git.oblomov.eu Git - linux-2.6/blob - drivers/net/amd8111e.c

   1
   2 /* Advanced  Micro Devices Inc. AMD8111E Linux Network Driver
   3  * Copyright (C) 2004 Advanced Micro Devices
   4  *
   5  *
   6  * Copyright 2001,2002 Jeff Garzik <jgarzik@mandrakesoft.com> [ 8139cp.c,tg3.c ]
   7  * Copyright (C) 2001, 2002 David S. Miller (davem@redhat.com)[ tg3.c]
   8  * Copyright 1996-1999 Thomas Bogendoerfer [ pcnet32.c ]
   9  * Derived from the lance driver written 1993,1994,1995 by Donald Becker.
  10  * Copyright 1993 United States Government as represented by the
  11  *      Director, National Security Agency.[ pcnet32.c ]
  12  * Carsten Langgaard, carstenl@mips.com [ pcnet32.c ]
  13  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
  14  *
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  29  * USA
  30
  31 Module Name:
  32
  33         amd8111e.c
  34
  35 Abstract:
  36
  37          AMD8111 based 10/100 Ethernet Controller Driver.
  38
  39 Environment:
  40
  41         Kernel Mode
  42
  43 Revision History:
  44         3.0.0
  45            Initial Revision.
  46         3.0.1
  47          1. Dynamic interrupt coalescing.
  48          2. Removed prev_stats.
  49          3. MII support.
  50          4. Dynamic IPG support
  51         3.0.2  05/29/2003
  52          1. Bug fix: Fixed failure to send jumbo packets larger than 4k.
  53          2. Bug fix: Fixed VLAN support failure.
  54          3. Bug fix: Fixed receive interrupt coalescing bug.
  55          4. Dynamic IPG support is disabled by default.
  56         3.0.3 06/05/2003
  57          1. Bug fix: Fixed failure to close the interface if SMP is enabled.
  58         3.0.4 12/09/2003
  59          1. Added set_mac_address routine for bonding driver support.
  60          2. Tested the driver for bonding support
  61          3. Bug fix: Fixed mismach in actual receive buffer lenth and lenth
  62             indicated to the h/w.
  63          4. Modified amd8111e_rx() routine to receive all the received packets
  64             in the first interrupt.
  65          5. Bug fix: Corrected  rx_errors  reported in get_stats() function.
  66         3.0.5 03/22/2004
  67          1. Added NAPI support
  68
  69 */
  70
  71
  72 #include <linux/module.h>
  73 #include <linux/kernel.h>
  74 #include <linux/types.h>
  75 #include <linux/compiler.h>
  76 #include <linux/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                         lp->rx_skbuff[rx_index] = new_skb;
 802                         lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 803                                                                    new_skb->data,
 804                                                                    lp->rx_buff_len-2,
 805                                                                    PCI_DMA_FROMDEVICE);
 806
 807                         skb->protocol = eth_type_trans(skb, dev);
 808
 809 #if AMD8111E_VLAN_TAG_USED
 810                         if(lp->vlgrp != NULL && (vtag == TT_VLAN_TAGGED)){
 811                                 amd8111e_vlan_rx(lp, skb,
 812                                          le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info));
 813                         } else
 814 #endif
 815                                 netif_receive_skb(skb);
 816                         /*COAL update rx coalescing parameters*/
 817                         lp->coal_conf.rx_packets++;
 818                         lp->coal_conf.rx_bytes += pkt_len;
 819                         num_rx_pkt++;
 820                         dev->last_rx = jiffies;
 821
 822                 err_next_pkt:
 823                         lp->rx_ring[rx_index].buff_phy_addr
 824                                 = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 825                         lp->rx_ring[rx_index].buff_count =
 826                                 cpu_to_le16(lp->rx_buff_len-2);
 827                         wmb();
 828                         lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 829                         rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 830                 }
 831                 /* Check the interrupt status register for more packets in the
 832                    mean time. Process them since we have not used up our quota.*/
 833
 834                 intr0 = readl(mmio + INT0);
 835                 /*Ack receive packets */
 836                 writel(intr0 & RINT0,mmio + INT0);
 837
 838         } while(intr0 & RINT0);
 839
 840         /* Receive descriptor is empty now */
 841         dev->quota -= num_rx_pkt;
 842         *budget -= num_rx_pkt;
 843
 844         spin_lock_irqsave(&lp->lock, flags);
 845         netif_rx_complete(dev);
 846         writel(VAL0|RINTEN0, mmio + INTEN0);
 847         writel(VAL2 | RDMD0, mmio + CMD0);
 848         spin_unlock_irqrestore(&lp->lock, flags);
 849         return 0;
 850
 851 rx_not_empty:
 852         /* Do not call a netif_rx_complete */
 853         dev->quota -= num_rx_pkt;
 854         *budget -= num_rx_pkt;
 855         return 1;
 856 }
 857
 858 #else
 859 /*
 860 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.
 861 */
 862 static int amd8111e_rx(struct net_device *dev)
 863 {
 864         struct amd8111e_priv *lp = netdev_priv(dev);
 865         struct sk_buff *skb,*new_skb;
 866         int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
 867         int min_pkt_len, status;
 868         int num_rx_pkt = 0;
 869         int max_rx_pkt = NUM_RX_BUFFERS;
 870         short pkt_len;
 871 #if AMD8111E_VLAN_TAG_USED
 872         short vtag;
 873 #endif
 874
 875         /* If we own the next entry, it's a new packet. Send it up. */
 876         while(++num_rx_pkt <= max_rx_pkt){
 877                 status = le16_to_cpu(lp->rx_ring[rx_index].rx_flags);
 878                 if(status & OWN_BIT)
 879                         return 0;
 880
 881                 /* check if err summary bit is set */
 882                 if(status & ERR_BIT){
 883                         /*
 884                          * There is a tricky error noted by John Murphy,
 885                          * <murf@perftech.com> to Russ Nelson: Even with full-sized
 886                          * buffers it's possible for a jabber packet to use two
 887                          * buffers, with only the last correctly noting the error.                       */
 888                         /* reseting flags */
 889                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 890                         goto err_next_pkt;
 891                 }
 892                 /* check for STP and ENP */
 893                 if(!((status & STP_BIT) && (status & ENP_BIT))){
 894                         /* reseting flags */
 895                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 896                         goto err_next_pkt;
 897                 }
 898                 pkt_len = le16_to_cpu(lp->rx_ring[rx_index].msg_count) - 4;
 899
 900 #if AMD8111E_VLAN_TAG_USED
 901                 vtag = status & TT_MASK;
 902                 /*MAC will strip vlan tag*/
 903                 if(lp->vlgrp != NULL && vtag !=0)
 904                         min_pkt_len =MIN_PKT_LEN - 4;
 905                 else
 906 #endif
 907                         min_pkt_len =MIN_PKT_LEN;
 908
 909                 if (pkt_len < min_pkt_len) {
 910                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 911                         lp->drv_rx_errors++;
 912                         goto err_next_pkt;
 913                 }
 914                 if(!(new_skb = dev_alloc_skb(lp->rx_buff_len))){
 915                         /* if allocation fail,
 916                                 ignore that pkt and go to next one */
 917                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 918                         lp->drv_rx_errors++;
 919                         goto err_next_pkt;
 920                 }
 921
 922                 skb_reserve(new_skb, 2);
 923                 skb = lp->rx_skbuff[rx_index];
 924                 pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[rx_index],
 925                         lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 926                 skb_put(skb, pkt_len);
 927                 lp->rx_skbuff[rx_index] = new_skb;
 928                 lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 929                         new_skb->data, lp->rx_buff_len-2,PCI_DMA_FROMDEVICE);
 930
 931                 skb->protocol = eth_type_trans(skb, dev);
 932
 933 #if AMD8111E_VLAN_TAG_USED
 934                 if(lp->vlgrp != NULL && (vtag == TT_VLAN_TAGGED)){
 935                         amd8111e_vlan_rx(lp, skb,
 936                                  le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info));
 937                 } else
 938 #endif
 939
 940                         netif_rx (skb);
 941                         /*COAL update rx coalescing parameters*/
 942                         lp->coal_conf.rx_packets++;
 943                         lp->coal_conf.rx_bytes += pkt_len;
 944
 945                         dev->last_rx = jiffies;
 946
 947 err_next_pkt:
 948                 lp->rx_ring[rx_index].buff_phy_addr
 949                          = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 950                 lp->rx_ring[rx_index].buff_count =
 951                                 cpu_to_le16(lp->rx_buff_len-2);
 952                 wmb();
 953                 lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 954                 rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 955         }
 956
 957         return 0;
 958 }
 959 #endif /* CONFIG_AMD8111E_NAPI */
 960 /*
 961 This function will indicate the link status to the kernel.
 962 */
 963 static int amd8111e_link_change(struct net_device* dev)
 964 {
 965         struct amd8111e_priv *lp = netdev_priv(dev);
 966         int status0,speed;
 967
 968         /* read the link change */
 969         status0 = readl(lp->mmio + STAT0);
 970
 971         if(status0 & LINK_STATS){
 972                 if(status0 & AUTONEG_COMPLETE)
 973                         lp->link_config.autoneg = AUTONEG_ENABLE;
 974                 else
 975                         lp->link_config.autoneg = AUTONEG_DISABLE;
 976
 977                 if(status0 & FULL_DPLX)
 978                         lp->link_config.duplex = DUPLEX_FULL;
 979                 else
 980                         lp->link_config.duplex = DUPLEX_HALF;
 981                 speed = (status0 & SPEED_MASK) >> 7;
 982                 if(speed == PHY_SPEED_10)
 983                         lp->link_config.speed = SPEED_10;
 984                 else if(speed == PHY_SPEED_100)
 985                         lp->link_config.speed = SPEED_100;
 986
 987                 printk(KERN_INFO "%s: Link is Up. Speed is %s Mbps %s Duplex\n",                        dev->name,
 988                        (lp->link_config.speed == SPEED_100) ? "100": "10",
 989                        (lp->link_config.duplex == DUPLEX_FULL)? "Full": "Half");
 990                 netif_carrier_on(dev);
 991         }
 992         else{
 993                 lp->link_config.speed = SPEED_INVALID;
 994                 lp->link_config.duplex = DUPLEX_INVALID;
 995                 lp->link_config.autoneg = AUTONEG_INVALID;
 996                 printk(KERN_INFO "%s: Link is Down.\n",dev->name);
 997                 netif_carrier_off(dev);
 998         }
 999
1000         return 0;
1001 }
1002 /*
1003 This function reads the mib counters.
1004 */
1005 static int amd8111e_read_mib(void __iomem *mmio, u8 MIB_COUNTER)
1006 {
1007         unsigned int  status;
1008         unsigned  int data;
1009         unsigned int repeat = REPEAT_CNT;
1010
1011         writew( MIB_RD_CMD | MIB_COUNTER, mmio + MIB_ADDR);
1012         do {
1013                 status = readw(mmio + MIB_ADDR);
1014                 udelay(2);      /* controller takes MAX 2 us to get mib data */
1015         }
1016         while (--repeat && (status & MIB_CMD_ACTIVE));
1017
1018         data = readl(mmio + MIB_DATA);
1019         return data;
1020 }
1021
1022 /*
1023 This function reads the mib registers and returns the hardware statistics. It  updates previous internal driver statistics with new values.
1024 */
1025 static struct net_device_stats *amd8111e_get_stats(struct net_device * dev)
1026 {
1027         struct amd8111e_priv *lp = netdev_priv(dev);
1028         void __iomem *mmio = lp->mmio;
1029         unsigned long flags;
1030         /* struct net_device_stats *prev_stats = &lp->prev_stats; */
1031         struct net_device_stats* new_stats = &lp->stats;
1032
1033         if(!lp->opened)
1034                 return &lp->stats;
1035         spin_lock_irqsave (&lp->lock, flags);
1036
1037         /* stats.rx_packets */
1038         new_stats->rx_packets = amd8111e_read_mib(mmio, rcv_broadcast_pkts)+
1039                                 amd8111e_read_mib(mmio, rcv_multicast_pkts)+
1040                                 amd8111e_read_mib(mmio, rcv_unicast_pkts);
1041
1042         /* stats.tx_packets */
1043         new_stats->tx_packets = amd8111e_read_mib(mmio, xmt_packets);
1044
1045         /*stats.rx_bytes */
1046         new_stats->rx_bytes = amd8111e_read_mib(mmio, rcv_octets);
1047
1048         /* stats.tx_bytes */
1049         new_stats->tx_bytes = amd8111e_read_mib(mmio, xmt_octets);
1050
1051         /* stats.rx_errors */
1052         /* hw errors + errors driver reported */
1053         new_stats->rx_errors = amd8111e_read_mib(mmio, rcv_undersize_pkts)+
1054                                 amd8111e_read_mib(mmio, rcv_fragments)+
1055                                 amd8111e_read_mib(mmio, rcv_jabbers)+
1056                                 amd8111e_read_mib(mmio, rcv_alignment_errors)+
1057                                 amd8111e_read_mib(mmio, rcv_fcs_errors)+
1058                                 amd8111e_read_mib(mmio, rcv_miss_pkts)+
1059                                 lp->drv_rx_errors;
1060
1061         /* stats.tx_errors */
1062         new_stats->tx_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
1063
1064         /* stats.rx_dropped*/
1065         new_stats->rx_dropped = amd8111e_read_mib(mmio, rcv_miss_pkts);
1066
1067         /* stats.tx_dropped*/
1068         new_stats->tx_dropped = amd8111e_read_mib(mmio,  xmt_underrun_pkts);
1069
1070         /* stats.multicast*/
1071         new_stats->multicast = amd8111e_read_mib(mmio, rcv_multicast_pkts);
1072
1073         /* stats.collisions*/
1074         new_stats->collisions = amd8111e_read_mib(mmio, xmt_collisions);
1075
1076         /* stats.rx_length_errors*/
1077         new_stats->rx_length_errors =
1078                 amd8111e_read_mib(mmio, rcv_undersize_pkts)+
1079                 amd8111e_read_mib(mmio, rcv_oversize_pkts);
1080
1081         /* stats.rx_over_errors*/
1082         new_stats->rx_over_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1083
1084         /* stats.rx_crc_errors*/
1085         new_stats->rx_crc_errors = amd8111e_read_mib(mmio, rcv_fcs_errors);
1086
1087         /* stats.rx_frame_errors*/
1088         new_stats->rx_frame_errors =
1089                 amd8111e_read_mib(mmio, rcv_alignment_errors);
1090
1091         /* stats.rx_fifo_errors */
1092         new_stats->rx_fifo_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1093
1094         /* stats.rx_missed_errors */
1095         new_stats->rx_missed_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1096
1097         /* stats.tx_aborted_errors*/
1098         new_stats->tx_aborted_errors =
1099                 amd8111e_read_mib(mmio, xmt_excessive_collision);
1100
1101         /* stats.tx_carrier_errors*/
1102         new_stats->tx_carrier_errors =
1103                 amd8111e_read_mib(mmio, xmt_loss_carrier);
1104
1105         /* stats.tx_fifo_errors*/
1106         new_stats->tx_fifo_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
1107
1108         /* stats.tx_window_errors*/
1109         new_stats->tx_window_errors =
1110                 amd8111e_read_mib(mmio, xmt_late_collision);
1111
1112         /* Reset the mibs for collecting new statistics */
1113         /* writew(MIB_CLEAR, mmio + MIB_ADDR);*/
1114
1115         spin_unlock_irqrestore (&lp->lock, flags);
1116
1117         return new_stats;
1118 }
1119 /* This function recalculate the interupt coalescing  mode on every interrupt
1120 according to the datarate and the packet rate.
1121 */
1122 static int amd8111e_calc_coalesce(struct net_device *dev)
1123 {
1124         struct amd8111e_priv *lp = netdev_priv(dev);
1125         struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
1126         int tx_pkt_rate;
1127         int rx_pkt_rate;
1128         int tx_data_rate;
1129         int rx_data_rate;
1130         int rx_pkt_size;
1131         int tx_pkt_size;
1132
1133         tx_pkt_rate = coal_conf->tx_packets - coal_conf->tx_prev_packets;
1134         coal_conf->tx_prev_packets =  coal_conf->tx_packets;
1135
1136         tx_data_rate = coal_conf->tx_bytes - coal_conf->tx_prev_bytes;
1137         coal_conf->tx_prev_bytes =  coal_conf->tx_bytes;
1138
1139         rx_pkt_rate = coal_conf->rx_packets - coal_conf->rx_prev_packets;
1140         coal_conf->rx_prev_packets =  coal_conf->rx_packets;
1141
1142         rx_data_rate = coal_conf->rx_bytes - coal_conf->rx_prev_bytes;
1143         coal_conf->rx_prev_bytes =  coal_conf->rx_bytes;
1144
1145         if(rx_pkt_rate < 800){
1146                 if(coal_conf->rx_coal_type != NO_COALESCE){
1147
1148                         coal_conf->rx_timeout = 0x0;
1149                         coal_conf->rx_event_count = 0;
1150                         amd8111e_set_coalesce(dev,RX_INTR_COAL);
1151                         coal_conf->rx_coal_type = NO_COALESCE;
1152                 }
1153         }
1154         else{
1155
1156                 rx_pkt_size = rx_data_rate/rx_pkt_rate;
1157                 if (rx_pkt_size < 128){
1158                         if(coal_conf->rx_coal_type != NO_COALESCE){
1159
1160                                 coal_conf->rx_timeout = 0;
1161                                 coal_conf->rx_event_count = 0;
1162                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1163                                 coal_conf->rx_coal_type = NO_COALESCE;
1164                         }
1165
1166                 }
1167                 else if ( (rx_pkt_size >= 128) && (rx_pkt_size < 512) ){
1168
1169                         if(coal_conf->rx_coal_type !=  LOW_COALESCE){
1170                                 coal_conf->rx_timeout = 1;
1171                                 coal_conf->rx_event_count = 4;
1172                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1173                                 coal_conf->rx_coal_type = LOW_COALESCE;
1174                         }
1175                 }
1176                 else if ((rx_pkt_size >= 512) && (rx_pkt_size < 1024)){
1177
1178                         if(coal_conf->rx_coal_type !=  MEDIUM_COALESCE){
1179                                 coal_conf->rx_timeout = 1;
1180                                 coal_conf->rx_event_count = 4;
1181                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1182                                 coal_conf->rx_coal_type = MEDIUM_COALESCE;
1183                         }
1184
1185                 }
1186                 else if(rx_pkt_size >= 1024){
1187                         if(coal_conf->rx_coal_type !=  HIGH_COALESCE){
1188                                 coal_conf->rx_timeout = 2;
1189                                 coal_conf->rx_event_count = 3;
1190                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1191                                 coal_conf->rx_coal_type = HIGH_COALESCE;
1192                         }
1193                 }
1194         }
1195         /* NOW FOR TX INTR COALESC */
1196         if(tx_pkt_rate < 800){
1197                 if(coal_conf->tx_coal_type != NO_COALESCE){
1198
1199                         coal_conf->tx_timeout = 0x0;
1200                         coal_conf->tx_event_count = 0;
1201                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1202                         coal_conf->tx_coal_type = NO_COALESCE;
1203                 }
1204         }
1205         else{
1206
1207                 tx_pkt_size = tx_data_rate/tx_pkt_rate;
1208                 if (tx_pkt_size < 128){
1209
1210                         if(coal_conf->tx_coal_type != NO_COALESCE){
1211
1212                                 coal_conf->tx_timeout = 0;
1213                                 coal_conf->tx_event_count = 0;
1214                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1215                                 coal_conf->tx_coal_type = NO_COALESCE;
1216                         }
1217
1218                 }
1219                 else if ( (tx_pkt_size >= 128) && (tx_pkt_size < 512) ){
1220
1221                         if(coal_conf->tx_coal_type !=  LOW_COALESCE){
1222                                 coal_conf->tx_timeout = 1;
1223                                 coal_conf->tx_event_count = 2;
1224                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1225                                 coal_conf->tx_coal_type = LOW_COALESCE;
1226
1227                         }
1228                 }
1229                 else if ((tx_pkt_size >= 512) && (tx_pkt_size < 1024)){
1230
1231                         if(coal_conf->tx_coal_type !=  MEDIUM_COALESCE){
1232                                 coal_conf->tx_timeout = 2;
1233                                 coal_conf->tx_event_count = 5;
1234                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1235                                 coal_conf->tx_coal_type = MEDIUM_COALESCE;
1236                         }
1237
1238                 }
1239                 else if(tx_pkt_size >= 1024){
1240                         if (tx_pkt_size >= 1024){
1241                                 if(coal_conf->tx_coal_type !=  HIGH_COALESCE){
1242                                         coal_conf->tx_timeout = 4;
1243                                         coal_conf->tx_event_count = 8;
1244                                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1245                                         coal_conf->tx_coal_type = HIGH_COALESCE;
1246                                 }
1247                         }
1248                 }
1249         }
1250         return 0;
1251
1252 }
1253 /*
1254 This is device interrupt function. It handles transmit, receive,link change and hardware timer interrupts.
1255 */
1256 static irqreturn_t amd8111e_interrupt(int irq, void *dev_id)
1257 {
1258
1259         struct net_device * dev = (struct net_device *) dev_id;
1260         struct amd8111e_priv *lp = netdev_priv(dev);
1261         void __iomem *mmio = lp->mmio;
1262         unsigned int intr0, intren0;
1263         unsigned int handled = 1;
1264
1265         if(unlikely(dev == NULL))
1266                 return IRQ_NONE;
1267
1268         spin_lock(&lp->lock);
1269
1270         /* disabling interrupt */
1271         writel(INTREN, mmio + CMD0);
1272
1273         /* Read interrupt status */
1274         intr0 = readl(mmio + INT0);
1275         intren0 = readl(mmio + INTEN0);
1276
1277         /* Process all the INT event until INTR bit is clear. */
1278
1279         if (!(intr0 & INTR)){
1280                 handled = 0;
1281                 goto err_no_interrupt;
1282         }
1283
1284         /* Current driver processes 4 interrupts : RINT,TINT,LCINT,STINT */
1285         writel(intr0, mmio + INT0);
1286
1287         /* Check if Receive Interrupt has occurred. */
1288 #ifdef CONFIG_AMD8111E_NAPI
1289         if(intr0 & RINT0){
1290                 if(netif_rx_schedule_prep(dev)){
1291                         /* Disable receive interupts */
1292                         writel(RINTEN0, mmio + INTEN0);
1293                         /* Schedule a polling routine */
1294                         __netif_rx_schedule(dev);
1295                 }
1296                 else if (intren0 & RINTEN0) {
1297                         printk("************Driver bug! \
1298                                 interrupt while in poll\n");
1299                         /* Fix by disable receive interrupts */
1300                         writel(RINTEN0, mmio + INTEN0);
1301                 }
1302         }
1303 #else
1304         if(intr0 & RINT0){
1305                 amd8111e_rx(dev);
1306                 writel(VAL2 | RDMD0, mmio + CMD0);
1307         }
1308 #endif /* CONFIG_AMD8111E_NAPI */
1309         /* Check if  Transmit Interrupt has occurred. */
1310         if(intr0 & TINT0)
1311                 amd8111e_tx(dev);
1312
1313         /* Check if  Link Change Interrupt has occurred. */
1314         if (intr0 & LCINT)
1315                 amd8111e_link_change(dev);
1316
1317         /* Check if Hardware Timer Interrupt has occurred. */
1318         if (intr0 & STINT)
1319                 amd8111e_calc_coalesce(dev);
1320
1321 err_no_interrupt:
1322         writel( VAL0 | INTREN,mmio + CMD0);
1323
1324         spin_unlock(&lp->lock);
1325
1326         return IRQ_RETVAL(handled);
1327 }
1328
1329 #ifdef CONFIG_NET_POLL_CONTROLLER
1330 static void amd8111e_poll(struct net_device *dev)
1331 {
1332         unsigned long flags;
1333         local_irq_save(flags);
1334         amd8111e_interrupt(0, dev);
1335         local_irq_restore(flags);
1336 }
1337 #endif
1338
1339
1340 /*
1341 This function closes the network interface and updates the statistics so that most recent statistics will be available after the interface is down.
1342 */
1343 static int amd8111e_close(struct net_device * dev)
1344 {
1345         struct amd8111e_priv *lp = netdev_priv(dev);
1346         netif_stop_queue(dev);
1347
1348         spin_lock_irq(&lp->lock);
1349
1350         amd8111e_disable_interrupt(lp);
1351         amd8111e_stop_chip(lp);
1352         amd8111e_free_ring(lp);
1353
1354         netif_carrier_off(lp->amd8111e_net_dev);
1355
1356         /* Delete ipg timer */
1357         if(lp->options & OPTION_DYN_IPG_ENABLE)
1358                 del_timer_sync(&lp->ipg_data.ipg_timer);
1359
1360         spin_unlock_irq(&lp->lock);
1361         free_irq(dev->irq, dev);
1362
1363         /* Update the statistics before closing */
1364         amd8111e_get_stats(dev);
1365         lp->opened = 0;
1366         return 0;
1367 }
1368 /* This function opens new interface.It requests irq for the device, initializes the device,buffers and descriptors, and starts the device.
1369 */
1370 static int amd8111e_open(struct net_device * dev )
1371 {
1372         struct amd8111e_priv *lp = netdev_priv(dev);
1373
1374         if(dev->irq ==0 || request_irq(dev->irq, amd8111e_interrupt, IRQF_SHARED,
1375                                          dev->name, dev))
1376                 return -EAGAIN;
1377
1378         spin_lock_irq(&lp->lock);
1379
1380         amd8111e_init_hw_default(lp);
1381
1382         if(amd8111e_restart(dev)){
1383                 spin_unlock_irq(&lp->lock);
1384                 if (dev->irq)
1385                         free_irq(dev->irq, dev);
1386                 return -ENOMEM;
1387         }
1388         /* Start ipg timer */
1389         if(lp->options & OPTION_DYN_IPG_ENABLE){
1390                 add_timer(&lp->ipg_data.ipg_timer);
1391                 printk(KERN_INFO "%s: Dynamic IPG Enabled.\n",dev->name);
1392         }
1393
1394         lp->opened = 1;
1395
1396         spin_unlock_irq(&lp->lock);
1397
1398         netif_start_queue(dev);
1399
1400         return 0;
1401 }
1402 /*
1403 This function checks if there is any transmit  descriptors available to queue more packet.
1404 */
1405 static int amd8111e_tx_queue_avail(struct amd8111e_priv* lp )
1406 {
1407         int tx_index = lp->tx_idx & TX_BUFF_MOD_MASK;
1408         if(lp->tx_skbuff[tx_index] != 0)
1409                 return -1;
1410         else
1411                 return 0;
1412
1413 }
1414 /*
1415 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.
1416 */
1417
1418 static int amd8111e_start_xmit(struct sk_buff *skb, struct net_device * dev)
1419 {
1420         struct amd8111e_priv *lp = netdev_priv(dev);
1421         int tx_index;
1422         unsigned long flags;
1423
1424         spin_lock_irqsave(&lp->lock, flags);
1425
1426         tx_index = lp->tx_idx & TX_RING_DR_MOD_MASK;
1427
1428         lp->tx_ring[tx_index].buff_count = cpu_to_le16(skb->len);
1429
1430         lp->tx_skbuff[tx_index] = skb;
1431         lp->tx_ring[tx_index].tx_flags = 0;
1432
1433 #if AMD8111E_VLAN_TAG_USED
1434         if((lp->vlgrp != NULL) && vlan_tx_tag_present(skb)){
1435                 lp->tx_ring[tx_index].tag_ctrl_cmd |=
1436                                 cpu_to_le16(TCC_VLAN_INSERT);
1437                 lp->tx_ring[tx_index].tag_ctrl_info =
1438                                 cpu_to_le16(vlan_tx_tag_get(skb));
1439
1440         }
1441 #endif
1442         lp->tx_dma_addr[tx_index] =
1443             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1444         lp->tx_ring[tx_index].buff_phy_addr =
1445             (u32) cpu_to_le32(lp->tx_dma_addr[tx_index]);
1446
1447         /*  Set FCS and LTINT bits */
1448         wmb();
1449         lp->tx_ring[tx_index].tx_flags |=
1450             cpu_to_le16(OWN_BIT | STP_BIT | ENP_BIT|ADD_FCS_BIT|LTINT_BIT);
1451
1452         lp->tx_idx++;
1453
1454         /* Trigger an immediate send poll. */
1455         writel( VAL1 | TDMD0, lp->mmio + CMD0);
1456         writel( VAL2 | RDMD0,lp->mmio + CMD0);
1457
1458         dev->trans_start = jiffies;
1459
1460         if(amd8111e_tx_queue_avail(lp) < 0){
1461                 netif_stop_queue(dev);
1462         }
1463         spin_unlock_irqrestore(&lp->lock, flags);
1464         return 0;
1465 }
1466 /*
1467 This function returns all the memory mapped registers of the device.
1468 */
1469 static void amd8111e_read_regs(struct amd8111e_priv *lp, u32 *buf)
1470 {
1471         void __iomem *mmio = lp->mmio;
1472         /* Read only necessary registers */
1473         buf[0] = readl(mmio + XMT_RING_BASE_ADDR0);
1474         buf[1] = readl(mmio + XMT_RING_LEN0);
1475         buf[2] = readl(mmio + RCV_RING_BASE_ADDR0);
1476         buf[3] = readl(mmio + RCV_RING_LEN0);
1477         buf[4] = readl(mmio + CMD0);
1478         buf[5] = readl(mmio + CMD2);
1479         buf[6] = readl(mmio + CMD3);
1480         buf[7] = readl(mmio + CMD7);
1481         buf[8] = readl(mmio + INT0);
1482         buf[9] = readl(mmio + INTEN0);
1483         buf[10] = readl(mmio + LADRF);
1484         buf[11] = readl(mmio + LADRF+4);
1485         buf[12] = readl(mmio + STAT0);
1486 }
1487
1488
1489 /*
1490 This function sets promiscuos mode, all-multi mode or the multicast address
1491 list to the device.
1492 */
1493 static void amd8111e_set_multicast_list(struct net_device *dev)
1494 {
1495         struct dev_mc_list* mc_ptr;
1496         struct amd8111e_priv *lp = netdev_priv(dev);
1497         u32 mc_filter[2] ;
1498         int i,bit_num;
1499         if(dev->flags & IFF_PROMISC){
1500                 writel( VAL2 | PROM, lp->mmio + CMD2);
1501                 return;
1502         }
1503         else
1504                 writel( PROM, lp->mmio + CMD2);
1505         if(dev->flags & IFF_ALLMULTI || dev->mc_count > MAX_FILTER_SIZE){
1506                 /* get all multicast packet */
1507                 mc_filter[1] = mc_filter[0] = 0xffffffff;
1508                 lp->mc_list = dev->mc_list;
1509                 lp->options |= OPTION_MULTICAST_ENABLE;
1510                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1511                 return;
1512         }
1513         if( dev->mc_count == 0 ){
1514                 /* get only own packets */
1515                 mc_filter[1] = mc_filter[0] = 0;
1516                 lp->mc_list = NULL;
1517                 lp->options &= ~OPTION_MULTICAST_ENABLE;
1518                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1519                 /* disable promiscous mode */
1520                 writel(PROM, lp->mmio + CMD2);
1521                 return;
1522         }
1523         /* load all the multicast addresses in the logic filter */
1524         lp->options |= OPTION_MULTICAST_ENABLE;
1525         lp->mc_list = dev->mc_list;
1526         mc_filter[1] = mc_filter[0] = 0;
1527         for (i = 0, mc_ptr = dev->mc_list; mc_ptr && i < dev->mc_count;
1528                      i++, mc_ptr = mc_ptr->next) {
1529                 bit_num = (ether_crc_le(ETH_ALEN, mc_ptr->dmi_addr) >> 26) & 0x3f;
1530                 mc_filter[bit_num >> 5] |= 1 << (bit_num & 31);
1531         }
1532         amd8111e_writeq(*(u64*)mc_filter,lp->mmio+ LADRF);
1533
1534         /* To eliminate PCI posting bug */
1535         readl(lp->mmio + CMD2);
1536
1537 }
1538
1539 static void amd8111e_get_drvinfo(struct net_device* dev, struct ethtool_drvinfo *info)
1540 {
1541         struct amd8111e_priv *lp = netdev_priv(dev);
1542         struct pci_dev *pci_dev = lp->pci_dev;
1543         strcpy (info->driver, MODULE_NAME);
1544         strcpy (info->version, MODULE_VERS);
1545         sprintf(info->fw_version,"%u",chip_version);
1546         strcpy (info->bus_info, pci_name(pci_dev));
1547 }
1548
1549 static int amd8111e_get_regs_len(struct net_device *dev)
1550 {
1551         return AMD8111E_REG_DUMP_LEN;
1552 }
1553
1554 static void amd8111e_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
1555 {
1556         struct amd8111e_priv *lp = netdev_priv(dev);
1557         regs->version = 0;
1558         amd8111e_read_regs(lp, buf);
1559 }
1560
1561 static int amd8111e_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1562 {
1563         struct amd8111e_priv *lp = netdev_priv(dev);
1564         spin_lock_irq(&lp->lock);
1565         mii_ethtool_gset(&lp->mii_if, ecmd);
1566         spin_unlock_irq(&lp->lock);
1567         return 0;
1568 }
1569
1570 static int amd8111e_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1571 {
1572         struct amd8111e_priv *lp = netdev_priv(dev);
1573         int res;
1574         spin_lock_irq(&lp->lock);
1575         res = mii_ethtool_sset(&lp->mii_if, ecmd);
1576         spin_unlock_irq(&lp->lock);
1577         return res;
1578 }
1579
1580 static int amd8111e_nway_reset(struct net_device *dev)
1581 {
1582         struct amd8111e_priv *lp = netdev_priv(dev);
1583         return mii_nway_restart(&lp->mii_if);
1584 }
1585
1586 static u32 amd8111e_get_link(struct net_device *dev)
1587 {
1588         struct amd8111e_priv *lp = netdev_priv(dev);
1589         return mii_link_ok(&lp->mii_if);
1590 }
1591
1592 static void amd8111e_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1593 {
1594         struct amd8111e_priv *lp = netdev_priv(dev);
1595         wol_info->supported = WAKE_MAGIC|WAKE_PHY;
1596         if (lp->options & OPTION_WOL_ENABLE)
1597                 wol_info->wolopts = WAKE_MAGIC;
1598 }
1599
1600 static int amd8111e_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1601 {
1602         struct amd8111e_priv *lp = netdev_priv(dev);
1603         if (wol_info->wolopts & ~(WAKE_MAGIC|WAKE_PHY))
1604                 return -EINVAL;
1605         spin_lock_irq(&lp->lock);
1606         if (wol_info->wolopts & WAKE_MAGIC)
1607                 lp->options |=
1608                         (OPTION_WOL_ENABLE | OPTION_WAKE_MAGIC_ENABLE);
1609         else if(wol_info->wolopts & WAKE_PHY)
1610                 lp->options |=
1611                         (OPTION_WOL_ENABLE | OPTION_WAKE_PHY_ENABLE);
1612         else
1613                 lp->options &= ~OPTION_WOL_ENABLE;
1614         spin_unlock_irq(&lp->lock);
1615         return 0;
1616 }
1617
1618 static const struct ethtool_ops ops = {
1619         .get_drvinfo = amd8111e_get_drvinfo,
1620         .get_regs_len = amd8111e_get_regs_len,
1621         .get_regs = amd8111e_get_regs,
1622         .get_settings = amd8111e_get_settings,
1623         .set_settings = amd8111e_set_settings,
1624         .nway_reset = amd8111e_nway_reset,
1625         .get_link = amd8111e_get_link,
1626         .get_wol = amd8111e_get_wol,
1627         .set_wol = amd8111e_set_wol,
1628 };
1629
1630 /*
1631 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.
1632 */
1633
1634 static int amd8111e_ioctl(struct net_device * dev , struct ifreq *ifr, int cmd)
1635 {
1636         struct mii_ioctl_data *data = if_mii(ifr);
1637         struct amd8111e_priv *lp = netdev_priv(dev);
1638         int err;
1639         u32 mii_regval;
1640
1641         if (!capable(CAP_NET_ADMIN))
1642                 return -EPERM;
1643
1644         switch(cmd) {
1645         case SIOCGMIIPHY:
1646                 data->phy_id = lp->ext_phy_addr;
1647
1648         /* fallthru */
1649         case SIOCGMIIREG:
1650
1651                 spin_lock_irq(&lp->lock);
1652                 err = amd8111e_read_phy(lp, data->phy_id,
1653                         data->reg_num & PHY_REG_ADDR_MASK, &mii_regval);
1654                 spin_unlock_irq(&lp->lock);
1655
1656                 data->val_out = mii_regval;
1657                 return err;
1658
1659         case SIOCSMIIREG:
1660
1661                 spin_lock_irq(&lp->lock);
1662                 err = amd8111e_write_phy(lp, data->phy_id,
1663                         data->reg_num & PHY_REG_ADDR_MASK, data->val_in);
1664                 spin_unlock_irq(&lp->lock);
1665
1666                 return err;
1667
1668         default:
1669                 /* do nothing */
1670                 break;
1671         }
1672         return -EOPNOTSUPP;
1673 }
1674 static int amd8111e_set_mac_address(struct net_device *dev, void *p)
1675 {
1676         struct amd8111e_priv *lp = netdev_priv(dev);
1677         int i;
1678         struct sockaddr *addr = p;
1679
1680         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1681         spin_lock_irq(&lp->lock);
1682         /* Setting the MAC address to the device */
1683         for(i = 0; i < ETH_ADDR_LEN; i++)
1684                 writeb( dev->dev_addr[i], lp->mmio + PADR + i );
1685
1686         spin_unlock_irq(&lp->lock);
1687
1688         return 0;
1689 }
1690
1691 /*
1692 This function changes the mtu of the device. It restarts the device  to initialize the descriptor with new receive buffers.
1693 */
1694 static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
1695 {
1696         struct amd8111e_priv *lp = netdev_priv(dev);
1697         int err;
1698
1699         if ((new_mtu < AMD8111E_MIN_MTU) || (new_mtu > AMD8111E_MAX_MTU))
1700                 return -EINVAL;
1701
1702         if (!netif_running(dev)) {
1703                 /* new_mtu will be used
1704                    when device starts netxt time */
1705                 dev->mtu = new_mtu;
1706                 return 0;
1707         }
1708
1709         spin_lock_irq(&lp->lock);
1710
1711         /* stop the chip */
1712         writel(RUN, lp->mmio + CMD0);
1713
1714         dev->mtu = new_mtu;
1715
1716         err = amd8111e_restart(dev);
1717         spin_unlock_irq(&lp->lock);
1718         if(!err)
1719                 netif_start_queue(dev);
1720         return err;
1721 }
1722
1723 #if AMD8111E_VLAN_TAG_USED
1724 static void amd8111e_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
1725 {
1726         struct  amd8111e_priv *lp = netdev_priv(dev);
1727         spin_lock_irq(&lp->lock);
1728         lp->vlgrp = grp;
1729         spin_unlock_irq(&lp->lock);
1730 }
1731 #endif
1732
1733 static int amd8111e_enable_magicpkt(struct amd8111e_priv* lp)
1734 {
1735         writel( VAL1|MPPLBA, lp->mmio + CMD3);
1736         writel( VAL0|MPEN_SW, lp->mmio + CMD7);
1737
1738         /* To eliminate PCI posting bug */
1739         readl(lp->mmio + CMD7);
1740         return 0;
1741 }
1742
1743 static int amd8111e_enable_link_change(struct amd8111e_priv* lp)
1744 {
1745
1746         /* Adapter is already stoped/suspended/interrupt-disabled */
1747         writel(VAL0|LCMODE_SW,lp->mmio + CMD7);
1748
1749         /* To eliminate PCI posting bug */
1750         readl(lp->mmio + CMD7);
1751         return 0;
1752 }
1753 /* 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 */
1754
1755 static void amd8111e_tx_timeout(struct net_device *dev)
1756 {
1757         struct amd8111e_priv* lp = netdev_priv(dev);
1758         int err;
1759
1760         printk(KERN_ERR "%s: transmit timed out, resetting\n",
1761                                                       dev->name);
1762         spin_lock_irq(&lp->lock);
1763         err = amd8111e_restart(dev);
1764         spin_unlock_irq(&lp->lock);
1765         if(!err)
1766                 netif_wake_queue(dev);
1767 }
1768 static int amd8111e_suspend(struct pci_dev *pci_dev, pm_message_t state)
1769 {
1770         struct net_device *dev = pci_get_drvdata(pci_dev);
1771         struct amd8111e_priv *lp = netdev_priv(dev);
1772
1773         if (!netif_running(dev))
1774                 return 0;
1775
1776         /* disable the interrupt */
1777         spin_lock_irq(&lp->lock);
1778         amd8111e_disable_interrupt(lp);
1779         spin_unlock_irq(&lp->lock);
1780
1781         netif_device_detach(dev);
1782
1783         /* stop chip */
1784         spin_lock_irq(&lp->lock);
1785         if(lp->options & OPTION_DYN_IPG_ENABLE)
1786                 del_timer_sync(&lp->ipg_data.ipg_timer);
1787         amd8111e_stop_chip(lp);
1788         spin_unlock_irq(&lp->lock);
1789
1790         if(lp->options & OPTION_WOL_ENABLE){
1791                  /* enable wol */
1792                 if(lp->options & OPTION_WAKE_MAGIC_ENABLE)
1793                         amd8111e_enable_magicpkt(lp);
1794                 if(lp->options & OPTION_WAKE_PHY_ENABLE)
1795                         amd8111e_enable_link_change(lp);
1796
1797                 pci_enable_wake(pci_dev, PCI_D3hot, 1);
1798                 pci_enable_wake(pci_dev, PCI_D3cold, 1);
1799
1800         }
1801         else{
1802                 pci_enable_wake(pci_dev, PCI_D3hot, 0);
1803                 pci_enable_wake(pci_dev, PCI_D3cold, 0);
1804         }
1805
1806         pci_save_state(pci_dev);
1807         pci_set_power_state(pci_dev, PCI_D3hot);
1808
1809         return 0;
1810 }
1811 static int amd8111e_resume(struct pci_dev *pci_dev)
1812 {
1813         struct net_device *dev = pci_get_drvdata(pci_dev);
1814         struct amd8111e_priv *lp = netdev_priv(dev);
1815
1816         if (!netif_running(dev))
1817                 return 0;
1818
1819         pci_set_power_state(pci_dev, PCI_D0);
1820         pci_restore_state(pci_dev);
1821
1822         pci_enable_wake(pci_dev, PCI_D3hot, 0);
1823         pci_enable_wake(pci_dev, PCI_D3cold, 0); /* D3 cold */
1824
1825         netif_device_attach(dev);
1826
1827         spin_lock_irq(&lp->lock);
1828         amd8111e_restart(dev);
1829         /* Restart ipg timer */
1830         if(lp->options & OPTION_DYN_IPG_ENABLE)
1831                 mod_timer(&lp->ipg_data.ipg_timer,
1832                                 jiffies + IPG_CONVERGE_JIFFIES);
1833         spin_unlock_irq(&lp->lock);
1834
1835         return 0;
1836 }
1837
1838
1839 static void __devexit amd8111e_remove_one(struct pci_dev *pdev)
1840 {
1841         struct net_device *dev = pci_get_drvdata(pdev);
1842         if (dev) {
1843                 unregister_netdev(dev);
1844                 iounmap(((struct amd8111e_priv *)netdev_priv(dev))->mmio);
1845                 free_netdev(dev);
1846                 pci_release_regions(pdev);
1847                 pci_disable_device(pdev);
1848                 pci_set_drvdata(pdev, NULL);
1849         }
1850 }
1851 static void amd8111e_config_ipg(struct net_device* dev)
1852 {
1853         struct amd8111e_priv *lp = netdev_priv(dev);
1854         struct ipg_info* ipg_data = &lp->ipg_data;
1855         void __iomem *mmio = lp->mmio;
1856         unsigned int prev_col_cnt = ipg_data->col_cnt;
1857         unsigned int total_col_cnt;
1858         unsigned int tmp_ipg;
1859
1860         if(lp->link_config.duplex == DUPLEX_FULL){
1861                 ipg_data->ipg = DEFAULT_IPG;
1862                 return;
1863         }
1864
1865         if(ipg_data->ipg_state == SSTATE){
1866
1867                 if(ipg_data->timer_tick == IPG_STABLE_TIME){
1868
1869                         ipg_data->timer_tick = 0;
1870                         ipg_data->ipg = MIN_IPG - IPG_STEP;
1871                         ipg_data->current_ipg = MIN_IPG;
1872                         ipg_data->diff_col_cnt = 0xFFFFFFFF;
1873                         ipg_data->ipg_state = CSTATE;
1874                 }
1875                 else
1876                         ipg_data->timer_tick++;
1877         }
1878
1879         if(ipg_data->ipg_state == CSTATE){
1880
1881                 /* Get the current collision count */
1882
1883                 total_col_cnt = ipg_data->col_cnt =
1884                                 amd8111e_read_mib(mmio, xmt_collisions);
1885
1886                 if ((total_col_cnt - prev_col_cnt) <
1887                                 (ipg_data->diff_col_cnt)){
1888
1889                         ipg_data->diff_col_cnt =
1890                                 total_col_cnt - prev_col_cnt ;
1891
1892                         ipg_data->ipg = ipg_data->current_ipg;
1893                 }
1894
1895                 ipg_data->current_ipg += IPG_STEP;
1896
1897                 if (ipg_data->current_ipg <= MAX_IPG)
1898                         tmp_ipg = ipg_data->current_ipg;
1899                 else{
1900                         tmp_ipg = ipg_data->ipg;
1901                         ipg_data->ipg_state = SSTATE;
1902                 }
1903                 writew((u32)tmp_ipg, mmio + IPG);
1904                 writew((u32)(tmp_ipg - IFS1_DELTA), mmio + IFS1);
1905         }
1906          mod_timer(&lp->ipg_data.ipg_timer, jiffies + IPG_CONVERGE_JIFFIES);
1907         return;
1908
1909 }
1910
1911 static void __devinit amd8111e_probe_ext_phy(struct net_device* dev)
1912 {
1913         struct amd8111e_priv *lp = netdev_priv(dev);
1914         int i;
1915
1916         for (i = 0x1e; i >= 0; i--) {
1917                 u32 id1, id2;
1918
1919                 if (amd8111e_read_phy(lp, i, MII_PHYSID1, &id1))
1920                         continue;
1921                 if (amd8111e_read_phy(lp, i, MII_PHYSID2, &id2))
1922                         continue;
1923                 lp->ext_phy_id = (id1 << 16) | id2;
1924                 lp->ext_phy_addr = i;
1925                 return;
1926         }
1927         lp->ext_phy_id = 0;
1928         lp->ext_phy_addr = 1;
1929 }
1930
1931 static int __devinit amd8111e_probe_one(struct pci_dev *pdev,
1932                                   const struct pci_device_id *ent)
1933 {
1934         int err,i,pm_cap;
1935         unsigned long reg_addr,reg_len;
1936         struct amd8111e_priv* lp;
1937         struct net_device* dev;
1938
1939         err = pci_enable_device(pdev);
1940         if(err){
1941                 printk(KERN_ERR "amd8111e: Cannot enable new PCI device,"
1942                         "exiting.\n");
1943                 return err;
1944         }
1945
1946         if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)){
1947                 printk(KERN_ERR "amd8111e: Cannot find PCI base address"
1948                        "exiting.\n");
1949                 err = -ENODEV;
1950                 goto err_disable_pdev;
1951         }
1952
1953         err = pci_request_regions(pdev, MODULE_NAME);
1954         if(err){
1955                 printk(KERN_ERR "amd8111e: Cannot obtain PCI resources, "
1956                        "exiting.\n");
1957                 goto err_disable_pdev;
1958         }
1959
1960         pci_set_master(pdev);
1961
1962         /* Find power-management capability. */
1963         if((pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM))==0){
1964                 printk(KERN_ERR "amd8111e: No Power Management capability, "
1965                        "exiting.\n");
1966                 goto err_free_reg;
1967         }
1968
1969         /* Initialize DMA */
1970         if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) < 0) {
1971                 printk(KERN_ERR "amd8111e: DMA not supported,"
1972                         "exiting.\n");
1973                 goto err_free_reg;
1974         }
1975
1976         reg_addr = pci_resource_start(pdev, 0);
1977         reg_len = pci_resource_len(pdev, 0);
1978
1979         dev = alloc_etherdev(sizeof(struct amd8111e_priv));
1980         if (!dev) {
1981                 printk(KERN_ERR "amd8111e: Etherdev alloc failed, exiting.\n");
1982                 err = -ENOMEM;
1983                 goto err_free_reg;
1984         }
1985
1986         SET_MODULE_OWNER(dev);
1987         SET_NETDEV_DEV(dev, &pdev->dev);
1988
1989 #if AMD8111E_VLAN_TAG_USED
1990         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX ;
1991         dev->vlan_rx_register =amd8111e_vlan_rx_register;
1992 #endif
1993
1994         lp = netdev_priv(dev);
1995         lp->pci_dev = pdev;
1996         lp->amd8111e_net_dev = dev;
1997         lp->pm_cap = pm_cap;
1998
1999         spin_lock_init(&lp->lock);
2000
2001         lp->mmio = ioremap(reg_addr, reg_len);
2002         if (lp->mmio == 0) {
2003                 printk(KERN_ERR "amd8111e: Cannot map device registers, "
2004                        "exiting\n");
2005                 err = -ENOMEM;
2006                 goto err_free_dev;
2007         }
2008
2009         /* Initializing MAC address */
2010         for(i = 0; i < ETH_ADDR_LEN; i++)
2011                         dev->dev_addr[i] =readb(lp->mmio + PADR + i);
2012
2013         /* Setting user defined parametrs */
2014         lp->ext_phy_option = speed_duplex[card_idx];
2015         if(coalesce[card_idx])
2016                 lp->options |= OPTION_INTR_COAL_ENABLE;
2017         if(dynamic_ipg[card_idx++])
2018                 lp->options |= OPTION_DYN_IPG_ENABLE;
2019
2020         /* Initialize driver entry points */
2021         dev->open = amd8111e_open;
2022         dev->hard_start_xmit = amd8111e_start_xmit;
2023         dev->stop = amd8111e_close;
2024         dev->get_stats = amd8111e_get_stats;
2025         dev->set_multicast_list = amd8111e_set_multicast_list;
2026         dev->set_mac_address = amd8111e_set_mac_address;
2027         dev->do_ioctl = amd8111e_ioctl;
2028         dev->change_mtu = amd8111e_change_mtu;
2029         SET_ETHTOOL_OPS(dev, &ops);
2030         dev->irq =pdev->irq;
2031         dev->tx_timeout = amd8111e_tx_timeout;
2032         dev->watchdog_timeo = AMD8111E_TX_TIMEOUT;
2033 #ifdef CONFIG_AMD8111E_NAPI
2034         dev->poll = amd8111e_rx_poll;
2035         dev->weight = 32;
2036 #endif
2037 #ifdef CONFIG_NET_POLL_CONTROLLER
2038         dev->poll_controller = amd8111e_poll;
2039 #endif
2040
2041 #if AMD8111E_VLAN_TAG_USED
2042         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2043         dev->vlan_rx_register =amd8111e_vlan_rx_register;
2044 #endif
2045         /* Probe the external PHY */
2046         amd8111e_probe_ext_phy(dev);
2047
2048         /* setting mii default values */
2049         lp->mii_if.dev = dev;
2050         lp->mii_if.mdio_read = amd8111e_mdio_read;
2051         lp->mii_if.mdio_write = amd8111e_mdio_write;
2052         lp->mii_if.phy_id = lp->ext_phy_addr;
2053
2054         /* Set receive buffer length and set jumbo option*/
2055         amd8111e_set_rx_buff_len(dev);
2056
2057
2058         err = register_netdev(dev);
2059         if (err) {
2060                 printk(KERN_ERR "amd8111e: Cannot register net device, "
2061                        "exiting.\n");
2062                 goto err_iounmap;
2063         }
2064
2065         pci_set_drvdata(pdev, dev);
2066
2067         /* Initialize software ipg timer */
2068         if(lp->options & OPTION_DYN_IPG_ENABLE){
2069                 init_timer(&lp->ipg_data.ipg_timer);
2070                 lp->ipg_data.ipg_timer.data = (unsigned long) dev;
2071                 lp->ipg_data.ipg_timer.function = (void *)&amd8111e_config_ipg;
2072                 lp->ipg_data.ipg_timer.expires = jiffies +
2073                                                  IPG_CONVERGE_JIFFIES;
2074                 lp->ipg_data.ipg = DEFAULT_IPG;
2075                 lp->ipg_data.ipg_state = CSTATE;
2076         };
2077
2078         /*  display driver and device information */
2079
2080         chip_version = (readl(lp->mmio + CHIPID) & 0xf0000000)>>28;
2081         printk(KERN_INFO "%s: AMD-8111e Driver Version: %s\n",                                                           dev->name,MODULE_VERS);
2082         printk(KERN_INFO "%s: [ Rev %x ] PCI 10/100BaseT Ethernet ",                                                    dev->name, chip_version);
2083         for (i = 0; i < 6; i++)
2084                 printk("%2.2x%c",dev->dev_addr[i],i == 5 ? ' ' : ':');
2085         printk( "\n");
2086         if (lp->ext_phy_id)
2087                 printk(KERN_INFO "%s: Found MII PHY ID 0x%08x at address 0x%02x\n",
2088                        dev->name, lp->ext_phy_id, lp->ext_phy_addr);
2089         else
2090                 printk(KERN_INFO "%s: Couldn't detect MII PHY, assuming address 0x01\n",
2091                        dev->name);
2092         return 0;
2093 err_iounmap:
2094         iounmap(lp->mmio);
2095
2096 err_free_dev:
2097         free_netdev(dev);
2098
2099 err_free_reg:
2100         pci_release_regions(pdev);
2101
2102 err_disable_pdev:
2103         pci_disable_device(pdev);
2104         pci_set_drvdata(pdev, NULL);
2105         return err;
2106
2107 }
2108
2109 static struct pci_driver amd8111e_driver = {
2110         .name           = MODULE_NAME,
2111         .id_table       = amd8111e_pci_tbl,
2112         .probe          = amd8111e_probe_one,
2113         .remove         = __devexit_p(amd8111e_remove_one),
2114         .suspend        = amd8111e_suspend,
2115         .resume         = amd8111e_resume
2116 };
2117
2118 static int __init amd8111e_init(void)
2119 {
2120         return pci_register_driver(&amd8111e_driver);
2121 }
2122
2123 static void __exit amd8111e_cleanup(void)
2124 {
2125         pci_unregister_driver(&amd8111e_driver);
2126 }
2127
2128 module_init(amd8111e_init);
2129 module_exit(amd8111e_cleanup);