orinoco.c 120 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
/* orinoco.c - (formerly known as dldwd_cs.c and orinoco_cs.c)
 *
 * A driver for Hermes or Prism 2 chipset based PCMCIA wireless
 * adaptors, with Lucent/Agere, Intersil or Symbol firmware.
 *
 * Current maintainers (as of 29 September 2003) are:
 * 	Pavel Roskin <proski AT gnu.org>
 * and	David Gibson <hermes AT gibson.dropbear.id.au>
 *
 * (C) Copyright David Gibson, IBM Corporation 2001-2003.
 * Copyright (C) 2000 David Gibson, Linuxcare Australia.
 *	With some help from :
 * Copyright (C) 2001 Jean Tourrilhes, HP Labs
 * Copyright (C) 2001 Benjamin Herrenschmidt
 *
 * Based on dummy_cs.c 1.27 2000/06/12 21:27:25
 *
 * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy
 * AT fasta.fh-dortmund.de>
 *      http://www.stud.fh-dortmund.de/~andy/wvlan/
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * The initial developer of the original code is David A. Hinds
 * <dahinds AT users.sourceforge.net>.  Portions created by David
 * A. Hinds are Copyright (C) 1999 David A. Hinds.  All Rights
 * Reserved.
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License version 2 (the "GPL"), in
 * which case the provisions of the GPL are applicable instead of the
 * above.  If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the GPL.  If you do not delete the
 * provisions above, a recipient may use your version of this file
 * under either the MPL or the GPL.  */

/*
 * TODO
 *	o Handle de-encapsulation within network layer, provide 802.11
 *	  headers (patch from Thomas 'Dent' Mirlacher)
 *	o Fix possible races in SPY handling.
 *	o Disconnect wireless extensions from fundamental configuration.
 *	o (maybe) Software WEP support (patch from Stano Meduna).
 *	o (maybe) Use multiple Tx buffers - driver handling queue
 *	  rather than firmware.
 */

/* Locking and synchronization:
 *
 * The basic principle is that everything is serialized through a
 * single spinlock, priv->lock.  The lock is used in user, bh and irq
 * context, so when taken outside hardirq context it should always be
 * taken with interrupts disabled.  The lock protects both the
 * hardware and the struct orinoco_private.
 *
 * Another flag, priv->hw_unavailable indicates that the hardware is
 * unavailable for an extended period of time (e.g. suspended, or in
 * the middle of a hard reset).  This flag is protected by the
 * spinlock.  All code which touches the hardware should check the
 * flag after taking the lock, and if it is set, give up on whatever
 * they are doing and drop the lock again.  The orinoco_lock()
 * function handles this (it unlocks and returns -EBUSY if
 * hw_unavailable is non-zero).
 */

#define DRIVER_NAME "orinoco"

#include <linux/config.h>

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
92
#include <linux/ethtool.h>
Linus Torvalds's avatar
Linus Torvalds committed
93
#include <linux/wireless.h>
94
#include <net/iw_handler.h>
95
#include <net/ieee80211.h>
Linus Torvalds's avatar
Linus Torvalds committed
96

Jeff Garzik's avatar
Jeff Garzik committed
97 98
#include <net/ieee80211.h>

Linus Torvalds's avatar
Linus Torvalds committed
99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>

#include "hermes.h"
#include "hermes_rid.h"
#include "orinoco.h"

/********************************************************************/
/* Module information                                               */
/********************************************************************/

MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & David Gibson <hermes@gibson.dropbear.id.au>");
MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based and similar wireless cards");
MODULE_LICENSE("Dual MPL/GPL");

/* Level of debugging. Used in the macros in orinoco.h */
#ifdef ORINOCO_DEBUG
int orinoco_debug = ORINOCO_DEBUG;
module_param(orinoco_debug, int, 0644);
MODULE_PARM_DESC(orinoco_debug, "Debug level");
EXPORT_SYMBOL(orinoco_debug);
#endif

static int suppress_linkstatus; /* = 0 */
module_param(suppress_linkstatus, bool, 0644);
MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
126 127 128
static int ignore_disconnect; /* = 0 */
module_param(ignore_disconnect, int, 0644);
MODULE_PARM_DESC(ignore_disconnect, "Don't report lost link to the network layer");
Linus Torvalds's avatar
Linus Torvalds committed
129

130 131 132 133
static int force_monitor; /* = 0 */
module_param(force_monitor, int, 0644);
MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");

Linus Torvalds's avatar
Linus Torvalds committed
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
/********************************************************************/
/* Compile time configuration and compatibility stuff               */
/********************************************************************/

/* We do this this way to avoid ifdefs in the actual code */
#ifdef WIRELESS_SPY
#define SPY_NUMBER(priv)	(priv->spy_number)
#else
#define SPY_NUMBER(priv)	0
#endif /* WIRELESS_SPY */

/********************************************************************/
/* Internal constants                                               */
/********************************************************************/

149 150 151 152
/* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
#define ENCAPS_OVERHEAD		(sizeof(encaps_hdr) + 2)

Linus Torvalds's avatar
Linus Torvalds committed
153
#define ORINOCO_MIN_MTU		256
Jeff Garzik's avatar
Jeff Garzik committed
154
#define ORINOCO_MAX_MTU		(IEEE80211_DATA_LEN - ENCAPS_OVERHEAD)
Linus Torvalds's avatar
Linus Torvalds committed
155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178

#define SYMBOL_MAX_VER_LEN	(14)
#define USER_BAP		0
#define IRQ_BAP			1
#define MAX_IRQLOOPS_PER_IRQ	10
#define MAX_IRQLOOPS_PER_JIFFY	(20000/HZ) /* Based on a guestimate of
					    * how many events the
					    * device could
					    * legitimately generate */
#define SMALL_KEY_SIZE		5
#define LARGE_KEY_SIZE		13
#define TX_NICBUF_SIZE_BUG	1585		/* Bug in Symbol firmware */

#define DUMMY_FID		0xFFFF

/*#define MAX_MULTICAST(priv)	(priv->firmware_type == FIRMWARE_TYPE_AGERE ? \
  HERMES_MAX_MULTICAST : 0)*/
#define MAX_MULTICAST(priv)	(HERMES_MAX_MULTICAST)

#define ORINOCO_INTEN	 	(HERMES_EV_RX | HERMES_EV_ALLOC \
				 | HERMES_EV_TX | HERMES_EV_TXEXC \
				 | HERMES_EV_WTERR | HERMES_EV_INFO \
				 | HERMES_EV_INFDROP )

179 180 181
#define MAX_RID_LEN 1024

static const struct iw_handler_def orinoco_handler_def;
182
static struct ethtool_ops orinoco_ethtool_ops;
183

Linus Torvalds's avatar
Linus Torvalds committed
184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
/********************************************************************/
/* Data tables                                                      */
/********************************************************************/

/* The frequency of each channel in MHz */
static const long channel_frequency[] = {
	2412, 2417, 2422, 2427, 2432, 2437, 2442,
	2447, 2452, 2457, 2462, 2467, 2472, 2484
};
#define NUM_CHANNELS ARRAY_SIZE(channel_frequency)

/* This tables gives the actual meanings of the bitrate IDs returned
 * by the firmware. */
static struct {
	int bitrate; /* in 100s of kilobits */
	int automatic;
	u16 agere_txratectrl;
	u16 intersil_txratectrl;
} bitrate_table[] = {
	{110, 1,  3, 15}, /* Entry 0 is the default */
	{10,  0,  1,  1},
	{10,  1,  1,  1},
	{20,  0,  2,  2},
	{20,  1,  6,  3},
	{55,  0,  4,  4},
	{55,  1,  7,  7},
	{110, 0,  5,  8},
};
#define BITRATE_TABLE_SIZE ARRAY_SIZE(bitrate_table)

/********************************************************************/
/* Data types                                                       */
/********************************************************************/

218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
/* Used in Event handling.
 * We avoid nested structres as they break on ARM -- Moustafa */
struct hermes_tx_descriptor_802_11 {
	/* hermes_tx_descriptor */
	u16 status;
	u16 reserved1;
	u16 reserved2;
	u32 sw_support;
	u8 retry_count;
	u8 tx_rate;
	u16 tx_control;

	/* ieee802_11_hdr */
	u16 frame_ctl;
	u16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	u16 seq_ctl;
	u8 addr4[ETH_ALEN];
	u16 data_len;

	/* ethhdr */
	unsigned char   h_dest[ETH_ALEN];       /* destination eth addr */
	unsigned char   h_source[ETH_ALEN];     /* source ether addr    */
	unsigned short  h_proto;                /* packet type ID field */

	/* p8022_hdr */
Linus Torvalds's avatar
Linus Torvalds committed
246 247 248 249
	u8 dsap;
	u8 ssap;
	u8 ctrl;
	u8 oui[3];
250

Linus Torvalds's avatar
Linus Torvalds committed
251 252 253
	u16 ethertype;
} __attribute__ ((packed));

254
/* Rx frame header except compatibility 802.3 header */
Linus Torvalds's avatar
Linus Torvalds committed
255
struct hermes_rx_descriptor {
256
	/* Control */
Linus Torvalds's avatar
Linus Torvalds committed
257 258 259 260 261 262 263
	u16 status;
	u32 time;
	u8 silence;
	u8 signal;
	u8 rate;
	u8 rxflow;
	u32 reserved;
264 265 266 267 268 269 270 271 272 273 274 275

	/* 802.11 header */
	u16 frame_ctl;
	u16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	u16 seq_ctl;
	u8 addr4[ETH_ALEN];

	/* Data length */
	u16 data_len;
Linus Torvalds's avatar
Linus Torvalds committed
276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304
} __attribute__ ((packed));

/********************************************************************/
/* Function prototypes                                              */
/********************************************************************/

static int __orinoco_program_rids(struct net_device *dev);
static void __orinoco_set_multicast_list(struct net_device *dev);

/********************************************************************/
/* Internal helper functions                                        */
/********************************************************************/

static inline void set_port_type(struct orinoco_private *priv)
{
	switch (priv->iw_mode) {
	case IW_MODE_INFRA:
		priv->port_type = 1;
		priv->createibss = 0;
		break;
	case IW_MODE_ADHOC:
		if (priv->prefer_port3) {
			priv->port_type = 3;
			priv->createibss = 0;
		} else {
			priv->port_type = priv->ibss_port;
			priv->createibss = 1;
		}
		break;
305 306 307 308
	case IW_MODE_MONITOR:
		priv->port_type = 3;
		priv->createibss = 0;
		break;
Linus Torvalds's avatar
Linus Torvalds committed
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
	default:
		printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
		       priv->ndev->name);
	}
}

/********************************************************************/
/* Device methods                                                   */
/********************************************************************/

static int orinoco_open(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	unsigned long flags;
	int err;

	if (orinoco_lock(priv, &flags) != 0)
		return -EBUSY;

	err = __orinoco_up(dev);

	if (! err)
		priv->open = 1;

	orinoco_unlock(priv, &flags);

	return err;
}

338
static int orinoco_stop(struct net_device *dev)
Linus Torvalds's avatar
Linus Torvalds committed
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368
{
	struct orinoco_private *priv = netdev_priv(dev);
	int err = 0;

	/* We mustn't use orinoco_lock() here, because we need to be
	   able to close the interface even if hw_unavailable is set
	   (e.g. as we're released after a PC Card removal) */
	spin_lock_irq(&priv->lock);

	priv->open = 0;

	err = __orinoco_down(dev);

	spin_unlock_irq(&priv->lock);

	return err;
}

static struct net_device_stats *orinoco_get_stats(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	
	return &priv->stats;
}

static struct iw_statistics *orinoco_get_wireless_stats(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	hermes_t *hw = &priv->hw;
	struct iw_statistics *wstats = &priv->wstats;
369
	int err;
Linus Torvalds's avatar
Linus Torvalds committed
370 371 372 373 374 375 376 377
	unsigned long flags;

	if (! netif_device_present(dev)) {
		printk(KERN_WARNING "%s: get_wireless_stats() called while device not present\n",
		       dev->name);
		return NULL; /* FIXME: Can we do better than this? */
	}

378 379
	/* If busy, return the old stats.  Returning NULL may cause
	 * the interface to disappear from /proc/net/wireless */
Linus Torvalds's avatar
Linus Torvalds committed
380
	if (orinoco_lock(priv, &flags) != 0)
381 382 383 384 385 386 387 388 389 390 391 392
		return wstats;

	/* We can't really wait for the tallies inquiry command to
	 * complete, so we just use the previous results and trigger
	 * a new tallies inquiry command for next time - Jean II */
	/* FIXME: Really we should wait for the inquiry to come back -
	 * as it is the stats we give don't make a whole lot of sense.
	 * Unfortunately, it's not clear how to do that within the
	 * wireless extensions framework: I think we're in user
	 * context, but a lock seems to be held by the time we get in
	 * here so we're not safe to sleep here. */
	hermes_inquire(hw, HERMES_INQ_TALLIES);
Linus Torvalds's avatar
Linus Torvalds committed
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410

	if (priv->iw_mode == IW_MODE_ADHOC) {
		memset(&wstats->qual, 0, sizeof(wstats->qual));
		/* If a spy address is defined, we report stats of the
		 * first spy address - Jean II */
		if (SPY_NUMBER(priv)) {
			wstats->qual.qual = priv->spy_stat[0].qual;
			wstats->qual.level = priv->spy_stat[0].level;
			wstats->qual.noise = priv->spy_stat[0].noise;
			wstats->qual.updated = priv->spy_stat[0].updated;
		}
	} else {
		struct {
			u16 qual, signal, noise;
		} __attribute__ ((packed)) cq;

		err = HERMES_READ_RECORD(hw, USER_BAP,
					 HERMES_RID_COMMSQUALITY, &cq);
411 412 413 414 415 416 417

		if (!err) {
			wstats->qual.qual = (int)le16_to_cpu(cq.qual);
			wstats->qual.level = (int)le16_to_cpu(cq.signal) - 0x95;
			wstats->qual.noise = (int)le16_to_cpu(cq.noise) - 0x95;
			wstats->qual.updated = 7;
		}
Linus Torvalds's avatar
Linus Torvalds committed
418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445
	}

	orinoco_unlock(priv, &flags);
	return wstats;
}

static void orinoco_set_multicast_list(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	unsigned long flags;

	if (orinoco_lock(priv, &flags) != 0) {
		printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
		       "called when hw_unavailable\n", dev->name);
		return;
	}

	__orinoco_set_multicast_list(dev);
	orinoco_unlock(priv, &flags);
}

static int orinoco_change_mtu(struct net_device *dev, int new_mtu)
{
	struct orinoco_private *priv = netdev_priv(dev);

	if ( (new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU) )
		return -EINVAL;

Jeff Garzik's avatar
Jeff Garzik committed
446
	if ( (new_mtu + ENCAPS_OVERHEAD + IEEE80211_HLEN) >
Linus Torvalds's avatar
Linus Torvalds committed
447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
	     (priv->nicbuf_size - ETH_HLEN) )
		return -EINVAL;

	dev->mtu = new_mtu;

	return 0;
}

/********************************************************************/
/* Tx path                                                          */
/********************************************************************/

static int orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct net_device_stats *stats = &priv->stats;
	hermes_t *hw = &priv->hw;
	int err = 0;
	u16 txfid = priv->txfid;
	char *p;
	struct ethhdr *eh;
	int len, data_len, data_off;
	struct hermes_tx_descriptor desc;
	unsigned long flags;

	TRACE_ENTER(dev->name);

	if (! netif_running(dev)) {
		printk(KERN_ERR "%s: Tx on stopped device!\n",
		       dev->name);
		TRACE_EXIT(dev->name);
		return 1;
	}
	
	if (netif_queue_stopped(dev)) {
		printk(KERN_DEBUG "%s: Tx while transmitter busy!\n", 
		       dev->name);
		TRACE_EXIT(dev->name);
		return 1;
	}
	
	if (orinoco_lock(priv, &flags) != 0) {
		printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n",
		       dev->name);
		TRACE_EXIT(dev->name);
		return 1;
	}

495
	if (! netif_carrier_ok(dev) || (priv->iw_mode == IW_MODE_MONITOR)) {
Linus Torvalds's avatar
Linus Torvalds committed
496 497 498 499 500 501 502 503 504 505
		/* Oops, the firmware hasn't established a connection,
                   silently drop the packet (this seems to be the
                   safest approach). */
		stats->tx_errors++;
		orinoco_unlock(priv, &flags);
		dev_kfree_skb(skb);
		TRACE_EXIT(dev->name);
		return 0;
	}

506 507 508 509 510 511 512 513
	/* Check packet length, pad short packets, round up odd length */
	len = max_t(int, ALIGN(skb->len, 2), ETH_ZLEN);
	if (skb->len < len) {
		skb = skb_padto(skb, len);
		if (skb == NULL)
			goto fail;
	}
	len -= ETH_HLEN;
Linus Torvalds's avatar
Linus Torvalds committed
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564

	eh = (struct ethhdr *)skb->data;

	memset(&desc, 0, sizeof(desc));
 	desc.tx_control = cpu_to_le16(HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX);
	err = hermes_bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), txfid, 0);
	if (err) {
		if (net_ratelimit())
			printk(KERN_ERR "%s: Error %d writing Tx descriptor "
			       "to BAP\n", dev->name, err);
		stats->tx_errors++;
		goto fail;
	}

	/* Clear the 802.11 header and data length fields - some
	 * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
	 * if this isn't done. */
	hermes_clear_words(hw, HERMES_DATA0,
			   HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);

	/* Encapsulate Ethernet-II frames */
	if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
		struct header_struct hdr;
		data_len = len;
		data_off = HERMES_802_3_OFFSET + sizeof(hdr);
		p = skb->data + ETH_HLEN;

		/* 802.3 header */
		memcpy(hdr.dest, eh->h_dest, ETH_ALEN);
		memcpy(hdr.src, eh->h_source, ETH_ALEN);
		hdr.len = htons(data_len + ENCAPS_OVERHEAD);
		
		/* 802.2 header */
		memcpy(&hdr.dsap, &encaps_hdr, sizeof(encaps_hdr));
			
		hdr.ethertype = eh->h_proto;
		err  = hermes_bap_pwrite(hw, USER_BAP, &hdr, sizeof(hdr),
					 txfid, HERMES_802_3_OFFSET);
		if (err) {
			if (net_ratelimit())
				printk(KERN_ERR "%s: Error %d writing packet "
				       "header to BAP\n", dev->name, err);
			stats->tx_errors++;
			goto fail;
		}
	} else { /* IEEE 802.3 frame */
		data_len = len + ETH_HLEN;
		data_off = HERMES_802_3_OFFSET;
		p = skb->data;
	}

565
	err = hermes_bap_pwrite(hw, USER_BAP, p, data_len,
Linus Torvalds's avatar
Linus Torvalds committed
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580
				txfid, data_off);
	if (err) {
		printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
		       dev->name, err);
		stats->tx_errors++;
		goto fail;
	}

	/* Finally, we actually initiate the send */
	netif_stop_queue(dev);

	err = hermes_docmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
				txfid, NULL);
	if (err) {
		netif_start_queue(dev);
581 582 583
		if (net_ratelimit())
			printk(KERN_ERR "%s: Error %d transmitting packet\n",
				dev->name, err);
Linus Torvalds's avatar
Linus Torvalds committed
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
		stats->tx_errors++;
		goto fail;
	}

	dev->trans_start = jiffies;
	stats->tx_bytes += data_off + data_len;

	orinoco_unlock(priv, &flags);

	dev_kfree_skb(skb);

	TRACE_EXIT(dev->name);

	return 0;
 fail:
	TRACE_EXIT(dev->name);

	orinoco_unlock(priv, &flags);
	return err;
}

static void __orinoco_ev_alloc(struct net_device *dev, hermes_t *hw)
{
	struct orinoco_private *priv = netdev_priv(dev);
	u16 fid = hermes_read_regn(hw, ALLOCFID);

	if (fid != priv->txfid) {
		if (fid != DUMMY_FID)
			printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
			       dev->name, fid);
		return;
	}

	hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
}

static void __orinoco_ev_tx(struct net_device *dev, hermes_t *hw)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct net_device_stats *stats = &priv->stats;

	stats->tx_packets++;

	netif_wake_queue(dev);

	hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
}

static void __orinoco_ev_txexc(struct net_device *dev, hermes_t *hw)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct net_device_stats *stats = &priv->stats;
	u16 fid = hermes_read_regn(hw, TXCOMPLFID);
637
	struct hermes_tx_descriptor_802_11 hdr;
Linus Torvalds's avatar
Linus Torvalds committed
638 639 640 641 642
	int err = 0;

	if (fid == DUMMY_FID)
		return; /* Nothing's really happened */

643 644 645 646 647 648 649 650 651
	/* Read the frame header */
	err = hermes_bap_pread(hw, IRQ_BAP, &hdr,
			       sizeof(struct hermes_tx_descriptor) +
			       sizeof(struct ieee80211_hdr),
			       fid, 0);

	hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
	stats->tx_errors++;

Linus Torvalds's avatar
Linus Torvalds committed
652 653 654 655
	if (err) {
		printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
		       "(FID=%04X error %d)\n",
		       dev->name, fid, err);
656
		return;
Linus Torvalds's avatar
Linus Torvalds committed
657 658
	}
	
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683
	DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
	      err, fid);
    
	/* We produce a TXDROP event only for retry or lifetime
	 * exceeded, because that's the only status that really mean
	 * that this particular node went away.
	 * Other errors means that *we* screwed up. - Jean II */
	hdr.status = le16_to_cpu(hdr.status);
	if (hdr.status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
		union iwreq_data	wrqu;

		/* Copy 802.11 dest address.
		 * We use the 802.11 header because the frame may
		 * not be 802.3 or may be mangled...
		 * In Ad-Hoc mode, it will be the node address.
		 * In managed mode, it will be most likely the AP addr
		 * User space will figure out how to convert it to
		 * whatever it needs (IP address or else).
		 * - Jean II */
		memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
		wrqu.addr.sa_family = ARPHRD_ETHER;

		/* Send event to user space */
		wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
	}
Linus Torvalds's avatar
Linus Torvalds committed
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761

	netif_wake_queue(dev);
}

static void orinoco_tx_timeout(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct net_device_stats *stats = &priv->stats;
	struct hermes *hw = &priv->hw;

	printk(KERN_WARNING "%s: Tx timeout! "
	       "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
	       dev->name, hermes_read_regn(hw, ALLOCFID),
	       hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));

	stats->tx_errors++;

	schedule_work(&priv->reset_work);
}

/********************************************************************/
/* Rx path (data frames)                                            */
/********************************************************************/

/* Does the frame have a SNAP header indicating it should be
 * de-encapsulated to Ethernet-II? */
static inline int is_ethersnap(void *_hdr)
{
	u8 *hdr = _hdr;

	/* We de-encapsulate all packets which, a) have SNAP headers
	 * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
	 * and where b) the OUI of the SNAP header is 00:00:00 or
	 * 00:00:f8 - we need both because different APs appear to use
	 * different OUIs for some reason */
	return (memcmp(hdr, &encaps_hdr, 5) == 0)
		&& ( (hdr[5] == 0x00) || (hdr[5] == 0xf8) );
}

static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
				      int level, int noise)
{
	struct orinoco_private *priv = netdev_priv(dev);
	int i;

	/* Gather wireless spy statistics: for each packet, compare the
	 * source address with out list, and if match, get the stats... */
	for (i = 0; i < priv->spy_number; i++)
		if (!memcmp(mac, priv->spy_address[i], ETH_ALEN)) {
			priv->spy_stat[i].level = level - 0x95;
			priv->spy_stat[i].noise = noise - 0x95;
			priv->spy_stat[i].qual = (level > noise) ? (level - noise) : 0;
			priv->spy_stat[i].updated = 7;
		}
}

static void orinoco_stat_gather(struct net_device *dev,
				struct sk_buff *skb,
				struct hermes_rx_descriptor *desc)
{
	struct orinoco_private *priv = netdev_priv(dev);

	/* Using spy support with lots of Rx packets, like in an
	 * infrastructure (AP), will really slow down everything, because
	 * the MAC address must be compared to each entry of the spy list.
	 * If the user really asks for it (set some address in the
	 * spy list), we do it, but he will pay the price.
	 * Note that to get here, you need both WIRELESS_SPY
	 * compiled in AND some addresses in the list !!!
	 */
	/* Note : gcc will optimise the whole section away if
	 * WIRELESS_SPY is not defined... - Jean II */
	if (SPY_NUMBER(priv)) {
		orinoco_spy_gather(dev, skb->mac.raw + ETH_ALEN,
				   desc->signal, desc->silence);
	}
}

762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872
/*
 * orinoco_rx_monitor - handle received monitor frames.
 *
 * Arguments:
 *	dev		network device
 *	rxfid		received FID
 *	desc		rx descriptor of the frame
 *
 * Call context: interrupt
 */
static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
			       struct hermes_rx_descriptor *desc)
{
	u32 hdrlen = 30;	/* return full header by default */
	u32 datalen = 0;
	u16 fc;
	int err;
	int len;
	struct sk_buff *skb;
	struct orinoco_private *priv = netdev_priv(dev);
	struct net_device_stats *stats = &priv->stats;
	hermes_t *hw = &priv->hw;

	len = le16_to_cpu(desc->data_len);

	/* Determine the size of the header and the data */
	fc = le16_to_cpu(desc->frame_ctl);
	switch (fc & IEEE80211_FCTL_FTYPE) {
	case IEEE80211_FTYPE_DATA:
		if ((fc & IEEE80211_FCTL_TODS)
		    && (fc & IEEE80211_FCTL_FROMDS))
			hdrlen = 30;
		else
			hdrlen = 24;
		datalen = len;
		break;
	case IEEE80211_FTYPE_MGMT:
		hdrlen = 24;
		datalen = len;
		break;
	case IEEE80211_FTYPE_CTL:
		switch (fc & IEEE80211_FCTL_STYPE) {
		case IEEE80211_STYPE_PSPOLL:
		case IEEE80211_STYPE_RTS:
		case IEEE80211_STYPE_CFEND:
		case IEEE80211_STYPE_CFENDACK:
			hdrlen = 16;
			break;
		case IEEE80211_STYPE_CTS:
		case IEEE80211_STYPE_ACK:
			hdrlen = 10;
			break;
		}
		break;
	default:
		/* Unknown frame type */
		break;
	}

	/* sanity check the length */
	if (datalen > IEEE80211_DATA_LEN + 12) {
		printk(KERN_DEBUG "%s: oversized monitor frame, "
		       "data length = %d\n", dev->name, datalen);
		err = -EIO;
		stats->rx_length_errors++;
		goto update_stats;
	}

	skb = dev_alloc_skb(hdrlen + datalen);
	if (!skb) {
		printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
		       dev->name);
		err = -ENOMEM;
		goto drop;
	}

	/* Copy the 802.11 header to the skb */
	memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
	skb->mac.raw = skb->data;

	/* If any, copy the data from the card to the skb */
	if (datalen > 0) {
		err = hermes_bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
				       ALIGN(datalen, 2), rxfid,
				       HERMES_802_2_OFFSET);
		if (err) {
			printk(KERN_ERR "%s: error %d reading monitor frame\n",
			       dev->name, err);
			goto drop;
		}
	}

	skb->dev = dev;
	skb->ip_summed = CHECKSUM_NONE;
	skb->pkt_type = PACKET_OTHERHOST;
	skb->protocol = __constant_htons(ETH_P_802_2);
	
	dev->last_rx = jiffies;
	stats->rx_packets++;
	stats->rx_bytes += skb->len;

	netif_rx(skb);
	return;

 drop:
	dev_kfree_skb_irq(skb);
 update_stats:
	stats->rx_errors++;
	stats->rx_dropped++;
}

Linus Torvalds's avatar
Linus Torvalds committed
873 874 875 876 877 878
static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct net_device_stats *stats = &priv->stats;
	struct iw_statistics *wstats = &priv->wstats;
	struct sk_buff *skb = NULL;
879 880
	u16 rxfid, status, fc;
	int length;
Linus Torvalds's avatar
Linus Torvalds committed
881
	struct hermes_rx_descriptor desc;
882
	struct ethhdr *hdr;
Linus Torvalds's avatar
Linus Torvalds committed
883 884 885 886 887 888 889 890 891
	int err;

	rxfid = hermes_read_regn(hw, RXFID);

	err = hermes_bap_pread(hw, IRQ_BAP, &desc, sizeof(desc),
			       rxfid, 0);
	if (err) {
		printk(KERN_ERR "%s: error %d reading Rx descriptor. "
		       "Frame dropped.\n", dev->name, err);
892
		goto update_stats;
Linus Torvalds's avatar
Linus Torvalds committed
893 894 895 896
	}

	status = le16_to_cpu(desc.status);

897 898 899 900 901
	if (status & HERMES_RXSTAT_BADCRC) {
		DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
		      dev->name);
		stats->rx_crc_errors++;
		goto update_stats;
Linus Torvalds's avatar
Linus Torvalds committed
902 903
	}

904 905 906 907 908
	/* Handle frames in monitor mode */
	if (priv->iw_mode == IW_MODE_MONITOR) {
		orinoco_rx_monitor(dev, rxfid, &desc);
		return;
	}
Linus Torvalds's avatar
Linus Torvalds committed
909

910 911 912 913 914
	if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
		DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
		      dev->name);
		wstats->discard.code++;
		goto update_stats;
Linus Torvalds's avatar
Linus Torvalds committed
915 916
	}

917 918 919
	length = le16_to_cpu(desc.data_len);
	fc = le16_to_cpu(desc.frame_ctl);

Linus Torvalds's avatar
Linus Torvalds committed
920 921 922 923 924
	/* Sanity checks */
	if (length < 3) { /* No for even an 802.2 LLC header */
		/* At least on Symbol firmware with PCF we get quite a
                   lot of these legitimately - Poll frames with no
                   data. */
925
		return;
Linus Torvalds's avatar
Linus Torvalds committed
926
	}
Jeff Garzik's avatar
Jeff Garzik committed
927
	if (length > IEEE80211_DATA_LEN) {
Linus Torvalds's avatar
Linus Torvalds committed
928 929 930
		printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
		       dev->name, length);
		stats->rx_length_errors++;
931
		goto update_stats;
Linus Torvalds's avatar
Linus Torvalds committed
932 933 934 935 936 937 938 939 940 941 942
	}

	/* We need space for the packet data itself, plus an ethernet
	   header, plus 2 bytes so we can align the IP header on a
	   32bit boundary, plus 1 byte so we can read in odd length
	   packets from the card, which has an IO granularity of 16
	   bits */  
	skb = dev_alloc_skb(length+ETH_HLEN+2+1);
	if (!skb) {
		printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
		       dev->name);
943
		goto update_stats;
Linus Torvalds's avatar
Linus Torvalds committed
944 945
	}

946 947 948 949 950 951 952 953 954 955 956 957 958
	/* We'll prepend the header, so reserve space for it.  The worst
	   case is no decapsulation, when 802.3 header is prepended and
	   nothing is removed.  2 is for aligning the IP header.  */
	skb_reserve(skb, ETH_HLEN + 2);

	err = hermes_bap_pread(hw, IRQ_BAP, skb_put(skb, length),
			       ALIGN(length, 2), rxfid,
			       HERMES_802_2_OFFSET);
	if (err) {
		printk(KERN_ERR "%s: error %d reading frame. "
		       "Frame dropped.\n", dev->name, err);
		goto drop;
	}
Linus Torvalds's avatar
Linus Torvalds committed
959 960 961 962 963 964

	/* Handle decapsulation
	 * In most cases, the firmware tell us about SNAP frames.
	 * For some reason, the SNAP frames sent by LinkSys APs
	 * are not properly recognised by most firmwares.
	 * So, check ourselves */
965 966 967 968
	if (length >= ENCAPS_OVERHEAD &&
	    (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
	     ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
	     is_ethersnap(skb->data))) {
Linus Torvalds's avatar
Linus Torvalds committed
969 970 971
		/* These indicate a SNAP within 802.2 LLC within
		   802.11 frame which we'll need to de-encapsulate to
		   the original EthernetII frame. */
972
		hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN - ENCAPS_OVERHEAD);
Linus Torvalds's avatar
Linus Torvalds committed
973
	} else {
974 975 976
		/* 802.3 frame - prepend 802.3 header as is */
		hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN);
		hdr->h_proto = htons(length);
Linus Torvalds's avatar
Linus Torvalds committed
977
	}
978 979 980 981 982
	memcpy(hdr->h_dest, desc.addr1, ETH_ALEN);
	if (fc & IEEE80211_FCTL_FROMDS)
		memcpy(hdr->h_source, desc.addr3, ETH_ALEN);
	else
		memcpy(hdr->h_source, desc.addr2, ETH_ALEN);
Linus Torvalds's avatar
Linus Torvalds committed
983 984 985 986 987

	dev->last_rx = jiffies;
	skb->dev = dev;
	skb->protocol = eth_type_trans(skb, dev);
	skb->ip_summed = CHECKSUM_NONE;
988 989
	if (fc & IEEE80211_FCTL_TODS)
		skb->pkt_type = PACKET_OTHERHOST;
Linus Torvalds's avatar
Linus Torvalds committed
990 991 992 993 994 995 996 997 998 999 1000 1001
	
	/* Process the wireless stats if needed */
	orinoco_stat_gather(dev, skb, &desc);

	/* Pass the packet to the networking stack */
	netif_rx(skb);
	stats->rx_packets++;
	stats->rx_bytes += length;

	return;

 drop:	
1002 1003 1004
	dev_kfree_skb_irq(skb);
 update_stats:
	stats->rx_errors++;
Linus Torvalds's avatar
Linus Torvalds committed
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048
	stats->rx_dropped++;
}

/********************************************************************/
/* Rx path (info frames)                                            */
/********************************************************************/

static void print_linkstatus(struct net_device *dev, u16 status)
{
	char * s;

	if (suppress_linkstatus)
		return;

	switch (status) {
	case HERMES_LINKSTATUS_NOT_CONNECTED:
		s = "Not Connected";
		break;
	case HERMES_LINKSTATUS_CONNECTED:
		s = "Connected";
		break;
	case HERMES_LINKSTATUS_DISCONNECTED:
		s = "Disconnected";
		break;
	case HERMES_LINKSTATUS_AP_CHANGE:
		s = "AP Changed";
		break;
	case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
		s = "AP Out of Range";
		break;
	case HERMES_LINKSTATUS_AP_IN_RANGE:
		s = "AP In Range";
		break;
	case HERMES_LINKSTATUS_ASSOC_FAILED:
		s = "Association Failed";
		break;
	default:
		s = "UNKNOWN";
	}
	
	printk(KERN_INFO "%s: New link status: %s (%04x)\n",
	       dev->name, s, status);
}

1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
/* Search scan results for requested BSSID, join it if found */
static void orinoco_join_ap(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct hermes *hw = &priv->hw;
	int err;
	unsigned long flags;
	struct join_req {
		u8 bssid[ETH_ALEN];
		u16 channel;
	} __attribute__ ((packed)) req;
	const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
1061
	struct prism2_scan_apinfo *atom = NULL;
1062
	int offset = 4;
1063
	int found = 0;
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
	u8 *buf;
	u16 len;

	/* Allocate buffer for scan results */
	buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
	if (! buf)
		return;

	if (orinoco_lock(priv, &flags) != 0)
		goto out;

	/* Sanity checks in case user changed something in the meantime */
	if (! priv->bssid_fixed)
		goto out;

	if (strlen(priv->desired_essid) == 0)
		goto out;

	/* Read scan results from the firmware */
	err = hermes_read_ltv(hw, USER_BAP,
			      HERMES_RID_SCANRESULTSTABLE,
			      MAX_SCAN_LEN, &len, buf);
	if (err) {
		printk(KERN_ERR "%s: Cannot read scan results\n",
		       dev->name);
		goto out;
	}

	len = HERMES_RECLEN_TO_BYTES(len);

	/* Go through the scan results looking for the channel of the AP
	 * we were requested to join */
	for (; offset + atom_len <= len; offset += atom_len) {
		atom = (struct prism2_scan_apinfo *) (buf + offset);
1098 1099 1100 1101
		if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
			found = 1;
			break;
		}
1102 1103
	}

1104 1105 1106 1107 1108
	if (! found) {
		DEBUG(1, "%s: Requested AP not found in scan results\n",
		      dev->name);
		goto out;
	}
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121

	memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
	req.channel = atom->channel;	/* both are little-endian */
	err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
				  &req);
	if (err)
		printk(KERN_ERR "%s: Error issuing join request\n", dev->name);

 out:
	kfree(buf);
	orinoco_unlock(priv, &flags);
}

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
/* Send new BSSID to userspace */
static void orinoco_send_wevents(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct hermes *hw = &priv->hw;
	union iwreq_data wrqu;
	int err;
	unsigned long flags;

	if (orinoco_lock(priv, &flags) != 0)
		return;

	err = hermes_read_ltv(hw, IRQ_BAP, HERMES_RID_CURRENTBSSID,
			      ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
	if (err != 0)
		return;

	wrqu.ap_addr.sa_family = ARPHRD_ETHER;

	/* Send event to user space */
	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
	orinoco_unlock(priv, &flags);
}

Linus Torvalds's avatar
Linus Torvalds committed
1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
static void __orinoco_ev_info(struct net_device *dev, hermes_t *hw)
{
	struct orinoco_private *priv = netdev_priv(dev);
	u16 infofid;
	struct {
		u16 len;
		u16 type;
	} __attribute__ ((packed)) info;
	int len, type;
	int err;

	/* This is an answer to an INQUIRE command that we did earlier,
	 * or an information "event" generated by the card
	 * The controller return to us a pseudo frame containing
	 * the information in question - Jean II */
	infofid = hermes_read_regn(hw, INFOFID);

	/* Read the info frame header - don't try too hard */
	err = hermes_bap_pread(hw, IRQ_BAP, &info, sizeof(info),
			       infofid, 0);
	if (err) {
		printk(KERN_ERR "%s: error %d reading info frame. "
		       "Frame dropped.\n", dev->name, err);
		return;
	}
	
	len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
	type = le16_to_cpu(info.type);

	switch (type) {
	case HERMES_INQ_TALLIES: {
		struct hermes_tallies_frame tallies;
		struct iw_statistics *wstats = &priv->wstats;
		
		if (len > sizeof(tallies)) {
			printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
			       dev->name, len);
			len = sizeof(tallies);
		}
		
1186 1187 1188 1189
		err = hermes_bap_pread(hw, IRQ_BAP, &tallies, len,
				       infofid, sizeof(info));
		if (err)
			break;
Linus Torvalds's avatar
Linus Torvalds committed
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212
		
		/* Increment our various counters */
		/* wstats->discard.nwid - no wrong BSSID stuff */
		wstats->discard.code +=
			le16_to_cpu(tallies.RxWEPUndecryptable);
		if (len == sizeof(tallies))  
			wstats->discard.code +=
				le16_to_cpu(tallies.RxDiscards_WEPICVError) +
				le16_to_cpu(tallies.RxDiscards_WEPExcluded);
		wstats->discard.misc +=
			le16_to_cpu(tallies.TxDiscardsWrongSA);
		wstats->discard.fragment +=
			le16_to_cpu(tallies.RxMsgInBadMsgFragments);
		wstats->discard.retries +=
			le16_to_cpu(tallies.TxRetryLimitExceeded);
		/* wstats->miss.beacon - no match */
	}
	break;
	case HERMES_INQ_LINKSTATUS: {
		struct hermes_linkstatus linkstatus;
		u16 newstatus;
		int connected;

1213 1214 1215
		if (priv->iw_mode == IW_MODE_MONITOR)
			break;

Linus Torvalds's avatar
Linus Torvalds committed
1216 1217 1218 1219 1220 1221
		if (len != sizeof(linkstatus)) {
			printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
			       dev->name, len);
			break;
		}

1222 1223 1224 1225
		err = hermes_bap_pread(hw, IRQ_BAP, &linkstatus, len,
				       infofid, sizeof(info));
		if (err)
			break;
Linus Torvalds's avatar
Linus Torvalds committed
1226 1227
		newstatus = le16_to_cpu(linkstatus.linkstatus);

1228 1229 1230 1231 1232 1233 1234 1235 1236
		/* Symbol firmware uses "out of range" to signal that
		 * the hostscan frame can be requested.  */
		if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
		    priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
		    priv->has_hostscan && priv->scan_inprogress) {
			hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
			break;
		}

Linus Torvalds's avatar
Linus Torvalds committed
1237 1238 1239 1240 1241 1242
		connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
			|| (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
			|| (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);

		if (connected)
			netif_carrier_on(dev);
1243
		else if (!ignore_disconnect)
Linus Torvalds's avatar
Linus Torvalds committed
1244 1245
			netif_carrier_off(dev);

1246 1247
		if (newstatus != priv->last_linkstatus) {
			priv->last_linkstatus = newstatus;
Linus Torvalds's avatar
Linus Torvalds committed
1248
			print_linkstatus(dev, newstatus);
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285
			/* The info frame contains only one word which is the
			 * status (see hermes.h). The status is pretty boring
			 * in itself, that's why we export the new BSSID...
			 * Jean II */
			schedule_work(&priv->wevent_work);
		}
	}
	break;
	case HERMES_INQ_SCAN:
		if (!priv->scan_inprogress && priv->bssid_fixed &&
		    priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
			schedule_work(&priv->join_work);
			break;
		}
		/* fall through */
	case HERMES_INQ_HOSTSCAN:
	case HERMES_INQ_HOSTSCAN_SYMBOL: {
		/* Result of a scanning. Contains information about
		 * cells in the vicinity - Jean II */
		union iwreq_data	wrqu;
		unsigned char *buf;

		/* Sanity check */
		if (len > 4096) {
			printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
			       dev->name, len);
			break;
		}

		/* We are a strict producer. If the previous scan results
		 * have not been consumed, we just have to drop this
		 * frame. We can't remove the previous results ourselves,
		 * that would be *very* racy... Jean II */
		if (priv->scan_result != NULL) {
			printk(KERN_WARNING "%s: Previous scan results not consumed, dropping info frame.\n", dev->name);
			break;
		}
Linus Torvalds's avatar
Linus Torvalds committed
1286

1287 1288 1289 1290 1291 1292 1293 1294 1295
		/* Allocate buffer for results */
		buf = kmalloc(len, GFP_ATOMIC);
		if (buf == NULL)
			/* No memory, so can't printk()... */
			break;

		/* Read scan data */
		err = hermes_bap_pread(hw, IRQ_BAP, (void *) buf, len,
				       infofid, sizeof(info));
1296 1297
		if (err) {
			kfree(buf);
1298
			break;
1299
		}
Linus Torvalds's avatar
Linus Torvalds committed
1300

1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
#ifdef ORINOCO_DEBUG
		{
			int	i;
			printk(KERN_DEBUG "Scan result [%02X", buf[0]);
			for(i = 1; i < (len * 2); i++)
				printk(":%02X", buf[i]);
			printk("]\n");
		}
#endif	/* ORINOCO_DEBUG */

		/* Allow the clients to access the results */
		priv->scan_len = len;
		priv->scan_result = buf;

		/* Send an empty event to user space.
		 * We don't send the received data on the event because
		 * it would require us to do complex transcoding, and
		 * we want to minimise the work done in the irq handler
		 * Use a request to extract the data - Jean II */
		wrqu.data.length = 0;
		wrqu.data.flags = 0;
		wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
1323 1324
	}
	break;
1325 1326 1327 1328 1329 1330
	case HERMES_INQ_SEC_STAT_AGERE:
		/* Security status (Agere specific) */
		/* Ignore this frame for now */
		if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
			break;
		/* fall through */
Linus Torvalds's avatar
Linus Torvalds committed
1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354
	default:
		printk(KERN_DEBUG "%s: Unknown information frame received: "
		       "type 0x%04x, length %d\n", dev->name, type, len);
		/* We don't actually do anything about it */
		break;
	}
}

static void __orinoco_ev_infdrop(struct net_device *dev, hermes_t *hw)
{
	if (net_ratelimit())
		printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
}

/********************************************************************/
/* Internal hardware control routines                               */
/********************************************************************/

int __orinoco_up(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct hermes *hw = &priv->hw;
	int err;

1355 1356
	netif_carrier_off(dev); /* just to make sure */

Linus Torvalds's avatar
Linus Torvalds committed
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
	err = __orinoco_program_rids(dev);
	if (err) {
		printk(KERN_ERR "%s: Error %d configuring card\n",
		       dev->name, err);
		return err;
	}

	/* Fire things up again */
	hermes_set_irqmask(hw, ORINOCO_INTEN);
	err = hermes_enable_port(hw, 0);
	if (err) {
		printk(KERN_ERR "%s: Error %d enabling MAC port\n",
		       dev->name, err);
		return err;
	}

	netif_start_queue(dev);

	return 0;
}

int __orinoco_down(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct hermes *hw = &priv->hw;
	int err;

	netif_stop_queue(dev);

	if (! priv->hw_unavailable) {
		if (! priv->broken_disableport) {
			err = hermes_disable_port(hw, 0);
			if (err) {
				/* Some firmwares (e.g. Intersil 1.3.x) seem
				 * to have problems disabling the port, oh
				 * well, too bad. */
				printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
				       dev->name, err);
				priv->broken_disableport = 1;
			}
		}
		hermes_set_irqmask(hw, 0);
		hermes_write_regn(hw, EVACK, 0xffff);
	}
	
	/* firmware will have to reassociate */
	netif_carrier_off(dev);
	priv->last_linkstatus = 0xffff;

	return 0;
}

int orinoco_reinit_firmware(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	struct hermes *hw = &priv->hw;
	int err;

	err = hermes_init(hw);
	if (err)
		return err;

	err = hermes_allocate(hw, priv->nicbuf_size, &priv->txfid);
1420
	if (err == -EIO && priv->nicbuf_size > TX_NICBUF_SIZE_BUG) {
Linus Torvalds's avatar
Linus Torvalds committed
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466
		/* Try workaround for old Symbol firmware bug */
		printk(KERN_WARNING "%s: firmware ALLOC bug detected "
		       "(old Symbol firmware?). Trying to work around... ",
		       dev->name);
		
		priv->nicbuf_size = TX_NICBUF_SIZE_BUG;
		err = hermes_allocate(hw, priv->nicbuf_size, &priv->txfid);
		if (err)
			printk("failed!\n");
		else
			printk("ok.\n");
	}

	return err;
}

static int __orinoco_hw_set_bitrate(struct orinoco_private *priv)
{
	hermes_t *hw = &priv->hw;
	int err = 0;

	if (priv->bitratemode >= BITRATE_TABLE_SIZE) {
		printk(KERN_ERR "%s: BUG: Invalid bitrate mode %d\n",
		       priv->ndev->name, priv->bitratemode);
		return -EINVAL;
	}

	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFTXRATECONTROL,
					   bitrate_table[priv->bitratemode].agere_txratectrl);
		break;
	case FIRMWARE_TYPE_INTERSIL:
	case FIRMWARE_TYPE_SYMBOL:
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFTXRATECONTROL,
					   bitrate_table[priv->bitratemode].intersil_txratectrl);
		break;
	default:
		BUG();
	}

	return err;
}

1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496
/* Set fixed AP address */
static int __orinoco_hw_set_wap(struct orinoco_private *priv)
{
	int roaming_flag;
	int err = 0;
	hermes_t *hw = &priv->hw;

	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
		/* not supported */
		break;
	case FIRMWARE_TYPE_INTERSIL:
		if (priv->bssid_fixed)
			roaming_flag = 2;
		else
			roaming_flag = 1;

		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFROAMINGMODE,
					   roaming_flag);
		break;
	case FIRMWARE_TYPE_SYMBOL:
		err = HERMES_WRITE_RECORD(hw, USER_BAP,
					  HERMES_RID_CNFMANDATORYBSSID_SYMBOL,
					  &priv->desired_bssid);
		break;
	}
	return err;
}

Linus Torvalds's avatar
Linus Torvalds committed
1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646
/* Change the WEP keys and/or the current keys.  Can be called
 * either from __orinoco_hw_setup_wep() or directly from
 * orinoco_ioctl_setiwencode().  In the later case the association
 * with the AP is not broken (if the firmware can handle it),
 * which is needed for 802.1x implementations. */
static int __orinoco_hw_setup_wepkeys(struct orinoco_private *priv)
{
	hermes_t *hw = &priv->hw;
	int err = 0;

	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
		err = HERMES_WRITE_RECORD(hw, USER_BAP,
					  HERMES_RID_CNFWEPKEYS_AGERE,
					  &priv->keys);
		if (err)
			return err;
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFTXKEY_AGERE,
					   priv->tx_key);
		if (err)
			return err;
		break;
	case FIRMWARE_TYPE_INTERSIL:
	case FIRMWARE_TYPE_SYMBOL:
		{
			int keylen;
			int i;

			/* Force uniform key length to work around firmware bugs */
			keylen = le16_to_cpu(priv->keys[priv->tx_key].len);
			
			if (keylen > LARGE_KEY_SIZE) {
				printk(KERN_ERR "%s: BUG: Key %d has oversize length %d.\n",
				       priv->ndev->name, priv->tx_key, keylen);
				return -E2BIG;
			}

			/* Write all 4 keys */
			for(i = 0; i < ORINOCO_MAX_KEYS; i++) {
				err = hermes_write_ltv(hw, USER_BAP,
						       HERMES_RID_CNFDEFAULTKEY0 + i,
						       HERMES_BYTES_TO_RECLEN(keylen),
						       priv->keys[i].data);
				if (err)
					return err;
			}

			/* Write the index of the key used in transmission */
			err = hermes_write_wordrec(hw, USER_BAP,
						   HERMES_RID_CNFWEPDEFAULTKEYID,
						   priv->tx_key);
			if (err)
				return err;
		}
		break;
	}

	return 0;
}

static int __orinoco_hw_setup_wep(struct orinoco_private *priv)
{
	hermes_t *hw = &priv->hw;
	int err = 0;
	int master_wep_flag;
	int auth_flag;

	if (priv->wep_on)
		__orinoco_hw_setup_wepkeys(priv);

	if (priv->wep_restrict)
		auth_flag = HERMES_AUTH_SHARED_KEY;
	else
		auth_flag = HERMES_AUTH_OPEN;

	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE: /* Agere style WEP */
		if (priv->wep_on) {
			/* Enable the shared-key authentication. */
			err = hermes_write_wordrec(hw, USER_BAP,
						   HERMES_RID_CNFAUTHENTICATION_AGERE,
						   auth_flag);
		}
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFWEPENABLED_AGERE,
					   priv->wep_on);
		if (err)
			return err;
		break;

	case FIRMWARE_TYPE_INTERSIL: /* Intersil style WEP */
	case FIRMWARE_TYPE_SYMBOL: /* Symbol style WEP */
		if (priv->wep_on) {
			if (priv->wep_restrict ||
			    (priv->firmware_type == FIRMWARE_TYPE_SYMBOL))
				master_wep_flag = HERMES_WEP_PRIVACY_INVOKED |
						  HERMES_WEP_EXCL_UNENCRYPTED;
			else
				master_wep_flag = HERMES_WEP_PRIVACY_INVOKED;

			err = hermes_write_wordrec(hw, USER_BAP,
						   HERMES_RID_CNFAUTHENTICATION,
						   auth_flag);
			if (err)
				return err;
		} else
			master_wep_flag = 0;

		if (priv->iw_mode == IW_MODE_MONITOR)
			master_wep_flag |= HERMES_WEP_HOST_DECRYPT;

		/* Master WEP setting : on/off */
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFWEPFLAGS_INTERSIL,
					   master_wep_flag);
		if (err)
			return err;	

		break;
	}

	return 0;
}

static int __orinoco_program_rids(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	hermes_t *hw = &priv->hw;
	int err;
	struct hermes_idstring idbuf;

	/* Set the MAC address */
	err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNMACADDR,
			       HERMES_BYTES_TO_RECLEN(ETH_ALEN), dev->dev_addr);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting MAC address\n",
		       dev->name, err);
		return err;
	}

	/* Set up the link mode */
	err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFPORTTYPE,
				   priv->port_type);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting port type\n",
		       dev->name, err);
		return err;
	}
	/* Set the channel/frequency */
1647 1648 1649 1650 1651 1652 1653 1654 1655
	if (priv->channel != 0 && priv->iw_mode != IW_MODE_INFRA) {
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFOWNCHANNEL,
					   priv->channel);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting channel %d\n",
			       dev->name, err, priv->channel);
			return err;
		}
Linus Torvalds's avatar
Linus Torvalds committed
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681
	}

	if (priv->has_ibss) {
		u16 createibss;

		if ((strlen(priv->desired_essid) == 0) && (priv->createibss)) {
			printk(KERN_WARNING "%s: This firmware requires an "
			       "ESSID in IBSS-Ad-Hoc mode.\n", dev->name);
			/* With wvlan_cs, in this case, we would crash.
			 * hopefully, this driver will behave better...
			 * Jean II */
			createibss = 0;
		} else {
			createibss = priv->createibss;
		}
		
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFCREATEIBSS,
					   createibss);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting CREATEIBSS\n",
			       dev->name, err);
			return err;
		}
	}

1682 1683 1684 1685 1686 1687 1688
	/* Set the desired BSSID */
	err = __orinoco_hw_set_wap(priv);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting AP address\n",
		       dev->name, err);
		return err;
	}
Linus Torvalds's avatar
Linus Torvalds committed
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826
	/* Set the desired ESSID */
	idbuf.len = cpu_to_le16(strlen(priv->desired_essid));
	memcpy(&idbuf.val, priv->desired_essid, sizeof(idbuf.val));
	/* WinXP wants partner to configure OWNSSID even in IBSS mode. (jimc) */
	err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNSSID,
			       HERMES_BYTES_TO_RECLEN(strlen(priv->desired_essid)+2),
			       &idbuf);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting OWNSSID\n",
		       dev->name, err);
		return err;
	}
	err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFDESIREDSSID,
			       HERMES_BYTES_TO_RECLEN(strlen(priv->desired_essid)+2),
			       &idbuf);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting DESIREDSSID\n",
		       dev->name, err);
		return err;
	}

	/* Set the station name */
	idbuf.len = cpu_to_le16(strlen(priv->nick));
	memcpy(&idbuf.val, priv->nick, sizeof(idbuf.val));<