock, flags); |
6246ca00 | 624 | WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); |
f1a46384 | 625 | wl->tx_queue_count[q]--; |
990f5de7 IY |
626 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
627 | } | |
628 | ||
629 | return skb; | |
a8c0ddb5 AN |
630 | } |
631 | ||
d6a3cc2e | 632 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 | 633 | struct sk_buff *skb) |
6742f554 JO |
634 | { |
635 | unsigned long flags; | |
636 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
637 | ||
990f5de7 IY |
638 | if (wl12xx_is_dummy_packet(wl, skb)) { |
639 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
d6a3cc2e EP |
640 | } else { |
641 | u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); | |
a8c0ddb5 AN |
642 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); |
643 | ||
644 | /* make sure we dequeue the same packet next time */ | |
4438aca9 | 645 | wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) % |
d6a3cc2e | 646 | WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
647 | } |
648 | ||
6742f554 | 649 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 650 | wl->tx_queue_count[q]++; |
6742f554 JO |
651 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
652 | } | |
653 | ||
77ddaa10 EP |
654 | static bool wl1271_tx_is_data_present(struct sk_buff *skb) |
655 | { | |
656 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); | |
657 | ||
658 | return ieee80211_is_data_present(hdr->frame_control); | |
659 | } | |
660 | ||
9eb599e9 EP |
661 | void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids) |
662 | { | |
663 | struct wl12xx_vif *wlvif; | |
664 | u32 timeout; | |
665 | u8 hlid; | |
666 | ||
667 | if (!wl->conf.rx_streaming.interval) | |
668 | return; | |
669 | ||
670 | if (!wl->conf.rx_streaming.always && | |
671 | !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)) | |
672 | return; | |
673 | ||
674 | timeout = wl->conf.rx_streaming.duration; | |
675 | wl12xx_for_each_wlvif_sta(wl, wlvif) { | |
676 | bool found = false; | |
677 | for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) { | |
678 | if (test_bit(hlid, wlvif->links_map)) { | |
679 | found = true; | |
680 | break; | |
681 | } | |
682 | } | |
683 | ||
684 | if (!found) | |
685 | continue; | |
686 | ||
687 | /* enable rx streaming */ | |
0744bdb6 | 688 | if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags)) |
9eb599e9 EP |
689 | ieee80211_queue_work(wl->hw, |
690 | &wlvif->rx_streaming_enable_work); | |
691 | ||
692 | mod_timer(&wlvif->rx_streaming_timer, | |
693 | jiffies + msecs_to_jiffies(timeout)); | |
694 | } | |
695 | } | |
696 | ||
a32d0cdf | 697 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 698 | { |
a32d0cdf | 699 | struct wl12xx_vif *wlvif; |
f5fc0f86 | 700 | struct sk_buff *skb; |
9eb599e9 | 701 | struct wl1271_tx_hw_descr *desc; |
6c6e669e IY |
702 | u32 buf_offset = 0; |
703 | bool sent_packets = false; | |
9eb599e9 | 704 | unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0}; |
f5fc0f86 LC |
705 | int ret; |
706 | ||
f5fc0f86 | 707 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 708 | return; |
f5fc0f86 | 709 | |
a32d0cdf | 710 | while ((skb = wl1271_skb_dequeue(wl))) { |
0f168014 | 711 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9eb599e9 EP |
712 | bool has_data = false; |
713 | ||
a32d0cdf | 714 | wlvif = NULL; |
0f168014 EP |
715 | if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif) |
716 | wlvif = wl12xx_vif_to_data(info->control.vif); | |
a32d0cdf | 717 | |
9eb599e9 | 718 | has_data = wlvif && wl1271_tx_is_data_present(skb); |
a32d0cdf | 719 | ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset); |
6c6e669e | 720 | if (ret == -EAGAIN) { |
a19606b4 | 721 | /* |
6c6e669e IY |
722 | * Aggregation buffer is full. |
723 | * Flush buffer and try again. | |
724 | */ | |
d6a3cc2e | 725 | wl1271_skb_queue_head(wl, wlvif, skb); |
00782136 LC |
726 | wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf, |
727 | buf_offset, true); | |
6c6e669e IY |
728 | sent_packets = true; |
729 | buf_offset = 0; | |
730 | continue; | |
731 | } else if (ret == -EBUSY) { | |
732 | /* | |
733 | * Firmware buffer is full. | |
a19606b4 IY |
734 | * Queue back last skb, and stop aggregating. |
735 | */ | |
d6a3cc2e | 736 | wl1271_skb_queue_head(wl, wlvif, skb); |
a522550a IY |
737 | /* No work left, avoid scheduling redundant tx work */ |
738 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 739 | goto out_ack; |
f5fc0f86 | 740 | } else if (ret < 0) { |
5de8eef4 EP |
741 | if (wl12xx_is_dummy_packet(wl, skb)) |
742 | /* | |
743 | * fw still expects dummy packet, | |
744 | * so re-enqueue it | |
745 | */ | |
746 | wl1271_skb_queue_head(wl, wlvif, skb); | |
747 | else | |
748 | ieee80211_free_txskb(wl->hw, skb); | |
ffb591cd | 749 | goto out_ack; |
f5fc0f86 | 750 | } |
a19606b4 IY |
751 | buf_offset += ret; |
752 | wl->tx_packets_count++; | |
9eb599e9 EP |
753 | if (has_data) { |
754 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
755 | __set_bit(desc->hlid, active_hlids); | |
756 | } | |
f5fc0f86 LC |
757 | } |
758 | ||
ffb591cd | 759 | out_ack: |
a19606b4 | 760 | if (buf_offset) { |
00782136 LC |
761 | wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf, |
762 | buf_offset, true); | |
6c6e669e IY |
763 | sent_packets = true; |
764 | } | |
765 | if (sent_packets) { | |
606ea9fa IY |
766 | /* |
767 | * Interrupt the firmware with the new packets. This is only | |
768 | * required for older hardware revisions | |
769 | */ | |
6f7dd16c | 770 | if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) |
00782136 | 771 | wl1271_write32(wl, WL12XX_HOST_WR_ACCESS, |
606ea9fa IY |
772 | wl->tx_packets_count); |
773 | ||
a8c0ddb5 | 774 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 775 | } |
9eb599e9 | 776 | wl12xx_rearm_rx_streaming(wl, active_hlids); |
a522550a | 777 | } |
f5fc0f86 | 778 | |
a522550a IY |
779 | void wl1271_tx_work(struct work_struct *work) |
780 | { | |
781 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 782 | int ret; |
a522550a IY |
783 | |
784 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
785 | ret = wl1271_ps_elp_wakeup(wl); |
786 | if (ret < 0) | |
787 | goto out; | |
788 | ||
a32d0cdf | 789 | wl1271_tx_work_locked(wl); |
c1b193eb | 790 | |
c75bbcdb | 791 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 792 | out: |
f5fc0f86 LC |
793 | mutex_unlock(&wl->mutex); |
794 | } | |
795 | ||
d2e2d769 PF |
796 | static u8 wl1271_tx_get_rate_flags(u8 rate_class_index) |
797 | { | |
defe02c7 PF |
798 | u8 flags = 0; |
799 | ||
d2e2d769 PF |
800 | if (rate_class_index >= CONF_HW_RXTX_RATE_MCS_MIN && |
801 | rate_class_index <= CONF_HW_RXTX_RATE_MCS_MAX) | |
defe02c7 PF |
802 | flags |= IEEE80211_TX_RC_MCS; |
803 | if (rate_class_index == CONF_HW_RXTX_RATE_MCS7_SGI) | |
804 | flags |= IEEE80211_TX_RC_SHORT_GI; | |
805 | return flags; | |
d2e2d769 PF |
806 | } |
807 | ||
f5fc0f86 LC |
808 | static void wl1271_tx_complete_packet(struct wl1271 *wl, |
809 | struct wl1271_tx_hw_res_descr *result) | |
810 | { | |
f5fc0f86 | 811 | struct ieee80211_tx_info *info; |
48e93e40 EP |
812 | struct ieee80211_vif *vif; |
813 | struct wl12xx_vif *wlvif; | |
f5fc0f86 | 814 | struct sk_buff *skb; |
f5fc0f86 | 815 | int id = result->id; |
31627dc5 | 816 | int rate = -1; |
d2e2d769 | 817 | u8 rate_flags = 0; |
31627dc5 | 818 | u8 retries = 0; |
f5fc0f86 LC |
819 | |
820 | /* check for id legality */ | |
ffb591cd | 821 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
822 | wl1271_warning("TX result illegal id: %d", id); |
823 | return; | |
824 | } | |
825 | ||
826 | skb = wl->tx_frames[id]; | |
827 | info = IEEE80211_SKB_CB(skb); | |
828 | ||
990f5de7 | 829 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
830 | wl1271_free_tx_id(wl, id); |
831 | return; | |
832 | } | |
833 | ||
48e93e40 EP |
834 | /* info->control is valid as long as we don't update info->status */ |
835 | vif = info->control.vif; | |
836 | wlvif = wl12xx_vif_to_data(vif); | |
837 | ||
31627dc5 JO |
838 | /* update the TX status info */ |
839 | if (result->status == TX_SUCCESS) { | |
840 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 841 | info->flags |= IEEE80211_TX_STAT_ACK; |
1b92f15e EP |
842 | rate = wl1271_rate_to_idx(result->rate_class_index, |
843 | wlvif->band); | |
d2e2d769 | 844 | rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index); |
31627dc5 JO |
845 | retries = result->ack_failures; |
846 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
847 | wl->stats.excessive_retries++; | |
848 | retries = result->ack_failures; | |
f5fc0f86 LC |
849 | } |
850 | ||
31627dc5 JO |
851 | info->status.rates[0].idx = rate; |
852 | info->status.rates[0].count = retries; | |
d2e2d769 | 853 | info->status.rates[0].flags = rate_flags; |
31627dc5 JO |
854 | info->status.ack_signal = -1; |
855 | ||
f5fc0f86 LC |
856 | wl->stats.retry_count += result->ack_failures; |
857 | ||
b992c682 OK |
858 | /* |
859 | * update sequence number only when relevant, i.e. only in | |
860 | * sessions of TKIP, AES and GEM (not in open or WEP sessions) | |
861 | */ | |
862 | if (info->control.hw_key && | |
863 | (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || | |
864 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || | |
865 | info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { | |
866 | u8 fw_lsb = result->tx_security_sequence_number_lsb; | |
48e93e40 | 867 | u8 cur_lsb = wlvif->tx_security_last_seq_lsb; |
b992c682 OK |
868 | |
869 | /* | |
870 | * update security sequence number, taking care of potential | |
871 | * wrap-around | |
872 | */ | |
48e93e40 EP |
873 | wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff; |
874 | wlvif->tx_security_last_seq_lsb = fw_lsb; | |
b992c682 | 875 | } |
ac4e4ce5 | 876 | |
1e2b7976 JO |
877 | /* remove private header from packet */ |
878 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
879 | ||
880 | /* remove TKIP header space if present */ | |
f5fc0f86 | 881 | if (info->control.hw_key && |
97359d12 | 882 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 | 883 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
5ec8a448 EP |
884 | memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, |
885 | hdrlen); | |
886 | skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); | |
1e2b7976 | 887 | } |
f5fc0f86 LC |
888 | |
889 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
890 | " status 0x%x", | |
891 | result->id, skb, result->ack_failures, | |
892 | result->rate_class_index, result->status); | |
893 | ||
f5fc0f86 | 894 | /* return the packet to the stack */ |
a620865e | 895 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
92ef8960 | 896 | queue_work(wl->freezable_wq, &wl->netstack_work); |
25eeb9e3 | 897 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
898 | } |
899 | ||
900 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 901 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
902 | { |
903 | struct wl1271_acx_mem_map *memmap = | |
904 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 905 | u32 count, fw_counter; |
f5fc0f86 LC |
906 | u32 i; |
907 | ||
f5fc0f86 | 908 | /* read the tx results from the chipset */ |
7b048c52 TP |
909 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
910 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
911 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
912 | ||
913 | /* write host counter to chipset (to ack) */ | |
914 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
915 | offsetof(struct wl1271_tx_hw_res_if, | |
916 | tx_result_host_counter), fw_counter); | |
917 | ||
918 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 919 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
920 | |
921 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 922 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 923 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
924 | |
925 | /* process the results */ | |
926 | for (i = 0; i < count; i++) { | |
927 | struct wl1271_tx_hw_res_descr *result; | |
928 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
929 | ||
930 | /* process the packet */ | |
931 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
932 | wl1271_tx_complete_packet(wl, result); | |
933 | ||
934 | wl->tx_results_count++; | |
935 | } | |
f5fc0f86 LC |
936 | } |
937 | ||
a8c0ddb5 AN |
938 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
939 | { | |
940 | struct sk_buff *skb; | |
f1a46384 | 941 | int i; |
a8c0ddb5 | 942 | unsigned long flags; |
1d36cd89 | 943 | struct ieee80211_tx_info *info; |
f1a46384 | 944 | int total[NUM_TX_QUEUES]; |
a8c0ddb5 AN |
945 | |
946 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
f1a46384 | 947 | total[i] = 0; |
a8c0ddb5 AN |
948 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { |
949 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
79ebec76 AN |
950 | |
951 | if (!wl12xx_is_dummy_packet(wl, skb)) { | |
952 | info = IEEE80211_SKB_CB(skb); | |
953 | info->status.rates[0].idx = -1; | |
954 | info->status.rates[0].count = 0; | |
955 | ieee80211_tx_status_ni(wl->hw, skb); | |
956 | } | |
957 | ||
f1a46384 | 958 | total[i]++; |
a8c0ddb5 AN |
959 | } |
960 | } | |
961 | ||
962 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 AN |
963 | for (i = 0; i < NUM_TX_QUEUES; i++) |
964 | wl->tx_queue_count[i] -= total[i]; | |
a8c0ddb5 AN |
965 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
966 | ||
967 | wl1271_handle_tx_low_watermark(wl); | |
968 | } | |
969 | ||
7dece1c8 | 970 | /* caller must hold wl->mutex and TX must be stopped */ |
d6a3cc2e | 971 | void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
f5fc0f86 LC |
972 | { |
973 | int i; | |
f5fc0f86 LC |
974 | |
975 | /* TX failure */ | |
d6a3cc2e EP |
976 | for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) { |
977 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) | |
c7ffb902 | 978 | wl1271_free_sta(wl, wlvif, i); |
d6a3cc2e EP |
979 | else |
980 | wlvif->sta.ba_rx_bitmap = 0; | |
f1acea9a | 981 | |
d6a3cc2e EP |
982 | wl->links[i].allocated_pkts = 0; |
983 | wl->links[i].prev_freed_pkts = 0; | |
f5fc0f86 | 984 | } |
d6a3cc2e EP |
985 | wlvif->last_tx_hlid = 0; |
986 | ||
987 | } | |
988 | /* caller must hold wl->mutex and TX must be stopped */ | |
989 | void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues) | |
990 | { | |
991 | int i; | |
992 | struct sk_buff *skb; | |
993 | struct ieee80211_tx_info *info; | |
a8c0ddb5 | 994 | |
6246ca00 AN |
995 | /* only reset the queues if something bad happened */ |
996 | if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl) != 0)) { | |
997 | for (i = 0; i < WL12XX_MAX_LINKS; i++) | |
998 | wl1271_tx_reset_link_queues(wl, i); | |
999 | ||
1000 | for (i = 0; i < NUM_TX_QUEUES; i++) | |
1001 | wl->tx_queue_count[i] = 0; | |
1002 | } | |
f1acea9a | 1003 | |
708bb3cf | 1004 | wl->stopped_queues_map = 0; |
f5fc0f86 | 1005 | |
2fe33e8c IY |
1006 | /* |
1007 | * Make sure the driver is at a consistent state, in case this | |
1008 | * function is called from a context other than interface removal. | |
7dece1c8 | 1009 | * This call will always wake the TX queues. |
2fe33e8c | 1010 | */ |
7dece1c8 AN |
1011 | if (reset_tx_queues) |
1012 | wl1271_handle_tx_low_watermark(wl); | |
2fe33e8c | 1013 | |
50e9f746 IY |
1014 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
1015 | if (wl->tx_frames[i] == NULL) | |
1016 | continue; | |
1017 | ||
1018 | skb = wl->tx_frames[i]; | |
1019 | wl1271_free_tx_id(wl, i); | |
1020 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
1021 | ||
990f5de7 | 1022 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
1023 | /* |
1024 | * Remove private headers before passing the skb to | |
1025 | * mac80211 | |
1026 | */ | |
1027 | info = IEEE80211_SKB_CB(skb); | |
1028 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
1029 | if (info->control.hw_key && | |
1030 | info->control.hw_key->cipher == | |
1031 | WLAN_CIPHER_SUITE_TKIP) { | |
1032 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
5ec8a448 | 1033 | memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, |
ae47c45f | 1034 | skb->data, hdrlen); |
5ec8a448 | 1035 | skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); |
ae47c45f | 1036 | } |
50e9f746 | 1037 | |
ae47c45f SL |
1038 | info->status.rates[0].idx = -1; |
1039 | info->status.rates[0].count = 0; | |
50e9f746 | 1040 | |
c27d3acc | 1041 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 1042 | } |
50e9f746 | 1043 | } |
781608c4 JO |
1044 | } |
1045 | ||
1046 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
1047 | ||
1048 | /* caller must *NOT* hold wl->mutex */ | |
1049 | void wl1271_tx_flush(struct wl1271 *wl) | |
1050 | { | |
1051 | unsigned long timeout; | |
18aa755b | 1052 | int i; |
781608c4 JO |
1053 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); |
1054 | ||
1055 | while (!time_after(jiffies, timeout)) { | |
1056 | mutex_lock(&wl->mutex); | |
a8c0ddb5 | 1057 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
f1a46384 AN |
1058 | wl->tx_frames_cnt, |
1059 | wl1271_tx_total_queue_count(wl)); | |
1060 | if ((wl->tx_frames_cnt == 0) && | |
1061 | (wl1271_tx_total_queue_count(wl) == 0)) { | |
781608c4 JO |
1062 | mutex_unlock(&wl->mutex); |
1063 | return; | |
1064 | } | |
1065 | mutex_unlock(&wl->mutex); | |
1066 | msleep(1); | |
1067 | } | |
1068 | ||
1069 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
18aa755b AN |
1070 | |
1071 | /* forcibly flush all Tx buffers on our queues */ | |
1072 | mutex_lock(&wl->mutex); | |
1073 | for (i = 0; i < WL12XX_MAX_LINKS; i++) | |
1074 | wl1271_tx_reset_link_queues(wl, i); | |
1075 | mutex_unlock(&wl->mutex); | |
f5fc0f86 | 1076 | } |
e0fe371b | 1077 | |
af7fbb28 | 1078 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) |
e0fe371b | 1079 | { |
af7fbb28 EP |
1080 | if (WARN_ON(!rate_set)) |
1081 | return 0; | |
e0fe371b | 1082 | |
af7fbb28 | 1083 | return BIT(__ffs(rate_set)); |
e0fe371b | 1084 | } |