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   1
   2 /* Advanced  Micro Devices Inc. AMD8111E Linux Network Driver
   3  * Copyright (C) 2004 Advanced Micro Devices
   4  *
   5  *
   6  * Copyright 2001,2002 Jeff Garzik <jgarzik@mandrakesoft.com> [ 8139cp.c,tg3.c ]
   7  * Copyright (C) 2001, 2002 David S. Miller (davem@redhat.com)[ tg3.c]
   8  * Copyright 1996-1999 Thomas Bogendoerfer [ pcnet32.c ]
   9  * Derived from the lance driver written 1993,1994,1995 by Donald Becker.
  10  * Copyright 1993 United States Government as represented by the
  11  *      Director, National Security Agency.[ pcnet32.c ]
  12  * Carsten Langgaard, carstenl@mips.com [ pcnet32.c ]
  13  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
  14  *
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  29  * USA
  30
  31 Module Name:
  32
  33         amd8111e.c
  34
  35 Abstract:
  36
  37          AMD8111 based 10/100 Ethernet Controller Driver.
  38
  39 Environment:
  40
  41         Kernel Mode
  42
  43 Revision History:
  44         3.0.0
  45            Initial Revision.
  46         3.0.1
  47          1. Dynamic interrupt coalescing.
  48          2. Removed prev_stats.
  49          3. MII support.
  50          4. Dynamic IPG support
  51         3.0.2  05/29/2003
  52          1. Bug fix: Fixed failure to send jumbo packets larger than 4k.
  53          2. Bug fix: Fixed VLAN support failure.
  54          3. Bug fix: Fixed receive interrupt coalescing bug.
  55          4. Dynamic IPG support is disabled by default.
  56         3.0.3 06/05/2003
  57          1. Bug fix: Fixed failure to close the interface if SMP is enabled.
  58         3.0.4 12/09/2003
  59          1. Added set_mac_address routine for bonding driver support.
  60          2. Tested the driver for bonding support
  61          3. Bug fix: Fixed mismach in actual receive buffer lenth and lenth
  62             indicated to the h/w.
  63          4. Modified amd8111e_rx() routine to receive all the received packets
  64             in the first interrupt.
  65          5. Bug fix: Corrected  rx_errors  reported in get_stats() function.
  66         3.0.5 03/22/2004
  67          1. Added NAPI support
  68
  69 */
  70
  71
  72 #include <linux/module.h>
  73 #include <linux/kernel.h>
  74 #include <linux/types.h>
  75 #include <linux/compiler.h>
  76 #include <linux/slab.h>
  77 #include <linux/delay.h>
  78 #include <linux/init.h>
  79 #include <linux/ioport.h>
  80 #include <linux/pci.h>
  81 #include <linux/netdevice.h>
  82 #include <linux/etherdevice.h>
  83 #include <linux/skbuff.h>
  84 #include <linux/ethtool.h>
  85 #include <linux/mii.h>
  86 #include <linux/if_vlan.h>
  87 #include <linux/ctype.h>
  88 #include <linux/crc32.h>
  89 #include <linux/dma-mapping.h>
  90
  91 #include <asm/system.h>
  92 #include <asm/io.h>
  93 #include <asm/byteorder.h>
  94 #include <asm/uaccess.h>
  95
  96 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
  97 #define AMD8111E_VLAN_TAG_USED 1
  98 #else
  99 #define AMD8111E_VLAN_TAG_USED 0
 100 #endif
 101
 102 #include "amd8111e.h"
 103 #define MODULE_NAME     "amd8111e"
 104 #define MODULE_VERS     "3.0.6"
 105 MODULE_AUTHOR("Advanced Micro Devices, Inc.");
 106 MODULE_DESCRIPTION ("AMD8111 based 10/100 Ethernet Controller. Driver Version 3.0.6");
 107 MODULE_LICENSE("GPL");
 108 MODULE_DEVICE_TABLE(pci, amd8111e_pci_tbl);
 109 module_param_array(speed_duplex, int, NULL, 0);
 110 MODULE_PARM_DESC(speed_duplex, "Set device speed and duplex modes, 0: Auto Negotitate, 1: 10Mbps Half Duplex, 2: 10Mbps Full Duplex, 3: 100Mbps Half Duplex, 4: 100Mbps Full Duplex");
 111 module_param_array(coalesce, bool, NULL, 0);
 112 MODULE_PARM_DESC(coalesce, "Enable or Disable interrupt coalescing, 1: Enable, 0: Disable");
 113 module_param_array(dynamic_ipg, bool, NULL, 0);
 114 MODULE_PARM_DESC(dynamic_ipg, "Enable or Disable dynamic IPG, 1: Enable, 0: Disable");
 115
 116 static struct pci_device_id amd8111e_pci_tbl[] = {
 117
 118         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD8111E_7462,
 119          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
 120         { 0, }
 121
 122 };
 123 /*
 124 This function will read the PHY registers.
 125 */
 126 static int amd8111e_read_phy(struct amd8111e_priv* lp, int phy_id, int reg, u32* val)
 127 {
 128         void __iomem *mmio = lp->mmio;
 129         unsigned int reg_val;
 130         unsigned int repeat= REPEAT_CNT;
 131
 132         reg_val = readl(mmio + PHY_ACCESS);
 133         while (reg_val & PHY_CMD_ACTIVE)
 134                 reg_val = readl( mmio + PHY_ACCESS );
 135
 136         writel( PHY_RD_CMD | ((phy_id & 0x1f) << 21) |
 137                            ((reg & 0x1f) << 16),  mmio +PHY_ACCESS);
 138         do{
 139                 reg_val = readl(mmio + PHY_ACCESS);
 140                 udelay(30);  /* It takes 30 us to read/write data */
 141         } while (--repeat && (reg_val & PHY_CMD_ACTIVE));
 142         if(reg_val & PHY_RD_ERR)
 143                 goto err_phy_read;
 144
 145         *val = reg_val & 0xffff;
 146         return 0;
 147 err_phy_read:
 148         *val = 0;
 149         return -EINVAL;
 150
 151 }
 152
 153 /*
 154 This function will write into PHY registers.
 155 */
 156 static int amd8111e_write_phy(struct amd8111e_priv* lp,int phy_id, int reg, u32 val)
 157 {
 158         unsigned int repeat = REPEAT_CNT;
 159         void __iomem *mmio = lp->mmio;
 160         unsigned int reg_val;
 161
 162         reg_val = readl(mmio + PHY_ACCESS);
 163         while (reg_val & PHY_CMD_ACTIVE)
 164                 reg_val = readl( mmio + PHY_ACCESS );
 165
 166         writel( PHY_WR_CMD | ((phy_id & 0x1f) << 21) |
 167                            ((reg & 0x1f) << 16)|val, mmio + PHY_ACCESS);
 168
 169         do{
 170                 reg_val = readl(mmio + PHY_ACCESS);
 171                 udelay(30);  /* It takes 30 us to read/write the data */
 172         } while (--repeat && (reg_val & PHY_CMD_ACTIVE));
 173
 174         if(reg_val & PHY_RD_ERR)
 175                 goto err_phy_write;
 176
 177         return 0;
 178
 179 err_phy_write:
 180         return -EINVAL;
 181
 182 }
 183 /*
 184 This is the mii register read function provided to the mii interface.
 185 */
 186 static int amd8111e_mdio_read(struct net_device * dev, int phy_id, int reg_num)
 187 {
 188         struct amd8111e_priv* lp = netdev_priv(dev);
 189         unsigned int reg_val;
 190
 191         amd8111e_read_phy(lp,phy_id,reg_num,&reg_val);
 192         return reg_val;
 193
 194 }
 195
 196 /*
 197 This is the mii register write function provided to the mii interface.
 198 */
 199 static void amd8111e_mdio_write(struct net_device * dev, int phy_id, int reg_num, int val)
 200 {
 201         struct amd8111e_priv* lp = netdev_priv(dev);
 202
 203         amd8111e_write_phy(lp, phy_id, reg_num, val);
 204 }
 205
 206 /*
 207 This function will set PHY speed. During initialization sets the original speed to 100 full.
 208 */
 209 static void amd8111e_set_ext_phy(struct net_device *dev)
 210 {
 211         struct amd8111e_priv *lp = netdev_priv(dev);
 212         u32 bmcr,advert,tmp;
 213
 214         /* Determine mii register values to set the speed */
 215         advert = amd8111e_mdio_read(dev, lp->ext_phy_addr, MII_ADVERTISE);
 216         tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
 217         switch (lp->ext_phy_option){
 218
 219                 default:
 220                 case SPEED_AUTONEG: /* advertise all values */
 221                         tmp |= ( ADVERTISE_10HALF|ADVERTISE_10FULL|
 222                                 ADVERTISE_100HALF|ADVERTISE_100FULL) ;
 223                         break;
 224                 case SPEED10_HALF:
 225                         tmp |= ADVERTISE_10HALF;
 226                         break;
 227                 case SPEED10_FULL:
 228                         tmp |= ADVERTISE_10FULL;
 229                         break;
 230                 case SPEED100_HALF:
 231                         tmp |= ADVERTISE_100HALF;
 232                         break;
 233                 case SPEED100_FULL:
 234                         tmp |= ADVERTISE_100FULL;
 235                         break;
 236         }
 237
 238         if(advert != tmp)
 239                 amd8111e_mdio_write(dev, lp->ext_phy_addr, MII_ADVERTISE, tmp);
 240         /* Restart auto negotiation */
 241         bmcr = amd8111e_mdio_read(dev, lp->ext_phy_addr, MII_BMCR);
 242         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
 243         amd8111e_mdio_write(dev, lp->ext_phy_addr, MII_BMCR, bmcr);
 244
 245 }
 246
 247 /*
 248 This function will unmap skb->data space and will free
 249 all transmit and receive skbuffs.
 250 */
 251 static int amd8111e_free_skbs(struct net_device *dev)
 252 {
 253         struct amd8111e_priv *lp = netdev_priv(dev);
 254         struct sk_buff* rx_skbuff;
 255         int i;
 256
 257         /* Freeing transmit skbs */
 258         for(i = 0; i < NUM_TX_BUFFERS; i++){
 259                 if(lp->tx_skbuff[i]){
 260                         pci_unmap_single(lp->pci_dev,lp->tx_dma_addr[i],                                        lp->tx_skbuff[i]->len,PCI_DMA_TODEVICE);
 261                         dev_kfree_skb (lp->tx_skbuff[i]);
 262                         lp->tx_skbuff[i] = NULL;
 263                         lp->tx_dma_addr[i] = 0;
 264                 }
 265         }
 266         /* Freeing previously allocated receive buffers */
 267         for (i = 0; i < NUM_RX_BUFFERS; i++){
 268                 rx_skbuff = lp->rx_skbuff[i];
 269                 if(rx_skbuff != NULL){
 270                         pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[i],
 271                                   lp->rx_buff_len - 2,PCI_DMA_FROMDEVICE);
 272                         dev_kfree_skb(lp->rx_skbuff[i]);
 273                         lp->rx_skbuff[i] = NULL;
 274                         lp->rx_dma_addr[i] = 0;
 275                 }
 276         }
 277
 278         return 0;
 279 }
 280
 281 /*
 282 This will set the receive buffer length corresponding to the mtu size of networkinterface.
 283 */
 284 static inline void amd8111e_set_rx_buff_len(struct net_device* dev)
 285 {
 286         struct amd8111e_priv* lp = netdev_priv(dev);
 287         unsigned int mtu = dev->mtu;
 288
 289         if (mtu > ETH_DATA_LEN){
 290                 /* MTU + ethernet header + FCS
 291                 + optional VLAN tag + skb reserve space 2 */
 292
 293                 lp->rx_buff_len = mtu + ETH_HLEN + 10;
 294                 lp->options |= OPTION_JUMBO_ENABLE;
 295         } else{
 296                 lp->rx_buff_len = PKT_BUFF_SZ;
 297                 lp->options &= ~OPTION_JUMBO_ENABLE;
 298         }
 299 }
 300
 301 /*
 302 This function will free all the previously allocated buffers, determine new receive buffer length  and will allocate new receive buffers. This function also allocates and initializes both the transmitter and receive hardware descriptors.
 303  */
 304 static int amd8111e_init_ring(struct net_device *dev)
 305 {
 306         struct amd8111e_priv *lp = netdev_priv(dev);
 307         int i;
 308
 309         lp->rx_idx = lp->tx_idx = 0;
 310         lp->tx_complete_idx = 0;
 311         lp->tx_ring_idx = 0;
 312
 313
 314         if(lp->opened)
 315                 /* Free previously allocated transmit and receive skbs */
 316                 amd8111e_free_skbs(dev);
 317
 318         else{
 319                  /* allocate the tx and rx descriptors */
 320                 if((lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
 321                         sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,
 322                         &lp->tx_ring_dma_addr)) == NULL)
 323
 324                         goto err_no_mem;
 325
 326                 if((lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
 327                         sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,
 328                         &lp->rx_ring_dma_addr)) == NULL)
 329
 330                         goto err_free_tx_ring;
 331
 332         }
 333         /* Set new receive buff size */
 334         amd8111e_set_rx_buff_len(dev);
 335
 336         /* Allocating receive  skbs */
 337         for (i = 0; i < NUM_RX_BUFFERS; i++) {
 338
 339                 if (!(lp->rx_skbuff[i] = dev_alloc_skb(lp->rx_buff_len))) {
 340                                 /* Release previos allocated skbs */
 341                                 for(--i; i >= 0 ;i--)
 342                                         dev_kfree_skb(lp->rx_skbuff[i]);
 343                                 goto err_free_rx_ring;
 344                 }
 345                 skb_reserve(lp->rx_skbuff[i],2);
 346         }
 347         /* Initilaizing receive descriptors */
 348         for (i = 0; i < NUM_RX_BUFFERS; i++) {
 349                 lp->rx_dma_addr[i] = pci_map_single(lp->pci_dev,
 350                         lp->rx_skbuff[i]->data,lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 351
 352                 lp->rx_ring[i].buff_phy_addr = cpu_to_le32(lp->rx_dma_addr[i]);
 353                 lp->rx_ring[i].buff_count = cpu_to_le16(lp->rx_buff_len-2);
 354                 wmb();
 355                 lp->rx_ring[i].rx_flags = cpu_to_le16(OWN_BIT);
 356         }
 357
 358         /* Initializing transmit descriptors */
 359         for (i = 0; i < NUM_TX_RING_DR; i++) {
 360                 lp->tx_ring[i].buff_phy_addr = 0;
 361                 lp->tx_ring[i].tx_flags = 0;
 362                 lp->tx_ring[i].buff_count = 0;
 363         }
 364
 365         return 0;
 366
 367 err_free_rx_ring:
 368
 369         pci_free_consistent(lp->pci_dev,
 370                 sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,lp->rx_ring,
 371                 lp->rx_ring_dma_addr);
 372
 373 err_free_tx_ring:
 374
 375         pci_free_consistent(lp->pci_dev,
 376                  sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,lp->tx_ring,
 377                  lp->tx_ring_dma_addr);
 378
 379 err_no_mem:
 380         return -ENOMEM;
 381 }
 382 /* This function will set the interrupt coalescing according to the input arguments */
 383 static int amd8111e_set_coalesce(struct net_device * dev, enum coal_mode cmod)
 384 {
 385         unsigned int timeout;
 386         unsigned int event_count;
 387
 388         struct amd8111e_priv *lp = netdev_priv(dev);
 389         void __iomem *mmio = lp->mmio;
 390         struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
 391
 392
 393         switch(cmod)
 394         {
 395                 case RX_INTR_COAL :
 396                         timeout = coal_conf->rx_timeout;
 397                         event_count = coal_conf->rx_event_count;
 398                         if( timeout > MAX_TIMEOUT ||
 399                                         event_count > MAX_EVENT_COUNT )
 400                         return -EINVAL;
 401
 402                         timeout = timeout * DELAY_TIMER_CONV;
 403                         writel(VAL0|STINTEN, mmio+INTEN0);
 404                         writel((u32)DLY_INT_A_R0|( event_count<< 16 )|timeout,
 405                                                         mmio+DLY_INT_A);
 406                         break;
 407
 408                 case TX_INTR_COAL :
 409                         timeout = coal_conf->tx_timeout;
 410                         event_count = coal_conf->tx_event_count;
 411                         if( timeout > MAX_TIMEOUT ||
 412                                         event_count > MAX_EVENT_COUNT )
 413                         return -EINVAL;
 414
 415
 416                         timeout = timeout * DELAY_TIMER_CONV;
 417                         writel(VAL0|STINTEN,mmio+INTEN0);
 418                         writel((u32)DLY_INT_B_T0|( event_count<< 16 )|timeout,
 419                                                          mmio+DLY_INT_B);
 420                         break;
 421
 422                 case DISABLE_COAL:
 423                         writel(0,mmio+STVAL);
 424                         writel(STINTEN, mmio+INTEN0);
 425                         writel(0, mmio +DLY_INT_B);
 426                         writel(0, mmio+DLY_INT_A);
 427                         break;
 428                  case ENABLE_COAL:
 429                        /* Start the timer */
 430                         writel((u32)SOFT_TIMER_FREQ, mmio+STVAL); /*  0.5 sec */
 431                         writel(VAL0|STINTEN, mmio+INTEN0);
 432                         break;
 433                 default:
 434                         break;
 435
 436    }
 437         return 0;
 438
 439 }
 440
 441 /*
 442 This function initializes the device registers  and starts the device.
 443 */
 444 static int amd8111e_restart(struct net_device *dev)
 445 {
 446         struct amd8111e_priv *lp = netdev_priv(dev);
 447         void __iomem *mmio = lp->mmio;
 448         int i,reg_val;
 449
 450         /* stop the chip */
 451          writel(RUN, mmio + CMD0);
 452
 453         if(amd8111e_init_ring(dev))
 454                 return -ENOMEM;
 455
 456         /* enable the port manager and set auto negotiation always */
 457         writel((u32) VAL1|EN_PMGR, mmio + CMD3 );
 458         writel((u32)XPHYANE|XPHYRST , mmio + CTRL2);
 459
 460         amd8111e_set_ext_phy(dev);
 461
 462         /* set control registers */
 463         reg_val = readl(mmio + CTRL1);
 464         reg_val &= ~XMTSP_MASK;
 465         writel( reg_val| XMTSP_128 | CACHE_ALIGN, mmio + CTRL1 );
 466
 467         /* enable interrupt */
 468         writel( APINT5EN | APINT4EN | APINT3EN | APINT2EN | APINT1EN |
 469                 APINT0EN | MIIPDTINTEN | MCCIINTEN | MCCINTEN | MREINTEN |
 470                 SPNDINTEN | MPINTEN | SINTEN | STINTEN, mmio + INTEN0);
 471
 472         writel(VAL3 | LCINTEN | VAL1 | TINTEN0 | VAL0 | RINTEN0, mmio + INTEN0);
 473
 474         /* initialize tx and rx ring base addresses */
 475         writel((u32)lp->tx_ring_dma_addr,mmio + XMT_RING_BASE_ADDR0);
 476         writel((u32)lp->rx_ring_dma_addr,mmio+ RCV_RING_BASE_ADDR0);
 477
 478         writew((u32)NUM_TX_RING_DR, mmio + XMT_RING_LEN0);
 479         writew((u16)NUM_RX_RING_DR, mmio + RCV_RING_LEN0);
 480
 481         /* set default IPG to 96 */
 482         writew((u32)DEFAULT_IPG,mmio+IPG);
 483         writew((u32)(DEFAULT_IPG-IFS1_DELTA), mmio + IFS1);
 484
 485         if(lp->options & OPTION_JUMBO_ENABLE){
 486                 writel((u32)VAL2|JUMBO, mmio + CMD3);
 487                 /* Reset REX_UFLO */
 488                 writel( REX_UFLO, mmio + CMD2);
 489                 /* Should not set REX_UFLO for jumbo frames */
 490                 writel( VAL0 | APAD_XMT|REX_RTRY , mmio + CMD2);
 491         }else{
 492                 writel( VAL0 | APAD_XMT | REX_RTRY|REX_UFLO, mmio + CMD2);
 493                 writel((u32)JUMBO, mmio + CMD3);
 494         }
 495
 496 #if AMD8111E_VLAN_TAG_USED
 497         writel((u32) VAL2|VSIZE|VL_TAG_DEL, mmio + CMD3);
 498 #endif
 499         writel( VAL0 | APAD_XMT | REX_RTRY, mmio + CMD2 );
 500
 501         /* Setting the MAC address to the device */
 502         for(i = 0; i < ETH_ADDR_LEN; i++)
 503                 writeb( dev->dev_addr[i], mmio + PADR + i );
 504
 505         /* Enable interrupt coalesce */
 506         if(lp->options & OPTION_INTR_COAL_ENABLE){
 507                 printk(KERN_INFO "%s: Interrupt Coalescing Enabled.\n",
 508                                                                 dev->name);
 509                 amd8111e_set_coalesce(dev,ENABLE_COAL);
 510         }
 511
 512         /* set RUN bit to start the chip */
 513         writel(VAL2 | RDMD0, mmio + CMD0);
 514         writel(VAL0 | INTREN | RUN, mmio + CMD0);
 515
 516         /* To avoid PCI posting bug */
 517         readl(mmio+CMD0);
 518         return 0;
 519 }
 520 /*
 521 This function clears necessary the device registers.
 522 */
 523 static void amd8111e_init_hw_default( struct amd8111e_priv* lp)
 524 {
 525         unsigned int reg_val;
 526         unsigned int logic_filter[2] ={0,};
 527         void __iomem *mmio = lp->mmio;
 528
 529
 530         /* stop the chip */
 531         writel(RUN, mmio + CMD0);
 532
 533         /* AUTOPOLL0 Register *//*TBD default value is 8100 in FPS */
 534         writew( 0x8100 | lp->ext_phy_addr, mmio + AUTOPOLL0);
 535
 536         /* Clear RCV_RING_BASE_ADDR */
 537         writel(0, mmio + RCV_RING_BASE_ADDR0);
 538
 539         /* Clear XMT_RING_BASE_ADDR */
 540         writel(0, mmio + XMT_RING_BASE_ADDR0);
 541         writel(0, mmio + XMT_RING_BASE_ADDR1);
 542         writel(0, mmio + XMT_RING_BASE_ADDR2);
 543         writel(0, mmio + XMT_RING_BASE_ADDR3);
 544
 545         /* Clear CMD0  */
 546         writel(CMD0_CLEAR,mmio + CMD0);
 547
 548         /* Clear CMD2 */
 549         writel(CMD2_CLEAR, mmio +CMD2);
 550
 551         /* Clear CMD7 */
 552         writel(CMD7_CLEAR , mmio + CMD7);
 553
 554         /* Clear DLY_INT_A and DLY_INT_B */
 555         writel(0x0, mmio + DLY_INT_A);
 556         writel(0x0, mmio + DLY_INT_B);
 557
 558         /* Clear FLOW_CONTROL */
 559         writel(0x0, mmio + FLOW_CONTROL);
 560
 561         /* Clear INT0  write 1 to clear register */
 562         reg_val = readl(mmio + INT0);
 563         writel(reg_val, mmio + INT0);
 564
 565         /* Clear STVAL */
 566         writel(0x0, mmio + STVAL);
 567
 568         /* Clear INTEN0 */
 569         writel( INTEN0_CLEAR, mmio + INTEN0);
 570
 571         /* Clear LADRF */
 572         writel(0x0 , mmio + LADRF);
 573
 574         /* Set SRAM_SIZE & SRAM_BOUNDARY registers  */
 575         writel( 0x80010,mmio + SRAM_SIZE);
 576
 577         /* Clear RCV_RING0_LEN */
 578         writel(0x0, mmio +  RCV_RING_LEN0);
 579
 580         /* Clear XMT_RING0/1/2/3_LEN */
 581         writel(0x0, mmio +  XMT_RING_LEN0);
 582         writel(0x0, mmio +  XMT_RING_LEN1);
 583         writel(0x0, mmio +  XMT_RING_LEN2);
 584         writel(0x0, mmio +  XMT_RING_LEN3);
 585
 586         /* Clear XMT_RING_LIMIT */
 587         writel(0x0, mmio + XMT_RING_LIMIT);
 588
 589         /* Clear MIB */
 590         writew(MIB_CLEAR, mmio + MIB_ADDR);
 591
 592         /* Clear LARF */
 593         amd8111e_writeq(*(u64*)logic_filter,mmio+LADRF);
 594
 595         /* SRAM_SIZE register */
 596         reg_val = readl(mmio + SRAM_SIZE);
 597
 598         if(lp->options & OPTION_JUMBO_ENABLE)
 599                 writel( VAL2|JUMBO, mmio + CMD3);
 600 #if AMD8111E_VLAN_TAG_USED
 601         writel(VAL2|VSIZE|VL_TAG_DEL, mmio + CMD3 );
 602 #endif
 603         /* Set default value to CTRL1 Register */
 604         writel(CTRL1_DEFAULT, mmio + CTRL1);
 605
 606         /* To avoid PCI posting bug */
 607         readl(mmio + CMD2);
 608
 609 }
 610
 611 /*
 612 This function disables the interrupt and clears all the pending
 613 interrupts in INT0
 614  */
 615 static void amd8111e_disable_interrupt(struct amd8111e_priv* lp)
 616 {
 617         u32 intr0;
 618
 619         /* Disable interrupt */
 620         writel(INTREN, lp->mmio + CMD0);
 621
 622         /* Clear INT0 */
 623         intr0 = readl(lp->mmio + INT0);
 624         writel(intr0, lp->mmio + INT0);
 625
 626         /* To avoid PCI posting bug */
 627         readl(lp->mmio + INT0);
 628
 629 }
 630
 631 /*
 632 This function stops the chip.
 633 */
 634 static void amd8111e_stop_chip(struct amd8111e_priv* lp)
 635 {
 636         writel(RUN, lp->mmio + CMD0);
 637
 638         /* To avoid PCI posting bug */
 639         readl(lp->mmio + CMD0);
 640 }
 641
 642 /*
 643 This function frees the  transmiter and receiver descriptor rings.
 644 */
 645 static void amd8111e_free_ring(struct amd8111e_priv* lp)
 646 {
 647
 648         /* Free transmit and receive skbs */
 649         amd8111e_free_skbs(lp->amd8111e_net_dev);
 650
 651         /* Free transmit and receive descriptor rings */
 652         if(lp->rx_ring){
 653                 pci_free_consistent(lp->pci_dev,
 654                         sizeof(struct amd8111e_rx_dr)*NUM_RX_RING_DR,
 655                         lp->rx_ring, lp->rx_ring_dma_addr);
 656                 lp->rx_ring = NULL;
 657         }
 658
 659         if(lp->tx_ring){
 660                 pci_free_consistent(lp->pci_dev,
 661                         sizeof(struct amd8111e_tx_dr)*NUM_TX_RING_DR,
 662                         lp->tx_ring, lp->tx_ring_dma_addr);
 663
 664                 lp->tx_ring = NULL;
 665         }
 666
 667 }
 668 #if AMD8111E_VLAN_TAG_USED
 669 /*
 670 This is the receive indication function for packets with vlan tag.
 671 */
 672 static int amd8111e_vlan_rx(struct amd8111e_priv *lp, struct sk_buff *skb, u16 vlan_tag)
 673 {
 674 #ifdef CONFIG_AMD8111E_NAPI
 675         return vlan_hwaccel_receive_skb(skb, lp->vlgrp,vlan_tag);
 676 #else
 677         return vlan_hwaccel_rx(skb, lp->vlgrp, vlan_tag);
 678 #endif /* CONFIG_AMD8111E_NAPI */
 679 }
 680 #endif
 681
 682 /*
 683 This function will free all the transmit skbs that are actually transmitted by the device. It will check the ownership of the skb before freeing the skb.
 684 */
 685 static int amd8111e_tx(struct net_device *dev)
 686 {
 687         struct amd8111e_priv* lp = netdev_priv(dev);
 688         int tx_index = lp->tx_complete_idx & TX_RING_DR_MOD_MASK;
 689         int status;
 690         /* Complete all the transmit packet */
 691         while (lp->tx_complete_idx != lp->tx_idx){
 692                 tx_index =  lp->tx_complete_idx & TX_RING_DR_MOD_MASK;
 693                 status = le16_to_cpu(lp->tx_ring[tx_index].tx_flags);
 694
 695                 if(status & OWN_BIT)
 696                         break;  /* It still hasn't been Txed */
 697
 698                 lp->tx_ring[tx_index].buff_phy_addr = 0;
 699
 700                 /* We must free the original skb */
 701                 if (lp->tx_skbuff[tx_index]) {
 702                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[tx_index],
 703                                         lp->tx_skbuff[tx_index]->len,
 704                                         PCI_DMA_TODEVICE);
 705                         dev_kfree_skb_irq (lp->tx_skbuff[tx_index]);
 706                         lp->tx_skbuff[tx_index] = NULL;
 707                         lp->tx_dma_addr[tx_index] = 0;
 708                 }
 709                 lp->tx_complete_idx++;
 710                 /*COAL update tx coalescing parameters */
 711                 lp->coal_conf.tx_packets++;
 712                 lp->coal_conf.tx_bytes += lp->tx_ring[tx_index].buff_count;
 713
 714                 if (netif_queue_stopped(dev) &&
 715                         lp->tx_complete_idx > lp->tx_idx - NUM_TX_BUFFERS +2){
 716                         /* The ring is no longer full, clear tbusy. */
 717                         /* lp->tx_full = 0; */
 718                         netif_wake_queue (dev);
 719                 }
 720         }
 721         return 0;
 722 }
 723
 724 #ifdef CONFIG_AMD8111E_NAPI
 725 /* This function handles the driver receive operation in polling mode */
 726 static int amd8111e_rx_poll(struct napi_struct *napi, int budget)
 727 {
 728         struct amd8111e_priv *lp = container_of(napi, struct amd8111e_priv, napi);
 729         struct net_device *dev = lp->amd8111e_net_dev;
 730         int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
 731         void __iomem *mmio = lp->mmio;
 732         struct sk_buff *skb,*new_skb;
 733         int min_pkt_len, status;
 734         unsigned int intr0;
 735         int num_rx_pkt = 0;
 736         /*int max_rx_pkt = NUM_RX_BUFFERS;*/
 737         short pkt_len;
 738 #if AMD8111E_VLAN_TAG_USED
 739         short vtag;
 740 #endif
 741         int rx_pkt_limit = budget;
 742         unsigned long flags;
 743
 744         do{
 745                 /* process receive packets until we use the quota*/
 746                 /* If we own the next entry, it's a new packet. Send it up. */
 747                 while(1) {
 748                         status = le16_to_cpu(lp->rx_ring[rx_index].rx_flags);
 749                         if (status & OWN_BIT)
 750                                 break;
 751
 752                         /*
 753                          * There is a tricky error noted by John Murphy,
 754                          * <murf@perftech.com> to Russ Nelson: Even with
 755                          * full-sized * buffers it's possible for a
 756                          * jabber packet to use two buffers, with only
 757                          * the last correctly noting the error.
 758                          */
 759
 760                         if(status & ERR_BIT) {
 761                                 /* reseting flags */
 762                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 763                                 goto err_next_pkt;
 764                         }
 765                         /* check for STP and ENP */
 766                         if(!((status & STP_BIT) && (status & ENP_BIT))){
 767                                 /* reseting flags */
 768                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 769                                 goto err_next_pkt;
 770                         }
 771                         pkt_len = le16_to_cpu(lp->rx_ring[rx_index].msg_count) - 4;
 772
 773 #if AMD8111E_VLAN_TAG_USED
 774                         vtag = status & TT_MASK;
 775                         /*MAC will strip vlan tag*/
 776                         if(lp->vlgrp != NULL && vtag !=0)
 777                                 min_pkt_len =MIN_PKT_LEN - 4;
 778                         else
 779 #endif
 780                                 min_pkt_len =MIN_PKT_LEN;
 781
 782                         if (pkt_len < min_pkt_len) {
 783                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 784                                 lp->drv_rx_errors++;
 785                                 goto err_next_pkt;
 786                         }
 787                         if(--rx_pkt_limit < 0)
 788                                 goto rx_not_empty;
 789                         if(!(new_skb = dev_alloc_skb(lp->rx_buff_len))){
 790                                 /* if allocation fail,
 791                                    ignore that pkt and go to next one */
 792                                 lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 793                                 lp->drv_rx_errors++;
 794                                 goto err_next_pkt;
 795                         }
 796
 797                         skb_reserve(new_skb, 2);
 798                         skb = lp->rx_skbuff[rx_index];
 799                         pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[rx_index],
 800                                          lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 801                         skb_put(skb, pkt_len);
 802                         lp->rx_skbuff[rx_index] = new_skb;
 803                         lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 804                                                                    new_skb->data,
 805                                                                    lp->rx_buff_len-2,
 806                                                                    PCI_DMA_FROMDEVICE);
 807
 808                         skb->protocol = eth_type_trans(skb, dev);
 809
 810 #if AMD8111E_VLAN_TAG_USED
 811                         if(lp->vlgrp != NULL && (vtag == TT_VLAN_TAGGED)){
 812                                 amd8111e_vlan_rx(lp, skb,
 813                                          le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info));
 814                         } else
 815 #endif
 816                                 netif_receive_skb(skb);
 817                         /*COAL update rx coalescing parameters*/
 818                         lp->coal_conf.rx_packets++;
 819                         lp->coal_conf.rx_bytes += pkt_len;
 820                         num_rx_pkt++;
 821                         dev->last_rx = jiffies;
 822
 823                 err_next_pkt:
 824                         lp->rx_ring[rx_index].buff_phy_addr
 825                                 = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 826                         lp->rx_ring[rx_index].buff_count =
 827                                 cpu_to_le16(lp->rx_buff_len-2);
 828                         wmb();
 829                         lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 830                         rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 831                 }
 832                 /* Check the interrupt status register for more packets in the
 833                    mean time. Process them since we have not used up our quota.*/
 834
 835                 intr0 = readl(mmio + INT0);
 836                 /*Ack receive packets */
 837                 writel(intr0 & RINT0,mmio + INT0);
 838
 839         } while(intr0 & RINT0);
 840
 841         /* Receive descriptor is empty now */
 842         spin_lock_irqsave(&lp->lock, flags);
 843         __netif_rx_complete(dev, napi);
 844         writel(VAL0|RINTEN0, mmio + INTEN0);
 845         writel(VAL2 | RDMD0, mmio + CMD0);
 846         spin_unlock_irqrestore(&lp->lock, flags);
 847
 848 rx_not_empty:
 849         return num_rx_pkt;
 850 }
 851
 852 #else
 853 /*
 854 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.
 855 */
 856 static int amd8111e_rx(struct net_device *dev)
 857 {
 858         struct amd8111e_priv *lp = netdev_priv(dev);
 859         struct sk_buff *skb,*new_skb;
 860         int rx_index = lp->rx_idx & RX_RING_DR_MOD_MASK;
 861         int min_pkt_len, status;
 862         int num_rx_pkt = 0;
 863         int max_rx_pkt = NUM_RX_BUFFERS;
 864         short pkt_len;
 865 #if AMD8111E_VLAN_TAG_USED
 866         short vtag;
 867 #endif
 868
 869         /* If we own the next entry, it's a new packet. Send it up. */
 870         while(++num_rx_pkt <= max_rx_pkt){
 871                 status = le16_to_cpu(lp->rx_ring[rx_index].rx_flags);
 872                 if(status & OWN_BIT)
 873                         return 0;
 874
 875                 /* check if err summary bit is set */
 876                 if(status & ERR_BIT){
 877                         /*
 878                          * There is a tricky error noted by John Murphy,
 879                          * <murf@perftech.com> to Russ Nelson: Even with full-sized
 880                          * buffers it's possible for a jabber packet to use two
 881                          * buffers, with only the last correctly noting the error.                       */
 882                         /* reseting flags */
 883                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 884                         goto err_next_pkt;
 885                 }
 886                 /* check for STP and ENP */
 887                 if(!((status & STP_BIT) && (status & ENP_BIT))){
 888                         /* reseting flags */
 889                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 890                         goto err_next_pkt;
 891                 }
 892                 pkt_len = le16_to_cpu(lp->rx_ring[rx_index].msg_count) - 4;
 893
 894 #if AMD8111E_VLAN_TAG_USED
 895                 vtag = status & TT_MASK;
 896                 /*MAC will strip vlan tag*/
 897                 if(lp->vlgrp != NULL && vtag !=0)
 898                         min_pkt_len =MIN_PKT_LEN - 4;
 899                 else
 900 #endif
 901                         min_pkt_len =MIN_PKT_LEN;
 902
 903                 if (pkt_len < min_pkt_len) {
 904                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 905                         lp->drv_rx_errors++;
 906                         goto err_next_pkt;
 907                 }
 908                 if(!(new_skb = dev_alloc_skb(lp->rx_buff_len))){
 909                         /* if allocation fail,
 910                                 ignore that pkt and go to next one */
 911                         lp->rx_ring[rx_index].rx_flags &= RESET_RX_FLAGS;
 912                         lp->drv_rx_errors++;
 913                         goto err_next_pkt;
 914                 }
 915
 916                 skb_reserve(new_skb, 2);
 917                 skb = lp->rx_skbuff[rx_index];
 918                 pci_unmap_single(lp->pci_dev,lp->rx_dma_addr[rx_index],
 919                         lp->rx_buff_len-2, PCI_DMA_FROMDEVICE);
 920                 skb_put(skb, pkt_len);
 921                 lp->rx_skbuff[rx_index] = new_skb;
 922                 lp->rx_dma_addr[rx_index] = pci_map_single(lp->pci_dev,
 923                         new_skb->data, lp->rx_buff_len-2,PCI_DMA_FROMDEVICE);
 924
 925                 skb->protocol = eth_type_trans(skb, dev);
 926
 927 #if AMD8111E_VLAN_TAG_USED
 928                 if(lp->vlgrp != NULL && (vtag == TT_VLAN_TAGGED)){
 929                         amd8111e_vlan_rx(lp, skb,
 930                                  le16_to_cpu(lp->rx_ring[rx_index].tag_ctrl_info));
 931                 } else
 932 #endif
 933
 934                         netif_rx (skb);
 935                         /*COAL update rx coalescing parameters*/
 936                         lp->coal_conf.rx_packets++;
 937                         lp->coal_conf.rx_bytes += pkt_len;
 938
 939                         dev->last_rx = jiffies;
 940
 941 err_next_pkt:
 942                 lp->rx_ring[rx_index].buff_phy_addr
 943                          = cpu_to_le32(lp->rx_dma_addr[rx_index]);
 944                 lp->rx_ring[rx_index].buff_count =
 945                                 cpu_to_le16(lp->rx_buff_len-2);
 946                 wmb();
 947                 lp->rx_ring[rx_index].rx_flags |= cpu_to_le16(OWN_BIT);
 948                 rx_index = (++lp->rx_idx) & RX_RING_DR_MOD_MASK;
 949         }
 950
 951         return 0;
 952 }
 953 #endif /* CONFIG_AMD8111E_NAPI */
 954 /*
 955 This function will indicate the link status to the kernel.
 956 */
 957 static int amd8111e_link_change(struct net_device* dev)
 958 {
 959         struct amd8111e_priv *lp = netdev_priv(dev);
 960         int status0,speed;
 961
 962         /* read the link change */
 963         status0 = readl(lp->mmio + STAT0);
 964
 965         if(status0 & LINK_STATS){
 966                 if(status0 & AUTONEG_COMPLETE)
 967                         lp->link_config.autoneg = AUTONEG_ENABLE;
 968                 else
 969                         lp->link_config.autoneg = AUTONEG_DISABLE;
 970
 971                 if(status0 & FULL_DPLX)
 972                         lp->link_config.duplex = DUPLEX_FULL;
 973                 else
 974                         lp->link_config.duplex = DUPLEX_HALF;
 975                 speed = (status0 & SPEED_MASK) >> 7;
 976                 if(speed == PHY_SPEED_10)
 977                         lp->link_config.speed = SPEED_10;
 978                 else if(speed == PHY_SPEED_100)
 979                         lp->link_config.speed = SPEED_100;
 980
 981                 printk(KERN_INFO "%s: Link is Up. Speed is %s Mbps %s Duplex\n",                        dev->name,
 982                        (lp->link_config.speed == SPEED_100) ? "100": "10",
 983                        (lp->link_config.duplex == DUPLEX_FULL)? "Full": "Half");
 984                 netif_carrier_on(dev);
 985         }
 986         else{
 987                 lp->link_config.speed = SPEED_INVALID;
 988                 lp->link_config.duplex = DUPLEX_INVALID;
 989                 lp->link_config.autoneg = AUTONEG_INVALID;
 990                 printk(KERN_INFO "%s: Link is Down.\n",dev->name);
 991                 netif_carrier_off(dev);
 992         }
 993
 994         return 0;
 995 }
 996 /*
 997 This function reads the mib counters.
 998 */
 999 static int amd8111e_read_mib(void __iomem *mmio, u8 MIB_COUNTER)
1000 {
1001         unsigned int  status;
1002         unsigned  int data;
1003         unsigned int repeat = REPEAT_CNT;
1004
1005         writew( MIB_RD_CMD | MIB_COUNTER, mmio + MIB_ADDR);
1006         do {
1007                 status = readw(mmio + MIB_ADDR);
1008                 udelay(2);      /* controller takes MAX 2 us to get mib data */
1009         }
1010         while (--repeat && (status & MIB_CMD_ACTIVE));
1011
1012         data = readl(mmio + MIB_DATA);
1013         return data;
1014 }
1015
1016 /*
1017 This function reads the mib registers and returns the hardware statistics. It  updates previous internal driver statistics with new values.
1018 */
1019 static struct net_device_stats *amd8111e_get_stats(struct net_device * dev)
1020 {
1021         struct amd8111e_priv *lp = netdev_priv(dev);
1022         void __iomem *mmio = lp->mmio;
1023         unsigned long flags;
1024         /* struct net_device_stats *prev_stats = &lp->prev_stats; */
1025         struct net_device_stats* new_stats = &lp->stats;
1026
1027         if(!lp->opened)
1028                 return &lp->stats;
1029         spin_lock_irqsave (&lp->lock, flags);
1030
1031         /* stats.rx_packets */
1032         new_stats->rx_packets = amd8111e_read_mib(mmio, rcv_broadcast_pkts)+
1033                                 amd8111e_read_mib(mmio, rcv_multicast_pkts)+
1034                                 amd8111e_read_mib(mmio, rcv_unicast_pkts);
1035
1036         /* stats.tx_packets */
1037         new_stats->tx_packets = amd8111e_read_mib(mmio, xmt_packets);
1038
1039         /*stats.rx_bytes */
1040         new_stats->rx_bytes = amd8111e_read_mib(mmio, rcv_octets);
1041
1042         /* stats.tx_bytes */
1043         new_stats->tx_bytes = amd8111e_read_mib(mmio, xmt_octets);
1044
1045         /* stats.rx_errors */
1046         /* hw errors + errors driver reported */
1047         new_stats->rx_errors = amd8111e_read_mib(mmio, rcv_undersize_pkts)+
1048                                 amd8111e_read_mib(mmio, rcv_fragments)+
1049                                 amd8111e_read_mib(mmio, rcv_jabbers)+
1050                                 amd8111e_read_mib(mmio, rcv_alignment_errors)+
1051                                 amd8111e_read_mib(mmio, rcv_fcs_errors)+
1052                                 amd8111e_read_mib(mmio, rcv_miss_pkts)+
1053                                 lp->drv_rx_errors;
1054
1055         /* stats.tx_errors */
1056         new_stats->tx_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
1057
1058         /* stats.rx_dropped*/
1059         new_stats->rx_dropped = amd8111e_read_mib(mmio, rcv_miss_pkts);
1060
1061         /* stats.tx_dropped*/
1062         new_stats->tx_dropped = amd8111e_read_mib(mmio,  xmt_underrun_pkts);
1063
1064         /* stats.multicast*/
1065         new_stats->multicast = amd8111e_read_mib(mmio, rcv_multicast_pkts);
1066
1067         /* stats.collisions*/
1068         new_stats->collisions = amd8111e_read_mib(mmio, xmt_collisions);
1069
1070         /* stats.rx_length_errors*/
1071         new_stats->rx_length_errors =
1072                 amd8111e_read_mib(mmio, rcv_undersize_pkts)+
1073                 amd8111e_read_mib(mmio, rcv_oversize_pkts);
1074
1075         /* stats.rx_over_errors*/
1076         new_stats->rx_over_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1077
1078         /* stats.rx_crc_errors*/
1079         new_stats->rx_crc_errors = amd8111e_read_mib(mmio, rcv_fcs_errors);
1080
1081         /* stats.rx_frame_errors*/
1082         new_stats->rx_frame_errors =
1083                 amd8111e_read_mib(mmio, rcv_alignment_errors);
1084
1085         /* stats.rx_fifo_errors */
1086         new_stats->rx_fifo_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1087
1088         /* stats.rx_missed_errors */
1089         new_stats->rx_missed_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);
1090
1091         /* stats.tx_aborted_errors*/
1092         new_stats->tx_aborted_errors =
1093                 amd8111e_read_mib(mmio, xmt_excessive_collision);
1094
1095         /* stats.tx_carrier_errors*/
1096         new_stats->tx_carrier_errors =
1097                 amd8111e_read_mib(mmio, xmt_loss_carrier);
1098
1099         /* stats.tx_fifo_errors*/
1100         new_stats->tx_fifo_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);
1101
1102         /* stats.tx_window_errors*/
1103         new_stats->tx_window_errors =
1104                 amd8111e_read_mib(mmio, xmt_late_collision);
1105
1106         /* Reset the mibs for collecting new statistics */
1107         /* writew(MIB_CLEAR, mmio + MIB_ADDR);*/
1108
1109         spin_unlock_irqrestore (&lp->lock, flags);
1110
1111         return new_stats;
1112 }
1113 /* This function recalculate the interupt coalescing  mode on every interrupt
1114 according to the datarate and the packet rate.
1115 */
1116 static int amd8111e_calc_coalesce(struct net_device *dev)
1117 {
1118         struct amd8111e_priv *lp = netdev_priv(dev);
1119         struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
1120         int tx_pkt_rate;
1121         int rx_pkt_rate;
1122         int tx_data_rate;
1123         int rx_data_rate;
1124         int rx_pkt_size;
1125         int tx_pkt_size;
1126
1127         tx_pkt_rate = coal_conf->tx_packets - coal_conf->tx_prev_packets;
1128         coal_conf->tx_prev_packets =  coal_conf->tx_packets;
1129
1130         tx_data_rate = coal_conf->tx_bytes - coal_conf->tx_prev_bytes;
1131         coal_conf->tx_prev_bytes =  coal_conf->tx_bytes;
1132
1133         rx_pkt_rate = coal_conf->rx_packets - coal_conf->rx_prev_packets;
1134         coal_conf->rx_prev_packets =  coal_conf->rx_packets;
1135
1136         rx_data_rate = coal_conf->rx_bytes - coal_conf->rx_prev_bytes;
1137         coal_conf->rx_prev_bytes =  coal_conf->rx_bytes;
1138
1139         if(rx_pkt_rate < 800){
1140                 if(coal_conf->rx_coal_type != NO_COALESCE){
1141
1142                         coal_conf->rx_timeout = 0x0;
1143                         coal_conf->rx_event_count = 0;
1144                         amd8111e_set_coalesce(dev,RX_INTR_COAL);
1145                         coal_conf->rx_coal_type = NO_COALESCE;
1146                 }
1147         }
1148         else{
1149
1150                 rx_pkt_size = rx_data_rate/rx_pkt_rate;
1151                 if (rx_pkt_size < 128){
1152                         if(coal_conf->rx_coal_type != NO_COALESCE){
1153
1154                                 coal_conf->rx_timeout = 0;
1155                                 coal_conf->rx_event_count = 0;
1156                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1157                                 coal_conf->rx_coal_type = NO_COALESCE;
1158                         }
1159
1160                 }
1161                 else if ( (rx_pkt_size >= 128) && (rx_pkt_size < 512) ){
1162
1163                         if(coal_conf->rx_coal_type !=  LOW_COALESCE){
1164                                 coal_conf->rx_timeout = 1;
1165                                 coal_conf->rx_event_count = 4;
1166                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1167                                 coal_conf->rx_coal_type = LOW_COALESCE;
1168                         }
1169                 }
1170                 else if ((rx_pkt_size >= 512) && (rx_pkt_size < 1024)){
1171
1172                         if(coal_conf->rx_coal_type !=  MEDIUM_COALESCE){
1173                                 coal_conf->rx_timeout = 1;
1174                                 coal_conf->rx_event_count = 4;
1175                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1176                                 coal_conf->rx_coal_type = MEDIUM_COALESCE;
1177                         }
1178
1179                 }
1180                 else if(rx_pkt_size >= 1024){
1181                         if(coal_conf->rx_coal_type !=  HIGH_COALESCE){
1182                                 coal_conf->rx_timeout = 2;
1183                                 coal_conf->rx_event_count = 3;
1184                                 amd8111e_set_coalesce(dev,RX_INTR_COAL);
1185                                 coal_conf->rx_coal_type = HIGH_COALESCE;
1186                         }
1187                 }
1188         }
1189         /* NOW FOR TX INTR COALESC */
1190         if(tx_pkt_rate < 800){
1191                 if(coal_conf->tx_coal_type != NO_COALESCE){
1192
1193                         coal_conf->tx_timeout = 0x0;
1194                         coal_conf->tx_event_count = 0;
1195                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1196                         coal_conf->tx_coal_type = NO_COALESCE;
1197                 }
1198         }
1199         else{
1200
1201                 tx_pkt_size = tx_data_rate/tx_pkt_rate;
1202                 if (tx_pkt_size < 128){
1203
1204                         if(coal_conf->tx_coal_type != NO_COALESCE){
1205
1206                                 coal_conf->tx_timeout = 0;
1207                                 coal_conf->tx_event_count = 0;
1208                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1209                                 coal_conf->tx_coal_type = NO_COALESCE;
1210                         }
1211
1212                 }
1213                 else if ( (tx_pkt_size >= 128) && (tx_pkt_size < 512) ){
1214
1215                         if(coal_conf->tx_coal_type !=  LOW_COALESCE){
1216                                 coal_conf->tx_timeout = 1;
1217                                 coal_conf->tx_event_count = 2;
1218                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1219                                 coal_conf->tx_coal_type = LOW_COALESCE;
1220
1221                         }
1222                 }
1223                 else if ((tx_pkt_size >= 512) && (tx_pkt_size < 1024)){
1224
1225                         if(coal_conf->tx_coal_type !=  MEDIUM_COALESCE){
1226                                 coal_conf->tx_timeout = 2;
1227                                 coal_conf->tx_event_count = 5;
1228                                 amd8111e_set_coalesce(dev,TX_INTR_COAL);
1229                                 coal_conf->tx_coal_type = MEDIUM_COALESCE;
1230                         }
1231
1232                 }
1233                 else if(tx_pkt_size >= 1024){
1234                         if (tx_pkt_size >= 1024){
1235                                 if(coal_conf->tx_coal_type !=  HIGH_COALESCE){
1236                                         coal_conf->tx_timeout = 4;
1237                                         coal_conf->tx_event_count = 8;
1238                                         amd8111e_set_coalesce(dev,TX_INTR_COAL);
1239                                         coal_conf->tx_coal_type = HIGH_COALESCE;
1240                                 }
1241                         }
1242                 }
1243         }
1244         return 0;
1245
1246 }
1247 /*
1248 This is device interrupt function. It handles transmit, receive,link change and hardware timer interrupts.
1249 */
1250 static irqreturn_t amd8111e_interrupt(int irq, void *dev_id)
1251 {
1252
1253         struct net_device * dev = (struct net_device *) dev_id;
1254         struct amd8111e_priv *lp = netdev_priv(dev);
1255         void __iomem *mmio = lp->mmio;
1256         unsigned int intr0, intren0;
1257         unsigned int handled = 1;
1258
1259         if(unlikely(dev == NULL))
1260                 return IRQ_NONE;
1261
1262         spin_lock(&lp->lock);
1263
1264         /* disabling interrupt */
1265         writel(INTREN, mmio + CMD0);
1266
1267         /* Read interrupt status */
1268         intr0 = readl(mmio + INT0);
1269         intren0 = readl(mmio + INTEN0);
1270
1271         /* Process all the INT event until INTR bit is clear. */
1272
1273         if (!(intr0 & INTR)){
1274                 handled = 0;
1275                 goto err_no_interrupt;
1276         }
1277
1278         /* Current driver processes 4 interrupts : RINT,TINT,LCINT,STINT */
1279         writel(intr0, mmio + INT0);
1280
1281         /* Check if Receive Interrupt has occurred. */
1282 #ifdef CONFIG_AMD8111E_NAPI
1283         if(intr0 & RINT0){
1284                 if(netif_rx_schedule_prep(dev, &lp->napi)){
1285                         /* Disable receive interupts */
1286                         writel(RINTEN0, mmio + INTEN0);
1287                         /* Schedule a polling routine */
1288                         __netif_rx_schedule(dev, &lp->napi);
1289                 }
1290                 else if (intren0 & RINTEN0) {
1291                         printk("************Driver bug! \
1292                                 interrupt while in poll\n");
1293                         /* Fix by disable receive interrupts */
1294                         writel(RINTEN0, mmio + INTEN0);
1295                 }
1296         }
1297 #else
1298         if(intr0 & RINT0){
1299                 amd8111e_rx(dev);
1300                 writel(VAL2 | RDMD0, mmio + CMD0);
1301         }
1302 #endif /* CONFIG_AMD8111E_NAPI */
1303         /* Check if  Transmit Interrupt has occurred. */
1304         if(intr0 & TINT0)
1305                 amd8111e_tx(dev);
1306
1307         /* Check if  Link Change Interrupt has occurred. */
1308         if (intr0 & LCINT)
1309                 amd8111e_link_change(dev);
1310
1311         /* Check if Hardware Timer Interrupt has occurred. */
1312         if (intr0 & STINT)
1313                 amd8111e_calc_coalesce(dev);
1314
1315 err_no_interrupt:
1316         writel( VAL0 | INTREN,mmio + CMD0);
1317
1318         spin_unlock(&lp->lock);
1319
1320         return IRQ_RETVAL(handled);
1321 }
1322
1323 #ifdef CONFIG_NET_POLL_CONTROLLER
1324 static void amd8111e_poll(struct net_device *dev)
1325 {
1326         unsigned long flags;
1327         local_irq_save(flags);
1328         amd8111e_interrupt(0, dev);
1329         local_irq_restore(flags);
1330 }
1331 #endif
1332
1333
1334 /*
1335 This function closes the network interface and updates the statistics so that most recent statistics will be available after the interface is down.
1336 */
1337 static int amd8111e_close(struct net_device * dev)
1338 {
1339         struct amd8111e_priv *lp = netdev_priv(dev);
1340         netif_stop_queue(dev);
1341
1342         napi_disable(&lp->napi);
1343
1344         spin_lock_irq(&lp->lock);
1345
1346         amd8111e_disable_interrupt(lp);
1347         amd8111e_stop_chip(lp);
1348         amd8111e_free_ring(lp);
1349
1350         netif_carrier_off(lp->amd8111e_net_dev);
1351
1352         /* Delete ipg timer */
1353         if(lp->options & OPTION_DYN_IPG_ENABLE)
1354                 del_timer_sync(&lp->ipg_data.ipg_timer);
1355
1356         spin_unlock_irq(&lp->lock);
1357         free_irq(dev->irq, dev);
1358
1359         /* Update the statistics before closing */
1360         amd8111e_get_stats(dev);
1361         lp->opened = 0;
1362         return 0;
1363 }
1364 /* This function opens new interface.It requests irq for the device, initializes the device,buffers and descriptors, and starts the device.
1365 */
1366 static int amd8111e_open(struct net_device * dev )
1367 {
1368         struct amd8111e_priv *lp = netdev_priv(dev);
1369
1370         if(dev->irq ==0 || request_irq(dev->irq, amd8111e_interrupt, IRQF_SHARED,
1371                                          dev->name, dev))
1372                 return -EAGAIN;
1373
1374         napi_enable(&lp->napi);
1375
1376         spin_lock_irq(&lp->lock);
1377
1378         amd8111e_init_hw_default(lp);
1379
1380         if(amd8111e_restart(dev)){
1381                 spin_unlock_irq(&lp->lock);
1382                 napi_disable(&lp->napi);
1383                 if (dev->irq)
1384                         free_irq(dev->irq, dev);
1385                 return -ENOMEM;
1386         }
1387         /* Start ipg timer */
1388         if(lp->options & OPTION_DYN_IPG_ENABLE){
1389                 add_timer(&lp->ipg_data.ipg_timer);
1390                 printk(KERN_INFO "%s: Dynamic IPG Enabled.\n",dev->name);
1391         }
1392
1393         lp->opened = 1;
1394
1395         spin_unlock_irq(&lp->lock);
1396
1397         netif_start_queue(dev);
1398
1399         return 0;
1400 }
1401 /*
1402 This function checks if there is any transmit  descriptors available to queue more packet.
1403 */
1404 static int amd8111e_tx_queue_avail(struct amd8111e_priv* lp )
1405 {
1406         int tx_index = lp->tx_idx & TX_BUFF_MOD_MASK;
1407         if(lp->tx_skbuff[tx_index] != 0)
1408                 return -1;
1409         else
1410                 return 0;
1411
1412 }
1413 /*
1414 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.
1415 */
1416
1417 static int amd8111e_start_xmit(struct sk_buff *skb, struct net_device * dev)
1418 {
1419         struct amd8111e_priv *lp = netdev_priv(dev);
1420         int tx_index;
1421         unsigned long flags;
1422
1423         spin_lock_irqsave(&lp->lock, flags);
1424
1425         tx_index = lp->tx_idx & TX_RING_DR_MOD_MASK;
1426
1427         lp->tx_ring[tx_index].buff_count = cpu_to_le16(skb->len);
1428
1429         lp->tx_skbuff[tx_index] = skb;
1430         lp->tx_ring[tx_index].tx_flags = 0;
1431
1432 #if AMD8111E_VLAN_TAG_USED
1433         if((lp->vlgrp != NULL) && vlan_tx_tag_present(skb)){
1434                 lp->tx_ring[tx_index].tag_ctrl_cmd |=
1435                                 cpu_to_le16(TCC_VLAN_INSERT);
1436                 lp->tx_ring[tx_index].tag_ctrl_info =
1437                                 cpu_to_le16(vlan_tx_tag_get(skb));
1438
1439         }
1440 #endif
1441         lp->tx_dma_addr[tx_index] =
1442             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1443         lp->tx_ring[tx_index].buff_phy_addr =
1444             (u32) cpu_to_le32(lp->tx_dma_addr[tx_index]);
1445
1446         /*  Set FCS and LTINT bits */
1447         wmb();
1448         lp->tx_ring[tx_index].tx_flags |=
1449             cpu_to_le16(OWN_BIT | STP_BIT | ENP_BIT|ADD_FCS_BIT|LTINT_BIT);
1450
1451         lp->tx_idx++;
1452
1453         /* Trigger an immediate send poll. */
1454         writel( VAL1 | TDMD0, lp->mmio + CMD0);
1455         writel( VAL2 | RDMD0,lp->mmio + CMD0);
1456
1457         dev->trans_start = jiffies;
1458
1459         if(amd8111e_tx_queue_avail(lp) < 0){
1460                 netif_stop_queue(dev);
1461         }
1462         spin_unlock_irqrestore(&lp->lock, flags);
1463         return 0;
1464 }
1465 /*
1466 This function returns all the memory mapped registers of the device.
1467 */
1468 static void amd8111e_read_regs(struct amd8111e_priv *lp, u32 *buf)
1469 {
1470         void __iomem *mmio = lp->mmio;
1471         /* Read only necessary registers */
1472         buf[0] = readl(mmio + XMT_RING_BASE_ADDR0);
1473         buf[1] = readl(mmio + XMT_RING_LEN0);
1474         buf[2] = readl(mmio + RCV_RING_BASE_ADDR0);
1475         buf[3] = readl(mmio + RCV_RING_LEN0);
1476         buf[4] = readl(mmio + CMD0);
1477         buf[5] = readl(mmio + CMD2);
1478         buf[6] = readl(mmio + CMD3);
1479         buf[7] = readl(mmio + CMD7);
1480         buf[8] = readl(mmio + INT0);
1481         buf[9] = readl(mmio + INTEN0);
1482         buf[10] = readl(mmio + LADRF);
1483         buf[11] = readl(mmio + LADRF+4);
1484         buf[12] = readl(mmio + STAT0);
1485 }
1486
1487
1488 /*
1489 This function sets promiscuos mode, all-multi mode or the multicast address
1490 list to the device.
1491 */
1492 static void amd8111e_set_multicast_list(struct net_device *dev)
1493 {
1494         struct dev_mc_list* mc_ptr;
1495         struct amd8111e_priv *lp = netdev_priv(dev);
1496         u32 mc_filter[2] ;
1497         int i,bit_num;
1498         if(dev->flags & IFF_PROMISC){
1499                 writel( VAL2 | PROM, lp->mmio + CMD2);
1500                 return;
1501         }
1502         else
1503                 writel( PROM, lp->mmio + CMD2);
1504         if(dev->flags & IFF_ALLMULTI || dev->mc_count > MAX_FILTER_SIZE){
1505                 /* get all multicast packet */
1506                 mc_filter[1] = mc_filter[0] = 0xffffffff;
1507                 lp->mc_list = dev->mc_list;
1508                 lp->options |= OPTION_MULTICAST_ENABLE;
1509                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1510                 return;
1511         }
1512         if( dev->mc_count == 0 ){
1513                 /* get only own packets */
1514                 mc_filter[1] = mc_filter[0] = 0;
1515                 lp->mc_list = NULL;
1516                 lp->options &= ~OPTION_MULTICAST_ENABLE;
1517                 amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
1518                 /* disable promiscous mode */
1519                 writel(PROM, lp->mmio + CMD2);
1520                 return;
1521         }
1522         /* load all the multicast addresses in the logic filter */
1523         lp->options |= OPTION_MULTICAST_ENABLE;
1524         lp->mc_list = dev->mc_list;
1525         mc_filter[1] = mc_filter[0] = 0;
1526         for (i = 0, mc_ptr = dev->mc_list; mc_ptr && i < dev->mc_count;
1527                      i++, mc_ptr = mc_ptr->next) {
1528                 bit_num = (ether_crc_le(ETH_ALEN, mc_ptr->dmi_addr) >> 26) & 0x3f;
1529                 mc_filter[bit_num >> 5] |= 1 << (bit_num & 31);
1530         }
1531         amd8111e_writeq(*(u64*)mc_filter,lp->mmio+ LADRF);
1532
1533         /* To eliminate PCI posting bug */
1534         readl(lp->mmio + CMD2);
1535
1536 }
1537
1538 static void amd8111e_get_drvinfo(struct net_device* dev, struct ethtool_drvinfo *info)
1539 {
1540         struct amd8111e_priv *lp = netdev_priv(dev);
1541         struct pci_dev *pci_dev = lp->pci_dev;
1542         strcpy (info->driver, MODULE_NAME);
1543         strcpy (info->version, MODULE_VERS);
1544         sprintf(info->fw_version,"%u",chip_version);
1545         strcpy (info->bus_info, pci_name(pci_dev));
1546 }
1547
1548 static int amd8111e_get_regs_len(struct net_device *dev)
1549 {
1550         return AMD8111E_REG_DUMP_LEN;
1551 }
1552
1553 static void amd8111e_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
1554 {
1555         struct amd8111e_priv *lp = netdev_priv(dev);
1556         regs->version = 0;
1557         amd8111e_read_regs(lp, buf);
1558 }
1559
1560 static int amd8111e_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1561 {
1562         struct amd8111e_priv *lp = netdev_priv(dev);
1563         spin_lock_irq(&lp->lock);
1564         mii_ethtool_gset(&lp->mii_if, ecmd);
1565         spin_unlock_irq(&lp->lock);
1566         return 0;
1567 }
1568
1569 static int amd8111e_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1570 {
1571         struct amd8111e_priv *lp = netdev_priv(dev);
1572         int res;
1573         spin_lock_irq(&lp->lock);
1574         res = mii_ethtool_sset(&lp->mii_if, ecmd);
1575         spin_unlock_irq(&lp->lock);
1576         return res;
1577 }
1578
1579 static int amd8111e_nway_reset(struct net_device *dev)
1580 {
1581         struct amd8111e_priv *lp = netdev_priv(dev);
1582         return mii_nway_restart(&lp->mii_if);
1583 }
1584
1585 static u32 amd8111e_get_link(struct net_device *dev)
1586 {
1587         struct amd8111e_priv *lp = netdev_priv(dev);
1588         return mii_link_ok(&lp->mii_if);
1589 }
1590
1591 static void amd8111e_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1592 {
1593         struct amd8111e_priv *lp = netdev_priv(dev);
1594         wol_info->supported = WAKE_MAGIC|WAKE_PHY;
1595         if (lp->options & OPTION_WOL_ENABLE)
1596                 wol_info->wolopts = WAKE_MAGIC;
1597 }
1598
1599 static int amd8111e_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
1600 {
1601         struct amd8111e_priv *lp = netdev_priv(dev);
1602         if (wol_info->wolopts & ~(WAKE_MAGIC|WAKE_PHY))
1603                 return -EINVAL;
1604         spin_lock_irq(&lp->lock);
1605         if (wol_info->wolopts & WAKE_MAGIC)
1606                 lp->options |=
1607                         (OPTION_WOL_ENABLE | OPTION_WAKE_MAGIC_ENABLE);
1608         else if(wol_info->wolopts & WAKE_PHY)
1609                 lp->options |=
1610                         (OPTION_WOL_ENABLE | OPTION_WAKE_PHY_ENABLE);
1611         else
1612                 lp->options &= ~OPTION_WOL_ENABLE;
1613         spin_unlock_irq(&lp->lock);
1614         return 0;
1615 }
1616
1617 static const struct ethtool_ops ops = {
1618         .get_drvinfo = amd8111e_get_drvinfo,
1619         .get_regs_len = amd8111e_get_regs_len,
1620         .get_regs = amd8111e_get_regs,
1621         .get_settings = amd8111e_get_settings,
1622         .set_settings = amd8111e_set_settings,
1623         .nway_reset = amd8111e_nway_reset,
1624         .get_link = amd8111e_get_link,
1625         .get_wol = amd8111e_get_wol,
1626         .set_wol = amd8111e_set_wol,
1627 };
1628
1629 /*
1630 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.
1631 */
1632
1633 static int amd8111e_ioctl(struct net_device * dev , struct ifreq *ifr, int cmd)
1634 {
1635         struct mii_ioctl_data *data = if_mii(ifr);
1636         struct amd8111e_priv *lp = netdev_priv(dev);
1637         int err;
1638         u32 mii_regval;
1639
1640         if (!capable(CAP_NET_ADMIN))
1641                 return -EPERM;
1642
1643         switch(cmd) {
1644         case SIOCGMIIPHY:
1645                 data->phy_id = lp->ext_phy_addr;
1646
1647         /* fallthru */
1648         case SIOCGMIIREG:
1649
1650                 spin_lock_irq(&lp->lock);
1651                 err = amd8111e_read_phy(lp, data->phy_id,
1652                         data->reg_num & PHY_REG_ADDR_MASK, &mii_regval);
1653                 spin_unlock_irq(&lp->lock);
1654
1655                 data->val_out = mii_regval;
1656                 return err;
1657
1658         case SIOCSMIIREG:
1659
1660                 spin_lock_irq(&lp->lock);
1661                 err = amd8111e_write_phy(lp, data->phy_id,
1662                         data->reg_num & PHY_REG_ADDR_MASK, data->val_in);
1663                 spin_unlock_irq(&lp->lock);
1664
1665                 return err;
1666
1667         default:
1668                 /* do nothing */
1669                 break;
1670         }
1671         return -EOPNOTSUPP;
1672 }
1673 static int amd8111e_set_mac_address(struct net_device *dev, void *p)
1674 {
1675         struct amd8111e_priv *lp = netdev_priv(dev);
1676         int i;
1677         struct sockaddr *addr = p;
1678
1679         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1680         spin_lock_irq(&lp->lock);
1681         /* Setting the MAC address to the device */
1682         for(i = 0; i < ETH_ADDR_LEN; i++)
1683                 writeb( dev->dev_addr[i], lp->mmio + PADR + i );
1684
1685         spin_unlock_irq(&lp->lock);
1686
1687         return 0;
1688 }
1689
1690 /*
1691 This function changes the mtu of the device. It restarts the device  to initialize the descriptor with new receive buffers.
1692 */
1693 static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
1694 {
1695         struct amd8111e_priv *lp = netdev_priv(dev);
1696         int err;
1697
1698         if ((new_mtu < AMD8111E_MIN_MTU) || (new_mtu > AMD8111E_MAX_MTU))
1699                 return -EINVAL;
1700
1701         if (!netif_running(dev)) {
1702                 /* new_mtu will be used
1703                    when device starts netxt time */
1704                 dev->mtu = new_mtu;
1705                 return 0;
1706         }
1707
1708         spin_lock_irq(&lp->lock);
1709
1710         /* stop the chip */
1711         writel(RUN, lp->mmio + CMD0);
1712
1713         dev->mtu = new_mtu;
1714
1715         err = amd8111e_restart(dev);
1716         spin_unlock_irq(&lp->lock);
1717         if(!err)
1718                 netif_start_queue(dev);
1719         return err;
1720 }
1721
1722 #if AMD8111E_VLAN_TAG_USED
1723 static void amd8111e_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
1724 {
1725         struct  amd8111e_priv *lp = netdev_priv(dev);
1726         spin_lock_irq(&lp->lock);
1727         lp->vlgrp = grp;
1728         spin_unlock_irq(&lp->lock);
1729 }
1730 #endif
1731
1732 static int amd8111e_enable_magicpkt(struct amd8111e_priv* lp)
1733 {
1734         writel( VAL1|MPPLBA, lp->mmio + CMD3);
1735         writel( VAL0|MPEN_SW, lp->mmio + CMD7);
1736
1737         /* To eliminate PCI posting bug */
1738         readl(lp->mmio + CMD7);
1739         return 0;
1740 }
1741
1742 static int amd8111e_enable_link_change(struct amd8111e_priv* lp)
1743 {
1744
1745         /* Adapter is already stoped/suspended/interrupt-disabled */
1746         writel(VAL0|LCMODE_SW,lp->mmio + CMD7);
1747
1748         /* To eliminate PCI posting bug */
1749         readl(lp->mmio + CMD7);
1750         return 0;
1751 }
1752 /* 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 */
1753
1754 static void amd8111e_tx_timeout(struct net_device *dev)
1755 {
1756         struct amd8111e_priv* lp = netdev_priv(dev);
1757         int err;
1758
1759         printk(KERN_ERR "%s: transmit timed out, resetting\n",
1760                                                       dev->name);
1761         spin_lock_irq(&lp->lock);
1762         err = amd8111e_restart(dev);
1763         spin_unlock_irq(&lp->lock);
1764         if(!err)
1765                 netif_wake_queue(dev);
1766 }
1767 static int amd8111e_suspend(struct pci_dev *pci_dev, pm_message_t state)
1768 {
1769         struct net_device *dev = pci_get_drvdata(pci_dev);
1770         struct amd8111e_priv *lp = netdev_priv(dev);
1771
1772         if (!netif_running(dev))
1773                 return 0;
1774
1775         /* disable the interrupt */
1776         spin_lock_irq(&lp->lock);
1777         amd8111e_disable_interrupt(lp);
1778         spin_unlock_irq(&lp->lock);
1779
1780         netif_device_detach(dev);
1781
1782         /* stop chip */
1783         spin_lock_irq(&lp->lock);
1784         if(lp->options & OPTION_DYN_IPG_ENABLE)
1785                 del_timer_sync(&lp->ipg_data.ipg_timer);
1786         amd8111e_stop_chip(lp);
1787         spin_unlock_irq(&lp->lock);
1788
1789         if(lp->options & OPTION_WOL_ENABLE){
1790                  /* enable wol */
1791                 if(lp->options & OPTION_WAKE_MAGIC_ENABLE)
1792                         amd8111e_enable_magicpkt(lp);
1793                 if(lp->options & OPTION_WAKE_PHY_ENABLE)
1794                         amd8111e_enable_link_change(lp);
1795
1796                 pci_enable_wake(pci_dev, PCI_D3hot, 1);
1797                 pci_enable_wake(pci_dev, PCI_D3cold, 1);
1798
1799         }
1800         else{
1801                 pci_enable_wake(pci_dev, PCI_D3hot, 0);
1802                 pci_enable_wake(pci_dev, PCI_D3cold, 0);
1803         }
1804
1805         pci_save_state(pci_dev);
1806         pci_set_power_state(pci_dev, PCI_D3hot);
1807
1808         return 0;
1809 }
1810 static int amd8111e_resume(struct pci_dev *pci_dev)
1811 {
1812         struct net_device *dev = pci_get_drvdata(pci_dev);
1813         struct amd8111e_priv *lp = netdev_priv(dev);
1814
1815         if (!netif_running(dev))
1816                 return 0;
1817
1818         pci_set_power_state(pci_dev, PCI_D0);
1819         pci_restore_state(pci_dev);
1820
1821         pci_enable_wake(pci_dev, PCI_D3hot, 0);
1822         pci_enable_wake(pci_dev, PCI_D3cold, 0); /* D3 cold */
1823
1824         netif_device_attach(dev);
1825
1826         spin_lock_irq(&lp->lock);
1827         amd8111e_restart(dev);
1828         /* Restart ipg timer */
1829         if(lp->options & OPTION_DYN_IPG_ENABLE)
1830                 mod_timer(&lp->ipg_data.ipg_timer,
1831                                 jiffies + IPG_CONVERGE_JIFFIES);
1832         spin_unlock_irq(&lp->lock);
1833
1834         return 0;
1835 }
1836
1837
1838 static void __devexit amd8111e_remove_one(struct pci_dev *pdev)
1839 {
1840         struct net_device *dev = pci_get_drvdata(pdev);
1841         if (dev) {
1842                 unregister_netdev(dev);
1843                 iounmap(((struct amd8111e_priv *)netdev_priv(dev))->mmio);
1844                 free_netdev(dev);
1845                 pci_release_regions(pdev);
1846                 pci_disable_device(pdev);
1847                 pci_set_drvdata(pdev, NULL);
1848         }
1849 }
1850 static void amd8111e_config_ipg(struct net_device* dev)
1851 {
1852         struct amd8111e_priv *lp = netdev_priv(dev);
1853         struct ipg_info* ipg_data = &lp->ipg_data;
1854         void __iomem *mmio = lp->mmio;
1855         unsigned int prev_col_cnt = ipg_data->col_cnt;
1856         unsigned int total_col_cnt;
1857         unsigned int tmp_ipg;
1858
1859         if(lp->link_config.duplex == DUPLEX_FULL){
1860                 ipg_data->ipg = DEFAULT_IPG;
1861                 return;
1862         }
1863
1864         if(ipg_data->ipg_state == SSTATE){
1865
1866                 if(ipg_data->timer_tick == IPG_STABLE_TIME){
1867
1868                         ipg_data->timer_tick = 0;
1869                         ipg_data->ipg = MIN_IPG - IPG_STEP;
1870                         ipg_data->current_ipg = MIN_IPG;
1871                         ipg_data->diff_col_cnt = 0xFFFFFFFF;
1872                         ipg_data->ipg_state = CSTATE;
1873                 }
1874                 else
1875                         ipg_data->timer_tick++;
1876         }
1877
1878         if(ipg_data->ipg_state == CSTATE){
1879
1880                 /* Get the current collision count */
1881
1882                 total_col_cnt = ipg_data->col_cnt =
1883                                 amd8111e_read_mib(mmio, xmt_collisions);
1884
1885                 if ((total_col_cnt - prev_col_cnt) <
1886                                 (ipg_data->diff_col_cnt)){
1887
1888                         ipg_data->diff_col_cnt =
1889                                 total_col_cnt - prev_col_cnt ;
1890
1891                         ipg_data->ipg = ipg_data->current_ipg;
1892                 }
1893
1894                 ipg_data->current_ipg += IPG_STEP;
1895
1896                 if (ipg_data->current_ipg <= MAX_IPG)
1897                         tmp_ipg = ipg_data->current_ipg;
1898                 else{
1899                         tmp_ipg = ipg_data->ipg;
1900                         ipg_data->ipg_state = SSTATE;
1901                 }
1902                 writew((u32)tmp_ipg, mmio + IPG);
1903                 writew((u32)(tmp_ipg - IFS1_DELTA), mmio + IFS1);
1904         }
1905          mod_timer(&lp->ipg_data.ipg_timer, jiffies + IPG_CONVERGE_JIFFIES);
1906         return;
1907
1908 }
1909
1910 static void __devinit amd8111e_probe_ext_phy(struct net_device* dev)
1911 {
1912         struct amd8111e_priv *lp = netdev_priv(dev);
1913         int i;
1914
1915         for (i = 0x1e; i >= 0; i--) {
1916                 u32 id1, id2;
1917
1918                 if (amd8111e_read_phy(lp, i, MII_PHYSID1, &id1))
1919                         continue;
1920                 if (amd8111e_read_phy(lp, i, MII_PHYSID2, &id2))
1921                         continue;
1922                 lp->ext_phy_id = (id1 << 16) | id2;
1923                 lp->ext_phy_addr = i;
1924                 return;
1925         }
1926         lp->ext_phy_id = 0;
1927         lp->ext_phy_addr = 1;
1928 }
1929
1930 static int __devinit amd8111e_probe_one(struct pci_dev *pdev,
1931                                   const struct pci_device_id *ent)
1932 {
1933         int err,i,pm_cap;
1934         unsigned long reg_addr,reg_len;
1935         struct amd8111e_priv* lp;
1936         struct net_device* dev;
1937
1938         err = pci_enable_device(pdev);
1939         if(err){
1940                 printk(KERN_ERR "amd8111e: Cannot enable new PCI device,"
1941                         "exiting.\n");
1942                 return err;
1943         }
1944
1945         if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)){
1946                 printk(KERN_ERR "amd8111e: Cannot find PCI base address"
1947                        "exiting.\n");
1948                 err = -ENODEV;
1949                 goto err_disable_pdev;
1950         }
1951
1952         err = pci_request_regions(pdev, MODULE_NAME);
1953         if(err){
1954                 printk(KERN_ERR "amd8111e: Cannot obtain PCI resources, "
1955                        "exiting.\n");
1956                 goto err_disable_pdev;
1957         }
1958
1959         pci_set_master(pdev);
1960
1961         /* Find power-management capability. */
1962         if((pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM))==0){
1963                 printk(KERN_ERR "amd8111e: No Power Management capability, "
1964                        "exiting.\n");
1965                 goto err_free_reg;
1966         }
1967
1968         /* Initialize DMA */
1969         if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) < 0) {
1970                 printk(KERN_ERR "amd8111e: DMA not supported,"
1971                         "exiting.\n");
1972                 goto err_free_reg;
1973         }
1974
1975         reg_addr = pci_resource_start(pdev, 0);
1976         reg_len = pci_resource_len(pdev, 0);
1977
1978         dev = alloc_etherdev(sizeof(struct amd8111e_priv));
1979         if (!dev) {
1980                 printk(KERN_ERR "amd8111e: Etherdev alloc failed, exiting.\n");
1981                 err = -ENOMEM;
1982                 goto err_free_reg;
1983         }
1984
1985         SET_MODULE_OWNER(dev);
1986         SET_NETDEV_DEV(dev, &pdev->dev);
1987
1988 #if AMD8111E_VLAN_TAG_USED
1989         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX ;
1990         dev->vlan_rx_register =amd8111e_vlan_rx_register;
1991 #endif
1992
1993         lp = netdev_priv(dev);
1994         lp->pci_dev = pdev;
1995         lp->amd8111e_net_dev = dev;
1996         lp->pm_cap = pm_cap;
1997
1998         spin_lock_init(&lp->lock);
1999
2000         lp->mmio = ioremap(reg_addr, reg_len);
2001         if (lp->mmio == 0) {
2002                 printk(KERN_ERR "amd8111e: Cannot map device registers, "
2003                        "exiting\n");
2004                 err = -ENOMEM;
2005                 goto err_free_dev;
2006         }
2007
2008         /* Initializing MAC address */
2009         for(i = 0; i < ETH_ADDR_LEN; i++)
2010                         dev->dev_addr[i] =readb(lp->mmio + PADR + i);
2011
2012         /* Setting user defined parametrs */
2013         lp->ext_phy_option = speed_duplex[card_idx];
2014         if(coalesce[card_idx])
2015                 lp->options |= OPTION_INTR_COAL_ENABLE;
2016         if(dynamic_ipg[card_idx++])
2017                 lp->options |= OPTION_DYN_IPG_ENABLE;
2018
2019         /* Initialize driver entry points */
2020         dev->open = amd8111e_open;
2021         dev->hard_start_xmit = amd8111e_start_xmit;
2022         dev->stop = amd8111e_close;
2023         dev->get_stats = amd8111e_get_stats;
2024         dev->set_multicast_list = amd8111e_set_multicast_list;
2025         dev->set_mac_address = amd8111e_set_mac_address;
2026         dev->do_ioctl = amd8111e_ioctl;
2027         dev->change_mtu = amd8111e_change_mtu;
2028         SET_ETHTOOL_OPS(dev, &ops);
2029         dev->irq =pdev->irq;
2030         dev->tx_timeout = amd8111e_tx_timeout;
2031         dev->watchdog_timeo = AMD8111E_TX_TIMEOUT;
2032 #ifdef CONFIG_AMD8111E_NAPI
2033         netif_napi_add(dev, &lp->napi, amd8111e_rx_poll, 32);
2034 #endif
2035 #ifdef CONFIG_NET_POLL_CONTROLLER
2036         dev->poll_controller = amd8111e_poll;
2037 #endif
2038
2039 #if AMD8111E_VLAN_TAG_USED
2040         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2041         dev->vlan_rx_register =amd8111e_vlan_rx_register;
2042 #endif
2043         /* Probe the external PHY */
2044         amd8111e_probe_ext_phy(dev);
2045
2046         /* setting mii default values */
2047         lp->mii_if.dev = dev;
2048         lp->mii_if.mdio_read = amd8111e_mdio_read;
2049         lp->mii_if.mdio_write = amd8111e_mdio_write;
2050         lp->mii_if.phy_id = lp->ext_phy_addr;
2051
2052         /* Set receive buffer length and set jumbo option*/
2053         amd8111e_set_rx_buff_len(dev);
2054
2055
2056         err = register_netdev(dev);
2057         if (err) {
2058                 printk(KERN_ERR "amd8111e: Cannot register net device, "
2059                        "exiting.\n");
2060                 goto err_iounmap;
2061         }
2062
2063         pci_set_drvdata(pdev, dev);
2064
2065         /* Initialize software ipg timer */
2066         if(lp->options & OPTION_DYN_IPG_ENABLE){
2067                 init_timer(&lp->ipg_data.ipg_timer);
2068                 lp->ipg_data.ipg_timer.data = (unsigned long) dev;
2069                 lp->ipg_data.ipg_timer.function = (void *)&amd8111e_config_ipg;
2070                 lp->ipg_data.ipg_timer.expires = jiffies +
2071                                                  IPG_CONVERGE_JIFFIES;
2072                 lp->ipg_data.ipg = DEFAULT_IPG;
2073                 lp->ipg_data.ipg_state = CSTATE;
2074         };
2075
2076         /*  display driver and device information */
2077
2078         chip_version = (readl(lp->mmio + CHIPID) & 0xf0000000)>>28;
2079         printk(KERN_INFO "%s: AMD-8111e Driver Version: %s\n",                                                           dev->name,MODULE_VERS);
2080         printk(KERN_INFO "%s: [ Rev %x ] PCI 10/100BaseT Ethernet ",                                                    dev->name, chip_version);
2081         for (i = 0; i < 6; i++)
2082                 printk("%2.2x%c",dev->dev_addr[i],i == 5 ? ' ' : ':');
2083         printk( "\n");
2084         if (lp->ext_phy_id)
2085                 printk(KERN_INFO "%s: Found MII PHY ID 0x%08x at address 0x%02x\n",
2086                        dev->name, lp->ext_phy_id, lp->ext_phy_addr);
2087         else
2088                 printk(KERN_INFO "%s: Couldn't detect MII PHY, assuming address 0x01\n",
2089                        dev->name);
2090         return 0;
2091 err_iounmap:
2092         iounmap(lp->mmio);
2093
2094 err_free_dev:
2095         free_netdev(dev);
2096
2097 err_free_reg:
2098         pci_release_regions(pdev);
2099
2100 err_disable_pdev:
2101         pci_disable_device(pdev);
2102         pci_set_drvdata(pdev, NULL);
2103         return err;
2104
2105 }
2106
2107 static struct pci_driver amd8111e_driver = {
2108         .name           = MODULE_NAME,
2109         .id_table       = amd8111e_pci_tbl,
2110         .probe          = amd8111e_probe_one,
2111         .remove         = __devexit_p(amd8111e_remove_one),
2112         .suspend        = amd8111e_suspend,
2113         .resume         = amd8111e_resume
2114 };
2115
2116 static int __init amd8111e_init(void)
2117 {
2118         return pci_register_driver(&amd8111e_driver);
2119 }
2120
2121 static void __exit amd8111e_cleanup(void)
2122 {
2123         pci_unregister_driver(&amd8111e_driver);
2124 }
2125
2126 module_init(amd8111e_init);
2127 module_exit(amd8111e_cleanup);