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Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / ethernet / atheros / atl1e / atl1e_main.c
blob9dc6da039a6d90ac4137a70e94b2c3213c2a4741
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 const struct pci_device_id atl1e_pci_tbl[] = {
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
41 /* required last entry */
42 { 0 }
43 };
44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
45
46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(DRV_VERSION);
50
51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
52
53 static const u16
54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
55 {
56 {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
57 {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
58 {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
59 {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
60 };
61
62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
63 {
64 REG_RXF0_BASE_ADDR_HI,
65 REG_RXF1_BASE_ADDR_HI,
66 REG_RXF2_BASE_ADDR_HI,
67 REG_RXF3_BASE_ADDR_HI
68 };
69
70 static const u16
71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
72 {
73 {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
74 {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
75 {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
76 {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
77 };
78
79 static const u16
80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
81 {
82 {REG_HOST_RXF0_MB0_LO, REG_HOST_RXF0_MB1_LO},
83 {REG_HOST_RXF1_MB0_LO, REG_HOST_RXF1_MB1_LO},
84 {REG_HOST_RXF2_MB0_LO, REG_HOST_RXF2_MB1_LO},
85 {REG_HOST_RXF3_MB0_LO, REG_HOST_RXF3_MB1_LO}
86 };
87
88 static const u16 atl1e_pay_load_size[] = {
89 128, 256, 512, 1024, 2048, 4096,
90 };
91
92 /**
93 * atl1e_irq_enable - Enable default interrupt generation settings
94 * @adapter: board private structure
95 */
96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
97 {
98 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
99 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
100 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
101 AT_WRITE_FLUSH(&adapter->hw);
102 }
103 }
104
105 /**
106 * atl1e_irq_disable - Mask off interrupt generation on the NIC
107 * @adapter: board private structure
108 */
109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
110 {
111 atomic_inc(&adapter->irq_sem);
112 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
113 AT_WRITE_FLUSH(&adapter->hw);
114 synchronize_irq(adapter->pdev->irq);
115 }
116
117 /**
118 * atl1e_irq_reset - reset interrupt confiure on the NIC
119 * @adapter: board private structure
120 */
121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
122 {
123 atomic_set(&adapter->irq_sem, 0);
124 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
125 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
126 AT_WRITE_FLUSH(&adapter->hw);
127 }
128
129 /**
130 * atl1e_phy_config - Timer Call-back
131 * @data: pointer to netdev cast into an unsigned long
132 */
133 static void atl1e_phy_config(struct timer_list *t)
134 {
135 struct atl1e_adapter *adapter = from_timer(adapter, t,
136 phy_config_timer);
137 struct atl1e_hw *hw = &adapter->hw;
138 unsigned long flags;
139
140 spin_lock_irqsave(&adapter->mdio_lock, flags);
141 atl1e_restart_autoneg(hw);
142 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
143 }
144
145 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
146 {
147
148 WARN_ON(in_interrupt());
149 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
150 msleep(1);
151 atl1e_down(adapter);
152 atl1e_up(adapter);
153 clear_bit(__AT_RESETTING, &adapter->flags);
154 }
155
156 static void atl1e_reset_task(struct work_struct *work)
157 {
158 struct atl1e_adapter *adapter;
159 adapter = container_of(work, struct atl1e_adapter, reset_task);
160
161 atl1e_reinit_locked(adapter);
162 }
163
164 static int atl1e_check_link(struct atl1e_adapter *adapter)
165 {
166 struct atl1e_hw *hw = &adapter->hw;
167 struct net_device *netdev = adapter->netdev;
168 int err = 0;
169 u16 speed, duplex, phy_data;
170
171 /* MII_BMSR must read twice */
172 atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
173 atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
174 if ((phy_data & BMSR_LSTATUS) == 0) {
175 /* link down */
176 if (netif_carrier_ok(netdev)) { /* old link state: Up */
177 u32 value;
178 /* disable rx */
179 value = AT_READ_REG(hw, REG_MAC_CTRL);
180 value &= ~MAC_CTRL_RX_EN;
181 AT_WRITE_REG(hw, REG_MAC_CTRL, value);
182 adapter->link_speed = SPEED_0;
183 netif_carrier_off(netdev);
184 netif_stop_queue(netdev);
185 }
186 } else {
187 /* Link Up */
188 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
189 if (unlikely(err))
190 return err;
191
192 /* link result is our setting */
193 if (adapter->link_speed != speed ||
194 adapter->link_duplex != duplex) {
195 adapter->link_speed = speed;
196 adapter->link_duplex = duplex;
197 atl1e_setup_mac_ctrl(adapter);
198 netdev_info(netdev,
199 "NIC Link is Up <%d Mbps %s Duplex>\n",
200 adapter->link_speed,
201 adapter->link_duplex == FULL_DUPLEX ?
202 "Full" : "Half");
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 u16 phy_data = 0;
233 u16 link_up = 0;
234
235 spin_lock(&adapter->mdio_lock);
236 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
237 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
238 spin_unlock(&adapter->mdio_lock);
239 link_up = phy_data & BMSR_LSTATUS;
240 /* notify upper layer link down ASAP */
241 if (!link_up) {
242 if (netif_carrier_ok(netdev)) {
243 /* old link state: Up */
244 netdev_info(netdev, "NIC Link is Down\n");
245 adapter->link_speed = SPEED_0;
246 netif_stop_queue(netdev);
247 }
248 }
249 schedule_work(&adapter->link_chg_task);
250 }
251
252 static void atl1e_del_timer(struct atl1e_adapter *adapter)
253 {
254 del_timer_sync(&adapter->phy_config_timer);
255 }
256
257 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
258 {
259 cancel_work_sync(&adapter->reset_task);
260 cancel_work_sync(&adapter->link_chg_task);
261 }
262
263 /**
264 * atl1e_tx_timeout - Respond to a Tx Hang
265 * @netdev: network interface device structure
266 */
267 static void atl1e_tx_timeout(struct net_device *netdev)
268 {
269 struct atl1e_adapter *adapter = netdev_priv(netdev);
270
271 /* Do the reset outside of interrupt context */
272 schedule_work(&adapter->reset_task);
273 }
274
275 /**
276 * atl1e_set_multi - Multicast and Promiscuous mode set
277 * @netdev: network interface device structure
278 *
279 * The set_multi entry point is called whenever the multicast address
280 * list or the network interface flags are updated. This routine is
281 * responsible for configuring the hardware for proper multicast,
282 * promiscuous mode, and all-multi behavior.
283 */
284 static void atl1e_set_multi(struct net_device *netdev)
285 {
286 struct atl1e_adapter *adapter = netdev_priv(netdev);
287 struct atl1e_hw *hw = &adapter->hw;
288 struct netdev_hw_addr *ha;
289 u32 mac_ctrl_data = 0;
290 u32 hash_value;
291
292 /* Check for Promiscuous and All Multicast modes */
293 mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
294
295 if (netdev->flags & IFF_PROMISC) {
296 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
297 } else if (netdev->flags & IFF_ALLMULTI) {
298 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
299 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
300 } else {
301 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
302 }
303
304 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
305
306 /* clear the old settings from the multicast hash table */
307 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
308 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
309
310 /* comoute mc addresses' hash value ,and put it into hash table */
311 netdev_for_each_mc_addr(ha, netdev) {
312 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
313 atl1e_hash_set(hw, hash_value);
314 }
315 }
316
317 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
318 {
319
320 if (features & NETIF_F_RXALL) {
321 /* enable RX of ALL frames */
322 *mac_ctrl_data |= MAC_CTRL_DBG;
323 } else {
324 /* disable RX of ALL frames */
325 *mac_ctrl_data &= ~MAC_CTRL_DBG;
326 }
327 }
328
329 static void atl1e_rx_mode(struct net_device *netdev,
330 netdev_features_t features)
331 {
332 struct atl1e_adapter *adapter = netdev_priv(netdev);
333 u32 mac_ctrl_data = 0;
334
335 netdev_dbg(adapter->netdev, "%s\n", __func__);
336
337 atl1e_irq_disable(adapter);
338 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
339 __atl1e_rx_mode(features, &mac_ctrl_data);
340 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
341 atl1e_irq_enable(adapter);
342 }
343
344
345 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
346 {
347 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
348 /* enable VLAN tag insert/strip */
349 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
350 } else {
351 /* disable VLAN tag insert/strip */
352 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
353 }
354 }
355
356 static void atl1e_vlan_mode(struct net_device *netdev,
357 netdev_features_t features)
358 {
359 struct atl1e_adapter *adapter = netdev_priv(netdev);
360 u32 mac_ctrl_data = 0;
361
362 netdev_dbg(adapter->netdev, "%s\n", __func__);
363
364 atl1e_irq_disable(adapter);
365 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
366 __atl1e_vlan_mode(features, &mac_ctrl_data);
367 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
368 atl1e_irq_enable(adapter);
369 }
370
371 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
372 {
373 netdev_dbg(adapter->netdev, "%s\n", __func__);
374 atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
375 }
376
377 /**
378 * atl1e_set_mac - Change the Ethernet Address of the NIC
379 * @netdev: network interface device structure
380 * @p: pointer to an address structure
381 *
382 * Returns 0 on success, negative on failure
383 */
384 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
385 {
386 struct atl1e_adapter *adapter = netdev_priv(netdev);
387 struct sockaddr *addr = p;
388
389 if (!is_valid_ether_addr(addr->sa_data))
390 return -EADDRNOTAVAIL;
391
392 if (netif_running(netdev))
393 return -EBUSY;
394
395 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
396 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
397
398 atl1e_hw_set_mac_addr(&adapter->hw);
399
400 return 0;
401 }
402
403 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
404 netdev_features_t features)
405 {
406 /*
407 * Since there is no support for separate rx/tx vlan accel
408 * enable/disable make sure tx flag is always in same state as rx.
409 */
410 if (features & NETIF_F_HW_VLAN_CTAG_RX)
411 features |= NETIF_F_HW_VLAN_CTAG_TX;
412 else
413 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
414
415 return features;
416 }
417
418 static int atl1e_set_features(struct net_device *netdev,
419 netdev_features_t features)
420 {
421 netdev_features_t changed = netdev->features ^ features;
422
423 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
424 atl1e_vlan_mode(netdev, features);
425
426 if (changed & NETIF_F_RXALL)
427 atl1e_rx_mode(netdev, features);
428
429
430 return 0;
431 }
432
433 /**
434 * atl1e_change_mtu - Change the Maximum Transfer Unit
435 * @netdev: network interface device structure
436 * @new_mtu: new value for maximum frame size
437 *
438 * Returns 0 on success, negative on failure
439 */
440 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
441 {
442 struct atl1e_adapter *adapter = netdev_priv(netdev);
443 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
444
445 /* set MTU */
446 if (netif_running(netdev)) {
447 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
448 msleep(1);
449 netdev->mtu = new_mtu;
450 adapter->hw.max_frame_size = new_mtu;
451 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
452 atl1e_down(adapter);
453 atl1e_up(adapter);
454 clear_bit(__AT_RESETTING, &adapter->flags);
455 }
456 return 0;
457 }
458
459 /*
460 * caller should hold mdio_lock
461 */
462 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
463 {
464 struct atl1e_adapter *adapter = netdev_priv(netdev);
465 u16 result;
466
467 atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
468 return result;
469 }
470
471 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
472 int reg_num, int val)
473 {
474 struct atl1e_adapter *adapter = netdev_priv(netdev);
475
476 atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
477 }
478
479 static int atl1e_mii_ioctl(struct net_device *netdev,
480 struct ifreq *ifr, int cmd)
481 {
482 struct atl1e_adapter *adapter = netdev_priv(netdev);
483 struct mii_ioctl_data *data = if_mii(ifr);
484 unsigned long flags;
485 int retval = 0;
486
487 if (!netif_running(netdev))
488 return -EINVAL;
489
490 spin_lock_irqsave(&adapter->mdio_lock, flags);
491 switch (cmd) {
492 case SIOCGMIIPHY:
493 data->phy_id = 0;
494 break;
495
496 case SIOCGMIIREG:
497 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
498 &data->val_out)) {
499 retval = -EIO;
500 goto out;
501 }
502 break;
503
504 case SIOCSMIIREG:
505 if (data->reg_num & ~(0x1F)) {
506 retval = -EFAULT;
507 goto out;
508 }
509
510 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
511 data->reg_num, data->val_in);
512 if (atl1e_write_phy_reg(&adapter->hw,
513 data->reg_num, data->val_in)) {
514 retval = -EIO;
515 goto out;
516 }
517 break;
518
519 default:
520 retval = -EOPNOTSUPP;
521 break;
522 }
523 out:
524 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
525 return retval;
526
527 }
528
529 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
530 {
531 switch (cmd) {
532 case SIOCGMIIPHY:
533 case SIOCGMIIREG:
534 case SIOCSMIIREG:
535 return atl1e_mii_ioctl(netdev, ifr, cmd);
536 default:
537 return -EOPNOTSUPP;
538 }
539 }
540
541 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
542 {
543 u16 cmd;
544
545 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
546 cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
547 cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
548 pci_write_config_word(pdev, PCI_COMMAND, cmd);
549
550 /*
551 * some motherboards BIOS(PXE/EFI) driver may set PME
552 * while they transfer control to OS (Windows/Linux)
553 * so we should clear this bit before NIC work normally
554 */
555 pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
556 msleep(1);
557 }
558
559 /**
560 * atl1e_alloc_queues - Allocate memory for all rings
561 * @adapter: board private structure to initialize
562 *
563 */
564 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
565 {
566 return 0;
567 }
568
569 /**
570 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
571 * @adapter: board private structure to initialize
572 *
573 * atl1e_sw_init initializes the Adapter private data structure.
574 * Fields are initialized based on PCI device information and
575 * OS network device settings (MTU size).
576 */
577 static int atl1e_sw_init(struct atl1e_adapter *adapter)
578 {
579 struct atl1e_hw *hw = &adapter->hw;
580 struct pci_dev *pdev = adapter->pdev;
581 u32 phy_status_data = 0;
582
583 adapter->wol = 0;
584 adapter->link_speed = SPEED_0; /* hardware init */
585 adapter->link_duplex = FULL_DUPLEX;
586 adapter->num_rx_queues = 1;
587
588 /* PCI config space info */
589 hw->vendor_id = pdev->vendor;
590 hw->device_id = pdev->device;
591 hw->subsystem_vendor_id = pdev->subsystem_vendor;
592 hw->subsystem_id = pdev->subsystem_device;
593 hw->revision_id = pdev->revision;
594
595 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
596
597 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
598 /* nic type */
599 if (hw->revision_id >= 0xF0) {
600 hw->nic_type = athr_l2e_revB;
601 } else {
602 if (phy_status_data & PHY_STATUS_100M)
603 hw->nic_type = athr_l1e;
604 else
605 hw->nic_type = athr_l2e_revA;
606 }
607
608 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
609
610 if (phy_status_data & PHY_STATUS_EMI_CA)
611 hw->emi_ca = true;
612 else
613 hw->emi_ca = false;
614
615 hw->phy_configured = false;
616 hw->preamble_len = 7;
617 hw->max_frame_size = adapter->netdev->mtu;
618 hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
619 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
620
621 hw->rrs_type = atl1e_rrs_disable;
622 hw->indirect_tab = 0;
623 hw->base_cpu = 0;
624
625 /* need confirm */
626
627 hw->ict = 50000; /* 100ms */
628 hw->smb_timer = 200000; /* 200ms */
629 hw->tpd_burst = 5;
630 hw->rrd_thresh = 1;
631 hw->tpd_thresh = adapter->tx_ring.count / 2;
632 hw->rx_count_down = 4; /* 2us resolution */
633 hw->tx_count_down = hw->imt * 4 / 3;
634 hw->dmar_block = atl1e_dma_req_1024;
635 hw->dmaw_block = atl1e_dma_req_1024;
636 hw->dmar_dly_cnt = 15;
637 hw->dmaw_dly_cnt = 4;
638
639 if (atl1e_alloc_queues(adapter)) {
640 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
641 return -ENOMEM;
642 }
643
644 atomic_set(&adapter->irq_sem, 1);
645 spin_lock_init(&adapter->mdio_lock);
646
647 set_bit(__AT_DOWN, &adapter->flags);
648
649 return 0;
650 }
651
652 /**
653 * atl1e_clean_tx_ring - Free Tx-skb
654 * @adapter: board private structure
655 */
656 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
657 {
658 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
659 struct atl1e_tx_buffer *tx_buffer = NULL;
660 struct pci_dev *pdev = adapter->pdev;
661 u16 index, ring_count;
662
663 if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
664 return;
665
666 ring_count = tx_ring->count;
667 /* first unmmap dma */
668 for (index = 0; index < ring_count; index++) {
669 tx_buffer = &tx_ring->tx_buffer[index];
670 if (tx_buffer->dma) {
671 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
672 pci_unmap_single(pdev, tx_buffer->dma,
673 tx_buffer->length, PCI_DMA_TODEVICE);
674 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
675 pci_unmap_page(pdev, tx_buffer->dma,
676 tx_buffer->length, PCI_DMA_TODEVICE);
677 tx_buffer->dma = 0;
678 }
679 }
680 /* second free skb */
681 for (index = 0; index < ring_count; index++) {
682 tx_buffer = &tx_ring->tx_buffer[index];
683 if (tx_buffer->skb) {
684 dev_kfree_skb_any(tx_buffer->skb);
685 tx_buffer->skb = NULL;
686 }
687 }
688 /* Zero out Tx-buffers */
689 memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
690 ring_count);
691 memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
692 ring_count);
693 }
694
695 /**
696 * atl1e_clean_rx_ring - Free rx-reservation skbs
697 * @adapter: board private structure
698 */
699 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
700 {
701 struct atl1e_rx_ring *rx_ring =
702 &adapter->rx_ring;
703 struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
704 u16 i, j;
705
706
707 if (adapter->ring_vir_addr == NULL)
708 return;
709 /* Zero out the descriptor ring */
710 for (i = 0; i < adapter->num_rx_queues; i++) {
711 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
712 if (rx_page_desc[i].rx_page[j].addr != NULL) {
713 memset(rx_page_desc[i].rx_page[j].addr, 0,
714 rx_ring->real_page_size);
715 }
716 }
717 }
718 }
719
720 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
721 {
722 *ring_size = ((u32)(adapter->tx_ring.count *
723 sizeof(struct atl1e_tpd_desc) + 7
724 /* tx ring, qword align */
725 + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
726 adapter->num_rx_queues + 31
727 /* rx ring, 32 bytes align */
728 + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
729 sizeof(u32) + 3));
730 /* tx, rx cmd, dword align */
731 }
732
733 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
734 {
735 struct atl1e_rx_ring *rx_ring = NULL;
736
737 rx_ring = &adapter->rx_ring;
738
739 rx_ring->real_page_size = adapter->rx_ring.page_size
740 + adapter->hw.max_frame_size
741 + ETH_HLEN + VLAN_HLEN
742 + ETH_FCS_LEN;
743 rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
744 atl1e_cal_ring_size(adapter, &adapter->ring_size);
745
746 adapter->ring_vir_addr = NULL;
747 adapter->rx_ring.desc = NULL;
748 rwlock_init(&adapter->tx_ring.tx_lock);
749 }
750
751 /*
752 * Read / Write Ptr Initialize:
753 */
754 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
755 {
756 struct atl1e_tx_ring *tx_ring = NULL;
757 struct atl1e_rx_ring *rx_ring = NULL;
758 struct atl1e_rx_page_desc *rx_page_desc = NULL;
759 int i, j;
760
761 tx_ring = &adapter->tx_ring;
762 rx_ring = &adapter->rx_ring;
763 rx_page_desc = rx_ring->rx_page_desc;
764
765 tx_ring->next_to_use = 0;
766 atomic_set(&tx_ring->next_to_clean, 0);
767
768 for (i = 0; i < adapter->num_rx_queues; i++) {
769 rx_page_desc[i].rx_using = 0;
770 rx_page_desc[i].rx_nxseq = 0;
771 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
772 *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
773 rx_page_desc[i].rx_page[j].read_offset = 0;
774 }
775 }
776 }
777
778 /**
779 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
780 * @adapter: board private structure
781 *
782 * Free all transmit software resources
783 */
784 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
785 {
786 struct pci_dev *pdev = adapter->pdev;
787
788 atl1e_clean_tx_ring(adapter);
789 atl1e_clean_rx_ring(adapter);
790
791 if (adapter->ring_vir_addr) {
792 pci_free_consistent(pdev, adapter->ring_size,
793 adapter->ring_vir_addr, adapter->ring_dma);
794 adapter->ring_vir_addr = NULL;
795 }
796
797 if (adapter->tx_ring.tx_buffer) {
798 kfree(adapter->tx_ring.tx_buffer);
799 adapter->tx_ring.tx_buffer = NULL;
800 }
801 }
802
803 /**
804 * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
805 * @adapter: board private structure
806 *
807 * Return 0 on success, negative on failure
808 */
809 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
810 {
811 struct pci_dev *pdev = adapter->pdev;
812 struct atl1e_tx_ring *tx_ring;
813 struct atl1e_rx_ring *rx_ring;
814 struct atl1e_rx_page_desc *rx_page_desc;
815 int size, i, j;
816 u32 offset = 0;
817 int err = 0;
818
819 if (adapter->ring_vir_addr != NULL)
820 return 0; /* alloced already */
821
822 tx_ring = &adapter->tx_ring;
823 rx_ring = &adapter->rx_ring;
824
825 /* real ring DMA buffer */
826
827 size = adapter->ring_size;
828 adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
829 &adapter->ring_dma);
830 if (adapter->ring_vir_addr == NULL) {
831 netdev_err(adapter->netdev,
832 "pci_alloc_consistent failed, size = D%d\n", size);
833 return -ENOMEM;
834 }
835
836 rx_page_desc = rx_ring->rx_page_desc;
837
838 /* Init TPD Ring */
839 tx_ring->dma = roundup(adapter->ring_dma, 8);
840 offset = tx_ring->dma - adapter->ring_dma;
841 tx_ring->desc = adapter->ring_vir_addr + offset;
842 size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
843 tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
844 if (tx_ring->tx_buffer == NULL) {
845 err = -ENOMEM;
846 goto failed;
847 }
848
849 /* Init RXF-Pages */
850 offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
851 offset = roundup(offset, 32);
852
853 for (i = 0; i < adapter->num_rx_queues; i++) {
854 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
855 rx_page_desc[i].rx_page[j].dma =
856 adapter->ring_dma + offset;
857 rx_page_desc[i].rx_page[j].addr =
858 adapter->ring_vir_addr + offset;
859 offset += rx_ring->real_page_size;
860 }
861 }
862
863 /* Init CMB dma address */
864 tx_ring->cmb_dma = adapter->ring_dma + offset;
865 tx_ring->cmb = adapter->ring_vir_addr + offset;
866 offset += sizeof(u32);
867
868 for (i = 0; i < adapter->num_rx_queues; i++) {
869 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
870 rx_page_desc[i].rx_page[j].write_offset_dma =
871 adapter->ring_dma + offset;
872 rx_page_desc[i].rx_page[j].write_offset_addr =
873 adapter->ring_vir_addr + offset;
874 offset += sizeof(u32);
875 }
876 }
877
878 if (unlikely(offset > adapter->ring_size)) {
879 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
880 offset, adapter->ring_size);
881 err = -1;
882 goto failed;
883 }
884
885 return 0;
886 failed:
887 if (adapter->ring_vir_addr != NULL) {
888 pci_free_consistent(pdev, adapter->ring_size,
889 adapter->ring_vir_addr, adapter->ring_dma);
890 adapter->ring_vir_addr = NULL;
891 }
892 return err;
893 }
894
895 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
896 {
897
898 struct atl1e_hw *hw = &adapter->hw;
899 struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
900 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
901 struct atl1e_rx_page_desc *rx_page_desc = NULL;
902 int i, j;
903
904 AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
905 (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
906 AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
907 (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
908 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
909 AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
910 (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
911
912 rx_page_desc = rx_ring->rx_page_desc;
913 /* RXF Page Physical address / Page Length */
914 for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
915 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
916 (u32)((adapter->ring_dma &
917 AT_DMA_HI_ADDR_MASK) >> 32));
918 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
919 u32 page_phy_addr;
920 u32 offset_phy_addr;
921
922 page_phy_addr = rx_page_desc[i].rx_page[j].dma;
923 offset_phy_addr =
924 rx_page_desc[i].rx_page[j].write_offset_dma;
925
926 AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
927 page_phy_addr & AT_DMA_LO_ADDR_MASK);
928 AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
929 offset_phy_addr & AT_DMA_LO_ADDR_MASK);
930 AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
931 }
932 }
933 /* Page Length */
934 AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
935 /* Load all of base address above */
936 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
937 }
938
939 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
940 {
941 struct atl1e_hw *hw = &adapter->hw;
942 u32 dev_ctrl_data = 0;
943 u32 max_pay_load = 0;
944 u32 jumbo_thresh = 0;
945 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
946
947 /* configure TXQ param */
948 if (hw->nic_type != athr_l2e_revB) {
949 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
950 if (hw->max_frame_size <= 1500) {
951 jumbo_thresh = hw->max_frame_size + extra_size;
952 } else if (hw->max_frame_size < 6*1024) {
953 jumbo_thresh =
954 (hw->max_frame_size + extra_size) * 2 / 3;
955 } else {
956 jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
957 }
958 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
959 }
960
961 dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
962
963 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
964 DEVICE_CTRL_MAX_PAYLOAD_MASK;
965
966 hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
967
968 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
969 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
970 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
971
972 if (hw->nic_type != athr_l2e_revB)
973 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
974 atl1e_pay_load_size[hw->dmar_block]);
975 /* enable TXQ */
976 AT_WRITE_REGW(hw, REG_TXQ_CTRL,
977 (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
978 << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
979 | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
980 }
981
982 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
983 {
984 struct atl1e_hw *hw = &adapter->hw;
985 u32 rxf_len = 0;
986 u32 rxf_low = 0;
987 u32 rxf_high = 0;
988 u32 rxf_thresh_data = 0;
989 u32 rxq_ctrl_data = 0;
990
991 if (hw->nic_type != athr_l2e_revB) {
992 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
993 (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
994 RXQ_JMBOSZ_TH_SHIFT |
995 (1 & RXQ_JMBO_LKAH_MASK) <<
996 RXQ_JMBO_LKAH_SHIFT));
997
998 rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
999 rxf_high = rxf_len * 4 / 5;
1000 rxf_low = rxf_len / 5;
1001 rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK)
1002 << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1003 ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
1004 << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1005
1006 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
1007 }
1008
1009 /* RRS */
1010 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1011 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1012
1013 if (hw->rrs_type & atl1e_rrs_ipv4)
1014 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1015
1016 if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1017 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1018
1019 if (hw->rrs_type & atl1e_rrs_ipv6)
1020 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1021
1022 if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1023 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1024
1025 if (hw->rrs_type != atl1e_rrs_disable)
1026 rxq_ctrl_data |=
1027 (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1028
1029 rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1030 RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1031
1032 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1033 }
1034
1035 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1036 {
1037 struct atl1e_hw *hw = &adapter->hw;
1038 u32 dma_ctrl_data = 0;
1039
1040 dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1041 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1042 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1043 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1044 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1045 dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1046 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1047 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1048 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1049 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1050
1051 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1052 }
1053
1054 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1055 {
1056 u32 value;
1057 struct atl1e_hw *hw = &adapter->hw;
1058 struct net_device *netdev = adapter->netdev;
1059
1060 /* Config MAC CTRL Register */
1061 value = MAC_CTRL_TX_EN |
1062 MAC_CTRL_RX_EN ;
1063
1064 if (FULL_DUPLEX == adapter->link_duplex)
1065 value |= MAC_CTRL_DUPLX;
1066
1067 value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1068 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1069 MAC_CTRL_SPEED_SHIFT);
1070 value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1071
1072 value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1073 value |= (((u32)adapter->hw.preamble_len &
1074 MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1075
1076 __atl1e_vlan_mode(netdev->features, &value);
1077
1078 value |= MAC_CTRL_BC_EN;
1079 if (netdev->flags & IFF_PROMISC)
1080 value |= MAC_CTRL_PROMIS_EN;
1081 if (netdev->flags & IFF_ALLMULTI)
1082 value |= MAC_CTRL_MC_ALL_EN;
1083 if (netdev->features & NETIF_F_RXALL)
1084 value |= MAC_CTRL_DBG;
1085 AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1086 }
1087
1088 /**
1089 * atl1e_configure - Configure Transmit&Receive Unit after Reset
1090 * @adapter: board private structure
1091 *
1092 * Configure the Tx /Rx unit of the MAC after a reset.
1093 */
1094 static int atl1e_configure(struct atl1e_adapter *adapter)
1095 {
1096 struct atl1e_hw *hw = &adapter->hw;
1097
1098 u32 intr_status_data = 0;
1099
1100 /* clear interrupt status */
1101 AT_WRITE_REG(hw, REG_ISR, ~0);
1102
1103 /* 1. set MAC Address */
1104 atl1e_hw_set_mac_addr(hw);
1105
1106 /* 2. Init the Multicast HASH table done by set_muti */
1107
1108 /* 3. Clear any WOL status */
1109 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1110
1111 /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1112 * TPD Ring/SMB/RXF0 Page CMBs, they use the same
1113 * High 32bits memory */
1114 atl1e_configure_des_ring(adapter);
1115
1116 /* 5. set Interrupt Moderator Timer */
1117 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1118 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1119 AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1120 MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1121
1122 /* 6. rx/tx threshold to trig interrupt */
1123 AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1124 AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1125 AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1126 AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1127
1128 /* 7. set Interrupt Clear Timer */
1129 AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1130
1131 /* 8. set MTU */
1132 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1133 VLAN_HLEN + ETH_FCS_LEN);
1134
1135 /* 9. config TXQ early tx threshold */
1136 atl1e_configure_tx(adapter);
1137
1138 /* 10. config RXQ */
1139 atl1e_configure_rx(adapter);
1140
1141 /* 11. config DMA Engine */
1142 atl1e_configure_dma(adapter);
1143
1144 /* 12. smb timer to trig interrupt */
1145 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1146
1147 intr_status_data = AT_READ_REG(hw, REG_ISR);
1148 if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1149 netdev_err(adapter->netdev,
1150 "atl1e_configure failed, PCIE phy link down\n");
1151 return -1;
1152 }
1153
1154 AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1155 return 0;
1156 }
1157
1158 /**
1159 * atl1e_get_stats - Get System Network Statistics
1160 * @netdev: network interface device structure
1161 *
1162 * Returns the address of the device statistics structure.
1163 * The statistics are actually updated from the timer callback.
1164 */
1165 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1166 {
1167 struct atl1e_adapter *adapter = netdev_priv(netdev);
1168 struct atl1e_hw_stats *hw_stats = &adapter->hw_stats;
1169 struct net_device_stats *net_stats = &netdev->stats;
1170
1171 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1172 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1173 net_stats->multicast = hw_stats->rx_mcast;
1174 net_stats->collisions = hw_stats->tx_1_col +
1175 hw_stats->tx_2_col +
1176 hw_stats->tx_late_col +
1177 hw_stats->tx_abort_col;
1178
1179 net_stats->rx_errors = hw_stats->rx_frag +
1180 hw_stats->rx_fcs_err +
1181 hw_stats->rx_len_err +
1182 hw_stats->rx_sz_ov +
1183 hw_stats->rx_rrd_ov +
1184 hw_stats->rx_align_err +
1185 hw_stats->rx_rxf_ov;
1186
1187 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1188 net_stats->rx_length_errors = hw_stats->rx_len_err;
1189 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1190 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1191 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1192
1193 net_stats->tx_errors = hw_stats->tx_late_col +
1194 hw_stats->tx_abort_col +
1195 hw_stats->tx_underrun +
1196 hw_stats->tx_trunc;
1197
1198 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1199 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1200 net_stats->tx_window_errors = hw_stats->tx_late_col;
1201
1202 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1203 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1204
1205 return net_stats;
1206 }
1207
1208 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1209 {
1210 u16 hw_reg_addr = 0;
1211 unsigned long *stats_item = NULL;
1212
1213 /* update rx status */
1214 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1215 stats_item = &adapter->hw_stats.rx_ok;
1216 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1217 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1218 stats_item++;
1219 hw_reg_addr += 4;
1220 }
1221 /* update tx status */
1222 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1223 stats_item = &adapter->hw_stats.tx_ok;
1224 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1225 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1226 stats_item++;
1227 hw_reg_addr += 4;
1228 }
1229 }
1230
1231 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1232 {
1233 u16 phy_data;
1234
1235 spin_lock(&adapter->mdio_lock);
1236 atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1237 spin_unlock(&adapter->mdio_lock);
1238 }
1239
1240 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1241 {
1242 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1243 struct atl1e_tx_buffer *tx_buffer = NULL;
1244 u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1245 u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1246
1247 while (next_to_clean != hw_next_to_clean) {
1248 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1249 if (tx_buffer->dma) {
1250 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1251 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1252 tx_buffer->length, PCI_DMA_TODEVICE);
1253 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1254 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1255 tx_buffer->length, PCI_DMA_TODEVICE);
1256 tx_buffer->dma = 0;
1257 }
1258
1259 if (tx_buffer->skb) {
1260 dev_kfree_skb_irq(tx_buffer->skb);
1261 tx_buffer->skb = NULL;
1262 }
1263
1264 if (++next_to_clean == tx_ring->count)
1265 next_to_clean = 0;
1266 }
1267
1268 atomic_set(&tx_ring->next_to_clean, next_to_clean);
1269
1270 if (netif_queue_stopped(adapter->netdev) &&
1271 netif_carrier_ok(adapter->netdev)) {
1272 netif_wake_queue(adapter->netdev);
1273 }
1274
1275 return true;
1276 }
1277
1278 /**
1279 * atl1e_intr - Interrupt Handler
1280 * @irq: interrupt number
1281 * @data: pointer to a network interface device structure
1282 */
1283 static irqreturn_t atl1e_intr(int irq, void *data)
1284 {
1285 struct net_device *netdev = data;
1286 struct atl1e_adapter *adapter = netdev_priv(netdev);
1287 struct atl1e_hw *hw = &adapter->hw;
1288 int max_ints = AT_MAX_INT_WORK;
1289 int handled = IRQ_NONE;
1290 u32 status;
1291
1292 do {
1293 status = AT_READ_REG(hw, REG_ISR);
1294 if ((status & IMR_NORMAL_MASK) == 0 ||
1295 (status & ISR_DIS_INT) != 0) {
1296 if (max_ints != AT_MAX_INT_WORK)
1297 handled = IRQ_HANDLED;
1298 break;
1299 }
1300 /* link event */
1301 if (status & ISR_GPHY)
1302 atl1e_clear_phy_int(adapter);
1303 /* Ack ISR */
1304 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1305
1306 handled = IRQ_HANDLED;
1307 /* check if PCIE PHY Link down */
1308 if (status & ISR_PHY_LINKDOWN) {
1309 netdev_err(adapter->netdev,
1310 "pcie phy linkdown %x\n", status);
1311 if (netif_running(adapter->netdev)) {
1312 /* reset MAC */
1313 atl1e_irq_reset(adapter);
1314 schedule_work(&adapter->reset_task);
1315 break;
1316 }
1317 }
1318
1319 /* check if DMA read/write error */
1320 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1321 netdev_err(adapter->netdev,
1322 "PCIE DMA RW error (status = 0x%x)\n",
1323 status);
1324 atl1e_irq_reset(adapter);
1325 schedule_work(&adapter->reset_task);
1326 break;
1327 }
1328
1329 if (status & ISR_SMB)
1330 atl1e_update_hw_stats(adapter);
1331
1332 /* link event */
1333 if (status & (ISR_GPHY | ISR_MANUAL)) {
1334 netdev->stats.tx_carrier_errors++;
1335 atl1e_link_chg_event(adapter);
1336 break;
1337 }
1338
1339 /* transmit event */
1340 if (status & ISR_TX_EVENT)
1341 atl1e_clean_tx_irq(adapter);
1342
1343 if (status & ISR_RX_EVENT) {
1344 /*
1345 * disable rx interrupts, without
1346 * the synchronize_irq bit
1347 */
1348 AT_WRITE_REG(hw, REG_IMR,
1349 IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1350 AT_WRITE_FLUSH(hw);
1351 if (likely(napi_schedule_prep(
1352 &adapter->napi)))
1353 __napi_schedule(&adapter->napi);
1354 }
1355 } while (--max_ints > 0);
1356 /* re-enable Interrupt*/
1357 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1358
1359 return handled;
1360 }
1361
1362 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1363 struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1364 {
1365 u8 *packet = (u8 *)(prrs + 1);
1366 struct iphdr *iph;
1367 u16 head_len = ETH_HLEN;
1368 u16 pkt_flags;
1369 u16 err_flags;
1370
1371 skb_checksum_none_assert(skb);
1372 pkt_flags = prrs->pkt_flag;
1373 err_flags = prrs->err_flag;
1374 if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1375 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1376 if (pkt_flags & RRS_IS_IPV4) {
1377 if (pkt_flags & RRS_IS_802_3)
1378 head_len += 8;
1379 iph = (struct iphdr *) (packet + head_len);
1380 if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1381 goto hw_xsum;
1382 }
1383 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1384 skb->ip_summed = CHECKSUM_UNNECESSARY;
1385 return;
1386 }
1387 }
1388
1389 hw_xsum :
1390 return;
1391 }
1392
1393 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1394 u8 que)
1395 {
1396 struct atl1e_rx_page_desc *rx_page_desc =
1397 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1398 u8 rx_using = rx_page_desc[que].rx_using;
1399
1400 return &(rx_page_desc[que].rx_page[rx_using]);
1401 }
1402
1403 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1404 int *work_done, int work_to_do)
1405 {
1406 struct net_device *netdev = adapter->netdev;
1407 struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1408 struct atl1e_rx_page_desc *rx_page_desc =
1409 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1410 struct sk_buff *skb = NULL;
1411 struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1412 u32 packet_size, write_offset;
1413 struct atl1e_recv_ret_status *prrs;
1414
1415 write_offset = *(rx_page->write_offset_addr);
1416 if (likely(rx_page->read_offset < write_offset)) {
1417 do {
1418 if (*work_done >= work_to_do)
1419 break;
1420 (*work_done)++;
1421 /* get new packet's rrs */
1422 prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1423 rx_page->read_offset);
1424 /* check sequence number */
1425 if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1426 netdev_err(netdev,
1427 "rx sequence number error (rx=%d) (expect=%d)\n",
1428 prrs->seq_num,
1429 rx_page_desc[que].rx_nxseq);
1430 rx_page_desc[que].rx_nxseq++;
1431 /* just for debug use */
1432 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1433 (((u32)prrs->seq_num) << 16) |
1434 rx_page_desc[que].rx_nxseq);
1435 goto fatal_err;
1436 }
1437 rx_page_desc[que].rx_nxseq++;
1438
1439 /* error packet */
1440 if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1441 !(netdev->features & NETIF_F_RXALL)) {
1442 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1443 RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1444 RRS_ERR_TRUNC)) {
1445 /* hardware error, discard this packet*/
1446 netdev_err(netdev,
1447 "rx packet desc error %x\n",
1448 *((u32 *)prrs + 1));
1449 goto skip_pkt;
1450 }
1451 }
1452
1453 packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1454 RRS_PKT_SIZE_MASK);
1455 if (likely(!(netdev->features & NETIF_F_RXFCS)))
1456 packet_size -= 4; /* CRC */
1457
1458 skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1459 if (skb == NULL)
1460 goto skip_pkt;
1461
1462 memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1463 skb_put(skb, packet_size);
1464 skb->protocol = eth_type_trans(skb, netdev);
1465 atl1e_rx_checksum(adapter, skb, prrs);
1466
1467 if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1468 u16 vlan_tag = (prrs->vtag >> 4) |
1469 ((prrs->vtag & 7) << 13) |
1470 ((prrs->vtag & 8) << 9);
1471 netdev_dbg(netdev,
1472 "RXD VLAN TAG<RRD>=0x%04x\n",
1473 prrs->vtag);
1474 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1475 }
1476 napi_gro_receive(&adapter->napi, skb);
1477
1478 skip_pkt:
1479 /* skip current packet whether it's ok or not. */
1480 rx_page->read_offset +=
1481 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1482 RRS_PKT_SIZE_MASK) +
1483 sizeof(struct atl1e_recv_ret_status) + 31) &
1484 0xFFFFFFE0);
1485
1486 if (rx_page->read_offset >= rx_ring->page_size) {
1487 /* mark this page clean */
1488 u16 reg_addr;
1489 u8 rx_using;
1490
1491 rx_page->read_offset =
1492 *(rx_page->write_offset_addr) = 0;
1493 rx_using = rx_page_desc[que].rx_using;
1494 reg_addr =
1495 atl1e_rx_page_vld_regs[que][rx_using];
1496 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1497 rx_page_desc[que].rx_using ^= 1;
1498 rx_page = atl1e_get_rx_page(adapter, que);
1499 }
1500 write_offset = *(rx_page->write_offset_addr);
1501 } while (rx_page->read_offset < write_offset);
1502 }
1503
1504 return;
1505
1506 fatal_err:
1507 if (!test_bit(__AT_DOWN, &adapter->flags))
1508 schedule_work(&adapter->reset_task);
1509 }
1510
1511 /**
1512 * atl1e_clean - NAPI Rx polling callback
1513 */
1514 static int atl1e_clean(struct napi_struct *napi, int budget)
1515 {
1516 struct atl1e_adapter *adapter =
1517 container_of(napi, struct atl1e_adapter, napi);
1518 u32 imr_data;
1519 int work_done = 0;
1520
1521 /* Keep link state information with original netdev */
1522 if (!netif_carrier_ok(adapter->netdev))
1523 goto quit_polling;
1524
1525 atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1526
1527 /* If no Tx and not enough Rx work done, exit the polling mode */
1528 if (work_done < budget) {
1529 quit_polling:
1530 napi_complete_done(napi, work_done);
1531 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1532 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1533 /* test debug */
1534 if (test_bit(__AT_DOWN, &adapter->flags)) {
1535 atomic_dec(&adapter->irq_sem);
1536 netdev_err(adapter->netdev,
1537 "atl1e_clean is called when AT_DOWN\n");
1538 }
1539 /* reenable RX intr */
1540 /*atl1e_irq_enable(adapter); */
1541
1542 }
1543 return work_done;
1544 }
1545
1546 #ifdef CONFIG_NET_POLL_CONTROLLER
1547
1548 /*
1549 * Polling 'interrupt' - used by things like netconsole to send skbs
1550 * without having to re-enable interrupts. It's not called while
1551 * the interrupt routine is executing.
1552 */
1553 static void atl1e_netpoll(struct net_device *netdev)
1554 {
1555 struct atl1e_adapter *adapter = netdev_priv(netdev);
1556
1557 disable_irq(adapter->pdev->irq);
1558 atl1e_intr(adapter->pdev->irq, netdev);
1559 enable_irq(adapter->pdev->irq);
1560 }
1561 #endif
1562
1563 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1564 {
1565 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1566 u16 next_to_use = 0;
1567 u16 next_to_clean = 0;
1568
1569 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1570 next_to_use = tx_ring->next_to_use;
1571
1572 return (u16)(next_to_clean > next_to_use) ?
1573 (next_to_clean - next_to_use - 1) :
1574 (tx_ring->count + next_to_clean - next_to_use - 1);
1575 }
1576
1577 /*
1578 * get next usable tpd
1579 * Note: should call atl1e_tdp_avail to make sure
1580 * there is enough tpd to use
1581 */
1582 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1583 {
1584 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1585 u16 next_to_use = 0;
1586
1587 next_to_use = tx_ring->next_to_use;
1588 if (++tx_ring->next_to_use == tx_ring->count)
1589 tx_ring->next_to_use = 0;
1590
1591 memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1592 return &tx_ring->desc[next_to_use];
1593 }
1594
1595 static struct atl1e_tx_buffer *
1596 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1597 {
1598 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1599
1600 return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1601 }
1602
1603 /* Calculate the transmit packet descript needed*/
1604 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1605 {
1606 int i = 0;
1607 u16 tpd_req = 1;
1608 u16 fg_size = 0;
1609 u16 proto_hdr_len = 0;
1610
1611 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1612 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1613 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1614 }
1615
1616 if (skb_is_gso(skb)) {
1617 if (skb->protocol == htons(ETH_P_IP) ||
1618 (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1619 proto_hdr_len = skb_transport_offset(skb) +
1620 tcp_hdrlen(skb);
1621 if (proto_hdr_len < skb_headlen(skb)) {
1622 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1623 MAX_TX_BUF_LEN - 1) >>
1624 MAX_TX_BUF_SHIFT);
1625 }
1626 }
1627
1628 }
1629 return tpd_req;
1630 }
1631
1632 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1633 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1634 {
1635 unsigned short offload_type;
1636 u8 hdr_len;
1637 u32 real_len;
1638
1639 if (skb_is_gso(skb)) {
1640 int err;
1641
1642 err = skb_cow_head(skb, 0);
1643 if (err < 0)
1644 return err;
1645
1646 offload_type = skb_shinfo(skb)->gso_type;
1647
1648 if (offload_type & SKB_GSO_TCPV4) {
1649 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1650 + ntohs(ip_hdr(skb)->tot_len));
1651
1652 if (real_len < skb->len)
1653 pskb_trim(skb, real_len);
1654
1655 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1656 if (unlikely(skb->len == hdr_len)) {
1657 /* only xsum need */
1658 netdev_warn(adapter->netdev,
1659 "IPV4 tso with zero data??\n");
1660 goto check_sum;
1661 } else {
1662 ip_hdr(skb)->check = 0;
1663 ip_hdr(skb)->tot_len = 0;
1664 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1665 ip_hdr(skb)->saddr,
1666 ip_hdr(skb)->daddr,
1667 0, IPPROTO_TCP, 0);
1668 tpd->word3 |= (ip_hdr(skb)->ihl &
1669 TDP_V4_IPHL_MASK) <<
1670 TPD_V4_IPHL_SHIFT;
1671 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1672 TPD_TCPHDRLEN_MASK) <<
1673 TPD_TCPHDRLEN_SHIFT;
1674 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1675 TPD_MSS_MASK) << TPD_MSS_SHIFT;
1676 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1677 }
1678 return 0;
1679 }
1680 }
1681
1682 check_sum:
1683 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1684 u8 css, cso;
1685
1686 cso = skb_checksum_start_offset(skb);
1687 if (unlikely(cso & 0x1)) {
1688 netdev_err(adapter->netdev,
1689 "payload offset should not ant event number\n");
1690 return -1;
1691 } else {
1692 css = cso + skb->csum_offset;
1693 tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1694 TPD_PLOADOFFSET_SHIFT;
1695 tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1696 TPD_CCSUMOFFSET_SHIFT;
1697 tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1698 }
1699 }
1700
1701 return 0;
1702 }
1703
1704 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1705 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1706 {
1707 struct atl1e_tpd_desc *use_tpd = NULL;
1708 struct atl1e_tx_buffer *tx_buffer = NULL;
1709 u16 buf_len = skb_headlen(skb);
1710 u16 map_len = 0;
1711 u16 mapped_len = 0;
1712 u16 hdr_len = 0;
1713 u16 nr_frags;
1714 u16 f;
1715 int segment;
1716 int ring_start = adapter->tx_ring.next_to_use;
1717 int ring_end;
1718
1719 nr_frags = skb_shinfo(skb)->nr_frags;
1720 segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1721 if (segment) {
1722 /* TSO */
1723 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1724 use_tpd = tpd;
1725
1726 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1727 tx_buffer->length = map_len;
1728 tx_buffer->dma = pci_map_single(adapter->pdev,
1729 skb->data, hdr_len, PCI_DMA_TODEVICE);
1730 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1731 return -ENOSPC;
1732
1733 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1734 mapped_len += map_len;
1735 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1736 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1737 ((cpu_to_le32(tx_buffer->length) &
1738 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1739 }
1740
1741 while (mapped_len < buf_len) {
1742 /* mapped_len == 0, means we should use the first tpd,
1743 which is given by caller */
1744 if (mapped_len == 0) {
1745 use_tpd = tpd;
1746 } else {
1747 use_tpd = atl1e_get_tpd(adapter);
1748 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1749 }
1750 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1751 tx_buffer->skb = NULL;
1752
1753 tx_buffer->length = map_len =
1754 ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1755 MAX_TX_BUF_LEN : (buf_len - mapped_len);
1756 tx_buffer->dma =
1757 pci_map_single(adapter->pdev, skb->data + mapped_len,
1758 map_len, PCI_DMA_TODEVICE);
1759
1760 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1761 /* We need to unwind the mappings we've done */
1762 ring_end = adapter->tx_ring.next_to_use;
1763 adapter->tx_ring.next_to_use = ring_start;
1764 while (adapter->tx_ring.next_to_use != ring_end) {
1765 tpd = atl1e_get_tpd(adapter);
1766 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1767 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1768 tx_buffer->length, PCI_DMA_TODEVICE);
1769 }
1770 /* Reset the tx rings next pointer */
1771 adapter->tx_ring.next_to_use = ring_start;
1772 return -ENOSPC;
1773 }
1774
1775 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1776 mapped_len += map_len;
1777 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1778 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1779 ((cpu_to_le32(tx_buffer->length) &
1780 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1781 }
1782
1783 for (f = 0; f < nr_frags; f++) {
1784 const struct skb_frag_struct *frag;
1785 u16 i;
1786 u16 seg_num;
1787
1788 frag = &skb_shinfo(skb)->frags[f];
1789 buf_len = skb_frag_size(frag);
1790
1791 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1792 for (i = 0; i < seg_num; i++) {
1793 use_tpd = atl1e_get_tpd(adapter);
1794 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1795
1796 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1797 BUG_ON(tx_buffer->skb);
1798
1799 tx_buffer->skb = NULL;
1800 tx_buffer->length =
1801 (buf_len > MAX_TX_BUF_LEN) ?
1802 MAX_TX_BUF_LEN : buf_len;
1803 buf_len -= tx_buffer->length;
1804
1805 tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1806 frag,
1807 (i * MAX_TX_BUF_LEN),
1808 tx_buffer->length,
1809 DMA_TO_DEVICE);
1810
1811 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1812 /* We need to unwind the mappings we've done */
1813 ring_end = adapter->tx_ring.next_to_use;
1814 adapter->tx_ring.next_to_use = ring_start;
1815 while (adapter->tx_ring.next_to_use != ring_end) {
1816 tpd = atl1e_get_tpd(adapter);
1817 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1818 dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1819 tx_buffer->length, DMA_TO_DEVICE);
1820 }
1821
1822 /* Reset the ring next to use pointer */
1823 adapter->tx_ring.next_to_use = ring_start;
1824 return -ENOSPC;
1825 }
1826
1827 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1828 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1829 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1830 ((cpu_to_le32(tx_buffer->length) &
1831 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1832 }
1833 }
1834
1835 if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1836 /* note this one is a tcp header */
1837 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1838 /* The last tpd */
1839
1840 use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1841 /* The last buffer info contain the skb address,
1842 so it will be free after unmap */
1843 tx_buffer->skb = skb;
1844 return 0;
1845 }
1846
1847 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1848 struct atl1e_tpd_desc *tpd)
1849 {
1850 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1851 /* Force memory writes to complete before letting h/w
1852 * know there are new descriptors to fetch. (Only
1853 * applicable for weak-ordered memory model archs,
1854 * such as IA-64). */
1855 wmb();
1856 AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1857 }
1858
1859 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1860 struct net_device *netdev)
1861 {
1862 struct atl1e_adapter *adapter = netdev_priv(netdev);
1863 u16 tpd_req = 1;
1864 struct atl1e_tpd_desc *tpd;
1865
1866 if (test_bit(__AT_DOWN, &adapter->flags)) {
1867 dev_kfree_skb_any(skb);
1868 return NETDEV_TX_OK;
1869 }
1870
1871 if (unlikely(skb->len <= 0)) {
1872 dev_kfree_skb_any(skb);
1873 return NETDEV_TX_OK;
1874 }
1875 tpd_req = atl1e_cal_tdp_req(skb);
1876
1877 if (atl1e_tpd_avail(adapter) < tpd_req) {
1878 /* no enough descriptor, just stop queue */
1879 netif_stop_queue(netdev);
1880 return NETDEV_TX_BUSY;
1881 }
1882
1883 tpd = atl1e_get_tpd(adapter);
1884
1885 if (skb_vlan_tag_present(skb)) {
1886 u16 vlan_tag = skb_vlan_tag_get(skb);
1887 u16 atl1e_vlan_tag;
1888
1889 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1890 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1891 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1892 TPD_VLAN_SHIFT;
1893 }
1894
1895 if (skb->protocol == htons(ETH_P_8021Q))
1896 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1897
1898 if (skb_network_offset(skb) != ETH_HLEN)
1899 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1900
1901 /* do TSO and check sum */
1902 if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1903 dev_kfree_skb_any(skb);
1904 return NETDEV_TX_OK;
1905 }
1906
1907 if (atl1e_tx_map(adapter, skb, tpd)) {
1908 dev_kfree_skb_any(skb);
1909 goto out;
1910 }
1911
1912 atl1e_tx_queue(adapter, tpd_req, tpd);
1913 out:
1914 return NETDEV_TX_OK;
1915 }
1916
1917 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1918 {
1919 struct net_device *netdev = adapter->netdev;
1920
1921 free_irq(adapter->pdev->irq, netdev);
1922 }
1923
1924 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1925 {
1926 struct pci_dev *pdev = adapter->pdev;
1927 struct net_device *netdev = adapter->netdev;
1928 int err = 0;
1929
1930 err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1931 netdev);
1932 if (err) {
1933 netdev_dbg(adapter->netdev,
1934 "Unable to allocate interrupt Error: %d\n", err);
1935 return err;
1936 }
1937 netdev_dbg(netdev, "atl1e_request_irq OK\n");
1938 return err;
1939 }
1940
1941 int atl1e_up(struct atl1e_adapter *adapter)
1942 {
1943 struct net_device *netdev = adapter->netdev;
1944 int err = 0;
1945 u32 val;
1946
1947 /* hardware has been reset, we need to reload some things */
1948 err = atl1e_init_hw(&adapter->hw);
1949 if (err) {
1950 err = -EIO;
1951 return err;
1952 }
1953 atl1e_init_ring_ptrs(adapter);
1954 atl1e_set_multi(netdev);
1955 atl1e_restore_vlan(adapter);
1956
1957 if (atl1e_configure(adapter)) {
1958 err = -EIO;
1959 goto err_up;
1960 }
1961
1962 clear_bit(__AT_DOWN, &adapter->flags);
1963 napi_enable(&adapter->napi);
1964 atl1e_irq_enable(adapter);
1965 val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1966 AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1967 val | MASTER_CTRL_MANUAL_INT);
1968
1969 err_up:
1970 return err;
1971 }
1972
1973 void atl1e_down(struct atl1e_adapter *adapter)
1974 {
1975 struct net_device *netdev = adapter->netdev;
1976
1977 /* signal that we're down so the interrupt handler does not
1978 * reschedule our watchdog timer */
1979 set_bit(__AT_DOWN, &adapter->flags);
1980
1981 netif_stop_queue(netdev);
1982
1983 /* reset MAC to disable all RX/TX */
1984 atl1e_reset_hw(&adapter->hw);
1985 msleep(1);
1986
1987 napi_disable(&adapter->napi);
1988 atl1e_del_timer(adapter);
1989 atl1e_irq_disable(adapter);
1990
1991 netif_carrier_off(netdev);
1992 adapter->link_speed = SPEED_0;
1993 adapter->link_duplex = -1;
1994 atl1e_clean_tx_ring(adapter);
1995 atl1e_clean_rx_ring(adapter);
1996 }
1997
1998 /**
1999 * atl1e_open - Called when a network interface is made active
2000 * @netdev: network interface device structure
2001 *
2002 * Returns 0 on success, negative value on failure
2003 *
2004 * The open entry point is called when a network interface is made
2005 * active by the system (IFF_UP). At this point all resources needed
2006 * for transmit and receive operations are allocated, the interrupt
2007 * handler is registered with the OS, the watchdog timer is started,
2008 * and the stack is notified that the interface is ready.
2009 */
2010 static int atl1e_open(struct net_device *netdev)
2011 {
2012 struct atl1e_adapter *adapter = netdev_priv(netdev);
2013 int err;
2014
2015 /* disallow open during test */
2016 if (test_bit(__AT_TESTING, &adapter->flags))
2017 return -EBUSY;
2018
2019 /* allocate rx/tx dma buffer & descriptors */
2020 atl1e_init_ring_resources(adapter);
2021 err = atl1e_setup_ring_resources(adapter);
2022 if (unlikely(err))
2023 return err;
2024
2025 err = atl1e_request_irq(adapter);
2026 if (unlikely(err))
2027 goto err_req_irq;
2028
2029 err = atl1e_up(adapter);
2030 if (unlikely(err))
2031 goto err_up;
2032
2033 return 0;
2034
2035 err_up:
2036 atl1e_free_irq(adapter);
2037 err_req_irq:
2038 atl1e_free_ring_resources(adapter);
2039 atl1e_reset_hw(&adapter->hw);
2040
2041 return err;
2042 }
2043
2044 /**
2045 * atl1e_close - Disables a network interface
2046 * @netdev: network interface device structure
2047 *
2048 * Returns 0, this is not allowed to fail
2049 *
2050 * The close entry point is called when an interface is de-activated
2051 * by the OS. The hardware is still under the drivers control, but
2052 * needs to be disabled. A global MAC reset is issued to stop the
2053 * hardware, and all transmit and receive resources are freed.
2054 */
2055 static int atl1e_close(struct net_device *netdev)
2056 {
2057 struct atl1e_adapter *adapter = netdev_priv(netdev);
2058
2059 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2060 atl1e_down(adapter);
2061 atl1e_free_irq(adapter);
2062 atl1e_free_ring_resources(adapter);
2063
2064 return 0;
2065 }
2066
2067 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2068 {
2069 struct net_device *netdev = pci_get_drvdata(pdev);
2070 struct atl1e_adapter *adapter = netdev_priv(netdev);
2071 struct atl1e_hw *hw = &adapter->hw;
2072 u32 ctrl = 0;
2073 u32 mac_ctrl_data = 0;
2074 u32 wol_ctrl_data = 0;
2075 u16 mii_advertise_data = 0;
2076 u16 mii_bmsr_data = 0;
2077 u16 mii_intr_status_data = 0;
2078 u32 wufc = adapter->wol;
2079 u32 i;
2080 #ifdef CONFIG_PM
2081 int retval = 0;
2082 #endif
2083
2084 if (netif_running(netdev)) {
2085 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2086 atl1e_down(adapter);
2087 }
2088 netif_device_detach(netdev);
2089
2090 #ifdef CONFIG_PM
2091 retval = pci_save_state(pdev);
2092 if (retval)
2093 return retval;
2094 #endif
2095
2096 if (wufc) {
2097 /* get link status */
2098 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2099 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2100
2101 mii_advertise_data = ADVERTISE_10HALF;
2102
2103 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2104 (atl1e_write_phy_reg(hw,
2105 MII_ADVERTISE, mii_advertise_data) != 0) ||
2106 (atl1e_phy_commit(hw)) != 0) {
2107 netdev_dbg(adapter->netdev, "set phy register failed\n");
2108 goto wol_dis;
2109 }
2110
2111 hw->phy_configured = false; /* re-init PHY when resume */
2112
2113 /* turn on magic packet wol */
2114 if (wufc & AT_WUFC_MAG)
2115 wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2116
2117 if (wufc & AT_WUFC_LNKC) {
2118 /* if orignal link status is link, just wait for retrive link */
2119 if (mii_bmsr_data & BMSR_LSTATUS) {
2120 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2121 msleep(100);
2122 atl1e_read_phy_reg(hw, MII_BMSR,
2123 &mii_bmsr_data);
2124 if (mii_bmsr_data & BMSR_LSTATUS)
2125 break;
2126 }
2127
2128 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2129 netdev_dbg(adapter->netdev,
2130 "Link may change when suspend\n");
2131 }
2132 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2133 /* only link up can wake up */
2134 if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2135 netdev_dbg(adapter->netdev,
2136 "read write phy register failed\n");
2137 goto wol_dis;
2138 }
2139 }
2140 /* clear phy interrupt */
2141 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2142 /* Config MAC Ctrl register */
2143 mac_ctrl_data = MAC_CTRL_RX_EN;
2144 /* set to 10/100M halt duplex */
2145 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2146 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2147 MAC_CTRL_PRMLEN_MASK) <<
2148 MAC_CTRL_PRMLEN_SHIFT);
2149
2150 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2151
2152 /* magic packet maybe Broadcast&multicast&Unicast frame */
2153 if (wufc & AT_WUFC_MAG)
2154 mac_ctrl_data |= MAC_CTRL_BC_EN;
2155
2156 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2157 mac_ctrl_data);
2158
2159 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2160 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2161 /* pcie patch */
2162 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2163 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2164 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2165 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2166 goto suspend_exit;
2167 }
2168 wol_dis:
2169
2170 /* WOL disabled */
2171 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2172
2173 /* pcie patch */
2174 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2175 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2176 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2177
2178 atl1e_force_ps(hw);
2179 hw->phy_configured = false; /* re-init PHY when resume */
2180
2181 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2182
2183 suspend_exit:
2184
2185 if (netif_running(netdev))
2186 atl1e_free_irq(adapter);
2187
2188 pci_disable_device(pdev);
2189
2190 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2191
2192 return 0;
2193 }
2194
2195 #ifdef CONFIG_PM
2196 static int atl1e_resume(struct pci_dev *pdev)
2197 {
2198 struct net_device *netdev = pci_get_drvdata(pdev);
2199 struct atl1e_adapter *adapter = netdev_priv(netdev);
2200 u32 err;
2201
2202 pci_set_power_state(pdev, PCI_D0);
2203 pci_restore_state(pdev);
2204
2205 err = pci_enable_device(pdev);
2206 if (err) {
2207 netdev_err(adapter->netdev,
2208 "Cannot enable PCI device from suspend\n");
2209 return err;
2210 }
2211
2212 pci_set_master(pdev);
2213
2214 AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2215
2216 pci_enable_wake(pdev, PCI_D3hot, 0);
2217 pci_enable_wake(pdev, PCI_D3cold, 0);
2218
2219 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2220
2221 if (netif_running(netdev)) {
2222 err = atl1e_request_irq(adapter);
2223 if (err)
2224 return err;
2225 }
2226
2227 atl1e_reset_hw(&adapter->hw);
2228
2229 if (netif_running(netdev))
2230 atl1e_up(adapter);
2231
2232 netif_device_attach(netdev);
2233
2234 return 0;
2235 }
2236 #endif
2237
2238 static void atl1e_shutdown(struct pci_dev *pdev)
2239 {
2240 atl1e_suspend(pdev, PMSG_SUSPEND);
2241 }
2242
2243 static const struct net_device_ops atl1e_netdev_ops = {
2244 .ndo_open = atl1e_open,
2245 .ndo_stop = atl1e_close,
2246 .ndo_start_xmit = atl1e_xmit_frame,
2247 .ndo_get_stats = atl1e_get_stats,
2248 .ndo_set_rx_mode = atl1e_set_multi,
2249 .ndo_validate_addr = eth_validate_addr,
2250 .ndo_set_mac_address = atl1e_set_mac_addr,
2251 .ndo_fix_features = atl1e_fix_features,
2252 .ndo_set_features = atl1e_set_features,
2253 .ndo_change_mtu = atl1e_change_mtu,
2254 .ndo_do_ioctl = atl1e_ioctl,
2255 .ndo_tx_timeout = atl1e_tx_timeout,
2256 #ifdef CONFIG_NET_POLL_CONTROLLER
2257 .ndo_poll_controller = atl1e_netpoll,
2258 #endif
2259
2260 };
2261
2262 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2263 {
2264 SET_NETDEV_DEV(netdev, &pdev->dev);
2265 pci_set_drvdata(pdev, netdev);
2266
2267 netdev->netdev_ops = &atl1e_netdev_ops;
2268
2269 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2270 /* MTU range: 42 - 8170 */
2271 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2272 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2273 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2274 atl1e_set_ethtool_ops(netdev);
2275
2276 netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2277 NETIF_F_HW_VLAN_CTAG_RX;
2278 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2279 /* not enabled by default */
2280 netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2281 return 0;
2282 }
2283
2284 /**
2285 * atl1e_probe - Device Initialization Routine
2286 * @pdev: PCI device information struct
2287 * @ent: entry in atl1e_pci_tbl
2288 *
2289 * Returns 0 on success, negative on failure
2290 *
2291 * atl1e_probe initializes an adapter identified by a pci_dev structure.
2292 * The OS initialization, configuring of the adapter private structure,
2293 * and a hardware reset occur.
2294 */
2295 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2296 {
2297 struct net_device *netdev;
2298 struct atl1e_adapter *adapter = NULL;
2299 static int cards_found;
2300
2301 int err = 0;
2302
2303 err = pci_enable_device(pdev);
2304 if (err) {
2305 dev_err(&pdev->dev, "cannot enable PCI device\n");
2306 return err;
2307 }
2308
2309 /*
2310 * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2311 * shared register for the high 32 bits, so only a single, aligned,
2312 * 4 GB physical address range can be used at a time.
2313 *
2314 * Supporting 64-bit DMA on this hardware is more trouble than it's
2315 * worth. It is far easier to limit to 32-bit DMA than update
2316 * various kernel subsystems to support the mechanics required by a
2317 * fixed-high-32-bit system.
2318 */
2319 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2320 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2321 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2322 goto err_dma;
2323 }
2324
2325 err = pci_request_regions(pdev, atl1e_driver_name);
2326 if (err) {
2327 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2328 goto err_pci_reg;
2329 }
2330
2331 pci_set_master(pdev);
2332
2333 netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2334 if (netdev == NULL) {
2335 err = -ENOMEM;
2336 goto err_alloc_etherdev;
2337 }
2338
2339 err = atl1e_init_netdev(netdev, pdev);
2340 if (err) {
2341 netdev_err(netdev, "init netdevice failed\n");
2342 goto err_init_netdev;
2343 }
2344 adapter = netdev_priv(netdev);
2345 adapter->bd_number = cards_found;
2346 adapter->netdev = netdev;
2347 adapter->pdev = pdev;
2348 adapter->hw.adapter = adapter;
2349 adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2350 if (!adapter->hw.hw_addr) {
2351 err = -EIO;
2352 netdev_err(netdev, "cannot map device registers\n");
2353 goto err_ioremap;
2354 }
2355
2356 /* init mii data */
2357 adapter->mii.dev = netdev;
2358 adapter->mii.mdio_read = atl1e_mdio_read;
2359 adapter->mii.mdio_write = atl1e_mdio_write;
2360 adapter->mii.phy_id_mask = 0x1f;
2361 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2362
2363 netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2364
2365 timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);
2366
2367 /* get user settings */
2368 atl1e_check_options(adapter);
2369 /*
2370 * Mark all PCI regions associated with PCI device
2371 * pdev as being reserved by owner atl1e_driver_name
2372 * Enables bus-mastering on the device and calls
2373 * pcibios_set_master to do the needed arch specific settings
2374 */
2375 atl1e_setup_pcicmd(pdev);
2376 /* setup the private structure */
2377 err = atl1e_sw_init(adapter);
2378 if (err) {
2379 netdev_err(netdev, "net device private data init failed\n");
2380 goto err_sw_init;
2381 }
2382
2383 /* Init GPHY as early as possible due to power saving issue */
2384 atl1e_phy_init(&adapter->hw);
2385 /* reset the controller to
2386 * put the device in a known good starting state */
2387 err = atl1e_reset_hw(&adapter->hw);
2388 if (err) {
2389 err = -EIO;
2390 goto err_reset;
2391 }
2392
2393 if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2394 err = -EIO;
2395 netdev_err(netdev, "get mac address failed\n");
2396 goto err_eeprom;
2397 }
2398
2399 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2400 netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2401
2402 INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2403 INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2404 netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2405 err = register_netdev(netdev);
2406 if (err) {
2407 netdev_err(netdev, "register netdevice failed\n");
2408 goto err_register;
2409 }
2410
2411 /* assume we have no link for now */
2412 netif_stop_queue(netdev);
2413 netif_carrier_off(netdev);
2414
2415 cards_found++;
2416
2417 return 0;
2418
2419 err_reset:
2420 err_register:
2421 err_sw_init:
2422 err_eeprom:
2423 pci_iounmap(pdev, adapter->hw.hw_addr);
2424 err_init_netdev:
2425 err_ioremap:
2426 free_netdev(netdev);
2427 err_alloc_etherdev:
2428 pci_release_regions(pdev);
2429 err_pci_reg:
2430 err_dma:
2431 pci_disable_device(pdev);
2432 return err;
2433 }
2434
2435 /**
2436 * atl1e_remove - Device Removal Routine
2437 * @pdev: PCI device information struct
2438 *
2439 * atl1e_remove is called by the PCI subsystem to alert the driver
2440 * that it should release a PCI device. The could be caused by a
2441 * Hot-Plug event, or because the driver is going to be removed from
2442 * memory.
2443 */
2444 static void atl1e_remove(struct pci_dev *pdev)
2445 {
2446 struct net_device *netdev = pci_get_drvdata(pdev);
2447 struct atl1e_adapter *adapter = netdev_priv(netdev);
2448
2449 /*
2450 * flush_scheduled work may reschedule our watchdog task, so
2451 * explicitly disable watchdog tasks from being rescheduled
2452 */
2453 set_bit(__AT_DOWN, &adapter->flags);
2454
2455 atl1e_del_timer(adapter);
2456 atl1e_cancel_work(adapter);
2457
2458 unregister_netdev(netdev);
2459 atl1e_free_ring_resources(adapter);
2460 atl1e_force_ps(&adapter->hw);
2461 pci_iounmap(pdev, adapter->hw.hw_addr);
2462 pci_release_regions(pdev);
2463 free_netdev(netdev);
2464 pci_disable_device(pdev);
2465 }
2466
2467 /**
2468 * atl1e_io_error_detected - called when PCI error is detected
2469 * @pdev: Pointer to PCI device
2470 * @state: The current pci connection state
2471 *
2472 * This function is called after a PCI bus error affecting
2473 * this device has been detected.
2474 */
2475 static pci_ers_result_t
2476 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2477 {
2478 struct net_device *netdev = pci_get_drvdata(pdev);
2479 struct atl1e_adapter *adapter = netdev_priv(netdev);
2480
2481 netif_device_detach(netdev);
2482
2483 if (state == pci_channel_io_perm_failure)
2484 return PCI_ERS_RESULT_DISCONNECT;
2485
2486 if (netif_running(netdev))
2487 atl1e_down(adapter);
2488
2489 pci_disable_device(pdev);
2490
2491 /* Request a slot slot reset. */
2492 return PCI_ERS_RESULT_NEED_RESET;
2493 }
2494
2495 /**
2496 * atl1e_io_slot_reset - called after the pci bus has been reset.
2497 * @pdev: Pointer to PCI device
2498 *
2499 * Restart the card from scratch, as if from a cold-boot. Implementation
2500 * resembles the first-half of the e1000_resume routine.
2501 */
2502 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2503 {
2504 struct net_device *netdev = pci_get_drvdata(pdev);
2505 struct atl1e_adapter *adapter = netdev_priv(netdev);
2506
2507 if (pci_enable_device(pdev)) {
2508 netdev_err(adapter->netdev,
2509 "Cannot re-enable PCI device after reset\n");
2510 return PCI_ERS_RESULT_DISCONNECT;
2511 }
2512 pci_set_master(pdev);
2513
2514 pci_enable_wake(pdev, PCI_D3hot, 0);
2515 pci_enable_wake(pdev, PCI_D3cold, 0);
2516
2517 atl1e_reset_hw(&adapter->hw);
2518
2519 return PCI_ERS_RESULT_RECOVERED;
2520 }
2521
2522 /**
2523 * atl1e_io_resume - called when traffic can start flowing again.
2524 * @pdev: Pointer to PCI device
2525 *
2526 * This callback is called when the error recovery driver tells us that
2527 * its OK to resume normal operation. Implementation resembles the
2528 * second-half of the atl1e_resume routine.
2529 */
2530 static void atl1e_io_resume(struct pci_dev *pdev)
2531 {
2532 struct net_device *netdev = pci_get_drvdata(pdev);
2533 struct atl1e_adapter *adapter = netdev_priv(netdev);
2534
2535 if (netif_running(netdev)) {
2536 if (atl1e_up(adapter)) {
2537 netdev_err(adapter->netdev,
2538 "can't bring device back up after reset\n");
2539 return;
2540 }
2541 }
2542
2543 netif_device_attach(netdev);
2544 }
2545
2546 static const struct pci_error_handlers atl1e_err_handler = {
2547 .error_detected = atl1e_io_error_detected,
2548 .slot_reset = atl1e_io_slot_reset,
2549 .resume = atl1e_io_resume,
2550 };
2551
2552 static struct pci_driver atl1e_driver = {
2553 .name = atl1e_driver_name,
2554 .id_table = atl1e_pci_tbl,
2555 .probe = atl1e_probe,
2556 .remove = atl1e_remove,
2557 /* Power Management Hooks */
2558 #ifdef CONFIG_PM
2559 .suspend = atl1e_suspend,
2560 .resume = atl1e_resume,
2561 #endif
2562 .shutdown = atl1e_shutdown,
2563 .err_handler = &atl1e_err_handler
2564 };
2565
2566 module_pci_driver(atl1e_driver);
Linux with added FPC-III support