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atl1c: Fix misuse of netdev_alloc_skb in refilling rx ring
[linux-2.6/btrfs-unstable.git] / drivers / net / ethernet / atheros / atl1c / atl1c_main.c
bloba36a760ada28af64272a5132a60648c543963bed
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 DEFINE_PCI_DEVICE_TABLE(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("Qualcom 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 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
149 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
150 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
151 /* clear error status */
152 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
153 PCI_EXP_DEVSTA_NFED |
154 PCI_EXP_DEVSTA_FED |
155 PCI_EXP_DEVSTA_CED |
156 PCI_EXP_DEVSTA_URD);
157
158 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
159 data &= ~LTSSM_ID_EN_WRO;
160 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
161
162 atl1c_pcie_patch(hw);
163 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
164 atl1c_disable_l0s_l1(hw);
165
166 msleep(5);
167 }
168
169 /**
170 * atl1c_irq_enable - Enable default interrupt generation settings
171 * @adapter: board private structure
172 */
173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
174 {
175 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
176 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
177 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
178 AT_WRITE_FLUSH(&adapter->hw);
179 }
180 }
181
182 /**
183 * atl1c_irq_disable - Mask off interrupt generation on the NIC
184 * @adapter: board private structure
185 */
186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
187 {
188 atomic_inc(&adapter->irq_sem);
189 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
190 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
191 AT_WRITE_FLUSH(&adapter->hw);
192 synchronize_irq(adapter->pdev->irq);
193 }
194
195 /**
196 * atl1c_irq_reset - reset interrupt confiure on the NIC
197 * @adapter: board private structure
198 */
199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
200 {
201 atomic_set(&adapter->irq_sem, 1);
202 atl1c_irq_enable(adapter);
203 }
204
205 /*
206 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
207 * of the idle status register until the device is actually idle
208 */
209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
210 {
211 int timeout;
212 u32 data;
213
214 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
215 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
216 if ((data & modu_ctrl) == 0)
217 return 0;
218 msleep(1);
219 }
220 return data;
221 }
222
223 /**
224 * atl1c_phy_config - Timer Call-back
225 * @data: pointer to netdev cast into an unsigned long
226 */
227 static void atl1c_phy_config(unsigned long data)
228 {
229 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
230 struct atl1c_hw *hw = &adapter->hw;
231 unsigned long flags;
232
233 spin_lock_irqsave(&adapter->mdio_lock, flags);
234 atl1c_restart_autoneg(hw);
235 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
236 }
237
238 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
239 {
240 WARN_ON(in_interrupt());
241 atl1c_down(adapter);
242 atl1c_up(adapter);
243 clear_bit(__AT_RESETTING, &adapter->flags);
244 }
245
246 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
247 {
248 struct atl1c_hw *hw = &adapter->hw;
249 struct net_device *netdev = adapter->netdev;
250 struct pci_dev *pdev = adapter->pdev;
251 int err;
252 unsigned long flags;
253 u16 speed, duplex, phy_data;
254
255 spin_lock_irqsave(&adapter->mdio_lock, flags);
256 /* MII_BMSR must read twise */
257 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
258 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
259 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
260
261 if ((phy_data & BMSR_LSTATUS) == 0) {
262 /* link down */
263 netif_carrier_off(netdev);
264 hw->hibernate = true;
265 if (atl1c_reset_mac(hw) != 0)
266 if (netif_msg_hw(adapter))
267 dev_warn(&pdev->dev, "reset mac failed\n");
268 atl1c_set_aspm(hw, SPEED_0);
269 atl1c_post_phy_linkchg(hw, SPEED_0);
270 atl1c_reset_dma_ring(adapter);
271 atl1c_configure(adapter);
272 } else {
273 /* Link Up */
274 hw->hibernate = false;
275 spin_lock_irqsave(&adapter->mdio_lock, flags);
276 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
277 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
278 if (unlikely(err))
279 return;
280 /* link result is our setting */
281 if (adapter->link_speed != speed ||
282 adapter->link_duplex != duplex) {
283 adapter->link_speed = speed;
284 adapter->link_duplex = duplex;
285 atl1c_set_aspm(hw, speed);
286 atl1c_post_phy_linkchg(hw, speed);
287 atl1c_start_mac(adapter);
288 if (netif_msg_link(adapter))
289 dev_info(&pdev->dev,
290 "%s: %s NIC Link is Up<%d Mbps %s>\n",
291 atl1c_driver_name, netdev->name,
292 adapter->link_speed,
293 adapter->link_duplex == FULL_DUPLEX ?
294 "Full Duplex" : "Half Duplex");
295 }
296 if (!netif_carrier_ok(netdev))
297 netif_carrier_on(netdev);
298 }
299 }
300
301 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
302 {
303 struct net_device *netdev = adapter->netdev;
304 struct pci_dev *pdev = adapter->pdev;
305 u16 phy_data;
306 u16 link_up;
307
308 spin_lock(&adapter->mdio_lock);
309 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
310 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
311 spin_unlock(&adapter->mdio_lock);
312 link_up = phy_data & BMSR_LSTATUS;
313 /* notify upper layer link down ASAP */
314 if (!link_up) {
315 if (netif_carrier_ok(netdev)) {
316 /* old link state: Up */
317 netif_carrier_off(netdev);
318 if (netif_msg_link(adapter))
319 dev_info(&pdev->dev,
320 "%s: %s NIC Link is Down\n",
321 atl1c_driver_name, netdev->name);
322 adapter->link_speed = SPEED_0;
323 }
324 }
325
326 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
327 schedule_work(&adapter->common_task);
328 }
329
330 static void atl1c_common_task(struct work_struct *work)
331 {
332 struct atl1c_adapter *adapter;
333 struct net_device *netdev;
334
335 adapter = container_of(work, struct atl1c_adapter, common_task);
336 netdev = adapter->netdev;
337
338 if (test_bit(__AT_DOWN, &adapter->flags))
339 return;
340
341 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
342 netif_device_detach(netdev);
343 atl1c_down(adapter);
344 atl1c_up(adapter);
345 netif_device_attach(netdev);
346 }
347
348 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
349 &adapter->work_event)) {
350 atl1c_irq_disable(adapter);
351 atl1c_check_link_status(adapter);
352 atl1c_irq_enable(adapter);
353 }
354 }
355
356
357 static void atl1c_del_timer(struct atl1c_adapter *adapter)
358 {
359 del_timer_sync(&adapter->phy_config_timer);
360 }
361
362
363 /**
364 * atl1c_tx_timeout - Respond to a Tx Hang
365 * @netdev: network interface device structure
366 */
367 static void atl1c_tx_timeout(struct net_device *netdev)
368 {
369 struct atl1c_adapter *adapter = netdev_priv(netdev);
370
371 /* Do the reset outside of interrupt context */
372 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
373 schedule_work(&adapter->common_task);
374 }
375
376 /**
377 * atl1c_set_multi - Multicast and Promiscuous mode set
378 * @netdev: network interface device structure
379 *
380 * The set_multi entry point is called whenever the multicast address
381 * list or the network interface flags are updated. This routine is
382 * responsible for configuring the hardware for proper multicast,
383 * promiscuous mode, and all-multi behavior.
384 */
385 static void atl1c_set_multi(struct net_device *netdev)
386 {
387 struct atl1c_adapter *adapter = netdev_priv(netdev);
388 struct atl1c_hw *hw = &adapter->hw;
389 struct netdev_hw_addr *ha;
390 u32 mac_ctrl_data;
391 u32 hash_value;
392
393 /* Check for Promiscuous and All Multicast modes */
394 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
395
396 if (netdev->flags & IFF_PROMISC) {
397 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
398 } else if (netdev->flags & IFF_ALLMULTI) {
399 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
400 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
401 } else {
402 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
403 }
404
405 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
406
407 /* clear the old settings from the multicast hash table */
408 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
409 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
410
411 /* comoute mc addresses' hash value ,and put it into hash table */
412 netdev_for_each_mc_addr(ha, netdev) {
413 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
414 atl1c_hash_set(hw, hash_value);
415 }
416 }
417
418 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
419 {
420 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
421 /* enable VLAN tag insert/strip */
422 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
423 } else {
424 /* disable VLAN tag insert/strip */
425 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
426 }
427 }
428
429 static void atl1c_vlan_mode(struct net_device *netdev,
430 netdev_features_t features)
431 {
432 struct atl1c_adapter *adapter = netdev_priv(netdev);
433 struct pci_dev *pdev = adapter->pdev;
434 u32 mac_ctrl_data = 0;
435
436 if (netif_msg_pktdata(adapter))
437 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
438
439 atl1c_irq_disable(adapter);
440 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
441 __atl1c_vlan_mode(features, &mac_ctrl_data);
442 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
443 atl1c_irq_enable(adapter);
444 }
445
446 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
447 {
448 struct pci_dev *pdev = adapter->pdev;
449
450 if (netif_msg_pktdata(adapter))
451 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
452 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
453 }
454
455 /**
456 * atl1c_set_mac - Change the Ethernet Address of the NIC
457 * @netdev: network interface device structure
458 * @p: pointer to an address structure
459 *
460 * Returns 0 on success, negative on failure
461 */
462 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
463 {
464 struct atl1c_adapter *adapter = netdev_priv(netdev);
465 struct sockaddr *addr = p;
466
467 if (!is_valid_ether_addr(addr->sa_data))
468 return -EADDRNOTAVAIL;
469
470 if (netif_running(netdev))
471 return -EBUSY;
472
473 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
474 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
475
476 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
477
478 return 0;
479 }
480
481 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
482 struct net_device *dev)
483 {
484 unsigned int head_size;
485 int mtu = dev->mtu;
486
487 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
488 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
489
490 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
491 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
492 adapter->rx_frag_size = roundup_pow_of_two(head_size);
493 }
494
495 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
496 netdev_features_t features)
497 {
498 /*
499 * Since there is no support for separate rx/tx vlan accel
500 * enable/disable make sure tx flag is always in same state as rx.
501 */
502 if (features & NETIF_F_HW_VLAN_CTAG_RX)
503 features |= NETIF_F_HW_VLAN_CTAG_TX;
504 else
505 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
506
507 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
508 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
509
510 return features;
511 }
512
513 static int atl1c_set_features(struct net_device *netdev,
514 netdev_features_t features)
515 {
516 netdev_features_t changed = netdev->features ^ features;
517
518 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
519 atl1c_vlan_mode(netdev, features);
520
521 return 0;
522 }
523
524 /**
525 * atl1c_change_mtu - Change the Maximum Transfer Unit
526 * @netdev: network interface device structure
527 * @new_mtu: new value for maximum frame size
528 *
529 * Returns 0 on success, negative on failure
530 */
531 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
532 {
533 struct atl1c_adapter *adapter = netdev_priv(netdev);
534 struct atl1c_hw *hw = &adapter->hw;
535 int old_mtu = netdev->mtu;
536 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
537
538 /* Fast Ethernet controller doesn't support jumbo packet */
539 if (((hw->nic_type == athr_l2c ||
540 hw->nic_type == athr_l2c_b ||
541 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
542 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
543 max_frame > MAX_JUMBO_FRAME_SIZE) {
544 if (netif_msg_link(adapter))
545 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
546 return -EINVAL;
547 }
548 /* set MTU */
549 if (old_mtu != new_mtu && netif_running(netdev)) {
550 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
551 msleep(1);
552 netdev->mtu = new_mtu;
553 adapter->hw.max_frame_size = new_mtu;
554 atl1c_set_rxbufsize(adapter, netdev);
555 atl1c_down(adapter);
556 netdev_update_features(netdev);
557 atl1c_up(adapter);
558 clear_bit(__AT_RESETTING, &adapter->flags);
559 }
560 return 0;
561 }
562
563 /*
564 * caller should hold mdio_lock
565 */
566 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
567 {
568 struct atl1c_adapter *adapter = netdev_priv(netdev);
569 u16 result;
570
571 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
572 return result;
573 }
574
575 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
576 int reg_num, int val)
577 {
578 struct atl1c_adapter *adapter = netdev_priv(netdev);
579
580 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
581 }
582
583 static int atl1c_mii_ioctl(struct net_device *netdev,
584 struct ifreq *ifr, int cmd)
585 {
586 struct atl1c_adapter *adapter = netdev_priv(netdev);
587 struct pci_dev *pdev = adapter->pdev;
588 struct mii_ioctl_data *data = if_mii(ifr);
589 unsigned long flags;
590 int retval = 0;
591
592 if (!netif_running(netdev))
593 return -EINVAL;
594
595 spin_lock_irqsave(&adapter->mdio_lock, flags);
596 switch (cmd) {
597 case SIOCGMIIPHY:
598 data->phy_id = 0;
599 break;
600
601 case SIOCGMIIREG:
602 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
603 &data->val_out)) {
604 retval = -EIO;
605 goto out;
606 }
607 break;
608
609 case SIOCSMIIREG:
610 if (data->reg_num & ~(0x1F)) {
611 retval = -EFAULT;
612 goto out;
613 }
614
615 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
616 data->reg_num, data->val_in);
617 if (atl1c_write_phy_reg(&adapter->hw,
618 data->reg_num, data->val_in)) {
619 retval = -EIO;
620 goto out;
621 }
622 break;
623
624 default:
625 retval = -EOPNOTSUPP;
626 break;
627 }
628 out:
629 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
630 return retval;
631 }
632
633 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
634 {
635 switch (cmd) {
636 case SIOCGMIIPHY:
637 case SIOCGMIIREG:
638 case SIOCSMIIREG:
639 return atl1c_mii_ioctl(netdev, ifr, cmd);
640 default:
641 return -EOPNOTSUPP;
642 }
643 }
644
645 /**
646 * atl1c_alloc_queues - Allocate memory for all rings
647 * @adapter: board private structure to initialize
648 *
649 */
650 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
651 {
652 return 0;
653 }
654
655 static void atl1c_set_mac_type(struct atl1c_hw *hw)
656 {
657 switch (hw->device_id) {
658 case PCI_DEVICE_ID_ATTANSIC_L2C:
659 hw->nic_type = athr_l2c;
660 break;
661 case PCI_DEVICE_ID_ATTANSIC_L1C:
662 hw->nic_type = athr_l1c;
663 break;
664 case PCI_DEVICE_ID_ATHEROS_L2C_B:
665 hw->nic_type = athr_l2c_b;
666 break;
667 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
668 hw->nic_type = athr_l2c_b2;
669 break;
670 case PCI_DEVICE_ID_ATHEROS_L1D:
671 hw->nic_type = athr_l1d;
672 break;
673 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
674 hw->nic_type = athr_l1d_2;
675 break;
676 default:
677 break;
678 }
679 }
680
681 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
682 {
683 u32 link_ctrl_data;
684
685 atl1c_set_mac_type(hw);
686 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
687
688 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
689 ATL1C_TXQ_MODE_ENHANCE;
690 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
691 ATL1C_ASPM_L1_SUPPORT;
692 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
693
694 if (hw->nic_type == athr_l1c ||
695 hw->nic_type == athr_l1d ||
696 hw->nic_type == athr_l1d_2)
697 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
698 return 0;
699 }
700
701 struct atl1c_platform_patch {
702 u16 pci_did;
703 u8 pci_revid;
704 u16 subsystem_vid;
705 u16 subsystem_did;
706 u32 patch_flag;
707 #define ATL1C_LINK_PATCH 0x1
708 };
709 static const struct atl1c_platform_patch plats[] = {
710 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
711 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
712 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
713 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
714 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
715 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
716 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
717 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
718 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
719 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
720 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
721 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
722 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
723 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
724 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
725 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
726 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
727 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
728 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
729 {0},
730 };
731
732 static void atl1c_patch_assign(struct atl1c_hw *hw)
733 {
734 struct pci_dev *pdev = hw->adapter->pdev;
735 u32 misc_ctrl;
736 int i = 0;
737
738 hw->msi_lnkpatch = false;
739
740 while (plats[i].pci_did != 0) {
741 if (plats[i].pci_did == hw->device_id &&
742 plats[i].pci_revid == hw->revision_id &&
743 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
744 plats[i].subsystem_did == hw->subsystem_id) {
745 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
746 hw->msi_lnkpatch = true;
747 }
748 i++;
749 }
750
751 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
752 hw->revision_id == L2CB_V21) {
753 /* config acess mode */
754 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
755 REG_PCIE_DEV_MISC_CTRL);
756 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
757 misc_ctrl &= ~0x100;
758 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
759 REG_PCIE_DEV_MISC_CTRL);
760 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
761 }
762 }
763 /**
764 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
765 * @adapter: board private structure to initialize
766 *
767 * atl1c_sw_init initializes the Adapter private data structure.
768 * Fields are initialized based on PCI device information and
769 * OS network device settings (MTU size).
770 */
771 static int atl1c_sw_init(struct atl1c_adapter *adapter)
772 {
773 struct atl1c_hw *hw = &adapter->hw;
774 struct pci_dev *pdev = adapter->pdev;
775 u32 revision;
776
777
778 adapter->wol = 0;
779 device_set_wakeup_enable(&pdev->dev, false);
780 adapter->link_speed = SPEED_0;
781 adapter->link_duplex = FULL_DUPLEX;
782 adapter->tpd_ring[0].count = 1024;
783 adapter->rfd_ring.count = 512;
784
785 hw->vendor_id = pdev->vendor;
786 hw->device_id = pdev->device;
787 hw->subsystem_vendor_id = pdev->subsystem_vendor;
788 hw->subsystem_id = pdev->subsystem_device;
789 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
790 hw->revision_id = revision & 0xFF;
791 /* before link up, we assume hibernate is true */
792 hw->hibernate = true;
793 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
794 if (atl1c_setup_mac_funcs(hw) != 0) {
795 dev_err(&pdev->dev, "set mac function pointers failed\n");
796 return -1;
797 }
798 atl1c_patch_assign(hw);
799
800 hw->intr_mask = IMR_NORMAL_MASK;
801 hw->phy_configured = false;
802 hw->preamble_len = 7;
803 hw->max_frame_size = adapter->netdev->mtu;
804 hw->autoneg_advertised = ADVERTISED_Autoneg;
805 hw->indirect_tab = 0xE4E4E4E4;
806 hw->base_cpu = 0;
807
808 hw->ict = 50000; /* 100ms */
809 hw->smb_timer = 200000; /* 400ms */
810 hw->rx_imt = 200;
811 hw->tx_imt = 1000;
812
813 hw->tpd_burst = 5;
814 hw->rfd_burst = 8;
815 hw->dma_order = atl1c_dma_ord_out;
816 hw->dmar_block = atl1c_dma_req_1024;
817
818 if (atl1c_alloc_queues(adapter)) {
819 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
820 return -ENOMEM;
821 }
822 /* TODO */
823 atl1c_set_rxbufsize(adapter, adapter->netdev);
824 atomic_set(&adapter->irq_sem, 1);
825 spin_lock_init(&adapter->mdio_lock);
826 spin_lock_init(&adapter->tx_lock);
827 set_bit(__AT_DOWN, &adapter->flags);
828
829 return 0;
830 }
831
832 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
833 struct atl1c_buffer *buffer_info, int in_irq)
834 {
835 u16 pci_driection;
836 if (buffer_info->flags & ATL1C_BUFFER_FREE)
837 return;
838 if (buffer_info->dma) {
839 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
840 pci_driection = PCI_DMA_FROMDEVICE;
841 else
842 pci_driection = PCI_DMA_TODEVICE;
843
844 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
845 pci_unmap_single(pdev, buffer_info->dma,
846 buffer_info->length, pci_driection);
847 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
848 pci_unmap_page(pdev, buffer_info->dma,
849 buffer_info->length, pci_driection);
850 }
851 if (buffer_info->skb) {
852 if (in_irq)
853 dev_kfree_skb_irq(buffer_info->skb);
854 else
855 dev_kfree_skb(buffer_info->skb);
856 }
857 buffer_info->dma = 0;
858 buffer_info->skb = NULL;
859 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
860 }
861 /**
862 * atl1c_clean_tx_ring - Free Tx-skb
863 * @adapter: board private structure
864 */
865 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
866 enum atl1c_trans_queue type)
867 {
868 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
869 struct atl1c_buffer *buffer_info;
870 struct pci_dev *pdev = adapter->pdev;
871 u16 index, ring_count;
872
873 ring_count = tpd_ring->count;
874 for (index = 0; index < ring_count; index++) {
875 buffer_info = &tpd_ring->buffer_info[index];
876 atl1c_clean_buffer(pdev, buffer_info, 0);
877 }
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, 0);
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_packets = hw_stats->rx_ok;
1502 net_stats->tx_packets = hw_stats->tx_ok;
1503 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1504 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1505 net_stats->multicast = hw_stats->rx_mcast;
1506 net_stats->collisions = hw_stats->tx_1_col +
1507 hw_stats->tx_2_col * 2 +
1508 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1509 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1510 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1511 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1512 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1513 net_stats->rx_length_errors = hw_stats->rx_len_err;
1514 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1515 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1516 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1517
1518 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1519
1520 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1521 hw_stats->tx_underrun + hw_stats->tx_trunc;
1522 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1523 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1524 net_stats->tx_window_errors = hw_stats->tx_late_col;
1525
1526 return net_stats;
1527 }
1528
1529 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1530 {
1531 u16 phy_data;
1532
1533 spin_lock(&adapter->mdio_lock);
1534 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1535 spin_unlock(&adapter->mdio_lock);
1536 }
1537
1538 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1539 enum atl1c_trans_queue type)
1540 {
1541 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1542 struct atl1c_buffer *buffer_info;
1543 struct pci_dev *pdev = adapter->pdev;
1544 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1545 u16 hw_next_to_clean;
1546 u16 reg;
1547
1548 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1549
1550 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1551
1552 while (next_to_clean != hw_next_to_clean) {
1553 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1554 atl1c_clean_buffer(pdev, buffer_info, 1);
1555 if (++next_to_clean == tpd_ring->count)
1556 next_to_clean = 0;
1557 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1558 }
1559
1560 if (netif_queue_stopped(adapter->netdev) &&
1561 netif_carrier_ok(adapter->netdev)) {
1562 netif_wake_queue(adapter->netdev);
1563 }
1564
1565 return true;
1566 }
1567
1568 /**
1569 * atl1c_intr - Interrupt Handler
1570 * @irq: interrupt number
1571 * @data: pointer to a network interface device structure
1572 */
1573 static irqreturn_t atl1c_intr(int irq, void *data)
1574 {
1575 struct net_device *netdev = data;
1576 struct atl1c_adapter *adapter = netdev_priv(netdev);
1577 struct pci_dev *pdev = adapter->pdev;
1578 struct atl1c_hw *hw = &adapter->hw;
1579 int max_ints = AT_MAX_INT_WORK;
1580 int handled = IRQ_NONE;
1581 u32 status;
1582 u32 reg_data;
1583
1584 do {
1585 AT_READ_REG(hw, REG_ISR, &reg_data);
1586 status = reg_data & hw->intr_mask;
1587
1588 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1589 if (max_ints != AT_MAX_INT_WORK)
1590 handled = IRQ_HANDLED;
1591 break;
1592 }
1593 /* link event */
1594 if (status & ISR_GPHY)
1595 atl1c_clear_phy_int(adapter);
1596 /* Ack ISR */
1597 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1598 if (status & ISR_RX_PKT) {
1599 if (likely(napi_schedule_prep(&adapter->napi))) {
1600 hw->intr_mask &= ~ISR_RX_PKT;
1601 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1602 __napi_schedule(&adapter->napi);
1603 }
1604 }
1605 if (status & ISR_TX_PKT)
1606 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1607
1608 handled = IRQ_HANDLED;
1609 /* check if PCIE PHY Link down */
1610 if (status & ISR_ERROR) {
1611 if (netif_msg_hw(adapter))
1612 dev_err(&pdev->dev,
1613 "atl1c hardware error (status = 0x%x)\n",
1614 status & ISR_ERROR);
1615 /* reset MAC */
1616 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1617 schedule_work(&adapter->common_task);
1618 return IRQ_HANDLED;
1619 }
1620
1621 if (status & ISR_OVER)
1622 if (netif_msg_intr(adapter))
1623 dev_warn(&pdev->dev,
1624 "TX/RX overflow (status = 0x%x)\n",
1625 status & ISR_OVER);
1626
1627 /* link event */
1628 if (status & (ISR_GPHY | ISR_MANUAL)) {
1629 netdev->stats.tx_carrier_errors++;
1630 atl1c_link_chg_event(adapter);
1631 break;
1632 }
1633
1634 } while (--max_ints > 0);
1635 /* re-enable Interrupt*/
1636 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1637 return handled;
1638 }
1639
1640 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1641 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1642 {
1643 /*
1644 * The pid field in RRS in not correct sometimes, so we
1645 * cannot figure out if the packet is fragmented or not,
1646 * so we tell the KERNEL CHECKSUM_NONE
1647 */
1648 skb_checksum_none_assert(skb);
1649 }
1650
1651 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1652 {
1653 struct sk_buff *skb;
1654 struct page *page;
1655
1656 if (adapter->rx_frag_size > PAGE_SIZE)
1657 return netdev_alloc_skb(adapter->netdev,
1658 adapter->rx_buffer_len);
1659
1660 page = adapter->rx_page;
1661 if (!page) {
1662 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1663 if (unlikely(!page))
1664 return NULL;
1665 adapter->rx_page_offset = 0;
1666 }
1667
1668 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1669 adapter->rx_frag_size);
1670 if (likely(skb)) {
1671 adapter->rx_page_offset += adapter->rx_frag_size;
1672 if (adapter->rx_page_offset >= PAGE_SIZE)
1673 adapter->rx_page = NULL;
1674 else
1675 get_page(page);
1676 }
1677 return skb;
1678 }
1679
1680 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1681 {
1682 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1683 struct pci_dev *pdev = adapter->pdev;
1684 struct atl1c_buffer *buffer_info, *next_info;
1685 struct sk_buff *skb;
1686 void *vir_addr = NULL;
1687 u16 num_alloc = 0;
1688 u16 rfd_next_to_use, next_next;
1689 struct atl1c_rx_free_desc *rfd_desc;
1690 dma_addr_t mapping;
1691
1692 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1693 if (++next_next == rfd_ring->count)
1694 next_next = 0;
1695 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1696 next_info = &rfd_ring->buffer_info[next_next];
1697
1698 while (next_info->flags & ATL1C_BUFFER_FREE) {
1699 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1700
1701 skb = atl1c_alloc_skb(adapter);
1702 if (unlikely(!skb)) {
1703 if (netif_msg_rx_err(adapter))
1704 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1705 break;
1706 }
1707
1708 /*
1709 * Make buffer alignment 2 beyond a 16 byte boundary
1710 * this will result in a 16 byte aligned IP header after
1711 * the 14 byte MAC header is removed
1712 */
1713 vir_addr = skb->data;
1714 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1715 buffer_info->skb = skb;
1716 buffer_info->length = adapter->rx_buffer_len;
1717 mapping = pci_map_single(pdev, vir_addr,
1718 buffer_info->length,
1719 PCI_DMA_FROMDEVICE);
1720 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1721 dev_kfree_skb(skb);
1722 buffer_info->skb = NULL;
1723 buffer_info->length = 0;
1724 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1725 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1726 break;
1727 }
1728 buffer_info->dma = mapping;
1729 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1730 ATL1C_PCIMAP_FROMDEVICE);
1731 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1732 rfd_next_to_use = next_next;
1733 if (++next_next == rfd_ring->count)
1734 next_next = 0;
1735 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1736 next_info = &rfd_ring->buffer_info[next_next];
1737 num_alloc++;
1738 }
1739
1740 if (num_alloc) {
1741 /* TODO: update mailbox here */
1742 wmb();
1743 rfd_ring->next_to_use = rfd_next_to_use;
1744 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1745 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1746 }
1747
1748 return num_alloc;
1749 }
1750
1751 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1752 struct atl1c_recv_ret_status *rrs, u16 num)
1753 {
1754 u16 i;
1755 /* the relationship between rrd and rfd is one map one */
1756 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1757 rrd_ring->next_to_clean)) {
1758 rrs->word3 &= ~RRS_RXD_UPDATED;
1759 if (++rrd_ring->next_to_clean == rrd_ring->count)
1760 rrd_ring->next_to_clean = 0;
1761 }
1762 }
1763
1764 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1765 struct atl1c_recv_ret_status *rrs, u16 num)
1766 {
1767 u16 i;
1768 u16 rfd_index;
1769 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1770
1771 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1772 RRS_RX_RFD_INDEX_MASK;
1773 for (i = 0; i < num; i++) {
1774 buffer_info[rfd_index].skb = NULL;
1775 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1776 ATL1C_BUFFER_FREE);
1777 if (++rfd_index == rfd_ring->count)
1778 rfd_index = 0;
1779 }
1780 rfd_ring->next_to_clean = rfd_index;
1781 }
1782
1783 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1784 int *work_done, int work_to_do)
1785 {
1786 u16 rfd_num, rfd_index;
1787 u16 count = 0;
1788 u16 length;
1789 struct pci_dev *pdev = adapter->pdev;
1790 struct net_device *netdev = adapter->netdev;
1791 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1792 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1793 struct sk_buff *skb;
1794 struct atl1c_recv_ret_status *rrs;
1795 struct atl1c_buffer *buffer_info;
1796
1797 while (1) {
1798 if (*work_done >= work_to_do)
1799 break;
1800 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1801 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1802 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1803 RRS_RX_RFD_CNT_MASK;
1804 if (unlikely(rfd_num != 1))
1805 /* TODO support mul rfd*/
1806 if (netif_msg_rx_err(adapter))
1807 dev_warn(&pdev->dev,
1808 "Multi rfd not support yet!\n");
1809 goto rrs_checked;
1810 } else {
1811 break;
1812 }
1813 rrs_checked:
1814 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1815 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1816 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1817 if (netif_msg_rx_err(adapter))
1818 dev_warn(&pdev->dev,
1819 "wrong packet! rrs word3 is %x\n",
1820 rrs->word3);
1821 continue;
1822 }
1823
1824 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1825 RRS_PKT_SIZE_MASK);
1826 /* Good Receive */
1827 if (likely(rfd_num == 1)) {
1828 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1829 RRS_RX_RFD_INDEX_MASK;
1830 buffer_info = &rfd_ring->buffer_info[rfd_index];
1831 pci_unmap_single(pdev, buffer_info->dma,
1832 buffer_info->length, PCI_DMA_FROMDEVICE);
1833 skb = buffer_info->skb;
1834 } else {
1835 /* TODO */
1836 if (netif_msg_rx_err(adapter))
1837 dev_warn(&pdev->dev,
1838 "Multi rfd not support yet!\n");
1839 break;
1840 }
1841 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1842 skb_put(skb, length - ETH_FCS_LEN);
1843 skb->protocol = eth_type_trans(skb, netdev);
1844 atl1c_rx_checksum(adapter, skb, rrs);
1845 if (rrs->word3 & RRS_VLAN_INS) {
1846 u16 vlan;
1847
1848 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1849 vlan = le16_to_cpu(vlan);
1850 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1851 }
1852 netif_receive_skb(skb);
1853
1854 (*work_done)++;
1855 count++;
1856 }
1857 if (count)
1858 atl1c_alloc_rx_buffer(adapter);
1859 }
1860
1861 /**
1862 * atl1c_clean - NAPI Rx polling callback
1863 */
1864 static int atl1c_clean(struct napi_struct *napi, int budget)
1865 {
1866 struct atl1c_adapter *adapter =
1867 container_of(napi, struct atl1c_adapter, napi);
1868 int work_done = 0;
1869
1870 /* Keep link state information with original netdev */
1871 if (!netif_carrier_ok(adapter->netdev))
1872 goto quit_polling;
1873 /* just enable one RXQ */
1874 atl1c_clean_rx_irq(adapter, &work_done, budget);
1875
1876 if (work_done < budget) {
1877 quit_polling:
1878 napi_complete(napi);
1879 adapter->hw.intr_mask |= ISR_RX_PKT;
1880 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1881 }
1882 return work_done;
1883 }
1884
1885 #ifdef CONFIG_NET_POLL_CONTROLLER
1886
1887 /*
1888 * Polling 'interrupt' - used by things like netconsole to send skbs
1889 * without having to re-enable interrupts. It's not called while
1890 * the interrupt routine is executing.
1891 */
1892 static void atl1c_netpoll(struct net_device *netdev)
1893 {
1894 struct atl1c_adapter *adapter = netdev_priv(netdev);
1895
1896 disable_irq(adapter->pdev->irq);
1897 atl1c_intr(adapter->pdev->irq, netdev);
1898 enable_irq(adapter->pdev->irq);
1899 }
1900 #endif
1901
1902 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1903 {
1904 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1905 u16 next_to_use = 0;
1906 u16 next_to_clean = 0;
1907
1908 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1909 next_to_use = tpd_ring->next_to_use;
1910
1911 return (u16)(next_to_clean > next_to_use) ?
1912 (next_to_clean - next_to_use - 1) :
1913 (tpd_ring->count + next_to_clean - next_to_use - 1);
1914 }
1915
1916 /*
1917 * get next usable tpd
1918 * Note: should call atl1c_tdp_avail to make sure
1919 * there is enough tpd to use
1920 */
1921 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1922 enum atl1c_trans_queue type)
1923 {
1924 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1925 struct atl1c_tpd_desc *tpd_desc;
1926 u16 next_to_use = 0;
1927
1928 next_to_use = tpd_ring->next_to_use;
1929 if (++tpd_ring->next_to_use == tpd_ring->count)
1930 tpd_ring->next_to_use = 0;
1931 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1932 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1933 return tpd_desc;
1934 }
1935
1936 static struct atl1c_buffer *
1937 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1938 {
1939 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1940
1941 return &tpd_ring->buffer_info[tpd -
1942 (struct atl1c_tpd_desc *)tpd_ring->desc];
1943 }
1944
1945 /* Calculate the transmit packet descript needed*/
1946 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1947 {
1948 u16 tpd_req;
1949 u16 proto_hdr_len = 0;
1950
1951 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1952
1953 if (skb_is_gso(skb)) {
1954 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1955 if (proto_hdr_len < skb_headlen(skb))
1956 tpd_req++;
1957 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1958 tpd_req++;
1959 }
1960 return tpd_req;
1961 }
1962
1963 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1964 struct sk_buff *skb,
1965 struct atl1c_tpd_desc **tpd,
1966 enum atl1c_trans_queue type)
1967 {
1968 struct pci_dev *pdev = adapter->pdev;
1969 u8 hdr_len;
1970 u32 real_len;
1971 unsigned short offload_type;
1972 int err;
1973
1974 if (skb_is_gso(skb)) {
1975 if (skb_header_cloned(skb)) {
1976 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1977 if (unlikely(err))
1978 return -1;
1979 }
1980 offload_type = skb_shinfo(skb)->gso_type;
1981
1982 if (offload_type & SKB_GSO_TCPV4) {
1983 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1984 + ntohs(ip_hdr(skb)->tot_len));
1985
1986 if (real_len < skb->len)
1987 pskb_trim(skb, real_len);
1988
1989 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1990 if (unlikely(skb->len == hdr_len)) {
1991 /* only xsum need */
1992 if (netif_msg_tx_queued(adapter))
1993 dev_warn(&pdev->dev,
1994 "IPV4 tso with zero data??\n");
1995 goto check_sum;
1996 } else {
1997 ip_hdr(skb)->check = 0;
1998 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1999 ip_hdr(skb)->saddr,
2000 ip_hdr(skb)->daddr,
2001 0, IPPROTO_TCP, 0);
2002 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2003 }
2004 }
2005
2006 if (offload_type & SKB_GSO_TCPV6) {
2007 struct atl1c_tpd_ext_desc *etpd =
2008 *(struct atl1c_tpd_ext_desc **)(tpd);
2009
2010 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2011 *tpd = atl1c_get_tpd(adapter, type);
2012 ipv6_hdr(skb)->payload_len = 0;
2013 /* check payload == 0 byte ? */
2014 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2015 if (unlikely(skb->len == hdr_len)) {
2016 /* only xsum need */
2017 if (netif_msg_tx_queued(adapter))
2018 dev_warn(&pdev->dev,
2019 "IPV6 tso with zero data??\n");
2020 goto check_sum;
2021 } else
2022 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2023 &ipv6_hdr(skb)->saddr,
2024 &ipv6_hdr(skb)->daddr,
2025 0, IPPROTO_TCP, 0);
2026 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2027 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2028 etpd->pkt_len = cpu_to_le32(skb->len);
2029 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2030 }
2031
2032 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2033 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2034 TPD_TCPHDR_OFFSET_SHIFT;
2035 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2036 TPD_MSS_SHIFT;
2037 return 0;
2038 }
2039
2040 check_sum:
2041 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2042 u8 css, cso;
2043 cso = skb_checksum_start_offset(skb);
2044
2045 if (unlikely(cso & 0x1)) {
2046 if (netif_msg_tx_err(adapter))
2047 dev_err(&adapter->pdev->dev,
2048 "payload offset should not an event number\n");
2049 return -1;
2050 } else {
2051 css = cso + skb->csum_offset;
2052
2053 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2054 TPD_PLOADOFFSET_SHIFT;
2055 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2056 TPD_CCSUM_OFFSET_SHIFT;
2057 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2058 }
2059 }
2060 return 0;
2061 }
2062
2063 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2064 struct atl1c_tpd_desc *first_tpd,
2065 enum atl1c_trans_queue type)
2066 {
2067 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2068 struct atl1c_buffer *buffer_info;
2069 struct atl1c_tpd_desc *tpd;
2070 u16 first_index, index;
2071
2072 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2073 index = first_index;
2074 while (index != tpd_ring->next_to_use) {
2075 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2076 buffer_info = &tpd_ring->buffer_info[index];
2077 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2078 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2079 if (++index == tpd_ring->count)
2080 index = 0;
2081 }
2082 tpd_ring->next_to_use = first_index;
2083 }
2084
2085 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2086 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2087 enum atl1c_trans_queue type)
2088 {
2089 struct atl1c_tpd_desc *use_tpd = NULL;
2090 struct atl1c_buffer *buffer_info = NULL;
2091 u16 buf_len = skb_headlen(skb);
2092 u16 map_len = 0;
2093 u16 mapped_len = 0;
2094 u16 hdr_len = 0;
2095 u16 nr_frags;
2096 u16 f;
2097 int tso;
2098
2099 nr_frags = skb_shinfo(skb)->nr_frags;
2100 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2101 if (tso) {
2102 /* TSO */
2103 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2104 use_tpd = tpd;
2105
2106 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2107 buffer_info->length = map_len;
2108 buffer_info->dma = pci_map_single(adapter->pdev,
2109 skb->data, hdr_len, PCI_DMA_TODEVICE);
2110 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2111 buffer_info->dma)))
2112 goto err_dma;
2113 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2114 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2115 ATL1C_PCIMAP_TODEVICE);
2116 mapped_len += map_len;
2117 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2118 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2119 }
2120
2121 if (mapped_len < buf_len) {
2122 /* mapped_len == 0, means we should use the first tpd,
2123 which is given by caller */
2124 if (mapped_len == 0)
2125 use_tpd = tpd;
2126 else {
2127 use_tpd = atl1c_get_tpd(adapter, type);
2128 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2129 }
2130 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2131 buffer_info->length = buf_len - mapped_len;
2132 buffer_info->dma =
2133 pci_map_single(adapter->pdev, skb->data + mapped_len,
2134 buffer_info->length, PCI_DMA_TODEVICE);
2135 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2136 buffer_info->dma)))
2137 goto err_dma;
2138
2139 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2140 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2141 ATL1C_PCIMAP_TODEVICE);
2142 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2143 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2144 }
2145
2146 for (f = 0; f < nr_frags; f++) {
2147 struct skb_frag_struct *frag;
2148
2149 frag = &skb_shinfo(skb)->frags[f];
2150
2151 use_tpd = atl1c_get_tpd(adapter, type);
2152 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2153
2154 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2155 buffer_info->length = skb_frag_size(frag);
2156 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2157 frag, 0,
2158 buffer_info->length,
2159 DMA_TO_DEVICE);
2160 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2161 goto err_dma;
2162
2163 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2164 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2165 ATL1C_PCIMAP_TODEVICE);
2166 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2167 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2168 }
2169
2170 /* The last tpd */
2171 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2172 /* The last buffer info contain the skb address,
2173 so it will be free after unmap */
2174 buffer_info->skb = skb;
2175
2176 return 0;
2177
2178 err_dma:
2179 buffer_info->dma = 0;
2180 buffer_info->length = 0;
2181 return -1;
2182 }
2183
2184 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2185 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2186 {
2187 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2188 u16 reg;
2189
2190 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2191 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2192 }
2193
2194 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2195 struct net_device *netdev)
2196 {
2197 struct atl1c_adapter *adapter = netdev_priv(netdev);
2198 unsigned long flags;
2199 u16 tpd_req = 1;
2200 struct atl1c_tpd_desc *tpd;
2201 enum atl1c_trans_queue type = atl1c_trans_normal;
2202
2203 if (test_bit(__AT_DOWN, &adapter->flags)) {
2204 dev_kfree_skb_any(skb);
2205 return NETDEV_TX_OK;
2206 }
2207
2208 tpd_req = atl1c_cal_tpd_req(skb);
2209 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2210 if (netif_msg_pktdata(adapter))
2211 dev_info(&adapter->pdev->dev, "tx locked\n");
2212 return NETDEV_TX_LOCKED;
2213 }
2214
2215 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2216 /* no enough descriptor, just stop queue */
2217 netif_stop_queue(netdev);
2218 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2219 return NETDEV_TX_BUSY;
2220 }
2221
2222 tpd = atl1c_get_tpd(adapter, type);
2223
2224 /* do TSO and check sum */
2225 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2226 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2227 dev_kfree_skb_any(skb);
2228 return NETDEV_TX_OK;
2229 }
2230
2231 if (unlikely(vlan_tx_tag_present(skb))) {
2232 u16 vlan = vlan_tx_tag_get(skb);
2233 __le16 tag;
2234
2235 vlan = cpu_to_le16(vlan);
2236 AT_VLAN_TO_TAG(vlan, tag);
2237 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2238 tpd->vlan_tag = tag;
2239 }
2240
2241 if (skb_network_offset(skb) != ETH_HLEN)
2242 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2243
2244 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2245 netif_info(adapter, tx_done, adapter->netdev,
2246 "tx-skb droppted due to dma error\n");
2247 /* roll back tpd/buffer */
2248 atl1c_tx_rollback(adapter, tpd, type);
2249 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2250 dev_kfree_skb(skb);
2251 } else {
2252 atl1c_tx_queue(adapter, skb, tpd, type);
2253 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2254 }
2255
2256 return NETDEV_TX_OK;
2257 }
2258
2259 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2260 {
2261 struct net_device *netdev = adapter->netdev;
2262
2263 free_irq(adapter->pdev->irq, netdev);
2264
2265 if (adapter->have_msi)
2266 pci_disable_msi(adapter->pdev);
2267 }
2268
2269 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2270 {
2271 struct pci_dev *pdev = adapter->pdev;
2272 struct net_device *netdev = adapter->netdev;
2273 int flags = 0;
2274 int err = 0;
2275
2276 adapter->have_msi = true;
2277 err = pci_enable_msi(adapter->pdev);
2278 if (err) {
2279 if (netif_msg_ifup(adapter))
2280 dev_err(&pdev->dev,
2281 "Unable to allocate MSI interrupt Error: %d\n",
2282 err);
2283 adapter->have_msi = false;
2284 }
2285
2286 if (!adapter->have_msi)
2287 flags |= IRQF_SHARED;
2288 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2289 netdev->name, netdev);
2290 if (err) {
2291 if (netif_msg_ifup(adapter))
2292 dev_err(&pdev->dev,
2293 "Unable to allocate interrupt Error: %d\n",
2294 err);
2295 if (adapter->have_msi)
2296 pci_disable_msi(adapter->pdev);
2297 return err;
2298 }
2299 if (netif_msg_ifup(adapter))
2300 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2301 return err;
2302 }
2303
2304
2305 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2306 {
2307 /* release tx-pending skbs and reset tx/rx ring index */
2308 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2309 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2310 atl1c_clean_rx_ring(adapter);
2311 }
2312
2313 static int atl1c_up(struct atl1c_adapter *adapter)
2314 {
2315 struct net_device *netdev = adapter->netdev;
2316 int err;
2317
2318 netif_carrier_off(netdev);
2319
2320 err = atl1c_configure(adapter);
2321 if (unlikely(err))
2322 goto err_up;
2323
2324 err = atl1c_request_irq(adapter);
2325 if (unlikely(err))
2326 goto err_up;
2327
2328 atl1c_check_link_status(adapter);
2329 clear_bit(__AT_DOWN, &adapter->flags);
2330 napi_enable(&adapter->napi);
2331 atl1c_irq_enable(adapter);
2332 netif_start_queue(netdev);
2333 return err;
2334
2335 err_up:
2336 atl1c_clean_rx_ring(adapter);
2337 return err;
2338 }
2339
2340 static void atl1c_down(struct atl1c_adapter *adapter)
2341 {
2342 struct net_device *netdev = adapter->netdev;
2343
2344 atl1c_del_timer(adapter);
2345 adapter->work_event = 0; /* clear all event */
2346 /* signal that we're down so the interrupt handler does not
2347 * reschedule our watchdog timer */
2348 set_bit(__AT_DOWN, &adapter->flags);
2349 netif_carrier_off(netdev);
2350 napi_disable(&adapter->napi);
2351 atl1c_irq_disable(adapter);
2352 atl1c_free_irq(adapter);
2353 /* disable ASPM if device inactive */
2354 atl1c_disable_l0s_l1(&adapter->hw);
2355 /* reset MAC to disable all RX/TX */
2356 atl1c_reset_mac(&adapter->hw);
2357 msleep(1);
2358
2359 adapter->link_speed = SPEED_0;
2360 adapter->link_duplex = -1;
2361 atl1c_reset_dma_ring(adapter);
2362 }
2363
2364 /**
2365 * atl1c_open - Called when a network interface is made active
2366 * @netdev: network interface device structure
2367 *
2368 * Returns 0 on success, negative value on failure
2369 *
2370 * The open entry point is called when a network interface is made
2371 * active by the system (IFF_UP). At this point all resources needed
2372 * for transmit and receive operations are allocated, the interrupt
2373 * handler is registered with the OS, the watchdog timer is started,
2374 * and the stack is notified that the interface is ready.
2375 */
2376 static int atl1c_open(struct net_device *netdev)
2377 {
2378 struct atl1c_adapter *adapter = netdev_priv(netdev);
2379 int err;
2380
2381 /* disallow open during test */
2382 if (test_bit(__AT_TESTING, &adapter->flags))
2383 return -EBUSY;
2384
2385 /* allocate rx/tx dma buffer & descriptors */
2386 err = atl1c_setup_ring_resources(adapter);
2387 if (unlikely(err))
2388 return err;
2389
2390 err = atl1c_up(adapter);
2391 if (unlikely(err))
2392 goto err_up;
2393
2394 return 0;
2395
2396 err_up:
2397 atl1c_free_irq(adapter);
2398 atl1c_free_ring_resources(adapter);
2399 atl1c_reset_mac(&adapter->hw);
2400 return err;
2401 }
2402
2403 /**
2404 * atl1c_close - Disables a network interface
2405 * @netdev: network interface device structure
2406 *
2407 * Returns 0, this is not allowed to fail
2408 *
2409 * The close entry point is called when an interface is de-activated
2410 * by the OS. The hardware is still under the drivers control, but
2411 * needs to be disabled. A global MAC reset is issued to stop the
2412 * hardware, and all transmit and receive resources are freed.
2413 */
2414 static int atl1c_close(struct net_device *netdev)
2415 {
2416 struct atl1c_adapter *adapter = netdev_priv(netdev);
2417
2418 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2419 set_bit(__AT_DOWN, &adapter->flags);
2420 cancel_work_sync(&adapter->common_task);
2421 atl1c_down(adapter);
2422 atl1c_free_ring_resources(adapter);
2423 return 0;
2424 }
2425
2426 static int atl1c_suspend(struct device *dev)
2427 {
2428 struct pci_dev *pdev = to_pci_dev(dev);
2429 struct net_device *netdev = pci_get_drvdata(pdev);
2430 struct atl1c_adapter *adapter = netdev_priv(netdev);
2431 struct atl1c_hw *hw = &adapter->hw;
2432 u32 wufc = adapter->wol;
2433
2434 atl1c_disable_l0s_l1(hw);
2435 if (netif_running(netdev)) {
2436 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2437 atl1c_down(adapter);
2438 }
2439 netif_device_detach(netdev);
2440
2441 if (wufc)
2442 if (atl1c_phy_to_ps_link(hw) != 0)
2443 dev_dbg(&pdev->dev, "phy power saving failed");
2444
2445 atl1c_power_saving(hw, wufc);
2446
2447 return 0;
2448 }
2449
2450 #ifdef CONFIG_PM_SLEEP
2451 static int atl1c_resume(struct device *dev)
2452 {
2453 struct pci_dev *pdev = to_pci_dev(dev);
2454 struct net_device *netdev = pci_get_drvdata(pdev);
2455 struct atl1c_adapter *adapter = netdev_priv(netdev);
2456
2457 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2458 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2459
2460 atl1c_phy_reset(&adapter->hw);
2461 atl1c_reset_mac(&adapter->hw);
2462 atl1c_phy_init(&adapter->hw);
2463
2464 #if 0
2465 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2466 pm_data &= ~PM_CTRLSTAT_PME_EN;
2467 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2468 #endif
2469
2470 netif_device_attach(netdev);
2471 if (netif_running(netdev))
2472 atl1c_up(adapter);
2473
2474 return 0;
2475 }
2476 #endif
2477
2478 static void atl1c_shutdown(struct pci_dev *pdev)
2479 {
2480 struct net_device *netdev = pci_get_drvdata(pdev);
2481 struct atl1c_adapter *adapter = netdev_priv(netdev);
2482
2483 atl1c_suspend(&pdev->dev);
2484 pci_wake_from_d3(pdev, adapter->wol);
2485 pci_set_power_state(pdev, PCI_D3hot);
2486 }
2487
2488 static const struct net_device_ops atl1c_netdev_ops = {
2489 .ndo_open = atl1c_open,
2490 .ndo_stop = atl1c_close,
2491 .ndo_validate_addr = eth_validate_addr,
2492 .ndo_start_xmit = atl1c_xmit_frame,
2493 .ndo_set_mac_address = atl1c_set_mac_addr,
2494 .ndo_set_rx_mode = atl1c_set_multi,
2495 .ndo_change_mtu = atl1c_change_mtu,
2496 .ndo_fix_features = atl1c_fix_features,
2497 .ndo_set_features = atl1c_set_features,
2498 .ndo_do_ioctl = atl1c_ioctl,
2499 .ndo_tx_timeout = atl1c_tx_timeout,
2500 .ndo_get_stats = atl1c_get_stats,
2501 #ifdef CONFIG_NET_POLL_CONTROLLER
2502 .ndo_poll_controller = atl1c_netpoll,
2503 #endif
2504 };
2505
2506 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2507 {
2508 SET_NETDEV_DEV(netdev, &pdev->dev);
2509 pci_set_drvdata(pdev, netdev);
2510
2511 netdev->netdev_ops = &atl1c_netdev_ops;
2512 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2513 atl1c_set_ethtool_ops(netdev);
2514
2515 /* TODO: add when ready */
2516 netdev->hw_features = NETIF_F_SG |
2517 NETIF_F_HW_CSUM |
2518 NETIF_F_HW_VLAN_CTAG_RX |
2519 NETIF_F_TSO |
2520 NETIF_F_TSO6;
2521 netdev->features = netdev->hw_features |
2522 NETIF_F_HW_VLAN_CTAG_TX;
2523 return 0;
2524 }
2525
2526 /**
2527 * atl1c_probe - Device Initialization Routine
2528 * @pdev: PCI device information struct
2529 * @ent: entry in atl1c_pci_tbl
2530 *
2531 * Returns 0 on success, negative on failure
2532 *
2533 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2534 * The OS initialization, configuring of the adapter private structure,
2535 * and a hardware reset occur.
2536 */
2537 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2538 {
2539 struct net_device *netdev;
2540 struct atl1c_adapter *adapter;
2541 static int cards_found;
2542
2543 int err = 0;
2544
2545 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2546 err = pci_enable_device_mem(pdev);
2547 if (err) {
2548 dev_err(&pdev->dev, "cannot enable PCI device\n");
2549 return err;
2550 }
2551
2552 /*
2553 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2554 * shared register for the high 32 bits, so only a single, aligned,
2555 * 4 GB physical address range can be used at a time.
2556 *
2557 * Supporting 64-bit DMA on this hardware is more trouble than it's
2558 * worth. It is far easier to limit to 32-bit DMA than update
2559 * various kernel subsystems to support the mechanics required by a
2560 * fixed-high-32-bit system.
2561 */
2562 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2563 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2564 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2565 goto err_dma;
2566 }
2567
2568 err = pci_request_regions(pdev, atl1c_driver_name);
2569 if (err) {
2570 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2571 goto err_pci_reg;
2572 }
2573
2574 pci_set_master(pdev);
2575
2576 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2577 if (netdev == NULL) {
2578 err = -ENOMEM;
2579 goto err_alloc_etherdev;
2580 }
2581
2582 err = atl1c_init_netdev(netdev, pdev);
2583 if (err) {
2584 dev_err(&pdev->dev, "init netdevice failed\n");
2585 goto err_init_netdev;
2586 }
2587 adapter = netdev_priv(netdev);
2588 adapter->bd_number = cards_found;
2589 adapter->netdev = netdev;
2590 adapter->pdev = pdev;
2591 adapter->hw.adapter = adapter;
2592 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2593 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2594 if (!adapter->hw.hw_addr) {
2595 err = -EIO;
2596 dev_err(&pdev->dev, "cannot map device registers\n");
2597 goto err_ioremap;
2598 }
2599
2600 /* init mii data */
2601 adapter->mii.dev = netdev;
2602 adapter->mii.mdio_read = atl1c_mdio_read;
2603 adapter->mii.mdio_write = atl1c_mdio_write;
2604 adapter->mii.phy_id_mask = 0x1f;
2605 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2606 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2607 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2608 (unsigned long)adapter);
2609 /* setup the private structure */
2610 err = atl1c_sw_init(adapter);
2611 if (err) {
2612 dev_err(&pdev->dev, "net device private data init failed\n");
2613 goto err_sw_init;
2614 }
2615 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2616
2617 /* Init GPHY as early as possible due to power saving issue */
2618 atl1c_phy_reset(&adapter->hw);
2619
2620 err = atl1c_reset_mac(&adapter->hw);
2621 if (err) {
2622 err = -EIO;
2623 goto err_reset;
2624 }
2625
2626 /* reset the controller to
2627 * put the device in a known good starting state */
2628 err = atl1c_phy_init(&adapter->hw);
2629 if (err) {
2630 err = -EIO;
2631 goto err_reset;
2632 }
2633 if (atl1c_read_mac_addr(&adapter->hw)) {
2634 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2635 netdev->addr_assign_type = NET_ADDR_RANDOM;
2636 }
2637 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2638 if (netif_msg_probe(adapter))
2639 dev_dbg(&pdev->dev, "mac address : %pM\n",
2640 adapter->hw.mac_addr);
2641
2642 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2643 INIT_WORK(&adapter->common_task, atl1c_common_task);
2644 adapter->work_event = 0;
2645 err = register_netdev(netdev);
2646 if (err) {
2647 dev_err(&pdev->dev, "register netdevice failed\n");
2648 goto err_register;
2649 }
2650
2651 if (netif_msg_probe(adapter))
2652 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2653 cards_found++;
2654 return 0;
2655
2656 err_reset:
2657 err_register:
2658 err_sw_init:
2659 iounmap(adapter->hw.hw_addr);
2660 err_init_netdev:
2661 err_ioremap:
2662 free_netdev(netdev);
2663 err_alloc_etherdev:
2664 pci_release_regions(pdev);
2665 err_pci_reg:
2666 err_dma:
2667 pci_disable_device(pdev);
2668 return err;
2669 }
2670
2671 /**
2672 * atl1c_remove - Device Removal Routine
2673 * @pdev: PCI device information struct
2674 *
2675 * atl1c_remove is called by the PCI subsystem to alert the driver
2676 * that it should release a PCI device. The could be caused by a
2677 * Hot-Plug event, or because the driver is going to be removed from
2678 * memory.
2679 */
2680 static void atl1c_remove(struct pci_dev *pdev)
2681 {
2682 struct net_device *netdev = pci_get_drvdata(pdev);
2683 struct atl1c_adapter *adapter = netdev_priv(netdev);
2684
2685 unregister_netdev(netdev);
2686 /* restore permanent address */
2687 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2688 atl1c_phy_disable(&adapter->hw);
2689
2690 iounmap(adapter->hw.hw_addr);
2691
2692 pci_release_regions(pdev);
2693 pci_disable_device(pdev);
2694 free_netdev(netdev);
2695 }
2696
2697 /**
2698 * atl1c_io_error_detected - called when PCI error is detected
2699 * @pdev: Pointer to PCI device
2700 * @state: The current pci connection state
2701 *
2702 * This function is called after a PCI bus error affecting
2703 * this device has been detected.
2704 */
2705 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2706 pci_channel_state_t state)
2707 {
2708 struct net_device *netdev = pci_get_drvdata(pdev);
2709 struct atl1c_adapter *adapter = netdev_priv(netdev);
2710
2711 netif_device_detach(netdev);
2712
2713 if (state == pci_channel_io_perm_failure)
2714 return PCI_ERS_RESULT_DISCONNECT;
2715
2716 if (netif_running(netdev))
2717 atl1c_down(adapter);
2718
2719 pci_disable_device(pdev);
2720
2721 /* Request a slot slot reset. */
2722 return PCI_ERS_RESULT_NEED_RESET;
2723 }
2724
2725 /**
2726 * atl1c_io_slot_reset - called after the pci bus has been reset.
2727 * @pdev: Pointer to PCI device
2728 *
2729 * Restart the card from scratch, as if from a cold-boot. Implementation
2730 * resembles the first-half of the e1000_resume routine.
2731 */
2732 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2733 {
2734 struct net_device *netdev = pci_get_drvdata(pdev);
2735 struct atl1c_adapter *adapter = netdev_priv(netdev);
2736
2737 if (pci_enable_device(pdev)) {
2738 if (netif_msg_hw(adapter))
2739 dev_err(&pdev->dev,
2740 "Cannot re-enable PCI device after reset\n");
2741 return PCI_ERS_RESULT_DISCONNECT;
2742 }
2743 pci_set_master(pdev);
2744
2745 pci_enable_wake(pdev, PCI_D3hot, 0);
2746 pci_enable_wake(pdev, PCI_D3cold, 0);
2747
2748 atl1c_reset_mac(&adapter->hw);
2749
2750 return PCI_ERS_RESULT_RECOVERED;
2751 }
2752
2753 /**
2754 * atl1c_io_resume - called when traffic can start flowing again.
2755 * @pdev: Pointer to PCI device
2756 *
2757 * This callback is called when the error recovery driver tells us that
2758 * its OK to resume normal operation. Implementation resembles the
2759 * second-half of the atl1c_resume routine.
2760 */
2761 static void atl1c_io_resume(struct pci_dev *pdev)
2762 {
2763 struct net_device *netdev = pci_get_drvdata(pdev);
2764 struct atl1c_adapter *adapter = netdev_priv(netdev);
2765
2766 if (netif_running(netdev)) {
2767 if (atl1c_up(adapter)) {
2768 if (netif_msg_hw(adapter))
2769 dev_err(&pdev->dev,
2770 "Cannot bring device back up after reset\n");
2771 return;
2772 }
2773 }
2774
2775 netif_device_attach(netdev);
2776 }
2777
2778 static const struct pci_error_handlers atl1c_err_handler = {
2779 .error_detected = atl1c_io_error_detected,
2780 .slot_reset = atl1c_io_slot_reset,
2781 .resume = atl1c_io_resume,
2782 };
2783
2784 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2785
2786 static struct pci_driver atl1c_driver = {
2787 .name = atl1c_driver_name,
2788 .id_table = atl1c_pci_tbl,
2789 .probe = atl1c_probe,
2790 .remove = atl1c_remove,
2791 .shutdown = atl1c_shutdown,
2792 .err_handler = &atl1c_err_handler,
2793 .driver.pm = &atl1c_pm_ops,
2794 };
2795
2796 module_pci_driver(atl1c_driver);
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