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UBUNTU: Ubuntu-5.11.0-22.23
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / ethernet / atheros / atl1c / atl1c_main.c
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 * @t: timer list containing 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 atl1c_down(adapter);
224 atl1c_up(adapter);
225 clear_bit(__AT_RESETTING, &adapter->flags);
226 }
227
228 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
229 {
230 struct atl1c_hw *hw = &adapter->hw;
231 struct net_device *netdev = adapter->netdev;
232 struct pci_dev *pdev = adapter->pdev;
233 int err;
234 unsigned long flags;
235 u16 speed, duplex, phy_data;
236
237 spin_lock_irqsave(&adapter->mdio_lock, flags);
238 /* MII_BMSR must read twise */
239 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
240 atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
241 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
242
243 if ((phy_data & BMSR_LSTATUS) == 0) {
244 /* link down */
245 netif_carrier_off(netdev);
246 hw->hibernate = true;
247 if (atl1c_reset_mac(hw) != 0)
248 if (netif_msg_hw(adapter))
249 dev_warn(&pdev->dev, "reset mac failed\n");
250 atl1c_set_aspm(hw, SPEED_0);
251 atl1c_post_phy_linkchg(hw, SPEED_0);
252 atl1c_reset_dma_ring(adapter);
253 atl1c_configure(adapter);
254 } else {
255 /* Link Up */
256 hw->hibernate = false;
257 spin_lock_irqsave(&adapter->mdio_lock, flags);
258 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
259 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
260 if (unlikely(err))
261 return;
262 /* link result is our setting */
263 if (adapter->link_speed != speed ||
264 adapter->link_duplex != duplex) {
265 adapter->link_speed = speed;
266 adapter->link_duplex = duplex;
267 atl1c_set_aspm(hw, speed);
268 atl1c_post_phy_linkchg(hw, speed);
269 atl1c_start_mac(adapter);
270 if (netif_msg_link(adapter))
271 dev_info(&pdev->dev,
272 "%s: %s NIC Link is Up<%d Mbps %s>\n",
273 atl1c_driver_name, netdev->name,
274 adapter->link_speed,
275 adapter->link_duplex == FULL_DUPLEX ?
276 "Full Duplex" : "Half Duplex");
277 }
278 if (!netif_carrier_ok(netdev))
279 netif_carrier_on(netdev);
280 }
281 }
282
283 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
284 {
285 struct net_device *netdev = adapter->netdev;
286 struct pci_dev *pdev = adapter->pdev;
287 u16 phy_data;
288 u16 link_up;
289
290 spin_lock(&adapter->mdio_lock);
291 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
292 atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
293 spin_unlock(&adapter->mdio_lock);
294 link_up = phy_data & BMSR_LSTATUS;
295 /* notify upper layer link down ASAP */
296 if (!link_up) {
297 if (netif_carrier_ok(netdev)) {
298 /* old link state: Up */
299 netif_carrier_off(netdev);
300 if (netif_msg_link(adapter))
301 dev_info(&pdev->dev,
302 "%s: %s NIC Link is Down\n",
303 atl1c_driver_name, netdev->name);
304 adapter->link_speed = SPEED_0;
305 }
306 }
307
308 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
309 schedule_work(&adapter->common_task);
310 }
311
312 static void atl1c_common_task(struct work_struct *work)
313 {
314 struct atl1c_adapter *adapter;
315 struct net_device *netdev;
316
317 adapter = container_of(work, struct atl1c_adapter, common_task);
318 netdev = adapter->netdev;
319
320 if (test_bit(__AT_DOWN, &adapter->flags))
321 return;
322
323 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
324 netif_device_detach(netdev);
325 atl1c_down(adapter);
326 atl1c_up(adapter);
327 netif_device_attach(netdev);
328 }
329
330 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
331 &adapter->work_event)) {
332 atl1c_irq_disable(adapter);
333 atl1c_check_link_status(adapter);
334 atl1c_irq_enable(adapter);
335 }
336 }
337
338
339 static void atl1c_del_timer(struct atl1c_adapter *adapter)
340 {
341 del_timer_sync(&adapter->phy_config_timer);
342 }
343
344
345 /**
346 * atl1c_tx_timeout - Respond to a Tx Hang
347 * @netdev: network interface device structure
348 * @txqueue: index of hanging tx queue
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 = DMA_FROM_DEVICE;
830 else
831 pci_driection = DMA_TO_DEVICE;
832
833 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
834 dma_unmap_single(&pdev->dev, buffer_info->dma,
835 buffer_info->length, pci_driection);
836 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
837 dma_unmap_page(&pdev->dev, 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 * @type: type of transmit queue
850 */
851 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
852 enum atl1c_trans_queue type)
853 {
854 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
855 struct atl1c_buffer *buffer_info;
856 struct pci_dev *pdev = adapter->pdev;
857 u16 index, ring_count;
858
859 ring_count = tpd_ring->count;
860 for (index = 0; index < ring_count; index++) {
861 buffer_info = &tpd_ring->buffer_info[index];
862 atl1c_clean_buffer(pdev, buffer_info);
863 }
864
865 netdev_reset_queue(adapter->netdev);
866
867 /* Zero out Tx-buffers */
868 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
869 ring_count);
870 atomic_set(&tpd_ring->next_to_clean, 0);
871 tpd_ring->next_to_use = 0;
872 }
873
874 /**
875 * atl1c_clean_rx_ring - Free rx-reservation skbs
876 * @adapter: board private structure
877 */
878 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
879 {
880 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
881 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
882 struct atl1c_buffer *buffer_info;
883 struct pci_dev *pdev = adapter->pdev;
884 int j;
885
886 for (j = 0; j < rfd_ring->count; j++) {
887 buffer_info = &rfd_ring->buffer_info[j];
888 atl1c_clean_buffer(pdev, buffer_info);
889 }
890 /* zero out the descriptor ring */
891 memset(rfd_ring->desc, 0, rfd_ring->size);
892 rfd_ring->next_to_clean = 0;
893 rfd_ring->next_to_use = 0;
894 rrd_ring->next_to_use = 0;
895 rrd_ring->next_to_clean = 0;
896 }
897
898 /*
899 * Read / Write Ptr Initialize:
900 */
901 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
902 {
903 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
904 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
905 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
906 struct atl1c_buffer *buffer_info;
907 int i, j;
908
909 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
910 tpd_ring[i].next_to_use = 0;
911 atomic_set(&tpd_ring[i].next_to_clean, 0);
912 buffer_info = tpd_ring[i].buffer_info;
913 for (j = 0; j < tpd_ring->count; j++)
914 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
915 ATL1C_BUFFER_FREE);
916 }
917 rfd_ring->next_to_use = 0;
918 rfd_ring->next_to_clean = 0;
919 rrd_ring->next_to_use = 0;
920 rrd_ring->next_to_clean = 0;
921 for (j = 0; j < rfd_ring->count; j++) {
922 buffer_info = &rfd_ring->buffer_info[j];
923 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
924 }
925 }
926
927 /**
928 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
929 * @adapter: board private structure
930 *
931 * Free all transmit software resources
932 */
933 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
934 {
935 struct pci_dev *pdev = adapter->pdev;
936
937 dma_free_coherent(&pdev->dev, adapter->ring_header.size,
938 adapter->ring_header.desc, 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;
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 = dma_map_single(&pdev->dev, vir_addr,
1721 buffer_info->length, DMA_FROM_DEVICE);
1722 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1723 dev_kfree_skb(skb);
1724 buffer_info->skb = NULL;
1725 buffer_info->length = 0;
1726 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1727 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1728 break;
1729 }
1730 buffer_info->dma = mapping;
1731 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1732 ATL1C_PCIMAP_FROMDEVICE);
1733 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1734 rfd_next_to_use = next_next;
1735 if (++next_next == rfd_ring->count)
1736 next_next = 0;
1737 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1738 next_info = &rfd_ring->buffer_info[next_next];
1739 num_alloc++;
1740 }
1741
1742 if (num_alloc) {
1743 /* TODO: update mailbox here */
1744 wmb();
1745 rfd_ring->next_to_use = rfd_next_to_use;
1746 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1747 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1748 }
1749
1750 return num_alloc;
1751 }
1752
1753 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1754 struct atl1c_recv_ret_status *rrs, u16 num)
1755 {
1756 u16 i;
1757 /* the relationship between rrd and rfd is one map one */
1758 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1759 rrd_ring->next_to_clean)) {
1760 rrs->word3 &= ~RRS_RXD_UPDATED;
1761 if (++rrd_ring->next_to_clean == rrd_ring->count)
1762 rrd_ring->next_to_clean = 0;
1763 }
1764 }
1765
1766 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1767 struct atl1c_recv_ret_status *rrs, u16 num)
1768 {
1769 u16 i;
1770 u16 rfd_index;
1771 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1772
1773 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1774 RRS_RX_RFD_INDEX_MASK;
1775 for (i = 0; i < num; i++) {
1776 buffer_info[rfd_index].skb = NULL;
1777 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1778 ATL1C_BUFFER_FREE);
1779 if (++rfd_index == rfd_ring->count)
1780 rfd_index = 0;
1781 }
1782 rfd_ring->next_to_clean = rfd_index;
1783 }
1784
1785 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1786 int *work_done, int work_to_do)
1787 {
1788 u16 rfd_num, rfd_index;
1789 u16 count = 0;
1790 u16 length;
1791 struct pci_dev *pdev = adapter->pdev;
1792 struct net_device *netdev = adapter->netdev;
1793 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1794 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1795 struct sk_buff *skb;
1796 struct atl1c_recv_ret_status *rrs;
1797 struct atl1c_buffer *buffer_info;
1798
1799 while (1) {
1800 if (*work_done >= work_to_do)
1801 break;
1802 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1803 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1804 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1805 RRS_RX_RFD_CNT_MASK;
1806 if (unlikely(rfd_num != 1))
1807 /* TODO support mul rfd*/
1808 if (netif_msg_rx_err(adapter))
1809 dev_warn(&pdev->dev,
1810 "Multi rfd not support yet!\n");
1811 goto rrs_checked;
1812 } else {
1813 break;
1814 }
1815 rrs_checked:
1816 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1817 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1818 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1819 if (netif_msg_rx_err(adapter))
1820 dev_warn(&pdev->dev,
1821 "wrong packet! rrs word3 is %x\n",
1822 rrs->word3);
1823 continue;
1824 }
1825
1826 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1827 RRS_PKT_SIZE_MASK);
1828 /* Good Receive */
1829 if (likely(rfd_num == 1)) {
1830 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1831 RRS_RX_RFD_INDEX_MASK;
1832 buffer_info = &rfd_ring->buffer_info[rfd_index];
1833 dma_unmap_single(&pdev->dev, buffer_info->dma,
1834 buffer_info->length, DMA_FROM_DEVICE);
1835 skb = buffer_info->skb;
1836 } else {
1837 /* TODO */
1838 if (netif_msg_rx_err(adapter))
1839 dev_warn(&pdev->dev,
1840 "Multi rfd not support yet!\n");
1841 break;
1842 }
1843 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1844 skb_put(skb, length - ETH_FCS_LEN);
1845 skb->protocol = eth_type_trans(skb, netdev);
1846 atl1c_rx_checksum(adapter, skb, rrs);
1847 if (rrs->word3 & RRS_VLAN_INS) {
1848 u16 vlan;
1849
1850 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1851 vlan = le16_to_cpu(vlan);
1852 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1853 }
1854 netif_receive_skb(skb);
1855
1856 (*work_done)++;
1857 count++;
1858 }
1859 if (count)
1860 atl1c_alloc_rx_buffer(adapter);
1861 }
1862
1863 /**
1864 * atl1c_clean - NAPI Rx polling callback
1865 * @napi: napi info
1866 * @budget: limit of packets to clean
1867 */
1868 static int atl1c_clean(struct napi_struct *napi, int budget)
1869 {
1870 struct atl1c_adapter *adapter =
1871 container_of(napi, struct atl1c_adapter, napi);
1872 int work_done = 0;
1873
1874 /* Keep link state information with original netdev */
1875 if (!netif_carrier_ok(adapter->netdev))
1876 goto quit_polling;
1877 /* just enable one RXQ */
1878 atl1c_clean_rx_irq(adapter, &work_done, budget);
1879
1880 if (work_done < budget) {
1881 quit_polling:
1882 napi_complete_done(napi, work_done);
1883 adapter->hw.intr_mask |= ISR_RX_PKT;
1884 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1885 }
1886 return work_done;
1887 }
1888
1889 #ifdef CONFIG_NET_POLL_CONTROLLER
1890
1891 /*
1892 * Polling 'interrupt' - used by things like netconsole to send skbs
1893 * without having to re-enable interrupts. It's not called while
1894 * the interrupt routine is executing.
1895 */
1896 static void atl1c_netpoll(struct net_device *netdev)
1897 {
1898 struct atl1c_adapter *adapter = netdev_priv(netdev);
1899
1900 disable_irq(adapter->pdev->irq);
1901 atl1c_intr(adapter->pdev->irq, netdev);
1902 enable_irq(adapter->pdev->irq);
1903 }
1904 #endif
1905
1906 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1907 {
1908 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1909 u16 next_to_use = 0;
1910 u16 next_to_clean = 0;
1911
1912 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1913 next_to_use = tpd_ring->next_to_use;
1914
1915 return (u16)(next_to_clean > next_to_use) ?
1916 (next_to_clean - next_to_use - 1) :
1917 (tpd_ring->count + next_to_clean - next_to_use - 1);
1918 }
1919
1920 /*
1921 * get next usable tpd
1922 * Note: should call atl1c_tdp_avail to make sure
1923 * there is enough tpd to use
1924 */
1925 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1926 enum atl1c_trans_queue type)
1927 {
1928 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1929 struct atl1c_tpd_desc *tpd_desc;
1930 u16 next_to_use = 0;
1931
1932 next_to_use = tpd_ring->next_to_use;
1933 if (++tpd_ring->next_to_use == tpd_ring->count)
1934 tpd_ring->next_to_use = 0;
1935 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1936 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1937 return tpd_desc;
1938 }
1939
1940 static struct atl1c_buffer *
1941 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1942 {
1943 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1944
1945 return &tpd_ring->buffer_info[tpd -
1946 (struct atl1c_tpd_desc *)tpd_ring->desc];
1947 }
1948
1949 /* Calculate the transmit packet descript needed*/
1950 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1951 {
1952 u16 tpd_req;
1953 u16 proto_hdr_len = 0;
1954
1955 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1956
1957 if (skb_is_gso(skb)) {
1958 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1959 if (proto_hdr_len < skb_headlen(skb))
1960 tpd_req++;
1961 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1962 tpd_req++;
1963 }
1964 return tpd_req;
1965 }
1966
1967 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1968 struct sk_buff *skb,
1969 struct atl1c_tpd_desc **tpd,
1970 enum atl1c_trans_queue type)
1971 {
1972 struct pci_dev *pdev = adapter->pdev;
1973 unsigned short offload_type;
1974 u8 hdr_len;
1975 u32 real_len;
1976
1977 if (skb_is_gso(skb)) {
1978 int err;
1979
1980 err = skb_cow_head(skb, 0);
1981 if (err < 0)
1982 return err;
1983
1984 offload_type = skb_shinfo(skb)->gso_type;
1985
1986 if (offload_type & SKB_GSO_TCPV4) {
1987 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1988 + ntohs(ip_hdr(skb)->tot_len));
1989
1990 if (real_len < skb->len)
1991 pskb_trim(skb, real_len);
1992
1993 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1994 if (unlikely(skb->len == hdr_len)) {
1995 /* only xsum need */
1996 if (netif_msg_tx_queued(adapter))
1997 dev_warn(&pdev->dev,
1998 "IPV4 tso with zero data??\n");
1999 goto check_sum;
2000 } else {
2001 ip_hdr(skb)->check = 0;
2002 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2003 ip_hdr(skb)->saddr,
2004 ip_hdr(skb)->daddr,
2005 0, IPPROTO_TCP, 0);
2006 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2007 }
2008 }
2009
2010 if (offload_type & SKB_GSO_TCPV6) {
2011 struct atl1c_tpd_ext_desc *etpd =
2012 *(struct atl1c_tpd_ext_desc **)(tpd);
2013
2014 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2015 *tpd = atl1c_get_tpd(adapter, type);
2016 ipv6_hdr(skb)->payload_len = 0;
2017 /* check payload == 0 byte ? */
2018 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2019 if (unlikely(skb->len == hdr_len)) {
2020 /* only xsum need */
2021 if (netif_msg_tx_queued(adapter))
2022 dev_warn(&pdev->dev,
2023 "IPV6 tso with zero data??\n");
2024 goto check_sum;
2025 } else
2026 tcp_v6_gso_csum_prep(skb);
2027
2028 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2029 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2030 etpd->pkt_len = cpu_to_le32(skb->len);
2031 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2032 }
2033
2034 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2035 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2036 TPD_TCPHDR_OFFSET_SHIFT;
2037 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2038 TPD_MSS_SHIFT;
2039 return 0;
2040 }
2041
2042 check_sum:
2043 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2044 u8 css, cso;
2045 cso = skb_checksum_start_offset(skb);
2046
2047 if (unlikely(cso & 0x1)) {
2048 if (netif_msg_tx_err(adapter))
2049 dev_err(&adapter->pdev->dev,
2050 "payload offset should not an event number\n");
2051 return -1;
2052 } else {
2053 css = cso + skb->csum_offset;
2054
2055 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2056 TPD_PLOADOFFSET_SHIFT;
2057 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2058 TPD_CCSUM_OFFSET_SHIFT;
2059 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2060 }
2061 }
2062 return 0;
2063 }
2064
2065 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2066 struct atl1c_tpd_desc *first_tpd,
2067 enum atl1c_trans_queue type)
2068 {
2069 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2070 struct atl1c_buffer *buffer_info;
2071 struct atl1c_tpd_desc *tpd;
2072 u16 first_index, index;
2073
2074 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2075 index = first_index;
2076 while (index != tpd_ring->next_to_use) {
2077 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2078 buffer_info = &tpd_ring->buffer_info[index];
2079 atl1c_clean_buffer(adpt->pdev, buffer_info);
2080 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2081 if (++index == tpd_ring->count)
2082 index = 0;
2083 }
2084 tpd_ring->next_to_use = first_index;
2085 }
2086
2087 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2088 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2089 enum atl1c_trans_queue type)
2090 {
2091 struct atl1c_tpd_desc *use_tpd = NULL;
2092 struct atl1c_buffer *buffer_info = NULL;
2093 u16 buf_len = skb_headlen(skb);
2094 u16 map_len = 0;
2095 u16 mapped_len = 0;
2096 u16 hdr_len = 0;
2097 u16 nr_frags;
2098 u16 f;
2099 int tso;
2100
2101 nr_frags = skb_shinfo(skb)->nr_frags;
2102 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2103 if (tso) {
2104 /* TSO */
2105 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2106 use_tpd = tpd;
2107
2108 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2109 buffer_info->length = map_len;
2110 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2111 skb->data, hdr_len,
2112 DMA_TO_DEVICE);
2113 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2114 goto err_dma;
2115 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2116 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2117 ATL1C_PCIMAP_TODEVICE);
2118 mapped_len += map_len;
2119 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2120 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2121 }
2122
2123 if (mapped_len < buf_len) {
2124 /* mapped_len == 0, means we should use the first tpd,
2125 which is given by caller */
2126 if (mapped_len == 0)
2127 use_tpd = tpd;
2128 else {
2129 use_tpd = atl1c_get_tpd(adapter, type);
2130 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2131 }
2132 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2133 buffer_info->length = buf_len - mapped_len;
2134 buffer_info->dma =
2135 dma_map_single(&adapter->pdev->dev,
2136 skb->data + mapped_len,
2137 buffer_info->length, DMA_TO_DEVICE);
2138 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2139 goto err_dma;
2140
2141 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2142 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2143 ATL1C_PCIMAP_TODEVICE);
2144 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2145 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2146 }
2147
2148 for (f = 0; f < nr_frags; f++) {
2149 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2150
2151 use_tpd = atl1c_get_tpd(adapter, type);
2152 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2153
2154 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2155 buffer_info->length = skb_frag_size(frag);
2156 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2157 frag, 0,
2158 buffer_info->length,
2159 DMA_TO_DEVICE);
2160 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2161 goto err_dma;
2162
2163 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2164 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2165 ATL1C_PCIMAP_TODEVICE);
2166 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2167 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2168 }
2169
2170 /* The last tpd */
2171 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2172 /* The last buffer info contain the skb address,
2173 so it will be free after unmap */
2174 buffer_info->skb = skb;
2175
2176 return 0;
2177
2178 err_dma:
2179 buffer_info->dma = 0;
2180 buffer_info->length = 0;
2181 return -1;
2182 }
2183
2184 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2185 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2186 {
2187 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2188 u16 reg;
2189
2190 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2191 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2192 }
2193
2194 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2195 struct net_device *netdev)
2196 {
2197 struct atl1c_adapter *adapter = netdev_priv(netdev);
2198 u16 tpd_req;
2199 struct atl1c_tpd_desc *tpd;
2200 enum atl1c_trans_queue type = atl1c_trans_normal;
2201
2202 if (test_bit(__AT_DOWN, &adapter->flags)) {
2203 dev_kfree_skb_any(skb);
2204 return NETDEV_TX_OK;
2205 }
2206
2207 tpd_req = atl1c_cal_tpd_req(skb);
2208
2209 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2210 /* no enough descriptor, just stop queue */
2211 netif_stop_queue(netdev);
2212 return NETDEV_TX_BUSY;
2213 }
2214
2215 tpd = atl1c_get_tpd(adapter, type);
2216
2217 /* do TSO and check sum */
2218 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2219 dev_kfree_skb_any(skb);
2220 return NETDEV_TX_OK;
2221 }
2222
2223 if (unlikely(skb_vlan_tag_present(skb))) {
2224 u16 vlan = skb_vlan_tag_get(skb);
2225 __le16 tag;
2226
2227 vlan = cpu_to_le16(vlan);
2228 AT_VLAN_TO_TAG(vlan, tag);
2229 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2230 tpd->vlan_tag = tag;
2231 }
2232
2233 if (skb_network_offset(skb) != ETH_HLEN)
2234 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2235
2236 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2237 netif_info(adapter, tx_done, adapter->netdev,
2238 "tx-skb dropped due to dma error\n");
2239 /* roll back tpd/buffer */
2240 atl1c_tx_rollback(adapter, tpd, type);
2241 dev_kfree_skb_any(skb);
2242 } else {
2243 netdev_sent_queue(adapter->netdev, skb->len);
2244 atl1c_tx_queue(adapter, skb, tpd, type);
2245 }
2246
2247 return NETDEV_TX_OK;
2248 }
2249
2250 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2251 {
2252 struct net_device *netdev = adapter->netdev;
2253
2254 free_irq(adapter->pdev->irq, netdev);
2255
2256 if (adapter->have_msi)
2257 pci_disable_msi(adapter->pdev);
2258 }
2259
2260 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2261 {
2262 struct pci_dev *pdev = adapter->pdev;
2263 struct net_device *netdev = adapter->netdev;
2264 int flags = 0;
2265 int err = 0;
2266
2267 adapter->have_msi = true;
2268 err = pci_enable_msi(adapter->pdev);
2269 if (err) {
2270 if (netif_msg_ifup(adapter))
2271 dev_err(&pdev->dev,
2272 "Unable to allocate MSI interrupt Error: %d\n",
2273 err);
2274 adapter->have_msi = false;
2275 }
2276
2277 if (!adapter->have_msi)
2278 flags |= IRQF_SHARED;
2279 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2280 netdev->name, netdev);
2281 if (err) {
2282 if (netif_msg_ifup(adapter))
2283 dev_err(&pdev->dev,
2284 "Unable to allocate interrupt Error: %d\n",
2285 err);
2286 if (adapter->have_msi)
2287 pci_disable_msi(adapter->pdev);
2288 return err;
2289 }
2290 if (netif_msg_ifup(adapter))
2291 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2292 return err;
2293 }
2294
2295
2296 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2297 {
2298 /* release tx-pending skbs and reset tx/rx ring index */
2299 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2300 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2301 atl1c_clean_rx_ring(adapter);
2302 }
2303
2304 static int atl1c_up(struct atl1c_adapter *adapter)
2305 {
2306 struct net_device *netdev = adapter->netdev;
2307 int err;
2308
2309 netif_carrier_off(netdev);
2310
2311 err = atl1c_configure(adapter);
2312 if (unlikely(err))
2313 goto err_up;
2314
2315 err = atl1c_request_irq(adapter);
2316 if (unlikely(err))
2317 goto err_up;
2318
2319 atl1c_check_link_status(adapter);
2320 clear_bit(__AT_DOWN, &adapter->flags);
2321 napi_enable(&adapter->napi);
2322 atl1c_irq_enable(adapter);
2323 netif_start_queue(netdev);
2324 return err;
2325
2326 err_up:
2327 atl1c_clean_rx_ring(adapter);
2328 return err;
2329 }
2330
2331 static void atl1c_down(struct atl1c_adapter *adapter)
2332 {
2333 struct net_device *netdev = adapter->netdev;
2334
2335 atl1c_del_timer(adapter);
2336 adapter->work_event = 0; /* clear all event */
2337 /* signal that we're down so the interrupt handler does not
2338 * reschedule our watchdog timer */
2339 set_bit(__AT_DOWN, &adapter->flags);
2340 netif_carrier_off(netdev);
2341 napi_disable(&adapter->napi);
2342 atl1c_irq_disable(adapter);
2343 atl1c_free_irq(adapter);
2344 /* disable ASPM if device inactive */
2345 atl1c_disable_l0s_l1(&adapter->hw);
2346 /* reset MAC to disable all RX/TX */
2347 atl1c_reset_mac(&adapter->hw);
2348 msleep(1);
2349
2350 adapter->link_speed = SPEED_0;
2351 adapter->link_duplex = -1;
2352 atl1c_reset_dma_ring(adapter);
2353 }
2354
2355 /**
2356 * atl1c_open - Called when a network interface is made active
2357 * @netdev: network interface device structure
2358 *
2359 * Returns 0 on success, negative value on failure
2360 *
2361 * The open entry point is called when a network interface is made
2362 * active by the system (IFF_UP). At this point all resources needed
2363 * for transmit and receive operations are allocated, the interrupt
2364 * handler is registered with the OS, the watchdog timer is started,
2365 * and the stack is notified that the interface is ready.
2366 */
2367 static int atl1c_open(struct net_device *netdev)
2368 {
2369 struct atl1c_adapter *adapter = netdev_priv(netdev);
2370 int err;
2371
2372 /* disallow open during test */
2373 if (test_bit(__AT_TESTING, &adapter->flags))
2374 return -EBUSY;
2375
2376 /* allocate rx/tx dma buffer & descriptors */
2377 err = atl1c_setup_ring_resources(adapter);
2378 if (unlikely(err))
2379 return err;
2380
2381 err = atl1c_up(adapter);
2382 if (unlikely(err))
2383 goto err_up;
2384
2385 return 0;
2386
2387 err_up:
2388 atl1c_free_irq(adapter);
2389 atl1c_free_ring_resources(adapter);
2390 atl1c_reset_mac(&adapter->hw);
2391 return err;
2392 }
2393
2394 /**
2395 * atl1c_close - Disables a network interface
2396 * @netdev: network interface device structure
2397 *
2398 * Returns 0, this is not allowed to fail
2399 *
2400 * The close entry point is called when an interface is de-activated
2401 * by the OS. The hardware is still under the drivers control, but
2402 * needs to be disabled. A global MAC reset is issued to stop the
2403 * hardware, and all transmit and receive resources are freed.
2404 */
2405 static int atl1c_close(struct net_device *netdev)
2406 {
2407 struct atl1c_adapter *adapter = netdev_priv(netdev);
2408
2409 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2410 set_bit(__AT_DOWN, &adapter->flags);
2411 cancel_work_sync(&adapter->common_task);
2412 atl1c_down(adapter);
2413 atl1c_free_ring_resources(adapter);
2414 return 0;
2415 }
2416
2417 static int atl1c_suspend(struct device *dev)
2418 {
2419 struct net_device *netdev = dev_get_drvdata(dev);
2420 struct atl1c_adapter *adapter = netdev_priv(netdev);
2421 struct atl1c_hw *hw = &adapter->hw;
2422 u32 wufc = adapter->wol;
2423
2424 atl1c_disable_l0s_l1(hw);
2425 if (netif_running(netdev)) {
2426 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2427 atl1c_down(adapter);
2428 }
2429 netif_device_detach(netdev);
2430
2431 if (wufc)
2432 if (atl1c_phy_to_ps_link(hw) != 0)
2433 dev_dbg(dev, "phy power saving failed");
2434
2435 atl1c_power_saving(hw, wufc);
2436
2437 return 0;
2438 }
2439
2440 #ifdef CONFIG_PM_SLEEP
2441 static int atl1c_resume(struct device *dev)
2442 {
2443 struct net_device *netdev = dev_get_drvdata(dev);
2444 struct atl1c_adapter *adapter = netdev_priv(netdev);
2445
2446 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2447 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2448
2449 atl1c_phy_reset(&adapter->hw);
2450 atl1c_reset_mac(&adapter->hw);
2451 atl1c_phy_init(&adapter->hw);
2452
2453 netif_device_attach(netdev);
2454 if (netif_running(netdev))
2455 atl1c_up(adapter);
2456
2457 return 0;
2458 }
2459 #endif
2460
2461 static void atl1c_shutdown(struct pci_dev *pdev)
2462 {
2463 struct net_device *netdev = pci_get_drvdata(pdev);
2464 struct atl1c_adapter *adapter = netdev_priv(netdev);
2465
2466 atl1c_suspend(&pdev->dev);
2467 pci_wake_from_d3(pdev, adapter->wol);
2468 pci_set_power_state(pdev, PCI_D3hot);
2469 }
2470
2471 static const struct net_device_ops atl1c_netdev_ops = {
2472 .ndo_open = atl1c_open,
2473 .ndo_stop = atl1c_close,
2474 .ndo_validate_addr = eth_validate_addr,
2475 .ndo_start_xmit = atl1c_xmit_frame,
2476 .ndo_set_mac_address = atl1c_set_mac_addr,
2477 .ndo_set_rx_mode = atl1c_set_multi,
2478 .ndo_change_mtu = atl1c_change_mtu,
2479 .ndo_fix_features = atl1c_fix_features,
2480 .ndo_set_features = atl1c_set_features,
2481 .ndo_do_ioctl = atl1c_ioctl,
2482 .ndo_tx_timeout = atl1c_tx_timeout,
2483 .ndo_get_stats = atl1c_get_stats,
2484 #ifdef CONFIG_NET_POLL_CONTROLLER
2485 .ndo_poll_controller = atl1c_netpoll,
2486 #endif
2487 };
2488
2489 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2490 {
2491 SET_NETDEV_DEV(netdev, &pdev->dev);
2492 pci_set_drvdata(pdev, netdev);
2493
2494 netdev->netdev_ops = &atl1c_netdev_ops;
2495 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2496 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2497 atl1c_set_ethtool_ops(netdev);
2498
2499 /* TODO: add when ready */
2500 netdev->hw_features = NETIF_F_SG |
2501 NETIF_F_HW_CSUM |
2502 NETIF_F_HW_VLAN_CTAG_RX |
2503 NETIF_F_TSO |
2504 NETIF_F_TSO6;
2505 netdev->features = netdev->hw_features |
2506 NETIF_F_HW_VLAN_CTAG_TX;
2507 return 0;
2508 }
2509
2510 /**
2511 * atl1c_probe - Device Initialization Routine
2512 * @pdev: PCI device information struct
2513 * @ent: entry in atl1c_pci_tbl
2514 *
2515 * Returns 0 on success, negative on failure
2516 *
2517 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2518 * The OS initialization, configuring of the adapter private structure,
2519 * and a hardware reset occur.
2520 */
2521 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2522 {
2523 struct net_device *netdev;
2524 struct atl1c_adapter *adapter;
2525 static int cards_found;
2526
2527 int err = 0;
2528
2529 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2530 err = pci_enable_device_mem(pdev);
2531 if (err) {
2532 dev_err(&pdev->dev, "cannot enable PCI device\n");
2533 return err;
2534 }
2535
2536 /*
2537 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2538 * shared register for the high 32 bits, so only a single, aligned,
2539 * 4 GB physical address range can be used at a time.
2540 *
2541 * Supporting 64-bit DMA on this hardware is more trouble than it's
2542 * worth. It is far easier to limit to 32-bit DMA than update
2543 * various kernel subsystems to support the mechanics required by a
2544 * fixed-high-32-bit system.
2545 */
2546 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2547 if (err) {
2548 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2549 goto err_dma;
2550 }
2551
2552 err = pci_request_regions(pdev, atl1c_driver_name);
2553 if (err) {
2554 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2555 goto err_pci_reg;
2556 }
2557
2558 pci_set_master(pdev);
2559
2560 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2561 if (netdev == NULL) {
2562 err = -ENOMEM;
2563 goto err_alloc_etherdev;
2564 }
2565
2566 err = atl1c_init_netdev(netdev, pdev);
2567 if (err) {
2568 dev_err(&pdev->dev, "init netdevice failed\n");
2569 goto err_init_netdev;
2570 }
2571 adapter = netdev_priv(netdev);
2572 adapter->bd_number = cards_found;
2573 adapter->netdev = netdev;
2574 adapter->pdev = pdev;
2575 adapter->hw.adapter = adapter;
2576 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2577 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2578 if (!adapter->hw.hw_addr) {
2579 err = -EIO;
2580 dev_err(&pdev->dev, "cannot map device registers\n");
2581 goto err_ioremap;
2582 }
2583
2584 /* init mii data */
2585 adapter->mii.dev = netdev;
2586 adapter->mii.mdio_read = atl1c_mdio_read;
2587 adapter->mii.mdio_write = atl1c_mdio_write;
2588 adapter->mii.phy_id_mask = 0x1f;
2589 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2590 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2591 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2592 /* setup the private structure */
2593 err = atl1c_sw_init(adapter);
2594 if (err) {
2595 dev_err(&pdev->dev, "net device private data init failed\n");
2596 goto err_sw_init;
2597 }
2598 /* set max MTU */
2599 atl1c_set_max_mtu(netdev);
2600
2601 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2602
2603 /* Init GPHY as early as possible due to power saving issue */
2604 atl1c_phy_reset(&adapter->hw);
2605
2606 err = atl1c_reset_mac(&adapter->hw);
2607 if (err) {
2608 err = -EIO;
2609 goto err_reset;
2610 }
2611
2612 /* reset the controller to
2613 * put the device in a known good starting state */
2614 err = atl1c_phy_init(&adapter->hw);
2615 if (err) {
2616 err = -EIO;
2617 goto err_reset;
2618 }
2619 if (atl1c_read_mac_addr(&adapter->hw)) {
2620 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2621 netdev->addr_assign_type = NET_ADDR_RANDOM;
2622 }
2623 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2624 if (netif_msg_probe(adapter))
2625 dev_dbg(&pdev->dev, "mac address : %pM\n",
2626 adapter->hw.mac_addr);
2627
2628 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2629 INIT_WORK(&adapter->common_task, atl1c_common_task);
2630 adapter->work_event = 0;
2631 err = register_netdev(netdev);
2632 if (err) {
2633 dev_err(&pdev->dev, "register netdevice failed\n");
2634 goto err_register;
2635 }
2636
2637 cards_found++;
2638 return 0;
2639
2640 err_reset:
2641 err_register:
2642 err_sw_init:
2643 iounmap(adapter->hw.hw_addr);
2644 err_init_netdev:
2645 err_ioremap:
2646 free_netdev(netdev);
2647 err_alloc_etherdev:
2648 pci_release_regions(pdev);
2649 err_pci_reg:
2650 err_dma:
2651 pci_disable_device(pdev);
2652 return err;
2653 }
2654
2655 /**
2656 * atl1c_remove - Device Removal Routine
2657 * @pdev: PCI device information struct
2658 *
2659 * atl1c_remove is called by the PCI subsystem to alert the driver
2660 * that it should release a PCI device. The could be caused by a
2661 * Hot-Plug event, or because the driver is going to be removed from
2662 * memory.
2663 */
2664 static void atl1c_remove(struct pci_dev *pdev)
2665 {
2666 struct net_device *netdev = pci_get_drvdata(pdev);
2667 struct atl1c_adapter *adapter = netdev_priv(netdev);
2668
2669 unregister_netdev(netdev);
2670 /* restore permanent address */
2671 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2672 atl1c_phy_disable(&adapter->hw);
2673
2674 iounmap(adapter->hw.hw_addr);
2675
2676 pci_release_regions(pdev);
2677 pci_disable_device(pdev);
2678 free_netdev(netdev);
2679 }
2680
2681 /**
2682 * atl1c_io_error_detected - called when PCI error is detected
2683 * @pdev: Pointer to PCI device
2684 * @state: The current pci connection state
2685 *
2686 * This function is called after a PCI bus error affecting
2687 * this device has been detected.
2688 */
2689 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2690 pci_channel_state_t state)
2691 {
2692 struct net_device *netdev = pci_get_drvdata(pdev);
2693 struct atl1c_adapter *adapter = netdev_priv(netdev);
2694
2695 netif_device_detach(netdev);
2696
2697 if (state == pci_channel_io_perm_failure)
2698 return PCI_ERS_RESULT_DISCONNECT;
2699
2700 if (netif_running(netdev))
2701 atl1c_down(adapter);
2702
2703 pci_disable_device(pdev);
2704
2705 /* Request a slot slot reset. */
2706 return PCI_ERS_RESULT_NEED_RESET;
2707 }
2708
2709 /**
2710 * atl1c_io_slot_reset - called after the pci bus has been reset.
2711 * @pdev: Pointer to PCI device
2712 *
2713 * Restart the card from scratch, as if from a cold-boot. Implementation
2714 * resembles the first-half of the e1000_resume routine.
2715 */
2716 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2717 {
2718 struct net_device *netdev = pci_get_drvdata(pdev);
2719 struct atl1c_adapter *adapter = netdev_priv(netdev);
2720
2721 if (pci_enable_device(pdev)) {
2722 if (netif_msg_hw(adapter))
2723 dev_err(&pdev->dev,
2724 "Cannot re-enable PCI device after reset\n");
2725 return PCI_ERS_RESULT_DISCONNECT;
2726 }
2727 pci_set_master(pdev);
2728
2729 pci_enable_wake(pdev, PCI_D3hot, 0);
2730 pci_enable_wake(pdev, PCI_D3cold, 0);
2731
2732 atl1c_reset_mac(&adapter->hw);
2733
2734 return PCI_ERS_RESULT_RECOVERED;
2735 }
2736
2737 /**
2738 * atl1c_io_resume - called when traffic can start flowing again.
2739 * @pdev: Pointer to PCI device
2740 *
2741 * This callback is called when the error recovery driver tells us that
2742 * its OK to resume normal operation. Implementation resembles the
2743 * second-half of the atl1c_resume routine.
2744 */
2745 static void atl1c_io_resume(struct pci_dev *pdev)
2746 {
2747 struct net_device *netdev = pci_get_drvdata(pdev);
2748 struct atl1c_adapter *adapter = netdev_priv(netdev);
2749
2750 if (netif_running(netdev)) {
2751 if (atl1c_up(adapter)) {
2752 if (netif_msg_hw(adapter))
2753 dev_err(&pdev->dev,
2754 "Cannot bring device back up after reset\n");
2755 return;
2756 }
2757 }
2758
2759 netif_device_attach(netdev);
2760 }
2761
2762 static const struct pci_error_handlers atl1c_err_handler = {
2763 .error_detected = atl1c_io_error_detected,
2764 .slot_reset = atl1c_io_slot_reset,
2765 .resume = atl1c_io_resume,
2766 };
2767
2768 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2769
2770 static struct pci_driver atl1c_driver = {
2771 .name = atl1c_driver_name,
2772 .id_table = atl1c_pci_tbl,
2773 .probe = atl1c_probe,
2774 .remove = atl1c_remove,
2775 .shutdown = atl1c_shutdown,
2776 .err_handler = &atl1c_err_handler,
2777 .driver.pm = &atl1c_pm_ops,
2778 };
2779
2780 module_pci_driver(atl1c_driver);
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