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Merge commit 'refs/merge-requests/1' of git://gitorious.org/linux-on-wince-htc/linux_...
[htc-linux.git] / drivers / net / atl1c / atl1c_main.c
blobbe00ee973546e436b0dddf5284f80924fdc7f597
1 /*
2 * Copyright(c) 2008 - 2009 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 "atl1c.h"
23
24 #define ATL1C_DRV_VERSION "1.0.0.1-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27 #define PCI_DEVICE_ID_ATTANSIC_L2C 0x1062
28 #define PCI_DEVICE_ID_ATTANSIC_L1C 0x1063
29 /*
30 * atl1c_pci_tbl - PCI Device ID Table
31 *
32 * Wildcard entries (PCI_ANY_ID) should come last
33 * Last entry must be all 0s
34 *
35 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
36 * Class, Class Mask, private data (not used) }
37 */
38 static struct pci_device_id atl1c_pci_tbl[] = {
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
41 /* required last entry */
42 { 0 }
43 };
44 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
45
46 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(ATL1C_DRV_VERSION);
50
51 static int atl1c_stop_mac(struct atl1c_hw *hw);
52 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
53 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
54 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
55 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
56 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
57 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
58 int *work_done, int work_to_do);
59
60 static const u16 atl1c_pay_load_size[] = {
61 128, 256, 512, 1024, 2048, 4096,
62 };
63
64 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
65 {
66 REG_MB_RFD0_PROD_IDX,
67 REG_MB_RFD1_PROD_IDX,
68 REG_MB_RFD2_PROD_IDX,
69 REG_MB_RFD3_PROD_IDX
70 };
71
72 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
73 {
74 REG_RFD0_HEAD_ADDR_LO,
75 REG_RFD1_HEAD_ADDR_LO,
76 REG_RFD2_HEAD_ADDR_LO,
77 REG_RFD3_HEAD_ADDR_LO
78 };
79
80 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
81 {
82 REG_RRD0_HEAD_ADDR_LO,
83 REG_RRD1_HEAD_ADDR_LO,
84 REG_RRD2_HEAD_ADDR_LO,
85 REG_RRD3_HEAD_ADDR_LO
86 };
87
88 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
89 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
90
91 /*
92 * atl1c_init_pcie - init PCIE module
93 */
94 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
95 {
96 u32 data;
97 u32 pci_cmd;
98 struct pci_dev *pdev = hw->adapter->pdev;
99
100 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
101 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
102 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
103 PCI_COMMAND_IO);
104 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
105
106 /*
107 * Clear any PowerSaveing Settings
108 */
109 pci_enable_wake(pdev, PCI_D3hot, 0);
110 pci_enable_wake(pdev, PCI_D3cold, 0);
111
112 /*
113 * Mask some pcie error bits
114 */
115 AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
116 data &= ~PCIE_UC_SERVRITY_DLP;
117 data &= ~PCIE_UC_SERVRITY_FCP;
118 AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
119
120 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
121 atl1c_disable_l0s_l1(hw);
122 if (flag & ATL1C_PCIE_PHY_RESET)
123 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
124 else
125 AT_WRITE_REG(hw, REG_GPHY_CTRL,
126 GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
127
128 msleep(1);
129 }
130
131 /*
132 * atl1c_irq_enable - Enable default interrupt generation settings
133 * @adapter: board private structure
134 */
135 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
136 {
137 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
138 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
139 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
140 AT_WRITE_FLUSH(&adapter->hw);
141 }
142 }
143
144 /*
145 * atl1c_irq_disable - Mask off interrupt generation on the NIC
146 * @adapter: board private structure
147 */
148 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
149 {
150 atomic_inc(&adapter->irq_sem);
151 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
152 AT_WRITE_FLUSH(&adapter->hw);
153 synchronize_irq(adapter->pdev->irq);
154 }
155
156 /*
157 * atl1c_irq_reset - reset interrupt confiure on the NIC
158 * @adapter: board private structure
159 */
160 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
161 {
162 atomic_set(&adapter->irq_sem, 1);
163 atl1c_irq_enable(adapter);
164 }
165
166 /*
167 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
168 * of the idle status register until the device is actually idle
169 */
170 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
171 {
172 int timeout;
173 u32 data;
174
175 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
176 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
177 if ((data & IDLE_STATUS_MASK) == 0)
178 return 0;
179 msleep(1);
180 }
181 return data;
182 }
183
184 /*
185 * atl1c_phy_config - Timer Call-back
186 * @data: pointer to netdev cast into an unsigned long
187 */
188 static void atl1c_phy_config(unsigned long data)
189 {
190 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
191 struct atl1c_hw *hw = &adapter->hw;
192 unsigned long flags;
193
194 spin_lock_irqsave(&adapter->mdio_lock, flags);
195 atl1c_restart_autoneg(hw);
196 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
197 }
198
199 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
200 {
201 WARN_ON(in_interrupt());
202 atl1c_down(adapter);
203 atl1c_up(adapter);
204 clear_bit(__AT_RESETTING, &adapter->flags);
205 }
206
207 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
208 {
209 struct atl1c_hw *hw = &adapter->hw;
210 struct net_device *netdev = adapter->netdev;
211 struct pci_dev *pdev = adapter->pdev;
212 int err;
213 unsigned long flags;
214 u16 speed, duplex, phy_data;
215
216 spin_lock_irqsave(&adapter->mdio_lock, flags);
217 /* MII_BMSR must read twise */
218 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
219 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
220 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
221
222 if ((phy_data & BMSR_LSTATUS) == 0) {
223 /* link down */
224 if (netif_carrier_ok(netdev)) {
225 hw->hibernate = true;
226 if (atl1c_stop_mac(hw) != 0)
227 if (netif_msg_hw(adapter))
228 dev_warn(&pdev->dev,
229 "stop mac failed\n");
230 atl1c_set_aspm(hw, false);
231 }
232 netif_carrier_off(netdev);
233 } else {
234 /* Link Up */
235 hw->hibernate = false;
236 spin_lock_irqsave(&adapter->mdio_lock, flags);
237 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
238 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
239 if (unlikely(err))
240 return;
241 /* link result is our setting */
242 if (adapter->link_speed != speed ||
243 adapter->link_duplex != duplex) {
244 adapter->link_speed = speed;
245 adapter->link_duplex = duplex;
246 atl1c_set_aspm(hw, true);
247 atl1c_enable_tx_ctrl(hw);
248 atl1c_enable_rx_ctrl(hw);
249 atl1c_setup_mac_ctrl(adapter);
250 if (netif_msg_link(adapter))
251 dev_info(&pdev->dev,
252 "%s: %s NIC Link is Up<%d Mbps %s>\n",
253 atl1c_driver_name, netdev->name,
254 adapter->link_speed,
255 adapter->link_duplex == FULL_DUPLEX ?
256 "Full Duplex" : "Half Duplex");
257 }
258 if (!netif_carrier_ok(netdev))
259 netif_carrier_on(netdev);
260 }
261 }
262
263 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
264 {
265 struct net_device *netdev = adapter->netdev;
266 struct pci_dev *pdev = adapter->pdev;
267 u16 phy_data;
268 u16 link_up;
269
270 spin_lock(&adapter->mdio_lock);
271 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
272 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
273 spin_unlock(&adapter->mdio_lock);
274 link_up = phy_data & BMSR_LSTATUS;
275 /* notify upper layer link down ASAP */
276 if (!link_up) {
277 if (netif_carrier_ok(netdev)) {
278 /* old link state: Up */
279 netif_carrier_off(netdev);
280 if (netif_msg_link(adapter))
281 dev_info(&pdev->dev,
282 "%s: %s NIC Link is Down\n",
283 atl1c_driver_name, netdev->name);
284 adapter->link_speed = SPEED_0;
285 }
286 }
287
288 adapter->work_event |= ATL1C_WORK_EVENT_LINK_CHANGE;
289 schedule_work(&adapter->common_task);
290 }
291
292 static void atl1c_common_task(struct work_struct *work)
293 {
294 struct atl1c_adapter *adapter;
295 struct net_device *netdev;
296
297 adapter = container_of(work, struct atl1c_adapter, common_task);
298 netdev = adapter->netdev;
299
300 if (adapter->work_event & ATL1C_WORK_EVENT_RESET) {
301 netif_device_detach(netdev);
302 atl1c_down(adapter);
303 atl1c_up(adapter);
304 netif_device_attach(netdev);
305 return;
306 }
307
308 if (adapter->work_event & ATL1C_WORK_EVENT_LINK_CHANGE)
309 atl1c_check_link_status(adapter);
310
311 return;
312 }
313
314
315 static void atl1c_del_timer(struct atl1c_adapter *adapter)
316 {
317 del_timer_sync(&adapter->phy_config_timer);
318 }
319
320
321 /*
322 * atl1c_tx_timeout - Respond to a Tx Hang
323 * @netdev: network interface device structure
324 */
325 static void atl1c_tx_timeout(struct net_device *netdev)
326 {
327 struct atl1c_adapter *adapter = netdev_priv(netdev);
328
329 /* Do the reset outside of interrupt context */
330 adapter->work_event |= ATL1C_WORK_EVENT_RESET;
331 schedule_work(&adapter->common_task);
332 }
333
334 /*
335 * atl1c_set_multi - Multicast and Promiscuous mode set
336 * @netdev: network interface device structure
337 *
338 * The set_multi entry point is called whenever the multicast address
339 * list or the network interface flags are updated. This routine is
340 * responsible for configuring the hardware for proper multicast,
341 * promiscuous mode, and all-multi behavior.
342 */
343 static void atl1c_set_multi(struct net_device *netdev)
344 {
345 struct atl1c_adapter *adapter = netdev_priv(netdev);
346 struct atl1c_hw *hw = &adapter->hw;
347 struct dev_mc_list *mc_ptr;
348 u32 mac_ctrl_data;
349 u32 hash_value;
350
351 /* Check for Promiscuous and All Multicast modes */
352 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
353
354 if (netdev->flags & IFF_PROMISC) {
355 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
356 } else if (netdev->flags & IFF_ALLMULTI) {
357 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
358 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
359 } else {
360 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
361 }
362
363 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
364
365 /* clear the old settings from the multicast hash table */
366 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
367 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
368
369 /* comoute mc addresses' hash value ,and put it into hash table */
370 for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
371 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
372 atl1c_hash_set(hw, hash_value);
373 }
374 }
375
376 static void atl1c_vlan_rx_register(struct net_device *netdev,
377 struct vlan_group *grp)
378 {
379 struct atl1c_adapter *adapter = netdev_priv(netdev);
380 struct pci_dev *pdev = adapter->pdev;
381 u32 mac_ctrl_data = 0;
382
383 if (netif_msg_pktdata(adapter))
384 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
385
386 atl1c_irq_disable(adapter);
387
388 adapter->vlgrp = grp;
389 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
390
391 if (grp) {
392 /* enable VLAN tag insert/strip */
393 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
394 } else {
395 /* disable VLAN tag insert/strip */
396 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
397 }
398
399 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
400 atl1c_irq_enable(adapter);
401 }
402
403 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
404 {
405 struct pci_dev *pdev = adapter->pdev;
406
407 if (netif_msg_pktdata(adapter))
408 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
409 atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
410 }
411 /*
412 * atl1c_set_mac - Change the Ethernet Address of the NIC
413 * @netdev: network interface device structure
414 * @p: pointer to an address structure
415 *
416 * Returns 0 on success, negative on failure
417 */
418 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
419 {
420 struct atl1c_adapter *adapter = netdev_priv(netdev);
421 struct sockaddr *addr = p;
422
423 if (!is_valid_ether_addr(addr->sa_data))
424 return -EADDRNOTAVAIL;
425
426 if (netif_running(netdev))
427 return -EBUSY;
428
429 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
430 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
431
432 atl1c_hw_set_mac_addr(&adapter->hw);
433
434 return 0;
435 }
436
437 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
438 struct net_device *dev)
439 {
440 int mtu = dev->mtu;
441
442 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
443 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
444 }
445 /*
446 * atl1c_change_mtu - Change the Maximum Transfer Unit
447 * @netdev: network interface device structure
448 * @new_mtu: new value for maximum frame size
449 *
450 * Returns 0 on success, negative on failure
451 */
452 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
453 {
454 struct atl1c_adapter *adapter = netdev_priv(netdev);
455 int old_mtu = netdev->mtu;
456 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
457
458 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
459 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
460 if (netif_msg_link(adapter))
461 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
462 return -EINVAL;
463 }
464 /* set MTU */
465 if (old_mtu != new_mtu && netif_running(netdev)) {
466 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
467 msleep(1);
468 netdev->mtu = new_mtu;
469 adapter->hw.max_frame_size = new_mtu;
470 atl1c_set_rxbufsize(adapter, netdev);
471 atl1c_down(adapter);
472 atl1c_up(adapter);
473 clear_bit(__AT_RESETTING, &adapter->flags);
474 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
475 u32 phy_data;
476
477 AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
478 phy_data |= 0x10000000;
479 AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
480 }
481
482 }
483 return 0;
484 }
485
486 /*
487 * caller should hold mdio_lock
488 */
489 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
490 {
491 struct atl1c_adapter *adapter = netdev_priv(netdev);
492 u16 result;
493
494 atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
495 return result;
496 }
497
498 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
499 int reg_num, int val)
500 {
501 struct atl1c_adapter *adapter = netdev_priv(netdev);
502
503 atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
504 }
505
506 /*
507 * atl1c_mii_ioctl -
508 * @netdev:
509 * @ifreq:
510 * @cmd:
511 */
512 static int atl1c_mii_ioctl(struct net_device *netdev,
513 struct ifreq *ifr, int cmd)
514 {
515 struct atl1c_adapter *adapter = netdev_priv(netdev);
516 struct pci_dev *pdev = adapter->pdev;
517 struct mii_ioctl_data *data = if_mii(ifr);
518 unsigned long flags;
519 int retval = 0;
520
521 if (!netif_running(netdev))
522 return -EINVAL;
523
524 spin_lock_irqsave(&adapter->mdio_lock, flags);
525 switch (cmd) {
526 case SIOCGMIIPHY:
527 data->phy_id = 0;
528 break;
529
530 case SIOCGMIIREG:
531 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
532 &data->val_out)) {
533 retval = -EIO;
534 goto out;
535 }
536 break;
537
538 case SIOCSMIIREG:
539 if (data->reg_num & ~(0x1F)) {
540 retval = -EFAULT;
541 goto out;
542 }
543
544 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
545 data->reg_num, data->val_in);
546 if (atl1c_write_phy_reg(&adapter->hw,
547 data->reg_num, data->val_in)) {
548 retval = -EIO;
549 goto out;
550 }
551 break;
552
553 default:
554 retval = -EOPNOTSUPP;
555 break;
556 }
557 out:
558 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
559 return retval;
560 }
561
562 /*
563 * atl1c_ioctl -
564 * @netdev:
565 * @ifreq:
566 * @cmd:
567 */
568 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
569 {
570 switch (cmd) {
571 case SIOCGMIIPHY:
572 case SIOCGMIIREG:
573 case SIOCSMIIREG:
574 return atl1c_mii_ioctl(netdev, ifr, cmd);
575 default:
576 return -EOPNOTSUPP;
577 }
578 }
579
580 /*
581 * atl1c_alloc_queues - Allocate memory for all rings
582 * @adapter: board private structure to initialize
583 *
584 */
585 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
586 {
587 return 0;
588 }
589
590 static void atl1c_set_mac_type(struct atl1c_hw *hw)
591 {
592 switch (hw->device_id) {
593 case PCI_DEVICE_ID_ATTANSIC_L2C:
594 hw->nic_type = athr_l2c;
595 break;
596
597 case PCI_DEVICE_ID_ATTANSIC_L1C:
598 hw->nic_type = athr_l1c;
599 break;
600
601 default:
602 break;
603 }
604 }
605
606 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
607 {
608 u32 phy_status_data;
609 u32 link_ctrl_data;
610
611 atl1c_set_mac_type(hw);
612 AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
613 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
614
615 hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
616 ATL1C_INTR_MODRT_ENABLE |
617 ATL1C_RX_IPV6_CHKSUM |
618 ATL1C_TXQ_MODE_ENHANCE;
619 if (link_ctrl_data & LINK_CTRL_L0S_EN)
620 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
621 if (link_ctrl_data & LINK_CTRL_L1_EN)
622 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
623
624 if (hw->nic_type == athr_l1c) {
625 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
626 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
627 }
628 return 0;
629 }
630 /*
631 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
632 * @adapter: board private structure to initialize
633 *
634 * atl1c_sw_init initializes the Adapter private data structure.
635 * Fields are initialized based on PCI device information and
636 * OS network device settings (MTU size).
637 */
638 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
639 {
640 struct atl1c_hw *hw = &adapter->hw;
641 struct pci_dev *pdev = adapter->pdev;
642
643 adapter->wol = 0;
644 adapter->link_speed = SPEED_0;
645 adapter->link_duplex = FULL_DUPLEX;
646 adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
647 adapter->tpd_ring[0].count = 1024;
648 adapter->rfd_ring[0].count = 512;
649
650 hw->vendor_id = pdev->vendor;
651 hw->device_id = pdev->device;
652 hw->subsystem_vendor_id = pdev->subsystem_vendor;
653 hw->subsystem_id = pdev->subsystem_device;
654
655 /* before link up, we assume hibernate is true */
656 hw->hibernate = true;
657 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
658 if (atl1c_setup_mac_funcs(hw) != 0) {
659 dev_err(&pdev->dev, "set mac function pointers failed\n");
660 return -1;
661 }
662 hw->intr_mask = IMR_NORMAL_MASK;
663 hw->phy_configured = false;
664 hw->preamble_len = 7;
665 hw->max_frame_size = adapter->netdev->mtu;
666 if (adapter->num_rx_queues < 2) {
667 hw->rss_type = atl1c_rss_disable;
668 hw->rss_mode = atl1c_rss_mode_disable;
669 } else {
670 hw->rss_type = atl1c_rss_ipv4;
671 hw->rss_mode = atl1c_rss_mul_que_mul_int;
672 hw->rss_hash_bits = 16;
673 }
674 hw->autoneg_advertised = ADVERTISED_Autoneg;
675 hw->indirect_tab = 0xE4E4E4E4;
676 hw->base_cpu = 0;
677
678 hw->ict = 50000; /* 100ms */
679 hw->smb_timer = 200000; /* 400ms */
680 hw->cmb_tpd = 4;
681 hw->cmb_tx_timer = 1; /* 2 us */
682 hw->rx_imt = 200;
683 hw->tx_imt = 1000;
684
685 hw->tpd_burst = 5;
686 hw->rfd_burst = 8;
687 hw->dma_order = atl1c_dma_ord_out;
688 hw->dmar_block = atl1c_dma_req_1024;
689 hw->dmaw_block = atl1c_dma_req_1024;
690 hw->dmar_dly_cnt = 15;
691 hw->dmaw_dly_cnt = 4;
692
693 if (atl1c_alloc_queues(adapter)) {
694 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
695 return -ENOMEM;
696 }
697 /* TODO */
698 atl1c_set_rxbufsize(adapter, adapter->netdev);
699 atomic_set(&adapter->irq_sem, 1);
700 spin_lock_init(&adapter->mdio_lock);
701 spin_lock_init(&adapter->tx_lock);
702 set_bit(__AT_DOWN, &adapter->flags);
703
704 return 0;
705 }
706
707 /*
708 * atl1c_clean_tx_ring - Free Tx-skb
709 * @adapter: board private structure
710 */
711 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
712 enum atl1c_trans_queue type)
713 {
714 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
715 struct atl1c_buffer *buffer_info;
716 struct pci_dev *pdev = adapter->pdev;
717 u16 index, ring_count;
718
719 ring_count = tpd_ring->count;
720 for (index = 0; index < ring_count; index++) {
721 buffer_info = &tpd_ring->buffer_info[index];
722 if (buffer_info->state == ATL1_BUFFER_FREE)
723 continue;
724 if (buffer_info->dma)
725 pci_unmap_single(pdev, buffer_info->dma,
726 buffer_info->length,
727 PCI_DMA_TODEVICE);
728 if (buffer_info->skb)
729 dev_kfree_skb(buffer_info->skb);
730 buffer_info->dma = 0;
731 buffer_info->skb = NULL;
732 buffer_info->state = ATL1_BUFFER_FREE;
733 }
734
735 /* Zero out Tx-buffers */
736 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
737 ring_count);
738 atomic_set(&tpd_ring->next_to_clean, 0);
739 tpd_ring->next_to_use = 0;
740 }
741
742 /*
743 * atl1c_clean_rx_ring - Free rx-reservation skbs
744 * @adapter: board private structure
745 */
746 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
747 {
748 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
749 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
750 struct atl1c_buffer *buffer_info;
751 struct pci_dev *pdev = adapter->pdev;
752 int i, j;
753
754 for (i = 0; i < adapter->num_rx_queues; i++) {
755 for (j = 0; j < rfd_ring[i].count; j++) {
756 buffer_info = &rfd_ring[i].buffer_info[j];
757 if (buffer_info->state == ATL1_BUFFER_FREE)
758 continue;
759 if (buffer_info->dma)
760 pci_unmap_single(pdev, buffer_info->dma,
761 buffer_info->length,
762 PCI_DMA_FROMDEVICE);
763 if (buffer_info->skb)
764 dev_kfree_skb(buffer_info->skb);
765 buffer_info->state = ATL1_BUFFER_FREE;
766 buffer_info->skb = NULL;
767 }
768 /* zero out the descriptor ring */
769 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
770 rfd_ring[i].next_to_clean = 0;
771 rfd_ring[i].next_to_use = 0;
772 rrd_ring[i].next_to_use = 0;
773 rrd_ring[i].next_to_clean = 0;
774 }
775 }
776
777 /*
778 * Read / Write Ptr Initialize:
779 */
780 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
781 {
782 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
783 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
784 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
785 struct atl1c_buffer *buffer_info;
786 int i, j;
787
788 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
789 tpd_ring[i].next_to_use = 0;
790 atomic_set(&tpd_ring[i].next_to_clean, 0);
791 buffer_info = tpd_ring[i].buffer_info;
792 for (j = 0; j < tpd_ring->count; j++)
793 buffer_info[i].state = ATL1_BUFFER_FREE;
794 }
795 for (i = 0; i < adapter->num_rx_queues; i++) {
796 rfd_ring[i].next_to_use = 0;
797 rfd_ring[i].next_to_clean = 0;
798 rrd_ring[i].next_to_use = 0;
799 rrd_ring[i].next_to_clean = 0;
800 for (j = 0; j < rfd_ring[i].count; j++) {
801 buffer_info = &rfd_ring[i].buffer_info[j];
802 buffer_info->state = ATL1_BUFFER_FREE;
803 }
804 }
805 }
806
807 /*
808 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
809 * @adapter: board private structure
810 *
811 * Free all transmit software resources
812 */
813 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
814 {
815 struct pci_dev *pdev = adapter->pdev;
816
817 pci_free_consistent(pdev, adapter->ring_header.size,
818 adapter->ring_header.desc,
819 adapter->ring_header.dma);
820 adapter->ring_header.desc = NULL;
821
822 /* Note: just free tdp_ring.buffer_info,
823 * it contain rfd_ring.buffer_info, do not double free */
824 if (adapter->tpd_ring[0].buffer_info) {
825 kfree(adapter->tpd_ring[0].buffer_info);
826 adapter->tpd_ring[0].buffer_info = NULL;
827 }
828 }
829
830 /*
831 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
832 * @adapter: board private structure
833 *
834 * Return 0 on success, negative on failure
835 */
836 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
837 {
838 struct pci_dev *pdev = adapter->pdev;
839 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
840 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
841 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
842 struct atl1c_ring_header *ring_header = &adapter->ring_header;
843 int num_rx_queues = adapter->num_rx_queues;
844 int size;
845 int i;
846 int count = 0;
847 int rx_desc_count = 0;
848 u32 offset = 0;
849
850 rrd_ring[0].count = rfd_ring[0].count;
851 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
852 tpd_ring[i].count = tpd_ring[0].count;
853
854 for (i = 1; i < adapter->num_rx_queues; i++)
855 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
856
857 /* 2 tpd queue, one high priority queue,
858 * another normal priority queue */
859 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
860 rfd_ring->count * num_rx_queues);
861 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
862 if (unlikely(!tpd_ring->buffer_info)) {
863 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
864 size);
865 goto err_nomem;
866 }
867 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
868 tpd_ring[i].buffer_info =
869 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
870 count += tpd_ring[i].count;
871 }
872
873 for (i = 0; i < num_rx_queues; i++) {
874 rfd_ring[i].buffer_info =
875 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
876 count += rfd_ring[i].count;
877 rx_desc_count += rfd_ring[i].count;
878 }
879 /*
880 * real ring DMA buffer
881 * each ring/block may need up to 8 bytes for alignment, hence the
882 * additional bytes tacked onto the end.
883 */
884 ring_header->size = size =
885 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
886 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
887 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
888 sizeof(struct atl1c_hw_stats) +
889 8 * 4 + 8 * 2 * num_rx_queues;
890
891 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
892 &ring_header->dma);
893 if (unlikely(!ring_header->desc)) {
894 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
895 goto err_nomem;
896 }
897 memset(ring_header->desc, 0, ring_header->size);
898 /* init TPD ring */
899
900 tpd_ring[0].dma = roundup(ring_header->dma, 8);
901 offset = tpd_ring[0].dma - ring_header->dma;
902 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
903 tpd_ring[i].dma = ring_header->dma + offset;
904 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
905 tpd_ring[i].size =
906 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
907 offset += roundup(tpd_ring[i].size, 8);
908 }
909 /* init RFD ring */
910 for (i = 0; i < num_rx_queues; i++) {
911 rfd_ring[i].dma = ring_header->dma + offset;
912 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
913 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
914 rfd_ring[i].count;
915 offset += roundup(rfd_ring[i].size, 8);
916 }
917
918 /* init RRD ring */
919 for (i = 0; i < num_rx_queues; i++) {
920 rrd_ring[i].dma = ring_header->dma + offset;
921 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
922 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
923 rrd_ring[i].count;
924 offset += roundup(rrd_ring[i].size, 8);
925 }
926
927 adapter->smb.dma = ring_header->dma + offset;
928 adapter->smb.smb = (u8 *)ring_header->desc + offset;
929 return 0;
930
931 err_nomem:
932 kfree(tpd_ring->buffer_info);
933 return -ENOMEM;
934 }
935
936 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
937 {
938 struct atl1c_hw *hw = &adapter->hw;
939 struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
940 adapter->rfd_ring;
941 struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
942 adapter->rrd_ring;
943 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
944 adapter->tpd_ring;
945 struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
946 struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
947 int i;
948
949 /* TPD */
950 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
951 (u32)((tpd_ring[atl1c_trans_normal].dma &
952 AT_DMA_HI_ADDR_MASK) >> 32));
953 /* just enable normal priority TX queue */
954 AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
955 (u32)(tpd_ring[atl1c_trans_normal].dma &
956 AT_DMA_LO_ADDR_MASK));
957 AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
958 (u32)(tpd_ring[atl1c_trans_high].dma &
959 AT_DMA_LO_ADDR_MASK));
960 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
961 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
962
963
964 /* RFD */
965 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
966 (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
967 for (i = 0; i < adapter->num_rx_queues; i++)
968 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
969 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
970
971 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
972 rfd_ring[0].count & RFD_RING_SIZE_MASK);
973 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
974 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
975
976 /* RRD */
977 for (i = 0; i < adapter->num_rx_queues; i++)
978 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
979 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
980 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
981 (rrd_ring[0].count & RRD_RING_SIZE_MASK));
982
983 /* CMB */
984 AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
985
986 /* SMB */
987 AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
988 (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
989 AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
990 (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
991 /* Load all of base address above */
992 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
993 }
994
995 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
996 {
997 struct atl1c_hw *hw = &adapter->hw;
998 u32 dev_ctrl_data;
999 u32 max_pay_load;
1000 u16 tx_offload_thresh;
1001 u32 txq_ctrl_data;
1002 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
1003
1004 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1005 tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1006 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1007 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1008 AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1009 max_pay_load = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1010 DEVICE_CTRL_MAX_PAYLOAD_MASK;
1011 hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1012 max_pay_load = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1013 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1014 hw->dmar_block = min(max_pay_load, hw->dmar_block);
1015
1016 txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1017 TXQ_NUM_TPD_BURST_SHIFT;
1018 if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1019 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1020 txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1021 TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1022
1023 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1024 }
1025
1026 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1027 {
1028 struct atl1c_hw *hw = &adapter->hw;
1029 u32 rxq_ctrl_data;
1030
1031 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1032 RXQ_RFD_BURST_NUM_SHIFT;
1033
1034 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1035 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1036 if (hw->rss_type == atl1c_rss_ipv4)
1037 rxq_ctrl_data |= RSS_HASH_IPV4;
1038 if (hw->rss_type == atl1c_rss_ipv4_tcp)
1039 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1040 if (hw->rss_type == atl1c_rss_ipv6)
1041 rxq_ctrl_data |= RSS_HASH_IPV6;
1042 if (hw->rss_type == atl1c_rss_ipv6_tcp)
1043 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1044 if (hw->rss_type != atl1c_rss_disable)
1045 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1046
1047 rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1048 RSS_MODE_SHIFT;
1049 rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1050 RSS_HASH_BITS_SHIFT;
1051 if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1052 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1053 ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1054
1055 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1056 }
1057
1058 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1059 {
1060 struct atl1c_hw *hw = &adapter->hw;
1061
1062 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1063 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1064 }
1065
1066 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1067 {
1068 struct atl1c_hw *hw = &adapter->hw;
1069 u32 dma_ctrl_data;
1070
1071 dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1072 if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1073 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1074 if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1075 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1076 else
1077 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1078
1079 switch (hw->dma_order) {
1080 case atl1c_dma_ord_in:
1081 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1082 break;
1083 case atl1c_dma_ord_enh:
1084 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1085 break;
1086 case atl1c_dma_ord_out:
1087 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1088 break;
1089 default:
1090 break;
1091 }
1092
1093 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1094 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1095 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1096 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1097 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1098 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1099 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1100 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1101
1102 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1103 }
1104
1105 /*
1106 * Stop the mac, transmit and receive units
1107 * hw - Struct containing variables accessed by shared code
1108 * return : 0 or idle status (if error)
1109 */
1110 static int atl1c_stop_mac(struct atl1c_hw *hw)
1111 {
1112 u32 data;
1113
1114 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1115 data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1116 RXQ3_CTRL_EN | RXQ_CTRL_EN);
1117 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1118
1119 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1120 data &= ~TXQ_CTRL_EN;
1121 AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1122
1123 atl1c_wait_until_idle(hw);
1124
1125 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1126 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1127 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1128
1129 return (int)atl1c_wait_until_idle(hw);
1130 }
1131
1132 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1133 {
1134 u32 data;
1135
1136 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1137 switch (hw->adapter->num_rx_queues) {
1138 case 4:
1139 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1140 break;
1141 case 3:
1142 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1143 break;
1144 case 2:
1145 data |= RXQ1_CTRL_EN;
1146 break;
1147 default:
1148 break;
1149 }
1150 data |= RXQ_CTRL_EN;
1151 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1152 }
1153
1154 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1155 {
1156 u32 data;
1157
1158 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1159 data |= TXQ_CTRL_EN;
1160 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1161 }
1162
1163 /*
1164 * Reset the transmit and receive units; mask and clear all interrupts.
1165 * hw - Struct containing variables accessed by shared code
1166 * return : 0 or idle status (if error)
1167 */
1168 static int atl1c_reset_mac(struct atl1c_hw *hw)
1169 {
1170 struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1171 struct pci_dev *pdev = adapter->pdev;
1172 int ret;
1173
1174 AT_WRITE_REG(hw, REG_IMR, 0);
1175 AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1176
1177 ret = atl1c_stop_mac(hw);
1178 if (ret)
1179 return ret;
1180 /*
1181 * Issue Soft Reset to the MAC. This will reset the chip's
1182 * transmit, receive, DMA. It will not effect
1183 * the current PCI configuration. The global reset bit is self-
1184 * clearing, and should clear within a microsecond.
1185 */
1186 AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1187 AT_WRITE_FLUSH(hw);
1188 msleep(10);
1189 /* Wait at least 10ms for All module to be Idle */
1190
1191 if (atl1c_wait_until_idle(hw)) {
1192 dev_err(&pdev->dev,
1193 "MAC state machine can't be idle since"
1194 " disabled for 10ms second\n");
1195 return -1;
1196 }
1197 return 0;
1198 }
1199
1200 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1201 {
1202 u32 pm_ctrl_data;
1203
1204 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1205 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1206 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1207 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1208 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1209 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1210 pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1211 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1212
1213 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1214 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1215 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1216 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1217 }
1218
1219 /*
1220 * Set ASPM state.
1221 * Enable/disable L0s/L1 depend on link state.
1222 */
1223 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1224 {
1225 u32 pm_ctrl_data;
1226
1227 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1228
1229 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1230 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1231 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1232
1233 pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1234
1235 if (linkup) {
1236 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1237 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1238
1239 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1240 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1241 } else {
1242 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1243 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1244 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1245 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1246
1247 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1248
1249 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1250 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1251 else
1252 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1253 }
1254
1255 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1256 }
1257
1258 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1259 {
1260 struct atl1c_hw *hw = &adapter->hw;
1261 struct net_device *netdev = adapter->netdev;
1262 u32 mac_ctrl_data;
1263
1264 mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1265 mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1266
1267 if (adapter->link_duplex == FULL_DUPLEX) {
1268 hw->mac_duplex = true;
1269 mac_ctrl_data |= MAC_CTRL_DUPLX;
1270 }
1271
1272 if (adapter->link_speed == SPEED_1000)
1273 hw->mac_speed = atl1c_mac_speed_1000;
1274 else
1275 hw->mac_speed = atl1c_mac_speed_10_100;
1276
1277 mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1278 MAC_CTRL_SPEED_SHIFT;
1279
1280 mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1281 mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1282 MAC_CTRL_PRMLEN_SHIFT);
1283
1284 if (adapter->vlgrp)
1285 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1286
1287 mac_ctrl_data |= MAC_CTRL_BC_EN;
1288 if (netdev->flags & IFF_PROMISC)
1289 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1290 if (netdev->flags & IFF_ALLMULTI)
1291 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1292
1293 mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1294 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1295 }
1296
1297 /*
1298 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1299 * @adapter: board private structure
1300 *
1301 * Configure the Tx /Rx unit of the MAC after a reset.
1302 */
1303 static int atl1c_configure(struct atl1c_adapter *adapter)
1304 {
1305 struct atl1c_hw *hw = &adapter->hw;
1306 u32 master_ctrl_data = 0;
1307 u32 intr_modrt_data;
1308
1309 /* clear interrupt status */
1310 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1311 /* Clear any WOL status */
1312 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1313 /* set Interrupt Clear Timer
1314 * HW will enable self to assert interrupt event to system after
1315 * waiting x-time for software to notify it accept interrupt.
1316 */
1317 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1318 hw->ict & INT_RETRIG_TIMER_MASK);
1319
1320 atl1c_configure_des_ring(adapter);
1321
1322 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1323 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1324 IRQ_MODRT_TX_TIMER_SHIFT;
1325 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1326 IRQ_MODRT_RX_TIMER_SHIFT;
1327 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1328 master_ctrl_data |=
1329 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1330 }
1331
1332 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1333 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1334
1335 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1336
1337 if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1338 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1339 hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1340 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1341 hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1342 }
1343
1344 if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1345 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1346 hw->smb_timer & SMB_STAT_TIMER_MASK);
1347 /* set MTU */
1348 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1349 VLAN_HLEN + ETH_FCS_LEN);
1350 /* HDS, disable */
1351 AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1352
1353 atl1c_configure_tx(adapter);
1354 atl1c_configure_rx(adapter);
1355 atl1c_configure_rss(adapter);
1356 atl1c_configure_dma(adapter);
1357
1358 return 0;
1359 }
1360
1361 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1362 {
1363 u16 hw_reg_addr = 0;
1364 unsigned long *stats_item = NULL;
1365 u32 data;
1366
1367 /* update rx status */
1368 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1369 stats_item = &adapter->hw_stats.rx_ok;
1370 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1371 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1372 *stats_item += data;
1373 stats_item++;
1374 hw_reg_addr += 4;
1375 }
1376 /* update tx status */
1377 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1378 stats_item = &adapter->hw_stats.tx_ok;
1379 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1380 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1381 *stats_item += data;
1382 stats_item++;
1383 hw_reg_addr += 4;
1384 }
1385 }
1386
1387 /*
1388 * atl1c_get_stats - Get System Network Statistics
1389 * @netdev: network interface device structure
1390 *
1391 * Returns the address of the device statistics structure.
1392 * The statistics are actually updated from the timer callback.
1393 */
1394 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1395 {
1396 struct atl1c_adapter *adapter = netdev_priv(netdev);
1397 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1398 struct net_device_stats *net_stats = &adapter->net_stats;
1399
1400 atl1c_update_hw_stats(adapter);
1401 net_stats->rx_packets = hw_stats->rx_ok;
1402 net_stats->tx_packets = hw_stats->tx_ok;
1403 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1404 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1405 net_stats->multicast = hw_stats->rx_mcast;
1406 net_stats->collisions = hw_stats->tx_1_col +
1407 hw_stats->tx_2_col * 2 +
1408 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1409 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1410 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1411 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1412 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1413 net_stats->rx_length_errors = hw_stats->rx_len_err;
1414 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1415 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1416 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1417
1418 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1419
1420 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1421 hw_stats->tx_underrun + hw_stats->tx_trunc;
1422 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1423 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1424 net_stats->tx_window_errors = hw_stats->tx_late_col;
1425
1426 return &adapter->net_stats;
1427 }
1428
1429 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1430 {
1431 u16 phy_data;
1432
1433 spin_lock(&adapter->mdio_lock);
1434 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1435 spin_unlock(&adapter->mdio_lock);
1436 }
1437
1438 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1439 enum atl1c_trans_queue type)
1440 {
1441 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1442 &adapter->tpd_ring[type];
1443 struct atl1c_buffer *buffer_info;
1444 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1445 u16 hw_next_to_clean;
1446 u16 shift;
1447 u32 data;
1448
1449 if (type == atl1c_trans_high)
1450 shift = MB_HTPD_CONS_IDX_SHIFT;
1451 else
1452 shift = MB_NTPD_CONS_IDX_SHIFT;
1453
1454 AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1455 hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1456
1457 while (next_to_clean != hw_next_to_clean) {
1458 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1459 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1460 pci_unmap_page(adapter->pdev, buffer_info->dma,
1461 buffer_info->length, PCI_DMA_TODEVICE);
1462 buffer_info->dma = 0;
1463 if (buffer_info->skb) {
1464 dev_kfree_skb_irq(buffer_info->skb);
1465 buffer_info->skb = NULL;
1466 }
1467 buffer_info->state = ATL1_BUFFER_FREE;
1468 }
1469 if (++next_to_clean == tpd_ring->count)
1470 next_to_clean = 0;
1471 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1472 }
1473
1474 if (netif_queue_stopped(adapter->netdev) &&
1475 netif_carrier_ok(adapter->netdev)) {
1476 netif_wake_queue(adapter->netdev);
1477 }
1478
1479 return true;
1480 }
1481
1482 /*
1483 * atl1c_intr - Interrupt Handler
1484 * @irq: interrupt number
1485 * @data: pointer to a network interface device structure
1486 * @pt_regs: CPU registers structure
1487 */
1488 static irqreturn_t atl1c_intr(int irq, void *data)
1489 {
1490 struct net_device *netdev = data;
1491 struct atl1c_adapter *adapter = netdev_priv(netdev);
1492 struct pci_dev *pdev = adapter->pdev;
1493 struct atl1c_hw *hw = &adapter->hw;
1494 int max_ints = AT_MAX_INT_WORK;
1495 int handled = IRQ_NONE;
1496 u32 status;
1497 u32 reg_data;
1498
1499 do {
1500 AT_READ_REG(hw, REG_ISR, &reg_data);
1501 status = reg_data & hw->intr_mask;
1502
1503 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1504 if (max_ints != AT_MAX_INT_WORK)
1505 handled = IRQ_HANDLED;
1506 break;
1507 }
1508 /* link event */
1509 if (status & ISR_GPHY)
1510 atl1c_clear_phy_int(adapter);
1511 /* Ack ISR */
1512 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1513 if (status & ISR_RX_PKT) {
1514 if (likely(napi_schedule_prep(&adapter->napi))) {
1515 hw->intr_mask &= ~ISR_RX_PKT;
1516 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1517 __napi_schedule(&adapter->napi);
1518 }
1519 }
1520 if (status & ISR_TX_PKT)
1521 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1522
1523 handled = IRQ_HANDLED;
1524 /* check if PCIE PHY Link down */
1525 if (status & ISR_ERROR) {
1526 if (netif_msg_hw(adapter))
1527 dev_err(&pdev->dev,
1528 "atl1c hardware error (status = 0x%x)\n",
1529 status & ISR_ERROR);
1530 /* reset MAC */
1531 hw->intr_mask &= ~ISR_ERROR;
1532 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1533 adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1534 schedule_work(&adapter->common_task);
1535 break;
1536 }
1537
1538 if (status & ISR_OVER)
1539 if (netif_msg_intr(adapter))
1540 dev_warn(&pdev->dev,
1541 "TX/RX over flow (status = 0x%x)\n",
1542 status & ISR_OVER);
1543
1544 /* link event */
1545 if (status & (ISR_GPHY | ISR_MANUAL)) {
1546 adapter->net_stats.tx_carrier_errors++;
1547 atl1c_link_chg_event(adapter);
1548 break;
1549 }
1550
1551 } while (--max_ints > 0);
1552 /* re-enable Interrupt*/
1553 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1554 return handled;
1555 }
1556
1557 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1558 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1559 {
1560 /*
1561 * The pid field in RRS in not correct sometimes, so we
1562 * cannot figure out if the packet is fragmented or not,
1563 * so we tell the KERNEL CHECKSUM_NONE
1564 */
1565 skb->ip_summed = CHECKSUM_NONE;
1566 }
1567
1568 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1569 {
1570 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1571 struct pci_dev *pdev = adapter->pdev;
1572 struct atl1c_buffer *buffer_info, *next_info;
1573 struct sk_buff *skb;
1574 void *vir_addr = NULL;
1575 u16 num_alloc = 0;
1576 u16 rfd_next_to_use, next_next;
1577 struct atl1c_rx_free_desc *rfd_desc;
1578
1579 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1580 if (++next_next == rfd_ring->count)
1581 next_next = 0;
1582 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1583 next_info = &rfd_ring->buffer_info[next_next];
1584
1585 while (next_info->state == ATL1_BUFFER_FREE) {
1586 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1587
1588 skb = dev_alloc_skb(adapter->rx_buffer_len);
1589 if (unlikely(!skb)) {
1590 if (netif_msg_rx_err(adapter))
1591 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1592 break;
1593 }
1594
1595 /*
1596 * Make buffer alignment 2 beyond a 16 byte boundary
1597 * this will result in a 16 byte aligned IP header after
1598 * the 14 byte MAC header is removed
1599 */
1600 vir_addr = skb->data;
1601 buffer_info->state = ATL1_BUFFER_BUSY;
1602 buffer_info->skb = skb;
1603 buffer_info->length = adapter->rx_buffer_len;
1604 buffer_info->dma = pci_map_single(pdev, vir_addr,
1605 buffer_info->length,
1606 PCI_DMA_FROMDEVICE);
1607 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1608 rfd_next_to_use = next_next;
1609 if (++next_next == rfd_ring->count)
1610 next_next = 0;
1611 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1612 next_info = &rfd_ring->buffer_info[next_next];
1613 num_alloc++;
1614 }
1615
1616 if (num_alloc) {
1617 /* TODO: update mailbox here */
1618 wmb();
1619 rfd_ring->next_to_use = rfd_next_to_use;
1620 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1621 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1622 }
1623
1624 return num_alloc;
1625 }
1626
1627 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1628 struct atl1c_recv_ret_status *rrs, u16 num)
1629 {
1630 u16 i;
1631 /* the relationship between rrd and rfd is one map one */
1632 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1633 rrd_ring->next_to_clean)) {
1634 rrs->word3 &= ~RRS_RXD_UPDATED;
1635 if (++rrd_ring->next_to_clean == rrd_ring->count)
1636 rrd_ring->next_to_clean = 0;
1637 }
1638 }
1639
1640 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1641 struct atl1c_recv_ret_status *rrs, u16 num)
1642 {
1643 u16 i;
1644 u16 rfd_index;
1645 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1646
1647 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1648 RRS_RX_RFD_INDEX_MASK;
1649 for (i = 0; i < num; i++) {
1650 buffer_info[rfd_index].skb = NULL;
1651 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1652 if (++rfd_index == rfd_ring->count)
1653 rfd_index = 0;
1654 }
1655 rfd_ring->next_to_clean = rfd_index;
1656 }
1657
1658 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1659 int *work_done, int work_to_do)
1660 {
1661 u16 rfd_num, rfd_index;
1662 u16 count = 0;
1663 u16 length;
1664 struct pci_dev *pdev = adapter->pdev;
1665 struct net_device *netdev = adapter->netdev;
1666 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1667 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1668 struct sk_buff *skb;
1669 struct atl1c_recv_ret_status *rrs;
1670 struct atl1c_buffer *buffer_info;
1671
1672 while (1) {
1673 if (*work_done >= work_to_do)
1674 break;
1675 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1676 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1677 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1678 RRS_RX_RFD_CNT_MASK;
1679 if (unlikely(rfd_num != 1))
1680 /* TODO support mul rfd*/
1681 if (netif_msg_rx_err(adapter))
1682 dev_warn(&pdev->dev,
1683 "Multi rfd not support yet!\n");
1684 goto rrs_checked;
1685 } else {
1686 break;
1687 }
1688 rrs_checked:
1689 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1690 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1691 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1692 if (netif_msg_rx_err(adapter))
1693 dev_warn(&pdev->dev,
1694 "wrong packet! rrs word3 is %x\n",
1695 rrs->word3);
1696 continue;
1697 }
1698
1699 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1700 RRS_PKT_SIZE_MASK);
1701 /* Good Receive */
1702 if (likely(rfd_num == 1)) {
1703 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1704 RRS_RX_RFD_INDEX_MASK;
1705 buffer_info = &rfd_ring->buffer_info[rfd_index];
1706 pci_unmap_single(pdev, buffer_info->dma,
1707 buffer_info->length, PCI_DMA_FROMDEVICE);
1708 skb = buffer_info->skb;
1709 } else {
1710 /* TODO */
1711 if (netif_msg_rx_err(adapter))
1712 dev_warn(&pdev->dev,
1713 "Multi rfd not support yet!\n");
1714 break;
1715 }
1716 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1717 skb_put(skb, length - ETH_FCS_LEN);
1718 skb->protocol = eth_type_trans(skb, netdev);
1719 skb->dev = netdev;
1720 atl1c_rx_checksum(adapter, skb, rrs);
1721 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1722 u16 vlan;
1723
1724 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1725 vlan = le16_to_cpu(vlan);
1726 vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1727 } else
1728 netif_receive_skb(skb);
1729
1730 (*work_done)++;
1731 count++;
1732 }
1733 if (count)
1734 atl1c_alloc_rx_buffer(adapter, que);
1735 }
1736
1737 /*
1738 * atl1c_clean - NAPI Rx polling callback
1739 * @adapter: board private structure
1740 */
1741 static int atl1c_clean(struct napi_struct *napi, int budget)
1742 {
1743 struct atl1c_adapter *adapter =
1744 container_of(napi, struct atl1c_adapter, napi);
1745 int work_done = 0;
1746
1747 /* Keep link state information with original netdev */
1748 if (!netif_carrier_ok(adapter->netdev))
1749 goto quit_polling;
1750 /* just enable one RXQ */
1751 atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1752
1753 if (work_done < budget) {
1754 quit_polling:
1755 napi_complete(napi);
1756 adapter->hw.intr_mask |= ISR_RX_PKT;
1757 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1758 }
1759 return work_done;
1760 }
1761
1762 #ifdef CONFIG_NET_POLL_CONTROLLER
1763
1764 /*
1765 * Polling 'interrupt' - used by things like netconsole to send skbs
1766 * without having to re-enable interrupts. It's not called while
1767 * the interrupt routine is executing.
1768 */
1769 static void atl1c_netpoll(struct net_device *netdev)
1770 {
1771 struct atl1c_adapter *adapter = netdev_priv(netdev);
1772
1773 disable_irq(adapter->pdev->irq);
1774 atl1c_intr(adapter->pdev->irq, netdev);
1775 enable_irq(adapter->pdev->irq);
1776 }
1777 #endif
1778
1779 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1780 {
1781 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1782 u16 next_to_use = 0;
1783 u16 next_to_clean = 0;
1784
1785 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1786 next_to_use = tpd_ring->next_to_use;
1787
1788 return (u16)(next_to_clean > next_to_use) ?
1789 (next_to_clean - next_to_use - 1) :
1790 (tpd_ring->count + next_to_clean - next_to_use - 1);
1791 }
1792
1793 /*
1794 * get next usable tpd
1795 * Note: should call atl1c_tdp_avail to make sure
1796 * there is enough tpd to use
1797 */
1798 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1799 enum atl1c_trans_queue type)
1800 {
1801 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1802 struct atl1c_tpd_desc *tpd_desc;
1803 u16 next_to_use = 0;
1804
1805 next_to_use = tpd_ring->next_to_use;
1806 if (++tpd_ring->next_to_use == tpd_ring->count)
1807 tpd_ring->next_to_use = 0;
1808 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1809 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1810 return tpd_desc;
1811 }
1812
1813 static struct atl1c_buffer *
1814 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1815 {
1816 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1817
1818 return &tpd_ring->buffer_info[tpd -
1819 (struct atl1c_tpd_desc *)tpd_ring->desc];
1820 }
1821
1822 /* Calculate the transmit packet descript needed*/
1823 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1824 {
1825 u16 tpd_req;
1826 u16 proto_hdr_len = 0;
1827
1828 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1829
1830 if (skb_is_gso(skb)) {
1831 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1832 if (proto_hdr_len < skb_headlen(skb))
1833 tpd_req++;
1834 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1835 tpd_req++;
1836 }
1837 return tpd_req;
1838 }
1839
1840 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1841 struct sk_buff *skb,
1842 struct atl1c_tpd_desc **tpd,
1843 enum atl1c_trans_queue type)
1844 {
1845 struct pci_dev *pdev = adapter->pdev;
1846 u8 hdr_len;
1847 u32 real_len;
1848 unsigned short offload_type;
1849 int err;
1850
1851 if (skb_is_gso(skb)) {
1852 if (skb_header_cloned(skb)) {
1853 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1854 if (unlikely(err))
1855 return -1;
1856 }
1857 offload_type = skb_shinfo(skb)->gso_type;
1858
1859 if (offload_type & SKB_GSO_TCPV4) {
1860 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1861 + ntohs(ip_hdr(skb)->tot_len));
1862
1863 if (real_len < skb->len)
1864 pskb_trim(skb, real_len);
1865
1866 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1867 if (unlikely(skb->len == hdr_len)) {
1868 /* only xsum need */
1869 if (netif_msg_tx_queued(adapter))
1870 dev_warn(&pdev->dev,
1871 "IPV4 tso with zero data??\n");
1872 goto check_sum;
1873 } else {
1874 ip_hdr(skb)->check = 0;
1875 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1876 ip_hdr(skb)->saddr,
1877 ip_hdr(skb)->daddr,
1878 0, IPPROTO_TCP, 0);
1879 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1880 }
1881 }
1882
1883 if (offload_type & SKB_GSO_TCPV6) {
1884 struct atl1c_tpd_ext_desc *etpd =
1885 *(struct atl1c_tpd_ext_desc **)(tpd);
1886
1887 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1888 *tpd = atl1c_get_tpd(adapter, type);
1889 ipv6_hdr(skb)->payload_len = 0;
1890 /* check payload == 0 byte ? */
1891 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1892 if (unlikely(skb->len == hdr_len)) {
1893 /* only xsum need */
1894 if (netif_msg_tx_queued(adapter))
1895 dev_warn(&pdev->dev,
1896 "IPV6 tso with zero data??\n");
1897 goto check_sum;
1898 } else
1899 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1900 &ipv6_hdr(skb)->saddr,
1901 &ipv6_hdr(skb)->daddr,
1902 0, IPPROTO_TCP, 0);
1903 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1904 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1905 etpd->pkt_len = cpu_to_le32(skb->len);
1906 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1907 }
1908
1909 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1910 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1911 TPD_TCPHDR_OFFSET_SHIFT;
1912 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1913 TPD_MSS_SHIFT;
1914 return 0;
1915 }
1916
1917 check_sum:
1918 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1919 u8 css, cso;
1920 cso = skb_transport_offset(skb);
1921
1922 if (unlikely(cso & 0x1)) {
1923 if (netif_msg_tx_err(adapter))
1924 dev_err(&adapter->pdev->dev,
1925 "payload offset should not an event number\n");
1926 return -1;
1927 } else {
1928 css = cso + skb->csum_offset;
1929
1930 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1931 TPD_PLOADOFFSET_SHIFT;
1932 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1933 TPD_CCSUM_OFFSET_SHIFT;
1934 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1935 }
1936 }
1937 return 0;
1938 }
1939
1940 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1941 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1942 enum atl1c_trans_queue type)
1943 {
1944 struct atl1c_tpd_desc *use_tpd = NULL;
1945 struct atl1c_buffer *buffer_info = NULL;
1946 u16 buf_len = skb_headlen(skb);
1947 u16 map_len = 0;
1948 u16 mapped_len = 0;
1949 u16 hdr_len = 0;
1950 u16 nr_frags;
1951 u16 f;
1952 int tso;
1953
1954 nr_frags = skb_shinfo(skb)->nr_frags;
1955 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1956 if (tso) {
1957 /* TSO */
1958 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1959 use_tpd = tpd;
1960
1961 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1962 buffer_info->length = map_len;
1963 buffer_info->dma = pci_map_single(adapter->pdev,
1964 skb->data, hdr_len, PCI_DMA_TODEVICE);
1965 buffer_info->state = ATL1_BUFFER_BUSY;
1966 mapped_len += map_len;
1967 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1968 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1969 }
1970
1971 if (mapped_len < buf_len) {
1972 /* mapped_len == 0, means we should use the first tpd,
1973 which is given by caller */
1974 if (mapped_len == 0)
1975 use_tpd = tpd;
1976 else {
1977 use_tpd = atl1c_get_tpd(adapter, type);
1978 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1979 use_tpd = atl1c_get_tpd(adapter, type);
1980 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1981 }
1982 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1983 buffer_info->length = buf_len - mapped_len;
1984 buffer_info->dma =
1985 pci_map_single(adapter->pdev, skb->data + mapped_len,
1986 buffer_info->length, PCI_DMA_TODEVICE);
1987 buffer_info->state = ATL1_BUFFER_BUSY;
1988
1989 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1990 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1991 }
1992
1993 for (f = 0; f < nr_frags; f++) {
1994 struct skb_frag_struct *frag;
1995
1996 frag = &skb_shinfo(skb)->frags[f];
1997
1998 use_tpd = atl1c_get_tpd(adapter, type);
1999 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2000
2001 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2002 buffer_info->length = frag->size;
2003 buffer_info->dma =
2004 pci_map_page(adapter->pdev, frag->page,
2005 frag->page_offset,
2006 buffer_info->length,
2007 PCI_DMA_TODEVICE);
2008 buffer_info->state = ATL1_BUFFER_BUSY;
2009
2010 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2011 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2012 }
2013
2014 /* The last tpd */
2015 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2016 /* The last buffer info contain the skb address,
2017 so it will be free after unmap */
2018 buffer_info->skb = skb;
2019 }
2020
2021 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2022 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2023 {
2024 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2025 u32 prod_data;
2026
2027 AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2028 switch (type) {
2029 case atl1c_trans_high:
2030 prod_data &= 0xFFFF0000;
2031 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2032 break;
2033 case atl1c_trans_normal:
2034 prod_data &= 0x0000FFFF;
2035 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2036 break;
2037 default:
2038 break;
2039 }
2040 wmb();
2041 AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2042 }
2043
2044 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2045 struct net_device *netdev)
2046 {
2047 struct atl1c_adapter *adapter = netdev_priv(netdev);
2048 unsigned long flags;
2049 u16 tpd_req = 1;
2050 struct atl1c_tpd_desc *tpd;
2051 enum atl1c_trans_queue type = atl1c_trans_normal;
2052
2053 if (test_bit(__AT_DOWN, &adapter->flags)) {
2054 dev_kfree_skb_any(skb);
2055 return NETDEV_TX_OK;
2056 }
2057
2058 tpd_req = atl1c_cal_tpd_req(skb);
2059 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2060 if (netif_msg_pktdata(adapter))
2061 dev_info(&adapter->pdev->dev, "tx locked\n");
2062 return NETDEV_TX_LOCKED;
2063 }
2064 if (skb->mark == 0x01)
2065 type = atl1c_trans_high;
2066 else
2067 type = atl1c_trans_normal;
2068
2069 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2070 /* no enough descriptor, just stop queue */
2071 netif_stop_queue(netdev);
2072 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2073 return NETDEV_TX_BUSY;
2074 }
2075
2076 tpd = atl1c_get_tpd(adapter, type);
2077
2078 /* do TSO and check sum */
2079 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2080 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2081 dev_kfree_skb_any(skb);
2082 return NETDEV_TX_OK;
2083 }
2084
2085 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2086 u16 vlan = vlan_tx_tag_get(skb);
2087 __le16 tag;
2088
2089 vlan = cpu_to_le16(vlan);
2090 AT_VLAN_TO_TAG(vlan, tag);
2091 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2092 tpd->vlan_tag = tag;
2093 }
2094
2095 if (skb_network_offset(skb) != ETH_HLEN)
2096 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2097
2098 atl1c_tx_map(adapter, skb, tpd, type);
2099 atl1c_tx_queue(adapter, skb, tpd, type);
2100
2101 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2102 return NETDEV_TX_OK;
2103 }
2104
2105 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2106 {
2107 struct net_device *netdev = adapter->netdev;
2108
2109 free_irq(adapter->pdev->irq, netdev);
2110
2111 if (adapter->have_msi)
2112 pci_disable_msi(adapter->pdev);
2113 }
2114
2115 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2116 {
2117 struct pci_dev *pdev = adapter->pdev;
2118 struct net_device *netdev = adapter->netdev;
2119 int flags = 0;
2120 int err = 0;
2121
2122 adapter->have_msi = true;
2123 err = pci_enable_msi(adapter->pdev);
2124 if (err) {
2125 if (netif_msg_ifup(adapter))
2126 dev_err(&pdev->dev,
2127 "Unable to allocate MSI interrupt Error: %d\n",
2128 err);
2129 adapter->have_msi = false;
2130 } else
2131 netdev->irq = pdev->irq;
2132
2133 if (!adapter->have_msi)
2134 flags |= IRQF_SHARED;
2135 err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2136 netdev->name, netdev);
2137 if (err) {
2138 if (netif_msg_ifup(adapter))
2139 dev_err(&pdev->dev,
2140 "Unable to allocate interrupt Error: %d\n",
2141 err);
2142 if (adapter->have_msi)
2143 pci_disable_msi(adapter->pdev);
2144 return err;
2145 }
2146 if (netif_msg_ifup(adapter))
2147 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2148 return err;
2149 }
2150
2151 int atl1c_up(struct atl1c_adapter *adapter)
2152 {
2153 struct net_device *netdev = adapter->netdev;
2154 int num;
2155 int err;
2156 int i;
2157
2158 netif_carrier_off(netdev);
2159 atl1c_init_ring_ptrs(adapter);
2160 atl1c_set_multi(netdev);
2161 atl1c_restore_vlan(adapter);
2162
2163 for (i = 0; i < adapter->num_rx_queues; i++) {
2164 num = atl1c_alloc_rx_buffer(adapter, i);
2165 if (unlikely(num == 0)) {
2166 err = -ENOMEM;
2167 goto err_alloc_rx;
2168 }
2169 }
2170
2171 if (atl1c_configure(adapter)) {
2172 err = -EIO;
2173 goto err_up;
2174 }
2175
2176 err = atl1c_request_irq(adapter);
2177 if (unlikely(err))
2178 goto err_up;
2179
2180 clear_bit(__AT_DOWN, &adapter->flags);
2181 napi_enable(&adapter->napi);
2182 atl1c_irq_enable(adapter);
2183 atl1c_check_link_status(adapter);
2184 netif_start_queue(netdev);
2185 return err;
2186
2187 err_up:
2188 err_alloc_rx:
2189 atl1c_clean_rx_ring(adapter);
2190 return err;
2191 }
2192
2193 void atl1c_down(struct atl1c_adapter *adapter)
2194 {
2195 struct net_device *netdev = adapter->netdev;
2196
2197 atl1c_del_timer(adapter);
2198 adapter->work_event = 0; /* clear all event */
2199 /* signal that we're down so the interrupt handler does not
2200 * reschedule our watchdog timer */
2201 set_bit(__AT_DOWN, &adapter->flags);
2202 netif_carrier_off(netdev);
2203 napi_disable(&adapter->napi);
2204 atl1c_irq_disable(adapter);
2205 atl1c_free_irq(adapter);
2206 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2207 /* reset MAC to disable all RX/TX */
2208 atl1c_reset_mac(&adapter->hw);
2209 msleep(1);
2210
2211 adapter->link_speed = SPEED_0;
2212 adapter->link_duplex = -1;
2213 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2214 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2215 atl1c_clean_rx_ring(adapter);
2216 }
2217
2218 /*
2219 * atl1c_open - Called when a network interface is made active
2220 * @netdev: network interface device structure
2221 *
2222 * Returns 0 on success, negative value on failure
2223 *
2224 * The open entry point is called when a network interface is made
2225 * active by the system (IFF_UP). At this point all resources needed
2226 * for transmit and receive operations are allocated, the interrupt
2227 * handler is registered with the OS, the watchdog timer is started,
2228 * and the stack is notified that the interface is ready.
2229 */
2230 static int atl1c_open(struct net_device *netdev)
2231 {
2232 struct atl1c_adapter *adapter = netdev_priv(netdev);
2233 int err;
2234
2235 /* disallow open during test */
2236 if (test_bit(__AT_TESTING, &adapter->flags))
2237 return -EBUSY;
2238
2239 /* allocate rx/tx dma buffer & descriptors */
2240 err = atl1c_setup_ring_resources(adapter);
2241 if (unlikely(err))
2242 return err;
2243
2244 err = atl1c_up(adapter);
2245 if (unlikely(err))
2246 goto err_up;
2247
2248 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2249 u32 phy_data;
2250
2251 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2252 phy_data |= MDIO_AP_EN;
2253 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2254 }
2255 return 0;
2256
2257 err_up:
2258 atl1c_free_irq(adapter);
2259 atl1c_free_ring_resources(adapter);
2260 atl1c_reset_mac(&adapter->hw);
2261 return err;
2262 }
2263
2264 /*
2265 * atl1c_close - Disables a network interface
2266 * @netdev: network interface device structure
2267 *
2268 * Returns 0, this is not allowed to fail
2269 *
2270 * The close entry point is called when an interface is de-activated
2271 * by the OS. The hardware is still under the drivers control, but
2272 * needs to be disabled. A global MAC reset is issued to stop the
2273 * hardware, and all transmit and receive resources are freed.
2274 */
2275 static int atl1c_close(struct net_device *netdev)
2276 {
2277 struct atl1c_adapter *adapter = netdev_priv(netdev);
2278
2279 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2280 atl1c_down(adapter);
2281 atl1c_free_ring_resources(adapter);
2282 return 0;
2283 }
2284
2285 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2286 {
2287 struct net_device *netdev = pci_get_drvdata(pdev);
2288 struct atl1c_adapter *adapter = netdev_priv(netdev);
2289 struct atl1c_hw *hw = &adapter->hw;
2290 u32 ctrl;
2291 u32 mac_ctrl_data;
2292 u32 master_ctrl_data;
2293 u32 wol_ctrl_data = 0;
2294 u16 mii_bmsr_data;
2295 u16 save_autoneg_advertised;
2296 u16 mii_intr_status_data;
2297 u32 wufc = adapter->wol;
2298 u32 i;
2299 int retval = 0;
2300
2301 if (netif_running(netdev)) {
2302 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2303 atl1c_down(adapter);
2304 }
2305 netif_device_detach(netdev);
2306 atl1c_disable_l0s_l1(hw);
2307 retval = pci_save_state(pdev);
2308 if (retval)
2309 return retval;
2310 if (wufc) {
2311 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2312 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2313
2314 /* get link status */
2315 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2316 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2317 save_autoneg_advertised = hw->autoneg_advertised;
2318 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2319 if (atl1c_restart_autoneg(hw) != 0)
2320 if (netif_msg_link(adapter))
2321 dev_warn(&pdev->dev, "phy autoneg failed\n");
2322 hw->phy_configured = false; /* re-init PHY when resume */
2323 hw->autoneg_advertised = save_autoneg_advertised;
2324 /* turn on magic packet wol */
2325 if (wufc & AT_WUFC_MAG)
2326 wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2327
2328 if (wufc & AT_WUFC_LNKC) {
2329 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2330 msleep(100);
2331 atl1c_read_phy_reg(hw, MII_BMSR,
2332 (u16 *)&mii_bmsr_data);
2333 if (mii_bmsr_data & BMSR_LSTATUS)
2334 break;
2335 }
2336 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2337 if (netif_msg_link(adapter))
2338 dev_warn(&pdev->dev,
2339 "%s: Link may change"
2340 "when suspend\n",
2341 atl1c_driver_name);
2342 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2343 /* only link up can wake up */
2344 if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2345 if (netif_msg_link(adapter))
2346 dev_err(&pdev->dev,
2347 "%s: read write phy "
2348 "register failed.\n",
2349 atl1c_driver_name);
2350 goto wol_dis;
2351 }
2352 }
2353 /* clear phy interrupt */
2354 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2355 /* Config MAC Ctrl register */
2356 mac_ctrl_data = MAC_CTRL_RX_EN;
2357 /* set to 10/100M halt duplex */
2358 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2359 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2360 MAC_CTRL_PRMLEN_MASK) <<
2361 MAC_CTRL_PRMLEN_SHIFT);
2362
2363 if (adapter->vlgrp)
2364 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2365
2366 /* magic packet maybe Broadcast&multicast&Unicast frame */
2367 if (wufc & AT_WUFC_MAG)
2368 mac_ctrl_data |= MAC_CTRL_BC_EN;
2369
2370 if (netif_msg_hw(adapter))
2371 dev_dbg(&pdev->dev,
2372 "%s: suspend MAC=0x%x\n",
2373 atl1c_driver_name, mac_ctrl_data);
2374 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2375 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2376 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2377
2378 /* pcie patch */
2379 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2380 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2381 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2382
2383 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2384 goto suspend_exit;
2385 }
2386 wol_dis:
2387
2388 /* WOL disabled */
2389 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2390
2391 /* pcie patch */
2392 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2393 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2394 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2395
2396 atl1c_phy_disable(hw);
2397 hw->phy_configured = false; /* re-init PHY when resume */
2398
2399 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2400 suspend_exit:
2401
2402 pci_disable_device(pdev);
2403 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2404
2405 return 0;
2406 }
2407
2408 static int atl1c_resume(struct pci_dev *pdev)
2409 {
2410 struct net_device *netdev = pci_get_drvdata(pdev);
2411 struct atl1c_adapter *adapter = netdev_priv(netdev);
2412
2413 pci_set_power_state(pdev, PCI_D0);
2414 pci_restore_state(pdev);
2415 pci_enable_wake(pdev, PCI_D3hot, 0);
2416 pci_enable_wake(pdev, PCI_D3cold, 0);
2417
2418 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2419
2420 atl1c_phy_reset(&adapter->hw);
2421 atl1c_reset_mac(&adapter->hw);
2422 netif_device_attach(netdev);
2423 if (netif_running(netdev))
2424 atl1c_up(adapter);
2425
2426 return 0;
2427 }
2428
2429 static void atl1c_shutdown(struct pci_dev *pdev)
2430 {
2431 atl1c_suspend(pdev, PMSG_SUSPEND);
2432 }
2433
2434 static const struct net_device_ops atl1c_netdev_ops = {
2435 .ndo_open = atl1c_open,
2436 .ndo_stop = atl1c_close,
2437 .ndo_validate_addr = eth_validate_addr,
2438 .ndo_start_xmit = atl1c_xmit_frame,
2439 .ndo_set_mac_address = atl1c_set_mac_addr,
2440 .ndo_set_multicast_list = atl1c_set_multi,
2441 .ndo_change_mtu = atl1c_change_mtu,
2442 .ndo_do_ioctl = atl1c_ioctl,
2443 .ndo_tx_timeout = atl1c_tx_timeout,
2444 .ndo_get_stats = atl1c_get_stats,
2445 .ndo_vlan_rx_register = atl1c_vlan_rx_register,
2446 #ifdef CONFIG_NET_POLL_CONTROLLER
2447 .ndo_poll_controller = atl1c_netpoll,
2448 #endif
2449 };
2450
2451 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2452 {
2453 SET_NETDEV_DEV(netdev, &pdev->dev);
2454 pci_set_drvdata(pdev, netdev);
2455
2456 netdev->irq = pdev->irq;
2457 netdev->netdev_ops = &atl1c_netdev_ops;
2458 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2459 atl1c_set_ethtool_ops(netdev);
2460
2461 /* TODO: add when ready */
2462 netdev->features = NETIF_F_SG |
2463 NETIF_F_HW_CSUM |
2464 NETIF_F_HW_VLAN_TX |
2465 NETIF_F_HW_VLAN_RX |
2466 NETIF_F_TSO |
2467 NETIF_F_TSO6;
2468 return 0;
2469 }
2470
2471 /*
2472 * atl1c_probe - Device Initialization Routine
2473 * @pdev: PCI device information struct
2474 * @ent: entry in atl1c_pci_tbl
2475 *
2476 * Returns 0 on success, negative on failure
2477 *
2478 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2479 * The OS initialization, configuring of the adapter private structure,
2480 * and a hardware reset occur.
2481 */
2482 static int __devinit atl1c_probe(struct pci_dev *pdev,
2483 const struct pci_device_id *ent)
2484 {
2485 struct net_device *netdev;
2486 struct atl1c_adapter *adapter;
2487 static int cards_found;
2488
2489 int err = 0;
2490
2491 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2492 err = pci_enable_device_mem(pdev);
2493 if (err) {
2494 dev_err(&pdev->dev, "cannot enable PCI device\n");
2495 return err;
2496 }
2497
2498 /*
2499 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2500 * shared register for the high 32 bits, so only a single, aligned,
2501 * 4 GB physical address range can be used at a time.
2502 *
2503 * Supporting 64-bit DMA on this hardware is more trouble than it's
2504 * worth. It is far easier to limit to 32-bit DMA than update
2505 * various kernel subsystems to support the mechanics required by a
2506 * fixed-high-32-bit system.
2507 */
2508 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2509 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2510 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2511 goto err_dma;
2512 }
2513
2514 err = pci_request_regions(pdev, atl1c_driver_name);
2515 if (err) {
2516 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2517 goto err_pci_reg;
2518 }
2519
2520 pci_set_master(pdev);
2521
2522 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2523 if (netdev == NULL) {
2524 err = -ENOMEM;
2525 dev_err(&pdev->dev, "etherdev alloc failed\n");
2526 goto err_alloc_etherdev;
2527 }
2528
2529 err = atl1c_init_netdev(netdev, pdev);
2530 if (err) {
2531 dev_err(&pdev->dev, "init netdevice failed\n");
2532 goto err_init_netdev;
2533 }
2534 adapter = netdev_priv(netdev);
2535 adapter->bd_number = cards_found;
2536 adapter->netdev = netdev;
2537 adapter->pdev = pdev;
2538 adapter->hw.adapter = adapter;
2539 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2540 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2541 if (!adapter->hw.hw_addr) {
2542 err = -EIO;
2543 dev_err(&pdev->dev, "cannot map device registers\n");
2544 goto err_ioremap;
2545 }
2546 netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2547
2548 /* init mii data */
2549 adapter->mii.dev = netdev;
2550 adapter->mii.mdio_read = atl1c_mdio_read;
2551 adapter->mii.mdio_write = atl1c_mdio_write;
2552 adapter->mii.phy_id_mask = 0x1f;
2553 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2554 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2555 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2556 (unsigned long)adapter);
2557 /* setup the private structure */
2558 err = atl1c_sw_init(adapter);
2559 if (err) {
2560 dev_err(&pdev->dev, "net device private data init failed\n");
2561 goto err_sw_init;
2562 }
2563 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2564 ATL1C_PCIE_PHY_RESET);
2565
2566 /* Init GPHY as early as possible due to power saving issue */
2567 atl1c_phy_reset(&adapter->hw);
2568
2569 err = atl1c_reset_mac(&adapter->hw);
2570 if (err) {
2571 err = -EIO;
2572 goto err_reset;
2573 }
2574
2575 device_init_wakeup(&pdev->dev, 1);
2576 /* reset the controller to
2577 * put the device in a known good starting state */
2578 err = atl1c_phy_init(&adapter->hw);
2579 if (err) {
2580 err = -EIO;
2581 goto err_reset;
2582 }
2583 if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2584 err = -EIO;
2585 dev_err(&pdev->dev, "get mac address failed\n");
2586 goto err_eeprom;
2587 }
2588 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2589 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2590 if (netif_msg_probe(adapter))
2591 dev_dbg(&pdev->dev,
2592 "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2593 adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2594 adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2595 adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2596
2597 atl1c_hw_set_mac_addr(&adapter->hw);
2598 INIT_WORK(&adapter->common_task, atl1c_common_task);
2599 adapter->work_event = 0;
2600 err = register_netdev(netdev);
2601 if (err) {
2602 dev_err(&pdev->dev, "register netdevice failed\n");
2603 goto err_register;
2604 }
2605
2606 if (netif_msg_probe(adapter))
2607 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2608 cards_found++;
2609 return 0;
2610
2611 err_reset:
2612 err_register:
2613 err_sw_init:
2614 err_eeprom:
2615 iounmap(adapter->hw.hw_addr);
2616 err_init_netdev:
2617 err_ioremap:
2618 free_netdev(netdev);
2619 err_alloc_etherdev:
2620 pci_release_regions(pdev);
2621 err_pci_reg:
2622 err_dma:
2623 pci_disable_device(pdev);
2624 return err;
2625 }
2626
2627 /*
2628 * atl1c_remove - Device Removal Routine
2629 * @pdev: PCI device information struct
2630 *
2631 * atl1c_remove is called by the PCI subsystem to alert the driver
2632 * that it should release a PCI device. The could be caused by a
2633 * Hot-Plug event, or because the driver is going to be removed from
2634 * memory.
2635 */
2636 static void __devexit atl1c_remove(struct pci_dev *pdev)
2637 {
2638 struct net_device *netdev = pci_get_drvdata(pdev);
2639 struct atl1c_adapter *adapter = netdev_priv(netdev);
2640
2641 unregister_netdev(netdev);
2642 atl1c_phy_disable(&adapter->hw);
2643
2644 iounmap(adapter->hw.hw_addr);
2645
2646 pci_release_regions(pdev);
2647 pci_disable_device(pdev);
2648 free_netdev(netdev);
2649 }
2650
2651 /*
2652 * atl1c_io_error_detected - called when PCI error is detected
2653 * @pdev: Pointer to PCI device
2654 * @state: The current pci connection state
2655 *
2656 * This function is called after a PCI bus error affecting
2657 * this device has been detected.
2658 */
2659 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2660 pci_channel_state_t state)
2661 {
2662 struct net_device *netdev = pci_get_drvdata(pdev);
2663 struct atl1c_adapter *adapter = netdev_priv(netdev);
2664
2665 netif_device_detach(netdev);
2666
2667 if (state == pci_channel_io_perm_failure)
2668 return PCI_ERS_RESULT_DISCONNECT;
2669
2670 if (netif_running(netdev))
2671 atl1c_down(adapter);
2672
2673 pci_disable_device(pdev);
2674
2675 /* Request a slot slot reset. */
2676 return PCI_ERS_RESULT_NEED_RESET;
2677 }
2678
2679 /*
2680 * atl1c_io_slot_reset - called after the pci bus has been reset.
2681 * @pdev: Pointer to PCI device
2682 *
2683 * Restart the card from scratch, as if from a cold-boot. Implementation
2684 * resembles the first-half of the e1000_resume routine.
2685 */
2686 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2687 {
2688 struct net_device *netdev = pci_get_drvdata(pdev);
2689 struct atl1c_adapter *adapter = netdev_priv(netdev);
2690
2691 if (pci_enable_device(pdev)) {
2692 if (netif_msg_hw(adapter))
2693 dev_err(&pdev->dev,
2694 "Cannot re-enable PCI device after reset\n");
2695 return PCI_ERS_RESULT_DISCONNECT;
2696 }
2697 pci_set_master(pdev);
2698
2699 pci_enable_wake(pdev, PCI_D3hot, 0);
2700 pci_enable_wake(pdev, PCI_D3cold, 0);
2701
2702 atl1c_reset_mac(&adapter->hw);
2703
2704 return PCI_ERS_RESULT_RECOVERED;
2705 }
2706
2707 /*
2708 * atl1c_io_resume - called when traffic can start flowing again.
2709 * @pdev: Pointer to PCI device
2710 *
2711 * This callback is called when the error recovery driver tells us that
2712 * its OK to resume normal operation. Implementation resembles the
2713 * second-half of the atl1c_resume routine.
2714 */
2715 static void atl1c_io_resume(struct pci_dev *pdev)
2716 {
2717 struct net_device *netdev = pci_get_drvdata(pdev);
2718 struct atl1c_adapter *adapter = netdev_priv(netdev);
2719
2720 if (netif_running(netdev)) {
2721 if (atl1c_up(adapter)) {
2722 if (netif_msg_hw(adapter))
2723 dev_err(&pdev->dev,
2724 "Cannot bring device back up after reset\n");
2725 return;
2726 }
2727 }
2728
2729 netif_device_attach(netdev);
2730 }
2731
2732 static struct pci_error_handlers atl1c_err_handler = {
2733 .error_detected = atl1c_io_error_detected,
2734 .slot_reset = atl1c_io_slot_reset,
2735 .resume = atl1c_io_resume,
2736 };
2737
2738 static struct pci_driver atl1c_driver = {
2739 .name = atl1c_driver_name,
2740 .id_table = atl1c_pci_tbl,
2741 .probe = atl1c_probe,
2742 .remove = __devexit_p(atl1c_remove),
2743 /* Power Managment Hooks */
2744 .suspend = atl1c_suspend,
2745 .resume = atl1c_resume,
2746 .shutdown = atl1c_shutdown,
2747 .err_handler = &atl1c_err_handler
2748 };
2749
2750 /*
2751 * atl1c_init_module - Driver Registration Routine
2752 *
2753 * atl1c_init_module is the first routine called when the driver is
2754 * loaded. All it does is register with the PCI subsystem.
2755 */
2756 static int __init atl1c_init_module(void)
2757 {
2758 return pci_register_driver(&atl1c_driver);
2759 }
2760
2761 /*
2762 * atl1c_exit_module - Driver Exit Cleanup Routine
2763 *
2764 * atl1c_exit_module is called just before the driver is removed
2765 * from memory.
2766 */
2767 static void __exit atl1c_exit_module(void)
2768 {
2769 pci_unregister_driver(&atl1c_driver);
2770 }
2771
2772 module_init(atl1c_init_module);
2773 module_exit(atl1c_exit_module);
kernels