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 proc_ops prism2_download_aux_dump_proc_ops; 130 static u8 * prism2_read_pda(struct net_device *dev); 131 static int prism2_download(local_info_t *local, 132 struct prism2_download_param *param); 133 static void prism2_download_free_data(struct prism2_download_data *dl); 134 static int prism2_download_volatile(local_info_t *local, 135 struct prism2_download_data *param); 136 static int prism2_download_genesis(local_info_t *local, 137 struct prism2_download_data *param); 138 static int prism2_get_ram_size(local_info_t *local); 139 #endif /* PRISM2_DOWNLOAD_SUPPORT */ 140 141 142 143 144 #ifndef final_version 145 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still 146 * present */ 147 #define HFA384X_MAGIC 0x8A32 148 #endif 149 150 static void hfa384x_read_regs(struct net_device *dev, 151 struct hfa384x_regs *regs) 152 { 153 regs->cmd = HFA384X_INW(HFA384X_CMD_OFF); 154 regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF); 155 regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF); 156 regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF); 157 regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF); 158 } 159 160 161 /** 162 * __hostap_cmd_queue_free - Free Prism2 command queue entry (private) 163 * @local: pointer to private Host AP driver data 164 * @entry: Prism2 command queue entry to be freed 165 * @del_req: request the entry to be removed 166 * 167 * Internal helper function for freeing Prism2 command queue entries. 168 * Caller must have acquired local->cmdlock before calling this function. 169 */ 170 static inline void __hostap_cmd_queue_free(local_info_t *local, 171 struct hostap_cmd_queue *entry, 172 int del_req) 173 { 174 if (del_req) { 175 entry->del_req = 1; 176 if (!list_empty(&entry->list)) { 177 list_del_init(&entry->list); 178 local->cmd_queue_len--; 179 } 180 } 181 182 if (refcount_dec_and_test(&entry->usecnt) && entry->del_req) 183 kfree(entry); 184 } 185 186 187 /** 188 * hostap_cmd_queue_free - Free Prism2 command queue entry 189 * @local: pointer to private Host AP driver data 190 * @entry: Prism2 command queue entry to be freed 191 * @del_req: request the entry to be removed 192 * 193 * Free a Prism2 command queue entry. 194 */ 195 static inline void hostap_cmd_queue_free(local_info_t *local, 196 struct hostap_cmd_queue *entry, 197 int del_req) 198 { 199 unsigned long flags; 200 201 spin_lock_irqsave(&local->cmdlock, flags); 202 __hostap_cmd_queue_free(local, entry, del_req); 203 spin_unlock_irqrestore(&local->cmdlock, flags); 204 } 205 206 207 /** 208 * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries 209 * @local: pointer to private Host AP driver data 210 */ 211 static void prism2_clear_cmd_queue(local_info_t *local) 212 { 213 struct list_head *ptr, *n; 214 unsigned long flags; 215 struct hostap_cmd_queue *entry; 216 217 spin_lock_irqsave(&local->cmdlock, flags); 218 list_for_each_safe(ptr, n, &local->cmd_queue) { 219 entry = list_entry(ptr, struct hostap_cmd_queue, list); 220 refcount_inc(&entry->usecnt); 221 printk(KERN_DEBUG "%s: removed pending cmd_queue entry " 222 "(type=%d, cmd=0x%04x, param0=0x%04x)\n", 223 local->dev->name, entry->type, entry->cmd, 224 entry->param0); 225 __hostap_cmd_queue_free(local, entry, 1); 226 } 227 if (local->cmd_queue_len) { 228 /* This should not happen; print debug message and clear 229 * queue length. */ 230 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after " 231 "flush\n", local->dev->name, local->cmd_queue_len); 232 local->cmd_queue_len = 0; 233 } 234 spin_unlock_irqrestore(&local->cmdlock, flags); 235 } 236 237 238 /** 239 * hfa384x_cmd_issue - Issue a Prism2 command to the hardware 240 * @dev: pointer to net_device 241 * @entry: Prism2 command queue entry to be issued 242 */ 243 static int hfa384x_cmd_issue(struct net_device *dev, 244 struct hostap_cmd_queue *entry) 245 { 246 struct hostap_interface *iface; 247 local_info_t *local; 248 int tries; 249 u16 reg; 250 unsigned long flags; 251 252 iface = netdev_priv(dev); 253 local = iface->local; 254 255 if (local->func->card_present && !local->func->card_present(local)) 256 return -ENODEV; 257 258 if (entry->issued) { 259 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n", 260 dev->name, entry); 261 } 262 263 /* wait until busy bit is clear; this should always be clear since the 264 * commands are serialized */ 265 tries = HFA384X_CMD_BUSY_TIMEOUT; 266 while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) { 267 tries--; 268 udelay(1); 269 } 270 #ifndef final_version 271 if (tries != HFA384X_CMD_BUSY_TIMEOUT) { 272 prism2_io_debug_error(dev, 1); 273 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy " 274 "for %d usec\n", dev->name, 275 HFA384X_CMD_BUSY_TIMEOUT - tries); 276 } 277 #endif 278 if (tries == 0) { 279 reg = HFA384X_INW(HFA384X_CMD_OFF); 280 prism2_io_debug_error(dev, 2); 281 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - " 282 "reg=0x%04x\n", dev->name, reg); 283 return -ETIMEDOUT; 284 } 285 286 /* write command */ 287 spin_lock_irqsave(&local->cmdlock, flags); 288 HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF); 289 HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF); 290 HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF); 291 entry->issued = 1; 292 spin_unlock_irqrestore(&local->cmdlock, flags); 293 294 return 0; 295 } 296 297 298 /** 299 * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion 300 * @dev: pointer to net_device 301 * @cmd: Prism2 command code (HFA384X_CMD_CODE_*) 302 * @param0: value for Param0 register 303 * @param1: value for Param1 register (pointer; %NULL if not used) 304 * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed 305 * 306 * Issue given command (possibly after waiting in command queue) and sleep 307 * until the command is completed (or timed out or interrupted). This can be 308 * called only from user process context. 309 */ 310 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0, 311 u16 *param1, u16 *resp0) 312 { 313 struct hostap_interface *iface; 314 local_info_t *local; 315 int err, res, issue, issued = 0; 316 unsigned long flags; 317 struct hostap_cmd_queue *entry; 318 DECLARE_WAITQUEUE(wait, current); 319 320 iface = netdev_priv(dev); 321 local = iface->local; 322 323 if (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; 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 if (ieee80211_is_data(txdesc.frame_control) && 1830 ieee80211_has_a4(txdesc.frame_control) && 1831 skb->len >= 30) { 1832 /* Addr4 */ 1833 skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4, 1834 ETH_ALEN); 1835 hdr_len += ETH_ALEN; 1836 } 1837 1838 tx_control = local->tx_control; 1839 if (meta->tx_cb_idx) { 1840 tx_control |= HFA384X_TX_CTRL_TX_OK; 1841 txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx); 1842 } 1843 txdesc.tx_control = cpu_to_le16(tx_control); 1844 txdesc.tx_rate = meta->rate; 1845 1846 data_len = skb->len - hdr_len; 1847 txdesc.data_len = cpu_to_le16(data_len); 1848 txdesc.len = cpu_to_be16(data_len); 1849 1850 idx = prism2_get_txfid_idx(local); 1851 if (idx < 0) 1852 goto fail; 1853 1854 if (local->frame_dump & PRISM2_DUMP_TX_HDR) 1855 hostap_dump_tx_header(dev->name, &txdesc); 1856 1857 spin_lock(&local->baplock); 1858 res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0); 1859 1860 if (!res) 1861 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc)); 1862 if (!res) 1863 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len, 1864 skb->len - hdr_len); 1865 spin_unlock(&local->baplock); 1866 1867 if (!res) 1868 res = prism2_transmit(dev, idx); 1869 if (res) { 1870 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n", 1871 dev->name); 1872 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY; 1873 schedule_work(&local->reset_queue); 1874 goto fail; 1875 } 1876 1877 ret = 0; 1878 1879 fail: 1880 prism2_callback(local, PRISM2_CALLBACK_TX_END); 1881 return ret; 1882 } 1883 1884 1885 /* Some SMP systems have reported number of odd errors with hostap_pci. fid 1886 * register has changed values between consecutive reads for an unknown reason. 1887 * This should really not happen, so more debugging is needed. This test 1888 * version is a bit slower, but it will detect most of such register changes 1889 * and will try to get the correct fid eventually. */ 1890 #define EXTRA_FID_READ_TESTS 1891 1892 static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg) 1893 { 1894 #ifdef EXTRA_FID_READ_TESTS 1895 u16 val, val2, val3; 1896 int i; 1897 1898 for (i = 0; i < 10; i++) { 1899 val = HFA384X_INW(reg); 1900 val2 = HFA384X_INW(reg); 1901 val3 = HFA384X_INW(reg); 1902 1903 if (val == val2 && val == val3) 1904 return val; 1905 1906 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):" 1907 " %04x %04x %04x\n", 1908 dev->name, i, reg, val, val2, val3); 1909 if ((val == val2 || val == val3) && val != 0) 1910 return val; 1911 if (val2 == val3 && val2 != 0) 1912 return val2; 1913 } 1914 printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg " 1915 "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3); 1916 return val; 1917 #else /* EXTRA_FID_READ_TESTS */ 1918 return HFA384X_INW(reg); 1919 #endif /* EXTRA_FID_READ_TESTS */ 1920 } 1921 1922 1923 /* Called only as a tasklet (software IRQ) */ 1924 static void prism2_rx(local_info_t *local) 1925 { 1926 struct net_device *dev = local->dev; 1927 int res, rx_pending = 0; 1928 u16 len, hdr_len, rxfid, status, macport; 1929 struct hfa384x_rx_frame rxdesc; 1930 struct sk_buff *skb = NULL; 1931 1932 prism2_callback(local, PRISM2_CALLBACK_RX_START); 1933 1934 rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF); 1935 #ifndef final_version 1936 if (rxfid == 0) { 1937 rxfid = HFA384X_INW(HFA384X_RXFID_OFF); 1938 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n", 1939 rxfid); 1940 if (rxfid == 0) { 1941 schedule_work(&local->reset_queue); 1942 goto rx_dropped; 1943 } 1944 /* try to continue with the new rxfid value */ 1945 } 1946 #endif 1947 1948 spin_lock(&local->baplock); 1949 res = hfa384x_setup_bap(dev, BAP0, rxfid, 0); 1950 if (!res) 1951 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc)); 1952 1953 if (res) { 1954 spin_unlock(&local->baplock); 1955 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name, 1956 res); 1957 if (res == -ETIMEDOUT) { 1958 schedule_work(&local->reset_queue); 1959 } 1960 goto rx_dropped; 1961 } 1962 1963 len = le16_to_cpu(rxdesc.data_len); 1964 hdr_len = sizeof(rxdesc); 1965 status = le16_to_cpu(rxdesc.status); 1966 macport = (status >> 8) & 0x07; 1967 1968 /* Drop frames with too large reported payload length. Monitor mode 1969 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and 1970 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for 1971 * macport 7 */ 1972 if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) { 1973 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) { 1974 if (len >= (u16) -14) { 1975 hdr_len -= 65535 - len; 1976 hdr_len--; 1977 } 1978 len = 0; 1979 } else { 1980 spin_unlock(&local->baplock); 1981 printk(KERN_DEBUG "%s: Received frame with invalid " 1982 "length 0x%04x\n", dev->name, len); 1983 hostap_dump_rx_header(dev->name, &rxdesc); 1984 goto rx_dropped; 1985 } 1986 } 1987 1988 skb = dev_alloc_skb(len + hdr_len); 1989 if (!skb) { 1990 spin_unlock(&local->baplock); 1991 printk(KERN_DEBUG "%s: RX failed to allocate skb\n", 1992 dev->name); 1993 goto rx_dropped; 1994 } 1995 skb->dev = dev; 1996 skb_put_data(skb, &rxdesc, hdr_len); 1997 1998 if (len > 0) 1999 res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len); 2000 spin_unlock(&local->baplock); 2001 if (res) { 2002 printk(KERN_DEBUG "%s: RX failed to read " 2003 "frame data\n", dev->name); 2004 goto rx_dropped; 2005 } 2006 2007 skb_queue_tail(&local->rx_list, skb); 2008 tasklet_schedule(&local->rx_tasklet); 2009 2010 rx_exit: 2011 prism2_callback(local, PRISM2_CALLBACK_RX_END); 2012 if (!rx_pending) { 2013 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF); 2014 } 2015 2016 return; 2017 2018 rx_dropped: 2019 dev->stats.rx_dropped++; 2020 if (skb) 2021 dev_kfree_skb(skb); 2022 goto rx_exit; 2023 } 2024 2025 2026 /* Called only as a tasklet (software IRQ) */ 2027 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb) 2028 { 2029 struct hfa384x_rx_frame *rxdesc; 2030 struct net_device *dev = skb->dev; 2031 struct hostap_80211_rx_status stats; 2032 int hdrlen, rx_hdrlen; 2033 2034 rx_hdrlen = sizeof(*rxdesc); 2035 if (skb->len < sizeof(*rxdesc)) { 2036 /* Allow monitor mode to receive shorter frames */ 2037 if (local->iw_mode == IW_MODE_MONITOR && 2038 skb->len >= sizeof(*rxdesc) - 30) { 2039 rx_hdrlen = skb->len; 2040 } else { 2041 dev_kfree_skb(skb); 2042 return; 2043 } 2044 } 2045 2046 rxdesc = (struct hfa384x_rx_frame *) skb->data; 2047 2048 if (local->frame_dump & PRISM2_DUMP_RX_HDR && 2049 skb->len >= sizeof(*rxdesc)) 2050 hostap_dump_rx_header(dev->name, rxdesc); 2051 2052 if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR && 2053 (!local->monitor_allow_fcserr || 2054 local->iw_mode != IW_MODE_MONITOR)) 2055 goto drop; 2056 2057 if (skb->len > PRISM2_DATA_MAXLEN) { 2058 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n", 2059 dev->name, skb->len, PRISM2_DATA_MAXLEN); 2060 goto drop; 2061 } 2062 2063 stats.mac_time = le32_to_cpu(rxdesc->time); 2064 stats.signal = rxdesc->signal - local->rssi_to_dBm; 2065 stats.noise = rxdesc->silence - local->rssi_to_dBm; 2066 stats.rate = rxdesc->rate; 2067 2068 /* Convert Prism2 RX structure into IEEE 802.11 header */ 2069 hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control); 2070 if (hdrlen > rx_hdrlen) 2071 hdrlen = rx_hdrlen; 2072 2073 memmove(skb_pull(skb, rx_hdrlen - hdrlen), 2074 &rxdesc->frame_control, hdrlen); 2075 2076 hostap_80211_rx(dev, skb, &stats); 2077 return; 2078 2079 drop: 2080 dev_kfree_skb(skb); 2081 } 2082 2083 2084 /* Called only as a tasklet (software IRQ) */ 2085 static void hostap_rx_tasklet(struct tasklet_struct *t) 2086 { 2087 local_info_t *local = from_tasklet(local, t, rx_tasklet); 2088 struct sk_buff *skb; 2089 2090 while ((skb = skb_dequeue(&local->rx_list)) != NULL) 2091 hostap_rx_skb(local, skb); 2092 } 2093 2094 2095 /* Called only from hardware IRQ */ 2096 static void prism2_alloc_ev(struct net_device *dev) 2097 { 2098 struct hostap_interface *iface; 2099 local_info_t *local; 2100 int idx; 2101 u16 fid; 2102 2103 iface = netdev_priv(dev); 2104 local = iface->local; 2105 2106 fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF); 2107 2108 PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid); 2109 2110 spin_lock(&local->txfidlock); 2111 idx = local->next_alloc; 2112 2113 do { 2114 if (local->txfid[idx] == fid) { 2115 PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n", 2116 idx); 2117 2118 #ifndef final_version 2119 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) 2120 printk("Already released txfid found at idx " 2121 "%d\n", idx); 2122 if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED) 2123 printk("Already reserved txfid found at idx " 2124 "%d\n", idx); 2125 #endif 2126 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY; 2127 idx++; 2128 local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 : 2129 idx; 2130 2131 if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) && 2132 netif_queue_stopped(dev)) 2133 netif_wake_queue(dev); 2134 2135 spin_unlock(&local->txfidlock); 2136 return; 2137 } 2138 2139 idx++; 2140 if (idx >= PRISM2_TXFID_COUNT) 2141 idx = 0; 2142 } while (idx != local->next_alloc); 2143 2144 printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new " 2145 "read 0x%04x) for alloc event\n", dev->name, fid, 2146 HFA384X_INW(HFA384X_ALLOCFID_OFF)); 2147 printk(KERN_DEBUG "TXFIDs:"); 2148 for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++) 2149 printk(" %04x[%04x]", local->txfid[idx], 2150 local->intransmitfid[idx]); 2151 printk("\n"); 2152 spin_unlock(&local->txfidlock); 2153 2154 /* FIX: should probably schedule reset; reference to one txfid was lost 2155 * completely.. Bad things will happen if we run out of txfids 2156 * Actually, this will cause netdev watchdog to notice TX timeout and 2157 * then card reset after all txfids have been leaked. */ 2158 } 2159 2160 2161 /* Called only as a tasklet (software IRQ) */ 2162 static void hostap_tx_callback(local_info_t *local, 2163 struct hfa384x_tx_frame *txdesc, int ok, 2164 char *payload) 2165 { 2166 u16 sw_support, hdrlen, len; 2167 struct sk_buff *skb; 2168 struct hostap_tx_callback_info *cb; 2169 2170 /* Make sure that frame was from us. */ 2171 if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) { 2172 printk(KERN_DEBUG "%s: TX callback - foreign frame\n", 2173 local->dev->name); 2174 return; 2175 } 2176 2177 sw_support = le32_to_cpu(txdesc->sw_support); 2178 2179 spin_lock(&local->lock); 2180 cb = local->tx_callback; 2181 while (cb != NULL && cb->idx != sw_support) 2182 cb = cb->next; 2183 spin_unlock(&local->lock); 2184 2185 if (cb == NULL) { 2186 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n", 2187 local->dev->name, sw_support); 2188 return; 2189 } 2190 2191 hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control); 2192 len = le16_to_cpu(txdesc->data_len); 2193 skb = dev_alloc_skb(hdrlen + len); 2194 if (skb == NULL) { 2195 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate " 2196 "skb\n", local->dev->name); 2197 return; 2198 } 2199 2200 skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen); 2201 if (payload) 2202 skb_put_data(skb, payload, len); 2203 2204 skb->dev = local->dev; 2205 skb_reset_mac_header(skb); 2206 2207 cb->func(skb, ok, cb->data); 2208 } 2209 2210 2211 /* Called only as a tasklet (software IRQ) */ 2212 static int hostap_tx_compl_read(local_info_t *local, int error, 2213 struct hfa384x_tx_frame *txdesc, 2214 char **payload) 2215 { 2216 u16 fid, len; 2217 int res, ret = 0; 2218 struct net_device *dev = local->dev; 2219 2220 fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF); 2221 2222 PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error); 2223 2224 spin_lock(&local->baplock); 2225 res = hfa384x_setup_bap(dev, BAP0, fid, 0); 2226 if (!res) 2227 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc)); 2228 if (res) { 2229 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not " 2230 "read txdesc\n", dev->name, error, fid); 2231 if (res == -ETIMEDOUT) { 2232 schedule_work(&local->reset_queue); 2233 } 2234 ret = -1; 2235 goto fail; 2236 } 2237 if (txdesc->sw_support) { 2238 len = le16_to_cpu(txdesc->data_len); 2239 if (len < PRISM2_DATA_MAXLEN) { 2240 *payload = kmalloc(len, GFP_ATOMIC); 2241 if (*payload == NULL || 2242 hfa384x_from_bap(dev, BAP0, *payload, len)) { 2243 PDEBUG(DEBUG_EXTRA, "%s: could not read TX " 2244 "frame payload\n", dev->name); 2245 kfree(*payload); 2246 *payload = NULL; 2247 ret = -1; 2248 goto fail; 2249 } 2250 } 2251 } 2252 2253 fail: 2254 spin_unlock(&local->baplock); 2255 2256 return ret; 2257 } 2258 2259 2260 /* Called only as a tasklet (software IRQ) */ 2261 static void prism2_tx_ev(local_info_t *local) 2262 { 2263 struct net_device *dev = local->dev; 2264 char *payload = NULL; 2265 struct hfa384x_tx_frame txdesc; 2266 2267 if (hostap_tx_compl_read(local, 0, &txdesc, &payload)) 2268 goto fail; 2269 2270 if (local->frame_dump & PRISM2_DUMP_TX_HDR) { 2271 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x " 2272 "retry_count=%d tx_rate=%d seq_ctrl=%d " 2273 "duration_id=%d\n", 2274 dev->name, le16_to_cpu(txdesc.status), 2275 txdesc.retry_count, txdesc.tx_rate, 2276 le16_to_cpu(txdesc.seq_ctrl), 2277 le16_to_cpu(txdesc.duration_id)); 2278 } 2279 2280 if (txdesc.sw_support) 2281 hostap_tx_callback(local, &txdesc, 1, payload); 2282 kfree(payload); 2283 2284 fail: 2285 HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF); 2286 } 2287 2288 2289 /* Called only as a tasklet (software IRQ) */ 2290 static void hostap_sta_tx_exc_tasklet(struct tasklet_struct *t) 2291 { 2292 local_info_t *local = from_tasklet(local, t, sta_tx_exc_tasklet); 2293 struct sk_buff *skb; 2294 2295 while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) { 2296 struct hfa384x_tx_frame *txdesc = 2297 (struct hfa384x_tx_frame *) skb->data; 2298 2299 if (skb->len >= sizeof(*txdesc)) { 2300 /* Convert Prism2 RX structure into IEEE 802.11 header 2301 */ 2302 int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control); 2303 memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen), 2304 &txdesc->frame_control, hdrlen); 2305 2306 hostap_handle_sta_tx_exc(local, skb); 2307 } 2308 dev_kfree_skb(skb); 2309 } 2310 } 2311 2312 2313 /* Called only as a tasklet (software IRQ) */ 2314 static void prism2_txexc(local_info_t *local) 2315 { 2316 struct net_device *dev = local->dev; 2317 u16 status, fc; 2318 int show_dump, res; 2319 char *payload = NULL; 2320 struct hfa384x_tx_frame txdesc; 2321 2322 show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR; 2323 dev->stats.tx_errors++; 2324 2325 res = hostap_tx_compl_read(local, 1, &txdesc, &payload); 2326 HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF); 2327 if (res) 2328 return; 2329 2330 status = le16_to_cpu(txdesc.status); 2331 2332 /* We produce a TXDROP event only for retry or lifetime 2333 * exceeded, because that's the only status that really mean 2334 * that this particular node went away. 2335 * Other errors means that *we* screwed up. - Jean II */ 2336 if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR)) 2337 { 2338 union iwreq_data wrqu; 2339 2340 /* Copy 802.11 dest address. */ 2341 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN); 2342 wrqu.addr.sa_family = ARPHRD_ETHER; 2343 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL); 2344 } else 2345 show_dump = 1; 2346 2347 if (local->iw_mode == IW_MODE_MASTER || 2348 local->iw_mode == IW_MODE_REPEAT || 2349 local->wds_type & HOSTAP_WDS_AP_CLIENT) { 2350 struct sk_buff *skb; 2351 skb = dev_alloc_skb(sizeof(txdesc)); 2352 if (skb) { 2353 skb_put_data(skb, &txdesc, sizeof(txdesc)); 2354 skb_queue_tail(&local->sta_tx_exc_list, skb); 2355 tasklet_schedule(&local->sta_tx_exc_tasklet); 2356 } 2357 } 2358 2359 if (txdesc.sw_support) 2360 hostap_tx_callback(local, &txdesc, 0, payload); 2361 kfree(payload); 2362 2363 if (!show_dump) 2364 return; 2365 2366 PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)" 2367 " tx_control=%04x\n", 2368 dev->name, status, 2369 status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "", 2370 status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "", 2371 status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "", 2372 status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "", 2373 le16_to_cpu(txdesc.tx_control)); 2374 2375 fc = le16_to_cpu(txdesc.frame_control); 2376 PDEBUG(DEBUG_EXTRA, " retry_count=%d tx_rate=%d fc=0x%04x " 2377 "(%s%s%s::%d%s%s)\n", 2378 txdesc.retry_count, txdesc.tx_rate, fc, 2379 ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "", 2380 ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "", 2381 ieee80211_is_data(txdesc.frame_control) ? "Data" : "", 2382 (fc & IEEE80211_FCTL_STYPE) >> 4, 2383 ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "", 2384 ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : ""); 2385 PDEBUG(DEBUG_EXTRA, " A1=%pM A2=%pM A3=%pM A4=%pM\n", 2386 txdesc.addr1, txdesc.addr2, 2387 txdesc.addr3, txdesc.addr4); 2388 } 2389 2390 2391 /* Called only as a tasklet (software IRQ) */ 2392 static void hostap_info_tasklet(struct tasklet_struct *t) 2393 { 2394 local_info_t *local = from_tasklet(local, t, info_tasklet); 2395 struct sk_buff *skb; 2396 2397 while ((skb = skb_dequeue(&local->info_list)) != NULL) { 2398 hostap_info_process(local, skb); 2399 dev_kfree_skb(skb); 2400 } 2401 } 2402 2403 2404 /* Called only as a tasklet (software IRQ) */ 2405 static void prism2_info(local_info_t *local) 2406 { 2407 struct net_device *dev = local->dev; 2408 u16 fid; 2409 int res, left; 2410 struct hfa384x_info_frame info; 2411 struct sk_buff *skb; 2412 2413 fid = HFA384X_INW(HFA384X_INFOFID_OFF); 2414 2415 spin_lock(&local->baplock); 2416 res = hfa384x_setup_bap(dev, BAP0, fid, 0); 2417 if (!res) 2418 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info)); 2419 if (res) { 2420 spin_unlock(&local->baplock); 2421 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n", 2422 fid); 2423 if (res == -ETIMEDOUT) { 2424 schedule_work(&local->reset_queue); 2425 } 2426 goto out; 2427 } 2428 2429 left = (le16_to_cpu(info.len) - 1) * 2; 2430 2431 if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) { 2432 /* data register seems to give 0x8000 in some error cases even 2433 * though busy bit is not set in offset register; 2434 * in addition, length must be at least 1 due to type field */ 2435 spin_unlock(&local->baplock); 2436 printk(KERN_DEBUG "%s: Received info frame with invalid " 2437 "length 0x%04x (type 0x%04x)\n", dev->name, 2438 le16_to_cpu(info.len), le16_to_cpu(info.type)); 2439 goto out; 2440 } 2441 2442 skb = dev_alloc_skb(sizeof(info) + left); 2443 if (skb == NULL) { 2444 spin_unlock(&local->baplock); 2445 printk(KERN_DEBUG "%s: Could not allocate skb for info " 2446 "frame\n", dev->name); 2447 goto out; 2448 } 2449 2450 skb_put_data(skb, &info, sizeof(info)); 2451 if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left)) 2452 { 2453 spin_unlock(&local->baplock); 2454 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, " 2455 "len=0x%04x, type=0x%04x\n", dev->name, fid, 2456 le16_to_cpu(info.len), le16_to_cpu(info.type)); 2457 dev_kfree_skb(skb); 2458 goto out; 2459 } 2460 spin_unlock(&local->baplock); 2461 2462 skb_queue_tail(&local->info_list, skb); 2463 tasklet_schedule(&local->info_tasklet); 2464 2465 out: 2466 HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF); 2467 } 2468 2469 2470 /* Called only as a tasklet (software IRQ) */ 2471 static void hostap_bap_tasklet(struct tasklet_struct *t) 2472 { 2473 local_info_t *local = from_tasklet(local, t, bap_tasklet); 2474 struct net_device *dev = local->dev; 2475 u16 ev; 2476 int frames = 30; 2477 2478 if (local->func->card_present && !local->func->card_present(local)) 2479 return; 2480 2481 set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits); 2482 2483 /* Process all pending BAP events without generating new interrupts 2484 * for them */ 2485 while (frames-- > 0) { 2486 ev = HFA384X_INW(HFA384X_EVSTAT_OFF); 2487 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS)) 2488 break; 2489 if (ev & HFA384X_EV_RX) 2490 prism2_rx(local); 2491 if (ev & HFA384X_EV_INFO) 2492 prism2_info(local); 2493 if (ev & HFA384X_EV_TX) 2494 prism2_tx_ev(local); 2495 if (ev & HFA384X_EV_TXEXC) 2496 prism2_txexc(local); 2497 } 2498 2499 set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits); 2500 clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits); 2501 2502 /* Enable interrupts for new BAP events */ 2503 hfa384x_events_all(dev); 2504 clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits); 2505 } 2506 2507 2508 /* Called only from hardware IRQ */ 2509 static void prism2_infdrop(struct net_device *dev) 2510 { 2511 static unsigned long last_inquire = 0; 2512 2513 PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name); 2514 2515 /* some firmware versions seem to get stuck with 2516 * full CommTallies in high traffic load cases; every 2517 * packet will then cause INFDROP event and CommTallies 2518 * info frame will not be sent automatically. Try to 2519 * get out of this state by inquiring CommTallies. */ 2520 if (!last_inquire || time_after(jiffies, last_inquire + HZ)) { 2521 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE, 2522 HFA384X_INFO_COMMTALLIES, NULL, 0); 2523 last_inquire = jiffies; 2524 } 2525 } 2526 2527 2528 /* Called only from hardware IRQ */ 2529 static void prism2_ev_tick(struct net_device *dev) 2530 { 2531 struct hostap_interface *iface; 2532 local_info_t *local; 2533 u16 evstat, inten; 2534 static int prev_stuck = 0; 2535 2536 iface = netdev_priv(dev); 2537 local = iface->local; 2538 2539 if (time_after(jiffies, local->last_tick_timer + 5 * HZ) && 2540 local->last_tick_timer) { 2541 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF); 2542 inten = HFA384X_INW(HFA384X_INTEN_OFF); 2543 if (!prev_stuck) { 2544 printk(KERN_INFO "%s: SW TICK stuck? " 2545 "bits=0x%lx EvStat=%04x IntEn=%04x\n", 2546 dev->name, local->bits, evstat, inten); 2547 } 2548 local->sw_tick_stuck++; 2549 if ((evstat & HFA384X_BAP0_EVENTS) && 2550 (inten & HFA384X_BAP0_EVENTS)) { 2551 printk(KERN_INFO "%s: trying to recover from IRQ " 2552 "hang\n", dev->name); 2553 hfa384x_events_no_bap0(dev); 2554 } 2555 prev_stuck = 1; 2556 } else 2557 prev_stuck = 0; 2558 } 2559 2560 2561 /* Called only from hardware IRQ */ 2562 static void prism2_check_magic(local_info_t *local) 2563 { 2564 /* at least PCI Prism2.5 with bus mastering seems to sometimes 2565 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the 2566 * register once or twice seems to get the correct value.. PCI cards 2567 * cannot anyway be removed during normal operation, so there is not 2568 * really any need for this verification with them. */ 2569 2570 #ifndef PRISM2_PCI 2571 #ifndef final_version 2572 static unsigned long last_magic_err = 0; 2573 struct net_device *dev = local->dev; 2574 2575 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) { 2576 if (!local->hw_ready) 2577 return; 2578 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF); 2579 if (time_after(jiffies, last_magic_err + 10 * HZ)) { 2580 printk("%s: Interrupt, but SWSUPPORT0 does not match: " 2581 "%04X != %04X - card removed?\n", dev->name, 2582 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), 2583 HFA384X_MAGIC); 2584 last_magic_err = jiffies; 2585 } else if (net_ratelimit()) { 2586 printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x " 2587 "MAGIC=%04x\n", dev->name, 2588 HFA384X_INW(HFA384X_SWSUPPORT0_OFF), 2589 HFA384X_MAGIC); 2590 } 2591 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff) 2592 schedule_work(&local->reset_queue); 2593 return; 2594 } 2595 #endif /* final_version */ 2596 #endif /* !PRISM2_PCI */ 2597 } 2598 2599 2600 /* Called only from hardware IRQ */ 2601 static irqreturn_t prism2_interrupt(int irq, void *dev_id) 2602 { 2603 struct net_device *dev = dev_id; 2604 struct hostap_interface *iface; 2605 local_info_t *local; 2606 int events = 0; 2607 u16 ev; 2608 2609 iface = netdev_priv(dev); 2610 local = iface->local; 2611 2612 /* Detect early interrupt before driver is fully configured */ 2613 spin_lock(&local->irq_init_lock); 2614 if (!dev->base_addr) { 2615 if (net_ratelimit()) { 2616 printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n", 2617 dev->name); 2618 } 2619 spin_unlock(&local->irq_init_lock); 2620 return IRQ_HANDLED; 2621 } 2622 spin_unlock(&local->irq_init_lock); 2623 2624 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0); 2625 2626 if (local->func->card_present && !local->func->card_present(local)) { 2627 if (net_ratelimit()) { 2628 printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n", 2629 dev->name); 2630 } 2631 return IRQ_HANDLED; 2632 } 2633 2634 prism2_check_magic(local); 2635 2636 for (;;) { 2637 ev = HFA384X_INW(HFA384X_EVSTAT_OFF); 2638 if (ev == 0xffff) { 2639 if (local->shutdown) 2640 return IRQ_HANDLED; 2641 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF); 2642 printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n", 2643 dev->name); 2644 return IRQ_HANDLED; 2645 } 2646 2647 ev &= HFA384X_INW(HFA384X_INTEN_OFF); 2648 if (ev == 0) 2649 break; 2650 2651 if (ev & HFA384X_EV_CMD) { 2652 prism2_cmd_ev(dev); 2653 } 2654 2655 /* Above events are needed even before hw is ready, but other 2656 * events should be skipped during initialization. This may 2657 * change for AllocEv if allocate_fid is implemented without 2658 * busy waiting. */ 2659 if (!local->hw_ready || local->hw_resetting || 2660 !local->dev_enabled) { 2661 ev = HFA384X_INW(HFA384X_EVSTAT_OFF); 2662 if (ev & HFA384X_EV_CMD) 2663 goto next_event; 2664 if ((ev & HFA384X_EVENT_MASK) == 0) 2665 return IRQ_HANDLED; 2666 if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) && 2667 net_ratelimit()) { 2668 printk(KERN_DEBUG "%s: prism2_interrupt: hw " 2669 "not ready; skipping events 0x%04x " 2670 "(IntEn=0x%04x)%s%s%s\n", 2671 dev->name, ev, 2672 HFA384X_INW(HFA384X_INTEN_OFF), 2673 !local->hw_ready ? " (!hw_ready)" : "", 2674 local->hw_resetting ? 2675 " (hw_resetting)" : "", 2676 !local->dev_enabled ? 2677 " (!dev_enabled)" : ""); 2678 } 2679 HFA384X_OUTW(ev, HFA384X_EVACK_OFF); 2680 return IRQ_HANDLED; 2681 } 2682 2683 if (ev & HFA384X_EV_TICK) { 2684 prism2_ev_tick(dev); 2685 HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF); 2686 } 2687 2688 if (ev & HFA384X_EV_ALLOC) { 2689 prism2_alloc_ev(dev); 2690 HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF); 2691 } 2692 2693 /* Reading data from the card is quite time consuming, so do it 2694 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed 2695 * and unmasked after needed data has been read completely. */ 2696 if (ev & HFA384X_BAP0_EVENTS) { 2697 hfa384x_events_no_bap0(dev); 2698 tasklet_schedule(&local->bap_tasklet); 2699 } 2700 2701 #ifndef final_version 2702 if (ev & HFA384X_EV_WTERR) { 2703 PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name); 2704 HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF); 2705 } 2706 #endif /* final_version */ 2707 2708 if (ev & HFA384X_EV_INFDROP) { 2709 prism2_infdrop(dev); 2710 HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF); 2711 } 2712 2713 next_event: 2714 events++; 2715 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) { 2716 PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events " 2717 "(EvStat=0x%04x)\n", 2718 PRISM2_MAX_INTERRUPT_EVENTS, 2719 HFA384X_INW(HFA384X_EVSTAT_OFF)); 2720 break; 2721 } 2722 } 2723 prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1); 2724 return IRQ_RETVAL(events); 2725 } 2726 2727 2728 static void prism2_check_sta_fw_version(local_info_t *local) 2729 { 2730 struct hfa384x_comp_ident comp; 2731 int id, variant, major, minor; 2732 2733 if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID, 2734 &comp, sizeof(comp), 1) < 0) 2735 return; 2736 2737 local->fw_ap = 0; 2738 id = le16_to_cpu(comp.id); 2739 if (id != HFA384X_COMP_ID_STA) { 2740 if (id == HFA384X_COMP_ID_FW_AP) 2741 local->fw_ap = 1; 2742 return; 2743 } 2744 2745 major = __le16_to_cpu(comp.major); 2746 minor = __le16_to_cpu(comp.minor); 2747 variant = __le16_to_cpu(comp.variant); 2748 local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant); 2749 2750 /* Station firmware versions before 1.4.x seem to have a bug in 2751 * firmware-based WEP encryption when using Host AP mode, so use 2752 * host_encrypt as a default for them. Firmware version 1.4.9 is the 2753 * first one that has been seen to produce correct encryption, but the 2754 * bug might be fixed before that (although, at least 1.4.2 is broken). 2755 */ 2756 local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9); 2757 2758 if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt && 2759 !local->fw_encrypt_ok) { 2760 printk(KERN_DEBUG "%s: defaulting to host-based encryption as " 2761 "a workaround for firmware bug in Host AP mode WEP\n", 2762 local->dev->name); 2763 local->host_encrypt = 1; 2764 } 2765 2766 /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken 2767 * in station firmware versions before 1.5.x. With these versions, the 2768 * driver uses a workaround with bogus frame format (4th address after 2769 * the payload). This is not compatible with other AP devices. Since 2770 * the firmware bug is fixed in the latest station firmware versions, 2771 * automatically enable standard compliant mode for cards using station 2772 * firmware version 1.5.0 or newer. */ 2773 if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0)) 2774 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME; 2775 else { 2776 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a " 2777 "workaround for firmware bug in Host AP mode WDS\n", 2778 local->dev->name); 2779 } 2780 2781 hostap_check_sta_fw_version(local->ap, local->sta_fw_ver); 2782 } 2783 2784 2785 static void hostap_passive_scan(struct timer_list *t) 2786 { 2787 local_info_t *local = from_timer(local, t, passive_scan_timer); 2788 struct net_device *dev = local->dev; 2789 u16 chan; 2790 2791 if (local->passive_scan_interval <= 0) 2792 return; 2793 2794 if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) { 2795 int max_tries = 16; 2796 2797 /* Even though host system does not really know when the WLAN 2798 * MAC is sending frames, try to avoid changing channels for 2799 * passive scanning when a host-generated frame is being 2800 * transmitted */ 2801 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) { 2802 printk(KERN_DEBUG "%s: passive scan detected pending " 2803 "TX - delaying\n", dev->name); 2804 local->passive_scan_timer.expires = jiffies + HZ / 10; 2805 add_timer(&local->passive_scan_timer); 2806 return; 2807 } 2808 2809 do { 2810 local->passive_scan_channel++; 2811 if (local->passive_scan_channel > 14) 2812 local->passive_scan_channel = 1; 2813 max_tries--; 2814 } while (!(local->channel_mask & 2815 (1 << (local->passive_scan_channel - 1))) && 2816 max_tries > 0); 2817 2818 if (max_tries == 0) { 2819 printk(KERN_INFO "%s: no allowed passive scan channels" 2820 " found\n", dev->name); 2821 return; 2822 } 2823 2824 printk(KERN_DEBUG "%s: passive scan channel %d\n", 2825 dev->name, local->passive_scan_channel); 2826 chan = local->passive_scan_channel; 2827 local->passive_scan_state = PASSIVE_SCAN_WAIT; 2828 local->passive_scan_timer.expires = jiffies + HZ / 10; 2829 } else { 2830 chan = local->channel; 2831 local->passive_scan_state = PASSIVE_SCAN_LISTEN; 2832 local->passive_scan_timer.expires = jiffies + 2833 local->passive_scan_interval * HZ; 2834 } 2835 2836 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST | 2837 (HFA384X_TEST_CHANGE_CHANNEL << 8), 2838 chan, NULL, 0)) 2839 printk(KERN_ERR "%s: passive scan channel set %d " 2840 "failed\n", dev->name, chan); 2841 2842 add_timer(&local->passive_scan_timer); 2843 } 2844 2845 2846 /* Called only as a scheduled task when communications quality values should 2847 * be updated. */ 2848 static void handle_comms_qual_update(struct work_struct *work) 2849 { 2850 local_info_t *local = 2851 container_of(work, local_info_t, comms_qual_update); 2852 prism2_update_comms_qual(local->dev); 2853 } 2854 2855 2856 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is 2857 * used to monitor that local->last_tick_timer is being updated. If not, 2858 * interrupt busy-loop is assumed and driver tries to recover by masking out 2859 * some events. */ 2860 static void hostap_tick_timer(struct timer_list *t) 2861 { 2862 static unsigned long last_inquire = 0; 2863 local_info_t *local = from_timer(local, t, tick_timer); 2864 local->last_tick_timer = jiffies; 2865 2866 /* Inquire CommTallies every 10 seconds to keep the statistics updated 2867 * more often during low load and when using 32-bit tallies. */ 2868 if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) && 2869 !local->hw_downloading && local->hw_ready && 2870 !local->hw_resetting && local->dev_enabled) { 2871 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE, 2872 HFA384X_INFO_COMMTALLIES, NULL, 0); 2873 last_inquire = jiffies; 2874 } 2875 2876 if ((local->last_comms_qual_update == 0 || 2877 time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) && 2878 (local->iw_mode == IW_MODE_INFRA || 2879 local->iw_mode == IW_MODE_ADHOC)) { 2880 schedule_work(&local->comms_qual_update); 2881 } 2882 2883 local->tick_timer.expires = jiffies + 2 * HZ; 2884 add_timer(&local->tick_timer); 2885 } 2886 2887 2888 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS) 2889 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg) 2890 { 2891 return HFA384X_INW(reg); 2892 } 2893 2894 static int prism2_registers_proc_show(struct seq_file *m, void *v) 2895 { 2896 local_info_t *local = m->private; 2897 2898 #define SHOW_REG(n) \ 2899 seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF)) 2900 2901 SHOW_REG(CMD); 2902 SHOW_REG(PARAM0); 2903 SHOW_REG(PARAM1); 2904 SHOW_REG(PARAM2); 2905 SHOW_REG(STATUS); 2906 SHOW_REG(RESP0); 2907 SHOW_REG(RESP1); 2908 SHOW_REG(RESP2); 2909 SHOW_REG(INFOFID); 2910 SHOW_REG(CONTROL); 2911 SHOW_REG(SELECT0); 2912 SHOW_REG(SELECT1); 2913 SHOW_REG(OFFSET0); 2914 SHOW_REG(OFFSET1); 2915 SHOW_REG(RXFID); 2916 SHOW_REG(ALLOCFID); 2917 SHOW_REG(TXCOMPLFID); 2918 SHOW_REG(SWSUPPORT0); 2919 SHOW_REG(SWSUPPORT1); 2920 SHOW_REG(SWSUPPORT2); 2921 SHOW_REG(EVSTAT); 2922 SHOW_REG(INTEN); 2923 SHOW_REG(EVACK); 2924 /* Do not read data registers, because they change the state of the 2925 * MAC (offset += 2) */ 2926 /* SHOW_REG(DATA0); */ 2927 /* SHOW_REG(DATA1); */ 2928 SHOW_REG(AUXPAGE); 2929 SHOW_REG(AUXOFFSET); 2930 /* SHOW_REG(AUXDATA); */ 2931 #ifdef PRISM2_PCI 2932 SHOW_REG(PCICOR); 2933 SHOW_REG(PCIHCR); 2934 SHOW_REG(PCI_M0_ADDRH); 2935 SHOW_REG(PCI_M0_ADDRL); 2936 SHOW_REG(PCI_M0_LEN); 2937 SHOW_REG(PCI_M0_CTL); 2938 SHOW_REG(PCI_STATUS); 2939 SHOW_REG(PCI_M1_ADDRH); 2940 SHOW_REG(PCI_M1_ADDRL); 2941 SHOW_REG(PCI_M1_LEN); 2942 SHOW_REG(PCI_M1_CTL); 2943 #endif /* PRISM2_PCI */ 2944 2945 return 0; 2946 } 2947 #endif 2948 2949 struct set_tim_data { 2950 struct list_head list; 2951 int aid; 2952 int set; 2953 }; 2954 2955 static int prism2_set_tim(struct net_device *dev, int aid, int set) 2956 { 2957 struct list_head *ptr; 2958 struct set_tim_data *new_entry; 2959 struct hostap_interface *iface; 2960 local_info_t *local; 2961 2962 iface = netdev_priv(dev); 2963 local = iface->local; 2964 2965 new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC); 2966 if (new_entry == NULL) 2967 return -ENOMEM; 2968 2969 new_entry->aid = aid; 2970 new_entry->set = set; 2971 2972 spin_lock_bh(&local->set_tim_lock); 2973 list_for_each(ptr, &local->set_tim_list) { 2974 struct set_tim_data *entry = 2975 list_entry(ptr, struct set_tim_data, list); 2976 if (entry->aid == aid) { 2977 PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d " 2978 "set=%d ==> %d\n", 2979 local->dev->name, aid, entry->set, set); 2980 entry->set = set; 2981 kfree(new_entry); 2982 new_entry = NULL; 2983 break; 2984 } 2985 } 2986 if (new_entry) 2987 list_add_tail(&new_entry->list, &local->set_tim_list); 2988 spin_unlock_bh(&local->set_tim_lock); 2989 2990 schedule_work(&local->set_tim_queue); 2991 2992 return 0; 2993 } 2994 2995 2996 static void handle_set_tim_queue(struct work_struct *work) 2997 { 2998 local_info_t *local = container_of(work, local_info_t, set_tim_queue); 2999 struct set_tim_data *entry; 3000 u16 val; 3001 3002 for (;;) { 3003 entry = NULL; 3004 spin_lock_bh(&local->set_tim_lock); 3005 if (!list_empty(&local->set_tim_list)) { 3006 entry = list_entry(local->set_tim_list.next, 3007 struct set_tim_data, list); 3008 list_del(&entry->list); 3009 } 3010 spin_unlock_bh(&local->set_tim_lock); 3011 if (!entry) 3012 break; 3013 3014 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n", 3015 local->dev->name, entry->aid, entry->set); 3016 3017 val = entry->aid; 3018 if (entry->set) 3019 val |= 0x8000; 3020 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) { 3021 printk(KERN_DEBUG "%s: set_tim failed (aid=%d " 3022 "set=%d)\n", 3023 local->dev->name, entry->aid, entry->set); 3024 } 3025 3026 kfree(entry); 3027 } 3028 } 3029 3030 3031 static void prism2_clear_set_tim_queue(local_info_t *local) 3032 { 3033 struct list_head *ptr, *n; 3034 3035 list_for_each_safe(ptr, n, &local->set_tim_list) { 3036 struct set_tim_data *entry; 3037 entry = list_entry(ptr, struct set_tim_data, list); 3038 list_del(&entry->list); 3039 kfree(entry); 3040 } 3041 } 3042 3043 3044 /* 3045 * HostAP uses two layers of net devices, where the inner 3046 * layer gets called all the time from the outer layer. 3047 * This is a natural nesting, which needs a split lock type. 3048 */ 3049 static struct lock_class_key hostap_netdev_xmit_lock_key; 3050 static struct lock_class_key hostap_netdev_addr_lock_key; 3051 3052 static void prism2_set_lockdep_class_one(struct net_device *dev, 3053 struct netdev_queue *txq, 3054 void *_unused) 3055 { 3056 lockdep_set_class(&txq->_xmit_lock, 3057 &hostap_netdev_xmit_lock_key); 3058 } 3059 3060 static void prism2_set_lockdep_class(struct net_device *dev) 3061 { 3062 lockdep_set_class(&dev->addr_list_lock, 3063 &hostap_netdev_addr_lock_key); 3064 netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL); 3065 } 3066 3067 static struct net_device * 3068 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx, 3069 struct device *sdev) 3070 { 3071 struct net_device *dev; 3072 struct hostap_interface *iface; 3073 struct local_info *local; 3074 int len, i, ret; 3075 3076 if (funcs == NULL) 3077 return NULL; 3078 3079 len = strlen(dev_template); 3080 if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) { 3081 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n", 3082 dev_template); 3083 return NULL; 3084 } 3085 3086 len = sizeof(struct hostap_interface) + 3087 3 + sizeof(struct local_info) + 3088 3 + sizeof(struct ap_data); 3089 3090 dev = alloc_etherdev(len); 3091 if (dev == NULL) 3092 return NULL; 3093 3094 iface = netdev_priv(dev); 3095 local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3); 3096 local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3); 3097 local->dev = iface->dev = dev; 3098 iface->local = local; 3099 iface->type = HOSTAP_INTERFACE_MASTER; 3100 INIT_LIST_HEAD(&local->hostap_interfaces); 3101 3102 local->hw_module = THIS_MODULE; 3103 3104 #ifdef PRISM2_IO_DEBUG 3105 local->io_debug_enabled = 1; 3106 #endif /* PRISM2_IO_DEBUG */ 3107 3108 local->func = funcs; 3109 local->func->cmd = hfa384x_cmd; 3110 local->func->read_regs = hfa384x_read_regs; 3111 local->func->get_rid = hfa384x_get_rid; 3112 local->func->set_rid = hfa384x_set_rid; 3113 local->func->hw_enable = prism2_hw_enable; 3114 local->func->hw_config = prism2_hw_config; 3115 local->func->hw_reset = prism2_hw_reset; 3116 local->func->hw_shutdown = prism2_hw_shutdown; 3117 local->func->reset_port = prism2_reset_port; 3118 local->func->schedule_reset = prism2_schedule_reset; 3119 #ifdef PRISM2_DOWNLOAD_SUPPORT 3120 local->func->read_aux_proc_ops = &prism2_download_aux_dump_proc_ops; 3121 local->func->download = prism2_download; 3122 #endif /* PRISM2_DOWNLOAD_SUPPORT */ 3123 local->func->tx = prism2_tx_80211; 3124 local->func->set_tim = prism2_set_tim; 3125 local->func->need_tx_headroom = 0; /* no need to add txdesc in 3126 * skb->data (FIX: maybe for DMA bus 3127 * mastering? */ 3128 3129 local->mtu = mtu; 3130 3131 rwlock_init(&local->iface_lock); 3132 spin_lock_init(&local->txfidlock); 3133 spin_lock_init(&local->cmdlock); 3134 spin_lock_init(&local->baplock); 3135 spin_lock_init(&local->lock); 3136 spin_lock_init(&local->irq_init_lock); 3137 mutex_init(&local->rid_bap_mtx); 3138 3139 if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES) 3140 card_idx = 0; 3141 local->card_idx = card_idx; 3142 3143 len = strlen(essid); 3144 memcpy(local->essid, essid, 3145 len > MAX_SSID_LEN ? MAX_SSID_LEN : len); 3146 local->essid[MAX_SSID_LEN] = '\0'; 3147 i = GET_INT_PARM(iw_mode, card_idx); 3148 if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) || 3149 i == IW_MODE_MONITOR) { 3150 local->iw_mode = i; 3151 } else { 3152 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using " 3153 "IW_MODE_MASTER\n", i); 3154 local->iw_mode = IW_MODE_MASTER; 3155 } 3156 local->channel = GET_INT_PARM(channel, card_idx); 3157 local->beacon_int = GET_INT_PARM(beacon_int, card_idx); 3158 local->dtim_period = GET_INT_PARM(dtim_period, card_idx); 3159 local->wds_max_connections = 16; 3160 local->tx_control = HFA384X_TX_CTRL_FLAGS; 3161 local->manual_retry_count = -1; 3162 local->rts_threshold = 2347; 3163 local->fragm_threshold = 2346; 3164 local->rssi_to_dBm = 100; /* default; to be overriden by 3165 * cnfDbmAdjust, if available */ 3166 local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY; 3167 local->sram_type = -1; 3168 local->scan_channel_mask = 0xffff; 3169 local->monitor_type = PRISM2_MONITOR_RADIOTAP; 3170 3171 /* Initialize task queue structures */ 3172 INIT_WORK(&local->reset_queue, handle_reset_queue); 3173 INIT_WORK(&local->set_multicast_list_queue, 3174 hostap_set_multicast_list_queue); 3175 3176 INIT_WORK(&local->set_tim_queue, handle_set_tim_queue); 3177 INIT_LIST_HEAD(&local->set_tim_list); 3178 spin_lock_init(&local->set_tim_lock); 3179 3180 INIT_WORK(&local->comms_qual_update, handle_comms_qual_update); 3181 3182 /* Initialize tasklets for handling hardware IRQ related operations 3183 * outside hw IRQ handler */ 3184 #define HOSTAP_TASKLET_INIT(q, f, d) \ 3185 do { memset((q), 0, sizeof(*(q))); (q)->func = (void(*)(unsigned long))(f); } \ 3186 while (0) 3187 HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet, 3188 (unsigned long) local); 3189 3190 HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet, 3191 (unsigned long) local); 3192 hostap_info_init(local); 3193 3194 HOSTAP_TASKLET_INIT(&local->rx_tasklet, 3195 hostap_rx_tasklet, (unsigned long) local); 3196 skb_queue_head_init(&local->rx_list); 3197 3198 HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet, 3199 hostap_sta_tx_exc_tasklet, (unsigned long) local); 3200 skb_queue_head_init(&local->sta_tx_exc_list); 3201 3202 INIT_LIST_HEAD(&local->cmd_queue); 3203 init_waitqueue_head(&local->hostscan_wq); 3204 3205 lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock); 3206 3207 timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0); 3208 timer_setup(&local->tick_timer, hostap_tick_timer, 0); 3209 local->tick_timer.expires = jiffies + 2 * HZ; 3210 add_timer(&local->tick_timer); 3211 3212 INIT_LIST_HEAD(&local->bss_list); 3213 3214 hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER); 3215 3216 dev->type = ARPHRD_IEEE80211; 3217 dev->header_ops = &hostap_80211_ops; 3218 3219 rtnl_lock(); 3220 ret = dev_alloc_name(dev, "wifi%d"); 3221 SET_NETDEV_DEV(dev, sdev); 3222 if (ret >= 0) 3223 ret = register_netdevice(dev); 3224 3225 prism2_set_lockdep_class(dev); 3226 rtnl_unlock(); 3227 if (ret < 0) { 3228 printk(KERN_WARNING "%s: register netdevice failed!\n", 3229 dev_info); 3230 goto fail; 3231 } 3232 printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name); 3233 3234 hostap_init_data(local); 3235 return dev; 3236 3237 fail: 3238 free_netdev(dev); 3239 return NULL; 3240 } 3241 3242 3243 static int hostap_hw_ready(struct net_device *dev) 3244 { 3245 struct hostap_interface *iface; 3246 struct local_info *local; 3247 3248 iface = netdev_priv(dev); 3249 local = iface->local; 3250 local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0, 3251 "", dev_template); 3252 3253 if (local->ddev) { 3254 if (local->iw_mode == IW_MODE_INFRA || 3255 local->iw_mode == IW_MODE_ADHOC) { 3256 netif_carrier_off(local->dev); 3257 netif_carrier_off(local->ddev); 3258 } 3259 hostap_init_proc(local); 3260 #ifndef PRISM2_NO_PROCFS_DEBUG 3261 proc_create_single_data("registers", 0, local->proc, 3262 prism2_registers_proc_show, local); 3263 #endif /* PRISM2_NO_PROCFS_DEBUG */ 3264 hostap_init_ap_proc(local); 3265 return 0; 3266 } 3267 3268 return -1; 3269 } 3270 3271 3272 static void prism2_free_local_data(struct net_device *dev) 3273 { 3274 struct hostap_tx_callback_info *tx_cb, *tx_cb_prev; 3275 int i; 3276 struct hostap_interface *iface; 3277 struct local_info *local; 3278 struct list_head *ptr, *n; 3279 3280 if (dev == NULL) 3281 return; 3282 3283 iface = netdev_priv(dev); 3284 local = iface->local; 3285 3286 /* Unregister all netdevs before freeing local data. */ 3287 list_for_each_safe(ptr, n, &local->hostap_interfaces) { 3288 iface = list_entry(ptr, struct hostap_interface, list); 3289 if (iface->type == HOSTAP_INTERFACE_MASTER) { 3290 /* special handling for this interface below */ 3291 continue; 3292 } 3293 hostap_remove_interface(iface->dev, 0, 1); 3294 } 3295 3296 unregister_netdev(local->dev); 3297 3298 flush_work(&local->reset_queue); 3299 flush_work(&local->set_multicast_list_queue); 3300 flush_work(&local->set_tim_queue); 3301 #ifndef PRISM2_NO_STATION_MODES 3302 flush_work(&local->info_queue); 3303 #endif 3304 flush_work(&local->comms_qual_update); 3305 3306 lib80211_crypt_info_free(&local->crypt_info); 3307 3308 if (timer_pending(&local->passive_scan_timer)) 3309 del_timer(&local->passive_scan_timer); 3310 3311 if (timer_pending(&local->tick_timer)) 3312 del_timer(&local->tick_timer); 3313 3314 prism2_clear_cmd_queue(local); 3315 3316 skb_queue_purge(&local->info_list); 3317 skb_queue_purge(&local->rx_list); 3318 skb_queue_purge(&local->sta_tx_exc_list); 3319 3320 if (local->dev_enabled) 3321 prism2_callback(local, PRISM2_CALLBACK_DISABLE); 3322 3323 if (local->ap != NULL) 3324 hostap_free_data(local->ap); 3325 3326 #ifndef PRISM2_NO_PROCFS_DEBUG 3327 if (local->proc != NULL) 3328 remove_proc_entry("registers", local->proc); 3329 #endif /* PRISM2_NO_PROCFS_DEBUG */ 3330 hostap_remove_proc(local); 3331 3332 tx_cb = local->tx_callback; 3333 while (tx_cb != NULL) { 3334 tx_cb_prev = tx_cb; 3335 tx_cb = tx_cb->next; 3336 kfree(tx_cb_prev); 3337 } 3338 3339 hostap_set_hostapd(local, 0, 0); 3340 hostap_set_hostapd_sta(local, 0, 0); 3341 3342 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) { 3343 if (local->frag_cache[i].skb != NULL) 3344 dev_kfree_skb(local->frag_cache[i].skb); 3345 } 3346 3347 #ifdef PRISM2_DOWNLOAD_SUPPORT 3348 prism2_download_free_data(local->dl_pri); 3349 prism2_download_free_data(local->dl_sec); 3350 #endif /* PRISM2_DOWNLOAD_SUPPORT */ 3351 3352 prism2_clear_set_tim_queue(local); 3353 3354 list_for_each_safe(ptr, n, &local->bss_list) { 3355 struct hostap_bss_info *bss = 3356 list_entry(ptr, struct hostap_bss_info, list); 3357 kfree(bss); 3358 } 3359 3360 kfree(local->pda); 3361 kfree(local->last_scan_results); 3362 kfree(local->generic_elem); 3363 3364 free_netdev(local->dev); 3365 } 3366 3367 3368 #if defined(PRISM2_PCI) || defined(PRISM2_PCCARD) 3369 static void __maybe_unused prism2_suspend(struct net_device *dev) 3370 { 3371 struct hostap_interface *iface; 3372 struct local_info *local; 3373 union iwreq_data wrqu; 3374 3375 iface = netdev_priv(dev); 3376 local = iface->local; 3377 3378 /* Send disconnect event, e.g., to trigger reassociation after resume 3379 * if wpa_supplicant is used. */ 3380 memset(&wrqu, 0, sizeof(wrqu)); 3381 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 3382 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL); 3383 3384 /* Disable hardware and firmware */ 3385 prism2_hw_shutdown(dev, 0); 3386 } 3387 #endif /* PRISM2_PCI || PRISM2_PCCARD */ 3388 3389 3390 /* These might at some point be compiled separately and used as separate 3391 * kernel modules or linked into one */ 3392 #ifdef PRISM2_DOWNLOAD_SUPPORT 3393 #include "hostap_download.c" 3394 #endif /* PRISM2_DOWNLOAD_SUPPORT */ 3395 3396 #ifdef PRISM2_CALLBACK 3397 /* External hostap_callback.c file can be used to, e.g., blink activity led. 3398 * This can use platform specific code and must define prism2_callback() 3399 * function (if PRISM2_CALLBACK is not defined, these function calls are not 3400 * used. */ 3401 #include "hostap_callback.c" 3402 #endif /* PRISM2_CALLBACK */ 3403