tree-wide: fix assorted typos all over the place
[linux-2.6.git] / drivers / net / atl1c / atl1c_main.c
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 "1.0.0.1-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
29 /*
30  * atl1c_pci_tbl - PCI Device ID Table
31  *
32  * Wildcard entries (PCI_ANY_ID) should come last
33  * Last entry must be all 0s
34  *
35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
36  *   Class, Class Mask, private data (not used) }
37  */
38 static struct pci_device_id atl1c_pci_tbl[] = {
39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
41         /* required last entry */
42         { 0 }
43 };
44 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
45
46 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(ATL1C_DRV_VERSION);
50
51 static int atl1c_stop_mac(struct atl1c_hw *hw);
52 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
53 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
54 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
55 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
56 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
57 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
58                    int *work_done, int work_to_do);
59
60 static const u16 atl1c_pay_load_size[] = {
61         128, 256, 512, 1024, 2048, 4096,
62 };
63
64 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
65 {
66         REG_MB_RFD0_PROD_IDX,
67         REG_MB_RFD1_PROD_IDX,
68         REG_MB_RFD2_PROD_IDX,
69         REG_MB_RFD3_PROD_IDX
70 };
71
72 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
73 {
74         REG_RFD0_HEAD_ADDR_LO,
75         REG_RFD1_HEAD_ADDR_LO,
76         REG_RFD2_HEAD_ADDR_LO,
77         REG_RFD3_HEAD_ADDR_LO
78 };
79
80 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
81 {
82         REG_RRD0_HEAD_ADDR_LO,
83         REG_RRD1_HEAD_ADDR_LO,
84         REG_RRD2_HEAD_ADDR_LO,
85         REG_RRD3_HEAD_ADDR_LO
86 };
87
88 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
89         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
90
91 /*
92  * atl1c_init_pcie - init PCIE module
93  */
94 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
95 {
96         u32 data;
97         u32 pci_cmd;
98         struct pci_dev *pdev = hw->adapter->pdev;
99
100         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
101         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
102         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
103                 PCI_COMMAND_IO);
104         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
105
106         /*
107          * Clear any PowerSaveing Settings
108          */
109         pci_enable_wake(pdev, PCI_D3hot, 0);
110         pci_enable_wake(pdev, PCI_D3cold, 0);
111
112         /*
113          * Mask some pcie error bits
114          */
115         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
116         data &= ~PCIE_UC_SERVRITY_DLP;
117         data &= ~PCIE_UC_SERVRITY_FCP;
118         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
119
120         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
121                 atl1c_disable_l0s_l1(hw);
122         if (flag & ATL1C_PCIE_PHY_RESET)
123                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
124         else
125                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
126                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
127
128         msleep(1);
129 }
130
131 /*
132  * atl1c_irq_enable - Enable default interrupt generation settings
133  * @adapter: board private structure
134  */
135 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
136 {
137         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
138                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
139                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
140                 AT_WRITE_FLUSH(&adapter->hw);
141         }
142 }
143
144 /*
145  * atl1c_irq_disable - Mask off interrupt generation on the NIC
146  * @adapter: board private structure
147  */
148 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
149 {
150         atomic_inc(&adapter->irq_sem);
151         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
152         AT_WRITE_FLUSH(&adapter->hw);
153         synchronize_irq(adapter->pdev->irq);
154 }
155
156 /*
157  * atl1c_irq_reset - reset interrupt confiure on the NIC
158  * @adapter: board private structure
159  */
160 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
161 {
162         atomic_set(&adapter->irq_sem, 1);
163         atl1c_irq_enable(adapter);
164 }
165
166 /*
167  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
168  * of the idle status register until the device is actually idle
169  */
170 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
171 {
172         int timeout;
173         u32 data;
174
175         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
176                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
177                 if ((data & IDLE_STATUS_MASK) == 0)
178                         return 0;
179                 msleep(1);
180         }
181         return data;
182 }
183
184 /*
185  * atl1c_phy_config - Timer Call-back
186  * @data: pointer to netdev cast into an unsigned long
187  */
188 static void atl1c_phy_config(unsigned long data)
189 {
190         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
191         struct atl1c_hw *hw = &adapter->hw;
192         unsigned long flags;
193
194         spin_lock_irqsave(&adapter->mdio_lock, flags);
195         atl1c_restart_autoneg(hw);
196         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
197 }
198
199 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
200 {
201
202         WARN_ON(in_interrupt());
203         atl1c_down(adapter);
204         atl1c_up(adapter);
205         clear_bit(__AT_RESETTING, &adapter->flags);
206 }
207
208 static void atl1c_reset_task(struct work_struct *work)
209 {
210         struct atl1c_adapter *adapter;
211         struct net_device *netdev;
212
213         adapter = container_of(work, struct atl1c_adapter, reset_task);
214         netdev = adapter->netdev;
215
216         netif_device_detach(netdev);
217         atl1c_down(adapter);
218         atl1c_up(adapter);
219         netif_device_attach(netdev);
220 }
221
222 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
223 {
224         struct atl1c_hw *hw = &adapter->hw;
225         struct net_device *netdev = adapter->netdev;
226         struct pci_dev    *pdev   = adapter->pdev;
227         int err;
228         unsigned long flags;
229         u16 speed, duplex, phy_data;
230
231         spin_lock_irqsave(&adapter->mdio_lock, flags);
232         /* MII_BMSR must read twise */
233         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
234         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
236
237         if ((phy_data & BMSR_LSTATUS) == 0) {
238                 /* link down */
239                 if (netif_carrier_ok(netdev)) {
240                         hw->hibernate = true;
241                         if (atl1c_stop_mac(hw) != 0)
242                                 if (netif_msg_hw(adapter))
243                                         dev_warn(&pdev->dev,
244                                                 "stop mac failed\n");
245                         atl1c_set_aspm(hw, false);
246                 }
247                 netif_carrier_off(netdev);
248         } else {
249                 /* Link Up */
250                 hw->hibernate = false;
251                 spin_lock_irqsave(&adapter->mdio_lock, flags);
252                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
253                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
254                 if (unlikely(err))
255                         return;
256                 /* link result is our setting */
257                 if (adapter->link_speed != speed ||
258                     adapter->link_duplex != duplex) {
259                         adapter->link_speed  = speed;
260                         adapter->link_duplex = duplex;
261                         atl1c_set_aspm(hw, true);
262                         atl1c_enable_tx_ctrl(hw);
263                         atl1c_enable_rx_ctrl(hw);
264                         atl1c_setup_mac_ctrl(adapter);
265                         if (netif_msg_link(adapter))
266                                 dev_info(&pdev->dev,
267                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
268                                         atl1c_driver_name, netdev->name,
269                                         adapter->link_speed,
270                                         adapter->link_duplex == FULL_DUPLEX ?
271                                         "Full Duplex" : "Half Duplex");
272                 }
273                 if (!netif_carrier_ok(netdev))
274                         netif_carrier_on(netdev);
275         }
276 }
277
278 /*
279  * atl1c_link_chg_task - deal with link change event Out of interrupt context
280  * @netdev: network interface device structure
281  */
282 static void atl1c_link_chg_task(struct work_struct *work)
283 {
284         struct atl1c_adapter *adapter;
285
286         adapter = container_of(work, struct atl1c_adapter, link_chg_task);
287         atl1c_check_link_status(adapter);
288 }
289
290 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
291 {
292         struct net_device *netdev = adapter->netdev;
293         struct pci_dev    *pdev   = adapter->pdev;
294         u16 phy_data;
295         u16 link_up;
296
297         spin_lock(&adapter->mdio_lock);
298         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
299         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
300         spin_unlock(&adapter->mdio_lock);
301         link_up = phy_data & BMSR_LSTATUS;
302         /* notify upper layer link down ASAP */
303         if (!link_up) {
304                 if (netif_carrier_ok(netdev)) {
305                         /* old link state: Up */
306                         netif_carrier_off(netdev);
307                         if (netif_msg_link(adapter))
308                                 dev_info(&pdev->dev,
309                                         "%s: %s NIC Link is Down\n",
310                                         atl1c_driver_name, netdev->name);
311                         adapter->link_speed = SPEED_0;
312                 }
313         }
314         schedule_work(&adapter->link_chg_task);
315 }
316
317 static void atl1c_del_timer(struct atl1c_adapter *adapter)
318 {
319         del_timer_sync(&adapter->phy_config_timer);
320 }
321
322 static void atl1c_cancel_work(struct atl1c_adapter *adapter)
323 {
324         cancel_work_sync(&adapter->reset_task);
325         cancel_work_sync(&adapter->link_chg_task);
326 }
327
328 /*
329  * atl1c_tx_timeout - Respond to a Tx Hang
330  * @netdev: network interface device structure
331  */
332 static void atl1c_tx_timeout(struct net_device *netdev)
333 {
334         struct atl1c_adapter *adapter = netdev_priv(netdev);
335
336         /* Do the reset outside of interrupt context */
337         schedule_work(&adapter->reset_task);
338 }
339
340 /*
341  * atl1c_set_multi - Multicast and Promiscuous mode set
342  * @netdev: network interface device structure
343  *
344  * The set_multi entry point is called whenever the multicast address
345  * list or the network interface flags are updated.  This routine is
346  * responsible for configuring the hardware for proper multicast,
347  * promiscuous mode, and all-multi behavior.
348  */
349 static void atl1c_set_multi(struct net_device *netdev)
350 {
351         struct atl1c_adapter *adapter = netdev_priv(netdev);
352         struct atl1c_hw *hw = &adapter->hw;
353         struct dev_mc_list *mc_ptr;
354         u32 mac_ctrl_data;
355         u32 hash_value;
356
357         /* Check for Promiscuous and All Multicast modes */
358         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
359
360         if (netdev->flags & IFF_PROMISC) {
361                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
362         } else if (netdev->flags & IFF_ALLMULTI) {
363                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
364                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
365         } else {
366                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
367         }
368
369         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
370
371         /* clear the old settings from the multicast hash table */
372         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
373         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
374
375         /* comoute mc addresses' hash value ,and put it into hash table */
376         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
377                 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
378                 atl1c_hash_set(hw, hash_value);
379         }
380 }
381
382 static void atl1c_vlan_rx_register(struct net_device *netdev,
383                                    struct vlan_group *grp)
384 {
385         struct atl1c_adapter *adapter = netdev_priv(netdev);
386         struct pci_dev *pdev = adapter->pdev;
387         u32 mac_ctrl_data = 0;
388
389         if (netif_msg_pktdata(adapter))
390                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
391
392         atl1c_irq_disable(adapter);
393
394         adapter->vlgrp = grp;
395         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
396
397         if (grp) {
398                 /* enable VLAN tag insert/strip */
399                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
400         } else {
401                 /* disable VLAN tag insert/strip */
402                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
403         }
404
405         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
406         atl1c_irq_enable(adapter);
407 }
408
409 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
410 {
411         struct pci_dev *pdev = adapter->pdev;
412
413         if (netif_msg_pktdata(adapter))
414                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
415         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
416 }
417 /*
418  * atl1c_set_mac - Change the Ethernet Address of the NIC
419  * @netdev: network interface device structure
420  * @p: pointer to an address structure
421  *
422  * Returns 0 on success, negative on failure
423  */
424 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
425 {
426         struct atl1c_adapter *adapter = netdev_priv(netdev);
427         struct sockaddr *addr = p;
428
429         if (!is_valid_ether_addr(addr->sa_data))
430                 return -EADDRNOTAVAIL;
431
432         if (netif_running(netdev))
433                 return -EBUSY;
434
435         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
436         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
437
438         atl1c_hw_set_mac_addr(&adapter->hw);
439
440         return 0;
441 }
442
443 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
444                                 struct net_device *dev)
445 {
446         int mtu = dev->mtu;
447
448         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
449                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
450 }
451 /*
452  * atl1c_change_mtu - Change the Maximum Transfer Unit
453  * @netdev: network interface device structure
454  * @new_mtu: new value for maximum frame size
455  *
456  * Returns 0 on success, negative on failure
457  */
458 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
459 {
460         struct atl1c_adapter *adapter = netdev_priv(netdev);
461         int old_mtu   = netdev->mtu;
462         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
463
464         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
465                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
466                 if (netif_msg_link(adapter))
467                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
468                 return -EINVAL;
469         }
470         /* set MTU */
471         if (old_mtu != new_mtu && netif_running(netdev)) {
472                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
473                         msleep(1);
474                 netdev->mtu = new_mtu;
475                 adapter->hw.max_frame_size = new_mtu;
476                 atl1c_set_rxbufsize(adapter, netdev);
477                 atl1c_down(adapter);
478                 atl1c_up(adapter);
479                 clear_bit(__AT_RESETTING, &adapter->flags);
480                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
481                         u32 phy_data;
482
483                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
484                         phy_data |= 0x10000000;
485                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
486                 }
487
488         }
489         return 0;
490 }
491
492 /*
493  *  caller should hold mdio_lock
494  */
495 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
496 {
497         struct atl1c_adapter *adapter = netdev_priv(netdev);
498         u16 result;
499
500         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
501         return result;
502 }
503
504 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
505                              int reg_num, int val)
506 {
507         struct atl1c_adapter *adapter = netdev_priv(netdev);
508
509         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
510 }
511
512 /*
513  * atl1c_mii_ioctl -
514  * @netdev:
515  * @ifreq:
516  * @cmd:
517  */
518 static int atl1c_mii_ioctl(struct net_device *netdev,
519                            struct ifreq *ifr, int cmd)
520 {
521         struct atl1c_adapter *adapter = netdev_priv(netdev);
522         struct pci_dev *pdev = adapter->pdev;
523         struct mii_ioctl_data *data = if_mii(ifr);
524         unsigned long flags;
525         int retval = 0;
526
527         if (!netif_running(netdev))
528                 return -EINVAL;
529
530         spin_lock_irqsave(&adapter->mdio_lock, flags);
531         switch (cmd) {
532         case SIOCGMIIPHY:
533                 data->phy_id = 0;
534                 break;
535
536         case SIOCGMIIREG:
537                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
538                                     &data->val_out)) {
539                         retval = -EIO;
540                         goto out;
541                 }
542                 break;
543
544         case SIOCSMIIREG:
545                 if (data->reg_num & ~(0x1F)) {
546                         retval = -EFAULT;
547                         goto out;
548                 }
549
550                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
551                                 data->reg_num, data->val_in);
552                 if (atl1c_write_phy_reg(&adapter->hw,
553                                      data->reg_num, data->val_in)) {
554                         retval = -EIO;
555                         goto out;
556                 }
557                 break;
558
559         default:
560                 retval = -EOPNOTSUPP;
561                 break;
562         }
563 out:
564         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
565         return retval;
566 }
567
568 /*
569  * atl1c_ioctl -
570  * @netdev:
571  * @ifreq:
572  * @cmd:
573  */
574 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
575 {
576         switch (cmd) {
577         case SIOCGMIIPHY:
578         case SIOCGMIIREG:
579         case SIOCSMIIREG:
580                 return atl1c_mii_ioctl(netdev, ifr, cmd);
581         default:
582                 return -EOPNOTSUPP;
583         }
584 }
585
586 /*
587  * atl1c_alloc_queues - Allocate memory for all rings
588  * @adapter: board private structure to initialize
589  *
590  */
591 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
592 {
593         return 0;
594 }
595
596 static void atl1c_set_mac_type(struct atl1c_hw *hw)
597 {
598         switch (hw->device_id) {
599         case PCI_DEVICE_ID_ATTANSIC_L2C:
600                 hw->nic_type = athr_l2c;
601                 break;
602
603         case PCI_DEVICE_ID_ATTANSIC_L1C:
604                 hw->nic_type = athr_l1c;
605                 break;
606
607         default:
608                 break;
609         }
610 }
611
612 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
613 {
614         u32 phy_status_data;
615         u32 link_ctrl_data;
616
617         atl1c_set_mac_type(hw);
618         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
619         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
620
621         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
622                          ATL1C_INTR_MODRT_ENABLE  |
623                          ATL1C_RX_IPV6_CHKSUM     |
624                          ATL1C_TXQ_MODE_ENHANCE;
625         if (link_ctrl_data & LINK_CTRL_L0S_EN)
626                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
627         if (link_ctrl_data & LINK_CTRL_L1_EN)
628                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
629
630         if (hw->nic_type == athr_l1c) {
631                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
632                 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
633         }
634         return 0;
635 }
636 /*
637  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
638  * @adapter: board private structure to initialize
639  *
640  * atl1c_sw_init initializes the Adapter private data structure.
641  * Fields are initialized based on PCI device information and
642  * OS network device settings (MTU size).
643  */
644 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
645 {
646         struct atl1c_hw *hw   = &adapter->hw;
647         struct pci_dev  *pdev = adapter->pdev;
648
649         adapter->wol = 0;
650         adapter->link_speed = SPEED_0;
651         adapter->link_duplex = FULL_DUPLEX;
652         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
653         adapter->tpd_ring[0].count = 1024;
654         adapter->rfd_ring[0].count = 512;
655
656         hw->vendor_id = pdev->vendor;
657         hw->device_id = pdev->device;
658         hw->subsystem_vendor_id = pdev->subsystem_vendor;
659         hw->subsystem_id = pdev->subsystem_device;
660
661         /* before link up, we assume hibernate is true */
662         hw->hibernate = true;
663         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
664         if (atl1c_setup_mac_funcs(hw) != 0) {
665                 dev_err(&pdev->dev, "set mac function pointers failed\n");
666                 return -1;
667         }
668         hw->intr_mask = IMR_NORMAL_MASK;
669         hw->phy_configured = false;
670         hw->preamble_len = 7;
671         hw->max_frame_size = adapter->netdev->mtu;
672         if (adapter->num_rx_queues < 2) {
673                 hw->rss_type = atl1c_rss_disable;
674                 hw->rss_mode = atl1c_rss_mode_disable;
675         } else {
676                 hw->rss_type = atl1c_rss_ipv4;
677                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
678                 hw->rss_hash_bits = 16;
679         }
680         hw->autoneg_advertised = ADVERTISED_Autoneg;
681         hw->indirect_tab = 0xE4E4E4E4;
682         hw->base_cpu = 0;
683
684         hw->ict = 50000;                /* 100ms */
685         hw->smb_timer = 200000;         /* 400ms */
686         hw->cmb_tpd = 4;
687         hw->cmb_tx_timer = 1;           /* 2 us  */
688         hw->rx_imt = 200;
689         hw->tx_imt = 1000;
690
691         hw->tpd_burst = 5;
692         hw->rfd_burst = 8;
693         hw->dma_order = atl1c_dma_ord_out;
694         hw->dmar_block = atl1c_dma_req_1024;
695         hw->dmaw_block = atl1c_dma_req_1024;
696         hw->dmar_dly_cnt = 15;
697         hw->dmaw_dly_cnt = 4;
698
699         if (atl1c_alloc_queues(adapter)) {
700                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
701                 return -ENOMEM;
702         }
703         /* TODO */
704         atl1c_set_rxbufsize(adapter, adapter->netdev);
705         atomic_set(&adapter->irq_sem, 1);
706         spin_lock_init(&adapter->mdio_lock);
707         spin_lock_init(&adapter->tx_lock);
708         set_bit(__AT_DOWN, &adapter->flags);
709
710         return 0;
711 }
712
713 /*
714  * atl1c_clean_tx_ring - Free Tx-skb
715  * @adapter: board private structure
716  */
717 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
718                                 enum atl1c_trans_queue type)
719 {
720         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
721         struct atl1c_buffer *buffer_info;
722         struct pci_dev *pdev = adapter->pdev;
723         u16 index, ring_count;
724
725         ring_count = tpd_ring->count;
726         for (index = 0; index < ring_count; index++) {
727                 buffer_info = &tpd_ring->buffer_info[index];
728                 if (buffer_info->state == ATL1_BUFFER_FREE)
729                         continue;
730                 if (buffer_info->dma)
731                         pci_unmap_single(pdev, buffer_info->dma,
732                                         buffer_info->length,
733                                         PCI_DMA_TODEVICE);
734                 if (buffer_info->skb)
735                         dev_kfree_skb(buffer_info->skb);
736                 buffer_info->dma = 0;
737                 buffer_info->skb = NULL;
738                 buffer_info->state = ATL1_BUFFER_FREE;
739         }
740
741         /* Zero out Tx-buffers */
742         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
743                                 ring_count);
744         atomic_set(&tpd_ring->next_to_clean, 0);
745         tpd_ring->next_to_use = 0;
746 }
747
748 /*
749  * atl1c_clean_rx_ring - Free rx-reservation skbs
750  * @adapter: board private structure
751  */
752 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
753 {
754         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
755         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
756         struct atl1c_buffer *buffer_info;
757         struct pci_dev *pdev = adapter->pdev;
758         int i, j;
759
760         for (i = 0; i < adapter->num_rx_queues; i++) {
761                 for (j = 0; j < rfd_ring[i].count; j++) {
762                         buffer_info = &rfd_ring[i].buffer_info[j];
763                         if (buffer_info->state == ATL1_BUFFER_FREE)
764                                 continue;
765                         if (buffer_info->dma)
766                                 pci_unmap_single(pdev, buffer_info->dma,
767                                                 buffer_info->length,
768                                                 PCI_DMA_FROMDEVICE);
769                         if (buffer_info->skb)
770                                 dev_kfree_skb(buffer_info->skb);
771                         buffer_info->state = ATL1_BUFFER_FREE;
772                         buffer_info->skb = NULL;
773                 }
774                 /* zero out the descriptor ring */
775                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
776                 rfd_ring[i].next_to_clean = 0;
777                 rfd_ring[i].next_to_use = 0;
778                 rrd_ring[i].next_to_use = 0;
779                 rrd_ring[i].next_to_clean = 0;
780         }
781 }
782
783 /*
784  * Read / Write Ptr Initialize:
785  */
786 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
787 {
788         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
789         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
790         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
791         struct atl1c_buffer *buffer_info;
792         int i, j;
793
794         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
795                 tpd_ring[i].next_to_use = 0;
796                 atomic_set(&tpd_ring[i].next_to_clean, 0);
797                 buffer_info = tpd_ring[i].buffer_info;
798                 for (j = 0; j < tpd_ring->count; j++)
799                         buffer_info[i].state = ATL1_BUFFER_FREE;
800         }
801         for (i = 0; i < adapter->num_rx_queues; i++) {
802                 rfd_ring[i].next_to_use = 0;
803                 rfd_ring[i].next_to_clean = 0;
804                 rrd_ring[i].next_to_use = 0;
805                 rrd_ring[i].next_to_clean = 0;
806                 for (j = 0; j < rfd_ring[i].count; j++) {
807                         buffer_info = &rfd_ring[i].buffer_info[j];
808                         buffer_info->state = ATL1_BUFFER_FREE;
809                 }
810         }
811 }
812
813 /*
814  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
815  * @adapter: board private structure
816  *
817  * Free all transmit software resources
818  */
819 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
820 {
821         struct pci_dev *pdev = adapter->pdev;
822
823         pci_free_consistent(pdev, adapter->ring_header.size,
824                                         adapter->ring_header.desc,
825                                         adapter->ring_header.dma);
826         adapter->ring_header.desc = NULL;
827
828         /* Note: just free tdp_ring.buffer_info,
829         *  it contain rfd_ring.buffer_info, do not double free */
830         if (adapter->tpd_ring[0].buffer_info) {
831                 kfree(adapter->tpd_ring[0].buffer_info);
832                 adapter->tpd_ring[0].buffer_info = NULL;
833         }
834 }
835
836 /*
837  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
838  * @adapter: board private structure
839  *
840  * Return 0 on success, negative on failure
841  */
842 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
843 {
844         struct pci_dev *pdev = adapter->pdev;
845         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
846         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
847         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
848         struct atl1c_ring_header *ring_header = &adapter->ring_header;
849         int num_rx_queues = adapter->num_rx_queues;
850         int size;
851         int i;
852         int count = 0;
853         int rx_desc_count = 0;
854         u32 offset = 0;
855
856         rrd_ring[0].count = rfd_ring[0].count;
857         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
858                 tpd_ring[i].count = tpd_ring[0].count;
859
860         for (i = 1; i < adapter->num_rx_queues; i++)
861                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
862
863         /* 2 tpd queue, one high priority queue,
864          * another normal priority queue */
865         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
866                 rfd_ring->count * num_rx_queues);
867         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
868         if (unlikely(!tpd_ring->buffer_info)) {
869                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
870                         size);
871                 goto err_nomem;
872         }
873         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
874                 tpd_ring[i].buffer_info =
875                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
876                 count += tpd_ring[i].count;
877         }
878
879         for (i = 0; i < num_rx_queues; i++) {
880                 rfd_ring[i].buffer_info =
881                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
882                 count += rfd_ring[i].count;
883                 rx_desc_count += rfd_ring[i].count;
884         }
885         /*
886          * real ring DMA buffer
887          * each ring/block may need up to 8 bytes for alignment, hence the
888          * additional bytes tacked onto the end.
889          */
890         ring_header->size = size =
891                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
892                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
893                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
894                 sizeof(struct atl1c_hw_stats) +
895                 8 * 4 + 8 * 2 * num_rx_queues;
896
897         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
898                                 &ring_header->dma);
899         if (unlikely(!ring_header->desc)) {
900                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
901                 goto err_nomem;
902         }
903         memset(ring_header->desc, 0, ring_header->size);
904         /* init TPD ring */
905
906         tpd_ring[0].dma = roundup(ring_header->dma, 8);
907         offset = tpd_ring[0].dma - ring_header->dma;
908         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
909                 tpd_ring[i].dma = ring_header->dma + offset;
910                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
911                 tpd_ring[i].size =
912                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
913                 offset += roundup(tpd_ring[i].size, 8);
914         }
915         /* init RFD ring */
916         for (i = 0; i < num_rx_queues; i++) {
917                 rfd_ring[i].dma = ring_header->dma + offset;
918                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
919                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
920                                 rfd_ring[i].count;
921                 offset += roundup(rfd_ring[i].size, 8);
922         }
923
924         /* init RRD ring */
925         for (i = 0; i < num_rx_queues; i++) {
926                 rrd_ring[i].dma = ring_header->dma + offset;
927                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
928                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
929                                 rrd_ring[i].count;
930                 offset += roundup(rrd_ring[i].size, 8);
931         }
932
933         adapter->smb.dma = ring_header->dma + offset;
934         adapter->smb.smb = (u8 *)ring_header->desc + offset;
935         return 0;
936
937 err_nomem:
938         kfree(tpd_ring->buffer_info);
939         return -ENOMEM;
940 }
941
942 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
943 {
944         struct atl1c_hw *hw = &adapter->hw;
945         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
946                                 adapter->rfd_ring;
947         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
948                                 adapter->rrd_ring;
949         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
950                                 adapter->tpd_ring;
951         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
952         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
953         int i;
954
955         /* TPD */
956         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
957                         (u32)((tpd_ring[atl1c_trans_normal].dma &
958                                 AT_DMA_HI_ADDR_MASK) >> 32));
959         /* just enable normal priority TX queue */
960         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
961                         (u32)(tpd_ring[atl1c_trans_normal].dma &
962                                 AT_DMA_LO_ADDR_MASK));
963         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
964                         (u32)(tpd_ring[atl1c_trans_high].dma &
965                                 AT_DMA_LO_ADDR_MASK));
966         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
967                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
968
969
970         /* RFD */
971         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
972                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
973         for (i = 0; i < adapter->num_rx_queues; i++)
974                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
975                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
976
977         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
978                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
979         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
980                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
981
982         /* RRD */
983         for (i = 0; i < adapter->num_rx_queues; i++)
984                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
985                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
986         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
987                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
988
989         /* CMB */
990         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
991
992         /* SMB */
993         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
994                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
995         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
996                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
997         /* Load all of base address above */
998         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
999 }
1000
1001 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1002 {
1003         struct atl1c_hw *hw = &adapter->hw;
1004         u32 dev_ctrl_data;
1005         u32 max_pay_load;
1006         u16 tx_offload_thresh;
1007         u32 txq_ctrl_data;
1008         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1009
1010         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1011         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1012         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1013                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1014         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1015         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1016                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1017         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1018         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1019                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1020         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1021
1022         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1023                         TXQ_NUM_TPD_BURST_SHIFT;
1024         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1025                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1026         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1027                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1028
1029         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1030 }
1031
1032 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1033 {
1034         struct atl1c_hw *hw = &adapter->hw;
1035         u32 rxq_ctrl_data;
1036
1037         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1038                         RXQ_RFD_BURST_NUM_SHIFT;
1039
1040         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1041                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1042         if (hw->rss_type == atl1c_rss_ipv4)
1043                 rxq_ctrl_data |= RSS_HASH_IPV4;
1044         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1045                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1046         if (hw->rss_type == atl1c_rss_ipv6)
1047                 rxq_ctrl_data |= RSS_HASH_IPV6;
1048         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1049                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1050         if (hw->rss_type != atl1c_rss_disable)
1051                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1052
1053         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1054                         RSS_MODE_SHIFT;
1055         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1056                         RSS_HASH_BITS_SHIFT;
1057         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1058                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1059                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1060
1061         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1062 }
1063
1064 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1065 {
1066         struct atl1c_hw *hw = &adapter->hw;
1067
1068         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1069         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1070 }
1071
1072 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1073 {
1074         struct atl1c_hw *hw = &adapter->hw;
1075         u32 dma_ctrl_data;
1076
1077         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1078         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1079                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1080         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1081                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1082         else
1083                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1084
1085         switch (hw->dma_order) {
1086         case atl1c_dma_ord_in:
1087                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1088                 break;
1089         case atl1c_dma_ord_enh:
1090                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1091                 break;
1092         case atl1c_dma_ord_out:
1093                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1094                 break;
1095         default:
1096                 break;
1097         }
1098
1099         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1100                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1101         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1102                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1103         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1104                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1105         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1106                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1107
1108         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1109 }
1110
1111 /*
1112  * Stop the mac, transmit and receive units
1113  * hw - Struct containing variables accessed by shared code
1114  * return : 0  or  idle status (if error)
1115  */
1116 static int atl1c_stop_mac(struct atl1c_hw *hw)
1117 {
1118         u32 data;
1119
1120         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1121         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1122                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1123         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1124
1125         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1126         data &= ~TXQ_CTRL_EN;
1127         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1128
1129         atl1c_wait_until_idle(hw);
1130
1131         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1132         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1133         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1134
1135         return (int)atl1c_wait_until_idle(hw);
1136 }
1137
1138 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1139 {
1140         u32 data;
1141
1142         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1143         switch (hw->adapter->num_rx_queues) {
1144         case 4:
1145                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1146                 break;
1147         case 3:
1148                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1149                 break;
1150         case 2:
1151                 data |= RXQ1_CTRL_EN;
1152                 break;
1153         default:
1154                 break;
1155         }
1156         data |= RXQ_CTRL_EN;
1157         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1158 }
1159
1160 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1161 {
1162         u32 data;
1163
1164         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1165         data |= TXQ_CTRL_EN;
1166         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1167 }
1168
1169 /*
1170  * Reset the transmit and receive units; mask and clear all interrupts.
1171  * hw - Struct containing variables accessed by shared code
1172  * return : 0  or  idle status (if error)
1173  */
1174 static int atl1c_reset_mac(struct atl1c_hw *hw)
1175 {
1176         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1177         struct pci_dev *pdev = adapter->pdev;
1178         int ret;
1179
1180         AT_WRITE_REG(hw, REG_IMR, 0);
1181         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1182
1183         ret = atl1c_stop_mac(hw);
1184         if (ret)
1185                 return ret;
1186         /*
1187          * Issue Soft Reset to the MAC.  This will reset the chip's
1188          * transmit, receive, DMA.  It will not effect
1189          * the current PCI configuration.  The global reset bit is self-
1190          * clearing, and should clear within a microsecond.
1191          */
1192         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1193         AT_WRITE_FLUSH(hw);
1194         msleep(10);
1195         /* Wait at least 10ms for All module to be Idle */
1196
1197         if (atl1c_wait_until_idle(hw)) {
1198                 dev_err(&pdev->dev,
1199                         "MAC state machine can't be idle since"
1200                         " disabled for 10ms second\n");
1201                 return -1;
1202         }
1203         return 0;
1204 }
1205
1206 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1207 {
1208         u32 pm_ctrl_data;
1209
1210         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1211         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1212                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1213         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1214         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1215         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1216         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1217         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1218
1219         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1220         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1221         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1222         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1223 }
1224
1225 /*
1226  * Set ASPM state.
1227  * Enable/disable L0s/L1 depend on link state.
1228  */
1229 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1230 {
1231         u32 pm_ctrl_data;
1232
1233         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1234
1235         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1236         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1237                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1238
1239         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1240
1241         if (linkup) {
1242                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1243                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1244
1245                 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1246                 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1247         } else {
1248                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1249                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1250                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1251                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1252
1253                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1254
1255                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1256                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1257                 else
1258                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1259         }
1260
1261         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1262 }
1263
1264 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1265 {
1266         struct atl1c_hw *hw = &adapter->hw;
1267         struct net_device *netdev = adapter->netdev;
1268         u32 mac_ctrl_data;
1269
1270         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1271         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1272
1273         if (adapter->link_duplex == FULL_DUPLEX) {
1274                 hw->mac_duplex = true;
1275                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1276         }
1277
1278         if (adapter->link_speed == SPEED_1000)
1279                 hw->mac_speed = atl1c_mac_speed_1000;
1280         else
1281                 hw->mac_speed = atl1c_mac_speed_10_100;
1282
1283         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1284                         MAC_CTRL_SPEED_SHIFT;
1285
1286         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1287         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1288                         MAC_CTRL_PRMLEN_SHIFT);
1289
1290         if (adapter->vlgrp)
1291                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1292
1293         mac_ctrl_data |= MAC_CTRL_BC_EN;
1294         if (netdev->flags & IFF_PROMISC)
1295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1296         if (netdev->flags & IFF_ALLMULTI)
1297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1298
1299         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1300         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1301 }
1302
1303 /*
1304  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1305  * @adapter: board private structure
1306  *
1307  * Configure the Tx /Rx unit of the MAC after a reset.
1308  */
1309 static int atl1c_configure(struct atl1c_adapter *adapter)
1310 {
1311         struct atl1c_hw *hw = &adapter->hw;
1312         u32 master_ctrl_data = 0;
1313         u32 intr_modrt_data;
1314
1315         /* clear interrupt status */
1316         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1317         /*  Clear any WOL status */
1318         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1319         /* set Interrupt Clear Timer
1320          * HW will enable self to assert interrupt event to system after
1321          * waiting x-time for software to notify it accept interrupt.
1322          */
1323         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1324                 hw->ict & INT_RETRIG_TIMER_MASK);
1325
1326         atl1c_configure_des_ring(adapter);
1327
1328         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1329                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1330                                         IRQ_MODRT_TX_TIMER_SHIFT;
1331                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1332                                         IRQ_MODRT_RX_TIMER_SHIFT;
1333                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1334                 master_ctrl_data |=
1335                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1336         }
1337
1338         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1339                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1340
1341         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1342
1343         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1344                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1345                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1346                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1347                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1348         }
1349
1350         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1351                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1352                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1353         /* set MTU */
1354         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1355                         VLAN_HLEN + ETH_FCS_LEN);
1356         /* HDS, disable */
1357         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1358
1359         atl1c_configure_tx(adapter);
1360         atl1c_configure_rx(adapter);
1361         atl1c_configure_rss(adapter);
1362         atl1c_configure_dma(adapter);
1363
1364         return 0;
1365 }
1366
1367 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1368 {
1369         u16 hw_reg_addr = 0;
1370         unsigned long *stats_item = NULL;
1371         u32 data;
1372
1373         /* update rx status */
1374         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1375         stats_item  = &adapter->hw_stats.rx_ok;
1376         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1377                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1378                 *stats_item += data;
1379                 stats_item++;
1380                 hw_reg_addr += 4;
1381         }
1382 /* update tx status */
1383         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1384         stats_item  = &adapter->hw_stats.tx_ok;
1385         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1386                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1387                 *stats_item += data;
1388                 stats_item++;
1389                 hw_reg_addr += 4;
1390         }
1391 }
1392
1393 /*
1394  * atl1c_get_stats - Get System Network Statistics
1395  * @netdev: network interface device structure
1396  *
1397  * Returns the address of the device statistics structure.
1398  * The statistics are actually updated from the timer callback.
1399  */
1400 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1401 {
1402         struct atl1c_adapter *adapter = netdev_priv(netdev);
1403         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1404         struct net_device_stats *net_stats = &adapter->net_stats;
1405
1406         atl1c_update_hw_stats(adapter);
1407         net_stats->rx_packets = hw_stats->rx_ok;
1408         net_stats->tx_packets = hw_stats->tx_ok;
1409         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1410         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1411         net_stats->multicast  = hw_stats->rx_mcast;
1412         net_stats->collisions = hw_stats->tx_1_col +
1413                                 hw_stats->tx_2_col * 2 +
1414                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1415         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1416                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1417                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1418         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1419         net_stats->rx_length_errors = hw_stats->rx_len_err;
1420         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1421         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1422         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1423
1424         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1425
1426         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1427                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1428         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1429         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1430         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1431
1432         return &adapter->net_stats;
1433 }
1434
1435 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1436 {
1437         u16 phy_data;
1438
1439         spin_lock(&adapter->mdio_lock);
1440         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1441         spin_unlock(&adapter->mdio_lock);
1442 }
1443
1444 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1445                                 enum atl1c_trans_queue type)
1446 {
1447         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1448                                 &adapter->tpd_ring[type];
1449         struct atl1c_buffer *buffer_info;
1450         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1451         u16 hw_next_to_clean;
1452         u16 shift;
1453         u32 data;
1454
1455         if (type == atl1c_trans_high)
1456                 shift = MB_HTPD_CONS_IDX_SHIFT;
1457         else
1458                 shift = MB_NTPD_CONS_IDX_SHIFT;
1459
1460         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1461         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1462
1463         while (next_to_clean != hw_next_to_clean) {
1464                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1465                 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1466                         pci_unmap_page(adapter->pdev, buffer_info->dma,
1467                                         buffer_info->length, PCI_DMA_TODEVICE);
1468                         buffer_info->dma = 0;
1469                         if (buffer_info->skb) {
1470                                 dev_kfree_skb_irq(buffer_info->skb);
1471                                 buffer_info->skb = NULL;
1472                         }
1473                         buffer_info->state = ATL1_BUFFER_FREE;
1474                 }
1475                 if (++next_to_clean == tpd_ring->count)
1476                         next_to_clean = 0;
1477                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1478         }
1479
1480         if (netif_queue_stopped(adapter->netdev) &&
1481                         netif_carrier_ok(adapter->netdev)) {
1482                 netif_wake_queue(adapter->netdev);
1483         }
1484
1485         return true;
1486 }
1487
1488 /*
1489  * atl1c_intr - Interrupt Handler
1490  * @irq: interrupt number
1491  * @data: pointer to a network interface device structure
1492  * @pt_regs: CPU registers structure
1493  */
1494 static irqreturn_t atl1c_intr(int irq, void *data)
1495 {
1496         struct net_device *netdev  = data;
1497         struct atl1c_adapter *adapter = netdev_priv(netdev);
1498         struct pci_dev *pdev = adapter->pdev;
1499         struct atl1c_hw *hw = &adapter->hw;
1500         int max_ints = AT_MAX_INT_WORK;
1501         int handled = IRQ_NONE;
1502         u32 status;
1503         u32 reg_data;
1504
1505         do {
1506                 AT_READ_REG(hw, REG_ISR, &reg_data);
1507                 status = reg_data & hw->intr_mask;
1508
1509                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1510                         if (max_ints != AT_MAX_INT_WORK)
1511                                 handled = IRQ_HANDLED;
1512                         break;
1513                 }
1514                 /* link event */
1515                 if (status & ISR_GPHY)
1516                         atl1c_clear_phy_int(adapter);
1517                 /* Ack ISR */
1518                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1519                 if (status & ISR_RX_PKT) {
1520                         if (likely(napi_schedule_prep(&adapter->napi))) {
1521                                 hw->intr_mask &= ~ISR_RX_PKT;
1522                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1523                                 __napi_schedule(&adapter->napi);
1524                         }
1525                 }
1526                 if (status & ISR_TX_PKT)
1527                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1528
1529                 handled = IRQ_HANDLED;
1530                 /* check if PCIE PHY Link down */
1531                 if (status & ISR_ERROR) {
1532                         if (netif_msg_hw(adapter))
1533                                 dev_err(&pdev->dev,
1534                                         "atl1c hardware error (status = 0x%x)\n",
1535                                         status & ISR_ERROR);
1536                         /* reset MAC */
1537                         hw->intr_mask &= ~ISR_ERROR;
1538                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1539                         schedule_work(&adapter->reset_task);
1540                         break;
1541                 }
1542
1543                 if (status & ISR_OVER)
1544                         if (netif_msg_intr(adapter))
1545                                 dev_warn(&pdev->dev,
1546                                         "TX/RX overflow (status = 0x%x)\n",
1547                                         status & ISR_OVER);
1548
1549                 /* link event */
1550                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1551                         adapter->net_stats.tx_carrier_errors++;
1552                         atl1c_link_chg_event(adapter);
1553                         break;
1554                 }
1555
1556         } while (--max_ints > 0);
1557         /* re-enable Interrupt*/
1558         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1559         return handled;
1560 }
1561
1562 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1563                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1564 {
1565         /*
1566          * The pid field in RRS in not correct sometimes, so we
1567          * cannot figure out if the packet is fragmented or not,
1568          * so we tell the KERNEL CHECKSUM_NONE
1569          */
1570         skb->ip_summed = CHECKSUM_NONE;
1571 }
1572
1573 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1574 {
1575         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1576         struct pci_dev *pdev = adapter->pdev;
1577         struct atl1c_buffer *buffer_info, *next_info;
1578         struct sk_buff *skb;
1579         void *vir_addr = NULL;
1580         u16 num_alloc = 0;
1581         u16 rfd_next_to_use, next_next;
1582         struct atl1c_rx_free_desc *rfd_desc;
1583
1584         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1585         if (++next_next == rfd_ring->count)
1586                 next_next = 0;
1587         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1588         next_info = &rfd_ring->buffer_info[next_next];
1589
1590         while (next_info->state == ATL1_BUFFER_FREE) {
1591                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1592
1593                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1594                 if (unlikely(!skb)) {
1595                         if (netif_msg_rx_err(adapter))
1596                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1597                         break;
1598                 }
1599
1600                 /*
1601                  * Make buffer alignment 2 beyond a 16 byte boundary
1602                  * this will result in a 16 byte aligned IP header after
1603                  * the 14 byte MAC header is removed
1604                  */
1605                 vir_addr = skb->data;
1606                 buffer_info->state = ATL1_BUFFER_BUSY;
1607                 buffer_info->skb = skb;
1608                 buffer_info->length = adapter->rx_buffer_len;
1609                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1610                                                 buffer_info->length,
1611                                                 PCI_DMA_FROMDEVICE);
1612                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1613                 rfd_next_to_use = next_next;
1614                 if (++next_next == rfd_ring->count)
1615                         next_next = 0;
1616                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1617                 next_info = &rfd_ring->buffer_info[next_next];
1618                 num_alloc++;
1619         }
1620
1621         if (num_alloc) {
1622                 /* TODO: update mailbox here */
1623                 wmb();
1624                 rfd_ring->next_to_use = rfd_next_to_use;
1625                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1626                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1627         }
1628
1629         return num_alloc;
1630 }
1631
1632 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1633                         struct  atl1c_recv_ret_status *rrs, u16 num)
1634 {
1635         u16 i;
1636         /* the relationship between rrd and rfd is one map one */
1637         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1638                                         rrd_ring->next_to_clean)) {
1639                 rrs->word3 &= ~RRS_RXD_UPDATED;
1640                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1641                         rrd_ring->next_to_clean = 0;
1642         }
1643 }
1644
1645 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1646         struct atl1c_recv_ret_status *rrs, u16 num)
1647 {
1648         u16 i;
1649         u16 rfd_index;
1650         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1651
1652         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1653                         RRS_RX_RFD_INDEX_MASK;
1654         for (i = 0; i < num; i++) {
1655                 buffer_info[rfd_index].skb = NULL;
1656                 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1657                 if (++rfd_index == rfd_ring->count)
1658                         rfd_index = 0;
1659         }
1660         rfd_ring->next_to_clean = rfd_index;
1661 }
1662
1663 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1664                    int *work_done, int work_to_do)
1665 {
1666         u16 rfd_num, rfd_index;
1667         u16 count = 0;
1668         u16 length;
1669         struct pci_dev *pdev = adapter->pdev;
1670         struct net_device *netdev  = adapter->netdev;
1671         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1672         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1673         struct sk_buff *skb;
1674         struct atl1c_recv_ret_status *rrs;
1675         struct atl1c_buffer *buffer_info;
1676
1677         while (1) {
1678                 if (*work_done >= work_to_do)
1679                         break;
1680                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1681                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1682                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1683                                 RRS_RX_RFD_CNT_MASK;
1684                         if (unlikely(rfd_num != 1))
1685                                 /* TODO support mul rfd*/
1686                                 if (netif_msg_rx_err(adapter))
1687                                         dev_warn(&pdev->dev,
1688                                                 "Multi rfd not support yet!\n");
1689                         goto rrs_checked;
1690                 } else {
1691                         break;
1692                 }
1693 rrs_checked:
1694                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1695                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1696                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1697                                 if (netif_msg_rx_err(adapter))
1698                                         dev_warn(&pdev->dev,
1699                                                 "wrong packet! rrs word3 is %x\n",
1700                                                 rrs->word3);
1701                         continue;
1702                 }
1703
1704                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1705                                 RRS_PKT_SIZE_MASK);
1706                 /* Good Receive */
1707                 if (likely(rfd_num == 1)) {
1708                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1709                                         RRS_RX_RFD_INDEX_MASK;
1710                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1711                         pci_unmap_single(pdev, buffer_info->dma,
1712                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1713                         skb = buffer_info->skb;
1714                 } else {
1715                         /* TODO */
1716                         if (netif_msg_rx_err(adapter))
1717                                 dev_warn(&pdev->dev,
1718                                         "Multi rfd not support yet!\n");
1719                         break;
1720                 }
1721                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1722                 skb_put(skb, length - ETH_FCS_LEN);
1723                 skb->protocol = eth_type_trans(skb, netdev);
1724                 skb->dev = netdev;
1725                 atl1c_rx_checksum(adapter, skb, rrs);
1726                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1727                         u16 vlan;
1728
1729                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1730                         vlan = le16_to_cpu(vlan);
1731                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1732                 } else
1733                         netif_receive_skb(skb);
1734
1735                 (*work_done)++;
1736                 count++;
1737         }
1738         if (count)
1739                 atl1c_alloc_rx_buffer(adapter, que);
1740 }
1741
1742 /*
1743  * atl1c_clean - NAPI Rx polling callback
1744  * @adapter: board private structure
1745  */
1746 static int atl1c_clean(struct napi_struct *napi, int budget)
1747 {
1748         struct atl1c_adapter *adapter =
1749                         container_of(napi, struct atl1c_adapter, napi);
1750         int work_done = 0;
1751
1752         /* Keep link state information with original netdev */
1753         if (!netif_carrier_ok(adapter->netdev))
1754                 goto quit_polling;
1755         /* just enable one RXQ */
1756         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1757
1758         if (work_done < budget) {
1759 quit_polling:
1760                 napi_complete(napi);
1761                 adapter->hw.intr_mask |= ISR_RX_PKT;
1762                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1763         }
1764         return work_done;
1765 }
1766
1767 #ifdef CONFIG_NET_POLL_CONTROLLER
1768
1769 /*
1770  * Polling 'interrupt' - used by things like netconsole to send skbs
1771  * without having to re-enable interrupts. It's not called while
1772  * the interrupt routine is executing.
1773  */
1774 static void atl1c_netpoll(struct net_device *netdev)
1775 {
1776         struct atl1c_adapter *adapter = netdev_priv(netdev);
1777
1778         disable_irq(adapter->pdev->irq);
1779         atl1c_intr(adapter->pdev->irq, netdev);
1780         enable_irq(adapter->pdev->irq);
1781 }
1782 #endif
1783
1784 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1785 {
1786         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1787         u16 next_to_use = 0;
1788         u16 next_to_clean = 0;
1789
1790         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1791         next_to_use   = tpd_ring->next_to_use;
1792
1793         return (u16)(next_to_clean > next_to_use) ?
1794                 (next_to_clean - next_to_use - 1) :
1795                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1796 }
1797
1798 /*
1799  * get next usable tpd
1800  * Note: should call atl1c_tdp_avail to make sure
1801  * there is enough tpd to use
1802  */
1803 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1804         enum atl1c_trans_queue type)
1805 {
1806         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1807         struct atl1c_tpd_desc *tpd_desc;
1808         u16 next_to_use = 0;
1809
1810         next_to_use = tpd_ring->next_to_use;
1811         if (++tpd_ring->next_to_use == tpd_ring->count)
1812                 tpd_ring->next_to_use = 0;
1813         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1814         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1815         return  tpd_desc;
1816 }
1817
1818 static struct atl1c_buffer *
1819 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1820 {
1821         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1822
1823         return &tpd_ring->buffer_info[tpd -
1824                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1825 }
1826
1827 /* Calculate the transmit packet descript needed*/
1828 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1829 {
1830         u16 tpd_req;
1831         u16 proto_hdr_len = 0;
1832
1833         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1834
1835         if (skb_is_gso(skb)) {
1836                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1837                 if (proto_hdr_len < skb_headlen(skb))
1838                         tpd_req++;
1839                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1840                         tpd_req++;
1841         }
1842         return tpd_req;
1843 }
1844
1845 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1846                           struct sk_buff *skb,
1847                           struct atl1c_tpd_desc **tpd,
1848                           enum atl1c_trans_queue type)
1849 {
1850         struct pci_dev *pdev = adapter->pdev;
1851         u8 hdr_len;
1852         u32 real_len;
1853         unsigned short offload_type;
1854         int err;
1855
1856         if (skb_is_gso(skb)) {
1857                 if (skb_header_cloned(skb)) {
1858                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1859                         if (unlikely(err))
1860                                 return -1;
1861                 }
1862                 offload_type = skb_shinfo(skb)->gso_type;
1863
1864                 if (offload_type & SKB_GSO_TCPV4) {
1865                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1866                                         + ntohs(ip_hdr(skb)->tot_len));
1867
1868                         if (real_len < skb->len)
1869                                 pskb_trim(skb, real_len);
1870
1871                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1872                         if (unlikely(skb->len == hdr_len)) {
1873                                 /* only xsum need */
1874                                 if (netif_msg_tx_queued(adapter))
1875                                         dev_warn(&pdev->dev,
1876                                                 "IPV4 tso with zero data??\n");
1877                                 goto check_sum;
1878                         } else {
1879                                 ip_hdr(skb)->check = 0;
1880                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1881                                                         ip_hdr(skb)->saddr,
1882                                                         ip_hdr(skb)->daddr,
1883                                                         0, IPPROTO_TCP, 0);
1884                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1885                         }
1886                 }
1887
1888                 if (offload_type & SKB_GSO_TCPV6) {
1889                         struct atl1c_tpd_ext_desc *etpd =
1890                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1891
1892                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1893                         *tpd = atl1c_get_tpd(adapter, type);
1894                         ipv6_hdr(skb)->payload_len = 0;
1895                         /* check payload == 0 byte ? */
1896                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1897                         if (unlikely(skb->len == hdr_len)) {
1898                                 /* only xsum need */
1899                                 if (netif_msg_tx_queued(adapter))
1900                                         dev_warn(&pdev->dev,
1901                                                 "IPV6 tso with zero data??\n");
1902                                 goto check_sum;
1903                         } else
1904                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1905                                                 &ipv6_hdr(skb)->saddr,
1906                                                 &ipv6_hdr(skb)->daddr,
1907                                                 0, IPPROTO_TCP, 0);
1908                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1909                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1910                         etpd->pkt_len = cpu_to_le32(skb->len);
1911                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1912                 }
1913
1914                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1915                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1916                                 TPD_TCPHDR_OFFSET_SHIFT;
1917                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1918                                 TPD_MSS_SHIFT;
1919                 return 0;
1920         }
1921
1922 check_sum:
1923         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1924                 u8 css, cso;
1925                 cso = skb_transport_offset(skb);
1926
1927                 if (unlikely(cso & 0x1)) {
1928                         if (netif_msg_tx_err(adapter))
1929                                 dev_err(&adapter->pdev->dev,
1930                                         "payload offset should not an event number\n");
1931                         return -1;
1932                 } else {
1933                         css = cso + skb->csum_offset;
1934
1935                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1936                                         TPD_PLOADOFFSET_SHIFT;
1937                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1938                                         TPD_CCSUM_OFFSET_SHIFT;
1939                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1940                 }
1941         }
1942         return 0;
1943 }
1944
1945 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1946                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1947                         enum atl1c_trans_queue type)
1948 {
1949         struct atl1c_tpd_desc *use_tpd = NULL;
1950         struct atl1c_buffer *buffer_info = NULL;
1951         u16 buf_len = skb_headlen(skb);
1952         u16 map_len = 0;
1953         u16 mapped_len = 0;
1954         u16 hdr_len = 0;
1955         u16 nr_frags;
1956         u16 f;
1957         int tso;
1958
1959         nr_frags = skb_shinfo(skb)->nr_frags;
1960         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1961         if (tso) {
1962                 /* TSO */
1963                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1964                 use_tpd = tpd;
1965
1966                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1967                 buffer_info->length = map_len;
1968                 buffer_info->dma = pci_map_single(adapter->pdev,
1969                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1970                 buffer_info->state = ATL1_BUFFER_BUSY;
1971                 mapped_len += map_len;
1972                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1973                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1974         }
1975
1976         if (mapped_len < buf_len) {
1977                 /* mapped_len == 0, means we should use the first tpd,
1978                    which is given by caller  */
1979                 if (mapped_len == 0)
1980                         use_tpd = tpd;
1981                 else {
1982                         use_tpd = atl1c_get_tpd(adapter, type);
1983                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1984                         use_tpd = atl1c_get_tpd(adapter, type);
1985                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1986                 }
1987                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1988                 buffer_info->length = buf_len - mapped_len;
1989                 buffer_info->dma =
1990                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1991                                         buffer_info->length, PCI_DMA_TODEVICE);
1992                 buffer_info->state = ATL1_BUFFER_BUSY;
1993
1994                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1995                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
1996         }
1997
1998         for (f = 0; f < nr_frags; f++) {
1999                 struct skb_frag_struct *frag;
2000
2001                 frag = &skb_shinfo(skb)->frags[f];
2002
2003                 use_tpd = atl1c_get_tpd(adapter, type);
2004                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2005
2006                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2007                 buffer_info->length = frag->size;
2008                 buffer_info->dma =
2009                         pci_map_page(adapter->pdev, frag->page,
2010                                         frag->page_offset,
2011                                         buffer_info->length,
2012                                         PCI_DMA_TODEVICE);
2013                 buffer_info->state = ATL1_BUFFER_BUSY;
2014
2015                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2016                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2017         }
2018
2019         /* The last tpd */
2020         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2021         /* The last buffer info contain the skb address,
2022            so it will be free after unmap */
2023         buffer_info->skb = skb;
2024 }
2025
2026 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2027                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2028 {
2029         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2030         u32 prod_data;
2031
2032         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2033         switch (type) {
2034         case atl1c_trans_high:
2035                 prod_data &= 0xFFFF0000;
2036                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2037                 break;
2038         case atl1c_trans_normal:
2039                 prod_data &= 0x0000FFFF;
2040                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2041                 break;
2042         default:
2043                 break;
2044         }
2045         wmb();
2046         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2047 }
2048
2049 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2050                                           struct net_device *netdev)
2051 {
2052         struct atl1c_adapter *adapter = netdev_priv(netdev);
2053         unsigned long flags;
2054         u16 tpd_req = 1;
2055         struct atl1c_tpd_desc *tpd;
2056         enum atl1c_trans_queue type = atl1c_trans_normal;
2057
2058         if (test_bit(__AT_DOWN, &adapter->flags)) {
2059                 dev_kfree_skb_any(skb);
2060                 return NETDEV_TX_OK;
2061         }
2062
2063         tpd_req = atl1c_cal_tpd_req(skb);
2064         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2065                 if (netif_msg_pktdata(adapter))
2066                         dev_info(&adapter->pdev->dev, "tx locked\n");
2067                 return NETDEV_TX_LOCKED;
2068         }
2069         if (skb->mark == 0x01)
2070                 type = atl1c_trans_high;
2071         else
2072                 type = atl1c_trans_normal;
2073
2074         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2075                 /* no enough descriptor, just stop queue */
2076                 netif_stop_queue(netdev);
2077                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2078                 return NETDEV_TX_BUSY;
2079         }
2080
2081         tpd = atl1c_get_tpd(adapter, type);
2082
2083         /* do TSO and check sum */
2084         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2085                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2086                 dev_kfree_skb_any(skb);
2087                 return NETDEV_TX_OK;
2088         }
2089
2090         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2091                 u16 vlan = vlan_tx_tag_get(skb);
2092                 __le16 tag;
2093
2094                 vlan = cpu_to_le16(vlan);
2095                 AT_VLAN_TO_TAG(vlan, tag);
2096                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2097                 tpd->vlan_tag = tag;
2098         }
2099
2100         if (skb_network_offset(skb) != ETH_HLEN)
2101                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2102
2103         atl1c_tx_map(adapter, skb, tpd, type);
2104         atl1c_tx_queue(adapter, skb, tpd, type);
2105
2106         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2107         return NETDEV_TX_OK;
2108 }
2109
2110 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2111 {
2112         struct net_device *netdev = adapter->netdev;
2113
2114         free_irq(adapter->pdev->irq, netdev);
2115
2116         if (adapter->have_msi)
2117                 pci_disable_msi(adapter->pdev);
2118 }
2119
2120 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2121 {
2122         struct pci_dev    *pdev   = adapter->pdev;
2123         struct net_device *netdev = adapter->netdev;
2124         int flags = 0;
2125         int err = 0;
2126
2127         adapter->have_msi = true;
2128         err = pci_enable_msi(adapter->pdev);
2129         if (err) {
2130                 if (netif_msg_ifup(adapter))
2131                         dev_err(&pdev->dev,
2132                                 "Unable to allocate MSI interrupt Error: %d\n",
2133                                 err);
2134                 adapter->have_msi = false;
2135         } else
2136                 netdev->irq = pdev->irq;
2137
2138         if (!adapter->have_msi)
2139                 flags |= IRQF_SHARED;
2140         err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2141                         netdev->name, netdev);
2142         if (err) {
2143                 if (netif_msg_ifup(adapter))
2144                         dev_err(&pdev->dev,
2145                                 "Unable to allocate interrupt Error: %d\n",
2146                                 err);
2147                 if (adapter->have_msi)
2148                         pci_disable_msi(adapter->pdev);
2149                 return err;
2150         }
2151         if (netif_msg_ifup(adapter))
2152                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2153         return err;
2154 }
2155
2156 int atl1c_up(struct atl1c_adapter *adapter)
2157 {
2158         struct net_device *netdev = adapter->netdev;
2159         int num;
2160         int err;
2161         int i;
2162
2163         netif_carrier_off(netdev);
2164         atl1c_init_ring_ptrs(adapter);
2165         atl1c_set_multi(netdev);
2166         atl1c_restore_vlan(adapter);
2167
2168         for (i = 0; i < adapter->num_rx_queues; i++) {
2169                 num = atl1c_alloc_rx_buffer(adapter, i);
2170                 if (unlikely(num == 0)) {
2171                         err = -ENOMEM;
2172                         goto err_alloc_rx;
2173                 }
2174         }
2175
2176         if (atl1c_configure(adapter)) {
2177                 err = -EIO;
2178                 goto err_up;
2179         }
2180
2181         err = atl1c_request_irq(adapter);
2182         if (unlikely(err))
2183                 goto err_up;
2184
2185         clear_bit(__AT_DOWN, &adapter->flags);
2186         napi_enable(&adapter->napi);
2187         atl1c_irq_enable(adapter);
2188         atl1c_check_link_status(adapter);
2189         netif_start_queue(netdev);
2190         return err;
2191
2192 err_up:
2193 err_alloc_rx:
2194         atl1c_clean_rx_ring(adapter);
2195         return err;
2196 }
2197
2198 void atl1c_down(struct atl1c_adapter *adapter)
2199 {
2200         struct net_device *netdev = adapter->netdev;
2201
2202         atl1c_del_timer(adapter);
2203         atl1c_cancel_work(adapter);
2204
2205         /* signal that we're down so the interrupt handler does not
2206          * reschedule our watchdog timer */
2207         set_bit(__AT_DOWN, &adapter->flags);
2208         netif_carrier_off(netdev);
2209         napi_disable(&adapter->napi);
2210         atl1c_irq_disable(adapter);
2211         atl1c_free_irq(adapter);
2212         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2213         /* reset MAC to disable all RX/TX */
2214         atl1c_reset_mac(&adapter->hw);
2215         msleep(1);
2216
2217         adapter->link_speed = SPEED_0;
2218         adapter->link_duplex = -1;
2219         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2220         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2221         atl1c_clean_rx_ring(adapter);
2222 }
2223
2224 /*
2225  * atl1c_open - Called when a network interface is made active
2226  * @netdev: network interface device structure
2227  *
2228  * Returns 0 on success, negative value on failure
2229  *
2230  * The open entry point is called when a network interface is made
2231  * active by the system (IFF_UP).  At this point all resources needed
2232  * for transmit and receive operations are allocated, the interrupt
2233  * handler is registered with the OS, the watchdog timer is started,
2234  * and the stack is notified that the interface is ready.
2235  */
2236 static int atl1c_open(struct net_device *netdev)
2237 {
2238         struct atl1c_adapter *adapter = netdev_priv(netdev);
2239         int err;
2240
2241         /* disallow open during test */
2242         if (test_bit(__AT_TESTING, &adapter->flags))
2243                 return -EBUSY;
2244
2245         /* allocate rx/tx dma buffer & descriptors */
2246         err = atl1c_setup_ring_resources(adapter);
2247         if (unlikely(err))
2248                 return err;
2249
2250         err = atl1c_up(adapter);
2251         if (unlikely(err))
2252                 goto err_up;
2253
2254         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2255                 u32 phy_data;
2256
2257                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2258                 phy_data |= MDIO_AP_EN;
2259                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2260         }
2261         return 0;
2262
2263 err_up:
2264         atl1c_free_irq(adapter);
2265         atl1c_free_ring_resources(adapter);
2266         atl1c_reset_mac(&adapter->hw);
2267         return err;
2268 }
2269
2270 /*
2271  * atl1c_close - Disables a network interface
2272  * @netdev: network interface device structure
2273  *
2274  * Returns 0, this is not allowed to fail
2275  *
2276  * The close entry point is called when an interface is de-activated
2277  * by the OS.  The hardware is still under the drivers control, but
2278  * needs to be disabled.  A global MAC reset is issued to stop the
2279  * hardware, and all transmit and receive resources are freed.
2280  */
2281 static int atl1c_close(struct net_device *netdev)
2282 {
2283         struct atl1c_adapter *adapter = netdev_priv(netdev);
2284
2285         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2286         atl1c_down(adapter);
2287         atl1c_free_ring_resources(adapter);
2288         return 0;
2289 }
2290
2291 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2292 {
2293         struct net_device *netdev = pci_get_drvdata(pdev);
2294         struct atl1c_adapter *adapter = netdev_priv(netdev);
2295         struct atl1c_hw *hw = &adapter->hw;
2296         u32 ctrl;
2297         u32 mac_ctrl_data;
2298         u32 master_ctrl_data;
2299         u32 wol_ctrl_data = 0;
2300         u16 mii_bmsr_data;
2301         u16 save_autoneg_advertised;
2302         u16 mii_intr_status_data;
2303         u32 wufc = adapter->wol;
2304         u32 i;
2305         int retval = 0;
2306
2307         if (netif_running(netdev)) {
2308                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2309                 atl1c_down(adapter);
2310         }
2311         netif_device_detach(netdev);
2312         atl1c_disable_l0s_l1(hw);
2313         retval = pci_save_state(pdev);
2314         if (retval)
2315                 return retval;
2316         if (wufc) {
2317                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2318                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2319
2320                 /* get link status */
2321                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2322                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2323                 save_autoneg_advertised = hw->autoneg_advertised;
2324                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2325                 if (atl1c_restart_autoneg(hw) != 0)
2326                         if (netif_msg_link(adapter))
2327                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2328                 hw->phy_configured = false; /* re-init PHY when resume */
2329                 hw->autoneg_advertised = save_autoneg_advertised;
2330                 /* turn on magic packet wol */
2331                 if (wufc & AT_WUFC_MAG)
2332                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2333
2334                 if (wufc & AT_WUFC_LNKC) {
2335                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2336                                 msleep(100);
2337                                 atl1c_read_phy_reg(hw, MII_BMSR,
2338                                         (u16 *)&mii_bmsr_data);
2339                                 if (mii_bmsr_data & BMSR_LSTATUS)
2340                                         break;
2341                         }
2342                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2343                                 if (netif_msg_link(adapter))
2344                                         dev_warn(&pdev->dev,
2345                                                 "%s: Link may change"
2346                                                 "when suspend\n",
2347                                                 atl1c_driver_name);
2348                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2349                         /* only link up can wake up */
2350                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2351                                 if (netif_msg_link(adapter))
2352                                         dev_err(&pdev->dev,
2353                                                 "%s: read write phy "
2354                                                 "register failed.\n",
2355                                                 atl1c_driver_name);
2356                                 goto wol_dis;
2357                         }
2358                 }
2359                 /* clear phy interrupt */
2360                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2361                 /* Config MAC Ctrl register */
2362                 mac_ctrl_data = MAC_CTRL_RX_EN;
2363                 /* set to 10/100M halt duplex */
2364                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2365                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2366                                  MAC_CTRL_PRMLEN_MASK) <<
2367                                  MAC_CTRL_PRMLEN_SHIFT);
2368
2369                 if (adapter->vlgrp)
2370                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2371
2372                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2373                 if (wufc & AT_WUFC_MAG)
2374                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2375
2376                 if (netif_msg_hw(adapter))
2377                         dev_dbg(&pdev->dev,
2378                                 "%s: suspend MAC=0x%x\n",
2379                                 atl1c_driver_name, mac_ctrl_data);
2380                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2381                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2382                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2383
2384                 /* pcie patch */
2385                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2386                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2387                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2388
2389                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2390                 goto suspend_exit;
2391         }
2392 wol_dis:
2393
2394         /* WOL disabled */
2395         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2396
2397         /* pcie patch */
2398         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2399         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2400         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2401
2402         atl1c_phy_disable(hw);
2403         hw->phy_configured = false; /* re-init PHY when resume */
2404
2405         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2406 suspend_exit:
2407
2408         pci_disable_device(pdev);
2409         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2410
2411         return 0;
2412 }
2413
2414 static int atl1c_resume(struct pci_dev *pdev)
2415 {
2416         struct net_device *netdev = pci_get_drvdata(pdev);
2417         struct atl1c_adapter *adapter = netdev_priv(netdev);
2418
2419         pci_set_power_state(pdev, PCI_D0);
2420         pci_restore_state(pdev);
2421         pci_enable_wake(pdev, PCI_D3hot, 0);
2422         pci_enable_wake(pdev, PCI_D3cold, 0);
2423
2424         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2425
2426         atl1c_phy_reset(&adapter->hw);
2427         atl1c_reset_mac(&adapter->hw);
2428         netif_device_attach(netdev);
2429         if (netif_running(netdev))
2430                 atl1c_up(adapter);
2431
2432         return 0;
2433 }
2434
2435 static void atl1c_shutdown(struct pci_dev *pdev)
2436 {
2437         atl1c_suspend(pdev, PMSG_SUSPEND);
2438 }
2439
2440 static const struct net_device_ops atl1c_netdev_ops = {
2441         .ndo_open               = atl1c_open,
2442         .ndo_stop               = atl1c_close,
2443         .ndo_validate_addr      = eth_validate_addr,
2444         .ndo_start_xmit         = atl1c_xmit_frame,
2445         .ndo_set_mac_address    = atl1c_set_mac_addr,
2446         .ndo_set_multicast_list = atl1c_set_multi,
2447         .ndo_change_mtu         = atl1c_change_mtu,
2448         .ndo_do_ioctl           = atl1c_ioctl,
2449         .ndo_tx_timeout         = atl1c_tx_timeout,
2450         .ndo_get_stats          = atl1c_get_stats,
2451         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2452 #ifdef CONFIG_NET_POLL_CONTROLLER
2453         .ndo_poll_controller    = atl1c_netpoll,
2454 #endif
2455 };
2456
2457 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2458 {
2459         SET_NETDEV_DEV(netdev, &pdev->dev);
2460         pci_set_drvdata(pdev, netdev);
2461
2462         netdev->irq  = pdev->irq;
2463         netdev->netdev_ops = &atl1c_netdev_ops;
2464         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2465         atl1c_set_ethtool_ops(netdev);
2466
2467         /* TODO: add when ready */
2468         netdev->features =      NETIF_F_SG         |
2469                                 NETIF_F_HW_CSUM    |
2470                                 NETIF_F_HW_VLAN_TX |
2471                                 NETIF_F_HW_VLAN_RX |
2472                                 NETIF_F_TSO        |
2473                                 NETIF_F_TSO6;
2474         return 0;
2475 }
2476
2477 /*
2478  * atl1c_probe - Device Initialization Routine
2479  * @pdev: PCI device information struct
2480  * @ent: entry in atl1c_pci_tbl
2481  *
2482  * Returns 0 on success, negative on failure
2483  *
2484  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2485  * The OS initialization, configuring of the adapter private structure,
2486  * and a hardware reset occur.
2487  */
2488 static int __devinit atl1c_probe(struct pci_dev *pdev,
2489                                  const struct pci_device_id *ent)
2490 {
2491         struct net_device *netdev;
2492         struct atl1c_adapter *adapter;
2493         static int cards_found;
2494
2495         int err = 0;
2496
2497         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2498         err = pci_enable_device_mem(pdev);
2499         if (err) {
2500                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2501                 return err;
2502         }
2503
2504         /*
2505          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2506          * shared register for the high 32 bits, so only a single, aligned,
2507          * 4 GB physical address range can be used at a time.
2508          *
2509          * Supporting 64-bit DMA on this hardware is more trouble than it's
2510          * worth.  It is far easier to limit to 32-bit DMA than update
2511          * various kernel subsystems to support the mechanics required by a
2512          * fixed-high-32-bit system.
2513          */
2514         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2515             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2516                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2517                 goto err_dma;
2518         }
2519
2520         err = pci_request_regions(pdev, atl1c_driver_name);
2521         if (err) {
2522                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2523                 goto err_pci_reg;
2524         }
2525
2526         pci_set_master(pdev);
2527
2528         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2529         if (netdev == NULL) {
2530                 err = -ENOMEM;
2531                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2532                 goto err_alloc_etherdev;
2533         }
2534
2535         err = atl1c_init_netdev(netdev, pdev);
2536         if (err) {
2537                 dev_err(&pdev->dev, "init netdevice failed\n");
2538                 goto err_init_netdev;
2539         }
2540         adapter = netdev_priv(netdev);
2541         adapter->bd_number = cards_found;
2542         adapter->netdev = netdev;
2543         adapter->pdev = pdev;
2544         adapter->hw.adapter = adapter;
2545         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2546         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2547         if (!adapter->hw.hw_addr) {
2548                 err = -EIO;
2549                 dev_err(&pdev->dev, "cannot map device registers\n");
2550                 goto err_ioremap;
2551         }
2552         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2553
2554         /* init mii data */
2555         adapter->mii.dev = netdev;
2556         adapter->mii.mdio_read  = atl1c_mdio_read;
2557         adapter->mii.mdio_write = atl1c_mdio_write;
2558         adapter->mii.phy_id_mask = 0x1f;
2559         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2560         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2561         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2562                         (unsigned long)adapter);
2563         /* setup the private structure */
2564         err = atl1c_sw_init(adapter);
2565         if (err) {
2566                 dev_err(&pdev->dev, "net device private data init failed\n");
2567                 goto err_sw_init;
2568         }
2569         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2570                         ATL1C_PCIE_PHY_RESET);
2571
2572         /* Init GPHY as early as possible due to power saving issue  */
2573         atl1c_phy_reset(&adapter->hw);
2574
2575         err = atl1c_reset_mac(&adapter->hw);
2576         if (err) {
2577                 err = -EIO;
2578                 goto err_reset;
2579         }
2580
2581         device_init_wakeup(&pdev->dev, 1);
2582         /* reset the controller to
2583          * put the device in a known good starting state */
2584         err = atl1c_phy_init(&adapter->hw);
2585         if (err) {
2586                 err = -EIO;
2587                 goto err_reset;
2588         }
2589         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2590                 err = -EIO;
2591                 dev_err(&pdev->dev, "get mac address failed\n");
2592                 goto err_eeprom;
2593         }
2594         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2595         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2596         if (netif_msg_probe(adapter))
2597                 dev_dbg(&pdev->dev,
2598                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2599                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2600                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2601                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2602
2603         atl1c_hw_set_mac_addr(&adapter->hw);
2604         INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2605         INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2606         err = register_netdev(netdev);
2607         if (err) {
2608                 dev_err(&pdev->dev, "register netdevice failed\n");
2609                 goto err_register;
2610         }
2611
2612         if (netif_msg_probe(adapter))
2613                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2614         cards_found++;
2615         return 0;
2616
2617 err_reset:
2618 err_register:
2619 err_sw_init:
2620 err_eeprom:
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 __devexit 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         atl1c_phy_disable(&adapter->hw);
2649
2650         iounmap(adapter->hw.hw_addr);
2651
2652         pci_release_regions(pdev);
2653         pci_disable_device(pdev);
2654         free_netdev(netdev);
2655 }
2656
2657 /*
2658  * atl1c_io_error_detected - called when PCI error is detected
2659  * @pdev: Pointer to PCI device
2660  * @state: The current pci connection state
2661  *
2662  * This function is called after a PCI bus error affecting
2663  * this device has been detected.
2664  */
2665 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2666                                                 pci_channel_state_t state)
2667 {
2668         struct net_device *netdev = pci_get_drvdata(pdev);
2669         struct atl1c_adapter *adapter = netdev_priv(netdev);
2670
2671         netif_device_detach(netdev);
2672
2673         if (state == pci_channel_io_perm_failure)
2674                 return PCI_ERS_RESULT_DISCONNECT;
2675
2676         if (netif_running(netdev))
2677                 atl1c_down(adapter);
2678
2679         pci_disable_device(pdev);
2680
2681         /* Request a slot slot reset. */
2682         return PCI_ERS_RESULT_NEED_RESET;
2683 }
2684
2685 /*
2686  * atl1c_io_slot_reset - called after the pci bus has been reset.
2687  * @pdev: Pointer to PCI device
2688  *
2689  * Restart the card from scratch, as if from a cold-boot. Implementation
2690  * resembles the first-half of the e1000_resume routine.
2691  */
2692 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2693 {
2694         struct net_device *netdev = pci_get_drvdata(pdev);
2695         struct atl1c_adapter *adapter = netdev_priv(netdev);
2696
2697         if (pci_enable_device(pdev)) {
2698                 if (netif_msg_hw(adapter))
2699                         dev_err(&pdev->dev,
2700                                 "Cannot re-enable PCI device after reset\n");
2701                 return PCI_ERS_RESULT_DISCONNECT;
2702         }
2703         pci_set_master(pdev);
2704
2705         pci_enable_wake(pdev, PCI_D3hot, 0);
2706         pci_enable_wake(pdev, PCI_D3cold, 0);
2707
2708         atl1c_reset_mac(&adapter->hw);
2709
2710         return PCI_ERS_RESULT_RECOVERED;
2711 }
2712
2713 /*
2714  * atl1c_io_resume - called when traffic can start flowing again.
2715  * @pdev: Pointer to PCI device
2716  *
2717  * This callback is called when the error recovery driver tells us that
2718  * its OK to resume normal operation. Implementation resembles the
2719  * second-half of the atl1c_resume routine.
2720  */
2721 static void atl1c_io_resume(struct pci_dev *pdev)
2722 {
2723         struct net_device *netdev = pci_get_drvdata(pdev);
2724         struct atl1c_adapter *adapter = netdev_priv(netdev);
2725
2726         if (netif_running(netdev)) {
2727                 if (atl1c_up(adapter)) {
2728                         if (netif_msg_hw(adapter))
2729                                 dev_err(&pdev->dev,
2730                                         "Cannot bring device back up after reset\n");
2731                         return;
2732                 }
2733         }
2734
2735         netif_device_attach(netdev);
2736 }
2737
2738 static struct pci_error_handlers atl1c_err_handler = {
2739         .error_detected = atl1c_io_error_detected,
2740         .slot_reset = atl1c_io_slot_reset,
2741         .resume = atl1c_io_resume,
2742 };
2743
2744 static struct pci_driver atl1c_driver = {
2745         .name     = atl1c_driver_name,
2746         .id_table = atl1c_pci_tbl,
2747         .probe    = atl1c_probe,
2748         .remove   = __devexit_p(atl1c_remove),
2749         /* Power Managment Hooks */
2750         .suspend  = atl1c_suspend,
2751         .resume   = atl1c_resume,
2752         .shutdown = atl1c_shutdown,
2753         .err_handler = &atl1c_err_handler
2754 };
2755
2756 /*
2757  * atl1c_init_module - Driver Registration Routine
2758  *
2759  * atl1c_init_module is the first routine called when the driver is
2760  * loaded. All it does is register with the PCI subsystem.
2761  */
2762 static int __init atl1c_init_module(void)
2763 {
2764         return pci_register_driver(&atl1c_driver);
2765 }
2766
2767 /*
2768  * atl1c_exit_module - Driver Exit Cleanup Routine
2769  *
2770  * atl1c_exit_module is called just before the driver is removed
2771  * from memory.
2772  */
2773 static void __exit atl1c_exit_module(void)
2774 {
2775         pci_unregister_driver(&atl1c_driver);
2776 }
2777
2778 module_init(atl1c_init_module);
2779 module_exit(atl1c_exit_module);