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  * <j@w1.fi>
   8  * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
   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 file_operations prism2_download_aux_dump_proc_fops;
 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 (in_interrupt()) {
 324                 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
 325                        "context\n", dev->name);
 326                 return -1;
 327         }
 328
 329         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
 330                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 331                        dev->name);
 332                 return -1;
 333         }
 334
 335         if (signal_pending(current))
 336                 return -EINTR;
 337
 338         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 339         if (entry == NULL)
 340                 return -ENOMEM;
 341
 342         refcount_set(&entry->usecnt, 1);
 343         entry->type = CMD_SLEEP;
 344         entry->cmd = cmd;
 345         entry->param0 = param0;
 346         if (param1)
 347                 entry->param1 = *param1;
 348         init_waitqueue_head(&entry->compl);
 349
 350         /* prepare to wait for command completion event, but do not sleep yet
 351          */
 352         add_wait_queue(&entry->compl, &wait);
 353         set_current_state(TASK_INTERRUPTIBLE);
 354
 355         spin_lock_irqsave(&local->cmdlock, flags);
 356         issue = list_empty(&local->cmd_queue);
 357         if (issue)
 358                 entry->issuing = 1;
 359         list_add_tail(&entry->list, &local->cmd_queue);
 360         local->cmd_queue_len++;
 361         spin_unlock_irqrestore(&local->cmdlock, flags);
 362
 363         err = 0;
 364         if (!issue)
 365                 goto wait_completion;
 366
 367         if (signal_pending(current))
 368                 err = -EINTR;
 369
 370         if (!err) {
 371                 if (hfa384x_cmd_issue(dev, entry))
 372                         err = -ETIMEDOUT;
 373                 else
 374                         issued = 1;
 375         }
 376
 377  wait_completion:
 378         if (!err && entry->type != CMD_COMPLETED) {
 379                 /* sleep until command is completed or timed out */
 380                 res = schedule_timeout(2 * HZ);
 381         } else
 382                 res = -1;
 383
 384         if (!err && signal_pending(current))
 385                 err = -EINTR;
 386
 387         if (err && issued) {
 388                 /* the command was issued, so a CmdCompl event should occur
 389                  * soon; however, there's a pending signal and
 390                  * schedule_timeout() would be interrupted; wait a short period
 391                  * of time to avoid removing entry from the list before
 392                  * CmdCompl event */
 393                 udelay(300);
 394         }
 395
 396         set_current_state(TASK_RUNNING);
 397         remove_wait_queue(&entry->compl, &wait);
 398
 399         /* If entry->list is still in the list, it must be removed
 400          * first and in this case prism2_cmd_ev() does not yet have
 401          * local reference to it, and the data can be kfree()'d
 402          * here. If the command completion event is still generated,
 403          * it will be assigned to next (possibly) pending command, but
 404          * the driver will reset the card anyway due to timeout
 405          *
 406          * If the entry is not in the list prism2_cmd_ev() has a local
 407          * reference to it, but keeps cmdlock as long as the data is
 408          * needed, so the data can be kfree()'d here. */
 409
 410         /* FIX: if the entry->list is in the list, it has not been completed
 411          * yet, so removing it here is somewhat wrong.. this could cause
 412          * references to freed memory and next list_del() causing NULL pointer
 413          * dereference.. it would probably be better to leave the entry in the
 414          * list and the list should be emptied during hw reset */
 415
 416         spin_lock_irqsave(&local->cmdlock, flags);
 417         if (!list_empty(&entry->list)) {
 418                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
 419                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
 420                        entry->type, res);
 421                 list_del_init(&entry->list);
 422                 local->cmd_queue_len--;
 423         }
 424         spin_unlock_irqrestore(&local->cmdlock, flags);
 425
 426         if (err) {
 427                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
 428                        dev->name, err);
 429                 res = err;
 430                 goto done;
 431         }
 432
 433         if (entry->type != CMD_COMPLETED) {
 434                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 435                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
 436                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
 437                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
 438                        res, entry, entry->type, entry->cmd, entry->param0, reg,
 439                        HFA384X_INW(HFA384X_INTEN_OFF));
 440                 if (reg & HFA384X_EV_CMD) {
 441                         /* Command completion event is pending, but the
 442                          * interrupt was not delivered - probably an issue
 443                          * with pcmcia-cs configuration. */
 444                         printk(KERN_WARNING "%s: interrupt delivery does not "
 445                                "seem to work\n", dev->name);
 446                 }
 447                 prism2_io_debug_error(dev, 3);
 448                 res = -ETIMEDOUT;
 449                 goto done;
 450         }
 451
 452         if (resp0 != NULL)
 453                 *resp0 = entry->resp0;
 454 #ifndef final_version
 455         if (entry->res) {
 456                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
 457                        "resp0=0x%04x\n",
 458                        dev->name, cmd, entry->res, entry->resp0);
 459         }
 460 #endif /* final_version */
 461
 462         res = entry->res;
 463  done:
 464         hostap_cmd_queue_free(local, entry, 1);
 465         return res;
 466 }
 467
 468
 469 /**
 470  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
 471  * @dev: pointer to net_device
 472  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 473  * @param0: value for Param0 register
 474  * @callback: command completion callback function (%NULL = no callback)
 475  * @context: context data to be given to the callback function
 476  *
 477  * Issue given command (possibly after waiting in command queue) and use
 478  * callback function to indicate command completion. This can be called both
 479  * from user and interrupt context. The callback function will be called in
 480  * hardware IRQ context. It can be %NULL, when no function is called when
 481  * command is completed.
 482  */
 483 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
 484                                 void (*callback)(struct net_device *dev,
 485                                                  long context, u16 resp0,
 486                                                  u16 status),
 487                                 long context)
 488 {
 489         struct hostap_interface *iface;
 490         local_info_t *local;
 491         int issue, ret;
 492         unsigned long flags;
 493         struct hostap_cmd_queue *entry;
 494
 495         iface = netdev_priv(dev);
 496         local = iface->local;
 497
 498         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
 499                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
 500                        dev->name);
 501                 return -1;
 502         }
 503
 504         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 505         if (entry == NULL)
 506                 return -ENOMEM;
 507
 508         refcount_set(&entry->usecnt, 1);
 509         entry->type = CMD_CALLBACK;
 510         entry->cmd = cmd;
 511         entry->param0 = param0;
 512         entry->callback = callback;
 513         entry->context = context;
 514
 515         spin_lock_irqsave(&local->cmdlock, flags);
 516         issue = list_empty(&local->cmd_queue);
 517         if (issue)
 518                 entry->issuing = 1;
 519         list_add_tail(&entry->list, &local->cmd_queue);
 520         local->cmd_queue_len++;
 521         spin_unlock_irqrestore(&local->cmdlock, flags);
 522
 523         if (issue && hfa384x_cmd_issue(dev, entry))
 524                 ret = -ETIMEDOUT;
 525         else
 526                 ret = 0;
 527
 528         hostap_cmd_queue_free(local, entry, ret);
 529
 530         return ret;
 531 }
 532
 533
 534 /**
 535  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
 536  * @dev: pointer to net_device
 537  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 538  * @param0: value for Param0 register
 539  * @io_debug_num: I/O debug error number
 540  *
 541  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
 542  */
 543 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
 544                                  int io_debug_num)
 545 {
 546         int tries;
 547         u16 reg;
 548
 549         /* wait until busy bit is clear; this should always be clear since the
 550          * commands are serialized */
 551         tries = HFA384X_CMD_BUSY_TIMEOUT;
 552         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 553                 tries--;
 554                 udelay(1);
 555         }
 556         if (tries == 0) {
 557                 reg = HFA384X_INW(HFA384X_CMD_OFF);
 558                 prism2_io_debug_error(dev, io_debug_num);
 559                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
 560                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
 561                 return -ETIMEDOUT;
 562         }
 563
 564         /* write command */
 565         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
 566         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
 567
 568         return 0;
 569 }
 570
 571
 572 /**
 573  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
 574  * @dev: pointer to net_device
 575  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 576  * @param0: value for Param0 register
 577  */
 578 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
 579 {
 580         int res, tries;
 581         u16 reg;
 582
 583         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
 584         if (res)
 585                 return res;
 586
 587         /* wait for command completion */
 588         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
 589                 tries = HFA384X_DL_COMPL_TIMEOUT;
 590         else
 591                 tries = HFA384X_CMD_COMPL_TIMEOUT;
 592
 593         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
 594                tries > 0) {
 595                 tries--;
 596                 udelay(10);
 597         }
 598         if (tries == 0) {
 599                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
 600                 prism2_io_debug_error(dev, 5);
 601                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
 602                        "reg=0x%04x\n", dev->name, reg);
 603                 return -ETIMEDOUT;
 604         }
 605
 606         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 607                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
 608                 BIT(8))) >> 8;
 609 #ifndef final_version
 610         if (res) {
 611                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
 612                        dev->name, cmd, res);
 613         }
 614 #endif
 615
 616         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 617
 618         return res;
 619 }
 620
 621
 622 /**
 623  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
 624  * @dev: pointer to net_device
 625  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
 626  * @param0: value for Param0 register
 627  */
 628 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
 629                                       u16 param0)
 630 {
 631         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
 632 }
 633
 634
 635 /**
 636  * prism2_cmd_ev - Prism2 command completion event handler
 637  * @dev: pointer to net_device
 638  *
 639  * Interrupt handler for command completion events. Called by the main
 640  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
 641  * from the hardware and ACK the event. Depending on the issued command type
 642  * either wake up the sleeping process that is waiting for command completion
 643  * or call the callback function. Issue the next command, if one is pending.
 644  */
 645 static void prism2_cmd_ev(struct net_device *dev)
 646 {
 647         struct hostap_interface *iface;
 648         local_info_t *local;
 649         struct hostap_cmd_queue *entry = NULL;
 650
 651         iface = netdev_priv(dev);
 652         local = iface->local;
 653
 654         spin_lock(&local->cmdlock);
 655         if (!list_empty(&local->cmd_queue)) {
 656                 entry = list_entry(local->cmd_queue.next,
 657                                    struct hostap_cmd_queue, list);
 658                 refcount_inc(&entry->usecnt);
 659                 list_del_init(&entry->list);
 660                 local->cmd_queue_len--;
 661
 662                 if (!entry->issued) {
 663                         printk(KERN_DEBUG "%s: Command completion event, but "
 664                                "cmd not issued\n", dev->name);
 665                         __hostap_cmd_queue_free(local, entry, 1);
 666                         entry = NULL;
 667                 }
 668         }
 669         spin_unlock(&local->cmdlock);
 670
 671         if (!entry) {
 672                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 673                 printk(KERN_DEBUG "%s: Command completion event, but no "
 674                        "pending commands\n", dev->name);
 675                 return;
 676         }
 677
 678         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
 679         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
 680                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
 681                        BIT(9) | BIT(8))) >> 8;
 682         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
 683
 684         /* TODO: rest of the CmdEv handling could be moved to tasklet */
 685         if (entry->type == CMD_SLEEP) {
 686                 entry->type = CMD_COMPLETED;
 687                 wake_up_interruptible(&entry->compl);
 688         } else if (entry->type == CMD_CALLBACK) {
 689                 if (entry->callback)
 690                         entry->callback(dev, entry->context, entry->resp0,
 691                                         entry->res);
 692         } else {
 693                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
 694                        dev->name, entry->type);
 695         }
 696         hostap_cmd_queue_free(local, entry, 1);
 697
 698         /* issue next command, if pending */
 699         entry = NULL;
 700         spin_lock(&local->cmdlock);
 701         if (!list_empty(&local->cmd_queue)) {
 702                 entry = list_entry(local->cmd_queue.next,
 703                                    struct hostap_cmd_queue, list);
 704                 if (entry->issuing) {
 705                         /* hfa384x_cmd() has already started issuing this
 706                          * command, so do not start here */
 707                         entry = NULL;
 708                 }
 709                 if (entry)
 710                         refcount_inc(&entry->usecnt);
 711         }
 712         spin_unlock(&local->cmdlock);
 713
 714         if (entry) {
 715                 /* issue next command; if command issuing fails, remove the
 716                  * entry from cmd_queue */
 717                 int res = hfa384x_cmd_issue(dev, entry);
 718                 spin_lock(&local->cmdlock);
 719                 __hostap_cmd_queue_free(local, entry, res);
 720                 spin_unlock(&local->cmdlock);
 721         }
 722 }
 723
 724
 725 static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
 726 {
 727         int tries = HFA384X_BAP_BUSY_TIMEOUT;
 728         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 729
 730         while (res && tries > 0) {
 731                 tries--;
 732                 udelay(1);
 733                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
 734         }
 735         return res;
 736 }
 737
 738
 739 /* Offset must be even */
 740 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
 741                              int offset)
 742 {
 743         u16 o_off, s_off;
 744         int ret = 0;
 745
 746         if (offset % 2 || bap > 1)
 747                 return -EINVAL;
 748
 749         if (bap == BAP1) {
 750                 o_off = HFA384X_OFFSET1_OFF;
 751                 s_off = HFA384X_SELECT1_OFF;
 752         } else {
 753                 o_off = HFA384X_OFFSET0_OFF;
 754                 s_off = HFA384X_SELECT0_OFF;
 755         }
 756
 757         if (hfa384x_wait_offset(dev, o_off)) {
 758                 prism2_io_debug_error(dev, 7);
 759                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
 760                        dev->name);
 761                 ret = -ETIMEDOUT;
 762                 goto out;
 763         }
 764
 765         HFA384X_OUTW(id, s_off);
 766         HFA384X_OUTW(offset, o_off);
 767
 768         if (hfa384x_wait_offset(dev, o_off)) {
 769                 prism2_io_debug_error(dev, 8);
 770                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
 771                        dev->name);
 772                 ret = -ETIMEDOUT;
 773                 goto out;
 774         }
 775 #ifndef final_version
 776         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
 777                 prism2_io_debug_error(dev, 9);
 778                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
 779                        "(%d,0x04%x,%d); reg=0x%04x\n",
 780                        dev->name, bap, id, offset, HFA384X_INW(o_off));
 781                 ret = -EINVAL;
 782         }
 783 #endif
 784
 785  out:
 786         return ret;
 787 }
 788
 789
 790 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
 791                            int exact_len)
 792 {
 793         struct hostap_interface *iface;
 794         local_info_t *local;
 795         int res, rlen = 0;
 796         struct hfa384x_rid_hdr rec;
 797
 798         iface = netdev_priv(dev);
 799         local = iface->local;
 800
 801         if (local->no_pri) {
 802                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
 803                        "f/w\n", dev->name, rid, len);
 804                 return -ENOTTY; /* Well.. not really correct, but return
 805                                  * something unique enough.. */
 806         }
 807
 808         if ((local->func->card_present && !local->func->card_present(local)) ||
 809             local->hw_downloading)
 810                 return -ENODEV;
 811
 812         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 813         if (res)
 814                 return res;
 815
 816         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
 817         if (res) {
 818                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
 819                        "(res=%d, rid=%04x, len=%d)\n",
 820                        dev->name, res, rid, len);
 821                 mutex_unlock(&local->rid_bap_mtx);
 822                 return res;
 823         }
 824
 825         spin_lock_bh(&local->baplock);
 826
 827         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 828         if (res)
 829                 goto unlock;
 830
 831         res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
 832         if (res)
 833                 goto unlock;
 834
 835         if (le16_to_cpu(rec.len) == 0) {
 836                 /* RID not available */
 837                 res = -ENODATA;
 838                 goto unlock;
 839         }
 840
 841         rlen = (le16_to_cpu(rec.len) - 1) * 2;
 842         if (exact_len && rlen != len) {
 843                 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
 844                        "rid=0x%04x, len=%d (expected %d)\n",
 845                        dev->name, rid, rlen, len);
 846                 res = -ENODATA;
 847         }
 848
 849         res = hfa384x_from_bap(dev, BAP0, buf, len);
 850
 851 unlock:
 852         spin_unlock_bh(&local->baplock);
 853         mutex_unlock(&local->rid_bap_mtx);
 854
 855         if (res) {
 856                 if (res != -ENODATA)
 857                         printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
 858                                "len=%d) - failed - res=%d\n", dev->name, rid,
 859                                len, res);
 860                 if (res == -ETIMEDOUT)
 861                         prism2_hw_reset(dev);
 862                 return res;
 863         }
 864
 865         return rlen;
 866 }
 867
 868
 869 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
 870 {
 871         struct hostap_interface *iface;
 872         local_info_t *local;
 873         struct hfa384x_rid_hdr rec;
 874         int res;
 875
 876         iface = netdev_priv(dev);
 877         local = iface->local;
 878
 879         if (local->no_pri) {
 880                 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
 881                        "f/w\n", dev->name, rid, len);
 882                 return -ENOTTY; /* Well.. not really correct, but return
 883                                  * something unique enough.. */
 884         }
 885
 886         if ((local->func->card_present && !local->func->card_present(local)) ||
 887             local->hw_downloading)
 888                 return -ENODEV;
 889
 890         rec.rid = cpu_to_le16(rid);
 891         /* RID len in words and +1 for rec.rid */
 892         rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
 893
 894         res = mutex_lock_interruptible(&local->rid_bap_mtx);
 895         if (res)
 896                 return res;
 897
 898         spin_lock_bh(&local->baplock);
 899         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
 900         if (!res)
 901                 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
 902         if (!res)
 903                 res = hfa384x_to_bap(dev, BAP0, buf, len);
 904         spin_unlock_bh(&local->baplock);
 905
 906         if (res) {
 907                 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
 908                        "failed - res=%d\n", dev->name, rid, len, res);
 909                 mutex_unlock(&local->rid_bap_mtx);
 910                 return res;
 911         }
 912
 913         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
 914         mutex_unlock(&local->rid_bap_mtx);
 915
 916         if (res) {
 917                 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
 918                        "failed (res=%d, rid=%04x, len=%d)\n",
 919                        dev->name, res, rid, len);
 920
 921                 if (res == -ETIMEDOUT)
 922                         prism2_hw_reset(dev);
 923         }
 924
 925         return res;
 926 }
 927
 928
 929 static void hfa384x_disable_interrupts(struct net_device *dev)
 930 {
 931         /* disable interrupts and clear event status */
 932         HFA384X_OUTW(0, HFA384X_INTEN_OFF);
 933         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 934 }
 935
 936
 937 static void hfa384x_enable_interrupts(struct net_device *dev)
 938 {
 939         /* ack pending events and enable interrupts from selected events */
 940         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
 941         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 942 }
 943
 944
 945 static void hfa384x_events_no_bap0(struct net_device *dev)
 946 {
 947         HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
 948                      HFA384X_INTEN_OFF);
 949 }
 950
 951
 952 static void hfa384x_events_all(struct net_device *dev)
 953 {
 954         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
 955 }
 956
 957
 958 static void hfa384x_events_only_cmd(struct net_device *dev)
 959 {
 960         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
 961 }
 962
 963
 964 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
 965 {
 966         u16 fid;
 967         unsigned long delay;
 968
 969         /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
 970          * below would be handled like CmdCompl event (sleep here, wake up from
 971          * interrupt handler */
 972         if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
 973                 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
 974                        dev->name, len);
 975                 return 0xffff;
 976         }
 977
 978         delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
 979         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
 980                time_before(jiffies, delay))
 981                 yield();
 982         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
 983                 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
 984                 return 0xffff;
 985         }
 986
 987         fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
 988         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
 989
 990         return fid;
 991 }
 992
 993
 994 static int prism2_reset_port(struct net_device *dev)
 995 {
 996         struct hostap_interface *iface;
 997         local_info_t *local;
 998         int res;
 999
1000         iface = netdev_priv(dev);
1001         local = iface->local;
1002
1003         if (!local->dev_enabled)
1004                 return 0;
1005
1006         res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1007                           NULL, NULL);
1008         if (res)
1009                 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1010                        dev->name);
1011         else {
1012                 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1013                                   NULL, NULL);
1014                 if (res)
1015                         printk(KERN_DEBUG "%s: reset port failed to enable "
1016                                "port\n", dev->name);
1017         }
1018
1019         /* It looks like at least some STA firmware versions reset
1020          * fragmentation threshold back to 2346 after enable command. Restore
1021          * the configured value, if it differs from this default. */
1022         if (local->fragm_threshold != 2346 &&
1023             hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1024                             local->fragm_threshold)) {
1025                 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1026                        "threshold (%d) after Port0 enable\n",
1027                        dev->name, local->fragm_threshold);
1028         }
1029
1030         /* Some firmwares lose antenna selection settings on reset */
1031         (void) hostap_set_antsel(local);
1032
1033         return res;
1034 }
1035
1036
1037 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1038                                    const char *txt)
1039 {
1040         struct hfa384x_comp_ident comp;
1041         struct hostap_interface *iface;
1042         local_info_t *local;
1043
1044         iface = netdev_priv(dev);
1045         local = iface->local;
1046
1047         if (local->no_pri) {
1048                 /* PRI f/w not yet available - cannot read RIDs */
1049                 return -1;
1050         }
1051         if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1052                 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1053                 return -1;
1054         }
1055
1056         printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1057                __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1058                __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1059         return 0;
1060 }
1061
1062
1063 static int prism2_setup_rids(struct net_device *dev)
1064 {
1065         struct hostap_interface *iface;
1066         local_info_t *local;
1067         __le16 tmp;
1068         int ret = 0;
1069
1070         iface = netdev_priv(dev);
1071         local = iface->local;
1072
1073         hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1074
1075         if (!local->fw_ap) {
1076                 u16 tmp1 = hostap_get_porttype(local);
1077                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
1078                 if (ret) {
1079                         printk("%s: Port type setting to %d failed\n",
1080                                dev->name, tmp1);
1081                         goto fail;
1082                 }
1083         }
1084
1085         /* Setting SSID to empty string seems to kill the card in Host AP mode
1086          */
1087         if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1088                 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1089                                         local->essid);
1090                 if (ret) {
1091                         printk("%s: AP own SSID setting failed\n", dev->name);
1092                         goto fail;
1093                 }
1094         }
1095
1096         ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1097                               PRISM2_DATA_MAXLEN);
1098         if (ret) {
1099                 printk("%s: MAC data length setting to %d failed\n",
1100                        dev->name, PRISM2_DATA_MAXLEN);
1101                 goto fail;
1102         }
1103
1104         if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1105                 printk("%s: Channel list read failed\n", dev->name);
1106                 ret = -EINVAL;
1107                 goto fail;
1108         }
1109         local->channel_mask = le16_to_cpu(tmp);
1110
1111         if (local->channel < 1 || local->channel > 14 ||
1112             !(local->channel_mask & (1 << (local->channel - 1)))) {
1113                 printk(KERN_WARNING "%s: Channel setting out of range "
1114                        "(%d)!\n", dev->name, local->channel);
1115                 ret = -EBUSY;
1116                 goto fail;
1117         }
1118
1119         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1120         if (ret) {
1121                 printk("%s: Channel setting to %d failed\n",
1122                        dev->name, local->channel);
1123                 goto fail;
1124         }
1125
1126         ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1127                               local->beacon_int);
1128         if (ret) {
1129                 printk("%s: Beacon interval setting to %d failed\n",
1130                        dev->name, local->beacon_int);
1131                 /* this may fail with Symbol/Lucent firmware */
1132                 if (ret == -ETIMEDOUT)
1133                         goto fail;
1134         }
1135
1136         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1137                               local->dtim_period);
1138         if (ret) {
1139                 printk("%s: DTIM period setting to %d failed\n",
1140                        dev->name, local->dtim_period);
1141                 /* this may fail with Symbol/Lucent firmware */
1142                 if (ret == -ETIMEDOUT)
1143                         goto fail;
1144         }
1145
1146         ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1147                               local->is_promisc);
1148         if (ret)
1149                 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1150                        dev->name, local->is_promisc);
1151
1152         if (!local->fw_ap) {
1153                 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1154                                         local->essid);
1155                 if (ret) {
1156                         printk("%s: Desired SSID setting failed\n", dev->name);
1157                         goto fail;
1158                 }
1159         }
1160
1161         /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1162          * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1163          * rates */
1164         if (local->tx_rate_control == 0) {
1165                 local->tx_rate_control =
1166                         HFA384X_RATES_1MBPS |
1167                         HFA384X_RATES_2MBPS |
1168                         HFA384X_RATES_5MBPS |
1169                         HFA384X_RATES_11MBPS;
1170         }
1171         if (local->basic_rates == 0)
1172                 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1173
1174         if (!local->fw_ap) {
1175                 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1176                                       local->tx_rate_control);
1177                 if (ret) {
1178                         printk("%s: TXRateControl setting to %d failed\n",
1179                                dev->name, local->tx_rate_control);
1180                         goto fail;
1181                 }
1182
1183                 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1184                                       local->tx_rate_control);
1185                 if (ret) {
1186                         printk("%s: cnfSupportedRates setting to %d failed\n",
1187                                dev->name, local->tx_rate_control);
1188                 }
1189
1190                 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1191                                       local->basic_rates);
1192                 if (ret) {
1193                         printk("%s: cnfBasicRates setting to %d failed\n",
1194                                dev->name, local->basic_rates);
1195                 }
1196
1197                 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1198                 if (ret) {
1199                         printk("%s: Create IBSS setting to 1 failed\n",
1200                                dev->name);
1201                 }
1202         }
1203
1204         if (local->name_set)
1205                 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1206                                          local->name);
1207
1208         if (hostap_set_encryption(local)) {
1209                 printk(KERN_INFO "%s: could not configure encryption\n",
1210                        dev->name);
1211         }
1212
1213         (void) hostap_set_antsel(local);
1214
1215         if (hostap_set_roaming(local)) {
1216                 printk(KERN_INFO "%s: could not set host roaming\n",
1217                        dev->name);
1218         }
1219
1220         if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1221             hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1222                 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1223                        dev->name, local->enh_sec);
1224
1225         /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1226          * not working correctly (last seven counters report bogus values).
1227          * This has been fixed in 0.8.2, so enable 32-bit tallies only
1228          * beginning with that firmware version. Another bug fix for 32-bit
1229          * tallies in 1.4.0; should 16-bit tallies be used for some other
1230          * versions, too? */
1231         if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1232                 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1233                         printk(KERN_INFO "%s: cnfThirty2Tally setting "
1234                                "failed\n", dev->name);
1235                         local->tallies32 = 0;
1236                 } else
1237                         local->tallies32 = 1;
1238         } else
1239                 local->tallies32 = 0;
1240
1241         hostap_set_auth_algs(local);
1242
1243         if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1244                             local->fragm_threshold)) {
1245                 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1246                        "failed\n", dev->name, local->fragm_threshold);
1247         }
1248
1249         if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1250                             local->rts_threshold)) {
1251                 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1252                        dev->name, local->rts_threshold);
1253         }
1254
1255         if (local->manual_retry_count >= 0 &&
1256             hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1257                             local->manual_retry_count)) {
1258                 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1259                        dev->name, local->manual_retry_count);
1260         }
1261
1262         if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1263             hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1264                 local->rssi_to_dBm = le16_to_cpu(tmp);
1265         }
1266
1267         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1268             hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1269                 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1270                        dev->name);
1271         }
1272
1273         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1274             hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1275                             local->generic_elem, local->generic_elem_len)) {
1276                 printk(KERN_INFO "%s: setting genericElement failed\n",
1277                        dev->name);
1278         }
1279
1280  fail:
1281         return ret;
1282 }
1283
1284
1285 static int prism2_hw_init(struct net_device *dev, int initial)
1286 {
1287         struct hostap_interface *iface;
1288         local_info_t *local;
1289         int ret, first = 1;
1290         unsigned long start, delay;
1291
1292         PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1293
1294         iface = netdev_priv(dev);
1295         local = iface->local;
1296
1297         clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1298
1299  init:
1300         /* initialize HFA 384x */
1301         ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1302         if (ret) {
1303                 printk(KERN_INFO "%s: first command failed - assuming card "
1304                        "does not have primary firmware\n", dev_info);
1305         }
1306
1307         if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1308                 /* EvStat has Cmd bit set in some cases, so retry once if no
1309                  * wait was needed */
1310                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1311                 printk(KERN_DEBUG "%s: init command completed too quickly - "
1312                        "retrying\n", dev->name);
1313                 first = 0;
1314                 goto init;
1315         }
1316
1317         start = jiffies;
1318         delay = jiffies + HFA384X_INIT_TIMEOUT;
1319         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1320                time_before(jiffies, delay))
1321                 yield();
1322         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1323                 printk(KERN_DEBUG "%s: assuming no Primary image in "
1324                        "flash - card initialization not completed\n",
1325                        dev_info);
1326                 local->no_pri = 1;
1327 #ifdef PRISM2_DOWNLOAD_SUPPORT
1328                         if (local->sram_type == -1)
1329                                 local->sram_type = prism2_get_ram_size(local);
1330 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1331                 return 1;
1332         }
1333         local->no_pri = 0;
1334         printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1335                (jiffies - start) * 1000 / HZ);
1336         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1337         return 0;
1338 }
1339
1340
1341 static int prism2_hw_init2(struct net_device *dev, int initial)
1342 {
1343         struct hostap_interface *iface;
1344         local_info_t *local;
1345         int i;
1346
1347         iface = netdev_priv(dev);
1348         local = iface->local;
1349
1350 #ifdef PRISM2_DOWNLOAD_SUPPORT
1351         kfree(local->pda);
1352         if (local->no_pri)
1353                 local->pda = NULL;
1354         else
1355                 local->pda = prism2_read_pda(dev);
1356 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1357
1358         hfa384x_disable_interrupts(dev);
1359
1360 #ifndef final_version
1361         HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1362         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1363                 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1364                        HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1365                 goto failed;
1366         }
1367 #endif
1368
1369         if (initial || local->pri_only) {
1370                 hfa384x_events_only_cmd(dev);
1371                 /* get card version information */
1372                 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1373                     prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1374                         hfa384x_disable_interrupts(dev);
1375                         goto failed;
1376                 }
1377
1378                 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1379                         printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1380                                "- only Primary f/w present\n", dev->name);
1381                         local->pri_only = 1;
1382                         return 0;
1383                 }
1384                 local->pri_only = 0;
1385                 hfa384x_disable_interrupts(dev);
1386         }
1387
1388         /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1389          * enable interrupts before this. This would also require some sort of
1390          * sleeping AllocEv waiting */
1391
1392         /* allocate TX FIDs */
1393         local->txfid_len = PRISM2_TXFID_LEN;
1394         for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1395                 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1396                 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1397                         local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1398                         if (local->txfid[i] != 0xffff) {
1399                                 printk(KERN_DEBUG "%s: Using shorter TX FID "
1400                                        "(1600 bytes)\n", dev->name);
1401                                 local->txfid_len = 1600;
1402                         }
1403                 }
1404                 if (local->txfid[i] == 0xffff)
1405                         goto failed;
1406                 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1407         }
1408
1409         hfa384x_events_only_cmd(dev);
1410
1411         if (initial) {
1412                 struct list_head *ptr;
1413                 prism2_check_sta_fw_version(local);
1414
1415                 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1416                                     dev->dev_addr, 6, 1) < 0) {
1417                         printk("%s: could not get own MAC address\n",
1418                                dev->name);
1419                 }
1420                 list_for_each(ptr, &local->hostap_interfaces) {
1421                         iface = list_entry(ptr, struct hostap_interface, list);
1422                         eth_hw_addr_inherit(iface->dev, dev);
1423                 }
1424         } else if (local->fw_ap)
1425                 prism2_check_sta_fw_version(local);
1426
1427         prism2_setup_rids(dev);
1428
1429         /* MAC is now configured, but port 0 is not yet enabled */
1430         return 0;
1431
1432  failed:
1433         if (!local->no_pri)
1434                 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1435         return 1;
1436 }
1437
1438
1439 static int prism2_hw_enable(struct net_device *dev, int initial)
1440 {
1441         struct hostap_interface *iface;
1442         local_info_t *local;
1443         int was_resetting;
1444
1445         iface = netdev_priv(dev);
1446         local = iface->local;
1447         was_resetting = local->hw_resetting;
1448
1449         if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1450                 printk("%s: MAC port 0 enabling failed\n", dev->name);
1451                 return 1;
1452         }
1453
1454         local->hw_ready = 1;
1455         local->hw_reset_tries = 0;
1456         local->hw_resetting = 0;
1457         hfa384x_enable_interrupts(dev);
1458
1459         /* at least D-Link DWL-650 seems to require additional port reset
1460          * before it starts acting as an AP, so reset port automatically
1461          * here just in case */
1462         if (initial && prism2_reset_port(dev)) {
1463                 printk("%s: MAC port 0 resetting failed\n", dev->name);
1464                 return 1;
1465         }
1466
1467         if (was_resetting && netif_queue_stopped(dev)) {
1468                 /* If hw_reset() was called during pending transmit, netif
1469                  * queue was stopped. Wake it up now since the wlan card has
1470                  * been resetted. */
1471                 netif_wake_queue(dev);
1472         }
1473
1474         return 0;
1475 }
1476
1477
1478 static int prism2_hw_config(struct net_device *dev, int initial)
1479 {
1480         struct hostap_interface *iface;
1481         local_info_t *local;
1482
1483         iface = netdev_priv(dev);
1484         local = iface->local;
1485
1486         if (local->hw_downloading)
1487                 return 1;
1488
1489         if (prism2_hw_init(dev, initial)) {
1490                 return local->no_pri ? 0 : 1;
1491         }
1492
1493         if (prism2_hw_init2(dev, initial))
1494                 return 1;
1495
1496         /* Enable firmware if secondary image is loaded and at least one of the
1497          * netdevices is up. */
1498         if (!local->pri_only &&
1499             (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1500                 if (!local->dev_enabled)
1501                         prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1502                 local->dev_enabled = 1;
1503                 return prism2_hw_enable(dev, initial);
1504         }
1505
1506         return 0;
1507 }
1508
1509
1510 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1511 {
1512         struct hostap_interface *iface;
1513         local_info_t *local;
1514
1515         iface = netdev_priv(dev);
1516         local = iface->local;
1517
1518         /* Allow only command completion events during disable */
1519         hfa384x_events_only_cmd(dev);
1520
1521         local->hw_ready = 0;
1522         if (local->dev_enabled)
1523                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1524         local->dev_enabled = 0;
1525
1526         if (local->func->card_present && !local->func->card_present(local)) {
1527                 printk(KERN_DEBUG "%s: card already removed or not configured "
1528                        "during shutdown\n", dev->name);
1529                 return;
1530         }
1531
1532         if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1533             hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1534                 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1535
1536         hfa384x_disable_interrupts(dev);
1537
1538         if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1539                 hfa384x_events_only_cmd(dev);
1540         else
1541                 prism2_clear_cmd_queue(local);
1542 }
1543
1544
1545 static void prism2_hw_reset(struct net_device *dev)
1546 {
1547         struct hostap_interface *iface;
1548         local_info_t *local;
1549
1550 #if 0
1551         static long last_reset = 0;
1552
1553         /* do not reset card more than once per second to avoid ending up in a
1554          * busy loop resetting the card */
1555         if (time_before_eq(jiffies, last_reset + HZ))
1556                 return;
1557         last_reset = jiffies;
1558 #endif
1559
1560         iface = netdev_priv(dev);
1561         local = iface->local;
1562
1563         if (in_interrupt()) {
1564                 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1565                        "in interrupt context\n", dev->name);
1566                 return;
1567         }
1568
1569         if (local->hw_downloading)
1570                 return;
1571
1572         if (local->hw_resetting) {
1573                 printk(KERN_WARNING "%s: %s: already resetting card - "
1574                        "ignoring reset request\n", dev_info, dev->name);
1575                 return;
1576         }
1577
1578         local->hw_reset_tries++;
1579         if (local->hw_reset_tries > 10) {
1580                 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1581                        dev->name);
1582                 return;
1583         }
1584
1585         printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1586         hfa384x_disable_interrupts(dev);
1587         local->hw_resetting = 1;
1588         if (local->func->cor_sreset) {
1589                 /* Host system seems to hang in some cases with high traffic
1590                  * load or shared interrupts during COR sreset. Disable shared
1591                  * interrupts during reset to avoid these crashes. COS sreset
1592                  * takes quite a long time, so it is unfortunate that this
1593                  * seems to be needed. Anyway, I do not know of any better way
1594                  * of avoiding the crash. */
1595                 disable_irq(dev->irq);
1596                 local->func->cor_sreset(local);
1597                 enable_irq(dev->irq);
1598         }
1599         prism2_hw_shutdown(dev, 1);
1600         prism2_hw_config(dev, 0);
1601         local->hw_resetting = 0;
1602
1603 #ifdef PRISM2_DOWNLOAD_SUPPORT
1604         if (local->dl_pri) {
1605                 printk(KERN_DEBUG "%s: persistent download of primary "
1606                        "firmware\n", dev->name);
1607                 if (prism2_download_genesis(local, local->dl_pri) < 0)
1608                         printk(KERN_WARNING "%s: download (PRI) failed\n",
1609                                dev->name);
1610         }
1611
1612         if (local->dl_sec) {
1613                 printk(KERN_DEBUG "%s: persistent download of secondary "
1614                        "firmware\n", dev->name);
1615                 if (prism2_download_volatile(local, local->dl_sec) < 0)
1616                         printk(KERN_WARNING "%s: download (SEC) failed\n",
1617                                dev->name);
1618         }
1619 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1620
1621         /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1622 }
1623
1624
1625 static void prism2_schedule_reset(local_info_t *local)
1626 {
1627         schedule_work(&local->reset_queue);
1628 }
1629
1630
1631 /* Called only as scheduled task after noticing card timeout in interrupt
1632  * context */
1633 static void handle_reset_queue(struct work_struct *work)
1634 {
1635         local_info_t *local = container_of(work, local_info_t, reset_queue);
1636
1637         printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1638         prism2_hw_reset(local->dev);
1639
1640         if (netif_queue_stopped(local->dev)) {
1641                 int i;
1642
1643                 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1644                         if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1645                                 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1646                                        "wake up queue\n");
1647                                 netif_wake_queue(local->dev);
1648                                 break;
1649                         }
1650         }
1651 }
1652
1653
1654 static int prism2_get_txfid_idx(local_info_t *local)
1655 {
1656         int idx, end;
1657         unsigned long flags;
1658
1659         spin_lock_irqsave(&local->txfidlock, flags);
1660         end = idx = local->next_txfid;
1661         do {
1662                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1663                         local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1664                         spin_unlock_irqrestore(&local->txfidlock, flags);
1665                         return idx;
1666                 }
1667                 idx++;
1668                 if (idx >= PRISM2_TXFID_COUNT)
1669                         idx = 0;
1670         } while (idx != end);
1671         spin_unlock_irqrestore(&local->txfidlock, flags);
1672
1673         PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1674                "packet dropped\n");
1675         local->dev->stats.tx_dropped++;
1676
1677         return -1;
1678 }
1679
1680
1681 /* Called only from hardware IRQ */
1682 static void prism2_transmit_cb(struct net_device *dev, long context,
1683                                u16 resp0, u16 res)
1684 {
1685         struct hostap_interface *iface;
1686         local_info_t *local;
1687         int idx = (int) context;
1688
1689         iface = netdev_priv(dev);
1690         local = iface->local;
1691
1692         if (res) {
1693                 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1694                        dev->name, res);
1695                 return;
1696         }
1697
1698         if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1699                 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1700                        "idx=%d\n", dev->name, idx);
1701                 return;
1702         }
1703
1704         if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1705                 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1706                        "with no pending transmit\n", dev->name);
1707         }
1708
1709         if (netif_queue_stopped(dev)) {
1710                 /* ready for next TX, so wake up queue that was stopped in
1711                  * prism2_transmit() */
1712                 netif_wake_queue(dev);
1713         }
1714
1715         spin_lock(&local->txfidlock);
1716
1717         /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1718          * will be automatically allocated for the next TX frame */
1719         local->intransmitfid[idx] = resp0;
1720
1721         PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1722                "resp0=0x%04x, transmit_txfid=0x%04x\n",
1723                dev->name, idx, local->txfid[idx],
1724                resp0, local->intransmitfid[local->next_txfid]);
1725
1726         idx++;
1727         if (idx >= PRISM2_TXFID_COUNT)
1728                 idx = 0;
1729         local->next_txfid = idx;
1730
1731         /* check if all TX buffers are occupied */
1732         do {
1733                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1734                         spin_unlock(&local->txfidlock);
1735                         return;
1736                 }
1737                 idx++;
1738                 if (idx >= PRISM2_TXFID_COUNT)
1739                         idx = 0;
1740         } while (idx != local->next_txfid);
1741         spin_unlock(&local->txfidlock);
1742
1743         /* no empty TX buffers, stop queue */
1744         netif_stop_queue(dev);
1745 }
1746
1747
1748 /* Called only from software IRQ if PCI bus master is not used (with bus master
1749  * this can be called both from software and hardware IRQ) */
1750 static int prism2_transmit(struct net_device *dev, int idx)
1751 {
1752         struct hostap_interface *iface;
1753         local_info_t *local;
1754         int res;
1755
1756         iface = netdev_priv(dev);
1757         local = iface->local;
1758
1759         /* The driver tries to stop netif queue so that there would not be
1760          * more than one attempt to transmit frames going on; check that this
1761          * is really the case */
1762
1763         if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1764                 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1765                        "when previous TX was pending\n", dev->name);
1766                 return -1;
1767         }
1768
1769         /* stop the queue for the time that transmit is pending */
1770         netif_stop_queue(dev);
1771
1772         /* transmit packet */
1773         res = hfa384x_cmd_callback(
1774                 dev,
1775                 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1776                 local->txfid[idx],
1777                 prism2_transmit_cb, (long) idx);
1778
1779         if (res) {
1780                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1781                        "failed (res=%d)\n", dev->name, res);
1782                 dev->stats.tx_dropped++;
1783                 netif_wake_queue(dev);
1784                 return -1;
1785         }
1786         netif_trans_update(dev);
1787
1788         /* Since we did not wait for command completion, the card continues
1789          * to process on the background and we will finish handling when
1790          * command completion event is handled (prism2_cmd_ev() function) */
1791
1792         return 0;
1793 }
1794
1795
1796 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1797  * send the payload with this descriptor) */
1798 /* Called only from software IRQ */
1799 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1800 {
1801         struct hostap_interface *iface;
1802         local_info_t *local;
1803         struct hfa384x_tx_frame txdesc;
1804         struct hostap_skb_tx_data *meta;
1805         int hdr_len, data_len, idx, res, ret = -1;
1806         u16 tx_control, fc;
1807
1808         iface = netdev_priv(dev);
1809         local = iface->local;
1810
1811         meta = (struct hostap_skb_tx_data *) skb->cb;
1812
1813         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1814
1815         if ((local->func->card_present && !local->func->card_present(local)) ||
1816             !local->hw_ready || local->hw_downloading || local->pri_only) {
1817                 if (net_ratelimit()) {
1818                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1819                                " skipping\n", dev->name);
1820                 }
1821                 goto fail;
1822         }
1823
1824         memset(&txdesc, 0, sizeof(txdesc));
1825
1826         /* skb->data starts with txdesc->frame_control */
1827         hdr_len = 24;
1828         skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
1829         fc = le16_to_cpu(txdesc.frame_control);
1830         if (ieee80211_is_data(txdesc.frame_control) &&
1831             ieee80211_has_a4(txdesc.frame_control) &&
1832             skb->len >= 30) {
1833                 /* Addr4 */
1834                 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
1835                                                  ETH_ALEN);
1836                 hdr_len += ETH_ALEN;
1837         }
1838
1839         tx_control = local->tx_control;
1840         if (meta->tx_cb_idx) {
1841                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1842                 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
1843         }
1844         txdesc.tx_control = cpu_to_le16(tx_control);
1845         txdesc.tx_rate = meta->rate;
1846
1847         data_len = skb->len - hdr_len;
1848         txdesc.data_len = cpu_to_le16(data_len);
1849         txdesc.len = cpu_to_be16(data_len);
1850
1851         idx = prism2_get_txfid_idx(local);
1852         if (idx < 0)
1853                 goto fail;
1854
1855         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1856                 hostap_dump_tx_header(dev->name, &txdesc);
1857
1858         spin_lock(&local->baplock);
1859         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1860
1861         if (!res)
1862                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1863         if (!res)
1864                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1865                                      skb->len - hdr_len);
1866         spin_unlock(&local->baplock);
1867
1868         if (!res)
1869                 res = prism2_transmit(dev, idx);
1870         if (res) {
1871                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1872                        dev->name);
1873                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1874                 schedule_work(&local->reset_queue);
1875                 goto fail;
1876         }
1877
1878         ret = 0;
1879
1880 fail:
1881         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1882         return ret;
1883 }
1884
1885
1886 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1887  * register has changed values between consecutive reads for an unknown reason.
1888  * This should really not happen, so more debugging is needed. This test
1889  * version is a bit slower, but it will detect most of such register changes
1890  * and will try to get the correct fid eventually. */
1891 #define EXTRA_FID_READ_TESTS
1892
1893 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
1894 {
1895 #ifdef EXTRA_FID_READ_TESTS
1896         u16 val, val2, val3;
1897         int i;
1898
1899         for (i = 0; i < 10; i++) {
1900                 val = HFA384X_INW(reg);
1901                 val2 = HFA384X_INW(reg);
1902                 val3 = HFA384X_INW(reg);
1903
1904                 if (val == val2 && val == val3)
1905                         return val;
1906
1907                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
1908                        " %04x %04x %04x\n",
1909                        dev->name, i, reg, val, val2, val3);
1910                 if ((val == val2 || val == val3) && val != 0)
1911                         return val;
1912                 if (val2 == val3 && val2 != 0)
1913                         return val2;
1914         }
1915         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
1916                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
1917         return val;
1918 #else /* EXTRA_FID_READ_TESTS */
1919         return HFA384X_INW(reg);
1920 #endif /* EXTRA_FID_READ_TESTS */
1921 }
1922
1923
1924 /* Called only as a tasklet (software IRQ) */
1925 static void prism2_rx(local_info_t *local)
1926 {
1927         struct net_device *dev = local->dev;
1928         int res, rx_pending = 0;
1929         u16 len, hdr_len, rxfid, status, macport;
1930         struct hfa384x_rx_frame rxdesc;
1931         struct sk_buff *skb = NULL;
1932
1933         prism2_callback(local, PRISM2_CALLBACK_RX_START);
1934
1935         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
1936 #ifndef final_version
1937         if (rxfid == 0) {
1938                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
1939                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
1940                        rxfid);
1941                 if (rxfid == 0) {
1942                         schedule_work(&local->reset_queue);
1943                         goto rx_dropped;
1944                 }
1945                 /* try to continue with the new rxfid value */
1946         }
1947 #endif
1948
1949         spin_lock(&local->baplock);
1950         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
1951         if (!res)
1952                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
1953
1954         if (res) {
1955                 spin_unlock(&local->baplock);
1956                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
1957                        res);
1958                 if (res == -ETIMEDOUT) {
1959                         schedule_work(&local->reset_queue);
1960                 }
1961                 goto rx_dropped;
1962         }
1963
1964         len = le16_to_cpu(rxdesc.data_len);
1965         hdr_len = sizeof(rxdesc);
1966         status = le16_to_cpu(rxdesc.status);
1967         macport = (status >> 8) & 0x07;
1968
1969         /* Drop frames with too large reported payload length. Monitor mode
1970          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
1971          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
1972          * macport 7 */
1973         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
1974                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
1975                         if (len >= (u16) -14) {
1976                                 hdr_len -= 65535 - len;
1977                                 hdr_len--;
1978                         }
1979                         len = 0;
1980                 } else {
1981                         spin_unlock(&local->baplock);
1982                         printk(KERN_DEBUG "%s: Received frame with invalid "
1983                                "length 0x%04x\n", dev->name, len);
1984                         hostap_dump_rx_header(dev->name, &rxdesc);
1985                         goto rx_dropped;
1986                 }
1987         }
1988
1989         skb = dev_alloc_skb(len + hdr_len);
1990         if (!skb) {
1991                 spin_unlock(&local->baplock);
1992                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
1993                        dev->name);
1994                 goto rx_dropped;
1995         }
1996         skb->dev = dev;
1997         skb_put_data(skb, &rxdesc, hdr_len);
1998
1999         if (len > 0)
2000                 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
2001         spin_unlock(&local->baplock);
2002         if (res) {
2003                 printk(KERN_DEBUG "%s: RX failed to read "
2004                        "frame data\n", dev->name);
2005                 goto rx_dropped;
2006         }
2007
2008         skb_queue_tail(&local->rx_list, skb);
2009         tasklet_schedule(&local->rx_tasklet);
2010
2011  rx_exit:
2012         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2013         if (!rx_pending) {
2014                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2015         }
2016
2017         return;
2018
2019  rx_dropped:
2020         dev->stats.rx_dropped++;
2021         if (skb)
2022                 dev_kfree_skb(skb);
2023         goto rx_exit;
2024 }
2025
2026
2027 /* Called only as a tasklet (software IRQ) */
2028 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2029 {
2030         struct hfa384x_rx_frame *rxdesc;
2031         struct net_device *dev = skb->dev;
2032         struct hostap_80211_rx_status stats;
2033         int hdrlen, rx_hdrlen;
2034
2035         rx_hdrlen = sizeof(*rxdesc);
2036         if (skb->len < sizeof(*rxdesc)) {
2037                 /* Allow monitor mode to receive shorter frames */
2038                 if (local->iw_mode == IW_MODE_MONITOR &&
2039                     skb->len >= sizeof(*rxdesc) - 30) {
2040                         rx_hdrlen = skb->len;
2041                 } else {
2042                         dev_kfree_skb(skb);
2043                         return;
2044                 }
2045         }
2046
2047         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2048
2049         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2050             skb->len >= sizeof(*rxdesc))
2051                 hostap_dump_rx_header(dev->name, rxdesc);
2052
2053         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2054             (!local->monitor_allow_fcserr ||
2055              local->iw_mode != IW_MODE_MONITOR))
2056                 goto drop;
2057
2058         if (skb->len > PRISM2_DATA_MAXLEN) {
2059                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2060                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2061                 goto drop;
2062         }
2063
2064         stats.mac_time = le32_to_cpu(rxdesc->time);
2065         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2066         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2067         stats.rate = rxdesc->rate;
2068
2069         /* Convert Prism2 RX structure into IEEE 802.11 header */
2070         hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
2071         if (hdrlen > rx_hdrlen)
2072                 hdrlen = rx_hdrlen;
2073
2074         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2075                 &rxdesc->frame_control, hdrlen);
2076
2077         hostap_80211_rx(dev, skb, &stats);
2078         return;
2079
2080  drop:
2081         dev_kfree_skb(skb);
2082 }
2083
2084
2085 /* Called only as a tasklet (software IRQ) */
2086 static void hostap_rx_tasklet(unsigned long data)
2087 {
2088         local_info_t *local = (local_info_t *) data;
2089         struct sk_buff *skb;
2090
2091         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2092                 hostap_rx_skb(local, skb);
2093 }
2094
2095
2096 /* Called only from hardware IRQ */
2097 static void prism2_alloc_ev(struct net_device *dev)
2098 {
2099         struct hostap_interface *iface;
2100         local_info_t *local;
2101         int idx;
2102         u16 fid;
2103
2104         iface = netdev_priv(dev);
2105         local = iface->local;
2106
2107         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2108
2109         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2110
2111         spin_lock(&local->txfidlock);
2112         idx = local->next_alloc;
2113
2114         do {
2115                 if (local->txfid[idx] == fid) {
2116                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2117                                idx);
2118
2119 #ifndef final_version
2120                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2121                                 printk("Already released txfid found at idx "
2122                                        "%d\n", idx);
2123                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2124                                 printk("Already reserved txfid found at idx "
2125                                        "%d\n", idx);
2126 #endif
2127                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2128                         idx++;
2129                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2130                                 idx;
2131
2132                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2133                             netif_queue_stopped(dev))
2134                                 netif_wake_queue(dev);
2135
2136                         spin_unlock(&local->txfidlock);
2137                         return;
2138                 }
2139
2140                 idx++;
2141                 if (idx >= PRISM2_TXFID_COUNT)
2142                         idx = 0;
2143         } while (idx != local->next_alloc);
2144
2145         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2146                "read 0x%04x) for alloc event\n", dev->name, fid,
2147                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2148         printk(KERN_DEBUG "TXFIDs:");
2149         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2150                 printk(" %04x[%04x]", local->txfid[idx],
2151                        local->intransmitfid[idx]);
2152         printk("\n");
2153         spin_unlock(&local->txfidlock);
2154
2155         /* FIX: should probably schedule reset; reference to one txfid was lost
2156          * completely.. Bad things will happen if we run out of txfids
2157          * Actually, this will cause netdev watchdog to notice TX timeout and
2158          * then card reset after all txfids have been leaked. */
2159 }
2160
2161
2162 /* Called only as a tasklet (software IRQ) */
2163 static void hostap_tx_callback(local_info_t *local,
2164                                struct hfa384x_tx_frame *txdesc, int ok,
2165                                char *payload)
2166 {
2167         u16 sw_support, hdrlen, len;
2168         struct sk_buff *skb;
2169         struct hostap_tx_callback_info *cb;
2170
2171         /* Make sure that frame was from us. */
2172         if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
2173                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2174                        local->dev->name);
2175                 return;
2176         }
2177
2178         sw_support = le32_to_cpu(txdesc->sw_support);
2179
2180         spin_lock(&local->lock);
2181         cb = local->tx_callback;
2182         while (cb != NULL && cb->idx != sw_support)
2183                 cb = cb->next;
2184         spin_unlock(&local->lock);
2185
2186         if (cb == NULL) {
2187                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2188                        local->dev->name, sw_support);
2189                 return;
2190         }
2191
2192         hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2193         len = le16_to_cpu(txdesc->data_len);
2194         skb = dev_alloc_skb(hdrlen + len);
2195         if (skb == NULL) {
2196                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2197                        "skb\n", local->dev->name);
2198                 return;
2199         }
2200
2201         skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
2202         if (payload)
2203                 skb_put_data(skb, payload, len);
2204
2205         skb->dev = local->dev;
2206         skb_reset_mac_header(skb);
2207
2208         cb->func(skb, ok, cb->data);
2209 }
2210
2211
2212 /* Called only as a tasklet (software IRQ) */
2213 static int hostap_tx_compl_read(local_info_t *local, int error,
2214                                 struct hfa384x_tx_frame *txdesc,
2215                                 char **payload)
2216 {
2217         u16 fid, len;
2218         int res, ret = 0;
2219         struct net_device *dev = local->dev;
2220
2221         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2222
2223         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2224
2225         spin_lock(&local->baplock);
2226         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2227         if (!res)
2228                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2229         if (res) {
2230                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2231                        "read txdesc\n", dev->name, error, fid);
2232                 if (res == -ETIMEDOUT) {
2233                         schedule_work(&local->reset_queue);
2234                 }
2235                 ret = -1;
2236                 goto fail;
2237         }
2238         if (txdesc->sw_support) {
2239                 len = le16_to_cpu(txdesc->data_len);
2240                 if (len < PRISM2_DATA_MAXLEN) {
2241                         *payload = kmalloc(len, GFP_ATOMIC);
2242                         if (*payload == NULL ||
2243                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2244                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2245                                        "frame payload\n", dev->name);
2246                                 kfree(*payload);
2247                                 *payload = NULL;
2248                                 ret = -1;
2249                                 goto fail;
2250                         }
2251                 }
2252         }
2253
2254  fail:
2255         spin_unlock(&local->baplock);
2256
2257         return ret;
2258 }
2259
2260
2261 /* Called only as a tasklet (software IRQ) */
2262 static void prism2_tx_ev(local_info_t *local)
2263 {
2264         struct net_device *dev = local->dev;
2265         char *payload = NULL;
2266         struct hfa384x_tx_frame txdesc;
2267
2268         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2269                 goto fail;
2270
2271         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2272                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2273                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2274                        "duration_id=%d\n",
2275                        dev->name, le16_to_cpu(txdesc.status),
2276                        txdesc.retry_count, txdesc.tx_rate,
2277                        le16_to_cpu(txdesc.seq_ctrl),
2278                        le16_to_cpu(txdesc.duration_id));
2279         }
2280
2281         if (txdesc.sw_support)
2282                 hostap_tx_callback(local, &txdesc, 1, payload);
2283         kfree(payload);
2284
2285  fail:
2286         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2287 }
2288
2289
2290 /* Called only as a tasklet (software IRQ) */
2291 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2292 {
2293         local_info_t *local = (local_info_t *) data;
2294         struct sk_buff *skb;
2295
2296         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2297                 struct hfa384x_tx_frame *txdesc =
2298                         (struct hfa384x_tx_frame *) skb->data;
2299
2300                 if (skb->len >= sizeof(*txdesc)) {
2301                         /* Convert Prism2 RX structure into IEEE 802.11 header
2302                          */
2303                         int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
2304                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2305                                 &txdesc->frame_control, hdrlen);
2306
2307                         hostap_handle_sta_tx_exc(local, skb);
2308                 }
2309                 dev_kfree_skb(skb);
2310         }
2311 }
2312
2313
2314 /* Called only as a tasklet (software IRQ) */
2315 static void prism2_txexc(local_info_t *local)
2316 {
2317         struct net_device *dev = local->dev;
2318         u16 status, fc;
2319         int show_dump, res;
2320         char *payload = NULL;
2321         struct hfa384x_tx_frame txdesc;
2322
2323         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2324         dev->stats.tx_errors++;
2325
2326         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2327         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2328         if (res)
2329                 return;
2330
2331         status = le16_to_cpu(txdesc.status);
2332
2333         /* We produce a TXDROP event only for retry or lifetime
2334          * exceeded, because that's the only status that really mean
2335          * that this particular node went away.
2336          * Other errors means that *we* screwed up. - Jean II */
2337         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2338         {
2339                 union iwreq_data wrqu;
2340
2341                 /* Copy 802.11 dest address. */
2342                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2343                 wrqu.addr.sa_family = ARPHRD_ETHER;
2344                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2345         } else
2346                 show_dump = 1;
2347
2348         if (local->iw_mode == IW_MODE_MASTER ||
2349             local->iw_mode == IW_MODE_REPEAT ||
2350             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2351                 struct sk_buff *skb;
2352                 skb = dev_alloc_skb(sizeof(txdesc));
2353                 if (skb) {
2354                         skb_put_data(skb, &txdesc, sizeof(txdesc));
2355                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2356                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2357                 }
2358         }
2359
2360         if (txdesc.sw_support)
2361                 hostap_tx_callback(local, &txdesc, 0, payload);
2362         kfree(payload);
2363
2364         if (!show_dump)
2365                 return;
2366
2367         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2368                " tx_control=%04x\n",
2369                dev->name, status,
2370                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2371                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2372                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2373                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2374                le16_to_cpu(txdesc.tx_control));
2375
2376         fc = le16_to_cpu(txdesc.frame_control);
2377         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2378                "(%s%s%s::%d%s%s)\n",
2379                txdesc.retry_count, txdesc.tx_rate, fc,
2380                ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
2381                ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
2382                ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
2383                (fc & IEEE80211_FCTL_STYPE) >> 4,
2384                ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
2385                ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
2386         PDEBUG(DEBUG_EXTRA, "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
2387                txdesc.addr1, txdesc.addr2,
2388                txdesc.addr3, txdesc.addr4);
2389 }
2390
2391
2392 /* Called only as a tasklet (software IRQ) */
2393 static void hostap_info_tasklet(unsigned long data)
2394 {
2395         local_info_t *local = (local_info_t *) data;
2396         struct sk_buff *skb;
2397
2398         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2399                 hostap_info_process(local, skb);
2400                 dev_kfree_skb(skb);
2401         }
2402 }
2403
2404
2405 /* Called only as a tasklet (software IRQ) */
2406 static void prism2_info(local_info_t *local)
2407 {
2408         struct net_device *dev = local->dev;
2409         u16 fid;
2410         int res, left;
2411         struct hfa384x_info_frame info;
2412         struct sk_buff *skb;
2413
2414         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2415
2416         spin_lock(&local->baplock);
2417         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2418         if (!res)
2419                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2420         if (res) {
2421                 spin_unlock(&local->baplock);
2422                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2423                        fid);
2424                 if (res == -ETIMEDOUT) {
2425                         schedule_work(&local->reset_queue);
2426                 }
2427                 goto out;
2428         }
2429
2430         left = (le16_to_cpu(info.len) - 1) * 2;
2431
2432         if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
2433                 /* data register seems to give 0x8000 in some error cases even
2434                  * though busy bit is not set in offset register;
2435                  * in addition, length must be at least 1 due to type field */
2436                 spin_unlock(&local->baplock);
2437                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2438                        "length 0x%04x (type 0x%04x)\n", dev->name,
2439                        le16_to_cpu(info.len), le16_to_cpu(info.type));
2440                 goto out;
2441         }
2442
2443         skb = dev_alloc_skb(sizeof(info) + left);
2444         if (skb == NULL) {
2445                 spin_unlock(&local->baplock);
2446                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2447                        "frame\n", dev->name);
2448                 goto out;
2449         }
2450
2451         skb_put_data(skb, &info, sizeof(info));
2452         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2453         {
2454                 spin_unlock(&local->baplock);
2455                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2456                        "len=0x%04x, type=0x%04x\n", dev->name, fid,
2457                        le16_to_cpu(info.len), le16_to_cpu(info.type));
2458                 dev_kfree_skb(skb);
2459                 goto out;
2460         }
2461         spin_unlock(&local->baplock);
2462
2463         skb_queue_tail(&local->info_list, skb);
2464         tasklet_schedule(&local->info_tasklet);
2465
2466  out:
2467         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2468 }
2469
2470
2471 /* Called only as a tasklet (software IRQ) */
2472 static void hostap_bap_tasklet(unsigned long data)
2473 {
2474         local_info_t *local = (local_info_t *) data;
2475         struct net_device *dev = local->dev;
2476         u16 ev;
2477         int frames = 30;
2478
2479         if (local->func->card_present && !local->func->card_present(local))
2480                 return;
2481
2482         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2483
2484         /* Process all pending BAP events without generating new interrupts
2485          * for them */
2486         while (frames-- > 0) {
2487                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2488                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2489                         break;
2490                 if (ev & HFA384X_EV_RX)
2491                         prism2_rx(local);
2492                 if (ev & HFA384X_EV_INFO)
2493                         prism2_info(local);
2494                 if (ev & HFA384X_EV_TX)
2495                         prism2_tx_ev(local);
2496                 if (ev & HFA384X_EV_TXEXC)
2497                         prism2_txexc(local);
2498         }
2499
2500         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2501         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2502
2503         /* Enable interrupts for new BAP events */
2504         hfa384x_events_all(dev);
2505         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2506 }
2507
2508
2509 /* Called only from hardware IRQ */
2510 static void prism2_infdrop(struct net_device *dev)
2511 {
2512         static unsigned long last_inquire = 0;
2513
2514         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2515
2516         /* some firmware versions seem to get stuck with
2517          * full CommTallies in high traffic load cases; every
2518          * packet will then cause INFDROP event and CommTallies
2519          * info frame will not be sent automatically. Try to
2520          * get out of this state by inquiring CommTallies. */
2521         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2522                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2523                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2524                 last_inquire = jiffies;
2525         }
2526 }
2527
2528
2529 /* Called only from hardware IRQ */
2530 static void prism2_ev_tick(struct net_device *dev)
2531 {
2532         struct hostap_interface *iface;
2533         local_info_t *local;
2534         u16 evstat, inten;
2535         static int prev_stuck = 0;
2536
2537         iface = netdev_priv(dev);
2538         local = iface->local;
2539
2540         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2541             local->last_tick_timer) {
2542                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2543                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2544                 if (!prev_stuck) {
2545                         printk(KERN_INFO "%s: SW TICK stuck? "
2546                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2547                                dev->name, local->bits, evstat, inten);
2548                 }
2549                 local->sw_tick_stuck++;
2550                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2551                     (inten & HFA384X_BAP0_EVENTS)) {
2552                         printk(KERN_INFO "%s: trying to recover from IRQ "
2553                                "hang\n", dev->name);
2554                         hfa384x_events_no_bap0(dev);
2555                 }
2556                 prev_stuck = 1;
2557         } else
2558                 prev_stuck = 0;
2559 }
2560
2561
2562 /* Called only from hardware IRQ */
2563 static void prism2_check_magic(local_info_t *local)
2564 {
2565         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2566          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2567          * register once or twice seems to get the correct value.. PCI cards
2568          * cannot anyway be removed during normal operation, so there is not
2569          * really any need for this verification with them. */
2570
2571 #ifndef PRISM2_PCI
2572 #ifndef final_version
2573         static unsigned long last_magic_err = 0;
2574         struct net_device *dev = local->dev;
2575
2576         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2577                 if (!local->hw_ready)
2578                         return;
2579                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2580                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2581                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2582                                "%04X != %04X - card removed?\n", dev->name,
2583                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2584                                HFA384X_MAGIC);
2585                         last_magic_err = jiffies;
2586                 } else if (net_ratelimit()) {
2587                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2588                                "MAGIC=%04x\n", dev->name,
2589                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2590                                HFA384X_MAGIC);
2591                 }
2592                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2593                         schedule_work(&local->reset_queue);
2594                 return;
2595         }
2596 #endif /* final_version */
2597 #endif /* !PRISM2_PCI */
2598 }
2599
2600
2601 /* Called only from hardware IRQ */
2602 static irqreturn_t prism2_interrupt(int irq, void *dev_id)
2603 {
2604         struct net_device *dev = dev_id;
2605         struct hostap_interface *iface;
2606         local_info_t *local;
2607         int events = 0;
2608         u16 ev;
2609
2610         iface = netdev_priv(dev);
2611         local = iface->local;
2612
2613         /* Detect early interrupt before driver is fully configured */
2614         spin_lock(&local->irq_init_lock);
2615         if (!dev->base_addr) {
2616                 if (net_ratelimit()) {
2617                         printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
2618                                dev->name);
2619                 }
2620                 spin_unlock(&local->irq_init_lock);
2621                 return IRQ_HANDLED;
2622         }
2623         spin_unlock(&local->irq_init_lock);
2624
2625         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2626
2627         if (local->func->card_present && !local->func->card_present(local)) {
2628                 if (net_ratelimit()) {
2629                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2630                                dev->name);
2631                 }
2632                 return IRQ_HANDLED;
2633         }
2634
2635         prism2_check_magic(local);
2636
2637         for (;;) {
2638                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2639                 if (ev == 0xffff) {
2640                         if (local->shutdown)
2641                                 return IRQ_HANDLED;
2642                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2643                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2644                                dev->name);
2645                         return IRQ_HANDLED;
2646                 }
2647
2648                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2649                 if (ev == 0)
2650                         break;
2651
2652                 if (ev & HFA384X_EV_CMD) {
2653                         prism2_cmd_ev(dev);
2654                 }
2655
2656                 /* Above events are needed even before hw is ready, but other
2657                  * events should be skipped during initialization. This may
2658                  * change for AllocEv if allocate_fid is implemented without
2659                  * busy waiting. */
2660                 if (!local->hw_ready || local->hw_resetting ||
2661                     !local->dev_enabled) {
2662                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2663                         if (ev & HFA384X_EV_CMD)
2664                                 goto next_event;
2665                         if ((ev & HFA384X_EVENT_MASK) == 0)
2666                                 return IRQ_HANDLED;
2667                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2668                             net_ratelimit()) {
2669                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2670                                        "not ready; skipping events 0x%04x "
2671                                        "(IntEn=0x%04x)%s%s%s\n",
2672                                        dev->name, ev,
2673                                        HFA384X_INW(HFA384X_INTEN_OFF),
2674                                        !local->hw_ready ? " (!hw_ready)" : "",
2675                                        local->hw_resetting ?
2676                                        " (hw_resetting)" : "",
2677                                        !local->dev_enabled ?
2678                                        " (!dev_enabled)" : "");
2679                         }
2680                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2681                         return IRQ_HANDLED;
2682                 }
2683
2684                 if (ev & HFA384X_EV_TICK) {
2685                         prism2_ev_tick(dev);
2686                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2687                 }
2688
2689                 if (ev & HFA384X_EV_ALLOC) {
2690                         prism2_alloc_ev(dev);
2691                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2692                 }
2693
2694                 /* Reading data from the card is quite time consuming, so do it
2695                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2696                  * and unmasked after needed data has been read completely. */
2697                 if (ev & HFA384X_BAP0_EVENTS) {
2698                         hfa384x_events_no_bap0(dev);
2699                         tasklet_schedule(&local->bap_tasklet);
2700                 }
2701
2702 #ifndef final_version
2703                 if (ev & HFA384X_EV_WTERR) {
2704                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2705                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2706                 }
2707 #endif /* final_version */
2708
2709                 if (ev & HFA384X_EV_INFDROP) {
2710                         prism2_infdrop(dev);
2711                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2712                 }
2713
2714         next_event:
2715                 events++;
2716                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2717                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2718                                "(EvStat=0x%04x)\n",
2719                                PRISM2_MAX_INTERRUPT_EVENTS,
2720                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2721                         break;
2722                 }
2723         }
2724         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2725         return IRQ_RETVAL(events);
2726 }
2727
2728
2729 static void prism2_check_sta_fw_version(local_info_t *local)
2730 {
2731         struct hfa384x_comp_ident comp;
2732         int id, variant, major, minor;
2733
2734         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2735                             &comp, sizeof(comp), 1) < 0)
2736                 return;
2737
2738         local->fw_ap = 0;
2739         id = le16_to_cpu(comp.id);
2740         if (id != HFA384X_COMP_ID_STA) {
2741                 if (id == HFA384X_COMP_ID_FW_AP)
2742                         local->fw_ap = 1;
2743                 return;
2744         }
2745
2746         major = __le16_to_cpu(comp.major);
2747         minor = __le16_to_cpu(comp.minor);
2748         variant = __le16_to_cpu(comp.variant);
2749         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2750
2751         /* Station firmware versions before 1.4.x seem to have a bug in
2752          * firmware-based WEP encryption when using Host AP mode, so use
2753          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2754          * first one that has been seen to produce correct encryption, but the
2755          * bug might be fixed before that (although, at least 1.4.2 is broken).
2756          */
2757         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2758
2759         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2760             !local->fw_encrypt_ok) {
2761                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2762                        "a workaround for firmware bug in Host AP mode WEP\n",
2763                        local->dev->name);
2764                 local->host_encrypt = 1;
2765         }
2766
2767         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2768          * in station firmware versions before 1.5.x. With these versions, the
2769          * driver uses a workaround with bogus frame format (4th address after
2770          * the payload). This is not compatible with other AP devices. Since
2771          * the firmware bug is fixed in the latest station firmware versions,
2772          * automatically enable standard compliant mode for cards using station
2773          * firmware version 1.5.0 or newer. */
2774         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2775                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2776         else {
2777                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2778                        "workaround for firmware bug in Host AP mode WDS\n",
2779                        local->dev->name);
2780         }
2781
2782         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2783 }
2784
2785
2786 static void hostap_passive_scan(struct timer_list *t)
2787 {
2788         local_info_t *local = from_timer(local, t, passive_scan_timer);
2789         struct net_device *dev = local->dev;
2790         u16 chan;
2791
2792         if (local->passive_scan_interval <= 0)
2793                 return;
2794
2795         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
2796                 int max_tries = 16;
2797
2798                 /* Even though host system does not really know when the WLAN
2799                  * MAC is sending frames, try to avoid changing channels for
2800                  * passive scanning when a host-generated frame is being
2801                  * transmitted */
2802                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
2803                         printk(KERN_DEBUG "%s: passive scan detected pending "
2804                                "TX - delaying\n", dev->name);
2805                         local->passive_scan_timer.expires = jiffies + HZ / 10;
2806                         add_timer(&local->passive_scan_timer);
2807                         return;
2808                 }
2809
2810                 do {
2811                         local->passive_scan_channel++;
2812                         if (local->passive_scan_channel > 14)
2813                                 local->passive_scan_channel = 1;
2814                         max_tries--;
2815                 } while (!(local->channel_mask &
2816                            (1 << (local->passive_scan_channel - 1))) &&
2817                          max_tries > 0);
2818
2819                 if (max_tries == 0) {
2820                         printk(KERN_INFO "%s: no allowed passive scan channels"
2821                                " found\n", dev->name);
2822                         return;
2823                 }
2824
2825                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
2826                        dev->name, local->passive_scan_channel);
2827                 chan = local->passive_scan_channel;
2828                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
2829                 local->passive_scan_timer.expires = jiffies + HZ / 10;
2830         } else {
2831                 chan = local->channel;
2832                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
2833                 local->passive_scan_timer.expires = jiffies +
2834                         local->passive_scan_interval * HZ;
2835         }
2836
2837         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
2838                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
2839                                  chan, NULL, 0))
2840                 printk(KERN_ERR "%s: passive scan channel set %d "
2841                        "failed\n", dev->name, chan);
2842
2843         add_timer(&local->passive_scan_timer);
2844 }
2845
2846
2847 /* Called only as a scheduled task when communications quality values should
2848  * be updated. */
2849 static void handle_comms_qual_update(struct work_struct *work)
2850 {
2851         local_info_t *local =
2852                 container_of(work, local_info_t, comms_qual_update);
2853         prism2_update_comms_qual(local->dev);
2854 }
2855
2856
2857 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
2858  * used to monitor that local->last_tick_timer is being updated. If not,
2859  * interrupt busy-loop is assumed and driver tries to recover by masking out
2860  * some events. */
2861 static void hostap_tick_timer(struct timer_list *t)
2862 {
2863         static unsigned long last_inquire = 0;
2864         local_info_t *local = from_timer(local, t, tick_timer);
2865         local->last_tick_timer = jiffies;
2866
2867         /* Inquire CommTallies every 10 seconds to keep the statistics updated
2868          * more often during low load and when using 32-bit tallies. */
2869         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
2870             !local->hw_downloading && local->hw_ready &&
2871             !local->hw_resetting && local->dev_enabled) {
2872                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
2873                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2874                 last_inquire = jiffies;
2875         }
2876
2877         if ((local->last_comms_qual_update == 0 ||
2878              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
2879             (local->iw_mode == IW_MODE_INFRA ||
2880              local->iw_mode == IW_MODE_ADHOC)) {
2881                 schedule_work(&local->comms_qual_update);
2882         }
2883
2884         local->tick_timer.expires = jiffies + 2 * HZ;
2885         add_timer(&local->tick_timer);
2886 }
2887
2888
2889 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
2890 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
2891 {
2892         return HFA384X_INW(reg);
2893 }
2894
2895 static int prism2_registers_proc_show(struct seq_file *m, void *v)
2896 {
2897         local_info_t *local = m->private;
2898
2899 #define SHOW_REG(n) \
2900   seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
2901
2902         SHOW_REG(CMD);
2903         SHOW_REG(PARAM0);
2904         SHOW_REG(PARAM1);
2905         SHOW_REG(PARAM2);
2906         SHOW_REG(STATUS);
2907         SHOW_REG(RESP0);
2908         SHOW_REG(RESP1);
2909         SHOW_REG(RESP2);
2910         SHOW_REG(INFOFID);
2911         SHOW_REG(CONTROL);
2912         SHOW_REG(SELECT0);
2913         SHOW_REG(SELECT1);
2914         SHOW_REG(OFFSET0);
2915         SHOW_REG(OFFSET1);
2916         SHOW_REG(RXFID);
2917         SHOW_REG(ALLOCFID);
2918         SHOW_REG(TXCOMPLFID);
2919         SHOW_REG(SWSUPPORT0);
2920         SHOW_REG(SWSUPPORT1);
2921         SHOW_REG(SWSUPPORT2);
2922         SHOW_REG(EVSTAT);
2923         SHOW_REG(INTEN);
2924         SHOW_REG(EVACK);
2925         /* Do not read data registers, because they change the state of the
2926          * MAC (offset += 2) */
2927         /* SHOW_REG(DATA0); */
2928         /* SHOW_REG(DATA1); */
2929         SHOW_REG(AUXPAGE);
2930         SHOW_REG(AUXOFFSET);
2931         /* SHOW_REG(AUXDATA); */
2932 #ifdef PRISM2_PCI
2933         SHOW_REG(PCICOR);
2934         SHOW_REG(PCIHCR);
2935         SHOW_REG(PCI_M0_ADDRH);
2936         SHOW_REG(PCI_M0_ADDRL);
2937         SHOW_REG(PCI_M0_LEN);
2938         SHOW_REG(PCI_M0_CTL);
2939         SHOW_REG(PCI_STATUS);
2940         SHOW_REG(PCI_M1_ADDRH);
2941         SHOW_REG(PCI_M1_ADDRL);
2942         SHOW_REG(PCI_M1_LEN);
2943         SHOW_REG(PCI_M1_CTL);
2944 #endif /* PRISM2_PCI */
2945
2946         return 0;
2947 }
2948 #endif
2949
2950 struct set_tim_data {
2951         struct list_head list;
2952         int aid;
2953         int set;
2954 };
2955
2956 static int prism2_set_tim(struct net_device *dev, int aid, int set)
2957 {
2958         struct list_head *ptr;
2959         struct set_tim_data *new_entry;
2960         struct hostap_interface *iface;
2961         local_info_t *local;
2962
2963         iface = netdev_priv(dev);
2964         local = iface->local;
2965
2966         new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
2967         if (new_entry == NULL)
2968                 return -ENOMEM;
2969
2970         new_entry->aid = aid;
2971         new_entry->set = set;
2972
2973         spin_lock_bh(&local->set_tim_lock);
2974         list_for_each(ptr, &local->set_tim_list) {
2975                 struct set_tim_data *entry =
2976                         list_entry(ptr, struct set_tim_data, list);
2977                 if (entry->aid == aid) {
2978                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
2979                                "set=%d ==> %d\n",
2980                                local->dev->name, aid, entry->set, set);
2981                         entry->set = set;
2982                         kfree(new_entry);
2983                         new_entry = NULL;
2984                         break;
2985                 }
2986         }
2987         if (new_entry)
2988                 list_add_tail(&new_entry->list, &local->set_tim_list);
2989         spin_unlock_bh(&local->set_tim_lock);
2990
2991         schedule_work(&local->set_tim_queue);
2992
2993         return 0;
2994 }
2995
2996
2997 static void handle_set_tim_queue(struct work_struct *work)
2998 {
2999         local_info_t *local = container_of(work, local_info_t, set_tim_queue);
3000         struct set_tim_data *entry;
3001         u16 val;
3002
3003         for (;;) {
3004                 entry = NULL;
3005                 spin_lock_bh(&local->set_tim_lock);
3006                 if (!list_empty(&local->set_tim_list)) {
3007                         entry = list_entry(local->set_tim_list.next,
3008                                            struct set_tim_data, list);
3009                         list_del(&entry->list);
3010                 }
3011                 spin_unlock_bh(&local->set_tim_lock);
3012                 if (!entry)
3013                         break;
3014
3015                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3016                        local->dev->name, entry->aid, entry->set);
3017
3018                 val = entry->aid;
3019                 if (entry->set)
3020                         val |= 0x8000;
3021                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3022                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3023                                "set=%d)\n",
3024                                local->dev->name, entry->aid, entry->set);
3025                 }
3026
3027                 kfree(entry);
3028         }
3029 }
3030
3031
3032 static void prism2_clear_set_tim_queue(local_info_t *local)
3033 {
3034         struct list_head *ptr, *n;
3035
3036         list_for_each_safe(ptr, n, &local->set_tim_list) {
3037                 struct set_tim_data *entry;
3038                 entry = list_entry(ptr, struct set_tim_data, list);
3039                 list_del(&entry->list);
3040                 kfree(entry);
3041         }
3042 }
3043
3044 static struct net_device *
3045 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3046                        struct device *sdev)
3047 {
3048         struct net_device *dev;
3049         struct hostap_interface *iface;
3050         struct local_info *local;
3051         int len, i, ret;
3052
3053         if (funcs == NULL)
3054                 return NULL;
3055
3056         len = strlen(dev_template);
3057         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3058                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3059                        dev_template);
3060                 return NULL;
3061         }
3062
3063         len = sizeof(struct hostap_interface) +
3064                 3 + sizeof(struct local_info) +
3065                 3 + sizeof(struct ap_data);
3066
3067         dev = alloc_etherdev(len);
3068         if (dev == NULL)
3069                 return NULL;
3070
3071         iface = netdev_priv(dev);
3072         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3073         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3074         local->dev = iface->dev = dev;
3075         iface->local = local;
3076         iface->type = HOSTAP_INTERFACE_MASTER;
3077         INIT_LIST_HEAD(&local->hostap_interfaces);
3078
3079         local->hw_module = THIS_MODULE;
3080
3081 #ifdef PRISM2_IO_DEBUG
3082         local->io_debug_enabled = 1;
3083 #endif /* PRISM2_IO_DEBUG */
3084
3085         local->func = funcs;
3086         local->func->cmd = hfa384x_cmd;
3087         local->func->read_regs = hfa384x_read_regs;
3088         local->func->get_rid = hfa384x_get_rid;
3089         local->func->set_rid = hfa384x_set_rid;
3090         local->func->hw_enable = prism2_hw_enable;
3091         local->func->hw_config = prism2_hw_config;
3092         local->func->hw_reset = prism2_hw_reset;
3093         local->func->hw_shutdown = prism2_hw_shutdown;
3094         local->func->reset_port = prism2_reset_port;
3095         local->func->schedule_reset = prism2_schedule_reset;
3096 #ifdef PRISM2_DOWNLOAD_SUPPORT
3097         local->func->read_aux_fops = &prism2_download_aux_dump_proc_fops;
3098         local->func->download = prism2_download;
3099 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3100         local->func->tx = prism2_tx_80211;
3101         local->func->set_tim = prism2_set_tim;
3102         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3103                                             * skb->data (FIX: maybe for DMA bus
3104                                             * mastering? */
3105
3106         local->mtu = mtu;
3107
3108         rwlock_init(&local->iface_lock);
3109         spin_lock_init(&local->txfidlock);
3110         spin_lock_init(&local->cmdlock);
3111         spin_lock_init(&local->baplock);
3112         spin_lock_init(&local->lock);
3113         spin_lock_init(&local->irq_init_lock);
3114         mutex_init(&local->rid_bap_mtx);
3115
3116         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3117                 card_idx = 0;
3118         local->card_idx = card_idx;
3119
3120         len = strlen(essid);
3121         memcpy(local->essid, essid,
3122                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3123         local->essid[MAX_SSID_LEN] = '\0';
3124         i = GET_INT_PARM(iw_mode, card_idx);
3125         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3126             i == IW_MODE_MONITOR) {
3127                 local->iw_mode = i;
3128         } else {
3129                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3130                        "IW_MODE_MASTER\n", i);
3131                 local->iw_mode = IW_MODE_MASTER;
3132         }
3133         local->channel = GET_INT_PARM(channel, card_idx);
3134         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3135         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3136         local->wds_max_connections = 16;
3137         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3138         local->manual_retry_count = -1;
3139         local->rts_threshold = 2347;
3140         local->fragm_threshold = 2346;
3141         local->rssi_to_dBm = 100; /* default; to be overriden by
3142                                    * cnfDbmAdjust, if available */
3143         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3144         local->sram_type = -1;
3145         local->scan_channel_mask = 0xffff;
3146         local->monitor_type = PRISM2_MONITOR_RADIOTAP;
3147
3148         /* Initialize task queue structures */
3149         INIT_WORK(&local->reset_queue, handle_reset_queue);
3150         INIT_WORK(&local->set_multicast_list_queue,
3151                   hostap_set_multicast_list_queue);
3152
3153         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
3154         INIT_LIST_HEAD(&local->set_tim_list);
3155         spin_lock_init(&local->set_tim_lock);
3156
3157         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
3158
3159         /* Initialize tasklets for handling hardware IRQ related operations
3160          * outside hw IRQ handler */
3161 #define HOSTAP_TASKLET_INIT(q, f, d) \
3162 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3163 while (0)
3164         HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3165                             (unsigned long) local);
3166
3167         HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3168                             (unsigned long) local);
3169         hostap_info_init(local);
3170
3171         HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3172                             hostap_rx_tasklet, (unsigned long) local);
3173         skb_queue_head_init(&local->rx_list);
3174
3175         HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3176                             hostap_sta_tx_exc_tasklet, (unsigned long) local);
3177         skb_queue_head_init(&local->sta_tx_exc_list);
3178
3179         INIT_LIST_HEAD(&local->cmd_queue);
3180         init_waitqueue_head(&local->hostscan_wq);
3181
3182         lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
3183
3184         timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
3185         timer_setup(&local->tick_timer, hostap_tick_timer, 0);
3186         local->tick_timer.expires = jiffies + 2 * HZ;
3187         add_timer(&local->tick_timer);
3188
3189         INIT_LIST_HEAD(&local->bss_list);
3190
3191         hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
3192
3193         dev->type = ARPHRD_IEEE80211;
3194         dev->header_ops = &hostap_80211_ops;
3195
3196         rtnl_lock();
3197         ret = dev_alloc_name(dev, "wifi%d");
3198         SET_NETDEV_DEV(dev, sdev);
3199         if (ret >= 0)
3200                 ret = register_netdevice(dev);
3201
3202         rtnl_unlock();
3203         if (ret < 0) {
3204                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3205                        dev_info);
3206                 goto fail;
3207         }
3208         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3209
3210         hostap_init_data(local);
3211         return dev;
3212
3213  fail:
3214         free_netdev(dev);
3215         return NULL;
3216 }
3217
3218
3219 static int hostap_hw_ready(struct net_device *dev)
3220 {
3221         struct hostap_interface *iface;
3222         struct local_info *local;
3223
3224         iface = netdev_priv(dev);
3225         local = iface->local;
3226         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3227                                            "", dev_template);
3228
3229         if (local->ddev) {
3230                 if (local->iw_mode == IW_MODE_INFRA ||
3231                     local->iw_mode == IW_MODE_ADHOC) {
3232                         netif_carrier_off(local->dev);
3233                         netif_carrier_off(local->ddev);
3234                 }
3235                 hostap_init_proc(local);
3236 #ifndef PRISM2_NO_PROCFS_DEBUG
3237                 proc_create_single_data("registers", 0, local->proc,
3238                                  prism2_registers_proc_show, local);
3239 #endif /* PRISM2_NO_PROCFS_DEBUG */
3240                 hostap_init_ap_proc(local);
3241                 return 0;
3242         }
3243
3244         return -1;
3245 }
3246
3247
3248 static void prism2_free_local_data(struct net_device *dev)
3249 {
3250         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3251         int i;
3252         struct hostap_interface *iface;
3253         struct local_info *local;
3254         struct list_head *ptr, *n;
3255
3256         if (dev == NULL)
3257                 return;
3258
3259         iface = netdev_priv(dev);
3260         local = iface->local;
3261
3262         /* Unregister all netdevs before freeing local data. */
3263         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3264                 iface = list_entry(ptr, struct hostap_interface, list);
3265                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3266                         /* special handling for this interface below */
3267                         continue;
3268                 }
3269                 hostap_remove_interface(iface->dev, 0, 1);
3270         }
3271
3272         unregister_netdev(local->dev);
3273
3274         flush_work(&local->reset_queue);
3275         flush_work(&local->set_multicast_list_queue);
3276         flush_work(&local->set_tim_queue);
3277 #ifndef PRISM2_NO_STATION_MODES
3278         flush_work(&local->info_queue);
3279 #endif
3280         flush_work(&local->comms_qual_update);
3281
3282         lib80211_crypt_info_free(&local->crypt_info);
3283
3284         if (timer_pending(&local->passive_scan_timer))
3285                 del_timer(&local->passive_scan_timer);
3286
3287         if (timer_pending(&local->tick_timer))
3288                 del_timer(&local->tick_timer);
3289
3290         prism2_clear_cmd_queue(local);
3291
3292         skb_queue_purge(&local->info_list);
3293         skb_queue_purge(&local->rx_list);
3294         skb_queue_purge(&local->sta_tx_exc_list);
3295
3296         if (local->dev_enabled)
3297                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3298
3299         if (local->ap != NULL)
3300                 hostap_free_data(local->ap);
3301
3302 #ifndef PRISM2_NO_PROCFS_DEBUG
3303         if (local->proc != NULL)
3304                 remove_proc_entry("registers", local->proc);
3305 #endif /* PRISM2_NO_PROCFS_DEBUG */
3306         hostap_remove_proc(local);
3307
3308         tx_cb = local->tx_callback;
3309         while (tx_cb != NULL) {
3310                 tx_cb_prev = tx_cb;
3311                 tx_cb = tx_cb->next;
3312                 kfree(tx_cb_prev);
3313         }
3314
3315         hostap_set_hostapd(local, 0, 0);
3316         hostap_set_hostapd_sta(local, 0, 0);
3317
3318         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3319                 if (local->frag_cache[i].skb != NULL)
3320                         dev_kfree_skb(local->frag_cache[i].skb);
3321         }
3322
3323 #ifdef PRISM2_DOWNLOAD_SUPPORT
3324         prism2_download_free_data(local->dl_pri);
3325         prism2_download_free_data(local->dl_sec);
3326 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3327
3328         prism2_clear_set_tim_queue(local);
3329
3330         list_for_each_safe(ptr, n, &local->bss_list) {
3331                 struct hostap_bss_info *bss =
3332                         list_entry(ptr, struct hostap_bss_info, list);
3333                 kfree(bss);
3334         }
3335
3336         kfree(local->pda);
3337         kfree(local->last_scan_results);
3338         kfree(local->generic_elem);
3339
3340         free_netdev(local->dev);
3341 }
3342
3343
3344 #if (defined(PRISM2_PCI) && defined(CONFIG_PM)) || defined(PRISM2_PCCARD)
3345 static void prism2_suspend(struct net_device *dev)
3346 {
3347         struct hostap_interface *iface;
3348         struct local_info *local;
3349         union iwreq_data wrqu;
3350
3351         iface = netdev_priv(dev);
3352         local = iface->local;
3353
3354         /* Send disconnect event, e.g., to trigger reassociation after resume
3355          * if wpa_supplicant is used. */
3356         memset(&wrqu, 0, sizeof(wrqu));
3357         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3358         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3359
3360         /* Disable hardware and firmware */
3361         prism2_hw_shutdown(dev, 0);
3362 }
3363 #endif /* (PRISM2_PCI && CONFIG_PM) || PRISM2_PCCARD */
3364
3365
3366 /* These might at some point be compiled separately and used as separate
3367  * kernel modules or linked into one */
3368 #ifdef PRISM2_DOWNLOAD_SUPPORT
3369 #include "hostap_download.c"
3370 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3371
3372 #ifdef PRISM2_CALLBACK
3373 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3374  * This can use platform specific code and must define prism2_callback()
3375  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3376  * used. */
3377 #include "hostap_callback.c"
3378 #endif /* PRISM2_CALLBACK */