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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net
[deliverable/linux.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 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 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 acess 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, int in_irq)
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 if (in_irq)
855 dev_kfree_skb_irq(buffer_info->skb);
856 else
857 dev_kfree_skb(buffer_info->skb);
858 }
859 buffer_info->dma = 0;
860 buffer_info->skb = NULL;
861 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
862 }
863 /**
864 * atl1c_clean_tx_ring - Free Tx-skb
865 * @adapter: board private structure
866 */
867 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
868 enum atl1c_trans_queue type)
869 {
870 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
871 struct atl1c_buffer *buffer_info;
872 struct pci_dev *pdev = adapter->pdev;
873 u16 index, ring_count;
874
875 ring_count = tpd_ring->count;
876 for (index = 0; index < ring_count; index++) {
877 buffer_info = &tpd_ring->buffer_info[index];
878 atl1c_clean_buffer(pdev, buffer_info, 0);
879 }
880
881 /* Zero out Tx-buffers */
882 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
883 ring_count);
884 atomic_set(&tpd_ring->next_to_clean, 0);
885 tpd_ring->next_to_use = 0;
886 }
887
888 /**
889 * atl1c_clean_rx_ring - Free rx-reservation skbs
890 * @adapter: board private structure
891 */
892 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
893 {
894 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
895 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
896 struct atl1c_buffer *buffer_info;
897 struct pci_dev *pdev = adapter->pdev;
898 int j;
899
900 for (j = 0; j < rfd_ring->count; j++) {
901 buffer_info = &rfd_ring->buffer_info[j];
902 atl1c_clean_buffer(pdev, buffer_info, 0);
903 }
904 /* zero out the descriptor ring */
905 memset(rfd_ring->desc, 0, rfd_ring->size);
906 rfd_ring->next_to_clean = 0;
907 rfd_ring->next_to_use = 0;
908 rrd_ring->next_to_use = 0;
909 rrd_ring->next_to_clean = 0;
910 }
911
912 /*
913 * Read / Write Ptr Initialize:
914 */
915 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
916 {
917 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
918 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
919 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
920 struct atl1c_buffer *buffer_info;
921 int i, j;
922
923 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
924 tpd_ring[i].next_to_use = 0;
925 atomic_set(&tpd_ring[i].next_to_clean, 0);
926 buffer_info = tpd_ring[i].buffer_info;
927 for (j = 0; j < tpd_ring->count; j++)
928 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
929 ATL1C_BUFFER_FREE);
930 }
931 rfd_ring->next_to_use = 0;
932 rfd_ring->next_to_clean = 0;
933 rrd_ring->next_to_use = 0;
934 rrd_ring->next_to_clean = 0;
935 for (j = 0; j < rfd_ring->count; j++) {
936 buffer_info = &rfd_ring->buffer_info[j];
937 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
938 }
939 }
940
941 /**
942 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
943 * @adapter: board private structure
944 *
945 * Free all transmit software resources
946 */
947 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
948 {
949 struct pci_dev *pdev = adapter->pdev;
950
951 pci_free_consistent(pdev, adapter->ring_header.size,
952 adapter->ring_header.desc,
953 adapter->ring_header.dma);
954 adapter->ring_header.desc = NULL;
955
956 /* Note: just free tdp_ring.buffer_info,
957 * it contain rfd_ring.buffer_info, do not double free */
958 if (adapter->tpd_ring[0].buffer_info) {
959 kfree(adapter->tpd_ring[0].buffer_info);
960 adapter->tpd_ring[0].buffer_info = NULL;
961 }
962 if (adapter->rx_page) {
963 put_page(adapter->rx_page);
964 adapter->rx_page = NULL;
965 }
966 }
967
968 /**
969 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
970 * @adapter: board private structure
971 *
972 * Return 0 on success, negative on failure
973 */
974 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
975 {
976 struct pci_dev *pdev = adapter->pdev;
977 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
978 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
979 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
980 struct atl1c_ring_header *ring_header = &adapter->ring_header;
981 int size;
982 int i;
983 int count = 0;
984 int rx_desc_count = 0;
985 u32 offset = 0;
986
987 rrd_ring->count = rfd_ring->count;
988 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
989 tpd_ring[i].count = tpd_ring[0].count;
990
991 /* 2 tpd queue, one high priority queue,
992 * another normal priority queue */
993 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
994 rfd_ring->count);
995 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
996 if (unlikely(!tpd_ring->buffer_info))
997 goto err_nomem;
998
999 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1000 tpd_ring[i].buffer_info =
1001 (tpd_ring->buffer_info + count);
1002 count += tpd_ring[i].count;
1003 }
1004
1005 rfd_ring->buffer_info =
1006 (tpd_ring->buffer_info + count);
1007 count += rfd_ring->count;
1008 rx_desc_count += rfd_ring->count;
1009
1010 /*
1011 * real ring DMA buffer
1012 * each ring/block may need up to 8 bytes for alignment, hence the
1013 * additional bytes tacked onto the end.
1014 */
1015 ring_header->size = size =
1016 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1017 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1018 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1019 8 * 4;
1020
1021 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1022 &ring_header->dma);
1023 if (unlikely(!ring_header->desc)) {
1024 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1025 goto err_nomem;
1026 }
1027 memset(ring_header->desc, 0, ring_header->size);
1028 /* init TPD ring */
1029
1030 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1031 offset = tpd_ring[0].dma - ring_header->dma;
1032 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1033 tpd_ring[i].dma = ring_header->dma + offset;
1034 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1035 tpd_ring[i].size =
1036 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1037 offset += roundup(tpd_ring[i].size, 8);
1038 }
1039 /* init RFD ring */
1040 rfd_ring->dma = ring_header->dma + offset;
1041 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1042 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1043 offset += roundup(rfd_ring->size, 8);
1044
1045 /* init RRD ring */
1046 rrd_ring->dma = ring_header->dma + offset;
1047 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1048 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1049 rrd_ring->count;
1050 offset += roundup(rrd_ring->size, 8);
1051
1052 return 0;
1053
1054 err_nomem:
1055 kfree(tpd_ring->buffer_info);
1056 return -ENOMEM;
1057 }
1058
1059 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1060 {
1061 struct atl1c_hw *hw = &adapter->hw;
1062 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1063 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1064 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1065 adapter->tpd_ring;
1066
1067 /* TPD */
1068 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1069 (u32)((tpd_ring[atl1c_trans_normal].dma &
1070 AT_DMA_HI_ADDR_MASK) >> 32));
1071 /* just enable normal priority TX queue */
1072 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1073 (u32)(tpd_ring[atl1c_trans_normal].dma &
1074 AT_DMA_LO_ADDR_MASK));
1075 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1076 (u32)(tpd_ring[atl1c_trans_high].dma &
1077 AT_DMA_LO_ADDR_MASK));
1078 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1079 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1080
1081
1082 /* RFD */
1083 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1084 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1085 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1086 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1087
1088 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1089 rfd_ring->count & RFD_RING_SIZE_MASK);
1090 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1091 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1092
1093 /* RRD */
1094 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1095 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1096 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1097 (rrd_ring->count & RRD_RING_SIZE_MASK));
1098
1099 if (hw->nic_type == athr_l2c_b) {
1100 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1101 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1102 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1103 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1104 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1105 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1106 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1107 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1108 }
1109 /* Load all of base address above */
1110 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1111 }
1112
1113 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1114 {
1115 struct atl1c_hw *hw = &adapter->hw;
1116 int max_pay_load;
1117 u16 tx_offload_thresh;
1118 u32 txq_ctrl_data;
1119
1120 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1121 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1122 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1123 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1124 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1125 /*
1126 * if BIOS had changed the dam-read-max-length to an invalid value,
1127 * restore it to default value
1128 */
1129 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1130 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1131 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1132 }
1133 txq_ctrl_data =
1134 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1135 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1136
1137 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1138 }
1139
1140 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1141 {
1142 struct atl1c_hw *hw = &adapter->hw;
1143 u32 rxq_ctrl_data;
1144
1145 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1146 RXQ_RFD_BURST_NUM_SHIFT;
1147
1148 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1149 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1150
1151 /* aspm for gigabit */
1152 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1153 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1154 ASPM_THRUPUT_LIMIT_100M);
1155
1156 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1157 }
1158
1159 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1160 {
1161 struct atl1c_hw *hw = &adapter->hw;
1162 u32 dma_ctrl_data;
1163
1164 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1165 DMA_CTRL_RREQ_PRI_DATA |
1166 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1167 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1168 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1169
1170 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1171 }
1172
1173 /*
1174 * Stop the mac, transmit and receive units
1175 * hw - Struct containing variables accessed by shared code
1176 * return : 0 or idle status (if error)
1177 */
1178 static int atl1c_stop_mac(struct atl1c_hw *hw)
1179 {
1180 u32 data;
1181
1182 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1183 data &= ~RXQ_CTRL_EN;
1184 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1185
1186 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1187 data &= ~TXQ_CTRL_EN;
1188 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1189
1190 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1191
1192 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1193 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1194 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1195
1196 return (int)atl1c_wait_until_idle(hw,
1197 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1198 }
1199
1200 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1201 {
1202 struct atl1c_hw *hw = &adapter->hw;
1203 u32 mac, txq, rxq;
1204
1205 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1206 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1207 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1208
1209 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1210 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1211 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1212
1213 txq |= TXQ_CTRL_EN;
1214 rxq |= RXQ_CTRL_EN;
1215 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1216 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1217 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1218 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1219 MAC_CTRL_HASH_ALG_CRC32;
1220 if (hw->mac_duplex)
1221 mac |= MAC_CTRL_DUPLX;
1222 else
1223 mac &= ~MAC_CTRL_DUPLX;
1224 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1225 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1226
1227 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1228 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1229 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1230 }
1231
1232 /*
1233 * Reset the transmit and receive units; mask and clear all interrupts.
1234 * hw - Struct containing variables accessed by shared code
1235 * return : 0 or idle status (if error)
1236 */
1237 static int atl1c_reset_mac(struct atl1c_hw *hw)
1238 {
1239 struct atl1c_adapter *adapter = hw->adapter;
1240 struct pci_dev *pdev = adapter->pdev;
1241 u32 ctrl_data = 0;
1242
1243 atl1c_stop_mac(hw);
1244 /*
1245 * Issue Soft Reset to the MAC. This will reset the chip's
1246 * transmit, receive, DMA. It will not effect
1247 * the current PCI configuration. The global reset bit is self-
1248 * clearing, and should clear within a microsecond.
1249 */
1250 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1251 ctrl_data |= MASTER_CTRL_OOB_DIS;
1252 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1253
1254 AT_WRITE_FLUSH(hw);
1255 msleep(10);
1256 /* Wait at least 10ms for All module to be Idle */
1257
1258 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1259 dev_err(&pdev->dev,
1260 "MAC state machine can't be idle since"
1261 " disabled for 10ms second\n");
1262 return -1;
1263 }
1264 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1265
1266 /* driver control speed/duplex */
1267 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1268 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1269
1270 /* clk switch setting */
1271 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1272 switch (hw->nic_type) {
1273 case athr_l2c_b:
1274 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1275 SERDES_MAC_CLK_SLOWDOWN);
1276 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1277 break;
1278 case athr_l2c_b2:
1279 case athr_l1d_2:
1280 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1281 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1282 break;
1283 default:
1284 break;
1285 }
1286
1287 return 0;
1288 }
1289
1290 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1291 {
1292 u16 ctrl_flags = hw->ctrl_flags;
1293
1294 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1295 atl1c_set_aspm(hw, SPEED_0);
1296 hw->ctrl_flags = ctrl_flags;
1297 }
1298
1299 /*
1300 * Set ASPM state.
1301 * Enable/disable L0s/L1 depend on link state.
1302 */
1303 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1304 {
1305 u32 pm_ctrl_data;
1306 u32 link_l1_timer;
1307
1308 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1309 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1310 PM_CTRL_ASPM_L0S_EN |
1311 PM_CTRL_MAC_ASPM_CHK);
1312 /* L1 timer */
1313 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1314 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1315 link_l1_timer =
1316 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1317 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1318 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1319 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1320 } else {
1321 link_l1_timer = hw->nic_type == athr_l2c_b ?
1322 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1323 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1324 link_l1_timer = 1;
1325 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1326 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1327 }
1328
1329 /* L0S/L1 enable */
1330 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1331 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1332 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1333 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1334
1335 /* l2cb & l1d & l2cb2 & l1d2 */
1336 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1337 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1338 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1339 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1340 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1341 PM_CTRL_SERDES_PD_EX_L1 |
1342 PM_CTRL_CLK_SWH_L1;
1343 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1344 PM_CTRL_SERDES_PLL_L1_EN |
1345 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1346 PM_CTRL_SA_DLY_EN |
1347 PM_CTRL_HOTRST);
1348 /* disable l0s if link down or l2cb */
1349 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1350 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1351 } else { /* l1c */
1352 pm_ctrl_data =
1353 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1354 if (link_speed != SPEED_0) {
1355 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1356 PM_CTRL_SERDES_PLL_L1_EN |
1357 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1358 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1359 PM_CTRL_CLK_SWH_L1 |
1360 PM_CTRL_ASPM_L0S_EN |
1361 PM_CTRL_ASPM_L1_EN);
1362 } else { /* link down */
1363 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1364 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1365 PM_CTRL_SERDES_PLL_L1_EN |
1366 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1367 PM_CTRL_ASPM_L0S_EN);
1368 }
1369 }
1370 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1371
1372 return;
1373 }
1374
1375 /**
1376 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1377 * @adapter: board private structure
1378 *
1379 * Configure the Tx /Rx unit of the MAC after a reset.
1380 */
1381 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1382 {
1383 struct atl1c_hw *hw = &adapter->hw;
1384 u32 master_ctrl_data = 0;
1385 u32 intr_modrt_data;
1386 u32 data;
1387
1388 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1389 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1390 MASTER_CTRL_RX_ITIMER_EN |
1391 MASTER_CTRL_INT_RDCLR);
1392 /* clear interrupt status */
1393 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1394 /* Clear any WOL status */
1395 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1396 /* set Interrupt Clear Timer
1397 * HW will enable self to assert interrupt event to system after
1398 * waiting x-time for software to notify it accept interrupt.
1399 */
1400
1401 data = CLK_GATING_EN_ALL;
1402 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1403 if (hw->nic_type == athr_l2c_b)
1404 data &= ~CLK_GATING_RXMAC_EN;
1405 } else
1406 data = 0;
1407 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1408
1409 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1410 hw->ict & INT_RETRIG_TIMER_MASK);
1411
1412 atl1c_configure_des_ring(adapter);
1413
1414 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1415 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1416 IRQ_MODRT_TX_TIMER_SHIFT;
1417 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1418 IRQ_MODRT_RX_TIMER_SHIFT;
1419 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1420 master_ctrl_data |=
1421 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1422 }
1423
1424 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1425 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1426
1427 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1428 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1429
1430 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1431 hw->smb_timer & SMB_STAT_TIMER_MASK);
1432
1433 /* set MTU */
1434 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1435 VLAN_HLEN + ETH_FCS_LEN);
1436
1437 atl1c_configure_tx(adapter);
1438 atl1c_configure_rx(adapter);
1439 atl1c_configure_dma(adapter);
1440
1441 return 0;
1442 }
1443
1444 static int atl1c_configure(struct atl1c_adapter *adapter)
1445 {
1446 struct net_device *netdev = adapter->netdev;
1447 int num;
1448
1449 atl1c_init_ring_ptrs(adapter);
1450 atl1c_set_multi(netdev);
1451 atl1c_restore_vlan(adapter);
1452
1453 num = atl1c_alloc_rx_buffer(adapter);
1454 if (unlikely(num == 0))
1455 return -ENOMEM;
1456
1457 if (atl1c_configure_mac(adapter))
1458 return -EIO;
1459
1460 return 0;
1461 }
1462
1463 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1464 {
1465 u16 hw_reg_addr = 0;
1466 unsigned long *stats_item = NULL;
1467 u32 data;
1468
1469 /* update rx status */
1470 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1471 stats_item = &adapter->hw_stats.rx_ok;
1472 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1473 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1474 *stats_item += data;
1475 stats_item++;
1476 hw_reg_addr += 4;
1477 }
1478 /* update tx status */
1479 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1480 stats_item = &adapter->hw_stats.tx_ok;
1481 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1482 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1483 *stats_item += data;
1484 stats_item++;
1485 hw_reg_addr += 4;
1486 }
1487 }
1488
1489 /**
1490 * atl1c_get_stats - Get System Network Statistics
1491 * @netdev: network interface device structure
1492 *
1493 * Returns the address of the device statistics structure.
1494 * The statistics are actually updated from the timer callback.
1495 */
1496 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1497 {
1498 struct atl1c_adapter *adapter = netdev_priv(netdev);
1499 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1500 struct net_device_stats *net_stats = &netdev->stats;
1501
1502 atl1c_update_hw_stats(adapter);
1503 net_stats->rx_packets = hw_stats->rx_ok;
1504 net_stats->tx_packets = hw_stats->tx_ok;
1505 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1506 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1507 net_stats->multicast = hw_stats->rx_mcast;
1508 net_stats->collisions = hw_stats->tx_1_col +
1509 hw_stats->tx_2_col * 2 +
1510 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1511 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1512 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1513 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1514 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1515 net_stats->rx_length_errors = hw_stats->rx_len_err;
1516 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1517 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1518 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1519
1520 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1521
1522 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1523 hw_stats->tx_underrun + hw_stats->tx_trunc;
1524 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1525 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1526 net_stats->tx_window_errors = hw_stats->tx_late_col;
1527
1528 return net_stats;
1529 }
1530
1531 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1532 {
1533 u16 phy_data;
1534
1535 spin_lock(&adapter->mdio_lock);
1536 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1537 spin_unlock(&adapter->mdio_lock);
1538 }
1539
1540 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1541 enum atl1c_trans_queue type)
1542 {
1543 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1544 struct atl1c_buffer *buffer_info;
1545 struct pci_dev *pdev = adapter->pdev;
1546 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1547 u16 hw_next_to_clean;
1548 u16 reg;
1549
1550 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1551
1552 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1553
1554 while (next_to_clean != hw_next_to_clean) {
1555 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1556 atl1c_clean_buffer(pdev, buffer_info, 1);
1557 if (++next_to_clean == tpd_ring->count)
1558 next_to_clean = 0;
1559 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1560 }
1561
1562 if (netif_queue_stopped(adapter->netdev) &&
1563 netif_carrier_ok(adapter->netdev)) {
1564 netif_wake_queue(adapter->netdev);
1565 }
1566
1567 return true;
1568 }
1569
1570 /**
1571 * atl1c_intr - Interrupt Handler
1572 * @irq: interrupt number
1573 * @data: pointer to a network interface device structure
1574 */
1575 static irqreturn_t atl1c_intr(int irq, void *data)
1576 {
1577 struct net_device *netdev = data;
1578 struct atl1c_adapter *adapter = netdev_priv(netdev);
1579 struct pci_dev *pdev = adapter->pdev;
1580 struct atl1c_hw *hw = &adapter->hw;
1581 int max_ints = AT_MAX_INT_WORK;
1582 int handled = IRQ_NONE;
1583 u32 status;
1584 u32 reg_data;
1585
1586 do {
1587 AT_READ_REG(hw, REG_ISR, &reg_data);
1588 status = reg_data & hw->intr_mask;
1589
1590 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1591 if (max_ints != AT_MAX_INT_WORK)
1592 handled = IRQ_HANDLED;
1593 break;
1594 }
1595 /* link event */
1596 if (status & ISR_GPHY)
1597 atl1c_clear_phy_int(adapter);
1598 /* Ack ISR */
1599 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1600 if (status & ISR_RX_PKT) {
1601 if (likely(napi_schedule_prep(&adapter->napi))) {
1602 hw->intr_mask &= ~ISR_RX_PKT;
1603 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1604 __napi_schedule(&adapter->napi);
1605 }
1606 }
1607 if (status & ISR_TX_PKT)
1608 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1609
1610 handled = IRQ_HANDLED;
1611 /* check if PCIE PHY Link down */
1612 if (status & ISR_ERROR) {
1613 if (netif_msg_hw(adapter))
1614 dev_err(&pdev->dev,
1615 "atl1c hardware error (status = 0x%x)\n",
1616 status & ISR_ERROR);
1617 /* reset MAC */
1618 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1619 schedule_work(&adapter->common_task);
1620 return IRQ_HANDLED;
1621 }
1622
1623 if (status & ISR_OVER)
1624 if (netif_msg_intr(adapter))
1625 dev_warn(&pdev->dev,
1626 "TX/RX overflow (status = 0x%x)\n",
1627 status & ISR_OVER);
1628
1629 /* link event */
1630 if (status & (ISR_GPHY | ISR_MANUAL)) {
1631 netdev->stats.tx_carrier_errors++;
1632 atl1c_link_chg_event(adapter);
1633 break;
1634 }
1635
1636 } while (--max_ints > 0);
1637 /* re-enable Interrupt*/
1638 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1639 return handled;
1640 }
1641
1642 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1643 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1644 {
1645 /*
1646 * The pid field in RRS in not correct sometimes, so we
1647 * cannot figure out if the packet is fragmented or not,
1648 * so we tell the KERNEL CHECKSUM_NONE
1649 */
1650 skb_checksum_none_assert(skb);
1651 }
1652
1653 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1654 {
1655 struct sk_buff *skb;
1656 struct page *page;
1657
1658 if (adapter->rx_frag_size > PAGE_SIZE)
1659 return netdev_alloc_skb(adapter->netdev,
1660 adapter->rx_buffer_len);
1661
1662 page = adapter->rx_page;
1663 if (!page) {
1664 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1665 if (unlikely(!page))
1666 return NULL;
1667 adapter->rx_page_offset = 0;
1668 }
1669
1670 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1671 adapter->rx_frag_size);
1672 if (likely(skb)) {
1673 adapter->rx_page_offset += adapter->rx_frag_size;
1674 if (adapter->rx_page_offset >= PAGE_SIZE)
1675 adapter->rx_page = NULL;
1676 else
1677 get_page(page);
1678 }
1679 return skb;
1680 }
1681
1682 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1683 {
1684 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1685 struct pci_dev *pdev = adapter->pdev;
1686 struct atl1c_buffer *buffer_info, *next_info;
1687 struct sk_buff *skb;
1688 void *vir_addr = NULL;
1689 u16 num_alloc = 0;
1690 u16 rfd_next_to_use, next_next;
1691 struct atl1c_rx_free_desc *rfd_desc;
1692 dma_addr_t mapping;
1693
1694 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1695 if (++next_next == rfd_ring->count)
1696 next_next = 0;
1697 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1698 next_info = &rfd_ring->buffer_info[next_next];
1699
1700 while (next_info->flags & ATL1C_BUFFER_FREE) {
1701 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1702
1703 skb = atl1c_alloc_skb(adapter);
1704 if (unlikely(!skb)) {
1705 if (netif_msg_rx_err(adapter))
1706 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1707 break;
1708 }
1709
1710 /*
1711 * Make buffer alignment 2 beyond a 16 byte boundary
1712 * this will result in a 16 byte aligned IP header after
1713 * the 14 byte MAC header is removed
1714 */
1715 vir_addr = skb->data;
1716 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1717 buffer_info->skb = skb;
1718 buffer_info->length = adapter->rx_buffer_len;
1719 mapping = pci_map_single(pdev, vir_addr,
1720 buffer_info->length,
1721 PCI_DMA_FROMDEVICE);
1722 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1723 dev_kfree_skb(skb);
1724 buffer_info->skb = NULL;
1725 buffer_info->length = 0;
1726 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1727 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1728 break;
1729 }
1730 buffer_info->dma = mapping;
1731 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1732 ATL1C_PCIMAP_FROMDEVICE);
1733 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1734 rfd_next_to_use = next_next;
1735 if (++next_next == rfd_ring->count)
1736 next_next = 0;
1737 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1738 next_info = &rfd_ring->buffer_info[next_next];
1739 num_alloc++;
1740 }
1741
1742 if (num_alloc) {
1743 /* TODO: update mailbox here */
1744 wmb();
1745 rfd_ring->next_to_use = rfd_next_to_use;
1746 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1747 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1748 }
1749
1750 return num_alloc;
1751 }
1752
1753 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1754 struct atl1c_recv_ret_status *rrs, u16 num)
1755 {
1756 u16 i;
1757 /* the relationship between rrd and rfd is one map one */
1758 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1759 rrd_ring->next_to_clean)) {
1760 rrs->word3 &= ~RRS_RXD_UPDATED;
1761 if (++rrd_ring->next_to_clean == rrd_ring->count)
1762 rrd_ring->next_to_clean = 0;
1763 }
1764 }
1765
1766 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1767 struct atl1c_recv_ret_status *rrs, u16 num)
1768 {
1769 u16 i;
1770 u16 rfd_index;
1771 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1772
1773 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1774 RRS_RX_RFD_INDEX_MASK;
1775 for (i = 0; i < num; i++) {
1776 buffer_info[rfd_index].skb = NULL;
1777 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1778 ATL1C_BUFFER_FREE);
1779 if (++rfd_index == rfd_ring->count)
1780 rfd_index = 0;
1781 }
1782 rfd_ring->next_to_clean = rfd_index;
1783 }
1784
1785 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1786 int *work_done, int work_to_do)
1787 {
1788 u16 rfd_num, rfd_index;
1789 u16 count = 0;
1790 u16 length;
1791 struct pci_dev *pdev = adapter->pdev;
1792 struct net_device *netdev = adapter->netdev;
1793 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1794 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1795 struct sk_buff *skb;
1796 struct atl1c_recv_ret_status *rrs;
1797 struct atl1c_buffer *buffer_info;
1798
1799 while (1) {
1800 if (*work_done >= work_to_do)
1801 break;
1802 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1803 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1804 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1805 RRS_RX_RFD_CNT_MASK;
1806 if (unlikely(rfd_num != 1))
1807 /* TODO support mul rfd*/
1808 if (netif_msg_rx_err(adapter))
1809 dev_warn(&pdev->dev,
1810 "Multi rfd not support yet!\n");
1811 goto rrs_checked;
1812 } else {
1813 break;
1814 }
1815 rrs_checked:
1816 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1817 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1818 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1819 if (netif_msg_rx_err(adapter))
1820 dev_warn(&pdev->dev,
1821 "wrong packet! rrs word3 is %x\n",
1822 rrs->word3);
1823 continue;
1824 }
1825
1826 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1827 RRS_PKT_SIZE_MASK);
1828 /* Good Receive */
1829 if (likely(rfd_num == 1)) {
1830 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1831 RRS_RX_RFD_INDEX_MASK;
1832 buffer_info = &rfd_ring->buffer_info[rfd_index];
1833 pci_unmap_single(pdev, buffer_info->dma,
1834 buffer_info->length, PCI_DMA_FROMDEVICE);
1835 skb = buffer_info->skb;
1836 } else {
1837 /* TODO */
1838 if (netif_msg_rx_err(adapter))
1839 dev_warn(&pdev->dev,
1840 "Multi rfd not support yet!\n");
1841 break;
1842 }
1843 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1844 skb_put(skb, length - ETH_FCS_LEN);
1845 skb->protocol = eth_type_trans(skb, netdev);
1846 atl1c_rx_checksum(adapter, skb, rrs);
1847 if (rrs->word3 & RRS_VLAN_INS) {
1848 u16 vlan;
1849
1850 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1851 vlan = le16_to_cpu(vlan);
1852 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1853 }
1854 netif_receive_skb(skb);
1855
1856 (*work_done)++;
1857 count++;
1858 }
1859 if (count)
1860 atl1c_alloc_rx_buffer(adapter);
1861 }
1862
1863 /**
1864 * atl1c_clean - NAPI Rx polling callback
1865 */
1866 static int atl1c_clean(struct napi_struct *napi, int budget)
1867 {
1868 struct atl1c_adapter *adapter =
1869 container_of(napi, struct atl1c_adapter, napi);
1870 int work_done = 0;
1871
1872 /* Keep link state information with original netdev */
1873 if (!netif_carrier_ok(adapter->netdev))
1874 goto quit_polling;
1875 /* just enable one RXQ */
1876 atl1c_clean_rx_irq(adapter, &work_done, budget);
1877
1878 if (work_done < budget) {
1879 quit_polling:
1880 napi_complete(napi);
1881 adapter->hw.intr_mask |= ISR_RX_PKT;
1882 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1883 }
1884 return work_done;
1885 }
1886
1887 #ifdef CONFIG_NET_POLL_CONTROLLER
1888
1889 /*
1890 * Polling 'interrupt' - used by things like netconsole to send skbs
1891 * without having to re-enable interrupts. It's not called while
1892 * the interrupt routine is executing.
1893 */
1894 static void atl1c_netpoll(struct net_device *netdev)
1895 {
1896 struct atl1c_adapter *adapter = netdev_priv(netdev);
1897
1898 disable_irq(adapter->pdev->irq);
1899 atl1c_intr(adapter->pdev->irq, netdev);
1900 enable_irq(adapter->pdev->irq);
1901 }
1902 #endif
1903
1904 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1905 {
1906 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1907 u16 next_to_use = 0;
1908 u16 next_to_clean = 0;
1909
1910 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1911 next_to_use = tpd_ring->next_to_use;
1912
1913 return (u16)(next_to_clean > next_to_use) ?
1914 (next_to_clean - next_to_use - 1) :
1915 (tpd_ring->count + next_to_clean - next_to_use - 1);
1916 }
1917
1918 /*
1919 * get next usable tpd
1920 * Note: should call atl1c_tdp_avail to make sure
1921 * there is enough tpd to use
1922 */
1923 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1924 enum atl1c_trans_queue type)
1925 {
1926 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1927 struct atl1c_tpd_desc *tpd_desc;
1928 u16 next_to_use = 0;
1929
1930 next_to_use = tpd_ring->next_to_use;
1931 if (++tpd_ring->next_to_use == tpd_ring->count)
1932 tpd_ring->next_to_use = 0;
1933 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1934 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1935 return tpd_desc;
1936 }
1937
1938 static struct atl1c_buffer *
1939 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1940 {
1941 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1942
1943 return &tpd_ring->buffer_info[tpd -
1944 (struct atl1c_tpd_desc *)tpd_ring->desc];
1945 }
1946
1947 /* Calculate the transmit packet descript needed*/
1948 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1949 {
1950 u16 tpd_req;
1951 u16 proto_hdr_len = 0;
1952
1953 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1954
1955 if (skb_is_gso(skb)) {
1956 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1957 if (proto_hdr_len < skb_headlen(skb))
1958 tpd_req++;
1959 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1960 tpd_req++;
1961 }
1962 return tpd_req;
1963 }
1964
1965 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1966 struct sk_buff *skb,
1967 struct atl1c_tpd_desc **tpd,
1968 enum atl1c_trans_queue type)
1969 {
1970 struct pci_dev *pdev = adapter->pdev;
1971 u8 hdr_len;
1972 u32 real_len;
1973 unsigned short offload_type;
1974 int err;
1975
1976 if (skb_is_gso(skb)) {
1977 if (skb_header_cloned(skb)) {
1978 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1979 if (unlikely(err))
1980 return -1;
1981 }
1982 offload_type = skb_shinfo(skb)->gso_type;
1983
1984 if (offload_type & SKB_GSO_TCPV4) {
1985 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1986 + ntohs(ip_hdr(skb)->tot_len));
1987
1988 if (real_len < skb->len)
1989 pskb_trim(skb, real_len);
1990
1991 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1992 if (unlikely(skb->len == hdr_len)) {
1993 /* only xsum need */
1994 if (netif_msg_tx_queued(adapter))
1995 dev_warn(&pdev->dev,
1996 "IPV4 tso with zero data??\n");
1997 goto check_sum;
1998 } else {
1999 ip_hdr(skb)->check = 0;
2000 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2001 ip_hdr(skb)->saddr,
2002 ip_hdr(skb)->daddr,
2003 0, IPPROTO_TCP, 0);
2004 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2005 }
2006 }
2007
2008 if (offload_type & SKB_GSO_TCPV6) {
2009 struct atl1c_tpd_ext_desc *etpd =
2010 *(struct atl1c_tpd_ext_desc **)(tpd);
2011
2012 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2013 *tpd = atl1c_get_tpd(adapter, type);
2014 ipv6_hdr(skb)->payload_len = 0;
2015 /* check payload == 0 byte ? */
2016 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2017 if (unlikely(skb->len == hdr_len)) {
2018 /* only xsum need */
2019 if (netif_msg_tx_queued(adapter))
2020 dev_warn(&pdev->dev,
2021 "IPV6 tso with zero data??\n");
2022 goto check_sum;
2023 } else
2024 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2025 &ipv6_hdr(skb)->saddr,
2026 &ipv6_hdr(skb)->daddr,
2027 0, IPPROTO_TCP, 0);
2028 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2029 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2030 etpd->pkt_len = cpu_to_le32(skb->len);
2031 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2032 }
2033
2034 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2035 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2036 TPD_TCPHDR_OFFSET_SHIFT;
2037 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2038 TPD_MSS_SHIFT;
2039 return 0;
2040 }
2041
2042 check_sum:
2043 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2044 u8 css, cso;
2045 cso = skb_checksum_start_offset(skb);
2046
2047 if (unlikely(cso & 0x1)) {
2048 if (netif_msg_tx_err(adapter))
2049 dev_err(&adapter->pdev->dev,
2050 "payload offset should not an event number\n");
2051 return -1;
2052 } else {
2053 css = cso + skb->csum_offset;
2054
2055 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2056 TPD_PLOADOFFSET_SHIFT;
2057 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2058 TPD_CCSUM_OFFSET_SHIFT;
2059 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2060 }
2061 }
2062 return 0;
2063 }
2064
2065 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2066 struct atl1c_tpd_desc *first_tpd,
2067 enum atl1c_trans_queue type)
2068 {
2069 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2070 struct atl1c_buffer *buffer_info;
2071 struct atl1c_tpd_desc *tpd;
2072 u16 first_index, index;
2073
2074 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2075 index = first_index;
2076 while (index != tpd_ring->next_to_use) {
2077 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2078 buffer_info = &tpd_ring->buffer_info[index];
2079 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2080 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2081 if (++index == tpd_ring->count)
2082 index = 0;
2083 }
2084 tpd_ring->next_to_use = first_index;
2085 }
2086
2087 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2088 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2089 enum atl1c_trans_queue type)
2090 {
2091 struct atl1c_tpd_desc *use_tpd = NULL;
2092 struct atl1c_buffer *buffer_info = NULL;
2093 u16 buf_len = skb_headlen(skb);
2094 u16 map_len = 0;
2095 u16 mapped_len = 0;
2096 u16 hdr_len = 0;
2097 u16 nr_frags;
2098 u16 f;
2099 int tso;
2100
2101 nr_frags = skb_shinfo(skb)->nr_frags;
2102 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2103 if (tso) {
2104 /* TSO */
2105 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2106 use_tpd = tpd;
2107
2108 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2109 buffer_info->length = map_len;
2110 buffer_info->dma = pci_map_single(adapter->pdev,
2111 skb->data, hdr_len, PCI_DMA_TODEVICE);
2112 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2113 buffer_info->dma)))
2114 goto err_dma;
2115 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2116 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2117 ATL1C_PCIMAP_TODEVICE);
2118 mapped_len += map_len;
2119 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2120 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2121 }
2122
2123 if (mapped_len < buf_len) {
2124 /* mapped_len == 0, means we should use the first tpd,
2125 which is given by caller */
2126 if (mapped_len == 0)
2127 use_tpd = tpd;
2128 else {
2129 use_tpd = atl1c_get_tpd(adapter, type);
2130 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2131 }
2132 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2133 buffer_info->length = buf_len - mapped_len;
2134 buffer_info->dma =
2135 pci_map_single(adapter->pdev, skb->data + mapped_len,
2136 buffer_info->length, PCI_DMA_TODEVICE);
2137 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2138 buffer_info->dma)))
2139 goto err_dma;
2140
2141 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2142 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2143 ATL1C_PCIMAP_TODEVICE);
2144 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2145 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2146 }
2147
2148 for (f = 0; f < nr_frags; f++) {
2149 struct skb_frag_struct *frag;
2150
2151 frag = &skb_shinfo(skb)->frags[f];
2152
2153 use_tpd = atl1c_get_tpd(adapter, type);
2154 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2155
2156 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2157 buffer_info->length = skb_frag_size(frag);
2158 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2159 frag, 0,
2160 buffer_info->length,
2161 DMA_TO_DEVICE);
2162 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2163 goto err_dma;
2164
2165 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2166 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2167 ATL1C_PCIMAP_TODEVICE);
2168 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2169 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2170 }
2171
2172 /* The last tpd */
2173 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2174 /* The last buffer info contain the skb address,
2175 so it will be free after unmap */
2176 buffer_info->skb = skb;
2177
2178 return 0;
2179
2180 err_dma:
2181 buffer_info->dma = 0;
2182 buffer_info->length = 0;
2183 return -1;
2184 }
2185
2186 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2187 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2188 {
2189 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2190 u16 reg;
2191
2192 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2193 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2194 }
2195
2196 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2197 struct net_device *netdev)
2198 {
2199 struct atl1c_adapter *adapter = netdev_priv(netdev);
2200 unsigned long flags;
2201 u16 tpd_req = 1;
2202 struct atl1c_tpd_desc *tpd;
2203 enum atl1c_trans_queue type = atl1c_trans_normal;
2204
2205 if (test_bit(__AT_DOWN, &adapter->flags)) {
2206 dev_kfree_skb_any(skb);
2207 return NETDEV_TX_OK;
2208 }
2209
2210 tpd_req = atl1c_cal_tpd_req(skb);
2211 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2212 if (netif_msg_pktdata(adapter))
2213 dev_info(&adapter->pdev->dev, "tx locked\n");
2214 return NETDEV_TX_LOCKED;
2215 }
2216
2217 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2218 /* no enough descriptor, just stop queue */
2219 netif_stop_queue(netdev);
2220 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2221 return NETDEV_TX_BUSY;
2222 }
2223
2224 tpd = atl1c_get_tpd(adapter, type);
2225
2226 /* do TSO and check sum */
2227 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2228 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2229 dev_kfree_skb_any(skb);
2230 return NETDEV_TX_OK;
2231 }
2232
2233 if (unlikely(vlan_tx_tag_present(skb))) {
2234 u16 vlan = vlan_tx_tag_get(skb);
2235 __le16 tag;
2236
2237 vlan = cpu_to_le16(vlan);
2238 AT_VLAN_TO_TAG(vlan, tag);
2239 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2240 tpd->vlan_tag = tag;
2241 }
2242
2243 if (skb_network_offset(skb) != ETH_HLEN)
2244 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2245
2246 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2247 netif_info(adapter, tx_done, adapter->netdev,
2248 "tx-skb droppted due to dma error\n");
2249 /* roll back tpd/buffer */
2250 atl1c_tx_rollback(adapter, tpd, type);
2251 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2252 dev_kfree_skb(skb);
2253 } else {
2254 atl1c_tx_queue(adapter, skb, tpd, type);
2255 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2256 }
2257
2258 return NETDEV_TX_OK;
2259 }
2260
2261 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2262 {
2263 struct net_device *netdev = adapter->netdev;
2264
2265 free_irq(adapter->pdev->irq, netdev);
2266
2267 if (adapter->have_msi)
2268 pci_disable_msi(adapter->pdev);
2269 }
2270
2271 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2272 {
2273 struct pci_dev *pdev = adapter->pdev;
2274 struct net_device *netdev = adapter->netdev;
2275 int flags = 0;
2276 int err = 0;
2277
2278 adapter->have_msi = true;
2279 err = pci_enable_msi(adapter->pdev);
2280 if (err) {
2281 if (netif_msg_ifup(adapter))
2282 dev_err(&pdev->dev,
2283 "Unable to allocate MSI interrupt Error: %d\n",
2284 err);
2285 adapter->have_msi = false;
2286 }
2287
2288 if (!adapter->have_msi)
2289 flags |= IRQF_SHARED;
2290 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2291 netdev->name, netdev);
2292 if (err) {
2293 if (netif_msg_ifup(adapter))
2294 dev_err(&pdev->dev,
2295 "Unable to allocate interrupt Error: %d\n",
2296 err);
2297 if (adapter->have_msi)
2298 pci_disable_msi(adapter->pdev);
2299 return err;
2300 }
2301 if (netif_msg_ifup(adapter))
2302 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2303 return err;
2304 }
2305
2306
2307 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2308 {
2309 /* release tx-pending skbs and reset tx/rx ring index */
2310 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2311 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2312 atl1c_clean_rx_ring(adapter);
2313 }
2314
2315 static int atl1c_up(struct atl1c_adapter *adapter)
2316 {
2317 struct net_device *netdev = adapter->netdev;
2318 int err;
2319
2320 netif_carrier_off(netdev);
2321
2322 err = atl1c_configure(adapter);
2323 if (unlikely(err))
2324 goto err_up;
2325
2326 err = atl1c_request_irq(adapter);
2327 if (unlikely(err))
2328 goto err_up;
2329
2330 atl1c_check_link_status(adapter);
2331 clear_bit(__AT_DOWN, &adapter->flags);
2332 napi_enable(&adapter->napi);
2333 atl1c_irq_enable(adapter);
2334 netif_start_queue(netdev);
2335 return err;
2336
2337 err_up:
2338 atl1c_clean_rx_ring(adapter);
2339 return err;
2340 }
2341
2342 static void atl1c_down(struct atl1c_adapter *adapter)
2343 {
2344 struct net_device *netdev = adapter->netdev;
2345
2346 atl1c_del_timer(adapter);
2347 adapter->work_event = 0; /* clear all event */
2348 /* signal that we're down so the interrupt handler does not
2349 * reschedule our watchdog timer */
2350 set_bit(__AT_DOWN, &adapter->flags);
2351 netif_carrier_off(netdev);
2352 napi_disable(&adapter->napi);
2353 atl1c_irq_disable(adapter);
2354 atl1c_free_irq(adapter);
2355 /* disable ASPM if device inactive */
2356 atl1c_disable_l0s_l1(&adapter->hw);
2357 /* reset MAC to disable all RX/TX */
2358 atl1c_reset_mac(&adapter->hw);
2359 msleep(1);
2360
2361 adapter->link_speed = SPEED_0;
2362 adapter->link_duplex = -1;
2363 atl1c_reset_dma_ring(adapter);
2364 }
2365
2366 /**
2367 * atl1c_open - Called when a network interface is made active
2368 * @netdev: network interface device structure
2369 *
2370 * Returns 0 on success, negative value on failure
2371 *
2372 * The open entry point is called when a network interface is made
2373 * active by the system (IFF_UP). At this point all resources needed
2374 * for transmit and receive operations are allocated, the interrupt
2375 * handler is registered with the OS, the watchdog timer is started,
2376 * and the stack is notified that the interface is ready.
2377 */
2378 static int atl1c_open(struct net_device *netdev)
2379 {
2380 struct atl1c_adapter *adapter = netdev_priv(netdev);
2381 int err;
2382
2383 /* disallow open during test */
2384 if (test_bit(__AT_TESTING, &adapter->flags))
2385 return -EBUSY;
2386
2387 /* allocate rx/tx dma buffer & descriptors */
2388 err = atl1c_setup_ring_resources(adapter);
2389 if (unlikely(err))
2390 return err;
2391
2392 err = atl1c_up(adapter);
2393 if (unlikely(err))
2394 goto err_up;
2395
2396 return 0;
2397
2398 err_up:
2399 atl1c_free_irq(adapter);
2400 atl1c_free_ring_resources(adapter);
2401 atl1c_reset_mac(&adapter->hw);
2402 return err;
2403 }
2404
2405 /**
2406 * atl1c_close - Disables a network interface
2407 * @netdev: network interface device structure
2408 *
2409 * Returns 0, this is not allowed to fail
2410 *
2411 * The close entry point is called when an interface is de-activated
2412 * by the OS. The hardware is still under the drivers control, but
2413 * needs to be disabled. A global MAC reset is issued to stop the
2414 * hardware, and all transmit and receive resources are freed.
2415 */
2416 static int atl1c_close(struct net_device *netdev)
2417 {
2418 struct atl1c_adapter *adapter = netdev_priv(netdev);
2419
2420 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2421 set_bit(__AT_DOWN, &adapter->flags);
2422 cancel_work_sync(&adapter->common_task);
2423 atl1c_down(adapter);
2424 atl1c_free_ring_resources(adapter);
2425 return 0;
2426 }
2427
2428 static int atl1c_suspend(struct device *dev)
2429 {
2430 struct pci_dev *pdev = to_pci_dev(dev);
2431 struct net_device *netdev = pci_get_drvdata(pdev);
2432 struct atl1c_adapter *adapter = netdev_priv(netdev);
2433 struct atl1c_hw *hw = &adapter->hw;
2434 u32 wufc = adapter->wol;
2435
2436 atl1c_disable_l0s_l1(hw);
2437 if (netif_running(netdev)) {
2438 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2439 atl1c_down(adapter);
2440 }
2441 netif_device_detach(netdev);
2442
2443 if (wufc)
2444 if (atl1c_phy_to_ps_link(hw) != 0)
2445 dev_dbg(&pdev->dev, "phy power saving failed");
2446
2447 atl1c_power_saving(hw, wufc);
2448
2449 return 0;
2450 }
2451
2452 #ifdef CONFIG_PM_SLEEP
2453 static int atl1c_resume(struct device *dev)
2454 {
2455 struct pci_dev *pdev = to_pci_dev(dev);
2456 struct net_device *netdev = pci_get_drvdata(pdev);
2457 struct atl1c_adapter *adapter = netdev_priv(netdev);
2458
2459 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2460 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2461
2462 atl1c_phy_reset(&adapter->hw);
2463 atl1c_reset_mac(&adapter->hw);
2464 atl1c_phy_init(&adapter->hw);
2465
2466 #if 0
2467 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2468 pm_data &= ~PM_CTRLSTAT_PME_EN;
2469 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2470 #endif
2471
2472 netif_device_attach(netdev);
2473 if (netif_running(netdev))
2474 atl1c_up(adapter);
2475
2476 return 0;
2477 }
2478 #endif
2479
2480 static void atl1c_shutdown(struct pci_dev *pdev)
2481 {
2482 struct net_device *netdev = pci_get_drvdata(pdev);
2483 struct atl1c_adapter *adapter = netdev_priv(netdev);
2484
2485 atl1c_suspend(&pdev->dev);
2486 pci_wake_from_d3(pdev, adapter->wol);
2487 pci_set_power_state(pdev, PCI_D3hot);
2488 }
2489
2490 static const struct net_device_ops atl1c_netdev_ops = {
2491 .ndo_open = atl1c_open,
2492 .ndo_stop = atl1c_close,
2493 .ndo_validate_addr = eth_validate_addr,
2494 .ndo_start_xmit = atl1c_xmit_frame,
2495 .ndo_set_mac_address = atl1c_set_mac_addr,
2496 .ndo_set_rx_mode = atl1c_set_multi,
2497 .ndo_change_mtu = atl1c_change_mtu,
2498 .ndo_fix_features = atl1c_fix_features,
2499 .ndo_set_features = atl1c_set_features,
2500 .ndo_do_ioctl = atl1c_ioctl,
2501 .ndo_tx_timeout = atl1c_tx_timeout,
2502 .ndo_get_stats = atl1c_get_stats,
2503 #ifdef CONFIG_NET_POLL_CONTROLLER
2504 .ndo_poll_controller = atl1c_netpoll,
2505 #endif
2506 };
2507
2508 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2509 {
2510 SET_NETDEV_DEV(netdev, &pdev->dev);
2511 pci_set_drvdata(pdev, netdev);
2512
2513 netdev->netdev_ops = &atl1c_netdev_ops;
2514 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2515 atl1c_set_ethtool_ops(netdev);
2516
2517 /* TODO: add when ready */
2518 netdev->hw_features = NETIF_F_SG |
2519 NETIF_F_HW_CSUM |
2520 NETIF_F_HW_VLAN_CTAG_RX |
2521 NETIF_F_TSO |
2522 NETIF_F_TSO6;
2523 netdev->features = netdev->hw_features |
2524 NETIF_F_HW_VLAN_CTAG_TX;
2525 return 0;
2526 }
2527
2528 /**
2529 * atl1c_probe - Device Initialization Routine
2530 * @pdev: PCI device information struct
2531 * @ent: entry in atl1c_pci_tbl
2532 *
2533 * Returns 0 on success, negative on failure
2534 *
2535 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2536 * The OS initialization, configuring of the adapter private structure,
2537 * and a hardware reset occur.
2538 */
2539 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2540 {
2541 struct net_device *netdev;
2542 struct atl1c_adapter *adapter;
2543 static int cards_found;
2544
2545 int err = 0;
2546
2547 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2548 err = pci_enable_device_mem(pdev);
2549 if (err) {
2550 dev_err(&pdev->dev, "cannot enable PCI device\n");
2551 return err;
2552 }
2553
2554 /*
2555 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2556 * shared register for the high 32 bits, so only a single, aligned,
2557 * 4 GB physical address range can be used at a time.
2558 *
2559 * Supporting 64-bit DMA on this hardware is more trouble than it's
2560 * worth. It is far easier to limit to 32-bit DMA than update
2561 * various kernel subsystems to support the mechanics required by a
2562 * fixed-high-32-bit system.
2563 */
2564 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2565 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2566 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2567 goto err_dma;
2568 }
2569
2570 err = pci_request_regions(pdev, atl1c_driver_name);
2571 if (err) {
2572 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2573 goto err_pci_reg;
2574 }
2575
2576 pci_set_master(pdev);
2577
2578 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2579 if (netdev == NULL) {
2580 err = -ENOMEM;
2581 goto err_alloc_etherdev;
2582 }
2583
2584 err = atl1c_init_netdev(netdev, pdev);
2585 if (err) {
2586 dev_err(&pdev->dev, "init netdevice failed\n");
2587 goto err_init_netdev;
2588 }
2589 adapter = netdev_priv(netdev);
2590 adapter->bd_number = cards_found;
2591 adapter->netdev = netdev;
2592 adapter->pdev = pdev;
2593 adapter->hw.adapter = adapter;
2594 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2595 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2596 if (!adapter->hw.hw_addr) {
2597 err = -EIO;
2598 dev_err(&pdev->dev, "cannot map device registers\n");
2599 goto err_ioremap;
2600 }
2601
2602 /* init mii data */
2603 adapter->mii.dev = netdev;
2604 adapter->mii.mdio_read = atl1c_mdio_read;
2605 adapter->mii.mdio_write = atl1c_mdio_write;
2606 adapter->mii.phy_id_mask = 0x1f;
2607 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2608 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2609 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2610 (unsigned long)adapter);
2611 /* setup the private structure */
2612 err = atl1c_sw_init(adapter);
2613 if (err) {
2614 dev_err(&pdev->dev, "net device private data init failed\n");
2615 goto err_sw_init;
2616 }
2617 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2618
2619 /* Init GPHY as early as possible due to power saving issue */
2620 atl1c_phy_reset(&adapter->hw);
2621
2622 err = atl1c_reset_mac(&adapter->hw);
2623 if (err) {
2624 err = -EIO;
2625 goto err_reset;
2626 }
2627
2628 /* reset the controller to
2629 * put the device in a known good starting state */
2630 err = atl1c_phy_init(&adapter->hw);
2631 if (err) {
2632 err = -EIO;
2633 goto err_reset;
2634 }
2635 if (atl1c_read_mac_addr(&adapter->hw)) {
2636 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2637 netdev->addr_assign_type = NET_ADDR_RANDOM;
2638 }
2639 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2640 if (netif_msg_probe(adapter))
2641 dev_dbg(&pdev->dev, "mac address : %pM\n",
2642 adapter->hw.mac_addr);
2643
2644 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2645 INIT_WORK(&adapter->common_task, atl1c_common_task);
2646 adapter->work_event = 0;
2647 err = register_netdev(netdev);
2648 if (err) {
2649 dev_err(&pdev->dev, "register netdevice failed\n");
2650 goto err_register;
2651 }
2652
2653 if (netif_msg_probe(adapter))
2654 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2655 cards_found++;
2656 return 0;
2657
2658 err_reset:
2659 err_register:
2660 err_sw_init:
2661 iounmap(adapter->hw.hw_addr);
2662 err_init_netdev:
2663 err_ioremap:
2664 free_netdev(netdev);
2665 err_alloc_etherdev:
2666 pci_release_regions(pdev);
2667 err_pci_reg:
2668 err_dma:
2669 pci_disable_device(pdev);
2670 return err;
2671 }
2672
2673 /**
2674 * atl1c_remove - Device Removal Routine
2675 * @pdev: PCI device information struct
2676 *
2677 * atl1c_remove is called by the PCI subsystem to alert the driver
2678 * that it should release a PCI device. The could be caused by a
2679 * Hot-Plug event, or because the driver is going to be removed from
2680 * memory.
2681 */
2682 static void atl1c_remove(struct pci_dev *pdev)
2683 {
2684 struct net_device *netdev = pci_get_drvdata(pdev);
2685 struct atl1c_adapter *adapter = netdev_priv(netdev);
2686
2687 unregister_netdev(netdev);
2688 /* restore permanent address */
2689 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2690 atl1c_phy_disable(&adapter->hw);
2691
2692 iounmap(adapter->hw.hw_addr);
2693
2694 pci_release_regions(pdev);
2695 pci_disable_device(pdev);
2696 free_netdev(netdev);
2697 }
2698
2699 /**
2700 * atl1c_io_error_detected - called when PCI error is detected
2701 * @pdev: Pointer to PCI device
2702 * @state: The current pci connection state
2703 *
2704 * This function is called after a PCI bus error affecting
2705 * this device has been detected.
2706 */
2707 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2708 pci_channel_state_t state)
2709 {
2710 struct net_device *netdev = pci_get_drvdata(pdev);
2711 struct atl1c_adapter *adapter = netdev_priv(netdev);
2712
2713 netif_device_detach(netdev);
2714
2715 if (state == pci_channel_io_perm_failure)
2716 return PCI_ERS_RESULT_DISCONNECT;
2717
2718 if (netif_running(netdev))
2719 atl1c_down(adapter);
2720
2721 pci_disable_device(pdev);
2722
2723 /* Request a slot slot reset. */
2724 return PCI_ERS_RESULT_NEED_RESET;
2725 }
2726
2727 /**
2728 * atl1c_io_slot_reset - called after the pci bus has been reset.
2729 * @pdev: Pointer to PCI device
2730 *
2731 * Restart the card from scratch, as if from a cold-boot. Implementation
2732 * resembles the first-half of the e1000_resume routine.
2733 */
2734 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2735 {
2736 struct net_device *netdev = pci_get_drvdata(pdev);
2737 struct atl1c_adapter *adapter = netdev_priv(netdev);
2738
2739 if (pci_enable_device(pdev)) {
2740 if (netif_msg_hw(adapter))
2741 dev_err(&pdev->dev,
2742 "Cannot re-enable PCI device after reset\n");
2743 return PCI_ERS_RESULT_DISCONNECT;
2744 }
2745 pci_set_master(pdev);
2746
2747 pci_enable_wake(pdev, PCI_D3hot, 0);
2748 pci_enable_wake(pdev, PCI_D3cold, 0);
2749
2750 atl1c_reset_mac(&adapter->hw);
2751
2752 return PCI_ERS_RESULT_RECOVERED;
2753 }
2754
2755 /**
2756 * atl1c_io_resume - called when traffic can start flowing again.
2757 * @pdev: Pointer to PCI device
2758 *
2759 * This callback is called when the error recovery driver tells us that
2760 * its OK to resume normal operation. Implementation resembles the
2761 * second-half of the atl1c_resume routine.
2762 */
2763 static void atl1c_io_resume(struct pci_dev *pdev)
2764 {
2765 struct net_device *netdev = pci_get_drvdata(pdev);
2766 struct atl1c_adapter *adapter = netdev_priv(netdev);
2767
2768 if (netif_running(netdev)) {
2769 if (atl1c_up(adapter)) {
2770 if (netif_msg_hw(adapter))
2771 dev_err(&pdev->dev,
2772 "Cannot bring device back up after reset\n");
2773 return;
2774 }
2775 }
2776
2777 netif_device_attach(netdev);
2778 }
2779
2780 static const struct pci_error_handlers atl1c_err_handler = {
2781 .error_detected = atl1c_io_error_detected,
2782 .slot_reset = atl1c_io_slot_reset,
2783 .resume = atl1c_io_resume,
2784 };
2785
2786 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2787
2788 static struct pci_driver atl1c_driver = {
2789 .name = atl1c_driver_name,
2790 .id_table = atl1c_pci_tbl,
2791 .probe = atl1c_probe,
2792 .remove = atl1c_remove,
2793 .shutdown = atl1c_shutdown,
2794 .err_handler = &atl1c_err_handler,
2795 .driver.pm = &atl1c_pm_ops,
2796 };
2797
2798 module_pci_driver(atl1c_driver);
Linux kernel - Deliverables
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