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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / ethernet / atheros / atl1c / atl1c_main.c
blob00bd7bd557940c8c0f9c681a4d16bfbf8ad56cb9
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
4 *
5 * Derived from Intel e1000 driver
6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
7 */
8
9 #include "atl1c.h"
10
11 char atl1c_driver_name[] = "atl1c";
12
13 /*
14 * atl1c_pci_tbl - PCI Device ID Table
15 *
16 * Wildcard entries (PCI_ANY_ID) should come last
17 * Last entry must be all 0s
18 *
19 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
20 * Class, Class Mask, private data (not used) }
21 */
22 static const struct pci_device_id atl1c_pci_tbl[] = {
23 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
24 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
25 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
26 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
27 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
28 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
29 /* required last entry */
30 { 0 }
31 };
32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
33
34 MODULE_AUTHOR("Jie Yang");
35 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
37 MODULE_LICENSE("GPL");
38
39 static int atl1c_stop_mac(struct atl1c_hw *hw);
40 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
41 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
42 static void atl1c_start_mac(struct atl1c_adapter *adapter);
43 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
44 int *work_done, int work_to_do);
45 static int atl1c_up(struct atl1c_adapter *adapter);
46 static void atl1c_down(struct atl1c_adapter *adapter);
47 static int atl1c_reset_mac(struct atl1c_hw *hw);
48 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
49 static int atl1c_configure(struct atl1c_adapter *adapter);
50 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
51
52
53 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
54 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
55 static void atl1c_pcie_patch(struct atl1c_hw *hw)
56 {
57 u32 mst_data, data;
58
59 /* pclk sel could switch to 25M */
60 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
61 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
62 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
63
64 /* WoL/PCIE related settings */
65 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
66 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
67 data |= PCIE_PHYMISC_FORCE_RCV_DET;
68 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
69 } else { /* new dev set bit5 of MASTER */
70 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
71 AT_WRITE_REG(hw, REG_MASTER_CTRL,
72 mst_data | MASTER_CTRL_WAKEN_25M);
73 }
74 /* aspm/PCIE setting only for l2cb 1.0 */
75 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
76 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
77 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
78 L2CB1_PCIE_PHYMISC2_CDR_BW);
79 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
80 L2CB1_PCIE_PHYMISC2_L0S_TH);
81 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
82 /* extend L1 sync timer */
83 AT_READ_REG(hw, REG_LINK_CTRL, &data);
84 data |= LINK_CTRL_EXT_SYNC;
85 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
86 }
87 /* l2cb 1.x & l1d 1.x */
88 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
89 AT_READ_REG(hw, REG_PM_CTRL, &data);
90 data |= PM_CTRL_L0S_BUFSRX_EN;
91 AT_WRITE_REG(hw, REG_PM_CTRL, data);
92 /* clear vendor msg */
93 AT_READ_REG(hw, REG_DMA_DBG, &data);
94 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
95 }
96 }
97
98 /* FIXME: no need any more ? */
99 /*
100 * atl1c_init_pcie - init PCIE module
101 */
102 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
103 {
104 u32 data;
105 u32 pci_cmd;
106 struct pci_dev *pdev = hw->adapter->pdev;
107 int pos;
108
109 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
110 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
111 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
112 PCI_COMMAND_IO);
113 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
114
115 /*
116 * Clear any PowerSaveing Settings
117 */
118 pci_enable_wake(pdev, PCI_D3hot, 0);
119 pci_enable_wake(pdev, PCI_D3cold, 0);
120 /* wol sts read-clear */
121 AT_READ_REG(hw, REG_WOL_CTRL, &data);
122 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
123
124 /*
125 * Mask some pcie error bits
126 */
127 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
128 if (pos) {
129 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
130 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
131 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
132 }
133 /* clear error status */
134 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
135 PCI_EXP_DEVSTA_NFED |
136 PCI_EXP_DEVSTA_FED |
137 PCI_EXP_DEVSTA_CED |
138 PCI_EXP_DEVSTA_URD);
139
140 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
141 data &= ~LTSSM_ID_EN_WRO;
142 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
143
144 atl1c_pcie_patch(hw);
145 if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
146 atl1c_disable_l0s_l1(hw);
147
148 msleep(5);
149 }
150
151 /**
152 * atl1c_irq_enable - Enable default interrupt generation settings
153 * @adapter: board private structure
154 */
155 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
156 {
157 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
158 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
159 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
160 AT_WRITE_FLUSH(&adapter->hw);
161 }
162 }
163
164 /**
165 * atl1c_irq_disable - Mask off interrupt generation on the NIC
166 * @adapter: board private structure
167 */
168 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
169 {
170 atomic_inc(&adapter->irq_sem);
171 AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
172 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
173 AT_WRITE_FLUSH(&adapter->hw);
174 synchronize_irq(adapter->pdev->irq);
175 }
176
177 /**
178 * atl1c_irq_reset - reset interrupt confiure on the NIC
179 * @adapter: board private structure
180 */
181 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
182 {
183 atomic_set(&adapter->irq_sem, 1);
184 atl1c_irq_enable(adapter);
185 }
186
187 /*
188 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
189 * of the idle status register until the device is actually idle
190 */
191 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
192 {
193 int timeout;
194 u32 data;
195
196 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
197 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
198 if ((data & modu_ctrl) == 0)
199 return 0;
200 msleep(1);
201 }
202 return data;
203 }
204
205 /**
206 * atl1c_phy_config - Timer Call-back
207 * @data: pointer to netdev cast into an unsigned long
208 */
209 static void atl1c_phy_config(struct timer_list *t)
210 {
211 struct atl1c_adapter *adapter = from_timer(adapter, t,
212 phy_config_timer);
213 struct atl1c_hw *hw = &adapter->hw;
214 unsigned long flags;
215
216 spin_lock_irqsave(&adapter->mdio_lock, flags);
217 atl1c_restart_autoneg(hw);
218 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
219 }
220
221 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
222 {
223 WARN_ON(in_interrupt());
224 atl1c_down(adapter);
225 atl1c_up(adapter);
226 clear_bit(__AT_RESETTING, &adapter->flags);
227 }
228
229 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
230 {
231 struct atl1c_hw *hw = &adapter->hw;
232 struct net_device *netdev = adapter->netdev;
233 struct pci_dev *pdev = adapter->pdev;
234 int err;
235 unsigned long flags;
236 u16 speed, duplex, phy_data;
237
238 spin_lock_irqsave(&adapter->mdio_lock, flags);
239 /* MII_BMSR must read twise */
240 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
241 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
242 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
243
244 if ((phy_data & BMSR_LSTATUS) == 0) {
245 /* link down */
246 netif_carrier_off(netdev);
247 hw->hibernate = true;
248 if (atl1c_reset_mac(hw) != 0)
249 if (netif_msg_hw(adapter))
250 dev_warn(&pdev->dev, "reset mac failed\n");
251 atl1c_set_aspm(hw, SPEED_0);
252 atl1c_post_phy_linkchg(hw, SPEED_0);
253 atl1c_reset_dma_ring(adapter);
254 atl1c_configure(adapter);
255 } else {
256 /* Link Up */
257 hw->hibernate = false;
258 spin_lock_irqsave(&adapter->mdio_lock, flags);
259 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
260 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
261 if (unlikely(err))
262 return;
263 /* link result is our setting */
264 if (adapter->link_speed != speed ||
265 adapter->link_duplex != duplex) {
266 adapter->link_speed = speed;
267 adapter->link_duplex = duplex;
268 atl1c_set_aspm(hw, speed);
269 atl1c_post_phy_linkchg(hw, speed);
270 atl1c_start_mac(adapter);
271 if (netif_msg_link(adapter))
272 dev_info(&pdev->dev,
273 "%s: %s NIC Link is Up<%d Mbps %s>\n",
274 atl1c_driver_name, netdev->name,
275 adapter->link_speed,
276 adapter->link_duplex == FULL_DUPLEX ?
277 "Full Duplex" : "Half Duplex");
278 }
279 if (!netif_carrier_ok(netdev))
280 netif_carrier_on(netdev);
281 }
282 }
283
284 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
285 {
286 struct net_device *netdev = adapter->netdev;
287 struct pci_dev *pdev = adapter->pdev;
288 u16 phy_data;
289 u16 link_up;
290
291 spin_lock(&adapter->mdio_lock);
292 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
293 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
294 spin_unlock(&adapter->mdio_lock);
295 link_up = phy_data & BMSR_LSTATUS;
296 /* notify upper layer link down ASAP */
297 if (!link_up) {
298 if (netif_carrier_ok(netdev)) {
299 /* old link state: Up */
300 netif_carrier_off(netdev);
301 if (netif_msg_link(adapter))
302 dev_info(&pdev->dev,
303 "%s: %s NIC Link is Down\n",
304 atl1c_driver_name, netdev->name);
305 adapter->link_speed = SPEED_0;
306 }
307 }
308
309 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
310 schedule_work(&adapter->common_task);
311 }
312
313 static void atl1c_common_task(struct work_struct *work)
314 {
315 struct atl1c_adapter *adapter;
316 struct net_device *netdev;
317
318 adapter = container_of(work, struct atl1c_adapter, common_task);
319 netdev = adapter->netdev;
320
321 if (test_bit(__AT_DOWN, &adapter->flags))
322 return;
323
324 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
325 netif_device_detach(netdev);
326 atl1c_down(adapter);
327 atl1c_up(adapter);
328 netif_device_attach(netdev);
329 }
330
331 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
332 &adapter->work_event)) {
333 atl1c_irq_disable(adapter);
334 atl1c_check_link_status(adapter);
335 atl1c_irq_enable(adapter);
336 }
337 }
338
339
340 static void atl1c_del_timer(struct atl1c_adapter *adapter)
341 {
342 del_timer_sync(&adapter->phy_config_timer);
343 }
344
345
346 /**
347 * atl1c_tx_timeout - Respond to a Tx Hang
348 * @netdev: network interface device structure
349 */
350 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue)
351 {
352 struct atl1c_adapter *adapter = netdev_priv(netdev);
353
354 /* Do the reset outside of interrupt context */
355 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
356 schedule_work(&adapter->common_task);
357 }
358
359 /**
360 * atl1c_set_multi - Multicast and Promiscuous mode set
361 * @netdev: network interface device structure
362 *
363 * The set_multi entry point is called whenever the multicast address
364 * list or the network interface flags are updated. This routine is
365 * responsible for configuring the hardware for proper multicast,
366 * promiscuous mode, and all-multi behavior.
367 */
368 static void atl1c_set_multi(struct net_device *netdev)
369 {
370 struct atl1c_adapter *adapter = netdev_priv(netdev);
371 struct atl1c_hw *hw = &adapter->hw;
372 struct netdev_hw_addr *ha;
373 u32 mac_ctrl_data;
374 u32 hash_value;
375
376 /* Check for Promiscuous and All Multicast modes */
377 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
378
379 if (netdev->flags & IFF_PROMISC) {
380 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
381 } else if (netdev->flags & IFF_ALLMULTI) {
382 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
383 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
384 } else {
385 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
386 }
387
388 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
389
390 /* clear the old settings from the multicast hash table */
391 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
392 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
393
394 /* comoute mc addresses' hash value ,and put it into hash table */
395 netdev_for_each_mc_addr(ha, netdev) {
396 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
397 atl1c_hash_set(hw, hash_value);
398 }
399 }
400
401 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
402 {
403 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
404 /* enable VLAN tag insert/strip */
405 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
406 } else {
407 /* disable VLAN tag insert/strip */
408 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
409 }
410 }
411
412 static void atl1c_vlan_mode(struct net_device *netdev,
413 netdev_features_t features)
414 {
415 struct atl1c_adapter *adapter = netdev_priv(netdev);
416 struct pci_dev *pdev = adapter->pdev;
417 u32 mac_ctrl_data = 0;
418
419 if (netif_msg_pktdata(adapter))
420 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
421
422 atl1c_irq_disable(adapter);
423 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
424 __atl1c_vlan_mode(features, &mac_ctrl_data);
425 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
426 atl1c_irq_enable(adapter);
427 }
428
429 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
430 {
431 struct pci_dev *pdev = adapter->pdev;
432
433 if (netif_msg_pktdata(adapter))
434 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
435 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
436 }
437
438 /**
439 * atl1c_set_mac - Change the Ethernet Address of the NIC
440 * @netdev: network interface device structure
441 * @p: pointer to an address structure
442 *
443 * Returns 0 on success, negative on failure
444 */
445 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
446 {
447 struct atl1c_adapter *adapter = netdev_priv(netdev);
448 struct sockaddr *addr = p;
449
450 if (!is_valid_ether_addr(addr->sa_data))
451 return -EADDRNOTAVAIL;
452
453 if (netif_running(netdev))
454 return -EBUSY;
455
456 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
457 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
458
459 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
460
461 return 0;
462 }
463
464 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
465 struct net_device *dev)
466 {
467 unsigned int head_size;
468 int mtu = dev->mtu;
469
470 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
471 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
472
473 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
474 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
475 adapter->rx_frag_size = roundup_pow_of_two(head_size);
476 }
477
478 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
479 netdev_features_t features)
480 {
481 /*
482 * Since there is no support for separate rx/tx vlan accel
483 * enable/disable make sure tx flag is always in same state as rx.
484 */
485 if (features & NETIF_F_HW_VLAN_CTAG_RX)
486 features |= NETIF_F_HW_VLAN_CTAG_TX;
487 else
488 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
489
490 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
491 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
492
493 return features;
494 }
495
496 static int atl1c_set_features(struct net_device *netdev,
497 netdev_features_t features)
498 {
499 netdev_features_t changed = netdev->features ^ features;
500
501 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
502 atl1c_vlan_mode(netdev, features);
503
504 return 0;
505 }
506
507 static void atl1c_set_max_mtu(struct net_device *netdev)
508 {
509 struct atl1c_adapter *adapter = netdev_priv(netdev);
510 struct atl1c_hw *hw = &adapter->hw;
511
512 switch (hw->nic_type) {
513 /* These (GbE) devices support jumbo packets, max_mtu 6122 */
514 case athr_l1c:
515 case athr_l1d:
516 case athr_l1d_2:
517 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
518 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
519 break;
520 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
521 default:
522 netdev->max_mtu = ETH_DATA_LEN;
523 break;
524 }
525 }
526
527 /**
528 * atl1c_change_mtu - Change the Maximum Transfer Unit
529 * @netdev: network interface device structure
530 * @new_mtu: new value for maximum frame size
531 *
532 * Returns 0 on success, negative on failure
533 */
534 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
535 {
536 struct atl1c_adapter *adapter = netdev_priv(netdev);
537
538 /* set MTU */
539 if (netif_running(netdev)) {
540 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
541 msleep(1);
542 netdev->mtu = new_mtu;
543 adapter->hw.max_frame_size = new_mtu;
544 atl1c_set_rxbufsize(adapter, netdev);
545 atl1c_down(adapter);
546 netdev_update_features(netdev);
547 atl1c_up(adapter);
548 clear_bit(__AT_RESETTING, &adapter->flags);
549 }
550 return 0;
551 }
552
553 /*
554 * caller should hold mdio_lock
555 */
556 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
557 {
558 struct atl1c_adapter *adapter = netdev_priv(netdev);
559 u16 result;
560
561 atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
562 return result;
563 }
564
565 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
566 int reg_num, int val)
567 {
568 struct atl1c_adapter *adapter = netdev_priv(netdev);
569
570 atl1c_write_phy_reg(&adapter->hw, reg_num, val);
571 }
572
573 static int atl1c_mii_ioctl(struct net_device *netdev,
574 struct ifreq *ifr, int cmd)
575 {
576 struct atl1c_adapter *adapter = netdev_priv(netdev);
577 struct pci_dev *pdev = adapter->pdev;
578 struct mii_ioctl_data *data = if_mii(ifr);
579 unsigned long flags;
580 int retval = 0;
581
582 if (!netif_running(netdev))
583 return -EINVAL;
584
585 spin_lock_irqsave(&adapter->mdio_lock, flags);
586 switch (cmd) {
587 case SIOCGMIIPHY:
588 data->phy_id = 0;
589 break;
590
591 case SIOCGMIIREG:
592 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
593 &data->val_out)) {
594 retval = -EIO;
595 goto out;
596 }
597 break;
598
599 case SIOCSMIIREG:
600 if (data->reg_num & ~(0x1F)) {
601 retval = -EFAULT;
602 goto out;
603 }
604
605 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
606 data->reg_num, data->val_in);
607 if (atl1c_write_phy_reg(&adapter->hw,
608 data->reg_num, data->val_in)) {
609 retval = -EIO;
610 goto out;
611 }
612 break;
613
614 default:
615 retval = -EOPNOTSUPP;
616 break;
617 }
618 out:
619 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
620 return retval;
621 }
622
623 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
624 {
625 switch (cmd) {
626 case SIOCGMIIPHY:
627 case SIOCGMIIREG:
628 case SIOCSMIIREG:
629 return atl1c_mii_ioctl(netdev, ifr, cmd);
630 default:
631 return -EOPNOTSUPP;
632 }
633 }
634
635 /**
636 * atl1c_alloc_queues - Allocate memory for all rings
637 * @adapter: board private structure to initialize
638 *
639 */
640 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
641 {
642 return 0;
643 }
644
645 static void atl1c_set_mac_type(struct atl1c_hw *hw)
646 {
647 switch (hw->device_id) {
648 case PCI_DEVICE_ID_ATTANSIC_L2C:
649 hw->nic_type = athr_l2c;
650 break;
651 case PCI_DEVICE_ID_ATTANSIC_L1C:
652 hw->nic_type = athr_l1c;
653 break;
654 case PCI_DEVICE_ID_ATHEROS_L2C_B:
655 hw->nic_type = athr_l2c_b;
656 break;
657 case PCI_DEVICE_ID_ATHEROS_L2C_B2:
658 hw->nic_type = athr_l2c_b2;
659 break;
660 case PCI_DEVICE_ID_ATHEROS_L1D:
661 hw->nic_type = athr_l1d;
662 break;
663 case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
664 hw->nic_type = athr_l1d_2;
665 break;
666 default:
667 break;
668 }
669 }
670
671 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
672 {
673 u32 link_ctrl_data;
674
675 atl1c_set_mac_type(hw);
676 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
677
678 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE |
679 ATL1C_TXQ_MODE_ENHANCE;
680 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
681 ATL1C_ASPM_L1_SUPPORT;
682 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
683
684 if (hw->nic_type == athr_l1c ||
685 hw->nic_type == athr_l1d ||
686 hw->nic_type == athr_l1d_2)
687 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
688 return 0;
689 }
690
691 struct atl1c_platform_patch {
692 u16 pci_did;
693 u8 pci_revid;
694 u16 subsystem_vid;
695 u16 subsystem_did;
696 u32 patch_flag;
697 #define ATL1C_LINK_PATCH 0x1
698 };
699 static const struct atl1c_platform_patch plats[] = {
700 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
701 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
702 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
703 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
704 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
705 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
706 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
707 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
708 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
709 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
710 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
711 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
712 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
713 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
714 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
715 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
716 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
717 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
718 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
719 {0},
720 };
721
722 static void atl1c_patch_assign(struct atl1c_hw *hw)
723 {
724 struct pci_dev *pdev = hw->adapter->pdev;
725 u32 misc_ctrl;
726 int i = 0;
727
728 hw->msi_lnkpatch = false;
729
730 while (plats[i].pci_did != 0) {
731 if (plats[i].pci_did == hw->device_id &&
732 plats[i].pci_revid == hw->revision_id &&
733 plats[i].subsystem_vid == hw->subsystem_vendor_id &&
734 plats[i].subsystem_did == hw->subsystem_id) {
735 if (plats[i].patch_flag & ATL1C_LINK_PATCH)
736 hw->msi_lnkpatch = true;
737 }
738 i++;
739 }
740
741 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
742 hw->revision_id == L2CB_V21) {
743 /* config access mode */
744 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
745 REG_PCIE_DEV_MISC_CTRL);
746 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
747 misc_ctrl &= ~0x100;
748 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
749 REG_PCIE_DEV_MISC_CTRL);
750 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
751 }
752 }
753 /**
754 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
755 * @adapter: board private structure to initialize
756 *
757 * atl1c_sw_init initializes the Adapter private data structure.
758 * Fields are initialized based on PCI device information and
759 * OS network device settings (MTU size).
760 */
761 static int atl1c_sw_init(struct atl1c_adapter *adapter)
762 {
763 struct atl1c_hw *hw = &adapter->hw;
764 struct pci_dev *pdev = adapter->pdev;
765 u32 revision;
766
767
768 adapter->wol = 0;
769 device_set_wakeup_enable(&pdev->dev, false);
770 adapter->link_speed = SPEED_0;
771 adapter->link_duplex = FULL_DUPLEX;
772 adapter->tpd_ring[0].count = 1024;
773 adapter->rfd_ring.count = 512;
774
775 hw->vendor_id = pdev->vendor;
776 hw->device_id = pdev->device;
777 hw->subsystem_vendor_id = pdev->subsystem_vendor;
778 hw->subsystem_id = pdev->subsystem_device;
779 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
780 hw->revision_id = revision & 0xFF;
781 /* before link up, we assume hibernate is true */
782 hw->hibernate = true;
783 hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
784 if (atl1c_setup_mac_funcs(hw) != 0) {
785 dev_err(&pdev->dev, "set mac function pointers failed\n");
786 return -1;
787 }
788 atl1c_patch_assign(hw);
789
790 hw->intr_mask = IMR_NORMAL_MASK;
791 hw->phy_configured = false;
792 hw->preamble_len = 7;
793 hw->max_frame_size = adapter->netdev->mtu;
794 hw->autoneg_advertised = ADVERTISED_Autoneg;
795 hw->indirect_tab = 0xE4E4E4E4;
796 hw->base_cpu = 0;
797
798 hw->ict = 50000; /* 100ms */
799 hw->smb_timer = 200000; /* 400ms */
800 hw->rx_imt = 200;
801 hw->tx_imt = 1000;
802
803 hw->tpd_burst = 5;
804 hw->rfd_burst = 8;
805 hw->dma_order = atl1c_dma_ord_out;
806 hw->dmar_block = atl1c_dma_req_1024;
807
808 if (atl1c_alloc_queues(adapter)) {
809 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
810 return -ENOMEM;
811 }
812 /* TODO */
813 atl1c_set_rxbufsize(adapter, adapter->netdev);
814 atomic_set(&adapter->irq_sem, 1);
815 spin_lock_init(&adapter->mdio_lock);
816 set_bit(__AT_DOWN, &adapter->flags);
817
818 return 0;
819 }
820
821 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
822 struct atl1c_buffer *buffer_info)
823 {
824 u16 pci_driection;
825 if (buffer_info->flags & ATL1C_BUFFER_FREE)
826 return;
827 if (buffer_info->dma) {
828 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
829 pci_driection = PCI_DMA_FROMDEVICE;
830 else
831 pci_driection = PCI_DMA_TODEVICE;
832
833 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
834 pci_unmap_single(pdev, buffer_info->dma,
835 buffer_info->length, pci_driection);
836 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
837 pci_unmap_page(pdev, buffer_info->dma,
838 buffer_info->length, pci_driection);
839 }
840 if (buffer_info->skb)
841 dev_consume_skb_any(buffer_info->skb);
842 buffer_info->dma = 0;
843 buffer_info->skb = NULL;
844 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
845 }
846 /**
847 * atl1c_clean_tx_ring - Free Tx-skb
848 * @adapter: board private structure
849 */
850 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
851 enum atl1c_trans_queue type)
852 {
853 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
854 struct atl1c_buffer *buffer_info;
855 struct pci_dev *pdev = adapter->pdev;
856 u16 index, ring_count;
857
858 ring_count = tpd_ring->count;
859 for (index = 0; index < ring_count; index++) {
860 buffer_info = &tpd_ring->buffer_info[index];
861 atl1c_clean_buffer(pdev, buffer_info);
862 }
863
864 netdev_reset_queue(adapter->netdev);
865
866 /* Zero out Tx-buffers */
867 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
868 ring_count);
869 atomic_set(&tpd_ring->next_to_clean, 0);
870 tpd_ring->next_to_use = 0;
871 }
872
873 /**
874 * atl1c_clean_rx_ring - Free rx-reservation skbs
875 * @adapter: board private structure
876 */
877 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
878 {
879 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
880 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
881 struct atl1c_buffer *buffer_info;
882 struct pci_dev *pdev = adapter->pdev;
883 int j;
884
885 for (j = 0; j < rfd_ring->count; j++) {
886 buffer_info = &rfd_ring->buffer_info[j];
887 atl1c_clean_buffer(pdev, buffer_info);
888 }
889 /* zero out the descriptor ring */
890 memset(rfd_ring->desc, 0, rfd_ring->size);
891 rfd_ring->next_to_clean = 0;
892 rfd_ring->next_to_use = 0;
893 rrd_ring->next_to_use = 0;
894 rrd_ring->next_to_clean = 0;
895 }
896
897 /*
898 * Read / Write Ptr Initialize:
899 */
900 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
901 {
902 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
903 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
904 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
905 struct atl1c_buffer *buffer_info;
906 int i, j;
907
908 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
909 tpd_ring[i].next_to_use = 0;
910 atomic_set(&tpd_ring[i].next_to_clean, 0);
911 buffer_info = tpd_ring[i].buffer_info;
912 for (j = 0; j < tpd_ring->count; j++)
913 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
914 ATL1C_BUFFER_FREE);
915 }
916 rfd_ring->next_to_use = 0;
917 rfd_ring->next_to_clean = 0;
918 rrd_ring->next_to_use = 0;
919 rrd_ring->next_to_clean = 0;
920 for (j = 0; j < rfd_ring->count; j++) {
921 buffer_info = &rfd_ring->buffer_info[j];
922 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
923 }
924 }
925
926 /**
927 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
928 * @adapter: board private structure
929 *
930 * Free all transmit software resources
931 */
932 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
933 {
934 struct pci_dev *pdev = adapter->pdev;
935
936 pci_free_consistent(pdev, adapter->ring_header.size,
937 adapter->ring_header.desc,
938 adapter->ring_header.dma);
939 adapter->ring_header.desc = NULL;
940
941 /* Note: just free tdp_ring.buffer_info,
942 * it contain rfd_ring.buffer_info, do not double free */
943 if (adapter->tpd_ring[0].buffer_info) {
944 kfree(adapter->tpd_ring[0].buffer_info);
945 adapter->tpd_ring[0].buffer_info = NULL;
946 }
947 if (adapter->rx_page) {
948 put_page(adapter->rx_page);
949 adapter->rx_page = NULL;
950 }
951 }
952
953 /**
954 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
955 * @adapter: board private structure
956 *
957 * Return 0 on success, negative on failure
958 */
959 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
960 {
961 struct pci_dev *pdev = adapter->pdev;
962 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
963 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
964 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
965 struct atl1c_ring_header *ring_header = &adapter->ring_header;
966 int size;
967 int i;
968 int count = 0;
969 int rx_desc_count = 0;
970 u32 offset = 0;
971
972 rrd_ring->count = rfd_ring->count;
973 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
974 tpd_ring[i].count = tpd_ring[0].count;
975
976 /* 2 tpd queue, one high priority queue,
977 * another normal priority queue */
978 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
979 rfd_ring->count);
980 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
981 if (unlikely(!tpd_ring->buffer_info))
982 goto err_nomem;
983
984 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
985 tpd_ring[i].buffer_info =
986 (tpd_ring->buffer_info + count);
987 count += tpd_ring[i].count;
988 }
989
990 rfd_ring->buffer_info =
991 (tpd_ring->buffer_info + count);
992 count += rfd_ring->count;
993 rx_desc_count += rfd_ring->count;
994
995 /*
996 * real ring DMA buffer
997 * each ring/block may need up to 8 bytes for alignment, hence the
998 * additional bytes tacked onto the end.
999 */
1000 ring_header->size = size =
1001 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1002 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1003 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1004 8 * 4;
1005
1006 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1007 &ring_header->dma, GFP_KERNEL);
1008 if (unlikely(!ring_header->desc)) {
1009 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1010 goto err_nomem;
1011 }
1012 /* init TPD ring */
1013
1014 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1015 offset = tpd_ring[0].dma - ring_header->dma;
1016 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1017 tpd_ring[i].dma = ring_header->dma + offset;
1018 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1019 tpd_ring[i].size =
1020 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1021 offset += roundup(tpd_ring[i].size, 8);
1022 }
1023 /* init RFD ring */
1024 rfd_ring->dma = ring_header->dma + offset;
1025 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1026 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1027 offset += roundup(rfd_ring->size, 8);
1028
1029 /* init RRD ring */
1030 rrd_ring->dma = ring_header->dma + offset;
1031 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1032 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1033 rrd_ring->count;
1034 offset += roundup(rrd_ring->size, 8);
1035
1036 return 0;
1037
1038 err_nomem:
1039 kfree(tpd_ring->buffer_info);
1040 return -ENOMEM;
1041 }
1042
1043 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1044 {
1045 struct atl1c_hw *hw = &adapter->hw;
1046 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1047 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1048 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1049 adapter->tpd_ring;
1050
1051 /* TPD */
1052 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1053 (u32)((tpd_ring[atl1c_trans_normal].dma &
1054 AT_DMA_HI_ADDR_MASK) >> 32));
1055 /* just enable normal priority TX queue */
1056 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1057 (u32)(tpd_ring[atl1c_trans_normal].dma &
1058 AT_DMA_LO_ADDR_MASK));
1059 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1060 (u32)(tpd_ring[atl1c_trans_high].dma &
1061 AT_DMA_LO_ADDR_MASK));
1062 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1063 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1064
1065
1066 /* RFD */
1067 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1068 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1069 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1070 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1071
1072 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1073 rfd_ring->count & RFD_RING_SIZE_MASK);
1074 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1075 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1076
1077 /* RRD */
1078 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1079 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1080 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1081 (rrd_ring->count & RRD_RING_SIZE_MASK));
1082
1083 if (hw->nic_type == athr_l2c_b) {
1084 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1085 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1086 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1087 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1088 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1089 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1090 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1091 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1092 }
1093 /* Load all of base address above */
1094 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1095 }
1096
1097 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1098 {
1099 struct atl1c_hw *hw = &adapter->hw;
1100 int max_pay_load;
1101 u16 tx_offload_thresh;
1102 u32 txq_ctrl_data;
1103
1104 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1105 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1106 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1107 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1108 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1109 /*
1110 * if BIOS had changed the dam-read-max-length to an invalid value,
1111 * restore it to default value
1112 */
1113 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1114 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1115 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1116 }
1117 txq_ctrl_data =
1118 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1119 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1120
1121 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1122 }
1123
1124 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1125 {
1126 struct atl1c_hw *hw = &adapter->hw;
1127 u32 rxq_ctrl_data;
1128
1129 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1130 RXQ_RFD_BURST_NUM_SHIFT;
1131
1132 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1133 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1134
1135 /* aspm for gigabit */
1136 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1137 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1138 ASPM_THRUPUT_LIMIT_100M);
1139
1140 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1141 }
1142
1143 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1144 {
1145 struct atl1c_hw *hw = &adapter->hw;
1146 u32 dma_ctrl_data;
1147
1148 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1149 DMA_CTRL_RREQ_PRI_DATA |
1150 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1151 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1152 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1153
1154 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1155 }
1156
1157 /*
1158 * Stop the mac, transmit and receive units
1159 * hw - Struct containing variables accessed by shared code
1160 * return : 0 or idle status (if error)
1161 */
1162 static int atl1c_stop_mac(struct atl1c_hw *hw)
1163 {
1164 u32 data;
1165
1166 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1167 data &= ~RXQ_CTRL_EN;
1168 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1169
1170 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1171 data &= ~TXQ_CTRL_EN;
1172 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1173
1174 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1175
1176 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1177 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1178 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1179
1180 return (int)atl1c_wait_until_idle(hw,
1181 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1182 }
1183
1184 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1185 {
1186 struct atl1c_hw *hw = &adapter->hw;
1187 u32 mac, txq, rxq;
1188
1189 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1190 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1191 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1192
1193 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1194 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1195 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1196
1197 txq |= TXQ_CTRL_EN;
1198 rxq |= RXQ_CTRL_EN;
1199 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1200 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1201 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1202 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1203 MAC_CTRL_HASH_ALG_CRC32;
1204 if (hw->mac_duplex)
1205 mac |= MAC_CTRL_DUPLX;
1206 else
1207 mac &= ~MAC_CTRL_DUPLX;
1208 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1209 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1210
1211 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1212 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1213 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1214 }
1215
1216 /*
1217 * Reset the transmit and receive units; mask and clear all interrupts.
1218 * hw - Struct containing variables accessed by shared code
1219 * return : 0 or idle status (if error)
1220 */
1221 static int atl1c_reset_mac(struct atl1c_hw *hw)
1222 {
1223 struct atl1c_adapter *adapter = hw->adapter;
1224 struct pci_dev *pdev = adapter->pdev;
1225 u32 ctrl_data = 0;
1226
1227 atl1c_stop_mac(hw);
1228 /*
1229 * Issue Soft Reset to the MAC. This will reset the chip's
1230 * transmit, receive, DMA. It will not effect
1231 * the current PCI configuration. The global reset bit is self-
1232 * clearing, and should clear within a microsecond.
1233 */
1234 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1235 ctrl_data |= MASTER_CTRL_OOB_DIS;
1236 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1237
1238 AT_WRITE_FLUSH(hw);
1239 msleep(10);
1240 /* Wait at least 10ms for All module to be Idle */
1241
1242 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1243 dev_err(&pdev->dev,
1244 "MAC state machine can't be idle since"
1245 " disabled for 10ms second\n");
1246 return -1;
1247 }
1248 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1249
1250 /* driver control speed/duplex */
1251 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1252 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1253
1254 /* clk switch setting */
1255 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1256 switch (hw->nic_type) {
1257 case athr_l2c_b:
1258 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1259 SERDES_MAC_CLK_SLOWDOWN);
1260 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1261 break;
1262 case athr_l2c_b2:
1263 case athr_l1d_2:
1264 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1265 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1266 break;
1267 default:
1268 break;
1269 }
1270
1271 return 0;
1272 }
1273
1274 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1275 {
1276 u16 ctrl_flags = hw->ctrl_flags;
1277
1278 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1279 atl1c_set_aspm(hw, SPEED_0);
1280 hw->ctrl_flags = ctrl_flags;
1281 }
1282
1283 /*
1284 * Set ASPM state.
1285 * Enable/disable L0s/L1 depend on link state.
1286 */
1287 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1288 {
1289 u32 pm_ctrl_data;
1290 u32 link_l1_timer;
1291
1292 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1293 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1294 PM_CTRL_ASPM_L0S_EN |
1295 PM_CTRL_MAC_ASPM_CHK);
1296 /* L1 timer */
1297 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1298 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1299 link_l1_timer =
1300 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1301 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1302 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1303 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1304 } else {
1305 link_l1_timer = hw->nic_type == athr_l2c_b ?
1306 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1307 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1308 link_l1_timer = 1;
1309 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1310 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1311 }
1312
1313 /* L0S/L1 enable */
1314 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1315 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1316 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1317 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1318
1319 /* l2cb & l1d & l2cb2 & l1d2 */
1320 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1321 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1322 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1323 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1324 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1325 PM_CTRL_SERDES_PD_EX_L1 |
1326 PM_CTRL_CLK_SWH_L1;
1327 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1328 PM_CTRL_SERDES_PLL_L1_EN |
1329 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1330 PM_CTRL_SA_DLY_EN |
1331 PM_CTRL_HOTRST);
1332 /* disable l0s if link down or l2cb */
1333 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1334 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1335 } else { /* l1c */
1336 pm_ctrl_data =
1337 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1338 if (link_speed != SPEED_0) {
1339 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1340 PM_CTRL_SERDES_PLL_L1_EN |
1341 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1342 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1343 PM_CTRL_CLK_SWH_L1 |
1344 PM_CTRL_ASPM_L0S_EN |
1345 PM_CTRL_ASPM_L1_EN);
1346 } else { /* link down */
1347 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1348 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1349 PM_CTRL_SERDES_PLL_L1_EN |
1350 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1351 PM_CTRL_ASPM_L0S_EN);
1352 }
1353 }
1354 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1355
1356 return;
1357 }
1358
1359 /**
1360 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1361 * @adapter: board private structure
1362 *
1363 * Configure the Tx /Rx unit of the MAC after a reset.
1364 */
1365 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1366 {
1367 struct atl1c_hw *hw = &adapter->hw;
1368 u32 master_ctrl_data = 0;
1369 u32 intr_modrt_data;
1370 u32 data;
1371
1372 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1373 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1374 MASTER_CTRL_RX_ITIMER_EN |
1375 MASTER_CTRL_INT_RDCLR);
1376 /* clear interrupt status */
1377 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1378 /* Clear any WOL status */
1379 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1380 /* set Interrupt Clear Timer
1381 * HW will enable self to assert interrupt event to system after
1382 * waiting x-time for software to notify it accept interrupt.
1383 */
1384
1385 data = CLK_GATING_EN_ALL;
1386 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1387 if (hw->nic_type == athr_l2c_b)
1388 data &= ~CLK_GATING_RXMAC_EN;
1389 } else
1390 data = 0;
1391 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1392
1393 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1394 hw->ict & INT_RETRIG_TIMER_MASK);
1395
1396 atl1c_configure_des_ring(adapter);
1397
1398 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1399 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1400 IRQ_MODRT_TX_TIMER_SHIFT;
1401 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1402 IRQ_MODRT_RX_TIMER_SHIFT;
1403 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1404 master_ctrl_data |=
1405 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1406 }
1407
1408 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1409 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1410
1411 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1412 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1413
1414 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1415 hw->smb_timer & SMB_STAT_TIMER_MASK);
1416
1417 /* set MTU */
1418 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1419 VLAN_HLEN + ETH_FCS_LEN);
1420
1421 atl1c_configure_tx(adapter);
1422 atl1c_configure_rx(adapter);
1423 atl1c_configure_dma(adapter);
1424
1425 return 0;
1426 }
1427
1428 static int atl1c_configure(struct atl1c_adapter *adapter)
1429 {
1430 struct net_device *netdev = adapter->netdev;
1431 int num;
1432
1433 atl1c_init_ring_ptrs(adapter);
1434 atl1c_set_multi(netdev);
1435 atl1c_restore_vlan(adapter);
1436
1437 num = atl1c_alloc_rx_buffer(adapter);
1438 if (unlikely(num == 0))
1439 return -ENOMEM;
1440
1441 if (atl1c_configure_mac(adapter))
1442 return -EIO;
1443
1444 return 0;
1445 }
1446
1447 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1448 {
1449 u16 hw_reg_addr = 0;
1450 unsigned long *stats_item = NULL;
1451 u32 data;
1452
1453 /* update rx status */
1454 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1455 stats_item = &adapter->hw_stats.rx_ok;
1456 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1457 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1458 *stats_item += data;
1459 stats_item++;
1460 hw_reg_addr += 4;
1461 }
1462 /* update tx status */
1463 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1464 stats_item = &adapter->hw_stats.tx_ok;
1465 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1466 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1467 *stats_item += data;
1468 stats_item++;
1469 hw_reg_addr += 4;
1470 }
1471 }
1472
1473 /**
1474 * atl1c_get_stats - Get System Network Statistics
1475 * @netdev: network interface device structure
1476 *
1477 * Returns the address of the device statistics structure.
1478 * The statistics are actually updated from the timer callback.
1479 */
1480 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1481 {
1482 struct atl1c_adapter *adapter = netdev_priv(netdev);
1483 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1484 struct net_device_stats *net_stats = &netdev->stats;
1485
1486 atl1c_update_hw_stats(adapter);
1487 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1488 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1489 net_stats->multicast = hw_stats->rx_mcast;
1490 net_stats->collisions = hw_stats->tx_1_col +
1491 hw_stats->tx_2_col +
1492 hw_stats->tx_late_col +
1493 hw_stats->tx_abort_col;
1494
1495 net_stats->rx_errors = hw_stats->rx_frag +
1496 hw_stats->rx_fcs_err +
1497 hw_stats->rx_len_err +
1498 hw_stats->rx_sz_ov +
1499 hw_stats->rx_rrd_ov +
1500 hw_stats->rx_align_err +
1501 hw_stats->rx_rxf_ov;
1502
1503 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1504 net_stats->rx_length_errors = hw_stats->rx_len_err;
1505 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1506 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1507 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1508
1509 net_stats->tx_errors = hw_stats->tx_late_col +
1510 hw_stats->tx_abort_col +
1511 hw_stats->tx_underrun +
1512 hw_stats->tx_trunc;
1513
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 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1519 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1520
1521 return net_stats;
1522 }
1523
1524 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1525 {
1526 u16 phy_data;
1527
1528 spin_lock(&adapter->mdio_lock);
1529 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1530 spin_unlock(&adapter->mdio_lock);
1531 }
1532
1533 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1534 enum atl1c_trans_queue type)
1535 {
1536 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1537 struct atl1c_buffer *buffer_info;
1538 struct pci_dev *pdev = adapter->pdev;
1539 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1540 u16 hw_next_to_clean;
1541 u16 reg;
1542 unsigned int total_bytes = 0, total_packets = 0;
1543
1544 reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1545
1546 AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1547
1548 while (next_to_clean != hw_next_to_clean) {
1549 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1550 if (buffer_info->skb) {
1551 total_bytes += buffer_info->skb->len;
1552 total_packets++;
1553 }
1554 atl1c_clean_buffer(pdev, buffer_info);
1555 if (++next_to_clean == tpd_ring->count)
1556 next_to_clean = 0;
1557 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1558 }
1559
1560 netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1561
1562 if (netif_queue_stopped(adapter->netdev) &&
1563 netif_carrier_ok(adapter->netdev)) {
1564 netif_wake_queue(adapter->netdev);
1565 }
1566
1567 return true;
1568 }
1569
1570 /**
1571 * atl1c_intr - Interrupt Handler
1572 * @irq: interrupt number
1573 * @data: pointer to a network interface device structure
1574 */
1575 static irqreturn_t atl1c_intr(int irq, void *data)
1576 {
1577 struct net_device *netdev = data;
1578 struct atl1c_adapter *adapter = netdev_priv(netdev);
1579 struct pci_dev *pdev = adapter->pdev;
1580 struct atl1c_hw *hw = &adapter->hw;
1581 int max_ints = AT_MAX_INT_WORK;
1582 int handled = IRQ_NONE;
1583 u32 status;
1584 u32 reg_data;
1585
1586 do {
1587 AT_READ_REG(hw, REG_ISR, &reg_data);
1588 status = reg_data & hw->intr_mask;
1589
1590 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1591 if (max_ints != AT_MAX_INT_WORK)
1592 handled = IRQ_HANDLED;
1593 break;
1594 }
1595 /* link event */
1596 if (status & ISR_GPHY)
1597 atl1c_clear_phy_int(adapter);
1598 /* Ack ISR */
1599 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1600 if (status & ISR_RX_PKT) {
1601 if (likely(napi_schedule_prep(&adapter->napi))) {
1602 hw->intr_mask &= ~ISR_RX_PKT;
1603 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1604 __napi_schedule(&adapter->napi);
1605 }
1606 }
1607 if (status & ISR_TX_PKT)
1608 atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1609
1610 handled = IRQ_HANDLED;
1611 /* check if PCIE PHY Link down */
1612 if (status & ISR_ERROR) {
1613 if (netif_msg_hw(adapter))
1614 dev_err(&pdev->dev,
1615 "atl1c hardware error (status = 0x%x)\n",
1616 status & ISR_ERROR);
1617 /* reset MAC */
1618 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1619 schedule_work(&adapter->common_task);
1620 return IRQ_HANDLED;
1621 }
1622
1623 if (status & ISR_OVER)
1624 if (netif_msg_intr(adapter))
1625 dev_warn(&pdev->dev,
1626 "TX/RX overflow (status = 0x%x)\n",
1627 status & ISR_OVER);
1628
1629 /* link event */
1630 if (status & (ISR_GPHY | ISR_MANUAL)) {
1631 netdev->stats.tx_carrier_errors++;
1632 atl1c_link_chg_event(adapter);
1633 break;
1634 }
1635
1636 } while (--max_ints > 0);
1637 /* re-enable Interrupt*/
1638 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1639 return handled;
1640 }
1641
1642 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1643 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1644 {
1645 /*
1646 * The pid field in RRS in not correct sometimes, so we
1647 * cannot figure out if the packet is fragmented or not,
1648 * so we tell the KERNEL CHECKSUM_NONE
1649 */
1650 skb_checksum_none_assert(skb);
1651 }
1652
1653 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1654 {
1655 struct sk_buff *skb;
1656 struct page *page;
1657
1658 if (adapter->rx_frag_size > PAGE_SIZE)
1659 return netdev_alloc_skb(adapter->netdev,
1660 adapter->rx_buffer_len);
1661
1662 page = adapter->rx_page;
1663 if (!page) {
1664 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1665 if (unlikely(!page))
1666 return NULL;
1667 adapter->rx_page_offset = 0;
1668 }
1669
1670 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1671 adapter->rx_frag_size);
1672 if (likely(skb)) {
1673 skb_reserve(skb, NET_SKB_PAD);
1674 adapter->rx_page_offset += adapter->rx_frag_size;
1675 if (adapter->rx_page_offset >= PAGE_SIZE)
1676 adapter->rx_page = NULL;
1677 else
1678 get_page(page);
1679 }
1680 return skb;
1681 }
1682
1683 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1684 {
1685 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1686 struct pci_dev *pdev = adapter->pdev;
1687 struct atl1c_buffer *buffer_info, *next_info;
1688 struct sk_buff *skb;
1689 void *vir_addr = NULL;
1690 u16 num_alloc = 0;
1691 u16 rfd_next_to_use, next_next;
1692 struct atl1c_rx_free_desc *rfd_desc;
1693 dma_addr_t mapping;
1694
1695 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1696 if (++next_next == rfd_ring->count)
1697 next_next = 0;
1698 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1699 next_info = &rfd_ring->buffer_info[next_next];
1700
1701 while (next_info->flags & ATL1C_BUFFER_FREE) {
1702 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1703
1704 skb = atl1c_alloc_skb(adapter);
1705 if (unlikely(!skb)) {
1706 if (netif_msg_rx_err(adapter))
1707 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1708 break;
1709 }
1710
1711 /*
1712 * Make buffer alignment 2 beyond a 16 byte boundary
1713 * this will result in a 16 byte aligned IP header after
1714 * the 14 byte MAC header is removed
1715 */
1716 vir_addr = skb->data;
1717 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1718 buffer_info->skb = skb;
1719 buffer_info->length = adapter->rx_buffer_len;
1720 mapping = pci_map_single(pdev, vir_addr,
1721 buffer_info->length,
1722 PCI_DMA_FROMDEVICE);
1723 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1724 dev_kfree_skb(skb);
1725 buffer_info->skb = NULL;
1726 buffer_info->length = 0;
1727 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1728 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1729 break;
1730 }
1731 buffer_info->dma = mapping;
1732 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1733 ATL1C_PCIMAP_FROMDEVICE);
1734 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1735 rfd_next_to_use = next_next;
1736 if (++next_next == rfd_ring->count)
1737 next_next = 0;
1738 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1739 next_info = &rfd_ring->buffer_info[next_next];
1740 num_alloc++;
1741 }
1742
1743 if (num_alloc) {
1744 /* TODO: update mailbox here */
1745 wmb();
1746 rfd_ring->next_to_use = rfd_next_to_use;
1747 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1748 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1749 }
1750
1751 return num_alloc;
1752 }
1753
1754 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1755 struct atl1c_recv_ret_status *rrs, u16 num)
1756 {
1757 u16 i;
1758 /* the relationship between rrd and rfd is one map one */
1759 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1760 rrd_ring->next_to_clean)) {
1761 rrs->word3 &= ~RRS_RXD_UPDATED;
1762 if (++rrd_ring->next_to_clean == rrd_ring->count)
1763 rrd_ring->next_to_clean = 0;
1764 }
1765 }
1766
1767 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1768 struct atl1c_recv_ret_status *rrs, u16 num)
1769 {
1770 u16 i;
1771 u16 rfd_index;
1772 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1773
1774 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1775 RRS_RX_RFD_INDEX_MASK;
1776 for (i = 0; i < num; i++) {
1777 buffer_info[rfd_index].skb = NULL;
1778 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1779 ATL1C_BUFFER_FREE);
1780 if (++rfd_index == rfd_ring->count)
1781 rfd_index = 0;
1782 }
1783 rfd_ring->next_to_clean = rfd_index;
1784 }
1785
1786 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1787 int *work_done, int work_to_do)
1788 {
1789 u16 rfd_num, rfd_index;
1790 u16 count = 0;
1791 u16 length;
1792 struct pci_dev *pdev = adapter->pdev;
1793 struct net_device *netdev = adapter->netdev;
1794 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1795 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1796 struct sk_buff *skb;
1797 struct atl1c_recv_ret_status *rrs;
1798 struct atl1c_buffer *buffer_info;
1799
1800 while (1) {
1801 if (*work_done >= work_to_do)
1802 break;
1803 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1804 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1805 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1806 RRS_RX_RFD_CNT_MASK;
1807 if (unlikely(rfd_num != 1))
1808 /* TODO support mul rfd*/
1809 if (netif_msg_rx_err(adapter))
1810 dev_warn(&pdev->dev,
1811 "Multi rfd not support yet!\n");
1812 goto rrs_checked;
1813 } else {
1814 break;
1815 }
1816 rrs_checked:
1817 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1818 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1819 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1820 if (netif_msg_rx_err(adapter))
1821 dev_warn(&pdev->dev,
1822 "wrong packet! rrs word3 is %x\n",
1823 rrs->word3);
1824 continue;
1825 }
1826
1827 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1828 RRS_PKT_SIZE_MASK);
1829 /* Good Receive */
1830 if (likely(rfd_num == 1)) {
1831 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1832 RRS_RX_RFD_INDEX_MASK;
1833 buffer_info = &rfd_ring->buffer_info[rfd_index];
1834 pci_unmap_single(pdev, buffer_info->dma,
1835 buffer_info->length, PCI_DMA_FROMDEVICE);
1836 skb = buffer_info->skb;
1837 } else {
1838 /* TODO */
1839 if (netif_msg_rx_err(adapter))
1840 dev_warn(&pdev->dev,
1841 "Multi rfd not support yet!\n");
1842 break;
1843 }
1844 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1845 skb_put(skb, length - ETH_FCS_LEN);
1846 skb->protocol = eth_type_trans(skb, netdev);
1847 atl1c_rx_checksum(adapter, skb, rrs);
1848 if (rrs->word3 & RRS_VLAN_INS) {
1849 u16 vlan;
1850
1851 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1852 vlan = le16_to_cpu(vlan);
1853 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1854 }
1855 netif_receive_skb(skb);
1856
1857 (*work_done)++;
1858 count++;
1859 }
1860 if (count)
1861 atl1c_alloc_rx_buffer(adapter);
1862 }
1863
1864 /**
1865 * atl1c_clean - NAPI Rx polling callback
1866 */
1867 static int atl1c_clean(struct napi_struct *napi, int budget)
1868 {
1869 struct atl1c_adapter *adapter =
1870 container_of(napi, struct atl1c_adapter, napi);
1871 int work_done = 0;
1872
1873 /* Keep link state information with original netdev */
1874 if (!netif_carrier_ok(adapter->netdev))
1875 goto quit_polling;
1876 /* just enable one RXQ */
1877 atl1c_clean_rx_irq(adapter, &work_done, budget);
1878
1879 if (work_done < budget) {
1880 quit_polling:
1881 napi_complete_done(napi, work_done);
1882 adapter->hw.intr_mask |= ISR_RX_PKT;
1883 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1884 }
1885 return work_done;
1886 }
1887
1888 #ifdef CONFIG_NET_POLL_CONTROLLER
1889
1890 /*
1891 * Polling 'interrupt' - used by things like netconsole to send skbs
1892 * without having to re-enable interrupts. It's not called while
1893 * the interrupt routine is executing.
1894 */
1895 static void atl1c_netpoll(struct net_device *netdev)
1896 {
1897 struct atl1c_adapter *adapter = netdev_priv(netdev);
1898
1899 disable_irq(adapter->pdev->irq);
1900 atl1c_intr(adapter->pdev->irq, netdev);
1901 enable_irq(adapter->pdev->irq);
1902 }
1903 #endif
1904
1905 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1906 {
1907 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1908 u16 next_to_use = 0;
1909 u16 next_to_clean = 0;
1910
1911 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1912 next_to_use = tpd_ring->next_to_use;
1913
1914 return (u16)(next_to_clean > next_to_use) ?
1915 (next_to_clean - next_to_use - 1) :
1916 (tpd_ring->count + next_to_clean - next_to_use - 1);
1917 }
1918
1919 /*
1920 * get next usable tpd
1921 * Note: should call atl1c_tdp_avail to make sure
1922 * there is enough tpd to use
1923 */
1924 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1925 enum atl1c_trans_queue type)
1926 {
1927 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1928 struct atl1c_tpd_desc *tpd_desc;
1929 u16 next_to_use = 0;
1930
1931 next_to_use = tpd_ring->next_to_use;
1932 if (++tpd_ring->next_to_use == tpd_ring->count)
1933 tpd_ring->next_to_use = 0;
1934 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1935 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1936 return tpd_desc;
1937 }
1938
1939 static struct atl1c_buffer *
1940 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1941 {
1942 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1943
1944 return &tpd_ring->buffer_info[tpd -
1945 (struct atl1c_tpd_desc *)tpd_ring->desc];
1946 }
1947
1948 /* Calculate the transmit packet descript needed*/
1949 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1950 {
1951 u16 tpd_req;
1952 u16 proto_hdr_len = 0;
1953
1954 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1955
1956 if (skb_is_gso(skb)) {
1957 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1958 if (proto_hdr_len < skb_headlen(skb))
1959 tpd_req++;
1960 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1961 tpd_req++;
1962 }
1963 return tpd_req;
1964 }
1965
1966 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1967 struct sk_buff *skb,
1968 struct atl1c_tpd_desc **tpd,
1969 enum atl1c_trans_queue type)
1970 {
1971 struct pci_dev *pdev = adapter->pdev;
1972 unsigned short offload_type;
1973 u8 hdr_len;
1974 u32 real_len;
1975
1976 if (skb_is_gso(skb)) {
1977 int err;
1978
1979 err = skb_cow_head(skb, 0);
1980 if (err < 0)
1981 return err;
1982
1983 offload_type = skb_shinfo(skb)->gso_type;
1984
1985 if (offload_type & SKB_GSO_TCPV4) {
1986 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1987 + ntohs(ip_hdr(skb)->tot_len));
1988
1989 if (real_len < skb->len)
1990 pskb_trim(skb, real_len);
1991
1992 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1993 if (unlikely(skb->len == hdr_len)) {
1994 /* only xsum need */
1995 if (netif_msg_tx_queued(adapter))
1996 dev_warn(&pdev->dev,
1997 "IPV4 tso with zero data??\n");
1998 goto check_sum;
1999 } else {
2000 ip_hdr(skb)->check = 0;
2001 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2002 ip_hdr(skb)->saddr,
2003 ip_hdr(skb)->daddr,
2004 0, IPPROTO_TCP, 0);
2005 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2006 }
2007 }
2008
2009 if (offload_type & SKB_GSO_TCPV6) {
2010 struct atl1c_tpd_ext_desc *etpd =
2011 *(struct atl1c_tpd_ext_desc **)(tpd);
2012
2013 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2014 *tpd = atl1c_get_tpd(adapter, type);
2015 ipv6_hdr(skb)->payload_len = 0;
2016 /* check payload == 0 byte ? */
2017 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2018 if (unlikely(skb->len == hdr_len)) {
2019 /* only xsum need */
2020 if (netif_msg_tx_queued(adapter))
2021 dev_warn(&pdev->dev,
2022 "IPV6 tso with zero data??\n");
2023 goto check_sum;
2024 } else
2025 tcp_v6_gso_csum_prep(skb);
2026
2027 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2028 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2029 etpd->pkt_len = cpu_to_le32(skb->len);
2030 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2031 }
2032
2033 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2034 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2035 TPD_TCPHDR_OFFSET_SHIFT;
2036 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2037 TPD_MSS_SHIFT;
2038 return 0;
2039 }
2040
2041 check_sum:
2042 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2043 u8 css, cso;
2044 cso = skb_checksum_start_offset(skb);
2045
2046 if (unlikely(cso & 0x1)) {
2047 if (netif_msg_tx_err(adapter))
2048 dev_err(&adapter->pdev->dev,
2049 "payload offset should not an event number\n");
2050 return -1;
2051 } else {
2052 css = cso + skb->csum_offset;
2053
2054 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2055 TPD_PLOADOFFSET_SHIFT;
2056 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2057 TPD_CCSUM_OFFSET_SHIFT;
2058 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2059 }
2060 }
2061 return 0;
2062 }
2063
2064 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2065 struct atl1c_tpd_desc *first_tpd,
2066 enum atl1c_trans_queue type)
2067 {
2068 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2069 struct atl1c_buffer *buffer_info;
2070 struct atl1c_tpd_desc *tpd;
2071 u16 first_index, index;
2072
2073 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2074 index = first_index;
2075 while (index != tpd_ring->next_to_use) {
2076 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2077 buffer_info = &tpd_ring->buffer_info[index];
2078 atl1c_clean_buffer(adpt->pdev, buffer_info);
2079 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2080 if (++index == tpd_ring->count)
2081 index = 0;
2082 }
2083 tpd_ring->next_to_use = first_index;
2084 }
2085
2086 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2087 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2088 enum atl1c_trans_queue type)
2089 {
2090 struct atl1c_tpd_desc *use_tpd = NULL;
2091 struct atl1c_buffer *buffer_info = NULL;
2092 u16 buf_len = skb_headlen(skb);
2093 u16 map_len = 0;
2094 u16 mapped_len = 0;
2095 u16 hdr_len = 0;
2096 u16 nr_frags;
2097 u16 f;
2098 int tso;
2099
2100 nr_frags = skb_shinfo(skb)->nr_frags;
2101 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2102 if (tso) {
2103 /* TSO */
2104 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2105 use_tpd = tpd;
2106
2107 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2108 buffer_info->length = map_len;
2109 buffer_info->dma = pci_map_single(adapter->pdev,
2110 skb->data, hdr_len, PCI_DMA_TODEVICE);
2111 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2112 buffer_info->dma)))
2113 goto err_dma;
2114 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2115 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2116 ATL1C_PCIMAP_TODEVICE);
2117 mapped_len += map_len;
2118 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2119 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2120 }
2121
2122 if (mapped_len < buf_len) {
2123 /* mapped_len == 0, means we should use the first tpd,
2124 which is given by caller */
2125 if (mapped_len == 0)
2126 use_tpd = tpd;
2127 else {
2128 use_tpd = atl1c_get_tpd(adapter, type);
2129 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2130 }
2131 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2132 buffer_info->length = buf_len - mapped_len;
2133 buffer_info->dma =
2134 pci_map_single(adapter->pdev, skb->data + mapped_len,
2135 buffer_info->length, PCI_DMA_TODEVICE);
2136 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2137 buffer_info->dma)))
2138 goto err_dma;
2139
2140 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2141 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2142 ATL1C_PCIMAP_TODEVICE);
2143 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2144 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2145 }
2146
2147 for (f = 0; f < nr_frags; f++) {
2148 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2149
2150 use_tpd = atl1c_get_tpd(adapter, type);
2151 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2152
2153 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2154 buffer_info->length = skb_frag_size(frag);
2155 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2156 frag, 0,
2157 buffer_info->length,
2158 DMA_TO_DEVICE);
2159 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2160 goto err_dma;
2161
2162 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2163 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2164 ATL1C_PCIMAP_TODEVICE);
2165 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2166 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2167 }
2168
2169 /* The last tpd */
2170 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2171 /* The last buffer info contain the skb address,
2172 so it will be free after unmap */
2173 buffer_info->skb = skb;
2174
2175 return 0;
2176
2177 err_dma:
2178 buffer_info->dma = 0;
2179 buffer_info->length = 0;
2180 return -1;
2181 }
2182
2183 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2184 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2185 {
2186 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2187 u16 reg;
2188
2189 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2190 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2191 }
2192
2193 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2194 struct net_device *netdev)
2195 {
2196 struct atl1c_adapter *adapter = netdev_priv(netdev);
2197 u16 tpd_req;
2198 struct atl1c_tpd_desc *tpd;
2199 enum atl1c_trans_queue type = atl1c_trans_normal;
2200
2201 if (test_bit(__AT_DOWN, &adapter->flags)) {
2202 dev_kfree_skb_any(skb);
2203 return NETDEV_TX_OK;
2204 }
2205
2206 tpd_req = atl1c_cal_tpd_req(skb);
2207
2208 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2209 /* no enough descriptor, just stop queue */
2210 netif_stop_queue(netdev);
2211 return NETDEV_TX_BUSY;
2212 }
2213
2214 tpd = atl1c_get_tpd(adapter, type);
2215
2216 /* do TSO and check sum */
2217 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2218 dev_kfree_skb_any(skb);
2219 return NETDEV_TX_OK;
2220 }
2221
2222 if (unlikely(skb_vlan_tag_present(skb))) {
2223 u16 vlan = skb_vlan_tag_get(skb);
2224 __le16 tag;
2225
2226 vlan = cpu_to_le16(vlan);
2227 AT_VLAN_TO_TAG(vlan, tag);
2228 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2229 tpd->vlan_tag = tag;
2230 }
2231
2232 if (skb_network_offset(skb) != ETH_HLEN)
2233 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2234
2235 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2236 netif_info(adapter, tx_done, adapter->netdev,
2237 "tx-skb dropped due to dma error\n");
2238 /* roll back tpd/buffer */
2239 atl1c_tx_rollback(adapter, tpd, type);
2240 dev_kfree_skb_any(skb);
2241 } else {
2242 netdev_sent_queue(adapter->netdev, skb->len);
2243 atl1c_tx_queue(adapter, skb, tpd, type);
2244 }
2245
2246 return NETDEV_TX_OK;
2247 }
2248
2249 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2250 {
2251 struct net_device *netdev = adapter->netdev;
2252
2253 free_irq(adapter->pdev->irq, netdev);
2254
2255 if (adapter->have_msi)
2256 pci_disable_msi(adapter->pdev);
2257 }
2258
2259 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2260 {
2261 struct pci_dev *pdev = adapter->pdev;
2262 struct net_device *netdev = adapter->netdev;
2263 int flags = 0;
2264 int err = 0;
2265
2266 adapter->have_msi = true;
2267 err = pci_enable_msi(adapter->pdev);
2268 if (err) {
2269 if (netif_msg_ifup(adapter))
2270 dev_err(&pdev->dev,
2271 "Unable to allocate MSI interrupt Error: %d\n",
2272 err);
2273 adapter->have_msi = false;
2274 }
2275
2276 if (!adapter->have_msi)
2277 flags |= IRQF_SHARED;
2278 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2279 netdev->name, netdev);
2280 if (err) {
2281 if (netif_msg_ifup(adapter))
2282 dev_err(&pdev->dev,
2283 "Unable to allocate interrupt Error: %d\n",
2284 err);
2285 if (adapter->have_msi)
2286 pci_disable_msi(adapter->pdev);
2287 return err;
2288 }
2289 if (netif_msg_ifup(adapter))
2290 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2291 return err;
2292 }
2293
2294
2295 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2296 {
2297 /* release tx-pending skbs and reset tx/rx ring index */
2298 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2299 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2300 atl1c_clean_rx_ring(adapter);
2301 }
2302
2303 static int atl1c_up(struct atl1c_adapter *adapter)
2304 {
2305 struct net_device *netdev = adapter->netdev;
2306 int err;
2307
2308 netif_carrier_off(netdev);
2309
2310 err = atl1c_configure(adapter);
2311 if (unlikely(err))
2312 goto err_up;
2313
2314 err = atl1c_request_irq(adapter);
2315 if (unlikely(err))
2316 goto err_up;
2317
2318 atl1c_check_link_status(adapter);
2319 clear_bit(__AT_DOWN, &adapter->flags);
2320 napi_enable(&adapter->napi);
2321 atl1c_irq_enable(adapter);
2322 netif_start_queue(netdev);
2323 return err;
2324
2325 err_up:
2326 atl1c_clean_rx_ring(adapter);
2327 return err;
2328 }
2329
2330 static void atl1c_down(struct atl1c_adapter *adapter)
2331 {
2332 struct net_device *netdev = adapter->netdev;
2333
2334 atl1c_del_timer(adapter);
2335 adapter->work_event = 0; /* clear all event */
2336 /* signal that we're down so the interrupt handler does not
2337 * reschedule our watchdog timer */
2338 set_bit(__AT_DOWN, &adapter->flags);
2339 netif_carrier_off(netdev);
2340 napi_disable(&adapter->napi);
2341 atl1c_irq_disable(adapter);
2342 atl1c_free_irq(adapter);
2343 /* disable ASPM if device inactive */
2344 atl1c_disable_l0s_l1(&adapter->hw);
2345 /* reset MAC to disable all RX/TX */
2346 atl1c_reset_mac(&adapter->hw);
2347 msleep(1);
2348
2349 adapter->link_speed = SPEED_0;
2350 adapter->link_duplex = -1;
2351 atl1c_reset_dma_ring(adapter);
2352 }
2353
2354 /**
2355 * atl1c_open - Called when a network interface is made active
2356 * @netdev: network interface device structure
2357 *
2358 * Returns 0 on success, negative value on failure
2359 *
2360 * The open entry point is called when a network interface is made
2361 * active by the system (IFF_UP). At this point all resources needed
2362 * for transmit and receive operations are allocated, the interrupt
2363 * handler is registered with the OS, the watchdog timer is started,
2364 * and the stack is notified that the interface is ready.
2365 */
2366 static int atl1c_open(struct net_device *netdev)
2367 {
2368 struct atl1c_adapter *adapter = netdev_priv(netdev);
2369 int err;
2370
2371 /* disallow open during test */
2372 if (test_bit(__AT_TESTING, &adapter->flags))
2373 return -EBUSY;
2374
2375 /* allocate rx/tx dma buffer & descriptors */
2376 err = atl1c_setup_ring_resources(adapter);
2377 if (unlikely(err))
2378 return err;
2379
2380 err = atl1c_up(adapter);
2381 if (unlikely(err))
2382 goto err_up;
2383
2384 return 0;
2385
2386 err_up:
2387 atl1c_free_irq(adapter);
2388 atl1c_free_ring_resources(adapter);
2389 atl1c_reset_mac(&adapter->hw);
2390 return err;
2391 }
2392
2393 /**
2394 * atl1c_close - Disables a network interface
2395 * @netdev: network interface device structure
2396 *
2397 * Returns 0, this is not allowed to fail
2398 *
2399 * The close entry point is called when an interface is de-activated
2400 * by the OS. The hardware is still under the drivers control, but
2401 * needs to be disabled. A global MAC reset is issued to stop the
2402 * hardware, and all transmit and receive resources are freed.
2403 */
2404 static int atl1c_close(struct net_device *netdev)
2405 {
2406 struct atl1c_adapter *adapter = netdev_priv(netdev);
2407
2408 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2409 set_bit(__AT_DOWN, &adapter->flags);
2410 cancel_work_sync(&adapter->common_task);
2411 atl1c_down(adapter);
2412 atl1c_free_ring_resources(adapter);
2413 return 0;
2414 }
2415
2416 static int atl1c_suspend(struct device *dev)
2417 {
2418 struct net_device *netdev = dev_get_drvdata(dev);
2419 struct atl1c_adapter *adapter = netdev_priv(netdev);
2420 struct atl1c_hw *hw = &adapter->hw;
2421 u32 wufc = adapter->wol;
2422
2423 atl1c_disable_l0s_l1(hw);
2424 if (netif_running(netdev)) {
2425 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2426 atl1c_down(adapter);
2427 }
2428 netif_device_detach(netdev);
2429
2430 if (wufc)
2431 if (atl1c_phy_to_ps_link(hw) != 0)
2432 dev_dbg(dev, "phy power saving failed");
2433
2434 atl1c_power_saving(hw, wufc);
2435
2436 return 0;
2437 }
2438
2439 #ifdef CONFIG_PM_SLEEP
2440 static int atl1c_resume(struct device *dev)
2441 {
2442 struct net_device *netdev = dev_get_drvdata(dev);
2443 struct atl1c_adapter *adapter = netdev_priv(netdev);
2444
2445 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2446 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2447
2448 atl1c_phy_reset(&adapter->hw);
2449 atl1c_reset_mac(&adapter->hw);
2450 atl1c_phy_init(&adapter->hw);
2451
2452 #if 0
2453 AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2454 pm_data &= ~PM_CTRLSTAT_PME_EN;
2455 AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2456 #endif
2457
2458 netif_device_attach(netdev);
2459 if (netif_running(netdev))
2460 atl1c_up(adapter);
2461
2462 return 0;
2463 }
2464 #endif
2465
2466 static void atl1c_shutdown(struct pci_dev *pdev)
2467 {
2468 struct net_device *netdev = pci_get_drvdata(pdev);
2469 struct atl1c_adapter *adapter = netdev_priv(netdev);
2470
2471 atl1c_suspend(&pdev->dev);
2472 pci_wake_from_d3(pdev, adapter->wol);
2473 pci_set_power_state(pdev, PCI_D3hot);
2474 }
2475
2476 static const struct net_device_ops atl1c_netdev_ops = {
2477 .ndo_open = atl1c_open,
2478 .ndo_stop = atl1c_close,
2479 .ndo_validate_addr = eth_validate_addr,
2480 .ndo_start_xmit = atl1c_xmit_frame,
2481 .ndo_set_mac_address = atl1c_set_mac_addr,
2482 .ndo_set_rx_mode = atl1c_set_multi,
2483 .ndo_change_mtu = atl1c_change_mtu,
2484 .ndo_fix_features = atl1c_fix_features,
2485 .ndo_set_features = atl1c_set_features,
2486 .ndo_do_ioctl = atl1c_ioctl,
2487 .ndo_tx_timeout = atl1c_tx_timeout,
2488 .ndo_get_stats = atl1c_get_stats,
2489 #ifdef CONFIG_NET_POLL_CONTROLLER
2490 .ndo_poll_controller = atl1c_netpoll,
2491 #endif
2492 };
2493
2494 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2495 {
2496 SET_NETDEV_DEV(netdev, &pdev->dev);
2497 pci_set_drvdata(pdev, netdev);
2498
2499 netdev->netdev_ops = &atl1c_netdev_ops;
2500 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2501 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2502 atl1c_set_ethtool_ops(netdev);
2503
2504 /* TODO: add when ready */
2505 netdev->hw_features = NETIF_F_SG |
2506 NETIF_F_HW_CSUM |
2507 NETIF_F_HW_VLAN_CTAG_RX |
2508 NETIF_F_TSO |
2509 NETIF_F_TSO6;
2510 netdev->features = netdev->hw_features |
2511 NETIF_F_HW_VLAN_CTAG_TX;
2512 return 0;
2513 }
2514
2515 /**
2516 * atl1c_probe - Device Initialization Routine
2517 * @pdev: PCI device information struct
2518 * @ent: entry in atl1c_pci_tbl
2519 *
2520 * Returns 0 on success, negative on failure
2521 *
2522 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2523 * The OS initialization, configuring of the adapter private structure,
2524 * and a hardware reset occur.
2525 */
2526 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2527 {
2528 struct net_device *netdev;
2529 struct atl1c_adapter *adapter;
2530 static int cards_found;
2531
2532 int err = 0;
2533
2534 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2535 err = pci_enable_device_mem(pdev);
2536 if (err) {
2537 dev_err(&pdev->dev, "cannot enable PCI device\n");
2538 return err;
2539 }
2540
2541 /*
2542 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2543 * shared register for the high 32 bits, so only a single, aligned,
2544 * 4 GB physical address range can be used at a time.
2545 *
2546 * Supporting 64-bit DMA on this hardware is more trouble than it's
2547 * worth. It is far easier to limit to 32-bit DMA than update
2548 * various kernel subsystems to support the mechanics required by a
2549 * fixed-high-32-bit system.
2550 */
2551 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2552 (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2553 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2554 goto err_dma;
2555 }
2556
2557 err = pci_request_regions(pdev, atl1c_driver_name);
2558 if (err) {
2559 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2560 goto err_pci_reg;
2561 }
2562
2563 pci_set_master(pdev);
2564
2565 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2566 if (netdev == NULL) {
2567 err = -ENOMEM;
2568 goto err_alloc_etherdev;
2569 }
2570
2571 err = atl1c_init_netdev(netdev, pdev);
2572 if (err) {
2573 dev_err(&pdev->dev, "init netdevice failed\n");
2574 goto err_init_netdev;
2575 }
2576 adapter = netdev_priv(netdev);
2577 adapter->bd_number = cards_found;
2578 adapter->netdev = netdev;
2579 adapter->pdev = pdev;
2580 adapter->hw.adapter = adapter;
2581 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2582 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2583 if (!adapter->hw.hw_addr) {
2584 err = -EIO;
2585 dev_err(&pdev->dev, "cannot map device registers\n");
2586 goto err_ioremap;
2587 }
2588
2589 /* init mii data */
2590 adapter->mii.dev = netdev;
2591 adapter->mii.mdio_read = atl1c_mdio_read;
2592 adapter->mii.mdio_write = atl1c_mdio_write;
2593 adapter->mii.phy_id_mask = 0x1f;
2594 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2595 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2596 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2597 /* setup the private structure */
2598 err = atl1c_sw_init(adapter);
2599 if (err) {
2600 dev_err(&pdev->dev, "net device private data init failed\n");
2601 goto err_sw_init;
2602 }
2603 /* set max MTU */
2604 atl1c_set_max_mtu(netdev);
2605
2606 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2607
2608 /* Init GPHY as early as possible due to power saving issue */
2609 atl1c_phy_reset(&adapter->hw);
2610
2611 err = atl1c_reset_mac(&adapter->hw);
2612 if (err) {
2613 err = -EIO;
2614 goto err_reset;
2615 }
2616
2617 /* reset the controller to
2618 * put the device in a known good starting state */
2619 err = atl1c_phy_init(&adapter->hw);
2620 if (err) {
2621 err = -EIO;
2622 goto err_reset;
2623 }
2624 if (atl1c_read_mac_addr(&adapter->hw)) {
2625 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2626 netdev->addr_assign_type = NET_ADDR_RANDOM;
2627 }
2628 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2629 if (netif_msg_probe(adapter))
2630 dev_dbg(&pdev->dev, "mac address : %pM\n",
2631 adapter->hw.mac_addr);
2632
2633 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2634 INIT_WORK(&adapter->common_task, atl1c_common_task);
2635 adapter->work_event = 0;
2636 err = register_netdev(netdev);
2637 if (err) {
2638 dev_err(&pdev->dev, "register netdevice failed\n");
2639 goto err_register;
2640 }
2641
2642 cards_found++;
2643 return 0;
2644
2645 err_reset:
2646 err_register:
2647 err_sw_init:
2648 iounmap(adapter->hw.hw_addr);
2649 err_init_netdev:
2650 err_ioremap:
2651 free_netdev(netdev);
2652 err_alloc_etherdev:
2653 pci_release_regions(pdev);
2654 err_pci_reg:
2655 err_dma:
2656 pci_disable_device(pdev);
2657 return err;
2658 }
2659
2660 /**
2661 * atl1c_remove - Device Removal Routine
2662 * @pdev: PCI device information struct
2663 *
2664 * atl1c_remove is called by the PCI subsystem to alert the driver
2665 * that it should release a PCI device. The could be caused by a
2666 * Hot-Plug event, or because the driver is going to be removed from
2667 * memory.
2668 */
2669 static void atl1c_remove(struct pci_dev *pdev)
2670 {
2671 struct net_device *netdev = pci_get_drvdata(pdev);
2672 struct atl1c_adapter *adapter = netdev_priv(netdev);
2673
2674 unregister_netdev(netdev);
2675 /* restore permanent address */
2676 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2677 atl1c_phy_disable(&adapter->hw);
2678
2679 iounmap(adapter->hw.hw_addr);
2680
2681 pci_release_regions(pdev);
2682 pci_disable_device(pdev);
2683 free_netdev(netdev);
2684 }
2685
2686 /**
2687 * atl1c_io_error_detected - called when PCI error is detected
2688 * @pdev: Pointer to PCI device
2689 * @state: The current pci connection state
2690 *
2691 * This function is called after a PCI bus error affecting
2692 * this device has been detected.
2693 */
2694 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2695 pci_channel_state_t state)
2696 {
2697 struct net_device *netdev = pci_get_drvdata(pdev);
2698 struct atl1c_adapter *adapter = netdev_priv(netdev);
2699
2700 netif_device_detach(netdev);
2701
2702 if (state == pci_channel_io_perm_failure)
2703 return PCI_ERS_RESULT_DISCONNECT;
2704
2705 if (netif_running(netdev))
2706 atl1c_down(adapter);
2707
2708 pci_disable_device(pdev);
2709
2710 /* Request a slot slot reset. */
2711 return PCI_ERS_RESULT_NEED_RESET;
2712 }
2713
2714 /**
2715 * atl1c_io_slot_reset - called after the pci bus has been reset.
2716 * @pdev: Pointer to PCI device
2717 *
2718 * Restart the card from scratch, as if from a cold-boot. Implementation
2719 * resembles the first-half of the e1000_resume routine.
2720 */
2721 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2722 {
2723 struct net_device *netdev = pci_get_drvdata(pdev);
2724 struct atl1c_adapter *adapter = netdev_priv(netdev);
2725
2726 if (pci_enable_device(pdev)) {
2727 if (netif_msg_hw(adapter))
2728 dev_err(&pdev->dev,
2729 "Cannot re-enable PCI device after reset\n");
2730 return PCI_ERS_RESULT_DISCONNECT;
2731 }
2732 pci_set_master(pdev);
2733
2734 pci_enable_wake(pdev, PCI_D3hot, 0);
2735 pci_enable_wake(pdev, PCI_D3cold, 0);
2736
2737 atl1c_reset_mac(&adapter->hw);
2738
2739 return PCI_ERS_RESULT_RECOVERED;
2740 }
2741
2742 /**
2743 * atl1c_io_resume - called when traffic can start flowing again.
2744 * @pdev: Pointer to PCI device
2745 *
2746 * This callback is called when the error recovery driver tells us that
2747 * its OK to resume normal operation. Implementation resembles the
2748 * second-half of the atl1c_resume routine.
2749 */
2750 static void atl1c_io_resume(struct pci_dev *pdev)
2751 {
2752 struct net_device *netdev = pci_get_drvdata(pdev);
2753 struct atl1c_adapter *adapter = netdev_priv(netdev);
2754
2755 if (netif_running(netdev)) {
2756 if (atl1c_up(adapter)) {
2757 if (netif_msg_hw(adapter))
2758 dev_err(&pdev->dev,
2759 "Cannot bring device back up after reset\n");
2760 return;
2761 }
2762 }
2763
2764 netif_device_attach(netdev);
2765 }
2766
2767 static const struct pci_error_handlers atl1c_err_handler = {
2768 .error_detected = atl1c_io_error_detected,
2769 .slot_reset = atl1c_io_slot_reset,
2770 .resume = atl1c_io_resume,
2771 };
2772
2773 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2774
2775 static struct pci_driver atl1c_driver = {
2776 .name = atl1c_driver_name,
2777 .id_table = atl1c_pci_tbl,
2778 .probe = atl1c_probe,
2779 .remove = atl1c_remove,
2780 .shutdown = atl1c_shutdown,
2781 .err_handler = &atl1c_err_handler,
2782 .driver.pm = &atl1c_pm_ops,
2783 };
2784
2785 module_pci_driver(atl1c_driver);
Linux with added FPC-III support