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   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/slab.h>
  77 #include <linux/delay.h>
  78 #include <linux/init.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     "3.0.6"
 105 MODULE_AUTHOR("Advanced Micro Devices, Inc.");
 106 MODULE_DESCRIPTION ("AMD8111 based 10/100 Ethernet Controller. Driver Version 3.0.6");
 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 Negotitate, 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 struct pci_device_id 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
 648         /* Free transmit and receive skbs */
 649         amd8111e_free_skbs(lp->amd8111e_net_dev);
 650
 651         /* Free transmit and receive descriptor rings */
 652         if(lp->rx_ring){
 653                 pci_free_consistent(lp->pci_dev,
 654                         sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,
 655                         lp->rx_ring, lp->rx_ring_dma_addr);
 656                 lp->rx_ring = NULL;
 657         }
 658
 659         if(lp->tx_ring){
 660                 pci_free_consistent(lp->pci_dev,
 661                         sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,
 662                         lp->tx_ring, lp->tx_ring_dma_addr);
 663
 664                 lp->tx_ring = NULL;
 665         }
 666
 667 }
 668 #if AMD8111E_VLAN_TAG_USED
 669 /*
 670 This is the receive indication function for packets with vlan tag.
 671 */
 672 static int amd8111e_vlan_rx(struct amd8111e_priv *lp, struct sk_buff *skb, u16 vlan_tag)
 673 {
 674 #ifdef CONFIG_AMD8111E_NAPI
 675         return vlan_hwaccel_receive_skb(skb, lp->vlgrp,vlan_tag);
 676 #else
 677         return vlan_hwaccel_rx(skb, lp->vlgrp, vlan_tag);
 678 #endif /* CONFIG_AMD8111E_NAPI */
 679 }
 680 #endif
 681
 682 /*
 683 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.
 684 */
 685 static int amd8111e_tx(struct net_device *dev)
 686 {
 687         struct amd8111e_priv* lp = netdev_priv(dev);
 688         int tx_index = lp->tx_complete_idx & TX_RING_DR_MOD_MASK;
 689         int status;
 690         /* Complete all the transmit packet */
 691         while (lp->tx_complete_idx != lp->tx_idx){
 692                 tx_index =  lp->tx_complete_idx & TX_RING_DR_MOD_MASK;
 693                 status = le16_to_cpu(lp->tx_ring[tx_index].tx_flags);
 694
 695                 if(status & OWN_BIT)
 696                         break;  /* It still hasn't been Txed */
 697
 698                 lp->tx_ring[tx_index].buff_phy_addr = 0;
 699
 700                 /* We must free the original skb */
 701                 if (lp->tx_skbuff[tx_index]) {
 702                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[tx_index],
 703                                         lp->tx_skbuff[tx_index]->len,
 704                                         PCI_DMA_TODEVICE);
 705                         dev_kfree_skb_irq (lp->tx_skbuff[tx_index]);
 706                         lp->tx_skbuff[tx_index] = NULL;
 707                         lp->tx_dma_addr[tx_index] = 0;
 708                 }
 709                 lp->tx_complete_idx++;
 710                 /*COAL update tx coalescing parameters */
 711                 lp->coal_conf.tx_packets++;
 712                 lp->coal_conf.tx_bytes += lp->tx_ring[tx_index].buff_count;
 713
 714                 if (netif_queue_stopped(dev) &&
 715                         lp->tx_complete_idx > lp->tx_idx - NUM_TX_BUFFERS +2){
 716                         /* The ring is no longer full, clear tbusy. */
 717                         /* lp->tx_full = 0; */
 718                         netif_wake_queue (dev);
 719                 }
 720         }
 721         return 0;
 722 }
 723
 724 #ifdef CONFIG_AMD8111E_NAPI
 725 /* This function handles the driver receive operation in polling mode */
 726 static int amd8111e_rx_poll(struct net_device *dev, int * budget)
 727 {
 728         struct amd8111e_priv *lp = netdev_priv(dev);
 729         int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
 730         void __iomem *mmio = lp->mmio;
 731         struct sk_buff *skb,*new_skb;
 732         int min_pkt_len, status;
 733         unsigned int intr0;
 734         int num_rx_pkt = 0;
 735         /*int max_rx_pkt = NUM_RX_BUFFERS;*/
 736         short pkt_len;
 737 #if AMD8111E_VLAN_TAG_USED
 738         short vtag;
 739 #endif
 740         int rx_pkt_limit = dev->quota;
 741         unsigned long flags;
 742
 743         do{
 744                 /* process receive packets until we use the quota*/
 745                 /* If we own the next entry, it's a new packet. Send it up. */
 746                 while(1) {
 747                         status = le16_to_cpu(lp->rx_ring[rx_index].rx_flags);
 748                         if (status & OWN_BIT)
 749                                 break;
 750
 751                         /*
 752                          * There is a tricky error noted by John Murphy,
 753                          * <murf@perftech.com> to Russ Nelson: Even with
 754                          * full-sized * buffers it's possible for a
 755                          * jabber packet to use two buffers, with only
 756                          * the last correctly noting the error.
 757                          */
 758
 759                         if(status & ERR_BIT) {
 760                                 /* reseting flags */
 761                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 762                                 goto err_next_pkt;
 763                         }
 764                         /* check for STP and ENP */
 765                         if(!((status & STP_BIT) && (status & ENP_BIT))){
 766                                 /* reseting flags */
 767                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 768                                 goto err_next_pkt;
 769                         }
 770                         pkt_len = le16_to_cpu(lp->rx_ring[rx_index].msg_count) - 4;
 771
 772 #if AMD8111E_VLAN_TAG_USED
 773                         vtag = status & TT_MASK;
 774                         /*MAC will strip vlan tag*/
 775                         if(lp->vlgrp != NULL && vtag !=0)
 776                                 min_pkt_len =MIN_PKT_LEN - 4;
 777                         else
 778 #endif
 779                                 min_pkt_len =MIN_PKT_LEN;
 780
 781                         if (pkt_len < min_pkt_len) {
 782                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 783                                 lp->drv_rx_errors++;
 784                                 goto err_next_pkt;
 785                         }
 786                         if(--rx_pkt_limit < 0)
 787                                 goto rx_not_empty;
 788                         if(!(new_skb = dev_alloc_skb(lp->rx_buff_len))){
 789                                 /* if allocation fail,
 790                                    ignore that pkt and go to next one */
 791                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 792                                 lp->drv_rx_errors++;
 793                                 goto err_next_pkt;
 794                         }
 795
 796                         skb_reserve(new_skb, 2);
 797                         skb = lp->rx_skbuff[rx_index];
 798                         pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[rx_index],
 799                                          lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 800                         skb_put(skb, pkt_len);
 801                         skb->dev = dev;
 802                         lp->rx_skbuff[rx_index] = new_skb;
 803                         new_skb->dev = dev;
 804                         lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 805                                                                    new_skb->data,
 806                                                                    lp->rx_buff_len-2,
 807                                                                    PCI_DMA_FROMDEVICE);
 808
 809                         skb->protocol = eth_type_trans(skb, dev);
 810
 811 #if AMD8111E_VLAN_TAG_USED
 812                         if(lp->vlgrp != NULL && (vtag == TT_VLAN_TAGGED)){
 813                                 amd8111e_vlan_rx(lp, skb,
 814                                          le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info));
 815                         } else
 816 #endif
 817                                 netif_receive_skb(skb);
 818                         /*COAL update rx coalescing parameters*/
 819                         lp->coal_conf.rx_packets++;
 820                         lp->coal_conf.rx_bytes += pkt_len;
 821                         num_rx_pkt++;
 822                         dev->last_rx = jiffies;
 823
 824                 err_next_pkt:
 825                         lp->rx_ring[rx_index].buff_phy_addr
 826                                 = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 827                         lp->rx_ring[rx_index].buff_count =
 828                                 cpu_to_le16(lp->rx_buff_len-2);
 829                         wmb();
 830                         lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 831                         rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 832                 }
 833                 /* Check the interrupt status register for more packets in the
 834                    mean time. Process them since we have not used up our quota.*/
 835
 836                 intr0 = readl(mmio + INT0);
 837                 /*Ack receive packets */
 838                 writel(intr0 & RINT0,mmio + INT0);
 839
 840         } while(intr0 & RINT0);
 841
 842         /* Receive descriptor is empty now */
 843         dev->quota -= num_rx_pkt;
 844         *budget -= num_rx_pkt;
 845
 846         spin_lock_irqsave(&lp->lock, flags);
 847         netif_rx_complete(dev);
 848         writel(VAL0|RINTEN0, mmio + INTEN0);
 849         writel(VAL2 | RDMD0, mmio + CMD0);
 850         spin_unlock_irqrestore(&lp->lock, flags);
 851         return 0;
 852
 853 rx_not_empty:
 854         /* Do not call a netif_rx_complete */
 855         dev->quota -= num_rx_pkt;
 856         *budget -= num_rx_pkt;
 857         return 1;
 858 }
 859
 860 #else
 861 /*
 862 This function will check the ownership of receive buffers and descriptors. It will indicate to kernel up to half the number of maximum receive buffers in the descriptor ring, in a single receive interrupt. It will also replenish the descriptors with new skbs.
 863 */
 864 static int amd8111e_rx(struct net_device *dev)
 865 {
 866         struct amd8111e_priv *lp = netdev_priv(dev);
 867         struct sk_buff *skb,*new_skb;
 868         int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
 869         int min_pkt_len, status;
 870         int num_rx_pkt = 0;
 871         int max_rx_pkt = NUM_RX_BUFFERS;
 872         short pkt_len;
 873 #if AMD8111E_VLAN_TAG_USED
 874         short vtag;
 875 #endif
 876
 877         /* If we own the next entry, it's a new packet. Send it up. */
 878         while(++num_rx_pkt <= max_rx_pkt){
 879                 status = le16_to_cpu(lp->rx_ring[rx_index].rx_flags);
 880                 if(status & OWN_BIT)
 881                         return 0;
 882
 883                 /* check if err summary bit is set */
 884                 if(status & ERR_BIT){
 885                         /*
 886                          * There is a tricky error noted by John Murphy,
 887                          * <murf@perftech.com> to Russ Nelson: Even with full-sized
 888                          * buffers it's possible for a jabber packet to use two
 889                          * buffers, with only the last correctly noting the error.                       */
 890                         /* reseting flags */
 891                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 892                         goto err_next_pkt;
 893                 }
 894                 /* check for STP and ENP */
 895                 if(!((status & STP_BIT) && (status & ENP_BIT))){
 896                         /* reseting flags */
 897                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 898                         goto err_next_pkt;
 899                 }
 900                 pkt_len = le16_to_cpu(lp->rx_ring[rx_index].msg_count) - 4;
 901
 902 #if AMD8111E_VLAN_TAG_USED
 903                 vtag = status & TT_MASK;
 904                 /*MAC will strip vlan tag*/
 905                 if(lp->vlgrp != NULL && vtag !=0)
 906                         min_pkt_len =MIN_PKT_LEN - 4;
 907                 else
 908 #endif
 909                         min_pkt_len =MIN_PKT_LEN;
 910
 911                 if (pkt_len < min_pkt_len) {
 912                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 913                         lp->drv_rx_errors++;
 914                         goto err_next_pkt;
 915                 }
 916                 if(!(new_skb = dev_alloc_skb(lp->rx_buff_len))){
 917                         /* if allocation fail,
 918                                 ignore that pkt and go to next one */
 919                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 920                         lp->drv_rx_errors++;
 921                         goto err_next_pkt;
 922                 }
 923
 924                 skb_reserve(new_skb, 2);
 925                 skb = lp->rx_skbuff[rx_index];
 926                 pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[rx_index],
 927                         lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 928                 skb_put(skb, pkt_len);
 929                 skb->dev = dev;
 930                 lp->rx_skbuff[rx_index] = new_skb;
 931                 new_skb->dev = dev;
 932                 lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 933                         new_skb->data, lp->rx_buff_len-2,PCI_DMA_FROMDEVICE);
 934
 935                 skb->protocol = eth_type_trans(skb, dev);
 936
 937 #if AMD8111E_VLAN_TAG_USED
 938                 if(lp->vlgrp != NULL && (vtag == TT_VLAN_TAGGED)){
 939                         amd8111e_vlan_rx(lp, skb,
 940                                  le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info));
 941                 } else
 942 #endif
 943
 944                         netif_rx (skb);
 945                         /*COAL update rx coalescing parameters*/
 946                         lp->coal_conf.rx_packets++;
 947                         lp->coal_conf.rx_bytes += pkt_len;
 948
 949                         dev->last_rx = jiffies;
 950
 951 err_next_pkt:
 952                 lp->rx_ring[rx_index].buff_phy_addr
 953                          = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 954                 lp->rx_ring[rx_index].buff_count =
 955                                 cpu_to_le16(lp->rx_buff_len-2);
 956                 wmb();
 957                 lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 958                 rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 959         }
 960
 961         return 0;
 962 }
 963 #endif /* CONFIG_AMD8111E_NAPI */
 964 /*
 965 This function will indicate the link status to the kernel.
 966 */
 967 static int amd8111e_link_change(struct net_device* dev)
 968 {
 969         struct amd8111e_priv *lp = netdev_priv(dev);
 970         int status0,speed;
 971
 972         /* read the link change */
 973         status0 = readl(lp->mmio + STAT0);
 974
 975         if(status0 & LINK_STATS){
 976                 if(status0 & AUTONEG_COMPLETE)
 977                         lp->link_config.autoneg = AUTONEG_ENABLE;
 978                 else
 979                         lp->link_config.autoneg = AUTONEG_DISABLE;
 980
 981                 if(status0 & FULL_DPLX)
 982                         lp->link_config.duplex = DUPLEX_FULL;
 983                 else
 984                         lp->link_config.duplex = DUPLEX_HALF;
 985                 speed = (status0 & SPEED_MASK) >> 7;
 986                 if(speed == PHY_SPEED_10)
 987                         lp->link_config.speed = SPEED_10;
 988                 else if(speed == PHY_SPEED_100)
 989                         lp->link_config.speed = SPEED_100;
 990
 991                 printk(KERN_INFO "%s: Link is Up. Speed is %s Mbps %s Duplex\n",                        dev->name,
 992                        (lp->link_config.speed == SPEED_100) ? "100": "10",
 993                        (lp->link_config.duplex == DUPLEX_FULL)? "Full": "Half");
 994                 netif_carrier_on(dev);
 995         }
 996         else{
 997                 lp->link_config.speed = SPEED_INVALID;
 998                 lp->link_config.duplex = DUPLEX_INVALID;
 999                 lp->link_config.autoneg = AUTONEG_INVALID;
1000                 printk(KERN_INFO "%s: Link is Down.\n",dev->name);
1001                 netif_carrier_off(dev);
1002         }
1003
1004         return 0;
1005 }
1006 /*
1007 This function reads the mib counters.
1008 */
1009 static int amd8111e_read_mib(void __iomem *mmio, u8 MIB_COUNTER)
1010 {
1011         unsigned int  status;
1012         unsigned  int data;
1013         unsigned int repeat = REPEAT_CNT;
1014
1015         writew( MIB_RD_CMD | MIB_COUNTER, mmio + MIB_ADDR);
1016         do {
1017                 status = readw(mmio + MIB_ADDR);
1018                 udelay(2);      /* controller takes MAX 2 us to get mib data */
1019         }
1020         while (--repeat && (status & MIB_CMD_ACTIVE));
1021
1022         data = readl(mmio + MIB_DATA);
1023         return data;
1024 }
1025
1026 /*
1027 This function reads the mib registers and returns the hardware statistics. It  updates previous internal driver statistics with new values.
1028 */
1029 static struct net_device_stats *amd8111e_get_stats(struct net_device * dev)
1030 {
1031         struct amd8111e_priv *lp = netdev_priv(dev);
1032         void __iomem *mmio = lp->mmio;
1033         unsigned long flags;
1034         /* struct net_device_stats *prev_stats = &lp->prev_stats; */
1035         struct net_device_stats* new_stats = &lp->stats;
1036
1037         if(!lp->opened)
1038                 return &lp->stats;
1039         spin_lock_irqsave (&lp->lock, flags);
1040
1041         /* stats.rx_packets */
1042         new_stats->rx_packets = amd8111e_read_mib(mmio, rcv_broadcast_pkts)+
1043                                 amd8111e_read_mib(mmio, rcv_multicast_pkts)+
1044                                 amd8111e_read_mib(mmio, rcv_unicast_pkts);
1045
1046         /* stats.tx_packets */
1047         new_stats->tx_packets = amd8111e_read_mib(mmio, xmt_packets);
1048
1049         /*stats.rx_bytes */
1050         new_stats->rx_bytes = amd8111e_read_mib(mmio, rcv_octets);
1051
1052         /* stats.tx_bytes */
1053         new_stats->tx_bytes = amd8111e_read_mib(mmio, xmt_octets);
1054
1055         /* stats.rx_errors */
1056         /* hw errors + errors driver reported */
1057         new_stats->rx_errors = amd8111e_read_mib(mmio, rcv_undersize_pkts)+
1058                                 amd8111e_read_mib(mmio, rcv_fragments)+
1059                                 amd8111e_read_mib(mmio, rcv_jabbers)+
1060                                 amd8111e_read_mib(mmio, rcv_alignment_errors)+
1061                                 amd8111e_read_mib(mmio, rcv_fcs_errors)+
1062                                 amd8111e_read_mib(mmio, rcv_miss_pkts)+
1063                                 lp->drv_rx_errors;
1064
1065         /* stats.tx_errors */
1066         new_stats->tx_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
1067
1068         /* stats.rx_dropped*/
1069         new_stats->rx_dropped = amd8111e_read_mib(mmio, rcv_miss_pkts);
1070
1071         /* stats.tx_dropped*/
1072         new_stats->tx_dropped = amd8111e_read_mib(mmio,  xmt_underrun_pkts);
1073
1074         /* stats.multicast*/
1075         new_stats->multicast = amd8111e_read_mib(mmio, rcv_multicast_pkts);
1076
1077         /* stats.collisions*/
1078         new_stats->collisions = amd8111e_read_mib(mmio, xmt_collisions);
1079
1080         /* stats.rx_length_errors*/
1081         new_stats->rx_length_errors =
1082                 amd8111e_read_mib(mmio, rcv_undersize_pkts)+
1083                 amd8111e_read_mib(mmio, rcv_oversize_pkts);
1084
1085         /* stats.rx_over_errors*/
1086         new_stats->rx_over_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1087
1088         /* stats.rx_crc_errors*/
1089         new_stats->rx_crc_errors = amd8111e_read_mib(mmio, rcv_fcs_errors);
1090
1091         /* stats.rx_frame_errors*/
1092         new_stats->rx_frame_errors =
1093                 amd8111e_read_mib(mmio, rcv_alignment_errors);
1094
1095         /* stats.rx_fifo_errors */
1096         new_stats->rx_fifo_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1097
1098         /* stats.rx_missed_errors */
1099         new_stats->rx_missed_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1100
1101         /* stats.tx_aborted_errors*/
1102         new_stats->tx_aborted_errors =
1103                 amd8111e_read_mib(mmio, xmt_excessive_collision);
1104
1105         /* stats.tx_carrier_errors*/
1106         new_stats->tx_carrier_errors =
1107                 amd8111e_read_mib(mmio, xmt_loss_carrier);
1108
1109         /* stats.tx_fifo_errors*/
1110         new_stats->tx_fifo_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
1111
1112         /* stats.tx_window_errors*/
1113         new_stats->tx_window_errors =
1114                 amd8111e_read_mib(mmio, xmt_late_collision);
1115
1116         /* Reset the mibs for collecting new statistics */
1117         /* writew(MIB_CLEAR, mmio + MIB_ADDR);*/
1118
1119         spin_unlock_irqrestore (&lp->lock, flags);
1120
1121         return new_stats;
1122 }
1123 /* This function recalculate the interupt coalescing  mode on every interrupt
1124 according to the datarate and the packet rate.
1125 */
1126 static int amd8111e_calc_coalesce(struct net_device *dev)
1127 {
1128         struct amd8111e_priv *lp = netdev_priv(dev);
1129         struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
1130         int tx_pkt_rate;
1131         int rx_pkt_rate;
1132         int tx_data_rate;
1133         int rx_data_rate;
1134         int rx_pkt_size;
1135         int tx_pkt_size;
1136
1137         tx_pkt_rate = coal_conf->tx_packets - coal_conf->tx_prev_packets;
1138         coal_conf->tx_prev_packets =  coal_conf->tx_packets;
1139
1140         tx_data_rate = coal_conf->tx_bytes - coal_conf->tx_prev_bytes;
1141         coal_conf->tx_prev_bytes =  coal_conf->tx_bytes;
1142
1143         rx_pkt_rate = coal_conf->rx_packets - coal_conf->rx_prev_packets;
1144         coal_conf->rx_prev_packets =  coal_conf->rx_packets;
1145
1146         rx_data_rate = coal_conf->rx_bytes - coal_conf->rx_prev_bytes;
1147         coal_conf->rx_prev_bytes =  coal_conf->rx_bytes;
1148
1149         if(rx_pkt_rate < 800){
1150                 if(coal_conf->rx_coal_type != NO_COALESCE){
1151
1152                         coal_conf->rx_timeout = 0x0;
1153                         coal_conf->rx_event_count = 0;
1154                         amd8111e_set_coalesce(dev,RX_INTR_COAL);
1155                         coal_conf->rx_coal_type = NO_COALESCE;
1156                 }
1157         }
1158         else{
1159
1160                 rx_pkt_size = rx_data_rate/rx_pkt_rate;
1161                 if (rx_pkt_size < 128){
1162                         if(coal_conf->rx_coal_type != NO_COALESCE){
1163
1164                                 coal_conf->rx_timeout = 0;
1165                                 coal_conf->rx_event_count = 0;
1166                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1167                                 coal_conf->rx_coal_type = NO_COALESCE;
1168                         }
1169
1170                 }
1171                 else if ( (rx_pkt_size >= 128) && (rx_pkt_size < 512) ){
1172
1173                         if(coal_conf->rx_coal_type !=  LOW_COALESCE){
1174                                 coal_conf->rx_timeout = 1;
1175                                 coal_conf->rx_event_count = 4;
1176                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1177                                 coal_conf->rx_coal_type = LOW_COALESCE;
1178                         }
1179                 }
1180                 else if ((rx_pkt_size >= 512) && (rx_pkt_size < 1024)){
1181
1182                         if(coal_conf->rx_coal_type !=  MEDIUM_COALESCE){
1183                                 coal_conf->rx_timeout = 1;
1184                                 coal_conf->rx_event_count = 4;
1185                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1186                                 coal_conf->rx_coal_type = MEDIUM_COALESCE;
1187                         }
1188
1189                 }
1190                 else if(rx_pkt_size >= 1024){
1191                         if(coal_conf->rx_coal_type !=  HIGH_COALESCE){
1192                                 coal_conf->rx_timeout = 2;
1193                                 coal_conf->rx_event_count = 3;
1194                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1195                                 coal_conf->rx_coal_type = HIGH_COALESCE;
1196                         }
1197                 }
1198         }
1199         /* NOW FOR TX INTR COALESC */
1200         if(tx_pkt_rate < 800){
1201                 if(coal_conf->tx_coal_type != NO_COALESCE){
1202
1203                         coal_conf->tx_timeout = 0x0;
1204                         coal_conf->tx_event_count = 0;
1205                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1206                         coal_conf->tx_coal_type = NO_COALESCE;
1207                 }
1208         }
1209         else{
1210
1211                 tx_pkt_size = tx_data_rate/tx_pkt_rate;
1212                 if (tx_pkt_size < 128){
1213
1214                         if(coal_conf->tx_coal_type != NO_COALESCE){
1215
1216                                 coal_conf->tx_timeout = 0;
1217                                 coal_conf->tx_event_count = 0;
1218                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1219                                 coal_conf->tx_coal_type = NO_COALESCE;
1220                         }
1221
1222                 }
1223                 else if ( (tx_pkt_size >= 128) && (tx_pkt_size < 512) ){
1224
1225                         if(coal_conf->tx_coal_type !=  LOW_COALESCE){
1226                                 coal_conf->tx_timeout = 1;
1227                                 coal_conf->tx_event_count = 2;
1228                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1229                                 coal_conf->tx_coal_type = LOW_COALESCE;
1230
1231                         }
1232                 }
1233                 else if ((tx_pkt_size >= 512) && (tx_pkt_size < 1024)){
1234
1235                         if(coal_conf->tx_coal_type !=  MEDIUM_COALESCE){
1236                                 coal_conf->tx_timeout = 2;
1237                                 coal_conf->tx_event_count = 5;
1238                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1239                                 coal_conf->tx_coal_type = MEDIUM_COALESCE;
1240                         }
1241
1242                 }
1243                 else if(tx_pkt_size >= 1024){
1244                         if (tx_pkt_size >= 1024){
1245                                 if(coal_conf->tx_coal_type !=  HIGH_COALESCE){
1246                                         coal_conf->tx_timeout = 4;
1247                                         coal_conf->tx_event_count = 8;
1248                                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1249                                         coal_conf->tx_coal_type = HIGH_COALESCE;
1250                                 }
1251                         }
1252                 }
1253         }
1254         return 0;
1255
1256 }
1257 /*
1258 This is device interrupt function. It handles transmit, receive,link change and hardware timer interrupts.
1259 */
1260 static irqreturn_t amd8111e_interrupt(int irq, void *dev_id)
1261 {
1262
1263         struct net_device * dev = (struct net_device *) dev_id;
1264         struct amd8111e_priv *lp = netdev_priv(dev);
1265         void __iomem *mmio = lp->mmio;
1266         unsigned int intr0, intren0;
1267         unsigned int handled = 1;
1268
1269         if(unlikely(dev == NULL))
1270                 return IRQ_NONE;
1271
1272         spin_lock(&lp->lock);
1273
1274         /* disabling interrupt */
1275         writel(INTREN, mmio + CMD0);
1276
1277         /* Read interrupt status */
1278         intr0 = readl(mmio + INT0);
1279         intren0 = readl(mmio + INTEN0);
1280
1281         /* Process all the INT event until INTR bit is clear. */
1282
1283         if (!(intr0 & INTR)){
1284                 handled = 0;
1285                 goto err_no_interrupt;
1286         }
1287
1288         /* Current driver processes 4 interrupts : RINT,TINT,LCINT,STINT */
1289         writel(intr0, mmio + INT0);
1290
1291         /* Check if Receive Interrupt has occurred. */
1292 #ifdef CONFIG_AMD8111E_NAPI
1293         if(intr0 & RINT0){
1294                 if(netif_rx_schedule_prep(dev)){
1295                         /* Disable receive interupts */
1296                         writel(RINTEN0, mmio + INTEN0);
1297                         /* Schedule a polling routine */
1298                         __netif_rx_schedule(dev);
1299                 }
1300                 else if (intren0 & RINTEN0) {
1301                         printk("************Driver bug! \
1302                                 interrupt while in poll\n");
1303                         /* Fix by disable receive interrupts */
1304                         writel(RINTEN0, mmio + INTEN0);
1305                 }
1306         }
1307 #else
1308         if(intr0 & RINT0){
1309                 amd8111e_rx(dev);
1310                 writel(VAL2 | RDMD0, mmio + CMD0);
1311         }
1312 #endif /* CONFIG_AMD8111E_NAPI */
1313         /* Check if  Transmit Interrupt has occurred. */
1314         if(intr0 & TINT0)
1315                 amd8111e_tx(dev);
1316
1317         /* Check if  Link Change Interrupt has occurred. */
1318         if (intr0 & LCINT)
1319                 amd8111e_link_change(dev);
1320
1321         /* Check if Hardware Timer Interrupt has occurred. */
1322         if (intr0 & STINT)
1323                 amd8111e_calc_coalesce(dev);
1324
1325 err_no_interrupt:
1326         writel( VAL0 | INTREN,mmio + CMD0);
1327
1328         spin_unlock(&lp->lock);
1329
1330         return IRQ_RETVAL(handled);
1331 }
1332
1333 #ifdef CONFIG_NET_POLL_CONTROLLER
1334 static void amd8111e_poll(struct net_device *dev)
1335 {
1336         unsigned long flags;
1337         local_save_flags(flags);
1338         local_irq_disable();
1339         amd8111e_interrupt(0, dev);
1340         local_irq_restore(flags);
1341 }
1342 #endif
1343
1344
1345 /*
1346 This function closes the network interface and updates the statistics so that most recent statistics will be available after the interface is down.
1347 */
1348 static int amd8111e_close(struct net_device * dev)
1349 {
1350         struct amd8111e_priv *lp = netdev_priv(dev);
1351         netif_stop_queue(dev);
1352
1353         spin_lock_irq(&lp->lock);
1354
1355         amd8111e_disable_interrupt(lp);
1356         amd8111e_stop_chip(lp);
1357         amd8111e_free_ring(lp);
1358
1359         netif_carrier_off(lp->amd8111e_net_dev);
1360
1361         /* Delete ipg timer */
1362         if(lp->options & OPTION_DYN_IPG_ENABLE)
1363                 del_timer_sync(&lp->ipg_data.ipg_timer);
1364
1365         spin_unlock_irq(&lp->lock);
1366         free_irq(dev->irq, dev);
1367
1368         /* Update the statistics before closing */
1369         amd8111e_get_stats(dev);
1370         lp->opened = 0;
1371         return 0;
1372 }
1373 /* This function opens new interface.It requests irq for the device, initializes the device,buffers and descriptors, and starts the device.
1374 */
1375 static int amd8111e_open(struct net_device * dev )
1376 {
1377         struct amd8111e_priv *lp = netdev_priv(dev);
1378
1379         if(dev->irq ==0 || request_irq(dev->irq, amd8111e_interrupt, IRQF_SHARED,
1380                                          dev->name, dev))
1381                 return -EAGAIN;
1382
1383         spin_lock_irq(&lp->lock);
1384
1385         amd8111e_init_hw_default(lp);
1386
1387         if(amd8111e_restart(dev)){
1388                 spin_unlock_irq(&lp->lock);
1389                 if (dev->irq)
1390                         free_irq(dev->irq, dev);
1391                 return -ENOMEM;
1392         }
1393         /* Start ipg timer */
1394         if(lp->options & OPTION_DYN_IPG_ENABLE){
1395                 add_timer(&lp->ipg_data.ipg_timer);
1396                 printk(KERN_INFO "%s: Dynamic IPG Enabled.\n",dev->name);
1397         }
1398
1399         lp->opened = 1;
1400
1401         spin_unlock_irq(&lp->lock);
1402
1403         netif_start_queue(dev);
1404
1405         return 0;
1406 }
1407 /*
1408 This function checks if there is any transmit  descriptors available to queue more packet.
1409 */
1410 static int amd8111e_tx_queue_avail(struct amd8111e_priv* lp )
1411 {
1412         int tx_index = lp->tx_idx & TX_BUFF_MOD_MASK;
1413         if(lp->tx_skbuff[tx_index] != 0)
1414                 return -1;
1415         else
1416                 return 0;
1417
1418 }
1419 /*
1420 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.
1421 */
1422
1423 static int amd8111e_start_xmit(struct sk_buff *skb, struct net_device * dev)
1424 {
1425         struct amd8111e_priv *lp = netdev_priv(dev);
1426         int tx_index;
1427         unsigned long flags;
1428
1429         spin_lock_irqsave(&lp->lock, flags);
1430
1431         tx_index = lp->tx_idx & TX_RING_DR_MOD_MASK;
1432
1433         lp->tx_ring[tx_index].buff_count = cpu_to_le16(skb->len);
1434
1435         lp->tx_skbuff[tx_index] = skb;
1436         lp->tx_ring[tx_index].tx_flags = 0;
1437
1438 #if AMD8111E_VLAN_TAG_USED
1439         if((lp->vlgrp != NULL) && vlan_tx_tag_present(skb)){
1440                 lp->tx_ring[tx_index].tag_ctrl_cmd |=
1441                                 cpu_to_le16(TCC_VLAN_INSERT);
1442                 lp->tx_ring[tx_index].tag_ctrl_info =
1443                                 cpu_to_le16(vlan_tx_tag_get(skb));
1444
1445         }
1446 #endif
1447         lp->tx_dma_addr[tx_index] =
1448             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1449         lp->tx_ring[tx_index].buff_phy_addr =
1450             (u32) cpu_to_le32(lp->tx_dma_addr[tx_index]);
1451
1452         /*  Set FCS and LTINT bits */
1453         wmb();
1454         lp->tx_ring[tx_index].tx_flags |=
1455             cpu_to_le16(OWN_BIT | STP_BIT | ENP_BIT|ADD_FCS_BIT|LTINT_BIT);
1456
1457         lp->tx_idx++;
1458
1459         /* Trigger an immediate send poll. */
1460         writel( VAL1 | TDMD0, lp->mmio + CMD0);
1461         writel( VAL2 | RDMD0,lp->mmio + CMD0);
1462
1463         dev->trans_start = jiffies;
1464
1465         if(amd8111e_tx_queue_avail(lp) < 0){
1466                 netif_stop_queue(dev);
1467         }
1468         spin_unlock_irqrestore(&lp->lock, flags);
1469         return 0;
1470 }
1471 /*
1472 This function returns all the memory mapped registers of the device.
1473 */
1474 static void amd8111e_read_regs(struct amd8111e_priv *lp, u32 *buf)
1475 {
1476         void __iomem *mmio = lp->mmio;
1477         /* Read only necessary registers */
1478         buf[0] = readl(mmio + XMT_RING_BASE_ADDR0);
1479         buf[1] = readl(mmio + XMT_RING_LEN0);
1480         buf[2] = readl(mmio + RCV_RING_BASE_ADDR0);
1481         buf[3] = readl(mmio + RCV_RING_LEN0);
1482         buf[4] = readl(mmio + CMD0);
1483         buf[5] = readl(mmio + CMD2);
1484         buf[6] = readl(mmio + CMD3);
1485         buf[7] = readl(mmio + CMD7);
1486         buf[8] = readl(mmio + INT0);
1487         buf[9] = readl(mmio + INTEN0);
1488         buf[10] = readl(mmio + LADRF);
1489         buf[11] = readl(mmio + LADRF+4);
1490         buf[12] = readl(mmio + STAT0);
1491 }
1492
1493
1494 /*
1495 This function sets promiscuos mode, all-multi mode or the multicast address
1496 list to the device.
1497 */
1498 static void amd8111e_set_multicast_list(struct net_device *dev)
1499 {
1500         struct dev_mc_list* mc_ptr;
1501         struct amd8111e_priv *lp = netdev_priv(dev);
1502         u32 mc_filter[2] ;
1503         int i,bit_num;
1504         if(dev->flags & IFF_PROMISC){
1505                 writel( VAL2 | PROM, lp->mmio + CMD2);
1506                 return;
1507         }
1508         else
1509                 writel( PROM, lp->mmio + CMD2);
1510         if(dev->flags & IFF_ALLMULTI || dev->mc_count > MAX_FILTER_SIZE){
1511                 /* get all multicast packet */
1512                 mc_filter[1] = mc_filter[0] = 0xffffffff;
1513                 lp->mc_list = dev->mc_list;
1514                 lp->options |= OPTION_MULTICAST_ENABLE;
1515                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1516                 return;
1517         }
1518         if( dev->mc_count == 0 ){
1519                 /* get only own packets */
1520                 mc_filter[1] = mc_filter[0] = 0;
1521                 lp->mc_list = NULL;
1522                 lp->options &= ~OPTION_MULTICAST_ENABLE;
1523                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1524                 /* disable promiscous mode */
1525                 writel(PROM, lp->mmio + CMD2);
1526                 return;
1527         }
1528         /* load all the multicast addresses in the logic filter */
1529         lp->options |= OPTION_MULTICAST_ENABLE;
1530         lp->mc_list = dev->mc_list;
1531         mc_filter[1] = mc_filter[0] = 0;
1532         for (i = 0, mc_ptr = dev->mc_list; mc_ptr && i < dev->mc_count;
1533                      i++, mc_ptr = mc_ptr->next) {
1534                 bit_num = (ether_crc_le(ETH_ALEN, mc_ptr->dmi_addr) >> 26) & 0x3f;
1535                 mc_filter[bit_num >> 5] |= 1 << (bit_num & 31);
1536         }
1537         amd8111e_writeq(*(u64*)mc_filter,lp->mmio+ LADRF);
1538
1539         /* To eliminate PCI posting bug */
1540         readl(lp->mmio + CMD2);
1541
1542 }
1543
1544 static void amd8111e_get_drvinfo(struct net_device* dev, struct ethtool_drvinfo *info)
1545 {
1546         struct amd8111e_priv *lp = netdev_priv(dev);
1547         struct pci_dev *pci_dev = lp->pci_dev;
1548         strcpy (info->driver, MODULE_NAME);
1549         strcpy (info->version, MODULE_VERS);
1550         sprintf(info->fw_version,"%u",chip_version);
1551         strcpy (info->bus_info, pci_name(pci_dev));
1552 }
1553
1554 static int amd8111e_get_regs_len(struct net_device *dev)
1555 {
1556         return AMD8111E_REG_DUMP_LEN;
1557 }
1558
1559 static void amd8111e_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
1560 {
1561         struct amd8111e_priv *lp = netdev_priv(dev);
1562         regs->version = 0;
1563         amd8111e_read_regs(lp, buf);
1564 }
1565
1566 static int amd8111e_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1567 {
1568         struct amd8111e_priv *lp = netdev_priv(dev);
1569         spin_lock_irq(&lp->lock);
1570         mii_ethtool_gset(&lp->mii_if, ecmd);
1571         spin_unlock_irq(&lp->lock);
1572         return 0;
1573 }
1574
1575 static int amd8111e_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1576 {
1577         struct amd8111e_priv *lp = netdev_priv(dev);
1578         int res;
1579         spin_lock_irq(&lp->lock);
1580         res = mii_ethtool_sset(&lp->mii_if, ecmd);
1581         spin_unlock_irq(&lp->lock);
1582         return res;
1583 }
1584
1585 static int amd8111e_nway_reset(struct net_device *dev)
1586 {
1587         struct amd8111e_priv *lp = netdev_priv(dev);
1588         return mii_nway_restart(&lp->mii_if);
1589 }
1590
1591 static u32 amd8111e_get_link(struct net_device *dev)
1592 {
1593         struct amd8111e_priv *lp = netdev_priv(dev);
1594         return mii_link_ok(&lp->mii_if);
1595 }
1596
1597 static void amd8111e_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1598 {
1599         struct amd8111e_priv *lp = netdev_priv(dev);
1600         wol_info->supported = WAKE_MAGIC|WAKE_PHY;
1601         if (lp->options & OPTION_WOL_ENABLE)
1602                 wol_info->wolopts = WAKE_MAGIC;
1603 }
1604
1605 static int amd8111e_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1606 {
1607         struct amd8111e_priv *lp = netdev_priv(dev);
1608         if (wol_info->wolopts & ~(WAKE_MAGIC|WAKE_PHY))
1609                 return -EINVAL;
1610         spin_lock_irq(&lp->lock);
1611         if (wol_info->wolopts & WAKE_MAGIC)
1612                 lp->options |=
1613                         (OPTION_WOL_ENABLE | OPTION_WAKE_MAGIC_ENABLE);
1614         else if(wol_info->wolopts & WAKE_PHY)
1615                 lp->options |=
1616                         (OPTION_WOL_ENABLE | OPTION_WAKE_PHY_ENABLE);
1617         else
1618                 lp->options &= ~OPTION_WOL_ENABLE;
1619         spin_unlock_irq(&lp->lock);
1620         return 0;
1621 }
1622
1623 static const struct ethtool_ops ops = {
1624         .get_drvinfo = amd8111e_get_drvinfo,
1625         .get_regs_len = amd8111e_get_regs_len,
1626         .get_regs = amd8111e_get_regs,
1627         .get_settings = amd8111e_get_settings,
1628         .set_settings = amd8111e_set_settings,
1629         .nway_reset = amd8111e_nway_reset,
1630         .get_link = amd8111e_get_link,
1631         .get_wol = amd8111e_get_wol,
1632         .set_wol = amd8111e_set_wol,
1633 };
1634
1635 /*
1636 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.
1637 */
1638
1639 static int amd8111e_ioctl(struct net_device * dev , struct ifreq *ifr, int cmd)
1640 {
1641         struct mii_ioctl_data *data = if_mii(ifr);
1642         struct amd8111e_priv *lp = netdev_priv(dev);
1643         int err;
1644         u32 mii_regval;
1645
1646         if (!capable(CAP_NET_ADMIN))
1647                 return -EPERM;
1648
1649         switch(cmd) {
1650         case SIOCGMIIPHY:
1651                 data->phy_id = lp->ext_phy_addr;
1652
1653         /* fallthru */
1654         case SIOCGMIIREG:
1655
1656                 spin_lock_irq(&lp->lock);
1657                 err = amd8111e_read_phy(lp, data->phy_id,
1658                         data->reg_num & PHY_REG_ADDR_MASK, &mii_regval);
1659                 spin_unlock_irq(&lp->lock);
1660
1661                 data->val_out = mii_regval;
1662                 return err;
1663
1664         case SIOCSMIIREG:
1665
1666                 spin_lock_irq(&lp->lock);
1667                 err = amd8111e_write_phy(lp, data->phy_id,
1668                         data->reg_num & PHY_REG_ADDR_MASK, data->val_in);
1669                 spin_unlock_irq(&lp->lock);
1670
1671                 return err;
1672
1673         default:
1674                 /* do nothing */
1675                 break;
1676         }
1677         return -EOPNOTSUPP;
1678 }
1679 static int amd8111e_set_mac_address(struct net_device *dev, void *p)
1680 {
1681         struct amd8111e_priv *lp = netdev_priv(dev);
1682         int i;
1683         struct sockaddr *addr = p;
1684
1685         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1686         spin_lock_irq(&lp->lock);
1687         /* Setting the MAC address to the device */
1688         for(i = 0; i < ETH_ADDR_LEN; i++)
1689                 writeb( dev->dev_addr[i], lp->mmio + PADR + i );
1690
1691         spin_unlock_irq(&lp->lock);
1692
1693         return 0;
1694 }
1695
1696 /*
1697 This function changes the mtu of the device. It restarts the device  to initialize the descriptor with new receive buffers.
1698 */
1699 static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
1700 {
1701         struct amd8111e_priv *lp = netdev_priv(dev);
1702         int err;
1703
1704         if ((new_mtu < AMD8111E_MIN_MTU) || (new_mtu > AMD8111E_MAX_MTU))
1705                 return -EINVAL;
1706
1707         if (!netif_running(dev)) {
1708                 /* new_mtu will be used
1709                    when device starts netxt time */
1710                 dev->mtu = new_mtu;
1711                 return 0;
1712         }
1713
1714         spin_lock_irq(&lp->lock);
1715
1716         /* stop the chip */
1717         writel(RUN, lp->mmio + CMD0);
1718
1719         dev->mtu = new_mtu;
1720
1721         err = amd8111e_restart(dev);
1722         spin_unlock_irq(&lp->lock);
1723         if(!err)
1724                 netif_start_queue(dev);
1725         return err;
1726 }
1727
1728 #if AMD8111E_VLAN_TAG_USED
1729 static void amd8111e_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
1730 {
1731         struct  amd8111e_priv *lp = netdev_priv(dev);
1732         spin_lock_irq(&lp->lock);
1733         lp->vlgrp = grp;
1734         spin_unlock_irq(&lp->lock);
1735 }
1736
1737 static void amd8111e_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
1738 {
1739         struct amd8111e_priv *lp = netdev_priv(dev);
1740         spin_lock_irq(&lp->lock);
1741         if (lp->vlgrp)
1742                 lp->vlgrp->vlan_devices[vid] = NULL;
1743         spin_unlock_irq(&lp->lock);
1744 }
1745 #endif
1746 static int amd8111e_enable_magicpkt(struct amd8111e_priv* lp)
1747 {
1748         writel( VAL1|MPPLBA, lp->mmio + CMD3);
1749         writel( VAL0|MPEN_SW, lp->mmio + CMD7);
1750
1751         /* To eliminate PCI posting bug */
1752         readl(lp->mmio + CMD7);
1753         return 0;
1754 }
1755
1756 static int amd8111e_enable_link_change(struct amd8111e_priv* lp)
1757 {
1758
1759         /* Adapter is already stoped/suspended/interrupt-disabled */
1760         writel(VAL0|LCMODE_SW,lp->mmio + CMD7);
1761
1762         /* To eliminate PCI posting bug */
1763         readl(lp->mmio + CMD7);
1764         return 0;
1765 }
1766 /* This function is called when a packet transmission fails to complete within a  resonable period, on the assumption that an interrupts have been failed or the  interface is locked up. This function will reinitialize the hardware */
1767
1768 static void amd8111e_tx_timeout(struct net_device *dev)
1769 {
1770         struct amd8111e_priv* lp = netdev_priv(dev);
1771         int err;
1772
1773         printk(KERN_ERR "%s: transmit timed out, resetting\n",
1774                                                       dev->name);
1775         spin_lock_irq(&lp->lock);
1776         err = amd8111e_restart(dev);
1777         spin_unlock_irq(&lp->lock);
1778         if(!err)
1779                 netif_wake_queue(dev);
1780 }
1781 static int amd8111e_suspend(struct pci_dev *pci_dev, pm_message_t state)
1782 {
1783         struct net_device *dev = pci_get_drvdata(pci_dev);
1784         struct amd8111e_priv *lp = netdev_priv(dev);
1785
1786         if (!netif_running(dev))
1787                 return 0;
1788
1789         /* disable the interrupt */
1790         spin_lock_irq(&lp->lock);
1791         amd8111e_disable_interrupt(lp);
1792         spin_unlock_irq(&lp->lock);
1793
1794         netif_device_detach(dev);
1795
1796         /* stop chip */
1797         spin_lock_irq(&lp->lock);
1798         if(lp->options & OPTION_DYN_IPG_ENABLE)
1799                 del_timer_sync(&lp->ipg_data.ipg_timer);
1800         amd8111e_stop_chip(lp);
1801         spin_unlock_irq(&lp->lock);
1802
1803         if(lp->options & OPTION_WOL_ENABLE){
1804                  /* enable wol */
1805                 if(lp->options & OPTION_WAKE_MAGIC_ENABLE)
1806                         amd8111e_enable_magicpkt(lp);
1807                 if(lp->options & OPTION_WAKE_PHY_ENABLE)
1808                         amd8111e_enable_link_change(lp);
1809
1810                 pci_enable_wake(pci_dev, PCI_D3hot, 1);
1811                 pci_enable_wake(pci_dev, PCI_D3cold, 1);
1812
1813         }
1814         else{
1815                 pci_enable_wake(pci_dev, PCI_D3hot, 0);
1816                 pci_enable_wake(pci_dev, PCI_D3cold, 0);
1817         }
1818
1819         pci_save_state(pci_dev);
1820         pci_set_power_state(pci_dev, PCI_D3hot);
1821
1822         return 0;
1823 }
1824 static int amd8111e_resume(struct pci_dev *pci_dev)
1825 {
1826         struct net_device *dev = pci_get_drvdata(pci_dev);
1827         struct amd8111e_priv *lp = netdev_priv(dev);
1828
1829         if (!netif_running(dev))
1830                 return 0;
1831
1832         pci_set_power_state(pci_dev, PCI_D0);
1833         pci_restore_state(pci_dev);
1834
1835         pci_enable_wake(pci_dev, PCI_D3hot, 0);
1836         pci_enable_wake(pci_dev, PCI_D3cold, 0); /* D3 cold */
1837
1838         netif_device_attach(dev);
1839
1840         spin_lock_irq(&lp->lock);
1841         amd8111e_restart(dev);
1842         /* Restart ipg timer */
1843         if(lp->options & OPTION_DYN_IPG_ENABLE)
1844                 mod_timer(&lp->ipg_data.ipg_timer,
1845                                 jiffies + IPG_CONVERGE_JIFFIES);
1846         spin_unlock_irq(&lp->lock);
1847
1848         return 0;
1849 }
1850
1851
1852 static void __devexit amd8111e_remove_one(struct pci_dev *pdev)
1853 {
1854         struct net_device *dev = pci_get_drvdata(pdev);
1855         if (dev) {
1856                 unregister_netdev(dev);
1857                 iounmap(((struct amd8111e_priv *)netdev_priv(dev))->mmio);
1858                 free_netdev(dev);
1859                 pci_release_regions(pdev);
1860                 pci_disable_device(pdev);
1861                 pci_set_drvdata(pdev, NULL);
1862         }
1863 }
1864 static void amd8111e_config_ipg(struct net_device* dev)
1865 {
1866         struct amd8111e_priv *lp = netdev_priv(dev);
1867         struct ipg_info* ipg_data = &lp->ipg_data;
1868         void __iomem *mmio = lp->mmio;
1869         unsigned int prev_col_cnt = ipg_data->col_cnt;
1870         unsigned int total_col_cnt;
1871         unsigned int tmp_ipg;
1872
1873         if(lp->link_config.duplex == DUPLEX_FULL){
1874                 ipg_data->ipg = DEFAULT_IPG;
1875                 return;
1876         }
1877
1878         if(ipg_data->ipg_state == SSTATE){
1879
1880                 if(ipg_data->timer_tick == IPG_STABLE_TIME){
1881
1882                         ipg_data->timer_tick = 0;
1883                         ipg_data->ipg = MIN_IPG - IPG_STEP;
1884                         ipg_data->current_ipg = MIN_IPG;
1885                         ipg_data->diff_col_cnt = 0xFFFFFFFF;
1886                         ipg_data->ipg_state = CSTATE;
1887                 }
1888                 else
1889                         ipg_data->timer_tick++;
1890         }
1891
1892         if(ipg_data->ipg_state == CSTATE){
1893
1894                 /* Get the current collision count */
1895
1896                 total_col_cnt = ipg_data->col_cnt =
1897                                 amd8111e_read_mib(mmio, xmt_collisions);
1898
1899                 if ((total_col_cnt - prev_col_cnt) <
1900                                 (ipg_data->diff_col_cnt)){
1901
1902                         ipg_data->diff_col_cnt =
1903                                 total_col_cnt - prev_col_cnt ;
1904
1905                         ipg_data->ipg = ipg_data->current_ipg;
1906                 }
1907
1908                 ipg_data->current_ipg += IPG_STEP;
1909
1910                 if (ipg_data->current_ipg <= MAX_IPG)
1911                         tmp_ipg = ipg_data->current_ipg;
1912                 else{
1913                         tmp_ipg = ipg_data->ipg;
1914                         ipg_data->ipg_state = SSTATE;
1915                 }
1916                 writew((u32)tmp_ipg, mmio + IPG);
1917                 writew((u32)(tmp_ipg - IFS1_DELTA), mmio + IFS1);
1918         }
1919          mod_timer(&lp->ipg_data.ipg_timer, jiffies + IPG_CONVERGE_JIFFIES);
1920         return;
1921
1922 }
1923
1924 static void __devinit amd8111e_probe_ext_phy(struct net_device* dev)
1925 {
1926         struct amd8111e_priv *lp = netdev_priv(dev);
1927         int i;
1928
1929         for (i = 0x1e; i >= 0; i--) {
1930                 u32 id1, id2;
1931
1932                 if (amd8111e_read_phy(lp, i, MII_PHYSID1, &id1))
1933                         continue;
1934                 if (amd8111e_read_phy(lp, i, MII_PHYSID2, &id2))
1935                         continue;
1936                 lp->ext_phy_id = (id1 << 16) | id2;
1937                 lp->ext_phy_addr = i;
1938                 return;
1939         }
1940         lp->ext_phy_id = 0;
1941         lp->ext_phy_addr = 1;
1942 }
1943
1944 static int __devinit amd8111e_probe_one(struct pci_dev *pdev,
1945                                   const struct pci_device_id *ent)
1946 {
1947         int err,i,pm_cap;
1948         unsigned long reg_addr,reg_len;
1949         struct amd8111e_priv* lp;
1950         struct net_device* dev;
1951
1952         err = pci_enable_device(pdev);
1953         if(err){
1954                 printk(KERN_ERR "amd8111e: Cannot enable new PCI device,"
1955                         "exiting.\n");
1956                 return err;
1957         }
1958
1959         if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)){
1960                 printk(KERN_ERR "amd8111e: Cannot find PCI base address"
1961                        "exiting.\n");
1962                 err = -ENODEV;
1963                 goto err_disable_pdev;
1964         }
1965
1966         err = pci_request_regions(pdev, MODULE_NAME);
1967         if(err){
1968                 printk(KERN_ERR "amd8111e: Cannot obtain PCI resources, "
1969                        "exiting.\n");
1970                 goto err_disable_pdev;
1971         }
1972
1973         pci_set_master(pdev);
1974
1975         /* Find power-management capability. */
1976         if((pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM))==0){
1977                 printk(KERN_ERR "amd8111e: No Power Management capability, "
1978                        "exiting.\n");
1979                 goto err_free_reg;
1980         }
1981
1982         /* Initialize DMA */
1983         if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) < 0) {
1984                 printk(KERN_ERR "amd8111e: DMA not supported,"
1985                         "exiting.\n");
1986                 goto err_free_reg;
1987         }
1988
1989         reg_addr = pci_resource_start(pdev, 0);
1990         reg_len = pci_resource_len(pdev, 0);
1991
1992         dev = alloc_etherdev(sizeof(struct amd8111e_priv));
1993         if (!dev) {
1994                 printk(KERN_ERR "amd8111e: Etherdev alloc failed, exiting.\n");
1995                 err = -ENOMEM;
1996                 goto err_free_reg;
1997         }
1998
1999         SET_MODULE_OWNER(dev);
2000         SET_NETDEV_DEV(dev, &pdev->dev);
2001
2002 #if AMD8111E_VLAN_TAG_USED
2003         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX ;
2004         dev->vlan_rx_register =amd8111e_vlan_rx_register;
2005         dev->vlan_rx_kill_vid = amd8111e_vlan_rx_kill_vid;
2006 #endif
2007
2008         lp = netdev_priv(dev);
2009         lp->pci_dev = pdev;
2010         lp->amd8111e_net_dev = dev;
2011         lp->pm_cap = pm_cap;
2012
2013         spin_lock_init(&lp->lock);
2014
2015         lp->mmio = ioremap(reg_addr, reg_len);
2016         if (lp->mmio == 0) {
2017                 printk(KERN_ERR "amd8111e: Cannot map device registers, "
2018                        "exiting\n");
2019                 err = -ENOMEM;
2020                 goto err_free_dev;
2021         }
2022
2023         /* Initializing MAC address */
2024         for(i = 0; i < ETH_ADDR_LEN; i++)
2025                         dev->dev_addr[i] =readb(lp->mmio + PADR + i);
2026
2027         /* Setting user defined parametrs */
2028         lp->ext_phy_option = speed_duplex[card_idx];
2029         if(coalesce[card_idx])
2030                 lp->options |= OPTION_INTR_COAL_ENABLE;
2031         if(dynamic_ipg[card_idx++])
2032                 lp->options |= OPTION_DYN_IPG_ENABLE;
2033
2034         /* Initialize driver entry points */
2035         dev->open = amd8111e_open;
2036         dev->hard_start_xmit = amd8111e_start_xmit;
2037         dev->stop = amd8111e_close;
2038         dev->get_stats = amd8111e_get_stats;
2039         dev->set_multicast_list = amd8111e_set_multicast_list;
2040         dev->set_mac_address = amd8111e_set_mac_address;
2041         dev->do_ioctl = amd8111e_ioctl;
2042         dev->change_mtu = amd8111e_change_mtu;
2043         SET_ETHTOOL_OPS(dev, &ops);
2044         dev->irq =pdev->irq;
2045         dev->tx_timeout = amd8111e_tx_timeout;
2046         dev->watchdog_timeo = AMD8111E_TX_TIMEOUT;
2047 #ifdef CONFIG_AMD8111E_NAPI
2048         dev->poll = amd8111e_rx_poll;
2049         dev->weight = 32;
2050 #endif
2051 #ifdef CONFIG_NET_POLL_CONTROLLER
2052         dev->poll_controller = amd8111e_poll;
2053 #endif
2054
2055 #if AMD8111E_VLAN_TAG_USED
2056         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2057         dev->vlan_rx_register =amd8111e_vlan_rx_register;
2058         dev->vlan_rx_kill_vid = amd8111e_vlan_rx_kill_vid;
2059 #endif
2060         /* Probe the external PHY */
2061         amd8111e_probe_ext_phy(dev);
2062
2063         /* setting mii default values */
2064         lp->mii_if.dev = dev;
2065         lp->mii_if.mdio_read = amd8111e_mdio_read;
2066         lp->mii_if.mdio_write = amd8111e_mdio_write;
2067         lp->mii_if.phy_id = lp->ext_phy_addr;
2068
2069         /* Set receive buffer length and set jumbo option*/
2070         amd8111e_set_rx_buff_len(dev);
2071
2072
2073         err = register_netdev(dev);
2074         if (err) {
2075                 printk(KERN_ERR "amd8111e: Cannot register net device, "
2076                        "exiting.\n");
2077                 goto err_iounmap;
2078         }
2079
2080         pci_set_drvdata(pdev, dev);
2081
2082         /* Initialize software ipg timer */
2083         if(lp->options & OPTION_DYN_IPG_ENABLE){
2084                 init_timer(&lp->ipg_data.ipg_timer);
2085                 lp->ipg_data.ipg_timer.data = (unsigned long) dev;
2086                 lp->ipg_data.ipg_timer.function = (void *)&amd8111e_config_ipg;
2087                 lp->ipg_data.ipg_timer.expires = jiffies +
2088                                                  IPG_CONVERGE_JIFFIES;
2089                 lp->ipg_data.ipg = DEFAULT_IPG;
2090                 lp->ipg_data.ipg_state = CSTATE;
2091         };
2092
2093         /*  display driver and device information */
2094
2095         chip_version = (readl(lp->mmio + CHIPID) & 0xf0000000)>>28;
2096         printk(KERN_INFO "%s: AMD-8111e Driver Version: %s\n",                                                           dev->name,MODULE_VERS);
2097         printk(KERN_INFO "%s: [ Rev %x ] PCI 10/100BaseT Ethernet ",                                                    dev->name, chip_version);
2098         for (i = 0; i < 6; i++)
2099                 printk("%2.2x%c",dev->dev_addr[i],i == 5 ? ' ' : ':');
2100         printk( "\n");
2101         if (lp->ext_phy_id)
2102                 printk(KERN_INFO "%s: Found MII PHY ID 0x%08x at address 0x%02x\n",
2103                        dev->name, lp->ext_phy_id, lp->ext_phy_addr);
2104         else
2105                 printk(KERN_INFO "%s: Couldn't detect MII PHY, assuming address 0x01\n",
2106                        dev->name);
2107         return 0;
2108 err_iounmap:
2109         iounmap(lp->mmio);
2110
2111 err_free_dev:
2112         free_netdev(dev);
2113
2114 err_free_reg:
2115         pci_release_regions(pdev);
2116
2117 err_disable_pdev:
2118         pci_disable_device(pdev);
2119         pci_set_drvdata(pdev, NULL);
2120         return err;
2121
2122 }
2123
2124 static struct pci_driver amd8111e_driver = {
2125         .name           = MODULE_NAME,
2126         .id_table       = amd8111e_pci_tbl,
2127         .probe          = amd8111e_probe_one,
2128         .remove         = __devexit_p(amd8111e_remove_one),
2129         .suspend        = amd8111e_suspend,
2130         .resume         = amd8111e_resume
2131 };
2132
2133 static int __init amd8111e_init(void)
2134 {
2135         return pci_register_driver(&amd8111e_driver);
2136 }
2137
2138 static void __exit amd8111e_cleanup(void)
2139 {
2140         pci_unregister_driver(&amd8111e_driver);
2141 }
2142
2143 module_init(amd8111e_init);
2144 module_exit(amd8111e_cleanup);