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Merge tag 'pm-post-3.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[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 hw->hibernate = true;
265 if (atl1c_reset_mac(hw) != 0)
266 if (netif_msg_hw(adapter))
267 dev_warn(&pdev->dev, "reset mac failed\n");
268 atl1c_set_aspm(hw, SPEED_0);
269 atl1c_post_phy_linkchg(hw, SPEED_0);
270 atl1c_reset_dma_ring(adapter);
271 atl1c_configure(adapter);
272 } else {
273 /* Link Up */
274 hw->hibernate = false;
275 spin_lock_irqsave(&adapter->mdio_lock, flags);
276 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
277 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
278 if (unlikely(err))
279 return;
280 /* link result is our setting */
281 if (adapter->link_speed != speed ||
282 adapter->link_duplex != duplex) {
283 adapter->link_speed = speed;
284 adapter->link_duplex = duplex;
285 atl1c_set_aspm(hw, speed);
286 atl1c_post_phy_linkchg(hw, speed);
287 atl1c_start_mac(adapter);
288 if (netif_msg_link(adapter))
289 dev_info(&pdev->dev,
290 "%s: %s NIC Link is Up<%d Mbps %s>\n",
291 atl1c_driver_name, netdev->name,
292 adapter->link_speed,
293 adapter->link_duplex == FULL_DUPLEX ?
294 "Full Duplex" : "Half Duplex");
295 }
296 if (!netif_carrier_ok(netdev))
297 netif_carrier_on(netdev);
298 }
299 }
300
301 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
302 {
303 struct net_device *netdev = adapter->netdev;
304 struct pci_dev *pdev = adapter->pdev;
305 u16 phy_data;
306 u16 link_up;
307
308 spin_lock(&adapter->mdio_lock);
309 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
310 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
311 spin_unlock(&adapter->mdio_lock);
312 link_up = phy_data & BMSR_LSTATUS;
313 /* notify upper layer link down ASAP */
314 if (!link_up) {
315 if (netif_carrier_ok(netdev)) {
316 /* old link state: Up */
317 netif_carrier_off(netdev);
318 if (netif_msg_link(adapter))
319 dev_info(&pdev->dev,
320 "%s: %s NIC Link is Down\n",
321 atl1c_driver_name, netdev->name);
322 adapter->link_speed = SPEED_0;
323 }
324 }
325
326 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
327 schedule_work(&adapter->common_task);
328 }
329
330 static void atl1c_common_task(struct work_struct *work)
331 {
332 struct atl1c_adapter *adapter;
333 struct net_device *netdev;
334
335 adapter = container_of(work, struct atl1c_adapter, common_task);
336 netdev = adapter->netdev;
337
338 if (test_bit(__AT_DOWN, &adapter->flags))
339 return;
340
341 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
342 netif_device_detach(netdev);
343 atl1c_down(adapter);
344 atl1c_up(adapter);
345 netif_device_attach(netdev);
346 }
347
348 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
349 &adapter->work_event)) {
350 atl1c_irq_disable(adapter);
351 atl1c_check_link_status(adapter);
352 atl1c_irq_enable(adapter);
353 }
354 }
355
356
357 static void atl1c_del_timer(struct atl1c_adapter *adapter)
358 {
359 del_timer_sync(&adapter->phy_config_timer);
360 }
361
362
363 /*
364 * atl1c_tx_timeout - Respond to a Tx Hang
365 * @netdev: network interface device structure
366 */
367 static void atl1c_tx_timeout(struct net_device *netdev)
368 {
369 struct atl1c_adapter *adapter = netdev_priv(netdev);
370
371 /* Do the reset outside of interrupt context */
372 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
373 schedule_work(&adapter->common_task);
374 }
375
376 /*
377 * atl1c_set_multi - Multicast and Promiscuous mode set
378 * @netdev: network interface device structure
379 *
380 * The set_multi entry point is called whenever the multicast address
381 * list or the network interface flags are updated. This routine is
382 * responsible for configuring the hardware for proper multicast,
383 * promiscuous mode, and all-multi behavior.
384 */
385 static void atl1c_set_multi(struct net_device *netdev)
386 {
387 struct atl1c_adapter *adapter = netdev_priv(netdev);
388 struct atl1c_hw *hw = &adapter->hw;
389 struct netdev_hw_addr *ha;
390 u32 mac_ctrl_data;
391 u32 hash_value;
392
393 /* Check for Promiscuous and All Multicast modes */
394 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
395
396 if (netdev->flags & IFF_PROMISC) {
397 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
398 } else if (netdev->flags & IFF_ALLMULTI) {
399 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
400 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
401 } else {
402 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
403 }
404
405 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
406
407 /* clear the old settings from the multicast hash table */
408 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
409 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
410
411 /* comoute mc addresses' hash value ,and put it into hash table */
412 netdev_for_each_mc_addr(ha, netdev) {
413 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
414 atl1c_hash_set(hw, hash_value);
415 }
416 }
417
418 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
419 {
420 if (features & NETIF_F_HW_VLAN_RX) {
421 /* enable VLAN tag insert/strip */
422 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
423 } else {
424 /* disable VLAN tag insert/strip */
425 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
426 }
427 }
428
429 static void atl1c_vlan_mode(struct net_device *netdev,
430 netdev_features_t features)
431 {
432 struct atl1c_adapter *adapter = netdev_priv(netdev);
433 struct pci_dev *pdev = adapter->pdev;
434 u32 mac_ctrl_data = 0;
435
436 if (netif_msg_pktdata(adapter))
437 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
438
439 atl1c_irq_disable(adapter);
440 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
441 __atl1c_vlan_mode(features, &mac_ctrl_data);
442 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
443 atl1c_irq_enable(adapter);
444 }
445
446 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
447 {
448 struct pci_dev *pdev = adapter->pdev;
449
450 if (netif_msg_pktdata(adapter))
451 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
452 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
453 }
454
455 /*
456 * atl1c_set_mac - Change the Ethernet Address of the NIC
457 * @netdev: network interface device structure
458 * @p: pointer to an address structure
459 *
460 * Returns 0 on success, negative on failure
461 */
462 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
463 {
464 struct atl1c_adapter *adapter = netdev_priv(netdev);
465 struct sockaddr *addr = p;
466
467 if (!is_valid_ether_addr(addr->sa_data))
468 return -EADDRNOTAVAIL;
469
470 if (netif_running(netdev))
471 return -EBUSY;
472
473 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
474 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
475 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
476
477 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
478
479 return 0;
480 }
481
482 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
483 struct net_device *dev)
484 {
485 int mtu = dev->mtu;
486
487 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
488 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
489 }
490
491 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
492 netdev_features_t features)
493 {
494 /*
495 * Since there is no support for separate rx/tx vlan accel
496 * enable/disable make sure tx flag is always in same state as rx.
497 */
498 if (features & NETIF_F_HW_VLAN_RX)
499 features |= NETIF_F_HW_VLAN_TX;
500 else
501 features &= ~NETIF_F_HW_VLAN_TX;
502
503 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
504 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
505
506 return features;
507 }
508
509 static int atl1c_set_features(struct net_device *netdev,
510 netdev_features_t features)
511 {
512 netdev_features_t changed = netdev->features ^ features;
513
514 if (changed & NETIF_F_HW_VLAN_RX)
515 atl1c_vlan_mode(netdev, features);
516
517 return 0;
518 }
519
520 /*
521 * atl1c_change_mtu - Change the Maximum Transfer Unit
522 * @netdev: network interface device structure
523 * @new_mtu: new value for maximum frame size
524 *
525 * Returns 0 on success, negative on failure
526 */
527 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
528 {
529 struct atl1c_adapter *adapter = netdev_priv(netdev);
530 struct atl1c_hw *hw = &adapter->hw;
531 int old_mtu = netdev->mtu;
532 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
533
534 /* Fast Ethernet controller doesn't support jumbo packet */
535 if (((hw->nic_type == athr_l2c ||
536 hw->nic_type == athr_l2c_b ||
537 hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
538 max_frame < ETH_ZLEN + ETH_FCS_LEN ||
539 max_frame > MAX_JUMBO_FRAME_SIZE) {
540 if (netif_msg_link(adapter))
541 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
542 return -EINVAL;
543 }
544 /* set MTU */
545 if (old_mtu != new_mtu && netif_running(netdev)) {
546 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
547 msleep(1);
548 netdev->mtu = new_mtu;
549 adapter->hw.max_frame_size = new_mtu;
550 atl1c_set_rxbufsize(adapter, netdev);
551 atl1c_down(adapter);
552 netdev_update_features(netdev);
553 atl1c_up(adapter);
554 clear_bit(__AT_RESETTING, &adapter->flags);
555 }
556 return 0;
557 }
558
559 /*
560 * caller should hold mdio_lock
561 */
562 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
563 {
564 struct atl1c_adapter *adapter = netdev_priv(netdev);
565 u16 result;
566
567 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
568 return result;
569 }
570
571 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
572 int reg_num, int val)
573 {
574 struct atl1c_adapter *adapter = netdev_priv(netdev);
575
576 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
577 }
578
579 /*
580 * atl1c_mii_ioctl -
581 * @netdev:
582 * @ifreq:
583 * @cmd:
584 */
585 static int atl1c_mii_ioctl(struct net_device *netdev,
586 struct ifreq *ifr, int cmd)
587 {
588 struct atl1c_adapter *adapter = netdev_priv(netdev);
589 struct pci_dev *pdev = adapter->pdev;
590 struct mii_ioctl_data *data = if_mii(ifr);
591 unsigned long flags;
592 int retval = 0;
593
594 if (!netif_running(netdev))
595 return -EINVAL;
596
597 spin_lock_irqsave(&adapter->mdio_lock, flags);
598 switch (cmd) {
599 case SIOCGMIIPHY:
600 data->phy_id = 0;
601 break;
602
603 case SIOCGMIIREG:
604 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
605 &data->val_out)) {
606 retval = -EIO;
607 goto out;
608 }
609 break;
610
611 case SIOCSMIIREG:
612 if (data->reg_num & ~(0x1F)) {
613 retval = -EFAULT;
614 goto out;
615 }
616
617 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
618 data->reg_num, data->val_in);
619 if (atl1c_write_phy_reg(&adapter->hw,
620 data->reg_num, data->val_in)) {
621 retval = -EIO;
622 goto out;
623 }
624 break;
625
626 default:
627 retval = -EOPNOTSUPP;
628 break;
629 }
630 out:
631 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
632 return retval;
633 }
634
635 /*
636 * atl1c_ioctl -
637 * @netdev:
638 * @ifreq:
639 * @cmd:
640 */
641 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
642 {
643 switch (cmd) {
644 case SIOCGMIIPHY:
645 case SIOCGMIIREG:
646 case SIOCSMIIREG:
647 return atl1c_mii_ioctl(netdev, ifr, cmd);
648 default:
649 return -EOPNOTSUPP;
650 }
651 }
652
653 /*
654 * atl1c_alloc_queues - Allocate memory for all rings
655 * @adapter: board private structure to initialize
656 *
657 */
658 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
659 {
660 return 0;
661 }
662
663 static void atl1c_set_mac_type(struct atl1c_hw *hw)
664 {
665 switch (hw->device_id) {
666 case PCI_DEVICE_ID_ATTANSIC_L2C:
667 hw->nic_type = athr_l2c;
668 break;
669 case PCI_DEVICE_ID_ATTANSIC_L1C:
670 hw->nic_type = athr_l1c;
671 break;
672 case PCI_DEVICE_ID_ATHEROS_L2C_B:
673 hw->nic_type = athr_l2c_b;
674 break;
675 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
676 hw->nic_type = athr_l2c_b2;
677 break;
678 case PCI_DEVICE_ID_ATHEROS_L1D:
679 hw->nic_type = athr_l1d;
680 break;
681 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
682 hw->nic_type = athr_l1d_2;
683 break;
684 default:
685 break;
686 }
687 }
688
689 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
690 {
691 u32 link_ctrl_data;
692
693 atl1c_set_mac_type(hw);
694 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
695
696 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
697 ATL1C_TXQ_MODE_ENHANCE;
698 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
699 ATL1C_ASPM_L1_SUPPORT;
700 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
701
702 if (hw->nic_type == athr_l1c ||
703 hw->nic_type == athr_l1d ||
704 hw->nic_type == athr_l1d_2)
705 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
706 return 0;
707 }
708
709 struct atl1c_platform_patch {
710 u16 pci_did;
711 u8 pci_revid;
712 u16 subsystem_vid;
713 u16 subsystem_did;
714 u32 patch_flag;
715 #define ATL1C_LINK_PATCH 0x1
716 };
717 static const struct atl1c_platform_patch plats[] __devinitdata = {
718 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
719 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
720 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
721 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
722 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
723 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
724 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
725 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
726 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
727 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
728 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
729 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
730 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
731 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
732 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
733 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
734 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
735 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
736 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
737 {0},
738 };
739
740 static void __devinit atl1c_patch_assign(struct atl1c_hw *hw)
741 {
742 int i = 0;
743
744 hw->msi_lnkpatch = false;
745
746 while (plats[i].pci_did != 0) {
747 if (plats[i].pci_did == hw->device_id &&
748 plats[i].pci_revid == hw->revision_id &&
749 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
750 plats[i].subsystem_did == hw->subsystem_id) {
751 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
752 hw->msi_lnkpatch = true;
753 }
754 i++;
755 }
756 }
757 /*
758 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
759 * @adapter: board private structure to initialize
760 *
761 * atl1c_sw_init initializes the Adapter private data structure.
762 * Fields are initialized based on PCI device information and
763 * OS network device settings (MTU size).
764 */
765 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
766 {
767 struct atl1c_hw *hw = &adapter->hw;
768 struct pci_dev *pdev = adapter->pdev;
769 u32 revision;
770
771
772 adapter->wol = 0;
773 device_set_wakeup_enable(&pdev->dev, false);
774 adapter->link_speed = SPEED_0;
775 adapter->link_duplex = FULL_DUPLEX;
776 adapter->tpd_ring[0].count = 1024;
777 adapter->rfd_ring.count = 512;
778
779 hw->vendor_id = pdev->vendor;
780 hw->device_id = pdev->device;
781 hw->subsystem_vendor_id = pdev->subsystem_vendor;
782 hw->subsystem_id = pdev->subsystem_device;
783 AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
784 hw->revision_id = revision & 0xFF;
785 /* before link up, we assume hibernate is true */
786 hw->hibernate = true;
787 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
788 if (atl1c_setup_mac_funcs(hw) != 0) {
789 dev_err(&pdev->dev, "set mac function pointers failed\n");
790 return -1;
791 }
792 atl1c_patch_assign(hw);
793
794 hw->intr_mask = IMR_NORMAL_MASK;
795 hw->phy_configured = false;
796 hw->preamble_len = 7;
797 hw->max_frame_size = adapter->netdev->mtu;
798 hw->autoneg_advertised = ADVERTISED_Autoneg;
799 hw->indirect_tab = 0xE4E4E4E4;
800 hw->base_cpu = 0;
801
802 hw->ict = 50000; /* 100ms */
803 hw->smb_timer = 200000; /* 400ms */
804 hw->rx_imt = 200;
805 hw->tx_imt = 1000;
806
807 hw->tpd_burst = 5;
808 hw->rfd_burst = 8;
809 hw->dma_order = atl1c_dma_ord_out;
810 hw->dmar_block = atl1c_dma_req_1024;
811
812 if (atl1c_alloc_queues(adapter)) {
813 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
814 return -ENOMEM;
815 }
816 /* TODO */
817 atl1c_set_rxbufsize(adapter, adapter->netdev);
818 atomic_set(&adapter->irq_sem, 1);
819 spin_lock_init(&adapter->mdio_lock);
820 spin_lock_init(&adapter->tx_lock);
821 set_bit(__AT_DOWN, &adapter->flags);
822
823 return 0;
824 }
825
826 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
827 struct atl1c_buffer *buffer_info, int in_irq)
828 {
829 u16 pci_driection;
830 if (buffer_info->flags & ATL1C_BUFFER_FREE)
831 return;
832 if (buffer_info->dma) {
833 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
834 pci_driection = PCI_DMA_FROMDEVICE;
835 else
836 pci_driection = PCI_DMA_TODEVICE;
837
838 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
839 pci_unmap_single(pdev, buffer_info->dma,
840 buffer_info->length, pci_driection);
841 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
842 pci_unmap_page(pdev, buffer_info->dma,
843 buffer_info->length, pci_driection);
844 }
845 if (buffer_info->skb) {
846 if (in_irq)
847 dev_kfree_skb_irq(buffer_info->skb);
848 else
849 dev_kfree_skb(buffer_info->skb);
850 }
851 buffer_info->dma = 0;
852 buffer_info->skb = NULL;
853 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
854 }
855 /*
856 * atl1c_clean_tx_ring - Free Tx-skb
857 * @adapter: board private structure
858 */
859 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
860 enum atl1c_trans_queue type)
861 {
862 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
863 struct atl1c_buffer *buffer_info;
864 struct pci_dev *pdev = adapter->pdev;
865 u16 index, ring_count;
866
867 ring_count = tpd_ring->count;
868 for (index = 0; index < ring_count; index++) {
869 buffer_info = &tpd_ring->buffer_info[index];
870 atl1c_clean_buffer(pdev, buffer_info, 0);
871 }
872
873 /* Zero out Tx-buffers */
874 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
875 ring_count);
876 atomic_set(&tpd_ring->next_to_clean, 0);
877 tpd_ring->next_to_use = 0;
878 }
879
880 /*
881 * atl1c_clean_rx_ring - Free rx-reservation skbs
882 * @adapter: board private structure
883 */
884 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
885 {
886 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
887 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
888 struct atl1c_buffer *buffer_info;
889 struct pci_dev *pdev = adapter->pdev;
890 int j;
891
892 for (j = 0; j < rfd_ring->count; j++) {
893 buffer_info = &rfd_ring->buffer_info[j];
894 atl1c_clean_buffer(pdev, buffer_info, 0);
895 }
896 /* zero out the descriptor ring */
897 memset(rfd_ring->desc, 0, rfd_ring->size);
898 rfd_ring->next_to_clean = 0;
899 rfd_ring->next_to_use = 0;
900 rrd_ring->next_to_use = 0;
901 rrd_ring->next_to_clean = 0;
902 }
903
904 /*
905 * Read / Write Ptr Initialize:
906 */
907 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
908 {
909 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
910 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
911 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
912 struct atl1c_buffer *buffer_info;
913 int i, j;
914
915 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
916 tpd_ring[i].next_to_use = 0;
917 atomic_set(&tpd_ring[i].next_to_clean, 0);
918 buffer_info = tpd_ring[i].buffer_info;
919 for (j = 0; j < tpd_ring->count; j++)
920 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
921 ATL1C_BUFFER_FREE);
922 }
923 rfd_ring->next_to_use = 0;
924 rfd_ring->next_to_clean = 0;
925 rrd_ring->next_to_use = 0;
926 rrd_ring->next_to_clean = 0;
927 for (j = 0; j < rfd_ring->count; j++) {
928 buffer_info = &rfd_ring->buffer_info[j];
929 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
930 }
931 }
932
933 /*
934 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
935 * @adapter: board private structure
936 *
937 * Free all transmit software resources
938 */
939 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
940 {
941 struct pci_dev *pdev = adapter->pdev;
942
943 pci_free_consistent(pdev, adapter->ring_header.size,
944 adapter->ring_header.desc,
945 adapter->ring_header.dma);
946 adapter->ring_header.desc = NULL;
947
948 /* Note: just free tdp_ring.buffer_info,
949 * it contain rfd_ring.buffer_info, do not double free */
950 if (adapter->tpd_ring[0].buffer_info) {
951 kfree(adapter->tpd_ring[0].buffer_info);
952 adapter->tpd_ring[0].buffer_info = NULL;
953 }
954 }
955
956 /*
957 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
958 * @adapter: board private structure
959 *
960 * Return 0 on success, negative on failure
961 */
962 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
963 {
964 struct pci_dev *pdev = adapter->pdev;
965 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
966 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
967 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
968 struct atl1c_ring_header *ring_header = &adapter->ring_header;
969 int size;
970 int i;
971 int count = 0;
972 int rx_desc_count = 0;
973 u32 offset = 0;
974
975 rrd_ring->count = rfd_ring->count;
976 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
977 tpd_ring[i].count = tpd_ring[0].count;
978
979 /* 2 tpd queue, one high priority queue,
980 * another normal priority queue */
981 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
982 rfd_ring->count);
983 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
984 if (unlikely(!tpd_ring->buffer_info)) {
985 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
986 size);
987 goto err_nomem;
988 }
989 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
990 tpd_ring[i].buffer_info =
991 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
992 count += tpd_ring[i].count;
993 }
994
995 rfd_ring->buffer_info =
996 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
997 count += rfd_ring->count;
998 rx_desc_count += rfd_ring->count;
999
1000 /*
1001 * real ring DMA buffer
1002 * each ring/block may need up to 8 bytes for alignment, hence the
1003 * additional bytes tacked onto the end.
1004 */
1005 ring_header->size = size =
1006 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1007 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1008 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1009 8 * 4;
1010
1011 ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1012 &ring_header->dma);
1013 if (unlikely(!ring_header->desc)) {
1014 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1015 goto err_nomem;
1016 }
1017 memset(ring_header->desc, 0, ring_header->size);
1018 /* init TPD ring */
1019
1020 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1021 offset = tpd_ring[0].dma - ring_header->dma;
1022 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1023 tpd_ring[i].dma = ring_header->dma + offset;
1024 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1025 tpd_ring[i].size =
1026 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1027 offset += roundup(tpd_ring[i].size, 8);
1028 }
1029 /* init RFD ring */
1030 rfd_ring->dma = ring_header->dma + offset;
1031 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1032 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1033 offset += roundup(rfd_ring->size, 8);
1034
1035 /* init RRD ring */
1036 rrd_ring->dma = ring_header->dma + offset;
1037 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1038 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1039 rrd_ring->count;
1040 offset += roundup(rrd_ring->size, 8);
1041
1042 return 0;
1043
1044 err_nomem:
1045 kfree(tpd_ring->buffer_info);
1046 return -ENOMEM;
1047 }
1048
1049 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1050 {
1051 struct atl1c_hw *hw = &adapter->hw;
1052 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1053 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1054 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1055 adapter->tpd_ring;
1056
1057 /* TPD */
1058 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1059 (u32)((tpd_ring[atl1c_trans_normal].dma &
1060 AT_DMA_HI_ADDR_MASK) >> 32));
1061 /* just enable normal priority TX queue */
1062 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1063 (u32)(tpd_ring[atl1c_trans_normal].dma &
1064 AT_DMA_LO_ADDR_MASK));
1065 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1066 (u32)(tpd_ring[atl1c_trans_high].dma &
1067 AT_DMA_LO_ADDR_MASK));
1068 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1069 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1070
1071
1072 /* RFD */
1073 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1074 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1075 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1076 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1077
1078 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1079 rfd_ring->count & RFD_RING_SIZE_MASK);
1080 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1081 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1082
1083 /* RRD */
1084 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1085 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1086 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1087 (rrd_ring->count & RRD_RING_SIZE_MASK));
1088
1089 if (hw->nic_type == athr_l2c_b) {
1090 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1091 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1092 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1093 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1094 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1095 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1096 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1097 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1098 }
1099 /* Load all of base address above */
1100 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1101 }
1102
1103 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1104 {
1105 struct atl1c_hw *hw = &adapter->hw;
1106 int max_pay_load;
1107 u16 tx_offload_thresh;
1108 u32 txq_ctrl_data;
1109
1110 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1111 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1112 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1113 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1114 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1115 /*
1116 * if BIOS had changed the dam-read-max-length to an invalid value,
1117 * restore it to default value
1118 */
1119 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1120 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1121 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1122 }
1123 txq_ctrl_data =
1124 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1125 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1126
1127 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1128 }
1129
1130 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1131 {
1132 struct atl1c_hw *hw = &adapter->hw;
1133 u32 rxq_ctrl_data;
1134
1135 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1136 RXQ_RFD_BURST_NUM_SHIFT;
1137
1138 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1139 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1140
1141 /* aspm for gigabit */
1142 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1143 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1144 ASPM_THRUPUT_LIMIT_100M);
1145
1146 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1147 }
1148
1149 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1150 {
1151 struct atl1c_hw *hw = &adapter->hw;
1152 u32 dma_ctrl_data;
1153
1154 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1155 DMA_CTRL_RREQ_PRI_DATA |
1156 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1157 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1158 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1159
1160 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1161 }
1162
1163 /*
1164 * Stop the mac, transmit and receive units
1165 * hw - Struct containing variables accessed by shared code
1166 * return : 0 or idle status (if error)
1167 */
1168 static int atl1c_stop_mac(struct atl1c_hw *hw)
1169 {
1170 u32 data;
1171
1172 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1173 data &= ~RXQ_CTRL_EN;
1174 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1175
1176 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1177 data &= ~TXQ_CTRL_EN;
1178 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1179
1180 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1181
1182 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1183 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1184 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1185
1186 return (int)atl1c_wait_until_idle(hw,
1187 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1188 }
1189
1190 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1191 {
1192 struct atl1c_hw *hw = &adapter->hw;
1193 u32 mac, txq, rxq;
1194
1195 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1196 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1197 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1198
1199 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1200 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1201 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1202
1203 txq |= TXQ_CTRL_EN;
1204 rxq |= RXQ_CTRL_EN;
1205 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1206 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1207 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1208 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1209 MAC_CTRL_HASH_ALG_CRC32;
1210 if (hw->mac_duplex)
1211 mac |= MAC_CTRL_DUPLX;
1212 else
1213 mac &= ~MAC_CTRL_DUPLX;
1214 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1215 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1216
1217 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1218 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1219 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1220 }
1221
1222 /*
1223 * Reset the transmit and receive units; mask and clear all interrupts.
1224 * hw - Struct containing variables accessed by shared code
1225 * return : 0 or idle status (if error)
1226 */
1227 static int atl1c_reset_mac(struct atl1c_hw *hw)
1228 {
1229 struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1230 struct pci_dev *pdev = adapter->pdev;
1231 u32 ctrl_data = 0;
1232
1233 atl1c_stop_mac(hw);
1234 /*
1235 * Issue Soft Reset to the MAC. This will reset the chip's
1236 * transmit, receive, DMA. It will not effect
1237 * the current PCI configuration. The global reset bit is self-
1238 * clearing, and should clear within a microsecond.
1239 */
1240 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1241 ctrl_data |= MASTER_CTRL_OOB_DIS;
1242 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1243
1244 AT_WRITE_FLUSH(hw);
1245 msleep(10);
1246 /* Wait at least 10ms for All module to be Idle */
1247
1248 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1249 dev_err(&pdev->dev,
1250 "MAC state machine can't be idle since"
1251 " disabled for 10ms second\n");
1252 return -1;
1253 }
1254 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1255
1256 /* driver control speed/duplex */
1257 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1258 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1259
1260 /* clk switch setting */
1261 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1262 switch (hw->nic_type) {
1263 case athr_l2c_b:
1264 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1265 SERDES_MAC_CLK_SLOWDOWN);
1266 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1267 break;
1268 case athr_l2c_b2:
1269 case athr_l1d_2:
1270 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1271 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1272 break;
1273 default:
1274 break;
1275 }
1276
1277 return 0;
1278 }
1279
1280 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1281 {
1282 u16 ctrl_flags = hw->ctrl_flags;
1283
1284 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1285 atl1c_set_aspm(hw, SPEED_0);
1286 hw->ctrl_flags = ctrl_flags;
1287 }
1288
1289 /*
1290 * Set ASPM state.
1291 * Enable/disable L0s/L1 depend on link state.
1292 */
1293 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1294 {
1295 u32 pm_ctrl_data;
1296 u32 link_l1_timer;
1297
1298 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1299 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1300 PM_CTRL_ASPM_L0S_EN |
1301 PM_CTRL_MAC_ASPM_CHK);
1302 /* L1 timer */
1303 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1304 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1305 link_l1_timer =
1306 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1307 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1308 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1309 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1310 } else {
1311 link_l1_timer = hw->nic_type == athr_l2c_b ?
1312 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1313 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1314 link_l1_timer = 1;
1315 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1316 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1317 }
1318
1319 /* L0S/L1 enable */
1320 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1321 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1322 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1323 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1324
1325 /* l2cb & l1d & l2cb2 & l1d2 */
1326 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1327 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1328 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1329 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1330 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1331 PM_CTRL_SERDES_PD_EX_L1 |
1332 PM_CTRL_CLK_SWH_L1;
1333 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1334 PM_CTRL_SERDES_PLL_L1_EN |
1335 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1336 PM_CTRL_SA_DLY_EN |
1337 PM_CTRL_HOTRST);
1338 /* disable l0s if link down or l2cb */
1339 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1340 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1341 } else { /* l1c */
1342 pm_ctrl_data =
1343 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1344 if (link_speed != SPEED_0) {
1345 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1346 PM_CTRL_SERDES_PLL_L1_EN |
1347 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1348 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1349 PM_CTRL_CLK_SWH_L1 |
1350 PM_CTRL_ASPM_L0S_EN |
1351 PM_CTRL_ASPM_L1_EN);
1352 } else { /* link down */
1353 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1354 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1355 PM_CTRL_SERDES_PLL_L1_EN |
1356 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1357 PM_CTRL_ASPM_L0S_EN);
1358 }
1359 }
1360 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1361
1362 return;
1363 }
1364
1365 /*
1366 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1367 * @adapter: board private structure
1368 *
1369 * Configure the Tx /Rx unit of the MAC after a reset.
1370 */
1371 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1372 {
1373 struct atl1c_hw *hw = &adapter->hw;
1374 u32 master_ctrl_data = 0;
1375 u32 intr_modrt_data;
1376 u32 data;
1377
1378 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1379 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1380 MASTER_CTRL_RX_ITIMER_EN |
1381 MASTER_CTRL_INT_RDCLR);
1382 /* clear interrupt status */
1383 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1384 /* Clear any WOL status */
1385 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1386 /* set Interrupt Clear Timer
1387 * HW will enable self to assert interrupt event to system after
1388 * waiting x-time for software to notify it accept interrupt.
1389 */
1390
1391 data = CLK_GATING_EN_ALL;
1392 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1393 if (hw->nic_type == athr_l2c_b)
1394 data &= ~CLK_GATING_RXMAC_EN;
1395 } else
1396 data = 0;
1397 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1398
1399 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1400 hw->ict & INT_RETRIG_TIMER_MASK);
1401
1402 atl1c_configure_des_ring(adapter);
1403
1404 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1405 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1406 IRQ_MODRT_TX_TIMER_SHIFT;
1407 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1408 IRQ_MODRT_RX_TIMER_SHIFT;
1409 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1410 master_ctrl_data |=
1411 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1412 }
1413
1414 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1415 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1416
1417 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1418 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1419
1420 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1421 hw->smb_timer & SMB_STAT_TIMER_MASK);
1422
1423 /* set MTU */
1424 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1425 VLAN_HLEN + ETH_FCS_LEN);
1426
1427 atl1c_configure_tx(adapter);
1428 atl1c_configure_rx(adapter);
1429 atl1c_configure_dma(adapter);
1430
1431 return 0;
1432 }
1433
1434 static int atl1c_configure(struct atl1c_adapter *adapter)
1435 {
1436 struct net_device *netdev = adapter->netdev;
1437 int num;
1438
1439 atl1c_init_ring_ptrs(adapter);
1440 atl1c_set_multi(netdev);
1441 atl1c_restore_vlan(adapter);
1442
1443 num = atl1c_alloc_rx_buffer(adapter);
1444 if (unlikely(num == 0))
1445 return -ENOMEM;
1446
1447 if (atl1c_configure_mac(adapter))
1448 return -EIO;
1449
1450 return 0;
1451 }
1452
1453 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1454 {
1455 u16 hw_reg_addr = 0;
1456 unsigned long *stats_item = NULL;
1457 u32 data;
1458
1459 /* update rx status */
1460 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1461 stats_item = &adapter->hw_stats.rx_ok;
1462 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1463 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1464 *stats_item += data;
1465 stats_item++;
1466 hw_reg_addr += 4;
1467 }
1468 /* update tx status */
1469 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1470 stats_item = &adapter->hw_stats.tx_ok;
1471 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1472 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1473 *stats_item += data;
1474 stats_item++;
1475 hw_reg_addr += 4;
1476 }
1477 }
1478
1479 /*
1480 * atl1c_get_stats - Get System Network Statistics
1481 * @netdev: network interface device structure
1482 *
1483 * Returns the address of the device statistics structure.
1484 * The statistics are actually updated from the timer callback.
1485 */
1486 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1487 {
1488 struct atl1c_adapter *adapter = netdev_priv(netdev);
1489 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1490 struct net_device_stats *net_stats = &netdev->stats;
1491
1492 atl1c_update_hw_stats(adapter);
1493 net_stats->rx_packets = hw_stats->rx_ok;
1494 net_stats->tx_packets = hw_stats->tx_ok;
1495 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1496 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1497 net_stats->multicast = hw_stats->rx_mcast;
1498 net_stats->collisions = hw_stats->tx_1_col +
1499 hw_stats->tx_2_col * 2 +
1500 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1501 net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1502 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1503 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1504 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1505 net_stats->rx_length_errors = hw_stats->rx_len_err;
1506 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1507 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1508 net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1509
1510 net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1511
1512 net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1513 hw_stats->tx_underrun + hw_stats->tx_trunc;
1514 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1515 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1516 net_stats->tx_window_errors = hw_stats->tx_late_col;
1517
1518 return net_stats;
1519 }
1520
1521 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1522 {
1523 u16 phy_data;
1524
1525 spin_lock(&adapter->mdio_lock);
1526 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1527 spin_unlock(&adapter->mdio_lock);
1528 }
1529
1530 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1531 enum atl1c_trans_queue type)
1532 {
1533 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1534 &adapter->tpd_ring[type];
1535 struct atl1c_buffer *buffer_info;
1536 struct pci_dev *pdev = adapter->pdev;
1537 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1538 u16 hw_next_to_clean;
1539 u16 reg;
1540
1541 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1542
1543 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1544
1545 while (next_to_clean != hw_next_to_clean) {
1546 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1547 atl1c_clean_buffer(pdev, buffer_info, 1);
1548 if (++next_to_clean == tpd_ring->count)
1549 next_to_clean = 0;
1550 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1551 }
1552
1553 if (netif_queue_stopped(adapter->netdev) &&
1554 netif_carrier_ok(adapter->netdev)) {
1555 netif_wake_queue(adapter->netdev);
1556 }
1557
1558 return true;
1559 }
1560
1561 /*
1562 * atl1c_intr - Interrupt Handler
1563 * @irq: interrupt number
1564 * @data: pointer to a network interface device structure
1565 * @pt_regs: CPU registers structure
1566 */
1567 static irqreturn_t atl1c_intr(int irq, void *data)
1568 {
1569 struct net_device *netdev = data;
1570 struct atl1c_adapter *adapter = netdev_priv(netdev);
1571 struct pci_dev *pdev = adapter->pdev;
1572 struct atl1c_hw *hw = &adapter->hw;
1573 int max_ints = AT_MAX_INT_WORK;
1574 int handled = IRQ_NONE;
1575 u32 status;
1576 u32 reg_data;
1577
1578 do {
1579 AT_READ_REG(hw, REG_ISR, &reg_data);
1580 status = reg_data & hw->intr_mask;
1581
1582 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1583 if (max_ints != AT_MAX_INT_WORK)
1584 handled = IRQ_HANDLED;
1585 break;
1586 }
1587 /* link event */
1588 if (status & ISR_GPHY)
1589 atl1c_clear_phy_int(adapter);
1590 /* Ack ISR */
1591 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1592 if (status & ISR_RX_PKT) {
1593 if (likely(napi_schedule_prep(&adapter->napi))) {
1594 hw->intr_mask &= ~ISR_RX_PKT;
1595 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1596 __napi_schedule(&adapter->napi);
1597 }
1598 }
1599 if (status & ISR_TX_PKT)
1600 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1601
1602 handled = IRQ_HANDLED;
1603 /* check if PCIE PHY Link down */
1604 if (status & ISR_ERROR) {
1605 if (netif_msg_hw(adapter))
1606 dev_err(&pdev->dev,
1607 "atl1c hardware error (status = 0x%x)\n",
1608 status & ISR_ERROR);
1609 /* reset MAC */
1610 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1611 schedule_work(&adapter->common_task);
1612 return IRQ_HANDLED;
1613 }
1614
1615 if (status & ISR_OVER)
1616 if (netif_msg_intr(adapter))
1617 dev_warn(&pdev->dev,
1618 "TX/RX overflow (status = 0x%x)\n",
1619 status & ISR_OVER);
1620
1621 /* link event */
1622 if (status & (ISR_GPHY | ISR_MANUAL)) {
1623 netdev->stats.tx_carrier_errors++;
1624 atl1c_link_chg_event(adapter);
1625 break;
1626 }
1627
1628 } while (--max_ints > 0);
1629 /* re-enable Interrupt*/
1630 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1631 return handled;
1632 }
1633
1634 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1635 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1636 {
1637 /*
1638 * The pid field in RRS in not correct sometimes, so we
1639 * cannot figure out if the packet is fragmented or not,
1640 * so we tell the KERNEL CHECKSUM_NONE
1641 */
1642 skb_checksum_none_assert(skb);
1643 }
1644
1645 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1646 {
1647 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1648 struct pci_dev *pdev = adapter->pdev;
1649 struct atl1c_buffer *buffer_info, *next_info;
1650 struct sk_buff *skb;
1651 void *vir_addr = NULL;
1652 u16 num_alloc = 0;
1653 u16 rfd_next_to_use, next_next;
1654 struct atl1c_rx_free_desc *rfd_desc;
1655
1656 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1657 if (++next_next == rfd_ring->count)
1658 next_next = 0;
1659 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1660 next_info = &rfd_ring->buffer_info[next_next];
1661
1662 while (next_info->flags & ATL1C_BUFFER_FREE) {
1663 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1664
1665 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1666 if (unlikely(!skb)) {
1667 if (netif_msg_rx_err(adapter))
1668 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1669 break;
1670 }
1671
1672 /*
1673 * Make buffer alignment 2 beyond a 16 byte boundary
1674 * this will result in a 16 byte aligned IP header after
1675 * the 14 byte MAC header is removed
1676 */
1677 vir_addr = skb->data;
1678 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1679 buffer_info->skb = skb;
1680 buffer_info->length = adapter->rx_buffer_len;
1681 buffer_info->dma = pci_map_single(pdev, vir_addr,
1682 buffer_info->length,
1683 PCI_DMA_FROMDEVICE);
1684 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1685 ATL1C_PCIMAP_FROMDEVICE);
1686 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1687 rfd_next_to_use = next_next;
1688 if (++next_next == rfd_ring->count)
1689 next_next = 0;
1690 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1691 next_info = &rfd_ring->buffer_info[next_next];
1692 num_alloc++;
1693 }
1694
1695 if (num_alloc) {
1696 /* TODO: update mailbox here */
1697 wmb();
1698 rfd_ring->next_to_use = rfd_next_to_use;
1699 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1700 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1701 }
1702
1703 return num_alloc;
1704 }
1705
1706 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1707 struct atl1c_recv_ret_status *rrs, u16 num)
1708 {
1709 u16 i;
1710 /* the relationship between rrd and rfd is one map one */
1711 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1712 rrd_ring->next_to_clean)) {
1713 rrs->word3 &= ~RRS_RXD_UPDATED;
1714 if (++rrd_ring->next_to_clean == rrd_ring->count)
1715 rrd_ring->next_to_clean = 0;
1716 }
1717 }
1718
1719 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1720 struct atl1c_recv_ret_status *rrs, u16 num)
1721 {
1722 u16 i;
1723 u16 rfd_index;
1724 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1725
1726 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1727 RRS_RX_RFD_INDEX_MASK;
1728 for (i = 0; i < num; i++) {
1729 buffer_info[rfd_index].skb = NULL;
1730 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1731 ATL1C_BUFFER_FREE);
1732 if (++rfd_index == rfd_ring->count)
1733 rfd_index = 0;
1734 }
1735 rfd_ring->next_to_clean = rfd_index;
1736 }
1737
1738 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1739 int *work_done, int work_to_do)
1740 {
1741 u16 rfd_num, rfd_index;
1742 u16 count = 0;
1743 u16 length;
1744 struct pci_dev *pdev = adapter->pdev;
1745 struct net_device *netdev = adapter->netdev;
1746 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1747 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1748 struct sk_buff *skb;
1749 struct atl1c_recv_ret_status *rrs;
1750 struct atl1c_buffer *buffer_info;
1751
1752 while (1) {
1753 if (*work_done >= work_to_do)
1754 break;
1755 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1756 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1757 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1758 RRS_RX_RFD_CNT_MASK;
1759 if (unlikely(rfd_num != 1))
1760 /* TODO support mul rfd*/
1761 if (netif_msg_rx_err(adapter))
1762 dev_warn(&pdev->dev,
1763 "Multi rfd not support yet!\n");
1764 goto rrs_checked;
1765 } else {
1766 break;
1767 }
1768 rrs_checked:
1769 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1770 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1771 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1772 if (netif_msg_rx_err(adapter))
1773 dev_warn(&pdev->dev,
1774 "wrong packet! rrs word3 is %x\n",
1775 rrs->word3);
1776 continue;
1777 }
1778
1779 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1780 RRS_PKT_SIZE_MASK);
1781 /* Good Receive */
1782 if (likely(rfd_num == 1)) {
1783 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1784 RRS_RX_RFD_INDEX_MASK;
1785 buffer_info = &rfd_ring->buffer_info[rfd_index];
1786 pci_unmap_single(pdev, buffer_info->dma,
1787 buffer_info->length, PCI_DMA_FROMDEVICE);
1788 skb = buffer_info->skb;
1789 } else {
1790 /* TODO */
1791 if (netif_msg_rx_err(adapter))
1792 dev_warn(&pdev->dev,
1793 "Multi rfd not support yet!\n");
1794 break;
1795 }
1796 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1797 skb_put(skb, length - ETH_FCS_LEN);
1798 skb->protocol = eth_type_trans(skb, netdev);
1799 atl1c_rx_checksum(adapter, skb, rrs);
1800 if (rrs->word3 & RRS_VLAN_INS) {
1801 u16 vlan;
1802
1803 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1804 vlan = le16_to_cpu(vlan);
1805 __vlan_hwaccel_put_tag(skb, vlan);
1806 }
1807 netif_receive_skb(skb);
1808
1809 (*work_done)++;
1810 count++;
1811 }
1812 if (count)
1813 atl1c_alloc_rx_buffer(adapter);
1814 }
1815
1816 /*
1817 * atl1c_clean - NAPI Rx polling callback
1818 * @adapter: board private structure
1819 */
1820 static int atl1c_clean(struct napi_struct *napi, int budget)
1821 {
1822 struct atl1c_adapter *adapter =
1823 container_of(napi, struct atl1c_adapter, napi);
1824 int work_done = 0;
1825
1826 /* Keep link state information with original netdev */
1827 if (!netif_carrier_ok(adapter->netdev))
1828 goto quit_polling;
1829 /* just enable one RXQ */
1830 atl1c_clean_rx_irq(adapter, &work_done, budget);
1831
1832 if (work_done < budget) {
1833 quit_polling:
1834 napi_complete(napi);
1835 adapter->hw.intr_mask |= ISR_RX_PKT;
1836 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1837 }
1838 return work_done;
1839 }
1840
1841 #ifdef CONFIG_NET_POLL_CONTROLLER
1842
1843 /*
1844 * Polling 'interrupt' - used by things like netconsole to send skbs
1845 * without having to re-enable interrupts. It's not called while
1846 * the interrupt routine is executing.
1847 */
1848 static void atl1c_netpoll(struct net_device *netdev)
1849 {
1850 struct atl1c_adapter *adapter = netdev_priv(netdev);
1851
1852 disable_irq(adapter->pdev->irq);
1853 atl1c_intr(adapter->pdev->irq, netdev);
1854 enable_irq(adapter->pdev->irq);
1855 }
1856 #endif
1857
1858 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1859 {
1860 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1861 u16 next_to_use = 0;
1862 u16 next_to_clean = 0;
1863
1864 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1865 next_to_use = tpd_ring->next_to_use;
1866
1867 return (u16)(next_to_clean > next_to_use) ?
1868 (next_to_clean - next_to_use - 1) :
1869 (tpd_ring->count + next_to_clean - next_to_use - 1);
1870 }
1871
1872 /*
1873 * get next usable tpd
1874 * Note: should call atl1c_tdp_avail to make sure
1875 * there is enough tpd to use
1876 */
1877 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1878 enum atl1c_trans_queue type)
1879 {
1880 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1881 struct atl1c_tpd_desc *tpd_desc;
1882 u16 next_to_use = 0;
1883
1884 next_to_use = tpd_ring->next_to_use;
1885 if (++tpd_ring->next_to_use == tpd_ring->count)
1886 tpd_ring->next_to_use = 0;
1887 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1888 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1889 return tpd_desc;
1890 }
1891
1892 static struct atl1c_buffer *
1893 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1894 {
1895 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1896
1897 return &tpd_ring->buffer_info[tpd -
1898 (struct atl1c_tpd_desc *)tpd_ring->desc];
1899 }
1900
1901 /* Calculate the transmit packet descript needed*/
1902 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1903 {
1904 u16 tpd_req;
1905 u16 proto_hdr_len = 0;
1906
1907 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1908
1909 if (skb_is_gso(skb)) {
1910 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1911 if (proto_hdr_len < skb_headlen(skb))
1912 tpd_req++;
1913 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1914 tpd_req++;
1915 }
1916 return tpd_req;
1917 }
1918
1919 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1920 struct sk_buff *skb,
1921 struct atl1c_tpd_desc **tpd,
1922 enum atl1c_trans_queue type)
1923 {
1924 struct pci_dev *pdev = adapter->pdev;
1925 u8 hdr_len;
1926 u32 real_len;
1927 unsigned short offload_type;
1928 int err;
1929
1930 if (skb_is_gso(skb)) {
1931 if (skb_header_cloned(skb)) {
1932 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1933 if (unlikely(err))
1934 return -1;
1935 }
1936 offload_type = skb_shinfo(skb)->gso_type;
1937
1938 if (offload_type & SKB_GSO_TCPV4) {
1939 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1940 + ntohs(ip_hdr(skb)->tot_len));
1941
1942 if (real_len < skb->len)
1943 pskb_trim(skb, real_len);
1944
1945 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1946 if (unlikely(skb->len == hdr_len)) {
1947 /* only xsum need */
1948 if (netif_msg_tx_queued(adapter))
1949 dev_warn(&pdev->dev,
1950 "IPV4 tso with zero data??\n");
1951 goto check_sum;
1952 } else {
1953 ip_hdr(skb)->check = 0;
1954 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1955 ip_hdr(skb)->saddr,
1956 ip_hdr(skb)->daddr,
1957 0, IPPROTO_TCP, 0);
1958 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1959 }
1960 }
1961
1962 if (offload_type & SKB_GSO_TCPV6) {
1963 struct atl1c_tpd_ext_desc *etpd =
1964 *(struct atl1c_tpd_ext_desc **)(tpd);
1965
1966 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1967 *tpd = atl1c_get_tpd(adapter, type);
1968 ipv6_hdr(skb)->payload_len = 0;
1969 /* check payload == 0 byte ? */
1970 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1971 if (unlikely(skb->len == hdr_len)) {
1972 /* only xsum need */
1973 if (netif_msg_tx_queued(adapter))
1974 dev_warn(&pdev->dev,
1975 "IPV6 tso with zero data??\n");
1976 goto check_sum;
1977 } else
1978 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1979 &ipv6_hdr(skb)->saddr,
1980 &ipv6_hdr(skb)->daddr,
1981 0, IPPROTO_TCP, 0);
1982 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1983 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1984 etpd->pkt_len = cpu_to_le32(skb->len);
1985 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1986 }
1987
1988 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1989 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1990 TPD_TCPHDR_OFFSET_SHIFT;
1991 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1992 TPD_MSS_SHIFT;
1993 return 0;
1994 }
1995
1996 check_sum:
1997 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1998 u8 css, cso;
1999 cso = skb_checksum_start_offset(skb);
2000
2001 if (unlikely(cso & 0x1)) {
2002 if (netif_msg_tx_err(adapter))
2003 dev_err(&adapter->pdev->dev,
2004 "payload offset should not an event number\n");
2005 return -1;
2006 } else {
2007 css = cso + skb->csum_offset;
2008
2009 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2010 TPD_PLOADOFFSET_SHIFT;
2011 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2012 TPD_CCSUM_OFFSET_SHIFT;
2013 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2014 }
2015 }
2016 return 0;
2017 }
2018
2019 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2020 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2021 enum atl1c_trans_queue type)
2022 {
2023 struct atl1c_tpd_desc *use_tpd = NULL;
2024 struct atl1c_buffer *buffer_info = NULL;
2025 u16 buf_len = skb_headlen(skb);
2026 u16 map_len = 0;
2027 u16 mapped_len = 0;
2028 u16 hdr_len = 0;
2029 u16 nr_frags;
2030 u16 f;
2031 int tso;
2032
2033 nr_frags = skb_shinfo(skb)->nr_frags;
2034 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2035 if (tso) {
2036 /* TSO */
2037 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2038 use_tpd = tpd;
2039
2040 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2041 buffer_info->length = map_len;
2042 buffer_info->dma = pci_map_single(adapter->pdev,
2043 skb->data, hdr_len, PCI_DMA_TODEVICE);
2044 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2045 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2046 ATL1C_PCIMAP_TODEVICE);
2047 mapped_len += map_len;
2048 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2049 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2050 }
2051
2052 if (mapped_len < buf_len) {
2053 /* mapped_len == 0, means we should use the first tpd,
2054 which is given by caller */
2055 if (mapped_len == 0)
2056 use_tpd = tpd;
2057 else {
2058 use_tpd = atl1c_get_tpd(adapter, type);
2059 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2060 }
2061 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2062 buffer_info->length = buf_len - mapped_len;
2063 buffer_info->dma =
2064 pci_map_single(adapter->pdev, skb->data + mapped_len,
2065 buffer_info->length, PCI_DMA_TODEVICE);
2066 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2067 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2068 ATL1C_PCIMAP_TODEVICE);
2069 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2070 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2071 }
2072
2073 for (f = 0; f < nr_frags; f++) {
2074 struct skb_frag_struct *frag;
2075
2076 frag = &skb_shinfo(skb)->frags[f];
2077
2078 use_tpd = atl1c_get_tpd(adapter, type);
2079 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2080
2081 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2082 buffer_info->length = skb_frag_size(frag);
2083 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2084 frag, 0,
2085 buffer_info->length,
2086 DMA_TO_DEVICE);
2087 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2088 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2089 ATL1C_PCIMAP_TODEVICE);
2090 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2091 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2092 }
2093
2094 /* The last tpd */
2095 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2096 /* The last buffer info contain the skb address,
2097 so it will be free after unmap */
2098 buffer_info->skb = skb;
2099 }
2100
2101 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2102 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2103 {
2104 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2105 u16 reg;
2106
2107 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2108 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2109 }
2110
2111 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2112 struct net_device *netdev)
2113 {
2114 struct atl1c_adapter *adapter = netdev_priv(netdev);
2115 unsigned long flags;
2116 u16 tpd_req = 1;
2117 struct atl1c_tpd_desc *tpd;
2118 enum atl1c_trans_queue type = atl1c_trans_normal;
2119
2120 if (test_bit(__AT_DOWN, &adapter->flags)) {
2121 dev_kfree_skb_any(skb);
2122 return NETDEV_TX_OK;
2123 }
2124
2125 tpd_req = atl1c_cal_tpd_req(skb);
2126 if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2127 if (netif_msg_pktdata(adapter))
2128 dev_info(&adapter->pdev->dev, "tx locked\n");
2129 return NETDEV_TX_LOCKED;
2130 }
2131
2132 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2133 /* no enough descriptor, just stop queue */
2134 netif_stop_queue(netdev);
2135 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2136 return NETDEV_TX_BUSY;
2137 }
2138
2139 tpd = atl1c_get_tpd(adapter, type);
2140
2141 /* do TSO and check sum */
2142 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2143 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2144 dev_kfree_skb_any(skb);
2145 return NETDEV_TX_OK;
2146 }
2147
2148 if (unlikely(vlan_tx_tag_present(skb))) {
2149 u16 vlan = vlan_tx_tag_get(skb);
2150 __le16 tag;
2151
2152 vlan = cpu_to_le16(vlan);
2153 AT_VLAN_TO_TAG(vlan, tag);
2154 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2155 tpd->vlan_tag = tag;
2156 }
2157
2158 if (skb_network_offset(skb) != ETH_HLEN)
2159 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2160
2161 atl1c_tx_map(adapter, skb, tpd, type);
2162 atl1c_tx_queue(adapter, skb, tpd, type);
2163
2164 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2165 return NETDEV_TX_OK;
2166 }
2167
2168 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2169 {
2170 struct net_device *netdev = adapter->netdev;
2171
2172 free_irq(adapter->pdev->irq, netdev);
2173
2174 if (adapter->have_msi)
2175 pci_disable_msi(adapter->pdev);
2176 }
2177
2178 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2179 {
2180 struct pci_dev *pdev = adapter->pdev;
2181 struct net_device *netdev = adapter->netdev;
2182 int flags = 0;
2183 int err = 0;
2184
2185 adapter->have_msi = true;
2186 err = pci_enable_msi(adapter->pdev);
2187 if (err) {
2188 if (netif_msg_ifup(adapter))
2189 dev_err(&pdev->dev,
2190 "Unable to allocate MSI interrupt Error: %d\n",
2191 err);
2192 adapter->have_msi = false;
2193 }
2194
2195 if (!adapter->have_msi)
2196 flags |= IRQF_SHARED;
2197 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2198 netdev->name, netdev);
2199 if (err) {
2200 if (netif_msg_ifup(adapter))
2201 dev_err(&pdev->dev,
2202 "Unable to allocate interrupt Error: %d\n",
2203 err);
2204 if (adapter->have_msi)
2205 pci_disable_msi(adapter->pdev);
2206 return err;
2207 }
2208 if (netif_msg_ifup(adapter))
2209 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2210 return err;
2211 }
2212
2213
2214 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2215 {
2216 /* release tx-pending skbs and reset tx/rx ring index */
2217 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2218 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2219 atl1c_clean_rx_ring(adapter);
2220 }
2221
2222 static int atl1c_up(struct atl1c_adapter *adapter)
2223 {
2224 struct net_device *netdev = adapter->netdev;
2225 int err;
2226
2227 netif_carrier_off(netdev);
2228
2229 err = atl1c_configure(adapter);
2230 if (unlikely(err))
2231 goto err_up;
2232
2233 err = atl1c_request_irq(adapter);
2234 if (unlikely(err))
2235 goto err_up;
2236
2237 atl1c_check_link_status(adapter);
2238 clear_bit(__AT_DOWN, &adapter->flags);
2239 napi_enable(&adapter->napi);
2240 atl1c_irq_enable(adapter);
2241 netif_start_queue(netdev);
2242 return err;
2243
2244 err_up:
2245 atl1c_clean_rx_ring(adapter);
2246 return err;
2247 }
2248
2249 static void atl1c_down(struct atl1c_adapter *adapter)
2250 {
2251 struct net_device *netdev = adapter->netdev;
2252
2253 atl1c_del_timer(adapter);
2254 adapter->work_event = 0; /* clear all event */
2255 /* signal that we're down so the interrupt handler does not
2256 * reschedule our watchdog timer */
2257 set_bit(__AT_DOWN, &adapter->flags);
2258 netif_carrier_off(netdev);
2259 napi_disable(&adapter->napi);
2260 atl1c_irq_disable(adapter);
2261 atl1c_free_irq(adapter);
2262 /* disable ASPM if device inactive */
2263 atl1c_disable_l0s_l1(&adapter->hw);
2264 /* reset MAC to disable all RX/TX */
2265 atl1c_reset_mac(&adapter->hw);
2266 msleep(1);
2267
2268 adapter->link_speed = SPEED_0;
2269 adapter->link_duplex = -1;
2270 atl1c_reset_dma_ring(adapter);
2271 }
2272
2273 /*
2274 * atl1c_open - Called when a network interface is made active
2275 * @netdev: network interface device structure
2276 *
2277 * Returns 0 on success, negative value on failure
2278 *
2279 * The open entry point is called when a network interface is made
2280 * active by the system (IFF_UP). At this point all resources needed
2281 * for transmit and receive operations are allocated, the interrupt
2282 * handler is registered with the OS, the watchdog timer is started,
2283 * and the stack is notified that the interface is ready.
2284 */
2285 static int atl1c_open(struct net_device *netdev)
2286 {
2287 struct atl1c_adapter *adapter = netdev_priv(netdev);
2288 int err;
2289
2290 /* disallow open during test */
2291 if (test_bit(__AT_TESTING, &adapter->flags))
2292 return -EBUSY;
2293
2294 /* allocate rx/tx dma buffer & descriptors */
2295 err = atl1c_setup_ring_resources(adapter);
2296 if (unlikely(err))
2297 return err;
2298
2299 err = atl1c_up(adapter);
2300 if (unlikely(err))
2301 goto err_up;
2302
2303 return 0;
2304
2305 err_up:
2306 atl1c_free_irq(adapter);
2307 atl1c_free_ring_resources(adapter);
2308 atl1c_reset_mac(&adapter->hw);
2309 return err;
2310 }
2311
2312 /*
2313 * atl1c_close - Disables a network interface
2314 * @netdev: network interface device structure
2315 *
2316 * Returns 0, this is not allowed to fail
2317 *
2318 * The close entry point is called when an interface is de-activated
2319 * by the OS. The hardware is still under the drivers control, but
2320 * needs to be disabled. A global MAC reset is issued to stop the
2321 * hardware, and all transmit and receive resources are freed.
2322 */
2323 static int atl1c_close(struct net_device *netdev)
2324 {
2325 struct atl1c_adapter *adapter = netdev_priv(netdev);
2326
2327 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2328 set_bit(__AT_DOWN, &adapter->flags);
2329 cancel_work_sync(&adapter->common_task);
2330 atl1c_down(adapter);
2331 atl1c_free_ring_resources(adapter);
2332 return 0;
2333 }
2334
2335 static int atl1c_suspend(struct device *dev)
2336 {
2337 struct pci_dev *pdev = to_pci_dev(dev);
2338 struct net_device *netdev = pci_get_drvdata(pdev);
2339 struct atl1c_adapter *adapter = netdev_priv(netdev);
2340 struct atl1c_hw *hw = &adapter->hw;
2341 u32 wufc = adapter->wol;
2342
2343 atl1c_disable_l0s_l1(hw);
2344 if (netif_running(netdev)) {
2345 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2346 atl1c_down(adapter);
2347 }
2348 netif_device_detach(netdev);
2349
2350 if (wufc)
2351 if (atl1c_phy_to_ps_link(hw) != 0)
2352 dev_dbg(&pdev->dev, "phy power saving failed");
2353
2354 atl1c_power_saving(hw, wufc);
2355
2356 return 0;
2357 }
2358
2359 #ifdef CONFIG_PM_SLEEP
2360 static int atl1c_resume(struct device *dev)
2361 {
2362 struct pci_dev *pdev = to_pci_dev(dev);
2363 struct net_device *netdev = pci_get_drvdata(pdev);
2364 struct atl1c_adapter *adapter = netdev_priv(netdev);
2365
2366 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2367 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2368
2369 atl1c_phy_reset(&adapter->hw);
2370 atl1c_reset_mac(&adapter->hw);
2371 atl1c_phy_init(&adapter->hw);
2372
2373 #if 0
2374 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2375 pm_data &= ~PM_CTRLSTAT_PME_EN;
2376 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2377 #endif
2378
2379 netif_device_attach(netdev);
2380 if (netif_running(netdev))
2381 atl1c_up(adapter);
2382
2383 return 0;
2384 }
2385 #endif
2386
2387 static void atl1c_shutdown(struct pci_dev *pdev)
2388 {
2389 struct net_device *netdev = pci_get_drvdata(pdev);
2390 struct atl1c_adapter *adapter = netdev_priv(netdev);
2391
2392 atl1c_suspend(&pdev->dev);
2393 pci_wake_from_d3(pdev, adapter->wol);
2394 pci_set_power_state(pdev, PCI_D3hot);
2395 }
2396
2397 static const struct net_device_ops atl1c_netdev_ops = {
2398 .ndo_open = atl1c_open,
2399 .ndo_stop = atl1c_close,
2400 .ndo_validate_addr = eth_validate_addr,
2401 .ndo_start_xmit = atl1c_xmit_frame,
2402 .ndo_set_mac_address = atl1c_set_mac_addr,
2403 .ndo_set_rx_mode = atl1c_set_multi,
2404 .ndo_change_mtu = atl1c_change_mtu,
2405 .ndo_fix_features = atl1c_fix_features,
2406 .ndo_set_features = atl1c_set_features,
2407 .ndo_do_ioctl = atl1c_ioctl,
2408 .ndo_tx_timeout = atl1c_tx_timeout,
2409 .ndo_get_stats = atl1c_get_stats,
2410 #ifdef CONFIG_NET_POLL_CONTROLLER
2411 .ndo_poll_controller = atl1c_netpoll,
2412 #endif
2413 };
2414
2415 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2416 {
2417 SET_NETDEV_DEV(netdev, &pdev->dev);
2418 pci_set_drvdata(pdev, netdev);
2419
2420 netdev->netdev_ops = &atl1c_netdev_ops;
2421 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2422 atl1c_set_ethtool_ops(netdev);
2423
2424 /* TODO: add when ready */
2425 netdev->hw_features = NETIF_F_SG |
2426 NETIF_F_HW_CSUM |
2427 NETIF_F_HW_VLAN_RX |
2428 NETIF_F_TSO |
2429 NETIF_F_TSO6;
2430 netdev->features = netdev->hw_features |
2431 NETIF_F_HW_VLAN_TX;
2432 return 0;
2433 }
2434
2435 /*
2436 * atl1c_probe - Device Initialization Routine
2437 * @pdev: PCI device information struct
2438 * @ent: entry in atl1c_pci_tbl
2439 *
2440 * Returns 0 on success, negative on failure
2441 *
2442 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2443 * The OS initialization, configuring of the adapter private structure,
2444 * and a hardware reset occur.
2445 */
2446 static int __devinit atl1c_probe(struct pci_dev *pdev,
2447 const struct pci_device_id *ent)
2448 {
2449 struct net_device *netdev;
2450 struct atl1c_adapter *adapter;
2451 static int cards_found;
2452
2453 int err = 0;
2454
2455 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2456 err = pci_enable_device_mem(pdev);
2457 if (err) {
2458 dev_err(&pdev->dev, "cannot enable PCI device\n");
2459 return err;
2460 }
2461
2462 /*
2463 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2464 * shared register for the high 32 bits, so only a single, aligned,
2465 * 4 GB physical address range can be used at a time.
2466 *
2467 * Supporting 64-bit DMA on this hardware is more trouble than it's
2468 * worth. It is far easier to limit to 32-bit DMA than update
2469 * various kernel subsystems to support the mechanics required by a
2470 * fixed-high-32-bit system.
2471 */
2472 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2473 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2474 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2475 goto err_dma;
2476 }
2477
2478 err = pci_request_regions(pdev, atl1c_driver_name);
2479 if (err) {
2480 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2481 goto err_pci_reg;
2482 }
2483
2484 pci_set_master(pdev);
2485
2486 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2487 if (netdev == NULL) {
2488 err = -ENOMEM;
2489 goto err_alloc_etherdev;
2490 }
2491
2492 err = atl1c_init_netdev(netdev, pdev);
2493 if (err) {
2494 dev_err(&pdev->dev, "init netdevice failed\n");
2495 goto err_init_netdev;
2496 }
2497 adapter = netdev_priv(netdev);
2498 adapter->bd_number = cards_found;
2499 adapter->netdev = netdev;
2500 adapter->pdev = pdev;
2501 adapter->hw.adapter = adapter;
2502 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2503 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2504 if (!adapter->hw.hw_addr) {
2505 err = -EIO;
2506 dev_err(&pdev->dev, "cannot map device registers\n");
2507 goto err_ioremap;
2508 }
2509
2510 /* init mii data */
2511 adapter->mii.dev = netdev;
2512 adapter->mii.mdio_read = atl1c_mdio_read;
2513 adapter->mii.mdio_write = atl1c_mdio_write;
2514 adapter->mii.phy_id_mask = 0x1f;
2515 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2516 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2517 setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2518 (unsigned long)adapter);
2519 /* setup the private structure */
2520 err = atl1c_sw_init(adapter);
2521 if (err) {
2522 dev_err(&pdev->dev, "net device private data init failed\n");
2523 goto err_sw_init;
2524 }
2525 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2526
2527 /* Init GPHY as early as possible due to power saving issue */
2528 atl1c_phy_reset(&adapter->hw);
2529
2530 err = atl1c_reset_mac(&adapter->hw);
2531 if (err) {
2532 err = -EIO;
2533 goto err_reset;
2534 }
2535
2536 /* reset the controller to
2537 * put the device in a known good starting state */
2538 err = atl1c_phy_init(&adapter->hw);
2539 if (err) {
2540 err = -EIO;
2541 goto err_reset;
2542 }
2543 if (atl1c_read_mac_addr(&adapter->hw)) {
2544 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2545 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2546 }
2547 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2548 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2549 if (netif_msg_probe(adapter))
2550 dev_dbg(&pdev->dev, "mac address : %pM\n",
2551 adapter->hw.mac_addr);
2552
2553 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2554 INIT_WORK(&adapter->common_task, atl1c_common_task);
2555 adapter->work_event = 0;
2556 err = register_netdev(netdev);
2557 if (err) {
2558 dev_err(&pdev->dev, "register netdevice failed\n");
2559 goto err_register;
2560 }
2561
2562 if (netif_msg_probe(adapter))
2563 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2564 cards_found++;
2565 return 0;
2566
2567 err_reset:
2568 err_register:
2569 err_sw_init:
2570 iounmap(adapter->hw.hw_addr);
2571 err_init_netdev:
2572 err_ioremap:
2573 free_netdev(netdev);
2574 err_alloc_etherdev:
2575 pci_release_regions(pdev);
2576 err_pci_reg:
2577 err_dma:
2578 pci_disable_device(pdev);
2579 return err;
2580 }
2581
2582 /*
2583 * atl1c_remove - Device Removal Routine
2584 * @pdev: PCI device information struct
2585 *
2586 * atl1c_remove is called by the PCI subsystem to alert the driver
2587 * that it should release a PCI device. The could be caused by a
2588 * Hot-Plug event, or because the driver is going to be removed from
2589 * memory.
2590 */
2591 static void __devexit atl1c_remove(struct pci_dev *pdev)
2592 {
2593 struct net_device *netdev = pci_get_drvdata(pdev);
2594 struct atl1c_adapter *adapter = netdev_priv(netdev);
2595
2596 unregister_netdev(netdev);
2597 /* restore permanent address */
2598 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2599 atl1c_phy_disable(&adapter->hw);
2600
2601 iounmap(adapter->hw.hw_addr);
2602
2603 pci_release_regions(pdev);
2604 pci_disable_device(pdev);
2605 free_netdev(netdev);
2606 }
2607
2608 /*
2609 * atl1c_io_error_detected - called when PCI error is detected
2610 * @pdev: Pointer to PCI device
2611 * @state: The current pci connection state
2612 *
2613 * This function is called after a PCI bus error affecting
2614 * this device has been detected.
2615 */
2616 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2617 pci_channel_state_t state)
2618 {
2619 struct net_device *netdev = pci_get_drvdata(pdev);
2620 struct atl1c_adapter *adapter = netdev_priv(netdev);
2621
2622 netif_device_detach(netdev);
2623
2624 if (state == pci_channel_io_perm_failure)
2625 return PCI_ERS_RESULT_DISCONNECT;
2626
2627 if (netif_running(netdev))
2628 atl1c_down(adapter);
2629
2630 pci_disable_device(pdev);
2631
2632 /* Request a slot slot reset. */
2633 return PCI_ERS_RESULT_NEED_RESET;
2634 }
2635
2636 /*
2637 * atl1c_io_slot_reset - called after the pci bus has been reset.
2638 * @pdev: Pointer to PCI device
2639 *
2640 * Restart the card from scratch, as if from a cold-boot. Implementation
2641 * resembles the first-half of the e1000_resume routine.
2642 */
2643 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2644 {
2645 struct net_device *netdev = pci_get_drvdata(pdev);
2646 struct atl1c_adapter *adapter = netdev_priv(netdev);
2647
2648 if (pci_enable_device(pdev)) {
2649 if (netif_msg_hw(adapter))
2650 dev_err(&pdev->dev,
2651 "Cannot re-enable PCI device after reset\n");
2652 return PCI_ERS_RESULT_DISCONNECT;
2653 }
2654 pci_set_master(pdev);
2655
2656 pci_enable_wake(pdev, PCI_D3hot, 0);
2657 pci_enable_wake(pdev, PCI_D3cold, 0);
2658
2659 atl1c_reset_mac(&adapter->hw);
2660
2661 return PCI_ERS_RESULT_RECOVERED;
2662 }
2663
2664 /*
2665 * atl1c_io_resume - called when traffic can start flowing again.
2666 * @pdev: Pointer to PCI device
2667 *
2668 * This callback is called when the error recovery driver tells us that
2669 * its OK to resume normal operation. Implementation resembles the
2670 * second-half of the atl1c_resume routine.
2671 */
2672 static void atl1c_io_resume(struct pci_dev *pdev)
2673 {
2674 struct net_device *netdev = pci_get_drvdata(pdev);
2675 struct atl1c_adapter *adapter = netdev_priv(netdev);
2676
2677 if (netif_running(netdev)) {
2678 if (atl1c_up(adapter)) {
2679 if (netif_msg_hw(adapter))
2680 dev_err(&pdev->dev,
2681 "Cannot bring device back up after reset\n");
2682 return;
2683 }
2684 }
2685
2686 netif_device_attach(netdev);
2687 }
2688
2689 static struct pci_error_handlers atl1c_err_handler = {
2690 .error_detected = atl1c_io_error_detected,
2691 .slot_reset = atl1c_io_slot_reset,
2692 .resume = atl1c_io_resume,
2693 };
2694
2695 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2696
2697 static struct pci_driver atl1c_driver = {
2698 .name = atl1c_driver_name,
2699 .id_table = atl1c_pci_tbl,
2700 .probe = atl1c_probe,
2701 .remove = __devexit_p(atl1c_remove),
2702 .shutdown = atl1c_shutdown,
2703 .err_handler = &atl1c_err_handler,
2704 .driver.pm = &atl1c_pm_ops,
2705 };
2706
2707 /*
2708 * atl1c_init_module - Driver Registration Routine
2709 *
2710 * atl1c_init_module is the first routine called when the driver is
2711 * loaded. All it does is register with the PCI subsystem.
2712 */
2713 static int __init atl1c_init_module(void)
2714 {
2715 return pci_register_driver(&atl1c_driver);
2716 }
2717
2718 /*
2719 * atl1c_exit_module - Driver Exit Cleanup Routine
2720 *
2721 * atl1c_exit_module is called just before the driver is removed
2722 * from memory.
2723 */
2724 static void __exit atl1c_exit_module(void)
2725 {
2726 pci_unregister_driver(&atl1c_driver);
2727 }
2728
2729 module_init(atl1c_init_module);
2730 module_exit(atl1c_exit_module);
Linux kernel - Deliverables
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