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