drivers/net/wireless/intersil/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/seq_file.h>
  42 #include <linux/if_arp.h>
  43 #include <linux/delay.h>
  44 #include <linux/random.h>
  45 #include <linux/wait.h>
  46 #include <linux/sched.h>
  47 #include <linux/rtnetlink.h>
  48 #include <linux/wireless.h>
  49 #include <net/iw_handler.h>
  50 #include <net/lib80211.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 const struct file_operations prism2_download_aux_dump_proc_fops;
 134 static u8 * prism2_read_pda(struct net_device *dev);
 135 static int prism2_download(local_info_t *local,
 136                            struct prism2_download_param *param);
 137 static void prism2_download_free_data(struct prism2_download_data *dl);
 138 static int prism2_download_volatile(local_info_t *local,
 139                                     struct prism2_download_data *param);
 140 static int prism2_download_genesis(local_info_t *local,
 141                                    struct prism2_download_data *param);
 142 static int prism2_get_ram_size(local_info_t *local);
 143 #endif /* PRISM2_DOWNLOAD_SUPPORT */
 144
 145
 146
 147
 148 #ifndef final_version
 149 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
 150  * present */
 151 #define HFA384X_MAGIC 0x8A32
 152 #endif
 153
 154
 155 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
 156 {
 157         return HFA384X_INW(reg);
 158 }
 159
 160
 161 static void hfa384x_read_regs(struct net_device *dev,
 162                               struct hfa384x_regs *regs)
 163 {
 164         regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
 165         regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
 166         regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
 167         regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
 168         regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
 169 }
 170
 171
 172 /**
 173  * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
 174  * @local: pointer to private Host AP driver data
 175  * @entry: Prism2 command queue entry to be freed
 176  * @del_req: request the entry to be removed
 177  *
 178  * Internal helper function for freeing Prism2 command queue entries.
 179  * Caller must have acquired local->cmdlock before calling this function.
 180  */
 181 static inline void __hostap_cmd_queue_free(local_info_t *local,
 182                                            struct hostap_cmd_queue *entry,
 183                                            int del_req)
 184 {
 185         if (del_req) {
 186                 entry->del_req = 1;
 187                 if (!list_empty(&entry->list)) {
 188                         list_del_init(&entry->list);
 189                         local->cmd_queue_len--;
 190                 }
 191         }
 192
 193         if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
 194                 kfree(entry);
 195 }
 196
 197
 198 /**
 199  * hostap_cmd_queue_free - Free Prism2 command queue entry
 200  * @local: pointer to private Host AP driver data
 201  * @entry: Prism2 command queue entry to be freed
 202  * @del_req: request the entry to be removed
 203  *
 204  * Free a Prism2 command queue entry.
 205  */
 206 static inline void hostap_cmd_queue_free(local_info_t *local,
 207                                          struct hostap_cmd_queue *entry,
 208                                          int del_req)
 209 {
 210         unsigned long flags;
 211
 212         spin_lock_irqsave(&local->cmdlock, flags);
 213         __hostap_cmd_queue_free(local, entry, del_req);
 214         spin_unlock_irqrestore(&local->cmdlock, flags);
 215 }
 216
 217
 218 /**
 219  * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
 220  * @local: pointer to private Host AP driver data
 221  */
 222 static void prism2_clear_cmd_queue(local_info_t *local)
 223 {
 224         struct list_head *ptr, *n;
 225         unsigned long flags;
 226         struct hostap_cmd_queue *entry;
 227
 228         spin_lock_irqsave(&local->cmdlock, flags);
 229         list_for_each_safe(ptr, n, &local->cmd_queue) {
 230                 entry = list_entry(ptr, struct hostap_cmd_queue, list);
 231                 atomic_inc(&entry->usecnt);
 232                 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
 233                        "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
 234                        local->dev->name, entry->type, entry->cmd,
 235                        entry->param0);
 236                 __hostap_cmd_queue_free(local, entry, 1);
 237         }
 238         if (local->cmd_queue_len) {
 239                 /* This should not happen; print debug message and clear
 240                  * queue length. */
 241                 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
 242                        "flush\n", local->dev->name, local->cmd_queue_len);
 243                 local->cmd_queue_len = 0;
 244         }
 245         spin_unlock_irqrestore(&local->cmdlock, flags);
 246 }
 247
 248
 249 /**
 250  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
 251  * @dev: pointer to net_device
 252  * @entry: Prism2 command queue entry to be issued
 253  */
 254 static int hfa384x_cmd_issue(struct net_device *dev,
 255                                     struct hostap_cmd_queue *entry)
 256 {
 257         struct hostap_interface *iface;
 258         local_info_t *local;
 259         int tries;
 260         u16 reg;
 261         unsigned long flags;
 262
 263         iface = netdev_priv(dev);
 264         local = iface->local;
 265
 266         if (local->func->card_present && !local->func->card_present(local))
 267                 return -ENODEV;
 268
 269         if (entry->issued) {
 270                 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
 271                        dev->name, entry);
 272         }
 273
 274         /* wait until busy bit is clear; this should always be clear since the
 275          * commands are serialized */
 276         tries = HFA384X_CMD_BUSY_TIMEOUT;
 277         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 278                 tries--;
 279                 udelay(1);
 280         }
 281 #ifndef final_version
 282         if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
 283                 prism2_io_debug_error(dev, 1);
 284                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
 285                        "for %d usec\n", dev->name,
 286                        HFA384X_CMD_BUSY_TIMEOUT - tries);
 287         }
 288 #endif
 289         if (tries == 0) {
 290                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 291                 prism2_io_debug_error(dev, 2);
 292                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
 293                        "reg=0x%04x\n", dev->name, reg);
 294                 return -ETIMEDOUT;
 295         }
 296
 297         /* write command */
 298         spin_lock_irqsave(&local->cmdlock, flags);
 299         HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
 300         HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
 301         HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
 302         entry->issued = 1;
 303         spin_unlock_irqrestore(&local->cmdlock, flags);
 304
 305         return 0;
 306 }
 307
 308
 309 /**
 310  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
 311  * @dev: pointer to net_device
 312  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 313  * @param0: value for Param0 register
 314  * @param1: value for Param1 register (pointer; %NULL if not used)
 315  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
 316  *
 317  * Issue given command (possibly after waiting in command queue) and sleep
 318  * until the command is completed (or timed out or interrupted). This can be
 319  * called only from user process context.
 320  */
 321 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
 322                        u16 *param1, u16 *resp0)
 323 {
 324         struct hostap_interface *iface;
 325         local_info_t *local;
 326         int err, res, issue, issued = 0;
 327         unsigned long flags;
 328         struct hostap_cmd_queue *entry;
 329         DECLARE_WAITQUEUE(wait, current);
 330
 331         iface = netdev_priv(dev);
 332         local = iface->local;
 333
 334         if (in_interrupt()) {
 335                 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
 336                        "context\n", dev->name);
 337                 return -1;
 338         }
 339
 340         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
 341                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 342                        dev->name);
 343                 return -1;
 344         }
 345
 346         if (signal_pending(current))
 347                 return -EINTR;
 348
 349         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 350         if (entry == NULL)
 351                 return -ENOMEM;
 352
 353         atomic_set(&entry->usecnt, 1);
 354         entry->type = CMD_SLEEP;
 355         entry->cmd = cmd;
 356         entry->param0 = param0;
 357         if (param1)
 358                 entry->param1 = *param1;
 359         init_waitqueue_head(&entry->compl);
 360
 361         /* prepare to wait for command completion event, but do not sleep yet
 362          */
 363         add_wait_queue(&entry->compl, &wait);
 364         set_current_state(TASK_INTERRUPTIBLE);
 365
 366         spin_lock_irqsave(&local->cmdlock, flags);
 367         issue = list_empty(&local->cmd_queue);
 368         if (issue)
 369                 entry->issuing = 1;
 370         list_add_tail(&entry->list, &local->cmd_queue);
 371         local->cmd_queue_len++;
 372         spin_unlock_irqrestore(&local->cmdlock, flags);
 373
 374         err = 0;
 375         if (!issue)
 376                 goto wait_completion;
 377
 378         if (signal_pending(current))
 379                 err = -EINTR;
 380
 381         if (!err) {
 382                 if (hfa384x_cmd_issue(dev, entry))
 383                         err = -ETIMEDOUT;
 384                 else
 385                         issued = 1;
 386         }
 387
 388  wait_completion:
 389         if (!err && entry->type != CMD_COMPLETED) {
 390                 /* sleep until command is completed or timed out */
 391                 res = schedule_timeout(2 * HZ);
 392         } else
 393                 res = -1;
 394
 395         if (!err && signal_pending(current))
 396                 err = -EINTR;
 397
 398         if (err && issued) {
 399                 /* the command was issued, so a CmdCompl event should occur
 400                  * soon; however, there's a pending signal and
 401                  * schedule_timeout() would be interrupted; wait a short period
 402                  * of time to avoid removing entry from the list before
 403                  * CmdCompl event */
 404                 udelay(300);
 405         }
 406
 407         set_current_state(TASK_RUNNING);
 408         remove_wait_queue(&entry->compl, &wait);
 409
 410         /* If entry->list is still in the list, it must be removed
 411          * first and in this case prism2_cmd_ev() does not yet have
 412          * local reference to it, and the data can be kfree()'d
 413          * here. If the command completion event is still generated,
 414          * it will be assigned to next (possibly) pending command, but
 415          * the driver will reset the card anyway due to timeout
 416          *
 417          * If the entry is not in the list prism2_cmd_ev() has a local
 418          * reference to it, but keeps cmdlock as long as the data is
 419          * needed, so the data can be kfree()'d here. */
 420
 421         /* FIX: if the entry->list is in the list, it has not been completed
 422          * yet, so removing it here is somewhat wrong.. this could cause
 423          * references to freed memory and next list_del() causing NULL pointer
 424          * dereference.. it would probably be better to leave the entry in the
 425          * list and the list should be emptied during hw reset */
 426
 427         spin_lock_irqsave(&local->cmdlock, flags);
 428         if (!list_empty(&entry->list)) {
 429                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
 430                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
 431                        entry->type, res);
 432                 list_del_init(&entry->list);
 433                 local->cmd_queue_len--;
 434         }
 435         spin_unlock_irqrestore(&local->cmdlock, flags);
 436
 437         if (err) {
 438                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
 439                        dev->name, err);
 440                 res = err;
 441                 goto done;
 442         }
 443
 444         if (entry->type != CMD_COMPLETED) {
 445                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 446                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
 447                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
 448                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
 449                        res, entry, entry->type, entry->cmd, entry->param0, reg,
 450                        HFA384X_INW(HFA384X_INTEN_OFF));
 451                 if (reg & HFA384X_EV_CMD) {
 452                         /* Command completion event is pending, but the
 453                          * interrupt was not delivered - probably an issue
 454                          * with pcmcia-cs configuration. */
 455                         printk(KERN_WARNING "%s: interrupt delivery does not "
 456                                "seem to work\n", dev->name);
 457                 }
 458                 prism2_io_debug_error(dev, 3);
 459                 res = -ETIMEDOUT;
 460                 goto done;
 461         }
 462
 463         if (resp0 != NULL)
 464                 *resp0 = entry->resp0;
 465 #ifndef final_version
 466         if (entry->res) {
 467                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
 468                        "resp0=0x%04x\n",
 469                        dev->name, cmd, entry->res, entry->resp0);
 470         }
 471 #endif /* final_version */
 472
 473         res = entry->res;
 474  done:
 475         hostap_cmd_queue_free(local, entry, 1);
 476         return res;
 477 }
 478
 479
 480 /**
 481  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
 482  * @dev: pointer to net_device
 483  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 484  * @param0: value for Param0 register
 485  * @callback: command completion callback function (%NULL = no callback)
 486  * @context: context data to be given to the callback function
 487  *
 488  * Issue given command (possibly after waiting in command queue) and use
 489  * callback function to indicate command completion. This can be called both
 490  * from user and interrupt context. The callback function will be called in
 491  * hardware IRQ context. It can be %NULL, when no function is called when
 492  * command is completed.
 493  */
 494 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
 495                                 void (*callback)(struct net_device *dev,
 496                                                  long context, u16 resp0,
 497                                                  u16 status),
 498                                 long context)
 499 {
 500         struct hostap_interface *iface;
 501         local_info_t *local;
 502         int issue, ret;
 503         unsigned long flags;
 504         struct hostap_cmd_queue *entry;
 505
 506         iface = netdev_priv(dev);
 507         local = iface->local;
 508
 509         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
 510                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 511                        dev->name);
 512                 return -1;
 513         }
 514
 515         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 516         if (entry == NULL)
 517                 return -ENOMEM;
 518
 519         atomic_set(&entry->usecnt, 1);
 520         entry->type = CMD_CALLBACK;
 521         entry->cmd = cmd;
 522         entry->param0 = param0;
 523         entry->callback = callback;
 524         entry->context = context;
 525
 526         spin_lock_irqsave(&local->cmdlock, flags);
 527         issue = list_empty(&local->cmd_queue);
 528         if (issue)
 529                 entry->issuing = 1;
 530         list_add_tail(&entry->list, &local->cmd_queue);
 531         local->cmd_queue_len++;
 532         spin_unlock_irqrestore(&local->cmdlock, flags);
 533
 534         if (issue && hfa384x_cmd_issue(dev, entry))
 535                 ret = -ETIMEDOUT;
 536         else
 537                 ret = 0;
 538
 539         hostap_cmd_queue_free(local, entry, ret);
 540
 541         return ret;
 542 }
 543
 544
 545 /**
 546  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
 547  * @dev: pointer to net_device
 548  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 549  * @param0: value for Param0 register
 550  * @io_debug_num: I/O debug error number
 551  *
 552  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
 553  */
 554 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
 555                                  int io_debug_num)
 556 {
 557         int tries;
 558         u16 reg;
 559
 560         /* wait until busy bit is clear; this should always be clear since the
 561          * commands are serialized */
 562         tries = HFA384X_CMD_BUSY_TIMEOUT;
 563         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 564                 tries--;
 565                 udelay(1);
 566         }
 567         if (tries == 0) {
 568                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 569                 prism2_io_debug_error(dev, io_debug_num);
 570                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
 571                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
 572                 return -ETIMEDOUT;
 573         }
 574
 575         /* write command */
 576         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
 577         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
 578
 579         return 0;
 580 }
 581
 582
 583 /**
 584  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
 585  * @dev: pointer to net_device
 586  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 587  * @param0: value for Param0 register
 588  */
 589 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
 590 {
 591         int res, tries;
 592         u16 reg;
 593
 594         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
 595         if (res)
 596                 return res;
 597
 598         /* wait for command completion */
 599         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
 600                 tries = HFA384X_DL_COMPL_TIMEOUT;
 601         else
 602                 tries = HFA384X_CMD_COMPL_TIMEOUT;
 603
 604         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
 605                tries > 0) {
 606                 tries--;
 607                 udelay(10);
 608         }
 609         if (tries == 0) {
 610                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 611                 prism2_io_debug_error(dev, 5);
 612                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
 613                        "reg=0x%04x\n", dev->name, reg);
 614                 return -ETIMEDOUT;
 615         }
 616
 617         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 618                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
 619                 BIT(8))) >> 8;
 620 #ifndef final_version
 621         if (res) {
 622                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
 623                        dev->name, cmd, res);
 624         }
 625 #endif
 626
 627         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 628
 629         return res;
 630 }
 631
 632
 633 /**
 634  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
 635  * @dev: pointer to net_device
 636  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 637  * @param0: value for Param0 register
 638  */
 639 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
 640                                       u16 param0)
 641 {
 642         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
 643 }
 644
 645
 646 /**
 647  * prism2_cmd_ev - Prism2 command completion event handler
 648  * @dev: pointer to net_device
 649  *
 650  * Interrupt handler for command completion events. Called by the main
 651  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
 652  * from the hardware and ACK the event. Depending on the issued command type
 653  * either wake up the sleeping process that is waiting for command completion
 654  * or call the callback function. Issue the next command, if one is pending.
 655  */
 656 static void prism2_cmd_ev(struct net_device *dev)
 657 {
 658         struct hostap_interface *iface;
 659         local_info_t *local;
 660         struct hostap_cmd_queue *entry = NULL;
 661
 662         iface = netdev_priv(dev);
 663         local = iface->local;
 664
 665         spin_lock(&local->cmdlock);
 666         if (!list_empty(&local->cmd_queue)) {
 667                 entry = list_entry(local->cmd_queue.next,
 668                                    struct hostap_cmd_queue, list);
 669                 atomic_inc(&entry->usecnt);
 670                 list_del_init(&entry->list);
 671                 local->cmd_queue_len--;
 672
 673                 if (!entry->issued) {
 674                         printk(KERN_DEBUG "%s: Command completion event, but "
 675                                "cmd not issued\n", dev->name);
 676                         __hostap_cmd_queue_free(local, entry, 1);
 677                         entry = NULL;
 678                 }
 679         }
 680         spin_unlock(&local->cmdlock);
 681
 682         if (!entry) {
 683                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 684                 printk(KERN_DEBUG "%s: Command completion event, but no "
 685                        "pending commands\n", dev->name);
 686                 return;
 687         }
 688
 689         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
 690         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 691                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
 692                        BIT(9) | BIT(8))) >> 8;
 693         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 694
 695         /* TODO: rest of the CmdEv handling could be moved to tasklet */
 696         if (entry->type == CMD_SLEEP) {
 697                 entry->type = CMD_COMPLETED;
 698                 wake_up_interruptible(&entry->compl);
 699         } else if (entry->type == CMD_CALLBACK) {
 700                 if (entry->callback)
 701                         entry->callback(dev, entry->context, entry->resp0,
 702                                         entry->res);
 703         } else {
 704                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
 705                        dev->name, entry->type);
 706         }
 707         hostap_cmd_queue_free(local, entry, 1);
 708
 709         /* issue next command, if pending */
 710         entry = NULL;
 711         spin_lock(&local->cmdlock);
 712         if (!list_empty(&local->cmd_queue)) {
 713                 entry = list_entry(local->cmd_queue.next,
 714                                    struct hostap_cmd_queue, list);
 715                 if (entry->issuing) {
 716                         /* hfa384x_cmd() has already started issuing this
 717                          * command, so do not start here */
 718                         entry = NULL;
 719                 }
 720                 if (entry)
 721                         atomic_inc(&entry->usecnt);
 722         }
 723         spin_unlock(&local->cmdlock);
 724
 725         if (entry) {
 726                 /* issue next command; if command issuing fails, remove the
 727                  * entry from cmd_queue */
 728                 int res = hfa384x_cmd_issue(dev, entry);
 729                 spin_lock(&local->cmdlock);
 730                 __hostap_cmd_queue_free(local, entry, res);
 731                 spin_unlock(&local->cmdlock);
 732         }
 733 }
 734
 735
 736 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
 737 {
 738         int tries = HFA384X_BAP_BUSY_TIMEOUT;
 739         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 740
 741         while (res && tries > 0) {
 742                 tries--;
 743                 udelay(1);
 744                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 745         }
 746         return res;
 747 }
 748
 749
 750 /* Offset must be even */
 751 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
 752                              int offset)
 753 {
 754         u16 o_off, s_off;
 755         int ret = 0;
 756
 757         if (offset % 2 || bap > 1)
 758                 return -EINVAL;
 759
 760         if (bap == BAP1) {
 761                 o_off = HFA384X_OFFSET1_OFF;
 762                 s_off = HFA384X_SELECT1_OFF;
 763         } else {
 764                 o_off = HFA384X_OFFSET0_OFF;
 765                 s_off = HFA384X_SELECT0_OFF;
 766         }
 767
 768         if (hfa384x_wait_offset(dev, o_off)) {
 769                 prism2_io_debug_error(dev, 7);
 770                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
 771                        dev->name);
 772                 ret = -ETIMEDOUT;
 773                 goto out;
 774         }
 775
 776         HFA384X_OUTW(id, s_off);
 777         HFA384X_OUTW(offset, o_off);
 778
 779         if (hfa384x_wait_offset(dev, o_off)) {
 780                 prism2_io_debug_error(dev, 8);
 781                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
 782                        dev->name);
 783                 ret = -ETIMEDOUT;
 784                 goto out;
 785         }
 786 #ifndef final_version
 787         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
 788                 prism2_io_debug_error(dev, 9);
 789                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
 790                        "(%d,0x04%x,%d); reg=0x%04x\n",
 791                        dev->name, bap, id, offset, HFA384X_INW(o_off));
 792                 ret = -EINVAL;
 793         }
 794 #endif
 795
 796  out:
 797         return ret;
 798 }
 799
 800
 801 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
 802                            int exact_len)
 803 {
 804         struct hostap_interface *iface;
 805         local_info_t *local;
 806         int res, rlen = 0;
 807         struct hfa384x_rid_hdr rec;
 808
 809         iface = netdev_priv(dev);
 810         local = iface->local;
 811
 812         if (local->no_pri) {
 813                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
 814                        "f/w\n", dev->name, rid, len);
 815                 return -ENOTTY; /* Well.. not really correct, but return
 816                                  * something unique enough.. */
 817         }
 818
 819         if ((local->func->card_present && !local->func->card_present(local)) ||
 820             local->hw_downloading)
 821                 return -ENODEV;
 822
 823         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 824         if (res)
 825                 return res;
 826
 827         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
 828         if (res) {
 829                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
 830                        "(res=%d, rid=%04x, len=%d)\n",
 831                        dev->name, res, rid, len);
 832                 mutex_unlock(&local->rid_bap_mtx);
 833                 return res;
 834         }
 835
 836         spin_lock_bh(&local->baplock);
 837
 838         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 839         if (res)
 840                 goto unlock;
 841
 842         res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
 843         if (res)
 844                 goto unlock;
 845
 846         if (le16_to_cpu(rec.len) == 0) {
 847                 /* RID not available */
 848                 res = -ENODATA;
 849                 goto unlock;
 850         }
 851
 852         rlen = (le16_to_cpu(rec.len) - 1) * 2;
 853         if (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         res = hfa384x_from_bap(dev, BAP0, buf, len);
 861
 862 unlock:
 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         __le16 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                 u16 tmp1 = hostap_get_porttype(local);
1088                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1089                 if (ret) {
1090                         printk("%s: Port type setting to %d failed\n",
1091                                dev->name, tmp1);
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                         eth_hw_addr_inherit(iface->dev, dev);
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 resetting 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 resetting 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->dev->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                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1792                        "failed (res=%d)\n", dev->name, res);
1793                 dev->stats.tx_dropped++;
1794                 netif_wake_queue(dev);
1795                 return -1;
1796         }
1797         dev->trans_start = jiffies;
1798
1799         /* Since we did not wait for command completion, the card continues
1800          * to process on the background and we will finish handling when
1801          * command completion event is handled (prism2_cmd_ev() function) */
1802
1803         return 0;
1804 }
1805
1806
1807 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1808  * send the payload with this descriptor) */
1809 /* Called only from software IRQ */
1810 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1811 {
1812         struct hostap_interface *iface;
1813         local_info_t *local;
1814         struct hfa384x_tx_frame txdesc;
1815         struct hostap_skb_tx_data *meta;
1816         int hdr_len, data_len, idx, res, ret = -1;
1817         u16 tx_control, fc;
1818
1819         iface = netdev_priv(dev);
1820         local = iface->local;
1821
1822         meta = (struct hostap_skb_tx_data *) skb->cb;
1823
1824         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1825
1826         if ((local->func->card_present && !local->func->card_present(local)) ||
1827             !local->hw_ready || local->hw_downloading || local->pri_only) {
1828                 if (net_ratelimit()) {
1829                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1830                                " skipping\n", dev->name);
1831                 }
1832                 goto fail;
1833         }
1834
1835         memset(&txdesc, 0, sizeof(txdesc));
1836
1837         /* skb->data starts with txdesc->frame_control */
1838         hdr_len = 24;
1839         skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1840         fc = le16_to_cpu(txdesc.frame_control);
1841         if (ieee80211_is_data(txdesc.frame_control) &&
1842             ieee80211_has_a4(txdesc.frame_control) &&
1843             skb->len >= 30) {
1844                 /* Addr4 */
1845                 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1846                                                  ETH_ALEN);
1847                 hdr_len += ETH_ALEN;
1848         }
1849
1850         tx_control = local->tx_control;
1851         if (meta->tx_cb_idx) {
1852                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1853                 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1854         }
1855         txdesc.tx_control = cpu_to_le16(tx_control);
1856         txdesc.tx_rate = meta->rate;
1857
1858         data_len = skb->len - hdr_len;
1859         txdesc.data_len = cpu_to_le16(data_len);
1860         txdesc.len = cpu_to_be16(data_len);
1861
1862         idx = prism2_get_txfid_idx(local);
1863         if (idx < 0)
1864                 goto fail;
1865
1866         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1867                 hostap_dump_tx_header(dev->name, &txdesc);
1868
1869         spin_lock(&local->baplock);
1870         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1871
1872         if (!res)
1873                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1874         if (!res)
1875                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1876                                      skb->len - hdr_len);
1877         spin_unlock(&local->baplock);
1878
1879         if (!res)
1880                 res = prism2_transmit(dev, idx);
1881         if (res) {
1882                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1883                        dev->name);
1884                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1885                 schedule_work(&local->reset_queue);
1886                 goto fail;
1887         }
1888
1889         ret = 0;
1890
1891 fail:
1892         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1893         return ret;
1894 }
1895
1896
1897 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1898  * register has changed values between consecutive reads for an unknown reason.
1899  * This should really not happen, so more debugging is needed. This test
1900  * version is a bit slower, but it will detect most of such register changes
1901  * and will try to get the correct fid eventually. */
1902 #define EXTRA_FID_READ_TESTS
1903
1904 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1905 {
1906 #ifdef EXTRA_FID_READ_TESTS
1907         u16 val, val2, val3;
1908         int i;
1909
1910         for (i = 0; i < 10; i++) {
1911                 val = HFA384X_INW(reg);
1912                 val2 = HFA384X_INW(reg);
1913                 val3 = HFA384X_INW(reg);
1914
1915                 if (val == val2 && val == val3)
1916                         return val;
1917
1918                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1919                        " %04x %04x %04x\n",
1920                        dev->name, i, reg, val, val2, val3);
1921                 if ((val == val2 || val == val3) && val != 0)
1922                         return val;
1923                 if (val2 == val3 && val2 != 0)
1924                         return val2;
1925         }
1926         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1927                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1928         return val;
1929 #else /* EXTRA_FID_READ_TESTS */
1930         return HFA384X_INW(reg);
1931 #endif /* EXTRA_FID_READ_TESTS */
1932 }
1933
1934
1935 /* Called only as a tasklet (software IRQ) */
1936 static void prism2_rx(local_info_t *local)
1937 {
1938         struct net_device *dev = local->dev;
1939         int res, rx_pending = 0;
1940         u16 len, hdr_len, rxfid, status, macport;
1941         struct hfa384x_rx_frame rxdesc;
1942         struct sk_buff *skb = NULL;
1943
1944         prism2_callback(local, PRISM2_CALLBACK_RX_START);
1945
1946         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1947 #ifndef final_version
1948         if (rxfid == 0) {
1949                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1950                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1951                        rxfid);
1952                 if (rxfid == 0) {
1953                         schedule_work(&local->reset_queue);
1954                         goto rx_dropped;
1955                 }
1956                 /* try to continue with the new rxfid value */
1957         }
1958 #endif
1959
1960         spin_lock(&local->baplock);
1961         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1962         if (!res)
1963                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1964
1965         if (res) {
1966                 spin_unlock(&local->baplock);
1967                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1968                        res);
1969                 if (res == -ETIMEDOUT) {
1970                         schedule_work(&local->reset_queue);
1971                 }
1972                 goto rx_dropped;
1973         }
1974
1975         len = le16_to_cpu(rxdesc.data_len);
1976         hdr_len = sizeof(rxdesc);
1977         status = le16_to_cpu(rxdesc.status);
1978         macport = (status >> 8) & 0x07;
1979
1980         /* Drop frames with too large reported payload length. Monitor mode
1981          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1982          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1983          * macport 7 */
1984         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1985                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1986                         if (len >= (u16) -14) {
1987                                 hdr_len -= 65535 - len;
1988                                 hdr_len--;
1989                         }
1990                         len = 0;
1991                 } else {
1992                         spin_unlock(&local->baplock);
1993                         printk(KERN_DEBUG "%s: Received frame with invalid "
1994                                "length 0x%04x\n", dev->name, len);
1995                         hostap_dump_rx_header(dev->name, &rxdesc);
1996                         goto rx_dropped;
1997                 }
1998         }
1999
2000         skb = dev_alloc_skb(len + hdr_len);
2001         if (!skb) {
2002                 spin_unlock(&local->baplock);
2003                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2004                        dev->name);
2005                 goto rx_dropped;
2006         }
2007         skb->dev = dev;
2008         memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2009
2010         if (len > 0)
2011                 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2012         spin_unlock(&local->baplock);
2013         if (res) {
2014                 printk(KERN_DEBUG "%s: RX failed to read "
2015                        "frame data\n", dev->name);
2016                 goto rx_dropped;
2017         }
2018
2019         skb_queue_tail(&local->rx_list, skb);
2020         tasklet_schedule(&local->rx_tasklet);
2021
2022  rx_exit:
2023         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2024         if (!rx_pending) {
2025                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2026         }
2027
2028         return;
2029
2030  rx_dropped:
2031         dev->stats.rx_dropped++;
2032         if (skb)
2033                 dev_kfree_skb(skb);
2034         goto rx_exit;
2035 }
2036
2037
2038 /* Called only as a tasklet (software IRQ) */
2039 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2040 {
2041         struct hfa384x_rx_frame *rxdesc;
2042         struct net_device *dev = skb->dev;
2043         struct hostap_80211_rx_status stats;
2044         int hdrlen, rx_hdrlen;
2045
2046         rx_hdrlen = sizeof(*rxdesc);
2047         if (skb->len < sizeof(*rxdesc)) {
2048                 /* Allow monitor mode to receive shorter frames */
2049                 if (local->iw_mode == IW_MODE_MONITOR &&
2050                     skb->len >= sizeof(*rxdesc) - 30) {
2051                         rx_hdrlen = skb->len;
2052                 } else {
2053                         dev_kfree_skb(skb);
2054                         return;
2055                 }
2056         }
2057
2058         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2059
2060         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2061             skb->len >= sizeof(*rxdesc))
2062                 hostap_dump_rx_header(dev->name, rxdesc);
2063
2064         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2065             (!local->monitor_allow_fcserr ||
2066              local->iw_mode != IW_MODE_MONITOR))
2067                 goto drop;
2068
2069         if (skb->len > PRISM2_DATA_MAXLEN) {
2070                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2071                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2072                 goto drop;
2073         }
2074
2075         stats.mac_time = le32_to_cpu(rxdesc->time);
2076         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2077         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2078         stats.rate = rxdesc->rate;
2079
2080         /* Convert Prism2 RX structure into IEEE 802.11 header */
2081         hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2082         if (hdrlen > rx_hdrlen)
2083                 hdrlen = rx_hdrlen;
2084
2085         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2086                 &rxdesc->frame_control, hdrlen);
2087
2088         hostap_80211_rx(dev, skb, &stats);
2089         return;
2090
2091  drop:
2092         dev_kfree_skb(skb);
2093 }
2094
2095
2096 /* Called only as a tasklet (software IRQ) */
2097 static void hostap_rx_tasklet(unsigned long data)
2098 {
2099         local_info_t *local = (local_info_t *) data;
2100         struct sk_buff *skb;
2101
2102         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2103                 hostap_rx_skb(local, skb);
2104 }
2105
2106
2107 /* Called only from hardware IRQ */
2108 static void prism2_alloc_ev(struct net_device *dev)
2109 {
2110         struct hostap_interface *iface;
2111         local_info_t *local;
2112         int idx;
2113         u16 fid;
2114
2115         iface = netdev_priv(dev);
2116         local = iface->local;
2117
2118         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2119
2120         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2121
2122         spin_lock(&local->txfidlock);
2123         idx = local->next_alloc;
2124
2125         do {
2126                 if (local->txfid[idx] == fid) {
2127                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2128                                idx);
2129
2130 #ifndef final_version
2131                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2132                                 printk("Already released txfid found at idx "
2133                                        "%d\n", idx);
2134                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2135                                 printk("Already reserved txfid found at idx "
2136                                        "%d\n", idx);
2137 #endif
2138                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2139                         idx++;
2140                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2141                                 idx;
2142
2143                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2144                             netif_queue_stopped(dev))
2145                                 netif_wake_queue(dev);
2146
2147                         spin_unlock(&local->txfidlock);
2148                         return;
2149                 }
2150
2151                 idx++;
2152                 if (idx >= PRISM2_TXFID_COUNT)
2153                         idx = 0;
2154         } while (idx != local->next_alloc);
2155
2156         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2157                "read 0x%04x) for alloc event\n", dev->name, fid,
2158                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2159         printk(KERN_DEBUG "TXFIDs:");
2160         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2161                 printk(" %04x[%04x]", local->txfid[idx],
2162                        local->intransmitfid[idx]);
2163         printk("\n");
2164         spin_unlock(&local->txfidlock);
2165
2166         /* FIX: should probably schedule reset; reference to one txfid was lost
2167          * completely.. Bad things will happen if we run out of txfids
2168          * Actually, this will cause netdev watchdog to notice TX timeout and
2169          * then card reset after all txfids have been leaked. */
2170 }
2171
2172
2173 /* Called only as a tasklet (software IRQ) */
2174 static void hostap_tx_callback(local_info_t *local,
2175                                struct hfa384x_tx_frame *txdesc, int ok,
2176                                char *payload)
2177 {
2178         u16 sw_support, hdrlen, len;
2179         struct sk_buff *skb;
2180         struct hostap_tx_callback_info *cb;
2181
2182         /* Make sure that frame was from us. */
2183         if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2184                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2185                        local->dev->name);
2186                 return;
2187         }
2188
2189         sw_support = le32_to_cpu(txdesc->sw_support);
2190
2191         spin_lock(&local->lock);
2192         cb = local->tx_callback;
2193         while (cb != NULL && cb->idx != sw_support)
2194                 cb = cb->next;
2195         spin_unlock(&local->lock);
2196
2197         if (cb == NULL) {
2198                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2199                        local->dev->name, sw_support);
2200                 return;
2201         }
2202
2203         hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2204         len = le16_to_cpu(txdesc->data_len);
2205         skb = dev_alloc_skb(hdrlen + len);
2206         if (skb == NULL) {
2207                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2208                        "skb\n", local->dev->name);
2209                 return;
2210         }
2211
2212         memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2213         if (payload)
2214                 memcpy(skb_put(skb, len), payload, len);
2215
2216         skb->dev = local->dev;
2217         skb_reset_mac_header(skb);
2218
2219         cb->func(skb, ok, cb->data);
2220 }
2221
2222
2223 /* Called only as a tasklet (software IRQ) */
2224 static int hostap_tx_compl_read(local_info_t *local, int error,
2225                                 struct hfa384x_tx_frame *txdesc,
2226                                 char **payload)
2227 {
2228         u16 fid, len;
2229         int res, ret = 0;
2230         struct net_device *dev = local->dev;
2231
2232         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2233
2234         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2235
2236         spin_lock(&local->baplock);
2237         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2238         if (!res)
2239                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2240         if (res) {
2241                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2242                        "read txdesc\n", dev->name, error, fid);
2243                 if (res == -ETIMEDOUT) {
2244                         schedule_work(&local->reset_queue);
2245                 }
2246                 ret = -1;
2247                 goto fail;
2248         }
2249         if (txdesc->sw_support) {
2250                 len = le16_to_cpu(txdesc->data_len);
2251                 if (len < PRISM2_DATA_MAXLEN) {
2252                         *payload = kmalloc(len, GFP_ATOMIC);
2253                         if (*payload == NULL ||
2254                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2255                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2256                                        "frame payload\n", dev->name);
2257                                 kfree(*payload);
2258                                 *payload = NULL;
2259                                 ret = -1;
2260                                 goto fail;
2261                         }
2262                 }
2263         }
2264
2265  fail:
2266         spin_unlock(&local->baplock);
2267
2268         return ret;
2269 }
2270
2271
2272 /* Called only as a tasklet (software IRQ) */
2273 static void prism2_tx_ev(local_info_t *local)
2274 {
2275         struct net_device *dev = local->dev;
2276         char *payload = NULL;
2277         struct hfa384x_tx_frame txdesc;
2278
2279         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2280                 goto fail;
2281
2282         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2283                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2284                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2285                        "duration_id=%d\n",
2286                        dev->name, le16_to_cpu(txdesc.status),
2287                        txdesc.retry_count, txdesc.tx_rate,
2288                        le16_to_cpu(txdesc.seq_ctrl),
2289                        le16_to_cpu(txdesc.duration_id));
2290         }
2291
2292         if (txdesc.sw_support)
2293                 hostap_tx_callback(local, &txdesc, 1, payload);
2294         kfree(payload);
2295
2296  fail:
2297         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2298 }
2299
2300
2301 /* Called only as a tasklet (software IRQ) */
2302 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2303 {
2304         local_info_t *local = (local_info_t *) data;
2305         struct sk_buff *skb;
2306
2307         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2308                 struct hfa384x_tx_frame *txdesc =
2309                         (struct hfa384x_tx_frame *) skb->data;
2310
2311                 if (skb->len >= sizeof(*txdesc)) {
2312                         /* Convert Prism2 RX structure into IEEE 802.11 header
2313                          */
2314                         int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2315                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2316                                 &txdesc->frame_control, hdrlen);
2317
2318                         hostap_handle_sta_tx_exc(local, skb);
2319                 }
2320                 dev_kfree_skb(skb);
2321         }
2322 }
2323
2324
2325 /* Called only as a tasklet (software IRQ) */
2326 static void prism2_txexc(local_info_t *local)
2327 {
2328         struct net_device *dev = local->dev;
2329         u16 status, fc;
2330         int show_dump, res;
2331         char *payload = NULL;
2332         struct hfa384x_tx_frame txdesc;
2333
2334         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2335         dev->stats.tx_errors++;
2336
2337         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2338         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2339         if (res)
2340                 return;
2341
2342         status = le16_to_cpu(txdesc.status);
2343
2344         /* We produce a TXDROP event only for retry or lifetime
2345          * exceeded, because that's the only status that really mean
2346          * that this particular node went away.
2347          * Other errors means that *we* screwed up. - Jean II */
2348         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2349         {
2350                 union iwreq_data wrqu;
2351
2352                 /* Copy 802.11 dest address. */
2353                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2354                 wrqu.addr.sa_family = ARPHRD_ETHER;
2355                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2356         } else
2357                 show_dump = 1;
2358
2359         if (local->iw_mode == IW_MODE_MASTER ||
2360             local->iw_mode == IW_MODE_REPEAT ||
2361             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2362                 struct sk_buff *skb;
2363                 skb = dev_alloc_skb(sizeof(txdesc));
2364                 if (skb) {
2365                         memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2366                                sizeof(txdesc));
2367                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2368                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2369                 }
2370         }
2371
2372         if (txdesc.sw_support)
2373                 hostap_tx_callback(local, &txdesc, 0, payload);
2374         kfree(payload);
2375
2376         if (!show_dump)
2377                 return;
2378
2379         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2380                " tx_control=%04x\n",
2381                dev->name, status,
2382                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2383                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2384                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2385                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2386                le16_to_cpu(txdesc.tx_control));
2387
2388         fc = le16_to_cpu(txdesc.frame_control);
2389         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2390                "(%s%s%s::%d%s%s)\n",
2391                txdesc.retry_count, txdesc.tx_rate, fc,
2392                ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2393                ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2394                ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2395                (fc & IEEE80211_FCTL_STYPE) >> 4,
2396                ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2397                ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2398         PDEBUG(DEBUG_EXTRA, "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
2399                txdesc.addr1, txdesc.addr2,
2400                txdesc.addr3, txdesc.addr4);
2401 }
2402
2403
2404 /* Called only as a tasklet (software IRQ) */
2405 static void hostap_info_tasklet(unsigned long data)
2406 {
2407         local_info_t *local = (local_info_t *) data;
2408         struct sk_buff *skb;
2409
2410         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2411                 hostap_info_process(local, skb);
2412                 dev_kfree_skb(skb);
2413         }
2414 }
2415
2416
2417 /* Called only as a tasklet (software IRQ) */
2418 static void prism2_info(local_info_t *local)
2419 {
2420         struct net_device *dev = local->dev;
2421         u16 fid;
2422         int res, left;
2423         struct hfa384x_info_frame info;
2424         struct sk_buff *skb;
2425
2426         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2427
2428         spin_lock(&local->baplock);
2429         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2430         if (!res)
2431                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2432         if (res) {
2433                 spin_unlock(&local->baplock);
2434                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2435                        fid);
2436                 if (res == -ETIMEDOUT) {
2437                         schedule_work(&local->reset_queue);
2438                 }
2439                 goto out;
2440         }
2441
2442         left = (le16_to_cpu(info.len) - 1) * 2;
2443
2444         if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2445                 /* data register seems to give 0x8000 in some error cases even
2446                  * though busy bit is not set in offset register;
2447                  * in addition, length must be at least 1 due to type field */
2448                 spin_unlock(&local->baplock);
2449                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2450                        "length 0x%04x (type 0x%04x)\n", dev->name,
2451                        le16_to_cpu(info.len), le16_to_cpu(info.type));
2452                 goto out;
2453         }
2454
2455         skb = dev_alloc_skb(sizeof(info) + left);
2456         if (skb == NULL) {
2457                 spin_unlock(&local->baplock);
2458                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2459                        "frame\n", dev->name);
2460                 goto out;
2461         }
2462
2463         memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
2464         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2465         {
2466                 spin_unlock(&local->baplock);
2467                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2468                        "len=0x%04x, type=0x%04x\n", dev->name, fid,
2469                        le16_to_cpu(info.len), le16_to_cpu(info.type));
2470                 dev_kfree_skb(skb);
2471                 goto out;
2472         }
2473         spin_unlock(&local->baplock);
2474
2475         skb_queue_tail(&local->info_list, skb);
2476         tasklet_schedule(&local->info_tasklet);
2477
2478  out:
2479         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2480 }
2481
2482
2483 /* Called only as a tasklet (software IRQ) */
2484 static void hostap_bap_tasklet(unsigned long data)
2485 {
2486         local_info_t *local = (local_info_t *) data;
2487         struct net_device *dev = local->dev;
2488         u16 ev;
2489         int frames = 30;
2490
2491         if (local->func->card_present && !local->func->card_present(local))
2492                 return;
2493
2494         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2495
2496         /* Process all pending BAP events without generating new interrupts
2497          * for them */
2498         while (frames-- > 0) {
2499                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2500                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2501                         break;
2502                 if (ev & HFA384X_EV_RX)
2503                         prism2_rx(local);
2504                 if (ev & HFA384X_EV_INFO)
2505                         prism2_info(local);
2506                 if (ev & HFA384X_EV_TX)
2507                         prism2_tx_ev(local);
2508                 if (ev & HFA384X_EV_TXEXC)
2509                         prism2_txexc(local);
2510         }
2511
2512         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2513         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2514
2515         /* Enable interrupts for new BAP events */
2516         hfa384x_events_all(dev);
2517         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2518 }
2519
2520
2521 /* Called only from hardware IRQ */
2522 static void prism2_infdrop(struct net_device *dev)
2523 {
2524         static unsigned long last_inquire = 0;
2525
2526         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2527
2528         /* some firmware versions seem to get stuck with
2529          * full CommTallies in high traffic load cases; every
2530          * packet will then cause INFDROP event and CommTallies
2531          * info frame will not be sent automatically. Try to
2532          * get out of this state by inquiring CommTallies. */
2533         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2534                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2535                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2536                 last_inquire = jiffies;
2537         }
2538 }
2539
2540
2541 /* Called only from hardware IRQ */
2542 static void prism2_ev_tick(struct net_device *dev)
2543 {
2544         struct hostap_interface *iface;
2545         local_info_t *local;
2546         u16 evstat, inten;
2547         static int prev_stuck = 0;
2548
2549         iface = netdev_priv(dev);
2550         local = iface->local;
2551
2552         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2553             local->last_tick_timer) {
2554                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2555                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2556                 if (!prev_stuck) {
2557                         printk(KERN_INFO "%s: SW TICK stuck? "
2558                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2559                                dev->name, local->bits, evstat, inten);
2560                 }
2561                 local->sw_tick_stuck++;
2562                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2563                     (inten & HFA384X_BAP0_EVENTS)) {
2564                         printk(KERN_INFO "%s: trying to recover from IRQ "
2565                                "hang\n", dev->name);
2566                         hfa384x_events_no_bap0(dev);
2567                 }
2568                 prev_stuck = 1;
2569         } else
2570                 prev_stuck = 0;
2571 }
2572
2573
2574 /* Called only from hardware IRQ */
2575 static void prism2_check_magic(local_info_t *local)
2576 {
2577         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2578          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2579          * register once or twice seems to get the correct value.. PCI cards
2580          * cannot anyway be removed during normal operation, so there is not
2581          * really any need for this verification with them. */
2582
2583 #ifndef PRISM2_PCI
2584 #ifndef final_version
2585         static unsigned long last_magic_err = 0;
2586         struct net_device *dev = local->dev;
2587
2588         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2589                 if (!local->hw_ready)
2590                         return;
2591                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2592                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2593                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2594                                "%04X != %04X - card removed?\n", dev->name,
2595                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2596                                HFA384X_MAGIC);
2597                         last_magic_err = jiffies;
2598                 } else if (net_ratelimit()) {
2599                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2600                                "MAGIC=%04x\n", dev->name,
2601                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2602                                HFA384X_MAGIC);
2603                 }
2604                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2605                         schedule_work(&local->reset_queue);
2606                 return;
2607         }
2608 #endif /* final_version */
2609 #endif /* !PRISM2_PCI */
2610 }
2611
2612
2613 /* Called only from hardware IRQ */
2614 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2615 {
2616         struct net_device *dev = dev_id;
2617         struct hostap_interface *iface;
2618         local_info_t *local;
2619         int events = 0;
2620         u16 ev;
2621
2622         iface = netdev_priv(dev);
2623         local = iface->local;
2624
2625         /* Detect early interrupt before driver is fully configured */
2626         spin_lock(&local->irq_init_lock);
2627         if (!dev->base_addr) {
2628                 if (net_ratelimit()) {
2629                         printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2630                                dev->name);
2631                 }
2632                 spin_unlock(&local->irq_init_lock);
2633                 return IRQ_HANDLED;
2634         }
2635         spin_unlock(&local->irq_init_lock);
2636
2637         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2638
2639         if (local->func->card_present && !local->func->card_present(local)) {
2640                 if (net_ratelimit()) {
2641                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2642                                dev->name);
2643                 }
2644                 return IRQ_HANDLED;
2645         }
2646
2647         prism2_check_magic(local);
2648
2649         for (;;) {
2650                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2651                 if (ev == 0xffff) {
2652                         if (local->shutdown)
2653                                 return IRQ_HANDLED;
2654                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2655                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2656                                dev->name);
2657                         return IRQ_HANDLED;
2658                 }
2659
2660                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2661                 if (ev == 0)
2662                         break;
2663
2664                 if (ev & HFA384X_EV_CMD) {
2665                         prism2_cmd_ev(dev);
2666                 }
2667
2668                 /* Above events are needed even before hw is ready, but other
2669                  * events should be skipped during initialization. This may
2670                  * change for AllocEv if allocate_fid is implemented without
2671                  * busy waiting. */
2672                 if (!local->hw_ready || local->hw_resetting ||
2673                     !local->dev_enabled) {
2674                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2675                         if (ev & HFA384X_EV_CMD)
2676                                 goto next_event;
2677                         if ((ev & HFA384X_EVENT_MASK) == 0)
2678                                 return IRQ_HANDLED;
2679                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2680                             net_ratelimit()) {
2681                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2682                                        "not ready; skipping events 0x%04x "
2683                                        "(IntEn=0x%04x)%s%s%s\n",
2684                                        dev->name, ev,
2685                                        HFA384X_INW(HFA384X_INTEN_OFF),
2686                                        !local->hw_ready ? " (!hw_ready)" : "",
2687                                        local->hw_resetting ?
2688                                        " (hw_resetting)" : "",
2689                                        !local->dev_enabled ?
2690                                        " (!dev_enabled)" : "");
2691                         }
2692                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2693                         return IRQ_HANDLED;
2694                 }
2695
2696                 if (ev & HFA384X_EV_TICK) {
2697                         prism2_ev_tick(dev);
2698                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2699                 }
2700
2701                 if (ev & HFA384X_EV_ALLOC) {
2702                         prism2_alloc_ev(dev);
2703                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2704                 }
2705
2706                 /* Reading data from the card is quite time consuming, so do it
2707                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2708                  * and unmasked after needed data has been read completely. */
2709                 if (ev & HFA384X_BAP0_EVENTS) {
2710                         hfa384x_events_no_bap0(dev);
2711                         tasklet_schedule(&local->bap_tasklet);
2712                 }
2713
2714 #ifndef final_version
2715                 if (ev & HFA384X_EV_WTERR) {
2716                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2717                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2718                 }
2719 #endif /* final_version */
2720
2721                 if (ev & HFA384X_EV_INFDROP) {
2722                         prism2_infdrop(dev);
2723                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2724                 }
2725
2726         next_event:
2727                 events++;
2728                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2729                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2730                                "(EvStat=0x%04x)\n",
2731                                PRISM2_MAX_INTERRUPT_EVENTS,
2732                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2733                         break;
2734                 }
2735         }
2736         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2737         return IRQ_RETVAL(events);
2738 }
2739
2740
2741 static void prism2_check_sta_fw_version(local_info_t *local)
2742 {
2743         struct hfa384x_comp_ident comp;
2744         int id, variant, major, minor;
2745
2746         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2747                             &comp, sizeof(comp), 1) < 0)
2748                 return;
2749
2750         local->fw_ap = 0;
2751         id = le16_to_cpu(comp.id);
2752         if (id != HFA384X_COMP_ID_STA) {
2753                 if (id == HFA384X_COMP_ID_FW_AP)
2754                         local->fw_ap = 1;
2755                 return;
2756         }
2757
2758         major = __le16_to_cpu(comp.major);
2759         minor = __le16_to_cpu(comp.minor);
2760         variant = __le16_to_cpu(comp.variant);
2761         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2762
2763         /* Station firmware versions before 1.4.x seem to have a bug in
2764          * firmware-based WEP encryption when using Host AP mode, so use
2765          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2766          * first one that has been seen to produce correct encryption, but the
2767          * bug might be fixed before that (although, at least 1.4.2 is broken).
2768          */
2769         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2770
2771         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2772             !local->fw_encrypt_ok) {
2773                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2774                        "a workaround for firmware bug in Host AP mode WEP\n",
2775                        local->dev->name);
2776                 local->host_encrypt = 1;
2777         }
2778
2779         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2780          * in station firmware versions before 1.5.x. With these versions, the
2781          * driver uses a workaround with bogus frame format (4th address after
2782          * the payload). This is not compatible with other AP devices. Since
2783          * the firmware bug is fixed in the latest station firmware versions,
2784          * automatically enable standard compliant mode for cards using station
2785          * firmware version 1.5.0 or newer. */
2786         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2787                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2788         else {
2789                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2790                        "workaround for firmware bug in Host AP mode WDS\n",
2791                        local->dev->name);
2792         }
2793
2794         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2795 }
2796
2797
2798 static void hostap_passive_scan(unsigned long data)
2799 {
2800         local_info_t *local = (local_info_t *) data;
2801         struct net_device *dev = local->dev;
2802         u16 chan;
2803
2804         if (local->passive_scan_interval <= 0)
2805                 return;
2806
2807         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2808                 int max_tries = 16;
2809
2810                 /* Even though host system does not really know when the WLAN
2811                  * MAC is sending frames, try to avoid changing channels for
2812                  * passive scanning when a host-generated frame is being
2813                  * transmitted */
2814                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2815                         printk(KERN_DEBUG "%s: passive scan detected pending "
2816                                "TX - delaying\n", dev->name);
2817                         local->passive_scan_timer.expires = jiffies + HZ / 10;
2818                         add_timer(&local->passive_scan_timer);
2819                         return;
2820                 }
2821
2822                 do {
2823                         local->passive_scan_channel++;
2824                         if (local->passive_scan_channel > 14)
2825                                 local->passive_scan_channel = 1;
2826                         max_tries--;
2827                 } while (!(local->channel_mask &
2828                            (1 << (local->passive_scan_channel - 1))) &&
2829                          max_tries > 0);
2830
2831                 if (max_tries == 0) {
2832                         printk(KERN_INFO "%s: no allowed passive scan channels"
2833                                " found\n", dev->name);
2834                         return;
2835                 }
2836
2837                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2838                        dev->name, local->passive_scan_channel);
2839                 chan = local->passive_scan_channel;
2840                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2841                 local->passive_scan_timer.expires = jiffies + HZ / 10;
2842         } else {
2843                 chan = local->channel;
2844                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2845                 local->passive_scan_timer.expires = jiffies +
2846                         local->passive_scan_interval * HZ;
2847         }
2848
2849         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2850                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
2851                                  chan, NULL, 0))
2852                 printk(KERN_ERR "%s: passive scan channel set %d "
2853                        "failed\n", dev->name, chan);
2854
2855         add_timer(&local->passive_scan_timer);
2856 }
2857
2858
2859 /* Called only as a scheduled task when communications quality values should
2860  * be updated. */
2861 static void handle_comms_qual_update(struct work_struct *work)
2862 {
2863         local_info_t *local =
2864                 container_of(work, local_info_t, comms_qual_update);
2865         prism2_update_comms_qual(local->dev);
2866 }
2867
2868
2869 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2870  * used to monitor that local->last_tick_timer is being updated. If not,
2871  * interrupt busy-loop is assumed and driver tries to recover by masking out
2872  * some events. */
2873 static void hostap_tick_timer(unsigned long data)
2874 {
2875         static unsigned long last_inquire = 0;
2876         local_info_t *local = (local_info_t *) data;
2877         local->last_tick_timer = jiffies;
2878
2879         /* Inquire CommTallies every 10 seconds to keep the statistics updated
2880          * more often during low load and when using 32-bit tallies. */
2881         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2882             !local->hw_downloading && local->hw_ready &&
2883             !local->hw_resetting && local->dev_enabled) {
2884                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2885                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2886                 last_inquire = jiffies;
2887         }
2888
2889         if ((local->last_comms_qual_update == 0 ||
2890              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2891             (local->iw_mode == IW_MODE_INFRA ||
2892              local->iw_mode == IW_MODE_ADHOC)) {
2893                 schedule_work(&local->comms_qual_update);
2894         }
2895
2896         local->tick_timer.expires = jiffies + 2 * HZ;
2897         add_timer(&local->tick_timer);
2898 }
2899
2900
2901 #ifndef PRISM2_NO_PROCFS_DEBUG
2902 static int prism2_registers_proc_show(struct seq_file *m, void *v)
2903 {
2904         local_info_t *local = m->private;
2905
2906 #define SHOW_REG(n) \
2907   seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2908
2909         SHOW_REG(CMD);
2910         SHOW_REG(PARAM0);
2911         SHOW_REG(PARAM1);
2912         SHOW_REG(PARAM2);
2913         SHOW_REG(STATUS);
2914         SHOW_REG(RESP0);
2915         SHOW_REG(RESP1);
2916         SHOW_REG(RESP2);
2917         SHOW_REG(INFOFID);
2918         SHOW_REG(CONTROL);
2919         SHOW_REG(SELECT0);
2920         SHOW_REG(SELECT1);
2921         SHOW_REG(OFFSET0);
2922         SHOW_REG(OFFSET1);
2923         SHOW_REG(RXFID);
2924         SHOW_REG(ALLOCFID);
2925         SHOW_REG(TXCOMPLFID);
2926         SHOW_REG(SWSUPPORT0);
2927         SHOW_REG(SWSUPPORT1);
2928         SHOW_REG(SWSUPPORT2);
2929         SHOW_REG(EVSTAT);
2930         SHOW_REG(INTEN);
2931         SHOW_REG(EVACK);
2932         /* Do not read data registers, because they change the state of the
2933          * MAC (offset += 2) */
2934         /* SHOW_REG(DATA0); */
2935         /* SHOW_REG(DATA1); */
2936         SHOW_REG(AUXPAGE);
2937         SHOW_REG(AUXOFFSET);
2938         /* SHOW_REG(AUXDATA); */
2939 #ifdef PRISM2_PCI
2940         SHOW_REG(PCICOR);
2941         SHOW_REG(PCIHCR);
2942         SHOW_REG(PCI_M0_ADDRH);
2943         SHOW_REG(PCI_M0_ADDRL);
2944         SHOW_REG(PCI_M0_LEN);
2945         SHOW_REG(PCI_M0_CTL);
2946         SHOW_REG(PCI_STATUS);
2947         SHOW_REG(PCI_M1_ADDRH);
2948         SHOW_REG(PCI_M1_ADDRL);
2949         SHOW_REG(PCI_M1_LEN);
2950         SHOW_REG(PCI_M1_CTL);
2951 #endif /* PRISM2_PCI */
2952
2953         return 0;
2954 }
2955
2956 static int prism2_registers_proc_open(struct inode *inode, struct file *file)
2957 {
2958         return single_open(file, prism2_registers_proc_show, PDE_DATA(inode));
2959 }
2960
2961 static const struct file_operations prism2_registers_proc_fops = {
2962         .open           = prism2_registers_proc_open,
2963         .read           = seq_read,
2964         .llseek         = seq_lseek,
2965         .release        = single_release,
2966 };
2967
2968 #endif /* PRISM2_NO_PROCFS_DEBUG */
2969
2970
2971 struct set_tim_data {
2972         struct list_head list;
2973         int aid;
2974         int set;
2975 };
2976
2977 static int prism2_set_tim(struct net_device *dev, int aid, int set)
2978 {
2979         struct list_head *ptr;
2980         struct set_tim_data *new_entry;
2981         struct hostap_interface *iface;
2982         local_info_t *local;
2983
2984         iface = netdev_priv(dev);
2985         local = iface->local;
2986
2987         new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2988         if (new_entry == NULL)
2989                 return -ENOMEM;
2990
2991         new_entry->aid = aid;
2992         new_entry->set = set;
2993
2994         spin_lock_bh(&local->set_tim_lock);
2995         list_for_each(ptr, &local->set_tim_list) {
2996                 struct set_tim_data *entry =
2997                         list_entry(ptr, struct set_tim_data, list);
2998                 if (entry->aid == aid) {
2999                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
3000                                "set=%d ==> %d\n",
3001                                local->dev->name, aid, entry->set, set);
3002                         entry->set = set;
3003                         kfree(new_entry);
3004                         new_entry = NULL;
3005                         break;
3006                 }
3007         }
3008         if (new_entry)
3009                 list_add_tail(&new_entry->list, &local->set_tim_list);
3010         spin_unlock_bh(&local->set_tim_lock);
3011
3012         schedule_work(&local->set_tim_queue);
3013
3014         return 0;
3015 }
3016
3017
3018 static void handle_set_tim_queue(struct work_struct *work)
3019 {
3020         local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3021         struct set_tim_data *entry;
3022         u16 val;
3023
3024         for (;;) {
3025                 entry = NULL;
3026                 spin_lock_bh(&local->set_tim_lock);
3027                 if (!list_empty(&local->set_tim_list)) {
3028                         entry = list_entry(local->set_tim_list.next,
3029                                            struct set_tim_data, list);
3030                         list_del(&entry->list);
3031                 }
3032                 spin_unlock_bh(&local->set_tim_lock);
3033                 if (!entry)
3034                         break;
3035
3036                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3037                        local->dev->name, entry->aid, entry->set);
3038
3039                 val = entry->aid;
3040                 if (entry->set)
3041                         val |= 0x8000;
3042                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3043                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3044                                "set=%d)\n",
3045                                local->dev->name, entry->aid, entry->set);
3046                 }
3047
3048                 kfree(entry);
3049         }
3050 }
3051
3052
3053 static void prism2_clear_set_tim_queue(local_info_t *local)
3054 {
3055         struct list_head *ptr, *n;
3056
3057         list_for_each_safe(ptr, n, &local->set_tim_list) {
3058                 struct set_tim_data *entry;
3059                 entry = list_entry(ptr, struct set_tim_data, list);
3060                 list_del(&entry->list);
3061                 kfree(entry);
3062         }
3063 }
3064
3065
3066 /*
3067  * HostAP uses two layers of net devices, where the inner
3068  * layer gets called all the time from the outer layer.
3069  * This is a natural nesting, which needs a split lock type.
3070  */
3071 static struct lock_class_key hostap_netdev_xmit_lock_key;
3072 static struct lock_class_key hostap_netdev_addr_lock_key;
3073
3074 static void prism2_set_lockdep_class_one(struct net_device *dev,
3075                                          struct netdev_queue *txq,
3076                                          void *_unused)
3077 {
3078         lockdep_set_class(&txq->_xmit_lock,
3079                           &hostap_netdev_xmit_lock_key);
3080 }
3081
3082 static void prism2_set_lockdep_class(struct net_device *dev)
3083 {
3084         lockdep_set_class(&dev->addr_list_lock,
3085                           &hostap_netdev_addr_lock_key);
3086         netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3087 }
3088
3089 static struct net_device *
3090 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3091                        struct device *sdev)
3092 {
3093         struct net_device *dev;
3094         struct hostap_interface *iface;
3095         struct local_info *local;
3096         int len, i, ret;
3097
3098         if (funcs == NULL)
3099                 return NULL;
3100
3101         len = strlen(dev_template);
3102         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3103                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3104                        dev_template);
3105                 return NULL;
3106         }
3107
3108         len = sizeof(struct hostap_interface) +
3109                 3 + sizeof(struct local_info) +
3110                 3 + sizeof(struct ap_data);
3111
3112         dev = alloc_etherdev(len);
3113         if (dev == NULL)
3114                 return NULL;
3115
3116         iface = netdev_priv(dev);
3117         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3118         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3119         local->dev = iface->dev = dev;
3120         iface->local = local;
3121         iface->type = HOSTAP_INTERFACE_MASTER;
3122         INIT_LIST_HEAD(&local->hostap_interfaces);
3123
3124         local->hw_module = THIS_MODULE;
3125
3126 #ifdef PRISM2_IO_DEBUG
3127         local->io_debug_enabled = 1;
3128 #endif /* PRISM2_IO_DEBUG */
3129
3130         local->func = funcs;
3131         local->func->cmd = hfa384x_cmd;
3132         local->func->read_regs = hfa384x_read_regs;
3133         local->func->get_rid = hfa384x_get_rid;
3134         local->func->set_rid = hfa384x_set_rid;
3135         local->func->hw_enable = prism2_hw_enable;
3136         local->func->hw_config = prism2_hw_config;
3137         local->func->hw_reset = prism2_hw_reset;
3138         local->func->hw_shutdown = prism2_hw_shutdown;
3139         local->func->reset_port = prism2_reset_port;
3140         local->func->schedule_reset = prism2_schedule_reset;
3141 #ifdef PRISM2_DOWNLOAD_SUPPORT
3142         local->func->read_aux_fops = &prism2_download_aux_dump_proc_fops;
3143         local->func->download = prism2_download;
3144 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3145         local->func->tx = prism2_tx_80211;
3146         local->func->set_tim = prism2_set_tim;
3147         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3148                                             * skb->data (FIX: maybe for DMA bus
3149                                             * mastering? */
3150
3151         local->mtu = mtu;
3152
3153         rwlock_init(&local->iface_lock);
3154         spin_lock_init(&local->txfidlock);
3155         spin_lock_init(&local->cmdlock);
3156         spin_lock_init(&local->baplock);
3157         spin_lock_init(&local->lock);
3158         spin_lock_init(&local->irq_init_lock);
3159         mutex_init(&local->rid_bap_mtx);
3160
3161         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3162                 card_idx = 0;
3163         local->card_idx = card_idx;
3164
3165         len = strlen(essid);
3166         memcpy(local->essid, essid,
3167                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3168         local->essid[MAX_SSID_LEN] = '\0';
3169         i = GET_INT_PARM(iw_mode, card_idx);
3170         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3171             i == IW_MODE_MONITOR) {
3172                 local->iw_mode = i;
3173         } else {
3174                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3175                        "IW_MODE_MASTER\n", i);
3176                 local->iw_mode = IW_MODE_MASTER;
3177         }
3178         local->channel = GET_INT_PARM(channel, card_idx);
3179         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3180         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3181         local->wds_max_connections = 16;
3182         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3183         local->manual_retry_count = -1;
3184         local->rts_threshold = 2347;
3185         local->fragm_threshold = 2346;
3186         local->rssi_to_dBm = 100; /* default; to be overriden by
3187                                    * cnfDbmAdjust, if available */
3188         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3189         local->sram_type = -1;
3190         local->scan_channel_mask = 0xffff;
3191         local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3192
3193         /* Initialize task queue structures */
3194         INIT_WORK(&local->reset_queue, handle_reset_queue);
3195         INIT_WORK(&local->set_multicast_list_queue,
3196                   hostap_set_multicast_list_queue);
3197
3198         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3199         INIT_LIST_HEAD(&local->set_tim_list);
3200         spin_lock_init(&local->set_tim_lock);
3201
3202         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3203
3204         /* Initialize tasklets for handling hardware IRQ related operations
3205          * outside hw IRQ handler */
3206 #define HOSTAP_TASKLET_INIT(q, f, d) \
3207 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3208 while (0)
3209         HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3210                             (unsigned long) local);
3211
3212         HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3213                             (unsigned long) local);
3214         hostap_info_init(local);
3215
3216         HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3217                             hostap_rx_tasklet, (unsigned long) local);
3218         skb_queue_head_init(&local->rx_list);
3219
3220         HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3221                             hostap_sta_tx_exc_tasklet, (unsigned long) local);
3222         skb_queue_head_init(&local->sta_tx_exc_list);
3223
3224         INIT_LIST_HEAD(&local->cmd_queue);
3225         init_waitqueue_head(&local->hostscan_wq);
3226
3227         lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3228
3229         init_timer(&local->passive_scan_timer);
3230         local->passive_scan_timer.data = (unsigned long) local;
3231         local->passive_scan_timer.function = hostap_passive_scan;
3232
3233         init_timer(&local->tick_timer);
3234         local->tick_timer.data = (unsigned long) local;
3235         local->tick_timer.function = hostap_tick_timer;
3236         local->tick_timer.expires = jiffies + 2 * HZ;
3237         add_timer(&local->tick_timer);
3238
3239         INIT_LIST_HEAD(&local->bss_list);
3240
3241         hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3242
3243         dev->type = ARPHRD_IEEE80211;
3244         dev->header_ops = &hostap_80211_ops;
3245
3246         rtnl_lock();
3247         ret = dev_alloc_name(dev, "wifi%d");
3248         SET_NETDEV_DEV(dev, sdev);
3249         if (ret >= 0)
3250                 ret = register_netdevice(dev);
3251
3252         prism2_set_lockdep_class(dev);
3253         rtnl_unlock();
3254         if (ret < 0) {
3255                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3256                        dev_info);
3257                 goto fail;
3258         }
3259         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3260
3261         hostap_init_data(local);
3262         return dev;
3263
3264  fail:
3265         free_netdev(dev);
3266         return NULL;
3267 }
3268
3269
3270 static int hostap_hw_ready(struct net_device *dev)
3271 {
3272         struct hostap_interface *iface;
3273         struct local_info *local;
3274
3275         iface = netdev_priv(dev);
3276         local = iface->local;
3277         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3278                                            "", dev_template);
3279
3280         if (local->ddev) {
3281                 if (local->iw_mode == IW_MODE_INFRA ||
3282                     local->iw_mode == IW_MODE_ADHOC) {
3283                         netif_carrier_off(local->dev);
3284                         netif_carrier_off(local->ddev);
3285                 }
3286                 hostap_init_proc(local);
3287 #ifndef PRISM2_NO_PROCFS_DEBUG
3288                 proc_create_data("registers", 0, local->proc,
3289                                  &prism2_registers_proc_fops, local);
3290 #endif /* PRISM2_NO_PROCFS_DEBUG */
3291                 hostap_init_ap_proc(local);
3292                 return 0;
3293         }
3294
3295         return -1;
3296 }
3297
3298
3299 static void prism2_free_local_data(struct net_device *dev)
3300 {
3301         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3302         int i;
3303         struct hostap_interface *iface;
3304         struct local_info *local;
3305         struct list_head *ptr, *n;
3306
3307         if (dev == NULL)
3308                 return;
3309
3310         iface = netdev_priv(dev);
3311         local = iface->local;
3312
3313         /* Unregister all netdevs before freeing local data. */
3314         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3315                 iface = list_entry(ptr, struct hostap_interface, list);
3316                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3317                         /* special handling for this interface below */
3318                         continue;
3319                 }
3320                 hostap_remove_interface(iface->dev, 0, 1);
3321         }
3322
3323         unregister_netdev(local->dev);
3324
3325         flush_work(&local->reset_queue);
3326         flush_work(&local->set_multicast_list_queue);
3327         flush_work(&local->set_tim_queue);
3328 #ifndef PRISM2_NO_STATION_MODES
3329         flush_work(&local->info_queue);
3330 #endif
3331         flush_work(&local->comms_qual_update);
3332
3333         lib80211_crypt_info_free(&local->crypt_info);
3334
3335         if (timer_pending(&local->passive_scan_timer))
3336                 del_timer(&local->passive_scan_timer);
3337
3338         if (timer_pending(&local->tick_timer))
3339                 del_timer(&local->tick_timer);
3340
3341         prism2_clear_cmd_queue(local);
3342
3343         skb_queue_purge(&local->info_list);
3344         skb_queue_purge(&local->rx_list);
3345         skb_queue_purge(&local->sta_tx_exc_list);
3346
3347         if (local->dev_enabled)
3348                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3349
3350         if (local->ap != NULL)
3351                 hostap_free_data(local->ap);
3352
3353 #ifndef PRISM2_NO_PROCFS_DEBUG
3354         if (local->proc != NULL)
3355                 remove_proc_entry("registers", local->proc);
3356 #endif /* PRISM2_NO_PROCFS_DEBUG */
3357         hostap_remove_proc(local);
3358
3359         tx_cb = local->tx_callback;
3360         while (tx_cb != NULL) {
3361                 tx_cb_prev = tx_cb;
3362                 tx_cb = tx_cb->next;
3363                 kfree(tx_cb_prev);
3364         }
3365
3366         hostap_set_hostapd(local, 0, 0);
3367         hostap_set_hostapd_sta(local, 0, 0);
3368
3369         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3370                 if (local->frag_cache[i].skb != NULL)
3371                         dev_kfree_skb(local->frag_cache[i].skb);
3372         }
3373
3374 #ifdef PRISM2_DOWNLOAD_SUPPORT
3375         prism2_download_free_data(local->dl_pri);
3376         prism2_download_free_data(local->dl_sec);
3377 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3378
3379         prism2_clear_set_tim_queue(local);
3380
3381         list_for_each_safe(ptr, n, &local->bss_list) {
3382                 struct hostap_bss_info *bss =
3383                         list_entry(ptr, struct hostap_bss_info, list);
3384                 kfree(bss);
3385         }
3386
3387         kfree(local->pda);
3388         kfree(local->last_scan_results);
3389         kfree(local->generic_elem);
3390
3391         free_netdev(local->dev);
3392 }
3393
3394
3395 #if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
3396 static void prism2_suspend(struct net_device *dev)
3397 {
3398         struct hostap_interface *iface;
3399         struct local_info *local;
3400         union iwreq_data wrqu;
3401
3402         iface = netdev_priv(dev);
3403         local = iface->local;
3404
3405         /* Send disconnect event, e.g., to trigger reassociation after resume
3406          * if wpa_supplicant is used. */
3407         memset(&wrqu, 0, sizeof(wrqu));
3408         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3409         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3410
3411         /* Disable hardware and firmware */
3412         prism2_hw_shutdown(dev, 0);
3413 }
3414 #endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
3415
3416
3417 /* These might at some point be compiled separately and used as separate
3418  * kernel modules or linked into one */
3419 #ifdef PRISM2_DOWNLOAD_SUPPORT
3420 #include "hostap_download.c"
3421 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3422
3423 #ifdef PRISM2_CALLBACK
3424 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3425  * This can use platform specific code and must define prism2_callback()
3426  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3427  * used. */
3428 #include "hostap_callback.c"
3429 #endif /* PRISM2_CALLBACK */