1/* 2 * Copyright (C) 2002 Intersil Americas Inc. 3 * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org> 4 * Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 */ 20 21#include <linux/hardirq.h> 22#include <linux/module.h> 23#include <linux/slab.h> 24 25#include <linux/netdevice.h> 26#include <linux/ethtool.h> 27#include <linux/pci.h> 28#include <linux/sched.h> 29#include <linux/etherdevice.h> 30#include <linux/delay.h> 31#include <linux/if_arp.h> 32 33#include <asm/io.h> 34 35#include "prismcompat.h" 36#include "isl_38xx.h" 37#include "isl_ioctl.h" 38#include "islpci_dev.h" 39#include "islpci_mgt.h" 40#include "islpci_eth.h" 41#include "oid_mgt.h" 42 43#define ISL3877_IMAGE_FILE "isl3877" 44#define ISL3886_IMAGE_FILE "isl3886" 45#define ISL3890_IMAGE_FILE "isl3890" 46MODULE_FIRMWARE(ISL3877_IMAGE_FILE); 47MODULE_FIRMWARE(ISL3886_IMAGE_FILE); 48MODULE_FIRMWARE(ISL3890_IMAGE_FILE); 49 50static int prism54_bring_down(islpci_private *); 51static int islpci_alloc_memory(islpci_private *); 52 53/* Temporary dummy MAC address to use until firmware is loaded. 54 * The idea there is that some tools (such as nameif) may query 55 * the MAC address before the netdev is 'open'. By using a valid 56 * OUI prefix, they can process the netdev properly. 57 * Of course, this is not the final/real MAC address. It doesn't 58 * matter, as you are suppose to be able to change it anytime via 59 * ndev->set_mac_address. Jean II */ 60static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 }; 61 62static int 63isl_upload_firmware(islpci_private *priv) 64{ 65 u32 reg, rc; 66 void __iomem *device_base = priv->device_base; 67 68 /* clear the RAMBoot and the Reset bit */ 69 reg = readl(device_base + ISL38XX_CTRL_STAT_REG); 70 reg &= ~ISL38XX_CTRL_STAT_RESET; 71 reg &= ~ISL38XX_CTRL_STAT_RAMBOOT; 72 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 73 wmb(); 74 udelay(ISL38XX_WRITEIO_DELAY); 75 76 /* set the Reset bit without reading the register ! */ 77 reg |= ISL38XX_CTRL_STAT_RESET; 78 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 79 wmb(); 80 udelay(ISL38XX_WRITEIO_DELAY); 81 82 /* clear the Reset bit */ 83 reg &= ~ISL38XX_CTRL_STAT_RESET; 84 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 85 wmb(); 86 87 /* wait a while for the device to reboot */ 88 mdelay(50); 89 90 { 91 const struct firmware *fw_entry = NULL; 92 long fw_len; 93 const u32 *fw_ptr; 94 95 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV); 96 if (rc) { 97 printk(KERN_ERR 98 "%s: request_firmware() failed for '%s'\n", 99 "prism54", priv->firmware); 100 return rc; 101 } 102 /* prepare the Direct Memory Base register */ 103 reg = ISL38XX_DEV_FIRMWARE_ADDRES; 104 105 fw_ptr = (u32 *) fw_entry->data; 106 fw_len = fw_entry->size; 107 108 if (fw_len % 4) { 109 printk(KERN_ERR 110 "%s: firmware '%s' size is not multiple of 32bit, aborting!\n", 111 "prism54", priv->firmware); 112 release_firmware(fw_entry); 113 return -EILSEQ; /* Illegal byte sequence */; 114 } 115 116 while (fw_len > 0) { 117 long _fw_len = 118 (fw_len > 119 ISL38XX_MEMORY_WINDOW_SIZE) ? 120 ISL38XX_MEMORY_WINDOW_SIZE : fw_len; 121 u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN; 122 123 /* set the card's base address for writing the data */ 124 isl38xx_w32_flush(device_base, reg, 125 ISL38XX_DIR_MEM_BASE_REG); 126 wmb(); /* be paranoid */ 127 128 /* increment the write address for next iteration */ 129 reg += _fw_len; 130 fw_len -= _fw_len; 131 132 /* write the data to the Direct Memory Window 32bit-wise */ 133 /* memcpy_toio() doesn't guarantee 32bit writes :-| */ 134 while (_fw_len > 0) { 135 /* use non-swapping writel() */ 136 __raw_writel(*fw_ptr, dev_fw_ptr); 137 fw_ptr++, dev_fw_ptr++; 138 _fw_len -= 4; 139 } 140 141 /* flush PCI posting */ 142 (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH); 143 wmb(); /* be paranoid again */ 144 145 BUG_ON(_fw_len != 0); 146 } 147 148 BUG_ON(fw_len != 0); 149 150 /* Firmware version is at offset 40 (also for "newmac") */ 151 printk(KERN_DEBUG "%s: firmware version: %.8s\n", 152 priv->ndev->name, fw_entry->data + 40); 153 154 release_firmware(fw_entry); 155 } 156 157 /* now reset the device 158 * clear the Reset & ClkRun bit, set the RAMBoot bit */ 159 reg = readl(device_base + ISL38XX_CTRL_STAT_REG); 160 reg &= ~ISL38XX_CTRL_STAT_CLKRUN; 161 reg &= ~ISL38XX_CTRL_STAT_RESET; 162 reg |= ISL38XX_CTRL_STAT_RAMBOOT; 163 isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG); 164 wmb(); 165 udelay(ISL38XX_WRITEIO_DELAY); 166 167 /* set the reset bit latches the host override and RAMBoot bits 168 * into the device for operation when the reset bit is reset */ 169 reg |= ISL38XX_CTRL_STAT_RESET; 170 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 171 /* don't do flush PCI posting here! */ 172 wmb(); 173 udelay(ISL38XX_WRITEIO_DELAY); 174 175 /* clear the reset bit should start the whole circus */ 176 reg &= ~ISL38XX_CTRL_STAT_RESET; 177 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 178 /* don't do flush PCI posting here! */ 179 wmb(); 180 udelay(ISL38XX_WRITEIO_DELAY); 181 182 return 0; 183} 184 185/****************************************************************************** 186 Device Interrupt Handler 187******************************************************************************/ 188 189irqreturn_t 190islpci_interrupt(int irq, void *config) 191{ 192 u32 reg; 193 islpci_private *priv = config; 194 struct net_device *ndev = priv->ndev; 195 void __iomem *device = priv->device_base; 196 int powerstate = ISL38XX_PSM_POWERSAVE_STATE; 197 198 /* lock the interrupt handler */ 199 spin_lock(&priv->slock); 200 201 /* received an interrupt request on a shared IRQ line 202 * first check whether the device is in sleep mode */ 203 reg = readl(device + ISL38XX_CTRL_STAT_REG); 204 if (reg & ISL38XX_CTRL_STAT_SLEEPMODE) 205 /* device is in sleep mode, IRQ was generated by someone else */ 206 { 207#if VERBOSE > SHOW_ERROR_MESSAGES 208 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n"); 209#endif 210 spin_unlock(&priv->slock); 211 return IRQ_NONE; 212 } 213 214 215 /* check whether there is any source of interrupt on the device */ 216 reg = readl(device + ISL38XX_INT_IDENT_REG); 217 218 /* also check the contents of the Interrupt Enable Register, because this 219 * will filter out interrupt sources from other devices on the same irq ! */ 220 reg &= readl(device + ISL38XX_INT_EN_REG); 221 reg &= ISL38XX_INT_SOURCES; 222 223 if (reg != 0) { 224 if (islpci_get_state(priv) != PRV_STATE_SLEEP) 225 powerstate = ISL38XX_PSM_ACTIVE_STATE; 226 227 /* reset the request bits in the Identification register */ 228 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG); 229 230#if VERBOSE > SHOW_ERROR_MESSAGES 231 DEBUG(SHOW_FUNCTION_CALLS, 232 "IRQ: Identification register 0x%p 0x%x\n", device, reg); 233#endif 234 235 /* check for each bit in the register separately */ 236 if (reg & ISL38XX_INT_IDENT_UPDATE) { 237#if VERBOSE > SHOW_ERROR_MESSAGES 238 /* Queue has been updated */ 239 DEBUG(SHOW_TRACING, "IRQ: Update flag\n"); 240 241 DEBUG(SHOW_QUEUE_INDEXES, 242 "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n", 243 le32_to_cpu(priv->control_block-> 244 driver_curr_frag[0]), 245 le32_to_cpu(priv->control_block-> 246 driver_curr_frag[1]), 247 le32_to_cpu(priv->control_block-> 248 driver_curr_frag[2]), 249 le32_to_cpu(priv->control_block-> 250 driver_curr_frag[3]), 251 le32_to_cpu(priv->control_block-> 252 driver_curr_frag[4]), 253 le32_to_cpu(priv->control_block-> 254 driver_curr_frag[5]) 255 ); 256 257 DEBUG(SHOW_QUEUE_INDEXES, 258 "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n", 259 le32_to_cpu(priv->control_block-> 260 device_curr_frag[0]), 261 le32_to_cpu(priv->control_block-> 262 device_curr_frag[1]), 263 le32_to_cpu(priv->control_block-> 264 device_curr_frag[2]), 265 le32_to_cpu(priv->control_block-> 266 device_curr_frag[3]), 267 le32_to_cpu(priv->control_block-> 268 device_curr_frag[4]), 269 le32_to_cpu(priv->control_block-> 270 device_curr_frag[5]) 271 ); 272#endif 273 274 /* cleanup the data low transmit queue */ 275 islpci_eth_cleanup_transmit(priv, priv->control_block); 276 277 /* device is in active state, update the 278 * powerstate flag if necessary */ 279 powerstate = ISL38XX_PSM_ACTIVE_STATE; 280 281 /* check all three queues in priority order 282 * call the PIMFOR receive function until the 283 * queue is empty */ 284 if (isl38xx_in_queue(priv->control_block, 285 ISL38XX_CB_RX_MGMTQ) != 0) { 286#if VERBOSE > SHOW_ERROR_MESSAGES 287 DEBUG(SHOW_TRACING, 288 "Received frame in Management Queue\n"); 289#endif 290 islpci_mgt_receive(ndev); 291 292 islpci_mgt_cleanup_transmit(ndev); 293 294 /* Refill slots in receive queue */ 295 islpci_mgmt_rx_fill(ndev); 296 297 /* no need to trigger the device, next 298 islpci_mgt_transaction does it */ 299 } 300 301 while (isl38xx_in_queue(priv->control_block, 302 ISL38XX_CB_RX_DATA_LQ) != 0) { 303#if VERBOSE > SHOW_ERROR_MESSAGES 304 DEBUG(SHOW_TRACING, 305 "Received frame in Data Low Queue\n"); 306#endif 307 islpci_eth_receive(priv); 308 } 309 310 /* check whether the data transmit queues were full */ 311 if (priv->data_low_tx_full) { 312 /* check whether the transmit is not full anymore */ 313 if (ISL38XX_CB_TX_QSIZE - 314 isl38xx_in_queue(priv->control_block, 315 ISL38XX_CB_TX_DATA_LQ) >= 316 ISL38XX_MIN_QTHRESHOLD) { 317 /* nope, the driver is ready for more network frames */ 318 netif_wake_queue(priv->ndev); 319 320 /* reset the full flag */ 321 priv->data_low_tx_full = 0; 322 } 323 } 324 } 325 326 if (reg & ISL38XX_INT_IDENT_INIT) { 327 /* Device has been initialized */ 328#if VERBOSE > SHOW_ERROR_MESSAGES 329 DEBUG(SHOW_TRACING, 330 "IRQ: Init flag, device initialized\n"); 331#endif 332 wake_up(&priv->reset_done); 333 } 334 335 if (reg & ISL38XX_INT_IDENT_SLEEP) { 336 /* Device intends to move to powersave state */ 337#if VERBOSE > SHOW_ERROR_MESSAGES 338 DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n"); 339#endif 340 isl38xx_handle_sleep_request(priv->control_block, 341 &powerstate, 342 priv->device_base); 343 } 344 345 if (reg & ISL38XX_INT_IDENT_WAKEUP) { 346 /* Device has been woken up to active state */ 347#if VERBOSE > SHOW_ERROR_MESSAGES 348 DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n"); 349#endif 350 351 isl38xx_handle_wakeup(priv->control_block, 352 &powerstate, priv->device_base); 353 } 354 } else { 355#if VERBOSE > SHOW_ERROR_MESSAGES 356 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n"); 357#endif 358 spin_unlock(&priv->slock); 359 return IRQ_NONE; 360 } 361 362 /* sleep -> ready */ 363 if (islpci_get_state(priv) == PRV_STATE_SLEEP 364 && powerstate == ISL38XX_PSM_ACTIVE_STATE) 365 islpci_set_state(priv, PRV_STATE_READY); 366 367 /* !sleep -> sleep */ 368 if (islpci_get_state(priv) != PRV_STATE_SLEEP 369 && powerstate == ISL38XX_PSM_POWERSAVE_STATE) 370 islpci_set_state(priv, PRV_STATE_SLEEP); 371 372 /* unlock the interrupt handler */ 373 spin_unlock(&priv->slock); 374 375 return IRQ_HANDLED; 376} 377 378/****************************************************************************** 379 Network Interface Control & Statistical functions 380******************************************************************************/ 381static int 382islpci_open(struct net_device *ndev) 383{ 384 u32 rc; 385 islpci_private *priv = netdev_priv(ndev); 386 387 /* reset data structures, upload firmware and reset device */ 388 rc = islpci_reset(priv,1); 389 if (rc) { 390 prism54_bring_down(priv); 391 return rc; /* Returns informative message */ 392 } 393 394 netif_start_queue(ndev); 395 396 /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on 397 * once the firmware receives a trap of being associated 398 * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we 399 * should just leave the carrier on as its expected the firmware 400 * won't send us a trigger. */ 401 if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC) 402 netif_carrier_off(ndev); 403 else 404 netif_carrier_on(ndev); 405 406 return 0; 407} 408 409static int 410islpci_close(struct net_device *ndev) 411{ 412 islpci_private *priv = netdev_priv(ndev); 413 414 printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name); 415 416 netif_stop_queue(ndev); 417 418 return prism54_bring_down(priv); 419} 420 421static int 422prism54_bring_down(islpci_private *priv) 423{ 424 void __iomem *device_base = priv->device_base; 425 u32 reg; 426 /* we are going to shutdown the device */ 427 islpci_set_state(priv, PRV_STATE_PREBOOT); 428 429 /* disable all device interrupts in case they weren't */ 430 isl38xx_disable_interrupts(priv->device_base); 431 432 /* For safety reasons, we may want to ensure that no DMA transfer is 433 * currently in progress by emptying the TX and RX queues. */ 434 435 /* wait until interrupts have finished executing on other CPUs */ 436 synchronize_irq(priv->pdev->irq); 437 438 reg = readl(device_base + ISL38XX_CTRL_STAT_REG); 439 reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT); 440 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 441 wmb(); 442 udelay(ISL38XX_WRITEIO_DELAY); 443 444 reg |= ISL38XX_CTRL_STAT_RESET; 445 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 446 wmb(); 447 udelay(ISL38XX_WRITEIO_DELAY); 448 449 /* clear the Reset bit */ 450 reg &= ~ISL38XX_CTRL_STAT_RESET; 451 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 452 wmb(); 453 454 /* wait a while for the device to reset */ 455 schedule_timeout_uninterruptible(msecs_to_jiffies(50)); 456 457 return 0; 458} 459 460static int 461islpci_upload_fw(islpci_private *priv) 462{ 463 islpci_state_t old_state; 464 u32 rc; 465 466 old_state = islpci_set_state(priv, PRV_STATE_BOOT); 467 468 printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name); 469 470 rc = isl_upload_firmware(priv); 471 if (rc) { 472 /* error uploading the firmware */ 473 printk(KERN_ERR "%s: could not upload firmware ('%s')\n", 474 priv->ndev->name, priv->firmware); 475 476 islpci_set_state(priv, old_state); 477 return rc; 478 } 479 480 printk(KERN_DEBUG "%s: firmware upload complete\n", 481 priv->ndev->name); 482 483 islpci_set_state(priv, PRV_STATE_POSTBOOT); 484 485 return 0; 486} 487 488static int 489islpci_reset_if(islpci_private *priv) 490{ 491 long remaining; 492 int result = -ETIME; 493 int count; 494 495 DEFINE_WAIT(wait); 496 prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE); 497 498 /* now the last step is to reset the interface */ 499 isl38xx_interface_reset(priv->device_base, priv->device_host_address); 500 islpci_set_state(priv, PRV_STATE_PREINIT); 501 502 for(count = 0; count < 2 && result; count++) { 503 /* The software reset acknowledge needs about 220 msec here. 504 * Be conservative and wait for up to one second. */ 505 506 remaining = schedule_timeout_uninterruptible(HZ); 507 508 if(remaining > 0) { 509 result = 0; 510 break; 511 } 512 513 /* If we're here it's because our IRQ hasn't yet gone through. 514 * Retry a bit more... 515 */ 516 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n", 517 priv->ndev->name); 518 } 519 520 finish_wait(&priv->reset_done, &wait); 521 522 if (result) { 523 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name); 524 return result; 525 } 526 527 islpci_set_state(priv, PRV_STATE_INIT); 528 529 /* Now that the device is 100% up, let's allow 530 * for the other interrupts -- 531 * NOTE: this is not *yet* true since we've only allowed the 532 * INIT interrupt on the IRQ line. We can perhaps poll 533 * the IRQ line until we know for sure the reset went through */ 534 isl38xx_enable_common_interrupts(priv->device_base); 535 536 down_write(&priv->mib_sem); 537 result = mgt_commit(priv); 538 if (result) { 539 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name); 540 up_write(&priv->mib_sem); 541 return result; 542 } 543 up_write(&priv->mib_sem); 544 545 islpci_set_state(priv, PRV_STATE_READY); 546 547 printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name); 548 return 0; 549} 550 551int 552islpci_reset(islpci_private *priv, int reload_firmware) 553{ 554 isl38xx_control_block *cb = /* volatile not needed */ 555 (isl38xx_control_block *) priv->control_block; 556 unsigned counter; 557 int rc; 558 559 if (reload_firmware) 560 islpci_set_state(priv, PRV_STATE_PREBOOT); 561 else 562 islpci_set_state(priv, PRV_STATE_POSTBOOT); 563 564 printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name); 565 566 /* disable all device interrupts in case they weren't */ 567 isl38xx_disable_interrupts(priv->device_base); 568 569 /* flush all management queues */ 570 priv->index_mgmt_tx = 0; 571 priv->index_mgmt_rx = 0; 572 573 /* clear the indexes in the frame pointer */ 574 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) { 575 cb->driver_curr_frag[counter] = cpu_to_le32(0); 576 cb->device_curr_frag[counter] = cpu_to_le32(0); 577 } 578 579 /* reset the mgmt receive queue */ 580 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) { 581 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter]; 582 frag->size = cpu_to_le16(MGMT_FRAME_SIZE); 583 frag->flags = 0; 584 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr); 585 } 586 587 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { 588 cb->rx_data_low[counter].address = 589 cpu_to_le32((u32) priv->pci_map_rx_address[counter]); 590 } 591 592 /* since the receive queues are filled with empty fragments, now we can 593 * set the corresponding indexes in the Control Block */ 594 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] = 595 cpu_to_le32(ISL38XX_CB_RX_QSIZE); 596 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] = 597 cpu_to_le32(ISL38XX_CB_MGMT_QSIZE); 598 599 /* reset the remaining real index registers and full flags */ 600 priv->free_data_rx = 0; 601 priv->free_data_tx = 0; 602 priv->data_low_tx_full = 0; 603 604 if (reload_firmware) { /* Should we load the firmware ? */ 605 /* now that the data structures are cleaned up, upload 606 * firmware and reset interface */ 607 rc = islpci_upload_fw(priv); 608 if (rc) { 609 printk(KERN_ERR "%s: islpci_reset: failure\n", 610 priv->ndev->name); 611 return rc; 612 } 613 } 614 615 /* finally reset interface */ 616 rc = islpci_reset_if(priv); 617 if (rc) 618 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n"); 619 return rc; 620} 621 622/****************************************************************************** 623 Network device configuration functions 624******************************************************************************/ 625static int 626islpci_alloc_memory(islpci_private *priv) 627{ 628 int counter; 629 630#if VERBOSE > SHOW_ERROR_MESSAGES 631 printk(KERN_DEBUG "islpci_alloc_memory\n"); 632#endif 633 634 /* remap the PCI device base address to accessible */ 635 if (!(priv->device_base = 636 ioremap(pci_resource_start(priv->pdev, 0), 637 ISL38XX_PCI_MEM_SIZE))) { 638 /* error in remapping the PCI device memory address range */ 639 printk(KERN_ERR "PCI memory remapping failed\n"); 640 return -1; 641 } 642 643 /* memory layout for consistent DMA region: 644 * 645 * Area 1: Control Block for the device interface 646 * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that 647 * the number of supported stations in the AP determines the minimal 648 * size of the buffer ! 649 */ 650 651 /* perform the allocation */ 652 priv->driver_mem_address = pci_alloc_consistent(priv->pdev, 653 HOST_MEM_BLOCK, 654 &priv-> 655 device_host_address); 656 657 if (!priv->driver_mem_address) { 658 /* error allocating the block of PCI memory */ 659 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!", 660 "prism54"); 661 return -1; 662 } 663 664 /* assign the Control Block to the first address of the allocated area */ 665 priv->control_block = 666 (isl38xx_control_block *) priv->driver_mem_address; 667 668 /* set the Power Save Buffer pointer directly behind the CB */ 669 priv->device_psm_buffer = 670 priv->device_host_address + CONTROL_BLOCK_SIZE; 671 672 /* make sure all buffer pointers are initialized */ 673 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) { 674 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0); 675 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0); 676 } 677 678 priv->index_mgmt_rx = 0; 679 memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx)); 680 memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx)); 681 682 /* allocate rx queue for management frames */ 683 if (islpci_mgmt_rx_fill(priv->ndev) < 0) 684 goto out_free; 685 686 /* now get the data rx skb's */ 687 memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx)); 688 memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address)); 689 690 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { 691 struct sk_buff *skb; 692 693 /* allocate an sk_buff for received data frames storage 694 * each frame on receive size consists of 1 fragment 695 * include any required allignment operations */ 696 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) { 697 /* error allocating an sk_buff structure elements */ 698 printk(KERN_ERR "Error allocating skb.\n"); 699 skb = NULL; 700 goto out_free; 701 } 702 skb_reserve(skb, (4 - (long) skb->data) & 0x03); 703 /* add the new allocated sk_buff to the buffer array */ 704 priv->data_low_rx[counter] = skb; 705 706 /* map the allocated skb data area to pci */ 707 priv->pci_map_rx_address[counter] = 708 pci_map_single(priv->pdev, (void *) skb->data, 709 MAX_FRAGMENT_SIZE_RX + 2, 710 PCI_DMA_FROMDEVICE); 711 if (!priv->pci_map_rx_address[counter]) { 712 /* error mapping the buffer to device 713 accessible memory address */ 714 printk(KERN_ERR "failed to map skb DMA'able\n"); 715 goto out_free; 716 } 717 } 718 719 prism54_acl_init(&priv->acl); 720 prism54_wpa_bss_ie_init(priv); 721 if (mgt_init(priv)) 722 goto out_free; 723 724 return 0; 725 out_free: 726 islpci_free_memory(priv); 727 return -1; 728} 729 730int 731islpci_free_memory(islpci_private *priv) 732{ 733 int counter; 734 735 if (priv->device_base) 736 iounmap(priv->device_base); 737 priv->device_base = NULL; 738 739 /* free consistent DMA area... */ 740 if (priv->driver_mem_address) 741 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK, 742 priv->driver_mem_address, 743 priv->device_host_address); 744 745 /* clear some dangling pointers */ 746 priv->driver_mem_address = NULL; 747 priv->device_host_address = 0; 748 priv->device_psm_buffer = 0; 749 priv->control_block = NULL; 750 751 /* clean up mgmt rx buffers */ 752 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) { 753 struct islpci_membuf *buf = &priv->mgmt_rx[counter]; 754 if (buf->pci_addr) 755 pci_unmap_single(priv->pdev, buf->pci_addr, 756 buf->size, PCI_DMA_FROMDEVICE); 757 buf->pci_addr = 0; 758 kfree(buf->mem); 759 buf->size = 0; 760 buf->mem = NULL; 761 } 762 763 /* clean up data rx buffers */ 764 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { 765 if (priv->pci_map_rx_address[counter]) 766 pci_unmap_single(priv->pdev, 767 priv->pci_map_rx_address[counter], 768 MAX_FRAGMENT_SIZE_RX + 2, 769 PCI_DMA_FROMDEVICE); 770 priv->pci_map_rx_address[counter] = 0; 771 772 if (priv->data_low_rx[counter]) 773 dev_kfree_skb(priv->data_low_rx[counter]); 774 priv->data_low_rx[counter] = NULL; 775 } 776 777 /* Free the access control list and the WPA list */ 778 prism54_acl_clean(&priv->acl); 779 prism54_wpa_bss_ie_clean(priv); 780 mgt_clean(priv); 781 782 return 0; 783} 784 785#if 0 786static void 787islpci_set_multicast_list(struct net_device *dev) 788{ 789 /* put device into promisc mode and let network layer handle it */ 790} 791#endif 792 793static void islpci_ethtool_get_drvinfo(struct net_device *dev, 794 struct ethtool_drvinfo *info) 795{ 796 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 797 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 798} 799 800static const struct ethtool_ops islpci_ethtool_ops = { 801 .get_drvinfo = islpci_ethtool_get_drvinfo, 802}; 803 804static const struct net_device_ops islpci_netdev_ops = { 805 .ndo_open = islpci_open, 806 .ndo_stop = islpci_close, 807 .ndo_start_xmit = islpci_eth_transmit, 808 .ndo_tx_timeout = islpci_eth_tx_timeout, 809 .ndo_set_mac_address = prism54_set_mac_address, 810 .ndo_change_mtu = eth_change_mtu, 811 .ndo_validate_addr = eth_validate_addr, 812}; 813 814struct net_device * 815islpci_setup(struct pci_dev *pdev) 816{ 817 islpci_private *priv; 818 struct net_device *ndev = alloc_etherdev(sizeof (islpci_private)); 819 820 if (!ndev) 821 return ndev; 822 823 pci_set_drvdata(pdev, ndev); 824#if defined(SET_NETDEV_DEV) 825 SET_NETDEV_DEV(ndev, &pdev->dev); 826#endif 827 828 /* setup the structure members */ 829 ndev->base_addr = pci_resource_start(pdev, 0); 830 ndev->irq = pdev->irq; 831 832 /* initialize the function pointers */ 833 ndev->netdev_ops = &islpci_netdev_ops; 834 ndev->wireless_handlers = &prism54_handler_def; 835 ndev->ethtool_ops = &islpci_ethtool_ops; 836 837 /* ndev->set_multicast_list = &islpci_set_multicast_list; */ 838 ndev->addr_len = ETH_ALEN; 839 /* Get a non-zero dummy MAC address for nameif. Jean II */ 840 memcpy(ndev->dev_addr, dummy_mac, 6); 841 842 ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT; 843 844 /* allocate a private device structure to the network device */ 845 priv = netdev_priv(ndev); 846 priv->ndev = ndev; 847 priv->pdev = pdev; 848 priv->monitor_type = ARPHRD_IEEE80211; 849 priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ? 850 priv->monitor_type : ARPHRD_ETHER; 851 852 /* Add pointers to enable iwspy support. */ 853 priv->wireless_data.spy_data = &priv->spy_data; 854 ndev->wireless_data = &priv->wireless_data; 855 856 /* save the start and end address of the PCI memory area */ 857 ndev->mem_start = (unsigned long) priv->device_base; 858 ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE; 859 860#if VERBOSE > SHOW_ERROR_MESSAGES 861 DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base); 862#endif 863 864 init_waitqueue_head(&priv->reset_done); 865 866 /* init the queue read locks, process wait counter */ 867 mutex_init(&priv->mgmt_lock); 868 priv->mgmt_received = NULL; 869 init_waitqueue_head(&priv->mgmt_wqueue); 870 mutex_init(&priv->stats_lock); 871 spin_lock_init(&priv->slock); 872 873 /* init state machine with off#1 state */ 874 priv->state = PRV_STATE_OFF; 875 priv->state_off = 1; 876 877 /* initialize workqueue's */ 878 INIT_WORK(&priv->stats_work, prism54_update_stats); 879 priv->stats_timestamp = 0; 880 881 INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake); 882 priv->reset_task_pending = 0; 883 884 /* allocate various memory areas */ 885 if (islpci_alloc_memory(priv)) 886 goto do_free_netdev; 887 888 /* select the firmware file depending on the device id */ 889 switch (pdev->device) { 890 case 0x3877: 891 strcpy(priv->firmware, ISL3877_IMAGE_FILE); 892 break; 893 894 case 0x3886: 895 strcpy(priv->firmware, ISL3886_IMAGE_FILE); 896 break; 897 898 default: 899 strcpy(priv->firmware, ISL3890_IMAGE_FILE); 900 break; 901 } 902 903 if (register_netdev(ndev)) { 904 DEBUG(SHOW_ERROR_MESSAGES, 905 "ERROR: register_netdev() failed\n"); 906 goto do_islpci_free_memory; 907 } 908 909 return ndev; 910 911 do_islpci_free_memory: 912 islpci_free_memory(priv); 913 do_free_netdev: 914 pci_set_drvdata(pdev, NULL); 915 free_netdev(ndev); 916 priv = NULL; 917 return NULL; 918} 919 920islpci_state_t 921islpci_set_state(islpci_private *priv, islpci_state_t new_state) 922{ 923 islpci_state_t old_state; 924 925 /* lock */ 926 old_state = priv->state; 927 928 /* this means either a race condition or some serious error in 929 * the driver code */ 930 switch (new_state) { 931 case PRV_STATE_OFF: 932 priv->state_off++; 933 default: 934 priv->state = new_state; 935 break; 936 937 case PRV_STATE_PREBOOT: 938 /* there are actually many off-states, enumerated by 939 * state_off */ 940 if (old_state == PRV_STATE_OFF) 941 priv->state_off--; 942 943 /* only if hw_unavailable is zero now it means we either 944 * were in off#1 state, or came here from 945 * somewhere else */ 946 if (!priv->state_off) 947 priv->state = new_state; 948 break; 949 } 950#if 0 951 printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n", 952 priv->ndev->name, old_state, new_state, priv->state_off); 953#endif 954 955 /* invariants */ 956 BUG_ON(priv->state_off < 0); 957 BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF)); 958 BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF)); 959 960 /* unlock */ 961 return old_state; 962} 963