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., <nic-devel@qualcomm.com>"); 36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver"); 37 MODULE_LICENSE("GPL"); 38 39 static int atl1c_stop_mac(struct atl1c_hw *hw); 40 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw); 41 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed); 42 static void atl1c_start_mac(struct atl1c_adapter *adapter); 43 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 44 int *work_done, int work_to_do); 45 static int atl1c_up(struct atl1c_adapter *adapter); 46 static void atl1c_down(struct atl1c_adapter *adapter); 47 static int atl1c_reset_mac(struct atl1c_hw *hw); 48 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); 49 static int atl1c_configure(struct atl1c_adapter *adapter); 50 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter); 51 52 53 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | 54 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP; 55 static void atl1c_pcie_patch(struct atl1c_hw *hw) 56 { 57 u32 mst_data, data; 58 59 /* pclk sel could switch to 25M */ 60 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data); 61 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS; 62 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data); 63 64 /* WoL/PCIE related settings */ 65 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) { 66 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data); 67 data |= PCIE_PHYMISC_FORCE_RCV_DET; 68 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data); 69 } else { /* new dev set bit5 of MASTER */ 70 if (!(mst_data & MASTER_CTRL_WAKEN_25M)) 71 AT_WRITE_REG(hw, REG_MASTER_CTRL, 72 mst_data | MASTER_CTRL_WAKEN_25M); 73 } 74 /* aspm/PCIE setting only for l2cb 1.0 */ 75 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) { 76 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data); 77 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW, 78 L2CB1_PCIE_PHYMISC2_CDR_BW); 79 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH, 80 L2CB1_PCIE_PHYMISC2_L0S_TH); 81 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data); 82 /* extend L1 sync timer */ 83 AT_READ_REG(hw, REG_LINK_CTRL, &data); 84 data |= LINK_CTRL_EXT_SYNC; 85 AT_WRITE_REG(hw, REG_LINK_CTRL, data); 86 } 87 /* l2cb 1.x & l1d 1.x */ 88 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) { 89 AT_READ_REG(hw, REG_PM_CTRL, &data); 90 data |= PM_CTRL_L0S_BUFSRX_EN; 91 AT_WRITE_REG(hw, REG_PM_CTRL, data); 92 /* clear vendor msg */ 93 AT_READ_REG(hw, REG_DMA_DBG, &data); 94 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG); 95 } 96 } 97 98 /* FIXME: no need any more ? */ 99 /* 100 * atl1c_init_pcie - init PCIE module 101 */ 102 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) 103 { 104 u32 data; 105 u32 pci_cmd; 106 struct pci_dev *pdev = hw->adapter->pdev; 107 int pos; 108 109 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd); 110 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 111 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 112 PCI_COMMAND_IO); 113 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd); 114 115 /* 116 * Clear any PowerSaveing Settings 117 */ 118 pci_enable_wake(pdev, PCI_D3hot, 0); 119 pci_enable_wake(pdev, PCI_D3cold, 0); 120 /* wol sts read-clear */ 121 AT_READ_REG(hw, REG_WOL_CTRL, &data); 122 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 123 124 /* 125 * Mask some pcie error bits 126 */ 127 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 128 if (pos) { 129 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); 130 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); 131 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); 132 } 133 /* clear error status */ 134 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, 135 PCI_EXP_DEVSTA_NFED | 136 PCI_EXP_DEVSTA_FED | 137 PCI_EXP_DEVSTA_CED | 138 PCI_EXP_DEVSTA_URD); 139 140 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data); 141 data &= ~LTSSM_ID_EN_WRO; 142 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data); 143 144 atl1c_pcie_patch(hw); 145 if (flag & ATL1C_PCIE_L0S_L1_DISABLE) 146 atl1c_disable_l0s_l1(hw); 147 148 msleep(5); 149 } 150 151 /** 152 * atl1c_irq_enable - Enable default interrupt generation settings 153 * @adapter: board private structure 154 */ 155 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter) 156 { 157 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 158 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF); 159 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 160 AT_WRITE_FLUSH(&adapter->hw); 161 } 162 } 163 164 /** 165 * atl1c_irq_disable - Mask off interrupt generation on the NIC 166 * @adapter: board private structure 167 */ 168 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter) 169 { 170 atomic_inc(&adapter->irq_sem); 171 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 172 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT); 173 AT_WRITE_FLUSH(&adapter->hw); 174 synchronize_irq(adapter->pdev->irq); 175 } 176 177 /** 178 * atl1c_irq_reset - reset interrupt confiure on the NIC 179 * @adapter: board private structure 180 */ 181 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter) 182 { 183 atomic_set(&adapter->irq_sem, 1); 184 atl1c_irq_enable(adapter); 185 } 186 187 /* 188 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 189 * of the idle status register until the device is actually idle 190 */ 191 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 192 { 193 int timeout; 194 u32 data; 195 196 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 197 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 198 if ((data & modu_ctrl) == 0) 199 return 0; 200 msleep(1); 201 } 202 return data; 203 } 204 205 /** 206 * atl1c_phy_config - Timer Call-back 207 * @data: pointer to netdev cast into an unsigned long 208 */ 209 static void atl1c_phy_config(struct timer_list *t) 210 { 211 struct atl1c_adapter *adapter = from_timer(adapter, t, 212 phy_config_timer); 213 struct atl1c_hw *hw = &adapter->hw; 214 unsigned long flags; 215 216 spin_lock_irqsave(&adapter->mdio_lock, flags); 217 atl1c_restart_autoneg(hw); 218 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 219 } 220 221 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 222 { 223 WARN_ON(in_interrupt()); 224 atl1c_down(adapter); 225 atl1c_up(adapter); 226 clear_bit(__AT_RESETTING, &adapter->flags); 227 } 228 229 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 230 { 231 struct atl1c_hw *hw = &adapter->hw; 232 struct net_device *netdev = adapter->netdev; 233 struct pci_dev *pdev = adapter->pdev; 234 int err; 235 unsigned long flags; 236 u16 speed, duplex, phy_data; 237 238 spin_lock_irqsave(&adapter->mdio_lock, flags); 239 /* MII_BMSR must read twise */ 240 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 241 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 242 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 243 244 if ((phy_data & BMSR_LSTATUS) == 0) { 245 /* link down */ 246 netif_carrier_off(netdev); 247 hw->hibernate = true; 248 if (atl1c_reset_mac(hw) != 0) 249 if (netif_msg_hw(adapter)) 250 dev_warn(&pdev->dev, "reset mac failed\n"); 251 atl1c_set_aspm(hw, SPEED_0); 252 atl1c_post_phy_linkchg(hw, SPEED_0); 253 atl1c_reset_dma_ring(adapter); 254 atl1c_configure(adapter); 255 } else { 256 /* Link Up */ 257 hw->hibernate = false; 258 spin_lock_irqsave(&adapter->mdio_lock, flags); 259 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 260 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 261 if (unlikely(err)) 262 return; 263 /* link result is our setting */ 264 if (adapter->link_speed != speed || 265 adapter->link_duplex != duplex) { 266 adapter->link_speed = speed; 267 adapter->link_duplex = duplex; 268 atl1c_set_aspm(hw, speed); 269 atl1c_post_phy_linkchg(hw, speed); 270 atl1c_start_mac(adapter); 271 if (netif_msg_link(adapter)) 272 dev_info(&pdev->dev, 273 "%s: %s NIC Link is Up<%d Mbps %s>\n", 274 atl1c_driver_name, netdev->name, 275 adapter->link_speed, 276 adapter->link_duplex == FULL_DUPLEX ? 277 "Full Duplex" : "Half Duplex"); 278 } 279 if (!netif_carrier_ok(netdev)) 280 netif_carrier_on(netdev); 281 } 282 } 283 284 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 285 { 286 struct net_device *netdev = adapter->netdev; 287 struct pci_dev *pdev = adapter->pdev; 288 u16 phy_data; 289 u16 link_up; 290 291 spin_lock(&adapter->mdio_lock); 292 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 293 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 294 spin_unlock(&adapter->mdio_lock); 295 link_up = phy_data & BMSR_LSTATUS; 296 /* notify upper layer link down ASAP */ 297 if (!link_up) { 298 if (netif_carrier_ok(netdev)) { 299 /* old link state: Up */ 300 netif_carrier_off(netdev); 301 if (netif_msg_link(adapter)) 302 dev_info(&pdev->dev, 303 "%s: %s NIC Link is Down\n", 304 atl1c_driver_name, netdev->name); 305 adapter->link_speed = SPEED_0; 306 } 307 } 308 309 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 310 schedule_work(&adapter->common_task); 311 } 312 313 static void atl1c_common_task(struct work_struct *work) 314 { 315 struct atl1c_adapter *adapter; 316 struct net_device *netdev; 317 318 adapter = container_of(work, struct atl1c_adapter, common_task); 319 netdev = adapter->netdev; 320 321 if (test_bit(__AT_DOWN, &adapter->flags)) 322 return; 323 324 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 325 netif_device_detach(netdev); 326 atl1c_down(adapter); 327 atl1c_up(adapter); 328 netif_device_attach(netdev); 329 } 330 331 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 332 &adapter->work_event)) { 333 atl1c_irq_disable(adapter); 334 atl1c_check_link_status(adapter); 335 atl1c_irq_enable(adapter); 336 } 337 } 338 339 340 static void atl1c_del_timer(struct atl1c_adapter *adapter) 341 { 342 del_timer_sync(&adapter->phy_config_timer); 343 } 344 345 346 /** 347 * atl1c_tx_timeout - Respond to a Tx Hang 348 * @netdev: network interface device structure 349 */ 350 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue) 351 { 352 struct atl1c_adapter *adapter = netdev_priv(netdev); 353 354 /* Do the reset outside of interrupt context */ 355 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 356 schedule_work(&adapter->common_task); 357 } 358 359 /** 360 * atl1c_set_multi - Multicast and Promiscuous mode set 361 * @netdev: network interface device structure 362 * 363 * The set_multi entry point is called whenever the multicast address 364 * list or the network interface flags are updated. This routine is 365 * responsible for configuring the hardware for proper multicast, 366 * promiscuous mode, and all-multi behavior. 367 */ 368 static void atl1c_set_multi(struct net_device *netdev) 369 { 370 struct atl1c_adapter *adapter = netdev_priv(netdev); 371 struct atl1c_hw *hw = &adapter->hw; 372 struct netdev_hw_addr *ha; 373 u32 mac_ctrl_data; 374 u32 hash_value; 375 376 /* Check for Promiscuous and All Multicast modes */ 377 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 378 379 if (netdev->flags & IFF_PROMISC) { 380 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 381 } else if (netdev->flags & IFF_ALLMULTI) { 382 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 383 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 384 } else { 385 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 386 } 387 388 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 389 390 /* clear the old settings from the multicast hash table */ 391 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 392 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 393 394 /* comoute mc addresses' hash value ,and put it into hash table */ 395 netdev_for_each_mc_addr(ha, netdev) { 396 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 397 atl1c_hash_set(hw, hash_value); 398 } 399 } 400 401 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 402 { 403 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 404 /* enable VLAN tag insert/strip */ 405 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 406 } else { 407 /* disable VLAN tag insert/strip */ 408 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 409 } 410 } 411 412 static void atl1c_vlan_mode(struct net_device *netdev, 413 netdev_features_t features) 414 { 415 struct atl1c_adapter *adapter = netdev_priv(netdev); 416 struct pci_dev *pdev = adapter->pdev; 417 u32 mac_ctrl_data = 0; 418 419 if (netif_msg_pktdata(adapter)) 420 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 421 422 atl1c_irq_disable(adapter); 423 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 424 __atl1c_vlan_mode(features, &mac_ctrl_data); 425 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 426 atl1c_irq_enable(adapter); 427 } 428 429 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 430 { 431 struct pci_dev *pdev = adapter->pdev; 432 433 if (netif_msg_pktdata(adapter)) 434 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 435 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 436 } 437 438 /** 439 * atl1c_set_mac - Change the Ethernet Address of the NIC 440 * @netdev: network interface device structure 441 * @p: pointer to an address structure 442 * 443 * Returns 0 on success, negative on failure 444 */ 445 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 446 { 447 struct atl1c_adapter *adapter = netdev_priv(netdev); 448 struct sockaddr *addr = p; 449 450 if (!is_valid_ether_addr(addr->sa_data)) 451 return -EADDRNOTAVAIL; 452 453 if (netif_running(netdev)) 454 return -EBUSY; 455 456 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 457 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 458 459 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 460 461 return 0; 462 } 463 464 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 465 struct net_device *dev) 466 { 467 unsigned int head_size; 468 int mtu = dev->mtu; 469 470 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 471 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 472 473 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) + 474 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 475 adapter->rx_frag_size = roundup_pow_of_two(head_size); 476 } 477 478 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 479 netdev_features_t features) 480 { 481 /* 482 * Since there is no support for separate rx/tx vlan accel 483 * enable/disable make sure tx flag is always in same state as rx. 484 */ 485 if (features & NETIF_F_HW_VLAN_CTAG_RX) 486 features |= NETIF_F_HW_VLAN_CTAG_TX; 487 else 488 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 489 490 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 491 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 492 493 return features; 494 } 495 496 static int atl1c_set_features(struct net_device *netdev, 497 netdev_features_t features) 498 { 499 netdev_features_t changed = netdev->features ^ features; 500 501 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 502 atl1c_vlan_mode(netdev, features); 503 504 return 0; 505 } 506 507 static void atl1c_set_max_mtu(struct net_device *netdev) 508 { 509 struct atl1c_adapter *adapter = netdev_priv(netdev); 510 struct atl1c_hw *hw = &adapter->hw; 511 512 switch (hw->nic_type) { 513 /* These (GbE) devices support jumbo packets, max_mtu 6122 */ 514 case athr_l1c: 515 case athr_l1d: 516 case athr_l1d_2: 517 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - 518 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 519 break; 520 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */ 521 default: 522 netdev->max_mtu = ETH_DATA_LEN; 523 break; 524 } 525 } 526 527 /** 528 * atl1c_change_mtu - Change the Maximum Transfer Unit 529 * @netdev: network interface device structure 530 * @new_mtu: new value for maximum frame size 531 * 532 * Returns 0 on success, negative on failure 533 */ 534 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 535 { 536 struct atl1c_adapter *adapter = netdev_priv(netdev); 537 538 /* set MTU */ 539 if (netif_running(netdev)) { 540 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 541 msleep(1); 542 netdev->mtu = new_mtu; 543 adapter->hw.max_frame_size = new_mtu; 544 atl1c_set_rxbufsize(adapter, netdev); 545 atl1c_down(adapter); 546 netdev_update_features(netdev); 547 atl1c_up(adapter); 548 clear_bit(__AT_RESETTING, &adapter->flags); 549 } 550 return 0; 551 } 552 553 /* 554 * caller should hold mdio_lock 555 */ 556 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 557 { 558 struct atl1c_adapter *adapter = netdev_priv(netdev); 559 u16 result; 560 561 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 562 return result; 563 } 564 565 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 566 int reg_num, int val) 567 { 568 struct atl1c_adapter *adapter = netdev_priv(netdev); 569 570 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 571 } 572 573 static int atl1c_mii_ioctl(struct net_device *netdev, 574 struct ifreq *ifr, int cmd) 575 { 576 struct atl1c_adapter *adapter = netdev_priv(netdev); 577 struct pci_dev *pdev = adapter->pdev; 578 struct mii_ioctl_data *data = if_mii(ifr); 579 unsigned long flags; 580 int retval = 0; 581 582 if (!netif_running(netdev)) 583 return -EINVAL; 584 585 spin_lock_irqsave(&adapter->mdio_lock, flags); 586 switch (cmd) { 587 case SIOCGMIIPHY: 588 data->phy_id = 0; 589 break; 590 591 case SIOCGMIIREG: 592 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 593 &data->val_out)) { 594 retval = -EIO; 595 goto out; 596 } 597 break; 598 599 case SIOCSMIIREG: 600 if (data->reg_num & ~(0x1F)) { 601 retval = -EFAULT; 602 goto out; 603 } 604 605 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 606 data->reg_num, data->val_in); 607 if (atl1c_write_phy_reg(&adapter->hw, 608 data->reg_num, data->val_in)) { 609 retval = -EIO; 610 goto out; 611 } 612 break; 613 614 default: 615 retval = -EOPNOTSUPP; 616 break; 617 } 618 out: 619 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 620 return retval; 621 } 622 623 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 624 { 625 switch (cmd) { 626 case SIOCGMIIPHY: 627 case SIOCGMIIREG: 628 case SIOCSMIIREG: 629 return atl1c_mii_ioctl(netdev, ifr, cmd); 630 default: 631 return -EOPNOTSUPP; 632 } 633 } 634 635 /** 636 * atl1c_alloc_queues - Allocate memory for all rings 637 * @adapter: board private structure to initialize 638 * 639 */ 640 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 641 { 642 return 0; 643 } 644 645 static void atl1c_set_mac_type(struct atl1c_hw *hw) 646 { 647 switch (hw->device_id) { 648 case PCI_DEVICE_ID_ATTANSIC_L2C: 649 hw->nic_type = athr_l2c; 650 break; 651 case PCI_DEVICE_ID_ATTANSIC_L1C: 652 hw->nic_type = athr_l1c; 653 break; 654 case PCI_DEVICE_ID_ATHEROS_L2C_B: 655 hw->nic_type = athr_l2c_b; 656 break; 657 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 658 hw->nic_type = athr_l2c_b2; 659 break; 660 case PCI_DEVICE_ID_ATHEROS_L1D: 661 hw->nic_type = athr_l1d; 662 break; 663 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 664 hw->nic_type = athr_l1d_2; 665 break; 666 default: 667 break; 668 } 669 } 670 671 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 672 { 673 u32 link_ctrl_data; 674 675 atl1c_set_mac_type(hw); 676 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 677 678 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 679 ATL1C_TXQ_MODE_ENHANCE; 680 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 681 ATL1C_ASPM_L1_SUPPORT; 682 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 683 684 if (hw->nic_type == athr_l1c || 685 hw->nic_type == athr_l1d || 686 hw->nic_type == athr_l1d_2) 687 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 688 return 0; 689 } 690 691 struct atl1c_platform_patch { 692 u16 pci_did; 693 u8 pci_revid; 694 u16 subsystem_vid; 695 u16 subsystem_did; 696 u32 patch_flag; 697 #define ATL1C_LINK_PATCH 0x1 698 }; 699 static const struct atl1c_platform_patch plats[] = { 700 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 701 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 702 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 703 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 704 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 705 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 706 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 707 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 708 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 709 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 710 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 711 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 712 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 713 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 714 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 715 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 716 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 717 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 718 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 719 {0}, 720 }; 721 722 static void atl1c_patch_assign(struct atl1c_hw *hw) 723 { 724 struct pci_dev *pdev = hw->adapter->pdev; 725 u32 misc_ctrl; 726 int i = 0; 727 728 hw->msi_lnkpatch = false; 729 730 while (plats[i].pci_did != 0) { 731 if (plats[i].pci_did == hw->device_id && 732 plats[i].pci_revid == hw->revision_id && 733 plats[i].subsystem_vid == hw->subsystem_vendor_id && 734 plats[i].subsystem_did == hw->subsystem_id) { 735 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 736 hw->msi_lnkpatch = true; 737 } 738 i++; 739 } 740 741 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 742 hw->revision_id == L2CB_V21) { 743 /* config access mode */ 744 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 745 REG_PCIE_DEV_MISC_CTRL); 746 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 747 misc_ctrl &= ~0x100; 748 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 749 REG_PCIE_DEV_MISC_CTRL); 750 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 751 } 752 } 753 /** 754 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 755 * @adapter: board private structure to initialize 756 * 757 * atl1c_sw_init initializes the Adapter private data structure. 758 * Fields are initialized based on PCI device information and 759 * OS network device settings (MTU size). 760 */ 761 static int atl1c_sw_init(struct atl1c_adapter *adapter) 762 { 763 struct atl1c_hw *hw = &adapter->hw; 764 struct pci_dev *pdev = adapter->pdev; 765 u32 revision; 766 767 768 adapter->wol = 0; 769 device_set_wakeup_enable(&pdev->dev, false); 770 adapter->link_speed = SPEED_0; 771 adapter->link_duplex = FULL_DUPLEX; 772 adapter->tpd_ring[0].count = 1024; 773 adapter->rfd_ring.count = 512; 774 775 hw->vendor_id = pdev->vendor; 776 hw->device_id = pdev->device; 777 hw->subsystem_vendor_id = pdev->subsystem_vendor; 778 hw->subsystem_id = pdev->subsystem_device; 779 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 780 hw->revision_id = revision & 0xFF; 781 /* before link up, we assume hibernate is true */ 782 hw->hibernate = true; 783 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 784 if (atl1c_setup_mac_funcs(hw) != 0) { 785 dev_err(&pdev->dev, "set mac function pointers failed\n"); 786 return -1; 787 } 788 atl1c_patch_assign(hw); 789 790 hw->intr_mask = IMR_NORMAL_MASK; 791 hw->phy_configured = false; 792 hw->preamble_len = 7; 793 hw->max_frame_size = adapter->netdev->mtu; 794 hw->autoneg_advertised = ADVERTISED_Autoneg; 795 hw->indirect_tab = 0xE4E4E4E4; 796 hw->base_cpu = 0; 797 798 hw->ict = 50000; /* 100ms */ 799 hw->smb_timer = 200000; /* 400ms */ 800 hw->rx_imt = 200; 801 hw->tx_imt = 1000; 802 803 hw->tpd_burst = 5; 804 hw->rfd_burst = 8; 805 hw->dma_order = atl1c_dma_ord_out; 806 hw->dmar_block = atl1c_dma_req_1024; 807 808 if (atl1c_alloc_queues(adapter)) { 809 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 810 return -ENOMEM; 811 } 812 /* TODO */ 813 atl1c_set_rxbufsize(adapter, adapter->netdev); 814 atomic_set(&adapter->irq_sem, 1); 815 spin_lock_init(&adapter->mdio_lock); 816 set_bit(__AT_DOWN, &adapter->flags); 817 818 return 0; 819 } 820 821 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 822 struct atl1c_buffer *buffer_info) 823 { 824 u16 pci_driection; 825 if (buffer_info->flags & ATL1C_BUFFER_FREE) 826 return; 827 if (buffer_info->dma) { 828 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 829 pci_driection = DMA_FROM_DEVICE; 830 else 831 pci_driection = DMA_TO_DEVICE; 832 833 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 834 dma_unmap_single(&pdev->dev, buffer_info->dma, 835 buffer_info->length, pci_driection); 836 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 837 dma_unmap_page(&pdev->dev, buffer_info->dma, 838 buffer_info->length, pci_driection); 839 } 840 if (buffer_info->skb) 841 dev_consume_skb_any(buffer_info->skb); 842 buffer_info->dma = 0; 843 buffer_info->skb = NULL; 844 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 845 } 846 /** 847 * atl1c_clean_tx_ring - Free Tx-skb 848 * @adapter: board private structure 849 */ 850 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 851 enum atl1c_trans_queue type) 852 { 853 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 854 struct atl1c_buffer *buffer_info; 855 struct pci_dev *pdev = adapter->pdev; 856 u16 index, ring_count; 857 858 ring_count = tpd_ring->count; 859 for (index = 0; index < ring_count; index++) { 860 buffer_info = &tpd_ring->buffer_info[index]; 861 atl1c_clean_buffer(pdev, buffer_info); 862 } 863 864 netdev_reset_queue(adapter->netdev); 865 866 /* Zero out Tx-buffers */ 867 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 868 ring_count); 869 atomic_set(&tpd_ring->next_to_clean, 0); 870 tpd_ring->next_to_use = 0; 871 } 872 873 /** 874 * atl1c_clean_rx_ring - Free rx-reservation skbs 875 * @adapter: board private structure 876 */ 877 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 878 { 879 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 880 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 881 struct atl1c_buffer *buffer_info; 882 struct pci_dev *pdev = adapter->pdev; 883 int j; 884 885 for (j = 0; j < rfd_ring->count; j++) { 886 buffer_info = &rfd_ring->buffer_info[j]; 887 atl1c_clean_buffer(pdev, buffer_info); 888 } 889 /* zero out the descriptor ring */ 890 memset(rfd_ring->desc, 0, rfd_ring->size); 891 rfd_ring->next_to_clean = 0; 892 rfd_ring->next_to_use = 0; 893 rrd_ring->next_to_use = 0; 894 rrd_ring->next_to_clean = 0; 895 } 896 897 /* 898 * Read / Write Ptr Initialize: 899 */ 900 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 901 { 902 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 903 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 904 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 905 struct atl1c_buffer *buffer_info; 906 int i, j; 907 908 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 909 tpd_ring[i].next_to_use = 0; 910 atomic_set(&tpd_ring[i].next_to_clean, 0); 911 buffer_info = tpd_ring[i].buffer_info; 912 for (j = 0; j < tpd_ring->count; j++) 913 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 914 ATL1C_BUFFER_FREE); 915 } 916 rfd_ring->next_to_use = 0; 917 rfd_ring->next_to_clean = 0; 918 rrd_ring->next_to_use = 0; 919 rrd_ring->next_to_clean = 0; 920 for (j = 0; j < rfd_ring->count; j++) { 921 buffer_info = &rfd_ring->buffer_info[j]; 922 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 923 } 924 } 925 926 /** 927 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 928 * @adapter: board private structure 929 * 930 * Free all transmit software resources 931 */ 932 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 933 { 934 struct pci_dev *pdev = adapter->pdev; 935 936 dma_free_coherent(&pdev->dev, adapter->ring_header.size, 937 adapter->ring_header.desc, adapter->ring_header.dma); 938 adapter->ring_header.desc = NULL; 939 940 /* Note: just free tdp_ring.buffer_info, 941 * it contain rfd_ring.buffer_info, do not double free */ 942 if (adapter->tpd_ring[0].buffer_info) { 943 kfree(adapter->tpd_ring[0].buffer_info); 944 adapter->tpd_ring[0].buffer_info = NULL; 945 } 946 if (adapter->rx_page) { 947 put_page(adapter->rx_page); 948 adapter->rx_page = NULL; 949 } 950 } 951 952 /** 953 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources 954 * @adapter: board private structure 955 * 956 * Return 0 on success, negative on failure 957 */ 958 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 959 { 960 struct pci_dev *pdev = adapter->pdev; 961 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 962 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 963 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 964 struct atl1c_ring_header *ring_header = &adapter->ring_header; 965 int size; 966 int i; 967 int count = 0; 968 int rx_desc_count = 0; 969 u32 offset = 0; 970 971 rrd_ring->count = rfd_ring->count; 972 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 973 tpd_ring[i].count = tpd_ring[0].count; 974 975 /* 2 tpd queue, one high priority queue, 976 * another normal priority queue */ 977 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 978 rfd_ring->count); 979 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 980 if (unlikely(!tpd_ring->buffer_info)) 981 goto err_nomem; 982 983 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 984 tpd_ring[i].buffer_info = 985 (tpd_ring->buffer_info + count); 986 count += tpd_ring[i].count; 987 } 988 989 rfd_ring->buffer_info = 990 (tpd_ring->buffer_info + count); 991 count += rfd_ring->count; 992 rx_desc_count += rfd_ring->count; 993 994 /* 995 * real ring DMA buffer 996 * each ring/block may need up to 8 bytes for alignment, hence the 997 * additional bytes tacked onto the end. 998 */ 999 ring_header->size = size = 1000 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1001 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1002 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1003 8 * 4; 1004 1005 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, 1006 &ring_header->dma, GFP_KERNEL); 1007 if (unlikely(!ring_header->desc)) { 1008 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1009 goto err_nomem; 1010 } 1011 /* init TPD ring */ 1012 1013 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1014 offset = tpd_ring[0].dma - ring_header->dma; 1015 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1016 tpd_ring[i].dma = ring_header->dma + offset; 1017 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1018 tpd_ring[i].size = 1019 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1020 offset += roundup(tpd_ring[i].size, 8); 1021 } 1022 /* init RFD ring */ 1023 rfd_ring->dma = ring_header->dma + offset; 1024 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1025 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1026 offset += roundup(rfd_ring->size, 8); 1027 1028 /* init RRD ring */ 1029 rrd_ring->dma = ring_header->dma + offset; 1030 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1031 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1032 rrd_ring->count; 1033 offset += roundup(rrd_ring->size, 8); 1034 1035 return 0; 1036 1037 err_nomem: 1038 kfree(tpd_ring->buffer_info); 1039 return -ENOMEM; 1040 } 1041 1042 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1043 { 1044 struct atl1c_hw *hw = &adapter->hw; 1045 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1046 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1047 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1048 adapter->tpd_ring; 1049 1050 /* TPD */ 1051 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1052 (u32)((tpd_ring[atl1c_trans_normal].dma & 1053 AT_DMA_HI_ADDR_MASK) >> 32)); 1054 /* just enable normal priority TX queue */ 1055 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1056 (u32)(tpd_ring[atl1c_trans_normal].dma & 1057 AT_DMA_LO_ADDR_MASK)); 1058 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1059 (u32)(tpd_ring[atl1c_trans_high].dma & 1060 AT_DMA_LO_ADDR_MASK)); 1061 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1062 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1063 1064 1065 /* RFD */ 1066 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1067 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1068 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1069 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1070 1071 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1072 rfd_ring->count & RFD_RING_SIZE_MASK); 1073 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1074 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1075 1076 /* RRD */ 1077 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1078 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1079 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1080 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1081 1082 if (hw->nic_type == athr_l2c_b) { 1083 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1084 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1085 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1086 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1087 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1088 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1089 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1090 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1091 } 1092 /* Load all of base address above */ 1093 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1094 } 1095 1096 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1097 { 1098 struct atl1c_hw *hw = &adapter->hw; 1099 int max_pay_load; 1100 u16 tx_offload_thresh; 1101 u32 txq_ctrl_data; 1102 1103 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1104 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1105 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1106 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1107 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1108 /* 1109 * if BIOS had changed the dam-read-max-length to an invalid value, 1110 * restore it to default value 1111 */ 1112 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1113 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1114 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1115 } 1116 txq_ctrl_data = 1117 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1118 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1119 1120 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1121 } 1122 1123 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1124 { 1125 struct atl1c_hw *hw = &adapter->hw; 1126 u32 rxq_ctrl_data; 1127 1128 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1129 RXQ_RFD_BURST_NUM_SHIFT; 1130 1131 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1132 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1133 1134 /* aspm for gigabit */ 1135 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1136 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1137 ASPM_THRUPUT_LIMIT_100M); 1138 1139 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1140 } 1141 1142 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1143 { 1144 struct atl1c_hw *hw = &adapter->hw; 1145 u32 dma_ctrl_data; 1146 1147 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1148 DMA_CTRL_RREQ_PRI_DATA | 1149 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1150 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1151 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1152 1153 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1154 } 1155 1156 /* 1157 * Stop the mac, transmit and receive units 1158 * hw - Struct containing variables accessed by shared code 1159 * return : 0 or idle status (if error) 1160 */ 1161 static int atl1c_stop_mac(struct atl1c_hw *hw) 1162 { 1163 u32 data; 1164 1165 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1166 data &= ~RXQ_CTRL_EN; 1167 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1168 1169 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1170 data &= ~TXQ_CTRL_EN; 1171 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1172 1173 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1174 1175 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1176 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1177 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1178 1179 return (int)atl1c_wait_until_idle(hw, 1180 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1181 } 1182 1183 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1184 { 1185 struct atl1c_hw *hw = &adapter->hw; 1186 u32 mac, txq, rxq; 1187 1188 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX; 1189 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1190 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1191 1192 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1193 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1194 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1195 1196 txq |= TXQ_CTRL_EN; 1197 rxq |= RXQ_CTRL_EN; 1198 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1199 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1200 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1201 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1202 MAC_CTRL_HASH_ALG_CRC32; 1203 if (hw->mac_duplex) 1204 mac |= MAC_CTRL_DUPLX; 1205 else 1206 mac &= ~MAC_CTRL_DUPLX; 1207 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1208 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1209 1210 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1211 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1212 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1213 } 1214 1215 /* 1216 * Reset the transmit and receive units; mask and clear all interrupts. 1217 * hw - Struct containing variables accessed by shared code 1218 * return : 0 or idle status (if error) 1219 */ 1220 static int atl1c_reset_mac(struct atl1c_hw *hw) 1221 { 1222 struct atl1c_adapter *adapter = hw->adapter; 1223 struct pci_dev *pdev = adapter->pdev; 1224 u32 ctrl_data = 0; 1225 1226 atl1c_stop_mac(hw); 1227 /* 1228 * Issue Soft Reset to the MAC. This will reset the chip's 1229 * transmit, receive, DMA. It will not effect 1230 * the current PCI configuration. The global reset bit is self- 1231 * clearing, and should clear within a microsecond. 1232 */ 1233 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1234 ctrl_data |= MASTER_CTRL_OOB_DIS; 1235 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1236 1237 AT_WRITE_FLUSH(hw); 1238 msleep(10); 1239 /* Wait at least 10ms for All module to be Idle */ 1240 1241 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1242 dev_err(&pdev->dev, 1243 "MAC state machine can't be idle since" 1244 " disabled for 10ms second\n"); 1245 return -1; 1246 } 1247 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1248 1249 /* driver control speed/duplex */ 1250 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1251 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1252 1253 /* clk switch setting */ 1254 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1255 switch (hw->nic_type) { 1256 case athr_l2c_b: 1257 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1258 SERDES_MAC_CLK_SLOWDOWN); 1259 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1260 break; 1261 case athr_l2c_b2: 1262 case athr_l1d_2: 1263 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1264 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1265 break; 1266 default: 1267 break; 1268 } 1269 1270 return 0; 1271 } 1272 1273 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1274 { 1275 u16 ctrl_flags = hw->ctrl_flags; 1276 1277 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1278 atl1c_set_aspm(hw, SPEED_0); 1279 hw->ctrl_flags = ctrl_flags; 1280 } 1281 1282 /* 1283 * Set ASPM state. 1284 * Enable/disable L0s/L1 depend on link state. 1285 */ 1286 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1287 { 1288 u32 pm_ctrl_data; 1289 u32 link_l1_timer; 1290 1291 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1292 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1293 PM_CTRL_ASPM_L0S_EN | 1294 PM_CTRL_MAC_ASPM_CHK); 1295 /* L1 timer */ 1296 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1297 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1298 link_l1_timer = 1299 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1300 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1301 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1302 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1303 } else { 1304 link_l1_timer = hw->nic_type == athr_l2c_b ? 1305 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1306 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1307 link_l1_timer = 1; 1308 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1309 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1310 } 1311 1312 /* L0S/L1 enable */ 1313 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1314 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1315 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1316 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1317 1318 /* l2cb & l1d & l2cb2 & l1d2 */ 1319 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1320 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1321 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1322 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1323 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1324 PM_CTRL_SERDES_PD_EX_L1 | 1325 PM_CTRL_CLK_SWH_L1; 1326 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1327 PM_CTRL_SERDES_PLL_L1_EN | 1328 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1329 PM_CTRL_SA_DLY_EN | 1330 PM_CTRL_HOTRST); 1331 /* disable l0s if link down or l2cb */ 1332 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1333 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1334 } else { /* l1c */ 1335 pm_ctrl_data = 1336 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1337 if (link_speed != SPEED_0) { 1338 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1339 PM_CTRL_SERDES_PLL_L1_EN | 1340 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1341 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1342 PM_CTRL_CLK_SWH_L1 | 1343 PM_CTRL_ASPM_L0S_EN | 1344 PM_CTRL_ASPM_L1_EN); 1345 } else { /* link down */ 1346 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1347 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1348 PM_CTRL_SERDES_PLL_L1_EN | 1349 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1350 PM_CTRL_ASPM_L0S_EN); 1351 } 1352 } 1353 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1354 1355 return; 1356 } 1357 1358 /** 1359 * atl1c_configure - Configure Transmit&Receive Unit after Reset 1360 * @adapter: board private structure 1361 * 1362 * Configure the Tx /Rx unit of the MAC after a reset. 1363 */ 1364 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1365 { 1366 struct atl1c_hw *hw = &adapter->hw; 1367 u32 master_ctrl_data = 0; 1368 u32 intr_modrt_data; 1369 u32 data; 1370 1371 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1372 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1373 MASTER_CTRL_RX_ITIMER_EN | 1374 MASTER_CTRL_INT_RDCLR); 1375 /* clear interrupt status */ 1376 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1377 /* Clear any WOL status */ 1378 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1379 /* set Interrupt Clear Timer 1380 * HW will enable self to assert interrupt event to system after 1381 * waiting x-time for software to notify it accept interrupt. 1382 */ 1383 1384 data = CLK_GATING_EN_ALL; 1385 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1386 if (hw->nic_type == athr_l2c_b) 1387 data &= ~CLK_GATING_RXMAC_EN; 1388 } else 1389 data = 0; 1390 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1391 1392 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1393 hw->ict & INT_RETRIG_TIMER_MASK); 1394 1395 atl1c_configure_des_ring(adapter); 1396 1397 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1398 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1399 IRQ_MODRT_TX_TIMER_SHIFT; 1400 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1401 IRQ_MODRT_RX_TIMER_SHIFT; 1402 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1403 master_ctrl_data |= 1404 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1405 } 1406 1407 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1408 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1409 1410 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1411 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1412 1413 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1414 hw->smb_timer & SMB_STAT_TIMER_MASK); 1415 1416 /* set MTU */ 1417 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1418 VLAN_HLEN + ETH_FCS_LEN); 1419 1420 atl1c_configure_tx(adapter); 1421 atl1c_configure_rx(adapter); 1422 atl1c_configure_dma(adapter); 1423 1424 return 0; 1425 } 1426 1427 static int atl1c_configure(struct atl1c_adapter *adapter) 1428 { 1429 struct net_device *netdev = adapter->netdev; 1430 int num; 1431 1432 atl1c_init_ring_ptrs(adapter); 1433 atl1c_set_multi(netdev); 1434 atl1c_restore_vlan(adapter); 1435 1436 num = atl1c_alloc_rx_buffer(adapter); 1437 if (unlikely(num == 0)) 1438 return -ENOMEM; 1439 1440 if (atl1c_configure_mac(adapter)) 1441 return -EIO; 1442 1443 return 0; 1444 } 1445 1446 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1447 { 1448 u16 hw_reg_addr = 0; 1449 unsigned long *stats_item = NULL; 1450 u32 data; 1451 1452 /* update rx status */ 1453 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1454 stats_item = &adapter->hw_stats.rx_ok; 1455 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1456 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1457 *stats_item += data; 1458 stats_item++; 1459 hw_reg_addr += 4; 1460 } 1461 /* update tx status */ 1462 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1463 stats_item = &adapter->hw_stats.tx_ok; 1464 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1465 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1466 *stats_item += data; 1467 stats_item++; 1468 hw_reg_addr += 4; 1469 } 1470 } 1471 1472 /** 1473 * atl1c_get_stats - Get System Network Statistics 1474 * @netdev: network interface device structure 1475 * 1476 * Returns the address of the device statistics structure. 1477 * The statistics are actually updated from the timer callback. 1478 */ 1479 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1480 { 1481 struct atl1c_adapter *adapter = netdev_priv(netdev); 1482 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1483 struct net_device_stats *net_stats = &netdev->stats; 1484 1485 atl1c_update_hw_stats(adapter); 1486 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1487 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1488 net_stats->multicast = hw_stats->rx_mcast; 1489 net_stats->collisions = hw_stats->tx_1_col + 1490 hw_stats->tx_2_col + 1491 hw_stats->tx_late_col + 1492 hw_stats->tx_abort_col; 1493 1494 net_stats->rx_errors = hw_stats->rx_frag + 1495 hw_stats->rx_fcs_err + 1496 hw_stats->rx_len_err + 1497 hw_stats->rx_sz_ov + 1498 hw_stats->rx_rrd_ov + 1499 hw_stats->rx_align_err + 1500 hw_stats->rx_rxf_ov; 1501 1502 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1503 net_stats->rx_length_errors = hw_stats->rx_len_err; 1504 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1505 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1506 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1507 1508 net_stats->tx_errors = hw_stats->tx_late_col + 1509 hw_stats->tx_abort_col + 1510 hw_stats->tx_underrun + 1511 hw_stats->tx_trunc; 1512 1513 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1514 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1515 net_stats->tx_window_errors = hw_stats->tx_late_col; 1516 1517 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1518 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1519 1520 return net_stats; 1521 } 1522 1523 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1524 { 1525 u16 phy_data; 1526 1527 spin_lock(&adapter->mdio_lock); 1528 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1529 spin_unlock(&adapter->mdio_lock); 1530 } 1531 1532 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter, 1533 enum atl1c_trans_queue type) 1534 { 1535 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1536 struct atl1c_buffer *buffer_info; 1537 struct pci_dev *pdev = adapter->pdev; 1538 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1539 u16 hw_next_to_clean; 1540 u16 reg; 1541 unsigned int total_bytes = 0, total_packets = 0; 1542 1543 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX; 1544 1545 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean); 1546 1547 while (next_to_clean != hw_next_to_clean) { 1548 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1549 if (buffer_info->skb) { 1550 total_bytes += buffer_info->skb->len; 1551 total_packets++; 1552 } 1553 atl1c_clean_buffer(pdev, buffer_info); 1554 if (++next_to_clean == tpd_ring->count) 1555 next_to_clean = 0; 1556 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1557 } 1558 1559 netdev_completed_queue(adapter->netdev, total_packets, total_bytes); 1560 1561 if (netif_queue_stopped(adapter->netdev) && 1562 netif_carrier_ok(adapter->netdev)) { 1563 netif_wake_queue(adapter->netdev); 1564 } 1565 1566 return true; 1567 } 1568 1569 /** 1570 * atl1c_intr - Interrupt Handler 1571 * @irq: interrupt number 1572 * @data: pointer to a network interface device structure 1573 */ 1574 static irqreturn_t atl1c_intr(int irq, void *data) 1575 { 1576 struct net_device *netdev = data; 1577 struct atl1c_adapter *adapter = netdev_priv(netdev); 1578 struct pci_dev *pdev = adapter->pdev; 1579 struct atl1c_hw *hw = &adapter->hw; 1580 int max_ints = AT_MAX_INT_WORK; 1581 int handled = IRQ_NONE; 1582 u32 status; 1583 u32 reg_data; 1584 1585 do { 1586 AT_READ_REG(hw, REG_ISR, ®_data); 1587 status = reg_data & hw->intr_mask; 1588 1589 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1590 if (max_ints != AT_MAX_INT_WORK) 1591 handled = IRQ_HANDLED; 1592 break; 1593 } 1594 /* link event */ 1595 if (status & ISR_GPHY) 1596 atl1c_clear_phy_int(adapter); 1597 /* Ack ISR */ 1598 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1599 if (status & ISR_RX_PKT) { 1600 if (likely(napi_schedule_prep(&adapter->napi))) { 1601 hw->intr_mask &= ~ISR_RX_PKT; 1602 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1603 __napi_schedule(&adapter->napi); 1604 } 1605 } 1606 if (status & ISR_TX_PKT) 1607 atl1c_clean_tx_irq(adapter, atl1c_trans_normal); 1608 1609 handled = IRQ_HANDLED; 1610 /* check if PCIE PHY Link down */ 1611 if (status & ISR_ERROR) { 1612 if (netif_msg_hw(adapter)) 1613 dev_err(&pdev->dev, 1614 "atl1c hardware error (status = 0x%x)\n", 1615 status & ISR_ERROR); 1616 /* reset MAC */ 1617 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1618 schedule_work(&adapter->common_task); 1619 return IRQ_HANDLED; 1620 } 1621 1622 if (status & ISR_OVER) 1623 if (netif_msg_intr(adapter)) 1624 dev_warn(&pdev->dev, 1625 "TX/RX overflow (status = 0x%x)\n", 1626 status & ISR_OVER); 1627 1628 /* link event */ 1629 if (status & (ISR_GPHY | ISR_MANUAL)) { 1630 netdev->stats.tx_carrier_errors++; 1631 atl1c_link_chg_event(adapter); 1632 break; 1633 } 1634 1635 } while (--max_ints > 0); 1636 /* re-enable Interrupt*/ 1637 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1638 return handled; 1639 } 1640 1641 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1642 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1643 { 1644 /* 1645 * The pid field in RRS in not correct sometimes, so we 1646 * cannot figure out if the packet is fragmented or not, 1647 * so we tell the KERNEL CHECKSUM_NONE 1648 */ 1649 skb_checksum_none_assert(skb); 1650 } 1651 1652 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter) 1653 { 1654 struct sk_buff *skb; 1655 struct page *page; 1656 1657 if (adapter->rx_frag_size > PAGE_SIZE) 1658 return netdev_alloc_skb(adapter->netdev, 1659 adapter->rx_buffer_len); 1660 1661 page = adapter->rx_page; 1662 if (!page) { 1663 adapter->rx_page = page = alloc_page(GFP_ATOMIC); 1664 if (unlikely(!page)) 1665 return NULL; 1666 adapter->rx_page_offset = 0; 1667 } 1668 1669 skb = build_skb(page_address(page) + adapter->rx_page_offset, 1670 adapter->rx_frag_size); 1671 if (likely(skb)) { 1672 skb_reserve(skb, NET_SKB_PAD); 1673 adapter->rx_page_offset += adapter->rx_frag_size; 1674 if (adapter->rx_page_offset >= PAGE_SIZE) 1675 adapter->rx_page = NULL; 1676 else 1677 get_page(page); 1678 } 1679 return skb; 1680 } 1681 1682 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter) 1683 { 1684 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1685 struct pci_dev *pdev = adapter->pdev; 1686 struct atl1c_buffer *buffer_info, *next_info; 1687 struct sk_buff *skb; 1688 void *vir_addr = NULL; 1689 u16 num_alloc = 0; 1690 u16 rfd_next_to_use, next_next; 1691 struct atl1c_rx_free_desc *rfd_desc; 1692 dma_addr_t mapping; 1693 1694 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1695 if (++next_next == rfd_ring->count) 1696 next_next = 0; 1697 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1698 next_info = &rfd_ring->buffer_info[next_next]; 1699 1700 while (next_info->flags & ATL1C_BUFFER_FREE) { 1701 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1702 1703 skb = atl1c_alloc_skb(adapter); 1704 if (unlikely(!skb)) { 1705 if (netif_msg_rx_err(adapter)) 1706 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1707 break; 1708 } 1709 1710 /* 1711 * Make buffer alignment 2 beyond a 16 byte boundary 1712 * this will result in a 16 byte aligned IP header after 1713 * the 14 byte MAC header is removed 1714 */ 1715 vir_addr = skb->data; 1716 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1717 buffer_info->skb = skb; 1718 buffer_info->length = adapter->rx_buffer_len; 1719 mapping = dma_map_single(&pdev->dev, vir_addr, 1720 buffer_info->length, DMA_FROM_DEVICE); 1721 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) { 1722 dev_kfree_skb(skb); 1723 buffer_info->skb = NULL; 1724 buffer_info->length = 0; 1725 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1726 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1727 break; 1728 } 1729 buffer_info->dma = mapping; 1730 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1731 ATL1C_PCIMAP_FROMDEVICE); 1732 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1733 rfd_next_to_use = next_next; 1734 if (++next_next == rfd_ring->count) 1735 next_next = 0; 1736 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1737 next_info = &rfd_ring->buffer_info[next_next]; 1738 num_alloc++; 1739 } 1740 1741 if (num_alloc) { 1742 /* TODO: update mailbox here */ 1743 wmb(); 1744 rfd_ring->next_to_use = rfd_next_to_use; 1745 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1746 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1747 } 1748 1749 return num_alloc; 1750 } 1751 1752 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1753 struct atl1c_recv_ret_status *rrs, u16 num) 1754 { 1755 u16 i; 1756 /* the relationship between rrd and rfd is one map one */ 1757 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1758 rrd_ring->next_to_clean)) { 1759 rrs->word3 &= ~RRS_RXD_UPDATED; 1760 if (++rrd_ring->next_to_clean == rrd_ring->count) 1761 rrd_ring->next_to_clean = 0; 1762 } 1763 } 1764 1765 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1766 struct atl1c_recv_ret_status *rrs, u16 num) 1767 { 1768 u16 i; 1769 u16 rfd_index; 1770 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1771 1772 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1773 RRS_RX_RFD_INDEX_MASK; 1774 for (i = 0; i < num; i++) { 1775 buffer_info[rfd_index].skb = NULL; 1776 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1777 ATL1C_BUFFER_FREE); 1778 if (++rfd_index == rfd_ring->count) 1779 rfd_index = 0; 1780 } 1781 rfd_ring->next_to_clean = rfd_index; 1782 } 1783 1784 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1785 int *work_done, int work_to_do) 1786 { 1787 u16 rfd_num, rfd_index; 1788 u16 count = 0; 1789 u16 length; 1790 struct pci_dev *pdev = adapter->pdev; 1791 struct net_device *netdev = adapter->netdev; 1792 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1793 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1794 struct sk_buff *skb; 1795 struct atl1c_recv_ret_status *rrs; 1796 struct atl1c_buffer *buffer_info; 1797 1798 while (1) { 1799 if (*work_done >= work_to_do) 1800 break; 1801 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1802 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1803 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1804 RRS_RX_RFD_CNT_MASK; 1805 if (unlikely(rfd_num != 1)) 1806 /* TODO support mul rfd*/ 1807 if (netif_msg_rx_err(adapter)) 1808 dev_warn(&pdev->dev, 1809 "Multi rfd not support yet!\n"); 1810 goto rrs_checked; 1811 } else { 1812 break; 1813 } 1814 rrs_checked: 1815 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1816 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1817 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1818 if (netif_msg_rx_err(adapter)) 1819 dev_warn(&pdev->dev, 1820 "wrong packet! rrs word3 is %x\n", 1821 rrs->word3); 1822 continue; 1823 } 1824 1825 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1826 RRS_PKT_SIZE_MASK); 1827 /* Good Receive */ 1828 if (likely(rfd_num == 1)) { 1829 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1830 RRS_RX_RFD_INDEX_MASK; 1831 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1832 dma_unmap_single(&pdev->dev, buffer_info->dma, 1833 buffer_info->length, DMA_FROM_DEVICE); 1834 skb = buffer_info->skb; 1835 } else { 1836 /* TODO */ 1837 if (netif_msg_rx_err(adapter)) 1838 dev_warn(&pdev->dev, 1839 "Multi rfd not support yet!\n"); 1840 break; 1841 } 1842 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1843 skb_put(skb, length - ETH_FCS_LEN); 1844 skb->protocol = eth_type_trans(skb, netdev); 1845 atl1c_rx_checksum(adapter, skb, rrs); 1846 if (rrs->word3 & RRS_VLAN_INS) { 1847 u16 vlan; 1848 1849 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1850 vlan = le16_to_cpu(vlan); 1851 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1852 } 1853 netif_receive_skb(skb); 1854 1855 (*work_done)++; 1856 count++; 1857 } 1858 if (count) 1859 atl1c_alloc_rx_buffer(adapter); 1860 } 1861 1862 /** 1863 * atl1c_clean - NAPI Rx polling callback 1864 */ 1865 static int atl1c_clean(struct napi_struct *napi, int budget) 1866 { 1867 struct atl1c_adapter *adapter = 1868 container_of(napi, struct atl1c_adapter, napi); 1869 int work_done = 0; 1870 1871 /* Keep link state information with original netdev */ 1872 if (!netif_carrier_ok(adapter->netdev)) 1873 goto quit_polling; 1874 /* just enable one RXQ */ 1875 atl1c_clean_rx_irq(adapter, &work_done, budget); 1876 1877 if (work_done < budget) { 1878 quit_polling: 1879 napi_complete_done(napi, work_done); 1880 adapter->hw.intr_mask |= ISR_RX_PKT; 1881 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1882 } 1883 return work_done; 1884 } 1885 1886 #ifdef CONFIG_NET_POLL_CONTROLLER 1887 1888 /* 1889 * Polling 'interrupt' - used by things like netconsole to send skbs 1890 * without having to re-enable interrupts. It's not called while 1891 * the interrupt routine is executing. 1892 */ 1893 static void atl1c_netpoll(struct net_device *netdev) 1894 { 1895 struct atl1c_adapter *adapter = netdev_priv(netdev); 1896 1897 disable_irq(adapter->pdev->irq); 1898 atl1c_intr(adapter->pdev->irq, netdev); 1899 enable_irq(adapter->pdev->irq); 1900 } 1901 #endif 1902 1903 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1904 { 1905 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1906 u16 next_to_use = 0; 1907 u16 next_to_clean = 0; 1908 1909 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1910 next_to_use = tpd_ring->next_to_use; 1911 1912 return (u16)(next_to_clean > next_to_use) ? 1913 (next_to_clean - next_to_use - 1) : 1914 (tpd_ring->count + next_to_clean - next_to_use - 1); 1915 } 1916 1917 /* 1918 * get next usable tpd 1919 * Note: should call atl1c_tdp_avail to make sure 1920 * there is enough tpd to use 1921 */ 1922 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1923 enum atl1c_trans_queue type) 1924 { 1925 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1926 struct atl1c_tpd_desc *tpd_desc; 1927 u16 next_to_use = 0; 1928 1929 next_to_use = tpd_ring->next_to_use; 1930 if (++tpd_ring->next_to_use == tpd_ring->count) 1931 tpd_ring->next_to_use = 0; 1932 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1933 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1934 return tpd_desc; 1935 } 1936 1937 static struct atl1c_buffer * 1938 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1939 { 1940 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1941 1942 return &tpd_ring->buffer_info[tpd - 1943 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1944 } 1945 1946 /* Calculate the transmit packet descript needed*/ 1947 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1948 { 1949 u16 tpd_req; 1950 u16 proto_hdr_len = 0; 1951 1952 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1953 1954 if (skb_is_gso(skb)) { 1955 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1956 if (proto_hdr_len < skb_headlen(skb)) 1957 tpd_req++; 1958 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1959 tpd_req++; 1960 } 1961 return tpd_req; 1962 } 1963 1964 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1965 struct sk_buff *skb, 1966 struct atl1c_tpd_desc **tpd, 1967 enum atl1c_trans_queue type) 1968 { 1969 struct pci_dev *pdev = adapter->pdev; 1970 unsigned short offload_type; 1971 u8 hdr_len; 1972 u32 real_len; 1973 1974 if (skb_is_gso(skb)) { 1975 int err; 1976 1977 err = skb_cow_head(skb, 0); 1978 if (err < 0) 1979 return err; 1980 1981 offload_type = skb_shinfo(skb)->gso_type; 1982 1983 if (offload_type & SKB_GSO_TCPV4) { 1984 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1985 + ntohs(ip_hdr(skb)->tot_len)); 1986 1987 if (real_len < skb->len) 1988 pskb_trim(skb, real_len); 1989 1990 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1991 if (unlikely(skb->len == hdr_len)) { 1992 /* only xsum need */ 1993 if (netif_msg_tx_queued(adapter)) 1994 dev_warn(&pdev->dev, 1995 "IPV4 tso with zero data??\n"); 1996 goto check_sum; 1997 } else { 1998 ip_hdr(skb)->check = 0; 1999 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2000 ip_hdr(skb)->saddr, 2001 ip_hdr(skb)->daddr, 2002 0, IPPROTO_TCP, 0); 2003 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2004 } 2005 } 2006 2007 if (offload_type & SKB_GSO_TCPV6) { 2008 struct atl1c_tpd_ext_desc *etpd = 2009 *(struct atl1c_tpd_ext_desc **)(tpd); 2010 2011 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2012 *tpd = atl1c_get_tpd(adapter, type); 2013 ipv6_hdr(skb)->payload_len = 0; 2014 /* check payload == 0 byte ? */ 2015 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2016 if (unlikely(skb->len == hdr_len)) { 2017 /* only xsum need */ 2018 if (netif_msg_tx_queued(adapter)) 2019 dev_warn(&pdev->dev, 2020 "IPV6 tso with zero data??\n"); 2021 goto check_sum; 2022 } else 2023 tcp_v6_gso_csum_prep(skb); 2024 2025 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2026 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2027 etpd->pkt_len = cpu_to_le32(skb->len); 2028 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2029 } 2030 2031 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2032 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2033 TPD_TCPHDR_OFFSET_SHIFT; 2034 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2035 TPD_MSS_SHIFT; 2036 return 0; 2037 } 2038 2039 check_sum: 2040 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2041 u8 css, cso; 2042 cso = skb_checksum_start_offset(skb); 2043 2044 if (unlikely(cso & 0x1)) { 2045 if (netif_msg_tx_err(adapter)) 2046 dev_err(&adapter->pdev->dev, 2047 "payload offset should not an event number\n"); 2048 return -1; 2049 } else { 2050 css = cso + skb->csum_offset; 2051 2052 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2053 TPD_PLOADOFFSET_SHIFT; 2054 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2055 TPD_CCSUM_OFFSET_SHIFT; 2056 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2057 } 2058 } 2059 return 0; 2060 } 2061 2062 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2063 struct atl1c_tpd_desc *first_tpd, 2064 enum atl1c_trans_queue type) 2065 { 2066 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2067 struct atl1c_buffer *buffer_info; 2068 struct atl1c_tpd_desc *tpd; 2069 u16 first_index, index; 2070 2071 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2072 index = first_index; 2073 while (index != tpd_ring->next_to_use) { 2074 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2075 buffer_info = &tpd_ring->buffer_info[index]; 2076 atl1c_clean_buffer(adpt->pdev, buffer_info); 2077 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2078 if (++index == tpd_ring->count) 2079 index = 0; 2080 } 2081 tpd_ring->next_to_use = first_index; 2082 } 2083 2084 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2085 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2086 enum atl1c_trans_queue type) 2087 { 2088 struct atl1c_tpd_desc *use_tpd = NULL; 2089 struct atl1c_buffer *buffer_info = NULL; 2090 u16 buf_len = skb_headlen(skb); 2091 u16 map_len = 0; 2092 u16 mapped_len = 0; 2093 u16 hdr_len = 0; 2094 u16 nr_frags; 2095 u16 f; 2096 int tso; 2097 2098 nr_frags = skb_shinfo(skb)->nr_frags; 2099 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2100 if (tso) { 2101 /* TSO */ 2102 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2103 use_tpd = tpd; 2104 2105 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2106 buffer_info->length = map_len; 2107 buffer_info->dma = dma_map_single(&adapter->pdev->dev, 2108 skb->data, hdr_len, 2109 DMA_TO_DEVICE); 2110 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2111 goto err_dma; 2112 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2113 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2114 ATL1C_PCIMAP_TODEVICE); 2115 mapped_len += map_len; 2116 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2117 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2118 } 2119 2120 if (mapped_len < buf_len) { 2121 /* mapped_len == 0, means we should use the first tpd, 2122 which is given by caller */ 2123 if (mapped_len == 0) 2124 use_tpd = tpd; 2125 else { 2126 use_tpd = atl1c_get_tpd(adapter, type); 2127 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2128 } 2129 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2130 buffer_info->length = buf_len - mapped_len; 2131 buffer_info->dma = 2132 dma_map_single(&adapter->pdev->dev, 2133 skb->data + mapped_len, 2134 buffer_info->length, DMA_TO_DEVICE); 2135 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2136 goto err_dma; 2137 2138 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2139 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2140 ATL1C_PCIMAP_TODEVICE); 2141 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2142 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2143 } 2144 2145 for (f = 0; f < nr_frags; f++) { 2146 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2147 2148 use_tpd = atl1c_get_tpd(adapter, type); 2149 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2150 2151 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2152 buffer_info->length = skb_frag_size(frag); 2153 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2154 frag, 0, 2155 buffer_info->length, 2156 DMA_TO_DEVICE); 2157 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2158 goto err_dma; 2159 2160 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2161 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2162 ATL1C_PCIMAP_TODEVICE); 2163 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2164 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2165 } 2166 2167 /* The last tpd */ 2168 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2169 /* The last buffer info contain the skb address, 2170 so it will be free after unmap */ 2171 buffer_info->skb = skb; 2172 2173 return 0; 2174 2175 err_dma: 2176 buffer_info->dma = 0; 2177 buffer_info->length = 0; 2178 return -1; 2179 } 2180 2181 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2182 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2183 { 2184 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2185 u16 reg; 2186 2187 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2188 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2189 } 2190 2191 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2192 struct net_device *netdev) 2193 { 2194 struct atl1c_adapter *adapter = netdev_priv(netdev); 2195 u16 tpd_req; 2196 struct atl1c_tpd_desc *tpd; 2197 enum atl1c_trans_queue type = atl1c_trans_normal; 2198 2199 if (test_bit(__AT_DOWN, &adapter->flags)) { 2200 dev_kfree_skb_any(skb); 2201 return NETDEV_TX_OK; 2202 } 2203 2204 tpd_req = atl1c_cal_tpd_req(skb); 2205 2206 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2207 /* no enough descriptor, just stop queue */ 2208 netif_stop_queue(netdev); 2209 return NETDEV_TX_BUSY; 2210 } 2211 2212 tpd = atl1c_get_tpd(adapter, type); 2213 2214 /* do TSO and check sum */ 2215 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2216 dev_kfree_skb_any(skb); 2217 return NETDEV_TX_OK; 2218 } 2219 2220 if (unlikely(skb_vlan_tag_present(skb))) { 2221 u16 vlan = skb_vlan_tag_get(skb); 2222 __le16 tag; 2223 2224 vlan = cpu_to_le16(vlan); 2225 AT_VLAN_TO_TAG(vlan, tag); 2226 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2227 tpd->vlan_tag = tag; 2228 } 2229 2230 if (skb_network_offset(skb) != ETH_HLEN) 2231 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2232 2233 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2234 netif_info(adapter, tx_done, adapter->netdev, 2235 "tx-skb dropped due to dma error\n"); 2236 /* roll back tpd/buffer */ 2237 atl1c_tx_rollback(adapter, tpd, type); 2238 dev_kfree_skb_any(skb); 2239 } else { 2240 netdev_sent_queue(adapter->netdev, skb->len); 2241 atl1c_tx_queue(adapter, skb, tpd, type); 2242 } 2243 2244 return NETDEV_TX_OK; 2245 } 2246 2247 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2248 { 2249 struct net_device *netdev = adapter->netdev; 2250 2251 free_irq(adapter->pdev->irq, netdev); 2252 2253 if (adapter->have_msi) 2254 pci_disable_msi(adapter->pdev); 2255 } 2256 2257 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2258 { 2259 struct pci_dev *pdev = adapter->pdev; 2260 struct net_device *netdev = adapter->netdev; 2261 int flags = 0; 2262 int err = 0; 2263 2264 adapter->have_msi = true; 2265 err = pci_enable_msi(adapter->pdev); 2266 if (err) { 2267 if (netif_msg_ifup(adapter)) 2268 dev_err(&pdev->dev, 2269 "Unable to allocate MSI interrupt Error: %d\n", 2270 err); 2271 adapter->have_msi = false; 2272 } 2273 2274 if (!adapter->have_msi) 2275 flags |= IRQF_SHARED; 2276 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2277 netdev->name, netdev); 2278 if (err) { 2279 if (netif_msg_ifup(adapter)) 2280 dev_err(&pdev->dev, 2281 "Unable to allocate interrupt Error: %d\n", 2282 err); 2283 if (adapter->have_msi) 2284 pci_disable_msi(adapter->pdev); 2285 return err; 2286 } 2287 if (netif_msg_ifup(adapter)) 2288 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2289 return err; 2290 } 2291 2292 2293 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2294 { 2295 /* release tx-pending skbs and reset tx/rx ring index */ 2296 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2297 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2298 atl1c_clean_rx_ring(adapter); 2299 } 2300 2301 static int atl1c_up(struct atl1c_adapter *adapter) 2302 { 2303 struct net_device *netdev = adapter->netdev; 2304 int err; 2305 2306 netif_carrier_off(netdev); 2307 2308 err = atl1c_configure(adapter); 2309 if (unlikely(err)) 2310 goto err_up; 2311 2312 err = atl1c_request_irq(adapter); 2313 if (unlikely(err)) 2314 goto err_up; 2315 2316 atl1c_check_link_status(adapter); 2317 clear_bit(__AT_DOWN, &adapter->flags); 2318 napi_enable(&adapter->napi); 2319 atl1c_irq_enable(adapter); 2320 netif_start_queue(netdev); 2321 return err; 2322 2323 err_up: 2324 atl1c_clean_rx_ring(adapter); 2325 return err; 2326 } 2327 2328 static void atl1c_down(struct atl1c_adapter *adapter) 2329 { 2330 struct net_device *netdev = adapter->netdev; 2331 2332 atl1c_del_timer(adapter); 2333 adapter->work_event = 0; /* clear all event */ 2334 /* signal that we're down so the interrupt handler does not 2335 * reschedule our watchdog timer */ 2336 set_bit(__AT_DOWN, &adapter->flags); 2337 netif_carrier_off(netdev); 2338 napi_disable(&adapter->napi); 2339 atl1c_irq_disable(adapter); 2340 atl1c_free_irq(adapter); 2341 /* disable ASPM if device inactive */ 2342 atl1c_disable_l0s_l1(&adapter->hw); 2343 /* reset MAC to disable all RX/TX */ 2344 atl1c_reset_mac(&adapter->hw); 2345 msleep(1); 2346 2347 adapter->link_speed = SPEED_0; 2348 adapter->link_duplex = -1; 2349 atl1c_reset_dma_ring(adapter); 2350 } 2351 2352 /** 2353 * atl1c_open - Called when a network interface is made active 2354 * @netdev: network interface device structure 2355 * 2356 * Returns 0 on success, negative value on failure 2357 * 2358 * The open entry point is called when a network interface is made 2359 * active by the system (IFF_UP). At this point all resources needed 2360 * for transmit and receive operations are allocated, the interrupt 2361 * handler is registered with the OS, the watchdog timer is started, 2362 * and the stack is notified that the interface is ready. 2363 */ 2364 static int atl1c_open(struct net_device *netdev) 2365 { 2366 struct atl1c_adapter *adapter = netdev_priv(netdev); 2367 int err; 2368 2369 /* disallow open during test */ 2370 if (test_bit(__AT_TESTING, &adapter->flags)) 2371 return -EBUSY; 2372 2373 /* allocate rx/tx dma buffer & descriptors */ 2374 err = atl1c_setup_ring_resources(adapter); 2375 if (unlikely(err)) 2376 return err; 2377 2378 err = atl1c_up(adapter); 2379 if (unlikely(err)) 2380 goto err_up; 2381 2382 return 0; 2383 2384 err_up: 2385 atl1c_free_irq(adapter); 2386 atl1c_free_ring_resources(adapter); 2387 atl1c_reset_mac(&adapter->hw); 2388 return err; 2389 } 2390 2391 /** 2392 * atl1c_close - Disables a network interface 2393 * @netdev: network interface device structure 2394 * 2395 * Returns 0, this is not allowed to fail 2396 * 2397 * The close entry point is called when an interface is de-activated 2398 * by the OS. The hardware is still under the drivers control, but 2399 * needs to be disabled. A global MAC reset is issued to stop the 2400 * hardware, and all transmit and receive resources are freed. 2401 */ 2402 static int atl1c_close(struct net_device *netdev) 2403 { 2404 struct atl1c_adapter *adapter = netdev_priv(netdev); 2405 2406 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2407 set_bit(__AT_DOWN, &adapter->flags); 2408 cancel_work_sync(&adapter->common_task); 2409 atl1c_down(adapter); 2410 atl1c_free_ring_resources(adapter); 2411 return 0; 2412 } 2413 2414 static int atl1c_suspend(struct device *dev) 2415 { 2416 struct net_device *netdev = dev_get_drvdata(dev); 2417 struct atl1c_adapter *adapter = netdev_priv(netdev); 2418 struct atl1c_hw *hw = &adapter->hw; 2419 u32 wufc = adapter->wol; 2420 2421 atl1c_disable_l0s_l1(hw); 2422 if (netif_running(netdev)) { 2423 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2424 atl1c_down(adapter); 2425 } 2426 netif_device_detach(netdev); 2427 2428 if (wufc) 2429 if (atl1c_phy_to_ps_link(hw) != 0) 2430 dev_dbg(dev, "phy power saving failed"); 2431 2432 atl1c_power_saving(hw, wufc); 2433 2434 return 0; 2435 } 2436 2437 #ifdef CONFIG_PM_SLEEP 2438 static int atl1c_resume(struct device *dev) 2439 { 2440 struct net_device *netdev = dev_get_drvdata(dev); 2441 struct atl1c_adapter *adapter = netdev_priv(netdev); 2442 2443 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2444 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2445 2446 atl1c_phy_reset(&adapter->hw); 2447 atl1c_reset_mac(&adapter->hw); 2448 atl1c_phy_init(&adapter->hw); 2449 2450 netif_device_attach(netdev); 2451 if (netif_running(netdev)) 2452 atl1c_up(adapter); 2453 2454 return 0; 2455 } 2456 #endif 2457 2458 static void atl1c_shutdown(struct pci_dev *pdev) 2459 { 2460 struct net_device *netdev = pci_get_drvdata(pdev); 2461 struct atl1c_adapter *adapter = netdev_priv(netdev); 2462 2463 atl1c_suspend(&pdev->dev); 2464 pci_wake_from_d3(pdev, adapter->wol); 2465 pci_set_power_state(pdev, PCI_D3hot); 2466 } 2467 2468 static const struct net_device_ops atl1c_netdev_ops = { 2469 .ndo_open = atl1c_open, 2470 .ndo_stop = atl1c_close, 2471 .ndo_validate_addr = eth_validate_addr, 2472 .ndo_start_xmit = atl1c_xmit_frame, 2473 .ndo_set_mac_address = atl1c_set_mac_addr, 2474 .ndo_set_rx_mode = atl1c_set_multi, 2475 .ndo_change_mtu = atl1c_change_mtu, 2476 .ndo_fix_features = atl1c_fix_features, 2477 .ndo_set_features = atl1c_set_features, 2478 .ndo_do_ioctl = atl1c_ioctl, 2479 .ndo_tx_timeout = atl1c_tx_timeout, 2480 .ndo_get_stats = atl1c_get_stats, 2481 #ifdef CONFIG_NET_POLL_CONTROLLER 2482 .ndo_poll_controller = atl1c_netpoll, 2483 #endif 2484 }; 2485 2486 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2487 { 2488 SET_NETDEV_DEV(netdev, &pdev->dev); 2489 pci_set_drvdata(pdev, netdev); 2490 2491 netdev->netdev_ops = &atl1c_netdev_ops; 2492 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2493 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 2494 atl1c_set_ethtool_ops(netdev); 2495 2496 /* TODO: add when ready */ 2497 netdev->hw_features = NETIF_F_SG | 2498 NETIF_F_HW_CSUM | 2499 NETIF_F_HW_VLAN_CTAG_RX | 2500 NETIF_F_TSO | 2501 NETIF_F_TSO6; 2502 netdev->features = netdev->hw_features | 2503 NETIF_F_HW_VLAN_CTAG_TX; 2504 return 0; 2505 } 2506 2507 /** 2508 * atl1c_probe - Device Initialization Routine 2509 * @pdev: PCI device information struct 2510 * @ent: entry in atl1c_pci_tbl 2511 * 2512 * Returns 0 on success, negative on failure 2513 * 2514 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2515 * The OS initialization, configuring of the adapter private structure, 2516 * and a hardware reset occur. 2517 */ 2518 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2519 { 2520 struct net_device *netdev; 2521 struct atl1c_adapter *adapter; 2522 static int cards_found; 2523 2524 int err = 0; 2525 2526 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2527 err = pci_enable_device_mem(pdev); 2528 if (err) { 2529 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2530 return err; 2531 } 2532 2533 /* 2534 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2535 * shared register for the high 32 bits, so only a single, aligned, 2536 * 4 GB physical address range can be used at a time. 2537 * 2538 * Supporting 64-bit DMA on this hardware is more trouble than it's 2539 * worth. It is far easier to limit to 32-bit DMA than update 2540 * various kernel subsystems to support the mechanics required by a 2541 * fixed-high-32-bit system. 2542 */ 2543 if ((dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)) != 0) || 2544 (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)) != 0)) { 2545 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2546 goto err_dma; 2547 } 2548 2549 err = pci_request_regions(pdev, atl1c_driver_name); 2550 if (err) { 2551 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2552 goto err_pci_reg; 2553 } 2554 2555 pci_set_master(pdev); 2556 2557 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2558 if (netdev == NULL) { 2559 err = -ENOMEM; 2560 goto err_alloc_etherdev; 2561 } 2562 2563 err = atl1c_init_netdev(netdev, pdev); 2564 if (err) { 2565 dev_err(&pdev->dev, "init netdevice failed\n"); 2566 goto err_init_netdev; 2567 } 2568 adapter = netdev_priv(netdev); 2569 adapter->bd_number = cards_found; 2570 adapter->netdev = netdev; 2571 adapter->pdev = pdev; 2572 adapter->hw.adapter = adapter; 2573 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2574 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2575 if (!adapter->hw.hw_addr) { 2576 err = -EIO; 2577 dev_err(&pdev->dev, "cannot map device registers\n"); 2578 goto err_ioremap; 2579 } 2580 2581 /* init mii data */ 2582 adapter->mii.dev = netdev; 2583 adapter->mii.mdio_read = atl1c_mdio_read; 2584 adapter->mii.mdio_write = atl1c_mdio_write; 2585 adapter->mii.phy_id_mask = 0x1f; 2586 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2587 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2588 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2589 /* setup the private structure */ 2590 err = atl1c_sw_init(adapter); 2591 if (err) { 2592 dev_err(&pdev->dev, "net device private data init failed\n"); 2593 goto err_sw_init; 2594 } 2595 /* set max MTU */ 2596 atl1c_set_max_mtu(netdev); 2597 2598 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2599 2600 /* Init GPHY as early as possible due to power saving issue */ 2601 atl1c_phy_reset(&adapter->hw); 2602 2603 err = atl1c_reset_mac(&adapter->hw); 2604 if (err) { 2605 err = -EIO; 2606 goto err_reset; 2607 } 2608 2609 /* reset the controller to 2610 * put the device in a known good starting state */ 2611 err = atl1c_phy_init(&adapter->hw); 2612 if (err) { 2613 err = -EIO; 2614 goto err_reset; 2615 } 2616 if (atl1c_read_mac_addr(&adapter->hw)) { 2617 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2618 netdev->addr_assign_type = NET_ADDR_RANDOM; 2619 } 2620 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2621 if (netif_msg_probe(adapter)) 2622 dev_dbg(&pdev->dev, "mac address : %pM\n", 2623 adapter->hw.mac_addr); 2624 2625 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2626 INIT_WORK(&adapter->common_task, atl1c_common_task); 2627 adapter->work_event = 0; 2628 err = register_netdev(netdev); 2629 if (err) { 2630 dev_err(&pdev->dev, "register netdevice failed\n"); 2631 goto err_register; 2632 } 2633 2634 cards_found++; 2635 return 0; 2636 2637 err_reset: 2638 err_register: 2639 err_sw_init: 2640 iounmap(adapter->hw.hw_addr); 2641 err_init_netdev: 2642 err_ioremap: 2643 free_netdev(netdev); 2644 err_alloc_etherdev: 2645 pci_release_regions(pdev); 2646 err_pci_reg: 2647 err_dma: 2648 pci_disable_device(pdev); 2649 return err; 2650 } 2651 2652 /** 2653 * atl1c_remove - Device Removal Routine 2654 * @pdev: PCI device information struct 2655 * 2656 * atl1c_remove is called by the PCI subsystem to alert the driver 2657 * that it should release a PCI device. The could be caused by a 2658 * Hot-Plug event, or because the driver is going to be removed from 2659 * memory. 2660 */ 2661 static void atl1c_remove(struct pci_dev *pdev) 2662 { 2663 struct net_device *netdev = pci_get_drvdata(pdev); 2664 struct atl1c_adapter *adapter = netdev_priv(netdev); 2665 2666 unregister_netdev(netdev); 2667 /* restore permanent address */ 2668 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2669 atl1c_phy_disable(&adapter->hw); 2670 2671 iounmap(adapter->hw.hw_addr); 2672 2673 pci_release_regions(pdev); 2674 pci_disable_device(pdev); 2675 free_netdev(netdev); 2676 } 2677 2678 /** 2679 * atl1c_io_error_detected - called when PCI error is detected 2680 * @pdev: Pointer to PCI device 2681 * @state: The current pci connection state 2682 * 2683 * This function is called after a PCI bus error affecting 2684 * this device has been detected. 2685 */ 2686 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2687 pci_channel_state_t state) 2688 { 2689 struct net_device *netdev = pci_get_drvdata(pdev); 2690 struct atl1c_adapter *adapter = netdev_priv(netdev); 2691 2692 netif_device_detach(netdev); 2693 2694 if (state == pci_channel_io_perm_failure) 2695 return PCI_ERS_RESULT_DISCONNECT; 2696 2697 if (netif_running(netdev)) 2698 atl1c_down(adapter); 2699 2700 pci_disable_device(pdev); 2701 2702 /* Request a slot slot reset. */ 2703 return PCI_ERS_RESULT_NEED_RESET; 2704 } 2705 2706 /** 2707 * atl1c_io_slot_reset - called after the pci bus has been reset. 2708 * @pdev: Pointer to PCI device 2709 * 2710 * Restart the card from scratch, as if from a cold-boot. Implementation 2711 * resembles the first-half of the e1000_resume routine. 2712 */ 2713 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2714 { 2715 struct net_device *netdev = pci_get_drvdata(pdev); 2716 struct atl1c_adapter *adapter = netdev_priv(netdev); 2717 2718 if (pci_enable_device(pdev)) { 2719 if (netif_msg_hw(adapter)) 2720 dev_err(&pdev->dev, 2721 "Cannot re-enable PCI device after reset\n"); 2722 return PCI_ERS_RESULT_DISCONNECT; 2723 } 2724 pci_set_master(pdev); 2725 2726 pci_enable_wake(pdev, PCI_D3hot, 0); 2727 pci_enable_wake(pdev, PCI_D3cold, 0); 2728 2729 atl1c_reset_mac(&adapter->hw); 2730 2731 return PCI_ERS_RESULT_RECOVERED; 2732 } 2733 2734 /** 2735 * atl1c_io_resume - called when traffic can start flowing again. 2736 * @pdev: Pointer to PCI device 2737 * 2738 * This callback is called when the error recovery driver tells us that 2739 * its OK to resume normal operation. Implementation resembles the 2740 * second-half of the atl1c_resume routine. 2741 */ 2742 static void atl1c_io_resume(struct pci_dev *pdev) 2743 { 2744 struct net_device *netdev = pci_get_drvdata(pdev); 2745 struct atl1c_adapter *adapter = netdev_priv(netdev); 2746 2747 if (netif_running(netdev)) { 2748 if (atl1c_up(adapter)) { 2749 if (netif_msg_hw(adapter)) 2750 dev_err(&pdev->dev, 2751 "Cannot bring device back up after reset\n"); 2752 return; 2753 } 2754 } 2755 2756 netif_device_attach(netdev); 2757 } 2758 2759 static const struct pci_error_handlers atl1c_err_handler = { 2760 .error_detected = atl1c_io_error_detected, 2761 .slot_reset = atl1c_io_slot_reset, 2762 .resume = atl1c_io_resume, 2763 }; 2764 2765 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2766 2767 static struct pci_driver atl1c_driver = { 2768 .name = atl1c_driver_name, 2769 .id_table = atl1c_pci_tbl, 2770 .probe = atl1c_probe, 2771 .remove = atl1c_remove, 2772 .shutdown = atl1c_shutdown, 2773 .err_handler = &atl1c_err_handler, 2774 .driver.pm = &atl1c_pm_ops, 2775 }; 2776 2777 module_pci_driver(atl1c_driver); 2778