drivers/net/atlx/atl1.c

   1 /*
   2  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   3  * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
   4  * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
   5  *
   6  * Derived from Intel e1000 driver
   7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program; if not, write to the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  * The full GNU General Public License is included in this distribution in the
  24  * file called COPYING.
  25  *
  26  * Contact Information:
  27  * Xiong Huang <xiong_huang@attansic.com>
  28  * Attansic Technology Corp. 3F 147, Xianzheng 9th Road, Zhubei,
  29  * Xinzhu  302, TAIWAN, REPUBLIC OF CHINA
  30  *
  31  * Chris Snook <csnook@redhat.com>
  32  * Jay Cliburn <jcliburn@gmail.com>
  33  *
  34  * This version is adapted from the Attansic reference driver for
  35  * inclusion in the Linux kernel.  It is currently under heavy development.
  36  * A very incomplete list of things that need to be dealt with:
  37  *
  38  * TODO:
  39  * Add more ethtool functions.
  40  * Fix abstruse irq enable/disable condition described here:
  41  *      http://marc.theaimsgroup.com/?l=linux-netdev&m=116398508500553&w=2
  42  *
  43  * NEEDS TESTING:
  44  * VLAN
  45  * multicast
  46  * promiscuous mode
  47  * interrupt coalescing
  48  * SMP torture testing
  49  */
  50
  51 #include <asm/atomic.h>
  52 #include <asm/byteorder.h>
  53
  54 #include <linux/compiler.h>
  55 #include <linux/crc32.h>
  56 #include <linux/delay.h>
  57 #include <linux/dma-mapping.h>
  58 #include <linux/etherdevice.h>
  59 #include <linux/hardirq.h>
  60 #include <linux/if_ether.h>
  61 #include <linux/if_vlan.h>
  62 #include <linux/in.h>
  63 #include <linux/interrupt.h>
  64 #include <linux/ip.h>
  65 #include <linux/irqflags.h>
  66 #include <linux/irqreturn.h>
  67 #include <linux/jiffies.h>
  68 #include <linux/mii.h>
  69 #include <linux/module.h>
  70 #include <linux/moduleparam.h>
  71 #include <linux/net.h>
  72 #include <linux/netdevice.h>
  73 #include <linux/pci.h>
  74 #include <linux/pci_ids.h>
  75 #include <linux/pm.h>
  76 #include <linux/skbuff.h>
  77 #include <linux/slab.h>
  78 #include <linux/spinlock.h>
  79 #include <linux/string.h>
  80 #include <linux/tcp.h>
  81 #include <linux/timer.h>
  82 #include <linux/types.h>
  83 #include <linux/workqueue.h>
  84
  85 #include <net/checksum.h>
  86
  87 #include "atl1.h"
  88
  89 /* Temporary hack for merging atl1 and atl2 */
  90 #include "atlx.c"
  91
  92 /*
  93  * This is the only thing that needs to be changed to adjust the
  94  * maximum number of ports that the driver can manage.
  95  */
  96 #define ATL1_MAX_NIC 4
  97
  98 #define OPTION_UNSET    -1
  99 #define OPTION_DISABLED 0
 100 #define OPTION_ENABLED  1
 101
 102 #define ATL1_PARAM_INIT { [0 ... ATL1_MAX_NIC] = OPTION_UNSET }
 103
 104 /*
 105  * Interrupt Moderate Timer in units of 2 us
 106  *
 107  * Valid Range: 10-65535
 108  *
 109  * Default Value: 100 (200us)
 110  */
 111 static int __devinitdata int_mod_timer[ATL1_MAX_NIC+1] = ATL1_PARAM_INIT;
 112 static int num_int_mod_timer;
 113 module_param_array_named(int_mod_timer, int_mod_timer, int,
 114         &num_int_mod_timer, 0);
 115 MODULE_PARM_DESC(int_mod_timer, "Interrupt moderator timer");
 116
 117 #define DEFAULT_INT_MOD_CNT     100     /* 200us */
 118 #define MAX_INT_MOD_CNT         65000
 119 #define MIN_INT_MOD_CNT         50
 120
 121 struct atl1_option {
 122         enum { enable_option, range_option, list_option } type;
 123         char *name;
 124         char *err;
 125         int def;
 126         union {
 127                 struct {        /* range_option info */
 128                         int min;
 129                         int max;
 130                 } r;
 131                 struct {        /* list_option info */
 132                         int nr;
 133                         struct atl1_opt_list {
 134                                 int i;
 135                                 char *str;
 136                         } *p;
 137                 } l;
 138         } arg;
 139 };
 140
 141 static int __devinit atl1_validate_option(int *value, struct atl1_option *opt,
 142         struct pci_dev *pdev)
 143 {
 144         if (*value == OPTION_UNSET) {
 145                 *value = opt->def;
 146                 return 0;
 147         }
 148
 149         switch (opt->type) {
 150         case enable_option:
 151                 switch (*value) {
 152                 case OPTION_ENABLED:
 153                         dev_info(&pdev->dev, "%s enabled\n", opt->name);
 154                         return 0;
 155                 case OPTION_DISABLED:
 156                         dev_info(&pdev->dev, "%s disabled\n", opt->name);
 157                         return 0;
 158                 }
 159                 break;
 160         case range_option:
 161                 if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
 162                         dev_info(&pdev->dev, "%s set to %i\n", opt->name,
 163                                 *value);
 164                         return 0;
 165                 }
 166                 break;
 167         case list_option:{
 168                         int i;
 169                         struct atl1_opt_list *ent;
 170
 171                         for (i = 0; i < opt->arg.l.nr; i++) {
 172                                 ent = &opt->arg.l.p[i];
 173                                 if (*value == ent->i) {
 174                                         if (ent->str[0] != '\0')
 175                                                 dev_info(&pdev->dev, "%s\n",
 176                                                         ent->str);
 177                                         return 0;
 178                                 }
 179                         }
 180                 }
 181                 break;
 182
 183         default:
 184                 break;
 185         }
 186
 187         dev_info(&pdev->dev, "invalid %s specified (%i) %s\n",
 188                 opt->name, *value, opt->err);
 189         *value = opt->def;
 190         return -1;
 191 }
 192
 193 /*
 194  * atl1_check_options - Range Checking for Command Line Parameters
 195  * @adapter: board private structure
 196  *
 197  * This routine checks all command line parameters for valid user
 198  * input.  If an invalid value is given, or if no user specified
 199  * value exists, a default value is used.  The final value is stored
 200  * in a variable in the adapter structure.
 201  */
 202 void __devinit atl1_check_options(struct atl1_adapter *adapter)
 203 {
 204         struct pci_dev *pdev = adapter->pdev;
 205         int bd = adapter->bd_number;
 206         if (bd >= ATL1_MAX_NIC) {
 207                 dev_notice(&pdev->dev, "no configuration for board#%i\n", bd);
 208                 dev_notice(&pdev->dev, "using defaults for all values\n");
 209         }
 210         {                       /* Interrupt Moderate Timer */
 211                 struct atl1_option opt = {
 212                         .type = range_option,
 213                         .name = "Interrupt Moderator Timer",
 214                         .err = "using default of "
 215                                 __MODULE_STRING(DEFAULT_INT_MOD_CNT),
 216                         .def = DEFAULT_INT_MOD_CNT,
 217                         .arg = {.r = {.min = MIN_INT_MOD_CNT,
 218                                         .max = MAX_INT_MOD_CNT} }
 219                 };
 220                 int val;
 221                 if (num_int_mod_timer > bd) {
 222                         val = int_mod_timer[bd];
 223                         atl1_validate_option(&val, &opt, pdev);
 224                         adapter->imt = (u16) val;
 225                 } else
 226                         adapter->imt = (u16) (opt.def);
 227         }
 228 }
 229
 230 /*
 231  * atl1_pci_tbl - PCI Device ID Table
 232  */
 233 static const struct pci_device_id atl1_pci_tbl[] = {
 234         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
 235         /* required last entry */
 236         {0,}
 237 };
 238 MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);
 239
 240 static const u32 atl1_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
 241         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
 242
 243 static int debug = -1;
 244 module_param(debug, int, 0);
 245 MODULE_PARM_DESC(debug, "Message level (0=none,...,16=all)");
 246
 247 /*
 248  * Reset the transmit and receive units; mask and clear all interrupts.
 249  * hw - Struct containing variables accessed by shared code
 250  * return : 0  or  idle status (if error)
 251  */
 252 static s32 atl1_reset_hw(struct atl1_hw *hw)
 253 {
 254         struct pci_dev *pdev = hw->back->pdev;
 255         struct atl1_adapter *adapter = hw->back;
 256         u32 icr;
 257         int i;
 258
 259         /*
 260          * Clear Interrupt mask to stop board from generating
 261          * interrupts & Clear any pending interrupt events
 262          */
 263         /*
 264          * iowrite32(0, hw->hw_addr + REG_IMR);
 265          * iowrite32(0xffffffff, hw->hw_addr + REG_ISR);
 266          */
 267
 268         /*
 269          * Issue Soft Reset to the MAC.  This will reset the chip's
 270          * transmit, receive, DMA.  It will not effect
 271          * the current PCI configuration.  The global reset bit is self-
 272          * clearing, and should clear within a microsecond.
 273          */
 274         iowrite32(MASTER_CTRL_SOFT_RST, hw->hw_addr + REG_MASTER_CTRL);
 275         ioread32(hw->hw_addr + REG_MASTER_CTRL);
 276
 277         iowrite16(1, hw->hw_addr + REG_PHY_ENABLE);
 278         ioread16(hw->hw_addr + REG_PHY_ENABLE);
 279
 280         /* delay about 1ms */
 281         msleep(1);
 282
 283         /* Wait at least 10ms for All module to be Idle */
 284         for (i = 0; i < 10; i++) {
 285                 icr = ioread32(hw->hw_addr + REG_IDLE_STATUS);
 286                 if (!icr)
 287                         break;
 288                 /* delay 1 ms */
 289                 msleep(1);
 290                 /* FIXME: still the right way to do this? */
 291                 cpu_relax();
 292         }
 293
 294         if (icr) {
 295                 if (netif_msg_hw(adapter))
 296                         dev_dbg(&pdev->dev, "ICR = 0x%x\n", icr);
 297                 return icr;
 298         }
 299
 300         return 0;
 301 }
 302
 303 /* function about EEPROM
 304  *
 305  * check_eeprom_exist
 306  * return 0 if eeprom exist
 307  */
 308 static int atl1_check_eeprom_exist(struct atl1_hw *hw)
 309 {
 310         u32 value;
 311         value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
 312         if (value & SPI_FLASH_CTRL_EN_VPD) {
 313                 value &= ~SPI_FLASH_CTRL_EN_VPD;
 314                 iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
 315         }
 316
 317         value = ioread16(hw->hw_addr + REG_PCIE_CAP_LIST);
 318         return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
 319 }
 320
 321 static bool atl1_read_eeprom(struct atl1_hw *hw, u32 offset, u32 *p_value)
 322 {
 323         int i;
 324         u32 control;
 325
 326         if (offset & 3)
 327                 /* address do not align */
 328                 return false;
 329
 330         iowrite32(0, hw->hw_addr + REG_VPD_DATA);
 331         control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
 332         iowrite32(control, hw->hw_addr + REG_VPD_CAP);
 333         ioread32(hw->hw_addr + REG_VPD_CAP);
 334
 335         for (i = 0; i < 10; i++) {
 336                 msleep(2);
 337                 control = ioread32(hw->hw_addr + REG_VPD_CAP);
 338                 if (control & VPD_CAP_VPD_FLAG)
 339                         break;
 340         }
 341         if (control & VPD_CAP_VPD_FLAG) {
 342                 *p_value = ioread32(hw->hw_addr + REG_VPD_DATA);
 343                 return true;
 344         }
 345         /* timeout */
 346         return false;
 347 }
 348
 349 /*
 350  * Reads the value from a PHY register
 351  * hw - Struct containing variables accessed by shared code
 352  * reg_addr - address of the PHY register to read
 353  */
 354 s32 atl1_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data)
 355 {
 356         u32 val;
 357         int i;
 358
 359         val = ((u32) (reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
 360                 MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW | MDIO_CLK_25_4 <<
 361                 MDIO_CLK_SEL_SHIFT;
 362         iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
 363         ioread32(hw->hw_addr + REG_MDIO_CTRL);
 364
 365         for (i = 0; i < MDIO_WAIT_TIMES; i++) {
 366                 udelay(2);
 367                 val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
 368                 if (!(val & (MDIO_START | MDIO_BUSY)))
 369                         break;
 370         }
 371         if (!(val & (MDIO_START | MDIO_BUSY))) {
 372                 *phy_data = (u16) val;
 373                 return 0;
 374         }
 375         return ATLX_ERR_PHY;
 376 }
 377
 378 #define CUSTOM_SPI_CS_SETUP     2
 379 #define CUSTOM_SPI_CLK_HI       2
 380 #define CUSTOM_SPI_CLK_LO       2
 381 #define CUSTOM_SPI_CS_HOLD      2
 382 #define CUSTOM_SPI_CS_HI        3
 383
 384 static bool atl1_spi_read(struct atl1_hw *hw, u32 addr, u32 *buf)
 385 {
 386         int i;
 387         u32 value;
 388
 389         iowrite32(0, hw->hw_addr + REG_SPI_DATA);
 390         iowrite32(addr, hw->hw_addr + REG_SPI_ADDR);
 391
 392         value = SPI_FLASH_CTRL_WAIT_READY |
 393             (CUSTOM_SPI_CS_SETUP & SPI_FLASH_CTRL_CS_SETUP_MASK) <<
 394             SPI_FLASH_CTRL_CS_SETUP_SHIFT | (CUSTOM_SPI_CLK_HI &
 395                                              SPI_FLASH_CTRL_CLK_HI_MASK) <<
 396             SPI_FLASH_CTRL_CLK_HI_SHIFT | (CUSTOM_SPI_CLK_LO &
 397                                            SPI_FLASH_CTRL_CLK_LO_MASK) <<
 398             SPI_FLASH_CTRL_CLK_LO_SHIFT | (CUSTOM_SPI_CS_HOLD &
 399                                            SPI_FLASH_CTRL_CS_HOLD_MASK) <<
 400             SPI_FLASH_CTRL_CS_HOLD_SHIFT | (CUSTOM_SPI_CS_HI &
 401                                             SPI_FLASH_CTRL_CS_HI_MASK) <<
 402             SPI_FLASH_CTRL_CS_HI_SHIFT | (1 & SPI_FLASH_CTRL_INS_MASK) <<
 403             SPI_FLASH_CTRL_INS_SHIFT;
 404
 405         iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
 406
 407         value |= SPI_FLASH_CTRL_START;
 408         iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
 409         ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
 410
 411         for (i = 0; i < 10; i++) {
 412                 msleep(1);
 413                 value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
 414                 if (!(value & SPI_FLASH_CTRL_START))
 415                         break;
 416         }
 417
 418         if (value & SPI_FLASH_CTRL_START)
 419                 return false;
 420
 421         *buf = ioread32(hw->hw_addr + REG_SPI_DATA);
 422
 423         return true;
 424 }
 425
 426 /*
 427  * get_permanent_address
 428  * return 0 if get valid mac address,
 429  */
 430 static int atl1_get_permanent_address(struct atl1_hw *hw)
 431 {
 432         u32 addr[2];
 433         u32 i, control;
 434         u16 reg;
 435         u8 eth_addr[ETH_ALEN];
 436         bool key_valid;
 437
 438         if (is_valid_ether_addr(hw->perm_mac_addr))
 439                 return 0;
 440
 441         /* init */
 442         addr[0] = addr[1] = 0;
 443
 444         if (!atl1_check_eeprom_exist(hw)) {
 445                 reg = 0;
 446                 key_valid = false;
 447                 /* Read out all EEPROM content */
 448                 i = 0;
 449                 while (1) {
 450                         if (atl1_read_eeprom(hw, i + 0x100, &control)) {
 451                                 if (key_valid) {
 452                                         if (reg == REG_MAC_STA_ADDR)
 453                                                 addr[0] = control;
 454                                         else if (reg == (REG_MAC_STA_ADDR + 4))
 455                                                 addr[1] = control;
 456                                         key_valid = false;
 457                                 } else if ((control & 0xff) == 0x5A) {
 458                                         key_valid = true;
 459                                         reg = (u16) (control >> 16);
 460                                 } else
 461                                         break;
 462                         } else
 463                                 /* read error */
 464                                 break;
 465                         i += 4;
 466                 }
 467
 468                 *(u32 *) &eth_addr[2] = swab32(addr[0]);
 469                 *(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
 470                 if (is_valid_ether_addr(eth_addr)) {
 471                         memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
 472                         return 0;
 473                 }
 474         }
 475
 476         /* see if SPI FLAGS exist ? */
 477         addr[0] = addr[1] = 0;
 478         reg = 0;
 479         key_valid = false;
 480         i = 0;
 481         while (1) {
 482                 if (atl1_spi_read(hw, i + 0x1f000, &control)) {
 483                         if (key_valid) {
 484                                 if (reg == REG_MAC_STA_ADDR)
 485                                         addr[0] = control;
 486                                 else if (reg == (REG_MAC_STA_ADDR + 4))
 487                                         addr[1] = control;
 488                                 key_valid = false;
 489                         } else if ((control & 0xff) == 0x5A) {
 490                                 key_valid = true;
 491                                 reg = (u16) (control >> 16);
 492                         } else
 493                                 /* data end */
 494                                 break;
 495                 } else
 496                         /* read error */
 497                         break;
 498                 i += 4;
 499         }
 500
 501         *(u32 *) &eth_addr[2] = swab32(addr[0]);
 502         *(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
 503         if (is_valid_ether_addr(eth_addr)) {
 504                 memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
 505                 return 0;
 506         }
 507
 508         /*
 509          * On some motherboards, the MAC address is written by the
 510          * BIOS directly to the MAC register during POST, and is
 511          * not stored in eeprom.  If all else thus far has failed
 512          * to fetch the permanent MAC address, try reading it directly.
 513          */
 514         addr[0] = ioread32(hw->hw_addr + REG_MAC_STA_ADDR);
 515         addr[1] = ioread16(hw->hw_addr + (REG_MAC_STA_ADDR + 4));
 516         *(u32 *) &eth_addr[2] = swab32(addr[0]);
 517         *(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
 518         if (is_valid_ether_addr(eth_addr)) {
 519                 memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
 520                 return 0;
 521         }
 522
 523         return 1;
 524 }
 525
 526 /*
 527  * Reads the adapter's MAC address from the EEPROM
 528  * hw - Struct containing variables accessed by shared code
 529  */
 530 s32 atl1_read_mac_addr(struct atl1_hw *hw)
 531 {
 532         u16 i;
 533
 534         if (atl1_get_permanent_address(hw))
 535                 random_ether_addr(hw->perm_mac_addr);
 536
 537         for (i = 0; i < ETH_ALEN; i++)
 538                 hw->mac_addr[i] = hw->perm_mac_addr[i];
 539         return 0;
 540 }
 541
 542 /*
 543  * Hashes an address to determine its location in the multicast table
 544  * hw - Struct containing variables accessed by shared code
 545  * mc_addr - the multicast address to hash
 546  *
 547  * atl1_hash_mc_addr
 548  *  purpose
 549  *      set hash value for a multicast address
 550  *      hash calcu processing :
 551  *          1. calcu 32bit CRC for multicast address
 552  *          2. reverse crc with MSB to LSB
 553  */
 554 u32 atl1_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr)
 555 {
 556         u32 crc32, value = 0;
 557         int i;
 558
 559         crc32 = ether_crc_le(6, mc_addr);
 560         for (i = 0; i < 32; i++)
 561                 value |= (((crc32 >> i) & 1) << (31 - i));
 562
 563         return value;
 564 }
 565
 566 /*
 567  * Sets the bit in the multicast table corresponding to the hash value.
 568  * hw - Struct containing variables accessed by shared code
 569  * hash_value - Multicast address hash value
 570  */
 571 void atl1_hash_set(struct atl1_hw *hw, u32 hash_value)
 572 {
 573         u32 hash_bit, hash_reg;
 574         u32 mta;
 575
 576         /*
 577          * The HASH Table  is a register array of 2 32-bit registers.
 578          * It is treated like an array of 64 bits.  We want to set
 579          * bit BitArray[hash_value]. So we figure out what register
 580          * the bit is in, read it, OR in the new bit, then write
 581          * back the new value.  The register is determined by the
 582          * upper 7 bits of the hash value and the bit within that
 583          * register are determined by the lower 5 bits of the value.
 584          */
 585         hash_reg = (hash_value >> 31) & 0x1;
 586         hash_bit = (hash_value >> 26) & 0x1F;
 587         mta = ioread32((hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
 588         mta |= (1 << hash_bit);
 589         iowrite32(mta, (hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
 590 }
 591
 592 /*
 593  * Writes a value to a PHY register
 594  * hw - Struct containing variables accessed by shared code
 595  * reg_addr - address of the PHY register to write
 596  * data - data to write to the PHY
 597  */
 598 static s32 atl1_write_phy_reg(struct atl1_hw *hw, u32 reg_addr, u16 phy_data)
 599 {
 600         int i;
 601         u32 val;
 602
 603         val = ((u32) (phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
 604             (reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
 605             MDIO_SUP_PREAMBLE |
 606             MDIO_START | MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
 607         iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
 608         ioread32(hw->hw_addr + REG_MDIO_CTRL);
 609
 610         for (i = 0; i < MDIO_WAIT_TIMES; i++) {
 611                 udelay(2);
 612                 val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
 613                 if (!(val & (MDIO_START | MDIO_BUSY)))
 614                         break;
 615         }
 616
 617         if (!(val & (MDIO_START | MDIO_BUSY)))
 618                 return 0;
 619
 620         return ATLX_ERR_PHY;
 621 }
 622
 623 /*
 624  * Make L001's PHY out of Power Saving State (bug)
 625  * hw - Struct containing variables accessed by shared code
 626  * when power on, L001's PHY always on Power saving State
 627  * (Gigabit Link forbidden)
 628  */
 629 static s32 atl1_phy_leave_power_saving(struct atl1_hw *hw)
 630 {
 631         s32 ret;
 632         ret = atl1_write_phy_reg(hw, 29, 0x0029);
 633         if (ret)
 634                 return ret;
 635         return atl1_write_phy_reg(hw, 30, 0);
 636 }
 637
 638 /*
 639  * Resets the PHY and make all config validate
 640  * hw - Struct containing variables accessed by shared code
 641  *
 642  * Sets bit 15 and 12 of the MII Control regiser (for F001 bug)
 643  */
 644 static s32 atl1_phy_reset(struct atl1_hw *hw)
 645 {
 646         struct pci_dev *pdev = hw->back->pdev;
 647         struct atl1_adapter *adapter = hw->back;
 648         s32 ret_val;
 649         u16 phy_data;
 650
 651         if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
 652             hw->media_type == MEDIA_TYPE_1000M_FULL)
 653                 phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
 654         else {
 655                 switch (hw->media_type) {
 656                 case MEDIA_TYPE_100M_FULL:
 657                         phy_data =
 658                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
 659                             MII_CR_RESET;
 660                         break;
 661                 case MEDIA_TYPE_100M_HALF:
 662                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
 663                         break;
 664                 case MEDIA_TYPE_10M_FULL:
 665                         phy_data =
 666                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
 667                         break;
 668                 default:
 669                         /* MEDIA_TYPE_10M_HALF: */
 670                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
 671                         break;
 672                 }
 673         }
 674
 675         ret_val = atl1_write_phy_reg(hw, MII_BMCR, phy_data);
 676         if (ret_val) {
 677                 u32 val;
 678                 int i;
 679                 /* pcie serdes link may be down! */
 680                 if (netif_msg_hw(adapter))
 681                         dev_dbg(&pdev->dev, "pcie phy link down\n");
 682
 683                 for (i = 0; i < 25; i++) {
 684                         msleep(1);
 685                         val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
 686                         if (!(val & (MDIO_START | MDIO_BUSY)))
 687                                 break;
 688                 }
 689
 690                 if ((val & (MDIO_START | MDIO_BUSY)) != 0) {
 691                         if (netif_msg_hw(adapter))
 692                                 dev_warn(&pdev->dev,
 693                                         "pcie link down at least 25ms\n");
 694                         return ret_val;
 695                 }
 696         }
 697         return 0;
 698 }
 699
 700 /*
 701  * Configures PHY autoneg and flow control advertisement settings
 702  * hw - Struct containing variables accessed by shared code
 703  */
 704 static s32 atl1_phy_setup_autoneg_adv(struct atl1_hw *hw)
 705 {
 706         s32 ret_val;
 707         s16 mii_autoneg_adv_reg;
 708         s16 mii_1000t_ctrl_reg;
 709
 710         /* Read the MII Auto-Neg Advertisement Register (Address 4). */
 711         mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
 712
 713         /* Read the MII 1000Base-T Control Register (Address 9). */
 714         mii_1000t_ctrl_reg = MII_ATLX_CR_1000T_DEFAULT_CAP_MASK;
 715
 716         /*
 717          * First we clear all the 10/100 mb speed bits in the Auto-Neg
 718          * Advertisement Register (Address 4) and the 1000 mb speed bits in
 719          * the  1000Base-T Control Register (Address 9).
 720          */
 721         mii_autoneg_adv_reg &= ~MII_AR_SPEED_MASK;
 722         mii_1000t_ctrl_reg &= ~MII_ATLX_CR_1000T_SPEED_MASK;
 723
 724         /*
 725          * Need to parse media_type  and set up
 726          * the appropriate PHY registers.
 727          */
 728         switch (hw->media_type) {
 729         case MEDIA_TYPE_AUTO_SENSOR:
 730                 mii_autoneg_adv_reg |= (MII_AR_10T_HD_CAPS |
 731                                         MII_AR_10T_FD_CAPS |
 732                                         MII_AR_100TX_HD_CAPS |
 733                                         MII_AR_100TX_FD_CAPS);
 734                 mii_1000t_ctrl_reg |= MII_ATLX_CR_1000T_FD_CAPS;
 735                 break;
 736
 737         case MEDIA_TYPE_1000M_FULL:
 738                 mii_1000t_ctrl_reg |= MII_ATLX_CR_1000T_FD_CAPS;
 739                 break;
 740
 741         case MEDIA_TYPE_100M_FULL:
 742                 mii_autoneg_adv_reg |= MII_AR_100TX_FD_CAPS;
 743                 break;
 744
 745         case MEDIA_TYPE_100M_HALF:
 746                 mii_autoneg_adv_reg |= MII_AR_100TX_HD_CAPS;
 747                 break;
 748
 749         case MEDIA_TYPE_10M_FULL:
 750                 mii_autoneg_adv_reg |= MII_AR_10T_FD_CAPS;
 751                 break;
 752
 753         default:
 754                 mii_autoneg_adv_reg |= MII_AR_10T_HD_CAPS;
 755                 break;
 756         }
 757
 758         /* flow control fixed to enable all */
 759         mii_autoneg_adv_reg |= (MII_AR_ASM_DIR | MII_AR_PAUSE);
 760
 761         hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
 762         hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;
 763
 764         ret_val = atl1_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
 765         if (ret_val)
 766                 return ret_val;
 767
 768         ret_val = atl1_write_phy_reg(hw, MII_ATLX_CR, mii_1000t_ctrl_reg);
 769         if (ret_val)
 770                 return ret_val;
 771
 772         return 0;
 773 }
 774
 775 /*
 776  * Configures link settings.
 777  * hw - Struct containing variables accessed by shared code
 778  * Assumes the hardware has previously been reset and the
 779  * transmitter and receiver are not enabled.
 780  */
 781 static s32 atl1_setup_link(struct atl1_hw *hw)
 782 {
 783         struct pci_dev *pdev = hw->back->pdev;
 784         struct atl1_adapter *adapter = hw->back;
 785         s32 ret_val;
 786
 787         /*
 788          * Options:
 789          *  PHY will advertise value(s) parsed from
 790          *  autoneg_advertised and fc
 791          *  no matter what autoneg is , We will not wait link result.
 792          */
 793         ret_val = atl1_phy_setup_autoneg_adv(hw);
 794         if (ret_val) {
 795                 if (netif_msg_link(adapter))
 796                         dev_dbg(&pdev->dev,
 797                                 "error setting up autonegotiation\n");
 798                 return ret_val;
 799         }
 800         /* SW.Reset , En-Auto-Neg if needed */
 801         ret_val = atl1_phy_reset(hw);
 802         if (ret_val) {
 803                 if (netif_msg_link(adapter))
 804                         dev_dbg(&pdev->dev, "error resetting phy\n");
 805                 return ret_val;
 806         }
 807         hw->phy_configured = true;
 808         return ret_val;
 809 }
 810
 811 static void atl1_init_flash_opcode(struct atl1_hw *hw)
 812 {
 813         if (hw->flash_vendor >= ARRAY_SIZE(flash_table))
 814                 /* Atmel */
 815                 hw->flash_vendor = 0;
 816
 817         /* Init OP table */
 818         iowrite8(flash_table[hw->flash_vendor].cmd_program,
 819                 hw->hw_addr + REG_SPI_FLASH_OP_PROGRAM);
 820         iowrite8(flash_table[hw->flash_vendor].cmd_sector_erase,
 821                 hw->hw_addr + REG_SPI_FLASH_OP_SC_ERASE);
 822         iowrite8(flash_table[hw->flash_vendor].cmd_chip_erase,
 823                 hw->hw_addr + REG_SPI_FLASH_OP_CHIP_ERASE);
 824         iowrite8(flash_table[hw->flash_vendor].cmd_rdid,
 825                 hw->hw_addr + REG_SPI_FLASH_OP_RDID);
 826         iowrite8(flash_table[hw->flash_vendor].cmd_wren,
 827                 hw->hw_addr + REG_SPI_FLASH_OP_WREN);
 828         iowrite8(flash_table[hw->flash_vendor].cmd_rdsr,
 829                 hw->hw_addr + REG_SPI_FLASH_OP_RDSR);
 830         iowrite8(flash_table[hw->flash_vendor].cmd_wrsr,
 831                 hw->hw_addr + REG_SPI_FLASH_OP_WRSR);
 832         iowrite8(flash_table[hw->flash_vendor].cmd_read,
 833                 hw->hw_addr + REG_SPI_FLASH_OP_READ);
 834 }
 835
 836 /*
 837  * Performs basic configuration of the adapter.
 838  * hw - Struct containing variables accessed by shared code
 839  * Assumes that the controller has previously been reset and is in a
 840  * post-reset uninitialized state. Initializes multicast table,
 841  * and  Calls routines to setup link
 842  * Leaves the transmit and receive units disabled and uninitialized.
 843  */
 844 static s32 atl1_init_hw(struct atl1_hw *hw)
 845 {
 846         u32 ret_val = 0;
 847
 848         /* Zero out the Multicast HASH table */
 849         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 850         /* clear the old settings from the multicast hash table */
 851         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 852
 853         atl1_init_flash_opcode(hw);
 854
 855         if (!hw->phy_configured) {
 856                 /* enable GPHY LinkChange Interrrupt */
 857                 ret_val = atl1_write_phy_reg(hw, 18, 0xC00);
 858                 if (ret_val)
 859                         return ret_val;
 860                 /* make PHY out of power-saving state */
 861                 ret_val = atl1_phy_leave_power_saving(hw);
 862                 if (ret_val)
 863                         return ret_val;
 864                 /* Call a subroutine to configure the link */
 865                 ret_val = atl1_setup_link(hw);
 866         }
 867         return ret_val;
 868 }
 869
 870 /*
 871  * Detects the current speed and duplex settings of the hardware.
 872  * hw - Struct containing variables accessed by shared code
 873  * speed - Speed of the connection
 874  * duplex - Duplex setting of the connection
 875  */
 876 static s32 atl1_get_speed_and_duplex(struct atl1_hw *hw, u16 *speed, u16 *duplex)
 877 {
 878         struct pci_dev *pdev = hw->back->pdev;
 879         struct atl1_adapter *adapter = hw->back;
 880         s32 ret_val;
 881         u16 phy_data;
 882
 883         /* ; --- Read   PHY Specific Status Register (17) */
 884         ret_val = atl1_read_phy_reg(hw, MII_ATLX_PSSR, &phy_data);
 885         if (ret_val)
 886                 return ret_val;
 887
 888         if (!(phy_data & MII_ATLX_PSSR_SPD_DPLX_RESOLVED))
 889                 return ATLX_ERR_PHY_RES;
 890
 891         switch (phy_data & MII_ATLX_PSSR_SPEED) {
 892         case MII_ATLX_PSSR_1000MBS:
 893                 *speed = SPEED_1000;
 894                 break;
 895         case MII_ATLX_PSSR_100MBS:
 896                 *speed = SPEED_100;
 897                 break;
 898         case MII_ATLX_PSSR_10MBS:
 899                 *speed = SPEED_10;
 900                 break;
 901         default:
 902                 if (netif_msg_hw(adapter))
 903                         dev_dbg(&pdev->dev, "error getting speed\n");
 904                 return ATLX_ERR_PHY_SPEED;
 905                 break;
 906         }
 907         if (phy_data & MII_ATLX_PSSR_DPLX)
 908                 *duplex = FULL_DUPLEX;
 909         else
 910                 *duplex = HALF_DUPLEX;
 911
 912         return 0;
 913 }
 914
 915 void atl1_set_mac_addr(struct atl1_hw *hw)
 916 {
 917         u32 value;
 918         /*
 919          * 00-0B-6A-F6-00-DC
 920          * 0:  6AF600DC   1: 000B
 921          * low dword
 922          */
 923         value = (((u32) hw->mac_addr[2]) << 24) |
 924             (((u32) hw->mac_addr[3]) << 16) |
 925             (((u32) hw->mac_addr[4]) << 8) | (((u32) hw->mac_addr[5]));
 926         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
 927         /* high dword */
 928         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
 929         iowrite32(value, (hw->hw_addr + REG_MAC_STA_ADDR) + (1 << 2));
 930 }
 931
 932 /*
 933  * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
 934  * @adapter: board private structure to initialize
 935  *
 936  * atl1_sw_init initializes the Adapter private data structure.
 937  * Fields are initialized based on PCI device information and
 938  * OS network device settings (MTU size).
 939  */
 940 static int __devinit atl1_sw_init(struct atl1_adapter *adapter)
 941 {
 942         struct atl1_hw *hw = &adapter->hw;
 943         struct net_device *netdev = adapter->netdev;
 944
 945         hw->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 946         hw->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
 947
 948         adapter->wol = 0;
 949         adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
 950         adapter->ict = 50000;           /* 100ms */
 951         adapter->link_speed = SPEED_0;  /* hardware init */
 952         adapter->link_duplex = FULL_DUPLEX;
 953
 954         hw->phy_configured = false;
 955         hw->preamble_len = 7;
 956         hw->ipgt = 0x60;
 957         hw->min_ifg = 0x50;
 958         hw->ipgr1 = 0x40;
 959         hw->ipgr2 = 0x60;
 960         hw->max_retry = 0xf;
 961         hw->lcol = 0x37;
 962         hw->jam_ipg = 7;
 963         hw->rfd_burst = 8;
 964         hw->rrd_burst = 8;
 965         hw->rfd_fetch_gap = 1;
 966         hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
 967         hw->rx_jumbo_lkah = 1;
 968         hw->rrd_ret_timer = 16;
 969         hw->tpd_burst = 4;
 970         hw->tpd_fetch_th = 16;
 971         hw->txf_burst = 0x100;
 972         hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
 973         hw->tpd_fetch_gap = 1;
 974         hw->rcb_value = atl1_rcb_64;
 975         hw->dma_ord = atl1_dma_ord_enh;
 976         hw->dmar_block = atl1_dma_req_256;
 977         hw->dmaw_block = atl1_dma_req_256;
 978         hw->cmb_rrd = 4;
 979         hw->cmb_tpd = 4;
 980         hw->cmb_rx_timer = 1;   /* about 2us */
 981         hw->cmb_tx_timer = 1;   /* about 2us */
 982         hw->smb_timer = 100000; /* about 200ms */
 983
 984         spin_lock_init(&adapter->lock);
 985         spin_lock_init(&adapter->mb_lock);
 986
 987         return 0;
 988 }
 989
 990 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 991 {
 992         struct atl1_adapter *adapter = netdev_priv(netdev);
 993         u16 result;
 994
 995         atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
 996
 997         return result;
 998 }
 999
1000 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num,
1001         int val)
1002 {
1003         struct atl1_adapter *adapter = netdev_priv(netdev);
1004
1005         atl1_write_phy_reg(&adapter->hw, reg_num, val);
1006 }
1007
1008 /*
1009  * atl1_mii_ioctl -
1010  * @netdev:
1011  * @ifreq:
1012  * @cmd:
1013  */
1014 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1015 {
1016         struct atl1_adapter *adapter = netdev_priv(netdev);
1017         unsigned long flags;
1018         int retval;
1019
1020         if (!netif_running(netdev))
1021                 return -EINVAL;
1022
1023         spin_lock_irqsave(&adapter->lock, flags);
1024         retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
1025         spin_unlock_irqrestore(&adapter->lock, flags);
1026
1027         return retval;
1028 }
1029
1030 /*
1031  * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
1032  * @adapter: board private structure
1033  *
1034  * Return 0 on success, negative on failure
1035  */
1036 static s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
1037 {
1038         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1039         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1040         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1041         struct atl1_ring_header *ring_header = &adapter->ring_header;
1042         struct pci_dev *pdev = adapter->pdev;
1043         int size;
1044         u8 offset = 0;
1045
1046         size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
1047         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1048         if (unlikely(!tpd_ring->buffer_info)) {
1049                 if (netif_msg_drv(adapter))
1050                         dev_err(&pdev->dev, "kzalloc failed , size = D%d\n",
1051                                 size);
1052                 goto err_nomem;
1053         }
1054         rfd_ring->buffer_info =
1055                 (struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
1056
1057         /*
1058          * real ring DMA buffer
1059          * each ring/block may need up to 8 bytes for alignment, hence the
1060          * additional 40 bytes tacked onto the end.
1061          */
1062         ring_header->size = size =
1063                 sizeof(struct tx_packet_desc) * tpd_ring->count
1064                 + sizeof(struct rx_free_desc) * rfd_ring->count
1065                 + sizeof(struct rx_return_desc) * rrd_ring->count
1066                 + sizeof(struct coals_msg_block)
1067                 + sizeof(struct stats_msg_block)
1068                 + 40;
1069
1070         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1071                 &ring_header->dma);
1072         if (unlikely(!ring_header->desc)) {
1073                 if (netif_msg_drv(adapter))
1074                         dev_err(&pdev->dev, "pci_alloc_consistent failed\n");
1075                 goto err_nomem;
1076         }
1077
1078         memset(ring_header->desc, 0, ring_header->size);
1079
1080         /* init TPD ring */
1081         tpd_ring->dma = ring_header->dma;
1082         offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
1083         tpd_ring->dma += offset;
1084         tpd_ring->desc = (u8 *) ring_header->desc + offset;
1085         tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
1086
1087         /* init RFD ring */
1088         rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
1089         offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
1090         rfd_ring->dma += offset;
1091         rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
1092         rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
1093
1094
1095         /* init RRD ring */
1096         rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
1097         offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
1098         rrd_ring->dma += offset;
1099         rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
1100         rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
1101
1102
1103         /* init CMB */
1104         adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
1105         offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
1106         adapter->cmb.dma += offset;
1107         adapter->cmb.cmb = (struct coals_msg_block *)
1108                 ((u8 *) rrd_ring->desc + (rrd_ring->size + offset));
1109
1110         /* init SMB */
1111         adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
1112         offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
1113         adapter->smb.dma += offset;
1114         adapter->smb.smb = (struct stats_msg_block *)
1115                 ((u8 *) adapter->cmb.cmb +
1116                 (sizeof(struct coals_msg_block) + offset));
1117
1118         return 0;
1119
1120 err_nomem:
1121         kfree(tpd_ring->buffer_info);
1122         return -ENOMEM;
1123 }
1124
1125 static void atl1_init_ring_ptrs(struct atl1_adapter *adapter)
1126 {
1127         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1128         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1129         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1130
1131         atomic_set(&tpd_ring->next_to_use, 0);
1132         atomic_set(&tpd_ring->next_to_clean, 0);
1133
1134         rfd_ring->next_to_clean = 0;
1135         atomic_set(&rfd_ring->next_to_use, 0);
1136
1137         rrd_ring->next_to_use = 0;
1138         atomic_set(&rrd_ring->next_to_clean, 0);
1139 }
1140
1141 /*
1142  * atl1_clean_rx_ring - Free RFD Buffers
1143  * @adapter: board private structure
1144  */
1145 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
1146 {
1147         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1148         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1149         struct atl1_buffer *buffer_info;
1150         struct pci_dev *pdev = adapter->pdev;
1151         unsigned long size;
1152         unsigned int i;
1153
1154         /* Free all the Rx ring sk_buffs */
1155         for (i = 0; i < rfd_ring->count; i++) {
1156                 buffer_info = &rfd_ring->buffer_info[i];
1157                 if (buffer_info->dma) {
1158                         pci_unmap_page(pdev, buffer_info->dma,
1159                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1160                         buffer_info->dma = 0;
1161                 }
1162                 if (buffer_info->skb) {
1163                         dev_kfree_skb(buffer_info->skb);
1164                         buffer_info->skb = NULL;
1165                 }
1166         }
1167
1168         size = sizeof(struct atl1_buffer) * rfd_ring->count;
1169         memset(rfd_ring->buffer_info, 0, size);
1170
1171         /* Zero out the descriptor ring */
1172         memset(rfd_ring->desc, 0, rfd_ring->size);
1173
1174         rfd_ring->next_to_clean = 0;
1175         atomic_set(&rfd_ring->next_to_use, 0);
1176
1177         rrd_ring->next_to_use = 0;
1178         atomic_set(&rrd_ring->next_to_clean, 0);
1179 }
1180
1181 /*
1182  * atl1_clean_tx_ring - Free Tx Buffers
1183  * @adapter: board private structure
1184  */
1185 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
1186 {
1187         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1188         struct atl1_buffer *buffer_info;
1189         struct pci_dev *pdev = adapter->pdev;
1190         unsigned long size;
1191         unsigned int i;
1192
1193         /* Free all the Tx ring sk_buffs */
1194         for (i = 0; i < tpd_ring->count; i++) {
1195                 buffer_info = &tpd_ring->buffer_info[i];
1196                 if (buffer_info->dma) {
1197                         pci_unmap_page(pdev, buffer_info->dma,
1198                                 buffer_info->length, PCI_DMA_TODEVICE);
1199                         buffer_info->dma = 0;
1200                 }
1201         }
1202
1203         for (i = 0; i < tpd_ring->count; i++) {
1204                 buffer_info = &tpd_ring->buffer_info[i];
1205                 if (buffer_info->skb) {
1206                         dev_kfree_skb_any(buffer_info->skb);
1207                         buffer_info->skb = NULL;
1208                 }
1209         }
1210
1211         size = sizeof(struct atl1_buffer) * tpd_ring->count;
1212         memset(tpd_ring->buffer_info, 0, size);
1213
1214         /* Zero out the descriptor ring */
1215         memset(tpd_ring->desc, 0, tpd_ring->size);
1216
1217         atomic_set(&tpd_ring->next_to_use, 0);
1218         atomic_set(&tpd_ring->next_to_clean, 0);
1219 }
1220
1221 /*
1222  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
1223  * @adapter: board private structure
1224  *
1225  * Free all transmit software resources
1226  */
1227 static void atl1_free_ring_resources(struct atl1_adapter *adapter)
1228 {
1229         struct pci_dev *pdev = adapter->pdev;
1230         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1231         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1232         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1233         struct atl1_ring_header *ring_header = &adapter->ring_header;
1234
1235         atl1_clean_tx_ring(adapter);
1236         atl1_clean_rx_ring(adapter);
1237
1238         kfree(tpd_ring->buffer_info);
1239         pci_free_consistent(pdev, ring_header->size, ring_header->desc,
1240                 ring_header->dma);
1241
1242         tpd_ring->buffer_info = NULL;
1243         tpd_ring->desc = NULL;
1244         tpd_ring->dma = 0;
1245
1246         rfd_ring->buffer_info = NULL;
1247         rfd_ring->desc = NULL;
1248         rfd_ring->dma = 0;
1249
1250         rrd_ring->desc = NULL;
1251         rrd_ring->dma = 0;
1252 }
1253
1254 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
1255 {
1256         u32 value;
1257         struct atl1_hw *hw = &adapter->hw;
1258         struct net_device *netdev = adapter->netdev;
1259         /* Config MAC CTRL Register */
1260         value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1261         /* duplex */
1262         if (FULL_DUPLEX == adapter->link_duplex)
1263                 value |= MAC_CTRL_DUPLX;
1264         /* speed */
1265         value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
1266                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1267                   MAC_CTRL_SPEED_SHIFT);
1268         /* flow control */
1269         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1270         /* PAD & CRC */
1271         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1272         /* preamble length */
1273         value |= (((u32) adapter->hw.preamble_len
1274                    & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1275         /* vlan */
1276         if (adapter->vlgrp)
1277                 value |= MAC_CTRL_RMV_VLAN;
1278         /* rx checksum
1279            if (adapter->rx_csum)
1280            value |= MAC_CTRL_RX_CHKSUM_EN;
1281          */
1282         /* filter mode */
1283         value |= MAC_CTRL_BC_EN;
1284         if (netdev->flags & IFF_PROMISC)
1285                 value |= MAC_CTRL_PROMIS_EN;
1286         else if (netdev->flags & IFF_ALLMULTI)
1287                 value |= MAC_CTRL_MC_ALL_EN;
1288         /* value |= MAC_CTRL_LOOPBACK; */
1289         iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
1290 }
1291
1292 static u32 atl1_check_link(struct atl1_adapter *adapter)
1293 {
1294         struct atl1_hw *hw = &adapter->hw;
1295         struct net_device *netdev = adapter->netdev;
1296         u32 ret_val;
1297         u16 speed, duplex, phy_data;
1298         int reconfig = 0;
1299
1300         /* MII_BMSR must read twice */
1301         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
1302         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
1303         if (!(phy_data & BMSR_LSTATUS)) {
1304                 /* link down */
1305                 if (netif_carrier_ok(netdev)) {
1306                         /* old link state: Up */
1307                         if (netif_msg_link(adapter))
1308                                 dev_info(&adapter->pdev->dev, "link is down\n");
1309                         adapter->link_speed = SPEED_0;
1310                         netif_carrier_off(netdev);
1311                 }
1312                 return 0;
1313         }
1314
1315         /* Link Up */
1316         ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
1317         if (ret_val)
1318                 return ret_val;
1319
1320         switch (hw->media_type) {
1321         case MEDIA_TYPE_1000M_FULL:
1322                 if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
1323                         reconfig = 1;
1324                 break;
1325         case MEDIA_TYPE_100M_FULL:
1326                 if (speed != SPEED_100 || duplex != FULL_DUPLEX)
1327                         reconfig = 1;
1328                 break;
1329         case MEDIA_TYPE_100M_HALF:
1330                 if (speed != SPEED_100 || duplex != HALF_DUPLEX)
1331                         reconfig = 1;
1332                 break;
1333         case MEDIA_TYPE_10M_FULL:
1334                 if (speed != SPEED_10 || duplex != FULL_DUPLEX)
1335                         reconfig = 1;
1336                 break;
1337         case MEDIA_TYPE_10M_HALF:
1338                 if (speed != SPEED_10 || duplex != HALF_DUPLEX)
1339                         reconfig = 1;
1340                 break;
1341         }
1342
1343         /* link result is our setting */
1344         if (!reconfig) {
1345                 if (adapter->link_speed != speed
1346                     || adapter->link_duplex != duplex) {
1347                         adapter->link_speed = speed;
1348                         adapter->link_duplex = duplex;
1349                         atl1_setup_mac_ctrl(adapter);
1350                         if (netif_msg_link(adapter))
1351                                 dev_info(&adapter->pdev->dev,
1352                                         "%s link is up %d Mbps %s\n",
1353                                         netdev->name, adapter->link_speed,
1354                                         adapter->link_duplex == FULL_DUPLEX ?
1355                                         "full duplex" : "half duplex");
1356                 }
1357                 if (!netif_carrier_ok(netdev)) {
1358                         /* Link down -> Up */
1359                         netif_carrier_on(netdev);
1360                 }
1361                 return 0;
1362         }
1363
1364         /* change original link status */
1365         if (netif_carrier_ok(netdev)) {
1366                 adapter->link_speed = SPEED_0;
1367                 netif_carrier_off(netdev);
1368                 netif_stop_queue(netdev);
1369         }
1370
1371         if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
1372             hw->media_type != MEDIA_TYPE_1000M_FULL) {
1373                 switch (hw->media_type) {
1374                 case MEDIA_TYPE_100M_FULL:
1375                         phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
1376                                    MII_CR_RESET;
1377                         break;
1378                 case MEDIA_TYPE_100M_HALF:
1379                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
1380                         break;
1381                 case MEDIA_TYPE_10M_FULL:
1382                         phy_data =
1383                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
1384                         break;
1385                 default:
1386                         /* MEDIA_TYPE_10M_HALF: */
1387                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
1388                         break;
1389                 }
1390                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
1391                 return 0;
1392         }
1393
1394         /* auto-neg, insert timer to re-config phy */
1395         if (!adapter->phy_timer_pending) {
1396                 adapter->phy_timer_pending = true;
1397                 mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
1398         }
1399
1400         return 0;
1401 }
1402
1403 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
1404 {
1405         u32 hi, lo, value;
1406
1407         /* RFD Flow Control */
1408         value = adapter->rfd_ring.count;
1409         hi = value / 16;
1410         if (hi < 2)
1411                 hi = 2;
1412         lo = value * 7 / 8;
1413
1414         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1415                 ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1416         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1417
1418         /* RRD Flow Control */
1419         value = adapter->rrd_ring.count;
1420         lo = value / 16;
1421         hi = value * 7 / 8;
1422         if (lo < 2)
1423                 lo = 2;
1424         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1425                 ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1426         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1427 }
1428
1429 static void set_flow_ctrl_new(struct atl1_hw *hw)
1430 {
1431         u32 hi, lo, value;
1432
1433         /* RXF Flow Control */
1434         value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
1435         lo = value / 16;
1436         if (lo < 192)
1437                 lo = 192;
1438         hi = value * 7 / 8;
1439         if (hi < lo)
1440                 hi = lo + 16;
1441         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1442                 ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1443         iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1444
1445         /* RRD Flow Control */
1446         value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
1447         lo = value / 8;
1448         hi = value * 7 / 8;
1449         if (lo < 2)
1450                 lo = 2;
1451         if (hi < lo)
1452                 hi = lo + 3;
1453         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1454                 ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1455         iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1456 }
1457
1458 /*
1459  * atl1_configure - Configure Transmit&Receive Unit after Reset
1460  * @adapter: board private structure
1461  *
1462  * Configure the Tx /Rx unit of the MAC after a reset.
1463  */
1464 static u32 atl1_configure(struct atl1_adapter *adapter)
1465 {
1466         struct atl1_hw *hw = &adapter->hw;
1467         u32 value;
1468
1469         /* clear interrupt status */
1470         iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
1471
1472         /* set MAC Address */
1473         value = (((u32) hw->mac_addr[2]) << 24) |
1474                 (((u32) hw->mac_addr[3]) << 16) |
1475                 (((u32) hw->mac_addr[4]) << 8) |
1476                 (((u32) hw->mac_addr[5]));
1477         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
1478         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
1479         iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
1480
1481         /* tx / rx ring */
1482
1483         /* HI base address */
1484         iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
1485                 hw->hw_addr + REG_DESC_BASE_ADDR_HI);
1486         /* LO base address */
1487         iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
1488                 hw->hw_addr + REG_DESC_RFD_ADDR_LO);
1489         iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
1490                 hw->hw_addr + REG_DESC_RRD_ADDR_LO);
1491         iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
1492                 hw->hw_addr + REG_DESC_TPD_ADDR_LO);
1493         iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
1494                 hw->hw_addr + REG_DESC_CMB_ADDR_LO);
1495         iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
1496                 hw->hw_addr + REG_DESC_SMB_ADDR_LO);
1497
1498         /* element count */
1499         value = adapter->rrd_ring.count;
1500         value <<= 16;
1501         value += adapter->rfd_ring.count;
1502         iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
1503         iowrite32(adapter->tpd_ring.count, hw->hw_addr +
1504                 REG_DESC_TPD_RING_SIZE);
1505
1506         /* Load Ptr */
1507         iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
1508
1509         /* config Mailbox */
1510         value = ((atomic_read(&adapter->tpd_ring.next_to_use)
1511                   & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
1512                 ((atomic_read(&adapter->rrd_ring.next_to_clean)
1513                 & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
1514                 ((atomic_read(&adapter->rfd_ring.next_to_use)
1515                 & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
1516         iowrite32(value, hw->hw_addr + REG_MAILBOX);
1517
1518         /* config IPG/IFG */
1519         value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
1520                  << MAC_IPG_IFG_IPGT_SHIFT) |
1521                 (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
1522                 << MAC_IPG_IFG_MIFG_SHIFT) |
1523                 (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
1524                 << MAC_IPG_IFG_IPGR1_SHIFT) |
1525                 (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
1526                 << MAC_IPG_IFG_IPGR2_SHIFT);
1527         iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
1528
1529         /* config  Half-Duplex Control */
1530         value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
1531                 (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
1532                 << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
1533                 MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
1534                 (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
1535                 (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
1536                 << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
1537         iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
1538
1539         /* set Interrupt Moderator Timer */
1540         iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
1541         iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
1542
1543         /* set Interrupt Clear Timer */
1544         iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
1545
1546         /* set max frame size hw will accept */
1547         iowrite32(hw->max_frame_size, hw->hw_addr + REG_MTU);
1548
1549         /* jumbo size & rrd retirement timer */
1550         value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
1551                  << RXQ_JMBOSZ_TH_SHIFT) |
1552                 (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
1553                 << RXQ_JMBO_LKAH_SHIFT) |
1554                 (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
1555                 << RXQ_RRD_TIMER_SHIFT);
1556         iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
1557
1558         /* Flow Control */
1559         switch (hw->dev_rev) {
1560         case 0x8001:
1561         case 0x9001:
1562         case 0x9002:
1563         case 0x9003:
1564                 set_flow_ctrl_old(adapter);
1565                 break;
1566         default:
1567                 set_flow_ctrl_new(hw);
1568                 break;
1569         }
1570
1571         /* config TXQ */
1572         value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
1573                  << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
1574                 (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
1575                 << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
1576                 (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
1577                 << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE |
1578                 TXQ_CTRL_EN;
1579         iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
1580
1581         /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
1582         value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
1583                 << TX_JUMBO_TASK_TH_SHIFT) |
1584                 (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
1585                 << TX_TPD_MIN_IPG_SHIFT);
1586         iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
1587
1588         /* config RXQ */
1589         value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
1590                 << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
1591                 (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
1592                 << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
1593                 (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
1594                 << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) | RXQ_CTRL_CUT_THRU_EN |
1595                 RXQ_CTRL_EN;
1596         iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
1597
1598         /* config DMA Engine */
1599         value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1600                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1601                 ((((u32) hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1602                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
1603                 DMA_CTRL_DMAW_EN;
1604         value |= (u32) hw->dma_ord;
1605         if (atl1_rcb_128 == hw->rcb_value)
1606                 value |= DMA_CTRL_RCB_VALUE;
1607         iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
1608
1609         /* config CMB / SMB */
1610         value = (hw->cmb_tpd > adapter->tpd_ring.count) ?
1611                 hw->cmb_tpd : adapter->tpd_ring.count;
1612         value <<= 16;
1613         value |= hw->cmb_rrd;
1614         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
1615         value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
1616         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
1617         iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
1618
1619         /* --- enable CMB / SMB */
1620         value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
1621         iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
1622
1623         value = ioread32(adapter->hw.hw_addr + REG_ISR);
1624         if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
1625                 value = 1;      /* config failed */
1626         else
1627                 value = 0;
1628
1629         /* clear all interrupt status */
1630         iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
1631         iowrite32(0, adapter->hw.hw_addr + REG_ISR);
1632         return value;
1633 }
1634
1635 /*
1636  * atl1_pcie_patch - Patch for PCIE module
1637  */
1638 static void atl1_pcie_patch(struct atl1_adapter *adapter)
1639 {
1640         u32 value;
1641
1642         /* much vendor magic here */
1643         value = 0x6500;
1644         iowrite32(value, adapter->hw.hw_addr + 0x12FC);
1645         /* pcie flow control mode change */
1646         value = ioread32(adapter->hw.hw_addr + 0x1008);
1647         value |= 0x8000;
1648         iowrite32(value, adapter->hw.hw_addr + 0x1008);
1649 }
1650
1651 /*
1652  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
1653  * on PCI Command register is disable.
1654  * The function enable this bit.
1655  * Brackett, 2006/03/15
1656  */
1657 static void atl1_via_workaround(struct atl1_adapter *adapter)
1658 {
1659         unsigned long value;
1660
1661         value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
1662         if (value & PCI_COMMAND_INTX_DISABLE)
1663                 value &= ~PCI_COMMAND_INTX_DISABLE;
1664         iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
1665 }
1666
1667 static void atl1_inc_smb(struct atl1_adapter *adapter)
1668 {
1669         struct stats_msg_block *smb = adapter->smb.smb;
1670
1671         /* Fill out the OS statistics structure */
1672         adapter->soft_stats.rx_packets += smb->rx_ok;
1673         adapter->soft_stats.tx_packets += smb->tx_ok;
1674         adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
1675         adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
1676         adapter->soft_stats.multicast += smb->rx_mcast;
1677         adapter->soft_stats.collisions += (smb->tx_1_col + smb->tx_2_col * 2 +
1678                 smb->tx_late_col + smb->tx_abort_col * adapter->hw.max_retry);
1679
1680         /* Rx Errors */
1681         adapter->soft_stats.rx_errors += (smb->rx_frag + smb->rx_fcs_err +
1682                 smb->rx_len_err + smb->rx_sz_ov + smb->rx_rxf_ov +
1683                 smb->rx_rrd_ov + smb->rx_align_err);
1684         adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
1685         adapter->soft_stats.rx_length_errors += smb->rx_len_err;
1686         adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
1687         adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
1688         adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
1689                 smb->rx_rxf_ov);
1690
1691         adapter->soft_stats.rx_pause += smb->rx_pause;
1692         adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
1693         adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
1694
1695         /* Tx Errors */
1696         adapter->soft_stats.tx_errors += (smb->tx_late_col +
1697                 smb->tx_abort_col + smb->tx_underrun + smb->tx_trunc);
1698         adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
1699         adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
1700         adapter->soft_stats.tx_window_errors += smb->tx_late_col;
1701
1702         adapter->soft_stats.excecol += smb->tx_abort_col;
1703         adapter->soft_stats.deffer += smb->tx_defer;
1704         adapter->soft_stats.scc += smb->tx_1_col;
1705         adapter->soft_stats.mcc += smb->tx_2_col;
1706         adapter->soft_stats.latecol += smb->tx_late_col;
1707         adapter->soft_stats.tx_underun += smb->tx_underrun;
1708         adapter->soft_stats.tx_trunc += smb->tx_trunc;
1709         adapter->soft_stats.tx_pause += smb->tx_pause;
1710
1711         adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
1712         adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
1713         adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
1714         adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
1715         adapter->net_stats.multicast = adapter->soft_stats.multicast;
1716         adapter->net_stats.collisions = adapter->soft_stats.collisions;
1717         adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
1718         adapter->net_stats.rx_over_errors =
1719                 adapter->soft_stats.rx_missed_errors;
1720         adapter->net_stats.rx_length_errors =
1721                 adapter->soft_stats.rx_length_errors;
1722         adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
1723         adapter->net_stats.rx_frame_errors =
1724                 adapter->soft_stats.rx_frame_errors;
1725         adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
1726         adapter->net_stats.rx_missed_errors =
1727                 adapter->soft_stats.rx_missed_errors;
1728         adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
1729         adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
1730         adapter->net_stats.tx_aborted_errors =
1731                 adapter->soft_stats.tx_aborted_errors;
1732         adapter->net_stats.tx_window_errors =
1733                 adapter->soft_stats.tx_window_errors;
1734         adapter->net_stats.tx_carrier_errors =
1735                 adapter->soft_stats.tx_carrier_errors;
1736 }
1737
1738 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1739 {
1740         unsigned long flags;
1741         u32 tpd_next_to_use;
1742         u32 rfd_next_to_use;
1743         u32 rrd_next_to_clean;
1744         u32 value;
1745
1746         spin_lock_irqsave(&adapter->mb_lock, flags);
1747
1748         tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1749         rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1750         rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1751
1752         value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1753                 MB_RFD_PROD_INDX_SHIFT) |
1754                 ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1755                 MB_RRD_CONS_INDX_SHIFT) |
1756                 ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1757                 MB_TPD_PROD_INDX_SHIFT);
1758         iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1759
1760         spin_unlock_irqrestore(&adapter->mb_lock, flags);
1761 }
1762
1763 static void atl1_clean_alloc_flag(struct atl1_adapter *adapter,
1764         struct rx_return_desc *rrd, u16 offset)
1765 {
1766         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1767
1768         while (rfd_ring->next_to_clean != (rrd->buf_indx + offset)) {
1769                 rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced = 0;
1770                 if (++rfd_ring->next_to_clean == rfd_ring->count) {
1771                         rfd_ring->next_to_clean = 0;
1772                 }
1773         }
1774 }
1775
1776 static void atl1_update_rfd_index(struct atl1_adapter *adapter,
1777         struct rx_return_desc *rrd)
1778 {
1779         u16 num_buf;
1780
1781         num_buf = (rrd->xsz.xsum_sz.pkt_size + adapter->rx_buffer_len - 1) /
1782                 adapter->rx_buffer_len;
1783         if (rrd->num_buf == num_buf)
1784                 /* clean alloc flag for bad rrd */
1785                 atl1_clean_alloc_flag(adapter, rrd, num_buf);
1786 }
1787
1788 static void atl1_rx_checksum(struct atl1_adapter *adapter,
1789         struct rx_return_desc *rrd, struct sk_buff *skb)
1790 {
1791         struct pci_dev *pdev = adapter->pdev;
1792
1793         /*
1794          * The L1 hardware contains a bug that erroneously sets the
1795          * PACKET_FLAG_ERR and ERR_FLAG_L4_CHKSUM bits whenever a
1796          * fragmented IP packet is received, even though the packet
1797          * is perfectly valid and its checksum is correct. There's
1798          * no way to distinguish between one of these good packets
1799          * and a packet that actually contains a TCP/UDP checksum
1800          * error, so all we can do is allow it to be handed up to
1801          * the higher layers and let it be sorted out there.
1802          */
1803
1804         skb->ip_summed = CHECKSUM_NONE;
1805
1806         if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
1807                 if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
1808                                         ERR_FLAG_CODE | ERR_FLAG_OV)) {
1809                         adapter->hw_csum_err++;
1810                         if (netif_msg_rx_err(adapter))
1811                                 dev_printk(KERN_DEBUG, &pdev->dev,
1812                                         "rx checksum error\n");
1813                         return;
1814                 }
1815         }
1816
1817         /* not IPv4 */
1818         if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
1819                 /* checksum is invalid, but it's not an IPv4 pkt, so ok */
1820                 return;
1821
1822         /* IPv4 packet */
1823         if (likely(!(rrd->err_flg &
1824                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
1825                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1826                 adapter->hw_csum_good++;
1827                 return;
1828         }
1829
1830         return;
1831 }
1832
1833 /*
1834  * atl1_alloc_rx_buffers - Replace used receive buffers
1835  * @adapter: address of board private structure
1836  */
1837 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
1838 {
1839         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1840         struct pci_dev *pdev = adapter->pdev;
1841         struct page *page;
1842         unsigned long offset;
1843         struct atl1_buffer *buffer_info, *next_info;
1844         struct sk_buff *skb;
1845         u16 num_alloc = 0;
1846         u16 rfd_next_to_use, next_next;
1847         struct rx_free_desc *rfd_desc;
1848
1849         next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
1850         if (++next_next == rfd_ring->count)
1851                 next_next = 0;
1852         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1853         next_info = &rfd_ring->buffer_info[next_next];
1854
1855         while (!buffer_info->alloced && !next_info->alloced) {
1856                 if (buffer_info->skb) {
1857                         buffer_info->alloced = 1;
1858                         goto next;
1859                 }
1860
1861                 rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
1862
1863                 skb = netdev_alloc_skb(adapter->netdev,
1864                                        adapter->rx_buffer_len + NET_IP_ALIGN);
1865                 if (unlikely(!skb)) {
1866                         /* Better luck next round */
1867                         adapter->net_stats.rx_dropped++;
1868                         break;
1869                 }
1870
1871                 /*
1872                  * Make buffer alignment 2 beyond a 16 byte boundary
1873                  * this will result in a 16 byte aligned IP header after
1874                  * the 14 byte MAC header is removed
1875                  */
1876                 skb_reserve(skb, NET_IP_ALIGN);
1877
1878                 buffer_info->alloced = 1;
1879                 buffer_info->skb = skb;
1880                 buffer_info->length = (u16) adapter->rx_buffer_len;
1881                 page = virt_to_page(skb->data);
1882                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1883                 buffer_info->dma = pci_map_page(pdev, page, offset,
1884                                                 adapter->rx_buffer_len,
1885                                                 PCI_DMA_FROMDEVICE);
1886                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1887                 rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
1888                 rfd_desc->coalese = 0;
1889
1890 next:
1891                 rfd_next_to_use = next_next;
1892                 if (unlikely(++next_next == rfd_ring->count))
1893                         next_next = 0;
1894
1895                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1896                 next_info = &rfd_ring->buffer_info[next_next];
1897                 num_alloc++;
1898         }
1899
1900         if (num_alloc) {
1901                 /*
1902                  * Force memory writes to complete before letting h/w
1903                  * know there are new descriptors to fetch.  (Only
1904                  * applicable for weak-ordered memory model archs,
1905                  * such as IA-64).
1906                  */
1907                 wmb();
1908                 atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
1909         }
1910         return num_alloc;
1911 }
1912
1913 static void atl1_intr_rx(struct atl1_adapter *adapter)
1914 {
1915         int i, count;
1916         u16 length;
1917         u16 rrd_next_to_clean;
1918         u32 value;
1919         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1920         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1921         struct atl1_buffer *buffer_info;
1922         struct rx_return_desc *rrd;
1923         struct sk_buff *skb;
1924
1925         count = 0;
1926
1927         rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
1928
1929         while (1) {
1930                 rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
1931                 i = 1;
1932                 if (likely(rrd->xsz.valid)) {   /* packet valid */
1933 chk_rrd:
1934                         /* check rrd status */
1935                         if (likely(rrd->num_buf == 1))
1936                                 goto rrd_ok;
1937                         else if (netif_msg_rx_err(adapter)) {
1938                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1939                                         "unexpected RRD buffer count\n");
1940                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1941                                         "rx_buf_len = %d\n",
1942                                         adapter->rx_buffer_len);
1943                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1944                                         "RRD num_buf = %d\n",
1945                                         rrd->num_buf);
1946                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1947                                         "RRD pkt_len = %d\n",
1948                                         rrd->xsz.xsum_sz.pkt_size);
1949                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1950                                         "RRD pkt_flg = 0x%08X\n",
1951                                         rrd->pkt_flg);
1952                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1953                                         "RRD err_flg = 0x%08X\n",
1954                                         rrd->err_flg);
1955                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1956                                         "RRD vlan_tag = 0x%08X\n",
1957                                         rrd->vlan_tag);
1958                         }
1959
1960                         /* rrd seems to be bad */
1961                         if (unlikely(i-- > 0)) {
1962                                 /* rrd may not be DMAed completely */
1963                                 udelay(1);
1964                                 goto chk_rrd;
1965                         }
1966                         /* bad rrd */
1967                         if (netif_msg_rx_err(adapter))
1968                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1969                                         "bad RRD\n");
1970                         /* see if update RFD index */
1971                         if (rrd->num_buf > 1)
1972                                 atl1_update_rfd_index(adapter, rrd);
1973
1974                         /* update rrd */
1975                         rrd->xsz.valid = 0;
1976                         if (++rrd_next_to_clean == rrd_ring->count)
1977                                 rrd_next_to_clean = 0;
1978                         count++;
1979                         continue;
1980                 } else {        /* current rrd still not be updated */
1981
1982                         break;
1983                 }
1984 rrd_ok:
1985                 /* clean alloc flag for bad rrd */
1986                 atl1_clean_alloc_flag(adapter, rrd, 0);
1987
1988                 buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
1989                 if (++rfd_ring->next_to_clean == rfd_ring->count)
1990                         rfd_ring->next_to_clean = 0;
1991
1992                 /* update rrd next to clean */
1993                 if (++rrd_next_to_clean == rrd_ring->count)
1994                         rrd_next_to_clean = 0;
1995                 count++;
1996
1997                 if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
1998                         if (!(rrd->err_flg &
1999                                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
2000                                 | ERR_FLAG_LEN))) {
2001                                 /* packet error, don't need upstream */
2002                                 buffer_info->alloced = 0;
2003                                 rrd->xsz.valid = 0;
2004                                 continue;
2005                         }
2006                 }
2007
2008                 /* Good Receive */
2009                 pci_unmap_page(adapter->pdev, buffer_info->dma,
2010                                buffer_info->length, PCI_DMA_FROMDEVICE);
2011                 buffer_info->dma = 0;
2012                 skb = buffer_info->skb;
2013                 length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
2014
2015                 skb_put(skb, length - ETH_FCS_LEN);
2016
2017                 /* Receive Checksum Offload */
2018                 atl1_rx_checksum(adapter, rrd, skb);
2019                 skb->protocol = eth_type_trans(skb, adapter->netdev);
2020
2021                 if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
2022                         u16 vlan_tag = (rrd->vlan_tag >> 4) |
2023                                         ((rrd->vlan_tag & 7) << 13) |
2024                                         ((rrd->vlan_tag & 8) << 9);
2025                         vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
2026                 } else
2027                         netif_rx(skb);
2028
2029                 /* let protocol layer free skb */
2030                 buffer_info->skb = NULL;
2031                 buffer_info->alloced = 0;
2032                 rrd->xsz.valid = 0;
2033
2034                 adapter->netdev->last_rx = jiffies;
2035         }
2036
2037         atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
2038
2039         atl1_alloc_rx_buffers(adapter);
2040
2041         /* update mailbox ? */
2042         if (count) {
2043                 u32 tpd_next_to_use;
2044                 u32 rfd_next_to_use;
2045
2046                 spin_lock(&adapter->mb_lock);
2047
2048                 tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
2049                 rfd_next_to_use =
2050                     atomic_read(&adapter->rfd_ring.next_to_use);
2051                 rrd_next_to_clean =
2052                     atomic_read(&adapter->rrd_ring.next_to_clean);
2053                 value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
2054                         MB_RFD_PROD_INDX_SHIFT) |
2055                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
2056                         MB_RRD_CONS_INDX_SHIFT) |
2057                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
2058                         MB_TPD_PROD_INDX_SHIFT);
2059                 iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
2060                 spin_unlock(&adapter->mb_lock);
2061         }
2062 }
2063
2064 static void atl1_intr_tx(struct atl1_adapter *adapter)
2065 {
2066         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2067         struct atl1_buffer *buffer_info;
2068         u16 sw_tpd_next_to_clean;
2069         u16 cmb_tpd_next_to_clean;
2070
2071         sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2072         cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
2073
2074         while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
2075                 struct tx_packet_desc *tpd;
2076
2077                 tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
2078                 buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
2079                 if (buffer_info->dma) {
2080                         pci_unmap_page(adapter->pdev, buffer_info->dma,
2081                                        buffer_info->length, PCI_DMA_TODEVICE);
2082                         buffer_info->dma = 0;
2083                 }
2084
2085                 if (buffer_info->skb) {
2086                         dev_kfree_skb_irq(buffer_info->skb);
2087                         buffer_info->skb = NULL;
2088                 }
2089
2090                 if (++sw_tpd_next_to_clean == tpd_ring->count)
2091                         sw_tpd_next_to_clean = 0;
2092         }
2093         atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
2094
2095         if (netif_queue_stopped(adapter->netdev)
2096             && netif_carrier_ok(adapter->netdev))
2097                 netif_wake_queue(adapter->netdev);
2098 }
2099
2100 static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
2101 {
2102         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2103         u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
2104         return ((next_to_clean > next_to_use) ?
2105                 next_to_clean - next_to_use - 1 :
2106                 tpd_ring->count + next_to_clean - next_to_use - 1);
2107 }
2108
2109 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
2110         struct tx_packet_desc *ptpd)
2111 {
2112         /* spinlock held */
2113         u8 hdr_len, ip_off;
2114         u32 real_len;
2115         int err;
2116
2117         if (skb_shinfo(skb)->gso_size) {
2118                 if (skb_header_cloned(skb)) {
2119                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2120                         if (unlikely(err))
2121                                 return -1;
2122                 }
2123
2124                 if (skb->protocol == htons(ETH_P_IP)) {
2125                         struct iphdr *iph = ip_hdr(skb);
2126
2127                         real_len = (((unsigned char *)iph - skb->data) +
2128                                 ntohs(iph->tot_len));
2129                         if (real_len < skb->len)
2130                                 pskb_trim(skb, real_len);
2131                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2132                         if (skb->len == hdr_len) {
2133                                 iph->check = 0;
2134                                 tcp_hdr(skb)->check =
2135                                         ~csum_tcpudp_magic(iph->saddr,
2136                                         iph->daddr, tcp_hdrlen(skb),
2137                                         IPPROTO_TCP, 0);
2138                                 ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
2139                                         TPD_IPHL_SHIFT;
2140                                 ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
2141                                         TPD_TCPHDRLEN_MASK) <<
2142                                         TPD_TCPHDRLEN_SHIFT;
2143                                 ptpd->word3 |= 1 << TPD_IP_CSUM_SHIFT;
2144                                 ptpd->word3 |= 1 << TPD_TCP_CSUM_SHIFT;
2145                                 return 1;
2146                         }
2147
2148                         iph->check = 0;
2149                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2150                                         iph->daddr, 0, IPPROTO_TCP, 0);
2151                         ip_off = (unsigned char *)iph -
2152                                 (unsigned char *) skb_network_header(skb);
2153                         if (ip_off == 8) /* 802.3-SNAP frame */
2154                                 ptpd->word3 |= 1 << TPD_ETHTYPE_SHIFT;
2155                         else if (ip_off != 0)
2156                                 return -2;
2157
2158                         ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
2159                                 TPD_IPHL_SHIFT;
2160                         ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
2161                                 TPD_TCPHDRLEN_MASK) << TPD_TCPHDRLEN_SHIFT;
2162                         ptpd->word3 |= (skb_shinfo(skb)->gso_size &
2163                                 TPD_MSS_MASK) << TPD_MSS_SHIFT;
2164                         ptpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
2165                         return 3;
2166                 }
2167         }
2168         return false;
2169 }
2170
2171 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
2172         struct tx_packet_desc *ptpd)
2173 {
2174         u8 css, cso;
2175
2176         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2177                 css = (u8) (skb->csum_start - skb_headroom(skb));
2178                 cso = css + (u8) skb->csum_offset;
2179                 if (unlikely(css & 0x1)) {
2180                         /* L1 hardware requires an even number here */
2181                         if (netif_msg_tx_err(adapter))
2182                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2183                                         "payload offset not an even number\n");
2184                         return -1;
2185                 }
2186                 ptpd->word3 |= (css & TPD_PLOADOFFSET_MASK) <<
2187                         TPD_PLOADOFFSET_SHIFT;
2188                 ptpd->word3 |= (cso & TPD_CCSUMOFFSET_MASK) <<
2189                         TPD_CCSUMOFFSET_SHIFT;
2190                 ptpd->word3 |= 1 << TPD_CUST_CSUM_EN_SHIFT;
2191                 return true;
2192         }
2193         return 0;
2194 }
2195
2196 static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
2197         struct tx_packet_desc *ptpd)
2198 {
2199         /* spinlock held */
2200         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2201         struct atl1_buffer *buffer_info;
2202         u16 buf_len = skb->len;
2203         struct page *page;
2204         unsigned long offset;
2205         unsigned int nr_frags;
2206         unsigned int f;
2207         int retval;
2208         u16 next_to_use;
2209         u16 data_len;
2210         u8 hdr_len;
2211
2212         buf_len -= skb->data_len;
2213         nr_frags = skb_shinfo(skb)->nr_frags;
2214         next_to_use = atomic_read(&tpd_ring->next_to_use);
2215         buffer_info = &tpd_ring->buffer_info[next_to_use];
2216         if (unlikely(buffer_info->skb))
2217                 BUG();
2218         /* put skb in last TPD */
2219         buffer_info->skb = NULL;
2220
2221         retval = (ptpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
2222         if (retval) {
2223                 /* TSO */
2224                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2225                 buffer_info->length = hdr_len;
2226                 page = virt_to_page(skb->data);
2227                 offset = (unsigned long)skb->data & ~PAGE_MASK;
2228                 buffer_info->dma = pci_map_page(adapter->pdev, page,
2229                                                 offset, hdr_len,
2230                                                 PCI_DMA_TODEVICE);
2231
2232                 if (++next_to_use == tpd_ring->count)
2233                         next_to_use = 0;
2234
2235                 if (buf_len > hdr_len) {
2236                         int i, nseg;
2237
2238                         data_len = buf_len - hdr_len;
2239                         nseg = (data_len + ATL1_MAX_TX_BUF_LEN - 1) /
2240                                 ATL1_MAX_TX_BUF_LEN;
2241                         for (i = 0; i < nseg; i++) {
2242                                 buffer_info =
2243                                     &tpd_ring->buffer_info[next_to_use];
2244                                 buffer_info->skb = NULL;
2245                                 buffer_info->length =
2246                                     (ATL1_MAX_TX_BUF_LEN >=
2247                                      data_len) ? ATL1_MAX_TX_BUF_LEN : data_len;
2248                                 data_len -= buffer_info->length;
2249                                 page = virt_to_page(skb->data +
2250                                         (hdr_len + i * ATL1_MAX_TX_BUF_LEN));
2251                                 offset = (unsigned long)(skb->data +
2252                                         (hdr_len + i * ATL1_MAX_TX_BUF_LEN)) &
2253                                         ~PAGE_MASK;
2254                                 buffer_info->dma = pci_map_page(adapter->pdev,
2255                                         page, offset, buffer_info->length,
2256                                         PCI_DMA_TODEVICE);
2257                                 if (++next_to_use == tpd_ring->count)
2258                                         next_to_use = 0;
2259                         }
2260                 }
2261         } else {
2262                 /* not TSO */
2263                 buffer_info->length = buf_len;
2264                 page = virt_to_page(skb->data);
2265                 offset = (unsigned long)skb->data & ~PAGE_MASK;
2266                 buffer_info->dma = pci_map_page(adapter->pdev, page,
2267                         offset, buf_len, PCI_DMA_TODEVICE);
2268                 if (++next_to_use == tpd_ring->count)
2269                         next_to_use = 0;
2270         }
2271
2272         for (f = 0; f < nr_frags; f++) {
2273                 struct skb_frag_struct *frag;
2274                 u16 i, nseg;
2275
2276                 frag = &skb_shinfo(skb)->frags[f];
2277                 buf_len = frag->size;
2278
2279                 nseg = (buf_len + ATL1_MAX_TX_BUF_LEN - 1) /
2280                         ATL1_MAX_TX_BUF_LEN;
2281                 for (i = 0; i < nseg; i++) {
2282                         buffer_info = &tpd_ring->buffer_info[next_to_use];
2283                         if (unlikely(buffer_info->skb))
2284                                 BUG();
2285                         buffer_info->skb = NULL;
2286                         buffer_info->length = (buf_len > ATL1_MAX_TX_BUF_LEN) ?
2287                                 ATL1_MAX_TX_BUF_LEN : buf_len;
2288                         buf_len -= buffer_info->length;
2289                         buffer_info->dma = pci_map_page(adapter->pdev,
2290                                 frag->page,
2291                                 frag->page_offset + (i * ATL1_MAX_TX_BUF_LEN),
2292                                 buffer_info->length, PCI_DMA_TODEVICE);
2293
2294                         if (++next_to_use == tpd_ring->count)
2295                                 next_to_use = 0;
2296                 }
2297         }
2298
2299         /* last tpd's buffer-info */
2300         buffer_info->skb = skb;
2301 }
2302
2303 static void atl1_tx_queue(struct atl1_adapter *adapter, u16 count,
2304        struct tx_packet_desc *ptpd)
2305 {
2306         /* spinlock held */
2307         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2308         struct atl1_buffer *buffer_info;
2309         struct tx_packet_desc *tpd;
2310         u16 j;
2311         u32 val;
2312         u16 next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);
2313
2314         for (j = 0; j < count; j++) {
2315                 buffer_info = &tpd_ring->buffer_info[next_to_use];
2316                 tpd = ATL1_TPD_DESC(&adapter->tpd_ring, next_to_use);
2317                 if (tpd != ptpd)
2318                         memcpy(tpd, ptpd, sizeof(struct tx_packet_desc));
2319                 tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2320                 tpd->word2 = (cpu_to_le16(buffer_info->length) &
2321                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT;
2322
2323                 /*
2324                  * if this is the first packet in a TSO chain, set
2325                  * TPD_HDRFLAG, otherwise, clear it.
2326                  */
2327                 val = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) &
2328                         TPD_SEGMENT_EN_MASK;
2329                 if (val) {
2330                         if (!j)
2331                                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
2332                         else
2333                                 tpd->word3 &= ~(1 << TPD_HDRFLAG_SHIFT);
2334                 }
2335
2336                 if (j == (count - 1))
2337                         tpd->word3 |= 1 << TPD_EOP_SHIFT;
2338
2339                 if (++next_to_use == tpd_ring->count)
2340                         next_to_use = 0;
2341         }
2342         /*
2343          * Force memory writes to complete before letting h/w
2344          * know there are new descriptors to fetch.  (Only
2345          * applicable for weak-ordered memory model archs,
2346          * such as IA-64).
2347          */
2348         wmb();
2349
2350         atomic_set(&tpd_ring->next_to_use, next_to_use);
2351 }
2352
2353 static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2354 {
2355         struct atl1_adapter *adapter = netdev_priv(netdev);
2356         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2357         int len = skb->len;
2358         int tso;
2359         int count = 1;
2360         int ret_val;
2361         struct tx_packet_desc *ptpd;
2362         u16 frag_size;
2363         u16 vlan_tag;
2364         unsigned long flags;
2365         unsigned int nr_frags = 0;
2366         unsigned int mss = 0;
2367         unsigned int f;
2368         unsigned int proto_hdr_len;
2369
2370         len -= skb->data_len;
2371
2372         if (unlikely(skb->len <= 0)) {
2373                 dev_kfree_skb_any(skb);
2374                 return NETDEV_TX_OK;
2375         }
2376
2377         nr_frags = skb_shinfo(skb)->nr_frags;
2378         for (f = 0; f < nr_frags; f++) {
2379                 frag_size = skb_shinfo(skb)->frags[f].size;
2380                 if (frag_size)
2381                         count += (frag_size + ATL1_MAX_TX_BUF_LEN - 1) /
2382                                 ATL1_MAX_TX_BUF_LEN;
2383         }
2384
2385         mss = skb_shinfo(skb)->gso_size;
2386         if (mss) {
2387                 if (skb->protocol == ntohs(ETH_P_IP)) {
2388                         proto_hdr_len = (skb_transport_offset(skb) +
2389                                          tcp_hdrlen(skb));
2390                         if (unlikely(proto_hdr_len > len)) {
2391                                 dev_kfree_skb_any(skb);
2392                                 return NETDEV_TX_OK;
2393                         }
2394                         /* need additional TPD ? */
2395                         if (proto_hdr_len != len)
2396                                 count += (len - proto_hdr_len +
2397                                         ATL1_MAX_TX_BUF_LEN - 1) /
2398                                         ATL1_MAX_TX_BUF_LEN;
2399                 }
2400         }
2401
2402         if (!spin_trylock_irqsave(&adapter->lock, flags)) {
2403                 /* Can't get lock - tell upper layer to requeue */
2404                 if (netif_msg_tx_queued(adapter))
2405                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2406                                 "tx locked\n");
2407                 return NETDEV_TX_LOCKED;
2408         }
2409
2410         if (atl1_tpd_avail(&adapter->tpd_ring) < count) {
2411                 /* not enough descriptors */
2412                 netif_stop_queue(netdev);
2413                 spin_unlock_irqrestore(&adapter->lock, flags);
2414                 if (netif_msg_tx_queued(adapter))
2415                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2416                                 "tx busy\n");
2417                 return NETDEV_TX_BUSY;
2418         }
2419
2420         ptpd = ATL1_TPD_DESC(tpd_ring,
2421                 (u16) atomic_read(&tpd_ring->next_to_use));
2422         memset(ptpd, 0, sizeof(struct tx_packet_desc));
2423
2424         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2425                 vlan_tag = vlan_tx_tag_get(skb);
2426                 vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
2427                         ((vlan_tag >> 9) & 0x8);
2428                 ptpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
2429                 ptpd->word3 |= (vlan_tag & TPD_VL_TAGGED_MASK) <<
2430                         TPD_VL_TAGGED_SHIFT;
2431         }
2432
2433         tso = atl1_tso(adapter, skb, ptpd);
2434         if (tso < 0) {
2435                 spin_unlock_irqrestore(&adapter->lock, flags);
2436                 dev_kfree_skb_any(skb);
2437                 return NETDEV_TX_OK;
2438         }
2439
2440         if (!tso) {
2441                 ret_val = atl1_tx_csum(adapter, skb, ptpd);
2442                 if (ret_val < 0) {
2443                         spin_unlock_irqrestore(&adapter->lock, flags);
2444                         dev_kfree_skb_any(skb);
2445                         return NETDEV_TX_OK;
2446                 }
2447         }
2448
2449         atl1_tx_map(adapter, skb, ptpd);
2450         atl1_tx_queue(adapter, count, ptpd);
2451         atl1_update_mailbox(adapter);
2452         spin_unlock_irqrestore(&adapter->lock, flags);
2453         netdev->trans_start = jiffies;
2454         return NETDEV_TX_OK;
2455 }
2456
2457 /*
2458  * atl1_intr - Interrupt Handler
2459  * @irq: interrupt number
2460  * @data: pointer to a network interface device structure
2461  * @pt_regs: CPU registers structure
2462  */
2463 static irqreturn_t atl1_intr(int irq, void *data)
2464 {
2465         struct atl1_adapter *adapter = netdev_priv(data);
2466         u32 status;
2467         int max_ints = 10;
2468
2469         status = adapter->cmb.cmb->int_stats;
2470         if (!status)
2471                 return IRQ_NONE;
2472
2473         do {
2474                 /* clear CMB interrupt status at once */
2475                 adapter->cmb.cmb->int_stats = 0;
2476
2477                 if (status & ISR_GPHY)  /* clear phy status */
2478                         atlx_clear_phy_int(adapter);
2479
2480                 /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
2481                 iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
2482
2483                 /* check if SMB intr */
2484                 if (status & ISR_SMB)
2485                         atl1_inc_smb(adapter);
2486
2487                 /* check if PCIE PHY Link down */
2488                 if (status & ISR_PHY_LINKDOWN) {
2489                         if (netif_msg_intr(adapter))
2490                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2491                                         "pcie phy link down %x\n", status);
2492                         if (netif_running(adapter->netdev)) {   /* reset MAC */
2493                                 iowrite32(0, adapter->hw.hw_addr + REG_IMR);
2494                                 schedule_work(&adapter->pcie_dma_to_rst_task);
2495                                 return IRQ_HANDLED;
2496                         }
2497                 }
2498
2499                 /* check if DMA read/write error ? */
2500                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
2501                         if (netif_msg_intr(adapter))
2502                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2503                                         "pcie DMA r/w error (status = 0x%x)\n",
2504                                         status);
2505                         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
2506                         schedule_work(&adapter->pcie_dma_to_rst_task);
2507                         return IRQ_HANDLED;
2508                 }
2509
2510                 /* link event */
2511                 if (status & ISR_GPHY) {
2512                         adapter->soft_stats.tx_carrier_errors++;
2513                         atl1_check_for_link(adapter);
2514                 }
2515
2516                 /* transmit event */
2517                 if (status & ISR_CMB_TX)
2518                         atl1_intr_tx(adapter);
2519
2520                 /* rx exception */
2521                 if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
2522                         ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
2523                         ISR_HOST_RRD_OV | ISR_CMB_RX))) {
2524                         if (status & (ISR_RXF_OV | ISR_RFD_UNRUN |
2525                                 ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
2526                                 ISR_HOST_RRD_OV))
2527                                 if (netif_msg_intr(adapter))
2528                                         dev_printk(KERN_DEBUG,
2529                                                 &adapter->pdev->dev,
2530                                                 "rx exception, ISR = 0x%x\n",
2531                                                 status);
2532                         atl1_intr_rx(adapter);
2533                 }
2534
2535                 if (--max_ints < 0)
2536                         break;
2537
2538         } while ((status = adapter->cmb.cmb->int_stats));
2539
2540         /* re-enable Interrupt */
2541         iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
2542         return IRQ_HANDLED;
2543 }
2544
2545 /*
2546  * atl1_watchdog - Timer Call-back
2547  * @data: pointer to netdev cast into an unsigned long
2548  */
2549 static void atl1_watchdog(unsigned long data)
2550 {
2551         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
2552
2553         /* Reset the timer */
2554         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2555 }
2556
2557 /*
2558  * atl1_phy_config - Timer Call-back
2559  * @data: pointer to netdev cast into an unsigned long
2560  */
2561 static void atl1_phy_config(unsigned long data)
2562 {
2563         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
2564         struct atl1_hw *hw = &adapter->hw;
2565         unsigned long flags;
2566
2567         spin_lock_irqsave(&adapter->lock, flags);
2568         adapter->phy_timer_pending = false;
2569         atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
2570         atl1_write_phy_reg(hw, MII_ATLX_CR, hw->mii_1000t_ctrl_reg);
2571         atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
2572         spin_unlock_irqrestore(&adapter->lock, flags);
2573 }
2574
2575 /*
2576  * Orphaned vendor comment left intact here:
2577  * <vendor comment>
2578  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
2579  * will assert. We do soft reset <0x1400=1> according
2580  * with the SPEC. BUT, it seemes that PCIE or DMA
2581  * state-machine will not be reset. DMAR_TO_INT will
2582  * assert again and again.
2583  * </vendor comment>
2584  */
2585
2586 static int atl1_reset(struct atl1_adapter *adapter)
2587 {
2588         int ret;
2589         ret = atl1_reset_hw(&adapter->hw);
2590         if (ret)
2591                 return ret;
2592         return atl1_init_hw(&adapter->hw);
2593 }
2594
2595 static s32 atl1_up(struct atl1_adapter *adapter)
2596 {
2597         struct net_device *netdev = adapter->netdev;
2598         int err;
2599         int irq_flags = IRQF_SAMPLE_RANDOM;
2600
2601         /* hardware has been reset, we need to reload some things */
2602         atlx_set_multi(netdev);
2603         atl1_init_ring_ptrs(adapter);
2604         atlx_restore_vlan(adapter);
2605         err = atl1_alloc_rx_buffers(adapter);
2606         if (unlikely(!err))
2607                 /* no RX BUFFER allocated */
2608                 return -ENOMEM;
2609
2610         if (unlikely(atl1_configure(adapter))) {
2611                 err = -EIO;
2612                 goto err_up;
2613         }
2614
2615         err = pci_enable_msi(adapter->pdev);
2616         if (err) {
2617                 if (netif_msg_ifup(adapter))
2618                         dev_info(&adapter->pdev->dev,
2619                                 "Unable to enable MSI: %d\n", err);
2620                 irq_flags |= IRQF_SHARED;
2621         }
2622
2623         err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
2624                         netdev->name, netdev);
2625         if (unlikely(err))
2626                 goto err_up;
2627
2628         mod_timer(&adapter->watchdog_timer, jiffies);
2629         atlx_irq_enable(adapter);
2630         atl1_check_link(adapter);
2631         netif_start_queue(netdev);
2632         return 0;
2633
2634 err_up:
2635         pci_disable_msi(adapter->pdev);
2636         /* free rx_buffers */
2637         atl1_clean_rx_ring(adapter);
2638         return err;
2639 }
2640
2641 static void atl1_down(struct atl1_adapter *adapter)
2642 {
2643         struct net_device *netdev = adapter->netdev;
2644
2645         del_timer_sync(&adapter->watchdog_timer);
2646         del_timer_sync(&adapter->phy_config_timer);
2647         adapter->phy_timer_pending = false;
2648
2649         atlx_irq_disable(adapter);
2650         free_irq(adapter->pdev->irq, netdev);
2651         pci_disable_msi(adapter->pdev);
2652         atl1_reset_hw(&adapter->hw);
2653         adapter->cmb.cmb->int_stats = 0;
2654
2655         adapter->link_speed = SPEED_0;
2656         adapter->link_duplex = -1;
2657         netif_carrier_off(netdev);
2658         netif_stop_queue(netdev);
2659
2660         atl1_clean_tx_ring(adapter);
2661         atl1_clean_rx_ring(adapter);
2662 }
2663
2664 static void atl1_tx_timeout_task(struct work_struct *work)
2665 {
2666         struct atl1_adapter *adapter =
2667                 container_of(work, struct atl1_adapter, tx_timeout_task);
2668         struct net_device *netdev = adapter->netdev;
2669
2670         netif_device_detach(netdev);
2671         atl1_down(adapter);
2672         atl1_up(adapter);
2673         netif_device_attach(netdev);
2674 }
2675
2676 /*
2677  * atl1_change_mtu - Change the Maximum Transfer Unit
2678  * @netdev: network interface device structure
2679  * @new_mtu: new value for maximum frame size
2680  *
2681  * Returns 0 on success, negative on failure
2682  */
2683 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
2684 {
2685         struct atl1_adapter *adapter = netdev_priv(netdev);
2686         int old_mtu = netdev->mtu;
2687         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
2688
2689         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2690             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2691                 if (netif_msg_link(adapter))
2692                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
2693                 return -EINVAL;
2694         }
2695
2696         adapter->hw.max_frame_size = max_frame;
2697         adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
2698         adapter->rx_buffer_len = (max_frame + 7) & ~7;
2699         adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
2700
2701         netdev->mtu = new_mtu;
2702         if ((old_mtu != new_mtu) && netif_running(netdev)) {
2703                 atl1_down(adapter);
2704                 atl1_up(adapter);
2705         }
2706
2707         return 0;
2708 }
2709
2710 /*
2711  * atl1_open - Called when a network interface is made active
2712  * @netdev: network interface device structure
2713  *
2714  * Returns 0 on success, negative value on failure
2715  *
2716  * The open entry point is called when a network interface is made
2717  * active by the system (IFF_UP).  At this point all resources needed
2718  * for transmit and receive operations are allocated, the interrupt
2719  * handler is registered with the OS, the watchdog timer is started,
2720  * and the stack is notified that the interface is ready.
2721  */
2722 static int atl1_open(struct net_device *netdev)
2723 {
2724         struct atl1_adapter *adapter = netdev_priv(netdev);
2725         int err;
2726
2727         /* allocate transmit descriptors */
2728         err = atl1_setup_ring_resources(adapter);
2729         if (err)
2730                 return err;
2731
2732         err = atl1_up(adapter);
2733         if (err)
2734                 goto err_up;
2735
2736         return 0;
2737
2738 err_up:
2739         atl1_reset(adapter);
2740         return err;
2741 }
2742
2743 /*
2744  * atl1_close - Disables a network interface
2745  * @netdev: network interface device structure
2746  *
2747  * Returns 0, this is not allowed to fail
2748  *
2749  * The close entry point is called when an interface is de-activated
2750  * by the OS.  The hardware is still under the drivers control, but
2751  * needs to be disabled.  A global MAC reset is issued to stop the
2752  * hardware, and all transmit and receive resources are freed.
2753  */
2754 static int atl1_close(struct net_device *netdev)
2755 {
2756         struct atl1_adapter *adapter = netdev_priv(netdev);
2757         atl1_down(adapter);
2758         atl1_free_ring_resources(adapter);
2759         return 0;
2760 }
2761
2762 #ifdef CONFIG_PM
2763 static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
2764 {
2765         struct net_device *netdev = pci_get_drvdata(pdev);
2766         struct atl1_adapter *adapter = netdev_priv(netdev);
2767         struct atl1_hw *hw = &adapter->hw;
2768         u32 ctrl = 0;
2769         u32 wufc = adapter->wol;
2770         u32 val;
2771         int retval;
2772         u16 speed;
2773         u16 duplex;
2774
2775         netif_device_detach(netdev);
2776         if (netif_running(netdev))
2777                 atl1_down(adapter);
2778
2779         retval = pci_save_state(pdev);
2780         if (retval)
2781                 return retval;
2782
2783         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2784         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2785         val = ctrl & BMSR_LSTATUS;
2786         if (val)
2787                 wufc &= ~ATLX_WUFC_LNKC;
2788
2789         if (val && wufc) {
2790                 val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
2791                 if (val) {
2792                         if (netif_msg_ifdown(adapter))
2793                                 dev_printk(KERN_DEBUG, &pdev->dev,
2794                                         "error getting speed/duplex\n");
2795                         goto disable_wol;
2796                 }
2797
2798                 ctrl = 0;
2799
2800                 /* enable magic packet WOL */
2801                 if (wufc & ATLX_WUFC_MAG)
2802                         ctrl |= (WOL_MAGIC_EN | WOL_MAGIC_PME_EN);
2803                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2804                 ioread32(hw->hw_addr + REG_WOL_CTRL);
2805
2806                 /* configure the mac */
2807                 ctrl = MAC_CTRL_RX_EN;
2808                 ctrl |= ((u32)((speed == SPEED_1000) ? MAC_CTRL_SPEED_1000 :
2809                         MAC_CTRL_SPEED_10_100) << MAC_CTRL_SPEED_SHIFT);
2810                 if (duplex == FULL_DUPLEX)
2811                         ctrl |= MAC_CTRL_DUPLX;
2812                 ctrl |= (((u32)adapter->hw.preamble_len &
2813                         MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
2814                 if (adapter->vlgrp)
2815                         ctrl |= MAC_CTRL_RMV_VLAN;
2816                 if (wufc & ATLX_WUFC_MAG)
2817                         ctrl |= MAC_CTRL_BC_EN;
2818                 iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2819                 ioread32(hw->hw_addr + REG_MAC_CTRL);
2820
2821                 /* poke the PHY */
2822                 ctrl = ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2823                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2824                 iowrite32(ctrl, hw->hw_addr + REG_PCIE_PHYMISC);
2825                 ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2826
2827                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2828                 goto exit;
2829         }
2830
2831         if (!val && wufc) {
2832                 ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2833                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2834                 ioread32(hw->hw_addr + REG_WOL_CTRL);
2835                 iowrite32(0, hw->hw_addr + REG_MAC_CTRL);
2836                 ioread32(hw->hw_addr + REG_MAC_CTRL);
2837                 hw->phy_configured = false;
2838                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2839                 goto exit;
2840         }
2841
2842 disable_wol:
2843         iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2844         ioread32(hw->hw_addr + REG_WOL_CTRL);
2845         ctrl = ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2846         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2847         iowrite32(ctrl, hw->hw_addr + REG_PCIE_PHYMISC);
2848         ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2849         hw->phy_configured = false;
2850         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2851 exit:
2852         if (netif_running(netdev))
2853                 pci_disable_msi(adapter->pdev);
2854         pci_disable_device(pdev);
2855         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2856
2857         return 0;
2858 }
2859
2860 static int atl1_resume(struct pci_dev *pdev)
2861 {
2862         struct net_device *netdev = pci_get_drvdata(pdev);
2863         struct atl1_adapter *adapter = netdev_priv(netdev);
2864         u32 err;
2865
2866         pci_set_power_state(pdev, PCI_D0);
2867         pci_restore_state(pdev);
2868
2869         err = pci_enable_device(pdev);
2870         if (err) {
2871                 if (netif_msg_ifup(adapter))
2872                         dev_printk(KERN_DEBUG, &pdev->dev,
2873                                 "error enabling pci device\n");
2874                 return err;
2875         }
2876
2877         pci_set_master(pdev);
2878         iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2879         pci_enable_wake(pdev, PCI_D3hot, 0);
2880         pci_enable_wake(pdev, PCI_D3cold, 0);
2881
2882         atl1_reset_hw(&adapter->hw);
2883         adapter->cmb.cmb->int_stats = 0;
2884
2885         if (netif_running(netdev))
2886                 atl1_up(adapter);
2887         netif_device_attach(netdev);
2888
2889         return 0;
2890 }
2891 #else
2892 #define atl1_suspend NULL
2893 #define atl1_resume NULL
2894 #endif
2895
2896 static void atl1_shutdown(struct pci_dev *pdev)
2897 {
2898 #ifdef CONFIG_PM
2899         atl1_suspend(pdev, PMSG_SUSPEND);
2900 #endif
2901 }
2902
2903 #ifdef CONFIG_NET_POLL_CONTROLLER
2904 static void atl1_poll_controller(struct net_device *netdev)
2905 {
2906         disable_irq(netdev->irq);
2907         atl1_intr(netdev->irq, netdev);
2908         enable_irq(netdev->irq);
2909 }
2910 #endif
2911
2912 /*
2913  * atl1_probe - Device Initialization Routine
2914  * @pdev: PCI device information struct
2915  * @ent: entry in atl1_pci_tbl
2916  *
2917  * Returns 0 on success, negative on failure
2918  *
2919  * atl1_probe initializes an adapter identified by a pci_dev structure.
2920  * The OS initialization, configuring of the adapter private structure,
2921  * and a hardware reset occur.
2922  */
2923 static int __devinit atl1_probe(struct pci_dev *pdev,
2924         const struct pci_device_id *ent)
2925 {
2926         struct net_device *netdev;
2927         struct atl1_adapter *adapter;
2928         static int cards_found = 0;
2929         int err;
2930
2931         err = pci_enable_device(pdev);
2932         if (err)
2933                 return err;
2934
2935         /*
2936          * The atl1 chip can DMA to 64-bit addresses, but it uses a single
2937          * shared register for the high 32 bits, so only a single, aligned,
2938          * 4 GB physical address range can be used at a time.
2939          *
2940          * Supporting 64-bit DMA on this hardware is more trouble than it's
2941          * worth.  It is far easier to limit to 32-bit DMA than update
2942          * various kernel subsystems to support the mechanics required by a
2943          * fixed-high-32-bit system.
2944          */
2945         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2946         if (err) {
2947                 dev_err(&pdev->dev, "no usable DMA configuration\n");
2948                 goto err_dma;
2949         }
2950         /*
2951          * Mark all PCI regions associated with PCI device
2952          * pdev as being reserved by owner atl1_driver_name
2953          */
2954         err = pci_request_regions(pdev, ATLX_DRIVER_NAME);
2955         if (err)
2956                 goto err_request_regions;
2957
2958         /*
2959          * Enables bus-mastering on the device and calls
2960          * pcibios_set_master to do the needed arch specific settings
2961          */
2962         pci_set_master(pdev);
2963
2964         netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2965         if (!netdev) {
2966                 err = -ENOMEM;
2967                 goto err_alloc_etherdev;
2968         }
2969         SET_NETDEV_DEV(netdev, &pdev->dev);
2970
2971         pci_set_drvdata(pdev, netdev);
2972         adapter = netdev_priv(netdev);
2973         adapter->netdev = netdev;
2974         adapter->pdev = pdev;
2975         adapter->hw.back = adapter;
2976         adapter->msg_enable = netif_msg_init(debug, atl1_default_msg);
2977
2978         adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2979         if (!adapter->hw.hw_addr) {
2980                 err = -EIO;
2981                 goto err_pci_iomap;
2982         }
2983         /* get device revision number */
2984         adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
2985                 (REG_MASTER_CTRL + 2));
2986         if (netif_msg_probe(adapter))
2987                 dev_info(&pdev->dev, "version %s\n", ATLX_DRIVER_VERSION);
2988
2989         /* set default ring resource counts */
2990         adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2991         adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2992
2993         adapter->mii.dev = netdev;
2994         adapter->mii.mdio_read = mdio_read;
2995         adapter->mii.mdio_write = mdio_write;
2996         adapter->mii.phy_id_mask = 0x1f;
2997         adapter->mii.reg_num_mask = 0x1f;
2998
2999         netdev->open = &atl1_open;
3000         netdev->stop = &atl1_close;
3001         netdev->hard_start_xmit = &atl1_xmit_frame;
3002         netdev->get_stats = &atlx_get_stats;
3003         netdev->set_multicast_list = &atlx_set_multi;
3004         netdev->set_mac_address = &atl1_set_mac;
3005         netdev->change_mtu = &atl1_change_mtu;
3006         netdev->do_ioctl = &atlx_ioctl;
3007         netdev->tx_timeout = &atlx_tx_timeout;
3008         netdev->watchdog_timeo = 5 * HZ;
3009 #ifdef CONFIG_NET_POLL_CONTROLLER
3010         netdev->poll_controller = atl1_poll_controller;
3011 #endif
3012         netdev->vlan_rx_register = atlx_vlan_rx_register;
3013
3014         netdev->ethtool_ops = &atl1_ethtool_ops;
3015         adapter->bd_number = cards_found;
3016
3017         /* setup the private structure */
3018         err = atl1_sw_init(adapter);
3019         if (err)
3020                 goto err_common;
3021
3022         netdev->features = NETIF_F_HW_CSUM;
3023         netdev->features |= NETIF_F_SG;
3024         netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
3025         netdev->features |= NETIF_F_LLTX;
3026
3027         /*
3028          * patch for some L1 of old version,
3029          * the final version of L1 may not need these
3030          * patches
3031          */
3032         /* atl1_pcie_patch(adapter); */
3033
3034         /* really reset GPHY core */
3035         iowrite16(0, adapter->hw.hw_addr + REG_PHY_ENABLE);
3036
3037         /*
3038          * reset the controller to
3039          * put the device in a known good starting state
3040          */
3041         if (atl1_reset_hw(&adapter->hw)) {
3042                 err = -EIO;
3043                 goto err_common;
3044         }
3045
3046         /* copy the MAC address out of the EEPROM */
3047         atl1_read_mac_addr(&adapter->hw);
3048         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
3049
3050         if (!is_valid_ether_addr(netdev->dev_addr)) {
3051                 err = -EIO;
3052                 goto err_common;
3053         }
3054
3055         atl1_check_options(adapter);
3056
3057         /* pre-init the MAC, and setup link */
3058         err = atl1_init_hw(&adapter->hw);
3059         if (err) {
3060                 err = -EIO;
3061                 goto err_common;
3062         }
3063
3064         atl1_pcie_patch(adapter);
3065         /* assume we have no link for now */
3066         netif_carrier_off(netdev);
3067         netif_stop_queue(netdev);
3068
3069         init_timer(&adapter->watchdog_timer);
3070         adapter->watchdog_timer.function = &atl1_watchdog;
3071         adapter->watchdog_timer.data = (unsigned long)adapter;
3072
3073         init_timer(&adapter->phy_config_timer);
3074         adapter->phy_config_timer.function = &atl1_phy_config;
3075         adapter->phy_config_timer.data = (unsigned long)adapter;
3076         adapter->phy_timer_pending = false;
3077
3078         INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);
3079
3080         INIT_WORK(&adapter->link_chg_task, atlx_link_chg_task);
3081
3082         INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);
3083
3084         err = register_netdev(netdev);
3085         if (err)
3086                 goto err_common;
3087
3088         cards_found++;
3089         atl1_via_workaround(adapter);
3090         return 0;
3091
3092 err_common:
3093         pci_iounmap(pdev, adapter->hw.hw_addr);
3094 err_pci_iomap:
3095         free_netdev(netdev);
3096 err_alloc_etherdev:
3097         pci_release_regions(pdev);
3098 err_dma:
3099 err_request_regions:
3100         pci_disable_device(pdev);
3101         return err;
3102 }
3103
3104 /*
3105  * atl1_remove - Device Removal Routine
3106  * @pdev: PCI device information struct
3107  *
3108  * atl1_remove is called by the PCI subsystem to alert the driver
3109  * that it should release a PCI device.  The could be caused by a
3110  * Hot-Plug event, or because the driver is going to be removed from
3111  * memory.
3112  */
3113 static void __devexit atl1_remove(struct pci_dev *pdev)
3114 {
3115         struct net_device *netdev = pci_get_drvdata(pdev);
3116         struct atl1_adapter *adapter;
3117         /* Device not available. Return. */
3118         if (!netdev)
3119                 return;
3120
3121         adapter = netdev_priv(netdev);
3122
3123         /*
3124          * Some atl1 boards lack persistent storage for their MAC, and get it
3125          * from the BIOS during POST.  If we've been messing with the MAC
3126          * address, we need to save the permanent one.
3127          */
3128         if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
3129                 memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr,
3130                         ETH_ALEN);
3131                 atl1_set_mac_addr(&adapter->hw);
3132         }
3133
3134         iowrite16(0, adapter->hw.hw_addr + REG_PHY_ENABLE);
3135         unregister_netdev(netdev);
3136         pci_iounmap(pdev, adapter->hw.hw_addr);
3137         pci_release_regions(pdev);
3138         free_netdev(netdev);
3139         pci_disable_device(pdev);
3140 }
3141
3142 static struct pci_driver atl1_driver = {
3143         .name = ATLX_DRIVER_NAME,
3144         .id_table = atl1_pci_tbl,
3145         .probe = atl1_probe,
3146         .remove = __devexit_p(atl1_remove),
3147         .suspend = atl1_suspend,
3148         .resume = atl1_resume,
3149         .shutdown = atl1_shutdown
3150 };
3151
3152 /*
3153  * atl1_exit_module - Driver Exit Cleanup Routine
3154  *
3155  * atl1_exit_module is called just before the driver is removed
3156  * from memory.
3157  */
3158 static void __exit atl1_exit_module(void)
3159 {
3160         pci_unregister_driver(&atl1_driver);
3161 }
3162
3163 /*
3164  * atl1_init_module - Driver Registration Routine
3165  *
3166  * atl1_init_module is the first routine called when the driver is
3167  * loaded. All it does is register with the PCI subsystem.
3168  */
3169 static int __init atl1_init_module(void)
3170 {
3171         return pci_register_driver(&atl1_driver);
3172 }
3173
3174 module_init(atl1_init_module);
3175 module_exit(atl1_exit_module);
3176
3177 struct atl1_stats {
3178         char stat_string[ETH_GSTRING_LEN];
3179         int sizeof_stat;
3180         int stat_offset;
3181 };
3182
3183 #define ATL1_STAT(m) \
3184         sizeof(((struct atl1_adapter *)0)->m), offsetof(struct atl1_adapter, m)
3185
3186 static struct atl1_stats atl1_gstrings_stats[] = {
3187         {"rx_packets", ATL1_STAT(soft_stats.rx_packets)},
3188         {"tx_packets", ATL1_STAT(soft_stats.tx_packets)},
3189         {"rx_bytes", ATL1_STAT(soft_stats.rx_bytes)},
3190         {"tx_bytes", ATL1_STAT(soft_stats.tx_bytes)},
3191         {"rx_errors", ATL1_STAT(soft_stats.rx_errors)},
3192         {"tx_errors", ATL1_STAT(soft_stats.tx_errors)},
3193         {"rx_dropped", ATL1_STAT(net_stats.rx_dropped)},
3194         {"tx_dropped", ATL1_STAT(net_stats.tx_dropped)},
3195         {"multicast", ATL1_STAT(soft_stats.multicast)},
3196         {"collisions", ATL1_STAT(soft_stats.collisions)},
3197         {"rx_length_errors", ATL1_STAT(soft_stats.rx_length_errors)},
3198         {"rx_over_errors", ATL1_STAT(soft_stats.rx_missed_errors)},
3199         {"rx_crc_errors", ATL1_STAT(soft_stats.rx_crc_errors)},
3200         {"rx_frame_errors", ATL1_STAT(soft_stats.rx_frame_errors)},
3201         {"rx_fifo_errors", ATL1_STAT(soft_stats.rx_fifo_errors)},
3202         {"rx_missed_errors", ATL1_STAT(soft_stats.rx_missed_errors)},
3203         {"tx_aborted_errors", ATL1_STAT(soft_stats.tx_aborted_errors)},
3204         {"tx_carrier_errors", ATL1_STAT(soft_stats.tx_carrier_errors)},
3205         {"tx_fifo_errors", ATL1_STAT(soft_stats.tx_fifo_errors)},
3206         {"tx_window_errors", ATL1_STAT(soft_stats.tx_window_errors)},
3207         {"tx_abort_exce_coll", ATL1_STAT(soft_stats.excecol)},
3208         {"tx_abort_late_coll", ATL1_STAT(soft_stats.latecol)},
3209         {"tx_deferred_ok", ATL1_STAT(soft_stats.deffer)},
3210         {"tx_single_coll_ok", ATL1_STAT(soft_stats.scc)},
3211         {"tx_multi_coll_ok", ATL1_STAT(soft_stats.mcc)},
3212         {"tx_underun", ATL1_STAT(soft_stats.tx_underun)},
3213         {"tx_trunc", ATL1_STAT(soft_stats.tx_trunc)},
3214         {"tx_pause", ATL1_STAT(soft_stats.tx_pause)},
3215         {"rx_pause", ATL1_STAT(soft_stats.rx_pause)},
3216         {"rx_rrd_ov", ATL1_STAT(soft_stats.rx_rrd_ov)},
3217         {"rx_trunc", ATL1_STAT(soft_stats.rx_trunc)}
3218 };
3219
3220 static void atl1_get_ethtool_stats(struct net_device *netdev,
3221         struct ethtool_stats *stats, u64 *data)
3222 {
3223         struct atl1_adapter *adapter = netdev_priv(netdev);
3224         int i;
3225         char *p;
3226
3227         for (i = 0; i < ARRAY_SIZE(atl1_gstrings_stats); i++) {
3228                 p = (char *)adapter+atl1_gstrings_stats[i].stat_offset;
3229                 data[i] = (atl1_gstrings_stats[i].sizeof_stat ==
3230                         sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
3231         }
3232
3233 }
3234
3235 static int atl1_get_sset_count(struct net_device *netdev, int sset)
3236 {
3237         switch (sset) {
3238         case ETH_SS_STATS:
3239                 return ARRAY_SIZE(atl1_gstrings_stats);
3240         default:
3241                 return -EOPNOTSUPP;
3242         }
3243 }
3244
3245 static int atl1_get_settings(struct net_device *netdev,
3246         struct ethtool_cmd *ecmd)
3247 {
3248         struct atl1_adapter *adapter = netdev_priv(netdev);
3249         struct atl1_hw *hw = &adapter->hw;
3250
3251         ecmd->supported = (SUPPORTED_10baseT_Half |
3252                            SUPPORTED_10baseT_Full |
3253                            SUPPORTED_100baseT_Half |
3254                            SUPPORTED_100baseT_Full |
3255                            SUPPORTED_1000baseT_Full |
3256                            SUPPORTED_Autoneg | SUPPORTED_TP);
3257         ecmd->advertising = ADVERTISED_TP;
3258         if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3259             hw->media_type == MEDIA_TYPE_1000M_FULL) {
3260                 ecmd->advertising |= ADVERTISED_Autoneg;
3261                 if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR) {
3262                         ecmd->advertising |= ADVERTISED_Autoneg;
3263                         ecmd->advertising |=
3264                             (ADVERTISED_10baseT_Half |
3265                              ADVERTISED_10baseT_Full |
3266                              ADVERTISED_100baseT_Half |
3267                              ADVERTISED_100baseT_Full |
3268                              ADVERTISED_1000baseT_Full);
3269                 } else
3270                         ecmd->advertising |= (ADVERTISED_1000baseT_Full);
3271         }
3272         ecmd->port = PORT_TP;
3273         ecmd->phy_address = 0;
3274         ecmd->transceiver = XCVR_INTERNAL;
3275
3276         if (netif_carrier_ok(adapter->netdev)) {
3277                 u16 link_speed, link_duplex;
3278                 atl1_get_speed_and_duplex(hw, &link_speed, &link_duplex);
3279                 ecmd->speed = link_speed;
3280                 if (link_duplex == FULL_DUPLEX)
3281                         ecmd->duplex = DUPLEX_FULL;
3282                 else
3283                         ecmd->duplex = DUPLEX_HALF;
3284         } else {
3285                 ecmd->speed = -1;
3286                 ecmd->duplex = -1;
3287         }
3288         if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3289             hw->media_type == MEDIA_TYPE_1000M_FULL)
3290                 ecmd->autoneg = AUTONEG_ENABLE;
3291         else
3292                 ecmd->autoneg = AUTONEG_DISABLE;
3293
3294         return 0;
3295 }
3296
3297 static int atl1_set_settings(struct net_device *netdev,
3298         struct ethtool_cmd *ecmd)
3299 {
3300         struct atl1_adapter *adapter = netdev_priv(netdev);
3301         struct atl1_hw *hw = &adapter->hw;
3302         u16 phy_data;
3303         int ret_val = 0;
3304         u16 old_media_type = hw->media_type;
3305
3306         if (netif_running(adapter->netdev)) {
3307                 if (netif_msg_link(adapter))
3308                         dev_dbg(&adapter->pdev->dev,
3309                                 "ethtool shutting down adapter\n");
3310                 atl1_down(adapter);
3311         }
3312
3313         if (ecmd->autoneg == AUTONEG_ENABLE)
3314                 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
3315         else {
3316                 if (ecmd->speed == SPEED_1000) {
3317                         if (ecmd->duplex != DUPLEX_FULL) {
3318                                 if (netif_msg_link(adapter))
3319                                         dev_warn(&adapter->pdev->dev,
3320                                                 "1000M half is invalid\n");
3321                                 ret_val = -EINVAL;
3322                                 goto exit_sset;
3323                         }
3324                         hw->media_type = MEDIA_TYPE_1000M_FULL;
3325                 } else if (ecmd->speed == SPEED_100) {
3326                         if (ecmd->duplex == DUPLEX_FULL)
3327                                 hw->media_type = MEDIA_TYPE_100M_FULL;
3328                         else
3329                                 hw->media_type = MEDIA_TYPE_100M_HALF;
3330                 } else {
3331                         if (ecmd->duplex == DUPLEX_FULL)
3332                                 hw->media_type = MEDIA_TYPE_10M_FULL;
3333                         else
3334                                 hw->media_type = MEDIA_TYPE_10M_HALF;
3335                 }
3336         }
3337         switch (hw->media_type) {
3338         case MEDIA_TYPE_AUTO_SENSOR:
3339                 ecmd->advertising =
3340                     ADVERTISED_10baseT_Half |
3341                     ADVERTISED_10baseT_Full |
3342                     ADVERTISED_100baseT_Half |
3343                     ADVERTISED_100baseT_Full |
3344                     ADVERTISED_1000baseT_Full |
3345                     ADVERTISED_Autoneg | ADVERTISED_TP;
3346                 break;
3347         case MEDIA_TYPE_1000M_FULL:
3348                 ecmd->advertising =
3349                     ADVERTISED_1000baseT_Full |
3350                     ADVERTISED_Autoneg | ADVERTISED_TP;
3351                 break;
3352         default:
3353                 ecmd->advertising = 0;
3354                 break;
3355         }
3356         if (atl1_phy_setup_autoneg_adv(hw)) {
3357                 ret_val = -EINVAL;
3358                 if (netif_msg_link(adapter))
3359                         dev_warn(&adapter->pdev->dev,
3360                                 "invalid ethtool speed/duplex setting\n");
3361                 goto exit_sset;
3362         }
3363         if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3364             hw->media_type == MEDIA_TYPE_1000M_FULL)
3365                 phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
3366         else {
3367                 switch (hw->media_type) {
3368                 case MEDIA_TYPE_100M_FULL:
3369                         phy_data =
3370                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
3371                             MII_CR_RESET;
3372                         break;
3373                 case MEDIA_TYPE_100M_HALF:
3374                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
3375                         break;
3376                 case MEDIA_TYPE_10M_FULL:
3377                         phy_data =
3378                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
3379                         break;
3380                 default:
3381                         /* MEDIA_TYPE_10M_HALF: */
3382                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
3383                         break;
3384                 }
3385         }
3386         atl1_write_phy_reg(hw, MII_BMCR, phy_data);
3387 exit_sset:
3388         if (ret_val)
3389                 hw->media_type = old_media_type;
3390
3391         if (netif_running(adapter->netdev)) {
3392                 if (netif_msg_link(adapter))
3393                         dev_dbg(&adapter->pdev->dev,
3394                                 "ethtool starting adapter\n");
3395                 atl1_up(adapter);
3396         } else if (!ret_val) {
3397                 if (netif_msg_link(adapter))
3398                         dev_dbg(&adapter->pdev->dev,
3399                                 "ethtool resetting adapter\n");
3400                 atl1_reset(adapter);
3401         }
3402         return ret_val;
3403 }
3404
3405 static void atl1_get_drvinfo(struct net_device *netdev,
3406         struct ethtool_drvinfo *drvinfo)
3407 {
3408         struct atl1_adapter *adapter = netdev_priv(netdev);
3409
3410         strncpy(drvinfo->driver, ATLX_DRIVER_NAME, sizeof(drvinfo->driver));
3411         strncpy(drvinfo->version, ATLX_DRIVER_VERSION,
3412                 sizeof(drvinfo->version));
3413         strncpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
3414         strncpy(drvinfo->bus_info, pci_name(adapter->pdev),
3415                 sizeof(drvinfo->bus_info));
3416         drvinfo->eedump_len = ATL1_EEDUMP_LEN;
3417 }
3418
3419 static void atl1_get_wol(struct net_device *netdev,
3420         struct ethtool_wolinfo *wol)
3421 {
3422         struct atl1_adapter *adapter = netdev_priv(netdev);
3423
3424         wol->supported = WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_MAGIC;
3425         wol->wolopts = 0;
3426         if (adapter->wol & ATLX_WUFC_EX)
3427                 wol->wolopts |= WAKE_UCAST;
3428         if (adapter->wol & ATLX_WUFC_MC)
3429                 wol->wolopts |= WAKE_MCAST;
3430         if (adapter->wol & ATLX_WUFC_BC)
3431                 wol->wolopts |= WAKE_BCAST;
3432         if (adapter->wol & ATLX_WUFC_MAG)
3433                 wol->wolopts |= WAKE_MAGIC;
3434         return;
3435 }
3436
3437 static int atl1_set_wol(struct net_device *netdev,
3438         struct ethtool_wolinfo *wol)
3439 {
3440         struct atl1_adapter *adapter = netdev_priv(netdev);
3441
3442         if (wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE))
3443                 return -EOPNOTSUPP;
3444         adapter->wol = 0;
3445         if (wol->wolopts & WAKE_UCAST)
3446                 adapter->wol |= ATLX_WUFC_EX;
3447         if (wol->wolopts & WAKE_MCAST)
3448                 adapter->wol |= ATLX_WUFC_MC;
3449         if (wol->wolopts & WAKE_BCAST)
3450                 adapter->wol |= ATLX_WUFC_BC;
3451         if (wol->wolopts & WAKE_MAGIC)
3452                 adapter->wol |= ATLX_WUFC_MAG;
3453         return 0;
3454 }
3455
3456 static u32 atl1_get_msglevel(struct net_device *netdev)
3457 {
3458         struct atl1_adapter *adapter = netdev_priv(netdev);
3459         return adapter->msg_enable;
3460 }
3461
3462 static void atl1_set_msglevel(struct net_device *netdev, u32 value)
3463 {
3464         struct atl1_adapter *adapter = netdev_priv(netdev);
3465         adapter->msg_enable = value;
3466 }
3467
3468 static int atl1_get_regs_len(struct net_device *netdev)
3469 {
3470         return ATL1_REG_COUNT * sizeof(u32);
3471 }
3472
3473 static void atl1_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
3474         void *p)
3475 {
3476         struct atl1_adapter *adapter = netdev_priv(netdev);
3477         struct atl1_hw *hw = &adapter->hw;
3478         unsigned int i;
3479         u32 *regbuf = p;
3480
3481         for (i = 0; i < ATL1_REG_COUNT; i++) {
3482                 /*
3483                  * This switch statement avoids reserved regions
3484                  * of register space.
3485                  */
3486                 switch (i) {
3487                 case 6 ... 9:
3488                 case 14:
3489                 case 29 ... 31:
3490                 case 34 ... 63:
3491                 case 75 ... 127:
3492                 case 136 ... 1023:
3493                 case 1027 ... 1087:
3494                 case 1091 ... 1151:
3495                 case 1194 ... 1195:
3496                 case 1200 ... 1201:
3497                 case 1206 ... 1213:
3498                 case 1216 ... 1279:
3499                 case 1290 ... 1311:
3500                 case 1323 ... 1343:
3501                 case 1358 ... 1359:
3502                 case 1368 ... 1375:
3503                 case 1378 ... 1383:
3504                 case 1388 ... 1391:
3505                 case 1393 ... 1395:
3506                 case 1402 ... 1403:
3507                 case 1410 ... 1471:
3508                 case 1522 ... 1535:
3509                         /* reserved region; don't read it */
3510                         regbuf[i] = 0;
3511                         break;
3512                 default:
3513                         /* unreserved region */
3514                         regbuf[i] = ioread32(hw->hw_addr + (i * sizeof(u32)));
3515                 }
3516         }
3517 }
3518
3519 static void atl1_get_ringparam(struct net_device *netdev,
3520         struct ethtool_ringparam *ring)
3521 {
3522         struct atl1_adapter *adapter = netdev_priv(netdev);
3523         struct atl1_tpd_ring *txdr = &adapter->tpd_ring;
3524         struct atl1_rfd_ring *rxdr = &adapter->rfd_ring;
3525
3526         ring->rx_max_pending = ATL1_MAX_RFD;
3527         ring->tx_max_pending = ATL1_MAX_TPD;
3528         ring->rx_mini_max_pending = 0;
3529         ring->rx_jumbo_max_pending = 0;
3530         ring->rx_pending = rxdr->count;
3531         ring->tx_pending = txdr->count;
3532         ring->rx_mini_pending = 0;
3533         ring->rx_jumbo_pending = 0;
3534 }
3535
3536 static int atl1_set_ringparam(struct net_device *netdev,
3537         struct ethtool_ringparam *ring)
3538 {
3539         struct atl1_adapter *adapter = netdev_priv(netdev);
3540         struct atl1_tpd_ring *tpdr = &adapter->tpd_ring;
3541         struct atl1_rrd_ring *rrdr = &adapter->rrd_ring;
3542         struct atl1_rfd_ring *rfdr = &adapter->rfd_ring;
3543
3544         struct atl1_tpd_ring tpd_old, tpd_new;
3545         struct atl1_rfd_ring rfd_old, rfd_new;
3546         struct atl1_rrd_ring rrd_old, rrd_new;
3547         struct atl1_ring_header rhdr_old, rhdr_new;
3548         int err;
3549
3550         tpd_old = adapter->tpd_ring;
3551         rfd_old = adapter->rfd_ring;
3552         rrd_old = adapter->rrd_ring;
3553         rhdr_old = adapter->ring_header;
3554
3555         if (netif_running(adapter->netdev))
3556                 atl1_down(adapter);
3557
3558         rfdr->count = (u16) max(ring->rx_pending, (u32) ATL1_MIN_RFD);
3559         rfdr->count = rfdr->count > ATL1_MAX_RFD ? ATL1_MAX_RFD :
3560                         rfdr->count;
3561         rfdr->count = (rfdr->count + 3) & ~3;
3562         rrdr->count = rfdr->count;
3563
3564         tpdr->count = (u16) max(ring->tx_pending, (u32) ATL1_MIN_TPD);
3565         tpdr->count = tpdr->count > ATL1_MAX_TPD ? ATL1_MAX_TPD :
3566                         tpdr->count;
3567         tpdr->count = (tpdr->count + 3) & ~3;
3568
3569         if (netif_running(adapter->netdev)) {
3570                 /* try to get new resources before deleting old */
3571                 err = atl1_setup_ring_resources(adapter);
3572                 if (err)
3573                         goto err_setup_ring;
3574
3575                 /*
3576                  * save the new, restore the old in order to free it,
3577                  * then restore the new back again
3578                  */
3579
3580                 rfd_new = adapter->rfd_ring;
3581                 rrd_new = adapter->rrd_ring;
3582                 tpd_new = adapter->tpd_ring;
3583                 rhdr_new = adapter->ring_header;
3584                 adapter->rfd_ring = rfd_old;
3585                 adapter->rrd_ring = rrd_old;
3586                 adapter->tpd_ring = tpd_old;
3587                 adapter->ring_header = rhdr_old;
3588                 atl1_free_ring_resources(adapter);
3589                 adapter->rfd_ring = rfd_new;
3590                 adapter->rrd_ring = rrd_new;
3591                 adapter->tpd_ring = tpd_new;
3592                 adapter->ring_header = rhdr_new;
3593
3594                 err = atl1_up(adapter);
3595                 if (err)
3596                         return err;
3597         }
3598         return 0;
3599
3600 err_setup_ring:
3601         adapter->rfd_ring = rfd_old;
3602         adapter->rrd_ring = rrd_old;
3603         adapter->tpd_ring = tpd_old;
3604         adapter->ring_header = rhdr_old;
3605         atl1_up(adapter);
3606         return err;
3607 }
3608
3609 static void atl1_get_pauseparam(struct net_device *netdev,
3610         struct ethtool_pauseparam *epause)
3611 {
3612         struct atl1_adapter *adapter = netdev_priv(netdev);
3613         struct atl1_hw *hw = &adapter->hw;
3614
3615         if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3616             hw->media_type == MEDIA_TYPE_1000M_FULL) {
3617                 epause->autoneg = AUTONEG_ENABLE;
3618         } else {
3619                 epause->autoneg = AUTONEG_DISABLE;
3620         }
3621         epause->rx_pause = 1;
3622         epause->tx_pause = 1;
3623 }
3624
3625 static int atl1_set_pauseparam(struct net_device *netdev,
3626         struct ethtool_pauseparam *epause)
3627 {
3628         struct atl1_adapter *adapter = netdev_priv(netdev);
3629         struct atl1_hw *hw = &adapter->hw;
3630
3631         if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3632             hw->media_type == MEDIA_TYPE_1000M_FULL) {
3633                 epause->autoneg = AUTONEG_ENABLE;
3634         } else {
3635                 epause->autoneg = AUTONEG_DISABLE;
3636         }
3637
3638         epause->rx_pause = 1;
3639         epause->tx_pause = 1;
3640
3641         return 0;
3642 }
3643
3644 /* FIXME: is this right? -- CHS */
3645 static u32 atl1_get_rx_csum(struct net_device *netdev)
3646 {
3647         return 1;
3648 }
3649
3650 static void atl1_get_strings(struct net_device *netdev, u32 stringset,
3651         u8 *data)
3652 {
3653         u8 *p = data;
3654         int i;
3655
3656         switch (stringset) {
3657         case ETH_SS_STATS:
3658                 for (i = 0; i < ARRAY_SIZE(atl1_gstrings_stats); i++) {
3659                         memcpy(p, atl1_gstrings_stats[i].stat_string,
3660                                 ETH_GSTRING_LEN);
3661                         p += ETH_GSTRING_LEN;
3662                 }
3663                 break;
3664         }
3665 }
3666
3667 static int atl1_nway_reset(struct net_device *netdev)
3668 {
3669         struct atl1_adapter *adapter = netdev_priv(netdev);
3670         struct atl1_hw *hw = &adapter->hw;
3671
3672         if (netif_running(netdev)) {
3673                 u16 phy_data;
3674                 atl1_down(adapter);
3675
3676                 if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3677                         hw->media_type == MEDIA_TYPE_1000M_FULL) {
3678                         phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
3679                 } else {
3680                         switch (hw->media_type) {
3681                         case MEDIA_TYPE_100M_FULL:
3682                                 phy_data = MII_CR_FULL_DUPLEX |
3683                                         MII_CR_SPEED_100 | MII_CR_RESET;
3684                                 break;
3685                         case MEDIA_TYPE_100M_HALF:
3686                                 phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
3687                                 break;
3688                         case MEDIA_TYPE_10M_FULL:
3689                                 phy_data = MII_CR_FULL_DUPLEX |
3690                                         MII_CR_SPEED_10 | MII_CR_RESET;
3691                                 break;
3692                         default:
3693                                 /* MEDIA_TYPE_10M_HALF */
3694                                 phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
3695                         }
3696                 }
3697                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
3698                 atl1_up(adapter);
3699         }
3700         return 0;
3701 }
3702
3703 const struct ethtool_ops atl1_ethtool_ops = {
3704         .get_settings           = atl1_get_settings,
3705         .set_settings           = atl1_set_settings,
3706         .get_drvinfo            = atl1_get_drvinfo,
3707         .get_wol                = atl1_get_wol,
3708         .set_wol                = atl1_set_wol,
3709         .get_msglevel           = atl1_get_msglevel,
3710         .set_msglevel           = atl1_set_msglevel,
3711         .get_regs_len           = atl1_get_regs_len,
3712         .get_regs               = atl1_get_regs,
3713         .get_ringparam          = atl1_get_ringparam,
3714         .set_ringparam          = atl1_set_ringparam,
3715         .get_pauseparam         = atl1_get_pauseparam,
3716         .set_pauseparam         = atl1_set_pauseparam,
3717         .get_rx_csum            = atl1_get_rx_csum,
3718         .set_tx_csum            = ethtool_op_set_tx_hw_csum,
3719         .get_link               = ethtool_op_get_link,
3720         .set_sg                 = ethtool_op_set_sg,
3721         .get_strings            = atl1_get_strings,
3722         .nway_reset             = atl1_nway_reset,
3723         .get_ethtool_stats      = atl1_get_ethtool_stats,
3724         .get_sset_count         = atl1_get_sset_count,
3725         .set_tso                = ethtool_op_set_tso,
3726 };