1 /* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c) 2 * 3 * A driver for Hermes or Prism 2 chipset based PCMCIA wireless 4 * adaptors, with Lucent/Agere, Intersil or Symbol firmware. 5 * 6 * Current maintainers (as of 29 September 2003) are: 7 * Pavel Roskin <proski AT gnu.org> 8 * and David Gibson <hermes AT gibson.dropbear.id.au> 9 * 10 * (C) Copyright David Gibson, IBM Corporation 2001-2003. 11 * Copyright (C) 2000 David Gibson, Linuxcare Australia. 12 * With some help from : 13 * Copyright (C) 2001 Jean Tourrilhes, HP Labs 14 * Copyright (C) 2001 Benjamin Herrenschmidt 15 * 16 * Based on dummy_cs.c 1.27 2000/06/12 21:27:25 17 * 18 * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy 19 * AT fasta.fh-dortmund.de> 20 * http://www.stud.fh-dortmund.de/~andy/wvlan/ 21 * 22 * The contents of this file are subject to the Mozilla Public License 23 * Version 1.1 (the "License"); you may not use this file except in 24 * compliance with the License. You may obtain a copy of the License 25 * at http://www.mozilla.org/MPL/ 26 * 27 * Software distributed under the License is distributed on an "AS IS" 28 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 29 * the License for the specific language governing rights and 30 * limitations under the License. 31 * 32 * The initial developer of the original code is David A. Hinds 33 * <dahinds AT users.sourceforge.net>. Portions created by David 34 * A. Hinds are Copyright (C) 1999 David A. Hinds. All Rights 35 * Reserved. 36 * 37 * Alternatively, the contents of this file may be used under the 38 * terms of the GNU General Public License version 2 (the "GPL"), in 39 * which case the provisions of the GPL are applicable instead of the 40 * above. If you wish to allow the use of your version of this file 41 * only under the terms of the GPL and not to allow others to use your 42 * version of this file under the MPL, indicate your decision by 43 * deleting the provisions above and replace them with the notice and 44 * other provisions required by the GPL. If you do not delete the 45 * provisions above, a recipient may use your version of this file 46 * under either the MPL or the GPL. */ 47 48 /* 49 * TODO 50 * o Handle de-encapsulation within network layer, provide 802.11 51 * headers (patch from Thomas 'Dent' Mirlacher) 52 * o Fix possible races in SPY handling. 53 * o Disconnect wireless extensions from fundamental configuration. 54 * o (maybe) Software WEP support (patch from Stano Meduna). 55 * o (maybe) Use multiple Tx buffers - driver handling queue 56 * rather than firmware. 57 */ 58 59 /* Locking and synchronization: 60 * 61 * The basic principle is that everything is serialized through a 62 * single spinlock, priv->lock. The lock is used in user, bh and irq 63 * context, so when taken outside hardirq context it should always be 64 * taken with interrupts disabled. The lock protects both the 65 * hardware and the struct orinoco_private. 66 * 67 * Another flag, priv->hw_unavailable indicates that the hardware is 68 * unavailable for an extended period of time (e.g. suspended, or in 69 * the middle of a hard reset). This flag is protected by the 70 * spinlock. All code which touches the hardware should check the 71 * flag after taking the lock, and if it is set, give up on whatever 72 * they are doing and drop the lock again. The orinoco_lock() 73 * function handles this (it unlocks and returns -EBUSY if 74 * hw_unavailable is non-zero). 75 */ 76 77 #define DRIVER_NAME "orinoco" 78 79 #include <linux/module.h> 80 #include <linux/kernel.h> 81 #include <linux/slab.h> 82 #include <linux/init.h> 83 #include <linux/delay.h> 84 #include <linux/device.h> 85 #include <linux/netdevice.h> 86 #include <linux/etherdevice.h> 87 #include <linux/suspend.h> 88 #include <linux/if_arp.h> 89 #include <linux/wireless.h> 90 #include <linux/ieee80211.h> 91 #include <net/iw_handler.h> 92 #include <net/cfg80211.h> 93 94 #include "hermes_rid.h" 95 #include "hermes_dld.h" 96 #include "hw.h" 97 #include "scan.h" 98 #include "mic.h" 99 #include "fw.h" 100 #include "wext.h" 101 #include "cfg.h" 102 #include "main.h" 103 104 #include "orinoco.h" 105 106 /********************************************************************/ 107 /* Module information */ 108 /********************************************************************/ 109 110 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & " 111 "David Gibson <hermes@gibson.dropbear.id.au>"); 112 MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based " 113 "and similar wireless cards"); 114 MODULE_LICENSE("Dual MPL/GPL"); 115 116 /* Level of debugging. Used in the macros in orinoco.h */ 117 #ifdef ORINOCO_DEBUG 118 int orinoco_debug = ORINOCO_DEBUG; 119 EXPORT_SYMBOL(orinoco_debug); 120 module_param(orinoco_debug, int, 0644); 121 MODULE_PARM_DESC(orinoco_debug, "Debug level"); 122 #endif 123 124 static bool suppress_linkstatus; /* = 0 */ 125 module_param(suppress_linkstatus, bool, 0644); 126 MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes"); 127 128 static int ignore_disconnect; /* = 0 */ 129 module_param(ignore_disconnect, int, 0644); 130 MODULE_PARM_DESC(ignore_disconnect, 131 "Don't report lost link to the network layer"); 132 133 int force_monitor; /* = 0 */ 134 module_param(force_monitor, int, 0644); 135 MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions"); 136 137 /********************************************************************/ 138 /* Internal constants */ 139 /********************************************************************/ 140 141 /* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */ 142 static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00}; 143 #define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2) 144 145 #define ORINOCO_MIN_MTU 256 146 #define ORINOCO_MAX_MTU (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD) 147 148 #define MAX_IRQLOOPS_PER_IRQ 10 149 #define MAX_IRQLOOPS_PER_JIFFY (20000 / HZ) /* Based on a guestimate of 150 * how many events the 151 * device could 152 * legitimately generate */ 153 154 #define DUMMY_FID 0xFFFF 155 156 /*#define MAX_MULTICAST(priv) (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \ 157 HERMES_MAX_MULTICAST : 0)*/ 158 #define MAX_MULTICAST(priv) (HERMES_MAX_MULTICAST) 159 160 #define ORINOCO_INTEN (HERMES_EV_RX | HERMES_EV_ALLOC \ 161 | HERMES_EV_TX | HERMES_EV_TXEXC \ 162 | HERMES_EV_WTERR | HERMES_EV_INFO \ 163 | HERMES_EV_INFDROP) 164 165 /********************************************************************/ 166 /* Data types */ 167 /********************************************************************/ 168 169 /* Beginning of the Tx descriptor, used in TxExc handling */ 170 struct hermes_txexc_data { 171 struct hermes_tx_descriptor desc; 172 __le16 frame_ctl; 173 __le16 duration_id; 174 u8 addr1[ETH_ALEN]; 175 } __packed; 176 177 /* Rx frame header except compatibility 802.3 header */ 178 struct hermes_rx_descriptor { 179 /* Control */ 180 __le16 status; 181 __le32 time; 182 u8 silence; 183 u8 signal; 184 u8 rate; 185 u8 rxflow; 186 __le32 reserved; 187 188 /* 802.11 header */ 189 __le16 frame_ctl; 190 __le16 duration_id; 191 u8 addr1[ETH_ALEN]; 192 u8 addr2[ETH_ALEN]; 193 u8 addr3[ETH_ALEN]; 194 __le16 seq_ctl; 195 u8 addr4[ETH_ALEN]; 196 197 /* Data length */ 198 __le16 data_len; 199 } __packed; 200 201 struct orinoco_rx_data { 202 struct hermes_rx_descriptor *desc; 203 struct sk_buff *skb; 204 struct list_head list; 205 }; 206 207 struct orinoco_scan_data { 208 void *buf; 209 size_t len; 210 int type; 211 struct list_head list; 212 }; 213 214 /********************************************************************/ 215 /* Function prototypes */ 216 /********************************************************************/ 217 218 static int __orinoco_set_multicast_list(struct net_device *dev); 219 static int __orinoco_up(struct orinoco_private *priv); 220 static int __orinoco_down(struct orinoco_private *priv); 221 static int __orinoco_commit(struct orinoco_private *priv); 222 223 /********************************************************************/ 224 /* Internal helper functions */ 225 /********************************************************************/ 226 227 void set_port_type(struct orinoco_private *priv) 228 { 229 switch (priv->iw_mode) { 230 case NL80211_IFTYPE_STATION: 231 priv->port_type = 1; 232 priv->createibss = 0; 233 break; 234 case NL80211_IFTYPE_ADHOC: 235 if (priv->prefer_port3) { 236 priv->port_type = 3; 237 priv->createibss = 0; 238 } else { 239 priv->port_type = priv->ibss_port; 240 priv->createibss = 1; 241 } 242 break; 243 case NL80211_IFTYPE_MONITOR: 244 priv->port_type = 3; 245 priv->createibss = 0; 246 break; 247 default: 248 printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n", 249 priv->ndev->name); 250 } 251 } 252 253 /********************************************************************/ 254 /* Device methods */ 255 /********************************************************************/ 256 257 int orinoco_open(struct net_device *dev) 258 { 259 struct orinoco_private *priv = ndev_priv(dev); 260 unsigned long flags; 261 int err; 262 263 if (orinoco_lock(priv, &flags) != 0) 264 return -EBUSY; 265 266 err = __orinoco_up(priv); 267 268 if (!err) 269 priv->open = 1; 270 271 orinoco_unlock(priv, &flags); 272 273 return err; 274 } 275 EXPORT_SYMBOL(orinoco_open); 276 277 int orinoco_stop(struct net_device *dev) 278 { 279 struct orinoco_private *priv = ndev_priv(dev); 280 int err = 0; 281 282 /* We mustn't use orinoco_lock() here, because we need to be 283 able to close the interface even if hw_unavailable is set 284 (e.g. as we're released after a PC Card removal) */ 285 orinoco_lock_irq(priv); 286 287 priv->open = 0; 288 289 err = __orinoco_down(priv); 290 291 orinoco_unlock_irq(priv); 292 293 return err; 294 } 295 EXPORT_SYMBOL(orinoco_stop); 296 297 void orinoco_set_multicast_list(struct net_device *dev) 298 { 299 struct orinoco_private *priv = ndev_priv(dev); 300 unsigned long flags; 301 302 if (orinoco_lock(priv, &flags) != 0) { 303 printk(KERN_DEBUG "%s: orinoco_set_multicast_list() " 304 "called when hw_unavailable\n", dev->name); 305 return; 306 } 307 308 __orinoco_set_multicast_list(dev); 309 orinoco_unlock(priv, &flags); 310 } 311 EXPORT_SYMBOL(orinoco_set_multicast_list); 312 313 int orinoco_change_mtu(struct net_device *dev, int new_mtu) 314 { 315 struct orinoco_private *priv = ndev_priv(dev); 316 317 /* MTU + encapsulation + header length */ 318 if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) > 319 (priv->nicbuf_size - ETH_HLEN)) 320 return -EINVAL; 321 322 dev->mtu = new_mtu; 323 324 return 0; 325 } 326 EXPORT_SYMBOL(orinoco_change_mtu); 327 328 /********************************************************************/ 329 /* Tx path */ 330 /********************************************************************/ 331 332 /* Add encapsulation and MIC to the existing SKB. 333 * The main xmit routine will then send the whole lot to the card. 334 * Need 8 bytes headroom 335 * Need 8 bytes tailroom 336 * 337 * With encapsulated ethernet II frame 338 * -------- 339 * 803.3 header (14 bytes) 340 * dst[6] 341 * -------- src[6] 342 * 803.3 header (14 bytes) len[2] 343 * dst[6] 803.2 header (8 bytes) 344 * src[6] encaps[6] 345 * len[2] <- leave alone -> len[2] 346 * -------- -------- <-- 0 347 * Payload Payload 348 * ... ... 349 * 350 * -------- -------- 351 * MIC (8 bytes) 352 * -------- 353 * 354 * returns 0 on success, -ENOMEM on error. 355 */ 356 int orinoco_process_xmit_skb(struct sk_buff *skb, 357 struct net_device *dev, 358 struct orinoco_private *priv, 359 int *tx_control, 360 u8 *mic_buf) 361 { 362 struct orinoco_tkip_key *key; 363 struct ethhdr *eh; 364 int do_mic; 365 366 key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key; 367 368 do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) && 369 (key != NULL)); 370 371 if (do_mic) 372 *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) | 373 HERMES_TXCTRL_MIC; 374 375 eh = (struct ethhdr *)skb->data; 376 377 /* Encapsulate Ethernet-II frames */ 378 if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */ 379 struct header_struct { 380 struct ethhdr eth; /* 802.3 header */ 381 u8 encap[6]; /* 802.2 header */ 382 } __packed hdr; 383 int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN); 384 385 if (skb_headroom(skb) < ENCAPS_OVERHEAD) { 386 if (net_ratelimit()) 387 printk(KERN_ERR 388 "%s: Not enough headroom for 802.2 headers %d\n", 389 dev->name, skb_headroom(skb)); 390 return -ENOMEM; 391 } 392 393 /* Fill in new header */ 394 memcpy(&hdr.eth, eh, 2 * ETH_ALEN); 395 hdr.eth.h_proto = htons(len); 396 memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr)); 397 398 /* Make room for the new header, and copy it in */ 399 eh = skb_push(skb, ENCAPS_OVERHEAD); 400 memcpy(eh, &hdr, sizeof(hdr)); 401 } 402 403 /* Calculate Michael MIC */ 404 if (do_mic) { 405 size_t len = skb->len - ETH_HLEN; 406 u8 *mic = &mic_buf[0]; 407 408 /* Have to write to an even address, so copy the spare 409 * byte across */ 410 if (skb->len % 2) { 411 *mic = skb->data[skb->len - 1]; 412 mic++; 413 } 414 415 orinoco_mic(priv->tx_tfm_mic, key->tx_mic, 416 eh->h_dest, eh->h_source, 0 /* priority */, 417 skb->data + ETH_HLEN, 418 len, mic); 419 } 420 421 return 0; 422 } 423 EXPORT_SYMBOL(orinoco_process_xmit_skb); 424 425 static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev) 426 { 427 struct orinoco_private *priv = ndev_priv(dev); 428 struct net_device_stats *stats = &dev->stats; 429 struct hermes *hw = &priv->hw; 430 int err = 0; 431 u16 txfid = priv->txfid; 432 int tx_control; 433 unsigned long flags; 434 u8 mic_buf[MICHAEL_MIC_LEN + 1]; 435 436 if (!netif_running(dev)) { 437 printk(KERN_ERR "%s: Tx on stopped device!\n", 438 dev->name); 439 return NETDEV_TX_BUSY; 440 } 441 442 if (netif_queue_stopped(dev)) { 443 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n", 444 dev->name); 445 return NETDEV_TX_BUSY; 446 } 447 448 if (orinoco_lock(priv, &flags) != 0) { 449 printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n", 450 dev->name); 451 return NETDEV_TX_BUSY; 452 } 453 454 if (!netif_carrier_ok(dev) || 455 (priv->iw_mode == NL80211_IFTYPE_MONITOR)) { 456 /* Oops, the firmware hasn't established a connection, 457 silently drop the packet (this seems to be the 458 safest approach). */ 459 goto drop; 460 } 461 462 /* Check packet length */ 463 if (skb->len < ETH_HLEN) 464 goto drop; 465 466 tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX; 467 468 err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control, 469 &mic_buf[0]); 470 if (err) 471 goto drop; 472 473 if (priv->has_alt_txcntl) { 474 /* WPA enabled firmwares have tx_cntl at the end of 475 * the 802.11 header. So write zeroed descriptor and 476 * 802.11 header at the same time 477 */ 478 char desc[HERMES_802_3_OFFSET]; 479 __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET]; 480 481 memset(&desc, 0, sizeof(desc)); 482 483 *txcntl = cpu_to_le16(tx_control); 484 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), 485 txfid, 0); 486 if (err) { 487 if (net_ratelimit()) 488 printk(KERN_ERR "%s: Error %d writing Tx " 489 "descriptor to BAP\n", dev->name, err); 490 goto busy; 491 } 492 } else { 493 struct hermes_tx_descriptor desc; 494 495 memset(&desc, 0, sizeof(desc)); 496 497 desc.tx_control = cpu_to_le16(tx_control); 498 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), 499 txfid, 0); 500 if (err) { 501 if (net_ratelimit()) 502 printk(KERN_ERR "%s: Error %d writing Tx " 503 "descriptor to BAP\n", dev->name, err); 504 goto busy; 505 } 506 507 /* Clear the 802.11 header and data length fields - some 508 * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused 509 * if this isn't done. */ 510 hermes_clear_words(hw, HERMES_DATA0, 511 HERMES_802_3_OFFSET - HERMES_802_11_OFFSET); 512 } 513 514 err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len, 515 txfid, HERMES_802_3_OFFSET); 516 if (err) { 517 printk(KERN_ERR "%s: Error %d writing packet to BAP\n", 518 dev->name, err); 519 goto busy; 520 } 521 522 if (tx_control & HERMES_TXCTRL_MIC) { 523 size_t offset = HERMES_802_3_OFFSET + skb->len; 524 size_t len = MICHAEL_MIC_LEN; 525 526 if (offset % 2) { 527 offset--; 528 len++; 529 } 530 err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len, 531 txfid, offset); 532 if (err) { 533 printk(KERN_ERR "%s: Error %d writing MIC to BAP\n", 534 dev->name, err); 535 goto busy; 536 } 537 } 538 539 /* Finally, we actually initiate the send */ 540 netif_stop_queue(dev); 541 542 err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL, 543 txfid, NULL); 544 if (err) { 545 netif_start_queue(dev); 546 if (net_ratelimit()) 547 printk(KERN_ERR "%s: Error %d transmitting packet\n", 548 dev->name, err); 549 goto busy; 550 } 551 552 stats->tx_bytes += HERMES_802_3_OFFSET + skb->len; 553 goto ok; 554 555 drop: 556 stats->tx_errors++; 557 stats->tx_dropped++; 558 559 ok: 560 orinoco_unlock(priv, &flags); 561 dev_kfree_skb(skb); 562 return NETDEV_TX_OK; 563 564 busy: 565 if (err == -EIO) 566 schedule_work(&priv->reset_work); 567 orinoco_unlock(priv, &flags); 568 return NETDEV_TX_BUSY; 569 } 570 571 static void __orinoco_ev_alloc(struct net_device *dev, struct hermes *hw) 572 { 573 struct orinoco_private *priv = ndev_priv(dev); 574 u16 fid = hermes_read_regn(hw, ALLOCFID); 575 576 if (fid != priv->txfid) { 577 if (fid != DUMMY_FID) 578 printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n", 579 dev->name, fid); 580 return; 581 } 582 583 hermes_write_regn(hw, ALLOCFID, DUMMY_FID); 584 } 585 586 static void __orinoco_ev_tx(struct net_device *dev, struct hermes *hw) 587 { 588 dev->stats.tx_packets++; 589 590 netif_wake_queue(dev); 591 592 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID); 593 } 594 595 static void __orinoco_ev_txexc(struct net_device *dev, struct hermes *hw) 596 { 597 struct net_device_stats *stats = &dev->stats; 598 u16 fid = hermes_read_regn(hw, TXCOMPLFID); 599 u16 status; 600 struct hermes_txexc_data hdr; 601 int err = 0; 602 603 if (fid == DUMMY_FID) 604 return; /* Nothing's really happened */ 605 606 /* Read part of the frame header - we need status and addr1 */ 607 err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr, 608 sizeof(struct hermes_txexc_data), 609 fid, 0); 610 611 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID); 612 stats->tx_errors++; 613 614 if (err) { 615 printk(KERN_WARNING "%s: Unable to read descriptor on Tx error " 616 "(FID=%04X error %d)\n", 617 dev->name, fid, err); 618 return; 619 } 620 621 DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name, 622 err, fid); 623 624 /* We produce a TXDROP event only for retry or lifetime 625 * exceeded, because that's the only status that really mean 626 * that this particular node went away. 627 * Other errors means that *we* screwed up. - Jean II */ 628 status = le16_to_cpu(hdr.desc.status); 629 if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) { 630 union iwreq_data wrqu; 631 632 /* Copy 802.11 dest address. 633 * We use the 802.11 header because the frame may 634 * not be 802.3 or may be mangled... 635 * In Ad-Hoc mode, it will be the node address. 636 * In managed mode, it will be most likely the AP addr 637 * User space will figure out how to convert it to 638 * whatever it needs (IP address or else). 639 * - Jean II */ 640 memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN); 641 wrqu.addr.sa_family = ARPHRD_ETHER; 642 643 /* Send event to user space */ 644 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL); 645 } 646 647 netif_wake_queue(dev); 648 } 649 650 void orinoco_tx_timeout(struct net_device *dev, unsigned int txqueue) 651 { 652 struct orinoco_private *priv = ndev_priv(dev); 653 struct net_device_stats *stats = &dev->stats; 654 struct hermes *hw = &priv->hw; 655 656 printk(KERN_WARNING "%s: Tx timeout! " 657 "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n", 658 dev->name, hermes_read_regn(hw, ALLOCFID), 659 hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT)); 660 661 stats->tx_errors++; 662 663 schedule_work(&priv->reset_work); 664 } 665 EXPORT_SYMBOL(orinoco_tx_timeout); 666 667 /********************************************************************/ 668 /* Rx path (data frames) */ 669 /********************************************************************/ 670 671 /* Does the frame have a SNAP header indicating it should be 672 * de-encapsulated to Ethernet-II? */ 673 static inline int is_ethersnap(void *_hdr) 674 { 675 u8 *hdr = _hdr; 676 677 /* We de-encapsulate all packets which, a) have SNAP headers 678 * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header 679 * and where b) the OUI of the SNAP header is 00:00:00 or 680 * 00:00:f8 - we need both because different APs appear to use 681 * different OUIs for some reason */ 682 return (memcmp(hdr, &encaps_hdr, 5) == 0) 683 && ((hdr[5] == 0x00) || (hdr[5] == 0xf8)); 684 } 685 686 static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac, 687 int level, int noise) 688 { 689 struct iw_quality wstats; 690 wstats.level = level - 0x95; 691 wstats.noise = noise - 0x95; 692 wstats.qual = (level > noise) ? (level - noise) : 0; 693 wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM; 694 /* Update spy records */ 695 wireless_spy_update(dev, mac, &wstats); 696 } 697 698 static void orinoco_stat_gather(struct net_device *dev, 699 struct sk_buff *skb, 700 struct hermes_rx_descriptor *desc) 701 { 702 struct orinoco_private *priv = ndev_priv(dev); 703 704 /* Using spy support with lots of Rx packets, like in an 705 * infrastructure (AP), will really slow down everything, because 706 * the MAC address must be compared to each entry of the spy list. 707 * If the user really asks for it (set some address in the 708 * spy list), we do it, but he will pay the price. 709 * Note that to get here, you need both WIRELESS_SPY 710 * compiled in AND some addresses in the list !!! 711 */ 712 /* Note : gcc will optimise the whole section away if 713 * WIRELESS_SPY is not defined... - Jean II */ 714 if (SPY_NUMBER(priv)) { 715 orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN, 716 desc->signal, desc->silence); 717 } 718 } 719 720 /* 721 * orinoco_rx_monitor - handle received monitor frames. 722 * 723 * Arguments: 724 * dev network device 725 * rxfid received FID 726 * desc rx descriptor of the frame 727 * 728 * Call context: interrupt 729 */ 730 static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid, 731 struct hermes_rx_descriptor *desc) 732 { 733 u32 hdrlen = 30; /* return full header by default */ 734 u32 datalen = 0; 735 u16 fc; 736 int err; 737 int len; 738 struct sk_buff *skb; 739 struct orinoco_private *priv = ndev_priv(dev); 740 struct net_device_stats *stats = &dev->stats; 741 struct hermes *hw = &priv->hw; 742 743 len = le16_to_cpu(desc->data_len); 744 745 /* Determine the size of the header and the data */ 746 fc = le16_to_cpu(desc->frame_ctl); 747 switch (fc & IEEE80211_FCTL_FTYPE) { 748 case IEEE80211_FTYPE_DATA: 749 if ((fc & IEEE80211_FCTL_TODS) 750 && (fc & IEEE80211_FCTL_FROMDS)) 751 hdrlen = 30; 752 else 753 hdrlen = 24; 754 datalen = len; 755 break; 756 case IEEE80211_FTYPE_MGMT: 757 hdrlen = 24; 758 datalen = len; 759 break; 760 case IEEE80211_FTYPE_CTL: 761 switch (fc & IEEE80211_FCTL_STYPE) { 762 case IEEE80211_STYPE_PSPOLL: 763 case IEEE80211_STYPE_RTS: 764 case IEEE80211_STYPE_CFEND: 765 case IEEE80211_STYPE_CFENDACK: 766 hdrlen = 16; 767 break; 768 case IEEE80211_STYPE_CTS: 769 case IEEE80211_STYPE_ACK: 770 hdrlen = 10; 771 break; 772 } 773 break; 774 default: 775 /* Unknown frame type */ 776 break; 777 } 778 779 /* sanity check the length */ 780 if (datalen > IEEE80211_MAX_DATA_LEN + 12) { 781 printk(KERN_DEBUG "%s: oversized monitor frame, " 782 "data length = %d\n", dev->name, datalen); 783 stats->rx_length_errors++; 784 goto update_stats; 785 } 786 787 skb = dev_alloc_skb(hdrlen + datalen); 788 if (!skb) { 789 printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n", 790 dev->name); 791 goto update_stats; 792 } 793 794 /* Copy the 802.11 header to the skb */ 795 skb_put_data(skb, &(desc->frame_ctl), hdrlen); 796 skb_reset_mac_header(skb); 797 798 /* If any, copy the data from the card to the skb */ 799 if (datalen > 0) { 800 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen), 801 ALIGN(datalen, 2), rxfid, 802 HERMES_802_2_OFFSET); 803 if (err) { 804 printk(KERN_ERR "%s: error %d reading monitor frame\n", 805 dev->name, err); 806 goto drop; 807 } 808 } 809 810 skb->dev = dev; 811 skb->ip_summed = CHECKSUM_NONE; 812 skb->pkt_type = PACKET_OTHERHOST; 813 skb->protocol = cpu_to_be16(ETH_P_802_2); 814 815 stats->rx_packets++; 816 stats->rx_bytes += skb->len; 817 818 netif_rx(skb); 819 return; 820 821 drop: 822 dev_kfree_skb_irq(skb); 823 update_stats: 824 stats->rx_errors++; 825 stats->rx_dropped++; 826 } 827 828 void __orinoco_ev_rx(struct net_device *dev, struct hermes *hw) 829 { 830 struct orinoco_private *priv = ndev_priv(dev); 831 struct net_device_stats *stats = &dev->stats; 832 struct iw_statistics *wstats = &priv->wstats; 833 struct sk_buff *skb = NULL; 834 u16 rxfid, status; 835 int length; 836 struct hermes_rx_descriptor *desc; 837 struct orinoco_rx_data *rx_data; 838 int err; 839 840 desc = kmalloc(sizeof(*desc), GFP_ATOMIC); 841 if (!desc) 842 goto update_stats; 843 844 rxfid = hermes_read_regn(hw, RXFID); 845 846 err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc), 847 rxfid, 0); 848 if (err) { 849 printk(KERN_ERR "%s: error %d reading Rx descriptor. " 850 "Frame dropped.\n", dev->name, err); 851 goto update_stats; 852 } 853 854 status = le16_to_cpu(desc->status); 855 856 if (status & HERMES_RXSTAT_BADCRC) { 857 DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n", 858 dev->name); 859 stats->rx_crc_errors++; 860 goto update_stats; 861 } 862 863 /* Handle frames in monitor mode */ 864 if (priv->iw_mode == NL80211_IFTYPE_MONITOR) { 865 orinoco_rx_monitor(dev, rxfid, desc); 866 goto out; 867 } 868 869 if (status & HERMES_RXSTAT_UNDECRYPTABLE) { 870 DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n", 871 dev->name); 872 wstats->discard.code++; 873 goto update_stats; 874 } 875 876 length = le16_to_cpu(desc->data_len); 877 878 /* Sanity checks */ 879 if (length < 3) { /* No for even an 802.2 LLC header */ 880 /* At least on Symbol firmware with PCF we get quite a 881 lot of these legitimately - Poll frames with no 882 data. */ 883 goto out; 884 } 885 if (length > IEEE80211_MAX_DATA_LEN) { 886 printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n", 887 dev->name, length); 888 stats->rx_length_errors++; 889 goto update_stats; 890 } 891 892 /* Payload size does not include Michael MIC. Increase payload 893 * size to read it together with the data. */ 894 if (status & HERMES_RXSTAT_MIC) 895 length += MICHAEL_MIC_LEN; 896 897 /* We need space for the packet data itself, plus an ethernet 898 header, plus 2 bytes so we can align the IP header on a 899 32bit boundary, plus 1 byte so we can read in odd length 900 packets from the card, which has an IO granularity of 16 901 bits */ 902 skb = dev_alloc_skb(length + ETH_HLEN + 2 + 1); 903 if (!skb) { 904 printk(KERN_WARNING "%s: Can't allocate skb for Rx\n", 905 dev->name); 906 goto update_stats; 907 } 908 909 /* We'll prepend the header, so reserve space for it. The worst 910 case is no decapsulation, when 802.3 header is prepended and 911 nothing is removed. 2 is for aligning the IP header. */ 912 skb_reserve(skb, ETH_HLEN + 2); 913 914 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length), 915 ALIGN(length, 2), rxfid, 916 HERMES_802_2_OFFSET); 917 if (err) { 918 printk(KERN_ERR "%s: error %d reading frame. " 919 "Frame dropped.\n", dev->name, err); 920 goto drop; 921 } 922 923 /* Add desc and skb to rx queue */ 924 rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC); 925 if (!rx_data) 926 goto drop; 927 928 rx_data->desc = desc; 929 rx_data->skb = skb; 930 list_add_tail(&rx_data->list, &priv->rx_list); 931 tasklet_schedule(&priv->rx_tasklet); 932 933 return; 934 935 drop: 936 dev_kfree_skb_irq(skb); 937 update_stats: 938 stats->rx_errors++; 939 stats->rx_dropped++; 940 out: 941 kfree(desc); 942 } 943 EXPORT_SYMBOL(__orinoco_ev_rx); 944 945 static void orinoco_rx(struct net_device *dev, 946 struct hermes_rx_descriptor *desc, 947 struct sk_buff *skb) 948 { 949 struct orinoco_private *priv = ndev_priv(dev); 950 struct net_device_stats *stats = &dev->stats; 951 u16 status, fc; 952 int length; 953 struct ethhdr *hdr; 954 955 status = le16_to_cpu(desc->status); 956 length = le16_to_cpu(desc->data_len); 957 fc = le16_to_cpu(desc->frame_ctl); 958 959 /* Calculate and check MIC */ 960 if (status & HERMES_RXSTAT_MIC) { 961 struct orinoco_tkip_key *key; 962 int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >> 963 HERMES_MIC_KEY_ID_SHIFT); 964 u8 mic[MICHAEL_MIC_LEN]; 965 u8 *rxmic; 966 u8 *src = (fc & IEEE80211_FCTL_FROMDS) ? 967 desc->addr3 : desc->addr2; 968 969 /* Extract Michael MIC from payload */ 970 rxmic = skb->data + skb->len - MICHAEL_MIC_LEN; 971 972 skb_trim(skb, skb->len - MICHAEL_MIC_LEN); 973 length -= MICHAEL_MIC_LEN; 974 975 key = (struct orinoco_tkip_key *) priv->keys[key_id].key; 976 977 if (!key) { 978 printk(KERN_WARNING "%s: Received encrypted frame from " 979 "%pM using key %i, but key is not installed\n", 980 dev->name, src, key_id); 981 goto drop; 982 } 983 984 orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src, 985 0, /* priority or QoS? */ 986 skb->data, skb->len, &mic[0]); 987 988 if (memcmp(mic, rxmic, 989 MICHAEL_MIC_LEN)) { 990 union iwreq_data wrqu; 991 struct iw_michaelmicfailure wxmic; 992 993 printk(KERN_WARNING "%s: " 994 "Invalid Michael MIC in data frame from %pM, " 995 "using key %i\n", 996 dev->name, src, key_id); 997 998 /* TODO: update stats */ 999 1000 /* Notify userspace */ 1001 memset(&wxmic, 0, sizeof(wxmic)); 1002 wxmic.flags = key_id & IW_MICFAILURE_KEY_ID; 1003 wxmic.flags |= (desc->addr1[0] & 1) ? 1004 IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE; 1005 wxmic.src_addr.sa_family = ARPHRD_ETHER; 1006 memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN); 1007 1008 (void) orinoco_hw_get_tkip_iv(priv, key_id, 1009 &wxmic.tsc[0]); 1010 1011 memset(&wrqu, 0, sizeof(wrqu)); 1012 wrqu.data.length = sizeof(wxmic); 1013 wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, 1014 (char *) &wxmic); 1015 1016 goto drop; 1017 } 1018 } 1019 1020 /* Handle decapsulation 1021 * In most cases, the firmware tell us about SNAP frames. 1022 * For some reason, the SNAP frames sent by LinkSys APs 1023 * are not properly recognised by most firmwares. 1024 * So, check ourselves */ 1025 if (length >= ENCAPS_OVERHEAD && 1026 (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) || 1027 ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) || 1028 is_ethersnap(skb->data))) { 1029 /* These indicate a SNAP within 802.2 LLC within 1030 802.11 frame which we'll need to de-encapsulate to 1031 the original EthernetII frame. */ 1032 hdr = skb_push(skb, ETH_HLEN - ENCAPS_OVERHEAD); 1033 } else { 1034 /* 802.3 frame - prepend 802.3 header as is */ 1035 hdr = skb_push(skb, ETH_HLEN); 1036 hdr->h_proto = htons(length); 1037 } 1038 memcpy(hdr->h_dest, desc->addr1, ETH_ALEN); 1039 if (fc & IEEE80211_FCTL_FROMDS) 1040 memcpy(hdr->h_source, desc->addr3, ETH_ALEN); 1041 else 1042 memcpy(hdr->h_source, desc->addr2, ETH_ALEN); 1043 1044 skb->protocol = eth_type_trans(skb, dev); 1045 skb->ip_summed = CHECKSUM_NONE; 1046 if (fc & IEEE80211_FCTL_TODS) 1047 skb->pkt_type = PACKET_OTHERHOST; 1048 1049 /* Process the wireless stats if needed */ 1050 orinoco_stat_gather(dev, skb, desc); 1051 1052 /* Pass the packet to the networking stack */ 1053 netif_rx(skb); 1054 stats->rx_packets++; 1055 stats->rx_bytes += length; 1056 1057 return; 1058 1059 drop: 1060 dev_kfree_skb(skb); 1061 stats->rx_errors++; 1062 stats->rx_dropped++; 1063 } 1064 1065 static void orinoco_rx_isr_tasklet(struct tasklet_struct *t) 1066 { 1067 struct orinoco_private *priv = from_tasklet(priv, t, rx_tasklet); 1068 struct net_device *dev = priv->ndev; 1069 struct orinoco_rx_data *rx_data, *temp; 1070 struct hermes_rx_descriptor *desc; 1071 struct sk_buff *skb; 1072 unsigned long flags; 1073 1074 /* orinoco_rx requires the driver lock, and we also need to 1075 * protect priv->rx_list, so just hold the lock over the 1076 * lot. 1077 * 1078 * If orinoco_lock fails, we've unplugged the card. In this 1079 * case just abort. */ 1080 if (orinoco_lock(priv, &flags) != 0) 1081 return; 1082 1083 /* extract desc and skb from queue */ 1084 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) { 1085 desc = rx_data->desc; 1086 skb = rx_data->skb; 1087 list_del(&rx_data->list); 1088 kfree(rx_data); 1089 1090 orinoco_rx(dev, desc, skb); 1091 1092 kfree(desc); 1093 } 1094 1095 orinoco_unlock(priv, &flags); 1096 } 1097 1098 /********************************************************************/ 1099 /* Rx path (info frames) */ 1100 /********************************************************************/ 1101 1102 static void print_linkstatus(struct net_device *dev, u16 status) 1103 { 1104 char *s; 1105 1106 if (suppress_linkstatus) 1107 return; 1108 1109 switch (status) { 1110 case HERMES_LINKSTATUS_NOT_CONNECTED: 1111 s = "Not Connected"; 1112 break; 1113 case HERMES_LINKSTATUS_CONNECTED: 1114 s = "Connected"; 1115 break; 1116 case HERMES_LINKSTATUS_DISCONNECTED: 1117 s = "Disconnected"; 1118 break; 1119 case HERMES_LINKSTATUS_AP_CHANGE: 1120 s = "AP Changed"; 1121 break; 1122 case HERMES_LINKSTATUS_AP_OUT_OF_RANGE: 1123 s = "AP Out of Range"; 1124 break; 1125 case HERMES_LINKSTATUS_AP_IN_RANGE: 1126 s = "AP In Range"; 1127 break; 1128 case HERMES_LINKSTATUS_ASSOC_FAILED: 1129 s = "Association Failed"; 1130 break; 1131 default: 1132 s = "UNKNOWN"; 1133 } 1134 1135 printk(KERN_DEBUG "%s: New link status: %s (%04x)\n", 1136 dev->name, s, status); 1137 } 1138 1139 /* Search scan results for requested BSSID, join it if found */ 1140 static void orinoco_join_ap(struct work_struct *work) 1141 { 1142 struct orinoco_private *priv = 1143 container_of(work, struct orinoco_private, join_work); 1144 struct net_device *dev = priv->ndev; 1145 struct hermes *hw = &priv->hw; 1146 int err; 1147 unsigned long flags; 1148 struct join_req { 1149 u8 bssid[ETH_ALEN]; 1150 __le16 channel; 1151 } __packed req; 1152 const int atom_len = offsetof(struct prism2_scan_apinfo, atim); 1153 struct prism2_scan_apinfo *atom = NULL; 1154 int offset = 4; 1155 int found = 0; 1156 u8 *buf; 1157 u16 len; 1158 1159 /* Allocate buffer for scan results */ 1160 buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL); 1161 if (!buf) 1162 return; 1163 1164 if (orinoco_lock(priv, &flags) != 0) 1165 goto fail_lock; 1166 1167 /* Sanity checks in case user changed something in the meantime */ 1168 if (!priv->bssid_fixed) 1169 goto out; 1170 1171 if (strlen(priv->desired_essid) == 0) 1172 goto out; 1173 1174 /* Read scan results from the firmware */ 1175 err = hw->ops->read_ltv(hw, USER_BAP, 1176 HERMES_RID_SCANRESULTSTABLE, 1177 MAX_SCAN_LEN, &len, buf); 1178 if (err) { 1179 printk(KERN_ERR "%s: Cannot read scan results\n", 1180 dev->name); 1181 goto out; 1182 } 1183 1184 len = HERMES_RECLEN_TO_BYTES(len); 1185 1186 /* Go through the scan results looking for the channel of the AP 1187 * we were requested to join */ 1188 for (; offset + atom_len <= len; offset += atom_len) { 1189 atom = (struct prism2_scan_apinfo *) (buf + offset); 1190 if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) { 1191 found = 1; 1192 break; 1193 } 1194 } 1195 1196 if (!found) { 1197 DEBUG(1, "%s: Requested AP not found in scan results\n", 1198 dev->name); 1199 goto out; 1200 } 1201 1202 memcpy(req.bssid, priv->desired_bssid, ETH_ALEN); 1203 req.channel = atom->channel; /* both are little-endian */ 1204 err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST, 1205 &req); 1206 if (err) 1207 printk(KERN_ERR "%s: Error issuing join request\n", dev->name); 1208 1209 out: 1210 orinoco_unlock(priv, &flags); 1211 1212 fail_lock: 1213 kfree(buf); 1214 } 1215 1216 /* Send new BSSID to userspace */ 1217 static void orinoco_send_bssid_wevent(struct orinoco_private *priv) 1218 { 1219 struct net_device *dev = priv->ndev; 1220 struct hermes *hw = &priv->hw; 1221 union iwreq_data wrqu; 1222 int err; 1223 1224 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID, 1225 ETH_ALEN, NULL, wrqu.ap_addr.sa_data); 1226 if (err != 0) 1227 return; 1228 1229 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1230 1231 /* Send event to user space */ 1232 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1233 } 1234 1235 static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv) 1236 { 1237 struct net_device *dev = priv->ndev; 1238 struct hermes *hw = &priv->hw; 1239 union iwreq_data wrqu; 1240 int err; 1241 u8 buf[88]; 1242 u8 *ie; 1243 1244 if (!priv->has_wpa) 1245 return; 1246 1247 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO, 1248 sizeof(buf), NULL, &buf); 1249 if (err != 0) 1250 return; 1251 1252 ie = orinoco_get_wpa_ie(buf, sizeof(buf)); 1253 if (ie) { 1254 int rem = sizeof(buf) - (ie - &buf[0]); 1255 wrqu.data.length = ie[1] + 2; 1256 if (wrqu.data.length > rem) 1257 wrqu.data.length = rem; 1258 1259 if (wrqu.data.length) 1260 /* Send event to user space */ 1261 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie); 1262 } 1263 } 1264 1265 static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv) 1266 { 1267 struct net_device *dev = priv->ndev; 1268 struct hermes *hw = &priv->hw; 1269 union iwreq_data wrqu; 1270 int err; 1271 u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */ 1272 u8 *ie; 1273 1274 if (!priv->has_wpa) 1275 return; 1276 1277 err = hw->ops->read_ltv(hw, USER_BAP, 1278 HERMES_RID_CURRENT_ASSOC_RESP_INFO, 1279 sizeof(buf), NULL, &buf); 1280 if (err != 0) 1281 return; 1282 1283 ie = orinoco_get_wpa_ie(buf, sizeof(buf)); 1284 if (ie) { 1285 int rem = sizeof(buf) - (ie - &buf[0]); 1286 wrqu.data.length = ie[1] + 2; 1287 if (wrqu.data.length > rem) 1288 wrqu.data.length = rem; 1289 1290 if (wrqu.data.length) 1291 /* Send event to user space */ 1292 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie); 1293 } 1294 } 1295 1296 static void orinoco_send_wevents(struct work_struct *work) 1297 { 1298 struct orinoco_private *priv = 1299 container_of(work, struct orinoco_private, wevent_work); 1300 unsigned long flags; 1301 1302 if (orinoco_lock(priv, &flags) != 0) 1303 return; 1304 1305 orinoco_send_assocreqie_wevent(priv); 1306 orinoco_send_assocrespie_wevent(priv); 1307 orinoco_send_bssid_wevent(priv); 1308 1309 orinoco_unlock(priv, &flags); 1310 } 1311 1312 static void qbuf_scan(struct orinoco_private *priv, void *buf, 1313 int len, int type) 1314 { 1315 struct orinoco_scan_data *sd; 1316 unsigned long flags; 1317 1318 sd = kmalloc(sizeof(*sd), GFP_ATOMIC); 1319 if (!sd) 1320 return; 1321 1322 sd->buf = buf; 1323 sd->len = len; 1324 sd->type = type; 1325 1326 spin_lock_irqsave(&priv->scan_lock, flags); 1327 list_add_tail(&sd->list, &priv->scan_list); 1328 spin_unlock_irqrestore(&priv->scan_lock, flags); 1329 1330 schedule_work(&priv->process_scan); 1331 } 1332 1333 static void qabort_scan(struct orinoco_private *priv) 1334 { 1335 struct orinoco_scan_data *sd; 1336 unsigned long flags; 1337 1338 sd = kmalloc(sizeof(*sd), GFP_ATOMIC); 1339 if (!sd) 1340 return; 1341 1342 sd->len = -1; /* Abort */ 1343 1344 spin_lock_irqsave(&priv->scan_lock, flags); 1345 list_add_tail(&sd->list, &priv->scan_list); 1346 spin_unlock_irqrestore(&priv->scan_lock, flags); 1347 1348 schedule_work(&priv->process_scan); 1349 } 1350 1351 static void orinoco_process_scan_results(struct work_struct *work) 1352 { 1353 struct orinoco_private *priv = 1354 container_of(work, struct orinoco_private, process_scan); 1355 struct orinoco_scan_data *sd, *temp; 1356 unsigned long flags; 1357 void *buf; 1358 int len; 1359 int type; 1360 1361 spin_lock_irqsave(&priv->scan_lock, flags); 1362 list_for_each_entry_safe(sd, temp, &priv->scan_list, list) { 1363 1364 buf = sd->buf; 1365 len = sd->len; 1366 type = sd->type; 1367 1368 list_del(&sd->list); 1369 spin_unlock_irqrestore(&priv->scan_lock, flags); 1370 kfree(sd); 1371 1372 if (len > 0) { 1373 if (type == HERMES_INQ_CHANNELINFO) 1374 orinoco_add_extscan_result(priv, buf, len); 1375 else 1376 orinoco_add_hostscan_results(priv, buf, len); 1377 1378 kfree(buf); 1379 } else { 1380 /* Either abort or complete the scan */ 1381 orinoco_scan_done(priv, (len < 0)); 1382 } 1383 1384 spin_lock_irqsave(&priv->scan_lock, flags); 1385 } 1386 spin_unlock_irqrestore(&priv->scan_lock, flags); 1387 } 1388 1389 void __orinoco_ev_info(struct net_device *dev, struct hermes *hw) 1390 { 1391 struct orinoco_private *priv = ndev_priv(dev); 1392 u16 infofid; 1393 struct { 1394 __le16 len; 1395 __le16 type; 1396 } __packed info; 1397 int len, type; 1398 int err; 1399 1400 /* This is an answer to an INQUIRE command that we did earlier, 1401 * or an information "event" generated by the card 1402 * The controller return to us a pseudo frame containing 1403 * the information in question - Jean II */ 1404 infofid = hermes_read_regn(hw, INFOFID); 1405 1406 /* Read the info frame header - don't try too hard */ 1407 err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info), 1408 infofid, 0); 1409 if (err) { 1410 printk(KERN_ERR "%s: error %d reading info frame. " 1411 "Frame dropped.\n", dev->name, err); 1412 return; 1413 } 1414 1415 len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len)); 1416 type = le16_to_cpu(info.type); 1417 1418 switch (type) { 1419 case HERMES_INQ_TALLIES: { 1420 struct hermes_tallies_frame tallies; 1421 struct iw_statistics *wstats = &priv->wstats; 1422 1423 if (len > sizeof(tallies)) { 1424 printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n", 1425 dev->name, len); 1426 len = sizeof(tallies); 1427 } 1428 1429 err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len, 1430 infofid, sizeof(info)); 1431 if (err) 1432 break; 1433 1434 /* Increment our various counters */ 1435 /* wstats->discard.nwid - no wrong BSSID stuff */ 1436 wstats->discard.code += 1437 le16_to_cpu(tallies.RxWEPUndecryptable); 1438 if (len == sizeof(tallies)) 1439 wstats->discard.code += 1440 le16_to_cpu(tallies.RxDiscards_WEPICVError) + 1441 le16_to_cpu(tallies.RxDiscards_WEPExcluded); 1442 wstats->discard.misc += 1443 le16_to_cpu(tallies.TxDiscardsWrongSA); 1444 wstats->discard.fragment += 1445 le16_to_cpu(tallies.RxMsgInBadMsgFragments); 1446 wstats->discard.retries += 1447 le16_to_cpu(tallies.TxRetryLimitExceeded); 1448 /* wstats->miss.beacon - no match */ 1449 } 1450 break; 1451 case HERMES_INQ_LINKSTATUS: { 1452 struct hermes_linkstatus linkstatus; 1453 u16 newstatus; 1454 int connected; 1455 1456 if (priv->iw_mode == NL80211_IFTYPE_MONITOR) 1457 break; 1458 1459 if (len != sizeof(linkstatus)) { 1460 printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n", 1461 dev->name, len); 1462 break; 1463 } 1464 1465 err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len, 1466 infofid, sizeof(info)); 1467 if (err) 1468 break; 1469 newstatus = le16_to_cpu(linkstatus.linkstatus); 1470 1471 /* Symbol firmware uses "out of range" to signal that 1472 * the hostscan frame can be requested. */ 1473 if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE && 1474 priv->firmware_type == FIRMWARE_TYPE_SYMBOL && 1475 priv->has_hostscan && priv->scan_request) { 1476 hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL); 1477 break; 1478 } 1479 1480 connected = (newstatus == HERMES_LINKSTATUS_CONNECTED) 1481 || (newstatus == HERMES_LINKSTATUS_AP_CHANGE) 1482 || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE); 1483 1484 if (connected) 1485 netif_carrier_on(dev); 1486 else if (!ignore_disconnect) 1487 netif_carrier_off(dev); 1488 1489 if (newstatus != priv->last_linkstatus) { 1490 priv->last_linkstatus = newstatus; 1491 print_linkstatus(dev, newstatus); 1492 /* The info frame contains only one word which is the 1493 * status (see hermes.h). The status is pretty boring 1494 * in itself, that's why we export the new BSSID... 1495 * Jean II */ 1496 schedule_work(&priv->wevent_work); 1497 } 1498 } 1499 break; 1500 case HERMES_INQ_SCAN: 1501 if (!priv->scan_request && priv->bssid_fixed && 1502 priv->firmware_type == FIRMWARE_TYPE_INTERSIL) { 1503 schedule_work(&priv->join_work); 1504 break; 1505 } 1506 fallthrough; 1507 case HERMES_INQ_HOSTSCAN: 1508 case HERMES_INQ_HOSTSCAN_SYMBOL: { 1509 /* Result of a scanning. Contains information about 1510 * cells in the vicinity - Jean II */ 1511 unsigned char *buf; 1512 1513 /* Sanity check */ 1514 if (len > 4096) { 1515 printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n", 1516 dev->name, len); 1517 qabort_scan(priv); 1518 break; 1519 } 1520 1521 /* Allocate buffer for results */ 1522 buf = kmalloc(len, GFP_ATOMIC); 1523 if (buf == NULL) { 1524 /* No memory, so can't printk()... */ 1525 qabort_scan(priv); 1526 break; 1527 } 1528 1529 /* Read scan data */ 1530 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len, 1531 infofid, sizeof(info)); 1532 if (err) { 1533 kfree(buf); 1534 qabort_scan(priv); 1535 break; 1536 } 1537 1538 #ifdef ORINOCO_DEBUG 1539 { 1540 int i; 1541 printk(KERN_DEBUG "Scan result [%02X", buf[0]); 1542 for (i = 1; i < (len * 2); i++) 1543 printk(":%02X", buf[i]); 1544 printk("]\n"); 1545 } 1546 #endif /* ORINOCO_DEBUG */ 1547 1548 qbuf_scan(priv, buf, len, type); 1549 } 1550 break; 1551 case HERMES_INQ_CHANNELINFO: 1552 { 1553 struct agere_ext_scan_info *bss; 1554 1555 if (!priv->scan_request) { 1556 printk(KERN_DEBUG "%s: Got chaninfo without scan, " 1557 "len=%d\n", dev->name, len); 1558 break; 1559 } 1560 1561 /* An empty result indicates that the scan is complete */ 1562 if (len == 0) { 1563 qbuf_scan(priv, NULL, len, type); 1564 break; 1565 } 1566 1567 /* Sanity check */ 1568 else if (len < (offsetof(struct agere_ext_scan_info, 1569 data) + 2)) { 1570 /* Drop this result now so we don't have to 1571 * keep checking later */ 1572 printk(KERN_WARNING 1573 "%s: Ext scan results too short (%d bytes)\n", 1574 dev->name, len); 1575 break; 1576 } 1577 1578 bss = kmalloc(len, GFP_ATOMIC); 1579 if (bss == NULL) 1580 break; 1581 1582 /* Read scan data */ 1583 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len, 1584 infofid, sizeof(info)); 1585 if (err) 1586 kfree(bss); 1587 else 1588 qbuf_scan(priv, bss, len, type); 1589 1590 break; 1591 } 1592 case HERMES_INQ_SEC_STAT_AGERE: 1593 /* Security status (Agere specific) */ 1594 /* Ignore this frame for now */ 1595 if (priv->firmware_type == FIRMWARE_TYPE_AGERE) 1596 break; 1597 fallthrough; 1598 default: 1599 printk(KERN_DEBUG "%s: Unknown information frame received: " 1600 "type 0x%04x, length %d\n", dev->name, type, len); 1601 /* We don't actually do anything about it */ 1602 break; 1603 } 1604 } 1605 EXPORT_SYMBOL(__orinoco_ev_info); 1606 1607 static void __orinoco_ev_infdrop(struct net_device *dev, struct hermes *hw) 1608 { 1609 if (net_ratelimit()) 1610 printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name); 1611 } 1612 1613 /********************************************************************/ 1614 /* Internal hardware control routines */ 1615 /********************************************************************/ 1616 1617 static int __orinoco_up(struct orinoco_private *priv) 1618 { 1619 struct net_device *dev = priv->ndev; 1620 struct hermes *hw = &priv->hw; 1621 int err; 1622 1623 netif_carrier_off(dev); /* just to make sure */ 1624 1625 err = __orinoco_commit(priv); 1626 if (err) { 1627 printk(KERN_ERR "%s: Error %d configuring card\n", 1628 dev->name, err); 1629 return err; 1630 } 1631 1632 /* Fire things up again */ 1633 hermes_set_irqmask(hw, ORINOCO_INTEN); 1634 err = hermes_enable_port(hw, 0); 1635 if (err) { 1636 printk(KERN_ERR "%s: Error %d enabling MAC port\n", 1637 dev->name, err); 1638 return err; 1639 } 1640 1641 netif_start_queue(dev); 1642 1643 return 0; 1644 } 1645 1646 static int __orinoco_down(struct orinoco_private *priv) 1647 { 1648 struct net_device *dev = priv->ndev; 1649 struct hermes *hw = &priv->hw; 1650 int err; 1651 1652 netif_stop_queue(dev); 1653 1654 if (!priv->hw_unavailable) { 1655 if (!priv->broken_disableport) { 1656 err = hermes_disable_port(hw, 0); 1657 if (err) { 1658 /* Some firmwares (e.g. Intersil 1.3.x) seem 1659 * to have problems disabling the port, oh 1660 * well, too bad. */ 1661 printk(KERN_WARNING "%s: Error %d disabling MAC port\n", 1662 dev->name, err); 1663 priv->broken_disableport = 1; 1664 } 1665 } 1666 hermes_set_irqmask(hw, 0); 1667 hermes_write_regn(hw, EVACK, 0xffff); 1668 } 1669 1670 orinoco_scan_done(priv, true); 1671 1672 /* firmware will have to reassociate */ 1673 netif_carrier_off(dev); 1674 priv->last_linkstatus = 0xffff; 1675 1676 return 0; 1677 } 1678 1679 static int orinoco_reinit_firmware(struct orinoco_private *priv) 1680 { 1681 struct hermes *hw = &priv->hw; 1682 int err; 1683 1684 err = hw->ops->init(hw); 1685 if (priv->do_fw_download && !err) { 1686 err = orinoco_download(priv); 1687 if (err) 1688 priv->do_fw_download = 0; 1689 } 1690 if (!err) 1691 err = orinoco_hw_allocate_fid(priv); 1692 1693 return err; 1694 } 1695 1696 static int 1697 __orinoco_set_multicast_list(struct net_device *dev) 1698 { 1699 struct orinoco_private *priv = ndev_priv(dev); 1700 int err = 0; 1701 int promisc, mc_count; 1702 1703 /* The Hermes doesn't seem to have an allmulti mode, so we go 1704 * into promiscuous mode and let the upper levels deal. */ 1705 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || 1706 (netdev_mc_count(dev) > MAX_MULTICAST(priv))) { 1707 promisc = 1; 1708 mc_count = 0; 1709 } else { 1710 promisc = 0; 1711 mc_count = netdev_mc_count(dev); 1712 } 1713 1714 err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc); 1715 1716 return err; 1717 } 1718 1719 /* This must be called from user context, without locks held - use 1720 * schedule_work() */ 1721 void orinoco_reset(struct work_struct *work) 1722 { 1723 struct orinoco_private *priv = 1724 container_of(work, struct orinoco_private, reset_work); 1725 struct net_device *dev = priv->ndev; 1726 struct hermes *hw = &priv->hw; 1727 int err; 1728 unsigned long flags; 1729 1730 if (orinoco_lock(priv, &flags) != 0) 1731 /* When the hardware becomes available again, whatever 1732 * detects that is responsible for re-initializing 1733 * it. So no need for anything further */ 1734 return; 1735 1736 netif_stop_queue(dev); 1737 1738 /* Shut off interrupts. Depending on what state the hardware 1739 * is in, this might not work, but we'll try anyway */ 1740 hermes_set_irqmask(hw, 0); 1741 hermes_write_regn(hw, EVACK, 0xffff); 1742 1743 priv->hw_unavailable++; 1744 priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */ 1745 netif_carrier_off(dev); 1746 1747 orinoco_unlock(priv, &flags); 1748 1749 /* Scanning support: Notify scan cancellation */ 1750 orinoco_scan_done(priv, true); 1751 1752 if (priv->hard_reset) { 1753 err = (*priv->hard_reset)(priv); 1754 if (err) { 1755 printk(KERN_ERR "%s: orinoco_reset: Error %d " 1756 "performing hard reset\n", dev->name, err); 1757 goto disable; 1758 } 1759 } 1760 1761 err = orinoco_reinit_firmware(priv); 1762 if (err) { 1763 printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n", 1764 dev->name, err); 1765 goto disable; 1766 } 1767 1768 /* This has to be called from user context */ 1769 orinoco_lock_irq(priv); 1770 1771 priv->hw_unavailable--; 1772 1773 /* priv->open or priv->hw_unavailable might have changed while 1774 * we dropped the lock */ 1775 if (priv->open && (!priv->hw_unavailable)) { 1776 err = __orinoco_up(priv); 1777 if (err) { 1778 printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n", 1779 dev->name, err); 1780 } else 1781 netif_trans_update(dev); 1782 } 1783 1784 orinoco_unlock_irq(priv); 1785 1786 return; 1787 disable: 1788 hermes_set_irqmask(hw, 0); 1789 netif_device_detach(dev); 1790 printk(KERN_ERR "%s: Device has been disabled!\n", dev->name); 1791 } 1792 1793 static int __orinoco_commit(struct orinoco_private *priv) 1794 { 1795 struct net_device *dev = priv->ndev; 1796 int err = 0; 1797 1798 /* If we've called commit, we are reconfiguring or bringing the 1799 * interface up. Maintaining countermeasures across this would 1800 * be confusing, so note that we've disabled them. The port will 1801 * be enabled later in orinoco_commit or __orinoco_up. */ 1802 priv->tkip_cm_active = 0; 1803 1804 err = orinoco_hw_program_rids(priv); 1805 1806 /* FIXME: what about netif_tx_lock */ 1807 (void) __orinoco_set_multicast_list(dev); 1808 1809 return err; 1810 } 1811 1812 /* Ensures configuration changes are applied. May result in a reset. 1813 * The caller should hold priv->lock 1814 */ 1815 int orinoco_commit(struct orinoco_private *priv) 1816 { 1817 struct net_device *dev = priv->ndev; 1818 struct hermes *hw = &priv->hw; 1819 int err; 1820 1821 if (priv->broken_disableport) { 1822 schedule_work(&priv->reset_work); 1823 return 0; 1824 } 1825 1826 err = hermes_disable_port(hw, 0); 1827 if (err) { 1828 printk(KERN_WARNING "%s: Unable to disable port " 1829 "while reconfiguring card\n", dev->name); 1830 priv->broken_disableport = 1; 1831 goto out; 1832 } 1833 1834 err = __orinoco_commit(priv); 1835 if (err) { 1836 printk(KERN_WARNING "%s: Unable to reconfigure card\n", 1837 dev->name); 1838 goto out; 1839 } 1840 1841 err = hermes_enable_port(hw, 0); 1842 if (err) { 1843 printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n", 1844 dev->name); 1845 goto out; 1846 } 1847 1848 out: 1849 if (err) { 1850 printk(KERN_WARNING "%s: Resetting instead...\n", dev->name); 1851 schedule_work(&priv->reset_work); 1852 err = 0; 1853 } 1854 return err; 1855 } 1856 1857 /********************************************************************/ 1858 /* Interrupt handler */ 1859 /********************************************************************/ 1860 1861 static void __orinoco_ev_tick(struct net_device *dev, struct hermes *hw) 1862 { 1863 printk(KERN_DEBUG "%s: TICK\n", dev->name); 1864 } 1865 1866 static void __orinoco_ev_wterr(struct net_device *dev, struct hermes *hw) 1867 { 1868 /* This seems to happen a fair bit under load, but ignoring it 1869 seems to work fine...*/ 1870 printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n", 1871 dev->name); 1872 } 1873 1874 irqreturn_t orinoco_interrupt(int irq, void *dev_id) 1875 { 1876 struct orinoco_private *priv = dev_id; 1877 struct net_device *dev = priv->ndev; 1878 struct hermes *hw = &priv->hw; 1879 int count = MAX_IRQLOOPS_PER_IRQ; 1880 u16 evstat, events; 1881 /* These are used to detect a runaway interrupt situation. 1882 * 1883 * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy, 1884 * we panic and shut down the hardware 1885 */ 1886 /* jiffies value the last time we were called */ 1887 static int last_irq_jiffy; /* = 0 */ 1888 static int loops_this_jiffy; /* = 0 */ 1889 unsigned long flags; 1890 1891 if (orinoco_lock(priv, &flags) != 0) { 1892 /* If hw is unavailable - we don't know if the irq was 1893 * for us or not */ 1894 return IRQ_HANDLED; 1895 } 1896 1897 evstat = hermes_read_regn(hw, EVSTAT); 1898 events = evstat & hw->inten; 1899 if (!events) { 1900 orinoco_unlock(priv, &flags); 1901 return IRQ_NONE; 1902 } 1903 1904 if (jiffies != last_irq_jiffy) 1905 loops_this_jiffy = 0; 1906 last_irq_jiffy = jiffies; 1907 1908 while (events && count--) { 1909 if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) { 1910 printk(KERN_WARNING "%s: IRQ handler is looping too " 1911 "much! Resetting.\n", dev->name); 1912 /* Disable interrupts for now */ 1913 hermes_set_irqmask(hw, 0); 1914 schedule_work(&priv->reset_work); 1915 break; 1916 } 1917 1918 /* Check the card hasn't been removed */ 1919 if (!hermes_present(hw)) { 1920 DEBUG(0, "orinoco_interrupt(): card removed\n"); 1921 break; 1922 } 1923 1924 if (events & HERMES_EV_TICK) 1925 __orinoco_ev_tick(dev, hw); 1926 if (events & HERMES_EV_WTERR) 1927 __orinoco_ev_wterr(dev, hw); 1928 if (events & HERMES_EV_INFDROP) 1929 __orinoco_ev_infdrop(dev, hw); 1930 if (events & HERMES_EV_INFO) 1931 __orinoco_ev_info(dev, hw); 1932 if (events & HERMES_EV_RX) 1933 __orinoco_ev_rx(dev, hw); 1934 if (events & HERMES_EV_TXEXC) 1935 __orinoco_ev_txexc(dev, hw); 1936 if (events & HERMES_EV_TX) 1937 __orinoco_ev_tx(dev, hw); 1938 if (events & HERMES_EV_ALLOC) 1939 __orinoco_ev_alloc(dev, hw); 1940 1941 hermes_write_regn(hw, EVACK, evstat); 1942 1943 evstat = hermes_read_regn(hw, EVSTAT); 1944 events = evstat & hw->inten; 1945 } 1946 1947 orinoco_unlock(priv, &flags); 1948 return IRQ_HANDLED; 1949 } 1950 EXPORT_SYMBOL(orinoco_interrupt); 1951 1952 /********************************************************************/ 1953 /* Power management */ 1954 /********************************************************************/ 1955 #if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT) 1956 static int orinoco_pm_notifier(struct notifier_block *notifier, 1957 unsigned long pm_event, 1958 void *unused) 1959 { 1960 struct orinoco_private *priv = container_of(notifier, 1961 struct orinoco_private, 1962 pm_notifier); 1963 1964 /* All we need to do is cache the firmware before suspend, and 1965 * release it when we come out. 1966 * 1967 * Only need to do this if we're downloading firmware. */ 1968 if (!priv->do_fw_download) 1969 return NOTIFY_DONE; 1970 1971 switch (pm_event) { 1972 case PM_HIBERNATION_PREPARE: 1973 case PM_SUSPEND_PREPARE: 1974 orinoco_cache_fw(priv, 0); 1975 break; 1976 1977 case PM_POST_RESTORE: 1978 /* Restore from hibernation failed. We need to clean 1979 * up in exactly the same way, so fall through. */ 1980 case PM_POST_HIBERNATION: 1981 case PM_POST_SUSPEND: 1982 orinoco_uncache_fw(priv); 1983 break; 1984 1985 case PM_RESTORE_PREPARE: 1986 default: 1987 break; 1988 } 1989 1990 return NOTIFY_DONE; 1991 } 1992 1993 static void orinoco_register_pm_notifier(struct orinoco_private *priv) 1994 { 1995 priv->pm_notifier.notifier_call = orinoco_pm_notifier; 1996 register_pm_notifier(&priv->pm_notifier); 1997 } 1998 1999 static void orinoco_unregister_pm_notifier(struct orinoco_private *priv) 2000 { 2001 unregister_pm_notifier(&priv->pm_notifier); 2002 } 2003 #else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */ 2004 #define orinoco_register_pm_notifier(priv) do { } while (0) 2005 #define orinoco_unregister_pm_notifier(priv) do { } while (0) 2006 #endif 2007 2008 /********************************************************************/ 2009 /* Initialization */ 2010 /********************************************************************/ 2011 2012 int orinoco_init(struct orinoco_private *priv) 2013 { 2014 struct device *dev = priv->dev; 2015 struct wiphy *wiphy = priv_to_wiphy(priv); 2016 struct hermes *hw = &priv->hw; 2017 int err = 0; 2018 2019 /* No need to lock, the hw_unavailable flag is already set in 2020 * alloc_orinocodev() */ 2021 priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN; 2022 2023 /* Initialize the firmware */ 2024 err = hw->ops->init(hw); 2025 if (err != 0) { 2026 dev_err(dev, "Failed to initialize firmware (err = %d)\n", 2027 err); 2028 goto out; 2029 } 2030 2031 err = determine_fw_capabilities(priv, wiphy->fw_version, 2032 sizeof(wiphy->fw_version), 2033 &wiphy->hw_version); 2034 if (err != 0) { 2035 dev_err(dev, "Incompatible firmware, aborting\n"); 2036 goto out; 2037 } 2038 2039 if (priv->do_fw_download) { 2040 #ifdef CONFIG_HERMES_CACHE_FW_ON_INIT 2041 orinoco_cache_fw(priv, 0); 2042 #endif 2043 2044 err = orinoco_download(priv); 2045 if (err) 2046 priv->do_fw_download = 0; 2047 2048 /* Check firmware version again */ 2049 err = determine_fw_capabilities(priv, wiphy->fw_version, 2050 sizeof(wiphy->fw_version), 2051 &wiphy->hw_version); 2052 if (err != 0) { 2053 dev_err(dev, "Incompatible firmware, aborting\n"); 2054 goto out; 2055 } 2056 } 2057 2058 if (priv->has_port3) 2059 dev_info(dev, "Ad-hoc demo mode supported\n"); 2060 if (priv->has_ibss) 2061 dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n"); 2062 if (priv->has_wep) 2063 dev_info(dev, "WEP supported, %s-bit key\n", 2064 priv->has_big_wep ? "104" : "40"); 2065 if (priv->has_wpa) { 2066 dev_info(dev, "WPA-PSK supported\n"); 2067 if (orinoco_mic_init(priv)) { 2068 dev_err(dev, "Failed to setup MIC crypto algorithm. " 2069 "Disabling WPA support\n"); 2070 priv->has_wpa = 0; 2071 } 2072 } 2073 2074 err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr); 2075 if (err) 2076 goto out; 2077 2078 err = orinoco_hw_allocate_fid(priv); 2079 if (err) { 2080 dev_err(dev, "Failed to allocate NIC buffer!\n"); 2081 goto out; 2082 } 2083 2084 /* Set up the default configuration */ 2085 priv->iw_mode = NL80211_IFTYPE_STATION; 2086 /* By default use IEEE/IBSS ad-hoc mode if we have it */ 2087 priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss); 2088 set_port_type(priv); 2089 priv->channel = 0; /* use firmware default */ 2090 2091 priv->promiscuous = 0; 2092 priv->encode_alg = ORINOCO_ALG_NONE; 2093 priv->tx_key = 0; 2094 priv->wpa_enabled = 0; 2095 priv->tkip_cm_active = 0; 2096 priv->key_mgmt = 0; 2097 priv->wpa_ie_len = 0; 2098 priv->wpa_ie = NULL; 2099 2100 if (orinoco_wiphy_register(wiphy)) { 2101 err = -ENODEV; 2102 goto out; 2103 } 2104 2105 /* Make the hardware available, as long as it hasn't been 2106 * removed elsewhere (e.g. by PCMCIA hot unplug) */ 2107 orinoco_lock_irq(priv); 2108 priv->hw_unavailable--; 2109 orinoco_unlock_irq(priv); 2110 2111 dev_dbg(dev, "Ready\n"); 2112 2113 out: 2114 return err; 2115 } 2116 EXPORT_SYMBOL(orinoco_init); 2117 2118 static const struct net_device_ops orinoco_netdev_ops = { 2119 .ndo_open = orinoco_open, 2120 .ndo_stop = orinoco_stop, 2121 .ndo_start_xmit = orinoco_xmit, 2122 .ndo_set_rx_mode = orinoco_set_multicast_list, 2123 .ndo_change_mtu = orinoco_change_mtu, 2124 .ndo_set_mac_address = eth_mac_addr, 2125 .ndo_validate_addr = eth_validate_addr, 2126 .ndo_tx_timeout = orinoco_tx_timeout, 2127 }; 2128 2129 /* Allocate private data. 2130 * 2131 * This driver has a number of structures associated with it 2132 * netdev - Net device structure for each network interface 2133 * wiphy - structure associated with wireless phy 2134 * wireless_dev (wdev) - structure for each wireless interface 2135 * hw - structure for hermes chip info 2136 * card - card specific structure for use by the card driver 2137 * (airport, orinoco_cs) 2138 * priv - orinoco private data 2139 * device - generic linux device structure 2140 * 2141 * +---------+ +---------+ 2142 * | wiphy | | netdev | 2143 * | +-------+ | +-------+ 2144 * | | priv | | | wdev | 2145 * | | +-----+ +-+-------+ 2146 * | | | hw | 2147 * | +-+-----+ 2148 * | | card | 2149 * +-+-------+ 2150 * 2151 * priv has a link to netdev and device 2152 * wdev has a link to wiphy 2153 */ 2154 struct orinoco_private 2155 *alloc_orinocodev(int sizeof_card, 2156 struct device *device, 2157 int (*hard_reset)(struct orinoco_private *), 2158 int (*stop_fw)(struct orinoco_private *, int)) 2159 { 2160 struct orinoco_private *priv; 2161 struct wiphy *wiphy; 2162 2163 /* allocate wiphy 2164 * NOTE: We only support a single virtual interface 2165 * but this may change when monitor mode is added 2166 */ 2167 wiphy = wiphy_new(&orinoco_cfg_ops, 2168 sizeof(struct orinoco_private) + sizeof_card); 2169 if (!wiphy) 2170 return NULL; 2171 2172 priv = wiphy_priv(wiphy); 2173 priv->dev = device; 2174 2175 if (sizeof_card) 2176 priv->card = (void *)((unsigned long)priv 2177 + sizeof(struct orinoco_private)); 2178 else 2179 priv->card = NULL; 2180 2181 orinoco_wiphy_init(wiphy); 2182 2183 #ifdef WIRELESS_SPY 2184 priv->wireless_data.spy_data = &priv->spy_data; 2185 #endif 2186 2187 /* Set up default callbacks */ 2188 priv->hard_reset = hard_reset; 2189 priv->stop_fw = stop_fw; 2190 2191 spin_lock_init(&priv->lock); 2192 priv->open = 0; 2193 priv->hw_unavailable = 1; /* orinoco_init() must clear this 2194 * before anything else touches the 2195 * hardware */ 2196 INIT_WORK(&priv->reset_work, orinoco_reset); 2197 INIT_WORK(&priv->join_work, orinoco_join_ap); 2198 INIT_WORK(&priv->wevent_work, orinoco_send_wevents); 2199 2200 INIT_LIST_HEAD(&priv->rx_list); 2201 tasklet_setup(&priv->rx_tasklet, orinoco_rx_isr_tasklet); 2202 2203 spin_lock_init(&priv->scan_lock); 2204 INIT_LIST_HEAD(&priv->scan_list); 2205 INIT_WORK(&priv->process_scan, orinoco_process_scan_results); 2206 2207 priv->last_linkstatus = 0xffff; 2208 2209 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP) 2210 priv->cached_pri_fw = NULL; 2211 priv->cached_fw = NULL; 2212 #endif 2213 2214 /* Register PM notifiers */ 2215 orinoco_register_pm_notifier(priv); 2216 2217 return priv; 2218 } 2219 EXPORT_SYMBOL(alloc_orinocodev); 2220 2221 /* We can only support a single interface. We provide a separate 2222 * function to set it up to distinguish between hardware 2223 * initialisation and interface setup. 2224 * 2225 * The base_addr and irq parameters are passed on to netdev for use 2226 * with SIOCGIFMAP. 2227 */ 2228 int orinoco_if_add(struct orinoco_private *priv, 2229 unsigned long base_addr, 2230 unsigned int irq, 2231 const struct net_device_ops *ops) 2232 { 2233 struct wiphy *wiphy = priv_to_wiphy(priv); 2234 struct wireless_dev *wdev; 2235 struct net_device *dev; 2236 int ret; 2237 2238 dev = alloc_etherdev(sizeof(struct wireless_dev)); 2239 2240 if (!dev) 2241 return -ENOMEM; 2242 2243 /* Initialise wireless_dev */ 2244 wdev = netdev_priv(dev); 2245 wdev->wiphy = wiphy; 2246 wdev->iftype = NL80211_IFTYPE_STATION; 2247 2248 /* Setup / override net_device fields */ 2249 dev->ieee80211_ptr = wdev; 2250 dev->watchdog_timeo = HZ; /* 1 second timeout */ 2251 dev->wireless_handlers = &orinoco_handler_def; 2252 #ifdef WIRELESS_SPY 2253 dev->wireless_data = &priv->wireless_data; 2254 #endif 2255 /* Default to standard ops if not set */ 2256 if (ops) 2257 dev->netdev_ops = ops; 2258 else 2259 dev->netdev_ops = &orinoco_netdev_ops; 2260 2261 /* we use the default eth_mac_addr for setting the MAC addr */ 2262 2263 /* Reserve space in skb for the SNAP header */ 2264 dev->needed_headroom = ENCAPS_OVERHEAD; 2265 2266 netif_carrier_off(dev); 2267 2268 eth_hw_addr_set(dev, wiphy->perm_addr); 2269 2270 dev->base_addr = base_addr; 2271 dev->irq = irq; 2272 2273 dev->min_mtu = ORINOCO_MIN_MTU; 2274 dev->max_mtu = ORINOCO_MAX_MTU; 2275 2276 SET_NETDEV_DEV(dev, priv->dev); 2277 ret = register_netdev(dev); 2278 if (ret) 2279 goto fail; 2280 2281 priv->ndev = dev; 2282 2283 /* Report what we've done */ 2284 dev_dbg(priv->dev, "Registered interface %s.\n", dev->name); 2285 2286 return 0; 2287 2288 fail: 2289 free_netdev(dev); 2290 return ret; 2291 } 2292 EXPORT_SYMBOL(orinoco_if_add); 2293 2294 void orinoco_if_del(struct orinoco_private *priv) 2295 { 2296 struct net_device *dev = priv->ndev; 2297 2298 unregister_netdev(dev); 2299 free_netdev(dev); 2300 } 2301 EXPORT_SYMBOL(orinoco_if_del); 2302 2303 void free_orinocodev(struct orinoco_private *priv) 2304 { 2305 struct wiphy *wiphy = priv_to_wiphy(priv); 2306 struct orinoco_rx_data *rx_data, *temp; 2307 struct orinoco_scan_data *sd, *sdtemp; 2308 2309 /* If the tasklet is scheduled when we call tasklet_kill it 2310 * will run one final time. However the tasklet will only 2311 * drain priv->rx_list if the hw is still available. */ 2312 tasklet_kill(&priv->rx_tasklet); 2313 2314 /* Explicitly drain priv->rx_list */ 2315 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) { 2316 list_del(&rx_data->list); 2317 2318 dev_kfree_skb(rx_data->skb); 2319 kfree(rx_data->desc); 2320 kfree(rx_data); 2321 } 2322 2323 cancel_work_sync(&priv->process_scan); 2324 /* Explicitly drain priv->scan_list */ 2325 list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) { 2326 list_del(&sd->list); 2327 2328 if (sd->len > 0) 2329 kfree(sd->buf); 2330 kfree(sd); 2331 } 2332 2333 orinoco_unregister_pm_notifier(priv); 2334 orinoco_uncache_fw(priv); 2335 2336 priv->wpa_ie_len = 0; 2337 kfree(priv->wpa_ie); 2338 orinoco_mic_free(priv); 2339 wiphy_free(wiphy); 2340 } 2341 EXPORT_SYMBOL(free_orinocodev); 2342 2343 int orinoco_up(struct orinoco_private *priv) 2344 { 2345 struct net_device *dev = priv->ndev; 2346 unsigned long flags; 2347 int err; 2348 2349 priv->hw.ops->lock_irqsave(&priv->lock, &flags); 2350 2351 err = orinoco_reinit_firmware(priv); 2352 if (err) { 2353 printk(KERN_ERR "%s: Error %d re-initializing firmware\n", 2354 dev->name, err); 2355 goto exit; 2356 } 2357 2358 netif_device_attach(dev); 2359 priv->hw_unavailable--; 2360 2361 if (priv->open && !priv->hw_unavailable) { 2362 err = __orinoco_up(priv); 2363 if (err) 2364 printk(KERN_ERR "%s: Error %d restarting card\n", 2365 dev->name, err); 2366 } 2367 2368 exit: 2369 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); 2370 2371 return 0; 2372 } 2373 EXPORT_SYMBOL(orinoco_up); 2374 2375 void orinoco_down(struct orinoco_private *priv) 2376 { 2377 struct net_device *dev = priv->ndev; 2378 unsigned long flags; 2379 int err; 2380 2381 priv->hw.ops->lock_irqsave(&priv->lock, &flags); 2382 err = __orinoco_down(priv); 2383 if (err) 2384 printk(KERN_WARNING "%s: Error %d downing interface\n", 2385 dev->name, err); 2386 2387 netif_device_detach(dev); 2388 priv->hw_unavailable++; 2389 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); 2390 } 2391 EXPORT_SYMBOL(orinoco_down); 2392 2393 /********************************************************************/ 2394 /* Module initialization */ 2395 /********************************************************************/ 2396 2397 /* Can't be declared "const" or the whole __initdata section will 2398 * become const */ 2399 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION 2400 " (David Gibson <hermes@gibson.dropbear.id.au>, " 2401 "Pavel Roskin <proski@gnu.org>, et al)"; 2402 2403 static int __init init_orinoco(void) 2404 { 2405 printk(KERN_DEBUG "%s\n", version); 2406 return 0; 2407 } 2408 2409 static void __exit exit_orinoco(void) 2410 { 2411 } 2412 2413 module_init(init_orinoco); 2414 module_exit(exit_orinoco); 2415