1 /* 2 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved. 3 * 4 * Derived from Intel e1000 driver 5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 59 19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 */ 21 22 #include "atl1c.h" 23 24 #define ATL1C_DRV_VERSION "1.0.1.1-NAPI" 25 char atl1c_driver_name[] = "atl1c"; 26 char atl1c_driver_version[] = ATL1C_DRV_VERSION; 27 28 /* 29 * atl1c_pci_tbl - PCI Device ID Table 30 * 31 * Wildcard entries (PCI_ANY_ID) should come last 32 * Last entry must be all 0s 33 * 34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 35 * Class, Class Mask, private data (not used) } 36 */ 37 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = { 38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)}, 39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)}, 40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)}, 41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)}, 42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)}, 43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)}, 44 /* required last entry */ 45 { 0 } 46 }; 47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl); 48 49 MODULE_AUTHOR("Jie Yang"); 50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>"); 51 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver"); 52 MODULE_LICENSE("GPL"); 53 MODULE_VERSION(ATL1C_DRV_VERSION); 54 55 static int atl1c_stop_mac(struct atl1c_hw *hw); 56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw); 57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed); 58 static void atl1c_start_mac(struct atl1c_adapter *adapter); 59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 60 int *work_done, int work_to_do); 61 static int atl1c_up(struct atl1c_adapter *adapter); 62 static void atl1c_down(struct atl1c_adapter *adapter); 63 static int atl1c_reset_mac(struct atl1c_hw *hw); 64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); 65 static int atl1c_configure(struct atl1c_adapter *adapter); 66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter); 67 68 static const u16 atl1c_pay_load_size[] = { 69 128, 256, 512, 1024, 2048, 4096, 70 }; 71 72 73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | 74 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP; 75 static void atl1c_pcie_patch(struct atl1c_hw *hw) 76 { 77 u32 mst_data, data; 78 79 /* pclk sel could switch to 25M */ 80 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data); 81 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS; 82 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data); 83 84 /* WoL/PCIE related settings */ 85 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) { 86 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data); 87 data |= PCIE_PHYMISC_FORCE_RCV_DET; 88 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data); 89 } else { /* new dev set bit5 of MASTER */ 90 if (!(mst_data & MASTER_CTRL_WAKEN_25M)) 91 AT_WRITE_REG(hw, REG_MASTER_CTRL, 92 mst_data | MASTER_CTRL_WAKEN_25M); 93 } 94 /* aspm/PCIE setting only for l2cb 1.0 */ 95 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) { 96 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data); 97 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW, 98 L2CB1_PCIE_PHYMISC2_CDR_BW); 99 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH, 100 L2CB1_PCIE_PHYMISC2_L0S_TH); 101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data); 102 /* extend L1 sync timer */ 103 AT_READ_REG(hw, REG_LINK_CTRL, &data); 104 data |= LINK_CTRL_EXT_SYNC; 105 AT_WRITE_REG(hw, REG_LINK_CTRL, data); 106 } 107 /* l2cb 1.x & l1d 1.x */ 108 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) { 109 AT_READ_REG(hw, REG_PM_CTRL, &data); 110 data |= PM_CTRL_L0S_BUFSRX_EN; 111 AT_WRITE_REG(hw, REG_PM_CTRL, data); 112 /* clear vendor msg */ 113 AT_READ_REG(hw, REG_DMA_DBG, &data); 114 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG); 115 } 116 } 117 118 /* FIXME: no need any more ? */ 119 /* 120 * atl1c_init_pcie - init PCIE module 121 */ 122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) 123 { 124 u32 data; 125 u32 pci_cmd; 126 struct pci_dev *pdev = hw->adapter->pdev; 127 int pos; 128 129 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd); 130 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 131 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 132 PCI_COMMAND_IO); 133 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd); 134 135 /* 136 * Clear any PowerSaveing Settings 137 */ 138 pci_enable_wake(pdev, PCI_D3hot, 0); 139 pci_enable_wake(pdev, PCI_D3cold, 0); 140 /* wol sts read-clear */ 141 AT_READ_REG(hw, REG_WOL_CTRL, &data); 142 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 143 144 /* 145 * Mask some pcie error bits 146 */ 147 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 148 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); 149 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); 150 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); 151 /* clear error status */ 152 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, 153 PCI_EXP_DEVSTA_NFED | 154 PCI_EXP_DEVSTA_FED | 155 PCI_EXP_DEVSTA_CED | 156 PCI_EXP_DEVSTA_URD); 157 158 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data); 159 data &= ~LTSSM_ID_EN_WRO; 160 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data); 161 162 atl1c_pcie_patch(hw); 163 if (flag & ATL1C_PCIE_L0S_L1_DISABLE) 164 atl1c_disable_l0s_l1(hw); 165 166 msleep(5); 167 } 168 169 /** 170 * atl1c_irq_enable - Enable default interrupt generation settings 171 * @adapter: board private structure 172 */ 173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter) 174 { 175 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 176 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF); 177 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 178 AT_WRITE_FLUSH(&adapter->hw); 179 } 180 } 181 182 /** 183 * atl1c_irq_disable - Mask off interrupt generation on the NIC 184 * @adapter: board private structure 185 */ 186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter) 187 { 188 atomic_inc(&adapter->irq_sem); 189 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 190 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT); 191 AT_WRITE_FLUSH(&adapter->hw); 192 synchronize_irq(adapter->pdev->irq); 193 } 194 195 /** 196 * atl1c_irq_reset - reset interrupt confiure on the NIC 197 * @adapter: board private structure 198 */ 199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter) 200 { 201 atomic_set(&adapter->irq_sem, 1); 202 atl1c_irq_enable(adapter); 203 } 204 205 /* 206 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 207 * of the idle status register until the device is actually idle 208 */ 209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 210 { 211 int timeout; 212 u32 data; 213 214 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 215 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 216 if ((data & modu_ctrl) == 0) 217 return 0; 218 msleep(1); 219 } 220 return data; 221 } 222 223 /** 224 * atl1c_phy_config - Timer Call-back 225 * @data: pointer to netdev cast into an unsigned long 226 */ 227 static void atl1c_phy_config(unsigned long data) 228 { 229 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data; 230 struct atl1c_hw *hw = &adapter->hw; 231 unsigned long flags; 232 233 spin_lock_irqsave(&adapter->mdio_lock, flags); 234 atl1c_restart_autoneg(hw); 235 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 236 } 237 238 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 239 { 240 WARN_ON(in_interrupt()); 241 atl1c_down(adapter); 242 atl1c_up(adapter); 243 clear_bit(__AT_RESETTING, &adapter->flags); 244 } 245 246 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 247 { 248 struct atl1c_hw *hw = &adapter->hw; 249 struct net_device *netdev = adapter->netdev; 250 struct pci_dev *pdev = adapter->pdev; 251 int err; 252 unsigned long flags; 253 u16 speed, duplex, phy_data; 254 255 spin_lock_irqsave(&adapter->mdio_lock, flags); 256 /* MII_BMSR must read twise */ 257 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 258 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data); 259 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 260 261 if ((phy_data & BMSR_LSTATUS) == 0) { 262 /* link down */ 263 netif_carrier_off(netdev); 264 hw->hibernate = true; 265 if (atl1c_reset_mac(hw) != 0) 266 if (netif_msg_hw(adapter)) 267 dev_warn(&pdev->dev, "reset mac failed\n"); 268 atl1c_set_aspm(hw, SPEED_0); 269 atl1c_post_phy_linkchg(hw, SPEED_0); 270 atl1c_reset_dma_ring(adapter); 271 atl1c_configure(adapter); 272 } else { 273 /* Link Up */ 274 hw->hibernate = false; 275 spin_lock_irqsave(&adapter->mdio_lock, flags); 276 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 277 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 278 if (unlikely(err)) 279 return; 280 /* link result is our setting */ 281 if (adapter->link_speed != speed || 282 adapter->link_duplex != duplex) { 283 adapter->link_speed = speed; 284 adapter->link_duplex = duplex; 285 atl1c_set_aspm(hw, speed); 286 atl1c_post_phy_linkchg(hw, speed); 287 atl1c_start_mac(adapter); 288 if (netif_msg_link(adapter)) 289 dev_info(&pdev->dev, 290 "%s: %s NIC Link is Up<%d Mbps %s>\n", 291 atl1c_driver_name, netdev->name, 292 adapter->link_speed, 293 adapter->link_duplex == FULL_DUPLEX ? 294 "Full Duplex" : "Half Duplex"); 295 } 296 if (!netif_carrier_ok(netdev)) 297 netif_carrier_on(netdev); 298 } 299 } 300 301 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 302 { 303 struct net_device *netdev = adapter->netdev; 304 struct pci_dev *pdev = adapter->pdev; 305 u16 phy_data; 306 u16 link_up; 307 308 spin_lock(&adapter->mdio_lock); 309 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 310 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); 311 spin_unlock(&adapter->mdio_lock); 312 link_up = phy_data & BMSR_LSTATUS; 313 /* notify upper layer link down ASAP */ 314 if (!link_up) { 315 if (netif_carrier_ok(netdev)) { 316 /* old link state: Up */ 317 netif_carrier_off(netdev); 318 if (netif_msg_link(adapter)) 319 dev_info(&pdev->dev, 320 "%s: %s NIC Link is Down\n", 321 atl1c_driver_name, netdev->name); 322 adapter->link_speed = SPEED_0; 323 } 324 } 325 326 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 327 schedule_work(&adapter->common_task); 328 } 329 330 static void atl1c_common_task(struct work_struct *work) 331 { 332 struct atl1c_adapter *adapter; 333 struct net_device *netdev; 334 335 adapter = container_of(work, struct atl1c_adapter, common_task); 336 netdev = adapter->netdev; 337 338 if (test_bit(__AT_DOWN, &adapter->flags)) 339 return; 340 341 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 342 netif_device_detach(netdev); 343 atl1c_down(adapter); 344 atl1c_up(adapter); 345 netif_device_attach(netdev); 346 } 347 348 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 349 &adapter->work_event)) { 350 atl1c_irq_disable(adapter); 351 atl1c_check_link_status(adapter); 352 atl1c_irq_enable(adapter); 353 } 354 } 355 356 357 static void atl1c_del_timer(struct atl1c_adapter *adapter) 358 { 359 del_timer_sync(&adapter->phy_config_timer); 360 } 361 362 363 /** 364 * atl1c_tx_timeout - Respond to a Tx Hang 365 * @netdev: network interface device structure 366 */ 367 static void atl1c_tx_timeout(struct net_device *netdev) 368 { 369 struct atl1c_adapter *adapter = netdev_priv(netdev); 370 371 /* Do the reset outside of interrupt context */ 372 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 373 schedule_work(&adapter->common_task); 374 } 375 376 /** 377 * atl1c_set_multi - Multicast and Promiscuous mode set 378 * @netdev: network interface device structure 379 * 380 * The set_multi entry point is called whenever the multicast address 381 * list or the network interface flags are updated. This routine is 382 * responsible for configuring the hardware for proper multicast, 383 * promiscuous mode, and all-multi behavior. 384 */ 385 static void atl1c_set_multi(struct net_device *netdev) 386 { 387 struct atl1c_adapter *adapter = netdev_priv(netdev); 388 struct atl1c_hw *hw = &adapter->hw; 389 struct netdev_hw_addr *ha; 390 u32 mac_ctrl_data; 391 u32 hash_value; 392 393 /* Check for Promiscuous and All Multicast modes */ 394 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 395 396 if (netdev->flags & IFF_PROMISC) { 397 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 398 } else if (netdev->flags & IFF_ALLMULTI) { 399 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 400 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 401 } else { 402 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 403 } 404 405 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 406 407 /* clear the old settings from the multicast hash table */ 408 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 409 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 410 411 /* comoute mc addresses' hash value ,and put it into hash table */ 412 netdev_for_each_mc_addr(ha, netdev) { 413 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 414 atl1c_hash_set(hw, hash_value); 415 } 416 } 417 418 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 419 { 420 if (features & NETIF_F_HW_VLAN_RX) { 421 /* enable VLAN tag insert/strip */ 422 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 423 } else { 424 /* disable VLAN tag insert/strip */ 425 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 426 } 427 } 428 429 static void atl1c_vlan_mode(struct net_device *netdev, 430 netdev_features_t features) 431 { 432 struct atl1c_adapter *adapter = netdev_priv(netdev); 433 struct pci_dev *pdev = adapter->pdev; 434 u32 mac_ctrl_data = 0; 435 436 if (netif_msg_pktdata(adapter)) 437 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 438 439 atl1c_irq_disable(adapter); 440 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 441 __atl1c_vlan_mode(features, &mac_ctrl_data); 442 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 443 atl1c_irq_enable(adapter); 444 } 445 446 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 447 { 448 struct pci_dev *pdev = adapter->pdev; 449 450 if (netif_msg_pktdata(adapter)) 451 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 452 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 453 } 454 455 /** 456 * atl1c_set_mac - Change the Ethernet Address of the NIC 457 * @netdev: network interface device structure 458 * @p: pointer to an address structure 459 * 460 * Returns 0 on success, negative on failure 461 */ 462 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 463 { 464 struct atl1c_adapter *adapter = netdev_priv(netdev); 465 struct sockaddr *addr = p; 466 467 if (!is_valid_ether_addr(addr->sa_data)) 468 return -EADDRNOTAVAIL; 469 470 if (netif_running(netdev)) 471 return -EBUSY; 472 473 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 474 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 475 476 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 477 478 return 0; 479 } 480 481 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 482 struct net_device *dev) 483 { 484 int mtu = dev->mtu; 485 486 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 487 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 488 } 489 490 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 491 netdev_features_t features) 492 { 493 /* 494 * Since there is no support for separate rx/tx vlan accel 495 * enable/disable make sure tx flag is always in same state as rx. 496 */ 497 if (features & NETIF_F_HW_VLAN_RX) 498 features |= NETIF_F_HW_VLAN_TX; 499 else 500 features &= ~NETIF_F_HW_VLAN_TX; 501 502 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 503 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 504 505 return features; 506 } 507 508 static int atl1c_set_features(struct net_device *netdev, 509 netdev_features_t features) 510 { 511 netdev_features_t changed = netdev->features ^ features; 512 513 if (changed & NETIF_F_HW_VLAN_RX) 514 atl1c_vlan_mode(netdev, features); 515 516 return 0; 517 } 518 519 /** 520 * atl1c_change_mtu - Change the Maximum Transfer Unit 521 * @netdev: network interface device structure 522 * @new_mtu: new value for maximum frame size 523 * 524 * Returns 0 on success, negative on failure 525 */ 526 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 527 { 528 struct atl1c_adapter *adapter = netdev_priv(netdev); 529 struct atl1c_hw *hw = &adapter->hw; 530 int old_mtu = netdev->mtu; 531 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 532 533 /* Fast Ethernet controller doesn't support jumbo packet */ 534 if (((hw->nic_type == athr_l2c || 535 hw->nic_type == athr_l2c_b || 536 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) || 537 max_frame < ETH_ZLEN + ETH_FCS_LEN || 538 max_frame > MAX_JUMBO_FRAME_SIZE) { 539 if (netif_msg_link(adapter)) 540 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n"); 541 return -EINVAL; 542 } 543 /* set MTU */ 544 if (old_mtu != new_mtu && netif_running(netdev)) { 545 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 546 msleep(1); 547 netdev->mtu = new_mtu; 548 adapter->hw.max_frame_size = new_mtu; 549 atl1c_set_rxbufsize(adapter, netdev); 550 atl1c_down(adapter); 551 netdev_update_features(netdev); 552 atl1c_up(adapter); 553 clear_bit(__AT_RESETTING, &adapter->flags); 554 } 555 return 0; 556 } 557 558 /* 559 * caller should hold mdio_lock 560 */ 561 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 562 { 563 struct atl1c_adapter *adapter = netdev_priv(netdev); 564 u16 result; 565 566 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 567 return result; 568 } 569 570 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 571 int reg_num, int val) 572 { 573 struct atl1c_adapter *adapter = netdev_priv(netdev); 574 575 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 576 } 577 578 static int atl1c_mii_ioctl(struct net_device *netdev, 579 struct ifreq *ifr, int cmd) 580 { 581 struct atl1c_adapter *adapter = netdev_priv(netdev); 582 struct pci_dev *pdev = adapter->pdev; 583 struct mii_ioctl_data *data = if_mii(ifr); 584 unsigned long flags; 585 int retval = 0; 586 587 if (!netif_running(netdev)) 588 return -EINVAL; 589 590 spin_lock_irqsave(&adapter->mdio_lock, flags); 591 switch (cmd) { 592 case SIOCGMIIPHY: 593 data->phy_id = 0; 594 break; 595 596 case SIOCGMIIREG: 597 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 598 &data->val_out)) { 599 retval = -EIO; 600 goto out; 601 } 602 break; 603 604 case SIOCSMIIREG: 605 if (data->reg_num & ~(0x1F)) { 606 retval = -EFAULT; 607 goto out; 608 } 609 610 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 611 data->reg_num, data->val_in); 612 if (atl1c_write_phy_reg(&adapter->hw, 613 data->reg_num, data->val_in)) { 614 retval = -EIO; 615 goto out; 616 } 617 break; 618 619 default: 620 retval = -EOPNOTSUPP; 621 break; 622 } 623 out: 624 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 625 return retval; 626 } 627 628 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 629 { 630 switch (cmd) { 631 case SIOCGMIIPHY: 632 case SIOCGMIIREG: 633 case SIOCSMIIREG: 634 return atl1c_mii_ioctl(netdev, ifr, cmd); 635 default: 636 return -EOPNOTSUPP; 637 } 638 } 639 640 /** 641 * atl1c_alloc_queues - Allocate memory for all rings 642 * @adapter: board private structure to initialize 643 * 644 */ 645 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 646 { 647 return 0; 648 } 649 650 static void atl1c_set_mac_type(struct atl1c_hw *hw) 651 { 652 switch (hw->device_id) { 653 case PCI_DEVICE_ID_ATTANSIC_L2C: 654 hw->nic_type = athr_l2c; 655 break; 656 case PCI_DEVICE_ID_ATTANSIC_L1C: 657 hw->nic_type = athr_l1c; 658 break; 659 case PCI_DEVICE_ID_ATHEROS_L2C_B: 660 hw->nic_type = athr_l2c_b; 661 break; 662 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 663 hw->nic_type = athr_l2c_b2; 664 break; 665 case PCI_DEVICE_ID_ATHEROS_L1D: 666 hw->nic_type = athr_l1d; 667 break; 668 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 669 hw->nic_type = athr_l1d_2; 670 break; 671 default: 672 break; 673 } 674 } 675 676 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 677 { 678 u32 link_ctrl_data; 679 680 atl1c_set_mac_type(hw); 681 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 682 683 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 684 ATL1C_TXQ_MODE_ENHANCE; 685 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 686 ATL1C_ASPM_L1_SUPPORT; 687 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 688 689 if (hw->nic_type == athr_l1c || 690 hw->nic_type == athr_l1d || 691 hw->nic_type == athr_l1d_2) 692 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 693 return 0; 694 } 695 696 struct atl1c_platform_patch { 697 u16 pci_did; 698 u8 pci_revid; 699 u16 subsystem_vid; 700 u16 subsystem_did; 701 u32 patch_flag; 702 #define ATL1C_LINK_PATCH 0x1 703 }; 704 static const struct atl1c_platform_patch plats[] = { 705 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 706 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 707 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 708 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 709 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 710 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 711 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 712 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 713 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 714 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 715 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 716 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 717 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 718 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 719 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 720 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 721 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 722 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 723 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 724 {0}, 725 }; 726 727 static void atl1c_patch_assign(struct atl1c_hw *hw) 728 { 729 struct pci_dev *pdev = hw->adapter->pdev; 730 u32 misc_ctrl; 731 int i = 0; 732 733 hw->msi_lnkpatch = false; 734 735 while (plats[i].pci_did != 0) { 736 if (plats[i].pci_did == hw->device_id && 737 plats[i].pci_revid == hw->revision_id && 738 plats[i].subsystem_vid == hw->subsystem_vendor_id && 739 plats[i].subsystem_did == hw->subsystem_id) { 740 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 741 hw->msi_lnkpatch = true; 742 } 743 i++; 744 } 745 746 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 747 hw->revision_id == L2CB_V21) { 748 /* config acess mode */ 749 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 750 REG_PCIE_DEV_MISC_CTRL); 751 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 752 misc_ctrl &= ~0x100; 753 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 754 REG_PCIE_DEV_MISC_CTRL); 755 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 756 } 757 } 758 /** 759 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 760 * @adapter: board private structure to initialize 761 * 762 * atl1c_sw_init initializes the Adapter private data structure. 763 * Fields are initialized based on PCI device information and 764 * OS network device settings (MTU size). 765 */ 766 static int atl1c_sw_init(struct atl1c_adapter *adapter) 767 { 768 struct atl1c_hw *hw = &adapter->hw; 769 struct pci_dev *pdev = adapter->pdev; 770 u32 revision; 771 772 773 adapter->wol = 0; 774 device_set_wakeup_enable(&pdev->dev, false); 775 adapter->link_speed = SPEED_0; 776 adapter->link_duplex = FULL_DUPLEX; 777 adapter->tpd_ring[0].count = 1024; 778 adapter->rfd_ring.count = 512; 779 780 hw->vendor_id = pdev->vendor; 781 hw->device_id = pdev->device; 782 hw->subsystem_vendor_id = pdev->subsystem_vendor; 783 hw->subsystem_id = pdev->subsystem_device; 784 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 785 hw->revision_id = revision & 0xFF; 786 /* before link up, we assume hibernate is true */ 787 hw->hibernate = true; 788 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 789 if (atl1c_setup_mac_funcs(hw) != 0) { 790 dev_err(&pdev->dev, "set mac function pointers failed\n"); 791 return -1; 792 } 793 atl1c_patch_assign(hw); 794 795 hw->intr_mask = IMR_NORMAL_MASK; 796 hw->phy_configured = false; 797 hw->preamble_len = 7; 798 hw->max_frame_size = adapter->netdev->mtu; 799 hw->autoneg_advertised = ADVERTISED_Autoneg; 800 hw->indirect_tab = 0xE4E4E4E4; 801 hw->base_cpu = 0; 802 803 hw->ict = 50000; /* 100ms */ 804 hw->smb_timer = 200000; /* 400ms */ 805 hw->rx_imt = 200; 806 hw->tx_imt = 1000; 807 808 hw->tpd_burst = 5; 809 hw->rfd_burst = 8; 810 hw->dma_order = atl1c_dma_ord_out; 811 hw->dmar_block = atl1c_dma_req_1024; 812 813 if (atl1c_alloc_queues(adapter)) { 814 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 815 return -ENOMEM; 816 } 817 /* TODO */ 818 atl1c_set_rxbufsize(adapter, adapter->netdev); 819 atomic_set(&adapter->irq_sem, 1); 820 spin_lock_init(&adapter->mdio_lock); 821 spin_lock_init(&adapter->tx_lock); 822 set_bit(__AT_DOWN, &adapter->flags); 823 824 return 0; 825 } 826 827 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 828 struct atl1c_buffer *buffer_info, int in_irq) 829 { 830 u16 pci_driection; 831 if (buffer_info->flags & ATL1C_BUFFER_FREE) 832 return; 833 if (buffer_info->dma) { 834 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 835 pci_driection = PCI_DMA_FROMDEVICE; 836 else 837 pci_driection = PCI_DMA_TODEVICE; 838 839 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 840 pci_unmap_single(pdev, buffer_info->dma, 841 buffer_info->length, pci_driection); 842 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 843 pci_unmap_page(pdev, buffer_info->dma, 844 buffer_info->length, pci_driection); 845 } 846 if (buffer_info->skb) { 847 if (in_irq) 848 dev_kfree_skb_irq(buffer_info->skb); 849 else 850 dev_kfree_skb(buffer_info->skb); 851 } 852 buffer_info->dma = 0; 853 buffer_info->skb = NULL; 854 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 855 } 856 /** 857 * atl1c_clean_tx_ring - Free Tx-skb 858 * @adapter: board private structure 859 */ 860 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 861 enum atl1c_trans_queue type) 862 { 863 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 864 struct atl1c_buffer *buffer_info; 865 struct pci_dev *pdev = adapter->pdev; 866 u16 index, ring_count; 867 868 ring_count = tpd_ring->count; 869 for (index = 0; index < ring_count; index++) { 870 buffer_info = &tpd_ring->buffer_info[index]; 871 atl1c_clean_buffer(pdev, buffer_info, 0); 872 } 873 874 /* Zero out Tx-buffers */ 875 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 876 ring_count); 877 atomic_set(&tpd_ring->next_to_clean, 0); 878 tpd_ring->next_to_use = 0; 879 } 880 881 /** 882 * atl1c_clean_rx_ring - Free rx-reservation skbs 883 * @adapter: board private structure 884 */ 885 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 886 { 887 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 888 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 889 struct atl1c_buffer *buffer_info; 890 struct pci_dev *pdev = adapter->pdev; 891 int j; 892 893 for (j = 0; j < rfd_ring->count; j++) { 894 buffer_info = &rfd_ring->buffer_info[j]; 895 atl1c_clean_buffer(pdev, buffer_info, 0); 896 } 897 /* zero out the descriptor ring */ 898 memset(rfd_ring->desc, 0, rfd_ring->size); 899 rfd_ring->next_to_clean = 0; 900 rfd_ring->next_to_use = 0; 901 rrd_ring->next_to_use = 0; 902 rrd_ring->next_to_clean = 0; 903 } 904 905 /* 906 * Read / Write Ptr Initialize: 907 */ 908 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 909 { 910 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 911 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 912 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 913 struct atl1c_buffer *buffer_info; 914 int i, j; 915 916 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 917 tpd_ring[i].next_to_use = 0; 918 atomic_set(&tpd_ring[i].next_to_clean, 0); 919 buffer_info = tpd_ring[i].buffer_info; 920 for (j = 0; j < tpd_ring->count; j++) 921 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 922 ATL1C_BUFFER_FREE); 923 } 924 rfd_ring->next_to_use = 0; 925 rfd_ring->next_to_clean = 0; 926 rrd_ring->next_to_use = 0; 927 rrd_ring->next_to_clean = 0; 928 for (j = 0; j < rfd_ring->count; j++) { 929 buffer_info = &rfd_ring->buffer_info[j]; 930 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 931 } 932 } 933 934 /** 935 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 936 * @adapter: board private structure 937 * 938 * Free all transmit software resources 939 */ 940 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 941 { 942 struct pci_dev *pdev = adapter->pdev; 943 944 pci_free_consistent(pdev, adapter->ring_header.size, 945 adapter->ring_header.desc, 946 adapter->ring_header.dma); 947 adapter->ring_header.desc = NULL; 948 949 /* Note: just free tdp_ring.buffer_info, 950 * it contain rfd_ring.buffer_info, do not double free */ 951 if (adapter->tpd_ring[0].buffer_info) { 952 kfree(adapter->tpd_ring[0].buffer_info); 953 adapter->tpd_ring[0].buffer_info = NULL; 954 } 955 } 956 957 /** 958 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources 959 * @adapter: board private structure 960 * 961 * Return 0 on success, negative on failure 962 */ 963 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 964 { 965 struct pci_dev *pdev = adapter->pdev; 966 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 967 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 968 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 969 struct atl1c_ring_header *ring_header = &adapter->ring_header; 970 int size; 971 int i; 972 int count = 0; 973 int rx_desc_count = 0; 974 u32 offset = 0; 975 976 rrd_ring->count = rfd_ring->count; 977 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 978 tpd_ring[i].count = tpd_ring[0].count; 979 980 /* 2 tpd queue, one high priority queue, 981 * another normal priority queue */ 982 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 983 rfd_ring->count); 984 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 985 if (unlikely(!tpd_ring->buffer_info)) 986 goto err_nomem; 987 988 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 989 tpd_ring[i].buffer_info = 990 (tpd_ring->buffer_info + count); 991 count += tpd_ring[i].count; 992 } 993 994 rfd_ring->buffer_info = 995 (tpd_ring->buffer_info + count); 996 count += rfd_ring->count; 997 rx_desc_count += rfd_ring->count; 998 999 /* 1000 * real ring DMA buffer 1001 * each ring/block may need up to 8 bytes for alignment, hence the 1002 * additional bytes tacked onto the end. 1003 */ 1004 ring_header->size = size = 1005 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1006 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1007 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1008 8 * 4; 1009 1010 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size, 1011 &ring_header->dma); 1012 if (unlikely(!ring_header->desc)) { 1013 dev_err(&pdev->dev, "pci_alloc_consistend failed\n"); 1014 goto err_nomem; 1015 } 1016 memset(ring_header->desc, 0, ring_header->size); 1017 /* init TPD ring */ 1018 1019 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1020 offset = tpd_ring[0].dma - ring_header->dma; 1021 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1022 tpd_ring[i].dma = ring_header->dma + offset; 1023 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1024 tpd_ring[i].size = 1025 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1026 offset += roundup(tpd_ring[i].size, 8); 1027 } 1028 /* init RFD ring */ 1029 rfd_ring->dma = ring_header->dma + offset; 1030 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1031 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1032 offset += roundup(rfd_ring->size, 8); 1033 1034 /* init RRD ring */ 1035 rrd_ring->dma = ring_header->dma + offset; 1036 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1037 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1038 rrd_ring->count; 1039 offset += roundup(rrd_ring->size, 8); 1040 1041 return 0; 1042 1043 err_nomem: 1044 kfree(tpd_ring->buffer_info); 1045 return -ENOMEM; 1046 } 1047 1048 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1049 { 1050 struct atl1c_hw *hw = &adapter->hw; 1051 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1052 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1053 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1054 adapter->tpd_ring; 1055 1056 /* TPD */ 1057 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1058 (u32)((tpd_ring[atl1c_trans_normal].dma & 1059 AT_DMA_HI_ADDR_MASK) >> 32)); 1060 /* just enable normal priority TX queue */ 1061 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1062 (u32)(tpd_ring[atl1c_trans_normal].dma & 1063 AT_DMA_LO_ADDR_MASK)); 1064 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1065 (u32)(tpd_ring[atl1c_trans_high].dma & 1066 AT_DMA_LO_ADDR_MASK)); 1067 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1068 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1069 1070 1071 /* RFD */ 1072 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1073 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1074 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1075 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1076 1077 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1078 rfd_ring->count & RFD_RING_SIZE_MASK); 1079 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1080 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1081 1082 /* RRD */ 1083 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1084 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1085 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1086 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1087 1088 if (hw->nic_type == athr_l2c_b) { 1089 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1090 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1091 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1092 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1093 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1094 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1095 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1096 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1097 } 1098 /* Load all of base address above */ 1099 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1100 } 1101 1102 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1103 { 1104 struct atl1c_hw *hw = &adapter->hw; 1105 int max_pay_load; 1106 u16 tx_offload_thresh; 1107 u32 txq_ctrl_data; 1108 1109 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1110 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1111 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1112 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1113 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1114 /* 1115 * if BIOS had changed the dam-read-max-length to an invalid value, 1116 * restore it to default value 1117 */ 1118 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1119 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1120 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1121 } 1122 txq_ctrl_data = 1123 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1124 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1125 1126 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1127 } 1128 1129 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1130 { 1131 struct atl1c_hw *hw = &adapter->hw; 1132 u32 rxq_ctrl_data; 1133 1134 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1135 RXQ_RFD_BURST_NUM_SHIFT; 1136 1137 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1138 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1139 1140 /* aspm for gigabit */ 1141 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1142 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1143 ASPM_THRUPUT_LIMIT_100M); 1144 1145 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1146 } 1147 1148 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1149 { 1150 struct atl1c_hw *hw = &adapter->hw; 1151 u32 dma_ctrl_data; 1152 1153 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1154 DMA_CTRL_RREQ_PRI_DATA | 1155 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1156 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1157 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1158 1159 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1160 } 1161 1162 /* 1163 * Stop the mac, transmit and receive units 1164 * hw - Struct containing variables accessed by shared code 1165 * return : 0 or idle status (if error) 1166 */ 1167 static int atl1c_stop_mac(struct atl1c_hw *hw) 1168 { 1169 u32 data; 1170 1171 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1172 data &= ~RXQ_CTRL_EN; 1173 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1174 1175 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1176 data &= ~TXQ_CTRL_EN; 1177 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1178 1179 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1180 1181 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1182 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1183 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1184 1185 return (int)atl1c_wait_until_idle(hw, 1186 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1187 } 1188 1189 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1190 { 1191 struct atl1c_hw *hw = &adapter->hw; 1192 u32 mac, txq, rxq; 1193 1194 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false; 1195 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1196 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1197 1198 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1199 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1200 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1201 1202 txq |= TXQ_CTRL_EN; 1203 rxq |= RXQ_CTRL_EN; 1204 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1205 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1206 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1207 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1208 MAC_CTRL_HASH_ALG_CRC32; 1209 if (hw->mac_duplex) 1210 mac |= MAC_CTRL_DUPLX; 1211 else 1212 mac &= ~MAC_CTRL_DUPLX; 1213 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1214 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1215 1216 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1217 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1218 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1219 } 1220 1221 /* 1222 * Reset the transmit and receive units; mask and clear all interrupts. 1223 * hw - Struct containing variables accessed by shared code 1224 * return : 0 or idle status (if error) 1225 */ 1226 static int atl1c_reset_mac(struct atl1c_hw *hw) 1227 { 1228 struct atl1c_adapter *adapter = hw->adapter; 1229 struct pci_dev *pdev = adapter->pdev; 1230 u32 ctrl_data = 0; 1231 1232 atl1c_stop_mac(hw); 1233 /* 1234 * Issue Soft Reset to the MAC. This will reset the chip's 1235 * transmit, receive, DMA. It will not effect 1236 * the current PCI configuration. The global reset bit is self- 1237 * clearing, and should clear within a microsecond. 1238 */ 1239 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1240 ctrl_data |= MASTER_CTRL_OOB_DIS; 1241 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1242 1243 AT_WRITE_FLUSH(hw); 1244 msleep(10); 1245 /* Wait at least 10ms for All module to be Idle */ 1246 1247 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1248 dev_err(&pdev->dev, 1249 "MAC state machine can't be idle since" 1250 " disabled for 10ms second\n"); 1251 return -1; 1252 } 1253 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1254 1255 /* driver control speed/duplex */ 1256 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1257 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1258 1259 /* clk switch setting */ 1260 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1261 switch (hw->nic_type) { 1262 case athr_l2c_b: 1263 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1264 SERDES_MAC_CLK_SLOWDOWN); 1265 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1266 break; 1267 case athr_l2c_b2: 1268 case athr_l1d_2: 1269 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1270 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1271 break; 1272 default: 1273 break; 1274 } 1275 1276 return 0; 1277 } 1278 1279 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1280 { 1281 u16 ctrl_flags = hw->ctrl_flags; 1282 1283 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1284 atl1c_set_aspm(hw, SPEED_0); 1285 hw->ctrl_flags = ctrl_flags; 1286 } 1287 1288 /* 1289 * Set ASPM state. 1290 * Enable/disable L0s/L1 depend on link state. 1291 */ 1292 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1293 { 1294 u32 pm_ctrl_data; 1295 u32 link_l1_timer; 1296 1297 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1298 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1299 PM_CTRL_ASPM_L0S_EN | 1300 PM_CTRL_MAC_ASPM_CHK); 1301 /* L1 timer */ 1302 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1303 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1304 link_l1_timer = 1305 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1306 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1307 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1308 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1309 } else { 1310 link_l1_timer = hw->nic_type == athr_l2c_b ? 1311 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1312 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1313 link_l1_timer = 1; 1314 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1315 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1316 } 1317 1318 /* L0S/L1 enable */ 1319 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1320 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1321 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1322 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1323 1324 /* l2cb & l1d & l2cb2 & l1d2 */ 1325 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1326 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1327 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1328 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1329 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1330 PM_CTRL_SERDES_PD_EX_L1 | 1331 PM_CTRL_CLK_SWH_L1; 1332 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1333 PM_CTRL_SERDES_PLL_L1_EN | 1334 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1335 PM_CTRL_SA_DLY_EN | 1336 PM_CTRL_HOTRST); 1337 /* disable l0s if link down or l2cb */ 1338 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1339 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1340 } else { /* l1c */ 1341 pm_ctrl_data = 1342 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1343 if (link_speed != SPEED_0) { 1344 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1345 PM_CTRL_SERDES_PLL_L1_EN | 1346 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1347 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1348 PM_CTRL_CLK_SWH_L1 | 1349 PM_CTRL_ASPM_L0S_EN | 1350 PM_CTRL_ASPM_L1_EN); 1351 } else { /* link down */ 1352 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1353 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1354 PM_CTRL_SERDES_PLL_L1_EN | 1355 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1356 PM_CTRL_ASPM_L0S_EN); 1357 } 1358 } 1359 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1360 1361 return; 1362 } 1363 1364 /** 1365 * atl1c_configure - Configure Transmit&Receive Unit after Reset 1366 * @adapter: board private structure 1367 * 1368 * Configure the Tx /Rx unit of the MAC after a reset. 1369 */ 1370 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1371 { 1372 struct atl1c_hw *hw = &adapter->hw; 1373 u32 master_ctrl_data = 0; 1374 u32 intr_modrt_data; 1375 u32 data; 1376 1377 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1378 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1379 MASTER_CTRL_RX_ITIMER_EN | 1380 MASTER_CTRL_INT_RDCLR); 1381 /* clear interrupt status */ 1382 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1383 /* Clear any WOL status */ 1384 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1385 /* set Interrupt Clear Timer 1386 * HW will enable self to assert interrupt event to system after 1387 * waiting x-time for software to notify it accept interrupt. 1388 */ 1389 1390 data = CLK_GATING_EN_ALL; 1391 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1392 if (hw->nic_type == athr_l2c_b) 1393 data &= ~CLK_GATING_RXMAC_EN; 1394 } else 1395 data = 0; 1396 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1397 1398 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1399 hw->ict & INT_RETRIG_TIMER_MASK); 1400 1401 atl1c_configure_des_ring(adapter); 1402 1403 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1404 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1405 IRQ_MODRT_TX_TIMER_SHIFT; 1406 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1407 IRQ_MODRT_RX_TIMER_SHIFT; 1408 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1409 master_ctrl_data |= 1410 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1411 } 1412 1413 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1414 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1415 1416 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1417 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1418 1419 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1420 hw->smb_timer & SMB_STAT_TIMER_MASK); 1421 1422 /* set MTU */ 1423 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1424 VLAN_HLEN + ETH_FCS_LEN); 1425 1426 atl1c_configure_tx(adapter); 1427 atl1c_configure_rx(adapter); 1428 atl1c_configure_dma(adapter); 1429 1430 return 0; 1431 } 1432 1433 static int atl1c_configure(struct atl1c_adapter *adapter) 1434 { 1435 struct net_device *netdev = adapter->netdev; 1436 int num; 1437 1438 atl1c_init_ring_ptrs(adapter); 1439 atl1c_set_multi(netdev); 1440 atl1c_restore_vlan(adapter); 1441 1442 num = atl1c_alloc_rx_buffer(adapter); 1443 if (unlikely(num == 0)) 1444 return -ENOMEM; 1445 1446 if (atl1c_configure_mac(adapter)) 1447 return -EIO; 1448 1449 return 0; 1450 } 1451 1452 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1453 { 1454 u16 hw_reg_addr = 0; 1455 unsigned long *stats_item = NULL; 1456 u32 data; 1457 1458 /* update rx status */ 1459 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1460 stats_item = &adapter->hw_stats.rx_ok; 1461 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1462 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1463 *stats_item += data; 1464 stats_item++; 1465 hw_reg_addr += 4; 1466 } 1467 /* update tx status */ 1468 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1469 stats_item = &adapter->hw_stats.tx_ok; 1470 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1471 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1472 *stats_item += data; 1473 stats_item++; 1474 hw_reg_addr += 4; 1475 } 1476 } 1477 1478 /** 1479 * atl1c_get_stats - Get System Network Statistics 1480 * @netdev: network interface device structure 1481 * 1482 * Returns the address of the device statistics structure. 1483 * The statistics are actually updated from the timer callback. 1484 */ 1485 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1486 { 1487 struct atl1c_adapter *adapter = netdev_priv(netdev); 1488 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1489 struct net_device_stats *net_stats = &netdev->stats; 1490 1491 atl1c_update_hw_stats(adapter); 1492 net_stats->rx_packets = hw_stats->rx_ok; 1493 net_stats->tx_packets = hw_stats->tx_ok; 1494 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1495 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1496 net_stats->multicast = hw_stats->rx_mcast; 1497 net_stats->collisions = hw_stats->tx_1_col + 1498 hw_stats->tx_2_col * 2 + 1499 hw_stats->tx_late_col + hw_stats->tx_abort_col; 1500 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err + 1501 hw_stats->rx_len_err + hw_stats->rx_sz_ov + 1502 hw_stats->rx_rrd_ov + hw_stats->rx_align_err; 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_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; 1508 1509 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; 1510 1511 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col + 1512 hw_stats->tx_underrun + hw_stats->tx_trunc; 1513 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1514 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1515 net_stats->tx_window_errors = hw_stats->tx_late_col; 1516 1517 return net_stats; 1518 } 1519 1520 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1521 { 1522 u16 phy_data; 1523 1524 spin_lock(&adapter->mdio_lock); 1525 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1526 spin_unlock(&adapter->mdio_lock); 1527 } 1528 1529 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter, 1530 enum atl1c_trans_queue type) 1531 { 1532 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1533 struct atl1c_buffer *buffer_info; 1534 struct pci_dev *pdev = adapter->pdev; 1535 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1536 u16 hw_next_to_clean; 1537 u16 reg; 1538 1539 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX; 1540 1541 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean); 1542 1543 while (next_to_clean != hw_next_to_clean) { 1544 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1545 atl1c_clean_buffer(pdev, buffer_info, 1); 1546 if (++next_to_clean == tpd_ring->count) 1547 next_to_clean = 0; 1548 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1549 } 1550 1551 if (netif_queue_stopped(adapter->netdev) && 1552 netif_carrier_ok(adapter->netdev)) { 1553 netif_wake_queue(adapter->netdev); 1554 } 1555 1556 return true; 1557 } 1558 1559 /** 1560 * atl1c_intr - Interrupt Handler 1561 * @irq: interrupt number 1562 * @data: pointer to a network interface device structure 1563 */ 1564 static irqreturn_t atl1c_intr(int irq, void *data) 1565 { 1566 struct net_device *netdev = data; 1567 struct atl1c_adapter *adapter = netdev_priv(netdev); 1568 struct pci_dev *pdev = adapter->pdev; 1569 struct atl1c_hw *hw = &adapter->hw; 1570 int max_ints = AT_MAX_INT_WORK; 1571 int handled = IRQ_NONE; 1572 u32 status; 1573 u32 reg_data; 1574 1575 do { 1576 AT_READ_REG(hw, REG_ISR, ®_data); 1577 status = reg_data & hw->intr_mask; 1578 1579 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1580 if (max_ints != AT_MAX_INT_WORK) 1581 handled = IRQ_HANDLED; 1582 break; 1583 } 1584 /* link event */ 1585 if (status & ISR_GPHY) 1586 atl1c_clear_phy_int(adapter); 1587 /* Ack ISR */ 1588 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1589 if (status & ISR_RX_PKT) { 1590 if (likely(napi_schedule_prep(&adapter->napi))) { 1591 hw->intr_mask &= ~ISR_RX_PKT; 1592 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1593 __napi_schedule(&adapter->napi); 1594 } 1595 } 1596 if (status & ISR_TX_PKT) 1597 atl1c_clean_tx_irq(adapter, atl1c_trans_normal); 1598 1599 handled = IRQ_HANDLED; 1600 /* check if PCIE PHY Link down */ 1601 if (status & ISR_ERROR) { 1602 if (netif_msg_hw(adapter)) 1603 dev_err(&pdev->dev, 1604 "atl1c hardware error (status = 0x%x)\n", 1605 status & ISR_ERROR); 1606 /* reset MAC */ 1607 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1608 schedule_work(&adapter->common_task); 1609 return IRQ_HANDLED; 1610 } 1611 1612 if (status & ISR_OVER) 1613 if (netif_msg_intr(adapter)) 1614 dev_warn(&pdev->dev, 1615 "TX/RX overflow (status = 0x%x)\n", 1616 status & ISR_OVER); 1617 1618 /* link event */ 1619 if (status & (ISR_GPHY | ISR_MANUAL)) { 1620 netdev->stats.tx_carrier_errors++; 1621 atl1c_link_chg_event(adapter); 1622 break; 1623 } 1624 1625 } while (--max_ints > 0); 1626 /* re-enable Interrupt*/ 1627 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1628 return handled; 1629 } 1630 1631 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1632 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1633 { 1634 /* 1635 * The pid field in RRS in not correct sometimes, so we 1636 * cannot figure out if the packet is fragmented or not, 1637 * so we tell the KERNEL CHECKSUM_NONE 1638 */ 1639 skb_checksum_none_assert(skb); 1640 } 1641 1642 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter) 1643 { 1644 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1645 struct pci_dev *pdev = adapter->pdev; 1646 struct atl1c_buffer *buffer_info, *next_info; 1647 struct sk_buff *skb; 1648 void *vir_addr = NULL; 1649 u16 num_alloc = 0; 1650 u16 rfd_next_to_use, next_next; 1651 struct atl1c_rx_free_desc *rfd_desc; 1652 dma_addr_t mapping; 1653 1654 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1655 if (++next_next == rfd_ring->count) 1656 next_next = 0; 1657 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1658 next_info = &rfd_ring->buffer_info[next_next]; 1659 1660 while (next_info->flags & ATL1C_BUFFER_FREE) { 1661 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1662 1663 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len); 1664 if (unlikely(!skb)) { 1665 if (netif_msg_rx_err(adapter)) 1666 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1667 break; 1668 } 1669 1670 /* 1671 * Make buffer alignment 2 beyond a 16 byte boundary 1672 * this will result in a 16 byte aligned IP header after 1673 * the 14 byte MAC header is removed 1674 */ 1675 vir_addr = skb->data; 1676 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1677 buffer_info->skb = skb; 1678 buffer_info->length = adapter->rx_buffer_len; 1679 mapping = pci_map_single(pdev, vir_addr, 1680 buffer_info->length, 1681 PCI_DMA_FROMDEVICE); 1682 if (unlikely(pci_dma_mapping_error(pdev, mapping))) { 1683 dev_kfree_skb(skb); 1684 buffer_info->skb = NULL; 1685 buffer_info->length = 0; 1686 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1687 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1688 break; 1689 } 1690 buffer_info->dma = mapping; 1691 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1692 ATL1C_PCIMAP_FROMDEVICE); 1693 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1694 rfd_next_to_use = next_next; 1695 if (++next_next == rfd_ring->count) 1696 next_next = 0; 1697 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1698 next_info = &rfd_ring->buffer_info[next_next]; 1699 num_alloc++; 1700 } 1701 1702 if (num_alloc) { 1703 /* TODO: update mailbox here */ 1704 wmb(); 1705 rfd_ring->next_to_use = rfd_next_to_use; 1706 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1707 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1708 } 1709 1710 return num_alloc; 1711 } 1712 1713 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1714 struct atl1c_recv_ret_status *rrs, u16 num) 1715 { 1716 u16 i; 1717 /* the relationship between rrd and rfd is one map one */ 1718 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1719 rrd_ring->next_to_clean)) { 1720 rrs->word3 &= ~RRS_RXD_UPDATED; 1721 if (++rrd_ring->next_to_clean == rrd_ring->count) 1722 rrd_ring->next_to_clean = 0; 1723 } 1724 } 1725 1726 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1727 struct atl1c_recv_ret_status *rrs, u16 num) 1728 { 1729 u16 i; 1730 u16 rfd_index; 1731 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1732 1733 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1734 RRS_RX_RFD_INDEX_MASK; 1735 for (i = 0; i < num; i++) { 1736 buffer_info[rfd_index].skb = NULL; 1737 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1738 ATL1C_BUFFER_FREE); 1739 if (++rfd_index == rfd_ring->count) 1740 rfd_index = 0; 1741 } 1742 rfd_ring->next_to_clean = rfd_index; 1743 } 1744 1745 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1746 int *work_done, int work_to_do) 1747 { 1748 u16 rfd_num, rfd_index; 1749 u16 count = 0; 1750 u16 length; 1751 struct pci_dev *pdev = adapter->pdev; 1752 struct net_device *netdev = adapter->netdev; 1753 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1754 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1755 struct sk_buff *skb; 1756 struct atl1c_recv_ret_status *rrs; 1757 struct atl1c_buffer *buffer_info; 1758 1759 while (1) { 1760 if (*work_done >= work_to_do) 1761 break; 1762 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1763 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1764 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1765 RRS_RX_RFD_CNT_MASK; 1766 if (unlikely(rfd_num != 1)) 1767 /* TODO support mul rfd*/ 1768 if (netif_msg_rx_err(adapter)) 1769 dev_warn(&pdev->dev, 1770 "Multi rfd not support yet!\n"); 1771 goto rrs_checked; 1772 } else { 1773 break; 1774 } 1775 rrs_checked: 1776 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1777 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1778 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1779 if (netif_msg_rx_err(adapter)) 1780 dev_warn(&pdev->dev, 1781 "wrong packet! rrs word3 is %x\n", 1782 rrs->word3); 1783 continue; 1784 } 1785 1786 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1787 RRS_PKT_SIZE_MASK); 1788 /* Good Receive */ 1789 if (likely(rfd_num == 1)) { 1790 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1791 RRS_RX_RFD_INDEX_MASK; 1792 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1793 pci_unmap_single(pdev, buffer_info->dma, 1794 buffer_info->length, PCI_DMA_FROMDEVICE); 1795 skb = buffer_info->skb; 1796 } else { 1797 /* TODO */ 1798 if (netif_msg_rx_err(adapter)) 1799 dev_warn(&pdev->dev, 1800 "Multi rfd not support yet!\n"); 1801 break; 1802 } 1803 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1804 skb_put(skb, length - ETH_FCS_LEN); 1805 skb->protocol = eth_type_trans(skb, netdev); 1806 atl1c_rx_checksum(adapter, skb, rrs); 1807 if (rrs->word3 & RRS_VLAN_INS) { 1808 u16 vlan; 1809 1810 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1811 vlan = le16_to_cpu(vlan); 1812 __vlan_hwaccel_put_tag(skb, vlan); 1813 } 1814 netif_receive_skb(skb); 1815 1816 (*work_done)++; 1817 count++; 1818 } 1819 if (count) 1820 atl1c_alloc_rx_buffer(adapter); 1821 } 1822 1823 /** 1824 * atl1c_clean - NAPI Rx polling callback 1825 */ 1826 static int atl1c_clean(struct napi_struct *napi, int budget) 1827 { 1828 struct atl1c_adapter *adapter = 1829 container_of(napi, struct atl1c_adapter, napi); 1830 int work_done = 0; 1831 1832 /* Keep link state information with original netdev */ 1833 if (!netif_carrier_ok(adapter->netdev)) 1834 goto quit_polling; 1835 /* just enable one RXQ */ 1836 atl1c_clean_rx_irq(adapter, &work_done, budget); 1837 1838 if (work_done < budget) { 1839 quit_polling: 1840 napi_complete(napi); 1841 adapter->hw.intr_mask |= ISR_RX_PKT; 1842 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1843 } 1844 return work_done; 1845 } 1846 1847 #ifdef CONFIG_NET_POLL_CONTROLLER 1848 1849 /* 1850 * Polling 'interrupt' - used by things like netconsole to send skbs 1851 * without having to re-enable interrupts. It's not called while 1852 * the interrupt routine is executing. 1853 */ 1854 static void atl1c_netpoll(struct net_device *netdev) 1855 { 1856 struct atl1c_adapter *adapter = netdev_priv(netdev); 1857 1858 disable_irq(adapter->pdev->irq); 1859 atl1c_intr(adapter->pdev->irq, netdev); 1860 enable_irq(adapter->pdev->irq); 1861 } 1862 #endif 1863 1864 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1865 { 1866 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1867 u16 next_to_use = 0; 1868 u16 next_to_clean = 0; 1869 1870 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1871 next_to_use = tpd_ring->next_to_use; 1872 1873 return (u16)(next_to_clean > next_to_use) ? 1874 (next_to_clean - next_to_use - 1) : 1875 (tpd_ring->count + next_to_clean - next_to_use - 1); 1876 } 1877 1878 /* 1879 * get next usable tpd 1880 * Note: should call atl1c_tdp_avail to make sure 1881 * there is enough tpd to use 1882 */ 1883 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1884 enum atl1c_trans_queue type) 1885 { 1886 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1887 struct atl1c_tpd_desc *tpd_desc; 1888 u16 next_to_use = 0; 1889 1890 next_to_use = tpd_ring->next_to_use; 1891 if (++tpd_ring->next_to_use == tpd_ring->count) 1892 tpd_ring->next_to_use = 0; 1893 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1894 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1895 return tpd_desc; 1896 } 1897 1898 static struct atl1c_buffer * 1899 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1900 { 1901 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1902 1903 return &tpd_ring->buffer_info[tpd - 1904 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1905 } 1906 1907 /* Calculate the transmit packet descript needed*/ 1908 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1909 { 1910 u16 tpd_req; 1911 u16 proto_hdr_len = 0; 1912 1913 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1914 1915 if (skb_is_gso(skb)) { 1916 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1917 if (proto_hdr_len < skb_headlen(skb)) 1918 tpd_req++; 1919 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1920 tpd_req++; 1921 } 1922 return tpd_req; 1923 } 1924 1925 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1926 struct sk_buff *skb, 1927 struct atl1c_tpd_desc **tpd, 1928 enum atl1c_trans_queue type) 1929 { 1930 struct pci_dev *pdev = adapter->pdev; 1931 u8 hdr_len; 1932 u32 real_len; 1933 unsigned short offload_type; 1934 int err; 1935 1936 if (skb_is_gso(skb)) { 1937 if (skb_header_cloned(skb)) { 1938 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 1939 if (unlikely(err)) 1940 return -1; 1941 } 1942 offload_type = skb_shinfo(skb)->gso_type; 1943 1944 if (offload_type & SKB_GSO_TCPV4) { 1945 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1946 + ntohs(ip_hdr(skb)->tot_len)); 1947 1948 if (real_len < skb->len) 1949 pskb_trim(skb, real_len); 1950 1951 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1952 if (unlikely(skb->len == hdr_len)) { 1953 /* only xsum need */ 1954 if (netif_msg_tx_queued(adapter)) 1955 dev_warn(&pdev->dev, 1956 "IPV4 tso with zero data??\n"); 1957 goto check_sum; 1958 } else { 1959 ip_hdr(skb)->check = 0; 1960 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 1961 ip_hdr(skb)->saddr, 1962 ip_hdr(skb)->daddr, 1963 0, IPPROTO_TCP, 0); 1964 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 1965 } 1966 } 1967 1968 if (offload_type & SKB_GSO_TCPV6) { 1969 struct atl1c_tpd_ext_desc *etpd = 1970 *(struct atl1c_tpd_ext_desc **)(tpd); 1971 1972 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 1973 *tpd = atl1c_get_tpd(adapter, type); 1974 ipv6_hdr(skb)->payload_len = 0; 1975 /* check payload == 0 byte ? */ 1976 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1977 if (unlikely(skb->len == hdr_len)) { 1978 /* only xsum need */ 1979 if (netif_msg_tx_queued(adapter)) 1980 dev_warn(&pdev->dev, 1981 "IPV6 tso with zero data??\n"); 1982 goto check_sum; 1983 } else 1984 tcp_hdr(skb)->check = ~csum_ipv6_magic( 1985 &ipv6_hdr(skb)->saddr, 1986 &ipv6_hdr(skb)->daddr, 1987 0, IPPROTO_TCP, 0); 1988 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 1989 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 1990 etpd->pkt_len = cpu_to_le32(skb->len); 1991 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 1992 } 1993 1994 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 1995 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 1996 TPD_TCPHDR_OFFSET_SHIFT; 1997 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 1998 TPD_MSS_SHIFT; 1999 return 0; 2000 } 2001 2002 check_sum: 2003 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2004 u8 css, cso; 2005 cso = skb_checksum_start_offset(skb); 2006 2007 if (unlikely(cso & 0x1)) { 2008 if (netif_msg_tx_err(adapter)) 2009 dev_err(&adapter->pdev->dev, 2010 "payload offset should not an event number\n"); 2011 return -1; 2012 } else { 2013 css = cso + skb->csum_offset; 2014 2015 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2016 TPD_PLOADOFFSET_SHIFT; 2017 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2018 TPD_CCSUM_OFFSET_SHIFT; 2019 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2020 } 2021 } 2022 return 0; 2023 } 2024 2025 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2026 struct atl1c_tpd_desc *first_tpd, 2027 enum atl1c_trans_queue type) 2028 { 2029 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2030 struct atl1c_buffer *buffer_info; 2031 struct atl1c_tpd_desc *tpd; 2032 u16 first_index, index; 2033 2034 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2035 index = first_index; 2036 while (index != tpd_ring->next_to_use) { 2037 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2038 buffer_info = &tpd_ring->buffer_info[index]; 2039 atl1c_clean_buffer(adpt->pdev, buffer_info, 0); 2040 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2041 if (++index == tpd_ring->count) 2042 index = 0; 2043 } 2044 tpd_ring->next_to_use = first_index; 2045 } 2046 2047 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2048 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2049 enum atl1c_trans_queue type) 2050 { 2051 struct atl1c_tpd_desc *use_tpd = NULL; 2052 struct atl1c_buffer *buffer_info = NULL; 2053 u16 buf_len = skb_headlen(skb); 2054 u16 map_len = 0; 2055 u16 mapped_len = 0; 2056 u16 hdr_len = 0; 2057 u16 nr_frags; 2058 u16 f; 2059 int tso; 2060 2061 nr_frags = skb_shinfo(skb)->nr_frags; 2062 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2063 if (tso) { 2064 /* TSO */ 2065 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2066 use_tpd = tpd; 2067 2068 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2069 buffer_info->length = map_len; 2070 buffer_info->dma = pci_map_single(adapter->pdev, 2071 skb->data, hdr_len, PCI_DMA_TODEVICE); 2072 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2073 buffer_info->dma))) 2074 goto err_dma; 2075 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2076 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2077 ATL1C_PCIMAP_TODEVICE); 2078 mapped_len += map_len; 2079 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2080 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2081 } 2082 2083 if (mapped_len < buf_len) { 2084 /* mapped_len == 0, means we should use the first tpd, 2085 which is given by caller */ 2086 if (mapped_len == 0) 2087 use_tpd = tpd; 2088 else { 2089 use_tpd = atl1c_get_tpd(adapter, type); 2090 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2091 } 2092 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2093 buffer_info->length = buf_len - mapped_len; 2094 buffer_info->dma = 2095 pci_map_single(adapter->pdev, skb->data + mapped_len, 2096 buffer_info->length, PCI_DMA_TODEVICE); 2097 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2098 buffer_info->dma))) 2099 goto err_dma; 2100 2101 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2102 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2103 ATL1C_PCIMAP_TODEVICE); 2104 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2105 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2106 } 2107 2108 for (f = 0; f < nr_frags; f++) { 2109 struct skb_frag_struct *frag; 2110 2111 frag = &skb_shinfo(skb)->frags[f]; 2112 2113 use_tpd = atl1c_get_tpd(adapter, type); 2114 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2115 2116 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2117 buffer_info->length = skb_frag_size(frag); 2118 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2119 frag, 0, 2120 buffer_info->length, 2121 DMA_TO_DEVICE); 2122 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2123 goto err_dma; 2124 2125 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2126 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2127 ATL1C_PCIMAP_TODEVICE); 2128 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2129 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2130 } 2131 2132 /* The last tpd */ 2133 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2134 /* The last buffer info contain the skb address, 2135 so it will be free after unmap */ 2136 buffer_info->skb = skb; 2137 2138 return 0; 2139 2140 err_dma: 2141 buffer_info->dma = 0; 2142 buffer_info->length = 0; 2143 return -1; 2144 } 2145 2146 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2147 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2148 { 2149 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2150 u16 reg; 2151 2152 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2153 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2154 } 2155 2156 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2157 struct net_device *netdev) 2158 { 2159 struct atl1c_adapter *adapter = netdev_priv(netdev); 2160 unsigned long flags; 2161 u16 tpd_req = 1; 2162 struct atl1c_tpd_desc *tpd; 2163 enum atl1c_trans_queue type = atl1c_trans_normal; 2164 2165 if (test_bit(__AT_DOWN, &adapter->flags)) { 2166 dev_kfree_skb_any(skb); 2167 return NETDEV_TX_OK; 2168 } 2169 2170 tpd_req = atl1c_cal_tpd_req(skb); 2171 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) { 2172 if (netif_msg_pktdata(adapter)) 2173 dev_info(&adapter->pdev->dev, "tx locked\n"); 2174 return NETDEV_TX_LOCKED; 2175 } 2176 2177 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2178 /* no enough descriptor, just stop queue */ 2179 netif_stop_queue(netdev); 2180 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2181 return NETDEV_TX_BUSY; 2182 } 2183 2184 tpd = atl1c_get_tpd(adapter, type); 2185 2186 /* do TSO and check sum */ 2187 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2188 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2189 dev_kfree_skb_any(skb); 2190 return NETDEV_TX_OK; 2191 } 2192 2193 if (unlikely(vlan_tx_tag_present(skb))) { 2194 u16 vlan = vlan_tx_tag_get(skb); 2195 __le16 tag; 2196 2197 vlan = cpu_to_le16(vlan); 2198 AT_VLAN_TO_TAG(vlan, tag); 2199 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2200 tpd->vlan_tag = tag; 2201 } 2202 2203 if (skb_network_offset(skb) != ETH_HLEN) 2204 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2205 2206 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2207 netif_info(adapter, tx_done, adapter->netdev, 2208 "tx-skb droppted due to dma error\n"); 2209 /* roll back tpd/buffer */ 2210 atl1c_tx_rollback(adapter, tpd, type); 2211 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2212 dev_kfree_skb(skb); 2213 } else { 2214 atl1c_tx_queue(adapter, skb, tpd, type); 2215 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2216 } 2217 2218 return NETDEV_TX_OK; 2219 } 2220 2221 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2222 { 2223 struct net_device *netdev = adapter->netdev; 2224 2225 free_irq(adapter->pdev->irq, netdev); 2226 2227 if (adapter->have_msi) 2228 pci_disable_msi(adapter->pdev); 2229 } 2230 2231 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2232 { 2233 struct pci_dev *pdev = adapter->pdev; 2234 struct net_device *netdev = adapter->netdev; 2235 int flags = 0; 2236 int err = 0; 2237 2238 adapter->have_msi = true; 2239 err = pci_enable_msi(adapter->pdev); 2240 if (err) { 2241 if (netif_msg_ifup(adapter)) 2242 dev_err(&pdev->dev, 2243 "Unable to allocate MSI interrupt Error: %d\n", 2244 err); 2245 adapter->have_msi = false; 2246 } 2247 2248 if (!adapter->have_msi) 2249 flags |= IRQF_SHARED; 2250 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2251 netdev->name, netdev); 2252 if (err) { 2253 if (netif_msg_ifup(adapter)) 2254 dev_err(&pdev->dev, 2255 "Unable to allocate interrupt Error: %d\n", 2256 err); 2257 if (adapter->have_msi) 2258 pci_disable_msi(adapter->pdev); 2259 return err; 2260 } 2261 if (netif_msg_ifup(adapter)) 2262 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2263 return err; 2264 } 2265 2266 2267 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2268 { 2269 /* release tx-pending skbs and reset tx/rx ring index */ 2270 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2271 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2272 atl1c_clean_rx_ring(adapter); 2273 } 2274 2275 static int atl1c_up(struct atl1c_adapter *adapter) 2276 { 2277 struct net_device *netdev = adapter->netdev; 2278 int err; 2279 2280 netif_carrier_off(netdev); 2281 2282 err = atl1c_configure(adapter); 2283 if (unlikely(err)) 2284 goto err_up; 2285 2286 err = atl1c_request_irq(adapter); 2287 if (unlikely(err)) 2288 goto err_up; 2289 2290 atl1c_check_link_status(adapter); 2291 clear_bit(__AT_DOWN, &adapter->flags); 2292 napi_enable(&adapter->napi); 2293 atl1c_irq_enable(adapter); 2294 netif_start_queue(netdev); 2295 return err; 2296 2297 err_up: 2298 atl1c_clean_rx_ring(adapter); 2299 return err; 2300 } 2301 2302 static void atl1c_down(struct atl1c_adapter *adapter) 2303 { 2304 struct net_device *netdev = adapter->netdev; 2305 2306 atl1c_del_timer(adapter); 2307 adapter->work_event = 0; /* clear all event */ 2308 /* signal that we're down so the interrupt handler does not 2309 * reschedule our watchdog timer */ 2310 set_bit(__AT_DOWN, &adapter->flags); 2311 netif_carrier_off(netdev); 2312 napi_disable(&adapter->napi); 2313 atl1c_irq_disable(adapter); 2314 atl1c_free_irq(adapter); 2315 /* disable ASPM if device inactive */ 2316 atl1c_disable_l0s_l1(&adapter->hw); 2317 /* reset MAC to disable all RX/TX */ 2318 atl1c_reset_mac(&adapter->hw); 2319 msleep(1); 2320 2321 adapter->link_speed = SPEED_0; 2322 adapter->link_duplex = -1; 2323 atl1c_reset_dma_ring(adapter); 2324 } 2325 2326 /** 2327 * atl1c_open - Called when a network interface is made active 2328 * @netdev: network interface device structure 2329 * 2330 * Returns 0 on success, negative value on failure 2331 * 2332 * The open entry point is called when a network interface is made 2333 * active by the system (IFF_UP). At this point all resources needed 2334 * for transmit and receive operations are allocated, the interrupt 2335 * handler is registered with the OS, the watchdog timer is started, 2336 * and the stack is notified that the interface is ready. 2337 */ 2338 static int atl1c_open(struct net_device *netdev) 2339 { 2340 struct atl1c_adapter *adapter = netdev_priv(netdev); 2341 int err; 2342 2343 /* disallow open during test */ 2344 if (test_bit(__AT_TESTING, &adapter->flags)) 2345 return -EBUSY; 2346 2347 /* allocate rx/tx dma buffer & descriptors */ 2348 err = atl1c_setup_ring_resources(adapter); 2349 if (unlikely(err)) 2350 return err; 2351 2352 err = atl1c_up(adapter); 2353 if (unlikely(err)) 2354 goto err_up; 2355 2356 return 0; 2357 2358 err_up: 2359 atl1c_free_irq(adapter); 2360 atl1c_free_ring_resources(adapter); 2361 atl1c_reset_mac(&adapter->hw); 2362 return err; 2363 } 2364 2365 /** 2366 * atl1c_close - Disables a network interface 2367 * @netdev: network interface device structure 2368 * 2369 * Returns 0, this is not allowed to fail 2370 * 2371 * The close entry point is called when an interface is de-activated 2372 * by the OS. The hardware is still under the drivers control, but 2373 * needs to be disabled. A global MAC reset is issued to stop the 2374 * hardware, and all transmit and receive resources are freed. 2375 */ 2376 static int atl1c_close(struct net_device *netdev) 2377 { 2378 struct atl1c_adapter *adapter = netdev_priv(netdev); 2379 2380 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2381 set_bit(__AT_DOWN, &adapter->flags); 2382 cancel_work_sync(&adapter->common_task); 2383 atl1c_down(adapter); 2384 atl1c_free_ring_resources(adapter); 2385 return 0; 2386 } 2387 2388 static int atl1c_suspend(struct device *dev) 2389 { 2390 struct pci_dev *pdev = to_pci_dev(dev); 2391 struct net_device *netdev = pci_get_drvdata(pdev); 2392 struct atl1c_adapter *adapter = netdev_priv(netdev); 2393 struct atl1c_hw *hw = &adapter->hw; 2394 u32 wufc = adapter->wol; 2395 2396 atl1c_disable_l0s_l1(hw); 2397 if (netif_running(netdev)) { 2398 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2399 atl1c_down(adapter); 2400 } 2401 netif_device_detach(netdev); 2402 2403 if (wufc) 2404 if (atl1c_phy_to_ps_link(hw) != 0) 2405 dev_dbg(&pdev->dev, "phy power saving failed"); 2406 2407 atl1c_power_saving(hw, wufc); 2408 2409 return 0; 2410 } 2411 2412 #ifdef CONFIG_PM_SLEEP 2413 static int atl1c_resume(struct device *dev) 2414 { 2415 struct pci_dev *pdev = to_pci_dev(dev); 2416 struct net_device *netdev = pci_get_drvdata(pdev); 2417 struct atl1c_adapter *adapter = netdev_priv(netdev); 2418 2419 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2420 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2421 2422 atl1c_phy_reset(&adapter->hw); 2423 atl1c_reset_mac(&adapter->hw); 2424 atl1c_phy_init(&adapter->hw); 2425 2426 #if 0 2427 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data); 2428 pm_data &= ~PM_CTRLSTAT_PME_EN; 2429 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data); 2430 #endif 2431 2432 netif_device_attach(netdev); 2433 if (netif_running(netdev)) 2434 atl1c_up(adapter); 2435 2436 return 0; 2437 } 2438 #endif 2439 2440 static void atl1c_shutdown(struct pci_dev *pdev) 2441 { 2442 struct net_device *netdev = pci_get_drvdata(pdev); 2443 struct atl1c_adapter *adapter = netdev_priv(netdev); 2444 2445 atl1c_suspend(&pdev->dev); 2446 pci_wake_from_d3(pdev, adapter->wol); 2447 pci_set_power_state(pdev, PCI_D3hot); 2448 } 2449 2450 static const struct net_device_ops atl1c_netdev_ops = { 2451 .ndo_open = atl1c_open, 2452 .ndo_stop = atl1c_close, 2453 .ndo_validate_addr = eth_validate_addr, 2454 .ndo_start_xmit = atl1c_xmit_frame, 2455 .ndo_set_mac_address = atl1c_set_mac_addr, 2456 .ndo_set_rx_mode = atl1c_set_multi, 2457 .ndo_change_mtu = atl1c_change_mtu, 2458 .ndo_fix_features = atl1c_fix_features, 2459 .ndo_set_features = atl1c_set_features, 2460 .ndo_do_ioctl = atl1c_ioctl, 2461 .ndo_tx_timeout = atl1c_tx_timeout, 2462 .ndo_get_stats = atl1c_get_stats, 2463 #ifdef CONFIG_NET_POLL_CONTROLLER 2464 .ndo_poll_controller = atl1c_netpoll, 2465 #endif 2466 }; 2467 2468 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2469 { 2470 SET_NETDEV_DEV(netdev, &pdev->dev); 2471 pci_set_drvdata(pdev, netdev); 2472 2473 netdev->netdev_ops = &atl1c_netdev_ops; 2474 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2475 atl1c_set_ethtool_ops(netdev); 2476 2477 /* TODO: add when ready */ 2478 netdev->hw_features = NETIF_F_SG | 2479 NETIF_F_HW_CSUM | 2480 NETIF_F_HW_VLAN_RX | 2481 NETIF_F_TSO | 2482 NETIF_F_TSO6; 2483 netdev->features = netdev->hw_features | 2484 NETIF_F_HW_VLAN_TX; 2485 return 0; 2486 } 2487 2488 /** 2489 * atl1c_probe - Device Initialization Routine 2490 * @pdev: PCI device information struct 2491 * @ent: entry in atl1c_pci_tbl 2492 * 2493 * Returns 0 on success, negative on failure 2494 * 2495 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2496 * The OS initialization, configuring of the adapter private structure, 2497 * and a hardware reset occur. 2498 */ 2499 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2500 { 2501 struct net_device *netdev; 2502 struct atl1c_adapter *adapter; 2503 static int cards_found; 2504 2505 int err = 0; 2506 2507 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2508 err = pci_enable_device_mem(pdev); 2509 if (err) { 2510 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2511 return err; 2512 } 2513 2514 /* 2515 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2516 * shared register for the high 32 bits, so only a single, aligned, 2517 * 4 GB physical address range can be used at a time. 2518 * 2519 * Supporting 64-bit DMA on this hardware is more trouble than it's 2520 * worth. It is far easier to limit to 32-bit DMA than update 2521 * various kernel subsystems to support the mechanics required by a 2522 * fixed-high-32-bit system. 2523 */ 2524 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || 2525 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) { 2526 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2527 goto err_dma; 2528 } 2529 2530 err = pci_request_regions(pdev, atl1c_driver_name); 2531 if (err) { 2532 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2533 goto err_pci_reg; 2534 } 2535 2536 pci_set_master(pdev); 2537 2538 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2539 if (netdev == NULL) { 2540 err = -ENOMEM; 2541 goto err_alloc_etherdev; 2542 } 2543 2544 err = atl1c_init_netdev(netdev, pdev); 2545 if (err) { 2546 dev_err(&pdev->dev, "init netdevice failed\n"); 2547 goto err_init_netdev; 2548 } 2549 adapter = netdev_priv(netdev); 2550 adapter->bd_number = cards_found; 2551 adapter->netdev = netdev; 2552 adapter->pdev = pdev; 2553 adapter->hw.adapter = adapter; 2554 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2555 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2556 if (!adapter->hw.hw_addr) { 2557 err = -EIO; 2558 dev_err(&pdev->dev, "cannot map device registers\n"); 2559 goto err_ioremap; 2560 } 2561 2562 /* init mii data */ 2563 adapter->mii.dev = netdev; 2564 adapter->mii.mdio_read = atl1c_mdio_read; 2565 adapter->mii.mdio_write = atl1c_mdio_write; 2566 adapter->mii.phy_id_mask = 0x1f; 2567 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2568 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2569 setup_timer(&adapter->phy_config_timer, atl1c_phy_config, 2570 (unsigned long)adapter); 2571 /* setup the private structure */ 2572 err = atl1c_sw_init(adapter); 2573 if (err) { 2574 dev_err(&pdev->dev, "net device private data init failed\n"); 2575 goto err_sw_init; 2576 } 2577 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2578 2579 /* Init GPHY as early as possible due to power saving issue */ 2580 atl1c_phy_reset(&adapter->hw); 2581 2582 err = atl1c_reset_mac(&adapter->hw); 2583 if (err) { 2584 err = -EIO; 2585 goto err_reset; 2586 } 2587 2588 /* reset the controller to 2589 * put the device in a known good starting state */ 2590 err = atl1c_phy_init(&adapter->hw); 2591 if (err) { 2592 err = -EIO; 2593 goto err_reset; 2594 } 2595 if (atl1c_read_mac_addr(&adapter->hw)) { 2596 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2597 netdev->addr_assign_type = NET_ADDR_RANDOM; 2598 } 2599 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2600 if (netif_msg_probe(adapter)) 2601 dev_dbg(&pdev->dev, "mac address : %pM\n", 2602 adapter->hw.mac_addr); 2603 2604 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2605 INIT_WORK(&adapter->common_task, atl1c_common_task); 2606 adapter->work_event = 0; 2607 err = register_netdev(netdev); 2608 if (err) { 2609 dev_err(&pdev->dev, "register netdevice failed\n"); 2610 goto err_register; 2611 } 2612 2613 if (netif_msg_probe(adapter)) 2614 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION); 2615 cards_found++; 2616 return 0; 2617 2618 err_reset: 2619 err_register: 2620 err_sw_init: 2621 iounmap(adapter->hw.hw_addr); 2622 err_init_netdev: 2623 err_ioremap: 2624 free_netdev(netdev); 2625 err_alloc_etherdev: 2626 pci_release_regions(pdev); 2627 err_pci_reg: 2628 err_dma: 2629 pci_disable_device(pdev); 2630 return err; 2631 } 2632 2633 /** 2634 * atl1c_remove - Device Removal Routine 2635 * @pdev: PCI device information struct 2636 * 2637 * atl1c_remove is called by the PCI subsystem to alert the driver 2638 * that it should release a PCI device. The could be caused by a 2639 * Hot-Plug event, or because the driver is going to be removed from 2640 * memory. 2641 */ 2642 static void atl1c_remove(struct pci_dev *pdev) 2643 { 2644 struct net_device *netdev = pci_get_drvdata(pdev); 2645 struct atl1c_adapter *adapter = netdev_priv(netdev); 2646 2647 unregister_netdev(netdev); 2648 /* restore permanent address */ 2649 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2650 atl1c_phy_disable(&adapter->hw); 2651 2652 iounmap(adapter->hw.hw_addr); 2653 2654 pci_release_regions(pdev); 2655 pci_disable_device(pdev); 2656 free_netdev(netdev); 2657 } 2658 2659 /** 2660 * atl1c_io_error_detected - called when PCI error is detected 2661 * @pdev: Pointer to PCI device 2662 * @state: The current pci connection state 2663 * 2664 * This function is called after a PCI bus error affecting 2665 * this device has been detected. 2666 */ 2667 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2668 pci_channel_state_t state) 2669 { 2670 struct net_device *netdev = pci_get_drvdata(pdev); 2671 struct atl1c_adapter *adapter = netdev_priv(netdev); 2672 2673 netif_device_detach(netdev); 2674 2675 if (state == pci_channel_io_perm_failure) 2676 return PCI_ERS_RESULT_DISCONNECT; 2677 2678 if (netif_running(netdev)) 2679 atl1c_down(adapter); 2680 2681 pci_disable_device(pdev); 2682 2683 /* Request a slot slot reset. */ 2684 return PCI_ERS_RESULT_NEED_RESET; 2685 } 2686 2687 /** 2688 * atl1c_io_slot_reset - called after the pci bus has been reset. 2689 * @pdev: Pointer to PCI device 2690 * 2691 * Restart the card from scratch, as if from a cold-boot. Implementation 2692 * resembles the first-half of the e1000_resume routine. 2693 */ 2694 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2695 { 2696 struct net_device *netdev = pci_get_drvdata(pdev); 2697 struct atl1c_adapter *adapter = netdev_priv(netdev); 2698 2699 if (pci_enable_device(pdev)) { 2700 if (netif_msg_hw(adapter)) 2701 dev_err(&pdev->dev, 2702 "Cannot re-enable PCI device after reset\n"); 2703 return PCI_ERS_RESULT_DISCONNECT; 2704 } 2705 pci_set_master(pdev); 2706 2707 pci_enable_wake(pdev, PCI_D3hot, 0); 2708 pci_enable_wake(pdev, PCI_D3cold, 0); 2709 2710 atl1c_reset_mac(&adapter->hw); 2711 2712 return PCI_ERS_RESULT_RECOVERED; 2713 } 2714 2715 /** 2716 * atl1c_io_resume - called when traffic can start flowing again. 2717 * @pdev: Pointer to PCI device 2718 * 2719 * This callback is called when the error recovery driver tells us that 2720 * its OK to resume normal operation. Implementation resembles the 2721 * second-half of the atl1c_resume routine. 2722 */ 2723 static void atl1c_io_resume(struct pci_dev *pdev) 2724 { 2725 struct net_device *netdev = pci_get_drvdata(pdev); 2726 struct atl1c_adapter *adapter = netdev_priv(netdev); 2727 2728 if (netif_running(netdev)) { 2729 if (atl1c_up(adapter)) { 2730 if (netif_msg_hw(adapter)) 2731 dev_err(&pdev->dev, 2732 "Cannot bring device back up after reset\n"); 2733 return; 2734 } 2735 } 2736 2737 netif_device_attach(netdev); 2738 } 2739 2740 static const struct pci_error_handlers atl1c_err_handler = { 2741 .error_detected = atl1c_io_error_detected, 2742 .slot_reset = atl1c_io_slot_reset, 2743 .resume = atl1c_io_resume, 2744 }; 2745 2746 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2747 2748 static struct pci_driver atl1c_driver = { 2749 .name = atl1c_driver_name, 2750 .id_table = atl1c_pci_tbl, 2751 .probe = atl1c_probe, 2752 .remove = atl1c_remove, 2753 .shutdown = atl1c_shutdown, 2754 .err_handler = &atl1c_err_handler, 2755 .driver.pm = &atl1c_pm_ops, 2756 }; 2757 2758 /** 2759 * atl1c_init_module - Driver Registration Routine 2760 * 2761 * atl1c_init_module is the first routine called when the driver is 2762 * loaded. All it does is register with the PCI subsystem. 2763 */ 2764 static int __init atl1c_init_module(void) 2765 { 2766 return pci_register_driver(&atl1c_driver); 2767 } 2768 2769 /** 2770 * atl1c_exit_module - Driver Exit Cleanup Routine 2771 * 2772 * atl1c_exit_module is called just before the driver is removed 2773 * from memory. 2774 */ 2775 static void __exit atl1c_exit_module(void) 2776 { 2777 pci_unregister_driver(&atl1c_driver); 2778 } 2779 2780 module_init(atl1c_init_module); 2781 module_exit(atl1c_exit_module); 2782