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_irq_reset - reset interrupt confiure on the NIC 212 * @adapter: board private structure 213 */ 214 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter) 215 { 216 atomic_set(&adapter->irq_sem, 1); 217 atl1c_irq_enable(adapter); 218 } 219 220 /* 221 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 222 * of the idle status register until the device is actually idle 223 */ 224 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 225 { 226 int timeout; 227 u32 data; 228 229 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 230 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 231 if ((data & modu_ctrl) == 0) 232 return 0; 233 msleep(1); 234 } 235 return data; 236 } 237 238 /** 239 * atl1c_phy_config - Timer Call-back 240 * @t: timer list containing pointer to netdev cast into an unsigned long 241 */ 242 static void atl1c_phy_config(struct timer_list *t) 243 { 244 struct atl1c_adapter *adapter = from_timer(adapter, t, 245 phy_config_timer); 246 struct atl1c_hw *hw = &adapter->hw; 247 unsigned long flags; 248 249 spin_lock_irqsave(&adapter->mdio_lock, flags); 250 atl1c_restart_autoneg(hw); 251 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 252 } 253 254 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 255 { 256 atl1c_down(adapter); 257 atl1c_up(adapter); 258 clear_bit(__AT_RESETTING, &adapter->flags); 259 } 260 261 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 262 { 263 struct atl1c_hw *hw = &adapter->hw; 264 struct net_device *netdev = adapter->netdev; 265 struct pci_dev *pdev = adapter->pdev; 266 int err; 267 unsigned long flags; 268 u16 speed, duplex; 269 bool link; 270 271 spin_lock_irqsave(&adapter->mdio_lock, flags); 272 link = atl1c_get_link_status(hw); 273 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 274 275 if (!link) { 276 /* link down */ 277 netif_carrier_off(netdev); 278 hw->hibernate = true; 279 if (atl1c_reset_mac(hw) != 0) 280 if (netif_msg_hw(adapter)) 281 dev_warn(&pdev->dev, "reset mac failed\n"); 282 atl1c_set_aspm(hw, SPEED_0); 283 atl1c_post_phy_linkchg(hw, SPEED_0); 284 atl1c_reset_dma_ring(adapter); 285 atl1c_configure(adapter); 286 } else { 287 /* Link Up */ 288 hw->hibernate = false; 289 spin_lock_irqsave(&adapter->mdio_lock, flags); 290 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 291 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 292 if (unlikely(err)) 293 return; 294 /* link result is our setting */ 295 if (adapter->link_speed != speed || 296 adapter->link_duplex != duplex) { 297 adapter->link_speed = speed; 298 adapter->link_duplex = duplex; 299 atl1c_set_aspm(hw, speed); 300 atl1c_post_phy_linkchg(hw, speed); 301 atl1c_start_mac(adapter); 302 if (netif_msg_link(adapter)) 303 dev_info(&pdev->dev, 304 "%s: %s NIC Link is Up<%d Mbps %s>\n", 305 atl1c_driver_name, netdev->name, 306 adapter->link_speed, 307 adapter->link_duplex == FULL_DUPLEX ? 308 "Full Duplex" : "Half Duplex"); 309 } 310 if (!netif_carrier_ok(netdev)) 311 netif_carrier_on(netdev); 312 } 313 } 314 315 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 316 { 317 struct net_device *netdev = adapter->netdev; 318 struct pci_dev *pdev = adapter->pdev; 319 bool link; 320 321 spin_lock(&adapter->mdio_lock); 322 link = atl1c_get_link_status(&adapter->hw); 323 spin_unlock(&adapter->mdio_lock); 324 /* notify upper layer link down ASAP */ 325 if (!link) { 326 if (netif_carrier_ok(netdev)) { 327 /* old link state: Up */ 328 netif_carrier_off(netdev); 329 if (netif_msg_link(adapter)) 330 dev_info(&pdev->dev, 331 "%s: %s NIC Link is Down\n", 332 atl1c_driver_name, netdev->name); 333 adapter->link_speed = SPEED_0; 334 } 335 } 336 337 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 338 schedule_work(&adapter->common_task); 339 } 340 341 static void atl1c_common_task(struct work_struct *work) 342 { 343 struct atl1c_adapter *adapter; 344 struct net_device *netdev; 345 346 adapter = container_of(work, struct atl1c_adapter, common_task); 347 netdev = adapter->netdev; 348 349 if (test_bit(__AT_DOWN, &adapter->flags)) 350 return; 351 352 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 353 netif_device_detach(netdev); 354 atl1c_down(adapter); 355 atl1c_up(adapter); 356 netif_device_attach(netdev); 357 } 358 359 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 360 &adapter->work_event)) { 361 atl1c_irq_disable(adapter); 362 atl1c_check_link_status(adapter); 363 atl1c_irq_enable(adapter); 364 } 365 } 366 367 368 static void atl1c_del_timer(struct atl1c_adapter *adapter) 369 { 370 del_timer_sync(&adapter->phy_config_timer); 371 } 372 373 374 /** 375 * atl1c_tx_timeout - Respond to a Tx Hang 376 * @netdev: network interface device structure 377 * @txqueue: index of hanging tx queue 378 */ 379 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue) 380 { 381 struct atl1c_adapter *adapter = netdev_priv(netdev); 382 383 /* Do the reset outside of interrupt context */ 384 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 385 schedule_work(&adapter->common_task); 386 } 387 388 /** 389 * atl1c_set_multi - Multicast and Promiscuous mode set 390 * @netdev: network interface device structure 391 * 392 * The set_multi entry point is called whenever the multicast address 393 * list or the network interface flags are updated. This routine is 394 * responsible for configuring the hardware for proper multicast, 395 * promiscuous mode, and all-multi behavior. 396 */ 397 static void atl1c_set_multi(struct net_device *netdev) 398 { 399 struct atl1c_adapter *adapter = netdev_priv(netdev); 400 struct atl1c_hw *hw = &adapter->hw; 401 struct netdev_hw_addr *ha; 402 u32 mac_ctrl_data; 403 u32 hash_value; 404 405 /* Check for Promiscuous and All Multicast modes */ 406 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 407 408 if (netdev->flags & IFF_PROMISC) { 409 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 410 } else if (netdev->flags & IFF_ALLMULTI) { 411 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 412 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 413 } else { 414 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 415 } 416 417 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 418 419 /* clear the old settings from the multicast hash table */ 420 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 421 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 422 423 /* comoute mc addresses' hash value ,and put it into hash table */ 424 netdev_for_each_mc_addr(ha, netdev) { 425 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 426 atl1c_hash_set(hw, hash_value); 427 } 428 } 429 430 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 431 { 432 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 433 /* enable VLAN tag insert/strip */ 434 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 435 } else { 436 /* disable VLAN tag insert/strip */ 437 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 438 } 439 } 440 441 static void atl1c_vlan_mode(struct net_device *netdev, 442 netdev_features_t features) 443 { 444 struct atl1c_adapter *adapter = netdev_priv(netdev); 445 struct pci_dev *pdev = adapter->pdev; 446 u32 mac_ctrl_data = 0; 447 448 if (netif_msg_pktdata(adapter)) 449 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 450 451 atl1c_irq_disable(adapter); 452 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 453 __atl1c_vlan_mode(features, &mac_ctrl_data); 454 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 455 atl1c_irq_enable(adapter); 456 } 457 458 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 459 { 460 struct pci_dev *pdev = adapter->pdev; 461 462 if (netif_msg_pktdata(adapter)) 463 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 464 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 465 } 466 467 /** 468 * atl1c_set_mac_addr - Change the Ethernet Address of the NIC 469 * @netdev: network interface device structure 470 * @p: pointer to an address structure 471 * 472 * Returns 0 on success, negative on failure 473 */ 474 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 475 { 476 struct atl1c_adapter *adapter = netdev_priv(netdev); 477 struct sockaddr *addr = p; 478 479 if (!is_valid_ether_addr(addr->sa_data)) 480 return -EADDRNOTAVAIL; 481 482 if (netif_running(netdev)) 483 return -EBUSY; 484 485 eth_hw_addr_set(netdev, addr->sa_data); 486 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 487 488 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 489 490 return 0; 491 } 492 493 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 494 struct net_device *dev) 495 { 496 unsigned int head_size; 497 int mtu = dev->mtu; 498 499 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 500 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 501 502 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD + NET_IP_ALIGN) + 503 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 504 adapter->rx_frag_size = roundup_pow_of_two(head_size); 505 } 506 507 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 508 netdev_features_t features) 509 { 510 struct atl1c_adapter *adapter = netdev_priv(netdev); 511 struct atl1c_hw *hw = &adapter->hw; 512 513 /* 514 * Since there is no support for separate rx/tx vlan accel 515 * enable/disable make sure tx flag is always in same state as rx. 516 */ 517 if (features & NETIF_F_HW_VLAN_CTAG_RX) 518 features |= NETIF_F_HW_VLAN_CTAG_TX; 519 else 520 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 521 522 if (hw->nic_type != athr_mt) { 523 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 524 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 525 } 526 527 return features; 528 } 529 530 static int atl1c_set_features(struct net_device *netdev, 531 netdev_features_t features) 532 { 533 netdev_features_t changed = netdev->features ^ features; 534 535 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 536 atl1c_vlan_mode(netdev, features); 537 538 return 0; 539 } 540 541 static void atl1c_set_max_mtu(struct net_device *netdev) 542 { 543 struct atl1c_adapter *adapter = netdev_priv(netdev); 544 struct atl1c_hw *hw = &adapter->hw; 545 546 switch (hw->nic_type) { 547 /* These (GbE) devices support jumbo packets, max_mtu 6122 */ 548 case athr_l1c: 549 case athr_l1d: 550 case athr_l1d_2: 551 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - 552 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 553 break; 554 case athr_mt: 555 netdev->max_mtu = 9500; 556 break; 557 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */ 558 default: 559 netdev->max_mtu = ETH_DATA_LEN; 560 break; 561 } 562 } 563 564 /** 565 * atl1c_change_mtu - Change the Maximum Transfer Unit 566 * @netdev: network interface device structure 567 * @new_mtu: new value for maximum frame size 568 * 569 * Returns 0 on success, negative on failure 570 */ 571 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 572 { 573 struct atl1c_adapter *adapter = netdev_priv(netdev); 574 575 /* set MTU */ 576 if (netif_running(netdev)) { 577 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 578 msleep(1); 579 netdev->mtu = new_mtu; 580 adapter->hw.max_frame_size = new_mtu; 581 atl1c_set_rxbufsize(adapter, netdev); 582 atl1c_down(adapter); 583 netdev_update_features(netdev); 584 atl1c_up(adapter); 585 clear_bit(__AT_RESETTING, &adapter->flags); 586 } 587 return 0; 588 } 589 590 /* 591 * caller should hold mdio_lock 592 */ 593 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 594 { 595 struct atl1c_adapter *adapter = netdev_priv(netdev); 596 u16 result; 597 598 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 599 return result; 600 } 601 602 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 603 int reg_num, int val) 604 { 605 struct atl1c_adapter *adapter = netdev_priv(netdev); 606 607 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 608 } 609 610 static int atl1c_mii_ioctl(struct net_device *netdev, 611 struct ifreq *ifr, int cmd) 612 { 613 struct atl1c_adapter *adapter = netdev_priv(netdev); 614 struct pci_dev *pdev = adapter->pdev; 615 struct mii_ioctl_data *data = if_mii(ifr); 616 unsigned long flags; 617 int retval = 0; 618 619 if (!netif_running(netdev)) 620 return -EINVAL; 621 622 spin_lock_irqsave(&adapter->mdio_lock, flags); 623 switch (cmd) { 624 case SIOCGMIIPHY: 625 data->phy_id = 0; 626 break; 627 628 case SIOCGMIIREG: 629 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 630 &data->val_out)) { 631 retval = -EIO; 632 goto out; 633 } 634 break; 635 636 case SIOCSMIIREG: 637 if (data->reg_num & ~(0x1F)) { 638 retval = -EFAULT; 639 goto out; 640 } 641 642 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 643 data->reg_num, data->val_in); 644 if (atl1c_write_phy_reg(&adapter->hw, 645 data->reg_num, data->val_in)) { 646 retval = -EIO; 647 goto out; 648 } 649 break; 650 651 default: 652 retval = -EOPNOTSUPP; 653 break; 654 } 655 out: 656 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 657 return retval; 658 } 659 660 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 661 { 662 switch (cmd) { 663 case SIOCGMIIPHY: 664 case SIOCGMIIREG: 665 case SIOCSMIIREG: 666 return atl1c_mii_ioctl(netdev, ifr, cmd); 667 default: 668 return -EOPNOTSUPP; 669 } 670 } 671 672 /** 673 * atl1c_alloc_queues - Allocate memory for all rings 674 * @adapter: board private structure to initialize 675 * 676 */ 677 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 678 { 679 return 0; 680 } 681 682 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev, 683 u8 __iomem *hw_addr) 684 { 685 switch (pdev->device) { 686 case PCI_DEVICE_ID_ATTANSIC_L2C: 687 return athr_l2c; 688 case PCI_DEVICE_ID_ATTANSIC_L1C: 689 return athr_l1c; 690 case PCI_DEVICE_ID_ATHEROS_L2C_B: 691 return athr_l2c_b; 692 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 693 return athr_l2c_b2; 694 case PCI_DEVICE_ID_ATHEROS_L1D: 695 return athr_l1d; 696 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 697 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC) 698 return athr_mt; 699 return athr_l1d_2; 700 default: 701 return athr_l1c; 702 } 703 } 704 705 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 706 { 707 u32 link_ctrl_data; 708 709 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 710 711 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 712 ATL1C_TXQ_MODE_ENHANCE; 713 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 714 ATL1C_ASPM_L1_SUPPORT; 715 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 716 717 if (hw->nic_type == athr_l1c || 718 hw->nic_type == athr_l1d || 719 hw->nic_type == athr_l1d_2) 720 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 721 return 0; 722 } 723 724 struct atl1c_platform_patch { 725 u16 pci_did; 726 u8 pci_revid; 727 u16 subsystem_vid; 728 u16 subsystem_did; 729 u32 patch_flag; 730 #define ATL1C_LINK_PATCH 0x1 731 }; 732 static const struct atl1c_platform_patch plats[] = { 733 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 734 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 735 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 736 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 737 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 738 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 739 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 740 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 741 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 742 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 743 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 744 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 745 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 746 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 747 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 748 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 749 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 750 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 751 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 752 {0}, 753 }; 754 755 static void atl1c_patch_assign(struct atl1c_hw *hw) 756 { 757 struct pci_dev *pdev = hw->adapter->pdev; 758 u32 misc_ctrl; 759 int i = 0; 760 761 hw->msi_lnkpatch = false; 762 763 while (plats[i].pci_did != 0) { 764 if (plats[i].pci_did == hw->device_id && 765 plats[i].pci_revid == hw->revision_id && 766 plats[i].subsystem_vid == hw->subsystem_vendor_id && 767 plats[i].subsystem_did == hw->subsystem_id) { 768 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 769 hw->msi_lnkpatch = true; 770 } 771 i++; 772 } 773 774 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 775 hw->revision_id == L2CB_V21) { 776 /* config access mode */ 777 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 778 REG_PCIE_DEV_MISC_CTRL); 779 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 780 misc_ctrl &= ~0x100; 781 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 782 REG_PCIE_DEV_MISC_CTRL); 783 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 784 } 785 } 786 /** 787 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 788 * @adapter: board private structure to initialize 789 * 790 * atl1c_sw_init initializes the Adapter private data structure. 791 * Fields are initialized based on PCI device information and 792 * OS network device settings (MTU size). 793 */ 794 static int atl1c_sw_init(struct atl1c_adapter *adapter) 795 { 796 struct atl1c_hw *hw = &adapter->hw; 797 struct pci_dev *pdev = adapter->pdev; 798 u32 revision; 799 int i; 800 801 adapter->wol = 0; 802 device_set_wakeup_enable(&pdev->dev, false); 803 adapter->link_speed = SPEED_0; 804 adapter->link_duplex = FULL_DUPLEX; 805 adapter->tpd_ring[0].count = 1024; 806 adapter->rfd_ring[0].count = 512; 807 808 hw->vendor_id = pdev->vendor; 809 hw->device_id = pdev->device; 810 hw->subsystem_vendor_id = pdev->subsystem_vendor; 811 hw->subsystem_id = pdev->subsystem_device; 812 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 813 hw->revision_id = revision & 0xFF; 814 /* before link up, we assume hibernate is true */ 815 hw->hibernate = true; 816 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 817 if (atl1c_setup_mac_funcs(hw) != 0) { 818 dev_err(&pdev->dev, "set mac function pointers failed\n"); 819 return -1; 820 } 821 atl1c_patch_assign(hw); 822 823 hw->intr_mask = IMR_NORMAL_MASK; 824 for (i = 0; i < adapter->tx_queue_count; ++i) 825 hw->intr_mask |= atl1c_qregs[i].tx_isr; 826 for (i = 0; i < adapter->rx_queue_count; ++i) 827 hw->intr_mask |= atl1c_qregs[i].rx_isr; 828 hw->phy_configured = false; 829 hw->preamble_len = 7; 830 hw->max_frame_size = adapter->netdev->mtu; 831 hw->autoneg_advertised = ADVERTISED_Autoneg; 832 hw->indirect_tab = 0xE4E4E4E4; 833 hw->base_cpu = 0; 834 835 hw->ict = 50000; /* 100ms */ 836 hw->smb_timer = 200000; /* 400ms */ 837 hw->rx_imt = 200; 838 hw->tx_imt = 1000; 839 840 hw->tpd_burst = 5; 841 hw->rfd_burst = 8; 842 hw->dma_order = atl1c_dma_ord_out; 843 hw->dmar_block = atl1c_dma_req_1024; 844 845 if (atl1c_alloc_queues(adapter)) { 846 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 847 return -ENOMEM; 848 } 849 /* TODO */ 850 atl1c_set_rxbufsize(adapter, adapter->netdev); 851 atomic_set(&adapter->irq_sem, 1); 852 spin_lock_init(&adapter->mdio_lock); 853 spin_lock_init(&adapter->hw.intr_mask_lock); 854 set_bit(__AT_DOWN, &adapter->flags); 855 856 return 0; 857 } 858 859 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 860 struct atl1c_buffer *buffer_info) 861 { 862 u16 pci_driection; 863 if (buffer_info->flags & ATL1C_BUFFER_FREE) 864 return; 865 if (buffer_info->dma) { 866 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 867 pci_driection = DMA_FROM_DEVICE; 868 else 869 pci_driection = DMA_TO_DEVICE; 870 871 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 872 dma_unmap_single(&pdev->dev, buffer_info->dma, 873 buffer_info->length, pci_driection); 874 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 875 dma_unmap_page(&pdev->dev, buffer_info->dma, 876 buffer_info->length, pci_driection); 877 } 878 if (buffer_info->skb) 879 dev_consume_skb_any(buffer_info->skb); 880 buffer_info->dma = 0; 881 buffer_info->skb = NULL; 882 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 883 } 884 /** 885 * atl1c_clean_tx_ring - Free Tx-skb 886 * @adapter: board private structure 887 * @queue: idx of transmit queue 888 */ 889 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 890 u32 queue) 891 { 892 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 893 struct atl1c_buffer *buffer_info; 894 struct pci_dev *pdev = adapter->pdev; 895 u16 index, ring_count; 896 897 ring_count = tpd_ring->count; 898 for (index = 0; index < ring_count; index++) { 899 buffer_info = &tpd_ring->buffer_info[index]; 900 atl1c_clean_buffer(pdev, buffer_info); 901 } 902 903 netdev_tx_reset_queue(netdev_get_tx_queue(adapter->netdev, queue)); 904 905 /* Zero out Tx-buffers */ 906 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 907 ring_count); 908 atomic_set(&tpd_ring->next_to_clean, 0); 909 tpd_ring->next_to_use = 0; 910 } 911 912 /** 913 * atl1c_clean_rx_ring - Free rx-reservation skbs 914 * @adapter: board private structure 915 * @queue: idx of transmit queue 916 */ 917 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue) 918 { 919 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue]; 920 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue]; 921 struct atl1c_buffer *buffer_info; 922 struct pci_dev *pdev = adapter->pdev; 923 int j; 924 925 for (j = 0; j < rfd_ring->count; j++) { 926 buffer_info = &rfd_ring->buffer_info[j]; 927 atl1c_clean_buffer(pdev, buffer_info); 928 } 929 /* zero out the descriptor ring */ 930 memset(rfd_ring->desc, 0, rfd_ring->size); 931 rfd_ring->next_to_clean = 0; 932 rfd_ring->next_to_use = 0; 933 rrd_ring->next_to_use = 0; 934 rrd_ring->next_to_clean = 0; 935 } 936 937 /* 938 * Read / Write Ptr Initialize: 939 */ 940 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 941 { 942 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 943 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring; 944 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring; 945 struct atl1c_buffer *buffer_info; 946 int i, j; 947 948 for (i = 0; i < adapter->tx_queue_count; i++) { 949 tpd_ring[i].next_to_use = 0; 950 atomic_set(&tpd_ring[i].next_to_clean, 0); 951 buffer_info = tpd_ring[i].buffer_info; 952 for (j = 0; j < tpd_ring->count; j++) 953 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 954 ATL1C_BUFFER_FREE); 955 } 956 for (i = 0; i < adapter->rx_queue_count; i++) { 957 rfd_ring[i].next_to_use = 0; 958 rfd_ring[i].next_to_clean = 0; 959 rrd_ring[i].next_to_use = 0; 960 rrd_ring[i].next_to_clean = 0; 961 for (j = 0; j < rfd_ring[i].count; j++) { 962 buffer_info = &rfd_ring[i].buffer_info[j]; 963 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 964 } 965 } 966 } 967 968 /** 969 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 970 * @adapter: board private structure 971 * 972 * Free all transmit software resources 973 */ 974 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 975 { 976 struct pci_dev *pdev = adapter->pdev; 977 int i; 978 979 dma_free_coherent(&pdev->dev, adapter->ring_header.size, 980 adapter->ring_header.desc, adapter->ring_header.dma); 981 adapter->ring_header.desc = NULL; 982 983 /* Note: just free tdp_ring.buffer_info, 984 * it contain rfd_ring.buffer_info, do not double free 985 */ 986 if (adapter->tpd_ring[0].buffer_info) { 987 kfree(adapter->tpd_ring[0].buffer_info); 988 adapter->tpd_ring[0].buffer_info = NULL; 989 } 990 for (i = 0; i < adapter->rx_queue_count; ++i) { 991 if (adapter->rrd_ring[i].rx_page) { 992 put_page(adapter->rrd_ring[i].rx_page); 993 adapter->rrd_ring[i].rx_page = NULL; 994 } 995 } 996 } 997 998 /** 999 * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources 1000 * @adapter: board private structure 1001 * 1002 * Return 0 on success, negative on failure 1003 */ 1004 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 1005 { 1006 struct pci_dev *pdev = adapter->pdev; 1007 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1008 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring; 1009 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring; 1010 struct atl1c_ring_header *ring_header = &adapter->ring_header; 1011 int tqc = adapter->tx_queue_count; 1012 int rqc = adapter->rx_queue_count; 1013 int size; 1014 int i; 1015 int count = 0; 1016 u32 offset = 0; 1017 1018 /* Even though only one tpd queue is actually used, the "high" 1019 * priority tpd queue also gets initialized 1020 */ 1021 if (tqc == 1) 1022 tqc = 2; 1023 1024 for (i = 1; i < tqc; i++) 1025 tpd_ring[i].count = tpd_ring[0].count; 1026 1027 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc + 1028 rfd_ring->count * rqc); 1029 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 1030 if (unlikely(!tpd_ring->buffer_info)) 1031 goto err_nomem; 1032 1033 for (i = 0; i < tqc; i++) { 1034 tpd_ring[i].adapter = adapter; 1035 tpd_ring[i].num = i; 1036 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count); 1037 count += tpd_ring[i].count; 1038 } 1039 1040 for (i = 0; i < rqc; i++) { 1041 rrd_ring[i].adapter = adapter; 1042 rrd_ring[i].num = i; 1043 rrd_ring[i].count = rfd_ring[0].count; 1044 rfd_ring[i].count = rfd_ring[0].count; 1045 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count); 1046 count += rfd_ring->count; 1047 } 1048 1049 /* 1050 * real ring DMA buffer 1051 * each ring/block may need up to 8 bytes for alignment, hence the 1052 * additional bytes tacked onto the end. 1053 */ 1054 ring_header->size = 1055 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc + 1056 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc + 1057 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc + 1058 8 * 4; 1059 1060 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, 1061 &ring_header->dma, GFP_KERNEL); 1062 if (unlikely(!ring_header->desc)) { 1063 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1064 goto err_nomem; 1065 } 1066 /* init TPD ring */ 1067 1068 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1069 offset = tpd_ring[0].dma - ring_header->dma; 1070 for (i = 0; i < tqc; i++) { 1071 tpd_ring[i].dma = ring_header->dma + offset; 1072 tpd_ring[i].desc = (u8 *)ring_header->desc + offset; 1073 tpd_ring[i].size = 1074 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1075 offset += roundup(tpd_ring[i].size, 8); 1076 } 1077 for (i = 0; i < rqc; i++) { 1078 /* init RFD ring */ 1079 rfd_ring[i].dma = ring_header->dma + offset; 1080 rfd_ring[i].desc = (u8 *)ring_header->desc + offset; 1081 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) * 1082 rfd_ring[i].count; 1083 offset += roundup(rfd_ring[i].size, 8); 1084 1085 /* init RRD ring */ 1086 rrd_ring[i].dma = ring_header->dma + offset; 1087 rrd_ring[i].desc = (u8 *)ring_header->desc + offset; 1088 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) * 1089 rrd_ring[i].count; 1090 offset += roundup(rrd_ring[i].size, 8); 1091 } 1092 1093 return 0; 1094 1095 err_nomem: 1096 kfree(tpd_ring->buffer_info); 1097 return -ENOMEM; 1098 } 1099 1100 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1101 { 1102 struct atl1c_hw *hw = &adapter->hw; 1103 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring; 1104 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring; 1105 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1106 int i; 1107 int tx_queue_count = adapter->tx_queue_count; 1108 1109 if (tx_queue_count == 1) 1110 tx_queue_count = 2; 1111 1112 /* TPD */ 1113 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1114 (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1115 /* just enable normal priority TX queue */ 1116 for (i = 0; i < tx_queue_count; i++) { 1117 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo, 1118 (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK)); 1119 } 1120 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1121 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1122 1123 1124 /* RFD */ 1125 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1126 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1127 for (i = 0; i < adapter->rx_queue_count; i++) { 1128 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo, 1129 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK)); 1130 } 1131 1132 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1133 rfd_ring->count & RFD_RING_SIZE_MASK); 1134 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1135 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1136 1137 /* RRD */ 1138 for (i = 0; i < adapter->rx_queue_count; i++) { 1139 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo, 1140 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK)); 1141 } 1142 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1143 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1144 1145 if (hw->nic_type == athr_l2c_b) { 1146 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1147 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1148 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1149 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1150 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1151 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1152 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1153 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1154 } 1155 /* Load all of base address above */ 1156 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1157 } 1158 1159 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1160 { 1161 struct atl1c_hw *hw = &adapter->hw; 1162 int max_pay_load; 1163 u16 tx_offload_thresh; 1164 u32 txq_ctrl_data; 1165 1166 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1167 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1168 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1169 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1170 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1171 /* 1172 * if BIOS had changed the dam-read-max-length to an invalid value, 1173 * restore it to default value 1174 */ 1175 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1176 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1177 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1178 } 1179 txq_ctrl_data = 1180 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1181 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1182 1183 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1184 } 1185 1186 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1187 { 1188 struct atl1c_hw *hw = &adapter->hw; 1189 u32 rxq_ctrl_data; 1190 1191 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1192 RXQ_RFD_BURST_NUM_SHIFT; 1193 1194 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1195 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1196 1197 /* aspm for gigabit */ 1198 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1199 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1200 ASPM_THRUPUT_LIMIT_100M); 1201 1202 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1203 } 1204 1205 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1206 { 1207 struct atl1c_hw *hw = &adapter->hw; 1208 u32 dma_ctrl_data; 1209 1210 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1211 DMA_CTRL_RREQ_PRI_DATA | 1212 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1213 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1214 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1215 1216 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1217 } 1218 1219 /* 1220 * Stop the mac, transmit and receive units 1221 * hw - Struct containing variables accessed by shared code 1222 * return : 0 or idle status (if error) 1223 */ 1224 static int atl1c_stop_mac(struct atl1c_hw *hw) 1225 { 1226 u32 data; 1227 1228 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1229 data &= ~RXQ_CTRL_EN; 1230 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1231 1232 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1233 data &= ~TXQ_CTRL_EN; 1234 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1235 1236 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1237 1238 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1239 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1240 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1241 1242 return (int)atl1c_wait_until_idle(hw, 1243 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1244 } 1245 1246 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1247 { 1248 struct atl1c_hw *hw = &adapter->hw; 1249 u32 mac, txq, rxq; 1250 1251 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX; 1252 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1253 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1254 1255 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1256 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1257 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1258 1259 txq |= TXQ_CTRL_EN; 1260 rxq |= RXQ_CTRL_EN; 1261 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1262 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1263 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1264 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1265 MAC_CTRL_HASH_ALG_CRC32; 1266 if (hw->mac_duplex) 1267 mac |= MAC_CTRL_DUPLX; 1268 else 1269 mac &= ~MAC_CTRL_DUPLX; 1270 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1271 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1272 1273 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1274 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1275 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1276 } 1277 1278 /* 1279 * Reset the transmit and receive units; mask and clear all interrupts. 1280 * hw - Struct containing variables accessed by shared code 1281 * return : 0 or idle status (if error) 1282 */ 1283 static int atl1c_reset_mac(struct atl1c_hw *hw) 1284 { 1285 struct atl1c_adapter *adapter = hw->adapter; 1286 struct pci_dev *pdev = adapter->pdev; 1287 u32 ctrl_data = 0; 1288 1289 atl1c_stop_mac(hw); 1290 /* 1291 * Issue Soft Reset to the MAC. This will reset the chip's 1292 * transmit, receive, DMA. It will not effect 1293 * the current PCI configuration. The global reset bit is self- 1294 * clearing, and should clear within a microsecond. 1295 */ 1296 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1297 ctrl_data |= MASTER_CTRL_OOB_DIS; 1298 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1299 1300 AT_WRITE_FLUSH(hw); 1301 msleep(10); 1302 /* Wait at least 10ms for All module to be Idle */ 1303 1304 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1305 dev_err(&pdev->dev, 1306 "MAC state machine can't be idle since" 1307 " disabled for 10ms second\n"); 1308 return -1; 1309 } 1310 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1311 1312 /* driver control speed/duplex */ 1313 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1314 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1315 1316 /* clk switch setting */ 1317 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1318 switch (hw->nic_type) { 1319 case athr_l2c_b: 1320 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1321 SERDES_MAC_CLK_SLOWDOWN); 1322 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1323 break; 1324 case athr_l2c_b2: 1325 case athr_l1d_2: 1326 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1327 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1328 break; 1329 default: 1330 break; 1331 } 1332 1333 return 0; 1334 } 1335 1336 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1337 { 1338 u16 ctrl_flags = hw->ctrl_flags; 1339 1340 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1341 atl1c_set_aspm(hw, SPEED_0); 1342 hw->ctrl_flags = ctrl_flags; 1343 } 1344 1345 /* 1346 * Set ASPM state. 1347 * Enable/disable L0s/L1 depend on link state. 1348 */ 1349 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1350 { 1351 u32 pm_ctrl_data; 1352 u32 link_l1_timer; 1353 1354 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1355 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1356 PM_CTRL_ASPM_L0S_EN | 1357 PM_CTRL_MAC_ASPM_CHK); 1358 /* L1 timer */ 1359 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1360 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1361 link_l1_timer = 1362 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1363 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1364 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1365 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1366 } else { 1367 link_l1_timer = hw->nic_type == athr_l2c_b ? 1368 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1369 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1370 link_l1_timer = 1; 1371 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1372 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1373 } 1374 1375 /* L0S/L1 enable */ 1376 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1377 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1378 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1379 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1380 1381 /* l2cb & l1d & l2cb2 & l1d2 */ 1382 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1383 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1384 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1385 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1386 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1387 PM_CTRL_SERDES_PD_EX_L1 | 1388 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_SA_DLY_EN | 1393 PM_CTRL_HOTRST); 1394 /* disable l0s if link down or l2cb */ 1395 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1396 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1397 } else { /* l1c */ 1398 pm_ctrl_data = 1399 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1400 if (link_speed != SPEED_0) { 1401 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1402 PM_CTRL_SERDES_PLL_L1_EN | 1403 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1404 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1405 PM_CTRL_CLK_SWH_L1 | 1406 PM_CTRL_ASPM_L0S_EN | 1407 PM_CTRL_ASPM_L1_EN); 1408 } else { /* link down */ 1409 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1410 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1411 PM_CTRL_SERDES_PLL_L1_EN | 1412 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1413 PM_CTRL_ASPM_L0S_EN); 1414 } 1415 } 1416 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1417 1418 return; 1419 } 1420 1421 /** 1422 * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset 1423 * @adapter: board private structure 1424 * 1425 * Configure the Tx /Rx unit of the MAC after a reset. 1426 */ 1427 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1428 { 1429 struct atl1c_hw *hw = &adapter->hw; 1430 u32 master_ctrl_data = 0; 1431 u32 intr_modrt_data; 1432 u32 data; 1433 1434 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1435 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1436 MASTER_CTRL_RX_ITIMER_EN | 1437 MASTER_CTRL_INT_RDCLR); 1438 /* clear interrupt status */ 1439 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1440 /* Clear any WOL status */ 1441 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1442 /* set Interrupt Clear Timer 1443 * HW will enable self to assert interrupt event to system after 1444 * waiting x-time for software to notify it accept interrupt. 1445 */ 1446 1447 data = CLK_GATING_EN_ALL; 1448 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1449 if (hw->nic_type == athr_l2c_b) 1450 data &= ~CLK_GATING_RXMAC_EN; 1451 } else 1452 data = 0; 1453 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1454 1455 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1456 hw->ict & INT_RETRIG_TIMER_MASK); 1457 1458 atl1c_configure_des_ring(adapter); 1459 1460 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1461 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1462 IRQ_MODRT_TX_TIMER_SHIFT; 1463 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1464 IRQ_MODRT_RX_TIMER_SHIFT; 1465 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1466 master_ctrl_data |= 1467 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1468 } 1469 1470 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1471 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1472 1473 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1474 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1475 1476 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1477 hw->smb_timer & SMB_STAT_TIMER_MASK); 1478 1479 /* set MTU */ 1480 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1481 VLAN_HLEN + ETH_FCS_LEN); 1482 1483 atl1c_configure_tx(adapter); 1484 atl1c_configure_rx(adapter); 1485 atl1c_configure_dma(adapter); 1486 1487 return 0; 1488 } 1489 1490 static int atl1c_configure(struct atl1c_adapter *adapter) 1491 { 1492 struct net_device *netdev = adapter->netdev; 1493 int num; 1494 int i; 1495 1496 if (adapter->hw.nic_type == athr_mt) { 1497 u32 mode; 1498 1499 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode); 1500 if (adapter->rx_queue_count == 4) 1501 mode |= MT_MODE_4Q; 1502 else 1503 mode &= ~MT_MODE_4Q; 1504 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode); 1505 } 1506 1507 atl1c_init_ring_ptrs(adapter); 1508 atl1c_set_multi(netdev); 1509 atl1c_restore_vlan(adapter); 1510 1511 for (i = 0; i < adapter->rx_queue_count; ++i) { 1512 num = atl1c_alloc_rx_buffer(adapter, i, false); 1513 if (unlikely(num == 0)) 1514 return -ENOMEM; 1515 } 1516 1517 if (atl1c_configure_mac(adapter)) 1518 return -EIO; 1519 1520 return 0; 1521 } 1522 1523 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1524 { 1525 u16 hw_reg_addr = 0; 1526 unsigned long *stats_item = NULL; 1527 u32 data; 1528 1529 /* update rx status */ 1530 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1531 stats_item = &adapter->hw_stats.rx_ok; 1532 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1533 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1534 *stats_item += data; 1535 stats_item++; 1536 hw_reg_addr += 4; 1537 } 1538 /* update tx status */ 1539 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1540 stats_item = &adapter->hw_stats.tx_ok; 1541 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1542 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1543 *stats_item += data; 1544 stats_item++; 1545 hw_reg_addr += 4; 1546 } 1547 } 1548 1549 /** 1550 * atl1c_get_stats - Get System Network Statistics 1551 * @netdev: network interface device structure 1552 * 1553 * Returns the address of the device statistics structure. 1554 * The statistics are actually updated from the timer callback. 1555 */ 1556 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1557 { 1558 struct atl1c_adapter *adapter = netdev_priv(netdev); 1559 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1560 struct net_device_stats *net_stats = &netdev->stats; 1561 1562 atl1c_update_hw_stats(adapter); 1563 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1564 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1565 net_stats->multicast = hw_stats->rx_mcast; 1566 net_stats->collisions = hw_stats->tx_1_col + 1567 hw_stats->tx_2_col + 1568 hw_stats->tx_late_col + 1569 hw_stats->tx_abort_col; 1570 1571 net_stats->rx_errors = hw_stats->rx_frag + 1572 hw_stats->rx_fcs_err + 1573 hw_stats->rx_len_err + 1574 hw_stats->rx_sz_ov + 1575 hw_stats->rx_rrd_ov + 1576 hw_stats->rx_align_err + 1577 hw_stats->rx_rxf_ov; 1578 1579 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1580 net_stats->rx_length_errors = hw_stats->rx_len_err; 1581 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1582 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1583 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1584 1585 net_stats->tx_errors = hw_stats->tx_late_col + 1586 hw_stats->tx_abort_col + 1587 hw_stats->tx_underrun + 1588 hw_stats->tx_trunc; 1589 1590 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1591 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1592 net_stats->tx_window_errors = hw_stats->tx_late_col; 1593 1594 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1595 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1596 1597 return net_stats; 1598 } 1599 1600 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1601 { 1602 u16 phy_data; 1603 1604 spin_lock(&adapter->mdio_lock); 1605 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1606 spin_unlock(&adapter->mdio_lock); 1607 } 1608 1609 static int atl1c_clean_tx(struct napi_struct *napi, int budget) 1610 { 1611 struct atl1c_tpd_ring *tpd_ring = 1612 container_of(napi, struct atl1c_tpd_ring, napi); 1613 struct atl1c_adapter *adapter = tpd_ring->adapter; 1614 struct netdev_queue *txq = 1615 netdev_get_tx_queue(napi->dev, tpd_ring->num); 1616 struct atl1c_buffer *buffer_info; 1617 struct pci_dev *pdev = adapter->pdev; 1618 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1619 u16 hw_next_to_clean; 1620 unsigned int total_bytes = 0, total_packets = 0; 1621 unsigned long flags; 1622 1623 AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons, 1624 &hw_next_to_clean); 1625 1626 while (next_to_clean != hw_next_to_clean) { 1627 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1628 if (buffer_info->skb) { 1629 total_bytes += buffer_info->skb->len; 1630 total_packets++; 1631 } 1632 atl1c_clean_buffer(pdev, buffer_info); 1633 if (++next_to_clean == tpd_ring->count) 1634 next_to_clean = 0; 1635 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1636 } 1637 1638 netdev_tx_completed_queue(txq, total_packets, total_bytes); 1639 1640 if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev)) 1641 netif_tx_wake_queue(txq); 1642 1643 if (total_packets < budget) { 1644 napi_complete_done(napi, total_packets); 1645 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1646 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr; 1647 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1648 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1649 return total_packets; 1650 } 1651 return budget; 1652 } 1653 1654 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status) 1655 { 1656 struct atl1c_hw *hw = &adapter->hw; 1657 u32 intr_mask; 1658 int i; 1659 1660 spin_lock(&hw->intr_mask_lock); 1661 intr_mask = hw->intr_mask; 1662 for (i = 0; i < adapter->rx_queue_count; ++i) { 1663 if (!(status & atl1c_qregs[i].rx_isr)) 1664 continue; 1665 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) { 1666 intr_mask &= ~atl1c_qregs[i].rx_isr; 1667 __napi_schedule(&adapter->rrd_ring[i].napi); 1668 } 1669 } 1670 for (i = 0; i < adapter->tx_queue_count; ++i) { 1671 if (!(status & atl1c_qregs[i].tx_isr)) 1672 continue; 1673 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) { 1674 intr_mask &= ~atl1c_qregs[i].tx_isr; 1675 __napi_schedule(&adapter->tpd_ring[i].napi); 1676 } 1677 } 1678 1679 if (hw->intr_mask != intr_mask) { 1680 hw->intr_mask = intr_mask; 1681 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1682 } 1683 spin_unlock(&hw->intr_mask_lock); 1684 } 1685 1686 /** 1687 * atl1c_intr - Interrupt Handler 1688 * @irq: interrupt number 1689 * @data: pointer to a network interface device structure 1690 */ 1691 static irqreturn_t atl1c_intr(int irq, void *data) 1692 { 1693 struct net_device *netdev = data; 1694 struct atl1c_adapter *adapter = netdev_priv(netdev); 1695 struct pci_dev *pdev = adapter->pdev; 1696 struct atl1c_hw *hw = &adapter->hw; 1697 int max_ints = AT_MAX_INT_WORK; 1698 int handled = IRQ_NONE; 1699 u32 status; 1700 u32 reg_data; 1701 1702 do { 1703 AT_READ_REG(hw, REG_ISR, ®_data); 1704 status = reg_data & hw->intr_mask; 1705 1706 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1707 if (max_ints != AT_MAX_INT_WORK) 1708 handled = IRQ_HANDLED; 1709 break; 1710 } 1711 /* link event */ 1712 if (status & ISR_GPHY) 1713 atl1c_clear_phy_int(adapter); 1714 /* Ack ISR */ 1715 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1716 if (status & (ISR_RX_PKT | ISR_TX_PKT)) 1717 atl1c_intr_rx_tx(adapter, status); 1718 1719 handled = IRQ_HANDLED; 1720 /* check if PCIE PHY Link down */ 1721 if (status & ISR_ERROR) { 1722 if (netif_msg_hw(adapter)) 1723 dev_err(&pdev->dev, 1724 "atl1c hardware error (status = 0x%x)\n", 1725 status & ISR_ERROR); 1726 /* reset MAC */ 1727 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1728 schedule_work(&adapter->common_task); 1729 return IRQ_HANDLED; 1730 } 1731 1732 if (status & ISR_OVER) 1733 if (netif_msg_intr(adapter)) 1734 dev_warn(&pdev->dev, 1735 "TX/RX overflow (status = 0x%x)\n", 1736 status & ISR_OVER); 1737 1738 /* link event */ 1739 if (status & (ISR_GPHY | ISR_MANUAL)) { 1740 netdev->stats.tx_carrier_errors++; 1741 atl1c_link_chg_event(adapter); 1742 break; 1743 } 1744 1745 } while (--max_ints > 0); 1746 /* re-enable Interrupt*/ 1747 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1748 return handled; 1749 } 1750 1751 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1752 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1753 { 1754 if (adapter->hw.nic_type == athr_mt) { 1755 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP) 1756 skb->ip_summed = CHECKSUM_UNNECESSARY; 1757 return; 1758 } 1759 /* 1760 * The pid field in RRS in not correct sometimes, so we 1761 * cannot figure out if the packet is fragmented or not, 1762 * so we tell the KERNEL CHECKSUM_NONE 1763 */ 1764 skb_checksum_none_assert(skb); 1765 } 1766 1767 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter, 1768 u32 queue, bool napi_mode) 1769 { 1770 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue]; 1771 struct sk_buff *skb; 1772 struct page *page; 1773 1774 if (adapter->rx_frag_size > PAGE_SIZE) { 1775 if (likely(napi_mode)) 1776 return napi_alloc_skb(&rrd_ring->napi, 1777 adapter->rx_buffer_len); 1778 else 1779 return netdev_alloc_skb_ip_align(adapter->netdev, 1780 adapter->rx_buffer_len); 1781 } 1782 1783 page = rrd_ring->rx_page; 1784 if (!page) { 1785 page = alloc_page(GFP_ATOMIC); 1786 if (unlikely(!page)) 1787 return NULL; 1788 rrd_ring->rx_page = page; 1789 rrd_ring->rx_page_offset = 0; 1790 } 1791 1792 skb = build_skb(page_address(page) + rrd_ring->rx_page_offset, 1793 adapter->rx_frag_size); 1794 if (likely(skb)) { 1795 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); 1796 rrd_ring->rx_page_offset += adapter->rx_frag_size; 1797 if (rrd_ring->rx_page_offset >= PAGE_SIZE) 1798 rrd_ring->rx_page = NULL; 1799 else 1800 get_page(page); 1801 } 1802 return skb; 1803 } 1804 1805 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue, 1806 bool napi_mode) 1807 { 1808 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue]; 1809 struct pci_dev *pdev = adapter->pdev; 1810 struct atl1c_buffer *buffer_info, *next_info; 1811 struct sk_buff *skb; 1812 void *vir_addr = NULL; 1813 u16 num_alloc = 0; 1814 u16 rfd_next_to_use, next_next; 1815 struct atl1c_rx_free_desc *rfd_desc; 1816 dma_addr_t mapping; 1817 1818 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1819 if (++next_next == rfd_ring->count) 1820 next_next = 0; 1821 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1822 next_info = &rfd_ring->buffer_info[next_next]; 1823 1824 while (next_info->flags & ATL1C_BUFFER_FREE) { 1825 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1826 1827 skb = atl1c_alloc_skb(adapter, queue, napi_mode); 1828 if (unlikely(!skb)) { 1829 if (netif_msg_rx_err(adapter)) 1830 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1831 break; 1832 } 1833 1834 /* 1835 * Make buffer alignment 2 beyond a 16 byte boundary 1836 * this will result in a 16 byte aligned IP header after 1837 * the 14 byte MAC header is removed 1838 */ 1839 vir_addr = skb->data; 1840 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1841 buffer_info->skb = skb; 1842 buffer_info->length = adapter->rx_buffer_len; 1843 mapping = dma_map_single(&pdev->dev, vir_addr, 1844 buffer_info->length, DMA_FROM_DEVICE); 1845 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) { 1846 dev_kfree_skb(skb); 1847 buffer_info->skb = NULL; 1848 buffer_info->length = 0; 1849 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1850 netif_warn(adapter, rx_err, adapter->netdev, "RX dma_map_single failed"); 1851 break; 1852 } 1853 buffer_info->dma = mapping; 1854 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1855 ATL1C_PCIMAP_FROMDEVICE); 1856 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1857 rfd_next_to_use = next_next; 1858 if (++next_next == rfd_ring->count) 1859 next_next = 0; 1860 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1861 next_info = &rfd_ring->buffer_info[next_next]; 1862 num_alloc++; 1863 } 1864 1865 if (num_alloc) { 1866 /* TODO: update mailbox here */ 1867 wmb(); 1868 rfd_ring->next_to_use = rfd_next_to_use; 1869 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod, 1870 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1871 } 1872 1873 return num_alloc; 1874 } 1875 1876 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1877 struct atl1c_recv_ret_status *rrs, u16 num) 1878 { 1879 u16 i; 1880 /* the relationship between rrd and rfd is one map one */ 1881 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1882 rrd_ring->next_to_clean)) { 1883 rrs->word3 &= ~RRS_RXD_UPDATED; 1884 if (++rrd_ring->next_to_clean == rrd_ring->count) 1885 rrd_ring->next_to_clean = 0; 1886 } 1887 } 1888 1889 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1890 struct atl1c_recv_ret_status *rrs, u16 num) 1891 { 1892 u16 i; 1893 u16 rfd_index; 1894 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1895 1896 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1897 RRS_RX_RFD_INDEX_MASK; 1898 for (i = 0; i < num; i++) { 1899 buffer_info[rfd_index].skb = NULL; 1900 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1901 ATL1C_BUFFER_FREE); 1902 if (++rfd_index == rfd_ring->count) 1903 rfd_index = 0; 1904 } 1905 rfd_ring->next_to_clean = rfd_index; 1906 } 1907 1908 /** 1909 * atl1c_clean_rx - NAPI Rx polling callback 1910 * @napi: napi info 1911 * @budget: limit of packets to clean 1912 */ 1913 static int atl1c_clean_rx(struct napi_struct *napi, int budget) 1914 { 1915 struct atl1c_rrd_ring *rrd_ring = 1916 container_of(napi, struct atl1c_rrd_ring, napi); 1917 struct atl1c_adapter *adapter = rrd_ring->adapter; 1918 u16 rfd_num, rfd_index; 1919 u16 length; 1920 struct pci_dev *pdev = adapter->pdev; 1921 struct net_device *netdev = adapter->netdev; 1922 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num]; 1923 struct sk_buff *skb; 1924 struct atl1c_recv_ret_status *rrs; 1925 struct atl1c_buffer *buffer_info; 1926 int work_done = 0; 1927 unsigned long flags; 1928 1929 /* Keep link state information with original netdev */ 1930 if (!netif_carrier_ok(adapter->netdev)) 1931 goto quit_polling; 1932 1933 while (1) { 1934 if (work_done >= budget) 1935 break; 1936 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1937 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1938 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1939 RRS_RX_RFD_CNT_MASK; 1940 if (unlikely(rfd_num != 1)) 1941 /* TODO support mul rfd*/ 1942 if (netif_msg_rx_err(adapter)) 1943 dev_warn(&pdev->dev, 1944 "Multi rfd not support yet!\n"); 1945 goto rrs_checked; 1946 } else { 1947 break; 1948 } 1949 rrs_checked: 1950 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1951 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1952 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1953 if (netif_msg_rx_err(adapter)) 1954 dev_warn(&pdev->dev, 1955 "wrong packet! rrs word3 is %x\n", 1956 rrs->word3); 1957 continue; 1958 } 1959 1960 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1961 RRS_PKT_SIZE_MASK); 1962 /* Good Receive */ 1963 if (likely(rfd_num == 1)) { 1964 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1965 RRS_RX_RFD_INDEX_MASK; 1966 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1967 dma_unmap_single(&pdev->dev, buffer_info->dma, 1968 buffer_info->length, DMA_FROM_DEVICE); 1969 skb = buffer_info->skb; 1970 } else { 1971 /* TODO */ 1972 if (netif_msg_rx_err(adapter)) 1973 dev_warn(&pdev->dev, 1974 "Multi rfd not support yet!\n"); 1975 break; 1976 } 1977 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1978 skb_put(skb, length - ETH_FCS_LEN); 1979 skb->protocol = eth_type_trans(skb, netdev); 1980 atl1c_rx_checksum(adapter, skb, rrs); 1981 if (rrs->word3 & RRS_VLAN_INS) { 1982 u16 vlan; 1983 1984 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1985 vlan = le16_to_cpu(vlan); 1986 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1987 } 1988 napi_gro_receive(napi, skb); 1989 1990 work_done++; 1991 } 1992 if (work_done) 1993 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true); 1994 1995 if (work_done < budget) { 1996 quit_polling: 1997 napi_complete_done(napi, work_done); 1998 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1999 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr; 2000 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 2001 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 2002 } 2003 return work_done; 2004 } 2005 2006 #ifdef CONFIG_NET_POLL_CONTROLLER 2007 2008 /* 2009 * Polling 'interrupt' - used by things like netconsole to send skbs 2010 * without having to re-enable interrupts. It's not called while 2011 * the interrupt routine is executing. 2012 */ 2013 static void atl1c_netpoll(struct net_device *netdev) 2014 { 2015 struct atl1c_adapter *adapter = netdev_priv(netdev); 2016 2017 disable_irq(adapter->pdev->irq); 2018 atl1c_intr(adapter->pdev->irq, netdev); 2019 enable_irq(adapter->pdev->irq); 2020 } 2021 #endif 2022 2023 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue) 2024 { 2025 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 2026 u16 next_to_use = 0; 2027 u16 next_to_clean = 0; 2028 2029 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 2030 next_to_use = tpd_ring->next_to_use; 2031 2032 return (u16)(next_to_clean > next_to_use) ? 2033 (next_to_clean - next_to_use - 1) : 2034 (tpd_ring->count + next_to_clean - next_to_use - 1); 2035 } 2036 2037 /* 2038 * get next usable tpd 2039 * Note: should call atl1c_tdp_avail to make sure 2040 * there is enough tpd to use 2041 */ 2042 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 2043 u32 queue) 2044 { 2045 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 2046 struct atl1c_tpd_desc *tpd_desc; 2047 u16 next_to_use = 0; 2048 2049 next_to_use = tpd_ring->next_to_use; 2050 if (++tpd_ring->next_to_use == tpd_ring->count) 2051 tpd_ring->next_to_use = 0; 2052 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 2053 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 2054 return tpd_desc; 2055 } 2056 2057 static struct atl1c_buffer * 2058 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 2059 { 2060 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 2061 2062 return &tpd_ring->buffer_info[tpd - 2063 (struct atl1c_tpd_desc *)tpd_ring->desc]; 2064 } 2065 2066 /* Calculate the transmit packet descript needed*/ 2067 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 2068 { 2069 u16 tpd_req; 2070 u16 proto_hdr_len = 0; 2071 2072 tpd_req = skb_shinfo(skb)->nr_frags + 1; 2073 2074 if (skb_is_gso(skb)) { 2075 proto_hdr_len = skb_tcp_all_headers(skb); 2076 if (proto_hdr_len < skb_headlen(skb)) 2077 tpd_req++; 2078 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 2079 tpd_req++; 2080 } 2081 return tpd_req; 2082 } 2083 2084 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 2085 struct sk_buff *skb, 2086 struct atl1c_tpd_desc **tpd, 2087 u32 queue) 2088 { 2089 struct pci_dev *pdev = adapter->pdev; 2090 unsigned short offload_type; 2091 u8 hdr_len; 2092 u32 real_len; 2093 2094 if (skb_is_gso(skb)) { 2095 int err; 2096 2097 err = skb_cow_head(skb, 0); 2098 if (err < 0) 2099 return err; 2100 2101 offload_type = skb_shinfo(skb)->gso_type; 2102 2103 if (offload_type & SKB_GSO_TCPV4) { 2104 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 2105 + ntohs(ip_hdr(skb)->tot_len)); 2106 2107 if (real_len < skb->len) 2108 pskb_trim(skb, real_len); 2109 2110 hdr_len = skb_tcp_all_headers(skb); 2111 if (unlikely(skb->len == hdr_len)) { 2112 /* only xsum need */ 2113 if (netif_msg_tx_queued(adapter)) 2114 dev_warn(&pdev->dev, 2115 "IPV4 tso with zero data??\n"); 2116 goto check_sum; 2117 } else { 2118 ip_hdr(skb)->check = 0; 2119 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2120 ip_hdr(skb)->saddr, 2121 ip_hdr(skb)->daddr, 2122 0, IPPROTO_TCP, 0); 2123 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2124 } 2125 } 2126 2127 if (offload_type & SKB_GSO_TCPV6) { 2128 struct atl1c_tpd_ext_desc *etpd = 2129 *(struct atl1c_tpd_ext_desc **)(tpd); 2130 2131 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2132 *tpd = atl1c_get_tpd(adapter, queue); 2133 ipv6_hdr(skb)->payload_len = 0; 2134 /* check payload == 0 byte ? */ 2135 hdr_len = skb_tcp_all_headers(skb); 2136 if (unlikely(skb->len == hdr_len)) { 2137 /* only xsum need */ 2138 if (netif_msg_tx_queued(adapter)) 2139 dev_warn(&pdev->dev, 2140 "IPV6 tso with zero data??\n"); 2141 goto check_sum; 2142 } else 2143 tcp_v6_gso_csum_prep(skb); 2144 2145 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2146 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2147 etpd->pkt_len = cpu_to_le32(skb->len); 2148 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2149 } 2150 2151 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2152 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2153 TPD_TCPHDR_OFFSET_SHIFT; 2154 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2155 TPD_MSS_SHIFT; 2156 return 0; 2157 } 2158 2159 check_sum: 2160 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2161 u8 css, cso; 2162 cso = skb_checksum_start_offset(skb); 2163 2164 if (unlikely(cso & 0x1)) { 2165 if (netif_msg_tx_err(adapter)) 2166 dev_err(&adapter->pdev->dev, 2167 "payload offset should not an event number\n"); 2168 return -1; 2169 } else { 2170 css = cso + skb->csum_offset; 2171 2172 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2173 TPD_PLOADOFFSET_SHIFT; 2174 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2175 TPD_CCSUM_OFFSET_SHIFT; 2176 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2177 } 2178 } 2179 return 0; 2180 } 2181 2182 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2183 struct atl1c_tpd_desc *first_tpd, 2184 u32 queue) 2185 { 2186 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue]; 2187 struct atl1c_buffer *buffer_info; 2188 struct atl1c_tpd_desc *tpd; 2189 u16 first_index, index; 2190 2191 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2192 index = first_index; 2193 while (index != tpd_ring->next_to_use) { 2194 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2195 buffer_info = &tpd_ring->buffer_info[index]; 2196 atl1c_clean_buffer(adpt->pdev, buffer_info); 2197 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2198 if (++index == tpd_ring->count) 2199 index = 0; 2200 } 2201 tpd_ring->next_to_use = first_index; 2202 } 2203 2204 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2205 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2206 u32 queue) 2207 { 2208 struct atl1c_tpd_desc *use_tpd = NULL; 2209 struct atl1c_buffer *buffer_info = NULL; 2210 u16 buf_len = skb_headlen(skb); 2211 u16 map_len = 0; 2212 u16 mapped_len = 0; 2213 u16 hdr_len = 0; 2214 u16 nr_frags; 2215 u16 f; 2216 int tso; 2217 2218 nr_frags = skb_shinfo(skb)->nr_frags; 2219 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2220 if (tso) { 2221 /* TSO */ 2222 hdr_len = skb_tcp_all_headers(skb); 2223 map_len = hdr_len; 2224 use_tpd = tpd; 2225 2226 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2227 buffer_info->length = map_len; 2228 buffer_info->dma = dma_map_single(&adapter->pdev->dev, 2229 skb->data, hdr_len, 2230 DMA_TO_DEVICE); 2231 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2232 goto err_dma; 2233 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2234 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2235 ATL1C_PCIMAP_TODEVICE); 2236 mapped_len += map_len; 2237 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2238 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2239 } 2240 2241 if (mapped_len < buf_len) { 2242 /* mapped_len == 0, means we should use the first tpd, 2243 which is given by caller */ 2244 if (mapped_len == 0) 2245 use_tpd = tpd; 2246 else { 2247 use_tpd = atl1c_get_tpd(adapter, queue); 2248 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2249 } 2250 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2251 buffer_info->length = buf_len - mapped_len; 2252 buffer_info->dma = 2253 dma_map_single(&adapter->pdev->dev, 2254 skb->data + mapped_len, 2255 buffer_info->length, DMA_TO_DEVICE); 2256 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2257 goto err_dma; 2258 2259 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2260 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2261 ATL1C_PCIMAP_TODEVICE); 2262 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2263 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2264 } 2265 2266 for (f = 0; f < nr_frags; f++) { 2267 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2268 2269 use_tpd = atl1c_get_tpd(adapter, queue); 2270 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2271 2272 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2273 buffer_info->length = skb_frag_size(frag); 2274 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2275 frag, 0, 2276 buffer_info->length, 2277 DMA_TO_DEVICE); 2278 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2279 goto err_dma; 2280 2281 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2282 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2283 ATL1C_PCIMAP_TODEVICE); 2284 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2285 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2286 } 2287 2288 /* The last tpd */ 2289 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2290 /* The last buffer info contain the skb address, 2291 so it will be free after unmap */ 2292 buffer_info->skb = skb; 2293 2294 return 0; 2295 2296 err_dma: 2297 buffer_info->dma = 0; 2298 buffer_info->length = 0; 2299 return -1; 2300 } 2301 2302 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue) 2303 { 2304 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue]; 2305 2306 AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod, 2307 tpd_ring->next_to_use); 2308 } 2309 2310 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2311 struct net_device *netdev) 2312 { 2313 struct atl1c_adapter *adapter = netdev_priv(netdev); 2314 u32 queue = skb_get_queue_mapping(skb); 2315 struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue); 2316 struct atl1c_tpd_desc *tpd; 2317 u16 tpd_req; 2318 2319 if (test_bit(__AT_DOWN, &adapter->flags)) { 2320 dev_kfree_skb_any(skb); 2321 return NETDEV_TX_OK; 2322 } 2323 2324 tpd_req = atl1c_cal_tpd_req(skb); 2325 2326 if (atl1c_tpd_avail(adapter, queue) < tpd_req) { 2327 /* no enough descriptor, just stop queue */ 2328 atl1c_tx_queue(adapter, queue); 2329 netif_tx_stop_queue(txq); 2330 return NETDEV_TX_BUSY; 2331 } 2332 2333 tpd = atl1c_get_tpd(adapter, queue); 2334 2335 /* do TSO and check sum */ 2336 if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) { 2337 atl1c_tx_queue(adapter, queue); 2338 dev_kfree_skb_any(skb); 2339 return NETDEV_TX_OK; 2340 } 2341 2342 if (unlikely(skb_vlan_tag_present(skb))) { 2343 u16 vlan = skb_vlan_tag_get(skb); 2344 __le16 tag; 2345 2346 vlan = cpu_to_le16(vlan); 2347 AT_VLAN_TO_TAG(vlan, tag); 2348 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2349 tpd->vlan_tag = tag; 2350 } 2351 2352 if (skb_network_offset(skb) != ETH_HLEN) 2353 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2354 2355 if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) { 2356 netif_info(adapter, tx_done, adapter->netdev, 2357 "tx-skb dropped due to dma error\n"); 2358 /* roll back tpd/buffer */ 2359 atl1c_tx_rollback(adapter, tpd, queue); 2360 dev_kfree_skb_any(skb); 2361 } else { 2362 bool more = netdev_xmit_more(); 2363 2364 if (__netdev_tx_sent_queue(txq, skb->len, more)) 2365 atl1c_tx_queue(adapter, queue); 2366 } 2367 2368 return NETDEV_TX_OK; 2369 } 2370 2371 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2372 { 2373 struct net_device *netdev = adapter->netdev; 2374 2375 free_irq(adapter->pdev->irq, netdev); 2376 2377 if (adapter->have_msi) 2378 pci_disable_msi(adapter->pdev); 2379 } 2380 2381 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2382 { 2383 struct pci_dev *pdev = adapter->pdev; 2384 struct net_device *netdev = adapter->netdev; 2385 int flags = 0; 2386 int err = 0; 2387 2388 adapter->have_msi = true; 2389 err = pci_enable_msi(adapter->pdev); 2390 if (err) { 2391 if (netif_msg_ifup(adapter)) 2392 dev_err(&pdev->dev, 2393 "Unable to allocate MSI interrupt Error: %d\n", 2394 err); 2395 adapter->have_msi = false; 2396 } 2397 2398 if (!adapter->have_msi) 2399 flags |= IRQF_SHARED; 2400 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2401 netdev->name, netdev); 2402 if (err) { 2403 if (netif_msg_ifup(adapter)) 2404 dev_err(&pdev->dev, 2405 "Unable to allocate interrupt Error: %d\n", 2406 err); 2407 if (adapter->have_msi) 2408 pci_disable_msi(adapter->pdev); 2409 return err; 2410 } 2411 if (netif_msg_ifup(adapter)) 2412 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2413 return err; 2414 } 2415 2416 2417 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2418 { 2419 int i; 2420 /* release tx-pending skbs and reset tx/rx ring index */ 2421 for (i = 0; i < adapter->tx_queue_count; ++i) 2422 atl1c_clean_tx_ring(adapter, i); 2423 for (i = 0; i < adapter->rx_queue_count; ++i) 2424 atl1c_clean_rx_ring(adapter, i); 2425 } 2426 2427 static int atl1c_up(struct atl1c_adapter *adapter) 2428 { 2429 struct net_device *netdev = adapter->netdev; 2430 int err; 2431 int i; 2432 2433 netif_carrier_off(netdev); 2434 2435 err = atl1c_configure(adapter); 2436 if (unlikely(err)) 2437 goto err_up; 2438 2439 err = atl1c_request_irq(adapter); 2440 if (unlikely(err)) 2441 goto err_up; 2442 2443 atl1c_check_link_status(adapter); 2444 clear_bit(__AT_DOWN, &adapter->flags); 2445 for (i = 0; i < adapter->tx_queue_count; ++i) 2446 napi_enable(&adapter->tpd_ring[i].napi); 2447 for (i = 0; i < adapter->rx_queue_count; ++i) 2448 napi_enable(&adapter->rrd_ring[i].napi); 2449 atl1c_irq_enable(adapter); 2450 netif_start_queue(netdev); 2451 return err; 2452 2453 err_up: 2454 for (i = 0; i < adapter->rx_queue_count; ++i) 2455 atl1c_clean_rx_ring(adapter, i); 2456 return err; 2457 } 2458 2459 static void atl1c_down(struct atl1c_adapter *adapter) 2460 { 2461 struct net_device *netdev = adapter->netdev; 2462 int i; 2463 2464 atl1c_del_timer(adapter); 2465 adapter->work_event = 0; /* clear all event */ 2466 /* signal that we're down so the interrupt handler does not 2467 * reschedule our watchdog timer */ 2468 set_bit(__AT_DOWN, &adapter->flags); 2469 netif_carrier_off(netdev); 2470 for (i = 0; i < adapter->tx_queue_count; ++i) 2471 napi_disable(&adapter->tpd_ring[i].napi); 2472 for (i = 0; i < adapter->rx_queue_count; ++i) 2473 napi_disable(&adapter->rrd_ring[i].napi); 2474 atl1c_irq_disable(adapter); 2475 atl1c_free_irq(adapter); 2476 /* disable ASPM if device inactive */ 2477 atl1c_disable_l0s_l1(&adapter->hw); 2478 /* reset MAC to disable all RX/TX */ 2479 atl1c_reset_mac(&adapter->hw); 2480 msleep(1); 2481 2482 adapter->link_speed = SPEED_0; 2483 adapter->link_duplex = -1; 2484 atl1c_reset_dma_ring(adapter); 2485 } 2486 2487 /** 2488 * atl1c_open - Called when a network interface is made active 2489 * @netdev: network interface device structure 2490 * 2491 * Returns 0 on success, negative value on failure 2492 * 2493 * The open entry point is called when a network interface is made 2494 * active by the system (IFF_UP). At this point all resources needed 2495 * for transmit and receive operations are allocated, the interrupt 2496 * handler is registered with the OS, the watchdog timer is started, 2497 * and the stack is notified that the interface is ready. 2498 */ 2499 static int atl1c_open(struct net_device *netdev) 2500 { 2501 struct atl1c_adapter *adapter = netdev_priv(netdev); 2502 int err; 2503 2504 /* disallow open during test */ 2505 if (test_bit(__AT_TESTING, &adapter->flags)) 2506 return -EBUSY; 2507 2508 /* allocate rx/tx dma buffer & descriptors */ 2509 err = atl1c_setup_ring_resources(adapter); 2510 if (unlikely(err)) 2511 return err; 2512 2513 err = atl1c_up(adapter); 2514 if (unlikely(err)) 2515 goto err_up; 2516 2517 return 0; 2518 2519 err_up: 2520 atl1c_free_irq(adapter); 2521 atl1c_free_ring_resources(adapter); 2522 atl1c_reset_mac(&adapter->hw); 2523 return err; 2524 } 2525 2526 /** 2527 * atl1c_close - Disables a network interface 2528 * @netdev: network interface device structure 2529 * 2530 * Returns 0, this is not allowed to fail 2531 * 2532 * The close entry point is called when an interface is de-activated 2533 * by the OS. The hardware is still under the drivers control, but 2534 * needs to be disabled. A global MAC reset is issued to stop the 2535 * hardware, and all transmit and receive resources are freed. 2536 */ 2537 static int atl1c_close(struct net_device *netdev) 2538 { 2539 struct atl1c_adapter *adapter = netdev_priv(netdev); 2540 2541 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2542 set_bit(__AT_DOWN, &adapter->flags); 2543 cancel_work_sync(&adapter->common_task); 2544 atl1c_down(adapter); 2545 atl1c_free_ring_resources(adapter); 2546 return 0; 2547 } 2548 2549 static int atl1c_suspend(struct device *dev) 2550 { 2551 struct net_device *netdev = dev_get_drvdata(dev); 2552 struct atl1c_adapter *adapter = netdev_priv(netdev); 2553 struct atl1c_hw *hw = &adapter->hw; 2554 u32 wufc = adapter->wol; 2555 2556 atl1c_disable_l0s_l1(hw); 2557 if (netif_running(netdev)) { 2558 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2559 atl1c_down(adapter); 2560 } 2561 netif_device_detach(netdev); 2562 2563 if (wufc) 2564 if (atl1c_phy_to_ps_link(hw) != 0) 2565 dev_dbg(dev, "phy power saving failed"); 2566 2567 atl1c_power_saving(hw, wufc); 2568 2569 return 0; 2570 } 2571 2572 #ifdef CONFIG_PM_SLEEP 2573 static int atl1c_resume(struct device *dev) 2574 { 2575 struct net_device *netdev = dev_get_drvdata(dev); 2576 struct atl1c_adapter *adapter = netdev_priv(netdev); 2577 2578 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2579 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2580 2581 atl1c_phy_reset(&adapter->hw); 2582 atl1c_reset_mac(&adapter->hw); 2583 atl1c_phy_init(&adapter->hw); 2584 2585 netif_device_attach(netdev); 2586 if (netif_running(netdev)) 2587 atl1c_up(adapter); 2588 2589 return 0; 2590 } 2591 #endif 2592 2593 static void atl1c_shutdown(struct pci_dev *pdev) 2594 { 2595 struct net_device *netdev = pci_get_drvdata(pdev); 2596 struct atl1c_adapter *adapter = netdev_priv(netdev); 2597 2598 atl1c_suspend(&pdev->dev); 2599 pci_wake_from_d3(pdev, adapter->wol); 2600 pci_set_power_state(pdev, PCI_D3hot); 2601 } 2602 2603 static const struct net_device_ops atl1c_netdev_ops = { 2604 .ndo_open = atl1c_open, 2605 .ndo_stop = atl1c_close, 2606 .ndo_validate_addr = eth_validate_addr, 2607 .ndo_start_xmit = atl1c_xmit_frame, 2608 .ndo_set_mac_address = atl1c_set_mac_addr, 2609 .ndo_set_rx_mode = atl1c_set_multi, 2610 .ndo_change_mtu = atl1c_change_mtu, 2611 .ndo_fix_features = atl1c_fix_features, 2612 .ndo_set_features = atl1c_set_features, 2613 .ndo_eth_ioctl = atl1c_ioctl, 2614 .ndo_tx_timeout = atl1c_tx_timeout, 2615 .ndo_get_stats = atl1c_get_stats, 2616 #ifdef CONFIG_NET_POLL_CONTROLLER 2617 .ndo_poll_controller = atl1c_netpoll, 2618 #endif 2619 }; 2620 2621 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2622 { 2623 SET_NETDEV_DEV(netdev, &pdev->dev); 2624 pci_set_drvdata(pdev, netdev); 2625 2626 netdev->netdev_ops = &atl1c_netdev_ops; 2627 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2628 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 2629 atl1c_set_ethtool_ops(netdev); 2630 2631 /* TODO: add when ready */ 2632 netdev->hw_features = NETIF_F_SG | 2633 NETIF_F_HW_CSUM | 2634 NETIF_F_HW_VLAN_CTAG_RX | 2635 NETIF_F_TSO | 2636 NETIF_F_TSO6; 2637 netdev->features = netdev->hw_features | 2638 NETIF_F_HW_VLAN_CTAG_TX; 2639 return 0; 2640 } 2641 2642 /** 2643 * atl1c_probe - Device Initialization Routine 2644 * @pdev: PCI device information struct 2645 * @ent: entry in atl1c_pci_tbl 2646 * 2647 * Returns 0 on success, negative on failure 2648 * 2649 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2650 * The OS initialization, configuring of the adapter private structure, 2651 * and a hardware reset occur. 2652 */ 2653 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2654 { 2655 struct net_device *netdev; 2656 struct atl1c_adapter *adapter; 2657 static int cards_found; 2658 u8 __iomem *hw_addr; 2659 enum atl1c_nic_type nic_type; 2660 u32 queue_count = 1; 2661 int err = 0; 2662 int i; 2663 2664 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2665 err = pci_enable_device_mem(pdev); 2666 if (err) 2667 return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n"); 2668 2669 /* 2670 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2671 * shared register for the high 32 bits, so only a single, aligned, 2672 * 4 GB physical address range can be used at a time. 2673 * 2674 * Supporting 64-bit DMA on this hardware is more trouble than it's 2675 * worth. It is far easier to limit to 32-bit DMA than update 2676 * various kernel subsystems to support the mechanics required by a 2677 * fixed-high-32-bit system. 2678 */ 2679 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2680 if (err) { 2681 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2682 goto err_dma; 2683 } 2684 2685 err = pci_request_regions(pdev, atl1c_driver_name); 2686 if (err) { 2687 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2688 goto err_pci_reg; 2689 } 2690 2691 pci_set_master(pdev); 2692 2693 hw_addr = pci_ioremap_bar(pdev, 0); 2694 if (!hw_addr) { 2695 err = -EIO; 2696 dev_err(&pdev->dev, "cannot map device registers\n"); 2697 goto err_ioremap; 2698 } 2699 2700 nic_type = atl1c_get_mac_type(pdev, hw_addr); 2701 if (nic_type == athr_mt) 2702 queue_count = 4; 2703 2704 netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count); 2705 if (netdev == NULL) { 2706 err = -ENOMEM; 2707 goto err_alloc_etherdev; 2708 } 2709 2710 err = atl1c_init_netdev(netdev, pdev); 2711 if (err) { 2712 dev_err(&pdev->dev, "init netdevice failed\n"); 2713 goto err_init_netdev; 2714 } 2715 adapter = netdev_priv(netdev); 2716 adapter->bd_number = cards_found; 2717 adapter->netdev = netdev; 2718 adapter->pdev = pdev; 2719 adapter->hw.adapter = adapter; 2720 adapter->hw.nic_type = nic_type; 2721 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2722 adapter->hw.hw_addr = hw_addr; 2723 adapter->tx_queue_count = queue_count; 2724 adapter->rx_queue_count = queue_count; 2725 2726 /* init mii data */ 2727 adapter->mii.dev = netdev; 2728 adapter->mii.mdio_read = atl1c_mdio_read; 2729 adapter->mii.mdio_write = atl1c_mdio_write; 2730 adapter->mii.phy_id_mask = 0x1f; 2731 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2732 dev_set_threaded(netdev, true); 2733 for (i = 0; i < adapter->rx_queue_count; ++i) 2734 netif_napi_add(netdev, &adapter->rrd_ring[i].napi, 2735 atl1c_clean_rx, 64); 2736 for (i = 0; i < adapter->tx_queue_count; ++i) 2737 netif_napi_add_tx(netdev, &adapter->tpd_ring[i].napi, 2738 atl1c_clean_tx); 2739 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2740 /* setup the private structure */ 2741 err = atl1c_sw_init(adapter); 2742 if (err) { 2743 dev_err(&pdev->dev, "net device private data init failed\n"); 2744 goto err_sw_init; 2745 } 2746 /* set max MTU */ 2747 atl1c_set_max_mtu(netdev); 2748 2749 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2750 2751 /* Init GPHY as early as possible due to power saving issue */ 2752 atl1c_phy_reset(&adapter->hw); 2753 2754 err = atl1c_reset_mac(&adapter->hw); 2755 if (err) { 2756 err = -EIO; 2757 goto err_reset; 2758 } 2759 2760 /* reset the controller to 2761 * put the device in a known good starting state */ 2762 err = atl1c_phy_init(&adapter->hw); 2763 if (err) { 2764 err = -EIO; 2765 goto err_reset; 2766 } 2767 if (atl1c_read_mac_addr(&adapter->hw)) { 2768 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2769 netdev->addr_assign_type = NET_ADDR_RANDOM; 2770 } 2771 eth_hw_addr_set(netdev, adapter->hw.mac_addr); 2772 if (netif_msg_probe(adapter)) 2773 dev_dbg(&pdev->dev, "mac address : %pM\n", 2774 adapter->hw.mac_addr); 2775 2776 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2777 INIT_WORK(&adapter->common_task, atl1c_common_task); 2778 adapter->work_event = 0; 2779 err = register_netdev(netdev); 2780 if (err) { 2781 dev_err(&pdev->dev, "register netdevice failed\n"); 2782 goto err_register; 2783 } 2784 2785 cards_found++; 2786 return 0; 2787 2788 err_reset: 2789 err_register: 2790 err_sw_init: 2791 err_init_netdev: 2792 free_netdev(netdev); 2793 err_alloc_etherdev: 2794 iounmap(hw_addr); 2795 err_ioremap: 2796 pci_release_regions(pdev); 2797 err_pci_reg: 2798 err_dma: 2799 pci_disable_device(pdev); 2800 return err; 2801 } 2802 2803 /** 2804 * atl1c_remove - Device Removal Routine 2805 * @pdev: PCI device information struct 2806 * 2807 * atl1c_remove is called by the PCI subsystem to alert the driver 2808 * that it should release a PCI device. The could be caused by a 2809 * Hot-Plug event, or because the driver is going to be removed from 2810 * memory. 2811 */ 2812 static void atl1c_remove(struct pci_dev *pdev) 2813 { 2814 struct net_device *netdev = pci_get_drvdata(pdev); 2815 struct atl1c_adapter *adapter = netdev_priv(netdev); 2816 2817 unregister_netdev(netdev); 2818 /* restore permanent address */ 2819 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2820 atl1c_phy_disable(&adapter->hw); 2821 2822 iounmap(adapter->hw.hw_addr); 2823 2824 pci_release_regions(pdev); 2825 pci_disable_device(pdev); 2826 free_netdev(netdev); 2827 } 2828 2829 /** 2830 * atl1c_io_error_detected - called when PCI error is detected 2831 * @pdev: Pointer to PCI device 2832 * @state: The current pci connection state 2833 * 2834 * This function is called after a PCI bus error affecting 2835 * this device has been detected. 2836 */ 2837 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2838 pci_channel_state_t state) 2839 { 2840 struct net_device *netdev = pci_get_drvdata(pdev); 2841 struct atl1c_adapter *adapter = netdev_priv(netdev); 2842 2843 netif_device_detach(netdev); 2844 2845 if (state == pci_channel_io_perm_failure) 2846 return PCI_ERS_RESULT_DISCONNECT; 2847 2848 if (netif_running(netdev)) 2849 atl1c_down(adapter); 2850 2851 pci_disable_device(pdev); 2852 2853 /* Request a slot reset. */ 2854 return PCI_ERS_RESULT_NEED_RESET; 2855 } 2856 2857 /** 2858 * atl1c_io_slot_reset - called after the pci bus has been reset. 2859 * @pdev: Pointer to PCI device 2860 * 2861 * Restart the card from scratch, as if from a cold-boot. Implementation 2862 * resembles the first-half of the e1000_resume routine. 2863 */ 2864 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2865 { 2866 struct net_device *netdev = pci_get_drvdata(pdev); 2867 struct atl1c_adapter *adapter = netdev_priv(netdev); 2868 2869 if (pci_enable_device(pdev)) { 2870 if (netif_msg_hw(adapter)) 2871 dev_err(&pdev->dev, 2872 "Cannot re-enable PCI device after reset\n"); 2873 return PCI_ERS_RESULT_DISCONNECT; 2874 } 2875 pci_set_master(pdev); 2876 2877 pci_enable_wake(pdev, PCI_D3hot, 0); 2878 pci_enable_wake(pdev, PCI_D3cold, 0); 2879 2880 atl1c_reset_mac(&adapter->hw); 2881 2882 return PCI_ERS_RESULT_RECOVERED; 2883 } 2884 2885 /** 2886 * atl1c_io_resume - called when traffic can start flowing again. 2887 * @pdev: Pointer to PCI device 2888 * 2889 * This callback is called when the error recovery driver tells us that 2890 * its OK to resume normal operation. Implementation resembles the 2891 * second-half of the atl1c_resume routine. 2892 */ 2893 static void atl1c_io_resume(struct pci_dev *pdev) 2894 { 2895 struct net_device *netdev = pci_get_drvdata(pdev); 2896 struct atl1c_adapter *adapter = netdev_priv(netdev); 2897 2898 if (netif_running(netdev)) { 2899 if (atl1c_up(adapter)) { 2900 if (netif_msg_hw(adapter)) 2901 dev_err(&pdev->dev, 2902 "Cannot bring device back up after reset\n"); 2903 return; 2904 } 2905 } 2906 2907 netif_device_attach(netdev); 2908 } 2909 2910 static const struct pci_error_handlers atl1c_err_handler = { 2911 .error_detected = atl1c_io_error_detected, 2912 .slot_reset = atl1c_io_slot_reset, 2913 .resume = atl1c_io_resume, 2914 }; 2915 2916 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2917 2918 static struct pci_driver atl1c_driver = { 2919 .name = atl1c_driver_name, 2920 .id_table = atl1c_pci_tbl, 2921 .probe = atl1c_probe, 2922 .remove = atl1c_remove, 2923 .shutdown = atl1c_shutdown, 2924 .err_handler = &atl1c_err_handler, 2925 .driver.pm = &atl1c_pm_ops, 2926 }; 2927 2928 module_pci_driver(atl1c_driver); 2929