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

   1 /*
   2  * JMicron JMC2x0 series PCIe Ethernet Linux Device Driver
   3  *
   4  * Copyright 2008 JMicron Technology Corporation
   5  * http://www.jmicron.com/
   6  *
   7  * Author: Guo-Fu Tseng <cooldavid@cooldavid.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/pci.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/ethtool.h>
  30 #include <linux/mii.h>
  31 #include <linux/crc32.h>
  32 #include <linux/delay.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/ipv6.h>
  37 #include <linux/tcp.h>
  38 #include <linux/udp.h>
  39 #include <linux/if_vlan.h>
  40 #include <net/ip6_checksum.h>
  41 #include "jme.h"
  42
  43 static int force_pseudohp = -1;
  44 static int no_pseudohp = -1;
  45 static int no_extplug = -1;
  46 module_param(force_pseudohp, int, 0);
  47 MODULE_PARM_DESC(force_pseudohp,
  48         "Enable pseudo hot-plug feature manually by driver instead of BIOS.");
  49 module_param(no_pseudohp, int, 0);
  50 MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature.");
  51 module_param(no_extplug, int, 0);
  52 MODULE_PARM_DESC(no_extplug,
  53         "Do not use external plug signal for pseudo hot-plug.");
  54
  55 static int
  56 jme_mdio_read(struct net_device *netdev, int phy, int reg)
  57 {
  58         struct jme_adapter *jme = netdev_priv(netdev);
  59         int i, val, again = (reg == MII_BMSR) ? 1 : 0;
  60
  61 read_again:
  62         jwrite32(jme, JME_SMI, SMI_OP_REQ |
  63                                 smi_phy_addr(phy) |
  64                                 smi_reg_addr(reg));
  65
  66         wmb();
  67         for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
  68                 udelay(20);
  69                 val = jread32(jme, JME_SMI);
  70                 if ((val & SMI_OP_REQ) == 0)
  71                         break;
  72         }
  73
  74         if (i == 0) {
  75                 jeprintk(jme->pdev, "phy(%d) read timeout : %d\n", phy, reg);
  76                 return 0;
  77         }
  78
  79         if (again--)
  80                 goto read_again;
  81
  82         return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT;
  83 }
  84
  85 static void
  86 jme_mdio_write(struct net_device *netdev,
  87                                 int phy, int reg, int val)
  88 {
  89         struct jme_adapter *jme = netdev_priv(netdev);
  90         int i;
  91
  92         jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
  93                 ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
  94                 smi_phy_addr(phy) | smi_reg_addr(reg));
  95
  96         wmb();
  97         for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
  98                 udelay(20);
  99                 if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0)
 100                         break;
 101         }
 102
 103         if (i == 0)
 104                 jeprintk(jme->pdev, "phy(%d) write timeout : %d\n", phy, reg);
 105
 106         return;
 107 }
 108
 109 static inline void
 110 jme_reset_phy_processor(struct jme_adapter *jme)
 111 {
 112         u32 val;
 113
 114         jme_mdio_write(jme->dev,
 115                         jme->mii_if.phy_id,
 116                         MII_ADVERTISE, ADVERTISE_ALL |
 117                         ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 118
 119         if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
 120                 jme_mdio_write(jme->dev,
 121                                 jme->mii_if.phy_id,
 122                                 MII_CTRL1000,
 123                                 ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 124
 125         val = jme_mdio_read(jme->dev,
 126                                 jme->mii_if.phy_id,
 127                                 MII_BMCR);
 128
 129         jme_mdio_write(jme->dev,
 130                         jme->mii_if.phy_id,
 131                         MII_BMCR, val | BMCR_RESET);
 132
 133         return;
 134 }
 135
 136 static void
 137 jme_setup_wakeup_frame(struct jme_adapter *jme,
 138                 u32 *mask, u32 crc, int fnr)
 139 {
 140         int i;
 141
 142         /*
 143          * Setup CRC pattern
 144          */
 145         jwrite32(jme, JME_WFOI, WFOI_CRC_SEL | (fnr & WFOI_FRAME_SEL));
 146         wmb();
 147         jwrite32(jme, JME_WFODP, crc);
 148         wmb();
 149
 150         /*
 151          * Setup Mask
 152          */
 153         for (i = 0 ; i < WAKEUP_FRAME_MASK_DWNR ; ++i) {
 154                 jwrite32(jme, JME_WFOI,
 155                                 ((i << WFOI_MASK_SHIFT) & WFOI_MASK_SEL) |
 156                                 (fnr & WFOI_FRAME_SEL));
 157                 wmb();
 158                 jwrite32(jme, JME_WFODP, mask[i]);
 159                 wmb();
 160         }
 161 }
 162
 163 static inline void
 164 jme_reset_mac_processor(struct jme_adapter *jme)
 165 {
 166         u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0};
 167         u32 crc = 0xCDCDCDCD;
 168         u32 gpreg0;
 169         int i;
 170
 171         jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
 172         udelay(2);
 173         jwrite32(jme, JME_GHC, jme->reg_ghc);
 174
 175         jwrite32(jme, JME_RXDBA_LO, 0x00000000);
 176         jwrite32(jme, JME_RXDBA_HI, 0x00000000);
 177         jwrite32(jme, JME_RXQDC, 0x00000000);
 178         jwrite32(jme, JME_RXNDA, 0x00000000);
 179         jwrite32(jme, JME_TXDBA_LO, 0x00000000);
 180         jwrite32(jme, JME_TXDBA_HI, 0x00000000);
 181         jwrite32(jme, JME_TXQDC, 0x00000000);
 182         jwrite32(jme, JME_TXNDA, 0x00000000);
 183
 184         jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
 185         jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
 186         for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i)
 187                 jme_setup_wakeup_frame(jme, mask, crc, i);
 188         if (jme->fpgaver)
 189                 gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL;
 190         else
 191                 gpreg0 = GPREG0_DEFAULT;
 192         jwrite32(jme, JME_GPREG0, gpreg0);
 193         jwrite32(jme, JME_GPREG1, GPREG1_DEFAULT);
 194 }
 195
 196 static inline void
 197 jme_reset_ghc_speed(struct jme_adapter *jme)
 198 {
 199         jme->reg_ghc &= ~(GHC_SPEED_1000M | GHC_DPX);
 200         jwrite32(jme, JME_GHC, jme->reg_ghc);
 201 }
 202
 203 static inline void
 204 jme_clear_pm(struct jme_adapter *jme)
 205 {
 206         jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs);
 207         pci_set_power_state(jme->pdev, PCI_D0);
 208         pci_enable_wake(jme->pdev, PCI_D0, false);
 209 }
 210
 211 static int
 212 jme_reload_eeprom(struct jme_adapter *jme)
 213 {
 214         u32 val;
 215         int i;
 216
 217         val = jread32(jme, JME_SMBCSR);
 218
 219         if (val & SMBCSR_EEPROMD) {
 220                 val |= SMBCSR_CNACK;
 221                 jwrite32(jme, JME_SMBCSR, val);
 222                 val |= SMBCSR_RELOAD;
 223                 jwrite32(jme, JME_SMBCSR, val);
 224                 mdelay(12);
 225
 226                 for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
 227                         mdelay(1);
 228                         if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
 229                                 break;
 230                 }
 231
 232                 if (i == 0) {
 233                         jeprintk(jme->pdev, "eeprom reload timeout\n");
 234                         return -EIO;
 235                 }
 236         }
 237
 238         return 0;
 239 }
 240
 241 static void
 242 jme_load_macaddr(struct net_device *netdev)
 243 {
 244         struct jme_adapter *jme = netdev_priv(netdev);
 245         unsigned char macaddr[6];
 246         u32 val;
 247
 248         spin_lock_bh(&jme->macaddr_lock);
 249         val = jread32(jme, JME_RXUMA_LO);
 250         macaddr[0] = (val >>  0) & 0xFF;
 251         macaddr[1] = (val >>  8) & 0xFF;
 252         macaddr[2] = (val >> 16) & 0xFF;
 253         macaddr[3] = (val >> 24) & 0xFF;
 254         val = jread32(jme, JME_RXUMA_HI);
 255         macaddr[4] = (val >>  0) & 0xFF;
 256         macaddr[5] = (val >>  8) & 0xFF;
 257         memcpy(netdev->dev_addr, macaddr, 6);
 258         spin_unlock_bh(&jme->macaddr_lock);
 259 }
 260
 261 static inline void
 262 jme_set_rx_pcc(struct jme_adapter *jme, int p)
 263 {
 264         switch (p) {
 265         case PCC_OFF:
 266                 jwrite32(jme, JME_PCCRX0,
 267                         ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 268                         ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 269                 break;
 270         case PCC_P1:
 271                 jwrite32(jme, JME_PCCRX0,
 272                         ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 273                         ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 274                 break;
 275         case PCC_P2:
 276                 jwrite32(jme, JME_PCCRX0,
 277                         ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 278                         ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 279                 break;
 280         case PCC_P3:
 281                 jwrite32(jme, JME_PCCRX0,
 282                         ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 283                         ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 284                 break;
 285         default:
 286                 break;
 287         }
 288         wmb();
 289
 290         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
 291                 msg_rx_status(jme, "Switched to PCC_P%d\n", p);
 292 }
 293
 294 static void
 295 jme_start_irq(struct jme_adapter *jme)
 296 {
 297         register struct dynpcc_info *dpi = &(jme->dpi);
 298
 299         jme_set_rx_pcc(jme, PCC_P1);
 300         dpi->cur                = PCC_P1;
 301         dpi->attempt            = PCC_P1;
 302         dpi->cnt                = 0;
 303
 304         jwrite32(jme, JME_PCCTX,
 305                         ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
 306                         ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
 307                         PCCTXQ0_EN
 308                 );
 309
 310         /*
 311          * Enable Interrupts
 312          */
 313         jwrite32(jme, JME_IENS, INTR_ENABLE);
 314 }
 315
 316 static inline void
 317 jme_stop_irq(struct jme_adapter *jme)
 318 {
 319         /*
 320          * Disable Interrupts
 321          */
 322         jwrite32f(jme, JME_IENC, INTR_ENABLE);
 323 }
 324
 325 static inline void
 326 jme_enable_shadow(struct jme_adapter *jme)
 327 {
 328         jwrite32(jme,
 329                  JME_SHBA_LO,
 330                  ((u32)jme->shadow_dma & ~((u32)0x1F)) | SHBA_POSTEN);
 331 }
 332
 333 static inline void
 334 jme_disable_shadow(struct jme_adapter *jme)
 335 {
 336         jwrite32(jme, JME_SHBA_LO, 0x0);
 337 }
 338
 339 static u32
 340 jme_linkstat_from_phy(struct jme_adapter *jme)
 341 {
 342         u32 phylink, bmsr;
 343
 344         phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
 345         bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
 346         if (bmsr & BMSR_ANCOMP)
 347                 phylink |= PHY_LINK_AUTONEG_COMPLETE;
 348
 349         return phylink;
 350 }
 351
 352 static inline void
 353 jme_set_phyfifoa(struct jme_adapter *jme)
 354 {
 355         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
 356 }
 357
 358 static inline void
 359 jme_set_phyfifob(struct jme_adapter *jme)
 360 {
 361         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
 362 }
 363
 364 static int
 365 jme_check_link(struct net_device *netdev, int testonly)
 366 {
 367         struct jme_adapter *jme = netdev_priv(netdev);
 368         u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1;
 369         char linkmsg[64];
 370         int rc = 0;
 371
 372         linkmsg[0] = '\0';
 373
 374         if (jme->fpgaver)
 375                 phylink = jme_linkstat_from_phy(jme);
 376         else
 377                 phylink = jread32(jme, JME_PHY_LINK);
 378
 379         if (phylink & PHY_LINK_UP) {
 380                 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
 381                         /*
 382                          * If we did not enable AN
 383                          * Speed/Duplex Info should be obtained from SMI
 384                          */
 385                         phylink = PHY_LINK_UP;
 386
 387                         bmcr = jme_mdio_read(jme->dev,
 388                                                 jme->mii_if.phy_id,
 389                                                 MII_BMCR);
 390
 391                         phylink |= ((bmcr & BMCR_SPEED1000) &&
 392                                         (bmcr & BMCR_SPEED100) == 0) ?
 393                                         PHY_LINK_SPEED_1000M :
 394                                         (bmcr & BMCR_SPEED100) ?
 395                                         PHY_LINK_SPEED_100M :
 396                                         PHY_LINK_SPEED_10M;
 397
 398                         phylink |= (bmcr & BMCR_FULLDPLX) ?
 399                                          PHY_LINK_DUPLEX : 0;
 400
 401                         strcat(linkmsg, "Forced: ");
 402                 } else {
 403                         /*
 404                          * Keep polling for speed/duplex resolve complete
 405                          */
 406                         while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
 407                                 --cnt) {
 408
 409                                 udelay(1);
 410
 411                                 if (jme->fpgaver)
 412                                         phylink = jme_linkstat_from_phy(jme);
 413                                 else
 414                                         phylink = jread32(jme, JME_PHY_LINK);
 415                         }
 416                         if (!cnt)
 417                                 jeprintk(jme->pdev,
 418                                         "Waiting speed resolve timeout.\n");
 419
 420                         strcat(linkmsg, "ANed: ");
 421                 }
 422
 423                 if (jme->phylink == phylink) {
 424                         rc = 1;
 425                         goto out;
 426                 }
 427                 if (testonly)
 428                         goto out;
 429
 430                 jme->phylink = phylink;
 431
 432                 ghc = jme->reg_ghc & ~(GHC_SPEED_10M |
 433                                         GHC_SPEED_100M |
 434                                         GHC_SPEED_1000M |
 435                                         GHC_DPX);
 436                 switch (phylink & PHY_LINK_SPEED_MASK) {
 437                 case PHY_LINK_SPEED_10M:
 438                         ghc |= GHC_SPEED_10M;
 439                         strcat(linkmsg, "10 Mbps, ");
 440                         break;
 441                 case PHY_LINK_SPEED_100M:
 442                         ghc |= GHC_SPEED_100M;
 443                         strcat(linkmsg, "100 Mbps, ");
 444                         break;
 445                 case PHY_LINK_SPEED_1000M:
 446                         ghc |= GHC_SPEED_1000M;
 447                         strcat(linkmsg, "1000 Mbps, ");
 448                         break;
 449                 default:
 450                         break;
 451                 }
 452
 453                 if (phylink & PHY_LINK_DUPLEX) {
 454                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
 455                         ghc |= GHC_DPX;
 456                 } else {
 457                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
 458                                                 TXMCS_BACKOFF |
 459                                                 TXMCS_CARRIERSENSE |
 460                                                 TXMCS_COLLISION);
 461                         jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN |
 462                                 ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) |
 463                                 TXTRHD_TXREN |
 464                                 ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL));
 465                 }
 466                 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
 467                                         "Full-Duplex, " :
 468                                         "Half-Duplex, ");
 469
 470                 if (phylink & PHY_LINK_MDI_STAT)
 471                         strcat(linkmsg, "MDI-X");
 472                 else
 473                         strcat(linkmsg, "MDI");
 474
 475                 gpreg1 = GPREG1_DEFAULT;
 476                 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
 477                         if (!(phylink & PHY_LINK_DUPLEX))
 478                                 gpreg1 |= GPREG1_HALFMODEPATCH;
 479                         switch (phylink & PHY_LINK_SPEED_MASK) {
 480                         case PHY_LINK_SPEED_10M:
 481                                 jme_set_phyfifoa(jme);
 482                                 gpreg1 |= GPREG1_RSSPATCH;
 483                                 break;
 484                         case PHY_LINK_SPEED_100M:
 485                                 jme_set_phyfifob(jme);
 486                                 gpreg1 |= GPREG1_RSSPATCH;
 487                                 break;
 488                         case PHY_LINK_SPEED_1000M:
 489                                 jme_set_phyfifoa(jme);
 490                                 break;
 491                         default:
 492                                 break;
 493                         }
 494                 }
 495                 jwrite32(jme, JME_GPREG1, gpreg1);
 496
 497                 jme->reg_ghc = ghc;
 498                 jwrite32(jme, JME_GHC, ghc);
 499
 500                 msg_link(jme, "Link is up at %s.\n", linkmsg);
 501                 netif_carrier_on(netdev);
 502         } else {
 503                 if (testonly)
 504                         goto out;
 505
 506                 msg_link(jme, "Link is down.\n");
 507                 jme->phylink = 0;
 508                 netif_carrier_off(netdev);
 509         }
 510
 511 out:
 512         return rc;
 513 }
 514
 515 static int
 516 jme_setup_tx_resources(struct jme_adapter *jme)
 517 {
 518         struct jme_ring *txring = &(jme->txring[0]);
 519
 520         txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
 521                                    TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 522                                    &(txring->dmaalloc),
 523                                    GFP_ATOMIC);
 524
 525         if (!txring->alloc) {
 526                 txring->desc = NULL;
 527                 txring->dmaalloc = 0;
 528                 txring->dma = 0;
 529                 return -ENOMEM;
 530         }
 531
 532         /*
 533          * 16 Bytes align
 534          */
 535         txring->desc            = (void *)ALIGN((unsigned long)(txring->alloc),
 536                                                 RING_DESC_ALIGN);
 537         txring->dma             = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
 538         txring->next_to_use     = 0;
 539         atomic_set(&txring->next_to_clean, 0);
 540         atomic_set(&txring->nr_free, jme->tx_ring_size);
 541
 542         /*
 543          * Initialize Transmit Descriptors
 544          */
 545         memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
 546         memset(txring->bufinf, 0,
 547                 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
 548
 549         return 0;
 550 }
 551
 552 static void
 553 jme_free_tx_resources(struct jme_adapter *jme)
 554 {
 555         int i;
 556         struct jme_ring *txring = &(jme->txring[0]);
 557         struct jme_buffer_info *txbi = txring->bufinf;
 558
 559         if (txring->alloc) {
 560                 for (i = 0 ; i < jme->tx_ring_size ; ++i) {
 561                         txbi = txring->bufinf + i;
 562                         if (txbi->skb) {
 563                                 dev_kfree_skb(txbi->skb);
 564                                 txbi->skb = NULL;
 565                         }
 566                         txbi->mapping           = 0;
 567                         txbi->len               = 0;
 568                         txbi->nr_desc           = 0;
 569                         txbi->start_xmit        = 0;
 570                 }
 571
 572                 dma_free_coherent(&(jme->pdev->dev),
 573                                   TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 574                                   txring->alloc,
 575                                   txring->dmaalloc);
 576
 577                 txring->alloc           = NULL;
 578                 txring->desc            = NULL;
 579                 txring->dmaalloc        = 0;
 580                 txring->dma             = 0;
 581         }
 582         txring->next_to_use     = 0;
 583         atomic_set(&txring->next_to_clean, 0);
 584         atomic_set(&txring->nr_free, 0);
 585
 586 }
 587
 588 static inline void
 589 jme_enable_tx_engine(struct jme_adapter *jme)
 590 {
 591         /*
 592          * Select Queue 0
 593          */
 594         jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
 595         wmb();
 596
 597         /*
 598          * Setup TX Queue 0 DMA Bass Address
 599          */
 600         jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
 601         jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
 602         jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
 603
 604         /*
 605          * Setup TX Descptor Count
 606          */
 607         jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
 608
 609         /*
 610          * Enable TX Engine
 611          */
 612         wmb();
 613         jwrite32(jme, JME_TXCS, jme->reg_txcs |
 614                                 TXCS_SELECT_QUEUE0 |
 615                                 TXCS_ENABLE);
 616
 617 }
 618
 619 static inline void
 620 jme_restart_tx_engine(struct jme_adapter *jme)
 621 {
 622         /*
 623          * Restart TX Engine
 624          */
 625         jwrite32(jme, JME_TXCS, jme->reg_txcs |
 626                                 TXCS_SELECT_QUEUE0 |
 627                                 TXCS_ENABLE);
 628 }
 629
 630 static inline void
 631 jme_disable_tx_engine(struct jme_adapter *jme)
 632 {
 633         int i;
 634         u32 val;
 635
 636         /*
 637          * Disable TX Engine
 638          */
 639         jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
 640         wmb();
 641
 642         val = jread32(jme, JME_TXCS);
 643         for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
 644                 mdelay(1);
 645                 val = jread32(jme, JME_TXCS);
 646                 rmb();
 647         }
 648
 649         if (!i)
 650                 jeprintk(jme->pdev, "Disable TX engine timeout.\n");
 651 }
 652
 653 static void
 654 jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
 655 {
 656         struct jme_ring *rxring = jme->rxring;
 657         register struct rxdesc *rxdesc = rxring->desc;
 658         struct jme_buffer_info *rxbi = rxring->bufinf;
 659         rxdesc += i;
 660         rxbi += i;
 661
 662         rxdesc->dw[0] = 0;
 663         rxdesc->dw[1] = 0;
 664         rxdesc->desc1.bufaddrh  = cpu_to_le32((__u64)rxbi->mapping >> 32);
 665         rxdesc->desc1.bufaddrl  = cpu_to_le32(
 666                                         (__u64)rxbi->mapping & 0xFFFFFFFFUL);
 667         rxdesc->desc1.datalen   = cpu_to_le16(rxbi->len);
 668         if (jme->dev->features & NETIF_F_HIGHDMA)
 669                 rxdesc->desc1.flags = RXFLAG_64BIT;
 670         wmb();
 671         rxdesc->desc1.flags     |= RXFLAG_OWN | RXFLAG_INT;
 672 }
 673
 674 static int
 675 jme_make_new_rx_buf(struct jme_adapter *jme, int i)
 676 {
 677         struct jme_ring *rxring = &(jme->rxring[0]);
 678         struct jme_buffer_info *rxbi = rxring->bufinf + i;
 679         struct sk_buff *skb;
 680
 681         skb = netdev_alloc_skb(jme->dev,
 682                 jme->dev->mtu + RX_EXTRA_LEN);
 683         if (unlikely(!skb))
 684                 return -ENOMEM;
 685
 686         rxbi->skb = skb;
 687         rxbi->len = skb_tailroom(skb);
 688         rxbi->mapping = pci_map_page(jme->pdev,
 689                                         virt_to_page(skb->data),
 690                                         offset_in_page(skb->data),
 691                                         rxbi->len,
 692                                         PCI_DMA_FROMDEVICE);
 693
 694         return 0;
 695 }
 696
 697 static void
 698 jme_free_rx_buf(struct jme_adapter *jme, int i)
 699 {
 700         struct jme_ring *rxring = &(jme->rxring[0]);
 701         struct jme_buffer_info *rxbi = rxring->bufinf;
 702         rxbi += i;
 703
 704         if (rxbi->skb) {
 705                 pci_unmap_page(jme->pdev,
 706                                  rxbi->mapping,
 707                                  rxbi->len,
 708                                  PCI_DMA_FROMDEVICE);
 709                 dev_kfree_skb(rxbi->skb);
 710                 rxbi->skb = NULL;
 711                 rxbi->mapping = 0;
 712                 rxbi->len = 0;
 713         }
 714 }
 715
 716 static void
 717 jme_free_rx_resources(struct jme_adapter *jme)
 718 {
 719         int i;
 720         struct jme_ring *rxring = &(jme->rxring[0]);
 721
 722         if (rxring->alloc) {
 723                 for (i = 0 ; i < jme->rx_ring_size ; ++i)
 724                         jme_free_rx_buf(jme, i);
 725
 726                 dma_free_coherent(&(jme->pdev->dev),
 727                                   RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 728                                   rxring->alloc,
 729                                   rxring->dmaalloc);
 730                 rxring->alloc    = NULL;
 731                 rxring->desc     = NULL;
 732                 rxring->dmaalloc = 0;
 733                 rxring->dma      = 0;
 734         }
 735         rxring->next_to_use   = 0;
 736         atomic_set(&rxring->next_to_clean, 0);
 737 }
 738
 739 static int
 740 jme_setup_rx_resources(struct jme_adapter *jme)
 741 {
 742         int i;
 743         struct jme_ring *rxring = &(jme->rxring[0]);
 744
 745         rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
 746                                    RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 747                                    &(rxring->dmaalloc),
 748                                    GFP_ATOMIC);
 749         if (!rxring->alloc) {
 750                 rxring->desc = NULL;
 751                 rxring->dmaalloc = 0;
 752                 rxring->dma = 0;
 753                 return -ENOMEM;
 754         }
 755
 756         /*
 757          * 16 Bytes align
 758          */
 759         rxring->desc            = (void *)ALIGN((unsigned long)(rxring->alloc),
 760                                                 RING_DESC_ALIGN);
 761         rxring->dma             = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
 762         rxring->next_to_use     = 0;
 763         atomic_set(&rxring->next_to_clean, 0);
 764
 765         /*
 766          * Initiallize Receive Descriptors
 767          */
 768         for (i = 0 ; i < jme->rx_ring_size ; ++i) {
 769                 if (unlikely(jme_make_new_rx_buf(jme, i))) {
 770                         jme_free_rx_resources(jme);
 771                         return -ENOMEM;
 772                 }
 773
 774                 jme_set_clean_rxdesc(jme, i);
 775         }
 776
 777         return 0;
 778 }
 779
 780 static inline void
 781 jme_enable_rx_engine(struct jme_adapter *jme)
 782 {
 783         /*
 784          * Select Queue 0
 785          */
 786         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 787                                 RXCS_QUEUESEL_Q0);
 788         wmb();
 789
 790         /*
 791          * Setup RX DMA Bass Address
 792          */
 793         jwrite32(jme, JME_RXDBA_LO, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL);
 794         jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
 795         jwrite32(jme, JME_RXNDA, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL);
 796
 797         /*
 798          * Setup RX Descriptor Count
 799          */
 800         jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
 801
 802         /*
 803          * Setup Unicast Filter
 804          */
 805         jme_set_multi(jme->dev);
 806
 807         /*
 808          * Enable RX Engine
 809          */
 810         wmb();
 811         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 812                                 RXCS_QUEUESEL_Q0 |
 813                                 RXCS_ENABLE |
 814                                 RXCS_QST);
 815 }
 816
 817 static inline void
 818 jme_restart_rx_engine(struct jme_adapter *jme)
 819 {
 820         /*
 821          * Start RX Engine
 822          */
 823         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 824                                 RXCS_QUEUESEL_Q0 |
 825                                 RXCS_ENABLE |
 826                                 RXCS_QST);
 827 }
 828
 829 static inline void
 830 jme_disable_rx_engine(struct jme_adapter *jme)
 831 {
 832         int i;
 833         u32 val;
 834
 835         /*
 836          * Disable RX Engine
 837          */
 838         jwrite32(jme, JME_RXCS, jme->reg_rxcs);
 839         wmb();
 840
 841         val = jread32(jme, JME_RXCS);
 842         for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
 843                 mdelay(1);
 844                 val = jread32(jme, JME_RXCS);
 845                 rmb();
 846         }
 847
 848         if (!i)
 849                 jeprintk(jme->pdev, "Disable RX engine timeout.\n");
 850
 851 }
 852
 853 static int
 854 jme_rxsum_ok(struct jme_adapter *jme, u16 flags)
 855 {
 856         if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
 857                 return false;
 858
 859         if (unlikely(!(flags & RXWBFLAG_MF) &&
 860         (flags & RXWBFLAG_TCPON) && !(flags & RXWBFLAG_TCPCS))) {
 861                 msg_rx_err(jme, "TCP Checksum error.\n");
 862                 goto out_sumerr;
 863         }
 864
 865         if (unlikely(!(flags & RXWBFLAG_MF) &&
 866         (flags & RXWBFLAG_UDPON) && !(flags & RXWBFLAG_UDPCS))) {
 867                 msg_rx_err(jme, "UDP Checksum error.\n");
 868                 goto out_sumerr;
 869         }
 870
 871         if (unlikely((flags & RXWBFLAG_IPV4) && !(flags & RXWBFLAG_IPCS))) {
 872                 msg_rx_err(jme, "IPv4 Checksum error.\n");
 873                 goto out_sumerr;
 874         }
 875
 876         return true;
 877
 878 out_sumerr:
 879         return false;
 880 }
 881
 882 static void
 883 jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
 884 {
 885         struct jme_ring *rxring = &(jme->rxring[0]);
 886         struct rxdesc *rxdesc = rxring->desc;
 887         struct jme_buffer_info *rxbi = rxring->bufinf;
 888         struct sk_buff *skb;
 889         int framesize;
 890
 891         rxdesc += idx;
 892         rxbi += idx;
 893
 894         skb = rxbi->skb;
 895         pci_dma_sync_single_for_cpu(jme->pdev,
 896                                         rxbi->mapping,
 897                                         rxbi->len,
 898                                         PCI_DMA_FROMDEVICE);
 899
 900         if (unlikely(jme_make_new_rx_buf(jme, idx))) {
 901                 pci_dma_sync_single_for_device(jme->pdev,
 902                                                 rxbi->mapping,
 903                                                 rxbi->len,
 904                                                 PCI_DMA_FROMDEVICE);
 905
 906                 ++(NET_STAT(jme).rx_dropped);
 907         } else {
 908                 framesize = le16_to_cpu(rxdesc->descwb.framesize)
 909                                 - RX_PREPAD_SIZE;
 910
 911                 skb_reserve(skb, RX_PREPAD_SIZE);
 912                 skb_put(skb, framesize);
 913                 skb->protocol = eth_type_trans(skb, jme->dev);
 914
 915                 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags)))
 916                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 917                 else
 918                         skb->ip_summed = CHECKSUM_NONE;
 919
 920                 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
 921                         if (jme->vlgrp) {
 922                                 jme->jme_vlan_rx(skb, jme->vlgrp,
 923                                         le16_to_cpu(rxdesc->descwb.vlan));
 924                                 NET_STAT(jme).rx_bytes += 4;
 925                         }
 926                 } else {
 927                         jme->jme_rx(skb);
 928                 }
 929
 930                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
 931                     cpu_to_le16(RXWBFLAG_DEST_MUL))
 932                         ++(NET_STAT(jme).multicast);
 933
 934                 NET_STAT(jme).rx_bytes += framesize;
 935                 ++(NET_STAT(jme).rx_packets);
 936         }
 937
 938         jme_set_clean_rxdesc(jme, idx);
 939
 940 }
 941
 942 static int
 943 jme_process_receive(struct jme_adapter *jme, int limit)
 944 {
 945         struct jme_ring *rxring = &(jme->rxring[0]);
 946         struct rxdesc *rxdesc = rxring->desc;
 947         int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
 948
 949         if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
 950                 goto out_inc;
 951
 952         if (unlikely(atomic_read(&jme->link_changing) != 1))
 953                 goto out_inc;
 954
 955         if (unlikely(!netif_carrier_ok(jme->dev)))
 956                 goto out_inc;
 957
 958         i = atomic_read(&rxring->next_to_clean);
 959         while (limit-- > 0) {
 960                 rxdesc = rxring->desc;
 961                 rxdesc += i;
 962
 963                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
 964                 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
 965                         goto out;
 966
 967                 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
 968
 969                 if (unlikely(desccnt > 1 ||
 970                 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
 971
 972                         if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
 973                                 ++(NET_STAT(jme).rx_crc_errors);
 974                         else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
 975                                 ++(NET_STAT(jme).rx_fifo_errors);
 976                         else
 977                                 ++(NET_STAT(jme).rx_errors);
 978
 979                         if (desccnt > 1)
 980                                 limit -= desccnt - 1;
 981
 982                         for (j = i, ccnt = desccnt ; ccnt-- ; ) {
 983                                 jme_set_clean_rxdesc(jme, j);
 984                                 j = (j + 1) & (mask);
 985                         }
 986
 987                 } else {
 988                         jme_alloc_and_feed_skb(jme, i);
 989                 }
 990
 991                 i = (i + desccnt) & (mask);
 992         }
 993
 994 out:
 995         atomic_set(&rxring->next_to_clean, i);
 996
 997 out_inc:
 998         atomic_inc(&jme->rx_cleaning);
 999
1000         return limit > 0 ? limit : 0;
1001
1002 }
1003
1004 static void
1005 jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1006 {
1007         if (likely(atmp == dpi->cur)) {
1008                 dpi->cnt = 0;
1009                 return;
1010         }
1011
1012         if (dpi->attempt == atmp) {
1013                 ++(dpi->cnt);
1014         } else {
1015                 dpi->attempt = atmp;
1016                 dpi->cnt = 0;
1017         }
1018
1019 }
1020
1021 static void
1022 jme_dynamic_pcc(struct jme_adapter *jme)
1023 {
1024         register struct dynpcc_info *dpi = &(jme->dpi);
1025
1026         if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1027                 jme_attempt_pcc(dpi, PCC_P3);
1028         else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD
1029         || dpi->intr_cnt > PCC_INTR_THRESHOLD)
1030                 jme_attempt_pcc(dpi, PCC_P2);
1031         else
1032                 jme_attempt_pcc(dpi, PCC_P1);
1033
1034         if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1035                 if (dpi->attempt < dpi->cur)
1036                         tasklet_schedule(&jme->rxclean_task);
1037                 jme_set_rx_pcc(jme, dpi->attempt);
1038                 dpi->cur = dpi->attempt;
1039                 dpi->cnt = 0;
1040         }
1041 }
1042
1043 static void
1044 jme_start_pcc_timer(struct jme_adapter *jme)
1045 {
1046         struct dynpcc_info *dpi = &(jme->dpi);
1047         dpi->last_bytes         = NET_STAT(jme).rx_bytes;
1048         dpi->last_pkts          = NET_STAT(jme).rx_packets;
1049         dpi->intr_cnt           = 0;
1050         jwrite32(jme, JME_TMCSR,
1051                 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1052 }
1053
1054 static inline void
1055 jme_stop_pcc_timer(struct jme_adapter *jme)
1056 {
1057         jwrite32(jme, JME_TMCSR, 0);
1058 }
1059
1060 static void
1061 jme_shutdown_nic(struct jme_adapter *jme)
1062 {
1063         u32 phylink;
1064
1065         phylink = jme_linkstat_from_phy(jme);
1066
1067         if (!(phylink & PHY_LINK_UP)) {
1068                 /*
1069                  * Disable all interrupt before issue timer
1070                  */
1071                 jme_stop_irq(jme);
1072                 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1073         }
1074 }
1075
1076 static void
1077 jme_pcc_tasklet(unsigned long arg)
1078 {
1079         struct jme_adapter *jme = (struct jme_adapter *)arg;
1080         struct net_device *netdev = jme->dev;
1081
1082         if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1083                 jme_shutdown_nic(jme);
1084                 return;
1085         }
1086
1087         if (unlikely(!netif_carrier_ok(netdev) ||
1088                 (atomic_read(&jme->link_changing) != 1)
1089         )) {
1090                 jme_stop_pcc_timer(jme);
1091                 return;
1092         }
1093
1094         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1095                 jme_dynamic_pcc(jme);
1096
1097         jme_start_pcc_timer(jme);
1098 }
1099
1100 static inline void
1101 jme_polling_mode(struct jme_adapter *jme)
1102 {
1103         jme_set_rx_pcc(jme, PCC_OFF);
1104 }
1105
1106 static inline void
1107 jme_interrupt_mode(struct jme_adapter *jme)
1108 {
1109         jme_set_rx_pcc(jme, PCC_P1);
1110 }
1111
1112 static inline int
1113 jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1114 {
1115         u32 apmc;
1116         apmc = jread32(jme, JME_APMC);
1117         return apmc & JME_APMC_PSEUDO_HP_EN;
1118 }
1119
1120 static void
1121 jme_start_shutdown_timer(struct jme_adapter *jme)
1122 {
1123         u32 apmc;
1124
1125         apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1126         apmc &= ~JME_APMC_EPIEN_CTRL;
1127         if (!no_extplug) {
1128                 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1129                 wmb();
1130         }
1131         jwrite32f(jme, JME_APMC, apmc);
1132
1133         jwrite32f(jme, JME_TIMER2, 0);
1134         set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1135         jwrite32(jme, JME_TMCSR,
1136                 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1137 }
1138
1139 static void
1140 jme_stop_shutdown_timer(struct jme_adapter *jme)
1141 {
1142         u32 apmc;
1143
1144         jwrite32f(jme, JME_TMCSR, 0);
1145         jwrite32f(jme, JME_TIMER2, 0);
1146         clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1147
1148         apmc = jread32(jme, JME_APMC);
1149         apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1150         jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1151         wmb();
1152         jwrite32f(jme, JME_APMC, apmc);
1153 }
1154
1155 static void
1156 jme_link_change_tasklet(unsigned long arg)
1157 {
1158         struct jme_adapter *jme = (struct jme_adapter *)arg;
1159         struct net_device *netdev = jme->dev;
1160         int rc;
1161
1162         while (!atomic_dec_and_test(&jme->link_changing)) {
1163                 atomic_inc(&jme->link_changing);
1164                 msg_intr(jme, "Get link change lock failed.\n");
1165                 while (atomic_read(&jme->link_changing) != 1)
1166                         msg_intr(jme, "Waiting link change lock.\n");
1167         }
1168
1169         if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1170                 goto out;
1171
1172         jme->old_mtu = netdev->mtu;
1173         netif_stop_queue(netdev);
1174         if (jme_pseudo_hotplug_enabled(jme))
1175                 jme_stop_shutdown_timer(jme);
1176
1177         jme_stop_pcc_timer(jme);
1178         tasklet_disable(&jme->txclean_task);
1179         tasklet_disable(&jme->rxclean_task);
1180         tasklet_disable(&jme->rxempty_task);
1181
1182         if (netif_carrier_ok(netdev)) {
1183                 jme_reset_ghc_speed(jme);
1184                 jme_disable_rx_engine(jme);
1185                 jme_disable_tx_engine(jme);
1186                 jme_reset_mac_processor(jme);
1187                 jme_free_rx_resources(jme);
1188                 jme_free_tx_resources(jme);
1189
1190                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1191                         jme_polling_mode(jme);
1192
1193                 netif_carrier_off(netdev);
1194         }
1195
1196         jme_check_link(netdev, 0);
1197         if (netif_carrier_ok(netdev)) {
1198                 rc = jme_setup_rx_resources(jme);
1199                 if (rc) {
1200                         jeprintk(jme->pdev, "Allocating resources for RX error"
1201                                 ", Device STOPPED!\n");
1202                         goto out_enable_tasklet;
1203                 }
1204
1205                 rc = jme_setup_tx_resources(jme);
1206                 if (rc) {
1207                         jeprintk(jme->pdev, "Allocating resources for TX error"
1208                                 ", Device STOPPED!\n");
1209                         goto err_out_free_rx_resources;
1210                 }
1211
1212                 jme_enable_rx_engine(jme);
1213                 jme_enable_tx_engine(jme);
1214
1215                 netif_start_queue(netdev);
1216
1217                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1218                         jme_interrupt_mode(jme);
1219
1220                 jme_start_pcc_timer(jme);
1221         } else if (jme_pseudo_hotplug_enabled(jme)) {
1222                 jme_start_shutdown_timer(jme);
1223         }
1224
1225         goto out_enable_tasklet;
1226
1227 err_out_free_rx_resources:
1228         jme_free_rx_resources(jme);
1229 out_enable_tasklet:
1230         tasklet_enable(&jme->txclean_task);
1231         tasklet_hi_enable(&jme->rxclean_task);
1232         tasklet_hi_enable(&jme->rxempty_task);
1233 out:
1234         atomic_inc(&jme->link_changing);
1235 }
1236
1237 static void
1238 jme_rx_clean_tasklet(unsigned long arg)
1239 {
1240         struct jme_adapter *jme = (struct jme_adapter *)arg;
1241         struct dynpcc_info *dpi = &(jme->dpi);
1242
1243         jme_process_receive(jme, jme->rx_ring_size);
1244         ++(dpi->intr_cnt);
1245
1246 }
1247
1248 static int
1249 jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1250 {
1251         struct jme_adapter *jme = jme_napi_priv(holder);
1252         struct net_device *netdev = jme->dev;
1253         int rest;
1254
1255         rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1256
1257         while (atomic_read(&jme->rx_empty) > 0) {
1258                 atomic_dec(&jme->rx_empty);
1259                 ++(NET_STAT(jme).rx_dropped);
1260                 jme_restart_rx_engine(jme);
1261         }
1262         atomic_inc(&jme->rx_empty);
1263
1264         if (rest) {
1265                 JME_RX_COMPLETE(netdev, holder);
1266                 jme_interrupt_mode(jme);
1267         }
1268
1269         JME_NAPI_WEIGHT_SET(budget, rest);
1270         return JME_NAPI_WEIGHT_VAL(budget) - rest;
1271 }
1272
1273 static void
1274 jme_rx_empty_tasklet(unsigned long arg)
1275 {
1276         struct jme_adapter *jme = (struct jme_adapter *)arg;
1277
1278         if (unlikely(atomic_read(&jme->link_changing) != 1))
1279                 return;
1280
1281         if (unlikely(!netif_carrier_ok(jme->dev)))
1282                 return;
1283
1284         msg_rx_status(jme, "RX Queue Full!\n");
1285
1286         jme_rx_clean_tasklet(arg);
1287
1288         while (atomic_read(&jme->rx_empty) > 0) {
1289                 atomic_dec(&jme->rx_empty);
1290                 ++(NET_STAT(jme).rx_dropped);
1291                 jme_restart_rx_engine(jme);
1292         }
1293         atomic_inc(&jme->rx_empty);
1294 }
1295
1296 static void
1297 jme_wake_queue_if_stopped(struct jme_adapter *jme)
1298 {
1299         struct jme_ring *txring = jme->txring;
1300
1301         smp_wmb();
1302         if (unlikely(netif_queue_stopped(jme->dev) &&
1303         atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1304                 msg_tx_done(jme, "TX Queue Waked.\n");
1305                 netif_wake_queue(jme->dev);
1306         }
1307
1308 }
1309
1310 static void
1311 jme_tx_clean_tasklet(unsigned long arg)
1312 {
1313         struct jme_adapter *jme = (struct jme_adapter *)arg;
1314         struct jme_ring *txring = &(jme->txring[0]);
1315         struct txdesc *txdesc = txring->desc;
1316         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1317         int i, j, cnt = 0, max, err, mask;
1318
1319         tx_dbg(jme, "Into txclean.\n");
1320
1321         if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1322                 goto out;
1323
1324         if (unlikely(atomic_read(&jme->link_changing) != 1))
1325                 goto out;
1326
1327         if (unlikely(!netif_carrier_ok(jme->dev)))
1328                 goto out;
1329
1330         max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1331         mask = jme->tx_ring_mask;
1332
1333         for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1334
1335                 ctxbi = txbi + i;
1336
1337                 if (likely(ctxbi->skb &&
1338                 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1339
1340                         tx_dbg(jme, "txclean: %d+%d@%lu\n",
1341                                         i, ctxbi->nr_desc, jiffies);
1342
1343                         err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1344
1345                         for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1346                                 ttxbi = txbi + ((i + j) & (mask));
1347                                 txdesc[(i + j) & (mask)].dw[0] = 0;
1348
1349                                 pci_unmap_page(jme->pdev,
1350                                                  ttxbi->mapping,
1351                                                  ttxbi->len,
1352                                                  PCI_DMA_TODEVICE);
1353
1354                                 ttxbi->mapping = 0;
1355                                 ttxbi->len = 0;
1356                         }
1357
1358                         dev_kfree_skb(ctxbi->skb);
1359
1360                         cnt += ctxbi->nr_desc;
1361
1362                         if (unlikely(err)) {
1363                                 ++(NET_STAT(jme).tx_carrier_errors);
1364                         } else {
1365                                 ++(NET_STAT(jme).tx_packets);
1366                                 NET_STAT(jme).tx_bytes += ctxbi->len;
1367                         }
1368
1369                         ctxbi->skb = NULL;
1370                         ctxbi->len = 0;
1371                         ctxbi->start_xmit = 0;
1372
1373                 } else {
1374                         break;
1375                 }
1376
1377                 i = (i + ctxbi->nr_desc) & mask;
1378
1379                 ctxbi->nr_desc = 0;
1380         }
1381
1382         tx_dbg(jme, "txclean: done %d@%lu.\n", i, jiffies);
1383         atomic_set(&txring->next_to_clean, i);
1384         atomic_add(cnt, &txring->nr_free);
1385
1386         jme_wake_queue_if_stopped(jme);
1387
1388 out:
1389         atomic_inc(&jme->tx_cleaning);
1390 }
1391
1392 static void
1393 jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1394 {
1395         /*
1396          * Disable interrupt
1397          */
1398         jwrite32f(jme, JME_IENC, INTR_ENABLE);
1399
1400         if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1401                 /*
1402                  * Link change event is critical
1403                  * all other events are ignored
1404                  */
1405                 jwrite32(jme, JME_IEVE, intrstat);
1406                 tasklet_schedule(&jme->linkch_task);
1407                 goto out_reenable;
1408         }
1409
1410         if (intrstat & INTR_TMINTR) {
1411                 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1412                 tasklet_schedule(&jme->pcc_task);
1413         }
1414
1415         if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1416                 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1417                 tasklet_schedule(&jme->txclean_task);
1418         }
1419
1420         if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1421                 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1422                                                      INTR_PCCRX0 |
1423                                                      INTR_RX0EMP)) |
1424                                         INTR_RX0);
1425         }
1426
1427         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1428                 if (intrstat & INTR_RX0EMP)
1429                         atomic_inc(&jme->rx_empty);
1430
1431                 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1432                         if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1433                                 jme_polling_mode(jme);
1434                                 JME_RX_SCHEDULE(jme);
1435                         }
1436                 }
1437         } else {
1438                 if (intrstat & INTR_RX0EMP) {
1439                         atomic_inc(&jme->rx_empty);
1440                         tasklet_hi_schedule(&jme->rxempty_task);
1441                 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1442                         tasklet_hi_schedule(&jme->rxclean_task);
1443                 }
1444         }
1445
1446 out_reenable:
1447         /*
1448          * Re-enable interrupt
1449          */
1450         jwrite32f(jme, JME_IENS, INTR_ENABLE);
1451 }
1452
1453 static irqreturn_t
1454 jme_intr(int irq, void *dev_id)
1455 {
1456         struct net_device *netdev = dev_id;
1457         struct jme_adapter *jme = netdev_priv(netdev);
1458         u32 intrstat;
1459
1460         intrstat = jread32(jme, JME_IEVE);
1461
1462         /*
1463          * Check if it's really an interrupt for us
1464          */
1465         if (unlikely((intrstat & INTR_ENABLE) == 0))
1466                 return IRQ_NONE;
1467
1468         /*
1469          * Check if the device still exist
1470          */
1471         if (unlikely(intrstat == ~((typeof(intrstat))0)))
1472                 return IRQ_NONE;
1473
1474         jme_intr_msi(jme, intrstat);
1475
1476         return IRQ_HANDLED;
1477 }
1478
1479 static irqreturn_t
1480 jme_msi(int irq, void *dev_id)
1481 {
1482         struct net_device *netdev = dev_id;
1483         struct jme_adapter *jme = netdev_priv(netdev);
1484         u32 intrstat;
1485
1486         pci_dma_sync_single_for_cpu(jme->pdev,
1487                                     jme->shadow_dma,
1488                                     sizeof(u32) * SHADOW_REG_NR,
1489                                     PCI_DMA_FROMDEVICE);
1490         intrstat = jme->shadow_regs[SHADOW_IEVE];
1491         jme->shadow_regs[SHADOW_IEVE] = 0;
1492
1493         jme_intr_msi(jme, intrstat);
1494
1495         return IRQ_HANDLED;
1496 }
1497
1498 static void
1499 jme_reset_link(struct jme_adapter *jme)
1500 {
1501         jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1502 }
1503
1504 static void
1505 jme_restart_an(struct jme_adapter *jme)
1506 {
1507         u32 bmcr;
1508
1509         spin_lock_bh(&jme->phy_lock);
1510         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1511         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1512         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1513         spin_unlock_bh(&jme->phy_lock);
1514 }
1515
1516 static int
1517 jme_request_irq(struct jme_adapter *jme)
1518 {
1519         int rc;
1520         struct net_device *netdev = jme->dev;
1521         irq_handler_t handler = jme_intr;
1522         int irq_flags = IRQF_SHARED;
1523
1524         if (!pci_enable_msi(jme->pdev)) {
1525                 set_bit(JME_FLAG_MSI, &jme->flags);
1526                 handler = jme_msi;
1527                 irq_flags = 0;
1528         }
1529
1530         rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1531                           netdev);
1532         if (rc) {
1533                 jeprintk(jme->pdev,
1534                         "Unable to request %s interrupt (return: %d)\n",
1535                         test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1536                         rc);
1537
1538                 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1539                         pci_disable_msi(jme->pdev);
1540                         clear_bit(JME_FLAG_MSI, &jme->flags);
1541                 }
1542         } else {
1543                 netdev->irq = jme->pdev->irq;
1544         }
1545
1546         return rc;
1547 }
1548
1549 static void
1550 jme_free_irq(struct jme_adapter *jme)
1551 {
1552         free_irq(jme->pdev->irq, jme->dev);
1553         if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1554                 pci_disable_msi(jme->pdev);
1555                 clear_bit(JME_FLAG_MSI, &jme->flags);
1556                 jme->dev->irq = jme->pdev->irq;
1557         }
1558 }
1559
1560 static int
1561 jme_open(struct net_device *netdev)
1562 {
1563         struct jme_adapter *jme = netdev_priv(netdev);
1564         int rc;
1565
1566         jme_clear_pm(jme);
1567         JME_NAPI_ENABLE(jme);
1568
1569         tasklet_enable(&jme->txclean_task);
1570         tasklet_hi_enable(&jme->rxclean_task);
1571         tasklet_hi_enable(&jme->rxempty_task);
1572
1573         rc = jme_request_irq(jme);
1574         if (rc)
1575                 goto err_out;
1576
1577         jme_enable_shadow(jme);
1578         jme_start_irq(jme);
1579
1580         if (test_bit(JME_FLAG_SSET, &jme->flags))
1581                 jme_set_settings(netdev, &jme->old_ecmd);
1582         else
1583                 jme_reset_phy_processor(jme);
1584
1585         jme_reset_link(jme);
1586
1587         return 0;
1588
1589 err_out:
1590         netif_stop_queue(netdev);
1591         netif_carrier_off(netdev);
1592         return rc;
1593 }
1594
1595 #ifdef CONFIG_PM
1596 static void
1597 jme_set_100m_half(struct jme_adapter *jme)
1598 {
1599         u32 bmcr, tmp;
1600
1601         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1602         tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1603                        BMCR_SPEED1000 | BMCR_FULLDPLX);
1604         tmp |= BMCR_SPEED100;
1605
1606         if (bmcr != tmp)
1607                 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1608
1609         if (jme->fpgaver)
1610                 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1611         else
1612                 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1613 }
1614
1615 #define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1616 static void
1617 jme_wait_link(struct jme_adapter *jme)
1618 {
1619         u32 phylink, to = JME_WAIT_LINK_TIME;
1620
1621         mdelay(1000);
1622         phylink = jme_linkstat_from_phy(jme);
1623         while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1624                 mdelay(10);
1625                 phylink = jme_linkstat_from_phy(jme);
1626         }
1627 }
1628 #endif
1629
1630 static inline void
1631 jme_phy_off(struct jme_adapter *jme)
1632 {
1633         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
1634 }
1635
1636 static int
1637 jme_close(struct net_device *netdev)
1638 {
1639         struct jme_adapter *jme = netdev_priv(netdev);
1640
1641         netif_stop_queue(netdev);
1642         netif_carrier_off(netdev);
1643
1644         jme_stop_irq(jme);
1645         jme_disable_shadow(jme);
1646         jme_free_irq(jme);
1647
1648         JME_NAPI_DISABLE(jme);
1649
1650         tasklet_kill(&jme->linkch_task);
1651         tasklet_kill(&jme->txclean_task);
1652         tasklet_kill(&jme->rxclean_task);
1653         tasklet_kill(&jme->rxempty_task);
1654
1655         jme_reset_ghc_speed(jme);
1656         jme_disable_rx_engine(jme);
1657         jme_disable_tx_engine(jme);
1658         jme_reset_mac_processor(jme);
1659         jme_free_rx_resources(jme);
1660         jme_free_tx_resources(jme);
1661         jme->phylink = 0;
1662         jme_phy_off(jme);
1663
1664         return 0;
1665 }
1666
1667 static int
1668 jme_alloc_txdesc(struct jme_adapter *jme,
1669                         struct sk_buff *skb)
1670 {
1671         struct jme_ring *txring = jme->txring;
1672         int idx, nr_alloc, mask = jme->tx_ring_mask;
1673
1674         idx = txring->next_to_use;
1675         nr_alloc = skb_shinfo(skb)->nr_frags + 2;
1676
1677         if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
1678                 return -1;
1679
1680         atomic_sub(nr_alloc, &txring->nr_free);
1681
1682         txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
1683
1684         return idx;
1685 }
1686
1687 static void
1688 jme_fill_tx_map(struct pci_dev *pdev,
1689                 struct txdesc *txdesc,
1690                 struct jme_buffer_info *txbi,
1691                 struct page *page,
1692                 u32 page_offset,
1693                 u32 len,
1694                 u8 hidma)
1695 {
1696         dma_addr_t dmaaddr;
1697
1698         dmaaddr = pci_map_page(pdev,
1699                                 page,
1700                                 page_offset,
1701                                 len,
1702                                 PCI_DMA_TODEVICE);
1703
1704         pci_dma_sync_single_for_device(pdev,
1705                                        dmaaddr,
1706                                        len,
1707                                        PCI_DMA_TODEVICE);
1708
1709         txdesc->dw[0] = 0;
1710         txdesc->dw[1] = 0;
1711         txdesc->desc2.flags     = TXFLAG_OWN;
1712         txdesc->desc2.flags     |= (hidma) ? TXFLAG_64BIT : 0;
1713         txdesc->desc2.datalen   = cpu_to_le16(len);
1714         txdesc->desc2.bufaddrh  = cpu_to_le32((__u64)dmaaddr >> 32);
1715         txdesc->desc2.bufaddrl  = cpu_to_le32(
1716                                         (__u64)dmaaddr & 0xFFFFFFFFUL);
1717
1718         txbi->mapping = dmaaddr;
1719         txbi->len = len;
1720 }
1721
1722 static void
1723 jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1724 {
1725         struct jme_ring *txring = jme->txring;
1726         struct txdesc *txdesc = txring->desc, *ctxdesc;
1727         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
1728         u8 hidma = jme->dev->features & NETIF_F_HIGHDMA;
1729         int i, nr_frags = skb_shinfo(skb)->nr_frags;
1730         int mask = jme->tx_ring_mask;
1731         struct skb_frag_struct *frag;
1732         u32 len;
1733
1734         for (i = 0 ; i < nr_frags ; ++i) {
1735                 frag = &skb_shinfo(skb)->frags[i];
1736                 ctxdesc = txdesc + ((idx + i + 2) & (mask));
1737                 ctxbi = txbi + ((idx + i + 2) & (mask));
1738
1739                 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page,
1740                                  frag->page_offset, frag->size, hidma);
1741         }
1742
1743         len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
1744         ctxdesc = txdesc + ((idx + 1) & (mask));
1745         ctxbi = txbi + ((idx + 1) & (mask));
1746         jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
1747                         offset_in_page(skb->data), len, hidma);
1748
1749 }
1750
1751 static int
1752 jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
1753 {
1754         if (unlikely(skb_shinfo(skb)->gso_size &&
1755                         skb_header_cloned(skb) &&
1756                         pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
1757                 dev_kfree_skb(skb);
1758                 return -1;
1759         }
1760
1761         return 0;
1762 }
1763
1764 static int
1765 jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
1766 {
1767         *mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
1768         if (*mss) {
1769                 *flags |= TXFLAG_LSEN;
1770
1771                 if (skb->protocol == htons(ETH_P_IP)) {
1772                         struct iphdr *iph = ip_hdr(skb);
1773
1774                         iph->check = 0;
1775                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1776                                                                 iph->daddr, 0,
1777                                                                 IPPROTO_TCP,
1778                                                                 0);
1779                 } else {
1780                         struct ipv6hdr *ip6h = ipv6_hdr(skb);
1781
1782                         tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr,
1783                                                                 &ip6h->daddr, 0,
1784                                                                 IPPROTO_TCP,
1785                                                                 0);
1786                 }
1787
1788                 return 0;
1789         }
1790
1791         return 1;
1792 }
1793
1794 static void
1795 jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
1796 {
1797         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1798                 u8 ip_proto;
1799
1800                 switch (skb->protocol) {
1801                 case htons(ETH_P_IP):
1802                         ip_proto = ip_hdr(skb)->protocol;
1803                         break;
1804                 case htons(ETH_P_IPV6):
1805                         ip_proto = ipv6_hdr(skb)->nexthdr;
1806                         break;
1807                 default:
1808                         ip_proto = 0;
1809                         break;
1810                 }
1811
1812                 switch (ip_proto) {
1813                 case IPPROTO_TCP:
1814                         *flags |= TXFLAG_TCPCS;
1815                         break;
1816                 case IPPROTO_UDP:
1817                         *flags |= TXFLAG_UDPCS;
1818                         break;
1819                 default:
1820                         msg_tx_err(jme, "Error upper layer protocol.\n");
1821                         break;
1822                 }
1823         }
1824 }
1825
1826 static inline void
1827 jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
1828 {
1829         if (vlan_tx_tag_present(skb)) {
1830                 *flags |= TXFLAG_TAGON;
1831                 *vlan = cpu_to_le16(vlan_tx_tag_get(skb));
1832         }
1833 }
1834
1835 static int
1836 jme_fill_first_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1837 {
1838         struct jme_ring *txring = jme->txring;
1839         struct txdesc *txdesc;
1840         struct jme_buffer_info *txbi;
1841         u8 flags;
1842
1843         txdesc = (struct txdesc *)txring->desc + idx;
1844         txbi = txring->bufinf + idx;
1845
1846         txdesc->dw[0] = 0;
1847         txdesc->dw[1] = 0;
1848         txdesc->dw[2] = 0;
1849         txdesc->dw[3] = 0;
1850         txdesc->desc1.pktsize = cpu_to_le16(skb->len);
1851         /*
1852          * Set OWN bit at final.
1853          * When kernel transmit faster than NIC.
1854          * And NIC trying to send this descriptor before we tell
1855          * it to start sending this TX queue.
1856          * Other fields are already filled correctly.
1857          */
1858         wmb();
1859         flags = TXFLAG_OWN | TXFLAG_INT;
1860         /*
1861          * Set checksum flags while not tso
1862          */
1863         if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
1864                 jme_tx_csum(jme, skb, &flags);
1865         jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
1866         txdesc->desc1.flags = flags;
1867         /*
1868          * Set tx buffer info after telling NIC to send
1869          * For better tx_clean timing
1870          */
1871         wmb();
1872         txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
1873         txbi->skb = skb;
1874         txbi->len = skb->len;
1875         txbi->start_xmit = jiffies;
1876         if (!txbi->start_xmit)
1877                 txbi->start_xmit = (0UL-1);
1878
1879         return 0;
1880 }
1881
1882 static void
1883 jme_stop_queue_if_full(struct jme_adapter *jme)
1884 {
1885         struct jme_ring *txring = jme->txring;
1886         struct jme_buffer_info *txbi = txring->bufinf;
1887         int idx = atomic_read(&txring->next_to_clean);
1888
1889         txbi += idx;
1890
1891         smp_wmb();
1892         if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
1893                 netif_stop_queue(jme->dev);
1894                 msg_tx_queued(jme, "TX Queue Paused.\n");
1895                 smp_wmb();
1896                 if (atomic_read(&txring->nr_free)
1897                         >= (jme->tx_wake_threshold)) {
1898                         netif_wake_queue(jme->dev);
1899                         msg_tx_queued(jme, "TX Queue Fast Waked.\n");
1900                 }
1901         }
1902
1903         if (unlikely(txbi->start_xmit &&
1904                         (jiffies - txbi->start_xmit) >= TX_TIMEOUT &&
1905                         txbi->skb)) {
1906                 netif_stop_queue(jme->dev);
1907                 msg_tx_queued(jme, "TX Queue Stopped %d@%lu.\n", idx, jiffies);
1908         }
1909 }
1910
1911 /*
1912  * This function is already protected by netif_tx_lock()
1913  */
1914
1915 static int
1916 jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
1917 {
1918         struct jme_adapter *jme = netdev_priv(netdev);
1919         int idx;
1920
1921         if (unlikely(jme_expand_header(jme, skb))) {
1922                 ++(NET_STAT(jme).tx_dropped);
1923                 return NETDEV_TX_OK;
1924         }
1925
1926         idx = jme_alloc_txdesc(jme, skb);
1927
1928         if (unlikely(idx < 0)) {
1929                 netif_stop_queue(netdev);
1930                 msg_tx_err(jme, "BUG! Tx ring full when queue awake!\n");
1931
1932                 return NETDEV_TX_BUSY;
1933         }
1934
1935         jme_map_tx_skb(jme, skb, idx);
1936         jme_fill_first_tx_desc(jme, skb, idx);
1937
1938         jwrite32(jme, JME_TXCS, jme->reg_txcs |
1939                                 TXCS_SELECT_QUEUE0 |
1940                                 TXCS_QUEUE0S |
1941                                 TXCS_ENABLE);
1942         netdev->trans_start = jiffies;
1943
1944         tx_dbg(jme, "xmit: %d+%d@%lu\n", idx,
1945                         skb_shinfo(skb)->nr_frags + 2,
1946                         jiffies);
1947         jme_stop_queue_if_full(jme);
1948
1949         return NETDEV_TX_OK;
1950 }
1951
1952 static int
1953 jme_set_macaddr(struct net_device *netdev, void *p)
1954 {
1955         struct jme_adapter *jme = netdev_priv(netdev);
1956         struct sockaddr *addr = p;
1957         u32 val;
1958
1959         if (netif_running(netdev))
1960                 return -EBUSY;
1961
1962         spin_lock_bh(&jme->macaddr_lock);
1963         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1964
1965         val = (addr->sa_data[3] & 0xff) << 24 |
1966               (addr->sa_data[2] & 0xff) << 16 |
1967               (addr->sa_data[1] & 0xff) <<  8 |
1968               (addr->sa_data[0] & 0xff);
1969         jwrite32(jme, JME_RXUMA_LO, val);
1970         val = (addr->sa_data[5] & 0xff) << 8 |
1971               (addr->sa_data[4] & 0xff);
1972         jwrite32(jme, JME_RXUMA_HI, val);
1973         spin_unlock_bh(&jme->macaddr_lock);
1974
1975         return 0;
1976 }
1977
1978 static void
1979 jme_set_multi(struct net_device *netdev)
1980 {
1981         struct jme_adapter *jme = netdev_priv(netdev);
1982         u32 mc_hash[2] = {};
1983         int i;
1984
1985         spin_lock_bh(&jme->rxmcs_lock);
1986
1987         jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
1988
1989         if (netdev->flags & IFF_PROMISC) {
1990                 jme->reg_rxmcs |= RXMCS_ALLFRAME;
1991         } else if (netdev->flags & IFF_ALLMULTI) {
1992                 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
1993         } else if (netdev->flags & IFF_MULTICAST) {
1994                 struct dev_mc_list *mclist;
1995                 int bit_nr;
1996
1997                 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
1998                 for (i = 0, mclist = netdev->mc_list;
1999                         mclist && i < netdev->mc_count;
2000                         ++i, mclist = mclist->next) {
2001
2002                         bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3F;
2003                         mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
2004                 }
2005
2006                 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
2007                 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
2008         }
2009
2010         wmb();
2011         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2012
2013         spin_unlock_bh(&jme->rxmcs_lock);
2014 }
2015
2016 static int
2017 jme_change_mtu(struct net_device *netdev, int new_mtu)
2018 {
2019         struct jme_adapter *jme = netdev_priv(netdev);
2020
2021         if (new_mtu == jme->old_mtu)
2022                 return 0;
2023
2024         if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
2025                 ((new_mtu) < IPV6_MIN_MTU))
2026                 return -EINVAL;
2027
2028         if (new_mtu > 4000) {
2029                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2030                 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
2031                 jme_restart_rx_engine(jme);
2032         } else {
2033                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2034                 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
2035                 jme_restart_rx_engine(jme);
2036         }
2037
2038         if (new_mtu > 1900) {
2039                 netdev->features &= ~(NETIF_F_HW_CSUM |
2040                                 NETIF_F_TSO |
2041                                 NETIF_F_TSO6);
2042         } else {
2043                 if (test_bit(JME_FLAG_TXCSUM, &jme->flags))
2044                         netdev->features |= NETIF_F_HW_CSUM;
2045                 if (test_bit(JME_FLAG_TSO, &jme->flags))
2046                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2047         }
2048
2049         netdev->mtu = new_mtu;
2050         jme_reset_link(jme);
2051
2052         return 0;
2053 }
2054
2055 static void
2056 jme_tx_timeout(struct net_device *netdev)
2057 {
2058         struct jme_adapter *jme = netdev_priv(netdev);
2059
2060         jme->phylink = 0;
2061         jme_reset_phy_processor(jme);
2062         if (test_bit(JME_FLAG_SSET, &jme->flags))
2063                 jme_set_settings(netdev, &jme->old_ecmd);
2064
2065         /*
2066          * Force to Reset the link again
2067          */
2068         jme_reset_link(jme);
2069 }
2070
2071 static void
2072 jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2073 {
2074         struct jme_adapter *jme = netdev_priv(netdev);
2075
2076         jme->vlgrp = grp;
2077 }
2078
2079 static void
2080 jme_get_drvinfo(struct net_device *netdev,
2081                      struct ethtool_drvinfo *info)
2082 {
2083         struct jme_adapter *jme = netdev_priv(netdev);
2084
2085         strcpy(info->driver, DRV_NAME);
2086         strcpy(info->version, DRV_VERSION);
2087         strcpy(info->bus_info, pci_name(jme->pdev));
2088 }
2089
2090 static int
2091 jme_get_regs_len(struct net_device *netdev)
2092 {
2093         return JME_REG_LEN;
2094 }
2095
2096 static void
2097 mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2098 {
2099         int i;
2100
2101         for (i = 0 ; i < len ; i += 4)
2102                 p[i >> 2] = jread32(jme, reg + i);
2103 }
2104
2105 static void
2106 mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2107 {
2108         int i;
2109         u16 *p16 = (u16 *)p;
2110
2111         for (i = 0 ; i < reg_nr ; ++i)
2112                 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2113 }
2114
2115 static void
2116 jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2117 {
2118         struct jme_adapter *jme = netdev_priv(netdev);
2119         u32 *p32 = (u32 *)p;
2120
2121         memset(p, 0xFF, JME_REG_LEN);
2122
2123         regs->version = 1;
2124         mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2125
2126         p32 += 0x100 >> 2;
2127         mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2128
2129         p32 += 0x100 >> 2;
2130         mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2131
2132         p32 += 0x100 >> 2;
2133         mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2134
2135         p32 += 0x100 >> 2;
2136         mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2137 }
2138
2139 static int
2140 jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2141 {
2142         struct jme_adapter *jme = netdev_priv(netdev);
2143
2144         ecmd->tx_coalesce_usecs = PCC_TX_TO;
2145         ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2146
2147         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2148                 ecmd->use_adaptive_rx_coalesce = false;
2149                 ecmd->rx_coalesce_usecs = 0;
2150                 ecmd->rx_max_coalesced_frames = 0;
2151                 return 0;
2152         }
2153
2154         ecmd->use_adaptive_rx_coalesce = true;
2155
2156         switch (jme->dpi.cur) {
2157         case PCC_P1:
2158                 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2159                 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2160                 break;
2161         case PCC_P2:
2162                 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2163                 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2164                 break;
2165         case PCC_P3:
2166                 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2167                 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2168                 break;
2169         default:
2170                 break;
2171         }
2172
2173         return 0;
2174 }
2175
2176 static int
2177 jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2178 {
2179         struct jme_adapter *jme = netdev_priv(netdev);
2180         struct dynpcc_info *dpi = &(jme->dpi);
2181
2182         if (netif_running(netdev))
2183                 return -EBUSY;
2184
2185         if (ecmd->use_adaptive_rx_coalesce
2186         && test_bit(JME_FLAG_POLL, &jme->flags)) {
2187                 clear_bit(JME_FLAG_POLL, &jme->flags);
2188                 jme->jme_rx = netif_rx;
2189                 jme->jme_vlan_rx = vlan_hwaccel_rx;
2190                 dpi->cur                = PCC_P1;
2191                 dpi->attempt            = PCC_P1;
2192                 dpi->cnt                = 0;
2193                 jme_set_rx_pcc(jme, PCC_P1);
2194                 jme_interrupt_mode(jme);
2195         } else if (!(ecmd->use_adaptive_rx_coalesce)
2196         && !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2197                 set_bit(JME_FLAG_POLL, &jme->flags);
2198                 jme->jme_rx = netif_receive_skb;
2199                 jme->jme_vlan_rx = vlan_hwaccel_receive_skb;
2200                 jme_interrupt_mode(jme);
2201         }
2202
2203         return 0;
2204 }
2205
2206 static void
2207 jme_get_pauseparam(struct net_device *netdev,
2208                         struct ethtool_pauseparam *ecmd)
2209 {
2210         struct jme_adapter *jme = netdev_priv(netdev);
2211         u32 val;
2212
2213         ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2214         ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2215
2216         spin_lock_bh(&jme->phy_lock);
2217         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2218         spin_unlock_bh(&jme->phy_lock);
2219
2220         ecmd->autoneg =
2221                 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2222 }
2223
2224 static int
2225 jme_set_pauseparam(struct net_device *netdev,
2226                         struct ethtool_pauseparam *ecmd)
2227 {
2228         struct jme_adapter *jme = netdev_priv(netdev);
2229         u32 val;
2230
2231         if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2232                 (ecmd->tx_pause != 0)) {
2233
2234                 if (ecmd->tx_pause)
2235                         jme->reg_txpfc |= TXPFC_PF_EN;
2236                 else
2237                         jme->reg_txpfc &= ~TXPFC_PF_EN;
2238
2239                 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2240         }
2241
2242         spin_lock_bh(&jme->rxmcs_lock);
2243         if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2244                 (ecmd->rx_pause != 0)) {
2245
2246                 if (ecmd->rx_pause)
2247                         jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2248                 else
2249                         jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2250
2251                 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2252         }
2253         spin_unlock_bh(&jme->rxmcs_lock);
2254
2255         spin_lock_bh(&jme->phy_lock);
2256         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2257         if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2258                 (ecmd->autoneg != 0)) {
2259
2260                 if (ecmd->autoneg)
2261                         val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2262                 else
2263                         val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2264
2265                 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2266                                 MII_ADVERTISE, val);
2267         }
2268         spin_unlock_bh(&jme->phy_lock);
2269
2270         return 0;
2271 }
2272
2273 static void
2274 jme_get_wol(struct net_device *netdev,
2275                 struct ethtool_wolinfo *wol)
2276 {
2277         struct jme_adapter *jme = netdev_priv(netdev);
2278
2279         wol->supported = WAKE_MAGIC | WAKE_PHY;
2280
2281         wol->wolopts = 0;
2282
2283         if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2284                 wol->wolopts |= WAKE_PHY;
2285
2286         if (jme->reg_pmcs & PMCS_MFEN)
2287                 wol->wolopts |= WAKE_MAGIC;
2288
2289 }
2290
2291 static int
2292 jme_set_wol(struct net_device *netdev,
2293                 struct ethtool_wolinfo *wol)
2294 {
2295         struct jme_adapter *jme = netdev_priv(netdev);
2296
2297         if (wol->wolopts & (WAKE_MAGICSECURE |
2298                                 WAKE_UCAST |
2299                                 WAKE_MCAST |
2300                                 WAKE_BCAST |
2301                                 WAKE_ARP))
2302                 return -EOPNOTSUPP;
2303
2304         jme->reg_pmcs = 0;
2305
2306         if (wol->wolopts & WAKE_PHY)
2307                 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2308
2309         if (wol->wolopts & WAKE_MAGIC)
2310                 jme->reg_pmcs |= PMCS_MFEN;
2311
2312         jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2313
2314         return 0;
2315 }
2316
2317 static int
2318 jme_get_settings(struct net_device *netdev,
2319                      struct ethtool_cmd *ecmd)
2320 {
2321         struct jme_adapter *jme = netdev_priv(netdev);
2322         int rc;
2323
2324         spin_lock_bh(&jme->phy_lock);
2325         rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2326         spin_unlock_bh(&jme->phy_lock);
2327         return rc;
2328 }
2329
2330 static int
2331 jme_set_settings(struct net_device *netdev,
2332                      struct ethtool_cmd *ecmd)
2333 {
2334         struct jme_adapter *jme = netdev_priv(netdev);
2335         int rc, fdc = 0;
2336
2337         if (ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE)
2338                 return -EINVAL;
2339
2340         if (jme->mii_if.force_media &&
2341         ecmd->autoneg != AUTONEG_ENABLE &&
2342         (jme->mii_if.full_duplex != ecmd->duplex))
2343                 fdc = 1;
2344
2345         spin_lock_bh(&jme->phy_lock);
2346         rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2347         spin_unlock_bh(&jme->phy_lock);
2348
2349         if (!rc && fdc)
2350                 jme_reset_link(jme);
2351
2352         if (!rc) {
2353                 set_bit(JME_FLAG_SSET, &jme->flags);
2354                 jme->old_ecmd = *ecmd;
2355         }
2356
2357         return rc;
2358 }
2359
2360 static u32
2361 jme_get_link(struct net_device *netdev)
2362 {
2363         struct jme_adapter *jme = netdev_priv(netdev);
2364         return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2365 }
2366
2367 static u32
2368 jme_get_msglevel(struct net_device *netdev)
2369 {
2370         struct jme_adapter *jme = netdev_priv(netdev);
2371         return jme->msg_enable;
2372 }
2373
2374 static void
2375 jme_set_msglevel(struct net_device *netdev, u32 value)
2376 {
2377         struct jme_adapter *jme = netdev_priv(netdev);
2378         jme->msg_enable = value;
2379 }
2380
2381 static u32
2382 jme_get_rx_csum(struct net_device *netdev)
2383 {
2384         struct jme_adapter *jme = netdev_priv(netdev);
2385         return jme->reg_rxmcs & RXMCS_CHECKSUM;
2386 }
2387
2388 static int
2389 jme_set_rx_csum(struct net_device *netdev, u32 on)
2390 {
2391         struct jme_adapter *jme = netdev_priv(netdev);
2392
2393         spin_lock_bh(&jme->rxmcs_lock);
2394         if (on)
2395                 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2396         else
2397                 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2398         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2399         spin_unlock_bh(&jme->rxmcs_lock);
2400
2401         return 0;
2402 }
2403
2404 static int
2405 jme_set_tx_csum(struct net_device *netdev, u32 on)
2406 {
2407         struct jme_adapter *jme = netdev_priv(netdev);
2408
2409         if (on) {
2410                 set_bit(JME_FLAG_TXCSUM, &jme->flags);
2411                 if (netdev->mtu <= 1900)
2412                         netdev->features |= NETIF_F_HW_CSUM;
2413         } else {
2414                 clear_bit(JME_FLAG_TXCSUM, &jme->flags);
2415                 netdev->features &= ~NETIF_F_HW_CSUM;
2416         }
2417
2418         return 0;
2419 }
2420
2421 static int
2422 jme_set_tso(struct net_device *netdev, u32 on)
2423 {
2424         struct jme_adapter *jme = netdev_priv(netdev);
2425
2426         if (on) {
2427                 set_bit(JME_FLAG_TSO, &jme->flags);
2428                 if (netdev->mtu <= 1900)
2429                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2430         } else {
2431                 clear_bit(JME_FLAG_TSO, &jme->flags);
2432                 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
2433         }
2434
2435         return 0;
2436 }
2437
2438 static int
2439 jme_nway_reset(struct net_device *netdev)
2440 {
2441         struct jme_adapter *jme = netdev_priv(netdev);
2442         jme_restart_an(jme);
2443         return 0;
2444 }
2445
2446 static u8
2447 jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2448 {
2449         u32 val;
2450         int to;
2451
2452         val = jread32(jme, JME_SMBCSR);
2453         to = JME_SMB_BUSY_TIMEOUT;
2454         while ((val & SMBCSR_BUSY) && --to) {
2455                 msleep(1);
2456                 val = jread32(jme, JME_SMBCSR);
2457         }
2458         if (!to) {
2459                 msg_hw(jme, "SMB Bus Busy.\n");
2460                 return 0xFF;
2461         }
2462
2463         jwrite32(jme, JME_SMBINTF,
2464                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2465                 SMBINTF_HWRWN_READ |
2466                 SMBINTF_HWCMD);
2467
2468         val = jread32(jme, JME_SMBINTF);
2469         to = JME_SMB_BUSY_TIMEOUT;
2470         while ((val & SMBINTF_HWCMD) && --to) {
2471                 msleep(1);
2472                 val = jread32(jme, JME_SMBINTF);
2473         }
2474         if (!to) {
2475                 msg_hw(jme, "SMB Bus Busy.\n");
2476                 return 0xFF;
2477         }
2478
2479         return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2480 }
2481
2482 static void
2483 jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2484 {
2485         u32 val;
2486         int to;
2487
2488         val = jread32(jme, JME_SMBCSR);
2489         to = JME_SMB_BUSY_TIMEOUT;
2490         while ((val & SMBCSR_BUSY) && --to) {
2491                 msleep(1);
2492                 val = jread32(jme, JME_SMBCSR);
2493         }
2494         if (!to) {
2495                 msg_hw(jme, "SMB Bus Busy.\n");
2496                 return;
2497         }
2498
2499         jwrite32(jme, JME_SMBINTF,
2500                 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2501                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2502                 SMBINTF_HWRWN_WRITE |
2503                 SMBINTF_HWCMD);
2504
2505         val = jread32(jme, JME_SMBINTF);
2506         to = JME_SMB_BUSY_TIMEOUT;
2507         while ((val & SMBINTF_HWCMD) && --to) {
2508                 msleep(1);
2509                 val = jread32(jme, JME_SMBINTF);
2510         }
2511         if (!to) {
2512                 msg_hw(jme, "SMB Bus Busy.\n");
2513                 return;
2514         }
2515
2516         mdelay(2);
2517 }
2518
2519 static int
2520 jme_get_eeprom_len(struct net_device *netdev)
2521 {
2522         struct jme_adapter *jme = netdev_priv(netdev);
2523         u32 val;
2524         val = jread32(jme, JME_SMBCSR);
2525         return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2526 }
2527
2528 static int
2529 jme_get_eeprom(struct net_device *netdev,
2530                 struct ethtool_eeprom *eeprom, u8 *data)
2531 {
2532         struct jme_adapter *jme = netdev_priv(netdev);
2533         int i, offset = eeprom->offset, len = eeprom->len;
2534
2535         /*
2536          * ethtool will check the boundary for us
2537          */
2538         eeprom->magic = JME_EEPROM_MAGIC;
2539         for (i = 0 ; i < len ; ++i)
2540                 data[i] = jme_smb_read(jme, i + offset);
2541
2542         return 0;
2543 }
2544
2545 static int
2546 jme_set_eeprom(struct net_device *netdev,
2547                 struct ethtool_eeprom *eeprom, u8 *data)
2548 {
2549         struct jme_adapter *jme = netdev_priv(netdev);
2550         int i, offset = eeprom->offset, len = eeprom->len;
2551
2552         if (eeprom->magic != JME_EEPROM_MAGIC)
2553                 return -EINVAL;
2554
2555         /*
2556          * ethtool will check the boundary for us
2557          */
2558         for (i = 0 ; i < len ; ++i)
2559                 jme_smb_write(jme, i + offset, data[i]);
2560
2561         return 0;
2562 }
2563
2564 static const struct ethtool_ops jme_ethtool_ops = {
2565         .get_drvinfo            = jme_get_drvinfo,
2566         .get_regs_len           = jme_get_regs_len,
2567         .get_regs               = jme_get_regs,
2568         .get_coalesce           = jme_get_coalesce,
2569         .set_coalesce           = jme_set_coalesce,
2570         .get_pauseparam         = jme_get_pauseparam,
2571         .set_pauseparam         = jme_set_pauseparam,
2572         .get_wol                = jme_get_wol,
2573         .set_wol                = jme_set_wol,
2574         .get_settings           = jme_get_settings,
2575         .set_settings           = jme_set_settings,
2576         .get_link               = jme_get_link,
2577         .get_msglevel           = jme_get_msglevel,
2578         .set_msglevel           = jme_set_msglevel,
2579         .get_rx_csum            = jme_get_rx_csum,
2580         .set_rx_csum            = jme_set_rx_csum,
2581         .set_tx_csum            = jme_set_tx_csum,
2582         .set_tso                = jme_set_tso,
2583         .set_sg                 = ethtool_op_set_sg,
2584         .nway_reset             = jme_nway_reset,
2585         .get_eeprom_len         = jme_get_eeprom_len,
2586         .get_eeprom             = jme_get_eeprom,
2587         .set_eeprom             = jme_set_eeprom,
2588 };
2589
2590 static int
2591 jme_pci_dma64(struct pci_dev *pdev)
2592 {
2593         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
2594                 if (!pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
2595                         return 1;
2596
2597         if (!pci_set_dma_mask(pdev, DMA_40BIT_MASK))
2598                 if (!pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK))
2599                         return 1;
2600
2601         if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
2602                 if (!pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))
2603                         return 0;
2604
2605         return -1;
2606 }
2607
2608 static inline void
2609 jme_phy_init(struct jme_adapter *jme)
2610 {
2611         u16 reg26;
2612
2613         reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2614         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2615 }
2616
2617 static inline void
2618 jme_check_hw_ver(struct jme_adapter *jme)
2619 {
2620         u32 chipmode;
2621
2622         chipmode = jread32(jme, JME_CHIPMODE);
2623
2624         jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2625         jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2626 }
2627
2628 static int __devinit
2629 jme_init_one(struct pci_dev *pdev,
2630              const struct pci_device_id *ent)
2631 {
2632         int rc = 0, using_dac, i;
2633         struct net_device *netdev;
2634         struct jme_adapter *jme;
2635         u16 bmcr, bmsr;
2636         u32 apmc;
2637
2638         /*
2639          * set up PCI device basics
2640          */
2641         rc = pci_enable_device(pdev);
2642         if (rc) {
2643                 jeprintk(pdev, "Cannot enable PCI device.\n");
2644                 goto err_out;
2645         }
2646
2647         using_dac = jme_pci_dma64(pdev);
2648         if (using_dac < 0) {
2649                 jeprintk(pdev, "Cannot set PCI DMA Mask.\n");
2650                 rc = -EIO;
2651                 goto err_out_disable_pdev;
2652         }
2653
2654         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2655                 jeprintk(pdev, "No PCI resource region found.\n");
2656                 rc = -ENOMEM;
2657                 goto err_out_disable_pdev;
2658         }
2659
2660         rc = pci_request_regions(pdev, DRV_NAME);
2661         if (rc) {
2662                 jeprintk(pdev, "Cannot obtain PCI resource region.\n");
2663                 goto err_out_disable_pdev;
2664         }
2665
2666         pci_set_master(pdev);
2667
2668         /*
2669          * alloc and init net device
2670          */
2671         netdev = alloc_etherdev(sizeof(*jme));
2672         if (!netdev) {
2673                 jeprintk(pdev, "Cannot allocate netdev structure.\n");
2674                 rc = -ENOMEM;
2675                 goto err_out_release_regions;
2676         }
2677         netdev->open                    = jme_open;
2678         netdev->stop                    = jme_close;
2679         netdev->hard_start_xmit         = jme_start_xmit;
2680         netdev->set_mac_address         = jme_set_macaddr;
2681         netdev->set_multicast_list      = jme_set_multi;
2682         netdev->change_mtu              = jme_change_mtu;
2683         netdev->ethtool_ops             = &jme_ethtool_ops;
2684         netdev->tx_timeout              = jme_tx_timeout;
2685         netdev->watchdog_timeo          = TX_TIMEOUT;
2686         netdev->vlan_rx_register        = jme_vlan_rx_register;
2687         NETDEV_GET_STATS(netdev, &jme_get_stats);
2688         netdev->features                =       NETIF_F_HW_CSUM |
2689                                                 NETIF_F_SG |
2690                                                 NETIF_F_TSO |
2691                                                 NETIF_F_TSO6 |
2692                                                 NETIF_F_HW_VLAN_TX |
2693                                                 NETIF_F_HW_VLAN_RX;
2694         if (using_dac)
2695                 netdev->features        |=      NETIF_F_HIGHDMA;
2696
2697         SET_NETDEV_DEV(netdev, &pdev->dev);
2698         pci_set_drvdata(pdev, netdev);
2699
2700         /*
2701          * init adapter info
2702          */
2703         jme = netdev_priv(netdev);
2704         jme->pdev = pdev;
2705         jme->dev = netdev;
2706         jme->jme_rx = netif_rx;
2707         jme->jme_vlan_rx = vlan_hwaccel_rx;
2708         jme->old_mtu = netdev->mtu = 1500;
2709         jme->phylink = 0;
2710         jme->tx_ring_size = 1 << 10;
2711         jme->tx_ring_mask = jme->tx_ring_size - 1;
2712         jme->tx_wake_threshold = 1 << 9;
2713         jme->rx_ring_size = 1 << 9;
2714         jme->rx_ring_mask = jme->rx_ring_size - 1;
2715         jme->msg_enable = JME_DEF_MSG_ENABLE;
2716         jme->regs = ioremap(pci_resource_start(pdev, 0),
2717                              pci_resource_len(pdev, 0));
2718         if (!(jme->regs)) {
2719                 jeprintk(pdev, "Mapping PCI resource region error.\n");
2720                 rc = -ENOMEM;
2721                 goto err_out_free_netdev;
2722         }
2723         jme->shadow_regs = pci_alloc_consistent(pdev,
2724                                                 sizeof(u32) * SHADOW_REG_NR,
2725                                                 &(jme->shadow_dma));
2726         if (!(jme->shadow_regs)) {
2727                 jeprintk(pdev, "Allocating shadow register mapping error.\n");
2728                 rc = -ENOMEM;
2729                 goto err_out_unmap;
2730         }
2731
2732         if (no_pseudohp) {
2733                 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2734                 jwrite32(jme, JME_APMC, apmc);
2735         } else if (force_pseudohp) {
2736                 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2737                 jwrite32(jme, JME_APMC, apmc);
2738         }
2739
2740         NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2741
2742         spin_lock_init(&jme->phy_lock);
2743         spin_lock_init(&jme->macaddr_lock);
2744         spin_lock_init(&jme->rxmcs_lock);
2745
2746         atomic_set(&jme->link_changing, 1);
2747         atomic_set(&jme->rx_cleaning, 1);
2748         atomic_set(&jme->tx_cleaning, 1);
2749         atomic_set(&jme->rx_empty, 1);
2750
2751         tasklet_init(&jme->pcc_task,
2752                      &jme_pcc_tasklet,
2753                      (unsigned long) jme);
2754         tasklet_init(&jme->linkch_task,
2755                      &jme_link_change_tasklet,
2756                      (unsigned long) jme);
2757         tasklet_init(&jme->txclean_task,
2758                      &jme_tx_clean_tasklet,
2759                      (unsigned long) jme);
2760         tasklet_init(&jme->rxclean_task,
2761                      &jme_rx_clean_tasklet,
2762                      (unsigned long) jme);
2763         tasklet_init(&jme->rxempty_task,
2764                      &jme_rx_empty_tasklet,
2765                      (unsigned long) jme);
2766         tasklet_disable_nosync(&jme->txclean_task);
2767         tasklet_disable_nosync(&jme->rxclean_task);
2768         tasklet_disable_nosync(&jme->rxempty_task);
2769         jme->dpi.cur = PCC_P1;
2770
2771         jme->reg_ghc = 0;
2772         jme->reg_rxcs = RXCS_DEFAULT;
2773         jme->reg_rxmcs = RXMCS_DEFAULT;
2774         jme->reg_txpfc = 0;
2775         jme->reg_pmcs = PMCS_MFEN;
2776         set_bit(JME_FLAG_TXCSUM, &jme->flags);
2777         set_bit(JME_FLAG_TSO, &jme->flags);
2778
2779         /*
2780          * Get Max Read Req Size from PCI Config Space
2781          */
2782         pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
2783         jme->mrrs &= PCI_DCSR_MRRS_MASK;
2784         switch (jme->mrrs) {
2785         case MRRS_128B:
2786                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
2787                 break;
2788         case MRRS_256B:
2789                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
2790                 break;
2791         default:
2792                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
2793                 break;
2794         };
2795
2796         /*
2797          * Must check before reset_mac_processor
2798          */
2799         jme_check_hw_ver(jme);
2800         jme->mii_if.dev = netdev;
2801         if (jme->fpgaver) {
2802                 jme->mii_if.phy_id = 0;
2803                 for (i = 1 ; i < 32 ; ++i) {
2804                         bmcr = jme_mdio_read(netdev, i, MII_BMCR);
2805                         bmsr = jme_mdio_read(netdev, i, MII_BMSR);
2806                         if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
2807                                 jme->mii_if.phy_id = i;
2808                                 break;
2809                         }
2810                 }
2811
2812                 if (!jme->mii_if.phy_id) {
2813                         rc = -EIO;
2814                         jeprintk(pdev, "Can not find phy_id.\n");
2815                          goto err_out_free_shadow;
2816                 }
2817
2818                 jme->reg_ghc |= GHC_LINK_POLL;
2819         } else {
2820                 jme->mii_if.phy_id = 1;
2821         }
2822         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
2823                 jme->mii_if.supports_gmii = true;
2824         else
2825                 jme->mii_if.supports_gmii = false;
2826         jme->mii_if.mdio_read = jme_mdio_read;
2827         jme->mii_if.mdio_write = jme_mdio_write;
2828
2829         jme_clear_pm(jme);
2830         jme_set_phyfifoa(jme);
2831         pci_read_config_byte(pdev, PCI_REVISION_ID, &jme->rev);
2832         if (!jme->fpgaver)
2833                 jme_phy_init(jme);
2834         jme_phy_off(jme);
2835
2836         /*
2837          * Reset MAC processor and reload EEPROM for MAC Address
2838          */
2839         jme_reset_mac_processor(jme);
2840         rc = jme_reload_eeprom(jme);
2841         if (rc) {
2842                 jeprintk(pdev,
2843                         "Reload eeprom for reading MAC Address error.\n");
2844                 goto err_out_free_shadow;
2845         }
2846         jme_load_macaddr(netdev);
2847
2848         /*
2849          * Tell stack that we are not ready to work until open()
2850          */
2851         netif_carrier_off(netdev);
2852         netif_stop_queue(netdev);
2853
2854         /*
2855          * Register netdev
2856          */
2857         rc = register_netdev(netdev);
2858         if (rc) {
2859                 jeprintk(pdev, "Cannot register net device.\n");
2860                 goto err_out_free_shadow;
2861         }
2862
2863         msg_probe(jme, "JMC250 gigabit%s ver:%x rev:%x macaddr:%pM\n",
2864                 (jme->fpgaver != 0) ? " (FPGA)" : "",
2865                 (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
2866                 jme->rev, netdev->dev_addr);
2867
2868         return 0;
2869
2870 err_out_free_shadow:
2871         pci_free_consistent(pdev,
2872                             sizeof(u32) * SHADOW_REG_NR,
2873                             jme->shadow_regs,
2874                             jme->shadow_dma);
2875 err_out_unmap:
2876         iounmap(jme->regs);
2877 err_out_free_netdev:
2878         pci_set_drvdata(pdev, NULL);
2879         free_netdev(netdev);
2880 err_out_release_regions:
2881         pci_release_regions(pdev);
2882 err_out_disable_pdev:
2883         pci_disable_device(pdev);
2884 err_out:
2885         return rc;
2886 }
2887
2888 static void __devexit
2889 jme_remove_one(struct pci_dev *pdev)
2890 {
2891         struct net_device *netdev = pci_get_drvdata(pdev);
2892         struct jme_adapter *jme = netdev_priv(netdev);
2893
2894         unregister_netdev(netdev);
2895         pci_free_consistent(pdev,
2896                             sizeof(u32) * SHADOW_REG_NR,
2897                             jme->shadow_regs,
2898                             jme->shadow_dma);
2899         iounmap(jme->regs);
2900         pci_set_drvdata(pdev, NULL);
2901         free_netdev(netdev);
2902         pci_release_regions(pdev);
2903         pci_disable_device(pdev);
2904
2905 }
2906
2907 #ifdef CONFIG_PM
2908 static int
2909 jme_suspend(struct pci_dev *pdev, pm_message_t state)
2910 {
2911         struct net_device *netdev = pci_get_drvdata(pdev);
2912         struct jme_adapter *jme = netdev_priv(netdev);
2913
2914         atomic_dec(&jme->link_changing);
2915
2916         netif_device_detach(netdev);
2917         netif_stop_queue(netdev);
2918         jme_stop_irq(jme);
2919
2920         tasklet_disable(&jme->txclean_task);
2921         tasklet_disable(&jme->rxclean_task);
2922         tasklet_disable(&jme->rxempty_task);
2923
2924         jme_disable_shadow(jme);
2925
2926         if (netif_carrier_ok(netdev)) {
2927                 if (test_bit(JME_FLAG_POLL, &jme->flags))
2928                         jme_polling_mode(jme);
2929
2930                 jme_stop_pcc_timer(jme);
2931                 jme_reset_ghc_speed(jme);
2932                 jme_disable_rx_engine(jme);
2933                 jme_disable_tx_engine(jme);
2934                 jme_reset_mac_processor(jme);
2935                 jme_free_rx_resources(jme);
2936                 jme_free_tx_resources(jme);
2937                 netif_carrier_off(netdev);
2938                 jme->phylink = 0;
2939         }
2940
2941         tasklet_enable(&jme->txclean_task);
2942         tasklet_hi_enable(&jme->rxclean_task);
2943         tasklet_hi_enable(&jme->rxempty_task);
2944
2945         pci_save_state(pdev);
2946         if (jme->reg_pmcs) {
2947                 jme_set_100m_half(jme);
2948
2949                 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2950                         jme_wait_link(jme);
2951
2952                 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2953
2954                 pci_enable_wake(pdev, PCI_D3cold, true);
2955         } else {
2956                 jme_phy_off(jme);
2957         }
2958         pci_set_power_state(pdev, PCI_D3cold);
2959
2960         return 0;
2961 }
2962
2963 static int
2964 jme_resume(struct pci_dev *pdev)
2965 {
2966         struct net_device *netdev = pci_get_drvdata(pdev);
2967         struct jme_adapter *jme = netdev_priv(netdev);
2968
2969         jme_clear_pm(jme);
2970         pci_restore_state(pdev);
2971
2972         if (test_bit(JME_FLAG_SSET, &jme->flags))
2973                 jme_set_settings(netdev, &jme->old_ecmd);
2974         else
2975                 jme_reset_phy_processor(jme);
2976
2977         jme_enable_shadow(jme);
2978         jme_start_irq(jme);
2979         netif_device_attach(netdev);
2980
2981         atomic_inc(&jme->link_changing);
2982
2983         jme_reset_link(jme);
2984
2985         return 0;
2986 }
2987 #endif
2988
2989 static struct pci_device_id jme_pci_tbl[] = {
2990         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
2991         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
2992         { }
2993 };
2994
2995 static struct pci_driver jme_driver = {
2996         .name           = DRV_NAME,
2997         .id_table       = jme_pci_tbl,
2998         .probe          = jme_init_one,
2999         .remove         = __devexit_p(jme_remove_one),
3000 #ifdef CONFIG_PM
3001         .suspend        = jme_suspend,
3002         .resume         = jme_resume,
3003 #endif /* CONFIG_PM */
3004 };
3005
3006 static int __init
3007 jme_init_module(void)
3008 {
3009         printk(KERN_INFO PFX "JMicron JMC250 gigabit ethernet "
3010                "driver version %s\n", DRV_VERSION);
3011         return pci_register_driver(&jme_driver);
3012 }
3013
3014 static void __exit
3015 jme_cleanup_module(void)
3016 {
3017         pci_unregister_driver(&jme_driver);
3018 }
3019
3020 module_init(jme_init_module);
3021 module_exit(jme_cleanup_module);
3022
3023 MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3024 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3025 MODULE_LICENSE("GPL");
3026 MODULE_VERSION(DRV_VERSION);
3027 MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3028