netdevice: safe convert to netdev_priv() #part-1
[linux-2.6.git] / drivers / net / atl1e / atl1e_main.c
1 /*
2  * Copyright(c) 2007 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 "atl1e.h"
23
24 #define DRV_VERSION "1.0.0.7-NAPI"
25
26 char atl1e_driver_name[] = "ATL1E";
27 char atl1e_driver_version[] = DRV_VERSION;
28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
29 /*
30  * atl1e_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 atl1e_pci_tbl[] = {
39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
40         /* required last entry */
41         { 0 }
42 };
43 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
44
45 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
46 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
47 MODULE_LICENSE("GPL");
48 MODULE_VERSION(DRV_VERSION);
49
50 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
51
52 static const u16
53 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
54 {
55         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
56         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
57         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
58         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
59 };
60
61 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
62 {
63         REG_RXF0_BASE_ADDR_HI,
64         REG_RXF1_BASE_ADDR_HI,
65         REG_RXF2_BASE_ADDR_HI,
66         REG_RXF3_BASE_ADDR_HI
67 };
68
69 static const u16
70 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
71 {
72         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
73         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
74         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
75         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
76 };
77
78 static const u16
79 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
80 {
81         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
82         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
83         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
84         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
85 };
86
87 static const u16 atl1e_pay_load_size[] = {
88         128, 256, 512, 1024, 2048, 4096,
89 };
90
91 /*
92  * atl1e_irq_enable - Enable default interrupt generation settings
93  * @adapter: board private structure
94  */
95 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
96 {
97         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
98                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
99                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
100                 AT_WRITE_FLUSH(&adapter->hw);
101         }
102 }
103
104 /*
105  * atl1e_irq_disable - Mask off interrupt generation on the NIC
106  * @adapter: board private structure
107  */
108 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
109 {
110         atomic_inc(&adapter->irq_sem);
111         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
112         AT_WRITE_FLUSH(&adapter->hw);
113         synchronize_irq(adapter->pdev->irq);
114 }
115
116 /*
117  * atl1e_irq_reset - reset interrupt confiure on the NIC
118  * @adapter: board private structure
119  */
120 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
121 {
122         atomic_set(&adapter->irq_sem, 0);
123         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
124         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
125         AT_WRITE_FLUSH(&adapter->hw);
126 }
127
128 /*
129  * atl1e_phy_config - Timer Call-back
130  * @data: pointer to netdev cast into an unsigned long
131  */
132 static void atl1e_phy_config(unsigned long data)
133 {
134         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
135         struct atl1e_hw *hw = &adapter->hw;
136         unsigned long flags;
137
138         spin_lock_irqsave(&adapter->mdio_lock, flags);
139         atl1e_restart_autoneg(hw);
140         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
141 }
142
143 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
144 {
145
146         WARN_ON(in_interrupt());
147         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
148                 msleep(1);
149         atl1e_down(adapter);
150         atl1e_up(adapter);
151         clear_bit(__AT_RESETTING, &adapter->flags);
152 }
153
154 static void atl1e_reset_task(struct work_struct *work)
155 {
156         struct atl1e_adapter *adapter;
157         adapter = container_of(work, struct atl1e_adapter, reset_task);
158
159         atl1e_reinit_locked(adapter);
160 }
161
162 static int atl1e_check_link(struct atl1e_adapter *adapter)
163 {
164         struct atl1e_hw *hw = &adapter->hw;
165         struct net_device *netdev = adapter->netdev;
166         struct pci_dev    *pdev   = adapter->pdev;
167         int err = 0;
168         u16 speed, duplex, phy_data;
169
170         /* MII_BMSR must read twise */
171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
173         if ((phy_data & BMSR_LSTATUS) == 0) {
174                 /* link down */
175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
176                         u32 value;
177                         /* disable rx */
178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
179                         value &= ~MAC_CTRL_RX_EN;
180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
181                         adapter->link_speed = SPEED_0;
182                         netif_carrier_off(netdev);
183                         netif_stop_queue(netdev);
184                 }
185         } else {
186                 /* Link Up */
187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
188                 if (unlikely(err))
189                         return err;
190
191                 /* link result is our setting */
192                 if (adapter->link_speed != speed ||
193                     adapter->link_duplex != duplex) {
194                         adapter->link_speed  = speed;
195                         adapter->link_duplex = duplex;
196                         atl1e_setup_mac_ctrl(adapter);
197                         dev_info(&pdev->dev,
198                                 "%s: %s NIC Link is Up<%d Mbps %s>\n",
199                                 atl1e_driver_name, netdev->name,
200                                 adapter->link_speed,
201                                 adapter->link_duplex == FULL_DUPLEX ?
202                                 "Full Duplex" : "Half Duplex");
203                 }
204
205                 if (!netif_carrier_ok(netdev)) {
206                         /* Link down -> Up */
207                         netif_carrier_on(netdev);
208                         netif_wake_queue(netdev);
209                 }
210         }
211         return 0;
212 }
213
214 /*
215  * atl1e_link_chg_task - deal with link change event Out of interrupt context
216  * @netdev: network interface device structure
217  */
218 static void atl1e_link_chg_task(struct work_struct *work)
219 {
220         struct atl1e_adapter *adapter;
221         unsigned long flags;
222
223         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
224         spin_lock_irqsave(&adapter->mdio_lock, flags);
225         atl1e_check_link(adapter);
226         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
227 }
228
229 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
230 {
231         struct net_device *netdev = adapter->netdev;
232         struct pci_dev    *pdev   = adapter->pdev;
233         u16 phy_data = 0;
234         u16 link_up = 0;
235
236         spin_lock(&adapter->mdio_lock);
237         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
238         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
239         spin_unlock(&adapter->mdio_lock);
240         link_up = phy_data & BMSR_LSTATUS;
241         /* notify upper layer link down ASAP */
242         if (!link_up) {
243                 if (netif_carrier_ok(netdev)) {
244                         /* old link state: Up */
245                         dev_info(&pdev->dev, "%s: %s NIC Link is Down\n",
246                                         atl1e_driver_name, netdev->name);
247                         adapter->link_speed = SPEED_0;
248                         netif_stop_queue(netdev);
249                 }
250         }
251         schedule_work(&adapter->link_chg_task);
252 }
253
254 static void atl1e_del_timer(struct atl1e_adapter *adapter)
255 {
256         del_timer_sync(&adapter->phy_config_timer);
257 }
258
259 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
260 {
261         cancel_work_sync(&adapter->reset_task);
262         cancel_work_sync(&adapter->link_chg_task);
263 }
264
265 /*
266  * atl1e_tx_timeout - Respond to a Tx Hang
267  * @netdev: network interface device structure
268  */
269 static void atl1e_tx_timeout(struct net_device *netdev)
270 {
271         struct atl1e_adapter *adapter = netdev_priv(netdev);
272
273         /* Do the reset outside of interrupt context */
274         schedule_work(&adapter->reset_task);
275 }
276
277 /*
278  * atl1e_set_multi - Multicast and Promiscuous mode set
279  * @netdev: network interface device structure
280  *
281  * The set_multi entry point is called whenever the multicast address
282  * list or the network interface flags are updated.  This routine is
283  * responsible for configuring the hardware for proper multicast,
284  * promiscuous mode, and all-multi behavior.
285  */
286 static void atl1e_set_multi(struct net_device *netdev)
287 {
288         struct atl1e_adapter *adapter = netdev_priv(netdev);
289         struct atl1e_hw *hw = &adapter->hw;
290         struct dev_mc_list *mc_ptr;
291         u32 mac_ctrl_data = 0;
292         u32 hash_value;
293
294         /* Check for Promiscuous and All Multicast modes */
295         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
296
297         if (netdev->flags & IFF_PROMISC) {
298                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
299         } else if (netdev->flags & IFF_ALLMULTI) {
300                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
301                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
302         } else {
303                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
304         }
305
306         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
307
308         /* clear the old settings from the multicast hash table */
309         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
310         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
311
312         /* comoute mc addresses' hash value ,and put it into hash table */
313         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
314                 hash_value = atl1e_hash_mc_addr(hw, mc_ptr->dmi_addr);
315                 atl1e_hash_set(hw, hash_value);
316         }
317 }
318
319 static void atl1e_vlan_rx_register(struct net_device *netdev,
320                                    struct vlan_group *grp)
321 {
322         struct atl1e_adapter *adapter = netdev_priv(netdev);
323         struct pci_dev *pdev = adapter->pdev;
324         u32 mac_ctrl_data = 0;
325
326         dev_dbg(&pdev->dev, "atl1e_vlan_rx_register\n");
327
328         atl1e_irq_disable(adapter);
329
330         adapter->vlgrp = grp;
331         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
332
333         if (grp) {
334                 /* enable VLAN tag insert/strip */
335                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
336         } else {
337                 /* disable VLAN tag insert/strip */
338                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
339         }
340
341         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
342         atl1e_irq_enable(adapter);
343 }
344
345 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
346 {
347         struct pci_dev *pdev = adapter->pdev;
348
349         dev_dbg(&pdev->dev, "atl1e_restore_vlan !");
350         atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp);
351 }
352 /*
353  * atl1e_set_mac - Change the Ethernet Address of the NIC
354  * @netdev: network interface device structure
355  * @p: pointer to an address structure
356  *
357  * Returns 0 on success, negative on failure
358  */
359 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
360 {
361         struct atl1e_adapter *adapter = netdev_priv(netdev);
362         struct sockaddr *addr = p;
363
364         if (!is_valid_ether_addr(addr->sa_data))
365                 return -EADDRNOTAVAIL;
366
367         if (netif_running(netdev))
368                 return -EBUSY;
369
370         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
371         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
372
373         atl1e_hw_set_mac_addr(&adapter->hw);
374
375         return 0;
376 }
377
378 /*
379  * atl1e_change_mtu - Change the Maximum Transfer Unit
380  * @netdev: network interface device structure
381  * @new_mtu: new value for maximum frame size
382  *
383  * Returns 0 on success, negative on failure
384  */
385 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
386 {
387         struct atl1e_adapter *adapter = netdev_priv(netdev);
388         int old_mtu   = netdev->mtu;
389         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
390
391         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
392                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
393                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
394                 return -EINVAL;
395         }
396         /* set MTU */
397         if (old_mtu != new_mtu && netif_running(netdev)) {
398                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
399                         msleep(1);
400                 netdev->mtu = new_mtu;
401                 adapter->hw.max_frame_size = new_mtu;
402                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
403                 atl1e_down(adapter);
404                 atl1e_up(adapter);
405                 clear_bit(__AT_RESETTING, &adapter->flags);
406         }
407         return 0;
408 }
409
410 /*
411  *  caller should hold mdio_lock
412  */
413 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
414 {
415         struct atl1e_adapter *adapter = netdev_priv(netdev);
416         u16 result;
417
418         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
419         return result;
420 }
421
422 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
423                              int reg_num, int val)
424 {
425         struct atl1e_adapter *adapter = netdev_priv(netdev);
426
427         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
428 }
429
430 /*
431  * atl1e_mii_ioctl -
432  * @netdev:
433  * @ifreq:
434  * @cmd:
435  */
436 static int atl1e_mii_ioctl(struct net_device *netdev,
437                            struct ifreq *ifr, int cmd)
438 {
439         struct atl1e_adapter *adapter = netdev_priv(netdev);
440         struct pci_dev *pdev = adapter->pdev;
441         struct mii_ioctl_data *data = if_mii(ifr);
442         unsigned long flags;
443         int retval = 0;
444
445         if (!netif_running(netdev))
446                 return -EINVAL;
447
448         spin_lock_irqsave(&adapter->mdio_lock, flags);
449         switch (cmd) {
450         case SIOCGMIIPHY:
451                 data->phy_id = 0;
452                 break;
453
454         case SIOCGMIIREG:
455                 if (!capable(CAP_NET_ADMIN)) {
456                         retval = -EPERM;
457                         goto out;
458                 }
459                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
460                                     &data->val_out)) {
461                         retval = -EIO;
462                         goto out;
463                 }
464                 break;
465
466         case SIOCSMIIREG:
467                 if (!capable(CAP_NET_ADMIN)) {
468                         retval = -EPERM;
469                         goto out;
470                 }
471                 if (data->reg_num & ~(0x1F)) {
472                         retval = -EFAULT;
473                         goto out;
474                 }
475
476                 dev_dbg(&pdev->dev, "<atl1e_mii_ioctl> write %x %x",
477                                 data->reg_num, data->val_in);
478                 if (atl1e_write_phy_reg(&adapter->hw,
479                                      data->reg_num, data->val_in)) {
480                         retval = -EIO;
481                         goto out;
482                 }
483                 break;
484
485         default:
486                 retval = -EOPNOTSUPP;
487                 break;
488         }
489 out:
490         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
491         return retval;
492
493 }
494
495 /*
496  * atl1e_ioctl -
497  * @netdev:
498  * @ifreq:
499  * @cmd:
500  */
501 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
502 {
503         switch (cmd) {
504         case SIOCGMIIPHY:
505         case SIOCGMIIREG:
506         case SIOCSMIIREG:
507                 return atl1e_mii_ioctl(netdev, ifr, cmd);
508         default:
509                 return -EOPNOTSUPP;
510         }
511 }
512
513 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
514 {
515         u16 cmd;
516
517         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
518         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
519         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
520         pci_write_config_word(pdev, PCI_COMMAND, cmd);
521
522         /*
523          * some motherboards BIOS(PXE/EFI) driver may set PME
524          * while they transfer control to OS (Windows/Linux)
525          * so we should clear this bit before NIC work normally
526          */
527         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
528         msleep(1);
529 }
530
531 /*
532  * atl1e_alloc_queues - Allocate memory for all rings
533  * @adapter: board private structure to initialize
534  *
535  */
536 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
537 {
538         return 0;
539 }
540
541 /*
542  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
543  * @adapter: board private structure to initialize
544  *
545  * atl1e_sw_init initializes the Adapter private data structure.
546  * Fields are initialized based on PCI device information and
547  * OS network device settings (MTU size).
548  */
549 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
550 {
551         struct atl1e_hw *hw   = &adapter->hw;
552         struct pci_dev  *pdev = adapter->pdev;
553         u32 phy_status_data = 0;
554
555         adapter->wol = 0;
556         adapter->link_speed = SPEED_0;   /* hardware init */
557         adapter->link_duplex = FULL_DUPLEX;
558         adapter->num_rx_queues = 1;
559
560         /* PCI config space info */
561         hw->vendor_id = pdev->vendor;
562         hw->device_id = pdev->device;
563         hw->subsystem_vendor_id = pdev->subsystem_vendor;
564         hw->subsystem_id = pdev->subsystem_device;
565
566         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
567         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
568
569         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
570         /* nic type */
571         if (hw->revision_id >= 0xF0) {
572                 hw->nic_type = athr_l2e_revB;
573         } else {
574                 if (phy_status_data & PHY_STATUS_100M)
575                         hw->nic_type = athr_l1e;
576                 else
577                         hw->nic_type = athr_l2e_revA;
578         }
579
580         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
581
582         if (phy_status_data & PHY_STATUS_EMI_CA)
583                 hw->emi_ca = true;
584         else
585                 hw->emi_ca = false;
586
587         hw->phy_configured = false;
588         hw->preamble_len = 7;
589         hw->max_frame_size = adapter->netdev->mtu;
590         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
591                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
592
593         hw->rrs_type = atl1e_rrs_disable;
594         hw->indirect_tab = 0;
595         hw->base_cpu = 0;
596
597         /* need confirm */
598
599         hw->ict = 50000;                 /* 100ms */
600         hw->smb_timer = 200000;          /* 200ms  */
601         hw->tpd_burst = 5;
602         hw->rrd_thresh = 1;
603         hw->tpd_thresh = adapter->tx_ring.count / 2;
604         hw->rx_count_down = 4;  /* 2us resolution */
605         hw->tx_count_down = hw->imt * 4 / 3;
606         hw->dmar_block = atl1e_dma_req_1024;
607         hw->dmaw_block = atl1e_dma_req_1024;
608         hw->dmar_dly_cnt = 15;
609         hw->dmaw_dly_cnt = 4;
610
611         if (atl1e_alloc_queues(adapter)) {
612                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
613                 return -ENOMEM;
614         }
615
616         atomic_set(&adapter->irq_sem, 1);
617         spin_lock_init(&adapter->mdio_lock);
618         spin_lock_init(&adapter->tx_lock);
619
620         set_bit(__AT_DOWN, &adapter->flags);
621
622         return 0;
623 }
624
625 /*
626  * atl1e_clean_tx_ring - Free Tx-skb
627  * @adapter: board private structure
628  */
629 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
630 {
631         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
632                                 &adapter->tx_ring;
633         struct atl1e_tx_buffer *tx_buffer = NULL;
634         struct pci_dev *pdev = adapter->pdev;
635         u16 index, ring_count;
636
637         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
638                 return;
639
640         ring_count = tx_ring->count;
641         /* first unmmap dma */
642         for (index = 0; index < ring_count; index++) {
643                 tx_buffer = &tx_ring->tx_buffer[index];
644                 if (tx_buffer->dma) {
645                         pci_unmap_page(pdev, tx_buffer->dma,
646                                         tx_buffer->length, PCI_DMA_TODEVICE);
647                         tx_buffer->dma = 0;
648                 }
649         }
650         /* second free skb */
651         for (index = 0; index < ring_count; index++) {
652                 tx_buffer = &tx_ring->tx_buffer[index];
653                 if (tx_buffer->skb) {
654                         dev_kfree_skb_any(tx_buffer->skb);
655                         tx_buffer->skb = NULL;
656                 }
657         }
658         /* Zero out Tx-buffers */
659         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
660                                 ring_count);
661         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
662                                 ring_count);
663 }
664
665 /*
666  * atl1e_clean_rx_ring - Free rx-reservation skbs
667  * @adapter: board private structure
668  */
669 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
670 {
671         struct atl1e_rx_ring *rx_ring =
672                 (struct atl1e_rx_ring *)&adapter->rx_ring;
673         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
674         u16 i, j;
675
676
677         if (adapter->ring_vir_addr == NULL)
678                 return;
679         /* Zero out the descriptor ring */
680         for (i = 0; i < adapter->num_rx_queues; i++) {
681                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
682                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
683                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
684                                                 rx_ring->real_page_size);
685                         }
686                 }
687         }
688 }
689
690 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
691 {
692         *ring_size = ((u32)(adapter->tx_ring.count *
693                      sizeof(struct atl1e_tpd_desc) + 7
694                         /* tx ring, qword align */
695                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
696                         adapter->num_rx_queues + 31
697                         /* rx ring,  32 bytes align */
698                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
699                         sizeof(u32) + 3));
700                         /* tx, rx cmd, dword align   */
701 }
702
703 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
704 {
705         struct atl1e_tx_ring *tx_ring = NULL;
706         struct atl1e_rx_ring *rx_ring = NULL;
707
708         tx_ring = &adapter->tx_ring;
709         rx_ring = &adapter->rx_ring;
710
711         rx_ring->real_page_size = adapter->rx_ring.page_size
712                                  + adapter->hw.max_frame_size
713                                  + ETH_HLEN + VLAN_HLEN
714                                  + ETH_FCS_LEN;
715         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
716         atl1e_cal_ring_size(adapter, &adapter->ring_size);
717
718         adapter->ring_vir_addr = NULL;
719         adapter->rx_ring.desc = NULL;
720         rwlock_init(&adapter->tx_ring.tx_lock);
721
722         return;
723 }
724
725 /*
726  * Read / Write Ptr Initialize:
727  */
728 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
729 {
730         struct atl1e_tx_ring *tx_ring = NULL;
731         struct atl1e_rx_ring *rx_ring = NULL;
732         struct atl1e_rx_page_desc *rx_page_desc = NULL;
733         int i, j;
734
735         tx_ring = &adapter->tx_ring;
736         rx_ring = &adapter->rx_ring;
737         rx_page_desc = rx_ring->rx_page_desc;
738
739         tx_ring->next_to_use = 0;
740         atomic_set(&tx_ring->next_to_clean, 0);
741
742         for (i = 0; i < adapter->num_rx_queues; i++) {
743                 rx_page_desc[i].rx_using  = 0;
744                 rx_page_desc[i].rx_nxseq = 0;
745                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
746                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
747                         rx_page_desc[i].rx_page[j].read_offset = 0;
748                 }
749         }
750 }
751
752 /*
753  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
754  * @adapter: board private structure
755  *
756  * Free all transmit software resources
757  */
758 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
759 {
760         struct pci_dev *pdev = adapter->pdev;
761
762         atl1e_clean_tx_ring(adapter);
763         atl1e_clean_rx_ring(adapter);
764
765         if (adapter->ring_vir_addr) {
766                 pci_free_consistent(pdev, adapter->ring_size,
767                                 adapter->ring_vir_addr, adapter->ring_dma);
768                 adapter->ring_vir_addr = NULL;
769         }
770
771         if (adapter->tx_ring.tx_buffer) {
772                 kfree(adapter->tx_ring.tx_buffer);
773                 adapter->tx_ring.tx_buffer = NULL;
774         }
775 }
776
777 /*
778  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
779  * @adapter: board private structure
780  *
781  * Return 0 on success, negative on failure
782  */
783 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
784 {
785         struct pci_dev *pdev = adapter->pdev;
786         struct atl1e_tx_ring *tx_ring;
787         struct atl1e_rx_ring *rx_ring;
788         struct atl1e_rx_page_desc  *rx_page_desc;
789         int size, i, j;
790         u32 offset = 0;
791         int err = 0;
792
793         if (adapter->ring_vir_addr != NULL)
794                 return 0; /* alloced already */
795
796         tx_ring = &adapter->tx_ring;
797         rx_ring = &adapter->rx_ring;
798
799         /* real ring DMA buffer */
800
801         size = adapter->ring_size;
802         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
803                         adapter->ring_size, &adapter->ring_dma);
804
805         if (adapter->ring_vir_addr == NULL) {
806                 dev_err(&pdev->dev, "pci_alloc_consistent failed, "
807                                     "size = D%d", size);
808                 return -ENOMEM;
809         }
810
811         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
812
813         rx_page_desc = rx_ring->rx_page_desc;
814
815         /* Init TPD Ring */
816         tx_ring->dma = roundup(adapter->ring_dma, 8);
817         offset = tx_ring->dma - adapter->ring_dma;
818         tx_ring->desc = (struct atl1e_tpd_desc *)
819                         (adapter->ring_vir_addr + offset);
820         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
821         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
822         if (tx_ring->tx_buffer == NULL) {
823                 dev_err(&pdev->dev, "kzalloc failed , size = D%d", size);
824                 err = -ENOMEM;
825                 goto failed;
826         }
827
828         /* Init RXF-Pages */
829         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
830         offset = roundup(offset, 32);
831
832         for (i = 0; i < adapter->num_rx_queues; i++) {
833                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
834                         rx_page_desc[i].rx_page[j].dma =
835                                 adapter->ring_dma + offset;
836                         rx_page_desc[i].rx_page[j].addr =
837                                 adapter->ring_vir_addr + offset;
838                         offset += rx_ring->real_page_size;
839                 }
840         }
841
842         /* Init CMB dma address */
843         tx_ring->cmb_dma = adapter->ring_dma + offset;
844         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
845         offset += sizeof(u32);
846
847         for (i = 0; i < adapter->num_rx_queues; i++) {
848                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
849                         rx_page_desc[i].rx_page[j].write_offset_dma =
850                                 adapter->ring_dma + offset;
851                         rx_page_desc[i].rx_page[j].write_offset_addr =
852                                 adapter->ring_vir_addr + offset;
853                         offset += sizeof(u32);
854                 }
855         }
856
857         if (unlikely(offset > adapter->ring_size)) {
858                 dev_err(&pdev->dev, "offset(%d) > ring size(%d) !!\n",
859                                 offset, adapter->ring_size);
860                 err = -1;
861                 goto failed;
862         }
863
864         return 0;
865 failed:
866         if (adapter->ring_vir_addr != NULL) {
867                 pci_free_consistent(pdev, adapter->ring_size,
868                                 adapter->ring_vir_addr, adapter->ring_dma);
869                 adapter->ring_vir_addr = NULL;
870         }
871         return err;
872 }
873
874 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
875 {
876
877         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
878         struct atl1e_rx_ring *rx_ring =
879                         (struct atl1e_rx_ring *)&adapter->rx_ring;
880         struct atl1e_tx_ring *tx_ring =
881                         (struct atl1e_tx_ring *)&adapter->tx_ring;
882         struct atl1e_rx_page_desc *rx_page_desc = NULL;
883         int i, j;
884
885         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
886                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
887         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
888                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
889         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
890         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
891                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
892
893         rx_page_desc = rx_ring->rx_page_desc;
894         /* RXF Page Physical address / Page Length */
895         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
896                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
897                                  (u32)((adapter->ring_dma &
898                                  AT_DMA_HI_ADDR_MASK) >> 32));
899                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
900                         u32 page_phy_addr;
901                         u32 offset_phy_addr;
902
903                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
904                         offset_phy_addr =
905                                    rx_page_desc[i].rx_page[j].write_offset_dma;
906
907                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
908                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
909                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
910                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
911                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
912                 }
913         }
914         /* Page Length */
915         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
916         /* Load all of base address above */
917         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
918
919         return;
920 }
921
922 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
923 {
924         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
925         u32 dev_ctrl_data = 0;
926         u32 max_pay_load = 0;
927         u32 jumbo_thresh = 0;
928         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
929
930         /* configure TXQ param */
931         if (hw->nic_type != athr_l2e_revB) {
932                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
933                 if (hw->max_frame_size <= 1500) {
934                         jumbo_thresh = hw->max_frame_size + extra_size;
935                 } else if (hw->max_frame_size < 6*1024) {
936                         jumbo_thresh =
937                                 (hw->max_frame_size + extra_size) * 2 / 3;
938                 } else {
939                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
940                 }
941                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
942         }
943
944         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
945
946         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
947                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
948
949         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
950
951         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
952                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
953         hw->dmar_block = min(max_pay_load, hw->dmar_block);
954
955         if (hw->nic_type != athr_l2e_revB)
956                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
957                               atl1e_pay_load_size[hw->dmar_block]);
958         /* enable TXQ */
959         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
960                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
961                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
962                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
963         return;
964 }
965
966 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
967 {
968         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
969         u32 rxf_len  = 0;
970         u32 rxf_low  = 0;
971         u32 rxf_high = 0;
972         u32 rxf_thresh_data = 0;
973         u32 rxq_ctrl_data = 0;
974
975         if (hw->nic_type != athr_l2e_revB) {
976                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
977                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
978                               RXQ_JMBOSZ_TH_SHIFT |
979                               (1 & RXQ_JMBO_LKAH_MASK) <<
980                               RXQ_JMBO_LKAH_SHIFT));
981
982                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
983                 rxf_high = rxf_len * 4 / 5;
984                 rxf_low  = rxf_len / 5;
985                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
986                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
987                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
988                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
989
990                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
991         }
992
993         /* RRS */
994         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
995         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
996
997         if (hw->rrs_type & atl1e_rrs_ipv4)
998                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
999
1000         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1001                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1002
1003         if (hw->rrs_type & atl1e_rrs_ipv6)
1004                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1005
1006         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1007                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1008
1009         if (hw->rrs_type != atl1e_rrs_disable)
1010                 rxq_ctrl_data |=
1011                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1012
1013         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1014                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1015
1016         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1017         return;
1018 }
1019
1020 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1021 {
1022         struct atl1e_hw *hw = &adapter->hw;
1023         u32 dma_ctrl_data = 0;
1024
1025         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1026         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1027                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1028         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1029                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1030         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1031         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1032                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1033         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1034                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1035
1036         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1037         return;
1038 }
1039
1040 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1041 {
1042         u32 value;
1043         struct atl1e_hw *hw = &adapter->hw;
1044         struct net_device *netdev = adapter->netdev;
1045
1046         /* Config MAC CTRL Register */
1047         value = MAC_CTRL_TX_EN |
1048                 MAC_CTRL_RX_EN ;
1049
1050         if (FULL_DUPLEX == adapter->link_duplex)
1051                 value |= MAC_CTRL_DUPLX;
1052
1053         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1054                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1055                           MAC_CTRL_SPEED_SHIFT);
1056         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1057
1058         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1059         value |= (((u32)adapter->hw.preamble_len &
1060                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1061
1062         if (adapter->vlgrp)
1063                 value |= MAC_CTRL_RMV_VLAN;
1064
1065         value |= MAC_CTRL_BC_EN;
1066         if (netdev->flags & IFF_PROMISC)
1067                 value |= MAC_CTRL_PROMIS_EN;
1068         if (netdev->flags & IFF_ALLMULTI)
1069                 value |= MAC_CTRL_MC_ALL_EN;
1070
1071         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1072 }
1073
1074 /*
1075  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1076  * @adapter: board private structure
1077  *
1078  * Configure the Tx /Rx unit of the MAC after a reset.
1079  */
1080 static int atl1e_configure(struct atl1e_adapter *adapter)
1081 {
1082         struct atl1e_hw *hw = &adapter->hw;
1083         struct pci_dev *pdev = adapter->pdev;
1084
1085         u32 intr_status_data = 0;
1086
1087         /* clear interrupt status */
1088         AT_WRITE_REG(hw, REG_ISR, ~0);
1089
1090         /* 1. set MAC Address */
1091         atl1e_hw_set_mac_addr(hw);
1092
1093         /* 2. Init the Multicast HASH table done by set_muti */
1094
1095         /* 3. Clear any WOL status */
1096         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1097
1098         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1099          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1100          *    High 32bits memory */
1101         atl1e_configure_des_ring(adapter);
1102
1103         /* 5. set Interrupt Moderator Timer */
1104         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1105         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1106         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1107                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1108
1109         /* 6. rx/tx threshold to trig interrupt */
1110         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1111         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1112         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1113         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1114
1115         /* 7. set Interrupt Clear Timer */
1116         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1117
1118         /* 8. set MTU */
1119         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1120                         VLAN_HLEN + ETH_FCS_LEN);
1121
1122         /* 9. config TXQ early tx threshold */
1123         atl1e_configure_tx(adapter);
1124
1125         /* 10. config RXQ */
1126         atl1e_configure_rx(adapter);
1127
1128         /* 11. config  DMA Engine */
1129         atl1e_configure_dma(adapter);
1130
1131         /* 12. smb timer to trig interrupt */
1132         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1133
1134         intr_status_data = AT_READ_REG(hw, REG_ISR);
1135         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1136                 dev_err(&pdev->dev, "atl1e_configure failed,"
1137                                 "PCIE phy link down\n");
1138                 return -1;
1139         }
1140
1141         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1142         return 0;
1143 }
1144
1145 /*
1146  * atl1e_get_stats - Get System Network Statistics
1147  * @netdev: network interface device structure
1148  *
1149  * Returns the address of the device statistics structure.
1150  * The statistics are actually updated from the timer callback.
1151  */
1152 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1153 {
1154         struct atl1e_adapter *adapter = netdev_priv(netdev);
1155         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1156         struct net_device_stats *net_stats = &adapter->net_stats;
1157
1158         net_stats->rx_packets = hw_stats->rx_ok;
1159         net_stats->tx_packets = hw_stats->tx_ok;
1160         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1161         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1162         net_stats->multicast  = hw_stats->rx_mcast;
1163         net_stats->collisions = hw_stats->tx_1_col +
1164                                 hw_stats->tx_2_col * 2 +
1165                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1166
1167         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1168                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1169                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1170         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1171         net_stats->rx_length_errors = hw_stats->rx_len_err;
1172         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1173         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1174         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1175
1176         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1177
1178         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1179                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1180         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1181         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1182         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1183
1184         return &adapter->net_stats;
1185 }
1186
1187 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1188 {
1189         u16 hw_reg_addr = 0;
1190         unsigned long *stats_item = NULL;
1191
1192         /* update rx status */
1193         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1194         stats_item  = &adapter->hw_stats.rx_ok;
1195         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1196                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1197                 stats_item++;
1198                 hw_reg_addr += 4;
1199         }
1200         /* update tx status */
1201         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1202         stats_item  = &adapter->hw_stats.tx_ok;
1203         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1204                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1205                 stats_item++;
1206                 hw_reg_addr += 4;
1207         }
1208 }
1209
1210 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1211 {
1212         u16 phy_data;
1213
1214         spin_lock(&adapter->mdio_lock);
1215         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1216         spin_unlock(&adapter->mdio_lock);
1217 }
1218
1219 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1220 {
1221         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1222                                         &adapter->tx_ring;
1223         struct atl1e_tx_buffer *tx_buffer = NULL;
1224         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1225         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1226
1227         while (next_to_clean != hw_next_to_clean) {
1228                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1229                 if (tx_buffer->dma) {
1230                         pci_unmap_page(adapter->pdev, tx_buffer->dma,
1231                                         tx_buffer->length, PCI_DMA_TODEVICE);
1232                         tx_buffer->dma = 0;
1233                 }
1234
1235                 if (tx_buffer->skb) {
1236                         dev_kfree_skb_irq(tx_buffer->skb);
1237                         tx_buffer->skb = NULL;
1238                 }
1239
1240                 if (++next_to_clean == tx_ring->count)
1241                         next_to_clean = 0;
1242         }
1243
1244         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1245
1246         if (netif_queue_stopped(adapter->netdev) &&
1247                         netif_carrier_ok(adapter->netdev)) {
1248                 netif_wake_queue(adapter->netdev);
1249         }
1250
1251         return true;
1252 }
1253
1254 /*
1255  * atl1e_intr - Interrupt Handler
1256  * @irq: interrupt number
1257  * @data: pointer to a network interface device structure
1258  * @pt_regs: CPU registers structure
1259  */
1260 static irqreturn_t atl1e_intr(int irq, void *data)
1261 {
1262         struct net_device *netdev  = data;
1263         struct atl1e_adapter *adapter = netdev_priv(netdev);
1264         struct pci_dev *pdev = adapter->pdev;
1265         struct atl1e_hw *hw = &adapter->hw;
1266         int max_ints = AT_MAX_INT_WORK;
1267         int handled = IRQ_NONE;
1268         u32 status;
1269
1270         do {
1271                 status = AT_READ_REG(hw, REG_ISR);
1272                 if ((status & IMR_NORMAL_MASK) == 0 ||
1273                                 (status & ISR_DIS_INT) != 0) {
1274                         if (max_ints != AT_MAX_INT_WORK)
1275                                 handled = IRQ_HANDLED;
1276                         break;
1277                 }
1278                 /* link event */
1279                 if (status & ISR_GPHY)
1280                         atl1e_clear_phy_int(adapter);
1281                 /* Ack ISR */
1282                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1283
1284                 handled = IRQ_HANDLED;
1285                 /* check if PCIE PHY Link down */
1286                 if (status & ISR_PHY_LINKDOWN) {
1287                         dev_err(&pdev->dev,
1288                                 "pcie phy linkdown %x\n", status);
1289                         if (netif_running(adapter->netdev)) {
1290                                 /* reset MAC */
1291                                 atl1e_irq_reset(adapter);
1292                                 schedule_work(&adapter->reset_task);
1293                                 break;
1294                         }
1295                 }
1296
1297                 /* check if DMA read/write error */
1298                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1299                         dev_err(&pdev->dev,
1300                                 "PCIE DMA RW error (status = 0x%x)\n",
1301                                 status);
1302                         atl1e_irq_reset(adapter);
1303                         schedule_work(&adapter->reset_task);
1304                         break;
1305                 }
1306
1307                 if (status & ISR_SMB)
1308                         atl1e_update_hw_stats(adapter);
1309
1310                 /* link event */
1311                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1312                         adapter->net_stats.tx_carrier_errors++;
1313                         atl1e_link_chg_event(adapter);
1314                         break;
1315                 }
1316
1317                 /* transmit event */
1318                 if (status & ISR_TX_EVENT)
1319                         atl1e_clean_tx_irq(adapter);
1320
1321                 if (status & ISR_RX_EVENT) {
1322                         /*
1323                          * disable rx interrupts, without
1324                          * the synchronize_irq bit
1325                          */
1326                         AT_WRITE_REG(hw, REG_IMR,
1327                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1328                         AT_WRITE_FLUSH(hw);
1329                         if (likely(netif_rx_schedule_prep(netdev,
1330                                    &adapter->napi)))
1331                                 __netif_rx_schedule(netdev, &adapter->napi);
1332                 }
1333         } while (--max_ints > 0);
1334         /* re-enable Interrupt*/
1335         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1336
1337         return handled;
1338 }
1339
1340 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1341                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1342 {
1343         u8 *packet = (u8 *)(prrs + 1);
1344         struct iphdr *iph;
1345         u16 head_len = ETH_HLEN;
1346         u16 pkt_flags;
1347         u16 err_flags;
1348
1349         skb->ip_summed = CHECKSUM_NONE;
1350         pkt_flags = prrs->pkt_flag;
1351         err_flags = prrs->err_flag;
1352         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1353                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1354                 if (pkt_flags & RRS_IS_IPV4) {
1355                         if (pkt_flags & RRS_IS_802_3)
1356                                 head_len += 8;
1357                         iph = (struct iphdr *) (packet + head_len);
1358                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1359                                 goto hw_xsum;
1360                 }
1361                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1362                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1363                         return;
1364                 }
1365         }
1366
1367 hw_xsum :
1368         return;
1369 }
1370
1371 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1372                                                u8 que)
1373 {
1374         struct atl1e_rx_page_desc *rx_page_desc =
1375                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1376         u8 rx_using = rx_page_desc[que].rx_using;
1377
1378         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1379 }
1380
1381 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1382                    int *work_done, int work_to_do)
1383 {
1384         struct pci_dev *pdev = adapter->pdev;
1385         struct net_device *netdev  = adapter->netdev;
1386         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1387                                          &adapter->rx_ring;
1388         struct atl1e_rx_page_desc *rx_page_desc =
1389                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1390         struct sk_buff *skb = NULL;
1391         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1392         u32 packet_size, write_offset;
1393         struct atl1e_recv_ret_status *prrs;
1394
1395         write_offset = *(rx_page->write_offset_addr);
1396         if (likely(rx_page->read_offset < write_offset)) {
1397                 do {
1398                         if (*work_done >= work_to_do)
1399                                 break;
1400                         (*work_done)++;
1401                         /* get new packet's  rrs */
1402                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1403                                                  rx_page->read_offset);
1404                         /* check sequence number */
1405                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1406                                 dev_err(&pdev->dev,
1407                                         "rx sequence number"
1408                                         " error (rx=%d) (expect=%d)\n",
1409                                         prrs->seq_num,
1410                                         rx_page_desc[que].rx_nxseq);
1411                                 rx_page_desc[que].rx_nxseq++;
1412                                 /* just for debug use */
1413                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1414                                              (((u32)prrs->seq_num) << 16) |
1415                                              rx_page_desc[que].rx_nxseq);
1416                                 goto fatal_err;
1417                         }
1418                         rx_page_desc[que].rx_nxseq++;
1419
1420                         /* error packet */
1421                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1422                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1423                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1424                                         RRS_ERR_TRUNC)) {
1425                                 /* hardware error, discard this packet*/
1426                                         dev_err(&pdev->dev,
1427                                                 "rx packet desc error %x\n",
1428                                                 *((u32 *)prrs + 1));
1429                                         goto skip_pkt;
1430                                 }
1431                         }
1432
1433                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1434                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1435                         skb = netdev_alloc_skb(netdev,
1436                                                packet_size + NET_IP_ALIGN);
1437                         if (skb == NULL) {
1438                                 dev_warn(&pdev->dev, "%s: Memory squeeze,"
1439                                         "deferring packet.\n", netdev->name);
1440                                 goto skip_pkt;
1441                         }
1442                         skb_reserve(skb, NET_IP_ALIGN);
1443                         skb->dev = netdev;
1444                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1445                         skb_put(skb, packet_size);
1446                         skb->protocol = eth_type_trans(skb, netdev);
1447                         atl1e_rx_checksum(adapter, skb, prrs);
1448
1449                         if (unlikely(adapter->vlgrp &&
1450                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1451                                 u16 vlan_tag = (prrs->vtag >> 4) |
1452                                                ((prrs->vtag & 7) << 13) |
1453                                                ((prrs->vtag & 8) << 9);
1454                                 dev_dbg(&pdev->dev,
1455                                         "RXD VLAN TAG<RRD>=0x%04x\n",
1456                                         prrs->vtag);
1457                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1458                                                          vlan_tag);
1459                         } else {
1460                                 netif_receive_skb(skb);
1461                         }
1462
1463 skip_pkt:
1464         /* skip current packet whether it's ok or not. */
1465                         rx_page->read_offset +=
1466                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1467                                 RRS_PKT_SIZE_MASK) +
1468                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1469                                                 0xFFFFFFE0);
1470
1471                         if (rx_page->read_offset >= rx_ring->page_size) {
1472                                 /* mark this page clean */
1473                                 u16 reg_addr;
1474                                 u8  rx_using;
1475
1476                                 rx_page->read_offset =
1477                                         *(rx_page->write_offset_addr) = 0;
1478                                 rx_using = rx_page_desc[que].rx_using;
1479                                 reg_addr =
1480                                         atl1e_rx_page_vld_regs[que][rx_using];
1481                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1482                                 rx_page_desc[que].rx_using ^= 1;
1483                                 rx_page = atl1e_get_rx_page(adapter, que);
1484                         }
1485                         write_offset = *(rx_page->write_offset_addr);
1486                 } while (rx_page->read_offset < write_offset);
1487         }
1488
1489         return;
1490
1491 fatal_err:
1492         if (!test_bit(__AT_DOWN, &adapter->flags))
1493                 schedule_work(&adapter->reset_task);
1494 }
1495
1496 /*
1497  * atl1e_clean - NAPI Rx polling callback
1498  * @adapter: board private structure
1499  */
1500 static int atl1e_clean(struct napi_struct *napi, int budget)
1501 {
1502         struct atl1e_adapter *adapter =
1503                         container_of(napi, struct atl1e_adapter, napi);
1504         struct net_device *netdev  = adapter->netdev;
1505         struct pci_dev    *pdev    = adapter->pdev;
1506         u32 imr_data;
1507         int work_done = 0;
1508
1509         /* Keep link state information with original netdev */
1510         if (!netif_carrier_ok(adapter->netdev))
1511                 goto quit_polling;
1512
1513         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1514
1515         /* If no Tx and not enough Rx work done, exit the polling mode */
1516         if (work_done < budget) {
1517 quit_polling:
1518                 netif_rx_complete(netdev, napi);
1519                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1520                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1521                 /* test debug */
1522                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1523                         atomic_dec(&adapter->irq_sem);
1524                         dev_err(&pdev->dev,
1525                                 "atl1e_clean is called when AT_DOWN\n");
1526                 }
1527                 /* reenable RX intr */
1528                 /*atl1e_irq_enable(adapter); */
1529
1530         }
1531         return work_done;
1532 }
1533
1534 #ifdef CONFIG_NET_POLL_CONTROLLER
1535
1536 /*
1537  * Polling 'interrupt' - used by things like netconsole to send skbs
1538  * without having to re-enable interrupts. It's not called while
1539  * the interrupt routine is executing.
1540  */
1541 static void atl1e_netpoll(struct net_device *netdev)
1542 {
1543         struct atl1e_adapter *adapter = netdev_priv(netdev);
1544
1545         disable_irq(adapter->pdev->irq);
1546         atl1e_intr(adapter->pdev->irq, netdev);
1547         enable_irq(adapter->pdev->irq);
1548 }
1549 #endif
1550
1551 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1552 {
1553         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1554         u16 next_to_use = 0;
1555         u16 next_to_clean = 0;
1556
1557         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1558         next_to_use   = tx_ring->next_to_use;
1559
1560         return (u16)(next_to_clean > next_to_use) ?
1561                 (next_to_clean - next_to_use - 1) :
1562                 (tx_ring->count + next_to_clean - next_to_use - 1);
1563 }
1564
1565 /*
1566  * get next usable tpd
1567  * Note: should call atl1e_tdp_avail to make sure
1568  * there is enough tpd to use
1569  */
1570 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1571 {
1572         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1573         u16 next_to_use = 0;
1574
1575         next_to_use = tx_ring->next_to_use;
1576         if (++tx_ring->next_to_use == tx_ring->count)
1577                 tx_ring->next_to_use = 0;
1578
1579         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1580         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1581 }
1582
1583 static struct atl1e_tx_buffer *
1584 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1585 {
1586         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1587
1588         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1589 }
1590
1591 /* Calculate the transmit packet descript needed*/
1592 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1593 {
1594         int i = 0;
1595         u16 tpd_req = 1;
1596         u16 fg_size = 0;
1597         u16 proto_hdr_len = 0;
1598
1599         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1600                 fg_size = skb_shinfo(skb)->frags[i].size;
1601                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1602         }
1603
1604         if (skb_is_gso(skb)) {
1605                 if (skb->protocol == ntohs(ETH_P_IP) ||
1606                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1607                         proto_hdr_len = skb_transport_offset(skb) +
1608                                         tcp_hdrlen(skb);
1609                         if (proto_hdr_len < skb_headlen(skb)) {
1610                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1611                                            MAX_TX_BUF_LEN - 1) >>
1612                                            MAX_TX_BUF_SHIFT);
1613                         }
1614                 }
1615
1616         }
1617         return tpd_req;
1618 }
1619
1620 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1621                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1622 {
1623         struct pci_dev *pdev = adapter->pdev;
1624         u8 hdr_len;
1625         u32 real_len;
1626         unsigned short offload_type;
1627         int err;
1628
1629         if (skb_is_gso(skb)) {
1630                 if (skb_header_cloned(skb)) {
1631                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1632                         if (unlikely(err))
1633                                 return -1;
1634                 }
1635                 offload_type = skb_shinfo(skb)->gso_type;
1636
1637                 if (offload_type & SKB_GSO_TCPV4) {
1638                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1639                                         + ntohs(ip_hdr(skb)->tot_len));
1640
1641                         if (real_len < skb->len)
1642                                 pskb_trim(skb, real_len);
1643
1644                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1645                         if (unlikely(skb->len == hdr_len)) {
1646                                 /* only xsum need */
1647                                 dev_warn(&pdev->dev,
1648                                       "IPV4 tso with zero data??\n");
1649                                 goto check_sum;
1650                         } else {
1651                                 ip_hdr(skb)->check = 0;
1652                                 ip_hdr(skb)->tot_len = 0;
1653                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1654                                                         ip_hdr(skb)->saddr,
1655                                                         ip_hdr(skb)->daddr,
1656                                                         0, IPPROTO_TCP, 0);
1657                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1658                                         TDP_V4_IPHL_MASK) <<
1659                                         TPD_V4_IPHL_SHIFT;
1660                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1661                                         TPD_TCPHDRLEN_MASK) <<
1662                                         TPD_TCPHDRLEN_SHIFT;
1663                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1664                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1665                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1666                         }
1667                         return 0;
1668                 }
1669
1670                 if (offload_type & SKB_GSO_TCPV6) {
1671                         real_len = (((unsigned char *)ipv6_hdr(skb) - skb->data)
1672                                         + ntohs(ipv6_hdr(skb)->payload_len));
1673                         if (real_len < skb->len)
1674                                 pskb_trim(skb, real_len);
1675
1676                         /* check payload == 0 byte ? */
1677                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1678                         if (unlikely(skb->len == hdr_len)) {
1679                                 /* only xsum need */
1680                                 dev_warn(&pdev->dev,
1681                                         "IPV6 tso with zero data??\n");
1682                                 goto check_sum;
1683                         } else {
1684                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1685                                                 &ipv6_hdr(skb)->saddr,
1686                                                 &ipv6_hdr(skb)->daddr,
1687                                                 0, IPPROTO_TCP, 0);
1688                                 tpd->word3 |= 1 << TPD_IP_VERSION_SHIFT;
1689                                 hdr_len >>= 1;
1690                                 tpd->word3 |= (hdr_len & TPD_V6_IPHLLO_MASK) <<
1691                                         TPD_V6_IPHLLO_SHIFT;
1692                                 tpd->word3 |= ((hdr_len >> 3) &
1693                                         TPD_V6_IPHLHI_MASK) <<
1694                                         TPD_V6_IPHLHI_SHIFT;
1695                                 tpd->word3 |= (tcp_hdrlen(skb) >> 2 &
1696                                         TPD_TCPHDRLEN_MASK) <<
1697                                         TPD_TCPHDRLEN_SHIFT;
1698                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1699                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1700                                         tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1701                         }
1702                 }
1703                 return 0;
1704         }
1705
1706 check_sum:
1707         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1708                 u8 css, cso;
1709
1710                 cso = skb_transport_offset(skb);
1711                 if (unlikely(cso & 0x1)) {
1712                         dev_err(&adapter->pdev->dev,
1713                            "pay load offset should not ant event number\n");
1714                         return -1;
1715                 } else {
1716                         css = cso + skb->csum_offset;
1717                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1718                                         TPD_PLOADOFFSET_SHIFT;
1719                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1720                                         TPD_CCSUMOFFSET_SHIFT;
1721                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1722                 }
1723         }
1724
1725         return 0;
1726 }
1727
1728 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1729                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1730 {
1731         struct atl1e_tpd_desc *use_tpd = NULL;
1732         struct atl1e_tx_buffer *tx_buffer = NULL;
1733         u16 buf_len = skb->len - skb->data_len;
1734         u16 map_len = 0;
1735         u16 mapped_len = 0;
1736         u16 hdr_len = 0;
1737         u16 nr_frags;
1738         u16 f;
1739         int segment;
1740
1741         nr_frags = skb_shinfo(skb)->nr_frags;
1742         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1743         if (segment) {
1744                 /* TSO */
1745                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1746                 use_tpd = tpd;
1747
1748                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1749                 tx_buffer->length = map_len;
1750                 tx_buffer->dma = pci_map_single(adapter->pdev,
1751                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1752                 mapped_len += map_len;
1753                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1754                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1755                         ((cpu_to_le32(tx_buffer->length) &
1756                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1757         }
1758
1759         while (mapped_len < buf_len) {
1760                 /* mapped_len == 0, means we should use the first tpd,
1761                    which is given by caller  */
1762                 if (mapped_len == 0) {
1763                         use_tpd = tpd;
1764                 } else {
1765                         use_tpd = atl1e_get_tpd(adapter);
1766                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1767                 }
1768                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1769                 tx_buffer->skb = NULL;
1770
1771                 tx_buffer->length = map_len =
1772                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1773                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1774                 tx_buffer->dma =
1775                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1776                                         map_len, PCI_DMA_TODEVICE);
1777                 mapped_len  += map_len;
1778                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1779                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1780                         ((cpu_to_le32(tx_buffer->length) &
1781                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1782         }
1783
1784         for (f = 0; f < nr_frags; f++) {
1785                 struct skb_frag_struct *frag;
1786                 u16 i;
1787                 u16 seg_num;
1788
1789                 frag = &skb_shinfo(skb)->frags[f];
1790                 buf_len = frag->size;
1791
1792                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1793                 for (i = 0; i < seg_num; i++) {
1794                         use_tpd = atl1e_get_tpd(adapter);
1795                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1796
1797                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1798                         if (tx_buffer->skb)
1799                                 BUG();
1800
1801                         tx_buffer->skb = NULL;
1802                         tx_buffer->length =
1803                                 (buf_len > MAX_TX_BUF_LEN) ?
1804                                 MAX_TX_BUF_LEN : buf_len;
1805                         buf_len -= tx_buffer->length;
1806
1807                         tx_buffer->dma =
1808                                 pci_map_page(adapter->pdev, frag->page,
1809                                                 frag->page_offset +
1810                                                 (i * MAX_TX_BUF_LEN),
1811                                                 tx_buffer->length,
1812                                                 PCI_DMA_TODEVICE);
1813                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1814                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1815                                         ((cpu_to_le32(tx_buffer->length) &
1816                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1817                 }
1818         }
1819
1820         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1821                 /* note this one is a tcp header */
1822                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1823         /* The last tpd */
1824
1825         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1826         /* The last buffer info contain the skb address,
1827            so it will be free after unmap */
1828         tx_buffer->skb = skb;
1829 }
1830
1831 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1832                            struct atl1e_tpd_desc *tpd)
1833 {
1834         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1835         /* Force memory writes to complete before letting h/w
1836          * know there are new descriptors to fetch.  (Only
1837          * applicable for weak-ordered memory model archs,
1838          * such as IA-64). */
1839         wmb();
1840         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1841 }
1842
1843 static int atl1e_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1844 {
1845         struct atl1e_adapter *adapter = netdev_priv(netdev);
1846         unsigned long flags;
1847         u16 tpd_req = 1;
1848         struct atl1e_tpd_desc *tpd;
1849
1850         if (test_bit(__AT_DOWN, &adapter->flags)) {
1851                 dev_kfree_skb_any(skb);
1852                 return NETDEV_TX_OK;
1853         }
1854
1855         if (unlikely(skb->len <= 0)) {
1856                 dev_kfree_skb_any(skb);
1857                 return NETDEV_TX_OK;
1858         }
1859         tpd_req = atl1e_cal_tdp_req(skb);
1860         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1861                 return NETDEV_TX_LOCKED;
1862
1863         if (atl1e_tpd_avail(adapter) < tpd_req) {
1864                 /* no enough descriptor, just stop queue */
1865                 netif_stop_queue(netdev);
1866                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1867                 return NETDEV_TX_BUSY;
1868         }
1869
1870         tpd = atl1e_get_tpd(adapter);
1871
1872         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1873                 u16 vlan_tag = vlan_tx_tag_get(skb);
1874                 u16 atl1e_vlan_tag;
1875
1876                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1877                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1878                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1879                                 TPD_VLAN_SHIFT;
1880         }
1881
1882         if (skb->protocol == ntohs(ETH_P_8021Q))
1883                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1884
1885         if (skb_network_offset(skb) != ETH_HLEN)
1886                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1887
1888         /* do TSO and check sum */
1889         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1890                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1891                 dev_kfree_skb_any(skb);
1892                 return NETDEV_TX_OK;
1893         }
1894
1895         atl1e_tx_map(adapter, skb, tpd);
1896         atl1e_tx_queue(adapter, tpd_req, tpd);
1897
1898         netdev->trans_start = jiffies;
1899         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1900         return NETDEV_TX_OK;
1901 }
1902
1903 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1904 {
1905         struct net_device *netdev = adapter->netdev;
1906
1907         free_irq(adapter->pdev->irq, netdev);
1908
1909         if (adapter->have_msi)
1910                 pci_disable_msi(adapter->pdev);
1911 }
1912
1913 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1914 {
1915         struct pci_dev    *pdev   = adapter->pdev;
1916         struct net_device *netdev = adapter->netdev;
1917         int flags = 0;
1918         int err = 0;
1919
1920         adapter->have_msi = true;
1921         err = pci_enable_msi(adapter->pdev);
1922         if (err) {
1923                 dev_dbg(&pdev->dev,
1924                         "Unable to allocate MSI interrupt Error: %d\n", err);
1925                 adapter->have_msi = false;
1926         } else
1927                 netdev->irq = pdev->irq;
1928
1929
1930         if (!adapter->have_msi)
1931                 flags |= IRQF_SHARED;
1932         err = request_irq(adapter->pdev->irq, &atl1e_intr, flags,
1933                         netdev->name, netdev);
1934         if (err) {
1935                 dev_dbg(&pdev->dev,
1936                         "Unable to allocate interrupt Error: %d\n", err);
1937                 if (adapter->have_msi)
1938                         pci_disable_msi(adapter->pdev);
1939                 return err;
1940         }
1941         dev_dbg(&pdev->dev, "atl1e_request_irq OK\n");
1942         return err;
1943 }
1944
1945 int atl1e_up(struct atl1e_adapter *adapter)
1946 {
1947         struct net_device *netdev = adapter->netdev;
1948         int err = 0;
1949         u32 val;
1950
1951         /* hardware has been reset, we need to reload some things */
1952         err = atl1e_init_hw(&adapter->hw);
1953         if (err) {
1954                 err = -EIO;
1955                 return err;
1956         }
1957         atl1e_init_ring_ptrs(adapter);
1958         atl1e_set_multi(netdev);
1959         atl1e_restore_vlan(adapter);
1960
1961         if (atl1e_configure(adapter)) {
1962                 err = -EIO;
1963                 goto err_up;
1964         }
1965
1966         clear_bit(__AT_DOWN, &adapter->flags);
1967         napi_enable(&adapter->napi);
1968         atl1e_irq_enable(adapter);
1969         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1970         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1971                       val | MASTER_CTRL_MANUAL_INT);
1972
1973 err_up:
1974         return err;
1975 }
1976
1977 void atl1e_down(struct atl1e_adapter *adapter)
1978 {
1979         struct net_device *netdev = adapter->netdev;
1980
1981         /* signal that we're down so the interrupt handler does not
1982          * reschedule our watchdog timer */
1983         set_bit(__AT_DOWN, &adapter->flags);
1984
1985 #ifdef NETIF_F_LLTX
1986         netif_stop_queue(netdev);
1987 #else
1988         netif_tx_disable(netdev);
1989 #endif
1990
1991         /* reset MAC to disable all RX/TX */
1992         atl1e_reset_hw(&adapter->hw);
1993         msleep(1);
1994
1995         napi_disable(&adapter->napi);
1996         atl1e_del_timer(adapter);
1997         atl1e_irq_disable(adapter);
1998
1999         netif_carrier_off(netdev);
2000         adapter->link_speed = SPEED_0;
2001         adapter->link_duplex = -1;
2002         atl1e_clean_tx_ring(adapter);
2003         atl1e_clean_rx_ring(adapter);
2004 }
2005
2006 /*
2007  * atl1e_open - Called when a network interface is made active
2008  * @netdev: network interface device structure
2009  *
2010  * Returns 0 on success, negative value on failure
2011  *
2012  * The open entry point is called when a network interface is made
2013  * active by the system (IFF_UP).  At this point all resources needed
2014  * for transmit and receive operations are allocated, the interrupt
2015  * handler is registered with the OS, the watchdog timer is started,
2016  * and the stack is notified that the interface is ready.
2017  */
2018 static int atl1e_open(struct net_device *netdev)
2019 {
2020         struct atl1e_adapter *adapter = netdev_priv(netdev);
2021         int err;
2022
2023         /* disallow open during test */
2024         if (test_bit(__AT_TESTING, &adapter->flags))
2025                 return -EBUSY;
2026
2027         /* allocate rx/tx dma buffer & descriptors */
2028         atl1e_init_ring_resources(adapter);
2029         err = atl1e_setup_ring_resources(adapter);
2030         if (unlikely(err))
2031                 return err;
2032
2033         err = atl1e_request_irq(adapter);
2034         if (unlikely(err))
2035                 goto err_req_irq;
2036
2037         err = atl1e_up(adapter);
2038         if (unlikely(err))
2039                 goto err_up;
2040
2041         return 0;
2042
2043 err_up:
2044         atl1e_free_irq(adapter);
2045 err_req_irq:
2046         atl1e_free_ring_resources(adapter);
2047         atl1e_reset_hw(&adapter->hw);
2048
2049         return err;
2050 }
2051
2052 /*
2053  * atl1e_close - Disables a network interface
2054  * @netdev: network interface device structure
2055  *
2056  * Returns 0, this is not allowed to fail
2057  *
2058  * The close entry point is called when an interface is de-activated
2059  * by the OS.  The hardware is still under the drivers control, but
2060  * needs to be disabled.  A global MAC reset is issued to stop the
2061  * hardware, and all transmit and receive resources are freed.
2062  */
2063 static int atl1e_close(struct net_device *netdev)
2064 {
2065         struct atl1e_adapter *adapter = netdev_priv(netdev);
2066
2067         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2068         atl1e_down(adapter);
2069         atl1e_free_irq(adapter);
2070         atl1e_free_ring_resources(adapter);
2071
2072         return 0;
2073 }
2074
2075 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2076 {
2077         struct net_device *netdev = pci_get_drvdata(pdev);
2078         struct atl1e_adapter *adapter = netdev_priv(netdev);
2079         struct atl1e_hw *hw = &adapter->hw;
2080         u32 ctrl = 0;
2081         u32 mac_ctrl_data = 0;
2082         u32 wol_ctrl_data = 0;
2083         u16 mii_advertise_data = 0;
2084         u16 mii_bmsr_data = 0;
2085         u16 mii_intr_status_data = 0;
2086         u32 wufc = adapter->wol;
2087         u32 i;
2088 #ifdef CONFIG_PM
2089         int retval = 0;
2090 #endif
2091
2092         if (netif_running(netdev)) {
2093                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2094                 atl1e_down(adapter);
2095         }
2096         netif_device_detach(netdev);
2097
2098 #ifdef CONFIG_PM
2099         retval = pci_save_state(pdev);
2100         if (retval)
2101                 return retval;
2102 #endif
2103
2104         if (wufc) {
2105                 /* get link status */
2106                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2107                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2108
2109                 mii_advertise_data = MII_AR_10T_HD_CAPS;
2110
2111                 if ((atl1e_write_phy_reg(hw, MII_AT001_CR, 0) != 0) ||
2112                     (atl1e_write_phy_reg(hw,
2113                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2114                     (atl1e_phy_commit(hw)) != 0) {
2115                         dev_dbg(&pdev->dev, "set phy register failed\n");
2116                         goto wol_dis;
2117                 }
2118
2119                 hw->phy_configured = false; /* re-init PHY when resume */
2120
2121                 /* turn on magic packet wol */
2122                 if (wufc & AT_WUFC_MAG)
2123                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2124
2125                 if (wufc & AT_WUFC_LNKC) {
2126                 /* if orignal link status is link, just wait for retrive link */
2127                         if (mii_bmsr_data & BMSR_LSTATUS) {
2128                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2129                                         msleep(100);
2130                                         atl1e_read_phy_reg(hw, MII_BMSR,
2131                                                         (u16 *)&mii_bmsr_data);
2132                                         if (mii_bmsr_data & BMSR_LSTATUS)
2133                                                 break;
2134                                 }
2135
2136                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2137                                         dev_dbg(&pdev->dev,
2138                                                 "%s: Link may change"
2139                                                 "when suspend\n",
2140                                                 atl1e_driver_name);
2141                         }
2142                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2143                         /* only link up can wake up */
2144                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2145                                 dev_dbg(&pdev->dev, "%s: read write phy "
2146                                                   "register failed.\n",
2147                                                   atl1e_driver_name);
2148                                 goto wol_dis;
2149                         }
2150                 }
2151                 /* clear phy interrupt */
2152                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2153                 /* Config MAC Ctrl register */
2154                 mac_ctrl_data = MAC_CTRL_RX_EN;
2155                 /* set to 10/100M halt duplex */
2156                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2157                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2158                                  MAC_CTRL_PRMLEN_MASK) <<
2159                                  MAC_CTRL_PRMLEN_SHIFT);
2160
2161                 if (adapter->vlgrp)
2162                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2163
2164                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2165                 if (wufc & AT_WUFC_MAG)
2166                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2167
2168                 dev_dbg(&pdev->dev,
2169                         "%s: suspend MAC=0x%x\n",
2170                         atl1e_driver_name, mac_ctrl_data);
2171
2172                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2173                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2174                 /* pcie patch */
2175                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2176                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2177                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2178                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2179                 goto suspend_exit;
2180         }
2181 wol_dis:
2182
2183         /* WOL disabled */
2184         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2185
2186         /* pcie patch */
2187         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2188         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2189         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2190
2191         atl1e_force_ps(hw);
2192         hw->phy_configured = false; /* re-init PHY when resume */
2193
2194         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2195
2196 suspend_exit:
2197
2198         if (netif_running(netdev))
2199                 atl1e_free_irq(adapter);
2200
2201         pci_disable_device(pdev);
2202
2203         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2204
2205         return 0;
2206 }
2207
2208 #ifdef CONFIG_PM
2209 static int atl1e_resume(struct pci_dev *pdev)
2210 {
2211         struct net_device *netdev = pci_get_drvdata(pdev);
2212         struct atl1e_adapter *adapter = netdev_priv(netdev);
2213         u32 err;
2214
2215         pci_set_power_state(pdev, PCI_D0);
2216         pci_restore_state(pdev);
2217
2218         err = pci_enable_device(pdev);
2219         if (err) {
2220                 dev_err(&pdev->dev, "ATL1e: Cannot enable PCI"
2221                                 " device from suspend\n");
2222                 return err;
2223         }
2224
2225         pci_set_master(pdev);
2226
2227         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2228
2229         pci_enable_wake(pdev, PCI_D3hot, 0);
2230         pci_enable_wake(pdev, PCI_D3cold, 0);
2231
2232         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2233
2234         if (netif_running(netdev)) {
2235                 err = atl1e_request_irq(adapter);
2236                 if (err)
2237                         return err;
2238         }
2239
2240         atl1e_reset_hw(&adapter->hw);
2241
2242         if (netif_running(netdev))
2243                 atl1e_up(adapter);
2244
2245         netif_device_attach(netdev);
2246
2247         return 0;
2248 }
2249 #endif
2250
2251 static void atl1e_shutdown(struct pci_dev *pdev)
2252 {
2253         atl1e_suspend(pdev, PMSG_SUSPEND);
2254 }
2255
2256 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2257 {
2258         SET_NETDEV_DEV(netdev, &pdev->dev);
2259         pci_set_drvdata(pdev, netdev);
2260
2261         netdev->irq  = pdev->irq;
2262         netdev->open = &atl1e_open;
2263         netdev->stop = &atl1e_close;
2264         netdev->hard_start_xmit = &atl1e_xmit_frame;
2265         netdev->get_stats = &atl1e_get_stats;
2266         netdev->set_multicast_list = &atl1e_set_multi;
2267         netdev->set_mac_address = &atl1e_set_mac_addr;
2268         netdev->change_mtu = &atl1e_change_mtu;
2269         netdev->do_ioctl = &atl1e_ioctl;
2270         netdev->tx_timeout = &atl1e_tx_timeout;
2271         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2272         netdev->vlan_rx_register = atl1e_vlan_rx_register;
2273 #ifdef CONFIG_NET_POLL_CONTROLLER
2274         netdev->poll_controller = atl1e_netpoll;
2275 #endif
2276         atl1e_set_ethtool_ops(netdev);
2277
2278         netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM |
2279                 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2280         netdev->features |= NETIF_F_LLTX;
2281         netdev->features |= NETIF_F_TSO;
2282         netdev->features |= NETIF_F_TSO6;
2283
2284         return 0;
2285 }
2286
2287 /*
2288  * atl1e_probe - Device Initialization Routine
2289  * @pdev: PCI device information struct
2290  * @ent: entry in atl1e_pci_tbl
2291  *
2292  * Returns 0 on success, negative on failure
2293  *
2294  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2295  * The OS initialization, configuring of the adapter private structure,
2296  * and a hardware reset occur.
2297  */
2298 static int __devinit atl1e_probe(struct pci_dev *pdev,
2299                                  const struct pci_device_id *ent)
2300 {
2301         struct net_device *netdev;
2302         struct atl1e_adapter *adapter = NULL;
2303         static int cards_found;
2304
2305         int err = 0;
2306
2307         err = pci_enable_device(pdev);
2308         if (err) {
2309                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2310                 return err;
2311         }
2312
2313         /*
2314          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2315          * shared register for the high 32 bits, so only a single, aligned,
2316          * 4 GB physical address range can be used at a time.
2317          *
2318          * Supporting 64-bit DMA on this hardware is more trouble than it's
2319          * worth.  It is far easier to limit to 32-bit DMA than update
2320          * various kernel subsystems to support the mechanics required by a
2321          * fixed-high-32-bit system.
2322          */
2323         if ((pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) ||
2324             (pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) != 0)) {
2325                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2326                 goto err_dma;
2327         }
2328
2329         err = pci_request_regions(pdev, atl1e_driver_name);
2330         if (err) {
2331                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2332                 goto err_pci_reg;
2333         }
2334
2335         pci_set_master(pdev);
2336
2337         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2338         if (netdev == NULL) {
2339                 err = -ENOMEM;
2340                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2341                 goto err_alloc_etherdev;
2342         }
2343
2344         err = atl1e_init_netdev(netdev, pdev);
2345         if (err) {
2346                 dev_err(&pdev->dev, "init netdevice failed\n");
2347                 goto err_init_netdev;
2348         }
2349         adapter = netdev_priv(netdev);
2350         adapter->bd_number = cards_found;
2351         adapter->netdev = netdev;
2352         adapter->pdev = pdev;
2353         adapter->hw.adapter = adapter;
2354         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2355         if (!adapter->hw.hw_addr) {
2356                 err = -EIO;
2357                 dev_err(&pdev->dev, "cannot map device registers\n");
2358                 goto err_ioremap;
2359         }
2360         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2361
2362         /* init mii data */
2363         adapter->mii.dev = netdev;
2364         adapter->mii.mdio_read  = atl1e_mdio_read;
2365         adapter->mii.mdio_write = atl1e_mdio_write;
2366         adapter->mii.phy_id_mask = 0x1f;
2367         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2368
2369         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2370
2371         init_timer(&adapter->phy_config_timer);
2372         adapter->phy_config_timer.function = &atl1e_phy_config;
2373         adapter->phy_config_timer.data = (unsigned long) adapter;
2374
2375         /* get user settings */
2376         atl1e_check_options(adapter);
2377         /*
2378          * Mark all PCI regions associated with PCI device
2379          * pdev as being reserved by owner atl1e_driver_name
2380          * Enables bus-mastering on the device and calls
2381          * pcibios_set_master to do the needed arch specific settings
2382          */
2383         atl1e_setup_pcicmd(pdev);
2384         /* setup the private structure */
2385         err = atl1e_sw_init(adapter);
2386         if (err) {
2387                 dev_err(&pdev->dev, "net device private data init failed\n");
2388                 goto err_sw_init;
2389         }
2390
2391         /* Init GPHY as early as possible due to power saving issue  */
2392         atl1e_phy_init(&adapter->hw);
2393         /* reset the controller to
2394          * put the device in a known good starting state */
2395         err = atl1e_reset_hw(&adapter->hw);
2396         if (err) {
2397                 err = -EIO;
2398                 goto err_reset;
2399         }
2400
2401         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2402                 err = -EIO;
2403                 dev_err(&pdev->dev, "get mac address failed\n");
2404                 goto err_eeprom;
2405         }
2406
2407         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2408         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2409         dev_dbg(&pdev->dev, "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2410                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2411                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2412                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2413
2414         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2415         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2416         err = register_netdev(netdev);
2417         if (err) {
2418                 dev_err(&pdev->dev, "register netdevice failed\n");
2419                 goto err_register;
2420         }
2421
2422         /* assume we have no link for now */
2423         netif_stop_queue(netdev);
2424         netif_carrier_off(netdev);
2425
2426         cards_found++;
2427
2428         return 0;
2429
2430 err_reset:
2431 err_register:
2432 err_sw_init:
2433 err_eeprom:
2434         iounmap(adapter->hw.hw_addr);
2435 err_init_netdev:
2436 err_ioremap:
2437         free_netdev(netdev);
2438 err_alloc_etherdev:
2439         pci_release_regions(pdev);
2440 err_pci_reg:
2441 err_dma:
2442         pci_disable_device(pdev);
2443         return err;
2444 }
2445
2446 /*
2447  * atl1e_remove - Device Removal Routine
2448  * @pdev: PCI device information struct
2449  *
2450  * atl1e_remove is called by the PCI subsystem to alert the driver
2451  * that it should release a PCI device.  The could be caused by a
2452  * Hot-Plug event, or because the driver is going to be removed from
2453  * memory.
2454  */
2455 static void __devexit atl1e_remove(struct pci_dev *pdev)
2456 {
2457         struct net_device *netdev = pci_get_drvdata(pdev);
2458         struct atl1e_adapter *adapter = netdev_priv(netdev);
2459
2460         /*
2461          * flush_scheduled work may reschedule our watchdog task, so
2462          * explicitly disable watchdog tasks from being rescheduled
2463          */
2464         set_bit(__AT_DOWN, &adapter->flags);
2465
2466         atl1e_del_timer(adapter);
2467         atl1e_cancel_work(adapter);
2468
2469         unregister_netdev(netdev);
2470         atl1e_free_ring_resources(adapter);
2471         atl1e_force_ps(&adapter->hw);
2472         iounmap(adapter->hw.hw_addr);
2473         pci_release_regions(pdev);
2474         free_netdev(netdev);
2475         pci_disable_device(pdev);
2476 }
2477
2478 /*
2479  * atl1e_io_error_detected - called when PCI error is detected
2480  * @pdev: Pointer to PCI device
2481  * @state: The current pci connection state
2482  *
2483  * This function is called after a PCI bus error affecting
2484  * this device has been detected.
2485  */
2486 static pci_ers_result_t
2487 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2488 {
2489         struct net_device *netdev = pci_get_drvdata(pdev);
2490         struct atl1e_adapter *adapter = netdev_priv(netdev);
2491
2492         netif_device_detach(netdev);
2493
2494         if (netif_running(netdev))
2495                 atl1e_down(adapter);
2496
2497         pci_disable_device(pdev);
2498
2499         /* Request a slot slot reset. */
2500         return PCI_ERS_RESULT_NEED_RESET;
2501 }
2502
2503 /*
2504  * atl1e_io_slot_reset - called after the pci bus has been reset.
2505  * @pdev: Pointer to PCI device
2506  *
2507  * Restart the card from scratch, as if from a cold-boot. Implementation
2508  * resembles the first-half of the e1000_resume routine.
2509  */
2510 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2511 {
2512         struct net_device *netdev = pci_get_drvdata(pdev);
2513         struct atl1e_adapter *adapter = netdev_priv(netdev);
2514
2515         if (pci_enable_device(pdev)) {
2516                 dev_err(&pdev->dev,
2517                        "ATL1e: Cannot re-enable PCI device after reset.\n");
2518                 return PCI_ERS_RESULT_DISCONNECT;
2519         }
2520         pci_set_master(pdev);
2521
2522         pci_enable_wake(pdev, PCI_D3hot, 0);
2523         pci_enable_wake(pdev, PCI_D3cold, 0);
2524
2525         atl1e_reset_hw(&adapter->hw);
2526
2527         return PCI_ERS_RESULT_RECOVERED;
2528 }
2529
2530 /*
2531  * atl1e_io_resume - called when traffic can start flowing again.
2532  * @pdev: Pointer to PCI device
2533  *
2534  * This callback is called when the error recovery driver tells us that
2535  * its OK to resume normal operation. Implementation resembles the
2536  * second-half of the atl1e_resume routine.
2537  */
2538 static void atl1e_io_resume(struct pci_dev *pdev)
2539 {
2540         struct net_device *netdev = pci_get_drvdata(pdev);
2541         struct atl1e_adapter *adapter = netdev_priv(netdev);
2542
2543         if (netif_running(netdev)) {
2544                 if (atl1e_up(adapter)) {
2545                         dev_err(&pdev->dev,
2546                           "ATL1e: can't bring device back up after reset\n");
2547                         return;
2548                 }
2549         }
2550
2551         netif_device_attach(netdev);
2552 }
2553
2554 static struct pci_error_handlers atl1e_err_handler = {
2555         .error_detected = atl1e_io_error_detected,
2556         .slot_reset = atl1e_io_slot_reset,
2557         .resume = atl1e_io_resume,
2558 };
2559
2560 static struct pci_driver atl1e_driver = {
2561         .name     = atl1e_driver_name,
2562         .id_table = atl1e_pci_tbl,
2563         .probe    = atl1e_probe,
2564         .remove   = __devexit_p(atl1e_remove),
2565         /* Power Managment Hooks */
2566 #ifdef CONFIG_PM
2567         .suspend  = atl1e_suspend,
2568         .resume   = atl1e_resume,
2569 #endif
2570         .shutdown = atl1e_shutdown,
2571         .err_handler = &atl1e_err_handler
2572 };
2573
2574 /*
2575  * atl1e_init_module - Driver Registration Routine
2576  *
2577  * atl1e_init_module is the first routine called when the driver is
2578  * loaded. All it does is register with the PCI subsystem.
2579  */
2580 static int __init atl1e_init_module(void)
2581 {
2582         return pci_register_driver(&atl1e_driver);
2583 }
2584
2585 /*
2586  * atl1e_exit_module - Driver Exit Cleanup Routine
2587  *
2588  * atl1e_exit_module is called just before the driver is removed
2589  * from memory.
2590  */
2591 static void __exit atl1e_exit_module(void)
2592 {
2593         pci_unregister_driver(&atl1e_driver);
2594 }
2595
2596 module_init(atl1e_init_module);
2597 module_exit(atl1e_exit_module);