drivers/net/pcnet32.c

   1 /* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */
   2 /*
   3  *      Copyright 1996-1999 Thomas Bogendoerfer
   4  *
   5  *      Derived from the lance driver written 1993,1994,1995 by Donald Becker.
   6  *
   7  *      Copyright 1993 United States Government as represented by the
   8  *      Director, National Security Agency.
   9  *
  10  *      This software may be used and distributed according to the terms
  11  *      of the GNU General Public License, incorporated herein by reference.
  12  *
  13  *      This driver is for PCnet32 and PCnetPCI based ethercards
  14  */
  15 /**************************************************************************
  16  *  23 Oct, 2000.
  17  *  Fixed a few bugs, related to running the controller in 32bit mode.
  18  *
  19  *  Carsten Langgaard, carstenl@mips.com
  20  *  Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
  21  *
  22  *************************************************************************/
  23
  24 #define DRV_NAME        "pcnet32"
  25 #ifdef CONFIG_PCNET32_NAPI
  26 #define DRV_VERSION     "1.33-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.33"
  29 #endif
  30 #define DRV_RELDATE     "27.Jun.2006"
  31 #define PFX             DRV_NAME ": "
  32
  33 static const char *const version =
  34     DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " tsbogend@alpha.franken.de\n";
  35
  36 #include <linux/module.h>
  37 #include <linux/kernel.h>
  38 #include <linux/string.h>
  39 #include <linux/errno.h>
  40 #include <linux/ioport.h>
  41 #include <linux/slab.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/pci.h>
  44 #include <linux/delay.h>
  45 #include <linux/init.h>
  46 #include <linux/ethtool.h>
  47 #include <linux/mii.h>
  48 #include <linux/crc32.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/skbuff.h>
  52 #include <linux/spinlock.h>
  53 #include <linux/moduleparam.h>
  54 #include <linux/bitops.h>
  55
  56 #include <asm/dma.h>
  57 #include <asm/io.h>
  58 #include <asm/uaccess.h>
  59 #include <asm/irq.h>
  60
  61 /*
  62  * PCI device identifiers for "new style" Linux PCI Device Drivers
  63  */
  64 static struct pci_device_id pcnet32_pci_tbl[] = {
  65         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE_HOME), },
  66         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE), },
  67
  68         /*
  69          * Adapters that were sold with IBM's RS/6000 or pSeries hardware have
  70          * the incorrect vendor id.
  71          */
  72         { PCI_DEVICE(PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_AMD_LANCE),
  73           .class = (PCI_CLASS_NETWORK_ETHERNET << 8), .class_mask = 0xffff00, },
  74
  75         { }     /* terminate list */
  76 };
  77
  78 MODULE_DEVICE_TABLE(pci, pcnet32_pci_tbl);
  79
  80 static int cards_found;
  81
  82 /*
  83  * VLB I/O addresses
  84  */
  85 static unsigned int pcnet32_portlist[] __initdata =
  86     { 0x300, 0x320, 0x340, 0x360, 0 };
  87
  88 static int pcnet32_debug = 0;
  89 static int tx_start = 1;        /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
  90 static int pcnet32vlb;          /* check for VLB cards ? */
  91
  92 static struct net_device *pcnet32_dev;
  93
  94 static int max_interrupt_work = 2;
  95 static int rx_copybreak = 200;
  96
  97 #define PCNET32_PORT_AUI      0x00
  98 #define PCNET32_PORT_10BT     0x01
  99 #define PCNET32_PORT_GPSI     0x02
 100 #define PCNET32_PORT_MII      0x03
 101
 102 #define PCNET32_PORT_PORTSEL  0x03
 103 #define PCNET32_PORT_ASEL     0x04
 104 #define PCNET32_PORT_100      0x40
 105 #define PCNET32_PORT_FD       0x80
 106
 107 #define PCNET32_DMA_MASK 0xffffffff
 108
 109 #define PCNET32_WATCHDOG_TIMEOUT (jiffies + (2 * HZ))
 110 #define PCNET32_BLINK_TIMEOUT   (jiffies + (HZ/4))
 111
 112 /*
 113  * table to translate option values from tulip
 114  * to internal options
 115  */
 116 static const unsigned char options_mapping[] = {
 117         PCNET32_PORT_ASEL,                      /*  0 Auto-select      */
 118         PCNET32_PORT_AUI,                       /*  1 BNC/AUI          */
 119         PCNET32_PORT_AUI,                       /*  2 AUI/BNC          */
 120         PCNET32_PORT_ASEL,                      /*  3 not supported    */
 121         PCNET32_PORT_10BT | PCNET32_PORT_FD,    /*  4 10baseT-FD       */
 122         PCNET32_PORT_ASEL,                      /*  5 not supported    */
 123         PCNET32_PORT_ASEL,                      /*  6 not supported    */
 124         PCNET32_PORT_ASEL,                      /*  7 not supported    */
 125         PCNET32_PORT_ASEL,                      /*  8 not supported    */
 126         PCNET32_PORT_MII,                       /*  9 MII 10baseT      */
 127         PCNET32_PORT_MII | PCNET32_PORT_FD,     /* 10 MII 10baseT-FD   */
 128         PCNET32_PORT_MII,                       /* 11 MII (autosel)    */
 129         PCNET32_PORT_10BT,                      /* 12 10BaseT          */
 130         PCNET32_PORT_MII | PCNET32_PORT_100,    /* 13 MII 100BaseTx    */
 131                                                 /* 14 MII 100BaseTx-FD */
 132         PCNET32_PORT_MII | PCNET32_PORT_100 | PCNET32_PORT_FD,
 133         PCNET32_PORT_ASEL                       /* 15 not supported    */
 134 };
 135
 136 static const char pcnet32_gstrings_test[][ETH_GSTRING_LEN] = {
 137         "Loopback test  (offline)"
 138 };
 139
 140 #define PCNET32_TEST_LEN (sizeof(pcnet32_gstrings_test) / ETH_GSTRING_LEN)
 141
 142 #define PCNET32_NUM_REGS 136
 143
 144 #define MAX_UNITS 8             /* More are supported, limit only on options */
 145 static int options[MAX_UNITS];
 146 static int full_duplex[MAX_UNITS];
 147 static int homepna[MAX_UNITS];
 148
 149 /*
 150  *                              Theory of Operation
 151  *
 152  * This driver uses the same software structure as the normal lance
 153  * driver. So look for a verbose description in lance.c. The differences
 154  * to the normal lance driver is the use of the 32bit mode of PCnet32
 155  * and PCnetPCI chips. Because these chips are 32bit chips, there is no
 156  * 16MB limitation and we don't need bounce buffers.
 157  */
 158
 159 /*
 160  * Set the number of Tx and Rx buffers, using Log_2(# buffers).
 161  * Reasonable default values are 4 Tx buffers, and 16 Rx buffers.
 162  * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
 163  */
 164 #ifndef PCNET32_LOG_TX_BUFFERS
 165 #define PCNET32_LOG_TX_BUFFERS          4
 166 #define PCNET32_LOG_RX_BUFFERS          5
 167 #define PCNET32_LOG_MAX_TX_BUFFERS      9       /* 2^9 == 512 */
 168 #define PCNET32_LOG_MAX_RX_BUFFERS      9
 169 #endif
 170
 171 #define TX_RING_SIZE            (1 << (PCNET32_LOG_TX_BUFFERS))
 172 #define TX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_TX_BUFFERS))
 173
 174 #define RX_RING_SIZE            (1 << (PCNET32_LOG_RX_BUFFERS))
 175 #define RX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_RX_BUFFERS))
 176
 177 #define PKT_BUF_SZ              1544
 178
 179 /* Offsets from base I/O address. */
 180 #define PCNET32_WIO_RDP         0x10
 181 #define PCNET32_WIO_RAP         0x12
 182 #define PCNET32_WIO_RESET       0x14
 183 #define PCNET32_WIO_BDP         0x16
 184
 185 #define PCNET32_DWIO_RDP        0x10
 186 #define PCNET32_DWIO_RAP        0x14
 187 #define PCNET32_DWIO_RESET      0x18
 188 #define PCNET32_DWIO_BDP        0x1C
 189
 190 #define PCNET32_TOTAL_SIZE      0x20
 191
 192 #define CSR0            0
 193 #define CSR0_INIT       0x1
 194 #define CSR0_START      0x2
 195 #define CSR0_STOP       0x4
 196 #define CSR0_TXPOLL     0x8
 197 #define CSR0_INTEN      0x40
 198 #define CSR0_IDON       0x0100
 199 #define CSR0_NORMAL     (CSR0_START | CSR0_INTEN)
 200 #define PCNET32_INIT_LOW        1
 201 #define PCNET32_INIT_HIGH       2
 202 #define CSR3            3
 203 #define CSR4            4
 204 #define CSR5            5
 205 #define CSR5_SUSPEND    0x0001
 206 #define CSR15           15
 207 #define PCNET32_MC_FILTER       8
 208
 209 #define PCNET32_79C970A 0x2621
 210
 211 /* The PCNET32 Rx and Tx ring descriptors. */
 212 struct pcnet32_rx_head {
 213         u32     base;
 214         s16     buf_length;     /* two`s complement of length */
 215         s16     status;
 216         u32     msg_length;
 217         u32     reserved;
 218 };
 219
 220 struct pcnet32_tx_head {
 221         u32     base;
 222         s16     length;         /* two`s complement of length */
 223         s16     status;
 224         u32     misc;
 225         u32     reserved;
 226 };
 227
 228 /* The PCNET32 32-Bit initialization block, described in databook. */
 229 struct pcnet32_init_block {
 230         u16     mode;
 231         u16     tlen_rlen;
 232         u8      phys_addr[6];
 233         u16     reserved;
 234         u32     filter[2];
 235         /* Receive and transmit ring base, along with extra bits. */
 236         u32     rx_ring;
 237         u32     tx_ring;
 238 };
 239
 240 /* PCnet32 access functions */
 241 struct pcnet32_access {
 242         u16     (*read_csr) (unsigned long, int);
 243         void    (*write_csr) (unsigned long, int, u16);
 244         u16     (*read_bcr) (unsigned long, int);
 245         void    (*write_bcr) (unsigned long, int, u16);
 246         u16     (*read_rap) (unsigned long);
 247         void    (*write_rap) (unsigned long, u16);
 248         void    (*reset) (unsigned long);
 249 };
 250
 251 /*
 252  * The first field of pcnet32_private is read by the ethernet device
 253  * so the structure should be allocated using pci_alloc_consistent().
 254  */
 255 struct pcnet32_private {
 256         struct pcnet32_init_block *init_block;
 257         /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
 258         struct pcnet32_rx_head  *rx_ring;
 259         struct pcnet32_tx_head  *tx_ring;
 260         dma_addr_t              init_dma_addr;/* DMA address of beginning of the init block,
 261                                    returned by pci_alloc_consistent */
 262         struct pci_dev          *pci_dev;
 263         const char              *name;
 264         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
 265         struct sk_buff          **tx_skbuff;
 266         struct sk_buff          **rx_skbuff;
 267         dma_addr_t              *tx_dma_addr;
 268         dma_addr_t              *rx_dma_addr;
 269         struct pcnet32_access   a;
 270         spinlock_t              lock;           /* Guard lock */
 271         unsigned int            cur_rx, cur_tx; /* The next free ring entry */
 272         unsigned int            rx_ring_size;   /* current rx ring size */
 273         unsigned int            tx_ring_size;   /* current tx ring size */
 274         unsigned int            rx_mod_mask;    /* rx ring modular mask */
 275         unsigned int            tx_mod_mask;    /* tx ring modular mask */
 276         unsigned short          rx_len_bits;
 277         unsigned short          tx_len_bits;
 278         dma_addr_t              rx_ring_dma_addr;
 279         dma_addr_t              tx_ring_dma_addr;
 280         unsigned int            dirty_rx,       /* ring entries to be freed. */
 281                                 dirty_tx;
 282
 283         struct net_device_stats stats;
 284         char                    tx_full;
 285         char                    phycount;       /* number of phys found */
 286         int                     options;
 287         unsigned int            shared_irq:1,   /* shared irq possible */
 288                                 dxsuflo:1,   /* disable transmit stop on uflo */
 289                                 mii:1;          /* mii port available */
 290         struct net_device       *next;
 291         struct mii_if_info      mii_if;
 292         struct timer_list       watchdog_timer;
 293         struct timer_list       blink_timer;
 294         u32                     msg_enable;     /* debug message level */
 295
 296         /* each bit indicates an available PHY */
 297         u32                     phymask;
 298         unsigned short          chip_version;   /* which variant this is */
 299 };
 300
 301 static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
 302 static int pcnet32_probe1(unsigned long, int, struct pci_dev *);
 303 static int pcnet32_open(struct net_device *);
 304 static int pcnet32_init_ring(struct net_device *);
 305 static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);
 306 static void pcnet32_tx_timeout(struct net_device *dev);
 307 static irqreturn_t pcnet32_interrupt(int, void *);
 308 static int pcnet32_close(struct net_device *);
 309 static struct net_device_stats *pcnet32_get_stats(struct net_device *);
 310 static void pcnet32_load_multicast(struct net_device *dev);
 311 static void pcnet32_set_multicast_list(struct net_device *);
 312 static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
 313 static void pcnet32_watchdog(struct net_device *);
 314 static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
 315 static void mdio_write(struct net_device *dev, int phy_id, int reg_num,
 316                        int val);
 317 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits);
 318 static void pcnet32_ethtool_test(struct net_device *dev,
 319                                  struct ethtool_test *eth_test, u64 * data);
 320 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1);
 321 static int pcnet32_phys_id(struct net_device *dev, u32 data);
 322 static void pcnet32_led_blink_callback(struct net_device *dev);
 323 static int pcnet32_get_regs_len(struct net_device *dev);
 324 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 325                              void *ptr);
 326 static void pcnet32_purge_tx_ring(struct net_device *dev);
 327 static int pcnet32_alloc_ring(struct net_device *dev, char *name);
 328 static void pcnet32_free_ring(struct net_device *dev);
 329 static void pcnet32_check_media(struct net_device *dev, int verbose);
 330
 331 static u16 pcnet32_wio_read_csr(unsigned long addr, int index)
 332 {
 333         outw(index, addr + PCNET32_WIO_RAP);
 334         return inw(addr + PCNET32_WIO_RDP);
 335 }
 336
 337 static void pcnet32_wio_write_csr(unsigned long addr, int index, u16 val)
 338 {
 339         outw(index, addr + PCNET32_WIO_RAP);
 340         outw(val, addr + PCNET32_WIO_RDP);
 341 }
 342
 343 static u16 pcnet32_wio_read_bcr(unsigned long addr, int index)
 344 {
 345         outw(index, addr + PCNET32_WIO_RAP);
 346         return inw(addr + PCNET32_WIO_BDP);
 347 }
 348
 349 static void pcnet32_wio_write_bcr(unsigned long addr, int index, u16 val)
 350 {
 351         outw(index, addr + PCNET32_WIO_RAP);
 352         outw(val, addr + PCNET32_WIO_BDP);
 353 }
 354
 355 static u16 pcnet32_wio_read_rap(unsigned long addr)
 356 {
 357         return inw(addr + PCNET32_WIO_RAP);
 358 }
 359
 360 static void pcnet32_wio_write_rap(unsigned long addr, u16 val)
 361 {
 362         outw(val, addr + PCNET32_WIO_RAP);
 363 }
 364
 365 static void pcnet32_wio_reset(unsigned long addr)
 366 {
 367         inw(addr + PCNET32_WIO_RESET);
 368 }
 369
 370 static int pcnet32_wio_check(unsigned long addr)
 371 {
 372         outw(88, addr + PCNET32_WIO_RAP);
 373         return (inw(addr + PCNET32_WIO_RAP) == 88);
 374 }
 375
 376 static struct pcnet32_access pcnet32_wio = {
 377         .read_csr = pcnet32_wio_read_csr,
 378         .write_csr = pcnet32_wio_write_csr,
 379         .read_bcr = pcnet32_wio_read_bcr,
 380         .write_bcr = pcnet32_wio_write_bcr,
 381         .read_rap = pcnet32_wio_read_rap,
 382         .write_rap = pcnet32_wio_write_rap,
 383         .reset = pcnet32_wio_reset
 384 };
 385
 386 static u16 pcnet32_dwio_read_csr(unsigned long addr, int index)
 387 {
 388         outl(index, addr + PCNET32_DWIO_RAP);
 389         return (inl(addr + PCNET32_DWIO_RDP) & 0xffff);
 390 }
 391
 392 static void pcnet32_dwio_write_csr(unsigned long addr, int index, u16 val)
 393 {
 394         outl(index, addr + PCNET32_DWIO_RAP);
 395         outl(val, addr + PCNET32_DWIO_RDP);
 396 }
 397
 398 static u16 pcnet32_dwio_read_bcr(unsigned long addr, int index)
 399 {
 400         outl(index, addr + PCNET32_DWIO_RAP);
 401         return (inl(addr + PCNET32_DWIO_BDP) & 0xffff);
 402 }
 403
 404 static void pcnet32_dwio_write_bcr(unsigned long addr, int index, u16 val)
 405 {
 406         outl(index, addr + PCNET32_DWIO_RAP);
 407         outl(val, addr + PCNET32_DWIO_BDP);
 408 }
 409
 410 static u16 pcnet32_dwio_read_rap(unsigned long addr)
 411 {
 412         return (inl(addr + PCNET32_DWIO_RAP) & 0xffff);
 413 }
 414
 415 static void pcnet32_dwio_write_rap(unsigned long addr, u16 val)
 416 {
 417         outl(val, addr + PCNET32_DWIO_RAP);
 418 }
 419
 420 static void pcnet32_dwio_reset(unsigned long addr)
 421 {
 422         inl(addr + PCNET32_DWIO_RESET);
 423 }
 424
 425 static int pcnet32_dwio_check(unsigned long addr)
 426 {
 427         outl(88, addr + PCNET32_DWIO_RAP);
 428         return ((inl(addr + PCNET32_DWIO_RAP) & 0xffff) == 88);
 429 }
 430
 431 static struct pcnet32_access pcnet32_dwio = {
 432         .read_csr = pcnet32_dwio_read_csr,
 433         .write_csr = pcnet32_dwio_write_csr,
 434         .read_bcr = pcnet32_dwio_read_bcr,
 435         .write_bcr = pcnet32_dwio_write_bcr,
 436         .read_rap = pcnet32_dwio_read_rap,
 437         .write_rap = pcnet32_dwio_write_rap,
 438         .reset = pcnet32_dwio_reset
 439 };
 440
 441 static void pcnet32_netif_stop(struct net_device *dev)
 442 {
 443         dev->trans_start = jiffies;
 444         netif_poll_disable(dev);
 445         netif_tx_disable(dev);
 446 }
 447
 448 static void pcnet32_netif_start(struct net_device *dev)
 449 {
 450         netif_wake_queue(dev);
 451         netif_poll_enable(dev);
 452 }
 453
 454 /*
 455  * Allocate space for the new sized tx ring.
 456  * Free old resources
 457  * Save new resources.
 458  * Any failure keeps old resources.
 459  * Must be called with lp->lock held.
 460  */
 461 static void pcnet32_realloc_tx_ring(struct net_device *dev,
 462                                     struct pcnet32_private *lp,
 463                                     unsigned int size)
 464 {
 465         dma_addr_t new_ring_dma_addr;
 466         dma_addr_t *new_dma_addr_list;
 467         struct pcnet32_tx_head *new_tx_ring;
 468         struct sk_buff **new_skb_list;
 469
 470         pcnet32_purge_tx_ring(dev);
 471
 472         new_tx_ring = pci_alloc_consistent(lp->pci_dev,
 473                                            sizeof(struct pcnet32_tx_head) *
 474                                            (1 << size),
 475                                            &new_ring_dma_addr);
 476         if (new_tx_ring == NULL) {
 477                 if (netif_msg_drv(lp))
 478                         printk("\n" KERN_ERR
 479                                "%s: Consistent memory allocation failed.\n",
 480                                dev->name);
 481                 return;
 482         }
 483         memset(new_tx_ring, 0, sizeof(struct pcnet32_tx_head) * (1 << size));
 484
 485         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
 486                                 GFP_ATOMIC);
 487         if (!new_dma_addr_list) {
 488                 if (netif_msg_drv(lp))
 489                         printk("\n" KERN_ERR
 490                                "%s: Memory allocation failed.\n", dev->name);
 491                 goto free_new_tx_ring;
 492         }
 493
 494         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
 495                                 GFP_ATOMIC);
 496         if (!new_skb_list) {
 497                 if (netif_msg_drv(lp))
 498                         printk("\n" KERN_ERR
 499                                "%s: Memory allocation failed.\n", dev->name);
 500                 goto free_new_lists;
 501         }
 502
 503         kfree(lp->tx_skbuff);
 504         kfree(lp->tx_dma_addr);
 505         pci_free_consistent(lp->pci_dev,
 506                             sizeof(struct pcnet32_tx_head) *
 507                             lp->tx_ring_size, lp->tx_ring,
 508                             lp->tx_ring_dma_addr);
 509
 510         lp->tx_ring_size = (1 << size);
 511         lp->tx_mod_mask = lp->tx_ring_size - 1;
 512         lp->tx_len_bits = (size << 12);
 513         lp->tx_ring = new_tx_ring;
 514         lp->tx_ring_dma_addr = new_ring_dma_addr;
 515         lp->tx_dma_addr = new_dma_addr_list;
 516         lp->tx_skbuff = new_skb_list;
 517         return;
 518
 519     free_new_lists:
 520         kfree(new_dma_addr_list);
 521     free_new_tx_ring:
 522         pci_free_consistent(lp->pci_dev,
 523                             sizeof(struct pcnet32_tx_head) *
 524                             (1 << size),
 525                             new_tx_ring,
 526                             new_ring_dma_addr);
 527         return;
 528 }
 529
 530 /*
 531  * Allocate space for the new sized rx ring.
 532  * Re-use old receive buffers.
 533  *   alloc extra buffers
 534  *   free unneeded buffers
 535  *   free unneeded buffers
 536  * Save new resources.
 537  * Any failure keeps old resources.
 538  * Must be called with lp->lock held.
 539  */
 540 static void pcnet32_realloc_rx_ring(struct net_device *dev,
 541                                     struct pcnet32_private *lp,
 542                                     unsigned int size)
 543 {
 544         dma_addr_t new_ring_dma_addr;
 545         dma_addr_t *new_dma_addr_list;
 546         struct pcnet32_rx_head *new_rx_ring;
 547         struct sk_buff **new_skb_list;
 548         int new, overlap;
 549
 550         new_rx_ring = pci_alloc_consistent(lp->pci_dev,
 551                                            sizeof(struct pcnet32_rx_head) *
 552                                            (1 << size),
 553                                            &new_ring_dma_addr);
 554         if (new_rx_ring == NULL) {
 555                 if (netif_msg_drv(lp))
 556                         printk("\n" KERN_ERR
 557                                "%s: Consistent memory allocation failed.\n",
 558                                dev->name);
 559                 return;
 560         }
 561         memset(new_rx_ring, 0, sizeof(struct pcnet32_rx_head) * (1 << size));
 562
 563         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
 564                                 GFP_ATOMIC);
 565         if (!new_dma_addr_list) {
 566                 if (netif_msg_drv(lp))
 567                         printk("\n" KERN_ERR
 568                                "%s: Memory allocation failed.\n", dev->name);
 569                 goto free_new_rx_ring;
 570         }
 571
 572         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
 573                                 GFP_ATOMIC);
 574         if (!new_skb_list) {
 575                 if (netif_msg_drv(lp))
 576                         printk("\n" KERN_ERR
 577                                "%s: Memory allocation failed.\n", dev->name);
 578                 goto free_new_lists;
 579         }
 580
 581         /* first copy the current receive buffers */
 582         overlap = min(size, lp->rx_ring_size);
 583         for (new = 0; new < overlap; new++) {
 584                 new_rx_ring[new] = lp->rx_ring[new];
 585                 new_dma_addr_list[new] = lp->rx_dma_addr[new];
 586                 new_skb_list[new] = lp->rx_skbuff[new];
 587         }
 588         /* now allocate any new buffers needed */
 589         for (; new < size; new++ ) {
 590                 struct sk_buff *rx_skbuff;
 591                 new_skb_list[new] = dev_alloc_skb(PKT_BUF_SZ);
 592                 if (!(rx_skbuff = new_skb_list[new])) {
 593                         /* keep the original lists and buffers */
 594                         if (netif_msg_drv(lp))
 595                                 printk(KERN_ERR
 596                                        "%s: pcnet32_realloc_rx_ring dev_alloc_skb failed.\n",
 597                                        dev->name);
 598                         goto free_all_new;
 599                 }
 600                 skb_reserve(rx_skbuff, 2);
 601
 602                 new_dma_addr_list[new] =
 603                             pci_map_single(lp->pci_dev, rx_skbuff->data,
 604                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 605                 new_rx_ring[new].base = (u32) le32_to_cpu(new_dma_addr_list[new]);
 606                 new_rx_ring[new].buf_length = le16_to_cpu(2 - PKT_BUF_SZ);
 607                 new_rx_ring[new].status = le16_to_cpu(0x8000);
 608         }
 609         /* and free any unneeded buffers */
 610         for (; new < lp->rx_ring_size; new++) {
 611                 if (lp->rx_skbuff[new]) {
 612                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[new],
 613                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 614                         dev_kfree_skb(lp->rx_skbuff[new]);
 615                 }
 616         }
 617
 618         kfree(lp->rx_skbuff);
 619         kfree(lp->rx_dma_addr);
 620         pci_free_consistent(lp->pci_dev,
 621                             sizeof(struct pcnet32_rx_head) *
 622                             lp->rx_ring_size, lp->rx_ring,
 623                             lp->rx_ring_dma_addr);
 624
 625         lp->rx_ring_size = (1 << size);
 626         lp->rx_mod_mask = lp->rx_ring_size - 1;
 627         lp->rx_len_bits = (size << 4);
 628         lp->rx_ring = new_rx_ring;
 629         lp->rx_ring_dma_addr = new_ring_dma_addr;
 630         lp->rx_dma_addr = new_dma_addr_list;
 631         lp->rx_skbuff = new_skb_list;
 632         return;
 633
 634     free_all_new:
 635         for (; --new >= lp->rx_ring_size; ) {
 636                 if (new_skb_list[new]) {
 637                         pci_unmap_single(lp->pci_dev, new_dma_addr_list[new],
 638                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 639                         dev_kfree_skb(new_skb_list[new]);
 640                 }
 641         }
 642         kfree(new_skb_list);
 643     free_new_lists:
 644         kfree(new_dma_addr_list);
 645     free_new_rx_ring:
 646         pci_free_consistent(lp->pci_dev,
 647                             sizeof(struct pcnet32_rx_head) *
 648                             (1 << size),
 649                             new_rx_ring,
 650                             new_ring_dma_addr);
 651         return;
 652 }
 653
 654 static void pcnet32_purge_rx_ring(struct net_device *dev)
 655 {
 656         struct pcnet32_private *lp = netdev_priv(dev);
 657         int i;
 658
 659         /* free all allocated skbuffs */
 660         for (i = 0; i < lp->rx_ring_size; i++) {
 661                 lp->rx_ring[i].status = 0;      /* CPU owns buffer */
 662                 wmb();          /* Make sure adapter sees owner change */
 663                 if (lp->rx_skbuff[i]) {
 664                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i],
 665                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 666                         dev_kfree_skb_any(lp->rx_skbuff[i]);
 667                 }
 668                 lp->rx_skbuff[i] = NULL;
 669                 lp->rx_dma_addr[i] = 0;
 670         }
 671 }
 672
 673 #ifdef CONFIG_NET_POLL_CONTROLLER
 674 static void pcnet32_poll_controller(struct net_device *dev)
 675 {
 676         disable_irq(dev->irq);
 677         pcnet32_interrupt(0, dev);
 678         enable_irq(dev->irq);
 679 }
 680 #endif
 681
 682 static int pcnet32_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 683 {
 684         struct pcnet32_private *lp = netdev_priv(dev);
 685         unsigned long flags;
 686         int r = -EOPNOTSUPP;
 687
 688         if (lp->mii) {
 689                 spin_lock_irqsave(&lp->lock, flags);
 690                 mii_ethtool_gset(&lp->mii_if, cmd);
 691                 spin_unlock_irqrestore(&lp->lock, flags);
 692                 r = 0;
 693         }
 694         return r;
 695 }
 696
 697 static int pcnet32_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 698 {
 699         struct pcnet32_private *lp = netdev_priv(dev);
 700         unsigned long flags;
 701         int r = -EOPNOTSUPP;
 702
 703         if (lp->mii) {
 704                 spin_lock_irqsave(&lp->lock, flags);
 705                 r = mii_ethtool_sset(&lp->mii_if, cmd);
 706                 spin_unlock_irqrestore(&lp->lock, flags);
 707         }
 708         return r;
 709 }
 710
 711 static void pcnet32_get_drvinfo(struct net_device *dev,
 712                                 struct ethtool_drvinfo *info)
 713 {
 714         struct pcnet32_private *lp = netdev_priv(dev);
 715
 716         strcpy(info->driver, DRV_NAME);
 717         strcpy(info->version, DRV_VERSION);
 718         if (lp->pci_dev)
 719                 strcpy(info->bus_info, pci_name(lp->pci_dev));
 720         else
 721                 sprintf(info->bus_info, "VLB 0x%lx", dev->base_addr);
 722 }
 723
 724 static u32 pcnet32_get_link(struct net_device *dev)
 725 {
 726         struct pcnet32_private *lp = netdev_priv(dev);
 727         unsigned long flags;
 728         int r;
 729
 730         spin_lock_irqsave(&lp->lock, flags);
 731         if (lp->mii) {
 732                 r = mii_link_ok(&lp->mii_if);
 733         } else if (lp->chip_version >= PCNET32_79C970A) {
 734                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
 735                 r = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
 736         } else {        /* can not detect link on really old chips */
 737                 r = 1;
 738         }
 739         spin_unlock_irqrestore(&lp->lock, flags);
 740
 741         return r;
 742 }
 743
 744 static u32 pcnet32_get_msglevel(struct net_device *dev)
 745 {
 746         struct pcnet32_private *lp = netdev_priv(dev);
 747         return lp->msg_enable;
 748 }
 749
 750 static void pcnet32_set_msglevel(struct net_device *dev, u32 value)
 751 {
 752         struct pcnet32_private *lp = netdev_priv(dev);
 753         lp->msg_enable = value;
 754 }
 755
 756 static int pcnet32_nway_reset(struct net_device *dev)
 757 {
 758         struct pcnet32_private *lp = netdev_priv(dev);
 759         unsigned long flags;
 760         int r = -EOPNOTSUPP;
 761
 762         if (lp->mii) {
 763                 spin_lock_irqsave(&lp->lock, flags);
 764                 r = mii_nway_restart(&lp->mii_if);
 765                 spin_unlock_irqrestore(&lp->lock, flags);
 766         }
 767         return r;
 768 }
 769
 770 static void pcnet32_get_ringparam(struct net_device *dev,
 771                                   struct ethtool_ringparam *ering)
 772 {
 773         struct pcnet32_private *lp = netdev_priv(dev);
 774
 775         ering->tx_max_pending = TX_MAX_RING_SIZE;
 776         ering->tx_pending = lp->tx_ring_size;
 777         ering->rx_max_pending = RX_MAX_RING_SIZE;
 778         ering->rx_pending = lp->rx_ring_size;
 779 }
 780
 781 static int pcnet32_set_ringparam(struct net_device *dev,
 782                                  struct ethtool_ringparam *ering)
 783 {
 784         struct pcnet32_private *lp = netdev_priv(dev);
 785         unsigned long flags;
 786         unsigned int size;
 787         ulong ioaddr = dev->base_addr;
 788         int i;
 789
 790         if (ering->rx_mini_pending || ering->rx_jumbo_pending)
 791                 return -EINVAL;
 792
 793         if (netif_running(dev))
 794                 pcnet32_netif_stop(dev);
 795
 796         spin_lock_irqsave(&lp->lock, flags);
 797         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
 798
 799         size = min(ering->tx_pending, (unsigned int)TX_MAX_RING_SIZE);
 800
 801         /* set the minimum ring size to 4, to allow the loopback test to work
 802          * unchanged.
 803          */
 804         for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
 805                 if (size <= (1 << i))
 806                         break;
 807         }
 808         if ((1 << i) != lp->tx_ring_size)
 809                 pcnet32_realloc_tx_ring(dev, lp, i);
 810
 811         size = min(ering->rx_pending, (unsigned int)RX_MAX_RING_SIZE);
 812         for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
 813                 if (size <= (1 << i))
 814                         break;
 815         }
 816         if ((1 << i) != lp->rx_ring_size)
 817                 pcnet32_realloc_rx_ring(dev, lp, i);
 818
 819         dev->weight = lp->rx_ring_size / 2;
 820
 821         if (netif_running(dev)) {
 822                 pcnet32_netif_start(dev);
 823                 pcnet32_restart(dev, CSR0_NORMAL);
 824         }
 825
 826         spin_unlock_irqrestore(&lp->lock, flags);
 827
 828         if (netif_msg_drv(lp))
 829                 printk(KERN_INFO
 830                        "%s: Ring Param Settings: RX: %d, TX: %d\n", dev->name,
 831                        lp->rx_ring_size, lp->tx_ring_size);
 832
 833         return 0;
 834 }
 835
 836 static void pcnet32_get_strings(struct net_device *dev, u32 stringset,
 837                                 u8 * data)
 838 {
 839         memcpy(data, pcnet32_gstrings_test, sizeof(pcnet32_gstrings_test));
 840 }
 841
 842 static int pcnet32_self_test_count(struct net_device *dev)
 843 {
 844         return PCNET32_TEST_LEN;
 845 }
 846
 847 static void pcnet32_ethtool_test(struct net_device *dev,
 848                                  struct ethtool_test *test, u64 * data)
 849 {
 850         struct pcnet32_private *lp = netdev_priv(dev);
 851         int rc;
 852
 853         if (test->flags == ETH_TEST_FL_OFFLINE) {
 854                 rc = pcnet32_loopback_test(dev, data);
 855                 if (rc) {
 856                         if (netif_msg_hw(lp))
 857                                 printk(KERN_DEBUG "%s: Loopback test failed.\n",
 858                                        dev->name);
 859                         test->flags |= ETH_TEST_FL_FAILED;
 860                 } else if (netif_msg_hw(lp))
 861                         printk(KERN_DEBUG "%s: Loopback test passed.\n",
 862                                dev->name);
 863         } else if (netif_msg_hw(lp))
 864                 printk(KERN_DEBUG
 865                        "%s: No tests to run (specify 'Offline' on ethtool).",
 866                        dev->name);
 867 }                               /* end pcnet32_ethtool_test */
 868
 869 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1)
 870 {
 871         struct pcnet32_private *lp = netdev_priv(dev);
 872         struct pcnet32_access *a = &lp->a;      /* access to registers */
 873         ulong ioaddr = dev->base_addr;  /* card base I/O address */
 874         struct sk_buff *skb;    /* sk buff */
 875         int x, i;               /* counters */
 876         int numbuffs = 4;       /* number of TX/RX buffers and descs */
 877         u16 status = 0x8300;    /* TX ring status */
 878         u16 teststatus;         /* test of ring status */
 879         int rc;                 /* return code */
 880         int size;               /* size of packets */
 881         unsigned char *packet;  /* source packet data */
 882         static const int data_len = 60; /* length of source packets */
 883         unsigned long flags;
 884         unsigned long ticks;
 885
 886         rc = 1;                 /* default to fail */
 887
 888         if (netif_running(dev))
 889 #ifdef CONFIG_PCNET32_NAPI
 890                 pcnet32_netif_stop(dev);
 891 #else
 892                 pcnet32_close(dev);
 893 #endif
 894
 895         spin_lock_irqsave(&lp->lock, flags);
 896         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
 897
 898         numbuffs = min(numbuffs, (int)min(lp->rx_ring_size, lp->tx_ring_size));
 899
 900         /* Reset the PCNET32 */
 901         lp->a.reset(ioaddr);
 902         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
 903
 904         /* switch pcnet32 to 32bit mode */
 905         lp->a.write_bcr(ioaddr, 20, 2);
 906
 907         /* purge & init rings but don't actually restart */
 908         pcnet32_restart(dev, 0x0000);
 909
 910         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
 911
 912         /* Initialize Transmit buffers. */
 913         size = data_len + 15;
 914         for (x = 0; x < numbuffs; x++) {
 915                 if (!(skb = dev_alloc_skb(size))) {
 916                         if (netif_msg_hw(lp))
 917                                 printk(KERN_DEBUG
 918                                        "%s: Cannot allocate skb at line: %d!\n",
 919                                        dev->name, __LINE__);
 920                         goto clean_up;
 921                 } else {
 922                         packet = skb->data;
 923                         skb_put(skb, size);     /* create space for data */
 924                         lp->tx_skbuff[x] = skb;
 925                         lp->tx_ring[x].length = le16_to_cpu(-skb->len);
 926                         lp->tx_ring[x].misc = 0;
 927
 928                         /* put DA and SA into the skb */
 929                         for (i = 0; i < 6; i++)
 930                                 *packet++ = dev->dev_addr[i];
 931                         for (i = 0; i < 6; i++)
 932                                 *packet++ = dev->dev_addr[i];
 933                         /* type */
 934                         *packet++ = 0x08;
 935                         *packet++ = 0x06;
 936                         /* packet number */
 937                         *packet++ = x;
 938                         /* fill packet with data */
 939                         for (i = 0; i < data_len; i++)
 940                                 *packet++ = i;
 941
 942                         lp->tx_dma_addr[x] =
 943                             pci_map_single(lp->pci_dev, skb->data, skb->len,
 944                                            PCI_DMA_TODEVICE);
 945                         lp->tx_ring[x].base =
 946                             (u32) le32_to_cpu(lp->tx_dma_addr[x]);
 947                         wmb();  /* Make sure owner changes after all others are visible */
 948                         lp->tx_ring[x].status = le16_to_cpu(status);
 949                 }
 950         }
 951
 952         x = a->read_bcr(ioaddr, 32);    /* set internal loopback in BCR32 */
 953         a->write_bcr(ioaddr, 32, x | 0x0002);
 954
 955         /* set int loopback in CSR15 */
 956         x = a->read_csr(ioaddr, CSR15) & 0xfffc;
 957         lp->a.write_csr(ioaddr, CSR15, x | 0x0044);
 958
 959         teststatus = le16_to_cpu(0x8000);
 960         lp->a.write_csr(ioaddr, CSR0, CSR0_START);      /* Set STRT bit */
 961
 962         /* Check status of descriptors */
 963         for (x = 0; x < numbuffs; x++) {
 964                 ticks = 0;
 965                 rmb();
 966                 while ((lp->rx_ring[x].status & teststatus) && (ticks < 200)) {
 967                         spin_unlock_irqrestore(&lp->lock, flags);
 968                         msleep(1);
 969                         spin_lock_irqsave(&lp->lock, flags);
 970                         rmb();
 971                         ticks++;
 972                 }
 973                 if (ticks == 200) {
 974                         if (netif_msg_hw(lp))
 975                                 printk("%s: Desc %d failed to reset!\n",
 976                                        dev->name, x);
 977                         break;
 978                 }
 979         }
 980
 981         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
 982         wmb();
 983         if (netif_msg_hw(lp) && netif_msg_pktdata(lp)) {
 984                 printk(KERN_DEBUG "%s: RX loopback packets:\n", dev->name);
 985
 986                 for (x = 0; x < numbuffs; x++) {
 987                         printk(KERN_DEBUG "%s: Packet %d:\n", dev->name, x);
 988                         skb = lp->rx_skbuff[x];
 989                         for (i = 0; i < size; i++) {
 990                                 printk("%02x ", *(skb->data + i));
 991                         }
 992                         printk("\n");
 993                 }
 994         }
 995
 996         x = 0;
 997         rc = 0;
 998         while (x < numbuffs && !rc) {
 999                 skb = lp->rx_skbuff[x];
1000                 packet = lp->tx_skbuff[x]->data;
1001                 for (i = 0; i < size; i++) {
1002                         if (*(skb->data + i) != packet[i]) {
1003                                 if (netif_msg_hw(lp))
1004                                         printk(KERN_DEBUG
1005                                                "%s: Error in compare! %2x - %02x %02x\n",
1006                                                dev->name, i, *(skb->data + i),
1007                                                packet[i]);
1008                                 rc = 1;
1009                                 break;
1010                         }
1011                 }
1012                 x++;
1013         }
1014
1015       clean_up:
1016         *data1 = rc;
1017         pcnet32_purge_tx_ring(dev);
1018
1019         x = a->read_csr(ioaddr, CSR15);
1020         a->write_csr(ioaddr, CSR15, (x & ~0x0044));     /* reset bits 6 and 2 */
1021
1022         x = a->read_bcr(ioaddr, 32);    /* reset internal loopback */
1023         a->write_bcr(ioaddr, 32, (x & ~0x0002));
1024
1025 #ifdef CONFIG_PCNET32_NAPI
1026         if (netif_running(dev)) {
1027                 pcnet32_netif_start(dev);
1028                 pcnet32_restart(dev, CSR0_NORMAL);
1029         } else {
1030                 pcnet32_purge_rx_ring(dev);
1031                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1032         }
1033         spin_unlock_irqrestore(&lp->lock, flags);
1034 #else
1035         if (netif_running(dev)) {
1036                 spin_unlock_irqrestore(&lp->lock, flags);
1037                 pcnet32_open(dev);
1038         } else {
1039                 pcnet32_purge_rx_ring(dev);
1040                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1041                 spin_unlock_irqrestore(&lp->lock, flags);
1042         }
1043 #endif
1044
1045         return (rc);
1046 }                               /* end pcnet32_loopback_test  */
1047
1048 static void pcnet32_led_blink_callback(struct net_device *dev)
1049 {
1050         struct pcnet32_private *lp = netdev_priv(dev);
1051         struct pcnet32_access *a = &lp->a;
1052         ulong ioaddr = dev->base_addr;
1053         unsigned long flags;
1054         int i;
1055
1056         spin_lock_irqsave(&lp->lock, flags);
1057         for (i = 4; i < 8; i++) {
1058                 a->write_bcr(ioaddr, i, a->read_bcr(ioaddr, i) ^ 0x4000);
1059         }
1060         spin_unlock_irqrestore(&lp->lock, flags);
1061
1062         mod_timer(&lp->blink_timer, PCNET32_BLINK_TIMEOUT);
1063 }
1064
1065 static int pcnet32_phys_id(struct net_device *dev, u32 data)
1066 {
1067         struct pcnet32_private *lp = netdev_priv(dev);
1068         struct pcnet32_access *a = &lp->a;
1069         ulong ioaddr = dev->base_addr;
1070         unsigned long flags;
1071         int i, regs[4];
1072
1073         if (!lp->blink_timer.function) {
1074                 init_timer(&lp->blink_timer);
1075                 lp->blink_timer.function = (void *)pcnet32_led_blink_callback;
1076                 lp->blink_timer.data = (unsigned long)dev;
1077         }
1078
1079         /* Save the current value of the bcrs */
1080         spin_lock_irqsave(&lp->lock, flags);
1081         for (i = 4; i < 8; i++) {
1082                 regs[i - 4] = a->read_bcr(ioaddr, i);
1083         }
1084         spin_unlock_irqrestore(&lp->lock, flags);
1085
1086         mod_timer(&lp->blink_timer, jiffies);
1087         set_current_state(TASK_INTERRUPTIBLE);
1088
1089         if ((!data) || (data > (u32) (MAX_SCHEDULE_TIMEOUT / HZ)))
1090                 data = (u32) (MAX_SCHEDULE_TIMEOUT / HZ);
1091
1092         msleep_interruptible(data * 1000);
1093         del_timer_sync(&lp->blink_timer);
1094
1095         /* Restore the original value of the bcrs */
1096         spin_lock_irqsave(&lp->lock, flags);
1097         for (i = 4; i < 8; i++) {
1098                 a->write_bcr(ioaddr, i, regs[i - 4]);
1099         }
1100         spin_unlock_irqrestore(&lp->lock, flags);
1101
1102         return 0;
1103 }
1104
1105 /*
1106  * lp->lock must be held.
1107  */
1108 static int pcnet32_suspend(struct net_device *dev, unsigned long *flags,
1109                 int can_sleep)
1110 {
1111         int csr5;
1112         struct pcnet32_private *lp = netdev_priv(dev);
1113         struct pcnet32_access *a = &lp->a;
1114         ulong ioaddr = dev->base_addr;
1115         int ticks;
1116
1117         /* really old chips have to be stopped. */
1118         if (lp->chip_version < PCNET32_79C970A)
1119                 return 0;
1120
1121         /* set SUSPEND (SPND) - CSR5 bit 0 */
1122         csr5 = a->read_csr(ioaddr, CSR5);
1123         a->write_csr(ioaddr, CSR5, csr5 | CSR5_SUSPEND);
1124
1125         /* poll waiting for bit to be set */
1126         ticks = 0;
1127         while (!(a->read_csr(ioaddr, CSR5) & CSR5_SUSPEND)) {
1128                 spin_unlock_irqrestore(&lp->lock, *flags);
1129                 if (can_sleep)
1130                         msleep(1);
1131                 else
1132                         mdelay(1);
1133                 spin_lock_irqsave(&lp->lock, *flags);
1134                 ticks++;
1135                 if (ticks > 200) {
1136                         if (netif_msg_hw(lp))
1137                                 printk(KERN_DEBUG
1138                                        "%s: Error getting into suspend!\n",
1139                                        dev->name);
1140                         return 0;
1141                 }
1142         }
1143         return 1;
1144 }
1145
1146 /*
1147  * process one receive descriptor entry
1148  */
1149
1150 static void pcnet32_rx_entry(struct net_device *dev,
1151                              struct pcnet32_private *lp,
1152                              struct pcnet32_rx_head *rxp,
1153                              int entry)
1154 {
1155         int status = (short)le16_to_cpu(rxp->status) >> 8;
1156         int rx_in_place = 0;
1157         struct sk_buff *skb;
1158         short pkt_len;
1159
1160         if (status != 0x03) {   /* There was an error. */
1161                 /*
1162                  * There is a tricky error noted by John Murphy,
1163                  * <murf@perftech.com> to Russ Nelson: Even with full-sized
1164                  * buffers it's possible for a jabber packet to use two
1165                  * buffers, with only the last correctly noting the error.
1166                  */
1167                 if (status & 0x01)      /* Only count a general error at the */
1168                         lp->stats.rx_errors++;  /* end of a packet. */
1169                 if (status & 0x20)
1170                         lp->stats.rx_frame_errors++;
1171                 if (status & 0x10)
1172                         lp->stats.rx_over_errors++;
1173                 if (status & 0x08)
1174                         lp->stats.rx_crc_errors++;
1175                 if (status & 0x04)
1176                         lp->stats.rx_fifo_errors++;
1177                 return;
1178         }
1179
1180         pkt_len = (le32_to_cpu(rxp->msg_length) & 0xfff) - 4;
1181
1182         /* Discard oversize frames. */
1183         if (unlikely(pkt_len > PKT_BUF_SZ - 2)) {
1184                 if (netif_msg_drv(lp))
1185                         printk(KERN_ERR "%s: Impossible packet size %d!\n",
1186                                dev->name, pkt_len);
1187                 lp->stats.rx_errors++;
1188                 return;
1189         }
1190         if (pkt_len < 60) {
1191                 if (netif_msg_rx_err(lp))
1192                         printk(KERN_ERR "%s: Runt packet!\n", dev->name);
1193                 lp->stats.rx_errors++;
1194                 return;
1195         }
1196
1197         if (pkt_len > rx_copybreak) {
1198                 struct sk_buff *newskb;
1199
1200                 if ((newskb = dev_alloc_skb(PKT_BUF_SZ))) {
1201                         skb_reserve(newskb, 2);
1202                         skb = lp->rx_skbuff[entry];
1203                         pci_unmap_single(lp->pci_dev,
1204                                          lp->rx_dma_addr[entry],
1205                                          PKT_BUF_SZ - 2,
1206                                          PCI_DMA_FROMDEVICE);
1207                         skb_put(skb, pkt_len);
1208                         lp->rx_skbuff[entry] = newskb;
1209                         lp->rx_dma_addr[entry] =
1210                                             pci_map_single(lp->pci_dev,
1211                                                            newskb->data,
1212                                                            PKT_BUF_SZ - 2,
1213                                                            PCI_DMA_FROMDEVICE);
1214                         rxp->base = le32_to_cpu(lp->rx_dma_addr[entry]);
1215                         rx_in_place = 1;
1216                 } else
1217                         skb = NULL;
1218         } else {
1219                 skb = dev_alloc_skb(pkt_len + 2);
1220         }
1221
1222         if (skb == NULL) {
1223                 if (netif_msg_drv(lp))
1224                         printk(KERN_ERR
1225                                "%s: Memory squeeze, dropping packet.\n",
1226                                dev->name);
1227                 lp->stats.rx_dropped++;
1228                 return;
1229         }
1230         skb->dev = dev;
1231         if (!rx_in_place) {
1232                 skb_reserve(skb, 2);    /* 16 byte align */
1233                 skb_put(skb, pkt_len);  /* Make room */
1234                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1235                                             lp->rx_dma_addr[entry],
1236                                             pkt_len,
1237                                             PCI_DMA_FROMDEVICE);
1238                 skb_copy_to_linear_data(skb,
1239                                  (unsigned char *)(lp->rx_skbuff[entry]->data),
1240                                  pkt_len);
1241                 pci_dma_sync_single_for_device(lp->pci_dev,
1242                                                lp->rx_dma_addr[entry],
1243                                                pkt_len,
1244                                                PCI_DMA_FROMDEVICE);
1245         }
1246         lp->stats.rx_bytes += skb->len;
1247         skb->protocol = eth_type_trans(skb, dev);
1248 #ifdef CONFIG_PCNET32_NAPI
1249         netif_receive_skb(skb);
1250 #else
1251         netif_rx(skb);
1252 #endif
1253         dev->last_rx = jiffies;
1254         lp->stats.rx_packets++;
1255         return;
1256 }
1257
1258 static int pcnet32_rx(struct net_device *dev, int quota)
1259 {
1260         struct pcnet32_private *lp = netdev_priv(dev);
1261         int entry = lp->cur_rx & lp->rx_mod_mask;
1262         struct pcnet32_rx_head *rxp = &lp->rx_ring[entry];
1263         int npackets = 0;
1264
1265         /* If we own the next entry, it's a new packet. Send it up. */
1266         while (quota > npackets && (short)le16_to_cpu(rxp->status) >= 0) {
1267                 pcnet32_rx_entry(dev, lp, rxp, entry);
1268                 npackets += 1;
1269                 /*
1270                  * The docs say that the buffer length isn't touched, but Andrew
1271                  * Boyd of QNX reports that some revs of the 79C965 clear it.
1272                  */
1273                 rxp->buf_length = le16_to_cpu(2 - PKT_BUF_SZ);
1274                 wmb();  /* Make sure owner changes after others are visible */
1275                 rxp->status = le16_to_cpu(0x8000);
1276                 entry = (++lp->cur_rx) & lp->rx_mod_mask;
1277                 rxp = &lp->rx_ring[entry];
1278         }
1279
1280         return npackets;
1281 }
1282
1283 static int pcnet32_tx(struct net_device *dev)
1284 {
1285         struct pcnet32_private *lp = netdev_priv(dev);
1286         unsigned int dirty_tx = lp->dirty_tx;
1287         int delta;
1288         int must_restart = 0;
1289
1290         while (dirty_tx != lp->cur_tx) {
1291                 int entry = dirty_tx & lp->tx_mod_mask;
1292                 int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
1293
1294                 if (status < 0)
1295                         break;  /* It still hasn't been Txed */
1296
1297                 lp->tx_ring[entry].base = 0;
1298
1299                 if (status & 0x4000) {
1300                         /* There was a major error, log it. */
1301                         int err_status = le32_to_cpu(lp->tx_ring[entry].misc);
1302                         lp->stats.tx_errors++;
1303                         if (netif_msg_tx_err(lp))
1304                                 printk(KERN_ERR
1305                                        "%s: Tx error status=%04x err_status=%08x\n",
1306                                        dev->name, status,
1307                                        err_status);
1308                         if (err_status & 0x04000000)
1309                                 lp->stats.tx_aborted_errors++;
1310                         if (err_status & 0x08000000)
1311                                 lp->stats.tx_carrier_errors++;
1312                         if (err_status & 0x10000000)
1313                                 lp->stats.tx_window_errors++;
1314 #ifndef DO_DXSUFLO
1315                         if (err_status & 0x40000000) {
1316                                 lp->stats.tx_fifo_errors++;
1317                                 /* Ackk!  On FIFO errors the Tx unit is turned off! */
1318                                 /* Remove this verbosity later! */
1319                                 if (netif_msg_tx_err(lp))
1320                                         printk(KERN_ERR
1321                                                "%s: Tx FIFO error!\n",
1322                                                dev->name);
1323                                 must_restart = 1;
1324                         }
1325 #else
1326                         if (err_status & 0x40000000) {
1327                                 lp->stats.tx_fifo_errors++;
1328                                 if (!lp->dxsuflo) {     /* If controller doesn't recover ... */
1329                                         /* Ackk!  On FIFO errors the Tx unit is turned off! */
1330                                         /* Remove this verbosity later! */
1331                                         if (netif_msg_tx_err(lp))
1332                                                 printk(KERN_ERR
1333                                                        "%s: Tx FIFO error!\n",
1334                                                        dev->name);
1335                                         must_restart = 1;
1336                                 }
1337                         }
1338 #endif
1339                 } else {
1340                         if (status & 0x1800)
1341                                 lp->stats.collisions++;
1342                         lp->stats.tx_packets++;
1343                 }
1344
1345                 /* We must free the original skb */
1346                 if (lp->tx_skbuff[entry]) {
1347                         pci_unmap_single(lp->pci_dev,
1348                                          lp->tx_dma_addr[entry],
1349                                          lp->tx_skbuff[entry]->
1350                                          len, PCI_DMA_TODEVICE);
1351                         dev_kfree_skb_any(lp->tx_skbuff[entry]);
1352                         lp->tx_skbuff[entry] = NULL;
1353                         lp->tx_dma_addr[entry] = 0;
1354                 }
1355                 dirty_tx++;
1356         }
1357
1358         delta = (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask + lp->tx_ring_size);
1359         if (delta > lp->tx_ring_size) {
1360                 if (netif_msg_drv(lp))
1361                         printk(KERN_ERR
1362                                "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1363                                dev->name, dirty_tx, lp->cur_tx,
1364                                lp->tx_full);
1365                 dirty_tx += lp->tx_ring_size;
1366                 delta -= lp->tx_ring_size;
1367         }
1368
1369         if (lp->tx_full &&
1370             netif_queue_stopped(dev) &&
1371             delta < lp->tx_ring_size - 2) {
1372                 /* The ring is no longer full, clear tbusy. */
1373                 lp->tx_full = 0;
1374                 netif_wake_queue(dev);
1375         }
1376         lp->dirty_tx = dirty_tx;
1377
1378         return must_restart;
1379 }
1380
1381 #ifdef CONFIG_PCNET32_NAPI
1382 static int pcnet32_poll(struct net_device *dev, int *budget)
1383 {
1384         struct pcnet32_private *lp = netdev_priv(dev);
1385         int quota = min(dev->quota, *budget);
1386         unsigned long ioaddr = dev->base_addr;
1387         unsigned long flags;
1388         u16 val;
1389
1390         quota = pcnet32_rx(dev, quota);
1391
1392         spin_lock_irqsave(&lp->lock, flags);
1393         if (pcnet32_tx(dev)) {
1394                 /* reset the chip to clear the error condition, then restart */
1395                 lp->a.reset(ioaddr);
1396                 lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
1397                 pcnet32_restart(dev, CSR0_START);
1398                 netif_wake_queue(dev);
1399         }
1400         spin_unlock_irqrestore(&lp->lock, flags);
1401
1402         *budget -= quota;
1403         dev->quota -= quota;
1404
1405         if (dev->quota == 0) {
1406                 return 1;
1407         }
1408
1409         netif_rx_complete(dev);
1410
1411         spin_lock_irqsave(&lp->lock, flags);
1412
1413         /* clear interrupt masks */
1414         val = lp->a.read_csr(ioaddr, CSR3);
1415         val &= 0x00ff;
1416         lp->a.write_csr(ioaddr, CSR3, val);
1417
1418         /* Set interrupt enable. */
1419         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
1420         mmiowb();
1421         spin_unlock_irqrestore(&lp->lock, flags);
1422
1423         return 0;
1424 }
1425 #endif
1426
1427 #define PCNET32_REGS_PER_PHY    32
1428 #define PCNET32_MAX_PHYS        32
1429 static int pcnet32_get_regs_len(struct net_device *dev)
1430 {
1431         struct pcnet32_private *lp = netdev_priv(dev);
1432         int j = lp->phycount * PCNET32_REGS_PER_PHY;
1433
1434         return ((PCNET32_NUM_REGS + j) * sizeof(u16));
1435 }
1436
1437 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1438                              void *ptr)
1439 {
1440         int i, csr0;
1441         u16 *buff = ptr;
1442         struct pcnet32_private *lp = netdev_priv(dev);
1443         struct pcnet32_access *a = &lp->a;
1444         ulong ioaddr = dev->base_addr;
1445         unsigned long flags;
1446
1447         spin_lock_irqsave(&lp->lock, flags);
1448
1449         csr0 = a->read_csr(ioaddr, CSR0);
1450         if (!(csr0 & CSR0_STOP))        /* If not stopped */
1451                 pcnet32_suspend(dev, &flags, 1);
1452
1453         /* read address PROM */
1454         for (i = 0; i < 16; i += 2)
1455                 *buff++ = inw(ioaddr + i);
1456
1457         /* read control and status registers */
1458         for (i = 0; i < 90; i++) {
1459                 *buff++ = a->read_csr(ioaddr, i);
1460         }
1461
1462         *buff++ = a->read_csr(ioaddr, 112);
1463         *buff++ = a->read_csr(ioaddr, 114);
1464
1465         /* read bus configuration registers */
1466         for (i = 0; i < 30; i++) {
1467                 *buff++ = a->read_bcr(ioaddr, i);
1468         }
1469         *buff++ = 0;            /* skip bcr30 so as not to hang 79C976 */
1470         for (i = 31; i < 36; i++) {
1471                 *buff++ = a->read_bcr(ioaddr, i);
1472         }
1473
1474         /* read mii phy registers */
1475         if (lp->mii) {
1476                 int j;
1477                 for (j = 0; j < PCNET32_MAX_PHYS; j++) {
1478                         if (lp->phymask & (1 << j)) {
1479                                 for (i = 0; i < PCNET32_REGS_PER_PHY; i++) {
1480                                         lp->a.write_bcr(ioaddr, 33,
1481                                                         (j << 5) | i);
1482                                         *buff++ = lp->a.read_bcr(ioaddr, 34);
1483                                 }
1484                         }
1485                 }
1486         }
1487
1488         if (!(csr0 & CSR0_STOP)) {      /* If not stopped */
1489                 int csr5;
1490
1491                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
1492                 csr5 = a->read_csr(ioaddr, CSR5);
1493                 a->write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
1494         }
1495
1496         spin_unlock_irqrestore(&lp->lock, flags);
1497 }
1498
1499 static const struct ethtool_ops pcnet32_ethtool_ops = {
1500         .get_settings           = pcnet32_get_settings,
1501         .set_settings           = pcnet32_set_settings,
1502         .get_drvinfo            = pcnet32_get_drvinfo,
1503         .get_msglevel           = pcnet32_get_msglevel,
1504         .set_msglevel           = pcnet32_set_msglevel,
1505         .nway_reset             = pcnet32_nway_reset,
1506         .get_link               = pcnet32_get_link,
1507         .get_ringparam          = pcnet32_get_ringparam,
1508         .set_ringparam          = pcnet32_set_ringparam,
1509         .get_tx_csum            = ethtool_op_get_tx_csum,
1510         .get_sg                 = ethtool_op_get_sg,
1511         .get_tso                = ethtool_op_get_tso,
1512         .get_strings            = pcnet32_get_strings,
1513         .self_test_count        = pcnet32_self_test_count,
1514         .self_test              = pcnet32_ethtool_test,
1515         .phys_id                = pcnet32_phys_id,
1516         .get_regs_len           = pcnet32_get_regs_len,
1517         .get_regs               = pcnet32_get_regs,
1518         .get_perm_addr          = ethtool_op_get_perm_addr,
1519 };
1520
1521 /* only probes for non-PCI devices, the rest are handled by
1522  * pci_register_driver via pcnet32_probe_pci */
1523
1524 static void __devinit pcnet32_probe_vlbus(unsigned int *pcnet32_portlist)
1525 {
1526         unsigned int *port, ioaddr;
1527
1528         /* search for PCnet32 VLB cards at known addresses */
1529         for (port = pcnet32_portlist; (ioaddr = *port); port++) {
1530                 if (request_region
1531                     (ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_vlbus")) {
1532                         /* check if there is really a pcnet chip on that ioaddr */
1533                         if ((inb(ioaddr + 14) == 0x57)
1534                             && (inb(ioaddr + 15) == 0x57)) {
1535                                 pcnet32_probe1(ioaddr, 0, NULL);
1536                         } else {
1537                                 release_region(ioaddr, PCNET32_TOTAL_SIZE);
1538                         }
1539                 }
1540         }
1541 }
1542
1543 static int __devinit
1544 pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
1545 {
1546         unsigned long ioaddr;
1547         int err;
1548
1549         err = pci_enable_device(pdev);
1550         if (err < 0) {
1551                 if (pcnet32_debug & NETIF_MSG_PROBE)
1552                         printk(KERN_ERR PFX
1553                                "failed to enable device -- err=%d\n", err);
1554                 return err;
1555         }
1556         pci_set_master(pdev);
1557
1558         ioaddr = pci_resource_start(pdev, 0);
1559         if (!ioaddr) {
1560                 if (pcnet32_debug & NETIF_MSG_PROBE)
1561                         printk(KERN_ERR PFX
1562                                "card has no PCI IO resources, aborting\n");
1563                 return -ENODEV;
1564         }
1565
1566         if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
1567                 if (pcnet32_debug & NETIF_MSG_PROBE)
1568                         printk(KERN_ERR PFX
1569                                "architecture does not support 32bit PCI busmaster DMA\n");
1570                 return -ENODEV;
1571         }
1572         if (request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci") ==
1573             NULL) {
1574                 if (pcnet32_debug & NETIF_MSG_PROBE)
1575                         printk(KERN_ERR PFX
1576                                "io address range already allocated\n");
1577                 return -EBUSY;
1578         }
1579
1580         err = pcnet32_probe1(ioaddr, 1, pdev);
1581         if (err < 0) {
1582                 pci_disable_device(pdev);
1583         }
1584         return err;
1585 }
1586
1587 /* pcnet32_probe1
1588  *  Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
1589  *  pdev will be NULL when called from pcnet32_probe_vlbus.
1590  */
1591 static int __devinit
1592 pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
1593 {
1594         struct pcnet32_private *lp;
1595         int i, media;
1596         int fdx, mii, fset, dxsuflo;
1597         int chip_version;
1598         char *chipname;
1599         struct net_device *dev;
1600         struct pcnet32_access *a = NULL;
1601         u8 promaddr[6];
1602         int ret = -ENODEV;
1603
1604         /* reset the chip */
1605         pcnet32_wio_reset(ioaddr);
1606
1607         /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
1608         if (pcnet32_wio_read_csr(ioaddr, 0) == 4 && pcnet32_wio_check(ioaddr)) {
1609                 a = &pcnet32_wio;
1610         } else {
1611                 pcnet32_dwio_reset(ioaddr);
1612                 if (pcnet32_dwio_read_csr(ioaddr, 0) == 4
1613                     && pcnet32_dwio_check(ioaddr)) {
1614                         a = &pcnet32_dwio;
1615                 } else
1616                         goto err_release_region;
1617         }
1618
1619         chip_version =
1620             a->read_csr(ioaddr, 88) | (a->read_csr(ioaddr, 89) << 16);
1621         if ((pcnet32_debug & NETIF_MSG_PROBE) && (pcnet32_debug & NETIF_MSG_HW))
1622                 printk(KERN_INFO "  PCnet chip version is %#x.\n",
1623                        chip_version);
1624         if ((chip_version & 0xfff) != 0x003) {
1625                 if (pcnet32_debug & NETIF_MSG_PROBE)
1626                         printk(KERN_INFO PFX "Unsupported chip version.\n");
1627                 goto err_release_region;
1628         }
1629
1630         /* initialize variables */
1631         fdx = mii = fset = dxsuflo = 0;
1632         chip_version = (chip_version >> 12) & 0xffff;
1633
1634         switch (chip_version) {
1635         case 0x2420:
1636                 chipname = "PCnet/PCI 79C970";  /* PCI */
1637                 break;
1638         case 0x2430:
1639                 if (shared)
1640                         chipname = "PCnet/PCI 79C970";  /* 970 gives the wrong chip id back */
1641                 else
1642                         chipname = "PCnet/32 79C965";   /* 486/VL bus */
1643                 break;
1644         case 0x2621:
1645                 chipname = "PCnet/PCI II 79C970A";      /* PCI */
1646                 fdx = 1;
1647                 break;
1648         case 0x2623:
1649                 chipname = "PCnet/FAST 79C971"; /* PCI */
1650                 fdx = 1;
1651                 mii = 1;
1652                 fset = 1;
1653                 break;
1654         case 0x2624:
1655                 chipname = "PCnet/FAST+ 79C972";        /* PCI */
1656                 fdx = 1;
1657                 mii = 1;
1658                 fset = 1;
1659                 break;
1660         case 0x2625:
1661                 chipname = "PCnet/FAST III 79C973";     /* PCI */
1662                 fdx = 1;
1663                 mii = 1;
1664                 break;
1665         case 0x2626:
1666                 chipname = "PCnet/Home 79C978"; /* PCI */
1667                 fdx = 1;
1668                 /*
1669                  * This is based on specs published at www.amd.com.  This section
1670                  * assumes that a card with a 79C978 wants to go into standard
1671                  * ethernet mode.  The 79C978 can also go into 1Mb HomePNA mode,
1672                  * and the module option homepna=1 can select this instead.
1673                  */
1674                 media = a->read_bcr(ioaddr, 49);
1675                 media &= ~3;    /* default to 10Mb ethernet */
1676                 if (cards_found < MAX_UNITS && homepna[cards_found])
1677                         media |= 1;     /* switch to home wiring mode */
1678                 if (pcnet32_debug & NETIF_MSG_PROBE)
1679                         printk(KERN_DEBUG PFX "media set to %sMbit mode.\n",
1680                                (media & 1) ? "1" : "10");
1681                 a->write_bcr(ioaddr, 49, media);
1682                 break;
1683         case 0x2627:
1684                 chipname = "PCnet/FAST III 79C975";     /* PCI */
1685                 fdx = 1;
1686                 mii = 1;
1687                 break;
1688         case 0x2628:
1689                 chipname = "PCnet/PRO 79C976";
1690                 fdx = 1;
1691                 mii = 1;
1692                 break;
1693         default:
1694                 if (pcnet32_debug & NETIF_MSG_PROBE)
1695                         printk(KERN_INFO PFX
1696                                "PCnet version %#x, no PCnet32 chip.\n",
1697                                chip_version);
1698                 goto err_release_region;
1699         }
1700
1701         /*
1702          *  On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
1703          *  starting until the packet is loaded. Strike one for reliability, lose
1704          *  one for latency - although on PCI this isnt a big loss. Older chips
1705          *  have FIFO's smaller than a packet, so you can't do this.
1706          *  Turn on BCR18:BurstRdEn and BCR18:BurstWrEn.
1707          */
1708
1709         if (fset) {
1710                 a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0860));
1711                 a->write_csr(ioaddr, 80,
1712                              (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
1713                 dxsuflo = 1;
1714         }
1715
1716         dev = alloc_etherdev(sizeof(*lp));
1717         if (!dev) {
1718                 if (pcnet32_debug & NETIF_MSG_PROBE)
1719                         printk(KERN_ERR PFX "Memory allocation failed.\n");
1720                 ret = -ENOMEM;
1721                 goto err_release_region;
1722         }
1723         SET_NETDEV_DEV(dev, &pdev->dev);
1724
1725         if (pcnet32_debug & NETIF_MSG_PROBE)
1726                 printk(KERN_INFO PFX "%s at %#3lx,", chipname, ioaddr);
1727
1728         /* In most chips, after a chip reset, the ethernet address is read from the
1729          * station address PROM at the base address and programmed into the
1730          * "Physical Address Registers" CSR12-14.
1731          * As a precautionary measure, we read the PROM values and complain if
1732          * they disagree with the CSRs.  If they miscompare, and the PROM addr
1733          * is valid, then the PROM addr is used.
1734          */
1735         for (i = 0; i < 3; i++) {
1736                 unsigned int val;
1737                 val = a->read_csr(ioaddr, i + 12) & 0x0ffff;
1738                 /* There may be endianness issues here. */
1739                 dev->dev_addr[2 * i] = val & 0x0ff;
1740                 dev->dev_addr[2 * i + 1] = (val >> 8) & 0x0ff;
1741         }
1742
1743         /* read PROM address and compare with CSR address */
1744         for (i = 0; i < 6; i++)
1745                 promaddr[i] = inb(ioaddr + i);
1746
1747         if (memcmp(promaddr, dev->dev_addr, 6)
1748             || !is_valid_ether_addr(dev->dev_addr)) {
1749                 if (is_valid_ether_addr(promaddr)) {
1750                         if (pcnet32_debug & NETIF_MSG_PROBE) {
1751                                 printk(" warning: CSR address invalid,\n");
1752                                 printk(KERN_INFO
1753                                        "    using instead PROM address of");
1754                         }
1755                         memcpy(dev->dev_addr, promaddr, 6);
1756                 }
1757         }
1758         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1759
1760         /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
1761         if (!is_valid_ether_addr(dev->perm_addr))
1762                 memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
1763
1764         if (pcnet32_debug & NETIF_MSG_PROBE) {
1765                 for (i = 0; i < 6; i++)
1766                         printk(" %2.2x", dev->dev_addr[i]);
1767
1768                 /* Version 0x2623 and 0x2624 */
1769                 if (((chip_version + 1) & 0xfffe) == 0x2624) {
1770                         i = a->read_csr(ioaddr, 80) & 0x0C00;   /* Check tx_start_pt */
1771                         printk("\n" KERN_INFO "    tx_start_pt(0x%04x):", i);
1772                         switch (i >> 10) {
1773                         case 0:
1774                                 printk("  20 bytes,");
1775                                 break;
1776                         case 1:
1777                                 printk("  64 bytes,");
1778                                 break;
1779                         case 2:
1780                                 printk(" 128 bytes,");
1781                                 break;
1782                         case 3:
1783                                 printk("~220 bytes,");
1784                                 break;
1785                         }
1786                         i = a->read_bcr(ioaddr, 18);    /* Check Burst/Bus control */
1787                         printk(" BCR18(%x):", i & 0xffff);
1788                         if (i & (1 << 5))
1789                                 printk("BurstWrEn ");
1790                         if (i & (1 << 6))
1791                                 printk("BurstRdEn ");
1792                         if (i & (1 << 7))
1793                                 printk("DWordIO ");
1794                         if (i & (1 << 11))
1795                                 printk("NoUFlow ");
1796                         i = a->read_bcr(ioaddr, 25);
1797                         printk("\n" KERN_INFO "    SRAMSIZE=0x%04x,", i << 8);
1798                         i = a->read_bcr(ioaddr, 26);
1799                         printk(" SRAM_BND=0x%04x,", i << 8);
1800                         i = a->read_bcr(ioaddr, 27);
1801                         if (i & (1 << 14))
1802                                 printk("LowLatRx");
1803                 }
1804         }
1805
1806         dev->base_addr = ioaddr;
1807         lp = netdev_priv(dev);
1808         /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
1809         if ((lp->init_block =
1810              pci_alloc_consistent(pdev, sizeof(*lp->init_block), &lp->init_dma_addr)) == NULL) {
1811                 if (pcnet32_debug & NETIF_MSG_PROBE)
1812                         printk(KERN_ERR PFX
1813                                "Consistent memory allocation failed.\n");
1814                 ret = -ENOMEM;
1815                 goto err_free_netdev;
1816         }
1817         lp->pci_dev = pdev;
1818
1819         spin_lock_init(&lp->lock);
1820
1821         SET_MODULE_OWNER(dev);
1822         SET_NETDEV_DEV(dev, &pdev->dev);
1823         lp->name = chipname;
1824         lp->shared_irq = shared;
1825         lp->tx_ring_size = TX_RING_SIZE;        /* default tx ring size */
1826         lp->rx_ring_size = RX_RING_SIZE;        /* default rx ring size */
1827         lp->tx_mod_mask = lp->tx_ring_size - 1;
1828         lp->rx_mod_mask = lp->rx_ring_size - 1;
1829         lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
1830         lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
1831         lp->mii_if.full_duplex = fdx;
1832         lp->mii_if.phy_id_mask = 0x1f;
1833         lp->mii_if.reg_num_mask = 0x1f;
1834         lp->dxsuflo = dxsuflo;
1835         lp->mii = mii;
1836         lp->chip_version = chip_version;
1837         lp->msg_enable = pcnet32_debug;
1838         if ((cards_found >= MAX_UNITS)
1839             || (options[cards_found] > sizeof(options_mapping)))
1840                 lp->options = PCNET32_PORT_ASEL;
1841         else
1842                 lp->options = options_mapping[options[cards_found]];
1843         lp->mii_if.dev = dev;
1844         lp->mii_if.mdio_read = mdio_read;
1845         lp->mii_if.mdio_write = mdio_write;
1846
1847         if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
1848             ((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
1849                 lp->options |= PCNET32_PORT_FD;
1850
1851         if (!a) {
1852                 if (pcnet32_debug & NETIF_MSG_PROBE)
1853                         printk(KERN_ERR PFX "No access methods\n");
1854                 ret = -ENODEV;
1855                 goto err_free_consistent;
1856         }
1857         lp->a = *a;
1858
1859         /* prior to register_netdev, dev->name is not yet correct */
1860         if (pcnet32_alloc_ring(dev, pci_name(lp->pci_dev))) {
1861                 ret = -ENOMEM;
1862                 goto err_free_ring;
1863         }
1864         /* detect special T1/E1 WAN card by checking for MAC address */
1865         if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0
1866             && dev->dev_addr[2] == 0x75)
1867                 lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
1868
1869         lp->init_block->mode = le16_to_cpu(0x0003);     /* Disable Rx and Tx. */
1870         lp->init_block->tlen_rlen =
1871             le16_to_cpu(lp->tx_len_bits | lp->rx_len_bits);
1872         for (i = 0; i < 6; i++)
1873                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
1874         lp->init_block->filter[0] = 0x00000000;
1875         lp->init_block->filter[1] = 0x00000000;
1876         lp->init_block->rx_ring = (u32) le32_to_cpu(lp->rx_ring_dma_addr);
1877         lp->init_block->tx_ring = (u32) le32_to_cpu(lp->tx_ring_dma_addr);
1878
1879         /* switch pcnet32 to 32bit mode */
1880         a->write_bcr(ioaddr, 20, 2);
1881
1882         a->write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
1883         a->write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
1884
1885         if (pdev) {             /* use the IRQ provided by PCI */
1886                 dev->irq = pdev->irq;
1887                 if (pcnet32_debug & NETIF_MSG_PROBE)
1888                         printk(" assigned IRQ %d.\n", dev->irq);
1889         } else {
1890                 unsigned long irq_mask = probe_irq_on();
1891
1892                 /*
1893                  * To auto-IRQ we enable the initialization-done and DMA error
1894                  * interrupts. For ISA boards we get a DMA error, but VLB and PCI
1895                  * boards will work.
1896                  */
1897                 /* Trigger an initialization just for the interrupt. */
1898                 a->write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_INIT);
1899                 mdelay(1);
1900
1901                 dev->irq = probe_irq_off(irq_mask);
1902                 if (!dev->irq) {
1903                         if (pcnet32_debug & NETIF_MSG_PROBE)
1904                                 printk(", failed to detect IRQ line.\n");
1905                         ret = -ENODEV;
1906                         goto err_free_ring;
1907                 }
1908                 if (pcnet32_debug & NETIF_MSG_PROBE)
1909                         printk(", probed IRQ %d.\n", dev->irq);
1910         }
1911
1912         /* Set the mii phy_id so that we can query the link state */
1913         if (lp->mii) {
1914                 /* lp->phycount and lp->phymask are set to 0 by memset above */
1915
1916                 lp->mii_if.phy_id = ((lp->a.read_bcr(ioaddr, 33)) >> 5) & 0x1f;
1917                 /* scan for PHYs */
1918                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1919                         unsigned short id1, id2;
1920
1921                         id1 = mdio_read(dev, i, MII_PHYSID1);
1922                         if (id1 == 0xffff)
1923                                 continue;
1924                         id2 = mdio_read(dev, i, MII_PHYSID2);
1925                         if (id2 == 0xffff)
1926                                 continue;
1927                         if (i == 31 && ((chip_version + 1) & 0xfffe) == 0x2624)
1928                                 continue;       /* 79C971 & 79C972 have phantom phy at id 31 */
1929                         lp->phycount++;
1930                         lp->phymask |= (1 << i);
1931                         lp->mii_if.phy_id = i;
1932                         if (pcnet32_debug & NETIF_MSG_PROBE)
1933                                 printk(KERN_INFO PFX
1934                                        "Found PHY %04x:%04x at address %d.\n",
1935                                        id1, id2, i);
1936                 }
1937                 lp->a.write_bcr(ioaddr, 33, (lp->mii_if.phy_id) << 5);
1938                 if (lp->phycount > 1) {
1939                         lp->options |= PCNET32_PORT_MII;
1940                 }
1941         }
1942
1943         init_timer(&lp->watchdog_timer);
1944         lp->watchdog_timer.data = (unsigned long)dev;
1945         lp->watchdog_timer.function = (void *)&pcnet32_watchdog;
1946
1947         /* The PCNET32-specific entries in the device structure. */
1948         dev->open = &pcnet32_open;
1949         dev->hard_start_xmit = &pcnet32_start_xmit;
1950         dev->stop = &pcnet32_close;
1951         dev->get_stats = &pcnet32_get_stats;
1952         dev->set_multicast_list = &pcnet32_set_multicast_list;
1953         dev->do_ioctl = &pcnet32_ioctl;
1954         dev->ethtool_ops = &pcnet32_ethtool_ops;
1955         dev->tx_timeout = pcnet32_tx_timeout;
1956         dev->watchdog_timeo = (5 * HZ);
1957         dev->weight = lp->rx_ring_size / 2;
1958 #ifdef CONFIG_PCNET32_NAPI
1959         dev->poll = pcnet32_poll;
1960 #endif
1961
1962 #ifdef CONFIG_NET_POLL_CONTROLLER
1963         dev->poll_controller = pcnet32_poll_controller;
1964 #endif
1965
1966         /* Fill in the generic fields of the device structure. */
1967         if (register_netdev(dev))
1968                 goto err_free_ring;
1969
1970         if (pdev) {
1971                 pci_set_drvdata(pdev, dev);
1972         } else {
1973                 lp->next = pcnet32_dev;
1974                 pcnet32_dev = dev;
1975         }
1976
1977         if (pcnet32_debug & NETIF_MSG_PROBE)
1978                 printk(KERN_INFO "%s: registered as %s\n", dev->name, lp->name);
1979         cards_found++;
1980
1981         /* enable LED writes */
1982         a->write_bcr(ioaddr, 2, a->read_bcr(ioaddr, 2) | 0x1000);
1983
1984         return 0;
1985
1986       err_free_ring:
1987         pcnet32_free_ring(dev);
1988       err_free_consistent:
1989         pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
1990                             lp->init_block, lp->init_dma_addr);
1991       err_free_netdev:
1992         free_netdev(dev);
1993       err_release_region:
1994         release_region(ioaddr, PCNET32_TOTAL_SIZE);
1995         return ret;
1996 }
1997
1998 /* if any allocation fails, caller must also call pcnet32_free_ring */
1999 static int pcnet32_alloc_ring(struct net_device *dev, char *name)
2000 {
2001         struct pcnet32_private *lp = netdev_priv(dev);
2002
2003         lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
2004                                            sizeof(struct pcnet32_tx_head) *
2005                                            lp->tx_ring_size,
2006                                            &lp->tx_ring_dma_addr);
2007         if (lp->tx_ring == NULL) {
2008                 if (netif_msg_drv(lp))
2009                         printk("\n" KERN_ERR PFX
2010                                "%s: Consistent memory allocation failed.\n",
2011                                name);
2012                 return -ENOMEM;
2013         }
2014
2015         lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
2016                                            sizeof(struct pcnet32_rx_head) *
2017                                            lp->rx_ring_size,
2018                                            &lp->rx_ring_dma_addr);
2019         if (lp->rx_ring == NULL) {
2020                 if (netif_msg_drv(lp))
2021                         printk("\n" KERN_ERR PFX
2022                                "%s: Consistent memory allocation failed.\n",
2023                                name);
2024                 return -ENOMEM;
2025         }
2026
2027         lp->tx_dma_addr = kcalloc(lp->tx_ring_size, sizeof(dma_addr_t),
2028                                   GFP_ATOMIC);
2029         if (!lp->tx_dma_addr) {
2030                 if (netif_msg_drv(lp))
2031                         printk("\n" KERN_ERR PFX
2032                                "%s: Memory allocation failed.\n", name);
2033                 return -ENOMEM;
2034         }
2035
2036         lp->rx_dma_addr = kcalloc(lp->rx_ring_size, sizeof(dma_addr_t),
2037                                   GFP_ATOMIC);
2038         if (!lp->rx_dma_addr) {
2039                 if (netif_msg_drv(lp))
2040                         printk("\n" KERN_ERR PFX
2041                                "%s: Memory allocation failed.\n", name);
2042                 return -ENOMEM;
2043         }
2044
2045         lp->tx_skbuff = kcalloc(lp->tx_ring_size, sizeof(struct sk_buff *),
2046                                 GFP_ATOMIC);
2047         if (!lp->tx_skbuff) {
2048                 if (netif_msg_drv(lp))
2049                         printk("\n" KERN_ERR PFX
2050                                "%s: Memory allocation failed.\n", name);
2051                 return -ENOMEM;
2052         }
2053
2054         lp->rx_skbuff = kcalloc(lp->rx_ring_size, sizeof(struct sk_buff *),
2055                                 GFP_ATOMIC);
2056         if (!lp->rx_skbuff) {
2057                 if (netif_msg_drv(lp))
2058                         printk("\n" KERN_ERR PFX
2059                                "%s: Memory allocation failed.\n", name);
2060                 return -ENOMEM;
2061         }
2062
2063         return 0;
2064 }
2065
2066 static void pcnet32_free_ring(struct net_device *dev)
2067 {
2068         struct pcnet32_private *lp = netdev_priv(dev);
2069
2070         kfree(lp->tx_skbuff);
2071         lp->tx_skbuff = NULL;
2072
2073         kfree(lp->rx_skbuff);
2074         lp->rx_skbuff = NULL;
2075
2076         kfree(lp->tx_dma_addr);
2077         lp->tx_dma_addr = NULL;
2078
2079         kfree(lp->rx_dma_addr);
2080         lp->rx_dma_addr = NULL;
2081
2082         if (lp->tx_ring) {
2083                 pci_free_consistent(lp->pci_dev,
2084                                     sizeof(struct pcnet32_tx_head) *
2085                                     lp->tx_ring_size, lp->tx_ring,
2086                                     lp->tx_ring_dma_addr);
2087                 lp->tx_ring = NULL;
2088         }
2089
2090         if (lp->rx_ring) {
2091                 pci_free_consistent(lp->pci_dev,
2092                                     sizeof(struct pcnet32_rx_head) *
2093                                     lp->rx_ring_size, lp->rx_ring,
2094                                     lp->rx_ring_dma_addr);
2095                 lp->rx_ring = NULL;
2096         }
2097 }
2098
2099 static int pcnet32_open(struct net_device *dev)
2100 {
2101         struct pcnet32_private *lp = netdev_priv(dev);
2102         unsigned long ioaddr = dev->base_addr;
2103         u16 val;
2104         int i;
2105         int rc;
2106         unsigned long flags;
2107
2108         if (request_irq(dev->irq, &pcnet32_interrupt,
2109                         lp->shared_irq ? IRQF_SHARED : 0, dev->name,
2110                         (void *)dev)) {
2111                 return -EAGAIN;
2112         }
2113
2114         spin_lock_irqsave(&lp->lock, flags);
2115         /* Check for a valid station address */
2116         if (!is_valid_ether_addr(dev->dev_addr)) {
2117                 rc = -EINVAL;
2118                 goto err_free_irq;
2119         }
2120
2121         /* Reset the PCNET32 */
2122         lp->a.reset(ioaddr);
2123
2124         /* switch pcnet32 to 32bit mode */
2125         lp->a.write_bcr(ioaddr, 20, 2);
2126
2127         if (netif_msg_ifup(lp))
2128                 printk(KERN_DEBUG
2129                        "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n",
2130                        dev->name, dev->irq, (u32) (lp->tx_ring_dma_addr),
2131                        (u32) (lp->rx_ring_dma_addr),
2132                        (u32) (lp->init_dma_addr));
2133
2134         /* set/reset autoselect bit */
2135         val = lp->a.read_bcr(ioaddr, 2) & ~2;
2136         if (lp->options & PCNET32_PORT_ASEL)
2137                 val |= 2;
2138         lp->a.write_bcr(ioaddr, 2, val);
2139
2140         /* handle full duplex setting */
2141         if (lp->mii_if.full_duplex) {
2142                 val = lp->a.read_bcr(ioaddr, 9) & ~3;
2143                 if (lp->options & PCNET32_PORT_FD) {
2144                         val |= 1;
2145                         if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
2146                                 val |= 2;
2147                 } else if (lp->options & PCNET32_PORT_ASEL) {
2148                         /* workaround of xSeries250, turn on for 79C975 only */
2149                         if (lp->chip_version == 0x2627)
2150                                 val |= 3;
2151                 }
2152                 lp->a.write_bcr(ioaddr, 9, val);
2153         }
2154
2155         /* set/reset GPSI bit in test register */
2156         val = lp->a.read_csr(ioaddr, 124) & ~0x10;
2157         if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
2158                 val |= 0x10;
2159         lp->a.write_csr(ioaddr, 124, val);
2160
2161         /* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
2162         if (lp->pci_dev->subsystem_vendor == PCI_VENDOR_ID_AT &&
2163             (lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
2164              lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
2165                 if (lp->options & PCNET32_PORT_ASEL) {
2166                         lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
2167                         if (netif_msg_link(lp))
2168                                 printk(KERN_DEBUG
2169                                        "%s: Setting 100Mb-Full Duplex.\n",
2170                                        dev->name);
2171                 }
2172         }
2173         if (lp->phycount < 2) {
2174                 /*
2175                  * 24 Jun 2004 according AMD, in order to change the PHY,
2176                  * DANAS (or DISPM for 79C976) must be set; then select the speed,
2177                  * duplex, and/or enable auto negotiation, and clear DANAS
2178                  */
2179                 if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
2180                         lp->a.write_bcr(ioaddr, 32,
2181                                         lp->a.read_bcr(ioaddr, 32) | 0x0080);
2182                         /* disable Auto Negotiation, set 10Mpbs, HD */
2183                         val = lp->a.read_bcr(ioaddr, 32) & ~0xb8;
2184                         if (lp->options & PCNET32_PORT_FD)
2185                                 val |= 0x10;
2186                         if (lp->options & PCNET32_PORT_100)
2187                                 val |= 0x08;
2188                         lp->a.write_bcr(ioaddr, 32, val);
2189                 } else {
2190                         if (lp->options & PCNET32_PORT_ASEL) {
2191                                 lp->a.write_bcr(ioaddr, 32,
2192                                                 lp->a.read_bcr(ioaddr,
2193                                                                32) | 0x0080);
2194                                 /* enable auto negotiate, setup, disable fd */
2195                                 val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
2196                                 val |= 0x20;
2197                                 lp->a.write_bcr(ioaddr, 32, val);
2198                         }
2199                 }
2200         } else {
2201                 int first_phy = -1;
2202                 u16 bmcr;
2203                 u32 bcr9;
2204                 struct ethtool_cmd ecmd;
2205
2206                 /*
2207                  * There is really no good other way to handle multiple PHYs
2208                  * other than turning off all automatics
2209                  */
2210                 val = lp->a.read_bcr(ioaddr, 2);
2211                 lp->a.write_bcr(ioaddr, 2, val & ~2);
2212                 val = lp->a.read_bcr(ioaddr, 32);
2213                 lp->a.write_bcr(ioaddr, 32, val & ~(1 << 7));   /* stop MII manager */
2214
2215                 if (!(lp->options & PCNET32_PORT_ASEL)) {
2216                         /* setup ecmd */
2217                         ecmd.port = PORT_MII;
2218                         ecmd.transceiver = XCVR_INTERNAL;
2219                         ecmd.autoneg = AUTONEG_DISABLE;
2220                         ecmd.speed =
2221                             lp->
2222                             options & PCNET32_PORT_100 ? SPEED_100 : SPEED_10;
2223                         bcr9 = lp->a.read_bcr(ioaddr, 9);
2224
2225                         if (lp->options & PCNET32_PORT_FD) {
2226                                 ecmd.duplex = DUPLEX_FULL;
2227                                 bcr9 |= (1 << 0);
2228                         } else {
2229                                 ecmd.duplex = DUPLEX_HALF;
2230                                 bcr9 |= ~(1 << 0);
2231                         }
2232                         lp->a.write_bcr(ioaddr, 9, bcr9);
2233                 }
2234
2235                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2236                         if (lp->phymask & (1 << i)) {
2237                                 /* isolate all but the first PHY */
2238                                 bmcr = mdio_read(dev, i, MII_BMCR);
2239                                 if (first_phy == -1) {
2240                                         first_phy = i;
2241                                         mdio_write(dev, i, MII_BMCR,
2242                                                    bmcr & ~BMCR_ISOLATE);
2243                                 } else {
2244                                         mdio_write(dev, i, MII_BMCR,
2245                                                    bmcr | BMCR_ISOLATE);
2246                                 }
2247                                 /* use mii_ethtool_sset to setup PHY */
2248                                 lp->mii_if.phy_id = i;
2249                                 ecmd.phy_address = i;
2250                                 if (lp->options & PCNET32_PORT_ASEL) {
2251                                         mii_ethtool_gset(&lp->mii_if, &ecmd);
2252                                         ecmd.autoneg = AUTONEG_ENABLE;
2253                                 }
2254                                 mii_ethtool_sset(&lp->mii_if, &ecmd);
2255                         }
2256                 }
2257                 lp->mii_if.phy_id = first_phy;
2258                 if (netif_msg_link(lp))
2259                         printk(KERN_INFO "%s: Using PHY number %d.\n",
2260                                dev->name, first_phy);
2261         }
2262
2263 #ifdef DO_DXSUFLO
2264         if (lp->dxsuflo) {      /* Disable transmit stop on underflow */
2265                 val = lp->a.read_csr(ioaddr, CSR3);
2266                 val |= 0x40;
2267                 lp->a.write_csr(ioaddr, CSR3, val);
2268         }
2269 #endif
2270
2271         lp->init_block->mode =
2272             le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
2273         pcnet32_load_multicast(dev);
2274
2275         if (pcnet32_init_ring(dev)) {
2276                 rc = -ENOMEM;
2277                 goto err_free_ring;
2278         }
2279
2280         /* Re-initialize the PCNET32, and start it when done. */
2281         lp->a.write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
2282         lp->a.write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
2283
2284         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
2285         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2286
2287         netif_start_queue(dev);
2288
2289         if (lp->chip_version >= PCNET32_79C970A) {
2290                 /* Print the link status and start the watchdog */
2291                 pcnet32_check_media(dev, 1);
2292                 mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2293         }
2294
2295         i = 0;
2296         while (i++ < 100)
2297                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2298                         break;
2299         /*
2300          * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
2301          * reports that doing so triggers a bug in the '974.
2302          */
2303         lp->a.write_csr(ioaddr, CSR0, CSR0_NORMAL);
2304
2305         if (netif_msg_ifup(lp))
2306                 printk(KERN_DEBUG
2307                        "%s: pcnet32 open after %d ticks, init block %#x csr0 %4.4x.\n",
2308                        dev->name, i,
2309                        (u32) (lp->init_dma_addr),
2310                        lp->a.read_csr(ioaddr, CSR0));
2311
2312         spin_unlock_irqrestore(&lp->lock, flags);
2313
2314         return 0;               /* Always succeed */
2315
2316       err_free_ring:
2317         /* free any allocated skbuffs */
2318         pcnet32_purge_rx_ring(dev);
2319
2320         /*
2321          * Switch back to 16bit mode to avoid problems with dumb
2322          * DOS packet driver after a warm reboot
2323          */
2324         lp->a.write_bcr(ioaddr, 20, 4);
2325
2326       err_free_irq:
2327         spin_unlock_irqrestore(&lp->lock, flags);
2328         free_irq(dev->irq, dev);
2329         return rc;
2330 }
2331
2332 /*
2333  * The LANCE has been halted for one reason or another (busmaster memory
2334  * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
2335  * etc.).  Modern LANCE variants always reload their ring-buffer
2336  * configuration when restarted, so we must reinitialize our ring
2337  * context before restarting.  As part of this reinitialization,
2338  * find all packets still on the Tx ring and pretend that they had been
2339  * sent (in effect, drop the packets on the floor) - the higher-level
2340  * protocols will time out and retransmit.  It'd be better to shuffle
2341  * these skbs to a temp list and then actually re-Tx them after
2342  * restarting the chip, but I'm too lazy to do so right now.  dplatt@3do.com
2343  */
2344
2345 static void pcnet32_purge_tx_ring(struct net_device *dev)
2346 {
2347         struct pcnet32_private *lp = netdev_priv(dev);
2348         int i;
2349
2350         for (i = 0; i < lp->tx_ring_size; i++) {
2351                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2352                 wmb();          /* Make sure adapter sees owner change */
2353                 if (lp->tx_skbuff[i]) {
2354                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i],
2355                                          lp->tx_skbuff[i]->len,
2356                                          PCI_DMA_TODEVICE);
2357                         dev_kfree_skb_any(lp->tx_skbuff[i]);
2358                 }
2359                 lp->tx_skbuff[i] = NULL;
2360                 lp->tx_dma_addr[i] = 0;
2361         }
2362 }
2363
2364 /* Initialize the PCNET32 Rx and Tx rings. */
2365 static int pcnet32_init_ring(struct net_device *dev)
2366 {
2367         struct pcnet32_private *lp = netdev_priv(dev);
2368         int i;
2369
2370         lp->tx_full = 0;
2371         lp->cur_rx = lp->cur_tx = 0;
2372         lp->dirty_rx = lp->dirty_tx = 0;
2373
2374         for (i = 0; i < lp->rx_ring_size; i++) {
2375                 struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
2376                 if (rx_skbuff == NULL) {
2377                         if (!
2378                             (rx_skbuff = lp->rx_skbuff[i] =
2379                              dev_alloc_skb(PKT_BUF_SZ))) {
2380                                 /* there is not much, we can do at this point */
2381                                 if (netif_msg_drv(lp))
2382                                         printk(KERN_ERR
2383                                                "%s: pcnet32_init_ring dev_alloc_skb failed.\n",
2384                                                dev->name);
2385                                 return -1;
2386                         }
2387                         skb_reserve(rx_skbuff, 2);
2388                 }
2389
2390                 rmb();
2391                 if (lp->rx_dma_addr[i] == 0)
2392                         lp->rx_dma_addr[i] =
2393                             pci_map_single(lp->pci_dev, rx_skbuff->data,
2394                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
2395                 lp->rx_ring[i].base = (u32) le32_to_cpu(lp->rx_dma_addr[i]);
2396                 lp->rx_ring[i].buf_length = le16_to_cpu(2 - PKT_BUF_SZ);
2397                 wmb();          /* Make sure owner changes after all others are visible */
2398                 lp->rx_ring[i].status = le16_to_cpu(0x8000);
2399         }
2400         /* The Tx buffer address is filled in as needed, but we do need to clear
2401          * the upper ownership bit. */
2402         for (i = 0; i < lp->tx_ring_size; i++) {
2403                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2404                 wmb();          /* Make sure adapter sees owner change */
2405                 lp->tx_ring[i].base = 0;
2406                 lp->tx_dma_addr[i] = 0;
2407         }
2408
2409         lp->init_block->tlen_rlen =
2410             le16_to_cpu(lp->tx_len_bits | lp->rx_len_bits);
2411         for (i = 0; i < 6; i++)
2412                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
2413         lp->init_block->rx_ring = (u32) le32_to_cpu(lp->rx_ring_dma_addr);
2414         lp->init_block->tx_ring = (u32) le32_to_cpu(lp->tx_ring_dma_addr);
2415         wmb();                  /* Make sure all changes are visible */
2416         return 0;
2417 }
2418
2419 /* the pcnet32 has been issued a stop or reset.  Wait for the stop bit
2420  * then flush the pending transmit operations, re-initialize the ring,
2421  * and tell the chip to initialize.
2422  */
2423 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
2424 {
2425         struct pcnet32_private *lp = netdev_priv(dev);
2426         unsigned long ioaddr = dev->base_addr;
2427         int i;
2428
2429         /* wait for stop */
2430         for (i = 0; i < 100; i++)
2431                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_STOP)
2432                         break;
2433
2434         if (i >= 100 && netif_msg_drv(lp))
2435                 printk(KERN_ERR
2436                        "%s: pcnet32_restart timed out waiting for stop.\n",
2437                        dev->name);
2438
2439         pcnet32_purge_tx_ring(dev);
2440         if (pcnet32_init_ring(dev))
2441                 return;
2442
2443         /* ReInit Ring */
2444         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2445         i = 0;
2446         while (i++ < 1000)
2447                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2448                         break;
2449
2450         lp->a.write_csr(ioaddr, CSR0, csr0_bits);
2451 }
2452
2453 static void pcnet32_tx_timeout(struct net_device *dev)
2454 {
2455         struct pcnet32_private *lp = netdev_priv(dev);
2456         unsigned long ioaddr = dev->base_addr, flags;
2457
2458         spin_lock_irqsave(&lp->lock, flags);
2459         /* Transmitter timeout, serious problems. */
2460         if (pcnet32_debug & NETIF_MSG_DRV)
2461                 printk(KERN_ERR
2462                        "%s: transmit timed out, status %4.4x, resetting.\n",
2463                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2464         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2465         lp->stats.tx_errors++;
2466         if (netif_msg_tx_err(lp)) {
2467                 int i;
2468                 printk(KERN_DEBUG
2469                        " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
2470                        lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
2471                        lp->cur_rx);
2472                 for (i = 0; i < lp->rx_ring_size; i++)
2473                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2474                                le32_to_cpu(lp->rx_ring[i].base),
2475                                (-le16_to_cpu(lp->rx_ring[i].buf_length)) &
2476                                0xffff, le32_to_cpu(lp->rx_ring[i].msg_length),
2477                                le16_to_cpu(lp->rx_ring[i].status));
2478                 for (i = 0; i < lp->tx_ring_size; i++)
2479                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2480                                le32_to_cpu(lp->tx_ring[i].base),
2481                                (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
2482                                le32_to_cpu(lp->tx_ring[i].misc),
2483                                le16_to_cpu(lp->tx_ring[i].status));
2484                 printk("\n");
2485         }
2486         pcnet32_restart(dev, CSR0_NORMAL);
2487
2488         dev->trans_start = jiffies;
2489         netif_wake_queue(dev);
2490
2491         spin_unlock_irqrestore(&lp->lock, flags);
2492 }
2493
2494 static int pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
2495 {
2496         struct pcnet32_private *lp = netdev_priv(dev);
2497         unsigned long ioaddr = dev->base_addr;
2498         u16 status;
2499         int entry;
2500         unsigned long flags;
2501
2502         spin_lock_irqsave(&lp->lock, flags);
2503
2504         if (netif_msg_tx_queued(lp)) {
2505                 printk(KERN_DEBUG
2506                        "%s: pcnet32_start_xmit() called, csr0 %4.4x.\n",
2507                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2508         }
2509
2510         /* Default status -- will not enable Successful-TxDone
2511          * interrupt when that option is available to us.
2512          */
2513         status = 0x8300;
2514
2515         /* Fill in a Tx ring entry */
2516
2517         /* Mask to ring buffer boundary. */
2518         entry = lp->cur_tx & lp->tx_mod_mask;
2519
2520         /* Caution: the write order is important here, set the status
2521          * with the "ownership" bits last. */
2522
2523         lp->tx_ring[entry].length = le16_to_cpu(-skb->len);
2524
2525         lp->tx_ring[entry].misc = 0x00000000;
2526
2527         lp->tx_skbuff[entry] = skb;
2528         lp->tx_dma_addr[entry] =
2529             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2530         lp->tx_ring[entry].base = (u32) le32_to_cpu(lp->tx_dma_addr[entry]);
2531         wmb();                  /* Make sure owner changes after all others are visible */
2532         lp->tx_ring[entry].status = le16_to_cpu(status);
2533
2534         lp->cur_tx++;
2535         lp->stats.tx_bytes += skb->len;
2536
2537         /* Trigger an immediate send poll. */
2538         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_TXPOLL);
2539
2540         dev->trans_start = jiffies;
2541
2542         if (lp->tx_ring[(entry + 1) & lp->tx_mod_mask].base != 0) {
2543                 lp->tx_full = 1;
2544                 netif_stop_queue(dev);
2545         }
2546         spin_unlock_irqrestore(&lp->lock, flags);
2547         return 0;
2548 }
2549
2550 /* The PCNET32 interrupt handler. */
2551 static irqreturn_t
2552 pcnet32_interrupt(int irq, void *dev_id)
2553 {
2554         struct net_device *dev = dev_id;
2555         struct pcnet32_private *lp;
2556         unsigned long ioaddr;
2557         u16 csr0;
2558         int boguscnt = max_interrupt_work;
2559
2560         ioaddr = dev->base_addr;
2561         lp = netdev_priv(dev);
2562
2563         spin_lock(&lp->lock);
2564
2565         csr0 = lp->a.read_csr(ioaddr, CSR0);
2566         while ((csr0 & 0x8f00) && --boguscnt >= 0) {
2567                 if (csr0 == 0xffff) {
2568                         break;  /* PCMCIA remove happened */
2569                 }
2570                 /* Acknowledge all of the current interrupt sources ASAP. */
2571                 lp->a.write_csr(ioaddr, CSR0, csr0 & ~0x004f);
2572
2573                 if (netif_msg_intr(lp))
2574                         printk(KERN_DEBUG
2575                                "%s: interrupt  csr0=%#2.2x new csr=%#2.2x.\n",
2576                                dev->name, csr0, lp->a.read_csr(ioaddr, CSR0));
2577
2578                 /* Log misc errors. */
2579                 if (csr0 & 0x4000)
2580                         lp->stats.tx_errors++;  /* Tx babble. */
2581                 if (csr0 & 0x1000) {
2582                         /*
2583                          * This happens when our receive ring is full. This
2584                          * shouldn't be a problem as we will see normal rx
2585                          * interrupts for the frames in the receive ring.  But
2586                          * there are some PCI chipsets (I can reproduce this
2587                          * on SP3G with Intel saturn chipset) which have
2588                          * sometimes problems and will fill up the receive
2589                          * ring with error descriptors.  In this situation we
2590                          * don't get a rx interrupt, but a missed frame
2591                          * interrupt sooner or later.
2592                          */
2593                         lp->stats.rx_errors++;  /* Missed a Rx frame. */
2594                 }
2595                 if (csr0 & 0x0800) {
2596                         if (netif_msg_drv(lp))
2597                                 printk(KERN_ERR
2598                                        "%s: Bus master arbitration failure, status %4.4x.\n",
2599                                        dev->name, csr0);
2600                         /* unlike for the lance, there is no restart needed */
2601                 }
2602 #ifdef CONFIG_PCNET32_NAPI
2603                 if (netif_rx_schedule_prep(dev)) {
2604                         u16 val;
2605                         /* set interrupt masks */
2606                         val = lp->a.read_csr(ioaddr, CSR3);
2607                         val |= 0x5f00;
2608                         lp->a.write_csr(ioaddr, CSR3, val);
2609                         mmiowb();
2610                         __netif_rx_schedule(dev);
2611                         break;
2612                 }
2613 #else
2614                 pcnet32_rx(dev, dev->weight);
2615                 if (pcnet32_tx(dev)) {
2616                         /* reset the chip to clear the error condition, then restart */
2617                         lp->a.reset(ioaddr);
2618                         lp->a.write_csr(ioaddr, CSR4, 0x0915); /* auto tx pad */
2619                         pcnet32_restart(dev, CSR0_START);
2620                         netif_wake_queue(dev);
2621                 }
2622 #endif
2623                 csr0 = lp->a.read_csr(ioaddr, CSR0);
2624         }
2625
2626 #ifndef CONFIG_PCNET32_NAPI
2627         /* Set interrupt enable. */
2628         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
2629 #endif
2630
2631         if (netif_msg_intr(lp))
2632                 printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.\n",
2633                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2634
2635         spin_unlock(&lp->lock);
2636
2637         return IRQ_HANDLED;
2638 }
2639
2640 static int pcnet32_close(struct net_device *dev)
2641 {
2642         unsigned long ioaddr = dev->base_addr;
2643         struct pcnet32_private *lp = netdev_priv(dev);
2644         unsigned long flags;
2645
2646         del_timer_sync(&lp->watchdog_timer);
2647
2648         netif_stop_queue(dev);
2649
2650         spin_lock_irqsave(&lp->lock, flags);
2651
2652         lp->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2653
2654         if (netif_msg_ifdown(lp))
2655                 printk(KERN_DEBUG
2656                        "%s: Shutting down ethercard, status was %2.2x.\n",
2657                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2658
2659         /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
2660         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2661
2662         /*
2663          * Switch back to 16bit mode to avoid problems with dumb
2664          * DOS packet driver after a warm reboot
2665          */
2666         lp->a.write_bcr(ioaddr, 20, 4);
2667
2668         spin_unlock_irqrestore(&lp->lock, flags);
2669
2670         free_irq(dev->irq, dev);
2671
2672         spin_lock_irqsave(&lp->lock, flags);
2673
2674         pcnet32_purge_rx_ring(dev);
2675         pcnet32_purge_tx_ring(dev);
2676
2677         spin_unlock_irqrestore(&lp->lock, flags);
2678
2679         return 0;
2680 }
2681
2682 static struct net_device_stats *pcnet32_get_stats(struct net_device *dev)
2683 {
2684         struct pcnet32_private *lp = netdev_priv(dev);
2685         unsigned long ioaddr = dev->base_addr;
2686         unsigned long flags;
2687
2688         spin_lock_irqsave(&lp->lock, flags);
2689         lp->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2690         spin_unlock_irqrestore(&lp->lock, flags);
2691
2692         return &lp->stats;
2693 }
2694
2695 /* taken from the sunlance driver, which it took from the depca driver */
2696 static void pcnet32_load_multicast(struct net_device *dev)
2697 {
2698         struct pcnet32_private *lp = netdev_priv(dev);
2699         volatile struct pcnet32_init_block *ib = lp->init_block;
2700         volatile u16 *mcast_table = (u16 *) & ib->filter;
2701         struct dev_mc_list *dmi = dev->mc_list;
2702         unsigned long ioaddr = dev->base_addr;
2703         char *addrs;
2704         int i;
2705         u32 crc;
2706
2707         /* set all multicast bits */
2708         if (dev->flags & IFF_ALLMULTI) {
2709                 ib->filter[0] = 0xffffffff;
2710                 ib->filter[1] = 0xffffffff;
2711                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER, 0xffff);
2712                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+1, 0xffff);
2713                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+2, 0xffff);
2714                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+3, 0xffff);
2715                 return;
2716         }
2717         /* clear the multicast filter */
2718         ib->filter[0] = 0;
2719         ib->filter[1] = 0;
2720
2721         /* Add addresses */
2722         for (i = 0; i < dev->mc_count; i++) {
2723                 addrs = dmi->dmi_addr;
2724                 dmi = dmi->next;
2725
2726                 /* multicast address? */
2727                 if (!(*addrs & 1))
2728                         continue;
2729
2730                 crc = ether_crc_le(6, addrs);
2731                 crc = crc >> 26;
2732                 mcast_table[crc >> 4] =
2733                     le16_to_cpu(le16_to_cpu(mcast_table[crc >> 4]) |
2734                                 (1 << (crc & 0xf)));
2735         }
2736         for (i = 0; i < 4; i++)
2737                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER + i,
2738                                 le16_to_cpu(mcast_table[i]));
2739         return;
2740 }
2741
2742 /*
2743  * Set or clear the multicast filter for this adaptor.
2744  */
2745 static void pcnet32_set_multicast_list(struct net_device *dev)
2746 {
2747         unsigned long ioaddr = dev->base_addr, flags;
2748         struct pcnet32_private *lp = netdev_priv(dev);
2749         int csr15, suspended;
2750
2751         spin_lock_irqsave(&lp->lock, flags);
2752         suspended = pcnet32_suspend(dev, &flags, 0);
2753         csr15 = lp->a.read_csr(ioaddr, CSR15);
2754         if (dev->flags & IFF_PROMISC) {
2755                 /* Log any net taps. */
2756                 if (netif_msg_hw(lp))
2757                         printk(KERN_INFO "%s: Promiscuous mode enabled.\n",
2758                                dev->name);
2759                 lp->init_block->mode =
2760                     le16_to_cpu(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2761                                 7);
2762                 lp->a.write_csr(ioaddr, CSR15, csr15 | 0x8000);
2763         } else {
2764                 lp->init_block->mode =
2765                     le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
2766                 lp->a.write_csr(ioaddr, CSR15, csr15 & 0x7fff);
2767                 pcnet32_load_multicast(dev);
2768         }
2769
2770         if (suspended) {
2771                 int csr5;
2772                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
2773                 csr5 = lp->a.read_csr(ioaddr, CSR5);
2774                 lp->a.write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
2775         } else {
2776                 lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2777                 pcnet32_restart(dev, CSR0_NORMAL);
2778                 netif_wake_queue(dev);
2779         }
2780
2781         spin_unlock_irqrestore(&lp->lock, flags);
2782 }
2783
2784 /* This routine assumes that the lp->lock is held */
2785 static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2786 {
2787         struct pcnet32_private *lp = netdev_priv(dev);
2788         unsigned long ioaddr = dev->base_addr;
2789         u16 val_out;
2790
2791         if (!lp->mii)
2792                 return 0;
2793
2794         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2795         val_out = lp->a.read_bcr(ioaddr, 34);
2796
2797         return val_out;
2798 }
2799
2800 /* This routine assumes that the lp->lock is held */
2801 static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2802 {
2803         struct pcnet32_private *lp = netdev_priv(dev);
2804         unsigned long ioaddr = dev->base_addr;
2805
2806         if (!lp->mii)
2807                 return;
2808
2809         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2810         lp->a.write_bcr(ioaddr, 34, val);
2811 }
2812
2813 static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2814 {
2815         struct pcnet32_private *lp = netdev_priv(dev);
2816         int rc;
2817         unsigned long flags;
2818
2819         /* SIOC[GS]MIIxxx ioctls */
2820         if (lp->mii) {
2821                 spin_lock_irqsave(&lp->lock, flags);
2822                 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2823                 spin_unlock_irqrestore(&lp->lock, flags);
2824         } else {
2825                 rc = -EOPNOTSUPP;
2826         }
2827
2828         return rc;
2829 }
2830
2831 static int pcnet32_check_otherphy(struct net_device *dev)
2832 {
2833         struct pcnet32_private *lp = netdev_priv(dev);
2834         struct mii_if_info mii = lp->mii_if;
2835         u16 bmcr;
2836         int i;
2837
2838         for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2839                 if (i == lp->mii_if.phy_id)
2840                         continue;       /* skip active phy */
2841                 if (lp->phymask & (1 << i)) {
2842                         mii.phy_id = i;
2843                         if (mii_link_ok(&mii)) {
2844                                 /* found PHY with active link */
2845                                 if (netif_msg_link(lp))
2846                                         printk(KERN_INFO
2847                                                "%s: Using PHY number %d.\n",
2848                                                dev->name, i);
2849
2850                                 /* isolate inactive phy */
2851                                 bmcr =
2852                                     mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2853                                 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2854                                            bmcr | BMCR_ISOLATE);
2855
2856                                 /* de-isolate new phy */
2857                                 bmcr = mdio_read(dev, i, MII_BMCR);
2858                                 mdio_write(dev, i, MII_BMCR,
2859                                            bmcr & ~BMCR_ISOLATE);
2860
2861                                 /* set new phy address */
2862                                 lp->mii_if.phy_id = i;
2863                                 return 1;
2864                         }
2865                 }
2866         }
2867         return 0;
2868 }
2869
2870 /*
2871  * Show the status of the media.  Similar to mii_check_media however it
2872  * correctly shows the link speed for all (tested) pcnet32 variants.
2873  * Devices with no mii just report link state without speed.
2874  *
2875  * Caller is assumed to hold and release the lp->lock.
2876  */
2877
2878 static void pcnet32_check_media(struct net_device *dev, int verbose)
2879 {
2880         struct pcnet32_private *lp = netdev_priv(dev);
2881         int curr_link;
2882         int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2883         u32 bcr9;
2884
2885         if (lp->mii) {
2886                 curr_link = mii_link_ok(&lp->mii_if);
2887         } else {
2888                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
2889                 curr_link = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
2890         }
2891         if (!curr_link) {
2892                 if (prev_link || verbose) {
2893                         netif_carrier_off(dev);
2894                         if (netif_msg_link(lp))
2895                                 printk(KERN_INFO "%s: link down\n", dev->name);
2896                 }
2897                 if (lp->phycount > 1) {
2898                         curr_link = pcnet32_check_otherphy(dev);
2899                         prev_link = 0;
2900                 }
2901         } else if (verbose || !prev_link) {
2902                 netif_carrier_on(dev);
2903                 if (lp->mii) {
2904                         if (netif_msg_link(lp)) {
2905                                 struct ethtool_cmd ecmd;
2906                                 mii_ethtool_gset(&lp->mii_if, &ecmd);
2907                                 printk(KERN_INFO
2908                                        "%s: link up, %sMbps, %s-duplex\n",
2909                                        dev->name,
2910                                        (ecmd.speed == SPEED_100) ? "100" : "10",
2911                                        (ecmd.duplex ==
2912                                         DUPLEX_FULL) ? "full" : "half");
2913                         }
2914                         bcr9 = lp->a.read_bcr(dev->base_addr, 9);
2915                         if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2916                                 if (lp->mii_if.full_duplex)
2917                                         bcr9 |= (1 << 0);
2918                                 else
2919                                         bcr9 &= ~(1 << 0);
2920                                 lp->a.write_bcr(dev->base_addr, 9, bcr9);
2921                         }
2922                 } else {
2923                         if (netif_msg_link(lp))
2924                                 printk(KERN_INFO "%s: link up\n", dev->name);
2925                 }
2926         }
2927 }
2928
2929 /*
2930  * Check for loss of link and link establishment.
2931  * Can not use mii_check_media because it does nothing if mode is forced.
2932  */
2933
2934 static void pcnet32_watchdog(struct net_device *dev)
2935 {
2936         struct pcnet32_private *lp = netdev_priv(dev);
2937         unsigned long flags;
2938
2939         /* Print the link status if it has changed */
2940         spin_lock_irqsave(&lp->lock, flags);
2941         pcnet32_check_media(dev, 0);
2942         spin_unlock_irqrestore(&lp->lock, flags);
2943
2944         mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2945 }
2946
2947 static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
2948 {
2949         struct net_device *dev = pci_get_drvdata(pdev);
2950
2951         if (dev) {
2952                 struct pcnet32_private *lp = netdev_priv(dev);
2953
2954                 unregister_netdev(dev);
2955                 pcnet32_free_ring(dev);
2956                 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
2957                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2958                                     lp->init_block, lp->init_dma_addr);
2959                 free_netdev(dev);
2960                 pci_disable_device(pdev);
2961                 pci_set_drvdata(pdev, NULL);
2962         }
2963 }
2964
2965 static struct pci_driver pcnet32_driver = {
2966         .name = DRV_NAME,
2967         .probe = pcnet32_probe_pci,
2968         .remove = __devexit_p(pcnet32_remove_one),
2969         .id_table = pcnet32_pci_tbl,
2970 };
2971
2972 /* An additional parameter that may be passed in... */
2973 static int debug = -1;
2974 static int tx_start_pt = -1;
2975 static int pcnet32_have_pci;
2976
2977 module_param(debug, int, 0);
2978 MODULE_PARM_DESC(debug, DRV_NAME " debug level");
2979 module_param(max_interrupt_work, int, 0);
2980 MODULE_PARM_DESC(max_interrupt_work,
2981                  DRV_NAME " maximum events handled per interrupt");
2982 module_param(rx_copybreak, int, 0);
2983 MODULE_PARM_DESC(rx_copybreak,
2984                  DRV_NAME " copy breakpoint for copy-only-tiny-frames");
2985 module_param(tx_start_pt, int, 0);
2986 MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
2987 module_param(pcnet32vlb, int, 0);
2988 MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
2989 module_param_array(options, int, NULL, 0);
2990 MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
2991 module_param_array(full_duplex, int, NULL, 0);
2992 MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
2993 /* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
2994 module_param_array(homepna, int, NULL, 0);
2995 MODULE_PARM_DESC(homepna,
2996                  DRV_NAME
2997                  " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
2998
2999 MODULE_AUTHOR("Thomas Bogendoerfer");
3000 MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
3001 MODULE_LICENSE("GPL");
3002
3003 #define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
3004
3005 static int __init pcnet32_init_module(void)
3006 {
3007         printk(KERN_INFO "%s", version);
3008
3009         pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
3010
3011         if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
3012                 tx_start = tx_start_pt;
3013
3014         /* find the PCI devices */
3015         if (!pci_register_driver(&pcnet32_driver))
3016                 pcnet32_have_pci = 1;
3017
3018         /* should we find any remaining VLbus devices ? */
3019         if (pcnet32vlb)
3020                 pcnet32_probe_vlbus(pcnet32_portlist);
3021
3022         if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
3023                 printk(KERN_INFO PFX "%d cards_found.\n", cards_found);
3024
3025         return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
3026 }
3027
3028 static void __exit pcnet32_cleanup_module(void)
3029 {
3030         struct net_device *next_dev;
3031
3032         while (pcnet32_dev) {
3033                 struct pcnet32_private *lp = netdev_priv(pcnet32_dev);
3034                 next_dev = lp->next;
3035                 unregister_netdev(pcnet32_dev);
3036                 pcnet32_free_ring(pcnet32_dev);
3037                 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
3038                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
3039                                     lp->init_block, lp->init_dma_addr);
3040                 free_netdev(pcnet32_dev);
3041                 pcnet32_dev = next_dev;
3042         }
3043
3044         if (pcnet32_have_pci)
3045                 pci_unregister_driver(&pcnet32_driver);
3046 }
3047
3048 module_init(pcnet32_init_module);
3049 module_exit(pcnet32_cleanup_module);
3050
3051 /*
3052  * Local variables:
3053  *  c-indent-level: 4
3054  *  tab-width: 8
3055  * End:
3056  */