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Staging: hv: mousevsc: Cleanup and properly implement reportdesc_callback()
[zen-stable.git] / drivers / net / atl1e / atl1e_main.c
blobd8d411998fa332f8d951371ff4676836ca4e9152
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 DEFINE_PCI_DEVICE_TABLE(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(unsigned long data)
134 {
135 struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
136 struct atl1e_hw *hw = &adapter->hw;
137 unsigned long flags;
138
139 spin_lock_irqsave(&adapter->mdio_lock, flags);
140 atl1e_restart_autoneg(hw);
141 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
142 }
143
144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
145 {
146
147 WARN_ON(in_interrupt());
148 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
149 msleep(1);
150 atl1e_down(adapter);
151 atl1e_up(adapter);
152 clear_bit(__AT_RESETTING, &adapter->flags);
153 }
154
155 static void atl1e_reset_task(struct work_struct *work)
156 {
157 struct atl1e_adapter *adapter;
158 adapter = container_of(work, struct atl1e_adapter, reset_task);
159
160 atl1e_reinit_locked(adapter);
161 }
162
163 static int atl1e_check_link(struct atl1e_adapter *adapter)
164 {
165 struct atl1e_hw *hw = &adapter->hw;
166 struct net_device *netdev = adapter->netdev;
167 int err = 0;
168 u16 speed, duplex, phy_data;
169
170 /* MII_BMSR must read twice */
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 netdev_info(netdev,
198 "NIC Link is Up <%d Mbps %s Duplex>\n",
199 adapter->link_speed,
200 adapter->link_duplex == FULL_DUPLEX ?
201 "Full" : "Half");
202 }
203
204 if (!netif_carrier_ok(netdev)) {
205 /* Link down -> Up */
206 netif_carrier_on(netdev);
207 netif_wake_queue(netdev);
208 }
209 }
210 return 0;
211 }
212
213 /*
214 * atl1e_link_chg_task - deal with link change event Out of interrupt context
215 * @netdev: network interface device structure
216 */
217 static void atl1e_link_chg_task(struct work_struct *work)
218 {
219 struct atl1e_adapter *adapter;
220 unsigned long flags;
221
222 adapter = container_of(work, struct atl1e_adapter, link_chg_task);
223 spin_lock_irqsave(&adapter->mdio_lock, flags);
224 atl1e_check_link(adapter);
225 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
226 }
227
228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
229 {
230 struct net_device *netdev = adapter->netdev;
231 u16 phy_data = 0;
232 u16 link_up = 0;
233
234 spin_lock(&adapter->mdio_lock);
235 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
236 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
237 spin_unlock(&adapter->mdio_lock);
238 link_up = phy_data & BMSR_LSTATUS;
239 /* notify upper layer link down ASAP */
240 if (!link_up) {
241 if (netif_carrier_ok(netdev)) {
242 /* old link state: Up */
243 netdev_info(netdev, "NIC Link is Down\n");
244 adapter->link_speed = SPEED_0;
245 netif_stop_queue(netdev);
246 }
247 }
248 schedule_work(&adapter->link_chg_task);
249 }
250
251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
252 {
253 del_timer_sync(&adapter->phy_config_timer);
254 }
255
256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
257 {
258 cancel_work_sync(&adapter->reset_task);
259 cancel_work_sync(&adapter->link_chg_task);
260 }
261
262 /*
263 * atl1e_tx_timeout - Respond to a Tx Hang
264 * @netdev: network interface device structure
265 */
266 static void atl1e_tx_timeout(struct net_device *netdev)
267 {
268 struct atl1e_adapter *adapter = netdev_priv(netdev);
269
270 /* Do the reset outside of interrupt context */
271 schedule_work(&adapter->reset_task);
272 }
273
274 /*
275 * atl1e_set_multi - Multicast and Promiscuous mode set
276 * @netdev: network interface device structure
277 *
278 * The set_multi entry point is called whenever the multicast address
279 * list or the network interface flags are updated. This routine is
280 * responsible for configuring the hardware for proper multicast,
281 * promiscuous mode, and all-multi behavior.
282 */
283 static void atl1e_set_multi(struct net_device *netdev)
284 {
285 struct atl1e_adapter *adapter = netdev_priv(netdev);
286 struct atl1e_hw *hw = &adapter->hw;
287 struct netdev_hw_addr *ha;
288 u32 mac_ctrl_data = 0;
289 u32 hash_value;
290
291 /* Check for Promiscuous and All Multicast modes */
292 mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
293
294 if (netdev->flags & IFF_PROMISC) {
295 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
296 } else if (netdev->flags & IFF_ALLMULTI) {
297 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
298 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
299 } else {
300 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
301 }
302
303 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
304
305 /* clear the old settings from the multicast hash table */
306 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
307 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
308
309 /* comoute mc addresses' hash value ,and put it into hash table */
310 netdev_for_each_mc_addr(ha, netdev) {
311 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
312 atl1e_hash_set(hw, hash_value);
313 }
314 }
315
316 static void __atl1e_vlan_mode(u32 features, u32 *mac_ctrl_data)
317 {
318 if (features & NETIF_F_HW_VLAN_RX) {
319 /* enable VLAN tag insert/strip */
320 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
321 } else {
322 /* disable VLAN tag insert/strip */
323 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
324 }
325 }
326
327 static void atl1e_vlan_mode(struct net_device *netdev, u32 features)
328 {
329 struct atl1e_adapter *adapter = netdev_priv(netdev);
330 u32 mac_ctrl_data = 0;
331
332 netdev_dbg(adapter->netdev, "%s\n", __func__);
333
334 atl1e_irq_disable(adapter);
335 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
336 __atl1e_vlan_mode(features, &mac_ctrl_data);
337 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
338 atl1e_irq_enable(adapter);
339 }
340
341 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
342 {
343 netdev_dbg(adapter->netdev, "%s\n", __func__);
344 atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
345 }
346
347 /*
348 * atl1e_set_mac - Change the Ethernet Address of the NIC
349 * @netdev: network interface device structure
350 * @p: pointer to an address structure
351 *
352 * Returns 0 on success, negative on failure
353 */
354 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
355 {
356 struct atl1e_adapter *adapter = netdev_priv(netdev);
357 struct sockaddr *addr = p;
358
359 if (!is_valid_ether_addr(addr->sa_data))
360 return -EADDRNOTAVAIL;
361
362 if (netif_running(netdev))
363 return -EBUSY;
364
365 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
366 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
367
368 atl1e_hw_set_mac_addr(&adapter->hw);
369
370 return 0;
371 }
372
373 static u32 atl1e_fix_features(struct net_device *netdev, u32 features)
374 {
375 /*
376 * Since there is no support for separate rx/tx vlan accel
377 * enable/disable make sure tx flag is always in same state as rx.
378 */
379 if (features & NETIF_F_HW_VLAN_RX)
380 features |= NETIF_F_HW_VLAN_TX;
381 else
382 features &= ~NETIF_F_HW_VLAN_TX;
383
384 return features;
385 }
386
387 static int atl1e_set_features(struct net_device *netdev, u32 features)
388 {
389 u32 changed = netdev->features ^ features;
390
391 if (changed & NETIF_F_HW_VLAN_RX)
392 atl1e_vlan_mode(netdev, features);
393
394 return 0;
395 }
396
397 /*
398 * atl1e_change_mtu - Change the Maximum Transfer Unit
399 * @netdev: network interface device structure
400 * @new_mtu: new value for maximum frame size
401 *
402 * Returns 0 on success, negative on failure
403 */
404 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
405 {
406 struct atl1e_adapter *adapter = netdev_priv(netdev);
407 int old_mtu = netdev->mtu;
408 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
409
410 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
411 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
412 netdev_warn(adapter->netdev, "invalid MTU setting\n");
413 return -EINVAL;
414 }
415 /* set MTU */
416 if (old_mtu != new_mtu && netif_running(netdev)) {
417 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
418 msleep(1);
419 netdev->mtu = new_mtu;
420 adapter->hw.max_frame_size = new_mtu;
421 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
422 atl1e_down(adapter);
423 atl1e_up(adapter);
424 clear_bit(__AT_RESETTING, &adapter->flags);
425 }
426 return 0;
427 }
428
429 /*
430 * caller should hold mdio_lock
431 */
432 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
433 {
434 struct atl1e_adapter *adapter = netdev_priv(netdev);
435 u16 result;
436
437 atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
438 return result;
439 }
440
441 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
442 int reg_num, int val)
443 {
444 struct atl1e_adapter *adapter = netdev_priv(netdev);
445
446 atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
447 }
448
449 /*
450 * atl1e_mii_ioctl -
451 * @netdev:
452 * @ifreq:
453 * @cmd:
454 */
455 static int atl1e_mii_ioctl(struct net_device *netdev,
456 struct ifreq *ifr, int cmd)
457 {
458 struct atl1e_adapter *adapter = netdev_priv(netdev);
459 struct mii_ioctl_data *data = if_mii(ifr);
460 unsigned long flags;
461 int retval = 0;
462
463 if (!netif_running(netdev))
464 return -EINVAL;
465
466 spin_lock_irqsave(&adapter->mdio_lock, flags);
467 switch (cmd) {
468 case SIOCGMIIPHY:
469 data->phy_id = 0;
470 break;
471
472 case SIOCGMIIREG:
473 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
474 &data->val_out)) {
475 retval = -EIO;
476 goto out;
477 }
478 break;
479
480 case SIOCSMIIREG:
481 if (data->reg_num & ~(0x1F)) {
482 retval = -EFAULT;
483 goto out;
484 }
485
486 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
487 data->reg_num, data->val_in);
488 if (atl1e_write_phy_reg(&adapter->hw,
489 data->reg_num, data->val_in)) {
490 retval = -EIO;
491 goto out;
492 }
493 break;
494
495 default:
496 retval = -EOPNOTSUPP;
497 break;
498 }
499 out:
500 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
501 return retval;
502
503 }
504
505 /*
506 * atl1e_ioctl -
507 * @netdev:
508 * @ifreq:
509 * @cmd:
510 */
511 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
512 {
513 switch (cmd) {
514 case SIOCGMIIPHY:
515 case SIOCGMIIREG:
516 case SIOCSMIIREG:
517 return atl1e_mii_ioctl(netdev, ifr, cmd);
518 default:
519 return -EOPNOTSUPP;
520 }
521 }
522
523 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
524 {
525 u16 cmd;
526
527 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
528 cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
529 cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
530 pci_write_config_word(pdev, PCI_COMMAND, cmd);
531
532 /*
533 * some motherboards BIOS(PXE/EFI) driver may set PME
534 * while they transfer control to OS (Windows/Linux)
535 * so we should clear this bit before NIC work normally
536 */
537 pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
538 msleep(1);
539 }
540
541 /*
542 * atl1e_alloc_queues - Allocate memory for all rings
543 * @adapter: board private structure to initialize
544 *
545 */
546 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
547 {
548 return 0;
549 }
550
551 /*
552 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
553 * @adapter: board private structure to initialize
554 *
555 * atl1e_sw_init initializes the Adapter private data structure.
556 * Fields are initialized based on PCI device information and
557 * OS network device settings (MTU size).
558 */
559 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
560 {
561 struct atl1e_hw *hw = &adapter->hw;
562 struct pci_dev *pdev = adapter->pdev;
563 u32 phy_status_data = 0;
564
565 adapter->wol = 0;
566 adapter->link_speed = SPEED_0; /* hardware init */
567 adapter->link_duplex = FULL_DUPLEX;
568 adapter->num_rx_queues = 1;
569
570 /* PCI config space info */
571 hw->vendor_id = pdev->vendor;
572 hw->device_id = pdev->device;
573 hw->subsystem_vendor_id = pdev->subsystem_vendor;
574 hw->subsystem_id = pdev->subsystem_device;
575 hw->revision_id = pdev->revision;
576
577 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
578
579 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
580 /* nic type */
581 if (hw->revision_id >= 0xF0) {
582 hw->nic_type = athr_l2e_revB;
583 } else {
584 if (phy_status_data & PHY_STATUS_100M)
585 hw->nic_type = athr_l1e;
586 else
587 hw->nic_type = athr_l2e_revA;
588 }
589
590 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
591
592 if (phy_status_data & PHY_STATUS_EMI_CA)
593 hw->emi_ca = true;
594 else
595 hw->emi_ca = false;
596
597 hw->phy_configured = false;
598 hw->preamble_len = 7;
599 hw->max_frame_size = adapter->netdev->mtu;
600 hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
601 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
602
603 hw->rrs_type = atl1e_rrs_disable;
604 hw->indirect_tab = 0;
605 hw->base_cpu = 0;
606
607 /* need confirm */
608
609 hw->ict = 50000; /* 100ms */
610 hw->smb_timer = 200000; /* 200ms */
611 hw->tpd_burst = 5;
612 hw->rrd_thresh = 1;
613 hw->tpd_thresh = adapter->tx_ring.count / 2;
614 hw->rx_count_down = 4; /* 2us resolution */
615 hw->tx_count_down = hw->imt * 4 / 3;
616 hw->dmar_block = atl1e_dma_req_1024;
617 hw->dmaw_block = atl1e_dma_req_1024;
618 hw->dmar_dly_cnt = 15;
619 hw->dmaw_dly_cnt = 4;
620
621 if (atl1e_alloc_queues(adapter)) {
622 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
623 return -ENOMEM;
624 }
625
626 atomic_set(&adapter->irq_sem, 1);
627 spin_lock_init(&adapter->mdio_lock);
628 spin_lock_init(&adapter->tx_lock);
629
630 set_bit(__AT_DOWN, &adapter->flags);
631
632 return 0;
633 }
634
635 /*
636 * atl1e_clean_tx_ring - Free Tx-skb
637 * @adapter: board private structure
638 */
639 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
640 {
641 struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
642 &adapter->tx_ring;
643 struct atl1e_tx_buffer *tx_buffer = NULL;
644 struct pci_dev *pdev = adapter->pdev;
645 u16 index, ring_count;
646
647 if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
648 return;
649
650 ring_count = tx_ring->count;
651 /* first unmmap dma */
652 for (index = 0; index < ring_count; index++) {
653 tx_buffer = &tx_ring->tx_buffer[index];
654 if (tx_buffer->dma) {
655 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
656 pci_unmap_single(pdev, tx_buffer->dma,
657 tx_buffer->length, PCI_DMA_TODEVICE);
658 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
659 pci_unmap_page(pdev, tx_buffer->dma,
660 tx_buffer->length, PCI_DMA_TODEVICE);
661 tx_buffer->dma = 0;
662 }
663 }
664 /* second free skb */
665 for (index = 0; index < ring_count; index++) {
666 tx_buffer = &tx_ring->tx_buffer[index];
667 if (tx_buffer->skb) {
668 dev_kfree_skb_any(tx_buffer->skb);
669 tx_buffer->skb = NULL;
670 }
671 }
672 /* Zero out Tx-buffers */
673 memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
674 ring_count);
675 memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
676 ring_count);
677 }
678
679 /*
680 * atl1e_clean_rx_ring - Free rx-reservation skbs
681 * @adapter: board private structure
682 */
683 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
684 {
685 struct atl1e_rx_ring *rx_ring =
686 (struct atl1e_rx_ring *)&adapter->rx_ring;
687 struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
688 u16 i, j;
689
690
691 if (adapter->ring_vir_addr == NULL)
692 return;
693 /* Zero out the descriptor ring */
694 for (i = 0; i < adapter->num_rx_queues; i++) {
695 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
696 if (rx_page_desc[i].rx_page[j].addr != NULL) {
697 memset(rx_page_desc[i].rx_page[j].addr, 0,
698 rx_ring->real_page_size);
699 }
700 }
701 }
702 }
703
704 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
705 {
706 *ring_size = ((u32)(adapter->tx_ring.count *
707 sizeof(struct atl1e_tpd_desc) + 7
708 /* tx ring, qword align */
709 + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
710 adapter->num_rx_queues + 31
711 /* rx ring, 32 bytes align */
712 + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
713 sizeof(u32) + 3));
714 /* tx, rx cmd, dword align */
715 }
716
717 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
718 {
719 struct atl1e_rx_ring *rx_ring = NULL;
720
721 rx_ring = &adapter->rx_ring;
722
723 rx_ring->real_page_size = adapter->rx_ring.page_size
724 + adapter->hw.max_frame_size
725 + ETH_HLEN + VLAN_HLEN
726 + ETH_FCS_LEN;
727 rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
728 atl1e_cal_ring_size(adapter, &adapter->ring_size);
729
730 adapter->ring_vir_addr = NULL;
731 adapter->rx_ring.desc = NULL;
732 rwlock_init(&adapter->tx_ring.tx_lock);
733 }
734
735 /*
736 * Read / Write Ptr Initialize:
737 */
738 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
739 {
740 struct atl1e_tx_ring *tx_ring = NULL;
741 struct atl1e_rx_ring *rx_ring = NULL;
742 struct atl1e_rx_page_desc *rx_page_desc = NULL;
743 int i, j;
744
745 tx_ring = &adapter->tx_ring;
746 rx_ring = &adapter->rx_ring;
747 rx_page_desc = rx_ring->rx_page_desc;
748
749 tx_ring->next_to_use = 0;
750 atomic_set(&tx_ring->next_to_clean, 0);
751
752 for (i = 0; i < adapter->num_rx_queues; i++) {
753 rx_page_desc[i].rx_using = 0;
754 rx_page_desc[i].rx_nxseq = 0;
755 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
756 *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
757 rx_page_desc[i].rx_page[j].read_offset = 0;
758 }
759 }
760 }
761
762 /*
763 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
764 * @adapter: board private structure
765 *
766 * Free all transmit software resources
767 */
768 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
769 {
770 struct pci_dev *pdev = adapter->pdev;
771
772 atl1e_clean_tx_ring(adapter);
773 atl1e_clean_rx_ring(adapter);
774
775 if (adapter->ring_vir_addr) {
776 pci_free_consistent(pdev, adapter->ring_size,
777 adapter->ring_vir_addr, adapter->ring_dma);
778 adapter->ring_vir_addr = NULL;
779 }
780
781 if (adapter->tx_ring.tx_buffer) {
782 kfree(adapter->tx_ring.tx_buffer);
783 adapter->tx_ring.tx_buffer = NULL;
784 }
785 }
786
787 /*
788 * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
789 * @adapter: board private structure
790 *
791 * Return 0 on success, negative on failure
792 */
793 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
794 {
795 struct pci_dev *pdev = adapter->pdev;
796 struct atl1e_tx_ring *tx_ring;
797 struct atl1e_rx_ring *rx_ring;
798 struct atl1e_rx_page_desc *rx_page_desc;
799 int size, i, j;
800 u32 offset = 0;
801 int err = 0;
802
803 if (adapter->ring_vir_addr != NULL)
804 return 0; /* alloced already */
805
806 tx_ring = &adapter->tx_ring;
807 rx_ring = &adapter->rx_ring;
808
809 /* real ring DMA buffer */
810
811 size = adapter->ring_size;
812 adapter->ring_vir_addr = pci_alloc_consistent(pdev,
813 adapter->ring_size, &adapter->ring_dma);
814
815 if (adapter->ring_vir_addr == NULL) {
816 netdev_err(adapter->netdev,
817 "pci_alloc_consistent failed, size = D%d\n", size);
818 return -ENOMEM;
819 }
820
821 memset(adapter->ring_vir_addr, 0, adapter->ring_size);
822
823 rx_page_desc = rx_ring->rx_page_desc;
824
825 /* Init TPD Ring */
826 tx_ring->dma = roundup(adapter->ring_dma, 8);
827 offset = tx_ring->dma - adapter->ring_dma;
828 tx_ring->desc = adapter->ring_vir_addr + offset;
829 size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
830 tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
831 if (tx_ring->tx_buffer == NULL) {
832 netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n",
833 size);
834 err = -ENOMEM;
835 goto failed;
836 }
837
838 /* Init RXF-Pages */
839 offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
840 offset = roundup(offset, 32);
841
842 for (i = 0; i < adapter->num_rx_queues; i++) {
843 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
844 rx_page_desc[i].rx_page[j].dma =
845 adapter->ring_dma + offset;
846 rx_page_desc[i].rx_page[j].addr =
847 adapter->ring_vir_addr + offset;
848 offset += rx_ring->real_page_size;
849 }
850 }
851
852 /* Init CMB dma address */
853 tx_ring->cmb_dma = adapter->ring_dma + offset;
854 tx_ring->cmb = adapter->ring_vir_addr + offset;
855 offset += sizeof(u32);
856
857 for (i = 0; i < adapter->num_rx_queues; i++) {
858 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
859 rx_page_desc[i].rx_page[j].write_offset_dma =
860 adapter->ring_dma + offset;
861 rx_page_desc[i].rx_page[j].write_offset_addr =
862 adapter->ring_vir_addr + offset;
863 offset += sizeof(u32);
864 }
865 }
866
867 if (unlikely(offset > adapter->ring_size)) {
868 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
869 offset, adapter->ring_size);
870 err = -1;
871 goto failed;
872 }
873
874 return 0;
875 failed:
876 if (adapter->ring_vir_addr != NULL) {
877 pci_free_consistent(pdev, adapter->ring_size,
878 adapter->ring_vir_addr, adapter->ring_dma);
879 adapter->ring_vir_addr = NULL;
880 }
881 return err;
882 }
883
884 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
885 {
886
887 struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
888 struct atl1e_rx_ring *rx_ring =
889 (struct atl1e_rx_ring *)&adapter->rx_ring;
890 struct atl1e_tx_ring *tx_ring =
891 (struct atl1e_tx_ring *)&adapter->tx_ring;
892 struct atl1e_rx_page_desc *rx_page_desc = NULL;
893 int i, j;
894
895 AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
896 (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
897 AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
898 (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
899 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
900 AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
901 (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
902
903 rx_page_desc = rx_ring->rx_page_desc;
904 /* RXF Page Physical address / Page Length */
905 for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
906 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
907 (u32)((adapter->ring_dma &
908 AT_DMA_HI_ADDR_MASK) >> 32));
909 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
910 u32 page_phy_addr;
911 u32 offset_phy_addr;
912
913 page_phy_addr = rx_page_desc[i].rx_page[j].dma;
914 offset_phy_addr =
915 rx_page_desc[i].rx_page[j].write_offset_dma;
916
917 AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
918 page_phy_addr & AT_DMA_LO_ADDR_MASK);
919 AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
920 offset_phy_addr & AT_DMA_LO_ADDR_MASK);
921 AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
922 }
923 }
924 /* Page Length */
925 AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
926 /* Load all of base address above */
927 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
928 }
929
930 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
931 {
932 struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
933 u32 dev_ctrl_data = 0;
934 u32 max_pay_load = 0;
935 u32 jumbo_thresh = 0;
936 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
937
938 /* configure TXQ param */
939 if (hw->nic_type != athr_l2e_revB) {
940 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
941 if (hw->max_frame_size <= 1500) {
942 jumbo_thresh = hw->max_frame_size + extra_size;
943 } else if (hw->max_frame_size < 6*1024) {
944 jumbo_thresh =
945 (hw->max_frame_size + extra_size) * 2 / 3;
946 } else {
947 jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
948 }
949 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
950 }
951
952 dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
953
954 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
955 DEVICE_CTRL_MAX_PAYLOAD_MASK;
956
957 hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
958
959 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
960 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
961 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
962
963 if (hw->nic_type != athr_l2e_revB)
964 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
965 atl1e_pay_load_size[hw->dmar_block]);
966 /* enable TXQ */
967 AT_WRITE_REGW(hw, REG_TXQ_CTRL,
968 (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
969 << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
970 | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
971 }
972
973 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
974 {
975 struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
976 u32 rxf_len = 0;
977 u32 rxf_low = 0;
978 u32 rxf_high = 0;
979 u32 rxf_thresh_data = 0;
980 u32 rxq_ctrl_data = 0;
981
982 if (hw->nic_type != athr_l2e_revB) {
983 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
984 (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
985 RXQ_JMBOSZ_TH_SHIFT |
986 (1 & RXQ_JMBO_LKAH_MASK) <<
987 RXQ_JMBO_LKAH_SHIFT));
988
989 rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
990 rxf_high = rxf_len * 4 / 5;
991 rxf_low = rxf_len / 5;
992 rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK)
993 << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
994 ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
995 << RXQ_RXF_PAUSE_TH_LO_SHIFT);
996
997 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
998 }
999
1000 /* RRS */
1001 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1002 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1003
1004 if (hw->rrs_type & atl1e_rrs_ipv4)
1005 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1006
1007 if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1008 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1009
1010 if (hw->rrs_type & atl1e_rrs_ipv6)
1011 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1012
1013 if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1014 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1015
1016 if (hw->rrs_type != atl1e_rrs_disable)
1017 rxq_ctrl_data |=
1018 (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1019
1020 rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1021 RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1022
1023 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1024 }
1025
1026 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1027 {
1028 struct atl1e_hw *hw = &adapter->hw;
1029 u32 dma_ctrl_data = 0;
1030
1031 dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1032 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1033 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1034 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1035 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1036 dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1037 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1038 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1039 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1040 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1041
1042 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1043 }
1044
1045 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1046 {
1047 u32 value;
1048 struct atl1e_hw *hw = &adapter->hw;
1049 struct net_device *netdev = adapter->netdev;
1050
1051 /* Config MAC CTRL Register */
1052 value = MAC_CTRL_TX_EN |
1053 MAC_CTRL_RX_EN ;
1054
1055 if (FULL_DUPLEX == adapter->link_duplex)
1056 value |= MAC_CTRL_DUPLX;
1057
1058 value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1059 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1060 MAC_CTRL_SPEED_SHIFT);
1061 value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1062
1063 value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1064 value |= (((u32)adapter->hw.preamble_len &
1065 MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1066
1067 __atl1e_vlan_mode(netdev->features, &value);
1068
1069 value |= MAC_CTRL_BC_EN;
1070 if (netdev->flags & IFF_PROMISC)
1071 value |= MAC_CTRL_PROMIS_EN;
1072 if (netdev->flags & IFF_ALLMULTI)
1073 value |= MAC_CTRL_MC_ALL_EN;
1074
1075 AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1076 }
1077
1078 /*
1079 * atl1e_configure - Configure Transmit&Receive Unit after Reset
1080 * @adapter: board private structure
1081 *
1082 * Configure the Tx /Rx unit of the MAC after a reset.
1083 */
1084 static int atl1e_configure(struct atl1e_adapter *adapter)
1085 {
1086 struct atl1e_hw *hw = &adapter->hw;
1087
1088 u32 intr_status_data = 0;
1089
1090 /* clear interrupt status */
1091 AT_WRITE_REG(hw, REG_ISR, ~0);
1092
1093 /* 1. set MAC Address */
1094 atl1e_hw_set_mac_addr(hw);
1095
1096 /* 2. Init the Multicast HASH table done by set_muti */
1097
1098 /* 3. Clear any WOL status */
1099 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1100
1101 /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1102 * TPD Ring/SMB/RXF0 Page CMBs, they use the same
1103 * High 32bits memory */
1104 atl1e_configure_des_ring(adapter);
1105
1106 /* 5. set Interrupt Moderator Timer */
1107 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1108 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1109 AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1110 MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1111
1112 /* 6. rx/tx threshold to trig interrupt */
1113 AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1114 AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1115 AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1116 AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1117
1118 /* 7. set Interrupt Clear Timer */
1119 AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1120
1121 /* 8. set MTU */
1122 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1123 VLAN_HLEN + ETH_FCS_LEN);
1124
1125 /* 9. config TXQ early tx threshold */
1126 atl1e_configure_tx(adapter);
1127
1128 /* 10. config RXQ */
1129 atl1e_configure_rx(adapter);
1130
1131 /* 11. config DMA Engine */
1132 atl1e_configure_dma(adapter);
1133
1134 /* 12. smb timer to trig interrupt */
1135 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1136
1137 intr_status_data = AT_READ_REG(hw, REG_ISR);
1138 if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1139 netdev_err(adapter->netdev,
1140 "atl1e_configure failed, PCIE phy link down\n");
1141 return -1;
1142 }
1143
1144 AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1145 return 0;
1146 }
1147
1148 /*
1149 * atl1e_get_stats - Get System Network Statistics
1150 * @netdev: network interface device structure
1151 *
1152 * Returns the address of the device statistics structure.
1153 * The statistics are actually updated from the timer callback.
1154 */
1155 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1156 {
1157 struct atl1e_adapter *adapter = netdev_priv(netdev);
1158 struct atl1e_hw_stats *hw_stats = &adapter->hw_stats;
1159 struct net_device_stats *net_stats = &netdev->stats;
1160
1161 net_stats->rx_packets = hw_stats->rx_ok;
1162 net_stats->tx_packets = hw_stats->tx_ok;
1163 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1164 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1165 net_stats->multicast = hw_stats->rx_mcast;
1166 net_stats->collisions = hw_stats->tx_1_col +
1167 hw_stats->tx_2_col * 2 +
1168 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1169
1170 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1171 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1172 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1173 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1174 net_stats->rx_length_errors = hw_stats->rx_len_err;
1175 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1176 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1177 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1178
1179 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1180
1181 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1182 hw_stats->tx_underrun + hw_stats->tx_trunc;
1183 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1184 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1185 net_stats->tx_window_errors = hw_stats->tx_late_col;
1186
1187 return net_stats;
1188 }
1189
1190 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1191 {
1192 u16 hw_reg_addr = 0;
1193 unsigned long *stats_item = NULL;
1194
1195 /* update rx status */
1196 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1197 stats_item = &adapter->hw_stats.rx_ok;
1198 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1199 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1200 stats_item++;
1201 hw_reg_addr += 4;
1202 }
1203 /* update tx status */
1204 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1205 stats_item = &adapter->hw_stats.tx_ok;
1206 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1207 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1208 stats_item++;
1209 hw_reg_addr += 4;
1210 }
1211 }
1212
1213 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1214 {
1215 u16 phy_data;
1216
1217 spin_lock(&adapter->mdio_lock);
1218 atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1219 spin_unlock(&adapter->mdio_lock);
1220 }
1221
1222 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1223 {
1224 struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1225 &adapter->tx_ring;
1226 struct atl1e_tx_buffer *tx_buffer = NULL;
1227 u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1228 u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1229
1230 while (next_to_clean != hw_next_to_clean) {
1231 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1232 if (tx_buffer->dma) {
1233 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1234 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1235 tx_buffer->length, PCI_DMA_TODEVICE);
1236 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1237 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1238 tx_buffer->length, PCI_DMA_TODEVICE);
1239 tx_buffer->dma = 0;
1240 }
1241
1242 if (tx_buffer->skb) {
1243 dev_kfree_skb_irq(tx_buffer->skb);
1244 tx_buffer->skb = NULL;
1245 }
1246
1247 if (++next_to_clean == tx_ring->count)
1248 next_to_clean = 0;
1249 }
1250
1251 atomic_set(&tx_ring->next_to_clean, next_to_clean);
1252
1253 if (netif_queue_stopped(adapter->netdev) &&
1254 netif_carrier_ok(adapter->netdev)) {
1255 netif_wake_queue(adapter->netdev);
1256 }
1257
1258 return true;
1259 }
1260
1261 /*
1262 * atl1e_intr - Interrupt Handler
1263 * @irq: interrupt number
1264 * @data: pointer to a network interface device structure
1265 * @pt_regs: CPU registers structure
1266 */
1267 static irqreturn_t atl1e_intr(int irq, void *data)
1268 {
1269 struct net_device *netdev = data;
1270 struct atl1e_adapter *adapter = netdev_priv(netdev);
1271 struct atl1e_hw *hw = &adapter->hw;
1272 int max_ints = AT_MAX_INT_WORK;
1273 int handled = IRQ_NONE;
1274 u32 status;
1275
1276 do {
1277 status = AT_READ_REG(hw, REG_ISR);
1278 if ((status & IMR_NORMAL_MASK) == 0 ||
1279 (status & ISR_DIS_INT) != 0) {
1280 if (max_ints != AT_MAX_INT_WORK)
1281 handled = IRQ_HANDLED;
1282 break;
1283 }
1284 /* link event */
1285 if (status & ISR_GPHY)
1286 atl1e_clear_phy_int(adapter);
1287 /* Ack ISR */
1288 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1289
1290 handled = IRQ_HANDLED;
1291 /* check if PCIE PHY Link down */
1292 if (status & ISR_PHY_LINKDOWN) {
1293 netdev_err(adapter->netdev,
1294 "pcie phy linkdown %x\n", status);
1295 if (netif_running(adapter->netdev)) {
1296 /* reset MAC */
1297 atl1e_irq_reset(adapter);
1298 schedule_work(&adapter->reset_task);
1299 break;
1300 }
1301 }
1302
1303 /* check if DMA read/write error */
1304 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1305 netdev_err(adapter->netdev,
1306 "PCIE DMA RW error (status = 0x%x)\n",
1307 status);
1308 atl1e_irq_reset(adapter);
1309 schedule_work(&adapter->reset_task);
1310 break;
1311 }
1312
1313 if (status & ISR_SMB)
1314 atl1e_update_hw_stats(adapter);
1315
1316 /* link event */
1317 if (status & (ISR_GPHY | ISR_MANUAL)) {
1318 netdev->stats.tx_carrier_errors++;
1319 atl1e_link_chg_event(adapter);
1320 break;
1321 }
1322
1323 /* transmit event */
1324 if (status & ISR_TX_EVENT)
1325 atl1e_clean_tx_irq(adapter);
1326
1327 if (status & ISR_RX_EVENT) {
1328 /*
1329 * disable rx interrupts, without
1330 * the synchronize_irq bit
1331 */
1332 AT_WRITE_REG(hw, REG_IMR,
1333 IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1334 AT_WRITE_FLUSH(hw);
1335 if (likely(napi_schedule_prep(
1336 &adapter->napi)))
1337 __napi_schedule(&adapter->napi);
1338 }
1339 } while (--max_ints > 0);
1340 /* re-enable Interrupt*/
1341 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1342
1343 return handled;
1344 }
1345
1346 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1347 struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1348 {
1349 u8 *packet = (u8 *)(prrs + 1);
1350 struct iphdr *iph;
1351 u16 head_len = ETH_HLEN;
1352 u16 pkt_flags;
1353 u16 err_flags;
1354
1355 skb_checksum_none_assert(skb);
1356 pkt_flags = prrs->pkt_flag;
1357 err_flags = prrs->err_flag;
1358 if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1359 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1360 if (pkt_flags & RRS_IS_IPV4) {
1361 if (pkt_flags & RRS_IS_802_3)
1362 head_len += 8;
1363 iph = (struct iphdr *) (packet + head_len);
1364 if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1365 goto hw_xsum;
1366 }
1367 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1368 skb->ip_summed = CHECKSUM_UNNECESSARY;
1369 return;
1370 }
1371 }
1372
1373 hw_xsum :
1374 return;
1375 }
1376
1377 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1378 u8 que)
1379 {
1380 struct atl1e_rx_page_desc *rx_page_desc =
1381 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1382 u8 rx_using = rx_page_desc[que].rx_using;
1383
1384 return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1385 }
1386
1387 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1388 int *work_done, int work_to_do)
1389 {
1390 struct net_device *netdev = adapter->netdev;
1391 struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1392 &adapter->rx_ring;
1393 struct atl1e_rx_page_desc *rx_page_desc =
1394 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1395 struct sk_buff *skb = NULL;
1396 struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1397 u32 packet_size, write_offset;
1398 struct atl1e_recv_ret_status *prrs;
1399
1400 write_offset = *(rx_page->write_offset_addr);
1401 if (likely(rx_page->read_offset < write_offset)) {
1402 do {
1403 if (*work_done >= work_to_do)
1404 break;
1405 (*work_done)++;
1406 /* get new packet's rrs */
1407 prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1408 rx_page->read_offset);
1409 /* check sequence number */
1410 if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1411 netdev_err(netdev,
1412 "rx sequence number error (rx=%d) (expect=%d)\n",
1413 prrs->seq_num,
1414 rx_page_desc[que].rx_nxseq);
1415 rx_page_desc[que].rx_nxseq++;
1416 /* just for debug use */
1417 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1418 (((u32)prrs->seq_num) << 16) |
1419 rx_page_desc[que].rx_nxseq);
1420 goto fatal_err;
1421 }
1422 rx_page_desc[que].rx_nxseq++;
1423
1424 /* error packet */
1425 if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1426 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1427 RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1428 RRS_ERR_TRUNC)) {
1429 /* hardware error, discard this packet*/
1430 netdev_err(netdev,
1431 "rx packet desc error %x\n",
1432 *((u32 *)prrs + 1));
1433 goto skip_pkt;
1434 }
1435 }
1436
1437 packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1438 RRS_PKT_SIZE_MASK) - 4; /* CRC */
1439 skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1440 if (skb == NULL) {
1441 netdev_warn(netdev,
1442 "Memory squeeze, deferring packet\n");
1443 goto skip_pkt;
1444 }
1445 memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1446 skb_put(skb, packet_size);
1447 skb->protocol = eth_type_trans(skb, netdev);
1448 atl1e_rx_checksum(adapter, skb, prrs);
1449
1450 if (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 netdev_dbg(netdev,
1455 "RXD VLAN TAG<RRD>=0x%04x\n",
1456 prrs->vtag);
1457 __vlan_hwaccel_put_tag(skb, vlan_tag);
1458 }
1459 netif_receive_skb(skb);
1460
1461 skip_pkt:
1462 /* skip current packet whether it's ok or not. */
1463 rx_page->read_offset +=
1464 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1465 RRS_PKT_SIZE_MASK) +
1466 sizeof(struct atl1e_recv_ret_status) + 31) &
1467 0xFFFFFFE0);
1468
1469 if (rx_page->read_offset >= rx_ring->page_size) {
1470 /* mark this page clean */
1471 u16 reg_addr;
1472 u8 rx_using;
1473
1474 rx_page->read_offset =
1475 *(rx_page->write_offset_addr) = 0;
1476 rx_using = rx_page_desc[que].rx_using;
1477 reg_addr =
1478 atl1e_rx_page_vld_regs[que][rx_using];
1479 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1480 rx_page_desc[que].rx_using ^= 1;
1481 rx_page = atl1e_get_rx_page(adapter, que);
1482 }
1483 write_offset = *(rx_page->write_offset_addr);
1484 } while (rx_page->read_offset < write_offset);
1485 }
1486
1487 return;
1488
1489 fatal_err:
1490 if (!test_bit(__AT_DOWN, &adapter->flags))
1491 schedule_work(&adapter->reset_task);
1492 }
1493
1494 /*
1495 * atl1e_clean - NAPI Rx polling callback
1496 * @adapter: board private structure
1497 */
1498 static int atl1e_clean(struct napi_struct *napi, int budget)
1499 {
1500 struct atl1e_adapter *adapter =
1501 container_of(napi, struct atl1e_adapter, napi);
1502 u32 imr_data;
1503 int work_done = 0;
1504
1505 /* Keep link state information with original netdev */
1506 if (!netif_carrier_ok(adapter->netdev))
1507 goto quit_polling;
1508
1509 atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1510
1511 /* If no Tx and not enough Rx work done, exit the polling mode */
1512 if (work_done < budget) {
1513 quit_polling:
1514 napi_complete(napi);
1515 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1516 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1517 /* test debug */
1518 if (test_bit(__AT_DOWN, &adapter->flags)) {
1519 atomic_dec(&adapter->irq_sem);
1520 netdev_err(adapter->netdev,
1521 "atl1e_clean is called when AT_DOWN\n");
1522 }
1523 /* reenable RX intr */
1524 /*atl1e_irq_enable(adapter); */
1525
1526 }
1527 return work_done;
1528 }
1529
1530 #ifdef CONFIG_NET_POLL_CONTROLLER
1531
1532 /*
1533 * Polling 'interrupt' - used by things like netconsole to send skbs
1534 * without having to re-enable interrupts. It's not called while
1535 * the interrupt routine is executing.
1536 */
1537 static void atl1e_netpoll(struct net_device *netdev)
1538 {
1539 struct atl1e_adapter *adapter = netdev_priv(netdev);
1540
1541 disable_irq(adapter->pdev->irq);
1542 atl1e_intr(adapter->pdev->irq, netdev);
1543 enable_irq(adapter->pdev->irq);
1544 }
1545 #endif
1546
1547 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1548 {
1549 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1550 u16 next_to_use = 0;
1551 u16 next_to_clean = 0;
1552
1553 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1554 next_to_use = tx_ring->next_to_use;
1555
1556 return (u16)(next_to_clean > next_to_use) ?
1557 (next_to_clean - next_to_use - 1) :
1558 (tx_ring->count + next_to_clean - next_to_use - 1);
1559 }
1560
1561 /*
1562 * get next usable tpd
1563 * Note: should call atl1e_tdp_avail to make sure
1564 * there is enough tpd to use
1565 */
1566 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1567 {
1568 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1569 u16 next_to_use = 0;
1570
1571 next_to_use = tx_ring->next_to_use;
1572 if (++tx_ring->next_to_use == tx_ring->count)
1573 tx_ring->next_to_use = 0;
1574
1575 memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1576 return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1577 }
1578
1579 static struct atl1e_tx_buffer *
1580 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1581 {
1582 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1583
1584 return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1585 }
1586
1587 /* Calculate the transmit packet descript needed*/
1588 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1589 {
1590 int i = 0;
1591 u16 tpd_req = 1;
1592 u16 fg_size = 0;
1593 u16 proto_hdr_len = 0;
1594
1595 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1596 fg_size = skb_shinfo(skb)->frags[i].size;
1597 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1598 }
1599
1600 if (skb_is_gso(skb)) {
1601 if (skb->protocol == htons(ETH_P_IP) ||
1602 (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1603 proto_hdr_len = skb_transport_offset(skb) +
1604 tcp_hdrlen(skb);
1605 if (proto_hdr_len < skb_headlen(skb)) {
1606 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1607 MAX_TX_BUF_LEN - 1) >>
1608 MAX_TX_BUF_SHIFT);
1609 }
1610 }
1611
1612 }
1613 return tpd_req;
1614 }
1615
1616 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1617 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1618 {
1619 u8 hdr_len;
1620 u32 real_len;
1621 unsigned short offload_type;
1622 int err;
1623
1624 if (skb_is_gso(skb)) {
1625 if (skb_header_cloned(skb)) {
1626 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1627 if (unlikely(err))
1628 return -1;
1629 }
1630 offload_type = skb_shinfo(skb)->gso_type;
1631
1632 if (offload_type & SKB_GSO_TCPV4) {
1633 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1634 + ntohs(ip_hdr(skb)->tot_len));
1635
1636 if (real_len < skb->len)
1637 pskb_trim(skb, real_len);
1638
1639 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1640 if (unlikely(skb->len == hdr_len)) {
1641 /* only xsum need */
1642 netdev_warn(adapter->netdev,
1643 "IPV4 tso with zero data??\n");
1644 goto check_sum;
1645 } else {
1646 ip_hdr(skb)->check = 0;
1647 ip_hdr(skb)->tot_len = 0;
1648 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1649 ip_hdr(skb)->saddr,
1650 ip_hdr(skb)->daddr,
1651 0, IPPROTO_TCP, 0);
1652 tpd->word3 |= (ip_hdr(skb)->ihl &
1653 TDP_V4_IPHL_MASK) <<
1654 TPD_V4_IPHL_SHIFT;
1655 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1656 TPD_TCPHDRLEN_MASK) <<
1657 TPD_TCPHDRLEN_SHIFT;
1658 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1659 TPD_MSS_MASK) << TPD_MSS_SHIFT;
1660 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1661 }
1662 return 0;
1663 }
1664 }
1665
1666 check_sum:
1667 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1668 u8 css, cso;
1669
1670 cso = skb_checksum_start_offset(skb);
1671 if (unlikely(cso & 0x1)) {
1672 netdev_err(adapter->netdev,
1673 "payload offset should not ant event number\n");
1674 return -1;
1675 } else {
1676 css = cso + skb->csum_offset;
1677 tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1678 TPD_PLOADOFFSET_SHIFT;
1679 tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1680 TPD_CCSUMOFFSET_SHIFT;
1681 tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1682 }
1683 }
1684
1685 return 0;
1686 }
1687
1688 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1689 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1690 {
1691 struct atl1e_tpd_desc *use_tpd = NULL;
1692 struct atl1e_tx_buffer *tx_buffer = NULL;
1693 u16 buf_len = skb_headlen(skb);
1694 u16 map_len = 0;
1695 u16 mapped_len = 0;
1696 u16 hdr_len = 0;
1697 u16 nr_frags;
1698 u16 f;
1699 int segment;
1700
1701 nr_frags = skb_shinfo(skb)->nr_frags;
1702 segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1703 if (segment) {
1704 /* TSO */
1705 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1706 use_tpd = tpd;
1707
1708 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1709 tx_buffer->length = map_len;
1710 tx_buffer->dma = pci_map_single(adapter->pdev,
1711 skb->data, hdr_len, PCI_DMA_TODEVICE);
1712 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1713 mapped_len += map_len;
1714 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1715 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1716 ((cpu_to_le32(tx_buffer->length) &
1717 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1718 }
1719
1720 while (mapped_len < buf_len) {
1721 /* mapped_len == 0, means we should use the first tpd,
1722 which is given by caller */
1723 if (mapped_len == 0) {
1724 use_tpd = tpd;
1725 } else {
1726 use_tpd = atl1e_get_tpd(adapter);
1727 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1728 }
1729 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1730 tx_buffer->skb = NULL;
1731
1732 tx_buffer->length = map_len =
1733 ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1734 MAX_TX_BUF_LEN : (buf_len - mapped_len);
1735 tx_buffer->dma =
1736 pci_map_single(adapter->pdev, skb->data + mapped_len,
1737 map_len, PCI_DMA_TODEVICE);
1738 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1739 mapped_len += map_len;
1740 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1741 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1742 ((cpu_to_le32(tx_buffer->length) &
1743 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1744 }
1745
1746 for (f = 0; f < nr_frags; f++) {
1747 struct skb_frag_struct *frag;
1748 u16 i;
1749 u16 seg_num;
1750
1751 frag = &skb_shinfo(skb)->frags[f];
1752 buf_len = frag->size;
1753
1754 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1755 for (i = 0; i < seg_num; i++) {
1756 use_tpd = atl1e_get_tpd(adapter);
1757 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1758
1759 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1760 BUG_ON(tx_buffer->skb);
1761
1762 tx_buffer->skb = NULL;
1763 tx_buffer->length =
1764 (buf_len > MAX_TX_BUF_LEN) ?
1765 MAX_TX_BUF_LEN : buf_len;
1766 buf_len -= tx_buffer->length;
1767
1768 tx_buffer->dma =
1769 pci_map_page(adapter->pdev, frag->page,
1770 frag->page_offset +
1771 (i * MAX_TX_BUF_LEN),
1772 tx_buffer->length,
1773 PCI_DMA_TODEVICE);
1774 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1775 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1776 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1777 ((cpu_to_le32(tx_buffer->length) &
1778 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1779 }
1780 }
1781
1782 if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1783 /* note this one is a tcp header */
1784 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1785 /* The last tpd */
1786
1787 use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1788 /* The last buffer info contain the skb address,
1789 so it will be free after unmap */
1790 tx_buffer->skb = skb;
1791 }
1792
1793 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1794 struct atl1e_tpd_desc *tpd)
1795 {
1796 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1797 /* Force memory writes to complete before letting h/w
1798 * know there are new descriptors to fetch. (Only
1799 * applicable for weak-ordered memory model archs,
1800 * such as IA-64). */
1801 wmb();
1802 AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1803 }
1804
1805 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1806 struct net_device *netdev)
1807 {
1808 struct atl1e_adapter *adapter = netdev_priv(netdev);
1809 unsigned long flags;
1810 u16 tpd_req = 1;
1811 struct atl1e_tpd_desc *tpd;
1812
1813 if (test_bit(__AT_DOWN, &adapter->flags)) {
1814 dev_kfree_skb_any(skb);
1815 return NETDEV_TX_OK;
1816 }
1817
1818 if (unlikely(skb->len <= 0)) {
1819 dev_kfree_skb_any(skb);
1820 return NETDEV_TX_OK;
1821 }
1822 tpd_req = atl1e_cal_tdp_req(skb);
1823 if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1824 return NETDEV_TX_LOCKED;
1825
1826 if (atl1e_tpd_avail(adapter) < tpd_req) {
1827 /* no enough descriptor, just stop queue */
1828 netif_stop_queue(netdev);
1829 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1830 return NETDEV_TX_BUSY;
1831 }
1832
1833 tpd = atl1e_get_tpd(adapter);
1834
1835 if (vlan_tx_tag_present(skb)) {
1836 u16 vlan_tag = vlan_tx_tag_get(skb);
1837 u16 atl1e_vlan_tag;
1838
1839 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1840 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1841 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1842 TPD_VLAN_SHIFT;
1843 }
1844
1845 if (skb->protocol == htons(ETH_P_8021Q))
1846 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1847
1848 if (skb_network_offset(skb) != ETH_HLEN)
1849 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1850
1851 /* do TSO and check sum */
1852 if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1853 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1854 dev_kfree_skb_any(skb);
1855 return NETDEV_TX_OK;
1856 }
1857
1858 atl1e_tx_map(adapter, skb, tpd);
1859 atl1e_tx_queue(adapter, tpd_req, tpd);
1860
1861 netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1862 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1863 return NETDEV_TX_OK;
1864 }
1865
1866 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1867 {
1868 struct net_device *netdev = adapter->netdev;
1869
1870 free_irq(adapter->pdev->irq, netdev);
1871
1872 if (adapter->have_msi)
1873 pci_disable_msi(adapter->pdev);
1874 }
1875
1876 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1877 {
1878 struct pci_dev *pdev = adapter->pdev;
1879 struct net_device *netdev = adapter->netdev;
1880 int flags = 0;
1881 int err = 0;
1882
1883 adapter->have_msi = true;
1884 err = pci_enable_msi(adapter->pdev);
1885 if (err) {
1886 netdev_dbg(adapter->netdev,
1887 "Unable to allocate MSI interrupt Error: %d\n", err);
1888 adapter->have_msi = false;
1889 } else
1890 netdev->irq = pdev->irq;
1891
1892
1893 if (!adapter->have_msi)
1894 flags |= IRQF_SHARED;
1895 err = request_irq(adapter->pdev->irq, atl1e_intr, flags,
1896 netdev->name, netdev);
1897 if (err) {
1898 netdev_dbg(adapter->netdev,
1899 "Unable to allocate interrupt Error: %d\n", err);
1900 if (adapter->have_msi)
1901 pci_disable_msi(adapter->pdev);
1902 return err;
1903 }
1904 netdev_dbg(adapter->netdev, "atl1e_request_irq OK\n");
1905 return err;
1906 }
1907
1908 int atl1e_up(struct atl1e_adapter *adapter)
1909 {
1910 struct net_device *netdev = adapter->netdev;
1911 int err = 0;
1912 u32 val;
1913
1914 /* hardware has been reset, we need to reload some things */
1915 err = atl1e_init_hw(&adapter->hw);
1916 if (err) {
1917 err = -EIO;
1918 return err;
1919 }
1920 atl1e_init_ring_ptrs(adapter);
1921 atl1e_set_multi(netdev);
1922 atl1e_restore_vlan(adapter);
1923
1924 if (atl1e_configure(adapter)) {
1925 err = -EIO;
1926 goto err_up;
1927 }
1928
1929 clear_bit(__AT_DOWN, &adapter->flags);
1930 napi_enable(&adapter->napi);
1931 atl1e_irq_enable(adapter);
1932 val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1933 AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1934 val | MASTER_CTRL_MANUAL_INT);
1935
1936 err_up:
1937 return err;
1938 }
1939
1940 void atl1e_down(struct atl1e_adapter *adapter)
1941 {
1942 struct net_device *netdev = adapter->netdev;
1943
1944 /* signal that we're down so the interrupt handler does not
1945 * reschedule our watchdog timer */
1946 set_bit(__AT_DOWN, &adapter->flags);
1947
1948 netif_stop_queue(netdev);
1949
1950 /* reset MAC to disable all RX/TX */
1951 atl1e_reset_hw(&adapter->hw);
1952 msleep(1);
1953
1954 napi_disable(&adapter->napi);
1955 atl1e_del_timer(adapter);
1956 atl1e_irq_disable(adapter);
1957
1958 netif_carrier_off(netdev);
1959 adapter->link_speed = SPEED_0;
1960 adapter->link_duplex = -1;
1961 atl1e_clean_tx_ring(adapter);
1962 atl1e_clean_rx_ring(adapter);
1963 }
1964
1965 /*
1966 * atl1e_open - Called when a network interface is made active
1967 * @netdev: network interface device structure
1968 *
1969 * Returns 0 on success, negative value on failure
1970 *
1971 * The open entry point is called when a network interface is made
1972 * active by the system (IFF_UP). At this point all resources needed
1973 * for transmit and receive operations are allocated, the interrupt
1974 * handler is registered with the OS, the watchdog timer is started,
1975 * and the stack is notified that the interface is ready.
1976 */
1977 static int atl1e_open(struct net_device *netdev)
1978 {
1979 struct atl1e_adapter *adapter = netdev_priv(netdev);
1980 int err;
1981
1982 /* disallow open during test */
1983 if (test_bit(__AT_TESTING, &adapter->flags))
1984 return -EBUSY;
1985
1986 /* allocate rx/tx dma buffer & descriptors */
1987 atl1e_init_ring_resources(adapter);
1988 err = atl1e_setup_ring_resources(adapter);
1989 if (unlikely(err))
1990 return err;
1991
1992 err = atl1e_request_irq(adapter);
1993 if (unlikely(err))
1994 goto err_req_irq;
1995
1996 err = atl1e_up(adapter);
1997 if (unlikely(err))
1998 goto err_up;
1999
2000 return 0;
2001
2002 err_up:
2003 atl1e_free_irq(adapter);
2004 err_req_irq:
2005 atl1e_free_ring_resources(adapter);
2006 atl1e_reset_hw(&adapter->hw);
2007
2008 return err;
2009 }
2010
2011 /*
2012 * atl1e_close - Disables a network interface
2013 * @netdev: network interface device structure
2014 *
2015 * Returns 0, this is not allowed to fail
2016 *
2017 * The close entry point is called when an interface is de-activated
2018 * by the OS. The hardware is still under the drivers control, but
2019 * needs to be disabled. A global MAC reset is issued to stop the
2020 * hardware, and all transmit and receive resources are freed.
2021 */
2022 static int atl1e_close(struct net_device *netdev)
2023 {
2024 struct atl1e_adapter *adapter = netdev_priv(netdev);
2025
2026 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2027 atl1e_down(adapter);
2028 atl1e_free_irq(adapter);
2029 atl1e_free_ring_resources(adapter);
2030
2031 return 0;
2032 }
2033
2034 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2035 {
2036 struct net_device *netdev = pci_get_drvdata(pdev);
2037 struct atl1e_adapter *adapter = netdev_priv(netdev);
2038 struct atl1e_hw *hw = &adapter->hw;
2039 u32 ctrl = 0;
2040 u32 mac_ctrl_data = 0;
2041 u32 wol_ctrl_data = 0;
2042 u16 mii_advertise_data = 0;
2043 u16 mii_bmsr_data = 0;
2044 u16 mii_intr_status_data = 0;
2045 u32 wufc = adapter->wol;
2046 u32 i;
2047 #ifdef CONFIG_PM
2048 int retval = 0;
2049 #endif
2050
2051 if (netif_running(netdev)) {
2052 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2053 atl1e_down(adapter);
2054 }
2055 netif_device_detach(netdev);
2056
2057 #ifdef CONFIG_PM
2058 retval = pci_save_state(pdev);
2059 if (retval)
2060 return retval;
2061 #endif
2062
2063 if (wufc) {
2064 /* get link status */
2065 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2066 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2067
2068 mii_advertise_data = ADVERTISE_10HALF;
2069
2070 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2071 (atl1e_write_phy_reg(hw,
2072 MII_ADVERTISE, mii_advertise_data) != 0) ||
2073 (atl1e_phy_commit(hw)) != 0) {
2074 netdev_dbg(adapter->netdev, "set phy register failed\n");
2075 goto wol_dis;
2076 }
2077
2078 hw->phy_configured = false; /* re-init PHY when resume */
2079
2080 /* turn on magic packet wol */
2081 if (wufc & AT_WUFC_MAG)
2082 wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2083
2084 if (wufc & AT_WUFC_LNKC) {
2085 /* if orignal link status is link, just wait for retrive link */
2086 if (mii_bmsr_data & BMSR_LSTATUS) {
2087 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2088 msleep(100);
2089 atl1e_read_phy_reg(hw, MII_BMSR,
2090 (u16 *)&mii_bmsr_data);
2091 if (mii_bmsr_data & BMSR_LSTATUS)
2092 break;
2093 }
2094
2095 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2096 netdev_dbg(adapter->netdev,
2097 "Link may change when suspend\n");
2098 }
2099 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2100 /* only link up can wake up */
2101 if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2102 netdev_dbg(adapter->netdev,
2103 "read write phy register failed\n");
2104 goto wol_dis;
2105 }
2106 }
2107 /* clear phy interrupt */
2108 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2109 /* Config MAC Ctrl register */
2110 mac_ctrl_data = MAC_CTRL_RX_EN;
2111 /* set to 10/100M halt duplex */
2112 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2113 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2114 MAC_CTRL_PRMLEN_MASK) <<
2115 MAC_CTRL_PRMLEN_SHIFT);
2116
2117 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2118
2119 /* magic packet maybe Broadcast&multicast&Unicast frame */
2120 if (wufc & AT_WUFC_MAG)
2121 mac_ctrl_data |= MAC_CTRL_BC_EN;
2122
2123 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2124 mac_ctrl_data);
2125
2126 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2127 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2128 /* pcie patch */
2129 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2130 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2131 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2132 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2133 goto suspend_exit;
2134 }
2135 wol_dis:
2136
2137 /* WOL disabled */
2138 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2139
2140 /* pcie patch */
2141 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2142 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2143 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2144
2145 atl1e_force_ps(hw);
2146 hw->phy_configured = false; /* re-init PHY when resume */
2147
2148 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2149
2150 suspend_exit:
2151
2152 if (netif_running(netdev))
2153 atl1e_free_irq(adapter);
2154
2155 pci_disable_device(pdev);
2156
2157 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2158
2159 return 0;
2160 }
2161
2162 #ifdef CONFIG_PM
2163 static int atl1e_resume(struct pci_dev *pdev)
2164 {
2165 struct net_device *netdev = pci_get_drvdata(pdev);
2166 struct atl1e_adapter *adapter = netdev_priv(netdev);
2167 u32 err;
2168
2169 pci_set_power_state(pdev, PCI_D0);
2170 pci_restore_state(pdev);
2171
2172 err = pci_enable_device(pdev);
2173 if (err) {
2174 netdev_err(adapter->netdev,
2175 "Cannot enable PCI device from suspend\n");
2176 return err;
2177 }
2178
2179 pci_set_master(pdev);
2180
2181 AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2182
2183 pci_enable_wake(pdev, PCI_D3hot, 0);
2184 pci_enable_wake(pdev, PCI_D3cold, 0);
2185
2186 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2187
2188 if (netif_running(netdev)) {
2189 err = atl1e_request_irq(adapter);
2190 if (err)
2191 return err;
2192 }
2193
2194 atl1e_reset_hw(&adapter->hw);
2195
2196 if (netif_running(netdev))
2197 atl1e_up(adapter);
2198
2199 netif_device_attach(netdev);
2200
2201 return 0;
2202 }
2203 #endif
2204
2205 static void atl1e_shutdown(struct pci_dev *pdev)
2206 {
2207 atl1e_suspend(pdev, PMSG_SUSPEND);
2208 }
2209
2210 static const struct net_device_ops atl1e_netdev_ops = {
2211 .ndo_open = atl1e_open,
2212 .ndo_stop = atl1e_close,
2213 .ndo_start_xmit = atl1e_xmit_frame,
2214 .ndo_get_stats = atl1e_get_stats,
2215 .ndo_set_multicast_list = atl1e_set_multi,
2216 .ndo_validate_addr = eth_validate_addr,
2217 .ndo_set_mac_address = atl1e_set_mac_addr,
2218 .ndo_fix_features = atl1e_fix_features,
2219 .ndo_set_features = atl1e_set_features,
2220 .ndo_change_mtu = atl1e_change_mtu,
2221 .ndo_do_ioctl = atl1e_ioctl,
2222 .ndo_tx_timeout = atl1e_tx_timeout,
2223 #ifdef CONFIG_NET_POLL_CONTROLLER
2224 .ndo_poll_controller = atl1e_netpoll,
2225 #endif
2226
2227 };
2228
2229 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2230 {
2231 SET_NETDEV_DEV(netdev, &pdev->dev);
2232 pci_set_drvdata(pdev, netdev);
2233
2234 netdev->irq = pdev->irq;
2235 netdev->netdev_ops = &atl1e_netdev_ops;
2236
2237 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2238 atl1e_set_ethtool_ops(netdev);
2239
2240 netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2241 NETIF_F_HW_VLAN_RX;
2242 netdev->features = netdev->hw_features | NETIF_F_LLTX |
2243 NETIF_F_HW_VLAN_TX;
2244
2245 return 0;
2246 }
2247
2248 /*
2249 * atl1e_probe - Device Initialization Routine
2250 * @pdev: PCI device information struct
2251 * @ent: entry in atl1e_pci_tbl
2252 *
2253 * Returns 0 on success, negative on failure
2254 *
2255 * atl1e_probe initializes an adapter identified by a pci_dev structure.
2256 * The OS initialization, configuring of the adapter private structure,
2257 * and a hardware reset occur.
2258 */
2259 static int __devinit atl1e_probe(struct pci_dev *pdev,
2260 const struct pci_device_id *ent)
2261 {
2262 struct net_device *netdev;
2263 struct atl1e_adapter *adapter = NULL;
2264 static int cards_found;
2265
2266 int err = 0;
2267
2268 err = pci_enable_device(pdev);
2269 if (err) {
2270 dev_err(&pdev->dev, "cannot enable PCI device\n");
2271 return err;
2272 }
2273
2274 /*
2275 * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2276 * shared register for the high 32 bits, so only a single, aligned,
2277 * 4 GB physical address range can be used at a time.
2278 *
2279 * Supporting 64-bit DMA on this hardware is more trouble than it's
2280 * worth. It is far easier to limit to 32-bit DMA than update
2281 * various kernel subsystems to support the mechanics required by a
2282 * fixed-high-32-bit system.
2283 */
2284 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2285 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2286 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2287 goto err_dma;
2288 }
2289
2290 err = pci_request_regions(pdev, atl1e_driver_name);
2291 if (err) {
2292 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2293 goto err_pci_reg;
2294 }
2295
2296 pci_set_master(pdev);
2297
2298 netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2299 if (netdev == NULL) {
2300 err = -ENOMEM;
2301 dev_err(&pdev->dev, "etherdev alloc failed\n");
2302 goto err_alloc_etherdev;
2303 }
2304
2305 err = atl1e_init_netdev(netdev, pdev);
2306 if (err) {
2307 netdev_err(netdev, "init netdevice failed\n");
2308 goto err_init_netdev;
2309 }
2310 adapter = netdev_priv(netdev);
2311 adapter->bd_number = cards_found;
2312 adapter->netdev = netdev;
2313 adapter->pdev = pdev;
2314 adapter->hw.adapter = adapter;
2315 adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2316 if (!adapter->hw.hw_addr) {
2317 err = -EIO;
2318 netdev_err(netdev, "cannot map device registers\n");
2319 goto err_ioremap;
2320 }
2321 netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2322
2323 /* init mii data */
2324 adapter->mii.dev = netdev;
2325 adapter->mii.mdio_read = atl1e_mdio_read;
2326 adapter->mii.mdio_write = atl1e_mdio_write;
2327 adapter->mii.phy_id_mask = 0x1f;
2328 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2329
2330 netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2331
2332 init_timer(&adapter->phy_config_timer);
2333 adapter->phy_config_timer.function = atl1e_phy_config;
2334 adapter->phy_config_timer.data = (unsigned long) adapter;
2335
2336 /* get user settings */
2337 atl1e_check_options(adapter);
2338 /*
2339 * Mark all PCI regions associated with PCI device
2340 * pdev as being reserved by owner atl1e_driver_name
2341 * Enables bus-mastering on the device and calls
2342 * pcibios_set_master to do the needed arch specific settings
2343 */
2344 atl1e_setup_pcicmd(pdev);
2345 /* setup the private structure */
2346 err = atl1e_sw_init(adapter);
2347 if (err) {
2348 netdev_err(netdev, "net device private data init failed\n");
2349 goto err_sw_init;
2350 }
2351
2352 /* Init GPHY as early as possible due to power saving issue */
2353 atl1e_phy_init(&adapter->hw);
2354 /* reset the controller to
2355 * put the device in a known good starting state */
2356 err = atl1e_reset_hw(&adapter->hw);
2357 if (err) {
2358 err = -EIO;
2359 goto err_reset;
2360 }
2361
2362 if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2363 err = -EIO;
2364 netdev_err(netdev, "get mac address failed\n");
2365 goto err_eeprom;
2366 }
2367
2368 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2369 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2370 netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2371
2372 INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2373 INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2374 err = register_netdev(netdev);
2375 if (err) {
2376 netdev_err(netdev, "register netdevice failed\n");
2377 goto err_register;
2378 }
2379
2380 /* assume we have no link for now */
2381 netif_stop_queue(netdev);
2382 netif_carrier_off(netdev);
2383
2384 cards_found++;
2385
2386 return 0;
2387
2388 err_reset:
2389 err_register:
2390 err_sw_init:
2391 err_eeprom:
2392 iounmap(adapter->hw.hw_addr);
2393 err_init_netdev:
2394 err_ioremap:
2395 free_netdev(netdev);
2396 err_alloc_etherdev:
2397 pci_release_regions(pdev);
2398 err_pci_reg:
2399 err_dma:
2400 pci_disable_device(pdev);
2401 return err;
2402 }
2403
2404 /*
2405 * atl1e_remove - Device Removal Routine
2406 * @pdev: PCI device information struct
2407 *
2408 * atl1e_remove is called by the PCI subsystem to alert the driver
2409 * that it should release a PCI device. The could be caused by a
2410 * Hot-Plug event, or because the driver is going to be removed from
2411 * memory.
2412 */
2413 static void __devexit atl1e_remove(struct pci_dev *pdev)
2414 {
2415 struct net_device *netdev = pci_get_drvdata(pdev);
2416 struct atl1e_adapter *adapter = netdev_priv(netdev);
2417
2418 /*
2419 * flush_scheduled work may reschedule our watchdog task, so
2420 * explicitly disable watchdog tasks from being rescheduled
2421 */
2422 set_bit(__AT_DOWN, &adapter->flags);
2423
2424 atl1e_del_timer(adapter);
2425 atl1e_cancel_work(adapter);
2426
2427 unregister_netdev(netdev);
2428 atl1e_free_ring_resources(adapter);
2429 atl1e_force_ps(&adapter->hw);
2430 iounmap(adapter->hw.hw_addr);
2431 pci_release_regions(pdev);
2432 free_netdev(netdev);
2433 pci_disable_device(pdev);
2434 }
2435
2436 /*
2437 * atl1e_io_error_detected - called when PCI error is detected
2438 * @pdev: Pointer to PCI device
2439 * @state: The current pci connection state
2440 *
2441 * This function is called after a PCI bus error affecting
2442 * this device has been detected.
2443 */
2444 static pci_ers_result_t
2445 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2446 {
2447 struct net_device *netdev = pci_get_drvdata(pdev);
2448 struct atl1e_adapter *adapter = netdev_priv(netdev);
2449
2450 netif_device_detach(netdev);
2451
2452 if (state == pci_channel_io_perm_failure)
2453 return PCI_ERS_RESULT_DISCONNECT;
2454
2455 if (netif_running(netdev))
2456 atl1e_down(adapter);
2457
2458 pci_disable_device(pdev);
2459
2460 /* Request a slot slot reset. */
2461 return PCI_ERS_RESULT_NEED_RESET;
2462 }
2463
2464 /*
2465 * atl1e_io_slot_reset - called after the pci bus has been reset.
2466 * @pdev: Pointer to PCI device
2467 *
2468 * Restart the card from scratch, as if from a cold-boot. Implementation
2469 * resembles the first-half of the e1000_resume routine.
2470 */
2471 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2472 {
2473 struct net_device *netdev = pci_get_drvdata(pdev);
2474 struct atl1e_adapter *adapter = netdev_priv(netdev);
2475
2476 if (pci_enable_device(pdev)) {
2477 netdev_err(adapter->netdev,
2478 "Cannot re-enable PCI device after reset\n");
2479 return PCI_ERS_RESULT_DISCONNECT;
2480 }
2481 pci_set_master(pdev);
2482
2483 pci_enable_wake(pdev, PCI_D3hot, 0);
2484 pci_enable_wake(pdev, PCI_D3cold, 0);
2485
2486 atl1e_reset_hw(&adapter->hw);
2487
2488 return PCI_ERS_RESULT_RECOVERED;
2489 }
2490
2491 /*
2492 * atl1e_io_resume - called when traffic can start flowing again.
2493 * @pdev: Pointer to PCI device
2494 *
2495 * This callback is called when the error recovery driver tells us that
2496 * its OK to resume normal operation. Implementation resembles the
2497 * second-half of the atl1e_resume routine.
2498 */
2499 static void atl1e_io_resume(struct pci_dev *pdev)
2500 {
2501 struct net_device *netdev = pci_get_drvdata(pdev);
2502 struct atl1e_adapter *adapter = netdev_priv(netdev);
2503
2504 if (netif_running(netdev)) {
2505 if (atl1e_up(adapter)) {
2506 netdev_err(adapter->netdev,
2507 "can't bring device back up after reset\n");
2508 return;
2509 }
2510 }
2511
2512 netif_device_attach(netdev);
2513 }
2514
2515 static struct pci_error_handlers atl1e_err_handler = {
2516 .error_detected = atl1e_io_error_detected,
2517 .slot_reset = atl1e_io_slot_reset,
2518 .resume = atl1e_io_resume,
2519 };
2520
2521 static struct pci_driver atl1e_driver = {
2522 .name = atl1e_driver_name,
2523 .id_table = atl1e_pci_tbl,
2524 .probe = atl1e_probe,
2525 .remove = __devexit_p(atl1e_remove),
2526 /* Power Management Hooks */
2527 #ifdef CONFIG_PM
2528 .suspend = atl1e_suspend,
2529 .resume = atl1e_resume,
2530 #endif
2531 .shutdown = atl1e_shutdown,
2532 .err_handler = &atl1e_err_handler
2533 };
2534
2535 /*
2536 * atl1e_init_module - Driver Registration Routine
2537 *
2538 * atl1e_init_module is the first routine called when the driver is
2539 * loaded. All it does is register with the PCI subsystem.
2540 */
2541 static int __init atl1e_init_module(void)
2542 {
2543 return pci_register_driver(&atl1e_driver);
2544 }
2545
2546 /*
2547 * atl1e_exit_module - Driver Exit Cleanup Routine
2548 *
2549 * atl1e_exit_module is called just before the driver is removed
2550 * from memory.
2551 */
2552 static void __exit atl1e_exit_module(void)
2553 {
2554 pci_unregister_driver(&atl1e_driver);
2555 }
2556
2557 module_init(atl1e_init_module);
2558 module_exit(atl1e_exit_module);