1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2008, cozybit Inc. 4 * Copyright (C) 2003-2006, Marvell International Ltd. 5 */ 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/hardirq.h> 9 #include <linux/slab.h> 10 #include <linux/export.h> 11 12 #include "libertas_tf.h" 13 14 static const struct channel_range channel_ranges[] = { 15 { LBTF_REGDOMAIN_US, 1, 12 }, 16 { LBTF_REGDOMAIN_CA, 1, 12 }, 17 { LBTF_REGDOMAIN_EU, 1, 14 }, 18 { LBTF_REGDOMAIN_JP, 1, 14 }, 19 { LBTF_REGDOMAIN_SP, 1, 14 }, 20 { LBTF_REGDOMAIN_FR, 1, 14 }, 21 }; 22 23 static u16 lbtf_region_code_to_index[MRVDRV_MAX_REGION_CODE] = 24 { 25 LBTF_REGDOMAIN_US, LBTF_REGDOMAIN_CA, LBTF_REGDOMAIN_EU, 26 LBTF_REGDOMAIN_SP, LBTF_REGDOMAIN_FR, LBTF_REGDOMAIN_JP, 27 }; 28 29 static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv); 30 31 32 /** 33 * lbtf_cmd_copyback - Simple callback that copies response back into command 34 * 35 * @priv A pointer to struct lbtf_private structure 36 * @extra A pointer to the original command structure for which 37 * 'resp' is a response 38 * @resp A pointer to the command response 39 * 40 * Returns: 0 on success, error on failure 41 */ 42 int lbtf_cmd_copyback(struct lbtf_private *priv, unsigned long extra, 43 struct cmd_header *resp) 44 { 45 struct cmd_header *buf = (void *)extra; 46 uint16_t copy_len; 47 48 copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size)); 49 memcpy(buf, resp, copy_len); 50 return 0; 51 } 52 EXPORT_SYMBOL_GPL(lbtf_cmd_copyback); 53 54 #define CHAN_TO_IDX(chan) ((chan) - 1) 55 56 static void lbtf_geo_init(struct lbtf_private *priv) 57 { 58 const struct channel_range *range = channel_ranges; 59 u8 ch; 60 int i; 61 62 for (i = 0; i < ARRAY_SIZE(channel_ranges); i++) 63 if (channel_ranges[i].regdomain == priv->regioncode) { 64 range = &channel_ranges[i]; 65 break; 66 } 67 68 for (ch = range->start; ch < range->end; ch++) 69 priv->channels[CHAN_TO_IDX(ch)].flags = 0; 70 } 71 72 /** 73 * lbtf_update_hw_spec: Updates the hardware details. 74 * 75 * @priv A pointer to struct lbtf_private structure 76 * 77 * Returns: 0 on success, error on failure 78 */ 79 int lbtf_update_hw_spec(struct lbtf_private *priv) 80 { 81 struct cmd_ds_get_hw_spec cmd; 82 int ret = -1; 83 u32 i; 84 85 lbtf_deb_enter(LBTF_DEB_CMD); 86 87 memset(&cmd, 0, sizeof(cmd)); 88 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 89 memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN); 90 ret = lbtf_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd); 91 if (ret) 92 goto out; 93 94 priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo); 95 96 /* The firmware release is in an interesting format: the patch 97 * level is in the most significant nibble ... so fix that: */ 98 priv->fwrelease = le32_to_cpu(cmd.fwrelease); 99 priv->fwrelease = (priv->fwrelease << 8) | 100 (priv->fwrelease >> 24 & 0xff); 101 102 printk(KERN_INFO "libertastf: %pM, fw %u.%u.%up%u, cap 0x%08x\n", 103 cmd.permanentaddr, 104 priv->fwrelease >> 24 & 0xff, 105 priv->fwrelease >> 16 & 0xff, 106 priv->fwrelease >> 8 & 0xff, 107 priv->fwrelease & 0xff, 108 priv->fwcapinfo); 109 lbtf_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n", 110 cmd.hwifversion, cmd.version); 111 112 /* Clamp region code to 8-bit since FW spec indicates that it should 113 * only ever be 8-bit, even though the field size is 16-bit. Some 114 * firmware returns non-zero high 8 bits here. 115 */ 116 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF; 117 118 for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) { 119 /* use the region code to search for the index */ 120 if (priv->regioncode == lbtf_region_code_to_index[i]) 121 break; 122 } 123 124 /* if it's unidentified region code, use the default (USA) */ 125 if (i >= MRVDRV_MAX_REGION_CODE) { 126 priv->regioncode = 0x10; 127 pr_info("unidentified region code; using the default (USA)\n"); 128 } 129 130 if (priv->current_addr[0] == 0xff) 131 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN); 132 133 SET_IEEE80211_PERM_ADDR(priv->hw, priv->current_addr); 134 135 lbtf_geo_init(priv); 136 out: 137 lbtf_deb_leave(LBTF_DEB_CMD); 138 return ret; 139 } 140 141 /** 142 * lbtf_set_channel: Set the radio channel 143 * 144 * @priv A pointer to struct lbtf_private structure 145 * @channel The desired channel, or 0 to clear a locked channel 146 * 147 * Returns: 0 on success, error on failure 148 */ 149 int lbtf_set_channel(struct lbtf_private *priv, u8 channel) 150 { 151 int ret = 0; 152 struct cmd_ds_802_11_rf_channel cmd; 153 154 lbtf_deb_enter(LBTF_DEB_CMD); 155 156 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 157 cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET); 158 cmd.channel = cpu_to_le16(channel); 159 160 ret = lbtf_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd); 161 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret); 162 return ret; 163 } 164 165 int lbtf_beacon_set(struct lbtf_private *priv, struct sk_buff *beacon) 166 { 167 struct cmd_ds_802_11_beacon_set cmd; 168 int size; 169 170 lbtf_deb_enter(LBTF_DEB_CMD); 171 172 if (beacon->len > MRVL_MAX_BCN_SIZE) { 173 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", -1); 174 return -1; 175 } 176 size = sizeof(cmd) - sizeof(cmd.beacon) + beacon->len; 177 cmd.hdr.size = cpu_to_le16(size); 178 cmd.len = cpu_to_le16(beacon->len); 179 memcpy(cmd.beacon, (u8 *) beacon->data, beacon->len); 180 181 lbtf_cmd_async(priv, CMD_802_11_BEACON_SET, &cmd.hdr, size); 182 183 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", 0); 184 return 0; 185 } 186 187 int lbtf_beacon_ctrl(struct lbtf_private *priv, bool beacon_enable, 188 int beacon_int) 189 { 190 struct cmd_ds_802_11_beacon_control cmd; 191 lbtf_deb_enter(LBTF_DEB_CMD); 192 193 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 194 cmd.action = cpu_to_le16(CMD_ACT_SET); 195 cmd.beacon_enable = cpu_to_le16(beacon_enable); 196 cmd.beacon_period = cpu_to_le16(beacon_int); 197 198 lbtf_cmd_async(priv, CMD_802_11_BEACON_CTRL, &cmd.hdr, sizeof(cmd)); 199 200 lbtf_deb_leave(LBTF_DEB_CMD); 201 return 0; 202 } 203 204 static void lbtf_queue_cmd(struct lbtf_private *priv, 205 struct cmd_ctrl_node *cmdnode) 206 { 207 unsigned long flags; 208 lbtf_deb_enter(LBTF_DEB_HOST); 209 210 if (!cmdnode) { 211 lbtf_deb_host("QUEUE_CMD: cmdnode is NULL\n"); 212 goto qcmd_done; 213 } 214 215 if (!cmdnode->cmdbuf->size) { 216 lbtf_deb_host("DNLD_CMD: cmd size is zero\n"); 217 goto qcmd_done; 218 } 219 220 cmdnode->result = 0; 221 spin_lock_irqsave(&priv->driver_lock, flags); 222 list_add_tail(&cmdnode->list, &priv->cmdpendingq); 223 spin_unlock_irqrestore(&priv->driver_lock, flags); 224 225 lbtf_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n", 226 le16_to_cpu(cmdnode->cmdbuf->command)); 227 228 qcmd_done: 229 lbtf_deb_leave(LBTF_DEB_HOST); 230 } 231 232 static void lbtf_submit_command(struct lbtf_private *priv, 233 struct cmd_ctrl_node *cmdnode) 234 { 235 unsigned long flags; 236 struct cmd_header *cmd; 237 uint16_t cmdsize; 238 uint16_t command; 239 int timeo = 5 * HZ; 240 int ret; 241 242 lbtf_deb_enter(LBTF_DEB_HOST); 243 244 cmd = cmdnode->cmdbuf; 245 246 spin_lock_irqsave(&priv->driver_lock, flags); 247 priv->cur_cmd = cmdnode; 248 cmdsize = le16_to_cpu(cmd->size); 249 command = le16_to_cpu(cmd->command); 250 251 lbtf_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n", 252 command, le16_to_cpu(cmd->seqnum), cmdsize); 253 lbtf_deb_hex(LBTF_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize); 254 255 ret = priv->ops->hw_host_to_card(priv, MVMS_CMD, (u8 *)cmd, cmdsize); 256 spin_unlock_irqrestore(&priv->driver_lock, flags); 257 258 if (ret) { 259 pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret); 260 /* Let the timer kick in and retry, and potentially reset 261 the whole thing if the condition persists */ 262 timeo = HZ; 263 } 264 265 /* Setup the timer after transmit command */ 266 mod_timer(&priv->command_timer, jiffies + timeo); 267 268 lbtf_deb_leave(LBTF_DEB_HOST); 269 } 270 271 /** 272 * This function inserts command node to cmdfreeq 273 * after cleans it. Requires priv->driver_lock held. 274 */ 275 static void __lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv, 276 struct cmd_ctrl_node *cmdnode) 277 { 278 lbtf_deb_enter(LBTF_DEB_HOST); 279 280 if (!cmdnode) 281 goto cl_ins_out; 282 283 cmdnode->callback = NULL; 284 cmdnode->callback_arg = 0; 285 286 memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE); 287 288 list_add_tail(&cmdnode->list, &priv->cmdfreeq); 289 290 cl_ins_out: 291 lbtf_deb_leave(LBTF_DEB_HOST); 292 } 293 294 static void lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv, 295 struct cmd_ctrl_node *ptempcmd) 296 { 297 unsigned long flags; 298 299 spin_lock_irqsave(&priv->driver_lock, flags); 300 __lbtf_cleanup_and_insert_cmd(priv, ptempcmd); 301 spin_unlock_irqrestore(&priv->driver_lock, flags); 302 } 303 304 void lbtf_complete_command(struct lbtf_private *priv, struct cmd_ctrl_node *cmd, 305 int result) 306 { 307 cmd->result = result; 308 cmd->cmdwaitqwoken = 1; 309 wake_up_interruptible(&cmd->cmdwait_q); 310 311 if (!cmd->callback) 312 __lbtf_cleanup_and_insert_cmd(priv, cmd); 313 priv->cur_cmd = NULL; 314 } 315 316 int lbtf_cmd_set_mac_multicast_addr(struct lbtf_private *priv) 317 { 318 struct cmd_ds_mac_multicast_addr cmd; 319 320 lbtf_deb_enter(LBTF_DEB_CMD); 321 322 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 323 cmd.action = cpu_to_le16(CMD_ACT_SET); 324 325 cmd.nr_of_adrs = cpu_to_le16((u16) priv->nr_of_multicastmacaddr); 326 327 lbtf_deb_cmd("MULTICAST_ADR: setting %d addresses\n", cmd.nr_of_adrs); 328 329 memcpy(cmd.maclist, priv->multicastlist, 330 priv->nr_of_multicastmacaddr * ETH_ALEN); 331 332 lbtf_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &cmd.hdr, sizeof(cmd)); 333 334 lbtf_deb_leave(LBTF_DEB_CMD); 335 return 0; 336 } 337 338 void lbtf_set_mode(struct lbtf_private *priv, enum lbtf_mode mode) 339 { 340 struct cmd_ds_set_mode cmd; 341 lbtf_deb_enter(LBTF_DEB_WEXT); 342 343 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 344 cmd.mode = cpu_to_le16(mode); 345 lbtf_deb_wext("Switching to mode: 0x%x\n", mode); 346 lbtf_cmd_async(priv, CMD_802_11_SET_MODE, &cmd.hdr, sizeof(cmd)); 347 348 lbtf_deb_leave(LBTF_DEB_WEXT); 349 } 350 351 void lbtf_set_bssid(struct lbtf_private *priv, bool activate, const u8 *bssid) 352 { 353 struct cmd_ds_set_bssid cmd; 354 lbtf_deb_enter(LBTF_DEB_CMD); 355 356 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 357 cmd.activate = activate ? 1 : 0; 358 if (activate) 359 memcpy(cmd.bssid, bssid, ETH_ALEN); 360 361 lbtf_cmd_async(priv, CMD_802_11_SET_BSSID, &cmd.hdr, sizeof(cmd)); 362 lbtf_deb_leave(LBTF_DEB_CMD); 363 } 364 365 int lbtf_set_mac_address(struct lbtf_private *priv, uint8_t *mac_addr) 366 { 367 struct cmd_ds_802_11_mac_address cmd; 368 lbtf_deb_enter(LBTF_DEB_CMD); 369 370 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 371 cmd.action = cpu_to_le16(CMD_ACT_SET); 372 373 memcpy(cmd.macadd, mac_addr, ETH_ALEN); 374 375 lbtf_cmd_async(priv, CMD_802_11_MAC_ADDRESS, &cmd.hdr, sizeof(cmd)); 376 lbtf_deb_leave(LBTF_DEB_CMD); 377 return 0; 378 } 379 380 int lbtf_set_radio_control(struct lbtf_private *priv) 381 { 382 int ret = 0; 383 struct cmd_ds_802_11_radio_control cmd; 384 385 lbtf_deb_enter(LBTF_DEB_CMD); 386 387 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 388 cmd.action = cpu_to_le16(CMD_ACT_SET); 389 390 switch (priv->preamble) { 391 case CMD_TYPE_SHORT_PREAMBLE: 392 cmd.control = cpu_to_le16(SET_SHORT_PREAMBLE); 393 break; 394 395 case CMD_TYPE_LONG_PREAMBLE: 396 cmd.control = cpu_to_le16(SET_LONG_PREAMBLE); 397 break; 398 399 case CMD_TYPE_AUTO_PREAMBLE: 400 default: 401 cmd.control = cpu_to_le16(SET_AUTO_PREAMBLE); 402 break; 403 } 404 405 if (priv->radioon) 406 cmd.control |= cpu_to_le16(TURN_ON_RF); 407 else 408 cmd.control &= cpu_to_le16(~TURN_ON_RF); 409 410 lbtf_deb_cmd("RADIO_SET: radio %d, preamble %d\n", priv->radioon, 411 priv->preamble); 412 413 ret = lbtf_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd); 414 415 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret); 416 return ret; 417 } 418 419 void lbtf_set_mac_control(struct lbtf_private *priv) 420 { 421 struct cmd_ds_mac_control cmd; 422 lbtf_deb_enter(LBTF_DEB_CMD); 423 424 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 425 cmd.action = cpu_to_le16(priv->mac_control); 426 cmd.reserved = 0; 427 428 lbtf_cmd_async(priv, CMD_MAC_CONTROL, 429 &cmd.hdr, sizeof(cmd)); 430 431 lbtf_deb_leave(LBTF_DEB_CMD); 432 } 433 434 /** 435 * lbtf_allocate_cmd_buffer - Allocates cmd buffer, links it to free cmd queue 436 * 437 * @priv A pointer to struct lbtf_private structure 438 * 439 * Returns: 0 on success. 440 */ 441 int lbtf_allocate_cmd_buffer(struct lbtf_private *priv) 442 { 443 int ret = 0; 444 u32 bufsize; 445 u32 i; 446 struct cmd_ctrl_node *cmdarray; 447 448 lbtf_deb_enter(LBTF_DEB_HOST); 449 450 /* Allocate and initialize the command array */ 451 bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS; 452 cmdarray = kzalloc(bufsize, GFP_KERNEL); 453 if (!cmdarray) { 454 lbtf_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n"); 455 ret = -1; 456 goto done; 457 } 458 priv->cmd_array = cmdarray; 459 460 /* Allocate and initialize each command buffer in the command array */ 461 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) { 462 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL); 463 if (!cmdarray[i].cmdbuf) { 464 lbtf_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n"); 465 ret = -1; 466 goto done; 467 } 468 } 469 470 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) { 471 init_waitqueue_head(&cmdarray[i].cmdwait_q); 472 lbtf_cleanup_and_insert_cmd(priv, &cmdarray[i]); 473 } 474 475 ret = 0; 476 477 done: 478 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %d", ret); 479 return ret; 480 } 481 482 /** 483 * lbtf_free_cmd_buffer - Frees the cmd buffer. 484 * 485 * @priv A pointer to struct lbtf_private structure 486 * 487 * Returns: 0 488 */ 489 int lbtf_free_cmd_buffer(struct lbtf_private *priv) 490 { 491 struct cmd_ctrl_node *cmdarray; 492 unsigned int i; 493 494 lbtf_deb_enter(LBTF_DEB_HOST); 495 496 /* need to check if cmd array is allocated or not */ 497 if (priv->cmd_array == NULL) { 498 lbtf_deb_host("FREE_CMD_BUF: cmd_array is NULL\n"); 499 goto done; 500 } 501 502 cmdarray = priv->cmd_array; 503 504 /* Release shared memory buffers */ 505 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) { 506 kfree(cmdarray[i].cmdbuf); 507 cmdarray[i].cmdbuf = NULL; 508 } 509 510 /* Release cmd_ctrl_node */ 511 kfree(priv->cmd_array); 512 priv->cmd_array = NULL; 513 514 done: 515 lbtf_deb_leave(LBTF_DEB_HOST); 516 return 0; 517 } 518 519 /** 520 * lbtf_get_cmd_ctrl_node - Gets free cmd node from free cmd queue. 521 * 522 * @priv A pointer to struct lbtf_private structure 523 * 524 * Returns: pointer to a struct cmd_ctrl_node or NULL if none available. 525 */ 526 static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv) 527 { 528 struct cmd_ctrl_node *tempnode; 529 unsigned long flags; 530 531 lbtf_deb_enter(LBTF_DEB_HOST); 532 533 if (!priv) 534 return NULL; 535 536 spin_lock_irqsave(&priv->driver_lock, flags); 537 538 if (!list_empty(&priv->cmdfreeq)) { 539 tempnode = list_first_entry(&priv->cmdfreeq, 540 struct cmd_ctrl_node, list); 541 list_del(&tempnode->list); 542 } else { 543 lbtf_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n"); 544 tempnode = NULL; 545 } 546 547 spin_unlock_irqrestore(&priv->driver_lock, flags); 548 549 lbtf_deb_leave(LBTF_DEB_HOST); 550 return tempnode; 551 } 552 553 /** 554 * lbtf_execute_next_command: execute next command in cmd pending queue. 555 * 556 * @priv A pointer to struct lbtf_private structure 557 * 558 * Returns: 0 on success. 559 */ 560 int lbtf_execute_next_command(struct lbtf_private *priv) 561 { 562 struct cmd_ctrl_node *cmdnode = NULL; 563 struct cmd_header *cmd; 564 unsigned long flags; 565 int ret = 0; 566 567 /* Debug group is lbtf_deb_THREAD and not lbtf_deb_HOST, because the 568 * only caller to us is lbtf_thread() and we get even when a 569 * data packet is received */ 570 lbtf_deb_enter(LBTF_DEB_THREAD); 571 572 spin_lock_irqsave(&priv->driver_lock, flags); 573 574 if (priv->cur_cmd) { 575 pr_alert("EXEC_NEXT_CMD: already processing command!\n"); 576 spin_unlock_irqrestore(&priv->driver_lock, flags); 577 ret = -1; 578 goto done; 579 } 580 581 if (!list_empty(&priv->cmdpendingq)) { 582 cmdnode = list_first_entry(&priv->cmdpendingq, 583 struct cmd_ctrl_node, list); 584 } 585 586 if (cmdnode) { 587 cmd = cmdnode->cmdbuf; 588 589 list_del(&cmdnode->list); 590 lbtf_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n", 591 le16_to_cpu(cmd->command)); 592 spin_unlock_irqrestore(&priv->driver_lock, flags); 593 lbtf_submit_command(priv, cmdnode); 594 } else 595 spin_unlock_irqrestore(&priv->driver_lock, flags); 596 597 ret = 0; 598 done: 599 lbtf_deb_leave(LBTF_DEB_THREAD); 600 return ret; 601 } 602 603 static struct cmd_ctrl_node *__lbtf_cmd_async(struct lbtf_private *priv, 604 uint16_t command, struct cmd_header *in_cmd, int in_cmd_size, 605 int (*callback)(struct lbtf_private *, unsigned long, 606 struct cmd_header *), 607 unsigned long callback_arg) 608 { 609 struct cmd_ctrl_node *cmdnode; 610 611 lbtf_deb_enter(LBTF_DEB_HOST); 612 613 if (priv->surpriseremoved) { 614 lbtf_deb_host("PREP_CMD: card removed\n"); 615 cmdnode = ERR_PTR(-ENOENT); 616 goto done; 617 } 618 619 cmdnode = lbtf_get_cmd_ctrl_node(priv); 620 if (cmdnode == NULL) { 621 lbtf_deb_host("PREP_CMD: cmdnode is NULL\n"); 622 623 /* Wake up main thread to execute next command */ 624 queue_work(lbtf_wq, &priv->cmd_work); 625 cmdnode = ERR_PTR(-ENOBUFS); 626 goto done; 627 } 628 629 cmdnode->callback = callback; 630 cmdnode->callback_arg = callback_arg; 631 632 /* Copy the incoming command to the buffer */ 633 memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size); 634 635 /* Set sequence number, clean result, move to buffer */ 636 priv->seqnum++; 637 cmdnode->cmdbuf->command = cpu_to_le16(command); 638 cmdnode->cmdbuf->size = cpu_to_le16(in_cmd_size); 639 cmdnode->cmdbuf->seqnum = cpu_to_le16(priv->seqnum); 640 cmdnode->cmdbuf->result = 0; 641 642 lbtf_deb_host("PREP_CMD: command 0x%04x\n", command); 643 644 cmdnode->cmdwaitqwoken = 0; 645 lbtf_queue_cmd(priv, cmdnode); 646 queue_work(lbtf_wq, &priv->cmd_work); 647 648 done: 649 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %p", cmdnode); 650 return cmdnode; 651 } 652 653 void lbtf_cmd_async(struct lbtf_private *priv, uint16_t command, 654 struct cmd_header *in_cmd, int in_cmd_size) 655 { 656 lbtf_deb_enter(LBTF_DEB_CMD); 657 __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size, NULL, 0); 658 lbtf_deb_leave(LBTF_DEB_CMD); 659 } 660 661 int __lbtf_cmd(struct lbtf_private *priv, uint16_t command, 662 struct cmd_header *in_cmd, int in_cmd_size, 663 int (*callback)(struct lbtf_private *, 664 unsigned long, struct cmd_header *), 665 unsigned long callback_arg) 666 { 667 struct cmd_ctrl_node *cmdnode; 668 unsigned long flags; 669 int ret = 0; 670 671 lbtf_deb_enter(LBTF_DEB_HOST); 672 673 cmdnode = __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size, 674 callback, callback_arg); 675 if (IS_ERR(cmdnode)) { 676 ret = PTR_ERR(cmdnode); 677 goto done; 678 } 679 680 might_sleep(); 681 ret = wait_event_interruptible(cmdnode->cmdwait_q, 682 cmdnode->cmdwaitqwoken); 683 if (ret) { 684 pr_info("PREP_CMD: command 0x%04x interrupted by signal: %d\n", 685 command, ret); 686 goto done; 687 } 688 689 spin_lock_irqsave(&priv->driver_lock, flags); 690 ret = cmdnode->result; 691 if (ret) 692 pr_info("PREP_CMD: command 0x%04x failed: %d\n", 693 command, ret); 694 695 __lbtf_cleanup_and_insert_cmd(priv, cmdnode); 696 spin_unlock_irqrestore(&priv->driver_lock, flags); 697 698 done: 699 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %d", ret); 700 return ret; 701 } 702 EXPORT_SYMBOL_GPL(__lbtf_cmd); 703 704 /* Call holding driver_lock */ 705 void lbtf_cmd_response_rx(struct lbtf_private *priv) 706 { 707 priv->cmd_response_rxed = 1; 708 queue_work(lbtf_wq, &priv->cmd_work); 709 } 710 EXPORT_SYMBOL_GPL(lbtf_cmd_response_rx); 711 712 int lbtf_process_rx_command(struct lbtf_private *priv) 713 { 714 uint16_t respcmd, curcmd; 715 struct cmd_header *resp; 716 int ret = 0; 717 unsigned long flags; 718 uint16_t result; 719 720 lbtf_deb_enter(LBTF_DEB_CMD); 721 722 mutex_lock(&priv->lock); 723 spin_lock_irqsave(&priv->driver_lock, flags); 724 725 if (!priv->cur_cmd) { 726 ret = -1; 727 spin_unlock_irqrestore(&priv->driver_lock, flags); 728 goto done; 729 } 730 731 resp = (void *)priv->cmd_resp_buff; 732 curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command); 733 respcmd = le16_to_cpu(resp->command); 734 result = le16_to_cpu(resp->result); 735 736 lbtf_deb_cmd("libertastf: cmd response 0x%04x, seq %d, size %d\n", 737 respcmd, le16_to_cpu(resp->seqnum), 738 le16_to_cpu(resp->size)); 739 740 if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) { 741 spin_unlock_irqrestore(&priv->driver_lock, flags); 742 ret = -1; 743 goto done; 744 } 745 if (respcmd != CMD_RET(curcmd)) { 746 spin_unlock_irqrestore(&priv->driver_lock, flags); 747 ret = -1; 748 goto done; 749 } 750 751 if (resp->result == cpu_to_le16(0x0004)) { 752 /* 0x0004 means -EAGAIN. Drop the response, let it time out 753 and be resubmitted */ 754 spin_unlock_irqrestore(&priv->driver_lock, flags); 755 ret = -1; 756 goto done; 757 } 758 759 /* Now we got response from FW, cancel the command timer */ 760 del_timer(&priv->command_timer); 761 priv->cmd_timed_out = 0; 762 if (priv->nr_retries) 763 priv->nr_retries = 0; 764 765 /* If the command is not successful, cleanup and return failure */ 766 if ((result != 0 || !(respcmd & 0x8000))) { 767 /* 768 * Handling errors here 769 */ 770 switch (respcmd) { 771 case CMD_RET(CMD_GET_HW_SPEC): 772 case CMD_RET(CMD_802_11_RESET): 773 pr_info("libertastf: reset failed\n"); 774 break; 775 776 } 777 lbtf_complete_command(priv, priv->cur_cmd, result); 778 spin_unlock_irqrestore(&priv->driver_lock, flags); 779 780 ret = -1; 781 goto done; 782 } 783 784 spin_unlock_irqrestore(&priv->driver_lock, flags); 785 786 if (priv->cur_cmd && priv->cur_cmd->callback) { 787 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg, 788 resp); 789 } 790 spin_lock_irqsave(&priv->driver_lock, flags); 791 792 if (priv->cur_cmd) { 793 /* Clean up and Put current command back to cmdfreeq */ 794 lbtf_complete_command(priv, priv->cur_cmd, result); 795 } 796 spin_unlock_irqrestore(&priv->driver_lock, flags); 797 798 done: 799 mutex_unlock(&priv->lock); 800 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret); 801 return ret; 802 } 803