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.");
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, bool napi_mode);
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;
atl1c_pcie_patch(struct atl1c_hw * hw)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 */
atl1c_reset_pcie(struct atl1c_hw * hw,u32 flag)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 */
atl1c_irq_enable(struct atl1c_adapter * adapter)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 */
atl1c_irq_disable(struct atl1c_adapter * adapter)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 */
atl1c_irq_reset(struct atl1c_adapter * adapter)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 */
atl1c_wait_until_idle(struct atl1c_hw * hw,u32 modu_ctrl)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 */
atl1c_phy_config(struct timer_list * t)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
atl1c_reinit_locked(struct atl1c_adapter * adapter)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
atl1c_check_link_status(struct atl1c_adapter * adapter)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
atl1c_link_chg_event(struct atl1c_adapter * adapter)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
atl1c_common_task(struct work_struct * work)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
atl1c_del_timer(struct atl1c_adapter * adapter)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 */
atl1c_tx_timeout(struct net_device * netdev,unsigned int txqueue)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 */
atl1c_set_multi(struct net_device * netdev)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
__atl1c_vlan_mode(netdev_features_t features,u32 * mac_ctrl_data)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
atl1c_vlan_mode(struct net_device * netdev,netdev_features_t features)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
atl1c_restore_vlan(struct atl1c_adapter * adapter)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 */
atl1c_set_mac_addr(struct net_device * netdev,void * p)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
atl1c_set_rxbufsize(struct atl1c_adapter * adapter,struct net_device * dev)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 + NET_IP_ALIGN) +
474 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
475 adapter->rx_frag_size = roundup_pow_of_two(head_size);
476 }
477
atl1c_fix_features(struct net_device * netdev,netdev_features_t features)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
atl1c_set_features(struct net_device * netdev,netdev_features_t features)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
atl1c_set_max_mtu(struct net_device * netdev)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 */
atl1c_change_mtu(struct net_device * netdev,int new_mtu)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 */
atl1c_mdio_read(struct net_device * netdev,int phy_id,int reg_num)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
atl1c_mdio_write(struct net_device * netdev,int phy_id,int reg_num,int val)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
atl1c_mii_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)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
atl1c_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)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 */
atl1c_alloc_queues(struct atl1c_adapter * adapter)640 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
641 {
642 return 0;
643 }
644
atl1c_set_mac_type(struct atl1c_hw * hw)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
atl1c_setup_mac_funcs(struct atl1c_hw * hw)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
atl1c_patch_assign(struct atl1c_hw * hw)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 */
atl1c_sw_init(struct atl1c_adapter * adapter)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 spin_lock_init(&adapter->hw.intr_mask_lock);
817 set_bit(__AT_DOWN, &adapter->flags);
818
819 return 0;
820 }
821
atl1c_clean_buffer(struct pci_dev * pdev,struct atl1c_buffer * buffer_info)822 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
823 struct atl1c_buffer *buffer_info)
824 {
825 u16 pci_driection;
826 if (buffer_info->flags & ATL1C_BUFFER_FREE)
827 return;
828 if (buffer_info->dma) {
829 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
830 pci_driection = DMA_FROM_DEVICE;
831 else
832 pci_driection = DMA_TO_DEVICE;
833
834 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
835 dma_unmap_single(&pdev->dev, buffer_info->dma,
836 buffer_info->length, pci_driection);
837 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
838 dma_unmap_page(&pdev->dev, buffer_info->dma,
839 buffer_info->length, pci_driection);
840 }
841 if (buffer_info->skb)
842 dev_consume_skb_any(buffer_info->skb);
843 buffer_info->dma = 0;
844 buffer_info->skb = NULL;
845 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
846 }
847 /**
848 * atl1c_clean_tx_ring - Free Tx-skb
849 * @adapter: board private structure
850 * @type: type of transmit queue
851 */
atl1c_clean_tx_ring(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)852 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
853 enum atl1c_trans_queue type)
854 {
855 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
856 struct atl1c_buffer *buffer_info;
857 struct pci_dev *pdev = adapter->pdev;
858 u16 index, ring_count;
859
860 ring_count = tpd_ring->count;
861 for (index = 0; index < ring_count; index++) {
862 buffer_info = &tpd_ring->buffer_info[index];
863 atl1c_clean_buffer(pdev, buffer_info);
864 }
865
866 netdev_reset_queue(adapter->netdev);
867
868 /* Zero out Tx-buffers */
869 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
870 ring_count);
871 atomic_set(&tpd_ring->next_to_clean, 0);
872 tpd_ring->next_to_use = 0;
873 }
874
875 /**
876 * atl1c_clean_rx_ring - Free rx-reservation skbs
877 * @adapter: board private structure
878 */
atl1c_clean_rx_ring(struct atl1c_adapter * adapter)879 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
880 {
881 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
882 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
883 struct atl1c_buffer *buffer_info;
884 struct pci_dev *pdev = adapter->pdev;
885 int j;
886
887 for (j = 0; j < rfd_ring->count; j++) {
888 buffer_info = &rfd_ring->buffer_info[j];
889 atl1c_clean_buffer(pdev, buffer_info);
890 }
891 /* zero out the descriptor ring */
892 memset(rfd_ring->desc, 0, rfd_ring->size);
893 rfd_ring->next_to_clean = 0;
894 rfd_ring->next_to_use = 0;
895 rrd_ring->next_to_use = 0;
896 rrd_ring->next_to_clean = 0;
897 }
898
899 /*
900 * Read / Write Ptr Initialize:
901 */
atl1c_init_ring_ptrs(struct atl1c_adapter * adapter)902 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
903 {
904 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
905 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
906 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
907 struct atl1c_buffer *buffer_info;
908 int i, j;
909
910 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
911 tpd_ring[i].next_to_use = 0;
912 atomic_set(&tpd_ring[i].next_to_clean, 0);
913 buffer_info = tpd_ring[i].buffer_info;
914 for (j = 0; j < tpd_ring->count; j++)
915 ATL1C_SET_BUFFER_STATE(&buffer_info[i],
916 ATL1C_BUFFER_FREE);
917 }
918 rfd_ring->next_to_use = 0;
919 rfd_ring->next_to_clean = 0;
920 rrd_ring->next_to_use = 0;
921 rrd_ring->next_to_clean = 0;
922 for (j = 0; j < rfd_ring->count; j++) {
923 buffer_info = &rfd_ring->buffer_info[j];
924 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
925 }
926 }
927
928 /**
929 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
930 * @adapter: board private structure
931 *
932 * Free all transmit software resources
933 */
atl1c_free_ring_resources(struct atl1c_adapter * adapter)934 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
935 {
936 struct pci_dev *pdev = adapter->pdev;
937
938 dma_free_coherent(&pdev->dev, adapter->ring_header.size,
939 adapter->ring_header.desc, adapter->ring_header.dma);
940 adapter->ring_header.desc = NULL;
941
942 /* Note: just free tdp_ring.buffer_info,
943 * it contain rfd_ring.buffer_info, do not double free */
944 if (adapter->tpd_ring[0].buffer_info) {
945 kfree(adapter->tpd_ring[0].buffer_info);
946 adapter->tpd_ring[0].buffer_info = NULL;
947 }
948 if (adapter->rx_page) {
949 put_page(adapter->rx_page);
950 adapter->rx_page = NULL;
951 }
952 }
953
954 /**
955 * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
956 * @adapter: board private structure
957 *
958 * Return 0 on success, negative on failure
959 */
atl1c_setup_ring_resources(struct atl1c_adapter * adapter)960 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
961 {
962 struct pci_dev *pdev = adapter->pdev;
963 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
964 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
965 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
966 struct atl1c_ring_header *ring_header = &adapter->ring_header;
967 int size;
968 int i;
969 int count = 0;
970 int rx_desc_count = 0;
971 u32 offset = 0;
972
973 rrd_ring->count = rfd_ring->count;
974 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
975 tpd_ring[i].count = tpd_ring[0].count;
976
977 /* 2 tpd queue, one high priority queue,
978 * another normal priority queue */
979 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
980 rfd_ring->count);
981 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
982 if (unlikely(!tpd_ring->buffer_info))
983 goto err_nomem;
984
985 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
986 tpd_ring[i].buffer_info =
987 (tpd_ring->buffer_info + count);
988 count += tpd_ring[i].count;
989 }
990
991 rfd_ring->buffer_info =
992 (tpd_ring->buffer_info + count);
993 count += rfd_ring->count;
994 rx_desc_count += rfd_ring->count;
995
996 /*
997 * real ring DMA buffer
998 * each ring/block may need up to 8 bytes for alignment, hence the
999 * additional bytes tacked onto the end.
1000 */
1001 ring_header->size = size =
1002 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1003 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1004 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1005 8 * 4;
1006
1007 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1008 &ring_header->dma, GFP_KERNEL);
1009 if (unlikely(!ring_header->desc)) {
1010 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1011 goto err_nomem;
1012 }
1013 /* init TPD ring */
1014
1015 tpd_ring[0].dma = roundup(ring_header->dma, 8);
1016 offset = tpd_ring[0].dma - ring_header->dma;
1017 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1018 tpd_ring[i].dma = ring_header->dma + offset;
1019 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1020 tpd_ring[i].size =
1021 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1022 offset += roundup(tpd_ring[i].size, 8);
1023 }
1024 /* init RFD ring */
1025 rfd_ring->dma = ring_header->dma + offset;
1026 rfd_ring->desc = (u8 *) ring_header->desc + offset;
1027 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1028 offset += roundup(rfd_ring->size, 8);
1029
1030 /* init RRD ring */
1031 rrd_ring->dma = ring_header->dma + offset;
1032 rrd_ring->desc = (u8 *) ring_header->desc + offset;
1033 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1034 rrd_ring->count;
1035 offset += roundup(rrd_ring->size, 8);
1036
1037 return 0;
1038
1039 err_nomem:
1040 kfree(tpd_ring->buffer_info);
1041 return -ENOMEM;
1042 }
1043
atl1c_configure_des_ring(struct atl1c_adapter * adapter)1044 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1045 {
1046 struct atl1c_hw *hw = &adapter->hw;
1047 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1048 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1049 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1050 adapter->tpd_ring;
1051
1052 /* TPD */
1053 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1054 (u32)((tpd_ring[atl1c_trans_normal].dma &
1055 AT_DMA_HI_ADDR_MASK) >> 32));
1056 /* just enable normal priority TX queue */
1057 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1058 (u32)(tpd_ring[atl1c_trans_normal].dma &
1059 AT_DMA_LO_ADDR_MASK));
1060 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1061 (u32)(tpd_ring[atl1c_trans_high].dma &
1062 AT_DMA_LO_ADDR_MASK));
1063 AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1064 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1065
1066
1067 /* RFD */
1068 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1069 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1070 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1071 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1072
1073 AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1074 rfd_ring->count & RFD_RING_SIZE_MASK);
1075 AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1076 adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1077
1078 /* RRD */
1079 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1080 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1081 AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1082 (rrd_ring->count & RRD_RING_SIZE_MASK));
1083
1084 if (hw->nic_type == athr_l2c_b) {
1085 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1086 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1087 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1088 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1089 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1090 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1091 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/
1092 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/
1093 }
1094 /* Load all of base address above */
1095 AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1096 }
1097
atl1c_configure_tx(struct atl1c_adapter * adapter)1098 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1099 {
1100 struct atl1c_hw *hw = &adapter->hw;
1101 int max_pay_load;
1102 u16 tx_offload_thresh;
1103 u32 txq_ctrl_data;
1104
1105 tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1106 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1107 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1108 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1109 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1110 /*
1111 * if BIOS had changed the dam-read-max-length to an invalid value,
1112 * restore it to default value
1113 */
1114 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1115 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1116 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1117 }
1118 txq_ctrl_data =
1119 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1120 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1121
1122 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1123 }
1124
atl1c_configure_rx(struct atl1c_adapter * adapter)1125 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1126 {
1127 struct atl1c_hw *hw = &adapter->hw;
1128 u32 rxq_ctrl_data;
1129
1130 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1131 RXQ_RFD_BURST_NUM_SHIFT;
1132
1133 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1134 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1135
1136 /* aspm for gigabit */
1137 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1138 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1139 ASPM_THRUPUT_LIMIT_100M);
1140
1141 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1142 }
1143
atl1c_configure_dma(struct atl1c_adapter * adapter)1144 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1145 {
1146 struct atl1c_hw *hw = &adapter->hw;
1147 u32 dma_ctrl_data;
1148
1149 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1150 DMA_CTRL_RREQ_PRI_DATA |
1151 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1152 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1153 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1154
1155 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1156 }
1157
1158 /*
1159 * Stop the mac, transmit and receive units
1160 * hw - Struct containing variables accessed by shared code
1161 * return : 0 or idle status (if error)
1162 */
atl1c_stop_mac(struct atl1c_hw * hw)1163 static int atl1c_stop_mac(struct atl1c_hw *hw)
1164 {
1165 u32 data;
1166
1167 AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1168 data &= ~RXQ_CTRL_EN;
1169 AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1170
1171 AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1172 data &= ~TXQ_CTRL_EN;
1173 AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1174
1175 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1176
1177 AT_READ_REG(hw, REG_MAC_CTRL, &data);
1178 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1179 AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1180
1181 return (int)atl1c_wait_until_idle(hw,
1182 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1183 }
1184
atl1c_start_mac(struct atl1c_adapter * adapter)1185 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1186 {
1187 struct atl1c_hw *hw = &adapter->hw;
1188 u32 mac, txq, rxq;
1189
1190 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX;
1191 hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1192 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1193
1194 AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1195 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1196 AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1197
1198 txq |= TXQ_CTRL_EN;
1199 rxq |= RXQ_CTRL_EN;
1200 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1201 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1202 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1203 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1204 MAC_CTRL_HASH_ALG_CRC32;
1205 if (hw->mac_duplex)
1206 mac |= MAC_CTRL_DUPLX;
1207 else
1208 mac &= ~MAC_CTRL_DUPLX;
1209 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1210 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1211
1212 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1213 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1214 AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1215 }
1216
1217 /*
1218 * Reset the transmit and receive units; mask and clear all interrupts.
1219 * hw - Struct containing variables accessed by shared code
1220 * return : 0 or idle status (if error)
1221 */
atl1c_reset_mac(struct atl1c_hw * hw)1222 static int atl1c_reset_mac(struct atl1c_hw *hw)
1223 {
1224 struct atl1c_adapter *adapter = hw->adapter;
1225 struct pci_dev *pdev = adapter->pdev;
1226 u32 ctrl_data = 0;
1227
1228 atl1c_stop_mac(hw);
1229 /*
1230 * Issue Soft Reset to the MAC. This will reset the chip's
1231 * transmit, receive, DMA. It will not effect
1232 * the current PCI configuration. The global reset bit is self-
1233 * clearing, and should clear within a microsecond.
1234 */
1235 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1236 ctrl_data |= MASTER_CTRL_OOB_DIS;
1237 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1238
1239 AT_WRITE_FLUSH(hw);
1240 msleep(10);
1241 /* Wait at least 10ms for All module to be Idle */
1242
1243 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1244 dev_err(&pdev->dev,
1245 "MAC state machine can't be idle since"
1246 " disabled for 10ms second\n");
1247 return -1;
1248 }
1249 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1250
1251 /* driver control speed/duplex */
1252 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1253 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1254
1255 /* clk switch setting */
1256 AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1257 switch (hw->nic_type) {
1258 case athr_l2c_b:
1259 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1260 SERDES_MAC_CLK_SLOWDOWN);
1261 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1262 break;
1263 case athr_l2c_b2:
1264 case athr_l1d_2:
1265 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1266 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1267 break;
1268 default:
1269 break;
1270 }
1271
1272 return 0;
1273 }
1274
atl1c_disable_l0s_l1(struct atl1c_hw * hw)1275 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1276 {
1277 u16 ctrl_flags = hw->ctrl_flags;
1278
1279 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1280 atl1c_set_aspm(hw, SPEED_0);
1281 hw->ctrl_flags = ctrl_flags;
1282 }
1283
1284 /*
1285 * Set ASPM state.
1286 * Enable/disable L0s/L1 depend on link state.
1287 */
atl1c_set_aspm(struct atl1c_hw * hw,u16 link_speed)1288 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1289 {
1290 u32 pm_ctrl_data;
1291 u32 link_l1_timer;
1292
1293 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1294 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1295 PM_CTRL_ASPM_L0S_EN |
1296 PM_CTRL_MAC_ASPM_CHK);
1297 /* L1 timer */
1298 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1299 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1300 link_l1_timer =
1301 link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1302 L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1303 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1304 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1305 } else {
1306 link_l1_timer = hw->nic_type == athr_l2c_b ?
1307 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1308 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1309 link_l1_timer = 1;
1310 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1311 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1312 }
1313
1314 /* L0S/L1 enable */
1315 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1316 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1317 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1318 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1319
1320 /* l2cb & l1d & l2cb2 & l1d2 */
1321 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1322 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1323 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1324 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1325 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1326 PM_CTRL_SERDES_PD_EX_L1 |
1327 PM_CTRL_CLK_SWH_L1;
1328 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1329 PM_CTRL_SERDES_PLL_L1_EN |
1330 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1331 PM_CTRL_SA_DLY_EN |
1332 PM_CTRL_HOTRST);
1333 /* disable l0s if link down or l2cb */
1334 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1335 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1336 } else { /* l1c */
1337 pm_ctrl_data =
1338 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1339 if (link_speed != SPEED_0) {
1340 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1341 PM_CTRL_SERDES_PLL_L1_EN |
1342 PM_CTRL_SERDES_BUFS_RX_L1_EN;
1343 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1344 PM_CTRL_CLK_SWH_L1 |
1345 PM_CTRL_ASPM_L0S_EN |
1346 PM_CTRL_ASPM_L1_EN);
1347 } else { /* link down */
1348 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1349 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1350 PM_CTRL_SERDES_PLL_L1_EN |
1351 PM_CTRL_SERDES_BUFS_RX_L1_EN |
1352 PM_CTRL_ASPM_L0S_EN);
1353 }
1354 }
1355 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1356
1357 return;
1358 }
1359
1360 /**
1361 * atl1c_configure - Configure Transmit&Receive Unit after Reset
1362 * @adapter: board private structure
1363 *
1364 * Configure the Tx /Rx unit of the MAC after a reset.
1365 */
atl1c_configure_mac(struct atl1c_adapter * adapter)1366 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1367 {
1368 struct atl1c_hw *hw = &adapter->hw;
1369 u32 master_ctrl_data = 0;
1370 u32 intr_modrt_data;
1371 u32 data;
1372
1373 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1374 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1375 MASTER_CTRL_RX_ITIMER_EN |
1376 MASTER_CTRL_INT_RDCLR);
1377 /* clear interrupt status */
1378 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1379 /* Clear any WOL status */
1380 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1381 /* set Interrupt Clear Timer
1382 * HW will enable self to assert interrupt event to system after
1383 * waiting x-time for software to notify it accept interrupt.
1384 */
1385
1386 data = CLK_GATING_EN_ALL;
1387 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1388 if (hw->nic_type == athr_l2c_b)
1389 data &= ~CLK_GATING_RXMAC_EN;
1390 } else
1391 data = 0;
1392 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1393
1394 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1395 hw->ict & INT_RETRIG_TIMER_MASK);
1396
1397 atl1c_configure_des_ring(adapter);
1398
1399 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1400 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1401 IRQ_MODRT_TX_TIMER_SHIFT;
1402 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1403 IRQ_MODRT_RX_TIMER_SHIFT;
1404 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1405 master_ctrl_data |=
1406 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1407 }
1408
1409 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1410 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1411
1412 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1413 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1414
1415 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1416 hw->smb_timer & SMB_STAT_TIMER_MASK);
1417
1418 /* set MTU */
1419 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1420 VLAN_HLEN + ETH_FCS_LEN);
1421
1422 atl1c_configure_tx(adapter);
1423 atl1c_configure_rx(adapter);
1424 atl1c_configure_dma(adapter);
1425
1426 return 0;
1427 }
1428
atl1c_configure(struct atl1c_adapter * adapter)1429 static int atl1c_configure(struct atl1c_adapter *adapter)
1430 {
1431 struct net_device *netdev = adapter->netdev;
1432 int num;
1433
1434 atl1c_init_ring_ptrs(adapter);
1435 atl1c_set_multi(netdev);
1436 atl1c_restore_vlan(adapter);
1437
1438 num = atl1c_alloc_rx_buffer(adapter, false);
1439 if (unlikely(num == 0))
1440 return -ENOMEM;
1441
1442 if (atl1c_configure_mac(adapter))
1443 return -EIO;
1444
1445 return 0;
1446 }
1447
atl1c_update_hw_stats(struct atl1c_adapter * adapter)1448 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1449 {
1450 u16 hw_reg_addr = 0;
1451 unsigned long *stats_item = NULL;
1452 u32 data;
1453
1454 /* update rx status */
1455 hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1456 stats_item = &adapter->hw_stats.rx_ok;
1457 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1458 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1459 *stats_item += data;
1460 stats_item++;
1461 hw_reg_addr += 4;
1462 }
1463 /* update tx status */
1464 hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1465 stats_item = &adapter->hw_stats.tx_ok;
1466 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1467 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1468 *stats_item += data;
1469 stats_item++;
1470 hw_reg_addr += 4;
1471 }
1472 }
1473
1474 /**
1475 * atl1c_get_stats - Get System Network Statistics
1476 * @netdev: network interface device structure
1477 *
1478 * Returns the address of the device statistics structure.
1479 * The statistics are actually updated from the timer callback.
1480 */
atl1c_get_stats(struct net_device * netdev)1481 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1482 {
1483 struct atl1c_adapter *adapter = netdev_priv(netdev);
1484 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats;
1485 struct net_device_stats *net_stats = &netdev->stats;
1486
1487 atl1c_update_hw_stats(adapter);
1488 net_stats->rx_bytes = hw_stats->rx_byte_cnt;
1489 net_stats->tx_bytes = hw_stats->tx_byte_cnt;
1490 net_stats->multicast = hw_stats->rx_mcast;
1491 net_stats->collisions = hw_stats->tx_1_col +
1492 hw_stats->tx_2_col +
1493 hw_stats->tx_late_col +
1494 hw_stats->tx_abort_col;
1495
1496 net_stats->rx_errors = hw_stats->rx_frag +
1497 hw_stats->rx_fcs_err +
1498 hw_stats->rx_len_err +
1499 hw_stats->rx_sz_ov +
1500 hw_stats->rx_rrd_ov +
1501 hw_stats->rx_align_err +
1502 hw_stats->rx_rxf_ov;
1503
1504 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov;
1505 net_stats->rx_length_errors = hw_stats->rx_len_err;
1506 net_stats->rx_crc_errors = hw_stats->rx_fcs_err;
1507 net_stats->rx_frame_errors = hw_stats->rx_align_err;
1508 net_stats->rx_dropped = hw_stats->rx_rrd_ov;
1509
1510 net_stats->tx_errors = hw_stats->tx_late_col +
1511 hw_stats->tx_abort_col +
1512 hw_stats->tx_underrun +
1513 hw_stats->tx_trunc;
1514
1515 net_stats->tx_fifo_errors = hw_stats->tx_underrun;
1516 net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1517 net_stats->tx_window_errors = hw_stats->tx_late_col;
1518
1519 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1520 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1521
1522 return net_stats;
1523 }
1524
atl1c_clear_phy_int(struct atl1c_adapter * adapter)1525 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1526 {
1527 u16 phy_data;
1528
1529 spin_lock(&adapter->mdio_lock);
1530 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1531 spin_unlock(&adapter->mdio_lock);
1532 }
1533
atl1c_clean_tx(struct napi_struct * napi,int budget)1534 static int atl1c_clean_tx(struct napi_struct *napi, int budget)
1535 {
1536 struct atl1c_adapter *adapter =
1537 container_of(napi, struct atl1c_adapter, tx_napi);
1538 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[atl1c_trans_normal];
1539 struct atl1c_buffer *buffer_info;
1540 struct pci_dev *pdev = adapter->pdev;
1541 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1542 u16 hw_next_to_clean;
1543 unsigned int total_bytes = 0, total_packets = 0;
1544 unsigned long flags;
1545
1546 AT_READ_REGW(&adapter->hw, REG_TPD_PRI0_CIDX, &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 if (total_packets < budget) {
1568 napi_complete_done(napi, total_packets);
1569 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1570 adapter->hw.intr_mask |= ISR_TX_PKT;
1571 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1572 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1573 return total_packets;
1574 }
1575 return budget;
1576 }
1577
1578 /**
1579 * atl1c_intr - Interrupt Handler
1580 * @irq: interrupt number
1581 * @data: pointer to a network interface device structure
1582 */
atl1c_intr(int irq,void * data)1583 static irqreturn_t atl1c_intr(int irq, void *data)
1584 {
1585 struct net_device *netdev = data;
1586 struct atl1c_adapter *adapter = netdev_priv(netdev);
1587 struct pci_dev *pdev = adapter->pdev;
1588 struct atl1c_hw *hw = &adapter->hw;
1589 int max_ints = AT_MAX_INT_WORK;
1590 int handled = IRQ_NONE;
1591 u32 status;
1592 u32 reg_data;
1593
1594 do {
1595 AT_READ_REG(hw, REG_ISR, ®_data);
1596 status = reg_data & hw->intr_mask;
1597
1598 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1599 if (max_ints != AT_MAX_INT_WORK)
1600 handled = IRQ_HANDLED;
1601 break;
1602 }
1603 /* link event */
1604 if (status & ISR_GPHY)
1605 atl1c_clear_phy_int(adapter);
1606 /* Ack ISR */
1607 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1608 if (status & ISR_RX_PKT) {
1609 if (likely(napi_schedule_prep(&adapter->napi))) {
1610 spin_lock(&hw->intr_mask_lock);
1611 hw->intr_mask &= ~ISR_RX_PKT;
1612 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1613 spin_unlock(&hw->intr_mask_lock);
1614 __napi_schedule(&adapter->napi);
1615 }
1616 }
1617 if (status & ISR_TX_PKT) {
1618 if (napi_schedule_prep(&adapter->tx_napi)) {
1619 spin_lock(&hw->intr_mask_lock);
1620 hw->intr_mask &= ~ISR_TX_PKT;
1621 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1622 spin_unlock(&hw->intr_mask_lock);
1623 __napi_schedule(&adapter->tx_napi);
1624 }
1625 }
1626
1627 handled = IRQ_HANDLED;
1628 /* check if PCIE PHY Link down */
1629 if (status & ISR_ERROR) {
1630 if (netif_msg_hw(adapter))
1631 dev_err(&pdev->dev,
1632 "atl1c hardware error (status = 0x%x)\n",
1633 status & ISR_ERROR);
1634 /* reset MAC */
1635 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1636 schedule_work(&adapter->common_task);
1637 return IRQ_HANDLED;
1638 }
1639
1640 if (status & ISR_OVER)
1641 if (netif_msg_intr(adapter))
1642 dev_warn(&pdev->dev,
1643 "TX/RX overflow (status = 0x%x)\n",
1644 status & ISR_OVER);
1645
1646 /* link event */
1647 if (status & (ISR_GPHY | ISR_MANUAL)) {
1648 netdev->stats.tx_carrier_errors++;
1649 atl1c_link_chg_event(adapter);
1650 break;
1651 }
1652
1653 } while (--max_ints > 0);
1654 /* re-enable Interrupt*/
1655 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1656 return handled;
1657 }
1658
atl1c_rx_checksum(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_recv_ret_status * prrs)1659 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1660 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1661 {
1662 /*
1663 * The pid field in RRS in not correct sometimes, so we
1664 * cannot figure out if the packet is fragmented or not,
1665 * so we tell the KERNEL CHECKSUM_NONE
1666 */
1667 skb_checksum_none_assert(skb);
1668 }
1669
atl1c_alloc_skb(struct atl1c_adapter * adapter,bool napi_mode)1670 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter,
1671 bool napi_mode)
1672 {
1673 struct sk_buff *skb;
1674 struct page *page;
1675
1676 if (adapter->rx_frag_size > PAGE_SIZE) {
1677 if (likely(napi_mode))
1678 return napi_alloc_skb(&adapter->napi,
1679 adapter->rx_buffer_len);
1680 else
1681 return netdev_alloc_skb_ip_align(adapter->netdev,
1682 adapter->rx_buffer_len);
1683 }
1684
1685 page = adapter->rx_page;
1686 if (!page) {
1687 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1688 if (unlikely(!page))
1689 return NULL;
1690 adapter->rx_page_offset = 0;
1691 }
1692
1693 skb = build_skb(page_address(page) + adapter->rx_page_offset,
1694 adapter->rx_frag_size);
1695 if (likely(skb)) {
1696 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1697 adapter->rx_page_offset += adapter->rx_frag_size;
1698 if (adapter->rx_page_offset >= PAGE_SIZE)
1699 adapter->rx_page = NULL;
1700 else
1701 get_page(page);
1702 }
1703 return skb;
1704 }
1705
atl1c_alloc_rx_buffer(struct atl1c_adapter * adapter,bool napi_mode)1706 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, bool napi_mode)
1707 {
1708 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1709 struct pci_dev *pdev = adapter->pdev;
1710 struct atl1c_buffer *buffer_info, *next_info;
1711 struct sk_buff *skb;
1712 void *vir_addr = NULL;
1713 u16 num_alloc = 0;
1714 u16 rfd_next_to_use, next_next;
1715 struct atl1c_rx_free_desc *rfd_desc;
1716 dma_addr_t mapping;
1717
1718 next_next = rfd_next_to_use = rfd_ring->next_to_use;
1719 if (++next_next == rfd_ring->count)
1720 next_next = 0;
1721 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1722 next_info = &rfd_ring->buffer_info[next_next];
1723
1724 while (next_info->flags & ATL1C_BUFFER_FREE) {
1725 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1726
1727 skb = atl1c_alloc_skb(adapter, napi_mode);
1728 if (unlikely(!skb)) {
1729 if (netif_msg_rx_err(adapter))
1730 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1731 break;
1732 }
1733
1734 /*
1735 * Make buffer alignment 2 beyond a 16 byte boundary
1736 * this will result in a 16 byte aligned IP header after
1737 * the 14 byte MAC header is removed
1738 */
1739 vir_addr = skb->data;
1740 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1741 buffer_info->skb = skb;
1742 buffer_info->length = adapter->rx_buffer_len;
1743 mapping = dma_map_single(&pdev->dev, vir_addr,
1744 buffer_info->length, DMA_FROM_DEVICE);
1745 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1746 dev_kfree_skb(skb);
1747 buffer_info->skb = NULL;
1748 buffer_info->length = 0;
1749 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1750 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1751 break;
1752 }
1753 buffer_info->dma = mapping;
1754 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1755 ATL1C_PCIMAP_FROMDEVICE);
1756 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1757 rfd_next_to_use = next_next;
1758 if (++next_next == rfd_ring->count)
1759 next_next = 0;
1760 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1761 next_info = &rfd_ring->buffer_info[next_next];
1762 num_alloc++;
1763 }
1764
1765 if (num_alloc) {
1766 /* TODO: update mailbox here */
1767 wmb();
1768 rfd_ring->next_to_use = rfd_next_to_use;
1769 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1770 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1771 }
1772
1773 return num_alloc;
1774 }
1775
atl1c_clean_rrd(struct atl1c_rrd_ring * rrd_ring,struct atl1c_recv_ret_status * rrs,u16 num)1776 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1777 struct atl1c_recv_ret_status *rrs, u16 num)
1778 {
1779 u16 i;
1780 /* the relationship between rrd and rfd is one map one */
1781 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1782 rrd_ring->next_to_clean)) {
1783 rrs->word3 &= ~RRS_RXD_UPDATED;
1784 if (++rrd_ring->next_to_clean == rrd_ring->count)
1785 rrd_ring->next_to_clean = 0;
1786 }
1787 }
1788
atl1c_clean_rfd(struct atl1c_rfd_ring * rfd_ring,struct atl1c_recv_ret_status * rrs,u16 num)1789 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1790 struct atl1c_recv_ret_status *rrs, u16 num)
1791 {
1792 u16 i;
1793 u16 rfd_index;
1794 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1795
1796 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1797 RRS_RX_RFD_INDEX_MASK;
1798 for (i = 0; i < num; i++) {
1799 buffer_info[rfd_index].skb = NULL;
1800 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1801 ATL1C_BUFFER_FREE);
1802 if (++rfd_index == rfd_ring->count)
1803 rfd_index = 0;
1804 }
1805 rfd_ring->next_to_clean = rfd_index;
1806 }
1807
atl1c_clean_rx_irq(struct atl1c_adapter * adapter,int * work_done,int work_to_do)1808 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1809 int *work_done, int work_to_do)
1810 {
1811 u16 rfd_num, rfd_index;
1812 u16 count = 0;
1813 u16 length;
1814 struct pci_dev *pdev = adapter->pdev;
1815 struct net_device *netdev = adapter->netdev;
1816 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1817 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1818 struct sk_buff *skb;
1819 struct atl1c_recv_ret_status *rrs;
1820 struct atl1c_buffer *buffer_info;
1821
1822 while (1) {
1823 if (*work_done >= work_to_do)
1824 break;
1825 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1826 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1827 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1828 RRS_RX_RFD_CNT_MASK;
1829 if (unlikely(rfd_num != 1))
1830 /* TODO support mul rfd*/
1831 if (netif_msg_rx_err(adapter))
1832 dev_warn(&pdev->dev,
1833 "Multi rfd not support yet!\n");
1834 goto rrs_checked;
1835 } else {
1836 break;
1837 }
1838 rrs_checked:
1839 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1840 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1841 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1842 if (netif_msg_rx_err(adapter))
1843 dev_warn(&pdev->dev,
1844 "wrong packet! rrs word3 is %x\n",
1845 rrs->word3);
1846 continue;
1847 }
1848
1849 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1850 RRS_PKT_SIZE_MASK);
1851 /* Good Receive */
1852 if (likely(rfd_num == 1)) {
1853 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1854 RRS_RX_RFD_INDEX_MASK;
1855 buffer_info = &rfd_ring->buffer_info[rfd_index];
1856 dma_unmap_single(&pdev->dev, buffer_info->dma,
1857 buffer_info->length, DMA_FROM_DEVICE);
1858 skb = buffer_info->skb;
1859 } else {
1860 /* TODO */
1861 if (netif_msg_rx_err(adapter))
1862 dev_warn(&pdev->dev,
1863 "Multi rfd not support yet!\n");
1864 break;
1865 }
1866 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1867 skb_put(skb, length - ETH_FCS_LEN);
1868 skb->protocol = eth_type_trans(skb, netdev);
1869 atl1c_rx_checksum(adapter, skb, rrs);
1870 if (rrs->word3 & RRS_VLAN_INS) {
1871 u16 vlan;
1872
1873 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1874 vlan = le16_to_cpu(vlan);
1875 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1876 }
1877 napi_gro_receive(&adapter->napi, skb);
1878
1879 (*work_done)++;
1880 count++;
1881 }
1882 if (count)
1883 atl1c_alloc_rx_buffer(adapter, true);
1884 }
1885
1886 /**
1887 * atl1c_clean - NAPI Rx polling callback
1888 * @napi: napi info
1889 * @budget: limit of packets to clean
1890 */
atl1c_clean(struct napi_struct * napi,int budget)1891 static int atl1c_clean(struct napi_struct *napi, int budget)
1892 {
1893 struct atl1c_adapter *adapter =
1894 container_of(napi, struct atl1c_adapter, napi);
1895 int work_done = 0;
1896 unsigned long flags;
1897
1898 /* Keep link state information with original netdev */
1899 if (!netif_carrier_ok(adapter->netdev))
1900 goto quit_polling;
1901 /* just enable one RXQ */
1902 atl1c_clean_rx_irq(adapter, &work_done, budget);
1903
1904 if (work_done < budget) {
1905 quit_polling:
1906 napi_complete_done(napi, work_done);
1907 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1908 adapter->hw.intr_mask |= ISR_RX_PKT;
1909 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1910 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1911 }
1912 return work_done;
1913 }
1914
1915 #ifdef CONFIG_NET_POLL_CONTROLLER
1916
1917 /*
1918 * Polling 'interrupt' - used by things like netconsole to send skbs
1919 * without having to re-enable interrupts. It's not called while
1920 * the interrupt routine is executing.
1921 */
atl1c_netpoll(struct net_device * netdev)1922 static void atl1c_netpoll(struct net_device *netdev)
1923 {
1924 struct atl1c_adapter *adapter = netdev_priv(netdev);
1925
1926 disable_irq(adapter->pdev->irq);
1927 atl1c_intr(adapter->pdev->irq, netdev);
1928 enable_irq(adapter->pdev->irq);
1929 }
1930 #endif
1931
atl1c_tpd_avail(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)1932 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1933 {
1934 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1935 u16 next_to_use = 0;
1936 u16 next_to_clean = 0;
1937
1938 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1939 next_to_use = tpd_ring->next_to_use;
1940
1941 return (u16)(next_to_clean > next_to_use) ?
1942 (next_to_clean - next_to_use - 1) :
1943 (tpd_ring->count + next_to_clean - next_to_use - 1);
1944 }
1945
1946 /*
1947 * get next usable tpd
1948 * Note: should call atl1c_tdp_avail to make sure
1949 * there is enough tpd to use
1950 */
atl1c_get_tpd(struct atl1c_adapter * adapter,enum atl1c_trans_queue type)1951 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1952 enum atl1c_trans_queue type)
1953 {
1954 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1955 struct atl1c_tpd_desc *tpd_desc;
1956 u16 next_to_use = 0;
1957
1958 next_to_use = tpd_ring->next_to_use;
1959 if (++tpd_ring->next_to_use == tpd_ring->count)
1960 tpd_ring->next_to_use = 0;
1961 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1962 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1963 return tpd_desc;
1964 }
1965
1966 static struct atl1c_buffer *
atl1c_get_tx_buffer(struct atl1c_adapter * adapter,struct atl1c_tpd_desc * tpd)1967 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1968 {
1969 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1970
1971 return &tpd_ring->buffer_info[tpd -
1972 (struct atl1c_tpd_desc *)tpd_ring->desc];
1973 }
1974
1975 /* Calculate the transmit packet descript needed*/
atl1c_cal_tpd_req(const struct sk_buff * skb)1976 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1977 {
1978 u16 tpd_req;
1979 u16 proto_hdr_len = 0;
1980
1981 tpd_req = skb_shinfo(skb)->nr_frags + 1;
1982
1983 if (skb_is_gso(skb)) {
1984 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1985 if (proto_hdr_len < skb_headlen(skb))
1986 tpd_req++;
1987 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1988 tpd_req++;
1989 }
1990 return tpd_req;
1991 }
1992
atl1c_tso_csum(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc ** tpd,enum atl1c_trans_queue type)1993 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1994 struct sk_buff *skb,
1995 struct atl1c_tpd_desc **tpd,
1996 enum atl1c_trans_queue type)
1997 {
1998 struct pci_dev *pdev = adapter->pdev;
1999 unsigned short offload_type;
2000 u8 hdr_len;
2001 u32 real_len;
2002
2003 if (skb_is_gso(skb)) {
2004 int err;
2005
2006 err = skb_cow_head(skb, 0);
2007 if (err < 0)
2008 return err;
2009
2010 offload_type = skb_shinfo(skb)->gso_type;
2011
2012 if (offload_type & SKB_GSO_TCPV4) {
2013 real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2014 + ntohs(ip_hdr(skb)->tot_len));
2015
2016 if (real_len < skb->len)
2017 pskb_trim(skb, real_len);
2018
2019 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2020 if (unlikely(skb->len == hdr_len)) {
2021 /* only xsum need */
2022 if (netif_msg_tx_queued(adapter))
2023 dev_warn(&pdev->dev,
2024 "IPV4 tso with zero data??\n");
2025 goto check_sum;
2026 } else {
2027 ip_hdr(skb)->check = 0;
2028 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2029 ip_hdr(skb)->saddr,
2030 ip_hdr(skb)->daddr,
2031 0, IPPROTO_TCP, 0);
2032 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2033 }
2034 }
2035
2036 if (offload_type & SKB_GSO_TCPV6) {
2037 struct atl1c_tpd_ext_desc *etpd =
2038 *(struct atl1c_tpd_ext_desc **)(tpd);
2039
2040 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2041 *tpd = atl1c_get_tpd(adapter, type);
2042 ipv6_hdr(skb)->payload_len = 0;
2043 /* check payload == 0 byte ? */
2044 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2045 if (unlikely(skb->len == hdr_len)) {
2046 /* only xsum need */
2047 if (netif_msg_tx_queued(adapter))
2048 dev_warn(&pdev->dev,
2049 "IPV6 tso with zero data??\n");
2050 goto check_sum;
2051 } else
2052 tcp_v6_gso_csum_prep(skb);
2053
2054 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2055 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2056 etpd->pkt_len = cpu_to_le32(skb->len);
2057 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2058 }
2059
2060 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2061 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2062 TPD_TCPHDR_OFFSET_SHIFT;
2063 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2064 TPD_MSS_SHIFT;
2065 return 0;
2066 }
2067
2068 check_sum:
2069 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2070 u8 css, cso;
2071 cso = skb_checksum_start_offset(skb);
2072
2073 if (unlikely(cso & 0x1)) {
2074 if (netif_msg_tx_err(adapter))
2075 dev_err(&adapter->pdev->dev,
2076 "payload offset should not an event number\n");
2077 return -1;
2078 } else {
2079 css = cso + skb->csum_offset;
2080
2081 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2082 TPD_PLOADOFFSET_SHIFT;
2083 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2084 TPD_CCSUM_OFFSET_SHIFT;
2085 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2086 }
2087 }
2088 return 0;
2089 }
2090
atl1c_tx_rollback(struct atl1c_adapter * adpt,struct atl1c_tpd_desc * first_tpd,enum atl1c_trans_queue type)2091 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2092 struct atl1c_tpd_desc *first_tpd,
2093 enum atl1c_trans_queue type)
2094 {
2095 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2096 struct atl1c_buffer *buffer_info;
2097 struct atl1c_tpd_desc *tpd;
2098 u16 first_index, index;
2099
2100 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2101 index = first_index;
2102 while (index != tpd_ring->next_to_use) {
2103 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2104 buffer_info = &tpd_ring->buffer_info[index];
2105 atl1c_clean_buffer(adpt->pdev, buffer_info);
2106 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2107 if (++index == tpd_ring->count)
2108 index = 0;
2109 }
2110 tpd_ring->next_to_use = first_index;
2111 }
2112
atl1c_tx_map(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc * tpd,enum atl1c_trans_queue type)2113 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2114 struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2115 enum atl1c_trans_queue type)
2116 {
2117 struct atl1c_tpd_desc *use_tpd = NULL;
2118 struct atl1c_buffer *buffer_info = NULL;
2119 u16 buf_len = skb_headlen(skb);
2120 u16 map_len = 0;
2121 u16 mapped_len = 0;
2122 u16 hdr_len = 0;
2123 u16 nr_frags;
2124 u16 f;
2125 int tso;
2126
2127 nr_frags = skb_shinfo(skb)->nr_frags;
2128 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2129 if (tso) {
2130 /* TSO */
2131 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2132 use_tpd = tpd;
2133
2134 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2135 buffer_info->length = map_len;
2136 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2137 skb->data, hdr_len,
2138 DMA_TO_DEVICE);
2139 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2140 goto err_dma;
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 mapped_len += map_len;
2145 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2146 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2147 }
2148
2149 if (mapped_len < buf_len) {
2150 /* mapped_len == 0, means we should use the first tpd,
2151 which is given by caller */
2152 if (mapped_len == 0)
2153 use_tpd = tpd;
2154 else {
2155 use_tpd = atl1c_get_tpd(adapter, type);
2156 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2157 }
2158 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2159 buffer_info->length = buf_len - mapped_len;
2160 buffer_info->dma =
2161 dma_map_single(&adapter->pdev->dev,
2162 skb->data + mapped_len,
2163 buffer_info->length, DMA_TO_DEVICE);
2164 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2165 goto err_dma;
2166
2167 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2168 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2169 ATL1C_PCIMAP_TODEVICE);
2170 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2171 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2172 }
2173
2174 for (f = 0; f < nr_frags; f++) {
2175 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2176
2177 use_tpd = atl1c_get_tpd(adapter, type);
2178 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2179
2180 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2181 buffer_info->length = skb_frag_size(frag);
2182 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2183 frag, 0,
2184 buffer_info->length,
2185 DMA_TO_DEVICE);
2186 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2187 goto err_dma;
2188
2189 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2190 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2191 ATL1C_PCIMAP_TODEVICE);
2192 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2193 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2194 }
2195
2196 /* The last tpd */
2197 use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2198 /* The last buffer info contain the skb address,
2199 so it will be free after unmap */
2200 buffer_info->skb = skb;
2201
2202 return 0;
2203
2204 err_dma:
2205 buffer_info->dma = 0;
2206 buffer_info->length = 0;
2207 return -1;
2208 }
2209
atl1c_tx_queue(struct atl1c_adapter * adapter,struct sk_buff * skb,struct atl1c_tpd_desc * tpd,enum atl1c_trans_queue type)2210 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2211 struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2212 {
2213 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2214 u16 reg;
2215
2216 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2217 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2218 }
2219
atl1c_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2220 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2221 struct net_device *netdev)
2222 {
2223 struct atl1c_adapter *adapter = netdev_priv(netdev);
2224 u16 tpd_req;
2225 struct atl1c_tpd_desc *tpd;
2226 enum atl1c_trans_queue type = atl1c_trans_normal;
2227
2228 if (test_bit(__AT_DOWN, &adapter->flags)) {
2229 dev_kfree_skb_any(skb);
2230 return NETDEV_TX_OK;
2231 }
2232
2233 tpd_req = atl1c_cal_tpd_req(skb);
2234
2235 if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2236 /* no enough descriptor, just stop queue */
2237 netif_stop_queue(netdev);
2238 return NETDEV_TX_BUSY;
2239 }
2240
2241 tpd = atl1c_get_tpd(adapter, type);
2242
2243 /* do TSO and check sum */
2244 if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2245 dev_kfree_skb_any(skb);
2246 return NETDEV_TX_OK;
2247 }
2248
2249 if (unlikely(skb_vlan_tag_present(skb))) {
2250 u16 vlan = skb_vlan_tag_get(skb);
2251 __le16 tag;
2252
2253 vlan = cpu_to_le16(vlan);
2254 AT_VLAN_TO_TAG(vlan, tag);
2255 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2256 tpd->vlan_tag = tag;
2257 }
2258
2259 if (skb_network_offset(skb) != ETH_HLEN)
2260 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2261
2262 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2263 netif_info(adapter, tx_done, adapter->netdev,
2264 "tx-skb dropped due to dma error\n");
2265 /* roll back tpd/buffer */
2266 atl1c_tx_rollback(adapter, tpd, type);
2267 dev_kfree_skb_any(skb);
2268 } else {
2269 netdev_sent_queue(adapter->netdev, skb->len);
2270 atl1c_tx_queue(adapter, skb, tpd, type);
2271 }
2272
2273 return NETDEV_TX_OK;
2274 }
2275
atl1c_free_irq(struct atl1c_adapter * adapter)2276 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2277 {
2278 struct net_device *netdev = adapter->netdev;
2279
2280 free_irq(adapter->pdev->irq, netdev);
2281
2282 if (adapter->have_msi)
2283 pci_disable_msi(adapter->pdev);
2284 }
2285
atl1c_request_irq(struct atl1c_adapter * adapter)2286 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2287 {
2288 struct pci_dev *pdev = adapter->pdev;
2289 struct net_device *netdev = adapter->netdev;
2290 int flags = 0;
2291 int err = 0;
2292
2293 adapter->have_msi = true;
2294 err = pci_enable_msi(adapter->pdev);
2295 if (err) {
2296 if (netif_msg_ifup(adapter))
2297 dev_err(&pdev->dev,
2298 "Unable to allocate MSI interrupt Error: %d\n",
2299 err);
2300 adapter->have_msi = false;
2301 }
2302
2303 if (!adapter->have_msi)
2304 flags |= IRQF_SHARED;
2305 err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2306 netdev->name, netdev);
2307 if (err) {
2308 if (netif_msg_ifup(adapter))
2309 dev_err(&pdev->dev,
2310 "Unable to allocate interrupt Error: %d\n",
2311 err);
2312 if (adapter->have_msi)
2313 pci_disable_msi(adapter->pdev);
2314 return err;
2315 }
2316 if (netif_msg_ifup(adapter))
2317 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2318 return err;
2319 }
2320
2321
atl1c_reset_dma_ring(struct atl1c_adapter * adapter)2322 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2323 {
2324 /* release tx-pending skbs and reset tx/rx ring index */
2325 atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2326 atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2327 atl1c_clean_rx_ring(adapter);
2328 }
2329
atl1c_up(struct atl1c_adapter * adapter)2330 static int atl1c_up(struct atl1c_adapter *adapter)
2331 {
2332 struct net_device *netdev = adapter->netdev;
2333 int err;
2334
2335 netif_carrier_off(netdev);
2336
2337 err = atl1c_configure(adapter);
2338 if (unlikely(err))
2339 goto err_up;
2340
2341 err = atl1c_request_irq(adapter);
2342 if (unlikely(err))
2343 goto err_up;
2344
2345 atl1c_check_link_status(adapter);
2346 clear_bit(__AT_DOWN, &adapter->flags);
2347 napi_enable(&adapter->napi);
2348 napi_enable(&adapter->tx_napi);
2349 atl1c_irq_enable(adapter);
2350 netif_start_queue(netdev);
2351 return err;
2352
2353 err_up:
2354 atl1c_clean_rx_ring(adapter);
2355 return err;
2356 }
2357
atl1c_down(struct atl1c_adapter * adapter)2358 static void atl1c_down(struct atl1c_adapter *adapter)
2359 {
2360 struct net_device *netdev = adapter->netdev;
2361
2362 atl1c_del_timer(adapter);
2363 adapter->work_event = 0; /* clear all event */
2364 /* signal that we're down so the interrupt handler does not
2365 * reschedule our watchdog timer */
2366 set_bit(__AT_DOWN, &adapter->flags);
2367 netif_carrier_off(netdev);
2368 napi_disable(&adapter->napi);
2369 napi_disable(&adapter->tx_napi);
2370 atl1c_irq_disable(adapter);
2371 atl1c_free_irq(adapter);
2372 /* disable ASPM if device inactive */
2373 atl1c_disable_l0s_l1(&adapter->hw);
2374 /* reset MAC to disable all RX/TX */
2375 atl1c_reset_mac(&adapter->hw);
2376 msleep(1);
2377
2378 adapter->link_speed = SPEED_0;
2379 adapter->link_duplex = -1;
2380 atl1c_reset_dma_ring(adapter);
2381 }
2382
2383 /**
2384 * atl1c_open - Called when a network interface is made active
2385 * @netdev: network interface device structure
2386 *
2387 * Returns 0 on success, negative value on failure
2388 *
2389 * The open entry point is called when a network interface is made
2390 * active by the system (IFF_UP). At this point all resources needed
2391 * for transmit and receive operations are allocated, the interrupt
2392 * handler is registered with the OS, the watchdog timer is started,
2393 * and the stack is notified that the interface is ready.
2394 */
atl1c_open(struct net_device * netdev)2395 static int atl1c_open(struct net_device *netdev)
2396 {
2397 struct atl1c_adapter *adapter = netdev_priv(netdev);
2398 int err;
2399
2400 /* disallow open during test */
2401 if (test_bit(__AT_TESTING, &adapter->flags))
2402 return -EBUSY;
2403
2404 /* allocate rx/tx dma buffer & descriptors */
2405 err = atl1c_setup_ring_resources(adapter);
2406 if (unlikely(err))
2407 return err;
2408
2409 err = atl1c_up(adapter);
2410 if (unlikely(err))
2411 goto err_up;
2412
2413 return 0;
2414
2415 err_up:
2416 atl1c_free_irq(adapter);
2417 atl1c_free_ring_resources(adapter);
2418 atl1c_reset_mac(&adapter->hw);
2419 return err;
2420 }
2421
2422 /**
2423 * atl1c_close - Disables a network interface
2424 * @netdev: network interface device structure
2425 *
2426 * Returns 0, this is not allowed to fail
2427 *
2428 * The close entry point is called when an interface is de-activated
2429 * by the OS. The hardware is still under the drivers control, but
2430 * needs to be disabled. A global MAC reset is issued to stop the
2431 * hardware, and all transmit and receive resources are freed.
2432 */
atl1c_close(struct net_device * netdev)2433 static int atl1c_close(struct net_device *netdev)
2434 {
2435 struct atl1c_adapter *adapter = netdev_priv(netdev);
2436
2437 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2438 set_bit(__AT_DOWN, &adapter->flags);
2439 cancel_work_sync(&adapter->common_task);
2440 atl1c_down(adapter);
2441 atl1c_free_ring_resources(adapter);
2442 return 0;
2443 }
2444
atl1c_suspend(struct device * dev)2445 static int atl1c_suspend(struct device *dev)
2446 {
2447 struct net_device *netdev = dev_get_drvdata(dev);
2448 struct atl1c_adapter *adapter = netdev_priv(netdev);
2449 struct atl1c_hw *hw = &adapter->hw;
2450 u32 wufc = adapter->wol;
2451
2452 atl1c_disable_l0s_l1(hw);
2453 if (netif_running(netdev)) {
2454 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2455 atl1c_down(adapter);
2456 }
2457 netif_device_detach(netdev);
2458
2459 if (wufc)
2460 if (atl1c_phy_to_ps_link(hw) != 0)
2461 dev_dbg(dev, "phy power saving failed");
2462
2463 atl1c_power_saving(hw, wufc);
2464
2465 return 0;
2466 }
2467
2468 #ifdef CONFIG_PM_SLEEP
atl1c_resume(struct device * dev)2469 static int atl1c_resume(struct device *dev)
2470 {
2471 struct net_device *netdev = dev_get_drvdata(dev);
2472 struct atl1c_adapter *adapter = netdev_priv(netdev);
2473
2474 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2475 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2476
2477 atl1c_phy_reset(&adapter->hw);
2478 atl1c_reset_mac(&adapter->hw);
2479 atl1c_phy_init(&adapter->hw);
2480
2481 netif_device_attach(netdev);
2482 if (netif_running(netdev))
2483 atl1c_up(adapter);
2484
2485 return 0;
2486 }
2487 #endif
2488
atl1c_shutdown(struct pci_dev * pdev)2489 static void atl1c_shutdown(struct pci_dev *pdev)
2490 {
2491 struct net_device *netdev = pci_get_drvdata(pdev);
2492 struct atl1c_adapter *adapter = netdev_priv(netdev);
2493
2494 atl1c_suspend(&pdev->dev);
2495 pci_wake_from_d3(pdev, adapter->wol);
2496 pci_set_power_state(pdev, PCI_D3hot);
2497 }
2498
2499 static const struct net_device_ops atl1c_netdev_ops = {
2500 .ndo_open = atl1c_open,
2501 .ndo_stop = atl1c_close,
2502 .ndo_validate_addr = eth_validate_addr,
2503 .ndo_start_xmit = atl1c_xmit_frame,
2504 .ndo_set_mac_address = atl1c_set_mac_addr,
2505 .ndo_set_rx_mode = atl1c_set_multi,
2506 .ndo_change_mtu = atl1c_change_mtu,
2507 .ndo_fix_features = atl1c_fix_features,
2508 .ndo_set_features = atl1c_set_features,
2509 .ndo_do_ioctl = atl1c_ioctl,
2510 .ndo_tx_timeout = atl1c_tx_timeout,
2511 .ndo_get_stats = atl1c_get_stats,
2512 #ifdef CONFIG_NET_POLL_CONTROLLER
2513 .ndo_poll_controller = atl1c_netpoll,
2514 #endif
2515 };
2516
atl1c_init_netdev(struct net_device * netdev,struct pci_dev * pdev)2517 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2518 {
2519 SET_NETDEV_DEV(netdev, &pdev->dev);
2520 pci_set_drvdata(pdev, netdev);
2521
2522 netdev->netdev_ops = &atl1c_netdev_ops;
2523 netdev->watchdog_timeo = AT_TX_WATCHDOG;
2524 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2525 atl1c_set_ethtool_ops(netdev);
2526
2527 /* TODO: add when ready */
2528 netdev->hw_features = NETIF_F_SG |
2529 NETIF_F_HW_CSUM |
2530 NETIF_F_HW_VLAN_CTAG_RX |
2531 NETIF_F_TSO |
2532 NETIF_F_TSO6;
2533 netdev->features = netdev->hw_features |
2534 NETIF_F_HW_VLAN_CTAG_TX;
2535 return 0;
2536 }
2537
2538 /**
2539 * atl1c_probe - Device Initialization Routine
2540 * @pdev: PCI device information struct
2541 * @ent: entry in atl1c_pci_tbl
2542 *
2543 * Returns 0 on success, negative on failure
2544 *
2545 * atl1c_probe initializes an adapter identified by a pci_dev structure.
2546 * The OS initialization, configuring of the adapter private structure,
2547 * and a hardware reset occur.
2548 */
atl1c_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2549 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2550 {
2551 struct net_device *netdev;
2552 struct atl1c_adapter *adapter;
2553 static int cards_found;
2554
2555 int err = 0;
2556
2557 /* enable device (incl. PCI PM wakeup and hotplug setup) */
2558 err = pci_enable_device_mem(pdev);
2559 if (err) {
2560 dev_err(&pdev->dev, "cannot enable PCI device\n");
2561 return err;
2562 }
2563
2564 /*
2565 * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2566 * shared register for the high 32 bits, so only a single, aligned,
2567 * 4 GB physical address range can be used at a time.
2568 *
2569 * Supporting 64-bit DMA on this hardware is more trouble than it's
2570 * worth. It is far easier to limit to 32-bit DMA than update
2571 * various kernel subsystems to support the mechanics required by a
2572 * fixed-high-32-bit system.
2573 */
2574 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2575 if (err) {
2576 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2577 goto err_dma;
2578 }
2579
2580 err = pci_request_regions(pdev, atl1c_driver_name);
2581 if (err) {
2582 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2583 goto err_pci_reg;
2584 }
2585
2586 pci_set_master(pdev);
2587
2588 netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2589 if (netdev == NULL) {
2590 err = -ENOMEM;
2591 goto err_alloc_etherdev;
2592 }
2593
2594 err = atl1c_init_netdev(netdev, pdev);
2595 if (err) {
2596 dev_err(&pdev->dev, "init netdevice failed\n");
2597 goto err_init_netdev;
2598 }
2599 adapter = netdev_priv(netdev);
2600 adapter->bd_number = cards_found;
2601 adapter->netdev = netdev;
2602 adapter->pdev = pdev;
2603 adapter->hw.adapter = adapter;
2604 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2605 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2606 if (!adapter->hw.hw_addr) {
2607 err = -EIO;
2608 dev_err(&pdev->dev, "cannot map device registers\n");
2609 goto err_ioremap;
2610 }
2611
2612 /* init mii data */
2613 adapter->mii.dev = netdev;
2614 adapter->mii.mdio_read = atl1c_mdio_read;
2615 adapter->mii.mdio_write = atl1c_mdio_write;
2616 adapter->mii.phy_id_mask = 0x1f;
2617 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2618 dev_set_threaded(netdev, true);
2619 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2620 netif_napi_add(netdev, &adapter->tx_napi, atl1c_clean_tx, 64);
2621 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2622 /* setup the private structure */
2623 err = atl1c_sw_init(adapter);
2624 if (err) {
2625 dev_err(&pdev->dev, "net device private data init failed\n");
2626 goto err_sw_init;
2627 }
2628 /* set max MTU */
2629 atl1c_set_max_mtu(netdev);
2630
2631 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2632
2633 /* Init GPHY as early as possible due to power saving issue */
2634 atl1c_phy_reset(&adapter->hw);
2635
2636 err = atl1c_reset_mac(&adapter->hw);
2637 if (err) {
2638 err = -EIO;
2639 goto err_reset;
2640 }
2641
2642 /* reset the controller to
2643 * put the device in a known good starting state */
2644 err = atl1c_phy_init(&adapter->hw);
2645 if (err) {
2646 err = -EIO;
2647 goto err_reset;
2648 }
2649 if (atl1c_read_mac_addr(&adapter->hw)) {
2650 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2651 netdev->addr_assign_type = NET_ADDR_RANDOM;
2652 }
2653 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2654 if (netif_msg_probe(adapter))
2655 dev_dbg(&pdev->dev, "mac address : %pM\n",
2656 adapter->hw.mac_addr);
2657
2658 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2659 INIT_WORK(&adapter->common_task, atl1c_common_task);
2660 adapter->work_event = 0;
2661 err = register_netdev(netdev);
2662 if (err) {
2663 dev_err(&pdev->dev, "register netdevice failed\n");
2664 goto err_register;
2665 }
2666
2667 cards_found++;
2668 return 0;
2669
2670 err_reset:
2671 err_register:
2672 err_sw_init:
2673 iounmap(adapter->hw.hw_addr);
2674 err_init_netdev:
2675 err_ioremap:
2676 free_netdev(netdev);
2677 err_alloc_etherdev:
2678 pci_release_regions(pdev);
2679 err_pci_reg:
2680 err_dma:
2681 pci_disable_device(pdev);
2682 return err;
2683 }
2684
2685 /**
2686 * atl1c_remove - Device Removal Routine
2687 * @pdev: PCI device information struct
2688 *
2689 * atl1c_remove is called by the PCI subsystem to alert the driver
2690 * that it should release a PCI device. The could be caused by a
2691 * Hot-Plug event, or because the driver is going to be removed from
2692 * memory.
2693 */
atl1c_remove(struct pci_dev * pdev)2694 static void atl1c_remove(struct pci_dev *pdev)
2695 {
2696 struct net_device *netdev = pci_get_drvdata(pdev);
2697 struct atl1c_adapter *adapter = netdev_priv(netdev);
2698
2699 unregister_netdev(netdev);
2700 /* restore permanent address */
2701 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2702 atl1c_phy_disable(&adapter->hw);
2703
2704 iounmap(adapter->hw.hw_addr);
2705
2706 pci_release_regions(pdev);
2707 pci_disable_device(pdev);
2708 free_netdev(netdev);
2709 }
2710
2711 /**
2712 * atl1c_io_error_detected - called when PCI error is detected
2713 * @pdev: Pointer to PCI device
2714 * @state: The current pci connection state
2715 *
2716 * This function is called after a PCI bus error affecting
2717 * this device has been detected.
2718 */
atl1c_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)2719 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2720 pci_channel_state_t state)
2721 {
2722 struct net_device *netdev = pci_get_drvdata(pdev);
2723 struct atl1c_adapter *adapter = netdev_priv(netdev);
2724
2725 netif_device_detach(netdev);
2726
2727 if (state == pci_channel_io_perm_failure)
2728 return PCI_ERS_RESULT_DISCONNECT;
2729
2730 if (netif_running(netdev))
2731 atl1c_down(adapter);
2732
2733 pci_disable_device(pdev);
2734
2735 /* Request a slot slot reset. */
2736 return PCI_ERS_RESULT_NEED_RESET;
2737 }
2738
2739 /**
2740 * atl1c_io_slot_reset - called after the pci bus has been reset.
2741 * @pdev: Pointer to PCI device
2742 *
2743 * Restart the card from scratch, as if from a cold-boot. Implementation
2744 * resembles the first-half of the e1000_resume routine.
2745 */
atl1c_io_slot_reset(struct pci_dev * pdev)2746 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2747 {
2748 struct net_device *netdev = pci_get_drvdata(pdev);
2749 struct atl1c_adapter *adapter = netdev_priv(netdev);
2750
2751 if (pci_enable_device(pdev)) {
2752 if (netif_msg_hw(adapter))
2753 dev_err(&pdev->dev,
2754 "Cannot re-enable PCI device after reset\n");
2755 return PCI_ERS_RESULT_DISCONNECT;
2756 }
2757 pci_set_master(pdev);
2758
2759 pci_enable_wake(pdev, PCI_D3hot, 0);
2760 pci_enable_wake(pdev, PCI_D3cold, 0);
2761
2762 atl1c_reset_mac(&adapter->hw);
2763
2764 return PCI_ERS_RESULT_RECOVERED;
2765 }
2766
2767 /**
2768 * atl1c_io_resume - called when traffic can start flowing again.
2769 * @pdev: Pointer to PCI device
2770 *
2771 * This callback is called when the error recovery driver tells us that
2772 * its OK to resume normal operation. Implementation resembles the
2773 * second-half of the atl1c_resume routine.
2774 */
atl1c_io_resume(struct pci_dev * pdev)2775 static void atl1c_io_resume(struct pci_dev *pdev)
2776 {
2777 struct net_device *netdev = pci_get_drvdata(pdev);
2778 struct atl1c_adapter *adapter = netdev_priv(netdev);
2779
2780 if (netif_running(netdev)) {
2781 if (atl1c_up(adapter)) {
2782 if (netif_msg_hw(adapter))
2783 dev_err(&pdev->dev,
2784 "Cannot bring device back up after reset\n");
2785 return;
2786 }
2787 }
2788
2789 netif_device_attach(netdev);
2790 }
2791
2792 static const struct pci_error_handlers atl1c_err_handler = {
2793 .error_detected = atl1c_io_error_detected,
2794 .slot_reset = atl1c_io_slot_reset,
2795 .resume = atl1c_io_resume,
2796 };
2797
2798 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2799
2800 static struct pci_driver atl1c_driver = {
2801 .name = atl1c_driver_name,
2802 .id_table = atl1c_pci_tbl,
2803 .probe = atl1c_probe,
2804 .remove = atl1c_remove,
2805 .shutdown = atl1c_shutdown,
2806 .err_handler = &atl1c_err_handler,
2807 .driver.pm = &atl1c_pm_ops,
2808 };
2809
2810 module_pci_driver(atl1c_driver);
2811