1 /* 2 * Copyright(c) 2007 Atheros Corporation. All rights reserved. 3 * 4 * Derived from Intel e1000 driver 5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 59 19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 */ 21 22 #include "atl1e.h" 23 24 #define DRV_VERSION "1.0.0.7-NAPI" 25 26 char atl1e_driver_name[] = "ATL1E"; 27 char atl1e_driver_version[] = DRV_VERSION; 28 #define PCI_DEVICE_ID_ATTANSIC_L1E 0x1026 29 /* 30 * atl1e_pci_tbl - PCI Device ID Table 31 * 32 * Wildcard entries (PCI_ANY_ID) should come last 33 * Last entry must be all 0s 34 * 35 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 36 * Class, Class Mask, private data (not used) } 37 */ 38 static DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = { 39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)}, 40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)}, 41 /* required last entry */ 42 { 0 } 43 }; 44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl); 45 46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>"); 47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver"); 48 MODULE_LICENSE("GPL"); 49 MODULE_VERSION(DRV_VERSION); 50 51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter); 52 53 static const u16 54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] = 55 { 56 {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD}, 57 {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD}, 58 {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD}, 59 {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD} 60 }; 61 62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] = 63 { 64 REG_RXF0_BASE_ADDR_HI, 65 REG_RXF1_BASE_ADDR_HI, 66 REG_RXF2_BASE_ADDR_HI, 67 REG_RXF3_BASE_ADDR_HI 68 }; 69 70 static const u16 71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] = 72 { 73 {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO}, 74 {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO}, 75 {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO}, 76 {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO} 77 }; 78 79 static const u16 80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] = 81 { 82 {REG_HOST_RXF0_MB0_LO, REG_HOST_RXF0_MB1_LO}, 83 {REG_HOST_RXF1_MB0_LO, REG_HOST_RXF1_MB1_LO}, 84 {REG_HOST_RXF2_MB0_LO, REG_HOST_RXF2_MB1_LO}, 85 {REG_HOST_RXF3_MB0_LO, REG_HOST_RXF3_MB1_LO} 86 }; 87 88 static const u16 atl1e_pay_load_size[] = { 89 128, 256, 512, 1024, 2048, 4096, 90 }; 91 92 /* 93 * atl1e_irq_enable - Enable default interrupt generation settings 94 * @adapter: board private structure 95 */ 96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter) 97 { 98 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 99 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 100 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK); 101 AT_WRITE_FLUSH(&adapter->hw); 102 } 103 } 104 105 /* 106 * atl1e_irq_disable - Mask off interrupt generation on the NIC 107 * @adapter: board private structure 108 */ 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter) 110 { 111 atomic_inc(&adapter->irq_sem); 112 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 113 AT_WRITE_FLUSH(&adapter->hw); 114 synchronize_irq(adapter->pdev->irq); 115 } 116 117 /* 118 * atl1e_irq_reset - reset interrupt confiure on the NIC 119 * @adapter: board private structure 120 */ 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter) 122 { 123 atomic_set(&adapter->irq_sem, 0); 124 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 125 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 126 AT_WRITE_FLUSH(&adapter->hw); 127 } 128 129 /* 130 * atl1e_phy_config - Timer Call-back 131 * @data: pointer to netdev cast into an unsigned long 132 */ 133 static void atl1e_phy_config(unsigned long data) 134 { 135 struct atl1e_adapter *adapter = (struct atl1e_adapter *) data; 136 struct atl1e_hw *hw = &adapter->hw; 137 unsigned long flags; 138 139 spin_lock_irqsave(&adapter->mdio_lock, flags); 140 atl1e_restart_autoneg(hw); 141 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 142 } 143 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter) 145 { 146 147 WARN_ON(in_interrupt()); 148 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 149 msleep(1); 150 atl1e_down(adapter); 151 atl1e_up(adapter); 152 clear_bit(__AT_RESETTING, &adapter->flags); 153 } 154 155 static void atl1e_reset_task(struct work_struct *work) 156 { 157 struct atl1e_adapter *adapter; 158 adapter = container_of(work, struct atl1e_adapter, reset_task); 159 160 atl1e_reinit_locked(adapter); 161 } 162 163 static int atl1e_check_link(struct atl1e_adapter *adapter) 164 { 165 struct atl1e_hw *hw = &adapter->hw; 166 struct net_device *netdev = adapter->netdev; 167 int err = 0; 168 u16 speed, duplex, phy_data; 169 170 /* MII_BMSR must read twice */ 171 atl1e_read_phy_reg(hw, MII_BMSR, &phy_data); 172 atl1e_read_phy_reg(hw, MII_BMSR, &phy_data); 173 if ((phy_data & BMSR_LSTATUS) == 0) { 174 /* link down */ 175 if (netif_carrier_ok(netdev)) { /* old link state: Up */ 176 u32 value; 177 /* disable rx */ 178 value = AT_READ_REG(hw, REG_MAC_CTRL); 179 value &= ~MAC_CTRL_RX_EN; 180 AT_WRITE_REG(hw, REG_MAC_CTRL, value); 181 adapter->link_speed = SPEED_0; 182 netif_carrier_off(netdev); 183 netif_stop_queue(netdev); 184 } 185 } else { 186 /* Link Up */ 187 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex); 188 if (unlikely(err)) 189 return err; 190 191 /* link result is our setting */ 192 if (adapter->link_speed != speed || 193 adapter->link_duplex != duplex) { 194 adapter->link_speed = speed; 195 adapter->link_duplex = duplex; 196 atl1e_setup_mac_ctrl(adapter); 197 netdev_info(netdev, 198 "NIC Link is Up <%d Mbps %s Duplex>\n", 199 adapter->link_speed, 200 adapter->link_duplex == FULL_DUPLEX ? 201 "Full" : "Half"); 202 } 203 204 if (!netif_carrier_ok(netdev)) { 205 /* Link down -> Up */ 206 netif_carrier_on(netdev); 207 netif_wake_queue(netdev); 208 } 209 } 210 return 0; 211 } 212 213 /* 214 * atl1e_link_chg_task - deal with link change event Out of interrupt context 215 * @netdev: network interface device structure 216 */ 217 static void atl1e_link_chg_task(struct work_struct *work) 218 { 219 struct atl1e_adapter *adapter; 220 unsigned long flags; 221 222 adapter = container_of(work, struct atl1e_adapter, link_chg_task); 223 spin_lock_irqsave(&adapter->mdio_lock, flags); 224 atl1e_check_link(adapter); 225 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 226 } 227 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter) 229 { 230 struct net_device *netdev = adapter->netdev; 231 u16 phy_data = 0; 232 u16 link_up = 0; 233 234 spin_lock(&adapter->mdio_lock); 235 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 236 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 237 spin_unlock(&adapter->mdio_lock); 238 link_up = phy_data & BMSR_LSTATUS; 239 /* notify upper layer link down ASAP */ 240 if (!link_up) { 241 if (netif_carrier_ok(netdev)) { 242 /* old link state: Up */ 243 netdev_info(netdev, "NIC Link is Down\n"); 244 adapter->link_speed = SPEED_0; 245 netif_stop_queue(netdev); 246 } 247 } 248 schedule_work(&adapter->link_chg_task); 249 } 250 251 static void atl1e_del_timer(struct atl1e_adapter *adapter) 252 { 253 del_timer_sync(&adapter->phy_config_timer); 254 } 255 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter) 257 { 258 cancel_work_sync(&adapter->reset_task); 259 cancel_work_sync(&adapter->link_chg_task); 260 } 261 262 /* 263 * atl1e_tx_timeout - Respond to a Tx Hang 264 * @netdev: network interface device structure 265 */ 266 static void atl1e_tx_timeout(struct net_device *netdev) 267 { 268 struct atl1e_adapter *adapter = netdev_priv(netdev); 269 270 /* Do the reset outside of interrupt context */ 271 schedule_work(&adapter->reset_task); 272 } 273 274 /* 275 * atl1e_set_multi - Multicast and Promiscuous mode set 276 * @netdev: network interface device structure 277 * 278 * The set_multi entry point is called whenever the multicast address 279 * list or the network interface flags are updated. This routine is 280 * responsible for configuring the hardware for proper multicast, 281 * promiscuous mode, and all-multi behavior. 282 */ 283 static void atl1e_set_multi(struct net_device *netdev) 284 { 285 struct atl1e_adapter *adapter = netdev_priv(netdev); 286 struct atl1e_hw *hw = &adapter->hw; 287 struct netdev_hw_addr *ha; 288 u32 mac_ctrl_data = 0; 289 u32 hash_value; 290 291 /* Check for Promiscuous and All Multicast modes */ 292 mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL); 293 294 if (netdev->flags & IFF_PROMISC) { 295 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 296 } else if (netdev->flags & IFF_ALLMULTI) { 297 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 298 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 299 } else { 300 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 301 } 302 303 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 304 305 /* clear the old settings from the multicast hash table */ 306 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 307 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 308 309 /* comoute mc addresses' hash value ,and put it into hash table */ 310 netdev_for_each_mc_addr(ha, netdev) { 311 hash_value = atl1e_hash_mc_addr(hw, ha->addr); 312 atl1e_hash_set(hw, hash_value); 313 } 314 } 315 316 static void __atl1e_vlan_mode(u32 features, u32 *mac_ctrl_data) 317 { 318 if (features & NETIF_F_HW_VLAN_RX) { 319 /* enable VLAN tag insert/strip */ 320 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 321 } else { 322 /* disable VLAN tag insert/strip */ 323 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 324 } 325 } 326 327 static void atl1e_vlan_mode(struct net_device *netdev, u32 features) 328 { 329 struct atl1e_adapter *adapter = netdev_priv(netdev); 330 u32 mac_ctrl_data = 0; 331 332 netdev_dbg(adapter->netdev, "%s\n", __func__); 333 334 atl1e_irq_disable(adapter); 335 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL); 336 __atl1e_vlan_mode(features, &mac_ctrl_data); 337 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 338 atl1e_irq_enable(adapter); 339 } 340 341 static void atl1e_restore_vlan(struct atl1e_adapter *adapter) 342 { 343 netdev_dbg(adapter->netdev, "%s\n", __func__); 344 atl1e_vlan_mode(adapter->netdev, adapter->netdev->features); 345 } 346 347 /* 348 * atl1e_set_mac - Change the Ethernet Address of the NIC 349 * @netdev: network interface device structure 350 * @p: pointer to an address structure 351 * 352 * Returns 0 on success, negative on failure 353 */ 354 static int atl1e_set_mac_addr(struct net_device *netdev, void *p) 355 { 356 struct atl1e_adapter *adapter = netdev_priv(netdev); 357 struct sockaddr *addr = p; 358 359 if (!is_valid_ether_addr(addr->sa_data)) 360 return -EADDRNOTAVAIL; 361 362 if (netif_running(netdev)) 363 return -EBUSY; 364 365 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 366 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 367 368 atl1e_hw_set_mac_addr(&adapter->hw); 369 370 return 0; 371 } 372 373 static u32 atl1e_fix_features(struct net_device *netdev, u32 features) 374 { 375 /* 376 * Since there is no support for separate rx/tx vlan accel 377 * enable/disable make sure tx flag is always in same state as rx. 378 */ 379 if (features & NETIF_F_HW_VLAN_RX) 380 features |= NETIF_F_HW_VLAN_TX; 381 else 382 features &= ~NETIF_F_HW_VLAN_TX; 383 384 return features; 385 } 386 387 static int atl1e_set_features(struct net_device *netdev, u32 features) 388 { 389 u32 changed = netdev->features ^ features; 390 391 if (changed & NETIF_F_HW_VLAN_RX) 392 atl1e_vlan_mode(netdev, features); 393 394 return 0; 395 } 396 397 /* 398 * atl1e_change_mtu - Change the Maximum Transfer Unit 399 * @netdev: network interface device structure 400 * @new_mtu: new value for maximum frame size 401 * 402 * Returns 0 on success, negative on failure 403 */ 404 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu) 405 { 406 struct atl1e_adapter *adapter = netdev_priv(netdev); 407 int old_mtu = netdev->mtu; 408 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 409 410 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) || 411 (max_frame > MAX_JUMBO_FRAME_SIZE)) { 412 netdev_warn(adapter->netdev, "invalid MTU setting\n"); 413 return -EINVAL; 414 } 415 /* set MTU */ 416 if (old_mtu != new_mtu && netif_running(netdev)) { 417 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 418 msleep(1); 419 netdev->mtu = new_mtu; 420 adapter->hw.max_frame_size = new_mtu; 421 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3; 422 atl1e_down(adapter); 423 atl1e_up(adapter); 424 clear_bit(__AT_RESETTING, &adapter->flags); 425 } 426 return 0; 427 } 428 429 /* 430 * caller should hold mdio_lock 431 */ 432 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 433 { 434 struct atl1e_adapter *adapter = netdev_priv(netdev); 435 u16 result; 436 437 atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result); 438 return result; 439 } 440 441 static void atl1e_mdio_write(struct net_device *netdev, int phy_id, 442 int reg_num, int val) 443 { 444 struct atl1e_adapter *adapter = netdev_priv(netdev); 445 446 atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val); 447 } 448 449 /* 450 * atl1e_mii_ioctl - 451 * @netdev: 452 * @ifreq: 453 * @cmd: 454 */ 455 static int atl1e_mii_ioctl(struct net_device *netdev, 456 struct ifreq *ifr, int cmd) 457 { 458 struct atl1e_adapter *adapter = netdev_priv(netdev); 459 struct mii_ioctl_data *data = if_mii(ifr); 460 unsigned long flags; 461 int retval = 0; 462 463 if (!netif_running(netdev)) 464 return -EINVAL; 465 466 spin_lock_irqsave(&adapter->mdio_lock, flags); 467 switch (cmd) { 468 case SIOCGMIIPHY: 469 data->phy_id = 0; 470 break; 471 472 case SIOCGMIIREG: 473 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 474 &data->val_out)) { 475 retval = -EIO; 476 goto out; 477 } 478 break; 479 480 case SIOCSMIIREG: 481 if (data->reg_num & ~(0x1F)) { 482 retval = -EFAULT; 483 goto out; 484 } 485 486 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n", 487 data->reg_num, data->val_in); 488 if (atl1e_write_phy_reg(&adapter->hw, 489 data->reg_num, data->val_in)) { 490 retval = -EIO; 491 goto out; 492 } 493 break; 494 495 default: 496 retval = -EOPNOTSUPP; 497 break; 498 } 499 out: 500 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 501 return retval; 502 503 } 504 505 /* 506 * atl1e_ioctl - 507 * @netdev: 508 * @ifreq: 509 * @cmd: 510 */ 511 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 512 { 513 switch (cmd) { 514 case SIOCGMIIPHY: 515 case SIOCGMIIREG: 516 case SIOCSMIIREG: 517 return atl1e_mii_ioctl(netdev, ifr, cmd); 518 default: 519 return -EOPNOTSUPP; 520 } 521 } 522 523 static void atl1e_setup_pcicmd(struct pci_dev *pdev) 524 { 525 u16 cmd; 526 527 pci_read_config_word(pdev, PCI_COMMAND, &cmd); 528 cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO); 529 cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 530 pci_write_config_word(pdev, PCI_COMMAND, cmd); 531 532 /* 533 * some motherboards BIOS(PXE/EFI) driver may set PME 534 * while they transfer control to OS (Windows/Linux) 535 * so we should clear this bit before NIC work normally 536 */ 537 pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0); 538 msleep(1); 539 } 540 541 /* 542 * atl1e_alloc_queues - Allocate memory for all rings 543 * @adapter: board private structure to initialize 544 * 545 */ 546 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter) 547 { 548 return 0; 549 } 550 551 /* 552 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter) 553 * @adapter: board private structure to initialize 554 * 555 * atl1e_sw_init initializes the Adapter private data structure. 556 * Fields are initialized based on PCI device information and 557 * OS network device settings (MTU size). 558 */ 559 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter) 560 { 561 struct atl1e_hw *hw = &adapter->hw; 562 struct pci_dev *pdev = adapter->pdev; 563 u32 phy_status_data = 0; 564 565 adapter->wol = 0; 566 adapter->link_speed = SPEED_0; /* hardware init */ 567 adapter->link_duplex = FULL_DUPLEX; 568 adapter->num_rx_queues = 1; 569 570 /* PCI config space info */ 571 hw->vendor_id = pdev->vendor; 572 hw->device_id = pdev->device; 573 hw->subsystem_vendor_id = pdev->subsystem_vendor; 574 hw->subsystem_id = pdev->subsystem_device; 575 hw->revision_id = pdev->revision; 576 577 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); 578 579 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS); 580 /* nic type */ 581 if (hw->revision_id >= 0xF0) { 582 hw->nic_type = athr_l2e_revB; 583 } else { 584 if (phy_status_data & PHY_STATUS_100M) 585 hw->nic_type = athr_l1e; 586 else 587 hw->nic_type = athr_l2e_revA; 588 } 589 590 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS); 591 592 if (phy_status_data & PHY_STATUS_EMI_CA) 593 hw->emi_ca = true; 594 else 595 hw->emi_ca = false; 596 597 hw->phy_configured = false; 598 hw->preamble_len = 7; 599 hw->max_frame_size = adapter->netdev->mtu; 600 hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN + 601 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3; 602 603 hw->rrs_type = atl1e_rrs_disable; 604 hw->indirect_tab = 0; 605 hw->base_cpu = 0; 606 607 /* need confirm */ 608 609 hw->ict = 50000; /* 100ms */ 610 hw->smb_timer = 200000; /* 200ms */ 611 hw->tpd_burst = 5; 612 hw->rrd_thresh = 1; 613 hw->tpd_thresh = adapter->tx_ring.count / 2; 614 hw->rx_count_down = 4; /* 2us resolution */ 615 hw->tx_count_down = hw->imt * 4 / 3; 616 hw->dmar_block = atl1e_dma_req_1024; 617 hw->dmaw_block = atl1e_dma_req_1024; 618 hw->dmar_dly_cnt = 15; 619 hw->dmaw_dly_cnt = 4; 620 621 if (atl1e_alloc_queues(adapter)) { 622 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n"); 623 return -ENOMEM; 624 } 625 626 atomic_set(&adapter->irq_sem, 1); 627 spin_lock_init(&adapter->mdio_lock); 628 spin_lock_init(&adapter->tx_lock); 629 630 set_bit(__AT_DOWN, &adapter->flags); 631 632 return 0; 633 } 634 635 /* 636 * atl1e_clean_tx_ring - Free Tx-skb 637 * @adapter: board private structure 638 */ 639 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter) 640 { 641 struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *) 642 &adapter->tx_ring; 643 struct atl1e_tx_buffer *tx_buffer = NULL; 644 struct pci_dev *pdev = adapter->pdev; 645 u16 index, ring_count; 646 647 if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL) 648 return; 649 650 ring_count = tx_ring->count; 651 /* first unmmap dma */ 652 for (index = 0; index < ring_count; index++) { 653 tx_buffer = &tx_ring->tx_buffer[index]; 654 if (tx_buffer->dma) { 655 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE) 656 pci_unmap_single(pdev, tx_buffer->dma, 657 tx_buffer->length, PCI_DMA_TODEVICE); 658 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE) 659 pci_unmap_page(pdev, tx_buffer->dma, 660 tx_buffer->length, PCI_DMA_TODEVICE); 661 tx_buffer->dma = 0; 662 } 663 } 664 /* second free skb */ 665 for (index = 0; index < ring_count; index++) { 666 tx_buffer = &tx_ring->tx_buffer[index]; 667 if (tx_buffer->skb) { 668 dev_kfree_skb_any(tx_buffer->skb); 669 tx_buffer->skb = NULL; 670 } 671 } 672 /* Zero out Tx-buffers */ 673 memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) * 674 ring_count); 675 memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) * 676 ring_count); 677 } 678 679 /* 680 * atl1e_clean_rx_ring - Free rx-reservation skbs 681 * @adapter: board private structure 682 */ 683 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter) 684 { 685 struct atl1e_rx_ring *rx_ring = 686 (struct atl1e_rx_ring *)&adapter->rx_ring; 687 struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc; 688 u16 i, j; 689 690 691 if (adapter->ring_vir_addr == NULL) 692 return; 693 /* Zero out the descriptor ring */ 694 for (i = 0; i < adapter->num_rx_queues; i++) { 695 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { 696 if (rx_page_desc[i].rx_page[j].addr != NULL) { 697 memset(rx_page_desc[i].rx_page[j].addr, 0, 698 rx_ring->real_page_size); 699 } 700 } 701 } 702 } 703 704 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size) 705 { 706 *ring_size = ((u32)(adapter->tx_ring.count * 707 sizeof(struct atl1e_tpd_desc) + 7 708 /* tx ring, qword align */ 709 + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE * 710 adapter->num_rx_queues + 31 711 /* rx ring, 32 bytes align */ 712 + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) * 713 sizeof(u32) + 3)); 714 /* tx, rx cmd, dword align */ 715 } 716 717 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter) 718 { 719 struct atl1e_rx_ring *rx_ring = NULL; 720 721 rx_ring = &adapter->rx_ring; 722 723 rx_ring->real_page_size = adapter->rx_ring.page_size 724 + adapter->hw.max_frame_size 725 + ETH_HLEN + VLAN_HLEN 726 + ETH_FCS_LEN; 727 rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32); 728 atl1e_cal_ring_size(adapter, &adapter->ring_size); 729 730 adapter->ring_vir_addr = NULL; 731 adapter->rx_ring.desc = NULL; 732 rwlock_init(&adapter->tx_ring.tx_lock); 733 } 734 735 /* 736 * Read / Write Ptr Initialize: 737 */ 738 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter) 739 { 740 struct atl1e_tx_ring *tx_ring = NULL; 741 struct atl1e_rx_ring *rx_ring = NULL; 742 struct atl1e_rx_page_desc *rx_page_desc = NULL; 743 int i, j; 744 745 tx_ring = &adapter->tx_ring; 746 rx_ring = &adapter->rx_ring; 747 rx_page_desc = rx_ring->rx_page_desc; 748 749 tx_ring->next_to_use = 0; 750 atomic_set(&tx_ring->next_to_clean, 0); 751 752 for (i = 0; i < adapter->num_rx_queues; i++) { 753 rx_page_desc[i].rx_using = 0; 754 rx_page_desc[i].rx_nxseq = 0; 755 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { 756 *rx_page_desc[i].rx_page[j].write_offset_addr = 0; 757 rx_page_desc[i].rx_page[j].read_offset = 0; 758 } 759 } 760 } 761 762 /* 763 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources 764 * @adapter: board private structure 765 * 766 * Free all transmit software resources 767 */ 768 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter) 769 { 770 struct pci_dev *pdev = adapter->pdev; 771 772 atl1e_clean_tx_ring(adapter); 773 atl1e_clean_rx_ring(adapter); 774 775 if (adapter->ring_vir_addr) { 776 pci_free_consistent(pdev, adapter->ring_size, 777 adapter->ring_vir_addr, adapter->ring_dma); 778 adapter->ring_vir_addr = NULL; 779 } 780 781 if (adapter->tx_ring.tx_buffer) { 782 kfree(adapter->tx_ring.tx_buffer); 783 adapter->tx_ring.tx_buffer = NULL; 784 } 785 } 786 787 /* 788 * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources 789 * @adapter: board private structure 790 * 791 * Return 0 on success, negative on failure 792 */ 793 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter) 794 { 795 struct pci_dev *pdev = adapter->pdev; 796 struct atl1e_tx_ring *tx_ring; 797 struct atl1e_rx_ring *rx_ring; 798 struct atl1e_rx_page_desc *rx_page_desc; 799 int size, i, j; 800 u32 offset = 0; 801 int err = 0; 802 803 if (adapter->ring_vir_addr != NULL) 804 return 0; /* alloced already */ 805 806 tx_ring = &adapter->tx_ring; 807 rx_ring = &adapter->rx_ring; 808 809 /* real ring DMA buffer */ 810 811 size = adapter->ring_size; 812 adapter->ring_vir_addr = pci_alloc_consistent(pdev, 813 adapter->ring_size, &adapter->ring_dma); 814 815 if (adapter->ring_vir_addr == NULL) { 816 netdev_err(adapter->netdev, 817 "pci_alloc_consistent failed, size = D%d\n", size); 818 return -ENOMEM; 819 } 820 821 memset(adapter->ring_vir_addr, 0, adapter->ring_size); 822 823 rx_page_desc = rx_ring->rx_page_desc; 824 825 /* Init TPD Ring */ 826 tx_ring->dma = roundup(adapter->ring_dma, 8); 827 offset = tx_ring->dma - adapter->ring_dma; 828 tx_ring->desc = adapter->ring_vir_addr + offset; 829 size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count); 830 tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL); 831 if (tx_ring->tx_buffer == NULL) { 832 netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n", 833 size); 834 err = -ENOMEM; 835 goto failed; 836 } 837 838 /* Init RXF-Pages */ 839 offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count); 840 offset = roundup(offset, 32); 841 842 for (i = 0; i < adapter->num_rx_queues; i++) { 843 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { 844 rx_page_desc[i].rx_page[j].dma = 845 adapter->ring_dma + offset; 846 rx_page_desc[i].rx_page[j].addr = 847 adapter->ring_vir_addr + offset; 848 offset += rx_ring->real_page_size; 849 } 850 } 851 852 /* Init CMB dma address */ 853 tx_ring->cmb_dma = adapter->ring_dma + offset; 854 tx_ring->cmb = adapter->ring_vir_addr + offset; 855 offset += sizeof(u32); 856 857 for (i = 0; i < adapter->num_rx_queues; i++) { 858 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { 859 rx_page_desc[i].rx_page[j].write_offset_dma = 860 adapter->ring_dma + offset; 861 rx_page_desc[i].rx_page[j].write_offset_addr = 862 adapter->ring_vir_addr + offset; 863 offset += sizeof(u32); 864 } 865 } 866 867 if (unlikely(offset > adapter->ring_size)) { 868 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n", 869 offset, adapter->ring_size); 870 err = -1; 871 goto failed; 872 } 873 874 return 0; 875 failed: 876 if (adapter->ring_vir_addr != NULL) { 877 pci_free_consistent(pdev, adapter->ring_size, 878 adapter->ring_vir_addr, adapter->ring_dma); 879 adapter->ring_vir_addr = NULL; 880 } 881 return err; 882 } 883 884 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter) 885 { 886 887 struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw; 888 struct atl1e_rx_ring *rx_ring = 889 (struct atl1e_rx_ring *)&adapter->rx_ring; 890 struct atl1e_tx_ring *tx_ring = 891 (struct atl1e_tx_ring *)&adapter->tx_ring; 892 struct atl1e_rx_page_desc *rx_page_desc = NULL; 893 int i, j; 894 895 AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI, 896 (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32)); 897 AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO, 898 (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK)); 899 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count)); 900 AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO, 901 (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK)); 902 903 rx_page_desc = rx_ring->rx_page_desc; 904 /* RXF Page Physical address / Page Length */ 905 for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) { 906 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i], 907 (u32)((adapter->ring_dma & 908 AT_DMA_HI_ADDR_MASK) >> 32)); 909 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { 910 u32 page_phy_addr; 911 u32 offset_phy_addr; 912 913 page_phy_addr = rx_page_desc[i].rx_page[j].dma; 914 offset_phy_addr = 915 rx_page_desc[i].rx_page[j].write_offset_dma; 916 917 AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j], 918 page_phy_addr & AT_DMA_LO_ADDR_MASK); 919 AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j], 920 offset_phy_addr & AT_DMA_LO_ADDR_MASK); 921 AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1); 922 } 923 } 924 /* Page Length */ 925 AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size); 926 /* Load all of base address above */ 927 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 928 } 929 930 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter) 931 { 932 struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw; 933 u32 dev_ctrl_data = 0; 934 u32 max_pay_load = 0; 935 u32 jumbo_thresh = 0; 936 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */ 937 938 /* configure TXQ param */ 939 if (hw->nic_type != athr_l2e_revB) { 940 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN; 941 if (hw->max_frame_size <= 1500) { 942 jumbo_thresh = hw->max_frame_size + extra_size; 943 } else if (hw->max_frame_size < 6*1024) { 944 jumbo_thresh = 945 (hw->max_frame_size + extra_size) * 2 / 3; 946 } else { 947 jumbo_thresh = (hw->max_frame_size + extra_size) / 2; 948 } 949 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3); 950 } 951 952 dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL); 953 954 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) & 955 DEVICE_CTRL_MAX_PAYLOAD_MASK; 956 957 hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block); 958 959 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) & 960 DEVICE_CTRL_MAX_RREQ_SZ_MASK; 961 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 962 963 if (hw->nic_type != athr_l2e_revB) 964 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2, 965 atl1e_pay_load_size[hw->dmar_block]); 966 /* enable TXQ */ 967 AT_WRITE_REGW(hw, REG_TXQ_CTRL, 968 (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK) 969 << TXQ_CTRL_NUM_TPD_BURST_SHIFT) 970 | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN); 971 } 972 973 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter) 974 { 975 struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw; 976 u32 rxf_len = 0; 977 u32 rxf_low = 0; 978 u32 rxf_high = 0; 979 u32 rxf_thresh_data = 0; 980 u32 rxq_ctrl_data = 0; 981 982 if (hw->nic_type != athr_l2e_revB) { 983 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM, 984 (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) << 985 RXQ_JMBOSZ_TH_SHIFT | 986 (1 & RXQ_JMBO_LKAH_MASK) << 987 RXQ_JMBO_LKAH_SHIFT)); 988 989 rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN); 990 rxf_high = rxf_len * 4 / 5; 991 rxf_low = rxf_len / 5; 992 rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK) 993 << RXQ_RXF_PAUSE_TH_HI_SHIFT) | 994 ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK) 995 << RXQ_RXF_PAUSE_TH_LO_SHIFT); 996 997 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data); 998 } 999 1000 /* RRS */ 1001 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab); 1002 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu); 1003 1004 if (hw->rrs_type & atl1e_rrs_ipv4) 1005 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4; 1006 1007 if (hw->rrs_type & atl1e_rrs_ipv4_tcp) 1008 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP; 1009 1010 if (hw->rrs_type & atl1e_rrs_ipv6) 1011 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6; 1012 1013 if (hw->rrs_type & atl1e_rrs_ipv6_tcp) 1014 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP; 1015 1016 if (hw->rrs_type != atl1e_rrs_disable) 1017 rxq_ctrl_data |= 1018 (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT); 1019 1020 rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 | 1021 RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN; 1022 1023 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1024 } 1025 1026 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter) 1027 { 1028 struct atl1e_hw *hw = &adapter->hw; 1029 u32 dma_ctrl_data = 0; 1030 1031 dma_ctrl_data = DMA_CTRL_RXCMB_EN; 1032 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK) 1033 << DMA_CTRL_DMAR_BURST_LEN_SHIFT; 1034 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK) 1035 << DMA_CTRL_DMAW_BURST_LEN_SHIFT; 1036 dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER; 1037 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK) 1038 << DMA_CTRL_DMAR_DLY_CNT_SHIFT; 1039 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK) 1040 << DMA_CTRL_DMAW_DLY_CNT_SHIFT; 1041 1042 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1043 } 1044 1045 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter) 1046 { 1047 u32 value; 1048 struct atl1e_hw *hw = &adapter->hw; 1049 struct net_device *netdev = adapter->netdev; 1050 1051 /* Config MAC CTRL Register */ 1052 value = MAC_CTRL_TX_EN | 1053 MAC_CTRL_RX_EN ; 1054 1055 if (FULL_DUPLEX == adapter->link_duplex) 1056 value |= MAC_CTRL_DUPLX; 1057 1058 value |= ((u32)((SPEED_1000 == adapter->link_speed) ? 1059 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) << 1060 MAC_CTRL_SPEED_SHIFT); 1061 value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW); 1062 1063 value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD); 1064 value |= (((u32)adapter->hw.preamble_len & 1065 MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT); 1066 1067 __atl1e_vlan_mode(netdev->features, &value); 1068 1069 value |= MAC_CTRL_BC_EN; 1070 if (netdev->flags & IFF_PROMISC) 1071 value |= MAC_CTRL_PROMIS_EN; 1072 if (netdev->flags & IFF_ALLMULTI) 1073 value |= MAC_CTRL_MC_ALL_EN; 1074 1075 AT_WRITE_REG(hw, REG_MAC_CTRL, value); 1076 } 1077 1078 /* 1079 * atl1e_configure - Configure Transmit&Receive Unit after Reset 1080 * @adapter: board private structure 1081 * 1082 * Configure the Tx /Rx unit of the MAC after a reset. 1083 */ 1084 static int atl1e_configure(struct atl1e_adapter *adapter) 1085 { 1086 struct atl1e_hw *hw = &adapter->hw; 1087 1088 u32 intr_status_data = 0; 1089 1090 /* clear interrupt status */ 1091 AT_WRITE_REG(hw, REG_ISR, ~0); 1092 1093 /* 1. set MAC Address */ 1094 atl1e_hw_set_mac_addr(hw); 1095 1096 /* 2. Init the Multicast HASH table done by set_muti */ 1097 1098 /* 3. Clear any WOL status */ 1099 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1100 1101 /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr 1102 * TPD Ring/SMB/RXF0 Page CMBs, they use the same 1103 * High 32bits memory */ 1104 atl1e_configure_des_ring(adapter); 1105 1106 /* 5. set Interrupt Moderator Timer */ 1107 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt); 1108 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt); 1109 AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE | 1110 MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN); 1111 1112 /* 6. rx/tx threshold to trig interrupt */ 1113 AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh); 1114 AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh); 1115 AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down); 1116 AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down); 1117 1118 /* 7. set Interrupt Clear Timer */ 1119 AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict); 1120 1121 /* 8. set MTU */ 1122 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1123 VLAN_HLEN + ETH_FCS_LEN); 1124 1125 /* 9. config TXQ early tx threshold */ 1126 atl1e_configure_tx(adapter); 1127 1128 /* 10. config RXQ */ 1129 atl1e_configure_rx(adapter); 1130 1131 /* 11. config DMA Engine */ 1132 atl1e_configure_dma(adapter); 1133 1134 /* 12. smb timer to trig interrupt */ 1135 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer); 1136 1137 intr_status_data = AT_READ_REG(hw, REG_ISR); 1138 if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) { 1139 netdev_err(adapter->netdev, 1140 "atl1e_configure failed, PCIE phy link down\n"); 1141 return -1; 1142 } 1143 1144 AT_WRITE_REG(hw, REG_ISR, 0x7fffffff); 1145 return 0; 1146 } 1147 1148 /* 1149 * atl1e_get_stats - Get System Network Statistics 1150 * @netdev: network interface device structure 1151 * 1152 * Returns the address of the device statistics structure. 1153 * The statistics are actually updated from the timer callback. 1154 */ 1155 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev) 1156 { 1157 struct atl1e_adapter *adapter = netdev_priv(netdev); 1158 struct atl1e_hw_stats *hw_stats = &adapter->hw_stats; 1159 struct net_device_stats *net_stats = &netdev->stats; 1160 1161 net_stats->rx_packets = hw_stats->rx_ok; 1162 net_stats->tx_packets = hw_stats->tx_ok; 1163 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1164 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1165 net_stats->multicast = hw_stats->rx_mcast; 1166 net_stats->collisions = hw_stats->tx_1_col + 1167 hw_stats->tx_2_col * 2 + 1168 hw_stats->tx_late_col + hw_stats->tx_abort_col; 1169 1170 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err + 1171 hw_stats->rx_len_err + hw_stats->rx_sz_ov + 1172 hw_stats->rx_rrd_ov + hw_stats->rx_align_err; 1173 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1174 net_stats->rx_length_errors = hw_stats->rx_len_err; 1175 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1176 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1177 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; 1178 1179 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; 1180 1181 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col + 1182 hw_stats->tx_underrun + hw_stats->tx_trunc; 1183 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1184 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1185 net_stats->tx_window_errors = hw_stats->tx_late_col; 1186 1187 return net_stats; 1188 } 1189 1190 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter) 1191 { 1192 u16 hw_reg_addr = 0; 1193 unsigned long *stats_item = NULL; 1194 1195 /* update rx status */ 1196 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1197 stats_item = &adapter->hw_stats.rx_ok; 1198 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1199 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr); 1200 stats_item++; 1201 hw_reg_addr += 4; 1202 } 1203 /* update tx status */ 1204 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1205 stats_item = &adapter->hw_stats.tx_ok; 1206 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1207 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr); 1208 stats_item++; 1209 hw_reg_addr += 4; 1210 } 1211 } 1212 1213 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter) 1214 { 1215 u16 phy_data; 1216 1217 spin_lock(&adapter->mdio_lock); 1218 atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data); 1219 spin_unlock(&adapter->mdio_lock); 1220 } 1221 1222 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter) 1223 { 1224 struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *) 1225 &adapter->tx_ring; 1226 struct atl1e_tx_buffer *tx_buffer = NULL; 1227 u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX); 1228 u16 next_to_clean = atomic_read(&tx_ring->next_to_clean); 1229 1230 while (next_to_clean != hw_next_to_clean) { 1231 tx_buffer = &tx_ring->tx_buffer[next_to_clean]; 1232 if (tx_buffer->dma) { 1233 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE) 1234 pci_unmap_single(adapter->pdev, tx_buffer->dma, 1235 tx_buffer->length, PCI_DMA_TODEVICE); 1236 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE) 1237 pci_unmap_page(adapter->pdev, tx_buffer->dma, 1238 tx_buffer->length, PCI_DMA_TODEVICE); 1239 tx_buffer->dma = 0; 1240 } 1241 1242 if (tx_buffer->skb) { 1243 dev_kfree_skb_irq(tx_buffer->skb); 1244 tx_buffer->skb = NULL; 1245 } 1246 1247 if (++next_to_clean == tx_ring->count) 1248 next_to_clean = 0; 1249 } 1250 1251 atomic_set(&tx_ring->next_to_clean, next_to_clean); 1252 1253 if (netif_queue_stopped(adapter->netdev) && 1254 netif_carrier_ok(adapter->netdev)) { 1255 netif_wake_queue(adapter->netdev); 1256 } 1257 1258 return true; 1259 } 1260 1261 /* 1262 * atl1e_intr - Interrupt Handler 1263 * @irq: interrupt number 1264 * @data: pointer to a network interface device structure 1265 * @pt_regs: CPU registers structure 1266 */ 1267 static irqreturn_t atl1e_intr(int irq, void *data) 1268 { 1269 struct net_device *netdev = data; 1270 struct atl1e_adapter *adapter = netdev_priv(netdev); 1271 struct atl1e_hw *hw = &adapter->hw; 1272 int max_ints = AT_MAX_INT_WORK; 1273 int handled = IRQ_NONE; 1274 u32 status; 1275 1276 do { 1277 status = AT_READ_REG(hw, REG_ISR); 1278 if ((status & IMR_NORMAL_MASK) == 0 || 1279 (status & ISR_DIS_INT) != 0) { 1280 if (max_ints != AT_MAX_INT_WORK) 1281 handled = IRQ_HANDLED; 1282 break; 1283 } 1284 /* link event */ 1285 if (status & ISR_GPHY) 1286 atl1e_clear_phy_int(adapter); 1287 /* Ack ISR */ 1288 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1289 1290 handled = IRQ_HANDLED; 1291 /* check if PCIE PHY Link down */ 1292 if (status & ISR_PHY_LINKDOWN) { 1293 netdev_err(adapter->netdev, 1294 "pcie phy linkdown %x\n", status); 1295 if (netif_running(adapter->netdev)) { 1296 /* reset MAC */ 1297 atl1e_irq_reset(adapter); 1298 schedule_work(&adapter->reset_task); 1299 break; 1300 } 1301 } 1302 1303 /* check if DMA read/write error */ 1304 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) { 1305 netdev_err(adapter->netdev, 1306 "PCIE DMA RW error (status = 0x%x)\n", 1307 status); 1308 atl1e_irq_reset(adapter); 1309 schedule_work(&adapter->reset_task); 1310 break; 1311 } 1312 1313 if (status & ISR_SMB) 1314 atl1e_update_hw_stats(adapter); 1315 1316 /* link event */ 1317 if (status & (ISR_GPHY | ISR_MANUAL)) { 1318 netdev->stats.tx_carrier_errors++; 1319 atl1e_link_chg_event(adapter); 1320 break; 1321 } 1322 1323 /* transmit event */ 1324 if (status & ISR_TX_EVENT) 1325 atl1e_clean_tx_irq(adapter); 1326 1327 if (status & ISR_RX_EVENT) { 1328 /* 1329 * disable rx interrupts, without 1330 * the synchronize_irq bit 1331 */ 1332 AT_WRITE_REG(hw, REG_IMR, 1333 IMR_NORMAL_MASK & ~ISR_RX_EVENT); 1334 AT_WRITE_FLUSH(hw); 1335 if (likely(napi_schedule_prep( 1336 &adapter->napi))) 1337 __napi_schedule(&adapter->napi); 1338 } 1339 } while (--max_ints > 0); 1340 /* re-enable Interrupt*/ 1341 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1342 1343 return handled; 1344 } 1345 1346 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter, 1347 struct sk_buff *skb, struct atl1e_recv_ret_status *prrs) 1348 { 1349 u8 *packet = (u8 *)(prrs + 1); 1350 struct iphdr *iph; 1351 u16 head_len = ETH_HLEN; 1352 u16 pkt_flags; 1353 u16 err_flags; 1354 1355 skb_checksum_none_assert(skb); 1356 pkt_flags = prrs->pkt_flag; 1357 err_flags = prrs->err_flag; 1358 if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) && 1359 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) { 1360 if (pkt_flags & RRS_IS_IPV4) { 1361 if (pkt_flags & RRS_IS_802_3) 1362 head_len += 8; 1363 iph = (struct iphdr *) (packet + head_len); 1364 if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF)) 1365 goto hw_xsum; 1366 } 1367 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) { 1368 skb->ip_summed = CHECKSUM_UNNECESSARY; 1369 return; 1370 } 1371 } 1372 1373 hw_xsum : 1374 return; 1375 } 1376 1377 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter, 1378 u8 que) 1379 { 1380 struct atl1e_rx_page_desc *rx_page_desc = 1381 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc; 1382 u8 rx_using = rx_page_desc[que].rx_using; 1383 1384 return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]); 1385 } 1386 1387 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que, 1388 int *work_done, int work_to_do) 1389 { 1390 struct net_device *netdev = adapter->netdev; 1391 struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *) 1392 &adapter->rx_ring; 1393 struct atl1e_rx_page_desc *rx_page_desc = 1394 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc; 1395 struct sk_buff *skb = NULL; 1396 struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que); 1397 u32 packet_size, write_offset; 1398 struct atl1e_recv_ret_status *prrs; 1399 1400 write_offset = *(rx_page->write_offset_addr); 1401 if (likely(rx_page->read_offset < write_offset)) { 1402 do { 1403 if (*work_done >= work_to_do) 1404 break; 1405 (*work_done)++; 1406 /* get new packet's rrs */ 1407 prrs = (struct atl1e_recv_ret_status *) (rx_page->addr + 1408 rx_page->read_offset); 1409 /* check sequence number */ 1410 if (prrs->seq_num != rx_page_desc[que].rx_nxseq) { 1411 netdev_err(netdev, 1412 "rx sequence number error (rx=%d) (expect=%d)\n", 1413 prrs->seq_num, 1414 rx_page_desc[que].rx_nxseq); 1415 rx_page_desc[que].rx_nxseq++; 1416 /* just for debug use */ 1417 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0, 1418 (((u32)prrs->seq_num) << 16) | 1419 rx_page_desc[que].rx_nxseq); 1420 goto fatal_err; 1421 } 1422 rx_page_desc[que].rx_nxseq++; 1423 1424 /* error packet */ 1425 if (prrs->pkt_flag & RRS_IS_ERR_FRAME) { 1426 if (prrs->err_flag & (RRS_ERR_BAD_CRC | 1427 RRS_ERR_DRIBBLE | RRS_ERR_CODE | 1428 RRS_ERR_TRUNC)) { 1429 /* hardware error, discard this packet*/ 1430 netdev_err(netdev, 1431 "rx packet desc error %x\n", 1432 *((u32 *)prrs + 1)); 1433 goto skip_pkt; 1434 } 1435 } 1436 1437 packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) & 1438 RRS_PKT_SIZE_MASK) - 4; /* CRC */ 1439 skb = netdev_alloc_skb_ip_align(netdev, packet_size); 1440 if (skb == NULL) { 1441 netdev_warn(netdev, 1442 "Memory squeeze, deferring packet\n"); 1443 goto skip_pkt; 1444 } 1445 memcpy(skb->data, (u8 *)(prrs + 1), packet_size); 1446 skb_put(skb, packet_size); 1447 skb->protocol = eth_type_trans(skb, netdev); 1448 atl1e_rx_checksum(adapter, skb, prrs); 1449 1450 if (prrs->pkt_flag & RRS_IS_VLAN_TAG) { 1451 u16 vlan_tag = (prrs->vtag >> 4) | 1452 ((prrs->vtag & 7) << 13) | 1453 ((prrs->vtag & 8) << 9); 1454 netdev_dbg(netdev, 1455 "RXD VLAN TAG<RRD>=0x%04x\n", 1456 prrs->vtag); 1457 __vlan_hwaccel_put_tag(skb, vlan_tag); 1458 } 1459 netif_receive_skb(skb); 1460 1461 skip_pkt: 1462 /* skip current packet whether it's ok or not. */ 1463 rx_page->read_offset += 1464 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) & 1465 RRS_PKT_SIZE_MASK) + 1466 sizeof(struct atl1e_recv_ret_status) + 31) & 1467 0xFFFFFFE0); 1468 1469 if (rx_page->read_offset >= rx_ring->page_size) { 1470 /* mark this page clean */ 1471 u16 reg_addr; 1472 u8 rx_using; 1473 1474 rx_page->read_offset = 1475 *(rx_page->write_offset_addr) = 0; 1476 rx_using = rx_page_desc[que].rx_using; 1477 reg_addr = 1478 atl1e_rx_page_vld_regs[que][rx_using]; 1479 AT_WRITE_REGB(&adapter->hw, reg_addr, 1); 1480 rx_page_desc[que].rx_using ^= 1; 1481 rx_page = atl1e_get_rx_page(adapter, que); 1482 } 1483 write_offset = *(rx_page->write_offset_addr); 1484 } while (rx_page->read_offset < write_offset); 1485 } 1486 1487 return; 1488 1489 fatal_err: 1490 if (!test_bit(__AT_DOWN, &adapter->flags)) 1491 schedule_work(&adapter->reset_task); 1492 } 1493 1494 /* 1495 * atl1e_clean - NAPI Rx polling callback 1496 * @adapter: board private structure 1497 */ 1498 static int atl1e_clean(struct napi_struct *napi, int budget) 1499 { 1500 struct atl1e_adapter *adapter = 1501 container_of(napi, struct atl1e_adapter, napi); 1502 u32 imr_data; 1503 int work_done = 0; 1504 1505 /* Keep link state information with original netdev */ 1506 if (!netif_carrier_ok(adapter->netdev)) 1507 goto quit_polling; 1508 1509 atl1e_clean_rx_irq(adapter, 0, &work_done, budget); 1510 1511 /* If no Tx and not enough Rx work done, exit the polling mode */ 1512 if (work_done < budget) { 1513 quit_polling: 1514 napi_complete(napi); 1515 imr_data = AT_READ_REG(&adapter->hw, REG_IMR); 1516 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT); 1517 /* test debug */ 1518 if (test_bit(__AT_DOWN, &adapter->flags)) { 1519 atomic_dec(&adapter->irq_sem); 1520 netdev_err(adapter->netdev, 1521 "atl1e_clean is called when AT_DOWN\n"); 1522 } 1523 /* reenable RX intr */ 1524 /*atl1e_irq_enable(adapter); */ 1525 1526 } 1527 return work_done; 1528 } 1529 1530 #ifdef CONFIG_NET_POLL_CONTROLLER 1531 1532 /* 1533 * Polling 'interrupt' - used by things like netconsole to send skbs 1534 * without having to re-enable interrupts. It's not called while 1535 * the interrupt routine is executing. 1536 */ 1537 static void atl1e_netpoll(struct net_device *netdev) 1538 { 1539 struct atl1e_adapter *adapter = netdev_priv(netdev); 1540 1541 disable_irq(adapter->pdev->irq); 1542 atl1e_intr(adapter->pdev->irq, netdev); 1543 enable_irq(adapter->pdev->irq); 1544 } 1545 #endif 1546 1547 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter) 1548 { 1549 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; 1550 u16 next_to_use = 0; 1551 u16 next_to_clean = 0; 1552 1553 next_to_clean = atomic_read(&tx_ring->next_to_clean); 1554 next_to_use = tx_ring->next_to_use; 1555 1556 return (u16)(next_to_clean > next_to_use) ? 1557 (next_to_clean - next_to_use - 1) : 1558 (tx_ring->count + next_to_clean - next_to_use - 1); 1559 } 1560 1561 /* 1562 * get next usable tpd 1563 * Note: should call atl1e_tdp_avail to make sure 1564 * there is enough tpd to use 1565 */ 1566 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter) 1567 { 1568 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; 1569 u16 next_to_use = 0; 1570 1571 next_to_use = tx_ring->next_to_use; 1572 if (++tx_ring->next_to_use == tx_ring->count) 1573 tx_ring->next_to_use = 0; 1574 1575 memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc)); 1576 return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use]; 1577 } 1578 1579 static struct atl1e_tx_buffer * 1580 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd) 1581 { 1582 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; 1583 1584 return &tx_ring->tx_buffer[tpd - tx_ring->desc]; 1585 } 1586 1587 /* Calculate the transmit packet descript needed*/ 1588 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb) 1589 { 1590 int i = 0; 1591 u16 tpd_req = 1; 1592 u16 fg_size = 0; 1593 u16 proto_hdr_len = 0; 1594 1595 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1596 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]); 1597 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT); 1598 } 1599 1600 if (skb_is_gso(skb)) { 1601 if (skb->protocol == htons(ETH_P_IP) || 1602 (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) { 1603 proto_hdr_len = skb_transport_offset(skb) + 1604 tcp_hdrlen(skb); 1605 if (proto_hdr_len < skb_headlen(skb)) { 1606 tpd_req += ((skb_headlen(skb) - proto_hdr_len + 1607 MAX_TX_BUF_LEN - 1) >> 1608 MAX_TX_BUF_SHIFT); 1609 } 1610 } 1611 1612 } 1613 return tpd_req; 1614 } 1615 1616 static int atl1e_tso_csum(struct atl1e_adapter *adapter, 1617 struct sk_buff *skb, struct atl1e_tpd_desc *tpd) 1618 { 1619 u8 hdr_len; 1620 u32 real_len; 1621 unsigned short offload_type; 1622 int err; 1623 1624 if (skb_is_gso(skb)) { 1625 if (skb_header_cloned(skb)) { 1626 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 1627 if (unlikely(err)) 1628 return -1; 1629 } 1630 offload_type = skb_shinfo(skb)->gso_type; 1631 1632 if (offload_type & SKB_GSO_TCPV4) { 1633 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1634 + ntohs(ip_hdr(skb)->tot_len)); 1635 1636 if (real_len < skb->len) 1637 pskb_trim(skb, real_len); 1638 1639 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1640 if (unlikely(skb->len == hdr_len)) { 1641 /* only xsum need */ 1642 netdev_warn(adapter->netdev, 1643 "IPV4 tso with zero data??\n"); 1644 goto check_sum; 1645 } else { 1646 ip_hdr(skb)->check = 0; 1647 ip_hdr(skb)->tot_len = 0; 1648 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 1649 ip_hdr(skb)->saddr, 1650 ip_hdr(skb)->daddr, 1651 0, IPPROTO_TCP, 0); 1652 tpd->word3 |= (ip_hdr(skb)->ihl & 1653 TDP_V4_IPHL_MASK) << 1654 TPD_V4_IPHL_SHIFT; 1655 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) & 1656 TPD_TCPHDRLEN_MASK) << 1657 TPD_TCPHDRLEN_SHIFT; 1658 tpd->word3 |= ((skb_shinfo(skb)->gso_size) & 1659 TPD_MSS_MASK) << TPD_MSS_SHIFT; 1660 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT; 1661 } 1662 return 0; 1663 } 1664 } 1665 1666 check_sum: 1667 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 1668 u8 css, cso; 1669 1670 cso = skb_checksum_start_offset(skb); 1671 if (unlikely(cso & 0x1)) { 1672 netdev_err(adapter->netdev, 1673 "payload offset should not ant event number\n"); 1674 return -1; 1675 } else { 1676 css = cso + skb->csum_offset; 1677 tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) << 1678 TPD_PLOADOFFSET_SHIFT; 1679 tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) << 1680 TPD_CCSUMOFFSET_SHIFT; 1681 tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT; 1682 } 1683 } 1684 1685 return 0; 1686 } 1687 1688 static void atl1e_tx_map(struct atl1e_adapter *adapter, 1689 struct sk_buff *skb, struct atl1e_tpd_desc *tpd) 1690 { 1691 struct atl1e_tpd_desc *use_tpd = NULL; 1692 struct atl1e_tx_buffer *tx_buffer = NULL; 1693 u16 buf_len = skb_headlen(skb); 1694 u16 map_len = 0; 1695 u16 mapped_len = 0; 1696 u16 hdr_len = 0; 1697 u16 nr_frags; 1698 u16 f; 1699 int segment; 1700 1701 nr_frags = skb_shinfo(skb)->nr_frags; 1702 segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK; 1703 if (segment) { 1704 /* TSO */ 1705 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1706 use_tpd = tpd; 1707 1708 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd); 1709 tx_buffer->length = map_len; 1710 tx_buffer->dma = pci_map_single(adapter->pdev, 1711 skb->data, hdr_len, PCI_DMA_TODEVICE); 1712 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE); 1713 mapped_len += map_len; 1714 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma); 1715 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) | 1716 ((cpu_to_le32(tx_buffer->length) & 1717 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT); 1718 } 1719 1720 while (mapped_len < buf_len) { 1721 /* mapped_len == 0, means we should use the first tpd, 1722 which is given by caller */ 1723 if (mapped_len == 0) { 1724 use_tpd = tpd; 1725 } else { 1726 use_tpd = atl1e_get_tpd(adapter); 1727 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc)); 1728 } 1729 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd); 1730 tx_buffer->skb = NULL; 1731 1732 tx_buffer->length = map_len = 1733 ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ? 1734 MAX_TX_BUF_LEN : (buf_len - mapped_len); 1735 tx_buffer->dma = 1736 pci_map_single(adapter->pdev, skb->data + mapped_len, 1737 map_len, PCI_DMA_TODEVICE); 1738 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE); 1739 mapped_len += map_len; 1740 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma); 1741 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) | 1742 ((cpu_to_le32(tx_buffer->length) & 1743 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT); 1744 } 1745 1746 for (f = 0; f < nr_frags; f++) { 1747 const struct skb_frag_struct *frag; 1748 u16 i; 1749 u16 seg_num; 1750 1751 frag = &skb_shinfo(skb)->frags[f]; 1752 buf_len = skb_frag_size(frag); 1753 1754 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN; 1755 for (i = 0; i < seg_num; i++) { 1756 use_tpd = atl1e_get_tpd(adapter); 1757 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc)); 1758 1759 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd); 1760 BUG_ON(tx_buffer->skb); 1761 1762 tx_buffer->skb = NULL; 1763 tx_buffer->length = 1764 (buf_len > MAX_TX_BUF_LEN) ? 1765 MAX_TX_BUF_LEN : buf_len; 1766 buf_len -= tx_buffer->length; 1767 1768 tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev, 1769 frag, 1770 (i * MAX_TX_BUF_LEN), 1771 tx_buffer->length, 1772 DMA_TO_DEVICE); 1773 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE); 1774 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma); 1775 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) | 1776 ((cpu_to_le32(tx_buffer->length) & 1777 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT); 1778 } 1779 } 1780 1781 if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK) 1782 /* note this one is a tcp header */ 1783 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT; 1784 /* The last tpd */ 1785 1786 use_tpd->word3 |= 1 << TPD_EOP_SHIFT; 1787 /* The last buffer info contain the skb address, 1788 so it will be free after unmap */ 1789 tx_buffer->skb = skb; 1790 } 1791 1792 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count, 1793 struct atl1e_tpd_desc *tpd) 1794 { 1795 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; 1796 /* Force memory writes to complete before letting h/w 1797 * know there are new descriptors to fetch. (Only 1798 * applicable for weak-ordered memory model archs, 1799 * such as IA-64). */ 1800 wmb(); 1801 AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use); 1802 } 1803 1804 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb, 1805 struct net_device *netdev) 1806 { 1807 struct atl1e_adapter *adapter = netdev_priv(netdev); 1808 unsigned long flags; 1809 u16 tpd_req = 1; 1810 struct atl1e_tpd_desc *tpd; 1811 1812 if (test_bit(__AT_DOWN, &adapter->flags)) { 1813 dev_kfree_skb_any(skb); 1814 return NETDEV_TX_OK; 1815 } 1816 1817 if (unlikely(skb->len <= 0)) { 1818 dev_kfree_skb_any(skb); 1819 return NETDEV_TX_OK; 1820 } 1821 tpd_req = atl1e_cal_tdp_req(skb); 1822 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) 1823 return NETDEV_TX_LOCKED; 1824 1825 if (atl1e_tpd_avail(adapter) < tpd_req) { 1826 /* no enough descriptor, just stop queue */ 1827 netif_stop_queue(netdev); 1828 spin_unlock_irqrestore(&adapter->tx_lock, flags); 1829 return NETDEV_TX_BUSY; 1830 } 1831 1832 tpd = atl1e_get_tpd(adapter); 1833 1834 if (vlan_tx_tag_present(skb)) { 1835 u16 vlan_tag = vlan_tx_tag_get(skb); 1836 u16 atl1e_vlan_tag; 1837 1838 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT; 1839 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag); 1840 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) << 1841 TPD_VLAN_SHIFT; 1842 } 1843 1844 if (skb->protocol == htons(ETH_P_8021Q)) 1845 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT; 1846 1847 if (skb_network_offset(skb) != ETH_HLEN) 1848 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */ 1849 1850 /* do TSO and check sum */ 1851 if (atl1e_tso_csum(adapter, skb, tpd) != 0) { 1852 spin_unlock_irqrestore(&adapter->tx_lock, flags); 1853 dev_kfree_skb_any(skb); 1854 return NETDEV_TX_OK; 1855 } 1856 1857 atl1e_tx_map(adapter, skb, tpd); 1858 atl1e_tx_queue(adapter, tpd_req, tpd); 1859 1860 netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */ 1861 spin_unlock_irqrestore(&adapter->tx_lock, flags); 1862 return NETDEV_TX_OK; 1863 } 1864 1865 static void atl1e_free_irq(struct atl1e_adapter *adapter) 1866 { 1867 struct net_device *netdev = adapter->netdev; 1868 1869 free_irq(adapter->pdev->irq, netdev); 1870 1871 if (adapter->have_msi) 1872 pci_disable_msi(adapter->pdev); 1873 } 1874 1875 static int atl1e_request_irq(struct atl1e_adapter *adapter) 1876 { 1877 struct pci_dev *pdev = adapter->pdev; 1878 struct net_device *netdev = adapter->netdev; 1879 int flags = 0; 1880 int err = 0; 1881 1882 adapter->have_msi = true; 1883 err = pci_enable_msi(adapter->pdev); 1884 if (err) { 1885 netdev_dbg(adapter->netdev, 1886 "Unable to allocate MSI interrupt Error: %d\n", err); 1887 adapter->have_msi = false; 1888 } else 1889 netdev->irq = pdev->irq; 1890 1891 1892 if (!adapter->have_msi) 1893 flags |= IRQF_SHARED; 1894 err = request_irq(adapter->pdev->irq, atl1e_intr, flags, 1895 netdev->name, netdev); 1896 if (err) { 1897 netdev_dbg(adapter->netdev, 1898 "Unable to allocate interrupt Error: %d\n", err); 1899 if (adapter->have_msi) 1900 pci_disable_msi(adapter->pdev); 1901 return err; 1902 } 1903 netdev_dbg(adapter->netdev, "atl1e_request_irq OK\n"); 1904 return err; 1905 } 1906 1907 int atl1e_up(struct atl1e_adapter *adapter) 1908 { 1909 struct net_device *netdev = adapter->netdev; 1910 int err = 0; 1911 u32 val; 1912 1913 /* hardware has been reset, we need to reload some things */ 1914 err = atl1e_init_hw(&adapter->hw); 1915 if (err) { 1916 err = -EIO; 1917 return err; 1918 } 1919 atl1e_init_ring_ptrs(adapter); 1920 atl1e_set_multi(netdev); 1921 atl1e_restore_vlan(adapter); 1922 1923 if (atl1e_configure(adapter)) { 1924 err = -EIO; 1925 goto err_up; 1926 } 1927 1928 clear_bit(__AT_DOWN, &adapter->flags); 1929 napi_enable(&adapter->napi); 1930 atl1e_irq_enable(adapter); 1931 val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL); 1932 AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL, 1933 val | MASTER_CTRL_MANUAL_INT); 1934 1935 err_up: 1936 return err; 1937 } 1938 1939 void atl1e_down(struct atl1e_adapter *adapter) 1940 { 1941 struct net_device *netdev = adapter->netdev; 1942 1943 /* signal that we're down so the interrupt handler does not 1944 * reschedule our watchdog timer */ 1945 set_bit(__AT_DOWN, &adapter->flags); 1946 1947 netif_stop_queue(netdev); 1948 1949 /* reset MAC to disable all RX/TX */ 1950 atl1e_reset_hw(&adapter->hw); 1951 msleep(1); 1952 1953 napi_disable(&adapter->napi); 1954 atl1e_del_timer(adapter); 1955 atl1e_irq_disable(adapter); 1956 1957 netif_carrier_off(netdev); 1958 adapter->link_speed = SPEED_0; 1959 adapter->link_duplex = -1; 1960 atl1e_clean_tx_ring(adapter); 1961 atl1e_clean_rx_ring(adapter); 1962 } 1963 1964 /* 1965 * atl1e_open - Called when a network interface is made active 1966 * @netdev: network interface device structure 1967 * 1968 * Returns 0 on success, negative value on failure 1969 * 1970 * The open entry point is called when a network interface is made 1971 * active by the system (IFF_UP). At this point all resources needed 1972 * for transmit and receive operations are allocated, the interrupt 1973 * handler is registered with the OS, the watchdog timer is started, 1974 * and the stack is notified that the interface is ready. 1975 */ 1976 static int atl1e_open(struct net_device *netdev) 1977 { 1978 struct atl1e_adapter *adapter = netdev_priv(netdev); 1979 int err; 1980 1981 /* disallow open during test */ 1982 if (test_bit(__AT_TESTING, &adapter->flags)) 1983 return -EBUSY; 1984 1985 /* allocate rx/tx dma buffer & descriptors */ 1986 atl1e_init_ring_resources(adapter); 1987 err = atl1e_setup_ring_resources(adapter); 1988 if (unlikely(err)) 1989 return err; 1990 1991 err = atl1e_request_irq(adapter); 1992 if (unlikely(err)) 1993 goto err_req_irq; 1994 1995 err = atl1e_up(adapter); 1996 if (unlikely(err)) 1997 goto err_up; 1998 1999 return 0; 2000 2001 err_up: 2002 atl1e_free_irq(adapter); 2003 err_req_irq: 2004 atl1e_free_ring_resources(adapter); 2005 atl1e_reset_hw(&adapter->hw); 2006 2007 return err; 2008 } 2009 2010 /* 2011 * atl1e_close - Disables a network interface 2012 * @netdev: network interface device structure 2013 * 2014 * Returns 0, this is not allowed to fail 2015 * 2016 * The close entry point is called when an interface is de-activated 2017 * by the OS. The hardware is still under the drivers control, but 2018 * needs to be disabled. A global MAC reset is issued to stop the 2019 * hardware, and all transmit and receive resources are freed. 2020 */ 2021 static int atl1e_close(struct net_device *netdev) 2022 { 2023 struct atl1e_adapter *adapter = netdev_priv(netdev); 2024 2025 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2026 atl1e_down(adapter); 2027 atl1e_free_irq(adapter); 2028 atl1e_free_ring_resources(adapter); 2029 2030 return 0; 2031 } 2032 2033 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state) 2034 { 2035 struct net_device *netdev = pci_get_drvdata(pdev); 2036 struct atl1e_adapter *adapter = netdev_priv(netdev); 2037 struct atl1e_hw *hw = &adapter->hw; 2038 u32 ctrl = 0; 2039 u32 mac_ctrl_data = 0; 2040 u32 wol_ctrl_data = 0; 2041 u16 mii_advertise_data = 0; 2042 u16 mii_bmsr_data = 0; 2043 u16 mii_intr_status_data = 0; 2044 u32 wufc = adapter->wol; 2045 u32 i; 2046 #ifdef CONFIG_PM 2047 int retval = 0; 2048 #endif 2049 2050 if (netif_running(netdev)) { 2051 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2052 atl1e_down(adapter); 2053 } 2054 netif_device_detach(netdev); 2055 2056 #ifdef CONFIG_PM 2057 retval = pci_save_state(pdev); 2058 if (retval) 2059 return retval; 2060 #endif 2061 2062 if (wufc) { 2063 /* get link status */ 2064 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data); 2065 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data); 2066 2067 mii_advertise_data = ADVERTISE_10HALF; 2068 2069 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) || 2070 (atl1e_write_phy_reg(hw, 2071 MII_ADVERTISE, mii_advertise_data) != 0) || 2072 (atl1e_phy_commit(hw)) != 0) { 2073 netdev_dbg(adapter->netdev, "set phy register failed\n"); 2074 goto wol_dis; 2075 } 2076 2077 hw->phy_configured = false; /* re-init PHY when resume */ 2078 2079 /* turn on magic packet wol */ 2080 if (wufc & AT_WUFC_MAG) 2081 wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN; 2082 2083 if (wufc & AT_WUFC_LNKC) { 2084 /* if orignal link status is link, just wait for retrive link */ 2085 if (mii_bmsr_data & BMSR_LSTATUS) { 2086 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) { 2087 msleep(100); 2088 atl1e_read_phy_reg(hw, MII_BMSR, 2089 (u16 *)&mii_bmsr_data); 2090 if (mii_bmsr_data & BMSR_LSTATUS) 2091 break; 2092 } 2093 2094 if ((mii_bmsr_data & BMSR_LSTATUS) == 0) 2095 netdev_dbg(adapter->netdev, 2096 "Link may change when suspend\n"); 2097 } 2098 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN; 2099 /* only link up can wake up */ 2100 if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) { 2101 netdev_dbg(adapter->netdev, 2102 "read write phy register failed\n"); 2103 goto wol_dis; 2104 } 2105 } 2106 /* clear phy interrupt */ 2107 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data); 2108 /* Config MAC Ctrl register */ 2109 mac_ctrl_data = MAC_CTRL_RX_EN; 2110 /* set to 10/100M halt duplex */ 2111 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT; 2112 mac_ctrl_data |= (((u32)adapter->hw.preamble_len & 2113 MAC_CTRL_PRMLEN_MASK) << 2114 MAC_CTRL_PRMLEN_SHIFT); 2115 2116 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data); 2117 2118 /* magic packet maybe Broadcast&multicast&Unicast frame */ 2119 if (wufc & AT_WUFC_MAG) 2120 mac_ctrl_data |= MAC_CTRL_BC_EN; 2121 2122 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n", 2123 mac_ctrl_data); 2124 2125 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data); 2126 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 2127 /* pcie patch */ 2128 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC); 2129 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET; 2130 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl); 2131 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1); 2132 goto suspend_exit; 2133 } 2134 wol_dis: 2135 2136 /* WOL disabled */ 2137 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 2138 2139 /* pcie patch */ 2140 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC); 2141 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET; 2142 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl); 2143 2144 atl1e_force_ps(hw); 2145 hw->phy_configured = false; /* re-init PHY when resume */ 2146 2147 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); 2148 2149 suspend_exit: 2150 2151 if (netif_running(netdev)) 2152 atl1e_free_irq(adapter); 2153 2154 pci_disable_device(pdev); 2155 2156 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 2157 2158 return 0; 2159 } 2160 2161 #ifdef CONFIG_PM 2162 static int atl1e_resume(struct pci_dev *pdev) 2163 { 2164 struct net_device *netdev = pci_get_drvdata(pdev); 2165 struct atl1e_adapter *adapter = netdev_priv(netdev); 2166 u32 err; 2167 2168 pci_set_power_state(pdev, PCI_D0); 2169 pci_restore_state(pdev); 2170 2171 err = pci_enable_device(pdev); 2172 if (err) { 2173 netdev_err(adapter->netdev, 2174 "Cannot enable PCI device from suspend\n"); 2175 return err; 2176 } 2177 2178 pci_set_master(pdev); 2179 2180 AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */ 2181 2182 pci_enable_wake(pdev, PCI_D3hot, 0); 2183 pci_enable_wake(pdev, PCI_D3cold, 0); 2184 2185 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2186 2187 if (netif_running(netdev)) { 2188 err = atl1e_request_irq(adapter); 2189 if (err) 2190 return err; 2191 } 2192 2193 atl1e_reset_hw(&adapter->hw); 2194 2195 if (netif_running(netdev)) 2196 atl1e_up(adapter); 2197 2198 netif_device_attach(netdev); 2199 2200 return 0; 2201 } 2202 #endif 2203 2204 static void atl1e_shutdown(struct pci_dev *pdev) 2205 { 2206 atl1e_suspend(pdev, PMSG_SUSPEND); 2207 } 2208 2209 static const struct net_device_ops atl1e_netdev_ops = { 2210 .ndo_open = atl1e_open, 2211 .ndo_stop = atl1e_close, 2212 .ndo_start_xmit = atl1e_xmit_frame, 2213 .ndo_get_stats = atl1e_get_stats, 2214 .ndo_set_rx_mode = atl1e_set_multi, 2215 .ndo_validate_addr = eth_validate_addr, 2216 .ndo_set_mac_address = atl1e_set_mac_addr, 2217 .ndo_fix_features = atl1e_fix_features, 2218 .ndo_set_features = atl1e_set_features, 2219 .ndo_change_mtu = atl1e_change_mtu, 2220 .ndo_do_ioctl = atl1e_ioctl, 2221 .ndo_tx_timeout = atl1e_tx_timeout, 2222 #ifdef CONFIG_NET_POLL_CONTROLLER 2223 .ndo_poll_controller = atl1e_netpoll, 2224 #endif 2225 2226 }; 2227 2228 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2229 { 2230 SET_NETDEV_DEV(netdev, &pdev->dev); 2231 pci_set_drvdata(pdev, netdev); 2232 2233 netdev->irq = pdev->irq; 2234 netdev->netdev_ops = &atl1e_netdev_ops; 2235 2236 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2237 atl1e_set_ethtool_ops(netdev); 2238 2239 netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO | 2240 NETIF_F_HW_VLAN_RX; 2241 netdev->features = netdev->hw_features | NETIF_F_LLTX | 2242 NETIF_F_HW_VLAN_TX; 2243 2244 return 0; 2245 } 2246 2247 /* 2248 * atl1e_probe - Device Initialization Routine 2249 * @pdev: PCI device information struct 2250 * @ent: entry in atl1e_pci_tbl 2251 * 2252 * Returns 0 on success, negative on failure 2253 * 2254 * atl1e_probe initializes an adapter identified by a pci_dev structure. 2255 * The OS initialization, configuring of the adapter private structure, 2256 * and a hardware reset occur. 2257 */ 2258 static int __devinit atl1e_probe(struct pci_dev *pdev, 2259 const struct pci_device_id *ent) 2260 { 2261 struct net_device *netdev; 2262 struct atl1e_adapter *adapter = NULL; 2263 static int cards_found; 2264 2265 int err = 0; 2266 2267 err = pci_enable_device(pdev); 2268 if (err) { 2269 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2270 return err; 2271 } 2272 2273 /* 2274 * The atl1e chip can DMA to 64-bit addresses, but it uses a single 2275 * shared register for the high 32 bits, so only a single, aligned, 2276 * 4 GB physical address range can be used at a time. 2277 * 2278 * Supporting 64-bit DMA on this hardware is more trouble than it's 2279 * worth. It is far easier to limit to 32-bit DMA than update 2280 * various kernel subsystems to support the mechanics required by a 2281 * fixed-high-32-bit system. 2282 */ 2283 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || 2284 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) { 2285 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2286 goto err_dma; 2287 } 2288 2289 err = pci_request_regions(pdev, atl1e_driver_name); 2290 if (err) { 2291 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2292 goto err_pci_reg; 2293 } 2294 2295 pci_set_master(pdev); 2296 2297 netdev = alloc_etherdev(sizeof(struct atl1e_adapter)); 2298 if (netdev == NULL) { 2299 err = -ENOMEM; 2300 dev_err(&pdev->dev, "etherdev alloc failed\n"); 2301 goto err_alloc_etherdev; 2302 } 2303 2304 err = atl1e_init_netdev(netdev, pdev); 2305 if (err) { 2306 netdev_err(netdev, "init netdevice failed\n"); 2307 goto err_init_netdev; 2308 } 2309 adapter = netdev_priv(netdev); 2310 adapter->bd_number = cards_found; 2311 adapter->netdev = netdev; 2312 adapter->pdev = pdev; 2313 adapter->hw.adapter = adapter; 2314 adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0); 2315 if (!adapter->hw.hw_addr) { 2316 err = -EIO; 2317 netdev_err(netdev, "cannot map device registers\n"); 2318 goto err_ioremap; 2319 } 2320 netdev->base_addr = (unsigned long)adapter->hw.hw_addr; 2321 2322 /* init mii data */ 2323 adapter->mii.dev = netdev; 2324 adapter->mii.mdio_read = atl1e_mdio_read; 2325 adapter->mii.mdio_write = atl1e_mdio_write; 2326 adapter->mii.phy_id_mask = 0x1f; 2327 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK; 2328 2329 netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64); 2330 2331 init_timer(&adapter->phy_config_timer); 2332 adapter->phy_config_timer.function = atl1e_phy_config; 2333 adapter->phy_config_timer.data = (unsigned long) adapter; 2334 2335 /* get user settings */ 2336 atl1e_check_options(adapter); 2337 /* 2338 * Mark all PCI regions associated with PCI device 2339 * pdev as being reserved by owner atl1e_driver_name 2340 * Enables bus-mastering on the device and calls 2341 * pcibios_set_master to do the needed arch specific settings 2342 */ 2343 atl1e_setup_pcicmd(pdev); 2344 /* setup the private structure */ 2345 err = atl1e_sw_init(adapter); 2346 if (err) { 2347 netdev_err(netdev, "net device private data init failed\n"); 2348 goto err_sw_init; 2349 } 2350 2351 /* Init GPHY as early as possible due to power saving issue */ 2352 atl1e_phy_init(&adapter->hw); 2353 /* reset the controller to 2354 * put the device in a known good starting state */ 2355 err = atl1e_reset_hw(&adapter->hw); 2356 if (err) { 2357 err = -EIO; 2358 goto err_reset; 2359 } 2360 2361 if (atl1e_read_mac_addr(&adapter->hw) != 0) { 2362 err = -EIO; 2363 netdev_err(netdev, "get mac address failed\n"); 2364 goto err_eeprom; 2365 } 2366 2367 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2368 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len); 2369 netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr); 2370 2371 INIT_WORK(&adapter->reset_task, atl1e_reset_task); 2372 INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task); 2373 err = register_netdev(netdev); 2374 if (err) { 2375 netdev_err(netdev, "register netdevice failed\n"); 2376 goto err_register; 2377 } 2378 2379 /* assume we have no link for now */ 2380 netif_stop_queue(netdev); 2381 netif_carrier_off(netdev); 2382 2383 cards_found++; 2384 2385 return 0; 2386 2387 err_reset: 2388 err_register: 2389 err_sw_init: 2390 err_eeprom: 2391 iounmap(adapter->hw.hw_addr); 2392 err_init_netdev: 2393 err_ioremap: 2394 free_netdev(netdev); 2395 err_alloc_etherdev: 2396 pci_release_regions(pdev); 2397 err_pci_reg: 2398 err_dma: 2399 pci_disable_device(pdev); 2400 return err; 2401 } 2402 2403 /* 2404 * atl1e_remove - Device Removal Routine 2405 * @pdev: PCI device information struct 2406 * 2407 * atl1e_remove is called by the PCI subsystem to alert the driver 2408 * that it should release a PCI device. The could be caused by a 2409 * Hot-Plug event, or because the driver is going to be removed from 2410 * memory. 2411 */ 2412 static void __devexit atl1e_remove(struct pci_dev *pdev) 2413 { 2414 struct net_device *netdev = pci_get_drvdata(pdev); 2415 struct atl1e_adapter *adapter = netdev_priv(netdev); 2416 2417 /* 2418 * flush_scheduled work may reschedule our watchdog task, so 2419 * explicitly disable watchdog tasks from being rescheduled 2420 */ 2421 set_bit(__AT_DOWN, &adapter->flags); 2422 2423 atl1e_del_timer(adapter); 2424 atl1e_cancel_work(adapter); 2425 2426 unregister_netdev(netdev); 2427 atl1e_free_ring_resources(adapter); 2428 atl1e_force_ps(&adapter->hw); 2429 iounmap(adapter->hw.hw_addr); 2430 pci_release_regions(pdev); 2431 free_netdev(netdev); 2432 pci_disable_device(pdev); 2433 } 2434 2435 /* 2436 * atl1e_io_error_detected - called when PCI error is detected 2437 * @pdev: Pointer to PCI device 2438 * @state: The current pci connection state 2439 * 2440 * This function is called after a PCI bus error affecting 2441 * this device has been detected. 2442 */ 2443 static pci_ers_result_t 2444 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 2445 { 2446 struct net_device *netdev = pci_get_drvdata(pdev); 2447 struct atl1e_adapter *adapter = netdev_priv(netdev); 2448 2449 netif_device_detach(netdev); 2450 2451 if (state == pci_channel_io_perm_failure) 2452 return PCI_ERS_RESULT_DISCONNECT; 2453 2454 if (netif_running(netdev)) 2455 atl1e_down(adapter); 2456 2457 pci_disable_device(pdev); 2458 2459 /* Request a slot slot reset. */ 2460 return PCI_ERS_RESULT_NEED_RESET; 2461 } 2462 2463 /* 2464 * atl1e_io_slot_reset - called after the pci bus has been reset. 2465 * @pdev: Pointer to PCI device 2466 * 2467 * Restart the card from scratch, as if from a cold-boot. Implementation 2468 * resembles the first-half of the e1000_resume routine. 2469 */ 2470 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev) 2471 { 2472 struct net_device *netdev = pci_get_drvdata(pdev); 2473 struct atl1e_adapter *adapter = netdev_priv(netdev); 2474 2475 if (pci_enable_device(pdev)) { 2476 netdev_err(adapter->netdev, 2477 "Cannot re-enable PCI device after reset\n"); 2478 return PCI_ERS_RESULT_DISCONNECT; 2479 } 2480 pci_set_master(pdev); 2481 2482 pci_enable_wake(pdev, PCI_D3hot, 0); 2483 pci_enable_wake(pdev, PCI_D3cold, 0); 2484 2485 atl1e_reset_hw(&adapter->hw); 2486 2487 return PCI_ERS_RESULT_RECOVERED; 2488 } 2489 2490 /* 2491 * atl1e_io_resume - called when traffic can start flowing again. 2492 * @pdev: Pointer to PCI device 2493 * 2494 * This callback is called when the error recovery driver tells us that 2495 * its OK to resume normal operation. Implementation resembles the 2496 * second-half of the atl1e_resume routine. 2497 */ 2498 static void atl1e_io_resume(struct pci_dev *pdev) 2499 { 2500 struct net_device *netdev = pci_get_drvdata(pdev); 2501 struct atl1e_adapter *adapter = netdev_priv(netdev); 2502 2503 if (netif_running(netdev)) { 2504 if (atl1e_up(adapter)) { 2505 netdev_err(adapter->netdev, 2506 "can't bring device back up after reset\n"); 2507 return; 2508 } 2509 } 2510 2511 netif_device_attach(netdev); 2512 } 2513 2514 static struct pci_error_handlers atl1e_err_handler = { 2515 .error_detected = atl1e_io_error_detected, 2516 .slot_reset = atl1e_io_slot_reset, 2517 .resume = atl1e_io_resume, 2518 }; 2519 2520 static struct pci_driver atl1e_driver = { 2521 .name = atl1e_driver_name, 2522 .id_table = atl1e_pci_tbl, 2523 .probe = atl1e_probe, 2524 .remove = __devexit_p(atl1e_remove), 2525 /* Power Management Hooks */ 2526 #ifdef CONFIG_PM 2527 .suspend = atl1e_suspend, 2528 .resume = atl1e_resume, 2529 #endif 2530 .shutdown = atl1e_shutdown, 2531 .err_handler = &atl1e_err_handler 2532 }; 2533 2534 /* 2535 * atl1e_init_module - Driver Registration Routine 2536 * 2537 * atl1e_init_module is the first routine called when the driver is 2538 * loaded. All it does is register with the PCI subsystem. 2539 */ 2540 static int __init atl1e_init_module(void) 2541 { 2542 return pci_register_driver(&atl1e_driver); 2543 } 2544 2545 /* 2546 * atl1e_exit_module - Driver Exit Cleanup Routine 2547 * 2548 * atl1e_exit_module is called just before the driver is removed 2549 * from memory. 2550 */ 2551 static void __exit atl1e_exit_module(void) 2552 { 2553 pci_unregister_driver(&atl1e_driver); 2554 } 2555 2556 module_init(atl1e_init_module); 2557 module_exit(atl1e_exit_module); 2558