drivers/net/ethernet/3com/typhoon.c

   1 /* typhoon.c: A Linux Ethernet device driver for 3Com 3CR990 family of NICs */
   2 /*
   3         Written 2002-2004 by David Dillow <dave@thedillows.org>
   4         Based on code written 1998-2000 by Donald Becker <becker@scyld.com> and
   5         Linux 2.2.x driver by David P. McLean <davidpmclean@yahoo.com>.
   6
   7         This software may be used and distributed according to the terms of
   8         the GNU General Public License (GPL), incorporated herein by reference.
   9         Drivers based on or derived from this code fall under the GPL and must
  10         retain the authorship, copyright and license notice.  This file is not
  11         a complete program and may only be used when the entire operating
  12         system is licensed under the GPL.
  13
  14         This software is available on a public web site. It may enable
  15         cryptographic capabilities of the 3Com hardware, and may be
  16         exported from the United States under License Exception "TSU"
  17         pursuant to 15 C.F.R. Section 740.13(e).
  18
  19         This work was funded by the National Library of Medicine under
  20         the Department of Energy project number 0274DD06D1 and NLM project
  21         number Y1-LM-2015-01.
  22
  23         This driver is designed for the 3Com 3CR990 Family of cards with the
  24         3XP Processor. It has been tested on x86 and sparc64.
  25
  26         KNOWN ISSUES:
  27         *) Cannot DMA Rx packets to a 2 byte aligned address. Also firmware
  28                 issue. Hopefully 3Com will fix it.
  29         *) Waiting for a command response takes 8ms due to non-preemptable
  30                 polling. Only significant for getting stats and creating
  31                 SAs, but an ugly wart never the less.
  32
  33         TODO:
  34         *) Doesn't do IPSEC offloading. Yet. Keep yer pants on, it's coming.
  35         *) Add more support for ethtool (especially for NIC stats)
  36         *) Allow disabling of RX checksum offloading
  37         *) Fix MAC changing to work while the interface is up
  38                 (Need to put commands on the TX ring, which changes
  39                 the locking)
  40         *) Add in FCS to {rx,tx}_bytes, since the hardware doesn't. See
  41                 http://oss.sgi.com/cgi-bin/mesg.cgi?a=netdev&i=20031215152211.7003fe8e.rddunlap%40osdl.org
  42 */
  43
  44 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
  45  * Setting to > 1518 effectively disables this feature.
  46  */
  47 static int rx_copybreak = 200;
  48
  49 /* Should we use MMIO or Port IO?
  50  * 0: Port IO
  51  * 1: MMIO
  52  * 2: Try MMIO, fallback to Port IO
  53  */
  54 static unsigned int use_mmio = 2;
  55
  56 /* end user-configurable values */
  57
  58 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
  59  */
  60 static const int multicast_filter_limit = 32;
  61
  62 /* Operational parameters that are set at compile time. */
  63
  64 /* Keep the ring sizes a power of two for compile efficiency.
  65  * The compiler will convert <unsigned>'%'<2^N> into a bit mask.
  66  * Making the Tx ring too large decreases the effectiveness of channel
  67  * bonding and packet priority.
  68  * There are no ill effects from too-large receive rings.
  69  *
  70  * We don't currently use the Hi Tx ring so, don't make it very big.
  71  *
  72  * Beware that if we start using the Hi Tx ring, we will need to change
  73  * typhoon_num_free_tx() and typhoon_tx_complete() to account for that.
  74  */
  75 #define TXHI_ENTRIES            2
  76 #define TXLO_ENTRIES            128
  77 #define RX_ENTRIES              32
  78 #define COMMAND_ENTRIES         16
  79 #define RESPONSE_ENTRIES        32
  80
  81 #define COMMAND_RING_SIZE       (COMMAND_ENTRIES * sizeof(struct cmd_desc))
  82 #define RESPONSE_RING_SIZE      (RESPONSE_ENTRIES * sizeof(struct resp_desc))
  83
  84 /* The 3XP will preload and remove 64 entries from the free buffer
  85  * list, and we need one entry to keep the ring from wrapping, so
  86  * to keep this a power of two, we use 128 entries.
  87  */
  88 #define RXFREE_ENTRIES          128
  89 #define RXENT_ENTRIES           (RXFREE_ENTRIES - 1)
  90
  91 /* Operational parameters that usually are not changed. */
  92
  93 /* Time in jiffies before concluding the transmitter is hung. */
  94 #define TX_TIMEOUT  (2*HZ)
  95
  96 #define PKT_BUF_SZ              1536
  97 #define FIRMWARE_NAME           "3com/typhoon.bin"
  98
  99 #define pr_fmt(fmt)             KBUILD_MODNAME " " fmt
 100
 101 #include <linux/module.h>
 102 #include <linux/kernel.h>
 103 #include <linux/sched.h>
 104 #include <linux/string.h>
 105 #include <linux/timer.h>
 106 #include <linux/errno.h>
 107 #include <linux/ioport.h>
 108 #include <linux/interrupt.h>
 109 #include <linux/pci.h>
 110 #include <linux/netdevice.h>
 111 #include <linux/etherdevice.h>
 112 #include <linux/skbuff.h>
 113 #include <linux/mm.h>
 114 #include <linux/init.h>
 115 #include <linux/delay.h>
 116 #include <linux/ethtool.h>
 117 #include <linux/if_vlan.h>
 118 #include <linux/crc32.h>
 119 #include <linux/bitops.h>
 120 #include <asm/processor.h>
 121 #include <asm/io.h>
 122 #include <asm/uaccess.h>
 123 #include <linux/in6.h>
 124 #include <linux/dma-mapping.h>
 125 #include <linux/firmware.h>
 126
 127 #include "typhoon.h"
 128
 129 MODULE_AUTHOR("David Dillow <dave@thedillows.org>");
 130 MODULE_VERSION("1.0");
 131 MODULE_LICENSE("GPL");
 132 MODULE_FIRMWARE(FIRMWARE_NAME);
 133 MODULE_DESCRIPTION("3Com Typhoon Family (3C990, 3CR990, and variants)");
 134 MODULE_PARM_DESC(rx_copybreak, "Packets smaller than this are copied and "
 135                                "the buffer given back to the NIC. Default "
 136                                "is 200.");
 137 MODULE_PARM_DESC(use_mmio, "Use MMIO (1) or PIO(0) to access the NIC. "
 138                            "Default is to try MMIO and fallback to PIO.");
 139 module_param(rx_copybreak, int, 0);
 140 module_param(use_mmio, int, 0);
 141
 142 #if defined(NETIF_F_TSO) && MAX_SKB_FRAGS > 32
 143 #warning Typhoon only supports 32 entries in its SG list for TSO, disabling TSO
 144 #undef NETIF_F_TSO
 145 #endif
 146
 147 #if TXLO_ENTRIES <= (2 * MAX_SKB_FRAGS)
 148 #error TX ring too small!
 149 #endif
 150
 151 struct typhoon_card_info {
 152         const char *name;
 153         const int capabilities;
 154 };
 155
 156 #define TYPHOON_CRYPTO_NONE             0x00
 157 #define TYPHOON_CRYPTO_DES              0x01
 158 #define TYPHOON_CRYPTO_3DES             0x02
 159 #define TYPHOON_CRYPTO_VARIABLE         0x04
 160 #define TYPHOON_FIBER                   0x08
 161 #define TYPHOON_WAKEUP_NEEDS_RESET      0x10
 162
 163 enum typhoon_cards {
 164         TYPHOON_TX = 0, TYPHOON_TX95, TYPHOON_TX97, TYPHOON_SVR,
 165         TYPHOON_SVR95, TYPHOON_SVR97, TYPHOON_TXM, TYPHOON_BSVR,
 166         TYPHOON_FX95, TYPHOON_FX97, TYPHOON_FX95SVR, TYPHOON_FX97SVR,
 167         TYPHOON_FXM,
 168 };
 169
 170 /* directly indexed by enum typhoon_cards, above */
 171 static struct typhoon_card_info typhoon_card_info[] __devinitdata = {
 172         { "3Com Typhoon (3C990-TX)",
 173                 TYPHOON_CRYPTO_NONE},
 174         { "3Com Typhoon (3CR990-TX-95)",
 175                 TYPHOON_CRYPTO_DES},
 176         { "3Com Typhoon (3CR990-TX-97)",
 177                 TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES},
 178         { "3Com Typhoon (3C990SVR)",
 179                 TYPHOON_CRYPTO_NONE},
 180         { "3Com Typhoon (3CR990SVR95)",
 181                 TYPHOON_CRYPTO_DES},
 182         { "3Com Typhoon (3CR990SVR97)",
 183                 TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES},
 184         { "3Com Typhoon2 (3C990B-TX-M)",
 185                 TYPHOON_CRYPTO_VARIABLE},
 186         { "3Com Typhoon2 (3C990BSVR)",
 187                 TYPHOON_CRYPTO_VARIABLE},
 188         { "3Com Typhoon (3CR990-FX-95)",
 189                 TYPHOON_CRYPTO_DES | TYPHOON_FIBER},
 190         { "3Com Typhoon (3CR990-FX-97)",
 191                 TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES | TYPHOON_FIBER},
 192         { "3Com Typhoon (3CR990-FX-95 Server)",
 193                 TYPHOON_CRYPTO_DES | TYPHOON_FIBER},
 194         { "3Com Typhoon (3CR990-FX-97 Server)",
 195                 TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES | TYPHOON_FIBER},
 196         { "3Com Typhoon2 (3C990B-FX-97)",
 197                 TYPHOON_CRYPTO_VARIABLE | TYPHOON_FIBER},
 198 };
 199
 200 /* Notes on the new subsystem numbering scheme:
 201  * bits 0-1 indicate crypto capabilities: (0) variable, (1) DES, or (2) 3DES
 202  * bit 4 indicates if this card has secured firmware (we don't support it)
 203  * bit 8 indicates if this is a (0) copper or (1) fiber card
 204  * bits 12-16 indicate card type: (0) client and (1) server
 205  */
 206 static DEFINE_PCI_DEVICE_TABLE(typhoon_pci_tbl) = {
 207         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990,
 208           PCI_ANY_ID, PCI_ANY_ID, 0, 0,TYPHOON_TX },
 209         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_TX_95,
 210           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_TX95 },
 211         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_TX_97,
 212           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_TX97 },
 213         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B,
 214           PCI_ANY_ID, 0x1000, 0, 0, TYPHOON_TXM },
 215         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B,
 216           PCI_ANY_ID, 0x1102, 0, 0, TYPHOON_FXM },
 217         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B,
 218           PCI_ANY_ID, 0x2000, 0, 0, TYPHOON_BSVR },
 219         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
 220           PCI_ANY_ID, 0x1101, 0, 0, TYPHOON_FX95 },
 221         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
 222           PCI_ANY_ID, 0x1102, 0, 0, TYPHOON_FX97 },
 223         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
 224           PCI_ANY_ID, 0x2101, 0, 0, TYPHOON_FX95SVR },
 225         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
 226           PCI_ANY_ID, 0x2102, 0, 0, TYPHOON_FX97SVR },
 227         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR95,
 228           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_SVR95 },
 229         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR97,
 230           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_SVR97 },
 231         { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR,
 232           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_SVR },
 233         { 0, }
 234 };
 235 MODULE_DEVICE_TABLE(pci, typhoon_pci_tbl);
 236
 237 /* Define the shared memory area
 238  * Align everything the 3XP will normally be using.
 239  * We'll need to move/align txHi if we start using that ring.
 240  */
 241 #define __3xp_aligned   ____cacheline_aligned
 242 struct typhoon_shared {
 243         struct typhoon_interface        iface;
 244         struct typhoon_indexes          indexes                 __3xp_aligned;
 245         struct tx_desc                  txLo[TXLO_ENTRIES]      __3xp_aligned;
 246         struct rx_desc                  rxLo[RX_ENTRIES]        __3xp_aligned;
 247         struct rx_desc                  rxHi[RX_ENTRIES]        __3xp_aligned;
 248         struct cmd_desc                 cmd[COMMAND_ENTRIES]    __3xp_aligned;
 249         struct resp_desc                resp[RESPONSE_ENTRIES]  __3xp_aligned;
 250         struct rx_free                  rxBuff[RXFREE_ENTRIES]  __3xp_aligned;
 251         u32                             zeroWord;
 252         struct tx_desc                  txHi[TXHI_ENTRIES];
 253 } __packed;
 254
 255 struct rxbuff_ent {
 256         struct sk_buff *skb;
 257         dma_addr_t      dma_addr;
 258 };
 259
 260 struct typhoon {
 261         /* Tx cache line section */
 262         struct transmit_ring    txLoRing        ____cacheline_aligned;
 263         struct pci_dev *        tx_pdev;
 264         void __iomem            *tx_ioaddr;
 265         u32                     txlo_dma_addr;
 266
 267         /* Irq/Rx cache line section */
 268         void __iomem            *ioaddr         ____cacheline_aligned;
 269         struct typhoon_indexes *indexes;
 270         u8                      awaiting_resp;
 271         u8                      duplex;
 272         u8                      speed;
 273         u8                      card_state;
 274         struct basic_ring       rxLoRing;
 275         struct pci_dev *        pdev;
 276         struct net_device *     dev;
 277         struct napi_struct      napi;
 278         struct basic_ring       rxHiRing;
 279         struct basic_ring       rxBuffRing;
 280         struct rxbuff_ent       rxbuffers[RXENT_ENTRIES];
 281
 282         /* general section */
 283         spinlock_t              command_lock    ____cacheline_aligned;
 284         struct basic_ring       cmdRing;
 285         struct basic_ring       respRing;
 286         struct net_device_stats stats;
 287         struct net_device_stats stats_saved;
 288         struct typhoon_shared * shared;
 289         dma_addr_t              shared_dma;
 290         __le16                  xcvr_select;
 291         __le16                  wol_events;
 292         __le32                  offload;
 293
 294         /* unused stuff (future use) */
 295         int                     capabilities;
 296         struct transmit_ring    txHiRing;
 297 };
 298
 299 enum completion_wait_values {
 300         NoWait = 0, WaitNoSleep, WaitSleep,
 301 };
 302
 303 /* These are the values for the typhoon.card_state variable.
 304  * These determine where the statistics will come from in get_stats().
 305  * The sleep image does not support the statistics we need.
 306  */
 307 enum state_values {
 308         Sleeping = 0, Running,
 309 };
 310
 311 /* PCI writes are not guaranteed to be posted in order, but outstanding writes
 312  * cannot pass a read, so this forces current writes to post.
 313  */
 314 #define typhoon_post_pci_writes(x) \
 315         do { if(likely(use_mmio)) ioread32(x+TYPHOON_REG_HEARTBEAT); } while(0)
 316
 317 /* We'll wait up to six seconds for a reset, and half a second normally.
 318  */
 319 #define TYPHOON_UDELAY                  50
 320 #define TYPHOON_RESET_TIMEOUT_SLEEP     (6 * HZ)
 321 #define TYPHOON_RESET_TIMEOUT_NOSLEEP   ((6 * 1000000) / TYPHOON_UDELAY)
 322 #define TYPHOON_WAIT_TIMEOUT            ((1000000 / 2) / TYPHOON_UDELAY)
 323
 324 #if defined(NETIF_F_TSO)
 325 #define skb_tso_size(x)         (skb_shinfo(x)->gso_size)
 326 #define TSO_NUM_DESCRIPTORS     2
 327 #define TSO_OFFLOAD_ON          TYPHOON_OFFLOAD_TCP_SEGMENT
 328 #else
 329 #define NETIF_F_TSO             0
 330 #define skb_tso_size(x)         0
 331 #define TSO_NUM_DESCRIPTORS     0
 332 #define TSO_OFFLOAD_ON          0
 333 #endif
 334
 335 static inline void
 336 typhoon_inc_index(u32 *index, const int count, const int num_entries)
 337 {
 338         /* Increment a ring index -- we can use this for all rings execept
 339          * the Rx rings, as they use different size descriptors
 340          * otherwise, everything is the same size as a cmd_desc
 341          */
 342         *index += count * sizeof(struct cmd_desc);
 343         *index %= num_entries * sizeof(struct cmd_desc);
 344 }
 345
 346 static inline void
 347 typhoon_inc_cmd_index(u32 *index, const int count)
 348 {
 349         typhoon_inc_index(index, count, COMMAND_ENTRIES);
 350 }
 351
 352 static inline void
 353 typhoon_inc_resp_index(u32 *index, const int count)
 354 {
 355         typhoon_inc_index(index, count, RESPONSE_ENTRIES);
 356 }
 357
 358 static inline void
 359 typhoon_inc_rxfree_index(u32 *index, const int count)
 360 {
 361         typhoon_inc_index(index, count, RXFREE_ENTRIES);
 362 }
 363
 364 static inline void
 365 typhoon_inc_tx_index(u32 *index, const int count)
 366 {
 367         /* if we start using the Hi Tx ring, this needs updateing */
 368         typhoon_inc_index(index, count, TXLO_ENTRIES);
 369 }
 370
 371 static inline void
 372 typhoon_inc_rx_index(u32 *index, const int count)
 373 {
 374         /* sizeof(struct rx_desc) != sizeof(struct cmd_desc) */
 375         *index += count * sizeof(struct rx_desc);
 376         *index %= RX_ENTRIES * sizeof(struct rx_desc);
 377 }
 378
 379 static int
 380 typhoon_reset(void __iomem *ioaddr, int wait_type)
 381 {
 382         int i, err = 0;
 383         int timeout;
 384
 385         if(wait_type == WaitNoSleep)
 386                 timeout = TYPHOON_RESET_TIMEOUT_NOSLEEP;
 387         else
 388                 timeout = TYPHOON_RESET_TIMEOUT_SLEEP;
 389
 390         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
 391         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
 392
 393         iowrite32(TYPHOON_RESET_ALL, ioaddr + TYPHOON_REG_SOFT_RESET);
 394         typhoon_post_pci_writes(ioaddr);
 395         udelay(1);
 396         iowrite32(TYPHOON_RESET_NONE, ioaddr + TYPHOON_REG_SOFT_RESET);
 397
 398         if(wait_type != NoWait) {
 399                 for(i = 0; i < timeout; i++) {
 400                         if(ioread32(ioaddr + TYPHOON_REG_STATUS) ==
 401                            TYPHOON_STATUS_WAITING_FOR_HOST)
 402                                 goto out;
 403
 404                         if(wait_type == WaitSleep)
 405                                 schedule_timeout_uninterruptible(1);
 406                         else
 407                                 udelay(TYPHOON_UDELAY);
 408                 }
 409
 410                 err = -ETIMEDOUT;
 411         }
 412
 413 out:
 414         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
 415         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
 416
 417         /* The 3XP seems to need a little extra time to complete the load
 418          * of the sleep image before we can reliably boot it. Failure to
 419          * do this occasionally results in a hung adapter after boot in
 420          * typhoon_init_one() while trying to read the MAC address or
 421          * putting the card to sleep. 3Com's driver waits 5ms, but
 422          * that seems to be overkill. However, if we can sleep, we might
 423          * as well give it that much time. Otherwise, we'll give it 500us,
 424          * which should be enough (I've see it work well at 100us, but still
 425          * saw occasional problems.)
 426          */
 427         if(wait_type == WaitSleep)
 428                 msleep(5);
 429         else
 430                 udelay(500);
 431         return err;
 432 }
 433
 434 static int
 435 typhoon_wait_status(void __iomem *ioaddr, u32 wait_value)
 436 {
 437         int i, err = 0;
 438
 439         for(i = 0; i < TYPHOON_WAIT_TIMEOUT; i++) {
 440                 if(ioread32(ioaddr + TYPHOON_REG_STATUS) == wait_value)
 441                         goto out;
 442                 udelay(TYPHOON_UDELAY);
 443         }
 444
 445         err = -ETIMEDOUT;
 446
 447 out:
 448         return err;
 449 }
 450
 451 static inline void
 452 typhoon_media_status(struct net_device *dev, struct resp_desc *resp)
 453 {
 454         if(resp->parm1 & TYPHOON_MEDIA_STAT_NO_LINK)
 455                 netif_carrier_off(dev);
 456         else
 457                 netif_carrier_on(dev);
 458 }
 459
 460 static inline void
 461 typhoon_hello(struct typhoon *tp)
 462 {
 463         struct basic_ring *ring = &tp->cmdRing;
 464         struct cmd_desc *cmd;
 465
 466         /* We only get a hello request if we've not sent anything to the
 467          * card in a long while. If the lock is held, then we're in the
 468          * process of issuing a command, so we don't need to respond.
 469          */
 470         if(spin_trylock(&tp->command_lock)) {
 471                 cmd = (struct cmd_desc *)(ring->ringBase + ring->lastWrite);
 472                 typhoon_inc_cmd_index(&ring->lastWrite, 1);
 473
 474                 INIT_COMMAND_NO_RESPONSE(cmd, TYPHOON_CMD_HELLO_RESP);
 475                 wmb();
 476                 iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY);
 477                 spin_unlock(&tp->command_lock);
 478         }
 479 }
 480
 481 static int
 482 typhoon_process_response(struct typhoon *tp, int resp_size,
 483                                 struct resp_desc *resp_save)
 484 {
 485         struct typhoon_indexes *indexes = tp->indexes;
 486         struct resp_desc *resp;
 487         u8 *base = tp->respRing.ringBase;
 488         int count, len, wrap_len;
 489         u32 cleared;
 490         u32 ready;
 491
 492         cleared = le32_to_cpu(indexes->respCleared);
 493         ready = le32_to_cpu(indexes->respReady);
 494         while(cleared != ready) {
 495                 resp = (struct resp_desc *)(base + cleared);
 496                 count = resp->numDesc + 1;
 497                 if(resp_save && resp->seqNo) {
 498                         if(count > resp_size) {
 499                                 resp_save->flags = TYPHOON_RESP_ERROR;
 500                                 goto cleanup;
 501                         }
 502
 503                         wrap_len = 0;
 504                         len = count * sizeof(*resp);
 505                         if(unlikely(cleared + len > RESPONSE_RING_SIZE)) {
 506                                 wrap_len = cleared + len - RESPONSE_RING_SIZE;
 507                                 len = RESPONSE_RING_SIZE - cleared;
 508                         }
 509
 510                         memcpy(resp_save, resp, len);
 511                         if(unlikely(wrap_len)) {
 512                                 resp_save += len / sizeof(*resp);
 513                                 memcpy(resp_save, base, wrap_len);
 514                         }
 515
 516                         resp_save = NULL;
 517                 } else if(resp->cmd == TYPHOON_CMD_READ_MEDIA_STATUS) {
 518                         typhoon_media_status(tp->dev, resp);
 519                 } else if(resp->cmd == TYPHOON_CMD_HELLO_RESP) {
 520                         typhoon_hello(tp);
 521                 } else {
 522                         netdev_err(tp->dev,
 523                                    "dumping unexpected response 0x%04x:%d:0x%02x:0x%04x:%08x:%08x\n",
 524                                    le16_to_cpu(resp->cmd),
 525                                    resp->numDesc, resp->flags,
 526                                    le16_to_cpu(resp->parm1),
 527                                    le32_to_cpu(resp->parm2),
 528                                    le32_to_cpu(resp->parm3));
 529                 }
 530
 531 cleanup:
 532                 typhoon_inc_resp_index(&cleared, count);
 533         }
 534
 535         indexes->respCleared = cpu_to_le32(cleared);
 536         wmb();
 537         return resp_save == NULL;
 538 }
 539
 540 static inline int
 541 typhoon_num_free(int lastWrite, int lastRead, int ringSize)
 542 {
 543         /* this works for all descriptors but rx_desc, as they are a
 544          * different size than the cmd_desc -- everyone else is the same
 545          */
 546         lastWrite /= sizeof(struct cmd_desc);
 547         lastRead /= sizeof(struct cmd_desc);
 548         return (ringSize + lastRead - lastWrite - 1) % ringSize;
 549 }
 550
 551 static inline int
 552 typhoon_num_free_cmd(struct typhoon *tp)
 553 {
 554         int lastWrite = tp->cmdRing.lastWrite;
 555         int cmdCleared = le32_to_cpu(tp->indexes->cmdCleared);
 556
 557         return typhoon_num_free(lastWrite, cmdCleared, COMMAND_ENTRIES);
 558 }
 559
 560 static inline int
 561 typhoon_num_free_resp(struct typhoon *tp)
 562 {
 563         int respReady = le32_to_cpu(tp->indexes->respReady);
 564         int respCleared = le32_to_cpu(tp->indexes->respCleared);
 565
 566         return typhoon_num_free(respReady, respCleared, RESPONSE_ENTRIES);
 567 }
 568
 569 static inline int
 570 typhoon_num_free_tx(struct transmit_ring *ring)
 571 {
 572         /* if we start using the Hi Tx ring, this needs updating */
 573         return typhoon_num_free(ring->lastWrite, ring->lastRead, TXLO_ENTRIES);
 574 }
 575
 576 static int
 577 typhoon_issue_command(struct typhoon *tp, int num_cmd, struct cmd_desc *cmd,
 578                       int num_resp, struct resp_desc *resp)
 579 {
 580         struct typhoon_indexes *indexes = tp->indexes;
 581         struct basic_ring *ring = &tp->cmdRing;
 582         struct resp_desc local_resp;
 583         int i, err = 0;
 584         int got_resp;
 585         int freeCmd, freeResp;
 586         int len, wrap_len;
 587
 588         spin_lock(&tp->command_lock);
 589
 590         freeCmd = typhoon_num_free_cmd(tp);
 591         freeResp = typhoon_num_free_resp(tp);
 592
 593         if(freeCmd < num_cmd || freeResp < num_resp) {
 594                 netdev_err(tp->dev, "no descs for cmd, had (needed) %d (%d) cmd, %d (%d) resp\n",
 595                            freeCmd, num_cmd, freeResp, num_resp);
 596                 err = -ENOMEM;
 597                 goto out;
 598         }
 599
 600         if(cmd->flags & TYPHOON_CMD_RESPOND) {
 601                 /* If we're expecting a response, but the caller hasn't given
 602                  * us a place to put it, we'll provide one.
 603                  */
 604                 tp->awaiting_resp = 1;
 605                 if(resp == NULL) {
 606                         resp = &local_resp;
 607                         num_resp = 1;
 608                 }
 609         }
 610
 611         wrap_len = 0;
 612         len = num_cmd * sizeof(*cmd);
 613         if(unlikely(ring->lastWrite + len > COMMAND_RING_SIZE)) {
 614                 wrap_len = ring->lastWrite + len - COMMAND_RING_SIZE;
 615                 len = COMMAND_RING_SIZE - ring->lastWrite;
 616         }
 617
 618         memcpy(ring->ringBase + ring->lastWrite, cmd, len);
 619         if(unlikely(wrap_len)) {
 620                 struct cmd_desc *wrap_ptr = cmd;
 621                 wrap_ptr += len / sizeof(*cmd);
 622                 memcpy(ring->ringBase, wrap_ptr, wrap_len);
 623         }
 624
 625         typhoon_inc_cmd_index(&ring->lastWrite, num_cmd);
 626
 627         /* "I feel a presence... another warrior is on the mesa."
 628          */
 629         wmb();
 630         iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY);
 631         typhoon_post_pci_writes(tp->ioaddr);
 632
 633         if((cmd->flags & TYPHOON_CMD_RESPOND) == 0)
 634                 goto out;
 635
 636         /* Ugh. We'll be here about 8ms, spinning our thumbs, unable to
 637          * preempt or do anything other than take interrupts. So, don't
 638          * wait for a response unless you have to.
 639          *
 640          * I've thought about trying to sleep here, but we're called
 641          * from many contexts that don't allow that. Also, given the way
 642          * 3Com has implemented irq coalescing, we would likely timeout --
 643          * this has been observed in real life!
 644          *
 645          * The big killer is we have to wait to get stats from the card,
 646          * though we could go to a periodic refresh of those if we don't
 647          * mind them getting somewhat stale. The rest of the waiting
 648          * commands occur during open/close/suspend/resume, so they aren't
 649          * time critical. Creating SAs in the future will also have to
 650          * wait here.
 651          */
 652         got_resp = 0;
 653         for(i = 0; i < TYPHOON_WAIT_TIMEOUT && !got_resp; i++) {
 654                 if(indexes->respCleared != indexes->respReady)
 655                         got_resp = typhoon_process_response(tp, num_resp,
 656                                                                 resp);
 657                 udelay(TYPHOON_UDELAY);
 658         }
 659
 660         if(!got_resp) {
 661                 err = -ETIMEDOUT;
 662                 goto out;
 663         }
 664
 665         /* Collect the error response even if we don't care about the
 666          * rest of the response
 667          */
 668         if(resp->flags & TYPHOON_RESP_ERROR)
 669                 err = -EIO;
 670
 671 out:
 672         if(tp->awaiting_resp) {
 673                 tp->awaiting_resp = 0;
 674                 smp_wmb();
 675
 676                 /* Ugh. If a response was added to the ring between
 677                  * the call to typhoon_process_response() and the clearing
 678                  * of tp->awaiting_resp, we could have missed the interrupt
 679                  * and it could hang in the ring an indeterminate amount of
 680                  * time. So, check for it, and interrupt ourselves if this
 681                  * is the case.
 682                  */
 683                 if(indexes->respCleared != indexes->respReady)
 684                         iowrite32(1, tp->ioaddr + TYPHOON_REG_SELF_INTERRUPT);
 685         }
 686
 687         spin_unlock(&tp->command_lock);
 688         return err;
 689 }
 690
 691 static inline void
 692 typhoon_tso_fill(struct sk_buff *skb, struct transmit_ring *txRing,
 693                         u32 ring_dma)
 694 {
 695         struct tcpopt_desc *tcpd;
 696         u32 tcpd_offset = ring_dma;
 697
 698         tcpd = (struct tcpopt_desc *) (txRing->ringBase + txRing->lastWrite);
 699         tcpd_offset += txRing->lastWrite;
 700         tcpd_offset += offsetof(struct tcpopt_desc, bytesTx);
 701         typhoon_inc_tx_index(&txRing->lastWrite, 1);
 702
 703         tcpd->flags = TYPHOON_OPT_DESC | TYPHOON_OPT_TCP_SEG;
 704         tcpd->numDesc = 1;
 705         tcpd->mss_flags = cpu_to_le16(skb_tso_size(skb));
 706         tcpd->mss_flags |= TYPHOON_TSO_FIRST | TYPHOON_TSO_LAST;
 707         tcpd->respAddrLo = cpu_to_le32(tcpd_offset);
 708         tcpd->bytesTx = cpu_to_le32(skb->len);
 709         tcpd->status = 0;
 710 }
 711
 712 static netdev_tx_t
 713 typhoon_start_tx(struct sk_buff *skb, struct net_device *dev)
 714 {
 715         struct typhoon *tp = netdev_priv(dev);
 716         struct transmit_ring *txRing;
 717         struct tx_desc *txd, *first_txd;
 718         dma_addr_t skb_dma;
 719         int numDesc;
 720
 721         /* we have two rings to choose from, but we only use txLo for now
 722          * If we start using the Hi ring as well, we'll need to update
 723          * typhoon_stop_runtime(), typhoon_interrupt(), typhoon_num_free_tx(),
 724          * and TXHI_ENTRIES to match, as well as update the TSO code below
 725          * to get the right DMA address
 726          */
 727         txRing = &tp->txLoRing;
 728
 729         /* We need one descriptor for each fragment of the sk_buff, plus the
 730          * one for the ->data area of it.
 731          *
 732          * The docs say a maximum of 16 fragment descriptors per TCP option
 733          * descriptor, then make a new packet descriptor and option descriptor
 734          * for the next 16 fragments. The engineers say just an option
 735          * descriptor is needed. I've tested up to 26 fragments with a single
 736          * packet descriptor/option descriptor combo, so I use that for now.
 737          *
 738          * If problems develop with TSO, check this first.
 739          */
 740         numDesc = skb_shinfo(skb)->nr_frags + 1;
 741         if (skb_is_gso(skb))
 742                 numDesc++;
 743
 744         /* When checking for free space in the ring, we need to also
 745          * account for the initial Tx descriptor, and we always must leave
 746          * at least one descriptor unused in the ring so that it doesn't
 747          * wrap and look empty.
 748          *
 749          * The only time we should loop here is when we hit the race
 750          * between marking the queue awake and updating the cleared index.
 751          * Just loop and it will appear. This comes from the acenic driver.
 752          */
 753         while(unlikely(typhoon_num_free_tx(txRing) < (numDesc + 2)))
 754                 smp_rmb();
 755
 756         first_txd = (struct tx_desc *) (txRing->ringBase + txRing->lastWrite);
 757         typhoon_inc_tx_index(&txRing->lastWrite, 1);
 758
 759         first_txd->flags = TYPHOON_TX_DESC | TYPHOON_DESC_VALID;
 760         first_txd->numDesc = 0;
 761         first_txd->len = 0;
 762         first_txd->tx_addr = (u64)((unsigned long) skb);
 763         first_txd->processFlags = 0;
 764
 765         if(skb->ip_summed == CHECKSUM_PARTIAL) {
 766                 /* The 3XP will figure out if this is UDP/TCP */
 767                 first_txd->processFlags |= TYPHOON_TX_PF_TCP_CHKSUM;
 768                 first_txd->processFlags |= TYPHOON_TX_PF_UDP_CHKSUM;
 769                 first_txd->processFlags |= TYPHOON_TX_PF_IP_CHKSUM;
 770         }
 771
 772         if(vlan_tx_tag_present(skb)) {
 773                 first_txd->processFlags |=
 774                     TYPHOON_TX_PF_INSERT_VLAN | TYPHOON_TX_PF_VLAN_PRIORITY;
 775                 first_txd->processFlags |=
 776                     cpu_to_le32(htons(vlan_tx_tag_get(skb)) <<
 777                                 TYPHOON_TX_PF_VLAN_TAG_SHIFT);
 778         }
 779
 780         if (skb_is_gso(skb)) {
 781                 first_txd->processFlags |= TYPHOON_TX_PF_TCP_SEGMENT;
 782                 first_txd->numDesc++;
 783
 784                 typhoon_tso_fill(skb, txRing, tp->txlo_dma_addr);
 785         }
 786
 787         txd = (struct tx_desc *) (txRing->ringBase + txRing->lastWrite);
 788         typhoon_inc_tx_index(&txRing->lastWrite, 1);
 789
 790         /* No need to worry about padding packet -- the firmware pads
 791          * it with zeros to ETH_ZLEN for us.
 792          */
 793         if(skb_shinfo(skb)->nr_frags == 0) {
 794                 skb_dma = pci_map_single(tp->tx_pdev, skb->data, skb->len,
 795                                        PCI_DMA_TODEVICE);
 796                 txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID;
 797                 txd->len = cpu_to_le16(skb->len);
 798                 txd->frag.addr = cpu_to_le32(skb_dma);
 799                 txd->frag.addrHi = 0;
 800                 first_txd->numDesc++;
 801         } else {
 802                 int i, len;
 803
 804                 len = skb_headlen(skb);
 805                 skb_dma = pci_map_single(tp->tx_pdev, skb->data, len,
 806                                          PCI_DMA_TODEVICE);
 807                 txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID;
 808                 txd->len = cpu_to_le16(len);
 809                 txd->frag.addr = cpu_to_le32(skb_dma);
 810                 txd->frag.addrHi = 0;
 811                 first_txd->numDesc++;
 812
 813                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 814                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 815                         void *frag_addr;
 816
 817                         txd = (struct tx_desc *) (txRing->ringBase +
 818                                                 txRing->lastWrite);
 819                         typhoon_inc_tx_index(&txRing->lastWrite, 1);
 820
 821                         len = skb_frag_size(frag);
 822                         frag_addr = skb_frag_address(frag);
 823                         skb_dma = pci_map_single(tp->tx_pdev, frag_addr, len,
 824                                          PCI_DMA_TODEVICE);
 825                         txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID;
 826                         txd->len = cpu_to_le16(len);
 827                         txd->frag.addr = cpu_to_le32(skb_dma);
 828                         txd->frag.addrHi = 0;
 829                         first_txd->numDesc++;
 830                 }
 831         }
 832
 833         /* Kick the 3XP
 834          */
 835         wmb();
 836         iowrite32(txRing->lastWrite, tp->tx_ioaddr + txRing->writeRegister);
 837
 838         /* If we don't have room to put the worst case packet on the
 839          * queue, then we must stop the queue. We need 2 extra
 840          * descriptors -- one to prevent ring wrap, and one for the
 841          * Tx header.
 842          */
 843         numDesc = MAX_SKB_FRAGS + TSO_NUM_DESCRIPTORS + 1;
 844
 845         if(typhoon_num_free_tx(txRing) < (numDesc + 2)) {
 846                 netif_stop_queue(dev);
 847
 848                 /* A Tx complete IRQ could have gotten between, making
 849                  * the ring free again. Only need to recheck here, since
 850                  * Tx is serialized.
 851                  */
 852                 if(typhoon_num_free_tx(txRing) >= (numDesc + 2))
 853                         netif_wake_queue(dev);
 854         }
 855
 856         return NETDEV_TX_OK;
 857 }
 858
 859 static void
 860 typhoon_set_rx_mode(struct net_device *dev)
 861 {
 862         struct typhoon *tp = netdev_priv(dev);
 863         struct cmd_desc xp_cmd;
 864         u32 mc_filter[2];
 865         __le16 filter;
 866
 867         filter = TYPHOON_RX_FILTER_DIRECTED | TYPHOON_RX_FILTER_BROADCAST;
 868         if(dev->flags & IFF_PROMISC) {
 869                 filter |= TYPHOON_RX_FILTER_PROMISCOUS;
 870         } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
 871                   (dev->flags & IFF_ALLMULTI)) {
 872                 /* Too many to match, or accept all multicasts. */
 873                 filter |= TYPHOON_RX_FILTER_ALL_MCAST;
 874         } else if (!netdev_mc_empty(dev)) {
 875                 struct netdev_hw_addr *ha;
 876
 877                 memset(mc_filter, 0, sizeof(mc_filter));
 878                 netdev_for_each_mc_addr(ha, dev) {
 879                         int bit = ether_crc(ETH_ALEN, ha->addr) & 0x3f;
 880                         mc_filter[bit >> 5] |= 1 << (bit & 0x1f);
 881                 }
 882
 883                 INIT_COMMAND_NO_RESPONSE(&xp_cmd,
 884                                          TYPHOON_CMD_SET_MULTICAST_HASH);
 885                 xp_cmd.parm1 = TYPHOON_MCAST_HASH_SET;
 886                 xp_cmd.parm2 = cpu_to_le32(mc_filter[0]);
 887                 xp_cmd.parm3 = cpu_to_le32(mc_filter[1]);
 888                 typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
 889
 890                 filter |= TYPHOON_RX_FILTER_MCAST_HASH;
 891         }
 892
 893         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_RX_FILTER);
 894         xp_cmd.parm1 = filter;
 895         typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
 896 }
 897
 898 static int
 899 typhoon_do_get_stats(struct typhoon *tp)
 900 {
 901         struct net_device_stats *stats = &tp->stats;
 902         struct net_device_stats *saved = &tp->stats_saved;
 903         struct cmd_desc xp_cmd;
 904         struct resp_desc xp_resp[7];
 905         struct stats_resp *s = (struct stats_resp *) xp_resp;
 906         int err;
 907
 908         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_STATS);
 909         err = typhoon_issue_command(tp, 1, &xp_cmd, 7, xp_resp);
 910         if(err < 0)
 911                 return err;
 912
 913         /* 3Com's Linux driver uses txMultipleCollisions as it's
 914          * collisions value, but there is some other collision info as well...
 915          *
 916          * The extra status reported would be a good candidate for
 917          * ethtool_ops->get_{strings,stats}()
 918          */
 919         stats->tx_packets = le32_to_cpu(s->txPackets) +
 920                         saved->tx_packets;
 921         stats->tx_bytes = le64_to_cpu(s->txBytes) +
 922                         saved->tx_bytes;
 923         stats->tx_errors = le32_to_cpu(s->txCarrierLost) +
 924                         saved->tx_errors;
 925         stats->tx_carrier_errors = le32_to_cpu(s->txCarrierLost) +
 926                         saved->tx_carrier_errors;
 927         stats->collisions = le32_to_cpu(s->txMultipleCollisions) +
 928                         saved->collisions;
 929         stats->rx_packets = le32_to_cpu(s->rxPacketsGood) +
 930                         saved->rx_packets;
 931         stats->rx_bytes = le64_to_cpu(s->rxBytesGood) +
 932                         saved->rx_bytes;
 933         stats->rx_fifo_errors = le32_to_cpu(s->rxFifoOverruns) +
 934                         saved->rx_fifo_errors;
 935         stats->rx_errors = le32_to_cpu(s->rxFifoOverruns) +
 936                         le32_to_cpu(s->BadSSD) + le32_to_cpu(s->rxCrcErrors) +
 937                         saved->rx_errors;
 938         stats->rx_crc_errors = le32_to_cpu(s->rxCrcErrors) +
 939                         saved->rx_crc_errors;
 940         stats->rx_length_errors = le32_to_cpu(s->rxOversized) +
 941                         saved->rx_length_errors;
 942         tp->speed = (s->linkStatus & TYPHOON_LINK_100MBPS) ?
 943                         SPEED_100 : SPEED_10;
 944         tp->duplex = (s->linkStatus & TYPHOON_LINK_FULL_DUPLEX) ?
 945                         DUPLEX_FULL : DUPLEX_HALF;
 946
 947         return 0;
 948 }
 949
 950 static struct net_device_stats *
 951 typhoon_get_stats(struct net_device *dev)
 952 {
 953         struct typhoon *tp = netdev_priv(dev);
 954         struct net_device_stats *stats = &tp->stats;
 955         struct net_device_stats *saved = &tp->stats_saved;
 956
 957         smp_rmb();
 958         if(tp->card_state == Sleeping)
 959                 return saved;
 960
 961         if(typhoon_do_get_stats(tp) < 0) {
 962                 netdev_err(dev, "error getting stats\n");
 963                 return saved;
 964         }
 965
 966         return stats;
 967 }
 968
 969 static int
 970 typhoon_set_mac_address(struct net_device *dev, void *addr)
 971 {
 972         struct sockaddr *saddr = (struct sockaddr *) addr;
 973
 974         if(netif_running(dev))
 975                 return -EBUSY;
 976
 977         memcpy(dev->dev_addr, saddr->sa_data, dev->addr_len);
 978         return 0;
 979 }
 980
 981 static void
 982 typhoon_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 983 {
 984         struct typhoon *tp = netdev_priv(dev);
 985         struct pci_dev *pci_dev = tp->pdev;
 986         struct cmd_desc xp_cmd;
 987         struct resp_desc xp_resp[3];
 988
 989         smp_rmb();
 990         if(tp->card_state == Sleeping) {
 991                 strlcpy(info->fw_version, "Sleep image",
 992                         sizeof(info->fw_version));
 993         } else {
 994                 INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS);
 995                 if(typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp) < 0) {
 996                         strlcpy(info->fw_version, "Unknown runtime",
 997                                 sizeof(info->fw_version));
 998                 } else {
 999                         u32 sleep_ver = le32_to_cpu(xp_resp[0].parm2);
1000                         snprintf(info->fw_version, sizeof(info->fw_version),
1001                                 "%02x.%03x.%03x", sleep_ver >> 24,
1002                                 (sleep_ver >> 12) & 0xfff, sleep_ver & 0xfff);
1003                 }
1004         }
1005
1006         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
1007         strlcpy(info->bus_info, pci_name(pci_dev), sizeof(info->bus_info));
1008 }
1009
1010 static int
1011 typhoon_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1012 {
1013         struct typhoon *tp = netdev_priv(dev);
1014
1015         cmd->supported = SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1016                                 SUPPORTED_Autoneg;
1017
1018         switch (tp->xcvr_select) {
1019         case TYPHOON_XCVR_10HALF:
1020                 cmd->advertising = ADVERTISED_10baseT_Half;
1021                 break;
1022         case TYPHOON_XCVR_10FULL:
1023                 cmd->advertising = ADVERTISED_10baseT_Full;
1024                 break;
1025         case TYPHOON_XCVR_100HALF:
1026                 cmd->advertising = ADVERTISED_100baseT_Half;
1027                 break;
1028         case TYPHOON_XCVR_100FULL:
1029                 cmd->advertising = ADVERTISED_100baseT_Full;
1030                 break;
1031         case TYPHOON_XCVR_AUTONEG:
1032                 cmd->advertising = ADVERTISED_10baseT_Half |
1033                                             ADVERTISED_10baseT_Full |
1034                                             ADVERTISED_100baseT_Half |
1035                                             ADVERTISED_100baseT_Full |
1036                                             ADVERTISED_Autoneg;
1037                 break;
1038         }
1039
1040         if(tp->capabilities & TYPHOON_FIBER) {
1041                 cmd->supported |= SUPPORTED_FIBRE;
1042                 cmd->advertising |= ADVERTISED_FIBRE;
1043                 cmd->port = PORT_FIBRE;
1044         } else {
1045                 cmd->supported |= SUPPORTED_10baseT_Half |
1046                                         SUPPORTED_10baseT_Full |
1047                                         SUPPORTED_TP;
1048                 cmd->advertising |= ADVERTISED_TP;
1049                 cmd->port = PORT_TP;
1050         }
1051
1052         /* need to get stats to make these link speed/duplex valid */
1053         typhoon_do_get_stats(tp);
1054         ethtool_cmd_speed_set(cmd, tp->speed);
1055         cmd->duplex = tp->duplex;
1056         cmd->phy_address = 0;
1057         cmd->transceiver = XCVR_INTERNAL;
1058         if(tp->xcvr_select == TYPHOON_XCVR_AUTONEG)
1059                 cmd->autoneg = AUTONEG_ENABLE;
1060         else
1061                 cmd->autoneg = AUTONEG_DISABLE;
1062         cmd->maxtxpkt = 1;
1063         cmd->maxrxpkt = 1;
1064
1065         return 0;
1066 }
1067
1068 static int
1069 typhoon_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1070 {
1071         struct typhoon *tp = netdev_priv(dev);
1072         u32 speed = ethtool_cmd_speed(cmd);
1073         struct cmd_desc xp_cmd;
1074         __le16 xcvr;
1075         int err;
1076
1077         err = -EINVAL;
1078         if (cmd->autoneg == AUTONEG_ENABLE) {
1079                 xcvr = TYPHOON_XCVR_AUTONEG;
1080         } else {
1081                 if (cmd->duplex == DUPLEX_HALF) {
1082                         if (speed == SPEED_10)
1083                                 xcvr = TYPHOON_XCVR_10HALF;
1084                         else if (speed == SPEED_100)
1085                                 xcvr = TYPHOON_XCVR_100HALF;
1086                         else
1087                                 goto out;
1088                 } else if (cmd->duplex == DUPLEX_FULL) {
1089                         if (speed == SPEED_10)
1090                                 xcvr = TYPHOON_XCVR_10FULL;
1091                         else if (speed == SPEED_100)
1092                                 xcvr = TYPHOON_XCVR_100FULL;
1093                         else
1094                                 goto out;
1095                 } else
1096                         goto out;
1097         }
1098
1099         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_XCVR_SELECT);
1100         xp_cmd.parm1 = xcvr;
1101         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1102         if(err < 0)
1103                 goto out;
1104
1105         tp->xcvr_select = xcvr;
1106         if(cmd->autoneg == AUTONEG_ENABLE) {
1107                 tp->speed = 0xff;       /* invalid */
1108                 tp->duplex = 0xff;      /* invalid */
1109         } else {
1110                 tp->speed = speed;
1111                 tp->duplex = cmd->duplex;
1112         }
1113
1114 out:
1115         return err;
1116 }
1117
1118 static void
1119 typhoon_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1120 {
1121         struct typhoon *tp = netdev_priv(dev);
1122
1123         wol->supported = WAKE_PHY | WAKE_MAGIC;
1124         wol->wolopts = 0;
1125         if(tp->wol_events & TYPHOON_WAKE_LINK_EVENT)
1126                 wol->wolopts |= WAKE_PHY;
1127         if(tp->wol_events & TYPHOON_WAKE_MAGIC_PKT)
1128                 wol->wolopts |= WAKE_MAGIC;
1129         memset(&wol->sopass, 0, sizeof(wol->sopass));
1130 }
1131
1132 static int
1133 typhoon_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1134 {
1135         struct typhoon *tp = netdev_priv(dev);
1136
1137         if(wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
1138                 return -EINVAL;
1139
1140         tp->wol_events = 0;
1141         if(wol->wolopts & WAKE_PHY)
1142                 tp->wol_events |= TYPHOON_WAKE_LINK_EVENT;
1143         if(wol->wolopts & WAKE_MAGIC)
1144                 tp->wol_events |= TYPHOON_WAKE_MAGIC_PKT;
1145
1146         return 0;
1147 }
1148
1149 static void
1150 typhoon_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ering)
1151 {
1152         ering->rx_max_pending = RXENT_ENTRIES;
1153         ering->tx_max_pending = TXLO_ENTRIES - 1;
1154
1155         ering->rx_pending = RXENT_ENTRIES;
1156         ering->tx_pending = TXLO_ENTRIES - 1;
1157 }
1158
1159 static const struct ethtool_ops typhoon_ethtool_ops = {
1160         .get_settings           = typhoon_get_settings,
1161         .set_settings           = typhoon_set_settings,
1162         .get_drvinfo            = typhoon_get_drvinfo,
1163         .get_wol                = typhoon_get_wol,
1164         .set_wol                = typhoon_set_wol,
1165         .get_link               = ethtool_op_get_link,
1166         .get_ringparam          = typhoon_get_ringparam,
1167 };
1168
1169 static int
1170 typhoon_wait_interrupt(void __iomem *ioaddr)
1171 {
1172         int i, err = 0;
1173
1174         for(i = 0; i < TYPHOON_WAIT_TIMEOUT; i++) {
1175                 if(ioread32(ioaddr + TYPHOON_REG_INTR_STATUS) &
1176                    TYPHOON_INTR_BOOTCMD)
1177                         goto out;
1178                 udelay(TYPHOON_UDELAY);
1179         }
1180
1181         err = -ETIMEDOUT;
1182
1183 out:
1184         iowrite32(TYPHOON_INTR_BOOTCMD, ioaddr + TYPHOON_REG_INTR_STATUS);
1185         return err;
1186 }
1187
1188 #define shared_offset(x)        offsetof(struct typhoon_shared, x)
1189
1190 static void
1191 typhoon_init_interface(struct typhoon *tp)
1192 {
1193         struct typhoon_interface *iface = &tp->shared->iface;
1194         dma_addr_t shared_dma;
1195
1196         memset(tp->shared, 0, sizeof(struct typhoon_shared));
1197
1198         /* The *Hi members of iface are all init'd to zero by the memset().
1199          */
1200         shared_dma = tp->shared_dma + shared_offset(indexes);
1201         iface->ringIndex = cpu_to_le32(shared_dma);
1202
1203         shared_dma = tp->shared_dma + shared_offset(txLo);
1204         iface->txLoAddr = cpu_to_le32(shared_dma);
1205         iface->txLoSize = cpu_to_le32(TXLO_ENTRIES * sizeof(struct tx_desc));
1206
1207         shared_dma = tp->shared_dma + shared_offset(txHi);
1208         iface->txHiAddr = cpu_to_le32(shared_dma);
1209         iface->txHiSize = cpu_to_le32(TXHI_ENTRIES * sizeof(struct tx_desc));
1210
1211         shared_dma = tp->shared_dma + shared_offset(rxBuff);
1212         iface->rxBuffAddr = cpu_to_le32(shared_dma);
1213         iface->rxBuffSize = cpu_to_le32(RXFREE_ENTRIES *
1214                                         sizeof(struct rx_free));
1215
1216         shared_dma = tp->shared_dma + shared_offset(rxLo);
1217         iface->rxLoAddr = cpu_to_le32(shared_dma);
1218         iface->rxLoSize = cpu_to_le32(RX_ENTRIES * sizeof(struct rx_desc));
1219
1220         shared_dma = tp->shared_dma + shared_offset(rxHi);
1221         iface->rxHiAddr = cpu_to_le32(shared_dma);
1222         iface->rxHiSize = cpu_to_le32(RX_ENTRIES * sizeof(struct rx_desc));
1223
1224         shared_dma = tp->shared_dma + shared_offset(cmd);
1225         iface->cmdAddr = cpu_to_le32(shared_dma);
1226         iface->cmdSize = cpu_to_le32(COMMAND_RING_SIZE);
1227
1228         shared_dma = tp->shared_dma + shared_offset(resp);
1229         iface->respAddr = cpu_to_le32(shared_dma);
1230         iface->respSize = cpu_to_le32(RESPONSE_RING_SIZE);
1231
1232         shared_dma = tp->shared_dma + shared_offset(zeroWord);
1233         iface->zeroAddr = cpu_to_le32(shared_dma);
1234
1235         tp->indexes = &tp->shared->indexes;
1236         tp->txLoRing.ringBase = (u8 *) tp->shared->txLo;
1237         tp->txHiRing.ringBase = (u8 *) tp->shared->txHi;
1238         tp->rxLoRing.ringBase = (u8 *) tp->shared->rxLo;
1239         tp->rxHiRing.ringBase = (u8 *) tp->shared->rxHi;
1240         tp->rxBuffRing.ringBase = (u8 *) tp->shared->rxBuff;
1241         tp->cmdRing.ringBase = (u8 *) tp->shared->cmd;
1242         tp->respRing.ringBase = (u8 *) tp->shared->resp;
1243
1244         tp->txLoRing.writeRegister = TYPHOON_REG_TX_LO_READY;
1245         tp->txHiRing.writeRegister = TYPHOON_REG_TX_HI_READY;
1246
1247         tp->txlo_dma_addr = le32_to_cpu(iface->txLoAddr);
1248         tp->card_state = Sleeping;
1249
1250         tp->offload = TYPHOON_OFFLOAD_IP_CHKSUM | TYPHOON_OFFLOAD_TCP_CHKSUM;
1251         tp->offload |= TYPHOON_OFFLOAD_UDP_CHKSUM | TSO_OFFLOAD_ON;
1252         tp->offload |= TYPHOON_OFFLOAD_VLAN;
1253
1254         spin_lock_init(&tp->command_lock);
1255
1256         /* Force the writes to the shared memory area out before continuing. */
1257         wmb();
1258 }
1259
1260 static void
1261 typhoon_init_rings(struct typhoon *tp)
1262 {
1263         memset(tp->indexes, 0, sizeof(struct typhoon_indexes));
1264
1265         tp->txLoRing.lastWrite = 0;
1266         tp->txHiRing.lastWrite = 0;
1267         tp->rxLoRing.lastWrite = 0;
1268         tp->rxHiRing.lastWrite = 0;
1269         tp->rxBuffRing.lastWrite = 0;
1270         tp->cmdRing.lastWrite = 0;
1271         tp->respRing.lastWrite = 0;
1272
1273         tp->txLoRing.lastRead = 0;
1274         tp->txHiRing.lastRead = 0;
1275 }
1276
1277 static const struct firmware *typhoon_fw;
1278
1279 static int
1280 typhoon_request_firmware(struct typhoon *tp)
1281 {
1282         const struct typhoon_file_header *fHdr;
1283         const struct typhoon_section_header *sHdr;
1284         const u8 *image_data;
1285         u32 numSections;
1286         u32 section_len;
1287         u32 remaining;
1288         int err;
1289
1290         if (typhoon_fw)
1291                 return 0;
1292
1293         err = request_firmware(&typhoon_fw, FIRMWARE_NAME, &tp->pdev->dev);
1294         if (err) {
1295                 netdev_err(tp->dev, "Failed to load firmware \"%s\"\n",
1296                            FIRMWARE_NAME);
1297                 return err;
1298         }
1299
1300         image_data = (u8 *) typhoon_fw->data;
1301         remaining = typhoon_fw->size;
1302         if (remaining < sizeof(struct typhoon_file_header))
1303                 goto invalid_fw;
1304
1305         fHdr = (struct typhoon_file_header *) image_data;
1306         if (memcmp(fHdr->tag, "TYPHOON", 8))
1307                 goto invalid_fw;
1308
1309         numSections = le32_to_cpu(fHdr->numSections);
1310         image_data += sizeof(struct typhoon_file_header);
1311         remaining -= sizeof(struct typhoon_file_header);
1312
1313         while (numSections--) {
1314                 if (remaining < sizeof(struct typhoon_section_header))
1315                         goto invalid_fw;
1316
1317                 sHdr = (struct typhoon_section_header *) image_data;
1318                 image_data += sizeof(struct typhoon_section_header);
1319                 section_len = le32_to_cpu(sHdr->len);
1320
1321                 if (remaining < section_len)
1322                         goto invalid_fw;
1323
1324                 image_data += section_len;
1325                 remaining -= section_len;
1326         }
1327
1328         return 0;
1329
1330 invalid_fw:
1331         netdev_err(tp->dev, "Invalid firmware image\n");
1332         release_firmware(typhoon_fw);
1333         typhoon_fw = NULL;
1334         return -EINVAL;
1335 }
1336
1337 static int
1338 typhoon_download_firmware(struct typhoon *tp)
1339 {
1340         void __iomem *ioaddr = tp->ioaddr;
1341         struct pci_dev *pdev = tp->pdev;
1342         const struct typhoon_file_header *fHdr;
1343         const struct typhoon_section_header *sHdr;
1344         const u8 *image_data;
1345         void *dpage;
1346         dma_addr_t dpage_dma;
1347         __sum16 csum;
1348         u32 irqEnabled;
1349         u32 irqMasked;
1350         u32 numSections;
1351         u32 section_len;
1352         u32 len;
1353         u32 load_addr;
1354         u32 hmac;
1355         int i;
1356         int err;
1357
1358         image_data = (u8 *) typhoon_fw->data;
1359         fHdr = (struct typhoon_file_header *) image_data;
1360
1361         /* Cannot just map the firmware image using pci_map_single() as
1362          * the firmware is vmalloc()'d and may not be physically contiguous,
1363          * so we allocate some consistent memory to copy the sections into.
1364          */
1365         err = -ENOMEM;
1366         dpage = pci_alloc_consistent(pdev, PAGE_SIZE, &dpage_dma);
1367         if(!dpage) {
1368                 netdev_err(tp->dev, "no DMA mem for firmware\n");
1369                 goto err_out;
1370         }
1371
1372         irqEnabled = ioread32(ioaddr + TYPHOON_REG_INTR_ENABLE);
1373         iowrite32(irqEnabled | TYPHOON_INTR_BOOTCMD,
1374                ioaddr + TYPHOON_REG_INTR_ENABLE);
1375         irqMasked = ioread32(ioaddr + TYPHOON_REG_INTR_MASK);
1376         iowrite32(irqMasked | TYPHOON_INTR_BOOTCMD,
1377                ioaddr + TYPHOON_REG_INTR_MASK);
1378
1379         err = -ETIMEDOUT;
1380         if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) {
1381                 netdev_err(tp->dev, "card ready timeout\n");
1382                 goto err_out_irq;
1383         }
1384
1385         numSections = le32_to_cpu(fHdr->numSections);
1386         load_addr = le32_to_cpu(fHdr->startAddr);
1387
1388         iowrite32(TYPHOON_INTR_BOOTCMD, ioaddr + TYPHOON_REG_INTR_STATUS);
1389         iowrite32(load_addr, ioaddr + TYPHOON_REG_DOWNLOAD_BOOT_ADDR);
1390         hmac = le32_to_cpu(fHdr->hmacDigest[0]);
1391         iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_0);
1392         hmac = le32_to_cpu(fHdr->hmacDigest[1]);
1393         iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_1);
1394         hmac = le32_to_cpu(fHdr->hmacDigest[2]);
1395         iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_2);
1396         hmac = le32_to_cpu(fHdr->hmacDigest[3]);
1397         iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_3);
1398         hmac = le32_to_cpu(fHdr->hmacDigest[4]);
1399         iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_4);
1400         typhoon_post_pci_writes(ioaddr);
1401         iowrite32(TYPHOON_BOOTCMD_RUNTIME_IMAGE, ioaddr + TYPHOON_REG_COMMAND);
1402
1403         image_data += sizeof(struct typhoon_file_header);
1404
1405         /* The ioread32() in typhoon_wait_interrupt() will force the
1406          * last write to the command register to post, so
1407          * we don't need a typhoon_post_pci_writes() after it.
1408          */
1409         for(i = 0; i < numSections; i++) {
1410                 sHdr = (struct typhoon_section_header *) image_data;
1411                 image_data += sizeof(struct typhoon_section_header);
1412                 load_addr = le32_to_cpu(sHdr->startAddr);
1413                 section_len = le32_to_cpu(sHdr->len);
1414
1415                 while(section_len) {
1416                         len = min_t(u32, section_len, PAGE_SIZE);
1417
1418                         if(typhoon_wait_interrupt(ioaddr) < 0 ||
1419                            ioread32(ioaddr + TYPHOON_REG_STATUS) !=
1420                            TYPHOON_STATUS_WAITING_FOR_SEGMENT) {
1421                                 netdev_err(tp->dev, "segment ready timeout\n");
1422                                 goto err_out_irq;
1423                         }
1424
1425                         /* Do an pseudo IPv4 checksum on the data -- first
1426                          * need to convert each u16 to cpu order before
1427                          * summing. Fortunately, due to the properties of
1428                          * the checksum, we can do this once, at the end.
1429                          */
1430                         csum = csum_fold(csum_partial_copy_nocheck(image_data,
1431                                                                    dpage, len,
1432                                                                    0));
1433
1434                         iowrite32(len, ioaddr + TYPHOON_REG_BOOT_LENGTH);
1435                         iowrite32(le16_to_cpu((__force __le16)csum),
1436                                         ioaddr + TYPHOON_REG_BOOT_CHECKSUM);
1437                         iowrite32(load_addr,
1438                                         ioaddr + TYPHOON_REG_BOOT_DEST_ADDR);
1439                         iowrite32(0, ioaddr + TYPHOON_REG_BOOT_DATA_HI);
1440                         iowrite32(dpage_dma, ioaddr + TYPHOON_REG_BOOT_DATA_LO);
1441                         typhoon_post_pci_writes(ioaddr);
1442                         iowrite32(TYPHOON_BOOTCMD_SEG_AVAILABLE,
1443                                         ioaddr + TYPHOON_REG_COMMAND);
1444
1445                         image_data += len;
1446                         load_addr += len;
1447                         section_len -= len;
1448                 }
1449         }
1450
1451         if(typhoon_wait_interrupt(ioaddr) < 0 ||
1452            ioread32(ioaddr + TYPHOON_REG_STATUS) !=
1453            TYPHOON_STATUS_WAITING_FOR_SEGMENT) {
1454                 netdev_err(tp->dev, "final segment ready timeout\n");
1455                 goto err_out_irq;
1456         }
1457
1458         iowrite32(TYPHOON_BOOTCMD_DNLD_COMPLETE, ioaddr + TYPHOON_REG_COMMAND);
1459
1460         if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_BOOT) < 0) {
1461                 netdev_err(tp->dev, "boot ready timeout, status 0x%0x\n",
1462                            ioread32(ioaddr + TYPHOON_REG_STATUS));
1463                 goto err_out_irq;
1464         }
1465
1466         err = 0;
1467
1468 err_out_irq:
1469         iowrite32(irqMasked, ioaddr + TYPHOON_REG_INTR_MASK);
1470         iowrite32(irqEnabled, ioaddr + TYPHOON_REG_INTR_ENABLE);
1471
1472         pci_free_consistent(pdev, PAGE_SIZE, dpage, dpage_dma);
1473
1474 err_out:
1475         return err;
1476 }
1477
1478 static int
1479 typhoon_boot_3XP(struct typhoon *tp, u32 initial_status)
1480 {
1481         void __iomem *ioaddr = tp->ioaddr;
1482
1483         if(typhoon_wait_status(ioaddr, initial_status) < 0) {
1484                 netdev_err(tp->dev, "boot ready timeout\n");
1485                 goto out_timeout;
1486         }
1487
1488         iowrite32(0, ioaddr + TYPHOON_REG_BOOT_RECORD_ADDR_HI);
1489         iowrite32(tp->shared_dma, ioaddr + TYPHOON_REG_BOOT_RECORD_ADDR_LO);
1490         typhoon_post_pci_writes(ioaddr);
1491         iowrite32(TYPHOON_BOOTCMD_REG_BOOT_RECORD,
1492                                 ioaddr + TYPHOON_REG_COMMAND);
1493
1494         if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_RUNNING) < 0) {
1495                 netdev_err(tp->dev, "boot finish timeout (status 0x%x)\n",
1496                            ioread32(ioaddr + TYPHOON_REG_STATUS));
1497                 goto out_timeout;
1498         }
1499
1500         /* Clear the Transmit and Command ready registers
1501          */
1502         iowrite32(0, ioaddr + TYPHOON_REG_TX_HI_READY);
1503         iowrite32(0, ioaddr + TYPHOON_REG_CMD_READY);
1504         iowrite32(0, ioaddr + TYPHOON_REG_TX_LO_READY);
1505         typhoon_post_pci_writes(ioaddr);
1506         iowrite32(TYPHOON_BOOTCMD_BOOT, ioaddr + TYPHOON_REG_COMMAND);
1507
1508         return 0;
1509
1510 out_timeout:
1511         return -ETIMEDOUT;
1512 }
1513
1514 static u32
1515 typhoon_clean_tx(struct typhoon *tp, struct transmit_ring *txRing,
1516                         volatile __le32 * index)
1517 {
1518         u32 lastRead = txRing->lastRead;
1519         struct tx_desc *tx;
1520         dma_addr_t skb_dma;
1521         int dma_len;
1522         int type;
1523
1524         while(lastRead != le32_to_cpu(*index)) {
1525                 tx = (struct tx_desc *) (txRing->ringBase + lastRead);
1526                 type = tx->flags & TYPHOON_TYPE_MASK;
1527
1528                 if(type == TYPHOON_TX_DESC) {
1529                         /* This tx_desc describes a packet.
1530                          */
1531                         unsigned long ptr = tx->tx_addr;
1532                         struct sk_buff *skb = (struct sk_buff *) ptr;
1533                         dev_kfree_skb_irq(skb);
1534                 } else if(type == TYPHOON_FRAG_DESC) {
1535                         /* This tx_desc describes a memory mapping. Free it.
1536                          */
1537                         skb_dma = (dma_addr_t) le32_to_cpu(tx->frag.addr);
1538                         dma_len = le16_to_cpu(tx->len);
1539                         pci_unmap_single(tp->pdev, skb_dma, dma_len,
1540                                        PCI_DMA_TODEVICE);
1541                 }
1542
1543                 tx->flags = 0;
1544                 typhoon_inc_tx_index(&lastRead, 1);
1545         }
1546
1547         return lastRead;
1548 }
1549
1550 static void
1551 typhoon_tx_complete(struct typhoon *tp, struct transmit_ring *txRing,
1552                         volatile __le32 * index)
1553 {
1554         u32 lastRead;
1555         int numDesc = MAX_SKB_FRAGS + 1;
1556
1557         /* This will need changing if we start to use the Hi Tx ring. */
1558         lastRead = typhoon_clean_tx(tp, txRing, index);
1559         if(netif_queue_stopped(tp->dev) && typhoon_num_free(txRing->lastWrite,
1560                                 lastRead, TXLO_ENTRIES) > (numDesc + 2))
1561                 netif_wake_queue(tp->dev);
1562
1563         txRing->lastRead = lastRead;
1564         smp_wmb();
1565 }
1566
1567 static void
1568 typhoon_recycle_rx_skb(struct typhoon *tp, u32 idx)
1569 {
1570         struct typhoon_indexes *indexes = tp->indexes;
1571         struct rxbuff_ent *rxb = &tp->rxbuffers[idx];
1572         struct basic_ring *ring = &tp->rxBuffRing;
1573         struct rx_free *r;
1574
1575         if((ring->lastWrite + sizeof(*r)) % (RXFREE_ENTRIES * sizeof(*r)) ==
1576                                 le32_to_cpu(indexes->rxBuffCleared)) {
1577                 /* no room in ring, just drop the skb
1578                  */
1579                 dev_kfree_skb_any(rxb->skb);
1580                 rxb->skb = NULL;
1581                 return;
1582         }
1583
1584         r = (struct rx_free *) (ring->ringBase + ring->lastWrite);
1585         typhoon_inc_rxfree_index(&ring->lastWrite, 1);
1586         r->virtAddr = idx;
1587         r->physAddr = cpu_to_le32(rxb->dma_addr);
1588
1589         /* Tell the card about it */
1590         wmb();
1591         indexes->rxBuffReady = cpu_to_le32(ring->lastWrite);
1592 }
1593
1594 static int
1595 typhoon_alloc_rx_skb(struct typhoon *tp, u32 idx)
1596 {
1597         struct typhoon_indexes *indexes = tp->indexes;
1598         struct rxbuff_ent *rxb = &tp->rxbuffers[idx];
1599         struct basic_ring *ring = &tp->rxBuffRing;
1600         struct rx_free *r;
1601         struct sk_buff *skb;
1602         dma_addr_t dma_addr;
1603
1604         rxb->skb = NULL;
1605
1606         if((ring->lastWrite + sizeof(*r)) % (RXFREE_ENTRIES * sizeof(*r)) ==
1607                                 le32_to_cpu(indexes->rxBuffCleared))
1608                 return -ENOMEM;
1609
1610         skb = netdev_alloc_skb(tp->dev, PKT_BUF_SZ);
1611         if(!skb)
1612                 return -ENOMEM;
1613
1614 #if 0
1615         /* Please, 3com, fix the firmware to allow DMA to a unaligned
1616          * address! Pretty please?
1617          */
1618         skb_reserve(skb, 2);
1619 #endif
1620
1621         dma_addr = pci_map_single(tp->pdev, skb->data,
1622                                   PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
1623
1624         /* Since no card does 64 bit DAC, the high bits will never
1625          * change from zero.
1626          */
1627         r = (struct rx_free *) (ring->ringBase + ring->lastWrite);
1628         typhoon_inc_rxfree_index(&ring->lastWrite, 1);
1629         r->virtAddr = idx;
1630         r->physAddr = cpu_to_le32(dma_addr);
1631         rxb->skb = skb;
1632         rxb->dma_addr = dma_addr;
1633
1634         /* Tell the card about it */
1635         wmb();
1636         indexes->rxBuffReady = cpu_to_le32(ring->lastWrite);
1637         return 0;
1638 }
1639
1640 static int
1641 typhoon_rx(struct typhoon *tp, struct basic_ring *rxRing, volatile __le32 * ready,
1642            volatile __le32 * cleared, int budget)
1643 {
1644         struct rx_desc *rx;
1645         struct sk_buff *skb, *new_skb;
1646         struct rxbuff_ent *rxb;
1647         dma_addr_t dma_addr;
1648         u32 local_ready;
1649         u32 rxaddr;
1650         int pkt_len;
1651         u32 idx;
1652         __le32 csum_bits;
1653         int received;
1654
1655         received = 0;
1656         local_ready = le32_to_cpu(*ready);
1657         rxaddr = le32_to_cpu(*cleared);
1658         while(rxaddr != local_ready && budget > 0) {
1659                 rx = (struct rx_desc *) (rxRing->ringBase + rxaddr);
1660                 idx = rx->addr;
1661                 rxb = &tp->rxbuffers[idx];
1662                 skb = rxb->skb;
1663                 dma_addr = rxb->dma_addr;
1664
1665                 typhoon_inc_rx_index(&rxaddr, 1);
1666
1667                 if(rx->flags & TYPHOON_RX_ERROR) {
1668                         typhoon_recycle_rx_skb(tp, idx);
1669                         continue;
1670                 }
1671
1672                 pkt_len = le16_to_cpu(rx->frameLen);
1673
1674                 if(pkt_len < rx_copybreak &&
1675                    (new_skb = netdev_alloc_skb(tp->dev, pkt_len + 2)) != NULL) {
1676                         skb_reserve(new_skb, 2);
1677                         pci_dma_sync_single_for_cpu(tp->pdev, dma_addr,
1678                                                     PKT_BUF_SZ,
1679                                                     PCI_DMA_FROMDEVICE);
1680                         skb_copy_to_linear_data(new_skb, skb->data, pkt_len);
1681                         pci_dma_sync_single_for_device(tp->pdev, dma_addr,
1682                                                        PKT_BUF_SZ,
1683                                                        PCI_DMA_FROMDEVICE);
1684                         skb_put(new_skb, pkt_len);
1685                         typhoon_recycle_rx_skb(tp, idx);
1686                 } else {
1687                         new_skb = skb;
1688                         skb_put(new_skb, pkt_len);
1689                         pci_unmap_single(tp->pdev, dma_addr, PKT_BUF_SZ,
1690                                        PCI_DMA_FROMDEVICE);
1691                         typhoon_alloc_rx_skb(tp, idx);
1692                 }
1693                 new_skb->protocol = eth_type_trans(new_skb, tp->dev);
1694                 csum_bits = rx->rxStatus & (TYPHOON_RX_IP_CHK_GOOD |
1695                         TYPHOON_RX_UDP_CHK_GOOD | TYPHOON_RX_TCP_CHK_GOOD);
1696                 if(csum_bits ==
1697                    (TYPHOON_RX_IP_CHK_GOOD | TYPHOON_RX_TCP_CHK_GOOD) ||
1698                    csum_bits ==
1699                    (TYPHOON_RX_IP_CHK_GOOD | TYPHOON_RX_UDP_CHK_GOOD)) {
1700                         new_skb->ip_summed = CHECKSUM_UNNECESSARY;
1701                 } else
1702                         skb_checksum_none_assert(new_skb);
1703
1704                 if (rx->rxStatus & TYPHOON_RX_VLAN)
1705                         __vlan_hwaccel_put_tag(new_skb,
1706                                                ntohl(rx->vlanTag) & 0xffff);
1707                 netif_receive_skb(new_skb);
1708
1709                 received++;
1710                 budget--;
1711         }
1712         *cleared = cpu_to_le32(rxaddr);
1713
1714         return received;
1715 }
1716
1717 static void
1718 typhoon_fill_free_ring(struct typhoon *tp)
1719 {
1720         u32 i;
1721
1722         for(i = 0; i < RXENT_ENTRIES; i++) {
1723                 struct rxbuff_ent *rxb = &tp->rxbuffers[i];
1724                 if(rxb->skb)
1725                         continue;
1726                 if(typhoon_alloc_rx_skb(tp, i) < 0)
1727                         break;
1728         }
1729 }
1730
1731 static int
1732 typhoon_poll(struct napi_struct *napi, int budget)
1733 {
1734         struct typhoon *tp = container_of(napi, struct typhoon, napi);
1735         struct typhoon_indexes *indexes = tp->indexes;
1736         int work_done;
1737
1738         rmb();
1739         if(!tp->awaiting_resp && indexes->respReady != indexes->respCleared)
1740                         typhoon_process_response(tp, 0, NULL);
1741
1742         if(le32_to_cpu(indexes->txLoCleared) != tp->txLoRing.lastRead)
1743                 typhoon_tx_complete(tp, &tp->txLoRing, &indexes->txLoCleared);
1744
1745         work_done = 0;
1746
1747         if(indexes->rxHiCleared != indexes->rxHiReady) {
1748                 work_done += typhoon_rx(tp, &tp->rxHiRing, &indexes->rxHiReady,
1749                                         &indexes->rxHiCleared, budget);
1750         }
1751
1752         if(indexes->rxLoCleared != indexes->rxLoReady) {
1753                 work_done += typhoon_rx(tp, &tp->rxLoRing, &indexes->rxLoReady,
1754                                         &indexes->rxLoCleared, budget - work_done);
1755         }
1756
1757         if(le32_to_cpu(indexes->rxBuffCleared) == tp->rxBuffRing.lastWrite) {
1758                 /* rxBuff ring is empty, try to fill it. */
1759                 typhoon_fill_free_ring(tp);
1760         }
1761
1762         if (work_done < budget) {
1763                 napi_complete(napi);
1764                 iowrite32(TYPHOON_INTR_NONE,
1765                                 tp->ioaddr + TYPHOON_REG_INTR_MASK);
1766                 typhoon_post_pci_writes(tp->ioaddr);
1767         }
1768
1769         return work_done;
1770 }
1771
1772 static irqreturn_t
1773 typhoon_interrupt(int irq, void *dev_instance)
1774 {
1775         struct net_device *dev = dev_instance;
1776         struct typhoon *tp = netdev_priv(dev);
1777         void __iomem *ioaddr = tp->ioaddr;
1778         u32 intr_status;
1779
1780         intr_status = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
1781         if(!(intr_status & TYPHOON_INTR_HOST_INT))
1782                 return IRQ_NONE;
1783
1784         iowrite32(intr_status, ioaddr + TYPHOON_REG_INTR_STATUS);
1785
1786         if (napi_schedule_prep(&tp->napi)) {
1787                 iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
1788                 typhoon_post_pci_writes(ioaddr);
1789                 __napi_schedule(&tp->napi);
1790         } else {
1791                 netdev_err(dev, "Error, poll already scheduled\n");
1792         }
1793         return IRQ_HANDLED;
1794 }
1795
1796 static void
1797 typhoon_free_rx_rings(struct typhoon *tp)
1798 {
1799         u32 i;
1800
1801         for(i = 0; i < RXENT_ENTRIES; i++) {
1802                 struct rxbuff_ent *rxb = &tp->rxbuffers[i];
1803                 if(rxb->skb) {
1804                         pci_unmap_single(tp->pdev, rxb->dma_addr, PKT_BUF_SZ,
1805                                        PCI_DMA_FROMDEVICE);
1806                         dev_kfree_skb(rxb->skb);
1807                         rxb->skb = NULL;
1808                 }
1809         }
1810 }
1811
1812 static int
1813 typhoon_sleep(struct typhoon *tp, pci_power_t state, __le16 events)
1814 {
1815         struct pci_dev *pdev = tp->pdev;
1816         void __iomem *ioaddr = tp->ioaddr;
1817         struct cmd_desc xp_cmd;
1818         int err;
1819
1820         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_ENABLE_WAKE_EVENTS);
1821         xp_cmd.parm1 = events;
1822         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1823         if(err < 0) {
1824                 netdev_err(tp->dev, "typhoon_sleep(): wake events cmd err %d\n",
1825                            err);
1826                 return err;
1827         }
1828
1829         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_GOTO_SLEEP);
1830         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1831         if(err < 0) {
1832                 netdev_err(tp->dev, "typhoon_sleep(): sleep cmd err %d\n", err);
1833                 return err;
1834         }
1835
1836         if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_SLEEPING) < 0)
1837                 return -ETIMEDOUT;
1838
1839         /* Since we cannot monitor the status of the link while sleeping,
1840          * tell the world it went away.
1841          */
1842         netif_carrier_off(tp->dev);
1843
1844         pci_enable_wake(tp->pdev, state, 1);
1845         pci_disable_device(pdev);
1846         return pci_set_power_state(pdev, state);
1847 }
1848
1849 static int
1850 typhoon_wakeup(struct typhoon *tp, int wait_type)
1851 {
1852         struct pci_dev *pdev = tp->pdev;
1853         void __iomem *ioaddr = tp->ioaddr;
1854
1855         pci_set_power_state(pdev, PCI_D0);
1856         pci_restore_state(pdev);
1857
1858         /* Post 2.x.x versions of the Sleep Image require a reset before
1859          * we can download the Runtime Image. But let's not make users of
1860          * the old firmware pay for the reset.
1861          */
1862         iowrite32(TYPHOON_BOOTCMD_WAKEUP, ioaddr + TYPHOON_REG_COMMAND);
1863         if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 ||
1864                         (tp->capabilities & TYPHOON_WAKEUP_NEEDS_RESET))
1865                 return typhoon_reset(ioaddr, wait_type);
1866
1867         return 0;
1868 }
1869
1870 static int
1871 typhoon_start_runtime(struct typhoon *tp)
1872 {
1873         struct net_device *dev = tp->dev;
1874         void __iomem *ioaddr = tp->ioaddr;
1875         struct cmd_desc xp_cmd;
1876         int err;
1877
1878         typhoon_init_rings(tp);
1879         typhoon_fill_free_ring(tp);
1880
1881         err = typhoon_download_firmware(tp);
1882         if(err < 0) {
1883                 netdev_err(tp->dev, "cannot load runtime on 3XP\n");
1884                 goto error_out;
1885         }
1886
1887         if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_BOOT) < 0) {
1888                 netdev_err(tp->dev, "cannot boot 3XP\n");
1889                 err = -EIO;
1890                 goto error_out;
1891         }
1892
1893         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAX_PKT_SIZE);
1894         xp_cmd.parm1 = cpu_to_le16(PKT_BUF_SZ);
1895         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1896         if(err < 0)
1897                 goto error_out;
1898
1899         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAC_ADDRESS);
1900         xp_cmd.parm1 = cpu_to_le16(ntohs(*(__be16 *)&dev->dev_addr[0]));
1901         xp_cmd.parm2 = cpu_to_le32(ntohl(*(__be32 *)&dev->dev_addr[2]));
1902         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1903         if(err < 0)
1904                 goto error_out;
1905
1906         /* Disable IRQ coalescing -- we can reenable it when 3Com gives
1907          * us some more information on how to control it.
1908          */
1909         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_IRQ_COALESCE_CTRL);
1910         xp_cmd.parm1 = 0;
1911         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1912         if(err < 0)
1913                 goto error_out;
1914
1915         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_XCVR_SELECT);
1916         xp_cmd.parm1 = tp->xcvr_select;
1917         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1918         if(err < 0)
1919                 goto error_out;
1920
1921         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_VLAN_TYPE_WRITE);
1922         xp_cmd.parm1 = cpu_to_le16(ETH_P_8021Q);
1923         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1924         if(err < 0)
1925                 goto error_out;
1926
1927         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_OFFLOAD_TASKS);
1928         xp_cmd.parm2 = tp->offload;
1929         xp_cmd.parm3 = tp->offload;
1930         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1931         if(err < 0)
1932                 goto error_out;
1933
1934         typhoon_set_rx_mode(dev);
1935
1936         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_TX_ENABLE);
1937         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1938         if(err < 0)
1939                 goto error_out;
1940
1941         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_RX_ENABLE);
1942         err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1943         if(err < 0)
1944                 goto error_out;
1945
1946         tp->card_state = Running;
1947         smp_wmb();
1948
1949         iowrite32(TYPHOON_INTR_ENABLE_ALL, ioaddr + TYPHOON_REG_INTR_ENABLE);
1950         iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_MASK);
1951         typhoon_post_pci_writes(ioaddr);
1952
1953         return 0;
1954
1955 error_out:
1956         typhoon_reset(ioaddr, WaitNoSleep);
1957         typhoon_free_rx_rings(tp);
1958         typhoon_init_rings(tp);
1959         return err;
1960 }
1961
1962 static int
1963 typhoon_stop_runtime(struct typhoon *tp, int wait_type)
1964 {
1965         struct typhoon_indexes *indexes = tp->indexes;
1966         struct transmit_ring *txLo = &tp->txLoRing;
1967         void __iomem *ioaddr = tp->ioaddr;
1968         struct cmd_desc xp_cmd;
1969         int i;
1970
1971         /* Disable interrupts early, since we can't schedule a poll
1972          * when called with !netif_running(). This will be posted
1973          * when we force the posting of the command.
1974          */
1975         iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_ENABLE);
1976
1977         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_RX_DISABLE);
1978         typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1979
1980         /* Wait 1/2 sec for any outstanding transmits to occur
1981          * We'll cleanup after the reset if this times out.
1982          */
1983         for(i = 0; i < TYPHOON_WAIT_TIMEOUT; i++) {
1984                 if(indexes->txLoCleared == cpu_to_le32(txLo->lastWrite))
1985                         break;
1986                 udelay(TYPHOON_UDELAY);
1987         }
1988
1989         if(i == TYPHOON_WAIT_TIMEOUT)
1990                 netdev_err(tp->dev, "halt timed out waiting for Tx to complete\n");
1991
1992         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_TX_DISABLE);
1993         typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
1994
1995         /* save the statistics so when we bring the interface up again,
1996          * the values reported to userspace are correct.
1997          */
1998         tp->card_state = Sleeping;
1999         smp_wmb();
2000         typhoon_do_get_stats(tp);
2001         memcpy(&tp->stats_saved, &tp->stats, sizeof(struct net_device_stats));
2002
2003         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_HALT);
2004         typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL);
2005
2006         if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_HALTED) < 0)
2007                 netdev_err(tp->dev, "timed out waiting for 3XP to halt\n");
2008
2009         if(typhoon_reset(ioaddr, wait_type) < 0) {
2010                 netdev_err(tp->dev, "unable to reset 3XP\n");
2011                 return -ETIMEDOUT;
2012         }
2013
2014         /* cleanup any outstanding Tx packets */
2015         if(indexes->txLoCleared != cpu_to_le32(txLo->lastWrite)) {
2016                 indexes->txLoCleared = cpu_to_le32(txLo->lastWrite);
2017                 typhoon_clean_tx(tp, &tp->txLoRing, &indexes->txLoCleared);
2018         }
2019
2020         return 0;
2021 }
2022
2023 static void
2024 typhoon_tx_timeout(struct net_device *dev)
2025 {
2026         struct typhoon *tp = netdev_priv(dev);
2027
2028         if(typhoon_reset(tp->ioaddr, WaitNoSleep) < 0) {
2029                 netdev_warn(dev, "could not reset in tx timeout\n");
2030                 goto truly_dead;
2031         }
2032
2033         /* If we ever start using the Hi ring, it will need cleaning too */
2034         typhoon_clean_tx(tp, &tp->txLoRing, &tp->indexes->txLoCleared);
2035         typhoon_free_rx_rings(tp);
2036
2037         if(typhoon_start_runtime(tp) < 0) {
2038                 netdev_err(dev, "could not start runtime in tx timeout\n");
2039                 goto truly_dead;
2040         }
2041
2042         netif_wake_queue(dev);
2043         return;
2044
2045 truly_dead:
2046         /* Reset the hardware, and turn off carrier to avoid more timeouts */
2047         typhoon_reset(tp->ioaddr, NoWait);
2048         netif_carrier_off(dev);
2049 }
2050
2051 static int
2052 typhoon_open(struct net_device *dev)
2053 {
2054         struct typhoon *tp = netdev_priv(dev);
2055         int err;
2056
2057         err = typhoon_request_firmware(tp);
2058         if (err)
2059                 goto out;
2060
2061         err = typhoon_wakeup(tp, WaitSleep);
2062         if(err < 0) {
2063                 netdev_err(dev, "unable to wakeup device\n");
2064                 goto out_sleep;
2065         }
2066
2067         err = request_irq(dev->irq, typhoon_interrupt, IRQF_SHARED,
2068                                 dev->name, dev);
2069         if(err < 0)
2070                 goto out_sleep;
2071
2072         napi_enable(&tp->napi);
2073
2074         err = typhoon_start_runtime(tp);
2075         if(err < 0) {
2076                 napi_disable(&tp->napi);
2077                 goto out_irq;
2078         }
2079
2080         netif_start_queue(dev);
2081         return 0;
2082
2083 out_irq:
2084         free_irq(dev->irq, dev);
2085
2086 out_sleep:
2087         if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) {
2088                 netdev_err(dev, "unable to reboot into sleep img\n");
2089                 typhoon_reset(tp->ioaddr, NoWait);
2090                 goto out;
2091         }
2092
2093         if(typhoon_sleep(tp, PCI_D3hot, 0) < 0)
2094                 netdev_err(dev, "unable to go back to sleep\n");
2095
2096 out:
2097         return err;
2098 }
2099
2100 static int
2101 typhoon_close(struct net_device *dev)
2102 {
2103         struct typhoon *tp = netdev_priv(dev);
2104
2105         netif_stop_queue(dev);
2106         napi_disable(&tp->napi);
2107
2108         if(typhoon_stop_runtime(tp, WaitSleep) < 0)
2109                 netdev_err(dev, "unable to stop runtime\n");
2110
2111         /* Make sure there is no irq handler running on a different CPU. */
2112         free_irq(dev->irq, dev);
2113
2114         typhoon_free_rx_rings(tp);
2115         typhoon_init_rings(tp);
2116
2117         if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0)
2118                 netdev_err(dev, "unable to boot sleep image\n");
2119
2120         if(typhoon_sleep(tp, PCI_D3hot, 0) < 0)
2121                 netdev_err(dev, "unable to put card to sleep\n");
2122
2123         return 0;
2124 }
2125
2126 #ifdef CONFIG_PM
2127 static int
2128 typhoon_resume(struct pci_dev *pdev)
2129 {
2130         struct net_device *dev = pci_get_drvdata(pdev);
2131         struct typhoon *tp = netdev_priv(dev);
2132
2133         /* If we're down, resume when we are upped.
2134          */
2135         if(!netif_running(dev))
2136                 return 0;
2137
2138         if(typhoon_wakeup(tp, WaitNoSleep) < 0) {
2139                 netdev_err(dev, "critical: could not wake up in resume\n");
2140                 goto reset;
2141         }
2142
2143         if(typhoon_start_runtime(tp) < 0) {
2144                 netdev_err(dev, "critical: could not start runtime in resume\n");
2145                 goto reset;
2146         }
2147
2148         netif_device_attach(dev);
2149         return 0;
2150
2151 reset:
2152         typhoon_reset(tp->ioaddr, NoWait);
2153         return -EBUSY;
2154 }
2155
2156 static int
2157 typhoon_suspend(struct pci_dev *pdev, pm_message_t state)
2158 {
2159         struct net_device *dev = pci_get_drvdata(pdev);
2160         struct typhoon *tp = netdev_priv(dev);
2161         struct cmd_desc xp_cmd;
2162
2163         /* If we're down, we're already suspended.
2164          */
2165         if(!netif_running(dev))
2166                 return 0;
2167
2168         /* TYPHOON_OFFLOAD_VLAN is always on now, so this doesn't work */
2169         if(tp->wol_events & TYPHOON_WAKE_MAGIC_PKT)
2170                 netdev_warn(dev, "cannot do WAKE_MAGIC with VLAN offloading\n");
2171
2172         netif_device_detach(dev);
2173
2174         if(typhoon_stop_runtime(tp, WaitNoSleep) < 0) {
2175                 netdev_err(dev, "unable to stop runtime\n");
2176                 goto need_resume;
2177         }
2178
2179         typhoon_free_rx_rings(tp);
2180         typhoon_init_rings(tp);
2181
2182         if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) {
2183                 netdev_err(dev, "unable to boot sleep image\n");
2184                 goto need_resume;
2185         }
2186
2187         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAC_ADDRESS);
2188         xp_cmd.parm1 = cpu_to_le16(ntohs(*(__be16 *)&dev->dev_addr[0]));
2189         xp_cmd.parm2 = cpu_to_le32(ntohl(*(__be32 *)&dev->dev_addr[2]));
2190         if(typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL) < 0) {
2191                 netdev_err(dev, "unable to set mac address in suspend\n");
2192                 goto need_resume;
2193         }
2194
2195         INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_RX_FILTER);
2196         xp_cmd.parm1 = TYPHOON_RX_FILTER_DIRECTED | TYPHOON_RX_FILTER_BROADCAST;
2197         if(typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL) < 0) {
2198                 netdev_err(dev, "unable to set rx filter in suspend\n");
2199                 goto need_resume;
2200         }
2201
2202         if(typhoon_sleep(tp, pci_choose_state(pdev, state), tp->wol_events) < 0) {
2203                 netdev_err(dev, "unable to put card to sleep\n");
2204                 goto need_resume;
2205         }
2206
2207         return 0;
2208
2209 need_resume:
2210         typhoon_resume(pdev);
2211         return -EBUSY;
2212 }
2213 #endif
2214
2215 static int __devinit
2216 typhoon_test_mmio(struct pci_dev *pdev)
2217 {
2218         void __iomem *ioaddr = pci_iomap(pdev, 1, 128);
2219         int mode = 0;
2220         u32 val;
2221
2222         if(!ioaddr)
2223                 goto out;
2224
2225         if(ioread32(ioaddr + TYPHOON_REG_STATUS) !=
2226                                 TYPHOON_STATUS_WAITING_FOR_HOST)
2227                 goto out_unmap;
2228
2229         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
2230         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
2231         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_ENABLE);
2232
2233         /* Ok, see if we can change our interrupt status register by
2234          * sending ourselves an interrupt. If so, then MMIO works.
2235          * The 50usec delay is arbitrary -- it could probably be smaller.
2236          */
2237         val = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
2238         if((val & TYPHOON_INTR_SELF) == 0) {
2239                 iowrite32(1, ioaddr + TYPHOON_REG_SELF_INTERRUPT);
2240                 ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
2241                 udelay(50);
2242                 val = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
2243                 if(val & TYPHOON_INTR_SELF)
2244                         mode = 1;
2245         }
2246
2247         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
2248         iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
2249         iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_ENABLE);
2250         ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
2251
2252 out_unmap:
2253         pci_iounmap(pdev, ioaddr);
2254
2255 out:
2256         if(!mode)
2257                 pr_info("%s: falling back to port IO\n", pci_name(pdev));
2258         return mode;
2259 }
2260
2261 static const struct net_device_ops typhoon_netdev_ops = {
2262         .ndo_open               = typhoon_open,
2263         .ndo_stop               = typhoon_close,
2264         .ndo_start_xmit         = typhoon_start_tx,
2265         .ndo_set_rx_mode        = typhoon_set_rx_mode,
2266         .ndo_tx_timeout         = typhoon_tx_timeout,
2267         .ndo_get_stats          = typhoon_get_stats,
2268         .ndo_validate_addr      = eth_validate_addr,
2269         .ndo_set_mac_address    = typhoon_set_mac_address,
2270         .ndo_change_mtu         = eth_change_mtu,
2271 };
2272
2273 static int __devinit
2274 typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2275 {
2276         struct net_device *dev;
2277         struct typhoon *tp;
2278         int card_id = (int) ent->driver_data;
2279         void __iomem *ioaddr;
2280         void *shared;
2281         dma_addr_t shared_dma;
2282         struct cmd_desc xp_cmd;
2283         struct resp_desc xp_resp[3];
2284         int err = 0;
2285         const char *err_msg;
2286
2287         dev = alloc_etherdev(sizeof(*tp));
2288         if(dev == NULL) {
2289                 err_msg = "unable to alloc new net device";
2290                 err = -ENOMEM;
2291                 goto error_out;
2292         }
2293         SET_NETDEV_DEV(dev, &pdev->dev);
2294
2295         err = pci_enable_device(pdev);
2296         if(err < 0) {
2297                 err_msg = "unable to enable device";
2298                 goto error_out_dev;
2299         }
2300
2301         err = pci_set_mwi(pdev);
2302         if(err < 0) {
2303                 err_msg = "unable to set MWI";
2304                 goto error_out_disable;
2305         }
2306
2307         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2308         if(err < 0) {
2309                 err_msg = "No usable DMA configuration";
2310                 goto error_out_mwi;
2311         }
2312
2313         /* sanity checks on IO and MMIO BARs
2314          */
2315         if(!(pci_resource_flags(pdev, 0) & IORESOURCE_IO)) {
2316                 err_msg = "region #1 not a PCI IO resource, aborting";
2317                 err = -ENODEV;
2318                 goto error_out_mwi;
2319         }
2320         if(pci_resource_len(pdev, 0) < 128) {
2321                 err_msg = "Invalid PCI IO region size, aborting";
2322                 err = -ENODEV;
2323                 goto error_out_mwi;
2324         }
2325         if(!(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
2326                 err_msg = "region #1 not a PCI MMIO resource, aborting";
2327                 err = -ENODEV;
2328                 goto error_out_mwi;
2329         }
2330         if(pci_resource_len(pdev, 1) < 128) {
2331                 err_msg = "Invalid PCI MMIO region size, aborting";
2332                 err = -ENODEV;
2333                 goto error_out_mwi;
2334         }
2335
2336         err = pci_request_regions(pdev, KBUILD_MODNAME);
2337         if(err < 0) {
2338                 err_msg = "could not request regions";
2339                 goto error_out_mwi;
2340         }
2341
2342         /* map our registers
2343          */
2344         if(use_mmio != 0 && use_mmio != 1)
2345                 use_mmio = typhoon_test_mmio(pdev);
2346
2347         ioaddr = pci_iomap(pdev, use_mmio, 128);
2348         if (!ioaddr) {
2349                 err_msg = "cannot remap registers, aborting";
2350                 err = -EIO;
2351                 goto error_out_regions;
2352         }
2353
2354         /* allocate pci dma space for rx and tx descriptor rings
2355          */
2356         shared = pci_alloc_consistent(pdev, sizeof(struct typhoon_shared),
2357                                       &shared_dma);
2358         if(!shared) {
2359                 err_msg = "could not allocate DMA memory";
2360                 err = -ENOMEM;
2361                 goto error_out_remap;
2362         }
2363
2364         dev->irq = pdev->irq;
2365         tp = netdev_priv(dev);
2366         tp->shared = shared;
2367         tp->shared_dma = shared_dma;
2368         tp->pdev = pdev;
2369         tp->tx_pdev = pdev;
2370         tp->ioaddr = ioaddr;
2371         tp->tx_ioaddr = ioaddr;
2372         tp->dev = dev;
2373
2374         /* Init sequence:
2375          * 1) Reset the adapter to clear any bad juju
2376          * 2) Reload the sleep image
2377          * 3) Boot the sleep image
2378          * 4) Get the hardware address.
2379          * 5) Put the card to sleep.
2380          */
2381         if (typhoon_reset(ioaddr, WaitSleep) < 0) {
2382                 err_msg = "could not reset 3XP";
2383                 err = -EIO;
2384                 goto error_out_dma;
2385         }
2386
2387         /* Now that we've reset the 3XP and are sure it's not going to
2388          * write all over memory, enable bus mastering, and save our
2389          * state for resuming after a suspend.
2390          */
2391         pci_set_master(pdev);
2392         pci_save_state(pdev);
2393
2394         typhoon_init_interface(tp);
2395         typhoon_init_rings(tp);
2396
2397         if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) {
2398                 err_msg = "cannot boot 3XP sleep image";
2399                 err = -EIO;
2400                 goto error_out_reset;
2401         }
2402
2403         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_MAC_ADDRESS);
2404         if(typhoon_issue_command(tp, 1, &xp_cmd, 1, xp_resp) < 0) {
2405                 err_msg = "cannot read MAC address";
2406                 err = -EIO;
2407                 goto error_out_reset;
2408         }
2409
2410         *(__be16 *)&dev->dev_addr[0] = htons(le16_to_cpu(xp_resp[0].parm1));
2411         *(__be32 *)&dev->dev_addr[2] = htonl(le32_to_cpu(xp_resp[0].parm2));
2412
2413         if(!is_valid_ether_addr(dev->dev_addr)) {
2414                 err_msg = "Could not obtain valid ethernet address, aborting";
2415                 goto error_out_reset;
2416         }
2417
2418         /* Read the Sleep Image version last, so the response is valid
2419          * later when we print out the version reported.
2420          */
2421         INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS);
2422         if(typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp) < 0) {
2423                 err_msg = "Could not get Sleep Image version";
2424                 goto error_out_reset;
2425         }
2426
2427         tp->capabilities = typhoon_card_info[card_id].capabilities;
2428         tp->xcvr_select = TYPHOON_XCVR_AUTONEG;
2429
2430         /* Typhoon 1.0 Sleep Images return one response descriptor to the
2431          * READ_VERSIONS command. Those versions are OK after waking up
2432          * from sleep without needing a reset. Typhoon 1.1+ Sleep Images
2433          * seem to need a little extra help to get started. Since we don't
2434          * know how to nudge it along, just kick it.
2435          */
2436         if(xp_resp[0].numDesc != 0)
2437                 tp->capabilities |= TYPHOON_WAKEUP_NEEDS_RESET;
2438
2439         if(typhoon_sleep(tp, PCI_D3hot, 0) < 0) {
2440                 err_msg = "cannot put adapter to sleep";
2441                 err = -EIO;
2442                 goto error_out_reset;
2443         }
2444
2445         /* The chip-specific entries in the device structure. */
2446         dev->netdev_ops         = &typhoon_netdev_ops;
2447         netif_napi_add(dev, &tp->napi, typhoon_poll, 16);
2448         dev->watchdog_timeo     = TX_TIMEOUT;
2449
2450         SET_ETHTOOL_OPS(dev, &typhoon_ethtool_ops);
2451
2452         /* We can handle scatter gather, up to 16 entries, and
2453          * we can do IP checksumming (only version 4, doh...)
2454          *
2455          * There's no way to turn off the RX VLAN offloading and stripping
2456          * on the current 3XP firmware -- it does not respect the offload
2457          * settings -- so we only allow the user to toggle the TX processing.
2458          */
2459         dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
2460                 NETIF_F_HW_VLAN_TX;
2461         dev->features = dev->hw_features |
2462                 NETIF_F_HW_VLAN_RX | NETIF_F_RXCSUM;
2463
2464         if(register_netdev(dev) < 0) {
2465                 err_msg = "unable to register netdev";
2466                 goto error_out_reset;
2467         }
2468
2469         pci_set_drvdata(pdev, dev);
2470
2471         netdev_info(dev, "%s at %s 0x%llx, %pM\n",
2472                     typhoon_card_info[card_id].name,
2473                     use_mmio ? "MMIO" : "IO",
2474                     (unsigned long long)pci_resource_start(pdev, use_mmio),
2475                     dev->dev_addr);
2476
2477         /* xp_resp still contains the response to the READ_VERSIONS command.
2478          * For debugging, let the user know what version he has.
2479          */
2480         if(xp_resp[0].numDesc == 0) {
2481                 /* This is the Typhoon 1.0 type Sleep Image, last 16 bits
2482                  * of version is Month/Day of build.
2483                  */
2484                 u16 monthday = le32_to_cpu(xp_resp[0].parm2) & 0xffff;
2485                 netdev_info(dev, "Typhoon 1.0 Sleep Image built %02u/%02u/2000\n",
2486                             monthday >> 8, monthday & 0xff);
2487         } else if(xp_resp[0].numDesc == 2) {
2488                 /* This is the Typhoon 1.1+ type Sleep Image
2489                  */
2490                 u32 sleep_ver = le32_to_cpu(xp_resp[0].parm2);
2491                 u8 *ver_string = (u8 *) &xp_resp[1];
2492                 ver_string[25] = 0;
2493                 netdev_info(dev, "Typhoon 1.1+ Sleep Image version %02x.%03x.%03x %s\n",
2494                             sleep_ver >> 24, (sleep_ver >> 12) & 0xfff,
2495                             sleep_ver & 0xfff, ver_string);
2496         } else {
2497                 netdev_warn(dev, "Unknown Sleep Image version (%u:%04x)\n",
2498                             xp_resp[0].numDesc, le32_to_cpu(xp_resp[0].parm2));
2499         }
2500
2501         return 0;
2502
2503 error_out_reset:
2504         typhoon_reset(ioaddr, NoWait);
2505
2506 error_out_dma:
2507         pci_free_consistent(pdev, sizeof(struct typhoon_shared),
2508                             shared, shared_dma);
2509 error_out_remap:
2510         pci_iounmap(pdev, ioaddr);
2511 error_out_regions:
2512         pci_release_regions(pdev);
2513 error_out_mwi:
2514         pci_clear_mwi(pdev);
2515 error_out_disable:
2516         pci_disable_device(pdev);
2517 error_out_dev:
2518         free_netdev(dev);
2519 error_out:
2520         pr_err("%s: %s\n", pci_name(pdev), err_msg);
2521         return err;
2522 }
2523
2524 static void __devexit
2525 typhoon_remove_one(struct pci_dev *pdev)
2526 {
2527         struct net_device *dev = pci_get_drvdata(pdev);
2528         struct typhoon *tp = netdev_priv(dev);
2529
2530         unregister_netdev(dev);
2531         pci_set_power_state(pdev, PCI_D0);
2532         pci_restore_state(pdev);
2533         typhoon_reset(tp->ioaddr, NoWait);
2534         pci_iounmap(pdev, tp->ioaddr);
2535         pci_free_consistent(pdev, sizeof(struct typhoon_shared),
2536                             tp->shared, tp->shared_dma);
2537         pci_release_regions(pdev);
2538         pci_clear_mwi(pdev);
2539         pci_disable_device(pdev);
2540         pci_set_drvdata(pdev, NULL);
2541         free_netdev(dev);
2542 }
2543
2544 static struct pci_driver typhoon_driver = {
2545         .name           = KBUILD_MODNAME,
2546         .id_table       = typhoon_pci_tbl,
2547         .probe          = typhoon_init_one,
2548         .remove         = __devexit_p(typhoon_remove_one),
2549 #ifdef CONFIG_PM
2550         .suspend        = typhoon_suspend,
2551         .resume         = typhoon_resume,
2552 #endif
2553 };
2554
2555 static int __init
2556 typhoon_init(void)
2557 {
2558         return pci_register_driver(&typhoon_driver);
2559 }
2560
2561 static void __exit
2562 typhoon_cleanup(void)
2563 {
2564         if (typhoon_fw)
2565                 release_firmware(typhoon_fw);
2566         pci_unregister_driver(&typhoon_driver);
2567 }
2568
2569 module_init(typhoon_init);
2570 module_exit(typhoon_cleanup);