git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/hostap/hostap_hw.c

   1 /*
   2  * Host AP (software wireless LAN access point) driver for
   3  * Intersil Prism2/2.5/3.
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <j@w1.fi>
   7  * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation. See README and COPYING for
  12  * more details.
  13  *
  14  * FIX:
  15  * - there is currently no way of associating TX packets to correct wds device
  16  *   when TX Exc/OK event occurs, so all tx_packets and some
  17  *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
  18  *   field in txdesc might be used to fix this (using Alloc event to increment
  19  *   tx_packets would need some further info in txfid table)
  20  *
  21  * Buffer Access Path (BAP) usage:
  22  *   Prism2 cards have two separate BAPs for accessing the card memory. These
  23  *   should allow concurrent access to two different frames and the driver
  24  *   previously used BAP0 for sending data and BAP1 for receiving data.
  25  *   However, there seems to be number of issues with concurrent access and at
  26  *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
  27  *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
  28  *   host and card memories. BAP0 accesses are protected with local->baplock
  29  *   (spin_lock_bh) to prevent concurrent use.
  30  */
  31
  32
  33
  34 #include <asm/delay.h>
  35 #include <asm/uaccess.h>
  36
  37 #include <linux/slab.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/proc_fs.h>
  41 #include <linux/if_arp.h>
  42 #include <linux/delay.h>
  43 #include <linux/random.h>
  44 #include <linux/wait.h>
  45 #include <linux/sched.h>
  46 #include <linux/rtnetlink.h>
  47 #include <linux/wireless.h>
  48 #include <net/iw_handler.h>
  49 #include <net/ieee80211.h>
  50 #include <net/ieee80211_crypt.h>
  51 #include <asm/irq.h>
  52
  53 #include "hostap_80211.h"
  54 #include "hostap.h"
  55 #include "hostap_ap.h"
  56
  57
  58 /* #define final_version */
  59
  60 static int mtu = 1500;
  61 module_param(mtu, int, 0444);
  62 MODULE_PARM_DESC(mtu, "Maximum transfer unit");
  63
  64 static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
  65 module_param_array(channel, int, NULL, 0444);
  66 MODULE_PARM_DESC(channel, "Initial channel");
  67
  68 static char essid[33] = "test";
  69 module_param_string(essid, essid, sizeof(essid), 0444);
  70 MODULE_PARM_DESC(essid, "Host AP's ESSID");
  71
  72 static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
  73 module_param_array(iw_mode, int, NULL, 0444);
  74 MODULE_PARM_DESC(iw_mode, "Initial operation mode");
  75
  76 static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
  77 module_param_array(beacon_int, int, NULL, 0444);
  78 MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
  79
  80 static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
  81 module_param_array(dtim_period, int, NULL, 0444);
  82 MODULE_PARM_DESC(dtim_period, "DTIM period");
  83
  84 static char dev_template[16] = "wlan%d";
  85 module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
  86 MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
  87                  "wlan%d)");
  88
  89 #ifdef final_version
  90 #define EXTRA_EVENTS_WTERR 0
  91 #else
  92 /* check WTERR events (Wait Time-out) in development versions */
  93 #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
  94 #endif
  95
  96 /* Events that will be using BAP0 */
  97 #define HFA384X_BAP0_EVENTS \
  98         (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
  99
 100 /* event mask, i.e., events that will result in an interrupt */
 101 #define HFA384X_EVENT_MASK \
 102         (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
 103         HFA384X_EV_CMD | HFA384X_EV_TICK | \
 104         EXTRA_EVENTS_WTERR)
 105
 106 /* Default TX control flags: use 802.11 headers and request interrupt for
 107  * failed transmits. Frames that request ACK callback, will add
 108  * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
 109  */
 110 #define HFA384X_TX_CTRL_FLAGS \
 111         (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
 112
 113
 114 /* ca. 1 usec */
 115 #define HFA384X_CMD_BUSY_TIMEOUT 5000
 116 #define HFA384X_BAP_BUSY_TIMEOUT 50000
 117
 118 /* ca. 10 usec */
 119 #define HFA384X_CMD_COMPL_TIMEOUT 20000
 120 #define HFA384X_DL_COMPL_TIMEOUT 1000000
 121
 122 /* Wait times for initialization; yield to other processes to avoid busy
 123  * waiting for long time. */
 124 #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
 125 #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
 126
 127
 128 static void prism2_hw_reset(struct net_device *dev);
 129 static void prism2_check_sta_fw_version(local_info_t *local);
 130
 131 #ifdef PRISM2_DOWNLOAD_SUPPORT
 132 /* hostap_download.c */
 133 static int prism2_download_aux_dump(struct net_device *dev,
 134                                     unsigned int addr, int len, u8 *buf);
 135 static u8 * prism2_read_pda(struct net_device *dev);
 136 static int prism2_download(local_info_t *local,
 137                            struct prism2_download_param *param);
 138 static void prism2_download_free_data(struct prism2_download_data *dl);
 139 static int prism2_download_volatile(local_info_t *local,
 140                                     struct prism2_download_data *param);
 141 static int prism2_download_genesis(local_info_t *local,
 142                                    struct prism2_download_data *param);
 143 static int prism2_get_ram_size(local_info_t *local);
 144 #endif /* PRISM2_DOWNLOAD_SUPPORT */
 145
 146
 147
 148
 149 #ifndef final_version
 150 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
 151  * present */
 152 #define HFA384X_MAGIC 0x8A32
 153 #endif
 154
 155
 156 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
 157 {
 158         return HFA384X_INW(reg);
 159 }
 160
 161
 162 static void hfa384x_read_regs(struct net_device *dev,
 163                               struct hfa384x_regs *regs)
 164 {
 165         regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
 166         regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
 167         regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
 168         regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
 169         regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
 170 }
 171
 172
 173 /**
 174  * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
 175  * @local: pointer to private Host AP driver data
 176  * @entry: Prism2 command queue entry to be freed
 177  * @del_req: request the entry to be removed
 178  *
 179  * Internal helper function for freeing Prism2 command queue entries.
 180  * Caller must have acquired local->cmdlock before calling this function.
 181  */
 182 static inline void __hostap_cmd_queue_free(local_info_t *local,
 183                                            struct hostap_cmd_queue *entry,
 184                                            int del_req)
 185 {
 186         if (del_req) {
 187                 entry->del_req = 1;
 188                 if (!list_empty(&entry->list)) {
 189                         list_del_init(&entry->list);
 190                         local->cmd_queue_len--;
 191                 }
 192         }
 193
 194         if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
 195                 kfree(entry);
 196 }
 197
 198
 199 /**
 200  * hostap_cmd_queue_free - Free Prism2 command queue entry
 201  * @local: pointer to private Host AP driver data
 202  * @entry: Prism2 command queue entry to be freed
 203  * @del_req: request the entry to be removed
 204  *
 205  * Free a Prism2 command queue entry.
 206  */
 207 static inline void hostap_cmd_queue_free(local_info_t *local,
 208                                          struct hostap_cmd_queue *entry,
 209                                          int del_req)
 210 {
 211         unsigned long flags;
 212
 213         spin_lock_irqsave(&local->cmdlock, flags);
 214         __hostap_cmd_queue_free(local, entry, del_req);
 215         spin_unlock_irqrestore(&local->cmdlock, flags);
 216 }
 217
 218
 219 /**
 220  * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
 221  * @local: pointer to private Host AP driver data
 222  */
 223 static void prism2_clear_cmd_queue(local_info_t *local)
 224 {
 225         struct list_head *ptr, *n;
 226         unsigned long flags;
 227         struct hostap_cmd_queue *entry;
 228
 229         spin_lock_irqsave(&local->cmdlock, flags);
 230         list_for_each_safe(ptr, n, &local->cmd_queue) {
 231                 entry = list_entry(ptr, struct hostap_cmd_queue, list);
 232                 atomic_inc(&entry->usecnt);
 233                 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
 234                        "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
 235                        local->dev->name, entry->type, entry->cmd,
 236                        entry->param0);
 237                 __hostap_cmd_queue_free(local, entry, 1);
 238         }
 239         if (local->cmd_queue_len) {
 240                 /* This should not happen; print debug message and clear
 241                  * queue length. */
 242                 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
 243                        "flush\n", local->dev->name, local->cmd_queue_len);
 244                 local->cmd_queue_len = 0;
 245         }
 246         spin_unlock_irqrestore(&local->cmdlock, flags);
 247 }
 248
 249
 250 /**
 251  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
 252  * @dev: pointer to net_device
 253  * @entry: Prism2 command queue entry to be issued
 254  */
 255 static int hfa384x_cmd_issue(struct net_device *dev,
 256                                     struct hostap_cmd_queue *entry)
 257 {
 258         struct hostap_interface *iface;
 259         local_info_t *local;
 260         int tries;
 261         u16 reg;
 262         unsigned long flags;
 263
 264         iface = netdev_priv(dev);
 265         local = iface->local;
 266
 267         if (local->func->card_present && !local->func->card_present(local))
 268                 return -ENODEV;
 269
 270         if (entry->issued) {
 271                 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
 272                        dev->name, entry);
 273         }
 274
 275         /* wait until busy bit is clear; this should always be clear since the
 276          * commands are serialized */
 277         tries = HFA384X_CMD_BUSY_TIMEOUT;
 278         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 279                 tries--;
 280                 udelay(1);
 281         }
 282 #ifndef final_version
 283         if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
 284                 prism2_io_debug_error(dev, 1);
 285                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
 286                        "for %d usec\n", dev->name,
 287                        HFA384X_CMD_BUSY_TIMEOUT - tries);
 288         }
 289 #endif
 290         if (tries == 0) {
 291                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 292                 prism2_io_debug_error(dev, 2);
 293                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
 294                        "reg=0x%04x\n", dev->name, reg);
 295                 return -ETIMEDOUT;
 296         }
 297
 298         /* write command */
 299         spin_lock_irqsave(&local->cmdlock, flags);
 300         HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
 301         HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
 302         HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
 303         entry->issued = 1;
 304         spin_unlock_irqrestore(&local->cmdlock, flags);
 305
 306         return 0;
 307 }
 308
 309
 310 /**
 311  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
 312  * @dev: pointer to net_device
 313  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 314  * @param0: value for Param0 register
 315  * @param1: value for Param1 register (pointer; %NULL if not used)
 316  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
 317  *
 318  * Issue given command (possibly after waiting in command queue) and sleep
 319  * until the command is completed (or timed out or interrupted). This can be
 320  * called only from user process context.
 321  */
 322 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
 323                        u16 *param1, u16 *resp0)
 324 {
 325         struct hostap_interface *iface;
 326         local_info_t *local;
 327         int err, res, issue, issued = 0;
 328         unsigned long flags;
 329         struct hostap_cmd_queue *entry;
 330         DECLARE_WAITQUEUE(wait, current);
 331
 332         iface = netdev_priv(dev);
 333         local = iface->local;
 334
 335         if (in_interrupt()) {
 336                 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
 337                        "context\n", dev->name);
 338                 return -1;
 339         }
 340
 341         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
 342                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 343                        dev->name);
 344                 return -1;
 345         }
 346
 347         if (signal_pending(current))
 348                 return -EINTR;
 349
 350         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 351         if (entry == NULL) {
 352                 printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
 353                        dev->name);
 354                 return -ENOMEM;
 355         }
 356         atomic_set(&entry->usecnt, 1);
 357         entry->type = CMD_SLEEP;
 358         entry->cmd = cmd;
 359         entry->param0 = param0;
 360         if (param1)
 361                 entry->param1 = *param1;
 362         init_waitqueue_head(&entry->compl);
 363
 364         /* prepare to wait for command completion event, but do not sleep yet
 365          */
 366         add_wait_queue(&entry->compl, &wait);
 367         set_current_state(TASK_INTERRUPTIBLE);
 368
 369         spin_lock_irqsave(&local->cmdlock, flags);
 370         issue = list_empty(&local->cmd_queue);
 371         if (issue)
 372                 entry->issuing = 1;
 373         list_add_tail(&entry->list, &local->cmd_queue);
 374         local->cmd_queue_len++;
 375         spin_unlock_irqrestore(&local->cmdlock, flags);
 376
 377         err = 0;
 378         if (!issue)
 379                 goto wait_completion;
 380
 381         if (signal_pending(current))
 382                 err = -EINTR;
 383
 384         if (!err) {
 385                 if (hfa384x_cmd_issue(dev, entry))
 386                         err = -ETIMEDOUT;
 387                 else
 388                         issued = 1;
 389         }
 390
 391  wait_completion:
 392         if (!err && entry->type != CMD_COMPLETED) {
 393                 /* sleep until command is completed or timed out */
 394                 res = schedule_timeout(2 * HZ);
 395         } else
 396                 res = -1;
 397
 398         if (!err && signal_pending(current))
 399                 err = -EINTR;
 400
 401         if (err && issued) {
 402                 /* the command was issued, so a CmdCompl event should occur
 403                  * soon; however, there's a pending signal and
 404                  * schedule_timeout() would be interrupted; wait a short period
 405                  * of time to avoid removing entry from the list before
 406                  * CmdCompl event */
 407                 udelay(300);
 408         }
 409
 410         set_current_state(TASK_RUNNING);
 411         remove_wait_queue(&entry->compl, &wait);
 412
 413         /* If entry->list is still in the list, it must be removed
 414          * first and in this case prism2_cmd_ev() does not yet have
 415          * local reference to it, and the data can be kfree()'d
 416          * here. If the command completion event is still generated,
 417          * it will be assigned to next (possibly) pending command, but
 418          * the driver will reset the card anyway due to timeout
 419          *
 420          * If the entry is not in the list prism2_cmd_ev() has a local
 421          * reference to it, but keeps cmdlock as long as the data is
 422          * needed, so the data can be kfree()'d here. */
 423
 424         /* FIX: if the entry->list is in the list, it has not been completed
 425          * yet, so removing it here is somewhat wrong.. this could cause
 426          * references to freed memory and next list_del() causing NULL pointer
 427          * dereference.. it would probably be better to leave the entry in the
 428          * list and the list should be emptied during hw reset */
 429
 430         spin_lock_irqsave(&local->cmdlock, flags);
 431         if (!list_empty(&entry->list)) {
 432                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
 433                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
 434                        entry->type, res);
 435                 list_del_init(&entry->list);
 436                 local->cmd_queue_len--;
 437         }
 438         spin_unlock_irqrestore(&local->cmdlock, flags);
 439
 440         if (err) {
 441                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
 442                        dev->name, err);
 443                 res = err;
 444                 goto done;
 445         }
 446
 447         if (entry->type != CMD_COMPLETED) {
 448                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 449                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
 450                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
 451                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
 452                        res, entry, entry->type, entry->cmd, entry->param0, reg,
 453                        HFA384X_INW(HFA384X_INTEN_OFF));
 454                 if (reg & HFA384X_EV_CMD) {
 455                         /* Command completion event is pending, but the
 456                          * interrupt was not delivered - probably an issue
 457                          * with pcmcia-cs configuration. */
 458                         printk(KERN_WARNING "%s: interrupt delivery does not "
 459                                "seem to work\n", dev->name);
 460                 }
 461                 prism2_io_debug_error(dev, 3);
 462                 res = -ETIMEDOUT;
 463                 goto done;
 464         }
 465
 466         if (resp0 != NULL)
 467                 *resp0 = entry->resp0;
 468 #ifndef final_version
 469         if (entry->res) {
 470                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
 471                        "resp0=0x%04x\n",
 472                        dev->name, cmd, entry->res, entry->resp0);
 473         }
 474 #endif /* final_version */
 475
 476         res = entry->res;
 477  done:
 478         hostap_cmd_queue_free(local, entry, 1);
 479         return res;
 480 }
 481
 482
 483 /**
 484  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
 485  * @dev: pointer to net_device
 486  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 487  * @param0: value for Param0 register
 488  * @callback: command completion callback function (%NULL = no callback)
 489  * @context: context data to be given to the callback function
 490  *
 491  * Issue given command (possibly after waiting in command queue) and use
 492  * callback function to indicate command completion. This can be called both
 493  * from user and interrupt context. The callback function will be called in
 494  * hardware IRQ context. It can be %NULL, when no function is called when
 495  * command is completed.
 496  */
 497 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
 498                                 void (*callback)(struct net_device *dev,
 499                                                  long context, u16 resp0,
 500                                                  u16 status),
 501                                 long context)
 502 {
 503         struct hostap_interface *iface;
 504         local_info_t *local;
 505         int issue, ret;
 506         unsigned long flags;
 507         struct hostap_cmd_queue *entry;
 508
 509         iface = netdev_priv(dev);
 510         local = iface->local;
 511
 512         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
 513                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 514                        dev->name);
 515                 return -1;
 516         }
 517
 518         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 519         if (entry == NULL) {
 520                 printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
 521                        "failed\n", dev->name);
 522                 return -ENOMEM;
 523         }
 524         atomic_set(&entry->usecnt, 1);
 525         entry->type = CMD_CALLBACK;
 526         entry->cmd = cmd;
 527         entry->param0 = param0;
 528         entry->callback = callback;
 529         entry->context = context;
 530
 531         spin_lock_irqsave(&local->cmdlock, flags);
 532         issue = list_empty(&local->cmd_queue);
 533         if (issue)
 534                 entry->issuing = 1;
 535         list_add_tail(&entry->list, &local->cmd_queue);
 536         local->cmd_queue_len++;
 537         spin_unlock_irqrestore(&local->cmdlock, flags);
 538
 539         if (issue && hfa384x_cmd_issue(dev, entry))
 540                 ret = -ETIMEDOUT;
 541         else
 542                 ret = 0;
 543
 544         hostap_cmd_queue_free(local, entry, ret);
 545
 546         return ret;
 547 }
 548
 549
 550 /**
 551  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
 552  * @dev: pointer to net_device
 553  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 554  * @param0: value for Param0 register
 555  * @io_debug_num: I/O debug error number
 556  *
 557  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
 558  */
 559 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
 560                                  int io_debug_num)
 561 {
 562         int tries;
 563         u16 reg;
 564
 565         /* wait until busy bit is clear; this should always be clear since the
 566          * commands are serialized */
 567         tries = HFA384X_CMD_BUSY_TIMEOUT;
 568         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 569                 tries--;
 570                 udelay(1);
 571         }
 572         if (tries == 0) {
 573                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 574                 prism2_io_debug_error(dev, io_debug_num);
 575                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
 576                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
 577                 return -ETIMEDOUT;
 578         }
 579
 580         /* write command */
 581         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
 582         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
 583
 584         return 0;
 585 }
 586
 587
 588 /**
 589  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
 590  * @dev: pointer to net_device
 591  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 592  * @param0: value for Param0 register
 593  */
 594 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
 595 {
 596         int res, tries;
 597         u16 reg;
 598
 599         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
 600         if (res)
 601                 return res;
 602
 603         /* wait for command completion */
 604         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
 605                 tries = HFA384X_DL_COMPL_TIMEOUT;
 606         else
 607                 tries = HFA384X_CMD_COMPL_TIMEOUT;
 608
 609         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
 610                tries > 0) {
 611                 tries--;
 612                 udelay(10);
 613         }
 614         if (tries == 0) {
 615                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 616                 prism2_io_debug_error(dev, 5);
 617                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
 618                        "reg=0x%04x\n", dev->name, reg);
 619                 return -ETIMEDOUT;
 620         }
 621
 622         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 623                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
 624                 BIT(8))) >> 8;
 625 #ifndef final_version
 626         if (res) {
 627                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
 628                        dev->name, cmd, res);
 629         }
 630 #endif
 631
 632         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 633
 634         return res;
 635 }
 636
 637
 638 /**
 639  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
 640  * @dev: pointer to net_device
 641  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 642  * @param0: value for Param0 register
 643  */
 644 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
 645                                       u16 param0)
 646 {
 647         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
 648 }
 649
 650
 651 /**
 652  * prism2_cmd_ev - Prism2 command completion event handler
 653  * @dev: pointer to net_device
 654  *
 655  * Interrupt handler for command completion events. Called by the main
 656  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
 657  * from the hardware and ACK the event. Depending on the issued command type
 658  * either wake up the sleeping process that is waiting for command completion
 659  * or call the callback function. Issue the next command, if one is pending.
 660  */
 661 static void prism2_cmd_ev(struct net_device *dev)
 662 {
 663         struct hostap_interface *iface;
 664         local_info_t *local;
 665         struct hostap_cmd_queue *entry = NULL;
 666
 667         iface = netdev_priv(dev);
 668         local = iface->local;
 669
 670         spin_lock(&local->cmdlock);
 671         if (!list_empty(&local->cmd_queue)) {
 672                 entry = list_entry(local->cmd_queue.next,
 673                                    struct hostap_cmd_queue, list);
 674                 atomic_inc(&entry->usecnt);
 675                 list_del_init(&entry->list);
 676                 local->cmd_queue_len--;
 677
 678                 if (!entry->issued) {
 679                         printk(KERN_DEBUG "%s: Command completion event, but "
 680                                "cmd not issued\n", dev->name);
 681                         __hostap_cmd_queue_free(local, entry, 1);
 682                         entry = NULL;
 683                 }
 684         }
 685         spin_unlock(&local->cmdlock);
 686
 687         if (!entry) {
 688                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 689                 printk(KERN_DEBUG "%s: Command completion event, but no "
 690                        "pending commands\n", dev->name);
 691                 return;
 692         }
 693
 694         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
 695         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 696                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
 697                        BIT(9) | BIT(8))) >> 8;
 698         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 699
 700         /* TODO: rest of the CmdEv handling could be moved to tasklet */
 701         if (entry->type == CMD_SLEEP) {
 702                 entry->type = CMD_COMPLETED;
 703                 wake_up_interruptible(&entry->compl);
 704         } else if (entry->type == CMD_CALLBACK) {
 705                 if (entry->callback)
 706                         entry->callback(dev, entry->context, entry->resp0,
 707                                         entry->res);
 708         } else {
 709                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
 710                        dev->name, entry->type);
 711         }
 712         hostap_cmd_queue_free(local, entry, 1);
 713
 714         /* issue next command, if pending */
 715         entry = NULL;
 716         spin_lock(&local->cmdlock);
 717         if (!list_empty(&local->cmd_queue)) {
 718                 entry = list_entry(local->cmd_queue.next,
 719                                    struct hostap_cmd_queue, list);
 720                 if (entry->issuing) {
 721                         /* hfa384x_cmd() has already started issuing this
 722                          * command, so do not start here */
 723                         entry = NULL;
 724                 }
 725                 if (entry)
 726                         atomic_inc(&entry->usecnt);
 727         }
 728         spin_unlock(&local->cmdlock);
 729
 730         if (entry) {
 731                 /* issue next command; if command issuing fails, remove the
 732                  * entry from cmd_queue */
 733                 int res = hfa384x_cmd_issue(dev, entry);
 734                 spin_lock(&local->cmdlock);
 735                 __hostap_cmd_queue_free(local, entry, res);
 736                 spin_unlock(&local->cmdlock);
 737         }
 738 }
 739
 740
 741 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
 742 {
 743         int tries = HFA384X_BAP_BUSY_TIMEOUT;
 744         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 745
 746         while (res && tries > 0) {
 747                 tries--;
 748                 udelay(1);
 749                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 750         }
 751         return res;
 752 }
 753
 754
 755 /* Offset must be even */
 756 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
 757                              int offset)
 758 {
 759         u16 o_off, s_off;
 760         int ret = 0;
 761
 762         if (offset % 2 || bap > 1)
 763                 return -EINVAL;
 764
 765         if (bap == BAP1) {
 766                 o_off = HFA384X_OFFSET1_OFF;
 767                 s_off = HFA384X_SELECT1_OFF;
 768         } else {
 769                 o_off = HFA384X_OFFSET0_OFF;
 770                 s_off = HFA384X_SELECT0_OFF;
 771         }
 772
 773         if (hfa384x_wait_offset(dev, o_off)) {
 774                 prism2_io_debug_error(dev, 7);
 775                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
 776                        dev->name);
 777                 ret = -ETIMEDOUT;
 778                 goto out;
 779         }
 780
 781         HFA384X_OUTW(id, s_off);
 782         HFA384X_OUTW(offset, o_off);
 783
 784         if (hfa384x_wait_offset(dev, o_off)) {
 785                 prism2_io_debug_error(dev, 8);
 786                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
 787                        dev->name);
 788                 ret = -ETIMEDOUT;
 789                 goto out;
 790         }
 791 #ifndef final_version
 792         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
 793                 prism2_io_debug_error(dev, 9);
 794                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
 795                        "(%d,0x04%x,%d); reg=0x%04x\n",
 796                        dev->name, bap, id, offset, HFA384X_INW(o_off));
 797                 ret = -EINVAL;
 798         }
 799 #endif
 800
 801  out:
 802         return ret;
 803 }
 804
 805
 806 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
 807                            int exact_len)
 808 {
 809         struct hostap_interface *iface;
 810         local_info_t *local;
 811         int res, rlen = 0;
 812         struct hfa384x_rid_hdr rec;
 813
 814         iface = netdev_priv(dev);
 815         local = iface->local;
 816
 817         if (local->no_pri) {
 818                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
 819                        "f/w\n", dev->name, rid, len);
 820                 return -ENOTTY; /* Well.. not really correct, but return
 821                                  * something unique enough.. */
 822         }
 823
 824         if ((local->func->card_present && !local->func->card_present(local)) ||
 825             local->hw_downloading)
 826                 return -ENODEV;
 827
 828         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 829         if (res)
 830                 return res;
 831
 832         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
 833         if (res) {
 834                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
 835                        "(res=%d, rid=%04x, len=%d)\n",
 836                        dev->name, res, rid, len);
 837                 mutex_unlock(&local->rid_bap_mtx);
 838                 return res;
 839         }
 840
 841         spin_lock_bh(&local->baplock);
 842
 843         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 844         if (!res)
 845                 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
 846
 847         if (le16_to_cpu(rec.len) == 0) {
 848                 /* RID not available */
 849                 res = -ENODATA;
 850         }
 851
 852         rlen = (le16_to_cpu(rec.len) - 1) * 2;
 853         if (!res && exact_len && rlen != len) {
 854                 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
 855                        "rid=0x%04x, len=%d (expected %d)\n",
 856                        dev->name, rid, rlen, len);
 857                 res = -ENODATA;
 858         }
 859
 860         if (!res)
 861                 res = hfa384x_from_bap(dev, BAP0, buf, len);
 862
 863         spin_unlock_bh(&local->baplock);
 864         mutex_unlock(&local->rid_bap_mtx);
 865
 866         if (res) {
 867                 if (res != -ENODATA)
 868                         printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
 869                                "len=%d) - failed - res=%d\n", dev->name, rid,
 870                                len, res);
 871                 if (res == -ETIMEDOUT)
 872                         prism2_hw_reset(dev);
 873                 return res;
 874         }
 875
 876         return rlen;
 877 }
 878
 879
 880 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
 881 {
 882         struct hostap_interface *iface;
 883         local_info_t *local;
 884         struct hfa384x_rid_hdr rec;
 885         int res;
 886
 887         iface = netdev_priv(dev);
 888         local = iface->local;
 889
 890         if (local->no_pri) {
 891                 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
 892                        "f/w\n", dev->name, rid, len);
 893                 return -ENOTTY; /* Well.. not really correct, but return
 894                                  * something unique enough.. */
 895         }
 896
 897         if ((local->func->card_present && !local->func->card_present(local)) ||
 898             local->hw_downloading)
 899                 return -ENODEV;
 900
 901         rec.rid = cpu_to_le16(rid);
 902         /* RID len in words and +1 for rec.rid */
 903         rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
 904
 905         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 906         if (res)
 907                 return res;
 908
 909         spin_lock_bh(&local->baplock);
 910         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 911         if (!res)
 912                 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
 913         if (!res)
 914                 res = hfa384x_to_bap(dev, BAP0, buf, len);
 915         spin_unlock_bh(&local->baplock);
 916
 917         if (res) {
 918                 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
 919                        "failed - res=%d\n", dev->name, rid, len, res);
 920                 mutex_unlock(&local->rid_bap_mtx);
 921                 return res;
 922         }
 923
 924         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
 925         mutex_unlock(&local->rid_bap_mtx);
 926
 927         if (res) {
 928                 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
 929                        "failed (res=%d, rid=%04x, len=%d)\n",
 930                        dev->name, res, rid, len);
 931
 932                 if (res == -ETIMEDOUT)
 933                         prism2_hw_reset(dev);
 934         }
 935
 936         return res;
 937 }
 938
 939
 940 static void hfa384x_disable_interrupts(struct net_device *dev)
 941 {
 942         /* disable interrupts and clear event status */
 943         HFA384X_OUTW(0, HFA384X_INTEN_OFF);
 944         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 945 }
 946
 947
 948 static void hfa384x_enable_interrupts(struct net_device *dev)
 949 {
 950         /* ack pending events and enable interrupts from selected events */
 951         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 952         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 953 }
 954
 955
 956 static void hfa384x_events_no_bap0(struct net_device *dev)
 957 {
 958         HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
 959                      HFA384X_INTEN_OFF);
 960 }
 961
 962
 963 static void hfa384x_events_all(struct net_device *dev)
 964 {
 965         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 966 }
 967
 968
 969 static void hfa384x_events_only_cmd(struct net_device *dev)
 970 {
 971         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
 972 }
 973
 974
 975 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
 976 {
 977         u16 fid;
 978         unsigned long delay;
 979
 980         /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
 981          * below would be handled like CmdCompl event (sleep here, wake up from
 982          * interrupt handler */
 983         if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
 984                 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
 985                        dev->name, len);
 986                 return 0xffff;
 987         }
 988
 989         delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
 990         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
 991                time_before(jiffies, delay))
 992                 yield();
 993         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
 994                 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
 995                 return 0xffff;
 996         }
 997
 998         fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
 999         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1000
1001         return fid;
1002 }
1003
1004
1005 static int prism2_reset_port(struct net_device *dev)
1006 {
1007         struct hostap_interface *iface;
1008         local_info_t *local;
1009         int res;
1010
1011         iface = netdev_priv(dev);
1012         local = iface->local;
1013
1014         if (!local->dev_enabled)
1015                 return 0;
1016
1017         res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1018                           NULL, NULL);
1019         if (res)
1020                 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1021                        dev->name);
1022         else {
1023                 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1024                                   NULL, NULL);
1025                 if (res)
1026                         printk(KERN_DEBUG "%s: reset port failed to enable "
1027                                "port\n", dev->name);
1028         }
1029
1030         /* It looks like at least some STA firmware versions reset
1031          * fragmentation threshold back to 2346 after enable command. Restore
1032          * the configured value, if it differs from this default. */
1033         if (local->fragm_threshold != 2346 &&
1034             hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1035                             local->fragm_threshold)) {
1036                 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1037                        "threshold (%d) after Port0 enable\n",
1038                        dev->name, local->fragm_threshold);
1039         }
1040
1041         /* Some firmwares lose antenna selection settings on reset */
1042         (void) hostap_set_antsel(local);
1043
1044         return res;
1045 }
1046
1047
1048 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1049                                    const char *txt)
1050 {
1051         struct hfa384x_comp_ident comp;
1052         struct hostap_interface *iface;
1053         local_info_t *local;
1054
1055         iface = netdev_priv(dev);
1056         local = iface->local;
1057
1058         if (local->no_pri) {
1059                 /* PRI f/w not yet available - cannot read RIDs */
1060                 return -1;
1061         }
1062         if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1063                 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1064                 return -1;
1065         }
1066
1067         printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1068                __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1069                __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1070         return 0;
1071 }
1072
1073
1074 static int prism2_setup_rids(struct net_device *dev)
1075 {
1076         struct hostap_interface *iface;
1077         local_info_t *local;
1078         u16 tmp;
1079         int ret = 0;
1080
1081         iface = netdev_priv(dev);
1082         local = iface->local;
1083
1084         hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1085
1086         if (!local->fw_ap) {
1087                 tmp = hostap_get_porttype(local);
1088                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp);
1089                 if (ret) {
1090                         printk("%s: Port type setting to %d failed\n",
1091                                dev->name, tmp);
1092                         goto fail;
1093                 }
1094         }
1095
1096         /* Setting SSID to empty string seems to kill the card in Host AP mode
1097          */
1098         if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1099                 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1100                                         local->essid);
1101                 if (ret) {
1102                         printk("%s: AP own SSID setting failed\n", dev->name);
1103                         goto fail;
1104                 }
1105         }
1106
1107         ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1108                               PRISM2_DATA_MAXLEN);
1109         if (ret) {
1110                 printk("%s: MAC data length setting to %d failed\n",
1111                        dev->name, PRISM2_DATA_MAXLEN);
1112                 goto fail;
1113         }
1114
1115         if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1116                 printk("%s: Channel list read failed\n", dev->name);
1117                 ret = -EINVAL;
1118                 goto fail;
1119         }
1120         local->channel_mask = __le16_to_cpu(tmp);
1121
1122         if (local->channel < 1 || local->channel > 14 ||
1123             !(local->channel_mask & (1 << (local->channel - 1)))) {
1124                 printk(KERN_WARNING "%s: Channel setting out of range "
1125                        "(%d)!\n", dev->name, local->channel);
1126                 ret = -EBUSY;
1127                 goto fail;
1128         }
1129
1130         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1131         if (ret) {
1132                 printk("%s: Channel setting to %d failed\n",
1133                        dev->name, local->channel);
1134                 goto fail;
1135         }
1136
1137         ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1138                               local->beacon_int);
1139         if (ret) {
1140                 printk("%s: Beacon interval setting to %d failed\n",
1141                        dev->name, local->beacon_int);
1142                 /* this may fail with Symbol/Lucent firmware */
1143                 if (ret == -ETIMEDOUT)
1144                         goto fail;
1145         }
1146
1147         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1148                               local->dtim_period);
1149         if (ret) {
1150                 printk("%s: DTIM period setting to %d failed\n",
1151                        dev->name, local->dtim_period);
1152                 /* this may fail with Symbol/Lucent firmware */
1153                 if (ret == -ETIMEDOUT)
1154                         goto fail;
1155         }
1156
1157         ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1158                               local->is_promisc);
1159         if (ret)
1160                 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1161                        dev->name, local->is_promisc);
1162
1163         if (!local->fw_ap) {
1164                 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1165                                         local->essid);
1166                 if (ret) {
1167                         printk("%s: Desired SSID setting failed\n", dev->name);
1168                         goto fail;
1169                 }
1170         }
1171
1172         /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1173          * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1174          * rates */
1175         if (local->tx_rate_control == 0) {
1176                 local->tx_rate_control =
1177                         HFA384X_RATES_1MBPS |
1178                         HFA384X_RATES_2MBPS |
1179                         HFA384X_RATES_5MBPS |
1180                         HFA384X_RATES_11MBPS;
1181         }
1182         if (local->basic_rates == 0)
1183                 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1184
1185         if (!local->fw_ap) {
1186                 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1187                                       local->tx_rate_control);
1188                 if (ret) {
1189                         printk("%s: TXRateControl setting to %d failed\n",
1190                                dev->name, local->tx_rate_control);
1191                         goto fail;
1192                 }
1193
1194                 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1195                                       local->tx_rate_control);
1196                 if (ret) {
1197                         printk("%s: cnfSupportedRates setting to %d failed\n",
1198                                dev->name, local->tx_rate_control);
1199                 }
1200
1201                 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1202                                       local->basic_rates);
1203                 if (ret) {
1204                         printk("%s: cnfBasicRates setting to %d failed\n",
1205                                dev->name, local->basic_rates);
1206                 }
1207
1208                 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1209                 if (ret) {
1210                         printk("%s: Create IBSS setting to 1 failed\n",
1211                                dev->name);
1212                 }
1213         }
1214
1215         if (local->name_set)
1216                 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1217                                          local->name);
1218
1219         if (hostap_set_encryption(local)) {
1220                 printk(KERN_INFO "%s: could not configure encryption\n",
1221                        dev->name);
1222         }
1223
1224         (void) hostap_set_antsel(local);
1225
1226         if (hostap_set_roaming(local)) {
1227                 printk(KERN_INFO "%s: could not set host roaming\n",
1228                        dev->name);
1229         }
1230
1231         if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1232             hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1233                 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1234                        dev->name, local->enh_sec);
1235
1236         /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1237          * not working correctly (last seven counters report bogus values).
1238          * This has been fixed in 0.8.2, so enable 32-bit tallies only
1239          * beginning with that firmware version. Another bug fix for 32-bit
1240          * tallies in 1.4.0; should 16-bit tallies be used for some other
1241          * versions, too? */
1242         if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1243                 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1244                         printk(KERN_INFO "%s: cnfThirty2Tally setting "
1245                                "failed\n", dev->name);
1246                         local->tallies32 = 0;
1247                 } else
1248                         local->tallies32 = 1;
1249         } else
1250                 local->tallies32 = 0;
1251
1252         hostap_set_auth_algs(local);
1253
1254         if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1255                             local->fragm_threshold)) {
1256                 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1257                        "failed\n", dev->name, local->fragm_threshold);
1258         }
1259
1260         if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1261                             local->rts_threshold)) {
1262                 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1263                        dev->name, local->rts_threshold);
1264         }
1265
1266         if (local->manual_retry_count >= 0 &&
1267             hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1268                             local->manual_retry_count)) {
1269                 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1270                        dev->name, local->manual_retry_count);
1271         }
1272
1273         if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1274             hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1275                 local->rssi_to_dBm = le16_to_cpu(tmp);
1276         }
1277
1278         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1279             hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1280                 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1281                        dev->name);
1282         }
1283
1284         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1285             hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1286                             local->generic_elem, local->generic_elem_len)) {
1287                 printk(KERN_INFO "%s: setting genericElement failed\n",
1288                        dev->name);
1289         }
1290
1291  fail:
1292         return ret;
1293 }
1294
1295
1296 static int prism2_hw_init(struct net_device *dev, int initial)
1297 {
1298         struct hostap_interface *iface;
1299         local_info_t *local;
1300         int ret, first = 1;
1301         unsigned long start, delay;
1302
1303         PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1304
1305         iface = netdev_priv(dev);
1306         local = iface->local;
1307
1308         clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1309
1310  init:
1311         /* initialize HFA 384x */
1312         ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1313         if (ret) {
1314                 printk(KERN_INFO "%s: first command failed - assuming card "
1315                        "does not have primary firmware\n", dev_info);
1316         }
1317
1318         if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1319                 /* EvStat has Cmd bit set in some cases, so retry once if no
1320                  * wait was needed */
1321                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1322                 printk(KERN_DEBUG "%s: init command completed too quickly - "
1323                        "retrying\n", dev->name);
1324                 first = 0;
1325                 goto init;
1326         }
1327
1328         start = jiffies;
1329         delay = jiffies + HFA384X_INIT_TIMEOUT;
1330         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1331                time_before(jiffies, delay))
1332                 yield();
1333         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1334                 printk(KERN_DEBUG "%s: assuming no Primary image in "
1335                        "flash - card initialization not completed\n",
1336                        dev_info);
1337                 local->no_pri = 1;
1338 #ifdef PRISM2_DOWNLOAD_SUPPORT
1339                         if (local->sram_type == -1)
1340                                 local->sram_type = prism2_get_ram_size(local);
1341 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1342                 return 1;
1343         }
1344         local->no_pri = 0;
1345         printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1346                (jiffies - start) * 1000 / HZ);
1347         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1348         return 0;
1349 }
1350
1351
1352 static int prism2_hw_init2(struct net_device *dev, int initial)
1353 {
1354         struct hostap_interface *iface;
1355         local_info_t *local;
1356         int i;
1357
1358         iface = netdev_priv(dev);
1359         local = iface->local;
1360
1361 #ifdef PRISM2_DOWNLOAD_SUPPORT
1362         kfree(local->pda);
1363         if (local->no_pri)
1364                 local->pda = NULL;
1365         else
1366                 local->pda = prism2_read_pda(dev);
1367 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1368
1369         hfa384x_disable_interrupts(dev);
1370
1371 #ifndef final_version
1372         HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1373         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1374                 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1375                        HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1376                 goto failed;
1377         }
1378 #endif
1379
1380         if (initial || local->pri_only) {
1381                 hfa384x_events_only_cmd(dev);
1382                 /* get card version information */
1383                 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1384                     prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1385                         hfa384x_disable_interrupts(dev);
1386                         goto failed;
1387                 }
1388
1389                 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1390                         printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1391                                "- only Primary f/w present\n", dev->name);
1392                         local->pri_only = 1;
1393                         return 0;
1394                 }
1395                 local->pri_only = 0;
1396                 hfa384x_disable_interrupts(dev);
1397         }
1398
1399         /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1400          * enable interrupts before this. This would also require some sort of
1401          * sleeping AllocEv waiting */
1402
1403         /* allocate TX FIDs */
1404         local->txfid_len = PRISM2_TXFID_LEN;
1405         for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1406                 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1407                 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1408                         local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1409                         if (local->txfid[i] != 0xffff) {
1410                                 printk(KERN_DEBUG "%s: Using shorter TX FID "
1411                                        "(1600 bytes)\n", dev->name);
1412                                 local->txfid_len = 1600;
1413                         }
1414                 }
1415                 if (local->txfid[i] == 0xffff)
1416                         goto failed;
1417                 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1418         }
1419
1420         hfa384x_events_only_cmd(dev);
1421
1422         if (initial) {
1423                 struct list_head *ptr;
1424                 prism2_check_sta_fw_version(local);
1425
1426                 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1427                                     &dev->dev_addr, 6, 1) < 0) {
1428                         printk("%s: could not get own MAC address\n",
1429                                dev->name);
1430                 }
1431                 list_for_each(ptr, &local->hostap_interfaces) {
1432                         iface = list_entry(ptr, struct hostap_interface, list);
1433                         memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1434                 }
1435         } else if (local->fw_ap)
1436                 prism2_check_sta_fw_version(local);
1437
1438         prism2_setup_rids(dev);
1439
1440         /* MAC is now configured, but port 0 is not yet enabled */
1441         return 0;
1442
1443  failed:
1444         if (!local->no_pri)
1445                 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1446         return 1;
1447 }
1448
1449
1450 static int prism2_hw_enable(struct net_device *dev, int initial)
1451 {
1452         struct hostap_interface *iface;
1453         local_info_t *local;
1454         int was_resetting;
1455
1456         iface = netdev_priv(dev);
1457         local = iface->local;
1458         was_resetting = local->hw_resetting;
1459
1460         if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1461                 printk("%s: MAC port 0 enabling failed\n", dev->name);
1462                 return 1;
1463         }
1464
1465         local->hw_ready = 1;
1466         local->hw_reset_tries = 0;
1467         local->hw_resetting = 0;
1468         hfa384x_enable_interrupts(dev);
1469
1470         /* at least D-Link DWL-650 seems to require additional port reset
1471          * before it starts acting as an AP, so reset port automatically
1472          * here just in case */
1473         if (initial && prism2_reset_port(dev)) {
1474                 printk("%s: MAC port 0 reseting failed\n", dev->name);
1475                 return 1;
1476         }
1477
1478         if (was_resetting && netif_queue_stopped(dev)) {
1479                 /* If hw_reset() was called during pending transmit, netif
1480                  * queue was stopped. Wake it up now since the wlan card has
1481                  * been resetted. */
1482                 netif_wake_queue(dev);
1483         }
1484
1485         return 0;
1486 }
1487
1488
1489 static int prism2_hw_config(struct net_device *dev, int initial)
1490 {
1491         struct hostap_interface *iface;
1492         local_info_t *local;
1493
1494         iface = netdev_priv(dev);
1495         local = iface->local;
1496
1497         if (local->hw_downloading)
1498                 return 1;
1499
1500         if (prism2_hw_init(dev, initial)) {
1501                 return local->no_pri ? 0 : 1;
1502         }
1503
1504         if (prism2_hw_init2(dev, initial))
1505                 return 1;
1506
1507         /* Enable firmware if secondary image is loaded and at least one of the
1508          * netdevices is up. */
1509         if (!local->pri_only &&
1510             (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1511                 if (!local->dev_enabled)
1512                         prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1513                 local->dev_enabled = 1;
1514                 return prism2_hw_enable(dev, initial);
1515         }
1516
1517         return 0;
1518 }
1519
1520
1521 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1522 {
1523         struct hostap_interface *iface;
1524         local_info_t *local;
1525
1526         iface = netdev_priv(dev);
1527         local = iface->local;
1528
1529         /* Allow only command completion events during disable */
1530         hfa384x_events_only_cmd(dev);
1531
1532         local->hw_ready = 0;
1533         if (local->dev_enabled)
1534                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1535         local->dev_enabled = 0;
1536
1537         if (local->func->card_present && !local->func->card_present(local)) {
1538                 printk(KERN_DEBUG "%s: card already removed or not configured "
1539                        "during shutdown\n", dev->name);
1540                 return;
1541         }
1542
1543         if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1544             hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1545                 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1546
1547         hfa384x_disable_interrupts(dev);
1548
1549         if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1550                 hfa384x_events_only_cmd(dev);
1551         else
1552                 prism2_clear_cmd_queue(local);
1553 }
1554
1555
1556 static void prism2_hw_reset(struct net_device *dev)
1557 {
1558         struct hostap_interface *iface;
1559         local_info_t *local;
1560
1561 #if 0
1562         static long last_reset = 0;
1563
1564         /* do not reset card more than once per second to avoid ending up in a
1565          * busy loop reseting the card */
1566         if (time_before_eq(jiffies, last_reset + HZ))
1567                 return;
1568         last_reset = jiffies;
1569 #endif
1570
1571         iface = netdev_priv(dev);
1572         local = iface->local;
1573
1574         if (in_interrupt()) {
1575                 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1576                        "in interrupt context\n", dev->name);
1577                 return;
1578         }
1579
1580         if (local->hw_downloading)
1581                 return;
1582
1583         if (local->hw_resetting) {
1584                 printk(KERN_WARNING "%s: %s: already resetting card - "
1585                        "ignoring reset request\n", dev_info, dev->name);
1586                 return;
1587         }
1588
1589         local->hw_reset_tries++;
1590         if (local->hw_reset_tries > 10) {
1591                 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1592                        dev->name);
1593                 return;
1594         }
1595
1596         printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1597         hfa384x_disable_interrupts(dev);
1598         local->hw_resetting = 1;
1599         if (local->func->cor_sreset) {
1600                 /* Host system seems to hang in some cases with high traffic
1601                  * load or shared interrupts during COR sreset. Disable shared
1602                  * interrupts during reset to avoid these crashes. COS sreset
1603                  * takes quite a long time, so it is unfortunate that this
1604                  * seems to be needed. Anyway, I do not know of any better way
1605                  * of avoiding the crash. */
1606                 disable_irq(dev->irq);
1607                 local->func->cor_sreset(local);
1608                 enable_irq(dev->irq);
1609         }
1610         prism2_hw_shutdown(dev, 1);
1611         prism2_hw_config(dev, 0);
1612         local->hw_resetting = 0;
1613
1614 #ifdef PRISM2_DOWNLOAD_SUPPORT
1615         if (local->dl_pri) {
1616                 printk(KERN_DEBUG "%s: persistent download of primary "
1617                        "firmware\n", dev->name);
1618                 if (prism2_download_genesis(local, local->dl_pri) < 0)
1619                         printk(KERN_WARNING "%s: download (PRI) failed\n",
1620                                dev->name);
1621         }
1622
1623         if (local->dl_sec) {
1624                 printk(KERN_DEBUG "%s: persistent download of secondary "
1625                        "firmware\n", dev->name);
1626                 if (prism2_download_volatile(local, local->dl_sec) < 0)
1627                         printk(KERN_WARNING "%s: download (SEC) failed\n",
1628                                dev->name);
1629         }
1630 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1631
1632         /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1633 }
1634
1635
1636 static void prism2_schedule_reset(local_info_t *local)
1637 {
1638         schedule_work(&local->reset_queue);
1639 }
1640
1641
1642 /* Called only as scheduled task after noticing card timeout in interrupt
1643  * context */
1644 static void handle_reset_queue(struct work_struct *work)
1645 {
1646         local_info_t *local = container_of(work, local_info_t, reset_queue);
1647
1648         printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1649         prism2_hw_reset(local->dev);
1650
1651         if (netif_queue_stopped(local->dev)) {
1652                 int i;
1653
1654                 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1655                         if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1656                                 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1657                                        "wake up queue\n");
1658                                 netif_wake_queue(local->dev);
1659                                 break;
1660                         }
1661         }
1662 }
1663
1664
1665 static int prism2_get_txfid_idx(local_info_t *local)
1666 {
1667         int idx, end;
1668         unsigned long flags;
1669
1670         spin_lock_irqsave(&local->txfidlock, flags);
1671         end = idx = local->next_txfid;
1672         do {
1673                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1674                         local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1675                         spin_unlock_irqrestore(&local->txfidlock, flags);
1676                         return idx;
1677                 }
1678                 idx++;
1679                 if (idx >= PRISM2_TXFID_COUNT)
1680                         idx = 0;
1681         } while (idx != end);
1682         spin_unlock_irqrestore(&local->txfidlock, flags);
1683
1684         PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1685                "packet dropped\n");
1686         local->stats.tx_dropped++;
1687
1688         return -1;
1689 }
1690
1691
1692 /* Called only from hardware IRQ */
1693 static void prism2_transmit_cb(struct net_device *dev, long context,
1694                                u16 resp0, u16 res)
1695 {
1696         struct hostap_interface *iface;
1697         local_info_t *local;
1698         int idx = (int) context;
1699
1700         iface = netdev_priv(dev);
1701         local = iface->local;
1702
1703         if (res) {
1704                 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1705                        dev->name, res);
1706                 return;
1707         }
1708
1709         if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1710                 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1711                        "idx=%d\n", dev->name, idx);
1712                 return;
1713         }
1714
1715         if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1716                 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1717                        "with no pending transmit\n", dev->name);
1718         }
1719
1720         if (netif_queue_stopped(dev)) {
1721                 /* ready for next TX, so wake up queue that was stopped in
1722                  * prism2_transmit() */
1723                 netif_wake_queue(dev);
1724         }
1725
1726         spin_lock(&local->txfidlock);
1727
1728         /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1729          * will be automatically allocated for the next TX frame */
1730         local->intransmitfid[idx] = resp0;
1731
1732         PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1733                "resp0=0x%04x, transmit_txfid=0x%04x\n",
1734                dev->name, idx, local->txfid[idx],
1735                resp0, local->intransmitfid[local->next_txfid]);
1736
1737         idx++;
1738         if (idx >= PRISM2_TXFID_COUNT)
1739                 idx = 0;
1740         local->next_txfid = idx;
1741
1742         /* check if all TX buffers are occupied */
1743         do {
1744                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1745                         spin_unlock(&local->txfidlock);
1746                         return;
1747                 }
1748                 idx++;
1749                 if (idx >= PRISM2_TXFID_COUNT)
1750                         idx = 0;
1751         } while (idx != local->next_txfid);
1752         spin_unlock(&local->txfidlock);
1753
1754         /* no empty TX buffers, stop queue */
1755         netif_stop_queue(dev);
1756 }
1757
1758
1759 /* Called only from software IRQ if PCI bus master is not used (with bus master
1760  * this can be called both from software and hardware IRQ) */
1761 static int prism2_transmit(struct net_device *dev, int idx)
1762 {
1763         struct hostap_interface *iface;
1764         local_info_t *local;
1765         int res;
1766
1767         iface = netdev_priv(dev);
1768         local = iface->local;
1769
1770         /* The driver tries to stop netif queue so that there would not be
1771          * more than one attempt to transmit frames going on; check that this
1772          * is really the case */
1773
1774         if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1775                 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1776                        "when previous TX was pending\n", dev->name);
1777                 return -1;
1778         }
1779
1780         /* stop the queue for the time that transmit is pending */
1781         netif_stop_queue(dev);
1782
1783         /* transmit packet */
1784         res = hfa384x_cmd_callback(
1785                 dev,
1786                 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1787                 local->txfid[idx],
1788                 prism2_transmit_cb, (long) idx);
1789
1790         if (res) {
1791                 struct net_device_stats *stats;
1792                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1793                        "failed (res=%d)\n", dev->name, res);
1794                 stats = hostap_get_stats(dev);
1795                 stats->tx_dropped++;
1796                 netif_wake_queue(dev);
1797                 return -1;
1798         }
1799         dev->trans_start = jiffies;
1800
1801         /* Since we did not wait for command completion, the card continues
1802          * to process on the background and we will finish handling when
1803          * command completion event is handled (prism2_cmd_ev() function) */
1804
1805         return 0;
1806 }
1807
1808
1809 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1810  * send the payload with this descriptor) */
1811 /* Called only from software IRQ */
1812 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1813 {
1814         struct hostap_interface *iface;
1815         local_info_t *local;
1816         struct hfa384x_tx_frame txdesc;
1817         struct hostap_skb_tx_data *meta;
1818         int hdr_len, data_len, idx, res, ret = -1;
1819         u16 tx_control, fc;
1820
1821         iface = netdev_priv(dev);
1822         local = iface->local;
1823
1824         meta = (struct hostap_skb_tx_data *) skb->cb;
1825
1826         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1827
1828         if ((local->func->card_present && !local->func->card_present(local)) ||
1829             !local->hw_ready || local->hw_downloading || local->pri_only) {
1830                 if (net_ratelimit()) {
1831                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1832                                " skipping\n", dev->name);
1833                 }
1834                 goto fail;
1835         }
1836
1837         memset(&txdesc, 0, sizeof(txdesc));
1838
1839         /* skb->data starts with txdesc->frame_control */
1840         hdr_len = 24;
1841         skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1842         fc = le16_to_cpu(txdesc.frame_control);
1843         if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
1844             (fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS) &&
1845             skb->len >= 30) {
1846                 /* Addr4 */
1847                 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1848                                                  ETH_ALEN);
1849                 hdr_len += ETH_ALEN;
1850         }
1851
1852         tx_control = local->tx_control;
1853         if (meta->tx_cb_idx) {
1854                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1855                 txdesc.sw_support = cpu_to_le16(meta->tx_cb_idx);
1856         }
1857         txdesc.tx_control = cpu_to_le16(tx_control);
1858         txdesc.tx_rate = meta->rate;
1859
1860         data_len = skb->len - hdr_len;
1861         txdesc.data_len = cpu_to_le16(data_len);
1862         txdesc.len = cpu_to_be16(data_len);
1863
1864         idx = prism2_get_txfid_idx(local);
1865         if (idx < 0)
1866                 goto fail;
1867
1868         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1869                 hostap_dump_tx_header(dev->name, &txdesc);
1870
1871         spin_lock(&local->baplock);
1872         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1873
1874         if (!res)
1875                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1876         if (!res)
1877                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1878                                      skb->len - hdr_len);
1879         spin_unlock(&local->baplock);
1880
1881         if (!res)
1882                 res = prism2_transmit(dev, idx);
1883         if (res) {
1884                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1885                        dev->name);
1886                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1887                 schedule_work(&local->reset_queue);
1888                 goto fail;
1889         }
1890
1891         ret = 0;
1892
1893 fail:
1894         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1895         return ret;
1896 }
1897
1898
1899 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1900  * register has changed values between consecutive reads for an unknown reason.
1901  * This should really not happen, so more debugging is needed. This test
1902  * version is a big slower, but it will detect most of such register changes
1903  * and will try to get the correct fid eventually. */
1904 #define EXTRA_FID_READ_TESTS
1905
1906 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1907 {
1908 #ifdef EXTRA_FID_READ_TESTS
1909         u16 val, val2, val3;
1910         int i;
1911
1912         for (i = 0; i < 10; i++) {
1913                 val = HFA384X_INW(reg);
1914                 val2 = HFA384X_INW(reg);
1915                 val3 = HFA384X_INW(reg);
1916
1917                 if (val == val2 && val == val3)
1918                         return val;
1919
1920                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1921                        " %04x %04x %04x\n",
1922                        dev->name, i, reg, val, val2, val3);
1923                 if ((val == val2 || val == val3) && val != 0)
1924                         return val;
1925                 if (val2 == val3 && val2 != 0)
1926                         return val2;
1927         }
1928         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1929                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1930         return val;
1931 #else /* EXTRA_FID_READ_TESTS */
1932         return HFA384X_INW(reg);
1933 #endif /* EXTRA_FID_READ_TESTS */
1934 }
1935
1936
1937 /* Called only as a tasklet (software IRQ) */
1938 static void prism2_rx(local_info_t *local)
1939 {
1940         struct net_device *dev = local->dev;
1941         int res, rx_pending = 0;
1942         u16 len, hdr_len, rxfid, status, macport;
1943         struct net_device_stats *stats;
1944         struct hfa384x_rx_frame rxdesc;
1945         struct sk_buff *skb = NULL;
1946
1947         prism2_callback(local, PRISM2_CALLBACK_RX_START);
1948         stats = hostap_get_stats(dev);
1949
1950         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1951 #ifndef final_version
1952         if (rxfid == 0) {
1953                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1954                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1955                        rxfid);
1956                 if (rxfid == 0) {
1957                         schedule_work(&local->reset_queue);
1958                         goto rx_dropped;
1959                 }
1960                 /* try to continue with the new rxfid value */
1961         }
1962 #endif
1963
1964         spin_lock(&local->baplock);
1965         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1966         if (!res)
1967                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1968
1969         if (res) {
1970                 spin_unlock(&local->baplock);
1971                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1972                        res);
1973                 if (res == -ETIMEDOUT) {
1974                         schedule_work(&local->reset_queue);
1975                 }
1976                 goto rx_dropped;
1977         }
1978
1979         len = le16_to_cpu(rxdesc.data_len);
1980         hdr_len = sizeof(rxdesc);
1981         status = le16_to_cpu(rxdesc.status);
1982         macport = (status >> 8) & 0x07;
1983
1984         /* Drop frames with too large reported payload length. Monitor mode
1985          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1986          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1987          * macport 7 */
1988         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1989                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1990                         if (len >= (u16) -14) {
1991                                 hdr_len -= 65535 - len;
1992                                 hdr_len--;
1993                         }
1994                         len = 0;
1995                 } else {
1996                         spin_unlock(&local->baplock);
1997                         printk(KERN_DEBUG "%s: Received frame with invalid "
1998                                "length 0x%04x\n", dev->name, len);
1999                         hostap_dump_rx_header(dev->name, &rxdesc);
2000                         goto rx_dropped;
2001                 }
2002         }
2003
2004         skb = dev_alloc_skb(len + hdr_len);
2005         if (!skb) {
2006                 spin_unlock(&local->baplock);
2007                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2008                        dev->name);
2009                 goto rx_dropped;
2010         }
2011         skb->dev = dev;
2012         memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2013
2014         if (len > 0)
2015                 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2016         spin_unlock(&local->baplock);
2017         if (res) {
2018                 printk(KERN_DEBUG "%s: RX failed to read "
2019                        "frame data\n", dev->name);
2020                 goto rx_dropped;
2021         }
2022
2023         skb_queue_tail(&local->rx_list, skb);
2024         tasklet_schedule(&local->rx_tasklet);
2025
2026  rx_exit:
2027         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2028         if (!rx_pending) {
2029                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2030         }
2031
2032         return;
2033
2034  rx_dropped:
2035         stats->rx_dropped++;
2036         if (skb)
2037                 dev_kfree_skb(skb);
2038         goto rx_exit;
2039 }
2040
2041
2042 /* Called only as a tasklet (software IRQ) */
2043 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2044 {
2045         struct hfa384x_rx_frame *rxdesc;
2046         struct net_device *dev = skb->dev;
2047         struct hostap_80211_rx_status stats;
2048         int hdrlen, rx_hdrlen;
2049
2050         rx_hdrlen = sizeof(*rxdesc);
2051         if (skb->len < sizeof(*rxdesc)) {
2052                 /* Allow monitor mode to receive shorter frames */
2053                 if (local->iw_mode == IW_MODE_MONITOR &&
2054                     skb->len >= sizeof(*rxdesc) - 30) {
2055                         rx_hdrlen = skb->len;
2056                 } else {
2057                         dev_kfree_skb(skb);
2058                         return;
2059                 }
2060         }
2061
2062         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2063
2064         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2065             skb->len >= sizeof(*rxdesc))
2066                 hostap_dump_rx_header(dev->name, rxdesc);
2067
2068         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2069             (!local->monitor_allow_fcserr ||
2070              local->iw_mode != IW_MODE_MONITOR))
2071                 goto drop;
2072
2073         if (skb->len > PRISM2_DATA_MAXLEN) {
2074                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2075                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2076                 goto drop;
2077         }
2078
2079         stats.mac_time = le32_to_cpu(rxdesc->time);
2080         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2081         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2082         stats.rate = rxdesc->rate;
2083
2084         /* Convert Prism2 RX structure into IEEE 802.11 header */
2085         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(rxdesc->frame_control));
2086         if (hdrlen > rx_hdrlen)
2087                 hdrlen = rx_hdrlen;
2088
2089         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2090                 &rxdesc->frame_control, hdrlen);
2091
2092         hostap_80211_rx(dev, skb, &stats);
2093         return;
2094
2095  drop:
2096         dev_kfree_skb(skb);
2097 }
2098
2099
2100 /* Called only as a tasklet (software IRQ) */
2101 static void hostap_rx_tasklet(unsigned long data)
2102 {
2103         local_info_t *local = (local_info_t *) data;
2104         struct sk_buff *skb;
2105
2106         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2107                 hostap_rx_skb(local, skb);
2108 }
2109
2110
2111 /* Called only from hardware IRQ */
2112 static void prism2_alloc_ev(struct net_device *dev)
2113 {
2114         struct hostap_interface *iface;
2115         local_info_t *local;
2116         int idx;
2117         u16 fid;
2118
2119         iface = netdev_priv(dev);
2120         local = iface->local;
2121
2122         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2123
2124         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2125
2126         spin_lock(&local->txfidlock);
2127         idx = local->next_alloc;
2128
2129         do {
2130                 if (local->txfid[idx] == fid) {
2131                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2132                                idx);
2133
2134 #ifndef final_version
2135                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2136                                 printk("Already released txfid found at idx "
2137                                        "%d\n", idx);
2138                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2139                                 printk("Already reserved txfid found at idx "
2140                                        "%d\n", idx);
2141 #endif
2142                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2143                         idx++;
2144                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2145                                 idx;
2146
2147                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2148                             netif_queue_stopped(dev))
2149                                 netif_wake_queue(dev);
2150
2151                         spin_unlock(&local->txfidlock);
2152                         return;
2153                 }
2154
2155                 idx++;
2156                 if (idx >= PRISM2_TXFID_COUNT)
2157                         idx = 0;
2158         } while (idx != local->next_alloc);
2159
2160         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2161                "read 0x%04x) for alloc event\n", dev->name, fid,
2162                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2163         printk(KERN_DEBUG "TXFIDs:");
2164         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2165                 printk(" %04x[%04x]", local->txfid[idx],
2166                        local->intransmitfid[idx]);
2167         printk("\n");
2168         spin_unlock(&local->txfidlock);
2169
2170         /* FIX: should probably schedule reset; reference to one txfid was lost
2171          * completely.. Bad things will happen if we run out of txfids
2172          * Actually, this will cause netdev watchdog to notice TX timeout and
2173          * then card reset after all txfids have been leaked. */
2174 }
2175
2176
2177 /* Called only as a tasklet (software IRQ) */
2178 static void hostap_tx_callback(local_info_t *local,
2179                                struct hfa384x_tx_frame *txdesc, int ok,
2180                                char *payload)
2181 {
2182         u16 sw_support, hdrlen, len;
2183         struct sk_buff *skb;
2184         struct hostap_tx_callback_info *cb;
2185
2186         /* Make sure that frame was from us. */
2187         if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2188                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2189                        local->dev->name);
2190                 return;
2191         }
2192
2193         sw_support = le16_to_cpu(txdesc->sw_support);
2194
2195         spin_lock(&local->lock);
2196         cb = local->tx_callback;
2197         while (cb != NULL && cb->idx != sw_support)
2198                 cb = cb->next;
2199         spin_unlock(&local->lock);
2200
2201         if (cb == NULL) {
2202                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2203                        local->dev->name, sw_support);
2204                 return;
2205         }
2206
2207         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(txdesc->frame_control));
2208         len = le16_to_cpu(txdesc->data_len);
2209         skb = dev_alloc_skb(hdrlen + len);
2210         if (skb == NULL) {
2211                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2212                        "skb\n", local->dev->name);
2213                 return;
2214         }
2215
2216         memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2217         if (payload)
2218                 memcpy(skb_put(skb, len), payload, len);
2219
2220         skb->dev = local->dev;
2221         skb_reset_mac_header(skb);
2222
2223         cb->func(skb, ok, cb->data);
2224 }
2225
2226
2227 /* Called only as a tasklet (software IRQ) */
2228 static int hostap_tx_compl_read(local_info_t *local, int error,
2229                                 struct hfa384x_tx_frame *txdesc,
2230                                 char **payload)
2231 {
2232         u16 fid, len;
2233         int res, ret = 0;
2234         struct net_device *dev = local->dev;
2235
2236         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2237
2238         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2239
2240         spin_lock(&local->baplock);
2241         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2242         if (!res)
2243                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2244         if (res) {
2245                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2246                        "read txdesc\n", dev->name, error, fid);
2247                 if (res == -ETIMEDOUT) {
2248                         schedule_work(&local->reset_queue);
2249                 }
2250                 ret = -1;
2251                 goto fail;
2252         }
2253         if (txdesc->sw_support) {
2254                 len = le16_to_cpu(txdesc->data_len);
2255                 if (len < PRISM2_DATA_MAXLEN) {
2256                         *payload = kmalloc(len, GFP_ATOMIC);
2257                         if (*payload == NULL ||
2258                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2259                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2260                                        "frame payload\n", dev->name);
2261                                 kfree(*payload);
2262                                 *payload = NULL;
2263                                 ret = -1;
2264                                 goto fail;
2265                         }
2266                 }
2267         }
2268
2269  fail:
2270         spin_unlock(&local->baplock);
2271
2272         return ret;
2273 }
2274
2275
2276 /* Called only as a tasklet (software IRQ) */
2277 static void prism2_tx_ev(local_info_t *local)
2278 {
2279         struct net_device *dev = local->dev;
2280         char *payload = NULL;
2281         struct hfa384x_tx_frame txdesc;
2282
2283         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2284                 goto fail;
2285
2286         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2287                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2288                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2289                        "duration_id=%d\n",
2290                        dev->name, le16_to_cpu(txdesc.status),
2291                        txdesc.retry_count, txdesc.tx_rate,
2292                        le16_to_cpu(txdesc.seq_ctrl),
2293                        le16_to_cpu(txdesc.duration_id));
2294         }
2295
2296         if (txdesc.sw_support)
2297                 hostap_tx_callback(local, &txdesc, 1, payload);
2298         kfree(payload);
2299
2300  fail:
2301         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2302 }
2303
2304
2305 /* Called only as a tasklet (software IRQ) */
2306 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2307 {
2308         local_info_t *local = (local_info_t *) data;
2309         struct sk_buff *skb;
2310
2311         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2312                 struct hfa384x_tx_frame *txdesc =
2313                         (struct hfa384x_tx_frame *) skb->data;
2314
2315                 if (skb->len >= sizeof(*txdesc)) {
2316                         /* Convert Prism2 RX structure into IEEE 802.11 header
2317                          */
2318                         u16 fc = le16_to_cpu(txdesc->frame_control);
2319                         int hdrlen = hostap_80211_get_hdrlen(fc);
2320                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2321                                 &txdesc->frame_control, hdrlen);
2322
2323                         hostap_handle_sta_tx_exc(local, skb);
2324                 }
2325                 dev_kfree_skb(skb);
2326         }
2327 }
2328
2329
2330 /* Called only as a tasklet (software IRQ) */
2331 static void prism2_txexc(local_info_t *local)
2332 {
2333         struct net_device *dev = local->dev;
2334         u16 status, fc;
2335         int show_dump, res;
2336         char *payload = NULL;
2337         struct hfa384x_tx_frame txdesc;
2338
2339         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2340         local->stats.tx_errors++;
2341
2342         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2343         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2344         if (res)
2345                 return;
2346
2347         status = le16_to_cpu(txdesc.status);
2348
2349         /* We produce a TXDROP event only for retry or lifetime
2350          * exceeded, because that's the only status that really mean
2351          * that this particular node went away.
2352          * Other errors means that *we* screwed up. - Jean II */
2353         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2354         {
2355                 union iwreq_data wrqu;
2356
2357                 /* Copy 802.11 dest address. */
2358                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2359                 wrqu.addr.sa_family = ARPHRD_ETHER;
2360                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2361         } else
2362                 show_dump = 1;
2363
2364         if (local->iw_mode == IW_MODE_MASTER ||
2365             local->iw_mode == IW_MODE_REPEAT ||
2366             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2367                 struct sk_buff *skb;
2368                 skb = dev_alloc_skb(sizeof(txdesc));
2369                 if (skb) {
2370                         memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2371                                sizeof(txdesc));
2372                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2373                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2374                 }
2375         }
2376
2377         if (txdesc.sw_support)
2378                 hostap_tx_callback(local, &txdesc, 0, payload);
2379         kfree(payload);
2380
2381         if (!show_dump)
2382                 return;
2383
2384         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2385                " tx_control=%04x\n",
2386                dev->name, status,
2387                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2388                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2389                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2390                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2391                le16_to_cpu(txdesc.tx_control));
2392
2393         fc = le16_to_cpu(txdesc.frame_control);
2394         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2395                "(%s%s%s::%d%s%s)\n",
2396                txdesc.retry_count, txdesc.tx_rate, fc,
2397                WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT ? "Mgmt" : "",
2398                WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL ? "Ctrl" : "",
2399                WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA ? "Data" : "",
2400                WLAN_FC_GET_STYPE(fc) >> 4,
2401                fc & IEEE80211_FCTL_TODS ? " ToDS" : "",
2402                fc & IEEE80211_FCTL_FROMDS ? " FromDS" : "");
2403         PDEBUG(DEBUG_EXTRA, "   A1=" MACSTR " A2=" MACSTR " A3="
2404                MACSTR " A4=" MACSTR "\n",
2405                MAC2STR(txdesc.addr1), MAC2STR(txdesc.addr2),
2406                MAC2STR(txdesc.addr3), MAC2STR(txdesc.addr4));
2407 }
2408
2409
2410 /* Called only as a tasklet (software IRQ) */
2411 static void hostap_info_tasklet(unsigned long data)
2412 {
2413         local_info_t *local = (local_info_t *) data;
2414         struct sk_buff *skb;
2415
2416         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2417                 hostap_info_process(local, skb);
2418                 dev_kfree_skb(skb);
2419         }
2420 }
2421
2422
2423 /* Called only as a tasklet (software IRQ) */
2424 static void prism2_info(local_info_t *local)
2425 {
2426         struct net_device *dev = local->dev;
2427         u16 fid;
2428         int res, left;
2429         struct hfa384x_info_frame info;
2430         struct sk_buff *skb;
2431
2432         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2433
2434         spin_lock(&local->baplock);
2435         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2436         if (!res)
2437                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2438         if (res) {
2439                 spin_unlock(&local->baplock);
2440                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2441                        fid);
2442                 if (res == -ETIMEDOUT) {
2443                         schedule_work(&local->reset_queue);
2444                 }
2445                 goto out;
2446         }
2447
2448         le16_to_cpus(&info.len);
2449         le16_to_cpus(&info.type);
2450         left = (info.len - 1) * 2;
2451
2452         if (info.len & 0x8000 || info.len == 0 || left > 2060) {
2453                 /* data register seems to give 0x8000 in some error cases even
2454                  * though busy bit is not set in offset register;
2455                  * in addition, length must be at least 1 due to type field */
2456                 spin_unlock(&local->baplock);
2457                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2458                        "length 0x%04x (type 0x%04x)\n", dev->name, info.len,
2459                        info.type);
2460                 goto out;
2461         }
2462
2463         skb = dev_alloc_skb(sizeof(info) + left);
2464         if (skb == NULL) {
2465                 spin_unlock(&local->baplock);
2466                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2467                        "frame\n", dev->name);
2468                 goto out;
2469         }
2470
2471         memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
2472         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2473         {
2474                 spin_unlock(&local->baplock);
2475                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2476                        "len=0x%04x, type=0x%04x\n",
2477                        dev->name, fid, info.len, info.type);
2478                 dev_kfree_skb(skb);
2479                 goto out;
2480         }
2481         spin_unlock(&local->baplock);
2482
2483         skb_queue_tail(&local->info_list, skb);
2484         tasklet_schedule(&local->info_tasklet);
2485
2486  out:
2487         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2488 }
2489
2490
2491 /* Called only as a tasklet (software IRQ) */
2492 static void hostap_bap_tasklet(unsigned long data)
2493 {
2494         local_info_t *local = (local_info_t *) data;
2495         struct net_device *dev = local->dev;
2496         u16 ev;
2497         int frames = 30;
2498
2499         if (local->func->card_present && !local->func->card_present(local))
2500                 return;
2501
2502         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2503
2504         /* Process all pending BAP events without generating new interrupts
2505          * for them */
2506         while (frames-- > 0) {
2507                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2508                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2509                         break;
2510                 if (ev & HFA384X_EV_RX)
2511                         prism2_rx(local);
2512                 if (ev & HFA384X_EV_INFO)
2513                         prism2_info(local);
2514                 if (ev & HFA384X_EV_TX)
2515                         prism2_tx_ev(local);
2516                 if (ev & HFA384X_EV_TXEXC)
2517                         prism2_txexc(local);
2518         }
2519
2520         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2521         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2522
2523         /* Enable interrupts for new BAP events */
2524         hfa384x_events_all(dev);
2525         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2526 }
2527
2528
2529 /* Called only from hardware IRQ */
2530 static void prism2_infdrop(struct net_device *dev)
2531 {
2532         static unsigned long last_inquire = 0;
2533
2534         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2535
2536         /* some firmware versions seem to get stuck with
2537          * full CommTallies in high traffic load cases; every
2538          * packet will then cause INFDROP event and CommTallies
2539          * info frame will not be sent automatically. Try to
2540          * get out of this state by inquiring CommTallies. */
2541         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2542                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2543                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2544                 last_inquire = jiffies;
2545         }
2546 }
2547
2548
2549 /* Called only from hardware IRQ */
2550 static void prism2_ev_tick(struct net_device *dev)
2551 {
2552         struct hostap_interface *iface;
2553         local_info_t *local;
2554         u16 evstat, inten;
2555         static int prev_stuck = 0;
2556
2557         iface = netdev_priv(dev);
2558         local = iface->local;
2559
2560         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2561             local->last_tick_timer) {
2562                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2563                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2564                 if (!prev_stuck) {
2565                         printk(KERN_INFO "%s: SW TICK stuck? "
2566                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2567                                dev->name, local->bits, evstat, inten);
2568                 }
2569                 local->sw_tick_stuck++;
2570                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2571                     (inten & HFA384X_BAP0_EVENTS)) {
2572                         printk(KERN_INFO "%s: trying to recover from IRQ "
2573                                "hang\n", dev->name);
2574                         hfa384x_events_no_bap0(dev);
2575                 }
2576                 prev_stuck = 1;
2577         } else
2578                 prev_stuck = 0;
2579 }
2580
2581
2582 /* Called only from hardware IRQ */
2583 static void prism2_check_magic(local_info_t *local)
2584 {
2585         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2586          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2587          * register once or twice seems to get the correct value.. PCI cards
2588          * cannot anyway be removed during normal operation, so there is not
2589          * really any need for this verification with them. */
2590
2591 #ifndef PRISM2_PCI
2592 #ifndef final_version
2593         static unsigned long last_magic_err = 0;
2594         struct net_device *dev = local->dev;
2595
2596         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2597                 if (!local->hw_ready)
2598                         return;
2599                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2600                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2601                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2602                                "%04X != %04X - card removed?\n", dev->name,
2603                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2604                                HFA384X_MAGIC);
2605                         last_magic_err = jiffies;
2606                 } else if (net_ratelimit()) {
2607                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2608                                "MAGIC=%04x\n", dev->name,
2609                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2610                                HFA384X_MAGIC);
2611                 }
2612                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2613                         schedule_work(&local->reset_queue);
2614                 return;
2615         }
2616 #endif /* final_version */
2617 #endif /* !PRISM2_PCI */
2618 }
2619
2620
2621 /* Called only from hardware IRQ */
2622 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2623 {
2624         struct net_device *dev = (struct net_device *) dev_id;
2625         struct hostap_interface *iface;
2626         local_info_t *local;
2627         int events = 0;
2628         u16 ev;
2629
2630         iface = netdev_priv(dev);
2631         local = iface->local;
2632
2633         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2634
2635         if (local->func->card_present && !local->func->card_present(local)) {
2636                 if (net_ratelimit()) {
2637                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2638                                dev->name);
2639                 }
2640                 return IRQ_HANDLED;
2641         }
2642
2643         prism2_check_magic(local);
2644
2645         for (;;) {
2646                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2647                 if (ev == 0xffff) {
2648                         if (local->shutdown)
2649                                 return IRQ_HANDLED;
2650                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2651                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2652                                dev->name);
2653                         return IRQ_HANDLED;
2654                 }
2655
2656                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2657                 if (ev == 0)
2658                         break;
2659
2660                 if (ev & HFA384X_EV_CMD) {
2661                         prism2_cmd_ev(dev);
2662                 }
2663
2664                 /* Above events are needed even before hw is ready, but other
2665                  * events should be skipped during initialization. This may
2666                  * change for AllocEv if allocate_fid is implemented without
2667                  * busy waiting. */
2668                 if (!local->hw_ready || local->hw_resetting ||
2669                     !local->dev_enabled) {
2670                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2671                         if (ev & HFA384X_EV_CMD)
2672                                 goto next_event;
2673                         if ((ev & HFA384X_EVENT_MASK) == 0)
2674                                 return IRQ_HANDLED;
2675                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2676                             net_ratelimit()) {
2677                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2678                                        "not ready; skipping events 0x%04x "
2679                                        "(IntEn=0x%04x)%s%s%s\n",
2680                                        dev->name, ev,
2681                                        HFA384X_INW(HFA384X_INTEN_OFF),
2682                                        !local->hw_ready ? " (!hw_ready)" : "",
2683                                        local->hw_resetting ?
2684                                        " (hw_resetting)" : "",
2685                                        !local->dev_enabled ?
2686                                        " (!dev_enabled)" : "");
2687                         }
2688                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2689                         return IRQ_HANDLED;
2690                 }
2691
2692                 if (ev & HFA384X_EV_TICK) {
2693                         prism2_ev_tick(dev);
2694                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2695                 }
2696
2697                 if (ev & HFA384X_EV_ALLOC) {
2698                         prism2_alloc_ev(dev);
2699                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2700                 }
2701
2702                 /* Reading data from the card is quite time consuming, so do it
2703                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2704                  * and unmasked after needed data has been read completely. */
2705                 if (ev & HFA384X_BAP0_EVENTS) {
2706                         hfa384x_events_no_bap0(dev);
2707                         tasklet_schedule(&local->bap_tasklet);
2708                 }
2709
2710 #ifndef final_version
2711                 if (ev & HFA384X_EV_WTERR) {
2712                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2713                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2714                 }
2715 #endif /* final_version */
2716
2717                 if (ev & HFA384X_EV_INFDROP) {
2718                         prism2_infdrop(dev);
2719                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2720                 }
2721
2722         next_event:
2723                 events++;
2724                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2725                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2726                                "(EvStat=0x%04x)\n",
2727                                PRISM2_MAX_INTERRUPT_EVENTS,
2728                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2729                         break;
2730                 }
2731         }
2732         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2733         return IRQ_RETVAL(events);
2734 }
2735
2736
2737 static void prism2_check_sta_fw_version(local_info_t *local)
2738 {
2739         struct hfa384x_comp_ident comp;
2740         int id, variant, major, minor;
2741
2742         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2743                             &comp, sizeof(comp), 1) < 0)
2744                 return;
2745
2746         local->fw_ap = 0;
2747         id = le16_to_cpu(comp.id);
2748         if (id != HFA384X_COMP_ID_STA) {
2749                 if (id == HFA384X_COMP_ID_FW_AP)
2750                         local->fw_ap = 1;
2751                 return;
2752         }
2753
2754         major = __le16_to_cpu(comp.major);
2755         minor = __le16_to_cpu(comp.minor);
2756         variant = __le16_to_cpu(comp.variant);
2757         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2758
2759         /* Station firmware versions before 1.4.x seem to have a bug in
2760          * firmware-based WEP encryption when using Host AP mode, so use
2761          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2762          * first one that has been seen to produce correct encryption, but the
2763          * bug might be fixed before that (although, at least 1.4.2 is broken).
2764          */
2765         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2766
2767         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2768             !local->fw_encrypt_ok) {
2769                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2770                        "a workaround for firmware bug in Host AP mode WEP\n",
2771                        local->dev->name);
2772                 local->host_encrypt = 1;
2773         }
2774
2775         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2776          * in station firmware versions before 1.5.x. With these versions, the
2777          * driver uses a workaround with bogus frame format (4th address after
2778          * the payload). This is not compatible with other AP devices. Since
2779          * the firmware bug is fixed in the latest station firmware versions,
2780          * automatically enable standard compliant mode for cards using station
2781          * firmware version 1.5.0 or newer. */
2782         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2783                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2784         else {
2785                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2786                        "workaround for firmware bug in Host AP mode WDS\n",
2787                        local->dev->name);
2788         }
2789
2790         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2791 }
2792
2793
2794 static void prism2_crypt_deinit_entries(local_info_t *local, int force)
2795 {
2796         struct list_head *ptr, *n;
2797         struct ieee80211_crypt_data *entry;
2798
2799         for (ptr = local->crypt_deinit_list.next, n = ptr->next;
2800              ptr != &local->crypt_deinit_list; ptr = n, n = ptr->next) {
2801                 entry = list_entry(ptr, struct ieee80211_crypt_data, list);
2802
2803                 if (atomic_read(&entry->refcnt) != 0 && !force)
2804                         continue;
2805
2806                 list_del(ptr);
2807
2808                 if (entry->ops)
2809                         entry->ops->deinit(entry->priv);
2810                 kfree(entry);
2811         }
2812 }
2813
2814
2815 static void prism2_crypt_deinit_handler(unsigned long data)
2816 {
2817         local_info_t *local = (local_info_t *) data;
2818         unsigned long flags;
2819
2820         spin_lock_irqsave(&local->lock, flags);
2821         prism2_crypt_deinit_entries(local, 0);
2822         if (!list_empty(&local->crypt_deinit_list)) {
2823                 printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
2824                        "deletion list\n", local->dev->name);
2825                 local->crypt_deinit_timer.expires = jiffies + HZ;
2826                 add_timer(&local->crypt_deinit_timer);
2827         }
2828         spin_unlock_irqrestore(&local->lock, flags);
2829
2830 }
2831
2832
2833 static void hostap_passive_scan(unsigned long data)
2834 {
2835         local_info_t *local = (local_info_t *) data;
2836         struct net_device *dev = local->dev;
2837         u16 channel;
2838
2839         if (local->passive_scan_interval <= 0)
2840                 return;
2841
2842         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2843                 int max_tries = 16;
2844
2845                 /* Even though host system does not really know when the WLAN
2846                  * MAC is sending frames, try to avoid changing channels for
2847                  * passive scanning when a host-generated frame is being
2848                  * transmitted */
2849                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2850                         printk(KERN_DEBUG "%s: passive scan detected pending "
2851                                "TX - delaying\n", dev->name);
2852                         local->passive_scan_timer.expires = jiffies + HZ / 10;
2853                         add_timer(&local->passive_scan_timer);
2854                         return;
2855                 }
2856
2857                 do {
2858                         local->passive_scan_channel++;
2859                         if (local->passive_scan_channel > 14)
2860                                 local->passive_scan_channel = 1;
2861                         max_tries--;
2862                 } while (!(local->channel_mask &
2863                            (1 << (local->passive_scan_channel - 1))) &&
2864                          max_tries > 0);
2865
2866                 if (max_tries == 0) {
2867                         printk(KERN_INFO "%s: no allowed passive scan channels"
2868                                " found\n", dev->name);
2869                         return;
2870                 }
2871
2872                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2873                        dev->name, local->passive_scan_channel);
2874                 channel = local->passive_scan_channel;
2875                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2876                 local->passive_scan_timer.expires = jiffies + HZ / 10;
2877         } else {
2878                 channel = local->channel;
2879                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2880                 local->passive_scan_timer.expires = jiffies +
2881                         local->passive_scan_interval * HZ;
2882         }
2883
2884         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2885                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
2886                                  channel, NULL, 0))
2887                 printk(KERN_ERR "%s: passive scan channel set %d "
2888                        "failed\n", dev->name, channel);
2889
2890         add_timer(&local->passive_scan_timer);
2891 }
2892
2893
2894 /* Called only as a scheduled task when communications quality values should
2895  * be updated. */
2896 static void handle_comms_qual_update(struct work_struct *work)
2897 {
2898         local_info_t *local =
2899                 container_of(work, local_info_t, comms_qual_update);
2900         prism2_update_comms_qual(local->dev);
2901 }
2902
2903
2904 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2905  * used to monitor that local->last_tick_timer is being updated. If not,
2906  * interrupt busy-loop is assumed and driver tries to recover by masking out
2907  * some events. */
2908 static void hostap_tick_timer(unsigned long data)
2909 {
2910         static unsigned long last_inquire = 0;
2911         local_info_t *local = (local_info_t *) data;
2912         local->last_tick_timer = jiffies;
2913
2914         /* Inquire CommTallies every 10 seconds to keep the statistics updated
2915          * more often during low load and when using 32-bit tallies. */
2916         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2917             !local->hw_downloading && local->hw_ready &&
2918             !local->hw_resetting && local->dev_enabled) {
2919                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2920                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2921                 last_inquire = jiffies;
2922         }
2923
2924         if ((local->last_comms_qual_update == 0 ||
2925              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2926             (local->iw_mode == IW_MODE_INFRA ||
2927              local->iw_mode == IW_MODE_ADHOC)) {
2928                 schedule_work(&local->comms_qual_update);
2929         }
2930
2931         local->tick_timer.expires = jiffies + 2 * HZ;
2932         add_timer(&local->tick_timer);
2933 }
2934
2935
2936 #ifndef PRISM2_NO_PROCFS_DEBUG
2937 static int prism2_registers_proc_read(char *page, char **start, off_t off,
2938                                       int count, int *eof, void *data)
2939 {
2940         char *p = page;
2941         local_info_t *local = (local_info_t *) data;
2942
2943         if (off != 0) {
2944                 *eof = 1;
2945                 return 0;
2946         }
2947
2948 #define SHOW_REG(n) \
2949 p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2950
2951         SHOW_REG(CMD);
2952         SHOW_REG(PARAM0);
2953         SHOW_REG(PARAM1);
2954         SHOW_REG(PARAM2);
2955         SHOW_REG(STATUS);
2956         SHOW_REG(RESP0);
2957         SHOW_REG(RESP1);
2958         SHOW_REG(RESP2);
2959         SHOW_REG(INFOFID);
2960         SHOW_REG(CONTROL);
2961         SHOW_REG(SELECT0);
2962         SHOW_REG(SELECT1);
2963         SHOW_REG(OFFSET0);
2964         SHOW_REG(OFFSET1);
2965         SHOW_REG(RXFID);
2966         SHOW_REG(ALLOCFID);
2967         SHOW_REG(TXCOMPLFID);
2968         SHOW_REG(SWSUPPORT0);
2969         SHOW_REG(SWSUPPORT1);
2970         SHOW_REG(SWSUPPORT2);
2971         SHOW_REG(EVSTAT);
2972         SHOW_REG(INTEN);
2973         SHOW_REG(EVACK);
2974         /* Do not read data registers, because they change the state of the
2975          * MAC (offset += 2) */
2976         /* SHOW_REG(DATA0); */
2977         /* SHOW_REG(DATA1); */
2978         SHOW_REG(AUXPAGE);
2979         SHOW_REG(AUXOFFSET);
2980         /* SHOW_REG(AUXDATA); */
2981 #ifdef PRISM2_PCI
2982         SHOW_REG(PCICOR);
2983         SHOW_REG(PCIHCR);
2984         SHOW_REG(PCI_M0_ADDRH);
2985         SHOW_REG(PCI_M0_ADDRL);
2986         SHOW_REG(PCI_M0_LEN);
2987         SHOW_REG(PCI_M0_CTL);
2988         SHOW_REG(PCI_STATUS);
2989         SHOW_REG(PCI_M1_ADDRH);
2990         SHOW_REG(PCI_M1_ADDRL);
2991         SHOW_REG(PCI_M1_LEN);
2992         SHOW_REG(PCI_M1_CTL);
2993 #endif /* PRISM2_PCI */
2994
2995         return (p - page);
2996 }
2997 #endif /* PRISM2_NO_PROCFS_DEBUG */
2998
2999
3000 struct set_tim_data {
3001         struct list_head list;
3002         int aid;
3003         int set;
3004 };
3005
3006 static int prism2_set_tim(struct net_device *dev, int aid, int set)
3007 {
3008         struct list_head *ptr;
3009         struct set_tim_data *new_entry;
3010         struct hostap_interface *iface;
3011         local_info_t *local;
3012
3013         iface = netdev_priv(dev);
3014         local = iface->local;
3015
3016         new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
3017         if (new_entry == NULL) {
3018                 printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
3019                        local->dev->name);
3020                 return -ENOMEM;
3021         }
3022         new_entry->aid = aid;
3023         new_entry->set = set;
3024
3025         spin_lock_bh(&local->set_tim_lock);
3026         list_for_each(ptr, &local->set_tim_list) {
3027                 struct set_tim_data *entry =
3028                         list_entry(ptr, struct set_tim_data, list);
3029                 if (entry->aid == aid) {
3030                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
3031                                "set=%d ==> %d\n",
3032                                local->dev->name, aid, entry->set, set);
3033                         entry->set = set;
3034                         kfree(new_entry);
3035                         new_entry = NULL;
3036                         break;
3037                 }
3038         }
3039         if (new_entry)
3040                 list_add_tail(&new_entry->list, &local->set_tim_list);
3041         spin_unlock_bh(&local->set_tim_lock);
3042
3043         schedule_work(&local->set_tim_queue);
3044
3045         return 0;
3046 }
3047
3048
3049 static void handle_set_tim_queue(struct work_struct *work)
3050 {
3051         local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3052         struct set_tim_data *entry;
3053         u16 val;
3054
3055         for (;;) {
3056                 entry = NULL;
3057                 spin_lock_bh(&local->set_tim_lock);
3058                 if (!list_empty(&local->set_tim_list)) {
3059                         entry = list_entry(local->set_tim_list.next,
3060                                            struct set_tim_data, list);
3061                         list_del(&entry->list);
3062                 }
3063                 spin_unlock_bh(&local->set_tim_lock);
3064                 if (!entry)
3065                         break;
3066
3067                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3068                        local->dev->name, entry->aid, entry->set);
3069
3070                 val = entry->aid;
3071                 if (entry->set)
3072                         val |= 0x8000;
3073                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3074                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3075                                "set=%d)\n",
3076                                local->dev->name, entry->aid, entry->set);
3077                 }
3078
3079                 kfree(entry);
3080         }
3081 }
3082
3083
3084 static void prism2_clear_set_tim_queue(local_info_t *local)
3085 {
3086         struct list_head *ptr, *n;
3087
3088         list_for_each_safe(ptr, n, &local->set_tim_list) {
3089                 struct set_tim_data *entry;
3090                 entry = list_entry(ptr, struct set_tim_data, list);
3091                 list_del(&entry->list);
3092                 kfree(entry);
3093         }
3094 }
3095
3096
3097 /*
3098  * HostAP uses two layers of net devices, where the inner
3099  * layer gets called all the time from the outer layer.
3100  * This is a natural nesting, which needs a split lock type.
3101  */
3102 static struct lock_class_key hostap_netdev_xmit_lock_key;
3103
3104
3105 static struct net_device *
3106 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3107                        struct device *sdev)
3108 {
3109         struct net_device *dev;
3110         struct hostap_interface *iface;
3111         struct local_info *local;
3112         int len, i, ret;
3113
3114         if (funcs == NULL)
3115                 return NULL;
3116
3117         len = strlen(dev_template);
3118         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3119                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3120                        dev_template);
3121                 return NULL;
3122         }
3123
3124         len = sizeof(struct hostap_interface) +
3125                 3 + sizeof(struct local_info) +
3126                 3 + sizeof(struct ap_data);
3127
3128         dev = alloc_etherdev(len);
3129         if (dev == NULL)
3130                 return NULL;
3131
3132         iface = netdev_priv(dev);
3133         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3134         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3135         local->dev = iface->dev = dev;
3136         iface->local = local;
3137         iface->type = HOSTAP_INTERFACE_MASTER;
3138         INIT_LIST_HEAD(&local->hostap_interfaces);
3139
3140         local->hw_module = THIS_MODULE;
3141
3142 #ifdef PRISM2_IO_DEBUG
3143         local->io_debug_enabled = 1;
3144 #endif /* PRISM2_IO_DEBUG */
3145
3146         local->func = funcs;
3147         local->func->cmd = hfa384x_cmd;
3148         local->func->read_regs = hfa384x_read_regs;
3149         local->func->get_rid = hfa384x_get_rid;
3150         local->func->set_rid = hfa384x_set_rid;
3151         local->func->hw_enable = prism2_hw_enable;
3152         local->func->hw_config = prism2_hw_config;
3153         local->func->hw_reset = prism2_hw_reset;
3154         local->func->hw_shutdown = prism2_hw_shutdown;
3155         local->func->reset_port = prism2_reset_port;
3156         local->func->schedule_reset = prism2_schedule_reset;
3157 #ifdef PRISM2_DOWNLOAD_SUPPORT
3158         local->func->read_aux = prism2_download_aux_dump;
3159         local->func->download = prism2_download;
3160 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3161         local->func->tx = prism2_tx_80211;
3162         local->func->set_tim = prism2_set_tim;
3163         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3164                                             * skb->data (FIX: maybe for DMA bus
3165                                             * mastering? */
3166
3167         local->mtu = mtu;
3168
3169         rwlock_init(&local->iface_lock);
3170         spin_lock_init(&local->txfidlock);
3171         spin_lock_init(&local->cmdlock);
3172         spin_lock_init(&local->baplock);
3173         spin_lock_init(&local->lock);
3174         mutex_init(&local->rid_bap_mtx);
3175
3176         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3177                 card_idx = 0;
3178         local->card_idx = card_idx;
3179
3180         len = strlen(essid);
3181         memcpy(local->essid, essid,
3182                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3183         local->essid[MAX_SSID_LEN] = '\0';
3184         i = GET_INT_PARM(iw_mode, card_idx);
3185         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3186             i == IW_MODE_MONITOR) {
3187                 local->iw_mode = i;
3188         } else {
3189                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3190                        "IW_MODE_MASTER\n", i);
3191                 local->iw_mode = IW_MODE_MASTER;
3192         }
3193         local->channel = GET_INT_PARM(channel, card_idx);
3194         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3195         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3196         local->wds_max_connections = 16;
3197         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3198         local->manual_retry_count = -1;
3199         local->rts_threshold = 2347;
3200         local->fragm_threshold = 2346;
3201         local->rssi_to_dBm = 100; /* default; to be overriden by
3202                                    * cnfDbmAdjust, if available */
3203         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3204         local->sram_type = -1;
3205         local->scan_channel_mask = 0xffff;
3206
3207         /* Initialize task queue structures */
3208         INIT_WORK(&local->reset_queue, handle_reset_queue);
3209         INIT_WORK(&local->set_multicast_list_queue,
3210                   hostap_set_multicast_list_queue);
3211
3212         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3213         INIT_LIST_HEAD(&local->set_tim_list);
3214         spin_lock_init(&local->set_tim_lock);
3215
3216         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3217
3218         /* Initialize tasklets for handling hardware IRQ related operations
3219          * outside hw IRQ handler */
3220 #define HOSTAP_TASKLET_INIT(q, f, d) \
3221 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3222 while (0)
3223         HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3224                             (unsigned long) local);
3225
3226         HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3227                             (unsigned long) local);
3228         hostap_info_init(local);
3229
3230         HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3231                             hostap_rx_tasklet, (unsigned long) local);
3232         skb_queue_head_init(&local->rx_list);
3233
3234         HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3235                             hostap_sta_tx_exc_tasklet, (unsigned long) local);
3236         skb_queue_head_init(&local->sta_tx_exc_list);
3237
3238         INIT_LIST_HEAD(&local->cmd_queue);
3239         init_waitqueue_head(&local->hostscan_wq);
3240         INIT_LIST_HEAD(&local->crypt_deinit_list);
3241         init_timer(&local->crypt_deinit_timer);
3242         local->crypt_deinit_timer.data = (unsigned long) local;
3243         local->crypt_deinit_timer.function = prism2_crypt_deinit_handler;
3244
3245         init_timer(&local->passive_scan_timer);
3246         local->passive_scan_timer.data = (unsigned long) local;
3247         local->passive_scan_timer.function = hostap_passive_scan;
3248
3249         init_timer(&local->tick_timer);
3250         local->tick_timer.data = (unsigned long) local;
3251         local->tick_timer.function = hostap_tick_timer;
3252         local->tick_timer.expires = jiffies + 2 * HZ;
3253         add_timer(&local->tick_timer);
3254
3255         INIT_LIST_HEAD(&local->bss_list);
3256
3257         hostap_setup_dev(dev, local, 1);
3258         local->saved_eth_header_parse = dev->hard_header_parse;
3259
3260         dev->hard_start_xmit = hostap_master_start_xmit;
3261         dev->type = ARPHRD_IEEE80211;
3262         dev->hard_header_parse = hostap_80211_header_parse;
3263
3264         rtnl_lock();
3265         ret = dev_alloc_name(dev, "wifi%d");
3266         SET_NETDEV_DEV(dev, sdev);
3267         if (ret >= 0)
3268                 ret = register_netdevice(dev);
3269
3270         lockdep_set_class(&dev->_xmit_lock, &hostap_netdev_xmit_lock_key);
3271         rtnl_unlock();
3272         if (ret < 0) {
3273                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3274                        dev_info);
3275                 goto fail;
3276         }
3277         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3278
3279 #ifndef PRISM2_NO_PROCFS_DEBUG
3280         create_proc_read_entry("registers", 0, local->proc,
3281                                prism2_registers_proc_read, local);
3282 #endif /* PRISM2_NO_PROCFS_DEBUG */
3283
3284         hostap_init_data(local);
3285         return dev;
3286
3287  fail:
3288         free_netdev(dev);
3289         return NULL;
3290 }
3291
3292
3293 static int hostap_hw_ready(struct net_device *dev)
3294 {
3295         struct hostap_interface *iface;
3296         struct local_info *local;
3297
3298         iface = netdev_priv(dev);
3299         local = iface->local;
3300         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3301                                            "", dev_template);
3302
3303         if (local->ddev) {
3304                 if (local->iw_mode == IW_MODE_INFRA ||
3305                     local->iw_mode == IW_MODE_ADHOC) {
3306                         netif_carrier_off(local->dev);
3307                         netif_carrier_off(local->ddev);
3308                 }
3309                 hostap_init_proc(local);
3310                 hostap_init_ap_proc(local);
3311                 return 0;
3312         }
3313
3314         return -1;
3315 }
3316
3317
3318 static void prism2_free_local_data(struct net_device *dev)
3319 {
3320         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3321         int i;
3322         struct hostap_interface *iface;
3323         struct local_info *local;
3324         struct list_head *ptr, *n;
3325
3326         if (dev == NULL)
3327                 return;
3328
3329         iface = netdev_priv(dev);
3330         local = iface->local;
3331
3332         /* Unregister all netdevs before freeing local data. */
3333         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3334                 iface = list_entry(ptr, struct hostap_interface, list);
3335                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3336                         /* special handling for this interface below */
3337                         continue;
3338                 }
3339                 hostap_remove_interface(iface->dev, 0, 1);
3340         }
3341
3342         unregister_netdev(local->dev);
3343
3344         flush_scheduled_work();
3345
3346         if (timer_pending(&local->crypt_deinit_timer))
3347                 del_timer(&local->crypt_deinit_timer);
3348         prism2_crypt_deinit_entries(local, 1);
3349
3350         if (timer_pending(&local->passive_scan_timer))
3351                 del_timer(&local->passive_scan_timer);
3352
3353         if (timer_pending(&local->tick_timer))
3354                 del_timer(&local->tick_timer);
3355
3356         prism2_clear_cmd_queue(local);
3357
3358         skb_queue_purge(&local->info_list);
3359         skb_queue_purge(&local->rx_list);
3360         skb_queue_purge(&local->sta_tx_exc_list);
3361
3362         if (local->dev_enabled)
3363                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3364
3365         for (i = 0; i < WEP_KEYS; i++) {
3366                 struct ieee80211_crypt_data *crypt = local->crypt[i];
3367                 if (crypt) {
3368                         if (crypt->ops)
3369                                 crypt->ops->deinit(crypt->priv);
3370                         kfree(crypt);
3371                         local->crypt[i] = NULL;
3372                 }
3373         }
3374
3375         if (local->ap != NULL)
3376                 hostap_free_data(local->ap);
3377
3378 #ifndef PRISM2_NO_PROCFS_DEBUG
3379         if (local->proc != NULL)
3380                 remove_proc_entry("registers", local->proc);
3381 #endif /* PRISM2_NO_PROCFS_DEBUG */
3382         hostap_remove_proc(local);
3383
3384         tx_cb = local->tx_callback;
3385         while (tx_cb != NULL) {
3386                 tx_cb_prev = tx_cb;
3387                 tx_cb = tx_cb->next;
3388                 kfree(tx_cb_prev);
3389         }
3390
3391         hostap_set_hostapd(local, 0, 0);
3392         hostap_set_hostapd_sta(local, 0, 0);
3393
3394         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3395                 if (local->frag_cache[i].skb != NULL)
3396                         dev_kfree_skb(local->frag_cache[i].skb);
3397         }
3398
3399 #ifdef PRISM2_DOWNLOAD_SUPPORT
3400         prism2_download_free_data(local->dl_pri);
3401         prism2_download_free_data(local->dl_sec);
3402 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3403
3404         prism2_clear_set_tim_queue(local);
3405
3406         list_for_each_safe(ptr, n, &local->bss_list) {
3407                 struct hostap_bss_info *bss =
3408                         list_entry(ptr, struct hostap_bss_info, list);
3409                 kfree(bss);
3410         }
3411
3412         kfree(local->pda);
3413         kfree(local->last_scan_results);
3414         kfree(local->generic_elem);
3415
3416         free_netdev(local->dev);
3417 }
3418
3419
3420 #ifndef PRISM2_PLX
3421 static void prism2_suspend(struct net_device *dev)
3422 {
3423         struct hostap_interface *iface;
3424         struct local_info *local;
3425         union iwreq_data wrqu;
3426
3427         iface = dev->priv;
3428         local = iface->local;
3429
3430         /* Send disconnect event, e.g., to trigger reassociation after resume
3431          * if wpa_supplicant is used. */
3432         memset(&wrqu, 0, sizeof(wrqu));
3433         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3434         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3435
3436         /* Disable hardware and firmware */
3437         prism2_hw_shutdown(dev, 0);
3438 }
3439 #endif /* PRISM2_PLX */
3440
3441
3442 /* These might at some point be compiled separately and used as separate
3443  * kernel modules or linked into one */
3444 #ifdef PRISM2_DOWNLOAD_SUPPORT
3445 #include "hostap_download.c"
3446 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3447
3448 #ifdef PRISM2_CALLBACK
3449 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3450  * This can use platform specific code and must define prism2_callback()
3451  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3452  * used. */
3453 #include "hostap_callback.c"
3454 #endif /* PRISM2_CALLBACK */