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 struct net_device_stats *orinoco_get_stats(struct net_device *dev) 298 { 299 struct orinoco_private *priv = ndev_priv(dev); 300 301 return &priv->stats; 302 } 303 EXPORT_SYMBOL(orinoco_get_stats); 304 305 void orinoco_set_multicast_list(struct net_device *dev) 306 { 307 struct orinoco_private *priv = ndev_priv(dev); 308 unsigned long flags; 309 310 if (orinoco_lock(priv, &flags) != 0) { 311 printk(KERN_DEBUG "%s: orinoco_set_multicast_list() " 312 "called when hw_unavailable\n", dev->name); 313 return; 314 } 315 316 __orinoco_set_multicast_list(dev); 317 orinoco_unlock(priv, &flags); 318 } 319 EXPORT_SYMBOL(orinoco_set_multicast_list); 320 321 int orinoco_change_mtu(struct net_device *dev, int new_mtu) 322 { 323 struct orinoco_private *priv = ndev_priv(dev); 324 325 if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU)) 326 return -EINVAL; 327 328 /* MTU + encapsulation + header length */ 329 if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) > 330 (priv->nicbuf_size - ETH_HLEN)) 331 return -EINVAL; 332 333 dev->mtu = new_mtu; 334 335 return 0; 336 } 337 EXPORT_SYMBOL(orinoco_change_mtu); 338 339 /********************************************************************/ 340 /* Tx path */ 341 /********************************************************************/ 342 343 /* Add encapsulation and MIC to the existing SKB. 344 * The main xmit routine will then send the whole lot to the card. 345 * Need 8 bytes headroom 346 * Need 8 bytes tailroom 347 * 348 * With encapsulated ethernet II frame 349 * -------- 350 * 803.3 header (14 bytes) 351 * dst[6] 352 * -------- src[6] 353 * 803.3 header (14 bytes) len[2] 354 * dst[6] 803.2 header (8 bytes) 355 * src[6] encaps[6] 356 * len[2] <- leave alone -> len[2] 357 * -------- -------- <-- 0 358 * Payload Payload 359 * ... ... 360 * 361 * -------- -------- 362 * MIC (8 bytes) 363 * -------- 364 * 365 * returns 0 on success, -ENOMEM on error. 366 */ 367 int orinoco_process_xmit_skb(struct sk_buff *skb, 368 struct net_device *dev, 369 struct orinoco_private *priv, 370 int *tx_control, 371 u8 *mic_buf) 372 { 373 struct orinoco_tkip_key *key; 374 struct ethhdr *eh; 375 int do_mic; 376 377 key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key; 378 379 do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) && 380 (key != NULL)); 381 382 if (do_mic) 383 *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) | 384 HERMES_TXCTRL_MIC; 385 386 eh = (struct ethhdr *)skb->data; 387 388 /* Encapsulate Ethernet-II frames */ 389 if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */ 390 struct header_struct { 391 struct ethhdr eth; /* 802.3 header */ 392 u8 encap[6]; /* 802.2 header */ 393 } __packed hdr; 394 int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN); 395 396 if (skb_headroom(skb) < ENCAPS_OVERHEAD) { 397 if (net_ratelimit()) 398 printk(KERN_ERR 399 "%s: Not enough headroom for 802.2 headers %d\n", 400 dev->name, skb_headroom(skb)); 401 return -ENOMEM; 402 } 403 404 /* Fill in new header */ 405 memcpy(&hdr.eth, eh, 2 * ETH_ALEN); 406 hdr.eth.h_proto = htons(len); 407 memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr)); 408 409 /* Make room for the new header, and copy it in */ 410 eh = (struct ethhdr *) skb_push(skb, ENCAPS_OVERHEAD); 411 memcpy(eh, &hdr, sizeof(hdr)); 412 } 413 414 /* Calculate Michael MIC */ 415 if (do_mic) { 416 size_t len = skb->len - ETH_HLEN; 417 u8 *mic = &mic_buf[0]; 418 419 /* Have to write to an even address, so copy the spare 420 * byte across */ 421 if (skb->len % 2) { 422 *mic = skb->data[skb->len - 1]; 423 mic++; 424 } 425 426 orinoco_mic(priv->tx_tfm_mic, key->tx_mic, 427 eh->h_dest, eh->h_source, 0 /* priority */, 428 skb->data + ETH_HLEN, 429 len, mic); 430 } 431 432 return 0; 433 } 434 EXPORT_SYMBOL(orinoco_process_xmit_skb); 435 436 static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev) 437 { 438 struct orinoco_private *priv = ndev_priv(dev); 439 struct net_device_stats *stats = &priv->stats; 440 struct hermes *hw = &priv->hw; 441 int err = 0; 442 u16 txfid = priv->txfid; 443 int tx_control; 444 unsigned long flags; 445 u8 mic_buf[MICHAEL_MIC_LEN + 1]; 446 447 if (!netif_running(dev)) { 448 printk(KERN_ERR "%s: Tx on stopped device!\n", 449 dev->name); 450 return NETDEV_TX_BUSY; 451 } 452 453 if (netif_queue_stopped(dev)) { 454 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n", 455 dev->name); 456 return NETDEV_TX_BUSY; 457 } 458 459 if (orinoco_lock(priv, &flags) != 0) { 460 printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n", 461 dev->name); 462 return NETDEV_TX_BUSY; 463 } 464 465 if (!netif_carrier_ok(dev) || 466 (priv->iw_mode == NL80211_IFTYPE_MONITOR)) { 467 /* Oops, the firmware hasn't established a connection, 468 silently drop the packet (this seems to be the 469 safest approach). */ 470 goto drop; 471 } 472 473 /* Check packet length */ 474 if (skb->len < ETH_HLEN) 475 goto drop; 476 477 tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX; 478 479 err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control, 480 &mic_buf[0]); 481 if (err) 482 goto drop; 483 484 if (priv->has_alt_txcntl) { 485 /* WPA enabled firmwares have tx_cntl at the end of 486 * the 802.11 header. So write zeroed descriptor and 487 * 802.11 header at the same time 488 */ 489 char desc[HERMES_802_3_OFFSET]; 490 __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET]; 491 492 memset(&desc, 0, sizeof(desc)); 493 494 *txcntl = cpu_to_le16(tx_control); 495 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), 496 txfid, 0); 497 if (err) { 498 if (net_ratelimit()) 499 printk(KERN_ERR "%s: Error %d writing Tx " 500 "descriptor to BAP\n", dev->name, err); 501 goto busy; 502 } 503 } else { 504 struct hermes_tx_descriptor desc; 505 506 memset(&desc, 0, sizeof(desc)); 507 508 desc.tx_control = cpu_to_le16(tx_control); 509 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), 510 txfid, 0); 511 if (err) { 512 if (net_ratelimit()) 513 printk(KERN_ERR "%s: Error %d writing Tx " 514 "descriptor to BAP\n", dev->name, err); 515 goto busy; 516 } 517 518 /* Clear the 802.11 header and data length fields - some 519 * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused 520 * if this isn't done. */ 521 hermes_clear_words(hw, HERMES_DATA0, 522 HERMES_802_3_OFFSET - HERMES_802_11_OFFSET); 523 } 524 525 err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len, 526 txfid, HERMES_802_3_OFFSET); 527 if (err) { 528 printk(KERN_ERR "%s: Error %d writing packet to BAP\n", 529 dev->name, err); 530 goto busy; 531 } 532 533 if (tx_control & HERMES_TXCTRL_MIC) { 534 size_t offset = HERMES_802_3_OFFSET + skb->len; 535 size_t len = MICHAEL_MIC_LEN; 536 537 if (offset % 2) { 538 offset--; 539 len++; 540 } 541 err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len, 542 txfid, offset); 543 if (err) { 544 printk(KERN_ERR "%s: Error %d writing MIC to BAP\n", 545 dev->name, err); 546 goto busy; 547 } 548 } 549 550 /* Finally, we actually initiate the send */ 551 netif_stop_queue(dev); 552 553 err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL, 554 txfid, NULL); 555 if (err) { 556 netif_start_queue(dev); 557 if (net_ratelimit()) 558 printk(KERN_ERR "%s: Error %d transmitting packet\n", 559 dev->name, err); 560 goto busy; 561 } 562 563 stats->tx_bytes += HERMES_802_3_OFFSET + skb->len; 564 goto ok; 565 566 drop: 567 stats->tx_errors++; 568 stats->tx_dropped++; 569 570 ok: 571 orinoco_unlock(priv, &flags); 572 dev_kfree_skb(skb); 573 return NETDEV_TX_OK; 574 575 busy: 576 if (err == -EIO) 577 schedule_work(&priv->reset_work); 578 orinoco_unlock(priv, &flags); 579 return NETDEV_TX_BUSY; 580 } 581 582 static void __orinoco_ev_alloc(struct net_device *dev, struct hermes *hw) 583 { 584 struct orinoco_private *priv = ndev_priv(dev); 585 u16 fid = hermes_read_regn(hw, ALLOCFID); 586 587 if (fid != priv->txfid) { 588 if (fid != DUMMY_FID) 589 printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n", 590 dev->name, fid); 591 return; 592 } 593 594 hermes_write_regn(hw, ALLOCFID, DUMMY_FID); 595 } 596 597 static void __orinoco_ev_tx(struct net_device *dev, struct hermes *hw) 598 { 599 struct orinoco_private *priv = ndev_priv(dev); 600 struct net_device_stats *stats = &priv->stats; 601 602 stats->tx_packets++; 603 604 netif_wake_queue(dev); 605 606 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID); 607 } 608 609 static void __orinoco_ev_txexc(struct net_device *dev, struct hermes *hw) 610 { 611 struct orinoco_private *priv = ndev_priv(dev); 612 struct net_device_stats *stats = &priv->stats; 613 u16 fid = hermes_read_regn(hw, TXCOMPLFID); 614 u16 status; 615 struct hermes_txexc_data hdr; 616 int err = 0; 617 618 if (fid == DUMMY_FID) 619 return; /* Nothing's really happened */ 620 621 /* Read part of the frame header - we need status and addr1 */ 622 err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr, 623 sizeof(struct hermes_txexc_data), 624 fid, 0); 625 626 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID); 627 stats->tx_errors++; 628 629 if (err) { 630 printk(KERN_WARNING "%s: Unable to read descriptor on Tx error " 631 "(FID=%04X error %d)\n", 632 dev->name, fid, err); 633 return; 634 } 635 636 DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name, 637 err, fid); 638 639 /* We produce a TXDROP event only for retry or lifetime 640 * exceeded, because that's the only status that really mean 641 * that this particular node went away. 642 * Other errors means that *we* screwed up. - Jean II */ 643 status = le16_to_cpu(hdr.desc.status); 644 if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) { 645 union iwreq_data wrqu; 646 647 /* Copy 802.11 dest address. 648 * We use the 802.11 header because the frame may 649 * not be 802.3 or may be mangled... 650 * In Ad-Hoc mode, it will be the node address. 651 * In managed mode, it will be most likely the AP addr 652 * User space will figure out how to convert it to 653 * whatever it needs (IP address or else). 654 * - Jean II */ 655 memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN); 656 wrqu.addr.sa_family = ARPHRD_ETHER; 657 658 /* Send event to user space */ 659 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL); 660 } 661 662 netif_wake_queue(dev); 663 } 664 665 void orinoco_tx_timeout(struct net_device *dev) 666 { 667 struct orinoco_private *priv = ndev_priv(dev); 668 struct net_device_stats *stats = &priv->stats; 669 struct hermes *hw = &priv->hw; 670 671 printk(KERN_WARNING "%s: Tx timeout! " 672 "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n", 673 dev->name, hermes_read_regn(hw, ALLOCFID), 674 hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT)); 675 676 stats->tx_errors++; 677 678 schedule_work(&priv->reset_work); 679 } 680 EXPORT_SYMBOL(orinoco_tx_timeout); 681 682 /********************************************************************/ 683 /* Rx path (data frames) */ 684 /********************************************************************/ 685 686 /* Does the frame have a SNAP header indicating it should be 687 * de-encapsulated to Ethernet-II? */ 688 static inline int is_ethersnap(void *_hdr) 689 { 690 u8 *hdr = _hdr; 691 692 /* We de-encapsulate all packets which, a) have SNAP headers 693 * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header 694 * and where b) the OUI of the SNAP header is 00:00:00 or 695 * 00:00:f8 - we need both because different APs appear to use 696 * different OUIs for some reason */ 697 return (memcmp(hdr, &encaps_hdr, 5) == 0) 698 && ((hdr[5] == 0x00) || (hdr[5] == 0xf8)); 699 } 700 701 static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac, 702 int level, int noise) 703 { 704 struct iw_quality wstats; 705 wstats.level = level - 0x95; 706 wstats.noise = noise - 0x95; 707 wstats.qual = (level > noise) ? (level - noise) : 0; 708 wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM; 709 /* Update spy records */ 710 wireless_spy_update(dev, mac, &wstats); 711 } 712 713 static void orinoco_stat_gather(struct net_device *dev, 714 struct sk_buff *skb, 715 struct hermes_rx_descriptor *desc) 716 { 717 struct orinoco_private *priv = ndev_priv(dev); 718 719 /* Using spy support with lots of Rx packets, like in an 720 * infrastructure (AP), will really slow down everything, because 721 * the MAC address must be compared to each entry of the spy list. 722 * If the user really asks for it (set some address in the 723 * spy list), we do it, but he will pay the price. 724 * Note that to get here, you need both WIRELESS_SPY 725 * compiled in AND some addresses in the list !!! 726 */ 727 /* Note : gcc will optimise the whole section away if 728 * WIRELESS_SPY is not defined... - Jean II */ 729 if (SPY_NUMBER(priv)) { 730 orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN, 731 desc->signal, desc->silence); 732 } 733 } 734 735 /* 736 * orinoco_rx_monitor - handle received monitor frames. 737 * 738 * Arguments: 739 * dev network device 740 * rxfid received FID 741 * desc rx descriptor of the frame 742 * 743 * Call context: interrupt 744 */ 745 static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid, 746 struct hermes_rx_descriptor *desc) 747 { 748 u32 hdrlen = 30; /* return full header by default */ 749 u32 datalen = 0; 750 u16 fc; 751 int err; 752 int len; 753 struct sk_buff *skb; 754 struct orinoco_private *priv = ndev_priv(dev); 755 struct net_device_stats *stats = &priv->stats; 756 struct hermes *hw = &priv->hw; 757 758 len = le16_to_cpu(desc->data_len); 759 760 /* Determine the size of the header and the data */ 761 fc = le16_to_cpu(desc->frame_ctl); 762 switch (fc & IEEE80211_FCTL_FTYPE) { 763 case IEEE80211_FTYPE_DATA: 764 if ((fc & IEEE80211_FCTL_TODS) 765 && (fc & IEEE80211_FCTL_FROMDS)) 766 hdrlen = 30; 767 else 768 hdrlen = 24; 769 datalen = len; 770 break; 771 case IEEE80211_FTYPE_MGMT: 772 hdrlen = 24; 773 datalen = len; 774 break; 775 case IEEE80211_FTYPE_CTL: 776 switch (fc & IEEE80211_FCTL_STYPE) { 777 case IEEE80211_STYPE_PSPOLL: 778 case IEEE80211_STYPE_RTS: 779 case IEEE80211_STYPE_CFEND: 780 case IEEE80211_STYPE_CFENDACK: 781 hdrlen = 16; 782 break; 783 case IEEE80211_STYPE_CTS: 784 case IEEE80211_STYPE_ACK: 785 hdrlen = 10; 786 break; 787 } 788 break; 789 default: 790 /* Unknown frame type */ 791 break; 792 } 793 794 /* sanity check the length */ 795 if (datalen > IEEE80211_MAX_DATA_LEN + 12) { 796 printk(KERN_DEBUG "%s: oversized monitor frame, " 797 "data length = %d\n", dev->name, datalen); 798 stats->rx_length_errors++; 799 goto update_stats; 800 } 801 802 skb = dev_alloc_skb(hdrlen + datalen); 803 if (!skb) { 804 printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n", 805 dev->name); 806 goto update_stats; 807 } 808 809 /* Copy the 802.11 header to the skb */ 810 memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen); 811 skb_reset_mac_header(skb); 812 813 /* If any, copy the data from the card to the skb */ 814 if (datalen > 0) { 815 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen), 816 ALIGN(datalen, 2), rxfid, 817 HERMES_802_2_OFFSET); 818 if (err) { 819 printk(KERN_ERR "%s: error %d reading monitor frame\n", 820 dev->name, err); 821 goto drop; 822 } 823 } 824 825 skb->dev = dev; 826 skb->ip_summed = CHECKSUM_NONE; 827 skb->pkt_type = PACKET_OTHERHOST; 828 skb->protocol = cpu_to_be16(ETH_P_802_2); 829 830 stats->rx_packets++; 831 stats->rx_bytes += skb->len; 832 833 netif_rx(skb); 834 return; 835 836 drop: 837 dev_kfree_skb_irq(skb); 838 update_stats: 839 stats->rx_errors++; 840 stats->rx_dropped++; 841 } 842 843 void __orinoco_ev_rx(struct net_device *dev, struct hermes *hw) 844 { 845 struct orinoco_private *priv = ndev_priv(dev); 846 struct net_device_stats *stats = &priv->stats; 847 struct iw_statistics *wstats = &priv->wstats; 848 struct sk_buff *skb = NULL; 849 u16 rxfid, status; 850 int length; 851 struct hermes_rx_descriptor *desc; 852 struct orinoco_rx_data *rx_data; 853 int err; 854 855 desc = kmalloc(sizeof(*desc), GFP_ATOMIC); 856 if (!desc) 857 goto update_stats; 858 859 rxfid = hermes_read_regn(hw, RXFID); 860 861 err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc), 862 rxfid, 0); 863 if (err) { 864 printk(KERN_ERR "%s: error %d reading Rx descriptor. " 865 "Frame dropped.\n", dev->name, err); 866 goto update_stats; 867 } 868 869 status = le16_to_cpu(desc->status); 870 871 if (status & HERMES_RXSTAT_BADCRC) { 872 DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n", 873 dev->name); 874 stats->rx_crc_errors++; 875 goto update_stats; 876 } 877 878 /* Handle frames in monitor mode */ 879 if (priv->iw_mode == NL80211_IFTYPE_MONITOR) { 880 orinoco_rx_monitor(dev, rxfid, desc); 881 goto out; 882 } 883 884 if (status & HERMES_RXSTAT_UNDECRYPTABLE) { 885 DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n", 886 dev->name); 887 wstats->discard.code++; 888 goto update_stats; 889 } 890 891 length = le16_to_cpu(desc->data_len); 892 893 /* Sanity checks */ 894 if (length < 3) { /* No for even an 802.2 LLC header */ 895 /* At least on Symbol firmware with PCF we get quite a 896 lot of these legitimately - Poll frames with no 897 data. */ 898 goto out; 899 } 900 if (length > IEEE80211_MAX_DATA_LEN) { 901 printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n", 902 dev->name, length); 903 stats->rx_length_errors++; 904 goto update_stats; 905 } 906 907 /* Payload size does not include Michael MIC. Increase payload 908 * size to read it together with the data. */ 909 if (status & HERMES_RXSTAT_MIC) 910 length += MICHAEL_MIC_LEN; 911 912 /* We need space for the packet data itself, plus an ethernet 913 header, plus 2 bytes so we can align the IP header on a 914 32bit boundary, plus 1 byte so we can read in odd length 915 packets from the card, which has an IO granularity of 16 916 bits */ 917 skb = dev_alloc_skb(length + ETH_HLEN + 2 + 1); 918 if (!skb) { 919 printk(KERN_WARNING "%s: Can't allocate skb for Rx\n", 920 dev->name); 921 goto update_stats; 922 } 923 924 /* We'll prepend the header, so reserve space for it. The worst 925 case is no decapsulation, when 802.3 header is prepended and 926 nothing is removed. 2 is for aligning the IP header. */ 927 skb_reserve(skb, ETH_HLEN + 2); 928 929 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length), 930 ALIGN(length, 2), rxfid, 931 HERMES_802_2_OFFSET); 932 if (err) { 933 printk(KERN_ERR "%s: error %d reading frame. " 934 "Frame dropped.\n", dev->name, err); 935 goto drop; 936 } 937 938 /* Add desc and skb to rx queue */ 939 rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC); 940 if (!rx_data) 941 goto drop; 942 943 rx_data->desc = desc; 944 rx_data->skb = skb; 945 list_add_tail(&rx_data->list, &priv->rx_list); 946 tasklet_schedule(&priv->rx_tasklet); 947 948 return; 949 950 drop: 951 dev_kfree_skb_irq(skb); 952 update_stats: 953 stats->rx_errors++; 954 stats->rx_dropped++; 955 out: 956 kfree(desc); 957 } 958 EXPORT_SYMBOL(__orinoco_ev_rx); 959 960 static void orinoco_rx(struct net_device *dev, 961 struct hermes_rx_descriptor *desc, 962 struct sk_buff *skb) 963 { 964 struct orinoco_private *priv = ndev_priv(dev); 965 struct net_device_stats *stats = &priv->stats; 966 u16 status, fc; 967 int length; 968 struct ethhdr *hdr; 969 970 status = le16_to_cpu(desc->status); 971 length = le16_to_cpu(desc->data_len); 972 fc = le16_to_cpu(desc->frame_ctl); 973 974 /* Calculate and check MIC */ 975 if (status & HERMES_RXSTAT_MIC) { 976 struct orinoco_tkip_key *key; 977 int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >> 978 HERMES_MIC_KEY_ID_SHIFT); 979 u8 mic[MICHAEL_MIC_LEN]; 980 u8 *rxmic; 981 u8 *src = (fc & IEEE80211_FCTL_FROMDS) ? 982 desc->addr3 : desc->addr2; 983 984 /* Extract Michael MIC from payload */ 985 rxmic = skb->data + skb->len - MICHAEL_MIC_LEN; 986 987 skb_trim(skb, skb->len - MICHAEL_MIC_LEN); 988 length -= MICHAEL_MIC_LEN; 989 990 key = (struct orinoco_tkip_key *) priv->keys[key_id].key; 991 992 if (!key) { 993 printk(KERN_WARNING "%s: Received encrypted frame from " 994 "%pM using key %i, but key is not installed\n", 995 dev->name, src, key_id); 996 goto drop; 997 } 998 999 orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src, 1000 0, /* priority or QoS? */ 1001 skb->data, skb->len, &mic[0]); 1002 1003 if (memcmp(mic, rxmic, 1004 MICHAEL_MIC_LEN)) { 1005 union iwreq_data wrqu; 1006 struct iw_michaelmicfailure wxmic; 1007 1008 printk(KERN_WARNING "%s: " 1009 "Invalid Michael MIC in data frame from %pM, " 1010 "using key %i\n", 1011 dev->name, src, key_id); 1012 1013 /* TODO: update stats */ 1014 1015 /* Notify userspace */ 1016 memset(&wxmic, 0, sizeof(wxmic)); 1017 wxmic.flags = key_id & IW_MICFAILURE_KEY_ID; 1018 wxmic.flags |= (desc->addr1[0] & 1) ? 1019 IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE; 1020 wxmic.src_addr.sa_family = ARPHRD_ETHER; 1021 memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN); 1022 1023 (void) orinoco_hw_get_tkip_iv(priv, key_id, 1024 &wxmic.tsc[0]); 1025 1026 memset(&wrqu, 0, sizeof(wrqu)); 1027 wrqu.data.length = sizeof(wxmic); 1028 wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, 1029 (char *) &wxmic); 1030 1031 goto drop; 1032 } 1033 } 1034 1035 /* Handle decapsulation 1036 * In most cases, the firmware tell us about SNAP frames. 1037 * For some reason, the SNAP frames sent by LinkSys APs 1038 * are not properly recognised by most firmwares. 1039 * So, check ourselves */ 1040 if (length >= ENCAPS_OVERHEAD && 1041 (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) || 1042 ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) || 1043 is_ethersnap(skb->data))) { 1044 /* These indicate a SNAP within 802.2 LLC within 1045 802.11 frame which we'll need to de-encapsulate to 1046 the original EthernetII frame. */ 1047 hdr = (struct ethhdr *)skb_push(skb, 1048 ETH_HLEN - ENCAPS_OVERHEAD); 1049 } else { 1050 /* 802.3 frame - prepend 802.3 header as is */ 1051 hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN); 1052 hdr->h_proto = htons(length); 1053 } 1054 memcpy(hdr->h_dest, desc->addr1, ETH_ALEN); 1055 if (fc & IEEE80211_FCTL_FROMDS) 1056 memcpy(hdr->h_source, desc->addr3, ETH_ALEN); 1057 else 1058 memcpy(hdr->h_source, desc->addr2, ETH_ALEN); 1059 1060 skb->protocol = eth_type_trans(skb, dev); 1061 skb->ip_summed = CHECKSUM_NONE; 1062 if (fc & IEEE80211_FCTL_TODS) 1063 skb->pkt_type = PACKET_OTHERHOST; 1064 1065 /* Process the wireless stats if needed */ 1066 orinoco_stat_gather(dev, skb, desc); 1067 1068 /* Pass the packet to the networking stack */ 1069 netif_rx(skb); 1070 stats->rx_packets++; 1071 stats->rx_bytes += length; 1072 1073 return; 1074 1075 drop: 1076 dev_kfree_skb(skb); 1077 stats->rx_errors++; 1078 stats->rx_dropped++; 1079 } 1080 1081 static void orinoco_rx_isr_tasklet(unsigned long data) 1082 { 1083 struct orinoco_private *priv = (struct orinoco_private *) data; 1084 struct net_device *dev = priv->ndev; 1085 struct orinoco_rx_data *rx_data, *temp; 1086 struct hermes_rx_descriptor *desc; 1087 struct sk_buff *skb; 1088 unsigned long flags; 1089 1090 /* orinoco_rx requires the driver lock, and we also need to 1091 * protect priv->rx_list, so just hold the lock over the 1092 * lot. 1093 * 1094 * If orinoco_lock fails, we've unplugged the card. In this 1095 * case just abort. */ 1096 if (orinoco_lock(priv, &flags) != 0) 1097 return; 1098 1099 /* extract desc and skb from queue */ 1100 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) { 1101 desc = rx_data->desc; 1102 skb = rx_data->skb; 1103 list_del(&rx_data->list); 1104 kfree(rx_data); 1105 1106 orinoco_rx(dev, desc, skb); 1107 1108 kfree(desc); 1109 } 1110 1111 orinoco_unlock(priv, &flags); 1112 } 1113 1114 /********************************************************************/ 1115 /* Rx path (info frames) */ 1116 /********************************************************************/ 1117 1118 static void print_linkstatus(struct net_device *dev, u16 status) 1119 { 1120 char *s; 1121 1122 if (suppress_linkstatus) 1123 return; 1124 1125 switch (status) { 1126 case HERMES_LINKSTATUS_NOT_CONNECTED: 1127 s = "Not Connected"; 1128 break; 1129 case HERMES_LINKSTATUS_CONNECTED: 1130 s = "Connected"; 1131 break; 1132 case HERMES_LINKSTATUS_DISCONNECTED: 1133 s = "Disconnected"; 1134 break; 1135 case HERMES_LINKSTATUS_AP_CHANGE: 1136 s = "AP Changed"; 1137 break; 1138 case HERMES_LINKSTATUS_AP_OUT_OF_RANGE: 1139 s = "AP Out of Range"; 1140 break; 1141 case HERMES_LINKSTATUS_AP_IN_RANGE: 1142 s = "AP In Range"; 1143 break; 1144 case HERMES_LINKSTATUS_ASSOC_FAILED: 1145 s = "Association Failed"; 1146 break; 1147 default: 1148 s = "UNKNOWN"; 1149 } 1150 1151 printk(KERN_DEBUG "%s: New link status: %s (%04x)\n", 1152 dev->name, s, status); 1153 } 1154 1155 /* Search scan results for requested BSSID, join it if found */ 1156 static void orinoco_join_ap(struct work_struct *work) 1157 { 1158 struct orinoco_private *priv = 1159 container_of(work, struct orinoco_private, join_work); 1160 struct net_device *dev = priv->ndev; 1161 struct hermes *hw = &priv->hw; 1162 int err; 1163 unsigned long flags; 1164 struct join_req { 1165 u8 bssid[ETH_ALEN]; 1166 __le16 channel; 1167 } __packed req; 1168 const int atom_len = offsetof(struct prism2_scan_apinfo, atim); 1169 struct prism2_scan_apinfo *atom = NULL; 1170 int offset = 4; 1171 int found = 0; 1172 u8 *buf; 1173 u16 len; 1174 1175 /* Allocate buffer for scan results */ 1176 buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL); 1177 if (!buf) 1178 return; 1179 1180 if (orinoco_lock(priv, &flags) != 0) 1181 goto fail_lock; 1182 1183 /* Sanity checks in case user changed something in the meantime */ 1184 if (!priv->bssid_fixed) 1185 goto out; 1186 1187 if (strlen(priv->desired_essid) == 0) 1188 goto out; 1189 1190 /* Read scan results from the firmware */ 1191 err = hw->ops->read_ltv(hw, USER_BAP, 1192 HERMES_RID_SCANRESULTSTABLE, 1193 MAX_SCAN_LEN, &len, buf); 1194 if (err) { 1195 printk(KERN_ERR "%s: Cannot read scan results\n", 1196 dev->name); 1197 goto out; 1198 } 1199 1200 len = HERMES_RECLEN_TO_BYTES(len); 1201 1202 /* Go through the scan results looking for the channel of the AP 1203 * we were requested to join */ 1204 for (; offset + atom_len <= len; offset += atom_len) { 1205 atom = (struct prism2_scan_apinfo *) (buf + offset); 1206 if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) { 1207 found = 1; 1208 break; 1209 } 1210 } 1211 1212 if (!found) { 1213 DEBUG(1, "%s: Requested AP not found in scan results\n", 1214 dev->name); 1215 goto out; 1216 } 1217 1218 memcpy(req.bssid, priv->desired_bssid, ETH_ALEN); 1219 req.channel = atom->channel; /* both are little-endian */ 1220 err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST, 1221 &req); 1222 if (err) 1223 printk(KERN_ERR "%s: Error issuing join request\n", dev->name); 1224 1225 out: 1226 orinoco_unlock(priv, &flags); 1227 1228 fail_lock: 1229 kfree(buf); 1230 } 1231 1232 /* Send new BSSID to userspace */ 1233 static void orinoco_send_bssid_wevent(struct orinoco_private *priv) 1234 { 1235 struct net_device *dev = priv->ndev; 1236 struct hermes *hw = &priv->hw; 1237 union iwreq_data wrqu; 1238 int err; 1239 1240 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID, 1241 ETH_ALEN, NULL, wrqu.ap_addr.sa_data); 1242 if (err != 0) 1243 return; 1244 1245 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1246 1247 /* Send event to user space */ 1248 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1249 } 1250 1251 static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv) 1252 { 1253 struct net_device *dev = priv->ndev; 1254 struct hermes *hw = &priv->hw; 1255 union iwreq_data wrqu; 1256 int err; 1257 u8 buf[88]; 1258 u8 *ie; 1259 1260 if (!priv->has_wpa) 1261 return; 1262 1263 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO, 1264 sizeof(buf), NULL, &buf); 1265 if (err != 0) 1266 return; 1267 1268 ie = orinoco_get_wpa_ie(buf, sizeof(buf)); 1269 if (ie) { 1270 int rem = sizeof(buf) - (ie - &buf[0]); 1271 wrqu.data.length = ie[1] + 2; 1272 if (wrqu.data.length > rem) 1273 wrqu.data.length = rem; 1274 1275 if (wrqu.data.length) 1276 /* Send event to user space */ 1277 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie); 1278 } 1279 } 1280 1281 static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv) 1282 { 1283 struct net_device *dev = priv->ndev; 1284 struct hermes *hw = &priv->hw; 1285 union iwreq_data wrqu; 1286 int err; 1287 u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */ 1288 u8 *ie; 1289 1290 if (!priv->has_wpa) 1291 return; 1292 1293 err = hw->ops->read_ltv(hw, USER_BAP, 1294 HERMES_RID_CURRENT_ASSOC_RESP_INFO, 1295 sizeof(buf), NULL, &buf); 1296 if (err != 0) 1297 return; 1298 1299 ie = orinoco_get_wpa_ie(buf, sizeof(buf)); 1300 if (ie) { 1301 int rem = sizeof(buf) - (ie - &buf[0]); 1302 wrqu.data.length = ie[1] + 2; 1303 if (wrqu.data.length > rem) 1304 wrqu.data.length = rem; 1305 1306 if (wrqu.data.length) 1307 /* Send event to user space */ 1308 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie); 1309 } 1310 } 1311 1312 static void orinoco_send_wevents(struct work_struct *work) 1313 { 1314 struct orinoco_private *priv = 1315 container_of(work, struct orinoco_private, wevent_work); 1316 unsigned long flags; 1317 1318 if (orinoco_lock(priv, &flags) != 0) 1319 return; 1320 1321 orinoco_send_assocreqie_wevent(priv); 1322 orinoco_send_assocrespie_wevent(priv); 1323 orinoco_send_bssid_wevent(priv); 1324 1325 orinoco_unlock(priv, &flags); 1326 } 1327 1328 static void qbuf_scan(struct orinoco_private *priv, void *buf, 1329 int len, int type) 1330 { 1331 struct orinoco_scan_data *sd; 1332 unsigned long flags; 1333 1334 sd = kmalloc(sizeof(*sd), GFP_ATOMIC); 1335 if (!sd) 1336 return; 1337 1338 sd->buf = buf; 1339 sd->len = len; 1340 sd->type = type; 1341 1342 spin_lock_irqsave(&priv->scan_lock, flags); 1343 list_add_tail(&sd->list, &priv->scan_list); 1344 spin_unlock_irqrestore(&priv->scan_lock, flags); 1345 1346 schedule_work(&priv->process_scan); 1347 } 1348 1349 static void qabort_scan(struct orinoco_private *priv) 1350 { 1351 struct orinoco_scan_data *sd; 1352 unsigned long flags; 1353 1354 sd = kmalloc(sizeof(*sd), GFP_ATOMIC); 1355 if (!sd) 1356 return; 1357 1358 sd->len = -1; /* Abort */ 1359 1360 spin_lock_irqsave(&priv->scan_lock, flags); 1361 list_add_tail(&sd->list, &priv->scan_list); 1362 spin_unlock_irqrestore(&priv->scan_lock, flags); 1363 1364 schedule_work(&priv->process_scan); 1365 } 1366 1367 static void orinoco_process_scan_results(struct work_struct *work) 1368 { 1369 struct orinoco_private *priv = 1370 container_of(work, struct orinoco_private, process_scan); 1371 struct orinoco_scan_data *sd, *temp; 1372 unsigned long flags; 1373 void *buf; 1374 int len; 1375 int type; 1376 1377 spin_lock_irqsave(&priv->scan_lock, flags); 1378 list_for_each_entry_safe(sd, temp, &priv->scan_list, list) { 1379 1380 buf = sd->buf; 1381 len = sd->len; 1382 type = sd->type; 1383 1384 list_del(&sd->list); 1385 spin_unlock_irqrestore(&priv->scan_lock, flags); 1386 kfree(sd); 1387 1388 if (len > 0) { 1389 if (type == HERMES_INQ_CHANNELINFO) 1390 orinoco_add_extscan_result(priv, buf, len); 1391 else 1392 orinoco_add_hostscan_results(priv, buf, len); 1393 1394 kfree(buf); 1395 } else { 1396 /* Either abort or complete the scan */ 1397 orinoco_scan_done(priv, (len < 0)); 1398 } 1399 1400 spin_lock_irqsave(&priv->scan_lock, flags); 1401 } 1402 spin_unlock_irqrestore(&priv->scan_lock, flags); 1403 } 1404 1405 void __orinoco_ev_info(struct net_device *dev, struct hermes *hw) 1406 { 1407 struct orinoco_private *priv = ndev_priv(dev); 1408 u16 infofid; 1409 struct { 1410 __le16 len; 1411 __le16 type; 1412 } __packed info; 1413 int len, type; 1414 int err; 1415 1416 /* This is an answer to an INQUIRE command that we did earlier, 1417 * or an information "event" generated by the card 1418 * The controller return to us a pseudo frame containing 1419 * the information in question - Jean II */ 1420 infofid = hermes_read_regn(hw, INFOFID); 1421 1422 /* Read the info frame header - don't try too hard */ 1423 err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info), 1424 infofid, 0); 1425 if (err) { 1426 printk(KERN_ERR "%s: error %d reading info frame. " 1427 "Frame dropped.\n", dev->name, err); 1428 return; 1429 } 1430 1431 len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len)); 1432 type = le16_to_cpu(info.type); 1433 1434 switch (type) { 1435 case HERMES_INQ_TALLIES: { 1436 struct hermes_tallies_frame tallies; 1437 struct iw_statistics *wstats = &priv->wstats; 1438 1439 if (len > sizeof(tallies)) { 1440 printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n", 1441 dev->name, len); 1442 len = sizeof(tallies); 1443 } 1444 1445 err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len, 1446 infofid, sizeof(info)); 1447 if (err) 1448 break; 1449 1450 /* Increment our various counters */ 1451 /* wstats->discard.nwid - no wrong BSSID stuff */ 1452 wstats->discard.code += 1453 le16_to_cpu(tallies.RxWEPUndecryptable); 1454 if (len == sizeof(tallies)) 1455 wstats->discard.code += 1456 le16_to_cpu(tallies.RxDiscards_WEPICVError) + 1457 le16_to_cpu(tallies.RxDiscards_WEPExcluded); 1458 wstats->discard.misc += 1459 le16_to_cpu(tallies.TxDiscardsWrongSA); 1460 wstats->discard.fragment += 1461 le16_to_cpu(tallies.RxMsgInBadMsgFragments); 1462 wstats->discard.retries += 1463 le16_to_cpu(tallies.TxRetryLimitExceeded); 1464 /* wstats->miss.beacon - no match */ 1465 } 1466 break; 1467 case HERMES_INQ_LINKSTATUS: { 1468 struct hermes_linkstatus linkstatus; 1469 u16 newstatus; 1470 int connected; 1471 1472 if (priv->iw_mode == NL80211_IFTYPE_MONITOR) 1473 break; 1474 1475 if (len != sizeof(linkstatus)) { 1476 printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n", 1477 dev->name, len); 1478 break; 1479 } 1480 1481 err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len, 1482 infofid, sizeof(info)); 1483 if (err) 1484 break; 1485 newstatus = le16_to_cpu(linkstatus.linkstatus); 1486 1487 /* Symbol firmware uses "out of range" to signal that 1488 * the hostscan frame can be requested. */ 1489 if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE && 1490 priv->firmware_type == FIRMWARE_TYPE_SYMBOL && 1491 priv->has_hostscan && priv->scan_request) { 1492 hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL); 1493 break; 1494 } 1495 1496 connected = (newstatus == HERMES_LINKSTATUS_CONNECTED) 1497 || (newstatus == HERMES_LINKSTATUS_AP_CHANGE) 1498 || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE); 1499 1500 if (connected) 1501 netif_carrier_on(dev); 1502 else if (!ignore_disconnect) 1503 netif_carrier_off(dev); 1504 1505 if (newstatus != priv->last_linkstatus) { 1506 priv->last_linkstatus = newstatus; 1507 print_linkstatus(dev, newstatus); 1508 /* The info frame contains only one word which is the 1509 * status (see hermes.h). The status is pretty boring 1510 * in itself, that's why we export the new BSSID... 1511 * Jean II */ 1512 schedule_work(&priv->wevent_work); 1513 } 1514 } 1515 break; 1516 case HERMES_INQ_SCAN: 1517 if (!priv->scan_request && priv->bssid_fixed && 1518 priv->firmware_type == FIRMWARE_TYPE_INTERSIL) { 1519 schedule_work(&priv->join_work); 1520 break; 1521 } 1522 /* fall through */ 1523 case HERMES_INQ_HOSTSCAN: 1524 case HERMES_INQ_HOSTSCAN_SYMBOL: { 1525 /* Result of a scanning. Contains information about 1526 * cells in the vicinity - Jean II */ 1527 unsigned char *buf; 1528 1529 /* Sanity check */ 1530 if (len > 4096) { 1531 printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n", 1532 dev->name, len); 1533 qabort_scan(priv); 1534 break; 1535 } 1536 1537 /* Allocate buffer for results */ 1538 buf = kmalloc(len, GFP_ATOMIC); 1539 if (buf == NULL) { 1540 /* No memory, so can't printk()... */ 1541 qabort_scan(priv); 1542 break; 1543 } 1544 1545 /* Read scan data */ 1546 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len, 1547 infofid, sizeof(info)); 1548 if (err) { 1549 kfree(buf); 1550 qabort_scan(priv); 1551 break; 1552 } 1553 1554 #ifdef ORINOCO_DEBUG 1555 { 1556 int i; 1557 printk(KERN_DEBUG "Scan result [%02X", buf[0]); 1558 for (i = 1; i < (len * 2); i++) 1559 printk(":%02X", buf[i]); 1560 printk("]\n"); 1561 } 1562 #endif /* ORINOCO_DEBUG */ 1563 1564 qbuf_scan(priv, buf, len, type); 1565 } 1566 break; 1567 case HERMES_INQ_CHANNELINFO: 1568 { 1569 struct agere_ext_scan_info *bss; 1570 1571 if (!priv->scan_request) { 1572 printk(KERN_DEBUG "%s: Got chaninfo without scan, " 1573 "len=%d\n", dev->name, len); 1574 break; 1575 } 1576 1577 /* An empty result indicates that the scan is complete */ 1578 if (len == 0) { 1579 qbuf_scan(priv, NULL, len, type); 1580 break; 1581 } 1582 1583 /* Sanity check */ 1584 else if (len < (offsetof(struct agere_ext_scan_info, 1585 data) + 2)) { 1586 /* Drop this result now so we don't have to 1587 * keep checking later */ 1588 printk(KERN_WARNING 1589 "%s: Ext scan results too short (%d bytes)\n", 1590 dev->name, len); 1591 break; 1592 } 1593 1594 bss = kmalloc(len, GFP_ATOMIC); 1595 if (bss == NULL) 1596 break; 1597 1598 /* Read scan data */ 1599 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len, 1600 infofid, sizeof(info)); 1601 if (err) 1602 kfree(bss); 1603 else 1604 qbuf_scan(priv, bss, len, type); 1605 1606 break; 1607 } 1608 case HERMES_INQ_SEC_STAT_AGERE: 1609 /* Security status (Agere specific) */ 1610 /* Ignore this frame for now */ 1611 if (priv->firmware_type == FIRMWARE_TYPE_AGERE) 1612 break; 1613 /* fall through */ 1614 default: 1615 printk(KERN_DEBUG "%s: Unknown information frame received: " 1616 "type 0x%04x, length %d\n", dev->name, type, len); 1617 /* We don't actually do anything about it */ 1618 break; 1619 } 1620 } 1621 EXPORT_SYMBOL(__orinoco_ev_info); 1622 1623 static void __orinoco_ev_infdrop(struct net_device *dev, struct hermes *hw) 1624 { 1625 if (net_ratelimit()) 1626 printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name); 1627 } 1628 1629 /********************************************************************/ 1630 /* Internal hardware control routines */ 1631 /********************************************************************/ 1632 1633 static int __orinoco_up(struct orinoco_private *priv) 1634 { 1635 struct net_device *dev = priv->ndev; 1636 struct hermes *hw = &priv->hw; 1637 int err; 1638 1639 netif_carrier_off(dev); /* just to make sure */ 1640 1641 err = __orinoco_commit(priv); 1642 if (err) { 1643 printk(KERN_ERR "%s: Error %d configuring card\n", 1644 dev->name, err); 1645 return err; 1646 } 1647 1648 /* Fire things up again */ 1649 hermes_set_irqmask(hw, ORINOCO_INTEN); 1650 err = hermes_enable_port(hw, 0); 1651 if (err) { 1652 printk(KERN_ERR "%s: Error %d enabling MAC port\n", 1653 dev->name, err); 1654 return err; 1655 } 1656 1657 netif_start_queue(dev); 1658 1659 return 0; 1660 } 1661 1662 static int __orinoco_down(struct orinoco_private *priv) 1663 { 1664 struct net_device *dev = priv->ndev; 1665 struct hermes *hw = &priv->hw; 1666 int err; 1667 1668 netif_stop_queue(dev); 1669 1670 if (!priv->hw_unavailable) { 1671 if (!priv->broken_disableport) { 1672 err = hermes_disable_port(hw, 0); 1673 if (err) { 1674 /* Some firmwares (e.g. Intersil 1.3.x) seem 1675 * to have problems disabling the port, oh 1676 * well, too bad. */ 1677 printk(KERN_WARNING "%s: Error %d disabling MAC port\n", 1678 dev->name, err); 1679 priv->broken_disableport = 1; 1680 } 1681 } 1682 hermes_set_irqmask(hw, 0); 1683 hermes_write_regn(hw, EVACK, 0xffff); 1684 } 1685 1686 orinoco_scan_done(priv, true); 1687 1688 /* firmware will have to reassociate */ 1689 netif_carrier_off(dev); 1690 priv->last_linkstatus = 0xffff; 1691 1692 return 0; 1693 } 1694 1695 static int orinoco_reinit_firmware(struct orinoco_private *priv) 1696 { 1697 struct hermes *hw = &priv->hw; 1698 int err; 1699 1700 err = hw->ops->init(hw); 1701 if (priv->do_fw_download && !err) { 1702 err = orinoco_download(priv); 1703 if (err) 1704 priv->do_fw_download = 0; 1705 } 1706 if (!err) 1707 err = orinoco_hw_allocate_fid(priv); 1708 1709 return err; 1710 } 1711 1712 static int 1713 __orinoco_set_multicast_list(struct net_device *dev) 1714 { 1715 struct orinoco_private *priv = ndev_priv(dev); 1716 int err = 0; 1717 int promisc, mc_count; 1718 1719 /* The Hermes doesn't seem to have an allmulti mode, so we go 1720 * into promiscuous mode and let the upper levels deal. */ 1721 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || 1722 (netdev_mc_count(dev) > MAX_MULTICAST(priv))) { 1723 promisc = 1; 1724 mc_count = 0; 1725 } else { 1726 promisc = 0; 1727 mc_count = netdev_mc_count(dev); 1728 } 1729 1730 err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc); 1731 1732 return err; 1733 } 1734 1735 /* This must be called from user context, without locks held - use 1736 * schedule_work() */ 1737 void orinoco_reset(struct work_struct *work) 1738 { 1739 struct orinoco_private *priv = 1740 container_of(work, struct orinoco_private, reset_work); 1741 struct net_device *dev = priv->ndev; 1742 struct hermes *hw = &priv->hw; 1743 int err; 1744 unsigned long flags; 1745 1746 if (orinoco_lock(priv, &flags) != 0) 1747 /* When the hardware becomes available again, whatever 1748 * detects that is responsible for re-initializing 1749 * it. So no need for anything further */ 1750 return; 1751 1752 netif_stop_queue(dev); 1753 1754 /* Shut off interrupts. Depending on what state the hardware 1755 * is in, this might not work, but we'll try anyway */ 1756 hermes_set_irqmask(hw, 0); 1757 hermes_write_regn(hw, EVACK, 0xffff); 1758 1759 priv->hw_unavailable++; 1760 priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */ 1761 netif_carrier_off(dev); 1762 1763 orinoco_unlock(priv, &flags); 1764 1765 /* Scanning support: Notify scan cancellation */ 1766 orinoco_scan_done(priv, true); 1767 1768 if (priv->hard_reset) { 1769 err = (*priv->hard_reset)(priv); 1770 if (err) { 1771 printk(KERN_ERR "%s: orinoco_reset: Error %d " 1772 "performing hard reset\n", dev->name, err); 1773 goto disable; 1774 } 1775 } 1776 1777 err = orinoco_reinit_firmware(priv); 1778 if (err) { 1779 printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n", 1780 dev->name, err); 1781 goto disable; 1782 } 1783 1784 /* This has to be called from user context */ 1785 orinoco_lock_irq(priv); 1786 1787 priv->hw_unavailable--; 1788 1789 /* priv->open or priv->hw_unavailable might have changed while 1790 * we dropped the lock */ 1791 if (priv->open && (!priv->hw_unavailable)) { 1792 err = __orinoco_up(priv); 1793 if (err) { 1794 printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n", 1795 dev->name, err); 1796 } else 1797 netif_trans_update(dev); 1798 } 1799 1800 orinoco_unlock_irq(priv); 1801 1802 return; 1803 disable: 1804 hermes_set_irqmask(hw, 0); 1805 netif_device_detach(dev); 1806 printk(KERN_ERR "%s: Device has been disabled!\n", dev->name); 1807 } 1808 1809 static int __orinoco_commit(struct orinoco_private *priv) 1810 { 1811 struct net_device *dev = priv->ndev; 1812 int err = 0; 1813 1814 /* If we've called commit, we are reconfiguring or bringing the 1815 * interface up. Maintaining countermeasures across this would 1816 * be confusing, so note that we've disabled them. The port will 1817 * be enabled later in orinoco_commit or __orinoco_up. */ 1818 priv->tkip_cm_active = 0; 1819 1820 err = orinoco_hw_program_rids(priv); 1821 1822 /* FIXME: what about netif_tx_lock */ 1823 (void) __orinoco_set_multicast_list(dev); 1824 1825 return err; 1826 } 1827 1828 /* Ensures configuration changes are applied. May result in a reset. 1829 * The caller should hold priv->lock 1830 */ 1831 int orinoco_commit(struct orinoco_private *priv) 1832 { 1833 struct net_device *dev = priv->ndev; 1834 struct hermes *hw = &priv->hw; 1835 int err; 1836 1837 if (priv->broken_disableport) { 1838 schedule_work(&priv->reset_work); 1839 return 0; 1840 } 1841 1842 err = hermes_disable_port(hw, 0); 1843 if (err) { 1844 printk(KERN_WARNING "%s: Unable to disable port " 1845 "while reconfiguring card\n", dev->name); 1846 priv->broken_disableport = 1; 1847 goto out; 1848 } 1849 1850 err = __orinoco_commit(priv); 1851 if (err) { 1852 printk(KERN_WARNING "%s: Unable to reconfigure card\n", 1853 dev->name); 1854 goto out; 1855 } 1856 1857 err = hermes_enable_port(hw, 0); 1858 if (err) { 1859 printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n", 1860 dev->name); 1861 goto out; 1862 } 1863 1864 out: 1865 if (err) { 1866 printk(KERN_WARNING "%s: Resetting instead...\n", dev->name); 1867 schedule_work(&priv->reset_work); 1868 err = 0; 1869 } 1870 return err; 1871 } 1872 1873 /********************************************************************/ 1874 /* Interrupt handler */ 1875 /********************************************************************/ 1876 1877 static void __orinoco_ev_tick(struct net_device *dev, struct hermes *hw) 1878 { 1879 printk(KERN_DEBUG "%s: TICK\n", dev->name); 1880 } 1881 1882 static void __orinoco_ev_wterr(struct net_device *dev, struct hermes *hw) 1883 { 1884 /* This seems to happen a fair bit under load, but ignoring it 1885 seems to work fine...*/ 1886 printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n", 1887 dev->name); 1888 } 1889 1890 irqreturn_t orinoco_interrupt(int irq, void *dev_id) 1891 { 1892 struct orinoco_private *priv = dev_id; 1893 struct net_device *dev = priv->ndev; 1894 struct hermes *hw = &priv->hw; 1895 int count = MAX_IRQLOOPS_PER_IRQ; 1896 u16 evstat, events; 1897 /* These are used to detect a runaway interrupt situation. 1898 * 1899 * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy, 1900 * we panic and shut down the hardware 1901 */ 1902 /* jiffies value the last time we were called */ 1903 static int last_irq_jiffy; /* = 0 */ 1904 static int loops_this_jiffy; /* = 0 */ 1905 unsigned long flags; 1906 1907 if (orinoco_lock(priv, &flags) != 0) { 1908 /* If hw is unavailable - we don't know if the irq was 1909 * for us or not */ 1910 return IRQ_HANDLED; 1911 } 1912 1913 evstat = hermes_read_regn(hw, EVSTAT); 1914 events = evstat & hw->inten; 1915 if (!events) { 1916 orinoco_unlock(priv, &flags); 1917 return IRQ_NONE; 1918 } 1919 1920 if (jiffies != last_irq_jiffy) 1921 loops_this_jiffy = 0; 1922 last_irq_jiffy = jiffies; 1923 1924 while (events && count--) { 1925 if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) { 1926 printk(KERN_WARNING "%s: IRQ handler is looping too " 1927 "much! Resetting.\n", dev->name); 1928 /* Disable interrupts for now */ 1929 hermes_set_irqmask(hw, 0); 1930 schedule_work(&priv->reset_work); 1931 break; 1932 } 1933 1934 /* Check the card hasn't been removed */ 1935 if (!hermes_present(hw)) { 1936 DEBUG(0, "orinoco_interrupt(): card removed\n"); 1937 break; 1938 } 1939 1940 if (events & HERMES_EV_TICK) 1941 __orinoco_ev_tick(dev, hw); 1942 if (events & HERMES_EV_WTERR) 1943 __orinoco_ev_wterr(dev, hw); 1944 if (events & HERMES_EV_INFDROP) 1945 __orinoco_ev_infdrop(dev, hw); 1946 if (events & HERMES_EV_INFO) 1947 __orinoco_ev_info(dev, hw); 1948 if (events & HERMES_EV_RX) 1949 __orinoco_ev_rx(dev, hw); 1950 if (events & HERMES_EV_TXEXC) 1951 __orinoco_ev_txexc(dev, hw); 1952 if (events & HERMES_EV_TX) 1953 __orinoco_ev_tx(dev, hw); 1954 if (events & HERMES_EV_ALLOC) 1955 __orinoco_ev_alloc(dev, hw); 1956 1957 hermes_write_regn(hw, EVACK, evstat); 1958 1959 evstat = hermes_read_regn(hw, EVSTAT); 1960 events = evstat & hw->inten; 1961 } 1962 1963 orinoco_unlock(priv, &flags); 1964 return IRQ_HANDLED; 1965 } 1966 EXPORT_SYMBOL(orinoco_interrupt); 1967 1968 /********************************************************************/ 1969 /* Power management */ 1970 /********************************************************************/ 1971 #if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT) 1972 static int orinoco_pm_notifier(struct notifier_block *notifier, 1973 unsigned long pm_event, 1974 void *unused) 1975 { 1976 struct orinoco_private *priv = container_of(notifier, 1977 struct orinoco_private, 1978 pm_notifier); 1979 1980 /* All we need to do is cache the firmware before suspend, and 1981 * release it when we come out. 1982 * 1983 * Only need to do this if we're downloading firmware. */ 1984 if (!priv->do_fw_download) 1985 return NOTIFY_DONE; 1986 1987 switch (pm_event) { 1988 case PM_HIBERNATION_PREPARE: 1989 case PM_SUSPEND_PREPARE: 1990 orinoco_cache_fw(priv, 0); 1991 break; 1992 1993 case PM_POST_RESTORE: 1994 /* Restore from hibernation failed. We need to clean 1995 * up in exactly the same way, so fall through. */ 1996 case PM_POST_HIBERNATION: 1997 case PM_POST_SUSPEND: 1998 orinoco_uncache_fw(priv); 1999 break; 2000 2001 case PM_RESTORE_PREPARE: 2002 default: 2003 break; 2004 } 2005 2006 return NOTIFY_DONE; 2007 } 2008 2009 static void orinoco_register_pm_notifier(struct orinoco_private *priv) 2010 { 2011 priv->pm_notifier.notifier_call = orinoco_pm_notifier; 2012 register_pm_notifier(&priv->pm_notifier); 2013 } 2014 2015 static void orinoco_unregister_pm_notifier(struct orinoco_private *priv) 2016 { 2017 unregister_pm_notifier(&priv->pm_notifier); 2018 } 2019 #else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */ 2020 #define orinoco_register_pm_notifier(priv) do { } while (0) 2021 #define orinoco_unregister_pm_notifier(priv) do { } while (0) 2022 #endif 2023 2024 /********************************************************************/ 2025 /* Initialization */ 2026 /********************************************************************/ 2027 2028 int orinoco_init(struct orinoco_private *priv) 2029 { 2030 struct device *dev = priv->dev; 2031 struct wiphy *wiphy = priv_to_wiphy(priv); 2032 struct hermes *hw = &priv->hw; 2033 int err = 0; 2034 2035 /* No need to lock, the hw_unavailable flag is already set in 2036 * alloc_orinocodev() */ 2037 priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN; 2038 2039 /* Initialize the firmware */ 2040 err = hw->ops->init(hw); 2041 if (err != 0) { 2042 dev_err(dev, "Failed to initialize firmware (err = %d)\n", 2043 err); 2044 goto out; 2045 } 2046 2047 err = determine_fw_capabilities(priv, wiphy->fw_version, 2048 sizeof(wiphy->fw_version), 2049 &wiphy->hw_version); 2050 if (err != 0) { 2051 dev_err(dev, "Incompatible firmware, aborting\n"); 2052 goto out; 2053 } 2054 2055 if (priv->do_fw_download) { 2056 #ifdef CONFIG_HERMES_CACHE_FW_ON_INIT 2057 orinoco_cache_fw(priv, 0); 2058 #endif 2059 2060 err = orinoco_download(priv); 2061 if (err) 2062 priv->do_fw_download = 0; 2063 2064 /* Check firmware version again */ 2065 err = determine_fw_capabilities(priv, wiphy->fw_version, 2066 sizeof(wiphy->fw_version), 2067 &wiphy->hw_version); 2068 if (err != 0) { 2069 dev_err(dev, "Incompatible firmware, aborting\n"); 2070 goto out; 2071 } 2072 } 2073 2074 if (priv->has_port3) 2075 dev_info(dev, "Ad-hoc demo mode supported\n"); 2076 if (priv->has_ibss) 2077 dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n"); 2078 if (priv->has_wep) 2079 dev_info(dev, "WEP supported, %s-bit key\n", 2080 priv->has_big_wep ? "104" : "40"); 2081 if (priv->has_wpa) { 2082 dev_info(dev, "WPA-PSK supported\n"); 2083 if (orinoco_mic_init(priv)) { 2084 dev_err(dev, "Failed to setup MIC crypto algorithm. " 2085 "Disabling WPA support\n"); 2086 priv->has_wpa = 0; 2087 } 2088 } 2089 2090 err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr); 2091 if (err) 2092 goto out; 2093 2094 err = orinoco_hw_allocate_fid(priv); 2095 if (err) { 2096 dev_err(dev, "Failed to allocate NIC buffer!\n"); 2097 goto out; 2098 } 2099 2100 /* Set up the default configuration */ 2101 priv->iw_mode = NL80211_IFTYPE_STATION; 2102 /* By default use IEEE/IBSS ad-hoc mode if we have it */ 2103 priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss); 2104 set_port_type(priv); 2105 priv->channel = 0; /* use firmware default */ 2106 2107 priv->promiscuous = 0; 2108 priv->encode_alg = ORINOCO_ALG_NONE; 2109 priv->tx_key = 0; 2110 priv->wpa_enabled = 0; 2111 priv->tkip_cm_active = 0; 2112 priv->key_mgmt = 0; 2113 priv->wpa_ie_len = 0; 2114 priv->wpa_ie = NULL; 2115 2116 if (orinoco_wiphy_register(wiphy)) { 2117 err = -ENODEV; 2118 goto out; 2119 } 2120 2121 /* Make the hardware available, as long as it hasn't been 2122 * removed elsewhere (e.g. by PCMCIA hot unplug) */ 2123 orinoco_lock_irq(priv); 2124 priv->hw_unavailable--; 2125 orinoco_unlock_irq(priv); 2126 2127 dev_dbg(dev, "Ready\n"); 2128 2129 out: 2130 return err; 2131 } 2132 EXPORT_SYMBOL(orinoco_init); 2133 2134 static const struct net_device_ops orinoco_netdev_ops = { 2135 .ndo_open = orinoco_open, 2136 .ndo_stop = orinoco_stop, 2137 .ndo_start_xmit = orinoco_xmit, 2138 .ndo_set_rx_mode = orinoco_set_multicast_list, 2139 .ndo_change_mtu = orinoco_change_mtu, 2140 .ndo_set_mac_address = eth_mac_addr, 2141 .ndo_validate_addr = eth_validate_addr, 2142 .ndo_tx_timeout = orinoco_tx_timeout, 2143 .ndo_get_stats = orinoco_get_stats, 2144 }; 2145 2146 /* Allocate private data. 2147 * 2148 * This driver has a number of structures associated with it 2149 * netdev - Net device structure for each network interface 2150 * wiphy - structure associated with wireless phy 2151 * wireless_dev (wdev) - structure for each wireless interface 2152 * hw - structure for hermes chip info 2153 * card - card specific structure for use by the card driver 2154 * (airport, orinoco_cs) 2155 * priv - orinoco private data 2156 * device - generic linux device structure 2157 * 2158 * +---------+ +---------+ 2159 * | wiphy | | netdev | 2160 * | +-------+ | +-------+ 2161 * | | priv | | | wdev | 2162 * | | +-----+ +-+-------+ 2163 * | | | hw | 2164 * | +-+-----+ 2165 * | | card | 2166 * +-+-------+ 2167 * 2168 * priv has a link to netdev and device 2169 * wdev has a link to wiphy 2170 */ 2171 struct orinoco_private 2172 *alloc_orinocodev(int sizeof_card, 2173 struct device *device, 2174 int (*hard_reset)(struct orinoco_private *), 2175 int (*stop_fw)(struct orinoco_private *, int)) 2176 { 2177 struct orinoco_private *priv; 2178 struct wiphy *wiphy; 2179 2180 /* allocate wiphy 2181 * NOTE: We only support a single virtual interface 2182 * but this may change when monitor mode is added 2183 */ 2184 wiphy = wiphy_new(&orinoco_cfg_ops, 2185 sizeof(struct orinoco_private) + sizeof_card); 2186 if (!wiphy) 2187 return NULL; 2188 2189 priv = wiphy_priv(wiphy); 2190 priv->dev = device; 2191 2192 if (sizeof_card) 2193 priv->card = (void *)((unsigned long)priv 2194 + sizeof(struct orinoco_private)); 2195 else 2196 priv->card = NULL; 2197 2198 orinoco_wiphy_init(wiphy); 2199 2200 #ifdef WIRELESS_SPY 2201 priv->wireless_data.spy_data = &priv->spy_data; 2202 #endif 2203 2204 /* Set up default callbacks */ 2205 priv->hard_reset = hard_reset; 2206 priv->stop_fw = stop_fw; 2207 2208 spin_lock_init(&priv->lock); 2209 priv->open = 0; 2210 priv->hw_unavailable = 1; /* orinoco_init() must clear this 2211 * before anything else touches the 2212 * hardware */ 2213 INIT_WORK(&priv->reset_work, orinoco_reset); 2214 INIT_WORK(&priv->join_work, orinoco_join_ap); 2215 INIT_WORK(&priv->wevent_work, orinoco_send_wevents); 2216 2217 INIT_LIST_HEAD(&priv->rx_list); 2218 tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet, 2219 (unsigned long) priv); 2220 2221 spin_lock_init(&priv->scan_lock); 2222 INIT_LIST_HEAD(&priv->scan_list); 2223 INIT_WORK(&priv->process_scan, orinoco_process_scan_results); 2224 2225 priv->last_linkstatus = 0xffff; 2226 2227 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP) 2228 priv->cached_pri_fw = NULL; 2229 priv->cached_fw = NULL; 2230 #endif 2231 2232 /* Register PM notifiers */ 2233 orinoco_register_pm_notifier(priv); 2234 2235 return priv; 2236 } 2237 EXPORT_SYMBOL(alloc_orinocodev); 2238 2239 /* We can only support a single interface. We provide a separate 2240 * function to set it up to distinguish between hardware 2241 * initialisation and interface setup. 2242 * 2243 * The base_addr and irq parameters are passed on to netdev for use 2244 * with SIOCGIFMAP. 2245 */ 2246 int orinoco_if_add(struct orinoco_private *priv, 2247 unsigned long base_addr, 2248 unsigned int irq, 2249 const struct net_device_ops *ops) 2250 { 2251 struct wiphy *wiphy = priv_to_wiphy(priv); 2252 struct wireless_dev *wdev; 2253 struct net_device *dev; 2254 int ret; 2255 2256 dev = alloc_etherdev(sizeof(struct wireless_dev)); 2257 2258 if (!dev) 2259 return -ENOMEM; 2260 2261 /* Initialise wireless_dev */ 2262 wdev = netdev_priv(dev); 2263 wdev->wiphy = wiphy; 2264 wdev->iftype = NL80211_IFTYPE_STATION; 2265 2266 /* Setup / override net_device fields */ 2267 dev->ieee80211_ptr = wdev; 2268 dev->watchdog_timeo = HZ; /* 1 second timeout */ 2269 dev->wireless_handlers = &orinoco_handler_def; 2270 #ifdef WIRELESS_SPY 2271 dev->wireless_data = &priv->wireless_data; 2272 #endif 2273 /* Default to standard ops if not set */ 2274 if (ops) 2275 dev->netdev_ops = ops; 2276 else 2277 dev->netdev_ops = &orinoco_netdev_ops; 2278 2279 /* we use the default eth_mac_addr for setting the MAC addr */ 2280 2281 /* Reserve space in skb for the SNAP header */ 2282 dev->needed_headroom = ENCAPS_OVERHEAD; 2283 2284 netif_carrier_off(dev); 2285 2286 memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN); 2287 2288 dev->base_addr = base_addr; 2289 dev->irq = irq; 2290 2291 SET_NETDEV_DEV(dev, priv->dev); 2292 ret = register_netdev(dev); 2293 if (ret) 2294 goto fail; 2295 2296 priv->ndev = dev; 2297 2298 /* Report what we've done */ 2299 dev_dbg(priv->dev, "Registerred interface %s.\n", dev->name); 2300 2301 return 0; 2302 2303 fail: 2304 free_netdev(dev); 2305 return ret; 2306 } 2307 EXPORT_SYMBOL(orinoco_if_add); 2308 2309 void orinoco_if_del(struct orinoco_private *priv) 2310 { 2311 struct net_device *dev = priv->ndev; 2312 2313 unregister_netdev(dev); 2314 free_netdev(dev); 2315 } 2316 EXPORT_SYMBOL(orinoco_if_del); 2317 2318 void free_orinocodev(struct orinoco_private *priv) 2319 { 2320 struct wiphy *wiphy = priv_to_wiphy(priv); 2321 struct orinoco_rx_data *rx_data, *temp; 2322 struct orinoco_scan_data *sd, *sdtemp; 2323 2324 /* If the tasklet is scheduled when we call tasklet_kill it 2325 * will run one final time. However the tasklet will only 2326 * drain priv->rx_list if the hw is still available. */ 2327 tasklet_kill(&priv->rx_tasklet); 2328 2329 /* Explicitly drain priv->rx_list */ 2330 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) { 2331 list_del(&rx_data->list); 2332 2333 dev_kfree_skb(rx_data->skb); 2334 kfree(rx_data->desc); 2335 kfree(rx_data); 2336 } 2337 2338 cancel_work_sync(&priv->process_scan); 2339 /* Explicitly drain priv->scan_list */ 2340 list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) { 2341 list_del(&sd->list); 2342 2343 if (sd->len > 0) 2344 kfree(sd->buf); 2345 kfree(sd); 2346 } 2347 2348 orinoco_unregister_pm_notifier(priv); 2349 orinoco_uncache_fw(priv); 2350 2351 priv->wpa_ie_len = 0; 2352 kfree(priv->wpa_ie); 2353 orinoco_mic_free(priv); 2354 wiphy_free(wiphy); 2355 } 2356 EXPORT_SYMBOL(free_orinocodev); 2357 2358 int orinoco_up(struct orinoco_private *priv) 2359 { 2360 struct net_device *dev = priv->ndev; 2361 unsigned long flags; 2362 int err; 2363 2364 priv->hw.ops->lock_irqsave(&priv->lock, &flags); 2365 2366 err = orinoco_reinit_firmware(priv); 2367 if (err) { 2368 printk(KERN_ERR "%s: Error %d re-initializing firmware\n", 2369 dev->name, err); 2370 goto exit; 2371 } 2372 2373 netif_device_attach(dev); 2374 priv->hw_unavailable--; 2375 2376 if (priv->open && !priv->hw_unavailable) { 2377 err = __orinoco_up(priv); 2378 if (err) 2379 printk(KERN_ERR "%s: Error %d restarting card\n", 2380 dev->name, err); 2381 } 2382 2383 exit: 2384 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); 2385 2386 return 0; 2387 } 2388 EXPORT_SYMBOL(orinoco_up); 2389 2390 void orinoco_down(struct orinoco_private *priv) 2391 { 2392 struct net_device *dev = priv->ndev; 2393 unsigned long flags; 2394 int err; 2395 2396 priv->hw.ops->lock_irqsave(&priv->lock, &flags); 2397 err = __orinoco_down(priv); 2398 if (err) 2399 printk(KERN_WARNING "%s: Error %d downing interface\n", 2400 dev->name, err); 2401 2402 netif_device_detach(dev); 2403 priv->hw_unavailable++; 2404 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); 2405 } 2406 EXPORT_SYMBOL(orinoco_down); 2407 2408 /********************************************************************/ 2409 /* Module initialization */ 2410 /********************************************************************/ 2411 2412 /* Can't be declared "const" or the whole __initdata section will 2413 * become const */ 2414 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION 2415 " (David Gibson <hermes@gibson.dropbear.id.au>, " 2416 "Pavel Roskin <proski@gnu.org>, et al)"; 2417 2418 static int __init init_orinoco(void) 2419 { 2420 printk(KERN_DEBUG "%s\n", version); 2421 return 0; 2422 } 2423 2424 static void __exit exit_orinoco(void) 2425 { 2426 } 2427 2428 module_init(init_orinoco); 2429 module_exit(exit_orinoco); 2430