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 | 28 | #include "wl12xx.h" |
0f4e3122 | 29 | #include "debug.h" |
00d20100 SL |
30 | #include "io.h" |
31 | #include "reg.h" | |
32 | #include "ps.h" | |
33 | #include "tx.h" | |
56d4f8f6 | 34 | #include "event.h" |
f5fc0f86 | 35 | |
536129c8 EP |
36 | static int wl1271_set_default_wep_key(struct wl1271 *wl, |
37 | struct wl12xx_vif *wlvif, u8 id) | |
7f179b46 AN |
38 | { |
39 | int ret; | |
536129c8 | 40 | bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS); |
7f179b46 AN |
41 | |
42 | if (is_ap) | |
c690ec81 | 43 | ret = wl12xx_cmd_set_default_wep_key(wl, id, |
a8ab39a4 | 44 | wlvif->ap.bcast_hlid); |
7f179b46 | 45 | else |
154da67c | 46 | ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid); |
7f179b46 AN |
47 | |
48 | if (ret < 0) | |
49 | return ret; | |
50 | ||
51 | wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); | |
52 | return 0; | |
53 | } | |
54 | ||
25eeb9e3 | 55 | static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) |
f5fc0f86 | 56 | { |
25eeb9e3 IY |
57 | int id; |
58 | ||
59 | id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS); | |
60 | if (id >= ACX_TX_DESCRIPTORS) | |
61 | return -EBUSY; | |
62 | ||
63 | __set_bit(id, wl->tx_frames_map); | |
64 | wl->tx_frames[id] = skb; | |
65 | wl->tx_frames_cnt++; | |
66 | return id; | |
67 | } | |
f5fc0f86 | 68 | |
25eeb9e3 IY |
69 | static void wl1271_free_tx_id(struct wl1271 *wl, int id) |
70 | { | |
71 | if (__test_and_clear_bit(id, wl->tx_frames_map)) { | |
ef2e3004 IY |
72 | if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS)) |
73 | clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
74 | ||
25eeb9e3 IY |
75 | wl->tx_frames[id] = NULL; |
76 | wl->tx_frames_cnt--; | |
77 | } | |
f5fc0f86 LC |
78 | } |
79 | ||
99a2775d AN |
80 | static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, |
81 | struct sk_buff *skb) | |
82 | { | |
83 | struct ieee80211_hdr *hdr; | |
84 | ||
85 | /* | |
86 | * add the station to the known list before transmitting the | |
87 | * authentication response. this way it won't get de-authed by FW | |
88 | * when transmitting too soon. | |
89 | */ | |
90 | hdr = (struct ieee80211_hdr *)(skb->data + | |
91 | sizeof(struct wl1271_tx_hw_descr)); | |
92 | if (ieee80211_is_auth(hdr->frame_control)) | |
93 | wl1271_acx_set_inconnection_sta(wl, hdr->addr1); | |
94 | } | |
95 | ||
c7ffb902 EP |
96 | static void wl1271_tx_regulate_link(struct wl1271 *wl, |
97 | struct wl12xx_vif *wlvif, | |
98 | u8 hlid) | |
b622d992 | 99 | { |
da03209e | 100 | bool fw_ps, single_sta; |
9b17f1b3 | 101 | u8 tx_pkts; |
b622d992 | 102 | |
c7ffb902 | 103 | if (WARN_ON(!test_bit(hlid, wlvif->links_map))) |
b622d992 AN |
104 | return; |
105 | ||
106 | fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map); | |
9b17f1b3 | 107 | tx_pkts = wl->links[hlid].allocated_pkts; |
da03209e | 108 | single_sta = (wl->active_sta_count == 1); |
b622d992 AN |
109 | |
110 | /* | |
111 | * if in FW PS and there is enough data in FW we can put the link | |
112 | * into high-level PS and clean out its TX queues. | |
da03209e AN |
113 | * Make an exception if this is the only connected station. In this |
114 | * case FW-memory congestion is not a problem. | |
b622d992 | 115 | */ |
da03209e | 116 | if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS) |
6e8cd331 | 117 | wl12xx_ps_link_start(wl, wlvif, hlid, true); |
b622d992 AN |
118 | } |
119 | ||
f8e0af6b | 120 | bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) |
f4df1bd5 EP |
121 | { |
122 | return wl->dummy_packet == skb; | |
123 | } | |
124 | ||
a8ab39a4 EP |
125 | u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
126 | struct sk_buff *skb) | |
a8c0ddb5 AN |
127 | { |
128 | struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb); | |
129 | ||
130 | if (control->control.sta) { | |
131 | struct wl1271_station *wl_sta; | |
132 | ||
133 | wl_sta = (struct wl1271_station *) | |
134 | control->control.sta->drv_priv; | |
135 | return wl_sta->hlid; | |
136 | } else { | |
137 | struct ieee80211_hdr *hdr; | |
138 | ||
53d40d0b | 139 | if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags)) |
f4df1bd5 EP |
140 | return wl->system_hlid; |
141 | ||
a8c0ddb5 AN |
142 | hdr = (struct ieee80211_hdr *)skb->data; |
143 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
a8ab39a4 | 144 | return wlvif->ap.global_hlid; |
a8c0ddb5 | 145 | else |
a8ab39a4 | 146 | return wlvif->ap.bcast_hlid; |
a8c0ddb5 AN |
147 | } |
148 | } | |
149 | ||
d6a3cc2e EP |
150 | u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
151 | struct sk_buff *skb) | |
f4df1bd5 | 152 | { |
df4c849f EP |
153 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
154 | ||
0f168014 | 155 | if (!wlvif || wl12xx_is_dummy_packet(wl, skb)) |
f4df1bd5 EP |
156 | return wl->system_hlid; |
157 | ||
536129c8 | 158 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) |
a8ab39a4 | 159 | return wl12xx_tx_get_hlid_ap(wl, wlvif, skb); |
f4df1bd5 | 160 | |
ba8447f6 | 161 | if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) || |
eee514e3 | 162 | test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) && |
df4c849f EP |
163 | !ieee80211_is_auth(hdr->frame_control) && |
164 | !ieee80211_is_assoc_req(hdr->frame_control)) | |
154da67c | 165 | return wlvif->sta.hlid; |
f4df1bd5 | 166 | else |
afaf8bdb | 167 | return wlvif->dev_hlid; |
f4df1bd5 EP |
168 | } |
169 | ||
0da13da7 IY |
170 | static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl, |
171 | unsigned int packet_length) | |
172 | { | |
ce39defb | 173 | if (wl->quirks & WL12XX_QUIRK_NO_BLOCKSIZE_ALIGNMENT) |
0da13da7 | 174 | return ALIGN(packet_length, WL1271_TX_ALIGN_TO); |
ce39defb LC |
175 | else |
176 | return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); | |
0da13da7 IY |
177 | } |
178 | ||
a32d0cdf | 179 | static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
180 | struct sk_buff *skb, u32 extra, u32 buf_offset, |
181 | u8 hlid) | |
f5fc0f86 LC |
182 | { |
183 | struct wl1271_tx_hw_descr *desc; | |
184 | u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; | |
48a61477 | 185 | u32 len; |
5c9417f1 | 186 | u32 total_blocks; |
742246f8 | 187 | int id, ret = -EBUSY, ac; |
e9eb8cbe | 188 | u32 spare_blocks = wl->tx_spare_blocks; |
a32d0cdf | 189 | bool is_dummy = false; |
f5fc0f86 | 190 | |
a19606b4 | 191 | if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE) |
6c6e669e | 192 | return -EAGAIN; |
a19606b4 | 193 | |
f5fc0f86 | 194 | /* allocate free identifier for the packet */ |
25eeb9e3 | 195 | id = wl1271_alloc_tx_id(wl, skb); |
f5fc0f86 LC |
196 | if (id < 0) |
197 | return id; | |
198 | ||
199 | /* approximate the number of blocks required for this packet | |
200 | in the firmware */ | |
0da13da7 | 201 | len = wl12xx_calc_packet_alignment(wl, total_len); |
48a61477 | 202 | |
e9eb8cbe | 203 | /* in case of a dummy packet, use default amount of spare mem blocks */ |
a32d0cdf EP |
204 | if (unlikely(wl12xx_is_dummy_packet(wl, skb))) { |
205 | is_dummy = true; | |
e9eb8cbe | 206 | spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT; |
a32d0cdf | 207 | } |
e9eb8cbe | 208 | |
48a61477 | 209 | total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE + |
e7ddf549 | 210 | spare_blocks; |
48a61477 | 211 | |
f5fc0f86 LC |
212 | if (total_blocks <= wl->tx_blocks_available) { |
213 | desc = (struct wl1271_tx_hw_descr *)skb_push( | |
214 | skb, total_len - skb->len); | |
215 | ||
ae77eccf SL |
216 | /* HW descriptor fields change between wl127x and wl128x */ |
217 | if (wl->chip.id == CHIP_ID_1283_PG20) { | |
218 | desc->wl128x_mem.total_mem_blocks = total_blocks; | |
219 | } else { | |
e7ddf549 | 220 | desc->wl127x_mem.extra_blocks = spare_blocks; |
ae77eccf SL |
221 | desc->wl127x_mem.total_mem_blocks = total_blocks; |
222 | } | |
223 | ||
f5fc0f86 LC |
224 | desc->id = id; |
225 | ||
226 | wl->tx_blocks_available -= total_blocks; | |
7bb5d6ce | 227 | wl->tx_allocated_blocks += total_blocks; |
f5fc0f86 | 228 | |
55df5afb AN |
229 | /* If the FW was empty before, arm the Tx watchdog */ |
230 | if (wl->tx_allocated_blocks == total_blocks) | |
231 | wl12xx_rearm_tx_watchdog_locked(wl); | |
232 | ||
742246f8 AN |
233 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
234 | wl->tx_allocated_pkts[ac]++; | |
bf54e301 | 235 | |
0f168014 EP |
236 | if (!is_dummy && wlvif && |
237 | wlvif->bss_type == BSS_TYPE_AP_BSS && | |
c7ffb902 | 238 | test_bit(hlid, wlvif->ap.sta_hlid_map)) |
9b17f1b3 | 239 | wl->links[hlid].allocated_pkts++; |
09039f42 | 240 | |
f5fc0f86 LC |
241 | ret = 0; |
242 | ||
243 | wl1271_debug(DEBUG_TX, | |
244 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
245 | total_len, total_blocks, id); | |
781608c4 | 246 | } else { |
25eeb9e3 | 247 | wl1271_free_tx_id(wl, id); |
781608c4 | 248 | } |
f5fc0f86 LC |
249 | |
250 | return ret; | |
251 | } | |
252 | ||
a32d0cdf | 253 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
254 | struct sk_buff *skb, u32 extra, |
255 | struct ieee80211_tx_info *control, u8 hlid) | |
f5fc0f86 | 256 | { |
ac5e1e39 | 257 | struct timespec ts; |
f5fc0f86 | 258 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 259 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 260 | s64 hosttime; |
cf00f379 | 261 | u16 tx_attr = 0; |
f4f57943 EP |
262 | __le16 frame_control; |
263 | struct ieee80211_hdr *hdr; | |
264 | u8 *frame_start; | |
a32d0cdf | 265 | bool is_dummy; |
f5fc0f86 LC |
266 | |
267 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
f4f57943 EP |
268 | frame_start = (u8 *)(desc + 1); |
269 | hdr = (struct ieee80211_hdr *)(frame_start + extra); | |
270 | frame_control = hdr->frame_control; | |
f5fc0f86 | 271 | |
1e2b7976 JO |
272 | /* relocate space for security header */ |
273 | if (extra) { | |
f4f57943 EP |
274 | int hdrlen = ieee80211_hdrlen(frame_control); |
275 | memmove(frame_start, hdr, hdrlen); | |
1e2b7976 JO |
276 | } |
277 | ||
f5fc0f86 | 278 | /* configure packet life time */ |
ac5e1e39 JO |
279 | getnstimeofday(&ts); |
280 | hosttime = (timespec_to_ns(&ts) >> 10); | |
281 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d | 282 | |
a32d0cdf | 283 | is_dummy = wl12xx_is_dummy_packet(wl, skb); |
0f168014 | 284 | if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS) |
c6c8a65d AN |
285 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); |
286 | else | |
287 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 288 | |
db674d24 | 289 | /* queue */ |
c6999d83 | 290 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 291 | desc->tid = skb->priority; |
c6c8a65d | 292 | |
a32d0cdf | 293 | if (is_dummy) { |
ae47c45f SL |
294 | /* |
295 | * FW expects the dummy packet to have an invalid session id - | |
296 | * any session id that is different than the one set in the join | |
297 | */ | |
98b86253 | 298 | tx_attr = (SESSION_COUNTER_INVALID << |
ae47c45f SL |
299 | TX_HW_ATTR_OFST_SESSION_COUNTER) & |
300 | TX_HW_ATTR_SESSION_COUNTER; | |
301 | ||
302 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
0f168014 | 303 | } else if (wlvif) { |
ae47c45f | 304 | /* configure the tx attributes */ |
98b86253 EP |
305 | tx_attr = wlvif->session_counter << |
306 | TX_HW_ATTR_OFST_SESSION_COUNTER; | |
ae47c45f SL |
307 | } |
308 | ||
79b122dc | 309 | desc->hlid = hlid; |
0f168014 | 310 | if (is_dummy || !wlvif) |
a32d0cdf EP |
311 | rate_idx = 0; |
312 | else if (wlvif->bss_type != BSS_TYPE_AP_BSS) { | |
c6c8a65d AN |
313 | /* if the packets are destined for AP (have a STA entry) |
314 | send them with AP rate policies, otherwise use default | |
315 | basic rates */ | |
8a0f2ee3 EP |
316 | if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE) |
317 | rate_idx = wlvif->sta.p2p_rate_idx; | |
318 | else if (control->control.sta) | |
e5a359f8 | 319 | rate_idx = wlvif->sta.ap_rate_idx; |
c6c8a65d | 320 | else |
e5a359f8 | 321 | rate_idx = wlvif->sta.basic_rate_idx; |
c6c8a65d | 322 | } else { |
a8ab39a4 | 323 | if (hlid == wlvif->ap.global_hlid) |
e5a359f8 | 324 | rate_idx = wlvif->ap.mgmt_rate_idx; |
a8ab39a4 | 325 | else if (hlid == wlvif->ap.bcast_hlid) |
e5a359f8 | 326 | rate_idx = wlvif->ap.bcast_rate_idx; |
e51ae9be | 327 | else |
e5a359f8 | 328 | rate_idx = wlvif->ap.ucast_rate_idx[ac]; |
c6c8a65d AN |
329 | } |
330 | ||
331 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
332 | desc->reserved = 0; |
333 | ||
0da13da7 | 334 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 335 | |
0da13da7 | 336 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
337 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
338 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
339 | |
340 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
341 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
342 | desc->hlid, tx_attr, | |
343 | le16_to_cpu(desc->length), | |
344 | le16_to_cpu(desc->life_time), | |
345 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
346 | } else { |
347 | int pad; | |
348 | ||
0da13da7 | 349 | /* Store the aligned length in terms of words */ |
48a61477 SL |
350 | desc->length = cpu_to_le16(aligned_len >> 2); |
351 | ||
352 | /* calculate number of padding bytes */ | |
353 | pad = aligned_len - skb->len; | |
354 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 355 | |
ae77eccf SL |
356 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
357 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
358 | desc->hlid, tx_attr, | |
359 | le16_to_cpu(desc->length), | |
360 | le16_to_cpu(desc->life_time), | |
361 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 362 | } |
d0f63b20 | 363 | |
f4f57943 EP |
364 | /* for WEP shared auth - no fw encryption is needed */ |
365 | if (ieee80211_is_auth(frame_control) && | |
366 | ieee80211_has_protected(frame_control)) | |
367 | tx_attr |= TX_HW_ATTR_HOST_ENCRYPT; | |
368 | ||
d0f63b20 | 369 | desc->tx_attr = cpu_to_le16(tx_attr); |
f5fc0f86 LC |
370 | } |
371 | ||
372 | /* caller must hold wl->mutex */ | |
a32d0cdf EP |
373 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
374 | struct sk_buff *skb, u32 buf_offset) | |
f5fc0f86 LC |
375 | { |
376 | struct ieee80211_tx_info *info; | |
377 | u32 extra = 0; | |
378 | int ret = 0; | |
a19606b4 | 379 | u32 total_len; |
09039f42 | 380 | u8 hlid; |
536129c8 | 381 | bool is_dummy; |
f5fc0f86 LC |
382 | |
383 | if (!skb) | |
384 | return -EINVAL; | |
385 | ||
386 | info = IEEE80211_SKB_CB(skb); | |
387 | ||
536129c8 EP |
388 | /* TODO: handle dummy packets on multi-vifs */ |
389 | is_dummy = wl12xx_is_dummy_packet(wl, skb); | |
536129c8 | 390 | |
f5fc0f86 | 391 | if (info->control.hw_key && |
97359d12 | 392 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
5ec8a448 | 393 | extra = WL1271_EXTRA_SPACE_TKIP; |
f5fc0f86 LC |
394 | |
395 | if (info->control.hw_key) { | |
7f179b46 AN |
396 | bool is_wep; |
397 | u8 idx = info->control.hw_key->hw_key_idx; | |
398 | u32 cipher = info->control.hw_key->cipher; | |
399 | ||
400 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
401 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 402 | |
f75c753f | 403 | if (unlikely(is_wep && wlvif->default_key != idx)) { |
536129c8 | 404 | ret = wl1271_set_default_wep_key(wl, wlvif, idx); |
f5fc0f86 LC |
405 | if (ret < 0) |
406 | return ret; | |
f75c753f | 407 | wlvif->default_key = idx; |
f5fc0f86 LC |
408 | } |
409 | } | |
d6a3cc2e | 410 | hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); |
79b122dc | 411 | if (hlid == WL12XX_INVALID_LINK_ID) { |
e0d62536 | 412 | wl1271_error("invalid hlid. dropping skb 0x%p", skb); |
79b122dc EP |
413 | return -EINVAL; |
414 | } | |
09039f42 | 415 | |
a32d0cdf | 416 | ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid); |
f5fc0f86 LC |
417 | if (ret < 0) |
418 | return ret; | |
419 | ||
a32d0cdf | 420 | wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid); |
fae2fd76 | 421 | |
0f168014 | 422 | if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 423 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
c7ffb902 | 424 | wl1271_tx_regulate_link(wl, wlvif, hlid); |
b622d992 | 425 | } |
99a2775d | 426 | |
a19606b4 | 427 | /* |
48a61477 SL |
428 | * The length of each packet is stored in terms of |
429 | * words. Thus, we must pad the skb data to make sure its | |
430 | * length is aligned. The number of padding bytes is computed | |
431 | * and set in wl1271_tx_fill_hdr. | |
432 | * In special cases, we want to align to a specific block size | |
433 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 434 | */ |
0da13da7 | 435 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 436 | |
a19606b4 IY |
437 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
438 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 439 | |
990f5de7 | 440 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
536129c8 | 441 | if (is_dummy) |
990f5de7 IY |
442 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); |
443 | ||
a19606b4 | 444 | return total_len; |
f5fc0f86 LC |
445 | } |
446 | ||
af7fbb28 EP |
447 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, |
448 | enum ieee80211_band rate_band) | |
830fb67b JO |
449 | { |
450 | struct ieee80211_supported_band *band; | |
451 | u32 enabled_rates = 0; | |
452 | int bit; | |
453 | ||
af7fbb28 | 454 | band = wl->hw->wiphy->bands[rate_band]; |
830fb67b JO |
455 | for (bit = 0; bit < band->n_bitrates; bit++) { |
456 | if (rate_set & 0x1) | |
457 | enabled_rates |= band->bitrates[bit].hw_value; | |
458 | rate_set >>= 1; | |
459 | } | |
460 | ||
18357850 SL |
461 | /* MCS rates indication are on bits 16 - 23 */ |
462 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
463 | ||
464 | for (bit = 0; bit < 8; bit++) { | |
465 | if (rate_set & 0x1) | |
466 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
467 | rate_set >>= 1; | |
468 | } | |
18357850 | 469 | |
830fb67b JO |
470 | return enabled_rates; |
471 | } | |
472 | ||
a8c0ddb5 | 473 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
474 | { |
475 | unsigned long flags; | |
708bb3cf | 476 | int i; |
2fe33e8c | 477 | |
708bb3cf AN |
478 | for (i = 0; i < NUM_TX_QUEUES; i++) { |
479 | if (test_bit(i, &wl->stopped_queues_map) && | |
f1a46384 | 480 | wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
708bb3cf AN |
481 | /* firmware buffer has space, restart queues */ |
482 | spin_lock_irqsave(&wl->wl_lock, flags); | |
483 | ieee80211_wake_queue(wl->hw, | |
484 | wl1271_tx_get_mac80211_queue(i)); | |
485 | clear_bit(i, &wl->stopped_queues_map); | |
486 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
487 | } | |
2fe33e8c IY |
488 | } |
489 | } | |
490 | ||
742246f8 AN |
491 | static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl, |
492 | struct sk_buff_head *queues) | |
493 | { | |
494 | int i, q = -1, ac; | |
495 | u32 min_pkts = 0xffffffff; | |
496 | ||
497 | /* | |
498 | * Find a non-empty ac where: | |
499 | * 1. There are packets to transmit | |
500 | * 2. The FW has the least allocated blocks | |
501 | * | |
502 | * We prioritize the ACs according to VO>VI>BE>BK | |
503 | */ | |
504 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
505 | ac = wl1271_tx_get_queue(i); | |
506 | if (!skb_queue_empty(&queues[ac]) && | |
507 | (wl->tx_allocated_pkts[ac] < min_pkts)) { | |
508 | q = ac; | |
509 | min_pkts = wl->tx_allocated_pkts[q]; | |
510 | } | |
511 | } | |
512 | ||
513 | if (q == -1) | |
514 | return NULL; | |
515 | ||
516 | return &queues[q]; | |
517 | } | |
518 | ||
d6a3cc2e EP |
519 | static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl, |
520 | struct wl1271_link *lnk) | |
6742f554 | 521 | { |
d6a3cc2e | 522 | struct sk_buff *skb; |
6742f554 | 523 | unsigned long flags; |
742246f8 | 524 | struct sk_buff_head *queue; |
6742f554 | 525 | |
d6a3cc2e | 526 | queue = wl1271_select_queue(wl, lnk->tx_queue); |
742246f8 | 527 | if (!queue) |
d6a3cc2e | 528 | return NULL; |
742246f8 AN |
529 | |
530 | skb = skb_dequeue(queue); | |
6742f554 | 531 | if (skb) { |
f1a46384 | 532 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
6742f554 | 533 | spin_lock_irqsave(&wl->wl_lock, flags); |
6246ca00 | 534 | WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); |
f1a46384 | 535 | wl->tx_queue_count[q]--; |
6742f554 JO |
536 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
537 | } | |
538 | ||
539 | return skb; | |
540 | } | |
541 | ||
d6a3cc2e EP |
542 | static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl, |
543 | struct wl12xx_vif *wlvif) | |
a8c0ddb5 AN |
544 | { |
545 | struct sk_buff *skb = NULL; | |
a8c0ddb5 AN |
546 | int i, h, start_hlid; |
547 | ||
548 | /* start from the link after the last one */ | |
4438aca9 | 549 | start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
550 | |
551 | /* dequeue according to AC, round robin on each link */ | |
c7ffb902 EP |
552 | for (i = 0; i < WL12XX_MAX_LINKS; i++) { |
553 | h = (start_hlid + i) % WL12XX_MAX_LINKS; | |
a8c0ddb5 | 554 | |
742246f8 | 555 | /* only consider connected stations */ |
c7ffb902 | 556 | if (!test_bit(h, wlvif->links_map)) |
742246f8 AN |
557 | continue; |
558 | ||
d6a3cc2e EP |
559 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]); |
560 | if (!skb) | |
742246f8 AN |
561 | continue; |
562 | ||
d6a3cc2e EP |
563 | wlvif->last_tx_hlid = h; |
564 | break; | |
a8c0ddb5 AN |
565 | } |
566 | ||
d6a3cc2e | 567 | if (!skb) |
4438aca9 | 568 | wlvif->last_tx_hlid = 0; |
a8c0ddb5 AN |
569 | |
570 | return skb; | |
571 | } | |
572 | ||
a32d0cdf | 573 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) |
a8c0ddb5 | 574 | { |
990f5de7 | 575 | unsigned long flags; |
e4120df9 | 576 | struct wl12xx_vif *wlvif = wl->last_wlvif; |
990f5de7 IY |
577 | struct sk_buff *skb = NULL; |
578 | ||
49c9cd26 | 579 | /* continue from last wlvif (round robin) */ |
e4120df9 EP |
580 | if (wlvif) { |
581 | wl12xx_for_each_wlvif_continue(wl, wlvif) { | |
582 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
583 | if (skb) { | |
584 | wl->last_wlvif = wlvif; | |
585 | break; | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
49c9cd26 AN |
590 | /* dequeue from the system HLID before the restarting wlvif list */ |
591 | if (!skb) | |
592 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]); | |
593 | ||
594 | /* do a new pass over the wlvif list */ | |
e4120df9 EP |
595 | if (!skb) { |
596 | wl12xx_for_each_wlvif(wl, wlvif) { | |
597 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
598 | if (skb) { | |
599 | wl->last_wlvif = wlvif; | |
600 | break; | |
601 | } | |
49c9cd26 AN |
602 | |
603 | /* | |
604 | * No need to continue after last_wlvif. The previous | |
605 | * pass should have found it. | |
606 | */ | |
607 | if (wlvif == wl->last_wlvif) | |
608 | break; | |
e4120df9 | 609 | } |
a32d0cdf EP |
610 | } |
611 | ||
990f5de7 IY |
612 | if (!skb && |
613 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
f1a46384 AN |
614 | int q; |
615 | ||
990f5de7 | 616 | skb = wl->dummy_packet; |
f1a46384 | 617 | q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
990f5de7 | 618 | spin_lock_irqsave(&wl->wl_lock, flags); |
6246ca00 | 619 | WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); |
f1a46384 | 620 | wl->tx_queue_count[q]--; |
990f5de7 IY |
621 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
622 | } | |
623 | ||
624 | return skb; | |
a8c0ddb5 AN |
625 | } |
626 | ||
d6a3cc2e | 627 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 | 628 | struct sk_buff *skb) |
6742f554 JO |
629 | { |
630 | unsigned long flags; | |
631 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
632 | ||
990f5de7 IY |
633 | if (wl12xx_is_dummy_packet(wl, skb)) { |
634 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
d6a3cc2e EP |
635 | } else { |
636 | u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); | |
a8c0ddb5 AN |
637 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); |
638 | ||
639 | /* make sure we dequeue the same packet next time */ | |
4438aca9 | 640 | wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) % |
d6a3cc2e | 641 | WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
642 | } |
643 | ||
6742f554 | 644 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 645 | wl->tx_queue_count[q]++; |
6742f554 JO |
646 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
647 | } | |
648 | ||
77ddaa10 EP |
649 | static bool wl1271_tx_is_data_present(struct sk_buff *skb) |
650 | { | |
651 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); | |
652 | ||
653 | return ieee80211_is_data_present(hdr->frame_control); | |
654 | } | |
655 | ||
9eb599e9 EP |
656 | void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids) |
657 | { | |
658 | struct wl12xx_vif *wlvif; | |
659 | u32 timeout; | |
660 | u8 hlid; | |
661 | ||
662 | if (!wl->conf.rx_streaming.interval) | |
663 | return; | |
664 | ||
665 | if (!wl->conf.rx_streaming.always && | |
666 | !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)) | |
667 | return; | |
668 | ||
669 | timeout = wl->conf.rx_streaming.duration; | |
670 | wl12xx_for_each_wlvif_sta(wl, wlvif) { | |
671 | bool found = false; | |
672 | for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) { | |
673 | if (test_bit(hlid, wlvif->links_map)) { | |
674 | found = true; | |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
679 | if (!found) | |
680 | continue; | |
681 | ||
682 | /* enable rx streaming */ | |
0744bdb6 | 683 | if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags)) |
9eb599e9 EP |
684 | ieee80211_queue_work(wl->hw, |
685 | &wlvif->rx_streaming_enable_work); | |
686 | ||
687 | mod_timer(&wlvif->rx_streaming_timer, | |
688 | jiffies + msecs_to_jiffies(timeout)); | |
689 | } | |
690 | } | |
691 | ||
a32d0cdf | 692 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 693 | { |
a32d0cdf | 694 | struct wl12xx_vif *wlvif; |
f5fc0f86 | 695 | struct sk_buff *skb; |
9eb599e9 | 696 | struct wl1271_tx_hw_descr *desc; |
6c6e669e IY |
697 | u32 buf_offset = 0; |
698 | bool sent_packets = false; | |
9eb599e9 | 699 | unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0}; |
f5fc0f86 LC |
700 | int ret; |
701 | ||
f5fc0f86 | 702 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 703 | return; |
f5fc0f86 | 704 | |
a32d0cdf | 705 | while ((skb = wl1271_skb_dequeue(wl))) { |
0f168014 | 706 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9eb599e9 EP |
707 | bool has_data = false; |
708 | ||
a32d0cdf | 709 | wlvif = NULL; |
0f168014 EP |
710 | if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif) |
711 | wlvif = wl12xx_vif_to_data(info->control.vif); | |
a32d0cdf | 712 | |
9eb599e9 | 713 | has_data = wlvif && wl1271_tx_is_data_present(skb); |
a32d0cdf | 714 | ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset); |
6c6e669e | 715 | if (ret == -EAGAIN) { |
a19606b4 | 716 | /* |
6c6e669e IY |
717 | * Aggregation buffer is full. |
718 | * Flush buffer and try again. | |
719 | */ | |
d6a3cc2e | 720 | wl1271_skb_queue_head(wl, wlvif, skb); |
6c6e669e | 721 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 722 | buf_offset, true); |
6c6e669e IY |
723 | sent_packets = true; |
724 | buf_offset = 0; | |
725 | continue; | |
726 | } else if (ret == -EBUSY) { | |
727 | /* | |
728 | * Firmware buffer is full. | |
a19606b4 IY |
729 | * Queue back last skb, and stop aggregating. |
730 | */ | |
d6a3cc2e | 731 | wl1271_skb_queue_head(wl, wlvif, skb); |
a522550a IY |
732 | /* No work left, avoid scheduling redundant tx work */ |
733 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 734 | goto out_ack; |
f5fc0f86 | 735 | } else if (ret < 0) { |
5de8eef4 EP |
736 | if (wl12xx_is_dummy_packet(wl, skb)) |
737 | /* | |
738 | * fw still expects dummy packet, | |
739 | * so re-enqueue it | |
740 | */ | |
741 | wl1271_skb_queue_head(wl, wlvif, skb); | |
742 | else | |
743 | ieee80211_free_txskb(wl->hw, skb); | |
ffb591cd | 744 | goto out_ack; |
f5fc0f86 | 745 | } |
a19606b4 IY |
746 | buf_offset += ret; |
747 | wl->tx_packets_count++; | |
9eb599e9 EP |
748 | if (has_data) { |
749 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
750 | __set_bit(desc->hlid, active_hlids); | |
751 | } | |
f5fc0f86 LC |
752 | } |
753 | ||
ffb591cd | 754 | out_ack: |
a19606b4 IY |
755 | if (buf_offset) { |
756 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
757 | buf_offset, true); | |
6c6e669e IY |
758 | sent_packets = true; |
759 | } | |
760 | if (sent_packets) { | |
606ea9fa IY |
761 | /* |
762 | * Interrupt the firmware with the new packets. This is only | |
763 | * required for older hardware revisions | |
764 | */ | |
765 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
766 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
767 | wl->tx_packets_count); | |
768 | ||
a8c0ddb5 | 769 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 770 | } |
9eb599e9 | 771 | wl12xx_rearm_rx_streaming(wl, active_hlids); |
a522550a | 772 | } |
f5fc0f86 | 773 | |
a522550a IY |
774 | void wl1271_tx_work(struct work_struct *work) |
775 | { | |
776 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 777 | int ret; |
a522550a IY |
778 | |
779 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
780 | ret = wl1271_ps_elp_wakeup(wl); |
781 | if (ret < 0) | |
782 | goto out; | |
783 | ||
a32d0cdf | 784 | wl1271_tx_work_locked(wl); |
c1b193eb | 785 | |
c75bbcdb | 786 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 787 | out: |
f5fc0f86 LC |
788 | mutex_unlock(&wl->mutex); |
789 | } | |
790 | ||
d2e2d769 PF |
791 | static u8 wl1271_tx_get_rate_flags(u8 rate_class_index) |
792 | { | |
defe02c7 PF |
793 | u8 flags = 0; |
794 | ||
d2e2d769 PF |
795 | if (rate_class_index >= CONF_HW_RXTX_RATE_MCS_MIN && |
796 | rate_class_index <= CONF_HW_RXTX_RATE_MCS_MAX) | |
defe02c7 PF |
797 | flags |= IEEE80211_TX_RC_MCS; |
798 | if (rate_class_index == CONF_HW_RXTX_RATE_MCS7_SGI) | |
799 | flags |= IEEE80211_TX_RC_SHORT_GI; | |
800 | return flags; | |
d2e2d769 PF |
801 | } |
802 | ||
f5fc0f86 LC |
803 | static void wl1271_tx_complete_packet(struct wl1271 *wl, |
804 | struct wl1271_tx_hw_res_descr *result) | |
805 | { | |
f5fc0f86 | 806 | struct ieee80211_tx_info *info; |
48e93e40 EP |
807 | struct ieee80211_vif *vif; |
808 | struct wl12xx_vif *wlvif; | |
f5fc0f86 | 809 | struct sk_buff *skb; |
f5fc0f86 | 810 | int id = result->id; |
31627dc5 | 811 | int rate = -1; |
d2e2d769 | 812 | u8 rate_flags = 0; |
31627dc5 | 813 | u8 retries = 0; |
f5fc0f86 LC |
814 | |
815 | /* check for id legality */ | |
ffb591cd | 816 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
817 | wl1271_warning("TX result illegal id: %d", id); |
818 | return; | |
819 | } | |
820 | ||
821 | skb = wl->tx_frames[id]; | |
822 | info = IEEE80211_SKB_CB(skb); | |
823 | ||
990f5de7 | 824 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
825 | wl1271_free_tx_id(wl, id); |
826 | return; | |
827 | } | |
828 | ||
48e93e40 EP |
829 | /* info->control is valid as long as we don't update info->status */ |
830 | vif = info->control.vif; | |
831 | wlvif = wl12xx_vif_to_data(vif); | |
832 | ||
31627dc5 JO |
833 | /* update the TX status info */ |
834 | if (result->status == TX_SUCCESS) { | |
835 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 836 | info->flags |= IEEE80211_TX_STAT_ACK; |
1b92f15e EP |
837 | rate = wl1271_rate_to_idx(result->rate_class_index, |
838 | wlvif->band); | |
d2e2d769 | 839 | rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index); |
31627dc5 JO |
840 | retries = result->ack_failures; |
841 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
842 | wl->stats.excessive_retries++; | |
843 | retries = result->ack_failures; | |
f5fc0f86 LC |
844 | } |
845 | ||
31627dc5 JO |
846 | info->status.rates[0].idx = rate; |
847 | info->status.rates[0].count = retries; | |
d2e2d769 | 848 | info->status.rates[0].flags = rate_flags; |
31627dc5 JO |
849 | info->status.ack_signal = -1; |
850 | ||
f5fc0f86 LC |
851 | wl->stats.retry_count += result->ack_failures; |
852 | ||
b992c682 OK |
853 | /* |
854 | * update sequence number only when relevant, i.e. only in | |
855 | * sessions of TKIP, AES and GEM (not in open or WEP sessions) | |
856 | */ | |
857 | if (info->control.hw_key && | |
858 | (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || | |
859 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || | |
860 | info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { | |
861 | u8 fw_lsb = result->tx_security_sequence_number_lsb; | |
48e93e40 | 862 | u8 cur_lsb = wlvif->tx_security_last_seq_lsb; |
b992c682 OK |
863 | |
864 | /* | |
865 | * update security sequence number, taking care of potential | |
866 | * wrap-around | |
867 | */ | |
48e93e40 EP |
868 | wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff; |
869 | wlvif->tx_security_last_seq_lsb = fw_lsb; | |
b992c682 | 870 | } |
ac4e4ce5 | 871 | |
1e2b7976 JO |
872 | /* remove private header from packet */ |
873 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
874 | ||
875 | /* remove TKIP header space if present */ | |
f5fc0f86 | 876 | if (info->control.hw_key && |
97359d12 | 877 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 | 878 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
5ec8a448 EP |
879 | memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, |
880 | hdrlen); | |
881 | skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); | |
1e2b7976 | 882 | } |
f5fc0f86 LC |
883 | |
884 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
885 | " status 0x%x", | |
886 | result->id, skb, result->ack_failures, | |
887 | result->rate_class_index, result->status); | |
888 | ||
f5fc0f86 | 889 | /* return the packet to the stack */ |
a620865e | 890 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
92ef8960 | 891 | queue_work(wl->freezable_wq, &wl->netstack_work); |
25eeb9e3 | 892 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
893 | } |
894 | ||
895 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 896 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
897 | { |
898 | struct wl1271_acx_mem_map *memmap = | |
899 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 900 | u32 count, fw_counter; |
f5fc0f86 LC |
901 | u32 i; |
902 | ||
f5fc0f86 | 903 | /* read the tx results from the chipset */ |
7b048c52 TP |
904 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
905 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
906 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
907 | ||
908 | /* write host counter to chipset (to ack) */ | |
909 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
910 | offsetof(struct wl1271_tx_hw_res_if, | |
911 | tx_result_host_counter), fw_counter); | |
912 | ||
913 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 914 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
915 | |
916 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 917 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 918 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
919 | |
920 | /* process the results */ | |
921 | for (i = 0; i < count; i++) { | |
922 | struct wl1271_tx_hw_res_descr *result; | |
923 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
924 | ||
925 | /* process the packet */ | |
926 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
927 | wl1271_tx_complete_packet(wl, result); | |
928 | ||
929 | wl->tx_results_count++; | |
930 | } | |
f5fc0f86 LC |
931 | } |
932 | ||
a8c0ddb5 AN |
933 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
934 | { | |
935 | struct sk_buff *skb; | |
f1a46384 | 936 | int i; |
a8c0ddb5 | 937 | unsigned long flags; |
1d36cd89 | 938 | struct ieee80211_tx_info *info; |
f1a46384 | 939 | int total[NUM_TX_QUEUES]; |
a8c0ddb5 AN |
940 | |
941 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
f1a46384 | 942 | total[i] = 0; |
a8c0ddb5 AN |
943 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { |
944 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
79ebec76 AN |
945 | |
946 | if (!wl12xx_is_dummy_packet(wl, skb)) { | |
947 | info = IEEE80211_SKB_CB(skb); | |
948 | info->status.rates[0].idx = -1; | |
949 | info->status.rates[0].count = 0; | |
950 | ieee80211_tx_status_ni(wl->hw, skb); | |
951 | } | |
952 | ||
f1a46384 | 953 | total[i]++; |
a8c0ddb5 AN |
954 | } |
955 | } | |
956 | ||
957 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 AN |
958 | for (i = 0; i < NUM_TX_QUEUES; i++) |
959 | wl->tx_queue_count[i] -= total[i]; | |
a8c0ddb5 AN |
960 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
961 | ||
962 | wl1271_handle_tx_low_watermark(wl); | |
963 | } | |
964 | ||
7dece1c8 | 965 | /* caller must hold wl->mutex and TX must be stopped */ |
d6a3cc2e | 966 | void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
f5fc0f86 LC |
967 | { |
968 | int i; | |
f5fc0f86 LC |
969 | |
970 | /* TX failure */ | |
d6a3cc2e EP |
971 | for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) { |
972 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) | |
c7ffb902 | 973 | wl1271_free_sta(wl, wlvif, i); |
d6a3cc2e EP |
974 | else |
975 | wlvif->sta.ba_rx_bitmap = 0; | |
f1acea9a | 976 | |
d6a3cc2e EP |
977 | wl->links[i].allocated_pkts = 0; |
978 | wl->links[i].prev_freed_pkts = 0; | |
f5fc0f86 | 979 | } |
d6a3cc2e EP |
980 | wlvif->last_tx_hlid = 0; |
981 | ||
982 | } | |
983 | /* caller must hold wl->mutex and TX must be stopped */ | |
984 | void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues) | |
985 | { | |
986 | int i; | |
987 | struct sk_buff *skb; | |
988 | struct ieee80211_tx_info *info; | |
a8c0ddb5 | 989 | |
6246ca00 AN |
990 | /* only reset the queues if something bad happened */ |
991 | if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl) != 0)) { | |
992 | for (i = 0; i < WL12XX_MAX_LINKS; i++) | |
993 | wl1271_tx_reset_link_queues(wl, i); | |
994 | ||
995 | for (i = 0; i < NUM_TX_QUEUES; i++) | |
996 | wl->tx_queue_count[i] = 0; | |
997 | } | |
f1acea9a | 998 | |
708bb3cf | 999 | wl->stopped_queues_map = 0; |
f5fc0f86 | 1000 | |
2fe33e8c IY |
1001 | /* |
1002 | * Make sure the driver is at a consistent state, in case this | |
1003 | * function is called from a context other than interface removal. | |
7dece1c8 | 1004 | * This call will always wake the TX queues. |
2fe33e8c | 1005 | */ |
7dece1c8 AN |
1006 | if (reset_tx_queues) |
1007 | wl1271_handle_tx_low_watermark(wl); | |
2fe33e8c | 1008 | |
50e9f746 IY |
1009 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
1010 | if (wl->tx_frames[i] == NULL) | |
1011 | continue; | |
1012 | ||
1013 | skb = wl->tx_frames[i]; | |
1014 | wl1271_free_tx_id(wl, i); | |
1015 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
1016 | ||
990f5de7 | 1017 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
1018 | /* |
1019 | * Remove private headers before passing the skb to | |
1020 | * mac80211 | |
1021 | */ | |
1022 | info = IEEE80211_SKB_CB(skb); | |
1023 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
1024 | if (info->control.hw_key && | |
1025 | info->control.hw_key->cipher == | |
1026 | WLAN_CIPHER_SUITE_TKIP) { | |
1027 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
5ec8a448 | 1028 | memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, |
ae47c45f | 1029 | skb->data, hdrlen); |
5ec8a448 | 1030 | skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); |
ae47c45f | 1031 | } |
50e9f746 | 1032 | |
ae47c45f SL |
1033 | info->status.rates[0].idx = -1; |
1034 | info->status.rates[0].count = 0; | |
50e9f746 | 1035 | |
c27d3acc | 1036 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 1037 | } |
50e9f746 | 1038 | } |
781608c4 JO |
1039 | } |
1040 | ||
1041 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
1042 | ||
1043 | /* caller must *NOT* hold wl->mutex */ | |
1044 | void wl1271_tx_flush(struct wl1271 *wl) | |
1045 | { | |
1046 | unsigned long timeout; | |
18aa755b | 1047 | int i; |
781608c4 JO |
1048 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); |
1049 | ||
1050 | while (!time_after(jiffies, timeout)) { | |
1051 | mutex_lock(&wl->mutex); | |
a8c0ddb5 | 1052 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
f1a46384 AN |
1053 | wl->tx_frames_cnt, |
1054 | wl1271_tx_total_queue_count(wl)); | |
1055 | if ((wl->tx_frames_cnt == 0) && | |
1056 | (wl1271_tx_total_queue_count(wl) == 0)) { | |
781608c4 JO |
1057 | mutex_unlock(&wl->mutex); |
1058 | return; | |
1059 | } | |
1060 | mutex_unlock(&wl->mutex); | |
1061 | msleep(1); | |
1062 | } | |
1063 | ||
1064 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
18aa755b AN |
1065 | |
1066 | /* forcibly flush all Tx buffers on our queues */ | |
1067 | mutex_lock(&wl->mutex); | |
1068 | for (i = 0; i < WL12XX_MAX_LINKS; i++) | |
1069 | wl1271_tx_reset_link_queues(wl, i); | |
1070 | mutex_unlock(&wl->mutex); | |
f5fc0f86 | 1071 | } |
e0fe371b | 1072 | |
af7fbb28 | 1073 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) |
e0fe371b | 1074 | { |
af7fbb28 EP |
1075 | if (WARN_ON(!rate_set)) |
1076 | return 0; | |
e0fe371b | 1077 | |
af7fbb28 | 1078 | return BIT(__ffs(rate_set)); |
e0fe371b | 1079 | } |