drivers/staging/wlags49_h2/wl_pci.c

   1 /*******************************************************************************
   2  * Agere Systems Inc.
   3  * Wireless device driver for Linux (wlags49).
   4  *
   5  * Copyright (c) 1998-2003 Agere Systems Inc.
   6  * All rights reserved.
   7  *   http://www.agere.com
   8  *
   9  * Initially developed by TriplePoint, Inc.
  10  *   http://www.triplepoint.com
  11  *
  12  *------------------------------------------------------------------------------
  13  *
  14  *   This file contains processing and initialization specific to PCI/miniPCI
  15  *   devices.
  16  *
  17  *------------------------------------------------------------------------------
  18  *
  19  * SOFTWARE LICENSE
  20  *
  21  * This software is provided subject to the following terms and conditions,
  22  * which you should read carefully before using the software.  Using this
  23  * software indicates your acceptance of these terms and conditions.  If you do
  24  * not agree with these terms and conditions, do not use the software.
  25  *
  26  * Copyright © 2003 Agere Systems Inc.
  27  * All rights reserved.
  28  *
  29  * Redistribution and use in source or binary forms, with or without
  30  * modifications, are permitted provided that the following conditions are met:
  31  *
  32  * . Redistributions of source code must retain the above copyright notice, this
  33  *    list of conditions and the following Disclaimer as comments in the code as
  34  *    well as in the documentation and/or other materials provided with the
  35  *    distribution.
  36  *
  37  * . Redistributions in binary form must reproduce the above copyright notice,
  38  *    this list of conditions and the following Disclaimer in the documentation
  39  *    and/or other materials provided with the distribution.
  40  *
  41  * . Neither the name of Agere Systems Inc. nor the names of the contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * Disclaimer
  46  *
  47  * THIS SOFTWARE IS PROVIDED \93AS IS\94 AND ANY EXPRESS OR IMPLIED WARRANTIES,
  48  * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
  49  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  ANY
  50  * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
  51  * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
  52  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  53  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  54  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  55  * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  57  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  58  * DAMAGE.
  59  *
  60  ******************************************************************************/
  61
  62 /*******************************************************************************
  63  * include files
  64  ******************************************************************************/
  65 #include <wireless/wl_version.h>
  66
  67 #include <linux/module.h>
  68 #include <linux/kernel.h>
  69 #include <linux/errno.h>
  70 #include <linux/pci.h>
  71 #include <linux/init.h>
  72 #include <linux/sched.h>
  73 #include <linux/ptrace.h>
  74 #include <linux/ctype.h>
  75 #include <linux/string.h>
  76 //#include <linux/timer.h>
  77 #include <linux/interrupt.h>
  78 #include <linux/in.h>
  79 #include <linux/delay.h>
  80 #include <asm/system.h>
  81 #include <asm/io.h>
  82 #include <asm/irq.h>
  83 #include <asm/bitops.h>
  84 #include <asm/uaccess.h>
  85
  86 #include <linux/ethtool.h>
  87 #include <linux/netdevice.h>
  88 #include <linux/etherdevice.h>
  89 #include <linux/skbuff.h>
  90 #include <linux/if_arp.h>
  91 #include <linux/ioport.h>
  92
  93 #include <hcf/debug.h>
  94
  95 #include <hcf.h>
  96 #include <dhf.h>
  97 #include <hcfdef.h>
  98
  99 #include <wireless/wl_if.h>
 100 #include <wireless/wl_internal.h>
 101 #include <wireless/wl_util.h>
 102 #include <wireless/wl_main.h>
 103 #include <wireless/wl_netdev.h>
 104 #include <wireless/wl_pci.h>
 105
 106
 107 /*******************************************************************************
 108  * global variables
 109  ******************************************************************************/
 110 #if DBG
 111 extern dbg_info_t *DbgInfo;
 112 #endif  // DBG
 113
 114 /* define the PCI device Table Cardname and id tables */
 115 enum hermes_pci_versions {
 116         CH_Agere_Systems_Mini_PCI_V1 = 0,
 117 };
 118
 119 static struct pci_device_id wl_pci_tbl[] __devinitdata = {
 120         { PCI_VENDOR_ID_WL_LKM, PCI_DEVICE_ID_WL_LKM_0,
 121           PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Agere_Systems_Mini_PCI_V1 },
 122         { PCI_VENDOR_ID_WL_LKM, PCI_DEVICE_ID_WL_LKM_1,
 123           PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Agere_Systems_Mini_PCI_V1 },
 124         { PCI_VENDOR_ID_WL_LKM, PCI_DEVICE_ID_WL_LKM_2,
 125           PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Agere_Systems_Mini_PCI_V1 },
 126
 127         { }                     /* Terminating entry */
 128 };
 129
 130 MODULE_DEVICE_TABLE(pci, wl_pci_tbl);
 131
 132 /*******************************************************************************
 133  * function prototypes
 134  ******************************************************************************/
 135 int __devinit wl_pci_probe( struct pci_dev *pdev,
 136                                 const struct pci_device_id *ent );
 137 void __devexit wl_pci_remove(struct pci_dev *pdev);
 138 int wl_pci_setup( struct pci_dev *pdev );
 139 void wl_pci_enable_cardbus_interrupts( struct pci_dev *pdev );
 140
 141 #ifdef ENABLE_DMA
 142 int wl_pci_dma_alloc( struct pci_dev *pdev, struct wl_private *lp );
 143 int wl_pci_dma_free( struct pci_dev *pdev, struct wl_private *lp );
 144 int wl_pci_dma_alloc_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
 145                                 DESC_STRCT **desc );
 146 int wl_pci_dma_free_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
 147                                 DESC_STRCT **desc );
 148 int wl_pci_dma_alloc_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
 149                                 DESC_STRCT **desc );
 150 int wl_pci_dma_free_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
 151                                 DESC_STRCT **desc );
 152 int wl_pci_dma_alloc_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
 153                                    DESC_STRCT **desc, int size );
 154 int wl_pci_dma_free_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
 155                                    DESC_STRCT **desc );
 156 int wl_pci_dma_alloc_desc( struct pci_dev *pdev, struct wl_private *lp,
 157                            DESC_STRCT **desc );
 158 int wl_pci_dma_free_desc( struct pci_dev *pdev, struct wl_private *lp,
 159                            DESC_STRCT **desc );
 160 int wl_pci_dma_alloc_buf( struct pci_dev *pdev, struct wl_private *lp,
 161                           DESC_STRCT *desc, int size );
 162 int wl_pci_dma_free_buf( struct pci_dev *pdev, struct wl_private *lp,
 163                           DESC_STRCT *desc );
 164
 165 void wl_pci_dma_hcf_reclaim_rx( struct wl_private *lp );
 166 #endif  // ENABLE_DMA
 167
 168 /*******************************************************************************
 169  * PCI module function registration
 170  ******************************************************************************/
 171 static struct pci_driver wl_driver =
 172 {
 173         name:           MODULE_NAME,
 174     id_table:   wl_pci_tbl,
 175         probe:          wl_pci_probe,
 176         remove:         __devexit_p(wl_pci_remove),
 177     suspend:    NULL,
 178     resume:     NULL,
 179 };
 180
 181 /*******************************************************************************
 182  *      wl_adapter_init_module()
 183  *******************************************************************************
 184  *
 185  *  DESCRIPTION:
 186  *
 187  *      Called by init_module() to perform PCI-specific driver initialization.
 188  *
 189  *  PARAMETERS:
 190  *
 191  *      N/A
 192  *
 193  *  RETURNS:
 194  *
 195  *      0
 196  *
 197  ******************************************************************************/
 198 int wl_adapter_init_module( void )
 199 {
 200     int result;
 201     /*------------------------------------------------------------------------*/
 202
 203     DBG_FUNC( "wl_adapter_init_module()" );
 204     DBG_ENTER( DbgInfo );
 205     DBG_TRACE( DbgInfo, "wl_adapter_init_module() -- PCI\n" );
 206
 207     result = pci_register_driver( &wl_driver ); //;?replace with pci_module_init, Rubini pg 490
 208         //;? why not do something with the result
 209
 210     DBG_LEAVE( DbgInfo );
 211     return 0;
 212 } // wl_adapter_init_module
 213 /*============================================================================*/
 214
 215 /*******************************************************************************
 216  *      wl_adapter_cleanup_module()
 217  *******************************************************************************
 218  *
 219  *  DESCRIPTION:
 220  *
 221  *      Called by cleanup_module() to perform PCI-specific driver cleanup.
 222  *
 223  *  PARAMETERS:
 224  *
 225  *      N/A
 226  *
 227  *  RETURNS:
 228  *
 229  *      N/A
 230  *
 231  ******************************************************************************/
 232 void wl_adapter_cleanup_module( void )
 233 {
 234         //;?how comes wl_adapter_cleanup_module is located in a seemingly pci specific module
 235     DBG_FUNC( "wl_adapter_cleanup_module" );
 236     DBG_ENTER( DbgInfo );
 237
 238         //;?DBG_TRACE below feels like nearly redundant in the light of DBG_ENTER above
 239     DBG_TRACE( DbgInfo, "wl_adapter_cleanup_module() -- PCI\n" );
 240
 241     pci_unregister_driver( &wl_driver );
 242
 243     DBG_LEAVE( DbgInfo );
 244     return;
 245 } // wl_adapter_cleanup_module
 246 /*============================================================================*/
 247
 248 /*******************************************************************************
 249  *      wl_adapter_insert()
 250  *******************************************************************************
 251  *
 252  *  DESCRIPTION:
 253  *
 254  *      Called by wl_pci_probe() to continue the process of device insertion.
 255  *
 256  *  PARAMETERS:
 257  *
 258  *      dev - a pointer to the device's net_device structure
 259  *
 260  *  RETURNS:
 261  *
 262  *      TRUE or FALSE
 263  *
 264  ******************************************************************************/
 265 int wl_adapter_insert( struct net_device *dev )
 266 {
 267     int result = FALSE;
 268     /*------------------------------------------------------------------------*/
 269
 270     DBG_FUNC( "wl_adapter_insert" );
 271     DBG_ENTER( DbgInfo );
 272
 273     DBG_TRACE( DbgInfo, "wl_adapter_insert() -- PCI\n" );
 274
 275     if( dev == NULL ) {
 276         DBG_ERROR( DbgInfo, "net_device pointer is NULL!!!\n" );
 277     } else if( dev->priv == NULL ) {
 278         DBG_ERROR( DbgInfo, "wl_private pointer is NULL!!!\n" );
 279     } else if( wl_insert( dev ) ) { /* Perform remaining device initialization */
 280                 result = TRUE;
 281         } else {
 282         DBG_TRACE( DbgInfo, "wl_insert() FAILED\n" );
 283     }
 284     DBG_LEAVE( DbgInfo );
 285     return result;
 286 } // wl_adapter_insert
 287 /*============================================================================*/
 288
 289 /*******************************************************************************
 290  *      wl_adapter_open()
 291  *******************************************************************************
 292  *
 293  *  DESCRIPTION:
 294  *
 295  *      Open the device.
 296  *
 297  *  PARAMETERS:
 298  *
 299  *      dev - a pointer to the device's net_device structure
 300  *
 301  *  RETURNS:
 302  *
 303  *      an HCF status code
 304  *
 305  ******************************************************************************/
 306 int wl_adapter_open( struct net_device *dev )
 307 {
 308     int         result = 0;
 309     int         hcf_status = HCF_SUCCESS;
 310     /*------------------------------------------------------------------------*/
 311
 312     DBG_FUNC( "wl_adapter_open" );
 313     DBG_ENTER( DbgInfo );
 314
 315     DBG_TRACE( DbgInfo, "wl_adapter_open() -- PCI\n" );
 316
 317     hcf_status = wl_open( dev );
 318
 319     if( hcf_status != HCF_SUCCESS ) {
 320         result = -ENODEV;
 321     }
 322
 323     DBG_LEAVE( DbgInfo );
 324     return result;
 325 } // wl_adapter_open
 326 /*============================================================================*/
 327
 328 /*******************************************************************************
 329  *      wl_adapter_close()
 330  *******************************************************************************
 331  *
 332  *  DESCRIPTION:
 333  *
 334  *      Close the device
 335  *
 336  *  PARAMETERS:
 337  *
 338  *      dev - a pointer to the device's net_device structure
 339  *
 340  *  RETURNS:
 341  *
 342  *      0
 343  *
 344  ******************************************************************************/
 345 int wl_adapter_close( struct net_device *dev )
 346 {
 347     DBG_FUNC( "wl_adapter_close" );
 348     DBG_ENTER( DbgInfo );
 349
 350     DBG_TRACE( DbgInfo, "wl_adapter_close() -- PCI\n" );
 351     DBG_TRACE( DbgInfo, "%s: Shutting down adapter.\n", dev->name );
 352
 353     wl_close( dev );
 354
 355     DBG_LEAVE( DbgInfo );
 356     return 0;
 357 } // wl_adapter_close
 358 /*============================================================================*/
 359
 360 /*******************************************************************************
 361  *      wl_adapter_is_open()
 362  *******************************************************************************
 363  *
 364  *  DESCRIPTION:
 365  *
 366  *      Check whether this device is open. Returns
 367  *
 368  *  PARAMETERS:
 369  *
 370  *      dev - a pointer to the device's net_device structure
 371  *
 372  *  RETURNS:
 373  *
 374  *      nonzero if device is open.
 375  *
 376  ******************************************************************************/
 377 int wl_adapter_is_open( struct net_device *dev )
 378 {
 379     /* This function is used in PCMCIA to check the status of the 'open' field
 380        in the dev_link_t structure associated with a network device. There
 381        doesn't seem to be an analog to this for PCI, and checking the status
 382        contained in the net_device structure doesn't have the same effect.
 383        For now, return TRUE, but find out if this is necessary for PCI. */
 384
 385     return TRUE;
 386 } // wl_adapter_is_open
 387 /*============================================================================*/
 388
 389 /*******************************************************************************
 390  *      wl_pci_probe()
 391  *******************************************************************************
 392  *
 393  *  DESCRIPTION:
 394  *
 395  *      Registered in the pci_driver structure, this function is called when the
 396  *  PCI subsystem finds a new PCI device which matches the infomation contained
 397  *  in the pci_device_id table.
 398  *
 399  *  PARAMETERS:
 400  *
 401  *      pdev    - a pointer to the device's pci_dev structure
 402  *      ent     - this device's entry in the pci_device_id table
 403  *
 404  *  RETURNS:
 405  *
 406  *      0 on success
 407  *      errno value otherwise
 408  *
 409  ******************************************************************************/
 410 int __devinit wl_pci_probe( struct pci_dev *pdev,
 411                                 const struct pci_device_id *ent )
 412 {
 413     int result;
 414     /*------------------------------------------------------------------------*/
 415
 416     DBG_FUNC( "wl_pci_probe" );
 417     DBG_ENTER( DbgInfo );
 418         DBG_PRINT( "%s\n", VERSION_INFO );
 419
 420     result = wl_pci_setup( pdev );
 421
 422     DBG_LEAVE( DbgInfo );
 423
 424     return result;
 425 } // wl_pci_probe
 426 /*============================================================================*/
 427
 428 /*******************************************************************************
 429  *      wl_pci_remove()
 430  *******************************************************************************
 431  *
 432  *  DESCRIPTION:
 433  *
 434  *      Registered in the pci_driver structure, this function is called when the
 435  *  PCI subsystem detects that a PCI device which matches the infomation
 436  *  contained in the pci_device_id table has been removed.
 437  *
 438  *  PARAMETERS:
 439  *
 440  *      pdev - a pointer to the device's pci_dev structure
 441  *
 442  *  RETURNS:
 443  *
 444  *      N/A
 445  *
 446  ******************************************************************************/
 447 void __devexit wl_pci_remove(struct pci_dev *pdev)
 448 {
 449     struct net_device       *dev = NULL;
 450     /*------------------------------------------------------------------------*/
 451
 452     DBG_FUNC( "wl_pci_remove" );
 453     DBG_ENTER( DbgInfo );
 454
 455     /* Make sure the pci_dev pointer passed in is valid */
 456     if( pdev == NULL ) {
 457         DBG_ERROR( DbgInfo, "PCI subsys passed in an invalid pci_dev pointer\n" );
 458         return;
 459     }
 460
 461     dev = (struct net_device *)pci_get_drvdata( pdev );
 462     if( dev == NULL ) {
 463         DBG_ERROR( DbgInfo, "Could not retrieve net_device structure\n" );
 464         return;
 465     }
 466
 467     /* Perform device cleanup */
 468     wl_remove( dev );
 469     free_irq( dev->irq, dev );
 470
 471 #ifdef ENABLE_DMA
 472     wl_pci_dma_free( pdev, dev->priv );
 473 #endif
 474
 475     wl_device_dealloc( dev );
 476
 477     DBG_LEAVE( DbgInfo );
 478     return;
 479 } // wl_pci_remove
 480 /*============================================================================*/
 481
 482 /*******************************************************************************
 483  *      wl_pci_setup()
 484  *******************************************************************************
 485  *
 486  *  DESCRIPTION:
 487  *
 488  *      Called by wl_pci_probe() to begin a device's initialization process.
 489  *
 490  *  PARAMETERS:
 491  *
 492  *      pdev - a pointer to the device's pci_dev structure
 493  *
 494  *  RETURNS:
 495  *
 496  *      0 on success
 497  *      errno value otherwise
 498  *
 499  ******************************************************************************/
 500 int wl_pci_setup( struct pci_dev *pdev )
 501 {
 502     int                 result = 0;
 503     struct net_device   *dev = NULL;
 504     struct wl_private   *lp = NULL;
 505     /*------------------------------------------------------------------------*/
 506
 507     DBG_FUNC( "wl_pci_setup" );
 508     DBG_ENTER( DbgInfo );
 509
 510     /* Make sure the pci_dev pointer passed in is valid */
 511     if( pdev == NULL ) {
 512         DBG_ERROR( DbgInfo, "PCI subsys passed in an invalid pci_dev pointer\n" );
 513         return -ENODEV;
 514     }
 515
 516     result = pci_enable_device( pdev );
 517     if( result != 0 ) {
 518         DBG_ERROR( DbgInfo, "pci_enable_device() failed\n" );
 519         DBG_LEAVE( DbgInfo );
 520         return result;
 521     }
 522
 523     /* We found our device! Let's register it with the system */
 524     DBG_TRACE( DbgInfo, "Found our device, now registering\n" );
 525     dev = wl_device_alloc( );
 526     if( dev == NULL ) {
 527         DBG_ERROR( DbgInfo, "Could not register device!!!\n" );
 528         DBG_LEAVE( DbgInfo );
 529         return -ENOMEM;
 530     }
 531
 532     /* Make sure that space was allocated for our private adapter struct */
 533     if( dev->priv == NULL ) {
 534         DBG_ERROR( DbgInfo, "Private adapter struct was not allocated!!!\n" );
 535         DBG_LEAVE( DbgInfo );
 536         return -ENOMEM;
 537     }
 538
 539 #ifdef ENABLE_DMA
 540     /* Allocate DMA Descriptors */
 541     if( wl_pci_dma_alloc( pdev, dev->priv ) < 0 ) {
 542         DBG_ERROR( DbgInfo, "Could not allocate DMA descriptor memory!!!\n" );
 543         DBG_LEAVE( DbgInfo );
 544         return -ENOMEM;
 545     }
 546 #endif
 547
 548     /* Register our private adapter structure with PCI */
 549     pci_set_drvdata( pdev, dev );
 550
 551     /* Fill out bus specific information in the net_device struct */
 552     dev->irq = pdev->irq;
 553     SET_MODULE_OWNER( dev );
 554
 555     DBG_TRACE( DbgInfo, "Device Base Address: %#03lx\n", pdev->resource[0].start );
 556         dev->base_addr = pdev->resource[0].start;
 557
 558     /* Initialize our device here */
 559     if( !wl_adapter_insert( dev )) {
 560         DBG_ERROR( DbgInfo, "wl_adapter_insert() FAILED!!!\n" );
 561         wl_device_dealloc( dev );
 562         DBG_LEAVE( DbgInfo );
 563         return -EINVAL;
 564     }
 565
 566     /* Register our ISR */
 567     DBG_TRACE( DbgInfo, "Registering ISR...\n" );
 568
 569     result = request_irq(dev->irq, wl_isr, SA_SHIRQ, dev->name, dev);
 570     if( result ) {
 571         DBG_WARNING( DbgInfo, "Could not register ISR!!!\n" );
 572         DBG_LEAVE( DbgInfo );
 573         return result;
 574         }
 575
 576     /* Make sure interrupts are enabled properly for CardBus */
 577     lp = dev->priv;
 578
 579     if( lp->hcfCtx.IFB_BusType == CFG_NIC_BUS_TYPE_CARDBUS ||
 580             lp->hcfCtx.IFB_BusType == CFG_NIC_BUS_TYPE_PCI              ) {
 581         DBG_TRACE( DbgInfo, "This is a PCI/CardBus card, enable interrupts\n" );
 582         wl_pci_enable_cardbus_interrupts( pdev );
 583     }
 584
 585     /* Enable bus mastering */
 586     pci_set_master( pdev );
 587
 588     DBG_LEAVE( DbgInfo );
 589     return 0;
 590 } // wl_pci_setup
 591 /*============================================================================*/
 592
 593 /*******************************************************************************
 594  *      wl_pci_enable_cardbus_interrupts()
 595  *******************************************************************************
 596  *
 597  *  DESCRIPTION:
 598  *
 599  *      Called by wl_pci_setup() to enable interrupts on a CardBus device. This
 600  *  is done by writing bit 15 to the function event mask register. This
 601  *  CardBus-specific register is located in BAR2 (counting from BAR0), in memory
 602  *  space at byte offset 1f4 (7f4 for WARP).
 603  *
 604  *  PARAMETERS:
 605  *
 606  *      pdev - a pointer to the device's pci_dev structure
 607  *
 608  *  RETURNS:
 609  *
 610  *      N/A
 611  *
 612  ******************************************************************************/
 613 void wl_pci_enable_cardbus_interrupts( struct pci_dev *pdev )
 614 {
 615     u32                 bar2_reg;
 616     u32                 mem_addr_bus;
 617     u32                 func_evt_mask_reg;
 618     void                *mem_addr_kern = NULL;
 619     /*------------------------------------------------------------------------*/
 620
 621     DBG_FUNC( "wl_pci_enable_cardbus_interrupts" );
 622     DBG_ENTER( DbgInfo );
 623
 624     /* Initialize to known bad values */
 625     bar2_reg = 0xdeadbeef;
 626     mem_addr_bus = 0xdeadbeef;
 627
 628     /* Read the BAR2 register; this register contains the base address of the
 629        memory region where the function event mask register lives */
 630     pci_read_config_dword( pdev, PCI_BASE_ADDRESS_2, &bar2_reg );
 631     mem_addr_bus = bar2_reg & PCI_BASE_ADDRESS_MEM_MASK;
 632
 633     /* Once the base address is obtained, remap the memory region to kernel
 634        space so we can retrieve the register */
 635     mem_addr_kern = ioremap( mem_addr_bus, 0x200 );
 636
 637 #ifdef HERMES25
 638 #define REG_OFFSET  0x07F4
 639 #else
 640 #define REG_OFFSET  0x01F4
 641 #endif // HERMES25
 642
 643 #define BIT15       0x8000
 644
 645     /* Retrieve the functional event mask register, enable interrupts by
 646        setting Bit 15, and write back the value */
 647     func_evt_mask_reg = *(u32 *)( mem_addr_kern + REG_OFFSET );
 648     func_evt_mask_reg |= BIT15;
 649     *(u32 *)( mem_addr_kern + REG_OFFSET ) = func_evt_mask_reg;
 650
 651     /* Once complete, unmap the region and exit */
 652     iounmap( mem_addr_kern );
 653
 654     DBG_LEAVE( DbgInfo );
 655     return;
 656 } // wl_pci_enable_cardbus_interrupts
 657 /*============================================================================*/
 658
 659 #ifdef ENABLE_DMA
 660 /*******************************************************************************
 661  *      wl_pci_dma_alloc()
 662  *******************************************************************************
 663  *
 664  *  DESCRIPTION:
 665  *
 666  *      Allocates all resources needed for PCI/CardBus DMA operation
 667  *
 668  *  PARAMETERS:
 669  *
 670  *      pdev - a pointer to the device's pci_dev structure
 671  *      lp  - the device's private adapter structure
 672  *
 673  *  RETURNS:
 674  *
 675  *      0 on success
 676  *      errno value otherwise
 677  *
 678  ******************************************************************************/
 679 int wl_pci_dma_alloc( struct pci_dev *pdev, struct wl_private *lp )
 680 {
 681     int i;
 682     int status = 0;
 683     /*------------------------------------------------------------------------*/
 684
 685     DBG_FUNC( "wl_pci_dma_alloc" );
 686     DBG_ENTER( DbgInfo );
 687
 688 //     lp->dma.tx_rsc_ind = lp->dma.rx_rsc_ind = 0;
 689 //
 690 //     /* Alloc for the Tx chain and its reclaim descriptor */
 691 //     for( i = 0; i < NUM_TX_DESC; i++ ) {
 692 //         status = wl_pci_dma_alloc_tx_packet( pdev, lp, &lp->dma.tx_packet[i] );
 693 //         if( status == 0 ) {
 694 //             DBG_PRINT( "lp->dma.tx_packet[%d] :                 0x%p\n", i, lp->dma.tx_packet[i] );
 695 //             DBG_PRINT( "lp->dma.tx_packet[%d]->next_desc_addr : 0x%p\n", i, lp->dma.tx_packet[i]->next_desc_addr );
 696 //             lp->dma.tx_rsc_ind++;
 697 //         } else {
 698 //             DBG_ERROR( DbgInfo, "Could not alloc DMA Tx Packet\n" );
 699 //             break;
 700 //         }
 701 //     }
 702 //     if( status == 0 ) {
 703 //         status = wl_pci_dma_alloc_desc( pdev, lp, &lp->dma.tx_reclaim_desc );
 704 //         DBG_PRINT( "lp->dma.tx_reclaim_desc: 0x%p\n", lp->dma.tx_reclaim_desc );
 705 //     }
 706 //     /* Alloc for the Rx chain and its reclaim descriptor */
 707 //     if( status == 0 ) {
 708 //         for( i = 0; i < NUM_RX_DESC; i++ ) {
 709 //             status = wl_pci_dma_alloc_rx_packet( pdev, lp, &lp->dma.rx_packet[i] );
 710 //             if( status == 0 ) {
 711 //                 DBG_PRINT( "lp->dma.rx_packet[%d]                 : 0x%p\n", i, lp->dma.rx_packet[i] );
 712 //                 DBG_PRINT( "lp->dma.rx_packet[%d]->next_desc_addr : 0x%p\n", i, lp->dma.rx_packet[i]->next_desc_addr );
 713 //                 lp->dma.rx_rsc_ind++;
 714 //             } else {
 715 //                 DBG_ERROR( DbgInfo, "Could not alloc DMA Rx Packet\n" );
 716 //                 break;
 717 //             }
 718 //         }
 719 //     }
 720 //     if( status == 0 ) {
 721 //         status = wl_pci_dma_alloc_desc( pdev, lp, &lp->dma.rx_reclaim_desc );
 722 //         DBG_PRINT( "lp->dma.rx_reclaim_desc: 0x%p\n", lp->dma.rx_reclaim_desc );
 723 //     }
 724 //     /* Store status, as host should not call HCF functions if this fails */
 725 //     lp->dma.status = status;  //;?all useages of dma.status have been commented out
 726 //     DBG_LEAVE( DbgInfo );
 727     return status;
 728 } // wl_pci_dma_alloc
 729 /*============================================================================*/
 730
 731 /*******************************************************************************
 732  *      wl_pci_dma_free()
 733  *******************************************************************************
 734  *
 735  *  DESCRIPTION:
 736  *
 737  *      Deallocated all resources needed for PCI/CardBus DMA operation
 738  *
 739  *  PARAMETERS:
 740  *
 741  *      pdev - a pointer to the device's pci_dev structure
 742  *      lp  - the device's private adapter structure
 743  *
 744  *  RETURNS:
 745  *
 746  *      0 on success
 747  *      errno value otherwise
 748  *
 749  ******************************************************************************/
 750 int wl_pci_dma_free( struct pci_dev *pdev, struct wl_private *lp )
 751 {
 752     int i;
 753     int status = 0;
 754     /*------------------------------------------------------------------------*/
 755
 756     DBG_FUNC( "wl_pci_dma_free" );
 757     DBG_ENTER( DbgInfo );
 758
 759     /* Reclaim all Rx packets that were handed over to the HCF */
 760     /* Do I need to do this? Before this free is called, I've already disabled
 761        the port which will call wl_pci_dma_hcf_reclaim */
 762     //if( lp->dma.status == 0 )
 763     //{
 764     //    wl_pci_dma_hcf_reclaim( lp );
 765     //}
 766
 767     /* Free everything needed for DMA Rx */
 768     for( i = 0; i < NUM_RX_DESC; i++ ) {
 769         if( lp->dma.rx_packet[i] ) {
 770             status = wl_pci_dma_free_rx_packet( pdev, lp, &lp->dma.rx_packet[i] );
 771             if( status != 0 ) {
 772                 DBG_WARNING( DbgInfo, "Problem freeing Rx packet\n" );
 773             }
 774         }
 775     }
 776     lp->dma.rx_rsc_ind = 0;
 777
 778     if( lp->dma.rx_reclaim_desc ) {
 779         status = wl_pci_dma_free_desc( pdev, lp, &lp->dma.rx_reclaim_desc );
 780         if( status != 0 ) {
 781             DBG_WARNING( DbgInfo, "Problem freeing Rx reclaim descriptor\n" );
 782         }
 783     }
 784
 785     /* Free everything needed for DMA Tx */
 786     for( i = 0; i < NUM_TX_DESC; i++ ) {
 787         if( lp->dma.tx_packet[i] ) {
 788             status = wl_pci_dma_free_tx_packet( pdev, lp, &lp->dma.tx_packet[i] );
 789             if( status != 0 ) {
 790                 DBG_WARNING( DbgInfo, "Problem freeing Tx packet\n" );
 791             }
 792         }
 793     }
 794     lp->dma.tx_rsc_ind = 0;
 795
 796     if( lp->dma.tx_reclaim_desc ) {
 797         status = wl_pci_dma_free_desc( pdev, lp, &lp->dma.tx_reclaim_desc );
 798         if( status != 0 ) {
 799             DBG_WARNING( DbgInfo, "Problem freeing Tx reclaim descriptor\n" );
 800         }
 801     }
 802
 803     DBG_LEAVE( DbgInfo );
 804     return status;
 805 } // wl_pci_dma_free
 806
 807 /*============================================================================*/
 808
 809 /*******************************************************************************
 810  *      wl_pci_dma_alloc_tx_packet()
 811  *******************************************************************************
 812  *
 813  *  DESCRIPTION:
 814  *
 815  *      Allocates a single Tx packet, consisting of several descriptors and
 816  *      buffers. Data to transmit is first copied into the 'payload' buffer
 817  *      before being transmitted.
 818  *
 819  *  PARAMETERS:
 820  *
 821  *      pdev    - a pointer to the device's pci_dev structure
 822  *      lp      - the device's private adapter structure
 823  *      desc    - a pointer which will reference the descriptor to be alloc'd.
 824  *
 825  *  RETURNS:
 826  *
 827  *      0 on success
 828  *      errno value otherwise
 829  *
 830  ******************************************************************************/
 831 int wl_pci_dma_alloc_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
 832                                 DESC_STRCT **desc )
 833 {
 834 //     int status = 0;
 835 //     /*------------------------------------------------------------------------*/
 836 //
 837 //     if( desc == NULL ) {
 838 //         status = -EFAULT;
 839 //     }
 840 //     if( status == 0 ) {
 841 //         status = wl_pci_dma_alloc_desc_and_buf( pdev, lp, desc,
 842 //                                                 HCF_DMA_TX_BUF1_SIZE );
 843 //
 844 //         if( status == 0 ) {
 845 //             status = wl_pci_dma_alloc_desc_and_buf( pdev, lp,
 846 //                                                     &( (*desc)->next_desc_addr ),
 847 //                                                     HCF_MAX_PACKET_SIZE );
 848 //         }
 849 //     }
 850 //     if( status == 0 ) {
 851 //         (*desc)->next_desc_phys_addr = (*desc)->next_desc_addr->desc_phys_addr;
 852 //     }
 853 //     return status;
 854 } // wl_pci_dma_alloc_tx_packet
 855 /*============================================================================*/
 856
 857 /*******************************************************************************
 858  *      wl_pci_dma_free_tx_packet()
 859  *******************************************************************************
 860  *
 861  *  DESCRIPTION:
 862  *
 863  *      Frees a single Tx packet, described in the corresponding alloc function.
 864  *
 865  *  PARAMETERS:
 866  *
 867  *      pdev    - a pointer to the device's pci_dev structure
 868  *      lp      - the device's private adapter structure
 869  *      desc    - a pointer which will reference the descriptor to be alloc'd.
 870  *
 871  *  RETURNS:
 872  *
 873  *      0 on success
 874  *      errno value otherwise
 875  *
 876  ******************************************************************************/
 877 int wl_pci_dma_free_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
 878                                 DESC_STRCT **desc )
 879 {
 880     int status = 0;
 881     /*------------------------------------------------------------------------*/
 882
 883     if( *desc == NULL ) {
 884         DBG_PRINT( "Null descriptor\n" );
 885         status = -EFAULT;
 886     }
 887         //;?the "limited" NDIS strategy, assuming a frame consists ALWAYS out of 2
 888         //descriptors, make this robust
 889     if( status == 0 && (*desc)->next_desc_addr ) {
 890         status = wl_pci_dma_free_desc_and_buf( pdev, lp, &(*desc)->next_desc_addr );
 891     }
 892     if( status == 0 ) {
 893         status = wl_pci_dma_free_desc_and_buf( pdev, lp, desc );
 894     }
 895     return status;
 896 } // wl_pci_dma_free_tx_packet
 897 /*============================================================================*/
 898
 899 /*******************************************************************************
 900  *      wl_pci_dma_alloc_rx_packet()
 901  *******************************************************************************
 902  *
 903  *  DESCRIPTION:
 904  *
 905  *      Allocates a single Rx packet, consisting of two descriptors and one
 906  *      contiguous buffer. THe buffer starts with the hermes-specific header.
 907  *      One descriptor points at the start, the other at offset 0x3a of the
 908  *      buffer.
 909  *
 910  *  PARAMETERS:
 911  *
 912  *      pdev    - a pointer to the device's pci_dev structure
 913  *      lp      - the device's private adapter structure
 914  *      desc    - a pointer which will reference the descriptor to be alloc'd.
 915  *
 916  *  RETURNS:
 917  *
 918  *      0 on success
 919  *      errno value otherwise
 920  *
 921  ******************************************************************************/
 922 int wl_pci_dma_alloc_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
 923                                 DESC_STRCT **desc )
 924 {
 925     int         status = 0;
 926     DESC_STRCT  *p;
 927     /*------------------------------------------------------------------------*/
 928
 929 //     if( desc == NULL ) {
 930 //         status = -EFAULT;
 931 //     }
 932 //      //;?the "limited" NDIS strategy, assuming a frame consists ALWAYS out of 2
 933 //      //descriptors, make this robust
 934 //     if( status == 0 ) {
 935 //         status = wl_pci_dma_alloc_desc( pdev, lp, desc );
 936 //      }
 937 //     if( status == 0 ) {
 938 //         status = wl_pci_dma_alloc_buf( pdev, lp, *desc, HCF_MAX_PACKET_SIZE );
 939 //     }
 940 //     if( status == 0 ) {
 941 //         status = wl_pci_dma_alloc_desc( pdev, lp, &p );
 942 //     }
 943 //     if( status == 0 ) {
 944 //         /* Size of 1st descriptor becomes 0x3a bytes */
 945 //         SET_BUF_SIZE( *desc, HCF_DMA_RX_BUF1_SIZE );
 946 //
 947 //         /* Make 2nd descriptor point at offset 0x3a of the buffer */
 948 //         SET_BUF_SIZE( p, ( HCF_MAX_PACKET_SIZE - HCF_DMA_RX_BUF1_SIZE ));
 949 //         p->buf_addr       = (*desc)->buf_addr + HCF_DMA_RX_BUF1_SIZE;
 950 //         p->buf_phys_addr  = (*desc)->buf_phys_addr + HCF_DMA_RX_BUF1_SIZE;
 951 //         p->next_desc_addr = NULL;
 952 //
 953 //         /* Chain 2nd descriptor to 1st descriptor */
 954 //         (*desc)->next_desc_addr      = p;
 955 //         (*desc)->next_desc_phys_addr = p->desc_phys_addr;
 956 //     }
 957
 958     return status;
 959 } // wl_pci_dma_alloc_rx_packet
 960 /*============================================================================*/
 961
 962 /*******************************************************************************
 963  *      wl_pci_dma_free_rx_packet()
 964  *******************************************************************************
 965  *
 966  *  DESCRIPTION:
 967  *
 968  *      Frees a single Rx packet, described in the corresponding alloc function.
 969  *
 970  *  PARAMETERS:
 971  *
 972  *      pdev    - a pointer to the device's pci_dev structure
 973  *      lp      - the device's private adapter structure
 974  *      desc    - a pointer which will reference the descriptor to be alloc'd.
 975  *
 976  *  RETURNS:
 977  *
 978  *      0 on success
 979  *      errno value otherwise
 980  *
 981  ******************************************************************************/
 982 int wl_pci_dma_free_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
 983                                 DESC_STRCT **desc )
 984 {
 985     int status = 0;
 986     DESC_STRCT *p;
 987     /*------------------------------------------------------------------------*/
 988
 989     if( *desc == NULL ) {
 990         status = -EFAULT;
 991     }
 992     if( status == 0 ) {
 993         p = (*desc)->next_desc_addr;
 994
 995         /* Free the 2nd descriptor */
 996         if( p != NULL ) {
 997             p->buf_addr      = NULL;
 998             p->buf_phys_addr = 0;
 999
1000             status = wl_pci_dma_free_desc( pdev, lp, &p );
1001         }
1002     }
1003
1004     /* Free the buffer and 1st descriptor */
1005     if( status == 0 ) {
1006         SET_BUF_SIZE( *desc, HCF_MAX_PACKET_SIZE );
1007         status = wl_pci_dma_free_desc_and_buf( pdev, lp, desc );
1008     }
1009     return status;
1010 } // wl_pci_dma_free_rx_packet
1011 /*============================================================================*/
1012
1013 /*******************************************************************************
1014  *      wl_pci_dma_alloc_desc_and_buf()
1015  *******************************************************************************
1016  *
1017  *  DESCRIPTION:
1018  *
1019  *      Allocates a DMA descriptor and buffer, and associates them with one
1020  *      another.
1021  *
1022  *  PARAMETERS:
1023  *
1024  *      pdev  - a pointer to the device's pci_dev structure
1025  *      lp    - the device's private adapter structure
1026  *      desc  - a pointer which will reference the descriptor to be alloc'd
1027  *
1028  *  RETURNS:
1029  *
1030  *      0 on success
1031  *      errno value otherwise
1032  *
1033  ******************************************************************************/
1034 int wl_pci_dma_alloc_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
1035                                    DESC_STRCT **desc, int size )
1036 {
1037     int status = 0;
1038     /*------------------------------------------------------------------------*/
1039
1040 //     if( desc == NULL ) {
1041 //         status = -EFAULT;
1042 //     }
1043 //     if( status == 0 ) {
1044 //         status = wl_pci_dma_alloc_desc( pdev, lp, desc );
1045 //
1046 //         if( status == 0 ) {
1047 //             status = wl_pci_dma_alloc_buf( pdev, lp, *desc, size );
1048 //         }
1049 //     }
1050     return status;
1051 } // wl_pci_dma_alloc_desc_and_buf
1052 /*============================================================================*/
1053
1054 /*******************************************************************************
1055  *      wl_pci_dma_free_desc_and_buf()
1056  *******************************************************************************
1057  *
1058  *  DESCRIPTION:
1059  *
1060  *      Frees a DMA descriptor and associated buffer.
1061  *
1062  *  PARAMETERS:
1063  *
1064  *      pdev  - a pointer to the device's pci_dev structure
1065  *      lp    - the device's private adapter structure
1066  *      desc  - a pointer which will reference the descriptor to be alloc'd
1067  *
1068  *  RETURNS:
1069  *
1070  *      0 on success
1071  *      errno value otherwise
1072  *
1073  ******************************************************************************/
1074 int wl_pci_dma_free_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
1075                                    DESC_STRCT **desc )
1076 {
1077     int status = 0;
1078     /*------------------------------------------------------------------------*/
1079
1080     if( desc == NULL ) {
1081         status = -EFAULT;
1082     }
1083     if( status == 0 && *desc == NULL ) {
1084         status = -EFAULT;
1085     }
1086     if( status == 0 ) {
1087         status = wl_pci_dma_free_buf( pdev, lp, *desc );
1088
1089         if( status == 0 ) {
1090             status = wl_pci_dma_free_desc( pdev, lp, desc );
1091         }
1092     }
1093     return status;
1094 } // wl_pci_dma_free_desc_and_buf
1095 /*============================================================================*/
1096
1097 /*******************************************************************************
1098  *      wl_pci_dma_alloc_desc()
1099  *******************************************************************************
1100  *
1101  *  DESCRIPTION:
1102  *
1103  *      Allocates one DMA descriptor in cache coherent memory.
1104  *
1105  *  PARAMETERS:
1106  *
1107  *      pdev - a pointer to the device's pci_dev structure
1108  *      lp  - the device's private adapter structure
1109  *
1110  *  RETURNS:
1111  *
1112  *      0 on success
1113  *      errno value otherwise
1114  *
1115  ******************************************************************************/
1116 int wl_pci_dma_alloc_desc( struct pci_dev *pdev, struct wl_private *lp,
1117                            DESC_STRCT **desc )
1118 {
1119 //     int         status = 0;
1120 //     dma_addr_t  pa;
1121 //     /*------------------------------------------------------------------------*/
1122 //
1123 //     DBG_FUNC( "wl_pci_dma_alloc_desc" );
1124 //     DBG_ENTER( DbgInfo );
1125 //
1126 //     if( desc == NULL ) {
1127 //         status = -EFAULT;
1128 //     }
1129 //     if( status == 0 ) {
1130 //         *desc = pci_alloc_consistent( pdev, sizeof( DESC_STRCT ), &pa );
1131 //     }
1132 //     if( *desc == NULL ) {
1133 //         DBG_ERROR( DbgInfo, "pci_alloc_consistent() failed\n" );
1134 //         status = -ENOMEM;
1135 //     } else {
1136 //         memset( *desc, 0, sizeof( DESC_STRCT ));
1137 //         (*desc)->desc_phys_addr = cpu_to_le32( pa );
1138 //     }
1139 //     DBG_LEAVE( DbgInfo );
1140 //     return status;
1141 } // wl_pci_dma_alloc_desc
1142 /*============================================================================*/
1143
1144 /*******************************************************************************
1145  *      wl_pci_dma_free_desc()
1146  *******************************************************************************
1147  *
1148  *  DESCRIPTION:
1149  *
1150  *      Frees one DMA descriptor in cache coherent memory.
1151  *
1152  *  PARAMETERS:
1153  *
1154  *      pdev - a pointer to the device's pci_dev structure
1155  *      lp  - the device's private adapter structure
1156  *
1157  *  RETURNS:
1158  *
1159  *      0 on success
1160  *      errno value otherwise
1161  *
1162  ******************************************************************************/
1163 int wl_pci_dma_free_desc( struct pci_dev *pdev, struct wl_private *lp,
1164                            DESC_STRCT **desc )
1165 {
1166     int         status = 0;
1167     /*------------------------------------------------------------------------*/
1168
1169     if( *desc == NULL ) {
1170         status = -EFAULT;
1171     }
1172     if( status == 0 ) {
1173         pci_free_consistent( pdev, sizeof( DESC_STRCT ), *desc,
1174                              (*desc)->desc_phys_addr );
1175     }
1176     *desc = NULL;
1177     return status;
1178 } // wl_pci_dma_free_desc
1179 /*============================================================================*/
1180
1181 /*******************************************************************************
1182  *      wl_pci_dma_alloc_buf()
1183  *******************************************************************************
1184  *
1185  *  DESCRIPTION:
1186  *
1187  *      Allocates one DMA buffer in cache coherent memory, and associates a DMA
1188  *      descriptor with this buffer.
1189  *
1190  *  PARAMETERS:
1191  *
1192  *      pdev - a pointer to the device's pci_dev structure
1193  *      lp  - the device's private adapter structure
1194  *
1195  *  RETURNS:
1196  *
1197  *      0 on success
1198  *      errno value otherwise
1199  *
1200  ******************************************************************************/
1201 int wl_pci_dma_alloc_buf( struct pci_dev *pdev, struct wl_private *lp,
1202                           DESC_STRCT *desc, int size )
1203 {
1204     int         status = 0;
1205     dma_addr_t  pa;
1206     /*------------------------------------------------------------------------*/
1207
1208 //     DBG_FUNC( "wl_pci_dma_alloc_buf" );
1209 //     DBG_ENTER( DbgInfo );
1210 //
1211 //     if( desc == NULL ) {
1212 //         status = -EFAULT;
1213 //     }
1214 //     if( status == 0 && desc->buf_addr != NULL ) {
1215 //         status = -EFAULT;
1216 //     }
1217 //     if( status == 0 ) {
1218 //         desc->buf_addr = pci_alloc_consistent( pdev, size, &pa );
1219 //     }
1220 //     if( desc->buf_addr == NULL ) {
1221 //         DBG_ERROR( DbgInfo, "pci_alloc_consistent() failed\n" );
1222 //         status = -ENOMEM;
1223 //     } else {
1224 //         desc->buf_phys_addr = cpu_to_le32( pa );
1225 //         SET_BUF_SIZE( desc, size );
1226 //     }
1227 //     DBG_LEAVE( DbgInfo );
1228     return status;
1229 } // wl_pci_dma_alloc_buf
1230 /*============================================================================*/
1231
1232 /*******************************************************************************
1233  *      wl_pci_dma_free_buf()
1234  *******************************************************************************
1235  *
1236  *  DESCRIPTION:
1237  *
1238  *      Allocates one DMA buffer in cache coherent memory, and associates a DMA
1239  *      descriptor with this buffer.
1240  *
1241  *  PARAMETERS:
1242  *
1243  *      pdev - a pointer to the device's pci_dev structure
1244  *      lp  - the device's private adapter structure
1245  *
1246  *  RETURNS:
1247  *
1248  *      0 on success
1249  *      errno value otherwise
1250  *
1251  ******************************************************************************/
1252 int wl_pci_dma_free_buf( struct pci_dev *pdev, struct wl_private *lp,
1253                          DESC_STRCT *desc )
1254 {
1255     int         status = 0;
1256     /*------------------------------------------------------------------------*/
1257
1258     if( desc == NULL ) {
1259         status = -EFAULT;
1260     }
1261     if( status == 0 && desc->buf_addr == NULL ) {
1262         status = -EFAULT;
1263     }
1264     if( status == 0 ) {
1265         pci_free_consistent( pdev, GET_BUF_SIZE( desc ), desc->buf_addr,
1266                              desc->buf_phys_addr );
1267
1268         desc->buf_addr = 0;
1269         desc->buf_phys_addr = 0;
1270         SET_BUF_SIZE( desc, 0 );
1271     }
1272     return status;
1273 } // wl_pci_dma_free_buf
1274 /*============================================================================*/
1275
1276 /*******************************************************************************
1277  *      wl_pci_dma_hcf_supply()
1278  *******************************************************************************
1279  *
1280  *  DESCRIPTION:
1281  *
1282  *      Supply HCF with DMA-related resources. These consist of:
1283  *          - buffers and descriptors for receive purposes
1284  *          - one 'reclaim' descriptor for the transmit path, used to fulfill a
1285  *            certain H25 DMA engine requirement
1286  *          - one 'reclaim' descriptor for the receive path, used to fulfill a
1287  *            certain H25 DMA engine requirement
1288  *
1289  *      This function is called at start-of-day or at re-initialization.
1290  *
1291  *  PARAMETERS:
1292  *
1293  *      lp  - the device's private adapter structure
1294  *
1295  *  RETURNS:
1296  *
1297  *      0 on success
1298  *      errno value otherwise
1299  *
1300  ******************************************************************************/
1301 void wl_pci_dma_hcf_supply( struct wl_private *lp )
1302 {
1303     int i;
1304     /*------------------------------------------------------------------------*/
1305
1306     DBG_FUNC( "wl_pci_dma_hcf_supply" );
1307     DBG_ENTER( DbgInfo );
1308
1309     //if( lp->dma.status == 0 );
1310     //{
1311         /* Hand over the Rx/Tx reclaim descriptors to the HCF */
1312         if( lp->dma.tx_reclaim_desc ) {
1313             DBG_PRINT( "lp->dma.tx_reclaim_desc: 0x%p\n", lp->dma.tx_reclaim_desc );
1314             hcf_dma_tx_put( &lp->hcfCtx, lp->dma.tx_reclaim_desc, 0 );
1315             lp->dma.tx_reclaim_desc = NULL;
1316             DBG_PRINT( "lp->dma.tx_reclaim_desc: 0x%p\n", lp->dma.tx_reclaim_desc );
1317         }
1318         if( lp->dma.rx_reclaim_desc ) {
1319             DBG_PRINT( "lp->dma.rx_reclaim_desc: 0x%p\n", lp->dma.rx_reclaim_desc );
1320             hcf_dma_rx_put( &lp->hcfCtx, lp->dma.rx_reclaim_desc );
1321             lp->dma.rx_reclaim_desc = NULL;
1322             DBG_PRINT( "lp->dma.rx_reclaim_desc: 0x%p\n", lp->dma.rx_reclaim_desc );
1323         }
1324         /* Hand over the Rx descriptor chain to the HCF */
1325         for( i = 0; i < NUM_RX_DESC; i++ ) {
1326             DBG_PRINT( "lp->dma.rx_packet[%d]:    0x%p\n", i, lp->dma.rx_packet[i] );
1327             hcf_dma_rx_put( &lp->hcfCtx, lp->dma.rx_packet[i] );
1328             lp->dma.rx_packet[i] = NULL;
1329             DBG_PRINT( "lp->dma.rx_packet[%d]:    0x%p\n", i, lp->dma.rx_packet[i] );
1330         }
1331     //}
1332
1333     DBG_LEAVE( DbgInfo );
1334     return;
1335 } // wl_pci_dma_hcf_supply
1336 /*============================================================================*/
1337
1338 /*******************************************************************************
1339  *      wl_pci_dma_hcf_reclaim()
1340  *******************************************************************************
1341  *
1342  *  DESCRIPTION:
1343  *
1344  *      Return DMA-related resources from the HCF. These consist of:
1345  *          - buffers and descriptors for receive purposes
1346  *          - buffers and descriptors for transmit purposes
1347  *          - one 'reclaim' descriptor for the transmit path, used to fulfill a
1348  *            certain H25 DMA engine requirement
1349  *          - one 'reclaim' descriptor for the receive path, used to fulfill a
1350  *            certain H25 DMA engine requirement
1351  *
1352  *      This function is called at end-of-day or at re-initialization.
1353  *
1354  *  PARAMETERS:
1355  *
1356  *      lp  - the device's private adapter structure
1357  *
1358  *  RETURNS:
1359  *
1360  *      0 on success
1361  *      errno value otherwise
1362  *
1363  ******************************************************************************/
1364 void wl_pci_dma_hcf_reclaim( struct wl_private *lp )
1365 {
1366     int i;
1367     /*------------------------------------------------------------------------*/
1368
1369     DBG_FUNC( "wl_pci_dma_hcf_reclaim" );
1370     DBG_ENTER( DbgInfo );
1371
1372     wl_pci_dma_hcf_reclaim_rx( lp );
1373     for( i = 0; i < NUM_RX_DESC; i++ ) {
1374         DBG_PRINT( "rx_packet[%d] 0x%p\n", i, lp->dma.rx_packet[i] );
1375 //         if( lp->dma.rx_packet[i] == NULL ) {
1376 //             DBG_PRINT( "wl_pci_dma_hcf_reclaim: rx_packet[%d] NULL\n", i );
1377 //         }
1378     }
1379
1380     wl_pci_dma_hcf_reclaim_tx( lp );
1381     for( i = 0; i < NUM_TX_DESC; i++ ) {
1382         DBG_PRINT( "tx_packet[%d] 0x%p\n", i, lp->dma.tx_packet[i] );
1383 //         if( lp->dma.tx_packet[i] == NULL ) {
1384 //             DBG_PRINT( "wl_pci_dma_hcf_reclaim: tx_packet[%d] NULL\n", i );
1385 //         }
1386      }
1387
1388     DBG_LEAVE( DbgInfo );
1389     return;
1390 } // wl_pci_dma_hcf_reclaim
1391 /*============================================================================*/
1392
1393 /*******************************************************************************
1394  *      wl_pci_dma_hcf_reclaim_rx()
1395  *******************************************************************************
1396  *
1397  *  DESCRIPTION:
1398  *
1399  *      Reclaim Rx packets that have already been processed by the HCF.
1400  *
1401  *  PARAMETERS:
1402  *
1403  *      lp  - the device's private adapter structure
1404  *
1405  *  RETURNS:
1406  *
1407  *      0 on success
1408  *      errno value otherwise
1409  *
1410  ******************************************************************************/
1411 void wl_pci_dma_hcf_reclaim_rx( struct wl_private *lp )
1412 {
1413     int         i;
1414     DESC_STRCT *p;
1415     /*------------------------------------------------------------------------*/
1416
1417     DBG_FUNC( "wl_pci_dma_hcf_reclaim_rx" );
1418     DBG_ENTER( DbgInfo );
1419
1420     //if( lp->dma.status == 0 )
1421     //{
1422         while ( ( p = hcf_dma_rx_get( &lp->hcfCtx ) ) != NULL ) {
1423             if( p && p->buf_addr == NULL ) {
1424                 /* A reclaim descriptor is being given back by the HCF. Reclaim
1425                    descriptors have a NULL buf_addr */
1426                 lp->dma.rx_reclaim_desc = p;
1427                 DBG_PRINT( "reclaim_descriptor: 0x%p\n", p );
1428                 continue;
1429             }
1430             for( i = 0; i < NUM_RX_DESC; i++ ) {
1431                 if( lp->dma.rx_packet[i] == NULL ) {
1432                     break;
1433                 }
1434             }
1435             /* An Rx buffer descriptor is being given back by the HCF */
1436             lp->dma.rx_packet[i] = p;
1437             lp->dma.rx_rsc_ind++;
1438                 DBG_PRINT( "rx_packet[%d] 0x%p\n", i, lp->dma.rx_packet[i] );
1439         }
1440     //}
1441     DBG_LEAVE( DbgInfo );
1442 } // wl_pci_dma_hcf_reclaim_rx
1443 /*============================================================================*/
1444
1445 /*******************************************************************************
1446  *      wl_pci_dma_get_tx_packet()
1447  *******************************************************************************
1448  *
1449  *  DESCRIPTION:
1450  *
1451  *      Obtains a Tx descriptor from the chain to use for Tx.
1452  *
1453  *  PARAMETERS:
1454  *
1455  *      lp - a pointer to the device's wl_private structure.
1456  *
1457  *  RETURNS:
1458  *
1459  *      A pointer to the retrieved descriptor
1460  *
1461  ******************************************************************************/
1462 DESC_STRCT * wl_pci_dma_get_tx_packet( struct wl_private *lp )
1463 {
1464     int i;
1465     DESC_STRCT *desc = NULL;
1466     /*------------------------------------------------------------------------*/
1467
1468     for( i = 0; i < NUM_TX_DESC; i++ ) {
1469         if( lp->dma.tx_packet[i] ) {
1470             break;
1471         }
1472     }
1473
1474     if( i != NUM_TX_DESC ) {
1475         desc = lp->dma.tx_packet[i];
1476
1477         lp->dma.tx_packet[i] = NULL;
1478         lp->dma.tx_rsc_ind--;
1479
1480         memset( desc->buf_addr, 0, HCF_DMA_TX_BUF1_SIZE );
1481     }
1482
1483     return desc;
1484 } // wl_pci_dma_get_tx_packet
1485 /*============================================================================*/
1486
1487 /*******************************************************************************
1488  *      wl_pci_dma_put_tx_packet()
1489  *******************************************************************************
1490  *
1491  *  DESCRIPTION:
1492  *
1493  *      Returns a Tx descriptor to the chain.
1494  *
1495  *  PARAMETERS:
1496  *
1497  *      lp   - a pointer to the device's wl_private structure.
1498  *      desc - a pointer to the descriptor to return.
1499  *
1500  *  RETURNS:
1501  *
1502  *      N/A
1503  *
1504  ******************************************************************************/
1505 void wl_pci_dma_put_tx_packet( struct wl_private *lp, DESC_STRCT *desc )
1506 {
1507     int i;
1508     /*------------------------------------------------------------------------*/
1509
1510     for( i = 0; i < NUM_TX_DESC; i++ ) {
1511         if( lp->dma.tx_packet[i] == NULL ) {
1512             break;
1513         }
1514     }
1515
1516     if( i != NUM_TX_DESC ) {
1517         lp->dma.tx_packet[i] = desc;
1518         lp->dma.tx_rsc_ind++;
1519     }
1520 } // wl_pci_dma_put_tx_packet
1521 /*============================================================================*/
1522
1523 /*******************************************************************************
1524  *      wl_pci_dma_hcf_reclaim_tx()
1525  *******************************************************************************
1526  *
1527  *  DESCRIPTION:
1528  *
1529  *      Reclaim Tx packets that have either been processed by the HCF due to a
1530  *      port disable or a Tx completion.
1531  *
1532  *  PARAMETERS:
1533  *
1534  *      lp  - the device's private adapter structure
1535  *
1536  *  RETURNS:
1537  *
1538  *      0 on success
1539  *      errno value otherwise
1540  *
1541  ******************************************************************************/
1542 void wl_pci_dma_hcf_reclaim_tx( struct wl_private *lp )
1543 {
1544     int         i;
1545     DESC_STRCT *p;
1546     /*------------------------------------------------------------------------*/
1547
1548     DBG_FUNC( "wl_pci_dma_hcf_reclaim_tx" );
1549     DBG_ENTER( DbgInfo );
1550
1551     //if( lp->dma.status == 0 )
1552     //{
1553         while ( ( p = hcf_dma_tx_get( &lp->hcfCtx ) ) != NULL ) {
1554
1555             if( p != NULL && p->buf_addr == NULL ) {
1556                 /* A Reclaim descriptor is being given back by the HCF. Reclaim
1557                    descriptors have a NULL buf_addr */
1558                 lp->dma.tx_reclaim_desc = p;
1559                 DBG_PRINT( "reclaim_descriptor: 0x%p\n", p );
1560                 continue;
1561             }
1562             for( i = 0; i < NUM_TX_DESC; i++ ) {
1563                 if( lp->dma.tx_packet[i] == NULL ) {
1564                     break;
1565                 }
1566             }
1567             /* An Rx buffer descriptor is being given back by the HCF */
1568             lp->dma.tx_packet[i] = p;
1569             lp->dma.tx_rsc_ind++;
1570                 DBG_PRINT( "tx_packet[%d] 0x%p\n", i, lp->dma.tx_packet[i] );
1571         }
1572     //}
1573
1574     if( lp->netif_queue_on == FALSE ) {
1575         netif_wake_queue( lp->dev );
1576         WL_WDS_NETIF_WAKE_QUEUE( lp );
1577         lp->netif_queue_on = TRUE;
1578     }
1579     DBG_LEAVE( DbgInfo );
1580     return;
1581 } // wl_pci_dma_hcf_reclaim_tx
1582 /*============================================================================*/
1583 #endif  // ENABLE_DMA