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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / atheros / atl1e / atl1e_main.c
blobe0d89942d537e3a85d5e105bc08f7f43dc409e3d
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
4 *
5 * Derived from Intel e1000 driver
6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
7 */
8
9 #include "atl1e.h"
10
11 #define DRV_VERSION "1.0.0.7-NAPI"
12
13 char atl1e_driver_name[] = "ATL1E";
14 char atl1e_driver_version[] = DRV_VERSION;
15 #define PCI_DEVICE_ID_ATTANSIC_L1E 0x1026
16 /*
17 * atl1e_pci_tbl - PCI Device ID Table
18 *
19 * Wildcard entries (PCI_ANY_ID) should come last
20 * Last entry must be all 0s
21 *
22 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
23 * Class, Class Mask, private data (not used) }
24 */
25 static const struct pci_device_id atl1e_pci_tbl[] = {
26 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
27 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
28 /* required last entry */
29 { 0 }
30 };
31 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
32
33 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
34 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
35 MODULE_LICENSE("GPL");
36 MODULE_VERSION(DRV_VERSION);
37
38 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
39
40 static const u16
41 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
42 {
43 {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
44 {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
45 {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
46 {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
47 };
48
49 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
50 {
51 REG_RXF0_BASE_ADDR_HI,
52 REG_RXF1_BASE_ADDR_HI,
53 REG_RXF2_BASE_ADDR_HI,
54 REG_RXF3_BASE_ADDR_HI
55 };
56
57 static const u16
58 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
59 {
60 {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
61 {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
62 {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
63 {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
64 };
65
66 static const u16
67 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
68 {
69 {REG_HOST_RXF0_MB0_LO, REG_HOST_RXF0_MB1_LO},
70 {REG_HOST_RXF1_MB0_LO, REG_HOST_RXF1_MB1_LO},
71 {REG_HOST_RXF2_MB0_LO, REG_HOST_RXF2_MB1_LO},
72 {REG_HOST_RXF3_MB0_LO, REG_HOST_RXF3_MB1_LO}
73 };
74
75 static const u16 atl1e_pay_load_size[] = {
76 128, 256, 512, 1024, 2048, 4096,
77 };
78
79 /**
80 * atl1e_irq_enable - Enable default interrupt generation settings
81 * @adapter: board private structure
82 */
83 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
84 {
85 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
86 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
87 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
88 AT_WRITE_FLUSH(&adapter->hw);
89 }
90 }
91
92 /**
93 * atl1e_irq_disable - Mask off interrupt generation on the NIC
94 * @adapter: board private structure
95 */
96 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
97 {
98 atomic_inc(&adapter->irq_sem);
99 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
100 AT_WRITE_FLUSH(&adapter->hw);
101 synchronize_irq(adapter->pdev->irq);
102 }
103
104 /**
105 * atl1e_irq_reset - reset interrupt confiure on the NIC
106 * @adapter: board private structure
107 */
108 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
109 {
110 atomic_set(&adapter->irq_sem, 0);
111 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
112 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
113 AT_WRITE_FLUSH(&adapter->hw);
114 }
115
116 /**
117 * atl1e_phy_config - Timer Call-back
118 * @data: pointer to netdev cast into an unsigned long
119 */
120 static void atl1e_phy_config(struct timer_list *t)
121 {
122 struct atl1e_adapter *adapter = from_timer(adapter, t,
123 phy_config_timer);
124 struct atl1e_hw *hw = &adapter->hw;
125 unsigned long flags;
126
127 spin_lock_irqsave(&adapter->mdio_lock, flags);
128 atl1e_restart_autoneg(hw);
129 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
130 }
131
132 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
133 {
134
135 WARN_ON(in_interrupt());
136 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
137 msleep(1);
138 atl1e_down(adapter);
139 atl1e_up(adapter);
140 clear_bit(__AT_RESETTING, &adapter->flags);
141 }
142
143 static void atl1e_reset_task(struct work_struct *work)
144 {
145 struct atl1e_adapter *adapter;
146 adapter = container_of(work, struct atl1e_adapter, reset_task);
147
148 atl1e_reinit_locked(adapter);
149 }
150
151 static int atl1e_check_link(struct atl1e_adapter *adapter)
152 {
153 struct atl1e_hw *hw = &adapter->hw;
154 struct net_device *netdev = adapter->netdev;
155 int err = 0;
156 u16 speed, duplex, phy_data;
157
158 /* MII_BMSR must read twice */
159 atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
160 atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
161 if ((phy_data & BMSR_LSTATUS) == 0) {
162 /* link down */
163 if (netif_carrier_ok(netdev)) { /* old link state: Up */
164 u32 value;
165 /* disable rx */
166 value = AT_READ_REG(hw, REG_MAC_CTRL);
167 value &= ~MAC_CTRL_RX_EN;
168 AT_WRITE_REG(hw, REG_MAC_CTRL, value);
169 adapter->link_speed = SPEED_0;
170 netif_carrier_off(netdev);
171 netif_stop_queue(netdev);
172 }
173 } else {
174 /* Link Up */
175 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
176 if (unlikely(err))
177 return err;
178
179 /* link result is our setting */
180 if (adapter->link_speed != speed ||
181 adapter->link_duplex != duplex) {
182 adapter->link_speed = speed;
183 adapter->link_duplex = duplex;
184 atl1e_setup_mac_ctrl(adapter);
185 netdev_info(netdev,
186 "NIC Link is Up <%d Mbps %s Duplex>\n",
187 adapter->link_speed,
188 adapter->link_duplex == FULL_DUPLEX ?
189 "Full" : "Half");
190 }
191
192 if (!netif_carrier_ok(netdev)) {
193 /* Link down -> Up */
194 netif_carrier_on(netdev);
195 netif_wake_queue(netdev);
196 }
197 }
198 return 0;
199 }
200
201 /**
202 * atl1e_link_chg_task - deal with link change event Out of interrupt context
203 * @netdev: network interface device structure
204 */
205 static void atl1e_link_chg_task(struct work_struct *work)
206 {
207 struct atl1e_adapter *adapter;
208 unsigned long flags;
209
210 adapter = container_of(work, struct atl1e_adapter, link_chg_task);
211 spin_lock_irqsave(&adapter->mdio_lock, flags);
212 atl1e_check_link(adapter);
213 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
214 }
215
216 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
217 {
218 struct net_device *netdev = adapter->netdev;
219 u16 phy_data = 0;
220 u16 link_up = 0;
221
222 spin_lock(&adapter->mdio_lock);
223 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
224 atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
225 spin_unlock(&adapter->mdio_lock);
226 link_up = phy_data & BMSR_LSTATUS;
227 /* notify upper layer link down ASAP */
228 if (!link_up) {
229 if (netif_carrier_ok(netdev)) {
230 /* old link state: Up */
231 netdev_info(netdev, "NIC Link is Down\n");
232 adapter->link_speed = SPEED_0;
233 netif_stop_queue(netdev);
234 }
235 }
236 schedule_work(&adapter->link_chg_task);
237 }
238
239 static void atl1e_del_timer(struct atl1e_adapter *adapter)
240 {
241 del_timer_sync(&adapter->phy_config_timer);
242 }
243
244 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
245 {
246 cancel_work_sync(&adapter->reset_task);
247 cancel_work_sync(&adapter->link_chg_task);
248 }
249
250 /**
251 * atl1e_tx_timeout - Respond to a Tx Hang
252 * @netdev: network interface device structure
253 */
254 static void atl1e_tx_timeout(struct net_device *netdev, unsigned int txqueue)
255 {
256 struct atl1e_adapter *adapter = netdev_priv(netdev);
257
258 /* Do the reset outside of interrupt context */
259 schedule_work(&adapter->reset_task);
260 }
261
262 /**
263 * atl1e_set_multi - Multicast and Promiscuous mode set
264 * @netdev: network interface device structure
265 *
266 * The set_multi entry point is called whenever the multicast address
267 * list or the network interface flags are updated. This routine is
268 * responsible for configuring the hardware for proper multicast,
269 * promiscuous mode, and all-multi behavior.
270 */
271 static void atl1e_set_multi(struct net_device *netdev)
272 {
273 struct atl1e_adapter *adapter = netdev_priv(netdev);
274 struct atl1e_hw *hw = &adapter->hw;
275 struct netdev_hw_addr *ha;
276 u32 mac_ctrl_data = 0;
277 u32 hash_value;
278
279 /* Check for Promiscuous and All Multicast modes */
280 mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
281
282 if (netdev->flags & IFF_PROMISC) {
283 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
284 } else if (netdev->flags & IFF_ALLMULTI) {
285 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
286 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
287 } else {
288 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
289 }
290
291 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
292
293 /* clear the old settings from the multicast hash table */
294 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
295 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
296
297 /* comoute mc addresses' hash value ,and put it into hash table */
298 netdev_for_each_mc_addr(ha, netdev) {
299 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
300 atl1e_hash_set(hw, hash_value);
301 }
302 }
303
304 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
305 {
306
307 if (features & NETIF_F_RXALL) {
308 /* enable RX of ALL frames */
309 *mac_ctrl_data |= MAC_CTRL_DBG;
310 } else {
311 /* disable RX of ALL frames */
312 *mac_ctrl_data &= ~MAC_CTRL_DBG;
313 }
314 }
315
316 static void atl1e_rx_mode(struct net_device *netdev,
317 netdev_features_t features)
318 {
319 struct atl1e_adapter *adapter = netdev_priv(netdev);
320 u32 mac_ctrl_data = 0;
321
322 netdev_dbg(adapter->netdev, "%s\n", __func__);
323
324 atl1e_irq_disable(adapter);
325 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
326 __atl1e_rx_mode(features, &mac_ctrl_data);
327 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
328 atl1e_irq_enable(adapter);
329 }
330
331
332 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
333 {
334 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
335 /* enable VLAN tag insert/strip */
336 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
337 } else {
338 /* disable VLAN tag insert/strip */
339 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
340 }
341 }
342
343 static void atl1e_vlan_mode(struct net_device *netdev,
344 netdev_features_t features)
345 {
346 struct atl1e_adapter *adapter = netdev_priv(netdev);
347 u32 mac_ctrl_data = 0;
348
349 netdev_dbg(adapter->netdev, "%s\n", __func__);
350
351 atl1e_irq_disable(adapter);
352 mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
353 __atl1e_vlan_mode(features, &mac_ctrl_data);
354 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
355 atl1e_irq_enable(adapter);
356 }
357
358 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
359 {
360 netdev_dbg(adapter->netdev, "%s\n", __func__);
361 atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
362 }
363
364 /**
365 * atl1e_set_mac - Change the Ethernet Address of the NIC
366 * @netdev: network interface device structure
367 * @p: pointer to an address structure
368 *
369 * Returns 0 on success, negative on failure
370 */
371 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
372 {
373 struct atl1e_adapter *adapter = netdev_priv(netdev);
374 struct sockaddr *addr = p;
375
376 if (!is_valid_ether_addr(addr->sa_data))
377 return -EADDRNOTAVAIL;
378
379 if (netif_running(netdev))
380 return -EBUSY;
381
382 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
383 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
384
385 atl1e_hw_set_mac_addr(&adapter->hw);
386
387 return 0;
388 }
389
390 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
391 netdev_features_t features)
392 {
393 /*
394 * Since there is no support for separate rx/tx vlan accel
395 * enable/disable make sure tx flag is always in same state as rx.
396 */
397 if (features & NETIF_F_HW_VLAN_CTAG_RX)
398 features |= NETIF_F_HW_VLAN_CTAG_TX;
399 else
400 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
401
402 return features;
403 }
404
405 static int atl1e_set_features(struct net_device *netdev,
406 netdev_features_t features)
407 {
408 netdev_features_t changed = netdev->features ^ features;
409
410 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
411 atl1e_vlan_mode(netdev, features);
412
413 if (changed & NETIF_F_RXALL)
414 atl1e_rx_mode(netdev, features);
415
416
417 return 0;
418 }
419
420 /**
421 * atl1e_change_mtu - Change the Maximum Transfer Unit
422 * @netdev: network interface device structure
423 * @new_mtu: new value for maximum frame size
424 *
425 * Returns 0 on success, negative on failure
426 */
427 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
428 {
429 struct atl1e_adapter *adapter = netdev_priv(netdev);
430 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
431
432 /* set MTU */
433 if (netif_running(netdev)) {
434 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
435 msleep(1);
436 netdev->mtu = new_mtu;
437 adapter->hw.max_frame_size = new_mtu;
438 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
439 atl1e_down(adapter);
440 atl1e_up(adapter);
441 clear_bit(__AT_RESETTING, &adapter->flags);
442 }
443 return 0;
444 }
445
446 /*
447 * caller should hold mdio_lock
448 */
449 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
450 {
451 struct atl1e_adapter *adapter = netdev_priv(netdev);
452 u16 result;
453
454 atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
455 return result;
456 }
457
458 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
459 int reg_num, int val)
460 {
461 struct atl1e_adapter *adapter = netdev_priv(netdev);
462
463 if (atl1e_write_phy_reg(&adapter->hw,
464 reg_num & MDIO_REG_ADDR_MASK, val))
465 netdev_err(netdev, "write phy register failed\n");
466 }
467
468 static int atl1e_mii_ioctl(struct net_device *netdev,
469 struct ifreq *ifr, int cmd)
470 {
471 struct atl1e_adapter *adapter = netdev_priv(netdev);
472 struct mii_ioctl_data *data = if_mii(ifr);
473 unsigned long flags;
474 int retval = 0;
475
476 if (!netif_running(netdev))
477 return -EINVAL;
478
479 spin_lock_irqsave(&adapter->mdio_lock, flags);
480 switch (cmd) {
481 case SIOCGMIIPHY:
482 data->phy_id = 0;
483 break;
484
485 case SIOCGMIIREG:
486 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
487 &data->val_out)) {
488 retval = -EIO;
489 goto out;
490 }
491 break;
492
493 case SIOCSMIIREG:
494 if (data->reg_num & ~(0x1F)) {
495 retval = -EFAULT;
496 goto out;
497 }
498
499 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
500 data->reg_num, data->val_in);
501 if (atl1e_write_phy_reg(&adapter->hw,
502 data->reg_num, data->val_in)) {
503 retval = -EIO;
504 goto out;
505 }
506 break;
507
508 default:
509 retval = -EOPNOTSUPP;
510 break;
511 }
512 out:
513 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
514 return retval;
515
516 }
517
518 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
519 {
520 switch (cmd) {
521 case SIOCGMIIPHY:
522 case SIOCGMIIREG:
523 case SIOCSMIIREG:
524 return atl1e_mii_ioctl(netdev, ifr, cmd);
525 default:
526 return -EOPNOTSUPP;
527 }
528 }
529
530 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
531 {
532 u16 cmd;
533
534 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
535 cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
536 cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
537 pci_write_config_word(pdev, PCI_COMMAND, cmd);
538
539 /*
540 * some motherboards BIOS(PXE/EFI) driver may set PME
541 * while they transfer control to OS (Windows/Linux)
542 * so we should clear this bit before NIC work normally
543 */
544 pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
545 msleep(1);
546 }
547
548 /**
549 * atl1e_alloc_queues - Allocate memory for all rings
550 * @adapter: board private structure to initialize
551 *
552 */
553 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
554 {
555 return 0;
556 }
557
558 /**
559 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
560 * @adapter: board private structure to initialize
561 *
562 * atl1e_sw_init initializes the Adapter private data structure.
563 * Fields are initialized based on PCI device information and
564 * OS network device settings (MTU size).
565 */
566 static int atl1e_sw_init(struct atl1e_adapter *adapter)
567 {
568 struct atl1e_hw *hw = &adapter->hw;
569 struct pci_dev *pdev = adapter->pdev;
570 u32 phy_status_data = 0;
571
572 adapter->wol = 0;
573 adapter->link_speed = SPEED_0; /* hardware init */
574 adapter->link_duplex = FULL_DUPLEX;
575 adapter->num_rx_queues = 1;
576
577 /* PCI config space info */
578 hw->vendor_id = pdev->vendor;
579 hw->device_id = pdev->device;
580 hw->subsystem_vendor_id = pdev->subsystem_vendor;
581 hw->subsystem_id = pdev->subsystem_device;
582 hw->revision_id = pdev->revision;
583
584 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
585
586 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
587 /* nic type */
588 if (hw->revision_id >= 0xF0) {
589 hw->nic_type = athr_l2e_revB;
590 } else {
591 if (phy_status_data & PHY_STATUS_100M)
592 hw->nic_type = athr_l1e;
593 else
594 hw->nic_type = athr_l2e_revA;
595 }
596
597 phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
598
599 if (phy_status_data & PHY_STATUS_EMI_CA)
600 hw->emi_ca = true;
601 else
602 hw->emi_ca = false;
603
604 hw->phy_configured = false;
605 hw->preamble_len = 7;
606 hw->max_frame_size = adapter->netdev->mtu;
607 hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
608 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
609
610 hw->rrs_type = atl1e_rrs_disable;
611 hw->indirect_tab = 0;
612 hw->base_cpu = 0;
613
614 /* need confirm */
615
616 hw->ict = 50000; /* 100ms */
617 hw->smb_timer = 200000; /* 200ms */
618 hw->tpd_burst = 5;
619 hw->rrd_thresh = 1;
620 hw->tpd_thresh = adapter->tx_ring.count / 2;
621 hw->rx_count_down = 4; /* 2us resolution */
622 hw->tx_count_down = hw->imt * 4 / 3;
623 hw->dmar_block = atl1e_dma_req_1024;
624 hw->dmaw_block = atl1e_dma_req_1024;
625 hw->dmar_dly_cnt = 15;
626 hw->dmaw_dly_cnt = 4;
627
628 if (atl1e_alloc_queues(adapter)) {
629 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
630 return -ENOMEM;
631 }
632
633 atomic_set(&adapter->irq_sem, 1);
634 spin_lock_init(&adapter->mdio_lock);
635
636 set_bit(__AT_DOWN, &adapter->flags);
637
638 return 0;
639 }
640
641 /**
642 * atl1e_clean_tx_ring - Free Tx-skb
643 * @adapter: board private structure
644 */
645 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
646 {
647 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
648 struct atl1e_tx_buffer *tx_buffer = NULL;
649 struct pci_dev *pdev = adapter->pdev;
650 u16 index, ring_count;
651
652 if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
653 return;
654
655 ring_count = tx_ring->count;
656 /* first unmmap dma */
657 for (index = 0; index < ring_count; index++) {
658 tx_buffer = &tx_ring->tx_buffer[index];
659 if (tx_buffer->dma) {
660 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
661 pci_unmap_single(pdev, tx_buffer->dma,
662 tx_buffer->length, PCI_DMA_TODEVICE);
663 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
664 pci_unmap_page(pdev, tx_buffer->dma,
665 tx_buffer->length, PCI_DMA_TODEVICE);
666 tx_buffer->dma = 0;
667 }
668 }
669 /* second free skb */
670 for (index = 0; index < ring_count; index++) {
671 tx_buffer = &tx_ring->tx_buffer[index];
672 if (tx_buffer->skb) {
673 dev_kfree_skb_any(tx_buffer->skb);
674 tx_buffer->skb = NULL;
675 }
676 }
677 /* Zero out Tx-buffers */
678 memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
679 ring_count);
680 memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
681 ring_count);
682 }
683
684 /**
685 * atl1e_clean_rx_ring - Free rx-reservation skbs
686 * @adapter: board private structure
687 */
688 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
689 {
690 struct atl1e_rx_ring *rx_ring =
691 &adapter->rx_ring;
692 struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
693 u16 i, j;
694
695
696 if (adapter->ring_vir_addr == NULL)
697 return;
698 /* Zero out the descriptor ring */
699 for (i = 0; i < adapter->num_rx_queues; i++) {
700 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
701 if (rx_page_desc[i].rx_page[j].addr != NULL) {
702 memset(rx_page_desc[i].rx_page[j].addr, 0,
703 rx_ring->real_page_size);
704 }
705 }
706 }
707 }
708
709 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
710 {
711 *ring_size = ((u32)(adapter->tx_ring.count *
712 sizeof(struct atl1e_tpd_desc) + 7
713 /* tx ring, qword align */
714 + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
715 adapter->num_rx_queues + 31
716 /* rx ring, 32 bytes align */
717 + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
718 sizeof(u32) + 3));
719 /* tx, rx cmd, dword align */
720 }
721
722 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
723 {
724 struct atl1e_rx_ring *rx_ring = NULL;
725
726 rx_ring = &adapter->rx_ring;
727
728 rx_ring->real_page_size = adapter->rx_ring.page_size
729 + adapter->hw.max_frame_size
730 + ETH_HLEN + VLAN_HLEN
731 + ETH_FCS_LEN;
732 rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
733 atl1e_cal_ring_size(adapter, &adapter->ring_size);
734
735 adapter->ring_vir_addr = NULL;
736 adapter->rx_ring.desc = NULL;
737 rwlock_init(&adapter->tx_ring.tx_lock);
738 }
739
740 /*
741 * Read / Write Ptr Initialize:
742 */
743 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
744 {
745 struct atl1e_tx_ring *tx_ring = NULL;
746 struct atl1e_rx_ring *rx_ring = NULL;
747 struct atl1e_rx_page_desc *rx_page_desc = NULL;
748 int i, j;
749
750 tx_ring = &adapter->tx_ring;
751 rx_ring = &adapter->rx_ring;
752 rx_page_desc = rx_ring->rx_page_desc;
753
754 tx_ring->next_to_use = 0;
755 atomic_set(&tx_ring->next_to_clean, 0);
756
757 for (i = 0; i < adapter->num_rx_queues; i++) {
758 rx_page_desc[i].rx_using = 0;
759 rx_page_desc[i].rx_nxseq = 0;
760 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
761 *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
762 rx_page_desc[i].rx_page[j].read_offset = 0;
763 }
764 }
765 }
766
767 /**
768 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
769 * @adapter: board private structure
770 *
771 * Free all transmit software resources
772 */
773 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
774 {
775 struct pci_dev *pdev = adapter->pdev;
776
777 atl1e_clean_tx_ring(adapter);
778 atl1e_clean_rx_ring(adapter);
779
780 if (adapter->ring_vir_addr) {
781 pci_free_consistent(pdev, adapter->ring_size,
782 adapter->ring_vir_addr, adapter->ring_dma);
783 adapter->ring_vir_addr = NULL;
784 }
785
786 if (adapter->tx_ring.tx_buffer) {
787 kfree(adapter->tx_ring.tx_buffer);
788 adapter->tx_ring.tx_buffer = NULL;
789 }
790 }
791
792 /**
793 * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
794 * @adapter: board private structure
795 *
796 * Return 0 on success, negative on failure
797 */
798 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
799 {
800 struct pci_dev *pdev = adapter->pdev;
801 struct atl1e_tx_ring *tx_ring;
802 struct atl1e_rx_ring *rx_ring;
803 struct atl1e_rx_page_desc *rx_page_desc;
804 int size, i, j;
805 u32 offset = 0;
806 int err = 0;
807
808 if (adapter->ring_vir_addr != NULL)
809 return 0; /* alloced already */
810
811 tx_ring = &adapter->tx_ring;
812 rx_ring = &adapter->rx_ring;
813
814 /* real ring DMA buffer */
815
816 size = adapter->ring_size;
817 adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
818 &adapter->ring_dma);
819 if (adapter->ring_vir_addr == NULL) {
820 netdev_err(adapter->netdev,
821 "pci_alloc_consistent failed, size = D%d\n", size);
822 return -ENOMEM;
823 }
824
825 rx_page_desc = rx_ring->rx_page_desc;
826
827 /* Init TPD Ring */
828 tx_ring->dma = roundup(adapter->ring_dma, 8);
829 offset = tx_ring->dma - adapter->ring_dma;
830 tx_ring->desc = adapter->ring_vir_addr + offset;
831 size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
832 tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
833 if (tx_ring->tx_buffer == NULL) {
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(struct atl1e_adapter *adapter)
885 {
886
887 struct atl1e_hw *hw = &adapter->hw;
888 struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
889 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
890 struct atl1e_rx_page_desc *rx_page_desc = NULL;
891 int i, j;
892
893 AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
894 (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
895 AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
896 (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
897 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
898 AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
899 (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
900
901 rx_page_desc = rx_ring->rx_page_desc;
902 /* RXF Page Physical address / Page Length */
903 for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
904 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
905 (u32)((adapter->ring_dma &
906 AT_DMA_HI_ADDR_MASK) >> 32));
907 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
908 u32 page_phy_addr;
909 u32 offset_phy_addr;
910
911 page_phy_addr = rx_page_desc[i].rx_page[j].dma;
912 offset_phy_addr =
913 rx_page_desc[i].rx_page[j].write_offset_dma;
914
915 AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
916 page_phy_addr & AT_DMA_LO_ADDR_MASK);
917 AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
918 offset_phy_addr & AT_DMA_LO_ADDR_MASK);
919 AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
920 }
921 }
922 /* Page Length */
923 AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
924 /* Load all of base address above */
925 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
926 }
927
928 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
929 {
930 struct atl1e_hw *hw = &adapter->hw;
931 u32 dev_ctrl_data = 0;
932 u32 max_pay_load = 0;
933 u32 jumbo_thresh = 0;
934 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
935
936 /* configure TXQ param */
937 if (hw->nic_type != athr_l2e_revB) {
938 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
939 if (hw->max_frame_size <= 1500) {
940 jumbo_thresh = hw->max_frame_size + extra_size;
941 } else if (hw->max_frame_size < 6*1024) {
942 jumbo_thresh =
943 (hw->max_frame_size + extra_size) * 2 / 3;
944 } else {
945 jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
946 }
947 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
948 }
949
950 dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
951
952 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
953 DEVICE_CTRL_MAX_PAYLOAD_MASK;
954
955 hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
956
957 max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
958 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
959 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
960
961 if (hw->nic_type != athr_l2e_revB)
962 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
963 atl1e_pay_load_size[hw->dmar_block]);
964 /* enable TXQ */
965 AT_WRITE_REGW(hw, REG_TXQ_CTRL,
966 (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
967 << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
968 | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
969 }
970
971 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
972 {
973 struct atl1e_hw *hw = &adapter->hw;
974 u32 rxf_len = 0;
975 u32 rxf_low = 0;
976 u32 rxf_high = 0;
977 u32 rxf_thresh_data = 0;
978 u32 rxq_ctrl_data = 0;
979
980 if (hw->nic_type != athr_l2e_revB) {
981 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
982 (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
983 RXQ_JMBOSZ_TH_SHIFT |
984 (1 & RXQ_JMBO_LKAH_MASK) <<
985 RXQ_JMBO_LKAH_SHIFT));
986
987 rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
988 rxf_high = rxf_len * 4 / 5;
989 rxf_low = rxf_len / 5;
990 rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK)
991 << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
992 ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
993 << RXQ_RXF_PAUSE_TH_LO_SHIFT);
994
995 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
996 }
997
998 /* RRS */
999 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1000 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1001
1002 if (hw->rrs_type & atl1e_rrs_ipv4)
1003 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1004
1005 if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1006 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1007
1008 if (hw->rrs_type & atl1e_rrs_ipv6)
1009 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1010
1011 if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1012 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1013
1014 if (hw->rrs_type != atl1e_rrs_disable)
1015 rxq_ctrl_data |=
1016 (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1017
1018 rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1019 RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1020
1021 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1022 }
1023
1024 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1025 {
1026 struct atl1e_hw *hw = &adapter->hw;
1027 u32 dma_ctrl_data = 0;
1028
1029 dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1030 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1031 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1032 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1033 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1034 dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1035 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1036 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1037 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1038 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1039
1040 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1041 }
1042
1043 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1044 {
1045 u32 value;
1046 struct atl1e_hw *hw = &adapter->hw;
1047 struct net_device *netdev = adapter->netdev;
1048
1049 /* Config MAC CTRL Register */
1050 value = MAC_CTRL_TX_EN |
1051 MAC_CTRL_RX_EN ;
1052
1053 if (FULL_DUPLEX == adapter->link_duplex)
1054 value |= MAC_CTRL_DUPLX;
1055
1056 value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1057 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1058 MAC_CTRL_SPEED_SHIFT);
1059 value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1060
1061 value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1062 value |= (((u32)adapter->hw.preamble_len &
1063 MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1064
1065 __atl1e_vlan_mode(netdev->features, &value);
1066
1067 value |= MAC_CTRL_BC_EN;
1068 if (netdev->flags & IFF_PROMISC)
1069 value |= MAC_CTRL_PROMIS_EN;
1070 if (netdev->flags & IFF_ALLMULTI)
1071 value |= MAC_CTRL_MC_ALL_EN;
1072 if (netdev->features & NETIF_F_RXALL)
1073 value |= MAC_CTRL_DBG;
1074 AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1075 }
1076
1077 /**
1078 * atl1e_configure - Configure Transmit&Receive Unit after Reset
1079 * @adapter: board private structure
1080 *
1081 * Configure the Tx /Rx unit of the MAC after a reset.
1082 */
1083 static int atl1e_configure(struct atl1e_adapter *adapter)
1084 {
1085 struct atl1e_hw *hw = &adapter->hw;
1086
1087 u32 intr_status_data = 0;
1088
1089 /* clear interrupt status */
1090 AT_WRITE_REG(hw, REG_ISR, ~0);
1091
1092 /* 1. set MAC Address */
1093 atl1e_hw_set_mac_addr(hw);
1094
1095 /* 2. Init the Multicast HASH table done by set_muti */
1096
1097 /* 3. Clear any WOL status */
1098 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1099
1100 /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1101 * TPD Ring/SMB/RXF0 Page CMBs, they use the same
1102 * High 32bits memory */
1103 atl1e_configure_des_ring(adapter);
1104
1105 /* 5. set Interrupt Moderator Timer */
1106 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1107 AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1108 AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1109 MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1110
1111 /* 6. rx/tx threshold to trig interrupt */
1112 AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1113 AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1114 AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1115 AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1116
1117 /* 7. set Interrupt Clear Timer */
1118 AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1119
1120 /* 8. set MTU */
1121 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1122 VLAN_HLEN + ETH_FCS_LEN);
1123
1124 /* 9. config TXQ early tx threshold */
1125 atl1e_configure_tx(adapter);
1126
1127 /* 10. config RXQ */
1128 atl1e_configure_rx(adapter);
1129
1130 /* 11. config DMA Engine */
1131 atl1e_configure_dma(adapter);
1132
1133 /* 12. smb timer to trig interrupt */
1134 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1135
1136 intr_status_data = AT_READ_REG(hw, REG_ISR);
1137 if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1138 netdev_err(adapter->netdev,
1139 "atl1e_configure failed, PCIE phy link down\n");
1140 return -1;
1141 }
1142
1143 AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1144 return 0;
1145 }
1146
1147 /**
1148 * atl1e_get_stats - Get System Network Statistics
1149 * @netdev: network interface device structure
1150 *
1151 * Returns the address of the device statistics structure.
1152 * The statistics are actually updated from the timer callback.
1153 */
1154 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1155 {
1156 struct atl1e_adapter *adapter = netdev_priv(netdev);
1157 struct atl1e_hw_stats *hw_stats = &adapter->hw_stats;
1158 struct net_device_stats *net_stats = &netdev->stats;
1159
1160 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1161 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1162 net_stats->multicast = hw_stats->rx_mcast;
1163 net_stats->collisions = hw_stats->tx_1_col +
1164 hw_stats->tx_2_col +
1165 hw_stats->tx_late_col +
1166 hw_stats->tx_abort_col;
1167
1168 net_stats->rx_errors = hw_stats->rx_frag +
1169 hw_stats->rx_fcs_err +
1170 hw_stats->rx_len_err +
1171 hw_stats->rx_sz_ov +
1172 hw_stats->rx_rrd_ov +
1173 hw_stats->rx_align_err +
1174 hw_stats->rx_rxf_ov;
1175
1176 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1177 net_stats->rx_length_errors = hw_stats->rx_len_err;
1178 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1179 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1180 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1181
1182 net_stats->tx_errors = hw_stats->tx_late_col +
1183 hw_stats->tx_abort_col +
1184 hw_stats->tx_underrun +
1185 hw_stats->tx_trunc;
1186
1187 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1188 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1189 net_stats->tx_window_errors = hw_stats->tx_late_col;
1190
1191 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1192 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1193
1194 return net_stats;
1195 }
1196
1197 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1198 {
1199 u16 hw_reg_addr = 0;
1200 unsigned long *stats_item = NULL;
1201
1202 /* update rx status */
1203 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1204 stats_item = &adapter->hw_stats.rx_ok;
1205 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1206 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1207 stats_item++;
1208 hw_reg_addr += 4;
1209 }
1210 /* update tx status */
1211 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1212 stats_item = &adapter->hw_stats.tx_ok;
1213 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1214 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1215 stats_item++;
1216 hw_reg_addr += 4;
1217 }
1218 }
1219
1220 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1221 {
1222 u16 phy_data;
1223
1224 spin_lock(&adapter->mdio_lock);
1225 atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1226 spin_unlock(&adapter->mdio_lock);
1227 }
1228
1229 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1230 {
1231 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1232 struct atl1e_tx_buffer *tx_buffer = NULL;
1233 u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1234 u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1235
1236 while (next_to_clean != hw_next_to_clean) {
1237 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1238 if (tx_buffer->dma) {
1239 if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1240 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1241 tx_buffer->length, PCI_DMA_TODEVICE);
1242 else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1243 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1244 tx_buffer->length, PCI_DMA_TODEVICE);
1245 tx_buffer->dma = 0;
1246 }
1247
1248 if (tx_buffer->skb) {
1249 dev_consume_skb_irq(tx_buffer->skb);
1250 tx_buffer->skb = NULL;
1251 }
1252
1253 if (++next_to_clean == tx_ring->count)
1254 next_to_clean = 0;
1255 }
1256
1257 atomic_set(&tx_ring->next_to_clean, next_to_clean);
1258
1259 if (netif_queue_stopped(adapter->netdev) &&
1260 netif_carrier_ok(adapter->netdev)) {
1261 netif_wake_queue(adapter->netdev);
1262 }
1263
1264 return true;
1265 }
1266
1267 /**
1268 * atl1e_intr - Interrupt Handler
1269 * @irq: interrupt number
1270 * @data: pointer to a network interface device structure
1271 */
1272 static irqreturn_t atl1e_intr(int irq, void *data)
1273 {
1274 struct net_device *netdev = data;
1275 struct atl1e_adapter *adapter = netdev_priv(netdev);
1276 struct atl1e_hw *hw = &adapter->hw;
1277 int max_ints = AT_MAX_INT_WORK;
1278 int handled = IRQ_NONE;
1279 u32 status;
1280
1281 do {
1282 status = AT_READ_REG(hw, REG_ISR);
1283 if ((status & IMR_NORMAL_MASK) == 0 ||
1284 (status & ISR_DIS_INT) != 0) {
1285 if (max_ints != AT_MAX_INT_WORK)
1286 handled = IRQ_HANDLED;
1287 break;
1288 }
1289 /* link event */
1290 if (status & ISR_GPHY)
1291 atl1e_clear_phy_int(adapter);
1292 /* Ack ISR */
1293 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1294
1295 handled = IRQ_HANDLED;
1296 /* check if PCIE PHY Link down */
1297 if (status & ISR_PHY_LINKDOWN) {
1298 netdev_err(adapter->netdev,
1299 "pcie phy linkdown %x\n", status);
1300 if (netif_running(adapter->netdev)) {
1301 /* reset MAC */
1302 atl1e_irq_reset(adapter);
1303 schedule_work(&adapter->reset_task);
1304 break;
1305 }
1306 }
1307
1308 /* check if DMA read/write error */
1309 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1310 netdev_err(adapter->netdev,
1311 "PCIE DMA RW error (status = 0x%x)\n",
1312 status);
1313 atl1e_irq_reset(adapter);
1314 schedule_work(&adapter->reset_task);
1315 break;
1316 }
1317
1318 if (status & ISR_SMB)
1319 atl1e_update_hw_stats(adapter);
1320
1321 /* link event */
1322 if (status & (ISR_GPHY | ISR_MANUAL)) {
1323 netdev->stats.tx_carrier_errors++;
1324 atl1e_link_chg_event(adapter);
1325 break;
1326 }
1327
1328 /* transmit event */
1329 if (status & ISR_TX_EVENT)
1330 atl1e_clean_tx_irq(adapter);
1331
1332 if (status & ISR_RX_EVENT) {
1333 /*
1334 * disable rx interrupts, without
1335 * the synchronize_irq bit
1336 */
1337 AT_WRITE_REG(hw, REG_IMR,
1338 IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1339 AT_WRITE_FLUSH(hw);
1340 if (likely(napi_schedule_prep(
1341 &adapter->napi)))
1342 __napi_schedule(&adapter->napi);
1343 }
1344 } while (--max_ints > 0);
1345 /* re-enable Interrupt*/
1346 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1347
1348 return handled;
1349 }
1350
1351 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1352 struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1353 {
1354 u8 *packet = (u8 *)(prrs + 1);
1355 struct iphdr *iph;
1356 u16 head_len = ETH_HLEN;
1357 u16 pkt_flags;
1358 u16 err_flags;
1359
1360 skb_checksum_none_assert(skb);
1361 pkt_flags = prrs->pkt_flag;
1362 err_flags = prrs->err_flag;
1363 if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1364 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1365 if (pkt_flags & RRS_IS_IPV4) {
1366 if (pkt_flags & RRS_IS_802_3)
1367 head_len += 8;
1368 iph = (struct iphdr *) (packet + head_len);
1369 if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1370 goto hw_xsum;
1371 }
1372 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1373 skb->ip_summed = CHECKSUM_UNNECESSARY;
1374 return;
1375 }
1376 }
1377
1378 hw_xsum :
1379 return;
1380 }
1381
1382 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1383 u8 que)
1384 {
1385 struct atl1e_rx_page_desc *rx_page_desc =
1386 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1387 u8 rx_using = rx_page_desc[que].rx_using;
1388
1389 return &(rx_page_desc[que].rx_page[rx_using]);
1390 }
1391
1392 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1393 int *work_done, int work_to_do)
1394 {
1395 struct net_device *netdev = adapter->netdev;
1396 struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1397 struct atl1e_rx_page_desc *rx_page_desc =
1398 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1399 struct sk_buff *skb = NULL;
1400 struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1401 u32 packet_size, write_offset;
1402 struct atl1e_recv_ret_status *prrs;
1403
1404 write_offset = *(rx_page->write_offset_addr);
1405 if (likely(rx_page->read_offset < write_offset)) {
1406 do {
1407 if (*work_done >= work_to_do)
1408 break;
1409 (*work_done)++;
1410 /* get new packet's rrs */
1411 prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1412 rx_page->read_offset);
1413 /* check sequence number */
1414 if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1415 netdev_err(netdev,
1416 "rx sequence number error (rx=%d) (expect=%d)\n",
1417 prrs->seq_num,
1418 rx_page_desc[que].rx_nxseq);
1419 rx_page_desc[que].rx_nxseq++;
1420 /* just for debug use */
1421 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1422 (((u32)prrs->seq_num) << 16) |
1423 rx_page_desc[que].rx_nxseq);
1424 goto fatal_err;
1425 }
1426 rx_page_desc[que].rx_nxseq++;
1427
1428 /* error packet */
1429 if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1430 !(netdev->features & NETIF_F_RXALL)) {
1431 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1432 RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1433 RRS_ERR_TRUNC)) {
1434 /* hardware error, discard this packet*/
1435 netdev_err(netdev,
1436 "rx packet desc error %x\n",
1437 *((u32 *)prrs + 1));
1438 goto skip_pkt;
1439 }
1440 }
1441
1442 packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1443 RRS_PKT_SIZE_MASK);
1444 if (likely(!(netdev->features & NETIF_F_RXFCS)))
1445 packet_size -= 4; /* CRC */
1446
1447 skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1448 if (skb == NULL)
1449 goto skip_pkt;
1450
1451 memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1452 skb_put(skb, packet_size);
1453 skb->protocol = eth_type_trans(skb, netdev);
1454 atl1e_rx_checksum(adapter, skb, prrs);
1455
1456 if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1457 u16 vlan_tag = (prrs->vtag >> 4) |
1458 ((prrs->vtag & 7) << 13) |
1459 ((prrs->vtag & 8) << 9);
1460 netdev_dbg(netdev,
1461 "RXD VLAN TAG<RRD>=0x%04x\n",
1462 prrs->vtag);
1463 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1464 }
1465 napi_gro_receive(&adapter->napi, skb);
1466
1467 skip_pkt:
1468 /* skip current packet whether it's ok or not. */
1469 rx_page->read_offset +=
1470 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1471 RRS_PKT_SIZE_MASK) +
1472 sizeof(struct atl1e_recv_ret_status) + 31) &
1473 0xFFFFFFE0);
1474
1475 if (rx_page->read_offset >= rx_ring->page_size) {
1476 /* mark this page clean */
1477 u16 reg_addr;
1478 u8 rx_using;
1479
1480 rx_page->read_offset =
1481 *(rx_page->write_offset_addr) = 0;
1482 rx_using = rx_page_desc[que].rx_using;
1483 reg_addr =
1484 atl1e_rx_page_vld_regs[que][rx_using];
1485 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1486 rx_page_desc[que].rx_using ^= 1;
1487 rx_page = atl1e_get_rx_page(adapter, que);
1488 }
1489 write_offset = *(rx_page->write_offset_addr);
1490 } while (rx_page->read_offset < write_offset);
1491 }
1492
1493 return;
1494
1495 fatal_err:
1496 if (!test_bit(__AT_DOWN, &adapter->flags))
1497 schedule_work(&adapter->reset_task);
1498 }
1499
1500 /**
1501 * atl1e_clean - NAPI Rx polling callback
1502 */
1503 static int atl1e_clean(struct napi_struct *napi, int budget)
1504 {
1505 struct atl1e_adapter *adapter =
1506 container_of(napi, struct atl1e_adapter, napi);
1507 u32 imr_data;
1508 int work_done = 0;
1509
1510 /* Keep link state information with original netdev */
1511 if (!netif_carrier_ok(adapter->netdev))
1512 goto quit_polling;
1513
1514 atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1515
1516 /* If no Tx and not enough Rx work done, exit the polling mode */
1517 if (work_done < budget) {
1518 quit_polling:
1519 napi_complete_done(napi, work_done);
1520 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1521 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1522 /* test debug */
1523 if (test_bit(__AT_DOWN, &adapter->flags)) {
1524 atomic_dec(&adapter->irq_sem);
1525 netdev_err(adapter->netdev,
1526 "atl1e_clean is called when AT_DOWN\n");
1527 }
1528 /* reenable RX intr */
1529 /*atl1e_irq_enable(adapter); */
1530
1531 }
1532 return work_done;
1533 }
1534
1535 #ifdef CONFIG_NET_POLL_CONTROLLER
1536
1537 /*
1538 * Polling 'interrupt' - used by things like netconsole to send skbs
1539 * without having to re-enable interrupts. It's not called while
1540 * the interrupt routine is executing.
1541 */
1542 static void atl1e_netpoll(struct net_device *netdev)
1543 {
1544 struct atl1e_adapter *adapter = netdev_priv(netdev);
1545
1546 disable_irq(adapter->pdev->irq);
1547 atl1e_intr(adapter->pdev->irq, netdev);
1548 enable_irq(adapter->pdev->irq);
1549 }
1550 #endif
1551
1552 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1553 {
1554 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1555 u16 next_to_use = 0;
1556 u16 next_to_clean = 0;
1557
1558 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1559 next_to_use = tx_ring->next_to_use;
1560
1561 return (u16)(next_to_clean > next_to_use) ?
1562 (next_to_clean - next_to_use - 1) :
1563 (tx_ring->count + next_to_clean - next_to_use - 1);
1564 }
1565
1566 /*
1567 * get next usable tpd
1568 * Note: should call atl1e_tdp_avail to make sure
1569 * there is enough tpd to use
1570 */
1571 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1572 {
1573 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1574 u16 next_to_use = 0;
1575
1576 next_to_use = tx_ring->next_to_use;
1577 if (++tx_ring->next_to_use == tx_ring->count)
1578 tx_ring->next_to_use = 0;
1579
1580 memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1581 return &tx_ring->desc[next_to_use];
1582 }
1583
1584 static struct atl1e_tx_buffer *
1585 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1586 {
1587 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1588
1589 return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1590 }
1591
1592 /* Calculate the transmit packet descript needed*/
1593 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1594 {
1595 int i = 0;
1596 u16 tpd_req = 1;
1597 u16 fg_size = 0;
1598 u16 proto_hdr_len = 0;
1599
1600 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1601 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1602 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1603 }
1604
1605 if (skb_is_gso(skb)) {
1606 if (skb->protocol == htons(ETH_P_IP) ||
1607 (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1608 proto_hdr_len = skb_transport_offset(skb) +
1609 tcp_hdrlen(skb);
1610 if (proto_hdr_len < skb_headlen(skb)) {
1611 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1612 MAX_TX_BUF_LEN - 1) >>
1613 MAX_TX_BUF_SHIFT);
1614 }
1615 }
1616
1617 }
1618 return tpd_req;
1619 }
1620
1621 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1622 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1623 {
1624 unsigned short offload_type;
1625 u8 hdr_len;
1626 u32 real_len;
1627
1628 if (skb_is_gso(skb)) {
1629 int err;
1630
1631 err = skb_cow_head(skb, 0);
1632 if (err < 0)
1633 return err;
1634
1635 offload_type = skb_shinfo(skb)->gso_type;
1636
1637 if (offload_type & SKB_GSO_TCPV4) {
1638 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1639 + ntohs(ip_hdr(skb)->tot_len));
1640
1641 if (real_len < skb->len)
1642 pskb_trim(skb, real_len);
1643
1644 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1645 if (unlikely(skb->len == hdr_len)) {
1646 /* only xsum need */
1647 netdev_warn(adapter->netdev,
1648 "IPV4 tso with zero data??\n");
1649 goto check_sum;
1650 } else {
1651 ip_hdr(skb)->check = 0;
1652 ip_hdr(skb)->tot_len = 0;
1653 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1654 ip_hdr(skb)->saddr,
1655 ip_hdr(skb)->daddr,
1656 0, IPPROTO_TCP, 0);
1657 tpd->word3 |= (ip_hdr(skb)->ihl &
1658 TDP_V4_IPHL_MASK) <<
1659 TPD_V4_IPHL_SHIFT;
1660 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1661 TPD_TCPHDRLEN_MASK) <<
1662 TPD_TCPHDRLEN_SHIFT;
1663 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1664 TPD_MSS_MASK) << TPD_MSS_SHIFT;
1665 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1666 }
1667 return 0;
1668 }
1669 }
1670
1671 check_sum:
1672 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1673 u8 css, cso;
1674
1675 cso = skb_checksum_start_offset(skb);
1676 if (unlikely(cso & 0x1)) {
1677 netdev_err(adapter->netdev,
1678 "payload offset should not ant event number\n");
1679 return -1;
1680 } else {
1681 css = cso + skb->csum_offset;
1682 tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1683 TPD_PLOADOFFSET_SHIFT;
1684 tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1685 TPD_CCSUMOFFSET_SHIFT;
1686 tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1687 }
1688 }
1689
1690 return 0;
1691 }
1692
1693 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1694 struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1695 {
1696 struct atl1e_tpd_desc *use_tpd = NULL;
1697 struct atl1e_tx_buffer *tx_buffer = NULL;
1698 u16 buf_len = skb_headlen(skb);
1699 u16 map_len = 0;
1700 u16 mapped_len = 0;
1701 u16 hdr_len = 0;
1702 u16 nr_frags;
1703 u16 f;
1704 int segment;
1705 int ring_start = adapter->tx_ring.next_to_use;
1706 int ring_end;
1707
1708 nr_frags = skb_shinfo(skb)->nr_frags;
1709 segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1710 if (segment) {
1711 /* TSO */
1712 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1713 use_tpd = tpd;
1714
1715 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1716 tx_buffer->length = map_len;
1717 tx_buffer->dma = pci_map_single(adapter->pdev,
1718 skb->data, hdr_len, PCI_DMA_TODEVICE);
1719 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1720 return -ENOSPC;
1721
1722 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1723 mapped_len += map_len;
1724 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1725 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1726 ((cpu_to_le32(tx_buffer->length) &
1727 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1728 }
1729
1730 while (mapped_len < buf_len) {
1731 /* mapped_len == 0, means we should use the first tpd,
1732 which is given by caller */
1733 if (mapped_len == 0) {
1734 use_tpd = tpd;
1735 } else {
1736 use_tpd = atl1e_get_tpd(adapter);
1737 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1738 }
1739 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1740 tx_buffer->skb = NULL;
1741
1742 tx_buffer->length = map_len =
1743 ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1744 MAX_TX_BUF_LEN : (buf_len - mapped_len);
1745 tx_buffer->dma =
1746 pci_map_single(adapter->pdev, skb->data + mapped_len,
1747 map_len, PCI_DMA_TODEVICE);
1748
1749 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1750 /* We need to unwind the mappings we've done */
1751 ring_end = adapter->tx_ring.next_to_use;
1752 adapter->tx_ring.next_to_use = ring_start;
1753 while (adapter->tx_ring.next_to_use != ring_end) {
1754 tpd = atl1e_get_tpd(adapter);
1755 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1756 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1757 tx_buffer->length, PCI_DMA_TODEVICE);
1758 }
1759 /* Reset the tx rings next pointer */
1760 adapter->tx_ring.next_to_use = ring_start;
1761 return -ENOSPC;
1762 }
1763
1764 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1765 mapped_len += map_len;
1766 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1767 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1768 ((cpu_to_le32(tx_buffer->length) &
1769 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1770 }
1771
1772 for (f = 0; f < nr_frags; f++) {
1773 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1774 u16 i;
1775 u16 seg_num;
1776
1777 buf_len = skb_frag_size(frag);
1778
1779 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1780 for (i = 0; i < seg_num; i++) {
1781 use_tpd = atl1e_get_tpd(adapter);
1782 memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1783
1784 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1785 BUG_ON(tx_buffer->skb);
1786
1787 tx_buffer->skb = NULL;
1788 tx_buffer->length =
1789 (buf_len > MAX_TX_BUF_LEN) ?
1790 MAX_TX_BUF_LEN : buf_len;
1791 buf_len -= tx_buffer->length;
1792
1793 tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1794 frag,
1795 (i * MAX_TX_BUF_LEN),
1796 tx_buffer->length,
1797 DMA_TO_DEVICE);
1798
1799 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1800 /* We need to unwind the mappings we've done */
1801 ring_end = adapter->tx_ring.next_to_use;
1802 adapter->tx_ring.next_to_use = ring_start;
1803 while (adapter->tx_ring.next_to_use != ring_end) {
1804 tpd = atl1e_get_tpd(adapter);
1805 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1806 dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1807 tx_buffer->length, DMA_TO_DEVICE);
1808 }
1809
1810 /* Reset the ring next to use pointer */
1811 adapter->tx_ring.next_to_use = ring_start;
1812 return -ENOSPC;
1813 }
1814
1815 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1816 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1817 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1818 ((cpu_to_le32(tx_buffer->length) &
1819 TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1820 }
1821 }
1822
1823 if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1824 /* note this one is a tcp header */
1825 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1826 /* The last tpd */
1827
1828 use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1829 /* The last buffer info contain the skb address,
1830 so it will be free after unmap */
1831 tx_buffer->skb = skb;
1832 return 0;
1833 }
1834
1835 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1836 struct atl1e_tpd_desc *tpd)
1837 {
1838 struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1839 /* Force memory writes to complete before letting h/w
1840 * know there are new descriptors to fetch. (Only
1841 * applicable for weak-ordered memory model archs,
1842 * such as IA-64). */
1843 wmb();
1844 AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1845 }
1846
1847 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1848 struct net_device *netdev)
1849 {
1850 struct atl1e_adapter *adapter = netdev_priv(netdev);
1851 u16 tpd_req = 1;
1852 struct atl1e_tpd_desc *tpd;
1853
1854 if (test_bit(__AT_DOWN, &adapter->flags)) {
1855 dev_kfree_skb_any(skb);
1856 return NETDEV_TX_OK;
1857 }
1858
1859 if (unlikely(skb->len <= 0)) {
1860 dev_kfree_skb_any(skb);
1861 return NETDEV_TX_OK;
1862 }
1863 tpd_req = atl1e_cal_tdp_req(skb);
1864
1865 if (atl1e_tpd_avail(adapter) < tpd_req) {
1866 /* no enough descriptor, just stop queue */
1867 netif_stop_queue(netdev);
1868 return NETDEV_TX_BUSY;
1869 }
1870
1871 tpd = atl1e_get_tpd(adapter);
1872
1873 if (skb_vlan_tag_present(skb)) {
1874 u16 vlan_tag = skb_vlan_tag_get(skb);
1875 u16 atl1e_vlan_tag;
1876
1877 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1878 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1879 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1880 TPD_VLAN_SHIFT;
1881 }
1882
1883 if (skb->protocol == htons(ETH_P_8021Q))
1884 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1885
1886 if (skb_network_offset(skb) != ETH_HLEN)
1887 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1888
1889 /* do TSO and check sum */
1890 if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1891 dev_kfree_skb_any(skb);
1892 return NETDEV_TX_OK;
1893 }
1894
1895 if (atl1e_tx_map(adapter, skb, tpd)) {
1896 dev_kfree_skb_any(skb);
1897 goto out;
1898 }
1899
1900 atl1e_tx_queue(adapter, tpd_req, tpd);
1901 out:
1902 return NETDEV_TX_OK;
1903 }
1904
1905 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1906 {
1907 struct net_device *netdev = adapter->netdev;
1908
1909 free_irq(adapter->pdev->irq, netdev);
1910 }
1911
1912 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1913 {
1914 struct pci_dev *pdev = adapter->pdev;
1915 struct net_device *netdev = adapter->netdev;
1916 int err = 0;
1917
1918 err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1919 netdev);
1920 if (err) {
1921 netdev_dbg(adapter->netdev,
1922 "Unable to allocate interrupt Error: %d\n", err);
1923 return err;
1924 }
1925 netdev_dbg(netdev, "atl1e_request_irq OK\n");
1926 return err;
1927 }
1928
1929 int atl1e_up(struct atl1e_adapter *adapter)
1930 {
1931 struct net_device *netdev = adapter->netdev;
1932 int err = 0;
1933 u32 val;
1934
1935 /* hardware has been reset, we need to reload some things */
1936 err = atl1e_init_hw(&adapter->hw);
1937 if (err) {
1938 err = -EIO;
1939 return err;
1940 }
1941 atl1e_init_ring_ptrs(adapter);
1942 atl1e_set_multi(netdev);
1943 atl1e_restore_vlan(adapter);
1944
1945 if (atl1e_configure(adapter)) {
1946 err = -EIO;
1947 goto err_up;
1948 }
1949
1950 clear_bit(__AT_DOWN, &adapter->flags);
1951 napi_enable(&adapter->napi);
1952 atl1e_irq_enable(adapter);
1953 val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1954 AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1955 val | MASTER_CTRL_MANUAL_INT);
1956
1957 err_up:
1958 return err;
1959 }
1960
1961 void atl1e_down(struct atl1e_adapter *adapter)
1962 {
1963 struct net_device *netdev = adapter->netdev;
1964
1965 /* signal that we're down so the interrupt handler does not
1966 * reschedule our watchdog timer */
1967 set_bit(__AT_DOWN, &adapter->flags);
1968
1969 netif_stop_queue(netdev);
1970
1971 /* reset MAC to disable all RX/TX */
1972 atl1e_reset_hw(&adapter->hw);
1973 msleep(1);
1974
1975 napi_disable(&adapter->napi);
1976 atl1e_del_timer(adapter);
1977 atl1e_irq_disable(adapter);
1978
1979 netif_carrier_off(netdev);
1980 adapter->link_speed = SPEED_0;
1981 adapter->link_duplex = -1;
1982 atl1e_clean_tx_ring(adapter);
1983 atl1e_clean_rx_ring(adapter);
1984 }
1985
1986 /**
1987 * atl1e_open - Called when a network interface is made active
1988 * @netdev: network interface device structure
1989 *
1990 * Returns 0 on success, negative value on failure
1991 *
1992 * The open entry point is called when a network interface is made
1993 * active by the system (IFF_UP). At this point all resources needed
1994 * for transmit and receive operations are allocated, the interrupt
1995 * handler is registered with the OS, the watchdog timer is started,
1996 * and the stack is notified that the interface is ready.
1997 */
1998 static int atl1e_open(struct net_device *netdev)
1999 {
2000 struct atl1e_adapter *adapter = netdev_priv(netdev);
2001 int err;
2002
2003 /* disallow open during test */
2004 if (test_bit(__AT_TESTING, &adapter->flags))
2005 return -EBUSY;
2006
2007 /* allocate rx/tx dma buffer & descriptors */
2008 atl1e_init_ring_resources(adapter);
2009 err = atl1e_setup_ring_resources(adapter);
2010 if (unlikely(err))
2011 return err;
2012
2013 err = atl1e_request_irq(adapter);
2014 if (unlikely(err))
2015 goto err_req_irq;
2016
2017 err = atl1e_up(adapter);
2018 if (unlikely(err))
2019 goto err_up;
2020
2021 return 0;
2022
2023 err_up:
2024 atl1e_free_irq(adapter);
2025 err_req_irq:
2026 atl1e_free_ring_resources(adapter);
2027 atl1e_reset_hw(&adapter->hw);
2028
2029 return err;
2030 }
2031
2032 /**
2033 * atl1e_close - Disables a network interface
2034 * @netdev: network interface device structure
2035 *
2036 * Returns 0, this is not allowed to fail
2037 *
2038 * The close entry point is called when an interface is de-activated
2039 * by the OS. The hardware is still under the drivers control, but
2040 * needs to be disabled. A global MAC reset is issued to stop the
2041 * hardware, and all transmit and receive resources are freed.
2042 */
2043 static int atl1e_close(struct net_device *netdev)
2044 {
2045 struct atl1e_adapter *adapter = netdev_priv(netdev);
2046
2047 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2048 atl1e_down(adapter);
2049 atl1e_free_irq(adapter);
2050 atl1e_free_ring_resources(adapter);
2051
2052 return 0;
2053 }
2054
2055 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2056 {
2057 struct net_device *netdev = pci_get_drvdata(pdev);
2058 struct atl1e_adapter *adapter = netdev_priv(netdev);
2059 struct atl1e_hw *hw = &adapter->hw;
2060 u32 ctrl = 0;
2061 u32 mac_ctrl_data = 0;
2062 u32 wol_ctrl_data = 0;
2063 u16 mii_advertise_data = 0;
2064 u16 mii_bmsr_data = 0;
2065 u16 mii_intr_status_data = 0;
2066 u32 wufc = adapter->wol;
2067 u32 i;
2068 #ifdef CONFIG_PM
2069 int retval = 0;
2070 #endif
2071
2072 if (netif_running(netdev)) {
2073 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2074 atl1e_down(adapter);
2075 }
2076 netif_device_detach(netdev);
2077
2078 #ifdef CONFIG_PM
2079 retval = pci_save_state(pdev);
2080 if (retval)
2081 return retval;
2082 #endif
2083
2084 if (wufc) {
2085 /* get link status */
2086 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2087 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2088
2089 mii_advertise_data = ADVERTISE_10HALF;
2090
2091 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2092 (atl1e_write_phy_reg(hw,
2093 MII_ADVERTISE, mii_advertise_data) != 0) ||
2094 (atl1e_phy_commit(hw)) != 0) {
2095 netdev_dbg(adapter->netdev, "set phy register failed\n");
2096 goto wol_dis;
2097 }
2098
2099 hw->phy_configured = false; /* re-init PHY when resume */
2100
2101 /* turn on magic packet wol */
2102 if (wufc & AT_WUFC_MAG)
2103 wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2104
2105 if (wufc & AT_WUFC_LNKC) {
2106 /* if orignal link status is link, just wait for retrive link */
2107 if (mii_bmsr_data & BMSR_LSTATUS) {
2108 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2109 msleep(100);
2110 atl1e_read_phy_reg(hw, MII_BMSR,
2111 &mii_bmsr_data);
2112 if (mii_bmsr_data & BMSR_LSTATUS)
2113 break;
2114 }
2115
2116 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2117 netdev_dbg(adapter->netdev,
2118 "Link may change when suspend\n");
2119 }
2120 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2121 /* only link up can wake up */
2122 if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2123 netdev_dbg(adapter->netdev,
2124 "read write phy register failed\n");
2125 goto wol_dis;
2126 }
2127 }
2128 /* clear phy interrupt */
2129 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2130 /* Config MAC Ctrl register */
2131 mac_ctrl_data = MAC_CTRL_RX_EN;
2132 /* set to 10/100M halt duplex */
2133 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2134 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2135 MAC_CTRL_PRMLEN_MASK) <<
2136 MAC_CTRL_PRMLEN_SHIFT);
2137
2138 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2139
2140 /* magic packet maybe Broadcast&multicast&Unicast frame */
2141 if (wufc & AT_WUFC_MAG)
2142 mac_ctrl_data |= MAC_CTRL_BC_EN;
2143
2144 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2145 mac_ctrl_data);
2146
2147 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2148 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2149 /* pcie patch */
2150 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2151 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2152 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2153 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2154 goto suspend_exit;
2155 }
2156 wol_dis:
2157
2158 /* WOL disabled */
2159 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2160
2161 /* pcie patch */
2162 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2163 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2164 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2165
2166 atl1e_force_ps(hw);
2167 hw->phy_configured = false; /* re-init PHY when resume */
2168
2169 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2170
2171 suspend_exit:
2172
2173 if (netif_running(netdev))
2174 atl1e_free_irq(adapter);
2175
2176 pci_disable_device(pdev);
2177
2178 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2179
2180 return 0;
2181 }
2182
2183 #ifdef CONFIG_PM
2184 static int atl1e_resume(struct pci_dev *pdev)
2185 {
2186 struct net_device *netdev = pci_get_drvdata(pdev);
2187 struct atl1e_adapter *adapter = netdev_priv(netdev);
2188 u32 err;
2189
2190 pci_set_power_state(pdev, PCI_D0);
2191 pci_restore_state(pdev);
2192
2193 err = pci_enable_device(pdev);
2194 if (err) {
2195 netdev_err(adapter->netdev,
2196 "Cannot enable PCI device from suspend\n");
2197 return err;
2198 }
2199
2200 pci_set_master(pdev);
2201
2202 AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2203
2204 pci_enable_wake(pdev, PCI_D3hot, 0);
2205 pci_enable_wake(pdev, PCI_D3cold, 0);
2206
2207 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2208
2209 if (netif_running(netdev)) {
2210 err = atl1e_request_irq(adapter);
2211 if (err)
2212 return err;
2213 }
2214
2215 atl1e_reset_hw(&adapter->hw);
2216
2217 if (netif_running(netdev))
2218 atl1e_up(adapter);
2219
2220 netif_device_attach(netdev);
2221
2222 return 0;
2223 }
2224 #endif
2225
2226 static void atl1e_shutdown(struct pci_dev *pdev)
2227 {
2228 atl1e_suspend(pdev, PMSG_SUSPEND);
2229 }
2230
2231 static const struct net_device_ops atl1e_netdev_ops = {
2232 .ndo_open = atl1e_open,
2233 .ndo_stop = atl1e_close,
2234 .ndo_start_xmit = atl1e_xmit_frame,
2235 .ndo_get_stats = atl1e_get_stats,
2236 .ndo_set_rx_mode = atl1e_set_multi,
2237 .ndo_validate_addr = eth_validate_addr,
2238 .ndo_set_mac_address = atl1e_set_mac_addr,
2239 .ndo_fix_features = atl1e_fix_features,
2240 .ndo_set_features = atl1e_set_features,
2241 .ndo_change_mtu = atl1e_change_mtu,
2242 .ndo_do_ioctl = atl1e_ioctl,
2243 .ndo_tx_timeout = atl1e_tx_timeout,
2244 #ifdef CONFIG_NET_POLL_CONTROLLER
2245 .ndo_poll_controller = atl1e_netpoll,
2246 #endif
2247
2248 };
2249
2250 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2251 {
2252 SET_NETDEV_DEV(netdev, &pdev->dev);
2253 pci_set_drvdata(pdev, netdev);
2254
2255 netdev->netdev_ops = &atl1e_netdev_ops;
2256
2257 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2258 /* MTU range: 42 - 8170 */
2259 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2260 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2261 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2262 atl1e_set_ethtool_ops(netdev);
2263
2264 netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2265 NETIF_F_HW_VLAN_CTAG_RX;
2266 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2267 /* not enabled by default */
2268 netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2269 return 0;
2270 }
2271
2272 /**
2273 * atl1e_probe - Device Initialization Routine
2274 * @pdev: PCI device information struct
2275 * @ent: entry in atl1e_pci_tbl
2276 *
2277 * Returns 0 on success, negative on failure
2278 *
2279 * atl1e_probe initializes an adapter identified by a pci_dev structure.
2280 * The OS initialization, configuring of the adapter private structure,
2281 * and a hardware reset occur.
2282 */
2283 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2284 {
2285 struct net_device *netdev;
2286 struct atl1e_adapter *adapter = NULL;
2287 static int cards_found;
2288
2289 int err = 0;
2290
2291 err = pci_enable_device(pdev);
2292 if (err) {
2293 dev_err(&pdev->dev, "cannot enable PCI device\n");
2294 return err;
2295 }
2296
2297 /*
2298 * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2299 * shared register for the high 32 bits, so only a single, aligned,
2300 * 4 GB physical address range can be used at a time.
2301 *
2302 * Supporting 64-bit DMA on this hardware is more trouble than it's
2303 * worth. It is far easier to limit to 32-bit DMA than update
2304 * various kernel subsystems to support the mechanics required by a
2305 * fixed-high-32-bit system.
2306 */
2307 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2308 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2309 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2310 goto err_dma;
2311 }
2312
2313 err = pci_request_regions(pdev, atl1e_driver_name);
2314 if (err) {
2315 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2316 goto err_pci_reg;
2317 }
2318
2319 pci_set_master(pdev);
2320
2321 netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2322 if (netdev == NULL) {
2323 err = -ENOMEM;
2324 goto err_alloc_etherdev;
2325 }
2326
2327 err = atl1e_init_netdev(netdev, pdev);
2328 if (err) {
2329 netdev_err(netdev, "init netdevice failed\n");
2330 goto err_init_netdev;
2331 }
2332 adapter = netdev_priv(netdev);
2333 adapter->bd_number = cards_found;
2334 adapter->netdev = netdev;
2335 adapter->pdev = pdev;
2336 adapter->hw.adapter = adapter;
2337 adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2338 if (!adapter->hw.hw_addr) {
2339 err = -EIO;
2340 netdev_err(netdev, "cannot map device registers\n");
2341 goto err_ioremap;
2342 }
2343
2344 /* init mii data */
2345 adapter->mii.dev = netdev;
2346 adapter->mii.mdio_read = atl1e_mdio_read;
2347 adapter->mii.mdio_write = atl1e_mdio_write;
2348 adapter->mii.phy_id_mask = 0x1f;
2349 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2350
2351 netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2352
2353 timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);
2354
2355 /* get user settings */
2356 atl1e_check_options(adapter);
2357 /*
2358 * Mark all PCI regions associated with PCI device
2359 * pdev as being reserved by owner atl1e_driver_name
2360 * Enables bus-mastering on the device and calls
2361 * pcibios_set_master to do the needed arch specific settings
2362 */
2363 atl1e_setup_pcicmd(pdev);
2364 /* setup the private structure */
2365 err = atl1e_sw_init(adapter);
2366 if (err) {
2367 netdev_err(netdev, "net device private data init failed\n");
2368 goto err_sw_init;
2369 }
2370
2371 /* Init GPHY as early as possible due to power saving issue */
2372 atl1e_phy_init(&adapter->hw);
2373 /* reset the controller to
2374 * put the device in a known good starting state */
2375 err = atl1e_reset_hw(&adapter->hw);
2376 if (err) {
2377 err = -EIO;
2378 goto err_reset;
2379 }
2380
2381 if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2382 err = -EIO;
2383 netdev_err(netdev, "get mac address failed\n");
2384 goto err_eeprom;
2385 }
2386
2387 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2388 netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2389
2390 INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2391 INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2392 netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2393 err = register_netdev(netdev);
2394 if (err) {
2395 netdev_err(netdev, "register netdevice failed\n");
2396 goto err_register;
2397 }
2398
2399 /* assume we have no link for now */
2400 netif_stop_queue(netdev);
2401 netif_carrier_off(netdev);
2402
2403 cards_found++;
2404
2405 return 0;
2406
2407 err_reset:
2408 err_register:
2409 err_sw_init:
2410 err_eeprom:
2411 pci_iounmap(pdev, adapter->hw.hw_addr);
2412 err_init_netdev:
2413 err_ioremap:
2414 free_netdev(netdev);
2415 err_alloc_etherdev:
2416 pci_release_regions(pdev);
2417 err_pci_reg:
2418 err_dma:
2419 pci_disable_device(pdev);
2420 return err;
2421 }
2422
2423 /**
2424 * atl1e_remove - Device Removal Routine
2425 * @pdev: PCI device information struct
2426 *
2427 * atl1e_remove is called by the PCI subsystem to alert the driver
2428 * that it should release a PCI device. The could be caused by a
2429 * Hot-Plug event, or because the driver is going to be removed from
2430 * memory.
2431 */
2432 static void atl1e_remove(struct pci_dev *pdev)
2433 {
2434 struct net_device *netdev = pci_get_drvdata(pdev);
2435 struct atl1e_adapter *adapter = netdev_priv(netdev);
2436
2437 /*
2438 * flush_scheduled work may reschedule our watchdog task, so
2439 * explicitly disable watchdog tasks from being rescheduled
2440 */
2441 set_bit(__AT_DOWN, &adapter->flags);
2442
2443 atl1e_del_timer(adapter);
2444 atl1e_cancel_work(adapter);
2445
2446 unregister_netdev(netdev);
2447 atl1e_free_ring_resources(adapter);
2448 atl1e_force_ps(&adapter->hw);
2449 pci_iounmap(pdev, adapter->hw.hw_addr);
2450 pci_release_regions(pdev);
2451 free_netdev(netdev);
2452 pci_disable_device(pdev);
2453 }
2454
2455 /**
2456 * atl1e_io_error_detected - called when PCI error is detected
2457 * @pdev: Pointer to PCI device
2458 * @state: The current pci connection state
2459 *
2460 * This function is called after a PCI bus error affecting
2461 * this device has been detected.
2462 */
2463 static pci_ers_result_t
2464 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2465 {
2466 struct net_device *netdev = pci_get_drvdata(pdev);
2467 struct atl1e_adapter *adapter = netdev_priv(netdev);
2468
2469 netif_device_detach(netdev);
2470
2471 if (state == pci_channel_io_perm_failure)
2472 return PCI_ERS_RESULT_DISCONNECT;
2473
2474 if (netif_running(netdev))
2475 atl1e_down(adapter);
2476
2477 pci_disable_device(pdev);
2478
2479 /* Request a slot slot reset. */
2480 return PCI_ERS_RESULT_NEED_RESET;
2481 }
2482
2483 /**
2484 * atl1e_io_slot_reset - called after the pci bus has been reset.
2485 * @pdev: Pointer to PCI device
2486 *
2487 * Restart the card from scratch, as if from a cold-boot. Implementation
2488 * resembles the first-half of the e1000_resume routine.
2489 */
2490 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2491 {
2492 struct net_device *netdev = pci_get_drvdata(pdev);
2493 struct atl1e_adapter *adapter = netdev_priv(netdev);
2494
2495 if (pci_enable_device(pdev)) {
2496 netdev_err(adapter->netdev,
2497 "Cannot re-enable PCI device after reset\n");
2498 return PCI_ERS_RESULT_DISCONNECT;
2499 }
2500 pci_set_master(pdev);
2501
2502 pci_enable_wake(pdev, PCI_D3hot, 0);
2503 pci_enable_wake(pdev, PCI_D3cold, 0);
2504
2505 atl1e_reset_hw(&adapter->hw);
2506
2507 return PCI_ERS_RESULT_RECOVERED;
2508 }
2509
2510 /**
2511 * atl1e_io_resume - called when traffic can start flowing again.
2512 * @pdev: Pointer to PCI device
2513 *
2514 * This callback is called when the error recovery driver tells us that
2515 * its OK to resume normal operation. Implementation resembles the
2516 * second-half of the atl1e_resume routine.
2517 */
2518 static void atl1e_io_resume(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 (netif_running(netdev)) {
2524 if (atl1e_up(adapter)) {
2525 netdev_err(adapter->netdev,
2526 "can't bring device back up after reset\n");
2527 return;
2528 }
2529 }
2530
2531 netif_device_attach(netdev);
2532 }
2533
2534 static const struct pci_error_handlers atl1e_err_handler = {
2535 .error_detected = atl1e_io_error_detected,
2536 .slot_reset = atl1e_io_slot_reset,
2537 .resume = atl1e_io_resume,
2538 };
2539
2540 static struct pci_driver atl1e_driver = {
2541 .name = atl1e_driver_name,
2542 .id_table = atl1e_pci_tbl,
2543 .probe = atl1e_probe,
2544 .remove = atl1e_remove,
2545 /* Power Management Hooks */
2546 #ifdef CONFIG_PM
2547 .suspend = atl1e_suspend,
2548 .resume = atl1e_resume,
2549 #endif
2550 .shutdown = atl1e_shutdown,
2551 .err_handler = &atl1e_err_handler
2552 };
2553
2554 module_pci_driver(atl1e_driver);
Linux with added FPC-III support