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Merge tag 'pci-v3.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
[deliverable/linux.git] / drivers / net / ethernet / atheros / atl1e / atl1e_main.c
1 /*
2 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
3 *
4 * Derived from Intel e1000 driver
5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59
19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22 #include "atl1e.h"
23
24 #define DRV_VERSION "1.0.0.7-NAPI"
25
26 char atl1e_driver_name[] = "ATL1E";
27 char atl1e_driver_version[] = DRV_VERSION;
28 #define PCI_DEVICE_ID_ATTANSIC_L1E 0x1026
29 /*
30 * atl1e_pci_tbl - PCI Device ID Table
31 *
32 * Wildcard entries (PCI_ANY_ID) should come last
33 * Last entry must be all 0s
34 *
35 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
36 * Class, Class Mask, private data (not used) }
37 */
38 static 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_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
317 {
318
319 if (features & NETIF_F_RXALL) {
320 /* enable RX of ALL frames */
321 *mac_ctrl_data |= MAC_CTRL_DBG;
322 } else {
323 /* disable RX of ALL frames */
324 *mac_ctrl_data &= ~MAC_CTRL_DBG;
325 }
326 }
327
328 static void atl1e_rx_mode(struct net_device *netdev,
329 netdev_features_t features)
330 {
331 struct atl1e_adapter *adapter = netdev_priv(netdev);
332 u32 mac_ctrl_data = 0;
333
334 netdev_dbg(adapter->netdev, "%s\n", __func__);
335
336 atl1e_irq_disable(adapter);
337 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
338 __atl1e_rx_mode(features, &mac_ctrl_data);
339 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
340 atl1e_irq_enable(adapter);
341 }
342
343
344 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
345 {
346 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
347 /* enable VLAN tag insert/strip */
348 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
349 } else {
350 /* disable VLAN tag insert/strip */
351 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
352 }
353 }
354
355 static void atl1e_vlan_mode(struct net_device *netdev,
356 netdev_features_t features)
357 {
358 struct atl1e_adapter *adapter = netdev_priv(netdev);
359 u32 mac_ctrl_data = 0;
360
361 netdev_dbg(adapter->netdev, "%s\n", __func__);
362
363 atl1e_irq_disable(adapter);
364 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
365 __atl1e_vlan_mode(features, &mac_ctrl_data);
366 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
367 atl1e_irq_enable(adapter);
368 }
369
370 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
371 {
372 netdev_dbg(adapter->netdev, "%s\n", __func__);
373 atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
374 }
375
376 /**
377 * atl1e_set_mac - Change the Ethernet Address of the NIC
378 * @netdev: network interface device structure
379 * @p: pointer to an address structure
380 *
381 * Returns 0 on success, negative on failure
382 */
383 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
384 {
385 struct atl1e_adapter *adapter = netdev_priv(netdev);
386 struct sockaddr *addr = p;
387
388 if (!is_valid_ether_addr(addr->sa_data))
389 return -EADDRNOTAVAIL;
390
391 if (netif_running(netdev))
392 return -EBUSY;
393
394 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
395 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
396
397 atl1e_hw_set_mac_addr(&adapter->hw);
398
399 return 0;
400 }
401
402 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
403 netdev_features_t features)
404 {
405 /*
406 * Since there is no support for separate rx/tx vlan accel
407 * enable/disable make sure tx flag is always in same state as rx.
408 */
409 if (features & NETIF_F_HW_VLAN_CTAG_RX)
410 features |= NETIF_F_HW_VLAN_CTAG_TX;
411 else
412 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
413
414 return features;
415 }
416
417 static int atl1e_set_features(struct net_device *netdev,
418 netdev_features_t features)
419 {
420 netdev_features_t changed = netdev->features ^ features;
421
422 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
423 atl1e_vlan_mode(netdev, features);
424
425 if (changed & NETIF_F_RXALL)
426 atl1e_rx_mode(netdev, features);
427
428
429 return 0;
430 }
431
432 /**
433 * atl1e_change_mtu - Change the Maximum Transfer Unit
434 * @netdev: network interface device structure
435 * @new_mtu: new value for maximum frame size
436 *
437 * Returns 0 on success, negative on failure
438 */
439 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
440 {
441 struct atl1e_adapter *adapter = netdev_priv(netdev);
442 int old_mtu = netdev->mtu;
443 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
444
445 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
446 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
447 netdev_warn(adapter->netdev, "invalid MTU setting\n");
448 return -EINVAL;
449 }
450 /* set MTU */
451 if (old_mtu != new_mtu && netif_running(netdev)) {
452 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
453 msleep(1);
454 netdev->mtu = new_mtu;
455 adapter->hw.max_frame_size = new_mtu;
456 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
457 atl1e_down(adapter);
458 atl1e_up(adapter);
459 clear_bit(__AT_RESETTING, &adapter->flags);
460 }
461 return 0;
462 }
463
464 /*
465 * caller should hold mdio_lock
466 */
467 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
468 {
469 struct atl1e_adapter *adapter = netdev_priv(netdev);
470 u16 result;
471
472 atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
473 return result;
474 }
475
476 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
477 int reg_num, int val)
478 {
479 struct atl1e_adapter *adapter = netdev_priv(netdev);
480
481 atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
482 }
483
484 static int atl1e_mii_ioctl(struct net_device *netdev,
485 struct ifreq *ifr, int cmd)
486 {
487 struct atl1e_adapter *adapter = netdev_priv(netdev);
488 struct mii_ioctl_data *data = if_mii(ifr);
489 unsigned long flags;
490 int retval = 0;
491
492 if (!netif_running(netdev))
493 return -EINVAL;
494
495 spin_lock_irqsave(&adapter->mdio_lock, flags);
496 switch (cmd) {
497 case SIOCGMIIPHY:
498 data->phy_id = 0;
499 break;
500
501 case SIOCGMIIREG:
502 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
503 &data->val_out)) {
504 retval = -EIO;
505 goto out;
506 }
507 break;
508
509 case SIOCSMIIREG:
510 if (data->reg_num & ~(0x1F)) {
511 retval = -EFAULT;
512 goto out;
513 }
514
515 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
516 data->reg_num, data->val_in);
517 if (atl1e_write_phy_reg(&adapter->hw,
518 data->reg_num, data->val_in)) {
519 retval = -EIO;
520 goto out;
521 }
522 break;
523
524 default:
525 retval = -EOPNOTSUPP;
526 break;
527 }
528 out:
529 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
530 return retval;
531
532 }
533
534 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
535 {
536 switch (cmd) {
537 case SIOCGMIIPHY:
538 case SIOCGMIIREG:
539 case SIOCSMIIREG:
540 return atl1e_mii_ioctl(netdev, ifr, cmd);
541 default:
542 return -EOPNOTSUPP;
543 }
544 }
545
546 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
547 {
548 u16 cmd;
549
550 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
551 cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
552 cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
553 pci_write_config_word(pdev, PCI_COMMAND, cmd);
554
555 /*
556 * some motherboards BIOS(PXE/EFI) driver may set PME
557 * while they transfer control to OS (Windows/Linux)
558 * so we should clear this bit before NIC work normally
559 */
560 pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
561 msleep(1);
562 }
563
564 /**
565 * atl1e_alloc_queues - Allocate memory for all rings
566 * @adapter: board private structure to initialize
567 *
568 */
569 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
570 {
571 return 0;
572 }
573
574 /**
575 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
576 * @adapter: board private structure to initialize
577 *
578 * atl1e_sw_init initializes the Adapter private data structure.
579 * Fields are initialized based on PCI device information and
580 * OS network device settings (MTU size).
581 */
582 static int atl1e_sw_init(struct atl1e_adapter *adapter)
583 {
584 struct atl1e_hw *hw = &adapter->hw;
585 struct pci_dev *pdev = adapter->pdev;
586 u32 phy_status_data = 0;
587
588 adapter->wol = 0;
589 adapter->link_speed = SPEED_0; /* hardware init */
590 adapter->link_duplex = FULL_DUPLEX;
591 adapter->num_rx_queues = 1;
592
593 /* PCI config space info */
594 hw->vendor_id = pdev->vendor;
595 hw->device_id = pdev->device;
596 hw->subsystem_vendor_id = pdev->subsystem_vendor;
597 hw->subsystem_id = pdev->subsystem_device;
598 hw->revision_id = pdev->revision;
599
600 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
601
602 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
603 /* nic type */
604 if (hw->revision_id >= 0xF0) {
605 hw->nic_type = athr_l2e_revB;
606 } else {
607 if (phy_status_data & PHY_STATUS_100M)
608 hw->nic_type = athr_l1e;
609 else
610 hw->nic_type = athr_l2e_revA;
611 }
612
613 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
614
615 if (phy_status_data & PHY_STATUS_EMI_CA)
616 hw->emi_ca = true;
617 else
618 hw->emi_ca = false;
619
620 hw->phy_configured = false;
621 hw->preamble_len = 7;
622 hw->max_frame_size = adapter->netdev->mtu;
623 hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
624 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
625
626 hw->rrs_type = atl1e_rrs_disable;
627 hw->indirect_tab = 0;
628 hw->base_cpu = 0;
629
630 /* need confirm */
631
632 hw->ict = 50000; /* 100ms */
633 hw->smb_timer = 200000; /* 200ms */
634 hw->tpd_burst = 5;
635 hw->rrd_thresh = 1;
636 hw->tpd_thresh = adapter->tx_ring.count / 2;
637 hw->rx_count_down = 4; /* 2us resolution */
638 hw->tx_count_down = hw->imt * 4 / 3;
639 hw->dmar_block = atl1e_dma_req_1024;
640 hw->dmaw_block = atl1e_dma_req_1024;
641 hw->dmar_dly_cnt = 15;
642 hw->dmaw_dly_cnt = 4;
643
644 if (atl1e_alloc_queues(adapter)) {
645 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
646 return -ENOMEM;
647 }
648
649 atomic_set(&adapter->irq_sem, 1);
650 spin_lock_init(&adapter->mdio_lock);
651 spin_lock_init(&adapter->tx_lock);
652
653 set_bit(__AT_DOWN, &adapter->flags);
654
655 return 0;
656 }
657
658 /**
659 * atl1e_clean_tx_ring - Free Tx-skb
660 * @adapter: board private structure
661 */
662 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
663 {
664 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
665 struct atl1e_tx_buffer *tx_buffer = NULL;
666 struct pci_dev *pdev = adapter->pdev;
667 u16 index, ring_count;
668
669 if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
670 return;
671
672 ring_count = tx_ring->count;
673 /* first unmmap dma */
674 for (index = 0; index < ring_count; index++) {
675 tx_buffer = &tx_ring->tx_buffer[index];
676 if (tx_buffer->dma) {
677 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
678 pci_unmap_single(pdev, tx_buffer->dma,
679 tx_buffer->length, PCI_DMA_TODEVICE);
680 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
681 pci_unmap_page(pdev, tx_buffer->dma,
682 tx_buffer->length, PCI_DMA_TODEVICE);
683 tx_buffer->dma = 0;
684 }
685 }
686 /* second free skb */
687 for (index = 0; index < ring_count; index++) {
688 tx_buffer = &tx_ring->tx_buffer[index];
689 if (tx_buffer->skb) {
690 dev_kfree_skb_any(tx_buffer->skb);
691 tx_buffer->skb = NULL;
692 }
693 }
694 /* Zero out Tx-buffers */
695 memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
696 ring_count);
697 memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
698 ring_count);
699 }
700
701 /**
702 * atl1e_clean_rx_ring - Free rx-reservation skbs
703 * @adapter: board private structure
704 */
705 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
706 {
707 struct atl1e_rx_ring *rx_ring =
708 &adapter->rx_ring;
709 struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
710 u16 i, j;
711
712
713 if (adapter->ring_vir_addr == NULL)
714 return;
715 /* Zero out the descriptor ring */
716 for (i = 0; i < adapter->num_rx_queues; i++) {
717 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
718 if (rx_page_desc[i].rx_page[j].addr != NULL) {
719 memset(rx_page_desc[i].rx_page[j].addr, 0,
720 rx_ring->real_page_size);
721 }
722 }
723 }
724 }
725
726 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
727 {
728 *ring_size = ((u32)(adapter->tx_ring.count *
729 sizeof(struct atl1e_tpd_desc) + 7
730 /* tx ring, qword align */
731 + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
732 adapter->num_rx_queues + 31
733 /* rx ring, 32 bytes align */
734 + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
735 sizeof(u32) + 3));
736 /* tx, rx cmd, dword align */
737 }
738
739 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
740 {
741 struct atl1e_rx_ring *rx_ring = NULL;
742
743 rx_ring = &adapter->rx_ring;
744
745 rx_ring->real_page_size = adapter->rx_ring.page_size
746 + adapter->hw.max_frame_size
747 + ETH_HLEN + VLAN_HLEN
748 + ETH_FCS_LEN;
749 rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
750 atl1e_cal_ring_size(adapter, &adapter->ring_size);
751
752 adapter->ring_vir_addr = NULL;
753 adapter->rx_ring.desc = NULL;
754 rwlock_init(&adapter->tx_ring.tx_lock);
755 }
756
757 /*
758 * Read / Write Ptr Initialize:
759 */
760 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
761 {
762 struct atl1e_tx_ring *tx_ring = NULL;
763 struct atl1e_rx_ring *rx_ring = NULL;
764 struct atl1e_rx_page_desc *rx_page_desc = NULL;
765 int i, j;
766
767 tx_ring = &adapter->tx_ring;
768 rx_ring = &adapter->rx_ring;
769 rx_page_desc = rx_ring->rx_page_desc;
770
771 tx_ring->next_to_use = 0;
772 atomic_set(&tx_ring->next_to_clean, 0);
773
774 for (i = 0; i < adapter->num_rx_queues; i++) {
775 rx_page_desc[i].rx_using = 0;
776 rx_page_desc[i].rx_nxseq = 0;
777 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
778 *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
779 rx_page_desc[i].rx_page[j].read_offset = 0;
780 }
781 }
782 }
783
784 /**
785 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
786 * @adapter: board private structure
787 *
788 * Free all transmit software resources
789 */
790 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
791 {
792 struct pci_dev *pdev = adapter->pdev;
793
794 atl1e_clean_tx_ring(adapter);
795 atl1e_clean_rx_ring(adapter);
796
797 if (adapter->ring_vir_addr) {
798 pci_free_consistent(pdev, adapter->ring_size,
799 adapter->ring_vir_addr, adapter->ring_dma);
800 adapter->ring_vir_addr = NULL;
801 }
802
803 if (adapter->tx_ring.tx_buffer) {
804 kfree(adapter->tx_ring.tx_buffer);
805 adapter->tx_ring.tx_buffer = NULL;
806 }
807 }
808
809 /**
810 * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
811 * @adapter: board private structure
812 *
813 * Return 0 on success, negative on failure
814 */
815 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
816 {
817 struct pci_dev *pdev = adapter->pdev;
818 struct atl1e_tx_ring *tx_ring;
819 struct atl1e_rx_ring *rx_ring;
820 struct atl1e_rx_page_desc *rx_page_desc;
821 int size, i, j;
822 u32 offset = 0;
823 int err = 0;
824
825 if (adapter->ring_vir_addr != NULL)
826 return 0; /* alloced already */
827
828 tx_ring = &adapter->tx_ring;
829 rx_ring = &adapter->rx_ring;
830
831 /* real ring DMA buffer */
832
833 size = adapter->ring_size;
834 adapter->ring_vir_addr = pci_alloc_consistent(pdev,
835 adapter->ring_size, &adapter->ring_dma);
836
837 if (adapter->ring_vir_addr == NULL) {
838 netdev_err(adapter->netdev,
839 "pci_alloc_consistent failed, size = D%d\n", size);
840 return -ENOMEM;
841 }
842
843 memset(adapter->ring_vir_addr, 0, adapter->ring_size);
844
845 rx_page_desc = rx_ring->rx_page_desc;
846
847 /* Init TPD Ring */
848 tx_ring->dma = roundup(adapter->ring_dma, 8);
849 offset = tx_ring->dma - adapter->ring_dma;
850 tx_ring->desc = adapter->ring_vir_addr + offset;
851 size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
852 tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
853 if (tx_ring->tx_buffer == NULL) {
854 err = -ENOMEM;
855 goto failed;
856 }
857
858 /* Init RXF-Pages */
859 offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
860 offset = roundup(offset, 32);
861
862 for (i = 0; i < adapter->num_rx_queues; i++) {
863 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
864 rx_page_desc[i].rx_page[j].dma =
865 adapter->ring_dma + offset;
866 rx_page_desc[i].rx_page[j].addr =
867 adapter->ring_vir_addr + offset;
868 offset += rx_ring->real_page_size;
869 }
870 }
871
872 /* Init CMB dma address */
873 tx_ring->cmb_dma = adapter->ring_dma + offset;
874 tx_ring->cmb = adapter->ring_vir_addr + offset;
875 offset += sizeof(u32);
876
877 for (i = 0; i < adapter->num_rx_queues; i++) {
878 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
879 rx_page_desc[i].rx_page[j].write_offset_dma =
880 adapter->ring_dma + offset;
881 rx_page_desc[i].rx_page[j].write_offset_addr =
882 adapter->ring_vir_addr + offset;
883 offset += sizeof(u32);
884 }
885 }
886
887 if (unlikely(offset > adapter->ring_size)) {
888 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
889 offset, adapter->ring_size);
890 err = -1;
891 goto failed;
892 }
893
894 return 0;
895 failed:
896 if (adapter->ring_vir_addr != NULL) {
897 pci_free_consistent(pdev, adapter->ring_size,
898 adapter->ring_vir_addr, adapter->ring_dma);
899 adapter->ring_vir_addr = NULL;
900 }
901 return err;
902 }
903
904 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
905 {
906
907 struct atl1e_hw *hw = &adapter->hw;
908 struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
909 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
910 struct atl1e_rx_page_desc *rx_page_desc = NULL;
911 int i, j;
912
913 AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
914 (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
915 AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
916 (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
917 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
918 AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
919 (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
920
921 rx_page_desc = rx_ring->rx_page_desc;
922 /* RXF Page Physical address / Page Length */
923 for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
924 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
925 (u32)((adapter->ring_dma &
926 AT_DMA_HI_ADDR_MASK) >> 32));
927 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
928 u32 page_phy_addr;
929 u32 offset_phy_addr;
930
931 page_phy_addr = rx_page_desc[i].rx_page[j].dma;
932 offset_phy_addr =
933 rx_page_desc[i].rx_page[j].write_offset_dma;
934
935 AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
936 page_phy_addr & AT_DMA_LO_ADDR_MASK);
937 AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
938 offset_phy_addr & AT_DMA_LO_ADDR_MASK);
939 AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
940 }
941 }
942 /* Page Length */
943 AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
944 /* Load all of base address above */
945 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
946 }
947
948 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
949 {
950 struct atl1e_hw *hw = &adapter->hw;
951 u32 dev_ctrl_data = 0;
952 u32 max_pay_load = 0;
953 u32 jumbo_thresh = 0;
954 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
955
956 /* configure TXQ param */
957 if (hw->nic_type != athr_l2e_revB) {
958 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
959 if (hw->max_frame_size <= 1500) {
960 jumbo_thresh = hw->max_frame_size + extra_size;
961 } else if (hw->max_frame_size < 6*1024) {
962 jumbo_thresh =
963 (hw->max_frame_size + extra_size) * 2 / 3;
964 } else {
965 jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
966 }
967 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
968 }
969
970 dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
971
972 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
973 DEVICE_CTRL_MAX_PAYLOAD_MASK;
974
975 hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
976
977 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
978 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
979 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
980
981 if (hw->nic_type != athr_l2e_revB)
982 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
983 atl1e_pay_load_size[hw->dmar_block]);
984 /* enable TXQ */
985 AT_WRITE_REGW(hw, REG_TXQ_CTRL,
986 (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
987 << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
988 | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
989 }
990
991 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
992 {
993 struct atl1e_hw *hw = &adapter->hw;
994 u32 rxf_len = 0;
995 u32 rxf_low = 0;
996 u32 rxf_high = 0;
997 u32 rxf_thresh_data = 0;
998 u32 rxq_ctrl_data = 0;
999
1000 if (hw->nic_type != athr_l2e_revB) {
1001 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
1002 (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
1003 RXQ_JMBOSZ_TH_SHIFT |
1004 (1 & RXQ_JMBO_LKAH_MASK) <<
1005 RXQ_JMBO_LKAH_SHIFT));
1006
1007 rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
1008 rxf_high = rxf_len * 4 / 5;
1009 rxf_low = rxf_len / 5;
1010 rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK)
1011 << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1012 ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
1013 << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1014
1015 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
1016 }
1017
1018 /* RRS */
1019 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1020 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1021
1022 if (hw->rrs_type & atl1e_rrs_ipv4)
1023 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1024
1025 if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1026 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1027
1028 if (hw->rrs_type & atl1e_rrs_ipv6)
1029 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1030
1031 if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1032 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1033
1034 if (hw->rrs_type != atl1e_rrs_disable)
1035 rxq_ctrl_data |=
1036 (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1037
1038 rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1039 RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1040
1041 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1042 }
1043
1044 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1045 {
1046 struct atl1e_hw *hw = &adapter->hw;
1047 u32 dma_ctrl_data = 0;
1048
1049 dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1050 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1051 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1052 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1053 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1054 dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1055 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1056 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1057 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1058 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1059
1060 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1061 }
1062
1063 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1064 {
1065 u32 value;
1066 struct atl1e_hw *hw = &adapter->hw;
1067 struct net_device *netdev = adapter->netdev;
1068
1069 /* Config MAC CTRL Register */
1070 value = MAC_CTRL_TX_EN |
1071 MAC_CTRL_RX_EN ;
1072
1073 if (FULL_DUPLEX == adapter->link_duplex)
1074 value |= MAC_CTRL_DUPLX;
1075
1076 value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1077 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1078 MAC_CTRL_SPEED_SHIFT);
1079 value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1080
1081 value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1082 value |= (((u32)adapter->hw.preamble_len &
1083 MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1084
1085 __atl1e_vlan_mode(netdev->features, &value);
1086
1087 value |= MAC_CTRL_BC_EN;
1088 if (netdev->flags & IFF_PROMISC)
1089 value |= MAC_CTRL_PROMIS_EN;
1090 if (netdev->flags & IFF_ALLMULTI)
1091 value |= MAC_CTRL_MC_ALL_EN;
1092 if (netdev->features & NETIF_F_RXALL)
1093 value |= MAC_CTRL_DBG;
1094 AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1095 }
1096
1097 /**
1098 * atl1e_configure - Configure Transmit&Receive Unit after Reset
1099 * @adapter: board private structure
1100 *
1101 * Configure the Tx /Rx unit of the MAC after a reset.
1102 */
1103 static int atl1e_configure(struct atl1e_adapter *adapter)
1104 {
1105 struct atl1e_hw *hw = &adapter->hw;
1106
1107 u32 intr_status_data = 0;
1108
1109 /* clear interrupt status */
1110 AT_WRITE_REG(hw, REG_ISR, ~0);
1111
1112 /* 1. set MAC Address */
1113 atl1e_hw_set_mac_addr(hw);
1114
1115 /* 2. Init the Multicast HASH table done by set_muti */
1116
1117 /* 3. Clear any WOL status */
1118 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1119
1120 /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1121 * TPD Ring/SMB/RXF0 Page CMBs, they use the same
1122 * High 32bits memory */
1123 atl1e_configure_des_ring(adapter);
1124
1125 /* 5. set Interrupt Moderator Timer */
1126 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1127 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1128 AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1129 MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1130
1131 /* 6. rx/tx threshold to trig interrupt */
1132 AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1133 AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1134 AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1135 AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1136
1137 /* 7. set Interrupt Clear Timer */
1138 AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1139
1140 /* 8. set MTU */
1141 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1142 VLAN_HLEN + ETH_FCS_LEN);
1143
1144 /* 9. config TXQ early tx threshold */
1145 atl1e_configure_tx(adapter);
1146
1147 /* 10. config RXQ */
1148 atl1e_configure_rx(adapter);
1149
1150 /* 11. config DMA Engine */
1151 atl1e_configure_dma(adapter);
1152
1153 /* 12. smb timer to trig interrupt */
1154 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1155
1156 intr_status_data = AT_READ_REG(hw, REG_ISR);
1157 if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1158 netdev_err(adapter->netdev,
1159 "atl1e_configure failed, PCIE phy link down\n");
1160 return -1;
1161 }
1162
1163 AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1164 return 0;
1165 }
1166
1167 /**
1168 * atl1e_get_stats - Get System Network Statistics
1169 * @netdev: network interface device structure
1170 *
1171 * Returns the address of the device statistics structure.
1172 * The statistics are actually updated from the timer callback.
1173 */
1174 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1175 {
1176 struct atl1e_adapter *adapter = netdev_priv(netdev);
1177 struct atl1e_hw_stats *hw_stats = &adapter->hw_stats;
1178 struct net_device_stats *net_stats = &netdev->stats;
1179
1180 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1181 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1182 net_stats->multicast = hw_stats->rx_mcast;
1183 net_stats->collisions = hw_stats->tx_1_col +
1184 hw_stats->tx_2_col +
1185 hw_stats->tx_late_col +
1186 hw_stats->tx_abort_col;
1187
1188 net_stats->rx_errors = hw_stats->rx_frag +
1189 hw_stats->rx_fcs_err +
1190 hw_stats->rx_len_err +
1191 hw_stats->rx_sz_ov +
1192 hw_stats->rx_rrd_ov +
1193 hw_stats->rx_align_err +
1194 hw_stats->rx_rxf_ov;
1195
1196 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1197 net_stats->rx_length_errors = hw_stats->rx_len_err;
1198 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1199 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1200 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1201
1202 net_stats->tx_errors = hw_stats->tx_late_col +
1203 hw_stats->tx_abort_col +
1204 hw_stats->tx_underrun +
1205 hw_stats->tx_trunc;
1206
1207 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1208 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1209 net_stats->tx_window_errors = hw_stats->tx_late_col;
1210
1211 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1212 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1213
1214 return net_stats;
1215 }
1216
1217 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1218 {
1219 u16 hw_reg_addr = 0;
1220 unsigned long *stats_item = NULL;
1221
1222 /* update rx status */
1223 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1224 stats_item = &adapter->hw_stats.rx_ok;
1225 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1226 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1227 stats_item++;
1228 hw_reg_addr += 4;
1229 }
1230 /* update tx status */
1231 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1232 stats_item = &adapter->hw_stats.tx_ok;
1233 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1234 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1235 stats_item++;
1236 hw_reg_addr += 4;
1237 }
1238 }
1239
1240 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1241 {
1242 u16 phy_data;
1243
1244 spin_lock(&adapter->mdio_lock);
1245 atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1246 spin_unlock(&adapter->mdio_lock);
1247 }
1248
1249 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1250 {
1251 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1252 struct atl1e_tx_buffer *tx_buffer = NULL;
1253 u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1254 u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1255
1256 while (next_to_clean != hw_next_to_clean) {
1257 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1258 if (tx_buffer->dma) {
1259 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1260 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1261 tx_buffer->length, PCI_DMA_TODEVICE);
1262 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1263 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1264 tx_buffer->length, PCI_DMA_TODEVICE);
1265 tx_buffer->dma = 0;
1266 }
1267
1268 if (tx_buffer->skb) {
1269 dev_kfree_skb_irq(tx_buffer->skb);
1270 tx_buffer->skb = NULL;
1271 }
1272
1273 if (++next_to_clean == tx_ring->count)
1274 next_to_clean = 0;
1275 }
1276
1277 atomic_set(&tx_ring->next_to_clean, next_to_clean);
1278
1279 if (netif_queue_stopped(adapter->netdev) &&
1280 netif_carrier_ok(adapter->netdev)) {
1281 netif_wake_queue(adapter->netdev);
1282 }
1283
1284 return true;
1285 }
1286
1287 /**
1288 * atl1e_intr - Interrupt Handler
1289 * @irq: interrupt number
1290 * @data: pointer to a network interface device structure
1291 */
1292 static irqreturn_t atl1e_intr(int irq, void *data)
1293 {
1294 struct net_device *netdev = data;
1295 struct atl1e_adapter *adapter = netdev_priv(netdev);
1296 struct atl1e_hw *hw = &adapter->hw;
1297 int max_ints = AT_MAX_INT_WORK;
1298 int handled = IRQ_NONE;
1299 u32 status;
1300
1301 do {
1302 status = AT_READ_REG(hw, REG_ISR);
1303 if ((status & IMR_NORMAL_MASK) == 0 ||
1304 (status & ISR_DIS_INT) != 0) {
1305 if (max_ints != AT_MAX_INT_WORK)
1306 handled = IRQ_HANDLED;
1307 break;
1308 }
1309 /* link event */
1310 if (status & ISR_GPHY)
1311 atl1e_clear_phy_int(adapter);
1312 /* Ack ISR */
1313 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1314
1315 handled = IRQ_HANDLED;
1316 /* check if PCIE PHY Link down */
1317 if (status & ISR_PHY_LINKDOWN) {
1318 netdev_err(adapter->netdev,
1319 "pcie phy linkdown %x\n", status);
1320 if (netif_running(adapter->netdev)) {
1321 /* reset MAC */
1322 atl1e_irq_reset(adapter);
1323 schedule_work(&adapter->reset_task);
1324 break;
1325 }
1326 }
1327
1328 /* check if DMA read/write error */
1329 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1330 netdev_err(adapter->netdev,
1331 "PCIE DMA RW error (status = 0x%x)\n",
1332 status);
1333 atl1e_irq_reset(adapter);
1334 schedule_work(&adapter->reset_task);
1335 break;
1336 }
1337
1338 if (status & ISR_SMB)
1339 atl1e_update_hw_stats(adapter);
1340
1341 /* link event */
1342 if (status & (ISR_GPHY | ISR_MANUAL)) {
1343 netdev->stats.tx_carrier_errors++;
1344 atl1e_link_chg_event(adapter);
1345 break;
1346 }
1347
1348 /* transmit event */
1349 if (status & ISR_TX_EVENT)
1350 atl1e_clean_tx_irq(adapter);
1351
1352 if (status & ISR_RX_EVENT) {
1353 /*
1354 * disable rx interrupts, without
1355 * the synchronize_irq bit
1356 */
1357 AT_WRITE_REG(hw, REG_IMR,
1358 IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1359 AT_WRITE_FLUSH(hw);
1360 if (likely(napi_schedule_prep(
1361 &adapter->napi)))
1362 __napi_schedule(&adapter->napi);
1363 }
1364 } while (--max_ints > 0);
1365 /* re-enable Interrupt*/
1366 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1367
1368 return handled;
1369 }
1370
1371 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1372 struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1373 {
1374 u8 *packet = (u8 *)(prrs + 1);
1375 struct iphdr *iph;
1376 u16 head_len = ETH_HLEN;
1377 u16 pkt_flags;
1378 u16 err_flags;
1379
1380 skb_checksum_none_assert(skb);
1381 pkt_flags = prrs->pkt_flag;
1382 err_flags = prrs->err_flag;
1383 if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1384 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1385 if (pkt_flags & RRS_IS_IPV4) {
1386 if (pkt_flags & RRS_IS_802_3)
1387 head_len += 8;
1388 iph = (struct iphdr *) (packet + head_len);
1389 if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1390 goto hw_xsum;
1391 }
1392 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1393 skb->ip_summed = CHECKSUM_UNNECESSARY;
1394 return;
1395 }
1396 }
1397
1398 hw_xsum :
1399 return;
1400 }
1401
1402 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1403 u8 que)
1404 {
1405 struct atl1e_rx_page_desc *rx_page_desc =
1406 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1407 u8 rx_using = rx_page_desc[que].rx_using;
1408
1409 return &(rx_page_desc[que].rx_page[rx_using]);
1410 }
1411
1412 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1413 int *work_done, int work_to_do)
1414 {
1415 struct net_device *netdev = adapter->netdev;
1416 struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1417 struct atl1e_rx_page_desc *rx_page_desc =
1418 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1419 struct sk_buff *skb = NULL;
1420 struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1421 u32 packet_size, write_offset;
1422 struct atl1e_recv_ret_status *prrs;
1423
1424 write_offset = *(rx_page->write_offset_addr);
1425 if (likely(rx_page->read_offset < write_offset)) {
1426 do {
1427 if (*work_done >= work_to_do)
1428 break;
1429 (*work_done)++;
1430 /* get new packet's rrs */
1431 prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1432 rx_page->read_offset);
1433 /* check sequence number */
1434 if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1435 netdev_err(netdev,
1436 "rx sequence number error (rx=%d) (expect=%d)\n",
1437 prrs->seq_num,
1438 rx_page_desc[que].rx_nxseq);
1439 rx_page_desc[que].rx_nxseq++;
1440 /* just for debug use */
1441 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1442 (((u32)prrs->seq_num) << 16) |
1443 rx_page_desc[que].rx_nxseq);
1444 goto fatal_err;
1445 }
1446 rx_page_desc[que].rx_nxseq++;
1447
1448 /* error packet */
1449 if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1450 !(netdev->features & NETIF_F_RXALL)) {
1451 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1452 RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1453 RRS_ERR_TRUNC)) {
1454 /* hardware error, discard this packet*/
1455 netdev_err(netdev,
1456 "rx packet desc error %x\n",
1457 *((u32 *)prrs + 1));
1458 goto skip_pkt;
1459 }
1460 }
1461
1462 packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1463 RRS_PKT_SIZE_MASK);
1464 if (likely(!(netdev->features & NETIF_F_RXFCS)))
1465 packet_size -= 4; /* CRC */
1466
1467 skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1468 if (skb == NULL)
1469 goto skip_pkt;
1470
1471 memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1472 skb_put(skb, packet_size);
1473 skb->protocol = eth_type_trans(skb, netdev);
1474 atl1e_rx_checksum(adapter, skb, prrs);
1475
1476 if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1477 u16 vlan_tag = (prrs->vtag >> 4) |
1478 ((prrs->vtag & 7) << 13) |
1479 ((prrs->vtag & 8) << 9);
1480 netdev_dbg(netdev,
1481 "RXD VLAN TAG<RRD>=0x%04x\n",
1482 prrs->vtag);
1483 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1484 }
1485 netif_receive_skb(skb);
1486
1487 skip_pkt:
1488 /* skip current packet whether it's ok or not. */
1489 rx_page->read_offset +=
1490 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1491 RRS_PKT_SIZE_MASK) +
1492 sizeof(struct atl1e_recv_ret_status) + 31) &
1493 0xFFFFFFE0);
1494
1495 if (rx_page->read_offset >= rx_ring->page_size) {
1496 /* mark this page clean */
1497 u16 reg_addr;
1498 u8 rx_using;
1499
1500 rx_page->read_offset =
1501 *(rx_page->write_offset_addr) = 0;
1502 rx_using = rx_page_desc[que].rx_using;
1503 reg_addr =
1504 atl1e_rx_page_vld_regs[que][rx_using];
1505 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1506 rx_page_desc[que].rx_using ^= 1;
1507 rx_page = atl1e_get_rx_page(adapter, que);
1508 }
1509 write_offset = *(rx_page->write_offset_addr);
1510 } while (rx_page->read_offset < write_offset);
1511 }
1512
1513 return;
1514
1515 fatal_err:
1516 if (!test_bit(__AT_DOWN, &adapter->flags))
1517 schedule_work(&adapter->reset_task);
1518 }
1519
1520 /**
1521 * atl1e_clean - NAPI Rx polling callback
1522 */
1523 static int atl1e_clean(struct napi_struct *napi, int budget)
1524 {
1525 struct atl1e_adapter *adapter =
1526 container_of(napi, struct atl1e_adapter, napi);
1527 u32 imr_data;
1528 int work_done = 0;
1529
1530 /* Keep link state information with original netdev */
1531 if (!netif_carrier_ok(adapter->netdev))
1532 goto quit_polling;
1533
1534 atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1535
1536 /* If no Tx and not enough Rx work done, exit the polling mode */
1537 if (work_done < budget) {
1538 quit_polling:
1539 napi_complete(napi);
1540 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1541 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1542 /* test debug */
1543 if (test_bit(__AT_DOWN, &adapter->flags)) {
1544 atomic_dec(&adapter->irq_sem);
1545 netdev_err(adapter->netdev,
1546 "atl1e_clean is called when AT_DOWN\n");
1547 }
1548 /* reenable RX intr */
1549 /*atl1e_irq_enable(adapter); */
1550
1551 }
1552 return work_done;
1553 }
1554
1555 #ifdef CONFIG_NET_POLL_CONTROLLER
1556
1557 /*
1558 * Polling 'interrupt' - used by things like netconsole to send skbs
1559 * without having to re-enable interrupts. It's not called while
1560 * the interrupt routine is executing.
1561 */
1562 static void atl1e_netpoll(struct net_device *netdev)
1563 {
1564 struct atl1e_adapter *adapter = netdev_priv(netdev);
1565
1566 disable_irq(adapter->pdev->irq);
1567 atl1e_intr(adapter->pdev->irq, netdev);
1568 enable_irq(adapter->pdev->irq);
1569 }
1570 #endif
1571
1572 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1573 {
1574 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1575 u16 next_to_use = 0;
1576 u16 next_to_clean = 0;
1577
1578 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1579 next_to_use = tx_ring->next_to_use;
1580
1581 return (u16)(next_to_clean > next_to_use) ?
1582 (next_to_clean - next_to_use - 1) :
1583 (tx_ring->count + next_to_clean - next_to_use - 1);
1584 }
1585
1586 /*
1587 * get next usable tpd
1588 * Note: should call atl1e_tdp_avail to make sure
1589 * there is enough tpd to use
1590 */
1591 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1592 {
1593 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1594 u16 next_to_use = 0;
1595
1596 next_to_use = tx_ring->next_to_use;
1597 if (++tx_ring->next_to_use == tx_ring->count)
1598 tx_ring->next_to_use = 0;
1599
1600 memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1601 return &tx_ring->desc[next_to_use];
1602 }
1603
1604 static struct atl1e_tx_buffer *
1605 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1606 {
1607 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1608
1609 return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1610 }
1611
1612 /* Calculate the transmit packet descript needed*/
1613 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1614 {
1615 int i = 0;
1616 u16 tpd_req = 1;
1617 u16 fg_size = 0;
1618 u16 proto_hdr_len = 0;
1619
1620 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1621 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1622 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1623 }
1624
1625 if (skb_is_gso(skb)) {
1626 if (skb->protocol == htons(ETH_P_IP) ||
1627 (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1628 proto_hdr_len = skb_transport_offset(skb) +
1629 tcp_hdrlen(skb);
1630 if (proto_hdr_len < skb_headlen(skb)) {
1631 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1632 MAX_TX_BUF_LEN - 1) >>
1633 MAX_TX_BUF_SHIFT);
1634 }
1635 }
1636
1637 }
1638 return tpd_req;
1639 }
1640
1641 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1642 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1643 {
1644 u8 hdr_len;
1645 u32 real_len;
1646 unsigned short offload_type;
1647 int err;
1648
1649 if (skb_is_gso(skb)) {
1650 if (skb_header_cloned(skb)) {
1651 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1652 if (unlikely(err))
1653 return -1;
1654 }
1655 offload_type = skb_shinfo(skb)->gso_type;
1656
1657 if (offload_type & SKB_GSO_TCPV4) {
1658 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1659 + ntohs(ip_hdr(skb)->tot_len));
1660
1661 if (real_len < skb->len)
1662 pskb_trim(skb, real_len);
1663
1664 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1665 if (unlikely(skb->len == hdr_len)) {
1666 /* only xsum need */
1667 netdev_warn(adapter->netdev,
1668 "IPV4 tso with zero data??\n");
1669 goto check_sum;
1670 } else {
1671 ip_hdr(skb)->check = 0;
1672 ip_hdr(skb)->tot_len = 0;
1673 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1674 ip_hdr(skb)->saddr,
1675 ip_hdr(skb)->daddr,
1676 0, IPPROTO_TCP, 0);
1677 tpd->word3 |= (ip_hdr(skb)->ihl &
1678 TDP_V4_IPHL_MASK) <<
1679 TPD_V4_IPHL_SHIFT;
1680 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1681 TPD_TCPHDRLEN_MASK) <<
1682 TPD_TCPHDRLEN_SHIFT;
1683 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1684 TPD_MSS_MASK) << TPD_MSS_SHIFT;
1685 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1686 }
1687 return 0;
1688 }
1689 }
1690
1691 check_sum:
1692 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1693 u8 css, cso;
1694
1695 cso = skb_checksum_start_offset(skb);
1696 if (unlikely(cso & 0x1)) {
1697 netdev_err(adapter->netdev,
1698 "payload offset should not ant event number\n");
1699 return -1;
1700 } else {
1701 css = cso + skb->csum_offset;
1702 tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1703 TPD_PLOADOFFSET_SHIFT;
1704 tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1705 TPD_CCSUMOFFSET_SHIFT;
1706 tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1707 }
1708 }
1709
1710 return 0;
1711 }
1712
1713 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1714 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1715 {
1716 struct atl1e_tpd_desc *use_tpd = NULL;
1717 struct atl1e_tx_buffer *tx_buffer = NULL;
1718 u16 buf_len = skb_headlen(skb);
1719 u16 map_len = 0;
1720 u16 mapped_len = 0;
1721 u16 hdr_len = 0;
1722 u16 nr_frags;
1723 u16 f;
1724 int segment;
1725 int ring_start = adapter->tx_ring.next_to_use;
1726 int ring_end;
1727
1728 nr_frags = skb_shinfo(skb)->nr_frags;
1729 segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1730 if (segment) {
1731 /* TSO */
1732 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1733 use_tpd = tpd;
1734
1735 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1736 tx_buffer->length = map_len;
1737 tx_buffer->dma = pci_map_single(adapter->pdev,
1738 skb->data, hdr_len, PCI_DMA_TODEVICE);
1739 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1740 return -ENOSPC;
1741
1742 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1743 mapped_len += map_len;
1744 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1745 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1746 ((cpu_to_le32(tx_buffer->length) &
1747 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1748 }
1749
1750 while (mapped_len < buf_len) {
1751 /* mapped_len == 0, means we should use the first tpd,
1752 which is given by caller */
1753 if (mapped_len == 0) {
1754 use_tpd = tpd;
1755 } else {
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 tx_buffer->skb = NULL;
1761
1762 tx_buffer->length = map_len =
1763 ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1764 MAX_TX_BUF_LEN : (buf_len - mapped_len);
1765 tx_buffer->dma =
1766 pci_map_single(adapter->pdev, skb->data + mapped_len,
1767 map_len, PCI_DMA_TODEVICE);
1768
1769 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1770 /* We need to unwind the mappings we've done */
1771 ring_end = adapter->tx_ring.next_to_use;
1772 adapter->tx_ring.next_to_use = ring_start;
1773 while (adapter->tx_ring.next_to_use != ring_end) {
1774 tpd = atl1e_get_tpd(adapter);
1775 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1776 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1777 tx_buffer->length, PCI_DMA_TODEVICE);
1778 }
1779 /* Reset the tx rings next pointer */
1780 adapter->tx_ring.next_to_use = ring_start;
1781 return -ENOSPC;
1782 }
1783
1784 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1785 mapped_len += map_len;
1786 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1787 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1788 ((cpu_to_le32(tx_buffer->length) &
1789 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1790 }
1791
1792 for (f = 0; f < nr_frags; f++) {
1793 const struct skb_frag_struct *frag;
1794 u16 i;
1795 u16 seg_num;
1796
1797 frag = &skb_shinfo(skb)->frags[f];
1798 buf_len = skb_frag_size(frag);
1799
1800 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1801 for (i = 0; i < seg_num; i++) {
1802 use_tpd = atl1e_get_tpd(adapter);
1803 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1804
1805 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1806 BUG_ON(tx_buffer->skb);
1807
1808 tx_buffer->skb = NULL;
1809 tx_buffer->length =
1810 (buf_len > MAX_TX_BUF_LEN) ?
1811 MAX_TX_BUF_LEN : buf_len;
1812 buf_len -= tx_buffer->length;
1813
1814 tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1815 frag,
1816 (i * MAX_TX_BUF_LEN),
1817 tx_buffer->length,
1818 DMA_TO_DEVICE);
1819
1820 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1821 /* We need to unwind the mappings we've done */
1822 ring_end = adapter->tx_ring.next_to_use;
1823 adapter->tx_ring.next_to_use = ring_start;
1824 while (adapter->tx_ring.next_to_use != ring_end) {
1825 tpd = atl1e_get_tpd(adapter);
1826 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1827 dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1828 tx_buffer->length, DMA_TO_DEVICE);
1829 }
1830
1831 /* Reset the ring next to use pointer */
1832 adapter->tx_ring.next_to_use = ring_start;
1833 return -ENOSPC;
1834 }
1835
1836 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1837 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1838 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1839 ((cpu_to_le32(tx_buffer->length) &
1840 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1841 }
1842 }
1843
1844 if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1845 /* note this one is a tcp header */
1846 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1847 /* The last tpd */
1848
1849 use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1850 /* The last buffer info contain the skb address,
1851 so it will be free after unmap */
1852 tx_buffer->skb = skb;
1853 return 0;
1854 }
1855
1856 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1857 struct atl1e_tpd_desc *tpd)
1858 {
1859 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1860 /* Force memory writes to complete before letting h/w
1861 * know there are new descriptors to fetch. (Only
1862 * applicable for weak-ordered memory model archs,
1863 * such as IA-64). */
1864 wmb();
1865 AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1866 }
1867
1868 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1869 struct net_device *netdev)
1870 {
1871 struct atl1e_adapter *adapter = netdev_priv(netdev);
1872 unsigned long flags;
1873 u16 tpd_req = 1;
1874 struct atl1e_tpd_desc *tpd;
1875
1876 if (test_bit(__AT_DOWN, &adapter->flags)) {
1877 dev_kfree_skb_any(skb);
1878 return NETDEV_TX_OK;
1879 }
1880
1881 if (unlikely(skb->len <= 0)) {
1882 dev_kfree_skb_any(skb);
1883 return NETDEV_TX_OK;
1884 }
1885 tpd_req = atl1e_cal_tdp_req(skb);
1886 if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1887 return NETDEV_TX_LOCKED;
1888
1889 if (atl1e_tpd_avail(adapter) < tpd_req) {
1890 /* no enough descriptor, just stop queue */
1891 netif_stop_queue(netdev);
1892 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1893 return NETDEV_TX_BUSY;
1894 }
1895
1896 tpd = atl1e_get_tpd(adapter);
1897
1898 if (vlan_tx_tag_present(skb)) {
1899 u16 vlan_tag = vlan_tx_tag_get(skb);
1900 u16 atl1e_vlan_tag;
1901
1902 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1903 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1904 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1905 TPD_VLAN_SHIFT;
1906 }
1907
1908 if (skb->protocol == htons(ETH_P_8021Q))
1909 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1910
1911 if (skb_network_offset(skb) != ETH_HLEN)
1912 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1913
1914 /* do TSO and check sum */
1915 if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1916 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1917 dev_kfree_skb_any(skb);
1918 return NETDEV_TX_OK;
1919 }
1920
1921 if (atl1e_tx_map(adapter, skb, tpd)) {
1922 dev_kfree_skb_any(skb);
1923 goto out;
1924 }
1925
1926 atl1e_tx_queue(adapter, tpd_req, tpd);
1927
1928 netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1929 out:
1930 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1931 return NETDEV_TX_OK;
1932 }
1933
1934 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1935 {
1936 struct net_device *netdev = adapter->netdev;
1937
1938 free_irq(adapter->pdev->irq, netdev);
1939 }
1940
1941 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1942 {
1943 struct pci_dev *pdev = adapter->pdev;
1944 struct net_device *netdev = adapter->netdev;
1945 int err = 0;
1946
1947 err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1948 netdev);
1949 if (err) {
1950 netdev_dbg(adapter->netdev,
1951 "Unable to allocate interrupt Error: %d\n", err);
1952 return err;
1953 }
1954 netdev_dbg(netdev, "atl1e_request_irq OK\n");
1955 return err;
1956 }
1957
1958 int atl1e_up(struct atl1e_adapter *adapter)
1959 {
1960 struct net_device *netdev = adapter->netdev;
1961 int err = 0;
1962 u32 val;
1963
1964 /* hardware has been reset, we need to reload some things */
1965 err = atl1e_init_hw(&adapter->hw);
1966 if (err) {
1967 err = -EIO;
1968 return err;
1969 }
1970 atl1e_init_ring_ptrs(adapter);
1971 atl1e_set_multi(netdev);
1972 atl1e_restore_vlan(adapter);
1973
1974 if (atl1e_configure(adapter)) {
1975 err = -EIO;
1976 goto err_up;
1977 }
1978
1979 clear_bit(__AT_DOWN, &adapter->flags);
1980 napi_enable(&adapter->napi);
1981 atl1e_irq_enable(adapter);
1982 val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1983 AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1984 val | MASTER_CTRL_MANUAL_INT);
1985
1986 err_up:
1987 return err;
1988 }
1989
1990 void atl1e_down(struct atl1e_adapter *adapter)
1991 {
1992 struct net_device *netdev = adapter->netdev;
1993
1994 /* signal that we're down so the interrupt handler does not
1995 * reschedule our watchdog timer */
1996 set_bit(__AT_DOWN, &adapter->flags);
1997
1998 netif_stop_queue(netdev);
1999
2000 /* reset MAC to disable all RX/TX */
2001 atl1e_reset_hw(&adapter->hw);
2002 msleep(1);
2003
2004 napi_disable(&adapter->napi);
2005 atl1e_del_timer(adapter);
2006 atl1e_irq_disable(adapter);
2007
2008 netif_carrier_off(netdev);
2009 adapter->link_speed = SPEED_0;
2010 adapter->link_duplex = -1;
2011 atl1e_clean_tx_ring(adapter);
2012 atl1e_clean_rx_ring(adapter);
2013 }
2014
2015 /**
2016 * atl1e_open - Called when a network interface is made active
2017 * @netdev: network interface device structure
2018 *
2019 * Returns 0 on success, negative value on failure
2020 *
2021 * The open entry point is called when a network interface is made
2022 * active by the system (IFF_UP). At this point all resources needed
2023 * for transmit and receive operations are allocated, the interrupt
2024 * handler is registered with the OS, the watchdog timer is started,
2025 * and the stack is notified that the interface is ready.
2026 */
2027 static int atl1e_open(struct net_device *netdev)
2028 {
2029 struct atl1e_adapter *adapter = netdev_priv(netdev);
2030 int err;
2031
2032 /* disallow open during test */
2033 if (test_bit(__AT_TESTING, &adapter->flags))
2034 return -EBUSY;
2035
2036 /* allocate rx/tx dma buffer & descriptors */
2037 atl1e_init_ring_resources(adapter);
2038 err = atl1e_setup_ring_resources(adapter);
2039 if (unlikely(err))
2040 return err;
2041
2042 err = atl1e_request_irq(adapter);
2043 if (unlikely(err))
2044 goto err_req_irq;
2045
2046 err = atl1e_up(adapter);
2047 if (unlikely(err))
2048 goto err_up;
2049
2050 return 0;
2051
2052 err_up:
2053 atl1e_free_irq(adapter);
2054 err_req_irq:
2055 atl1e_free_ring_resources(adapter);
2056 atl1e_reset_hw(&adapter->hw);
2057
2058 return err;
2059 }
2060
2061 /**
2062 * atl1e_close - Disables a network interface
2063 * @netdev: network interface device structure
2064 *
2065 * Returns 0, this is not allowed to fail
2066 *
2067 * The close entry point is called when an interface is de-activated
2068 * by the OS. The hardware is still under the drivers control, but
2069 * needs to be disabled. A global MAC reset is issued to stop the
2070 * hardware, and all transmit and receive resources are freed.
2071 */
2072 static int atl1e_close(struct net_device *netdev)
2073 {
2074 struct atl1e_adapter *adapter = netdev_priv(netdev);
2075
2076 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2077 atl1e_down(adapter);
2078 atl1e_free_irq(adapter);
2079 atl1e_free_ring_resources(adapter);
2080
2081 return 0;
2082 }
2083
2084 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2085 {
2086 struct net_device *netdev = pci_get_drvdata(pdev);
2087 struct atl1e_adapter *adapter = netdev_priv(netdev);
2088 struct atl1e_hw *hw = &adapter->hw;
2089 u32 ctrl = 0;
2090 u32 mac_ctrl_data = 0;
2091 u32 wol_ctrl_data = 0;
2092 u16 mii_advertise_data = 0;
2093 u16 mii_bmsr_data = 0;
2094 u16 mii_intr_status_data = 0;
2095 u32 wufc = adapter->wol;
2096 u32 i;
2097 #ifdef CONFIG_PM
2098 int retval = 0;
2099 #endif
2100
2101 if (netif_running(netdev)) {
2102 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2103 atl1e_down(adapter);
2104 }
2105 netif_device_detach(netdev);
2106
2107 #ifdef CONFIG_PM
2108 retval = pci_save_state(pdev);
2109 if (retval)
2110 return retval;
2111 #endif
2112
2113 if (wufc) {
2114 /* get link status */
2115 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2116 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2117
2118 mii_advertise_data = ADVERTISE_10HALF;
2119
2120 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2121 (atl1e_write_phy_reg(hw,
2122 MII_ADVERTISE, mii_advertise_data) != 0) ||
2123 (atl1e_phy_commit(hw)) != 0) {
2124 netdev_dbg(adapter->netdev, "set phy register failed\n");
2125 goto wol_dis;
2126 }
2127
2128 hw->phy_configured = false; /* re-init PHY when resume */
2129
2130 /* turn on magic packet wol */
2131 if (wufc & AT_WUFC_MAG)
2132 wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2133
2134 if (wufc & AT_WUFC_LNKC) {
2135 /* if orignal link status is link, just wait for retrive link */
2136 if (mii_bmsr_data & BMSR_LSTATUS) {
2137 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2138 msleep(100);
2139 atl1e_read_phy_reg(hw, MII_BMSR,
2140 &mii_bmsr_data);
2141 if (mii_bmsr_data & BMSR_LSTATUS)
2142 break;
2143 }
2144
2145 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2146 netdev_dbg(adapter->netdev,
2147 "Link may change when suspend\n");
2148 }
2149 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2150 /* only link up can wake up */
2151 if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2152 netdev_dbg(adapter->netdev,
2153 "read write phy register failed\n");
2154 goto wol_dis;
2155 }
2156 }
2157 /* clear phy interrupt */
2158 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2159 /* Config MAC Ctrl register */
2160 mac_ctrl_data = MAC_CTRL_RX_EN;
2161 /* set to 10/100M halt duplex */
2162 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2163 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2164 MAC_CTRL_PRMLEN_MASK) <<
2165 MAC_CTRL_PRMLEN_SHIFT);
2166
2167 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2168
2169 /* magic packet maybe Broadcast&multicast&Unicast frame */
2170 if (wufc & AT_WUFC_MAG)
2171 mac_ctrl_data |= MAC_CTRL_BC_EN;
2172
2173 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2174 mac_ctrl_data);
2175
2176 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2177 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2178 /* pcie patch */
2179 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2180 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2181 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2182 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2183 goto suspend_exit;
2184 }
2185 wol_dis:
2186
2187 /* WOL disabled */
2188 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2189
2190 /* pcie patch */
2191 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2192 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2193 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2194
2195 atl1e_force_ps(hw);
2196 hw->phy_configured = false; /* re-init PHY when resume */
2197
2198 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2199
2200 suspend_exit:
2201
2202 if (netif_running(netdev))
2203 atl1e_free_irq(adapter);
2204
2205 pci_disable_device(pdev);
2206
2207 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2208
2209 return 0;
2210 }
2211
2212 #ifdef CONFIG_PM
2213 static int atl1e_resume(struct pci_dev *pdev)
2214 {
2215 struct net_device *netdev = pci_get_drvdata(pdev);
2216 struct atl1e_adapter *adapter = netdev_priv(netdev);
2217 u32 err;
2218
2219 pci_set_power_state(pdev, PCI_D0);
2220 pci_restore_state(pdev);
2221
2222 err = pci_enable_device(pdev);
2223 if (err) {
2224 netdev_err(adapter->netdev,
2225 "Cannot enable PCI device from suspend\n");
2226 return err;
2227 }
2228
2229 pci_set_master(pdev);
2230
2231 AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2232
2233 pci_enable_wake(pdev, PCI_D3hot, 0);
2234 pci_enable_wake(pdev, PCI_D3cold, 0);
2235
2236 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2237
2238 if (netif_running(netdev)) {
2239 err = atl1e_request_irq(adapter);
2240 if (err)
2241 return err;
2242 }
2243
2244 atl1e_reset_hw(&adapter->hw);
2245
2246 if (netif_running(netdev))
2247 atl1e_up(adapter);
2248
2249 netif_device_attach(netdev);
2250
2251 return 0;
2252 }
2253 #endif
2254
2255 static void atl1e_shutdown(struct pci_dev *pdev)
2256 {
2257 atl1e_suspend(pdev, PMSG_SUSPEND);
2258 }
2259
2260 static const struct net_device_ops atl1e_netdev_ops = {
2261 .ndo_open = atl1e_open,
2262 .ndo_stop = atl1e_close,
2263 .ndo_start_xmit = atl1e_xmit_frame,
2264 .ndo_get_stats = atl1e_get_stats,
2265 .ndo_set_rx_mode = atl1e_set_multi,
2266 .ndo_validate_addr = eth_validate_addr,
2267 .ndo_set_mac_address = atl1e_set_mac_addr,
2268 .ndo_fix_features = atl1e_fix_features,
2269 .ndo_set_features = atl1e_set_features,
2270 .ndo_change_mtu = atl1e_change_mtu,
2271 .ndo_do_ioctl = atl1e_ioctl,
2272 .ndo_tx_timeout = atl1e_tx_timeout,
2273 #ifdef CONFIG_NET_POLL_CONTROLLER
2274 .ndo_poll_controller = atl1e_netpoll,
2275 #endif
2276
2277 };
2278
2279 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2280 {
2281 SET_NETDEV_DEV(netdev, &pdev->dev);
2282 pci_set_drvdata(pdev, netdev);
2283
2284 netdev->netdev_ops = &atl1e_netdev_ops;
2285
2286 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2287 atl1e_set_ethtool_ops(netdev);
2288
2289 netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2290 NETIF_F_HW_VLAN_CTAG_RX;
2291 netdev->features = netdev->hw_features | NETIF_F_LLTX |
2292 NETIF_F_HW_VLAN_CTAG_TX;
2293 /* not enabled by default */
2294 netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2295 return 0;
2296 }
2297
2298 /**
2299 * atl1e_probe - Device Initialization Routine
2300 * @pdev: PCI device information struct
2301 * @ent: entry in atl1e_pci_tbl
2302 *
2303 * Returns 0 on success, negative on failure
2304 *
2305 * atl1e_probe initializes an adapter identified by a pci_dev structure.
2306 * The OS initialization, configuring of the adapter private structure,
2307 * and a hardware reset occur.
2308 */
2309 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2310 {
2311 struct net_device *netdev;
2312 struct atl1e_adapter *adapter = NULL;
2313 static int cards_found;
2314
2315 int err = 0;
2316
2317 err = pci_enable_device(pdev);
2318 if (err) {
2319 dev_err(&pdev->dev, "cannot enable PCI device\n");
2320 return err;
2321 }
2322
2323 /*
2324 * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2325 * shared register for the high 32 bits, so only a single, aligned,
2326 * 4 GB physical address range can be used at a time.
2327 *
2328 * Supporting 64-bit DMA on this hardware is more trouble than it's
2329 * worth. It is far easier to limit to 32-bit DMA than update
2330 * various kernel subsystems to support the mechanics required by a
2331 * fixed-high-32-bit system.
2332 */
2333 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2334 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2335 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2336 goto err_dma;
2337 }
2338
2339 err = pci_request_regions(pdev, atl1e_driver_name);
2340 if (err) {
2341 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2342 goto err_pci_reg;
2343 }
2344
2345 pci_set_master(pdev);
2346
2347 netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2348 if (netdev == NULL) {
2349 err = -ENOMEM;
2350 goto err_alloc_etherdev;
2351 }
2352
2353 err = atl1e_init_netdev(netdev, pdev);
2354 if (err) {
2355 netdev_err(netdev, "init netdevice failed\n");
2356 goto err_init_netdev;
2357 }
2358 adapter = netdev_priv(netdev);
2359 adapter->bd_number = cards_found;
2360 adapter->netdev = netdev;
2361 adapter->pdev = pdev;
2362 adapter->hw.adapter = adapter;
2363 adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2364 if (!adapter->hw.hw_addr) {
2365 err = -EIO;
2366 netdev_err(netdev, "cannot map device registers\n");
2367 goto err_ioremap;
2368 }
2369
2370 /* init mii data */
2371 adapter->mii.dev = netdev;
2372 adapter->mii.mdio_read = atl1e_mdio_read;
2373 adapter->mii.mdio_write = atl1e_mdio_write;
2374 adapter->mii.phy_id_mask = 0x1f;
2375 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2376
2377 netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2378
2379 init_timer(&adapter->phy_config_timer);
2380 adapter->phy_config_timer.function = atl1e_phy_config;
2381 adapter->phy_config_timer.data = (unsigned long) adapter;
2382
2383 /* get user settings */
2384 atl1e_check_options(adapter);
2385 /*
2386 * Mark all PCI regions associated with PCI device
2387 * pdev as being reserved by owner atl1e_driver_name
2388 * Enables bus-mastering on the device and calls
2389 * pcibios_set_master to do the needed arch specific settings
2390 */
2391 atl1e_setup_pcicmd(pdev);
2392 /* setup the private structure */
2393 err = atl1e_sw_init(adapter);
2394 if (err) {
2395 netdev_err(netdev, "net device private data init failed\n");
2396 goto err_sw_init;
2397 }
2398
2399 /* Init GPHY as early as possible due to power saving issue */
2400 atl1e_phy_init(&adapter->hw);
2401 /* reset the controller to
2402 * put the device in a known good starting state */
2403 err = atl1e_reset_hw(&adapter->hw);
2404 if (err) {
2405 err = -EIO;
2406 goto err_reset;
2407 }
2408
2409 if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2410 err = -EIO;
2411 netdev_err(netdev, "get mac address failed\n");
2412 goto err_eeprom;
2413 }
2414
2415 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2416 netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2417
2418 INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2419 INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2420 netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2421 err = register_netdev(netdev);
2422 if (err) {
2423 netdev_err(netdev, "register netdevice failed\n");
2424 goto err_register;
2425 }
2426
2427 /* assume we have no link for now */
2428 netif_stop_queue(netdev);
2429 netif_carrier_off(netdev);
2430
2431 cards_found++;
2432
2433 return 0;
2434
2435 err_reset:
2436 err_register:
2437 err_sw_init:
2438 err_eeprom:
2439 pci_iounmap(pdev, adapter->hw.hw_addr);
2440 err_init_netdev:
2441 err_ioremap:
2442 free_netdev(netdev);
2443 err_alloc_etherdev:
2444 pci_release_regions(pdev);
2445 err_pci_reg:
2446 err_dma:
2447 pci_disable_device(pdev);
2448 return err;
2449 }
2450
2451 /**
2452 * atl1e_remove - Device Removal Routine
2453 * @pdev: PCI device information struct
2454 *
2455 * atl1e_remove is called by the PCI subsystem to alert the driver
2456 * that it should release a PCI device. The could be caused by a
2457 * Hot-Plug event, or because the driver is going to be removed from
2458 * memory.
2459 */
2460 static void atl1e_remove(struct pci_dev *pdev)
2461 {
2462 struct net_device *netdev = pci_get_drvdata(pdev);
2463 struct atl1e_adapter *adapter = netdev_priv(netdev);
2464
2465 /*
2466 * flush_scheduled work may reschedule our watchdog task, so
2467 * explicitly disable watchdog tasks from being rescheduled
2468 */
2469 set_bit(__AT_DOWN, &adapter->flags);
2470
2471 atl1e_del_timer(adapter);
2472 atl1e_cancel_work(adapter);
2473
2474 unregister_netdev(netdev);
2475 atl1e_free_ring_resources(adapter);
2476 atl1e_force_ps(&adapter->hw);
2477 pci_iounmap(pdev, adapter->hw.hw_addr);
2478 pci_release_regions(pdev);
2479 free_netdev(netdev);
2480 pci_disable_device(pdev);
2481 }
2482
2483 /**
2484 * atl1e_io_error_detected - called when PCI error is detected
2485 * @pdev: Pointer to PCI device
2486 * @state: The current pci connection state
2487 *
2488 * This function is called after a PCI bus error affecting
2489 * this device has been detected.
2490 */
2491 static pci_ers_result_t
2492 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2493 {
2494 struct net_device *netdev = pci_get_drvdata(pdev);
2495 struct atl1e_adapter *adapter = netdev_priv(netdev);
2496
2497 netif_device_detach(netdev);
2498
2499 if (state == pci_channel_io_perm_failure)
2500 return PCI_ERS_RESULT_DISCONNECT;
2501
2502 if (netif_running(netdev))
2503 atl1e_down(adapter);
2504
2505 pci_disable_device(pdev);
2506
2507 /* Request a slot slot reset. */
2508 return PCI_ERS_RESULT_NEED_RESET;
2509 }
2510
2511 /**
2512 * atl1e_io_slot_reset - called after the pci bus has been reset.
2513 * @pdev: Pointer to PCI device
2514 *
2515 * Restart the card from scratch, as if from a cold-boot. Implementation
2516 * resembles the first-half of the e1000_resume routine.
2517 */
2518 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2519 {
2520 struct net_device *netdev = pci_get_drvdata(pdev);
2521 struct atl1e_adapter *adapter = netdev_priv(netdev);
2522
2523 if (pci_enable_device(pdev)) {
2524 netdev_err(adapter->netdev,
2525 "Cannot re-enable PCI device after reset\n");
2526 return PCI_ERS_RESULT_DISCONNECT;
2527 }
2528 pci_set_master(pdev);
2529
2530 pci_enable_wake(pdev, PCI_D3hot, 0);
2531 pci_enable_wake(pdev, PCI_D3cold, 0);
2532
2533 atl1e_reset_hw(&adapter->hw);
2534
2535 return PCI_ERS_RESULT_RECOVERED;
2536 }
2537
2538 /**
2539 * atl1e_io_resume - called when traffic can start flowing again.
2540 * @pdev: Pointer to PCI device
2541 *
2542 * This callback is called when the error recovery driver tells us that
2543 * its OK to resume normal operation. Implementation resembles the
2544 * second-half of the atl1e_resume routine.
2545 */
2546 static void atl1e_io_resume(struct pci_dev *pdev)
2547 {
2548 struct net_device *netdev = pci_get_drvdata(pdev);
2549 struct atl1e_adapter *adapter = netdev_priv(netdev);
2550
2551 if (netif_running(netdev)) {
2552 if (atl1e_up(adapter)) {
2553 netdev_err(adapter->netdev,
2554 "can't bring device back up after reset\n");
2555 return;
2556 }
2557 }
2558
2559 netif_device_attach(netdev);
2560 }
2561
2562 static const struct pci_error_handlers atl1e_err_handler = {
2563 .error_detected = atl1e_io_error_detected,
2564 .slot_reset = atl1e_io_slot_reset,
2565 .resume = atl1e_io_resume,
2566 };
2567
2568 static struct pci_driver atl1e_driver = {
2569 .name = atl1e_driver_name,
2570 .id_table = atl1e_pci_tbl,
2571 .probe = atl1e_probe,
2572 .remove = atl1e_remove,
2573 /* Power Management Hooks */
2574 #ifdef CONFIG_PM
2575 .suspend = atl1e_suspend,
2576 .resume = atl1e_resume,
2577 #endif
2578 .shutdown = atl1e_shutdown,
2579 .err_handler = &atl1e_err_handler
2580 };
2581
2582 module_pci_driver(atl1e_driver);
Linux kernel - Deliverables
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