1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved. 4 * 5 * Derived from Intel e1000 driver 6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. 7 */ 8 9 #include "atl1c.h" 10 11 char atl1c_driver_name[] = "atl1c"; 12 13 /* 14 * atl1c_pci_tbl - PCI Device ID Table 15 * 16 * Wildcard entries (PCI_ANY_ID) should come last 17 * Last entry must be all 0s 18 * 19 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 20 * Class, Class Mask, private data (not used) } 21 */ 22 static const struct pci_device_id atl1c_pci_tbl[] = { 23 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)}, 24 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)}, 25 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)}, 26 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)}, 27 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)}, 28 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)}, 29 /* required last entry */ 30 { 0 } 31 }; 32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl); 33 34 MODULE_AUTHOR("Jie Yang"); 35 MODULE_AUTHOR("Qualcomm Atheros Inc."); 36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver"); 37 MODULE_LICENSE("GPL"); 38 39 static int atl1c_stop_mac(struct atl1c_hw *hw); 40 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw); 41 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed); 42 static void atl1c_start_mac(struct atl1c_adapter *adapter); 43 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 44 int *work_done, int work_to_do); 45 static int atl1c_up(struct atl1c_adapter *adapter); 46 static void atl1c_down(struct atl1c_adapter *adapter); 47 static int atl1c_reset_mac(struct atl1c_hw *hw); 48 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); 49 static int atl1c_configure(struct atl1c_adapter *adapter); 50 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, bool napi_mode); 51 52 53 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | 54 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP; 55 static void atl1c_pcie_patch(struct atl1c_hw *hw) 56 { 57 u32 mst_data, data; 58 59 /* pclk sel could switch to 25M */ 60 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data); 61 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS; 62 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data); 63 64 /* WoL/PCIE related settings */ 65 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) { 66 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data); 67 data |= PCIE_PHYMISC_FORCE_RCV_DET; 68 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data); 69 } else { /* new dev set bit5 of MASTER */ 70 if (!(mst_data & MASTER_CTRL_WAKEN_25M)) 71 AT_WRITE_REG(hw, REG_MASTER_CTRL, 72 mst_data | MASTER_CTRL_WAKEN_25M); 73 } 74 /* aspm/PCIE setting only for l2cb 1.0 */ 75 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) { 76 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data); 77 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW, 78 L2CB1_PCIE_PHYMISC2_CDR_BW); 79 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH, 80 L2CB1_PCIE_PHYMISC2_L0S_TH); 81 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data); 82 /* extend L1 sync timer */ 83 AT_READ_REG(hw, REG_LINK_CTRL, &data); 84 data |= LINK_CTRL_EXT_SYNC; 85 AT_WRITE_REG(hw, REG_LINK_CTRL, data); 86 } 87 /* l2cb 1.x & l1d 1.x */ 88 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) { 89 AT_READ_REG(hw, REG_PM_CTRL, &data); 90 data |= PM_CTRL_L0S_BUFSRX_EN; 91 AT_WRITE_REG(hw, REG_PM_CTRL, data); 92 /* clear vendor msg */ 93 AT_READ_REG(hw, REG_DMA_DBG, &data); 94 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG); 95 } 96 } 97 98 /* FIXME: no need any more ? */ 99 /* 100 * atl1c_init_pcie - init PCIE module 101 */ 102 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) 103 { 104 u32 data; 105 u32 pci_cmd; 106 struct pci_dev *pdev = hw->adapter->pdev; 107 int pos; 108 109 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd); 110 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 111 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 112 PCI_COMMAND_IO); 113 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd); 114 115 /* 116 * Clear any PowerSaveing Settings 117 */ 118 pci_enable_wake(pdev, PCI_D3hot, 0); 119 pci_enable_wake(pdev, PCI_D3cold, 0); 120 /* wol sts read-clear */ 121 AT_READ_REG(hw, REG_WOL_CTRL, &data); 122 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 123 124 /* 125 * Mask some pcie error bits 126 */ 127 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 128 if (pos) { 129 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); 130 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); 131 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); 132 } 133 /* clear error status */ 134 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, 135 PCI_EXP_DEVSTA_NFED | 136 PCI_EXP_DEVSTA_FED | 137 PCI_EXP_DEVSTA_CED | 138 PCI_EXP_DEVSTA_URD); 139 140 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data); 141 data &= ~LTSSM_ID_EN_WRO; 142 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data); 143 144 atl1c_pcie_patch(hw); 145 if (flag & ATL1C_PCIE_L0S_L1_DISABLE) 146 atl1c_disable_l0s_l1(hw); 147 148 msleep(5); 149 } 150 151 /** 152 * atl1c_irq_enable - Enable default interrupt generation settings 153 * @adapter: board private structure 154 */ 155 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter) 156 { 157 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 158 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF); 159 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 160 AT_WRITE_FLUSH(&adapter->hw); 161 } 162 } 163 164 /** 165 * atl1c_irq_disable - Mask off interrupt generation on the NIC 166 * @adapter: board private structure 167 */ 168 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter) 169 { 170 atomic_inc(&adapter->irq_sem); 171 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 172 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT); 173 AT_WRITE_FLUSH(&adapter->hw); 174 synchronize_irq(adapter->pdev->irq); 175 } 176 177 /** 178 * atl1c_irq_reset - reset interrupt confiure on the NIC 179 * @adapter: board private structure 180 */ 181 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter) 182 { 183 atomic_set(&adapter->irq_sem, 1); 184 atl1c_irq_enable(adapter); 185 } 186 187 /* 188 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 189 * of the idle status register until the device is actually idle 190 */ 191 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 192 { 193 int timeout; 194 u32 data; 195 196 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 197 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 198 if ((data & modu_ctrl) == 0) 199 return 0; 200 msleep(1); 201 } 202 return data; 203 } 204 205 /** 206 * atl1c_phy_config - Timer Call-back 207 * @t: timer list containing pointer to netdev cast into an unsigned long 208 */ 209 static void atl1c_phy_config(struct timer_list *t) 210 { 211 struct atl1c_adapter *adapter = from_timer(adapter, t, 212 phy_config_timer); 213 struct atl1c_hw *hw = &adapter->hw; 214 unsigned long flags; 215 216 spin_lock_irqsave(&adapter->mdio_lock, flags); 217 atl1c_restart_autoneg(hw); 218 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 219 } 220 221 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 222 { 223 atl1c_down(adapter); 224 atl1c_up(adapter); 225 clear_bit(__AT_RESETTING, &adapter->flags); 226 } 227 228 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 229 { 230 struct atl1c_hw *hw = &adapter->hw; 231 struct net_device *netdev = adapter->netdev; 232 struct pci_dev *pdev = adapter->pdev; 233 int err; 234 unsigned long flags; 235 u16 speed, duplex, phy_data; 236 237 spin_lock_irqsave(&adapter->mdio_lock, flags); 238 /* MII_BMSR must read twise */ 239 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 240 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 241 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 242 243 if ((phy_data & BMSR_LSTATUS) == 0) { 244 /* link down */ 245 netif_carrier_off(netdev); 246 hw->hibernate = true; 247 if (atl1c_reset_mac(hw) != 0) 248 if (netif_msg_hw(adapter)) 249 dev_warn(&pdev->dev, "reset mac failed\n"); 250 atl1c_set_aspm(hw, SPEED_0); 251 atl1c_post_phy_linkchg(hw, SPEED_0); 252 atl1c_reset_dma_ring(adapter); 253 atl1c_configure(adapter); 254 } else { 255 /* Link Up */ 256 hw->hibernate = false; 257 spin_lock_irqsave(&adapter->mdio_lock, flags); 258 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 259 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 260 if (unlikely(err)) 261 return; 262 /* link result is our setting */ 263 if (adapter->link_speed != speed || 264 adapter->link_duplex != duplex) { 265 adapter->link_speed = speed; 266 adapter->link_duplex = duplex; 267 atl1c_set_aspm(hw, speed); 268 atl1c_post_phy_linkchg(hw, speed); 269 atl1c_start_mac(adapter); 270 if (netif_msg_link(adapter)) 271 dev_info(&pdev->dev, 272 "%s: %s NIC Link is Up<%d Mbps %s>\n", 273 atl1c_driver_name, netdev->name, 274 adapter->link_speed, 275 adapter->link_duplex == FULL_DUPLEX ? 276 "Full Duplex" : "Half Duplex"); 277 } 278 if (!netif_carrier_ok(netdev)) 279 netif_carrier_on(netdev); 280 } 281 } 282 283 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 284 { 285 struct net_device *netdev = adapter->netdev; 286 struct pci_dev *pdev = adapter->pdev; 287 u16 phy_data; 288 u16 link_up; 289 290 spin_lock(&adapter->mdio_lock); 291 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 292 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 293 spin_unlock(&adapter->mdio_lock); 294 link_up = phy_data & BMSR_LSTATUS; 295 /* notify upper layer link down ASAP */ 296 if (!link_up) { 297 if (netif_carrier_ok(netdev)) { 298 /* old link state: Up */ 299 netif_carrier_off(netdev); 300 if (netif_msg_link(adapter)) 301 dev_info(&pdev->dev, 302 "%s: %s NIC Link is Down\n", 303 atl1c_driver_name, netdev->name); 304 adapter->link_speed = SPEED_0; 305 } 306 } 307 308 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 309 schedule_work(&adapter->common_task); 310 } 311 312 static void atl1c_common_task(struct work_struct *work) 313 { 314 struct atl1c_adapter *adapter; 315 struct net_device *netdev; 316 317 adapter = container_of(work, struct atl1c_adapter, common_task); 318 netdev = adapter->netdev; 319 320 if (test_bit(__AT_DOWN, &adapter->flags)) 321 return; 322 323 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 324 netif_device_detach(netdev); 325 atl1c_down(adapter); 326 atl1c_up(adapter); 327 netif_device_attach(netdev); 328 } 329 330 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 331 &adapter->work_event)) { 332 atl1c_irq_disable(adapter); 333 atl1c_check_link_status(adapter); 334 atl1c_irq_enable(adapter); 335 } 336 } 337 338 339 static void atl1c_del_timer(struct atl1c_adapter *adapter) 340 { 341 del_timer_sync(&adapter->phy_config_timer); 342 } 343 344 345 /** 346 * atl1c_tx_timeout - Respond to a Tx Hang 347 * @netdev: network interface device structure 348 * @txqueue: index of hanging tx queue 349 */ 350 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue) 351 { 352 struct atl1c_adapter *adapter = netdev_priv(netdev); 353 354 /* Do the reset outside of interrupt context */ 355 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 356 schedule_work(&adapter->common_task); 357 } 358 359 /** 360 * atl1c_set_multi - Multicast and Promiscuous mode set 361 * @netdev: network interface device structure 362 * 363 * The set_multi entry point is called whenever the multicast address 364 * list or the network interface flags are updated. This routine is 365 * responsible for configuring the hardware for proper multicast, 366 * promiscuous mode, and all-multi behavior. 367 */ 368 static void atl1c_set_multi(struct net_device *netdev) 369 { 370 struct atl1c_adapter *adapter = netdev_priv(netdev); 371 struct atl1c_hw *hw = &adapter->hw; 372 struct netdev_hw_addr *ha; 373 u32 mac_ctrl_data; 374 u32 hash_value; 375 376 /* Check for Promiscuous and All Multicast modes */ 377 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 378 379 if (netdev->flags & IFF_PROMISC) { 380 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 381 } else if (netdev->flags & IFF_ALLMULTI) { 382 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 383 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 384 } else { 385 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 386 } 387 388 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 389 390 /* clear the old settings from the multicast hash table */ 391 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 392 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 393 394 /* comoute mc addresses' hash value ,and put it into hash table */ 395 netdev_for_each_mc_addr(ha, netdev) { 396 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 397 atl1c_hash_set(hw, hash_value); 398 } 399 } 400 401 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 402 { 403 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 404 /* enable VLAN tag insert/strip */ 405 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 406 } else { 407 /* disable VLAN tag insert/strip */ 408 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 409 } 410 } 411 412 static void atl1c_vlan_mode(struct net_device *netdev, 413 netdev_features_t features) 414 { 415 struct atl1c_adapter *adapter = netdev_priv(netdev); 416 struct pci_dev *pdev = adapter->pdev; 417 u32 mac_ctrl_data = 0; 418 419 if (netif_msg_pktdata(adapter)) 420 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 421 422 atl1c_irq_disable(adapter); 423 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 424 __atl1c_vlan_mode(features, &mac_ctrl_data); 425 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 426 atl1c_irq_enable(adapter); 427 } 428 429 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 430 { 431 struct pci_dev *pdev = adapter->pdev; 432 433 if (netif_msg_pktdata(adapter)) 434 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 435 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 436 } 437 438 /** 439 * atl1c_set_mac - Change the Ethernet Address of the NIC 440 * @netdev: network interface device structure 441 * @p: pointer to an address structure 442 * 443 * Returns 0 on success, negative on failure 444 */ 445 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 446 { 447 struct atl1c_adapter *adapter = netdev_priv(netdev); 448 struct sockaddr *addr = p; 449 450 if (!is_valid_ether_addr(addr->sa_data)) 451 return -EADDRNOTAVAIL; 452 453 if (netif_running(netdev)) 454 return -EBUSY; 455 456 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 457 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 458 459 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 460 461 return 0; 462 } 463 464 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 465 struct net_device *dev) 466 { 467 unsigned int head_size; 468 int mtu = dev->mtu; 469 470 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 471 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 472 473 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD + NET_IP_ALIGN) + 474 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 475 adapter->rx_frag_size = roundup_pow_of_two(head_size); 476 } 477 478 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 479 netdev_features_t features) 480 { 481 /* 482 * Since there is no support for separate rx/tx vlan accel 483 * enable/disable make sure tx flag is always in same state as rx. 484 */ 485 if (features & NETIF_F_HW_VLAN_CTAG_RX) 486 features |= NETIF_F_HW_VLAN_CTAG_TX; 487 else 488 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 489 490 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 491 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 492 493 return features; 494 } 495 496 static int atl1c_set_features(struct net_device *netdev, 497 netdev_features_t features) 498 { 499 netdev_features_t changed = netdev->features ^ features; 500 501 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 502 atl1c_vlan_mode(netdev, features); 503 504 return 0; 505 } 506 507 static void atl1c_set_max_mtu(struct net_device *netdev) 508 { 509 struct atl1c_adapter *adapter = netdev_priv(netdev); 510 struct atl1c_hw *hw = &adapter->hw; 511 512 switch (hw->nic_type) { 513 /* These (GbE) devices support jumbo packets, max_mtu 6122 */ 514 case athr_l1c: 515 case athr_l1d: 516 case athr_l1d_2: 517 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - 518 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 519 break; 520 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */ 521 default: 522 netdev->max_mtu = ETH_DATA_LEN; 523 break; 524 } 525 } 526 527 /** 528 * atl1c_change_mtu - Change the Maximum Transfer Unit 529 * @netdev: network interface device structure 530 * @new_mtu: new value for maximum frame size 531 * 532 * Returns 0 on success, negative on failure 533 */ 534 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 535 { 536 struct atl1c_adapter *adapter = netdev_priv(netdev); 537 538 /* set MTU */ 539 if (netif_running(netdev)) { 540 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 541 msleep(1); 542 netdev->mtu = new_mtu; 543 adapter->hw.max_frame_size = new_mtu; 544 atl1c_set_rxbufsize(adapter, netdev); 545 atl1c_down(adapter); 546 netdev_update_features(netdev); 547 atl1c_up(adapter); 548 clear_bit(__AT_RESETTING, &adapter->flags); 549 } 550 return 0; 551 } 552 553 /* 554 * caller should hold mdio_lock 555 */ 556 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 557 { 558 struct atl1c_adapter *adapter = netdev_priv(netdev); 559 u16 result; 560 561 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 562 return result; 563 } 564 565 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 566 int reg_num, int val) 567 { 568 struct atl1c_adapter *adapter = netdev_priv(netdev); 569 570 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 571 } 572 573 static int atl1c_mii_ioctl(struct net_device *netdev, 574 struct ifreq *ifr, int cmd) 575 { 576 struct atl1c_adapter *adapter = netdev_priv(netdev); 577 struct pci_dev *pdev = adapter->pdev; 578 struct mii_ioctl_data *data = if_mii(ifr); 579 unsigned long flags; 580 int retval = 0; 581 582 if (!netif_running(netdev)) 583 return -EINVAL; 584 585 spin_lock_irqsave(&adapter->mdio_lock, flags); 586 switch (cmd) { 587 case SIOCGMIIPHY: 588 data->phy_id = 0; 589 break; 590 591 case SIOCGMIIREG: 592 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 593 &data->val_out)) { 594 retval = -EIO; 595 goto out; 596 } 597 break; 598 599 case SIOCSMIIREG: 600 if (data->reg_num & ~(0x1F)) { 601 retval = -EFAULT; 602 goto out; 603 } 604 605 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 606 data->reg_num, data->val_in); 607 if (atl1c_write_phy_reg(&adapter->hw, 608 data->reg_num, data->val_in)) { 609 retval = -EIO; 610 goto out; 611 } 612 break; 613 614 default: 615 retval = -EOPNOTSUPP; 616 break; 617 } 618 out: 619 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 620 return retval; 621 } 622 623 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 624 { 625 switch (cmd) { 626 case SIOCGMIIPHY: 627 case SIOCGMIIREG: 628 case SIOCSMIIREG: 629 return atl1c_mii_ioctl(netdev, ifr, cmd); 630 default: 631 return -EOPNOTSUPP; 632 } 633 } 634 635 /** 636 * atl1c_alloc_queues - Allocate memory for all rings 637 * @adapter: board private structure to initialize 638 * 639 */ 640 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 641 { 642 return 0; 643 } 644 645 static void atl1c_set_mac_type(struct atl1c_hw *hw) 646 { 647 switch (hw->device_id) { 648 case PCI_DEVICE_ID_ATTANSIC_L2C: 649 hw->nic_type = athr_l2c; 650 break; 651 case PCI_DEVICE_ID_ATTANSIC_L1C: 652 hw->nic_type = athr_l1c; 653 break; 654 case PCI_DEVICE_ID_ATHEROS_L2C_B: 655 hw->nic_type = athr_l2c_b; 656 break; 657 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 658 hw->nic_type = athr_l2c_b2; 659 break; 660 case PCI_DEVICE_ID_ATHEROS_L1D: 661 hw->nic_type = athr_l1d; 662 break; 663 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 664 hw->nic_type = athr_l1d_2; 665 break; 666 default: 667 break; 668 } 669 } 670 671 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 672 { 673 u32 link_ctrl_data; 674 675 atl1c_set_mac_type(hw); 676 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 677 678 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 679 ATL1C_TXQ_MODE_ENHANCE; 680 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 681 ATL1C_ASPM_L1_SUPPORT; 682 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 683 684 if (hw->nic_type == athr_l1c || 685 hw->nic_type == athr_l1d || 686 hw->nic_type == athr_l1d_2) 687 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 688 return 0; 689 } 690 691 struct atl1c_platform_patch { 692 u16 pci_did; 693 u8 pci_revid; 694 u16 subsystem_vid; 695 u16 subsystem_did; 696 u32 patch_flag; 697 #define ATL1C_LINK_PATCH 0x1 698 }; 699 static const struct atl1c_platform_patch plats[] = { 700 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 701 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 702 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 703 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 704 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 705 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 706 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 707 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 708 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 709 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 710 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 711 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 712 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 713 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 714 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 715 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 716 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 717 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 718 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 719 {0}, 720 }; 721 722 static void atl1c_patch_assign(struct atl1c_hw *hw) 723 { 724 struct pci_dev *pdev = hw->adapter->pdev; 725 u32 misc_ctrl; 726 int i = 0; 727 728 hw->msi_lnkpatch = false; 729 730 while (plats[i].pci_did != 0) { 731 if (plats[i].pci_did == hw->device_id && 732 plats[i].pci_revid == hw->revision_id && 733 plats[i].subsystem_vid == hw->subsystem_vendor_id && 734 plats[i].subsystem_did == hw->subsystem_id) { 735 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 736 hw->msi_lnkpatch = true; 737 } 738 i++; 739 } 740 741 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 742 hw->revision_id == L2CB_V21) { 743 /* config access mode */ 744 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 745 REG_PCIE_DEV_MISC_CTRL); 746 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 747 misc_ctrl &= ~0x100; 748 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 749 REG_PCIE_DEV_MISC_CTRL); 750 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 751 } 752 } 753 /** 754 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 755 * @adapter: board private structure to initialize 756 * 757 * atl1c_sw_init initializes the Adapter private data structure. 758 * Fields are initialized based on PCI device information and 759 * OS network device settings (MTU size). 760 */ 761 static int atl1c_sw_init(struct atl1c_adapter *adapter) 762 { 763 struct atl1c_hw *hw = &adapter->hw; 764 struct pci_dev *pdev = adapter->pdev; 765 u32 revision; 766 767 768 adapter->wol = 0; 769 device_set_wakeup_enable(&pdev->dev, false); 770 adapter->link_speed = SPEED_0; 771 adapter->link_duplex = FULL_DUPLEX; 772 adapter->tpd_ring[0].count = 1024; 773 adapter->rfd_ring.count = 512; 774 775 hw->vendor_id = pdev->vendor; 776 hw->device_id = pdev->device; 777 hw->subsystem_vendor_id = pdev->subsystem_vendor; 778 hw->subsystem_id = pdev->subsystem_device; 779 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 780 hw->revision_id = revision & 0xFF; 781 /* before link up, we assume hibernate is true */ 782 hw->hibernate = true; 783 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 784 if (atl1c_setup_mac_funcs(hw) != 0) { 785 dev_err(&pdev->dev, "set mac function pointers failed\n"); 786 return -1; 787 } 788 atl1c_patch_assign(hw); 789 790 hw->intr_mask = IMR_NORMAL_MASK; 791 hw->phy_configured = false; 792 hw->preamble_len = 7; 793 hw->max_frame_size = adapter->netdev->mtu; 794 hw->autoneg_advertised = ADVERTISED_Autoneg; 795 hw->indirect_tab = 0xE4E4E4E4; 796 hw->base_cpu = 0; 797 798 hw->ict = 50000; /* 100ms */ 799 hw->smb_timer = 200000; /* 400ms */ 800 hw->rx_imt = 200; 801 hw->tx_imt = 1000; 802 803 hw->tpd_burst = 5; 804 hw->rfd_burst = 8; 805 hw->dma_order = atl1c_dma_ord_out; 806 hw->dmar_block = atl1c_dma_req_1024; 807 808 if (atl1c_alloc_queues(adapter)) { 809 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 810 return -ENOMEM; 811 } 812 /* TODO */ 813 atl1c_set_rxbufsize(adapter, adapter->netdev); 814 atomic_set(&adapter->irq_sem, 1); 815 spin_lock_init(&adapter->mdio_lock); 816 spin_lock_init(&adapter->hw.intr_mask_lock); 817 set_bit(__AT_DOWN, &adapter->flags); 818 819 return 0; 820 } 821 822 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 823 struct atl1c_buffer *buffer_info) 824 { 825 u16 pci_driection; 826 if (buffer_info->flags & ATL1C_BUFFER_FREE) 827 return; 828 if (buffer_info->dma) { 829 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 830 pci_driection = DMA_FROM_DEVICE; 831 else 832 pci_driection = DMA_TO_DEVICE; 833 834 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 835 dma_unmap_single(&pdev->dev, buffer_info->dma, 836 buffer_info->length, pci_driection); 837 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 838 dma_unmap_page(&pdev->dev, buffer_info->dma, 839 buffer_info->length, pci_driection); 840 } 841 if (buffer_info->skb) 842 dev_consume_skb_any(buffer_info->skb); 843 buffer_info->dma = 0; 844 buffer_info->skb = NULL; 845 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 846 } 847 /** 848 * atl1c_clean_tx_ring - Free Tx-skb 849 * @adapter: board private structure 850 * @type: type of transmit queue 851 */ 852 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 853 enum atl1c_trans_queue type) 854 { 855 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 856 struct atl1c_buffer *buffer_info; 857 struct pci_dev *pdev = adapter->pdev; 858 u16 index, ring_count; 859 860 ring_count = tpd_ring->count; 861 for (index = 0; index < ring_count; index++) { 862 buffer_info = &tpd_ring->buffer_info[index]; 863 atl1c_clean_buffer(pdev, buffer_info); 864 } 865 866 netdev_reset_queue(adapter->netdev); 867 868 /* Zero out Tx-buffers */ 869 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 870 ring_count); 871 atomic_set(&tpd_ring->next_to_clean, 0); 872 tpd_ring->next_to_use = 0; 873 } 874 875 /** 876 * atl1c_clean_rx_ring - Free rx-reservation skbs 877 * @adapter: board private structure 878 */ 879 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 880 { 881 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 882 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 883 struct atl1c_buffer *buffer_info; 884 struct pci_dev *pdev = adapter->pdev; 885 int j; 886 887 for (j = 0; j < rfd_ring->count; j++) { 888 buffer_info = &rfd_ring->buffer_info[j]; 889 atl1c_clean_buffer(pdev, buffer_info); 890 } 891 /* zero out the descriptor ring */ 892 memset(rfd_ring->desc, 0, rfd_ring->size); 893 rfd_ring->next_to_clean = 0; 894 rfd_ring->next_to_use = 0; 895 rrd_ring->next_to_use = 0; 896 rrd_ring->next_to_clean = 0; 897 } 898 899 /* 900 * Read / Write Ptr Initialize: 901 */ 902 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 903 { 904 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 905 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 906 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 907 struct atl1c_buffer *buffer_info; 908 int i, j; 909 910 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 911 tpd_ring[i].next_to_use = 0; 912 atomic_set(&tpd_ring[i].next_to_clean, 0); 913 buffer_info = tpd_ring[i].buffer_info; 914 for (j = 0; j < tpd_ring->count; j++) 915 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 916 ATL1C_BUFFER_FREE); 917 } 918 rfd_ring->next_to_use = 0; 919 rfd_ring->next_to_clean = 0; 920 rrd_ring->next_to_use = 0; 921 rrd_ring->next_to_clean = 0; 922 for (j = 0; j < rfd_ring->count; j++) { 923 buffer_info = &rfd_ring->buffer_info[j]; 924 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 925 } 926 } 927 928 /** 929 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 930 * @adapter: board private structure 931 * 932 * Free all transmit software resources 933 */ 934 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 935 { 936 struct pci_dev *pdev = adapter->pdev; 937 938 dma_free_coherent(&pdev->dev, adapter->ring_header.size, 939 adapter->ring_header.desc, adapter->ring_header.dma); 940 adapter->ring_header.desc = NULL; 941 942 /* Note: just free tdp_ring.buffer_info, 943 * it contain rfd_ring.buffer_info, do not double free */ 944 if (adapter->tpd_ring[0].buffer_info) { 945 kfree(adapter->tpd_ring[0].buffer_info); 946 adapter->tpd_ring[0].buffer_info = NULL; 947 } 948 if (adapter->rx_page) { 949 put_page(adapter->rx_page); 950 adapter->rx_page = NULL; 951 } 952 } 953 954 /** 955 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources 956 * @adapter: board private structure 957 * 958 * Return 0 on success, negative on failure 959 */ 960 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 961 { 962 struct pci_dev *pdev = adapter->pdev; 963 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 964 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 965 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 966 struct atl1c_ring_header *ring_header = &adapter->ring_header; 967 int size; 968 int i; 969 int count = 0; 970 int rx_desc_count = 0; 971 u32 offset = 0; 972 973 rrd_ring->count = rfd_ring->count; 974 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 975 tpd_ring[i].count = tpd_ring[0].count; 976 977 /* 2 tpd queue, one high priority queue, 978 * another normal priority queue */ 979 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 980 rfd_ring->count); 981 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 982 if (unlikely(!tpd_ring->buffer_info)) 983 goto err_nomem; 984 985 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 986 tpd_ring[i].buffer_info = 987 (tpd_ring->buffer_info + count); 988 count += tpd_ring[i].count; 989 } 990 991 rfd_ring->buffer_info = 992 (tpd_ring->buffer_info + count); 993 count += rfd_ring->count; 994 rx_desc_count += rfd_ring->count; 995 996 /* 997 * real ring DMA buffer 998 * each ring/block may need up to 8 bytes for alignment, hence the 999 * additional bytes tacked onto the end. 1000 */ 1001 ring_header->size = size = 1002 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1003 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1004 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1005 8 * 4; 1006 1007 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, 1008 &ring_header->dma, GFP_KERNEL); 1009 if (unlikely(!ring_header->desc)) { 1010 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1011 goto err_nomem; 1012 } 1013 /* init TPD ring */ 1014 1015 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1016 offset = tpd_ring[0].dma - ring_header->dma; 1017 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1018 tpd_ring[i].dma = ring_header->dma + offset; 1019 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1020 tpd_ring[i].size = 1021 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1022 offset += roundup(tpd_ring[i].size, 8); 1023 } 1024 /* init RFD ring */ 1025 rfd_ring->dma = ring_header->dma + offset; 1026 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1027 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1028 offset += roundup(rfd_ring->size, 8); 1029 1030 /* init RRD ring */ 1031 rrd_ring->dma = ring_header->dma + offset; 1032 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1033 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1034 rrd_ring->count; 1035 offset += roundup(rrd_ring->size, 8); 1036 1037 return 0; 1038 1039 err_nomem: 1040 kfree(tpd_ring->buffer_info); 1041 return -ENOMEM; 1042 } 1043 1044 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1045 { 1046 struct atl1c_hw *hw = &adapter->hw; 1047 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1048 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1049 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1050 adapter->tpd_ring; 1051 1052 /* TPD */ 1053 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1054 (u32)((tpd_ring[atl1c_trans_normal].dma & 1055 AT_DMA_HI_ADDR_MASK) >> 32)); 1056 /* just enable normal priority TX queue */ 1057 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1058 (u32)(tpd_ring[atl1c_trans_normal].dma & 1059 AT_DMA_LO_ADDR_MASK)); 1060 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1061 (u32)(tpd_ring[atl1c_trans_high].dma & 1062 AT_DMA_LO_ADDR_MASK)); 1063 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1064 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1065 1066 1067 /* RFD */ 1068 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1069 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1070 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1071 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1072 1073 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1074 rfd_ring->count & RFD_RING_SIZE_MASK); 1075 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1076 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1077 1078 /* RRD */ 1079 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1080 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1081 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1082 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1083 1084 if (hw->nic_type == athr_l2c_b) { 1085 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1086 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1087 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1088 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1089 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1090 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1091 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1092 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1093 } 1094 /* Load all of base address above */ 1095 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1096 } 1097 1098 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1099 { 1100 struct atl1c_hw *hw = &adapter->hw; 1101 int max_pay_load; 1102 u16 tx_offload_thresh; 1103 u32 txq_ctrl_data; 1104 1105 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1106 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1107 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1108 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1109 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1110 /* 1111 * if BIOS had changed the dam-read-max-length to an invalid value, 1112 * restore it to default value 1113 */ 1114 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1115 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1116 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1117 } 1118 txq_ctrl_data = 1119 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1120 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1121 1122 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1123 } 1124 1125 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1126 { 1127 struct atl1c_hw *hw = &adapter->hw; 1128 u32 rxq_ctrl_data; 1129 1130 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1131 RXQ_RFD_BURST_NUM_SHIFT; 1132 1133 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1134 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1135 1136 /* aspm for gigabit */ 1137 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1138 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1139 ASPM_THRUPUT_LIMIT_100M); 1140 1141 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1142 } 1143 1144 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1145 { 1146 struct atl1c_hw *hw = &adapter->hw; 1147 u32 dma_ctrl_data; 1148 1149 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1150 DMA_CTRL_RREQ_PRI_DATA | 1151 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1152 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1153 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1154 1155 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1156 } 1157 1158 /* 1159 * Stop the mac, transmit and receive units 1160 * hw - Struct containing variables accessed by shared code 1161 * return : 0 or idle status (if error) 1162 */ 1163 static int atl1c_stop_mac(struct atl1c_hw *hw) 1164 { 1165 u32 data; 1166 1167 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1168 data &= ~RXQ_CTRL_EN; 1169 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1170 1171 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1172 data &= ~TXQ_CTRL_EN; 1173 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1174 1175 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1176 1177 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1178 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1179 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1180 1181 return (int)atl1c_wait_until_idle(hw, 1182 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1183 } 1184 1185 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1186 { 1187 struct atl1c_hw *hw = &adapter->hw; 1188 u32 mac, txq, rxq; 1189 1190 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX; 1191 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1192 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1193 1194 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1195 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1196 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1197 1198 txq |= TXQ_CTRL_EN; 1199 rxq |= RXQ_CTRL_EN; 1200 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1201 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1202 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1203 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1204 MAC_CTRL_HASH_ALG_CRC32; 1205 if (hw->mac_duplex) 1206 mac |= MAC_CTRL_DUPLX; 1207 else 1208 mac &= ~MAC_CTRL_DUPLX; 1209 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1210 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1211 1212 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1213 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1214 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1215 } 1216 1217 /* 1218 * Reset the transmit and receive units; mask and clear all interrupts. 1219 * hw - Struct containing variables accessed by shared code 1220 * return : 0 or idle status (if error) 1221 */ 1222 static int atl1c_reset_mac(struct atl1c_hw *hw) 1223 { 1224 struct atl1c_adapter *adapter = hw->adapter; 1225 struct pci_dev *pdev = adapter->pdev; 1226 u32 ctrl_data = 0; 1227 1228 atl1c_stop_mac(hw); 1229 /* 1230 * Issue Soft Reset to the MAC. This will reset the chip's 1231 * transmit, receive, DMA. It will not effect 1232 * the current PCI configuration. The global reset bit is self- 1233 * clearing, and should clear within a microsecond. 1234 */ 1235 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1236 ctrl_data |= MASTER_CTRL_OOB_DIS; 1237 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1238 1239 AT_WRITE_FLUSH(hw); 1240 msleep(10); 1241 /* Wait at least 10ms for All module to be Idle */ 1242 1243 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1244 dev_err(&pdev->dev, 1245 "MAC state machine can't be idle since" 1246 " disabled for 10ms second\n"); 1247 return -1; 1248 } 1249 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1250 1251 /* driver control speed/duplex */ 1252 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1253 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1254 1255 /* clk switch setting */ 1256 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1257 switch (hw->nic_type) { 1258 case athr_l2c_b: 1259 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1260 SERDES_MAC_CLK_SLOWDOWN); 1261 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1262 break; 1263 case athr_l2c_b2: 1264 case athr_l1d_2: 1265 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1266 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1267 break; 1268 default: 1269 break; 1270 } 1271 1272 return 0; 1273 } 1274 1275 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1276 { 1277 u16 ctrl_flags = hw->ctrl_flags; 1278 1279 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1280 atl1c_set_aspm(hw, SPEED_0); 1281 hw->ctrl_flags = ctrl_flags; 1282 } 1283 1284 /* 1285 * Set ASPM state. 1286 * Enable/disable L0s/L1 depend on link state. 1287 */ 1288 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1289 { 1290 u32 pm_ctrl_data; 1291 u32 link_l1_timer; 1292 1293 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1294 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1295 PM_CTRL_ASPM_L0S_EN | 1296 PM_CTRL_MAC_ASPM_CHK); 1297 /* L1 timer */ 1298 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1299 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1300 link_l1_timer = 1301 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1302 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1303 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1304 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1305 } else { 1306 link_l1_timer = hw->nic_type == athr_l2c_b ? 1307 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1308 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1309 link_l1_timer = 1; 1310 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1311 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1312 } 1313 1314 /* L0S/L1 enable */ 1315 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1316 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1317 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1318 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1319 1320 /* l2cb & l1d & l2cb2 & l1d2 */ 1321 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1322 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1323 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1324 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1325 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1326 PM_CTRL_SERDES_PD_EX_L1 | 1327 PM_CTRL_CLK_SWH_L1; 1328 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1329 PM_CTRL_SERDES_PLL_L1_EN | 1330 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1331 PM_CTRL_SA_DLY_EN | 1332 PM_CTRL_HOTRST); 1333 /* disable l0s if link down or l2cb */ 1334 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1335 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1336 } else { /* l1c */ 1337 pm_ctrl_data = 1338 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1339 if (link_speed != SPEED_0) { 1340 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1341 PM_CTRL_SERDES_PLL_L1_EN | 1342 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1343 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1344 PM_CTRL_CLK_SWH_L1 | 1345 PM_CTRL_ASPM_L0S_EN | 1346 PM_CTRL_ASPM_L1_EN); 1347 } else { /* link down */ 1348 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1349 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1350 PM_CTRL_SERDES_PLL_L1_EN | 1351 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1352 PM_CTRL_ASPM_L0S_EN); 1353 } 1354 } 1355 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1356 1357 return; 1358 } 1359 1360 /** 1361 * atl1c_configure - Configure Transmit&Receive Unit after Reset 1362 * @adapter: board private structure 1363 * 1364 * Configure the Tx /Rx unit of the MAC after a reset. 1365 */ 1366 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1367 { 1368 struct atl1c_hw *hw = &adapter->hw; 1369 u32 master_ctrl_data = 0; 1370 u32 intr_modrt_data; 1371 u32 data; 1372 1373 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1374 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1375 MASTER_CTRL_RX_ITIMER_EN | 1376 MASTER_CTRL_INT_RDCLR); 1377 /* clear interrupt status */ 1378 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1379 /* Clear any WOL status */ 1380 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1381 /* set Interrupt Clear Timer 1382 * HW will enable self to assert interrupt event to system after 1383 * waiting x-time for software to notify it accept interrupt. 1384 */ 1385 1386 data = CLK_GATING_EN_ALL; 1387 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1388 if (hw->nic_type == athr_l2c_b) 1389 data &= ~CLK_GATING_RXMAC_EN; 1390 } else 1391 data = 0; 1392 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1393 1394 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1395 hw->ict & INT_RETRIG_TIMER_MASK); 1396 1397 atl1c_configure_des_ring(adapter); 1398 1399 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1400 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1401 IRQ_MODRT_TX_TIMER_SHIFT; 1402 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1403 IRQ_MODRT_RX_TIMER_SHIFT; 1404 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1405 master_ctrl_data |= 1406 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1407 } 1408 1409 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1410 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1411 1412 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1413 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1414 1415 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1416 hw->smb_timer & SMB_STAT_TIMER_MASK); 1417 1418 /* set MTU */ 1419 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1420 VLAN_HLEN + ETH_FCS_LEN); 1421 1422 atl1c_configure_tx(adapter); 1423 atl1c_configure_rx(adapter); 1424 atl1c_configure_dma(adapter); 1425 1426 return 0; 1427 } 1428 1429 static int atl1c_configure(struct atl1c_adapter *adapter) 1430 { 1431 struct net_device *netdev = adapter->netdev; 1432 int num; 1433 1434 atl1c_init_ring_ptrs(adapter); 1435 atl1c_set_multi(netdev); 1436 atl1c_restore_vlan(adapter); 1437 1438 num = atl1c_alloc_rx_buffer(adapter, false); 1439 if (unlikely(num == 0)) 1440 return -ENOMEM; 1441 1442 if (atl1c_configure_mac(adapter)) 1443 return -EIO; 1444 1445 return 0; 1446 } 1447 1448 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1449 { 1450 u16 hw_reg_addr = 0; 1451 unsigned long *stats_item = NULL; 1452 u32 data; 1453 1454 /* update rx status */ 1455 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1456 stats_item = &adapter->hw_stats.rx_ok; 1457 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1458 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1459 *stats_item += data; 1460 stats_item++; 1461 hw_reg_addr += 4; 1462 } 1463 /* update tx status */ 1464 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1465 stats_item = &adapter->hw_stats.tx_ok; 1466 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1467 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1468 *stats_item += data; 1469 stats_item++; 1470 hw_reg_addr += 4; 1471 } 1472 } 1473 1474 /** 1475 * atl1c_get_stats - Get System Network Statistics 1476 * @netdev: network interface device structure 1477 * 1478 * Returns the address of the device statistics structure. 1479 * The statistics are actually updated from the timer callback. 1480 */ 1481 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1482 { 1483 struct atl1c_adapter *adapter = netdev_priv(netdev); 1484 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1485 struct net_device_stats *net_stats = &netdev->stats; 1486 1487 atl1c_update_hw_stats(adapter); 1488 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1489 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1490 net_stats->multicast = hw_stats->rx_mcast; 1491 net_stats->collisions = hw_stats->tx_1_col + 1492 hw_stats->tx_2_col + 1493 hw_stats->tx_late_col + 1494 hw_stats->tx_abort_col; 1495 1496 net_stats->rx_errors = hw_stats->rx_frag + 1497 hw_stats->rx_fcs_err + 1498 hw_stats->rx_len_err + 1499 hw_stats->rx_sz_ov + 1500 hw_stats->rx_rrd_ov + 1501 hw_stats->rx_align_err + 1502 hw_stats->rx_rxf_ov; 1503 1504 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1505 net_stats->rx_length_errors = hw_stats->rx_len_err; 1506 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1507 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1508 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1509 1510 net_stats->tx_errors = hw_stats->tx_late_col + 1511 hw_stats->tx_abort_col + 1512 hw_stats->tx_underrun + 1513 hw_stats->tx_trunc; 1514 1515 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1516 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1517 net_stats->tx_window_errors = hw_stats->tx_late_col; 1518 1519 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1520 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1521 1522 return net_stats; 1523 } 1524 1525 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1526 { 1527 u16 phy_data; 1528 1529 spin_lock(&adapter->mdio_lock); 1530 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1531 spin_unlock(&adapter->mdio_lock); 1532 } 1533 1534 static int atl1c_clean_tx(struct napi_struct *napi, int budget) 1535 { 1536 struct atl1c_adapter *adapter = 1537 container_of(napi, struct atl1c_adapter, tx_napi); 1538 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[atl1c_trans_normal]; 1539 struct atl1c_buffer *buffer_info; 1540 struct pci_dev *pdev = adapter->pdev; 1541 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1542 u16 hw_next_to_clean; 1543 unsigned int total_bytes = 0, total_packets = 0; 1544 unsigned long flags; 1545 1546 AT_READ_REGW(&adapter->hw, REG_TPD_PRI0_CIDX, &hw_next_to_clean); 1547 1548 while (next_to_clean != hw_next_to_clean) { 1549 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1550 if (buffer_info->skb) { 1551 total_bytes += buffer_info->skb->len; 1552 total_packets++; 1553 } 1554 atl1c_clean_buffer(pdev, buffer_info); 1555 if (++next_to_clean == tpd_ring->count) 1556 next_to_clean = 0; 1557 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1558 } 1559 1560 netdev_completed_queue(adapter->netdev, total_packets, total_bytes); 1561 1562 if (netif_queue_stopped(adapter->netdev) && 1563 netif_carrier_ok(adapter->netdev)) { 1564 netif_wake_queue(adapter->netdev); 1565 } 1566 1567 if (total_packets < budget) { 1568 napi_complete_done(napi, total_packets); 1569 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1570 adapter->hw.intr_mask |= ISR_TX_PKT; 1571 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1572 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1573 return total_packets; 1574 } 1575 return budget; 1576 } 1577 1578 /** 1579 * atl1c_intr - Interrupt Handler 1580 * @irq: interrupt number 1581 * @data: pointer to a network interface device structure 1582 */ 1583 static irqreturn_t atl1c_intr(int irq, void *data) 1584 { 1585 struct net_device *netdev = data; 1586 struct atl1c_adapter *adapter = netdev_priv(netdev); 1587 struct pci_dev *pdev = adapter->pdev; 1588 struct atl1c_hw *hw = &adapter->hw; 1589 int max_ints = AT_MAX_INT_WORK; 1590 int handled = IRQ_NONE; 1591 u32 status; 1592 u32 reg_data; 1593 1594 do { 1595 AT_READ_REG(hw, REG_ISR, ®_data); 1596 status = reg_data & hw->intr_mask; 1597 1598 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1599 if (max_ints != AT_MAX_INT_WORK) 1600 handled = IRQ_HANDLED; 1601 break; 1602 } 1603 /* link event */ 1604 if (status & ISR_GPHY) 1605 atl1c_clear_phy_int(adapter); 1606 /* Ack ISR */ 1607 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1608 if (status & ISR_RX_PKT) { 1609 if (likely(napi_schedule_prep(&adapter->napi))) { 1610 spin_lock(&hw->intr_mask_lock); 1611 hw->intr_mask &= ~ISR_RX_PKT; 1612 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1613 spin_unlock(&hw->intr_mask_lock); 1614 __napi_schedule(&adapter->napi); 1615 } 1616 } 1617 if (status & ISR_TX_PKT) { 1618 if (napi_schedule_prep(&adapter->tx_napi)) { 1619 spin_lock(&hw->intr_mask_lock); 1620 hw->intr_mask &= ~ISR_TX_PKT; 1621 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1622 spin_unlock(&hw->intr_mask_lock); 1623 __napi_schedule(&adapter->tx_napi); 1624 } 1625 } 1626 1627 handled = IRQ_HANDLED; 1628 /* check if PCIE PHY Link down */ 1629 if (status & ISR_ERROR) { 1630 if (netif_msg_hw(adapter)) 1631 dev_err(&pdev->dev, 1632 "atl1c hardware error (status = 0x%x)\n", 1633 status & ISR_ERROR); 1634 /* reset MAC */ 1635 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1636 schedule_work(&adapter->common_task); 1637 return IRQ_HANDLED; 1638 } 1639 1640 if (status & ISR_OVER) 1641 if (netif_msg_intr(adapter)) 1642 dev_warn(&pdev->dev, 1643 "TX/RX overflow (status = 0x%x)\n", 1644 status & ISR_OVER); 1645 1646 /* link event */ 1647 if (status & (ISR_GPHY | ISR_MANUAL)) { 1648 netdev->stats.tx_carrier_errors++; 1649 atl1c_link_chg_event(adapter); 1650 break; 1651 } 1652 1653 } while (--max_ints > 0); 1654 /* re-enable Interrupt*/ 1655 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1656 return handled; 1657 } 1658 1659 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1660 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1661 { 1662 /* 1663 * The pid field in RRS in not correct sometimes, so we 1664 * cannot figure out if the packet is fragmented or not, 1665 * so we tell the KERNEL CHECKSUM_NONE 1666 */ 1667 skb_checksum_none_assert(skb); 1668 } 1669 1670 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter, 1671 bool napi_mode) 1672 { 1673 struct sk_buff *skb; 1674 struct page *page; 1675 1676 if (adapter->rx_frag_size > PAGE_SIZE) { 1677 if (likely(napi_mode)) 1678 return napi_alloc_skb(&adapter->napi, 1679 adapter->rx_buffer_len); 1680 else 1681 return netdev_alloc_skb_ip_align(adapter->netdev, 1682 adapter->rx_buffer_len); 1683 } 1684 1685 page = adapter->rx_page; 1686 if (!page) { 1687 adapter->rx_page = page = alloc_page(GFP_ATOMIC); 1688 if (unlikely(!page)) 1689 return NULL; 1690 adapter->rx_page_offset = 0; 1691 } 1692 1693 skb = build_skb(page_address(page) + adapter->rx_page_offset, 1694 adapter->rx_frag_size); 1695 if (likely(skb)) { 1696 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); 1697 adapter->rx_page_offset += adapter->rx_frag_size; 1698 if (adapter->rx_page_offset >= PAGE_SIZE) 1699 adapter->rx_page = NULL; 1700 else 1701 get_page(page); 1702 } 1703 return skb; 1704 } 1705 1706 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, bool napi_mode) 1707 { 1708 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1709 struct pci_dev *pdev = adapter->pdev; 1710 struct atl1c_buffer *buffer_info, *next_info; 1711 struct sk_buff *skb; 1712 void *vir_addr = NULL; 1713 u16 num_alloc = 0; 1714 u16 rfd_next_to_use, next_next; 1715 struct atl1c_rx_free_desc *rfd_desc; 1716 dma_addr_t mapping; 1717 1718 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1719 if (++next_next == rfd_ring->count) 1720 next_next = 0; 1721 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1722 next_info = &rfd_ring->buffer_info[next_next]; 1723 1724 while (next_info->flags & ATL1C_BUFFER_FREE) { 1725 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1726 1727 skb = atl1c_alloc_skb(adapter, napi_mode); 1728 if (unlikely(!skb)) { 1729 if (netif_msg_rx_err(adapter)) 1730 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1731 break; 1732 } 1733 1734 /* 1735 * Make buffer alignment 2 beyond a 16 byte boundary 1736 * this will result in a 16 byte aligned IP header after 1737 * the 14 byte MAC header is removed 1738 */ 1739 vir_addr = skb->data; 1740 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1741 buffer_info->skb = skb; 1742 buffer_info->length = adapter->rx_buffer_len; 1743 mapping = dma_map_single(&pdev->dev, vir_addr, 1744 buffer_info->length, DMA_FROM_DEVICE); 1745 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) { 1746 dev_kfree_skb(skb); 1747 buffer_info->skb = NULL; 1748 buffer_info->length = 0; 1749 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1750 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1751 break; 1752 } 1753 buffer_info->dma = mapping; 1754 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1755 ATL1C_PCIMAP_FROMDEVICE); 1756 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1757 rfd_next_to_use = next_next; 1758 if (++next_next == rfd_ring->count) 1759 next_next = 0; 1760 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1761 next_info = &rfd_ring->buffer_info[next_next]; 1762 num_alloc++; 1763 } 1764 1765 if (num_alloc) { 1766 /* TODO: update mailbox here */ 1767 wmb(); 1768 rfd_ring->next_to_use = rfd_next_to_use; 1769 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1770 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1771 } 1772 1773 return num_alloc; 1774 } 1775 1776 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1777 struct atl1c_recv_ret_status *rrs, u16 num) 1778 { 1779 u16 i; 1780 /* the relationship between rrd and rfd is one map one */ 1781 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1782 rrd_ring->next_to_clean)) { 1783 rrs->word3 &= ~RRS_RXD_UPDATED; 1784 if (++rrd_ring->next_to_clean == rrd_ring->count) 1785 rrd_ring->next_to_clean = 0; 1786 } 1787 } 1788 1789 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1790 struct atl1c_recv_ret_status *rrs, u16 num) 1791 { 1792 u16 i; 1793 u16 rfd_index; 1794 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1795 1796 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1797 RRS_RX_RFD_INDEX_MASK; 1798 for (i = 0; i < num; i++) { 1799 buffer_info[rfd_index].skb = NULL; 1800 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1801 ATL1C_BUFFER_FREE); 1802 if (++rfd_index == rfd_ring->count) 1803 rfd_index = 0; 1804 } 1805 rfd_ring->next_to_clean = rfd_index; 1806 } 1807 1808 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1809 int *work_done, int work_to_do) 1810 { 1811 u16 rfd_num, rfd_index; 1812 u16 count = 0; 1813 u16 length; 1814 struct pci_dev *pdev = adapter->pdev; 1815 struct net_device *netdev = adapter->netdev; 1816 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1817 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1818 struct sk_buff *skb; 1819 struct atl1c_recv_ret_status *rrs; 1820 struct atl1c_buffer *buffer_info; 1821 1822 while (1) { 1823 if (*work_done >= work_to_do) 1824 break; 1825 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1826 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1827 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1828 RRS_RX_RFD_CNT_MASK; 1829 if (unlikely(rfd_num != 1)) 1830 /* TODO support mul rfd*/ 1831 if (netif_msg_rx_err(adapter)) 1832 dev_warn(&pdev->dev, 1833 "Multi rfd not support yet!\n"); 1834 goto rrs_checked; 1835 } else { 1836 break; 1837 } 1838 rrs_checked: 1839 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1840 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1841 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1842 if (netif_msg_rx_err(adapter)) 1843 dev_warn(&pdev->dev, 1844 "wrong packet! rrs word3 is %x\n", 1845 rrs->word3); 1846 continue; 1847 } 1848 1849 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1850 RRS_PKT_SIZE_MASK); 1851 /* Good Receive */ 1852 if (likely(rfd_num == 1)) { 1853 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1854 RRS_RX_RFD_INDEX_MASK; 1855 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1856 dma_unmap_single(&pdev->dev, buffer_info->dma, 1857 buffer_info->length, DMA_FROM_DEVICE); 1858 skb = buffer_info->skb; 1859 } else { 1860 /* TODO */ 1861 if (netif_msg_rx_err(adapter)) 1862 dev_warn(&pdev->dev, 1863 "Multi rfd not support yet!\n"); 1864 break; 1865 } 1866 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1867 skb_put(skb, length - ETH_FCS_LEN); 1868 skb->protocol = eth_type_trans(skb, netdev); 1869 atl1c_rx_checksum(adapter, skb, rrs); 1870 if (rrs->word3 & RRS_VLAN_INS) { 1871 u16 vlan; 1872 1873 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1874 vlan = le16_to_cpu(vlan); 1875 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1876 } 1877 napi_gro_receive(&adapter->napi, skb); 1878 1879 (*work_done)++; 1880 count++; 1881 } 1882 if (count) 1883 atl1c_alloc_rx_buffer(adapter, true); 1884 } 1885 1886 /** 1887 * atl1c_clean - NAPI Rx polling callback 1888 * @napi: napi info 1889 * @budget: limit of packets to clean 1890 */ 1891 static int atl1c_clean(struct napi_struct *napi, int budget) 1892 { 1893 struct atl1c_adapter *adapter = 1894 container_of(napi, struct atl1c_adapter, napi); 1895 int work_done = 0; 1896 unsigned long flags; 1897 1898 /* Keep link state information with original netdev */ 1899 if (!netif_carrier_ok(adapter->netdev)) 1900 goto quit_polling; 1901 /* just enable one RXQ */ 1902 atl1c_clean_rx_irq(adapter, &work_done, budget); 1903 1904 if (work_done < budget) { 1905 quit_polling: 1906 napi_complete_done(napi, work_done); 1907 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1908 adapter->hw.intr_mask |= ISR_RX_PKT; 1909 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1910 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1911 } 1912 return work_done; 1913 } 1914 1915 #ifdef CONFIG_NET_POLL_CONTROLLER 1916 1917 /* 1918 * Polling 'interrupt' - used by things like netconsole to send skbs 1919 * without having to re-enable interrupts. It's not called while 1920 * the interrupt routine is executing. 1921 */ 1922 static void atl1c_netpoll(struct net_device *netdev) 1923 { 1924 struct atl1c_adapter *adapter = netdev_priv(netdev); 1925 1926 disable_irq(adapter->pdev->irq); 1927 atl1c_intr(adapter->pdev->irq, netdev); 1928 enable_irq(adapter->pdev->irq); 1929 } 1930 #endif 1931 1932 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1933 { 1934 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1935 u16 next_to_use = 0; 1936 u16 next_to_clean = 0; 1937 1938 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1939 next_to_use = tpd_ring->next_to_use; 1940 1941 return (u16)(next_to_clean > next_to_use) ? 1942 (next_to_clean - next_to_use - 1) : 1943 (tpd_ring->count + next_to_clean - next_to_use - 1); 1944 } 1945 1946 /* 1947 * get next usable tpd 1948 * Note: should call atl1c_tdp_avail to make sure 1949 * there is enough tpd to use 1950 */ 1951 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1952 enum atl1c_trans_queue type) 1953 { 1954 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1955 struct atl1c_tpd_desc *tpd_desc; 1956 u16 next_to_use = 0; 1957 1958 next_to_use = tpd_ring->next_to_use; 1959 if (++tpd_ring->next_to_use == tpd_ring->count) 1960 tpd_ring->next_to_use = 0; 1961 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1962 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1963 return tpd_desc; 1964 } 1965 1966 static struct atl1c_buffer * 1967 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1968 { 1969 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1970 1971 return &tpd_ring->buffer_info[tpd - 1972 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1973 } 1974 1975 /* Calculate the transmit packet descript needed*/ 1976 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1977 { 1978 u16 tpd_req; 1979 u16 proto_hdr_len = 0; 1980 1981 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1982 1983 if (skb_is_gso(skb)) { 1984 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1985 if (proto_hdr_len < skb_headlen(skb)) 1986 tpd_req++; 1987 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1988 tpd_req++; 1989 } 1990 return tpd_req; 1991 } 1992 1993 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1994 struct sk_buff *skb, 1995 struct atl1c_tpd_desc **tpd, 1996 enum atl1c_trans_queue type) 1997 { 1998 struct pci_dev *pdev = adapter->pdev; 1999 unsigned short offload_type; 2000 u8 hdr_len; 2001 u32 real_len; 2002 2003 if (skb_is_gso(skb)) { 2004 int err; 2005 2006 err = skb_cow_head(skb, 0); 2007 if (err < 0) 2008 return err; 2009 2010 offload_type = skb_shinfo(skb)->gso_type; 2011 2012 if (offload_type & SKB_GSO_TCPV4) { 2013 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 2014 + ntohs(ip_hdr(skb)->tot_len)); 2015 2016 if (real_len < skb->len) 2017 pskb_trim(skb, real_len); 2018 2019 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2020 if (unlikely(skb->len == hdr_len)) { 2021 /* only xsum need */ 2022 if (netif_msg_tx_queued(adapter)) 2023 dev_warn(&pdev->dev, 2024 "IPV4 tso with zero data??\n"); 2025 goto check_sum; 2026 } else { 2027 ip_hdr(skb)->check = 0; 2028 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2029 ip_hdr(skb)->saddr, 2030 ip_hdr(skb)->daddr, 2031 0, IPPROTO_TCP, 0); 2032 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2033 } 2034 } 2035 2036 if (offload_type & SKB_GSO_TCPV6) { 2037 struct atl1c_tpd_ext_desc *etpd = 2038 *(struct atl1c_tpd_ext_desc **)(tpd); 2039 2040 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2041 *tpd = atl1c_get_tpd(adapter, type); 2042 ipv6_hdr(skb)->payload_len = 0; 2043 /* check payload == 0 byte ? */ 2044 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2045 if (unlikely(skb->len == hdr_len)) { 2046 /* only xsum need */ 2047 if (netif_msg_tx_queued(adapter)) 2048 dev_warn(&pdev->dev, 2049 "IPV6 tso with zero data??\n"); 2050 goto check_sum; 2051 } else 2052 tcp_v6_gso_csum_prep(skb); 2053 2054 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2055 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2056 etpd->pkt_len = cpu_to_le32(skb->len); 2057 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2058 } 2059 2060 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2061 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2062 TPD_TCPHDR_OFFSET_SHIFT; 2063 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2064 TPD_MSS_SHIFT; 2065 return 0; 2066 } 2067 2068 check_sum: 2069 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2070 u8 css, cso; 2071 cso = skb_checksum_start_offset(skb); 2072 2073 if (unlikely(cso & 0x1)) { 2074 if (netif_msg_tx_err(adapter)) 2075 dev_err(&adapter->pdev->dev, 2076 "payload offset should not an event number\n"); 2077 return -1; 2078 } else { 2079 css = cso + skb->csum_offset; 2080 2081 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2082 TPD_PLOADOFFSET_SHIFT; 2083 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2084 TPD_CCSUM_OFFSET_SHIFT; 2085 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2086 } 2087 } 2088 return 0; 2089 } 2090 2091 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2092 struct atl1c_tpd_desc *first_tpd, 2093 enum atl1c_trans_queue type) 2094 { 2095 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2096 struct atl1c_buffer *buffer_info; 2097 struct atl1c_tpd_desc *tpd; 2098 u16 first_index, index; 2099 2100 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2101 index = first_index; 2102 while (index != tpd_ring->next_to_use) { 2103 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2104 buffer_info = &tpd_ring->buffer_info[index]; 2105 atl1c_clean_buffer(adpt->pdev, buffer_info); 2106 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2107 if (++index == tpd_ring->count) 2108 index = 0; 2109 } 2110 tpd_ring->next_to_use = first_index; 2111 } 2112 2113 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2114 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2115 enum atl1c_trans_queue type) 2116 { 2117 struct atl1c_tpd_desc *use_tpd = NULL; 2118 struct atl1c_buffer *buffer_info = NULL; 2119 u16 buf_len = skb_headlen(skb); 2120 u16 map_len = 0; 2121 u16 mapped_len = 0; 2122 u16 hdr_len = 0; 2123 u16 nr_frags; 2124 u16 f; 2125 int tso; 2126 2127 nr_frags = skb_shinfo(skb)->nr_frags; 2128 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2129 if (tso) { 2130 /* TSO */ 2131 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2132 use_tpd = tpd; 2133 2134 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2135 buffer_info->length = map_len; 2136 buffer_info->dma = dma_map_single(&adapter->pdev->dev, 2137 skb->data, hdr_len, 2138 DMA_TO_DEVICE); 2139 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2140 goto err_dma; 2141 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2142 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2143 ATL1C_PCIMAP_TODEVICE); 2144 mapped_len += map_len; 2145 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2146 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2147 } 2148 2149 if (mapped_len < buf_len) { 2150 /* mapped_len == 0, means we should use the first tpd, 2151 which is given by caller */ 2152 if (mapped_len == 0) 2153 use_tpd = tpd; 2154 else { 2155 use_tpd = atl1c_get_tpd(adapter, type); 2156 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2157 } 2158 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2159 buffer_info->length = buf_len - mapped_len; 2160 buffer_info->dma = 2161 dma_map_single(&adapter->pdev->dev, 2162 skb->data + mapped_len, 2163 buffer_info->length, DMA_TO_DEVICE); 2164 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2165 goto err_dma; 2166 2167 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2168 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2169 ATL1C_PCIMAP_TODEVICE); 2170 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2171 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2172 } 2173 2174 for (f = 0; f < nr_frags; f++) { 2175 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2176 2177 use_tpd = atl1c_get_tpd(adapter, type); 2178 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2179 2180 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2181 buffer_info->length = skb_frag_size(frag); 2182 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2183 frag, 0, 2184 buffer_info->length, 2185 DMA_TO_DEVICE); 2186 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2187 goto err_dma; 2188 2189 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2190 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2191 ATL1C_PCIMAP_TODEVICE); 2192 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2193 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2194 } 2195 2196 /* The last tpd */ 2197 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2198 /* The last buffer info contain the skb address, 2199 so it will be free after unmap */ 2200 buffer_info->skb = skb; 2201 2202 return 0; 2203 2204 err_dma: 2205 buffer_info->dma = 0; 2206 buffer_info->length = 0; 2207 return -1; 2208 } 2209 2210 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2211 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2212 { 2213 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2214 u16 reg; 2215 2216 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2217 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2218 } 2219 2220 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2221 struct net_device *netdev) 2222 { 2223 struct atl1c_adapter *adapter = netdev_priv(netdev); 2224 u16 tpd_req; 2225 struct atl1c_tpd_desc *tpd; 2226 enum atl1c_trans_queue type = atl1c_trans_normal; 2227 2228 if (test_bit(__AT_DOWN, &adapter->flags)) { 2229 dev_kfree_skb_any(skb); 2230 return NETDEV_TX_OK; 2231 } 2232 2233 tpd_req = atl1c_cal_tpd_req(skb); 2234 2235 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2236 /* no enough descriptor, just stop queue */ 2237 netif_stop_queue(netdev); 2238 return NETDEV_TX_BUSY; 2239 } 2240 2241 tpd = atl1c_get_tpd(adapter, type); 2242 2243 /* do TSO and check sum */ 2244 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2245 dev_kfree_skb_any(skb); 2246 return NETDEV_TX_OK; 2247 } 2248 2249 if (unlikely(skb_vlan_tag_present(skb))) { 2250 u16 vlan = skb_vlan_tag_get(skb); 2251 __le16 tag; 2252 2253 vlan = cpu_to_le16(vlan); 2254 AT_VLAN_TO_TAG(vlan, tag); 2255 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2256 tpd->vlan_tag = tag; 2257 } 2258 2259 if (skb_network_offset(skb) != ETH_HLEN) 2260 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2261 2262 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2263 netif_info(adapter, tx_done, adapter->netdev, 2264 "tx-skb dropped due to dma error\n"); 2265 /* roll back tpd/buffer */ 2266 atl1c_tx_rollback(adapter, tpd, type); 2267 dev_kfree_skb_any(skb); 2268 } else { 2269 netdev_sent_queue(adapter->netdev, skb->len); 2270 atl1c_tx_queue(adapter, skb, tpd, type); 2271 } 2272 2273 return NETDEV_TX_OK; 2274 } 2275 2276 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2277 { 2278 struct net_device *netdev = adapter->netdev; 2279 2280 free_irq(adapter->pdev->irq, netdev); 2281 2282 if (adapter->have_msi) 2283 pci_disable_msi(adapter->pdev); 2284 } 2285 2286 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2287 { 2288 struct pci_dev *pdev = adapter->pdev; 2289 struct net_device *netdev = adapter->netdev; 2290 int flags = 0; 2291 int err = 0; 2292 2293 adapter->have_msi = true; 2294 err = pci_enable_msi(adapter->pdev); 2295 if (err) { 2296 if (netif_msg_ifup(adapter)) 2297 dev_err(&pdev->dev, 2298 "Unable to allocate MSI interrupt Error: %d\n", 2299 err); 2300 adapter->have_msi = false; 2301 } 2302 2303 if (!adapter->have_msi) 2304 flags |= IRQF_SHARED; 2305 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2306 netdev->name, netdev); 2307 if (err) { 2308 if (netif_msg_ifup(adapter)) 2309 dev_err(&pdev->dev, 2310 "Unable to allocate interrupt Error: %d\n", 2311 err); 2312 if (adapter->have_msi) 2313 pci_disable_msi(adapter->pdev); 2314 return err; 2315 } 2316 if (netif_msg_ifup(adapter)) 2317 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2318 return err; 2319 } 2320 2321 2322 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2323 { 2324 /* release tx-pending skbs and reset tx/rx ring index */ 2325 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2326 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2327 atl1c_clean_rx_ring(adapter); 2328 } 2329 2330 static int atl1c_up(struct atl1c_adapter *adapter) 2331 { 2332 struct net_device *netdev = adapter->netdev; 2333 int err; 2334 2335 netif_carrier_off(netdev); 2336 2337 err = atl1c_configure(adapter); 2338 if (unlikely(err)) 2339 goto err_up; 2340 2341 err = atl1c_request_irq(adapter); 2342 if (unlikely(err)) 2343 goto err_up; 2344 2345 atl1c_check_link_status(adapter); 2346 clear_bit(__AT_DOWN, &adapter->flags); 2347 napi_enable(&adapter->napi); 2348 napi_enable(&adapter->tx_napi); 2349 atl1c_irq_enable(adapter); 2350 netif_start_queue(netdev); 2351 return err; 2352 2353 err_up: 2354 atl1c_clean_rx_ring(adapter); 2355 return err; 2356 } 2357 2358 static void atl1c_down(struct atl1c_adapter *adapter) 2359 { 2360 struct net_device *netdev = adapter->netdev; 2361 2362 atl1c_del_timer(adapter); 2363 adapter->work_event = 0; /* clear all event */ 2364 /* signal that we're down so the interrupt handler does not 2365 * reschedule our watchdog timer */ 2366 set_bit(__AT_DOWN, &adapter->flags); 2367 netif_carrier_off(netdev); 2368 napi_disable(&adapter->napi); 2369 napi_disable(&adapter->tx_napi); 2370 atl1c_irq_disable(adapter); 2371 atl1c_free_irq(adapter); 2372 /* disable ASPM if device inactive */ 2373 atl1c_disable_l0s_l1(&adapter->hw); 2374 /* reset MAC to disable all RX/TX */ 2375 atl1c_reset_mac(&adapter->hw); 2376 msleep(1); 2377 2378 adapter->link_speed = SPEED_0; 2379 adapter->link_duplex = -1; 2380 atl1c_reset_dma_ring(adapter); 2381 } 2382 2383 /** 2384 * atl1c_open - Called when a network interface is made active 2385 * @netdev: network interface device structure 2386 * 2387 * Returns 0 on success, negative value on failure 2388 * 2389 * The open entry point is called when a network interface is made 2390 * active by the system (IFF_UP). At this point all resources needed 2391 * for transmit and receive operations are allocated, the interrupt 2392 * handler is registered with the OS, the watchdog timer is started, 2393 * and the stack is notified that the interface is ready. 2394 */ 2395 static int atl1c_open(struct net_device *netdev) 2396 { 2397 struct atl1c_adapter *adapter = netdev_priv(netdev); 2398 int err; 2399 2400 /* disallow open during test */ 2401 if (test_bit(__AT_TESTING, &adapter->flags)) 2402 return -EBUSY; 2403 2404 /* allocate rx/tx dma buffer & descriptors */ 2405 err = atl1c_setup_ring_resources(adapter); 2406 if (unlikely(err)) 2407 return err; 2408 2409 err = atl1c_up(adapter); 2410 if (unlikely(err)) 2411 goto err_up; 2412 2413 return 0; 2414 2415 err_up: 2416 atl1c_free_irq(adapter); 2417 atl1c_free_ring_resources(adapter); 2418 atl1c_reset_mac(&adapter->hw); 2419 return err; 2420 } 2421 2422 /** 2423 * atl1c_close - Disables a network interface 2424 * @netdev: network interface device structure 2425 * 2426 * Returns 0, this is not allowed to fail 2427 * 2428 * The close entry point is called when an interface is de-activated 2429 * by the OS. The hardware is still under the drivers control, but 2430 * needs to be disabled. A global MAC reset is issued to stop the 2431 * hardware, and all transmit and receive resources are freed. 2432 */ 2433 static int atl1c_close(struct net_device *netdev) 2434 { 2435 struct atl1c_adapter *adapter = netdev_priv(netdev); 2436 2437 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2438 set_bit(__AT_DOWN, &adapter->flags); 2439 cancel_work_sync(&adapter->common_task); 2440 atl1c_down(adapter); 2441 atl1c_free_ring_resources(adapter); 2442 return 0; 2443 } 2444 2445 static int atl1c_suspend(struct device *dev) 2446 { 2447 struct net_device *netdev = dev_get_drvdata(dev); 2448 struct atl1c_adapter *adapter = netdev_priv(netdev); 2449 struct atl1c_hw *hw = &adapter->hw; 2450 u32 wufc = adapter->wol; 2451 2452 atl1c_disable_l0s_l1(hw); 2453 if (netif_running(netdev)) { 2454 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2455 atl1c_down(adapter); 2456 } 2457 netif_device_detach(netdev); 2458 2459 if (wufc) 2460 if (atl1c_phy_to_ps_link(hw) != 0) 2461 dev_dbg(dev, "phy power saving failed"); 2462 2463 atl1c_power_saving(hw, wufc); 2464 2465 return 0; 2466 } 2467 2468 #ifdef CONFIG_PM_SLEEP 2469 static int atl1c_resume(struct device *dev) 2470 { 2471 struct net_device *netdev = dev_get_drvdata(dev); 2472 struct atl1c_adapter *adapter = netdev_priv(netdev); 2473 2474 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2475 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2476 2477 atl1c_phy_reset(&adapter->hw); 2478 atl1c_reset_mac(&adapter->hw); 2479 atl1c_phy_init(&adapter->hw); 2480 2481 netif_device_attach(netdev); 2482 if (netif_running(netdev)) 2483 atl1c_up(adapter); 2484 2485 return 0; 2486 } 2487 #endif 2488 2489 static void atl1c_shutdown(struct pci_dev *pdev) 2490 { 2491 struct net_device *netdev = pci_get_drvdata(pdev); 2492 struct atl1c_adapter *adapter = netdev_priv(netdev); 2493 2494 atl1c_suspend(&pdev->dev); 2495 pci_wake_from_d3(pdev, adapter->wol); 2496 pci_set_power_state(pdev, PCI_D3hot); 2497 } 2498 2499 static const struct net_device_ops atl1c_netdev_ops = { 2500 .ndo_open = atl1c_open, 2501 .ndo_stop = atl1c_close, 2502 .ndo_validate_addr = eth_validate_addr, 2503 .ndo_start_xmit = atl1c_xmit_frame, 2504 .ndo_set_mac_address = atl1c_set_mac_addr, 2505 .ndo_set_rx_mode = atl1c_set_multi, 2506 .ndo_change_mtu = atl1c_change_mtu, 2507 .ndo_fix_features = atl1c_fix_features, 2508 .ndo_set_features = atl1c_set_features, 2509 .ndo_do_ioctl = atl1c_ioctl, 2510 .ndo_tx_timeout = atl1c_tx_timeout, 2511 .ndo_get_stats = atl1c_get_stats, 2512 #ifdef CONFIG_NET_POLL_CONTROLLER 2513 .ndo_poll_controller = atl1c_netpoll, 2514 #endif 2515 }; 2516 2517 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2518 { 2519 SET_NETDEV_DEV(netdev, &pdev->dev); 2520 pci_set_drvdata(pdev, netdev); 2521 2522 netdev->netdev_ops = &atl1c_netdev_ops; 2523 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2524 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 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 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2575 if (err) { 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 dev_set_threaded(netdev, true); 2619 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2620 netif_napi_add(netdev, &adapter->tx_napi, atl1c_clean_tx, 64); 2621 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2622 /* setup the private structure */ 2623 err = atl1c_sw_init(adapter); 2624 if (err) { 2625 dev_err(&pdev->dev, "net device private data init failed\n"); 2626 goto err_sw_init; 2627 } 2628 /* set max MTU */ 2629 atl1c_set_max_mtu(netdev); 2630 2631 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2632 2633 /* Init GPHY as early as possible due to power saving issue */ 2634 atl1c_phy_reset(&adapter->hw); 2635 2636 err = atl1c_reset_mac(&adapter->hw); 2637 if (err) { 2638 err = -EIO; 2639 goto err_reset; 2640 } 2641 2642 /* reset the controller to 2643 * put the device in a known good starting state */ 2644 err = atl1c_phy_init(&adapter->hw); 2645 if (err) { 2646 err = -EIO; 2647 goto err_reset; 2648 } 2649 if (atl1c_read_mac_addr(&adapter->hw)) { 2650 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2651 netdev->addr_assign_type = NET_ADDR_RANDOM; 2652 } 2653 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2654 if (netif_msg_probe(adapter)) 2655 dev_dbg(&pdev->dev, "mac address : %pM\n", 2656 adapter->hw.mac_addr); 2657 2658 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2659 INIT_WORK(&adapter->common_task, atl1c_common_task); 2660 adapter->work_event = 0; 2661 err = register_netdev(netdev); 2662 if (err) { 2663 dev_err(&pdev->dev, "register netdevice failed\n"); 2664 goto err_register; 2665 } 2666 2667 cards_found++; 2668 return 0; 2669 2670 err_reset: 2671 err_register: 2672 err_sw_init: 2673 iounmap(adapter->hw.hw_addr); 2674 err_init_netdev: 2675 err_ioremap: 2676 free_netdev(netdev); 2677 err_alloc_etherdev: 2678 pci_release_regions(pdev); 2679 err_pci_reg: 2680 err_dma: 2681 pci_disable_device(pdev); 2682 return err; 2683 } 2684 2685 /** 2686 * atl1c_remove - Device Removal Routine 2687 * @pdev: PCI device information struct 2688 * 2689 * atl1c_remove is called by the PCI subsystem to alert the driver 2690 * that it should release a PCI device. The could be caused by a 2691 * Hot-Plug event, or because the driver is going to be removed from 2692 * memory. 2693 */ 2694 static void atl1c_remove(struct pci_dev *pdev) 2695 { 2696 struct net_device *netdev = pci_get_drvdata(pdev); 2697 struct atl1c_adapter *adapter = netdev_priv(netdev); 2698 2699 unregister_netdev(netdev); 2700 /* restore permanent address */ 2701 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2702 atl1c_phy_disable(&adapter->hw); 2703 2704 iounmap(adapter->hw.hw_addr); 2705 2706 pci_release_regions(pdev); 2707 pci_disable_device(pdev); 2708 free_netdev(netdev); 2709 } 2710 2711 /** 2712 * atl1c_io_error_detected - called when PCI error is detected 2713 * @pdev: Pointer to PCI device 2714 * @state: The current pci connection state 2715 * 2716 * This function is called after a PCI bus error affecting 2717 * this device has been detected. 2718 */ 2719 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2720 pci_channel_state_t state) 2721 { 2722 struct net_device *netdev = pci_get_drvdata(pdev); 2723 struct atl1c_adapter *adapter = netdev_priv(netdev); 2724 2725 netif_device_detach(netdev); 2726 2727 if (state == pci_channel_io_perm_failure) 2728 return PCI_ERS_RESULT_DISCONNECT; 2729 2730 if (netif_running(netdev)) 2731 atl1c_down(adapter); 2732 2733 pci_disable_device(pdev); 2734 2735 /* Request a slot slot reset. */ 2736 return PCI_ERS_RESULT_NEED_RESET; 2737 } 2738 2739 /** 2740 * atl1c_io_slot_reset - called after the pci bus has been reset. 2741 * @pdev: Pointer to PCI device 2742 * 2743 * Restart the card from scratch, as if from a cold-boot. Implementation 2744 * resembles the first-half of the e1000_resume routine. 2745 */ 2746 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2747 { 2748 struct net_device *netdev = pci_get_drvdata(pdev); 2749 struct atl1c_adapter *adapter = netdev_priv(netdev); 2750 2751 if (pci_enable_device(pdev)) { 2752 if (netif_msg_hw(adapter)) 2753 dev_err(&pdev->dev, 2754 "Cannot re-enable PCI device after reset\n"); 2755 return PCI_ERS_RESULT_DISCONNECT; 2756 } 2757 pci_set_master(pdev); 2758 2759 pci_enable_wake(pdev, PCI_D3hot, 0); 2760 pci_enable_wake(pdev, PCI_D3cold, 0); 2761 2762 atl1c_reset_mac(&adapter->hw); 2763 2764 return PCI_ERS_RESULT_RECOVERED; 2765 } 2766 2767 /** 2768 * atl1c_io_resume - called when traffic can start flowing again. 2769 * @pdev: Pointer to PCI device 2770 * 2771 * This callback is called when the error recovery driver tells us that 2772 * its OK to resume normal operation. Implementation resembles the 2773 * second-half of the atl1c_resume routine. 2774 */ 2775 static void atl1c_io_resume(struct pci_dev *pdev) 2776 { 2777 struct net_device *netdev = pci_get_drvdata(pdev); 2778 struct atl1c_adapter *adapter = netdev_priv(netdev); 2779 2780 if (netif_running(netdev)) { 2781 if (atl1c_up(adapter)) { 2782 if (netif_msg_hw(adapter)) 2783 dev_err(&pdev->dev, 2784 "Cannot bring device back up after reset\n"); 2785 return; 2786 } 2787 } 2788 2789 netif_device_attach(netdev); 2790 } 2791 2792 static const struct pci_error_handlers atl1c_err_handler = { 2793 .error_detected = atl1c_io_error_detected, 2794 .slot_reset = atl1c_io_slot_reset, 2795 .resume = atl1c_io_resume, 2796 }; 2797 2798 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2799 2800 static struct pci_driver atl1c_driver = { 2801 .name = atl1c_driver_name, 2802 .id_table = atl1c_pci_tbl, 2803 .probe = atl1c_probe, 2804 .remove = atl1c_remove, 2805 .shutdown = atl1c_shutdown, 2806 .err_handler = &atl1c_err_handler, 2807 .driver.pm = &atl1c_pm_ops, 2808 }; 2809 2810 module_pci_driver(atl1c_driver); 2811