Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Common code for mac80211 Prism54 drivers |
| 3 | * |
| 4 | * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> |
| 5 | * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> |
| 6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
| 7 | * |
| 8 | * Based on: |
| 9 | * - the islsm (softmac prism54) driver, which is: |
| 10 | * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. |
| 11 | * - stlc45xx driver |
| 12 | * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License version 2 as |
| 16 | * published by the Free Software Foundation. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/firmware.h> |
| 21 | #include <linux/etherdevice.h> |
| 22 | |
| 23 | #include <net/mac80211.h> |
| 24 | |
| 25 | #include "p54.h" |
| 26 | #include "lmac.h" |
| 27 | |
| 28 | #ifdef P54_MM_DEBUG |
| 29 | static void p54_dump_tx_queue(struct p54_common *priv) |
| 30 | { |
| 31 | unsigned long flags; |
| 32 | struct ieee80211_tx_info *info; |
| 33 | struct p54_tx_info *range; |
| 34 | struct sk_buff *skb; |
| 35 | struct p54_hdr *hdr; |
| 36 | unsigned int i = 0; |
| 37 | u32 prev_addr; |
| 38 | u32 largest_hole = 0, free; |
| 39 | |
| 40 | spin_lock_irqsave(&priv->tx_queue.lock, flags); |
Joe Perches | c96c31e | 2010-07-26 14:39:58 -0700 | [diff] [blame] | 41 | wiphy_debug(priv->hw->wiphy, "/ --- tx queue dump (%d entries) ---\n", |
| 42 | skb_queue_len(&priv->tx_queue)); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 43 | |
| 44 | prev_addr = priv->rx_start; |
| 45 | skb_queue_walk(&priv->tx_queue, skb) { |
| 46 | info = IEEE80211_SKB_CB(skb); |
| 47 | range = (void *) info->rate_driver_data; |
| 48 | hdr = (void *) skb->data; |
| 49 | |
| 50 | free = range->start_addr - prev_addr; |
Joe Perches | c96c31e | 2010-07-26 14:39:58 -0700 | [diff] [blame] | 51 | wiphy_debug(priv->hw->wiphy, |
| 52 | "| [%02d] => [skb:%p skb_len:0x%04x " |
| 53 | "hdr:{flags:%02x len:%04x req_id:%04x type:%02x} " |
| 54 | "mem:{start:%04x end:%04x, free:%d}]\n", |
| 55 | i++, skb, skb->len, |
| 56 | le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len), |
| 57 | le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type), |
| 58 | range->start_addr, range->end_addr, free); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 59 | |
| 60 | prev_addr = range->end_addr; |
| 61 | largest_hole = max(largest_hole, free); |
| 62 | } |
| 63 | free = priv->rx_end - prev_addr; |
| 64 | largest_hole = max(largest_hole, free); |
Joe Perches | c96c31e | 2010-07-26 14:39:58 -0700 | [diff] [blame] | 65 | wiphy_debug(priv->hw->wiphy, |
| 66 | "\\ --- [free: %d], largest free block: %d ---\n", |
| 67 | free, largest_hole); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 68 | spin_unlock_irqrestore(&priv->tx_queue.lock, flags); |
| 69 | } |
| 70 | #endif /* P54_MM_DEBUG */ |
| 71 | |
| 72 | /* |
| 73 | * So, the firmware is somewhat stupid and doesn't know what places in its |
| 74 | * memory incoming data should go to. By poking around in the firmware, we |
| 75 | * can find some unused memory to upload our packets to. However, data that we |
| 76 | * want the card to TX needs to stay intact until the card has told us that |
| 77 | * it is done with it. This function finds empty places we can upload to and |
| 78 | * marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or |
| 79 | * p54_free_skb frees allocated areas. |
| 80 | */ |
| 81 | static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb) |
| 82 | { |
| 83 | struct sk_buff *entry, *target_skb = NULL; |
| 84 | struct ieee80211_tx_info *info; |
| 85 | struct p54_tx_info *range; |
| 86 | struct p54_hdr *data = (void *) skb->data; |
| 87 | unsigned long flags; |
| 88 | u32 last_addr = priv->rx_start; |
| 89 | u32 target_addr = priv->rx_start; |
| 90 | u16 len = priv->headroom + skb->len + priv->tailroom + 3; |
| 91 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 92 | info = IEEE80211_SKB_CB(skb); |
| 93 | range = (void *) info->rate_driver_data; |
| 94 | len = (range->extra_len + len) & ~0x3; |
| 95 | |
| 96 | spin_lock_irqsave(&priv->tx_queue.lock, flags); |
| 97 | if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) { |
| 98 | /* |
| 99 | * The tx_queue is now really full. |
| 100 | * |
| 101 | * TODO: check if the device has crashed and reset it. |
| 102 | */ |
| 103 | spin_unlock_irqrestore(&priv->tx_queue.lock, flags); |
| 104 | return -EBUSY; |
| 105 | } |
| 106 | |
| 107 | skb_queue_walk(&priv->tx_queue, entry) { |
| 108 | u32 hole_size; |
| 109 | info = IEEE80211_SKB_CB(entry); |
| 110 | range = (void *) info->rate_driver_data; |
| 111 | hole_size = range->start_addr - last_addr; |
| 112 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 113 | if (!target_skb && hole_size >= len) { |
| 114 | target_skb = entry->prev; |
| 115 | hole_size -= len; |
| 116 | target_addr = last_addr; |
| 117 | break; |
| 118 | } |
| 119 | last_addr = range->end_addr; |
| 120 | } |
| 121 | if (unlikely(!target_skb)) { |
| 122 | if (priv->rx_end - last_addr >= len) { |
| 123 | target_skb = priv->tx_queue.prev; |
| 124 | if (!skb_queue_empty(&priv->tx_queue)) { |
| 125 | info = IEEE80211_SKB_CB(target_skb); |
| 126 | range = (void *)info->rate_driver_data; |
| 127 | target_addr = range->end_addr; |
| 128 | } |
| 129 | } else { |
| 130 | spin_unlock_irqrestore(&priv->tx_queue.lock, flags); |
| 131 | return -ENOSPC; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | info = IEEE80211_SKB_CB(skb); |
| 136 | range = (void *) info->rate_driver_data; |
| 137 | range->start_addr = target_addr; |
| 138 | range->end_addr = target_addr + len; |
Christian Lamparter | 46df10a | 2009-07-16 20:03:47 +0200 | [diff] [blame] | 139 | data->req_id = cpu_to_le32(target_addr + priv->headroom); |
| 140 | if (IS_DATA_FRAME(skb) && |
| 141 | unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) |
| 142 | priv->beacon_req_id = data->req_id; |
| 143 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 144 | __skb_queue_after(&priv->tx_queue, target_skb, skb); |
| 145 | spin_unlock_irqrestore(&priv->tx_queue.lock, flags); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static void p54_tx_pending(struct p54_common *priv) |
| 150 | { |
| 151 | struct sk_buff *skb; |
| 152 | int ret; |
| 153 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 154 | skb = skb_dequeue(&priv->tx_pending); |
| 155 | if (unlikely(!skb)) |
| 156 | return ; |
| 157 | |
| 158 | ret = p54_assign_address(priv, skb); |
| 159 | if (unlikely(ret)) |
| 160 | skb_queue_head(&priv->tx_pending, skb); |
| 161 | else |
| 162 | priv->tx(priv->hw, skb); |
| 163 | } |
| 164 | |
| 165 | static void p54_wake_queues(struct p54_common *priv) |
| 166 | { |
| 167 | unsigned long flags; |
| 168 | unsigned int i; |
| 169 | |
| 170 | if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) |
| 171 | return ; |
| 172 | |
| 173 | p54_tx_pending(priv); |
| 174 | |
| 175 | spin_lock_irqsave(&priv->tx_stats_lock, flags); |
| 176 | for (i = 0; i < priv->hw->queues; i++) { |
| 177 | if (priv->tx_stats[i + P54_QUEUE_DATA].len < |
| 178 | priv->tx_stats[i + P54_QUEUE_DATA].limit) |
| 179 | ieee80211_wake_queue(priv->hw, i); |
| 180 | } |
| 181 | spin_unlock_irqrestore(&priv->tx_stats_lock, flags); |
| 182 | } |
| 183 | |
| 184 | static int p54_tx_qos_accounting_alloc(struct p54_common *priv, |
| 185 | struct sk_buff *skb, |
| 186 | const u16 p54_queue) |
| 187 | { |
Kalle Valo | 97e93fcd | 2010-02-07 10:21:46 +0200 | [diff] [blame] | 188 | struct p54_tx_queue_stats *queue; |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 189 | unsigned long flags; |
| 190 | |
Darren Jenkins | 088ea18 | 2010-02-17 23:40:15 +1100 | [diff] [blame] | 191 | if (WARN_ON(p54_queue >= P54_QUEUE_NUM)) |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 192 | return -EINVAL; |
| 193 | |
| 194 | queue = &priv->tx_stats[p54_queue]; |
| 195 | |
| 196 | spin_lock_irqsave(&priv->tx_stats_lock, flags); |
Christian Lamparter | 2ffa5fe | 2009-07-06 15:18:13 +0200 | [diff] [blame] | 197 | if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) { |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 198 | spin_unlock_irqrestore(&priv->tx_stats_lock, flags); |
| 199 | return -ENOSPC; |
| 200 | } |
| 201 | |
| 202 | queue->len++; |
| 203 | queue->count++; |
| 204 | |
| 205 | if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) { |
| 206 | u16 ac_queue = p54_queue - P54_QUEUE_DATA; |
| 207 | ieee80211_stop_queue(priv->hw, ac_queue); |
| 208 | } |
| 209 | |
| 210 | spin_unlock_irqrestore(&priv->tx_stats_lock, flags); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static void p54_tx_qos_accounting_free(struct p54_common *priv, |
| 215 | struct sk_buff *skb) |
| 216 | { |
Christian Lamparter | 12f49a7 | 2009-07-16 20:03:17 +0200 | [diff] [blame] | 217 | if (IS_DATA_FRAME(skb)) { |
Christian Lamparter | 2ffa5fe | 2009-07-06 15:18:13 +0200 | [diff] [blame] | 218 | unsigned long flags; |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 219 | |
Christian Lamparter | 2ffa5fe | 2009-07-06 15:18:13 +0200 | [diff] [blame] | 220 | spin_lock_irqsave(&priv->tx_stats_lock, flags); |
Christian Lamparter | 46df10a | 2009-07-16 20:03:47 +0200 | [diff] [blame] | 221 | priv->tx_stats[GET_HW_QUEUE(skb)].len--; |
Christian Lamparter | 2ffa5fe | 2009-07-06 15:18:13 +0200 | [diff] [blame] | 222 | spin_unlock_irqrestore(&priv->tx_stats_lock, flags); |
Christian Lamparter | 46df10a | 2009-07-16 20:03:47 +0200 | [diff] [blame] | 223 | |
| 224 | if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) { |
| 225 | if (priv->beacon_req_id == GET_REQ_ID(skb)) { |
| 226 | /* this is the active beacon set anymore */ |
| 227 | priv->beacon_req_id = 0; |
| 228 | } |
| 229 | complete(&priv->beacon_comp); |
| 230 | } |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 231 | } |
| 232 | p54_wake_queues(priv); |
| 233 | } |
| 234 | |
| 235 | void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) |
| 236 | { |
| 237 | struct p54_common *priv = dev->priv; |
| 238 | if (unlikely(!skb)) |
| 239 | return ; |
| 240 | |
| 241 | skb_unlink(skb, &priv->tx_queue); |
| 242 | p54_tx_qos_accounting_free(priv, skb); |
| 243 | dev_kfree_skb_any(skb); |
| 244 | } |
| 245 | EXPORT_SYMBOL_GPL(p54_free_skb); |
| 246 | |
| 247 | static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv, |
| 248 | const __le32 req_id) |
| 249 | { |
| 250 | struct sk_buff *entry; |
| 251 | unsigned long flags; |
| 252 | |
| 253 | spin_lock_irqsave(&priv->tx_queue.lock, flags); |
| 254 | skb_queue_walk(&priv->tx_queue, entry) { |
| 255 | struct p54_hdr *hdr = (struct p54_hdr *) entry->data; |
| 256 | |
| 257 | if (hdr->req_id == req_id) { |
| 258 | __skb_unlink(entry, &priv->tx_queue); |
| 259 | spin_unlock_irqrestore(&priv->tx_queue.lock, flags); |
| 260 | p54_tx_qos_accounting_free(priv, entry); |
| 261 | return entry; |
| 262 | } |
| 263 | } |
| 264 | spin_unlock_irqrestore(&priv->tx_queue.lock, flags); |
| 265 | return NULL; |
| 266 | } |
| 267 | |
| 268 | void p54_tx(struct p54_common *priv, struct sk_buff *skb) |
| 269 | { |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 270 | skb_queue_tail(&priv->tx_pending, skb); |
| 271 | p54_tx_pending(priv); |
| 272 | } |
| 273 | |
| 274 | static int p54_rssi_to_dbm(struct p54_common *priv, int rssi) |
| 275 | { |
| 276 | int band = priv->hw->conf.channel->band; |
| 277 | |
| 278 | if (priv->rxhw != 5) |
| 279 | return ((rssi * priv->rssical_db[band].mul) / 64 + |
| 280 | priv->rssical_db[band].add) / 4; |
| 281 | else |
| 282 | /* |
| 283 | * TODO: find the correct formula |
| 284 | */ |
| 285 | return ((rssi * priv->rssical_db[band].mul) / 64 + |
| 286 | priv->rssical_db[band].add) / 4; |
| 287 | } |
| 288 | |
Christian Lamparter | e0f114e | 2009-07-07 19:08:07 +0200 | [diff] [blame] | 289 | /* |
| 290 | * Even if the firmware is capable of dealing with incoming traffic, |
| 291 | * while dozing, we have to prepared in case mac80211 uses PS-POLL |
| 292 | * to retrieve outstanding frames from our AP. |
| 293 | * (see comment in net/mac80211/mlme.c @ line 1993) |
| 294 | */ |
| 295 | static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb) |
| 296 | { |
| 297 | struct ieee80211_hdr *hdr = (void *) skb->data; |
| 298 | struct ieee80211_tim_ie *tim_ie; |
| 299 | u8 *tim; |
| 300 | u8 tim_len; |
| 301 | bool new_psm; |
| 302 | |
| 303 | /* only beacons have a TIM IE */ |
| 304 | if (!ieee80211_is_beacon(hdr->frame_control)) |
| 305 | return; |
| 306 | |
| 307 | if (!priv->aid) |
| 308 | return; |
| 309 | |
| 310 | /* only consider beacons from the associated BSSID */ |
| 311 | if (compare_ether_addr(hdr->addr3, priv->bssid)) |
| 312 | return; |
| 313 | |
| 314 | tim = p54_find_ie(skb, WLAN_EID_TIM); |
| 315 | if (!tim) |
| 316 | return; |
| 317 | |
| 318 | tim_len = tim[1]; |
| 319 | tim_ie = (struct ieee80211_tim_ie *) &tim[2]; |
| 320 | |
| 321 | new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid); |
| 322 | if (new_psm != priv->powersave_override) { |
| 323 | priv->powersave_override = new_psm; |
| 324 | p54_set_ps(priv); |
| 325 | } |
| 326 | } |
| 327 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 328 | static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb) |
| 329 | { |
| 330 | struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data; |
| 331 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); |
| 332 | u16 freq = le16_to_cpu(hdr->freq); |
| 333 | size_t header_len = sizeof(*hdr); |
| 334 | u32 tsf32; |
| 335 | u8 rate = hdr->rate & 0xf; |
| 336 | |
| 337 | /* |
| 338 | * If the device is in a unspecified state we have to |
| 339 | * ignore all data frames. Else we could end up with a |
| 340 | * nasty crash. |
| 341 | */ |
| 342 | if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) |
| 343 | return 0; |
| 344 | |
| 345 | if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) |
| 346 | return 0; |
| 347 | |
| 348 | if (hdr->decrypt_status == P54_DECRYPT_OK) |
| 349 | rx_status->flag |= RX_FLAG_DECRYPTED; |
| 350 | if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) || |
| 351 | (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP)) |
| 352 | rx_status->flag |= RX_FLAG_MMIC_ERROR; |
| 353 | |
| 354 | rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 355 | if (hdr->rate & 0x10) |
| 356 | rx_status->flag |= RX_FLAG_SHORTPRE; |
| 357 | if (priv->hw->conf.channel->band == IEEE80211_BAND_5GHZ) |
| 358 | rx_status->rate_idx = (rate < 4) ? 0 : rate - 4; |
| 359 | else |
| 360 | rx_status->rate_idx = rate; |
| 361 | |
| 362 | rx_status->freq = freq; |
| 363 | rx_status->band = priv->hw->conf.channel->band; |
| 364 | rx_status->antenna = hdr->antenna; |
| 365 | |
| 366 | tsf32 = le32_to_cpu(hdr->tsf32); |
| 367 | if (tsf32 < priv->tsf_low32) |
| 368 | priv->tsf_high32++; |
| 369 | rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32; |
| 370 | priv->tsf_low32 = tsf32; |
| 371 | |
| 372 | rx_status->flag |= RX_FLAG_TSFT; |
| 373 | |
| 374 | if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) |
| 375 | header_len += hdr->align[0]; |
| 376 | |
| 377 | skb_pull(skb, header_len); |
| 378 | skb_trim(skb, le16_to_cpu(hdr->len)); |
Christian Lamparter | e0f114e | 2009-07-07 19:08:07 +0200 | [diff] [blame] | 379 | if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS)) |
| 380 | p54_pspoll_workaround(priv, skb); |
| 381 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 382 | ieee80211_rx_irqsafe(priv->hw, skb); |
| 383 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 384 | ieee80211_queue_delayed_work(priv->hw, &priv->work, |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 385 | msecs_to_jiffies(P54_STATISTICS_UPDATE)); |
| 386 | |
| 387 | return -1; |
| 388 | } |
| 389 | |
| 390 | static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb) |
| 391 | { |
| 392 | struct p54_hdr *hdr = (struct p54_hdr *) skb->data; |
| 393 | struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data; |
| 394 | struct ieee80211_tx_info *info; |
| 395 | struct p54_hdr *entry_hdr; |
| 396 | struct p54_tx_data *entry_data; |
| 397 | struct sk_buff *entry; |
| 398 | unsigned int pad = 0, frame_len; |
| 399 | int count, idx; |
| 400 | |
| 401 | entry = p54_find_and_unlink_skb(priv, hdr->req_id); |
| 402 | if (unlikely(!entry)) |
| 403 | return ; |
| 404 | |
| 405 | frame_len = entry->len; |
| 406 | info = IEEE80211_SKB_CB(entry); |
| 407 | entry_hdr = (struct p54_hdr *) entry->data; |
| 408 | entry_data = (struct p54_tx_data *) entry_hdr->data; |
| 409 | priv->stats.dot11ACKFailureCount += payload->tries - 1; |
| 410 | |
| 411 | /* |
| 412 | * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are |
| 413 | * generated by the driver. Therefore tx_status is bogus |
| 414 | * and we don't want to confuse the mac80211 stack. |
| 415 | */ |
| 416 | if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) { |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 417 | dev_kfree_skb_any(entry); |
| 418 | return ; |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * Clear manually, ieee80211_tx_info_clear_status would |
| 423 | * clear the counts too and we need them. |
| 424 | */ |
| 425 | memset(&info->status.ampdu_ack_len, 0, |
| 426 | sizeof(struct ieee80211_tx_info) - |
| 427 | offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); |
| 428 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, |
| 429 | status.ampdu_ack_len) != 23); |
| 430 | |
| 431 | if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) |
| 432 | pad = entry_data->align[0]; |
| 433 | |
| 434 | /* walk through the rates array and adjust the counts */ |
| 435 | count = payload->tries; |
| 436 | for (idx = 0; idx < 4; idx++) { |
| 437 | if (count >= info->status.rates[idx].count) { |
| 438 | count -= info->status.rates[idx].count; |
| 439 | } else if (count > 0) { |
| 440 | info->status.rates[idx].count = count; |
| 441 | count = 0; |
| 442 | } else { |
| 443 | info->status.rates[idx].idx = -1; |
| 444 | info->status.rates[idx].count = 0; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && |
| 449 | (!payload->status)) |
| 450 | info->flags |= IEEE80211_TX_STAT_ACK; |
| 451 | if (payload->status & P54_TX_PSM_CANCELLED) |
| 452 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
| 453 | info->status.ack_signal = p54_rssi_to_dbm(priv, |
| 454 | (int)payload->ack_rssi); |
| 455 | |
| 456 | /* Undo all changes to the frame. */ |
| 457 | switch (entry_data->key_type) { |
| 458 | case P54_CRYPTO_TKIPMICHAEL: { |
| 459 | u8 *iv = (u8 *)(entry_data->align + pad + |
| 460 | entry_data->crypt_offset); |
| 461 | |
| 462 | /* Restore the original TKIP IV. */ |
| 463 | iv[2] = iv[0]; |
| 464 | iv[0] = iv[1]; |
| 465 | iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */ |
| 466 | |
| 467 | frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */ |
| 468 | break; |
| 469 | } |
| 470 | case P54_CRYPTO_AESCCMP: |
| 471 | frame_len -= 8; /* remove CCMP_MIC */ |
| 472 | break; |
| 473 | case P54_CRYPTO_WEP: |
| 474 | frame_len -= 4; /* remove WEP_ICV */ |
| 475 | break; |
| 476 | } |
| 477 | |
| 478 | skb_trim(entry, frame_len); |
| 479 | skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data)); |
| 480 | ieee80211_tx_status_irqsafe(priv->hw, entry); |
| 481 | } |
| 482 | |
| 483 | static void p54_rx_eeprom_readback(struct p54_common *priv, |
| 484 | struct sk_buff *skb) |
| 485 | { |
| 486 | struct p54_hdr *hdr = (struct p54_hdr *) skb->data; |
| 487 | struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data; |
| 488 | struct sk_buff *tmp; |
| 489 | |
| 490 | if (!priv->eeprom) |
| 491 | return ; |
| 492 | |
| 493 | if (priv->fw_var >= 0x509) { |
| 494 | memcpy(priv->eeprom, eeprom->v2.data, |
| 495 | le16_to_cpu(eeprom->v2.len)); |
| 496 | } else { |
| 497 | memcpy(priv->eeprom, eeprom->v1.data, |
| 498 | le16_to_cpu(eeprom->v1.len)); |
| 499 | } |
| 500 | |
| 501 | priv->eeprom = NULL; |
| 502 | tmp = p54_find_and_unlink_skb(priv, hdr->req_id); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 503 | dev_kfree_skb_any(tmp); |
| 504 | complete(&priv->eeprom_comp); |
| 505 | } |
| 506 | |
| 507 | static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb) |
| 508 | { |
| 509 | struct p54_hdr *hdr = (struct p54_hdr *) skb->data; |
| 510 | struct p54_statistics *stats = (struct p54_statistics *) hdr->data; |
| 511 | struct sk_buff *tmp; |
| 512 | u32 tsf32; |
| 513 | |
| 514 | if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) |
| 515 | return ; |
| 516 | |
| 517 | tsf32 = le32_to_cpu(stats->tsf32); |
| 518 | if (tsf32 < priv->tsf_low32) |
| 519 | priv->tsf_high32++; |
| 520 | priv->tsf_low32 = tsf32; |
| 521 | |
| 522 | priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail); |
| 523 | priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success); |
| 524 | priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs); |
| 525 | |
| 526 | priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise)); |
| 527 | |
| 528 | tmp = p54_find_and_unlink_skb(priv, hdr->req_id); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 529 | dev_kfree_skb_any(tmp); |
| 530 | } |
| 531 | |
| 532 | static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb) |
| 533 | { |
| 534 | struct p54_hdr *hdr = (struct p54_hdr *) skb->data; |
| 535 | struct p54_trap *trap = (struct p54_trap *) hdr->data; |
| 536 | u16 event = le16_to_cpu(trap->event); |
| 537 | u16 freq = le16_to_cpu(trap->frequency); |
| 538 | |
| 539 | switch (event) { |
| 540 | case P54_TRAP_BEACON_TX: |
| 541 | break; |
| 542 | case P54_TRAP_RADAR: |
Joe Perches | 5db5584 | 2010-08-11 19:11:19 -0700 | [diff] [blame] | 543 | wiphy_info(priv->hw->wiphy, "radar (freq:%d MHz)\n", freq); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 544 | break; |
| 545 | case P54_TRAP_NO_BEACON: |
| 546 | if (priv->vif) |
| 547 | ieee80211_beacon_loss(priv->vif); |
| 548 | break; |
| 549 | case P54_TRAP_SCAN: |
| 550 | break; |
| 551 | case P54_TRAP_TBTT: |
| 552 | break; |
| 553 | case P54_TRAP_TIMER: |
| 554 | break; |
Christian Lamparter | 6208f8b | 2009-08-07 19:39:05 +0200 | [diff] [blame] | 555 | case P54_TRAP_FAA_RADIO_OFF: |
| 556 | wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); |
| 557 | break; |
| 558 | case P54_TRAP_FAA_RADIO_ON: |
| 559 | wiphy_rfkill_set_hw_state(priv->hw->wiphy, false); |
| 560 | break; |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 561 | default: |
Joe Perches | c96c31e | 2010-07-26 14:39:58 -0700 | [diff] [blame] | 562 | wiphy_info(priv->hw->wiphy, "received event:%x freq:%d\n", |
| 563 | event, freq); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 564 | break; |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | static int p54_rx_control(struct p54_common *priv, struct sk_buff *skb) |
| 569 | { |
| 570 | struct p54_hdr *hdr = (struct p54_hdr *) skb->data; |
| 571 | |
| 572 | switch (le16_to_cpu(hdr->type)) { |
| 573 | case P54_CONTROL_TYPE_TXDONE: |
| 574 | p54_rx_frame_sent(priv, skb); |
| 575 | break; |
| 576 | case P54_CONTROL_TYPE_TRAP: |
| 577 | p54_rx_trap(priv, skb); |
| 578 | break; |
| 579 | case P54_CONTROL_TYPE_BBP: |
| 580 | break; |
| 581 | case P54_CONTROL_TYPE_STAT_READBACK: |
| 582 | p54_rx_stats(priv, skb); |
| 583 | break; |
| 584 | case P54_CONTROL_TYPE_EEPROM_READBACK: |
| 585 | p54_rx_eeprom_readback(priv, skb); |
| 586 | break; |
| 587 | default: |
Joe Perches | c96c31e | 2010-07-26 14:39:58 -0700 | [diff] [blame] | 588 | wiphy_debug(priv->hw->wiphy, |
| 589 | "not handling 0x%02x type control frame\n", |
| 590 | le16_to_cpu(hdr->type)); |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 591 | break; |
| 592 | } |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | /* returns zero if skb can be reused */ |
| 597 | int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb) |
| 598 | { |
| 599 | struct p54_common *priv = dev->priv; |
| 600 | u16 type = le16_to_cpu(*((__le16 *)skb->data)); |
| 601 | |
| 602 | if (type & P54_HDR_FLAG_CONTROL) |
| 603 | return p54_rx_control(priv, skb); |
| 604 | else |
| 605 | return p54_rx_data(priv, skb); |
| 606 | } |
| 607 | EXPORT_SYMBOL_GPL(p54_rx); |
| 608 | |
| 609 | static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb, |
| 610 | struct ieee80211_tx_info *info, u8 *queue, |
| 611 | u32 *extra_len, u16 *flags, u16 *aid, |
| 612 | bool *burst_possible) |
| 613 | { |
| 614 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 615 | |
| 616 | if (ieee80211_is_data_qos(hdr->frame_control)) |
| 617 | *burst_possible = true; |
| 618 | else |
| 619 | *burst_possible = false; |
| 620 | |
| 621 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) |
| 622 | *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR; |
| 623 | |
Johannes Berg | 3fa5205 | 2009-07-24 13:23:09 +0200 | [diff] [blame] | 624 | if (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE) |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 625 | *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL; |
| 626 | |
Christian Lamparter | 90d6f92 | 2009-08-20 20:22:01 +0200 | [diff] [blame] | 627 | if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) |
| 628 | *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL; |
| 629 | |
Christian Lamparter | 0a5fb84 | 2009-06-23 10:39:12 -0500 | [diff] [blame] | 630 | *queue = skb_get_queue_mapping(skb) + P54_QUEUE_DATA; |
| 631 | |
| 632 | switch (priv->mode) { |
| 633 | case NL80211_IFTYPE_MONITOR: |
| 634 | /* |
| 635 | * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for |
| 636 | * every frame in promiscuous/monitor mode. |
| 637 | * see STSW45x0C LMAC API - page 12. |
| 638 | */ |
| 639 | *aid = 0; |
| 640 | *flags |= P54_HDR_FLAG_DATA_OUT_PROMISC; |
| 641 | break; |
| 642 | case NL80211_IFTYPE_STATION: |
| 643 | *aid = 1; |
| 644 | break; |
| 645 | case NL80211_IFTYPE_AP: |
| 646 | case NL80211_IFTYPE_ADHOC: |
| 647 | case NL80211_IFTYPE_MESH_POINT: |
| 648 | if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { |
| 649 | *aid = 0; |
| 650 | *queue = P54_QUEUE_CAB; |
| 651 | return; |
| 652 | } |
| 653 | |
| 654 | if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) { |
| 655 | if (ieee80211_is_probe_resp(hdr->frame_control)) { |
| 656 | *aid = 0; |
| 657 | *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP | |
| 658 | P54_HDR_FLAG_DATA_OUT_NOCANCEL; |
| 659 | return; |
| 660 | } else if (ieee80211_is_beacon(hdr->frame_control)) { |
| 661 | *aid = 0; |
| 662 | |
| 663 | if (info->flags & IEEE80211_TX_CTL_INJECTED) { |
| 664 | /* |
| 665 | * Injecting beacons on top of a AP is |
| 666 | * not a good idea... nevertheless, |
| 667 | * it should be doable. |
| 668 | */ |
| 669 | |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP; |
| 674 | *queue = P54_QUEUE_BEACON; |
| 675 | *extra_len = IEEE80211_MAX_TIM_LEN; |
| 676 | return; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | if (info->control.sta) |
| 681 | *aid = info->control.sta->aid; |
| 682 | break; |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | static u8 p54_convert_algo(enum ieee80211_key_alg alg) |
| 687 | { |
| 688 | switch (alg) { |
| 689 | case ALG_WEP: |
| 690 | return P54_CRYPTO_WEP; |
| 691 | case ALG_TKIP: |
| 692 | return P54_CRYPTO_TKIPMICHAEL; |
| 693 | case ALG_CCMP: |
| 694 | return P54_CRYPTO_AESCCMP; |
| 695 | default: |
| 696 | return 0; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | int p54_tx_80211(struct ieee80211_hw *dev, struct sk_buff *skb) |
| 701 | { |
| 702 | struct p54_common *priv = dev->priv; |
| 703 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 704 | struct p54_tx_info *p54info; |
| 705 | struct p54_hdr *hdr; |
| 706 | struct p54_tx_data *txhdr; |
| 707 | unsigned int padding, len, extra_len; |
| 708 | int i, j, ridx; |
| 709 | u16 hdr_flags = 0, aid = 0; |
| 710 | u8 rate, queue = 0, crypt_offset = 0; |
| 711 | u8 cts_rate = 0x20; |
| 712 | u8 rc_flags; |
| 713 | u8 calculated_tries[4]; |
| 714 | u8 nrates = 0, nremaining = 8; |
| 715 | bool burst_allowed = false; |
| 716 | |
| 717 | p54_tx_80211_header(priv, skb, info, &queue, &extra_len, |
| 718 | &hdr_flags, &aid, &burst_allowed); |
| 719 | |
| 720 | if (p54_tx_qos_accounting_alloc(priv, skb, queue)) { |
| 721 | if (!IS_QOS_QUEUE(queue)) { |
| 722 | dev_kfree_skb_any(skb); |
| 723 | return NETDEV_TX_OK; |
| 724 | } else { |
| 725 | return NETDEV_TX_BUSY; |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3; |
| 730 | len = skb->len; |
| 731 | |
| 732 | if (info->control.hw_key) { |
| 733 | crypt_offset = ieee80211_get_hdrlen_from_skb(skb); |
| 734 | if (info->control.hw_key->alg == ALG_TKIP) { |
| 735 | u8 *iv = (u8 *)(skb->data + crypt_offset); |
| 736 | /* |
| 737 | * The firmware excepts that the IV has to have |
| 738 | * this special format |
| 739 | */ |
| 740 | iv[1] = iv[0]; |
| 741 | iv[0] = iv[2]; |
| 742 | iv[2] = 0; |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding); |
| 747 | hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr)); |
| 748 | |
| 749 | if (padding) |
| 750 | hdr_flags |= P54_HDR_FLAG_DATA_ALIGN; |
| 751 | hdr->type = cpu_to_le16(aid); |
| 752 | hdr->rts_tries = info->control.rates[0].count; |
| 753 | |
| 754 | /* |
| 755 | * we register the rates in perfect order, and |
| 756 | * RTS/CTS won't happen on 5 GHz |
| 757 | */ |
| 758 | cts_rate = info->control.rts_cts_rate_idx; |
| 759 | |
| 760 | memset(&txhdr->rateset, 0, sizeof(txhdr->rateset)); |
| 761 | |
| 762 | /* see how many rates got used */ |
| 763 | for (i = 0; i < dev->max_rates; i++) { |
| 764 | if (info->control.rates[i].idx < 0) |
| 765 | break; |
| 766 | nrates++; |
| 767 | } |
| 768 | |
| 769 | /* limit tries to 8/nrates per rate */ |
| 770 | for (i = 0; i < nrates; i++) { |
| 771 | /* |
| 772 | * The magic expression here is equivalent to 8/nrates for |
| 773 | * all values that matter, but avoids division and jumps. |
| 774 | * Note that nrates can only take the values 1 through 4. |
| 775 | */ |
| 776 | calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1, |
| 777 | info->control.rates[i].count); |
| 778 | nremaining -= calculated_tries[i]; |
| 779 | } |
| 780 | |
| 781 | /* if there are tries left, distribute from back to front */ |
| 782 | for (i = nrates - 1; nremaining > 0 && i >= 0; i--) { |
| 783 | int tmp = info->control.rates[i].count - calculated_tries[i]; |
| 784 | |
| 785 | if (tmp <= 0) |
| 786 | continue; |
| 787 | /* RC requested more tries at this rate */ |
| 788 | |
| 789 | tmp = min_t(int, tmp, nremaining); |
| 790 | calculated_tries[i] += tmp; |
| 791 | nremaining -= tmp; |
| 792 | } |
| 793 | |
| 794 | ridx = 0; |
| 795 | for (i = 0; i < nrates && ridx < 8; i++) { |
| 796 | /* we register the rates in perfect order */ |
| 797 | rate = info->control.rates[i].idx; |
| 798 | if (info->band == IEEE80211_BAND_5GHZ) |
| 799 | rate += 4; |
| 800 | |
| 801 | /* store the count we actually calculated for TX status */ |
| 802 | info->control.rates[i].count = calculated_tries[i]; |
| 803 | |
| 804 | rc_flags = info->control.rates[i].flags; |
| 805 | if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) { |
| 806 | rate |= 0x10; |
| 807 | cts_rate |= 0x10; |
| 808 | } |
| 809 | if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
| 810 | burst_allowed = false; |
| 811 | rate |= 0x40; |
| 812 | } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
| 813 | rate |= 0x20; |
| 814 | burst_allowed = false; |
| 815 | } |
| 816 | for (j = 0; j < calculated_tries[i] && ridx < 8; j++) { |
| 817 | txhdr->rateset[ridx] = rate; |
| 818 | ridx++; |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | if (burst_allowed) |
| 823 | hdr_flags |= P54_HDR_FLAG_DATA_OUT_BURST; |
| 824 | |
| 825 | /* TODO: enable bursting */ |
| 826 | hdr->flags = cpu_to_le16(hdr_flags); |
| 827 | hdr->tries = ridx; |
| 828 | txhdr->rts_rate_idx = 0; |
| 829 | if (info->control.hw_key) { |
| 830 | txhdr->key_type = p54_convert_algo(info->control.hw_key->alg); |
| 831 | txhdr->key_len = min((u8)16, info->control.hw_key->keylen); |
| 832 | memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len); |
| 833 | if (info->control.hw_key->alg == ALG_TKIP) { |
| 834 | /* reserve space for the MIC key */ |
| 835 | len += 8; |
| 836 | memcpy(skb_put(skb, 8), &(info->control.hw_key->key |
| 837 | [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8); |
| 838 | } |
| 839 | /* reserve some space for ICV */ |
| 840 | len += info->control.hw_key->icv_len; |
| 841 | memset(skb_put(skb, info->control.hw_key->icv_len), 0, |
| 842 | info->control.hw_key->icv_len); |
| 843 | } else { |
| 844 | txhdr->key_type = 0; |
| 845 | txhdr->key_len = 0; |
| 846 | } |
| 847 | txhdr->crypt_offset = crypt_offset; |
| 848 | txhdr->hw_queue = queue; |
| 849 | txhdr->backlog = priv->tx_stats[queue].len - 1; |
| 850 | memset(txhdr->durations, 0, sizeof(txhdr->durations)); |
| 851 | txhdr->tx_antenna = ((info->antenna_sel_tx == 0) ? |
| 852 | 2 : info->antenna_sel_tx - 1) & priv->tx_diversity_mask; |
| 853 | if (priv->rxhw == 5) { |
| 854 | txhdr->longbow.cts_rate = cts_rate; |
| 855 | txhdr->longbow.output_power = cpu_to_le16(priv->output_power); |
| 856 | } else { |
| 857 | txhdr->normal.output_power = priv->output_power; |
| 858 | txhdr->normal.cts_rate = cts_rate; |
| 859 | } |
| 860 | if (padding) |
| 861 | txhdr->align[0] = padding; |
| 862 | |
| 863 | hdr->len = cpu_to_le16(len); |
| 864 | /* modifies skb->cb and with it info, so must be last! */ |
| 865 | p54info = (void *) info->rate_driver_data; |
| 866 | p54info->extra_len = extra_len; |
| 867 | |
| 868 | p54_tx(priv, skb); |
| 869 | return NETDEV_TX_OK; |
| 870 | } |