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 struct atl1c_qregs { 40 u16 tpd_addr_lo; 41 u16 tpd_prod; 42 u16 tpd_cons; 43 u16 rfd_addr_lo; 44 u16 rrd_addr_lo; 45 u16 rfd_prod; 46 u32 tx_isr; 47 u32 rx_isr; 48 }; 49 50 static struct atl1c_qregs atl1c_qregs[AT_MAX_TRANSMIT_QUEUE] = { 51 { 52 REG_TPD_PRI0_ADDR_LO, REG_TPD_PRI0_PIDX, REG_TPD_PRI0_CIDX, 53 REG_RFD0_HEAD_ADDR_LO, REG_RRD0_HEAD_ADDR_LO, 54 REG_MB_RFD0_PROD_IDX, ISR_TX_PKT_0, ISR_RX_PKT_0 55 }, 56 { 57 REG_TPD_PRI1_ADDR_LO, REG_TPD_PRI1_PIDX, REG_TPD_PRI1_CIDX, 58 REG_RFD1_HEAD_ADDR_LO, REG_RRD1_HEAD_ADDR_LO, 59 REG_MB_RFD1_PROD_IDX, ISR_TX_PKT_1, ISR_RX_PKT_1 60 }, 61 { 62 REG_TPD_PRI2_ADDR_LO, REG_TPD_PRI2_PIDX, REG_TPD_PRI2_CIDX, 63 REG_RFD2_HEAD_ADDR_LO, REG_RRD2_HEAD_ADDR_LO, 64 REG_MB_RFD2_PROD_IDX, ISR_TX_PKT_2, ISR_RX_PKT_2 65 }, 66 { 67 REG_TPD_PRI3_ADDR_LO, REG_TPD_PRI3_PIDX, REG_TPD_PRI3_CIDX, 68 REG_RFD3_HEAD_ADDR_LO, REG_RRD3_HEAD_ADDR_LO, 69 REG_MB_RFD3_PROD_IDX, ISR_TX_PKT_3, ISR_RX_PKT_3 70 }, 71 }; 72 73 static int atl1c_stop_mac(struct atl1c_hw *hw); 74 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw); 75 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed); 76 static void atl1c_start_mac(struct atl1c_adapter *adapter); 77 static int atl1c_up(struct atl1c_adapter *adapter); 78 static void atl1c_down(struct atl1c_adapter *adapter); 79 static int atl1c_reset_mac(struct atl1c_hw *hw); 80 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); 81 static int atl1c_configure(struct atl1c_adapter *adapter); 82 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue, 83 bool napi_mode); 84 85 86 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | 87 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP; 88 static void atl1c_pcie_patch(struct atl1c_hw *hw) 89 { 90 u32 mst_data, data; 91 92 /* pclk sel could switch to 25M */ 93 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data); 94 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS; 95 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data); 96 97 /* WoL/PCIE related settings */ 98 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) { 99 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data); 100 data |= PCIE_PHYMISC_FORCE_RCV_DET; 101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data); 102 } else { /* new dev set bit5 of MASTER */ 103 if (!(mst_data & MASTER_CTRL_WAKEN_25M)) 104 AT_WRITE_REG(hw, REG_MASTER_CTRL, 105 mst_data | MASTER_CTRL_WAKEN_25M); 106 } 107 /* aspm/PCIE setting only for l2cb 1.0 */ 108 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) { 109 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data); 110 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW, 111 L2CB1_PCIE_PHYMISC2_CDR_BW); 112 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH, 113 L2CB1_PCIE_PHYMISC2_L0S_TH); 114 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data); 115 /* extend L1 sync timer */ 116 AT_READ_REG(hw, REG_LINK_CTRL, &data); 117 data |= LINK_CTRL_EXT_SYNC; 118 AT_WRITE_REG(hw, REG_LINK_CTRL, data); 119 } 120 /* l2cb 1.x & l1d 1.x */ 121 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) { 122 AT_READ_REG(hw, REG_PM_CTRL, &data); 123 data |= PM_CTRL_L0S_BUFSRX_EN; 124 AT_WRITE_REG(hw, REG_PM_CTRL, data); 125 /* clear vendor msg */ 126 AT_READ_REG(hw, REG_DMA_DBG, &data); 127 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG); 128 } 129 } 130 131 /* FIXME: no need any more ? */ 132 /* 133 * atl1c_init_pcie - init PCIE module 134 */ 135 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) 136 { 137 u32 data; 138 u32 pci_cmd; 139 struct pci_dev *pdev = hw->adapter->pdev; 140 int pos; 141 142 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd); 143 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 144 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 145 PCI_COMMAND_IO); 146 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd); 147 148 /* 149 * Clear any PowerSaveing Settings 150 */ 151 pci_enable_wake(pdev, PCI_D3hot, 0); 152 pci_enable_wake(pdev, PCI_D3cold, 0); 153 /* wol sts read-clear */ 154 AT_READ_REG(hw, REG_WOL_CTRL, &data); 155 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 156 157 /* 158 * Mask some pcie error bits 159 */ 160 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 161 if (pos) { 162 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); 163 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); 164 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); 165 } 166 /* clear error status */ 167 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, 168 PCI_EXP_DEVSTA_NFED | 169 PCI_EXP_DEVSTA_FED | 170 PCI_EXP_DEVSTA_CED | 171 PCI_EXP_DEVSTA_URD); 172 173 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data); 174 data &= ~LTSSM_ID_EN_WRO; 175 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data); 176 177 atl1c_pcie_patch(hw); 178 if (flag & ATL1C_PCIE_L0S_L1_DISABLE) 179 atl1c_disable_l0s_l1(hw); 180 181 msleep(5); 182 } 183 184 /** 185 * atl1c_irq_enable - Enable default interrupt generation settings 186 * @adapter: board private structure 187 */ 188 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter) 189 { 190 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 191 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF); 192 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 193 AT_WRITE_FLUSH(&adapter->hw); 194 } 195 } 196 197 /** 198 * atl1c_irq_disable - Mask off interrupt generation on the NIC 199 * @adapter: board private structure 200 */ 201 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter) 202 { 203 atomic_inc(&adapter->irq_sem); 204 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 205 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT); 206 AT_WRITE_FLUSH(&adapter->hw); 207 synchronize_irq(adapter->pdev->irq); 208 } 209 210 /* 211 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 212 * of the idle status register until the device is actually idle 213 */ 214 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 215 { 216 int timeout; 217 u32 data; 218 219 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 220 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 221 if ((data & modu_ctrl) == 0) 222 return 0; 223 msleep(1); 224 } 225 return data; 226 } 227 228 /** 229 * atl1c_phy_config - Timer Call-back 230 * @t: timer list containing pointer to netdev cast into an unsigned long 231 */ 232 static void atl1c_phy_config(struct timer_list *t) 233 { 234 struct atl1c_adapter *adapter = timer_container_of(adapter, t, 235 phy_config_timer); 236 struct atl1c_hw *hw = &adapter->hw; 237 unsigned long flags; 238 239 spin_lock_irqsave(&adapter->mdio_lock, flags); 240 atl1c_restart_autoneg(hw); 241 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 242 } 243 244 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 245 { 246 atl1c_down(adapter); 247 atl1c_up(adapter); 248 clear_bit(__AT_RESETTING, &adapter->flags); 249 } 250 251 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 252 { 253 struct atl1c_hw *hw = &adapter->hw; 254 struct net_device *netdev = adapter->netdev; 255 struct pci_dev *pdev = adapter->pdev; 256 int err; 257 unsigned long flags; 258 u16 speed, duplex; 259 bool link; 260 261 spin_lock_irqsave(&adapter->mdio_lock, flags); 262 link = atl1c_get_link_status(hw); 263 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 264 265 if (!link) { 266 /* link down */ 267 netif_carrier_off(netdev); 268 hw->hibernate = true; 269 if (atl1c_reset_mac(hw) != 0) 270 if (netif_msg_hw(adapter)) 271 dev_warn(&pdev->dev, "reset mac failed\n"); 272 atl1c_set_aspm(hw, SPEED_0); 273 atl1c_post_phy_linkchg(hw, SPEED_0); 274 atl1c_reset_dma_ring(adapter); 275 atl1c_configure(adapter); 276 } else { 277 /* Link Up */ 278 hw->hibernate = false; 279 spin_lock_irqsave(&adapter->mdio_lock, flags); 280 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 281 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 282 if (unlikely(err)) 283 return; 284 /* link result is our setting */ 285 if (adapter->link_speed != speed || 286 adapter->link_duplex != duplex) { 287 adapter->link_speed = speed; 288 adapter->link_duplex = duplex; 289 atl1c_set_aspm(hw, speed); 290 atl1c_post_phy_linkchg(hw, speed); 291 atl1c_start_mac(adapter); 292 if (netif_msg_link(adapter)) 293 dev_info(&pdev->dev, 294 "%s: %s NIC Link is Up<%d Mbps %s>\n", 295 atl1c_driver_name, netdev->name, 296 adapter->link_speed, 297 adapter->link_duplex == FULL_DUPLEX ? 298 "Full Duplex" : "Half Duplex"); 299 } 300 if (!netif_carrier_ok(netdev)) 301 netif_carrier_on(netdev); 302 } 303 } 304 305 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 306 { 307 struct net_device *netdev = adapter->netdev; 308 struct pci_dev *pdev = adapter->pdev; 309 bool link; 310 311 spin_lock(&adapter->mdio_lock); 312 link = atl1c_get_link_status(&adapter->hw); 313 spin_unlock(&adapter->mdio_lock); 314 /* notify upper layer link down ASAP */ 315 if (!link) { 316 if (netif_carrier_ok(netdev)) { 317 /* old link state: Up */ 318 netif_carrier_off(netdev); 319 if (netif_msg_link(adapter)) 320 dev_info(&pdev->dev, 321 "%s: %s NIC Link is Down\n", 322 atl1c_driver_name, netdev->name); 323 adapter->link_speed = SPEED_0; 324 } 325 } 326 327 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 328 schedule_work(&adapter->common_task); 329 } 330 331 static void atl1c_common_task(struct work_struct *work) 332 { 333 struct atl1c_adapter *adapter; 334 struct net_device *netdev; 335 336 adapter = container_of(work, struct atl1c_adapter, common_task); 337 netdev = adapter->netdev; 338 339 if (test_bit(__AT_DOWN, &adapter->flags)) 340 return; 341 342 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 343 netif_device_detach(netdev); 344 atl1c_down(adapter); 345 atl1c_up(adapter); 346 netif_device_attach(netdev); 347 } 348 349 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 350 &adapter->work_event)) { 351 atl1c_irq_disable(adapter); 352 atl1c_check_link_status(adapter); 353 atl1c_irq_enable(adapter); 354 } 355 } 356 357 358 static void atl1c_del_timer(struct atl1c_adapter *adapter) 359 { 360 timer_delete_sync(&adapter->phy_config_timer); 361 } 362 363 364 /** 365 * atl1c_tx_timeout - Respond to a Tx Hang 366 * @netdev: network interface device structure 367 * @txqueue: index of hanging tx queue 368 */ 369 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue) 370 { 371 struct atl1c_adapter *adapter = netdev_priv(netdev); 372 373 /* Do the reset outside of interrupt context */ 374 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 375 schedule_work(&adapter->common_task); 376 } 377 378 /** 379 * atl1c_set_multi - Multicast and Promiscuous mode set 380 * @netdev: network interface device structure 381 * 382 * The set_multi entry point is called whenever the multicast address 383 * list or the network interface flags are updated. This routine is 384 * responsible for configuring the hardware for proper multicast, 385 * promiscuous mode, and all-multi behavior. 386 */ 387 static void atl1c_set_multi(struct net_device *netdev) 388 { 389 struct atl1c_adapter *adapter = netdev_priv(netdev); 390 struct atl1c_hw *hw = &adapter->hw; 391 struct netdev_hw_addr *ha; 392 u32 mac_ctrl_data; 393 u32 hash_value; 394 395 /* Check for Promiscuous and All Multicast modes */ 396 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 397 398 if (netdev->flags & IFF_PROMISC) { 399 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 400 } else if (netdev->flags & IFF_ALLMULTI) { 401 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 402 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 403 } else { 404 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 405 } 406 407 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 408 409 /* clear the old settings from the multicast hash table */ 410 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 411 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 412 413 /* comoute mc addresses' hash value ,and put it into hash table */ 414 netdev_for_each_mc_addr(ha, netdev) { 415 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 416 atl1c_hash_set(hw, hash_value); 417 } 418 } 419 420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 421 { 422 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 423 /* enable VLAN tag insert/strip */ 424 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 425 } else { 426 /* disable VLAN tag insert/strip */ 427 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 428 } 429 } 430 431 static void atl1c_vlan_mode(struct net_device *netdev, 432 netdev_features_t features) 433 { 434 struct atl1c_adapter *adapter = netdev_priv(netdev); 435 struct pci_dev *pdev = adapter->pdev; 436 u32 mac_ctrl_data = 0; 437 438 if (netif_msg_pktdata(adapter)) 439 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 440 441 atl1c_irq_disable(adapter); 442 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 443 __atl1c_vlan_mode(features, &mac_ctrl_data); 444 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 445 atl1c_irq_enable(adapter); 446 } 447 448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 449 { 450 struct pci_dev *pdev = adapter->pdev; 451 452 if (netif_msg_pktdata(adapter)) 453 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 454 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 455 } 456 457 /** 458 * atl1c_set_mac_addr - Change the Ethernet Address of the NIC 459 * @netdev: network interface device structure 460 * @p: pointer to an address structure 461 * 462 * Returns 0 on success, negative on failure 463 */ 464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 465 { 466 struct atl1c_adapter *adapter = netdev_priv(netdev); 467 struct sockaddr *addr = p; 468 469 if (!is_valid_ether_addr(addr->sa_data)) 470 return -EADDRNOTAVAIL; 471 472 if (netif_running(netdev)) 473 return -EBUSY; 474 475 eth_hw_addr_set(netdev, addr->sa_data); 476 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 477 478 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 479 480 return 0; 481 } 482 483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 484 struct net_device *dev) 485 { 486 int mtu = dev->mtu; 487 488 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 489 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 490 } 491 492 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 493 netdev_features_t features) 494 { 495 struct atl1c_adapter *adapter = netdev_priv(netdev); 496 struct atl1c_hw *hw = &adapter->hw; 497 498 /* 499 * Since there is no support for separate rx/tx vlan accel 500 * enable/disable make sure tx flag is always in same state as rx. 501 */ 502 if (features & NETIF_F_HW_VLAN_CTAG_RX) 503 features |= NETIF_F_HW_VLAN_CTAG_TX; 504 else 505 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 506 507 if (hw->nic_type != athr_mt) { 508 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 509 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 510 } 511 512 return features; 513 } 514 515 static int atl1c_set_features(struct net_device *netdev, 516 netdev_features_t features) 517 { 518 netdev_features_t changed = netdev->features ^ features; 519 520 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 521 atl1c_vlan_mode(netdev, features); 522 523 return 0; 524 } 525 526 static void atl1c_set_max_mtu(struct net_device *netdev) 527 { 528 struct atl1c_adapter *adapter = netdev_priv(netdev); 529 struct atl1c_hw *hw = &adapter->hw; 530 531 switch (hw->nic_type) { 532 /* These (GbE) devices support jumbo packets, max_mtu 6122 */ 533 case athr_l1c: 534 case athr_l1d: 535 case athr_l1d_2: 536 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - 537 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 538 break; 539 case athr_mt: 540 netdev->max_mtu = 9500; 541 break; 542 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */ 543 default: 544 netdev->max_mtu = ETH_DATA_LEN; 545 break; 546 } 547 } 548 549 /** 550 * atl1c_change_mtu - Change the Maximum Transfer Unit 551 * @netdev: network interface device structure 552 * @new_mtu: new value for maximum frame size 553 * 554 * Returns 0 on success, negative on failure 555 */ 556 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 557 { 558 struct atl1c_adapter *adapter = netdev_priv(netdev); 559 560 /* set MTU */ 561 if (netif_running(netdev)) { 562 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 563 msleep(1); 564 WRITE_ONCE(netdev->mtu, new_mtu); 565 adapter->hw.max_frame_size = new_mtu; 566 atl1c_set_rxbufsize(adapter, netdev); 567 atl1c_down(adapter); 568 netdev_update_features(netdev); 569 atl1c_up(adapter); 570 clear_bit(__AT_RESETTING, &adapter->flags); 571 } 572 return 0; 573 } 574 575 /* 576 * caller should hold mdio_lock 577 */ 578 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 579 { 580 struct atl1c_adapter *adapter = netdev_priv(netdev); 581 u16 result; 582 583 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 584 return result; 585 } 586 587 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 588 int reg_num, int val) 589 { 590 struct atl1c_adapter *adapter = netdev_priv(netdev); 591 592 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 593 } 594 595 static int atl1c_mii_ioctl(struct net_device *netdev, 596 struct ifreq *ifr, int cmd) 597 { 598 struct atl1c_adapter *adapter = netdev_priv(netdev); 599 struct pci_dev *pdev = adapter->pdev; 600 struct mii_ioctl_data *data = if_mii(ifr); 601 unsigned long flags; 602 int retval = 0; 603 604 if (!netif_running(netdev)) 605 return -EINVAL; 606 607 spin_lock_irqsave(&adapter->mdio_lock, flags); 608 switch (cmd) { 609 case SIOCGMIIPHY: 610 data->phy_id = 0; 611 break; 612 613 case SIOCGMIIREG: 614 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 615 &data->val_out)) { 616 retval = -EIO; 617 goto out; 618 } 619 break; 620 621 case SIOCSMIIREG: 622 if (data->reg_num & ~(0x1F)) { 623 retval = -EFAULT; 624 goto out; 625 } 626 627 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 628 data->reg_num, data->val_in); 629 if (atl1c_write_phy_reg(&adapter->hw, 630 data->reg_num, data->val_in)) { 631 retval = -EIO; 632 goto out; 633 } 634 break; 635 636 default: 637 retval = -EOPNOTSUPP; 638 break; 639 } 640 out: 641 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 642 return retval; 643 } 644 645 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 646 { 647 switch (cmd) { 648 case SIOCGMIIPHY: 649 case SIOCGMIIREG: 650 case SIOCSMIIREG: 651 return atl1c_mii_ioctl(netdev, ifr, cmd); 652 default: 653 return -EOPNOTSUPP; 654 } 655 } 656 657 /** 658 * atl1c_alloc_queues - Allocate memory for all rings 659 * @adapter: board private structure to initialize 660 * 661 */ 662 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 663 { 664 return 0; 665 } 666 667 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev, 668 u8 __iomem *hw_addr) 669 { 670 switch (pdev->device) { 671 case PCI_DEVICE_ID_ATTANSIC_L2C: 672 return athr_l2c; 673 case PCI_DEVICE_ID_ATTANSIC_L1C: 674 return athr_l1c; 675 case PCI_DEVICE_ID_ATHEROS_L2C_B: 676 return athr_l2c_b; 677 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 678 return athr_l2c_b2; 679 case PCI_DEVICE_ID_ATHEROS_L1D: 680 return athr_l1d; 681 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 682 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC) 683 return athr_mt; 684 return athr_l1d_2; 685 default: 686 return athr_l1c; 687 } 688 } 689 690 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 691 { 692 u32 link_ctrl_data; 693 694 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 695 696 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 697 ATL1C_TXQ_MODE_ENHANCE; 698 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 699 ATL1C_ASPM_L1_SUPPORT; 700 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 701 702 if (hw->nic_type == athr_l1c || 703 hw->nic_type == athr_l1d || 704 hw->nic_type == athr_l1d_2) 705 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 706 return 0; 707 } 708 709 struct atl1c_platform_patch { 710 u16 pci_did; 711 u8 pci_revid; 712 u16 subsystem_vid; 713 u16 subsystem_did; 714 u32 patch_flag; 715 #define ATL1C_LINK_PATCH 0x1 716 }; 717 static const struct atl1c_platform_patch plats[] = { 718 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 719 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 720 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 721 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 722 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 723 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 724 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 725 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 726 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 727 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 728 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 729 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 730 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 731 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 732 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 733 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 734 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 735 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 736 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 737 {0}, 738 }; 739 740 static void atl1c_patch_assign(struct atl1c_hw *hw) 741 { 742 struct pci_dev *pdev = hw->adapter->pdev; 743 u32 misc_ctrl; 744 int i = 0; 745 746 hw->msi_lnkpatch = false; 747 748 while (plats[i].pci_did != 0) { 749 if (plats[i].pci_did == hw->device_id && 750 plats[i].pci_revid == hw->revision_id && 751 plats[i].subsystem_vid == hw->subsystem_vendor_id && 752 plats[i].subsystem_did == hw->subsystem_id) { 753 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 754 hw->msi_lnkpatch = true; 755 } 756 i++; 757 } 758 759 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 760 hw->revision_id == L2CB_V21) { 761 /* config access mode */ 762 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 763 REG_PCIE_DEV_MISC_CTRL); 764 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 765 misc_ctrl &= ~0x100; 766 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 767 REG_PCIE_DEV_MISC_CTRL); 768 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 769 } 770 } 771 /** 772 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 773 * @adapter: board private structure to initialize 774 * 775 * atl1c_sw_init initializes the Adapter private data structure. 776 * Fields are initialized based on PCI device information and 777 * OS network device settings (MTU size). 778 */ 779 static int atl1c_sw_init(struct atl1c_adapter *adapter) 780 { 781 struct atl1c_hw *hw = &adapter->hw; 782 struct pci_dev *pdev = adapter->pdev; 783 u32 revision; 784 int i; 785 786 adapter->wol = 0; 787 device_set_wakeup_enable(&pdev->dev, false); 788 adapter->link_speed = SPEED_0; 789 adapter->link_duplex = FULL_DUPLEX; 790 adapter->tpd_ring[0].count = 1024; 791 adapter->rfd_ring[0].count = 512; 792 793 hw->vendor_id = pdev->vendor; 794 hw->device_id = pdev->device; 795 hw->subsystem_vendor_id = pdev->subsystem_vendor; 796 hw->subsystem_id = pdev->subsystem_device; 797 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 798 hw->revision_id = revision & 0xFF; 799 /* before link up, we assume hibernate is true */ 800 hw->hibernate = true; 801 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 802 if (atl1c_setup_mac_funcs(hw) != 0) { 803 dev_err(&pdev->dev, "set mac function pointers failed\n"); 804 return -1; 805 } 806 atl1c_patch_assign(hw); 807 808 hw->intr_mask = IMR_NORMAL_MASK; 809 for (i = 0; i < adapter->tx_queue_count; ++i) 810 hw->intr_mask |= atl1c_qregs[i].tx_isr; 811 for (i = 0; i < adapter->rx_queue_count; ++i) 812 hw->intr_mask |= atl1c_qregs[i].rx_isr; 813 hw->phy_configured = false; 814 hw->preamble_len = 7; 815 hw->max_frame_size = adapter->netdev->mtu; 816 hw->autoneg_advertised = ADVERTISED_Autoneg; 817 hw->indirect_tab = 0xE4E4E4E4; 818 hw->base_cpu = 0; 819 820 hw->ict = 50000; /* 100ms */ 821 hw->smb_timer = 200000; /* 400ms */ 822 hw->rx_imt = 200; 823 hw->tx_imt = 1000; 824 825 hw->tpd_burst = 5; 826 hw->rfd_burst = 8; 827 hw->dma_order = atl1c_dma_ord_out; 828 hw->dmar_block = atl1c_dma_req_1024; 829 830 if (atl1c_alloc_queues(adapter)) { 831 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 832 return -ENOMEM; 833 } 834 /* TODO */ 835 atl1c_set_rxbufsize(adapter, adapter->netdev); 836 atomic_set(&adapter->irq_sem, 1); 837 spin_lock_init(&adapter->mdio_lock); 838 spin_lock_init(&adapter->hw.intr_mask_lock); 839 set_bit(__AT_DOWN, &adapter->flags); 840 841 return 0; 842 } 843 844 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 845 struct atl1c_buffer *buffer_info, 846 int budget) 847 { 848 u16 pci_driection; 849 if (buffer_info->flags & ATL1C_BUFFER_FREE) 850 return; 851 if (buffer_info->dma) { 852 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 853 pci_driection = DMA_FROM_DEVICE; 854 else 855 pci_driection = DMA_TO_DEVICE; 856 857 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 858 dma_unmap_single(&pdev->dev, buffer_info->dma, 859 buffer_info->length, pci_driection); 860 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 861 dma_unmap_page(&pdev->dev, buffer_info->dma, 862 buffer_info->length, pci_driection); 863 } 864 if (buffer_info->skb) 865 napi_consume_skb(buffer_info->skb, budget); 866 buffer_info->dma = 0; 867 buffer_info->skb = NULL; 868 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 869 } 870 /** 871 * atl1c_clean_tx_ring - Free Tx-skb 872 * @adapter: board private structure 873 * @queue: idx of transmit queue 874 */ 875 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 876 u32 queue) 877 { 878 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 879 struct atl1c_buffer *buffer_info; 880 struct pci_dev *pdev = adapter->pdev; 881 u16 index, ring_count; 882 883 ring_count = tpd_ring->count; 884 for (index = 0; index < ring_count; index++) { 885 buffer_info = &tpd_ring->buffer_info[index]; 886 atl1c_clean_buffer(pdev, buffer_info, 0); 887 } 888 889 netdev_tx_reset_queue(netdev_get_tx_queue(adapter->netdev, queue)); 890 891 /* Zero out Tx-buffers */ 892 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 893 ring_count); 894 atomic_set(&tpd_ring->next_to_clean, 0); 895 tpd_ring->next_to_use = 0; 896 } 897 898 /** 899 * atl1c_clean_rx_ring - Free rx-reservation skbs 900 * @adapter: board private structure 901 * @queue: idx of transmit queue 902 */ 903 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue) 904 { 905 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue]; 906 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue]; 907 struct atl1c_buffer *buffer_info; 908 struct pci_dev *pdev = adapter->pdev; 909 int j; 910 911 for (j = 0; j < rfd_ring->count; j++) { 912 buffer_info = &rfd_ring->buffer_info[j]; 913 atl1c_clean_buffer(pdev, buffer_info, 0); 914 } 915 /* zero out the descriptor ring */ 916 memset(rfd_ring->desc, 0, rfd_ring->size); 917 rfd_ring->next_to_clean = 0; 918 rfd_ring->next_to_use = 0; 919 rrd_ring->next_to_use = 0; 920 rrd_ring->next_to_clean = 0; 921 } 922 923 /* 924 * Read / Write Ptr Initialize: 925 */ 926 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 927 { 928 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 929 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring; 930 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring; 931 struct atl1c_buffer *buffer_info; 932 int i, j; 933 934 for (i = 0; i < adapter->tx_queue_count; i++) { 935 tpd_ring[i].next_to_use = 0; 936 atomic_set(&tpd_ring[i].next_to_clean, 0); 937 buffer_info = tpd_ring[i].buffer_info; 938 for (j = 0; j < tpd_ring->count; j++) 939 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 940 ATL1C_BUFFER_FREE); 941 } 942 for (i = 0; i < adapter->rx_queue_count; i++) { 943 rfd_ring[i].next_to_use = 0; 944 rfd_ring[i].next_to_clean = 0; 945 rrd_ring[i].next_to_use = 0; 946 rrd_ring[i].next_to_clean = 0; 947 for (j = 0; j < rfd_ring[i].count; j++) { 948 buffer_info = &rfd_ring[i].buffer_info[j]; 949 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 950 } 951 } 952 } 953 954 /** 955 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 956 * @adapter: board private structure 957 * 958 * Free all transmit software resources 959 */ 960 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 961 { 962 struct pci_dev *pdev = adapter->pdev; 963 964 dma_free_coherent(&pdev->dev, adapter->ring_header.size, 965 adapter->ring_header.desc, adapter->ring_header.dma); 966 adapter->ring_header.desc = NULL; 967 968 /* Note: just free tdp_ring.buffer_info, 969 * it contain rfd_ring.buffer_info, do not double free 970 */ 971 if (adapter->tpd_ring[0].buffer_info) { 972 kfree(adapter->tpd_ring[0].buffer_info); 973 adapter->tpd_ring[0].buffer_info = NULL; 974 } 975 } 976 977 /** 978 * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources 979 * @adapter: board private structure 980 * 981 * Return 0 on success, negative on failure 982 */ 983 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 984 { 985 struct pci_dev *pdev = adapter->pdev; 986 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 987 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring; 988 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring; 989 struct atl1c_ring_header *ring_header = &adapter->ring_header; 990 int tqc = adapter->tx_queue_count; 991 int rqc = adapter->rx_queue_count; 992 int size; 993 int i; 994 int count = 0; 995 u32 offset = 0; 996 997 /* Even though only one tpd queue is actually used, the "high" 998 * priority tpd queue also gets initialized 999 */ 1000 if (tqc == 1) 1001 tqc = 2; 1002 1003 for (i = 1; i < tqc; i++) 1004 tpd_ring[i].count = tpd_ring[0].count; 1005 1006 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc + 1007 rfd_ring->count * rqc); 1008 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 1009 if (unlikely(!tpd_ring->buffer_info)) 1010 goto err_nomem; 1011 1012 for (i = 0; i < tqc; i++) { 1013 tpd_ring[i].adapter = adapter; 1014 tpd_ring[i].num = i; 1015 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count); 1016 count += tpd_ring[i].count; 1017 } 1018 1019 for (i = 0; i < rqc; i++) { 1020 rrd_ring[i].adapter = adapter; 1021 rrd_ring[i].num = i; 1022 rrd_ring[i].count = rfd_ring[0].count; 1023 rfd_ring[i].count = rfd_ring[0].count; 1024 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count); 1025 count += rfd_ring->count; 1026 } 1027 1028 /* 1029 * real ring DMA buffer 1030 * each ring/block may need up to 8 bytes for alignment, hence the 1031 * additional bytes tacked onto the end. 1032 */ 1033 ring_header->size = 1034 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc + 1035 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc + 1036 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc + 1037 8 * 4; 1038 1039 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, 1040 &ring_header->dma, GFP_KERNEL); 1041 if (unlikely(!ring_header->desc)) { 1042 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1043 goto err_nomem; 1044 } 1045 /* init TPD ring */ 1046 1047 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1048 offset = tpd_ring[0].dma - ring_header->dma; 1049 for (i = 0; i < tqc; i++) { 1050 tpd_ring[i].dma = ring_header->dma + offset; 1051 tpd_ring[i].desc = (u8 *)ring_header->desc + offset; 1052 tpd_ring[i].size = 1053 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1054 offset += roundup(tpd_ring[i].size, 8); 1055 } 1056 for (i = 0; i < rqc; i++) { 1057 /* init RFD ring */ 1058 rfd_ring[i].dma = ring_header->dma + offset; 1059 rfd_ring[i].desc = (u8 *)ring_header->desc + offset; 1060 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) * 1061 rfd_ring[i].count; 1062 offset += roundup(rfd_ring[i].size, 8); 1063 1064 /* init RRD ring */ 1065 rrd_ring[i].dma = ring_header->dma + offset; 1066 rrd_ring[i].desc = (u8 *)ring_header->desc + offset; 1067 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) * 1068 rrd_ring[i].count; 1069 offset += roundup(rrd_ring[i].size, 8); 1070 } 1071 1072 return 0; 1073 1074 err_nomem: 1075 kfree(tpd_ring->buffer_info); 1076 return -ENOMEM; 1077 } 1078 1079 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1080 { 1081 struct atl1c_hw *hw = &adapter->hw; 1082 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring; 1083 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring; 1084 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1085 int i; 1086 int tx_queue_count = adapter->tx_queue_count; 1087 1088 if (tx_queue_count == 1) 1089 tx_queue_count = 2; 1090 1091 /* TPD */ 1092 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1093 (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1094 /* just enable normal priority TX queue */ 1095 for (i = 0; i < tx_queue_count; i++) { 1096 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo, 1097 (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK)); 1098 } 1099 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1100 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1101 1102 1103 /* RFD */ 1104 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1105 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1106 for (i = 0; i < adapter->rx_queue_count; i++) { 1107 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo, 1108 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK)); 1109 } 1110 1111 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1112 rfd_ring->count & RFD_RING_SIZE_MASK); 1113 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1114 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1115 1116 /* RRD */ 1117 for (i = 0; i < adapter->rx_queue_count; i++) { 1118 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo, 1119 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK)); 1120 } 1121 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1122 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1123 1124 if (hw->nic_type == athr_l2c_b) { 1125 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1126 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1127 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1128 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1129 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1130 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1131 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1132 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1133 } 1134 /* Load all of base address above */ 1135 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1136 } 1137 1138 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1139 { 1140 struct atl1c_hw *hw = &adapter->hw; 1141 int max_pay_load; 1142 u16 tx_offload_thresh; 1143 u32 txq_ctrl_data; 1144 1145 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1146 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1147 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1148 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1149 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1150 /* 1151 * if BIOS had changed the dam-read-max-length to an invalid value, 1152 * restore it to default value 1153 */ 1154 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1155 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1156 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1157 } 1158 txq_ctrl_data = 1159 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1160 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1161 1162 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1163 } 1164 1165 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1166 { 1167 struct atl1c_hw *hw = &adapter->hw; 1168 u32 rxq_ctrl_data; 1169 1170 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1171 RXQ_RFD_BURST_NUM_SHIFT; 1172 1173 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1174 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1175 1176 /* aspm for gigabit */ 1177 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1178 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1179 ASPM_THRUPUT_LIMIT_100M); 1180 1181 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1182 } 1183 1184 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1185 { 1186 struct atl1c_hw *hw = &adapter->hw; 1187 u32 dma_ctrl_data; 1188 1189 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1190 DMA_CTRL_RREQ_PRI_DATA | 1191 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1192 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1193 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1194 1195 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1196 } 1197 1198 /* 1199 * Stop the mac, transmit and receive units 1200 * hw - Struct containing variables accessed by shared code 1201 * return : 0 or idle status (if error) 1202 */ 1203 static int atl1c_stop_mac(struct atl1c_hw *hw) 1204 { 1205 u32 data; 1206 1207 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1208 data &= ~RXQ_CTRL_EN; 1209 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1210 1211 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1212 data &= ~TXQ_CTRL_EN; 1213 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1214 1215 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1216 1217 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1218 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1219 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1220 1221 return (int)atl1c_wait_until_idle(hw, 1222 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1223 } 1224 1225 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1226 { 1227 struct atl1c_hw *hw = &adapter->hw; 1228 u32 mac, txq, rxq; 1229 1230 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX; 1231 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1232 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1233 1234 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1235 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1236 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1237 1238 txq |= TXQ_CTRL_EN; 1239 rxq |= RXQ_CTRL_EN; 1240 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1241 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1242 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1243 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1244 MAC_CTRL_HASH_ALG_CRC32; 1245 if (hw->mac_duplex) 1246 mac |= MAC_CTRL_DUPLX; 1247 else 1248 mac &= ~MAC_CTRL_DUPLX; 1249 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1250 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1251 1252 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1253 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1254 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1255 } 1256 1257 /* 1258 * Reset the transmit and receive units; mask and clear all interrupts. 1259 * hw - Struct containing variables accessed by shared code 1260 * return : 0 or idle status (if error) 1261 */ 1262 static int atl1c_reset_mac(struct atl1c_hw *hw) 1263 { 1264 struct atl1c_adapter *adapter = hw->adapter; 1265 struct pci_dev *pdev = adapter->pdev; 1266 u32 ctrl_data = 0; 1267 1268 atl1c_stop_mac(hw); 1269 /* 1270 * Issue Soft Reset to the MAC. This will reset the chip's 1271 * transmit, receive, DMA. It will not effect 1272 * the current PCI configuration. The global reset bit is self- 1273 * clearing, and should clear within a microsecond. 1274 */ 1275 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1276 ctrl_data |= MASTER_CTRL_OOB_DIS; 1277 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1278 1279 AT_WRITE_FLUSH(hw); 1280 msleep(10); 1281 /* Wait at least 10ms for All module to be Idle */ 1282 1283 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1284 dev_err(&pdev->dev, 1285 "MAC state machine can't be idle since" 1286 " disabled for 10ms second\n"); 1287 return -1; 1288 } 1289 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1290 1291 /* driver control speed/duplex */ 1292 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1293 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1294 1295 /* clk switch setting */ 1296 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1297 switch (hw->nic_type) { 1298 case athr_l2c_b: 1299 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1300 SERDES_MAC_CLK_SLOWDOWN); 1301 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1302 break; 1303 case athr_l2c_b2: 1304 case athr_l1d_2: 1305 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1306 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1307 break; 1308 default: 1309 break; 1310 } 1311 1312 return 0; 1313 } 1314 1315 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1316 { 1317 u16 ctrl_flags = hw->ctrl_flags; 1318 1319 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1320 atl1c_set_aspm(hw, SPEED_0); 1321 hw->ctrl_flags = ctrl_flags; 1322 } 1323 1324 /* 1325 * Set ASPM state. 1326 * Enable/disable L0s/L1 depend on link state. 1327 */ 1328 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1329 { 1330 u32 pm_ctrl_data; 1331 u32 link_l1_timer; 1332 1333 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1334 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1335 PM_CTRL_ASPM_L0S_EN | 1336 PM_CTRL_MAC_ASPM_CHK); 1337 /* L1 timer */ 1338 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1339 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1340 link_l1_timer = 1341 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1342 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1343 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1344 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1345 } else { 1346 link_l1_timer = hw->nic_type == athr_l2c_b ? 1347 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1348 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1349 link_l1_timer = 1; 1350 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1351 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1352 } 1353 1354 /* L0S/L1 enable */ 1355 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1356 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1357 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1358 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1359 1360 /* l2cb & l1d & l2cb2 & l1d2 */ 1361 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1362 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1363 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1364 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1365 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1366 PM_CTRL_SERDES_PD_EX_L1 | 1367 PM_CTRL_CLK_SWH_L1; 1368 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1369 PM_CTRL_SERDES_PLL_L1_EN | 1370 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1371 PM_CTRL_SA_DLY_EN | 1372 PM_CTRL_HOTRST); 1373 /* disable l0s if link down or l2cb */ 1374 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1375 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1376 } else { /* l1c */ 1377 pm_ctrl_data = 1378 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1379 if (link_speed != SPEED_0) { 1380 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1381 PM_CTRL_SERDES_PLL_L1_EN | 1382 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1383 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1384 PM_CTRL_CLK_SWH_L1 | 1385 PM_CTRL_ASPM_L0S_EN | 1386 PM_CTRL_ASPM_L1_EN); 1387 } else { /* link down */ 1388 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1389 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1390 PM_CTRL_SERDES_PLL_L1_EN | 1391 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1392 PM_CTRL_ASPM_L0S_EN); 1393 } 1394 } 1395 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1396 1397 return; 1398 } 1399 1400 /** 1401 * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset 1402 * @adapter: board private structure 1403 * 1404 * Configure the Tx /Rx unit of the MAC after a reset. 1405 */ 1406 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1407 { 1408 struct atl1c_hw *hw = &adapter->hw; 1409 u32 master_ctrl_data = 0; 1410 u32 intr_modrt_data; 1411 u32 data; 1412 1413 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1414 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1415 MASTER_CTRL_RX_ITIMER_EN | 1416 MASTER_CTRL_INT_RDCLR); 1417 /* clear interrupt status */ 1418 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1419 /* Clear any WOL status */ 1420 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1421 /* set Interrupt Clear Timer 1422 * HW will enable self to assert interrupt event to system after 1423 * waiting x-time for software to notify it accept interrupt. 1424 */ 1425 1426 data = CLK_GATING_EN_ALL; 1427 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1428 if (hw->nic_type == athr_l2c_b) 1429 data &= ~CLK_GATING_RXMAC_EN; 1430 } else 1431 data = 0; 1432 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1433 1434 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1435 hw->ict & INT_RETRIG_TIMER_MASK); 1436 1437 atl1c_configure_des_ring(adapter); 1438 1439 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1440 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1441 IRQ_MODRT_TX_TIMER_SHIFT; 1442 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1443 IRQ_MODRT_RX_TIMER_SHIFT; 1444 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1445 master_ctrl_data |= 1446 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1447 } 1448 1449 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1450 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1451 1452 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1453 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1454 1455 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1456 hw->smb_timer & SMB_STAT_TIMER_MASK); 1457 1458 /* set MTU */ 1459 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1460 VLAN_HLEN + ETH_FCS_LEN); 1461 1462 atl1c_configure_tx(adapter); 1463 atl1c_configure_rx(adapter); 1464 atl1c_configure_dma(adapter); 1465 1466 return 0; 1467 } 1468 1469 static int atl1c_configure(struct atl1c_adapter *adapter) 1470 { 1471 struct net_device *netdev = adapter->netdev; 1472 int num; 1473 int i; 1474 1475 if (adapter->hw.nic_type == athr_mt) { 1476 u32 mode; 1477 1478 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode); 1479 if (adapter->rx_queue_count == 4) 1480 mode |= MT_MODE_4Q; 1481 else 1482 mode &= ~MT_MODE_4Q; 1483 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode); 1484 } 1485 1486 atl1c_init_ring_ptrs(adapter); 1487 atl1c_set_multi(netdev); 1488 atl1c_restore_vlan(adapter); 1489 1490 for (i = 0; i < adapter->rx_queue_count; ++i) { 1491 num = atl1c_alloc_rx_buffer(adapter, i, false); 1492 if (unlikely(num == 0)) 1493 return -ENOMEM; 1494 } 1495 1496 if (atl1c_configure_mac(adapter)) 1497 return -EIO; 1498 1499 return 0; 1500 } 1501 1502 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1503 { 1504 u16 hw_reg_addr = 0; 1505 unsigned long *stats_item = NULL; 1506 u32 data; 1507 1508 /* update rx status */ 1509 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1510 stats_item = &adapter->hw_stats.rx_ok; 1511 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1512 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1513 *stats_item += data; 1514 stats_item++; 1515 hw_reg_addr += 4; 1516 } 1517 /* update tx status */ 1518 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1519 stats_item = &adapter->hw_stats.tx_ok; 1520 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1521 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1522 *stats_item += data; 1523 stats_item++; 1524 hw_reg_addr += 4; 1525 } 1526 } 1527 1528 /** 1529 * atl1c_get_stats - Get System Network Statistics 1530 * @netdev: network interface device structure 1531 * 1532 * Returns the address of the device statistics structure. 1533 * The statistics are actually updated from the timer callback. 1534 */ 1535 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1536 { 1537 struct atl1c_adapter *adapter = netdev_priv(netdev); 1538 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1539 struct net_device_stats *net_stats = &netdev->stats; 1540 1541 atl1c_update_hw_stats(adapter); 1542 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1543 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1544 net_stats->multicast = hw_stats->rx_mcast; 1545 net_stats->collisions = hw_stats->tx_1_col + 1546 hw_stats->tx_2_col + 1547 hw_stats->tx_late_col + 1548 hw_stats->tx_abort_col; 1549 1550 net_stats->rx_errors = hw_stats->rx_frag + 1551 hw_stats->rx_fcs_err + 1552 hw_stats->rx_len_err + 1553 hw_stats->rx_sz_ov + 1554 hw_stats->rx_rrd_ov + 1555 hw_stats->rx_align_err + 1556 hw_stats->rx_rxf_ov; 1557 1558 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1559 net_stats->rx_length_errors = hw_stats->rx_len_err; 1560 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1561 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1562 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1563 1564 net_stats->tx_errors = hw_stats->tx_late_col + 1565 hw_stats->tx_abort_col + 1566 hw_stats->tx_underrun + 1567 hw_stats->tx_trunc; 1568 1569 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1570 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1571 net_stats->tx_window_errors = hw_stats->tx_late_col; 1572 1573 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1574 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1575 1576 return net_stats; 1577 } 1578 1579 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1580 { 1581 u16 phy_data; 1582 1583 spin_lock(&adapter->mdio_lock); 1584 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1585 spin_unlock(&adapter->mdio_lock); 1586 } 1587 1588 static int atl1c_clean_tx(struct napi_struct *napi, int budget) 1589 { 1590 struct atl1c_tpd_ring *tpd_ring = 1591 container_of(napi, struct atl1c_tpd_ring, napi); 1592 struct atl1c_adapter *adapter = tpd_ring->adapter; 1593 struct netdev_queue *txq = 1594 netdev_get_tx_queue(napi->dev, tpd_ring->num); 1595 struct atl1c_buffer *buffer_info; 1596 struct pci_dev *pdev = adapter->pdev; 1597 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1598 u16 hw_next_to_clean; 1599 unsigned int total_bytes = 0, total_packets = 0; 1600 unsigned long flags; 1601 1602 AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons, 1603 &hw_next_to_clean); 1604 1605 if (unlikely(hw_next_to_clean >= tpd_ring->count)) 1606 hw_next_to_clean = next_to_clean; 1607 1608 while (next_to_clean != hw_next_to_clean) { 1609 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1610 if (buffer_info->skb) { 1611 total_bytes += buffer_info->skb->len; 1612 total_packets++; 1613 } 1614 atl1c_clean_buffer(pdev, buffer_info, budget); 1615 if (++next_to_clean == tpd_ring->count) 1616 next_to_clean = 0; 1617 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1618 } 1619 1620 netdev_tx_completed_queue(txq, total_packets, total_bytes); 1621 1622 if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev)) 1623 netif_tx_wake_queue(txq); 1624 1625 if (total_packets < budget) { 1626 napi_complete_done(napi, total_packets); 1627 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1628 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr; 1629 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1630 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1631 return total_packets; 1632 } 1633 return budget; 1634 } 1635 1636 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status) 1637 { 1638 struct atl1c_hw *hw = &adapter->hw; 1639 u32 intr_mask; 1640 int i; 1641 1642 spin_lock(&hw->intr_mask_lock); 1643 intr_mask = hw->intr_mask; 1644 for (i = 0; i < adapter->rx_queue_count; ++i) { 1645 if (!(status & atl1c_qregs[i].rx_isr)) 1646 continue; 1647 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) { 1648 intr_mask &= ~atl1c_qregs[i].rx_isr; 1649 __napi_schedule(&adapter->rrd_ring[i].napi); 1650 } 1651 } 1652 for (i = 0; i < adapter->tx_queue_count; ++i) { 1653 if (!(status & atl1c_qregs[i].tx_isr)) 1654 continue; 1655 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) { 1656 intr_mask &= ~atl1c_qregs[i].tx_isr; 1657 __napi_schedule(&adapter->tpd_ring[i].napi); 1658 } 1659 } 1660 1661 if (hw->intr_mask != intr_mask) { 1662 hw->intr_mask = intr_mask; 1663 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1664 } 1665 spin_unlock(&hw->intr_mask_lock); 1666 } 1667 1668 /** 1669 * atl1c_intr - Interrupt Handler 1670 * @irq: interrupt number 1671 * @data: pointer to a network interface device structure 1672 */ 1673 static irqreturn_t atl1c_intr(int irq, void *data) 1674 { 1675 struct net_device *netdev = data; 1676 struct atl1c_adapter *adapter = netdev_priv(netdev); 1677 struct pci_dev *pdev = adapter->pdev; 1678 struct atl1c_hw *hw = &adapter->hw; 1679 int max_ints = AT_MAX_INT_WORK; 1680 int handled = IRQ_NONE; 1681 u32 status; 1682 u32 reg_data; 1683 1684 do { 1685 AT_READ_REG(hw, REG_ISR, ®_data); 1686 status = reg_data & hw->intr_mask; 1687 1688 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1689 if (max_ints != AT_MAX_INT_WORK) 1690 handled = IRQ_HANDLED; 1691 break; 1692 } 1693 /* link event */ 1694 if (status & ISR_GPHY) 1695 atl1c_clear_phy_int(adapter); 1696 /* Ack ISR */ 1697 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1698 if (status & (ISR_RX_PKT | ISR_TX_PKT)) 1699 atl1c_intr_rx_tx(adapter, status); 1700 1701 handled = IRQ_HANDLED; 1702 /* check if PCIE PHY Link down */ 1703 if (status & ISR_ERROR) { 1704 if (netif_msg_hw(adapter)) 1705 dev_err(&pdev->dev, 1706 "atl1c hardware error (status = 0x%x)\n", 1707 status & ISR_ERROR); 1708 /* reset MAC */ 1709 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1710 schedule_work(&adapter->common_task); 1711 return IRQ_HANDLED; 1712 } 1713 1714 if (status & ISR_OVER) 1715 if (netif_msg_intr(adapter)) 1716 dev_warn(&pdev->dev, 1717 "TX/RX overflow (status = 0x%x)\n", 1718 status & ISR_OVER); 1719 1720 /* link event */ 1721 if (status & (ISR_GPHY | ISR_MANUAL)) { 1722 netdev->stats.tx_carrier_errors++; 1723 atl1c_link_chg_event(adapter); 1724 break; 1725 } 1726 1727 } while (--max_ints > 0); 1728 /* re-enable Interrupt*/ 1729 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1730 return handled; 1731 } 1732 1733 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1734 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1735 { 1736 if (adapter->hw.nic_type == athr_mt) { 1737 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP) 1738 skb->ip_summed = CHECKSUM_UNNECESSARY; 1739 return; 1740 } 1741 /* 1742 * The pid field in RRS in not correct sometimes, so we 1743 * cannot figure out if the packet is fragmented or not, 1744 * so we tell the KERNEL CHECKSUM_NONE 1745 */ 1746 skb_checksum_none_assert(skb); 1747 } 1748 1749 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue, 1750 bool napi_mode) 1751 { 1752 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue]; 1753 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue]; 1754 struct pci_dev *pdev = adapter->pdev; 1755 struct atl1c_buffer *buffer_info, *next_info; 1756 struct sk_buff *skb; 1757 void *vir_addr = NULL; 1758 u16 num_alloc = 0; 1759 u16 rfd_next_to_use, next_next; 1760 struct atl1c_rx_free_desc *rfd_desc; 1761 dma_addr_t mapping; 1762 1763 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1764 if (++next_next == rfd_ring->count) 1765 next_next = 0; 1766 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1767 next_info = &rfd_ring->buffer_info[next_next]; 1768 1769 while (next_info->flags & ATL1C_BUFFER_FREE) { 1770 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1771 1772 /* When DMA RX address is set to something like 1773 * 0x....fc0, it will be very likely to cause DMA 1774 * RFD overflow issue. 1775 * 1776 * To work around it, we apply rx skb with 64 bytes 1777 * longer space, and offset the address whenever 1778 * 0x....fc0 is detected. 1779 */ 1780 if (likely(napi_mode)) 1781 skb = napi_alloc_skb(&rrd_ring->napi, adapter->rx_buffer_len + 64); 1782 else 1783 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len + 64); 1784 if (unlikely(!skb)) { 1785 if (netif_msg_rx_err(adapter)) 1786 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1787 break; 1788 } 1789 1790 if (((unsigned long)skb->data & 0xfff) == 0xfc0) 1791 skb_reserve(skb, 64); 1792 1793 /* 1794 * Make buffer alignment 2 beyond a 16 byte boundary 1795 * this will result in a 16 byte aligned IP header after 1796 * the 14 byte MAC header is removed 1797 */ 1798 vir_addr = skb->data; 1799 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1800 buffer_info->skb = skb; 1801 buffer_info->length = adapter->rx_buffer_len; 1802 mapping = dma_map_single(&pdev->dev, vir_addr, 1803 buffer_info->length, DMA_FROM_DEVICE); 1804 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) { 1805 dev_kfree_skb(skb); 1806 buffer_info->skb = NULL; 1807 buffer_info->length = 0; 1808 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1809 netif_warn(adapter, rx_err, adapter->netdev, "RX dma_map_single failed"); 1810 break; 1811 } 1812 buffer_info->dma = mapping; 1813 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1814 ATL1C_PCIMAP_FROMDEVICE); 1815 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1816 rfd_next_to_use = next_next; 1817 if (++next_next == rfd_ring->count) 1818 next_next = 0; 1819 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1820 next_info = &rfd_ring->buffer_info[next_next]; 1821 num_alloc++; 1822 } 1823 1824 if (num_alloc) { 1825 /* TODO: update mailbox here */ 1826 wmb(); 1827 rfd_ring->next_to_use = rfd_next_to_use; 1828 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod, 1829 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1830 } 1831 1832 return num_alloc; 1833 } 1834 1835 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1836 struct atl1c_recv_ret_status *rrs, u16 num) 1837 { 1838 u16 i; 1839 /* the relationship between rrd and rfd is one map one */ 1840 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1841 rrd_ring->next_to_clean)) { 1842 rrs->word3 &= ~RRS_RXD_UPDATED; 1843 if (++rrd_ring->next_to_clean == rrd_ring->count) 1844 rrd_ring->next_to_clean = 0; 1845 } 1846 } 1847 1848 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1849 struct atl1c_recv_ret_status *rrs, u16 num) 1850 { 1851 u16 i; 1852 u16 rfd_index; 1853 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1854 1855 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1856 RRS_RX_RFD_INDEX_MASK; 1857 for (i = 0; i < num; i++) { 1858 buffer_info[rfd_index].skb = NULL; 1859 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1860 ATL1C_BUFFER_FREE); 1861 if (++rfd_index == rfd_ring->count) 1862 rfd_index = 0; 1863 } 1864 rfd_ring->next_to_clean = rfd_index; 1865 } 1866 1867 /** 1868 * atl1c_clean_rx - NAPI Rx polling callback 1869 * @napi: napi info 1870 * @budget: limit of packets to clean 1871 */ 1872 static int atl1c_clean_rx(struct napi_struct *napi, int budget) 1873 { 1874 struct atl1c_rrd_ring *rrd_ring = 1875 container_of(napi, struct atl1c_rrd_ring, napi); 1876 struct atl1c_adapter *adapter = rrd_ring->adapter; 1877 u16 rfd_num, rfd_index; 1878 u16 length; 1879 struct pci_dev *pdev = adapter->pdev; 1880 struct net_device *netdev = adapter->netdev; 1881 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num]; 1882 struct sk_buff *skb; 1883 struct atl1c_recv_ret_status *rrs; 1884 struct atl1c_buffer *buffer_info; 1885 int work_done = 0; 1886 unsigned long flags; 1887 1888 /* Keep link state information with original netdev */ 1889 if (!netif_carrier_ok(adapter->netdev)) 1890 goto quit_polling; 1891 1892 while (1) { 1893 if (work_done >= budget) 1894 break; 1895 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1896 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1897 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1898 RRS_RX_RFD_CNT_MASK; 1899 if (unlikely(rfd_num != 1)) 1900 /* TODO support mul rfd*/ 1901 if (netif_msg_rx_err(adapter)) 1902 dev_warn(&pdev->dev, 1903 "Multi rfd not support yet!\n"); 1904 goto rrs_checked; 1905 } else { 1906 break; 1907 } 1908 rrs_checked: 1909 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1910 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1911 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1912 if (netif_msg_rx_err(adapter)) 1913 dev_warn(&pdev->dev, 1914 "wrong packet! rrs word3 is %x\n", 1915 rrs->word3); 1916 continue; 1917 } 1918 1919 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1920 RRS_PKT_SIZE_MASK); 1921 /* Good Receive */ 1922 if (likely(rfd_num == 1)) { 1923 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1924 RRS_RX_RFD_INDEX_MASK; 1925 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1926 dma_unmap_single(&pdev->dev, buffer_info->dma, 1927 buffer_info->length, DMA_FROM_DEVICE); 1928 skb = buffer_info->skb; 1929 } else { 1930 /* TODO */ 1931 if (netif_msg_rx_err(adapter)) 1932 dev_warn(&pdev->dev, 1933 "Multi rfd not support yet!\n"); 1934 break; 1935 } 1936 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1937 skb_put(skb, length - ETH_FCS_LEN); 1938 skb->protocol = eth_type_trans(skb, netdev); 1939 atl1c_rx_checksum(adapter, skb, rrs); 1940 if (rrs->word3 & RRS_VLAN_INS) { 1941 u16 vlan; 1942 1943 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1944 vlan = le16_to_cpu(vlan); 1945 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1946 } 1947 napi_gro_receive(napi, skb); 1948 1949 work_done++; 1950 } 1951 if (work_done) 1952 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true); 1953 1954 if (work_done < budget) { 1955 quit_polling: 1956 napi_complete_done(napi, work_done); 1957 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1958 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr; 1959 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1960 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1961 } 1962 return work_done; 1963 } 1964 1965 #ifdef CONFIG_NET_POLL_CONTROLLER 1966 1967 /* 1968 * Polling 'interrupt' - used by things like netconsole to send skbs 1969 * without having to re-enable interrupts. It's not called while 1970 * the interrupt routine is executing. 1971 */ 1972 static void atl1c_netpoll(struct net_device *netdev) 1973 { 1974 struct atl1c_adapter *adapter = netdev_priv(netdev); 1975 1976 disable_irq(adapter->pdev->irq); 1977 atl1c_intr(adapter->pdev->irq, netdev); 1978 enable_irq(adapter->pdev->irq); 1979 } 1980 #endif 1981 1982 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue) 1983 { 1984 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 1985 u16 next_to_use = 0; 1986 u16 next_to_clean = 0; 1987 1988 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1989 next_to_use = tpd_ring->next_to_use; 1990 1991 return (u16)(next_to_clean > next_to_use) ? 1992 (next_to_clean - next_to_use - 1) : 1993 (tpd_ring->count + next_to_clean - next_to_use - 1); 1994 } 1995 1996 /* 1997 * get next usable tpd 1998 * Note: should call atl1c_tdp_avail to make sure 1999 * there is enough tpd to use 2000 */ 2001 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 2002 u32 queue) 2003 { 2004 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 2005 struct atl1c_tpd_desc *tpd_desc; 2006 u16 next_to_use = 0; 2007 2008 next_to_use = tpd_ring->next_to_use; 2009 if (++tpd_ring->next_to_use == tpd_ring->count) 2010 tpd_ring->next_to_use = 0; 2011 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 2012 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 2013 return tpd_desc; 2014 } 2015 2016 static struct atl1c_buffer * 2017 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 2018 { 2019 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 2020 2021 return &tpd_ring->buffer_info[tpd - 2022 (struct atl1c_tpd_desc *)tpd_ring->desc]; 2023 } 2024 2025 /* Calculate the transmit packet descript needed*/ 2026 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 2027 { 2028 u16 tpd_req; 2029 u16 proto_hdr_len = 0; 2030 2031 tpd_req = skb_shinfo(skb)->nr_frags + 1; 2032 2033 if (skb_is_gso(skb)) { 2034 proto_hdr_len = skb_tcp_all_headers(skb); 2035 if (proto_hdr_len < skb_headlen(skb)) 2036 tpd_req++; 2037 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 2038 tpd_req++; 2039 } 2040 return tpd_req; 2041 } 2042 2043 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 2044 struct sk_buff *skb, 2045 struct atl1c_tpd_desc **tpd, 2046 u32 queue) 2047 { 2048 struct pci_dev *pdev = adapter->pdev; 2049 unsigned short offload_type; 2050 u8 hdr_len; 2051 u32 real_len; 2052 2053 if (skb_is_gso(skb)) { 2054 int err; 2055 2056 err = skb_cow_head(skb, 0); 2057 if (err < 0) 2058 return err; 2059 2060 offload_type = skb_shinfo(skb)->gso_type; 2061 2062 if (offload_type & SKB_GSO_TCPV4) { 2063 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 2064 + ntohs(ip_hdr(skb)->tot_len)); 2065 2066 if (real_len < skb->len) { 2067 err = pskb_trim(skb, real_len); 2068 if (err) 2069 return err; 2070 } 2071 2072 hdr_len = skb_tcp_all_headers(skb); 2073 if (unlikely(skb->len == hdr_len)) { 2074 /* only xsum need */ 2075 if (netif_msg_tx_queued(adapter)) 2076 dev_warn(&pdev->dev, 2077 "IPV4 tso with zero data??\n"); 2078 goto check_sum; 2079 } else { 2080 ip_hdr(skb)->check = 0; 2081 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2082 ip_hdr(skb)->saddr, 2083 ip_hdr(skb)->daddr, 2084 0, IPPROTO_TCP, 0); 2085 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2086 } 2087 } 2088 2089 if (offload_type & SKB_GSO_TCPV6) { 2090 struct atl1c_tpd_ext_desc *etpd = 2091 *(struct atl1c_tpd_ext_desc **)(tpd); 2092 2093 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2094 *tpd = atl1c_get_tpd(adapter, queue); 2095 ipv6_hdr(skb)->payload_len = 0; 2096 /* check payload == 0 byte ? */ 2097 hdr_len = skb_tcp_all_headers(skb); 2098 if (unlikely(skb->len == hdr_len)) { 2099 /* only xsum need */ 2100 if (netif_msg_tx_queued(adapter)) 2101 dev_warn(&pdev->dev, 2102 "IPV6 tso with zero data??\n"); 2103 goto check_sum; 2104 } else 2105 tcp_v6_gso_csum_prep(skb); 2106 2107 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2108 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2109 etpd->pkt_len = cpu_to_le32(skb->len); 2110 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2111 } 2112 2113 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2114 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2115 TPD_TCPHDR_OFFSET_SHIFT; 2116 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2117 TPD_MSS_SHIFT; 2118 return 0; 2119 } 2120 2121 check_sum: 2122 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2123 u8 css, cso; 2124 cso = skb_checksum_start_offset(skb); 2125 2126 if (unlikely(cso & 0x1)) { 2127 if (netif_msg_tx_err(adapter)) 2128 dev_err(&adapter->pdev->dev, 2129 "payload offset should not an event number\n"); 2130 return -1; 2131 } else { 2132 css = cso + skb->csum_offset; 2133 2134 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2135 TPD_PLOADOFFSET_SHIFT; 2136 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2137 TPD_CCSUM_OFFSET_SHIFT; 2138 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2139 } 2140 } 2141 return 0; 2142 } 2143 2144 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2145 struct atl1c_tpd_desc *first_tpd, 2146 u32 queue) 2147 { 2148 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue]; 2149 struct atl1c_buffer *buffer_info; 2150 struct atl1c_tpd_desc *tpd; 2151 u16 first_index, index; 2152 2153 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2154 index = first_index; 2155 while (index != tpd_ring->next_to_use) { 2156 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2157 buffer_info = &tpd_ring->buffer_info[index]; 2158 atl1c_clean_buffer(adpt->pdev, buffer_info, 0); 2159 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2160 if (++index == tpd_ring->count) 2161 index = 0; 2162 } 2163 tpd_ring->next_to_use = first_index; 2164 } 2165 2166 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2167 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2168 u32 queue) 2169 { 2170 struct atl1c_tpd_desc *use_tpd = NULL; 2171 struct atl1c_buffer *buffer_info = NULL; 2172 u16 buf_len = skb_headlen(skb); 2173 u16 map_len = 0; 2174 u16 mapped_len = 0; 2175 u16 hdr_len = 0; 2176 u16 nr_frags; 2177 u16 f; 2178 int tso; 2179 2180 nr_frags = skb_shinfo(skb)->nr_frags; 2181 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2182 if (tso) { 2183 /* TSO */ 2184 hdr_len = skb_tcp_all_headers(skb); 2185 map_len = hdr_len; 2186 use_tpd = tpd; 2187 2188 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2189 buffer_info->length = map_len; 2190 buffer_info->dma = dma_map_single(&adapter->pdev->dev, 2191 skb->data, hdr_len, 2192 DMA_TO_DEVICE); 2193 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2194 goto err_dma; 2195 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2196 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2197 ATL1C_PCIMAP_TODEVICE); 2198 mapped_len += map_len; 2199 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2200 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2201 } 2202 2203 if (mapped_len < buf_len) { 2204 /* mapped_len == 0, means we should use the first tpd, 2205 which is given by caller */ 2206 if (mapped_len == 0) 2207 use_tpd = tpd; 2208 else { 2209 use_tpd = atl1c_get_tpd(adapter, queue); 2210 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2211 } 2212 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2213 buffer_info->length = buf_len - mapped_len; 2214 buffer_info->dma = 2215 dma_map_single(&adapter->pdev->dev, 2216 skb->data + mapped_len, 2217 buffer_info->length, DMA_TO_DEVICE); 2218 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2219 goto err_dma; 2220 2221 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2222 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2223 ATL1C_PCIMAP_TODEVICE); 2224 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2225 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2226 } 2227 2228 for (f = 0; f < nr_frags; f++) { 2229 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2230 2231 use_tpd = atl1c_get_tpd(adapter, queue); 2232 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2233 2234 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2235 buffer_info->length = skb_frag_size(frag); 2236 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2237 frag, 0, 2238 buffer_info->length, 2239 DMA_TO_DEVICE); 2240 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2241 goto err_dma; 2242 2243 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2244 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2245 ATL1C_PCIMAP_TODEVICE); 2246 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2247 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2248 } 2249 2250 /* The last tpd */ 2251 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2252 /* The last buffer info contain the skb address, 2253 so it will be free after unmap */ 2254 buffer_info->skb = skb; 2255 2256 return 0; 2257 2258 err_dma: 2259 buffer_info->dma = 0; 2260 buffer_info->length = 0; 2261 return -1; 2262 } 2263 2264 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue) 2265 { 2266 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 2267 2268 AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod, 2269 tpd_ring->next_to_use); 2270 } 2271 2272 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2273 struct net_device *netdev) 2274 { 2275 struct atl1c_adapter *adapter = netdev_priv(netdev); 2276 u32 queue = skb_get_queue_mapping(skb); 2277 struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue); 2278 struct atl1c_tpd_desc *tpd; 2279 u16 tpd_req; 2280 2281 if (test_bit(__AT_DOWN, &adapter->flags)) { 2282 dev_kfree_skb_any(skb); 2283 return NETDEV_TX_OK; 2284 } 2285 2286 tpd_req = atl1c_cal_tpd_req(skb); 2287 2288 if (atl1c_tpd_avail(adapter, queue) < tpd_req) { 2289 /* no enough descriptor, just stop queue */ 2290 atl1c_tx_queue(adapter, queue); 2291 netif_tx_stop_queue(txq); 2292 return NETDEV_TX_BUSY; 2293 } 2294 2295 tpd = atl1c_get_tpd(adapter, queue); 2296 2297 /* do TSO and check sum */ 2298 if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) { 2299 atl1c_tx_queue(adapter, queue); 2300 dev_kfree_skb_any(skb); 2301 return NETDEV_TX_OK; 2302 } 2303 2304 if (unlikely(skb_vlan_tag_present(skb))) { 2305 u16 vlan = skb_vlan_tag_get(skb); 2306 __le16 tag; 2307 2308 vlan = cpu_to_le16(vlan); 2309 AT_VLAN_TO_TAG(vlan, tag); 2310 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2311 tpd->vlan_tag = tag; 2312 } 2313 2314 if (skb_network_offset(skb) != ETH_HLEN) 2315 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2316 2317 if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) { 2318 netif_info(adapter, tx_done, adapter->netdev, 2319 "tx-skb dropped due to dma error\n"); 2320 /* roll back tpd/buffer */ 2321 atl1c_tx_rollback(adapter, tpd, queue); 2322 dev_kfree_skb_any(skb); 2323 } else { 2324 bool more = netdev_xmit_more(); 2325 2326 if (__netdev_tx_sent_queue(txq, skb->len, more)) 2327 atl1c_tx_queue(adapter, queue); 2328 } 2329 2330 return NETDEV_TX_OK; 2331 } 2332 2333 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2334 { 2335 struct net_device *netdev = adapter->netdev; 2336 2337 free_irq(adapter->pdev->irq, netdev); 2338 2339 if (adapter->have_msi) 2340 pci_disable_msi(adapter->pdev); 2341 } 2342 2343 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2344 { 2345 struct pci_dev *pdev = adapter->pdev; 2346 struct net_device *netdev = adapter->netdev; 2347 int flags = 0; 2348 int err = 0; 2349 2350 adapter->have_msi = true; 2351 err = pci_enable_msi(adapter->pdev); 2352 if (err) { 2353 if (netif_msg_ifup(adapter)) 2354 dev_err(&pdev->dev, 2355 "Unable to allocate MSI interrupt Error: %d\n", 2356 err); 2357 adapter->have_msi = false; 2358 } 2359 2360 if (!adapter->have_msi) 2361 flags |= IRQF_SHARED; 2362 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2363 netdev->name, netdev); 2364 if (err) { 2365 if (netif_msg_ifup(adapter)) 2366 dev_err(&pdev->dev, 2367 "Unable to allocate interrupt Error: %d\n", 2368 err); 2369 if (adapter->have_msi) 2370 pci_disable_msi(adapter->pdev); 2371 return err; 2372 } 2373 if (netif_msg_ifup(adapter)) 2374 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2375 return err; 2376 } 2377 2378 2379 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2380 { 2381 int i; 2382 /* release tx-pending skbs and reset tx/rx ring index */ 2383 for (i = 0; i < adapter->tx_queue_count; ++i) 2384 atl1c_clean_tx_ring(adapter, i); 2385 for (i = 0; i < adapter->rx_queue_count; ++i) 2386 atl1c_clean_rx_ring(adapter, i); 2387 } 2388 2389 static int atl1c_up(struct atl1c_adapter *adapter) 2390 { 2391 struct net_device *netdev = adapter->netdev; 2392 int err; 2393 int i; 2394 2395 netif_carrier_off(netdev); 2396 2397 err = atl1c_configure(adapter); 2398 if (unlikely(err)) 2399 goto err_up; 2400 2401 err = atl1c_request_irq(adapter); 2402 if (unlikely(err)) 2403 goto err_up; 2404 2405 atl1c_check_link_status(adapter); 2406 clear_bit(__AT_DOWN, &adapter->flags); 2407 for (i = 0; i < adapter->tx_queue_count; ++i) 2408 napi_enable(&adapter->tpd_ring[i].napi); 2409 for (i = 0; i < adapter->rx_queue_count; ++i) 2410 napi_enable(&adapter->rrd_ring[i].napi); 2411 atl1c_irq_enable(adapter); 2412 netif_start_queue(netdev); 2413 return err; 2414 2415 err_up: 2416 for (i = 0; i < adapter->rx_queue_count; ++i) 2417 atl1c_clean_rx_ring(adapter, i); 2418 return err; 2419 } 2420 2421 static void atl1c_down(struct atl1c_adapter *adapter) 2422 { 2423 struct net_device *netdev = adapter->netdev; 2424 int i; 2425 2426 atl1c_del_timer(adapter); 2427 adapter->work_event = 0; /* clear all event */ 2428 /* signal that we're down so the interrupt handler does not 2429 * reschedule our watchdog timer */ 2430 set_bit(__AT_DOWN, &adapter->flags); 2431 netif_carrier_off(netdev); 2432 for (i = 0; i < adapter->tx_queue_count; ++i) 2433 napi_disable(&adapter->tpd_ring[i].napi); 2434 for (i = 0; i < adapter->rx_queue_count; ++i) 2435 napi_disable(&adapter->rrd_ring[i].napi); 2436 atl1c_irq_disable(adapter); 2437 atl1c_free_irq(adapter); 2438 /* disable ASPM if device inactive */ 2439 atl1c_disable_l0s_l1(&adapter->hw); 2440 /* reset MAC to disable all RX/TX */ 2441 atl1c_reset_mac(&adapter->hw); 2442 msleep(1); 2443 2444 adapter->link_speed = SPEED_0; 2445 adapter->link_duplex = -1; 2446 atl1c_reset_dma_ring(adapter); 2447 } 2448 2449 /** 2450 * atl1c_open - Called when a network interface is made active 2451 * @netdev: network interface device structure 2452 * 2453 * Returns 0 on success, negative value on failure 2454 * 2455 * The open entry point is called when a network interface is made 2456 * active by the system (IFF_UP). At this point all resources needed 2457 * for transmit and receive operations are allocated, the interrupt 2458 * handler is registered with the OS, the watchdog timer is started, 2459 * and the stack is notified that the interface is ready. 2460 */ 2461 static int atl1c_open(struct net_device *netdev) 2462 { 2463 struct atl1c_adapter *adapter = netdev_priv(netdev); 2464 int err; 2465 2466 /* disallow open during test */ 2467 if (test_bit(__AT_TESTING, &adapter->flags)) 2468 return -EBUSY; 2469 2470 /* allocate rx/tx dma buffer & descriptors */ 2471 err = atl1c_setup_ring_resources(adapter); 2472 if (unlikely(err)) 2473 return err; 2474 2475 err = atl1c_up(adapter); 2476 if (unlikely(err)) 2477 goto err_up; 2478 2479 return 0; 2480 2481 err_up: 2482 atl1c_free_irq(adapter); 2483 atl1c_free_ring_resources(adapter); 2484 atl1c_reset_mac(&adapter->hw); 2485 return err; 2486 } 2487 2488 /** 2489 * atl1c_close - Disables a network interface 2490 * @netdev: network interface device structure 2491 * 2492 * Returns 0, this is not allowed to fail 2493 * 2494 * The close entry point is called when an interface is de-activated 2495 * by the OS. The hardware is still under the drivers control, but 2496 * needs to be disabled. A global MAC reset is issued to stop the 2497 * hardware, and all transmit and receive resources are freed. 2498 */ 2499 static int atl1c_close(struct net_device *netdev) 2500 { 2501 struct atl1c_adapter *adapter = netdev_priv(netdev); 2502 2503 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2504 set_bit(__AT_DOWN, &adapter->flags); 2505 cancel_work_sync(&adapter->common_task); 2506 atl1c_down(adapter); 2507 atl1c_free_ring_resources(adapter); 2508 return 0; 2509 } 2510 2511 static int atl1c_suspend(struct device *dev) 2512 { 2513 struct net_device *netdev = dev_get_drvdata(dev); 2514 struct atl1c_adapter *adapter = netdev_priv(netdev); 2515 struct atl1c_hw *hw = &adapter->hw; 2516 u32 wufc = adapter->wol; 2517 2518 atl1c_disable_l0s_l1(hw); 2519 if (netif_running(netdev)) { 2520 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2521 atl1c_down(adapter); 2522 } 2523 netif_device_detach(netdev); 2524 2525 if (wufc) 2526 if (atl1c_phy_to_ps_link(hw) != 0) 2527 dev_dbg(dev, "phy power saving failed"); 2528 2529 atl1c_power_saving(hw, wufc); 2530 2531 return 0; 2532 } 2533 2534 #ifdef CONFIG_PM_SLEEP 2535 static int atl1c_resume(struct device *dev) 2536 { 2537 struct net_device *netdev = dev_get_drvdata(dev); 2538 struct atl1c_adapter *adapter = netdev_priv(netdev); 2539 2540 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2541 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2542 2543 atl1c_phy_reset(&adapter->hw); 2544 atl1c_reset_mac(&adapter->hw); 2545 atl1c_phy_init(&adapter->hw); 2546 2547 netif_device_attach(netdev); 2548 if (netif_running(netdev)) 2549 atl1c_up(adapter); 2550 2551 return 0; 2552 } 2553 #endif 2554 2555 static void atl1c_shutdown(struct pci_dev *pdev) 2556 { 2557 struct net_device *netdev = pci_get_drvdata(pdev); 2558 struct atl1c_adapter *adapter = netdev_priv(netdev); 2559 2560 atl1c_suspend(&pdev->dev); 2561 pci_wake_from_d3(pdev, adapter->wol); 2562 pci_set_power_state(pdev, PCI_D3hot); 2563 } 2564 2565 static const struct net_device_ops atl1c_netdev_ops = { 2566 .ndo_open = atl1c_open, 2567 .ndo_stop = atl1c_close, 2568 .ndo_validate_addr = eth_validate_addr, 2569 .ndo_start_xmit = atl1c_xmit_frame, 2570 .ndo_set_mac_address = atl1c_set_mac_addr, 2571 .ndo_set_rx_mode = atl1c_set_multi, 2572 .ndo_change_mtu = atl1c_change_mtu, 2573 .ndo_fix_features = atl1c_fix_features, 2574 .ndo_set_features = atl1c_set_features, 2575 .ndo_eth_ioctl = atl1c_ioctl, 2576 .ndo_tx_timeout = atl1c_tx_timeout, 2577 .ndo_get_stats = atl1c_get_stats, 2578 #ifdef CONFIG_NET_POLL_CONTROLLER 2579 .ndo_poll_controller = atl1c_netpoll, 2580 #endif 2581 }; 2582 2583 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2584 { 2585 SET_NETDEV_DEV(netdev, &pdev->dev); 2586 pci_set_drvdata(pdev, netdev); 2587 2588 netdev->netdev_ops = &atl1c_netdev_ops; 2589 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2590 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 2591 atl1c_set_ethtool_ops(netdev); 2592 2593 /* TODO: add when ready */ 2594 netdev->hw_features = NETIF_F_SG | 2595 NETIF_F_HW_CSUM | 2596 NETIF_F_HW_VLAN_CTAG_RX | 2597 NETIF_F_TSO | 2598 NETIF_F_TSO6; 2599 netdev->features = netdev->hw_features | 2600 NETIF_F_HW_VLAN_CTAG_TX; 2601 return 0; 2602 } 2603 2604 /** 2605 * atl1c_probe - Device Initialization Routine 2606 * @pdev: PCI device information struct 2607 * @ent: entry in atl1c_pci_tbl 2608 * 2609 * Returns 0 on success, negative on failure 2610 * 2611 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2612 * The OS initialization, configuring of the adapter private structure, 2613 * and a hardware reset occur. 2614 */ 2615 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2616 { 2617 struct net_device *netdev; 2618 struct atl1c_adapter *adapter; 2619 static int cards_found; 2620 u8 __iomem *hw_addr; 2621 enum atl1c_nic_type nic_type; 2622 u32 queue_count = 1; 2623 int err = 0; 2624 int i; 2625 2626 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2627 err = pci_enable_device_mem(pdev); 2628 if (err) 2629 return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n"); 2630 2631 /* 2632 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2633 * shared register for the high 32 bits, so only a single, aligned, 2634 * 4 GB physical address range can be used at a time. 2635 * 2636 * Supporting 64-bit DMA on this hardware is more trouble than it's 2637 * worth. It is far easier to limit to 32-bit DMA than update 2638 * various kernel subsystems to support the mechanics required by a 2639 * fixed-high-32-bit system. 2640 */ 2641 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2642 if (err) { 2643 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2644 goto err_dma; 2645 } 2646 2647 err = pci_request_regions(pdev, atl1c_driver_name); 2648 if (err) { 2649 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2650 goto err_pci_reg; 2651 } 2652 2653 pci_set_master(pdev); 2654 2655 hw_addr = pci_ioremap_bar(pdev, 0); 2656 if (!hw_addr) { 2657 err = -EIO; 2658 dev_err(&pdev->dev, "cannot map device registers\n"); 2659 goto err_ioremap; 2660 } 2661 2662 nic_type = atl1c_get_mac_type(pdev, hw_addr); 2663 if (nic_type == athr_mt) 2664 queue_count = 4; 2665 2666 netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count); 2667 if (netdev == NULL) { 2668 err = -ENOMEM; 2669 goto err_alloc_etherdev; 2670 } 2671 2672 err = atl1c_init_netdev(netdev, pdev); 2673 if (err) { 2674 dev_err(&pdev->dev, "init netdevice failed\n"); 2675 goto err_init_netdev; 2676 } 2677 adapter = netdev_priv(netdev); 2678 adapter->bd_number = cards_found; 2679 adapter->netdev = netdev; 2680 adapter->pdev = pdev; 2681 adapter->hw.adapter = adapter; 2682 adapter->hw.nic_type = nic_type; 2683 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2684 adapter->hw.hw_addr = hw_addr; 2685 adapter->tx_queue_count = queue_count; 2686 adapter->rx_queue_count = queue_count; 2687 2688 /* init mii data */ 2689 adapter->mii.dev = netdev; 2690 adapter->mii.mdio_read = atl1c_mdio_read; 2691 adapter->mii.mdio_write = atl1c_mdio_write; 2692 adapter->mii.phy_id_mask = 0x1f; 2693 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2694 netif_threaded_enable(netdev); 2695 for (i = 0; i < adapter->rx_queue_count; ++i) 2696 netif_napi_add(netdev, &adapter->rrd_ring[i].napi, 2697 atl1c_clean_rx); 2698 for (i = 0; i < adapter->tx_queue_count; ++i) 2699 netif_napi_add_tx(netdev, &adapter->tpd_ring[i].napi, 2700 atl1c_clean_tx); 2701 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2702 /* setup the private structure */ 2703 err = atl1c_sw_init(adapter); 2704 if (err) { 2705 dev_err(&pdev->dev, "net device private data init failed\n"); 2706 goto err_sw_init; 2707 } 2708 /* set max MTU */ 2709 atl1c_set_max_mtu(netdev); 2710 2711 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2712 2713 /* Init GPHY as early as possible due to power saving issue */ 2714 atl1c_phy_reset(&adapter->hw); 2715 2716 err = atl1c_reset_mac(&adapter->hw); 2717 if (err) { 2718 err = -EIO; 2719 goto err_reset; 2720 } 2721 2722 /* reset the controller to 2723 * put the device in a known good starting state */ 2724 err = atl1c_phy_init(&adapter->hw); 2725 if (err) { 2726 err = -EIO; 2727 goto err_reset; 2728 } 2729 if (atl1c_read_mac_addr(&adapter->hw)) { 2730 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2731 netdev->addr_assign_type = NET_ADDR_RANDOM; 2732 } 2733 eth_hw_addr_set(netdev, adapter->hw.mac_addr); 2734 if (netif_msg_probe(adapter)) 2735 dev_dbg(&pdev->dev, "mac address : %pM\n", 2736 adapter->hw.mac_addr); 2737 2738 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2739 INIT_WORK(&adapter->common_task, atl1c_common_task); 2740 adapter->work_event = 0; 2741 err = register_netdev(netdev); 2742 if (err) { 2743 dev_err(&pdev->dev, "register netdevice failed\n"); 2744 goto err_register; 2745 } 2746 2747 cards_found++; 2748 return 0; 2749 2750 err_reset: 2751 err_register: 2752 err_sw_init: 2753 err_init_netdev: 2754 free_netdev(netdev); 2755 err_alloc_etherdev: 2756 iounmap(hw_addr); 2757 err_ioremap: 2758 pci_release_regions(pdev); 2759 err_pci_reg: 2760 err_dma: 2761 pci_disable_device(pdev); 2762 return err; 2763 } 2764 2765 /** 2766 * atl1c_remove - Device Removal Routine 2767 * @pdev: PCI device information struct 2768 * 2769 * atl1c_remove is called by the PCI subsystem to alert the driver 2770 * that it should release a PCI device. The could be caused by a 2771 * Hot-Plug event, or because the driver is going to be removed from 2772 * memory. 2773 */ 2774 static void atl1c_remove(struct pci_dev *pdev) 2775 { 2776 struct net_device *netdev = pci_get_drvdata(pdev); 2777 struct atl1c_adapter *adapter = netdev_priv(netdev); 2778 2779 unregister_netdev(netdev); 2780 /* restore permanent address */ 2781 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2782 atl1c_phy_disable(&adapter->hw); 2783 2784 iounmap(adapter->hw.hw_addr); 2785 2786 pci_release_regions(pdev); 2787 pci_disable_device(pdev); 2788 free_netdev(netdev); 2789 } 2790 2791 /** 2792 * atl1c_io_error_detected - called when PCI error is detected 2793 * @pdev: Pointer to PCI device 2794 * @state: The current pci connection state 2795 * 2796 * This function is called after a PCI bus error affecting 2797 * this device has been detected. 2798 */ 2799 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2800 pci_channel_state_t state) 2801 { 2802 struct net_device *netdev = pci_get_drvdata(pdev); 2803 struct atl1c_adapter *adapter = netdev_priv(netdev); 2804 2805 netif_device_detach(netdev); 2806 2807 if (state == pci_channel_io_perm_failure) 2808 return PCI_ERS_RESULT_DISCONNECT; 2809 2810 if (netif_running(netdev)) 2811 atl1c_down(adapter); 2812 2813 pci_disable_device(pdev); 2814 2815 /* Request a slot reset. */ 2816 return PCI_ERS_RESULT_NEED_RESET; 2817 } 2818 2819 /** 2820 * atl1c_io_slot_reset - called after the pci bus has been reset. 2821 * @pdev: Pointer to PCI device 2822 * 2823 * Restart the card from scratch, as if from a cold-boot. Implementation 2824 * resembles the first-half of the e1000_resume routine. 2825 */ 2826 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2827 { 2828 struct net_device *netdev = pci_get_drvdata(pdev); 2829 struct atl1c_adapter *adapter = netdev_priv(netdev); 2830 2831 if (pci_enable_device(pdev)) { 2832 if (netif_msg_hw(adapter)) 2833 dev_err(&pdev->dev, 2834 "Cannot re-enable PCI device after reset\n"); 2835 return PCI_ERS_RESULT_DISCONNECT; 2836 } 2837 pci_set_master(pdev); 2838 2839 pci_enable_wake(pdev, PCI_D3hot, 0); 2840 pci_enable_wake(pdev, PCI_D3cold, 0); 2841 2842 atl1c_reset_mac(&adapter->hw); 2843 2844 return PCI_ERS_RESULT_RECOVERED; 2845 } 2846 2847 /** 2848 * atl1c_io_resume - called when traffic can start flowing again. 2849 * @pdev: Pointer to PCI device 2850 * 2851 * This callback is called when the error recovery driver tells us that 2852 * its OK to resume normal operation. Implementation resembles the 2853 * second-half of the atl1c_resume routine. 2854 */ 2855 static void atl1c_io_resume(struct pci_dev *pdev) 2856 { 2857 struct net_device *netdev = pci_get_drvdata(pdev); 2858 struct atl1c_adapter *adapter = netdev_priv(netdev); 2859 2860 if (netif_running(netdev)) { 2861 if (atl1c_up(adapter)) { 2862 if (netif_msg_hw(adapter)) 2863 dev_err(&pdev->dev, 2864 "Cannot bring device back up after reset\n"); 2865 return; 2866 } 2867 } 2868 2869 netif_device_attach(netdev); 2870 } 2871 2872 static const struct pci_error_handlers atl1c_err_handler = { 2873 .error_detected = atl1c_io_error_detected, 2874 .slot_reset = atl1c_io_slot_reset, 2875 .resume = atl1c_io_resume, 2876 }; 2877 2878 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2879 2880 static struct pci_driver atl1c_driver = { 2881 .name = atl1c_driver_name, 2882 .id_table = atl1c_pci_tbl, 2883 .probe = atl1c_probe, 2884 .remove = atl1c_remove, 2885 .shutdown = atl1c_shutdown, 2886 .err_handler = &atl1c_err_handler, 2887 .driver.pm = &atl1c_pm_ops, 2888 }; 2889 2890 module_pci_driver(atl1c_driver); 2891