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                 netif_info(jme, rx_status, jme->dev, "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 u32
 326 jme_linkstat_from_phy(struct jme_adapter *jme)
 327 {
 328         u32 phylink, bmsr;
 329
 330         phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
 331         bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
 332         if (bmsr & BMSR_ANCOMP)
 333                 phylink |= PHY_LINK_AUTONEG_COMPLETE;
 334
 335         return phylink;
 336 }
 337
 338 static inline void
 339 jme_set_phyfifoa(struct jme_adapter *jme)
 340 {
 341         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
 342 }
 343
 344 static inline void
 345 jme_set_phyfifob(struct jme_adapter *jme)
 346 {
 347         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
 348 }
 349
 350 static int
 351 jme_check_link(struct net_device *netdev, int testonly)
 352 {
 353         struct jme_adapter *jme = netdev_priv(netdev);
 354         u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1;
 355         char linkmsg[64];
 356         int rc = 0;
 357
 358         linkmsg[0] = '\0';
 359
 360         if (jme->fpgaver)
 361                 phylink = jme_linkstat_from_phy(jme);
 362         else
 363                 phylink = jread32(jme, JME_PHY_LINK);
 364
 365         if (phylink & PHY_LINK_UP) {
 366                 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
 367                         /*
 368                          * If we did not enable AN
 369                          * Speed/Duplex Info should be obtained from SMI
 370                          */
 371                         phylink = PHY_LINK_UP;
 372
 373                         bmcr = jme_mdio_read(jme->dev,
 374                                                 jme->mii_if.phy_id,
 375                                                 MII_BMCR);
 376
 377                         phylink |= ((bmcr & BMCR_SPEED1000) &&
 378                                         (bmcr & BMCR_SPEED100) == 0) ?
 379                                         PHY_LINK_SPEED_1000M :
 380                                         (bmcr & BMCR_SPEED100) ?
 381                                         PHY_LINK_SPEED_100M :
 382                                         PHY_LINK_SPEED_10M;
 383
 384                         phylink |= (bmcr & BMCR_FULLDPLX) ?
 385                                          PHY_LINK_DUPLEX : 0;
 386
 387                         strcat(linkmsg, "Forced: ");
 388                 } else {
 389                         /*
 390                          * Keep polling for speed/duplex resolve complete
 391                          */
 392                         while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
 393                                 --cnt) {
 394
 395                                 udelay(1);
 396
 397                                 if (jme->fpgaver)
 398                                         phylink = jme_linkstat_from_phy(jme);
 399                                 else
 400                                         phylink = jread32(jme, JME_PHY_LINK);
 401                         }
 402                         if (!cnt)
 403                                 jeprintk(jme->pdev,
 404                                         "Waiting speed resolve timeout.\n");
 405
 406                         strcat(linkmsg, "ANed: ");
 407                 }
 408
 409                 if (jme->phylink == phylink) {
 410                         rc = 1;
 411                         goto out;
 412                 }
 413                 if (testonly)
 414                         goto out;
 415
 416                 jme->phylink = phylink;
 417
 418                 ghc = jme->reg_ghc & ~(GHC_SPEED | GHC_DPX |
 419                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE |
 420                                 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY);
 421                 switch (phylink & PHY_LINK_SPEED_MASK) {
 422                 case PHY_LINK_SPEED_10M:
 423                         ghc |= GHC_SPEED_10M |
 424                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
 425                         strcat(linkmsg, "10 Mbps, ");
 426                         break;
 427                 case PHY_LINK_SPEED_100M:
 428                         ghc |= GHC_SPEED_100M |
 429                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
 430                         strcat(linkmsg, "100 Mbps, ");
 431                         break;
 432                 case PHY_LINK_SPEED_1000M:
 433                         ghc |= GHC_SPEED_1000M |
 434                                 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
 435                         strcat(linkmsg, "1000 Mbps, ");
 436                         break;
 437                 default:
 438                         break;
 439                 }
 440
 441                 if (phylink & PHY_LINK_DUPLEX) {
 442                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
 443                         ghc |= GHC_DPX;
 444                 } else {
 445                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
 446                                                 TXMCS_BACKOFF |
 447                                                 TXMCS_CARRIERSENSE |
 448                                                 TXMCS_COLLISION);
 449                         jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN |
 450                                 ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) |
 451                                 TXTRHD_TXREN |
 452                                 ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL));
 453                 }
 454
 455                 gpreg1 = GPREG1_DEFAULT;
 456                 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
 457                         if (!(phylink & PHY_LINK_DUPLEX))
 458                                 gpreg1 |= GPREG1_HALFMODEPATCH;
 459                         switch (phylink & PHY_LINK_SPEED_MASK) {
 460                         case PHY_LINK_SPEED_10M:
 461                                 jme_set_phyfifoa(jme);
 462                                 gpreg1 |= GPREG1_RSSPATCH;
 463                                 break;
 464                         case PHY_LINK_SPEED_100M:
 465                                 jme_set_phyfifob(jme);
 466                                 gpreg1 |= GPREG1_RSSPATCH;
 467                                 break;
 468                         case PHY_LINK_SPEED_1000M:
 469                                 jme_set_phyfifoa(jme);
 470                                 break;
 471                         default:
 472                                 break;
 473                         }
 474                 }
 475
 476                 jwrite32(jme, JME_GPREG1, gpreg1);
 477                 jwrite32(jme, JME_GHC, ghc);
 478                 jme->reg_ghc = ghc;
 479
 480                 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
 481                                         "Full-Duplex, " :
 482                                         "Half-Duplex, ");
 483                 strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
 484                                         "MDI-X" :
 485                                         "MDI");
 486                 netif_info(jme, link, jme->dev, "Link is up at %s.\n", linkmsg);
 487                 netif_carrier_on(netdev);
 488         } else {
 489                 if (testonly)
 490                         goto out;
 491
 492                 netif_info(jme, link, jme->dev, "Link is down.\n");
 493                 jme->phylink = 0;
 494                 netif_carrier_off(netdev);
 495         }
 496
 497 out:
 498         return rc;
 499 }
 500
 501 static int
 502 jme_setup_tx_resources(struct jme_adapter *jme)
 503 {
 504         struct jme_ring *txring = &(jme->txring[0]);
 505
 506         txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
 507                                    TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 508                                    &(txring->dmaalloc),
 509                                    GFP_ATOMIC);
 510
 511         if (!txring->alloc)
 512                 goto err_set_null;
 513
 514         /*
 515          * 16 Bytes align
 516          */
 517         txring->desc            = (void *)ALIGN((unsigned long)(txring->alloc),
 518                                                 RING_DESC_ALIGN);
 519         txring->dma             = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
 520         txring->next_to_use     = 0;
 521         atomic_set(&txring->next_to_clean, 0);
 522         atomic_set(&txring->nr_free, jme->tx_ring_size);
 523
 524         txring->bufinf          = kmalloc(sizeof(struct jme_buffer_info) *
 525                                         jme->tx_ring_size, GFP_ATOMIC);
 526         if (unlikely(!(txring->bufinf)))
 527                 goto err_free_txring;
 528
 529         /*
 530          * Initialize Transmit Descriptors
 531          */
 532         memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
 533         memset(txring->bufinf, 0,
 534                 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
 535
 536         return 0;
 537
 538 err_free_txring:
 539         dma_free_coherent(&(jme->pdev->dev),
 540                           TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 541                           txring->alloc,
 542                           txring->dmaalloc);
 543
 544 err_set_null:
 545         txring->desc = NULL;
 546         txring->dmaalloc = 0;
 547         txring->dma = 0;
 548         txring->bufinf = NULL;
 549
 550         return -ENOMEM;
 551 }
 552
 553 static void
 554 jme_free_tx_resources(struct jme_adapter *jme)
 555 {
 556         int i;
 557         struct jme_ring *txring = &(jme->txring[0]);
 558         struct jme_buffer_info *txbi;
 559
 560         if (txring->alloc) {
 561                 if (txring->bufinf) {
 562                         for (i = 0 ; i < jme->tx_ring_size ; ++i) {
 563                                 txbi = txring->bufinf + i;
 564                                 if (txbi->skb) {
 565                                         dev_kfree_skb(txbi->skb);
 566                                         txbi->skb = NULL;
 567                                 }
 568                                 txbi->mapping           = 0;
 569                                 txbi->len               = 0;
 570                                 txbi->nr_desc           = 0;
 571                                 txbi->start_xmit        = 0;
 572                         }
 573                         kfree(txring->bufinf);
 574                 }
 575
 576                 dma_free_coherent(&(jme->pdev->dev),
 577                                   TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 578                                   txring->alloc,
 579                                   txring->dmaalloc);
 580
 581                 txring->alloc           = NULL;
 582                 txring->desc            = NULL;
 583                 txring->dmaalloc        = 0;
 584                 txring->dma             = 0;
 585                 txring->bufinf          = NULL;
 586         }
 587         txring->next_to_use     = 0;
 588         atomic_set(&txring->next_to_clean, 0);
 589         atomic_set(&txring->nr_free, 0);
 590 }
 591
 592 static inline void
 593 jme_enable_tx_engine(struct jme_adapter *jme)
 594 {
 595         /*
 596          * Select Queue 0
 597          */
 598         jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
 599         wmb();
 600
 601         /*
 602          * Setup TX Queue 0 DMA Bass Address
 603          */
 604         jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
 605         jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
 606         jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
 607
 608         /*
 609          * Setup TX Descptor Count
 610          */
 611         jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
 612
 613         /*
 614          * Enable TX Engine
 615          */
 616         wmb();
 617         jwrite32(jme, JME_TXCS, jme->reg_txcs |
 618                                 TXCS_SELECT_QUEUE0 |
 619                                 TXCS_ENABLE);
 620
 621 }
 622
 623 static inline void
 624 jme_restart_tx_engine(struct jme_adapter *jme)
 625 {
 626         /*
 627          * Restart TX Engine
 628          */
 629         jwrite32(jme, JME_TXCS, jme->reg_txcs |
 630                                 TXCS_SELECT_QUEUE0 |
 631                                 TXCS_ENABLE);
 632 }
 633
 634 static inline void
 635 jme_disable_tx_engine(struct jme_adapter *jme)
 636 {
 637         int i;
 638         u32 val;
 639
 640         /*
 641          * Disable TX Engine
 642          */
 643         jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
 644         wmb();
 645
 646         val = jread32(jme, JME_TXCS);
 647         for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
 648                 mdelay(1);
 649                 val = jread32(jme, JME_TXCS);
 650                 rmb();
 651         }
 652
 653         if (!i)
 654                 jeprintk(jme->pdev, "Disable TX engine timeout.\n");
 655 }
 656
 657 static void
 658 jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
 659 {
 660         struct jme_ring *rxring = &(jme->rxring[0]);
 661         register struct rxdesc *rxdesc = rxring->desc;
 662         struct jme_buffer_info *rxbi = rxring->bufinf;
 663         rxdesc += i;
 664         rxbi += i;
 665
 666         rxdesc->dw[0] = 0;
 667         rxdesc->dw[1] = 0;
 668         rxdesc->desc1.bufaddrh  = cpu_to_le32((__u64)rxbi->mapping >> 32);
 669         rxdesc->desc1.bufaddrl  = cpu_to_le32(
 670                                         (__u64)rxbi->mapping & 0xFFFFFFFFUL);
 671         rxdesc->desc1.datalen   = cpu_to_le16(rxbi->len);
 672         if (jme->dev->features & NETIF_F_HIGHDMA)
 673                 rxdesc->desc1.flags = RXFLAG_64BIT;
 674         wmb();
 675         rxdesc->desc1.flags     |= RXFLAG_OWN | RXFLAG_INT;
 676 }
 677
 678 static int
 679 jme_make_new_rx_buf(struct jme_adapter *jme, int i)
 680 {
 681         struct jme_ring *rxring = &(jme->rxring[0]);
 682         struct jme_buffer_info *rxbi = rxring->bufinf + i;
 683         struct sk_buff *skb;
 684
 685         skb = netdev_alloc_skb(jme->dev,
 686                 jme->dev->mtu + RX_EXTRA_LEN);
 687         if (unlikely(!skb))
 688                 return -ENOMEM;
 689
 690         rxbi->skb = skb;
 691         rxbi->len = skb_tailroom(skb);
 692         rxbi->mapping = pci_map_page(jme->pdev,
 693                                         virt_to_page(skb->data),
 694                                         offset_in_page(skb->data),
 695                                         rxbi->len,
 696                                         PCI_DMA_FROMDEVICE);
 697
 698         return 0;
 699 }
 700
 701 static void
 702 jme_free_rx_buf(struct jme_adapter *jme, int i)
 703 {
 704         struct jme_ring *rxring = &(jme->rxring[0]);
 705         struct jme_buffer_info *rxbi = rxring->bufinf;
 706         rxbi += i;
 707
 708         if (rxbi->skb) {
 709                 pci_unmap_page(jme->pdev,
 710                                  rxbi->mapping,
 711                                  rxbi->len,
 712                                  PCI_DMA_FROMDEVICE);
 713                 dev_kfree_skb(rxbi->skb);
 714                 rxbi->skb = NULL;
 715                 rxbi->mapping = 0;
 716                 rxbi->len = 0;
 717         }
 718 }
 719
 720 static void
 721 jme_free_rx_resources(struct jme_adapter *jme)
 722 {
 723         int i;
 724         struct jme_ring *rxring = &(jme->rxring[0]);
 725
 726         if (rxring->alloc) {
 727                 if (rxring->bufinf) {
 728                         for (i = 0 ; i < jme->rx_ring_size ; ++i)
 729                                 jme_free_rx_buf(jme, i);
 730                         kfree(rxring->bufinf);
 731                 }
 732
 733                 dma_free_coherent(&(jme->pdev->dev),
 734                                   RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 735                                   rxring->alloc,
 736                                   rxring->dmaalloc);
 737                 rxring->alloc    = NULL;
 738                 rxring->desc     = NULL;
 739                 rxring->dmaalloc = 0;
 740                 rxring->dma      = 0;
 741                 rxring->bufinf   = NULL;
 742         }
 743         rxring->next_to_use   = 0;
 744         atomic_set(&rxring->next_to_clean, 0);
 745 }
 746
 747 static int
 748 jme_setup_rx_resources(struct jme_adapter *jme)
 749 {
 750         int i;
 751         struct jme_ring *rxring = &(jme->rxring[0]);
 752
 753         rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
 754                                    RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 755                                    &(rxring->dmaalloc),
 756                                    GFP_ATOMIC);
 757         if (!rxring->alloc)
 758                 goto err_set_null;
 759
 760         /*
 761          * 16 Bytes align
 762          */
 763         rxring->desc            = (void *)ALIGN((unsigned long)(rxring->alloc),
 764                                                 RING_DESC_ALIGN);
 765         rxring->dma             = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
 766         rxring->next_to_use     = 0;
 767         atomic_set(&rxring->next_to_clean, 0);
 768
 769         rxring->bufinf          = kmalloc(sizeof(struct jme_buffer_info) *
 770                                         jme->rx_ring_size, GFP_ATOMIC);
 771         if (unlikely(!(rxring->bufinf)))
 772                 goto err_free_rxring;
 773
 774         /*
 775          * Initiallize Receive Descriptors
 776          */
 777         memset(rxring->bufinf, 0,
 778                 sizeof(struct jme_buffer_info) * jme->rx_ring_size);
 779         for (i = 0 ; i < jme->rx_ring_size ; ++i) {
 780                 if (unlikely(jme_make_new_rx_buf(jme, i))) {
 781                         jme_free_rx_resources(jme);
 782                         return -ENOMEM;
 783                 }
 784
 785                 jme_set_clean_rxdesc(jme, i);
 786         }
 787
 788         return 0;
 789
 790 err_free_rxring:
 791         dma_free_coherent(&(jme->pdev->dev),
 792                           RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 793                           rxring->alloc,
 794                           rxring->dmaalloc);
 795 err_set_null:
 796         rxring->desc = NULL;
 797         rxring->dmaalloc = 0;
 798         rxring->dma = 0;
 799         rxring->bufinf = NULL;
 800
 801         return -ENOMEM;
 802 }
 803
 804 static inline void
 805 jme_enable_rx_engine(struct jme_adapter *jme)
 806 {
 807         /*
 808          * Select Queue 0
 809          */
 810         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 811                                 RXCS_QUEUESEL_Q0);
 812         wmb();
 813
 814         /*
 815          * Setup RX DMA Bass Address
 816          */
 817         jwrite32(jme, JME_RXDBA_LO, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
 818         jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
 819         jwrite32(jme, JME_RXNDA, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
 820
 821         /*
 822          * Setup RX Descriptor Count
 823          */
 824         jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
 825
 826         /*
 827          * Setup Unicast Filter
 828          */
 829         jme_set_multi(jme->dev);
 830
 831         /*
 832          * Enable RX Engine
 833          */
 834         wmb();
 835         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 836                                 RXCS_QUEUESEL_Q0 |
 837                                 RXCS_ENABLE |
 838                                 RXCS_QST);
 839 }
 840
 841 static inline void
 842 jme_restart_rx_engine(struct jme_adapter *jme)
 843 {
 844         /*
 845          * Start RX Engine
 846          */
 847         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 848                                 RXCS_QUEUESEL_Q0 |
 849                                 RXCS_ENABLE |
 850                                 RXCS_QST);
 851 }
 852
 853 static inline void
 854 jme_disable_rx_engine(struct jme_adapter *jme)
 855 {
 856         int i;
 857         u32 val;
 858
 859         /*
 860          * Disable RX Engine
 861          */
 862         jwrite32(jme, JME_RXCS, jme->reg_rxcs);
 863         wmb();
 864
 865         val = jread32(jme, JME_RXCS);
 866         for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
 867                 mdelay(1);
 868                 val = jread32(jme, JME_RXCS);
 869                 rmb();
 870         }
 871
 872         if (!i)
 873                 jeprintk(jme->pdev, "Disable RX engine timeout.\n");
 874
 875 }
 876
 877 static int
 878 jme_rxsum_ok(struct jme_adapter *jme, u16 flags)
 879 {
 880         if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
 881                 return false;
 882
 883         if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_TCPON | RXWBFLAG_TCPCS))
 884                         == RXWBFLAG_TCPON)) {
 885                 if (flags & RXWBFLAG_IPV4)
 886                         netif_err(jme, rx_err, jme->dev, "TCP Checksum error\n");
 887                 return false;
 888         }
 889
 890         if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_UDPON | RXWBFLAG_UDPCS))
 891                         == RXWBFLAG_UDPON)) {
 892                 if (flags & RXWBFLAG_IPV4)
 893                         netif_err(jme, rx_err, jme->dev, "UDP Checksum error.\n");
 894                 return false;
 895         }
 896
 897         if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
 898                         == RXWBFLAG_IPV4)) {
 899                 netif_err(jme, rx_err, jme->dev, "IPv4 Checksum error.\n");
 900                 return false;
 901         }
 902
 903         return true;
 904 }
 905
 906 static void
 907 jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
 908 {
 909         struct jme_ring *rxring = &(jme->rxring[0]);
 910         struct rxdesc *rxdesc = rxring->desc;
 911         struct jme_buffer_info *rxbi = rxring->bufinf;
 912         struct sk_buff *skb;
 913         int framesize;
 914
 915         rxdesc += idx;
 916         rxbi += idx;
 917
 918         skb = rxbi->skb;
 919         pci_dma_sync_single_for_cpu(jme->pdev,
 920                                         rxbi->mapping,
 921                                         rxbi->len,
 922                                         PCI_DMA_FROMDEVICE);
 923
 924         if (unlikely(jme_make_new_rx_buf(jme, idx))) {
 925                 pci_dma_sync_single_for_device(jme->pdev,
 926                                                 rxbi->mapping,
 927                                                 rxbi->len,
 928                                                 PCI_DMA_FROMDEVICE);
 929
 930                 ++(NET_STAT(jme).rx_dropped);
 931         } else {
 932                 framesize = le16_to_cpu(rxdesc->descwb.framesize)
 933                                 - RX_PREPAD_SIZE;
 934
 935                 skb_reserve(skb, RX_PREPAD_SIZE);
 936                 skb_put(skb, framesize);
 937                 skb->protocol = eth_type_trans(skb, jme->dev);
 938
 939                 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags)))
 940                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 941                 else
 942                         skb->ip_summed = CHECKSUM_NONE;
 943
 944                 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
 945                         if (jme->vlgrp) {
 946                                 jme->jme_vlan_rx(skb, jme->vlgrp,
 947                                         le16_to_cpu(rxdesc->descwb.vlan));
 948                                 NET_STAT(jme).rx_bytes += 4;
 949                         } else {
 950                                 dev_kfree_skb(skb);
 951                         }
 952                 } else {
 953                         jme->jme_rx(skb);
 954                 }
 955
 956                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
 957                     cpu_to_le16(RXWBFLAG_DEST_MUL))
 958                         ++(NET_STAT(jme).multicast);
 959
 960                 NET_STAT(jme).rx_bytes += framesize;
 961                 ++(NET_STAT(jme).rx_packets);
 962         }
 963
 964         jme_set_clean_rxdesc(jme, idx);
 965
 966 }
 967
 968 static int
 969 jme_process_receive(struct jme_adapter *jme, int limit)
 970 {
 971         struct jme_ring *rxring = &(jme->rxring[0]);
 972         struct rxdesc *rxdesc = rxring->desc;
 973         int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
 974
 975         if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
 976                 goto out_inc;
 977
 978         if (unlikely(atomic_read(&jme->link_changing) != 1))
 979                 goto out_inc;
 980
 981         if (unlikely(!netif_carrier_ok(jme->dev)))
 982                 goto out_inc;
 983
 984         i = atomic_read(&rxring->next_to_clean);
 985         while (limit > 0) {
 986                 rxdesc = rxring->desc;
 987                 rxdesc += i;
 988
 989                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
 990                 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
 991                         goto out;
 992                 --limit;
 993
 994                 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
 995
 996                 if (unlikely(desccnt > 1 ||
 997                 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
 998
 999                         if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
1000                                 ++(NET_STAT(jme).rx_crc_errors);
1001                         else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
1002                                 ++(NET_STAT(jme).rx_fifo_errors);
1003                         else
1004                                 ++(NET_STAT(jme).rx_errors);
1005
1006                         if (desccnt > 1)
1007                                 limit -= desccnt - 1;
1008
1009                         for (j = i, ccnt = desccnt ; ccnt-- ; ) {
1010                                 jme_set_clean_rxdesc(jme, j);
1011                                 j = (j + 1) & (mask);
1012                         }
1013
1014                 } else {
1015                         jme_alloc_and_feed_skb(jme, i);
1016                 }
1017
1018                 i = (i + desccnt) & (mask);
1019         }
1020
1021 out:
1022         atomic_set(&rxring->next_to_clean, i);
1023
1024 out_inc:
1025         atomic_inc(&jme->rx_cleaning);
1026
1027         return limit > 0 ? limit : 0;
1028
1029 }
1030
1031 static void
1032 jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1033 {
1034         if (likely(atmp == dpi->cur)) {
1035                 dpi->cnt = 0;
1036                 return;
1037         }
1038
1039         if (dpi->attempt == atmp) {
1040                 ++(dpi->cnt);
1041         } else {
1042                 dpi->attempt = atmp;
1043                 dpi->cnt = 0;
1044         }
1045
1046 }
1047
1048 static void
1049 jme_dynamic_pcc(struct jme_adapter *jme)
1050 {
1051         register struct dynpcc_info *dpi = &(jme->dpi);
1052
1053         if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1054                 jme_attempt_pcc(dpi, PCC_P3);
1055         else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD ||
1056                  dpi->intr_cnt > PCC_INTR_THRESHOLD)
1057                 jme_attempt_pcc(dpi, PCC_P2);
1058         else
1059                 jme_attempt_pcc(dpi, PCC_P1);
1060
1061         if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1062                 if (dpi->attempt < dpi->cur)
1063                         tasklet_schedule(&jme->rxclean_task);
1064                 jme_set_rx_pcc(jme, dpi->attempt);
1065                 dpi->cur = dpi->attempt;
1066                 dpi->cnt = 0;
1067         }
1068 }
1069
1070 static void
1071 jme_start_pcc_timer(struct jme_adapter *jme)
1072 {
1073         struct dynpcc_info *dpi = &(jme->dpi);
1074         dpi->last_bytes         = NET_STAT(jme).rx_bytes;
1075         dpi->last_pkts          = NET_STAT(jme).rx_packets;
1076         dpi->intr_cnt           = 0;
1077         jwrite32(jme, JME_TMCSR,
1078                 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1079 }
1080
1081 static inline void
1082 jme_stop_pcc_timer(struct jme_adapter *jme)
1083 {
1084         jwrite32(jme, JME_TMCSR, 0);
1085 }
1086
1087 static void
1088 jme_shutdown_nic(struct jme_adapter *jme)
1089 {
1090         u32 phylink;
1091
1092         phylink = jme_linkstat_from_phy(jme);
1093
1094         if (!(phylink & PHY_LINK_UP)) {
1095                 /*
1096                  * Disable all interrupt before issue timer
1097                  */
1098                 jme_stop_irq(jme);
1099                 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1100         }
1101 }
1102
1103 static void
1104 jme_pcc_tasklet(unsigned long arg)
1105 {
1106         struct jme_adapter *jme = (struct jme_adapter *)arg;
1107         struct net_device *netdev = jme->dev;
1108
1109         if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1110                 jme_shutdown_nic(jme);
1111                 return;
1112         }
1113
1114         if (unlikely(!netif_carrier_ok(netdev) ||
1115                 (atomic_read(&jme->link_changing) != 1)
1116         )) {
1117                 jme_stop_pcc_timer(jme);
1118                 return;
1119         }
1120
1121         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1122                 jme_dynamic_pcc(jme);
1123
1124         jme_start_pcc_timer(jme);
1125 }
1126
1127 static inline void
1128 jme_polling_mode(struct jme_adapter *jme)
1129 {
1130         jme_set_rx_pcc(jme, PCC_OFF);
1131 }
1132
1133 static inline void
1134 jme_interrupt_mode(struct jme_adapter *jme)
1135 {
1136         jme_set_rx_pcc(jme, PCC_P1);
1137 }
1138
1139 static inline int
1140 jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1141 {
1142         u32 apmc;
1143         apmc = jread32(jme, JME_APMC);
1144         return apmc & JME_APMC_PSEUDO_HP_EN;
1145 }
1146
1147 static void
1148 jme_start_shutdown_timer(struct jme_adapter *jme)
1149 {
1150         u32 apmc;
1151
1152         apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1153         apmc &= ~JME_APMC_EPIEN_CTRL;
1154         if (!no_extplug) {
1155                 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1156                 wmb();
1157         }
1158         jwrite32f(jme, JME_APMC, apmc);
1159
1160         jwrite32f(jme, JME_TIMER2, 0);
1161         set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1162         jwrite32(jme, JME_TMCSR,
1163                 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1164 }
1165
1166 static void
1167 jme_stop_shutdown_timer(struct jme_adapter *jme)
1168 {
1169         u32 apmc;
1170
1171         jwrite32f(jme, JME_TMCSR, 0);
1172         jwrite32f(jme, JME_TIMER2, 0);
1173         clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1174
1175         apmc = jread32(jme, JME_APMC);
1176         apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1177         jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1178         wmb();
1179         jwrite32f(jme, JME_APMC, apmc);
1180 }
1181
1182 static void
1183 jme_link_change_tasklet(unsigned long arg)
1184 {
1185         struct jme_adapter *jme = (struct jme_adapter *)arg;
1186         struct net_device *netdev = jme->dev;
1187         int rc;
1188
1189         while (!atomic_dec_and_test(&jme->link_changing)) {
1190                 atomic_inc(&jme->link_changing);
1191                 netif_info(jme, intr, jme->dev, "Get link change lock failed.\n");
1192                 while (atomic_read(&jme->link_changing) != 1)
1193                         netif_info(jme, intr, jme->dev, "Waiting link change lock.\n");
1194         }
1195
1196         if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1197                 goto out;
1198
1199         jme->old_mtu = netdev->mtu;
1200         netif_stop_queue(netdev);
1201         if (jme_pseudo_hotplug_enabled(jme))
1202                 jme_stop_shutdown_timer(jme);
1203
1204         jme_stop_pcc_timer(jme);
1205         tasklet_disable(&jme->txclean_task);
1206         tasklet_disable(&jme->rxclean_task);
1207         tasklet_disable(&jme->rxempty_task);
1208
1209         if (netif_carrier_ok(netdev)) {
1210                 jme_reset_ghc_speed(jme);
1211                 jme_disable_rx_engine(jme);
1212                 jme_disable_tx_engine(jme);
1213                 jme_reset_mac_processor(jme);
1214                 jme_free_rx_resources(jme);
1215                 jme_free_tx_resources(jme);
1216
1217                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1218                         jme_polling_mode(jme);
1219
1220                 netif_carrier_off(netdev);
1221         }
1222
1223         jme_check_link(netdev, 0);
1224         if (netif_carrier_ok(netdev)) {
1225                 rc = jme_setup_rx_resources(jme);
1226                 if (rc) {
1227                         jeprintk(jme->pdev, "Allocating resources for RX error"
1228                                 ", Device STOPPED!\n");
1229                         goto out_enable_tasklet;
1230                 }
1231
1232                 rc = jme_setup_tx_resources(jme);
1233                 if (rc) {
1234                         jeprintk(jme->pdev, "Allocating resources for TX error"
1235                                 ", Device STOPPED!\n");
1236                         goto err_out_free_rx_resources;
1237                 }
1238
1239                 jme_enable_rx_engine(jme);
1240                 jme_enable_tx_engine(jme);
1241
1242                 netif_start_queue(netdev);
1243
1244                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1245                         jme_interrupt_mode(jme);
1246
1247                 jme_start_pcc_timer(jme);
1248         } else if (jme_pseudo_hotplug_enabled(jme)) {
1249                 jme_start_shutdown_timer(jme);
1250         }
1251
1252         goto out_enable_tasklet;
1253
1254 err_out_free_rx_resources:
1255         jme_free_rx_resources(jme);
1256 out_enable_tasklet:
1257         tasklet_enable(&jme->txclean_task);
1258         tasklet_hi_enable(&jme->rxclean_task);
1259         tasklet_hi_enable(&jme->rxempty_task);
1260 out:
1261         atomic_inc(&jme->link_changing);
1262 }
1263
1264 static void
1265 jme_rx_clean_tasklet(unsigned long arg)
1266 {
1267         struct jme_adapter *jme = (struct jme_adapter *)arg;
1268         struct dynpcc_info *dpi = &(jme->dpi);
1269
1270         jme_process_receive(jme, jme->rx_ring_size);
1271         ++(dpi->intr_cnt);
1272
1273 }
1274
1275 static int
1276 jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1277 {
1278         struct jme_adapter *jme = jme_napi_priv(holder);
1279         int rest;
1280
1281         rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1282
1283         while (atomic_read(&jme->rx_empty) > 0) {
1284                 atomic_dec(&jme->rx_empty);
1285                 ++(NET_STAT(jme).rx_dropped);
1286                 jme_restart_rx_engine(jme);
1287         }
1288         atomic_inc(&jme->rx_empty);
1289
1290         if (rest) {
1291                 JME_RX_COMPLETE(netdev, holder);
1292                 jme_interrupt_mode(jme);
1293         }
1294
1295         JME_NAPI_WEIGHT_SET(budget, rest);
1296         return JME_NAPI_WEIGHT_VAL(budget) - rest;
1297 }
1298
1299 static void
1300 jme_rx_empty_tasklet(unsigned long arg)
1301 {
1302         struct jme_adapter *jme = (struct jme_adapter *)arg;
1303
1304         if (unlikely(atomic_read(&jme->link_changing) != 1))
1305                 return;
1306
1307         if (unlikely(!netif_carrier_ok(jme->dev)))
1308                 return;
1309
1310         netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
1311
1312         jme_rx_clean_tasklet(arg);
1313
1314         while (atomic_read(&jme->rx_empty) > 0) {
1315                 atomic_dec(&jme->rx_empty);
1316                 ++(NET_STAT(jme).rx_dropped);
1317                 jme_restart_rx_engine(jme);
1318         }
1319         atomic_inc(&jme->rx_empty);
1320 }
1321
1322 static void
1323 jme_wake_queue_if_stopped(struct jme_adapter *jme)
1324 {
1325         struct jme_ring *txring = &(jme->txring[0]);
1326
1327         smp_wmb();
1328         if (unlikely(netif_queue_stopped(jme->dev) &&
1329         atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1330                 netif_info(jme, tx_done, jme->dev, "TX Queue Waked.\n");
1331                 netif_wake_queue(jme->dev);
1332         }
1333
1334 }
1335
1336 static void
1337 jme_tx_clean_tasklet(unsigned long arg)
1338 {
1339         struct jme_adapter *jme = (struct jme_adapter *)arg;
1340         struct jme_ring *txring = &(jme->txring[0]);
1341         struct txdesc *txdesc = txring->desc;
1342         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1343         int i, j, cnt = 0, max, err, mask;
1344
1345         tx_dbg(jme, "Into txclean.\n");
1346
1347         if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1348                 goto out;
1349
1350         if (unlikely(atomic_read(&jme->link_changing) != 1))
1351                 goto out;
1352
1353         if (unlikely(!netif_carrier_ok(jme->dev)))
1354                 goto out;
1355
1356         max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1357         mask = jme->tx_ring_mask;
1358
1359         for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1360
1361                 ctxbi = txbi + i;
1362
1363                 if (likely(ctxbi->skb &&
1364                 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1365
1366                         tx_dbg(jme, "txclean: %d+%d@%lu\n",
1367                                         i, ctxbi->nr_desc, jiffies);
1368
1369                         err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1370
1371                         for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1372                                 ttxbi = txbi + ((i + j) & (mask));
1373                                 txdesc[(i + j) & (mask)].dw[0] = 0;
1374
1375                                 pci_unmap_page(jme->pdev,
1376                                                  ttxbi->mapping,
1377                                                  ttxbi->len,
1378                                                  PCI_DMA_TODEVICE);
1379
1380                                 ttxbi->mapping = 0;
1381                                 ttxbi->len = 0;
1382                         }
1383
1384                         dev_kfree_skb(ctxbi->skb);
1385
1386                         cnt += ctxbi->nr_desc;
1387
1388                         if (unlikely(err)) {
1389                                 ++(NET_STAT(jme).tx_carrier_errors);
1390                         } else {
1391                                 ++(NET_STAT(jme).tx_packets);
1392                                 NET_STAT(jme).tx_bytes += ctxbi->len;
1393                         }
1394
1395                         ctxbi->skb = NULL;
1396                         ctxbi->len = 0;
1397                         ctxbi->start_xmit = 0;
1398
1399                 } else {
1400                         break;
1401                 }
1402
1403                 i = (i + ctxbi->nr_desc) & mask;
1404
1405                 ctxbi->nr_desc = 0;
1406         }
1407
1408         tx_dbg(jme, "txclean: done %d@%lu.\n", i, jiffies);
1409         atomic_set(&txring->next_to_clean, i);
1410         atomic_add(cnt, &txring->nr_free);
1411
1412         jme_wake_queue_if_stopped(jme);
1413
1414 out:
1415         atomic_inc(&jme->tx_cleaning);
1416 }
1417
1418 static void
1419 jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1420 {
1421         /*
1422          * Disable interrupt
1423          */
1424         jwrite32f(jme, JME_IENC, INTR_ENABLE);
1425
1426         if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1427                 /*
1428                  * Link change event is critical
1429                  * all other events are ignored
1430                  */
1431                 jwrite32(jme, JME_IEVE, intrstat);
1432                 tasklet_schedule(&jme->linkch_task);
1433                 goto out_reenable;
1434         }
1435
1436         if (intrstat & INTR_TMINTR) {
1437                 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1438                 tasklet_schedule(&jme->pcc_task);
1439         }
1440
1441         if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1442                 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1443                 tasklet_schedule(&jme->txclean_task);
1444         }
1445
1446         if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1447                 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1448                                                      INTR_PCCRX0 |
1449                                                      INTR_RX0EMP)) |
1450                                         INTR_RX0);
1451         }
1452
1453         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1454                 if (intrstat & INTR_RX0EMP)
1455                         atomic_inc(&jme->rx_empty);
1456
1457                 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1458                         if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1459                                 jme_polling_mode(jme);
1460                                 JME_RX_SCHEDULE(jme);
1461                         }
1462                 }
1463         } else {
1464                 if (intrstat & INTR_RX0EMP) {
1465                         atomic_inc(&jme->rx_empty);
1466                         tasklet_hi_schedule(&jme->rxempty_task);
1467                 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1468                         tasklet_hi_schedule(&jme->rxclean_task);
1469                 }
1470         }
1471
1472 out_reenable:
1473         /*
1474          * Re-enable interrupt
1475          */
1476         jwrite32f(jme, JME_IENS, INTR_ENABLE);
1477 }
1478
1479 static irqreturn_t
1480 jme_intr(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         intrstat = jread32(jme, JME_IEVE);
1487
1488         /*
1489          * Check if it's really an interrupt for us
1490          */
1491         if (unlikely((intrstat & INTR_ENABLE) == 0))
1492                 return IRQ_NONE;
1493
1494         /*
1495          * Check if the device still exist
1496          */
1497         if (unlikely(intrstat == ~((typeof(intrstat))0)))
1498                 return IRQ_NONE;
1499
1500         jme_intr_msi(jme, intrstat);
1501
1502         return IRQ_HANDLED;
1503 }
1504
1505 static irqreturn_t
1506 jme_msi(int irq, void *dev_id)
1507 {
1508         struct net_device *netdev = dev_id;
1509         struct jme_adapter *jme = netdev_priv(netdev);
1510         u32 intrstat;
1511
1512         intrstat = jread32(jme, JME_IEVE);
1513
1514         jme_intr_msi(jme, intrstat);
1515
1516         return IRQ_HANDLED;
1517 }
1518
1519 static void
1520 jme_reset_link(struct jme_adapter *jme)
1521 {
1522         jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1523 }
1524
1525 static void
1526 jme_restart_an(struct jme_adapter *jme)
1527 {
1528         u32 bmcr;
1529
1530         spin_lock_bh(&jme->phy_lock);
1531         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1532         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1533         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1534         spin_unlock_bh(&jme->phy_lock);
1535 }
1536
1537 static int
1538 jme_request_irq(struct jme_adapter *jme)
1539 {
1540         int rc;
1541         struct net_device *netdev = jme->dev;
1542         irq_handler_t handler = jme_intr;
1543         int irq_flags = IRQF_SHARED;
1544
1545         if (!pci_enable_msi(jme->pdev)) {
1546                 set_bit(JME_FLAG_MSI, &jme->flags);
1547                 handler = jme_msi;
1548                 irq_flags = 0;
1549         }
1550
1551         rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1552                           netdev);
1553         if (rc) {
1554                 jeprintk(jme->pdev,
1555                         "Unable to request %s interrupt (return: %d)\n",
1556                         test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1557                         rc);
1558
1559                 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1560                         pci_disable_msi(jme->pdev);
1561                         clear_bit(JME_FLAG_MSI, &jme->flags);
1562                 }
1563         } else {
1564                 netdev->irq = jme->pdev->irq;
1565         }
1566
1567         return rc;
1568 }
1569
1570 static void
1571 jme_free_irq(struct jme_adapter *jme)
1572 {
1573         free_irq(jme->pdev->irq, jme->dev);
1574         if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1575                 pci_disable_msi(jme->pdev);
1576                 clear_bit(JME_FLAG_MSI, &jme->flags);
1577                 jme->dev->irq = jme->pdev->irq;
1578         }
1579 }
1580
1581 static int
1582 jme_open(struct net_device *netdev)
1583 {
1584         struct jme_adapter *jme = netdev_priv(netdev);
1585         int rc;
1586
1587         jme_clear_pm(jme);
1588         JME_NAPI_ENABLE(jme);
1589
1590         tasklet_enable(&jme->linkch_task);
1591         tasklet_enable(&jme->txclean_task);
1592         tasklet_hi_enable(&jme->rxclean_task);
1593         tasklet_hi_enable(&jme->rxempty_task);
1594
1595         rc = jme_request_irq(jme);
1596         if (rc)
1597                 goto err_out;
1598
1599         jme_start_irq(jme);
1600
1601         if (test_bit(JME_FLAG_SSET, &jme->flags))
1602                 jme_set_settings(netdev, &jme->old_ecmd);
1603         else
1604                 jme_reset_phy_processor(jme);
1605
1606         jme_reset_link(jme);
1607
1608         return 0;
1609
1610 err_out:
1611         netif_stop_queue(netdev);
1612         netif_carrier_off(netdev);
1613         return rc;
1614 }
1615
1616 #ifdef CONFIG_PM
1617 static void
1618 jme_set_100m_half(struct jme_adapter *jme)
1619 {
1620         u32 bmcr, tmp;
1621
1622         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1623         tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1624                        BMCR_SPEED1000 | BMCR_FULLDPLX);
1625         tmp |= BMCR_SPEED100;
1626
1627         if (bmcr != tmp)
1628                 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1629
1630         if (jme->fpgaver)
1631                 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1632         else
1633                 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1634 }
1635
1636 #define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1637 static void
1638 jme_wait_link(struct jme_adapter *jme)
1639 {
1640         u32 phylink, to = JME_WAIT_LINK_TIME;
1641
1642         mdelay(1000);
1643         phylink = jme_linkstat_from_phy(jme);
1644         while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1645                 mdelay(10);
1646                 phylink = jme_linkstat_from_phy(jme);
1647         }
1648 }
1649 #endif
1650
1651 static inline void
1652 jme_phy_off(struct jme_adapter *jme)
1653 {
1654         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
1655 }
1656
1657 static int
1658 jme_close(struct net_device *netdev)
1659 {
1660         struct jme_adapter *jme = netdev_priv(netdev);
1661
1662         netif_stop_queue(netdev);
1663         netif_carrier_off(netdev);
1664
1665         jme_stop_irq(jme);
1666         jme_free_irq(jme);
1667
1668         JME_NAPI_DISABLE(jme);
1669
1670         tasklet_disable(&jme->linkch_task);
1671         tasklet_disable(&jme->txclean_task);
1672         tasklet_disable(&jme->rxclean_task);
1673         tasklet_disable(&jme->rxempty_task);
1674
1675         jme_reset_ghc_speed(jme);
1676         jme_disable_rx_engine(jme);
1677         jme_disable_tx_engine(jme);
1678         jme_reset_mac_processor(jme);
1679         jme_free_rx_resources(jme);
1680         jme_free_tx_resources(jme);
1681         jme->phylink = 0;
1682         jme_phy_off(jme);
1683
1684         return 0;
1685 }
1686
1687 static int
1688 jme_alloc_txdesc(struct jme_adapter *jme,
1689                         struct sk_buff *skb)
1690 {
1691         struct jme_ring *txring = &(jme->txring[0]);
1692         int idx, nr_alloc, mask = jme->tx_ring_mask;
1693
1694         idx = txring->next_to_use;
1695         nr_alloc = skb_shinfo(skb)->nr_frags + 2;
1696
1697         if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
1698                 return -1;
1699
1700         atomic_sub(nr_alloc, &txring->nr_free);
1701
1702         txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
1703
1704         return idx;
1705 }
1706
1707 static void
1708 jme_fill_tx_map(struct pci_dev *pdev,
1709                 struct txdesc *txdesc,
1710                 struct jme_buffer_info *txbi,
1711                 struct page *page,
1712                 u32 page_offset,
1713                 u32 len,
1714                 u8 hidma)
1715 {
1716         dma_addr_t dmaaddr;
1717
1718         dmaaddr = pci_map_page(pdev,
1719                                 page,
1720                                 page_offset,
1721                                 len,
1722                                 PCI_DMA_TODEVICE);
1723
1724         pci_dma_sync_single_for_device(pdev,
1725                                        dmaaddr,
1726                                        len,
1727                                        PCI_DMA_TODEVICE);
1728
1729         txdesc->dw[0] = 0;
1730         txdesc->dw[1] = 0;
1731         txdesc->desc2.flags     = TXFLAG_OWN;
1732         txdesc->desc2.flags     |= (hidma) ? TXFLAG_64BIT : 0;
1733         txdesc->desc2.datalen   = cpu_to_le16(len);
1734         txdesc->desc2.bufaddrh  = cpu_to_le32((__u64)dmaaddr >> 32);
1735         txdesc->desc2.bufaddrl  = cpu_to_le32(
1736                                         (__u64)dmaaddr & 0xFFFFFFFFUL);
1737
1738         txbi->mapping = dmaaddr;
1739         txbi->len = len;
1740 }
1741
1742 static void
1743 jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1744 {
1745         struct jme_ring *txring = &(jme->txring[0]);
1746         struct txdesc *txdesc = txring->desc, *ctxdesc;
1747         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
1748         u8 hidma = jme->dev->features & NETIF_F_HIGHDMA;
1749         int i, nr_frags = skb_shinfo(skb)->nr_frags;
1750         int mask = jme->tx_ring_mask;
1751         struct skb_frag_struct *frag;
1752         u32 len;
1753
1754         for (i = 0 ; i < nr_frags ; ++i) {
1755                 frag = &skb_shinfo(skb)->frags[i];
1756                 ctxdesc = txdesc + ((idx + i + 2) & (mask));
1757                 ctxbi = txbi + ((idx + i + 2) & (mask));
1758
1759                 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page,
1760                                  frag->page_offset, frag->size, hidma);
1761         }
1762
1763         len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
1764         ctxdesc = txdesc + ((idx + 1) & (mask));
1765         ctxbi = txbi + ((idx + 1) & (mask));
1766         jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
1767                         offset_in_page(skb->data), len, hidma);
1768
1769 }
1770
1771 static int
1772 jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
1773 {
1774         if (unlikely(skb_shinfo(skb)->gso_size &&
1775                         skb_header_cloned(skb) &&
1776                         pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
1777                 dev_kfree_skb(skb);
1778                 return -1;
1779         }
1780
1781         return 0;
1782 }
1783
1784 static int
1785 jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
1786 {
1787         *mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
1788         if (*mss) {
1789                 *flags |= TXFLAG_LSEN;
1790
1791                 if (skb->protocol == htons(ETH_P_IP)) {
1792                         struct iphdr *iph = ip_hdr(skb);
1793
1794                         iph->check = 0;
1795                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1796                                                                 iph->daddr, 0,
1797                                                                 IPPROTO_TCP,
1798                                                                 0);
1799                 } else {
1800                         struct ipv6hdr *ip6h = ipv6_hdr(skb);
1801
1802                         tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr,
1803                                                                 &ip6h->daddr, 0,
1804                                                                 IPPROTO_TCP,
1805                                                                 0);
1806                 }
1807
1808                 return 0;
1809         }
1810
1811         return 1;
1812 }
1813
1814 static void
1815 jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
1816 {
1817         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1818                 u8 ip_proto;
1819
1820                 switch (skb->protocol) {
1821                 case htons(ETH_P_IP):
1822                         ip_proto = ip_hdr(skb)->protocol;
1823                         break;
1824                 case htons(ETH_P_IPV6):
1825                         ip_proto = ipv6_hdr(skb)->nexthdr;
1826                         break;
1827                 default:
1828                         ip_proto = 0;
1829                         break;
1830                 }
1831
1832                 switch (ip_proto) {
1833                 case IPPROTO_TCP:
1834                         *flags |= TXFLAG_TCPCS;
1835                         break;
1836                 case IPPROTO_UDP:
1837                         *flags |= TXFLAG_UDPCS;
1838                         break;
1839                 default:
1840                         netif_err(jme, tx_err, jme->dev, "Error upper layer protocol.\n");
1841                         break;
1842                 }
1843         }
1844 }
1845
1846 static inline void
1847 jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
1848 {
1849         if (vlan_tx_tag_present(skb)) {
1850                 *flags |= TXFLAG_TAGON;
1851                 *vlan = cpu_to_le16(vlan_tx_tag_get(skb));
1852         }
1853 }
1854
1855 static int
1856 jme_fill_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1857 {
1858         struct jme_ring *txring = &(jme->txring[0]);
1859         struct txdesc *txdesc;
1860         struct jme_buffer_info *txbi;
1861         u8 flags;
1862
1863         txdesc = (struct txdesc *)txring->desc + idx;
1864         txbi = txring->bufinf + idx;
1865
1866         txdesc->dw[0] = 0;
1867         txdesc->dw[1] = 0;
1868         txdesc->dw[2] = 0;
1869         txdesc->dw[3] = 0;
1870         txdesc->desc1.pktsize = cpu_to_le16(skb->len);
1871         /*
1872          * Set OWN bit at final.
1873          * When kernel transmit faster than NIC.
1874          * And NIC trying to send this descriptor before we tell
1875          * it to start sending this TX queue.
1876          * Other fields are already filled correctly.
1877          */
1878         wmb();
1879         flags = TXFLAG_OWN | TXFLAG_INT;
1880         /*
1881          * Set checksum flags while not tso
1882          */
1883         if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
1884                 jme_tx_csum(jme, skb, &flags);
1885         jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
1886         jme_map_tx_skb(jme, skb, idx);
1887         txdesc->desc1.flags = flags;
1888         /*
1889          * Set tx buffer info after telling NIC to send
1890          * For better tx_clean timing
1891          */
1892         wmb();
1893         txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
1894         txbi->skb = skb;
1895         txbi->len = skb->len;
1896         txbi->start_xmit = jiffies;
1897         if (!txbi->start_xmit)
1898                 txbi->start_xmit = (0UL-1);
1899
1900         return 0;
1901 }
1902
1903 static void
1904 jme_stop_queue_if_full(struct jme_adapter *jme)
1905 {
1906         struct jme_ring *txring = &(jme->txring[0]);
1907         struct jme_buffer_info *txbi = txring->bufinf;
1908         int idx = atomic_read(&txring->next_to_clean);
1909
1910         txbi += idx;
1911
1912         smp_wmb();
1913         if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
1914                 netif_stop_queue(jme->dev);
1915                 netif_info(jme, tx_queued, jme->dev, "TX Queue Paused.\n");
1916                 smp_wmb();
1917                 if (atomic_read(&txring->nr_free)
1918                         >= (jme->tx_wake_threshold)) {
1919                         netif_wake_queue(jme->dev);
1920                         netif_info(jme, tx_queued, jme->dev, "TX Queue Fast Waked.\n");
1921                 }
1922         }
1923
1924         if (unlikely(txbi->start_xmit &&
1925                         (jiffies - txbi->start_xmit) >= TX_TIMEOUT &&
1926                         txbi->skb)) {
1927                 netif_stop_queue(jme->dev);
1928                 netif_info(jme, tx_queued, jme->dev, "TX Queue Stopped %d@%lu.\n", idx, jiffies);
1929         }
1930 }
1931
1932 /*
1933  * This function is already protected by netif_tx_lock()
1934  */
1935
1936 static netdev_tx_t
1937 jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
1938 {
1939         struct jme_adapter *jme = netdev_priv(netdev);
1940         int idx;
1941
1942         if (unlikely(jme_expand_header(jme, skb))) {
1943                 ++(NET_STAT(jme).tx_dropped);
1944                 return NETDEV_TX_OK;
1945         }
1946
1947         idx = jme_alloc_txdesc(jme, skb);
1948
1949         if (unlikely(idx < 0)) {
1950                 netif_stop_queue(netdev);
1951                 netif_err(jme, tx_err, jme->dev, "BUG! Tx ring full when queue awake!\n");
1952
1953                 return NETDEV_TX_BUSY;
1954         }
1955
1956         jme_fill_tx_desc(jme, skb, idx);
1957
1958         jwrite32(jme, JME_TXCS, jme->reg_txcs |
1959                                 TXCS_SELECT_QUEUE0 |
1960                                 TXCS_QUEUE0S |
1961                                 TXCS_ENABLE);
1962
1963         tx_dbg(jme, "xmit: %d+%d@%lu\n", idx,
1964                         skb_shinfo(skb)->nr_frags + 2,
1965                         jiffies);
1966         jme_stop_queue_if_full(jme);
1967
1968         return NETDEV_TX_OK;
1969 }
1970
1971 static int
1972 jme_set_macaddr(struct net_device *netdev, void *p)
1973 {
1974         struct jme_adapter *jme = netdev_priv(netdev);
1975         struct sockaddr *addr = p;
1976         u32 val;
1977
1978         if (netif_running(netdev))
1979                 return -EBUSY;
1980
1981         spin_lock_bh(&jme->macaddr_lock);
1982         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1983
1984         val = (addr->sa_data[3] & 0xff) << 24 |
1985               (addr->sa_data[2] & 0xff) << 16 |
1986               (addr->sa_data[1] & 0xff) <<  8 |
1987               (addr->sa_data[0] & 0xff);
1988         jwrite32(jme, JME_RXUMA_LO, val);
1989         val = (addr->sa_data[5] & 0xff) << 8 |
1990               (addr->sa_data[4] & 0xff);
1991         jwrite32(jme, JME_RXUMA_HI, val);
1992         spin_unlock_bh(&jme->macaddr_lock);
1993
1994         return 0;
1995 }
1996
1997 static void
1998 jme_set_multi(struct net_device *netdev)
1999 {
2000         struct jme_adapter *jme = netdev_priv(netdev);
2001         u32 mc_hash[2] = {};
2002
2003         spin_lock_bh(&jme->rxmcs_lock);
2004
2005         jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
2006
2007         if (netdev->flags & IFF_PROMISC) {
2008                 jme->reg_rxmcs |= RXMCS_ALLFRAME;
2009         } else if (netdev->flags & IFF_ALLMULTI) {
2010                 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
2011         } else if (netdev->flags & IFF_MULTICAST) {
2012                 struct dev_mc_list *mclist;
2013                 int bit_nr;
2014
2015                 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
2016                 netdev_for_each_mc_addr(mclist, netdev) {
2017                         bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3F;
2018                         mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
2019                 }
2020
2021                 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
2022                 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
2023         }
2024
2025         wmb();
2026         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2027
2028         spin_unlock_bh(&jme->rxmcs_lock);
2029 }
2030
2031 static int
2032 jme_change_mtu(struct net_device *netdev, int new_mtu)
2033 {
2034         struct jme_adapter *jme = netdev_priv(netdev);
2035
2036         if (new_mtu == jme->old_mtu)
2037                 return 0;
2038
2039         if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
2040                 ((new_mtu) < IPV6_MIN_MTU))
2041                 return -EINVAL;
2042
2043         if (new_mtu > 4000) {
2044                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2045                 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
2046                 jme_restart_rx_engine(jme);
2047         } else {
2048                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2049                 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
2050                 jme_restart_rx_engine(jme);
2051         }
2052
2053         if (new_mtu > 1900) {
2054                 netdev->features &= ~(NETIF_F_HW_CSUM |
2055                                 NETIF_F_TSO |
2056                                 NETIF_F_TSO6);
2057         } else {
2058                 if (test_bit(JME_FLAG_TXCSUM, &jme->flags))
2059                         netdev->features |= NETIF_F_HW_CSUM;
2060                 if (test_bit(JME_FLAG_TSO, &jme->flags))
2061                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2062         }
2063
2064         netdev->mtu = new_mtu;
2065         jme_reset_link(jme);
2066
2067         return 0;
2068 }
2069
2070 static void
2071 jme_tx_timeout(struct net_device *netdev)
2072 {
2073         struct jme_adapter *jme = netdev_priv(netdev);
2074
2075         jme->phylink = 0;
2076         jme_reset_phy_processor(jme);
2077         if (test_bit(JME_FLAG_SSET, &jme->flags))
2078                 jme_set_settings(netdev, &jme->old_ecmd);
2079
2080         /*
2081          * Force to Reset the link again
2082          */
2083         jme_reset_link(jme);
2084 }
2085
2086 static inline void jme_pause_rx(struct jme_adapter *jme)
2087 {
2088         atomic_dec(&jme->link_changing);
2089
2090         jme_set_rx_pcc(jme, PCC_OFF);
2091         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2092                 JME_NAPI_DISABLE(jme);
2093         } else {
2094                 tasklet_disable(&jme->rxclean_task);
2095                 tasklet_disable(&jme->rxempty_task);
2096         }
2097 }
2098
2099 static inline void jme_resume_rx(struct jme_adapter *jme)
2100 {
2101         struct dynpcc_info *dpi = &(jme->dpi);
2102
2103         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2104                 JME_NAPI_ENABLE(jme);
2105         } else {
2106                 tasklet_hi_enable(&jme->rxclean_task);
2107                 tasklet_hi_enable(&jme->rxempty_task);
2108         }
2109         dpi->cur                = PCC_P1;
2110         dpi->attempt            = PCC_P1;
2111         dpi->cnt                = 0;
2112         jme_set_rx_pcc(jme, PCC_P1);
2113
2114         atomic_inc(&jme->link_changing);
2115 }
2116
2117 static void
2118 jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2119 {
2120         struct jme_adapter *jme = netdev_priv(netdev);
2121
2122         jme_pause_rx(jme);
2123         jme->vlgrp = grp;
2124         jme_resume_rx(jme);
2125 }
2126
2127 static void
2128 jme_get_drvinfo(struct net_device *netdev,
2129                      struct ethtool_drvinfo *info)
2130 {
2131         struct jme_adapter *jme = netdev_priv(netdev);
2132
2133         strcpy(info->driver, DRV_NAME);
2134         strcpy(info->version, DRV_VERSION);
2135         strcpy(info->bus_info, pci_name(jme->pdev));
2136 }
2137
2138 static int
2139 jme_get_regs_len(struct net_device *netdev)
2140 {
2141         return JME_REG_LEN;
2142 }
2143
2144 static void
2145 mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2146 {
2147         int i;
2148
2149         for (i = 0 ; i < len ; i += 4)
2150                 p[i >> 2] = jread32(jme, reg + i);
2151 }
2152
2153 static void
2154 mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2155 {
2156         int i;
2157         u16 *p16 = (u16 *)p;
2158
2159         for (i = 0 ; i < reg_nr ; ++i)
2160                 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2161 }
2162
2163 static void
2164 jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2165 {
2166         struct jme_adapter *jme = netdev_priv(netdev);
2167         u32 *p32 = (u32 *)p;
2168
2169         memset(p, 0xFF, JME_REG_LEN);
2170
2171         regs->version = 1;
2172         mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2173
2174         p32 += 0x100 >> 2;
2175         mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2176
2177         p32 += 0x100 >> 2;
2178         mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2179
2180         p32 += 0x100 >> 2;
2181         mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2182
2183         p32 += 0x100 >> 2;
2184         mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2185 }
2186
2187 static int
2188 jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2189 {
2190         struct jme_adapter *jme = netdev_priv(netdev);
2191
2192         ecmd->tx_coalesce_usecs = PCC_TX_TO;
2193         ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2194
2195         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2196                 ecmd->use_adaptive_rx_coalesce = false;
2197                 ecmd->rx_coalesce_usecs = 0;
2198                 ecmd->rx_max_coalesced_frames = 0;
2199                 return 0;
2200         }
2201
2202         ecmd->use_adaptive_rx_coalesce = true;
2203
2204         switch (jme->dpi.cur) {
2205         case PCC_P1:
2206                 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2207                 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2208                 break;
2209         case PCC_P2:
2210                 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2211                 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2212                 break;
2213         case PCC_P3:
2214                 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2215                 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2216                 break;
2217         default:
2218                 break;
2219         }
2220
2221         return 0;
2222 }
2223
2224 static int
2225 jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2226 {
2227         struct jme_adapter *jme = netdev_priv(netdev);
2228         struct dynpcc_info *dpi = &(jme->dpi);
2229
2230         if (netif_running(netdev))
2231                 return -EBUSY;
2232
2233         if (ecmd->use_adaptive_rx_coalesce &&
2234             test_bit(JME_FLAG_POLL, &jme->flags)) {
2235                 clear_bit(JME_FLAG_POLL, &jme->flags);
2236                 jme->jme_rx = netif_rx;
2237                 jme->jme_vlan_rx = vlan_hwaccel_rx;
2238                 dpi->cur                = PCC_P1;
2239                 dpi->attempt            = PCC_P1;
2240                 dpi->cnt                = 0;
2241                 jme_set_rx_pcc(jme, PCC_P1);
2242                 jme_interrupt_mode(jme);
2243         } else if (!(ecmd->use_adaptive_rx_coalesce) &&
2244                    !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2245                 set_bit(JME_FLAG_POLL, &jme->flags);
2246                 jme->jme_rx = netif_receive_skb;
2247                 jme->jme_vlan_rx = vlan_hwaccel_receive_skb;
2248                 jme_interrupt_mode(jme);
2249         }
2250
2251         return 0;
2252 }
2253
2254 static void
2255 jme_get_pauseparam(struct net_device *netdev,
2256                         struct ethtool_pauseparam *ecmd)
2257 {
2258         struct jme_adapter *jme = netdev_priv(netdev);
2259         u32 val;
2260
2261         ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2262         ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2263
2264         spin_lock_bh(&jme->phy_lock);
2265         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2266         spin_unlock_bh(&jme->phy_lock);
2267
2268         ecmd->autoneg =
2269                 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2270 }
2271
2272 static int
2273 jme_set_pauseparam(struct net_device *netdev,
2274                         struct ethtool_pauseparam *ecmd)
2275 {
2276         struct jme_adapter *jme = netdev_priv(netdev);
2277         u32 val;
2278
2279         if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2280                 (ecmd->tx_pause != 0)) {
2281
2282                 if (ecmd->tx_pause)
2283                         jme->reg_txpfc |= TXPFC_PF_EN;
2284                 else
2285                         jme->reg_txpfc &= ~TXPFC_PF_EN;
2286
2287                 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2288         }
2289
2290         spin_lock_bh(&jme->rxmcs_lock);
2291         if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2292                 (ecmd->rx_pause != 0)) {
2293
2294                 if (ecmd->rx_pause)
2295                         jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2296                 else
2297                         jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2298
2299                 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2300         }
2301         spin_unlock_bh(&jme->rxmcs_lock);
2302
2303         spin_lock_bh(&jme->phy_lock);
2304         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2305         if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2306                 (ecmd->autoneg != 0)) {
2307
2308                 if (ecmd->autoneg)
2309                         val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2310                 else
2311                         val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2312
2313                 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2314                                 MII_ADVERTISE, val);
2315         }
2316         spin_unlock_bh(&jme->phy_lock);
2317
2318         return 0;
2319 }
2320
2321 static void
2322 jme_get_wol(struct net_device *netdev,
2323                 struct ethtool_wolinfo *wol)
2324 {
2325         struct jme_adapter *jme = netdev_priv(netdev);
2326
2327         wol->supported = WAKE_MAGIC | WAKE_PHY;
2328
2329         wol->wolopts = 0;
2330
2331         if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2332                 wol->wolopts |= WAKE_PHY;
2333
2334         if (jme->reg_pmcs & PMCS_MFEN)
2335                 wol->wolopts |= WAKE_MAGIC;
2336
2337 }
2338
2339 static int
2340 jme_set_wol(struct net_device *netdev,
2341                 struct ethtool_wolinfo *wol)
2342 {
2343         struct jme_adapter *jme = netdev_priv(netdev);
2344
2345         if (wol->wolopts & (WAKE_MAGICSECURE |
2346                                 WAKE_UCAST |
2347                                 WAKE_MCAST |
2348                                 WAKE_BCAST |
2349                                 WAKE_ARP))
2350                 return -EOPNOTSUPP;
2351
2352         jme->reg_pmcs = 0;
2353
2354         if (wol->wolopts & WAKE_PHY)
2355                 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2356
2357         if (wol->wolopts & WAKE_MAGIC)
2358                 jme->reg_pmcs |= PMCS_MFEN;
2359
2360         jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2361
2362         return 0;
2363 }
2364
2365 static int
2366 jme_get_settings(struct net_device *netdev,
2367                      struct ethtool_cmd *ecmd)
2368 {
2369         struct jme_adapter *jme = netdev_priv(netdev);
2370         int rc;
2371
2372         spin_lock_bh(&jme->phy_lock);
2373         rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2374         spin_unlock_bh(&jme->phy_lock);
2375         return rc;
2376 }
2377
2378 static int
2379 jme_set_settings(struct net_device *netdev,
2380                      struct ethtool_cmd *ecmd)
2381 {
2382         struct jme_adapter *jme = netdev_priv(netdev);
2383         int rc, fdc = 0;
2384
2385         if (ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE)
2386                 return -EINVAL;
2387
2388         if (jme->mii_if.force_media &&
2389         ecmd->autoneg != AUTONEG_ENABLE &&
2390         (jme->mii_if.full_duplex != ecmd->duplex))
2391                 fdc = 1;
2392
2393         spin_lock_bh(&jme->phy_lock);
2394         rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2395         spin_unlock_bh(&jme->phy_lock);
2396
2397         if (!rc && fdc)
2398                 jme_reset_link(jme);
2399
2400         if (!rc) {
2401                 set_bit(JME_FLAG_SSET, &jme->flags);
2402                 jme->old_ecmd = *ecmd;
2403         }
2404
2405         return rc;
2406 }
2407
2408 static u32
2409 jme_get_link(struct net_device *netdev)
2410 {
2411         struct jme_adapter *jme = netdev_priv(netdev);
2412         return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2413 }
2414
2415 static u32
2416 jme_get_msglevel(struct net_device *netdev)
2417 {
2418         struct jme_adapter *jme = netdev_priv(netdev);
2419         return jme->msg_enable;
2420 }
2421
2422 static void
2423 jme_set_msglevel(struct net_device *netdev, u32 value)
2424 {
2425         struct jme_adapter *jme = netdev_priv(netdev);
2426         jme->msg_enable = value;
2427 }
2428
2429 static u32
2430 jme_get_rx_csum(struct net_device *netdev)
2431 {
2432         struct jme_adapter *jme = netdev_priv(netdev);
2433         return jme->reg_rxmcs & RXMCS_CHECKSUM;
2434 }
2435
2436 static int
2437 jme_set_rx_csum(struct net_device *netdev, u32 on)
2438 {
2439         struct jme_adapter *jme = netdev_priv(netdev);
2440
2441         spin_lock_bh(&jme->rxmcs_lock);
2442         if (on)
2443                 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2444         else
2445                 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2446         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2447         spin_unlock_bh(&jme->rxmcs_lock);
2448
2449         return 0;
2450 }
2451
2452 static int
2453 jme_set_tx_csum(struct net_device *netdev, u32 on)
2454 {
2455         struct jme_adapter *jme = netdev_priv(netdev);
2456
2457         if (on) {
2458                 set_bit(JME_FLAG_TXCSUM, &jme->flags);
2459                 if (netdev->mtu <= 1900)
2460                         netdev->features |= NETIF_F_HW_CSUM;
2461         } else {
2462                 clear_bit(JME_FLAG_TXCSUM, &jme->flags);
2463                 netdev->features &= ~NETIF_F_HW_CSUM;
2464         }
2465
2466         return 0;
2467 }
2468
2469 static int
2470 jme_set_tso(struct net_device *netdev, u32 on)
2471 {
2472         struct jme_adapter *jme = netdev_priv(netdev);
2473
2474         if (on) {
2475                 set_bit(JME_FLAG_TSO, &jme->flags);
2476                 if (netdev->mtu <= 1900)
2477                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2478         } else {
2479                 clear_bit(JME_FLAG_TSO, &jme->flags);
2480                 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
2481         }
2482
2483         return 0;
2484 }
2485
2486 static int
2487 jme_nway_reset(struct net_device *netdev)
2488 {
2489         struct jme_adapter *jme = netdev_priv(netdev);
2490         jme_restart_an(jme);
2491         return 0;
2492 }
2493
2494 static u8
2495 jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2496 {
2497         u32 val;
2498         int to;
2499
2500         val = jread32(jme, JME_SMBCSR);
2501         to = JME_SMB_BUSY_TIMEOUT;
2502         while ((val & SMBCSR_BUSY) && --to) {
2503                 msleep(1);
2504                 val = jread32(jme, JME_SMBCSR);
2505         }
2506         if (!to) {
2507                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2508                 return 0xFF;
2509         }
2510
2511         jwrite32(jme, JME_SMBINTF,
2512                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2513                 SMBINTF_HWRWN_READ |
2514                 SMBINTF_HWCMD);
2515
2516         val = jread32(jme, JME_SMBINTF);
2517         to = JME_SMB_BUSY_TIMEOUT;
2518         while ((val & SMBINTF_HWCMD) && --to) {
2519                 msleep(1);
2520                 val = jread32(jme, JME_SMBINTF);
2521         }
2522         if (!to) {
2523                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2524                 return 0xFF;
2525         }
2526
2527         return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2528 }
2529
2530 static void
2531 jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2532 {
2533         u32 val;
2534         int to;
2535
2536         val = jread32(jme, JME_SMBCSR);
2537         to = JME_SMB_BUSY_TIMEOUT;
2538         while ((val & SMBCSR_BUSY) && --to) {
2539                 msleep(1);
2540                 val = jread32(jme, JME_SMBCSR);
2541         }
2542         if (!to) {
2543                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2544                 return;
2545         }
2546
2547         jwrite32(jme, JME_SMBINTF,
2548                 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2549                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2550                 SMBINTF_HWRWN_WRITE |
2551                 SMBINTF_HWCMD);
2552
2553         val = jread32(jme, JME_SMBINTF);
2554         to = JME_SMB_BUSY_TIMEOUT;
2555         while ((val & SMBINTF_HWCMD) && --to) {
2556                 msleep(1);
2557                 val = jread32(jme, JME_SMBINTF);
2558         }
2559         if (!to) {
2560                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2561                 return;
2562         }
2563
2564         mdelay(2);
2565 }
2566
2567 static int
2568 jme_get_eeprom_len(struct net_device *netdev)
2569 {
2570         struct jme_adapter *jme = netdev_priv(netdev);
2571         u32 val;
2572         val = jread32(jme, JME_SMBCSR);
2573         return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2574 }
2575
2576 static int
2577 jme_get_eeprom(struct net_device *netdev,
2578                 struct ethtool_eeprom *eeprom, u8 *data)
2579 {
2580         struct jme_adapter *jme = netdev_priv(netdev);
2581         int i, offset = eeprom->offset, len = eeprom->len;
2582
2583         /*
2584          * ethtool will check the boundary for us
2585          */
2586         eeprom->magic = JME_EEPROM_MAGIC;
2587         for (i = 0 ; i < len ; ++i)
2588                 data[i] = jme_smb_read(jme, i + offset);
2589
2590         return 0;
2591 }
2592
2593 static int
2594 jme_set_eeprom(struct net_device *netdev,
2595                 struct ethtool_eeprom *eeprom, u8 *data)
2596 {
2597         struct jme_adapter *jme = netdev_priv(netdev);
2598         int i, offset = eeprom->offset, len = eeprom->len;
2599
2600         if (eeprom->magic != JME_EEPROM_MAGIC)
2601                 return -EINVAL;
2602
2603         /*
2604          * ethtool will check the boundary for us
2605          */
2606         for (i = 0 ; i < len ; ++i)
2607                 jme_smb_write(jme, i + offset, data[i]);
2608
2609         return 0;
2610 }
2611
2612 static const struct ethtool_ops jme_ethtool_ops = {
2613         .get_drvinfo            = jme_get_drvinfo,
2614         .get_regs_len           = jme_get_regs_len,
2615         .get_regs               = jme_get_regs,
2616         .get_coalesce           = jme_get_coalesce,
2617         .set_coalesce           = jme_set_coalesce,
2618         .get_pauseparam         = jme_get_pauseparam,
2619         .set_pauseparam         = jme_set_pauseparam,
2620         .get_wol                = jme_get_wol,
2621         .set_wol                = jme_set_wol,
2622         .get_settings           = jme_get_settings,
2623         .set_settings           = jme_set_settings,
2624         .get_link               = jme_get_link,
2625         .get_msglevel           = jme_get_msglevel,
2626         .set_msglevel           = jme_set_msglevel,
2627         .get_rx_csum            = jme_get_rx_csum,
2628         .set_rx_csum            = jme_set_rx_csum,
2629         .set_tx_csum            = jme_set_tx_csum,
2630         .set_tso                = jme_set_tso,
2631         .set_sg                 = ethtool_op_set_sg,
2632         .nway_reset             = jme_nway_reset,
2633         .get_eeprom_len         = jme_get_eeprom_len,
2634         .get_eeprom             = jme_get_eeprom,
2635         .set_eeprom             = jme_set_eeprom,
2636 };
2637
2638 static int
2639 jme_pci_dma64(struct pci_dev *pdev)
2640 {
2641         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2642             !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
2643                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
2644                         return 1;
2645
2646         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2647             !pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
2648                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)))
2649                         return 1;
2650
2651         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
2652                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2653                         return 0;
2654
2655         return -1;
2656 }
2657
2658 static inline void
2659 jme_phy_init(struct jme_adapter *jme)
2660 {
2661         u16 reg26;
2662
2663         reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2664         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2665 }
2666
2667 static inline void
2668 jme_check_hw_ver(struct jme_adapter *jme)
2669 {
2670         u32 chipmode;
2671
2672         chipmode = jread32(jme, JME_CHIPMODE);
2673
2674         jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2675         jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2676 }
2677
2678 static const struct net_device_ops jme_netdev_ops = {
2679         .ndo_open               = jme_open,
2680         .ndo_stop               = jme_close,
2681         .ndo_validate_addr      = eth_validate_addr,
2682         .ndo_start_xmit         = jme_start_xmit,
2683         .ndo_set_mac_address    = jme_set_macaddr,
2684         .ndo_set_multicast_list = jme_set_multi,
2685         .ndo_change_mtu         = jme_change_mtu,
2686         .ndo_tx_timeout         = jme_tx_timeout,
2687         .ndo_vlan_rx_register   = jme_vlan_rx_register,
2688 };
2689
2690 static int __devinit
2691 jme_init_one(struct pci_dev *pdev,
2692              const struct pci_device_id *ent)
2693 {
2694         int rc = 0, using_dac, i;
2695         struct net_device *netdev;
2696         struct jme_adapter *jme;
2697         u16 bmcr, bmsr;
2698         u32 apmc;
2699
2700         /*
2701          * set up PCI device basics
2702          */
2703         rc = pci_enable_device(pdev);
2704         if (rc) {
2705                 jeprintk(pdev, "Cannot enable PCI device.\n");
2706                 goto err_out;
2707         }
2708
2709         using_dac = jme_pci_dma64(pdev);
2710         if (using_dac < 0) {
2711                 jeprintk(pdev, "Cannot set PCI DMA Mask.\n");
2712                 rc = -EIO;
2713                 goto err_out_disable_pdev;
2714         }
2715
2716         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2717                 jeprintk(pdev, "No PCI resource region found.\n");
2718                 rc = -ENOMEM;
2719                 goto err_out_disable_pdev;
2720         }
2721
2722         rc = pci_request_regions(pdev, DRV_NAME);
2723         if (rc) {
2724                 jeprintk(pdev, "Cannot obtain PCI resource region.\n");
2725                 goto err_out_disable_pdev;
2726         }
2727
2728         pci_set_master(pdev);
2729
2730         /*
2731          * alloc and init net device
2732          */
2733         netdev = alloc_etherdev(sizeof(*jme));
2734         if (!netdev) {
2735                 jeprintk(pdev, "Cannot allocate netdev structure.\n");
2736                 rc = -ENOMEM;
2737                 goto err_out_release_regions;
2738         }
2739         netdev->netdev_ops = &jme_netdev_ops;
2740         netdev->ethtool_ops             = &jme_ethtool_ops;
2741         netdev->watchdog_timeo          = TX_TIMEOUT;
2742         netdev->features                =       NETIF_F_HW_CSUM |
2743                                                 NETIF_F_SG |
2744                                                 NETIF_F_TSO |
2745                                                 NETIF_F_TSO6 |
2746                                                 NETIF_F_HW_VLAN_TX |
2747                                                 NETIF_F_HW_VLAN_RX;
2748         if (using_dac)
2749                 netdev->features        |=      NETIF_F_HIGHDMA;
2750
2751         SET_NETDEV_DEV(netdev, &pdev->dev);
2752         pci_set_drvdata(pdev, netdev);
2753
2754         /*
2755          * init adapter info
2756          */
2757         jme = netdev_priv(netdev);
2758         jme->pdev = pdev;
2759         jme->dev = netdev;
2760         jme->jme_rx = netif_rx;
2761         jme->jme_vlan_rx = vlan_hwaccel_rx;
2762         jme->old_mtu = netdev->mtu = 1500;
2763         jme->phylink = 0;
2764         jme->tx_ring_size = 1 << 10;
2765         jme->tx_ring_mask = jme->tx_ring_size - 1;
2766         jme->tx_wake_threshold = 1 << 9;
2767         jme->rx_ring_size = 1 << 9;
2768         jme->rx_ring_mask = jme->rx_ring_size - 1;
2769         jme->msg_enable = JME_DEF_MSG_ENABLE;
2770         jme->regs = ioremap(pci_resource_start(pdev, 0),
2771                              pci_resource_len(pdev, 0));
2772         if (!(jme->regs)) {
2773                 jeprintk(pdev, "Mapping PCI resource region error.\n");
2774                 rc = -ENOMEM;
2775                 goto err_out_free_netdev;
2776         }
2777
2778         if (no_pseudohp) {
2779                 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2780                 jwrite32(jme, JME_APMC, apmc);
2781         } else if (force_pseudohp) {
2782                 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2783                 jwrite32(jme, JME_APMC, apmc);
2784         }
2785
2786         NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2787
2788         spin_lock_init(&jme->phy_lock);
2789         spin_lock_init(&jme->macaddr_lock);
2790         spin_lock_init(&jme->rxmcs_lock);
2791
2792         atomic_set(&jme->link_changing, 1);
2793         atomic_set(&jme->rx_cleaning, 1);
2794         atomic_set(&jme->tx_cleaning, 1);
2795         atomic_set(&jme->rx_empty, 1);
2796
2797         tasklet_init(&jme->pcc_task,
2798                      jme_pcc_tasklet,
2799                      (unsigned long) jme);
2800         tasklet_init(&jme->linkch_task,
2801                      jme_link_change_tasklet,
2802                      (unsigned long) jme);
2803         tasklet_init(&jme->txclean_task,
2804                      jme_tx_clean_tasklet,
2805                      (unsigned long) jme);
2806         tasklet_init(&jme->rxclean_task,
2807                      jme_rx_clean_tasklet,
2808                      (unsigned long) jme);
2809         tasklet_init(&jme->rxempty_task,
2810                      jme_rx_empty_tasklet,
2811                      (unsigned long) jme);
2812         tasklet_disable_nosync(&jme->linkch_task);
2813         tasklet_disable_nosync(&jme->txclean_task);
2814         tasklet_disable_nosync(&jme->rxclean_task);
2815         tasklet_disable_nosync(&jme->rxempty_task);
2816         jme->dpi.cur = PCC_P1;
2817
2818         jme->reg_ghc = 0;
2819         jme->reg_rxcs = RXCS_DEFAULT;
2820         jme->reg_rxmcs = RXMCS_DEFAULT;
2821         jme->reg_txpfc = 0;
2822         jme->reg_pmcs = PMCS_MFEN;
2823         set_bit(JME_FLAG_TXCSUM, &jme->flags);
2824         set_bit(JME_FLAG_TSO, &jme->flags);
2825
2826         /*
2827          * Get Max Read Req Size from PCI Config Space
2828          */
2829         pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
2830         jme->mrrs &= PCI_DCSR_MRRS_MASK;
2831         switch (jme->mrrs) {
2832         case MRRS_128B:
2833                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
2834                 break;
2835         case MRRS_256B:
2836                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
2837                 break;
2838         default:
2839                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
2840                 break;
2841         };
2842
2843         /*
2844          * Must check before reset_mac_processor
2845          */
2846         jme_check_hw_ver(jme);
2847         jme->mii_if.dev = netdev;
2848         if (jme->fpgaver) {
2849                 jme->mii_if.phy_id = 0;
2850                 for (i = 1 ; i < 32 ; ++i) {
2851                         bmcr = jme_mdio_read(netdev, i, MII_BMCR);
2852                         bmsr = jme_mdio_read(netdev, i, MII_BMSR);
2853                         if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
2854                                 jme->mii_if.phy_id = i;
2855                                 break;
2856                         }
2857                 }
2858
2859                 if (!jme->mii_if.phy_id) {
2860                         rc = -EIO;
2861                         jeprintk(pdev, "Can not find phy_id.\n");
2862                          goto err_out_unmap;
2863                 }
2864
2865                 jme->reg_ghc |= GHC_LINK_POLL;
2866         } else {
2867                 jme->mii_if.phy_id = 1;
2868         }
2869         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
2870                 jme->mii_if.supports_gmii = true;
2871         else
2872                 jme->mii_if.supports_gmii = false;
2873         jme->mii_if.mdio_read = jme_mdio_read;
2874         jme->mii_if.mdio_write = jme_mdio_write;
2875
2876         jme_clear_pm(jme);
2877         jme_set_phyfifoa(jme);
2878         pci_read_config_byte(pdev, PCI_REVISION_ID, &jme->rev);
2879         if (!jme->fpgaver)
2880                 jme_phy_init(jme);
2881         jme_phy_off(jme);
2882
2883         /*
2884          * Reset MAC processor and reload EEPROM for MAC Address
2885          */
2886         jme_reset_mac_processor(jme);
2887         rc = jme_reload_eeprom(jme);
2888         if (rc) {
2889                 jeprintk(pdev,
2890                         "Reload eeprom for reading MAC Address error.\n");
2891                 goto err_out_unmap;
2892         }
2893         jme_load_macaddr(netdev);
2894
2895         /*
2896          * Tell stack that we are not ready to work until open()
2897          */
2898         netif_carrier_off(netdev);
2899         netif_stop_queue(netdev);
2900
2901         /*
2902          * Register netdev
2903          */
2904         rc = register_netdev(netdev);
2905         if (rc) {
2906                 jeprintk(pdev, "Cannot register net device.\n");
2907                 goto err_out_unmap;
2908         }
2909
2910         netif_info(jme, probe, jme->dev, "%s%s ver:%x rev:%x macaddr:%pM\n",
2911                    (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
2912                    "JMC250 Gigabit Ethernet" :
2913                    (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
2914                    "JMC260 Fast Ethernet" : "Unknown",
2915                    (jme->fpgaver != 0) ? " (FPGA)" : "",
2916                    (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
2917                    jme->rev, netdev->dev_addr);
2918
2919         return 0;
2920
2921 err_out_unmap:
2922         iounmap(jme->regs);
2923 err_out_free_netdev:
2924         pci_set_drvdata(pdev, NULL);
2925         free_netdev(netdev);
2926 err_out_release_regions:
2927         pci_release_regions(pdev);
2928 err_out_disable_pdev:
2929         pci_disable_device(pdev);
2930 err_out:
2931         return rc;
2932 }
2933
2934 static void __devexit
2935 jme_remove_one(struct pci_dev *pdev)
2936 {
2937         struct net_device *netdev = pci_get_drvdata(pdev);
2938         struct jme_adapter *jme = netdev_priv(netdev);
2939
2940         unregister_netdev(netdev);
2941         iounmap(jme->regs);
2942         pci_set_drvdata(pdev, NULL);
2943         free_netdev(netdev);
2944         pci_release_regions(pdev);
2945         pci_disable_device(pdev);
2946
2947 }
2948
2949 #ifdef CONFIG_PM
2950 static int
2951 jme_suspend(struct pci_dev *pdev, pm_message_t state)
2952 {
2953         struct net_device *netdev = pci_get_drvdata(pdev);
2954         struct jme_adapter *jme = netdev_priv(netdev);
2955
2956         atomic_dec(&jme->link_changing);
2957
2958         netif_device_detach(netdev);
2959         netif_stop_queue(netdev);
2960         jme_stop_irq(jme);
2961
2962         tasklet_disable(&jme->txclean_task);
2963         tasklet_disable(&jme->rxclean_task);
2964         tasklet_disable(&jme->rxempty_task);
2965
2966         if (netif_carrier_ok(netdev)) {
2967                 if (test_bit(JME_FLAG_POLL, &jme->flags))
2968                         jme_polling_mode(jme);
2969
2970                 jme_stop_pcc_timer(jme);
2971                 jme_reset_ghc_speed(jme);
2972                 jme_disable_rx_engine(jme);
2973                 jme_disable_tx_engine(jme);
2974                 jme_reset_mac_processor(jme);
2975                 jme_free_rx_resources(jme);
2976                 jme_free_tx_resources(jme);
2977                 netif_carrier_off(netdev);
2978                 jme->phylink = 0;
2979         }
2980
2981         tasklet_enable(&jme->txclean_task);
2982         tasklet_hi_enable(&jme->rxclean_task);
2983         tasklet_hi_enable(&jme->rxempty_task);
2984
2985         pci_save_state(pdev);
2986         if (jme->reg_pmcs) {
2987                 jme_set_100m_half(jme);
2988
2989                 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2990                         jme_wait_link(jme);
2991
2992                 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2993
2994                 pci_enable_wake(pdev, PCI_D3cold, true);
2995         } else {
2996                 jme_phy_off(jme);
2997         }
2998         pci_set_power_state(pdev, PCI_D3cold);
2999
3000         return 0;
3001 }
3002
3003 static int
3004 jme_resume(struct pci_dev *pdev)
3005 {
3006         struct net_device *netdev = pci_get_drvdata(pdev);
3007         struct jme_adapter *jme = netdev_priv(netdev);
3008
3009         jme_clear_pm(jme);
3010         pci_restore_state(pdev);
3011
3012         if (test_bit(JME_FLAG_SSET, &jme->flags))
3013                 jme_set_settings(netdev, &jme->old_ecmd);
3014         else
3015                 jme_reset_phy_processor(jme);
3016
3017         jme_start_irq(jme);
3018         netif_device_attach(netdev);
3019
3020         atomic_inc(&jme->link_changing);
3021
3022         jme_reset_link(jme);
3023
3024         return 0;
3025 }
3026 #endif
3027
3028 static DEFINE_PCI_DEVICE_TABLE(jme_pci_tbl) = {
3029         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
3030         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
3031         { }
3032 };
3033
3034 static struct pci_driver jme_driver = {
3035         .name           = DRV_NAME,
3036         .id_table       = jme_pci_tbl,
3037         .probe          = jme_init_one,
3038         .remove         = __devexit_p(jme_remove_one),
3039 #ifdef CONFIG_PM
3040         .suspend        = jme_suspend,
3041         .resume         = jme_resume,
3042 #endif /* CONFIG_PM */
3043 };
3044
3045 static int __init
3046 jme_init_module(void)
3047 {
3048         printk(KERN_INFO PFX "JMicron JMC2XX ethernet "
3049                "driver version %s\n", DRV_VERSION);
3050         return pci_register_driver(&jme_driver);
3051 }
3052
3053 static void __exit
3054 jme_cleanup_module(void)
3055 {
3056         pci_unregister_driver(&jme_driver);
3057 }
3058
3059 module_init(jme_init_module);
3060 module_exit(jme_cleanup_module);
3061
3062 MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3063 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3064 MODULE_LICENSE("GPL");
3065 MODULE_VERSION(DRV_VERSION);
3066 MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3067