drivers/net/amd8111e.c

   1
   2 /* Advanced  Micro Devices Inc. AMD8111E Linux Network Driver
   3  * Copyright (C) 2004 Advanced Micro Devices
   4  *
   5  *
   6  * Copyright 2001,2002 Jeff Garzik <jgarzik@mandrakesoft.com> [ 8139cp.c,tg3.c ]
   7  * Copyright (C) 2001, 2002 David S. Miller (davem@redhat.com)[ tg3.c]
   8  * Copyright 1996-1999 Thomas Bogendoerfer [ pcnet32.c ]
   9  * Derived from the lance driver written 1993,1994,1995 by Donald Becker.
  10  * Copyright 1993 United States Government as represented by the
  11  *      Director, National Security Agency.[ pcnet32.c ]
  12  * Carsten Langgaard, carstenl@mips.com [ pcnet32.c ]
  13  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
  14  *
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  29  * USA
  30
  31 Module Name:
  32
  33         amd8111e.c
  34
  35 Abstract:
  36
  37          AMD8111 based 10/100 Ethernet Controller Driver.
  38
  39 Environment:
  40
  41         Kernel Mode
  42
  43 Revision History:
  44         3.0.0
  45            Initial Revision.
  46         3.0.1
  47          1. Dynamic interrupt coalescing.
  48          2. Removed prev_stats.
  49          3. MII support.
  50          4. Dynamic IPG support
  51         3.0.2  05/29/2003
  52          1. Bug fix: Fixed failure to send jumbo packets larger than 4k.
  53          2. Bug fix: Fixed VLAN support failure.
  54          3. Bug fix: Fixed receive interrupt coalescing bug.
  55          4. Dynamic IPG support is disabled by default.
  56         3.0.3 06/05/2003
  57          1. Bug fix: Fixed failure to close the interface if SMP is enabled.
  58         3.0.4 12/09/2003
  59          1. Added set_mac_address routine for bonding driver support.
  60          2. Tested the driver for bonding support
  61          3. Bug fix: Fixed mismach in actual receive buffer lenth and lenth
  62             indicated to the h/w.
  63          4. Modified amd8111e_rx() routine to receive all the received packets
  64             in the first interrupt.
  65          5. Bug fix: Corrected  rx_errors  reported in get_stats() function.
  66         3.0.5 03/22/2004
  67          1. Added NAPI support
  68
  69 */
  70
  71
  72 #include <linux/module.h>
  73 #include <linux/kernel.h>
  74 #include <linux/types.h>
  75 #include <linux/compiler.h>
  76 #include <linux/delay.h>
  77 #include <linux/init.h>
  78 #include <linux/interrupt.h>
  79 #include <linux/ioport.h>
  80 #include <linux/pci.h>
  81 #include <linux/netdevice.h>
  82 #include <linux/etherdevice.h>
  83 #include <linux/skbuff.h>
  84 #include <linux/ethtool.h>
  85 #include <linux/mii.h>
  86 #include <linux/if_vlan.h>
  87 #include <linux/ctype.h>
  88 #include <linux/crc32.h>
  89 #include <linux/dma-mapping.h>
  90
  91 #include <asm/system.h>
  92 #include <asm/io.h>
  93 #include <asm/byteorder.h>
  94 #include <asm/uaccess.h>
  95
  96 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
  97 #define AMD8111E_VLAN_TAG_USED 1
  98 #else
  99 #define AMD8111E_VLAN_TAG_USED 0
 100 #endif
 101
 102 #include "amd8111e.h"
 103 #define MODULE_NAME     "amd8111e"
 104 #define MODULE_VERS     "3.0.7"
 105 MODULE_AUTHOR("Advanced Micro Devices, Inc.");
 106 MODULE_DESCRIPTION ("AMD8111 based 10/100 Ethernet Controller. Driver Version "MODULE_VERS);
 107 MODULE_LICENSE("GPL");
 108 MODULE_DEVICE_TABLE(pci, amd8111e_pci_tbl);
 109 module_param_array(speed_duplex, int, NULL, 0);
 110 MODULE_PARM_DESC(speed_duplex, "Set device speed and duplex modes, 0: Auto Negotiate, 1: 10Mbps Half Duplex, 2: 10Mbps Full Duplex, 3: 100Mbps Half Duplex, 4: 100Mbps Full Duplex");
 111 module_param_array(coalesce, bool, NULL, 0);
 112 MODULE_PARM_DESC(coalesce, "Enable or Disable interrupt coalescing, 1: Enable, 0: Disable");
 113 module_param_array(dynamic_ipg, bool, NULL, 0);
 114 MODULE_PARM_DESC(dynamic_ipg, "Enable or Disable dynamic IPG, 1: Enable, 0: Disable");
 115
 116 static DEFINE_PCI_DEVICE_TABLE(amd8111e_pci_tbl) = {
 117
 118         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD8111E_7462,
 119          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
 120         { 0, }
 121
 122 };
 123 /*
 124 This function will read the PHY registers.
 125 */
 126 static int amd8111e_read_phy(struct amd8111e_priv* lp, int phy_id, int reg, u32* val)
 127 {
 128         void __iomem *mmio = lp->mmio;
 129         unsigned int reg_val;
 130         unsigned int repeat= REPEAT_CNT;
 131
 132         reg_val = readl(mmio + PHY_ACCESS);
 133         while (reg_val & PHY_CMD_ACTIVE)
 134                 reg_val = readl( mmio + PHY_ACCESS );
 135
 136         writel( PHY_RD_CMD | ((phy_id & 0x1f) << 21) |
 137                            ((reg & 0x1f) << 16),  mmio +PHY_ACCESS);
 138         do{
 139                 reg_val = readl(mmio + PHY_ACCESS);
 140                 udelay(30);  /* It takes 30 us to read/write data */
 141         } while (--repeat && (reg_val & PHY_CMD_ACTIVE));
 142         if(reg_val & PHY_RD_ERR)
 143                 goto err_phy_read;
 144
 145         *val = reg_val & 0xffff;
 146         return 0;
 147 err_phy_read:
 148         *val = 0;
 149         return -EINVAL;
 150
 151 }
 152
 153 /*
 154 This function will write into PHY registers.
 155 */
 156 static int amd8111e_write_phy(struct amd8111e_priv* lp,int phy_id, int reg, u32 val)
 157 {
 158         unsigned int repeat = REPEAT_CNT;
 159         void __iomem *mmio = lp->mmio;
 160         unsigned int reg_val;
 161
 162         reg_val = readl(mmio + PHY_ACCESS);
 163         while (reg_val & PHY_CMD_ACTIVE)
 164                 reg_val = readl( mmio + PHY_ACCESS );
 165
 166         writel( PHY_WR_CMD | ((phy_id & 0x1f) << 21) |
 167                            ((reg & 0x1f) << 16)|val, mmio + PHY_ACCESS);
 168
 169         do{
 170                 reg_val = readl(mmio + PHY_ACCESS);
 171                 udelay(30);  /* It takes 30 us to read/write the data */
 172         } while (--repeat && (reg_val & PHY_CMD_ACTIVE));
 173
 174         if(reg_val & PHY_RD_ERR)
 175                 goto err_phy_write;
 176
 177         return 0;
 178
 179 err_phy_write:
 180         return -EINVAL;
 181
 182 }
 183 /*
 184 This is the mii register read function provided to the mii interface.
 185 */
 186 static int amd8111e_mdio_read(struct net_device * dev, int phy_id, int reg_num)
 187 {
 188         struct amd8111e_priv* lp = netdev_priv(dev);
 189         unsigned int reg_val;
 190
 191         amd8111e_read_phy(lp,phy_id,reg_num,&reg_val);
 192         return reg_val;
 193
 194 }
 195
 196 /*
 197 This is the mii register write function provided to the mii interface.
 198 */
 199 static void amd8111e_mdio_write(struct net_device * dev, int phy_id, int reg_num, int val)
 200 {
 201         struct amd8111e_priv* lp = netdev_priv(dev);
 202
 203         amd8111e_write_phy(lp, phy_id, reg_num, val);
 204 }
 205
 206 /*
 207 This function will set PHY speed. During initialization sets the original speed to 100 full.
 208 */
 209 static void amd8111e_set_ext_phy(struct net_device *dev)
 210 {
 211         struct amd8111e_priv *lp = netdev_priv(dev);
 212         u32 bmcr,advert,tmp;
 213
 214         /* Determine mii register values to set the speed */
 215         advert = amd8111e_mdio_read(dev, lp->ext_phy_addr, MII_ADVERTISE);
 216         tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
 217         switch (lp->ext_phy_option){
 218
 219                 default:
 220                 case SPEED_AUTONEG: /* advertise all values */
 221                         tmp |= ( ADVERTISE_10HALF|ADVERTISE_10FULL|
 222                                 ADVERTISE_100HALF|ADVERTISE_100FULL) ;
 223                         break;
 224                 case SPEED10_HALF:
 225                         tmp |= ADVERTISE_10HALF;
 226                         break;
 227                 case SPEED10_FULL:
 228                         tmp |= ADVERTISE_10FULL;
 229                         break;
 230                 case SPEED100_HALF:
 231                         tmp |= ADVERTISE_100HALF;
 232                         break;
 233                 case SPEED100_FULL:
 234                         tmp |= ADVERTISE_100FULL;
 235                         break;
 236         }
 237
 238         if(advert != tmp)
 239                 amd8111e_mdio_write(dev, lp->ext_phy_addr, MII_ADVERTISE, tmp);
 240         /* Restart auto negotiation */
 241         bmcr = amd8111e_mdio_read(dev, lp->ext_phy_addr, MII_BMCR);
 242         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
 243         amd8111e_mdio_write(dev, lp->ext_phy_addr, MII_BMCR, bmcr);
 244
 245 }
 246
 247 /*
 248 This function will unmap skb->data space and will free
 249 all transmit and receive skbuffs.
 250 */
 251 static int amd8111e_free_skbs(struct net_device *dev)
 252 {
 253         struct amd8111e_priv *lp = netdev_priv(dev);
 254         struct sk_buff* rx_skbuff;
 255         int i;
 256
 257         /* Freeing transmit skbs */
 258         for(i = 0; i < NUM_TX_BUFFERS; i++){
 259                 if(lp->tx_skbuff[i]){
 260                         pci_unmap_single(lp->pci_dev,lp->tx_dma_addr[i],                                        lp->tx_skbuff[i]->len,PCI_DMA_TODEVICE);
 261                         dev_kfree_skb (lp->tx_skbuff[i]);
 262                         lp->tx_skbuff[i] = NULL;
 263                         lp->tx_dma_addr[i] = 0;
 264                 }
 265         }
 266         /* Freeing previously allocated receive buffers */
 267         for (i = 0; i < NUM_RX_BUFFERS; i++){
 268                 rx_skbuff = lp->rx_skbuff[i];
 269                 if(rx_skbuff != NULL){
 270                         pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[i],
 271                                   lp->rx_buff_len - 2,PCI_DMA_FROMDEVICE);
 272                         dev_kfree_skb(lp->rx_skbuff[i]);
 273                         lp->rx_skbuff[i] = NULL;
 274                         lp->rx_dma_addr[i] = 0;
 275                 }
 276         }
 277
 278         return 0;
 279 }
 280
 281 /*
 282 This will set the receive buffer length corresponding to the mtu size of networkinterface.
 283 */
 284 static inline void amd8111e_set_rx_buff_len(struct net_device* dev)
 285 {
 286         struct amd8111e_priv* lp = netdev_priv(dev);
 287         unsigned int mtu = dev->mtu;
 288
 289         if (mtu > ETH_DATA_LEN){
 290                 /* MTU + ethernet header + FCS
 291                 + optional VLAN tag + skb reserve space 2 */
 292
 293                 lp->rx_buff_len = mtu + ETH_HLEN + 10;
 294                 lp->options |= OPTION_JUMBO_ENABLE;
 295         } else{
 296                 lp->rx_buff_len = PKT_BUFF_SZ;
 297                 lp->options &= ~OPTION_JUMBO_ENABLE;
 298         }
 299 }
 300
 301 /*
 302 This function will free all the previously allocated buffers, determine new receive buffer length  and will allocate new receive buffers. This function also allocates and initializes both the transmitter and receive hardware descriptors.
 303  */
 304 static int amd8111e_init_ring(struct net_device *dev)
 305 {
 306         struct amd8111e_priv *lp = netdev_priv(dev);
 307         int i;
 308
 309         lp->rx_idx = lp->tx_idx = 0;
 310         lp->tx_complete_idx = 0;
 311         lp->tx_ring_idx = 0;
 312
 313
 314         if(lp->opened)
 315                 /* Free previously allocated transmit and receive skbs */
 316                 amd8111e_free_skbs(dev);
 317
 318         else{
 319                  /* allocate the tx and rx descriptors */
 320                 if((lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
 321                         sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,
 322                         &lp->tx_ring_dma_addr)) == NULL)
 323
 324                         goto err_no_mem;
 325
 326                 if((lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
 327                         sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,
 328                         &lp->rx_ring_dma_addr)) == NULL)
 329
 330                         goto err_free_tx_ring;
 331
 332         }
 333         /* Set new receive buff size */
 334         amd8111e_set_rx_buff_len(dev);
 335
 336         /* Allocating receive  skbs */
 337         for (i = 0; i < NUM_RX_BUFFERS; i++) {
 338
 339                 if (!(lp->rx_skbuff[i] = dev_alloc_skb(lp->rx_buff_len))) {
 340                                 /* Release previos allocated skbs */
 341                                 for(--i; i >= 0 ;i--)
 342                                         dev_kfree_skb(lp->rx_skbuff[i]);
 343                                 goto err_free_rx_ring;
 344                 }
 345                 skb_reserve(lp->rx_skbuff[i],2);
 346         }
 347         /* Initilaizing receive descriptors */
 348         for (i = 0; i < NUM_RX_BUFFERS; i++) {
 349                 lp->rx_dma_addr[i] = pci_map_single(lp->pci_dev,
 350                         lp->rx_skbuff[i]->data,lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 351
 352                 lp->rx_ring[i].buff_phy_addr = cpu_to_le32(lp->rx_dma_addr[i]);
 353                 lp->rx_ring[i].buff_count = cpu_to_le16(lp->rx_buff_len-2);
 354                 wmb();
 355                 lp->rx_ring[i].rx_flags = cpu_to_le16(OWN_BIT);
 356         }
 357
 358         /* Initializing transmit descriptors */
 359         for (i = 0; i < NUM_TX_RING_DR; i++) {
 360                 lp->tx_ring[i].buff_phy_addr = 0;
 361                 lp->tx_ring[i].tx_flags = 0;
 362                 lp->tx_ring[i].buff_count = 0;
 363         }
 364
 365         return 0;
 366
 367 err_free_rx_ring:
 368
 369         pci_free_consistent(lp->pci_dev,
 370                 sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,lp->rx_ring,
 371                 lp->rx_ring_dma_addr);
 372
 373 err_free_tx_ring:
 374
 375         pci_free_consistent(lp->pci_dev,
 376                  sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,lp->tx_ring,
 377                  lp->tx_ring_dma_addr);
 378
 379 err_no_mem:
 380         return -ENOMEM;
 381 }
 382 /* This function will set the interrupt coalescing according to the input arguments */
 383 static int amd8111e_set_coalesce(struct net_device * dev, enum coal_mode cmod)
 384 {
 385         unsigned int timeout;
 386         unsigned int event_count;
 387
 388         struct amd8111e_priv *lp = netdev_priv(dev);
 389         void __iomem *mmio = lp->mmio;
 390         struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
 391
 392
 393         switch(cmod)
 394         {
 395                 case RX_INTR_COAL :
 396                         timeout = coal_conf->rx_timeout;
 397                         event_count = coal_conf->rx_event_count;
 398                         if( timeout > MAX_TIMEOUT ||
 399                                         event_count > MAX_EVENT_COUNT )
 400                                 return -EINVAL;
 401
 402                         timeout = timeout * DELAY_TIMER_CONV;
 403                         writel(VAL0|STINTEN, mmio+INTEN0);
 404                         writel((u32)DLY_INT_A_R0|( event_count<< 16 )|timeout,
 405                                                         mmio+DLY_INT_A);
 406                         break;
 407
 408                 case TX_INTR_COAL :
 409                         timeout = coal_conf->tx_timeout;
 410                         event_count = coal_conf->tx_event_count;
 411                         if( timeout > MAX_TIMEOUT ||
 412                                         event_count > MAX_EVENT_COUNT )
 413                                 return -EINVAL;
 414
 415
 416                         timeout = timeout * DELAY_TIMER_CONV;
 417                         writel(VAL0|STINTEN,mmio+INTEN0);
 418                         writel((u32)DLY_INT_B_T0|( event_count<< 16 )|timeout,
 419                                                          mmio+DLY_INT_B);
 420                         break;
 421
 422                 case DISABLE_COAL:
 423                         writel(0,mmio+STVAL);
 424                         writel(STINTEN, mmio+INTEN0);
 425                         writel(0, mmio +DLY_INT_B);
 426                         writel(0, mmio+DLY_INT_A);
 427                         break;
 428                  case ENABLE_COAL:
 429                        /* Start the timer */
 430                         writel((u32)SOFT_TIMER_FREQ, mmio+STVAL); /*  0.5 sec */
 431                         writel(VAL0|STINTEN, mmio+INTEN0);
 432                         break;
 433                 default:
 434                         break;
 435
 436    }
 437         return 0;
 438
 439 }
 440
 441 /*
 442 This function initializes the device registers  and starts the device.
 443 */
 444 static int amd8111e_restart(struct net_device *dev)
 445 {
 446         struct amd8111e_priv *lp = netdev_priv(dev);
 447         void __iomem *mmio = lp->mmio;
 448         int i,reg_val;
 449
 450         /* stop the chip */
 451          writel(RUN, mmio + CMD0);
 452
 453         if(amd8111e_init_ring(dev))
 454                 return -ENOMEM;
 455
 456         /* enable the port manager and set auto negotiation always */
 457         writel((u32) VAL1|EN_PMGR, mmio + CMD3 );
 458         writel((u32)XPHYANE|XPHYRST , mmio + CTRL2);
 459
 460         amd8111e_set_ext_phy(dev);
 461
 462         /* set control registers */
 463         reg_val = readl(mmio + CTRL1);
 464         reg_val &= ~XMTSP_MASK;
 465         writel( reg_val| XMTSP_128 | CACHE_ALIGN, mmio + CTRL1 );
 466
 467         /* enable interrupt */
 468         writel( APINT5EN | APINT4EN | APINT3EN | APINT2EN | APINT1EN |
 469                 APINT0EN | MIIPDTINTEN | MCCIINTEN | MCCINTEN | MREINTEN |
 470                 SPNDINTEN | MPINTEN | SINTEN | STINTEN, mmio + INTEN0);
 471
 472         writel(VAL3 | LCINTEN | VAL1 | TINTEN0 | VAL0 | RINTEN0, mmio + INTEN0);
 473
 474         /* initialize tx and rx ring base addresses */
 475         writel((u32)lp->tx_ring_dma_addr,mmio + XMT_RING_BASE_ADDR0);
 476         writel((u32)lp->rx_ring_dma_addr,mmio+ RCV_RING_BASE_ADDR0);
 477
 478         writew((u32)NUM_TX_RING_DR, mmio + XMT_RING_LEN0);
 479         writew((u16)NUM_RX_RING_DR, mmio + RCV_RING_LEN0);
 480
 481         /* set default IPG to 96 */
 482         writew((u32)DEFAULT_IPG,mmio+IPG);
 483         writew((u32)(DEFAULT_IPG-IFS1_DELTA), mmio + IFS1);
 484
 485         if(lp->options & OPTION_JUMBO_ENABLE){
 486                 writel((u32)VAL2|JUMBO, mmio + CMD3);
 487                 /* Reset REX_UFLO */
 488                 writel( REX_UFLO, mmio + CMD2);
 489                 /* Should not set REX_UFLO for jumbo frames */
 490                 writel( VAL0 | APAD_XMT|REX_RTRY , mmio + CMD2);
 491         }else{
 492                 writel( VAL0 | APAD_XMT | REX_RTRY|REX_UFLO, mmio + CMD2);
 493                 writel((u32)JUMBO, mmio + CMD3);
 494         }
 495
 496 #if AMD8111E_VLAN_TAG_USED
 497         writel((u32) VAL2|VSIZE|VL_TAG_DEL, mmio + CMD3);
 498 #endif
 499         writel( VAL0 | APAD_XMT | REX_RTRY, mmio + CMD2 );
 500
 501         /* Setting the MAC address to the device */
 502         for(i = 0; i < ETH_ADDR_LEN; i++)
 503                 writeb( dev->dev_addr[i], mmio + PADR + i );
 504
 505         /* Enable interrupt coalesce */
 506         if(lp->options & OPTION_INTR_COAL_ENABLE){
 507                 printk(KERN_INFO "%s: Interrupt Coalescing Enabled.\n",
 508                                                                 dev->name);
 509                 amd8111e_set_coalesce(dev,ENABLE_COAL);
 510         }
 511
 512         /* set RUN bit to start the chip */
 513         writel(VAL2 | RDMD0, mmio + CMD0);
 514         writel(VAL0 | INTREN | RUN, mmio + CMD0);
 515
 516         /* To avoid PCI posting bug */
 517         readl(mmio+CMD0);
 518         return 0;
 519 }
 520 /*
 521 This function clears necessary the device registers.
 522 */
 523 static void amd8111e_init_hw_default( struct amd8111e_priv* lp)
 524 {
 525         unsigned int reg_val;
 526         unsigned int logic_filter[2] ={0,};
 527         void __iomem *mmio = lp->mmio;
 528
 529
 530         /* stop the chip */
 531         writel(RUN, mmio + CMD0);
 532
 533         /* AUTOPOLL0 Register *//*TBD default value is 8100 in FPS */
 534         writew( 0x8100 | lp->ext_phy_addr, mmio + AUTOPOLL0);
 535
 536         /* Clear RCV_RING_BASE_ADDR */
 537         writel(0, mmio + RCV_RING_BASE_ADDR0);
 538
 539         /* Clear XMT_RING_BASE_ADDR */
 540         writel(0, mmio + XMT_RING_BASE_ADDR0);
 541         writel(0, mmio + XMT_RING_BASE_ADDR1);
 542         writel(0, mmio + XMT_RING_BASE_ADDR2);
 543         writel(0, mmio + XMT_RING_BASE_ADDR3);
 544
 545         /* Clear CMD0  */
 546         writel(CMD0_CLEAR,mmio + CMD0);
 547
 548         /* Clear CMD2 */
 549         writel(CMD2_CLEAR, mmio +CMD2);
 550
 551         /* Clear CMD7 */
 552         writel(CMD7_CLEAR , mmio + CMD7);
 553
 554         /* Clear DLY_INT_A and DLY_INT_B */
 555         writel(0x0, mmio + DLY_INT_A);
 556         writel(0x0, mmio + DLY_INT_B);
 557
 558         /* Clear FLOW_CONTROL */
 559         writel(0x0, mmio + FLOW_CONTROL);
 560
 561         /* Clear INT0  write 1 to clear register */
 562         reg_val = readl(mmio + INT0);
 563         writel(reg_val, mmio + INT0);
 564
 565         /* Clear STVAL */
 566         writel(0x0, mmio + STVAL);
 567
 568         /* Clear INTEN0 */
 569         writel( INTEN0_CLEAR, mmio + INTEN0);
 570
 571         /* Clear LADRF */
 572         writel(0x0 , mmio + LADRF);
 573
 574         /* Set SRAM_SIZE & SRAM_BOUNDARY registers  */
 575         writel( 0x80010,mmio + SRAM_SIZE);
 576
 577         /* Clear RCV_RING0_LEN */
 578         writel(0x0, mmio +  RCV_RING_LEN0);
 579
 580         /* Clear XMT_RING0/1/2/3_LEN */
 581         writel(0x0, mmio +  XMT_RING_LEN0);
 582         writel(0x0, mmio +  XMT_RING_LEN1);
 583         writel(0x0, mmio +  XMT_RING_LEN2);
 584         writel(0x0, mmio +  XMT_RING_LEN3);
 585
 586         /* Clear XMT_RING_LIMIT */
 587         writel(0x0, mmio + XMT_RING_LIMIT);
 588
 589         /* Clear MIB */
 590         writew(MIB_CLEAR, mmio + MIB_ADDR);
 591
 592         /* Clear LARF */
 593         amd8111e_writeq(*(u64*)logic_filter,mmio+LADRF);
 594
 595         /* SRAM_SIZE register */
 596         reg_val = readl(mmio + SRAM_SIZE);
 597
 598         if(lp->options & OPTION_JUMBO_ENABLE)
 599                 writel( VAL2|JUMBO, mmio + CMD3);
 600 #if AMD8111E_VLAN_TAG_USED
 601         writel(VAL2|VSIZE|VL_TAG_DEL, mmio + CMD3 );
 602 #endif
 603         /* Set default value to CTRL1 Register */
 604         writel(CTRL1_DEFAULT, mmio + CTRL1);
 605
 606         /* To avoid PCI posting bug */
 607         readl(mmio + CMD2);
 608
 609 }
 610
 611 /*
 612 This function disables the interrupt and clears all the pending
 613 interrupts in INT0
 614  */
 615 static void amd8111e_disable_interrupt(struct amd8111e_priv* lp)
 616 {
 617         u32 intr0;
 618
 619         /* Disable interrupt */
 620         writel(INTREN, lp->mmio + CMD0);
 621
 622         /* Clear INT0 */
 623         intr0 = readl(lp->mmio + INT0);
 624         writel(intr0, lp->mmio + INT0);
 625
 626         /* To avoid PCI posting bug */
 627         readl(lp->mmio + INT0);
 628
 629 }
 630
 631 /*
 632 This function stops the chip.
 633 */
 634 static void amd8111e_stop_chip(struct amd8111e_priv* lp)
 635 {
 636         writel(RUN, lp->mmio + CMD0);
 637
 638         /* To avoid PCI posting bug */
 639         readl(lp->mmio + CMD0);
 640 }
 641
 642 /*
 643 This function frees the  transmiter and receiver descriptor rings.
 644 */
 645 static void amd8111e_free_ring(struct amd8111e_priv* lp)
 646 {
 647         /* Free transmit and receive descriptor rings */
 648         if(lp->rx_ring){
 649                 pci_free_consistent(lp->pci_dev,
 650                         sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,
 651                         lp->rx_ring, lp->rx_ring_dma_addr);
 652                 lp->rx_ring = NULL;
 653         }
 654
 655         if(lp->tx_ring){
 656                 pci_free_consistent(lp->pci_dev,
 657                         sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,
 658                         lp->tx_ring, lp->tx_ring_dma_addr);
 659
 660                 lp->tx_ring = NULL;
 661         }
 662
 663 }
 664
 665 /*
 666 This function will free all the transmit skbs that are actually transmitted by the device. It will check the ownership of the skb before freeing the skb.
 667 */
 668 static int amd8111e_tx(struct net_device *dev)
 669 {
 670         struct amd8111e_priv* lp = netdev_priv(dev);
 671         int tx_index = lp->tx_complete_idx & TX_RING_DR_MOD_MASK;
 672         int status;
 673         /* Complete all the transmit packet */
 674         while (lp->tx_complete_idx != lp->tx_idx){
 675                 tx_index =  lp->tx_complete_idx & TX_RING_DR_MOD_MASK;
 676                 status = le16_to_cpu(lp->tx_ring[tx_index].tx_flags);
 677
 678                 if(status & OWN_BIT)
 679                         break;  /* It still hasn't been Txed */
 680
 681                 lp->tx_ring[tx_index].buff_phy_addr = 0;
 682
 683                 /* We must free the original skb */
 684                 if (lp->tx_skbuff[tx_index]) {
 685                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[tx_index],
 686                                         lp->tx_skbuff[tx_index]->len,
 687                                         PCI_DMA_TODEVICE);
 688                         dev_kfree_skb_irq (lp->tx_skbuff[tx_index]);
 689                         lp->tx_skbuff[tx_index] = NULL;
 690                         lp->tx_dma_addr[tx_index] = 0;
 691                 }
 692                 lp->tx_complete_idx++;
 693                 /*COAL update tx coalescing parameters */
 694                 lp->coal_conf.tx_packets++;
 695                 lp->coal_conf.tx_bytes +=
 696                         le16_to_cpu(lp->tx_ring[tx_index].buff_count);
 697
 698                 if (netif_queue_stopped(dev) &&
 699                         lp->tx_complete_idx > lp->tx_idx - NUM_TX_BUFFERS +2){
 700                         /* The ring is no longer full, clear tbusy. */
 701                         /* lp->tx_full = 0; */
 702                         netif_wake_queue (dev);
 703                 }
 704         }
 705         return 0;
 706 }
 707
 708 /* This function handles the driver receive operation in polling mode */
 709 static int amd8111e_rx_poll(struct napi_struct *napi, int budget)
 710 {
 711         struct amd8111e_priv *lp = container_of(napi, struct amd8111e_priv, napi);
 712         struct net_device *dev = lp->amd8111e_net_dev;
 713         int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
 714         void __iomem *mmio = lp->mmio;
 715         struct sk_buff *skb,*new_skb;
 716         int min_pkt_len, status;
 717         unsigned int intr0;
 718         int num_rx_pkt = 0;
 719         short pkt_len;
 720 #if AMD8111E_VLAN_TAG_USED
 721         short vtag;
 722 #endif
 723         int rx_pkt_limit = budget;
 724         unsigned long flags;
 725
 726         do{
 727                 /* process receive packets until we use the quota*/
 728                 /* If we own the next entry, it's a new packet. Send it up. */
 729                 while(1) {
 730                         status = le16_to_cpu(lp->rx_ring[rx_index].rx_flags);
 731                         if (status & OWN_BIT)
 732                                 break;
 733
 734                         /*
 735                          * There is a tricky error noted by John Murphy,
 736                          * <murf@perftech.com> to Russ Nelson: Even with
 737                          * full-sized * buffers it's possible for a
 738                          * jabber packet to use two buffers, with only
 739                          * the last correctly noting the error.
 740                          */
 741
 742                         if(status & ERR_BIT) {
 743                                 /* reseting flags */
 744                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 745                                 goto err_next_pkt;
 746                         }
 747                         /* check for STP and ENP */
 748                         if(!((status & STP_BIT) && (status & ENP_BIT))){
 749                                 /* reseting flags */
 750                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 751                                 goto err_next_pkt;
 752                         }
 753                         pkt_len = le16_to_cpu(lp->rx_ring[rx_index].msg_count) - 4;
 754
 755 #if AMD8111E_VLAN_TAG_USED
 756                         vtag = status & TT_MASK;
 757                         /*MAC will strip vlan tag*/
 758                         if (vtag != 0)
 759                                 min_pkt_len =MIN_PKT_LEN - 4;
 760                         else
 761 #endif
 762                                 min_pkt_len =MIN_PKT_LEN;
 763
 764                         if (pkt_len < min_pkt_len) {
 765                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 766                                 lp->drv_rx_errors++;
 767                                 goto err_next_pkt;
 768                         }
 769                         if(--rx_pkt_limit < 0)
 770                                 goto rx_not_empty;
 771                         if(!(new_skb = dev_alloc_skb(lp->rx_buff_len))){
 772                                 /* if allocation fail,
 773                                    ignore that pkt and go to next one */
 774                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 775                                 lp->drv_rx_errors++;
 776                                 goto err_next_pkt;
 777                         }
 778
 779                         skb_reserve(new_skb, 2);
 780                         skb = lp->rx_skbuff[rx_index];
 781                         pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[rx_index],
 782                                          lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 783                         skb_put(skb, pkt_len);
 784                         lp->rx_skbuff[rx_index] = new_skb;
 785                         lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 786                                                                    new_skb->data,
 787                                                                    lp->rx_buff_len-2,
 788                                                                    PCI_DMA_FROMDEVICE);
 789
 790                         skb->protocol = eth_type_trans(skb, dev);
 791
 792 #if AMD8111E_VLAN_TAG_USED
 793                         if (vtag == TT_VLAN_TAGGED){
 794                                 u16 vlan_tag = le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info);
 795                                 __vlan_hwaccel_put_tag(skb, vlan_tag);
 796                         }
 797 #endif
 798                         netif_receive_skb(skb);
 799                         /*COAL update rx coalescing parameters*/
 800                         lp->coal_conf.rx_packets++;
 801                         lp->coal_conf.rx_bytes += pkt_len;
 802                         num_rx_pkt++;
 803
 804                 err_next_pkt:
 805                         lp->rx_ring[rx_index].buff_phy_addr
 806                                 = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 807                         lp->rx_ring[rx_index].buff_count =
 808                                 cpu_to_le16(lp->rx_buff_len-2);
 809                         wmb();
 810                         lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 811                         rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 812                 }
 813                 /* Check the interrupt status register for more packets in the
 814                    mean time. Process them since we have not used up our quota.*/
 815
 816                 intr0 = readl(mmio + INT0);
 817                 /*Ack receive packets */
 818                 writel(intr0 & RINT0,mmio + INT0);
 819
 820         } while(intr0 & RINT0);
 821
 822         if (rx_pkt_limit > 0) {
 823                 /* Receive descriptor is empty now */
 824                 spin_lock_irqsave(&lp->lock, flags);
 825                 __napi_complete(napi);
 826                 writel(VAL0|RINTEN0, mmio + INTEN0);
 827                 writel(VAL2 | RDMD0, mmio + CMD0);
 828                 spin_unlock_irqrestore(&lp->lock, flags);
 829         }
 830
 831 rx_not_empty:
 832         return num_rx_pkt;
 833 }
 834
 835 /*
 836 This function will indicate the link status to the kernel.
 837 */
 838 static int amd8111e_link_change(struct net_device* dev)
 839 {
 840         struct amd8111e_priv *lp = netdev_priv(dev);
 841         int status0,speed;
 842
 843         /* read the link change */
 844         status0 = readl(lp->mmio + STAT0);
 845
 846         if(status0 & LINK_STATS){
 847                 if(status0 & AUTONEG_COMPLETE)
 848                         lp->link_config.autoneg = AUTONEG_ENABLE;
 849                 else
 850                         lp->link_config.autoneg = AUTONEG_DISABLE;
 851
 852                 if(status0 & FULL_DPLX)
 853                         lp->link_config.duplex = DUPLEX_FULL;
 854                 else
 855                         lp->link_config.duplex = DUPLEX_HALF;
 856                 speed = (status0 & SPEED_MASK) >> 7;
 857                 if(speed == PHY_SPEED_10)
 858                         lp->link_config.speed = SPEED_10;
 859                 else if(speed == PHY_SPEED_100)
 860                         lp->link_config.speed = SPEED_100;
 861
 862                 printk(KERN_INFO "%s: Link is Up. Speed is %s Mbps %s Duplex\n",                        dev->name,
 863                        (lp->link_config.speed == SPEED_100) ? "100": "10",
 864                        (lp->link_config.duplex == DUPLEX_FULL)? "Full": "Half");
 865                 netif_carrier_on(dev);
 866         }
 867         else{
 868                 lp->link_config.speed = SPEED_INVALID;
 869                 lp->link_config.duplex = DUPLEX_INVALID;
 870                 lp->link_config.autoneg = AUTONEG_INVALID;
 871                 printk(KERN_INFO "%s: Link is Down.\n",dev->name);
 872                 netif_carrier_off(dev);
 873         }
 874
 875         return 0;
 876 }
 877 /*
 878 This function reads the mib counters.
 879 */
 880 static int amd8111e_read_mib(void __iomem *mmio, u8 MIB_COUNTER)
 881 {
 882         unsigned int  status;
 883         unsigned  int data;
 884         unsigned int repeat = REPEAT_CNT;
 885
 886         writew( MIB_RD_CMD | MIB_COUNTER, mmio + MIB_ADDR);
 887         do {
 888                 status = readw(mmio + MIB_ADDR);
 889                 udelay(2);      /* controller takes MAX 2 us to get mib data */
 890         }
 891         while (--repeat && (status & MIB_CMD_ACTIVE));
 892
 893         data = readl(mmio + MIB_DATA);
 894         return data;
 895 }
 896
 897 /*
 898  * This function reads the mib registers and returns the hardware statistics.
 899  * It updates previous internal driver statistics with new values.
 900  */
 901 static struct net_device_stats *amd8111e_get_stats(struct net_device *dev)
 902 {
 903         struct amd8111e_priv *lp = netdev_priv(dev);
 904         void __iomem *mmio = lp->mmio;
 905         unsigned long flags;
 906         struct net_device_stats *new_stats = &dev->stats;
 907
 908         if (!lp->opened)
 909                 return new_stats;
 910         spin_lock_irqsave (&lp->lock, flags);
 911
 912         /* stats.rx_packets */
 913         new_stats->rx_packets = amd8111e_read_mib(mmio, rcv_broadcast_pkts)+
 914                                 amd8111e_read_mib(mmio, rcv_multicast_pkts)+
 915                                 amd8111e_read_mib(mmio, rcv_unicast_pkts);
 916
 917         /* stats.tx_packets */
 918         new_stats->tx_packets = amd8111e_read_mib(mmio, xmt_packets);
 919
 920         /*stats.rx_bytes */
 921         new_stats->rx_bytes = amd8111e_read_mib(mmio, rcv_octets);
 922
 923         /* stats.tx_bytes */
 924         new_stats->tx_bytes = amd8111e_read_mib(mmio, xmt_octets);
 925
 926         /* stats.rx_errors */
 927         /* hw errors + errors driver reported */
 928         new_stats->rx_errors = amd8111e_read_mib(mmio, rcv_undersize_pkts)+
 929                                 amd8111e_read_mib(mmio, rcv_fragments)+
 930                                 amd8111e_read_mib(mmio, rcv_jabbers)+
 931                                 amd8111e_read_mib(mmio, rcv_alignment_errors)+
 932                                 amd8111e_read_mib(mmio, rcv_fcs_errors)+
 933                                 amd8111e_read_mib(mmio, rcv_miss_pkts)+
 934                                 lp->drv_rx_errors;
 935
 936         /* stats.tx_errors */
 937         new_stats->tx_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
 938
 939         /* stats.rx_dropped*/
 940         new_stats->rx_dropped = amd8111e_read_mib(mmio, rcv_miss_pkts);
 941
 942         /* stats.tx_dropped*/
 943         new_stats->tx_dropped = amd8111e_read_mib(mmio,  xmt_underrun_pkts);
 944
 945         /* stats.multicast*/
 946         new_stats->multicast = amd8111e_read_mib(mmio, rcv_multicast_pkts);
 947
 948         /* stats.collisions*/
 949         new_stats->collisions = amd8111e_read_mib(mmio, xmt_collisions);
 950
 951         /* stats.rx_length_errors*/
 952         new_stats->rx_length_errors =
 953                 amd8111e_read_mib(mmio, rcv_undersize_pkts)+
 954                 amd8111e_read_mib(mmio, rcv_oversize_pkts);
 955
 956         /* stats.rx_over_errors*/
 957         new_stats->rx_over_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
 958
 959         /* stats.rx_crc_errors*/
 960         new_stats->rx_crc_errors = amd8111e_read_mib(mmio, rcv_fcs_errors);
 961
 962         /* stats.rx_frame_errors*/
 963         new_stats->rx_frame_errors =
 964                 amd8111e_read_mib(mmio, rcv_alignment_errors);
 965
 966         /* stats.rx_fifo_errors */
 967         new_stats->rx_fifo_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
 968
 969         /* stats.rx_missed_errors */
 970         new_stats->rx_missed_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
 971
 972         /* stats.tx_aborted_errors*/
 973         new_stats->tx_aborted_errors =
 974                 amd8111e_read_mib(mmio, xmt_excessive_collision);
 975
 976         /* stats.tx_carrier_errors*/
 977         new_stats->tx_carrier_errors =
 978                 amd8111e_read_mib(mmio, xmt_loss_carrier);
 979
 980         /* stats.tx_fifo_errors*/
 981         new_stats->tx_fifo_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
 982
 983         /* stats.tx_window_errors*/
 984         new_stats->tx_window_errors =
 985                 amd8111e_read_mib(mmio, xmt_late_collision);
 986
 987         /* Reset the mibs for collecting new statistics */
 988         /* writew(MIB_CLEAR, mmio + MIB_ADDR);*/
 989
 990         spin_unlock_irqrestore (&lp->lock, flags);
 991
 992         return new_stats;
 993 }
 994 /* This function recalculate the interrupt coalescing  mode on every interrupt
 995 according to the datarate and the packet rate.
 996 */
 997 static int amd8111e_calc_coalesce(struct net_device *dev)
 998 {
 999         struct amd8111e_priv *lp = netdev_priv(dev);
1000         struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
1001         int tx_pkt_rate;
1002         int rx_pkt_rate;
1003         int tx_data_rate;
1004         int rx_data_rate;
1005         int rx_pkt_size;
1006         int tx_pkt_size;
1007
1008         tx_pkt_rate = coal_conf->tx_packets - coal_conf->tx_prev_packets;
1009         coal_conf->tx_prev_packets =  coal_conf->tx_packets;
1010
1011         tx_data_rate = coal_conf->tx_bytes - coal_conf->tx_prev_bytes;
1012         coal_conf->tx_prev_bytes =  coal_conf->tx_bytes;
1013
1014         rx_pkt_rate = coal_conf->rx_packets - coal_conf->rx_prev_packets;
1015         coal_conf->rx_prev_packets =  coal_conf->rx_packets;
1016
1017         rx_data_rate = coal_conf->rx_bytes - coal_conf->rx_prev_bytes;
1018         coal_conf->rx_prev_bytes =  coal_conf->rx_bytes;
1019
1020         if(rx_pkt_rate < 800){
1021                 if(coal_conf->rx_coal_type != NO_COALESCE){
1022
1023                         coal_conf->rx_timeout = 0x0;
1024                         coal_conf->rx_event_count = 0;
1025                         amd8111e_set_coalesce(dev,RX_INTR_COAL);
1026                         coal_conf->rx_coal_type = NO_COALESCE;
1027                 }
1028         }
1029         else{
1030
1031                 rx_pkt_size = rx_data_rate/rx_pkt_rate;
1032                 if (rx_pkt_size < 128){
1033                         if(coal_conf->rx_coal_type != NO_COALESCE){
1034
1035                                 coal_conf->rx_timeout = 0;
1036                                 coal_conf->rx_event_count = 0;
1037                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1038                                 coal_conf->rx_coal_type = NO_COALESCE;
1039                         }
1040
1041                 }
1042                 else if ( (rx_pkt_size >= 128) && (rx_pkt_size < 512) ){
1043
1044                         if(coal_conf->rx_coal_type !=  LOW_COALESCE){
1045                                 coal_conf->rx_timeout = 1;
1046                                 coal_conf->rx_event_count = 4;
1047                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1048                                 coal_conf->rx_coal_type = LOW_COALESCE;
1049                         }
1050                 }
1051                 else if ((rx_pkt_size >= 512) && (rx_pkt_size < 1024)){
1052
1053                         if(coal_conf->rx_coal_type !=  MEDIUM_COALESCE){
1054                                 coal_conf->rx_timeout = 1;
1055                                 coal_conf->rx_event_count = 4;
1056                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1057                                 coal_conf->rx_coal_type = MEDIUM_COALESCE;
1058                         }
1059
1060                 }
1061                 else if(rx_pkt_size >= 1024){
1062                         if(coal_conf->rx_coal_type !=  HIGH_COALESCE){
1063                                 coal_conf->rx_timeout = 2;
1064                                 coal_conf->rx_event_count = 3;
1065                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1066                                 coal_conf->rx_coal_type = HIGH_COALESCE;
1067                         }
1068                 }
1069         }
1070         /* NOW FOR TX INTR COALESC */
1071         if(tx_pkt_rate < 800){
1072                 if(coal_conf->tx_coal_type != NO_COALESCE){
1073
1074                         coal_conf->tx_timeout = 0x0;
1075                         coal_conf->tx_event_count = 0;
1076                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1077                         coal_conf->tx_coal_type = NO_COALESCE;
1078                 }
1079         }
1080         else{
1081
1082                 tx_pkt_size = tx_data_rate/tx_pkt_rate;
1083                 if (tx_pkt_size < 128){
1084
1085                         if(coal_conf->tx_coal_type != NO_COALESCE){
1086
1087                                 coal_conf->tx_timeout = 0;
1088                                 coal_conf->tx_event_count = 0;
1089                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1090                                 coal_conf->tx_coal_type = NO_COALESCE;
1091                         }
1092
1093                 }
1094                 else if ( (tx_pkt_size >= 128) && (tx_pkt_size < 512) ){
1095
1096                         if(coal_conf->tx_coal_type !=  LOW_COALESCE){
1097                                 coal_conf->tx_timeout = 1;
1098                                 coal_conf->tx_event_count = 2;
1099                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1100                                 coal_conf->tx_coal_type = LOW_COALESCE;
1101
1102                         }
1103                 }
1104                 else if ((tx_pkt_size >= 512) && (tx_pkt_size < 1024)){
1105
1106                         if(coal_conf->tx_coal_type !=  MEDIUM_COALESCE){
1107                                 coal_conf->tx_timeout = 2;
1108                                 coal_conf->tx_event_count = 5;
1109                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1110                                 coal_conf->tx_coal_type = MEDIUM_COALESCE;
1111                         }
1112
1113                 }
1114                 else if(tx_pkt_size >= 1024){
1115                         if (tx_pkt_size >= 1024){
1116                                 if(coal_conf->tx_coal_type !=  HIGH_COALESCE){
1117                                         coal_conf->tx_timeout = 4;
1118                                         coal_conf->tx_event_count = 8;
1119                                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1120                                         coal_conf->tx_coal_type = HIGH_COALESCE;
1121                                 }
1122                         }
1123                 }
1124         }
1125         return 0;
1126
1127 }
1128 /*
1129 This is device interrupt function. It handles transmit, receive,link change and hardware timer interrupts.
1130 */
1131 static irqreturn_t amd8111e_interrupt(int irq, void *dev_id)
1132 {
1133
1134         struct net_device * dev = (struct net_device *) dev_id;
1135         struct amd8111e_priv *lp = netdev_priv(dev);
1136         void __iomem *mmio = lp->mmio;
1137         unsigned int intr0, intren0;
1138         unsigned int handled = 1;
1139
1140         if(unlikely(dev == NULL))
1141                 return IRQ_NONE;
1142
1143         spin_lock(&lp->lock);
1144
1145         /* disabling interrupt */
1146         writel(INTREN, mmio + CMD0);
1147
1148         /* Read interrupt status */
1149         intr0 = readl(mmio + INT0);
1150         intren0 = readl(mmio + INTEN0);
1151
1152         /* Process all the INT event until INTR bit is clear. */
1153
1154         if (!(intr0 & INTR)){
1155                 handled = 0;
1156                 goto err_no_interrupt;
1157         }
1158
1159         /* Current driver processes 4 interrupts : RINT,TINT,LCINT,STINT */
1160         writel(intr0, mmio + INT0);
1161
1162         /* Check if Receive Interrupt has occurred. */
1163         if (intr0 & RINT0) {
1164                 if (napi_schedule_prep(&lp->napi)) {
1165                         /* Disable receive interupts */
1166                         writel(RINTEN0, mmio + INTEN0);
1167                         /* Schedule a polling routine */
1168                         __napi_schedule(&lp->napi);
1169                 } else if (intren0 & RINTEN0) {
1170                         printk("************Driver bug! interrupt while in poll\n");
1171                         /* Fix by disable receive interrupts */
1172                         writel(RINTEN0, mmio + INTEN0);
1173                 }
1174         }
1175
1176         /* Check if  Transmit Interrupt has occurred. */
1177         if (intr0 & TINT0)
1178                 amd8111e_tx(dev);
1179
1180         /* Check if  Link Change Interrupt has occurred. */
1181         if (intr0 & LCINT)
1182                 amd8111e_link_change(dev);
1183
1184         /* Check if Hardware Timer Interrupt has occurred. */
1185         if (intr0 & STINT)
1186                 amd8111e_calc_coalesce(dev);
1187
1188 err_no_interrupt:
1189         writel( VAL0 | INTREN,mmio + CMD0);
1190
1191         spin_unlock(&lp->lock);
1192
1193         return IRQ_RETVAL(handled);
1194 }
1195
1196 #ifdef CONFIG_NET_POLL_CONTROLLER
1197 static void amd8111e_poll(struct net_device *dev)
1198 {
1199         unsigned long flags;
1200         local_irq_save(flags);
1201         amd8111e_interrupt(0, dev);
1202         local_irq_restore(flags);
1203 }
1204 #endif
1205
1206
1207 /*
1208 This function closes the network interface and updates the statistics so that most recent statistics will be available after the interface is down.
1209 */
1210 static int amd8111e_close(struct net_device * dev)
1211 {
1212         struct amd8111e_priv *lp = netdev_priv(dev);
1213         netif_stop_queue(dev);
1214
1215         napi_disable(&lp->napi);
1216
1217         spin_lock_irq(&lp->lock);
1218
1219         amd8111e_disable_interrupt(lp);
1220         amd8111e_stop_chip(lp);
1221
1222         /* Free transmit and receive skbs */
1223         amd8111e_free_skbs(lp->amd8111e_net_dev);
1224
1225         netif_carrier_off(lp->amd8111e_net_dev);
1226
1227         /* Delete ipg timer */
1228         if(lp->options & OPTION_DYN_IPG_ENABLE)
1229                 del_timer_sync(&lp->ipg_data.ipg_timer);
1230
1231         spin_unlock_irq(&lp->lock);
1232         free_irq(dev->irq, dev);
1233         amd8111e_free_ring(lp);
1234
1235         /* Update the statistics before closing */
1236         amd8111e_get_stats(dev);
1237         lp->opened = 0;
1238         return 0;
1239 }
1240 /* This function opens new interface.It requests irq for the device, initializes the device,buffers and descriptors, and starts the device.
1241 */
1242 static int amd8111e_open(struct net_device * dev )
1243 {
1244         struct amd8111e_priv *lp = netdev_priv(dev);
1245
1246         if(dev->irq ==0 || request_irq(dev->irq, amd8111e_interrupt, IRQF_SHARED,
1247                                          dev->name, dev))
1248                 return -EAGAIN;
1249
1250         napi_enable(&lp->napi);
1251
1252         spin_lock_irq(&lp->lock);
1253
1254         amd8111e_init_hw_default(lp);
1255
1256         if(amd8111e_restart(dev)){
1257                 spin_unlock_irq(&lp->lock);
1258                 napi_disable(&lp->napi);
1259                 if (dev->irq)
1260                         free_irq(dev->irq, dev);
1261                 return -ENOMEM;
1262         }
1263         /* Start ipg timer */
1264         if(lp->options & OPTION_DYN_IPG_ENABLE){
1265                 add_timer(&lp->ipg_data.ipg_timer);
1266                 printk(KERN_INFO "%s: Dynamic IPG Enabled.\n",dev->name);
1267         }
1268
1269         lp->opened = 1;
1270
1271         spin_unlock_irq(&lp->lock);
1272
1273         netif_start_queue(dev);
1274
1275         return 0;
1276 }
1277 /*
1278 This function checks if there is any transmit  descriptors available to queue more packet.
1279 */
1280 static int amd8111e_tx_queue_avail(struct amd8111e_priv* lp )
1281 {
1282         int tx_index = lp->tx_idx & TX_BUFF_MOD_MASK;
1283         if (lp->tx_skbuff[tx_index])
1284                 return -1;
1285         else
1286                 return 0;
1287
1288 }
1289 /*
1290 This function will queue the transmit packets to the descriptors and will trigger the send operation. It also initializes the transmit descriptors with buffer physical address, byte count, ownership to hardware etc.
1291 */
1292
1293 static netdev_tx_t amd8111e_start_xmit(struct sk_buff *skb,
1294                                        struct net_device * dev)
1295 {
1296         struct amd8111e_priv *lp = netdev_priv(dev);
1297         int tx_index;
1298         unsigned long flags;
1299
1300         spin_lock_irqsave(&lp->lock, flags);
1301
1302         tx_index = lp->tx_idx & TX_RING_DR_MOD_MASK;
1303
1304         lp->tx_ring[tx_index].buff_count = cpu_to_le16(skb->len);
1305
1306         lp->tx_skbuff[tx_index] = skb;
1307         lp->tx_ring[tx_index].tx_flags = 0;
1308
1309 #if AMD8111E_VLAN_TAG_USED
1310         if (vlan_tx_tag_present(skb)) {
1311                 lp->tx_ring[tx_index].tag_ctrl_cmd |=
1312                                 cpu_to_le16(TCC_VLAN_INSERT);
1313                 lp->tx_ring[tx_index].tag_ctrl_info =
1314                                 cpu_to_le16(vlan_tx_tag_get(skb));
1315
1316         }
1317 #endif
1318         lp->tx_dma_addr[tx_index] =
1319             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1320         lp->tx_ring[tx_index].buff_phy_addr =
1321             cpu_to_le32(lp->tx_dma_addr[tx_index]);
1322
1323         /*  Set FCS and LTINT bits */
1324         wmb();
1325         lp->tx_ring[tx_index].tx_flags |=
1326             cpu_to_le16(OWN_BIT | STP_BIT | ENP_BIT|ADD_FCS_BIT|LTINT_BIT);
1327
1328         lp->tx_idx++;
1329
1330         /* Trigger an immediate send poll. */
1331         writel( VAL1 | TDMD0, lp->mmio + CMD0);
1332         writel( VAL2 | RDMD0,lp->mmio + CMD0);
1333
1334         if(amd8111e_tx_queue_avail(lp) < 0){
1335                 netif_stop_queue(dev);
1336         }
1337         spin_unlock_irqrestore(&lp->lock, flags);
1338         return NETDEV_TX_OK;
1339 }
1340 /*
1341 This function returns all the memory mapped registers of the device.
1342 */
1343 static void amd8111e_read_regs(struct amd8111e_priv *lp, u32 *buf)
1344 {
1345         void __iomem *mmio = lp->mmio;
1346         /* Read only necessary registers */
1347         buf[0] = readl(mmio + XMT_RING_BASE_ADDR0);
1348         buf[1] = readl(mmio + XMT_RING_LEN0);
1349         buf[2] = readl(mmio + RCV_RING_BASE_ADDR0);
1350         buf[3] = readl(mmio + RCV_RING_LEN0);
1351         buf[4] = readl(mmio + CMD0);
1352         buf[5] = readl(mmio + CMD2);
1353         buf[6] = readl(mmio + CMD3);
1354         buf[7] = readl(mmio + CMD7);
1355         buf[8] = readl(mmio + INT0);
1356         buf[9] = readl(mmio + INTEN0);
1357         buf[10] = readl(mmio + LADRF);
1358         buf[11] = readl(mmio + LADRF+4);
1359         buf[12] = readl(mmio + STAT0);
1360 }
1361
1362
1363 /*
1364 This function sets promiscuos mode, all-multi mode or the multicast address
1365 list to the device.
1366 */
1367 static void amd8111e_set_multicast_list(struct net_device *dev)
1368 {
1369         struct netdev_hw_addr *ha;
1370         struct amd8111e_priv *lp = netdev_priv(dev);
1371         u32 mc_filter[2] ;
1372         int bit_num;
1373
1374         if(dev->flags & IFF_PROMISC){
1375                 writel( VAL2 | PROM, lp->mmio + CMD2);
1376                 return;
1377         }
1378         else
1379                 writel( PROM, lp->mmio + CMD2);
1380         if (dev->flags & IFF_ALLMULTI ||
1381             netdev_mc_count(dev) > MAX_FILTER_SIZE) {
1382                 /* get all multicast packet */
1383                 mc_filter[1] = mc_filter[0] = 0xffffffff;
1384                 lp->options |= OPTION_MULTICAST_ENABLE;
1385                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1386                 return;
1387         }
1388         if (netdev_mc_empty(dev)) {
1389                 /* get only own packets */
1390                 mc_filter[1] = mc_filter[0] = 0;
1391                 lp->options &= ~OPTION_MULTICAST_ENABLE;
1392                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1393                 /* disable promiscuous mode */
1394                 writel(PROM, lp->mmio + CMD2);
1395                 return;
1396         }
1397         /* load all the multicast addresses in the logic filter */
1398         lp->options |= OPTION_MULTICAST_ENABLE;
1399         mc_filter[1] = mc_filter[0] = 0;
1400         netdev_for_each_mc_addr(ha, dev) {
1401                 bit_num = (ether_crc_le(ETH_ALEN, ha->addr) >> 26) & 0x3f;
1402                 mc_filter[bit_num >> 5] |= 1 << (bit_num & 31);
1403         }
1404         amd8111e_writeq(*(u64*)mc_filter,lp->mmio+ LADRF);
1405
1406         /* To eliminate PCI posting bug */
1407         readl(lp->mmio + CMD2);
1408
1409 }
1410
1411 static void amd8111e_get_drvinfo(struct net_device* dev, struct ethtool_drvinfo *info)
1412 {
1413         struct amd8111e_priv *lp = netdev_priv(dev);
1414         struct pci_dev *pci_dev = lp->pci_dev;
1415         strcpy (info->driver, MODULE_NAME);
1416         strcpy (info->version, MODULE_VERS);
1417         sprintf(info->fw_version,"%u",chip_version);
1418         strcpy (info->bus_info, pci_name(pci_dev));
1419 }
1420
1421 static int amd8111e_get_regs_len(struct net_device *dev)
1422 {
1423         return AMD8111E_REG_DUMP_LEN;
1424 }
1425
1426 static void amd8111e_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
1427 {
1428         struct amd8111e_priv *lp = netdev_priv(dev);
1429         regs->version = 0;
1430         amd8111e_read_regs(lp, buf);
1431 }
1432
1433 static int amd8111e_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1434 {
1435         struct amd8111e_priv *lp = netdev_priv(dev);
1436         spin_lock_irq(&lp->lock);
1437         mii_ethtool_gset(&lp->mii_if, ecmd);
1438         spin_unlock_irq(&lp->lock);
1439         return 0;
1440 }
1441
1442 static int amd8111e_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1443 {
1444         struct amd8111e_priv *lp = netdev_priv(dev);
1445         int res;
1446         spin_lock_irq(&lp->lock);
1447         res = mii_ethtool_sset(&lp->mii_if, ecmd);
1448         spin_unlock_irq(&lp->lock);
1449         return res;
1450 }
1451
1452 static int amd8111e_nway_reset(struct net_device *dev)
1453 {
1454         struct amd8111e_priv *lp = netdev_priv(dev);
1455         return mii_nway_restart(&lp->mii_if);
1456 }
1457
1458 static u32 amd8111e_get_link(struct net_device *dev)
1459 {
1460         struct amd8111e_priv *lp = netdev_priv(dev);
1461         return mii_link_ok(&lp->mii_if);
1462 }
1463
1464 static void amd8111e_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1465 {
1466         struct amd8111e_priv *lp = netdev_priv(dev);
1467         wol_info->supported = WAKE_MAGIC|WAKE_PHY;
1468         if (lp->options & OPTION_WOL_ENABLE)
1469                 wol_info->wolopts = WAKE_MAGIC;
1470 }
1471
1472 static int amd8111e_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1473 {
1474         struct amd8111e_priv *lp = netdev_priv(dev);
1475         if (wol_info->wolopts & ~(WAKE_MAGIC|WAKE_PHY))
1476                 return -EINVAL;
1477         spin_lock_irq(&lp->lock);
1478         if (wol_info->wolopts & WAKE_MAGIC)
1479                 lp->options |=
1480                         (OPTION_WOL_ENABLE | OPTION_WAKE_MAGIC_ENABLE);
1481         else if(wol_info->wolopts & WAKE_PHY)
1482                 lp->options |=
1483                         (OPTION_WOL_ENABLE | OPTION_WAKE_PHY_ENABLE);
1484         else
1485                 lp->options &= ~OPTION_WOL_ENABLE;
1486         spin_unlock_irq(&lp->lock);
1487         return 0;
1488 }
1489
1490 static const struct ethtool_ops ops = {
1491         .get_drvinfo = amd8111e_get_drvinfo,
1492         .get_regs_len = amd8111e_get_regs_len,
1493         .get_regs = amd8111e_get_regs,
1494         .get_settings = amd8111e_get_settings,
1495         .set_settings = amd8111e_set_settings,
1496         .nway_reset = amd8111e_nway_reset,
1497         .get_link = amd8111e_get_link,
1498         .get_wol = amd8111e_get_wol,
1499         .set_wol = amd8111e_set_wol,
1500 };
1501
1502 /*
1503 This function handles all the  ethtool ioctls. It gives driver info, gets/sets driver speed, gets memory mapped register values, forces auto negotiation, sets/gets WOL options for ethtool application.
1504 */
1505
1506 static int amd8111e_ioctl(struct net_device * dev , struct ifreq *ifr, int cmd)
1507 {
1508         struct mii_ioctl_data *data = if_mii(ifr);
1509         struct amd8111e_priv *lp = netdev_priv(dev);
1510         int err;
1511         u32 mii_regval;
1512
1513         switch(cmd) {
1514         case SIOCGMIIPHY:
1515                 data->phy_id = lp->ext_phy_addr;
1516
1517         /* fallthru */
1518         case SIOCGMIIREG:
1519
1520                 spin_lock_irq(&lp->lock);
1521                 err = amd8111e_read_phy(lp, data->phy_id,
1522                         data->reg_num & PHY_REG_ADDR_MASK, &mii_regval);
1523                 spin_unlock_irq(&lp->lock);
1524
1525                 data->val_out = mii_regval;
1526                 return err;
1527
1528         case SIOCSMIIREG:
1529
1530                 spin_lock_irq(&lp->lock);
1531                 err = amd8111e_write_phy(lp, data->phy_id,
1532                         data->reg_num & PHY_REG_ADDR_MASK, data->val_in);
1533                 spin_unlock_irq(&lp->lock);
1534
1535                 return err;
1536
1537         default:
1538                 /* do nothing */
1539                 break;
1540         }
1541         return -EOPNOTSUPP;
1542 }
1543 static int amd8111e_set_mac_address(struct net_device *dev, void *p)
1544 {
1545         struct amd8111e_priv *lp = netdev_priv(dev);
1546         int i;
1547         struct sockaddr *addr = p;
1548
1549         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1550         spin_lock_irq(&lp->lock);
1551         /* Setting the MAC address to the device */
1552         for(i = 0; i < ETH_ADDR_LEN; i++)
1553                 writeb( dev->dev_addr[i], lp->mmio + PADR + i );
1554
1555         spin_unlock_irq(&lp->lock);
1556
1557         return 0;
1558 }
1559
1560 /*
1561 This function changes the mtu of the device. It restarts the device  to initialize the descriptor with new receive buffers.
1562 */
1563 static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
1564 {
1565         struct amd8111e_priv *lp = netdev_priv(dev);
1566         int err;
1567
1568         if ((new_mtu < AMD8111E_MIN_MTU) || (new_mtu > AMD8111E_MAX_MTU))
1569                 return -EINVAL;
1570
1571         if (!netif_running(dev)) {
1572                 /* new_mtu will be used
1573                    when device starts netxt time */
1574                 dev->mtu = new_mtu;
1575                 return 0;
1576         }
1577
1578         spin_lock_irq(&lp->lock);
1579
1580         /* stop the chip */
1581         writel(RUN, lp->mmio + CMD0);
1582
1583         dev->mtu = new_mtu;
1584
1585         err = amd8111e_restart(dev);
1586         spin_unlock_irq(&lp->lock);
1587         if(!err)
1588                 netif_start_queue(dev);
1589         return err;
1590 }
1591
1592 static int amd8111e_enable_magicpkt(struct amd8111e_priv* lp)
1593 {
1594         writel( VAL1|MPPLBA, lp->mmio + CMD3);
1595         writel( VAL0|MPEN_SW, lp->mmio + CMD7);
1596
1597         /* To eliminate PCI posting bug */
1598         readl(lp->mmio + CMD7);
1599         return 0;
1600 }
1601
1602 static int amd8111e_enable_link_change(struct amd8111e_priv* lp)
1603 {
1604
1605         /* Adapter is already stoped/suspended/interrupt-disabled */
1606         writel(VAL0|LCMODE_SW,lp->mmio + CMD7);
1607
1608         /* To eliminate PCI posting bug */
1609         readl(lp->mmio + CMD7);
1610         return 0;
1611 }
1612
1613 /*
1614  * This function is called when a packet transmission fails to complete
1615  * within a reasonable period, on the assumption that an interrupt have
1616  * failed or the interface is locked up. This function will reinitialize
1617  * the hardware.
1618  */
1619 static void amd8111e_tx_timeout(struct net_device *dev)
1620 {
1621         struct amd8111e_priv* lp = netdev_priv(dev);
1622         int err;
1623
1624         printk(KERN_ERR "%s: transmit timed out, resetting\n",
1625                                                       dev->name);
1626         spin_lock_irq(&lp->lock);
1627         err = amd8111e_restart(dev);
1628         spin_unlock_irq(&lp->lock);
1629         if(!err)
1630                 netif_wake_queue(dev);
1631 }
1632 static int amd8111e_suspend(struct pci_dev *pci_dev, pm_message_t state)
1633 {
1634         struct net_device *dev = pci_get_drvdata(pci_dev);
1635         struct amd8111e_priv *lp = netdev_priv(dev);
1636
1637         if (!netif_running(dev))
1638                 return 0;
1639
1640         /* disable the interrupt */
1641         spin_lock_irq(&lp->lock);
1642         amd8111e_disable_interrupt(lp);
1643         spin_unlock_irq(&lp->lock);
1644
1645         netif_device_detach(dev);
1646
1647         /* stop chip */
1648         spin_lock_irq(&lp->lock);
1649         if(lp->options & OPTION_DYN_IPG_ENABLE)
1650                 del_timer_sync(&lp->ipg_data.ipg_timer);
1651         amd8111e_stop_chip(lp);
1652         spin_unlock_irq(&lp->lock);
1653
1654         if(lp->options & OPTION_WOL_ENABLE){
1655                  /* enable wol */
1656                 if(lp->options & OPTION_WAKE_MAGIC_ENABLE)
1657                         amd8111e_enable_magicpkt(lp);
1658                 if(lp->options & OPTION_WAKE_PHY_ENABLE)
1659                         amd8111e_enable_link_change(lp);
1660
1661                 pci_enable_wake(pci_dev, PCI_D3hot, 1);
1662                 pci_enable_wake(pci_dev, PCI_D3cold, 1);
1663
1664         }
1665         else{
1666                 pci_enable_wake(pci_dev, PCI_D3hot, 0);
1667                 pci_enable_wake(pci_dev, PCI_D3cold, 0);
1668         }
1669
1670         pci_save_state(pci_dev);
1671         pci_set_power_state(pci_dev, PCI_D3hot);
1672
1673         return 0;
1674 }
1675 static int amd8111e_resume(struct pci_dev *pci_dev)
1676 {
1677         struct net_device *dev = pci_get_drvdata(pci_dev);
1678         struct amd8111e_priv *lp = netdev_priv(dev);
1679
1680         if (!netif_running(dev))
1681                 return 0;
1682
1683         pci_set_power_state(pci_dev, PCI_D0);
1684         pci_restore_state(pci_dev);
1685
1686         pci_enable_wake(pci_dev, PCI_D3hot, 0);
1687         pci_enable_wake(pci_dev, PCI_D3cold, 0); /* D3 cold */
1688
1689         netif_device_attach(dev);
1690
1691         spin_lock_irq(&lp->lock);
1692         amd8111e_restart(dev);
1693         /* Restart ipg timer */
1694         if(lp->options & OPTION_DYN_IPG_ENABLE)
1695                 mod_timer(&lp->ipg_data.ipg_timer,
1696                                 jiffies + IPG_CONVERGE_JIFFIES);
1697         spin_unlock_irq(&lp->lock);
1698
1699         return 0;
1700 }
1701
1702
1703 static void __devexit amd8111e_remove_one(struct pci_dev *pdev)
1704 {
1705         struct net_device *dev = pci_get_drvdata(pdev);
1706         if (dev) {
1707                 unregister_netdev(dev);
1708                 iounmap(((struct amd8111e_priv *)netdev_priv(dev))->mmio);
1709                 free_netdev(dev);
1710                 pci_release_regions(pdev);
1711                 pci_disable_device(pdev);
1712                 pci_set_drvdata(pdev, NULL);
1713         }
1714 }
1715 static void amd8111e_config_ipg(struct net_device* dev)
1716 {
1717         struct amd8111e_priv *lp = netdev_priv(dev);
1718         struct ipg_info* ipg_data = &lp->ipg_data;
1719         void __iomem *mmio = lp->mmio;
1720         unsigned int prev_col_cnt = ipg_data->col_cnt;
1721         unsigned int total_col_cnt;
1722         unsigned int tmp_ipg;
1723
1724         if(lp->link_config.duplex == DUPLEX_FULL){
1725                 ipg_data->ipg = DEFAULT_IPG;
1726                 return;
1727         }
1728
1729         if(ipg_data->ipg_state == SSTATE){
1730
1731                 if(ipg_data->timer_tick == IPG_STABLE_TIME){
1732
1733                         ipg_data->timer_tick = 0;
1734                         ipg_data->ipg = MIN_IPG - IPG_STEP;
1735                         ipg_data->current_ipg = MIN_IPG;
1736                         ipg_data->diff_col_cnt = 0xFFFFFFFF;
1737                         ipg_data->ipg_state = CSTATE;
1738                 }
1739                 else
1740                         ipg_data->timer_tick++;
1741         }
1742
1743         if(ipg_data->ipg_state == CSTATE){
1744
1745                 /* Get the current collision count */
1746
1747                 total_col_cnt = ipg_data->col_cnt =
1748                                 amd8111e_read_mib(mmio, xmt_collisions);
1749
1750                 if ((total_col_cnt - prev_col_cnt) <
1751                                 (ipg_data->diff_col_cnt)){
1752
1753                         ipg_data->diff_col_cnt =
1754                                 total_col_cnt - prev_col_cnt ;
1755
1756                         ipg_data->ipg = ipg_data->current_ipg;
1757                 }
1758
1759                 ipg_data->current_ipg += IPG_STEP;
1760
1761                 if (ipg_data->current_ipg <= MAX_IPG)
1762                         tmp_ipg = ipg_data->current_ipg;
1763                 else{
1764                         tmp_ipg = ipg_data->ipg;
1765                         ipg_data->ipg_state = SSTATE;
1766                 }
1767                 writew((u32)tmp_ipg, mmio + IPG);
1768                 writew((u32)(tmp_ipg - IFS1_DELTA), mmio + IFS1);
1769         }
1770          mod_timer(&lp->ipg_data.ipg_timer, jiffies + IPG_CONVERGE_JIFFIES);
1771         return;
1772
1773 }
1774
1775 static void __devinit amd8111e_probe_ext_phy(struct net_device* dev)
1776 {
1777         struct amd8111e_priv *lp = netdev_priv(dev);
1778         int i;
1779
1780         for (i = 0x1e; i >= 0; i--) {
1781                 u32 id1, id2;
1782
1783                 if (amd8111e_read_phy(lp, i, MII_PHYSID1, &id1))
1784                         continue;
1785                 if (amd8111e_read_phy(lp, i, MII_PHYSID2, &id2))
1786                         continue;
1787                 lp->ext_phy_id = (id1 << 16) | id2;
1788                 lp->ext_phy_addr = i;
1789                 return;
1790         }
1791         lp->ext_phy_id = 0;
1792         lp->ext_phy_addr = 1;
1793 }
1794
1795 static const struct net_device_ops amd8111e_netdev_ops = {
1796         .ndo_open               = amd8111e_open,
1797         .ndo_stop               = amd8111e_close,
1798         .ndo_start_xmit         = amd8111e_start_xmit,
1799         .ndo_tx_timeout         = amd8111e_tx_timeout,
1800         .ndo_get_stats          = amd8111e_get_stats,
1801         .ndo_set_multicast_list = amd8111e_set_multicast_list,
1802         .ndo_validate_addr      = eth_validate_addr,
1803         .ndo_set_mac_address    = amd8111e_set_mac_address,
1804         .ndo_do_ioctl           = amd8111e_ioctl,
1805         .ndo_change_mtu         = amd8111e_change_mtu,
1806 #ifdef CONFIG_NET_POLL_CONTROLLER
1807         .ndo_poll_controller     = amd8111e_poll,
1808 #endif
1809 };
1810
1811 static int __devinit amd8111e_probe_one(struct pci_dev *pdev,
1812                                   const struct pci_device_id *ent)
1813 {
1814         int err,i,pm_cap;
1815         unsigned long reg_addr,reg_len;
1816         struct amd8111e_priv* lp;
1817         struct net_device* dev;
1818
1819         err = pci_enable_device(pdev);
1820         if(err){
1821                 printk(KERN_ERR "amd8111e: Cannot enable new PCI device, "
1822                         "exiting.\n");
1823                 return err;
1824         }
1825
1826         if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)){
1827                 printk(KERN_ERR "amd8111e: Cannot find PCI base address, "
1828                        "exiting.\n");
1829                 err = -ENODEV;
1830                 goto err_disable_pdev;
1831         }
1832
1833         err = pci_request_regions(pdev, MODULE_NAME);
1834         if(err){
1835                 printk(KERN_ERR "amd8111e: Cannot obtain PCI resources, "
1836                        "exiting.\n");
1837                 goto err_disable_pdev;
1838         }
1839
1840         pci_set_master(pdev);
1841
1842         /* Find power-management capability. */
1843         if((pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM))==0){
1844                 printk(KERN_ERR "amd8111e: No Power Management capability, "
1845                        "exiting.\n");
1846                 goto err_free_reg;
1847         }
1848
1849         /* Initialize DMA */
1850         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) < 0) {
1851                 printk(KERN_ERR "amd8111e: DMA not supported,"
1852                         "exiting.\n");
1853                 goto err_free_reg;
1854         }
1855
1856         reg_addr = pci_resource_start(pdev, 0);
1857         reg_len = pci_resource_len(pdev, 0);
1858
1859         dev = alloc_etherdev(sizeof(struct amd8111e_priv));
1860         if (!dev) {
1861                 printk(KERN_ERR "amd8111e: Etherdev alloc failed, exiting.\n");
1862                 err = -ENOMEM;
1863                 goto err_free_reg;
1864         }
1865
1866         SET_NETDEV_DEV(dev, &pdev->dev);
1867
1868 #if AMD8111E_VLAN_TAG_USED
1869         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX ;
1870 #endif
1871
1872         lp = netdev_priv(dev);
1873         lp->pci_dev = pdev;
1874         lp->amd8111e_net_dev = dev;
1875         lp->pm_cap = pm_cap;
1876
1877         spin_lock_init(&lp->lock);
1878
1879         lp->mmio = ioremap(reg_addr, reg_len);
1880         if (!lp->mmio) {
1881                 printk(KERN_ERR "amd8111e: Cannot map device registers, "
1882                        "exiting\n");
1883                 err = -ENOMEM;
1884                 goto err_free_dev;
1885         }
1886
1887         /* Initializing MAC address */
1888         for(i = 0; i < ETH_ADDR_LEN; i++)
1889                 dev->dev_addr[i] = readb(lp->mmio + PADR + i);
1890
1891         /* Setting user defined parametrs */
1892         lp->ext_phy_option = speed_duplex[card_idx];
1893         if(coalesce[card_idx])
1894                 lp->options |= OPTION_INTR_COAL_ENABLE;
1895         if(dynamic_ipg[card_idx++])
1896                 lp->options |= OPTION_DYN_IPG_ENABLE;
1897
1898
1899         /* Initialize driver entry points */
1900         dev->netdev_ops = &amd8111e_netdev_ops;
1901         SET_ETHTOOL_OPS(dev, &ops);
1902         dev->irq =pdev->irq;
1903         dev->watchdog_timeo = AMD8111E_TX_TIMEOUT;
1904         netif_napi_add(dev, &lp->napi, amd8111e_rx_poll, 32);
1905
1906 #if AMD8111E_VLAN_TAG_USED
1907         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1908 #endif
1909         /* Probe the external PHY */
1910         amd8111e_probe_ext_phy(dev);
1911
1912         /* setting mii default values */
1913         lp->mii_if.dev = dev;
1914         lp->mii_if.mdio_read = amd8111e_mdio_read;
1915         lp->mii_if.mdio_write = amd8111e_mdio_write;
1916         lp->mii_if.phy_id = lp->ext_phy_addr;
1917
1918         /* Set receive buffer length and set jumbo option*/
1919         amd8111e_set_rx_buff_len(dev);
1920
1921
1922         err = register_netdev(dev);
1923         if (err) {
1924                 printk(KERN_ERR "amd8111e: Cannot register net device, "
1925                        "exiting.\n");
1926                 goto err_iounmap;
1927         }
1928
1929         pci_set_drvdata(pdev, dev);
1930
1931         /* Initialize software ipg timer */
1932         if(lp->options & OPTION_DYN_IPG_ENABLE){
1933                 init_timer(&lp->ipg_data.ipg_timer);
1934                 lp->ipg_data.ipg_timer.data = (unsigned long) dev;
1935                 lp->ipg_data.ipg_timer.function = (void *)&amd8111e_config_ipg;
1936                 lp->ipg_data.ipg_timer.expires = jiffies +
1937                                                  IPG_CONVERGE_JIFFIES;
1938                 lp->ipg_data.ipg = DEFAULT_IPG;
1939                 lp->ipg_data.ipg_state = CSTATE;
1940         }
1941
1942         /*  display driver and device information */
1943
1944         chip_version = (readl(lp->mmio + CHIPID) & 0xf0000000)>>28;
1945         printk(KERN_INFO "%s: AMD-8111e Driver Version: %s\n",
1946                dev->name,MODULE_VERS);
1947         printk(KERN_INFO "%s: [ Rev %x ] PCI 10/100BaseT Ethernet %pM\n",
1948                dev->name, chip_version, dev->dev_addr);
1949         if (lp->ext_phy_id)
1950                 printk(KERN_INFO "%s: Found MII PHY ID 0x%08x at address 0x%02x\n",
1951                        dev->name, lp->ext_phy_id, lp->ext_phy_addr);
1952         else
1953                 printk(KERN_INFO "%s: Couldn't detect MII PHY, assuming address 0x01\n",
1954                        dev->name);
1955         return 0;
1956 err_iounmap:
1957         iounmap(lp->mmio);
1958
1959 err_free_dev:
1960         free_netdev(dev);
1961
1962 err_free_reg:
1963         pci_release_regions(pdev);
1964
1965 err_disable_pdev:
1966         pci_disable_device(pdev);
1967         pci_set_drvdata(pdev, NULL);
1968         return err;
1969
1970 }
1971
1972 static struct pci_driver amd8111e_driver = {
1973         .name           = MODULE_NAME,
1974         .id_table       = amd8111e_pci_tbl,
1975         .probe          = amd8111e_probe_one,
1976         .remove         = __devexit_p(amd8111e_remove_one),
1977         .suspend        = amd8111e_suspend,
1978         .resume         = amd8111e_resume
1979 };
1980
1981 static int __init amd8111e_init(void)
1982 {
1983         return pci_register_driver(&amd8111e_driver);
1984 }
1985
1986 static void __exit amd8111e_cleanup(void)
1987 {
1988         pci_unregister_driver(&amd8111e_driver);
1989 }
1990
1991 module_init(amd8111e_init);
1992 module_exit(amd8111e_cleanup);