1 /* 2 * Copyright(c) 2008 - 2009 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 "atl1c.h" 23 24 #define ATL1C_DRV_VERSION "1.0.1.1-NAPI" 25 char atl1c_driver_name[] = "atl1c"; 26 char atl1c_driver_version[] = ATL1C_DRV_VERSION; 27 28 /* 29 * atl1c_pci_tbl - PCI Device ID Table 30 * 31 * Wildcard entries (PCI_ANY_ID) should come last 32 * Last entry must be all 0s 33 * 34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 35 * Class, Class Mask, private data (not used) } 36 */ 37 static const struct pci_device_id atl1c_pci_tbl[] = { 38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)}, 39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)}, 40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)}, 41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)}, 42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)}, 43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)}, 44 /* required last entry */ 45 { 0 } 46 }; 47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl); 48 49 MODULE_AUTHOR("Jie Yang"); 50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>"); 51 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver"); 52 MODULE_LICENSE("GPL"); 53 MODULE_VERSION(ATL1C_DRV_VERSION); 54 55 static int atl1c_stop_mac(struct atl1c_hw *hw); 56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw); 57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed); 58 static void atl1c_start_mac(struct atl1c_adapter *adapter); 59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 60 int *work_done, int work_to_do); 61 static int atl1c_up(struct atl1c_adapter *adapter); 62 static void atl1c_down(struct atl1c_adapter *adapter); 63 static int atl1c_reset_mac(struct atl1c_hw *hw); 64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); 65 static int atl1c_configure(struct atl1c_adapter *adapter); 66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter); 67 68 69 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | 70 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP; 71 static void atl1c_pcie_patch(struct atl1c_hw *hw) 72 { 73 u32 mst_data, data; 74 75 /* pclk sel could switch to 25M */ 76 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data); 77 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS; 78 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data); 79 80 /* WoL/PCIE related settings */ 81 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) { 82 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data); 83 data |= PCIE_PHYMISC_FORCE_RCV_DET; 84 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data); 85 } else { /* new dev set bit5 of MASTER */ 86 if (!(mst_data & MASTER_CTRL_WAKEN_25M)) 87 AT_WRITE_REG(hw, REG_MASTER_CTRL, 88 mst_data | MASTER_CTRL_WAKEN_25M); 89 } 90 /* aspm/PCIE setting only for l2cb 1.0 */ 91 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) { 92 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data); 93 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW, 94 L2CB1_PCIE_PHYMISC2_CDR_BW); 95 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH, 96 L2CB1_PCIE_PHYMISC2_L0S_TH); 97 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data); 98 /* extend L1 sync timer */ 99 AT_READ_REG(hw, REG_LINK_CTRL, &data); 100 data |= LINK_CTRL_EXT_SYNC; 101 AT_WRITE_REG(hw, REG_LINK_CTRL, data); 102 } 103 /* l2cb 1.x & l1d 1.x */ 104 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) { 105 AT_READ_REG(hw, REG_PM_CTRL, &data); 106 data |= PM_CTRL_L0S_BUFSRX_EN; 107 AT_WRITE_REG(hw, REG_PM_CTRL, data); 108 /* clear vendor msg */ 109 AT_READ_REG(hw, REG_DMA_DBG, &data); 110 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG); 111 } 112 } 113 114 /* FIXME: no need any more ? */ 115 /* 116 * atl1c_init_pcie - init PCIE module 117 */ 118 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) 119 { 120 u32 data; 121 u32 pci_cmd; 122 struct pci_dev *pdev = hw->adapter->pdev; 123 int pos; 124 125 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd); 126 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 127 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 128 PCI_COMMAND_IO); 129 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd); 130 131 /* 132 * Clear any PowerSaveing Settings 133 */ 134 pci_enable_wake(pdev, PCI_D3hot, 0); 135 pci_enable_wake(pdev, PCI_D3cold, 0); 136 /* wol sts read-clear */ 137 AT_READ_REG(hw, REG_WOL_CTRL, &data); 138 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 139 140 /* 141 * Mask some pcie error bits 142 */ 143 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 144 if (pos) { 145 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); 146 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); 147 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); 148 } 149 /* clear error status */ 150 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, 151 PCI_EXP_DEVSTA_NFED | 152 PCI_EXP_DEVSTA_FED | 153 PCI_EXP_DEVSTA_CED | 154 PCI_EXP_DEVSTA_URD); 155 156 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data); 157 data &= ~LTSSM_ID_EN_WRO; 158 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data); 159 160 atl1c_pcie_patch(hw); 161 if (flag & ATL1C_PCIE_L0S_L1_DISABLE) 162 atl1c_disable_l0s_l1(hw); 163 164 msleep(5); 165 } 166 167 /** 168 * atl1c_irq_enable - Enable default interrupt generation settings 169 * @adapter: board private structure 170 */ 171 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter) 172 { 173 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 174 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF); 175 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 176 AT_WRITE_FLUSH(&adapter->hw); 177 } 178 } 179 180 /** 181 * atl1c_irq_disable - Mask off interrupt generation on the NIC 182 * @adapter: board private structure 183 */ 184 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter) 185 { 186 atomic_inc(&adapter->irq_sem); 187 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 188 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT); 189 AT_WRITE_FLUSH(&adapter->hw); 190 synchronize_irq(adapter->pdev->irq); 191 } 192 193 /** 194 * atl1c_irq_reset - reset interrupt confiure on the NIC 195 * @adapter: board private structure 196 */ 197 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter) 198 { 199 atomic_set(&adapter->irq_sem, 1); 200 atl1c_irq_enable(adapter); 201 } 202 203 /* 204 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 205 * of the idle status register until the device is actually idle 206 */ 207 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 208 { 209 int timeout; 210 u32 data; 211 212 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 213 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 214 if ((data & modu_ctrl) == 0) 215 return 0; 216 msleep(1); 217 } 218 return data; 219 } 220 221 /** 222 * atl1c_phy_config - Timer Call-back 223 * @data: pointer to netdev cast into an unsigned long 224 */ 225 static void atl1c_phy_config(unsigned long data) 226 { 227 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data; 228 struct atl1c_hw *hw = &adapter->hw; 229 unsigned long flags; 230 231 spin_lock_irqsave(&adapter->mdio_lock, flags); 232 atl1c_restart_autoneg(hw); 233 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 234 } 235 236 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 237 { 238 WARN_ON(in_interrupt()); 239 atl1c_down(adapter); 240 atl1c_up(adapter); 241 clear_bit(__AT_RESETTING, &adapter->flags); 242 } 243 244 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 245 { 246 struct atl1c_hw *hw = &adapter->hw; 247 struct net_device *netdev = adapter->netdev; 248 struct pci_dev *pdev = adapter->pdev; 249 int err; 250 unsigned long flags; 251 u16 speed, duplex, phy_data; 252 253 spin_lock_irqsave(&adapter->mdio_lock, flags); 254 /* MII_BMSR must read twise */ 255 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 256 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 257 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 258 259 if ((phy_data & BMSR_LSTATUS) == 0) { 260 /* link down */ 261 netif_carrier_off(netdev); 262 hw->hibernate = true; 263 if (atl1c_reset_mac(hw) != 0) 264 if (netif_msg_hw(adapter)) 265 dev_warn(&pdev->dev, "reset mac failed\n"); 266 atl1c_set_aspm(hw, SPEED_0); 267 atl1c_post_phy_linkchg(hw, SPEED_0); 268 atl1c_reset_dma_ring(adapter); 269 atl1c_configure(adapter); 270 } else { 271 /* Link Up */ 272 hw->hibernate = false; 273 spin_lock_irqsave(&adapter->mdio_lock, flags); 274 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 275 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 276 if (unlikely(err)) 277 return; 278 /* link result is our setting */ 279 if (adapter->link_speed != speed || 280 adapter->link_duplex != duplex) { 281 adapter->link_speed = speed; 282 adapter->link_duplex = duplex; 283 atl1c_set_aspm(hw, speed); 284 atl1c_post_phy_linkchg(hw, speed); 285 atl1c_start_mac(adapter); 286 if (netif_msg_link(adapter)) 287 dev_info(&pdev->dev, 288 "%s: %s NIC Link is Up<%d Mbps %s>\n", 289 atl1c_driver_name, netdev->name, 290 adapter->link_speed, 291 adapter->link_duplex == FULL_DUPLEX ? 292 "Full Duplex" : "Half Duplex"); 293 } 294 if (!netif_carrier_ok(netdev)) 295 netif_carrier_on(netdev); 296 } 297 } 298 299 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 300 { 301 struct net_device *netdev = adapter->netdev; 302 struct pci_dev *pdev = adapter->pdev; 303 u16 phy_data; 304 u16 link_up; 305 306 spin_lock(&adapter->mdio_lock); 307 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 308 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 309 spin_unlock(&adapter->mdio_lock); 310 link_up = phy_data & BMSR_LSTATUS; 311 /* notify upper layer link down ASAP */ 312 if (!link_up) { 313 if (netif_carrier_ok(netdev)) { 314 /* old link state: Up */ 315 netif_carrier_off(netdev); 316 if (netif_msg_link(adapter)) 317 dev_info(&pdev->dev, 318 "%s: %s NIC Link is Down\n", 319 atl1c_driver_name, netdev->name); 320 adapter->link_speed = SPEED_0; 321 } 322 } 323 324 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 325 schedule_work(&adapter->common_task); 326 } 327 328 static void atl1c_common_task(struct work_struct *work) 329 { 330 struct atl1c_adapter *adapter; 331 struct net_device *netdev; 332 333 adapter = container_of(work, struct atl1c_adapter, common_task); 334 netdev = adapter->netdev; 335 336 if (test_bit(__AT_DOWN, &adapter->flags)) 337 return; 338 339 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 340 netif_device_detach(netdev); 341 atl1c_down(adapter); 342 atl1c_up(adapter); 343 netif_device_attach(netdev); 344 } 345 346 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 347 &adapter->work_event)) { 348 atl1c_irq_disable(adapter); 349 atl1c_check_link_status(adapter); 350 atl1c_irq_enable(adapter); 351 } 352 } 353 354 355 static void atl1c_del_timer(struct atl1c_adapter *adapter) 356 { 357 del_timer_sync(&adapter->phy_config_timer); 358 } 359 360 361 /** 362 * atl1c_tx_timeout - Respond to a Tx Hang 363 * @netdev: network interface device structure 364 */ 365 static void atl1c_tx_timeout(struct net_device *netdev) 366 { 367 struct atl1c_adapter *adapter = netdev_priv(netdev); 368 369 /* Do the reset outside of interrupt context */ 370 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 371 schedule_work(&adapter->common_task); 372 } 373 374 /** 375 * atl1c_set_multi - Multicast and Promiscuous mode set 376 * @netdev: network interface device structure 377 * 378 * The set_multi entry point is called whenever the multicast address 379 * list or the network interface flags are updated. This routine is 380 * responsible for configuring the hardware for proper multicast, 381 * promiscuous mode, and all-multi behavior. 382 */ 383 static void atl1c_set_multi(struct net_device *netdev) 384 { 385 struct atl1c_adapter *adapter = netdev_priv(netdev); 386 struct atl1c_hw *hw = &adapter->hw; 387 struct netdev_hw_addr *ha; 388 u32 mac_ctrl_data; 389 u32 hash_value; 390 391 /* Check for Promiscuous and All Multicast modes */ 392 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 393 394 if (netdev->flags & IFF_PROMISC) { 395 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 396 } else if (netdev->flags & IFF_ALLMULTI) { 397 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 398 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 399 } else { 400 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 401 } 402 403 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 404 405 /* clear the old settings from the multicast hash table */ 406 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 407 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 408 409 /* comoute mc addresses' hash value ,and put it into hash table */ 410 netdev_for_each_mc_addr(ha, netdev) { 411 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 412 atl1c_hash_set(hw, hash_value); 413 } 414 } 415 416 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 417 { 418 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 419 /* enable VLAN tag insert/strip */ 420 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 421 } else { 422 /* disable VLAN tag insert/strip */ 423 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 424 } 425 } 426 427 static void atl1c_vlan_mode(struct net_device *netdev, 428 netdev_features_t features) 429 { 430 struct atl1c_adapter *adapter = netdev_priv(netdev); 431 struct pci_dev *pdev = adapter->pdev; 432 u32 mac_ctrl_data = 0; 433 434 if (netif_msg_pktdata(adapter)) 435 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 436 437 atl1c_irq_disable(adapter); 438 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 439 __atl1c_vlan_mode(features, &mac_ctrl_data); 440 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 441 atl1c_irq_enable(adapter); 442 } 443 444 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 445 { 446 struct pci_dev *pdev = adapter->pdev; 447 448 if (netif_msg_pktdata(adapter)) 449 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 450 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 451 } 452 453 /** 454 * atl1c_set_mac - Change the Ethernet Address of the NIC 455 * @netdev: network interface device structure 456 * @p: pointer to an address structure 457 * 458 * Returns 0 on success, negative on failure 459 */ 460 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 461 { 462 struct atl1c_adapter *adapter = netdev_priv(netdev); 463 struct sockaddr *addr = p; 464 465 if (!is_valid_ether_addr(addr->sa_data)) 466 return -EADDRNOTAVAIL; 467 468 if (netif_running(netdev)) 469 return -EBUSY; 470 471 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 472 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 473 474 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 475 476 return 0; 477 } 478 479 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 480 struct net_device *dev) 481 { 482 unsigned int head_size; 483 int mtu = dev->mtu; 484 485 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 486 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 487 488 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) + 489 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 490 adapter->rx_frag_size = roundup_pow_of_two(head_size); 491 } 492 493 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 494 netdev_features_t features) 495 { 496 /* 497 * Since there is no support for separate rx/tx vlan accel 498 * enable/disable make sure tx flag is always in same state as rx. 499 */ 500 if (features & NETIF_F_HW_VLAN_CTAG_RX) 501 features |= NETIF_F_HW_VLAN_CTAG_TX; 502 else 503 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 504 505 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 506 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 507 508 return features; 509 } 510 511 static int atl1c_set_features(struct net_device *netdev, 512 netdev_features_t features) 513 { 514 netdev_features_t changed = netdev->features ^ features; 515 516 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 517 atl1c_vlan_mode(netdev, features); 518 519 return 0; 520 } 521 522 /** 523 * atl1c_change_mtu - Change the Maximum Transfer Unit 524 * @netdev: network interface device structure 525 * @new_mtu: new value for maximum frame size 526 * 527 * Returns 0 on success, negative on failure 528 */ 529 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 530 { 531 struct atl1c_adapter *adapter = netdev_priv(netdev); 532 struct atl1c_hw *hw = &adapter->hw; 533 int old_mtu = netdev->mtu; 534 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 535 536 /* Fast Ethernet controller doesn't support jumbo packet */ 537 if (((hw->nic_type == athr_l2c || 538 hw->nic_type == athr_l2c_b || 539 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) || 540 max_frame < ETH_ZLEN + ETH_FCS_LEN || 541 max_frame > MAX_JUMBO_FRAME_SIZE) { 542 if (netif_msg_link(adapter)) 543 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n"); 544 return -EINVAL; 545 } 546 /* set MTU */ 547 if (old_mtu != new_mtu && netif_running(netdev)) { 548 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 549 msleep(1); 550 netdev->mtu = new_mtu; 551 adapter->hw.max_frame_size = new_mtu; 552 atl1c_set_rxbufsize(adapter, netdev); 553 atl1c_down(adapter); 554 netdev_update_features(netdev); 555 atl1c_up(adapter); 556 clear_bit(__AT_RESETTING, &adapter->flags); 557 } 558 return 0; 559 } 560 561 /* 562 * caller should hold mdio_lock 563 */ 564 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 565 { 566 struct atl1c_adapter *adapter = netdev_priv(netdev); 567 u16 result; 568 569 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 570 return result; 571 } 572 573 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 574 int reg_num, int val) 575 { 576 struct atl1c_adapter *adapter = netdev_priv(netdev); 577 578 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 579 } 580 581 static int atl1c_mii_ioctl(struct net_device *netdev, 582 struct ifreq *ifr, int cmd) 583 { 584 struct atl1c_adapter *adapter = netdev_priv(netdev); 585 struct pci_dev *pdev = adapter->pdev; 586 struct mii_ioctl_data *data = if_mii(ifr); 587 unsigned long flags; 588 int retval = 0; 589 590 if (!netif_running(netdev)) 591 return -EINVAL; 592 593 spin_lock_irqsave(&adapter->mdio_lock, flags); 594 switch (cmd) { 595 case SIOCGMIIPHY: 596 data->phy_id = 0; 597 break; 598 599 case SIOCGMIIREG: 600 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 601 &data->val_out)) { 602 retval = -EIO; 603 goto out; 604 } 605 break; 606 607 case SIOCSMIIREG: 608 if (data->reg_num & ~(0x1F)) { 609 retval = -EFAULT; 610 goto out; 611 } 612 613 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 614 data->reg_num, data->val_in); 615 if (atl1c_write_phy_reg(&adapter->hw, 616 data->reg_num, data->val_in)) { 617 retval = -EIO; 618 goto out; 619 } 620 break; 621 622 default: 623 retval = -EOPNOTSUPP; 624 break; 625 } 626 out: 627 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 628 return retval; 629 } 630 631 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 632 { 633 switch (cmd) { 634 case SIOCGMIIPHY: 635 case SIOCGMIIREG: 636 case SIOCSMIIREG: 637 return atl1c_mii_ioctl(netdev, ifr, cmd); 638 default: 639 return -EOPNOTSUPP; 640 } 641 } 642 643 /** 644 * atl1c_alloc_queues - Allocate memory for all rings 645 * @adapter: board private structure to initialize 646 * 647 */ 648 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 649 { 650 return 0; 651 } 652 653 static void atl1c_set_mac_type(struct atl1c_hw *hw) 654 { 655 switch (hw->device_id) { 656 case PCI_DEVICE_ID_ATTANSIC_L2C: 657 hw->nic_type = athr_l2c; 658 break; 659 case PCI_DEVICE_ID_ATTANSIC_L1C: 660 hw->nic_type = athr_l1c; 661 break; 662 case PCI_DEVICE_ID_ATHEROS_L2C_B: 663 hw->nic_type = athr_l2c_b; 664 break; 665 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 666 hw->nic_type = athr_l2c_b2; 667 break; 668 case PCI_DEVICE_ID_ATHEROS_L1D: 669 hw->nic_type = athr_l1d; 670 break; 671 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 672 hw->nic_type = athr_l1d_2; 673 break; 674 default: 675 break; 676 } 677 } 678 679 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 680 { 681 u32 link_ctrl_data; 682 683 atl1c_set_mac_type(hw); 684 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 685 686 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 687 ATL1C_TXQ_MODE_ENHANCE; 688 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 689 ATL1C_ASPM_L1_SUPPORT; 690 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 691 692 if (hw->nic_type == athr_l1c || 693 hw->nic_type == athr_l1d || 694 hw->nic_type == athr_l1d_2) 695 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 696 return 0; 697 } 698 699 struct atl1c_platform_patch { 700 u16 pci_did; 701 u8 pci_revid; 702 u16 subsystem_vid; 703 u16 subsystem_did; 704 u32 patch_flag; 705 #define ATL1C_LINK_PATCH 0x1 706 }; 707 static const struct atl1c_platform_patch plats[] = { 708 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 709 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 710 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 711 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 712 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 713 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 714 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 715 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 716 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 717 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 718 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 719 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 720 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 721 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 722 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 723 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 724 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 725 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 726 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 727 {0}, 728 }; 729 730 static void atl1c_patch_assign(struct atl1c_hw *hw) 731 { 732 struct pci_dev *pdev = hw->adapter->pdev; 733 u32 misc_ctrl; 734 int i = 0; 735 736 hw->msi_lnkpatch = false; 737 738 while (plats[i].pci_did != 0) { 739 if (plats[i].pci_did == hw->device_id && 740 plats[i].pci_revid == hw->revision_id && 741 plats[i].subsystem_vid == hw->subsystem_vendor_id && 742 plats[i].subsystem_did == hw->subsystem_id) { 743 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 744 hw->msi_lnkpatch = true; 745 } 746 i++; 747 } 748 749 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 750 hw->revision_id == L2CB_V21) { 751 /* config access mode */ 752 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 753 REG_PCIE_DEV_MISC_CTRL); 754 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 755 misc_ctrl &= ~0x100; 756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 757 REG_PCIE_DEV_MISC_CTRL); 758 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 759 } 760 } 761 /** 762 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 763 * @adapter: board private structure to initialize 764 * 765 * atl1c_sw_init initializes the Adapter private data structure. 766 * Fields are initialized based on PCI device information and 767 * OS network device settings (MTU size). 768 */ 769 static int atl1c_sw_init(struct atl1c_adapter *adapter) 770 { 771 struct atl1c_hw *hw = &adapter->hw; 772 struct pci_dev *pdev = adapter->pdev; 773 u32 revision; 774 775 776 adapter->wol = 0; 777 device_set_wakeup_enable(&pdev->dev, false); 778 adapter->link_speed = SPEED_0; 779 adapter->link_duplex = FULL_DUPLEX; 780 adapter->tpd_ring[0].count = 1024; 781 adapter->rfd_ring.count = 512; 782 783 hw->vendor_id = pdev->vendor; 784 hw->device_id = pdev->device; 785 hw->subsystem_vendor_id = pdev->subsystem_vendor; 786 hw->subsystem_id = pdev->subsystem_device; 787 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 788 hw->revision_id = revision & 0xFF; 789 /* before link up, we assume hibernate is true */ 790 hw->hibernate = true; 791 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 792 if (atl1c_setup_mac_funcs(hw) != 0) { 793 dev_err(&pdev->dev, "set mac function pointers failed\n"); 794 return -1; 795 } 796 atl1c_patch_assign(hw); 797 798 hw->intr_mask = IMR_NORMAL_MASK; 799 hw->phy_configured = false; 800 hw->preamble_len = 7; 801 hw->max_frame_size = adapter->netdev->mtu; 802 hw->autoneg_advertised = ADVERTISED_Autoneg; 803 hw->indirect_tab = 0xE4E4E4E4; 804 hw->base_cpu = 0; 805 806 hw->ict = 50000; /* 100ms */ 807 hw->smb_timer = 200000; /* 400ms */ 808 hw->rx_imt = 200; 809 hw->tx_imt = 1000; 810 811 hw->tpd_burst = 5; 812 hw->rfd_burst = 8; 813 hw->dma_order = atl1c_dma_ord_out; 814 hw->dmar_block = atl1c_dma_req_1024; 815 816 if (atl1c_alloc_queues(adapter)) { 817 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 818 return -ENOMEM; 819 } 820 /* TODO */ 821 atl1c_set_rxbufsize(adapter, adapter->netdev); 822 atomic_set(&adapter->irq_sem, 1); 823 spin_lock_init(&adapter->mdio_lock); 824 spin_lock_init(&adapter->tx_lock); 825 set_bit(__AT_DOWN, &adapter->flags); 826 827 return 0; 828 } 829 830 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 831 struct atl1c_buffer *buffer_info) 832 { 833 u16 pci_driection; 834 if (buffer_info->flags & ATL1C_BUFFER_FREE) 835 return; 836 if (buffer_info->dma) { 837 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 838 pci_driection = PCI_DMA_FROMDEVICE; 839 else 840 pci_driection = PCI_DMA_TODEVICE; 841 842 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 843 pci_unmap_single(pdev, buffer_info->dma, 844 buffer_info->length, pci_driection); 845 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 846 pci_unmap_page(pdev, buffer_info->dma, 847 buffer_info->length, pci_driection); 848 } 849 if (buffer_info->skb) 850 dev_consume_skb_any(buffer_info->skb); 851 buffer_info->dma = 0; 852 buffer_info->skb = NULL; 853 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 854 } 855 /** 856 * atl1c_clean_tx_ring - Free Tx-skb 857 * @adapter: board private structure 858 */ 859 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 860 enum atl1c_trans_queue type) 861 { 862 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 863 struct atl1c_buffer *buffer_info; 864 struct pci_dev *pdev = adapter->pdev; 865 u16 index, ring_count; 866 867 ring_count = tpd_ring->count; 868 for (index = 0; index < ring_count; index++) { 869 buffer_info = &tpd_ring->buffer_info[index]; 870 atl1c_clean_buffer(pdev, buffer_info); 871 } 872 873 netdev_reset_queue(adapter->netdev); 874 875 /* Zero out Tx-buffers */ 876 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 877 ring_count); 878 atomic_set(&tpd_ring->next_to_clean, 0); 879 tpd_ring->next_to_use = 0; 880 } 881 882 /** 883 * atl1c_clean_rx_ring - Free rx-reservation skbs 884 * @adapter: board private structure 885 */ 886 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 887 { 888 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 889 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 890 struct atl1c_buffer *buffer_info; 891 struct pci_dev *pdev = adapter->pdev; 892 int j; 893 894 for (j = 0; j < rfd_ring->count; j++) { 895 buffer_info = &rfd_ring->buffer_info[j]; 896 atl1c_clean_buffer(pdev, buffer_info); 897 } 898 /* zero out the descriptor ring */ 899 memset(rfd_ring->desc, 0, rfd_ring->size); 900 rfd_ring->next_to_clean = 0; 901 rfd_ring->next_to_use = 0; 902 rrd_ring->next_to_use = 0; 903 rrd_ring->next_to_clean = 0; 904 } 905 906 /* 907 * Read / Write Ptr Initialize: 908 */ 909 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 910 { 911 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 912 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 913 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 914 struct atl1c_buffer *buffer_info; 915 int i, j; 916 917 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 918 tpd_ring[i].next_to_use = 0; 919 atomic_set(&tpd_ring[i].next_to_clean, 0); 920 buffer_info = tpd_ring[i].buffer_info; 921 for (j = 0; j < tpd_ring->count; j++) 922 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 923 ATL1C_BUFFER_FREE); 924 } 925 rfd_ring->next_to_use = 0; 926 rfd_ring->next_to_clean = 0; 927 rrd_ring->next_to_use = 0; 928 rrd_ring->next_to_clean = 0; 929 for (j = 0; j < rfd_ring->count; j++) { 930 buffer_info = &rfd_ring->buffer_info[j]; 931 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 932 } 933 } 934 935 /** 936 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 937 * @adapter: board private structure 938 * 939 * Free all transmit software resources 940 */ 941 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 942 { 943 struct pci_dev *pdev = adapter->pdev; 944 945 pci_free_consistent(pdev, adapter->ring_header.size, 946 adapter->ring_header.desc, 947 adapter->ring_header.dma); 948 adapter->ring_header.desc = NULL; 949 950 /* Note: just free tdp_ring.buffer_info, 951 * it contain rfd_ring.buffer_info, do not double free */ 952 if (adapter->tpd_ring[0].buffer_info) { 953 kfree(adapter->tpd_ring[0].buffer_info); 954 adapter->tpd_ring[0].buffer_info = NULL; 955 } 956 if (adapter->rx_page) { 957 put_page(adapter->rx_page); 958 adapter->rx_page = NULL; 959 } 960 } 961 962 /** 963 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources 964 * @adapter: board private structure 965 * 966 * Return 0 on success, negative on failure 967 */ 968 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 969 { 970 struct pci_dev *pdev = adapter->pdev; 971 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 972 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 973 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 974 struct atl1c_ring_header *ring_header = &adapter->ring_header; 975 int size; 976 int i; 977 int count = 0; 978 int rx_desc_count = 0; 979 u32 offset = 0; 980 981 rrd_ring->count = rfd_ring->count; 982 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 983 tpd_ring[i].count = tpd_ring[0].count; 984 985 /* 2 tpd queue, one high priority queue, 986 * another normal priority queue */ 987 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 988 rfd_ring->count); 989 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 990 if (unlikely(!tpd_ring->buffer_info)) 991 goto err_nomem; 992 993 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 994 tpd_ring[i].buffer_info = 995 (tpd_ring->buffer_info + count); 996 count += tpd_ring[i].count; 997 } 998 999 rfd_ring->buffer_info = 1000 (tpd_ring->buffer_info + count); 1001 count += rfd_ring->count; 1002 rx_desc_count += rfd_ring->count; 1003 1004 /* 1005 * real ring DMA buffer 1006 * each ring/block may need up to 8 bytes for alignment, hence the 1007 * additional bytes tacked onto the end. 1008 */ 1009 ring_header->size = size = 1010 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1011 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1012 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1013 8 * 4; 1014 1015 ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size, 1016 &ring_header->dma, GFP_KERNEL); 1017 if (unlikely(!ring_header->desc)) { 1018 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1019 goto err_nomem; 1020 } 1021 /* init TPD ring */ 1022 1023 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1024 offset = tpd_ring[0].dma - ring_header->dma; 1025 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1026 tpd_ring[i].dma = ring_header->dma + offset; 1027 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1028 tpd_ring[i].size = 1029 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1030 offset += roundup(tpd_ring[i].size, 8); 1031 } 1032 /* init RFD ring */ 1033 rfd_ring->dma = ring_header->dma + offset; 1034 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1035 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1036 offset += roundup(rfd_ring->size, 8); 1037 1038 /* init RRD ring */ 1039 rrd_ring->dma = ring_header->dma + offset; 1040 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1041 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1042 rrd_ring->count; 1043 offset += roundup(rrd_ring->size, 8); 1044 1045 return 0; 1046 1047 err_nomem: 1048 kfree(tpd_ring->buffer_info); 1049 return -ENOMEM; 1050 } 1051 1052 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1053 { 1054 struct atl1c_hw *hw = &adapter->hw; 1055 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1056 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1057 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1058 adapter->tpd_ring; 1059 1060 /* TPD */ 1061 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1062 (u32)((tpd_ring[atl1c_trans_normal].dma & 1063 AT_DMA_HI_ADDR_MASK) >> 32)); 1064 /* just enable normal priority TX queue */ 1065 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1066 (u32)(tpd_ring[atl1c_trans_normal].dma & 1067 AT_DMA_LO_ADDR_MASK)); 1068 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1069 (u32)(tpd_ring[atl1c_trans_high].dma & 1070 AT_DMA_LO_ADDR_MASK)); 1071 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1072 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1073 1074 1075 /* RFD */ 1076 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1077 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1078 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1079 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1080 1081 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1082 rfd_ring->count & RFD_RING_SIZE_MASK); 1083 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1084 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1085 1086 /* RRD */ 1087 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1088 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1089 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1090 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1091 1092 if (hw->nic_type == athr_l2c_b) { 1093 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1094 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1095 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1096 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1097 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1098 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1099 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1100 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1101 } 1102 /* Load all of base address above */ 1103 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1104 } 1105 1106 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1107 { 1108 struct atl1c_hw *hw = &adapter->hw; 1109 int max_pay_load; 1110 u16 tx_offload_thresh; 1111 u32 txq_ctrl_data; 1112 1113 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1114 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1115 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1116 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1117 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1118 /* 1119 * if BIOS had changed the dam-read-max-length to an invalid value, 1120 * restore it to default value 1121 */ 1122 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1123 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1124 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1125 } 1126 txq_ctrl_data = 1127 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1128 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1129 1130 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1131 } 1132 1133 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1134 { 1135 struct atl1c_hw *hw = &adapter->hw; 1136 u32 rxq_ctrl_data; 1137 1138 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1139 RXQ_RFD_BURST_NUM_SHIFT; 1140 1141 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1142 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1143 1144 /* aspm for gigabit */ 1145 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1146 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1147 ASPM_THRUPUT_LIMIT_100M); 1148 1149 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1150 } 1151 1152 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1153 { 1154 struct atl1c_hw *hw = &adapter->hw; 1155 u32 dma_ctrl_data; 1156 1157 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1158 DMA_CTRL_RREQ_PRI_DATA | 1159 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1160 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1161 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1162 1163 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1164 } 1165 1166 /* 1167 * Stop the mac, transmit and receive units 1168 * hw - Struct containing variables accessed by shared code 1169 * return : 0 or idle status (if error) 1170 */ 1171 static int atl1c_stop_mac(struct atl1c_hw *hw) 1172 { 1173 u32 data; 1174 1175 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1176 data &= ~RXQ_CTRL_EN; 1177 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1178 1179 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1180 data &= ~TXQ_CTRL_EN; 1181 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1182 1183 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1184 1185 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1186 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1187 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1188 1189 return (int)atl1c_wait_until_idle(hw, 1190 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1191 } 1192 1193 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1194 { 1195 struct atl1c_hw *hw = &adapter->hw; 1196 u32 mac, txq, rxq; 1197 1198 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false; 1199 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1200 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1201 1202 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1203 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1204 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1205 1206 txq |= TXQ_CTRL_EN; 1207 rxq |= RXQ_CTRL_EN; 1208 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1209 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1210 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1211 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1212 MAC_CTRL_HASH_ALG_CRC32; 1213 if (hw->mac_duplex) 1214 mac |= MAC_CTRL_DUPLX; 1215 else 1216 mac &= ~MAC_CTRL_DUPLX; 1217 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1218 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1219 1220 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1221 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1222 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1223 } 1224 1225 /* 1226 * Reset the transmit and receive units; mask and clear all interrupts. 1227 * hw - Struct containing variables accessed by shared code 1228 * return : 0 or idle status (if error) 1229 */ 1230 static int atl1c_reset_mac(struct atl1c_hw *hw) 1231 { 1232 struct atl1c_adapter *adapter = hw->adapter; 1233 struct pci_dev *pdev = adapter->pdev; 1234 u32 ctrl_data = 0; 1235 1236 atl1c_stop_mac(hw); 1237 /* 1238 * Issue Soft Reset to the MAC. This will reset the chip's 1239 * transmit, receive, DMA. It will not effect 1240 * the current PCI configuration. The global reset bit is self- 1241 * clearing, and should clear within a microsecond. 1242 */ 1243 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1244 ctrl_data |= MASTER_CTRL_OOB_DIS; 1245 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1246 1247 AT_WRITE_FLUSH(hw); 1248 msleep(10); 1249 /* Wait at least 10ms for All module to be Idle */ 1250 1251 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1252 dev_err(&pdev->dev, 1253 "MAC state machine can't be idle since" 1254 " disabled for 10ms second\n"); 1255 return -1; 1256 } 1257 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1258 1259 /* driver control speed/duplex */ 1260 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1261 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1262 1263 /* clk switch setting */ 1264 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1265 switch (hw->nic_type) { 1266 case athr_l2c_b: 1267 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1268 SERDES_MAC_CLK_SLOWDOWN); 1269 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1270 break; 1271 case athr_l2c_b2: 1272 case athr_l1d_2: 1273 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1274 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1275 break; 1276 default: 1277 break; 1278 } 1279 1280 return 0; 1281 } 1282 1283 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1284 { 1285 u16 ctrl_flags = hw->ctrl_flags; 1286 1287 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1288 atl1c_set_aspm(hw, SPEED_0); 1289 hw->ctrl_flags = ctrl_flags; 1290 } 1291 1292 /* 1293 * Set ASPM state. 1294 * Enable/disable L0s/L1 depend on link state. 1295 */ 1296 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1297 { 1298 u32 pm_ctrl_data; 1299 u32 link_l1_timer; 1300 1301 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1302 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1303 PM_CTRL_ASPM_L0S_EN | 1304 PM_CTRL_MAC_ASPM_CHK); 1305 /* L1 timer */ 1306 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1307 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1308 link_l1_timer = 1309 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1310 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1311 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1312 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1313 } else { 1314 link_l1_timer = hw->nic_type == athr_l2c_b ? 1315 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1316 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1317 link_l1_timer = 1; 1318 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1319 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1320 } 1321 1322 /* L0S/L1 enable */ 1323 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1324 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1325 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1326 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1327 1328 /* l2cb & l1d & l2cb2 & l1d2 */ 1329 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1330 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1331 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1332 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1333 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1334 PM_CTRL_SERDES_PD_EX_L1 | 1335 PM_CTRL_CLK_SWH_L1; 1336 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1337 PM_CTRL_SERDES_PLL_L1_EN | 1338 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1339 PM_CTRL_SA_DLY_EN | 1340 PM_CTRL_HOTRST); 1341 /* disable l0s if link down or l2cb */ 1342 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1343 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1344 } else { /* l1c */ 1345 pm_ctrl_data = 1346 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1347 if (link_speed != SPEED_0) { 1348 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1349 PM_CTRL_SERDES_PLL_L1_EN | 1350 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1351 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1352 PM_CTRL_CLK_SWH_L1 | 1353 PM_CTRL_ASPM_L0S_EN | 1354 PM_CTRL_ASPM_L1_EN); 1355 } else { /* link down */ 1356 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1357 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1358 PM_CTRL_SERDES_PLL_L1_EN | 1359 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1360 PM_CTRL_ASPM_L0S_EN); 1361 } 1362 } 1363 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1364 1365 return; 1366 } 1367 1368 /** 1369 * atl1c_configure - Configure Transmit&Receive Unit after Reset 1370 * @adapter: board private structure 1371 * 1372 * Configure the Tx /Rx unit of the MAC after a reset. 1373 */ 1374 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1375 { 1376 struct atl1c_hw *hw = &adapter->hw; 1377 u32 master_ctrl_data = 0; 1378 u32 intr_modrt_data; 1379 u32 data; 1380 1381 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1382 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1383 MASTER_CTRL_RX_ITIMER_EN | 1384 MASTER_CTRL_INT_RDCLR); 1385 /* clear interrupt status */ 1386 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1387 /* Clear any WOL status */ 1388 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1389 /* set Interrupt Clear Timer 1390 * HW will enable self to assert interrupt event to system after 1391 * waiting x-time for software to notify it accept interrupt. 1392 */ 1393 1394 data = CLK_GATING_EN_ALL; 1395 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1396 if (hw->nic_type == athr_l2c_b) 1397 data &= ~CLK_GATING_RXMAC_EN; 1398 } else 1399 data = 0; 1400 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1401 1402 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1403 hw->ict & INT_RETRIG_TIMER_MASK); 1404 1405 atl1c_configure_des_ring(adapter); 1406 1407 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1408 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1409 IRQ_MODRT_TX_TIMER_SHIFT; 1410 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1411 IRQ_MODRT_RX_TIMER_SHIFT; 1412 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1413 master_ctrl_data |= 1414 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1415 } 1416 1417 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1418 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1419 1420 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1421 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1422 1423 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1424 hw->smb_timer & SMB_STAT_TIMER_MASK); 1425 1426 /* set MTU */ 1427 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1428 VLAN_HLEN + ETH_FCS_LEN); 1429 1430 atl1c_configure_tx(adapter); 1431 atl1c_configure_rx(adapter); 1432 atl1c_configure_dma(adapter); 1433 1434 return 0; 1435 } 1436 1437 static int atl1c_configure(struct atl1c_adapter *adapter) 1438 { 1439 struct net_device *netdev = adapter->netdev; 1440 int num; 1441 1442 atl1c_init_ring_ptrs(adapter); 1443 atl1c_set_multi(netdev); 1444 atl1c_restore_vlan(adapter); 1445 1446 num = atl1c_alloc_rx_buffer(adapter); 1447 if (unlikely(num == 0)) 1448 return -ENOMEM; 1449 1450 if (atl1c_configure_mac(adapter)) 1451 return -EIO; 1452 1453 return 0; 1454 } 1455 1456 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1457 { 1458 u16 hw_reg_addr = 0; 1459 unsigned long *stats_item = NULL; 1460 u32 data; 1461 1462 /* update rx status */ 1463 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1464 stats_item = &adapter->hw_stats.rx_ok; 1465 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1466 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1467 *stats_item += data; 1468 stats_item++; 1469 hw_reg_addr += 4; 1470 } 1471 /* update tx status */ 1472 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1473 stats_item = &adapter->hw_stats.tx_ok; 1474 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1475 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1476 *stats_item += data; 1477 stats_item++; 1478 hw_reg_addr += 4; 1479 } 1480 } 1481 1482 /** 1483 * atl1c_get_stats - Get System Network Statistics 1484 * @netdev: network interface device structure 1485 * 1486 * Returns the address of the device statistics structure. 1487 * The statistics are actually updated from the timer callback. 1488 */ 1489 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1490 { 1491 struct atl1c_adapter *adapter = netdev_priv(netdev); 1492 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1493 struct net_device_stats *net_stats = &netdev->stats; 1494 1495 atl1c_update_hw_stats(adapter); 1496 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1497 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1498 net_stats->multicast = hw_stats->rx_mcast; 1499 net_stats->collisions = hw_stats->tx_1_col + 1500 hw_stats->tx_2_col + 1501 hw_stats->tx_late_col + 1502 hw_stats->tx_abort_col; 1503 1504 net_stats->rx_errors = hw_stats->rx_frag + 1505 hw_stats->rx_fcs_err + 1506 hw_stats->rx_len_err + 1507 hw_stats->rx_sz_ov + 1508 hw_stats->rx_rrd_ov + 1509 hw_stats->rx_align_err + 1510 hw_stats->rx_rxf_ov; 1511 1512 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1513 net_stats->rx_length_errors = hw_stats->rx_len_err; 1514 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1515 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1516 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1517 1518 net_stats->tx_errors = hw_stats->tx_late_col + 1519 hw_stats->tx_abort_col + 1520 hw_stats->tx_underrun + 1521 hw_stats->tx_trunc; 1522 1523 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1524 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1525 net_stats->tx_window_errors = hw_stats->tx_late_col; 1526 1527 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1528 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1529 1530 return net_stats; 1531 } 1532 1533 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1534 { 1535 u16 phy_data; 1536 1537 spin_lock(&adapter->mdio_lock); 1538 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1539 spin_unlock(&adapter->mdio_lock); 1540 } 1541 1542 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter, 1543 enum atl1c_trans_queue type) 1544 { 1545 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1546 struct atl1c_buffer *buffer_info; 1547 struct pci_dev *pdev = adapter->pdev; 1548 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1549 u16 hw_next_to_clean; 1550 u16 reg; 1551 unsigned int total_bytes = 0, total_packets = 0; 1552 1553 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX; 1554 1555 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean); 1556 1557 while (next_to_clean != hw_next_to_clean) { 1558 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1559 if (buffer_info->skb) { 1560 total_bytes += buffer_info->skb->len; 1561 total_packets++; 1562 } 1563 atl1c_clean_buffer(pdev, buffer_info); 1564 if (++next_to_clean == tpd_ring->count) 1565 next_to_clean = 0; 1566 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1567 } 1568 1569 netdev_completed_queue(adapter->netdev, total_packets, total_bytes); 1570 1571 if (netif_queue_stopped(adapter->netdev) && 1572 netif_carrier_ok(adapter->netdev)) { 1573 netif_wake_queue(adapter->netdev); 1574 } 1575 1576 return true; 1577 } 1578 1579 /** 1580 * atl1c_intr - Interrupt Handler 1581 * @irq: interrupt number 1582 * @data: pointer to a network interface device structure 1583 */ 1584 static irqreturn_t atl1c_intr(int irq, void *data) 1585 { 1586 struct net_device *netdev = data; 1587 struct atl1c_adapter *adapter = netdev_priv(netdev); 1588 struct pci_dev *pdev = adapter->pdev; 1589 struct atl1c_hw *hw = &adapter->hw; 1590 int max_ints = AT_MAX_INT_WORK; 1591 int handled = IRQ_NONE; 1592 u32 status; 1593 u32 reg_data; 1594 1595 do { 1596 AT_READ_REG(hw, REG_ISR, ®_data); 1597 status = reg_data & hw->intr_mask; 1598 1599 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1600 if (max_ints != AT_MAX_INT_WORK) 1601 handled = IRQ_HANDLED; 1602 break; 1603 } 1604 /* link event */ 1605 if (status & ISR_GPHY) 1606 atl1c_clear_phy_int(adapter); 1607 /* Ack ISR */ 1608 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1609 if (status & ISR_RX_PKT) { 1610 if (likely(napi_schedule_prep(&adapter->napi))) { 1611 hw->intr_mask &= ~ISR_RX_PKT; 1612 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1613 __napi_schedule(&adapter->napi); 1614 } 1615 } 1616 if (status & ISR_TX_PKT) 1617 atl1c_clean_tx_irq(adapter, atl1c_trans_normal); 1618 1619 handled = IRQ_HANDLED; 1620 /* check if PCIE PHY Link down */ 1621 if (status & ISR_ERROR) { 1622 if (netif_msg_hw(adapter)) 1623 dev_err(&pdev->dev, 1624 "atl1c hardware error (status = 0x%x)\n", 1625 status & ISR_ERROR); 1626 /* reset MAC */ 1627 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1628 schedule_work(&adapter->common_task); 1629 return IRQ_HANDLED; 1630 } 1631 1632 if (status & ISR_OVER) 1633 if (netif_msg_intr(adapter)) 1634 dev_warn(&pdev->dev, 1635 "TX/RX overflow (status = 0x%x)\n", 1636 status & ISR_OVER); 1637 1638 /* link event */ 1639 if (status & (ISR_GPHY | ISR_MANUAL)) { 1640 netdev->stats.tx_carrier_errors++; 1641 atl1c_link_chg_event(adapter); 1642 break; 1643 } 1644 1645 } while (--max_ints > 0); 1646 /* re-enable Interrupt*/ 1647 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1648 return handled; 1649 } 1650 1651 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1652 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1653 { 1654 /* 1655 * The pid field in RRS in not correct sometimes, so we 1656 * cannot figure out if the packet is fragmented or not, 1657 * so we tell the KERNEL CHECKSUM_NONE 1658 */ 1659 skb_checksum_none_assert(skb); 1660 } 1661 1662 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter) 1663 { 1664 struct sk_buff *skb; 1665 struct page *page; 1666 1667 if (adapter->rx_frag_size > PAGE_SIZE) 1668 return netdev_alloc_skb(adapter->netdev, 1669 adapter->rx_buffer_len); 1670 1671 page = adapter->rx_page; 1672 if (!page) { 1673 adapter->rx_page = page = alloc_page(GFP_ATOMIC); 1674 if (unlikely(!page)) 1675 return NULL; 1676 adapter->rx_page_offset = 0; 1677 } 1678 1679 skb = build_skb(page_address(page) + adapter->rx_page_offset, 1680 adapter->rx_frag_size); 1681 if (likely(skb)) { 1682 adapter->rx_page_offset += adapter->rx_frag_size; 1683 if (adapter->rx_page_offset >= PAGE_SIZE) 1684 adapter->rx_page = NULL; 1685 else 1686 get_page(page); 1687 } 1688 return skb; 1689 } 1690 1691 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter) 1692 { 1693 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1694 struct pci_dev *pdev = adapter->pdev; 1695 struct atl1c_buffer *buffer_info, *next_info; 1696 struct sk_buff *skb; 1697 void *vir_addr = NULL; 1698 u16 num_alloc = 0; 1699 u16 rfd_next_to_use, next_next; 1700 struct atl1c_rx_free_desc *rfd_desc; 1701 dma_addr_t mapping; 1702 1703 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1704 if (++next_next == rfd_ring->count) 1705 next_next = 0; 1706 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1707 next_info = &rfd_ring->buffer_info[next_next]; 1708 1709 while (next_info->flags & ATL1C_BUFFER_FREE) { 1710 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1711 1712 skb = atl1c_alloc_skb(adapter); 1713 if (unlikely(!skb)) { 1714 if (netif_msg_rx_err(adapter)) 1715 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1716 break; 1717 } 1718 1719 /* 1720 * Make buffer alignment 2 beyond a 16 byte boundary 1721 * this will result in a 16 byte aligned IP header after 1722 * the 14 byte MAC header is removed 1723 */ 1724 vir_addr = skb->data; 1725 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1726 buffer_info->skb = skb; 1727 buffer_info->length = adapter->rx_buffer_len; 1728 mapping = pci_map_single(pdev, vir_addr, 1729 buffer_info->length, 1730 PCI_DMA_FROMDEVICE); 1731 if (unlikely(pci_dma_mapping_error(pdev, mapping))) { 1732 dev_kfree_skb(skb); 1733 buffer_info->skb = NULL; 1734 buffer_info->length = 0; 1735 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1736 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1737 break; 1738 } 1739 buffer_info->dma = mapping; 1740 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1741 ATL1C_PCIMAP_FROMDEVICE); 1742 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1743 rfd_next_to_use = next_next; 1744 if (++next_next == rfd_ring->count) 1745 next_next = 0; 1746 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1747 next_info = &rfd_ring->buffer_info[next_next]; 1748 num_alloc++; 1749 } 1750 1751 if (num_alloc) { 1752 /* TODO: update mailbox here */ 1753 wmb(); 1754 rfd_ring->next_to_use = rfd_next_to_use; 1755 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1756 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1757 } 1758 1759 return num_alloc; 1760 } 1761 1762 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1763 struct atl1c_recv_ret_status *rrs, u16 num) 1764 { 1765 u16 i; 1766 /* the relationship between rrd and rfd is one map one */ 1767 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1768 rrd_ring->next_to_clean)) { 1769 rrs->word3 &= ~RRS_RXD_UPDATED; 1770 if (++rrd_ring->next_to_clean == rrd_ring->count) 1771 rrd_ring->next_to_clean = 0; 1772 } 1773 } 1774 1775 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1776 struct atl1c_recv_ret_status *rrs, u16 num) 1777 { 1778 u16 i; 1779 u16 rfd_index; 1780 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1781 1782 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1783 RRS_RX_RFD_INDEX_MASK; 1784 for (i = 0; i < num; i++) { 1785 buffer_info[rfd_index].skb = NULL; 1786 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1787 ATL1C_BUFFER_FREE); 1788 if (++rfd_index == rfd_ring->count) 1789 rfd_index = 0; 1790 } 1791 rfd_ring->next_to_clean = rfd_index; 1792 } 1793 1794 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1795 int *work_done, int work_to_do) 1796 { 1797 u16 rfd_num, rfd_index; 1798 u16 count = 0; 1799 u16 length; 1800 struct pci_dev *pdev = adapter->pdev; 1801 struct net_device *netdev = adapter->netdev; 1802 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1803 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1804 struct sk_buff *skb; 1805 struct atl1c_recv_ret_status *rrs; 1806 struct atl1c_buffer *buffer_info; 1807 1808 while (1) { 1809 if (*work_done >= work_to_do) 1810 break; 1811 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1812 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1813 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1814 RRS_RX_RFD_CNT_MASK; 1815 if (unlikely(rfd_num != 1)) 1816 /* TODO support mul rfd*/ 1817 if (netif_msg_rx_err(adapter)) 1818 dev_warn(&pdev->dev, 1819 "Multi rfd not support yet!\n"); 1820 goto rrs_checked; 1821 } else { 1822 break; 1823 } 1824 rrs_checked: 1825 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1826 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1827 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1828 if (netif_msg_rx_err(adapter)) 1829 dev_warn(&pdev->dev, 1830 "wrong packet! rrs word3 is %x\n", 1831 rrs->word3); 1832 continue; 1833 } 1834 1835 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1836 RRS_PKT_SIZE_MASK); 1837 /* Good Receive */ 1838 if (likely(rfd_num == 1)) { 1839 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1840 RRS_RX_RFD_INDEX_MASK; 1841 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1842 pci_unmap_single(pdev, buffer_info->dma, 1843 buffer_info->length, PCI_DMA_FROMDEVICE); 1844 skb = buffer_info->skb; 1845 } else { 1846 /* TODO */ 1847 if (netif_msg_rx_err(adapter)) 1848 dev_warn(&pdev->dev, 1849 "Multi rfd not support yet!\n"); 1850 break; 1851 } 1852 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1853 skb_put(skb, length - ETH_FCS_LEN); 1854 skb->protocol = eth_type_trans(skb, netdev); 1855 atl1c_rx_checksum(adapter, skb, rrs); 1856 if (rrs->word3 & RRS_VLAN_INS) { 1857 u16 vlan; 1858 1859 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1860 vlan = le16_to_cpu(vlan); 1861 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1862 } 1863 netif_receive_skb(skb); 1864 1865 (*work_done)++; 1866 count++; 1867 } 1868 if (count) 1869 atl1c_alloc_rx_buffer(adapter); 1870 } 1871 1872 /** 1873 * atl1c_clean - NAPI Rx polling callback 1874 */ 1875 static int atl1c_clean(struct napi_struct *napi, int budget) 1876 { 1877 struct atl1c_adapter *adapter = 1878 container_of(napi, struct atl1c_adapter, napi); 1879 int work_done = 0; 1880 1881 /* Keep link state information with original netdev */ 1882 if (!netif_carrier_ok(adapter->netdev)) 1883 goto quit_polling; 1884 /* just enable one RXQ */ 1885 atl1c_clean_rx_irq(adapter, &work_done, budget); 1886 1887 if (work_done < budget) { 1888 quit_polling: 1889 napi_complete(napi); 1890 adapter->hw.intr_mask |= ISR_RX_PKT; 1891 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1892 } 1893 return work_done; 1894 } 1895 1896 #ifdef CONFIG_NET_POLL_CONTROLLER 1897 1898 /* 1899 * Polling 'interrupt' - used by things like netconsole to send skbs 1900 * without having to re-enable interrupts. It's not called while 1901 * the interrupt routine is executing. 1902 */ 1903 static void atl1c_netpoll(struct net_device *netdev) 1904 { 1905 struct atl1c_adapter *adapter = netdev_priv(netdev); 1906 1907 disable_irq(adapter->pdev->irq); 1908 atl1c_intr(adapter->pdev->irq, netdev); 1909 enable_irq(adapter->pdev->irq); 1910 } 1911 #endif 1912 1913 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1914 { 1915 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1916 u16 next_to_use = 0; 1917 u16 next_to_clean = 0; 1918 1919 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1920 next_to_use = tpd_ring->next_to_use; 1921 1922 return (u16)(next_to_clean > next_to_use) ? 1923 (next_to_clean - next_to_use - 1) : 1924 (tpd_ring->count + next_to_clean - next_to_use - 1); 1925 } 1926 1927 /* 1928 * get next usable tpd 1929 * Note: should call atl1c_tdp_avail to make sure 1930 * there is enough tpd to use 1931 */ 1932 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1933 enum atl1c_trans_queue type) 1934 { 1935 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1936 struct atl1c_tpd_desc *tpd_desc; 1937 u16 next_to_use = 0; 1938 1939 next_to_use = tpd_ring->next_to_use; 1940 if (++tpd_ring->next_to_use == tpd_ring->count) 1941 tpd_ring->next_to_use = 0; 1942 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1943 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1944 return tpd_desc; 1945 } 1946 1947 static struct atl1c_buffer * 1948 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1949 { 1950 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1951 1952 return &tpd_ring->buffer_info[tpd - 1953 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1954 } 1955 1956 /* Calculate the transmit packet descript needed*/ 1957 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1958 { 1959 u16 tpd_req; 1960 u16 proto_hdr_len = 0; 1961 1962 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1963 1964 if (skb_is_gso(skb)) { 1965 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1966 if (proto_hdr_len < skb_headlen(skb)) 1967 tpd_req++; 1968 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1969 tpd_req++; 1970 } 1971 return tpd_req; 1972 } 1973 1974 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1975 struct sk_buff *skb, 1976 struct atl1c_tpd_desc **tpd, 1977 enum atl1c_trans_queue type) 1978 { 1979 struct pci_dev *pdev = adapter->pdev; 1980 unsigned short offload_type; 1981 u8 hdr_len; 1982 u32 real_len; 1983 1984 if (skb_is_gso(skb)) { 1985 int err; 1986 1987 err = skb_cow_head(skb, 0); 1988 if (err < 0) 1989 return err; 1990 1991 offload_type = skb_shinfo(skb)->gso_type; 1992 1993 if (offload_type & SKB_GSO_TCPV4) { 1994 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1995 + ntohs(ip_hdr(skb)->tot_len)); 1996 1997 if (real_len < skb->len) 1998 pskb_trim(skb, real_len); 1999 2000 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2001 if (unlikely(skb->len == hdr_len)) { 2002 /* only xsum need */ 2003 if (netif_msg_tx_queued(adapter)) 2004 dev_warn(&pdev->dev, 2005 "IPV4 tso with zero data??\n"); 2006 goto check_sum; 2007 } else { 2008 ip_hdr(skb)->check = 0; 2009 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2010 ip_hdr(skb)->saddr, 2011 ip_hdr(skb)->daddr, 2012 0, IPPROTO_TCP, 0); 2013 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2014 } 2015 } 2016 2017 if (offload_type & SKB_GSO_TCPV6) { 2018 struct atl1c_tpd_ext_desc *etpd = 2019 *(struct atl1c_tpd_ext_desc **)(tpd); 2020 2021 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2022 *tpd = atl1c_get_tpd(adapter, type); 2023 ipv6_hdr(skb)->payload_len = 0; 2024 /* check payload == 0 byte ? */ 2025 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2026 if (unlikely(skb->len == hdr_len)) { 2027 /* only xsum need */ 2028 if (netif_msg_tx_queued(adapter)) 2029 dev_warn(&pdev->dev, 2030 "IPV6 tso with zero data??\n"); 2031 goto check_sum; 2032 } else 2033 tcp_hdr(skb)->check = ~csum_ipv6_magic( 2034 &ipv6_hdr(skb)->saddr, 2035 &ipv6_hdr(skb)->daddr, 2036 0, IPPROTO_TCP, 0); 2037 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2038 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2039 etpd->pkt_len = cpu_to_le32(skb->len); 2040 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2041 } 2042 2043 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2044 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2045 TPD_TCPHDR_OFFSET_SHIFT; 2046 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2047 TPD_MSS_SHIFT; 2048 return 0; 2049 } 2050 2051 check_sum: 2052 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2053 u8 css, cso; 2054 cso = skb_checksum_start_offset(skb); 2055 2056 if (unlikely(cso & 0x1)) { 2057 if (netif_msg_tx_err(adapter)) 2058 dev_err(&adapter->pdev->dev, 2059 "payload offset should not an event number\n"); 2060 return -1; 2061 } else { 2062 css = cso + skb->csum_offset; 2063 2064 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2065 TPD_PLOADOFFSET_SHIFT; 2066 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2067 TPD_CCSUM_OFFSET_SHIFT; 2068 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2069 } 2070 } 2071 return 0; 2072 } 2073 2074 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2075 struct atl1c_tpd_desc *first_tpd, 2076 enum atl1c_trans_queue type) 2077 { 2078 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2079 struct atl1c_buffer *buffer_info; 2080 struct atl1c_tpd_desc *tpd; 2081 u16 first_index, index; 2082 2083 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2084 index = first_index; 2085 while (index != tpd_ring->next_to_use) { 2086 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2087 buffer_info = &tpd_ring->buffer_info[index]; 2088 atl1c_clean_buffer(adpt->pdev, buffer_info); 2089 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2090 if (++index == tpd_ring->count) 2091 index = 0; 2092 } 2093 tpd_ring->next_to_use = first_index; 2094 } 2095 2096 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2097 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2098 enum atl1c_trans_queue type) 2099 { 2100 struct atl1c_tpd_desc *use_tpd = NULL; 2101 struct atl1c_buffer *buffer_info = NULL; 2102 u16 buf_len = skb_headlen(skb); 2103 u16 map_len = 0; 2104 u16 mapped_len = 0; 2105 u16 hdr_len = 0; 2106 u16 nr_frags; 2107 u16 f; 2108 int tso; 2109 2110 nr_frags = skb_shinfo(skb)->nr_frags; 2111 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2112 if (tso) { 2113 /* TSO */ 2114 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2115 use_tpd = tpd; 2116 2117 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2118 buffer_info->length = map_len; 2119 buffer_info->dma = pci_map_single(adapter->pdev, 2120 skb->data, hdr_len, PCI_DMA_TODEVICE); 2121 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2122 buffer_info->dma))) 2123 goto err_dma; 2124 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2125 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2126 ATL1C_PCIMAP_TODEVICE); 2127 mapped_len += map_len; 2128 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2129 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2130 } 2131 2132 if (mapped_len < buf_len) { 2133 /* mapped_len == 0, means we should use the first tpd, 2134 which is given by caller */ 2135 if (mapped_len == 0) 2136 use_tpd = tpd; 2137 else { 2138 use_tpd = atl1c_get_tpd(adapter, type); 2139 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2140 } 2141 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2142 buffer_info->length = buf_len - mapped_len; 2143 buffer_info->dma = 2144 pci_map_single(adapter->pdev, skb->data + mapped_len, 2145 buffer_info->length, PCI_DMA_TODEVICE); 2146 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2147 buffer_info->dma))) 2148 goto err_dma; 2149 2150 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2151 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2152 ATL1C_PCIMAP_TODEVICE); 2153 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2154 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2155 } 2156 2157 for (f = 0; f < nr_frags; f++) { 2158 struct skb_frag_struct *frag; 2159 2160 frag = &skb_shinfo(skb)->frags[f]; 2161 2162 use_tpd = atl1c_get_tpd(adapter, type); 2163 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2164 2165 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2166 buffer_info->length = skb_frag_size(frag); 2167 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2168 frag, 0, 2169 buffer_info->length, 2170 DMA_TO_DEVICE); 2171 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2172 goto err_dma; 2173 2174 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2175 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2176 ATL1C_PCIMAP_TODEVICE); 2177 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2178 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2179 } 2180 2181 /* The last tpd */ 2182 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2183 /* The last buffer info contain the skb address, 2184 so it will be free after unmap */ 2185 buffer_info->skb = skb; 2186 2187 return 0; 2188 2189 err_dma: 2190 buffer_info->dma = 0; 2191 buffer_info->length = 0; 2192 return -1; 2193 } 2194 2195 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2196 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2197 { 2198 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2199 u16 reg; 2200 2201 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2202 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2203 } 2204 2205 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2206 struct net_device *netdev) 2207 { 2208 struct atl1c_adapter *adapter = netdev_priv(netdev); 2209 unsigned long flags; 2210 u16 tpd_req = 1; 2211 struct atl1c_tpd_desc *tpd; 2212 enum atl1c_trans_queue type = atl1c_trans_normal; 2213 2214 if (test_bit(__AT_DOWN, &adapter->flags)) { 2215 dev_kfree_skb_any(skb); 2216 return NETDEV_TX_OK; 2217 } 2218 2219 tpd_req = atl1c_cal_tpd_req(skb); 2220 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) { 2221 if (netif_msg_pktdata(adapter)) 2222 dev_info(&adapter->pdev->dev, "tx locked\n"); 2223 return NETDEV_TX_LOCKED; 2224 } 2225 2226 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2227 /* no enough descriptor, just stop queue */ 2228 netif_stop_queue(netdev); 2229 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2230 return NETDEV_TX_BUSY; 2231 } 2232 2233 tpd = atl1c_get_tpd(adapter, type); 2234 2235 /* do TSO and check sum */ 2236 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2237 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2238 dev_kfree_skb_any(skb); 2239 return NETDEV_TX_OK; 2240 } 2241 2242 if (unlikely(skb_vlan_tag_present(skb))) { 2243 u16 vlan = skb_vlan_tag_get(skb); 2244 __le16 tag; 2245 2246 vlan = cpu_to_le16(vlan); 2247 AT_VLAN_TO_TAG(vlan, tag); 2248 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2249 tpd->vlan_tag = tag; 2250 } 2251 2252 if (skb_network_offset(skb) != ETH_HLEN) 2253 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2254 2255 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2256 netif_info(adapter, tx_done, adapter->netdev, 2257 "tx-skb droppted due to dma error\n"); 2258 /* roll back tpd/buffer */ 2259 atl1c_tx_rollback(adapter, tpd, type); 2260 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2261 dev_kfree_skb_any(skb); 2262 } else { 2263 netdev_sent_queue(adapter->netdev, skb->len); 2264 atl1c_tx_queue(adapter, skb, tpd, type); 2265 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2266 } 2267 2268 return NETDEV_TX_OK; 2269 } 2270 2271 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2272 { 2273 struct net_device *netdev = adapter->netdev; 2274 2275 free_irq(adapter->pdev->irq, netdev); 2276 2277 if (adapter->have_msi) 2278 pci_disable_msi(adapter->pdev); 2279 } 2280 2281 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2282 { 2283 struct pci_dev *pdev = adapter->pdev; 2284 struct net_device *netdev = adapter->netdev; 2285 int flags = 0; 2286 int err = 0; 2287 2288 adapter->have_msi = true; 2289 err = pci_enable_msi(adapter->pdev); 2290 if (err) { 2291 if (netif_msg_ifup(adapter)) 2292 dev_err(&pdev->dev, 2293 "Unable to allocate MSI interrupt Error: %d\n", 2294 err); 2295 adapter->have_msi = false; 2296 } 2297 2298 if (!adapter->have_msi) 2299 flags |= IRQF_SHARED; 2300 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2301 netdev->name, netdev); 2302 if (err) { 2303 if (netif_msg_ifup(adapter)) 2304 dev_err(&pdev->dev, 2305 "Unable to allocate interrupt Error: %d\n", 2306 err); 2307 if (adapter->have_msi) 2308 pci_disable_msi(adapter->pdev); 2309 return err; 2310 } 2311 if (netif_msg_ifup(adapter)) 2312 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2313 return err; 2314 } 2315 2316 2317 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2318 { 2319 /* release tx-pending skbs and reset tx/rx ring index */ 2320 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2321 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2322 atl1c_clean_rx_ring(adapter); 2323 } 2324 2325 static int atl1c_up(struct atl1c_adapter *adapter) 2326 { 2327 struct net_device *netdev = adapter->netdev; 2328 int err; 2329 2330 netif_carrier_off(netdev); 2331 2332 err = atl1c_configure(adapter); 2333 if (unlikely(err)) 2334 goto err_up; 2335 2336 err = atl1c_request_irq(adapter); 2337 if (unlikely(err)) 2338 goto err_up; 2339 2340 atl1c_check_link_status(adapter); 2341 clear_bit(__AT_DOWN, &adapter->flags); 2342 napi_enable(&adapter->napi); 2343 atl1c_irq_enable(adapter); 2344 netif_start_queue(netdev); 2345 return err; 2346 2347 err_up: 2348 atl1c_clean_rx_ring(adapter); 2349 return err; 2350 } 2351 2352 static void atl1c_down(struct atl1c_adapter *adapter) 2353 { 2354 struct net_device *netdev = adapter->netdev; 2355 2356 atl1c_del_timer(adapter); 2357 adapter->work_event = 0; /* clear all event */ 2358 /* signal that we're down so the interrupt handler does not 2359 * reschedule our watchdog timer */ 2360 set_bit(__AT_DOWN, &adapter->flags); 2361 netif_carrier_off(netdev); 2362 napi_disable(&adapter->napi); 2363 atl1c_irq_disable(adapter); 2364 atl1c_free_irq(adapter); 2365 /* disable ASPM if device inactive */ 2366 atl1c_disable_l0s_l1(&adapter->hw); 2367 /* reset MAC to disable all RX/TX */ 2368 atl1c_reset_mac(&adapter->hw); 2369 msleep(1); 2370 2371 adapter->link_speed = SPEED_0; 2372 adapter->link_duplex = -1; 2373 atl1c_reset_dma_ring(adapter); 2374 } 2375 2376 /** 2377 * atl1c_open - Called when a network interface is made active 2378 * @netdev: network interface device structure 2379 * 2380 * Returns 0 on success, negative value on failure 2381 * 2382 * The open entry point is called when a network interface is made 2383 * active by the system (IFF_UP). At this point all resources needed 2384 * for transmit and receive operations are allocated, the interrupt 2385 * handler is registered with the OS, the watchdog timer is started, 2386 * and the stack is notified that the interface is ready. 2387 */ 2388 static int atl1c_open(struct net_device *netdev) 2389 { 2390 struct atl1c_adapter *adapter = netdev_priv(netdev); 2391 int err; 2392 2393 /* disallow open during test */ 2394 if (test_bit(__AT_TESTING, &adapter->flags)) 2395 return -EBUSY; 2396 2397 /* allocate rx/tx dma buffer & descriptors */ 2398 err = atl1c_setup_ring_resources(adapter); 2399 if (unlikely(err)) 2400 return err; 2401 2402 err = atl1c_up(adapter); 2403 if (unlikely(err)) 2404 goto err_up; 2405 2406 return 0; 2407 2408 err_up: 2409 atl1c_free_irq(adapter); 2410 atl1c_free_ring_resources(adapter); 2411 atl1c_reset_mac(&adapter->hw); 2412 return err; 2413 } 2414 2415 /** 2416 * atl1c_close - Disables a network interface 2417 * @netdev: network interface device structure 2418 * 2419 * Returns 0, this is not allowed to fail 2420 * 2421 * The close entry point is called when an interface is de-activated 2422 * by the OS. The hardware is still under the drivers control, but 2423 * needs to be disabled. A global MAC reset is issued to stop the 2424 * hardware, and all transmit and receive resources are freed. 2425 */ 2426 static int atl1c_close(struct net_device *netdev) 2427 { 2428 struct atl1c_adapter *adapter = netdev_priv(netdev); 2429 2430 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2431 set_bit(__AT_DOWN, &adapter->flags); 2432 cancel_work_sync(&adapter->common_task); 2433 atl1c_down(adapter); 2434 atl1c_free_ring_resources(adapter); 2435 return 0; 2436 } 2437 2438 static int atl1c_suspend(struct device *dev) 2439 { 2440 struct pci_dev *pdev = to_pci_dev(dev); 2441 struct net_device *netdev = pci_get_drvdata(pdev); 2442 struct atl1c_adapter *adapter = netdev_priv(netdev); 2443 struct atl1c_hw *hw = &adapter->hw; 2444 u32 wufc = adapter->wol; 2445 2446 atl1c_disable_l0s_l1(hw); 2447 if (netif_running(netdev)) { 2448 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2449 atl1c_down(adapter); 2450 } 2451 netif_device_detach(netdev); 2452 2453 if (wufc) 2454 if (atl1c_phy_to_ps_link(hw) != 0) 2455 dev_dbg(&pdev->dev, "phy power saving failed"); 2456 2457 atl1c_power_saving(hw, wufc); 2458 2459 return 0; 2460 } 2461 2462 #ifdef CONFIG_PM_SLEEP 2463 static int atl1c_resume(struct device *dev) 2464 { 2465 struct pci_dev *pdev = to_pci_dev(dev); 2466 struct net_device *netdev = pci_get_drvdata(pdev); 2467 struct atl1c_adapter *adapter = netdev_priv(netdev); 2468 2469 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2470 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2471 2472 atl1c_phy_reset(&adapter->hw); 2473 atl1c_reset_mac(&adapter->hw); 2474 atl1c_phy_init(&adapter->hw); 2475 2476 #if 0 2477 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data); 2478 pm_data &= ~PM_CTRLSTAT_PME_EN; 2479 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data); 2480 #endif 2481 2482 netif_device_attach(netdev); 2483 if (netif_running(netdev)) 2484 atl1c_up(adapter); 2485 2486 return 0; 2487 } 2488 #endif 2489 2490 static void atl1c_shutdown(struct pci_dev *pdev) 2491 { 2492 struct net_device *netdev = pci_get_drvdata(pdev); 2493 struct atl1c_adapter *adapter = netdev_priv(netdev); 2494 2495 atl1c_suspend(&pdev->dev); 2496 pci_wake_from_d3(pdev, adapter->wol); 2497 pci_set_power_state(pdev, PCI_D3hot); 2498 } 2499 2500 static const struct net_device_ops atl1c_netdev_ops = { 2501 .ndo_open = atl1c_open, 2502 .ndo_stop = atl1c_close, 2503 .ndo_validate_addr = eth_validate_addr, 2504 .ndo_start_xmit = atl1c_xmit_frame, 2505 .ndo_set_mac_address = atl1c_set_mac_addr, 2506 .ndo_set_rx_mode = atl1c_set_multi, 2507 .ndo_change_mtu = atl1c_change_mtu, 2508 .ndo_fix_features = atl1c_fix_features, 2509 .ndo_set_features = atl1c_set_features, 2510 .ndo_do_ioctl = atl1c_ioctl, 2511 .ndo_tx_timeout = atl1c_tx_timeout, 2512 .ndo_get_stats = atl1c_get_stats, 2513 #ifdef CONFIG_NET_POLL_CONTROLLER 2514 .ndo_poll_controller = atl1c_netpoll, 2515 #endif 2516 }; 2517 2518 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2519 { 2520 SET_NETDEV_DEV(netdev, &pdev->dev); 2521 pci_set_drvdata(pdev, netdev); 2522 2523 netdev->netdev_ops = &atl1c_netdev_ops; 2524 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2525 atl1c_set_ethtool_ops(netdev); 2526 2527 /* TODO: add when ready */ 2528 netdev->hw_features = NETIF_F_SG | 2529 NETIF_F_HW_CSUM | 2530 NETIF_F_HW_VLAN_CTAG_RX | 2531 NETIF_F_TSO | 2532 NETIF_F_TSO6; 2533 netdev->features = netdev->hw_features | 2534 NETIF_F_HW_VLAN_CTAG_TX; 2535 return 0; 2536 } 2537 2538 /** 2539 * atl1c_probe - Device Initialization Routine 2540 * @pdev: PCI device information struct 2541 * @ent: entry in atl1c_pci_tbl 2542 * 2543 * Returns 0 on success, negative on failure 2544 * 2545 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2546 * The OS initialization, configuring of the adapter private structure, 2547 * and a hardware reset occur. 2548 */ 2549 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2550 { 2551 struct net_device *netdev; 2552 struct atl1c_adapter *adapter; 2553 static int cards_found; 2554 2555 int err = 0; 2556 2557 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2558 err = pci_enable_device_mem(pdev); 2559 if (err) { 2560 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2561 return err; 2562 } 2563 2564 /* 2565 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2566 * shared register for the high 32 bits, so only a single, aligned, 2567 * 4 GB physical address range can be used at a time. 2568 * 2569 * Supporting 64-bit DMA on this hardware is more trouble than it's 2570 * worth. It is far easier to limit to 32-bit DMA than update 2571 * various kernel subsystems to support the mechanics required by a 2572 * fixed-high-32-bit system. 2573 */ 2574 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || 2575 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) { 2576 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2577 goto err_dma; 2578 } 2579 2580 err = pci_request_regions(pdev, atl1c_driver_name); 2581 if (err) { 2582 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2583 goto err_pci_reg; 2584 } 2585 2586 pci_set_master(pdev); 2587 2588 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2589 if (netdev == NULL) { 2590 err = -ENOMEM; 2591 goto err_alloc_etherdev; 2592 } 2593 2594 err = atl1c_init_netdev(netdev, pdev); 2595 if (err) { 2596 dev_err(&pdev->dev, "init netdevice failed\n"); 2597 goto err_init_netdev; 2598 } 2599 adapter = netdev_priv(netdev); 2600 adapter->bd_number = cards_found; 2601 adapter->netdev = netdev; 2602 adapter->pdev = pdev; 2603 adapter->hw.adapter = adapter; 2604 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2605 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2606 if (!adapter->hw.hw_addr) { 2607 err = -EIO; 2608 dev_err(&pdev->dev, "cannot map device registers\n"); 2609 goto err_ioremap; 2610 } 2611 2612 /* init mii data */ 2613 adapter->mii.dev = netdev; 2614 adapter->mii.mdio_read = atl1c_mdio_read; 2615 adapter->mii.mdio_write = atl1c_mdio_write; 2616 adapter->mii.phy_id_mask = 0x1f; 2617 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2618 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2619 setup_timer(&adapter->phy_config_timer, atl1c_phy_config, 2620 (unsigned long)adapter); 2621 /* setup the private structure */ 2622 err = atl1c_sw_init(adapter); 2623 if (err) { 2624 dev_err(&pdev->dev, "net device private data init failed\n"); 2625 goto err_sw_init; 2626 } 2627 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2628 2629 /* Init GPHY as early as possible due to power saving issue */ 2630 atl1c_phy_reset(&adapter->hw); 2631 2632 err = atl1c_reset_mac(&adapter->hw); 2633 if (err) { 2634 err = -EIO; 2635 goto err_reset; 2636 } 2637 2638 /* reset the controller to 2639 * put the device in a known good starting state */ 2640 err = atl1c_phy_init(&adapter->hw); 2641 if (err) { 2642 err = -EIO; 2643 goto err_reset; 2644 } 2645 if (atl1c_read_mac_addr(&adapter->hw)) { 2646 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2647 netdev->addr_assign_type = NET_ADDR_RANDOM; 2648 } 2649 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2650 if (netif_msg_probe(adapter)) 2651 dev_dbg(&pdev->dev, "mac address : %pM\n", 2652 adapter->hw.mac_addr); 2653 2654 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2655 INIT_WORK(&adapter->common_task, atl1c_common_task); 2656 adapter->work_event = 0; 2657 err = register_netdev(netdev); 2658 if (err) { 2659 dev_err(&pdev->dev, "register netdevice failed\n"); 2660 goto err_register; 2661 } 2662 2663 if (netif_msg_probe(adapter)) 2664 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION); 2665 cards_found++; 2666 return 0; 2667 2668 err_reset: 2669 err_register: 2670 err_sw_init: 2671 iounmap(adapter->hw.hw_addr); 2672 err_init_netdev: 2673 err_ioremap: 2674 free_netdev(netdev); 2675 err_alloc_etherdev: 2676 pci_release_regions(pdev); 2677 err_pci_reg: 2678 err_dma: 2679 pci_disable_device(pdev); 2680 return err; 2681 } 2682 2683 /** 2684 * atl1c_remove - Device Removal Routine 2685 * @pdev: PCI device information struct 2686 * 2687 * atl1c_remove is called by the PCI subsystem to alert the driver 2688 * that it should release a PCI device. The could be caused by a 2689 * Hot-Plug event, or because the driver is going to be removed from 2690 * memory. 2691 */ 2692 static void atl1c_remove(struct pci_dev *pdev) 2693 { 2694 struct net_device *netdev = pci_get_drvdata(pdev); 2695 struct atl1c_adapter *adapter = netdev_priv(netdev); 2696 2697 unregister_netdev(netdev); 2698 /* restore permanent address */ 2699 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2700 atl1c_phy_disable(&adapter->hw); 2701 2702 iounmap(adapter->hw.hw_addr); 2703 2704 pci_release_regions(pdev); 2705 pci_disable_device(pdev); 2706 free_netdev(netdev); 2707 } 2708 2709 /** 2710 * atl1c_io_error_detected - called when PCI error is detected 2711 * @pdev: Pointer to PCI device 2712 * @state: The current pci connection state 2713 * 2714 * This function is called after a PCI bus error affecting 2715 * this device has been detected. 2716 */ 2717 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2718 pci_channel_state_t state) 2719 { 2720 struct net_device *netdev = pci_get_drvdata(pdev); 2721 struct atl1c_adapter *adapter = netdev_priv(netdev); 2722 2723 netif_device_detach(netdev); 2724 2725 if (state == pci_channel_io_perm_failure) 2726 return PCI_ERS_RESULT_DISCONNECT; 2727 2728 if (netif_running(netdev)) 2729 atl1c_down(adapter); 2730 2731 pci_disable_device(pdev); 2732 2733 /* Request a slot slot reset. */ 2734 return PCI_ERS_RESULT_NEED_RESET; 2735 } 2736 2737 /** 2738 * atl1c_io_slot_reset - called after the pci bus has been reset. 2739 * @pdev: Pointer to PCI device 2740 * 2741 * Restart the card from scratch, as if from a cold-boot. Implementation 2742 * resembles the first-half of the e1000_resume routine. 2743 */ 2744 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2745 { 2746 struct net_device *netdev = pci_get_drvdata(pdev); 2747 struct atl1c_adapter *adapter = netdev_priv(netdev); 2748 2749 if (pci_enable_device(pdev)) { 2750 if (netif_msg_hw(adapter)) 2751 dev_err(&pdev->dev, 2752 "Cannot re-enable PCI device after reset\n"); 2753 return PCI_ERS_RESULT_DISCONNECT; 2754 } 2755 pci_set_master(pdev); 2756 2757 pci_enable_wake(pdev, PCI_D3hot, 0); 2758 pci_enable_wake(pdev, PCI_D3cold, 0); 2759 2760 atl1c_reset_mac(&adapter->hw); 2761 2762 return PCI_ERS_RESULT_RECOVERED; 2763 } 2764 2765 /** 2766 * atl1c_io_resume - called when traffic can start flowing again. 2767 * @pdev: Pointer to PCI device 2768 * 2769 * This callback is called when the error recovery driver tells us that 2770 * its OK to resume normal operation. Implementation resembles the 2771 * second-half of the atl1c_resume routine. 2772 */ 2773 static void atl1c_io_resume(struct pci_dev *pdev) 2774 { 2775 struct net_device *netdev = pci_get_drvdata(pdev); 2776 struct atl1c_adapter *adapter = netdev_priv(netdev); 2777 2778 if (netif_running(netdev)) { 2779 if (atl1c_up(adapter)) { 2780 if (netif_msg_hw(adapter)) 2781 dev_err(&pdev->dev, 2782 "Cannot bring device back up after reset\n"); 2783 return; 2784 } 2785 } 2786 2787 netif_device_attach(netdev); 2788 } 2789 2790 static const struct pci_error_handlers atl1c_err_handler = { 2791 .error_detected = atl1c_io_error_detected, 2792 .slot_reset = atl1c_io_slot_reset, 2793 .resume = atl1c_io_resume, 2794 }; 2795 2796 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2797 2798 static struct pci_driver atl1c_driver = { 2799 .name = atl1c_driver_name, 2800 .id_table = atl1c_pci_tbl, 2801 .probe = atl1c_probe, 2802 .remove = atl1c_remove, 2803 .shutdown = atl1c_shutdown, 2804 .err_handler = &atl1c_err_handler, 2805 .driver.pm = &atl1c_pm_ops, 2806 }; 2807 2808 module_pci_driver(atl1c_driver); 2809