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[mirror_ubuntu-hirsute-kernel.git] / drivers / net / ethernet / atheros / atl1c / atl1c_main.c
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 "1.0.1.1-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27
28 /*
29 * atl1c_pci_tbl - PCI Device ID Table
30 *
31 * Wildcard entries (PCI_ANY_ID) should come last
32 * Last entry must be all 0s
33 *
34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
35 * Class, Class Mask, private data (not used) }
36 */
37 static const struct pci_device_id atl1c_pci_tbl[] = {
38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
44 /* required last entry */
45 { 0 }
46 };
47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
48
49 MODULE_AUTHOR("Jie Yang");
50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
51 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_VERSION(ATL1C_DRV_VERSION);
54
55 static int atl1c_stop_mac(struct atl1c_hw *hw);
56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
60 int *work_done, int work_to_do);
61 static int atl1c_up(struct atl1c_adapter *adapter);
62 static void atl1c_down(struct atl1c_adapter *adapter);
63 static int atl1c_reset_mac(struct atl1c_hw *hw);
64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
65 static int atl1c_configure(struct atl1c_adapter *adapter);
66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
67
68 static const u16 atl1c_pay_load_size[] = {
69 128, 256, 512, 1024, 2048, 4096,
70 };
71
72
73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
74 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
76 {
77 u32 mst_data, data;
78
79 /* pclk sel could switch to 25M */
80 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
81 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
82 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
83
84 /* WoL/PCIE related settings */
85 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
86 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
87 data |= PCIE_PHYMISC_FORCE_RCV_DET;
88 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
89 } else { /* new dev set bit5 of MASTER */
90 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
91 AT_WRITE_REG(hw, REG_MASTER_CTRL,
92 mst_data | MASTER_CTRL_WAKEN_25M);
93 }
94 /* aspm/PCIE setting only for l2cb 1.0 */
95 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
96 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
97 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
98 L2CB1_PCIE_PHYMISC2_CDR_BW);
99 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
100 L2CB1_PCIE_PHYMISC2_L0S_TH);
101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
102 /* extend L1 sync timer */
103 AT_READ_REG(hw, REG_LINK_CTRL, &data);
104 data |= LINK_CTRL_EXT_SYNC;
105 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
106 }
107 /* l2cb 1.x & l1d 1.x */
108 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
109 AT_READ_REG(hw, REG_PM_CTRL, &data);
110 data |= PM_CTRL_L0S_BUFSRX_EN;
111 AT_WRITE_REG(hw, REG_PM_CTRL, data);
112 /* clear vendor msg */
113 AT_READ_REG(hw, REG_DMA_DBG, &data);
114 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
115 }
116 }
117
118 /* FIXME: no need any more ? */
119 /*
120 * atl1c_init_pcie - init PCIE module
121 */
122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
123 {
124 u32 data;
125 u32 pci_cmd;
126 struct pci_dev *pdev = hw->adapter->pdev;
127 int pos;
128
129 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
130 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
131 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
132 PCI_COMMAND_IO);
133 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
134
135 /*
136 * Clear any PowerSaveing Settings
137 */
138 pci_enable_wake(pdev, PCI_D3hot, 0);
139 pci_enable_wake(pdev, PCI_D3cold, 0);
140 /* wol sts read-clear */
141 AT_READ_REG(hw, REG_WOL_CTRL, &data);
142 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
143
144 /*
145 * Mask some pcie error bits
146 */
147 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
148 if (pos) {
149 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
150 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
151 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
152 }
153 /* clear error status */
154 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
155 PCI_EXP_DEVSTA_NFED |
156 PCI_EXP_DEVSTA_FED |
157 PCI_EXP_DEVSTA_CED |
158 PCI_EXP_DEVSTA_URD);
159
160 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
161 data &= ~LTSSM_ID_EN_WRO;
162 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
163
164 atl1c_pcie_patch(hw);
165 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
166 atl1c_disable_l0s_l1(hw);
167
168 msleep(5);
169 }
170
171 /**
172 * atl1c_irq_enable - Enable default interrupt generation settings
173 * @adapter: board private structure
174 */
175 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
176 {
177 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
178 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
179 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
180 AT_WRITE_FLUSH(&adapter->hw);
181 }
182 }
183
184 /**
185 * atl1c_irq_disable - Mask off interrupt generation on the NIC
186 * @adapter: board private structure
187 */
188 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
189 {
190 atomic_inc(&adapter->irq_sem);
191 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
192 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
193 AT_WRITE_FLUSH(&adapter->hw);
194 synchronize_irq(adapter->pdev->irq);
195 }
196
197 /**
198 * atl1c_irq_reset - reset interrupt confiure on the NIC
199 * @adapter: board private structure
200 */
201 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
202 {
203 atomic_set(&adapter->irq_sem, 1);
204 atl1c_irq_enable(adapter);
205 }
206
207 /*
208 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
209 * of the idle status register until the device is actually idle
210 */
211 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
212 {
213 int timeout;
214 u32 data;
215
216 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
217 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
218 if ((data & modu_ctrl) == 0)
219 return 0;
220 msleep(1);
221 }
222 return data;
223 }
224
225 /**
226 * atl1c_phy_config - Timer Call-back
227 * @data: pointer to netdev cast into an unsigned long
228 */
229 static void atl1c_phy_config(unsigned long data)
230 {
231 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
232 struct atl1c_hw *hw = &adapter->hw;
233 unsigned long flags;
234
235 spin_lock_irqsave(&adapter->mdio_lock, flags);
236 atl1c_restart_autoneg(hw);
237 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
238 }
239
240 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
241 {
242 WARN_ON(in_interrupt());
243 atl1c_down(adapter);
244 atl1c_up(adapter);
245 clear_bit(__AT_RESETTING, &adapter->flags);
246 }
247
248 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
249 {
250 struct atl1c_hw *hw = &adapter->hw;
251 struct net_device *netdev = adapter->netdev;
252 struct pci_dev *pdev = adapter->pdev;
253 int err;
254 unsigned long flags;
255 u16 speed, duplex, phy_data;
256
257 spin_lock_irqsave(&adapter->mdio_lock, flags);
258 /* MII_BMSR must read twise */
259 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
260 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
261 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
262
263 if ((phy_data & BMSR_LSTATUS) == 0) {
264 /* link down */
265 netif_carrier_off(netdev);
266 hw->hibernate = true;
267 if (atl1c_reset_mac(hw) != 0)
268 if (netif_msg_hw(adapter))
269 dev_warn(&pdev->dev, "reset mac failed\n");
270 atl1c_set_aspm(hw, SPEED_0);
271 atl1c_post_phy_linkchg(hw, SPEED_0);
272 atl1c_reset_dma_ring(adapter);
273 atl1c_configure(adapter);
274 } else {
275 /* Link Up */
276 hw->hibernate = false;
277 spin_lock_irqsave(&adapter->mdio_lock, flags);
278 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
279 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
280 if (unlikely(err))
281 return;
282 /* link result is our setting */
283 if (adapter->link_speed != speed ||
284 adapter->link_duplex != duplex) {
285 adapter->link_speed = speed;
286 adapter->link_duplex = duplex;
287 atl1c_set_aspm(hw, speed);
288 atl1c_post_phy_linkchg(hw, speed);
289 atl1c_start_mac(adapter);
290 if (netif_msg_link(adapter))
291 dev_info(&pdev->dev,
292 "%s: %s NIC Link is Up<%d Mbps %s>\n",
293 atl1c_driver_name, netdev->name,
294 adapter->link_speed,
295 adapter->link_duplex == FULL_DUPLEX ?
296 "Full Duplex" : "Half Duplex");
297 }
298 if (!netif_carrier_ok(netdev))
299 netif_carrier_on(netdev);
300 }
301 }
302
303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
304 {
305 struct net_device *netdev = adapter->netdev;
306 struct pci_dev *pdev = adapter->pdev;
307 u16 phy_data;
308 u16 link_up;
309
310 spin_lock(&adapter->mdio_lock);
311 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
312 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
313 spin_unlock(&adapter->mdio_lock);
314 link_up = phy_data & BMSR_LSTATUS;
315 /* notify upper layer link down ASAP */
316 if (!link_up) {
317 if (netif_carrier_ok(netdev)) {
318 /* old link state: Up */
319 netif_carrier_off(netdev);
320 if (netif_msg_link(adapter))
321 dev_info(&pdev->dev,
322 "%s: %s NIC Link is Down\n",
323 atl1c_driver_name, netdev->name);
324 adapter->link_speed = SPEED_0;
325 }
326 }
327
328 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
329 schedule_work(&adapter->common_task);
330 }
331
332 static void atl1c_common_task(struct work_struct *work)
333 {
334 struct atl1c_adapter *adapter;
335 struct net_device *netdev;
336
337 adapter = container_of(work, struct atl1c_adapter, common_task);
338 netdev = adapter->netdev;
339
340 if (test_bit(__AT_DOWN, &adapter->flags))
341 return;
342
343 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
344 netif_device_detach(netdev);
345 atl1c_down(adapter);
346 atl1c_up(adapter);
347 netif_device_attach(netdev);
348 }
349
350 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
351 &adapter->work_event)) {
352 atl1c_irq_disable(adapter);
353 atl1c_check_link_status(adapter);
354 atl1c_irq_enable(adapter);
355 }
356 }
357
358
359 static void atl1c_del_timer(struct atl1c_adapter *adapter)
360 {
361 del_timer_sync(&adapter->phy_config_timer);
362 }
363
364
365 /**
366 * atl1c_tx_timeout - Respond to a Tx Hang
367 * @netdev: network interface device structure
368 */
369 static void atl1c_tx_timeout(struct net_device *netdev)
370 {
371 struct atl1c_adapter *adapter = netdev_priv(netdev);
372
373 /* Do the reset outside of interrupt context */
374 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
375 schedule_work(&adapter->common_task);
376 }
377
378 /**
379 * atl1c_set_multi - Multicast and Promiscuous mode set
380 * @netdev: network interface device structure
381 *
382 * The set_multi entry point is called whenever the multicast address
383 * list or the network interface flags are updated. This routine is
384 * responsible for configuring the hardware for proper multicast,
385 * promiscuous mode, and all-multi behavior.
386 */
387 static void atl1c_set_multi(struct net_device *netdev)
388 {
389 struct atl1c_adapter *adapter = netdev_priv(netdev);
390 struct atl1c_hw *hw = &adapter->hw;
391 struct netdev_hw_addr *ha;
392 u32 mac_ctrl_data;
393 u32 hash_value;
394
395 /* Check for Promiscuous and All Multicast modes */
396 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
397
398 if (netdev->flags & IFF_PROMISC) {
399 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
400 } else if (netdev->flags & IFF_ALLMULTI) {
401 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
402 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
403 } else {
404 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
405 }
406
407 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
408
409 /* clear the old settings from the multicast hash table */
410 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
411 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
412
413 /* comoute mc addresses' hash value ,and put it into hash table */
414 netdev_for_each_mc_addr(ha, netdev) {
415 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
416 atl1c_hash_set(hw, hash_value);
417 }
418 }
419
420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
421 {
422 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
423 /* enable VLAN tag insert/strip */
424 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
425 } else {
426 /* disable VLAN tag insert/strip */
427 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
428 }
429 }
430
431 static void atl1c_vlan_mode(struct net_device *netdev,
432 netdev_features_t features)
433 {
434 struct atl1c_adapter *adapter = netdev_priv(netdev);
435 struct pci_dev *pdev = adapter->pdev;
436 u32 mac_ctrl_data = 0;
437
438 if (netif_msg_pktdata(adapter))
439 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
440
441 atl1c_irq_disable(adapter);
442 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
443 __atl1c_vlan_mode(features, &mac_ctrl_data);
444 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
445 atl1c_irq_enable(adapter);
446 }
447
448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
449 {
450 struct pci_dev *pdev = adapter->pdev;
451
452 if (netif_msg_pktdata(adapter))
453 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
454 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
455 }
456
457 /**
458 * atl1c_set_mac - Change the Ethernet Address of the NIC
459 * @netdev: network interface device structure
460 * @p: pointer to an address structure
461 *
462 * Returns 0 on success, negative on failure
463 */
464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
465 {
466 struct atl1c_adapter *adapter = netdev_priv(netdev);
467 struct sockaddr *addr = p;
468
469 if (!is_valid_ether_addr(addr->sa_data))
470 return -EADDRNOTAVAIL;
471
472 if (netif_running(netdev))
473 return -EBUSY;
474
475 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
476 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
477
478 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
479
480 return 0;
481 }
482
483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
484 struct net_device *dev)
485 {
486 unsigned int head_size;
487 int mtu = dev->mtu;
488
489 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
490 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
491
492 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
493 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
494 adapter->rx_frag_size = roundup_pow_of_two(head_size);
495 }
496
497 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
498 netdev_features_t features)
499 {
500 /*
501 * Since there is no support for separate rx/tx vlan accel
502 * enable/disable make sure tx flag is always in same state as rx.
503 */
504 if (features & NETIF_F_HW_VLAN_CTAG_RX)
505 features |= NETIF_F_HW_VLAN_CTAG_TX;
506 else
507 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
508
509 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
510 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
511
512 return features;
513 }
514
515 static int atl1c_set_features(struct net_device *netdev,
516 netdev_features_t features)
517 {
518 netdev_features_t changed = netdev->features ^ features;
519
520 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
521 atl1c_vlan_mode(netdev, features);
522
523 return 0;
524 }
525
526 /**
527 * atl1c_change_mtu - Change the Maximum Transfer Unit
528 * @netdev: network interface device structure
529 * @new_mtu: new value for maximum frame size
530 *
531 * Returns 0 on success, negative on failure
532 */
533 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
534 {
535 struct atl1c_adapter *adapter = netdev_priv(netdev);
536 struct atl1c_hw *hw = &adapter->hw;
537 int old_mtu = netdev->mtu;
538 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
539
540 /* Fast Ethernet controller doesn't support jumbo packet */
541 if (((hw->nic_type == athr_l2c ||
542 hw->nic_type == athr_l2c_b ||
543 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
544 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
545 max_frame > MAX_JUMBO_FRAME_SIZE) {
546 if (netif_msg_link(adapter))
547 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
548 return -EINVAL;
549 }
550 /* set MTU */
551 if (old_mtu != new_mtu && netif_running(netdev)) {
552 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
553 msleep(1);
554 netdev->mtu = new_mtu;
555 adapter->hw.max_frame_size = new_mtu;
556 atl1c_set_rxbufsize(adapter, netdev);
557 atl1c_down(adapter);
558 netdev_update_features(netdev);
559 atl1c_up(adapter);
560 clear_bit(__AT_RESETTING, &adapter->flags);
561 }
562 return 0;
563 }
564
565 /*
566 * caller should hold mdio_lock
567 */
568 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
569 {
570 struct atl1c_adapter *adapter = netdev_priv(netdev);
571 u16 result;
572
573 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
574 return result;
575 }
576
577 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
578 int reg_num, int val)
579 {
580 struct atl1c_adapter *adapter = netdev_priv(netdev);
581
582 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
583 }
584
585 static int atl1c_mii_ioctl(struct net_device *netdev,
586 struct ifreq *ifr, int cmd)
587 {
588 struct atl1c_adapter *adapter = netdev_priv(netdev);
589 struct pci_dev *pdev = adapter->pdev;
590 struct mii_ioctl_data *data = if_mii(ifr);
591 unsigned long flags;
592 int retval = 0;
593
594 if (!netif_running(netdev))
595 return -EINVAL;
596
597 spin_lock_irqsave(&adapter->mdio_lock, flags);
598 switch (cmd) {
599 case SIOCGMIIPHY:
600 data->phy_id = 0;
601 break;
602
603 case SIOCGMIIREG:
604 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
605 &data->val_out)) {
606 retval = -EIO;
607 goto out;
608 }
609 break;
610
611 case SIOCSMIIREG:
612 if (data->reg_num & ~(0x1F)) {
613 retval = -EFAULT;
614 goto out;
615 }
616
617 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
618 data->reg_num, data->val_in);
619 if (atl1c_write_phy_reg(&adapter->hw,
620 data->reg_num, data->val_in)) {
621 retval = -EIO;
622 goto out;
623 }
624 break;
625
626 default:
627 retval = -EOPNOTSUPP;
628 break;
629 }
630 out:
631 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
632 return retval;
633 }
634
635 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
636 {
637 switch (cmd) {
638 case SIOCGMIIPHY:
639 case SIOCGMIIREG:
640 case SIOCSMIIREG:
641 return atl1c_mii_ioctl(netdev, ifr, cmd);
642 default:
643 return -EOPNOTSUPP;
644 }
645 }
646
647 /**
648 * atl1c_alloc_queues - Allocate memory for all rings
649 * @adapter: board private structure to initialize
650 *
651 */
652 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
653 {
654 return 0;
655 }
656
657 static void atl1c_set_mac_type(struct atl1c_hw *hw)
658 {
659 switch (hw->device_id) {
660 case PCI_DEVICE_ID_ATTANSIC_L2C:
661 hw->nic_type = athr_l2c;
662 break;
663 case PCI_DEVICE_ID_ATTANSIC_L1C:
664 hw->nic_type = athr_l1c;
665 break;
666 case PCI_DEVICE_ID_ATHEROS_L2C_B:
667 hw->nic_type = athr_l2c_b;
668 break;
669 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
670 hw->nic_type = athr_l2c_b2;
671 break;
672 case PCI_DEVICE_ID_ATHEROS_L1D:
673 hw->nic_type = athr_l1d;
674 break;
675 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
676 hw->nic_type = athr_l1d_2;
677 break;
678 default:
679 break;
680 }
681 }
682
683 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
684 {
685 u32 link_ctrl_data;
686
687 atl1c_set_mac_type(hw);
688 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
689
690 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
691 ATL1C_TXQ_MODE_ENHANCE;
692 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
693 ATL1C_ASPM_L1_SUPPORT;
694 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
695
696 if (hw->nic_type == athr_l1c ||
697 hw->nic_type == athr_l1d ||
698 hw->nic_type == athr_l1d_2)
699 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
700 return 0;
701 }
702
703 struct atl1c_platform_patch {
704 u16 pci_did;
705 u8 pci_revid;
706 u16 subsystem_vid;
707 u16 subsystem_did;
708 u32 patch_flag;
709 #define ATL1C_LINK_PATCH 0x1
710 };
711 static const struct atl1c_platform_patch plats[] = {
712 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
713 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
714 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
715 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
716 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
717 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
718 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
719 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
720 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
721 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
722 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
723 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
724 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
725 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
726 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
727 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
728 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
729 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
730 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
731 {0},
732 };
733
734 static void atl1c_patch_assign(struct atl1c_hw *hw)
735 {
736 struct pci_dev *pdev = hw->adapter->pdev;
737 u32 misc_ctrl;
738 int i = 0;
739
740 hw->msi_lnkpatch = false;
741
742 while (plats[i].pci_did != 0) {
743 if (plats[i].pci_did == hw->device_id &&
744 plats[i].pci_revid == hw->revision_id &&
745 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
746 plats[i].subsystem_did == hw->subsystem_id) {
747 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
748 hw->msi_lnkpatch = true;
749 }
750 i++;
751 }
752
753 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
754 hw->revision_id == L2CB_V21) {
755 /* config access mode */
756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
757 REG_PCIE_DEV_MISC_CTRL);
758 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
759 misc_ctrl &= ~0x100;
760 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
761 REG_PCIE_DEV_MISC_CTRL);
762 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
763 }
764 }
765 /**
766 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
767 * @adapter: board private structure to initialize
768 *
769 * atl1c_sw_init initializes the Adapter private data structure.
770 * Fields are initialized based on PCI device information and
771 * OS network device settings (MTU size).
772 */
773 static int atl1c_sw_init(struct atl1c_adapter *adapter)
774 {
775 struct atl1c_hw *hw = &adapter->hw;
776 struct pci_dev *pdev = adapter->pdev;
777 u32 revision;
778
779
780 adapter->wol = 0;
781 device_set_wakeup_enable(&pdev->dev, false);
782 adapter->link_speed = SPEED_0;
783 adapter->link_duplex = FULL_DUPLEX;
784 adapter->tpd_ring[0].count = 1024;
785 adapter->rfd_ring.count = 512;
786
787 hw->vendor_id = pdev->vendor;
788 hw->device_id = pdev->device;
789 hw->subsystem_vendor_id = pdev->subsystem_vendor;
790 hw->subsystem_id = pdev->subsystem_device;
791 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
792 hw->revision_id = revision & 0xFF;
793 /* before link up, we assume hibernate is true */
794 hw->hibernate = true;
795 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
796 if (atl1c_setup_mac_funcs(hw) != 0) {
797 dev_err(&pdev->dev, "set mac function pointers failed\n");
798 return -1;
799 }
800 atl1c_patch_assign(hw);
801
802 hw->intr_mask = IMR_NORMAL_MASK;
803 hw->phy_configured = false;
804 hw->preamble_len = 7;
805 hw->max_frame_size = adapter->netdev->mtu;
806 hw->autoneg_advertised = ADVERTISED_Autoneg;
807 hw->indirect_tab = 0xE4E4E4E4;
808 hw->base_cpu = 0;
809
810 hw->ict = 50000; /* 100ms */
811 hw->smb_timer = 200000; /* 400ms */
812 hw->rx_imt = 200;
813 hw->tx_imt = 1000;
814
815 hw->tpd_burst = 5;
816 hw->rfd_burst = 8;
817 hw->dma_order = atl1c_dma_ord_out;
818 hw->dmar_block = atl1c_dma_req_1024;
819
820 if (atl1c_alloc_queues(adapter)) {
821 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
822 return -ENOMEM;
823 }
824 /* TODO */
825 atl1c_set_rxbufsize(adapter, adapter->netdev);
826 atomic_set(&adapter->irq_sem, 1);
827 spin_lock_init(&adapter->mdio_lock);
828 spin_lock_init(&adapter->tx_lock);
829 set_bit(__AT_DOWN, &adapter->flags);
830
831 return 0;
832 }
833
834 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
835 struct atl1c_buffer *buffer_info)
836 {
837 u16 pci_driection;
838 if (buffer_info->flags & ATL1C_BUFFER_FREE)
839 return;
840 if (buffer_info->dma) {
841 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
842 pci_driection = PCI_DMA_FROMDEVICE;
843 else
844 pci_driection = PCI_DMA_TODEVICE;
845
846 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
847 pci_unmap_single(pdev, buffer_info->dma,
848 buffer_info->length, pci_driection);
849 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
850 pci_unmap_page(pdev, buffer_info->dma,
851 buffer_info->length, pci_driection);
852 }
853 if (buffer_info->skb)
854 dev_consume_skb_any(buffer_info->skb);
855 buffer_info->dma = 0;
856 buffer_info->skb = NULL;
857 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
858 }
859 /**
860 * atl1c_clean_tx_ring - Free Tx-skb
861 * @adapter: board private structure
862 */
863 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
864 enum atl1c_trans_queue type)
865 {
866 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
867 struct atl1c_buffer *buffer_info;
868 struct pci_dev *pdev = adapter->pdev;
869 u16 index, ring_count;
870
871 ring_count = tpd_ring->count;
872 for (index = 0; index < ring_count; index++) {
873 buffer_info = &tpd_ring->buffer_info[index];
874 atl1c_clean_buffer(pdev, buffer_info);
875 }
876
877 netdev_reset_queue(adapter->netdev);
878
879 /* Zero out Tx-buffers */
880 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
881 ring_count);
882 atomic_set(&tpd_ring->next_to_clean, 0);
883 tpd_ring->next_to_use = 0;
884 }
885
886 /**
887 * atl1c_clean_rx_ring - Free rx-reservation skbs
888 * @adapter: board private structure
889 */
890 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
891 {
892 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
893 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
894 struct atl1c_buffer *buffer_info;
895 struct pci_dev *pdev = adapter->pdev;
896 int j;
897
898 for (j = 0; j < rfd_ring->count; j++) {
899 buffer_info = &rfd_ring->buffer_info[j];
900 atl1c_clean_buffer(pdev, buffer_info);
901 }
902 /* zero out the descriptor ring */
903 memset(rfd_ring->desc, 0, rfd_ring->size);
904 rfd_ring->next_to_clean = 0;
905 rfd_ring->next_to_use = 0;
906 rrd_ring->next_to_use = 0;
907 rrd_ring->next_to_clean = 0;
908 }
909
910 /*
911 * Read / Write Ptr Initialize:
912 */
913 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
914 {
915 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
916 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
917 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
918 struct atl1c_buffer *buffer_info;
919 int i, j;
920
921 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
922 tpd_ring[i].next_to_use = 0;
923 atomic_set(&tpd_ring[i].next_to_clean, 0);
924 buffer_info = tpd_ring[i].buffer_info;
925 for (j = 0; j < tpd_ring->count; j++)
926 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
927 ATL1C_BUFFER_FREE);
928 }
929 rfd_ring->next_to_use = 0;
930 rfd_ring->next_to_clean = 0;
931 rrd_ring->next_to_use = 0;
932 rrd_ring->next_to_clean = 0;
933 for (j = 0; j < rfd_ring->count; j++) {
934 buffer_info = &rfd_ring->buffer_info[j];
935 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
936 }
937 }
938
939 /**
940 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
941 * @adapter: board private structure
942 *
943 * Free all transmit software resources
944 */
945 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
946 {
947 struct pci_dev *pdev = adapter->pdev;
948
949 pci_free_consistent(pdev, adapter->ring_header.size,
950 adapter->ring_header.desc,
951 adapter->ring_header.dma);
952 adapter->ring_header.desc = NULL;
953
954 /* Note: just free tdp_ring.buffer_info,
955 * it contain rfd_ring.buffer_info, do not double free */
956 if (adapter->tpd_ring[0].buffer_info) {
957 kfree(adapter->tpd_ring[0].buffer_info);
958 adapter->tpd_ring[0].buffer_info = NULL;
959 }
960 if (adapter->rx_page) {
961 put_page(adapter->rx_page);
962 adapter->rx_page = NULL;
963 }
964 }
965
966 /**
967 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
968 * @adapter: board private structure
969 *
970 * Return 0 on success, negative on failure
971 */
972 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
973 {
974 struct pci_dev *pdev = adapter->pdev;
975 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
976 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
977 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
978 struct atl1c_ring_header *ring_header = &adapter->ring_header;
979 int size;
980 int i;
981 int count = 0;
982 int rx_desc_count = 0;
983 u32 offset = 0;
984
985 rrd_ring->count = rfd_ring->count;
986 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
987 tpd_ring[i].count = tpd_ring[0].count;
988
989 /* 2 tpd queue, one high priority queue,
990 * another normal priority queue */
991 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
992 rfd_ring->count);
993 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
994 if (unlikely(!tpd_ring->buffer_info))
995 goto err_nomem;
996
997 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
998 tpd_ring[i].buffer_info =
999 (tpd_ring->buffer_info + count);
1000 count += tpd_ring[i].count;
1001 }
1002
1003 rfd_ring->buffer_info =
1004 (tpd_ring->buffer_info + count);
1005 count += rfd_ring->count;
1006 rx_desc_count += rfd_ring->count;
1007
1008 /*
1009 * real ring DMA buffer
1010 * each ring/block may need up to 8 bytes for alignment, hence the
1011 * additional bytes tacked onto the end.
1012 */
1013 ring_header->size = size =
1014 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1015 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1016 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1017 8 * 4;
1018
1019 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1020 &ring_header->dma);
1021 if (unlikely(!ring_header->desc)) {
1022 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1023 goto err_nomem;
1024 }
1025 memset(ring_header->desc, 0, ring_header->size);
1026 /* init TPD ring */
1027
1028 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1029 offset = tpd_ring[0].dma - ring_header->dma;
1030 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1031 tpd_ring[i].dma = ring_header->dma + offset;
1032 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1033 tpd_ring[i].size =
1034 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1035 offset += roundup(tpd_ring[i].size, 8);
1036 }
1037 /* init RFD ring */
1038 rfd_ring->dma = ring_header->dma + offset;
1039 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1040 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1041 offset += roundup(rfd_ring->size, 8);
1042
1043 /* init RRD ring */
1044 rrd_ring->dma = ring_header->dma + offset;
1045 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1046 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1047 rrd_ring->count;
1048 offset += roundup(rrd_ring->size, 8);
1049
1050 return 0;
1051
1052 err_nomem:
1053 kfree(tpd_ring->buffer_info);
1054 return -ENOMEM;
1055 }
1056
1057 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1058 {
1059 struct atl1c_hw *hw = &adapter->hw;
1060 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1061 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1062 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1063 adapter->tpd_ring;
1064
1065 /* TPD */
1066 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1067 (u32)((tpd_ring[atl1c_trans_normal].dma &
1068 AT_DMA_HI_ADDR_MASK) >> 32));
1069 /* just enable normal priority TX queue */
1070 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1071 (u32)(tpd_ring[atl1c_trans_normal].dma &
1072 AT_DMA_LO_ADDR_MASK));
1073 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1074 (u32)(tpd_ring[atl1c_trans_high].dma &
1075 AT_DMA_LO_ADDR_MASK));
1076 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1077 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1078
1079
1080 /* RFD */
1081 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1082 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1083 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1084 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1085
1086 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1087 rfd_ring->count & RFD_RING_SIZE_MASK);
1088 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1089 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1090
1091 /* RRD */
1092 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1093 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1094 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1095 (rrd_ring->count & RRD_RING_SIZE_MASK));
1096
1097 if (hw->nic_type == athr_l2c_b) {
1098 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1099 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1100 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1101 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1102 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1103 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1104 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1105 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1106 }
1107 /* Load all of base address above */
1108 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1109 }
1110
1111 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1112 {
1113 struct atl1c_hw *hw = &adapter->hw;
1114 int max_pay_load;
1115 u16 tx_offload_thresh;
1116 u32 txq_ctrl_data;
1117
1118 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1119 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1120 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1121 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1122 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1123 /*
1124 * if BIOS had changed the dam-read-max-length to an invalid value,
1125 * restore it to default value
1126 */
1127 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1128 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1129 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1130 }
1131 txq_ctrl_data =
1132 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1133 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1134
1135 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1136 }
1137
1138 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1139 {
1140 struct atl1c_hw *hw = &adapter->hw;
1141 u32 rxq_ctrl_data;
1142
1143 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1144 RXQ_RFD_BURST_NUM_SHIFT;
1145
1146 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1147 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1148
1149 /* aspm for gigabit */
1150 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1151 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1152 ASPM_THRUPUT_LIMIT_100M);
1153
1154 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1155 }
1156
1157 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1158 {
1159 struct atl1c_hw *hw = &adapter->hw;
1160 u32 dma_ctrl_data;
1161
1162 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1163 DMA_CTRL_RREQ_PRI_DATA |
1164 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1165 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1166 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1167
1168 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1169 }
1170
1171 /*
1172 * Stop the mac, transmit and receive units
1173 * hw - Struct containing variables accessed by shared code
1174 * return : 0 or idle status (if error)
1175 */
1176 static int atl1c_stop_mac(struct atl1c_hw *hw)
1177 {
1178 u32 data;
1179
1180 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1181 data &= ~RXQ_CTRL_EN;
1182 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1183
1184 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1185 data &= ~TXQ_CTRL_EN;
1186 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1187
1188 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1189
1190 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1191 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1192 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1193
1194 return (int)atl1c_wait_until_idle(hw,
1195 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1196 }
1197
1198 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1199 {
1200 struct atl1c_hw *hw = &adapter->hw;
1201 u32 mac, txq, rxq;
1202
1203 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1204 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1205 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1206
1207 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1208 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1209 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1210
1211 txq |= TXQ_CTRL_EN;
1212 rxq |= RXQ_CTRL_EN;
1213 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1214 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1215 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1216 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1217 MAC_CTRL_HASH_ALG_CRC32;
1218 if (hw->mac_duplex)
1219 mac |= MAC_CTRL_DUPLX;
1220 else
1221 mac &= ~MAC_CTRL_DUPLX;
1222 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1223 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1224
1225 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1226 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1227 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1228 }
1229
1230 /*
1231 * Reset the transmit and receive units; mask and clear all interrupts.
1232 * hw - Struct containing variables accessed by shared code
1233 * return : 0 or idle status (if error)
1234 */
1235 static int atl1c_reset_mac(struct atl1c_hw *hw)
1236 {
1237 struct atl1c_adapter *adapter = hw->adapter;
1238 struct pci_dev *pdev = adapter->pdev;
1239 u32 ctrl_data = 0;
1240
1241 atl1c_stop_mac(hw);
1242 /*
1243 * Issue Soft Reset to the MAC. This will reset the chip's
1244 * transmit, receive, DMA. It will not effect
1245 * the current PCI configuration. The global reset bit is self-
1246 * clearing, and should clear within a microsecond.
1247 */
1248 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1249 ctrl_data |= MASTER_CTRL_OOB_DIS;
1250 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1251
1252 AT_WRITE_FLUSH(hw);
1253 msleep(10);
1254 /* Wait at least 10ms for All module to be Idle */
1255
1256 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1257 dev_err(&pdev->dev,
1258 "MAC state machine can't be idle since"
1259 " disabled for 10ms second\n");
1260 return -1;
1261 }
1262 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1263
1264 /* driver control speed/duplex */
1265 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1266 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1267
1268 /* clk switch setting */
1269 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1270 switch (hw->nic_type) {
1271 case athr_l2c_b:
1272 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1273 SERDES_MAC_CLK_SLOWDOWN);
1274 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1275 break;
1276 case athr_l2c_b2:
1277 case athr_l1d_2:
1278 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1279 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1280 break;
1281 default:
1282 break;
1283 }
1284
1285 return 0;
1286 }
1287
1288 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1289 {
1290 u16 ctrl_flags = hw->ctrl_flags;
1291
1292 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1293 atl1c_set_aspm(hw, SPEED_0);
1294 hw->ctrl_flags = ctrl_flags;
1295 }
1296
1297 /*
1298 * Set ASPM state.
1299 * Enable/disable L0s/L1 depend on link state.
1300 */
1301 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1302 {
1303 u32 pm_ctrl_data;
1304 u32 link_l1_timer;
1305
1306 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1307 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1308 PM_CTRL_ASPM_L0S_EN |
1309 PM_CTRL_MAC_ASPM_CHK);
1310 /* L1 timer */
1311 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1312 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1313 link_l1_timer =
1314 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1315 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1316 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1317 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1318 } else {
1319 link_l1_timer = hw->nic_type == athr_l2c_b ?
1320 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1321 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1322 link_l1_timer = 1;
1323 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1324 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1325 }
1326
1327 /* L0S/L1 enable */
1328 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1329 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1330 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1331 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1332
1333 /* l2cb & l1d & l2cb2 & l1d2 */
1334 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1335 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1336 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1337 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1338 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1339 PM_CTRL_SERDES_PD_EX_L1 |
1340 PM_CTRL_CLK_SWH_L1;
1341 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1342 PM_CTRL_SERDES_PLL_L1_EN |
1343 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1344 PM_CTRL_SA_DLY_EN |
1345 PM_CTRL_HOTRST);
1346 /* disable l0s if link down or l2cb */
1347 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1348 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1349 } else { /* l1c */
1350 pm_ctrl_data =
1351 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1352 if (link_speed != SPEED_0) {
1353 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1354 PM_CTRL_SERDES_PLL_L1_EN |
1355 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1356 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1357 PM_CTRL_CLK_SWH_L1 |
1358 PM_CTRL_ASPM_L0S_EN |
1359 PM_CTRL_ASPM_L1_EN);
1360 } else { /* link down */
1361 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1362 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1363 PM_CTRL_SERDES_PLL_L1_EN |
1364 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1365 PM_CTRL_ASPM_L0S_EN);
1366 }
1367 }
1368 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1369
1370 return;
1371 }
1372
1373 /**
1374 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1375 * @adapter: board private structure
1376 *
1377 * Configure the Tx /Rx unit of the MAC after a reset.
1378 */
1379 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1380 {
1381 struct atl1c_hw *hw = &adapter->hw;
1382 u32 master_ctrl_data = 0;
1383 u32 intr_modrt_data;
1384 u32 data;
1385
1386 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1387 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1388 MASTER_CTRL_RX_ITIMER_EN |
1389 MASTER_CTRL_INT_RDCLR);
1390 /* clear interrupt status */
1391 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1392 /* Clear any WOL status */
1393 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1394 /* set Interrupt Clear Timer
1395 * HW will enable self to assert interrupt event to system after
1396 * waiting x-time for software to notify it accept interrupt.
1397 */
1398
1399 data = CLK_GATING_EN_ALL;
1400 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1401 if (hw->nic_type == athr_l2c_b)
1402 data &= ~CLK_GATING_RXMAC_EN;
1403 } else
1404 data = 0;
1405 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1406
1407 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1408 hw->ict & INT_RETRIG_TIMER_MASK);
1409
1410 atl1c_configure_des_ring(adapter);
1411
1412 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1413 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1414 IRQ_MODRT_TX_TIMER_SHIFT;
1415 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1416 IRQ_MODRT_RX_TIMER_SHIFT;
1417 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1418 master_ctrl_data |=
1419 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1420 }
1421
1422 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1423 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1424
1425 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1426 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1427
1428 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1429 hw->smb_timer & SMB_STAT_TIMER_MASK);
1430
1431 /* set MTU */
1432 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1433 VLAN_HLEN + ETH_FCS_LEN);
1434
1435 atl1c_configure_tx(adapter);
1436 atl1c_configure_rx(adapter);
1437 atl1c_configure_dma(adapter);
1438
1439 return 0;
1440 }
1441
1442 static int atl1c_configure(struct atl1c_adapter *adapter)
1443 {
1444 struct net_device *netdev = adapter->netdev;
1445 int num;
1446
1447 atl1c_init_ring_ptrs(adapter);
1448 atl1c_set_multi(netdev);
1449 atl1c_restore_vlan(adapter);
1450
1451 num = atl1c_alloc_rx_buffer(adapter);
1452 if (unlikely(num == 0))
1453 return -ENOMEM;
1454
1455 if (atl1c_configure_mac(adapter))
1456 return -EIO;
1457
1458 return 0;
1459 }
1460
1461 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1462 {
1463 u16 hw_reg_addr = 0;
1464 unsigned long *stats_item = NULL;
1465 u32 data;
1466
1467 /* update rx status */
1468 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1469 stats_item = &adapter->hw_stats.rx_ok;
1470 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1471 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1472 *stats_item += data;
1473 stats_item++;
1474 hw_reg_addr += 4;
1475 }
1476 /* update tx status */
1477 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1478 stats_item = &adapter->hw_stats.tx_ok;
1479 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1480 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1481 *stats_item += data;
1482 stats_item++;
1483 hw_reg_addr += 4;
1484 }
1485 }
1486
1487 /**
1488 * atl1c_get_stats - Get System Network Statistics
1489 * @netdev: network interface device structure
1490 *
1491 * Returns the address of the device statistics structure.
1492 * The statistics are actually updated from the timer callback.
1493 */
1494 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1495 {
1496 struct atl1c_adapter *adapter = netdev_priv(netdev);
1497 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1498 struct net_device_stats *net_stats = &netdev->stats;
1499
1500 atl1c_update_hw_stats(adapter);
1501 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1502 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1503 net_stats->multicast = hw_stats->rx_mcast;
1504 net_stats->collisions = hw_stats->tx_1_col +
1505 hw_stats->tx_2_col +
1506 hw_stats->tx_late_col +
1507 hw_stats->tx_abort_col;
1508
1509 net_stats->rx_errors = hw_stats->rx_frag +
1510 hw_stats->rx_fcs_err +
1511 hw_stats->rx_len_err +
1512 hw_stats->rx_sz_ov +
1513 hw_stats->rx_rrd_ov +
1514 hw_stats->rx_align_err +
1515 hw_stats->rx_rxf_ov;
1516
1517 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1518 net_stats->rx_length_errors = hw_stats->rx_len_err;
1519 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1520 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1521 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1522
1523 net_stats->tx_errors = hw_stats->tx_late_col +
1524 hw_stats->tx_abort_col +
1525 hw_stats->tx_underrun +
1526 hw_stats->tx_trunc;
1527
1528 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1529 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1530 net_stats->tx_window_errors = hw_stats->tx_late_col;
1531
1532 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1533 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1534
1535 return net_stats;
1536 }
1537
1538 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1539 {
1540 u16 phy_data;
1541
1542 spin_lock(&adapter->mdio_lock);
1543 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1544 spin_unlock(&adapter->mdio_lock);
1545 }
1546
1547 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1548 enum atl1c_trans_queue type)
1549 {
1550 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1551 struct atl1c_buffer *buffer_info;
1552 struct pci_dev *pdev = adapter->pdev;
1553 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1554 u16 hw_next_to_clean;
1555 u16 reg;
1556 unsigned int total_bytes = 0, total_packets = 0;
1557
1558 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1559
1560 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1561
1562 while (next_to_clean != hw_next_to_clean) {
1563 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1564 if (buffer_info->skb) {
1565 total_bytes += buffer_info->skb->len;
1566 total_packets++;
1567 }
1568 atl1c_clean_buffer(pdev, buffer_info);
1569 if (++next_to_clean == tpd_ring->count)
1570 next_to_clean = 0;
1571 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1572 }
1573
1574 netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1575
1576 if (netif_queue_stopped(adapter->netdev) &&
1577 netif_carrier_ok(adapter->netdev)) {
1578 netif_wake_queue(adapter->netdev);
1579 }
1580
1581 return true;
1582 }
1583
1584 /**
1585 * atl1c_intr - Interrupt Handler
1586 * @irq: interrupt number
1587 * @data: pointer to a network interface device structure
1588 */
1589 static irqreturn_t atl1c_intr(int irq, void *data)
1590 {
1591 struct net_device *netdev = data;
1592 struct atl1c_adapter *adapter = netdev_priv(netdev);
1593 struct pci_dev *pdev = adapter->pdev;
1594 struct atl1c_hw *hw = &adapter->hw;
1595 int max_ints = AT_MAX_INT_WORK;
1596 int handled = IRQ_NONE;
1597 u32 status;
1598 u32 reg_data;
1599
1600 do {
1601 AT_READ_REG(hw, REG_ISR, &reg_data);
1602 status = reg_data & hw->intr_mask;
1603
1604 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1605 if (max_ints != AT_MAX_INT_WORK)
1606 handled = IRQ_HANDLED;
1607 break;
1608 }
1609 /* link event */
1610 if (status & ISR_GPHY)
1611 atl1c_clear_phy_int(adapter);
1612 /* Ack ISR */
1613 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1614 if (status & ISR_RX_PKT) {
1615 if (likely(napi_schedule_prep(&adapter->napi))) {
1616 hw->intr_mask &= ~ISR_RX_PKT;
1617 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1618 __napi_schedule(&adapter->napi);
1619 }
1620 }
1621 if (status & ISR_TX_PKT)
1622 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1623
1624 handled = IRQ_HANDLED;
1625 /* check if PCIE PHY Link down */
1626 if (status & ISR_ERROR) {
1627 if (netif_msg_hw(adapter))
1628 dev_err(&pdev->dev,
1629 "atl1c hardware error (status = 0x%x)\n",
1630 status & ISR_ERROR);
1631 /* reset MAC */
1632 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1633 schedule_work(&adapter->common_task);
1634 return IRQ_HANDLED;
1635 }
1636
1637 if (status & ISR_OVER)
1638 if (netif_msg_intr(adapter))
1639 dev_warn(&pdev->dev,
1640 "TX/RX overflow (status = 0x%x)\n",
1641 status & ISR_OVER);
1642
1643 /* link event */
1644 if (status & (ISR_GPHY | ISR_MANUAL)) {
1645 netdev->stats.tx_carrier_errors++;
1646 atl1c_link_chg_event(adapter);
1647 break;
1648 }
1649
1650 } while (--max_ints > 0);
1651 /* re-enable Interrupt*/
1652 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1653 return handled;
1654 }
1655
1656 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1657 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1658 {
1659 /*
1660 * The pid field in RRS in not correct sometimes, so we
1661 * cannot figure out if the packet is fragmented or not,
1662 * so we tell the KERNEL CHECKSUM_NONE
1663 */
1664 skb_checksum_none_assert(skb);
1665 }
1666
1667 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1668 {
1669 struct sk_buff *skb;
1670 struct page *page;
1671
1672 if (adapter->rx_frag_size > PAGE_SIZE)
1673 return netdev_alloc_skb(adapter->netdev,
1674 adapter->rx_buffer_len);
1675
1676 page = adapter->rx_page;
1677 if (!page) {
1678 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1679 if (unlikely(!page))
1680 return NULL;
1681 adapter->rx_page_offset = 0;
1682 }
1683
1684 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1685 adapter->rx_frag_size);
1686 if (likely(skb)) {
1687 adapter->rx_page_offset += adapter->rx_frag_size;
1688 if (adapter->rx_page_offset >= PAGE_SIZE)
1689 adapter->rx_page = NULL;
1690 else
1691 get_page(page);
1692 }
1693 return skb;
1694 }
1695
1696 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1697 {
1698 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1699 struct pci_dev *pdev = adapter->pdev;
1700 struct atl1c_buffer *buffer_info, *next_info;
1701 struct sk_buff *skb;
1702 void *vir_addr = NULL;
1703 u16 num_alloc = 0;
1704 u16 rfd_next_to_use, next_next;
1705 struct atl1c_rx_free_desc *rfd_desc;
1706 dma_addr_t mapping;
1707
1708 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1709 if (++next_next == rfd_ring->count)
1710 next_next = 0;
1711 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1712 next_info = &rfd_ring->buffer_info[next_next];
1713
1714 while (next_info->flags & ATL1C_BUFFER_FREE) {
1715 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1716
1717 skb = atl1c_alloc_skb(adapter);
1718 if (unlikely(!skb)) {
1719 if (netif_msg_rx_err(adapter))
1720 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1721 break;
1722 }
1723
1724 /*
1725 * Make buffer alignment 2 beyond a 16 byte boundary
1726 * this will result in a 16 byte aligned IP header after
1727 * the 14 byte MAC header is removed
1728 */
1729 vir_addr = skb->data;
1730 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1731 buffer_info->skb = skb;
1732 buffer_info->length = adapter->rx_buffer_len;
1733 mapping = pci_map_single(pdev, vir_addr,
1734 buffer_info->length,
1735 PCI_DMA_FROMDEVICE);
1736 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1737 dev_kfree_skb(skb);
1738 buffer_info->skb = NULL;
1739 buffer_info->length = 0;
1740 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1741 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1742 break;
1743 }
1744 buffer_info->dma = mapping;
1745 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1746 ATL1C_PCIMAP_FROMDEVICE);
1747 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1748 rfd_next_to_use = next_next;
1749 if (++next_next == rfd_ring->count)
1750 next_next = 0;
1751 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1752 next_info = &rfd_ring->buffer_info[next_next];
1753 num_alloc++;
1754 }
1755
1756 if (num_alloc) {
1757 /* TODO: update mailbox here */
1758 wmb();
1759 rfd_ring->next_to_use = rfd_next_to_use;
1760 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1761 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1762 }
1763
1764 return num_alloc;
1765 }
1766
1767 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1768 struct atl1c_recv_ret_status *rrs, u16 num)
1769 {
1770 u16 i;
1771 /* the relationship between rrd and rfd is one map one */
1772 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1773 rrd_ring->next_to_clean)) {
1774 rrs->word3 &= ~RRS_RXD_UPDATED;
1775 if (++rrd_ring->next_to_clean == rrd_ring->count)
1776 rrd_ring->next_to_clean = 0;
1777 }
1778 }
1779
1780 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1781 struct atl1c_recv_ret_status *rrs, u16 num)
1782 {
1783 u16 i;
1784 u16 rfd_index;
1785 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1786
1787 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1788 RRS_RX_RFD_INDEX_MASK;
1789 for (i = 0; i < num; i++) {
1790 buffer_info[rfd_index].skb = NULL;
1791 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1792 ATL1C_BUFFER_FREE);
1793 if (++rfd_index == rfd_ring->count)
1794 rfd_index = 0;
1795 }
1796 rfd_ring->next_to_clean = rfd_index;
1797 }
1798
1799 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1800 int *work_done, int work_to_do)
1801 {
1802 u16 rfd_num, rfd_index;
1803 u16 count = 0;
1804 u16 length;
1805 struct pci_dev *pdev = adapter->pdev;
1806 struct net_device *netdev = adapter->netdev;
1807 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1808 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1809 struct sk_buff *skb;
1810 struct atl1c_recv_ret_status *rrs;
1811 struct atl1c_buffer *buffer_info;
1812
1813 while (1) {
1814 if (*work_done >= work_to_do)
1815 break;
1816 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1817 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1818 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1819 RRS_RX_RFD_CNT_MASK;
1820 if (unlikely(rfd_num != 1))
1821 /* TODO support mul rfd*/
1822 if (netif_msg_rx_err(adapter))
1823 dev_warn(&pdev->dev,
1824 "Multi rfd not support yet!\n");
1825 goto rrs_checked;
1826 } else {
1827 break;
1828 }
1829 rrs_checked:
1830 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1831 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1832 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1833 if (netif_msg_rx_err(adapter))
1834 dev_warn(&pdev->dev,
1835 "wrong packet! rrs word3 is %x\n",
1836 rrs->word3);
1837 continue;
1838 }
1839
1840 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1841 RRS_PKT_SIZE_MASK);
1842 /* Good Receive */
1843 if (likely(rfd_num == 1)) {
1844 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1845 RRS_RX_RFD_INDEX_MASK;
1846 buffer_info = &rfd_ring->buffer_info[rfd_index];
1847 pci_unmap_single(pdev, buffer_info->dma,
1848 buffer_info->length, PCI_DMA_FROMDEVICE);
1849 skb = buffer_info->skb;
1850 } else {
1851 /* TODO */
1852 if (netif_msg_rx_err(adapter))
1853 dev_warn(&pdev->dev,
1854 "Multi rfd not support yet!\n");
1855 break;
1856 }
1857 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1858 skb_put(skb, length - ETH_FCS_LEN);
1859 skb->protocol = eth_type_trans(skb, netdev);
1860 atl1c_rx_checksum(adapter, skb, rrs);
1861 if (rrs->word3 & RRS_VLAN_INS) {
1862 u16 vlan;
1863
1864 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1865 vlan = le16_to_cpu(vlan);
1866 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1867 }
1868 netif_receive_skb(skb);
1869
1870 (*work_done)++;
1871 count++;
1872 }
1873 if (count)
1874 atl1c_alloc_rx_buffer(adapter);
1875 }
1876
1877 /**
1878 * atl1c_clean - NAPI Rx polling callback
1879 */
1880 static int atl1c_clean(struct napi_struct *napi, int budget)
1881 {
1882 struct atl1c_adapter *adapter =
1883 container_of(napi, struct atl1c_adapter, napi);
1884 int work_done = 0;
1885
1886 /* Keep link state information with original netdev */
1887 if (!netif_carrier_ok(adapter->netdev))
1888 goto quit_polling;
1889 /* just enable one RXQ */
1890 atl1c_clean_rx_irq(adapter, &work_done, budget);
1891
1892 if (work_done < budget) {
1893 quit_polling:
1894 napi_complete(napi);
1895 adapter->hw.intr_mask |= ISR_RX_PKT;
1896 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1897 }
1898 return work_done;
1899 }
1900
1901 #ifdef CONFIG_NET_POLL_CONTROLLER
1902
1903 /*
1904 * Polling 'interrupt' - used by things like netconsole to send skbs
1905 * without having to re-enable interrupts. It's not called while
1906 * the interrupt routine is executing.
1907 */
1908 static void atl1c_netpoll(struct net_device *netdev)
1909 {
1910 struct atl1c_adapter *adapter = netdev_priv(netdev);
1911
1912 disable_irq(adapter->pdev->irq);
1913 atl1c_intr(adapter->pdev->irq, netdev);
1914 enable_irq(adapter->pdev->irq);
1915 }
1916 #endif
1917
1918 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1919 {
1920 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1921 u16 next_to_use = 0;
1922 u16 next_to_clean = 0;
1923
1924 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1925 next_to_use = tpd_ring->next_to_use;
1926
1927 return (u16)(next_to_clean > next_to_use) ?
1928 (next_to_clean - next_to_use - 1) :
1929 (tpd_ring->count + next_to_clean - next_to_use - 1);
1930 }
1931
1932 /*
1933 * get next usable tpd
1934 * Note: should call atl1c_tdp_avail to make sure
1935 * there is enough tpd to use
1936 */
1937 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1938 enum atl1c_trans_queue type)
1939 {
1940 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1941 struct atl1c_tpd_desc *tpd_desc;
1942 u16 next_to_use = 0;
1943
1944 next_to_use = tpd_ring->next_to_use;
1945 if (++tpd_ring->next_to_use == tpd_ring->count)
1946 tpd_ring->next_to_use = 0;
1947 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1948 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1949 return tpd_desc;
1950 }
1951
1952 static struct atl1c_buffer *
1953 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1954 {
1955 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1956
1957 return &tpd_ring->buffer_info[tpd -
1958 (struct atl1c_tpd_desc *)tpd_ring->desc];
1959 }
1960
1961 /* Calculate the transmit packet descript needed*/
1962 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1963 {
1964 u16 tpd_req;
1965 u16 proto_hdr_len = 0;
1966
1967 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1968
1969 if (skb_is_gso(skb)) {
1970 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1971 if (proto_hdr_len < skb_headlen(skb))
1972 tpd_req++;
1973 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1974 tpd_req++;
1975 }
1976 return tpd_req;
1977 }
1978
1979 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1980 struct sk_buff *skb,
1981 struct atl1c_tpd_desc **tpd,
1982 enum atl1c_trans_queue type)
1983 {
1984 struct pci_dev *pdev = adapter->pdev;
1985 unsigned short offload_type;
1986 u8 hdr_len;
1987 u32 real_len;
1988
1989 if (skb_is_gso(skb)) {
1990 int err;
1991
1992 err = skb_cow_head(skb, 0);
1993 if (err < 0)
1994 return err;
1995
1996 offload_type = skb_shinfo(skb)->gso_type;
1997
1998 if (offload_type & SKB_GSO_TCPV4) {
1999 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2000 + ntohs(ip_hdr(skb)->tot_len));
2001
2002 if (real_len < skb->len)
2003 pskb_trim(skb, real_len);
2004
2005 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2006 if (unlikely(skb->len == hdr_len)) {
2007 /* only xsum need */
2008 if (netif_msg_tx_queued(adapter))
2009 dev_warn(&pdev->dev,
2010 "IPV4 tso with zero data??\n");
2011 goto check_sum;
2012 } else {
2013 ip_hdr(skb)->check = 0;
2014 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2015 ip_hdr(skb)->saddr,
2016 ip_hdr(skb)->daddr,
2017 0, IPPROTO_TCP, 0);
2018 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2019 }
2020 }
2021
2022 if (offload_type & SKB_GSO_TCPV6) {
2023 struct atl1c_tpd_ext_desc *etpd =
2024 *(struct atl1c_tpd_ext_desc **)(tpd);
2025
2026 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2027 *tpd = atl1c_get_tpd(adapter, type);
2028 ipv6_hdr(skb)->payload_len = 0;
2029 /* check payload == 0 byte ? */
2030 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2031 if (unlikely(skb->len == hdr_len)) {
2032 /* only xsum need */
2033 if (netif_msg_tx_queued(adapter))
2034 dev_warn(&pdev->dev,
2035 "IPV6 tso with zero data??\n");
2036 goto check_sum;
2037 } else
2038 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2039 &ipv6_hdr(skb)->saddr,
2040 &ipv6_hdr(skb)->daddr,
2041 0, IPPROTO_TCP, 0);
2042 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2043 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2044 etpd->pkt_len = cpu_to_le32(skb->len);
2045 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2046 }
2047
2048 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2049 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2050 TPD_TCPHDR_OFFSET_SHIFT;
2051 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2052 TPD_MSS_SHIFT;
2053 return 0;
2054 }
2055
2056 check_sum:
2057 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2058 u8 css, cso;
2059 cso = skb_checksum_start_offset(skb);
2060
2061 if (unlikely(cso & 0x1)) {
2062 if (netif_msg_tx_err(adapter))
2063 dev_err(&adapter->pdev->dev,
2064 "payload offset should not an event number\n");
2065 return -1;
2066 } else {
2067 css = cso + skb->csum_offset;
2068
2069 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2070 TPD_PLOADOFFSET_SHIFT;
2071 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2072 TPD_CCSUM_OFFSET_SHIFT;
2073 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2074 }
2075 }
2076 return 0;
2077 }
2078
2079 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2080 struct atl1c_tpd_desc *first_tpd,
2081 enum atl1c_trans_queue type)
2082 {
2083 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2084 struct atl1c_buffer *buffer_info;
2085 struct atl1c_tpd_desc *tpd;
2086 u16 first_index, index;
2087
2088 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2089 index = first_index;
2090 while (index != tpd_ring->next_to_use) {
2091 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2092 buffer_info = &tpd_ring->buffer_info[index];
2093 atl1c_clean_buffer(adpt->pdev, buffer_info);
2094 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2095 if (++index == tpd_ring->count)
2096 index = 0;
2097 }
2098 tpd_ring->next_to_use = first_index;
2099 }
2100
2101 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2102 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2103 enum atl1c_trans_queue type)
2104 {
2105 struct atl1c_tpd_desc *use_tpd = NULL;
2106 struct atl1c_buffer *buffer_info = NULL;
2107 u16 buf_len = skb_headlen(skb);
2108 u16 map_len = 0;
2109 u16 mapped_len = 0;
2110 u16 hdr_len = 0;
2111 u16 nr_frags;
2112 u16 f;
2113 int tso;
2114
2115 nr_frags = skb_shinfo(skb)->nr_frags;
2116 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2117 if (tso) {
2118 /* TSO */
2119 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2120 use_tpd = tpd;
2121
2122 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2123 buffer_info->length = map_len;
2124 buffer_info->dma = pci_map_single(adapter->pdev,
2125 skb->data, hdr_len, PCI_DMA_TODEVICE);
2126 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2127 buffer_info->dma)))
2128 goto err_dma;
2129 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2130 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2131 ATL1C_PCIMAP_TODEVICE);
2132 mapped_len += map_len;
2133 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2134 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2135 }
2136
2137 if (mapped_len < buf_len) {
2138 /* mapped_len == 0, means we should use the first tpd,
2139 which is given by caller */
2140 if (mapped_len == 0)
2141 use_tpd = tpd;
2142 else {
2143 use_tpd = atl1c_get_tpd(adapter, type);
2144 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2145 }
2146 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2147 buffer_info->length = buf_len - mapped_len;
2148 buffer_info->dma =
2149 pci_map_single(adapter->pdev, skb->data + mapped_len,
2150 buffer_info->length, PCI_DMA_TODEVICE);
2151 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2152 buffer_info->dma)))
2153 goto err_dma;
2154
2155 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2156 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2157 ATL1C_PCIMAP_TODEVICE);
2158 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2159 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2160 }
2161
2162 for (f = 0; f < nr_frags; f++) {
2163 struct skb_frag_struct *frag;
2164
2165 frag = &skb_shinfo(skb)->frags[f];
2166
2167 use_tpd = atl1c_get_tpd(adapter, type);
2168 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2169
2170 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2171 buffer_info->length = skb_frag_size(frag);
2172 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2173 frag, 0,
2174 buffer_info->length,
2175 DMA_TO_DEVICE);
2176 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2177 goto err_dma;
2178
2179 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2180 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2181 ATL1C_PCIMAP_TODEVICE);
2182 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2183 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2184 }
2185
2186 /* The last tpd */
2187 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2188 /* The last buffer info contain the skb address,
2189 so it will be free after unmap */
2190 buffer_info->skb = skb;
2191
2192 return 0;
2193
2194 err_dma:
2195 buffer_info->dma = 0;
2196 buffer_info->length = 0;
2197 return -1;
2198 }
2199
2200 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2201 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2202 {
2203 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2204 u16 reg;
2205
2206 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2207 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2208 }
2209
2210 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2211 struct net_device *netdev)
2212 {
2213 struct atl1c_adapter *adapter = netdev_priv(netdev);
2214 unsigned long flags;
2215 u16 tpd_req = 1;
2216 struct atl1c_tpd_desc *tpd;
2217 enum atl1c_trans_queue type = atl1c_trans_normal;
2218
2219 if (test_bit(__AT_DOWN, &adapter->flags)) {
2220 dev_kfree_skb_any(skb);
2221 return NETDEV_TX_OK;
2222 }
2223
2224 tpd_req = atl1c_cal_tpd_req(skb);
2225 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2226 if (netif_msg_pktdata(adapter))
2227 dev_info(&adapter->pdev->dev, "tx locked\n");
2228 return NETDEV_TX_LOCKED;
2229 }
2230
2231 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2232 /* no enough descriptor, just stop queue */
2233 netif_stop_queue(netdev);
2234 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2235 return NETDEV_TX_BUSY;
2236 }
2237
2238 tpd = atl1c_get_tpd(adapter, type);
2239
2240 /* do TSO and check sum */
2241 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2242 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2243 dev_kfree_skb_any(skb);
2244 return NETDEV_TX_OK;
2245 }
2246
2247 if (unlikely(skb_vlan_tag_present(skb))) {
2248 u16 vlan = skb_vlan_tag_get(skb);
2249 __le16 tag;
2250
2251 vlan = cpu_to_le16(vlan);
2252 AT_VLAN_TO_TAG(vlan, tag);
2253 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2254 tpd->vlan_tag = tag;
2255 }
2256
2257 if (skb_network_offset(skb) != ETH_HLEN)
2258 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2259
2260 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2261 netif_info(adapter, tx_done, adapter->netdev,
2262 "tx-skb droppted due to dma error\n");
2263 /* roll back tpd/buffer */
2264 atl1c_tx_rollback(adapter, tpd, type);
2265 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2266 dev_kfree_skb_any(skb);
2267 } else {
2268 netdev_sent_queue(adapter->netdev, skb->len);
2269 atl1c_tx_queue(adapter, skb, tpd, type);
2270 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2271 }
2272
2273 return NETDEV_TX_OK;
2274 }
2275
2276 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2277 {
2278 struct net_device *netdev = adapter->netdev;
2279
2280 free_irq(adapter->pdev->irq, netdev);
2281
2282 if (adapter->have_msi)
2283 pci_disable_msi(adapter->pdev);
2284 }
2285
2286 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2287 {
2288 struct pci_dev *pdev = adapter->pdev;
2289 struct net_device *netdev = adapter->netdev;
2290 int flags = 0;
2291 int err = 0;
2292
2293 adapter->have_msi = true;
2294 err = pci_enable_msi(adapter->pdev);
2295 if (err) {
2296 if (netif_msg_ifup(adapter))
2297 dev_err(&pdev->dev,
2298 "Unable to allocate MSI interrupt Error: %d\n",
2299 err);
2300 adapter->have_msi = false;
2301 }
2302
2303 if (!adapter->have_msi)
2304 flags |= IRQF_SHARED;
2305 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2306 netdev->name, netdev);
2307 if (err) {
2308 if (netif_msg_ifup(adapter))
2309 dev_err(&pdev->dev,
2310 "Unable to allocate interrupt Error: %d\n",
2311 err);
2312 if (adapter->have_msi)
2313 pci_disable_msi(adapter->pdev);
2314 return err;
2315 }
2316 if (netif_msg_ifup(adapter))
2317 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2318 return err;
2319 }
2320
2321
2322 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2323 {
2324 /* release tx-pending skbs and reset tx/rx ring index */
2325 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2326 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2327 atl1c_clean_rx_ring(adapter);
2328 }
2329
2330 static int atl1c_up(struct atl1c_adapter *adapter)
2331 {
2332 struct net_device *netdev = adapter->netdev;
2333 int err;
2334
2335 netif_carrier_off(netdev);
2336
2337 err = atl1c_configure(adapter);
2338 if (unlikely(err))
2339 goto err_up;
2340
2341 err = atl1c_request_irq(adapter);
2342 if (unlikely(err))
2343 goto err_up;
2344
2345 atl1c_check_link_status(adapter);
2346 clear_bit(__AT_DOWN, &adapter->flags);
2347 napi_enable(&adapter->napi);
2348 atl1c_irq_enable(adapter);
2349 netif_start_queue(netdev);
2350 return err;
2351
2352 err_up:
2353 atl1c_clean_rx_ring(adapter);
2354 return err;
2355 }
2356
2357 static void atl1c_down(struct atl1c_adapter *adapter)
2358 {
2359 struct net_device *netdev = adapter->netdev;
2360
2361 atl1c_del_timer(adapter);
2362 adapter->work_event = 0; /* clear all event */
2363 /* signal that we're down so the interrupt handler does not
2364 * reschedule our watchdog timer */
2365 set_bit(__AT_DOWN, &adapter->flags);
2366 netif_carrier_off(netdev);
2367 napi_disable(&adapter->napi);
2368 atl1c_irq_disable(adapter);
2369 atl1c_free_irq(adapter);
2370 /* disable ASPM if device inactive */
2371 atl1c_disable_l0s_l1(&adapter->hw);
2372 /* reset MAC to disable all RX/TX */
2373 atl1c_reset_mac(&adapter->hw);
2374 msleep(1);
2375
2376 adapter->link_speed = SPEED_0;
2377 adapter->link_duplex = -1;
2378 atl1c_reset_dma_ring(adapter);
2379 }
2380
2381 /**
2382 * atl1c_open - Called when a network interface is made active
2383 * @netdev: network interface device structure
2384 *
2385 * Returns 0 on success, negative value on failure
2386 *
2387 * The open entry point is called when a network interface is made
2388 * active by the system (IFF_UP). At this point all resources needed
2389 * for transmit and receive operations are allocated, the interrupt
2390 * handler is registered with the OS, the watchdog timer is started,
2391 * and the stack is notified that the interface is ready.
2392 */
2393 static int atl1c_open(struct net_device *netdev)
2394 {
2395 struct atl1c_adapter *adapter = netdev_priv(netdev);
2396 int err;
2397
2398 /* disallow open during test */
2399 if (test_bit(__AT_TESTING, &adapter->flags))
2400 return -EBUSY;
2401
2402 /* allocate rx/tx dma buffer & descriptors */
2403 err = atl1c_setup_ring_resources(adapter);
2404 if (unlikely(err))
2405 return err;
2406
2407 err = atl1c_up(adapter);
2408 if (unlikely(err))
2409 goto err_up;
2410
2411 return 0;
2412
2413 err_up:
2414 atl1c_free_irq(adapter);
2415 atl1c_free_ring_resources(adapter);
2416 atl1c_reset_mac(&adapter->hw);
2417 return err;
2418 }
2419
2420 /**
2421 * atl1c_close - Disables a network interface
2422 * @netdev: network interface device structure
2423 *
2424 * Returns 0, this is not allowed to fail
2425 *
2426 * The close entry point is called when an interface is de-activated
2427 * by the OS. The hardware is still under the drivers control, but
2428 * needs to be disabled. A global MAC reset is issued to stop the
2429 * hardware, and all transmit and receive resources are freed.
2430 */
2431 static int atl1c_close(struct net_device *netdev)
2432 {
2433 struct atl1c_adapter *adapter = netdev_priv(netdev);
2434
2435 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2436 set_bit(__AT_DOWN, &adapter->flags);
2437 cancel_work_sync(&adapter->common_task);
2438 atl1c_down(adapter);
2439 atl1c_free_ring_resources(adapter);
2440 return 0;
2441 }
2442
2443 static int atl1c_suspend(struct device *dev)
2444 {
2445 struct pci_dev *pdev = to_pci_dev(dev);
2446 struct net_device *netdev = pci_get_drvdata(pdev);
2447 struct atl1c_adapter *adapter = netdev_priv(netdev);
2448 struct atl1c_hw *hw = &adapter->hw;
2449 u32 wufc = adapter->wol;
2450
2451 atl1c_disable_l0s_l1(hw);
2452 if (netif_running(netdev)) {
2453 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2454 atl1c_down(adapter);
2455 }
2456 netif_device_detach(netdev);
2457
2458 if (wufc)
2459 if (atl1c_phy_to_ps_link(hw) != 0)
2460 dev_dbg(&pdev->dev, "phy power saving failed");
2461
2462 atl1c_power_saving(hw, wufc);
2463
2464 return 0;
2465 }
2466
2467 #ifdef CONFIG_PM_SLEEP
2468 static int atl1c_resume(struct device *dev)
2469 {
2470 struct pci_dev *pdev = to_pci_dev(dev);
2471 struct net_device *netdev = pci_get_drvdata(pdev);
2472 struct atl1c_adapter *adapter = netdev_priv(netdev);
2473
2474 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2475 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2476
2477 atl1c_phy_reset(&adapter->hw);
2478 atl1c_reset_mac(&adapter->hw);
2479 atl1c_phy_init(&adapter->hw);
2480
2481 #if 0
2482 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2483 pm_data &= ~PM_CTRLSTAT_PME_EN;
2484 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2485 #endif
2486
2487 netif_device_attach(netdev);
2488 if (netif_running(netdev))
2489 atl1c_up(adapter);
2490
2491 return 0;
2492 }
2493 #endif
2494
2495 static void atl1c_shutdown(struct pci_dev *pdev)
2496 {
2497 struct net_device *netdev = pci_get_drvdata(pdev);
2498 struct atl1c_adapter *adapter = netdev_priv(netdev);
2499
2500 atl1c_suspend(&pdev->dev);
2501 pci_wake_from_d3(pdev, adapter->wol);
2502 pci_set_power_state(pdev, PCI_D3hot);
2503 }
2504
2505 static const struct net_device_ops atl1c_netdev_ops = {
2506 .ndo_open = atl1c_open,
2507 .ndo_stop = atl1c_close,
2508 .ndo_validate_addr = eth_validate_addr,
2509 .ndo_start_xmit = atl1c_xmit_frame,
2510 .ndo_set_mac_address = atl1c_set_mac_addr,
2511 .ndo_set_rx_mode = atl1c_set_multi,
2512 .ndo_change_mtu = atl1c_change_mtu,
2513 .ndo_fix_features = atl1c_fix_features,
2514 .ndo_set_features = atl1c_set_features,
2515 .ndo_do_ioctl = atl1c_ioctl,
2516 .ndo_tx_timeout = atl1c_tx_timeout,
2517 .ndo_get_stats = atl1c_get_stats,
2518 #ifdef CONFIG_NET_POLL_CONTROLLER
2519 .ndo_poll_controller = atl1c_netpoll,
2520 #endif
2521 };
2522
2523 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2524 {
2525 SET_NETDEV_DEV(netdev, &pdev->dev);
2526 pci_set_drvdata(pdev, netdev);
2527
2528 netdev->netdev_ops = &atl1c_netdev_ops;
2529 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2530 atl1c_set_ethtool_ops(netdev);
2531
2532 /* TODO: add when ready */
2533 netdev->hw_features = NETIF_F_SG |
2534 NETIF_F_HW_CSUM |
2535 NETIF_F_HW_VLAN_CTAG_RX |
2536 NETIF_F_TSO |
2537 NETIF_F_TSO6;
2538 netdev->features = netdev->hw_features |
2539 NETIF_F_HW_VLAN_CTAG_TX;
2540 return 0;
2541 }
2542
2543 /**
2544 * atl1c_probe - Device Initialization Routine
2545 * @pdev: PCI device information struct
2546 * @ent: entry in atl1c_pci_tbl
2547 *
2548 * Returns 0 on success, negative on failure
2549 *
2550 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2551 * The OS initialization, configuring of the adapter private structure,
2552 * and a hardware reset occur.
2553 */
2554 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2555 {
2556 struct net_device *netdev;
2557 struct atl1c_adapter *adapter;
2558 static int cards_found;
2559
2560 int err = 0;
2561
2562 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2563 err = pci_enable_device_mem(pdev);
2564 if (err) {
2565 dev_err(&pdev->dev, "cannot enable PCI device\n");
2566 return err;
2567 }
2568
2569 /*
2570 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2571 * shared register for the high 32 bits, so only a single, aligned,
2572 * 4 GB physical address range can be used at a time.
2573 *
2574 * Supporting 64-bit DMA on this hardware is more trouble than it's
2575 * worth. It is far easier to limit to 32-bit DMA than update
2576 * various kernel subsystems to support the mechanics required by a
2577 * fixed-high-32-bit system.
2578 */
2579 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2580 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2581 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2582 goto err_dma;
2583 }
2584
2585 err = pci_request_regions(pdev, atl1c_driver_name);
2586 if (err) {
2587 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2588 goto err_pci_reg;
2589 }
2590
2591 pci_set_master(pdev);
2592
2593 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2594 if (netdev == NULL) {
2595 err = -ENOMEM;
2596 goto err_alloc_etherdev;
2597 }
2598
2599 err = atl1c_init_netdev(netdev, pdev);
2600 if (err) {
2601 dev_err(&pdev->dev, "init netdevice failed\n");
2602 goto err_init_netdev;
2603 }
2604 adapter = netdev_priv(netdev);
2605 adapter->bd_number = cards_found;
2606 adapter->netdev = netdev;
2607 adapter->pdev = pdev;
2608 adapter->hw.adapter = adapter;
2609 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2610 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2611 if (!adapter->hw.hw_addr) {
2612 err = -EIO;
2613 dev_err(&pdev->dev, "cannot map device registers\n");
2614 goto err_ioremap;
2615 }
2616
2617 /* init mii data */
2618 adapter->mii.dev = netdev;
2619 adapter->mii.mdio_read = atl1c_mdio_read;
2620 adapter->mii.mdio_write = atl1c_mdio_write;
2621 adapter->mii.phy_id_mask = 0x1f;
2622 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2623 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2624 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2625 (unsigned long)adapter);
2626 /* setup the private structure */
2627 err = atl1c_sw_init(adapter);
2628 if (err) {
2629 dev_err(&pdev->dev, "net device private data init failed\n");
2630 goto err_sw_init;
2631 }
2632 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2633
2634 /* Init GPHY as early as possible due to power saving issue */
2635 atl1c_phy_reset(&adapter->hw);
2636
2637 err = atl1c_reset_mac(&adapter->hw);
2638 if (err) {
2639 err = -EIO;
2640 goto err_reset;
2641 }
2642
2643 /* reset the controller to
2644 * put the device in a known good starting state */
2645 err = atl1c_phy_init(&adapter->hw);
2646 if (err) {
2647 err = -EIO;
2648 goto err_reset;
2649 }
2650 if (atl1c_read_mac_addr(&adapter->hw)) {
2651 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2652 netdev->addr_assign_type = NET_ADDR_RANDOM;
2653 }
2654 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2655 if (netif_msg_probe(adapter))
2656 dev_dbg(&pdev->dev, "mac address : %pM\n",
2657 adapter->hw.mac_addr);
2658
2659 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2660 INIT_WORK(&adapter->common_task, atl1c_common_task);
2661 adapter->work_event = 0;
2662 err = register_netdev(netdev);
2663 if (err) {
2664 dev_err(&pdev->dev, "register netdevice failed\n");
2665 goto err_register;
2666 }
2667
2668 if (netif_msg_probe(adapter))
2669 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2670 cards_found++;
2671 return 0;
2672
2673 err_reset:
2674 err_register:
2675 err_sw_init:
2676 iounmap(adapter->hw.hw_addr);
2677 err_init_netdev:
2678 err_ioremap:
2679 free_netdev(netdev);
2680 err_alloc_etherdev:
2681 pci_release_regions(pdev);
2682 err_pci_reg:
2683 err_dma:
2684 pci_disable_device(pdev);
2685 return err;
2686 }
2687
2688 /**
2689 * atl1c_remove - Device Removal Routine
2690 * @pdev: PCI device information struct
2691 *
2692 * atl1c_remove is called by the PCI subsystem to alert the driver
2693 * that it should release a PCI device. The could be caused by a
2694 * Hot-Plug event, or because the driver is going to be removed from
2695 * memory.
2696 */
2697 static void atl1c_remove(struct pci_dev *pdev)
2698 {
2699 struct net_device *netdev = pci_get_drvdata(pdev);
2700 struct atl1c_adapter *adapter = netdev_priv(netdev);
2701
2702 unregister_netdev(netdev);
2703 /* restore permanent address */
2704 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2705 atl1c_phy_disable(&adapter->hw);
2706
2707 iounmap(adapter->hw.hw_addr);
2708
2709 pci_release_regions(pdev);
2710 pci_disable_device(pdev);
2711 free_netdev(netdev);
2712 }
2713
2714 /**
2715 * atl1c_io_error_detected - called when PCI error is detected
2716 * @pdev: Pointer to PCI device
2717 * @state: The current pci connection state
2718 *
2719 * This function is called after a PCI bus error affecting
2720 * this device has been detected.
2721 */
2722 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2723 pci_channel_state_t state)
2724 {
2725 struct net_device *netdev = pci_get_drvdata(pdev);
2726 struct atl1c_adapter *adapter = netdev_priv(netdev);
2727
2728 netif_device_detach(netdev);
2729
2730 if (state == pci_channel_io_perm_failure)
2731 return PCI_ERS_RESULT_DISCONNECT;
2732
2733 if (netif_running(netdev))
2734 atl1c_down(adapter);
2735
2736 pci_disable_device(pdev);
2737
2738 /* Request a slot slot reset. */
2739 return PCI_ERS_RESULT_NEED_RESET;
2740 }
2741
2742 /**
2743 * atl1c_io_slot_reset - called after the pci bus has been reset.
2744 * @pdev: Pointer to PCI device
2745 *
2746 * Restart the card from scratch, as if from a cold-boot. Implementation
2747 * resembles the first-half of the e1000_resume routine.
2748 */
2749 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2750 {
2751 struct net_device *netdev = pci_get_drvdata(pdev);
2752 struct atl1c_adapter *adapter = netdev_priv(netdev);
2753
2754 if (pci_enable_device(pdev)) {
2755 if (netif_msg_hw(adapter))
2756 dev_err(&pdev->dev,
2757 "Cannot re-enable PCI device after reset\n");
2758 return PCI_ERS_RESULT_DISCONNECT;
2759 }
2760 pci_set_master(pdev);
2761
2762 pci_enable_wake(pdev, PCI_D3hot, 0);
2763 pci_enable_wake(pdev, PCI_D3cold, 0);
2764
2765 atl1c_reset_mac(&adapter->hw);
2766
2767 return PCI_ERS_RESULT_RECOVERED;
2768 }
2769
2770 /**
2771 * atl1c_io_resume - called when traffic can start flowing again.
2772 * @pdev: Pointer to PCI device
2773 *
2774 * This callback is called when the error recovery driver tells us that
2775 * its OK to resume normal operation. Implementation resembles the
2776 * second-half of the atl1c_resume routine.
2777 */
2778 static void atl1c_io_resume(struct pci_dev *pdev)
2779 {
2780 struct net_device *netdev = pci_get_drvdata(pdev);
2781 struct atl1c_adapter *adapter = netdev_priv(netdev);
2782
2783 if (netif_running(netdev)) {
2784 if (atl1c_up(adapter)) {
2785 if (netif_msg_hw(adapter))
2786 dev_err(&pdev->dev,
2787 "Cannot bring device back up after reset\n");
2788 return;
2789 }
2790 }
2791
2792 netif_device_attach(netdev);
2793 }
2794
2795 static const struct pci_error_handlers atl1c_err_handler = {
2796 .error_detected = atl1c_io_error_detected,
2797 .slot_reset = atl1c_io_slot_reset,
2798 .resume = atl1c_io_resume,
2799 };
2800
2801 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2802
2803 static struct pci_driver atl1c_driver = {
2804 .name = atl1c_driver_name,
2805 .id_table = atl1c_pci_tbl,
2806 .probe = atl1c_probe,
2807 .remove = atl1c_remove,
2808 .shutdown = atl1c_shutdown,
2809 .err_handler = &atl1c_err_handler,
2810 .driver.pm = &atl1c_pm_ops,
2811 };
2812
2813 module_pci_driver(atl1c_driver);
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