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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  25
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28 #include <linux/pci.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/mii.h>
  33 #include <linux/crc32.h>
  34 #include <linux/delay.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/in.h>
  37 #include <linux/ip.h>
  38 #include <linux/ipv6.h>
  39 #include <linux/tcp.h>
  40 #include <linux/udp.h>
  41 #include <linux/if_vlan.h>
  42 #include <linux/slab.h>
  43 #include <net/ip6_checksum.h>
  44 #include "jme.h"
  45
  46 static int force_pseudohp = -1;
  47 static int no_pseudohp = -1;
  48 static int no_extplug = -1;
  49 module_param(force_pseudohp, int, 0);
  50 MODULE_PARM_DESC(force_pseudohp,
  51         "Enable pseudo hot-plug feature manually by driver instead of BIOS.");
  52 module_param(no_pseudohp, int, 0);
  53 MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature.");
  54 module_param(no_extplug, int, 0);
  55 MODULE_PARM_DESC(no_extplug,
  56         "Do not use external plug signal for pseudo hot-plug.");
  57
  58 static int
  59 jme_mdio_read(struct net_device *netdev, int phy, int reg)
  60 {
  61         struct jme_adapter *jme = netdev_priv(netdev);
  62         int i, val, again = (reg == MII_BMSR) ? 1 : 0;
  63
  64 read_again:
  65         jwrite32(jme, JME_SMI, SMI_OP_REQ |
  66                                 smi_phy_addr(phy) |
  67                                 smi_reg_addr(reg));
  68
  69         wmb();
  70         for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
  71                 udelay(20);
  72                 val = jread32(jme, JME_SMI);
  73                 if ((val & SMI_OP_REQ) == 0)
  74                         break;
  75         }
  76
  77         if (i == 0) {
  78                 pr_err("phy(%d) read timeout : %d\n", phy, reg);
  79                 return 0;
  80         }
  81
  82         if (again--)
  83                 goto read_again;
  84
  85         return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT;
  86 }
  87
  88 static void
  89 jme_mdio_write(struct net_device *netdev,
  90                                 int phy, int reg, int val)
  91 {
  92         struct jme_adapter *jme = netdev_priv(netdev);
  93         int i;
  94
  95         jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
  96                 ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
  97                 smi_phy_addr(phy) | smi_reg_addr(reg));
  98
  99         wmb();
 100         for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
 101                 udelay(20);
 102                 if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0)
 103                         break;
 104         }
 105
 106         if (i == 0)
 107                 pr_err("phy(%d) write timeout : %d\n", phy, reg);
 108 }
 109
 110 static inline void
 111 jme_reset_phy_processor(struct jme_adapter *jme)
 112 {
 113         u32 val;
 114
 115         jme_mdio_write(jme->dev,
 116                         jme->mii_if.phy_id,
 117                         MII_ADVERTISE, ADVERTISE_ALL |
 118                         ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 119
 120         if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
 121                 jme_mdio_write(jme->dev,
 122                                 jme->mii_if.phy_id,
 123                                 MII_CTRL1000,
 124                                 ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 125
 126         val = jme_mdio_read(jme->dev,
 127                                 jme->mii_if.phy_id,
 128                                 MII_BMCR);
 129
 130         jme_mdio_write(jme->dev,
 131                         jme->mii_if.phy_id,
 132                         MII_BMCR, val | BMCR_RESET);
 133 }
 134
 135 static void
 136 jme_setup_wakeup_frame(struct jme_adapter *jme,
 137                 u32 *mask, u32 crc, int fnr)
 138 {
 139         int i;
 140
 141         /*
 142          * Setup CRC pattern
 143          */
 144         jwrite32(jme, JME_WFOI, WFOI_CRC_SEL | (fnr & WFOI_FRAME_SEL));
 145         wmb();
 146         jwrite32(jme, JME_WFODP, crc);
 147         wmb();
 148
 149         /*
 150          * Setup Mask
 151          */
 152         for (i = 0 ; i < WAKEUP_FRAME_MASK_DWNR ; ++i) {
 153                 jwrite32(jme, JME_WFOI,
 154                                 ((i << WFOI_MASK_SHIFT) & WFOI_MASK_SEL) |
 155                                 (fnr & WFOI_FRAME_SEL));
 156                 wmb();
 157                 jwrite32(jme, JME_WFODP, mask[i]);
 158                 wmb();
 159         }
 160 }
 161
 162 static inline void
 163 jme_reset_mac_processor(struct jme_adapter *jme)
 164 {
 165         u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0};
 166         u32 crc = 0xCDCDCDCD;
 167         u32 gpreg0;
 168         int i;
 169
 170         jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
 171         udelay(2);
 172         jwrite32(jme, JME_GHC, jme->reg_ghc);
 173
 174         jwrite32(jme, JME_RXDBA_LO, 0x00000000);
 175         jwrite32(jme, JME_RXDBA_HI, 0x00000000);
 176         jwrite32(jme, JME_RXQDC, 0x00000000);
 177         jwrite32(jme, JME_RXNDA, 0x00000000);
 178         jwrite32(jme, JME_TXDBA_LO, 0x00000000);
 179         jwrite32(jme, JME_TXDBA_HI, 0x00000000);
 180         jwrite32(jme, JME_TXQDC, 0x00000000);
 181         jwrite32(jme, JME_TXNDA, 0x00000000);
 182
 183         jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
 184         jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
 185         for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i)
 186                 jme_setup_wakeup_frame(jme, mask, crc, i);
 187         if (jme->fpgaver)
 188                 gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL;
 189         else
 190                 gpreg0 = GPREG0_DEFAULT;
 191         jwrite32(jme, JME_GPREG0, gpreg0);
 192         jwrite32(jme, JME_GPREG1, GPREG1_DEFAULT);
 193 }
 194
 195 static inline void
 196 jme_reset_ghc_speed(struct jme_adapter *jme)
 197 {
 198         jme->reg_ghc &= ~(GHC_SPEED_1000M | GHC_DPX);
 199         jwrite32(jme, JME_GHC, jme->reg_ghc);
 200 }
 201
 202 static inline void
 203 jme_clear_pm(struct jme_adapter *jme)
 204 {
 205         jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs);
 206         pci_set_power_state(jme->pdev, PCI_D0);
 207         pci_enable_wake(jme->pdev, PCI_D0, false);
 208 }
 209
 210 static int
 211 jme_reload_eeprom(struct jme_adapter *jme)
 212 {
 213         u32 val;
 214         int i;
 215
 216         val = jread32(jme, JME_SMBCSR);
 217
 218         if (val & SMBCSR_EEPROMD) {
 219                 val |= SMBCSR_CNACK;
 220                 jwrite32(jme, JME_SMBCSR, val);
 221                 val |= SMBCSR_RELOAD;
 222                 jwrite32(jme, JME_SMBCSR, val);
 223                 mdelay(12);
 224
 225                 for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
 226                         mdelay(1);
 227                         if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
 228                                 break;
 229                 }
 230
 231                 if (i == 0) {
 232                         pr_err("eeprom reload timeout\n");
 233                         return -EIO;
 234                 }
 235         }
 236
 237         return 0;
 238 }
 239
 240 static void
 241 jme_load_macaddr(struct net_device *netdev)
 242 {
 243         struct jme_adapter *jme = netdev_priv(netdev);
 244         unsigned char macaddr[6];
 245         u32 val;
 246
 247         spin_lock_bh(&jme->macaddr_lock);
 248         val = jread32(jme, JME_RXUMA_LO);
 249         macaddr[0] = (val >>  0) & 0xFF;
 250         macaddr[1] = (val >>  8) & 0xFF;
 251         macaddr[2] = (val >> 16) & 0xFF;
 252         macaddr[3] = (val >> 24) & 0xFF;
 253         val = jread32(jme, JME_RXUMA_HI);
 254         macaddr[4] = (val >>  0) & 0xFF;
 255         macaddr[5] = (val >>  8) & 0xFF;
 256         memcpy(netdev->dev_addr, macaddr, 6);
 257         spin_unlock_bh(&jme->macaddr_lock);
 258 }
 259
 260 static inline void
 261 jme_set_rx_pcc(struct jme_adapter *jme, int p)
 262 {
 263         switch (p) {
 264         case PCC_OFF:
 265                 jwrite32(jme, JME_PCCRX0,
 266                         ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 267                         ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 268                 break;
 269         case PCC_P1:
 270                 jwrite32(jme, JME_PCCRX0,
 271                         ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 272                         ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 273                 break;
 274         case PCC_P2:
 275                 jwrite32(jme, JME_PCCRX0,
 276                         ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 277                         ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 278                 break;
 279         case PCC_P3:
 280                 jwrite32(jme, JME_PCCRX0,
 281                         ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
 282                         ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
 283                 break;
 284         default:
 285                 break;
 286         }
 287         wmb();
 288
 289         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
 290                 netif_info(jme, rx_status, jme->dev, "Switched to PCC_P%d\n", p);
 291 }
 292
 293 static void
 294 jme_start_irq(struct jme_adapter *jme)
 295 {
 296         register struct dynpcc_info *dpi = &(jme->dpi);
 297
 298         jme_set_rx_pcc(jme, PCC_P1);
 299         dpi->cur                = PCC_P1;
 300         dpi->attempt            = PCC_P1;
 301         dpi->cnt                = 0;
 302
 303         jwrite32(jme, JME_PCCTX,
 304                         ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
 305                         ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
 306                         PCCTXQ0_EN
 307                 );
 308
 309         /*
 310          * Enable Interrupts
 311          */
 312         jwrite32(jme, JME_IENS, INTR_ENABLE);
 313 }
 314
 315 static inline void
 316 jme_stop_irq(struct jme_adapter *jme)
 317 {
 318         /*
 319          * Disable Interrupts
 320          */
 321         jwrite32f(jme, JME_IENC, INTR_ENABLE);
 322 }
 323
 324 static u32
 325 jme_linkstat_from_phy(struct jme_adapter *jme)
 326 {
 327         u32 phylink, bmsr;
 328
 329         phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
 330         bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
 331         if (bmsr & BMSR_ANCOMP)
 332                 phylink |= PHY_LINK_AUTONEG_COMPLETE;
 333
 334         return phylink;
 335 }
 336
 337 static inline void
 338 jme_set_phyfifoa(struct jme_adapter *jme)
 339 {
 340         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
 341 }
 342
 343 static inline void
 344 jme_set_phyfifob(struct jme_adapter *jme)
 345 {
 346         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
 347 }
 348
 349 static int
 350 jme_check_link(struct net_device *netdev, int testonly)
 351 {
 352         struct jme_adapter *jme = netdev_priv(netdev);
 353         u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1;
 354         char linkmsg[64];
 355         int rc = 0;
 356
 357         linkmsg[0] = '\0';
 358
 359         if (jme->fpgaver)
 360                 phylink = jme_linkstat_from_phy(jme);
 361         else
 362                 phylink = jread32(jme, JME_PHY_LINK);
 363
 364         if (phylink & PHY_LINK_UP) {
 365                 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
 366                         /*
 367                          * If we did not enable AN
 368                          * Speed/Duplex Info should be obtained from SMI
 369                          */
 370                         phylink = PHY_LINK_UP;
 371
 372                         bmcr = jme_mdio_read(jme->dev,
 373                                                 jme->mii_if.phy_id,
 374                                                 MII_BMCR);
 375
 376                         phylink |= ((bmcr & BMCR_SPEED1000) &&
 377                                         (bmcr & BMCR_SPEED100) == 0) ?
 378                                         PHY_LINK_SPEED_1000M :
 379                                         (bmcr & BMCR_SPEED100) ?
 380                                         PHY_LINK_SPEED_100M :
 381                                         PHY_LINK_SPEED_10M;
 382
 383                         phylink |= (bmcr & BMCR_FULLDPLX) ?
 384                                          PHY_LINK_DUPLEX : 0;
 385
 386                         strcat(linkmsg, "Forced: ");
 387                 } else {
 388                         /*
 389                          * Keep polling for speed/duplex resolve complete
 390                          */
 391                         while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
 392                                 --cnt) {
 393
 394                                 udelay(1);
 395
 396                                 if (jme->fpgaver)
 397                                         phylink = jme_linkstat_from_phy(jme);
 398                                 else
 399                                         phylink = jread32(jme, JME_PHY_LINK);
 400                         }
 401                         if (!cnt)
 402                                 pr_err("Waiting speed resolve timeout\n");
 403
 404                         strcat(linkmsg, "ANed: ");
 405                 }
 406
 407                 if (jme->phylink == phylink) {
 408                         rc = 1;
 409                         goto out;
 410                 }
 411                 if (testonly)
 412                         goto out;
 413
 414                 jme->phylink = phylink;
 415
 416                 ghc = jme->reg_ghc & ~(GHC_SPEED | GHC_DPX |
 417                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE |
 418                                 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY);
 419                 switch (phylink & PHY_LINK_SPEED_MASK) {
 420                 case PHY_LINK_SPEED_10M:
 421                         ghc |= GHC_SPEED_10M |
 422                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
 423                         strcat(linkmsg, "10 Mbps, ");
 424                         break;
 425                 case PHY_LINK_SPEED_100M:
 426                         ghc |= GHC_SPEED_100M |
 427                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
 428                         strcat(linkmsg, "100 Mbps, ");
 429                         break;
 430                 case PHY_LINK_SPEED_1000M:
 431                         ghc |= GHC_SPEED_1000M |
 432                                 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
 433                         strcat(linkmsg, "1000 Mbps, ");
 434                         break;
 435                 default:
 436                         break;
 437                 }
 438
 439                 if (phylink & PHY_LINK_DUPLEX) {
 440                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
 441                         ghc |= GHC_DPX;
 442                 } else {
 443                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
 444                                                 TXMCS_BACKOFF |
 445                                                 TXMCS_CARRIERSENSE |
 446                                                 TXMCS_COLLISION);
 447                         jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN |
 448                                 ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) |
 449                                 TXTRHD_TXREN |
 450                                 ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL));
 451                 }
 452
 453                 gpreg1 = GPREG1_DEFAULT;
 454                 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
 455                         if (!(phylink & PHY_LINK_DUPLEX))
 456                                 gpreg1 |= GPREG1_HALFMODEPATCH;
 457                         switch (phylink & PHY_LINK_SPEED_MASK) {
 458                         case PHY_LINK_SPEED_10M:
 459                                 jme_set_phyfifoa(jme);
 460                                 gpreg1 |= GPREG1_RSSPATCH;
 461                                 break;
 462                         case PHY_LINK_SPEED_100M:
 463                                 jme_set_phyfifob(jme);
 464                                 gpreg1 |= GPREG1_RSSPATCH;
 465                                 break;
 466                         case PHY_LINK_SPEED_1000M:
 467                                 jme_set_phyfifoa(jme);
 468                                 break;
 469                         default:
 470                                 break;
 471                         }
 472                 }
 473
 474                 jwrite32(jme, JME_GPREG1, gpreg1);
 475                 jwrite32(jme, JME_GHC, ghc);
 476                 jme->reg_ghc = ghc;
 477
 478                 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
 479                                         "Full-Duplex, " :
 480                                         "Half-Duplex, ");
 481                 strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
 482                                         "MDI-X" :
 483                                         "MDI");
 484                 netif_info(jme, link, jme->dev, "Link is up at %s\n", linkmsg);
 485                 netif_carrier_on(netdev);
 486         } else {
 487                 if (testonly)
 488                         goto out;
 489
 490                 netif_info(jme, link, jme->dev, "Link is down\n");
 491                 jme->phylink = 0;
 492                 netif_carrier_off(netdev);
 493         }
 494
 495 out:
 496         return rc;
 497 }
 498
 499 static int
 500 jme_setup_tx_resources(struct jme_adapter *jme)
 501 {
 502         struct jme_ring *txring = &(jme->txring[0]);
 503
 504         txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
 505                                    TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 506                                    &(txring->dmaalloc),
 507                                    GFP_ATOMIC);
 508
 509         if (!txring->alloc)
 510                 goto err_set_null;
 511
 512         /*
 513          * 16 Bytes align
 514          */
 515         txring->desc            = (void *)ALIGN((unsigned long)(txring->alloc),
 516                                                 RING_DESC_ALIGN);
 517         txring->dma             = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
 518         txring->next_to_use     = 0;
 519         atomic_set(&txring->next_to_clean, 0);
 520         atomic_set(&txring->nr_free, jme->tx_ring_size);
 521
 522         txring->bufinf          = kmalloc(sizeof(struct jme_buffer_info) *
 523                                         jme->tx_ring_size, GFP_ATOMIC);
 524         if (unlikely(!(txring->bufinf)))
 525                 goto err_free_txring;
 526
 527         /*
 528          * Initialize Transmit Descriptors
 529          */
 530         memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
 531         memset(txring->bufinf, 0,
 532                 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
 533
 534         return 0;
 535
 536 err_free_txring:
 537         dma_free_coherent(&(jme->pdev->dev),
 538                           TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 539                           txring->alloc,
 540                           txring->dmaalloc);
 541
 542 err_set_null:
 543         txring->desc = NULL;
 544         txring->dmaalloc = 0;
 545         txring->dma = 0;
 546         txring->bufinf = NULL;
 547
 548         return -ENOMEM;
 549 }
 550
 551 static void
 552 jme_free_tx_resources(struct jme_adapter *jme)
 553 {
 554         int i;
 555         struct jme_ring *txring = &(jme->txring[0]);
 556         struct jme_buffer_info *txbi;
 557
 558         if (txring->alloc) {
 559                 if (txring->bufinf) {
 560                         for (i = 0 ; i < jme->tx_ring_size ; ++i) {
 561                                 txbi = txring->bufinf + i;
 562                                 if (txbi->skb) {
 563                                         dev_kfree_skb(txbi->skb);
 564                                         txbi->skb = NULL;
 565                                 }
 566                                 txbi->mapping           = 0;
 567                                 txbi->len               = 0;
 568                                 txbi->nr_desc           = 0;
 569                                 txbi->start_xmit        = 0;
 570                         }
 571                         kfree(txring->bufinf);
 572                 }
 573
 574                 dma_free_coherent(&(jme->pdev->dev),
 575                                   TX_RING_ALLOC_SIZE(jme->tx_ring_size),
 576                                   txring->alloc,
 577                                   txring->dmaalloc);
 578
 579                 txring->alloc           = NULL;
 580                 txring->desc            = NULL;
 581                 txring->dmaalloc        = 0;
 582                 txring->dma             = 0;
 583                 txring->bufinf          = NULL;
 584         }
 585         txring->next_to_use     = 0;
 586         atomic_set(&txring->next_to_clean, 0);
 587         atomic_set(&txring->nr_free, 0);
 588 }
 589
 590 static inline void
 591 jme_enable_tx_engine(struct jme_adapter *jme)
 592 {
 593         /*
 594          * Select Queue 0
 595          */
 596         jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
 597         wmb();
 598
 599         /*
 600          * Setup TX Queue 0 DMA Bass Address
 601          */
 602         jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
 603         jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
 604         jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
 605
 606         /*
 607          * Setup TX Descptor Count
 608          */
 609         jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
 610
 611         /*
 612          * Enable TX Engine
 613          */
 614         wmb();
 615         jwrite32(jme, JME_TXCS, jme->reg_txcs |
 616                                 TXCS_SELECT_QUEUE0 |
 617                                 TXCS_ENABLE);
 618
 619 }
 620
 621 static inline void
 622 jme_restart_tx_engine(struct jme_adapter *jme)
 623 {
 624         /*
 625          * Restart TX Engine
 626          */
 627         jwrite32(jme, JME_TXCS, jme->reg_txcs |
 628                                 TXCS_SELECT_QUEUE0 |
 629                                 TXCS_ENABLE);
 630 }
 631
 632 static inline void
 633 jme_disable_tx_engine(struct jme_adapter *jme)
 634 {
 635         int i;
 636         u32 val;
 637
 638         /*
 639          * Disable TX Engine
 640          */
 641         jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
 642         wmb();
 643
 644         val = jread32(jme, JME_TXCS);
 645         for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
 646                 mdelay(1);
 647                 val = jread32(jme, JME_TXCS);
 648                 rmb();
 649         }
 650
 651         if (!i)
 652                 pr_err("Disable TX engine timeout\n");
 653 }
 654
 655 static void
 656 jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
 657 {
 658         struct jme_ring *rxring = &(jme->rxring[0]);
 659         register struct rxdesc *rxdesc = rxring->desc;
 660         struct jme_buffer_info *rxbi = rxring->bufinf;
 661         rxdesc += i;
 662         rxbi += i;
 663
 664         rxdesc->dw[0] = 0;
 665         rxdesc->dw[1] = 0;
 666         rxdesc->desc1.bufaddrh  = cpu_to_le32((__u64)rxbi->mapping >> 32);
 667         rxdesc->desc1.bufaddrl  = cpu_to_le32(
 668                                         (__u64)rxbi->mapping & 0xFFFFFFFFUL);
 669         rxdesc->desc1.datalen   = cpu_to_le16(rxbi->len);
 670         if (jme->dev->features & NETIF_F_HIGHDMA)
 671                 rxdesc->desc1.flags = RXFLAG_64BIT;
 672         wmb();
 673         rxdesc->desc1.flags     |= RXFLAG_OWN | RXFLAG_INT;
 674 }
 675
 676 static int
 677 jme_make_new_rx_buf(struct jme_adapter *jme, int i)
 678 {
 679         struct jme_ring *rxring = &(jme->rxring[0]);
 680         struct jme_buffer_info *rxbi = rxring->bufinf + i;
 681         struct sk_buff *skb;
 682
 683         skb = netdev_alloc_skb(jme->dev,
 684                 jme->dev->mtu + RX_EXTRA_LEN);
 685         if (unlikely(!skb))
 686                 return -ENOMEM;
 687
 688         rxbi->skb = skb;
 689         rxbi->len = skb_tailroom(skb);
 690         rxbi->mapping = pci_map_page(jme->pdev,
 691                                         virt_to_page(skb->data),
 692                                         offset_in_page(skb->data),
 693                                         rxbi->len,
 694                                         PCI_DMA_FROMDEVICE);
 695
 696         return 0;
 697 }
 698
 699 static void
 700 jme_free_rx_buf(struct jme_adapter *jme, int i)
 701 {
 702         struct jme_ring *rxring = &(jme->rxring[0]);
 703         struct jme_buffer_info *rxbi = rxring->bufinf;
 704         rxbi += i;
 705
 706         if (rxbi->skb) {
 707                 pci_unmap_page(jme->pdev,
 708                                  rxbi->mapping,
 709                                  rxbi->len,
 710                                  PCI_DMA_FROMDEVICE);
 711                 dev_kfree_skb(rxbi->skb);
 712                 rxbi->skb = NULL;
 713                 rxbi->mapping = 0;
 714                 rxbi->len = 0;
 715         }
 716 }
 717
 718 static void
 719 jme_free_rx_resources(struct jme_adapter *jme)
 720 {
 721         int i;
 722         struct jme_ring *rxring = &(jme->rxring[0]);
 723
 724         if (rxring->alloc) {
 725                 if (rxring->bufinf) {
 726                         for (i = 0 ; i < jme->rx_ring_size ; ++i)
 727                                 jme_free_rx_buf(jme, i);
 728                         kfree(rxring->bufinf);
 729                 }
 730
 731                 dma_free_coherent(&(jme->pdev->dev),
 732                                   RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 733                                   rxring->alloc,
 734                                   rxring->dmaalloc);
 735                 rxring->alloc    = NULL;
 736                 rxring->desc     = NULL;
 737                 rxring->dmaalloc = 0;
 738                 rxring->dma      = 0;
 739                 rxring->bufinf   = NULL;
 740         }
 741         rxring->next_to_use   = 0;
 742         atomic_set(&rxring->next_to_clean, 0);
 743 }
 744
 745 static int
 746 jme_setup_rx_resources(struct jme_adapter *jme)
 747 {
 748         int i;
 749         struct jme_ring *rxring = &(jme->rxring[0]);
 750
 751         rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
 752                                    RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 753                                    &(rxring->dmaalloc),
 754                                    GFP_ATOMIC);
 755         if (!rxring->alloc)
 756                 goto err_set_null;
 757
 758         /*
 759          * 16 Bytes align
 760          */
 761         rxring->desc            = (void *)ALIGN((unsigned long)(rxring->alloc),
 762                                                 RING_DESC_ALIGN);
 763         rxring->dma             = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
 764         rxring->next_to_use     = 0;
 765         atomic_set(&rxring->next_to_clean, 0);
 766
 767         rxring->bufinf          = kmalloc(sizeof(struct jme_buffer_info) *
 768                                         jme->rx_ring_size, GFP_ATOMIC);
 769         if (unlikely(!(rxring->bufinf)))
 770                 goto err_free_rxring;
 771
 772         /*
 773          * Initiallize Receive Descriptors
 774          */
 775         memset(rxring->bufinf, 0,
 776                 sizeof(struct jme_buffer_info) * jme->rx_ring_size);
 777         for (i = 0 ; i < jme->rx_ring_size ; ++i) {
 778                 if (unlikely(jme_make_new_rx_buf(jme, i))) {
 779                         jme_free_rx_resources(jme);
 780                         return -ENOMEM;
 781                 }
 782
 783                 jme_set_clean_rxdesc(jme, i);
 784         }
 785
 786         return 0;
 787
 788 err_free_rxring:
 789         dma_free_coherent(&(jme->pdev->dev),
 790                           RX_RING_ALLOC_SIZE(jme->rx_ring_size),
 791                           rxring->alloc,
 792                           rxring->dmaalloc);
 793 err_set_null:
 794         rxring->desc = NULL;
 795         rxring->dmaalloc = 0;
 796         rxring->dma = 0;
 797         rxring->bufinf = NULL;
 798
 799         return -ENOMEM;
 800 }
 801
 802 static inline void
 803 jme_enable_rx_engine(struct jme_adapter *jme)
 804 {
 805         /*
 806          * Select Queue 0
 807          */
 808         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 809                                 RXCS_QUEUESEL_Q0);
 810         wmb();
 811
 812         /*
 813          * Setup RX DMA Bass Address
 814          */
 815         jwrite32(jme, JME_RXDBA_LO, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
 816         jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
 817         jwrite32(jme, JME_RXNDA, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
 818
 819         /*
 820          * Setup RX Descriptor Count
 821          */
 822         jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
 823
 824         /*
 825          * Setup Unicast Filter
 826          */
 827         jme_set_multi(jme->dev);
 828
 829         /*
 830          * Enable RX Engine
 831          */
 832         wmb();
 833         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 834                                 RXCS_QUEUESEL_Q0 |
 835                                 RXCS_ENABLE |
 836                                 RXCS_QST);
 837 }
 838
 839 static inline void
 840 jme_restart_rx_engine(struct jme_adapter *jme)
 841 {
 842         /*
 843          * Start RX Engine
 844          */
 845         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
 846                                 RXCS_QUEUESEL_Q0 |
 847                                 RXCS_ENABLE |
 848                                 RXCS_QST);
 849 }
 850
 851 static inline void
 852 jme_disable_rx_engine(struct jme_adapter *jme)
 853 {
 854         int i;
 855         u32 val;
 856
 857         /*
 858          * Disable RX Engine
 859          */
 860         jwrite32(jme, JME_RXCS, jme->reg_rxcs);
 861         wmb();
 862
 863         val = jread32(jme, JME_RXCS);
 864         for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
 865                 mdelay(1);
 866                 val = jread32(jme, JME_RXCS);
 867                 rmb();
 868         }
 869
 870         if (!i)
 871                 pr_err("Disable RX engine timeout\n");
 872
 873 }
 874
 875 static int
 876 jme_rxsum_ok(struct jme_adapter *jme, u16 flags)
 877 {
 878         if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
 879                 return false;
 880
 881         if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_TCPON | RXWBFLAG_TCPCS))
 882                         == RXWBFLAG_TCPON)) {
 883                 if (flags & RXWBFLAG_IPV4)
 884                         netif_err(jme, rx_err, jme->dev, "TCP Checksum error\n");
 885                 return false;
 886         }
 887
 888         if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_UDPON | RXWBFLAG_UDPCS))
 889                         == RXWBFLAG_UDPON)) {
 890                 if (flags & RXWBFLAG_IPV4)
 891                         netif_err(jme, rx_err, jme->dev, "UDP Checksum error\n");
 892                 return false;
 893         }
 894
 895         if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
 896                         == RXWBFLAG_IPV4)) {
 897                 netif_err(jme, rx_err, jme->dev, "IPv4 Checksum error\n");
 898                 return false;
 899         }
 900
 901         return true;
 902 }
 903
 904 static void
 905 jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
 906 {
 907         struct jme_ring *rxring = &(jme->rxring[0]);
 908         struct rxdesc *rxdesc = rxring->desc;
 909         struct jme_buffer_info *rxbi = rxring->bufinf;
 910         struct sk_buff *skb;
 911         int framesize;
 912
 913         rxdesc += idx;
 914         rxbi += idx;
 915
 916         skb = rxbi->skb;
 917         pci_dma_sync_single_for_cpu(jme->pdev,
 918                                         rxbi->mapping,
 919                                         rxbi->len,
 920                                         PCI_DMA_FROMDEVICE);
 921
 922         if (unlikely(jme_make_new_rx_buf(jme, idx))) {
 923                 pci_dma_sync_single_for_device(jme->pdev,
 924                                                 rxbi->mapping,
 925                                                 rxbi->len,
 926                                                 PCI_DMA_FROMDEVICE);
 927
 928                 ++(NET_STAT(jme).rx_dropped);
 929         } else {
 930                 framesize = le16_to_cpu(rxdesc->descwb.framesize)
 931                                 - RX_PREPAD_SIZE;
 932
 933                 skb_reserve(skb, RX_PREPAD_SIZE);
 934                 skb_put(skb, framesize);
 935                 skb->protocol = eth_type_trans(skb, jme->dev);
 936
 937                 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags)))
 938                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 939                 else
 940                         skb_checksum_none_assert(skb);
 941
 942                 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
 943                         if (jme->vlgrp) {
 944                                 jme->jme_vlan_rx(skb, jme->vlgrp,
 945                                         le16_to_cpu(rxdesc->descwb.vlan));
 946                                 NET_STAT(jme).rx_bytes += 4;
 947                         } else {
 948                                 dev_kfree_skb(skb);
 949                         }
 950                 } else {
 951                         jme->jme_rx(skb);
 952                 }
 953
 954                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
 955                     cpu_to_le16(RXWBFLAG_DEST_MUL))
 956                         ++(NET_STAT(jme).multicast);
 957
 958                 NET_STAT(jme).rx_bytes += framesize;
 959                 ++(NET_STAT(jme).rx_packets);
 960         }
 961
 962         jme_set_clean_rxdesc(jme, idx);
 963
 964 }
 965
 966 static int
 967 jme_process_receive(struct jme_adapter *jme, int limit)
 968 {
 969         struct jme_ring *rxring = &(jme->rxring[0]);
 970         struct rxdesc *rxdesc = rxring->desc;
 971         int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
 972
 973         if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
 974                 goto out_inc;
 975
 976         if (unlikely(atomic_read(&jme->link_changing) != 1))
 977                 goto out_inc;
 978
 979         if (unlikely(!netif_carrier_ok(jme->dev)))
 980                 goto out_inc;
 981
 982         i = atomic_read(&rxring->next_to_clean);
 983         while (limit > 0) {
 984                 rxdesc = rxring->desc;
 985                 rxdesc += i;
 986
 987                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
 988                 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
 989                         goto out;
 990                 --limit;
 991
 992                 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
 993
 994                 if (unlikely(desccnt > 1 ||
 995                 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
 996
 997                         if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
 998                                 ++(NET_STAT(jme).rx_crc_errors);
 999                         else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
1000                                 ++(NET_STAT(jme).rx_fifo_errors);
1001                         else
1002                                 ++(NET_STAT(jme).rx_errors);
1003
1004                         if (desccnt > 1)
1005                                 limit -= desccnt - 1;
1006
1007                         for (j = i, ccnt = desccnt ; ccnt-- ; ) {
1008                                 jme_set_clean_rxdesc(jme, j);
1009                                 j = (j + 1) & (mask);
1010                         }
1011
1012                 } else {
1013                         jme_alloc_and_feed_skb(jme, i);
1014                 }
1015
1016                 i = (i + desccnt) & (mask);
1017         }
1018
1019 out:
1020         atomic_set(&rxring->next_to_clean, i);
1021
1022 out_inc:
1023         atomic_inc(&jme->rx_cleaning);
1024
1025         return limit > 0 ? limit : 0;
1026
1027 }
1028
1029 static void
1030 jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1031 {
1032         if (likely(atmp == dpi->cur)) {
1033                 dpi->cnt = 0;
1034                 return;
1035         }
1036
1037         if (dpi->attempt == atmp) {
1038                 ++(dpi->cnt);
1039         } else {
1040                 dpi->attempt = atmp;
1041                 dpi->cnt = 0;
1042         }
1043
1044 }
1045
1046 static void
1047 jme_dynamic_pcc(struct jme_adapter *jme)
1048 {
1049         register struct dynpcc_info *dpi = &(jme->dpi);
1050
1051         if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1052                 jme_attempt_pcc(dpi, PCC_P3);
1053         else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD ||
1054                  dpi->intr_cnt > PCC_INTR_THRESHOLD)
1055                 jme_attempt_pcc(dpi, PCC_P2);
1056         else
1057                 jme_attempt_pcc(dpi, PCC_P1);
1058
1059         if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1060                 if (dpi->attempt < dpi->cur)
1061                         tasklet_schedule(&jme->rxclean_task);
1062                 jme_set_rx_pcc(jme, dpi->attempt);
1063                 dpi->cur = dpi->attempt;
1064                 dpi->cnt = 0;
1065         }
1066 }
1067
1068 static void
1069 jme_start_pcc_timer(struct jme_adapter *jme)
1070 {
1071         struct dynpcc_info *dpi = &(jme->dpi);
1072         dpi->last_bytes         = NET_STAT(jme).rx_bytes;
1073         dpi->last_pkts          = NET_STAT(jme).rx_packets;
1074         dpi->intr_cnt           = 0;
1075         jwrite32(jme, JME_TMCSR,
1076                 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1077 }
1078
1079 static inline void
1080 jme_stop_pcc_timer(struct jme_adapter *jme)
1081 {
1082         jwrite32(jme, JME_TMCSR, 0);
1083 }
1084
1085 static void
1086 jme_shutdown_nic(struct jme_adapter *jme)
1087 {
1088         u32 phylink;
1089
1090         phylink = jme_linkstat_from_phy(jme);
1091
1092         if (!(phylink & PHY_LINK_UP)) {
1093                 /*
1094                  * Disable all interrupt before issue timer
1095                  */
1096                 jme_stop_irq(jme);
1097                 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1098         }
1099 }
1100
1101 static void
1102 jme_pcc_tasklet(unsigned long arg)
1103 {
1104         struct jme_adapter *jme = (struct jme_adapter *)arg;
1105         struct net_device *netdev = jme->dev;
1106
1107         if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1108                 jme_shutdown_nic(jme);
1109                 return;
1110         }
1111
1112         if (unlikely(!netif_carrier_ok(netdev) ||
1113                 (atomic_read(&jme->link_changing) != 1)
1114         )) {
1115                 jme_stop_pcc_timer(jme);
1116                 return;
1117         }
1118
1119         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1120                 jme_dynamic_pcc(jme);
1121
1122         jme_start_pcc_timer(jme);
1123 }
1124
1125 static inline void
1126 jme_polling_mode(struct jme_adapter *jme)
1127 {
1128         jme_set_rx_pcc(jme, PCC_OFF);
1129 }
1130
1131 static inline void
1132 jme_interrupt_mode(struct jme_adapter *jme)
1133 {
1134         jme_set_rx_pcc(jme, PCC_P1);
1135 }
1136
1137 static inline int
1138 jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1139 {
1140         u32 apmc;
1141         apmc = jread32(jme, JME_APMC);
1142         return apmc & JME_APMC_PSEUDO_HP_EN;
1143 }
1144
1145 static void
1146 jme_start_shutdown_timer(struct jme_adapter *jme)
1147 {
1148         u32 apmc;
1149
1150         apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1151         apmc &= ~JME_APMC_EPIEN_CTRL;
1152         if (!no_extplug) {
1153                 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1154                 wmb();
1155         }
1156         jwrite32f(jme, JME_APMC, apmc);
1157
1158         jwrite32f(jme, JME_TIMER2, 0);
1159         set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1160         jwrite32(jme, JME_TMCSR,
1161                 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1162 }
1163
1164 static void
1165 jme_stop_shutdown_timer(struct jme_adapter *jme)
1166 {
1167         u32 apmc;
1168
1169         jwrite32f(jme, JME_TMCSR, 0);
1170         jwrite32f(jme, JME_TIMER2, 0);
1171         clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1172
1173         apmc = jread32(jme, JME_APMC);
1174         apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1175         jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1176         wmb();
1177         jwrite32f(jme, JME_APMC, apmc);
1178 }
1179
1180 static void
1181 jme_link_change_tasklet(unsigned long arg)
1182 {
1183         struct jme_adapter *jme = (struct jme_adapter *)arg;
1184         struct net_device *netdev = jme->dev;
1185         int rc;
1186
1187         while (!atomic_dec_and_test(&jme->link_changing)) {
1188                 atomic_inc(&jme->link_changing);
1189                 netif_info(jme, intr, jme->dev, "Get link change lock failed\n");
1190                 while (atomic_read(&jme->link_changing) != 1)
1191                         netif_info(jme, intr, jme->dev, "Waiting link change lock\n");
1192         }
1193
1194         if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1195                 goto out;
1196
1197         jme->old_mtu = netdev->mtu;
1198         netif_stop_queue(netdev);
1199         if (jme_pseudo_hotplug_enabled(jme))
1200                 jme_stop_shutdown_timer(jme);
1201
1202         jme_stop_pcc_timer(jme);
1203         tasklet_disable(&jme->txclean_task);
1204         tasklet_disable(&jme->rxclean_task);
1205         tasklet_disable(&jme->rxempty_task);
1206
1207         if (netif_carrier_ok(netdev)) {
1208                 jme_reset_ghc_speed(jme);
1209                 jme_disable_rx_engine(jme);
1210                 jme_disable_tx_engine(jme);
1211                 jme_reset_mac_processor(jme);
1212                 jme_free_rx_resources(jme);
1213                 jme_free_tx_resources(jme);
1214
1215                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1216                         jme_polling_mode(jme);
1217
1218                 netif_carrier_off(netdev);
1219         }
1220
1221         jme_check_link(netdev, 0);
1222         if (netif_carrier_ok(netdev)) {
1223                 rc = jme_setup_rx_resources(jme);
1224                 if (rc) {
1225                         pr_err("Allocating resources for RX error, Device STOPPED!\n");
1226                         goto out_enable_tasklet;
1227                 }
1228
1229                 rc = jme_setup_tx_resources(jme);
1230                 if (rc) {
1231                         pr_err("Allocating resources for TX error, Device STOPPED!\n");
1232                         goto err_out_free_rx_resources;
1233                 }
1234
1235                 jme_enable_rx_engine(jme);
1236                 jme_enable_tx_engine(jme);
1237
1238                 netif_start_queue(netdev);
1239
1240                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1241                         jme_interrupt_mode(jme);
1242
1243                 jme_start_pcc_timer(jme);
1244         } else if (jme_pseudo_hotplug_enabled(jme)) {
1245                 jme_start_shutdown_timer(jme);
1246         }
1247
1248         goto out_enable_tasklet;
1249
1250 err_out_free_rx_resources:
1251         jme_free_rx_resources(jme);
1252 out_enable_tasklet:
1253         tasklet_enable(&jme->txclean_task);
1254         tasklet_hi_enable(&jme->rxclean_task);
1255         tasklet_hi_enable(&jme->rxempty_task);
1256 out:
1257         atomic_inc(&jme->link_changing);
1258 }
1259
1260 static void
1261 jme_rx_clean_tasklet(unsigned long arg)
1262 {
1263         struct jme_adapter *jme = (struct jme_adapter *)arg;
1264         struct dynpcc_info *dpi = &(jme->dpi);
1265
1266         jme_process_receive(jme, jme->rx_ring_size);
1267         ++(dpi->intr_cnt);
1268
1269 }
1270
1271 static int
1272 jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1273 {
1274         struct jme_adapter *jme = jme_napi_priv(holder);
1275         int rest;
1276
1277         rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1278
1279         while (atomic_read(&jme->rx_empty) > 0) {
1280                 atomic_dec(&jme->rx_empty);
1281                 ++(NET_STAT(jme).rx_dropped);
1282                 jme_restart_rx_engine(jme);
1283         }
1284         atomic_inc(&jme->rx_empty);
1285
1286         if (rest) {
1287                 JME_RX_COMPLETE(netdev, holder);
1288                 jme_interrupt_mode(jme);
1289         }
1290
1291         JME_NAPI_WEIGHT_SET(budget, rest);
1292         return JME_NAPI_WEIGHT_VAL(budget) - rest;
1293 }
1294
1295 static void
1296 jme_rx_empty_tasklet(unsigned long arg)
1297 {
1298         struct jme_adapter *jme = (struct jme_adapter *)arg;
1299
1300         if (unlikely(atomic_read(&jme->link_changing) != 1))
1301                 return;
1302
1303         if (unlikely(!netif_carrier_ok(jme->dev)))
1304                 return;
1305
1306         netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
1307
1308         jme_rx_clean_tasklet(arg);
1309
1310         while (atomic_read(&jme->rx_empty) > 0) {
1311                 atomic_dec(&jme->rx_empty);
1312                 ++(NET_STAT(jme).rx_dropped);
1313                 jme_restart_rx_engine(jme);
1314         }
1315         atomic_inc(&jme->rx_empty);
1316 }
1317
1318 static void
1319 jme_wake_queue_if_stopped(struct jme_adapter *jme)
1320 {
1321         struct jme_ring *txring = &(jme->txring[0]);
1322
1323         smp_wmb();
1324         if (unlikely(netif_queue_stopped(jme->dev) &&
1325         atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1326                 netif_info(jme, tx_done, jme->dev, "TX Queue Waked\n");
1327                 netif_wake_queue(jme->dev);
1328         }
1329
1330 }
1331
1332 static void
1333 jme_tx_clean_tasklet(unsigned long arg)
1334 {
1335         struct jme_adapter *jme = (struct jme_adapter *)arg;
1336         struct jme_ring *txring = &(jme->txring[0]);
1337         struct txdesc *txdesc = txring->desc;
1338         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1339         int i, j, cnt = 0, max, err, mask;
1340
1341         tx_dbg(jme, "Into txclean\n");
1342
1343         if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1344                 goto out;
1345
1346         if (unlikely(atomic_read(&jme->link_changing) != 1))
1347                 goto out;
1348
1349         if (unlikely(!netif_carrier_ok(jme->dev)))
1350                 goto out;
1351
1352         max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1353         mask = jme->tx_ring_mask;
1354
1355         for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1356
1357                 ctxbi = txbi + i;
1358
1359                 if (likely(ctxbi->skb &&
1360                 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1361
1362                         tx_dbg(jme, "txclean: %d+%d@%lu\n",
1363                                i, ctxbi->nr_desc, jiffies);
1364
1365                         err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1366
1367                         for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1368                                 ttxbi = txbi + ((i + j) & (mask));
1369                                 txdesc[(i + j) & (mask)].dw[0] = 0;
1370
1371                                 pci_unmap_page(jme->pdev,
1372                                                  ttxbi->mapping,
1373                                                  ttxbi->len,
1374                                                  PCI_DMA_TODEVICE);
1375
1376                                 ttxbi->mapping = 0;
1377                                 ttxbi->len = 0;
1378                         }
1379
1380                         dev_kfree_skb(ctxbi->skb);
1381
1382                         cnt += ctxbi->nr_desc;
1383
1384                         if (unlikely(err)) {
1385                                 ++(NET_STAT(jme).tx_carrier_errors);
1386                         } else {
1387                                 ++(NET_STAT(jme).tx_packets);
1388                                 NET_STAT(jme).tx_bytes += ctxbi->len;
1389                         }
1390
1391                         ctxbi->skb = NULL;
1392                         ctxbi->len = 0;
1393                         ctxbi->start_xmit = 0;
1394
1395                 } else {
1396                         break;
1397                 }
1398
1399                 i = (i + ctxbi->nr_desc) & mask;
1400
1401                 ctxbi->nr_desc = 0;
1402         }
1403
1404         tx_dbg(jme, "txclean: done %d@%lu\n", i, jiffies);
1405         atomic_set(&txring->next_to_clean, i);
1406         atomic_add(cnt, &txring->nr_free);
1407
1408         jme_wake_queue_if_stopped(jme);
1409
1410 out:
1411         atomic_inc(&jme->tx_cleaning);
1412 }
1413
1414 static void
1415 jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1416 {
1417         /*
1418          * Disable interrupt
1419          */
1420         jwrite32f(jme, JME_IENC, INTR_ENABLE);
1421
1422         if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1423                 /*
1424                  * Link change event is critical
1425                  * all other events are ignored
1426                  */
1427                 jwrite32(jme, JME_IEVE, intrstat);
1428                 tasklet_schedule(&jme->linkch_task);
1429                 goto out_reenable;
1430         }
1431
1432         if (intrstat & INTR_TMINTR) {
1433                 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1434                 tasklet_schedule(&jme->pcc_task);
1435         }
1436
1437         if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1438                 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1439                 tasklet_schedule(&jme->txclean_task);
1440         }
1441
1442         if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1443                 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1444                                                      INTR_PCCRX0 |
1445                                                      INTR_RX0EMP)) |
1446                                         INTR_RX0);
1447         }
1448
1449         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1450                 if (intrstat & INTR_RX0EMP)
1451                         atomic_inc(&jme->rx_empty);
1452
1453                 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1454                         if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1455                                 jme_polling_mode(jme);
1456                                 JME_RX_SCHEDULE(jme);
1457                         }
1458                 }
1459         } else {
1460                 if (intrstat & INTR_RX0EMP) {
1461                         atomic_inc(&jme->rx_empty);
1462                         tasklet_hi_schedule(&jme->rxempty_task);
1463                 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1464                         tasklet_hi_schedule(&jme->rxclean_task);
1465                 }
1466         }
1467
1468 out_reenable:
1469         /*
1470          * Re-enable interrupt
1471          */
1472         jwrite32f(jme, JME_IENS, INTR_ENABLE);
1473 }
1474
1475 static irqreturn_t
1476 jme_intr(int irq, void *dev_id)
1477 {
1478         struct net_device *netdev = dev_id;
1479         struct jme_adapter *jme = netdev_priv(netdev);
1480         u32 intrstat;
1481
1482         intrstat = jread32(jme, JME_IEVE);
1483
1484         /*
1485          * Check if it's really an interrupt for us
1486          */
1487         if (unlikely((intrstat & INTR_ENABLE) == 0))
1488                 return IRQ_NONE;
1489
1490         /*
1491          * Check if the device still exist
1492          */
1493         if (unlikely(intrstat == ~((typeof(intrstat))0)))
1494                 return IRQ_NONE;
1495
1496         jme_intr_msi(jme, intrstat);
1497
1498         return IRQ_HANDLED;
1499 }
1500
1501 static irqreturn_t
1502 jme_msi(int irq, void *dev_id)
1503 {
1504         struct net_device *netdev = dev_id;
1505         struct jme_adapter *jme = netdev_priv(netdev);
1506         u32 intrstat;
1507
1508         intrstat = jread32(jme, JME_IEVE);
1509
1510         jme_intr_msi(jme, intrstat);
1511
1512         return IRQ_HANDLED;
1513 }
1514
1515 static void
1516 jme_reset_link(struct jme_adapter *jme)
1517 {
1518         jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1519 }
1520
1521 static void
1522 jme_restart_an(struct jme_adapter *jme)
1523 {
1524         u32 bmcr;
1525
1526         spin_lock_bh(&jme->phy_lock);
1527         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1528         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1529         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1530         spin_unlock_bh(&jme->phy_lock);
1531 }
1532
1533 static int
1534 jme_request_irq(struct jme_adapter *jme)
1535 {
1536         int rc;
1537         struct net_device *netdev = jme->dev;
1538         irq_handler_t handler = jme_intr;
1539         int irq_flags = IRQF_SHARED;
1540
1541         if (!pci_enable_msi(jme->pdev)) {
1542                 set_bit(JME_FLAG_MSI, &jme->flags);
1543                 handler = jme_msi;
1544                 irq_flags = 0;
1545         }
1546
1547         rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1548                           netdev);
1549         if (rc) {
1550                 netdev_err(netdev,
1551                            "Unable to request %s interrupt (return: %d)\n",
1552                            test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1553                            rc);
1554
1555                 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1556                         pci_disable_msi(jme->pdev);
1557                         clear_bit(JME_FLAG_MSI, &jme->flags);
1558                 }
1559         } else {
1560                 netdev->irq = jme->pdev->irq;
1561         }
1562
1563         return rc;
1564 }
1565
1566 static void
1567 jme_free_irq(struct jme_adapter *jme)
1568 {
1569         free_irq(jme->pdev->irq, jme->dev);
1570         if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1571                 pci_disable_msi(jme->pdev);
1572                 clear_bit(JME_FLAG_MSI, &jme->flags);
1573                 jme->dev->irq = jme->pdev->irq;
1574         }
1575 }
1576
1577 static int
1578 jme_open(struct net_device *netdev)
1579 {
1580         struct jme_adapter *jme = netdev_priv(netdev);
1581         int rc;
1582
1583         jme_clear_pm(jme);
1584         JME_NAPI_ENABLE(jme);
1585
1586         tasklet_enable(&jme->linkch_task);
1587         tasklet_enable(&jme->txclean_task);
1588         tasklet_hi_enable(&jme->rxclean_task);
1589         tasklet_hi_enable(&jme->rxempty_task);
1590
1591         rc = jme_request_irq(jme);
1592         if (rc)
1593                 goto err_out;
1594
1595         jme_start_irq(jme);
1596
1597         if (test_bit(JME_FLAG_SSET, &jme->flags))
1598                 jme_set_settings(netdev, &jme->old_ecmd);
1599         else
1600                 jme_reset_phy_processor(jme);
1601
1602         jme_reset_link(jme);
1603
1604         return 0;
1605
1606 err_out:
1607         netif_stop_queue(netdev);
1608         netif_carrier_off(netdev);
1609         return rc;
1610 }
1611
1612 #ifdef CONFIG_PM
1613 static void
1614 jme_set_100m_half(struct jme_adapter *jme)
1615 {
1616         u32 bmcr, tmp;
1617
1618         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1619         tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1620                        BMCR_SPEED1000 | BMCR_FULLDPLX);
1621         tmp |= BMCR_SPEED100;
1622
1623         if (bmcr != tmp)
1624                 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1625
1626         if (jme->fpgaver)
1627                 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1628         else
1629                 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1630 }
1631
1632 #define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1633 static void
1634 jme_wait_link(struct jme_adapter *jme)
1635 {
1636         u32 phylink, to = JME_WAIT_LINK_TIME;
1637
1638         mdelay(1000);
1639         phylink = jme_linkstat_from_phy(jme);
1640         while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1641                 mdelay(10);
1642                 phylink = jme_linkstat_from_phy(jme);
1643         }
1644 }
1645 #endif
1646
1647 static inline void
1648 jme_phy_off(struct jme_adapter *jme)
1649 {
1650         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
1651 }
1652
1653 static int
1654 jme_close(struct net_device *netdev)
1655 {
1656         struct jme_adapter *jme = netdev_priv(netdev);
1657
1658         netif_stop_queue(netdev);
1659         netif_carrier_off(netdev);
1660
1661         jme_stop_irq(jme);
1662         jme_free_irq(jme);
1663
1664         JME_NAPI_DISABLE(jme);
1665
1666         tasklet_disable(&jme->linkch_task);
1667         tasklet_disable(&jme->txclean_task);
1668         tasklet_disable(&jme->rxclean_task);
1669         tasklet_disable(&jme->rxempty_task);
1670
1671         jme_reset_ghc_speed(jme);
1672         jme_disable_rx_engine(jme);
1673         jme_disable_tx_engine(jme);
1674         jme_reset_mac_processor(jme);
1675         jme_free_rx_resources(jme);
1676         jme_free_tx_resources(jme);
1677         jme->phylink = 0;
1678         jme_phy_off(jme);
1679
1680         return 0;
1681 }
1682
1683 static int
1684 jme_alloc_txdesc(struct jme_adapter *jme,
1685                         struct sk_buff *skb)
1686 {
1687         struct jme_ring *txring = &(jme->txring[0]);
1688         int idx, nr_alloc, mask = jme->tx_ring_mask;
1689
1690         idx = txring->next_to_use;
1691         nr_alloc = skb_shinfo(skb)->nr_frags + 2;
1692
1693         if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
1694                 return -1;
1695
1696         atomic_sub(nr_alloc, &txring->nr_free);
1697
1698         txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
1699
1700         return idx;
1701 }
1702
1703 static void
1704 jme_fill_tx_map(struct pci_dev *pdev,
1705                 struct txdesc *txdesc,
1706                 struct jme_buffer_info *txbi,
1707                 struct page *page,
1708                 u32 page_offset,
1709                 u32 len,
1710                 u8 hidma)
1711 {
1712         dma_addr_t dmaaddr;
1713
1714         dmaaddr = pci_map_page(pdev,
1715                                 page,
1716                                 page_offset,
1717                                 len,
1718                                 PCI_DMA_TODEVICE);
1719
1720         pci_dma_sync_single_for_device(pdev,
1721                                        dmaaddr,
1722                                        len,
1723                                        PCI_DMA_TODEVICE);
1724
1725         txdesc->dw[0] = 0;
1726         txdesc->dw[1] = 0;
1727         txdesc->desc2.flags     = TXFLAG_OWN;
1728         txdesc->desc2.flags     |= (hidma) ? TXFLAG_64BIT : 0;
1729         txdesc->desc2.datalen   = cpu_to_le16(len);
1730         txdesc->desc2.bufaddrh  = cpu_to_le32((__u64)dmaaddr >> 32);
1731         txdesc->desc2.bufaddrl  = cpu_to_le32(
1732                                         (__u64)dmaaddr & 0xFFFFFFFFUL);
1733
1734         txbi->mapping = dmaaddr;
1735         txbi->len = len;
1736 }
1737
1738 static void
1739 jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1740 {
1741         struct jme_ring *txring = &(jme->txring[0]);
1742         struct txdesc *txdesc = txring->desc, *ctxdesc;
1743         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
1744         u8 hidma = jme->dev->features & NETIF_F_HIGHDMA;
1745         int i, nr_frags = skb_shinfo(skb)->nr_frags;
1746         int mask = jme->tx_ring_mask;
1747         struct skb_frag_struct *frag;
1748         u32 len;
1749
1750         for (i = 0 ; i < nr_frags ; ++i) {
1751                 frag = &skb_shinfo(skb)->frags[i];
1752                 ctxdesc = txdesc + ((idx + i + 2) & (mask));
1753                 ctxbi = txbi + ((idx + i + 2) & (mask));
1754
1755                 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page,
1756                                  frag->page_offset, frag->size, hidma);
1757         }
1758
1759         len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
1760         ctxdesc = txdesc + ((idx + 1) & (mask));
1761         ctxbi = txbi + ((idx + 1) & (mask));
1762         jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
1763                         offset_in_page(skb->data), len, hidma);
1764
1765 }
1766
1767 static int
1768 jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
1769 {
1770         if (unlikely(skb_shinfo(skb)->gso_size &&
1771                         skb_header_cloned(skb) &&
1772                         pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
1773                 dev_kfree_skb(skb);
1774                 return -1;
1775         }
1776
1777         return 0;
1778 }
1779
1780 static int
1781 jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
1782 {
1783         *mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
1784         if (*mss) {
1785                 *flags |= TXFLAG_LSEN;
1786
1787                 if (skb->protocol == htons(ETH_P_IP)) {
1788                         struct iphdr *iph = ip_hdr(skb);
1789
1790                         iph->check = 0;
1791                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1792                                                                 iph->daddr, 0,
1793                                                                 IPPROTO_TCP,
1794                                                                 0);
1795                 } else {
1796                         struct ipv6hdr *ip6h = ipv6_hdr(skb);
1797
1798                         tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr,
1799                                                                 &ip6h->daddr, 0,
1800                                                                 IPPROTO_TCP,
1801                                                                 0);
1802                 }
1803
1804                 return 0;
1805         }
1806
1807         return 1;
1808 }
1809
1810 static void
1811 jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
1812 {
1813         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1814                 u8 ip_proto;
1815
1816                 switch (skb->protocol) {
1817                 case htons(ETH_P_IP):
1818                         ip_proto = ip_hdr(skb)->protocol;
1819                         break;
1820                 case htons(ETH_P_IPV6):
1821                         ip_proto = ipv6_hdr(skb)->nexthdr;
1822                         break;
1823                 default:
1824                         ip_proto = 0;
1825                         break;
1826                 }
1827
1828                 switch (ip_proto) {
1829                 case IPPROTO_TCP:
1830                         *flags |= TXFLAG_TCPCS;
1831                         break;
1832                 case IPPROTO_UDP:
1833                         *flags |= TXFLAG_UDPCS;
1834                         break;
1835                 default:
1836                         netif_err(jme, tx_err, jme->dev, "Error upper layer protocol\n");
1837                         break;
1838                 }
1839         }
1840 }
1841
1842 static inline void
1843 jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
1844 {
1845         if (vlan_tx_tag_present(skb)) {
1846                 *flags |= TXFLAG_TAGON;
1847                 *vlan = cpu_to_le16(vlan_tx_tag_get(skb));
1848         }
1849 }
1850
1851 static int
1852 jme_fill_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1853 {
1854         struct jme_ring *txring = &(jme->txring[0]);
1855         struct txdesc *txdesc;
1856         struct jme_buffer_info *txbi;
1857         u8 flags;
1858
1859         txdesc = (struct txdesc *)txring->desc + idx;
1860         txbi = txring->bufinf + idx;
1861
1862         txdesc->dw[0] = 0;
1863         txdesc->dw[1] = 0;
1864         txdesc->dw[2] = 0;
1865         txdesc->dw[3] = 0;
1866         txdesc->desc1.pktsize = cpu_to_le16(skb->len);
1867         /*
1868          * Set OWN bit at final.
1869          * When kernel transmit faster than NIC.
1870          * And NIC trying to send this descriptor before we tell
1871          * it to start sending this TX queue.
1872          * Other fields are already filled correctly.
1873          */
1874         wmb();
1875         flags = TXFLAG_OWN | TXFLAG_INT;
1876         /*
1877          * Set checksum flags while not tso
1878          */
1879         if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
1880                 jme_tx_csum(jme, skb, &flags);
1881         jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
1882         jme_map_tx_skb(jme, skb, idx);
1883         txdesc->desc1.flags = flags;
1884         /*
1885          * Set tx buffer info after telling NIC to send
1886          * For better tx_clean timing
1887          */
1888         wmb();
1889         txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
1890         txbi->skb = skb;
1891         txbi->len = skb->len;
1892         txbi->start_xmit = jiffies;
1893         if (!txbi->start_xmit)
1894                 txbi->start_xmit = (0UL-1);
1895
1896         return 0;
1897 }
1898
1899 static void
1900 jme_stop_queue_if_full(struct jme_adapter *jme)
1901 {
1902         struct jme_ring *txring = &(jme->txring[0]);
1903         struct jme_buffer_info *txbi = txring->bufinf;
1904         int idx = atomic_read(&txring->next_to_clean);
1905
1906         txbi += idx;
1907
1908         smp_wmb();
1909         if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
1910                 netif_stop_queue(jme->dev);
1911                 netif_info(jme, tx_queued, jme->dev, "TX Queue Paused\n");
1912                 smp_wmb();
1913                 if (atomic_read(&txring->nr_free)
1914                         >= (jme->tx_wake_threshold)) {
1915                         netif_wake_queue(jme->dev);
1916                         netif_info(jme, tx_queued, jme->dev, "TX Queue Fast Waked\n");
1917                 }
1918         }
1919
1920         if (unlikely(txbi->start_xmit &&
1921                         (jiffies - txbi->start_xmit) >= TX_TIMEOUT &&
1922                         txbi->skb)) {
1923                 netif_stop_queue(jme->dev);
1924                 netif_info(jme, tx_queued, jme->dev,
1925                            "TX Queue Stopped %d@%lu\n", idx, jiffies);
1926         }
1927 }
1928
1929 /*
1930  * This function is already protected by netif_tx_lock()
1931  */
1932
1933 static netdev_tx_t
1934 jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
1935 {
1936         struct jme_adapter *jme = netdev_priv(netdev);
1937         int idx;
1938
1939         if (unlikely(jme_expand_header(jme, skb))) {
1940                 ++(NET_STAT(jme).tx_dropped);
1941                 return NETDEV_TX_OK;
1942         }
1943
1944         idx = jme_alloc_txdesc(jme, skb);
1945
1946         if (unlikely(idx < 0)) {
1947                 netif_stop_queue(netdev);
1948                 netif_err(jme, tx_err, jme->dev,
1949                           "BUG! Tx ring full when queue awake!\n");
1950
1951                 return NETDEV_TX_BUSY;
1952         }
1953
1954         jme_fill_tx_desc(jme, skb, idx);
1955
1956         jwrite32(jme, JME_TXCS, jme->reg_txcs |
1957                                 TXCS_SELECT_QUEUE0 |
1958                                 TXCS_QUEUE0S |
1959                                 TXCS_ENABLE);
1960
1961         tx_dbg(jme, "xmit: %d+%d@%lu\n",
1962                idx, skb_shinfo(skb)->nr_frags + 2, jiffies);
1963         jme_stop_queue_if_full(jme);
1964
1965         return NETDEV_TX_OK;
1966 }
1967
1968 static int
1969 jme_set_macaddr(struct net_device *netdev, void *p)
1970 {
1971         struct jme_adapter *jme = netdev_priv(netdev);
1972         struct sockaddr *addr = p;
1973         u32 val;
1974
1975         if (netif_running(netdev))
1976                 return -EBUSY;
1977
1978         spin_lock_bh(&jme->macaddr_lock);
1979         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1980
1981         val = (addr->sa_data[3] & 0xff) << 24 |
1982               (addr->sa_data[2] & 0xff) << 16 |
1983               (addr->sa_data[1] & 0xff) <<  8 |
1984               (addr->sa_data[0] & 0xff);
1985         jwrite32(jme, JME_RXUMA_LO, val);
1986         val = (addr->sa_data[5] & 0xff) << 8 |
1987               (addr->sa_data[4] & 0xff);
1988         jwrite32(jme, JME_RXUMA_HI, val);
1989         spin_unlock_bh(&jme->macaddr_lock);
1990
1991         return 0;
1992 }
1993
1994 static void
1995 jme_set_multi(struct net_device *netdev)
1996 {
1997         struct jme_adapter *jme = netdev_priv(netdev);
1998         u32 mc_hash[2] = {};
1999
2000         spin_lock_bh(&jme->rxmcs_lock);
2001
2002         jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
2003
2004         if (netdev->flags & IFF_PROMISC) {
2005                 jme->reg_rxmcs |= RXMCS_ALLFRAME;
2006         } else if (netdev->flags & IFF_ALLMULTI) {
2007                 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
2008         } else if (netdev->flags & IFF_MULTICAST) {
2009                 struct netdev_hw_addr *ha;
2010                 int bit_nr;
2011
2012                 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
2013                 netdev_for_each_mc_addr(ha, netdev) {
2014                         bit_nr = ether_crc(ETH_ALEN, ha->addr) & 0x3F;
2015                         mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
2016                 }
2017
2018                 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
2019                 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
2020         }
2021
2022         wmb();
2023         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2024
2025         spin_unlock_bh(&jme->rxmcs_lock);
2026 }
2027
2028 static int
2029 jme_change_mtu(struct net_device *netdev, int new_mtu)
2030 {
2031         struct jme_adapter *jme = netdev_priv(netdev);
2032
2033         if (new_mtu == jme->old_mtu)
2034                 return 0;
2035
2036         if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
2037                 ((new_mtu) < IPV6_MIN_MTU))
2038                 return -EINVAL;
2039
2040         if (new_mtu > 4000) {
2041                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2042                 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
2043                 jme_restart_rx_engine(jme);
2044         } else {
2045                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2046                 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
2047                 jme_restart_rx_engine(jme);
2048         }
2049
2050         if (new_mtu > 1900) {
2051                 netdev->features &= ~(NETIF_F_HW_CSUM |
2052                                 NETIF_F_TSO |
2053                                 NETIF_F_TSO6);
2054         } else {
2055                 if (test_bit(JME_FLAG_TXCSUM, &jme->flags))
2056                         netdev->features |= NETIF_F_HW_CSUM;
2057                 if (test_bit(JME_FLAG_TSO, &jme->flags))
2058                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2059         }
2060
2061         netdev->mtu = new_mtu;
2062         jme_reset_link(jme);
2063
2064         return 0;
2065 }
2066
2067 static void
2068 jme_tx_timeout(struct net_device *netdev)
2069 {
2070         struct jme_adapter *jme = netdev_priv(netdev);
2071
2072         jme->phylink = 0;
2073         jme_reset_phy_processor(jme);
2074         if (test_bit(JME_FLAG_SSET, &jme->flags))
2075                 jme_set_settings(netdev, &jme->old_ecmd);
2076
2077         /*
2078          * Force to Reset the link again
2079          */
2080         jme_reset_link(jme);
2081 }
2082
2083 static inline void jme_pause_rx(struct jme_adapter *jme)
2084 {
2085         atomic_dec(&jme->link_changing);
2086
2087         jme_set_rx_pcc(jme, PCC_OFF);
2088         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2089                 JME_NAPI_DISABLE(jme);
2090         } else {
2091                 tasklet_disable(&jme->rxclean_task);
2092                 tasklet_disable(&jme->rxempty_task);
2093         }
2094 }
2095
2096 static inline void jme_resume_rx(struct jme_adapter *jme)
2097 {
2098         struct dynpcc_info *dpi = &(jme->dpi);
2099
2100         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2101                 JME_NAPI_ENABLE(jme);
2102         } else {
2103                 tasklet_hi_enable(&jme->rxclean_task);
2104                 tasklet_hi_enable(&jme->rxempty_task);
2105         }
2106         dpi->cur                = PCC_P1;
2107         dpi->attempt            = PCC_P1;
2108         dpi->cnt                = 0;
2109         jme_set_rx_pcc(jme, PCC_P1);
2110
2111         atomic_inc(&jme->link_changing);
2112 }
2113
2114 static void
2115 jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2116 {
2117         struct jme_adapter *jme = netdev_priv(netdev);
2118
2119         jme_pause_rx(jme);
2120         jme->vlgrp = grp;
2121         jme_resume_rx(jme);
2122 }
2123
2124 static void
2125 jme_get_drvinfo(struct net_device *netdev,
2126                      struct ethtool_drvinfo *info)
2127 {
2128         struct jme_adapter *jme = netdev_priv(netdev);
2129
2130         strcpy(info->driver, DRV_NAME);
2131         strcpy(info->version, DRV_VERSION);
2132         strcpy(info->bus_info, pci_name(jme->pdev));
2133 }
2134
2135 static int
2136 jme_get_regs_len(struct net_device *netdev)
2137 {
2138         return JME_REG_LEN;
2139 }
2140
2141 static void
2142 mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2143 {
2144         int i;
2145
2146         for (i = 0 ; i < len ; i += 4)
2147                 p[i >> 2] = jread32(jme, reg + i);
2148 }
2149
2150 static void
2151 mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2152 {
2153         int i;
2154         u16 *p16 = (u16 *)p;
2155
2156         for (i = 0 ; i < reg_nr ; ++i)
2157                 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2158 }
2159
2160 static void
2161 jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2162 {
2163         struct jme_adapter *jme = netdev_priv(netdev);
2164         u32 *p32 = (u32 *)p;
2165
2166         memset(p, 0xFF, JME_REG_LEN);
2167
2168         regs->version = 1;
2169         mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2170
2171         p32 += 0x100 >> 2;
2172         mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2173
2174         p32 += 0x100 >> 2;
2175         mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2176
2177         p32 += 0x100 >> 2;
2178         mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2179
2180         p32 += 0x100 >> 2;
2181         mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2182 }
2183
2184 static int
2185 jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2186 {
2187         struct jme_adapter *jme = netdev_priv(netdev);
2188
2189         ecmd->tx_coalesce_usecs = PCC_TX_TO;
2190         ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2191
2192         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2193                 ecmd->use_adaptive_rx_coalesce = false;
2194                 ecmd->rx_coalesce_usecs = 0;
2195                 ecmd->rx_max_coalesced_frames = 0;
2196                 return 0;
2197         }
2198
2199         ecmd->use_adaptive_rx_coalesce = true;
2200
2201         switch (jme->dpi.cur) {
2202         case PCC_P1:
2203                 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2204                 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2205                 break;
2206         case PCC_P2:
2207                 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2208                 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2209                 break;
2210         case PCC_P3:
2211                 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2212                 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2213                 break;
2214         default:
2215                 break;
2216         }
2217
2218         return 0;
2219 }
2220
2221 static int
2222 jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2223 {
2224         struct jme_adapter *jme = netdev_priv(netdev);
2225         struct dynpcc_info *dpi = &(jme->dpi);
2226
2227         if (netif_running(netdev))
2228                 return -EBUSY;
2229
2230         if (ecmd->use_adaptive_rx_coalesce &&
2231             test_bit(JME_FLAG_POLL, &jme->flags)) {
2232                 clear_bit(JME_FLAG_POLL, &jme->flags);
2233                 jme->jme_rx = netif_rx;
2234                 jme->jme_vlan_rx = vlan_hwaccel_rx;
2235                 dpi->cur                = PCC_P1;
2236                 dpi->attempt            = PCC_P1;
2237                 dpi->cnt                = 0;
2238                 jme_set_rx_pcc(jme, PCC_P1);
2239                 jme_interrupt_mode(jme);
2240         } else if (!(ecmd->use_adaptive_rx_coalesce) &&
2241                    !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2242                 set_bit(JME_FLAG_POLL, &jme->flags);
2243                 jme->jme_rx = netif_receive_skb;
2244                 jme->jme_vlan_rx = vlan_hwaccel_receive_skb;
2245                 jme_interrupt_mode(jme);
2246         }
2247
2248         return 0;
2249 }
2250
2251 static void
2252 jme_get_pauseparam(struct net_device *netdev,
2253                         struct ethtool_pauseparam *ecmd)
2254 {
2255         struct jme_adapter *jme = netdev_priv(netdev);
2256         u32 val;
2257
2258         ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2259         ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2260
2261         spin_lock_bh(&jme->phy_lock);
2262         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2263         spin_unlock_bh(&jme->phy_lock);
2264
2265         ecmd->autoneg =
2266                 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2267 }
2268
2269 static int
2270 jme_set_pauseparam(struct net_device *netdev,
2271                         struct ethtool_pauseparam *ecmd)
2272 {
2273         struct jme_adapter *jme = netdev_priv(netdev);
2274         u32 val;
2275
2276         if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2277                 (ecmd->tx_pause != 0)) {
2278
2279                 if (ecmd->tx_pause)
2280                         jme->reg_txpfc |= TXPFC_PF_EN;
2281                 else
2282                         jme->reg_txpfc &= ~TXPFC_PF_EN;
2283
2284                 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2285         }
2286
2287         spin_lock_bh(&jme->rxmcs_lock);
2288         if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2289                 (ecmd->rx_pause != 0)) {
2290
2291                 if (ecmd->rx_pause)
2292                         jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2293                 else
2294                         jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2295
2296                 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2297         }
2298         spin_unlock_bh(&jme->rxmcs_lock);
2299
2300         spin_lock_bh(&jme->phy_lock);
2301         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2302         if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2303                 (ecmd->autoneg != 0)) {
2304
2305                 if (ecmd->autoneg)
2306                         val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2307                 else
2308                         val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2309
2310                 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2311                                 MII_ADVERTISE, val);
2312         }
2313         spin_unlock_bh(&jme->phy_lock);
2314
2315         return 0;
2316 }
2317
2318 static void
2319 jme_get_wol(struct net_device *netdev,
2320                 struct ethtool_wolinfo *wol)
2321 {
2322         struct jme_adapter *jme = netdev_priv(netdev);
2323
2324         wol->supported = WAKE_MAGIC | WAKE_PHY;
2325
2326         wol->wolopts = 0;
2327
2328         if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2329                 wol->wolopts |= WAKE_PHY;
2330
2331         if (jme->reg_pmcs & PMCS_MFEN)
2332                 wol->wolopts |= WAKE_MAGIC;
2333
2334 }
2335
2336 static int
2337 jme_set_wol(struct net_device *netdev,
2338                 struct ethtool_wolinfo *wol)
2339 {
2340         struct jme_adapter *jme = netdev_priv(netdev);
2341
2342         if (wol->wolopts & (WAKE_MAGICSECURE |
2343                                 WAKE_UCAST |
2344                                 WAKE_MCAST |
2345                                 WAKE_BCAST |
2346                                 WAKE_ARP))
2347                 return -EOPNOTSUPP;
2348
2349         jme->reg_pmcs = 0;
2350
2351         if (wol->wolopts & WAKE_PHY)
2352                 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2353
2354         if (wol->wolopts & WAKE_MAGIC)
2355                 jme->reg_pmcs |= PMCS_MFEN;
2356
2357         jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2358
2359         return 0;
2360 }
2361
2362 static int
2363 jme_get_settings(struct net_device *netdev,
2364                      struct ethtool_cmd *ecmd)
2365 {
2366         struct jme_adapter *jme = netdev_priv(netdev);
2367         int rc;
2368
2369         spin_lock_bh(&jme->phy_lock);
2370         rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2371         spin_unlock_bh(&jme->phy_lock);
2372         return rc;
2373 }
2374
2375 static int
2376 jme_set_settings(struct net_device *netdev,
2377                      struct ethtool_cmd *ecmd)
2378 {
2379         struct jme_adapter *jme = netdev_priv(netdev);
2380         int rc, fdc = 0;
2381
2382         if (ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE)
2383                 return -EINVAL;
2384
2385         if (jme->mii_if.force_media &&
2386         ecmd->autoneg != AUTONEG_ENABLE &&
2387         (jme->mii_if.full_duplex != ecmd->duplex))
2388                 fdc = 1;
2389
2390         spin_lock_bh(&jme->phy_lock);
2391         rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2392         spin_unlock_bh(&jme->phy_lock);
2393
2394         if (!rc && fdc)
2395                 jme_reset_link(jme);
2396
2397         if (!rc) {
2398                 set_bit(JME_FLAG_SSET, &jme->flags);
2399                 jme->old_ecmd = *ecmd;
2400         }
2401
2402         return rc;
2403 }
2404
2405 static u32
2406 jme_get_link(struct net_device *netdev)
2407 {
2408         struct jme_adapter *jme = netdev_priv(netdev);
2409         return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2410 }
2411
2412 static u32
2413 jme_get_msglevel(struct net_device *netdev)
2414 {
2415         struct jme_adapter *jme = netdev_priv(netdev);
2416         return jme->msg_enable;
2417 }
2418
2419 static void
2420 jme_set_msglevel(struct net_device *netdev, u32 value)
2421 {
2422         struct jme_adapter *jme = netdev_priv(netdev);
2423         jme->msg_enable = value;
2424 }
2425
2426 static u32
2427 jme_get_rx_csum(struct net_device *netdev)
2428 {
2429         struct jme_adapter *jme = netdev_priv(netdev);
2430         return jme->reg_rxmcs & RXMCS_CHECKSUM;
2431 }
2432
2433 static int
2434 jme_set_rx_csum(struct net_device *netdev, u32 on)
2435 {
2436         struct jme_adapter *jme = netdev_priv(netdev);
2437
2438         spin_lock_bh(&jme->rxmcs_lock);
2439         if (on)
2440                 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2441         else
2442                 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2443         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2444         spin_unlock_bh(&jme->rxmcs_lock);
2445
2446         return 0;
2447 }
2448
2449 static int
2450 jme_set_tx_csum(struct net_device *netdev, u32 on)
2451 {
2452         struct jme_adapter *jme = netdev_priv(netdev);
2453
2454         if (on) {
2455                 set_bit(JME_FLAG_TXCSUM, &jme->flags);
2456                 if (netdev->mtu <= 1900)
2457                         netdev->features |= NETIF_F_HW_CSUM;
2458         } else {
2459                 clear_bit(JME_FLAG_TXCSUM, &jme->flags);
2460                 netdev->features &= ~NETIF_F_HW_CSUM;
2461         }
2462
2463         return 0;
2464 }
2465
2466 static int
2467 jme_set_tso(struct net_device *netdev, u32 on)
2468 {
2469         struct jme_adapter *jme = netdev_priv(netdev);
2470
2471         if (on) {
2472                 set_bit(JME_FLAG_TSO, &jme->flags);
2473                 if (netdev->mtu <= 1900)
2474                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2475         } else {
2476                 clear_bit(JME_FLAG_TSO, &jme->flags);
2477                 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
2478         }
2479
2480         return 0;
2481 }
2482
2483 static int
2484 jme_nway_reset(struct net_device *netdev)
2485 {
2486         struct jme_adapter *jme = netdev_priv(netdev);
2487         jme_restart_an(jme);
2488         return 0;
2489 }
2490
2491 static u8
2492 jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2493 {
2494         u32 val;
2495         int to;
2496
2497         val = jread32(jme, JME_SMBCSR);
2498         to = JME_SMB_BUSY_TIMEOUT;
2499         while ((val & SMBCSR_BUSY) && --to) {
2500                 msleep(1);
2501                 val = jread32(jme, JME_SMBCSR);
2502         }
2503         if (!to) {
2504                 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2505                 return 0xFF;
2506         }
2507
2508         jwrite32(jme, JME_SMBINTF,
2509                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2510                 SMBINTF_HWRWN_READ |
2511                 SMBINTF_HWCMD);
2512
2513         val = jread32(jme, JME_SMBINTF);
2514         to = JME_SMB_BUSY_TIMEOUT;
2515         while ((val & SMBINTF_HWCMD) && --to) {
2516                 msleep(1);
2517                 val = jread32(jme, JME_SMBINTF);
2518         }
2519         if (!to) {
2520                 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2521                 return 0xFF;
2522         }
2523
2524         return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2525 }
2526
2527 static void
2528 jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2529 {
2530         u32 val;
2531         int to;
2532
2533         val = jread32(jme, JME_SMBCSR);
2534         to = JME_SMB_BUSY_TIMEOUT;
2535         while ((val & SMBCSR_BUSY) && --to) {
2536                 msleep(1);
2537                 val = jread32(jme, JME_SMBCSR);
2538         }
2539         if (!to) {
2540                 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2541                 return;
2542         }
2543
2544         jwrite32(jme, JME_SMBINTF,
2545                 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2546                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2547                 SMBINTF_HWRWN_WRITE |
2548                 SMBINTF_HWCMD);
2549
2550         val = jread32(jme, JME_SMBINTF);
2551         to = JME_SMB_BUSY_TIMEOUT;
2552         while ((val & SMBINTF_HWCMD) && --to) {
2553                 msleep(1);
2554                 val = jread32(jme, JME_SMBINTF);
2555         }
2556         if (!to) {
2557                 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2558                 return;
2559         }
2560
2561         mdelay(2);
2562 }
2563
2564 static int
2565 jme_get_eeprom_len(struct net_device *netdev)
2566 {
2567         struct jme_adapter *jme = netdev_priv(netdev);
2568         u32 val;
2569         val = jread32(jme, JME_SMBCSR);
2570         return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2571 }
2572
2573 static int
2574 jme_get_eeprom(struct net_device *netdev,
2575                 struct ethtool_eeprom *eeprom, u8 *data)
2576 {
2577         struct jme_adapter *jme = netdev_priv(netdev);
2578         int i, offset = eeprom->offset, len = eeprom->len;
2579
2580         /*
2581          * ethtool will check the boundary for us
2582          */
2583         eeprom->magic = JME_EEPROM_MAGIC;
2584         for (i = 0 ; i < len ; ++i)
2585                 data[i] = jme_smb_read(jme, i + offset);
2586
2587         return 0;
2588 }
2589
2590 static int
2591 jme_set_eeprom(struct net_device *netdev,
2592                 struct ethtool_eeprom *eeprom, u8 *data)
2593 {
2594         struct jme_adapter *jme = netdev_priv(netdev);
2595         int i, offset = eeprom->offset, len = eeprom->len;
2596
2597         if (eeprom->magic != JME_EEPROM_MAGIC)
2598                 return -EINVAL;
2599
2600         /*
2601          * ethtool will check the boundary for us
2602          */
2603         for (i = 0 ; i < len ; ++i)
2604                 jme_smb_write(jme, i + offset, data[i]);
2605
2606         return 0;
2607 }
2608
2609 static const struct ethtool_ops jme_ethtool_ops = {
2610         .get_drvinfo            = jme_get_drvinfo,
2611         .get_regs_len           = jme_get_regs_len,
2612         .get_regs               = jme_get_regs,
2613         .get_coalesce           = jme_get_coalesce,
2614         .set_coalesce           = jme_set_coalesce,
2615         .get_pauseparam         = jme_get_pauseparam,
2616         .set_pauseparam         = jme_set_pauseparam,
2617         .get_wol                = jme_get_wol,
2618         .set_wol                = jme_set_wol,
2619         .get_settings           = jme_get_settings,
2620         .set_settings           = jme_set_settings,
2621         .get_link               = jme_get_link,
2622         .get_msglevel           = jme_get_msglevel,
2623         .set_msglevel           = jme_set_msglevel,
2624         .get_rx_csum            = jme_get_rx_csum,
2625         .set_rx_csum            = jme_set_rx_csum,
2626         .set_tx_csum            = jme_set_tx_csum,
2627         .set_tso                = jme_set_tso,
2628         .set_sg                 = ethtool_op_set_sg,
2629         .nway_reset             = jme_nway_reset,
2630         .get_eeprom_len         = jme_get_eeprom_len,
2631         .get_eeprom             = jme_get_eeprom,
2632         .set_eeprom             = jme_set_eeprom,
2633 };
2634
2635 static int
2636 jme_pci_dma64(struct pci_dev *pdev)
2637 {
2638         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2639             !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
2640                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
2641                         return 1;
2642
2643         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2644             !pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
2645                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)))
2646                         return 1;
2647
2648         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
2649                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2650                         return 0;
2651
2652         return -1;
2653 }
2654
2655 static inline void
2656 jme_phy_init(struct jme_adapter *jme)
2657 {
2658         u16 reg26;
2659
2660         reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2661         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2662 }
2663
2664 static inline void
2665 jme_check_hw_ver(struct jme_adapter *jme)
2666 {
2667         u32 chipmode;
2668
2669         chipmode = jread32(jme, JME_CHIPMODE);
2670
2671         jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2672         jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2673 }
2674
2675 static const struct net_device_ops jme_netdev_ops = {
2676         .ndo_open               = jme_open,
2677         .ndo_stop               = jme_close,
2678         .ndo_validate_addr      = eth_validate_addr,
2679         .ndo_start_xmit         = jme_start_xmit,
2680         .ndo_set_mac_address    = jme_set_macaddr,
2681         .ndo_set_multicast_list = jme_set_multi,
2682         .ndo_change_mtu         = jme_change_mtu,
2683         .ndo_tx_timeout         = jme_tx_timeout,
2684         .ndo_vlan_rx_register   = jme_vlan_rx_register,
2685 };
2686
2687 static int __devinit
2688 jme_init_one(struct pci_dev *pdev,
2689              const struct pci_device_id *ent)
2690 {
2691         int rc = 0, using_dac, i;
2692         struct net_device *netdev;
2693         struct jme_adapter *jme;
2694         u16 bmcr, bmsr;
2695         u32 apmc;
2696
2697         /*
2698          * set up PCI device basics
2699          */
2700         rc = pci_enable_device(pdev);
2701         if (rc) {
2702                 pr_err("Cannot enable PCI device\n");
2703                 goto err_out;
2704         }
2705
2706         using_dac = jme_pci_dma64(pdev);
2707         if (using_dac < 0) {
2708                 pr_err("Cannot set PCI DMA Mask\n");
2709                 rc = -EIO;
2710                 goto err_out_disable_pdev;
2711         }
2712
2713         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2714                 pr_err("No PCI resource region found\n");
2715                 rc = -ENOMEM;
2716                 goto err_out_disable_pdev;
2717         }
2718
2719         rc = pci_request_regions(pdev, DRV_NAME);
2720         if (rc) {
2721                 pr_err("Cannot obtain PCI resource region\n");
2722                 goto err_out_disable_pdev;
2723         }
2724
2725         pci_set_master(pdev);
2726
2727         /*
2728          * alloc and init net device
2729          */
2730         netdev = alloc_etherdev(sizeof(*jme));
2731         if (!netdev) {
2732                 pr_err("Cannot allocate netdev structure\n");
2733                 rc = -ENOMEM;
2734                 goto err_out_release_regions;
2735         }
2736         netdev->netdev_ops = &jme_netdev_ops;
2737         netdev->ethtool_ops             = &jme_ethtool_ops;
2738         netdev->watchdog_timeo          = TX_TIMEOUT;
2739         netdev->features                =       NETIF_F_HW_CSUM |
2740                                                 NETIF_F_SG |
2741                                                 NETIF_F_TSO |
2742                                                 NETIF_F_TSO6 |
2743                                                 NETIF_F_HW_VLAN_TX |
2744                                                 NETIF_F_HW_VLAN_RX;
2745         if (using_dac)
2746                 netdev->features        |=      NETIF_F_HIGHDMA;
2747
2748         SET_NETDEV_DEV(netdev, &pdev->dev);
2749         pci_set_drvdata(pdev, netdev);
2750
2751         /*
2752          * init adapter info
2753          */
2754         jme = netdev_priv(netdev);
2755         jme->pdev = pdev;
2756         jme->dev = netdev;
2757         jme->jme_rx = netif_rx;
2758         jme->jme_vlan_rx = vlan_hwaccel_rx;
2759         jme->old_mtu = netdev->mtu = 1500;
2760         jme->phylink = 0;
2761         jme->tx_ring_size = 1 << 10;
2762         jme->tx_ring_mask = jme->tx_ring_size - 1;
2763         jme->tx_wake_threshold = 1 << 9;
2764         jme->rx_ring_size = 1 << 9;
2765         jme->rx_ring_mask = jme->rx_ring_size - 1;
2766         jme->msg_enable = JME_DEF_MSG_ENABLE;
2767         jme->regs = ioremap(pci_resource_start(pdev, 0),
2768                              pci_resource_len(pdev, 0));
2769         if (!(jme->regs)) {
2770                 pr_err("Mapping PCI resource region error\n");
2771                 rc = -ENOMEM;
2772                 goto err_out_free_netdev;
2773         }
2774
2775         if (no_pseudohp) {
2776                 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2777                 jwrite32(jme, JME_APMC, apmc);
2778         } else if (force_pseudohp) {
2779                 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2780                 jwrite32(jme, JME_APMC, apmc);
2781         }
2782
2783         NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2784
2785         spin_lock_init(&jme->phy_lock);
2786         spin_lock_init(&jme->macaddr_lock);
2787         spin_lock_init(&jme->rxmcs_lock);
2788
2789         atomic_set(&jme->link_changing, 1);
2790         atomic_set(&jme->rx_cleaning, 1);
2791         atomic_set(&jme->tx_cleaning, 1);
2792         atomic_set(&jme->rx_empty, 1);
2793
2794         tasklet_init(&jme->pcc_task,
2795                      jme_pcc_tasklet,
2796                      (unsigned long) jme);
2797         tasklet_init(&jme->linkch_task,
2798                      jme_link_change_tasklet,
2799                      (unsigned long) jme);
2800         tasklet_init(&jme->txclean_task,
2801                      jme_tx_clean_tasklet,
2802                      (unsigned long) jme);
2803         tasklet_init(&jme->rxclean_task,
2804                      jme_rx_clean_tasklet,
2805                      (unsigned long) jme);
2806         tasklet_init(&jme->rxempty_task,
2807                      jme_rx_empty_tasklet,
2808                      (unsigned long) jme);
2809         tasklet_disable_nosync(&jme->linkch_task);
2810         tasklet_disable_nosync(&jme->txclean_task);
2811         tasklet_disable_nosync(&jme->rxclean_task);
2812         tasklet_disable_nosync(&jme->rxempty_task);
2813         jme->dpi.cur = PCC_P1;
2814
2815         jme->reg_ghc = 0;
2816         jme->reg_rxcs = RXCS_DEFAULT;
2817         jme->reg_rxmcs = RXMCS_DEFAULT;
2818         jme->reg_txpfc = 0;
2819         jme->reg_pmcs = PMCS_MFEN;
2820         set_bit(JME_FLAG_TXCSUM, &jme->flags);
2821         set_bit(JME_FLAG_TSO, &jme->flags);
2822
2823         /*
2824          * Get Max Read Req Size from PCI Config Space
2825          */
2826         pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
2827         jme->mrrs &= PCI_DCSR_MRRS_MASK;
2828         switch (jme->mrrs) {
2829         case MRRS_128B:
2830                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
2831                 break;
2832         case MRRS_256B:
2833                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
2834                 break;
2835         default:
2836                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
2837                 break;
2838         }
2839
2840         /*
2841          * Must check before reset_mac_processor
2842          */
2843         jme_check_hw_ver(jme);
2844         jme->mii_if.dev = netdev;
2845         if (jme->fpgaver) {
2846                 jme->mii_if.phy_id = 0;
2847                 for (i = 1 ; i < 32 ; ++i) {
2848                         bmcr = jme_mdio_read(netdev, i, MII_BMCR);
2849                         bmsr = jme_mdio_read(netdev, i, MII_BMSR);
2850                         if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
2851                                 jme->mii_if.phy_id = i;
2852                                 break;
2853                         }
2854                 }
2855
2856                 if (!jme->mii_if.phy_id) {
2857                         rc = -EIO;
2858                         pr_err("Can not find phy_id\n");
2859                         goto err_out_unmap;
2860                 }
2861
2862                 jme->reg_ghc |= GHC_LINK_POLL;
2863         } else {
2864                 jme->mii_if.phy_id = 1;
2865         }
2866         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
2867                 jme->mii_if.supports_gmii = true;
2868         else
2869                 jme->mii_if.supports_gmii = false;
2870         jme->mii_if.mdio_read = jme_mdio_read;
2871         jme->mii_if.mdio_write = jme_mdio_write;
2872
2873         jme_clear_pm(jme);
2874         jme_set_phyfifoa(jme);
2875         pci_read_config_byte(pdev, PCI_REVISION_ID, &jme->rev);
2876         if (!jme->fpgaver)
2877                 jme_phy_init(jme);
2878         jme_phy_off(jme);
2879
2880         /*
2881          * Reset MAC processor and reload EEPROM for MAC Address
2882          */
2883         jme_reset_mac_processor(jme);
2884         rc = jme_reload_eeprom(jme);
2885         if (rc) {
2886                 pr_err("Reload eeprom for reading MAC Address error\n");
2887                 goto err_out_unmap;
2888         }
2889         jme_load_macaddr(netdev);
2890
2891         /*
2892          * Tell stack that we are not ready to work until open()
2893          */
2894         netif_carrier_off(netdev);
2895         netif_stop_queue(netdev);
2896
2897         /*
2898          * Register netdev
2899          */
2900         rc = register_netdev(netdev);
2901         if (rc) {
2902                 pr_err("Cannot register net device\n");
2903                 goto err_out_unmap;
2904         }
2905
2906         netif_info(jme, probe, jme->dev, "%s%s ver:%x rev:%x macaddr:%pM\n",
2907                    (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
2908                    "JMC250 Gigabit Ethernet" :
2909                    (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
2910                    "JMC260 Fast Ethernet" : "Unknown",
2911                    (jme->fpgaver != 0) ? " (FPGA)" : "",
2912                    (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
2913                    jme->rev, netdev->dev_addr);
2914
2915         return 0;
2916
2917 err_out_unmap:
2918         iounmap(jme->regs);
2919 err_out_free_netdev:
2920         pci_set_drvdata(pdev, NULL);
2921         free_netdev(netdev);
2922 err_out_release_regions:
2923         pci_release_regions(pdev);
2924 err_out_disable_pdev:
2925         pci_disable_device(pdev);
2926 err_out:
2927         return rc;
2928 }
2929
2930 static void __devexit
2931 jme_remove_one(struct pci_dev *pdev)
2932 {
2933         struct net_device *netdev = pci_get_drvdata(pdev);
2934         struct jme_adapter *jme = netdev_priv(netdev);
2935
2936         unregister_netdev(netdev);
2937         iounmap(jme->regs);
2938         pci_set_drvdata(pdev, NULL);
2939         free_netdev(netdev);
2940         pci_release_regions(pdev);
2941         pci_disable_device(pdev);
2942
2943 }
2944
2945 #ifdef CONFIG_PM
2946 static int
2947 jme_suspend(struct pci_dev *pdev, pm_message_t state)
2948 {
2949         struct net_device *netdev = pci_get_drvdata(pdev);
2950         struct jme_adapter *jme = netdev_priv(netdev);
2951
2952         atomic_dec(&jme->link_changing);
2953
2954         netif_device_detach(netdev);
2955         netif_stop_queue(netdev);
2956         jme_stop_irq(jme);
2957
2958         tasklet_disable(&jme->txclean_task);
2959         tasklet_disable(&jme->rxclean_task);
2960         tasklet_disable(&jme->rxempty_task);
2961
2962         if (netif_carrier_ok(netdev)) {
2963                 if (test_bit(JME_FLAG_POLL, &jme->flags))
2964                         jme_polling_mode(jme);
2965
2966                 jme_stop_pcc_timer(jme);
2967                 jme_reset_ghc_speed(jme);
2968                 jme_disable_rx_engine(jme);
2969                 jme_disable_tx_engine(jme);
2970                 jme_reset_mac_processor(jme);
2971                 jme_free_rx_resources(jme);
2972                 jme_free_tx_resources(jme);
2973                 netif_carrier_off(netdev);
2974                 jme->phylink = 0;
2975         }
2976
2977         tasklet_enable(&jme->txclean_task);
2978         tasklet_hi_enable(&jme->rxclean_task);
2979         tasklet_hi_enable(&jme->rxempty_task);
2980
2981         pci_save_state(pdev);
2982         if (jme->reg_pmcs) {
2983                 jme_set_100m_half(jme);
2984
2985                 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2986                         jme_wait_link(jme);
2987
2988                 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2989
2990                 pci_enable_wake(pdev, PCI_D3cold, true);
2991         } else {
2992                 jme_phy_off(jme);
2993         }
2994         pci_set_power_state(pdev, PCI_D3cold);
2995
2996         return 0;
2997 }
2998
2999 static int
3000 jme_resume(struct pci_dev *pdev)
3001 {
3002         struct net_device *netdev = pci_get_drvdata(pdev);
3003         struct jme_adapter *jme = netdev_priv(netdev);
3004
3005         jme_clear_pm(jme);
3006         pci_restore_state(pdev);
3007
3008         if (test_bit(JME_FLAG_SSET, &jme->flags))
3009                 jme_set_settings(netdev, &jme->old_ecmd);
3010         else
3011                 jme_reset_phy_processor(jme);
3012
3013         jme_start_irq(jme);
3014         netif_device_attach(netdev);
3015
3016         atomic_inc(&jme->link_changing);
3017
3018         jme_reset_link(jme);
3019
3020         return 0;
3021 }
3022 #endif
3023
3024 static DEFINE_PCI_DEVICE_TABLE(jme_pci_tbl) = {
3025         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
3026         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
3027         { }
3028 };
3029
3030 static struct pci_driver jme_driver = {
3031         .name           = DRV_NAME,
3032         .id_table       = jme_pci_tbl,
3033         .probe          = jme_init_one,
3034         .remove         = __devexit_p(jme_remove_one),
3035 #ifdef CONFIG_PM
3036         .suspend        = jme_suspend,
3037         .resume         = jme_resume,
3038 #endif /* CONFIG_PM */
3039 };
3040
3041 static int __init
3042 jme_init_module(void)
3043 {
3044         pr_info("JMicron JMC2XX ethernet driver version %s\n", DRV_VERSION);
3045         return pci_register_driver(&jme_driver);
3046 }
3047
3048 static void __exit
3049 jme_cleanup_module(void)
3050 {
3051         pci_unregister_driver(&jme_driver);
3052 }
3053
3054 module_init(jme_init_module);
3055 module_exit(jme_cleanup_module);
3056
3057 MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3058 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3059 MODULE_LICENSE("GPL");
3060 MODULE_VERSION(DRV_VERSION);
3061 MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3062