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[mirror_ubuntu-hirsute-kernel.git] / drivers / net / atl1c / atl1c_main.c
CommitLineData
43250ddd
JY		 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"
25char atl1c_driver_name[] = "atl1c";
26char 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 */
38static 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};
44MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
45
46MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
47MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
48MODULE_LICENSE("GPL");
49MODULE_VERSION(ATL1C_DRV_VERSION);
50
51static int atl1c_stop_mac(struct atl1c_hw *hw);
52static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
53static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
54static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
55static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
56static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
57static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
58 int *work_done, int work_to_do);
59
60static const u16 atl1c_pay_load_size[] = {
61 128, 256, 512, 1024, 2048, 4096,
62};
63
64static 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
72static 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
80static 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
88static 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 */
94static 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 */
135static 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 */
148static 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 */
160static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
161{
162 atomic_set(&adapter->irq_sem, 1);
163 atl1c_irq_enable(adapter);
164}
165
c930a662
JP		 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 */
170static 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
43250ddd
JY		 184/*
185 * atl1c_phy_config - Timer Call-back
186 * @data: pointer to netdev cast into an unsigned long
187 */
188static 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
199void 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
208static 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
222static 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;
43250ddd
JY		 241 if (atl1c_stop_mac(hw) != 0)
242 if (netif_msg_hw(adapter))
243 dev_warn(&pdev->dev,
244 "stop mac failed\n");
52fbc100 245 atl1c_set_aspm(hw, false);
43250ddd
JY		 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;
52fbc100 261 atl1c_set_aspm(hw, true);
43250ddd
JY		 262 atl1c_enable_tx_ctrl(hw);
263 atl1c_enable_rx_ctrl(hw);
264 atl1c_setup_mac_ctrl(adapter);
43250ddd
JY		 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 */
282static 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
290static 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
317static void atl1c_del_timer(struct atl1c_adapter *adapter)
318{
319 del_timer_sync(&adapter->phy_config_timer);
320}
321
322static 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 */
332static 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 */
349static 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
382static 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
409static 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 */
424static 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
443static 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 */
458static 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 */
495static 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
504static 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 */
518static 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:
43250ddd
JY		 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:
43250ddd
JY		 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 }
563out:
564 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
565 return retval;
566}
567
568/*
569 * atl1c_ioctl -
570 * @netdev:
571 * @ifreq:
572 * @cmd:
573 */
574static 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 */
591static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
592{
593 return 0;
594}
595
596static 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
612static 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 */
644static 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 */
717static 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 */
752static 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 */
786static 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 */
819static 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 */
842static 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
937err_nomem:
938 kfree(tpd_ring->buffer_info);
939 return -ENOMEM;
940}
941
942static 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
1001static 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
1032static 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
1064static 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
1072static 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 */
1116static int atl1c_stop_mac(struct atl1c_hw *hw)
1117{
1118 u32 data;
43250ddd
JY		 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
c930a662 1129 atl1c_wait_until_idle(hw);
43250ddd
JY		 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
c930a662 1135 return (int)atl1c_wait_until_idle(hw);
43250ddd
JY		 1136}
1137
1138static 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
1160static 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 */
1174static 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;
43250ddd
JY		 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 */
c930a662
JP		 1196
1197 if (atl1c_wait_until_idle(hw)) {
43250ddd 1198 dev_err(&pdev->dev,
c930a662 1199 "MAC state machine can't be idle since"
43250ddd
JY		 1200 " disabled for 10ms second\n");
1201 return -1;
1202 }
1203 return 0;
1204}
1205
1206static 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 */
1229static 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
52fbc100 1235 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
43250ddd
JY		 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
52fbc100
JY		 1245 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1246 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
43250ddd 1247 } else {
52fbc100
JY		 1248 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1249 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
43250ddd
JY		 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
1264static 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 */
1309static 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
1367static 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 */
1400static 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
1435static 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
1444static 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 */
1494static 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
1562static 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
1573static 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
1632static 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
1645static 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
1663static 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;
37b76c69 1684 if (unlikely(rfd_num != 1))
43250ddd
JY		 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 }
1693rrs_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
43250ddd
JY		 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 */
1746static 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) {
1759quit_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 */
1774static 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
1784static 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 */
1803static 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
1818static struct atl1c_buffer *
1819atl1c_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*/
1828static 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
1845static 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
1922check_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
1945static 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);
43250ddd
JY		 1983 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1984 }
1985 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1986 buffer_info->length = buf_len - mapped_len;
1987 buffer_info->dma =
1988 pci_map_single(adapter->pdev, skb->data + mapped_len,
1989 buffer_info->length, PCI_DMA_TODEVICE);
1990 buffer_info->state = ATL1_BUFFER_BUSY;
1991
1992 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1993 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1994 }
1995
1996 for (f = 0; f < nr_frags; f++) {
1997 struct skb_frag_struct *frag;
1998
1999 frag = &skb_shinfo(skb)->frags[f];
2000
2001 use_tpd = atl1c_get_tpd(adapter, type);
2002 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2003
2004 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2005 buffer_info->length = frag->size;
2006 buffer_info->dma =
2007 pci_map_page(adapter->pdev, frag->page,
2008 frag->page_offset,
2009 buffer_info->length,
2010 PCI_DMA_TODEVICE);
2011 buffer_info->state = ATL1_BUFFER_BUSY;
2012
2013 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2014 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2015 }
2016
2017 /* The last tpd */
2018 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2019 /* The last buffer info contain the skb address,
2020 so it will be free after unmap */
2021 buffer_info->skb = skb;
2022}
2023
2024static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2025 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2026{
2027 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2028 u32 prod_data;
2029
2030 AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2031 switch (type) {
2032 case atl1c_trans_high:
2033 prod_data &= 0xFFFF0000;
2034 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2035 break;
2036 case atl1c_trans_normal:
2037 prod_data &= 0x0000FFFF;
2038 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2039 break;
2040 default:
2041 break;
2042 }
2043 wmb();
2044 AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2045}
2046
61357325
SH		 2047static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2048 struct net_device *netdev)
43250ddd
JY		 2049{
2050 struct atl1c_adapter *adapter = netdev_priv(netdev);
2051 unsigned long flags;
2052 u16 tpd_req = 1;
2053 struct atl1c_tpd_desc *tpd;
2054 enum atl1c_trans_queue type = atl1c_trans_normal;
2055
2056 if (test_bit(__AT_DOWN, &adapter->flags)) {
2057 dev_kfree_skb_any(skb);
2058 return NETDEV_TX_OK;
2059 }
2060
2061 tpd_req = atl1c_cal_tpd_req(skb);
2062 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2063 if (netif_msg_pktdata(adapter))
2064 dev_info(&adapter->pdev->dev, "tx locked\n");
2065 return NETDEV_TX_LOCKED;
2066 }
2067 if (skb->mark == 0x01)
2068 type = atl1c_trans_high;
2069 else
2070 type = atl1c_trans_normal;
2071
2072 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2073 /* no enough descriptor, just stop queue */
2074 netif_stop_queue(netdev);
2075 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2076 return NETDEV_TX_BUSY;
2077 }
2078
2079 tpd = atl1c_get_tpd(adapter, type);
2080
2081 /* do TSO and check sum */
2082 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2083 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2084 dev_kfree_skb_any(skb);
2085 return NETDEV_TX_OK;
2086 }
2087
2088 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2089 u16 vlan = vlan_tx_tag_get(skb);
2090 __le16 tag;
2091
2092 vlan = cpu_to_le16(vlan);
2093 AT_VLAN_TO_TAG(vlan, tag);
2094 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2095 tpd->vlan_tag = tag;
2096 }
2097
2098 if (skb_network_offset(skb) != ETH_HLEN)
2099 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2100
2101 atl1c_tx_map(adapter, skb, tpd, type);
2102 atl1c_tx_queue(adapter, skb, tpd, type);
2103
43250ddd
JY		 2104 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2105 return NETDEV_TX_OK;
2106}
2107
2108static void atl1c_free_irq(struct atl1c_adapter *adapter)
2109{
2110 struct net_device *netdev = adapter->netdev;
2111
2112 free_irq(adapter->pdev->irq, netdev);
2113
2114 if (adapter->have_msi)
2115 pci_disable_msi(adapter->pdev);
2116}
2117
2118static int atl1c_request_irq(struct atl1c_adapter *adapter)
2119{
2120 struct pci_dev *pdev = adapter->pdev;
2121 struct net_device *netdev = adapter->netdev;
2122 int flags = 0;
2123 int err = 0;
2124
2125 adapter->have_msi = true;
2126 err = pci_enable_msi(adapter->pdev);
2127 if (err) {
2128 if (netif_msg_ifup(adapter))
2129 dev_err(&pdev->dev,
2130 "Unable to allocate MSI interrupt Error: %d\n",
2131 err);
2132 adapter->have_msi = false;
2133 } else
2134 netdev->irq = pdev->irq;
2135
2136 if (!adapter->have_msi)
2137 flags |= IRQF_SHARED;
2138 err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2139 netdev->name, netdev);
2140 if (err) {
2141 if (netif_msg_ifup(adapter))
2142 dev_err(&pdev->dev,
2143 "Unable to allocate interrupt Error: %d\n",
2144 err);
2145 if (adapter->have_msi)
2146 pci_disable_msi(adapter->pdev);
2147 return err;
2148 }
2149 if (netif_msg_ifup(adapter))
2150 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2151 return err;
2152}
2153
2154int atl1c_up(struct atl1c_adapter *adapter)
2155{
2156 struct net_device *netdev = adapter->netdev;
2157 int num;
2158 int err;
2159 int i;
2160
2161 netif_carrier_off(netdev);
2162 atl1c_init_ring_ptrs(adapter);
2163 atl1c_set_multi(netdev);
2164 atl1c_restore_vlan(adapter);
2165
2166 for (i = 0; i < adapter->num_rx_queues; i++) {
2167 num = atl1c_alloc_rx_buffer(adapter, i);
2168 if (unlikely(num == 0)) {
2169 err = -ENOMEM;
2170 goto err_alloc_rx;
2171 }
2172 }
2173
2174 if (atl1c_configure(adapter)) {
2175 err = -EIO;
2176 goto err_up;
2177 }
2178
2179 err = atl1c_request_irq(adapter);
2180 if (unlikely(err))
2181 goto err_up;
2182
2183 clear_bit(__AT_DOWN, &adapter->flags);
2184 napi_enable(&adapter->napi);
2185 atl1c_irq_enable(adapter);
2186 atl1c_check_link_status(adapter);
2187 netif_start_queue(netdev);
2188 return err;
2189
2190err_up:
2191err_alloc_rx:
2192 atl1c_clean_rx_ring(adapter);
2193 return err;
2194}
2195
2196void atl1c_down(struct atl1c_adapter *adapter)
2197{
2198 struct net_device *netdev = adapter->netdev;
2199
2200 atl1c_del_timer(adapter);
2201 atl1c_cancel_work(adapter);
2202
2203 /* signal that we're down so the interrupt handler does not
2204 * reschedule our watchdog timer */
2205 set_bit(__AT_DOWN, &adapter->flags);
2206 netif_carrier_off(netdev);
2207 napi_disable(&adapter->napi);
2208 atl1c_irq_disable(adapter);
2209 atl1c_free_irq(adapter);
2210 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2211 /* reset MAC to disable all RX/TX */
2212 atl1c_reset_mac(&adapter->hw);
2213 msleep(1);
2214
2215 adapter->link_speed = SPEED_0;
2216 adapter->link_duplex = -1;
2217 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2218 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2219 atl1c_clean_rx_ring(adapter);
2220}
2221
2222/*
2223 * atl1c_open - Called when a network interface is made active
2224 * @netdev: network interface device structure
2225 *
2226 * Returns 0 on success, negative value on failure
2227 *
2228 * The open entry point is called when a network interface is made
2229 * active by the system (IFF_UP). At this point all resources needed
2230 * for transmit and receive operations are allocated, the interrupt
2231 * handler is registered with the OS, the watchdog timer is started,
2232 * and the stack is notified that the interface is ready.
2233 */
2234static int atl1c_open(struct net_device *netdev)
2235{
2236 struct atl1c_adapter *adapter = netdev_priv(netdev);
2237 int err;
2238
2239 /* disallow open during test */
2240 if (test_bit(__AT_TESTING, &adapter->flags))
2241 return -EBUSY;
2242
2243 /* allocate rx/tx dma buffer & descriptors */
2244 err = atl1c_setup_ring_resources(adapter);
2245 if (unlikely(err))
2246 return err;
2247
2248 err = atl1c_up(adapter);
2249 if (unlikely(err))
2250 goto err_up;
2251
2252 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2253 u32 phy_data;
2254
2255 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2256 phy_data |= MDIO_AP_EN;
2257 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2258 }
2259 return 0;
2260
2261err_up:
2262 atl1c_free_irq(adapter);
2263 atl1c_free_ring_resources(adapter);
2264 atl1c_reset_mac(&adapter->hw);
2265 return err;
2266}
2267
2268/*
2269 * atl1c_close - Disables a network interface
2270 * @netdev: network interface device structure
2271 *
2272 * Returns 0, this is not allowed to fail
2273 *
2274 * The close entry point is called when an interface is de-activated
2275 * by the OS. The hardware is still under the drivers control, but
2276 * needs to be disabled. A global MAC reset is issued to stop the
2277 * hardware, and all transmit and receive resources are freed.
2278 */
2279static int atl1c_close(struct net_device *netdev)
2280{
2281 struct atl1c_adapter *adapter = netdev_priv(netdev);
2282
2283 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2284 atl1c_down(adapter);
2285 atl1c_free_ring_resources(adapter);
2286 return 0;
2287}
2288
2289static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2290{
2291 struct net_device *netdev = pci_get_drvdata(pdev);
2292 struct atl1c_adapter *adapter = netdev_priv(netdev);
2293 struct atl1c_hw *hw = &adapter->hw;
2294 u32 ctrl;
2295 u32 mac_ctrl_data;
2296 u32 master_ctrl_data;
55865c66 2297 u32 wol_ctrl_data = 0;
43250ddd
JY		 2298 u16 mii_bmsr_data;
2299 u16 save_autoneg_advertised;
2300 u16 mii_intr_status_data;
2301 u32 wufc = adapter->wol;
2302 u32 i;
2303 int retval = 0;
2304
2305 if (netif_running(netdev)) {
2306 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2307 atl1c_down(adapter);
2308 }
2309 netif_device_detach(netdev);
2310 atl1c_disable_l0s_l1(hw);
2311 retval = pci_save_state(pdev);
2312 if (retval)
2313 return retval;
2314 if (wufc) {
2315 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2316 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2317
2318 /* get link status */
2319 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2320 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2321 save_autoneg_advertised = hw->autoneg_advertised;
2322 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2323 if (atl1c_restart_autoneg(hw) != 0)
2324 if (netif_msg_link(adapter))
2325 dev_warn(&pdev->dev, "phy autoneg failed\n");
2326 hw->phy_configured = false; /* re-init PHY when resume */
2327 hw->autoneg_advertised = save_autoneg_advertised;
2328 /* turn on magic packet wol */
2329 if (wufc & AT_WUFC_MAG)
2330 wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2331
2332 if (wufc & AT_WUFC_LNKC) {
2333 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2334 msleep(100);
2335 atl1c_read_phy_reg(hw, MII_BMSR,
2336 (u16 *)&mii_bmsr_data);
2337 if (mii_bmsr_data & BMSR_LSTATUS)
2338 break;
2339 }
2340 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2341 if (netif_msg_link(adapter))
2342 dev_warn(&pdev->dev,
2343 "%s: Link may change"
2344 "when suspend\n",
2345 atl1c_driver_name);
2346 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2347 /* only link up can wake up */
2348 if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2349 if (netif_msg_link(adapter))
2350 dev_err(&pdev->dev,
2351 "%s: read write phy "
2352 "register failed.\n",
2353 atl1c_driver_name);
2354 goto wol_dis;
2355 }
2356 }
2357 /* clear phy interrupt */
2358 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2359 /* Config MAC Ctrl register */
2360 mac_ctrl_data = MAC_CTRL_RX_EN;
2361 /* set to 10/100M halt duplex */
2362 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2363 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2364 MAC_CTRL_PRMLEN_MASK) <<
2365 MAC_CTRL_PRMLEN_SHIFT);
2366
2367 if (adapter->vlgrp)
2368 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2369
2370 /* magic packet maybe Broadcast&multicast&Unicast frame */
2371 if (wufc & AT_WUFC_MAG)
2372 mac_ctrl_data |= MAC_CTRL_BC_EN;
2373
2374 if (netif_msg_hw(adapter))
2375 dev_dbg(&pdev->dev,
2376 "%s: suspend MAC=0x%x\n",
2377 atl1c_driver_name, mac_ctrl_data);
2378 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2379 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2380 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2381
2382 /* pcie patch */
2383 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2384 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2385 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2386
2387 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2388 goto suspend_exit;
2389 }
2390wol_dis:
2391
2392 /* WOL disabled */
2393 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2394
2395 /* pcie patch */
2396 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2397 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2398 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2399
2400 atl1c_phy_disable(hw);
2401 hw->phy_configured = false; /* re-init PHY when resume */
2402
2403 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2404suspend_exit:
2405
2406 pci_disable_device(pdev);
2407 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2408
2409 return 0;
2410}
2411
2412static int atl1c_resume(struct pci_dev *pdev)
2413{
2414 struct net_device *netdev = pci_get_drvdata(pdev);
2415 struct atl1c_adapter *adapter = netdev_priv(netdev);
2416
2417 pci_set_power_state(pdev, PCI_D0);
2418 pci_restore_state(pdev);
2419 pci_enable_wake(pdev, PCI_D3hot, 0);
2420 pci_enable_wake(pdev, PCI_D3cold, 0);
2421
2422 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2423
2424 atl1c_phy_reset(&adapter->hw);
2425 atl1c_reset_mac(&adapter->hw);
2426 netif_device_attach(netdev);
2427 if (netif_running(netdev))
2428 atl1c_up(adapter);
2429
2430 return 0;
2431}
2432
2433static void atl1c_shutdown(struct pci_dev *pdev)
2434{
2435 atl1c_suspend(pdev, PMSG_SUSPEND);
2436}
2437
2438static const struct net_device_ops atl1c_netdev_ops = {
2439 .ndo_open = atl1c_open,
2440 .ndo_stop = atl1c_close,
2441 .ndo_validate_addr = eth_validate_addr,
2442 .ndo_start_xmit = atl1c_xmit_frame,
2443 .ndo_set_mac_address = atl1c_set_mac_addr,
2444 .ndo_set_multicast_list = atl1c_set_multi,
2445 .ndo_change_mtu = atl1c_change_mtu,
2446 .ndo_do_ioctl = atl1c_ioctl,
2447 .ndo_tx_timeout = atl1c_tx_timeout,
2448 .ndo_get_stats = atl1c_get_stats,
2449 .ndo_vlan_rx_register = atl1c_vlan_rx_register,
2450#ifdef CONFIG_NET_POLL_CONTROLLER
2451 .ndo_poll_controller = atl1c_netpoll,
2452#endif
2453};
2454
2455static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2456{
2457 SET_NETDEV_DEV(netdev, &pdev->dev);
2458 pci_set_drvdata(pdev, netdev);
2459
2460 netdev->irq = pdev->irq;
2461 netdev->netdev_ops = &atl1c_netdev_ops;
2462 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2463 atl1c_set_ethtool_ops(netdev);
2464
2465 /* TODO: add when ready */
2466 netdev->features = NETIF_F_SG |
2467 NETIF_F_HW_CSUM |
2468 NETIF_F_HW_VLAN_TX |
2469 NETIF_F_HW_VLAN_RX |
2470 NETIF_F_TSO |
2471 NETIF_F_TSO6;
2472 return 0;
2473}
2474
2475/*
2476 * atl1c_probe - Device Initialization Routine
2477 * @pdev: PCI device information struct
2478 * @ent: entry in atl1c_pci_tbl
2479 *
2480 * Returns 0 on success, negative on failure
2481 *
2482 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2483 * The OS initialization, configuring of the adapter private structure,
2484 * and a hardware reset occur.
2485 */
2486static int __devinit atl1c_probe(struct pci_dev *pdev,
2487 const struct pci_device_id *ent)
2488{
2489 struct net_device *netdev;
2490 struct atl1c_adapter *adapter;
2491 static int cards_found;
2492
2493 int err = 0;
2494
2495 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2496 err = pci_enable_device_mem(pdev);
2497 if (err) {
2498 dev_err(&pdev->dev, "cannot enable PCI device\n");
2499 return err;
2500 }
2501
2502 /*
2503 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2504 * shared register for the high 32 bits, so only a single, aligned,
2505 * 4 GB physical address range can be used at a time.
2506 *
2507 * Supporting 64-bit DMA on this hardware is more trouble than it's
2508 * worth. It is far easier to limit to 32-bit DMA than update
2509 * various kernel subsystems to support the mechanics required by a
2510 * fixed-high-32-bit system.
2511 */
e930438c
YH		 2512 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2513 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
43250ddd
JY		 2514 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2515 goto err_dma;
2516 }
2517
2518 err = pci_request_regions(pdev, atl1c_driver_name);
2519 if (err) {
2520 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2521 goto err_pci_reg;
2522 }
2523
2524 pci_set_master(pdev);
2525
2526 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2527 if (netdev == NULL) {
2528 err = -ENOMEM;
2529 dev_err(&pdev->dev, "etherdev alloc failed\n");
2530 goto err_alloc_etherdev;
2531 }
2532
2533 err = atl1c_init_netdev(netdev, pdev);
2534 if (err) {
2535 dev_err(&pdev->dev, "init netdevice failed\n");
2536 goto err_init_netdev;
2537 }
2538 adapter = netdev_priv(netdev);
2539 adapter->bd_number = cards_found;
2540 adapter->netdev = netdev;
2541 adapter->pdev = pdev;
2542 adapter->hw.adapter = adapter;
2543 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2544 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2545 if (!adapter->hw.hw_addr) {
2546 err = -EIO;
2547 dev_err(&pdev->dev, "cannot map device registers\n");
2548 goto err_ioremap;
2549 }
2550 netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2551
2552 /* init mii data */
2553 adapter->mii.dev = netdev;
2554 adapter->mii.mdio_read = atl1c_mdio_read;
2555 adapter->mii.mdio_write = atl1c_mdio_write;
2556 adapter->mii.phy_id_mask = 0x1f;
2557 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2558 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2559 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2560 (unsigned long)adapter);
2561 /* setup the private structure */
2562 err = atl1c_sw_init(adapter);
2563 if (err) {
2564 dev_err(&pdev->dev, "net device private data init failed\n");
2565 goto err_sw_init;
2566 }
2567 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2568 ATL1C_PCIE_PHY_RESET);
2569
2570 /* Init GPHY as early as possible due to power saving issue */
2571 atl1c_phy_reset(&adapter->hw);
2572
2573 err = atl1c_reset_mac(&adapter->hw);
2574 if (err) {
2575 err = -EIO;
2576 goto err_reset;
2577 }
2578
2579 device_init_wakeup(&pdev->dev, 1);
2580 /* reset the controller to
2581 * put the device in a known good starting state */
2582 err = atl1c_phy_init(&adapter->hw);
2583 if (err) {
2584 err = -EIO;
2585 goto err_reset;
2586 }
2587 if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2588 err = -EIO;
2589 dev_err(&pdev->dev, "get mac address failed\n");
2590 goto err_eeprom;
2591 }
2592 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2593 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2594 if (netif_msg_probe(adapter))
2595 dev_dbg(&pdev->dev,
2596 "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2597 adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2598 adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2599 adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2600
2601 atl1c_hw_set_mac_addr(&adapter->hw);
2602 INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2603 INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2604 err = register_netdev(netdev);
2605 if (err) {
2606 dev_err(&pdev->dev, "register netdevice failed\n");
2607 goto err_register;
2608 }
2609
2610 if (netif_msg_probe(adapter))
2611 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2612 cards_found++;
2613 return 0;
2614
2615err_reset:
2616err_register:
2617err_sw_init:
2618err_eeprom:
2619 iounmap(adapter->hw.hw_addr);
2620err_init_netdev:
2621err_ioremap:
2622 free_netdev(netdev);
2623err_alloc_etherdev:
2624 pci_release_regions(pdev);
2625err_pci_reg:
2626err_dma:
2627 pci_disable_device(pdev);
2628 return err;
2629}
2630
2631/*
2632 * atl1c_remove - Device Removal Routine
2633 * @pdev: PCI device information struct
2634 *
2635 * atl1c_remove is called by the PCI subsystem to alert the driver
2636 * that it should release a PCI device. The could be caused by a
2637 * Hot-Plug event, or because the driver is going to be removed from
2638 * memory.
2639 */
2640static void __devexit atl1c_remove(struct pci_dev *pdev)
2641{
2642 struct net_device *netdev = pci_get_drvdata(pdev);
2643 struct atl1c_adapter *adapter = netdev_priv(netdev);
2644
2645 unregister_netdev(netdev);
2646 atl1c_phy_disable(&adapter->hw);
2647
2648 iounmap(adapter->hw.hw_addr);
2649
2650 pci_release_regions(pdev);
2651 pci_disable_device(pdev);
2652 free_netdev(netdev);
2653}
2654
2655/*
2656 * atl1c_io_error_detected - called when PCI error is detected
2657 * @pdev: Pointer to PCI device
2658 * @state: The current pci connection state
2659 *
2660 * This function is called after a PCI bus error affecting
2661 * this device has been detected.
2662 */
2663static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2664 pci_channel_state_t state)
2665{
2666 struct net_device *netdev = pci_get_drvdata(pdev);
2667 struct atl1c_adapter *adapter = netdev_priv(netdev);
2668
2669 netif_device_detach(netdev);
2670
005fb4f0
DN		 2671 if (state == pci_channel_io_perm_failure)
2672 return PCI_ERS_RESULT_DISCONNECT;
2673
43250ddd
JY		 2674 if (netif_running(netdev))
2675 atl1c_down(adapter);
2676
2677 pci_disable_device(pdev);
2678
2679 /* Request a slot slot reset. */
2680 return PCI_ERS_RESULT_NEED_RESET;
2681}
2682
2683/*
2684 * atl1c_io_slot_reset - called after the pci bus has been reset.
2685 * @pdev: Pointer to PCI device
2686 *
2687 * Restart the card from scratch, as if from a cold-boot. Implementation
2688 * resembles the first-half of the e1000_resume routine.
2689 */
2690static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2691{
2692 struct net_device *netdev = pci_get_drvdata(pdev);
2693 struct atl1c_adapter *adapter = netdev_priv(netdev);
2694
2695 if (pci_enable_device(pdev)) {
2696 if (netif_msg_hw(adapter))
2697 dev_err(&pdev->dev,
2698 "Cannot re-enable PCI device after reset\n");
2699 return PCI_ERS_RESULT_DISCONNECT;
2700 }
2701 pci_set_master(pdev);
2702
2703 pci_enable_wake(pdev, PCI_D3hot, 0);
2704 pci_enable_wake(pdev, PCI_D3cold, 0);
2705
2706 atl1c_reset_mac(&adapter->hw);
2707
2708 return PCI_ERS_RESULT_RECOVERED;
2709}
2710
2711/*
2712 * atl1c_io_resume - called when traffic can start flowing again.
2713 * @pdev: Pointer to PCI device
2714 *
2715 * This callback is called when the error recovery driver tells us that
2716 * its OK to resume normal operation. Implementation resembles the
2717 * second-half of the atl1c_resume routine.
2718 */
2719static void atl1c_io_resume(struct pci_dev *pdev)
2720{
2721 struct net_device *netdev = pci_get_drvdata(pdev);
2722 struct atl1c_adapter *adapter = netdev_priv(netdev);
2723
2724 if (netif_running(netdev)) {
2725 if (atl1c_up(adapter)) {
2726 if (netif_msg_hw(adapter))
2727 dev_err(&pdev->dev,
2728 "Cannot bring device back up after reset\n");
2729 return;
2730 }
2731 }
2732
2733 netif_device_attach(netdev);
2734}
2735
2736static struct pci_error_handlers atl1c_err_handler = {
2737 .error_detected = atl1c_io_error_detected,
2738 .slot_reset = atl1c_io_slot_reset,
2739 .resume = atl1c_io_resume,
2740};
2741
2742static struct pci_driver atl1c_driver = {
2743 .name = atl1c_driver_name,
2744 .id_table = atl1c_pci_tbl,
2745 .probe = atl1c_probe,
2746 .remove = __devexit_p(atl1c_remove),
2747 /* Power Managment Hooks */
2748 .suspend = atl1c_suspend,
2749 .resume = atl1c_resume,
2750 .shutdown = atl1c_shutdown,
2751 .err_handler = &atl1c_err_handler
2752};
2753
2754/*
2755 * atl1c_init_module - Driver Registration Routine
2756 *
2757 * atl1c_init_module is the first routine called when the driver is
2758 * loaded. All it does is register with the PCI subsystem.
2759 */
2760static int __init atl1c_init_module(void)
2761{
2762 return pci_register_driver(&atl1c_driver);
2763}
2764
2765/*
2766 * atl1c_exit_module - Driver Exit Cleanup Routine
2767 *
2768 * atl1c_exit_module is called just before the driver is removed
2769 * from memory.
2770 */
2771static void __exit atl1c_exit_module(void)
2772{
2773 pci_unregister_driver(&atl1c_driver);
2774}
2775
2776module_init(atl1c_init_module);
2777module_exit(atl1c_exit_module);
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