1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */
3 
4 #include <linux/types.h>
5 #include <linux/module.h>
6 #include <linux/pci.h>
7 #include <linux/netdevice.h>
8 #include <linux/string.h>
9 #include <linux/aer.h>
10 #include <linux/etherdevice.h>
11 #include <net/ip.h>
12 #include <linux/phy.h>
13 
14 #include "../libwx/wx_type.h"
15 #include "../libwx/wx_hw.h"
16 #include "../libwx/wx_lib.h"
17 #include "ngbe_type.h"
18 #include "ngbe_mdio.h"
19 #include "ngbe_hw.h"
20 #include "ngbe_ethtool.h"
21 
22 char ngbe_driver_name[] = "ngbe";
23 
24 /* ngbe_pci_tbl - PCI Device ID Table
25  *
26  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
27  *   Class, Class Mask, private data (not used) }
28  */
29 static const struct pci_device_id ngbe_pci_tbl[] = {
30 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL_W), 0},
31 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A2), 0},
32 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A2S), 0},
33 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A4), 0},
34 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A4S), 0},
35 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL2), 0},
36 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL2S), 0},
37 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL4), 0},
38 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL4S), 0},
39 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860LC), 0},
40 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A1), 0},
41 	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A1L), 0},
42 	/* required last entry */
43 	{ .device = 0 }
44 };
45 
46 /**
47  *  ngbe_init_type_code - Initialize the shared code
48  *  @wx: pointer to hardware structure
49  **/
50 static void ngbe_init_type_code(struct wx *wx)
51 {
52 	int wol_mask = 0, ncsi_mask = 0;
53 	u16 type_mask = 0, val;
54 
55 	wx->mac.type = wx_mac_em;
56 	type_mask = (u16)(wx->subsystem_device_id & NGBE_OEM_MASK);
57 	ncsi_mask = wx->subsystem_device_id & NGBE_NCSI_MASK;
58 	wol_mask = wx->subsystem_device_id & NGBE_WOL_MASK;
59 
60 	val = rd32(wx, WX_CFG_PORT_ST);
61 	wx->mac_type = (val & BIT(7)) >> 7 ?
62 		       em_mac_type_rgmii :
63 		       em_mac_type_mdi;
64 
65 	wx->wol_enabled = (wol_mask == NGBE_WOL_SUP) ? 1 : 0;
66 	wx->ncsi_enabled = (ncsi_mask == NGBE_NCSI_MASK ||
67 			   type_mask == NGBE_SUBID_OCP_CARD) ? 1 : 0;
68 
69 	switch (type_mask) {
70 	case NGBE_SUBID_LY_YT8521S_SFP:
71 	case NGBE_SUBID_LY_M88E1512_SFP:
72 	case NGBE_SUBID_YT8521S_SFP_GPIO:
73 	case NGBE_SUBID_INTERNAL_YT8521S_SFP_GPIO:
74 		wx->gpio_ctrl = 1;
75 		break;
76 	default:
77 		wx->gpio_ctrl = 0;
78 		break;
79 	}
80 }
81 
82 /**
83  * ngbe_init_rss_key - Initialize wx RSS key
84  * @wx: device handle
85  *
86  * Allocates and initializes the RSS key if it is not allocated.
87  **/
88 static inline int ngbe_init_rss_key(struct wx *wx)
89 {
90 	u32 *rss_key;
91 
92 	if (!wx->rss_key) {
93 		rss_key = kzalloc(WX_RSS_KEY_SIZE, GFP_KERNEL);
94 		if (unlikely(!rss_key))
95 			return -ENOMEM;
96 
97 		netdev_rss_key_fill(rss_key, WX_RSS_KEY_SIZE);
98 		wx->rss_key = rss_key;
99 	}
100 
101 	return 0;
102 }
103 
104 /**
105  * ngbe_sw_init - Initialize general software structures
106  * @wx: board private structure to initialize
107  **/
108 static int ngbe_sw_init(struct wx *wx)
109 {
110 	struct pci_dev *pdev = wx->pdev;
111 	u16 msix_count = 0;
112 	int err = 0;
113 
114 	wx->mac.num_rar_entries = NGBE_RAR_ENTRIES;
115 	wx->mac.max_rx_queues = NGBE_MAX_RX_QUEUES;
116 	wx->mac.max_tx_queues = NGBE_MAX_TX_QUEUES;
117 	wx->mac.mcft_size = NGBE_MC_TBL_SIZE;
118 	wx->mac.rx_pb_size = NGBE_RX_PB_SIZE;
119 	wx->mac.tx_pb_size = NGBE_TDB_PB_SZ;
120 
121 	/* PCI config space info */
122 	err = wx_sw_init(wx);
123 	if (err < 0) {
124 		wx_err(wx, "read of internal subsystem device id failed\n");
125 		return err;
126 	}
127 
128 	/* mac type, phy type , oem type */
129 	ngbe_init_type_code(wx);
130 
131 	/* Set common capability flags and settings */
132 	wx->max_q_vectors = NGBE_MAX_MSIX_VECTORS;
133 	err = wx_get_pcie_msix_counts(wx, &msix_count, NGBE_MAX_MSIX_VECTORS);
134 	if (err)
135 		dev_err(&pdev->dev, "Do not support MSI-X\n");
136 	wx->mac.max_msix_vectors = msix_count;
137 
138 	if (ngbe_init_rss_key(wx))
139 		return -ENOMEM;
140 
141 	/* enable itr by default in dynamic mode */
142 	wx->rx_itr_setting = 1;
143 	wx->tx_itr_setting = 1;
144 
145 	/* set default ring sizes */
146 	wx->tx_ring_count = NGBE_DEFAULT_TXD;
147 	wx->rx_ring_count = NGBE_DEFAULT_RXD;
148 
149 	/* set default work limits */
150 	wx->tx_work_limit = NGBE_DEFAULT_TX_WORK;
151 	wx->rx_work_limit = NGBE_DEFAULT_RX_WORK;
152 
153 	return 0;
154 }
155 
156 /**
157  * ngbe_irq_enable - Enable default interrupt generation settings
158  * @wx: board private structure
159  * @queues: enable all queues interrupts
160  **/
161 static void ngbe_irq_enable(struct wx *wx, bool queues)
162 {
163 	u32 mask;
164 
165 	/* enable misc interrupt */
166 	mask = NGBE_PX_MISC_IEN_MASK;
167 
168 	wr32(wx, WX_GPIO_DDR, WX_GPIO_DDR_0);
169 	wr32(wx, WX_GPIO_INTEN, WX_GPIO_INTEN_0 | WX_GPIO_INTEN_1);
170 	wr32(wx, WX_GPIO_INTTYPE_LEVEL, 0x0);
171 	wr32(wx, WX_GPIO_POLARITY, wx->gpio_ctrl ? 0 : 0x3);
172 
173 	wr32(wx, WX_PX_MISC_IEN, mask);
174 
175 	/* mask interrupt */
176 	if (queues)
177 		wx_intr_enable(wx, NGBE_INTR_ALL);
178 	else
179 		wx_intr_enable(wx, NGBE_INTR_MISC(wx));
180 }
181 
182 /**
183  * ngbe_intr - msi/legacy mode Interrupt Handler
184  * @irq: interrupt number
185  * @data: pointer to a network interface device structure
186  **/
187 static irqreturn_t ngbe_intr(int __always_unused irq, void *data)
188 {
189 	struct wx_q_vector *q_vector;
190 	struct wx *wx  = data;
191 	struct pci_dev *pdev;
192 	u32 eicr;
193 
194 	q_vector = wx->q_vector[0];
195 	pdev = wx->pdev;
196 
197 	eicr = wx_misc_isb(wx, WX_ISB_VEC0);
198 	if (!eicr) {
199 		/* shared interrupt alert!
200 		 * the interrupt that we masked before the EICR read.
201 		 */
202 		if (netif_running(wx->netdev))
203 			ngbe_irq_enable(wx, true);
204 		return IRQ_NONE;        /* Not our interrupt */
205 	}
206 	wx->isb_mem[WX_ISB_VEC0] = 0;
207 	if (!(pdev->msi_enabled))
208 		wr32(wx, WX_PX_INTA, 1);
209 
210 	wx->isb_mem[WX_ISB_MISC] = 0;
211 	/* would disable interrupts here but it is auto disabled */
212 	napi_schedule_irqoff(&q_vector->napi);
213 
214 	if (netif_running(wx->netdev))
215 		ngbe_irq_enable(wx, false);
216 
217 	return IRQ_HANDLED;
218 }
219 
220 static irqreturn_t ngbe_msix_other(int __always_unused irq, void *data)
221 {
222 	struct wx *wx = data;
223 
224 	/* re-enable the original interrupt state, no lsc, no queues */
225 	if (netif_running(wx->netdev))
226 		ngbe_irq_enable(wx, false);
227 
228 	return IRQ_HANDLED;
229 }
230 
231 /**
232  * ngbe_request_msix_irqs - Initialize MSI-X interrupts
233  * @wx: board private structure
234  *
235  * ngbe_request_msix_irqs allocates MSI-X vectors and requests
236  * interrupts from the kernel.
237  **/
238 static int ngbe_request_msix_irqs(struct wx *wx)
239 {
240 	struct net_device *netdev = wx->netdev;
241 	int vector, err;
242 
243 	for (vector = 0; vector < wx->num_q_vectors; vector++) {
244 		struct wx_q_vector *q_vector = wx->q_vector[vector];
245 		struct msix_entry *entry = &wx->msix_entries[vector];
246 
247 		if (q_vector->tx.ring && q_vector->rx.ring)
248 			snprintf(q_vector->name, sizeof(q_vector->name) - 1,
249 				 "%s-TxRx-%d", netdev->name, entry->entry);
250 		else
251 			/* skip this unused q_vector */
252 			continue;
253 
254 		err = request_irq(entry->vector, wx_msix_clean_rings, 0,
255 				  q_vector->name, q_vector);
256 		if (err) {
257 			wx_err(wx, "request_irq failed for MSIX interrupt %s Error: %d\n",
258 			       q_vector->name, err);
259 			goto free_queue_irqs;
260 		}
261 	}
262 
263 	err = request_irq(wx->msix_entries[vector].vector,
264 			  ngbe_msix_other, 0, netdev->name, wx);
265 
266 	if (err) {
267 		wx_err(wx, "request_irq for msix_other failed: %d\n", err);
268 		goto free_queue_irqs;
269 	}
270 
271 	return 0;
272 
273 free_queue_irqs:
274 	while (vector) {
275 		vector--;
276 		free_irq(wx->msix_entries[vector].vector,
277 			 wx->q_vector[vector]);
278 	}
279 	wx_reset_interrupt_capability(wx);
280 	return err;
281 }
282 
283 /**
284  * ngbe_request_irq - initialize interrupts
285  * @wx: board private structure
286  *
287  * Attempts to configure interrupts using the best available
288  * capabilities of the hardware and kernel.
289  **/
290 static int ngbe_request_irq(struct wx *wx)
291 {
292 	struct net_device *netdev = wx->netdev;
293 	struct pci_dev *pdev = wx->pdev;
294 	int err;
295 
296 	if (pdev->msix_enabled)
297 		err = ngbe_request_msix_irqs(wx);
298 	else if (pdev->msi_enabled)
299 		err = request_irq(pdev->irq, ngbe_intr, 0,
300 				  netdev->name, wx);
301 	else
302 		err = request_irq(pdev->irq, ngbe_intr, IRQF_SHARED,
303 				  netdev->name, wx);
304 
305 	if (err)
306 		wx_err(wx, "request_irq failed, Error %d\n", err);
307 
308 	return err;
309 }
310 
311 static void ngbe_disable_device(struct wx *wx)
312 {
313 	struct net_device *netdev = wx->netdev;
314 	u32 i;
315 
316 	/* disable all enabled rx queues */
317 	for (i = 0; i < wx->num_rx_queues; i++)
318 		/* this call also flushes the previous write */
319 		wx_disable_rx_queue(wx, wx->rx_ring[i]);
320 	/* disable receives */
321 	wx_disable_rx(wx);
322 	wx_napi_disable_all(wx);
323 	netif_tx_stop_all_queues(netdev);
324 	netif_tx_disable(netdev);
325 	if (wx->gpio_ctrl)
326 		ngbe_sfp_modules_txrx_powerctl(wx, false);
327 	wx_irq_disable(wx);
328 	/* disable transmits in the hardware now that interrupts are off */
329 	for (i = 0; i < wx->num_tx_queues; i++) {
330 		u8 reg_idx = wx->tx_ring[i]->reg_idx;
331 
332 		wr32(wx, WX_PX_TR_CFG(reg_idx), WX_PX_TR_CFG_SWFLSH);
333 	}
334 }
335 
336 static void ngbe_down(struct wx *wx)
337 {
338 	phy_stop(wx->phydev);
339 	ngbe_disable_device(wx);
340 	wx_clean_all_tx_rings(wx);
341 	wx_clean_all_rx_rings(wx);
342 }
343 
344 static void ngbe_up(struct wx *wx)
345 {
346 	wx_configure_vectors(wx);
347 
348 	/* make sure to complete pre-operations */
349 	smp_mb__before_atomic();
350 	wx_napi_enable_all(wx);
351 	/* enable transmits */
352 	netif_tx_start_all_queues(wx->netdev);
353 
354 	/* clear any pending interrupts, may auto mask */
355 	rd32(wx, WX_PX_IC);
356 	rd32(wx, WX_PX_MISC_IC);
357 	ngbe_irq_enable(wx, true);
358 	if (wx->gpio_ctrl)
359 		ngbe_sfp_modules_txrx_powerctl(wx, true);
360 
361 	phy_start(wx->phydev);
362 }
363 
364 /**
365  * ngbe_open - Called when a network interface is made active
366  * @netdev: network interface device structure
367  *
368  * Returns 0 on success, negative value on failure
369  *
370  * The open entry point is called when a network interface is made
371  * active by the system (IFF_UP).
372  **/
373 static int ngbe_open(struct net_device *netdev)
374 {
375 	struct wx *wx = netdev_priv(netdev);
376 	int err;
377 
378 	wx_control_hw(wx, true);
379 
380 	err = wx_setup_resources(wx);
381 	if (err)
382 		return err;
383 
384 	wx_configure(wx);
385 
386 	err = ngbe_request_irq(wx);
387 	if (err)
388 		goto err_free_resources;
389 
390 	err = ngbe_phy_connect(wx);
391 	if (err)
392 		goto err_free_irq;
393 
394 	err = netif_set_real_num_tx_queues(netdev, wx->num_tx_queues);
395 	if (err)
396 		goto err_dis_phy;
397 
398 	err = netif_set_real_num_rx_queues(netdev, wx->num_rx_queues);
399 	if (err)
400 		goto err_dis_phy;
401 
402 	ngbe_up(wx);
403 
404 	return 0;
405 err_dis_phy:
406 	phy_disconnect(wx->phydev);
407 err_free_irq:
408 	wx_free_irq(wx);
409 err_free_resources:
410 	wx_free_resources(wx);
411 	return err;
412 }
413 
414 /**
415  * ngbe_close - Disables a network interface
416  * @netdev: network interface device structure
417  *
418  * Returns 0, this is not allowed to fail
419  *
420  * The close entry point is called when an interface is de-activated
421  * by the OS.  The hardware is still under the drivers control, but
422  * needs to be disabled.  A global MAC reset is issued to stop the
423  * hardware, and all transmit and receive resources are freed.
424  **/
425 static int ngbe_close(struct net_device *netdev)
426 {
427 	struct wx *wx = netdev_priv(netdev);
428 
429 	ngbe_down(wx);
430 	wx_free_irq(wx);
431 	wx_free_resources(wx);
432 	phy_disconnect(wx->phydev);
433 	wx_control_hw(wx, false);
434 
435 	return 0;
436 }
437 
438 static void ngbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
439 {
440 	struct wx *wx = pci_get_drvdata(pdev);
441 	struct net_device *netdev;
442 
443 	netdev = wx->netdev;
444 	netif_device_detach(netdev);
445 
446 	rtnl_lock();
447 	if (netif_running(netdev))
448 		ngbe_down(wx);
449 	rtnl_unlock();
450 	wx_control_hw(wx, false);
451 
452 	pci_disable_device(pdev);
453 }
454 
455 static void ngbe_shutdown(struct pci_dev *pdev)
456 {
457 	struct wx *wx = pci_get_drvdata(pdev);
458 	bool wake;
459 
460 	wake = !!wx->wol;
461 
462 	ngbe_dev_shutdown(pdev, &wake);
463 
464 	if (system_state == SYSTEM_POWER_OFF) {
465 		pci_wake_from_d3(pdev, wake);
466 		pci_set_power_state(pdev, PCI_D3hot);
467 	}
468 }
469 
470 static const struct net_device_ops ngbe_netdev_ops = {
471 	.ndo_open               = ngbe_open,
472 	.ndo_stop               = ngbe_close,
473 	.ndo_start_xmit         = wx_xmit_frame,
474 	.ndo_set_rx_mode        = wx_set_rx_mode,
475 	.ndo_validate_addr      = eth_validate_addr,
476 	.ndo_set_mac_address    = wx_set_mac,
477 	.ndo_get_stats64        = wx_get_stats64,
478 };
479 
480 /**
481  * ngbe_probe - Device Initialization Routine
482  * @pdev: PCI device information struct
483  * @ent: entry in ngbe_pci_tbl
484  *
485  * Returns 0 on success, negative on failure
486  *
487  * ngbe_probe initializes an wx identified by a pci_dev structure.
488  * The OS initialization, configuring of the wx private structure,
489  * and a hardware reset occur.
490  **/
491 static int ngbe_probe(struct pci_dev *pdev,
492 		      const struct pci_device_id __always_unused *ent)
493 {
494 	struct net_device *netdev;
495 	u32 e2rom_cksum_cap = 0;
496 	struct wx *wx = NULL;
497 	static int func_nums;
498 	u16 e2rom_ver = 0;
499 	u32 etrack_id = 0;
500 	u32 saved_ver = 0;
501 	int err;
502 
503 	err = pci_enable_device_mem(pdev);
504 	if (err)
505 		return err;
506 
507 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
508 	if (err) {
509 		dev_err(&pdev->dev,
510 			"No usable DMA configuration, aborting\n");
511 		goto err_pci_disable_dev;
512 	}
513 
514 	err = pci_request_selected_regions(pdev,
515 					   pci_select_bars(pdev, IORESOURCE_MEM),
516 					   ngbe_driver_name);
517 	if (err) {
518 		dev_err(&pdev->dev,
519 			"pci_request_selected_regions failed %d\n", err);
520 		goto err_pci_disable_dev;
521 	}
522 
523 	pci_enable_pcie_error_reporting(pdev);
524 	pci_set_master(pdev);
525 
526 	netdev = devm_alloc_etherdev_mqs(&pdev->dev,
527 					 sizeof(struct wx),
528 					 NGBE_MAX_TX_QUEUES,
529 					 NGBE_MAX_RX_QUEUES);
530 	if (!netdev) {
531 		err = -ENOMEM;
532 		goto err_pci_release_regions;
533 	}
534 
535 	SET_NETDEV_DEV(netdev, &pdev->dev);
536 
537 	wx = netdev_priv(netdev);
538 	wx->netdev = netdev;
539 	wx->pdev = pdev;
540 	wx->msg_enable = BIT(3) - 1;
541 
542 	wx->hw_addr = devm_ioremap(&pdev->dev,
543 				   pci_resource_start(pdev, 0),
544 				   pci_resource_len(pdev, 0));
545 	if (!wx->hw_addr) {
546 		err = -EIO;
547 		goto err_pci_release_regions;
548 	}
549 
550 	wx->driver_name = ngbe_driver_name;
551 	ngbe_set_ethtool_ops(netdev);
552 	netdev->netdev_ops = &ngbe_netdev_ops;
553 
554 	netdev->features |= NETIF_F_HIGHDMA;
555 	netdev->features = NETIF_F_SG;
556 
557 	/* copy netdev features into list of user selectable features */
558 	netdev->hw_features |= netdev->features |
559 			       NETIF_F_RXALL;
560 
561 	netdev->priv_flags |= IFF_UNICAST_FLT;
562 	netdev->priv_flags |= IFF_SUPP_NOFCS;
563 
564 	netdev->min_mtu = ETH_MIN_MTU;
565 	netdev->max_mtu = NGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
566 
567 	wx->bd_number = func_nums;
568 	/* setup the private structure */
569 	err = ngbe_sw_init(wx);
570 	if (err)
571 		goto err_free_mac_table;
572 
573 	/* check if flash load is done after hw power up */
574 	err = wx_check_flash_load(wx, NGBE_SPI_ILDR_STATUS_PERST);
575 	if (err)
576 		goto err_free_mac_table;
577 	err = wx_check_flash_load(wx, NGBE_SPI_ILDR_STATUS_PWRRST);
578 	if (err)
579 		goto err_free_mac_table;
580 
581 	err = wx_mng_present(wx);
582 	if (err) {
583 		dev_err(&pdev->dev, "Management capability is not present\n");
584 		goto err_free_mac_table;
585 	}
586 
587 	err = ngbe_reset_hw(wx);
588 	if (err) {
589 		dev_err(&pdev->dev, "HW Init failed: %d\n", err);
590 		goto err_free_mac_table;
591 	}
592 
593 	if (wx->bus.func == 0) {
594 		wr32(wx, NGBE_CALSUM_CAP_STATUS, 0x0);
595 		wr32(wx, NGBE_EEPROM_VERSION_STORE_REG, 0x0);
596 	} else {
597 		e2rom_cksum_cap = rd32(wx, NGBE_CALSUM_CAP_STATUS);
598 		saved_ver = rd32(wx, NGBE_EEPROM_VERSION_STORE_REG);
599 	}
600 
601 	wx_init_eeprom_params(wx);
602 	if (wx->bus.func == 0 || e2rom_cksum_cap == 0) {
603 		/* make sure the EEPROM is ready */
604 		err = ngbe_eeprom_chksum_hostif(wx);
605 		if (err) {
606 			dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
607 			err = -EIO;
608 			goto err_free_mac_table;
609 		}
610 	}
611 
612 	wx->wol = 0;
613 	if (wx->wol_enabled)
614 		wx->wol = NGBE_PSR_WKUP_CTL_MAG;
615 
616 	wx->wol_enabled = !!(wx->wol);
617 	wr32(wx, NGBE_PSR_WKUP_CTL, wx->wol);
618 
619 	device_set_wakeup_enable(&pdev->dev, wx->wol);
620 
621 	/* Save off EEPROM version number and Option Rom version which
622 	 * together make a unique identify for the eeprom
623 	 */
624 	if (saved_ver) {
625 		etrack_id = saved_ver;
626 	} else {
627 		wx_read_ee_hostif(wx,
628 				  wx->eeprom.sw_region_offset + NGBE_EEPROM_VERSION_H,
629 				  &e2rom_ver);
630 		etrack_id = e2rom_ver << 16;
631 		wx_read_ee_hostif(wx,
632 				  wx->eeprom.sw_region_offset + NGBE_EEPROM_VERSION_L,
633 				  &e2rom_ver);
634 		etrack_id |= e2rom_ver;
635 		wr32(wx, NGBE_EEPROM_VERSION_STORE_REG, etrack_id);
636 	}
637 	snprintf(wx->eeprom_id, sizeof(wx->eeprom_id),
638 		 "0x%08x", etrack_id);
639 
640 	eth_hw_addr_set(netdev, wx->mac.perm_addr);
641 	wx_mac_set_default_filter(wx, wx->mac.perm_addr);
642 
643 	err = wx_init_interrupt_scheme(wx);
644 	if (err)
645 		goto err_free_mac_table;
646 
647 	/* phy Interface Configuration */
648 	err = ngbe_mdio_init(wx);
649 	if (err)
650 		goto err_clear_interrupt_scheme;
651 
652 	err = register_netdev(netdev);
653 	if (err)
654 		goto err_register;
655 
656 	pci_set_drvdata(pdev, wx);
657 
658 	netif_info(wx, probe, netdev,
659 		   "PHY: %s, PBA No: Wang Xun GbE Family Controller\n",
660 		   wx->mac_type == em_mac_type_mdi ? "Internal" : "External");
661 	netif_info(wx, probe, netdev, "%pM\n", netdev->dev_addr);
662 
663 	return 0;
664 
665 err_register:
666 	wx_control_hw(wx, false);
667 err_clear_interrupt_scheme:
668 	wx_clear_interrupt_scheme(wx);
669 err_free_mac_table:
670 	kfree(wx->mac_table);
671 err_pci_release_regions:
672 	pci_disable_pcie_error_reporting(pdev);
673 	pci_release_selected_regions(pdev,
674 				     pci_select_bars(pdev, IORESOURCE_MEM));
675 err_pci_disable_dev:
676 	pci_disable_device(pdev);
677 	return err;
678 }
679 
680 /**
681  * ngbe_remove - Device Removal Routine
682  * @pdev: PCI device information struct
683  *
684  * ngbe_remove is called by the PCI subsystem to alert the driver
685  * that it should release a PCI device.  The could be caused by a
686  * Hot-Plug event, or because the driver is going to be removed from
687  * memory.
688  **/
689 static void ngbe_remove(struct pci_dev *pdev)
690 {
691 	struct wx *wx = pci_get_drvdata(pdev);
692 	struct net_device *netdev;
693 
694 	netdev = wx->netdev;
695 	unregister_netdev(netdev);
696 	pci_release_selected_regions(pdev,
697 				     pci_select_bars(pdev, IORESOURCE_MEM));
698 
699 	kfree(wx->mac_table);
700 	wx_clear_interrupt_scheme(wx);
701 	pci_disable_pcie_error_reporting(pdev);
702 
703 	pci_disable_device(pdev);
704 }
705 
706 static struct pci_driver ngbe_driver = {
707 	.name     = ngbe_driver_name,
708 	.id_table = ngbe_pci_tbl,
709 	.probe    = ngbe_probe,
710 	.remove   = ngbe_remove,
711 	.shutdown = ngbe_shutdown,
712 };
713 
714 module_pci_driver(ngbe_driver);
715 
716 MODULE_DEVICE_TABLE(pci, ngbe_pci_tbl);
717 MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@net-swift.com>");
718 MODULE_DESCRIPTION("WangXun(R) Gigabit PCI Express Network Driver");
719 MODULE_LICENSE("GPL");
720