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 | |
742246f8 AN |
229 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
230 | wl->tx_allocated_pkts[ac]++; | |
bf54e301 | 231 | |
0f168014 EP |
232 | if (!is_dummy && wlvif && |
233 | wlvif->bss_type == BSS_TYPE_AP_BSS && | |
c7ffb902 | 234 | test_bit(hlid, wlvif->ap.sta_hlid_map)) |
9b17f1b3 | 235 | wl->links[hlid].allocated_pkts++; |
09039f42 | 236 | |
f5fc0f86 LC |
237 | ret = 0; |
238 | ||
239 | wl1271_debug(DEBUG_TX, | |
240 | "tx_allocate: size: %d, blocks: %d, id: %d", | |
241 | total_len, total_blocks, id); | |
781608c4 | 242 | } else { |
25eeb9e3 | 243 | wl1271_free_tx_id(wl, id); |
781608c4 | 244 | } |
f5fc0f86 LC |
245 | |
246 | return ret; | |
247 | } | |
248 | ||
a32d0cdf | 249 | static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 EP |
250 | struct sk_buff *skb, u32 extra, |
251 | struct ieee80211_tx_info *control, u8 hlid) | |
f5fc0f86 | 252 | { |
ac5e1e39 | 253 | struct timespec ts; |
f5fc0f86 | 254 | struct wl1271_tx_hw_descr *desc; |
48a61477 | 255 | int aligned_len, ac, rate_idx; |
ac5e1e39 | 256 | s64 hosttime; |
cf00f379 | 257 | u16 tx_attr = 0; |
f4f57943 EP |
258 | __le16 frame_control; |
259 | struct ieee80211_hdr *hdr; | |
260 | u8 *frame_start; | |
a32d0cdf | 261 | bool is_dummy; |
f5fc0f86 LC |
262 | |
263 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
f4f57943 EP |
264 | frame_start = (u8 *)(desc + 1); |
265 | hdr = (struct ieee80211_hdr *)(frame_start + extra); | |
266 | frame_control = hdr->frame_control; | |
f5fc0f86 | 267 | |
1e2b7976 JO |
268 | /* relocate space for security header */ |
269 | if (extra) { | |
f4f57943 EP |
270 | int hdrlen = ieee80211_hdrlen(frame_control); |
271 | memmove(frame_start, hdr, hdrlen); | |
1e2b7976 JO |
272 | } |
273 | ||
f5fc0f86 | 274 | /* configure packet life time */ |
ac5e1e39 JO |
275 | getnstimeofday(&ts); |
276 | hosttime = (timespec_to_ns(&ts) >> 10); | |
277 | desc->start_time = cpu_to_le32(hosttime - wl->time_offset); | |
c6c8a65d | 278 | |
a32d0cdf | 279 | is_dummy = wl12xx_is_dummy_packet(wl, skb); |
0f168014 | 280 | if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS) |
c6c8a65d AN |
281 | desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); |
282 | else | |
283 | desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); | |
f5fc0f86 | 284 | |
db674d24 | 285 | /* queue */ |
c6999d83 | 286 | ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
db674d24 | 287 | desc->tid = skb->priority; |
c6c8a65d | 288 | |
a32d0cdf | 289 | if (is_dummy) { |
ae47c45f SL |
290 | /* |
291 | * FW expects the dummy packet to have an invalid session id - | |
292 | * any session id that is different than the one set in the join | |
293 | */ | |
98b86253 | 294 | tx_attr = (SESSION_COUNTER_INVALID << |
ae47c45f SL |
295 | TX_HW_ATTR_OFST_SESSION_COUNTER) & |
296 | TX_HW_ATTR_SESSION_COUNTER; | |
297 | ||
298 | tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; | |
0f168014 | 299 | } else if (wlvif) { |
ae47c45f | 300 | /* configure the tx attributes */ |
98b86253 EP |
301 | tx_attr = wlvif->session_counter << |
302 | TX_HW_ATTR_OFST_SESSION_COUNTER; | |
ae47c45f SL |
303 | } |
304 | ||
79b122dc | 305 | desc->hlid = hlid; |
0f168014 | 306 | if (is_dummy || !wlvif) |
a32d0cdf EP |
307 | rate_idx = 0; |
308 | else if (wlvif->bss_type != BSS_TYPE_AP_BSS) { | |
c6c8a65d AN |
309 | /* if the packets are destined for AP (have a STA entry) |
310 | send them with AP rate policies, otherwise use default | |
311 | basic rates */ | |
8a0f2ee3 EP |
312 | if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE) |
313 | rate_idx = wlvif->sta.p2p_rate_idx; | |
314 | else if (control->control.sta) | |
e5a359f8 | 315 | rate_idx = wlvif->sta.ap_rate_idx; |
c6c8a65d | 316 | else |
e5a359f8 | 317 | rate_idx = wlvif->sta.basic_rate_idx; |
c6c8a65d | 318 | } else { |
a8ab39a4 | 319 | if (hlid == wlvif->ap.global_hlid) |
e5a359f8 | 320 | rate_idx = wlvif->ap.mgmt_rate_idx; |
a8ab39a4 | 321 | else if (hlid == wlvif->ap.bcast_hlid) |
e5a359f8 | 322 | rate_idx = wlvif->ap.bcast_rate_idx; |
e51ae9be | 323 | else |
e5a359f8 | 324 | rate_idx = wlvif->ap.ucast_rate_idx[ac]; |
c6c8a65d AN |
325 | } |
326 | ||
327 | tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; | |
f5fc0f86 LC |
328 | desc->reserved = 0; |
329 | ||
0da13da7 | 330 | aligned_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 331 | |
0da13da7 | 332 | if (wl->chip.id == CHIP_ID_1283_PG20) { |
48a61477 SL |
333 | desc->wl128x_mem.extra_bytes = aligned_len - skb->len; |
334 | desc->length = cpu_to_le16(aligned_len >> 2); | |
ae77eccf SL |
335 | |
336 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d " | |
337 | "tx_attr: 0x%x len: %d life: %d mem: %d", | |
338 | desc->hlid, tx_attr, | |
339 | le16_to_cpu(desc->length), | |
340 | le16_to_cpu(desc->life_time), | |
341 | desc->wl128x_mem.total_mem_blocks); | |
48a61477 SL |
342 | } else { |
343 | int pad; | |
344 | ||
0da13da7 | 345 | /* Store the aligned length in terms of words */ |
48a61477 SL |
346 | desc->length = cpu_to_le16(aligned_len >> 2); |
347 | ||
348 | /* calculate number of padding bytes */ | |
349 | pad = aligned_len - skb->len; | |
350 | tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD; | |
f5fc0f86 | 351 | |
ae77eccf SL |
352 | wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d " |
353 | "tx_attr: 0x%x len: %d life: %d mem: %d", pad, | |
354 | desc->hlid, tx_attr, | |
355 | le16_to_cpu(desc->length), | |
356 | le16_to_cpu(desc->life_time), | |
357 | desc->wl127x_mem.total_mem_blocks); | |
48a61477 | 358 | } |
d0f63b20 | 359 | |
f4f57943 EP |
360 | /* for WEP shared auth - no fw encryption is needed */ |
361 | if (ieee80211_is_auth(frame_control) && | |
362 | ieee80211_has_protected(frame_control)) | |
363 | tx_attr |= TX_HW_ATTR_HOST_ENCRYPT; | |
364 | ||
d0f63b20 | 365 | desc->tx_attr = cpu_to_le16(tx_attr); |
f5fc0f86 LC |
366 | } |
367 | ||
368 | /* caller must hold wl->mutex */ | |
a32d0cdf EP |
369 | static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
370 | struct sk_buff *skb, u32 buf_offset) | |
f5fc0f86 LC |
371 | { |
372 | struct ieee80211_tx_info *info; | |
373 | u32 extra = 0; | |
374 | int ret = 0; | |
a19606b4 | 375 | u32 total_len; |
09039f42 | 376 | u8 hlid; |
536129c8 | 377 | bool is_dummy; |
f5fc0f86 LC |
378 | |
379 | if (!skb) | |
380 | return -EINVAL; | |
381 | ||
382 | info = IEEE80211_SKB_CB(skb); | |
383 | ||
536129c8 EP |
384 | /* TODO: handle dummy packets on multi-vifs */ |
385 | is_dummy = wl12xx_is_dummy_packet(wl, skb); | |
536129c8 | 386 | |
f5fc0f86 | 387 | if (info->control.hw_key && |
97359d12 | 388 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) |
f5fc0f86 LC |
389 | extra = WL1271_TKIP_IV_SPACE; |
390 | ||
391 | if (info->control.hw_key) { | |
7f179b46 AN |
392 | bool is_wep; |
393 | u8 idx = info->control.hw_key->hw_key_idx; | |
394 | u32 cipher = info->control.hw_key->cipher; | |
395 | ||
396 | is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || | |
397 | (cipher == WLAN_CIPHER_SUITE_WEP104); | |
f5fc0f86 | 398 | |
f75c753f | 399 | if (unlikely(is_wep && wlvif->default_key != idx)) { |
536129c8 | 400 | ret = wl1271_set_default_wep_key(wl, wlvif, idx); |
f5fc0f86 LC |
401 | if (ret < 0) |
402 | return ret; | |
f75c753f | 403 | wlvif->default_key = idx; |
f5fc0f86 LC |
404 | } |
405 | } | |
d6a3cc2e | 406 | hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); |
79b122dc | 407 | if (hlid == WL12XX_INVALID_LINK_ID) { |
e0d62536 | 408 | wl1271_error("invalid hlid. dropping skb 0x%p", skb); |
79b122dc EP |
409 | return -EINVAL; |
410 | } | |
09039f42 | 411 | |
a32d0cdf | 412 | ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid); |
f5fc0f86 LC |
413 | if (ret < 0) |
414 | return ret; | |
415 | ||
a32d0cdf | 416 | wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid); |
fae2fd76 | 417 | |
0f168014 | 418 | if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) { |
99a2775d | 419 | wl1271_tx_ap_update_inconnection_sta(wl, skb); |
c7ffb902 | 420 | wl1271_tx_regulate_link(wl, wlvif, hlid); |
b622d992 | 421 | } |
99a2775d | 422 | |
a19606b4 | 423 | /* |
48a61477 SL |
424 | * The length of each packet is stored in terms of |
425 | * words. Thus, we must pad the skb data to make sure its | |
426 | * length is aligned. The number of padding bytes is computed | |
427 | * and set in wl1271_tx_fill_hdr. | |
428 | * In special cases, we want to align to a specific block size | |
429 | * (eg. for wl128x with SDIO we align to 256). | |
a19606b4 | 430 | */ |
0da13da7 | 431 | total_len = wl12xx_calc_packet_alignment(wl, skb->len); |
48a61477 | 432 | |
a19606b4 IY |
433 | memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); |
434 | memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); | |
f5fc0f86 | 435 | |
990f5de7 | 436 | /* Revert side effects in the dummy packet skb, so it can be reused */ |
536129c8 | 437 | if (is_dummy) |
990f5de7 IY |
438 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); |
439 | ||
a19606b4 | 440 | return total_len; |
f5fc0f86 LC |
441 | } |
442 | ||
af7fbb28 EP |
443 | u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, |
444 | enum ieee80211_band rate_band) | |
830fb67b JO |
445 | { |
446 | struct ieee80211_supported_band *band; | |
447 | u32 enabled_rates = 0; | |
448 | int bit; | |
449 | ||
af7fbb28 | 450 | band = wl->hw->wiphy->bands[rate_band]; |
830fb67b JO |
451 | for (bit = 0; bit < band->n_bitrates; bit++) { |
452 | if (rate_set & 0x1) | |
453 | enabled_rates |= band->bitrates[bit].hw_value; | |
454 | rate_set >>= 1; | |
455 | } | |
456 | ||
18357850 SL |
457 | /* MCS rates indication are on bits 16 - 23 */ |
458 | rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; | |
459 | ||
460 | for (bit = 0; bit < 8; bit++) { | |
461 | if (rate_set & 0x1) | |
462 | enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); | |
463 | rate_set >>= 1; | |
464 | } | |
18357850 | 465 | |
830fb67b JO |
466 | return enabled_rates; |
467 | } | |
468 | ||
a8c0ddb5 | 469 | void wl1271_handle_tx_low_watermark(struct wl1271 *wl) |
2fe33e8c IY |
470 | { |
471 | unsigned long flags; | |
708bb3cf | 472 | int i; |
2fe33e8c | 473 | |
708bb3cf AN |
474 | for (i = 0; i < NUM_TX_QUEUES; i++) { |
475 | if (test_bit(i, &wl->stopped_queues_map) && | |
f1a46384 | 476 | wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) { |
708bb3cf AN |
477 | /* firmware buffer has space, restart queues */ |
478 | spin_lock_irqsave(&wl->wl_lock, flags); | |
479 | ieee80211_wake_queue(wl->hw, | |
480 | wl1271_tx_get_mac80211_queue(i)); | |
481 | clear_bit(i, &wl->stopped_queues_map); | |
482 | spin_unlock_irqrestore(&wl->wl_lock, flags); | |
483 | } | |
2fe33e8c IY |
484 | } |
485 | } | |
486 | ||
742246f8 AN |
487 | static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl, |
488 | struct sk_buff_head *queues) | |
489 | { | |
490 | int i, q = -1, ac; | |
491 | u32 min_pkts = 0xffffffff; | |
492 | ||
493 | /* | |
494 | * Find a non-empty ac where: | |
495 | * 1. There are packets to transmit | |
496 | * 2. The FW has the least allocated blocks | |
497 | * | |
498 | * We prioritize the ACs according to VO>VI>BE>BK | |
499 | */ | |
500 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
501 | ac = wl1271_tx_get_queue(i); | |
502 | if (!skb_queue_empty(&queues[ac]) && | |
503 | (wl->tx_allocated_pkts[ac] < min_pkts)) { | |
504 | q = ac; | |
505 | min_pkts = wl->tx_allocated_pkts[q]; | |
506 | } | |
507 | } | |
508 | ||
509 | if (q == -1) | |
510 | return NULL; | |
511 | ||
512 | return &queues[q]; | |
513 | } | |
514 | ||
d6a3cc2e EP |
515 | static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl, |
516 | struct wl1271_link *lnk) | |
6742f554 | 517 | { |
d6a3cc2e | 518 | struct sk_buff *skb; |
6742f554 | 519 | unsigned long flags; |
742246f8 | 520 | struct sk_buff_head *queue; |
6742f554 | 521 | |
d6a3cc2e | 522 | queue = wl1271_select_queue(wl, lnk->tx_queue); |
742246f8 | 523 | if (!queue) |
d6a3cc2e | 524 | return NULL; |
742246f8 AN |
525 | |
526 | skb = skb_dequeue(queue); | |
6742f554 | 527 | if (skb) { |
f1a46384 | 528 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
6742f554 | 529 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 530 | wl->tx_queue_count[q]--; |
6742f554 JO |
531 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
532 | } | |
533 | ||
534 | return skb; | |
535 | } | |
536 | ||
d6a3cc2e EP |
537 | static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl, |
538 | struct wl12xx_vif *wlvif) | |
a8c0ddb5 AN |
539 | { |
540 | struct sk_buff *skb = NULL; | |
a8c0ddb5 AN |
541 | int i, h, start_hlid; |
542 | ||
543 | /* start from the link after the last one */ | |
4438aca9 | 544 | start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
545 | |
546 | /* dequeue according to AC, round robin on each link */ | |
c7ffb902 EP |
547 | for (i = 0; i < WL12XX_MAX_LINKS; i++) { |
548 | h = (start_hlid + i) % WL12XX_MAX_LINKS; | |
a8c0ddb5 | 549 | |
742246f8 | 550 | /* only consider connected stations */ |
c7ffb902 | 551 | if (!test_bit(h, wlvif->links_map)) |
742246f8 AN |
552 | continue; |
553 | ||
d6a3cc2e EP |
554 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]); |
555 | if (!skb) | |
742246f8 AN |
556 | continue; |
557 | ||
d6a3cc2e EP |
558 | wlvif->last_tx_hlid = h; |
559 | break; | |
a8c0ddb5 AN |
560 | } |
561 | ||
d6a3cc2e | 562 | if (!skb) |
4438aca9 | 563 | wlvif->last_tx_hlid = 0; |
a8c0ddb5 AN |
564 | |
565 | return skb; | |
566 | } | |
567 | ||
a32d0cdf | 568 | static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl) |
a8c0ddb5 | 569 | { |
990f5de7 | 570 | unsigned long flags; |
e4120df9 | 571 | struct wl12xx_vif *wlvif = wl->last_wlvif; |
990f5de7 IY |
572 | struct sk_buff *skb = NULL; |
573 | ||
e4120df9 EP |
574 | if (wlvif) { |
575 | wl12xx_for_each_wlvif_continue(wl, wlvif) { | |
576 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
577 | if (skb) { | |
578 | wl->last_wlvif = wlvif; | |
579 | break; | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
584 | /* do another pass */ | |
585 | if (!skb) { | |
586 | wl12xx_for_each_wlvif(wl, wlvif) { | |
587 | skb = wl12xx_vif_skb_dequeue(wl, wlvif); | |
588 | if (skb) { | |
589 | wl->last_wlvif = wlvif; | |
590 | break; | |
591 | } | |
592 | } | |
a32d0cdf EP |
593 | } |
594 | ||
0f168014 EP |
595 | if (!skb) |
596 | skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]); | |
597 | ||
990f5de7 IY |
598 | if (!skb && |
599 | test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { | |
f1a46384 AN |
600 | int q; |
601 | ||
990f5de7 | 602 | skb = wl->dummy_packet; |
f1a46384 | 603 | q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); |
990f5de7 | 604 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 605 | wl->tx_queue_count[q]--; |
990f5de7 IY |
606 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
607 | } | |
608 | ||
609 | return skb; | |
a8c0ddb5 AN |
610 | } |
611 | ||
d6a3cc2e | 612 | static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif, |
536129c8 | 613 | struct sk_buff *skb) |
6742f554 JO |
614 | { |
615 | unsigned long flags; | |
616 | int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); | |
617 | ||
990f5de7 IY |
618 | if (wl12xx_is_dummy_packet(wl, skb)) { |
619 | set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); | |
d6a3cc2e EP |
620 | } else { |
621 | u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb); | |
a8c0ddb5 AN |
622 | skb_queue_head(&wl->links[hlid].tx_queue[q], skb); |
623 | ||
624 | /* make sure we dequeue the same packet next time */ | |
4438aca9 | 625 | wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) % |
d6a3cc2e | 626 | WL12XX_MAX_LINKS; |
a8c0ddb5 AN |
627 | } |
628 | ||
6742f554 | 629 | spin_lock_irqsave(&wl->wl_lock, flags); |
f1a46384 | 630 | wl->tx_queue_count[q]++; |
6742f554 JO |
631 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
632 | } | |
633 | ||
77ddaa10 EP |
634 | static bool wl1271_tx_is_data_present(struct sk_buff *skb) |
635 | { | |
636 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); | |
637 | ||
638 | return ieee80211_is_data_present(hdr->frame_control); | |
639 | } | |
640 | ||
9eb599e9 EP |
641 | void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids) |
642 | { | |
643 | struct wl12xx_vif *wlvif; | |
644 | u32 timeout; | |
645 | u8 hlid; | |
646 | ||
647 | if (!wl->conf.rx_streaming.interval) | |
648 | return; | |
649 | ||
650 | if (!wl->conf.rx_streaming.always && | |
651 | !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)) | |
652 | return; | |
653 | ||
654 | timeout = wl->conf.rx_streaming.duration; | |
655 | wl12xx_for_each_wlvif_sta(wl, wlvif) { | |
656 | bool found = false; | |
657 | for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) { | |
658 | if (test_bit(hlid, wlvif->links_map)) { | |
659 | found = true; | |
660 | break; | |
661 | } | |
662 | } | |
663 | ||
664 | if (!found) | |
665 | continue; | |
666 | ||
667 | /* enable rx streaming */ | |
0744bdb6 | 668 | if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags)) |
9eb599e9 EP |
669 | ieee80211_queue_work(wl->hw, |
670 | &wlvif->rx_streaming_enable_work); | |
671 | ||
672 | mod_timer(&wlvif->rx_streaming_timer, | |
673 | jiffies + msecs_to_jiffies(timeout)); | |
674 | } | |
675 | } | |
676 | ||
a32d0cdf | 677 | void wl1271_tx_work_locked(struct wl1271 *wl) |
f5fc0f86 | 678 | { |
a32d0cdf | 679 | struct wl12xx_vif *wlvif; |
f5fc0f86 | 680 | struct sk_buff *skb; |
9eb599e9 | 681 | struct wl1271_tx_hw_descr *desc; |
6c6e669e IY |
682 | u32 buf_offset = 0; |
683 | bool sent_packets = false; | |
9eb599e9 | 684 | unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0}; |
f5fc0f86 LC |
685 | int ret; |
686 | ||
f5fc0f86 | 687 | if (unlikely(wl->state == WL1271_STATE_OFF)) |
c1b193eb | 688 | return; |
f5fc0f86 | 689 | |
a32d0cdf | 690 | while ((skb = wl1271_skb_dequeue(wl))) { |
0f168014 | 691 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9eb599e9 EP |
692 | bool has_data = false; |
693 | ||
a32d0cdf | 694 | wlvif = NULL; |
0f168014 EP |
695 | if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif) |
696 | wlvif = wl12xx_vif_to_data(info->control.vif); | |
a32d0cdf | 697 | |
9eb599e9 | 698 | has_data = wlvif && wl1271_tx_is_data_present(skb); |
a32d0cdf | 699 | ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset); |
6c6e669e | 700 | if (ret == -EAGAIN) { |
a19606b4 | 701 | /* |
6c6e669e IY |
702 | * Aggregation buffer is full. |
703 | * Flush buffer and try again. | |
704 | */ | |
d6a3cc2e | 705 | wl1271_skb_queue_head(wl, wlvif, skb); |
6c6e669e | 706 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, |
6742f554 | 707 | buf_offset, true); |
6c6e669e IY |
708 | sent_packets = true; |
709 | buf_offset = 0; | |
710 | continue; | |
711 | } else if (ret == -EBUSY) { | |
712 | /* | |
713 | * Firmware buffer is full. | |
a19606b4 IY |
714 | * Queue back last skb, and stop aggregating. |
715 | */ | |
d6a3cc2e | 716 | wl1271_skb_queue_head(wl, wlvif, skb); |
a522550a IY |
717 | /* No work left, avoid scheduling redundant tx work */ |
718 | set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); | |
ffb591cd | 719 | goto out_ack; |
f5fc0f86 | 720 | } else if (ret < 0) { |
5de8eef4 EP |
721 | if (wl12xx_is_dummy_packet(wl, skb)) |
722 | /* | |
723 | * fw still expects dummy packet, | |
724 | * so re-enqueue it | |
725 | */ | |
726 | wl1271_skb_queue_head(wl, wlvif, skb); | |
727 | else | |
728 | ieee80211_free_txskb(wl->hw, skb); | |
ffb591cd | 729 | goto out_ack; |
f5fc0f86 | 730 | } |
a19606b4 IY |
731 | buf_offset += ret; |
732 | wl->tx_packets_count++; | |
9eb599e9 EP |
733 | if (has_data) { |
734 | desc = (struct wl1271_tx_hw_descr *) skb->data; | |
735 | __set_bit(desc->hlid, active_hlids); | |
736 | } | |
f5fc0f86 LC |
737 | } |
738 | ||
ffb591cd | 739 | out_ack: |
a19606b4 IY |
740 | if (buf_offset) { |
741 | wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, | |
742 | buf_offset, true); | |
6c6e669e IY |
743 | sent_packets = true; |
744 | } | |
745 | if (sent_packets) { | |
606ea9fa IY |
746 | /* |
747 | * Interrupt the firmware with the new packets. This is only | |
748 | * required for older hardware revisions | |
749 | */ | |
750 | if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) | |
751 | wl1271_write32(wl, WL1271_HOST_WR_ACCESS, | |
752 | wl->tx_packets_count); | |
753 | ||
a8c0ddb5 | 754 | wl1271_handle_tx_low_watermark(wl); |
a19606b4 | 755 | } |
9eb599e9 | 756 | wl12xx_rearm_rx_streaming(wl, active_hlids); |
a522550a | 757 | } |
f5fc0f86 | 758 | |
a522550a IY |
759 | void wl1271_tx_work(struct work_struct *work) |
760 | { | |
761 | struct wl1271 *wl = container_of(work, struct wl1271, tx_work); | |
c1b193eb | 762 | int ret; |
a522550a IY |
763 | |
764 | mutex_lock(&wl->mutex); | |
c1b193eb EP |
765 | ret = wl1271_ps_elp_wakeup(wl); |
766 | if (ret < 0) | |
767 | goto out; | |
768 | ||
a32d0cdf | 769 | wl1271_tx_work_locked(wl); |
c1b193eb | 770 | |
c75bbcdb | 771 | wl1271_ps_elp_sleep(wl); |
c1b193eb | 772 | out: |
f5fc0f86 LC |
773 | mutex_unlock(&wl->mutex); |
774 | } | |
775 | ||
d2e2d769 PF |
776 | static u8 wl1271_tx_get_rate_flags(u8 rate_class_index) |
777 | { | |
defe02c7 PF |
778 | u8 flags = 0; |
779 | ||
d2e2d769 PF |
780 | if (rate_class_index >= CONF_HW_RXTX_RATE_MCS_MIN && |
781 | rate_class_index <= CONF_HW_RXTX_RATE_MCS_MAX) | |
defe02c7 PF |
782 | flags |= IEEE80211_TX_RC_MCS; |
783 | if (rate_class_index == CONF_HW_RXTX_RATE_MCS7_SGI) | |
784 | flags |= IEEE80211_TX_RC_SHORT_GI; | |
785 | return flags; | |
d2e2d769 PF |
786 | } |
787 | ||
f5fc0f86 LC |
788 | static void wl1271_tx_complete_packet(struct wl1271 *wl, |
789 | struct wl1271_tx_hw_res_descr *result) | |
790 | { | |
f5fc0f86 | 791 | struct ieee80211_tx_info *info; |
48e93e40 EP |
792 | struct ieee80211_vif *vif; |
793 | struct wl12xx_vif *wlvif; | |
f5fc0f86 | 794 | struct sk_buff *skb; |
f5fc0f86 | 795 | int id = result->id; |
31627dc5 | 796 | int rate = -1; |
d2e2d769 | 797 | u8 rate_flags = 0; |
31627dc5 | 798 | u8 retries = 0; |
f5fc0f86 LC |
799 | |
800 | /* check for id legality */ | |
ffb591cd | 801 | if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) { |
f5fc0f86 LC |
802 | wl1271_warning("TX result illegal id: %d", id); |
803 | return; | |
804 | } | |
805 | ||
806 | skb = wl->tx_frames[id]; | |
807 | info = IEEE80211_SKB_CB(skb); | |
808 | ||
990f5de7 | 809 | if (wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
810 | wl1271_free_tx_id(wl, id); |
811 | return; | |
812 | } | |
813 | ||
48e93e40 EP |
814 | /* info->control is valid as long as we don't update info->status */ |
815 | vif = info->control.vif; | |
816 | wlvif = wl12xx_vif_to_data(vif); | |
817 | ||
31627dc5 JO |
818 | /* update the TX status info */ |
819 | if (result->status == TX_SUCCESS) { | |
820 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
f5fc0f86 | 821 | info->flags |= IEEE80211_TX_STAT_ACK; |
1b92f15e EP |
822 | rate = wl1271_rate_to_idx(result->rate_class_index, |
823 | wlvif->band); | |
d2e2d769 | 824 | rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index); |
31627dc5 JO |
825 | retries = result->ack_failures; |
826 | } else if (result->status == TX_RETRY_EXCEEDED) { | |
827 | wl->stats.excessive_retries++; | |
828 | retries = result->ack_failures; | |
f5fc0f86 LC |
829 | } |
830 | ||
31627dc5 JO |
831 | info->status.rates[0].idx = rate; |
832 | info->status.rates[0].count = retries; | |
d2e2d769 | 833 | info->status.rates[0].flags = rate_flags; |
31627dc5 JO |
834 | info->status.ack_signal = -1; |
835 | ||
f5fc0f86 LC |
836 | wl->stats.retry_count += result->ack_failures; |
837 | ||
b992c682 OK |
838 | /* |
839 | * update sequence number only when relevant, i.e. only in | |
840 | * sessions of TKIP, AES and GEM (not in open or WEP sessions) | |
841 | */ | |
842 | if (info->control.hw_key && | |
843 | (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || | |
844 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || | |
845 | info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { | |
846 | u8 fw_lsb = result->tx_security_sequence_number_lsb; | |
48e93e40 | 847 | u8 cur_lsb = wlvif->tx_security_last_seq_lsb; |
b992c682 OK |
848 | |
849 | /* | |
850 | * update security sequence number, taking care of potential | |
851 | * wrap-around | |
852 | */ | |
48e93e40 EP |
853 | wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff; |
854 | wlvif->tx_security_last_seq_lsb = fw_lsb; | |
b992c682 | 855 | } |
ac4e4ce5 | 856 | |
1e2b7976 JO |
857 | /* remove private header from packet */ |
858 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
859 | ||
860 | /* remove TKIP header space if present */ | |
f5fc0f86 | 861 | if (info->control.hw_key && |
97359d12 | 862 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
1e2b7976 JO |
863 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
864 | memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen); | |
865 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
866 | } | |
f5fc0f86 LC |
867 | |
868 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" | |
869 | " status 0x%x", | |
870 | result->id, skb, result->ack_failures, | |
871 | result->rate_class_index, result->status); | |
872 | ||
f5fc0f86 | 873 | /* return the packet to the stack */ |
a620865e | 874 | skb_queue_tail(&wl->deferred_tx_queue, skb); |
92ef8960 | 875 | queue_work(wl->freezable_wq, &wl->netstack_work); |
25eeb9e3 | 876 | wl1271_free_tx_id(wl, result->id); |
f5fc0f86 LC |
877 | } |
878 | ||
879 | /* Called upon reception of a TX complete interrupt */ | |
ffb591cd | 880 | void wl1271_tx_complete(struct wl1271 *wl) |
f5fc0f86 LC |
881 | { |
882 | struct wl1271_acx_mem_map *memmap = | |
883 | (struct wl1271_acx_mem_map *)wl->target_mem_map; | |
ffb591cd | 884 | u32 count, fw_counter; |
f5fc0f86 LC |
885 | u32 i; |
886 | ||
f5fc0f86 | 887 | /* read the tx results from the chipset */ |
7b048c52 TP |
888 | wl1271_read(wl, le32_to_cpu(memmap->tx_result), |
889 | wl->tx_res_if, sizeof(*wl->tx_res_if), false); | |
ffb591cd JO |
890 | fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); |
891 | ||
892 | /* write host counter to chipset (to ack) */ | |
893 | wl1271_write32(wl, le32_to_cpu(memmap->tx_result) + | |
894 | offsetof(struct wl1271_tx_hw_res_if, | |
895 | tx_result_host_counter), fw_counter); | |
896 | ||
897 | count = fw_counter - wl->tx_results_count; | |
06f7bc7d | 898 | wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); |
f5fc0f86 LC |
899 | |
900 | /* verify that the result buffer is not getting overrun */ | |
ffb591cd | 901 | if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) |
f5fc0f86 | 902 | wl1271_warning("TX result overflow from chipset: %d", count); |
f5fc0f86 LC |
903 | |
904 | /* process the results */ | |
905 | for (i = 0; i < count; i++) { | |
906 | struct wl1271_tx_hw_res_descr *result; | |
907 | u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; | |
908 | ||
909 | /* process the packet */ | |
910 | result = &(wl->tx_res_if->tx_results_queue[offset]); | |
911 | wl1271_tx_complete_packet(wl, result); | |
912 | ||
913 | wl->tx_results_count++; | |
914 | } | |
f5fc0f86 LC |
915 | } |
916 | ||
a8c0ddb5 AN |
917 | void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) |
918 | { | |
919 | struct sk_buff *skb; | |
f1a46384 | 920 | int i; |
a8c0ddb5 | 921 | unsigned long flags; |
1d36cd89 | 922 | struct ieee80211_tx_info *info; |
f1a46384 | 923 | int total[NUM_TX_QUEUES]; |
a8c0ddb5 AN |
924 | |
925 | for (i = 0; i < NUM_TX_QUEUES; i++) { | |
f1a46384 | 926 | total[i] = 0; |
a8c0ddb5 AN |
927 | while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) { |
928 | wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); | |
79ebec76 AN |
929 | |
930 | if (!wl12xx_is_dummy_packet(wl, skb)) { | |
931 | info = IEEE80211_SKB_CB(skb); | |
932 | info->status.rates[0].idx = -1; | |
933 | info->status.rates[0].count = 0; | |
934 | ieee80211_tx_status_ni(wl->hw, skb); | |
935 | } | |
936 | ||
f1a46384 | 937 | total[i]++; |
a8c0ddb5 AN |
938 | } |
939 | } | |
940 | ||
941 | spin_lock_irqsave(&wl->wl_lock, flags); | |
f1a46384 AN |
942 | for (i = 0; i < NUM_TX_QUEUES; i++) |
943 | wl->tx_queue_count[i] -= total[i]; | |
a8c0ddb5 AN |
944 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
945 | ||
946 | wl1271_handle_tx_low_watermark(wl); | |
947 | } | |
948 | ||
7dece1c8 | 949 | /* caller must hold wl->mutex and TX must be stopped */ |
d6a3cc2e | 950 | void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif) |
f5fc0f86 LC |
951 | { |
952 | int i; | |
f5fc0f86 LC |
953 | |
954 | /* TX failure */ | |
d6a3cc2e EP |
955 | for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) { |
956 | if (wlvif->bss_type == BSS_TYPE_AP_BSS) | |
c7ffb902 | 957 | wl1271_free_sta(wl, wlvif, i); |
d6a3cc2e EP |
958 | else |
959 | wlvif->sta.ba_rx_bitmap = 0; | |
f1acea9a | 960 | |
d6a3cc2e EP |
961 | wl1271_tx_reset_link_queues(wl, i); |
962 | wl->links[i].allocated_pkts = 0; | |
963 | wl->links[i].prev_freed_pkts = 0; | |
f5fc0f86 | 964 | } |
d6a3cc2e EP |
965 | wlvif->last_tx_hlid = 0; |
966 | ||
967 | } | |
968 | /* caller must hold wl->mutex and TX must be stopped */ | |
969 | void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues) | |
970 | { | |
971 | int i; | |
972 | struct sk_buff *skb; | |
973 | struct ieee80211_tx_info *info; | |
a8c0ddb5 | 974 | |
f1acea9a AN |
975 | for (i = 0; i < NUM_TX_QUEUES; i++) |
976 | wl->tx_queue_count[i] = 0; | |
977 | ||
708bb3cf | 978 | wl->stopped_queues_map = 0; |
f5fc0f86 | 979 | |
2fe33e8c IY |
980 | /* |
981 | * Make sure the driver is at a consistent state, in case this | |
982 | * function is called from a context other than interface removal. | |
7dece1c8 | 983 | * This call will always wake the TX queues. |
2fe33e8c | 984 | */ |
7dece1c8 AN |
985 | if (reset_tx_queues) |
986 | wl1271_handle_tx_low_watermark(wl); | |
2fe33e8c | 987 | |
50e9f746 IY |
988 | for (i = 0; i < ACX_TX_DESCRIPTORS; i++) { |
989 | if (wl->tx_frames[i] == NULL) | |
990 | continue; | |
991 | ||
992 | skb = wl->tx_frames[i]; | |
993 | wl1271_free_tx_id(wl, i); | |
994 | wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); | |
995 | ||
990f5de7 | 996 | if (!wl12xx_is_dummy_packet(wl, skb)) { |
ae47c45f SL |
997 | /* |
998 | * Remove private headers before passing the skb to | |
999 | * mac80211 | |
1000 | */ | |
1001 | info = IEEE80211_SKB_CB(skb); | |
1002 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
1003 | if (info->control.hw_key && | |
1004 | info->control.hw_key->cipher == | |
1005 | WLAN_CIPHER_SUITE_TKIP) { | |
1006 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1007 | memmove(skb->data + WL1271_TKIP_IV_SPACE, | |
1008 | skb->data, hdrlen); | |
1009 | skb_pull(skb, WL1271_TKIP_IV_SPACE); | |
1010 | } | |
50e9f746 | 1011 | |
ae47c45f SL |
1012 | info->status.rates[0].idx = -1; |
1013 | info->status.rates[0].count = 0; | |
50e9f746 | 1014 | |
c27d3acc | 1015 | ieee80211_tx_status_ni(wl->hw, skb); |
ae47c45f | 1016 | } |
50e9f746 | 1017 | } |
781608c4 JO |
1018 | } |
1019 | ||
1020 | #define WL1271_TX_FLUSH_TIMEOUT 500000 | |
1021 | ||
1022 | /* caller must *NOT* hold wl->mutex */ | |
1023 | void wl1271_tx_flush(struct wl1271 *wl) | |
1024 | { | |
1025 | unsigned long timeout; | |
1026 | timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); | |
1027 | ||
1028 | while (!time_after(jiffies, timeout)) { | |
1029 | mutex_lock(&wl->mutex); | |
a8c0ddb5 | 1030 | wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d", |
f1a46384 AN |
1031 | wl->tx_frames_cnt, |
1032 | wl1271_tx_total_queue_count(wl)); | |
1033 | if ((wl->tx_frames_cnt == 0) && | |
1034 | (wl1271_tx_total_queue_count(wl) == 0)) { | |
781608c4 JO |
1035 | mutex_unlock(&wl->mutex); |
1036 | return; | |
1037 | } | |
1038 | mutex_unlock(&wl->mutex); | |
1039 | msleep(1); | |
1040 | } | |
1041 | ||
1042 | wl1271_warning("Unable to flush all TX buffers, timed out."); | |
f5fc0f86 | 1043 | } |
e0fe371b | 1044 | |
af7fbb28 | 1045 | u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) |
e0fe371b | 1046 | { |
af7fbb28 EP |
1047 | if (WARN_ON(!rate_set)) |
1048 | return 0; | |
e0fe371b | 1049 | |
af7fbb28 | 1050 | return BIT(__ffs(rate_set)); |
e0fe371b | 1051 | } |