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 netdev->addr_assign_type &= ~NET_ADDR_RANDOM; 476 477 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 478 479 return 0; 480 } 481 482 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 483 struct net_device *dev) 484 { 485 int mtu = dev->mtu; 486 487 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 488 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 489 } 490 491 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 492 netdev_features_t features) 493 { 494 /* 495 * Since there is no support for separate rx/tx vlan accel 496 * enable/disable make sure tx flag is always in same state as rx. 497 */ 498 if (features & NETIF_F_HW_VLAN_RX) 499 features |= NETIF_F_HW_VLAN_TX; 500 else 501 features &= ~NETIF_F_HW_VLAN_TX; 502 503 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 504 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 505 506 return features; 507 } 508 509 static int atl1c_set_features(struct net_device *netdev, 510 netdev_features_t features) 511 { 512 netdev_features_t changed = netdev->features ^ features; 513 514 if (changed & NETIF_F_HW_VLAN_RX) 515 atl1c_vlan_mode(netdev, features); 516 517 return 0; 518 } 519 520 /** 521 * atl1c_change_mtu - Change the Maximum Transfer Unit 522 * @netdev: network interface device structure 523 * @new_mtu: new value for maximum frame size 524 * 525 * Returns 0 on success, negative on failure 526 */ 527 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 528 { 529 struct atl1c_adapter *adapter = netdev_priv(netdev); 530 struct atl1c_hw *hw = &adapter->hw; 531 int old_mtu = netdev->mtu; 532 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 533 534 /* Fast Ethernet controller doesn't support jumbo packet */ 535 if (((hw->nic_type == athr_l2c || 536 hw->nic_type == athr_l2c_b || 537 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) || 538 max_frame < ETH_ZLEN + ETH_FCS_LEN || 539 max_frame > MAX_JUMBO_FRAME_SIZE) { 540 if (netif_msg_link(adapter)) 541 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n"); 542 return -EINVAL; 543 } 544 /* set MTU */ 545 if (old_mtu != new_mtu && netif_running(netdev)) { 546 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 547 msleep(1); 548 netdev->mtu = new_mtu; 549 adapter->hw.max_frame_size = new_mtu; 550 atl1c_set_rxbufsize(adapter, netdev); 551 atl1c_down(adapter); 552 netdev_update_features(netdev); 553 atl1c_up(adapter); 554 clear_bit(__AT_RESETTING, &adapter->flags); 555 } 556 return 0; 557 } 558 559 /* 560 * caller should hold mdio_lock 561 */ 562 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num) 563 { 564 struct atl1c_adapter *adapter = netdev_priv(netdev); 565 u16 result; 566 567 atl1c_read_phy_reg(&adapter->hw, reg_num, &result); 568 return result; 569 } 570 571 static void atl1c_mdio_write(struct net_device *netdev, int phy_id, 572 int reg_num, int val) 573 { 574 struct atl1c_adapter *adapter = netdev_priv(netdev); 575 576 atl1c_write_phy_reg(&adapter->hw, reg_num, val); 577 } 578 579 static int atl1c_mii_ioctl(struct net_device *netdev, 580 struct ifreq *ifr, int cmd) 581 { 582 struct atl1c_adapter *adapter = netdev_priv(netdev); 583 struct pci_dev *pdev = adapter->pdev; 584 struct mii_ioctl_data *data = if_mii(ifr); 585 unsigned long flags; 586 int retval = 0; 587 588 if (!netif_running(netdev)) 589 return -EINVAL; 590 591 spin_lock_irqsave(&adapter->mdio_lock, flags); 592 switch (cmd) { 593 case SIOCGMIIPHY: 594 data->phy_id = 0; 595 break; 596 597 case SIOCGMIIREG: 598 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 599 &data->val_out)) { 600 retval = -EIO; 601 goto out; 602 } 603 break; 604 605 case SIOCSMIIREG: 606 if (data->reg_num & ~(0x1F)) { 607 retval = -EFAULT; 608 goto out; 609 } 610 611 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 612 data->reg_num, data->val_in); 613 if (atl1c_write_phy_reg(&adapter->hw, 614 data->reg_num, data->val_in)) { 615 retval = -EIO; 616 goto out; 617 } 618 break; 619 620 default: 621 retval = -EOPNOTSUPP; 622 break; 623 } 624 out: 625 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 626 return retval; 627 } 628 629 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 630 { 631 switch (cmd) { 632 case SIOCGMIIPHY: 633 case SIOCGMIIREG: 634 case SIOCSMIIREG: 635 return atl1c_mii_ioctl(netdev, ifr, cmd); 636 default: 637 return -EOPNOTSUPP; 638 } 639 } 640 641 /** 642 * atl1c_alloc_queues - Allocate memory for all rings 643 * @adapter: board private structure to initialize 644 * 645 */ 646 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 647 { 648 return 0; 649 } 650 651 static void atl1c_set_mac_type(struct atl1c_hw *hw) 652 { 653 switch (hw->device_id) { 654 case PCI_DEVICE_ID_ATTANSIC_L2C: 655 hw->nic_type = athr_l2c; 656 break; 657 case PCI_DEVICE_ID_ATTANSIC_L1C: 658 hw->nic_type = athr_l1c; 659 break; 660 case PCI_DEVICE_ID_ATHEROS_L2C_B: 661 hw->nic_type = athr_l2c_b; 662 break; 663 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 664 hw->nic_type = athr_l2c_b2; 665 break; 666 case PCI_DEVICE_ID_ATHEROS_L1D: 667 hw->nic_type = athr_l1d; 668 break; 669 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 670 hw->nic_type = athr_l1d_2; 671 break; 672 default: 673 break; 674 } 675 } 676 677 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 678 { 679 u32 link_ctrl_data; 680 681 atl1c_set_mac_type(hw); 682 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 683 684 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 685 ATL1C_TXQ_MODE_ENHANCE; 686 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 687 ATL1C_ASPM_L1_SUPPORT; 688 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 689 690 if (hw->nic_type == athr_l1c || 691 hw->nic_type == athr_l1d || 692 hw->nic_type == athr_l1d_2) 693 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 694 return 0; 695 } 696 697 struct atl1c_platform_patch { 698 u16 pci_did; 699 u8 pci_revid; 700 u16 subsystem_vid; 701 u16 subsystem_did; 702 u32 patch_flag; 703 #define ATL1C_LINK_PATCH 0x1 704 }; 705 static const struct atl1c_platform_patch plats[] = { 706 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 707 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 708 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 709 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 710 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 711 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 712 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 713 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 714 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 715 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 716 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 717 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 718 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 719 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 720 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 721 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 722 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 723 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 724 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 725 {0}, 726 }; 727 728 static void atl1c_patch_assign(struct atl1c_hw *hw) 729 { 730 struct pci_dev *pdev = hw->adapter->pdev; 731 u32 misc_ctrl; 732 int i = 0; 733 734 hw->msi_lnkpatch = false; 735 736 while (plats[i].pci_did != 0) { 737 if (plats[i].pci_did == hw->device_id && 738 plats[i].pci_revid == hw->revision_id && 739 plats[i].subsystem_vid == hw->subsystem_vendor_id && 740 plats[i].subsystem_did == hw->subsystem_id) { 741 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 742 hw->msi_lnkpatch = true; 743 } 744 i++; 745 } 746 747 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 748 hw->revision_id == L2CB_V21) { 749 /* config acess mode */ 750 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 751 REG_PCIE_DEV_MISC_CTRL); 752 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 753 misc_ctrl &= ~0x100; 754 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 755 REG_PCIE_DEV_MISC_CTRL); 756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 757 } 758 } 759 /** 760 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 761 * @adapter: board private structure to initialize 762 * 763 * atl1c_sw_init initializes the Adapter private data structure. 764 * Fields are initialized based on PCI device information and 765 * OS network device settings (MTU size). 766 */ 767 static int atl1c_sw_init(struct atl1c_adapter *adapter) 768 { 769 struct atl1c_hw *hw = &adapter->hw; 770 struct pci_dev *pdev = adapter->pdev; 771 u32 revision; 772 773 774 adapter->wol = 0; 775 device_set_wakeup_enable(&pdev->dev, false); 776 adapter->link_speed = SPEED_0; 777 adapter->link_duplex = FULL_DUPLEX; 778 adapter->tpd_ring[0].count = 1024; 779 adapter->rfd_ring.count = 512; 780 781 hw->vendor_id = pdev->vendor; 782 hw->device_id = pdev->device; 783 hw->subsystem_vendor_id = pdev->subsystem_vendor; 784 hw->subsystem_id = pdev->subsystem_device; 785 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 786 hw->revision_id = revision & 0xFF; 787 /* before link up, we assume hibernate is true */ 788 hw->hibernate = true; 789 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 790 if (atl1c_setup_mac_funcs(hw) != 0) { 791 dev_err(&pdev->dev, "set mac function pointers failed\n"); 792 return -1; 793 } 794 atl1c_patch_assign(hw); 795 796 hw->intr_mask = IMR_NORMAL_MASK; 797 hw->phy_configured = false; 798 hw->preamble_len = 7; 799 hw->max_frame_size = adapter->netdev->mtu; 800 hw->autoneg_advertised = ADVERTISED_Autoneg; 801 hw->indirect_tab = 0xE4E4E4E4; 802 hw->base_cpu = 0; 803 804 hw->ict = 50000; /* 100ms */ 805 hw->smb_timer = 200000; /* 400ms */ 806 hw->rx_imt = 200; 807 hw->tx_imt = 1000; 808 809 hw->tpd_burst = 5; 810 hw->rfd_burst = 8; 811 hw->dma_order = atl1c_dma_ord_out; 812 hw->dmar_block = atl1c_dma_req_1024; 813 814 if (atl1c_alloc_queues(adapter)) { 815 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 816 return -ENOMEM; 817 } 818 /* TODO */ 819 atl1c_set_rxbufsize(adapter, adapter->netdev); 820 atomic_set(&adapter->irq_sem, 1); 821 spin_lock_init(&adapter->mdio_lock); 822 spin_lock_init(&adapter->tx_lock); 823 set_bit(__AT_DOWN, &adapter->flags); 824 825 return 0; 826 } 827 828 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 829 struct atl1c_buffer *buffer_info, int in_irq) 830 { 831 u16 pci_driection; 832 if (buffer_info->flags & ATL1C_BUFFER_FREE) 833 return; 834 if (buffer_info->dma) { 835 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 836 pci_driection = PCI_DMA_FROMDEVICE; 837 else 838 pci_driection = PCI_DMA_TODEVICE; 839 840 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 841 pci_unmap_single(pdev, buffer_info->dma, 842 buffer_info->length, pci_driection); 843 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 844 pci_unmap_page(pdev, buffer_info->dma, 845 buffer_info->length, pci_driection); 846 } 847 if (buffer_info->skb) { 848 if (in_irq) 849 dev_kfree_skb_irq(buffer_info->skb); 850 else 851 dev_kfree_skb(buffer_info->skb); 852 } 853 buffer_info->dma = 0; 854 buffer_info->skb = NULL; 855 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 856 } 857 /** 858 * atl1c_clean_tx_ring - Free Tx-skb 859 * @adapter: board private structure 860 */ 861 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 862 enum atl1c_trans_queue type) 863 { 864 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 865 struct atl1c_buffer *buffer_info; 866 struct pci_dev *pdev = adapter->pdev; 867 u16 index, ring_count; 868 869 ring_count = tpd_ring->count; 870 for (index = 0; index < ring_count; index++) { 871 buffer_info = &tpd_ring->buffer_info[index]; 872 atl1c_clean_buffer(pdev, buffer_info, 0); 873 } 874 875 /* Zero out Tx-buffers */ 876 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 877 ring_count); 878 atomic_set(&tpd_ring->next_to_clean, 0); 879 tpd_ring->next_to_use = 0; 880 } 881 882 /** 883 * atl1c_clean_rx_ring - Free rx-reservation skbs 884 * @adapter: board private structure 885 */ 886 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 887 { 888 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 889 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 890 struct atl1c_buffer *buffer_info; 891 struct pci_dev *pdev = adapter->pdev; 892 int j; 893 894 for (j = 0; j < rfd_ring->count; j++) { 895 buffer_info = &rfd_ring->buffer_info[j]; 896 atl1c_clean_buffer(pdev, buffer_info, 0); 897 } 898 /* zero out the descriptor ring */ 899 memset(rfd_ring->desc, 0, rfd_ring->size); 900 rfd_ring->next_to_clean = 0; 901 rfd_ring->next_to_use = 0; 902 rrd_ring->next_to_use = 0; 903 rrd_ring->next_to_clean = 0; 904 } 905 906 /* 907 * Read / Write Ptr Initialize: 908 */ 909 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 910 { 911 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 912 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 913 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 914 struct atl1c_buffer *buffer_info; 915 int i, j; 916 917 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 918 tpd_ring[i].next_to_use = 0; 919 atomic_set(&tpd_ring[i].next_to_clean, 0); 920 buffer_info = tpd_ring[i].buffer_info; 921 for (j = 0; j < tpd_ring->count; j++) 922 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 923 ATL1C_BUFFER_FREE); 924 } 925 rfd_ring->next_to_use = 0; 926 rfd_ring->next_to_clean = 0; 927 rrd_ring->next_to_use = 0; 928 rrd_ring->next_to_clean = 0; 929 for (j = 0; j < rfd_ring->count; j++) { 930 buffer_info = &rfd_ring->buffer_info[j]; 931 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 932 } 933 } 934 935 /** 936 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 937 * @adapter: board private structure 938 * 939 * Free all transmit software resources 940 */ 941 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 942 { 943 struct pci_dev *pdev = adapter->pdev; 944 945 pci_free_consistent(pdev, adapter->ring_header.size, 946 adapter->ring_header.desc, 947 adapter->ring_header.dma); 948 adapter->ring_header.desc = NULL; 949 950 /* Note: just free tdp_ring.buffer_info, 951 * it contain rfd_ring.buffer_info, do not double free */ 952 if (adapter->tpd_ring[0].buffer_info) { 953 kfree(adapter->tpd_ring[0].buffer_info); 954 adapter->tpd_ring[0].buffer_info = NULL; 955 } 956 } 957 958 /** 959 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources 960 * @adapter: board private structure 961 * 962 * Return 0 on success, negative on failure 963 */ 964 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 965 { 966 struct pci_dev *pdev = adapter->pdev; 967 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 968 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 969 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 970 struct atl1c_ring_header *ring_header = &adapter->ring_header; 971 int size; 972 int i; 973 int count = 0; 974 int rx_desc_count = 0; 975 u32 offset = 0; 976 977 rrd_ring->count = rfd_ring->count; 978 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 979 tpd_ring[i].count = tpd_ring[0].count; 980 981 /* 2 tpd queue, one high priority queue, 982 * another normal priority queue */ 983 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 984 rfd_ring->count); 985 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 986 if (unlikely(!tpd_ring->buffer_info)) { 987 dev_err(&pdev->dev, "kzalloc failed, size = %d\n", 988 size); 989 goto err_nomem; 990 } 991 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 992 tpd_ring[i].buffer_info = 993 (tpd_ring->buffer_info + count); 994 count += tpd_ring[i].count; 995 } 996 997 rfd_ring->buffer_info = 998 (tpd_ring->buffer_info + count); 999 count += rfd_ring->count; 1000 rx_desc_count += rfd_ring->count; 1001 1002 /* 1003 * real ring DMA buffer 1004 * each ring/block may need up to 8 bytes for alignment, hence the 1005 * additional bytes tacked onto the end. 1006 */ 1007 ring_header->size = size = 1008 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1009 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1010 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1011 8 * 4; 1012 1013 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size, 1014 &ring_header->dma); 1015 if (unlikely(!ring_header->desc)) { 1016 dev_err(&pdev->dev, "pci_alloc_consistend failed\n"); 1017 goto err_nomem; 1018 } 1019 memset(ring_header->desc, 0, ring_header->size); 1020 /* init TPD ring */ 1021 1022 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1023 offset = tpd_ring[0].dma - ring_header->dma; 1024 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1025 tpd_ring[i].dma = ring_header->dma + offset; 1026 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1027 tpd_ring[i].size = 1028 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1029 offset += roundup(tpd_ring[i].size, 8); 1030 } 1031 /* init RFD ring */ 1032 rfd_ring->dma = ring_header->dma + offset; 1033 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1034 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1035 offset += roundup(rfd_ring->size, 8); 1036 1037 /* init RRD ring */ 1038 rrd_ring->dma = ring_header->dma + offset; 1039 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1040 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1041 rrd_ring->count; 1042 offset += roundup(rrd_ring->size, 8); 1043 1044 return 0; 1045 1046 err_nomem: 1047 kfree(tpd_ring->buffer_info); 1048 return -ENOMEM; 1049 } 1050 1051 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1052 { 1053 struct atl1c_hw *hw = &adapter->hw; 1054 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1055 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1056 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1057 adapter->tpd_ring; 1058 1059 /* TPD */ 1060 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1061 (u32)((tpd_ring[atl1c_trans_normal].dma & 1062 AT_DMA_HI_ADDR_MASK) >> 32)); 1063 /* just enable normal priority TX queue */ 1064 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1065 (u32)(tpd_ring[atl1c_trans_normal].dma & 1066 AT_DMA_LO_ADDR_MASK)); 1067 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1068 (u32)(tpd_ring[atl1c_trans_high].dma & 1069 AT_DMA_LO_ADDR_MASK)); 1070 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1071 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1072 1073 1074 /* RFD */ 1075 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1076 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1077 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1078 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1079 1080 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1081 rfd_ring->count & RFD_RING_SIZE_MASK); 1082 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1083 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1084 1085 /* RRD */ 1086 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1087 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1088 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1089 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1090 1091 if (hw->nic_type == athr_l2c_b) { 1092 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1093 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1094 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1095 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1096 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1097 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1098 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1099 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1100 } 1101 /* Load all of base address above */ 1102 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1103 } 1104 1105 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1106 { 1107 struct atl1c_hw *hw = &adapter->hw; 1108 int max_pay_load; 1109 u16 tx_offload_thresh; 1110 u32 txq_ctrl_data; 1111 1112 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1113 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1114 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1115 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1116 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1117 /* 1118 * if BIOS had changed the dam-read-max-length to an invalid value, 1119 * restore it to default value 1120 */ 1121 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1122 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1123 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1124 } 1125 txq_ctrl_data = 1126 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1127 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1128 1129 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1130 } 1131 1132 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1133 { 1134 struct atl1c_hw *hw = &adapter->hw; 1135 u32 rxq_ctrl_data; 1136 1137 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1138 RXQ_RFD_BURST_NUM_SHIFT; 1139 1140 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1141 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1142 1143 /* aspm for gigabit */ 1144 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1145 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1146 ASPM_THRUPUT_LIMIT_100M); 1147 1148 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1149 } 1150 1151 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1152 { 1153 struct atl1c_hw *hw = &adapter->hw; 1154 u32 dma_ctrl_data; 1155 1156 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1157 DMA_CTRL_RREQ_PRI_DATA | 1158 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1159 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1160 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1161 1162 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1163 } 1164 1165 /* 1166 * Stop the mac, transmit and receive units 1167 * hw - Struct containing variables accessed by shared code 1168 * return : 0 or idle status (if error) 1169 */ 1170 static int atl1c_stop_mac(struct atl1c_hw *hw) 1171 { 1172 u32 data; 1173 1174 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1175 data &= ~RXQ_CTRL_EN; 1176 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1177 1178 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1179 data &= ~TXQ_CTRL_EN; 1180 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1181 1182 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1183 1184 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1185 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1186 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1187 1188 return (int)atl1c_wait_until_idle(hw, 1189 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1190 } 1191 1192 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1193 { 1194 struct atl1c_hw *hw = &adapter->hw; 1195 u32 mac, txq, rxq; 1196 1197 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false; 1198 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1199 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1200 1201 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1202 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1203 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1204 1205 txq |= TXQ_CTRL_EN; 1206 rxq |= RXQ_CTRL_EN; 1207 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1208 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1209 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1210 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1211 MAC_CTRL_HASH_ALG_CRC32; 1212 if (hw->mac_duplex) 1213 mac |= MAC_CTRL_DUPLX; 1214 else 1215 mac &= ~MAC_CTRL_DUPLX; 1216 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1217 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1218 1219 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1220 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1221 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1222 } 1223 1224 /* 1225 * Reset the transmit and receive units; mask and clear all interrupts. 1226 * hw - Struct containing variables accessed by shared code 1227 * return : 0 or idle status (if error) 1228 */ 1229 static int atl1c_reset_mac(struct atl1c_hw *hw) 1230 { 1231 struct atl1c_adapter *adapter = hw->adapter; 1232 struct pci_dev *pdev = adapter->pdev; 1233 u32 ctrl_data = 0; 1234 1235 atl1c_stop_mac(hw); 1236 /* 1237 * Issue Soft Reset to the MAC. This will reset the chip's 1238 * transmit, receive, DMA. It will not effect 1239 * the current PCI configuration. The global reset bit is self- 1240 * clearing, and should clear within a microsecond. 1241 */ 1242 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1243 ctrl_data |= MASTER_CTRL_OOB_DIS; 1244 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1245 1246 AT_WRITE_FLUSH(hw); 1247 msleep(10); 1248 /* Wait at least 10ms for All module to be Idle */ 1249 1250 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1251 dev_err(&pdev->dev, 1252 "MAC state machine can't be idle since" 1253 " disabled for 10ms second\n"); 1254 return -1; 1255 } 1256 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1257 1258 /* driver control speed/duplex */ 1259 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1260 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1261 1262 /* clk switch setting */ 1263 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1264 switch (hw->nic_type) { 1265 case athr_l2c_b: 1266 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1267 SERDES_MAC_CLK_SLOWDOWN); 1268 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1269 break; 1270 case athr_l2c_b2: 1271 case athr_l1d_2: 1272 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1273 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1274 break; 1275 default: 1276 break; 1277 } 1278 1279 return 0; 1280 } 1281 1282 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1283 { 1284 u16 ctrl_flags = hw->ctrl_flags; 1285 1286 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1287 atl1c_set_aspm(hw, SPEED_0); 1288 hw->ctrl_flags = ctrl_flags; 1289 } 1290 1291 /* 1292 * Set ASPM state. 1293 * Enable/disable L0s/L1 depend on link state. 1294 */ 1295 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1296 { 1297 u32 pm_ctrl_data; 1298 u32 link_l1_timer; 1299 1300 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1301 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1302 PM_CTRL_ASPM_L0S_EN | 1303 PM_CTRL_MAC_ASPM_CHK); 1304 /* L1 timer */ 1305 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1306 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1307 link_l1_timer = 1308 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1309 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1310 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1311 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1312 } else { 1313 link_l1_timer = hw->nic_type == athr_l2c_b ? 1314 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1315 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1316 link_l1_timer = 1; 1317 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1318 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1319 } 1320 1321 /* L0S/L1 enable */ 1322 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1323 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1324 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1325 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1326 1327 /* l2cb & l1d & l2cb2 & l1d2 */ 1328 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1329 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1330 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1331 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1332 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1333 PM_CTRL_SERDES_PD_EX_L1 | 1334 PM_CTRL_CLK_SWH_L1; 1335 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1336 PM_CTRL_SERDES_PLL_L1_EN | 1337 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1338 PM_CTRL_SA_DLY_EN | 1339 PM_CTRL_HOTRST); 1340 /* disable l0s if link down or l2cb */ 1341 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1342 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1343 } else { /* l1c */ 1344 pm_ctrl_data = 1345 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1346 if (link_speed != SPEED_0) { 1347 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1348 PM_CTRL_SERDES_PLL_L1_EN | 1349 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1350 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1351 PM_CTRL_CLK_SWH_L1 | 1352 PM_CTRL_ASPM_L0S_EN | 1353 PM_CTRL_ASPM_L1_EN); 1354 } else { /* link down */ 1355 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1356 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1357 PM_CTRL_SERDES_PLL_L1_EN | 1358 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1359 PM_CTRL_ASPM_L0S_EN); 1360 } 1361 } 1362 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1363 1364 return; 1365 } 1366 1367 /** 1368 * atl1c_configure - Configure Transmit&Receive Unit after Reset 1369 * @adapter: board private structure 1370 * 1371 * Configure the Tx /Rx unit of the MAC after a reset. 1372 */ 1373 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1374 { 1375 struct atl1c_hw *hw = &adapter->hw; 1376 u32 master_ctrl_data = 0; 1377 u32 intr_modrt_data; 1378 u32 data; 1379 1380 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1381 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1382 MASTER_CTRL_RX_ITIMER_EN | 1383 MASTER_CTRL_INT_RDCLR); 1384 /* clear interrupt status */ 1385 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1386 /* Clear any WOL status */ 1387 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1388 /* set Interrupt Clear Timer 1389 * HW will enable self to assert interrupt event to system after 1390 * waiting x-time for software to notify it accept interrupt. 1391 */ 1392 1393 data = CLK_GATING_EN_ALL; 1394 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1395 if (hw->nic_type == athr_l2c_b) 1396 data &= ~CLK_GATING_RXMAC_EN; 1397 } else 1398 data = 0; 1399 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1400 1401 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1402 hw->ict & INT_RETRIG_TIMER_MASK); 1403 1404 atl1c_configure_des_ring(adapter); 1405 1406 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1407 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1408 IRQ_MODRT_TX_TIMER_SHIFT; 1409 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1410 IRQ_MODRT_RX_TIMER_SHIFT; 1411 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1412 master_ctrl_data |= 1413 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1414 } 1415 1416 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1417 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1418 1419 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1420 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1421 1422 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1423 hw->smb_timer & SMB_STAT_TIMER_MASK); 1424 1425 /* set MTU */ 1426 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1427 VLAN_HLEN + ETH_FCS_LEN); 1428 1429 atl1c_configure_tx(adapter); 1430 atl1c_configure_rx(adapter); 1431 atl1c_configure_dma(adapter); 1432 1433 return 0; 1434 } 1435 1436 static int atl1c_configure(struct atl1c_adapter *adapter) 1437 { 1438 struct net_device *netdev = adapter->netdev; 1439 int num; 1440 1441 atl1c_init_ring_ptrs(adapter); 1442 atl1c_set_multi(netdev); 1443 atl1c_restore_vlan(adapter); 1444 1445 num = atl1c_alloc_rx_buffer(adapter); 1446 if (unlikely(num == 0)) 1447 return -ENOMEM; 1448 1449 if (atl1c_configure_mac(adapter)) 1450 return -EIO; 1451 1452 return 0; 1453 } 1454 1455 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1456 { 1457 u16 hw_reg_addr = 0; 1458 unsigned long *stats_item = NULL; 1459 u32 data; 1460 1461 /* update rx status */ 1462 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1463 stats_item = &adapter->hw_stats.rx_ok; 1464 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1465 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1466 *stats_item += data; 1467 stats_item++; 1468 hw_reg_addr += 4; 1469 } 1470 /* update tx status */ 1471 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1472 stats_item = &adapter->hw_stats.tx_ok; 1473 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1474 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1475 *stats_item += data; 1476 stats_item++; 1477 hw_reg_addr += 4; 1478 } 1479 } 1480 1481 /** 1482 * atl1c_get_stats - Get System Network Statistics 1483 * @netdev: network interface device structure 1484 * 1485 * Returns the address of the device statistics structure. 1486 * The statistics are actually updated from the timer callback. 1487 */ 1488 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1489 { 1490 struct atl1c_adapter *adapter = netdev_priv(netdev); 1491 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1492 struct net_device_stats *net_stats = &netdev->stats; 1493 1494 atl1c_update_hw_stats(adapter); 1495 net_stats->rx_packets = hw_stats->rx_ok; 1496 net_stats->tx_packets = hw_stats->tx_ok; 1497 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1498 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1499 net_stats->multicast = hw_stats->rx_mcast; 1500 net_stats->collisions = hw_stats->tx_1_col + 1501 hw_stats->tx_2_col * 2 + 1502 hw_stats->tx_late_col + hw_stats->tx_abort_col; 1503 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err + 1504 hw_stats->rx_len_err + hw_stats->rx_sz_ov + 1505 hw_stats->rx_rrd_ov + hw_stats->rx_align_err; 1506 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1507 net_stats->rx_length_errors = hw_stats->rx_len_err; 1508 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1509 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1510 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; 1511 1512 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; 1513 1514 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col + 1515 hw_stats->tx_underrun + hw_stats->tx_trunc; 1516 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1517 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1518 net_stats->tx_window_errors = hw_stats->tx_late_col; 1519 1520 return net_stats; 1521 } 1522 1523 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1524 { 1525 u16 phy_data; 1526 1527 spin_lock(&adapter->mdio_lock); 1528 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1529 spin_unlock(&adapter->mdio_lock); 1530 } 1531 1532 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter, 1533 enum atl1c_trans_queue type) 1534 { 1535 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1536 struct atl1c_buffer *buffer_info; 1537 struct pci_dev *pdev = adapter->pdev; 1538 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1539 u16 hw_next_to_clean; 1540 u16 reg; 1541 1542 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX; 1543 1544 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean); 1545 1546 while (next_to_clean != hw_next_to_clean) { 1547 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1548 atl1c_clean_buffer(pdev, buffer_info, 1); 1549 if (++next_to_clean == tpd_ring->count) 1550 next_to_clean = 0; 1551 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1552 } 1553 1554 if (netif_queue_stopped(adapter->netdev) && 1555 netif_carrier_ok(adapter->netdev)) { 1556 netif_wake_queue(adapter->netdev); 1557 } 1558 1559 return true; 1560 } 1561 1562 /** 1563 * atl1c_intr - Interrupt Handler 1564 * @irq: interrupt number 1565 * @data: pointer to a network interface device structure 1566 */ 1567 static irqreturn_t atl1c_intr(int irq, void *data) 1568 { 1569 struct net_device *netdev = data; 1570 struct atl1c_adapter *adapter = netdev_priv(netdev); 1571 struct pci_dev *pdev = adapter->pdev; 1572 struct atl1c_hw *hw = &adapter->hw; 1573 int max_ints = AT_MAX_INT_WORK; 1574 int handled = IRQ_NONE; 1575 u32 status; 1576 u32 reg_data; 1577 1578 do { 1579 AT_READ_REG(hw, REG_ISR, ®_data); 1580 status = reg_data & hw->intr_mask; 1581 1582 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1583 if (max_ints != AT_MAX_INT_WORK) 1584 handled = IRQ_HANDLED; 1585 break; 1586 } 1587 /* link event */ 1588 if (status & ISR_GPHY) 1589 atl1c_clear_phy_int(adapter); 1590 /* Ack ISR */ 1591 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1592 if (status & ISR_RX_PKT) { 1593 if (likely(napi_schedule_prep(&adapter->napi))) { 1594 hw->intr_mask &= ~ISR_RX_PKT; 1595 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1596 __napi_schedule(&adapter->napi); 1597 } 1598 } 1599 if (status & ISR_TX_PKT) 1600 atl1c_clean_tx_irq(adapter, atl1c_trans_normal); 1601 1602 handled = IRQ_HANDLED; 1603 /* check if PCIE PHY Link down */ 1604 if (status & ISR_ERROR) { 1605 if (netif_msg_hw(adapter)) 1606 dev_err(&pdev->dev, 1607 "atl1c hardware error (status = 0x%x)\n", 1608 status & ISR_ERROR); 1609 /* reset MAC */ 1610 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1611 schedule_work(&adapter->common_task); 1612 return IRQ_HANDLED; 1613 } 1614 1615 if (status & ISR_OVER) 1616 if (netif_msg_intr(adapter)) 1617 dev_warn(&pdev->dev, 1618 "TX/RX overflow (status = 0x%x)\n", 1619 status & ISR_OVER); 1620 1621 /* link event */ 1622 if (status & (ISR_GPHY | ISR_MANUAL)) { 1623 netdev->stats.tx_carrier_errors++; 1624 atl1c_link_chg_event(adapter); 1625 break; 1626 } 1627 1628 } while (--max_ints > 0); 1629 /* re-enable Interrupt*/ 1630 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1631 return handled; 1632 } 1633 1634 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1635 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1636 { 1637 /* 1638 * The pid field in RRS in not correct sometimes, so we 1639 * cannot figure out if the packet is fragmented or not, 1640 * so we tell the KERNEL CHECKSUM_NONE 1641 */ 1642 skb_checksum_none_assert(skb); 1643 } 1644 1645 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter) 1646 { 1647 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1648 struct pci_dev *pdev = adapter->pdev; 1649 struct atl1c_buffer *buffer_info, *next_info; 1650 struct sk_buff *skb; 1651 void *vir_addr = NULL; 1652 u16 num_alloc = 0; 1653 u16 rfd_next_to_use, next_next; 1654 struct atl1c_rx_free_desc *rfd_desc; 1655 dma_addr_t mapping; 1656 1657 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1658 if (++next_next == rfd_ring->count) 1659 next_next = 0; 1660 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1661 next_info = &rfd_ring->buffer_info[next_next]; 1662 1663 while (next_info->flags & ATL1C_BUFFER_FREE) { 1664 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1665 1666 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len); 1667 if (unlikely(!skb)) { 1668 if (netif_msg_rx_err(adapter)) 1669 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1670 break; 1671 } 1672 1673 /* 1674 * Make buffer alignment 2 beyond a 16 byte boundary 1675 * this will result in a 16 byte aligned IP header after 1676 * the 14 byte MAC header is removed 1677 */ 1678 vir_addr = skb->data; 1679 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1680 buffer_info->skb = skb; 1681 buffer_info->length = adapter->rx_buffer_len; 1682 mapping = pci_map_single(pdev, vir_addr, 1683 buffer_info->length, 1684 PCI_DMA_FROMDEVICE); 1685 if (unlikely(pci_dma_mapping_error(pdev, mapping))) { 1686 dev_kfree_skb(skb); 1687 buffer_info->skb = NULL; 1688 buffer_info->length = 0; 1689 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1690 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1691 break; 1692 } 1693 buffer_info->dma = mapping; 1694 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1695 ATL1C_PCIMAP_FROMDEVICE); 1696 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1697 rfd_next_to_use = next_next; 1698 if (++next_next == rfd_ring->count) 1699 next_next = 0; 1700 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1701 next_info = &rfd_ring->buffer_info[next_next]; 1702 num_alloc++; 1703 } 1704 1705 if (num_alloc) { 1706 /* TODO: update mailbox here */ 1707 wmb(); 1708 rfd_ring->next_to_use = rfd_next_to_use; 1709 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1710 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1711 } 1712 1713 return num_alloc; 1714 } 1715 1716 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1717 struct atl1c_recv_ret_status *rrs, u16 num) 1718 { 1719 u16 i; 1720 /* the relationship between rrd and rfd is one map one */ 1721 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1722 rrd_ring->next_to_clean)) { 1723 rrs->word3 &= ~RRS_RXD_UPDATED; 1724 if (++rrd_ring->next_to_clean == rrd_ring->count) 1725 rrd_ring->next_to_clean = 0; 1726 } 1727 } 1728 1729 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1730 struct atl1c_recv_ret_status *rrs, u16 num) 1731 { 1732 u16 i; 1733 u16 rfd_index; 1734 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1735 1736 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1737 RRS_RX_RFD_INDEX_MASK; 1738 for (i = 0; i < num; i++) { 1739 buffer_info[rfd_index].skb = NULL; 1740 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1741 ATL1C_BUFFER_FREE); 1742 if (++rfd_index == rfd_ring->count) 1743 rfd_index = 0; 1744 } 1745 rfd_ring->next_to_clean = rfd_index; 1746 } 1747 1748 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1749 int *work_done, int work_to_do) 1750 { 1751 u16 rfd_num, rfd_index; 1752 u16 count = 0; 1753 u16 length; 1754 struct pci_dev *pdev = adapter->pdev; 1755 struct net_device *netdev = adapter->netdev; 1756 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1757 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1758 struct sk_buff *skb; 1759 struct atl1c_recv_ret_status *rrs; 1760 struct atl1c_buffer *buffer_info; 1761 1762 while (1) { 1763 if (*work_done >= work_to_do) 1764 break; 1765 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1766 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1767 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1768 RRS_RX_RFD_CNT_MASK; 1769 if (unlikely(rfd_num != 1)) 1770 /* TODO support mul rfd*/ 1771 if (netif_msg_rx_err(adapter)) 1772 dev_warn(&pdev->dev, 1773 "Multi rfd not support yet!\n"); 1774 goto rrs_checked; 1775 } else { 1776 break; 1777 } 1778 rrs_checked: 1779 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1780 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1781 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1782 if (netif_msg_rx_err(adapter)) 1783 dev_warn(&pdev->dev, 1784 "wrong packet! rrs word3 is %x\n", 1785 rrs->word3); 1786 continue; 1787 } 1788 1789 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1790 RRS_PKT_SIZE_MASK); 1791 /* Good Receive */ 1792 if (likely(rfd_num == 1)) { 1793 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1794 RRS_RX_RFD_INDEX_MASK; 1795 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1796 pci_unmap_single(pdev, buffer_info->dma, 1797 buffer_info->length, PCI_DMA_FROMDEVICE); 1798 skb = buffer_info->skb; 1799 } else { 1800 /* TODO */ 1801 if (netif_msg_rx_err(adapter)) 1802 dev_warn(&pdev->dev, 1803 "Multi rfd not support yet!\n"); 1804 break; 1805 } 1806 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1807 skb_put(skb, length - ETH_FCS_LEN); 1808 skb->protocol = eth_type_trans(skb, netdev); 1809 atl1c_rx_checksum(adapter, skb, rrs); 1810 if (rrs->word3 & RRS_VLAN_INS) { 1811 u16 vlan; 1812 1813 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1814 vlan = le16_to_cpu(vlan); 1815 __vlan_hwaccel_put_tag(skb, vlan); 1816 } 1817 netif_receive_skb(skb); 1818 1819 (*work_done)++; 1820 count++; 1821 } 1822 if (count) 1823 atl1c_alloc_rx_buffer(adapter); 1824 } 1825 1826 /** 1827 * atl1c_clean - NAPI Rx polling callback 1828 */ 1829 static int atl1c_clean(struct napi_struct *napi, int budget) 1830 { 1831 struct atl1c_adapter *adapter = 1832 container_of(napi, struct atl1c_adapter, napi); 1833 int work_done = 0; 1834 1835 /* Keep link state information with original netdev */ 1836 if (!netif_carrier_ok(adapter->netdev)) 1837 goto quit_polling; 1838 /* just enable one RXQ */ 1839 atl1c_clean_rx_irq(adapter, &work_done, budget); 1840 1841 if (work_done < budget) { 1842 quit_polling: 1843 napi_complete(napi); 1844 adapter->hw.intr_mask |= ISR_RX_PKT; 1845 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1846 } 1847 return work_done; 1848 } 1849 1850 #ifdef CONFIG_NET_POLL_CONTROLLER 1851 1852 /* 1853 * Polling 'interrupt' - used by things like netconsole to send skbs 1854 * without having to re-enable interrupts. It's not called while 1855 * the interrupt routine is executing. 1856 */ 1857 static void atl1c_netpoll(struct net_device *netdev) 1858 { 1859 struct atl1c_adapter *adapter = netdev_priv(netdev); 1860 1861 disable_irq(adapter->pdev->irq); 1862 atl1c_intr(adapter->pdev->irq, netdev); 1863 enable_irq(adapter->pdev->irq); 1864 } 1865 #endif 1866 1867 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1868 { 1869 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1870 u16 next_to_use = 0; 1871 u16 next_to_clean = 0; 1872 1873 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1874 next_to_use = tpd_ring->next_to_use; 1875 1876 return (u16)(next_to_clean > next_to_use) ? 1877 (next_to_clean - next_to_use - 1) : 1878 (tpd_ring->count + next_to_clean - next_to_use - 1); 1879 } 1880 1881 /* 1882 * get next usable tpd 1883 * Note: should call atl1c_tdp_avail to make sure 1884 * there is enough tpd to use 1885 */ 1886 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1887 enum atl1c_trans_queue type) 1888 { 1889 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1890 struct atl1c_tpd_desc *tpd_desc; 1891 u16 next_to_use = 0; 1892 1893 next_to_use = tpd_ring->next_to_use; 1894 if (++tpd_ring->next_to_use == tpd_ring->count) 1895 tpd_ring->next_to_use = 0; 1896 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1897 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1898 return tpd_desc; 1899 } 1900 1901 static struct atl1c_buffer * 1902 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1903 { 1904 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1905 1906 return &tpd_ring->buffer_info[tpd - 1907 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1908 } 1909 1910 /* Calculate the transmit packet descript needed*/ 1911 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1912 { 1913 u16 tpd_req; 1914 u16 proto_hdr_len = 0; 1915 1916 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1917 1918 if (skb_is_gso(skb)) { 1919 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1920 if (proto_hdr_len < skb_headlen(skb)) 1921 tpd_req++; 1922 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 1923 tpd_req++; 1924 } 1925 return tpd_req; 1926 } 1927 1928 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 1929 struct sk_buff *skb, 1930 struct atl1c_tpd_desc **tpd, 1931 enum atl1c_trans_queue type) 1932 { 1933 struct pci_dev *pdev = adapter->pdev; 1934 u8 hdr_len; 1935 u32 real_len; 1936 unsigned short offload_type; 1937 int err; 1938 1939 if (skb_is_gso(skb)) { 1940 if (skb_header_cloned(skb)) { 1941 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 1942 if (unlikely(err)) 1943 return -1; 1944 } 1945 offload_type = skb_shinfo(skb)->gso_type; 1946 1947 if (offload_type & SKB_GSO_TCPV4) { 1948 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 1949 + ntohs(ip_hdr(skb)->tot_len)); 1950 1951 if (real_len < skb->len) 1952 pskb_trim(skb, real_len); 1953 1954 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1955 if (unlikely(skb->len == hdr_len)) { 1956 /* only xsum need */ 1957 if (netif_msg_tx_queued(adapter)) 1958 dev_warn(&pdev->dev, 1959 "IPV4 tso with zero data??\n"); 1960 goto check_sum; 1961 } else { 1962 ip_hdr(skb)->check = 0; 1963 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 1964 ip_hdr(skb)->saddr, 1965 ip_hdr(skb)->daddr, 1966 0, IPPROTO_TCP, 0); 1967 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 1968 } 1969 } 1970 1971 if (offload_type & SKB_GSO_TCPV6) { 1972 struct atl1c_tpd_ext_desc *etpd = 1973 *(struct atl1c_tpd_ext_desc **)(tpd); 1974 1975 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 1976 *tpd = atl1c_get_tpd(adapter, type); 1977 ipv6_hdr(skb)->payload_len = 0; 1978 /* check payload == 0 byte ? */ 1979 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 1980 if (unlikely(skb->len == hdr_len)) { 1981 /* only xsum need */ 1982 if (netif_msg_tx_queued(adapter)) 1983 dev_warn(&pdev->dev, 1984 "IPV6 tso with zero data??\n"); 1985 goto check_sum; 1986 } else 1987 tcp_hdr(skb)->check = ~csum_ipv6_magic( 1988 &ipv6_hdr(skb)->saddr, 1989 &ipv6_hdr(skb)->daddr, 1990 0, IPPROTO_TCP, 0); 1991 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 1992 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 1993 etpd->pkt_len = cpu_to_le32(skb->len); 1994 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 1995 } 1996 1997 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 1998 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 1999 TPD_TCPHDR_OFFSET_SHIFT; 2000 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2001 TPD_MSS_SHIFT; 2002 return 0; 2003 } 2004 2005 check_sum: 2006 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2007 u8 css, cso; 2008 cso = skb_checksum_start_offset(skb); 2009 2010 if (unlikely(cso & 0x1)) { 2011 if (netif_msg_tx_err(adapter)) 2012 dev_err(&adapter->pdev->dev, 2013 "payload offset should not an event number\n"); 2014 return -1; 2015 } else { 2016 css = cso + skb->csum_offset; 2017 2018 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2019 TPD_PLOADOFFSET_SHIFT; 2020 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2021 TPD_CCSUM_OFFSET_SHIFT; 2022 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2023 } 2024 } 2025 return 0; 2026 } 2027 2028 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2029 struct atl1c_tpd_desc *first_tpd, 2030 enum atl1c_trans_queue type) 2031 { 2032 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2033 struct atl1c_buffer *buffer_info; 2034 struct atl1c_tpd_desc *tpd; 2035 u16 first_index, index; 2036 2037 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2038 index = first_index; 2039 while (index != tpd_ring->next_to_use) { 2040 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2041 buffer_info = &tpd_ring->buffer_info[index]; 2042 atl1c_clean_buffer(adpt->pdev, buffer_info, 0); 2043 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2044 if (++index == tpd_ring->count) 2045 index = 0; 2046 } 2047 tpd_ring->next_to_use = first_index; 2048 } 2049 2050 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2051 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2052 enum atl1c_trans_queue type) 2053 { 2054 struct atl1c_tpd_desc *use_tpd = NULL; 2055 struct atl1c_buffer *buffer_info = NULL; 2056 u16 buf_len = skb_headlen(skb); 2057 u16 map_len = 0; 2058 u16 mapped_len = 0; 2059 u16 hdr_len = 0; 2060 u16 nr_frags; 2061 u16 f; 2062 int tso; 2063 2064 nr_frags = skb_shinfo(skb)->nr_frags; 2065 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2066 if (tso) { 2067 /* TSO */ 2068 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2069 use_tpd = tpd; 2070 2071 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2072 buffer_info->length = map_len; 2073 buffer_info->dma = pci_map_single(adapter->pdev, 2074 skb->data, hdr_len, PCI_DMA_TODEVICE); 2075 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2076 buffer_info->dma))) 2077 goto err_dma; 2078 2079 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2080 ATL1C_PCIMAP_TODEVICE); 2081 mapped_len += map_len; 2082 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2083 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2084 } 2085 2086 if (mapped_len < buf_len) { 2087 /* mapped_len == 0, means we should use the first tpd, 2088 which is given by caller */ 2089 if (mapped_len == 0) 2090 use_tpd = tpd; 2091 else { 2092 use_tpd = atl1c_get_tpd(adapter, type); 2093 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2094 } 2095 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2096 buffer_info->length = buf_len - mapped_len; 2097 buffer_info->dma = 2098 pci_map_single(adapter->pdev, skb->data + mapped_len, 2099 buffer_info->length, PCI_DMA_TODEVICE); 2100 if (unlikely(pci_dma_mapping_error(adapter->pdev, 2101 buffer_info->dma))) 2102 goto err_dma; 2103 2104 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2105 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2106 ATL1C_PCIMAP_TODEVICE); 2107 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2108 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2109 } 2110 2111 for (f = 0; f < nr_frags; f++) { 2112 struct skb_frag_struct *frag; 2113 2114 frag = &skb_shinfo(skb)->frags[f]; 2115 2116 use_tpd = atl1c_get_tpd(adapter, type); 2117 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2118 2119 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2120 buffer_info->length = skb_frag_size(frag); 2121 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2122 frag, 0, 2123 buffer_info->length, 2124 DMA_TO_DEVICE); 2125 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2126 goto err_dma; 2127 2128 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2129 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2130 ATL1C_PCIMAP_TODEVICE); 2131 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2132 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2133 } 2134 2135 /* The last tpd */ 2136 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2137 /* The last buffer info contain the skb address, 2138 so it will be free after unmap */ 2139 buffer_info->skb = skb; 2140 2141 return 0; 2142 2143 err_dma: 2144 buffer_info->dma = 0; 2145 buffer_info->length = 0; 2146 return -1; 2147 } 2148 2149 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb, 2150 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type) 2151 { 2152 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2153 u16 reg; 2154 2155 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2156 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2157 } 2158 2159 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2160 struct net_device *netdev) 2161 { 2162 struct atl1c_adapter *adapter = netdev_priv(netdev); 2163 unsigned long flags; 2164 u16 tpd_req = 1; 2165 struct atl1c_tpd_desc *tpd; 2166 enum atl1c_trans_queue type = atl1c_trans_normal; 2167 2168 if (test_bit(__AT_DOWN, &adapter->flags)) { 2169 dev_kfree_skb_any(skb); 2170 return NETDEV_TX_OK; 2171 } 2172 2173 tpd_req = atl1c_cal_tpd_req(skb); 2174 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) { 2175 if (netif_msg_pktdata(adapter)) 2176 dev_info(&adapter->pdev->dev, "tx locked\n"); 2177 return NETDEV_TX_LOCKED; 2178 } 2179 2180 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2181 /* no enough descriptor, just stop queue */ 2182 netif_stop_queue(netdev); 2183 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2184 return NETDEV_TX_BUSY; 2185 } 2186 2187 tpd = atl1c_get_tpd(adapter, type); 2188 2189 /* do TSO and check sum */ 2190 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { 2191 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2192 dev_kfree_skb_any(skb); 2193 return NETDEV_TX_OK; 2194 } 2195 2196 if (unlikely(vlan_tx_tag_present(skb))) { 2197 u16 vlan = vlan_tx_tag_get(skb); 2198 __le16 tag; 2199 2200 vlan = cpu_to_le16(vlan); 2201 AT_VLAN_TO_TAG(vlan, tag); 2202 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT; 2203 tpd->vlan_tag = tag; 2204 } 2205 2206 if (skb_network_offset(skb) != ETH_HLEN) 2207 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */ 2208 2209 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2210 netif_info(adapter, tx_done, adapter->netdev, 2211 "tx-skb droppted due to dma error\n"); 2212 /* roll back tpd/buffer */ 2213 atl1c_tx_rollback(adapter, tpd, type); 2214 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2215 dev_kfree_skb(skb); 2216 } else { 2217 atl1c_tx_queue(adapter, skb, tpd, type); 2218 spin_unlock_irqrestore(&adapter->tx_lock, flags); 2219 } 2220 2221 return NETDEV_TX_OK; 2222 } 2223 2224 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2225 { 2226 struct net_device *netdev = adapter->netdev; 2227 2228 free_irq(adapter->pdev->irq, netdev); 2229 2230 if (adapter->have_msi) 2231 pci_disable_msi(adapter->pdev); 2232 } 2233 2234 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2235 { 2236 struct pci_dev *pdev = adapter->pdev; 2237 struct net_device *netdev = adapter->netdev; 2238 int flags = 0; 2239 int err = 0; 2240 2241 adapter->have_msi = true; 2242 err = pci_enable_msi(adapter->pdev); 2243 if (err) { 2244 if (netif_msg_ifup(adapter)) 2245 dev_err(&pdev->dev, 2246 "Unable to allocate MSI interrupt Error: %d\n", 2247 err); 2248 adapter->have_msi = false; 2249 } 2250 2251 if (!adapter->have_msi) 2252 flags |= IRQF_SHARED; 2253 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2254 netdev->name, netdev); 2255 if (err) { 2256 if (netif_msg_ifup(adapter)) 2257 dev_err(&pdev->dev, 2258 "Unable to allocate interrupt Error: %d\n", 2259 err); 2260 if (adapter->have_msi) 2261 pci_disable_msi(adapter->pdev); 2262 return err; 2263 } 2264 if (netif_msg_ifup(adapter)) 2265 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2266 return err; 2267 } 2268 2269 2270 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2271 { 2272 /* release tx-pending skbs and reset tx/rx ring index */ 2273 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2274 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2275 atl1c_clean_rx_ring(adapter); 2276 } 2277 2278 static int atl1c_up(struct atl1c_adapter *adapter) 2279 { 2280 struct net_device *netdev = adapter->netdev; 2281 int err; 2282 2283 netif_carrier_off(netdev); 2284 2285 err = atl1c_configure(adapter); 2286 if (unlikely(err)) 2287 goto err_up; 2288 2289 err = atl1c_request_irq(adapter); 2290 if (unlikely(err)) 2291 goto err_up; 2292 2293 atl1c_check_link_status(adapter); 2294 clear_bit(__AT_DOWN, &adapter->flags); 2295 napi_enable(&adapter->napi); 2296 atl1c_irq_enable(adapter); 2297 netif_start_queue(netdev); 2298 return err; 2299 2300 err_up: 2301 atl1c_clean_rx_ring(adapter); 2302 return err; 2303 } 2304 2305 static void atl1c_down(struct atl1c_adapter *adapter) 2306 { 2307 struct net_device *netdev = adapter->netdev; 2308 2309 atl1c_del_timer(adapter); 2310 adapter->work_event = 0; /* clear all event */ 2311 /* signal that we're down so the interrupt handler does not 2312 * reschedule our watchdog timer */ 2313 set_bit(__AT_DOWN, &adapter->flags); 2314 netif_carrier_off(netdev); 2315 napi_disable(&adapter->napi); 2316 atl1c_irq_disable(adapter); 2317 atl1c_free_irq(adapter); 2318 /* disable ASPM if device inactive */ 2319 atl1c_disable_l0s_l1(&adapter->hw); 2320 /* reset MAC to disable all RX/TX */ 2321 atl1c_reset_mac(&adapter->hw); 2322 msleep(1); 2323 2324 adapter->link_speed = SPEED_0; 2325 adapter->link_duplex = -1; 2326 atl1c_reset_dma_ring(adapter); 2327 } 2328 2329 /** 2330 * atl1c_open - Called when a network interface is made active 2331 * @netdev: network interface device structure 2332 * 2333 * Returns 0 on success, negative value on failure 2334 * 2335 * The open entry point is called when a network interface is made 2336 * active by the system (IFF_UP). At this point all resources needed 2337 * for transmit and receive operations are allocated, the interrupt 2338 * handler is registered with the OS, the watchdog timer is started, 2339 * and the stack is notified that the interface is ready. 2340 */ 2341 static int atl1c_open(struct net_device *netdev) 2342 { 2343 struct atl1c_adapter *adapter = netdev_priv(netdev); 2344 int err; 2345 2346 /* disallow open during test */ 2347 if (test_bit(__AT_TESTING, &adapter->flags)) 2348 return -EBUSY; 2349 2350 /* allocate rx/tx dma buffer & descriptors */ 2351 err = atl1c_setup_ring_resources(adapter); 2352 if (unlikely(err)) 2353 return err; 2354 2355 err = atl1c_up(adapter); 2356 if (unlikely(err)) 2357 goto err_up; 2358 2359 return 0; 2360 2361 err_up: 2362 atl1c_free_irq(adapter); 2363 atl1c_free_ring_resources(adapter); 2364 atl1c_reset_mac(&adapter->hw); 2365 return err; 2366 } 2367 2368 /** 2369 * atl1c_close - Disables a network interface 2370 * @netdev: network interface device structure 2371 * 2372 * Returns 0, this is not allowed to fail 2373 * 2374 * The close entry point is called when an interface is de-activated 2375 * by the OS. The hardware is still under the drivers control, but 2376 * needs to be disabled. A global MAC reset is issued to stop the 2377 * hardware, and all transmit and receive resources are freed. 2378 */ 2379 static int atl1c_close(struct net_device *netdev) 2380 { 2381 struct atl1c_adapter *adapter = netdev_priv(netdev); 2382 2383 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2384 set_bit(__AT_DOWN, &adapter->flags); 2385 cancel_work_sync(&adapter->common_task); 2386 atl1c_down(adapter); 2387 atl1c_free_ring_resources(adapter); 2388 return 0; 2389 } 2390 2391 static int atl1c_suspend(struct device *dev) 2392 { 2393 struct pci_dev *pdev = to_pci_dev(dev); 2394 struct net_device *netdev = pci_get_drvdata(pdev); 2395 struct atl1c_adapter *adapter = netdev_priv(netdev); 2396 struct atl1c_hw *hw = &adapter->hw; 2397 u32 wufc = adapter->wol; 2398 2399 atl1c_disable_l0s_l1(hw); 2400 if (netif_running(netdev)) { 2401 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2402 atl1c_down(adapter); 2403 } 2404 netif_device_detach(netdev); 2405 2406 if (wufc) 2407 if (atl1c_phy_to_ps_link(hw) != 0) 2408 dev_dbg(&pdev->dev, "phy power saving failed"); 2409 2410 atl1c_power_saving(hw, wufc); 2411 2412 return 0; 2413 } 2414 2415 #ifdef CONFIG_PM_SLEEP 2416 static int atl1c_resume(struct device *dev) 2417 { 2418 struct pci_dev *pdev = to_pci_dev(dev); 2419 struct net_device *netdev = pci_get_drvdata(pdev); 2420 struct atl1c_adapter *adapter = netdev_priv(netdev); 2421 2422 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2423 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2424 2425 atl1c_phy_reset(&adapter->hw); 2426 atl1c_reset_mac(&adapter->hw); 2427 atl1c_phy_init(&adapter->hw); 2428 2429 #if 0 2430 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data); 2431 pm_data &= ~PM_CTRLSTAT_PME_EN; 2432 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data); 2433 #endif 2434 2435 netif_device_attach(netdev); 2436 if (netif_running(netdev)) 2437 atl1c_up(adapter); 2438 2439 return 0; 2440 } 2441 #endif 2442 2443 static void atl1c_shutdown(struct pci_dev *pdev) 2444 { 2445 struct net_device *netdev = pci_get_drvdata(pdev); 2446 struct atl1c_adapter *adapter = netdev_priv(netdev); 2447 2448 atl1c_suspend(&pdev->dev); 2449 pci_wake_from_d3(pdev, adapter->wol); 2450 pci_set_power_state(pdev, PCI_D3hot); 2451 } 2452 2453 static const struct net_device_ops atl1c_netdev_ops = { 2454 .ndo_open = atl1c_open, 2455 .ndo_stop = atl1c_close, 2456 .ndo_validate_addr = eth_validate_addr, 2457 .ndo_start_xmit = atl1c_xmit_frame, 2458 .ndo_set_mac_address = atl1c_set_mac_addr, 2459 .ndo_set_rx_mode = atl1c_set_multi, 2460 .ndo_change_mtu = atl1c_change_mtu, 2461 .ndo_fix_features = atl1c_fix_features, 2462 .ndo_set_features = atl1c_set_features, 2463 .ndo_do_ioctl = atl1c_ioctl, 2464 .ndo_tx_timeout = atl1c_tx_timeout, 2465 .ndo_get_stats = atl1c_get_stats, 2466 #ifdef CONFIG_NET_POLL_CONTROLLER 2467 .ndo_poll_controller = atl1c_netpoll, 2468 #endif 2469 }; 2470 2471 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2472 { 2473 SET_NETDEV_DEV(netdev, &pdev->dev); 2474 pci_set_drvdata(pdev, netdev); 2475 2476 netdev->netdev_ops = &atl1c_netdev_ops; 2477 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2478 atl1c_set_ethtool_ops(netdev); 2479 2480 /* TODO: add when ready */ 2481 netdev->hw_features = NETIF_F_SG | 2482 NETIF_F_HW_CSUM | 2483 NETIF_F_HW_VLAN_RX | 2484 NETIF_F_TSO | 2485 NETIF_F_TSO6; 2486 netdev->features = netdev->hw_features | 2487 NETIF_F_HW_VLAN_TX; 2488 return 0; 2489 } 2490 2491 /** 2492 * atl1c_probe - Device Initialization Routine 2493 * @pdev: PCI device information struct 2494 * @ent: entry in atl1c_pci_tbl 2495 * 2496 * Returns 0 on success, negative on failure 2497 * 2498 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2499 * The OS initialization, configuring of the adapter private structure, 2500 * and a hardware reset occur. 2501 */ 2502 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2503 { 2504 struct net_device *netdev; 2505 struct atl1c_adapter *adapter; 2506 static int cards_found; 2507 2508 int err = 0; 2509 2510 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2511 err = pci_enable_device_mem(pdev); 2512 if (err) { 2513 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2514 return err; 2515 } 2516 2517 /* 2518 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2519 * shared register for the high 32 bits, so only a single, aligned, 2520 * 4 GB physical address range can be used at a time. 2521 * 2522 * Supporting 64-bit DMA on this hardware is more trouble than it's 2523 * worth. It is far easier to limit to 32-bit DMA than update 2524 * various kernel subsystems to support the mechanics required by a 2525 * fixed-high-32-bit system. 2526 */ 2527 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || 2528 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) { 2529 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2530 goto err_dma; 2531 } 2532 2533 err = pci_request_regions(pdev, atl1c_driver_name); 2534 if (err) { 2535 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2536 goto err_pci_reg; 2537 } 2538 2539 pci_set_master(pdev); 2540 2541 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2542 if (netdev == NULL) { 2543 err = -ENOMEM; 2544 goto err_alloc_etherdev; 2545 } 2546 2547 err = atl1c_init_netdev(netdev, pdev); 2548 if (err) { 2549 dev_err(&pdev->dev, "init netdevice failed\n"); 2550 goto err_init_netdev; 2551 } 2552 adapter = netdev_priv(netdev); 2553 adapter->bd_number = cards_found; 2554 adapter->netdev = netdev; 2555 adapter->pdev = pdev; 2556 adapter->hw.adapter = adapter; 2557 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2558 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2559 if (!adapter->hw.hw_addr) { 2560 err = -EIO; 2561 dev_err(&pdev->dev, "cannot map device registers\n"); 2562 goto err_ioremap; 2563 } 2564 2565 /* init mii data */ 2566 adapter->mii.dev = netdev; 2567 adapter->mii.mdio_read = atl1c_mdio_read; 2568 adapter->mii.mdio_write = atl1c_mdio_write; 2569 adapter->mii.phy_id_mask = 0x1f; 2570 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2571 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2572 setup_timer(&adapter->phy_config_timer, atl1c_phy_config, 2573 (unsigned long)adapter); 2574 /* setup the private structure */ 2575 err = atl1c_sw_init(adapter); 2576 if (err) { 2577 dev_err(&pdev->dev, "net device private data init failed\n"); 2578 goto err_sw_init; 2579 } 2580 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2581 2582 /* Init GPHY as early as possible due to power saving issue */ 2583 atl1c_phy_reset(&adapter->hw); 2584 2585 err = atl1c_reset_mac(&adapter->hw); 2586 if (err) { 2587 err = -EIO; 2588 goto err_reset; 2589 } 2590 2591 /* reset the controller to 2592 * put the device in a known good starting state */ 2593 err = atl1c_phy_init(&adapter->hw); 2594 if (err) { 2595 err = -EIO; 2596 goto err_reset; 2597 } 2598 if (atl1c_read_mac_addr(&adapter->hw)) { 2599 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2600 netdev->addr_assign_type |= NET_ADDR_RANDOM; 2601 } 2602 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2603 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len); 2604 if (netif_msg_probe(adapter)) 2605 dev_dbg(&pdev->dev, "mac address : %pM\n", 2606 adapter->hw.mac_addr); 2607 2608 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2609 INIT_WORK(&adapter->common_task, atl1c_common_task); 2610 adapter->work_event = 0; 2611 err = register_netdev(netdev); 2612 if (err) { 2613 dev_err(&pdev->dev, "register netdevice failed\n"); 2614 goto err_register; 2615 } 2616 2617 if (netif_msg_probe(adapter)) 2618 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION); 2619 cards_found++; 2620 return 0; 2621 2622 err_reset: 2623 err_register: 2624 err_sw_init: 2625 iounmap(adapter->hw.hw_addr); 2626 err_init_netdev: 2627 err_ioremap: 2628 free_netdev(netdev); 2629 err_alloc_etherdev: 2630 pci_release_regions(pdev); 2631 err_pci_reg: 2632 err_dma: 2633 pci_disable_device(pdev); 2634 return err; 2635 } 2636 2637 /** 2638 * atl1c_remove - Device Removal Routine 2639 * @pdev: PCI device information struct 2640 * 2641 * atl1c_remove is called by the PCI subsystem to alert the driver 2642 * that it should release a PCI device. The could be caused by a 2643 * Hot-Plug event, or because the driver is going to be removed from 2644 * memory. 2645 */ 2646 static void atl1c_remove(struct pci_dev *pdev) 2647 { 2648 struct net_device *netdev = pci_get_drvdata(pdev); 2649 struct atl1c_adapter *adapter = netdev_priv(netdev); 2650 2651 unregister_netdev(netdev); 2652 /* restore permanent address */ 2653 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2654 atl1c_phy_disable(&adapter->hw); 2655 2656 iounmap(adapter->hw.hw_addr); 2657 2658 pci_release_regions(pdev); 2659 pci_disable_device(pdev); 2660 free_netdev(netdev); 2661 } 2662 2663 /** 2664 * atl1c_io_error_detected - called when PCI error is detected 2665 * @pdev: Pointer to PCI device 2666 * @state: The current pci connection state 2667 * 2668 * This function is called after a PCI bus error affecting 2669 * this device has been detected. 2670 */ 2671 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2672 pci_channel_state_t state) 2673 { 2674 struct net_device *netdev = pci_get_drvdata(pdev); 2675 struct atl1c_adapter *adapter = netdev_priv(netdev); 2676 2677 netif_device_detach(netdev); 2678 2679 if (state == pci_channel_io_perm_failure) 2680 return PCI_ERS_RESULT_DISCONNECT; 2681 2682 if (netif_running(netdev)) 2683 atl1c_down(adapter); 2684 2685 pci_disable_device(pdev); 2686 2687 /* Request a slot slot reset. */ 2688 return PCI_ERS_RESULT_NEED_RESET; 2689 } 2690 2691 /** 2692 * atl1c_io_slot_reset - called after the pci bus has been reset. 2693 * @pdev: Pointer to PCI device 2694 * 2695 * Restart the card from scratch, as if from a cold-boot. Implementation 2696 * resembles the first-half of the e1000_resume routine. 2697 */ 2698 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2699 { 2700 struct net_device *netdev = pci_get_drvdata(pdev); 2701 struct atl1c_adapter *adapter = netdev_priv(netdev); 2702 2703 if (pci_enable_device(pdev)) { 2704 if (netif_msg_hw(adapter)) 2705 dev_err(&pdev->dev, 2706 "Cannot re-enable PCI device after reset\n"); 2707 return PCI_ERS_RESULT_DISCONNECT; 2708 } 2709 pci_set_master(pdev); 2710 2711 pci_enable_wake(pdev, PCI_D3hot, 0); 2712 pci_enable_wake(pdev, PCI_D3cold, 0); 2713 2714 atl1c_reset_mac(&adapter->hw); 2715 2716 return PCI_ERS_RESULT_RECOVERED; 2717 } 2718 2719 /** 2720 * atl1c_io_resume - called when traffic can start flowing again. 2721 * @pdev: Pointer to PCI device 2722 * 2723 * This callback is called when the error recovery driver tells us that 2724 * its OK to resume normal operation. Implementation resembles the 2725 * second-half of the atl1c_resume routine. 2726 */ 2727 static void atl1c_io_resume(struct pci_dev *pdev) 2728 { 2729 struct net_device *netdev = pci_get_drvdata(pdev); 2730 struct atl1c_adapter *adapter = netdev_priv(netdev); 2731 2732 if (netif_running(netdev)) { 2733 if (atl1c_up(adapter)) { 2734 if (netif_msg_hw(adapter)) 2735 dev_err(&pdev->dev, 2736 "Cannot bring device back up after reset\n"); 2737 return; 2738 } 2739 } 2740 2741 netif_device_attach(netdev); 2742 } 2743 2744 static const struct pci_error_handlers atl1c_err_handler = { 2745 .error_detected = atl1c_io_error_detected, 2746 .slot_reset = atl1c_io_slot_reset, 2747 .resume = atl1c_io_resume, 2748 }; 2749 2750 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2751 2752 static struct pci_driver atl1c_driver = { 2753 .name = atl1c_driver_name, 2754 .id_table = atl1c_pci_tbl, 2755 .probe = atl1c_probe, 2756 .remove = atl1c_remove, 2757 .shutdown = atl1c_shutdown, 2758 .err_handler = &atl1c_err_handler, 2759 .driver.pm = &atl1c_pm_ops, 2760 }; 2761 2762 /** 2763 * atl1c_init_module - Driver Registration Routine 2764 * 2765 * atl1c_init_module is the first routine called when the driver is 2766 * loaded. All it does is register with the PCI subsystem. 2767 */ 2768 static int __init atl1c_init_module(void) 2769 { 2770 return pci_register_driver(&atl1c_driver); 2771 } 2772 2773 /** 2774 * atl1c_exit_module - Driver Exit Cleanup Routine 2775 * 2776 * atl1c_exit_module is called just before the driver is removed 2777 * from memory. 2778 */ 2779 static void __exit atl1c_exit_module(void) 2780 { 2781 pci_unregister_driver(&atl1c_driver); 2782 } 2783 2784 module_init(atl1c_init_module); 2785 module_exit(atl1c_exit_module); 2786