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x86: Move call to print_modules() out of show_regs()
[deliverable/linux.git] / drivers / net / ethernet / atheros / atl1c / atl1c_main.c
1 /*
2 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
3 *
4 * Derived from Intel e1000 driver
5 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59
19 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22 #include "atl1c.h"
23
24 #define ATL1C_DRV_VERSION "1.0.1.0-NAPI"
25 char atl1c_driver_name[] = "atl1c";
26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
27
28 /*
29 * atl1c_pci_tbl - PCI Device ID Table
30 *
31 * Wildcard entries (PCI_ANY_ID) should come last
32 * Last entry must be all 0s
33 *
34 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
35 * Class, Class Mask, private data (not used) }
36 */
37 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
38 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
39 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
40 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
41 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
42 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
43 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
44 /* required last entry */
45 { 0 }
46 };
47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
48
49 MODULE_AUTHOR("Jie Yang");
50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
51 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_VERSION(ATL1C_DRV_VERSION);
54
55 static int atl1c_stop_mac(struct atl1c_hw *hw);
56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
60 int *work_done, int work_to_do);
61 static int atl1c_up(struct atl1c_adapter *adapter);
62 static void atl1c_down(struct atl1c_adapter *adapter);
63 static int atl1c_reset_mac(struct atl1c_hw *hw);
64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
65 static int atl1c_configure(struct atl1c_adapter *adapter);
66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
67
68 static const u16 atl1c_pay_load_size[] = {
69 128, 256, 512, 1024, 2048, 4096,
70 };
71
72
73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
74 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
76 {
77 u32 mst_data, data;
78
79 /* pclk sel could switch to 25M */
80 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
81 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
82 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
83
84 /* WoL/PCIE related settings */
85 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
86 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
87 data |= PCIE_PHYMISC_FORCE_RCV_DET;
88 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
89 } else { /* new dev set bit5 of MASTER */
90 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
91 AT_WRITE_REG(hw, REG_MASTER_CTRL,
92 mst_data | MASTER_CTRL_WAKEN_25M);
93 }
94 /* aspm/PCIE setting only for l2cb 1.0 */
95 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
96 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
97 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
98 L2CB1_PCIE_PHYMISC2_CDR_BW);
99 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
100 L2CB1_PCIE_PHYMISC2_L0S_TH);
101 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
102 /* extend L1 sync timer */
103 AT_READ_REG(hw, REG_LINK_CTRL, &data);
104 data |= LINK_CTRL_EXT_SYNC;
105 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
106 }
107 /* l2cb 1.x & l1d 1.x */
108 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
109 AT_READ_REG(hw, REG_PM_CTRL, &data);
110 data |= PM_CTRL_L0S_BUFSRX_EN;
111 AT_WRITE_REG(hw, REG_PM_CTRL, data);
112 /* clear vendor msg */
113 AT_READ_REG(hw, REG_DMA_DBG, &data);
114 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
115 }
116 }
117
118 /* FIXME: no need any more ? */
119 /*
120 * atl1c_init_pcie - init PCIE module
121 */
122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
123 {
124 u32 data;
125 u32 pci_cmd;
126 struct pci_dev *pdev = hw->adapter->pdev;
127 int pos;
128
129 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
130 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
131 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
132 PCI_COMMAND_IO);
133 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
134
135 /*
136 * Clear any PowerSaveing Settings
137 */
138 pci_enable_wake(pdev, PCI_D3hot, 0);
139 pci_enable_wake(pdev, PCI_D3cold, 0);
140 /* wol sts read-clear */
141 AT_READ_REG(hw, REG_WOL_CTRL, &data);
142 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
143
144 /*
145 * Mask some pcie error bits
146 */
147 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
148 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
149 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
150 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
151 /* clear error status */
152 pci_write_config_word(pdev, pci_pcie_cap(pdev) + PCI_EXP_DEVSTA,
153 PCI_EXP_DEVSTA_NFED |
154 PCI_EXP_DEVSTA_FED |
155 PCI_EXP_DEVSTA_CED |
156 PCI_EXP_DEVSTA_URD);
157
158 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
159 data &= ~LTSSM_ID_EN_WRO;
160 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
161
162 atl1c_pcie_patch(hw);
163 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
164 atl1c_disable_l0s_l1(hw);
165
166 msleep(5);
167 }
168
169 /*
170 * atl1c_irq_enable - Enable default interrupt generation settings
171 * @adapter: board private structure
172 */
173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
174 {
175 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
176 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
177 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
178 AT_WRITE_FLUSH(&adapter->hw);
179 }
180 }
181
182 /*
183 * atl1c_irq_disable - Mask off interrupt generation on the NIC
184 * @adapter: board private structure
185 */
186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
187 {
188 atomic_inc(&adapter->irq_sem);
189 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
190 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
191 AT_WRITE_FLUSH(&adapter->hw);
192 synchronize_irq(adapter->pdev->irq);
193 }
194
195 /*
196 * atl1c_irq_reset - reset interrupt confiure on the NIC
197 * @adapter: board private structure
198 */
199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
200 {
201 atomic_set(&adapter->irq_sem, 1);
202 atl1c_irq_enable(adapter);
203 }
204
205 /*
206 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
207 * of the idle status register until the device is actually idle
208 */
209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
210 {
211 int timeout;
212 u32 data;
213
214 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
215 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
216 if ((data & modu_ctrl) == 0)
217 return 0;
218 msleep(1);
219 }
220 return data;
221 }
222
223 /*
224 * atl1c_phy_config - Timer Call-back
225 * @data: pointer to netdev cast into an unsigned long
226 */
227 static void atl1c_phy_config(unsigned long data)
228 {
229 struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
230 struct atl1c_hw *hw = &adapter->hw;
231 unsigned long flags;
232
233 spin_lock_irqsave(&adapter->mdio_lock, flags);
234 atl1c_restart_autoneg(hw);
235 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
236 }
237
238 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
239 {
240 WARN_ON(in_interrupt());
241 atl1c_down(adapter);
242 atl1c_up(adapter);
243 clear_bit(__AT_RESETTING, &adapter->flags);
244 }
245
246 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
247 {
248 struct atl1c_hw *hw = &adapter->hw;
249 struct net_device *netdev = adapter->netdev;
250 struct pci_dev *pdev = adapter->pdev;
251 int err;
252 unsigned long flags;
253 u16 speed, duplex, phy_data;
254
255 spin_lock_irqsave(&adapter->mdio_lock, flags);
256 /* MII_BMSR must read twise */
257 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
258 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
259 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
260
261 if ((phy_data & BMSR_LSTATUS) == 0) {
262 /* link down */
263 netif_carrier_off(netdev);
264 netif_stop_queue(netdev);
265 hw->hibernate = true;
266 if (atl1c_reset_mac(hw) != 0)
267 if (netif_msg_hw(adapter))
268 dev_warn(&pdev->dev, "reset mac failed\n");
269 atl1c_set_aspm(hw, SPEED_0);
270 atl1c_post_phy_linkchg(hw, SPEED_0);
271 atl1c_reset_dma_ring(adapter);
272 atl1c_configure(adapter);
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, speed);
287 atl1c_post_phy_linkchg(hw, speed);
288 atl1c_start_mac(adapter);
289 if (netif_msg_link(adapter))
290 dev_info(&pdev->dev,
291 "%s: %s NIC Link is Up<%d Mbps %s>\n",
292 atl1c_driver_name, netdev->name,
293 adapter->link_speed,
294 adapter->link_duplex == FULL_DUPLEX ?
295 "Full Duplex" : "Half Duplex");
296 }
297 if (!netif_carrier_ok(netdev))
298 netif_carrier_on(netdev);
299 }
300 }
301
302 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
303 {
304 struct net_device *netdev = adapter->netdev;
305 struct pci_dev *pdev = adapter->pdev;
306 u16 phy_data;
307 u16 link_up;
308
309 spin_lock(&adapter->mdio_lock);
310 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
311 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
312 spin_unlock(&adapter->mdio_lock);
313 link_up = phy_data & BMSR_LSTATUS;
314 /* notify upper layer link down ASAP */
315 if (!link_up) {
316 if (netif_carrier_ok(netdev)) {
317 /* old link state: Up */
318 netif_carrier_off(netdev);
319 if (netif_msg_link(adapter))
320 dev_info(&pdev->dev,
321 "%s: %s NIC Link is Down\n",
322 atl1c_driver_name, netdev->name);
323 adapter->link_speed = SPEED_0;
324 }
325 }
326
327 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
328 schedule_work(&adapter->common_task);
329 }
330
331 static void atl1c_common_task(struct work_struct *work)
332 {
333 struct atl1c_adapter *adapter;
334 struct net_device *netdev;
335
336 adapter = container_of(work, struct atl1c_adapter, common_task);
337 netdev = adapter->netdev;
338
339 if (test_bit(__AT_DOWN, &adapter->flags))
340 return;
341
342 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
343 netif_device_detach(netdev);
344 atl1c_down(adapter);
345 atl1c_up(adapter);
346 netif_device_attach(netdev);
347 }
348
349 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
350 &adapter->work_event)) {
351 atl1c_irq_disable(adapter);
352 atl1c_check_link_status(adapter);
353 atl1c_irq_enable(adapter);
354 }
355 }
356
357
358 static void atl1c_del_timer(struct atl1c_adapter *adapter)
359 {
360 del_timer_sync(&adapter->phy_config_timer);
361 }
362
363
364 /*
365 * atl1c_tx_timeout - Respond to a Tx Hang
366 * @netdev: network interface device structure
367 */
368 static void atl1c_tx_timeout(struct net_device *netdev)
369 {
370 struct atl1c_adapter *adapter = netdev_priv(netdev);
371
372 /* Do the reset outside of interrupt context */
373 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
374 schedule_work(&adapter->common_task);
375 }
376
377 /*
378 * atl1c_set_multi - Multicast and Promiscuous mode set
379 * @netdev: network interface device structure
380 *
381 * The set_multi entry point is called whenever the multicast address
382 * list or the network interface flags are updated. This routine is
383 * responsible for configuring the hardware for proper multicast,
384 * promiscuous mode, and all-multi behavior.
385 */
386 static void atl1c_set_multi(struct net_device *netdev)
387 {
388 struct atl1c_adapter *adapter = netdev_priv(netdev);
389 struct atl1c_hw *hw = &adapter->hw;
390 struct netdev_hw_addr *ha;
391 u32 mac_ctrl_data;
392 u32 hash_value;
393
394 /* Check for Promiscuous and All Multicast modes */
395 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
396
397 if (netdev->flags & IFF_PROMISC) {
398 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
399 } else if (netdev->flags & IFF_ALLMULTI) {
400 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
401 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
402 } else {
403 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
404 }
405
406 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
407
408 /* clear the old settings from the multicast hash table */
409 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
410 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
411
412 /* comoute mc addresses' hash value ,and put it into hash table */
413 netdev_for_each_mc_addr(ha, netdev) {
414 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
415 atl1c_hash_set(hw, hash_value);
416 }
417 }
418
419 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
420 {
421 if (features & NETIF_F_HW_VLAN_RX) {
422 /* enable VLAN tag insert/strip */
423 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
424 } else {
425 /* disable VLAN tag insert/strip */
426 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
427 }
428 }
429
430 static void atl1c_vlan_mode(struct net_device *netdev,
431 netdev_features_t features)
432 {
433 struct atl1c_adapter *adapter = netdev_priv(netdev);
434 struct pci_dev *pdev = adapter->pdev;
435 u32 mac_ctrl_data = 0;
436
437 if (netif_msg_pktdata(adapter))
438 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
439
440 atl1c_irq_disable(adapter);
441 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
442 __atl1c_vlan_mode(features, &mac_ctrl_data);
443 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
444 atl1c_irq_enable(adapter);
445 }
446
447 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
448 {
449 struct pci_dev *pdev = adapter->pdev;
450
451 if (netif_msg_pktdata(adapter))
452 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
453 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
454 }
455
456 /*
457 * atl1c_set_mac - Change the Ethernet Address of the NIC
458 * @netdev: network interface device structure
459 * @p: pointer to an address structure
460 *
461 * Returns 0 on success, negative on failure
462 */
463 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
464 {
465 struct atl1c_adapter *adapter = netdev_priv(netdev);
466 struct sockaddr *addr = p;
467
468 if (!is_valid_ether_addr(addr->sa_data))
469 return -EADDRNOTAVAIL;
470
471 if (netif_running(netdev))
472 return -EBUSY;
473
474 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
475 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
476 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
477
478 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
479
480 return 0;
481 }
482
483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
484 struct net_device *dev)
485 {
486 int mtu = dev->mtu;
487
488 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
489 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
490 }
491
492 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
493 netdev_features_t features)
494 {
495 /*
496 * Since there is no support for separate rx/tx vlan accel
497 * enable/disable make sure tx flag is always in same state as rx.
498 */
499 if (features & NETIF_F_HW_VLAN_RX)
500 features |= NETIF_F_HW_VLAN_TX;
501 else
502 features &= ~NETIF_F_HW_VLAN_TX;
503
504 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
505 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
506
507 return features;
508 }
509
510 static int atl1c_set_features(struct net_device *netdev,
511 netdev_features_t features)
512 {
513 netdev_features_t changed = netdev->features ^ features;
514
515 if (changed & NETIF_F_HW_VLAN_RX)
516 atl1c_vlan_mode(netdev, features);
517
518 return 0;
519 }
520
521 /*
522 * atl1c_change_mtu - Change the Maximum Transfer Unit
523 * @netdev: network interface device structure
524 * @new_mtu: new value for maximum frame size
525 *
526 * Returns 0 on success, negative on failure
527 */
528 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
529 {
530 struct atl1c_adapter *adapter = netdev_priv(netdev);
531 struct atl1c_hw *hw = &adapter->hw;
532 int old_mtu = netdev->mtu;
533 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
534
535 /* Fast Ethernet controller doesn't support jumbo packet */
536 if (((hw->nic_type == athr_l2c ||
537 hw->nic_type == athr_l2c_b ||
538 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
539 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
540 max_frame > MAX_JUMBO_FRAME_SIZE) {
541 if (netif_msg_link(adapter))
542 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
543 return -EINVAL;
544 }
545 /* set MTU */
546 if (old_mtu != new_mtu && netif_running(netdev)) {
547 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
548 msleep(1);
549 netdev->mtu = new_mtu;
550 adapter->hw.max_frame_size = new_mtu;
551 atl1c_set_rxbufsize(adapter, netdev);
552 atl1c_down(adapter);
553 netdev_update_features(netdev);
554 atl1c_up(adapter);
555 clear_bit(__AT_RESETTING, &adapter->flags);
556 }
557 return 0;
558 }
559
560 /*
561 * caller should hold mdio_lock
562 */
563 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
564 {
565 struct atl1c_adapter *adapter = netdev_priv(netdev);
566 u16 result;
567
568 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
569 return result;
570 }
571
572 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
573 int reg_num, int val)
574 {
575 struct atl1c_adapter *adapter = netdev_priv(netdev);
576
577 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
578 }
579
580 /*
581 * atl1c_mii_ioctl -
582 * @netdev:
583 * @ifreq:
584 * @cmd:
585 */
586 static int atl1c_mii_ioctl(struct net_device *netdev,
587 struct ifreq *ifr, int cmd)
588 {
589 struct atl1c_adapter *adapter = netdev_priv(netdev);
590 struct pci_dev *pdev = adapter->pdev;
591 struct mii_ioctl_data *data = if_mii(ifr);
592 unsigned long flags;
593 int retval = 0;
594
595 if (!netif_running(netdev))
596 return -EINVAL;
597
598 spin_lock_irqsave(&adapter->mdio_lock, flags);
599 switch (cmd) {
600 case SIOCGMIIPHY:
601 data->phy_id = 0;
602 break;
603
604 case SIOCGMIIREG:
605 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
606 &data->val_out)) {
607 retval = -EIO;
608 goto out;
609 }
610 break;
611
612 case SIOCSMIIREG:
613 if (data->reg_num & ~(0x1F)) {
614 retval = -EFAULT;
615 goto out;
616 }
617
618 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
619 data->reg_num, data->val_in);
620 if (atl1c_write_phy_reg(&adapter->hw,
621 data->reg_num, data->val_in)) {
622 retval = -EIO;
623 goto out;
624 }
625 break;
626
627 default:
628 retval = -EOPNOTSUPP;
629 break;
630 }
631 out:
632 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
633 return retval;
634 }
635
636 /*
637 * atl1c_ioctl -
638 * @netdev:
639 * @ifreq:
640 * @cmd:
641 */
642 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
643 {
644 switch (cmd) {
645 case SIOCGMIIPHY:
646 case SIOCGMIIREG:
647 case SIOCSMIIREG:
648 return atl1c_mii_ioctl(netdev, ifr, cmd);
649 default:
650 return -EOPNOTSUPP;
651 }
652 }
653
654 /*
655 * atl1c_alloc_queues - Allocate memory for all rings
656 * @adapter: board private structure to initialize
657 *
658 */
659 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
660 {
661 return 0;
662 }
663
664 static void atl1c_set_mac_type(struct atl1c_hw *hw)
665 {
666 switch (hw->device_id) {
667 case PCI_DEVICE_ID_ATTANSIC_L2C:
668 hw->nic_type = athr_l2c;
669 break;
670 case PCI_DEVICE_ID_ATTANSIC_L1C:
671 hw->nic_type = athr_l1c;
672 break;
673 case PCI_DEVICE_ID_ATHEROS_L2C_B:
674 hw->nic_type = athr_l2c_b;
675 break;
676 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
677 hw->nic_type = athr_l2c_b2;
678 break;
679 case PCI_DEVICE_ID_ATHEROS_L1D:
680 hw->nic_type = athr_l1d;
681 break;
682 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
683 hw->nic_type = athr_l1d_2;
684 break;
685 default:
686 break;
687 }
688 }
689
690 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
691 {
692 u32 link_ctrl_data;
693
694 atl1c_set_mac_type(hw);
695 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
696
697 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
698 ATL1C_TXQ_MODE_ENHANCE;
699 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
700 ATL1C_ASPM_L1_SUPPORT;
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 struct atl1c_platform_patch {
711 u16 pci_did;
712 u8 pci_revid;
713 u16 subsystem_vid;
714 u16 subsystem_did;
715 u32 patch_flag;
716 #define ATL1C_LINK_PATCH 0x1
717 };
718 static const struct atl1c_platform_patch plats[] __devinitdata = {
719 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
720 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
721 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
722 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
723 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
724 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
725 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
726 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
727 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
728 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
729 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
730 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
731 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
732 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
733 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
734 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
735 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
736 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
737 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
738 {0},
739 };
740
741 static void __devinit atl1c_patch_assign(struct atl1c_hw *hw)
742 {
743 int i = 0;
744
745 hw->msi_lnkpatch = false;
746
747 while (plats[i].pci_did != 0) {
748 if (plats[i].pci_did == hw->device_id &&
749 plats[i].pci_revid == hw->revision_id &&
750 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
751 plats[i].subsystem_did == hw->subsystem_id) {
752 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
753 hw->msi_lnkpatch = true;
754 }
755 i++;
756 }
757 }
758 /*
759 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
760 * @adapter: board private structure to initialize
761 *
762 * atl1c_sw_init initializes the Adapter private data structure.
763 * Fields are initialized based on PCI device information and
764 * OS network device settings (MTU size).
765 */
766 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
767 {
768 struct atl1c_hw *hw = &adapter->hw;
769 struct pci_dev *pdev = adapter->pdev;
770 u32 revision;
771
772
773 adapter->wol = 0;
774 device_set_wakeup_enable(&pdev->dev, false);
775 adapter->link_speed = SPEED_0;
776 adapter->link_duplex = FULL_DUPLEX;
777 adapter->tpd_ring[0].count = 1024;
778 adapter->rfd_ring.count = 512;
779
780 hw->vendor_id = pdev->vendor;
781 hw->device_id = pdev->device;
782 hw->subsystem_vendor_id = pdev->subsystem_vendor;
783 hw->subsystem_id = pdev->subsystem_device;
784 AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
785 hw->revision_id = revision & 0xFF;
786 /* before link up, we assume hibernate is true */
787 hw->hibernate = true;
788 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
789 if (atl1c_setup_mac_funcs(hw) != 0) {
790 dev_err(&pdev->dev, "set mac function pointers failed\n");
791 return -1;
792 }
793 atl1c_patch_assign(hw);
794
795 hw->intr_mask = IMR_NORMAL_MASK;
796 hw->phy_configured = false;
797 hw->preamble_len = 7;
798 hw->max_frame_size = adapter->netdev->mtu;
799 hw->autoneg_advertised = ADVERTISED_Autoneg;
800 hw->indirect_tab = 0xE4E4E4E4;
801 hw->base_cpu = 0;
802
803 hw->ict = 50000; /* 100ms */
804 hw->smb_timer = 200000; /* 400ms */
805 hw->rx_imt = 200;
806 hw->tx_imt = 1000;
807
808 hw->tpd_burst = 5;
809 hw->rfd_burst = 8;
810 hw->dma_order = atl1c_dma_ord_out;
811 hw->dmar_block = atl1c_dma_req_1024;
812
813 if (atl1c_alloc_queues(adapter)) {
814 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
815 return -ENOMEM;
816 }
817 /* TODO */
818 atl1c_set_rxbufsize(adapter, adapter->netdev);
819 atomic_set(&adapter->irq_sem, 1);
820 spin_lock_init(&adapter->mdio_lock);
821 spin_lock_init(&adapter->tx_lock);
822 set_bit(__AT_DOWN, &adapter->flags);
823
824 return 0;
825 }
826
827 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
828 struct atl1c_buffer *buffer_info, int in_irq)
829 {
830 u16 pci_driection;
831 if (buffer_info->flags & ATL1C_BUFFER_FREE)
832 return;
833 if (buffer_info->dma) {
834 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
835 pci_driection = PCI_DMA_FROMDEVICE;
836 else
837 pci_driection = PCI_DMA_TODEVICE;
838
839 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
840 pci_unmap_single(pdev, buffer_info->dma,
841 buffer_info->length, pci_driection);
842 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
843 pci_unmap_page(pdev, buffer_info->dma,
844 buffer_info->length, pci_driection);
845 }
846 if (buffer_info->skb) {
847 if (in_irq)
848 dev_kfree_skb_irq(buffer_info->skb);
849 else
850 dev_kfree_skb(buffer_info->skb);
851 }
852 buffer_info->dma = 0;
853 buffer_info->skb = NULL;
854 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
855 }
856 /*
857 * atl1c_clean_tx_ring - Free Tx-skb
858 * @adapter: board private structure
859 */
860 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
861 enum atl1c_trans_queue type)
862 {
863 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
864 struct atl1c_buffer *buffer_info;
865 struct pci_dev *pdev = adapter->pdev;
866 u16 index, ring_count;
867
868 ring_count = tpd_ring->count;
869 for (index = 0; index < ring_count; index++) {
870 buffer_info = &tpd_ring->buffer_info[index];
871 atl1c_clean_buffer(pdev, buffer_info, 0);
872 }
873
874 /* Zero out Tx-buffers */
875 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
876 ring_count);
877 atomic_set(&tpd_ring->next_to_clean, 0);
878 tpd_ring->next_to_use = 0;
879 }
880
881 /*
882 * atl1c_clean_rx_ring - Free rx-reservation skbs
883 * @adapter: board private structure
884 */
885 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
886 {
887 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
888 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
889 struct atl1c_buffer *buffer_info;
890 struct pci_dev *pdev = adapter->pdev;
891 int j;
892
893 for (j = 0; j < rfd_ring->count; j++) {
894 buffer_info = &rfd_ring->buffer_info[j];
895 atl1c_clean_buffer(pdev, buffer_info, 0);
896 }
897 /* zero out the descriptor ring */
898 memset(rfd_ring->desc, 0, rfd_ring->size);
899 rfd_ring->next_to_clean = 0;
900 rfd_ring->next_to_use = 0;
901 rrd_ring->next_to_use = 0;
902 rrd_ring->next_to_clean = 0;
903 }
904
905 /*
906 * Read / Write Ptr Initialize:
907 */
908 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
909 {
910 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
911 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
912 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
913 struct atl1c_buffer *buffer_info;
914 int i, j;
915
916 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
917 tpd_ring[i].next_to_use = 0;
918 atomic_set(&tpd_ring[i].next_to_clean, 0);
919 buffer_info = tpd_ring[i].buffer_info;
920 for (j = 0; j < tpd_ring->count; j++)
921 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
922 ATL1C_BUFFER_FREE);
923 }
924 rfd_ring->next_to_use = 0;
925 rfd_ring->next_to_clean = 0;
926 rrd_ring->next_to_use = 0;
927 rrd_ring->next_to_clean = 0;
928 for (j = 0; j < rfd_ring->count; j++) {
929 buffer_info = &rfd_ring->buffer_info[j];
930 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
931 }
932 }
933
934 /*
935 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
936 * @adapter: board private structure
937 *
938 * Free all transmit software resources
939 */
940 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
941 {
942 struct pci_dev *pdev = adapter->pdev;
943
944 pci_free_consistent(pdev, adapter->ring_header.size,
945 adapter->ring_header.desc,
946 adapter->ring_header.dma);
947 adapter->ring_header.desc = NULL;
948
949 /* Note: just free tdp_ring.buffer_info,
950 * it contain rfd_ring.buffer_info, do not double free */
951 if (adapter->tpd_ring[0].buffer_info) {
952 kfree(adapter->tpd_ring[0].buffer_info);
953 adapter->tpd_ring[0].buffer_info = NULL;
954 }
955 }
956
957 /*
958 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
959 * @adapter: board private structure
960 *
961 * Return 0 on success, negative on failure
962 */
963 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
964 {
965 struct pci_dev *pdev = adapter->pdev;
966 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
967 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
968 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
969 struct atl1c_ring_header *ring_header = &adapter->ring_header;
970 int size;
971 int i;
972 int count = 0;
973 int rx_desc_count = 0;
974 u32 offset = 0;
975
976 rrd_ring->count = rfd_ring->count;
977 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
978 tpd_ring[i].count = tpd_ring[0].count;
979
980 /* 2 tpd queue, one high priority queue,
981 * another normal priority queue */
982 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
983 rfd_ring->count);
984 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
985 if (unlikely(!tpd_ring->buffer_info)) {
986 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
987 size);
988 goto err_nomem;
989 }
990 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
991 tpd_ring[i].buffer_info =
992 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
993 count += tpd_ring[i].count;
994 }
995
996 rfd_ring->buffer_info =
997 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
998 count += rfd_ring->count;
999 rx_desc_count += rfd_ring->count;
1000
1001 /*
1002 * real ring DMA buffer
1003 * each ring/block may need up to 8 bytes for alignment, hence the
1004 * additional bytes tacked onto the end.
1005 */
1006 ring_header->size = size =
1007 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1008 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1009 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1010 8 * 4;
1011
1012 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1013 &ring_header->dma);
1014 if (unlikely(!ring_header->desc)) {
1015 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1016 goto err_nomem;
1017 }
1018 memset(ring_header->desc, 0, ring_header->size);
1019 /* init TPD ring */
1020
1021 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1022 offset = tpd_ring[0].dma - ring_header->dma;
1023 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1024 tpd_ring[i].dma = ring_header->dma + offset;
1025 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1026 tpd_ring[i].size =
1027 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1028 offset += roundup(tpd_ring[i].size, 8);
1029 }
1030 /* init RFD ring */
1031 rfd_ring->dma = ring_header->dma + offset;
1032 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1033 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1034 offset += roundup(rfd_ring->size, 8);
1035
1036 /* init RRD ring */
1037 rrd_ring->dma = ring_header->dma + offset;
1038 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1039 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1040 rrd_ring->count;
1041 offset += roundup(rrd_ring->size, 8);
1042
1043 return 0;
1044
1045 err_nomem:
1046 kfree(tpd_ring->buffer_info);
1047 return -ENOMEM;
1048 }
1049
1050 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1051 {
1052 struct atl1c_hw *hw = &adapter->hw;
1053 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1054 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1055 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1056 adapter->tpd_ring;
1057
1058 /* TPD */
1059 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1060 (u32)((tpd_ring[atl1c_trans_normal].dma &
1061 AT_DMA_HI_ADDR_MASK) >> 32));
1062 /* just enable normal priority TX queue */
1063 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1064 (u32)(tpd_ring[atl1c_trans_normal].dma &
1065 AT_DMA_LO_ADDR_MASK));
1066 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1067 (u32)(tpd_ring[atl1c_trans_high].dma &
1068 AT_DMA_LO_ADDR_MASK));
1069 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1070 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1071
1072
1073 /* RFD */
1074 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1075 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1076 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1077 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1078
1079 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1080 rfd_ring->count & RFD_RING_SIZE_MASK);
1081 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1082 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1083
1084 /* RRD */
1085 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1086 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1087 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1088 (rrd_ring->count & RRD_RING_SIZE_MASK));
1089
1090 if (hw->nic_type == athr_l2c_b) {
1091 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1092 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1093 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1094 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1095 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1096 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1097 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1098 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1099 }
1100 /* Load all of base address above */
1101 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1102 }
1103
1104 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1105 {
1106 struct atl1c_hw *hw = &adapter->hw;
1107 int max_pay_load;
1108 u16 tx_offload_thresh;
1109 u32 txq_ctrl_data;
1110
1111 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1112 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1113 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1114 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1115 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1116 /*
1117 * if BIOS had changed the dam-read-max-length to an invalid value,
1118 * restore it to default value
1119 */
1120 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1121 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1122 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1123 }
1124 txq_ctrl_data =
1125 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1126 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1127
1128 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1129 }
1130
1131 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1132 {
1133 struct atl1c_hw *hw = &adapter->hw;
1134 u32 rxq_ctrl_data;
1135
1136 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1137 RXQ_RFD_BURST_NUM_SHIFT;
1138
1139 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1140 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1141
1142 /* aspm for gigabit */
1143 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1144 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1145 ASPM_THRUPUT_LIMIT_100M);
1146
1147 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1148 }
1149
1150 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1151 {
1152 struct atl1c_hw *hw = &adapter->hw;
1153 u32 dma_ctrl_data;
1154
1155 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1156 DMA_CTRL_RREQ_PRI_DATA |
1157 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1158 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1159 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1160
1161 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1162 }
1163
1164 /*
1165 * Stop the mac, transmit and receive units
1166 * hw - Struct containing variables accessed by shared code
1167 * return : 0 or idle status (if error)
1168 */
1169 static int atl1c_stop_mac(struct atl1c_hw *hw)
1170 {
1171 u32 data;
1172
1173 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1174 data &= ~RXQ_CTRL_EN;
1175 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1176
1177 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1178 data &= ~TXQ_CTRL_EN;
1179 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1180
1181 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1182
1183 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1184 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1185 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1186
1187 return (int)atl1c_wait_until_idle(hw,
1188 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1189 }
1190
1191 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1192 {
1193 struct atl1c_hw *hw = &adapter->hw;
1194 u32 mac, txq, rxq;
1195
1196 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1197 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1198 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1199
1200 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1201 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1202 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1203
1204 txq |= TXQ_CTRL_EN;
1205 rxq |= RXQ_CTRL_EN;
1206 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1207 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1208 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1209 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1210 MAC_CTRL_HASH_ALG_CRC32;
1211 if (hw->mac_duplex)
1212 mac |= MAC_CTRL_DUPLX;
1213 else
1214 mac &= ~MAC_CTRL_DUPLX;
1215 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1216 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1217
1218 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1219 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1220 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1221 }
1222
1223 /*
1224 * Reset the transmit and receive units; mask and clear all interrupts.
1225 * hw - Struct containing variables accessed by shared code
1226 * return : 0 or idle status (if error)
1227 */
1228 static int atl1c_reset_mac(struct atl1c_hw *hw)
1229 {
1230 struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1231 struct pci_dev *pdev = adapter->pdev;
1232 u32 ctrl_data = 0;
1233
1234 atl1c_stop_mac(hw);
1235 /*
1236 * Issue Soft Reset to the MAC. This will reset the chip's
1237 * transmit, receive, DMA. It will not effect
1238 * the current PCI configuration. The global reset bit is self-
1239 * clearing, and should clear within a microsecond.
1240 */
1241 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1242 ctrl_data |= MASTER_CTRL_OOB_DIS;
1243 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1244
1245 AT_WRITE_FLUSH(hw);
1246 msleep(10);
1247 /* Wait at least 10ms for All module to be Idle */
1248
1249 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1250 dev_err(&pdev->dev,
1251 "MAC state machine can't be idle since"
1252 " disabled for 10ms second\n");
1253 return -1;
1254 }
1255 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1256
1257 /* driver control speed/duplex */
1258 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1259 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1260
1261 /* clk switch setting */
1262 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1263 switch (hw->nic_type) {
1264 case athr_l2c_b:
1265 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1266 SERDES_MAC_CLK_SLOWDOWN);
1267 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1268 break;
1269 case athr_l2c_b2:
1270 case athr_l1d_2:
1271 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1272 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1273 break;
1274 default:
1275 break;
1276 }
1277
1278 return 0;
1279 }
1280
1281 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1282 {
1283 u16 ctrl_flags = hw->ctrl_flags;
1284
1285 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1286 atl1c_set_aspm(hw, SPEED_0);
1287 hw->ctrl_flags = ctrl_flags;
1288 }
1289
1290 /*
1291 * Set ASPM state.
1292 * Enable/disable L0s/L1 depend on link state.
1293 */
1294 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1295 {
1296 u32 pm_ctrl_data;
1297 u32 link_l1_timer;
1298
1299 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1300 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1301 PM_CTRL_ASPM_L0S_EN |
1302 PM_CTRL_MAC_ASPM_CHK);
1303 /* L1 timer */
1304 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1305 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1306 link_l1_timer =
1307 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1308 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1309 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1310 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1311 } else {
1312 link_l1_timer = hw->nic_type == athr_l2c_b ?
1313 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1314 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1315 link_l1_timer = 1;
1316 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1317 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1318 }
1319
1320 /* L0S/L1 enable */
1321 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1322 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1323 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1324 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1325
1326 /* l2cb & l1d & l2cb2 & l1d2 */
1327 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1328 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1329 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1330 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1331 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1332 PM_CTRL_SERDES_PD_EX_L1 |
1333 PM_CTRL_CLK_SWH_L1;
1334 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1335 PM_CTRL_SERDES_PLL_L1_EN |
1336 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1337 PM_CTRL_SA_DLY_EN |
1338 PM_CTRL_HOTRST);
1339 /* disable l0s if link down or l2cb */
1340 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1341 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1342 } else { /* l1c */
1343 pm_ctrl_data =
1344 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1345 if (link_speed != SPEED_0) {
1346 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1347 PM_CTRL_SERDES_PLL_L1_EN |
1348 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1349 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1350 PM_CTRL_CLK_SWH_L1 |
1351 PM_CTRL_ASPM_L0S_EN |
1352 PM_CTRL_ASPM_L1_EN);
1353 } else { /* link down */
1354 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1355 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1356 PM_CTRL_SERDES_PLL_L1_EN |
1357 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1358 PM_CTRL_ASPM_L0S_EN);
1359 }
1360 }
1361 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1362
1363 return;
1364 }
1365
1366 /*
1367 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1368 * @adapter: board private structure
1369 *
1370 * Configure the Tx /Rx unit of the MAC after a reset.
1371 */
1372 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1373 {
1374 struct atl1c_hw *hw = &adapter->hw;
1375 u32 master_ctrl_data = 0;
1376 u32 intr_modrt_data;
1377 u32 data;
1378
1379 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1380 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1381 MASTER_CTRL_RX_ITIMER_EN |
1382 MASTER_CTRL_INT_RDCLR);
1383 /* clear interrupt status */
1384 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1385 /* Clear any WOL status */
1386 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1387 /* set Interrupt Clear Timer
1388 * HW will enable self to assert interrupt event to system after
1389 * waiting x-time for software to notify it accept interrupt.
1390 */
1391
1392 data = CLK_GATING_EN_ALL;
1393 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1394 if (hw->nic_type == athr_l2c_b)
1395 data &= ~CLK_GATING_RXMAC_EN;
1396 } else
1397 data = 0;
1398 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1399
1400 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1401 hw->ict & INT_RETRIG_TIMER_MASK);
1402
1403 atl1c_configure_des_ring(adapter);
1404
1405 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1406 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1407 IRQ_MODRT_TX_TIMER_SHIFT;
1408 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1409 IRQ_MODRT_RX_TIMER_SHIFT;
1410 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1411 master_ctrl_data |=
1412 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1413 }
1414
1415 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1416 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1417
1418 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1419 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1420
1421 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1422 hw->smb_timer & SMB_STAT_TIMER_MASK);
1423
1424 /* set MTU */
1425 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1426 VLAN_HLEN + ETH_FCS_LEN);
1427
1428 atl1c_configure_tx(adapter);
1429 atl1c_configure_rx(adapter);
1430 atl1c_configure_dma(adapter);
1431
1432 return 0;
1433 }
1434
1435 static int atl1c_configure(struct atl1c_adapter *adapter)
1436 {
1437 struct net_device *netdev = adapter->netdev;
1438 int num;
1439
1440 atl1c_init_ring_ptrs(adapter);
1441 atl1c_set_multi(netdev);
1442 atl1c_restore_vlan(adapter);
1443
1444 num = atl1c_alloc_rx_buffer(adapter);
1445 if (unlikely(num == 0))
1446 return -ENOMEM;
1447
1448 if (atl1c_configure_mac(adapter))
1449 return -EIO;
1450
1451 return 0;
1452 }
1453
1454 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1455 {
1456 u16 hw_reg_addr = 0;
1457 unsigned long *stats_item = NULL;
1458 u32 data;
1459
1460 /* update rx status */
1461 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1462 stats_item = &adapter->hw_stats.rx_ok;
1463 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1464 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1465 *stats_item += data;
1466 stats_item++;
1467 hw_reg_addr += 4;
1468 }
1469 /* update tx status */
1470 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1471 stats_item = &adapter->hw_stats.tx_ok;
1472 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1473 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1474 *stats_item += data;
1475 stats_item++;
1476 hw_reg_addr += 4;
1477 }
1478 }
1479
1480 /*
1481 * atl1c_get_stats - Get System Network Statistics
1482 * @netdev: network interface device structure
1483 *
1484 * Returns the address of the device statistics structure.
1485 * The statistics are actually updated from the timer callback.
1486 */
1487 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1488 {
1489 struct atl1c_adapter *adapter = netdev_priv(netdev);
1490 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1491 struct net_device_stats *net_stats = &netdev->stats;
1492
1493 atl1c_update_hw_stats(adapter);
1494 net_stats->rx_packets = hw_stats->rx_ok;
1495 net_stats->tx_packets = hw_stats->tx_ok;
1496 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1497 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1498 net_stats->multicast = hw_stats->rx_mcast;
1499 net_stats->collisions = hw_stats->tx_1_col +
1500 hw_stats->tx_2_col * 2 +
1501 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1502 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1503 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1504 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1505 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1506 net_stats->rx_length_errors = hw_stats->rx_len_err;
1507 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1508 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1509 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1510
1511 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1512
1513 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1514 hw_stats->tx_underrun + hw_stats->tx_trunc;
1515 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1516 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1517 net_stats->tx_window_errors = hw_stats->tx_late_col;
1518
1519 return net_stats;
1520 }
1521
1522 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1523 {
1524 u16 phy_data;
1525
1526 spin_lock(&adapter->mdio_lock);
1527 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1528 spin_unlock(&adapter->mdio_lock);
1529 }
1530
1531 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1532 enum atl1c_trans_queue type)
1533 {
1534 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1535 &adapter->tpd_ring[type];
1536 struct atl1c_buffer *buffer_info;
1537 struct pci_dev *pdev = adapter->pdev;
1538 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1539 u16 hw_next_to_clean;
1540 u16 reg;
1541
1542 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1543
1544 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1545
1546 while (next_to_clean != hw_next_to_clean) {
1547 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1548 atl1c_clean_buffer(pdev, buffer_info, 1);
1549 if (++next_to_clean == tpd_ring->count)
1550 next_to_clean = 0;
1551 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1552 }
1553
1554 if (netif_queue_stopped(adapter->netdev) &&
1555 netif_carrier_ok(adapter->netdev)) {
1556 netif_wake_queue(adapter->netdev);
1557 }
1558
1559 return true;
1560 }
1561
1562 /*
1563 * atl1c_intr - Interrupt Handler
1564 * @irq: interrupt number
1565 * @data: pointer to a network interface device structure
1566 * @pt_regs: CPU registers structure
1567 */
1568 static irqreturn_t atl1c_intr(int irq, void *data)
1569 {
1570 struct net_device *netdev = data;
1571 struct atl1c_adapter *adapter = netdev_priv(netdev);
1572 struct pci_dev *pdev = adapter->pdev;
1573 struct atl1c_hw *hw = &adapter->hw;
1574 int max_ints = AT_MAX_INT_WORK;
1575 int handled = IRQ_NONE;
1576 u32 status;
1577 u32 reg_data;
1578
1579 do {
1580 AT_READ_REG(hw, REG_ISR, &reg_data);
1581 status = reg_data & hw->intr_mask;
1582
1583 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1584 if (max_ints != AT_MAX_INT_WORK)
1585 handled = IRQ_HANDLED;
1586 break;
1587 }
1588 /* link event */
1589 if (status & ISR_GPHY)
1590 atl1c_clear_phy_int(adapter);
1591 /* Ack ISR */
1592 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1593 if (status & ISR_RX_PKT) {
1594 if (likely(napi_schedule_prep(&adapter->napi))) {
1595 hw->intr_mask &= ~ISR_RX_PKT;
1596 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1597 __napi_schedule(&adapter->napi);
1598 }
1599 }
1600 if (status & ISR_TX_PKT)
1601 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1602
1603 handled = IRQ_HANDLED;
1604 /* check if PCIE PHY Link down */
1605 if (status & ISR_ERROR) {
1606 if (netif_msg_hw(adapter))
1607 dev_err(&pdev->dev,
1608 "atl1c hardware error (status = 0x%x)\n",
1609 status & ISR_ERROR);
1610 /* reset MAC */
1611 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1612 schedule_work(&adapter->common_task);
1613 return IRQ_HANDLED;
1614 }
1615
1616 if (status & ISR_OVER)
1617 if (netif_msg_intr(adapter))
1618 dev_warn(&pdev->dev,
1619 "TX/RX overflow (status = 0x%x)\n",
1620 status & ISR_OVER);
1621
1622 /* link event */
1623 if (status & (ISR_GPHY | ISR_MANUAL)) {
1624 netdev->stats.tx_carrier_errors++;
1625 atl1c_link_chg_event(adapter);
1626 break;
1627 }
1628
1629 } while (--max_ints > 0);
1630 /* re-enable Interrupt*/
1631 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1632 return handled;
1633 }
1634
1635 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1636 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1637 {
1638 /*
1639 * The pid field in RRS in not correct sometimes, so we
1640 * cannot figure out if the packet is fragmented or not,
1641 * so we tell the KERNEL CHECKSUM_NONE
1642 */
1643 skb_checksum_none_assert(skb);
1644 }
1645
1646 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1647 {
1648 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1649 struct pci_dev *pdev = adapter->pdev;
1650 struct atl1c_buffer *buffer_info, *next_info;
1651 struct sk_buff *skb;
1652 void *vir_addr = NULL;
1653 u16 num_alloc = 0;
1654 u16 rfd_next_to_use, next_next;
1655 struct atl1c_rx_free_desc *rfd_desc;
1656
1657 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1658 if (++next_next == rfd_ring->count)
1659 next_next = 0;
1660 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1661 next_info = &rfd_ring->buffer_info[next_next];
1662
1663 while (next_info->flags & ATL1C_BUFFER_FREE) {
1664 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1665
1666 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1667 if (unlikely(!skb)) {
1668 if (netif_msg_rx_err(adapter))
1669 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1670 break;
1671 }
1672
1673 /*
1674 * Make buffer alignment 2 beyond a 16 byte boundary
1675 * this will result in a 16 byte aligned IP header after
1676 * the 14 byte MAC header is removed
1677 */
1678 vir_addr = skb->data;
1679 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1680 buffer_info->skb = skb;
1681 buffer_info->length = adapter->rx_buffer_len;
1682 buffer_info->dma = pci_map_single(pdev, vir_addr,
1683 buffer_info->length,
1684 PCI_DMA_FROMDEVICE);
1685 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1686 ATL1C_PCIMAP_FROMDEVICE);
1687 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1688 rfd_next_to_use = next_next;
1689 if (++next_next == rfd_ring->count)
1690 next_next = 0;
1691 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1692 next_info = &rfd_ring->buffer_info[next_next];
1693 num_alloc++;
1694 }
1695
1696 if (num_alloc) {
1697 /* TODO: update mailbox here */
1698 wmb();
1699 rfd_ring->next_to_use = rfd_next_to_use;
1700 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1701 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1702 }
1703
1704 return num_alloc;
1705 }
1706
1707 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1708 struct atl1c_recv_ret_status *rrs, u16 num)
1709 {
1710 u16 i;
1711 /* the relationship between rrd and rfd is one map one */
1712 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1713 rrd_ring->next_to_clean)) {
1714 rrs->word3 &= ~RRS_RXD_UPDATED;
1715 if (++rrd_ring->next_to_clean == rrd_ring->count)
1716 rrd_ring->next_to_clean = 0;
1717 }
1718 }
1719
1720 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1721 struct atl1c_recv_ret_status *rrs, u16 num)
1722 {
1723 u16 i;
1724 u16 rfd_index;
1725 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1726
1727 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1728 RRS_RX_RFD_INDEX_MASK;
1729 for (i = 0; i < num; i++) {
1730 buffer_info[rfd_index].skb = NULL;
1731 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1732 ATL1C_BUFFER_FREE);
1733 if (++rfd_index == rfd_ring->count)
1734 rfd_index = 0;
1735 }
1736 rfd_ring->next_to_clean = rfd_index;
1737 }
1738
1739 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1740 int *work_done, int work_to_do)
1741 {
1742 u16 rfd_num, rfd_index;
1743 u16 count = 0;
1744 u16 length;
1745 struct pci_dev *pdev = adapter->pdev;
1746 struct net_device *netdev = adapter->netdev;
1747 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1748 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1749 struct sk_buff *skb;
1750 struct atl1c_recv_ret_status *rrs;
1751 struct atl1c_buffer *buffer_info;
1752
1753 while (1) {
1754 if (*work_done >= work_to_do)
1755 break;
1756 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1757 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1758 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1759 RRS_RX_RFD_CNT_MASK;
1760 if (unlikely(rfd_num != 1))
1761 /* TODO support mul rfd*/
1762 if (netif_msg_rx_err(adapter))
1763 dev_warn(&pdev->dev,
1764 "Multi rfd not support yet!\n");
1765 goto rrs_checked;
1766 } else {
1767 break;
1768 }
1769 rrs_checked:
1770 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1771 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1772 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1773 if (netif_msg_rx_err(adapter))
1774 dev_warn(&pdev->dev,
1775 "wrong packet! rrs word3 is %x\n",
1776 rrs->word3);
1777 continue;
1778 }
1779
1780 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1781 RRS_PKT_SIZE_MASK);
1782 /* Good Receive */
1783 if (likely(rfd_num == 1)) {
1784 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1785 RRS_RX_RFD_INDEX_MASK;
1786 buffer_info = &rfd_ring->buffer_info[rfd_index];
1787 pci_unmap_single(pdev, buffer_info->dma,
1788 buffer_info->length, PCI_DMA_FROMDEVICE);
1789 skb = buffer_info->skb;
1790 } else {
1791 /* TODO */
1792 if (netif_msg_rx_err(adapter))
1793 dev_warn(&pdev->dev,
1794 "Multi rfd not support yet!\n");
1795 break;
1796 }
1797 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1798 skb_put(skb, length - ETH_FCS_LEN);
1799 skb->protocol = eth_type_trans(skb, netdev);
1800 atl1c_rx_checksum(adapter, skb, rrs);
1801 if (rrs->word3 & RRS_VLAN_INS) {
1802 u16 vlan;
1803
1804 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1805 vlan = le16_to_cpu(vlan);
1806 __vlan_hwaccel_put_tag(skb, vlan);
1807 }
1808 netif_receive_skb(skb);
1809
1810 (*work_done)++;
1811 count++;
1812 }
1813 if (count)
1814 atl1c_alloc_rx_buffer(adapter);
1815 }
1816
1817 /*
1818 * atl1c_clean - NAPI Rx polling callback
1819 * @adapter: board private structure
1820 */
1821 static int atl1c_clean(struct napi_struct *napi, int budget)
1822 {
1823 struct atl1c_adapter *adapter =
1824 container_of(napi, struct atl1c_adapter, napi);
1825 int work_done = 0;
1826
1827 /* Keep link state information with original netdev */
1828 if (!netif_carrier_ok(adapter->netdev))
1829 goto quit_polling;
1830 /* just enable one RXQ */
1831 atl1c_clean_rx_irq(adapter, &work_done, budget);
1832
1833 if (work_done < budget) {
1834 quit_polling:
1835 napi_complete(napi);
1836 adapter->hw.intr_mask |= ISR_RX_PKT;
1837 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1838 }
1839 return work_done;
1840 }
1841
1842 #ifdef CONFIG_NET_POLL_CONTROLLER
1843
1844 /*
1845 * Polling 'interrupt' - used by things like netconsole to send skbs
1846 * without having to re-enable interrupts. It's not called while
1847 * the interrupt routine is executing.
1848 */
1849 static void atl1c_netpoll(struct net_device *netdev)
1850 {
1851 struct atl1c_adapter *adapter = netdev_priv(netdev);
1852
1853 disable_irq(adapter->pdev->irq);
1854 atl1c_intr(adapter->pdev->irq, netdev);
1855 enable_irq(adapter->pdev->irq);
1856 }
1857 #endif
1858
1859 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1860 {
1861 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1862 u16 next_to_use = 0;
1863 u16 next_to_clean = 0;
1864
1865 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1866 next_to_use = tpd_ring->next_to_use;
1867
1868 return (u16)(next_to_clean > next_to_use) ?
1869 (next_to_clean - next_to_use - 1) :
1870 (tpd_ring->count + next_to_clean - next_to_use - 1);
1871 }
1872
1873 /*
1874 * get next usable tpd
1875 * Note: should call atl1c_tdp_avail to make sure
1876 * there is enough tpd to use
1877 */
1878 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1879 enum atl1c_trans_queue type)
1880 {
1881 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1882 struct atl1c_tpd_desc *tpd_desc;
1883 u16 next_to_use = 0;
1884
1885 next_to_use = tpd_ring->next_to_use;
1886 if (++tpd_ring->next_to_use == tpd_ring->count)
1887 tpd_ring->next_to_use = 0;
1888 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1889 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1890 return tpd_desc;
1891 }
1892
1893 static struct atl1c_buffer *
1894 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1895 {
1896 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1897
1898 return &tpd_ring->buffer_info[tpd -
1899 (struct atl1c_tpd_desc *)tpd_ring->desc];
1900 }
1901
1902 /* Calculate the transmit packet descript needed*/
1903 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1904 {
1905 u16 tpd_req;
1906 u16 proto_hdr_len = 0;
1907
1908 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1909
1910 if (skb_is_gso(skb)) {
1911 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1912 if (proto_hdr_len < skb_headlen(skb))
1913 tpd_req++;
1914 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1915 tpd_req++;
1916 }
1917 return tpd_req;
1918 }
1919
1920 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1921 struct sk_buff *skb,
1922 struct atl1c_tpd_desc **tpd,
1923 enum atl1c_trans_queue type)
1924 {
1925 struct pci_dev *pdev = adapter->pdev;
1926 u8 hdr_len;
1927 u32 real_len;
1928 unsigned short offload_type;
1929 int err;
1930
1931 if (skb_is_gso(skb)) {
1932 if (skb_header_cloned(skb)) {
1933 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1934 if (unlikely(err))
1935 return -1;
1936 }
1937 offload_type = skb_shinfo(skb)->gso_type;
1938
1939 if (offload_type & SKB_GSO_TCPV4) {
1940 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1941 + ntohs(ip_hdr(skb)->tot_len));
1942
1943 if (real_len < skb->len)
1944 pskb_trim(skb, real_len);
1945
1946 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1947 if (unlikely(skb->len == hdr_len)) {
1948 /* only xsum need */
1949 if (netif_msg_tx_queued(adapter))
1950 dev_warn(&pdev->dev,
1951 "IPV4 tso with zero data??\n");
1952 goto check_sum;
1953 } else {
1954 ip_hdr(skb)->check = 0;
1955 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1956 ip_hdr(skb)->saddr,
1957 ip_hdr(skb)->daddr,
1958 0, IPPROTO_TCP, 0);
1959 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1960 }
1961 }
1962
1963 if (offload_type & SKB_GSO_TCPV6) {
1964 struct atl1c_tpd_ext_desc *etpd =
1965 *(struct atl1c_tpd_ext_desc **)(tpd);
1966
1967 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1968 *tpd = atl1c_get_tpd(adapter, type);
1969 ipv6_hdr(skb)->payload_len = 0;
1970 /* check payload == 0 byte ? */
1971 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1972 if (unlikely(skb->len == hdr_len)) {
1973 /* only xsum need */
1974 if (netif_msg_tx_queued(adapter))
1975 dev_warn(&pdev->dev,
1976 "IPV6 tso with zero data??\n");
1977 goto check_sum;
1978 } else
1979 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1980 &ipv6_hdr(skb)->saddr,
1981 &ipv6_hdr(skb)->daddr,
1982 0, IPPROTO_TCP, 0);
1983 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1984 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1985 etpd->pkt_len = cpu_to_le32(skb->len);
1986 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1987 }
1988
1989 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1990 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1991 TPD_TCPHDR_OFFSET_SHIFT;
1992 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1993 TPD_MSS_SHIFT;
1994 return 0;
1995 }
1996
1997 check_sum:
1998 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1999 u8 css, cso;
2000 cso = skb_checksum_start_offset(skb);
2001
2002 if (unlikely(cso & 0x1)) {
2003 if (netif_msg_tx_err(adapter))
2004 dev_err(&adapter->pdev->dev,
2005 "payload offset should not an event number\n");
2006 return -1;
2007 } else {
2008 css = cso + skb->csum_offset;
2009
2010 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2011 TPD_PLOADOFFSET_SHIFT;
2012 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2013 TPD_CCSUM_OFFSET_SHIFT;
2014 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2015 }
2016 }
2017 return 0;
2018 }
2019
2020 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2021 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2022 enum atl1c_trans_queue type)
2023 {
2024 struct atl1c_tpd_desc *use_tpd = NULL;
2025 struct atl1c_buffer *buffer_info = NULL;
2026 u16 buf_len = skb_headlen(skb);
2027 u16 map_len = 0;
2028 u16 mapped_len = 0;
2029 u16 hdr_len = 0;
2030 u16 nr_frags;
2031 u16 f;
2032 int tso;
2033
2034 nr_frags = skb_shinfo(skb)->nr_frags;
2035 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2036 if (tso) {
2037 /* TSO */
2038 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2039 use_tpd = tpd;
2040
2041 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2042 buffer_info->length = map_len;
2043 buffer_info->dma = pci_map_single(adapter->pdev,
2044 skb->data, hdr_len, PCI_DMA_TODEVICE);
2045 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2046 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2047 ATL1C_PCIMAP_TODEVICE);
2048 mapped_len += map_len;
2049 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2050 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2051 }
2052
2053 if (mapped_len < buf_len) {
2054 /* mapped_len == 0, means we should use the first tpd,
2055 which is given by caller */
2056 if (mapped_len == 0)
2057 use_tpd = tpd;
2058 else {
2059 use_tpd = atl1c_get_tpd(adapter, type);
2060 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2061 }
2062 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2063 buffer_info->length = buf_len - mapped_len;
2064 buffer_info->dma =
2065 pci_map_single(adapter->pdev, skb->data + mapped_len,
2066 buffer_info->length, PCI_DMA_TODEVICE);
2067 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2068 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2069 ATL1C_PCIMAP_TODEVICE);
2070 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2071 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2072 }
2073
2074 for (f = 0; f < nr_frags; f++) {
2075 struct skb_frag_struct *frag;
2076
2077 frag = &skb_shinfo(skb)->frags[f];
2078
2079 use_tpd = atl1c_get_tpd(adapter, type);
2080 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2081
2082 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2083 buffer_info->length = skb_frag_size(frag);
2084 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2085 frag, 0,
2086 buffer_info->length,
2087 DMA_TO_DEVICE);
2088 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2089 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2090 ATL1C_PCIMAP_TODEVICE);
2091 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2092 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2093 }
2094
2095 /* The last tpd */
2096 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2097 /* The last buffer info contain the skb address,
2098 so it will be free after unmap */
2099 buffer_info->skb = skb;
2100 }
2101
2102 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2103 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2104 {
2105 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2106 u16 reg;
2107
2108 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2109 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2110 }
2111
2112 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2113 struct net_device *netdev)
2114 {
2115 struct atl1c_adapter *adapter = netdev_priv(netdev);
2116 unsigned long flags;
2117 u16 tpd_req = 1;
2118 struct atl1c_tpd_desc *tpd;
2119 enum atl1c_trans_queue type = atl1c_trans_normal;
2120
2121 if (test_bit(__AT_DOWN, &adapter->flags)) {
2122 dev_kfree_skb_any(skb);
2123 return NETDEV_TX_OK;
2124 }
2125
2126 tpd_req = atl1c_cal_tpd_req(skb);
2127 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2128 if (netif_msg_pktdata(adapter))
2129 dev_info(&adapter->pdev->dev, "tx locked\n");
2130 return NETDEV_TX_LOCKED;
2131 }
2132
2133 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2134 /* no enough descriptor, just stop queue */
2135 netif_stop_queue(netdev);
2136 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2137 return NETDEV_TX_BUSY;
2138 }
2139
2140 tpd = atl1c_get_tpd(adapter, type);
2141
2142 /* do TSO and check sum */
2143 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2144 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2145 dev_kfree_skb_any(skb);
2146 return NETDEV_TX_OK;
2147 }
2148
2149 if (unlikely(vlan_tx_tag_present(skb))) {
2150 u16 vlan = vlan_tx_tag_get(skb);
2151 __le16 tag;
2152
2153 vlan = cpu_to_le16(vlan);
2154 AT_VLAN_TO_TAG(vlan, tag);
2155 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2156 tpd->vlan_tag = tag;
2157 }
2158
2159 if (skb_network_offset(skb) != ETH_HLEN)
2160 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2161
2162 atl1c_tx_map(adapter, skb, tpd, type);
2163 atl1c_tx_queue(adapter, skb, tpd, type);
2164
2165 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2166 return NETDEV_TX_OK;
2167 }
2168
2169 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2170 {
2171 struct net_device *netdev = adapter->netdev;
2172
2173 free_irq(adapter->pdev->irq, netdev);
2174
2175 if (adapter->have_msi)
2176 pci_disable_msi(adapter->pdev);
2177 }
2178
2179 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2180 {
2181 struct pci_dev *pdev = adapter->pdev;
2182 struct net_device *netdev = adapter->netdev;
2183 int flags = 0;
2184 int err = 0;
2185
2186 adapter->have_msi = true;
2187 err = pci_enable_msi(adapter->pdev);
2188 if (err) {
2189 if (netif_msg_ifup(adapter))
2190 dev_err(&pdev->dev,
2191 "Unable to allocate MSI interrupt Error: %d\n",
2192 err);
2193 adapter->have_msi = false;
2194 }
2195
2196 if (!adapter->have_msi)
2197 flags |= IRQF_SHARED;
2198 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2199 netdev->name, netdev);
2200 if (err) {
2201 if (netif_msg_ifup(adapter))
2202 dev_err(&pdev->dev,
2203 "Unable to allocate interrupt Error: %d\n",
2204 err);
2205 if (adapter->have_msi)
2206 pci_disable_msi(adapter->pdev);
2207 return err;
2208 }
2209 if (netif_msg_ifup(adapter))
2210 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2211 return err;
2212 }
2213
2214
2215 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2216 {
2217 /* release tx-pending skbs and reset tx/rx ring index */
2218 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2219 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2220 atl1c_clean_rx_ring(adapter);
2221 }
2222
2223 static int atl1c_up(struct atl1c_adapter *adapter)
2224 {
2225 struct net_device *netdev = adapter->netdev;
2226 int err;
2227
2228 netif_carrier_off(netdev);
2229
2230 err = atl1c_configure(adapter);
2231 if (unlikely(err))
2232 goto err_up;
2233
2234 err = atl1c_request_irq(adapter);
2235 if (unlikely(err))
2236 goto err_up;
2237
2238 atl1c_check_link_status(adapter);
2239 clear_bit(__AT_DOWN, &adapter->flags);
2240 napi_enable(&adapter->napi);
2241 atl1c_irq_enable(adapter);
2242 netif_start_queue(netdev);
2243 return err;
2244
2245 err_up:
2246 atl1c_clean_rx_ring(adapter);
2247 return err;
2248 }
2249
2250 static void atl1c_down(struct atl1c_adapter *adapter)
2251 {
2252 struct net_device *netdev = adapter->netdev;
2253
2254 atl1c_del_timer(adapter);
2255 adapter->work_event = 0; /* clear all event */
2256 /* signal that we're down so the interrupt handler does not
2257 * reschedule our watchdog timer */
2258 set_bit(__AT_DOWN, &adapter->flags);
2259 netif_carrier_off(netdev);
2260 napi_disable(&adapter->napi);
2261 atl1c_irq_disable(adapter);
2262 atl1c_free_irq(adapter);
2263 /* disable ASPM if device inactive */
2264 atl1c_disable_l0s_l1(&adapter->hw);
2265 /* reset MAC to disable all RX/TX */
2266 atl1c_reset_mac(&adapter->hw);
2267 msleep(1);
2268
2269 adapter->link_speed = SPEED_0;
2270 adapter->link_duplex = -1;
2271 atl1c_reset_dma_ring(adapter);
2272 }
2273
2274 /*
2275 * atl1c_open - Called when a network interface is made active
2276 * @netdev: network interface device structure
2277 *
2278 * Returns 0 on success, negative value on failure
2279 *
2280 * The open entry point is called when a network interface is made
2281 * active by the system (IFF_UP). At this point all resources needed
2282 * for transmit and receive operations are allocated, the interrupt
2283 * handler is registered with the OS, the watchdog timer is started,
2284 * and the stack is notified that the interface is ready.
2285 */
2286 static int atl1c_open(struct net_device *netdev)
2287 {
2288 struct atl1c_adapter *adapter = netdev_priv(netdev);
2289 int err;
2290
2291 /* disallow open during test */
2292 if (test_bit(__AT_TESTING, &adapter->flags))
2293 return -EBUSY;
2294
2295 /* allocate rx/tx dma buffer & descriptors */
2296 err = atl1c_setup_ring_resources(adapter);
2297 if (unlikely(err))
2298 return err;
2299
2300 err = atl1c_up(adapter);
2301 if (unlikely(err))
2302 goto err_up;
2303
2304 return 0;
2305
2306 err_up:
2307 atl1c_free_irq(adapter);
2308 atl1c_free_ring_resources(adapter);
2309 atl1c_reset_mac(&adapter->hw);
2310 return err;
2311 }
2312
2313 /*
2314 * atl1c_close - Disables a network interface
2315 * @netdev: network interface device structure
2316 *
2317 * Returns 0, this is not allowed to fail
2318 *
2319 * The close entry point is called when an interface is de-activated
2320 * by the OS. The hardware is still under the drivers control, but
2321 * needs to be disabled. A global MAC reset is issued to stop the
2322 * hardware, and all transmit and receive resources are freed.
2323 */
2324 static int atl1c_close(struct net_device *netdev)
2325 {
2326 struct atl1c_adapter *adapter = netdev_priv(netdev);
2327
2328 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2329 set_bit(__AT_DOWN, &adapter->flags);
2330 cancel_work_sync(&adapter->common_task);
2331 atl1c_down(adapter);
2332 atl1c_free_ring_resources(adapter);
2333 return 0;
2334 }
2335
2336 static int atl1c_suspend(struct device *dev)
2337 {
2338 struct pci_dev *pdev = to_pci_dev(dev);
2339 struct net_device *netdev = pci_get_drvdata(pdev);
2340 struct atl1c_adapter *adapter = netdev_priv(netdev);
2341 struct atl1c_hw *hw = &adapter->hw;
2342 u32 wufc = adapter->wol;
2343
2344 atl1c_disable_l0s_l1(hw);
2345 if (netif_running(netdev)) {
2346 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2347 atl1c_down(adapter);
2348 }
2349 netif_device_detach(netdev);
2350
2351 if (wufc)
2352 if (atl1c_phy_to_ps_link(hw) != 0)
2353 dev_dbg(&pdev->dev, "phy power saving failed");
2354
2355 atl1c_power_saving(hw, wufc);
2356
2357 return 0;
2358 }
2359
2360 #ifdef CONFIG_PM_SLEEP
2361 static int atl1c_resume(struct device *dev)
2362 {
2363 struct pci_dev *pdev = to_pci_dev(dev);
2364 struct net_device *netdev = pci_get_drvdata(pdev);
2365 struct atl1c_adapter *adapter = netdev_priv(netdev);
2366
2367 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2368 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2369
2370 atl1c_phy_reset(&adapter->hw);
2371 atl1c_reset_mac(&adapter->hw);
2372 atl1c_phy_init(&adapter->hw);
2373
2374 #if 0
2375 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2376 pm_data &= ~PM_CTRLSTAT_PME_EN;
2377 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2378 #endif
2379
2380 netif_device_attach(netdev);
2381 if (netif_running(netdev))
2382 atl1c_up(adapter);
2383
2384 return 0;
2385 }
2386 #endif
2387
2388 static void atl1c_shutdown(struct pci_dev *pdev)
2389 {
2390 struct net_device *netdev = pci_get_drvdata(pdev);
2391 struct atl1c_adapter *adapter = netdev_priv(netdev);
2392
2393 atl1c_suspend(&pdev->dev);
2394 pci_wake_from_d3(pdev, adapter->wol);
2395 pci_set_power_state(pdev, PCI_D3hot);
2396 }
2397
2398 static const struct net_device_ops atl1c_netdev_ops = {
2399 .ndo_open = atl1c_open,
2400 .ndo_stop = atl1c_close,
2401 .ndo_validate_addr = eth_validate_addr,
2402 .ndo_start_xmit = atl1c_xmit_frame,
2403 .ndo_set_mac_address = atl1c_set_mac_addr,
2404 .ndo_set_rx_mode = atl1c_set_multi,
2405 .ndo_change_mtu = atl1c_change_mtu,
2406 .ndo_fix_features = atl1c_fix_features,
2407 .ndo_set_features = atl1c_set_features,
2408 .ndo_do_ioctl = atl1c_ioctl,
2409 .ndo_tx_timeout = atl1c_tx_timeout,
2410 .ndo_get_stats = atl1c_get_stats,
2411 #ifdef CONFIG_NET_POLL_CONTROLLER
2412 .ndo_poll_controller = atl1c_netpoll,
2413 #endif
2414 };
2415
2416 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2417 {
2418 SET_NETDEV_DEV(netdev, &pdev->dev);
2419 pci_set_drvdata(pdev, netdev);
2420
2421 netdev->netdev_ops = &atl1c_netdev_ops;
2422 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2423 atl1c_set_ethtool_ops(netdev);
2424
2425 /* TODO: add when ready */
2426 netdev->hw_features = NETIF_F_SG |
2427 NETIF_F_HW_CSUM |
2428 NETIF_F_HW_VLAN_RX |
2429 NETIF_F_TSO |
2430 NETIF_F_TSO6;
2431 netdev->features = netdev->hw_features |
2432 NETIF_F_HW_VLAN_TX;
2433 return 0;
2434 }
2435
2436 /*
2437 * atl1c_probe - Device Initialization Routine
2438 * @pdev: PCI device information struct
2439 * @ent: entry in atl1c_pci_tbl
2440 *
2441 * Returns 0 on success, negative on failure
2442 *
2443 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2444 * The OS initialization, configuring of the adapter private structure,
2445 * and a hardware reset occur.
2446 */
2447 static int __devinit atl1c_probe(struct pci_dev *pdev,
2448 const struct pci_device_id *ent)
2449 {
2450 struct net_device *netdev;
2451 struct atl1c_adapter *adapter;
2452 static int cards_found;
2453
2454 int err = 0;
2455
2456 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2457 err = pci_enable_device_mem(pdev);
2458 if (err) {
2459 dev_err(&pdev->dev, "cannot enable PCI device\n");
2460 return err;
2461 }
2462
2463 /*
2464 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2465 * shared register for the high 32 bits, so only a single, aligned,
2466 * 4 GB physical address range can be used at a time.
2467 *
2468 * Supporting 64-bit DMA on this hardware is more trouble than it's
2469 * worth. It is far easier to limit to 32-bit DMA than update
2470 * various kernel subsystems to support the mechanics required by a
2471 * fixed-high-32-bit system.
2472 */
2473 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2474 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2475 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2476 goto err_dma;
2477 }
2478
2479 err = pci_request_regions(pdev, atl1c_driver_name);
2480 if (err) {
2481 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2482 goto err_pci_reg;
2483 }
2484
2485 pci_set_master(pdev);
2486
2487 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2488 if (netdev == NULL) {
2489 err = -ENOMEM;
2490 goto err_alloc_etherdev;
2491 }
2492
2493 err = atl1c_init_netdev(netdev, pdev);
2494 if (err) {
2495 dev_err(&pdev->dev, "init netdevice failed\n");
2496 goto err_init_netdev;
2497 }
2498 adapter = netdev_priv(netdev);
2499 adapter->bd_number = cards_found;
2500 adapter->netdev = netdev;
2501 adapter->pdev = pdev;
2502 adapter->hw.adapter = adapter;
2503 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2504 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2505 if (!adapter->hw.hw_addr) {
2506 err = -EIO;
2507 dev_err(&pdev->dev, "cannot map device registers\n");
2508 goto err_ioremap;
2509 }
2510
2511 /* init mii data */
2512 adapter->mii.dev = netdev;
2513 adapter->mii.mdio_read = atl1c_mdio_read;
2514 adapter->mii.mdio_write = atl1c_mdio_write;
2515 adapter->mii.phy_id_mask = 0x1f;
2516 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2517 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2518 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2519 (unsigned long)adapter);
2520 /* setup the private structure */
2521 err = atl1c_sw_init(adapter);
2522 if (err) {
2523 dev_err(&pdev->dev, "net device private data init failed\n");
2524 goto err_sw_init;
2525 }
2526 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2527
2528 /* Init GPHY as early as possible due to power saving issue */
2529 atl1c_phy_reset(&adapter->hw);
2530
2531 err = atl1c_reset_mac(&adapter->hw);
2532 if (err) {
2533 err = -EIO;
2534 goto err_reset;
2535 }
2536
2537 /* reset the controller to
2538 * put the device in a known good starting state */
2539 err = atl1c_phy_init(&adapter->hw);
2540 if (err) {
2541 err = -EIO;
2542 goto err_reset;
2543 }
2544 if (atl1c_read_mac_addr(&adapter->hw)) {
2545 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2546 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2547 }
2548 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2549 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2550 if (netif_msg_probe(adapter))
2551 dev_dbg(&pdev->dev, "mac address : %pM\n",
2552 adapter->hw.mac_addr);
2553
2554 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2555 INIT_WORK(&adapter->common_task, atl1c_common_task);
2556 adapter->work_event = 0;
2557 err = register_netdev(netdev);
2558 if (err) {
2559 dev_err(&pdev->dev, "register netdevice failed\n");
2560 goto err_register;
2561 }
2562
2563 if (netif_msg_probe(adapter))
2564 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2565 cards_found++;
2566 return 0;
2567
2568 err_reset:
2569 err_register:
2570 err_sw_init:
2571 iounmap(adapter->hw.hw_addr);
2572 err_init_netdev:
2573 err_ioremap:
2574 free_netdev(netdev);
2575 err_alloc_etherdev:
2576 pci_release_regions(pdev);
2577 err_pci_reg:
2578 err_dma:
2579 pci_disable_device(pdev);
2580 return err;
2581 }
2582
2583 /*
2584 * atl1c_remove - Device Removal Routine
2585 * @pdev: PCI device information struct
2586 *
2587 * atl1c_remove is called by the PCI subsystem to alert the driver
2588 * that it should release a PCI device. The could be caused by a
2589 * Hot-Plug event, or because the driver is going to be removed from
2590 * memory.
2591 */
2592 static void __devexit atl1c_remove(struct pci_dev *pdev)
2593 {
2594 struct net_device *netdev = pci_get_drvdata(pdev);
2595 struct atl1c_adapter *adapter = netdev_priv(netdev);
2596
2597 unregister_netdev(netdev);
2598 /* restore permanent address */
2599 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2600 atl1c_phy_disable(&adapter->hw);
2601
2602 iounmap(adapter->hw.hw_addr);
2603
2604 pci_release_regions(pdev);
2605 pci_disable_device(pdev);
2606 free_netdev(netdev);
2607 }
2608
2609 /*
2610 * atl1c_io_error_detected - called when PCI error is detected
2611 * @pdev: Pointer to PCI device
2612 * @state: The current pci connection state
2613 *
2614 * This function is called after a PCI bus error affecting
2615 * this device has been detected.
2616 */
2617 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2618 pci_channel_state_t state)
2619 {
2620 struct net_device *netdev = pci_get_drvdata(pdev);
2621 struct atl1c_adapter *adapter = netdev_priv(netdev);
2622
2623 netif_device_detach(netdev);
2624
2625 if (state == pci_channel_io_perm_failure)
2626 return PCI_ERS_RESULT_DISCONNECT;
2627
2628 if (netif_running(netdev))
2629 atl1c_down(adapter);
2630
2631 pci_disable_device(pdev);
2632
2633 /* Request a slot slot reset. */
2634 return PCI_ERS_RESULT_NEED_RESET;
2635 }
2636
2637 /*
2638 * atl1c_io_slot_reset - called after the pci bus has been reset.
2639 * @pdev: Pointer to PCI device
2640 *
2641 * Restart the card from scratch, as if from a cold-boot. Implementation
2642 * resembles the first-half of the e1000_resume routine.
2643 */
2644 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2645 {
2646 struct net_device *netdev = pci_get_drvdata(pdev);
2647 struct atl1c_adapter *adapter = netdev_priv(netdev);
2648
2649 if (pci_enable_device(pdev)) {
2650 if (netif_msg_hw(adapter))
2651 dev_err(&pdev->dev,
2652 "Cannot re-enable PCI device after reset\n");
2653 return PCI_ERS_RESULT_DISCONNECT;
2654 }
2655 pci_set_master(pdev);
2656
2657 pci_enable_wake(pdev, PCI_D3hot, 0);
2658 pci_enable_wake(pdev, PCI_D3cold, 0);
2659
2660 atl1c_reset_mac(&adapter->hw);
2661
2662 return PCI_ERS_RESULT_RECOVERED;
2663 }
2664
2665 /*
2666 * atl1c_io_resume - called when traffic can start flowing again.
2667 * @pdev: Pointer to PCI device
2668 *
2669 * This callback is called when the error recovery driver tells us that
2670 * its OK to resume normal operation. Implementation resembles the
2671 * second-half of the atl1c_resume routine.
2672 */
2673 static void atl1c_io_resume(struct pci_dev *pdev)
2674 {
2675 struct net_device *netdev = pci_get_drvdata(pdev);
2676 struct atl1c_adapter *adapter = netdev_priv(netdev);
2677
2678 if (netif_running(netdev)) {
2679 if (atl1c_up(adapter)) {
2680 if (netif_msg_hw(adapter))
2681 dev_err(&pdev->dev,
2682 "Cannot bring device back up after reset\n");
2683 return;
2684 }
2685 }
2686
2687 netif_device_attach(netdev);
2688 }
2689
2690 static struct pci_error_handlers atl1c_err_handler = {
2691 .error_detected = atl1c_io_error_detected,
2692 .slot_reset = atl1c_io_slot_reset,
2693 .resume = atl1c_io_resume,
2694 };
2695
2696 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2697
2698 static struct pci_driver atl1c_driver = {
2699 .name = atl1c_driver_name,
2700 .id_table = atl1c_pci_tbl,
2701 .probe = atl1c_probe,
2702 .remove = __devexit_p(atl1c_remove),
2703 .shutdown = atl1c_shutdown,
2704 .err_handler = &atl1c_err_handler,
2705 .driver.pm = &atl1c_pm_ops,
2706 };
2707
2708 /*
2709 * atl1c_init_module - Driver Registration Routine
2710 *
2711 * atl1c_init_module is the first routine called when the driver is
2712 * loaded. All it does is register with the PCI subsystem.
2713 */
2714 static int __init atl1c_init_module(void)
2715 {
2716 return pci_register_driver(&atl1c_driver);
2717 }
2718
2719 /*
2720 * atl1c_exit_module - Driver Exit Cleanup Routine
2721 *
2722 * atl1c_exit_module is called just before the driver is removed
2723 * from memory.
2724 */
2725 static void __exit atl1c_exit_module(void)
2726 {
2727 pci_unregister_driver(&atl1c_driver);
2728 }
2729
2730 module_init(atl1c_init_module);
2731 module_exit(atl1c_exit_module);
Linux kernel - Deliverables
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