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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / net / atl1c / atl1c_main.c
blob1372e9a99f5b29eb8e92aefc39404234977ceae0
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
202 WARN_ON(in_interrupt());
203 atl1c_down(adapter);
204 atl1c_up(adapter);
205 clear_bit(__AT_RESETTING, &adapter->flags);
206 }
207
208 static void atl1c_reset_task(struct work_struct *work)
209 {
210 struct atl1c_adapter *adapter;
211 struct net_device *netdev;
212
213 adapter = container_of(work, struct atl1c_adapter, reset_task);
214 netdev = adapter->netdev;
215
216 netif_device_detach(netdev);
217 atl1c_down(adapter);
218 atl1c_up(adapter);
219 netif_device_attach(netdev);
220 }
221
222 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
223 {
224 struct atl1c_hw *hw = &adapter->hw;
225 struct net_device *netdev = adapter->netdev;
226 struct pci_dev *pdev = adapter->pdev;
227 int err;
228 unsigned long flags;
229 u16 speed, duplex, phy_data;
230
231 spin_lock_irqsave(&adapter->mdio_lock, flags);
232 /* MII_BMSR must read twise */
233 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
234 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
235 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
236
237 if ((phy_data & BMSR_LSTATUS) == 0) {
238 /* link down */
239 if (netif_carrier_ok(netdev)) {
240 hw->hibernate = true;
241 if (atl1c_stop_mac(hw) != 0)
242 if (netif_msg_hw(adapter))
243 dev_warn(&pdev->dev,
244 "stop mac failed\n");
245 atl1c_set_aspm(hw, false);
246 }
247 netif_carrier_off(netdev);
248 } else {
249 /* Link Up */
250 hw->hibernate = false;
251 spin_lock_irqsave(&adapter->mdio_lock, flags);
252 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
253 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
254 if (unlikely(err))
255 return;
256 /* link result is our setting */
257 if (adapter->link_speed != speed ||
258 adapter->link_duplex != duplex) {
259 adapter->link_speed = speed;
260 adapter->link_duplex = duplex;
261 atl1c_set_aspm(hw, true);
262 atl1c_enable_tx_ctrl(hw);
263 atl1c_enable_rx_ctrl(hw);
264 atl1c_setup_mac_ctrl(adapter);
265 if (netif_msg_link(adapter))
266 dev_info(&pdev->dev,
267 "%s: %s NIC Link is Up<%d Mbps %s>\n",
268 atl1c_driver_name, netdev->name,
269 adapter->link_speed,
270 adapter->link_duplex == FULL_DUPLEX ?
271 "Full Duplex" : "Half Duplex");
272 }
273 if (!netif_carrier_ok(netdev))
274 netif_carrier_on(netdev);
275 }
276 }
277
278 /*
279 * atl1c_link_chg_task - deal with link change event Out of interrupt context
280 * @netdev: network interface device structure
281 */
282 static void atl1c_link_chg_task(struct work_struct *work)
283 {
284 struct atl1c_adapter *adapter;
285
286 adapter = container_of(work, struct atl1c_adapter, link_chg_task);
287 atl1c_check_link_status(adapter);
288 }
289
290 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
291 {
292 struct net_device *netdev = adapter->netdev;
293 struct pci_dev *pdev = adapter->pdev;
294 u16 phy_data;
295 u16 link_up;
296
297 spin_lock(&adapter->mdio_lock);
298 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
299 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
300 spin_unlock(&adapter->mdio_lock);
301 link_up = phy_data & BMSR_LSTATUS;
302 /* notify upper layer link down ASAP */
303 if (!link_up) {
304 if (netif_carrier_ok(netdev)) {
305 /* old link state: Up */
306 netif_carrier_off(netdev);
307 if (netif_msg_link(adapter))
308 dev_info(&pdev->dev,
309 "%s: %s NIC Link is Down\n",
310 atl1c_driver_name, netdev->name);
311 adapter->link_speed = SPEED_0;
312 }
313 }
314 schedule_work(&adapter->link_chg_task);
315 }
316
317 static void atl1c_del_timer(struct atl1c_adapter *adapter)
318 {
319 del_timer_sync(&adapter->phy_config_timer);
320 }
321
322 static void atl1c_cancel_work(struct atl1c_adapter *adapter)
323 {
324 cancel_work_sync(&adapter->reset_task);
325 cancel_work_sync(&adapter->link_chg_task);
326 }
327
328 /*
329 * atl1c_tx_timeout - Respond to a Tx Hang
330 * @netdev: network interface device structure
331 */
332 static void atl1c_tx_timeout(struct net_device *netdev)
333 {
334 struct atl1c_adapter *adapter = netdev_priv(netdev);
335
336 /* Do the reset outside of interrupt context */
337 schedule_work(&adapter->reset_task);
338 }
339
340 /*
341 * atl1c_set_multi - Multicast and Promiscuous mode set
342 * @netdev: network interface device structure
343 *
344 * The set_multi entry point is called whenever the multicast address
345 * list or the network interface flags are updated. This routine is
346 * responsible for configuring the hardware for proper multicast,
347 * promiscuous mode, and all-multi behavior.
348 */
349 static void atl1c_set_multi(struct net_device *netdev)
350 {
351 struct atl1c_adapter *adapter = netdev_priv(netdev);
352 struct atl1c_hw *hw = &adapter->hw;
353 struct dev_mc_list *mc_ptr;
354 u32 mac_ctrl_data;
355 u32 hash_value;
356
357 /* Check for Promiscuous and All Multicast modes */
358 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
359
360 if (netdev->flags & IFF_PROMISC) {
361 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
362 } else if (netdev->flags & IFF_ALLMULTI) {
363 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
364 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
365 } else {
366 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
367 }
368
369 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
370
371 /* clear the old settings from the multicast hash table */
372 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
373 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
374
375 /* comoute mc addresses' hash value ,and put it into hash table */
376 for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
377 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
378 atl1c_hash_set(hw, hash_value);
379 }
380 }
381
382 static void atl1c_vlan_rx_register(struct net_device *netdev,
383 struct vlan_group *grp)
384 {
385 struct atl1c_adapter *adapter = netdev_priv(netdev);
386 struct pci_dev *pdev = adapter->pdev;
387 u32 mac_ctrl_data = 0;
388
389 if (netif_msg_pktdata(adapter))
390 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
391
392 atl1c_irq_disable(adapter);
393
394 adapter->vlgrp = grp;
395 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
396
397 if (grp) {
398 /* enable VLAN tag insert/strip */
399 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
400 } else {
401 /* disable VLAN tag insert/strip */
402 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
403 }
404
405 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
406 atl1c_irq_enable(adapter);
407 }
408
409 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
410 {
411 struct pci_dev *pdev = adapter->pdev;
412
413 if (netif_msg_pktdata(adapter))
414 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
415 atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
416 }
417 /*
418 * atl1c_set_mac - Change the Ethernet Address of the NIC
419 * @netdev: network interface device structure
420 * @p: pointer to an address structure
421 *
422 * Returns 0 on success, negative on failure
423 */
424 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
425 {
426 struct atl1c_adapter *adapter = netdev_priv(netdev);
427 struct sockaddr *addr = p;
428
429 if (!is_valid_ether_addr(addr->sa_data))
430 return -EADDRNOTAVAIL;
431
432 if (netif_running(netdev))
433 return -EBUSY;
434
435 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
436 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
437
438 atl1c_hw_set_mac_addr(&adapter->hw);
439
440 return 0;
441 }
442
443 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
444 struct net_device *dev)
445 {
446 int mtu = dev->mtu;
447
448 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
449 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
450 }
451 /*
452 * atl1c_change_mtu - Change the Maximum Transfer Unit
453 * @netdev: network interface device structure
454 * @new_mtu: new value for maximum frame size
455 *
456 * Returns 0 on success, negative on failure
457 */
458 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
459 {
460 struct atl1c_adapter *adapter = netdev_priv(netdev);
461 int old_mtu = netdev->mtu;
462 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
463
464 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
465 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
466 if (netif_msg_link(adapter))
467 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
468 return -EINVAL;
469 }
470 /* set MTU */
471 if (old_mtu != new_mtu && netif_running(netdev)) {
472 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
473 msleep(1);
474 netdev->mtu = new_mtu;
475 adapter->hw.max_frame_size = new_mtu;
476 atl1c_set_rxbufsize(adapter, netdev);
477 atl1c_down(adapter);
478 atl1c_up(adapter);
479 clear_bit(__AT_RESETTING, &adapter->flags);
480 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
481 u32 phy_data;
482
483 AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
484 phy_data |= 0x10000000;
485 AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
486 }
487
488 }
489 return 0;
490 }
491
492 /*
493 * caller should hold mdio_lock
494 */
495 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
496 {
497 struct atl1c_adapter *adapter = netdev_priv(netdev);
498 u16 result;
499
500 atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
501 return result;
502 }
503
504 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
505 int reg_num, int val)
506 {
507 struct atl1c_adapter *adapter = netdev_priv(netdev);
508
509 atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
510 }
511
512 /*
513 * atl1c_mii_ioctl -
514 * @netdev:
515 * @ifreq:
516 * @cmd:
517 */
518 static int atl1c_mii_ioctl(struct net_device *netdev,
519 struct ifreq *ifr, int cmd)
520 {
521 struct atl1c_adapter *adapter = netdev_priv(netdev);
522 struct pci_dev *pdev = adapter->pdev;
523 struct mii_ioctl_data *data = if_mii(ifr);
524 unsigned long flags;
525 int retval = 0;
526
527 if (!netif_running(netdev))
528 return -EINVAL;
529
530 spin_lock_irqsave(&adapter->mdio_lock, flags);
531 switch (cmd) {
532 case SIOCGMIIPHY:
533 data->phy_id = 0;
534 break;
535
536 case SIOCGMIIREG:
537 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
538 &data->val_out)) {
539 retval = -EIO;
540 goto out;
541 }
542 break;
543
544 case SIOCSMIIREG:
545 if (data->reg_num & ~(0x1F)) {
546 retval = -EFAULT;
547 goto out;
548 }
549
550 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
551 data->reg_num, data->val_in);
552 if (atl1c_write_phy_reg(&adapter->hw,
553 data->reg_num, data->val_in)) {
554 retval = -EIO;
555 goto out;
556 }
557 break;
558
559 default:
560 retval = -EOPNOTSUPP;
561 break;
562 }
563 out:
564 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
565 return retval;
566 }
567
568 /*
569 * atl1c_ioctl -
570 * @netdev:
571 * @ifreq:
572 * @cmd:
573 */
574 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
575 {
576 switch (cmd) {
577 case SIOCGMIIPHY:
578 case SIOCGMIIREG:
579 case SIOCSMIIREG:
580 return atl1c_mii_ioctl(netdev, ifr, cmd);
581 default:
582 return -EOPNOTSUPP;
583 }
584 }
585
586 /*
587 * atl1c_alloc_queues - Allocate memory for all rings
588 * @adapter: board private structure to initialize
589 *
590 */
591 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
592 {
593 return 0;
594 }
595
596 static void atl1c_set_mac_type(struct atl1c_hw *hw)
597 {
598 switch (hw->device_id) {
599 case PCI_DEVICE_ID_ATTANSIC_L2C:
600 hw->nic_type = athr_l2c;
601 break;
602
603 case PCI_DEVICE_ID_ATTANSIC_L1C:
604 hw->nic_type = athr_l1c;
605 break;
606
607 default:
608 break;
609 }
610 }
611
612 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
613 {
614 u32 phy_status_data;
615 u32 link_ctrl_data;
616
617 atl1c_set_mac_type(hw);
618 AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
619 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
620
621 hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
622 ATL1C_INTR_MODRT_ENABLE |
623 ATL1C_RX_IPV6_CHKSUM |
624 ATL1C_TXQ_MODE_ENHANCE;
625 if (link_ctrl_data & LINK_CTRL_L0S_EN)
626 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
627 if (link_ctrl_data & LINK_CTRL_L1_EN)
628 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
629
630 if (hw->nic_type == athr_l1c) {
631 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
632 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
633 }
634 return 0;
635 }
636 /*
637 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
638 * @adapter: board private structure to initialize
639 *
640 * atl1c_sw_init initializes the Adapter private data structure.
641 * Fields are initialized based on PCI device information and
642 * OS network device settings (MTU size).
643 */
644 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
645 {
646 struct atl1c_hw *hw = &adapter->hw;
647 struct pci_dev *pdev = adapter->pdev;
648
649 adapter->wol = 0;
650 adapter->link_speed = SPEED_0;
651 adapter->link_duplex = FULL_DUPLEX;
652 adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
653 adapter->tpd_ring[0].count = 1024;
654 adapter->rfd_ring[0].count = 512;
655
656 hw->vendor_id = pdev->vendor;
657 hw->device_id = pdev->device;
658 hw->subsystem_vendor_id = pdev->subsystem_vendor;
659 hw->subsystem_id = pdev->subsystem_device;
660
661 /* before link up, we assume hibernate is true */
662 hw->hibernate = true;
663 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
664 if (atl1c_setup_mac_funcs(hw) != 0) {
665 dev_err(&pdev->dev, "set mac function pointers failed\n");
666 return -1;
667 }
668 hw->intr_mask = IMR_NORMAL_MASK;
669 hw->phy_configured = false;
670 hw->preamble_len = 7;
671 hw->max_frame_size = adapter->netdev->mtu;
672 if (adapter->num_rx_queues < 2) {
673 hw->rss_type = atl1c_rss_disable;
674 hw->rss_mode = atl1c_rss_mode_disable;
675 } else {
676 hw->rss_type = atl1c_rss_ipv4;
677 hw->rss_mode = atl1c_rss_mul_que_mul_int;
678 hw->rss_hash_bits = 16;
679 }
680 hw->autoneg_advertised = ADVERTISED_Autoneg;
681 hw->indirect_tab = 0xE4E4E4E4;
682 hw->base_cpu = 0;
683
684 hw->ict = 50000; /* 100ms */
685 hw->smb_timer = 200000; /* 400ms */
686 hw->cmb_tpd = 4;
687 hw->cmb_tx_timer = 1; /* 2 us */
688 hw->rx_imt = 200;
689 hw->tx_imt = 1000;
690
691 hw->tpd_burst = 5;
692 hw->rfd_burst = 8;
693 hw->dma_order = atl1c_dma_ord_out;
694 hw->dmar_block = atl1c_dma_req_1024;
695 hw->dmaw_block = atl1c_dma_req_1024;
696 hw->dmar_dly_cnt = 15;
697 hw->dmaw_dly_cnt = 4;
698
699 if (atl1c_alloc_queues(adapter)) {
700 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
701 return -ENOMEM;
702 }
703 /* TODO */
704 atl1c_set_rxbufsize(adapter, adapter->netdev);
705 atomic_set(&adapter->irq_sem, 1);
706 spin_lock_init(&adapter->mdio_lock);
707 spin_lock_init(&adapter->tx_lock);
708 set_bit(__AT_DOWN, &adapter->flags);
709
710 return 0;
711 }
712
713 /*
714 * atl1c_clean_tx_ring - Free Tx-skb
715 * @adapter: board private structure
716 */
717 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
718 enum atl1c_trans_queue type)
719 {
720 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
721 struct atl1c_buffer *buffer_info;
722 struct pci_dev *pdev = adapter->pdev;
723 u16 index, ring_count;
724
725 ring_count = tpd_ring->count;
726 for (index = 0; index < ring_count; index++) {
727 buffer_info = &tpd_ring->buffer_info[index];
728 if (buffer_info->state == ATL1_BUFFER_FREE)
729 continue;
730 if (buffer_info->dma)
731 pci_unmap_single(pdev, buffer_info->dma,
732 buffer_info->length,
733 PCI_DMA_TODEVICE);
734 if (buffer_info->skb)
735 dev_kfree_skb(buffer_info->skb);
736 buffer_info->dma = 0;
737 buffer_info->skb = NULL;
738 buffer_info->state = ATL1_BUFFER_FREE;
739 }
740
741 /* Zero out Tx-buffers */
742 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
743 ring_count);
744 atomic_set(&tpd_ring->next_to_clean, 0);
745 tpd_ring->next_to_use = 0;
746 }
747
748 /*
749 * atl1c_clean_rx_ring - Free rx-reservation skbs
750 * @adapter: board private structure
751 */
752 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
753 {
754 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
755 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
756 struct atl1c_buffer *buffer_info;
757 struct pci_dev *pdev = adapter->pdev;
758 int i, j;
759
760 for (i = 0; i < adapter->num_rx_queues; i++) {
761 for (j = 0; j < rfd_ring[i].count; j++) {
762 buffer_info = &rfd_ring[i].buffer_info[j];
763 if (buffer_info->state == ATL1_BUFFER_FREE)
764 continue;
765 if (buffer_info->dma)
766 pci_unmap_single(pdev, buffer_info->dma,
767 buffer_info->length,
768 PCI_DMA_FROMDEVICE);
769 if (buffer_info->skb)
770 dev_kfree_skb(buffer_info->skb);
771 buffer_info->state = ATL1_BUFFER_FREE;
772 buffer_info->skb = NULL;
773 }
774 /* zero out the descriptor ring */
775 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
776 rfd_ring[i].next_to_clean = 0;
777 rfd_ring[i].next_to_use = 0;
778 rrd_ring[i].next_to_use = 0;
779 rrd_ring[i].next_to_clean = 0;
780 }
781 }
782
783 /*
784 * Read / Write Ptr Initialize:
785 */
786 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
787 {
788 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
789 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
790 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
791 struct atl1c_buffer *buffer_info;
792 int i, j;
793
794 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
795 tpd_ring[i].next_to_use = 0;
796 atomic_set(&tpd_ring[i].next_to_clean, 0);
797 buffer_info = tpd_ring[i].buffer_info;
798 for (j = 0; j < tpd_ring->count; j++)
799 buffer_info[i].state = ATL1_BUFFER_FREE;
800 }
801 for (i = 0; i < adapter->num_rx_queues; i++) {
802 rfd_ring[i].next_to_use = 0;
803 rfd_ring[i].next_to_clean = 0;
804 rrd_ring[i].next_to_use = 0;
805 rrd_ring[i].next_to_clean = 0;
806 for (j = 0; j < rfd_ring[i].count; j++) {
807 buffer_info = &rfd_ring[i].buffer_info[j];
808 buffer_info->state = ATL1_BUFFER_FREE;
809 }
810 }
811 }
812
813 /*
814 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
815 * @adapter: board private structure
816 *
817 * Free all transmit software resources
818 */
819 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
820 {
821 struct pci_dev *pdev = adapter->pdev;
822
823 pci_free_consistent(pdev, adapter->ring_header.size,
824 adapter->ring_header.desc,
825 adapter->ring_header.dma);
826 adapter->ring_header.desc = NULL;
827
828 /* Note: just free tdp_ring.buffer_info,
829 * it contain rfd_ring.buffer_info, do not double free */
830 if (adapter->tpd_ring[0].buffer_info) {
831 kfree(adapter->tpd_ring[0].buffer_info);
832 adapter->tpd_ring[0].buffer_info = NULL;
833 }
834 }
835
836 /*
837 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
838 * @adapter: board private structure
839 *
840 * Return 0 on success, negative on failure
841 */
842 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
843 {
844 struct pci_dev *pdev = adapter->pdev;
845 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
846 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
847 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
848 struct atl1c_ring_header *ring_header = &adapter->ring_header;
849 int num_rx_queues = adapter->num_rx_queues;
850 int size;
851 int i;
852 int count = 0;
853 int rx_desc_count = 0;
854 u32 offset = 0;
855
856 rrd_ring[0].count = rfd_ring[0].count;
857 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
858 tpd_ring[i].count = tpd_ring[0].count;
859
860 for (i = 1; i < adapter->num_rx_queues; i++)
861 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
862
863 /* 2 tpd queue, one high priority queue,
864 * another normal priority queue */
865 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
866 rfd_ring->count * num_rx_queues);
867 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
868 if (unlikely(!tpd_ring->buffer_info)) {
869 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
870 size);
871 goto err_nomem;
872 }
873 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
874 tpd_ring[i].buffer_info =
875 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
876 count += tpd_ring[i].count;
877 }
878
879 for (i = 0; i < num_rx_queues; i++) {
880 rfd_ring[i].buffer_info =
881 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
882 count += rfd_ring[i].count;
883 rx_desc_count += rfd_ring[i].count;
884 }
885 /*
886 * real ring DMA buffer
887 * each ring/block may need up to 8 bytes for alignment, hence the
888 * additional bytes tacked onto the end.
889 */
890 ring_header->size = size =
891 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
892 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
893 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
894 sizeof(struct atl1c_hw_stats) +
895 8 * 4 + 8 * 2 * num_rx_queues;
896
897 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
898 &ring_header->dma);
899 if (unlikely(!ring_header->desc)) {
900 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
901 goto err_nomem;
902 }
903 memset(ring_header->desc, 0, ring_header->size);
904 /* init TPD ring */
905
906 tpd_ring[0].dma = roundup(ring_header->dma, 8);
907 offset = tpd_ring[0].dma - ring_header->dma;
908 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
909 tpd_ring[i].dma = ring_header->dma + offset;
910 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
911 tpd_ring[i].size =
912 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
913 offset += roundup(tpd_ring[i].size, 8);
914 }
915 /* init RFD ring */
916 for (i = 0; i < num_rx_queues; i++) {
917 rfd_ring[i].dma = ring_header->dma + offset;
918 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
919 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
920 rfd_ring[i].count;
921 offset += roundup(rfd_ring[i].size, 8);
922 }
923
924 /* init RRD ring */
925 for (i = 0; i < num_rx_queues; i++) {
926 rrd_ring[i].dma = ring_header->dma + offset;
927 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
928 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
929 rrd_ring[i].count;
930 offset += roundup(rrd_ring[i].size, 8);
931 }
932
933 adapter->smb.dma = ring_header->dma + offset;
934 adapter->smb.smb = (u8 *)ring_header->desc + offset;
935 return 0;
936
937 err_nomem:
938 kfree(tpd_ring->buffer_info);
939 return -ENOMEM;
940 }
941
942 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
943 {
944 struct atl1c_hw *hw = &adapter->hw;
945 struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
946 adapter->rfd_ring;
947 struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
948 adapter->rrd_ring;
949 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
950 adapter->tpd_ring;
951 struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
952 struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
953 int i;
954
955 /* TPD */
956 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
957 (u32)((tpd_ring[atl1c_trans_normal].dma &
958 AT_DMA_HI_ADDR_MASK) >> 32));
959 /* just enable normal priority TX queue */
960 AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
961 (u32)(tpd_ring[atl1c_trans_normal].dma &
962 AT_DMA_LO_ADDR_MASK));
963 AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
964 (u32)(tpd_ring[atl1c_trans_high].dma &
965 AT_DMA_LO_ADDR_MASK));
966 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
967 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
968
969
970 /* RFD */
971 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
972 (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
973 for (i = 0; i < adapter->num_rx_queues; i++)
974 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
975 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
976
977 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
978 rfd_ring[0].count & RFD_RING_SIZE_MASK);
979 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
980 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
981
982 /* RRD */
983 for (i = 0; i < adapter->num_rx_queues; i++)
984 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
985 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
986 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
987 (rrd_ring[0].count & RRD_RING_SIZE_MASK));
988
989 /* CMB */
990 AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
991
992 /* SMB */
993 AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
994 (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
995 AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
996 (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
997 /* Load all of base address above */
998 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
999 }
1000
1001 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1002 {
1003 struct atl1c_hw *hw = &adapter->hw;
1004 u32 dev_ctrl_data;
1005 u32 max_pay_load;
1006 u16 tx_offload_thresh;
1007 u32 txq_ctrl_data;
1008 u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */
1009
1010 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1011 tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1012 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1013 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1014 AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1015 max_pay_load = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1016 DEVICE_CTRL_MAX_PAYLOAD_MASK;
1017 hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1018 max_pay_load = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1019 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1020 hw->dmar_block = min(max_pay_load, hw->dmar_block);
1021
1022 txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1023 TXQ_NUM_TPD_BURST_SHIFT;
1024 if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1025 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1026 txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1027 TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1028
1029 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1030 }
1031
1032 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1033 {
1034 struct atl1c_hw *hw = &adapter->hw;
1035 u32 rxq_ctrl_data;
1036
1037 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1038 RXQ_RFD_BURST_NUM_SHIFT;
1039
1040 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1041 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1042 if (hw->rss_type == atl1c_rss_ipv4)
1043 rxq_ctrl_data |= RSS_HASH_IPV4;
1044 if (hw->rss_type == atl1c_rss_ipv4_tcp)
1045 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1046 if (hw->rss_type == atl1c_rss_ipv6)
1047 rxq_ctrl_data |= RSS_HASH_IPV6;
1048 if (hw->rss_type == atl1c_rss_ipv6_tcp)
1049 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1050 if (hw->rss_type != atl1c_rss_disable)
1051 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1052
1053 rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1054 RSS_MODE_SHIFT;
1055 rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1056 RSS_HASH_BITS_SHIFT;
1057 if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1058 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1059 ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1060
1061 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1062 }
1063
1064 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1065 {
1066 struct atl1c_hw *hw = &adapter->hw;
1067
1068 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1069 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1070 }
1071
1072 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1073 {
1074 struct atl1c_hw *hw = &adapter->hw;
1075 u32 dma_ctrl_data;
1076
1077 dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1078 if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1079 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1080 if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1081 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1082 else
1083 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1084
1085 switch (hw->dma_order) {
1086 case atl1c_dma_ord_in:
1087 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1088 break;
1089 case atl1c_dma_ord_enh:
1090 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1091 break;
1092 case atl1c_dma_ord_out:
1093 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1094 break;
1095 default:
1096 break;
1097 }
1098
1099 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1100 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1101 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1102 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1103 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1104 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1105 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1106 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1107
1108 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1109 }
1110
1111 /*
1112 * Stop the mac, transmit and receive units
1113 * hw - Struct containing variables accessed by shared code
1114 * return : 0 or idle status (if error)
1115 */
1116 static int atl1c_stop_mac(struct atl1c_hw *hw)
1117 {
1118 u32 data;
1119
1120 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1121 data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1122 RXQ3_CTRL_EN | RXQ_CTRL_EN);
1123 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1124
1125 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1126 data &= ~TXQ_CTRL_EN;
1127 AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1128
1129 atl1c_wait_until_idle(hw);
1130
1131 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1132 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1133 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1134
1135 return (int)atl1c_wait_until_idle(hw);
1136 }
1137
1138 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1139 {
1140 u32 data;
1141
1142 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1143 switch (hw->adapter->num_rx_queues) {
1144 case 4:
1145 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1146 break;
1147 case 3:
1148 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1149 break;
1150 case 2:
1151 data |= RXQ1_CTRL_EN;
1152 break;
1153 default:
1154 break;
1155 }
1156 data |= RXQ_CTRL_EN;
1157 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1158 }
1159
1160 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1161 {
1162 u32 data;
1163
1164 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1165 data |= TXQ_CTRL_EN;
1166 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1167 }
1168
1169 /*
1170 * Reset the transmit and receive units; mask and clear all interrupts.
1171 * hw - Struct containing variables accessed by shared code
1172 * return : 0 or idle status (if error)
1173 */
1174 static int atl1c_reset_mac(struct atl1c_hw *hw)
1175 {
1176 struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1177 struct pci_dev *pdev = adapter->pdev;
1178 int ret;
1179
1180 AT_WRITE_REG(hw, REG_IMR, 0);
1181 AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1182
1183 ret = atl1c_stop_mac(hw);
1184 if (ret)
1185 return ret;
1186 /*
1187 * Issue Soft Reset to the MAC. This will reset the chip's
1188 * transmit, receive, DMA. It will not effect
1189 * the current PCI configuration. The global reset bit is self-
1190 * clearing, and should clear within a microsecond.
1191 */
1192 AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1193 AT_WRITE_FLUSH(hw);
1194 msleep(10);
1195 /* Wait at least 10ms for All module to be Idle */
1196
1197 if (atl1c_wait_until_idle(hw)) {
1198 dev_err(&pdev->dev,
1199 "MAC state machine can't be idle since"
1200 " disabled for 10ms second\n");
1201 return -1;
1202 }
1203 return 0;
1204 }
1205
1206 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1207 {
1208 u32 pm_ctrl_data;
1209
1210 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1211 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1212 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1213 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1214 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1215 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1216 pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1217 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1218
1219 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1220 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1221 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1222 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1223 }
1224
1225 /*
1226 * Set ASPM state.
1227 * Enable/disable L0s/L1 depend on link state.
1228 */
1229 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1230 {
1231 u32 pm_ctrl_data;
1232
1233 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1234
1235 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1236 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1237 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1238
1239 pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1240
1241 if (linkup) {
1242 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1243 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1244
1245 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1246 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1247 } else {
1248 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1249 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1250 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1251 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1252
1253 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1254
1255 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1256 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1257 else
1258 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1259 }
1260
1261 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1262 }
1263
1264 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1265 {
1266 struct atl1c_hw *hw = &adapter->hw;
1267 struct net_device *netdev = adapter->netdev;
1268 u32 mac_ctrl_data;
1269
1270 mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1271 mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1272
1273 if (adapter->link_duplex == FULL_DUPLEX) {
1274 hw->mac_duplex = true;
1275 mac_ctrl_data |= MAC_CTRL_DUPLX;
1276 }
1277
1278 if (adapter->link_speed == SPEED_1000)
1279 hw->mac_speed = atl1c_mac_speed_1000;
1280 else
1281 hw->mac_speed = atl1c_mac_speed_10_100;
1282
1283 mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1284 MAC_CTRL_SPEED_SHIFT;
1285
1286 mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1287 mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1288 MAC_CTRL_PRMLEN_SHIFT);
1289
1290 if (adapter->vlgrp)
1291 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1292
1293 mac_ctrl_data |= MAC_CTRL_BC_EN;
1294 if (netdev->flags & IFF_PROMISC)
1295 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1296 if (netdev->flags & IFF_ALLMULTI)
1297 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1298
1299 mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1300 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1301 }
1302
1303 /*
1304 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1305 * @adapter: board private structure
1306 *
1307 * Configure the Tx /Rx unit of the MAC after a reset.
1308 */
1309 static int atl1c_configure(struct atl1c_adapter *adapter)
1310 {
1311 struct atl1c_hw *hw = &adapter->hw;
1312 u32 master_ctrl_data = 0;
1313 u32 intr_modrt_data;
1314
1315 /* clear interrupt status */
1316 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1317 /* Clear any WOL status */
1318 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1319 /* set Interrupt Clear Timer
1320 * HW will enable self to assert interrupt event to system after
1321 * waiting x-time for software to notify it accept interrupt.
1322 */
1323 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1324 hw->ict & INT_RETRIG_TIMER_MASK);
1325
1326 atl1c_configure_des_ring(adapter);
1327
1328 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1329 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1330 IRQ_MODRT_TX_TIMER_SHIFT;
1331 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1332 IRQ_MODRT_RX_TIMER_SHIFT;
1333 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1334 master_ctrl_data |=
1335 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1336 }
1337
1338 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1339 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1340
1341 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1342
1343 if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1344 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1345 hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1346 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1347 hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1348 }
1349
1350 if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1351 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1352 hw->smb_timer & SMB_STAT_TIMER_MASK);
1353 /* set MTU */
1354 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1355 VLAN_HLEN + ETH_FCS_LEN);
1356 /* HDS, disable */
1357 AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1358
1359 atl1c_configure_tx(adapter);
1360 atl1c_configure_rx(adapter);
1361 atl1c_configure_rss(adapter);
1362 atl1c_configure_dma(adapter);
1363
1364 return 0;
1365 }
1366
1367 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1368 {
1369 u16 hw_reg_addr = 0;
1370 unsigned long *stats_item = NULL;
1371 u32 data;
1372
1373 /* update rx status */
1374 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1375 stats_item = &adapter->hw_stats.rx_ok;
1376 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1377 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1378 *stats_item += data;
1379 stats_item++;
1380 hw_reg_addr += 4;
1381 }
1382 /* update tx status */
1383 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1384 stats_item = &adapter->hw_stats.tx_ok;
1385 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1386 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1387 *stats_item += data;
1388 stats_item++;
1389 hw_reg_addr += 4;
1390 }
1391 }
1392
1393 /*
1394 * atl1c_get_stats - Get System Network Statistics
1395 * @netdev: network interface device structure
1396 *
1397 * Returns the address of the device statistics structure.
1398 * The statistics are actually updated from the timer callback.
1399 */
1400 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1401 {
1402 struct atl1c_adapter *adapter = netdev_priv(netdev);
1403 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1404 struct net_device_stats *net_stats = &adapter->net_stats;
1405
1406 atl1c_update_hw_stats(adapter);
1407 net_stats->rx_packets = hw_stats->rx_ok;
1408 net_stats->tx_packets = hw_stats->tx_ok;
1409 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1410 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1411 net_stats->multicast = hw_stats->rx_mcast;
1412 net_stats->collisions = hw_stats->tx_1_col +
1413 hw_stats->tx_2_col * 2 +
1414 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1415 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1416 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1417 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1418 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1419 net_stats->rx_length_errors = hw_stats->rx_len_err;
1420 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1421 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1422 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1423
1424 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1425
1426 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1427 hw_stats->tx_underrun + hw_stats->tx_trunc;
1428 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1429 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1430 net_stats->tx_window_errors = hw_stats->tx_late_col;
1431
1432 return &adapter->net_stats;
1433 }
1434
1435 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1436 {
1437 u16 phy_data;
1438
1439 spin_lock(&adapter->mdio_lock);
1440 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1441 spin_unlock(&adapter->mdio_lock);
1442 }
1443
1444 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1445 enum atl1c_trans_queue type)
1446 {
1447 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1448 &adapter->tpd_ring[type];
1449 struct atl1c_buffer *buffer_info;
1450 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1451 u16 hw_next_to_clean;
1452 u16 shift;
1453 u32 data;
1454
1455 if (type == atl1c_trans_high)
1456 shift = MB_HTPD_CONS_IDX_SHIFT;
1457 else
1458 shift = MB_NTPD_CONS_IDX_SHIFT;
1459
1460 AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1461 hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1462
1463 while (next_to_clean != hw_next_to_clean) {
1464 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1465 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1466 pci_unmap_page(adapter->pdev, buffer_info->dma,
1467 buffer_info->length, PCI_DMA_TODEVICE);
1468 buffer_info->dma = 0;
1469 if (buffer_info->skb) {
1470 dev_kfree_skb_irq(buffer_info->skb);
1471 buffer_info->skb = NULL;
1472 }
1473 buffer_info->state = ATL1_BUFFER_FREE;
1474 }
1475 if (++next_to_clean == tpd_ring->count)
1476 next_to_clean = 0;
1477 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1478 }
1479
1480 if (netif_queue_stopped(adapter->netdev) &&
1481 netif_carrier_ok(adapter->netdev)) {
1482 netif_wake_queue(adapter->netdev);
1483 }
1484
1485 return true;
1486 }
1487
1488 /*
1489 * atl1c_intr - Interrupt Handler
1490 * @irq: interrupt number
1491 * @data: pointer to a network interface device structure
1492 * @pt_regs: CPU registers structure
1493 */
1494 static irqreturn_t atl1c_intr(int irq, void *data)
1495 {
1496 struct net_device *netdev = data;
1497 struct atl1c_adapter *adapter = netdev_priv(netdev);
1498 struct pci_dev *pdev = adapter->pdev;
1499 struct atl1c_hw *hw = &adapter->hw;
1500 int max_ints = AT_MAX_INT_WORK;
1501 int handled = IRQ_NONE;
1502 u32 status;
1503 u32 reg_data;
1504
1505 do {
1506 AT_READ_REG(hw, REG_ISR, &reg_data);
1507 status = reg_data & hw->intr_mask;
1508
1509 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1510 if (max_ints != AT_MAX_INT_WORK)
1511 handled = IRQ_HANDLED;
1512 break;
1513 }
1514 /* link event */
1515 if (status & ISR_GPHY)
1516 atl1c_clear_phy_int(adapter);
1517 /* Ack ISR */
1518 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1519 if (status & ISR_RX_PKT) {
1520 if (likely(napi_schedule_prep(&adapter->napi))) {
1521 hw->intr_mask &= ~ISR_RX_PKT;
1522 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1523 __napi_schedule(&adapter->napi);
1524 }
1525 }
1526 if (status & ISR_TX_PKT)
1527 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1528
1529 handled = IRQ_HANDLED;
1530 /* check if PCIE PHY Link down */
1531 if (status & ISR_ERROR) {
1532 if (netif_msg_hw(adapter))
1533 dev_err(&pdev->dev,
1534 "atl1c hardware error (status = 0x%x)\n",
1535 status & ISR_ERROR);
1536 /* reset MAC */
1537 hw->intr_mask &= ~ISR_ERROR;
1538 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1539 schedule_work(&adapter->reset_task);
1540 break;
1541 }
1542
1543 if (status & ISR_OVER)
1544 if (netif_msg_intr(adapter))
1545 dev_warn(&pdev->dev,
1546 "TX/RX over flow (status = 0x%x)\n",
1547 status & ISR_OVER);
1548
1549 /* link event */
1550 if (status & (ISR_GPHY | ISR_MANUAL)) {
1551 adapter->net_stats.tx_carrier_errors++;
1552 atl1c_link_chg_event(adapter);
1553 break;
1554 }
1555
1556 } while (--max_ints > 0);
1557 /* re-enable Interrupt*/
1558 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1559 return handled;
1560 }
1561
1562 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1563 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1564 {
1565 /*
1566 * The pid field in RRS in not correct sometimes, so we
1567 * cannot figure out if the packet is fragmented or not,
1568 * so we tell the KERNEL CHECKSUM_NONE
1569 */
1570 skb->ip_summed = CHECKSUM_NONE;
1571 }
1572
1573 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1574 {
1575 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1576 struct pci_dev *pdev = adapter->pdev;
1577 struct atl1c_buffer *buffer_info, *next_info;
1578 struct sk_buff *skb;
1579 void *vir_addr = NULL;
1580 u16 num_alloc = 0;
1581 u16 rfd_next_to_use, next_next;
1582 struct atl1c_rx_free_desc *rfd_desc;
1583
1584 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1585 if (++next_next == rfd_ring->count)
1586 next_next = 0;
1587 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1588 next_info = &rfd_ring->buffer_info[next_next];
1589
1590 while (next_info->state == ATL1_BUFFER_FREE) {
1591 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1592
1593 skb = dev_alloc_skb(adapter->rx_buffer_len);
1594 if (unlikely(!skb)) {
1595 if (netif_msg_rx_err(adapter))
1596 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1597 break;
1598 }
1599
1600 /*
1601 * Make buffer alignment 2 beyond a 16 byte boundary
1602 * this will result in a 16 byte aligned IP header after
1603 * the 14 byte MAC header is removed
1604 */
1605 vir_addr = skb->data;
1606 buffer_info->state = ATL1_BUFFER_BUSY;
1607 buffer_info->skb = skb;
1608 buffer_info->length = adapter->rx_buffer_len;
1609 buffer_info->dma = pci_map_single(pdev, vir_addr,
1610 buffer_info->length,
1611 PCI_DMA_FROMDEVICE);
1612 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1613 rfd_next_to_use = next_next;
1614 if (++next_next == rfd_ring->count)
1615 next_next = 0;
1616 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1617 next_info = &rfd_ring->buffer_info[next_next];
1618 num_alloc++;
1619 }
1620
1621 if (num_alloc) {
1622 /* TODO: update mailbox here */
1623 wmb();
1624 rfd_ring->next_to_use = rfd_next_to_use;
1625 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1626 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1627 }
1628
1629 return num_alloc;
1630 }
1631
1632 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1633 struct atl1c_recv_ret_status *rrs, u16 num)
1634 {
1635 u16 i;
1636 /* the relationship between rrd and rfd is one map one */
1637 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1638 rrd_ring->next_to_clean)) {
1639 rrs->word3 &= ~RRS_RXD_UPDATED;
1640 if (++rrd_ring->next_to_clean == rrd_ring->count)
1641 rrd_ring->next_to_clean = 0;
1642 }
1643 }
1644
1645 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1646 struct atl1c_recv_ret_status *rrs, u16 num)
1647 {
1648 u16 i;
1649 u16 rfd_index;
1650 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1651
1652 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1653 RRS_RX_RFD_INDEX_MASK;
1654 for (i = 0; i < num; i++) {
1655 buffer_info[rfd_index].skb = NULL;
1656 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1657 if (++rfd_index == rfd_ring->count)
1658 rfd_index = 0;
1659 }
1660 rfd_ring->next_to_clean = rfd_index;
1661 }
1662
1663 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1664 int *work_done, int work_to_do)
1665 {
1666 u16 rfd_num, rfd_index;
1667 u16 count = 0;
1668 u16 length;
1669 struct pci_dev *pdev = adapter->pdev;
1670 struct net_device *netdev = adapter->netdev;
1671 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1672 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1673 struct sk_buff *skb;
1674 struct atl1c_recv_ret_status *rrs;
1675 struct atl1c_buffer *buffer_info;
1676
1677 while (1) {
1678 if (*work_done >= work_to_do)
1679 break;
1680 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1681 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1682 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1683 RRS_RX_RFD_CNT_MASK;
1684 if (unlikely(rfd_num != 1))
1685 /* TODO support mul rfd*/
1686 if (netif_msg_rx_err(adapter))
1687 dev_warn(&pdev->dev,
1688 "Multi rfd not support yet!\n");
1689 goto rrs_checked;
1690 } else {
1691 break;
1692 }
1693 rrs_checked:
1694 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1695 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1696 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1697 if (netif_msg_rx_err(adapter))
1698 dev_warn(&pdev->dev,
1699 "wrong packet! rrs word3 is %x\n",
1700 rrs->word3);
1701 continue;
1702 }
1703
1704 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1705 RRS_PKT_SIZE_MASK);
1706 /* Good Receive */
1707 if (likely(rfd_num == 1)) {
1708 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1709 RRS_RX_RFD_INDEX_MASK;
1710 buffer_info = &rfd_ring->buffer_info[rfd_index];
1711 pci_unmap_single(pdev, buffer_info->dma,
1712 buffer_info->length, PCI_DMA_FROMDEVICE);
1713 skb = buffer_info->skb;
1714 } else {
1715 /* TODO */
1716 if (netif_msg_rx_err(adapter))
1717 dev_warn(&pdev->dev,
1718 "Multi rfd not support yet!\n");
1719 break;
1720 }
1721 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1722 skb_put(skb, length - ETH_FCS_LEN);
1723 skb->protocol = eth_type_trans(skb, netdev);
1724 skb->dev = netdev;
1725 atl1c_rx_checksum(adapter, skb, rrs);
1726 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1727 u16 vlan;
1728
1729 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1730 vlan = le16_to_cpu(vlan);
1731 vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1732 } else
1733 netif_receive_skb(skb);
1734
1735 (*work_done)++;
1736 count++;
1737 }
1738 if (count)
1739 atl1c_alloc_rx_buffer(adapter, que);
1740 }
1741
1742 /*
1743 * atl1c_clean - NAPI Rx polling callback
1744 * @adapter: board private structure
1745 */
1746 static int atl1c_clean(struct napi_struct *napi, int budget)
1747 {
1748 struct atl1c_adapter *adapter =
1749 container_of(napi, struct atl1c_adapter, napi);
1750 int work_done = 0;
1751
1752 /* Keep link state information with original netdev */
1753 if (!netif_carrier_ok(adapter->netdev))
1754 goto quit_polling;
1755 /* just enable one RXQ */
1756 atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1757
1758 if (work_done < budget) {
1759 quit_polling:
1760 napi_complete(napi);
1761 adapter->hw.intr_mask |= ISR_RX_PKT;
1762 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1763 }
1764 return work_done;
1765 }
1766
1767 #ifdef CONFIG_NET_POLL_CONTROLLER
1768
1769 /*
1770 * Polling 'interrupt' - used by things like netconsole to send skbs
1771 * without having to re-enable interrupts. It's not called while
1772 * the interrupt routine is executing.
1773 */
1774 static void atl1c_netpoll(struct net_device *netdev)
1775 {
1776 struct atl1c_adapter *adapter = netdev_priv(netdev);
1777
1778 disable_irq(adapter->pdev->irq);
1779 atl1c_intr(adapter->pdev->irq, netdev);
1780 enable_irq(adapter->pdev->irq);
1781 }
1782 #endif
1783
1784 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1785 {
1786 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1787 u16 next_to_use = 0;
1788 u16 next_to_clean = 0;
1789
1790 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1791 next_to_use = tpd_ring->next_to_use;
1792
1793 return (u16)(next_to_clean > next_to_use) ?
1794 (next_to_clean - next_to_use - 1) :
1795 (tpd_ring->count + next_to_clean - next_to_use - 1);
1796 }
1797
1798 /*
1799 * get next usable tpd
1800 * Note: should call atl1c_tdp_avail to make sure
1801 * there is enough tpd to use
1802 */
1803 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1804 enum atl1c_trans_queue type)
1805 {
1806 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1807 struct atl1c_tpd_desc *tpd_desc;
1808 u16 next_to_use = 0;
1809
1810 next_to_use = tpd_ring->next_to_use;
1811 if (++tpd_ring->next_to_use == tpd_ring->count)
1812 tpd_ring->next_to_use = 0;
1813 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1814 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1815 return tpd_desc;
1816 }
1817
1818 static struct atl1c_buffer *
1819 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1820 {
1821 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1822
1823 return &tpd_ring->buffer_info[tpd -
1824 (struct atl1c_tpd_desc *)tpd_ring->desc];
1825 }
1826
1827 /* Calculate the transmit packet descript needed*/
1828 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1829 {
1830 u16 tpd_req;
1831 u16 proto_hdr_len = 0;
1832
1833 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1834
1835 if (skb_is_gso(skb)) {
1836 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1837 if (proto_hdr_len < skb_headlen(skb))
1838 tpd_req++;
1839 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1840 tpd_req++;
1841 }
1842 return tpd_req;
1843 }
1844
1845 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1846 struct sk_buff *skb,
1847 struct atl1c_tpd_desc **tpd,
1848 enum atl1c_trans_queue type)
1849 {
1850 struct pci_dev *pdev = adapter->pdev;
1851 u8 hdr_len;
1852 u32 real_len;
1853 unsigned short offload_type;
1854 int err;
1855
1856 if (skb_is_gso(skb)) {
1857 if (skb_header_cloned(skb)) {
1858 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1859 if (unlikely(err))
1860 return -1;
1861 }
1862 offload_type = skb_shinfo(skb)->gso_type;
1863
1864 if (offload_type & SKB_GSO_TCPV4) {
1865 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1866 + ntohs(ip_hdr(skb)->tot_len));
1867
1868 if (real_len < skb->len)
1869 pskb_trim(skb, real_len);
1870
1871 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1872 if (unlikely(skb->len == hdr_len)) {
1873 /* only xsum need */
1874 if (netif_msg_tx_queued(adapter))
1875 dev_warn(&pdev->dev,
1876 "IPV4 tso with zero data??\n");
1877 goto check_sum;
1878 } else {
1879 ip_hdr(skb)->check = 0;
1880 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1881 ip_hdr(skb)->saddr,
1882 ip_hdr(skb)->daddr,
1883 0, IPPROTO_TCP, 0);
1884 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1885 }
1886 }
1887
1888 if (offload_type & SKB_GSO_TCPV6) {
1889 struct atl1c_tpd_ext_desc *etpd =
1890 *(struct atl1c_tpd_ext_desc **)(tpd);
1891
1892 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1893 *tpd = atl1c_get_tpd(adapter, type);
1894 ipv6_hdr(skb)->payload_len = 0;
1895 /* check payload == 0 byte ? */
1896 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1897 if (unlikely(skb->len == hdr_len)) {
1898 /* only xsum need */
1899 if (netif_msg_tx_queued(adapter))
1900 dev_warn(&pdev->dev,
1901 "IPV6 tso with zero data??\n");
1902 goto check_sum;
1903 } else
1904 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1905 &ipv6_hdr(skb)->saddr,
1906 &ipv6_hdr(skb)->daddr,
1907 0, IPPROTO_TCP, 0);
1908 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1909 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1910 etpd->pkt_len = cpu_to_le32(skb->len);
1911 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1912 }
1913
1914 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1915 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1916 TPD_TCPHDR_OFFSET_SHIFT;
1917 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1918 TPD_MSS_SHIFT;
1919 return 0;
1920 }
1921
1922 check_sum:
1923 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1924 u8 css, cso;
1925 cso = skb_transport_offset(skb);
1926
1927 if (unlikely(cso & 0x1)) {
1928 if (netif_msg_tx_err(adapter))
1929 dev_err(&adapter->pdev->dev,
1930 "payload offset should not an event number\n");
1931 return -1;
1932 } else {
1933 css = cso + skb->csum_offset;
1934
1935 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1936 TPD_PLOADOFFSET_SHIFT;
1937 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1938 TPD_CCSUM_OFFSET_SHIFT;
1939 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1940 }
1941 }
1942 return 0;
1943 }
1944
1945 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1946 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1947 enum atl1c_trans_queue type)
1948 {
1949 struct atl1c_tpd_desc *use_tpd = NULL;
1950 struct atl1c_buffer *buffer_info = NULL;
1951 u16 buf_len = skb_headlen(skb);
1952 u16 map_len = 0;
1953 u16 mapped_len = 0;
1954 u16 hdr_len = 0;
1955 u16 nr_frags;
1956 u16 f;
1957 int tso;
1958
1959 nr_frags = skb_shinfo(skb)->nr_frags;
1960 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1961 if (tso) {
1962 /* TSO */
1963 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1964 use_tpd = tpd;
1965
1966 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1967 buffer_info->length = map_len;
1968 buffer_info->dma = pci_map_single(adapter->pdev,
1969 skb->data, hdr_len, PCI_DMA_TODEVICE);
1970 buffer_info->state = ATL1_BUFFER_BUSY;
1971 mapped_len += map_len;
1972 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1973 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1974 }
1975
1976 if (mapped_len < buf_len) {
1977 /* mapped_len == 0, means we should use the first tpd,
1978 which is given by caller */
1979 if (mapped_len == 0)
1980 use_tpd = tpd;
1981 else {
1982 use_tpd = atl1c_get_tpd(adapter, type);
1983 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1984 use_tpd = atl1c_get_tpd(adapter, type);
1985 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1986 }
1987 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1988 buffer_info->length = buf_len - mapped_len;
1989 buffer_info->dma =
1990 pci_map_single(adapter->pdev, skb->data + mapped_len,
1991 buffer_info->length, PCI_DMA_TODEVICE);
1992 buffer_info->state = ATL1_BUFFER_BUSY;
1993
1994 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1995 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1996 }
1997
1998 for (f = 0; f < nr_frags; f++) {
1999 struct skb_frag_struct *frag;
2000
2001 frag = &skb_shinfo(skb)->frags[f];
2002
2003 use_tpd = atl1c_get_tpd(adapter, type);
2004 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2005
2006 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2007 buffer_info->length = frag->size;
2008 buffer_info->dma =
2009 pci_map_page(adapter->pdev, frag->page,
2010 frag->page_offset,
2011 buffer_info->length,
2012 PCI_DMA_TODEVICE);
2013 buffer_info->state = ATL1_BUFFER_BUSY;
2014
2015 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2016 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2017 }
2018
2019 /* The last tpd */
2020 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2021 /* The last buffer info contain the skb address,
2022 so it will be free after unmap */
2023 buffer_info->skb = skb;
2024 }
2025
2026 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2027 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2028 {
2029 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2030 u32 prod_data;
2031
2032 AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2033 switch (type) {
2034 case atl1c_trans_high:
2035 prod_data &= 0xFFFF0000;
2036 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2037 break;
2038 case atl1c_trans_normal:
2039 prod_data &= 0x0000FFFF;
2040 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2041 break;
2042 default:
2043 break;
2044 }
2045 wmb();
2046 AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2047 }
2048
2049 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2050 struct net_device *netdev)
2051 {
2052 struct atl1c_adapter *adapter = netdev_priv(netdev);
2053 unsigned long flags;
2054 u16 tpd_req = 1;
2055 struct atl1c_tpd_desc *tpd;
2056 enum atl1c_trans_queue type = atl1c_trans_normal;
2057
2058 if (test_bit(__AT_DOWN, &adapter->flags)) {
2059 dev_kfree_skb_any(skb);
2060 return NETDEV_TX_OK;
2061 }
2062
2063 tpd_req = atl1c_cal_tpd_req(skb);
2064 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2065 if (netif_msg_pktdata(adapter))
2066 dev_info(&adapter->pdev->dev, "tx locked\n");
2067 return NETDEV_TX_LOCKED;
2068 }
2069 if (skb->mark == 0x01)
2070 type = atl1c_trans_high;
2071 else
2072 type = atl1c_trans_normal;
2073
2074 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2075 /* no enough descriptor, just stop queue */
2076 netif_stop_queue(netdev);
2077 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2078 return NETDEV_TX_BUSY;
2079 }
2080
2081 tpd = atl1c_get_tpd(adapter, type);
2082
2083 /* do TSO and check sum */
2084 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2085 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2086 dev_kfree_skb_any(skb);
2087 return NETDEV_TX_OK;
2088 }
2089
2090 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2091 u16 vlan = vlan_tx_tag_get(skb);
2092 __le16 tag;
2093
2094 vlan = cpu_to_le16(vlan);
2095 AT_VLAN_TO_TAG(vlan, tag);
2096 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2097 tpd->vlan_tag = tag;
2098 }
2099
2100 if (skb_network_offset(skb) != ETH_HLEN)
2101 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2102
2103 atl1c_tx_map(adapter, skb, tpd, type);
2104 atl1c_tx_queue(adapter, skb, tpd, type);
2105
2106 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2107 return NETDEV_TX_OK;
2108 }
2109
2110 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2111 {
2112 struct net_device *netdev = adapter->netdev;
2113
2114 free_irq(adapter->pdev->irq, netdev);
2115
2116 if (adapter->have_msi)
2117 pci_disable_msi(adapter->pdev);
2118 }
2119
2120 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2121 {
2122 struct pci_dev *pdev = adapter->pdev;
2123 struct net_device *netdev = adapter->netdev;
2124 int flags = 0;
2125 int err = 0;
2126
2127 adapter->have_msi = true;
2128 err = pci_enable_msi(adapter->pdev);
2129 if (err) {
2130 if (netif_msg_ifup(adapter))
2131 dev_err(&pdev->dev,
2132 "Unable to allocate MSI interrupt Error: %d\n",
2133 err);
2134 adapter->have_msi = false;
2135 } else
2136 netdev->irq = pdev->irq;
2137
2138 if (!adapter->have_msi)
2139 flags |= IRQF_SHARED;
2140 err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2141 netdev->name, netdev);
2142 if (err) {
2143 if (netif_msg_ifup(adapter))
2144 dev_err(&pdev->dev,
2145 "Unable to allocate interrupt Error: %d\n",
2146 err);
2147 if (adapter->have_msi)
2148 pci_disable_msi(adapter->pdev);
2149 return err;
2150 }
2151 if (netif_msg_ifup(adapter))
2152 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2153 return err;
2154 }
2155
2156 int atl1c_up(struct atl1c_adapter *adapter)
2157 {
2158 struct net_device *netdev = adapter->netdev;
2159 int num;
2160 int err;
2161 int i;
2162
2163 netif_carrier_off(netdev);
2164 atl1c_init_ring_ptrs(adapter);
2165 atl1c_set_multi(netdev);
2166 atl1c_restore_vlan(adapter);
2167
2168 for (i = 0; i < adapter->num_rx_queues; i++) {
2169 num = atl1c_alloc_rx_buffer(adapter, i);
2170 if (unlikely(num == 0)) {
2171 err = -ENOMEM;
2172 goto err_alloc_rx;
2173 }
2174 }
2175
2176 if (atl1c_configure(adapter)) {
2177 err = -EIO;
2178 goto err_up;
2179 }
2180
2181 err = atl1c_request_irq(adapter);
2182 if (unlikely(err))
2183 goto err_up;
2184
2185 clear_bit(__AT_DOWN, &adapter->flags);
2186 napi_enable(&adapter->napi);
2187 atl1c_irq_enable(adapter);
2188 atl1c_check_link_status(adapter);
2189 netif_start_queue(netdev);
2190 return err;
2191
2192 err_up:
2193 err_alloc_rx:
2194 atl1c_clean_rx_ring(adapter);
2195 return err;
2196 }
2197
2198 void atl1c_down(struct atl1c_adapter *adapter)
2199 {
2200 struct net_device *netdev = adapter->netdev;
2201
2202 atl1c_del_timer(adapter);
2203 atl1c_cancel_work(adapter);
2204
2205 /* signal that we're down so the interrupt handler does not
2206 * reschedule our watchdog timer */
2207 set_bit(__AT_DOWN, &adapter->flags);
2208 netif_carrier_off(netdev);
2209 napi_disable(&adapter->napi);
2210 atl1c_irq_disable(adapter);
2211 atl1c_free_irq(adapter);
2212 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2213 /* reset MAC to disable all RX/TX */
2214 atl1c_reset_mac(&adapter->hw);
2215 msleep(1);
2216
2217 adapter->link_speed = SPEED_0;
2218 adapter->link_duplex = -1;
2219 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2220 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2221 atl1c_clean_rx_ring(adapter);
2222 }
2223
2224 /*
2225 * atl1c_open - Called when a network interface is made active
2226 * @netdev: network interface device structure
2227 *
2228 * Returns 0 on success, negative value on failure
2229 *
2230 * The open entry point is called when a network interface is made
2231 * active by the system (IFF_UP). At this point all resources needed
2232 * for transmit and receive operations are allocated, the interrupt
2233 * handler is registered with the OS, the watchdog timer is started,
2234 * and the stack is notified that the interface is ready.
2235 */
2236 static int atl1c_open(struct net_device *netdev)
2237 {
2238 struct atl1c_adapter *adapter = netdev_priv(netdev);
2239 int err;
2240
2241 /* disallow open during test */
2242 if (test_bit(__AT_TESTING, &adapter->flags))
2243 return -EBUSY;
2244
2245 /* allocate rx/tx dma buffer & descriptors */
2246 err = atl1c_setup_ring_resources(adapter);
2247 if (unlikely(err))
2248 return err;
2249
2250 err = atl1c_up(adapter);
2251 if (unlikely(err))
2252 goto err_up;
2253
2254 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2255 u32 phy_data;
2256
2257 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2258 phy_data |= MDIO_AP_EN;
2259 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2260 }
2261 return 0;
2262
2263 err_up:
2264 atl1c_free_irq(adapter);
2265 atl1c_free_ring_resources(adapter);
2266 atl1c_reset_mac(&adapter->hw);
2267 return err;
2268 }
2269
2270 /*
2271 * atl1c_close - Disables a network interface
2272 * @netdev: network interface device structure
2273 *
2274 * Returns 0, this is not allowed to fail
2275 *
2276 * The close entry point is called when an interface is de-activated
2277 * by the OS. The hardware is still under the drivers control, but
2278 * needs to be disabled. A global MAC reset is issued to stop the
2279 * hardware, and all transmit and receive resources are freed.
2280 */
2281 static int atl1c_close(struct net_device *netdev)
2282 {
2283 struct atl1c_adapter *adapter = netdev_priv(netdev);
2284
2285 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2286 atl1c_down(adapter);
2287 atl1c_free_ring_resources(adapter);
2288 return 0;
2289 }
2290
2291 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2292 {
2293 struct net_device *netdev = pci_get_drvdata(pdev);
2294 struct atl1c_adapter *adapter = netdev_priv(netdev);
2295 struct atl1c_hw *hw = &adapter->hw;
2296 u32 ctrl;
2297 u32 mac_ctrl_data;
2298 u32 master_ctrl_data;
2299 u32 wol_ctrl_data = 0;
2300 u16 mii_bmsr_data;
2301 u16 save_autoneg_advertised;
2302 u16 mii_intr_status_data;
2303 u32 wufc = adapter->wol;
2304 u32 i;
2305 int retval = 0;
2306
2307 if (netif_running(netdev)) {
2308 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2309 atl1c_down(adapter);
2310 }
2311 netif_device_detach(netdev);
2312 atl1c_disable_l0s_l1(hw);
2313 retval = pci_save_state(pdev);
2314 if (retval)
2315 return retval;
2316 if (wufc) {
2317 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2318 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2319
2320 /* get link status */
2321 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2322 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2323 save_autoneg_advertised = hw->autoneg_advertised;
2324 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2325 if (atl1c_restart_autoneg(hw) != 0)
2326 if (netif_msg_link(adapter))
2327 dev_warn(&pdev->dev, "phy autoneg failed\n");
2328 hw->phy_configured = false; /* re-init PHY when resume */
2329 hw->autoneg_advertised = save_autoneg_advertised;
2330 /* turn on magic packet wol */
2331 if (wufc & AT_WUFC_MAG)
2332 wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2333
2334 if (wufc & AT_WUFC_LNKC) {
2335 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2336 msleep(100);
2337 atl1c_read_phy_reg(hw, MII_BMSR,
2338 (u16 *)&mii_bmsr_data);
2339 if (mii_bmsr_data & BMSR_LSTATUS)
2340 break;
2341 }
2342 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2343 if (netif_msg_link(adapter))
2344 dev_warn(&pdev->dev,
2345 "%s: Link may change"
2346 "when suspend\n",
2347 atl1c_driver_name);
2348 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2349 /* only link up can wake up */
2350 if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2351 if (netif_msg_link(adapter))
2352 dev_err(&pdev->dev,
2353 "%s: read write phy "
2354 "register failed.\n",
2355 atl1c_driver_name);
2356 goto wol_dis;
2357 }
2358 }
2359 /* clear phy interrupt */
2360 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2361 /* Config MAC Ctrl register */
2362 mac_ctrl_data = MAC_CTRL_RX_EN;
2363 /* set to 10/100M halt duplex */
2364 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2365 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2366 MAC_CTRL_PRMLEN_MASK) <<
2367 MAC_CTRL_PRMLEN_SHIFT);
2368
2369 if (adapter->vlgrp)
2370 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2371
2372 /* magic packet maybe Broadcast&multicast&Unicast frame */
2373 if (wufc & AT_WUFC_MAG)
2374 mac_ctrl_data |= MAC_CTRL_BC_EN;
2375
2376 if (netif_msg_hw(adapter))
2377 dev_dbg(&pdev->dev,
2378 "%s: suspend MAC=0x%x\n",
2379 atl1c_driver_name, mac_ctrl_data);
2380 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2381 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2382 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2383
2384 /* pcie patch */
2385 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2386 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2387 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2388
2389 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2390 goto suspend_exit;
2391 }
2392 wol_dis:
2393
2394 /* WOL disabled */
2395 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2396
2397 /* pcie patch */
2398 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2399 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2400 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2401
2402 atl1c_phy_disable(hw);
2403 hw->phy_configured = false; /* re-init PHY when resume */
2404
2405 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2406 suspend_exit:
2407
2408 pci_disable_device(pdev);
2409 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2410
2411 return 0;
2412 }
2413
2414 static int atl1c_resume(struct pci_dev *pdev)
2415 {
2416 struct net_device *netdev = pci_get_drvdata(pdev);
2417 struct atl1c_adapter *adapter = netdev_priv(netdev);
2418
2419 pci_set_power_state(pdev, PCI_D0);
2420 pci_restore_state(pdev);
2421 pci_enable_wake(pdev, PCI_D3hot, 0);
2422 pci_enable_wake(pdev, PCI_D3cold, 0);
2423
2424 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2425
2426 atl1c_phy_reset(&adapter->hw);
2427 atl1c_reset_mac(&adapter->hw);
2428 netif_device_attach(netdev);
2429 if (netif_running(netdev))
2430 atl1c_up(adapter);
2431
2432 return 0;
2433 }
2434
2435 static void atl1c_shutdown(struct pci_dev *pdev)
2436 {
2437 atl1c_suspend(pdev, PMSG_SUSPEND);
2438 }
2439
2440 static const struct net_device_ops atl1c_netdev_ops = {
2441 .ndo_open = atl1c_open,
2442 .ndo_stop = atl1c_close,
2443 .ndo_validate_addr = eth_validate_addr,
2444 .ndo_start_xmit = atl1c_xmit_frame,
2445 .ndo_set_mac_address = atl1c_set_mac_addr,
2446 .ndo_set_multicast_list = atl1c_set_multi,
2447 .ndo_change_mtu = atl1c_change_mtu,
2448 .ndo_do_ioctl = atl1c_ioctl,
2449 .ndo_tx_timeout = atl1c_tx_timeout,
2450 .ndo_get_stats = atl1c_get_stats,
2451 .ndo_vlan_rx_register = atl1c_vlan_rx_register,
2452 #ifdef CONFIG_NET_POLL_CONTROLLER
2453 .ndo_poll_controller = atl1c_netpoll,
2454 #endif
2455 };
2456
2457 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2458 {
2459 SET_NETDEV_DEV(netdev, &pdev->dev);
2460 pci_set_drvdata(pdev, netdev);
2461
2462 netdev->irq = pdev->irq;
2463 netdev->netdev_ops = &atl1c_netdev_ops;
2464 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2465 atl1c_set_ethtool_ops(netdev);
2466
2467 /* TODO: add when ready */
2468 netdev->features = NETIF_F_SG |
2469 NETIF_F_HW_CSUM |
2470 NETIF_F_HW_VLAN_TX |
2471 NETIF_F_HW_VLAN_RX |
2472 NETIF_F_TSO |
2473 NETIF_F_TSO6;
2474 return 0;
2475 }
2476
2477 /*
2478 * atl1c_probe - Device Initialization Routine
2479 * @pdev: PCI device information struct
2480 * @ent: entry in atl1c_pci_tbl
2481 *
2482 * Returns 0 on success, negative on failure
2483 *
2484 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2485 * The OS initialization, configuring of the adapter private structure,
2486 * and a hardware reset occur.
2487 */
2488 static int __devinit atl1c_probe(struct pci_dev *pdev,
2489 const struct pci_device_id *ent)
2490 {
2491 struct net_device *netdev;
2492 struct atl1c_adapter *adapter;
2493 static int cards_found;
2494
2495 int err = 0;
2496
2497 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2498 err = pci_enable_device_mem(pdev);
2499 if (err) {
2500 dev_err(&pdev->dev, "cannot enable PCI device\n");
2501 return err;
2502 }
2503
2504 /*
2505 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2506 * shared register for the high 32 bits, so only a single, aligned,
2507 * 4 GB physical address range can be used at a time.
2508 *
2509 * Supporting 64-bit DMA on this hardware is more trouble than it's
2510 * worth. It is far easier to limit to 32-bit DMA than update
2511 * various kernel subsystems to support the mechanics required by a
2512 * fixed-high-32-bit system.
2513 */
2514 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2515 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2516 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2517 goto err_dma;
2518 }
2519
2520 err = pci_request_regions(pdev, atl1c_driver_name);
2521 if (err) {
2522 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2523 goto err_pci_reg;
2524 }
2525
2526 pci_set_master(pdev);
2527
2528 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2529 if (netdev == NULL) {
2530 err = -ENOMEM;
2531 dev_err(&pdev->dev, "etherdev alloc failed\n");
2532 goto err_alloc_etherdev;
2533 }
2534
2535 err = atl1c_init_netdev(netdev, pdev);
2536 if (err) {
2537 dev_err(&pdev->dev, "init netdevice failed\n");
2538 goto err_init_netdev;
2539 }
2540 adapter = netdev_priv(netdev);
2541 adapter->bd_number = cards_found;
2542 adapter->netdev = netdev;
2543 adapter->pdev = pdev;
2544 adapter->hw.adapter = adapter;
2545 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2546 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2547 if (!adapter->hw.hw_addr) {
2548 err = -EIO;
2549 dev_err(&pdev->dev, "cannot map device registers\n");
2550 goto err_ioremap;
2551 }
2552 netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2553
2554 /* init mii data */
2555 adapter->mii.dev = netdev;
2556 adapter->mii.mdio_read = atl1c_mdio_read;
2557 adapter->mii.mdio_write = atl1c_mdio_write;
2558 adapter->mii.phy_id_mask = 0x1f;
2559 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2560 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2561 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2562 (unsigned long)adapter);
2563 /* setup the private structure */
2564 err = atl1c_sw_init(adapter);
2565 if (err) {
2566 dev_err(&pdev->dev, "net device private data init failed\n");
2567 goto err_sw_init;
2568 }
2569 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2570 ATL1C_PCIE_PHY_RESET);
2571
2572 /* Init GPHY as early as possible due to power saving issue */
2573 atl1c_phy_reset(&adapter->hw);
2574
2575 err = atl1c_reset_mac(&adapter->hw);
2576 if (err) {
2577 err = -EIO;
2578 goto err_reset;
2579 }
2580
2581 device_init_wakeup(&pdev->dev, 1);
2582 /* reset the controller to
2583 * put the device in a known good starting state */
2584 err = atl1c_phy_init(&adapter->hw);
2585 if (err) {
2586 err = -EIO;
2587 goto err_reset;
2588 }
2589 if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2590 err = -EIO;
2591 dev_err(&pdev->dev, "get mac address failed\n");
2592 goto err_eeprom;
2593 }
2594 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2595 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2596 if (netif_msg_probe(adapter))
2597 dev_dbg(&pdev->dev,
2598 "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2599 adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2600 adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2601 adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2602
2603 atl1c_hw_set_mac_addr(&adapter->hw);
2604 INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2605 INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2606 err = register_netdev(netdev);
2607 if (err) {
2608 dev_err(&pdev->dev, "register netdevice failed\n");
2609 goto err_register;
2610 }
2611
2612 if (netif_msg_probe(adapter))
2613 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2614 cards_found++;
2615 return 0;
2616
2617 err_reset:
2618 err_register:
2619 err_sw_init:
2620 err_eeprom:
2621 iounmap(adapter->hw.hw_addr);
2622 err_init_netdev:
2623 err_ioremap:
2624 free_netdev(netdev);
2625 err_alloc_etherdev:
2626 pci_release_regions(pdev);
2627 err_pci_reg:
2628 err_dma:
2629 pci_disable_device(pdev);
2630 return err;
2631 }
2632
2633 /*
2634 * atl1c_remove - Device Removal Routine
2635 * @pdev: PCI device information struct
2636 *
2637 * atl1c_remove is called by the PCI subsystem to alert the driver
2638 * that it should release a PCI device. The could be caused by a
2639 * Hot-Plug event, or because the driver is going to be removed from
2640 * memory.
2641 */
2642 static void __devexit atl1c_remove(struct pci_dev *pdev)
2643 {
2644 struct net_device *netdev = pci_get_drvdata(pdev);
2645 struct atl1c_adapter *adapter = netdev_priv(netdev);
2646
2647 unregister_netdev(netdev);
2648 atl1c_phy_disable(&adapter->hw);
2649
2650 iounmap(adapter->hw.hw_addr);
2651
2652 pci_release_regions(pdev);
2653 pci_disable_device(pdev);
2654 free_netdev(netdev);
2655 }
2656
2657 /*
2658 * atl1c_io_error_detected - called when PCI error is detected
2659 * @pdev: Pointer to PCI device
2660 * @state: The current pci connection state
2661 *
2662 * This function is called after a PCI bus error affecting
2663 * this device has been detected.
2664 */
2665 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2666 pci_channel_state_t state)
2667 {
2668 struct net_device *netdev = pci_get_drvdata(pdev);
2669 struct atl1c_adapter *adapter = netdev_priv(netdev);
2670
2671 netif_device_detach(netdev);
2672
2673 if (state == pci_channel_io_perm_failure)
2674 return PCI_ERS_RESULT_DISCONNECT;
2675
2676 if (netif_running(netdev))
2677 atl1c_down(adapter);
2678
2679 pci_disable_device(pdev);
2680
2681 /* Request a slot slot reset. */
2682 return PCI_ERS_RESULT_NEED_RESET;
2683 }
2684
2685 /*
2686 * atl1c_io_slot_reset - called after the pci bus has been reset.
2687 * @pdev: Pointer to PCI device
2688 *
2689 * Restart the card from scratch, as if from a cold-boot. Implementation
2690 * resembles the first-half of the e1000_resume routine.
2691 */
2692 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2693 {
2694 struct net_device *netdev = pci_get_drvdata(pdev);
2695 struct atl1c_adapter *adapter = netdev_priv(netdev);
2696
2697 if (pci_enable_device(pdev)) {
2698 if (netif_msg_hw(adapter))
2699 dev_err(&pdev->dev,
2700 "Cannot re-enable PCI device after reset\n");
2701 return PCI_ERS_RESULT_DISCONNECT;
2702 }
2703 pci_set_master(pdev);
2704
2705 pci_enable_wake(pdev, PCI_D3hot, 0);
2706 pci_enable_wake(pdev, PCI_D3cold, 0);
2707
2708 atl1c_reset_mac(&adapter->hw);
2709
2710 return PCI_ERS_RESULT_RECOVERED;
2711 }
2712
2713 /*
2714 * atl1c_io_resume - called when traffic can start flowing again.
2715 * @pdev: Pointer to PCI device
2716 *
2717 * This callback is called when the error recovery driver tells us that
2718 * its OK to resume normal operation. Implementation resembles the
2719 * second-half of the atl1c_resume routine.
2720 */
2721 static void atl1c_io_resume(struct pci_dev *pdev)
2722 {
2723 struct net_device *netdev = pci_get_drvdata(pdev);
2724 struct atl1c_adapter *adapter = netdev_priv(netdev);
2725
2726 if (netif_running(netdev)) {
2727 if (atl1c_up(adapter)) {
2728 if (netif_msg_hw(adapter))
2729 dev_err(&pdev->dev,
2730 "Cannot bring device back up after reset\n");
2731 return;
2732 }
2733 }
2734
2735 netif_device_attach(netdev);
2736 }
2737
2738 static struct pci_error_handlers atl1c_err_handler = {
2739 .error_detected = atl1c_io_error_detected,
2740 .slot_reset = atl1c_io_slot_reset,
2741 .resume = atl1c_io_resume,
2742 };
2743
2744 static struct pci_driver atl1c_driver = {
2745 .name = atl1c_driver_name,
2746 .id_table = atl1c_pci_tbl,
2747 .probe = atl1c_probe,
2748 .remove = __devexit_p(atl1c_remove),
2749 /* Power Managment Hooks */
2750 .suspend = atl1c_suspend,
2751 .resume = atl1c_resume,
2752 .shutdown = atl1c_shutdown,
2753 .err_handler = &atl1c_err_handler
2754 };
2755
2756 /*
2757 * atl1c_init_module - Driver Registration Routine
2758 *
2759 * atl1c_init_module is the first routine called when the driver is
2760 * loaded. All it does is register with the PCI subsystem.
2761 */
2762 static int __init atl1c_init_module(void)
2763 {
2764 return pci_register_driver(&atl1c_driver);
2765 }
2766
2767 /*
2768 * atl1c_exit_module - Driver Exit Cleanup Routine
2769 *
2770 * atl1c_exit_module is called just before the driver is removed
2771 * from memory.
2772 */
2773 static void __exit atl1c_exit_module(void)
2774 {
2775 pci_unregister_driver(&atl1c_driver);
2776 }
2777
2778 module_init(atl1c_init_module);
2779 module_exit(atl1c_exit_module);
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