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Staging: hv: mousevsc: Cleanup and properly implement reportdesc_callback()
[zen-stable.git] / drivers / net / atl1c / atl1c_main.c
blob972244218408e5db5f8a33f983d34ec5e5a82b5c
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 "1.0.1.0-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27 #define PCI_DEVICE_ID_ATTANSIC_L2C 0x1062
28 #define PCI_DEVICE_ID_ATTANSIC_L1C 0x1063
29 #define PCI_DEVICE_ID_ATHEROS_L2C_B 0x2060 /* AR8152 v1.1 Fast 10/100 */
30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2 0x2062 /* AR8152 v2.0 Fast 10/100 */
31 #define PCI_DEVICE_ID_ATHEROS_L1D 0x1073 /* AR8151 v1.0 Gigabit 1000 */
32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0 0x1083 /* AR8151 v2.0 Gigabit 1000 */
33 #define L2CB_V10 0xc0
34 #define L2CB_V11 0xc1
35
36 /*
37 * atl1c_pci_tbl - PCI Device ID Table
38 *
39 * Wildcard entries (PCI_ANY_ID) should come last
40 * Last entry must be all 0s
41 *
42 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
43 * Class, Class Mask, private data (not used) }
44 */
45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
46 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
47 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
48 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
49 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
50 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
51 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
52 /* required last entry */
53 { 0 }
54 };
55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
56
57 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
58 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(ATL1C_DRV_VERSION);
61
62 static int atl1c_stop_mac(struct atl1c_hw *hw);
63 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
64 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
65 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
66 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
67 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
68 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
69 int *work_done, int work_to_do);
70 static int atl1c_up(struct atl1c_adapter *adapter);
71 static void atl1c_down(struct atl1c_adapter *adapter);
72
73 static const u16 atl1c_pay_load_size[] = {
74 128, 256, 512, 1024, 2048, 4096,
75 };
76
77 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
78 {
79 REG_MB_RFD0_PROD_IDX,
80 REG_MB_RFD1_PROD_IDX,
81 REG_MB_RFD2_PROD_IDX,
82 REG_MB_RFD3_PROD_IDX
83 };
84
85 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
86 {
87 REG_RFD0_HEAD_ADDR_LO,
88 REG_RFD1_HEAD_ADDR_LO,
89 REG_RFD2_HEAD_ADDR_LO,
90 REG_RFD3_HEAD_ADDR_LO
91 };
92
93 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
94 {
95 REG_RRD0_HEAD_ADDR_LO,
96 REG_RRD1_HEAD_ADDR_LO,
97 REG_RRD2_HEAD_ADDR_LO,
98 REG_RRD3_HEAD_ADDR_LO
99 };
100
101 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
102 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
103 static void atl1c_pcie_patch(struct atl1c_hw *hw)
104 {
105 u32 data;
106
107 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
108 data |= PCIE_PHYMISC_FORCE_RCV_DET;
109 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
110
111 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
112 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
113
114 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
115 PCIE_PHYMISC2_SERDES_CDR_SHIFT);
116 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
117 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
118 PCIE_PHYMISC2_SERDES_TH_SHIFT);
119 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
120 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
121 }
122 }
123
124 /* FIXME: no need any more ? */
125 /*
126 * atl1c_init_pcie - init PCIE module
127 */
128 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
129 {
130 u32 data;
131 u32 pci_cmd;
132 struct pci_dev *pdev = hw->adapter->pdev;
133
134 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
135 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
136 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
137 PCI_COMMAND_IO);
138 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
139
140 /*
141 * Clear any PowerSaveing Settings
142 */
143 pci_enable_wake(pdev, PCI_D3hot, 0);
144 pci_enable_wake(pdev, PCI_D3cold, 0);
145
146 /*
147 * Mask some pcie error bits
148 */
149 AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
150 data &= ~PCIE_UC_SERVRITY_DLP;
151 data &= ~PCIE_UC_SERVRITY_FCP;
152 AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
153
154 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
155 data &= ~LTSSM_ID_EN_WRO;
156 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
157
158 atl1c_pcie_patch(hw);
159 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
160 atl1c_disable_l0s_l1(hw);
161 if (flag & ATL1C_PCIE_PHY_RESET)
162 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
163 else
164 AT_WRITE_REG(hw, REG_GPHY_CTRL,
165 GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
166
167 msleep(5);
168 }
169
170 /*
171 * atl1c_irq_enable - Enable default interrupt generation settings
172 * @adapter: board private structure
173 */
174 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
175 {
176 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
177 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
178 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
179 AT_WRITE_FLUSH(&adapter->hw);
180 }
181 }
182
183 /*
184 * atl1c_irq_disable - Mask off interrupt generation on the NIC
185 * @adapter: board private structure
186 */
187 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
188 {
189 atomic_inc(&adapter->irq_sem);
190 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
191 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
192 AT_WRITE_FLUSH(&adapter->hw);
193 synchronize_irq(adapter->pdev->irq);
194 }
195
196 /*
197 * atl1c_irq_reset - reset interrupt confiure on the NIC
198 * @adapter: board private structure
199 */
200 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
201 {
202 atomic_set(&adapter->irq_sem, 1);
203 atl1c_irq_enable(adapter);
204 }
205
206 /*
207 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
208 * of the idle status register until the device is actually idle
209 */
210 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
211 {
212 int timeout;
213 u32 data;
214
215 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
216 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
217 if ((data & IDLE_STATUS_MASK) == 0)
218 return 0;
219 msleep(1);
220 }
221 return data;
222 }
223
224 /*
225 * atl1c_phy_config - Timer Call-back
226 * @data: pointer to netdev cast into an unsigned long
227 */
228 static void atl1c_phy_config(unsigned long data)
229 {
230 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
231 struct atl1c_hw *hw = &adapter->hw;
232 unsigned long flags;
233
234 spin_lock_irqsave(&adapter->mdio_lock, flags);
235 atl1c_restart_autoneg(hw);
236 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
237 }
238
239 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
240 {
241 WARN_ON(in_interrupt());
242 atl1c_down(adapter);
243 atl1c_up(adapter);
244 clear_bit(__AT_RESETTING, &adapter->flags);
245 }
246
247 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
248 {
249 struct atl1c_hw *hw = &adapter->hw;
250 struct net_device *netdev = adapter->netdev;
251 struct pci_dev *pdev = adapter->pdev;
252 int err;
253 unsigned long flags;
254 u16 speed, duplex, phy_data;
255
256 spin_lock_irqsave(&adapter->mdio_lock, flags);
257 /* MII_BMSR must read twise */
258 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
259 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
260 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
261
262 if ((phy_data & BMSR_LSTATUS) == 0) {
263 /* link down */
264 hw->hibernate = true;
265 if (atl1c_stop_mac(hw) != 0)
266 if (netif_msg_hw(adapter))
267 dev_warn(&pdev->dev, "stop mac failed\n");
268 atl1c_set_aspm(hw, false);
269 netif_carrier_off(netdev);
270 netif_stop_queue(netdev);
271 atl1c_phy_reset(hw);
272 atl1c_phy_init(&adapter->hw);
273 } else {
274 /* Link Up */
275 hw->hibernate = false;
276 spin_lock_irqsave(&adapter->mdio_lock, flags);
277 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
278 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
279 if (unlikely(err))
280 return;
281 /* link result is our setting */
282 if (adapter->link_speed != speed ||
283 adapter->link_duplex != duplex) {
284 adapter->link_speed = speed;
285 adapter->link_duplex = duplex;
286 atl1c_set_aspm(hw, true);
287 atl1c_enable_tx_ctrl(hw);
288 atl1c_enable_rx_ctrl(hw);
289 atl1c_setup_mac_ctrl(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_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
341 netif_device_detach(netdev);
342 atl1c_down(adapter);
343 atl1c_up(adapter);
344 netif_device_attach(netdev);
345 }
346
347 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
348 &adapter->work_event))
349 atl1c_check_link_status(adapter);
350 }
351
352
353 static void atl1c_del_timer(struct atl1c_adapter *adapter)
354 {
355 del_timer_sync(&adapter->phy_config_timer);
356 }
357
358
359 /*
360 * atl1c_tx_timeout - Respond to a Tx Hang
361 * @netdev: network interface device structure
362 */
363 static void atl1c_tx_timeout(struct net_device *netdev)
364 {
365 struct atl1c_adapter *adapter = netdev_priv(netdev);
366
367 /* Do the reset outside of interrupt context */
368 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
369 schedule_work(&adapter->common_task);
370 }
371
372 /*
373 * atl1c_set_multi - Multicast and Promiscuous mode set
374 * @netdev: network interface device structure
375 *
376 * The set_multi entry point is called whenever the multicast address
377 * list or the network interface flags are updated. This routine is
378 * responsible for configuring the hardware for proper multicast,
379 * promiscuous mode, and all-multi behavior.
380 */
381 static void atl1c_set_multi(struct net_device *netdev)
382 {
383 struct atl1c_adapter *adapter = netdev_priv(netdev);
384 struct atl1c_hw *hw = &adapter->hw;
385 struct netdev_hw_addr *ha;
386 u32 mac_ctrl_data;
387 u32 hash_value;
388
389 /* Check for Promiscuous and All Multicast modes */
390 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
391
392 if (netdev->flags & IFF_PROMISC) {
393 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
394 } else if (netdev->flags & IFF_ALLMULTI) {
395 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
396 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
397 } else {
398 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
399 }
400
401 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
402
403 /* clear the old settings from the multicast hash table */
404 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
405 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
406
407 /* comoute mc addresses' hash value ,and put it into hash table */
408 netdev_for_each_mc_addr(ha, netdev) {
409 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
410 atl1c_hash_set(hw, hash_value);
411 }
412 }
413
414 static void __atl1c_vlan_mode(u32 features, u32 *mac_ctrl_data)
415 {
416 if (features & NETIF_F_HW_VLAN_RX) {
417 /* enable VLAN tag insert/strip */
418 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
419 } else {
420 /* disable VLAN tag insert/strip */
421 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
422 }
423 }
424
425 static void atl1c_vlan_mode(struct net_device *netdev, u32 features)
426 {
427 struct atl1c_adapter *adapter = netdev_priv(netdev);
428 struct pci_dev *pdev = adapter->pdev;
429 u32 mac_ctrl_data = 0;
430
431 if (netif_msg_pktdata(adapter))
432 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
433
434 atl1c_irq_disable(adapter);
435 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
436 __atl1c_vlan_mode(features, &mac_ctrl_data);
437 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
438 atl1c_irq_enable(adapter);
439 }
440
441 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
442 {
443 struct pci_dev *pdev = adapter->pdev;
444
445 if (netif_msg_pktdata(adapter))
446 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
447 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
448 }
449
450 /*
451 * atl1c_set_mac - Change the Ethernet Address of the NIC
452 * @netdev: network interface device structure
453 * @p: pointer to an address structure
454 *
455 * Returns 0 on success, negative on failure
456 */
457 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
458 {
459 struct atl1c_adapter *adapter = netdev_priv(netdev);
460 struct sockaddr *addr = p;
461
462 if (!is_valid_ether_addr(addr->sa_data))
463 return -EADDRNOTAVAIL;
464
465 if (netif_running(netdev))
466 return -EBUSY;
467
468 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
469 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
470
471 atl1c_hw_set_mac_addr(&adapter->hw);
472
473 return 0;
474 }
475
476 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
477 struct net_device *dev)
478 {
479 int mtu = dev->mtu;
480
481 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
482 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
483 }
484
485 static u32 atl1c_fix_features(struct net_device *netdev, u32 features)
486 {
487 /*
488 * Since there is no support for separate rx/tx vlan accel
489 * enable/disable make sure tx flag is always in same state as rx.
490 */
491 if (features & NETIF_F_HW_VLAN_RX)
492 features |= NETIF_F_HW_VLAN_TX;
493 else
494 features &= ~NETIF_F_HW_VLAN_TX;
495
496 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
497 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
498
499 return features;
500 }
501
502 static int atl1c_set_features(struct net_device *netdev, u32 features)
503 {
504 u32 changed = netdev->features ^ features;
505
506 if (changed & NETIF_F_HW_VLAN_RX)
507 atl1c_vlan_mode(netdev, features);
508
509 return 0;
510 }
511
512 /*
513 * atl1c_change_mtu - Change the Maximum Transfer Unit
514 * @netdev: network interface device structure
515 * @new_mtu: new value for maximum frame size
516 *
517 * Returns 0 on success, negative on failure
518 */
519 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
520 {
521 struct atl1c_adapter *adapter = netdev_priv(netdev);
522 int old_mtu = netdev->mtu;
523 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
524
525 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
526 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
527 if (netif_msg_link(adapter))
528 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
529 return -EINVAL;
530 }
531 /* set MTU */
532 if (old_mtu != new_mtu && netif_running(netdev)) {
533 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
534 msleep(1);
535 netdev->mtu = new_mtu;
536 adapter->hw.max_frame_size = new_mtu;
537 atl1c_set_rxbufsize(adapter, netdev);
538 atl1c_down(adapter);
539 netdev_update_features(netdev);
540 atl1c_up(adapter);
541 clear_bit(__AT_RESETTING, &adapter->flags);
542 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
543 u32 phy_data;
544
545 AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
546 phy_data |= 0x10000000;
547 AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
548 }
549
550 }
551 return 0;
552 }
553
554 /*
555 * caller should hold mdio_lock
556 */
557 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
558 {
559 struct atl1c_adapter *adapter = netdev_priv(netdev);
560 u16 result;
561
562 atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
563 return result;
564 }
565
566 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
567 int reg_num, int val)
568 {
569 struct atl1c_adapter *adapter = netdev_priv(netdev);
570
571 atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
572 }
573
574 /*
575 * atl1c_mii_ioctl -
576 * @netdev:
577 * @ifreq:
578 * @cmd:
579 */
580 static int atl1c_mii_ioctl(struct net_device *netdev,
581 struct ifreq *ifr, int cmd)
582 {
583 struct atl1c_adapter *adapter = netdev_priv(netdev);
584 struct pci_dev *pdev = adapter->pdev;
585 struct mii_ioctl_data *data = if_mii(ifr);
586 unsigned long flags;
587 int retval = 0;
588
589 if (!netif_running(netdev))
590 return -EINVAL;
591
592 spin_lock_irqsave(&adapter->mdio_lock, flags);
593 switch (cmd) {
594 case SIOCGMIIPHY:
595 data->phy_id = 0;
596 break;
597
598 case SIOCGMIIREG:
599 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
600 &data->val_out)) {
601 retval = -EIO;
602 goto out;
603 }
604 break;
605
606 case SIOCSMIIREG:
607 if (data->reg_num & ~(0x1F)) {
608 retval = -EFAULT;
609 goto out;
610 }
611
612 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
613 data->reg_num, data->val_in);
614 if (atl1c_write_phy_reg(&adapter->hw,
615 data->reg_num, data->val_in)) {
616 retval = -EIO;
617 goto out;
618 }
619 break;
620
621 default:
622 retval = -EOPNOTSUPP;
623 break;
624 }
625 out:
626 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
627 return retval;
628 }
629
630 /*
631 * atl1c_ioctl -
632 * @netdev:
633 * @ifreq:
634 * @cmd:
635 */
636 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
637 {
638 switch (cmd) {
639 case SIOCGMIIPHY:
640 case SIOCGMIIREG:
641 case SIOCSMIIREG:
642 return atl1c_mii_ioctl(netdev, ifr, cmd);
643 default:
644 return -EOPNOTSUPP;
645 }
646 }
647
648 /*
649 * atl1c_alloc_queues - Allocate memory for all rings
650 * @adapter: board private structure to initialize
651 *
652 */
653 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
654 {
655 return 0;
656 }
657
658 static void atl1c_set_mac_type(struct atl1c_hw *hw)
659 {
660 switch (hw->device_id) {
661 case PCI_DEVICE_ID_ATTANSIC_L2C:
662 hw->nic_type = athr_l2c;
663 break;
664 case PCI_DEVICE_ID_ATTANSIC_L1C:
665 hw->nic_type = athr_l1c;
666 break;
667 case PCI_DEVICE_ID_ATHEROS_L2C_B:
668 hw->nic_type = athr_l2c_b;
669 break;
670 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
671 hw->nic_type = athr_l2c_b2;
672 break;
673 case PCI_DEVICE_ID_ATHEROS_L1D:
674 hw->nic_type = athr_l1d;
675 break;
676 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
677 hw->nic_type = athr_l1d_2;
678 break;
679 default:
680 break;
681 }
682 }
683
684 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
685 {
686 u32 phy_status_data;
687 u32 link_ctrl_data;
688
689 atl1c_set_mac_type(hw);
690 AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
691 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
692
693 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
694 ATL1C_TXQ_MODE_ENHANCE;
695 if (link_ctrl_data & LINK_CTRL_L0S_EN)
696 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
697 if (link_ctrl_data & LINK_CTRL_L1_EN)
698 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
699 if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
700 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
701 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
702
703 if (hw->nic_type == athr_l1c ||
704 hw->nic_type == athr_l1d ||
705 hw->nic_type == athr_l1d_2)
706 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
707 return 0;
708 }
709 /*
710 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
711 * @adapter: board private structure to initialize
712 *
713 * atl1c_sw_init initializes the Adapter private data structure.
714 * Fields are initialized based on PCI device information and
715 * OS network device settings (MTU size).
716 */
717 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
718 {
719 struct atl1c_hw *hw = &adapter->hw;
720 struct pci_dev *pdev = adapter->pdev;
721 u32 revision;
722
723
724 adapter->wol = 0;
725 device_set_wakeup_enable(&pdev->dev, false);
726 adapter->link_speed = SPEED_0;
727 adapter->link_duplex = FULL_DUPLEX;
728 adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
729 adapter->tpd_ring[0].count = 1024;
730 adapter->rfd_ring[0].count = 512;
731
732 hw->vendor_id = pdev->vendor;
733 hw->device_id = pdev->device;
734 hw->subsystem_vendor_id = pdev->subsystem_vendor;
735 hw->subsystem_id = pdev->subsystem_device;
736 AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
737 hw->revision_id = revision & 0xFF;
738 /* before link up, we assume hibernate is true */
739 hw->hibernate = true;
740 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
741 if (atl1c_setup_mac_funcs(hw) != 0) {
742 dev_err(&pdev->dev, "set mac function pointers failed\n");
743 return -1;
744 }
745 hw->intr_mask = IMR_NORMAL_MASK;
746 hw->phy_configured = false;
747 hw->preamble_len = 7;
748 hw->max_frame_size = adapter->netdev->mtu;
749 if (adapter->num_rx_queues < 2) {
750 hw->rss_type = atl1c_rss_disable;
751 hw->rss_mode = atl1c_rss_mode_disable;
752 } else {
753 hw->rss_type = atl1c_rss_ipv4;
754 hw->rss_mode = atl1c_rss_mul_que_mul_int;
755 hw->rss_hash_bits = 16;
756 }
757 hw->autoneg_advertised = ADVERTISED_Autoneg;
758 hw->indirect_tab = 0xE4E4E4E4;
759 hw->base_cpu = 0;
760
761 hw->ict = 50000; /* 100ms */
762 hw->smb_timer = 200000; /* 400ms */
763 hw->cmb_tpd = 4;
764 hw->cmb_tx_timer = 1; /* 2 us */
765 hw->rx_imt = 200;
766 hw->tx_imt = 1000;
767
768 hw->tpd_burst = 5;
769 hw->rfd_burst = 8;
770 hw->dma_order = atl1c_dma_ord_out;
771 hw->dmar_block = atl1c_dma_req_1024;
772 hw->dmaw_block = atl1c_dma_req_1024;
773 hw->dmar_dly_cnt = 15;
774 hw->dmaw_dly_cnt = 4;
775
776 if (atl1c_alloc_queues(adapter)) {
777 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
778 return -ENOMEM;
779 }
780 /* TODO */
781 atl1c_set_rxbufsize(adapter, adapter->netdev);
782 atomic_set(&adapter->irq_sem, 1);
783 spin_lock_init(&adapter->mdio_lock);
784 spin_lock_init(&adapter->tx_lock);
785 set_bit(__AT_DOWN, &adapter->flags);
786
787 return 0;
788 }
789
790 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
791 struct atl1c_buffer *buffer_info, int in_irq)
792 {
793 u16 pci_driection;
794 if (buffer_info->flags & ATL1C_BUFFER_FREE)
795 return;
796 if (buffer_info->dma) {
797 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
798 pci_driection = PCI_DMA_FROMDEVICE;
799 else
800 pci_driection = PCI_DMA_TODEVICE;
801
802 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
803 pci_unmap_single(pdev, buffer_info->dma,
804 buffer_info->length, pci_driection);
805 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
806 pci_unmap_page(pdev, buffer_info->dma,
807 buffer_info->length, pci_driection);
808 }
809 if (buffer_info->skb) {
810 if (in_irq)
811 dev_kfree_skb_irq(buffer_info->skb);
812 else
813 dev_kfree_skb(buffer_info->skb);
814 }
815 buffer_info->dma = 0;
816 buffer_info->skb = NULL;
817 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
818 }
819 /*
820 * atl1c_clean_tx_ring - Free Tx-skb
821 * @adapter: board private structure
822 */
823 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
824 enum atl1c_trans_queue type)
825 {
826 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
827 struct atl1c_buffer *buffer_info;
828 struct pci_dev *pdev = adapter->pdev;
829 u16 index, ring_count;
830
831 ring_count = tpd_ring->count;
832 for (index = 0; index < ring_count; index++) {
833 buffer_info = &tpd_ring->buffer_info[index];
834 atl1c_clean_buffer(pdev, buffer_info, 0);
835 }
836
837 /* Zero out Tx-buffers */
838 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
839 ring_count);
840 atomic_set(&tpd_ring->next_to_clean, 0);
841 tpd_ring->next_to_use = 0;
842 }
843
844 /*
845 * atl1c_clean_rx_ring - Free rx-reservation skbs
846 * @adapter: board private structure
847 */
848 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
849 {
850 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
851 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
852 struct atl1c_buffer *buffer_info;
853 struct pci_dev *pdev = adapter->pdev;
854 int i, j;
855
856 for (i = 0; i < adapter->num_rx_queues; i++) {
857 for (j = 0; j < rfd_ring[i].count; j++) {
858 buffer_info = &rfd_ring[i].buffer_info[j];
859 atl1c_clean_buffer(pdev, buffer_info, 0);
860 }
861 /* zero out the descriptor ring */
862 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
863 rfd_ring[i].next_to_clean = 0;
864 rfd_ring[i].next_to_use = 0;
865 rrd_ring[i].next_to_use = 0;
866 rrd_ring[i].next_to_clean = 0;
867 }
868 }
869
870 /*
871 * Read / Write Ptr Initialize:
872 */
873 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
874 {
875 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
876 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
877 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
878 struct atl1c_buffer *buffer_info;
879 int i, j;
880
881 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
882 tpd_ring[i].next_to_use = 0;
883 atomic_set(&tpd_ring[i].next_to_clean, 0);
884 buffer_info = tpd_ring[i].buffer_info;
885 for (j = 0; j < tpd_ring->count; j++)
886 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
887 ATL1C_BUFFER_FREE);
888 }
889 for (i = 0; i < adapter->num_rx_queues; i++) {
890 rfd_ring[i].next_to_use = 0;
891 rfd_ring[i].next_to_clean = 0;
892 rrd_ring[i].next_to_use = 0;
893 rrd_ring[i].next_to_clean = 0;
894 for (j = 0; j < rfd_ring[i].count; j++) {
895 buffer_info = &rfd_ring[i].buffer_info[j];
896 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
897 }
898 }
899 }
900
901 /*
902 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
903 * @adapter: board private structure
904 *
905 * Free all transmit software resources
906 */
907 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
908 {
909 struct pci_dev *pdev = adapter->pdev;
910
911 pci_free_consistent(pdev, adapter->ring_header.size,
912 adapter->ring_header.desc,
913 adapter->ring_header.dma);
914 adapter->ring_header.desc = NULL;
915
916 /* Note: just free tdp_ring.buffer_info,
917 * it contain rfd_ring.buffer_info, do not double free */
918 if (adapter->tpd_ring[0].buffer_info) {
919 kfree(adapter->tpd_ring[0].buffer_info);
920 adapter->tpd_ring[0].buffer_info = NULL;
921 }
922 }
923
924 /*
925 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
926 * @adapter: board private structure
927 *
928 * Return 0 on success, negative on failure
929 */
930 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
931 {
932 struct pci_dev *pdev = adapter->pdev;
933 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
934 struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
935 struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
936 struct atl1c_ring_header *ring_header = &adapter->ring_header;
937 int num_rx_queues = adapter->num_rx_queues;
938 int size;
939 int i;
940 int count = 0;
941 int rx_desc_count = 0;
942 u32 offset = 0;
943
944 rrd_ring[0].count = rfd_ring[0].count;
945 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
946 tpd_ring[i].count = tpd_ring[0].count;
947
948 for (i = 1; i < adapter->num_rx_queues; i++)
949 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
950
951 /* 2 tpd queue, one high priority queue,
952 * another normal priority queue */
953 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
954 rfd_ring->count * num_rx_queues);
955 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
956 if (unlikely(!tpd_ring->buffer_info)) {
957 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
958 size);
959 goto err_nomem;
960 }
961 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
962 tpd_ring[i].buffer_info =
963 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
964 count += tpd_ring[i].count;
965 }
966
967 for (i = 0; i < num_rx_queues; i++) {
968 rfd_ring[i].buffer_info =
969 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
970 count += rfd_ring[i].count;
971 rx_desc_count += rfd_ring[i].count;
972 }
973 /*
974 * real ring DMA buffer
975 * each ring/block may need up to 8 bytes for alignment, hence the
976 * additional bytes tacked onto the end.
977 */
978 ring_header->size = size =
979 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
980 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
981 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
982 sizeof(struct atl1c_hw_stats) +
983 8 * 4 + 8 * 2 * num_rx_queues;
984
985 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
986 &ring_header->dma);
987 if (unlikely(!ring_header->desc)) {
988 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
989 goto err_nomem;
990 }
991 memset(ring_header->desc, 0, ring_header->size);
992 /* init TPD ring */
993
994 tpd_ring[0].dma = roundup(ring_header->dma, 8);
995 offset = tpd_ring[0].dma - ring_header->dma;
996 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
997 tpd_ring[i].dma = ring_header->dma + offset;
998 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
999 tpd_ring[i].size =
1000 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1001 offset += roundup(tpd_ring[i].size, 8);
1002 }
1003 /* init RFD ring */
1004 for (i = 0; i < num_rx_queues; i++) {
1005 rfd_ring[i].dma = ring_header->dma + offset;
1006 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
1007 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1008 rfd_ring[i].count;
1009 offset += roundup(rfd_ring[i].size, 8);
1010 }
1011
1012 /* init RRD ring */
1013 for (i = 0; i < num_rx_queues; i++) {
1014 rrd_ring[i].dma = ring_header->dma + offset;
1015 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
1016 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1017 rrd_ring[i].count;
1018 offset += roundup(rrd_ring[i].size, 8);
1019 }
1020
1021 adapter->smb.dma = ring_header->dma + offset;
1022 adapter->smb.smb = (u8 *)ring_header->desc + offset;
1023 return 0;
1024
1025 err_nomem:
1026 kfree(tpd_ring->buffer_info);
1027 return -ENOMEM;
1028 }
1029
1030 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1031 {
1032 struct atl1c_hw *hw = &adapter->hw;
1033 struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
1034 adapter->rfd_ring;
1035 struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
1036 adapter->rrd_ring;
1037 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1038 adapter->tpd_ring;
1039 struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
1040 struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
1041 int i;
1042 u32 data;
1043
1044 /* TPD */
1045 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1046 (u32)((tpd_ring[atl1c_trans_normal].dma &
1047 AT_DMA_HI_ADDR_MASK) >> 32));
1048 /* just enable normal priority TX queue */
1049 AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1050 (u32)(tpd_ring[atl1c_trans_normal].dma &
1051 AT_DMA_LO_ADDR_MASK));
1052 AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1053 (u32)(tpd_ring[atl1c_trans_high].dma &
1054 AT_DMA_LO_ADDR_MASK));
1055 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1056 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1057
1058
1059 /* RFD */
1060 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1061 (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1062 for (i = 0; i < adapter->num_rx_queues; i++)
1063 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1064 (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1065
1066 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1067 rfd_ring[0].count & RFD_RING_SIZE_MASK);
1068 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1069 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1070
1071 /* RRD */
1072 for (i = 0; i < adapter->num_rx_queues; i++)
1073 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1074 (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1075 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1076 (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1077
1078 /* CMB */
1079 AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1080
1081 /* SMB */
1082 AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1083 (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1084 AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1085 (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1086 if (hw->nic_type == athr_l2c_b) {
1087 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1088 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1089 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1090 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1091 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1092 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1093 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1094 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1095 }
1096 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1097 /* Power Saving for L2c_B */
1098 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1099 data |= SERDES_MAC_CLK_SLOWDOWN;
1100 data |= SERDES_PYH_CLK_SLOWDOWN;
1101 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1102 }
1103 /* Load all of base address above */
1104 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1105 }
1106
1107 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1108 {
1109 struct atl1c_hw *hw = &adapter->hw;
1110 u32 dev_ctrl_data;
1111 u32 max_pay_load;
1112 u16 tx_offload_thresh;
1113 u32 txq_ctrl_data;
1114 u32 max_pay_load_data;
1115
1116 tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1117 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1118 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1119 AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1120 max_pay_load = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1121 DEVICE_CTRL_MAX_PAYLOAD_MASK;
1122 hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
1123 max_pay_load = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1124 DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1125 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1126
1127 txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1128 TXQ_NUM_TPD_BURST_SHIFT;
1129 if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1130 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1131 max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1132 TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1133 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1134 max_pay_load_data >>= 1;
1135 txq_ctrl_data |= max_pay_load_data;
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 if (hw->rss_type == atl1c_rss_ipv4)
1151 rxq_ctrl_data |= RSS_HASH_IPV4;
1152 if (hw->rss_type == atl1c_rss_ipv4_tcp)
1153 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1154 if (hw->rss_type == atl1c_rss_ipv6)
1155 rxq_ctrl_data |= RSS_HASH_IPV6;
1156 if (hw->rss_type == atl1c_rss_ipv6_tcp)
1157 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1158 if (hw->rss_type != atl1c_rss_disable)
1159 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1160
1161 rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1162 RSS_MODE_SHIFT;
1163 rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1164 RSS_HASH_BITS_SHIFT;
1165 if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1166 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1167 ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1168
1169 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1170 }
1171
1172 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1173 {
1174 struct atl1c_hw *hw = &adapter->hw;
1175
1176 AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1177 AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1178 }
1179
1180 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1181 {
1182 struct atl1c_hw *hw = &adapter->hw;
1183 u32 dma_ctrl_data;
1184
1185 dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1186 if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1187 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1188 if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1189 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1190 else
1191 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1192
1193 switch (hw->dma_order) {
1194 case atl1c_dma_ord_in:
1195 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1196 break;
1197 case atl1c_dma_ord_enh:
1198 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1199 break;
1200 case atl1c_dma_ord_out:
1201 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1202 break;
1203 default:
1204 break;
1205 }
1206
1207 dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1208 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1209 dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1210 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1211 dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1212 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1213 dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1214 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1215
1216 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1217 }
1218
1219 /*
1220 * Stop the mac, transmit and receive units
1221 * hw - Struct containing variables accessed by shared code
1222 * return : 0 or idle status (if error)
1223 */
1224 static int atl1c_stop_mac(struct atl1c_hw *hw)
1225 {
1226 u32 data;
1227
1228 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1229 data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1230 RXQ3_CTRL_EN | RXQ_CTRL_EN);
1231 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1232
1233 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1234 data &= ~TXQ_CTRL_EN;
1235 AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1236
1237 atl1c_wait_until_idle(hw);
1238
1239 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1240 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1241 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1242
1243 return (int)atl1c_wait_until_idle(hw);
1244 }
1245
1246 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1247 {
1248 u32 data;
1249
1250 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1251 switch (hw->adapter->num_rx_queues) {
1252 case 4:
1253 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1254 break;
1255 case 3:
1256 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1257 break;
1258 case 2:
1259 data |= RXQ1_CTRL_EN;
1260 break;
1261 default:
1262 break;
1263 }
1264 data |= RXQ_CTRL_EN;
1265 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1266 }
1267
1268 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1269 {
1270 u32 data;
1271
1272 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1273 data |= TXQ_CTRL_EN;
1274 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1275 }
1276
1277 /*
1278 * Reset the transmit and receive units; mask and clear all interrupts.
1279 * hw - Struct containing variables accessed by shared code
1280 * return : 0 or idle status (if error)
1281 */
1282 static int atl1c_reset_mac(struct atl1c_hw *hw)
1283 {
1284 struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1285 struct pci_dev *pdev = adapter->pdev;
1286 u32 master_ctrl_data = 0;
1287
1288 AT_WRITE_REG(hw, REG_IMR, 0);
1289 AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1290
1291 atl1c_stop_mac(hw);
1292 /*
1293 * Issue Soft Reset to the MAC. This will reset the chip's
1294 * transmit, receive, DMA. It will not effect
1295 * the current PCI configuration. The global reset bit is self-
1296 * clearing, and should clear within a microsecond.
1297 */
1298 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1299 master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1300 AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1301 & 0xFFFF));
1302
1303 AT_WRITE_FLUSH(hw);
1304 msleep(10);
1305 /* Wait at least 10ms for All module to be Idle */
1306
1307 if (atl1c_wait_until_idle(hw)) {
1308 dev_err(&pdev->dev,
1309 "MAC state machine can't be idle since"
1310 " disabled for 10ms second\n");
1311 return -1;
1312 }
1313 return 0;
1314 }
1315
1316 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1317 {
1318 u32 pm_ctrl_data;
1319
1320 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1321 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1322 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1323 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1324 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1325 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1326 pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1327 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1328
1329 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1330 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1331 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1332 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1333 }
1334
1335 /*
1336 * Set ASPM state.
1337 * Enable/disable L0s/L1 depend on link state.
1338 */
1339 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1340 {
1341 u32 pm_ctrl_data;
1342 u32 link_ctrl_data;
1343 u32 link_l1_timer = 0xF;
1344
1345 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1346 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1347
1348 pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1349 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1350 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1351 pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1352 PM_CTRL_LCKDET_TIMER_SHIFT);
1353 pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1354
1355 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1356 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1357 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1358 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1359 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1360 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1361 }
1362
1363 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1364
1365 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1366 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1367 PM_CTRL_PM_REQ_TIMER_SHIFT);
1368 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1369 PM_CTRL_PM_REQ_TIMER_SHIFT;
1370 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1371 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1372 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1373 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1374 }
1375 pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1376 if (linkup) {
1377 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1378 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1379 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1380 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1381 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1382 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1383
1384 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1385 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1386 if (hw->nic_type == athr_l2c_b)
1387 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1388 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1389 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1390 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1391 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1392 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1393 if (hw->adapter->link_speed == SPEED_100 ||
1394 hw->adapter->link_speed == SPEED_1000) {
1395 pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1396 PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1397 if (hw->nic_type == athr_l2c_b)
1398 link_l1_timer = 7;
1399 else if (hw->nic_type == athr_l2c_b2 ||
1400 hw->nic_type == athr_l1d_2)
1401 link_l1_timer = 4;
1402 pm_ctrl_data |= link_l1_timer <<
1403 PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1404 }
1405 } else {
1406 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1407 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1408 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1409 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1410 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1411 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1412
1413 }
1414 } else {
1415 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1416 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1417 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1418 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1419
1420 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1421 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1422 else
1423 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1424 }
1425 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1426
1427 return;
1428 }
1429
1430 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1431 {
1432 struct atl1c_hw *hw = &adapter->hw;
1433 struct net_device *netdev = adapter->netdev;
1434 u32 mac_ctrl_data;
1435
1436 mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1437 mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1438
1439 if (adapter->link_duplex == FULL_DUPLEX) {
1440 hw->mac_duplex = true;
1441 mac_ctrl_data |= MAC_CTRL_DUPLX;
1442 }
1443
1444 if (adapter->link_speed == SPEED_1000)
1445 hw->mac_speed = atl1c_mac_speed_1000;
1446 else
1447 hw->mac_speed = atl1c_mac_speed_10_100;
1448
1449 mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1450 MAC_CTRL_SPEED_SHIFT;
1451
1452 mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1453 mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1454 MAC_CTRL_PRMLEN_SHIFT);
1455
1456 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1457
1458 mac_ctrl_data |= MAC_CTRL_BC_EN;
1459 if (netdev->flags & IFF_PROMISC)
1460 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1461 if (netdev->flags & IFF_ALLMULTI)
1462 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1463
1464 mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1465 if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1466 hw->nic_type == athr_l1d_2) {
1467 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1468 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1469 }
1470 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1471 }
1472
1473 /*
1474 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1475 * @adapter: board private structure
1476 *
1477 * Configure the Tx /Rx unit of the MAC after a reset.
1478 */
1479 static int atl1c_configure(struct atl1c_adapter *adapter)
1480 {
1481 struct atl1c_hw *hw = &adapter->hw;
1482 u32 master_ctrl_data = 0;
1483 u32 intr_modrt_data;
1484 u32 data;
1485
1486 /* clear interrupt status */
1487 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1488 /* Clear any WOL status */
1489 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1490 /* set Interrupt Clear Timer
1491 * HW will enable self to assert interrupt event to system after
1492 * waiting x-time for software to notify it accept interrupt.
1493 */
1494
1495 data = CLK_GATING_EN_ALL;
1496 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1497 if (hw->nic_type == athr_l2c_b)
1498 data &= ~CLK_GATING_RXMAC_EN;
1499 } else
1500 data = 0;
1501 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1502
1503 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1504 hw->ict & INT_RETRIG_TIMER_MASK);
1505
1506 atl1c_configure_des_ring(adapter);
1507
1508 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1509 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1510 IRQ_MODRT_TX_TIMER_SHIFT;
1511 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1512 IRQ_MODRT_RX_TIMER_SHIFT;
1513 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1514 master_ctrl_data |=
1515 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1516 }
1517
1518 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1519 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1520
1521 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1522 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1523
1524 if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1525 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1526 hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1527 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1528 hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1529 }
1530
1531 if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1532 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1533 hw->smb_timer & SMB_STAT_TIMER_MASK);
1534 /* set MTU */
1535 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1536 VLAN_HLEN + ETH_FCS_LEN);
1537 /* HDS, disable */
1538 AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1539
1540 atl1c_configure_tx(adapter);
1541 atl1c_configure_rx(adapter);
1542 atl1c_configure_rss(adapter);
1543 atl1c_configure_dma(adapter);
1544
1545 return 0;
1546 }
1547
1548 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1549 {
1550 u16 hw_reg_addr = 0;
1551 unsigned long *stats_item = NULL;
1552 u32 data;
1553
1554 /* update rx status */
1555 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1556 stats_item = &adapter->hw_stats.rx_ok;
1557 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1558 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1559 *stats_item += data;
1560 stats_item++;
1561 hw_reg_addr += 4;
1562 }
1563 /* update tx status */
1564 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1565 stats_item = &adapter->hw_stats.tx_ok;
1566 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1567 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1568 *stats_item += data;
1569 stats_item++;
1570 hw_reg_addr += 4;
1571 }
1572 }
1573
1574 /*
1575 * atl1c_get_stats - Get System Network Statistics
1576 * @netdev: network interface device structure
1577 *
1578 * Returns the address of the device statistics structure.
1579 * The statistics are actually updated from the timer callback.
1580 */
1581 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1582 {
1583 struct atl1c_adapter *adapter = netdev_priv(netdev);
1584 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1585 struct net_device_stats *net_stats = &netdev->stats;
1586
1587 atl1c_update_hw_stats(adapter);
1588 net_stats->rx_packets = hw_stats->rx_ok;
1589 net_stats->tx_packets = hw_stats->tx_ok;
1590 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1591 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1592 net_stats->multicast = hw_stats->rx_mcast;
1593 net_stats->collisions = hw_stats->tx_1_col +
1594 hw_stats->tx_2_col * 2 +
1595 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1596 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1597 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1598 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1599 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1600 net_stats->rx_length_errors = hw_stats->rx_len_err;
1601 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1602 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1603 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1604
1605 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1606
1607 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1608 hw_stats->tx_underrun + hw_stats->tx_trunc;
1609 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1610 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1611 net_stats->tx_window_errors = hw_stats->tx_late_col;
1612
1613 return net_stats;
1614 }
1615
1616 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1617 {
1618 u16 phy_data;
1619
1620 spin_lock(&adapter->mdio_lock);
1621 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1622 spin_unlock(&adapter->mdio_lock);
1623 }
1624
1625 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1626 enum atl1c_trans_queue type)
1627 {
1628 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1629 &adapter->tpd_ring[type];
1630 struct atl1c_buffer *buffer_info;
1631 struct pci_dev *pdev = adapter->pdev;
1632 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1633 u16 hw_next_to_clean;
1634 u16 shift;
1635 u32 data;
1636
1637 if (type == atl1c_trans_high)
1638 shift = MB_HTPD_CONS_IDX_SHIFT;
1639 else
1640 shift = MB_NTPD_CONS_IDX_SHIFT;
1641
1642 AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1643 hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1644
1645 while (next_to_clean != hw_next_to_clean) {
1646 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1647 atl1c_clean_buffer(pdev, buffer_info, 1);
1648 if (++next_to_clean == tpd_ring->count)
1649 next_to_clean = 0;
1650 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1651 }
1652
1653 if (netif_queue_stopped(adapter->netdev) &&
1654 netif_carrier_ok(adapter->netdev)) {
1655 netif_wake_queue(adapter->netdev);
1656 }
1657
1658 return true;
1659 }
1660
1661 /*
1662 * atl1c_intr - Interrupt Handler
1663 * @irq: interrupt number
1664 * @data: pointer to a network interface device structure
1665 * @pt_regs: CPU registers structure
1666 */
1667 static irqreturn_t atl1c_intr(int irq, void *data)
1668 {
1669 struct net_device *netdev = data;
1670 struct atl1c_adapter *adapter = netdev_priv(netdev);
1671 struct pci_dev *pdev = adapter->pdev;
1672 struct atl1c_hw *hw = &adapter->hw;
1673 int max_ints = AT_MAX_INT_WORK;
1674 int handled = IRQ_NONE;
1675 u32 status;
1676 u32 reg_data;
1677
1678 do {
1679 AT_READ_REG(hw, REG_ISR, &reg_data);
1680 status = reg_data & hw->intr_mask;
1681
1682 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1683 if (max_ints != AT_MAX_INT_WORK)
1684 handled = IRQ_HANDLED;
1685 break;
1686 }
1687 /* link event */
1688 if (status & ISR_GPHY)
1689 atl1c_clear_phy_int(adapter);
1690 /* Ack ISR */
1691 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1692 if (status & ISR_RX_PKT) {
1693 if (likely(napi_schedule_prep(&adapter->napi))) {
1694 hw->intr_mask &= ~ISR_RX_PKT;
1695 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1696 __napi_schedule(&adapter->napi);
1697 }
1698 }
1699 if (status & ISR_TX_PKT)
1700 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1701
1702 handled = IRQ_HANDLED;
1703 /* check if PCIE PHY Link down */
1704 if (status & ISR_ERROR) {
1705 if (netif_msg_hw(adapter))
1706 dev_err(&pdev->dev,
1707 "atl1c hardware error (status = 0x%x)\n",
1708 status & ISR_ERROR);
1709 /* reset MAC */
1710 adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1711 schedule_work(&adapter->common_task);
1712 return IRQ_HANDLED;
1713 }
1714
1715 if (status & ISR_OVER)
1716 if (netif_msg_intr(adapter))
1717 dev_warn(&pdev->dev,
1718 "TX/RX overflow (status = 0x%x)\n",
1719 status & ISR_OVER);
1720
1721 /* link event */
1722 if (status & (ISR_GPHY | ISR_MANUAL)) {
1723 netdev->stats.tx_carrier_errors++;
1724 atl1c_link_chg_event(adapter);
1725 break;
1726 }
1727
1728 } while (--max_ints > 0);
1729 /* re-enable Interrupt*/
1730 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1731 return handled;
1732 }
1733
1734 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1735 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1736 {
1737 /*
1738 * The pid field in RRS in not correct sometimes, so we
1739 * cannot figure out if the packet is fragmented or not,
1740 * so we tell the KERNEL CHECKSUM_NONE
1741 */
1742 skb_checksum_none_assert(skb);
1743 }
1744
1745 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1746 {
1747 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1748 struct pci_dev *pdev = adapter->pdev;
1749 struct atl1c_buffer *buffer_info, *next_info;
1750 struct sk_buff *skb;
1751 void *vir_addr = NULL;
1752 u16 num_alloc = 0;
1753 u16 rfd_next_to_use, next_next;
1754 struct atl1c_rx_free_desc *rfd_desc;
1755
1756 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1757 if (++next_next == rfd_ring->count)
1758 next_next = 0;
1759 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1760 next_info = &rfd_ring->buffer_info[next_next];
1761
1762 while (next_info->flags & ATL1C_BUFFER_FREE) {
1763 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1764
1765 skb = dev_alloc_skb(adapter->rx_buffer_len);
1766 if (unlikely(!skb)) {
1767 if (netif_msg_rx_err(adapter))
1768 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1769 break;
1770 }
1771
1772 /*
1773 * Make buffer alignment 2 beyond a 16 byte boundary
1774 * this will result in a 16 byte aligned IP header after
1775 * the 14 byte MAC header is removed
1776 */
1777 vir_addr = skb->data;
1778 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1779 buffer_info->skb = skb;
1780 buffer_info->length = adapter->rx_buffer_len;
1781 buffer_info->dma = pci_map_single(pdev, vir_addr,
1782 buffer_info->length,
1783 PCI_DMA_FROMDEVICE);
1784 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1785 ATL1C_PCIMAP_FROMDEVICE);
1786 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1787 rfd_next_to_use = next_next;
1788 if (++next_next == rfd_ring->count)
1789 next_next = 0;
1790 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1791 next_info = &rfd_ring->buffer_info[next_next];
1792 num_alloc++;
1793 }
1794
1795 if (num_alloc) {
1796 /* TODO: update mailbox here */
1797 wmb();
1798 rfd_ring->next_to_use = rfd_next_to_use;
1799 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1800 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1801 }
1802
1803 return num_alloc;
1804 }
1805
1806 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1807 struct atl1c_recv_ret_status *rrs, u16 num)
1808 {
1809 u16 i;
1810 /* the relationship between rrd and rfd is one map one */
1811 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1812 rrd_ring->next_to_clean)) {
1813 rrs->word3 &= ~RRS_RXD_UPDATED;
1814 if (++rrd_ring->next_to_clean == rrd_ring->count)
1815 rrd_ring->next_to_clean = 0;
1816 }
1817 }
1818
1819 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1820 struct atl1c_recv_ret_status *rrs, u16 num)
1821 {
1822 u16 i;
1823 u16 rfd_index;
1824 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1825
1826 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1827 RRS_RX_RFD_INDEX_MASK;
1828 for (i = 0; i < num; i++) {
1829 buffer_info[rfd_index].skb = NULL;
1830 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1831 ATL1C_BUFFER_FREE);
1832 if (++rfd_index == rfd_ring->count)
1833 rfd_index = 0;
1834 }
1835 rfd_ring->next_to_clean = rfd_index;
1836 }
1837
1838 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1839 int *work_done, int work_to_do)
1840 {
1841 u16 rfd_num, rfd_index;
1842 u16 count = 0;
1843 u16 length;
1844 struct pci_dev *pdev = adapter->pdev;
1845 struct net_device *netdev = adapter->netdev;
1846 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1847 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1848 struct sk_buff *skb;
1849 struct atl1c_recv_ret_status *rrs;
1850 struct atl1c_buffer *buffer_info;
1851
1852 while (1) {
1853 if (*work_done >= work_to_do)
1854 break;
1855 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1856 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1857 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1858 RRS_RX_RFD_CNT_MASK;
1859 if (unlikely(rfd_num != 1))
1860 /* TODO support mul rfd*/
1861 if (netif_msg_rx_err(adapter))
1862 dev_warn(&pdev->dev,
1863 "Multi rfd not support yet!\n");
1864 goto rrs_checked;
1865 } else {
1866 break;
1867 }
1868 rrs_checked:
1869 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1870 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1871 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1872 if (netif_msg_rx_err(adapter))
1873 dev_warn(&pdev->dev,
1874 "wrong packet! rrs word3 is %x\n",
1875 rrs->word3);
1876 continue;
1877 }
1878
1879 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1880 RRS_PKT_SIZE_MASK);
1881 /* Good Receive */
1882 if (likely(rfd_num == 1)) {
1883 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1884 RRS_RX_RFD_INDEX_MASK;
1885 buffer_info = &rfd_ring->buffer_info[rfd_index];
1886 pci_unmap_single(pdev, buffer_info->dma,
1887 buffer_info->length, PCI_DMA_FROMDEVICE);
1888 skb = buffer_info->skb;
1889 } else {
1890 /* TODO */
1891 if (netif_msg_rx_err(adapter))
1892 dev_warn(&pdev->dev,
1893 "Multi rfd not support yet!\n");
1894 break;
1895 }
1896 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1897 skb_put(skb, length - ETH_FCS_LEN);
1898 skb->protocol = eth_type_trans(skb, netdev);
1899 atl1c_rx_checksum(adapter, skb, rrs);
1900 if (rrs->word3 & RRS_VLAN_INS) {
1901 u16 vlan;
1902
1903 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1904 vlan = le16_to_cpu(vlan);
1905 __vlan_hwaccel_put_tag(skb, vlan);
1906 }
1907 netif_receive_skb(skb);
1908
1909 (*work_done)++;
1910 count++;
1911 }
1912 if (count)
1913 atl1c_alloc_rx_buffer(adapter, que);
1914 }
1915
1916 /*
1917 * atl1c_clean - NAPI Rx polling callback
1918 * @adapter: board private structure
1919 */
1920 static int atl1c_clean(struct napi_struct *napi, int budget)
1921 {
1922 struct atl1c_adapter *adapter =
1923 container_of(napi, struct atl1c_adapter, napi);
1924 int work_done = 0;
1925
1926 /* Keep link state information with original netdev */
1927 if (!netif_carrier_ok(adapter->netdev))
1928 goto quit_polling;
1929 /* just enable one RXQ */
1930 atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1931
1932 if (work_done < budget) {
1933 quit_polling:
1934 napi_complete(napi);
1935 adapter->hw.intr_mask |= ISR_RX_PKT;
1936 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1937 }
1938 return work_done;
1939 }
1940
1941 #ifdef CONFIG_NET_POLL_CONTROLLER
1942
1943 /*
1944 * Polling 'interrupt' - used by things like netconsole to send skbs
1945 * without having to re-enable interrupts. It's not called while
1946 * the interrupt routine is executing.
1947 */
1948 static void atl1c_netpoll(struct net_device *netdev)
1949 {
1950 struct atl1c_adapter *adapter = netdev_priv(netdev);
1951
1952 disable_irq(adapter->pdev->irq);
1953 atl1c_intr(adapter->pdev->irq, netdev);
1954 enable_irq(adapter->pdev->irq);
1955 }
1956 #endif
1957
1958 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1959 {
1960 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1961 u16 next_to_use = 0;
1962 u16 next_to_clean = 0;
1963
1964 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1965 next_to_use = tpd_ring->next_to_use;
1966
1967 return (u16)(next_to_clean > next_to_use) ?
1968 (next_to_clean - next_to_use - 1) :
1969 (tpd_ring->count + next_to_clean - next_to_use - 1);
1970 }
1971
1972 /*
1973 * get next usable tpd
1974 * Note: should call atl1c_tdp_avail to make sure
1975 * there is enough tpd to use
1976 */
1977 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1978 enum atl1c_trans_queue type)
1979 {
1980 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1981 struct atl1c_tpd_desc *tpd_desc;
1982 u16 next_to_use = 0;
1983
1984 next_to_use = tpd_ring->next_to_use;
1985 if (++tpd_ring->next_to_use == tpd_ring->count)
1986 tpd_ring->next_to_use = 0;
1987 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1988 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1989 return tpd_desc;
1990 }
1991
1992 static struct atl1c_buffer *
1993 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1994 {
1995 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1996
1997 return &tpd_ring->buffer_info[tpd -
1998 (struct atl1c_tpd_desc *)tpd_ring->desc];
1999 }
2000
2001 /* Calculate the transmit packet descript needed*/
2002 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2003 {
2004 u16 tpd_req;
2005 u16 proto_hdr_len = 0;
2006
2007 tpd_req = skb_shinfo(skb)->nr_frags + 1;
2008
2009 if (skb_is_gso(skb)) {
2010 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2011 if (proto_hdr_len < skb_headlen(skb))
2012 tpd_req++;
2013 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2014 tpd_req++;
2015 }
2016 return tpd_req;
2017 }
2018
2019 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2020 struct sk_buff *skb,
2021 struct atl1c_tpd_desc **tpd,
2022 enum atl1c_trans_queue type)
2023 {
2024 struct pci_dev *pdev = adapter->pdev;
2025 u8 hdr_len;
2026 u32 real_len;
2027 unsigned short offload_type;
2028 int err;
2029
2030 if (skb_is_gso(skb)) {
2031 if (skb_header_cloned(skb)) {
2032 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2033 if (unlikely(err))
2034 return -1;
2035 }
2036 offload_type = skb_shinfo(skb)->gso_type;
2037
2038 if (offload_type & SKB_GSO_TCPV4) {
2039 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2040 + ntohs(ip_hdr(skb)->tot_len));
2041
2042 if (real_len < skb->len)
2043 pskb_trim(skb, real_len);
2044
2045 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2046 if (unlikely(skb->len == hdr_len)) {
2047 /* only xsum need */
2048 if (netif_msg_tx_queued(adapter))
2049 dev_warn(&pdev->dev,
2050 "IPV4 tso with zero data??\n");
2051 goto check_sum;
2052 } else {
2053 ip_hdr(skb)->check = 0;
2054 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2055 ip_hdr(skb)->saddr,
2056 ip_hdr(skb)->daddr,
2057 0, IPPROTO_TCP, 0);
2058 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2059 }
2060 }
2061
2062 if (offload_type & SKB_GSO_TCPV6) {
2063 struct atl1c_tpd_ext_desc *etpd =
2064 *(struct atl1c_tpd_ext_desc **)(tpd);
2065
2066 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2067 *tpd = atl1c_get_tpd(adapter, type);
2068 ipv6_hdr(skb)->payload_len = 0;
2069 /* check payload == 0 byte ? */
2070 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2071 if (unlikely(skb->len == hdr_len)) {
2072 /* only xsum need */
2073 if (netif_msg_tx_queued(adapter))
2074 dev_warn(&pdev->dev,
2075 "IPV6 tso with zero data??\n");
2076 goto check_sum;
2077 } else
2078 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2079 &ipv6_hdr(skb)->saddr,
2080 &ipv6_hdr(skb)->daddr,
2081 0, IPPROTO_TCP, 0);
2082 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2083 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2084 etpd->pkt_len = cpu_to_le32(skb->len);
2085 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2086 }
2087
2088 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2089 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2090 TPD_TCPHDR_OFFSET_SHIFT;
2091 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2092 TPD_MSS_SHIFT;
2093 return 0;
2094 }
2095
2096 check_sum:
2097 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2098 u8 css, cso;
2099 cso = skb_checksum_start_offset(skb);
2100
2101 if (unlikely(cso & 0x1)) {
2102 if (netif_msg_tx_err(adapter))
2103 dev_err(&adapter->pdev->dev,
2104 "payload offset should not an event number\n");
2105 return -1;
2106 } else {
2107 css = cso + skb->csum_offset;
2108
2109 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2110 TPD_PLOADOFFSET_SHIFT;
2111 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2112 TPD_CCSUM_OFFSET_SHIFT;
2113 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2114 }
2115 }
2116 return 0;
2117 }
2118
2119 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2120 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2121 enum atl1c_trans_queue type)
2122 {
2123 struct atl1c_tpd_desc *use_tpd = NULL;
2124 struct atl1c_buffer *buffer_info = NULL;
2125 u16 buf_len = skb_headlen(skb);
2126 u16 map_len = 0;
2127 u16 mapped_len = 0;
2128 u16 hdr_len = 0;
2129 u16 nr_frags;
2130 u16 f;
2131 int tso;
2132
2133 nr_frags = skb_shinfo(skb)->nr_frags;
2134 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2135 if (tso) {
2136 /* TSO */
2137 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2138 use_tpd = tpd;
2139
2140 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2141 buffer_info->length = map_len;
2142 buffer_info->dma = pci_map_single(adapter->pdev,
2143 skb->data, hdr_len, PCI_DMA_TODEVICE);
2144 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2145 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2146 ATL1C_PCIMAP_TODEVICE);
2147 mapped_len += map_len;
2148 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2149 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2150 }
2151
2152 if (mapped_len < buf_len) {
2153 /* mapped_len == 0, means we should use the first tpd,
2154 which is given by caller */
2155 if (mapped_len == 0)
2156 use_tpd = tpd;
2157 else {
2158 use_tpd = atl1c_get_tpd(adapter, type);
2159 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2160 }
2161 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2162 buffer_info->length = buf_len - mapped_len;
2163 buffer_info->dma =
2164 pci_map_single(adapter->pdev, skb->data + mapped_len,
2165 buffer_info->length, PCI_DMA_TODEVICE);
2166 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2167 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2168 ATL1C_PCIMAP_TODEVICE);
2169 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2170 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2171 }
2172
2173 for (f = 0; f < nr_frags; f++) {
2174 struct skb_frag_struct *frag;
2175
2176 frag = &skb_shinfo(skb)->frags[f];
2177
2178 use_tpd = atl1c_get_tpd(adapter, type);
2179 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2180
2181 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2182 buffer_info->length = frag->size;
2183 buffer_info->dma =
2184 pci_map_page(adapter->pdev, frag->page,
2185 frag->page_offset,
2186 buffer_info->length,
2187 PCI_DMA_TODEVICE);
2188 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2189 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2190 ATL1C_PCIMAP_TODEVICE);
2191 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2192 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2193 }
2194
2195 /* The last tpd */
2196 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2197 /* The last buffer info contain the skb address,
2198 so it will be free after unmap */
2199 buffer_info->skb = skb;
2200 }
2201
2202 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2203 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2204 {
2205 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2206 u32 prod_data;
2207
2208 AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2209 switch (type) {
2210 case atl1c_trans_high:
2211 prod_data &= 0xFFFF0000;
2212 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2213 break;
2214 case atl1c_trans_normal:
2215 prod_data &= 0x0000FFFF;
2216 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2217 break;
2218 default:
2219 break;
2220 }
2221 wmb();
2222 AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2223 }
2224
2225 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2226 struct net_device *netdev)
2227 {
2228 struct atl1c_adapter *adapter = netdev_priv(netdev);
2229 unsigned long flags;
2230 u16 tpd_req = 1;
2231 struct atl1c_tpd_desc *tpd;
2232 enum atl1c_trans_queue type = atl1c_trans_normal;
2233
2234 if (test_bit(__AT_DOWN, &adapter->flags)) {
2235 dev_kfree_skb_any(skb);
2236 return NETDEV_TX_OK;
2237 }
2238
2239 tpd_req = atl1c_cal_tpd_req(skb);
2240 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2241 if (netif_msg_pktdata(adapter))
2242 dev_info(&adapter->pdev->dev, "tx locked\n");
2243 return NETDEV_TX_LOCKED;
2244 }
2245 if (skb->mark == 0x01)
2246 type = atl1c_trans_high;
2247 else
2248 type = atl1c_trans_normal;
2249
2250 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2251 /* no enough descriptor, just stop queue */
2252 netif_stop_queue(netdev);
2253 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2254 return NETDEV_TX_BUSY;
2255 }
2256
2257 tpd = atl1c_get_tpd(adapter, type);
2258
2259 /* do TSO and check sum */
2260 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2261 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2262 dev_kfree_skb_any(skb);
2263 return NETDEV_TX_OK;
2264 }
2265
2266 if (unlikely(vlan_tx_tag_present(skb))) {
2267 u16 vlan = vlan_tx_tag_get(skb);
2268 __le16 tag;
2269
2270 vlan = cpu_to_le16(vlan);
2271 AT_VLAN_TO_TAG(vlan, tag);
2272 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2273 tpd->vlan_tag = tag;
2274 }
2275
2276 if (skb_network_offset(skb) != ETH_HLEN)
2277 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2278
2279 atl1c_tx_map(adapter, skb, tpd, type);
2280 atl1c_tx_queue(adapter, skb, tpd, type);
2281
2282 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2283 return NETDEV_TX_OK;
2284 }
2285
2286 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2287 {
2288 struct net_device *netdev = adapter->netdev;
2289
2290 free_irq(adapter->pdev->irq, netdev);
2291
2292 if (adapter->have_msi)
2293 pci_disable_msi(adapter->pdev);
2294 }
2295
2296 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2297 {
2298 struct pci_dev *pdev = adapter->pdev;
2299 struct net_device *netdev = adapter->netdev;
2300 int flags = 0;
2301 int err = 0;
2302
2303 adapter->have_msi = true;
2304 err = pci_enable_msi(adapter->pdev);
2305 if (err) {
2306 if (netif_msg_ifup(adapter))
2307 dev_err(&pdev->dev,
2308 "Unable to allocate MSI interrupt Error: %d\n",
2309 err);
2310 adapter->have_msi = false;
2311 } else
2312 netdev->irq = pdev->irq;
2313
2314 if (!adapter->have_msi)
2315 flags |= IRQF_SHARED;
2316 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2317 netdev->name, netdev);
2318 if (err) {
2319 if (netif_msg_ifup(adapter))
2320 dev_err(&pdev->dev,
2321 "Unable to allocate interrupt Error: %d\n",
2322 err);
2323 if (adapter->have_msi)
2324 pci_disable_msi(adapter->pdev);
2325 return err;
2326 }
2327 if (netif_msg_ifup(adapter))
2328 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2329 return err;
2330 }
2331
2332 static int atl1c_up(struct atl1c_adapter *adapter)
2333 {
2334 struct net_device *netdev = adapter->netdev;
2335 int num;
2336 int err;
2337 int i;
2338
2339 netif_carrier_off(netdev);
2340 atl1c_init_ring_ptrs(adapter);
2341 atl1c_set_multi(netdev);
2342 atl1c_restore_vlan(adapter);
2343
2344 for (i = 0; i < adapter->num_rx_queues; i++) {
2345 num = atl1c_alloc_rx_buffer(adapter, i);
2346 if (unlikely(num == 0)) {
2347 err = -ENOMEM;
2348 goto err_alloc_rx;
2349 }
2350 }
2351
2352 if (atl1c_configure(adapter)) {
2353 err = -EIO;
2354 goto err_up;
2355 }
2356
2357 err = atl1c_request_irq(adapter);
2358 if (unlikely(err))
2359 goto err_up;
2360
2361 clear_bit(__AT_DOWN, &adapter->flags);
2362 napi_enable(&adapter->napi);
2363 atl1c_irq_enable(adapter);
2364 atl1c_check_link_status(adapter);
2365 netif_start_queue(netdev);
2366 return err;
2367
2368 err_up:
2369 err_alloc_rx:
2370 atl1c_clean_rx_ring(adapter);
2371 return err;
2372 }
2373
2374 static void atl1c_down(struct atl1c_adapter *adapter)
2375 {
2376 struct net_device *netdev = adapter->netdev;
2377
2378 atl1c_del_timer(adapter);
2379 adapter->work_event = 0; /* clear all event */
2380 /* signal that we're down so the interrupt handler does not
2381 * reschedule our watchdog timer */
2382 set_bit(__AT_DOWN, &adapter->flags);
2383 netif_carrier_off(netdev);
2384 napi_disable(&adapter->napi);
2385 atl1c_irq_disable(adapter);
2386 atl1c_free_irq(adapter);
2387 /* reset MAC to disable all RX/TX */
2388 atl1c_reset_mac(&adapter->hw);
2389 msleep(1);
2390
2391 adapter->link_speed = SPEED_0;
2392 adapter->link_duplex = -1;
2393 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2394 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2395 atl1c_clean_rx_ring(adapter);
2396 }
2397
2398 /*
2399 * atl1c_open - Called when a network interface is made active
2400 * @netdev: network interface device structure
2401 *
2402 * Returns 0 on success, negative value on failure
2403 *
2404 * The open entry point is called when a network interface is made
2405 * active by the system (IFF_UP). At this point all resources needed
2406 * for transmit and receive operations are allocated, the interrupt
2407 * handler is registered with the OS, the watchdog timer is started,
2408 * and the stack is notified that the interface is ready.
2409 */
2410 static int atl1c_open(struct net_device *netdev)
2411 {
2412 struct atl1c_adapter *adapter = netdev_priv(netdev);
2413 int err;
2414
2415 /* disallow open during test */
2416 if (test_bit(__AT_TESTING, &adapter->flags))
2417 return -EBUSY;
2418
2419 /* allocate rx/tx dma buffer & descriptors */
2420 err = atl1c_setup_ring_resources(adapter);
2421 if (unlikely(err))
2422 return err;
2423
2424 err = atl1c_up(adapter);
2425 if (unlikely(err))
2426 goto err_up;
2427
2428 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2429 u32 phy_data;
2430
2431 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2432 phy_data |= MDIO_AP_EN;
2433 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2434 }
2435 return 0;
2436
2437 err_up:
2438 atl1c_free_irq(adapter);
2439 atl1c_free_ring_resources(adapter);
2440 atl1c_reset_mac(&adapter->hw);
2441 return err;
2442 }
2443
2444 /*
2445 * atl1c_close - Disables a network interface
2446 * @netdev: network interface device structure
2447 *
2448 * Returns 0, this is not allowed to fail
2449 *
2450 * The close entry point is called when an interface is de-activated
2451 * by the OS. The hardware is still under the drivers control, but
2452 * needs to be disabled. A global MAC reset is issued to stop the
2453 * hardware, and all transmit and receive resources are freed.
2454 */
2455 static int atl1c_close(struct net_device *netdev)
2456 {
2457 struct atl1c_adapter *adapter = netdev_priv(netdev);
2458
2459 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2460 atl1c_down(adapter);
2461 atl1c_free_ring_resources(adapter);
2462 return 0;
2463 }
2464
2465 static int atl1c_suspend(struct device *dev)
2466 {
2467 struct pci_dev *pdev = to_pci_dev(dev);
2468 struct net_device *netdev = pci_get_drvdata(pdev);
2469 struct atl1c_adapter *adapter = netdev_priv(netdev);
2470 struct atl1c_hw *hw = &adapter->hw;
2471 u32 mac_ctrl_data = 0;
2472 u32 master_ctrl_data = 0;
2473 u32 wol_ctrl_data = 0;
2474 u16 mii_intr_status_data = 0;
2475 u32 wufc = adapter->wol;
2476
2477 atl1c_disable_l0s_l1(hw);
2478 if (netif_running(netdev)) {
2479 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2480 atl1c_down(adapter);
2481 }
2482 netif_device_detach(netdev);
2483
2484 if (wufc)
2485 if (atl1c_phy_power_saving(hw) != 0)
2486 dev_dbg(&pdev->dev, "phy power saving failed");
2487
2488 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2489 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2490
2491 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2492 mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2493 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2494 MAC_CTRL_PRMLEN_MASK) <<
2495 MAC_CTRL_PRMLEN_SHIFT);
2496 mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2497 mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2498
2499 if (wufc) {
2500 mac_ctrl_data |= MAC_CTRL_RX_EN;
2501 if (adapter->link_speed == SPEED_1000 ||
2502 adapter->link_speed == SPEED_0) {
2503 mac_ctrl_data |= atl1c_mac_speed_1000 <<
2504 MAC_CTRL_SPEED_SHIFT;
2505 mac_ctrl_data |= MAC_CTRL_DUPLX;
2506 } else
2507 mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2508 MAC_CTRL_SPEED_SHIFT;
2509
2510 if (adapter->link_duplex == DUPLEX_FULL)
2511 mac_ctrl_data |= MAC_CTRL_DUPLX;
2512
2513 /* turn on magic packet wol */
2514 if (wufc & AT_WUFC_MAG)
2515 wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2516
2517 if (wufc & AT_WUFC_LNKC) {
2518 wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2519 /* only link up can wake up */
2520 if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2521 dev_dbg(&pdev->dev, "%s: read write phy "
2522 "register failed.\n",
2523 atl1c_driver_name);
2524 }
2525 }
2526 /* clear phy interrupt */
2527 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2528 /* Config MAC Ctrl register */
2529 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2530
2531 /* magic packet maybe Broadcast&multicast&Unicast frame */
2532 if (wufc & AT_WUFC_MAG)
2533 mac_ctrl_data |= MAC_CTRL_BC_EN;
2534
2535 dev_dbg(&pdev->dev,
2536 "%s: suspend MAC=0x%x\n",
2537 atl1c_driver_name, mac_ctrl_data);
2538 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2539 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2540 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2541
2542 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2543 GPHY_CTRL_EXT_RESET);
2544 } else {
2545 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2546 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2547 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2548 mac_ctrl_data |= MAC_CTRL_DUPLX;
2549 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2550 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2551 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2552 hw->phy_configured = false; /* re-init PHY when resume */
2553 }
2554
2555 return 0;
2556 }
2557
2558 #ifdef CONFIG_PM_SLEEP
2559 static int atl1c_resume(struct device *dev)
2560 {
2561 struct pci_dev *pdev = to_pci_dev(dev);
2562 struct net_device *netdev = pci_get_drvdata(pdev);
2563 struct atl1c_adapter *adapter = netdev_priv(netdev);
2564
2565 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2566 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2567 ATL1C_PCIE_PHY_RESET);
2568
2569 atl1c_phy_reset(&adapter->hw);
2570 atl1c_reset_mac(&adapter->hw);
2571 atl1c_phy_init(&adapter->hw);
2572
2573 #if 0
2574 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2575 pm_data &= ~PM_CTRLSTAT_PME_EN;
2576 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2577 #endif
2578
2579 netif_device_attach(netdev);
2580 if (netif_running(netdev))
2581 atl1c_up(adapter);
2582
2583 return 0;
2584 }
2585 #endif
2586
2587 static void atl1c_shutdown(struct pci_dev *pdev)
2588 {
2589 struct net_device *netdev = pci_get_drvdata(pdev);
2590 struct atl1c_adapter *adapter = netdev_priv(netdev);
2591
2592 atl1c_suspend(&pdev->dev);
2593 pci_wake_from_d3(pdev, adapter->wol);
2594 pci_set_power_state(pdev, PCI_D3hot);
2595 }
2596
2597 static const struct net_device_ops atl1c_netdev_ops = {
2598 .ndo_open = atl1c_open,
2599 .ndo_stop = atl1c_close,
2600 .ndo_validate_addr = eth_validate_addr,
2601 .ndo_start_xmit = atl1c_xmit_frame,
2602 .ndo_set_mac_address = atl1c_set_mac_addr,
2603 .ndo_set_multicast_list = atl1c_set_multi,
2604 .ndo_change_mtu = atl1c_change_mtu,
2605 .ndo_fix_features = atl1c_fix_features,
2606 .ndo_set_features = atl1c_set_features,
2607 .ndo_do_ioctl = atl1c_ioctl,
2608 .ndo_tx_timeout = atl1c_tx_timeout,
2609 .ndo_get_stats = atl1c_get_stats,
2610 #ifdef CONFIG_NET_POLL_CONTROLLER
2611 .ndo_poll_controller = atl1c_netpoll,
2612 #endif
2613 };
2614
2615 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2616 {
2617 SET_NETDEV_DEV(netdev, &pdev->dev);
2618 pci_set_drvdata(pdev, netdev);
2619
2620 netdev->irq = pdev->irq;
2621 netdev->netdev_ops = &atl1c_netdev_ops;
2622 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2623 atl1c_set_ethtool_ops(netdev);
2624
2625 /* TODO: add when ready */
2626 netdev->hw_features = NETIF_F_SG |
2627 NETIF_F_HW_CSUM |
2628 NETIF_F_HW_VLAN_RX |
2629 NETIF_F_TSO |
2630 NETIF_F_TSO6;
2631 netdev->features = netdev->hw_features |
2632 NETIF_F_HW_VLAN_TX;
2633 return 0;
2634 }
2635
2636 /*
2637 * atl1c_probe - Device Initialization Routine
2638 * @pdev: PCI device information struct
2639 * @ent: entry in atl1c_pci_tbl
2640 *
2641 * Returns 0 on success, negative on failure
2642 *
2643 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2644 * The OS initialization, configuring of the adapter private structure,
2645 * and a hardware reset occur.
2646 */
2647 static int __devinit atl1c_probe(struct pci_dev *pdev,
2648 const struct pci_device_id *ent)
2649 {
2650 struct net_device *netdev;
2651 struct atl1c_adapter *adapter;
2652 static int cards_found;
2653
2654 int err = 0;
2655
2656 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2657 err = pci_enable_device_mem(pdev);
2658 if (err) {
2659 dev_err(&pdev->dev, "cannot enable PCI device\n");
2660 return err;
2661 }
2662
2663 /*
2664 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2665 * shared register for the high 32 bits, so only a single, aligned,
2666 * 4 GB physical address range can be used at a time.
2667 *
2668 * Supporting 64-bit DMA on this hardware is more trouble than it's
2669 * worth. It is far easier to limit to 32-bit DMA than update
2670 * various kernel subsystems to support the mechanics required by a
2671 * fixed-high-32-bit system.
2672 */
2673 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2674 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2675 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2676 goto err_dma;
2677 }
2678
2679 err = pci_request_regions(pdev, atl1c_driver_name);
2680 if (err) {
2681 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2682 goto err_pci_reg;
2683 }
2684
2685 pci_set_master(pdev);
2686
2687 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2688 if (netdev == NULL) {
2689 err = -ENOMEM;
2690 dev_err(&pdev->dev, "etherdev alloc failed\n");
2691 goto err_alloc_etherdev;
2692 }
2693
2694 err = atl1c_init_netdev(netdev, pdev);
2695 if (err) {
2696 dev_err(&pdev->dev, "init netdevice failed\n");
2697 goto err_init_netdev;
2698 }
2699 adapter = netdev_priv(netdev);
2700 adapter->bd_number = cards_found;
2701 adapter->netdev = netdev;
2702 adapter->pdev = pdev;
2703 adapter->hw.adapter = adapter;
2704 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2705 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2706 if (!adapter->hw.hw_addr) {
2707 err = -EIO;
2708 dev_err(&pdev->dev, "cannot map device registers\n");
2709 goto err_ioremap;
2710 }
2711 netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2712
2713 /* init mii data */
2714 adapter->mii.dev = netdev;
2715 adapter->mii.mdio_read = atl1c_mdio_read;
2716 adapter->mii.mdio_write = atl1c_mdio_write;
2717 adapter->mii.phy_id_mask = 0x1f;
2718 adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2719 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2720 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2721 (unsigned long)adapter);
2722 /* setup the private structure */
2723 err = atl1c_sw_init(adapter);
2724 if (err) {
2725 dev_err(&pdev->dev, "net device private data init failed\n");
2726 goto err_sw_init;
2727 }
2728 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2729 ATL1C_PCIE_PHY_RESET);
2730
2731 /* Init GPHY as early as possible due to power saving issue */
2732 atl1c_phy_reset(&adapter->hw);
2733
2734 err = atl1c_reset_mac(&adapter->hw);
2735 if (err) {
2736 err = -EIO;
2737 goto err_reset;
2738 }
2739
2740 /* reset the controller to
2741 * put the device in a known good starting state */
2742 err = atl1c_phy_init(&adapter->hw);
2743 if (err) {
2744 err = -EIO;
2745 goto err_reset;
2746 }
2747 if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2748 err = -EIO;
2749 dev_err(&pdev->dev, "get mac address failed\n");
2750 goto err_eeprom;
2751 }
2752 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2753 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2754 if (netif_msg_probe(adapter))
2755 dev_dbg(&pdev->dev, "mac address : %pM\n",
2756 adapter->hw.mac_addr);
2757
2758 atl1c_hw_set_mac_addr(&adapter->hw);
2759 INIT_WORK(&adapter->common_task, atl1c_common_task);
2760 adapter->work_event = 0;
2761 err = register_netdev(netdev);
2762 if (err) {
2763 dev_err(&pdev->dev, "register netdevice failed\n");
2764 goto err_register;
2765 }
2766
2767 if (netif_msg_probe(adapter))
2768 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2769 cards_found++;
2770 return 0;
2771
2772 err_reset:
2773 err_register:
2774 err_sw_init:
2775 err_eeprom:
2776 iounmap(adapter->hw.hw_addr);
2777 err_init_netdev:
2778 err_ioremap:
2779 free_netdev(netdev);
2780 err_alloc_etherdev:
2781 pci_release_regions(pdev);
2782 err_pci_reg:
2783 err_dma:
2784 pci_disable_device(pdev);
2785 return err;
2786 }
2787
2788 /*
2789 * atl1c_remove - Device Removal Routine
2790 * @pdev: PCI device information struct
2791 *
2792 * atl1c_remove is called by the PCI subsystem to alert the driver
2793 * that it should release a PCI device. The could be caused by a
2794 * Hot-Plug event, or because the driver is going to be removed from
2795 * memory.
2796 */
2797 static void __devexit atl1c_remove(struct pci_dev *pdev)
2798 {
2799 struct net_device *netdev = pci_get_drvdata(pdev);
2800 struct atl1c_adapter *adapter = netdev_priv(netdev);
2801
2802 unregister_netdev(netdev);
2803 atl1c_phy_disable(&adapter->hw);
2804
2805 iounmap(adapter->hw.hw_addr);
2806
2807 pci_release_regions(pdev);
2808 pci_disable_device(pdev);
2809 free_netdev(netdev);
2810 }
2811
2812 /*
2813 * atl1c_io_error_detected - called when PCI error is detected
2814 * @pdev: Pointer to PCI device
2815 * @state: The current pci connection state
2816 *
2817 * This function is called after a PCI bus error affecting
2818 * this device has been detected.
2819 */
2820 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2821 pci_channel_state_t state)
2822 {
2823 struct net_device *netdev = pci_get_drvdata(pdev);
2824 struct atl1c_adapter *adapter = netdev_priv(netdev);
2825
2826 netif_device_detach(netdev);
2827
2828 if (state == pci_channel_io_perm_failure)
2829 return PCI_ERS_RESULT_DISCONNECT;
2830
2831 if (netif_running(netdev))
2832 atl1c_down(adapter);
2833
2834 pci_disable_device(pdev);
2835
2836 /* Request a slot slot reset. */
2837 return PCI_ERS_RESULT_NEED_RESET;
2838 }
2839
2840 /*
2841 * atl1c_io_slot_reset - called after the pci bus has been reset.
2842 * @pdev: Pointer to PCI device
2843 *
2844 * Restart the card from scratch, as if from a cold-boot. Implementation
2845 * resembles the first-half of the e1000_resume routine.
2846 */
2847 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2848 {
2849 struct net_device *netdev = pci_get_drvdata(pdev);
2850 struct atl1c_adapter *adapter = netdev_priv(netdev);
2851
2852 if (pci_enable_device(pdev)) {
2853 if (netif_msg_hw(adapter))
2854 dev_err(&pdev->dev,
2855 "Cannot re-enable PCI device after reset\n");
2856 return PCI_ERS_RESULT_DISCONNECT;
2857 }
2858 pci_set_master(pdev);
2859
2860 pci_enable_wake(pdev, PCI_D3hot, 0);
2861 pci_enable_wake(pdev, PCI_D3cold, 0);
2862
2863 atl1c_reset_mac(&adapter->hw);
2864
2865 return PCI_ERS_RESULT_RECOVERED;
2866 }
2867
2868 /*
2869 * atl1c_io_resume - called when traffic can start flowing again.
2870 * @pdev: Pointer to PCI device
2871 *
2872 * This callback is called when the error recovery driver tells us that
2873 * its OK to resume normal operation. Implementation resembles the
2874 * second-half of the atl1c_resume routine.
2875 */
2876 static void atl1c_io_resume(struct pci_dev *pdev)
2877 {
2878 struct net_device *netdev = pci_get_drvdata(pdev);
2879 struct atl1c_adapter *adapter = netdev_priv(netdev);
2880
2881 if (netif_running(netdev)) {
2882 if (atl1c_up(adapter)) {
2883 if (netif_msg_hw(adapter))
2884 dev_err(&pdev->dev,
2885 "Cannot bring device back up after reset\n");
2886 return;
2887 }
2888 }
2889
2890 netif_device_attach(netdev);
2891 }
2892
2893 static struct pci_error_handlers atl1c_err_handler = {
2894 .error_detected = atl1c_io_error_detected,
2895 .slot_reset = atl1c_io_slot_reset,
2896 .resume = atl1c_io_resume,
2897 };
2898
2899 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2900
2901 static struct pci_driver atl1c_driver = {
2902 .name = atl1c_driver_name,
2903 .id_table = atl1c_pci_tbl,
2904 .probe = atl1c_probe,
2905 .remove = __devexit_p(atl1c_remove),
2906 .shutdown = atl1c_shutdown,
2907 .err_handler = &atl1c_err_handler,
2908 .driver.pm = &atl1c_pm_ops,
2909 };
2910
2911 /*
2912 * atl1c_init_module - Driver Registration Routine
2913 *
2914 * atl1c_init_module is the first routine called when the driver is
2915 * loaded. All it does is register with the PCI subsystem.
2916 */
2917 static int __init atl1c_init_module(void)
2918 {
2919 return pci_register_driver(&atl1c_driver);
2920 }
2921
2922 /*
2923 * atl1c_exit_module - Driver Exit Cleanup Routine
2924 *
2925 * atl1c_exit_module is called just before the driver is removed
2926 * from memory.
2927 */
2928 static void __exit atl1c_exit_module(void)
2929 {
2930 pci_unregister_driver(&atl1c_driver);
2931 }
2932
2933 module_init(atl1c_init_module);
2934 module_exit(atl1c_exit_module);