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 = PCI_DMA_FROMDEVICE; 830 else 831 pci_driection = PCI_DMA_TODEVICE; 832 833 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 834 pci_unmap_single(pdev, buffer_info->dma, 835 buffer_info->length, pci_driection); 836 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 837 pci_unmap_page(pdev, 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 pci_free_consistent(pdev, adapter->ring_header.size, 937 adapter->ring_header.desc, 938 adapter->ring_header.dma); 939 adapter->ring_header.desc = NULL; 940 941 /* Note: just free tdp_ring.buffer_info, 942 * it contain rfd_ring.buffer_info, do not double free */ 943 if (adapter->tpd_ring[0].buffer_info) { 944 kfree(adapter->tpd_ring[0].buffer_info); 945 adapter->tpd_ring[0].buffer_info = NULL; 946 } 947 if (adapter->rx_page) { 948 put_page(adapter->rx_page); 949 adapter->rx_page = NULL; 950 } 951 } 952 953 /** 954 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources 955 * @adapter: board private structure 956 * 957 * Return 0 on success, negative on failure 958 */ 959 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 960 { 961 struct pci_dev *pdev = adapter->pdev; 962 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 963 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 964 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 965 struct atl1c_ring_header *ring_header = &adapter->ring_header; 966 int size; 967 int i; 968 int count = 0; 969 int rx_desc_count = 0; 970 u32 offset = 0; 971 972 rrd_ring->count = rfd_ring->count; 973 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 974 tpd_ring[i].count = tpd_ring[0].count; 975 976 /* 2 tpd queue, one high priority queue, 977 * another normal priority queue */ 978 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 979 rfd_ring->count); 980 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 981 if (unlikely(!tpd_ring->buffer_info)) 982 goto err_nomem; 983 984 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 985 tpd_ring[i].buffer_info = 986 (tpd_ring->buffer_info + count); 987 count += tpd_ring[i].count; 988 } 989 990 rfd_ring->buffer_info = 991 (tpd_ring->buffer_info + count); 992 count += rfd_ring->count; 993 rx_desc_count += rfd_ring->count; 994 995 /* 996 * real ring DMA buffer 997 * each ring/block may need up to 8 bytes for alignment, hence the 998 * additional bytes tacked onto the end. 999 */ 1000 ring_header->size = size = 1001 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1002 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1003 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1004 8 * 4; 1005 1006 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, 1007 &ring_header->dma, GFP_KERNEL); 1008 if (unlikely(!ring_header->desc)) { 1009 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1010 goto err_nomem; 1011 } 1012 /* init TPD ring */ 1013 1014 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1015 offset = tpd_ring[0].dma - ring_header->dma; 1016 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1017 tpd_ring[i].dma = ring_header->dma + offset; 1018 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1019 tpd_ring[i].size = 1020 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1021 offset += roundup(tpd_ring[i].size, 8); 1022 } 1023 /* init RFD ring */ 1024 rfd_ring->dma = ring_header->dma + offset; 1025 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1026 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1027 offset += roundup(rfd_ring->size, 8); 1028 1029 /* init RRD ring */ 1030 rrd_ring->dma = ring_header->dma + offset; 1031 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1032 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1033 rrd_ring->count; 1034 offset += roundup(rrd_ring->size, 8); 1035 1036 return 0; 1037 1038 err_nomem: 1039 kfree(tpd_ring->buffer_info); 1040 return -ENOMEM; 1041 } 1042 1043 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1044 { 1045 struct atl1c_hw *hw = &adapter->hw; 1046 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1047 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1048 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1049 adapter->tpd_ring; 1050 1051 /* TPD */ 1052 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1053 (u32)((tpd_ring[atl1c_trans_normal].dma & 1054 AT_DMA_HI_ADDR_MASK) >> 32)); 1055 /* just enable normal priority TX queue */ 1056 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1057 (u32)(tpd_ring[atl1c_trans_normal].dma & 1058 AT_DMA_LO_ADDR_MASK)); 1059 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1060 (u32)(tpd_ring[atl1c_trans_high].dma & 1061 AT_DMA_LO_ADDR_MASK)); 1062 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1063 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1064 1065 1066 /* RFD */ 1067 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1068 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1069 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1070 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1071 1072 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1073 rfd_ring->count & RFD_RING_SIZE_MASK); 1074 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1075 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1076 1077 /* RRD */ 1078 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1079 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1080 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1081 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1082 1083 if (hw->nic_type == athr_l2c_b) { 1084 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1085 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1086 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1087 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1088 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1089 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1090 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1091 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1092 } 1093 /* Load all of base address above */ 1094 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1095 } 1096 1097 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1098 { 1099 struct atl1c_hw *hw = &adapter->hw; 1100 int max_pay_load; 1101 u16 tx_offload_thresh; 1102 u32 txq_ctrl_data; 1103 1104 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1105 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1106 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1107 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1108 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1109 /* 1110 * if BIOS had changed the dam-read-max-length to an invalid value, 1111 * restore it to default value 1112 */ 1113 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1114 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1115 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1116 } 1117 txq_ctrl_data = 1118 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1119 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1120 1121 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1122 } 1123 1124 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1125 { 1126 struct atl1c_hw *hw = &adapter->hw; 1127 u32 rxq_ctrl_data; 1128 1129 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1130 RXQ_RFD_BURST_NUM_SHIFT; 1131 1132 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1133 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1134 1135 /* aspm for gigabit */ 1136 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1137 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1138 ASPM_THRUPUT_LIMIT_100M); 1139 1140 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1141 } 1142 1143 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1144 { 1145 struct atl1c_hw *hw = &adapter->hw; 1146 u32 dma_ctrl_data; 1147 1148 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1149 DMA_CTRL_RREQ_PRI_DATA | 1150 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1151 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1152 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1153 1154 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1155 } 1156 1157 /* 1158 * Stop the mac, transmit and receive units 1159 * hw - Struct containing variables accessed by shared code 1160 * return : 0 or idle status (if error) 1161 */ 1162 static int atl1c_stop_mac(struct atl1c_hw *hw) 1163 { 1164 u32 data; 1165 1166 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1167 data &= ~RXQ_CTRL_EN; 1168 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1169 1170 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1171 data &= ~TXQ_CTRL_EN; 1172 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1173 1174 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1175 1176 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1177 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1178 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1179 1180 return (int)atl1c_wait_until_idle(hw, 1181 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1182 } 1183 1184 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1185 { 1186 struct atl1c_hw *hw = &adapter->hw; 1187 u32 mac, txq, rxq; 1188 1189 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX; 1190 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1191 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1192 1193 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1194 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1195 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1196 1197 txq |= TXQ_CTRL_EN; 1198 rxq |= RXQ_CTRL_EN; 1199 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1200 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1201 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1202 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1203 MAC_CTRL_HASH_ALG_CRC32; 1204 if (hw->mac_duplex) 1205 mac |= MAC_CTRL_DUPLX; 1206 else 1207 mac &= ~MAC_CTRL_DUPLX; 1208 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1209 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1210 1211 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1212 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1213 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1214 } 1215 1216 /* 1217 * Reset the transmit and receive units; mask and clear all interrupts. 1218 * hw - Struct containing variables accessed by shared code 1219 * return : 0 or idle status (if error) 1220 */ 1221 static int atl1c_reset_mac(struct atl1c_hw *hw) 1222 { 1223 struct atl1c_adapter *adapter = hw->adapter; 1224 struct pci_dev *pdev = adapter->pdev; 1225 u32 ctrl_data = 0; 1226 1227 atl1c_stop_mac(hw); 1228 /* 1229 * Issue Soft Reset to the MAC. This will reset the chip's 1230 * transmit, receive, DMA. It will not effect 1231 * the current PCI configuration. The global reset bit is self- 1232 * clearing, and should clear within a microsecond. 1233 */ 1234 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1235 ctrl_data |= MASTER_CTRL_OOB_DIS; 1236 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1237 1238 AT_WRITE_FLUSH(hw); 1239 msleep(10); 1240 /* Wait at least 10ms for All module to be Idle */ 1241 1242 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1243 dev_err(&pdev->dev, 1244 "MAC state machine can't be idle since" 1245 " disabled for 10ms second\n"); 1246 return -1; 1247 } 1248 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1249 1250 /* driver control speed/duplex */ 1251 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1252 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1253 1254 /* clk switch setting */ 1255 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1256 switch (hw->nic_type) { 1257 case athr_l2c_b: 1258 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1259 SERDES_MAC_CLK_SLOWDOWN); 1260 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1261 break; 1262 case athr_l2c_b2: 1263 case athr_l1d_2: 1264 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1265 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1266 break; 1267 default: 1268 break; 1269 } 1270 1271 return 0; 1272 } 1273 1274 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1275 { 1276 u16 ctrl_flags = hw->ctrl_flags; 1277 1278 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1279 atl1c_set_aspm(hw, SPEED_0); 1280 hw->ctrl_flags = ctrl_flags; 1281 } 1282 1283 /* 1284 * Set ASPM state. 1285 * Enable/disable L0s/L1 depend on link state. 1286 */ 1287 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1288 { 1289 u32 pm_ctrl_data; 1290 u32 link_l1_timer; 1291 1292 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1293 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1294 PM_CTRL_ASPM_L0S_EN | 1295 PM_CTRL_MAC_ASPM_CHK); 1296 /* L1 timer */ 1297 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1298 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1299 link_l1_timer = 1300 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1301 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1302 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1303 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1304 } else { 1305 link_l1_timer = hw->nic_type == athr_l2c_b ? 1306 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1307 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1308 link_l1_timer = 1; 1309 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1310 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1311 } 1312 1313 /* L0S/L1 enable */ 1314 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1315 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1316 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1317 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1318 1319 /* l2cb & l1d & l2cb2 & l1d2 */ 1320 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1321 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1322 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1323 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1324 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1325 PM_CTRL_SERDES_PD_EX_L1 | 1326 PM_CTRL_CLK_SWH_L1; 1327 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1328 PM_CTRL_SERDES_PLL_L1_EN | 1329 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1330 PM_CTRL_SA_DLY_EN | 1331 PM_CTRL_HOTRST); 1332 /* disable l0s if link down or l2cb */ 1333 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1334 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1335 } else { /* l1c */ 1336 pm_ctrl_data = 1337 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1338 if (link_speed != SPEED_0) { 1339 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1340 PM_CTRL_SERDES_PLL_L1_EN | 1341 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1342 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1343 PM_CTRL_CLK_SWH_L1 | 1344 PM_CTRL_ASPM_L0S_EN | 1345 PM_CTRL_ASPM_L1_EN); 1346 } else { /* link down */ 1347 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1348 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1349 PM_CTRL_SERDES_PLL_L1_EN | 1350 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1351 PM_CTRL_ASPM_L0S_EN); 1352 } 1353 } 1354 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1355 1356 return; 1357 } 1358 1359 /** 1360 * atl1c_configure - Configure Transmit&Receive Unit after Reset 1361 * @adapter: board private structure 1362 * 1363 * Configure the Tx /Rx unit of the MAC after a reset. 1364 */ 1365 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1366 { 1367 struct atl1c_hw *hw = &adapter->hw; 1368 u32 master_ctrl_data = 0; 1369 u32 intr_modrt_data; 1370 u32 data; 1371 1372 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1373 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1374 MASTER_CTRL_RX_ITIMER_EN | 1375 MASTER_CTRL_INT_RDCLR); 1376 /* clear interrupt status */ 1377 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1378 /* Clear any WOL status */ 1379 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1380 /* set Interrupt Clear Timer 1381 * HW will enable self to assert interrupt event to system after 1382 * waiting x-time for software to notify it accept interrupt. 1383 */ 1384 1385 data = CLK_GATING_EN_ALL; 1386 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1387 if (hw->nic_type == athr_l2c_b) 1388 data &= ~CLK_GATING_RXMAC_EN; 1389 } else 1390 data = 0; 1391 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1392 1393 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1394 hw->ict & INT_RETRIG_TIMER_MASK); 1395 1396 atl1c_configure_des_ring(adapter); 1397 1398 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1399 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1400 IRQ_MODRT_TX_TIMER_SHIFT; 1401 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1402 IRQ_MODRT_RX_TIMER_SHIFT; 1403 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1404 master_ctrl_data |= 1405 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1406 } 1407 1408 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1409 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1410 1411 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1412 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1413 1414 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1415 hw->smb_timer & SMB_STAT_TIMER_MASK); 1416 1417 /* set MTU */ 1418 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1419 VLAN_HLEN + ETH_FCS_LEN); 1420 1421 atl1c_configure_tx(adapter); 1422 atl1c_configure_rx(adapter); 1423 atl1c_configure_dma(adapter); 1424 1425 return 0; 1426 } 1427 1428 static int atl1c_configure(struct atl1c_adapter *adapter) 1429 { 1430 struct net_device *netdev = adapter->netdev; 1431 int num; 1432 1433 atl1c_init_ring_ptrs(adapter); 1434 atl1c_set_multi(netdev); 1435 atl1c_restore_vlan(adapter); 1436 1437 num = atl1c_alloc_rx_buffer(adapter); 1438 if (unlikely(num == 0)) 1439 return -ENOMEM; 1440 1441 if (atl1c_configure_mac(adapter)) 1442 return -EIO; 1443 1444 return 0; 1445 } 1446 1447 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1448 { 1449 u16 hw_reg_addr = 0; 1450 unsigned long *stats_item = NULL; 1451 u32 data; 1452 1453 /* update rx status */ 1454 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1455 stats_item = &adapter->hw_stats.rx_ok; 1456 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1457 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1458 *stats_item += data; 1459 stats_item++; 1460 hw_reg_addr += 4; 1461 } 1462 /* update tx status */ 1463 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1464 stats_item = &adapter->hw_stats.tx_ok; 1465 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1466 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1467 *stats_item += data; 1468 stats_item++; 1469 hw_reg_addr += 4; 1470 } 1471 } 1472 1473 /** 1474 * atl1c_get_stats - Get System Network Statistics 1475 * @netdev: network interface device structure 1476 * 1477 * Returns the address of the device statistics structure. 1478 * The statistics are actually updated from the timer callback. 1479 */ 1480 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1481 { 1482 struct atl1c_adapter *adapter = netdev_priv(netdev); 1483 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1484 struct net_device_stats *net_stats = &netdev->stats; 1485 1486 atl1c_update_hw_stats(adapter); 1487 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1488 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1489 net_stats->multicast = hw_stats->rx_mcast; 1490 net_stats->collisions = hw_stats->tx_1_col + 1491 hw_stats->tx_2_col + 1492 hw_stats->tx_late_col + 1493 hw_stats->tx_abort_col; 1494 1495 net_stats->rx_errors = hw_stats->rx_frag + 1496 hw_stats->rx_fcs_err + 1497 hw_stats->rx_len_err + 1498 hw_stats->rx_sz_ov + 1499 hw_stats->rx_rrd_ov + 1500 hw_stats->rx_align_err + 1501 hw_stats->rx_rxf_ov; 1502 1503 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1504 net_stats->rx_length_errors = hw_stats->rx_len_err; 1505 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1506 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1507 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1508 1509 net_stats->tx_errors = hw_stats->tx_late_col + 1510 hw_stats->tx_abort_col + 1511 hw_stats->tx_underrun + 1512 hw_stats->tx_trunc; 1513 1514 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1515 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1516 net_stats->tx_window_errors = hw_stats->tx_late_col; 1517 1518 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1519 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1520 1521 return net_stats; 1522 } 1523 1524 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1525 { 1526 u16 phy_data; 1527 1528 spin_lock(&adapter->mdio_lock); 1529 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1530 spin_unlock(&adapter->mdio_lock); 1531 } 1532 1533 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter, 1534 enum atl1c_trans_queue type) 1535 { 1536 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1537 struct atl1c_buffer *buffer_info; 1538 struct pci_dev *pdev = adapter->pdev; 1539 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1540 u16 hw_next_to_clean; 1541 u16 reg; 1542 unsigned int total_bytes = 0, total_packets = 0; 1543 1544 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX; 1545 1546 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean); 1547 1548 while (next_to_clean != hw_next_to_clean) { 1549 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1550 if (buffer_info->skb) { 1551 total_bytes += buffer_info->skb->len; 1552 total_packets++; 1553 } 1554 atl1c_clean_buffer(pdev, buffer_info); 1555 if (++next_to_clean == tpd_ring->count) 1556 next_to_clean = 0; 1557 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1558 } 1559 1560 netdev_completed_queue(adapter->netdev, total_packets, total_bytes); 1561 1562 if (netif_queue_stopped(adapter->netdev) && 1563 netif_carrier_ok(adapter->netdev)) { 1564 netif_wake_queue(adapter->netdev); 1565 } 1566 1567 return true; 1568 } 1569 1570 /** 1571 * atl1c_intr - Interrupt Handler 1572 * @irq: interrupt number 1573 * @data: pointer to a network interface device structure 1574 */ 1575 static irqreturn_t atl1c_intr(int irq, void *data) 1576 { 1577 struct net_device *netdev = data; 1578 struct atl1c_adapter *adapter = netdev_priv(netdev); 1579 struct pci_dev *pdev = adapter->pdev; 1580 struct atl1c_hw *hw = &adapter->hw; 1581 int max_ints = AT_MAX_INT_WORK; 1582 int handled = IRQ_NONE; 1583 u32 status; 1584 u32 reg_data; 1585 1586 do { 1587 AT_READ_REG(hw, REG_ISR, ®_data); 1588 status = reg_data & hw->intr_mask; 1589 1590 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1591 if (max_ints != AT_MAX_INT_WORK) 1592 handled = IRQ_HANDLED; 1593 break; 1594 } 1595 /* link event */ 1596 if (status & ISR_GPHY) 1597 atl1c_clear_phy_int(adapter); 1598 /* Ack ISR */ 1599 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1600 if (status & ISR_RX_PKT) { 1601 if (likely(napi_schedule_prep(&adapter->napi))) { 1602 hw->intr_mask &= ~ISR_RX_PKT; 1603 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1604 __napi_schedule(&adapter->napi); 1605 } 1606 } 1607 if (status & ISR_TX_PKT) 1608 atl1c_clean_tx_irq(adapter, atl1c_trans_normal); 1609 1610 handled = IRQ_HANDLED; 1611 /* check if PCIE PHY Link down */ 1612 if (status & ISR_ERROR) { 1613 if (netif_msg_hw(adapter)) 1614 dev_err(&pdev->dev, 1615 "atl1c hardware error (status = 0x%x)\n", 1616 status & ISR_ERROR); 1617 /* reset MAC */ 1618 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1619 schedule_work(&adapter->common_task); 1620 return IRQ_HANDLED; 1621 } 1622 1623 if (status & ISR_OVER) 1624 if (netif_msg_intr(adapter)) 1625 dev_warn(&pdev->dev, 1626 "TX/RX overflow (status = 0x%x)\n", 1627 status & ISR_OVER); 1628 1629 /* link event */ 1630 if (status & (ISR_GPHY | ISR_MANUAL)) { 1631 netdev->stats.tx_carrier_errors++; 1632 atl1c_link_chg_event(adapter); 1633 break; 1634 } 1635 1636 } while (--max_ints > 0); 1637 /* re-enable Interrupt*/ 1638 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1639 return handled; 1640 } 1641 1642 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1643 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1644 { 1645 /* 1646 * The pid field in RRS in not correct sometimes, so we 1647 * cannot figure out if the packet is fragmented or not, 1648 * so we tell the KERNEL CHECKSUM_NONE 1649 */ 1650 skb_checksum_none_assert(skb); 1651 } 1652 1653 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter) 1654 { 1655 struct sk_buff *skb; 1656 struct page *page; 1657 1658 if (adapter->rx_frag_size > PAGE_SIZE) 1659 return netdev_alloc_skb(adapter->netdev, 1660 adapter->rx_buffer_len); 1661 1662 page = adapter->rx_page; 1663 if (!page) { 1664 adapter->rx_page = page = alloc_page(GFP_ATOMIC); 1665 if (unlikely(!page)) 1666 return NULL; 1667 adapter->rx_page_offset = 0; 1668 } 1669 1670 skb = build_skb(page_address(page) + adapter->rx_page_offset, 1671 adapter->rx_frag_size); 1672 if (likely(skb)) { 1673 skb_reserve(skb, NET_SKB_PAD); 1674 adapter->rx_page_offset += adapter->rx_frag_size; 1675 if (adapter->rx_page_offset >= PAGE_SIZE) 1676 adapter->rx_page = NULL; 1677 else 1678 get_page(page); 1679 } 1680 return skb; 1681 } 1682 1683 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter) 1684 { 1685 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1686 struct pci_dev *pdev = adapter->pdev; 1687 struct atl1c_buffer *buffer_info, *next_info; 1688 struct sk_buff *skb; 1689 void *vir_addr = NULL; 1690 u16 num_alloc = 0; 1691 u16 rfd_next_to_use, next_next; 1692 struct atl1c_rx_free_desc *rfd_desc; 1693 dma_addr_t mapping; 1694 1695 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1696 if (++next_next == rfd_ring->count) 1697 next_next = 0; 1698 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1699 next_info = &rfd_ring->buffer_info[next_next]; 1700 1701 while (next_info->flags & ATL1C_BUFFER_FREE) { 1702 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1703 1704 skb = atl1c_alloc_skb(adapter); 1705 if (unlikely(!skb)) { 1706 if (netif_msg_rx_err(adapter)) 1707 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1708 break; 1709 } 1710 1711 /* 1712 * Make buffer alignment 2 beyond a 16 byte boundary 1713 * this will result in a 16 byte aligned IP header after 1714 * the 14 byte MAC header is removed 1715 */ 1716 vir_addr = skb->data; 1717 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1718 buffer_info->skb = skb; 1719 buffer_info->length = adapter->rx_buffer_len; 1720 mapping = pci_map_single(pdev, vir_addr, 1721 buffer_info->length, 1722 PCI_DMA_FROMDEVICE); 1723 if (unlikely(pci_dma_mapping_error(pdev, mapping))) { 1724 dev_kfree_skb(skb); 1725 buffer_info->skb = NULL; 1726 buffer_info->length = 0; 1727 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1728 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1729 break; 1730 } 1731 buffer_info->dma = mapping; 1732 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1733 ATL1C_PCIMAP_FROMDEVICE); 1734 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1735 rfd_next_to_use = next_next; 1736 if (++next_next == rfd_ring->count) 1737 next_next = 0; 1738 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1739 next_info = &rfd_ring->buffer_info[next_next]; 1740 num_alloc++; 1741 } 1742 1743 if (num_alloc) { 1744 /* TODO: update mailbox here */ 1745 wmb(); 1746 rfd_ring->next_to_use = rfd_next_to_use; 1747 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1748 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1749 } 1750 1751 return num_alloc; 1752 } 1753 1754 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1755 struct atl1c_recv_ret_status *rrs, u16 num) 1756 { 1757 u16 i; 1758 /* the relationship between rrd and rfd is one map one */ 1759 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1760 rrd_ring->next_to_clean)) { 1761 rrs->word3 &= ~RRS_RXD_UPDATED; 1762 if (++rrd_ring->next_to_clean == rrd_ring->count) 1763 rrd_ring->next_to_clean = 0; 1764 } 1765 } 1766 1767 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1768 struct atl1c_recv_ret_status *rrs, u16 num) 1769 { 1770 u16 i; 1771 u16 rfd_index; 1772 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1773 1774 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1775 RRS_RX_RFD_INDEX_MASK; 1776 for (i = 0; i < num; i++) { 1777 buffer_info[rfd_index].skb = NULL; 1778 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1779 ATL1C_BUFFER_FREE); 1780 if (++rfd_index == rfd_ring->count) 1781 rfd_index = 0; 1782 } 1783 rfd_ring->next_to_clean = rfd_index; 1784 } 1785 1786 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1787 int *work_done, int work_to_do) 1788 { 1789 u16 rfd_num, rfd_index; 1790 u16 count = 0; 1791 u16 length; 1792 struct pci_dev *pdev = adapter->pdev; 1793 struct net_device *netdev = adapter->netdev; 1794 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1795 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1796 struct sk_buff *skb; 1797 struct atl1c_recv_ret_status *rrs; 1798 struct atl1c_buffer *buffer_info; 1799 1800 while (1) { 1801 if (*work_done >= work_to_do) 1802 break; 1803 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1804 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1805 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1806 RRS_RX_RFD_CNT_MASK; 1807 if (unlikely(rfd_num != 1)) 1808 /* TODO support mul rfd*/ 1809 if (netif_msg_rx_err(adapter)) 1810 dev_warn(&pdev->dev, 1811 "Multi rfd not support yet!\n"); 1812 goto rrs_checked; 1813 } else { 1814 break; 1815 } 1816 rrs_checked: 1817 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1818 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1819 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1820 if (netif_msg_rx_err(adapter)) 1821 dev_warn(&pdev->dev, 1822 "wrong packet! rrs word3 is %x\n", 1823 rrs->word3); 1824 continue; 1825 } 1826 1827 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1828 RRS_PKT_SIZE_MASK); 1829 /* Good Receive */ 1830 if (likely(rfd_num == 1)) { 1831 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1832 RRS_RX_RFD_INDEX_MASK; 1833 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1834 pci_unmap_single(pdev, buffer_info->dma, 1835 buffer_info->length, PCI_DMA_FROMDEVICE); 1836 skb = buffer_info->skb; 1837 } else { 1838 /* TODO */ 1839 if (netif_msg_rx_err(adapter)) 1840 dev_warn(&pdev->dev, 1841 "Multi rfd not support yet!\n"); 1842 break; 1843 } 1844 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1845 skb_put(skb, length - ETH_FCS_LEN); 1846 skb->protocol = eth_type_trans(skb, netdev); 1847 atl1c_rx_checksum(adapter, skb, rrs); 1848 if (rrs->word3 & RRS_VLAN_INS) { 1849 u16 vlan; 1850 1851 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1852 vlan = le16_to_cpu(vlan); 1853 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1854 } 1855 netif_receive_skb(skb); 1856 1857 (*work_done)++; 1858 count++; 1859 } 1860 if (count) 1861 atl1c_alloc_rx_buffer(adapter); 1862 } 1863 1864 /** 1865 * atl1c_clean - NAPI Rx polling callback 1866 */ 1867 static int atl1c_clean(struct napi_struct *napi, int budget) 1868 { 1869 struct atl1c_adapter *adapter = 1870 container_of(napi, struct atl1c_adapter, napi); 1871 int work_done = 0; 1872 1873 /* Keep link state information with original netdev */ 1874 if (!netif_carrier_ok(adapter->netdev)) 1875 goto quit_polling; 1876 /* just enable one RXQ */ 1877 atl1c_clean_rx_irq(adapter, &work_done, budget); 1878 1879 if (work_done < budget) { 1880 quit_polling: 1881 napi_complete_done(napi, work_done); 1882 adapter->hw.intr_mask |= ISR_RX_PKT; 1883 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1884 } 1885 return work_done; 1886 } 1887 1888 #ifdef CONFIG_NET_POLL_CONTROLLER 1889 1890 /* 1891 * Polling 'interrupt' - used by things like netconsole to send skbs 1892 * without having to re-enable interrupts. It's not called while 1893 * the interrupt routine is executing. 1894 */ 1895 static void atl1c_netpoll(struct net_device *netdev) 1896 { 1897 struct atl1c_adapter *adapter = netdev_priv(netdev); 1898 1899 disable_irq(adapter->pdev->irq); 1900 atl1c_intr(adapter->pdev->irq, netdev); 1901 enable_irq(adapter->pdev->irq); 1902 } 1903 #endif 1904 1905 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1906 { 1907 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1908 u16 next_to_use = 0; 1909 u16 next_to_clean = 0; 1910 1911 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1912 next_to_use = tpd_ring->next_to_use; 1913 1914 return (u16)(next_to_clean > next_to_use) ? 1915 (next_to_clean - next_to_use - 1) : 1916 (tpd_ring->count + next_to_clean - next_to_use - 1); 1917 } 1918 1919 /* 1920 * get next usable tpd 1921 * Note: should call atl1c_tdp_avail to make sure 1922 * there is enough tpd to use 1923 */ 1924 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1925 enum atl1c_trans_queue type) 1926 { 1927 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1928 struct atl1c_tpd_desc *tpd_desc; 1929 u16 next_to_use = 0; 1930 1931 next_to_use = tpd_ring->next_to_use; 1932 if (++tpd_ring->next_to_use == tpd_ring->count) 1933 tpd_ring->next_to_use = 0; 1934 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1935 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1936 return tpd_desc; 1937 } 1938 1939 static struct atl1c_buffer * 1940 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1941 { 1942 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1943 1944 return &tpd_ring->buffer_info[tpd - 1945 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1946 } 1947 1948 /* Calculate the transmit packet descript needed*/ 1949 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1950 { 1951 u16 tpd_req; 1952 u16 proto_hdr_len = 0; 1953 1954 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1955 1956 if (skb_is_gso(skb)) { 1957 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1958 if (proto_hdr_len < skb_headlen(skb)) 1959 tpd_req++; 1960 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1961 tpd_req++; 1962 } 1963 return tpd_req; 1964 } 1965 1966 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1967 struct sk_buff *skb, 1968 struct atl1c_tpd_desc **tpd, 1969 enum atl1c_trans_queue type) 1970 { 1971 struct pci_dev *pdev = adapter->pdev; 1972 unsigned short offload_type; 1973 u8 hdr_len; 1974 u32 real_len; 1975 1976 if (skb_is_gso(skb)) { 1977 int err; 1978 1979 err = skb_cow_head(skb, 0); 1980 if (err < 0) 1981 return err; 1982 1983 offload_type = skb_shinfo(skb)->gso_type; 1984 1985 if (offload_type & SKB_GSO_TCPV4) { 1986 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1987 + ntohs(ip_hdr(skb)->tot_len)); 1988 1989 if (real_len < skb->len) 1990 pskb_trim(skb, real_len); 1991 1992 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1993 if (unlikely(skb->len == hdr_len)) { 1994 /* only xsum need */ 1995 if (netif_msg_tx_queued(adapter)) 1996 dev_warn(&pdev->dev, 1997 "IPV4 tso with zero data??\n"); 1998 goto check_sum; 1999 } else { 2000 ip_hdr(skb)->check = 0; 2001 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2002 ip_hdr(skb)->saddr, 2003 ip_hdr(skb)->daddr, 2004 0, IPPROTO_TCP, 0); 2005 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2006 } 2007 } 2008 2009 if (offload_type & SKB_GSO_TCPV6) { 2010 struct atl1c_tpd_ext_desc *etpd = 2011 *(struct atl1c_tpd_ext_desc **)(tpd); 2012 2013 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2014 *tpd = atl1c_get_tpd(adapter, type); 2015 ipv6_hdr(skb)->payload_len = 0; 2016 /* check payload == 0 byte ? */ 2017 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2018 if (unlikely(skb->len == hdr_len)) { 2019 /* only xsum need */ 2020 if (netif_msg_tx_queued(adapter)) 2021 dev_warn(&pdev->dev, 2022 "IPV6 tso with zero data??\n"); 2023 goto check_sum; 2024 } else 2025 tcp_v6_gso_csum_prep(skb); 2026 2027 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2028 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2029 etpd->pkt_len = cpu_to_le32(skb->len); 2030 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2031 } 2032 2033 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2034 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2035 TPD_TCPHDR_OFFSET_SHIFT; 2036 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2037 TPD_MSS_SHIFT; 2038 return 0; 2039 } 2040 2041 check_sum: 2042 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2043 u8 css, cso; 2044 cso = skb_checksum_start_offset(skb); 2045 2046 if (unlikely(cso & 0x1)) { 2047 if (netif_msg_tx_err(adapter)) 2048 dev_err(&adapter->pdev->dev, 2049 "payload offset should not an event number\n"); 2050 return -1; 2051 } else { 2052 css = cso + skb->csum_offset; 2053 2054 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2055 TPD_PLOADOFFSET_SHIFT; 2056 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2057 TPD_CCSUM_OFFSET_SHIFT; 2058 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2059 } 2060 } 2061 return 0; 2062 } 2063 2064 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2065 struct atl1c_tpd_desc *first_tpd, 2066 enum atl1c_trans_queue type) 2067 { 2068 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2069 struct atl1c_buffer *buffer_info; 2070 struct atl1c_tpd_desc *tpd; 2071 u16 first_index, index; 2072 2073 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2074 index = first_index; 2075 while (index != tpd_ring->next_to_use) { 2076 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2077 buffer_info = &tpd_ring->buffer_info[index]; 2078 atl1c_clean_buffer(adpt->pdev, buffer_info); 2079 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2080 if (++index == tpd_ring->count) 2081 index = 0; 2082 } 2083 tpd_ring->next_to_use = first_index; 2084 } 2085 2086 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2087 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2088 enum atl1c_trans_queue type) 2089 { 2090 struct atl1c_tpd_desc *use_tpd = NULL; 2091 struct atl1c_buffer *buffer_info = NULL; 2092 u16 buf_len = skb_headlen(skb); 2093 u16 map_len = 0; 2094 u16 mapped_len = 0; 2095 u16 hdr_len = 0; 2096 u16 nr_frags; 2097 u16 f; 2098 int tso; 2099 2100 nr_frags = skb_shinfo(skb)->nr_frags; 2101 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2102 if (tso) { 2103 /* TSO */ 2104 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2105 use_tpd = tpd; 2106 2107 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2108 buffer_info->length = map_len; 2109 buffer_info->dma = pci_map_single(adapter->pdev, 2110 skb->data, hdr_len, PCI_DMA_TODEVICE); 2111 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2112 buffer_info->dma))) 2113 goto err_dma; 2114 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2115 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2116 ATL1C_PCIMAP_TODEVICE); 2117 mapped_len += map_len; 2118 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2119 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2120 } 2121 2122 if (mapped_len < buf_len) { 2123 /* mapped_len == 0, means we should use the first tpd, 2124 which is given by caller */ 2125 if (mapped_len == 0) 2126 use_tpd = tpd; 2127 else { 2128 use_tpd = atl1c_get_tpd(adapter, type); 2129 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2130 } 2131 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2132 buffer_info->length = buf_len - mapped_len; 2133 buffer_info->dma = 2134 pci_map_single(adapter->pdev, skb->data + mapped_len, 2135 buffer_info->length, PCI_DMA_TODEVICE); 2136 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2137 buffer_info->dma))) 2138 goto err_dma; 2139 2140 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2141 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2142 ATL1C_PCIMAP_TODEVICE); 2143 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2144 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2145 } 2146 2147 for (f = 0; f < nr_frags; f++) { 2148 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2149 2150 use_tpd = atl1c_get_tpd(adapter, type); 2151 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2152 2153 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2154 buffer_info->length = skb_frag_size(frag); 2155 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2156 frag, 0, 2157 buffer_info->length, 2158 DMA_TO_DEVICE); 2159 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2160 goto err_dma; 2161 2162 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2163 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2164 ATL1C_PCIMAP_TODEVICE); 2165 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2166 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2167 } 2168 2169 /* The last tpd */ 2170 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2171 /* The last buffer info contain the skb address, 2172 so it will be free after unmap */ 2173 buffer_info->skb = skb; 2174 2175 return 0; 2176 2177 err_dma: 2178 buffer_info->dma = 0; 2179 buffer_info->length = 0; 2180 return -1; 2181 } 2182 2183 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2184 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2185 { 2186 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2187 u16 reg; 2188 2189 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2190 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2191 } 2192 2193 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2194 struct net_device *netdev) 2195 { 2196 struct atl1c_adapter *adapter = netdev_priv(netdev); 2197 u16 tpd_req; 2198 struct atl1c_tpd_desc *tpd; 2199 enum atl1c_trans_queue type = atl1c_trans_normal; 2200 2201 if (test_bit(__AT_DOWN, &adapter->flags)) { 2202 dev_kfree_skb_any(skb); 2203 return NETDEV_TX_OK; 2204 } 2205 2206 tpd_req = atl1c_cal_tpd_req(skb); 2207 2208 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2209 /* no enough descriptor, just stop queue */ 2210 netif_stop_queue(netdev); 2211 return NETDEV_TX_BUSY; 2212 } 2213 2214 tpd = atl1c_get_tpd(adapter, type); 2215 2216 /* do TSO and check sum */ 2217 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2218 dev_kfree_skb_any(skb); 2219 return NETDEV_TX_OK; 2220 } 2221 2222 if (unlikely(skb_vlan_tag_present(skb))) { 2223 u16 vlan = skb_vlan_tag_get(skb); 2224 __le16 tag; 2225 2226 vlan = cpu_to_le16(vlan); 2227 AT_VLAN_TO_TAG(vlan, tag); 2228 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2229 tpd->vlan_tag = tag; 2230 } 2231 2232 if (skb_network_offset(skb) != ETH_HLEN) 2233 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2234 2235 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2236 netif_info(adapter, tx_done, adapter->netdev, 2237 "tx-skb dropped due to dma error\n"); 2238 /* roll back tpd/buffer */ 2239 atl1c_tx_rollback(adapter, tpd, type); 2240 dev_kfree_skb_any(skb); 2241 } else { 2242 netdev_sent_queue(adapter->netdev, skb->len); 2243 atl1c_tx_queue(adapter, skb, tpd, type); 2244 } 2245 2246 return NETDEV_TX_OK; 2247 } 2248 2249 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2250 { 2251 struct net_device *netdev = adapter->netdev; 2252 2253 free_irq(adapter->pdev->irq, netdev); 2254 2255 if (adapter->have_msi) 2256 pci_disable_msi(adapter->pdev); 2257 } 2258 2259 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2260 { 2261 struct pci_dev *pdev = adapter->pdev; 2262 struct net_device *netdev = adapter->netdev; 2263 int flags = 0; 2264 int err = 0; 2265 2266 adapter->have_msi = true; 2267 err = pci_enable_msi(adapter->pdev); 2268 if (err) { 2269 if (netif_msg_ifup(adapter)) 2270 dev_err(&pdev->dev, 2271 "Unable to allocate MSI interrupt Error: %d\n", 2272 err); 2273 adapter->have_msi = false; 2274 } 2275 2276 if (!adapter->have_msi) 2277 flags |= IRQF_SHARED; 2278 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2279 netdev->name, netdev); 2280 if (err) { 2281 if (netif_msg_ifup(adapter)) 2282 dev_err(&pdev->dev, 2283 "Unable to allocate interrupt Error: %d\n", 2284 err); 2285 if (adapter->have_msi) 2286 pci_disable_msi(adapter->pdev); 2287 return err; 2288 } 2289 if (netif_msg_ifup(adapter)) 2290 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2291 return err; 2292 } 2293 2294 2295 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2296 { 2297 /* release tx-pending skbs and reset tx/rx ring index */ 2298 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2299 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2300 atl1c_clean_rx_ring(adapter); 2301 } 2302 2303 static int atl1c_up(struct atl1c_adapter *adapter) 2304 { 2305 struct net_device *netdev = adapter->netdev; 2306 int err; 2307 2308 netif_carrier_off(netdev); 2309 2310 err = atl1c_configure(adapter); 2311 if (unlikely(err)) 2312 goto err_up; 2313 2314 err = atl1c_request_irq(adapter); 2315 if (unlikely(err)) 2316 goto err_up; 2317 2318 atl1c_check_link_status(adapter); 2319 clear_bit(__AT_DOWN, &adapter->flags); 2320 napi_enable(&adapter->napi); 2321 atl1c_irq_enable(adapter); 2322 netif_start_queue(netdev); 2323 return err; 2324 2325 err_up: 2326 atl1c_clean_rx_ring(adapter); 2327 return err; 2328 } 2329 2330 static void atl1c_down(struct atl1c_adapter *adapter) 2331 { 2332 struct net_device *netdev = adapter->netdev; 2333 2334 atl1c_del_timer(adapter); 2335 adapter->work_event = 0; /* clear all event */ 2336 /* signal that we're down so the interrupt handler does not 2337 * reschedule our watchdog timer */ 2338 set_bit(__AT_DOWN, &adapter->flags); 2339 netif_carrier_off(netdev); 2340 napi_disable(&adapter->napi); 2341 atl1c_irq_disable(adapter); 2342 atl1c_free_irq(adapter); 2343 /* disable ASPM if device inactive */ 2344 atl1c_disable_l0s_l1(&adapter->hw); 2345 /* reset MAC to disable all RX/TX */ 2346 atl1c_reset_mac(&adapter->hw); 2347 msleep(1); 2348 2349 adapter->link_speed = SPEED_0; 2350 adapter->link_duplex = -1; 2351 atl1c_reset_dma_ring(adapter); 2352 } 2353 2354 /** 2355 * atl1c_open - Called when a network interface is made active 2356 * @netdev: network interface device structure 2357 * 2358 * Returns 0 on success, negative value on failure 2359 * 2360 * The open entry point is called when a network interface is made 2361 * active by the system (IFF_UP). At this point all resources needed 2362 * for transmit and receive operations are allocated, the interrupt 2363 * handler is registered with the OS, the watchdog timer is started, 2364 * and the stack is notified that the interface is ready. 2365 */ 2366 static int atl1c_open(struct net_device *netdev) 2367 { 2368 struct atl1c_adapter *adapter = netdev_priv(netdev); 2369 int err; 2370 2371 /* disallow open during test */ 2372 if (test_bit(__AT_TESTING, &adapter->flags)) 2373 return -EBUSY; 2374 2375 /* allocate rx/tx dma buffer & descriptors */ 2376 err = atl1c_setup_ring_resources(adapter); 2377 if (unlikely(err)) 2378 return err; 2379 2380 err = atl1c_up(adapter); 2381 if (unlikely(err)) 2382 goto err_up; 2383 2384 return 0; 2385 2386 err_up: 2387 atl1c_free_irq(adapter); 2388 atl1c_free_ring_resources(adapter); 2389 atl1c_reset_mac(&adapter->hw); 2390 return err; 2391 } 2392 2393 /** 2394 * atl1c_close - Disables a network interface 2395 * @netdev: network interface device structure 2396 * 2397 * Returns 0, this is not allowed to fail 2398 * 2399 * The close entry point is called when an interface is de-activated 2400 * by the OS. The hardware is still under the drivers control, but 2401 * needs to be disabled. A global MAC reset is issued to stop the 2402 * hardware, and all transmit and receive resources are freed. 2403 */ 2404 static int atl1c_close(struct net_device *netdev) 2405 { 2406 struct atl1c_adapter *adapter = netdev_priv(netdev); 2407 2408 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2409 set_bit(__AT_DOWN, &adapter->flags); 2410 cancel_work_sync(&adapter->common_task); 2411 atl1c_down(adapter); 2412 atl1c_free_ring_resources(adapter); 2413 return 0; 2414 } 2415 2416 static int atl1c_suspend(struct device *dev) 2417 { 2418 struct net_device *netdev = dev_get_drvdata(dev); 2419 struct atl1c_adapter *adapter = netdev_priv(netdev); 2420 struct atl1c_hw *hw = &adapter->hw; 2421 u32 wufc = adapter->wol; 2422 2423 atl1c_disable_l0s_l1(hw); 2424 if (netif_running(netdev)) { 2425 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2426 atl1c_down(adapter); 2427 } 2428 netif_device_detach(netdev); 2429 2430 if (wufc) 2431 if (atl1c_phy_to_ps_link(hw) != 0) 2432 dev_dbg(dev, "phy power saving failed"); 2433 2434 atl1c_power_saving(hw, wufc); 2435 2436 return 0; 2437 } 2438 2439 #ifdef CONFIG_PM_SLEEP 2440 static int atl1c_resume(struct device *dev) 2441 { 2442 struct net_device *netdev = dev_get_drvdata(dev); 2443 struct atl1c_adapter *adapter = netdev_priv(netdev); 2444 2445 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2446 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2447 2448 atl1c_phy_reset(&adapter->hw); 2449 atl1c_reset_mac(&adapter->hw); 2450 atl1c_phy_init(&adapter->hw); 2451 2452 netif_device_attach(netdev); 2453 if (netif_running(netdev)) 2454 atl1c_up(adapter); 2455 2456 return 0; 2457 } 2458 #endif 2459 2460 static void atl1c_shutdown(struct pci_dev *pdev) 2461 { 2462 struct net_device *netdev = pci_get_drvdata(pdev); 2463 struct atl1c_adapter *adapter = netdev_priv(netdev); 2464 2465 atl1c_suspend(&pdev->dev); 2466 pci_wake_from_d3(pdev, adapter->wol); 2467 pci_set_power_state(pdev, PCI_D3hot); 2468 } 2469 2470 static const struct net_device_ops atl1c_netdev_ops = { 2471 .ndo_open = atl1c_open, 2472 .ndo_stop = atl1c_close, 2473 .ndo_validate_addr = eth_validate_addr, 2474 .ndo_start_xmit = atl1c_xmit_frame, 2475 .ndo_set_mac_address = atl1c_set_mac_addr, 2476 .ndo_set_rx_mode = atl1c_set_multi, 2477 .ndo_change_mtu = atl1c_change_mtu, 2478 .ndo_fix_features = atl1c_fix_features, 2479 .ndo_set_features = atl1c_set_features, 2480 .ndo_do_ioctl = atl1c_ioctl, 2481 .ndo_tx_timeout = atl1c_tx_timeout, 2482 .ndo_get_stats = atl1c_get_stats, 2483 #ifdef CONFIG_NET_POLL_CONTROLLER 2484 .ndo_poll_controller = atl1c_netpoll, 2485 #endif 2486 }; 2487 2488 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2489 { 2490 SET_NETDEV_DEV(netdev, &pdev->dev); 2491 pci_set_drvdata(pdev, netdev); 2492 2493 netdev->netdev_ops = &atl1c_netdev_ops; 2494 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2495 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 2496 atl1c_set_ethtool_ops(netdev); 2497 2498 /* TODO: add when ready */ 2499 netdev->hw_features = NETIF_F_SG | 2500 NETIF_F_HW_CSUM | 2501 NETIF_F_HW_VLAN_CTAG_RX | 2502 NETIF_F_TSO | 2503 NETIF_F_TSO6; 2504 netdev->features = netdev->hw_features | 2505 NETIF_F_HW_VLAN_CTAG_TX; 2506 return 0; 2507 } 2508 2509 /** 2510 * atl1c_probe - Device Initialization Routine 2511 * @pdev: PCI device information struct 2512 * @ent: entry in atl1c_pci_tbl 2513 * 2514 * Returns 0 on success, negative on failure 2515 * 2516 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2517 * The OS initialization, configuring of the adapter private structure, 2518 * and a hardware reset occur. 2519 */ 2520 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2521 { 2522 struct net_device *netdev; 2523 struct atl1c_adapter *adapter; 2524 static int cards_found; 2525 2526 int err = 0; 2527 2528 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2529 err = pci_enable_device_mem(pdev); 2530 if (err) { 2531 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2532 return err; 2533 } 2534 2535 /* 2536 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2537 * shared register for the high 32 bits, so only a single, aligned, 2538 * 4 GB physical address range can be used at a time. 2539 * 2540 * Supporting 64-bit DMA on this hardware is more trouble than it's 2541 * worth. It is far easier to limit to 32-bit DMA than update 2542 * various kernel subsystems to support the mechanics required by a 2543 * fixed-high-32-bit system. 2544 */ 2545 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || 2546 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) { 2547 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2548 goto err_dma; 2549 } 2550 2551 err = pci_request_regions(pdev, atl1c_driver_name); 2552 if (err) { 2553 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2554 goto err_pci_reg; 2555 } 2556 2557 pci_set_master(pdev); 2558 2559 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2560 if (netdev == NULL) { 2561 err = -ENOMEM; 2562 goto err_alloc_etherdev; 2563 } 2564 2565 err = atl1c_init_netdev(netdev, pdev); 2566 if (err) { 2567 dev_err(&pdev->dev, "init netdevice failed\n"); 2568 goto err_init_netdev; 2569 } 2570 adapter = netdev_priv(netdev); 2571 adapter->bd_number = cards_found; 2572 adapter->netdev = netdev; 2573 adapter->pdev = pdev; 2574 adapter->hw.adapter = adapter; 2575 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2576 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2577 if (!adapter->hw.hw_addr) { 2578 err = -EIO; 2579 dev_err(&pdev->dev, "cannot map device registers\n"); 2580 goto err_ioremap; 2581 } 2582 2583 /* init mii data */ 2584 adapter->mii.dev = netdev; 2585 adapter->mii.mdio_read = atl1c_mdio_read; 2586 adapter->mii.mdio_write = atl1c_mdio_write; 2587 adapter->mii.phy_id_mask = 0x1f; 2588 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2589 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2590 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2591 /* setup the private structure */ 2592 err = atl1c_sw_init(adapter); 2593 if (err) { 2594 dev_err(&pdev->dev, "net device private data init failed\n"); 2595 goto err_sw_init; 2596 } 2597 /* set max MTU */ 2598 atl1c_set_max_mtu(netdev); 2599 2600 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2601 2602 /* Init GPHY as early as possible due to power saving issue */ 2603 atl1c_phy_reset(&adapter->hw); 2604 2605 err = atl1c_reset_mac(&adapter->hw); 2606 if (err) { 2607 err = -EIO; 2608 goto err_reset; 2609 } 2610 2611 /* reset the controller to 2612 * put the device in a known good starting state */ 2613 err = atl1c_phy_init(&adapter->hw); 2614 if (err) { 2615 err = -EIO; 2616 goto err_reset; 2617 } 2618 if (atl1c_read_mac_addr(&adapter->hw)) { 2619 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2620 netdev->addr_assign_type = NET_ADDR_RANDOM; 2621 } 2622 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2623 if (netif_msg_probe(adapter)) 2624 dev_dbg(&pdev->dev, "mac address : %pM\n", 2625 adapter->hw.mac_addr); 2626 2627 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2628 INIT_WORK(&adapter->common_task, atl1c_common_task); 2629 adapter->work_event = 0; 2630 err = register_netdev(netdev); 2631 if (err) { 2632 dev_err(&pdev->dev, "register netdevice failed\n"); 2633 goto err_register; 2634 } 2635 2636 cards_found++; 2637 return 0; 2638 2639 err_reset: 2640 err_register: 2641 err_sw_init: 2642 iounmap(adapter->hw.hw_addr); 2643 err_init_netdev: 2644 err_ioremap: 2645 free_netdev(netdev); 2646 err_alloc_etherdev: 2647 pci_release_regions(pdev); 2648 err_pci_reg: 2649 err_dma: 2650 pci_disable_device(pdev); 2651 return err; 2652 } 2653 2654 /** 2655 * atl1c_remove - Device Removal Routine 2656 * @pdev: PCI device information struct 2657 * 2658 * atl1c_remove is called by the PCI subsystem to alert the driver 2659 * that it should release a PCI device. The could be caused by a 2660 * Hot-Plug event, or because the driver is going to be removed from 2661 * memory. 2662 */ 2663 static void atl1c_remove(struct pci_dev *pdev) 2664 { 2665 struct net_device *netdev = pci_get_drvdata(pdev); 2666 struct atl1c_adapter *adapter = netdev_priv(netdev); 2667 2668 unregister_netdev(netdev); 2669 /* restore permanent address */ 2670 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2671 atl1c_phy_disable(&adapter->hw); 2672 2673 iounmap(adapter->hw.hw_addr); 2674 2675 pci_release_regions(pdev); 2676 pci_disable_device(pdev); 2677 free_netdev(netdev); 2678 } 2679 2680 /** 2681 * atl1c_io_error_detected - called when PCI error is detected 2682 * @pdev: Pointer to PCI device 2683 * @state: The current pci connection state 2684 * 2685 * This function is called after a PCI bus error affecting 2686 * this device has been detected. 2687 */ 2688 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2689 pci_channel_state_t state) 2690 { 2691 struct net_device *netdev = pci_get_drvdata(pdev); 2692 struct atl1c_adapter *adapter = netdev_priv(netdev); 2693 2694 netif_device_detach(netdev); 2695 2696 if (state == pci_channel_io_perm_failure) 2697 return PCI_ERS_RESULT_DISCONNECT; 2698 2699 if (netif_running(netdev)) 2700 atl1c_down(adapter); 2701 2702 pci_disable_device(pdev); 2703 2704 /* Request a slot slot reset. */ 2705 return PCI_ERS_RESULT_NEED_RESET; 2706 } 2707 2708 /** 2709 * atl1c_io_slot_reset - called after the pci bus has been reset. 2710 * @pdev: Pointer to PCI device 2711 * 2712 * Restart the card from scratch, as if from a cold-boot. Implementation 2713 * resembles the first-half of the e1000_resume routine. 2714 */ 2715 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2716 { 2717 struct net_device *netdev = pci_get_drvdata(pdev); 2718 struct atl1c_adapter *adapter = netdev_priv(netdev); 2719 2720 if (pci_enable_device(pdev)) { 2721 if (netif_msg_hw(adapter)) 2722 dev_err(&pdev->dev, 2723 "Cannot re-enable PCI device after reset\n"); 2724 return PCI_ERS_RESULT_DISCONNECT; 2725 } 2726 pci_set_master(pdev); 2727 2728 pci_enable_wake(pdev, PCI_D3hot, 0); 2729 pci_enable_wake(pdev, PCI_D3cold, 0); 2730 2731 atl1c_reset_mac(&adapter->hw); 2732 2733 return PCI_ERS_RESULT_RECOVERED; 2734 } 2735 2736 /** 2737 * atl1c_io_resume - called when traffic can start flowing again. 2738 * @pdev: Pointer to PCI device 2739 * 2740 * This callback is called when the error recovery driver tells us that 2741 * its OK to resume normal operation. Implementation resembles the 2742 * second-half of the atl1c_resume routine. 2743 */ 2744 static void atl1c_io_resume(struct pci_dev *pdev) 2745 { 2746 struct net_device *netdev = pci_get_drvdata(pdev); 2747 struct atl1c_adapter *adapter = netdev_priv(netdev); 2748 2749 if (netif_running(netdev)) { 2750 if (atl1c_up(adapter)) { 2751 if (netif_msg_hw(adapter)) 2752 dev_err(&pdev->dev, 2753 "Cannot bring device back up after reset\n"); 2754 return; 2755 } 2756 } 2757 2758 netif_device_attach(netdev); 2759 } 2760 2761 static const struct pci_error_handlers atl1c_err_handler = { 2762 .error_detected = atl1c_io_error_detected, 2763 .slot_reset = atl1c_io_slot_reset, 2764 .resume = atl1c_io_resume, 2765 }; 2766 2767 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2768 2769 static struct pci_driver atl1c_driver = { 2770 .name = atl1c_driver_name, 2771 .id_table = atl1c_pci_tbl, 2772 .probe = atl1c_probe, 2773 .remove = atl1c_remove, 2774 .shutdown = atl1c_shutdown, 2775 .err_handler = &atl1c_err_handler, 2776 .driver.pm = &atl1c_pm_ops, 2777 }; 2778 2779 module_pci_driver(atl1c_driver); 2780