drivers/net/wireless/intersil/hostap/hostap_hw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Host AP (software wireless LAN access point) driver for
   4  * Intersil Prism2/2.5/3.
   5  *
   6  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   7  * <[email protected]>
   8  * Copyright (c) 2002-2005, Jouni Malinen <[email protected]>
   9  *
  10  * FIX:
  11  * - there is currently no way of associating TX packets to correct wds device
  12  *   when TX Exc/OK event occurs, so all tx_packets and some
  13  *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
  14  *   field in txdesc might be used to fix this (using Alloc event to increment
  15  *   tx_packets would need some further info in txfid table)
  16  *
  17  * Buffer Access Path (BAP) usage:
  18  *   Prism2 cards have two separate BAPs for accessing the card memory. These
  19  *   should allow concurrent access to two different frames and the driver
  20  *   previously used BAP0 for sending data and BAP1 for receiving data.
  21  *   However, there seems to be number of issues with concurrent access and at
  22  *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
  23  *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
  24  *   host and card memories. BAP0 accesses are protected with local->baplock
  25  *   (spin_lock_bh) to prevent concurrent use.
  26  */
  27
  28
  29
  30 #include <asm/delay.h>
  31 #include <linux/uaccess.h>
  32
  33 #include <linux/slab.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/etherdevice.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/if_arp.h>
  39 #include <linux/delay.h>
  40 #include <linux/random.h>
  41 #include <linux/wait.h>
  42 #include <linux/sched/signal.h>
  43 #include <linux/rtnetlink.h>
  44 #include <linux/wireless.h>
  45 #include <net/iw_handler.h>
  46 #include <net/lib80211.h>
  47 #include <asm/irq.h>
  48
  49 #include "hostap_80211.h"
  50 #include "hostap.h"
  51 #include "hostap_ap.h"
  52
  53
  54 /* #define final_version */
  55
  56 static int mtu = 1500;
  57 module_param(mtu, int, 0444);
  58 MODULE_PARM_DESC(mtu, "Maximum transfer unit");
  59
  60 static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
  61 module_param_array(channel, int, NULL, 0444);
  62 MODULE_PARM_DESC(channel, "Initial channel");
  63
  64 static char essid[33] = "test";
  65 module_param_string(essid, essid, sizeof(essid), 0444);
  66 MODULE_PARM_DESC(essid, "Host AP's ESSID");
  67
  68 static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
  69 module_param_array(iw_mode, int, NULL, 0444);
  70 MODULE_PARM_DESC(iw_mode, "Initial operation mode");
  71
  72 static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
  73 module_param_array(beacon_int, int, NULL, 0444);
  74 MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
  75
  76 static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
  77 module_param_array(dtim_period, int, NULL, 0444);
  78 MODULE_PARM_DESC(dtim_period, "DTIM period");
  79
  80 static char dev_template[16] = "wlan%d";
  81 module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
  82 MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
  83                  "wlan%d)");
  84
  85 #ifdef final_version
  86 #define EXTRA_EVENTS_WTERR 0
  87 #else
  88 /* check WTERR events (Wait Time-out) in development versions */
  89 #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
  90 #endif
  91
  92 /* Events that will be using BAP0 */
  93 #define HFA384X_BAP0_EVENTS \
  94         (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
  95
  96 /* event mask, i.e., events that will result in an interrupt */
  97 #define HFA384X_EVENT_MASK \
  98         (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
  99         HFA384X_EV_CMD | HFA384X_EV_TICK | \
 100         EXTRA_EVENTS_WTERR)
 101
 102 /* Default TX control flags: use 802.11 headers and request interrupt for
 103  * failed transmits. Frames that request ACK callback, will add
 104  * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
 105  */
 106 #define HFA384X_TX_CTRL_FLAGS \
 107         (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
 108
 109
 110 /* ca. 1 usec */
 111 #define HFA384X_CMD_BUSY_TIMEOUT 5000
 112 #define HFA384X_BAP_BUSY_TIMEOUT 50000
 113
 114 /* ca. 10 usec */
 115 #define HFA384X_CMD_COMPL_TIMEOUT 20000
 116 #define HFA384X_DL_COMPL_TIMEOUT 1000000
 117
 118 /* Wait times for initialization; yield to other processes to avoid busy
 119  * waiting for long time. */
 120 #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
 121 #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
 122
 123
 124 static void prism2_hw_reset(struct net_device *dev);
 125 static void prism2_check_sta_fw_version(local_info_t *local);
 126
 127 #ifdef PRISM2_DOWNLOAD_SUPPORT
 128 /* hostap_download.c */
 129 static const struct proc_ops prism2_download_aux_dump_proc_ops;
 130 static u8 * prism2_read_pda(struct net_device *dev);
 131 static int prism2_download(local_info_t *local,
 132                            struct prism2_download_param *param);
 133 static void prism2_download_free_data(struct prism2_download_data *dl);
 134 static int prism2_download_volatile(local_info_t *local,
 135                                     struct prism2_download_data *param);
 136 static int prism2_download_genesis(local_info_t *local,
 137                                    struct prism2_download_data *param);
 138 static int prism2_get_ram_size(local_info_t *local);
 139 #endif /* PRISM2_DOWNLOAD_SUPPORT */
 140
 141
 142
 143
 144 #ifndef final_version
 145 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
 146  * present */
 147 #define HFA384X_MAGIC 0x8A32
 148 #endif
 149
 150 static void hfa384x_read_regs(struct net_device *dev,
 151                               struct hfa384x_regs *regs)
 152 {
 153         regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
 154         regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
 155         regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
 156         regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
 157         regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
 158 }
 159
 160
 161 /**
 162  * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
 163  * @local: pointer to private Host AP driver data
 164  * @entry: Prism2 command queue entry to be freed
 165  * @del_req: request the entry to be removed
 166  *
 167  * Internal helper function for freeing Prism2 command queue entries.
 168  * Caller must have acquired local->cmdlock before calling this function.
 169  */
 170 static inline void __hostap_cmd_queue_free(local_info_t *local,
 171                                            struct hostap_cmd_queue *entry,
 172                                            int del_req)
 173 {
 174         if (del_req) {
 175                 entry->del_req = 1;
 176                 if (!list_empty(&entry->list)) {
 177                         list_del_init(&entry->list);
 178                         local->cmd_queue_len--;
 179                 }
 180         }
 181
 182         if (refcount_dec_and_test(&entry->usecnt) && entry->del_req)
 183                 kfree(entry);
 184 }
 185
 186
 187 /**
 188  * hostap_cmd_queue_free - Free Prism2 command queue entry
 189  * @local: pointer to private Host AP driver data
 190  * @entry: Prism2 command queue entry to be freed
 191  * @del_req: request the entry to be removed
 192  *
 193  * Free a Prism2 command queue entry.
 194  */
 195 static inline void hostap_cmd_queue_free(local_info_t *local,
 196                                          struct hostap_cmd_queue *entry,
 197                                          int del_req)
 198 {
 199         unsigned long flags;
 200
 201         spin_lock_irqsave(&local->cmdlock, flags);
 202         __hostap_cmd_queue_free(local, entry, del_req);
 203         spin_unlock_irqrestore(&local->cmdlock, flags);
 204 }
 205
 206
 207 /**
 208  * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
 209  * @local: pointer to private Host AP driver data
 210  */
 211 static void prism2_clear_cmd_queue(local_info_t *local)
 212 {
 213         struct list_head *ptr, *n;
 214         unsigned long flags;
 215         struct hostap_cmd_queue *entry;
 216
 217         spin_lock_irqsave(&local->cmdlock, flags);
 218         list_for_each_safe(ptr, n, &local->cmd_queue) {
 219                 entry = list_entry(ptr, struct hostap_cmd_queue, list);
 220                 refcount_inc(&entry->usecnt);
 221                 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
 222                        "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
 223                        local->dev->name, entry->type, entry->cmd,
 224                        entry->param0);
 225                 __hostap_cmd_queue_free(local, entry, 1);
 226         }
 227         if (local->cmd_queue_len) {
 228                 /* This should not happen; print debug message and clear
 229                  * queue length. */
 230                 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
 231                        "flush\n", local->dev->name, local->cmd_queue_len);
 232                 local->cmd_queue_len = 0;
 233         }
 234         spin_unlock_irqrestore(&local->cmdlock, flags);
 235 }
 236
 237
 238 /**
 239  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
 240  * @dev: pointer to net_device
 241  * @entry: Prism2 command queue entry to be issued
 242  */
 243 static int hfa384x_cmd_issue(struct net_device *dev,
 244                                     struct hostap_cmd_queue *entry)
 245 {
 246         struct hostap_interface *iface;
 247         local_info_t *local;
 248         int tries;
 249         u16 reg;
 250         unsigned long flags;
 251
 252         iface = netdev_priv(dev);
 253         local = iface->local;
 254
 255         if (local->func->card_present && !local->func->card_present(local))
 256                 return -ENODEV;
 257
 258         if (entry->issued) {
 259                 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
 260                        dev->name, entry);
 261         }
 262
 263         /* wait until busy bit is clear; this should always be clear since the
 264          * commands are serialized */
 265         tries = HFA384X_CMD_BUSY_TIMEOUT;
 266         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 267                 tries--;
 268                 udelay(1);
 269         }
 270 #ifndef final_version
 271         if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
 272                 prism2_io_debug_error(dev, 1);
 273                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
 274                        "for %d usec\n", dev->name,
 275                        HFA384X_CMD_BUSY_TIMEOUT - tries);
 276         }
 277 #endif
 278         if (tries == 0) {
 279                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 280                 prism2_io_debug_error(dev, 2);
 281                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
 282                        "reg=0x%04x\n", dev->name, reg);
 283                 return -ETIMEDOUT;
 284         }
 285
 286         /* write command */
 287         spin_lock_irqsave(&local->cmdlock, flags);
 288         HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
 289         HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
 290         HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
 291         entry->issued = 1;
 292         spin_unlock_irqrestore(&local->cmdlock, flags);
 293
 294         return 0;
 295 }
 296
 297
 298 /**
 299  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
 300  * @dev: pointer to net_device
 301  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 302  * @param0: value for Param0 register
 303  * @param1: value for Param1 register (pointer; %NULL if not used)
 304  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
 305  *
 306  * Issue given command (possibly after waiting in command queue) and sleep
 307  * until the command is completed (or timed out or interrupted). This can be
 308  * called only from user process context.
 309  */
 310 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
 311                        u16 *param1, u16 *resp0)
 312 {
 313         struct hostap_interface *iface;
 314         local_info_t *local;
 315         int err, res, issue, issued = 0;
 316         unsigned long flags;
 317         struct hostap_cmd_queue *entry;
 318         DECLARE_WAITQUEUE(wait, current);
 319
 320         iface = netdev_priv(dev);
 321         local = iface->local;
 322
 323         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
 324                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 325                        dev->name);
 326                 return -1;
 327         }
 328
 329         if (signal_pending(current))
 330                 return -EINTR;
 331
 332         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 333         if (entry == NULL)
 334                 return -ENOMEM;
 335
 336         refcount_set(&entry->usecnt, 1);
 337         entry->type = CMD_SLEEP;
 338         entry->cmd = cmd;
 339         entry->param0 = param0;
 340         if (param1)
 341                 entry->param1 = *param1;
 342         init_waitqueue_head(&entry->compl);
 343
 344         /* prepare to wait for command completion event, but do not sleep yet
 345          */
 346         add_wait_queue(&entry->compl, &wait);
 347         set_current_state(TASK_INTERRUPTIBLE);
 348
 349         spin_lock_irqsave(&local->cmdlock, flags);
 350         issue = list_empty(&local->cmd_queue);
 351         if (issue)
 352                 entry->issuing = 1;
 353         list_add_tail(&entry->list, &local->cmd_queue);
 354         local->cmd_queue_len++;
 355         spin_unlock_irqrestore(&local->cmdlock, flags);
 356
 357         err = 0;
 358         if (!issue)
 359                 goto wait_completion;
 360
 361         if (signal_pending(current))
 362                 err = -EINTR;
 363
 364         if (!err) {
 365                 if (hfa384x_cmd_issue(dev, entry))
 366                         err = -ETIMEDOUT;
 367                 else
 368                         issued = 1;
 369         }
 370
 371  wait_completion:
 372         if (!err && entry->type != CMD_COMPLETED) {
 373                 /* sleep until command is completed or timed out */
 374                 res = schedule_timeout(2 * HZ);
 375         } else
 376                 res = -1;
 377
 378         if (!err && signal_pending(current))
 379                 err = -EINTR;
 380
 381         if (err && issued) {
 382                 /* the command was issued, so a CmdCompl event should occur
 383                  * soon; however, there's a pending signal and
 384                  * schedule_timeout() would be interrupted; wait a short period
 385                  * of time to avoid removing entry from the list before
 386                  * CmdCompl event */
 387                 udelay(300);
 388         }
 389
 390         set_current_state(TASK_RUNNING);
 391         remove_wait_queue(&entry->compl, &wait);
 392
 393         /* If entry->list is still in the list, it must be removed
 394          * first and in this case prism2_cmd_ev() does not yet have
 395          * local reference to it, and the data can be kfree()'d
 396          * here. If the command completion event is still generated,
 397          * it will be assigned to next (possibly) pending command, but
 398          * the driver will reset the card anyway due to timeout
 399          *
 400          * If the entry is not in the list prism2_cmd_ev() has a local
 401          * reference to it, but keeps cmdlock as long as the data is
 402          * needed, so the data can be kfree()'d here. */
 403
 404         /* FIX: if the entry->list is in the list, it has not been completed
 405          * yet, so removing it here is somewhat wrong.. this could cause
 406          * references to freed memory and next list_del() causing NULL pointer
 407          * dereference.. it would probably be better to leave the entry in the
 408          * list and the list should be emptied during hw reset */
 409
 410         spin_lock_irqsave(&local->cmdlock, flags);
 411         if (!list_empty(&entry->list)) {
 412                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
 413                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
 414                        entry->type, res);
 415                 list_del_init(&entry->list);
 416                 local->cmd_queue_len--;
 417         }
 418         spin_unlock_irqrestore(&local->cmdlock, flags);
 419
 420         if (err) {
 421                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
 422                        dev->name, err);
 423                 res = err;
 424                 goto done;
 425         }
 426
 427         if (entry->type != CMD_COMPLETED) {
 428                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 429                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
 430                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
 431                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
 432                        res, entry, entry->type, entry->cmd, entry->param0, reg,
 433                        HFA384X_INW(HFA384X_INTEN_OFF));
 434                 if (reg & HFA384X_EV_CMD) {
 435                         /* Command completion event is pending, but the
 436                          * interrupt was not delivered - probably an issue
 437                          * with pcmcia-cs configuration. */
 438                         printk(KERN_WARNING "%s: interrupt delivery does not "
 439                                "seem to work\n", dev->name);
 440                 }
 441                 prism2_io_debug_error(dev, 3);
 442                 res = -ETIMEDOUT;
 443                 goto done;
 444         }
 445
 446         if (resp0 != NULL)
 447                 *resp0 = entry->resp0;
 448 #ifndef final_version
 449         if (entry->res) {
 450                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
 451                        "resp0=0x%04x\n",
 452                        dev->name, cmd, entry->res, entry->resp0);
 453         }
 454 #endif /* final_version */
 455
 456         res = entry->res;
 457  done:
 458         hostap_cmd_queue_free(local, entry, 1);
 459         return res;
 460 }
 461
 462
 463 /**
 464  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
 465  * @dev: pointer to net_device
 466  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 467  * @param0: value for Param0 register
 468  * @callback: command completion callback function (%NULL = no callback)
 469  * @context: context data to be given to the callback function
 470  *
 471  * Issue given command (possibly after waiting in command queue) and use
 472  * callback function to indicate command completion. This can be called both
 473  * from user and interrupt context. The callback function will be called in
 474  * hardware IRQ context. It can be %NULL, when no function is called when
 475  * command is completed.
 476  */
 477 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
 478                                 void (*callback)(struct net_device *dev,
 479                                                  long context, u16 resp0,
 480                                                  u16 status),
 481                                 long context)
 482 {
 483         struct hostap_interface *iface;
 484         local_info_t *local;
 485         int issue, ret;
 486         unsigned long flags;
 487         struct hostap_cmd_queue *entry;
 488
 489         iface = netdev_priv(dev);
 490         local = iface->local;
 491
 492         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
 493                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 494                        dev->name);
 495                 return -1;
 496         }
 497
 498         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 499         if (entry == NULL)
 500                 return -ENOMEM;
 501
 502         refcount_set(&entry->usecnt, 1);
 503         entry->type = CMD_CALLBACK;
 504         entry->cmd = cmd;
 505         entry->param0 = param0;
 506         entry->callback = callback;
 507         entry->context = context;
 508
 509         spin_lock_irqsave(&local->cmdlock, flags);
 510         issue = list_empty(&local->cmd_queue);
 511         if (issue)
 512                 entry->issuing = 1;
 513         list_add_tail(&entry->list, &local->cmd_queue);
 514         local->cmd_queue_len++;
 515         spin_unlock_irqrestore(&local->cmdlock, flags);
 516
 517         if (issue && hfa384x_cmd_issue(dev, entry))
 518                 ret = -ETIMEDOUT;
 519         else
 520                 ret = 0;
 521
 522         hostap_cmd_queue_free(local, entry, ret);
 523
 524         return ret;
 525 }
 526
 527
 528 /**
 529  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
 530  * @dev: pointer to net_device
 531  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 532  * @param0: value for Param0 register
 533  * @io_debug_num: I/O debug error number
 534  *
 535  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
 536  */
 537 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
 538                                  int io_debug_num)
 539 {
 540         int tries;
 541         u16 reg;
 542
 543         /* wait until busy bit is clear; this should always be clear since the
 544          * commands are serialized */
 545         tries = HFA384X_CMD_BUSY_TIMEOUT;
 546         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 547                 tries--;
 548                 udelay(1);
 549         }
 550         if (tries == 0) {
 551                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 552                 prism2_io_debug_error(dev, io_debug_num);
 553                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
 554                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
 555                 return -ETIMEDOUT;
 556         }
 557
 558         /* write command */
 559         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
 560         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
 561
 562         return 0;
 563 }
 564
 565
 566 /**
 567  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
 568  * @dev: pointer to net_device
 569  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 570  * @param0: value for Param0 register
 571  */
 572 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
 573 {
 574         int res, tries;
 575         u16 reg;
 576
 577         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
 578         if (res)
 579                 return res;
 580
 581         /* wait for command completion */
 582         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
 583                 tries = HFA384X_DL_COMPL_TIMEOUT;
 584         else
 585                 tries = HFA384X_CMD_COMPL_TIMEOUT;
 586
 587         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
 588                tries > 0) {
 589                 tries--;
 590                 udelay(10);
 591         }
 592         if (tries == 0) {
 593                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 594                 prism2_io_debug_error(dev, 5);
 595                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
 596                        "reg=0x%04x\n", dev->name, reg);
 597                 return -ETIMEDOUT;
 598         }
 599
 600         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 601                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
 602                 BIT(8))) >> 8;
 603 #ifndef final_version
 604         if (res) {
 605                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
 606                        dev->name, cmd, res);
 607         }
 608 #endif
 609
 610         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 611
 612         return res;
 613 }
 614
 615
 616 /**
 617  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
 618  * @dev: pointer to net_device
 619  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 620  * @param0: value for Param0 register
 621  */
 622 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
 623                                       u16 param0)
 624 {
 625         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
 626 }
 627
 628
 629 /**
 630  * prism2_cmd_ev - Prism2 command completion event handler
 631  * @dev: pointer to net_device
 632  *
 633  * Interrupt handler for command completion events. Called by the main
 634  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
 635  * from the hardware and ACK the event. Depending on the issued command type
 636  * either wake up the sleeping process that is waiting for command completion
 637  * or call the callback function. Issue the next command, if one is pending.
 638  */
 639 static void prism2_cmd_ev(struct net_device *dev)
 640 {
 641         struct hostap_interface *iface;
 642         local_info_t *local;
 643         struct hostap_cmd_queue *entry = NULL;
 644
 645         iface = netdev_priv(dev);
 646         local = iface->local;
 647
 648         spin_lock(&local->cmdlock);
 649         if (!list_empty(&local->cmd_queue)) {
 650                 entry = list_entry(local->cmd_queue.next,
 651                                    struct hostap_cmd_queue, list);
 652                 refcount_inc(&entry->usecnt);
 653                 list_del_init(&entry->list);
 654                 local->cmd_queue_len--;
 655
 656                 if (!entry->issued) {
 657                         printk(KERN_DEBUG "%s: Command completion event, but "
 658                                "cmd not issued\n", dev->name);
 659                         __hostap_cmd_queue_free(local, entry, 1);
 660                         entry = NULL;
 661                 }
 662         }
 663         spin_unlock(&local->cmdlock);
 664
 665         if (!entry) {
 666                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 667                 printk(KERN_DEBUG "%s: Command completion event, but no "
 668                        "pending commands\n", dev->name);
 669                 return;
 670         }
 671
 672         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
 673         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 674                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
 675                        BIT(9) | BIT(8))) >> 8;
 676         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 677
 678         /* TODO: rest of the CmdEv handling could be moved to tasklet */
 679         if (entry->type == CMD_SLEEP) {
 680                 entry->type = CMD_COMPLETED;
 681                 wake_up_interruptible(&entry->compl);
 682         } else if (entry->type == CMD_CALLBACK) {
 683                 if (entry->callback)
 684                         entry->callback(dev, entry->context, entry->resp0,
 685                                         entry->res);
 686         } else {
 687                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
 688                        dev->name, entry->type);
 689         }
 690         hostap_cmd_queue_free(local, entry, 1);
 691
 692         /* issue next command, if pending */
 693         entry = NULL;
 694         spin_lock(&local->cmdlock);
 695         if (!list_empty(&local->cmd_queue)) {
 696                 entry = list_entry(local->cmd_queue.next,
 697                                    struct hostap_cmd_queue, list);
 698                 if (entry->issuing) {
 699                         /* hfa384x_cmd() has already started issuing this
 700                          * command, so do not start here */
 701                         entry = NULL;
 702                 }
 703                 if (entry)
 704                         refcount_inc(&entry->usecnt);
 705         }
 706         spin_unlock(&local->cmdlock);
 707
 708         if (entry) {
 709                 /* issue next command; if command issuing fails, remove the
 710                  * entry from cmd_queue */
 711                 int res = hfa384x_cmd_issue(dev, entry);
 712                 spin_lock(&local->cmdlock);
 713                 __hostap_cmd_queue_free(local, entry, res);
 714                 spin_unlock(&local->cmdlock);
 715         }
 716 }
 717
 718
 719 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
 720 {
 721         int tries = HFA384X_BAP_BUSY_TIMEOUT;
 722         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 723
 724         while (res && tries > 0) {
 725                 tries--;
 726                 udelay(1);
 727                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 728         }
 729         return res;
 730 }
 731
 732
 733 /* Offset must be even */
 734 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
 735                              int offset)
 736 {
 737         u16 o_off, s_off;
 738         int ret = 0;
 739
 740         if (offset % 2 || bap > 1)
 741                 return -EINVAL;
 742
 743         if (bap == BAP1) {
 744                 o_off = HFA384X_OFFSET1_OFF;
 745                 s_off = HFA384X_SELECT1_OFF;
 746         } else {
 747                 o_off = HFA384X_OFFSET0_OFF;
 748                 s_off = HFA384X_SELECT0_OFF;
 749         }
 750
 751         if (hfa384x_wait_offset(dev, o_off)) {
 752                 prism2_io_debug_error(dev, 7);
 753                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
 754                        dev->name);
 755                 ret = -ETIMEDOUT;
 756                 goto out;
 757         }
 758
 759         HFA384X_OUTW(id, s_off);
 760         HFA384X_OUTW(offset, o_off);
 761
 762         if (hfa384x_wait_offset(dev, o_off)) {
 763                 prism2_io_debug_error(dev, 8);
 764                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
 765                        dev->name);
 766                 ret = -ETIMEDOUT;
 767                 goto out;
 768         }
 769 #ifndef final_version
 770         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
 771                 prism2_io_debug_error(dev, 9);
 772                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
 773                        "(%d,0x04%x,%d); reg=0x%04x\n",
 774                        dev->name, bap, id, offset, HFA384X_INW(o_off));
 775                 ret = -EINVAL;
 776         }
 777 #endif
 778
 779  out:
 780         return ret;
 781 }
 782
 783
 784 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
 785                            int exact_len)
 786 {
 787         struct hostap_interface *iface;
 788         local_info_t *local;
 789         int res, rlen = 0;
 790         struct hfa384x_rid_hdr rec;
 791
 792         iface = netdev_priv(dev);
 793         local = iface->local;
 794
 795         if (local->no_pri) {
 796                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
 797                        "f/w\n", dev->name, rid, len);
 798                 return -ENOTTY; /* Well.. not really correct, but return
 799                                  * something unique enough.. */
 800         }
 801
 802         if ((local->func->card_present && !local->func->card_present(local)) ||
 803             local->hw_downloading)
 804                 return -ENODEV;
 805
 806         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 807         if (res)
 808                 return res;
 809
 810         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
 811         if (res) {
 812                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
 813                        "(res=%d, rid=%04x, len=%d)\n",
 814                        dev->name, res, rid, len);
 815                 mutex_unlock(&local->rid_bap_mtx);
 816                 return res;
 817         }
 818
 819         spin_lock_bh(&local->baplock);
 820
 821         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 822         if (res)
 823                 goto unlock;
 824
 825         res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
 826         if (res)
 827                 goto unlock;
 828
 829         if (le16_to_cpu(rec.len) == 0) {
 830                 /* RID not available */
 831                 res = -ENODATA;
 832                 goto unlock;
 833         }
 834
 835         rlen = (le16_to_cpu(rec.len) - 1) * 2;
 836         if (exact_len && rlen != len) {
 837                 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
 838                        "rid=0x%04x, len=%d (expected %d)\n",
 839                        dev->name, rid, rlen, len);
 840                 res = -ENODATA;
 841         }
 842
 843         res = hfa384x_from_bap(dev, BAP0, buf, len);
 844
 845 unlock:
 846         spin_unlock_bh(&local->baplock);
 847         mutex_unlock(&local->rid_bap_mtx);
 848
 849         if (res) {
 850                 if (res != -ENODATA)
 851                         printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
 852                                "len=%d) - failed - res=%d\n", dev->name, rid,
 853                                len, res);
 854                 if (res == -ETIMEDOUT)
 855                         prism2_hw_reset(dev);
 856                 return res;
 857         }
 858
 859         return rlen;
 860 }
 861
 862
 863 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
 864 {
 865         struct hostap_interface *iface;
 866         local_info_t *local;
 867         struct hfa384x_rid_hdr rec;
 868         int res;
 869
 870         iface = netdev_priv(dev);
 871         local = iface->local;
 872
 873         if (local->no_pri) {
 874                 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
 875                        "f/w\n", dev->name, rid, len);
 876                 return -ENOTTY; /* Well.. not really correct, but return
 877                                  * something unique enough.. */
 878         }
 879
 880         if ((local->func->card_present && !local->func->card_present(local)) ||
 881             local->hw_downloading)
 882                 return -ENODEV;
 883
 884         rec.rid = cpu_to_le16(rid);
 885         /* RID len in words and +1 for rec.rid */
 886         rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
 887
 888         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 889         if (res)
 890                 return res;
 891
 892         spin_lock_bh(&local->baplock);
 893         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 894         if (!res)
 895                 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
 896         if (!res)
 897                 res = hfa384x_to_bap(dev, BAP0, buf, len);
 898         spin_unlock_bh(&local->baplock);
 899
 900         if (res) {
 901                 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
 902                        "failed - res=%d\n", dev->name, rid, len, res);
 903                 mutex_unlock(&local->rid_bap_mtx);
 904                 return res;
 905         }
 906
 907         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
 908         mutex_unlock(&local->rid_bap_mtx);
 909
 910         if (res) {
 911                 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
 912                        "failed (res=%d, rid=%04x, len=%d)\n",
 913                        dev->name, res, rid, len);
 914
 915                 if (res == -ETIMEDOUT)
 916                         prism2_hw_reset(dev);
 917         }
 918
 919         return res;
 920 }
 921
 922
 923 static void hfa384x_disable_interrupts(struct net_device *dev)
 924 {
 925         /* disable interrupts and clear event status */
 926         HFA384X_OUTW(0, HFA384X_INTEN_OFF);
 927         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 928 }
 929
 930
 931 static void hfa384x_enable_interrupts(struct net_device *dev)
 932 {
 933         /* ack pending events and enable interrupts from selected events */
 934         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 935         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 936 }
 937
 938
 939 static void hfa384x_events_no_bap0(struct net_device *dev)
 940 {
 941         HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
 942                      HFA384X_INTEN_OFF);
 943 }
 944
 945
 946 static void hfa384x_events_all(struct net_device *dev)
 947 {
 948         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 949 }
 950
 951
 952 static void hfa384x_events_only_cmd(struct net_device *dev)
 953 {
 954         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
 955 }
 956
 957
 958 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
 959 {
 960         u16 fid;
 961         unsigned long delay;
 962
 963         /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
 964          * below would be handled like CmdCompl event (sleep here, wake up from
 965          * interrupt handler */
 966         if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
 967                 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
 968                        dev->name, len);
 969                 return 0xffff;
 970         }
 971
 972         delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
 973         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
 974                time_before(jiffies, delay))
 975                 yield();
 976         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
 977                 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
 978                 return 0xffff;
 979         }
 980
 981         fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
 982         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
 983
 984         return fid;
 985 }
 986
 987
 988 static int prism2_reset_port(struct net_device *dev)
 989 {
 990         struct hostap_interface *iface;
 991         local_info_t *local;
 992         int res;
 993
 994         iface = netdev_priv(dev);
 995         local = iface->local;
 996
 997         if (!local->dev_enabled)
 998                 return 0;
 999
1000         res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1001                           NULL, NULL);
1002         if (res)
1003                 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1004                        dev->name);
1005         else {
1006                 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1007                                   NULL, NULL);
1008                 if (res)
1009                         printk(KERN_DEBUG "%s: reset port failed to enable "
1010                                "port\n", dev->name);
1011         }
1012
1013         /* It looks like at least some STA firmware versions reset
1014          * fragmentation threshold back to 2346 after enable command. Restore
1015          * the configured value, if it differs from this default. */
1016         if (local->fragm_threshold != 2346 &&
1017             hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1018                             local->fragm_threshold)) {
1019                 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1020                        "threshold (%d) after Port0 enable\n",
1021                        dev->name, local->fragm_threshold);
1022         }
1023
1024         /* Some firmwares lose antenna selection settings on reset */
1025         (void) hostap_set_antsel(local);
1026
1027         return res;
1028 }
1029
1030
1031 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1032                                    const char *txt)
1033 {
1034         struct hfa384x_comp_ident comp;
1035         struct hostap_interface *iface;
1036         local_info_t *local;
1037
1038         iface = netdev_priv(dev);
1039         local = iface->local;
1040
1041         if (local->no_pri) {
1042                 /* PRI f/w not yet available - cannot read RIDs */
1043                 return -1;
1044         }
1045         if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1046                 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1047                 return -1;
1048         }
1049
1050         printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1051                __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1052                __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1053         return 0;
1054 }
1055
1056
1057 static int prism2_setup_rids(struct net_device *dev)
1058 {
1059         struct hostap_interface *iface;
1060         local_info_t *local;
1061         __le16 tmp;
1062         int ret = 0;
1063
1064         iface = netdev_priv(dev);
1065         local = iface->local;
1066
1067         hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1068
1069         if (!local->fw_ap) {
1070                 u16 tmp1 = hostap_get_porttype(local);
1071                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1072                 if (ret) {
1073                         printk("%s: Port type setting to %d failed\n",
1074                                dev->name, tmp1);
1075                         goto fail;
1076                 }
1077         }
1078
1079         /* Setting SSID to empty string seems to kill the card in Host AP mode
1080          */
1081         if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1082                 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1083                                         local->essid);
1084                 if (ret) {
1085                         printk("%s: AP own SSID setting failed\n", dev->name);
1086                         goto fail;
1087                 }
1088         }
1089
1090         ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1091                               PRISM2_DATA_MAXLEN);
1092         if (ret) {
1093                 printk("%s: MAC data length setting to %d failed\n",
1094                        dev->name, PRISM2_DATA_MAXLEN);
1095                 goto fail;
1096         }
1097
1098         if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1099                 printk("%s: Channel list read failed\n", dev->name);
1100                 ret = -EINVAL;
1101                 goto fail;
1102         }
1103         local->channel_mask = le16_to_cpu(tmp);
1104
1105         if (local->channel < 1 || local->channel > 14 ||
1106             !(local->channel_mask & (1 << (local->channel - 1)))) {
1107                 printk(KERN_WARNING "%s: Channel setting out of range "
1108                        "(%d)!\n", dev->name, local->channel);
1109                 ret = -EBUSY;
1110                 goto fail;
1111         }
1112
1113         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1114         if (ret) {
1115                 printk("%s: Channel setting to %d failed\n",
1116                        dev->name, local->channel);
1117                 goto fail;
1118         }
1119
1120         ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1121                               local->beacon_int);
1122         if (ret) {
1123                 printk("%s: Beacon interval setting to %d failed\n",
1124                        dev->name, local->beacon_int);
1125                 /* this may fail with Symbol/Lucent firmware */
1126                 if (ret == -ETIMEDOUT)
1127                         goto fail;
1128         }
1129
1130         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1131                               local->dtim_period);
1132         if (ret) {
1133                 printk("%s: DTIM period setting to %d failed\n",
1134                        dev->name, local->dtim_period);
1135                 /* this may fail with Symbol/Lucent firmware */
1136                 if (ret == -ETIMEDOUT)
1137                         goto fail;
1138         }
1139
1140         ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1141                               local->is_promisc);
1142         if (ret)
1143                 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1144                        dev->name, local->is_promisc);
1145
1146         if (!local->fw_ap) {
1147                 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1148                                         local->essid);
1149                 if (ret) {
1150                         printk("%s: Desired SSID setting failed\n", dev->name);
1151                         goto fail;
1152                 }
1153         }
1154
1155         /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1156          * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1157          * rates */
1158         if (local->tx_rate_control == 0) {
1159                 local->tx_rate_control =
1160                         HFA384X_RATES_1MBPS |
1161                         HFA384X_RATES_2MBPS |
1162                         HFA384X_RATES_5MBPS |
1163                         HFA384X_RATES_11MBPS;
1164         }
1165         if (local->basic_rates == 0)
1166                 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1167
1168         if (!local->fw_ap) {
1169                 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1170                                       local->tx_rate_control);
1171                 if (ret) {
1172                         printk("%s: TXRateControl setting to %d failed\n",
1173                                dev->name, local->tx_rate_control);
1174                         goto fail;
1175                 }
1176
1177                 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1178                                       local->tx_rate_control);
1179                 if (ret) {
1180                         printk("%s: cnfSupportedRates setting to %d failed\n",
1181                                dev->name, local->tx_rate_control);
1182                 }
1183
1184                 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1185                                       local->basic_rates);
1186                 if (ret) {
1187                         printk("%s: cnfBasicRates setting to %d failed\n",
1188                                dev->name, local->basic_rates);
1189                 }
1190
1191                 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1192                 if (ret) {
1193                         printk("%s: Create IBSS setting to 1 failed\n",
1194                                dev->name);
1195                 }
1196         }
1197
1198         if (local->name_set)
1199                 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1200                                          local->name);
1201
1202         if (hostap_set_encryption(local)) {
1203                 printk(KERN_INFO "%s: could not configure encryption\n",
1204                        dev->name);
1205         }
1206
1207         (void) hostap_set_antsel(local);
1208
1209         if (hostap_set_roaming(local)) {
1210                 printk(KERN_INFO "%s: could not set host roaming\n",
1211                        dev->name);
1212         }
1213
1214         if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1215             hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1216                 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1217                        dev->name, local->enh_sec);
1218
1219         /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1220          * not working correctly (last seven counters report bogus values).
1221          * This has been fixed in 0.8.2, so enable 32-bit tallies only
1222          * beginning with that firmware version. Another bug fix for 32-bit
1223          * tallies in 1.4.0; should 16-bit tallies be used for some other
1224          * versions, too? */
1225         if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1226                 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1227                         printk(KERN_INFO "%s: cnfThirty2Tally setting "
1228                                "failed\n", dev->name);
1229                         local->tallies32 = 0;
1230                 } else
1231                         local->tallies32 = 1;
1232         } else
1233                 local->tallies32 = 0;
1234
1235         hostap_set_auth_algs(local);
1236
1237         if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1238                             local->fragm_threshold)) {
1239                 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1240                        "failed\n", dev->name, local->fragm_threshold);
1241         }
1242
1243         if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1244                             local->rts_threshold)) {
1245                 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1246                        dev->name, local->rts_threshold);
1247         }
1248
1249         if (local->manual_retry_count >= 0 &&
1250             hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1251                             local->manual_retry_count)) {
1252                 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1253                        dev->name, local->manual_retry_count);
1254         }
1255
1256         if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1257             hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1258                 local->rssi_to_dBm = le16_to_cpu(tmp);
1259         }
1260
1261         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1262             hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1263                 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1264                        dev->name);
1265         }
1266
1267         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1268             hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1269                             local->generic_elem, local->generic_elem_len)) {
1270                 printk(KERN_INFO "%s: setting genericElement failed\n",
1271                        dev->name);
1272         }
1273
1274  fail:
1275         return ret;
1276 }
1277
1278
1279 static int prism2_hw_init(struct net_device *dev, int initial)
1280 {
1281         struct hostap_interface *iface;
1282         local_info_t *local;
1283         int ret, first = 1;
1284         unsigned long start, delay;
1285
1286         PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1287
1288         iface = netdev_priv(dev);
1289         local = iface->local;
1290
1291         clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1292
1293  init:
1294         /* initialize HFA 384x */
1295         ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1296         if (ret) {
1297                 printk(KERN_INFO "%s: first command failed - assuming card "
1298                        "does not have primary firmware\n", dev_info);
1299         }
1300
1301         if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1302                 /* EvStat has Cmd bit set in some cases, so retry once if no
1303                  * wait was needed */
1304                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1305                 printk(KERN_DEBUG "%s: init command completed too quickly - "
1306                        "retrying\n", dev->name);
1307                 first = 0;
1308                 goto init;
1309         }
1310
1311         start = jiffies;
1312         delay = jiffies + HFA384X_INIT_TIMEOUT;
1313         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1314                time_before(jiffies, delay))
1315                 yield();
1316         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1317                 printk(KERN_DEBUG "%s: assuming no Primary image in "
1318                        "flash - card initialization not completed\n",
1319                        dev_info);
1320                 local->no_pri = 1;
1321 #ifdef PRISM2_DOWNLOAD_SUPPORT
1322                         if (local->sram_type == -1)
1323                                 local->sram_type = prism2_get_ram_size(local);
1324 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1325                 return 1;
1326         }
1327         local->no_pri = 0;
1328         printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1329                (jiffies - start) * 1000 / HZ);
1330         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1331         return 0;
1332 }
1333
1334
1335 static int prism2_hw_init2(struct net_device *dev, int initial)
1336 {
1337         struct hostap_interface *iface;
1338         local_info_t *local;
1339         int i;
1340
1341         iface = netdev_priv(dev);
1342         local = iface->local;
1343
1344 #ifdef PRISM2_DOWNLOAD_SUPPORT
1345         kfree(local->pda);
1346         if (local->no_pri)
1347                 local->pda = NULL;
1348         else
1349                 local->pda = prism2_read_pda(dev);
1350 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1351
1352         hfa384x_disable_interrupts(dev);
1353
1354 #ifndef final_version
1355         HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1356         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1357                 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1358                        HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1359                 goto failed;
1360         }
1361 #endif
1362
1363         if (initial || local->pri_only) {
1364                 hfa384x_events_only_cmd(dev);
1365                 /* get card version information */
1366                 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1367                     prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1368                         hfa384x_disable_interrupts(dev);
1369                         goto failed;
1370                 }
1371
1372                 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1373                         printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1374                                "- only Primary f/w present\n", dev->name);
1375                         local->pri_only = 1;
1376                         return 0;
1377                 }
1378                 local->pri_only = 0;
1379                 hfa384x_disable_interrupts(dev);
1380         }
1381
1382         /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1383          * enable interrupts before this. This would also require some sort of
1384          * sleeping AllocEv waiting */
1385
1386         /* allocate TX FIDs */
1387         local->txfid_len = PRISM2_TXFID_LEN;
1388         for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1389                 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1390                 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1391                         local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1392                         if (local->txfid[i] != 0xffff) {
1393                                 printk(KERN_DEBUG "%s: Using shorter TX FID "
1394                                        "(1600 bytes)\n", dev->name);
1395                                 local->txfid_len = 1600;
1396                         }
1397                 }
1398                 if (local->txfid[i] == 0xffff)
1399                         goto failed;
1400                 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1401         }
1402
1403         hfa384x_events_only_cmd(dev);
1404
1405         if (initial) {
1406                 u8 addr[ETH_ALEN] = {};
1407                 struct list_head *ptr;
1408
1409                 prism2_check_sta_fw_version(local);
1410
1411                 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1412                                     addr, ETH_ALEN, 1) < 0) {
1413                         printk("%s: could not get own MAC address\n",
1414                                dev->name);
1415                 }
1416                 eth_hw_addr_set(dev, addr);
1417                 list_for_each(ptr, &local->hostap_interfaces) {
1418                         iface = list_entry(ptr, struct hostap_interface, list);
1419                         eth_hw_addr_inherit(iface->dev, dev);
1420                 }
1421         } else if (local->fw_ap)
1422                 prism2_check_sta_fw_version(local);
1423
1424         prism2_setup_rids(dev);
1425
1426         /* MAC is now configured, but port 0 is not yet enabled */
1427         return 0;
1428
1429  failed:
1430         if (!local->no_pri)
1431                 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1432         return 1;
1433 }
1434
1435
1436 static int prism2_hw_enable(struct net_device *dev, int initial)
1437 {
1438         struct hostap_interface *iface;
1439         local_info_t *local;
1440         int was_resetting;
1441
1442         iface = netdev_priv(dev);
1443         local = iface->local;
1444         was_resetting = local->hw_resetting;
1445
1446         if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1447                 printk("%s: MAC port 0 enabling failed\n", dev->name);
1448                 return 1;
1449         }
1450
1451         local->hw_ready = 1;
1452         local->hw_reset_tries = 0;
1453         local->hw_resetting = 0;
1454         hfa384x_enable_interrupts(dev);
1455
1456         /* at least D-Link DWL-650 seems to require additional port reset
1457          * before it starts acting as an AP, so reset port automatically
1458          * here just in case */
1459         if (initial && prism2_reset_port(dev)) {
1460                 printk("%s: MAC port 0 resetting failed\n", dev->name);
1461                 return 1;
1462         }
1463
1464         if (was_resetting && netif_queue_stopped(dev)) {
1465                 /* If hw_reset() was called during pending transmit, netif
1466                  * queue was stopped. Wake it up now since the wlan card has
1467                  * been resetted. */
1468                 netif_wake_queue(dev);
1469         }
1470
1471         return 0;
1472 }
1473
1474
1475 static int prism2_hw_config(struct net_device *dev, int initial)
1476 {
1477         struct hostap_interface *iface;
1478         local_info_t *local;
1479
1480         iface = netdev_priv(dev);
1481         local = iface->local;
1482
1483         if (local->hw_downloading)
1484                 return 1;
1485
1486         if (prism2_hw_init(dev, initial)) {
1487                 return local->no_pri ? 0 : 1;
1488         }
1489
1490         if (prism2_hw_init2(dev, initial))
1491                 return 1;
1492
1493         /* Enable firmware if secondary image is loaded and at least one of the
1494          * netdevices is up. */
1495         if (!local->pri_only &&
1496             (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1497                 if (!local->dev_enabled)
1498                         prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1499                 local->dev_enabled = 1;
1500                 return prism2_hw_enable(dev, initial);
1501         }
1502
1503         return 0;
1504 }
1505
1506
1507 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1508 {
1509         struct hostap_interface *iface;
1510         local_info_t *local;
1511
1512         iface = netdev_priv(dev);
1513         local = iface->local;
1514
1515         /* Allow only command completion events during disable */
1516         hfa384x_events_only_cmd(dev);
1517
1518         local->hw_ready = 0;
1519         if (local->dev_enabled)
1520                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1521         local->dev_enabled = 0;
1522
1523         if (local->func->card_present && !local->func->card_present(local)) {
1524                 printk(KERN_DEBUG "%s: card already removed or not configured "
1525                        "during shutdown\n", dev->name);
1526                 return;
1527         }
1528
1529         if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1530             hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1531                 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1532
1533         hfa384x_disable_interrupts(dev);
1534
1535         if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1536                 hfa384x_events_only_cmd(dev);
1537         else
1538                 prism2_clear_cmd_queue(local);
1539 }
1540
1541
1542 static void prism2_hw_reset(struct net_device *dev)
1543 {
1544         struct hostap_interface *iface;
1545         local_info_t *local;
1546
1547 #if 0
1548         static long last_reset = 0;
1549
1550         /* do not reset card more than once per second to avoid ending up in a
1551          * busy loop resetting the card */
1552         if (time_before_eq(jiffies, last_reset + HZ))
1553                 return;
1554         last_reset = jiffies;
1555 #endif
1556
1557         iface = netdev_priv(dev);
1558         local = iface->local;
1559
1560         if (local->hw_downloading)
1561                 return;
1562
1563         if (local->hw_resetting) {
1564                 printk(KERN_WARNING "%s: %s: already resetting card - "
1565                        "ignoring reset request\n", dev_info, dev->name);
1566                 return;
1567         }
1568
1569         local->hw_reset_tries++;
1570         if (local->hw_reset_tries > 10) {
1571                 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1572                        dev->name);
1573                 return;
1574         }
1575
1576         printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1577         hfa384x_disable_interrupts(dev);
1578         local->hw_resetting = 1;
1579         if (local->func->cor_sreset) {
1580                 /* Host system seems to hang in some cases with high traffic
1581                  * load or shared interrupts during COR sreset. Disable shared
1582                  * interrupts during reset to avoid these crashes. COS sreset
1583                  * takes quite a long time, so it is unfortunate that this
1584                  * seems to be needed. Anyway, I do not know of any better way
1585                  * of avoiding the crash. */
1586                 disable_irq(dev->irq);
1587                 local->func->cor_sreset(local);
1588                 enable_irq(dev->irq);
1589         }
1590         prism2_hw_shutdown(dev, 1);
1591         prism2_hw_config(dev, 0);
1592         local->hw_resetting = 0;
1593
1594 #ifdef PRISM2_DOWNLOAD_SUPPORT
1595         if (local->dl_pri) {
1596                 printk(KERN_DEBUG "%s: persistent download of primary "
1597                        "firmware\n", dev->name);
1598                 if (prism2_download_genesis(local, local->dl_pri) < 0)
1599                         printk(KERN_WARNING "%s: download (PRI) failed\n",
1600                                dev->name);
1601         }
1602
1603         if (local->dl_sec) {
1604                 printk(KERN_DEBUG "%s: persistent download of secondary "
1605                        "firmware\n", dev->name);
1606                 if (prism2_download_volatile(local, local->dl_sec) < 0)
1607                         printk(KERN_WARNING "%s: download (SEC) failed\n",
1608                                dev->name);
1609         }
1610 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1611
1612         /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1613 }
1614
1615
1616 static void prism2_schedule_reset(local_info_t *local)
1617 {
1618         schedule_work(&local->reset_queue);
1619 }
1620
1621
1622 /* Called only as scheduled task after noticing card timeout in interrupt
1623  * context */
1624 static void handle_reset_queue(struct work_struct *work)
1625 {
1626         local_info_t *local = container_of(work, local_info_t, reset_queue);
1627
1628         printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1629         prism2_hw_reset(local->dev);
1630
1631         if (netif_queue_stopped(local->dev)) {
1632                 int i;
1633
1634                 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1635                         if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1636                                 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1637                                        "wake up queue\n");
1638                                 netif_wake_queue(local->dev);
1639                                 break;
1640                         }
1641         }
1642 }
1643
1644
1645 static int prism2_get_txfid_idx(local_info_t *local)
1646 {
1647         int idx, end;
1648         unsigned long flags;
1649
1650         spin_lock_irqsave(&local->txfidlock, flags);
1651         end = idx = local->next_txfid;
1652         do {
1653                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1654                         local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1655                         spin_unlock_irqrestore(&local->txfidlock, flags);
1656                         return idx;
1657                 }
1658                 idx++;
1659                 if (idx >= PRISM2_TXFID_COUNT)
1660                         idx = 0;
1661         } while (idx != end);
1662         spin_unlock_irqrestore(&local->txfidlock, flags);
1663
1664         PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1665                "packet dropped\n");
1666         local->dev->stats.tx_dropped++;
1667
1668         return -1;
1669 }
1670
1671
1672 /* Called only from hardware IRQ */
1673 static void prism2_transmit_cb(struct net_device *dev, long context,
1674                                u16 resp0, u16 res)
1675 {
1676         struct hostap_interface *iface;
1677         local_info_t *local;
1678         int idx = (int) context;
1679
1680         iface = netdev_priv(dev);
1681         local = iface->local;
1682
1683         if (res) {
1684                 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1685                        dev->name, res);
1686                 return;
1687         }
1688
1689         if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1690                 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1691                        "idx=%d\n", dev->name, idx);
1692                 return;
1693         }
1694
1695         if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1696                 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1697                        "with no pending transmit\n", dev->name);
1698         }
1699
1700         if (netif_queue_stopped(dev)) {
1701                 /* ready for next TX, so wake up queue that was stopped in
1702                  * prism2_transmit() */
1703                 netif_wake_queue(dev);
1704         }
1705
1706         spin_lock(&local->txfidlock);
1707
1708         /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1709          * will be automatically allocated for the next TX frame */
1710         local->intransmitfid[idx] = resp0;
1711
1712         PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1713                "resp0=0x%04x, transmit_txfid=0x%04x\n",
1714                dev->name, idx, local->txfid[idx],
1715                resp0, local->intransmitfid[local->next_txfid]);
1716
1717         idx++;
1718         if (idx >= PRISM2_TXFID_COUNT)
1719                 idx = 0;
1720         local->next_txfid = idx;
1721
1722         /* check if all TX buffers are occupied */
1723         do {
1724                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1725                         spin_unlock(&local->txfidlock);
1726                         return;
1727                 }
1728                 idx++;
1729                 if (idx >= PRISM2_TXFID_COUNT)
1730                         idx = 0;
1731         } while (idx != local->next_txfid);
1732         spin_unlock(&local->txfidlock);
1733
1734         /* no empty TX buffers, stop queue */
1735         netif_stop_queue(dev);
1736 }
1737
1738
1739 /* Called only from software IRQ if PCI bus master is not used (with bus master
1740  * this can be called both from software and hardware IRQ) */
1741 static int prism2_transmit(struct net_device *dev, int idx)
1742 {
1743         struct hostap_interface *iface;
1744         local_info_t *local;
1745         int res;
1746
1747         iface = netdev_priv(dev);
1748         local = iface->local;
1749
1750         /* The driver tries to stop netif queue so that there would not be
1751          * more than one attempt to transmit frames going on; check that this
1752          * is really the case */
1753
1754         if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1755                 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1756                        "when previous TX was pending\n", dev->name);
1757                 return -1;
1758         }
1759
1760         /* stop the queue for the time that transmit is pending */
1761         netif_stop_queue(dev);
1762
1763         /* transmit packet */
1764         res = hfa384x_cmd_callback(
1765                 dev,
1766                 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1767                 local->txfid[idx],
1768                 prism2_transmit_cb, (long) idx);
1769
1770         if (res) {
1771                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1772                        "failed (res=%d)\n", dev->name, res);
1773                 dev->stats.tx_dropped++;
1774                 netif_wake_queue(dev);
1775                 return -1;
1776         }
1777         netif_trans_update(dev);
1778
1779         /* Since we did not wait for command completion, the card continues
1780          * to process on the background and we will finish handling when
1781          * command completion event is handled (prism2_cmd_ev() function) */
1782
1783         return 0;
1784 }
1785
1786
1787 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1788  * send the payload with this descriptor) */
1789 /* Called only from software IRQ */
1790 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1791 {
1792         struct hostap_interface *iface;
1793         local_info_t *local;
1794         struct hfa384x_tx_frame txdesc;
1795         struct hostap_skb_tx_data *meta;
1796         int hdr_len, data_len, idx, res, ret = -1;
1797         u16 tx_control;
1798
1799         iface = netdev_priv(dev);
1800         local = iface->local;
1801
1802         meta = (struct hostap_skb_tx_data *) skb->cb;
1803
1804         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1805
1806         if ((local->func->card_present && !local->func->card_present(local)) ||
1807             !local->hw_ready || local->hw_downloading || local->pri_only) {
1808                 if (net_ratelimit()) {
1809                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1810                                " skipping\n", dev->name);
1811                 }
1812                 goto fail;
1813         }
1814
1815         memset(&txdesc, 0, sizeof(txdesc));
1816
1817         /* skb->data starts with txdesc->frame_control */
1818         hdr_len = sizeof(txdesc.header);
1819         BUILD_BUG_ON(hdr_len != 24);
1820         skb_copy_from_linear_data(skb, &txdesc.header, hdr_len);
1821         if (ieee80211_is_data(txdesc.frame_control) &&
1822             ieee80211_has_a4(txdesc.frame_control) &&
1823             skb->len >= 30) {
1824                 /* Addr4 */
1825                 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1826                                                  ETH_ALEN);
1827                 hdr_len += ETH_ALEN;
1828         }
1829
1830         tx_control = local->tx_control;
1831         if (meta->tx_cb_idx) {
1832                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1833                 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1834         }
1835         txdesc.tx_control = cpu_to_le16(tx_control);
1836         txdesc.tx_rate = meta->rate;
1837
1838         data_len = skb->len - hdr_len;
1839         txdesc.data_len = cpu_to_le16(data_len);
1840         txdesc.len = cpu_to_be16(data_len);
1841
1842         idx = prism2_get_txfid_idx(local);
1843         if (idx < 0)
1844                 goto fail;
1845
1846         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1847                 hostap_dump_tx_header(dev->name, &txdesc);
1848
1849         spin_lock(&local->baplock);
1850         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1851
1852         if (!res)
1853                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1854         if (!res)
1855                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1856                                      skb->len - hdr_len);
1857         spin_unlock(&local->baplock);
1858
1859         if (!res)
1860                 res = prism2_transmit(dev, idx);
1861         if (res) {
1862                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1863                        dev->name);
1864                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1865                 schedule_work(&local->reset_queue);
1866                 goto fail;
1867         }
1868
1869         ret = 0;
1870
1871 fail:
1872         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1873         return ret;
1874 }
1875
1876
1877 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1878  * register has changed values between consecutive reads for an unknown reason.
1879  * This should really not happen, so more debugging is needed. This test
1880  * version is a bit slower, but it will detect most of such register changes
1881  * and will try to get the correct fid eventually. */
1882 #define EXTRA_FID_READ_TESTS
1883
1884 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1885 {
1886 #ifdef EXTRA_FID_READ_TESTS
1887         u16 val, val2, val3;
1888         int i;
1889
1890         for (i = 0; i < 10; i++) {
1891                 val = HFA384X_INW(reg);
1892                 val2 = HFA384X_INW(reg);
1893                 val3 = HFA384X_INW(reg);
1894
1895                 if (val == val2 && val == val3)
1896                         return val;
1897
1898                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1899                        " %04x %04x %04x\n",
1900                        dev->name, i, reg, val, val2, val3);
1901                 if ((val == val2 || val == val3) && val != 0)
1902                         return val;
1903                 if (val2 == val3 && val2 != 0)
1904                         return val2;
1905         }
1906         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1907                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1908         return val;
1909 #else /* EXTRA_FID_READ_TESTS */
1910         return HFA384X_INW(reg);
1911 #endif /* EXTRA_FID_READ_TESTS */
1912 }
1913
1914
1915 /* Called only as a tasklet (software IRQ) */
1916 static void prism2_rx(local_info_t *local)
1917 {
1918         struct net_device *dev = local->dev;
1919         int res, rx_pending = 0;
1920         u16 len, hdr_len, rxfid, status, macport;
1921         struct hfa384x_rx_frame rxdesc;
1922         struct sk_buff *skb = NULL;
1923
1924         prism2_callback(local, PRISM2_CALLBACK_RX_START);
1925
1926         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1927 #ifndef final_version
1928         if (rxfid == 0) {
1929                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1930                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1931                        rxfid);
1932                 if (rxfid == 0) {
1933                         schedule_work(&local->reset_queue);
1934                         goto rx_dropped;
1935                 }
1936                 /* try to continue with the new rxfid value */
1937         }
1938 #endif
1939
1940         spin_lock(&local->baplock);
1941         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1942         if (!res)
1943                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1944
1945         if (res) {
1946                 spin_unlock(&local->baplock);
1947                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1948                        res);
1949                 if (res == -ETIMEDOUT) {
1950                         schedule_work(&local->reset_queue);
1951                 }
1952                 goto rx_dropped;
1953         }
1954
1955         len = le16_to_cpu(rxdesc.data_len);
1956         hdr_len = sizeof(rxdesc);
1957         status = le16_to_cpu(rxdesc.status);
1958         macport = (status >> 8) & 0x07;
1959
1960         /* Drop frames with too large reported payload length. Monitor mode
1961          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1962          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1963          * macport 7 */
1964         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1965                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1966                         if (len >= (u16) -14) {
1967                                 hdr_len -= 65535 - len;
1968                                 hdr_len--;
1969                         }
1970                         len = 0;
1971                 } else {
1972                         spin_unlock(&local->baplock);
1973                         printk(KERN_DEBUG "%s: Received frame with invalid "
1974                                "length 0x%04x\n", dev->name, len);
1975                         hostap_dump_rx_header(dev->name, &rxdesc);
1976                         goto rx_dropped;
1977                 }
1978         }
1979
1980         skb = dev_alloc_skb(len + hdr_len);
1981         if (!skb) {
1982                 spin_unlock(&local->baplock);
1983                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
1984                        dev->name);
1985                 goto rx_dropped;
1986         }
1987         skb->dev = dev;
1988         skb_put_data(skb, &rxdesc, hdr_len);
1989
1990         if (len > 0)
1991                 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
1992         spin_unlock(&local->baplock);
1993         if (res) {
1994                 printk(KERN_DEBUG "%s: RX failed to read "
1995                        "frame data\n", dev->name);
1996                 goto rx_dropped;
1997         }
1998
1999         skb_queue_tail(&local->rx_list, skb);
2000         tasklet_schedule(&local->rx_tasklet);
2001
2002  rx_exit:
2003         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2004         if (!rx_pending) {
2005                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2006         }
2007
2008         return;
2009
2010  rx_dropped:
2011         dev->stats.rx_dropped++;
2012         if (skb)
2013                 dev_kfree_skb(skb);
2014         goto rx_exit;
2015 }
2016
2017
2018 /* Called only as a tasklet (software IRQ) */
2019 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2020 {
2021         struct hfa384x_rx_frame *rxdesc;
2022         struct net_device *dev = skb->dev;
2023         struct hostap_80211_rx_status stats;
2024         int hdrlen, rx_hdrlen;
2025
2026         rx_hdrlen = sizeof(*rxdesc);
2027         if (skb->len < sizeof(*rxdesc)) {
2028                 /* Allow monitor mode to receive shorter frames */
2029                 if (local->iw_mode == IW_MODE_MONITOR &&
2030                     skb->len >= sizeof(*rxdesc) - 30) {
2031                         rx_hdrlen = skb->len;
2032                 } else {
2033                         dev_kfree_skb(skb);
2034                         return;
2035                 }
2036         }
2037
2038         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2039
2040         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2041             skb->len >= sizeof(*rxdesc))
2042                 hostap_dump_rx_header(dev->name, rxdesc);
2043
2044         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2045             (!local->monitor_allow_fcserr ||
2046              local->iw_mode != IW_MODE_MONITOR))
2047                 goto drop;
2048
2049         if (skb->len > PRISM2_DATA_MAXLEN) {
2050                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2051                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2052                 goto drop;
2053         }
2054
2055         stats.mac_time = le32_to_cpu(rxdesc->time);
2056         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2057         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2058         stats.rate = rxdesc->rate;
2059
2060         /* Convert Prism2 RX structure into IEEE 802.11 header */
2061         hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2062         if (hdrlen > rx_hdrlen)
2063                 hdrlen = rx_hdrlen;
2064
2065         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2066                 &rxdesc->frame_control, hdrlen);
2067
2068         hostap_80211_rx(dev, skb, &stats);
2069         return;
2070
2071  drop:
2072         dev_kfree_skb(skb);
2073 }
2074
2075
2076 /* Called only as a tasklet (software IRQ) */
2077 static void hostap_rx_tasklet(struct tasklet_struct *t)
2078 {
2079         local_info_t *local = from_tasklet(local, t, rx_tasklet);
2080         struct sk_buff *skb;
2081
2082         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2083                 hostap_rx_skb(local, skb);
2084 }
2085
2086
2087 /* Called only from hardware IRQ */
2088 static void prism2_alloc_ev(struct net_device *dev)
2089 {
2090         struct hostap_interface *iface;
2091         local_info_t *local;
2092         int idx;
2093         u16 fid;
2094
2095         iface = netdev_priv(dev);
2096         local = iface->local;
2097
2098         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2099
2100         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2101
2102         spin_lock(&local->txfidlock);
2103         idx = local->next_alloc;
2104
2105         do {
2106                 if (local->txfid[idx] == fid) {
2107                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2108                                idx);
2109
2110 #ifndef final_version
2111                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2112                                 printk("Already released txfid found at idx "
2113                                        "%d\n", idx);
2114                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2115                                 printk("Already reserved txfid found at idx "
2116                                        "%d\n", idx);
2117 #endif
2118                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2119                         idx++;
2120                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2121                                 idx;
2122
2123                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2124                             netif_queue_stopped(dev))
2125                                 netif_wake_queue(dev);
2126
2127                         spin_unlock(&local->txfidlock);
2128                         return;
2129                 }
2130
2131                 idx++;
2132                 if (idx >= PRISM2_TXFID_COUNT)
2133                         idx = 0;
2134         } while (idx != local->next_alloc);
2135
2136         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2137                "read 0x%04x) for alloc event\n", dev->name, fid,
2138                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2139         printk(KERN_DEBUG "TXFIDs:");
2140         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2141                 printk(" %04x[%04x]", local->txfid[idx],
2142                        local->intransmitfid[idx]);
2143         printk("\n");
2144         spin_unlock(&local->txfidlock);
2145
2146         /* FIX: should probably schedule reset; reference to one txfid was lost
2147          * completely.. Bad things will happen if we run out of txfids
2148          * Actually, this will cause netdev watchdog to notice TX timeout and
2149          * then card reset after all txfids have been leaked. */
2150 }
2151
2152
2153 /* Called only as a tasklet (software IRQ) */
2154 static void hostap_tx_callback(local_info_t *local,
2155                                struct hfa384x_tx_frame *txdesc, int ok,
2156                                char *payload)
2157 {
2158         u16 sw_support, hdrlen, len;
2159         struct sk_buff *skb;
2160         struct hostap_tx_callback_info *cb;
2161
2162         /* Make sure that frame was from us. */
2163         if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2164                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2165                        local->dev->name);
2166                 return;
2167         }
2168
2169         sw_support = le32_to_cpu(txdesc->sw_support);
2170
2171         spin_lock(&local->lock);
2172         cb = local->tx_callback;
2173         while (cb != NULL && cb->idx != sw_support)
2174                 cb = cb->next;
2175         spin_unlock(&local->lock);
2176
2177         if (cb == NULL) {
2178                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2179                        local->dev->name, sw_support);
2180                 return;
2181         }
2182
2183         hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2184         len = le16_to_cpu(txdesc->data_len);
2185         skb = dev_alloc_skb(hdrlen + len);
2186         if (skb == NULL) {
2187                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2188                        "skb\n", local->dev->name);
2189                 return;
2190         }
2191
2192         skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2193         if (payload)
2194                 skb_put_data(skb, payload, len);
2195
2196         skb->dev = local->dev;
2197         skb_reset_mac_header(skb);
2198
2199         cb->func(skb, ok, cb->data);
2200 }
2201
2202
2203 /* Called only as a tasklet (software IRQ) */
2204 static int hostap_tx_compl_read(local_info_t *local, int error,
2205                                 struct hfa384x_tx_frame *txdesc,
2206                                 char **payload)
2207 {
2208         u16 fid, len;
2209         int res, ret = 0;
2210         struct net_device *dev = local->dev;
2211
2212         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2213
2214         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2215
2216         spin_lock(&local->baplock);
2217         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2218         if (!res)
2219                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2220         if (res) {
2221                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2222                        "read txdesc\n", dev->name, error, fid);
2223                 if (res == -ETIMEDOUT) {
2224                         schedule_work(&local->reset_queue);
2225                 }
2226                 ret = -1;
2227                 goto fail;
2228         }
2229         if (txdesc->sw_support) {
2230                 len = le16_to_cpu(txdesc->data_len);
2231                 if (len < PRISM2_DATA_MAXLEN) {
2232                         *payload = kmalloc(len, GFP_ATOMIC);
2233                         if (*payload == NULL ||
2234                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2235                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2236                                        "frame payload\n", dev->name);
2237                                 kfree(*payload);
2238                                 *payload = NULL;
2239                                 ret = -1;
2240                                 goto fail;
2241                         }
2242                 }
2243         }
2244
2245  fail:
2246         spin_unlock(&local->baplock);
2247
2248         return ret;
2249 }
2250
2251
2252 /* Called only as a tasklet (software IRQ) */
2253 static void prism2_tx_ev(local_info_t *local)
2254 {
2255         struct net_device *dev = local->dev;
2256         char *payload = NULL;
2257         struct hfa384x_tx_frame txdesc;
2258
2259         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2260                 goto fail;
2261
2262         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2263                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2264                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2265                        "duration_id=%d\n",
2266                        dev->name, le16_to_cpu(txdesc.status),
2267                        txdesc.retry_count, txdesc.tx_rate,
2268                        le16_to_cpu(txdesc.seq_ctrl),
2269                        le16_to_cpu(txdesc.duration_id));
2270         }
2271
2272         if (txdesc.sw_support)
2273                 hostap_tx_callback(local, &txdesc, 1, payload);
2274         kfree(payload);
2275
2276  fail:
2277         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2278 }
2279
2280
2281 /* Called only as a tasklet (software IRQ) */
2282 static void hostap_sta_tx_exc_tasklet(struct tasklet_struct *t)
2283 {
2284         local_info_t *local = from_tasklet(local, t, sta_tx_exc_tasklet);
2285         struct sk_buff *skb;
2286
2287         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2288                 struct hfa384x_tx_frame *txdesc =
2289                         (struct hfa384x_tx_frame *) skb->data;
2290
2291                 if (skb->len >= sizeof(*txdesc)) {
2292                         /* Convert Prism2 RX structure into IEEE 802.11 header
2293                          */
2294                         int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2295                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2296                                 &txdesc->frame_control, hdrlen);
2297
2298                         hostap_handle_sta_tx_exc(local, skb);
2299                 }
2300                 dev_kfree_skb(skb);
2301         }
2302 }
2303
2304
2305 /* Called only as a tasklet (software IRQ) */
2306 static void prism2_txexc(local_info_t *local)
2307 {
2308         struct net_device *dev = local->dev;
2309         u16 status, fc;
2310         int show_dump, res;
2311         char *payload = NULL;
2312         struct hfa384x_tx_frame txdesc;
2313
2314         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2315         dev->stats.tx_errors++;
2316
2317         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2318         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2319         if (res)
2320                 return;
2321
2322         status = le16_to_cpu(txdesc.status);
2323
2324         /* We produce a TXDROP event only for retry or lifetime
2325          * exceeded, because that's the only status that really mean
2326          * that this particular node went away.
2327          * Other errors means that *we* screwed up. - Jean II */
2328         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2329         {
2330                 union iwreq_data wrqu;
2331
2332                 /* Copy 802.11 dest address. */
2333                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2334                 wrqu.addr.sa_family = ARPHRD_ETHER;
2335                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2336         } else
2337                 show_dump = 1;
2338
2339         if (local->iw_mode == IW_MODE_MASTER ||
2340             local->iw_mode == IW_MODE_REPEAT ||
2341             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2342                 struct sk_buff *skb;
2343                 skb = dev_alloc_skb(sizeof(txdesc));
2344                 if (skb) {
2345                         skb_put_data(skb, &txdesc, sizeof(txdesc));
2346                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2347                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2348                 }
2349         }
2350
2351         if (txdesc.sw_support)
2352                 hostap_tx_callback(local, &txdesc, 0, payload);
2353         kfree(payload);
2354
2355         if (!show_dump)
2356                 return;
2357
2358         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2359                " tx_control=%04x\n",
2360                dev->name, status,
2361                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2362                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2363                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2364                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2365                le16_to_cpu(txdesc.tx_control));
2366
2367         fc = le16_to_cpu(txdesc.frame_control);
2368         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2369                "(%s%s%s::%d%s%s)\n",
2370                txdesc.retry_count, txdesc.tx_rate, fc,
2371                ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2372                ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2373                ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2374                (fc & IEEE80211_FCTL_STYPE) >> 4,
2375                ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2376                ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2377         PDEBUG(DEBUG_EXTRA, "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
2378                txdesc.addr1, txdesc.addr2,
2379                txdesc.addr3, txdesc.addr4);
2380 }
2381
2382
2383 /* Called only as a tasklet (software IRQ) */
2384 static void hostap_info_tasklet(struct tasklet_struct *t)
2385 {
2386         local_info_t *local = from_tasklet(local, t, info_tasklet);
2387         struct sk_buff *skb;
2388
2389         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2390                 hostap_info_process(local, skb);
2391                 dev_kfree_skb(skb);
2392         }
2393 }
2394
2395
2396 /* Called only as a tasklet (software IRQ) */
2397 static void prism2_info(local_info_t *local)
2398 {
2399         struct net_device *dev = local->dev;
2400         u16 fid;
2401         int res, left;
2402         struct hfa384x_info_frame info;
2403         struct sk_buff *skb;
2404
2405         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2406
2407         spin_lock(&local->baplock);
2408         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2409         if (!res)
2410                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2411         if (res) {
2412                 spin_unlock(&local->baplock);
2413                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2414                        fid);
2415                 if (res == -ETIMEDOUT) {
2416                         schedule_work(&local->reset_queue);
2417                 }
2418                 goto out;
2419         }
2420
2421         left = (le16_to_cpu(info.len) - 1) * 2;
2422
2423         if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2424                 /* data register seems to give 0x8000 in some error cases even
2425                  * though busy bit is not set in offset register;
2426                  * in addition, length must be at least 1 due to type field */
2427                 spin_unlock(&local->baplock);
2428                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2429                        "length 0x%04x (type 0x%04x)\n", dev->name,
2430                        le16_to_cpu(info.len), le16_to_cpu(info.type));
2431                 goto out;
2432         }
2433
2434         skb = dev_alloc_skb(sizeof(info) + left);
2435         if (skb == NULL) {
2436                 spin_unlock(&local->baplock);
2437                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2438                        "frame\n", dev->name);
2439                 goto out;
2440         }
2441
2442         skb_put_data(skb, &info, sizeof(info));
2443         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2444         {
2445                 spin_unlock(&local->baplock);
2446                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2447                        "len=0x%04x, type=0x%04x\n", dev->name, fid,
2448                        le16_to_cpu(info.len), le16_to_cpu(info.type));
2449                 dev_kfree_skb(skb);
2450                 goto out;
2451         }
2452         spin_unlock(&local->baplock);
2453
2454         skb_queue_tail(&local->info_list, skb);
2455         tasklet_schedule(&local->info_tasklet);
2456
2457  out:
2458         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2459 }
2460
2461
2462 /* Called only as a tasklet (software IRQ) */
2463 static void hostap_bap_tasklet(struct tasklet_struct *t)
2464 {
2465         local_info_t *local = from_tasklet(local, t, bap_tasklet);
2466         struct net_device *dev = local->dev;
2467         u16 ev;
2468         int frames = 30;
2469
2470         if (local->func->card_present && !local->func->card_present(local))
2471                 return;
2472
2473         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2474
2475         /* Process all pending BAP events without generating new interrupts
2476          * for them */
2477         while (frames-- > 0) {
2478                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2479                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2480                         break;
2481                 if (ev & HFA384X_EV_RX)
2482                         prism2_rx(local);
2483                 if (ev & HFA384X_EV_INFO)
2484                         prism2_info(local);
2485                 if (ev & HFA384X_EV_TX)
2486                         prism2_tx_ev(local);
2487                 if (ev & HFA384X_EV_TXEXC)
2488                         prism2_txexc(local);
2489         }
2490
2491         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2492         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2493
2494         /* Enable interrupts for new BAP events */
2495         hfa384x_events_all(dev);
2496         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2497 }
2498
2499
2500 /* Called only from hardware IRQ */
2501 static void prism2_infdrop(struct net_device *dev)
2502 {
2503         static unsigned long last_inquire = 0;
2504
2505         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2506
2507         /* some firmware versions seem to get stuck with
2508          * full CommTallies in high traffic load cases; every
2509          * packet will then cause INFDROP event and CommTallies
2510          * info frame will not be sent automatically. Try to
2511          * get out of this state by inquiring CommTallies. */
2512         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2513                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2514                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2515                 last_inquire = jiffies;
2516         }
2517 }
2518
2519
2520 /* Called only from hardware IRQ */
2521 static void prism2_ev_tick(struct net_device *dev)
2522 {
2523         struct hostap_interface *iface;
2524         local_info_t *local;
2525         u16 evstat, inten;
2526         static int prev_stuck = 0;
2527
2528         iface = netdev_priv(dev);
2529         local = iface->local;
2530
2531         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2532             local->last_tick_timer) {
2533                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2534                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2535                 if (!prev_stuck) {
2536                         printk(KERN_INFO "%s: SW TICK stuck? "
2537                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2538                                dev->name, local->bits, evstat, inten);
2539                 }
2540                 local->sw_tick_stuck++;
2541                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2542                     (inten & HFA384X_BAP0_EVENTS)) {
2543                         printk(KERN_INFO "%s: trying to recover from IRQ "
2544                                "hang\n", dev->name);
2545                         hfa384x_events_no_bap0(dev);
2546                 }
2547                 prev_stuck = 1;
2548         } else
2549                 prev_stuck = 0;
2550 }
2551
2552
2553 /* Called only from hardware IRQ */
2554 static void prism2_check_magic(local_info_t *local)
2555 {
2556         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2557          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2558          * register once or twice seems to get the correct value.. PCI cards
2559          * cannot anyway be removed during normal operation, so there is not
2560          * really any need for this verification with them. */
2561
2562 #ifndef PRISM2_PCI
2563 #ifndef final_version
2564         static unsigned long last_magic_err = 0;
2565         struct net_device *dev = local->dev;
2566
2567         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2568                 if (!local->hw_ready)
2569                         return;
2570                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2571                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2572                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2573                                "%04X != %04X - card removed?\n", dev->name,
2574                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2575                                HFA384X_MAGIC);
2576                         last_magic_err = jiffies;
2577                 } else if (net_ratelimit()) {
2578                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2579                                "MAGIC=%04x\n", dev->name,
2580                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2581                                HFA384X_MAGIC);
2582                 }
2583                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2584                         schedule_work(&local->reset_queue);
2585                 return;
2586         }
2587 #endif /* final_version */
2588 #endif /* !PRISM2_PCI */
2589 }
2590
2591
2592 /* Called only from hardware IRQ */
2593 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2594 {
2595         struct net_device *dev = dev_id;
2596         struct hostap_interface *iface;
2597         local_info_t *local;
2598         int events = 0;
2599         u16 ev;
2600
2601         iface = netdev_priv(dev);
2602         local = iface->local;
2603
2604         /* Detect early interrupt before driver is fully configured */
2605         spin_lock(&local->irq_init_lock);
2606         if (!dev->base_addr) {
2607                 if (net_ratelimit()) {
2608                         printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2609                                dev->name);
2610                 }
2611                 spin_unlock(&local->irq_init_lock);
2612                 return IRQ_HANDLED;
2613         }
2614         spin_unlock(&local->irq_init_lock);
2615
2616         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2617
2618         if (local->func->card_present && !local->func->card_present(local)) {
2619                 if (net_ratelimit()) {
2620                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2621                                dev->name);
2622                 }
2623                 return IRQ_HANDLED;
2624         }
2625
2626         prism2_check_magic(local);
2627
2628         for (;;) {
2629                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2630                 if (ev == 0xffff) {
2631                         if (local->shutdown)
2632                                 return IRQ_HANDLED;
2633                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2634                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2635                                dev->name);
2636                         return IRQ_HANDLED;
2637                 }
2638
2639                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2640                 if (ev == 0)
2641                         break;
2642
2643                 if (ev & HFA384X_EV_CMD) {
2644                         prism2_cmd_ev(dev);
2645                 }
2646
2647                 /* Above events are needed even before hw is ready, but other
2648                  * events should be skipped during initialization. This may
2649                  * change for AllocEv if allocate_fid is implemented without
2650                  * busy waiting. */
2651                 if (!local->hw_ready || local->hw_resetting ||
2652                     !local->dev_enabled) {
2653                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2654                         if (ev & HFA384X_EV_CMD)
2655                                 goto next_event;
2656                         if ((ev & HFA384X_EVENT_MASK) == 0)
2657                                 return IRQ_HANDLED;
2658                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2659                             net_ratelimit()) {
2660                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2661                                        "not ready; skipping events 0x%04x "
2662                                        "(IntEn=0x%04x)%s%s%s\n",
2663                                        dev->name, ev,
2664                                        HFA384X_INW(HFA384X_INTEN_OFF),
2665                                        !local->hw_ready ? " (!hw_ready)" : "",
2666                                        local->hw_resetting ?
2667                                        " (hw_resetting)" : "",
2668                                        !local->dev_enabled ?
2669                                        " (!dev_enabled)" : "");
2670                         }
2671                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2672                         return IRQ_HANDLED;
2673                 }
2674
2675                 if (ev & HFA384X_EV_TICK) {
2676                         prism2_ev_tick(dev);
2677                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2678                 }
2679
2680                 if (ev & HFA384X_EV_ALLOC) {
2681                         prism2_alloc_ev(dev);
2682                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2683                 }
2684
2685                 /* Reading data from the card is quite time consuming, so do it
2686                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2687                  * and unmasked after needed data has been read completely. */
2688                 if (ev & HFA384X_BAP0_EVENTS) {
2689                         hfa384x_events_no_bap0(dev);
2690                         tasklet_schedule(&local->bap_tasklet);
2691                 }
2692
2693 #ifndef final_version
2694                 if (ev & HFA384X_EV_WTERR) {
2695                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2696                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2697                 }
2698 #endif /* final_version */
2699
2700                 if (ev & HFA384X_EV_INFDROP) {
2701                         prism2_infdrop(dev);
2702                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2703                 }
2704
2705         next_event:
2706                 events++;
2707                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2708                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2709                                "(EvStat=0x%04x)\n",
2710                                PRISM2_MAX_INTERRUPT_EVENTS,
2711                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2712                         break;
2713                 }
2714         }
2715         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2716         return IRQ_RETVAL(events);
2717 }
2718
2719
2720 static void prism2_check_sta_fw_version(local_info_t *local)
2721 {
2722         struct hfa384x_comp_ident comp;
2723         int id, variant, major, minor;
2724
2725         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2726                             &comp, sizeof(comp), 1) < 0)
2727                 return;
2728
2729         local->fw_ap = 0;
2730         id = le16_to_cpu(comp.id);
2731         if (id != HFA384X_COMP_ID_STA) {
2732                 if (id == HFA384X_COMP_ID_FW_AP)
2733                         local->fw_ap = 1;
2734                 return;
2735         }
2736
2737         major = __le16_to_cpu(comp.major);
2738         minor = __le16_to_cpu(comp.minor);
2739         variant = __le16_to_cpu(comp.variant);
2740         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2741
2742         /* Station firmware versions before 1.4.x seem to have a bug in
2743          * firmware-based WEP encryption when using Host AP mode, so use
2744          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2745          * first one that has been seen to produce correct encryption, but the
2746          * bug might be fixed before that (although, at least 1.4.2 is broken).
2747          */
2748         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2749
2750         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2751             !local->fw_encrypt_ok) {
2752                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2753                        "a workaround for firmware bug in Host AP mode WEP\n",
2754                        local->dev->name);
2755                 local->host_encrypt = 1;
2756         }
2757
2758         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2759          * in station firmware versions before 1.5.x. With these versions, the
2760          * driver uses a workaround with bogus frame format (4th address after
2761          * the payload). This is not compatible with other AP devices. Since
2762          * the firmware bug is fixed in the latest station firmware versions,
2763          * automatically enable standard compliant mode for cards using station
2764          * firmware version 1.5.0 or newer. */
2765         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2766                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2767         else {
2768                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2769                        "workaround for firmware bug in Host AP mode WDS\n",
2770                        local->dev->name);
2771         }
2772
2773         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2774 }
2775
2776
2777 static void hostap_passive_scan(struct timer_list *t)
2778 {
2779         local_info_t *local = from_timer(local, t, passive_scan_timer);
2780         struct net_device *dev = local->dev;
2781         u16 chan;
2782
2783         if (local->passive_scan_interval <= 0)
2784                 return;
2785
2786         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2787                 int max_tries = 16;
2788
2789                 /* Even though host system does not really know when the WLAN
2790                  * MAC is sending frames, try to avoid changing channels for
2791                  * passive scanning when a host-generated frame is being
2792                  * transmitted */
2793                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2794                         printk(KERN_DEBUG "%s: passive scan detected pending "
2795                                "TX - delaying\n", dev->name);
2796                         local->passive_scan_timer.expires = jiffies + HZ / 10;
2797                         add_timer(&local->passive_scan_timer);
2798                         return;
2799                 }
2800
2801                 do {
2802                         local->passive_scan_channel++;
2803                         if (local->passive_scan_channel > 14)
2804                                 local->passive_scan_channel = 1;
2805                         max_tries--;
2806                 } while (!(local->channel_mask &
2807                            (1 << (local->passive_scan_channel - 1))) &&
2808                          max_tries > 0);
2809
2810                 if (max_tries == 0) {
2811                         printk(KERN_INFO "%s: no allowed passive scan channels"
2812                                " found\n", dev->name);
2813                         return;
2814                 }
2815
2816                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2817                        dev->name, local->passive_scan_channel);
2818                 chan = local->passive_scan_channel;
2819                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2820                 local->passive_scan_timer.expires = jiffies + HZ / 10;
2821         } else {
2822                 chan = local->channel;
2823                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2824                 local->passive_scan_timer.expires = jiffies +
2825                         local->passive_scan_interval * HZ;
2826         }
2827
2828         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2829                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
2830                                  chan, NULL, 0))
2831                 printk(KERN_ERR "%s: passive scan channel set %d "
2832                        "failed\n", dev->name, chan);
2833
2834         add_timer(&local->passive_scan_timer);
2835 }
2836
2837
2838 /* Called only as a scheduled task when communications quality values should
2839  * be updated. */
2840 static void handle_comms_qual_update(struct work_struct *work)
2841 {
2842         local_info_t *local =
2843                 container_of(work, local_info_t, comms_qual_update);
2844         prism2_update_comms_qual(local->dev);
2845 }
2846
2847
2848 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2849  * used to monitor that local->last_tick_timer is being updated. If not,
2850  * interrupt busy-loop is assumed and driver tries to recover by masking out
2851  * some events. */
2852 static void hostap_tick_timer(struct timer_list *t)
2853 {
2854         static unsigned long last_inquire = 0;
2855         local_info_t *local = from_timer(local, t, tick_timer);
2856         local->last_tick_timer = jiffies;
2857
2858         /* Inquire CommTallies every 10 seconds to keep the statistics updated
2859          * more often during low load and when using 32-bit tallies. */
2860         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2861             !local->hw_downloading && local->hw_ready &&
2862             !local->hw_resetting && local->dev_enabled) {
2863                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2864                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2865                 last_inquire = jiffies;
2866         }
2867
2868         if ((local->last_comms_qual_update == 0 ||
2869              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2870             (local->iw_mode == IW_MODE_INFRA ||
2871              local->iw_mode == IW_MODE_ADHOC)) {
2872                 schedule_work(&local->comms_qual_update);
2873         }
2874
2875         local->tick_timer.expires = jiffies + 2 * HZ;
2876         add_timer(&local->tick_timer);
2877 }
2878
2879
2880 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
2881 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
2882 {
2883         return HFA384X_INW(reg);
2884 }
2885
2886 static int prism2_registers_proc_show(struct seq_file *m, void *v)
2887 {
2888         local_info_t *local = m->private;
2889
2890 #define SHOW_REG(n) \
2891   seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2892
2893         SHOW_REG(CMD);
2894         SHOW_REG(PARAM0);
2895         SHOW_REG(PARAM1);
2896         SHOW_REG(PARAM2);
2897         SHOW_REG(STATUS);
2898         SHOW_REG(RESP0);
2899         SHOW_REG(RESP1);
2900         SHOW_REG(RESP2);
2901         SHOW_REG(INFOFID);
2902         SHOW_REG(CONTROL);
2903         SHOW_REG(SELECT0);
2904         SHOW_REG(SELECT1);
2905         SHOW_REG(OFFSET0);
2906         SHOW_REG(OFFSET1);
2907         SHOW_REG(RXFID);
2908         SHOW_REG(ALLOCFID);
2909         SHOW_REG(TXCOMPLFID);
2910         SHOW_REG(SWSUPPORT0);
2911         SHOW_REG(SWSUPPORT1);
2912         SHOW_REG(SWSUPPORT2);
2913         SHOW_REG(EVSTAT);
2914         SHOW_REG(INTEN);
2915         SHOW_REG(EVACK);
2916         /* Do not read data registers, because they change the state of the
2917          * MAC (offset += 2) */
2918         /* SHOW_REG(DATA0); */
2919         /* SHOW_REG(DATA1); */
2920         SHOW_REG(AUXPAGE);
2921         SHOW_REG(AUXOFFSET);
2922         /* SHOW_REG(AUXDATA); */
2923 #ifdef PRISM2_PCI
2924         SHOW_REG(PCICOR);
2925         SHOW_REG(PCIHCR);
2926         SHOW_REG(PCI_M0_ADDRH);
2927         SHOW_REG(PCI_M0_ADDRL);
2928         SHOW_REG(PCI_M0_LEN);
2929         SHOW_REG(PCI_M0_CTL);
2930         SHOW_REG(PCI_STATUS);
2931         SHOW_REG(PCI_M1_ADDRH);
2932         SHOW_REG(PCI_M1_ADDRL);
2933         SHOW_REG(PCI_M1_LEN);
2934         SHOW_REG(PCI_M1_CTL);
2935 #endif /* PRISM2_PCI */
2936
2937         return 0;
2938 }
2939 #endif
2940
2941 struct set_tim_data {
2942         struct list_head list;
2943         int aid;
2944         int set;
2945 };
2946
2947 static int prism2_set_tim(struct net_device *dev, int aid, int set)
2948 {
2949         struct list_head *ptr;
2950         struct set_tim_data *new_entry;
2951         struct hostap_interface *iface;
2952         local_info_t *local;
2953
2954         iface = netdev_priv(dev);
2955         local = iface->local;
2956
2957         new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2958         if (new_entry == NULL)
2959                 return -ENOMEM;
2960
2961         new_entry->aid = aid;
2962         new_entry->set = set;
2963
2964         spin_lock_bh(&local->set_tim_lock);
2965         list_for_each(ptr, &local->set_tim_list) {
2966                 struct set_tim_data *entry =
2967                         list_entry(ptr, struct set_tim_data, list);
2968                 if (entry->aid == aid) {
2969                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2970                                "set=%d ==> %d\n",
2971                                local->dev->name, aid, entry->set, set);
2972                         entry->set = set;
2973                         kfree(new_entry);
2974                         new_entry = NULL;
2975                         break;
2976                 }
2977         }
2978         if (new_entry)
2979                 list_add_tail(&new_entry->list, &local->set_tim_list);
2980         spin_unlock_bh(&local->set_tim_lock);
2981
2982         schedule_work(&local->set_tim_queue);
2983
2984         return 0;
2985 }
2986
2987
2988 static void handle_set_tim_queue(struct work_struct *work)
2989 {
2990         local_info_t *local = container_of(work, local_info_t, set_tim_queue);
2991         struct set_tim_data *entry;
2992         u16 val;
2993
2994         for (;;) {
2995                 entry = NULL;
2996                 spin_lock_bh(&local->set_tim_lock);
2997                 if (!list_empty(&local->set_tim_list)) {
2998                         entry = list_entry(local->set_tim_list.next,
2999                                            struct set_tim_data, list);
3000                         list_del(&entry->list);
3001                 }
3002                 spin_unlock_bh(&local->set_tim_lock);
3003                 if (!entry)
3004                         break;
3005
3006                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3007                        local->dev->name, entry->aid, entry->set);
3008
3009                 val = entry->aid;
3010                 if (entry->set)
3011                         val |= 0x8000;
3012                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3013                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3014                                "set=%d)\n",
3015                                local->dev->name, entry->aid, entry->set);
3016                 }
3017
3018                 kfree(entry);
3019         }
3020 }
3021
3022
3023 static void prism2_clear_set_tim_queue(local_info_t *local)
3024 {
3025         struct list_head *ptr, *n;
3026
3027         list_for_each_safe(ptr, n, &local->set_tim_list) {
3028                 struct set_tim_data *entry;
3029                 entry = list_entry(ptr, struct set_tim_data, list);
3030                 list_del(&entry->list);
3031                 kfree(entry);
3032         }
3033 }
3034
3035
3036 /*
3037  * HostAP uses two layers of net devices, where the inner
3038  * layer gets called all the time from the outer layer.
3039  * This is a natural nesting, which needs a split lock type.
3040  */
3041 static struct lock_class_key hostap_netdev_xmit_lock_key;
3042 static struct lock_class_key hostap_netdev_addr_lock_key;
3043
3044 static void prism2_set_lockdep_class_one(struct net_device *dev,
3045                                          struct netdev_queue *txq,
3046                                          void *_unused)
3047 {
3048         lockdep_set_class(&txq->_xmit_lock,
3049                           &hostap_netdev_xmit_lock_key);
3050 }
3051
3052 static void prism2_set_lockdep_class(struct net_device *dev)
3053 {
3054         lockdep_set_class(&dev->addr_list_lock,
3055                           &hostap_netdev_addr_lock_key);
3056         netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
3057 }
3058
3059 static struct net_device *
3060 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3061                        struct device *sdev)
3062 {
3063         struct net_device *dev;
3064         struct hostap_interface *iface;
3065         struct local_info *local;
3066         int len, i, ret;
3067
3068         if (funcs == NULL)
3069                 return NULL;
3070
3071         len = strlen(dev_template);
3072         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3073                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3074                        dev_template);
3075                 return NULL;
3076         }
3077
3078         len = sizeof(struct hostap_interface) +
3079                 3 + sizeof(struct local_info) +
3080                 3 + sizeof(struct ap_data);
3081
3082         dev = alloc_etherdev(len);
3083         if (dev == NULL)
3084                 return NULL;
3085
3086         iface = netdev_priv(dev);
3087         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3088         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3089         local->dev = iface->dev = dev;
3090         iface->local = local;
3091         iface->type = HOSTAP_INTERFACE_MASTER;
3092         INIT_LIST_HEAD(&local->hostap_interfaces);
3093
3094         local->hw_module = THIS_MODULE;
3095
3096 #ifdef PRISM2_IO_DEBUG
3097         local->io_debug_enabled = 1;
3098 #endif /* PRISM2_IO_DEBUG */
3099
3100         local->func = funcs;
3101         local->func->cmd = hfa384x_cmd;
3102         local->func->read_regs = hfa384x_read_regs;
3103         local->func->get_rid = hfa384x_get_rid;
3104         local->func->set_rid = hfa384x_set_rid;
3105         local->func->hw_enable = prism2_hw_enable;
3106         local->func->hw_config = prism2_hw_config;
3107         local->func->hw_reset = prism2_hw_reset;
3108         local->func->hw_shutdown = prism2_hw_shutdown;
3109         local->func->reset_port = prism2_reset_port;
3110         local->func->schedule_reset = prism2_schedule_reset;
3111 #ifdef PRISM2_DOWNLOAD_SUPPORT
3112         local->func->read_aux_proc_ops = &prism2_download_aux_dump_proc_ops;
3113         local->func->download = prism2_download;
3114 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3115         local->func->tx = prism2_tx_80211;
3116         local->func->set_tim = prism2_set_tim;
3117         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3118                                             * skb->data (FIX: maybe for DMA bus
3119                                             * mastering? */
3120
3121         local->mtu = mtu;
3122
3123         rwlock_init(&local->iface_lock);
3124         spin_lock_init(&local->txfidlock);
3125         spin_lock_init(&local->cmdlock);
3126         spin_lock_init(&local->baplock);
3127         spin_lock_init(&local->lock);
3128         spin_lock_init(&local->irq_init_lock);
3129         mutex_init(&local->rid_bap_mtx);
3130
3131         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3132                 card_idx = 0;
3133         local->card_idx = card_idx;
3134
3135         len = strlen(essid);
3136         memcpy(local->essid, essid,
3137                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3138         local->essid[MAX_SSID_LEN] = '\0';
3139         i = GET_INT_PARM(iw_mode, card_idx);
3140         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3141             i == IW_MODE_MONITOR) {
3142                 local->iw_mode = i;
3143         } else {
3144                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3145                        "IW_MODE_MASTER\n", i);
3146                 local->iw_mode = IW_MODE_MASTER;
3147         }
3148         local->channel = GET_INT_PARM(channel, card_idx);
3149         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3150         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3151         local->wds_max_connections = 16;
3152         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3153         local->manual_retry_count = -1;
3154         local->rts_threshold = 2347;
3155         local->fragm_threshold = 2346;
3156         local->rssi_to_dBm = 100; /* default; to be overriden by
3157                                    * cnfDbmAdjust, if available */
3158         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3159         local->sram_type = -1;
3160         local->scan_channel_mask = 0xffff;
3161         local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3162
3163         /* Initialize task queue structures */
3164         INIT_WORK(&local->reset_queue, handle_reset_queue);
3165         INIT_WORK(&local->set_multicast_list_queue,
3166                   hostap_set_multicast_list_queue);
3167
3168         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3169         INIT_LIST_HEAD(&local->set_tim_list);
3170         spin_lock_init(&local->set_tim_lock);
3171
3172         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3173
3174         /* Initialize tasklets for handling hardware IRQ related operations
3175          * outside hw IRQ handler */
3176         tasklet_setup(&local->bap_tasklet, hostap_bap_tasklet);
3177         tasklet_setup(&local->info_tasklet, hostap_info_tasklet);
3178         hostap_info_init(local);
3179
3180         tasklet_setup(&local->rx_tasklet, hostap_rx_tasklet);
3181         skb_queue_head_init(&local->rx_list);
3182
3183         tasklet_setup(&local->sta_tx_exc_tasklet,
3184                             hostap_sta_tx_exc_tasklet);
3185         skb_queue_head_init(&local->sta_tx_exc_list);
3186
3187         INIT_LIST_HEAD(&local->cmd_queue);
3188         init_waitqueue_head(&local->hostscan_wq);
3189
3190         lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3191
3192         timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
3193         timer_setup(&local->tick_timer, hostap_tick_timer, 0);
3194         local->tick_timer.expires = jiffies + 2 * HZ;
3195         add_timer(&local->tick_timer);
3196
3197         INIT_LIST_HEAD(&local->bss_list);
3198
3199         hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3200
3201         dev->type = ARPHRD_IEEE80211;
3202         dev->header_ops = &hostap_80211_ops;
3203
3204         rtnl_lock();
3205         ret = dev_alloc_name(dev, "wifi%d");
3206         SET_NETDEV_DEV(dev, sdev);
3207         if (ret >= 0)
3208                 ret = register_netdevice(dev);
3209
3210         prism2_set_lockdep_class(dev);
3211         rtnl_unlock();
3212         if (ret < 0) {
3213                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3214                        dev_info);
3215                 goto fail;
3216         }
3217         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3218
3219         hostap_init_data(local);
3220         return dev;
3221
3222  fail:
3223         free_netdev(dev);
3224         return NULL;
3225 }
3226
3227
3228 static int hostap_hw_ready(struct net_device *dev)
3229 {
3230         struct hostap_interface *iface;
3231         struct local_info *local;
3232
3233         iface = netdev_priv(dev);
3234         local = iface->local;
3235         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3236                                            "", dev_template);
3237
3238         if (local->ddev) {
3239                 if (local->iw_mode == IW_MODE_INFRA ||
3240                     local->iw_mode == IW_MODE_ADHOC) {
3241                         netif_carrier_off(local->dev);
3242                         netif_carrier_off(local->ddev);
3243                 }
3244                 hostap_init_proc(local);
3245 #ifndef PRISM2_NO_PROCFS_DEBUG
3246                 proc_create_single_data("registers", 0, local->proc,
3247                                  prism2_registers_proc_show, local);
3248 #endif /* PRISM2_NO_PROCFS_DEBUG */
3249                 hostap_init_ap_proc(local);
3250                 return 0;
3251         }
3252
3253         return -1;
3254 }
3255
3256
3257 static void prism2_free_local_data(struct net_device *dev)
3258 {
3259         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3260         int i;
3261         struct hostap_interface *iface;
3262         struct local_info *local;
3263         struct list_head *ptr, *n;
3264
3265         if (dev == NULL)
3266                 return;
3267
3268         iface = netdev_priv(dev);
3269         local = iface->local;
3270
3271         /* Unregister all netdevs before freeing local data. */
3272         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3273                 iface = list_entry(ptr, struct hostap_interface, list);
3274                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3275                         /* special handling for this interface below */
3276                         continue;
3277                 }
3278                 hostap_remove_interface(iface->dev, 0, 1);
3279         }
3280
3281         unregister_netdev(local->dev);
3282
3283         flush_work(&local->reset_queue);
3284         flush_work(&local->set_multicast_list_queue);
3285         flush_work(&local->set_tim_queue);
3286 #ifndef PRISM2_NO_STATION_MODES
3287         flush_work(&local->info_queue);
3288 #endif
3289         flush_work(&local->comms_qual_update);
3290
3291         lib80211_crypt_info_free(&local->crypt_info);
3292
3293         if (timer_pending(&local->passive_scan_timer))
3294                 del_timer(&local->passive_scan_timer);
3295
3296         if (timer_pending(&local->tick_timer))
3297                 del_timer(&local->tick_timer);
3298
3299         prism2_clear_cmd_queue(local);
3300
3301         skb_queue_purge(&local->info_list);
3302         skb_queue_purge(&local->rx_list);
3303         skb_queue_purge(&local->sta_tx_exc_list);
3304
3305         if (local->dev_enabled)
3306                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3307
3308         if (local->ap != NULL)
3309                 hostap_free_data(local->ap);
3310
3311 #ifndef PRISM2_NO_PROCFS_DEBUG
3312         if (local->proc != NULL)
3313                 remove_proc_entry("registers", local->proc);
3314 #endif /* PRISM2_NO_PROCFS_DEBUG */
3315         hostap_remove_proc(local);
3316
3317         tx_cb = local->tx_callback;
3318         while (tx_cb != NULL) {
3319                 tx_cb_prev = tx_cb;
3320                 tx_cb = tx_cb->next;
3321                 kfree(tx_cb_prev);
3322         }
3323
3324         hostap_set_hostapd(local, 0, 0);
3325         hostap_set_hostapd_sta(local, 0, 0);
3326
3327         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3328                 if (local->frag_cache[i].skb != NULL)
3329                         dev_kfree_skb(local->frag_cache[i].skb);
3330         }
3331
3332 #ifdef PRISM2_DOWNLOAD_SUPPORT
3333         prism2_download_free_data(local->dl_pri);
3334         prism2_download_free_data(local->dl_sec);
3335 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3336
3337         prism2_clear_set_tim_queue(local);
3338
3339         list_for_each_safe(ptr, n, &local->bss_list) {
3340                 struct hostap_bss_info *bss =
3341                         list_entry(ptr, struct hostap_bss_info, list);
3342                 kfree(bss);
3343         }
3344
3345         kfree(local->pda);
3346         kfree(local->last_scan_results);
3347         kfree(local->generic_elem);
3348
3349         free_netdev(local->dev);
3350 }
3351
3352
3353 #if defined(PRISM2_PCI) || defined(PRISM2_PCCARD)
3354 static void __maybe_unused prism2_suspend(struct net_device *dev)
3355 {
3356         struct hostap_interface *iface;
3357         struct local_info *local;
3358         union iwreq_data wrqu;
3359
3360         iface = netdev_priv(dev);
3361         local = iface->local;
3362
3363         /* Send disconnect event, e.g., to trigger reassociation after resume
3364          * if wpa_supplicant is used. */
3365         memset(&wrqu, 0, sizeof(wrqu));
3366         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3367         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3368
3369         /* Disable hardware and firmware */
3370         prism2_hw_shutdown(dev, 0);
3371 }
3372 #endif /* PRISM2_PCI || PRISM2_PCCARD */
3373
3374
3375 /* These might at some point be compiled separately and used as separate
3376  * kernel modules or linked into one */
3377 #ifdef PRISM2_DOWNLOAD_SUPPORT
3378 #include "hostap_download.c"
3379 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3380
3381 #ifdef PRISM2_CALLBACK
3382 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3383  * This can use platform specific code and must define prism2_callback()
3384  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3385  * used. */
3386 #include "hostap_callback.c"
3387 #endif /* PRISM2_CALLBACK */