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 * @t: timer list containing pointer to netdev cast into an unsigned long 208 */ 209 static void atl1c_phy_config(struct timer_list *t) 210 { 211 struct atl1c_adapter *adapter = from_timer(adapter, t, 212 phy_config_timer); 213 struct atl1c_hw *hw = &adapter->hw; 214 unsigned long flags; 215 216 spin_lock_irqsave(&adapter->mdio_lock, flags); 217 atl1c_restart_autoneg(hw); 218 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 219 } 220 221 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 222 { 223 atl1c_down(adapter); 224 atl1c_up(adapter); 225 clear_bit(__AT_RESETTING, &adapter->flags); 226 } 227 228 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 229 { 230 struct atl1c_hw *hw = &adapter->hw; 231 struct net_device *netdev = adapter->netdev; 232 struct pci_dev *pdev = adapter->pdev; 233 int err; 234 unsigned long flags; 235 u16 speed, duplex, phy_data; 236 237 spin_lock_irqsave(&adapter->mdio_lock, flags); 238 /* MII_BMSR must read twise */ 239 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 240 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 241 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 242 243 if ((phy_data & BMSR_LSTATUS) == 0) { 244 /* link down */ 245 netif_carrier_off(netdev); 246 hw->hibernate = true; 247 if (atl1c_reset_mac(hw) != 0) 248 if (netif_msg_hw(adapter)) 249 dev_warn(&pdev->dev, "reset mac failed\n"); 250 atl1c_set_aspm(hw, SPEED_0); 251 atl1c_post_phy_linkchg(hw, SPEED_0); 252 atl1c_reset_dma_ring(adapter); 253 atl1c_configure(adapter); 254 } else { 255 /* Link Up */ 256 hw->hibernate = false; 257 spin_lock_irqsave(&adapter->mdio_lock, flags); 258 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 259 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 260 if (unlikely(err)) 261 return; 262 /* link result is our setting */ 263 if (adapter->link_speed != speed || 264 adapter->link_duplex != duplex) { 265 adapter->link_speed = speed; 266 adapter->link_duplex = duplex; 267 atl1c_set_aspm(hw, speed); 268 atl1c_post_phy_linkchg(hw, speed); 269 atl1c_start_mac(adapter); 270 if (netif_msg_link(adapter)) 271 dev_info(&pdev->dev, 272 "%s: %s NIC Link is Up<%d Mbps %s>\n", 273 atl1c_driver_name, netdev->name, 274 adapter->link_speed, 275 adapter->link_duplex == FULL_DUPLEX ? 276 "Full Duplex" : "Half Duplex"); 277 } 278 if (!netif_carrier_ok(netdev)) 279 netif_carrier_on(netdev); 280 } 281 } 282 283 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 284 { 285 struct net_device *netdev = adapter->netdev; 286 struct pci_dev *pdev = adapter->pdev; 287 u16 phy_data; 288 u16 link_up; 289 290 spin_lock(&adapter->mdio_lock); 291 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 292 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 293 spin_unlock(&adapter->mdio_lock); 294 link_up = phy_data & BMSR_LSTATUS; 295 /* notify upper layer link down ASAP */ 296 if (!link_up) { 297 if (netif_carrier_ok(netdev)) { 298 /* old link state: Up */ 299 netif_carrier_off(netdev); 300 if (netif_msg_link(adapter)) 301 dev_info(&pdev->dev, 302 "%s: %s NIC Link is Down\n", 303 atl1c_driver_name, netdev->name); 304 adapter->link_speed = SPEED_0; 305 } 306 } 307 308 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 309 schedule_work(&adapter->common_task); 310 } 311 312 static void atl1c_common_task(struct work_struct *work) 313 { 314 struct atl1c_adapter *adapter; 315 struct net_device *netdev; 316 317 adapter = container_of(work, struct atl1c_adapter, common_task); 318 netdev = adapter->netdev; 319 320 if (test_bit(__AT_DOWN, &adapter->flags)) 321 return; 322 323 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 324 netif_device_detach(netdev); 325 atl1c_down(adapter); 326 atl1c_up(adapter); 327 netif_device_attach(netdev); 328 } 329 330 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 331 &adapter->work_event)) { 332 atl1c_irq_disable(adapter); 333 atl1c_check_link_status(adapter); 334 atl1c_irq_enable(adapter); 335 } 336 } 337 338 339 static void atl1c_del_timer(struct atl1c_adapter *adapter) 340 { 341 del_timer_sync(&adapter->phy_config_timer); 342 } 343 344 345 /** 346 * atl1c_tx_timeout - Respond to a Tx Hang 347 * @netdev: network interface device structure 348 * @txqueue: index of hanging tx queue 349 */ 350 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue) 351 { 352 struct atl1c_adapter *adapter = netdev_priv(netdev); 353 354 /* Do the reset outside of interrupt context */ 355 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 356 schedule_work(&adapter->common_task); 357 } 358 359 /** 360 * atl1c_set_multi - Multicast and Promiscuous mode set 361 * @netdev: network interface device structure 362 * 363 * The set_multi entry point is called whenever the multicast address 364 * list or the network interface flags are updated. This routine is 365 * responsible for configuring the hardware for proper multicast, 366 * promiscuous mode, and all-multi behavior. 367 */ 368 static void atl1c_set_multi(struct net_device *netdev) 369 { 370 struct atl1c_adapter *adapter = netdev_priv(netdev); 371 struct atl1c_hw *hw = &adapter->hw; 372 struct netdev_hw_addr *ha; 373 u32 mac_ctrl_data; 374 u32 hash_value; 375 376 /* Check for Promiscuous and All Multicast modes */ 377 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 378 379 if (netdev->flags & IFF_PROMISC) { 380 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 381 } else if (netdev->flags & IFF_ALLMULTI) { 382 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 383 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 384 } else { 385 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 386 } 387 388 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 389 390 /* clear the old settings from the multicast hash table */ 391 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 392 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 393 394 /* comoute mc addresses' hash value ,and put it into hash table */ 395 netdev_for_each_mc_addr(ha, netdev) { 396 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 397 atl1c_hash_set(hw, hash_value); 398 } 399 } 400 401 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 402 { 403 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 404 /* enable VLAN tag insert/strip */ 405 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 406 } else { 407 /* disable VLAN tag insert/strip */ 408 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 409 } 410 } 411 412 static void atl1c_vlan_mode(struct net_device *netdev, 413 netdev_features_t features) 414 { 415 struct atl1c_adapter *adapter = netdev_priv(netdev); 416 struct pci_dev *pdev = adapter->pdev; 417 u32 mac_ctrl_data = 0; 418 419 if (netif_msg_pktdata(adapter)) 420 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 421 422 atl1c_irq_disable(adapter); 423 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 424 __atl1c_vlan_mode(features, &mac_ctrl_data); 425 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 426 atl1c_irq_enable(adapter); 427 } 428 429 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 430 { 431 struct pci_dev *pdev = adapter->pdev; 432 433 if (netif_msg_pktdata(adapter)) 434 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 435 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 436 } 437 438 /** 439 * atl1c_set_mac - Change the Ethernet Address of the NIC 440 * @netdev: network interface device structure 441 * @p: pointer to an address structure 442 * 443 * Returns 0 on success, negative on failure 444 */ 445 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 446 { 447 struct atl1c_adapter *adapter = netdev_priv(netdev); 448 struct sockaddr *addr = p; 449 450 if (!is_valid_ether_addr(addr->sa_data)) 451 return -EADDRNOTAVAIL; 452 453 if (netif_running(netdev)) 454 return -EBUSY; 455 456 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 457 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 458 459 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 460 461 return 0; 462 } 463 464 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 465 struct net_device *dev) 466 { 467 unsigned int head_size; 468 int mtu = dev->mtu; 469 470 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 471 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 472 473 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) + 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 * @type: type of transmit queue 850 */ 851 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 852 enum atl1c_trans_queue type) 853 { 854 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 855 struct atl1c_buffer *buffer_info; 856 struct pci_dev *pdev = adapter->pdev; 857 u16 index, ring_count; 858 859 ring_count = tpd_ring->count; 860 for (index = 0; index < ring_count; index++) { 861 buffer_info = &tpd_ring->buffer_info[index]; 862 atl1c_clean_buffer(pdev, buffer_info); 863 } 864 865 netdev_reset_queue(adapter->netdev); 866 867 /* Zero out Tx-buffers */ 868 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 869 ring_count); 870 atomic_set(&tpd_ring->next_to_clean, 0); 871 tpd_ring->next_to_use = 0; 872 } 873 874 /** 875 * atl1c_clean_rx_ring - Free rx-reservation skbs 876 * @adapter: board private structure 877 */ 878 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 879 { 880 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 881 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 882 struct atl1c_buffer *buffer_info; 883 struct pci_dev *pdev = adapter->pdev; 884 int j; 885 886 for (j = 0; j < rfd_ring->count; j++) { 887 buffer_info = &rfd_ring->buffer_info[j]; 888 atl1c_clean_buffer(pdev, buffer_info); 889 } 890 /* zero out the descriptor ring */ 891 memset(rfd_ring->desc, 0, rfd_ring->size); 892 rfd_ring->next_to_clean = 0; 893 rfd_ring->next_to_use = 0; 894 rrd_ring->next_to_use = 0; 895 rrd_ring->next_to_clean = 0; 896 } 897 898 /* 899 * Read / Write Ptr Initialize: 900 */ 901 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 902 { 903 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 904 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 905 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 906 struct atl1c_buffer *buffer_info; 907 int i, j; 908 909 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 910 tpd_ring[i].next_to_use = 0; 911 atomic_set(&tpd_ring[i].next_to_clean, 0); 912 buffer_info = tpd_ring[i].buffer_info; 913 for (j = 0; j < tpd_ring->count; j++) 914 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 915 ATL1C_BUFFER_FREE); 916 } 917 rfd_ring->next_to_use = 0; 918 rfd_ring->next_to_clean = 0; 919 rrd_ring->next_to_use = 0; 920 rrd_ring->next_to_clean = 0; 921 for (j = 0; j < rfd_ring->count; j++) { 922 buffer_info = &rfd_ring->buffer_info[j]; 923 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 924 } 925 } 926 927 /** 928 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 929 * @adapter: board private structure 930 * 931 * Free all transmit software resources 932 */ 933 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 934 { 935 struct pci_dev *pdev = adapter->pdev; 936 937 dma_free_coherent(&pdev->dev, adapter->ring_header.size, 938 adapter->ring_header.desc, 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 = dma_map_single(&pdev->dev, vir_addr, 1721 buffer_info->length, DMA_FROM_DEVICE); 1722 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) { 1723 dev_kfree_skb(skb); 1724 buffer_info->skb = NULL; 1725 buffer_info->length = 0; 1726 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1727 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1728 break; 1729 } 1730 buffer_info->dma = mapping; 1731 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1732 ATL1C_PCIMAP_FROMDEVICE); 1733 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1734 rfd_next_to_use = next_next; 1735 if (++next_next == rfd_ring->count) 1736 next_next = 0; 1737 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1738 next_info = &rfd_ring->buffer_info[next_next]; 1739 num_alloc++; 1740 } 1741 1742 if (num_alloc) { 1743 /* TODO: update mailbox here */ 1744 wmb(); 1745 rfd_ring->next_to_use = rfd_next_to_use; 1746 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1747 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1748 } 1749 1750 return num_alloc; 1751 } 1752 1753 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1754 struct atl1c_recv_ret_status *rrs, u16 num) 1755 { 1756 u16 i; 1757 /* the relationship between rrd and rfd is one map one */ 1758 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1759 rrd_ring->next_to_clean)) { 1760 rrs->word3 &= ~RRS_RXD_UPDATED; 1761 if (++rrd_ring->next_to_clean == rrd_ring->count) 1762 rrd_ring->next_to_clean = 0; 1763 } 1764 } 1765 1766 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1767 struct atl1c_recv_ret_status *rrs, u16 num) 1768 { 1769 u16 i; 1770 u16 rfd_index; 1771 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1772 1773 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1774 RRS_RX_RFD_INDEX_MASK; 1775 for (i = 0; i < num; i++) { 1776 buffer_info[rfd_index].skb = NULL; 1777 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1778 ATL1C_BUFFER_FREE); 1779 if (++rfd_index == rfd_ring->count) 1780 rfd_index = 0; 1781 } 1782 rfd_ring->next_to_clean = rfd_index; 1783 } 1784 1785 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1786 int *work_done, int work_to_do) 1787 { 1788 u16 rfd_num, rfd_index; 1789 u16 count = 0; 1790 u16 length; 1791 struct pci_dev *pdev = adapter->pdev; 1792 struct net_device *netdev = adapter->netdev; 1793 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1794 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1795 struct sk_buff *skb; 1796 struct atl1c_recv_ret_status *rrs; 1797 struct atl1c_buffer *buffer_info; 1798 1799 while (1) { 1800 if (*work_done >= work_to_do) 1801 break; 1802 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1803 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1804 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1805 RRS_RX_RFD_CNT_MASK; 1806 if (unlikely(rfd_num != 1)) 1807 /* TODO support mul rfd*/ 1808 if (netif_msg_rx_err(adapter)) 1809 dev_warn(&pdev->dev, 1810 "Multi rfd not support yet!\n"); 1811 goto rrs_checked; 1812 } else { 1813 break; 1814 } 1815 rrs_checked: 1816 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1817 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1818 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1819 if (netif_msg_rx_err(adapter)) 1820 dev_warn(&pdev->dev, 1821 "wrong packet! rrs word3 is %x\n", 1822 rrs->word3); 1823 continue; 1824 } 1825 1826 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1827 RRS_PKT_SIZE_MASK); 1828 /* Good Receive */ 1829 if (likely(rfd_num == 1)) { 1830 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1831 RRS_RX_RFD_INDEX_MASK; 1832 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1833 dma_unmap_single(&pdev->dev, buffer_info->dma, 1834 buffer_info->length, DMA_FROM_DEVICE); 1835 skb = buffer_info->skb; 1836 } else { 1837 /* TODO */ 1838 if (netif_msg_rx_err(adapter)) 1839 dev_warn(&pdev->dev, 1840 "Multi rfd not support yet!\n"); 1841 break; 1842 } 1843 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1844 skb_put(skb, length - ETH_FCS_LEN); 1845 skb->protocol = eth_type_trans(skb, netdev); 1846 atl1c_rx_checksum(adapter, skb, rrs); 1847 if (rrs->word3 & RRS_VLAN_INS) { 1848 u16 vlan; 1849 1850 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1851 vlan = le16_to_cpu(vlan); 1852 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1853 } 1854 netif_receive_skb(skb); 1855 1856 (*work_done)++; 1857 count++; 1858 } 1859 if (count) 1860 atl1c_alloc_rx_buffer(adapter); 1861 } 1862 1863 /** 1864 * atl1c_clean - NAPI Rx polling callback 1865 * @napi: napi info 1866 * @budget: limit of packets to clean 1867 */ 1868 static int atl1c_clean(struct napi_struct *napi, int budget) 1869 { 1870 struct atl1c_adapter *adapter = 1871 container_of(napi, struct atl1c_adapter, napi); 1872 int work_done = 0; 1873 1874 /* Keep link state information with original netdev */ 1875 if (!netif_carrier_ok(adapter->netdev)) 1876 goto quit_polling; 1877 /* just enable one RXQ */ 1878 atl1c_clean_rx_irq(adapter, &work_done, budget); 1879 1880 if (work_done < budget) { 1881 quit_polling: 1882 napi_complete_done(napi, work_done); 1883 adapter->hw.intr_mask |= ISR_RX_PKT; 1884 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1885 } 1886 return work_done; 1887 } 1888 1889 #ifdef CONFIG_NET_POLL_CONTROLLER 1890 1891 /* 1892 * Polling 'interrupt' - used by things like netconsole to send skbs 1893 * without having to re-enable interrupts. It's not called while 1894 * the interrupt routine is executing. 1895 */ 1896 static void atl1c_netpoll(struct net_device *netdev) 1897 { 1898 struct atl1c_adapter *adapter = netdev_priv(netdev); 1899 1900 disable_irq(adapter->pdev->irq); 1901 atl1c_intr(adapter->pdev->irq, netdev); 1902 enable_irq(adapter->pdev->irq); 1903 } 1904 #endif 1905 1906 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1907 { 1908 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1909 u16 next_to_use = 0; 1910 u16 next_to_clean = 0; 1911 1912 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1913 next_to_use = tpd_ring->next_to_use; 1914 1915 return (u16)(next_to_clean > next_to_use) ? 1916 (next_to_clean - next_to_use - 1) : 1917 (tpd_ring->count + next_to_clean - next_to_use - 1); 1918 } 1919 1920 /* 1921 * get next usable tpd 1922 * Note: should call atl1c_tdp_avail to make sure 1923 * there is enough tpd to use 1924 */ 1925 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1926 enum atl1c_trans_queue type) 1927 { 1928 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1929 struct atl1c_tpd_desc *tpd_desc; 1930 u16 next_to_use = 0; 1931 1932 next_to_use = tpd_ring->next_to_use; 1933 if (++tpd_ring->next_to_use == tpd_ring->count) 1934 tpd_ring->next_to_use = 0; 1935 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1936 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1937 return tpd_desc; 1938 } 1939 1940 static struct atl1c_buffer * 1941 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1942 { 1943 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1944 1945 return &tpd_ring->buffer_info[tpd - 1946 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1947 } 1948 1949 /* Calculate the transmit packet descript needed*/ 1950 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1951 { 1952 u16 tpd_req; 1953 u16 proto_hdr_len = 0; 1954 1955 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1956 1957 if (skb_is_gso(skb)) { 1958 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1959 if (proto_hdr_len < skb_headlen(skb)) 1960 tpd_req++; 1961 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1962 tpd_req++; 1963 } 1964 return tpd_req; 1965 } 1966 1967 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1968 struct sk_buff *skb, 1969 struct atl1c_tpd_desc **tpd, 1970 enum atl1c_trans_queue type) 1971 { 1972 struct pci_dev *pdev = adapter->pdev; 1973 unsigned short offload_type; 1974 u8 hdr_len; 1975 u32 real_len; 1976 1977 if (skb_is_gso(skb)) { 1978 int err; 1979 1980 err = skb_cow_head(skb, 0); 1981 if (err < 0) 1982 return err; 1983 1984 offload_type = skb_shinfo(skb)->gso_type; 1985 1986 if (offload_type & SKB_GSO_TCPV4) { 1987 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1988 + ntohs(ip_hdr(skb)->tot_len)); 1989 1990 if (real_len < skb->len) 1991 pskb_trim(skb, real_len); 1992 1993 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1994 if (unlikely(skb->len == hdr_len)) { 1995 /* only xsum need */ 1996 if (netif_msg_tx_queued(adapter)) 1997 dev_warn(&pdev->dev, 1998 "IPV4 tso with zero data??\n"); 1999 goto check_sum; 2000 } else { 2001 ip_hdr(skb)->check = 0; 2002 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2003 ip_hdr(skb)->saddr, 2004 ip_hdr(skb)->daddr, 2005 0, IPPROTO_TCP, 0); 2006 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2007 } 2008 } 2009 2010 if (offload_type & SKB_GSO_TCPV6) { 2011 struct atl1c_tpd_ext_desc *etpd = 2012 *(struct atl1c_tpd_ext_desc **)(tpd); 2013 2014 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2015 *tpd = atl1c_get_tpd(adapter, type); 2016 ipv6_hdr(skb)->payload_len = 0; 2017 /* check payload == 0 byte ? */ 2018 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2019 if (unlikely(skb->len == hdr_len)) { 2020 /* only xsum need */ 2021 if (netif_msg_tx_queued(adapter)) 2022 dev_warn(&pdev->dev, 2023 "IPV6 tso with zero data??\n"); 2024 goto check_sum; 2025 } else 2026 tcp_v6_gso_csum_prep(skb); 2027 2028 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2029 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2030 etpd->pkt_len = cpu_to_le32(skb->len); 2031 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2032 } 2033 2034 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2035 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2036 TPD_TCPHDR_OFFSET_SHIFT; 2037 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2038 TPD_MSS_SHIFT; 2039 return 0; 2040 } 2041 2042 check_sum: 2043 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2044 u8 css, cso; 2045 cso = skb_checksum_start_offset(skb); 2046 2047 if (unlikely(cso & 0x1)) { 2048 if (netif_msg_tx_err(adapter)) 2049 dev_err(&adapter->pdev->dev, 2050 "payload offset should not an event number\n"); 2051 return -1; 2052 } else { 2053 css = cso + skb->csum_offset; 2054 2055 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2056 TPD_PLOADOFFSET_SHIFT; 2057 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2058 TPD_CCSUM_OFFSET_SHIFT; 2059 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2060 } 2061 } 2062 return 0; 2063 } 2064 2065 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2066 struct atl1c_tpd_desc *first_tpd, 2067 enum atl1c_trans_queue type) 2068 { 2069 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2070 struct atl1c_buffer *buffer_info; 2071 struct atl1c_tpd_desc *tpd; 2072 u16 first_index, index; 2073 2074 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2075 index = first_index; 2076 while (index != tpd_ring->next_to_use) { 2077 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2078 buffer_info = &tpd_ring->buffer_info[index]; 2079 atl1c_clean_buffer(adpt->pdev, buffer_info); 2080 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2081 if (++index == tpd_ring->count) 2082 index = 0; 2083 } 2084 tpd_ring->next_to_use = first_index; 2085 } 2086 2087 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2088 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2089 enum atl1c_trans_queue type) 2090 { 2091 struct atl1c_tpd_desc *use_tpd = NULL; 2092 struct atl1c_buffer *buffer_info = NULL; 2093 u16 buf_len = skb_headlen(skb); 2094 u16 map_len = 0; 2095 u16 mapped_len = 0; 2096 u16 hdr_len = 0; 2097 u16 nr_frags; 2098 u16 f; 2099 int tso; 2100 2101 nr_frags = skb_shinfo(skb)->nr_frags; 2102 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2103 if (tso) { 2104 /* TSO */ 2105 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2106 use_tpd = tpd; 2107 2108 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2109 buffer_info->length = map_len; 2110 buffer_info->dma = dma_map_single(&adapter->pdev->dev, 2111 skb->data, hdr_len, 2112 DMA_TO_DEVICE); 2113 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2114 goto err_dma; 2115 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2116 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2117 ATL1C_PCIMAP_TODEVICE); 2118 mapped_len += map_len; 2119 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2120 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2121 } 2122 2123 if (mapped_len < buf_len) { 2124 /* mapped_len == 0, means we should use the first tpd, 2125 which is given by caller */ 2126 if (mapped_len == 0) 2127 use_tpd = tpd; 2128 else { 2129 use_tpd = atl1c_get_tpd(adapter, type); 2130 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2131 } 2132 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2133 buffer_info->length = buf_len - mapped_len; 2134 buffer_info->dma = 2135 dma_map_single(&adapter->pdev->dev, 2136 skb->data + mapped_len, 2137 buffer_info->length, DMA_TO_DEVICE); 2138 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2139 goto err_dma; 2140 2141 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2142 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2143 ATL1C_PCIMAP_TODEVICE); 2144 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2145 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2146 } 2147 2148 for (f = 0; f < nr_frags; f++) { 2149 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2150 2151 use_tpd = atl1c_get_tpd(adapter, type); 2152 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2153 2154 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2155 buffer_info->length = skb_frag_size(frag); 2156 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2157 frag, 0, 2158 buffer_info->length, 2159 DMA_TO_DEVICE); 2160 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2161 goto err_dma; 2162 2163 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2164 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2165 ATL1C_PCIMAP_TODEVICE); 2166 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2167 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2168 } 2169 2170 /* The last tpd */ 2171 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2172 /* The last buffer info contain the skb address, 2173 so it will be free after unmap */ 2174 buffer_info->skb = skb; 2175 2176 return 0; 2177 2178 err_dma: 2179 buffer_info->dma = 0; 2180 buffer_info->length = 0; 2181 return -1; 2182 } 2183 2184 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2185 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2186 { 2187 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2188 u16 reg; 2189 2190 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2191 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2192 } 2193 2194 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2195 struct net_device *netdev) 2196 { 2197 struct atl1c_adapter *adapter = netdev_priv(netdev); 2198 u16 tpd_req; 2199 struct atl1c_tpd_desc *tpd; 2200 enum atl1c_trans_queue type = atl1c_trans_normal; 2201 2202 if (test_bit(__AT_DOWN, &adapter->flags)) { 2203 dev_kfree_skb_any(skb); 2204 return NETDEV_TX_OK; 2205 } 2206 2207 tpd_req = atl1c_cal_tpd_req(skb); 2208 2209 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2210 /* no enough descriptor, just stop queue */ 2211 netif_stop_queue(netdev); 2212 return NETDEV_TX_BUSY; 2213 } 2214 2215 tpd = atl1c_get_tpd(adapter, type); 2216 2217 /* do TSO and check sum */ 2218 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2219 dev_kfree_skb_any(skb); 2220 return NETDEV_TX_OK; 2221 } 2222 2223 if (unlikely(skb_vlan_tag_present(skb))) { 2224 u16 vlan = skb_vlan_tag_get(skb); 2225 __le16 tag; 2226 2227 vlan = cpu_to_le16(vlan); 2228 AT_VLAN_TO_TAG(vlan, tag); 2229 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2230 tpd->vlan_tag = tag; 2231 } 2232 2233 if (skb_network_offset(skb) != ETH_HLEN) 2234 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2235 2236 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2237 netif_info(adapter, tx_done, adapter->netdev, 2238 "tx-skb dropped due to dma error\n"); 2239 /* roll back tpd/buffer */ 2240 atl1c_tx_rollback(adapter, tpd, type); 2241 dev_kfree_skb_any(skb); 2242 } else { 2243 netdev_sent_queue(adapter->netdev, skb->len); 2244 atl1c_tx_queue(adapter, skb, tpd, type); 2245 } 2246 2247 return NETDEV_TX_OK; 2248 } 2249 2250 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2251 { 2252 struct net_device *netdev = adapter->netdev; 2253 2254 free_irq(adapter->pdev->irq, netdev); 2255 2256 if (adapter->have_msi) 2257 pci_disable_msi(adapter->pdev); 2258 } 2259 2260 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2261 { 2262 struct pci_dev *pdev = adapter->pdev; 2263 struct net_device *netdev = adapter->netdev; 2264 int flags = 0; 2265 int err = 0; 2266 2267 adapter->have_msi = true; 2268 err = pci_enable_msi(adapter->pdev); 2269 if (err) { 2270 if (netif_msg_ifup(adapter)) 2271 dev_err(&pdev->dev, 2272 "Unable to allocate MSI interrupt Error: %d\n", 2273 err); 2274 adapter->have_msi = false; 2275 } 2276 2277 if (!adapter->have_msi) 2278 flags |= IRQF_SHARED; 2279 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2280 netdev->name, netdev); 2281 if (err) { 2282 if (netif_msg_ifup(adapter)) 2283 dev_err(&pdev->dev, 2284 "Unable to allocate interrupt Error: %d\n", 2285 err); 2286 if (adapter->have_msi) 2287 pci_disable_msi(adapter->pdev); 2288 return err; 2289 } 2290 if (netif_msg_ifup(adapter)) 2291 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2292 return err; 2293 } 2294 2295 2296 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2297 { 2298 /* release tx-pending skbs and reset tx/rx ring index */ 2299 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2300 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2301 atl1c_clean_rx_ring(adapter); 2302 } 2303 2304 static int atl1c_up(struct atl1c_adapter *adapter) 2305 { 2306 struct net_device *netdev = adapter->netdev; 2307 int err; 2308 2309 netif_carrier_off(netdev); 2310 2311 err = atl1c_configure(adapter); 2312 if (unlikely(err)) 2313 goto err_up; 2314 2315 err = atl1c_request_irq(adapter); 2316 if (unlikely(err)) 2317 goto err_up; 2318 2319 atl1c_check_link_status(adapter); 2320 clear_bit(__AT_DOWN, &adapter->flags); 2321 napi_enable(&adapter->napi); 2322 atl1c_irq_enable(adapter); 2323 netif_start_queue(netdev); 2324 return err; 2325 2326 err_up: 2327 atl1c_clean_rx_ring(adapter); 2328 return err; 2329 } 2330 2331 static void atl1c_down(struct atl1c_adapter *adapter) 2332 { 2333 struct net_device *netdev = adapter->netdev; 2334 2335 atl1c_del_timer(adapter); 2336 adapter->work_event = 0; /* clear all event */ 2337 /* signal that we're down so the interrupt handler does not 2338 * reschedule our watchdog timer */ 2339 set_bit(__AT_DOWN, &adapter->flags); 2340 netif_carrier_off(netdev); 2341 napi_disable(&adapter->napi); 2342 atl1c_irq_disable(adapter); 2343 atl1c_free_irq(adapter); 2344 /* disable ASPM if device inactive */ 2345 atl1c_disable_l0s_l1(&adapter->hw); 2346 /* reset MAC to disable all RX/TX */ 2347 atl1c_reset_mac(&adapter->hw); 2348 msleep(1); 2349 2350 adapter->link_speed = SPEED_0; 2351 adapter->link_duplex = -1; 2352 atl1c_reset_dma_ring(adapter); 2353 } 2354 2355 /** 2356 * atl1c_open - Called when a network interface is made active 2357 * @netdev: network interface device structure 2358 * 2359 * Returns 0 on success, negative value on failure 2360 * 2361 * The open entry point is called when a network interface is made 2362 * active by the system (IFF_UP). At this point all resources needed 2363 * for transmit and receive operations are allocated, the interrupt 2364 * handler is registered with the OS, the watchdog timer is started, 2365 * and the stack is notified that the interface is ready. 2366 */ 2367 static int atl1c_open(struct net_device *netdev) 2368 { 2369 struct atl1c_adapter *adapter = netdev_priv(netdev); 2370 int err; 2371 2372 /* disallow open during test */ 2373 if (test_bit(__AT_TESTING, &adapter->flags)) 2374 return -EBUSY; 2375 2376 /* allocate rx/tx dma buffer & descriptors */ 2377 err = atl1c_setup_ring_resources(adapter); 2378 if (unlikely(err)) 2379 return err; 2380 2381 err = atl1c_up(adapter); 2382 if (unlikely(err)) 2383 goto err_up; 2384 2385 return 0; 2386 2387 err_up: 2388 atl1c_free_irq(adapter); 2389 atl1c_free_ring_resources(adapter); 2390 atl1c_reset_mac(&adapter->hw); 2391 return err; 2392 } 2393 2394 /** 2395 * atl1c_close - Disables a network interface 2396 * @netdev: network interface device structure 2397 * 2398 * Returns 0, this is not allowed to fail 2399 * 2400 * The close entry point is called when an interface is de-activated 2401 * by the OS. The hardware is still under the drivers control, but 2402 * needs to be disabled. A global MAC reset is issued to stop the 2403 * hardware, and all transmit and receive resources are freed. 2404 */ 2405 static int atl1c_close(struct net_device *netdev) 2406 { 2407 struct atl1c_adapter *adapter = netdev_priv(netdev); 2408 2409 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2410 set_bit(__AT_DOWN, &adapter->flags); 2411 cancel_work_sync(&adapter->common_task); 2412 atl1c_down(adapter); 2413 atl1c_free_ring_resources(adapter); 2414 return 0; 2415 } 2416 2417 static int atl1c_suspend(struct device *dev) 2418 { 2419 struct net_device *netdev = dev_get_drvdata(dev); 2420 struct atl1c_adapter *adapter = netdev_priv(netdev); 2421 struct atl1c_hw *hw = &adapter->hw; 2422 u32 wufc = adapter->wol; 2423 2424 atl1c_disable_l0s_l1(hw); 2425 if (netif_running(netdev)) { 2426 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2427 atl1c_down(adapter); 2428 } 2429 netif_device_detach(netdev); 2430 2431 if (wufc) 2432 if (atl1c_phy_to_ps_link(hw) != 0) 2433 dev_dbg(dev, "phy power saving failed"); 2434 2435 atl1c_power_saving(hw, wufc); 2436 2437 return 0; 2438 } 2439 2440 #ifdef CONFIG_PM_SLEEP 2441 static int atl1c_resume(struct device *dev) 2442 { 2443 struct net_device *netdev = dev_get_drvdata(dev); 2444 struct atl1c_adapter *adapter = netdev_priv(netdev); 2445 2446 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2447 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2448 2449 atl1c_phy_reset(&adapter->hw); 2450 atl1c_reset_mac(&adapter->hw); 2451 atl1c_phy_init(&adapter->hw); 2452 2453 netif_device_attach(netdev); 2454 if (netif_running(netdev)) 2455 atl1c_up(adapter); 2456 2457 return 0; 2458 } 2459 #endif 2460 2461 static void atl1c_shutdown(struct pci_dev *pdev) 2462 { 2463 struct net_device *netdev = pci_get_drvdata(pdev); 2464 struct atl1c_adapter *adapter = netdev_priv(netdev); 2465 2466 atl1c_suspend(&pdev->dev); 2467 pci_wake_from_d3(pdev, adapter->wol); 2468 pci_set_power_state(pdev, PCI_D3hot); 2469 } 2470 2471 static const struct net_device_ops atl1c_netdev_ops = { 2472 .ndo_open = atl1c_open, 2473 .ndo_stop = atl1c_close, 2474 .ndo_validate_addr = eth_validate_addr, 2475 .ndo_start_xmit = atl1c_xmit_frame, 2476 .ndo_set_mac_address = atl1c_set_mac_addr, 2477 .ndo_set_rx_mode = atl1c_set_multi, 2478 .ndo_change_mtu = atl1c_change_mtu, 2479 .ndo_fix_features = atl1c_fix_features, 2480 .ndo_set_features = atl1c_set_features, 2481 .ndo_do_ioctl = atl1c_ioctl, 2482 .ndo_tx_timeout = atl1c_tx_timeout, 2483 .ndo_get_stats = atl1c_get_stats, 2484 #ifdef CONFIG_NET_POLL_CONTROLLER 2485 .ndo_poll_controller = atl1c_netpoll, 2486 #endif 2487 }; 2488 2489 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2490 { 2491 SET_NETDEV_DEV(netdev, &pdev->dev); 2492 pci_set_drvdata(pdev, netdev); 2493 2494 netdev->netdev_ops = &atl1c_netdev_ops; 2495 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2496 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 2497 atl1c_set_ethtool_ops(netdev); 2498 2499 /* TODO: add when ready */ 2500 netdev->hw_features = NETIF_F_SG | 2501 NETIF_F_HW_CSUM | 2502 NETIF_F_HW_VLAN_CTAG_RX | 2503 NETIF_F_TSO | 2504 NETIF_F_TSO6; 2505 netdev->features = netdev->hw_features | 2506 NETIF_F_HW_VLAN_CTAG_TX; 2507 return 0; 2508 } 2509 2510 /** 2511 * atl1c_probe - Device Initialization Routine 2512 * @pdev: PCI device information struct 2513 * @ent: entry in atl1c_pci_tbl 2514 * 2515 * Returns 0 on success, negative on failure 2516 * 2517 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2518 * The OS initialization, configuring of the adapter private structure, 2519 * and a hardware reset occur. 2520 */ 2521 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2522 { 2523 struct net_device *netdev; 2524 struct atl1c_adapter *adapter; 2525 static int cards_found; 2526 2527 int err = 0; 2528 2529 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2530 err = pci_enable_device_mem(pdev); 2531 if (err) { 2532 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2533 return err; 2534 } 2535 2536 /* 2537 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2538 * shared register for the high 32 bits, so only a single, aligned, 2539 * 4 GB physical address range can be used at a time. 2540 * 2541 * Supporting 64-bit DMA on this hardware is more trouble than it's 2542 * worth. It is far easier to limit to 32-bit DMA than update 2543 * various kernel subsystems to support the mechanics required by a 2544 * fixed-high-32-bit system. 2545 */ 2546 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2547 if (err) { 2548 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2549 goto err_dma; 2550 } 2551 2552 err = pci_request_regions(pdev, atl1c_driver_name); 2553 if (err) { 2554 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2555 goto err_pci_reg; 2556 } 2557 2558 pci_set_master(pdev); 2559 2560 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2561 if (netdev == NULL) { 2562 err = -ENOMEM; 2563 goto err_alloc_etherdev; 2564 } 2565 2566 err = atl1c_init_netdev(netdev, pdev); 2567 if (err) { 2568 dev_err(&pdev->dev, "init netdevice failed\n"); 2569 goto err_init_netdev; 2570 } 2571 adapter = netdev_priv(netdev); 2572 adapter->bd_number = cards_found; 2573 adapter->netdev = netdev; 2574 adapter->pdev = pdev; 2575 adapter->hw.adapter = adapter; 2576 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2577 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2578 if (!adapter->hw.hw_addr) { 2579 err = -EIO; 2580 dev_err(&pdev->dev, "cannot map device registers\n"); 2581 goto err_ioremap; 2582 } 2583 2584 /* init mii data */ 2585 adapter->mii.dev = netdev; 2586 adapter->mii.mdio_read = atl1c_mdio_read; 2587 adapter->mii.mdio_write = atl1c_mdio_write; 2588 adapter->mii.phy_id_mask = 0x1f; 2589 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2590 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2591 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2592 /* setup the private structure */ 2593 err = atl1c_sw_init(adapter); 2594 if (err) { 2595 dev_err(&pdev->dev, "net device private data init failed\n"); 2596 goto err_sw_init; 2597 } 2598 /* set max MTU */ 2599 atl1c_set_max_mtu(netdev); 2600 2601 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2602 2603 /* Init GPHY as early as possible due to power saving issue */ 2604 atl1c_phy_reset(&adapter->hw); 2605 2606 err = atl1c_reset_mac(&adapter->hw); 2607 if (err) { 2608 err = -EIO; 2609 goto err_reset; 2610 } 2611 2612 /* reset the controller to 2613 * put the device in a known good starting state */ 2614 err = atl1c_phy_init(&adapter->hw); 2615 if (err) { 2616 err = -EIO; 2617 goto err_reset; 2618 } 2619 if (atl1c_read_mac_addr(&adapter->hw)) { 2620 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2621 netdev->addr_assign_type = NET_ADDR_RANDOM; 2622 } 2623 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2624 if (netif_msg_probe(adapter)) 2625 dev_dbg(&pdev->dev, "mac address : %pM\n", 2626 adapter->hw.mac_addr); 2627 2628 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2629 INIT_WORK(&adapter->common_task, atl1c_common_task); 2630 adapter->work_event = 0; 2631 err = register_netdev(netdev); 2632 if (err) { 2633 dev_err(&pdev->dev, "register netdevice failed\n"); 2634 goto err_register; 2635 } 2636 2637 cards_found++; 2638 return 0; 2639 2640 err_reset: 2641 err_register: 2642 err_sw_init: 2643 iounmap(adapter->hw.hw_addr); 2644 err_init_netdev: 2645 err_ioremap: 2646 free_netdev(netdev); 2647 err_alloc_etherdev: 2648 pci_release_regions(pdev); 2649 err_pci_reg: 2650 err_dma: 2651 pci_disable_device(pdev); 2652 return err; 2653 } 2654 2655 /** 2656 * atl1c_remove - Device Removal Routine 2657 * @pdev: PCI device information struct 2658 * 2659 * atl1c_remove is called by the PCI subsystem to alert the driver 2660 * that it should release a PCI device. The could be caused by a 2661 * Hot-Plug event, or because the driver is going to be removed from 2662 * memory. 2663 */ 2664 static void atl1c_remove(struct pci_dev *pdev) 2665 { 2666 struct net_device *netdev = pci_get_drvdata(pdev); 2667 struct atl1c_adapter *adapter = netdev_priv(netdev); 2668 2669 unregister_netdev(netdev); 2670 /* restore permanent address */ 2671 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2672 atl1c_phy_disable(&adapter->hw); 2673 2674 iounmap(adapter->hw.hw_addr); 2675 2676 pci_release_regions(pdev); 2677 pci_disable_device(pdev); 2678 free_netdev(netdev); 2679 } 2680 2681 /** 2682 * atl1c_io_error_detected - called when PCI error is detected 2683 * @pdev: Pointer to PCI device 2684 * @state: The current pci connection state 2685 * 2686 * This function is called after a PCI bus error affecting 2687 * this device has been detected. 2688 */ 2689 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2690 pci_channel_state_t state) 2691 { 2692 struct net_device *netdev = pci_get_drvdata(pdev); 2693 struct atl1c_adapter *adapter = netdev_priv(netdev); 2694 2695 netif_device_detach(netdev); 2696 2697 if (state == pci_channel_io_perm_failure) 2698 return PCI_ERS_RESULT_DISCONNECT; 2699 2700 if (netif_running(netdev)) 2701 atl1c_down(adapter); 2702 2703 pci_disable_device(pdev); 2704 2705 /* Request a slot slot reset. */ 2706 return PCI_ERS_RESULT_NEED_RESET; 2707 } 2708 2709 /** 2710 * atl1c_io_slot_reset - called after the pci bus has been reset. 2711 * @pdev: Pointer to PCI device 2712 * 2713 * Restart the card from scratch, as if from a cold-boot. Implementation 2714 * resembles the first-half of the e1000_resume routine. 2715 */ 2716 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2717 { 2718 struct net_device *netdev = pci_get_drvdata(pdev); 2719 struct atl1c_adapter *adapter = netdev_priv(netdev); 2720 2721 if (pci_enable_device(pdev)) { 2722 if (netif_msg_hw(adapter)) 2723 dev_err(&pdev->dev, 2724 "Cannot re-enable PCI device after reset\n"); 2725 return PCI_ERS_RESULT_DISCONNECT; 2726 } 2727 pci_set_master(pdev); 2728 2729 pci_enable_wake(pdev, PCI_D3hot, 0); 2730 pci_enable_wake(pdev, PCI_D3cold, 0); 2731 2732 atl1c_reset_mac(&adapter->hw); 2733 2734 return PCI_ERS_RESULT_RECOVERED; 2735 } 2736 2737 /** 2738 * atl1c_io_resume - called when traffic can start flowing again. 2739 * @pdev: Pointer to PCI device 2740 * 2741 * This callback is called when the error recovery driver tells us that 2742 * its OK to resume normal operation. Implementation resembles the 2743 * second-half of the atl1c_resume routine. 2744 */ 2745 static void atl1c_io_resume(struct pci_dev *pdev) 2746 { 2747 struct net_device *netdev = pci_get_drvdata(pdev); 2748 struct atl1c_adapter *adapter = netdev_priv(netdev); 2749 2750 if (netif_running(netdev)) { 2751 if (atl1c_up(adapter)) { 2752 if (netif_msg_hw(adapter)) 2753 dev_err(&pdev->dev, 2754 "Cannot bring device back up after reset\n"); 2755 return; 2756 } 2757 } 2758 2759 netif_device_attach(netdev); 2760 } 2761 2762 static const struct pci_error_handlers atl1c_err_handler = { 2763 .error_detected = atl1c_io_error_detected, 2764 .slot_reset = atl1c_io_slot_reset, 2765 .resume = atl1c_io_resume, 2766 }; 2767 2768 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2769 2770 static struct pci_driver atl1c_driver = { 2771 .name = atl1c_driver_name, 2772 .id_table = atl1c_pci_tbl, 2773 .probe = atl1c_probe, 2774 .remove = atl1c_remove, 2775 .shutdown = atl1c_shutdown, 2776 .err_handler = &atl1c_err_handler, 2777 .driver.pm = &atl1c_pm_ops, 2778 }; 2779 2780 module_pci_driver(atl1c_driver); 2781