1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2015 - 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/etherdevice.h>
10 #include <linux/phylink.h>
11 #include <net/ip.h>
12 #include <linux/if_vlan.h>
13
14 #include "../libwx/wx_type.h"
15 #include "../libwx/wx_lib.h"
16 #include "../libwx/wx_hw.h"
17 #include "txgbe_type.h"
18 #include "txgbe_hw.h"
19 #include "txgbe_phy.h"
20 #include "txgbe_ethtool.h"
21
22 char txgbe_driver_name[] = "txgbe";
23
24 /* txgbe_pci_tbl - PCI Device ID Table
25 *
26 * Wildcard entries (PCI_ANY_ID) should come last
27 * Last entry must be all 0s
28 *
29 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
30 * Class, Class Mask, private data (not used) }
31 */
32 static const struct pci_device_id txgbe_pci_tbl[] = {
33 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_SP1000), 0},
34 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_WX1820), 0},
35 /* required last entry */
36 { .device = 0 }
37 };
38
39 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
40
txgbe_check_minimum_link(struct wx * wx)41 static void txgbe_check_minimum_link(struct wx *wx)
42 {
43 struct pci_dev *pdev;
44
45 pdev = wx->pdev;
46 pcie_print_link_status(pdev);
47 }
48
49 /**
50 * txgbe_enumerate_functions - Get the number of ports this device has
51 * @wx: wx structure
52 *
53 * This function enumerates the phsyical functions co-located on a single slot,
54 * in order to determine how many ports a device has. This is most useful in
55 * determining the required GT/s of PCIe bandwidth necessary for optimal
56 * performance.
57 **/
txgbe_enumerate_functions(struct wx * wx)58 static int txgbe_enumerate_functions(struct wx *wx)
59 {
60 struct pci_dev *entry, *pdev = wx->pdev;
61 int physfns = 0;
62
63 list_for_each_entry(entry, &pdev->bus->devices, bus_list) {
64 /* When the devices on the bus don't all match our device ID,
65 * we can't reliably determine the correct number of
66 * functions. This can occur if a function has been direct
67 * attached to a virtual machine using VT-d.
68 */
69 if (entry->vendor != pdev->vendor ||
70 entry->device != pdev->device)
71 return -EINVAL;
72
73 physfns++;
74 }
75
76 return physfns;
77 }
78
79 /**
80 * txgbe_irq_enable - Enable default interrupt generation settings
81 * @wx: pointer to private structure
82 * @queues: enable irqs for queues
83 **/
txgbe_irq_enable(struct wx * wx,bool queues)84 static void txgbe_irq_enable(struct wx *wx, bool queues)
85 {
86 wr32(wx, WX_PX_MISC_IEN, TXGBE_PX_MISC_IEN_MASK);
87
88 /* unmask interrupt */
89 wx_intr_enable(wx, TXGBE_INTR_MISC);
90 if (queues)
91 wx_intr_enable(wx, TXGBE_INTR_QALL(wx));
92 }
93
94 /**
95 * txgbe_intr - msi/legacy mode Interrupt Handler
96 * @irq: interrupt number
97 * @data: pointer to a network interface device structure
98 **/
txgbe_intr(int __always_unused irq,void * data)99 static irqreturn_t txgbe_intr(int __always_unused irq, void *data)
100 {
101 struct wx_q_vector *q_vector;
102 struct wx *wx = data;
103 struct pci_dev *pdev;
104 u32 eicr;
105
106 q_vector = wx->q_vector[0];
107 pdev = wx->pdev;
108
109 eicr = wx_misc_isb(wx, WX_ISB_VEC0);
110 if (!eicr) {
111 /* shared interrupt alert!
112 * the interrupt that we masked before the ICR read.
113 */
114 if (netif_running(wx->netdev))
115 txgbe_irq_enable(wx, true);
116 return IRQ_NONE; /* Not our interrupt */
117 }
118 wx->isb_mem[WX_ISB_VEC0] = 0;
119 if (!(pdev->msi_enabled))
120 wr32(wx, WX_PX_INTA, 1);
121
122 wx->isb_mem[WX_ISB_MISC] = 0;
123 /* would disable interrupts here but it is auto disabled */
124 napi_schedule_irqoff(&q_vector->napi);
125
126 /* re-enable link(maybe) and non-queue interrupts, no flush.
127 * txgbe_poll will re-enable the queue interrupts
128 */
129 if (netif_running(wx->netdev))
130 txgbe_irq_enable(wx, false);
131
132 return IRQ_HANDLED;
133 }
134
135 /**
136 * txgbe_request_msix_irqs - Initialize MSI-X interrupts
137 * @wx: board private structure
138 *
139 * Allocate MSI-X vectors and request interrupts from the kernel.
140 **/
txgbe_request_msix_irqs(struct wx * wx)141 static int txgbe_request_msix_irqs(struct wx *wx)
142 {
143 struct net_device *netdev = wx->netdev;
144 int vector, err;
145
146 for (vector = 0; vector < wx->num_q_vectors; vector++) {
147 struct wx_q_vector *q_vector = wx->q_vector[vector];
148 struct msix_entry *entry = &wx->msix_q_entries[vector];
149
150 if (q_vector->tx.ring && q_vector->rx.ring)
151 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
152 "%s-TxRx-%d", netdev->name, entry->entry);
153 else
154 /* skip this unused q_vector */
155 continue;
156
157 err = request_irq(entry->vector, wx_msix_clean_rings, 0,
158 q_vector->name, q_vector);
159 if (err) {
160 wx_err(wx, "request_irq failed for MSIX interrupt %s Error: %d\n",
161 q_vector->name, err);
162 goto free_queue_irqs;
163 }
164 }
165
166 return 0;
167
168 free_queue_irqs:
169 while (vector) {
170 vector--;
171 free_irq(wx->msix_q_entries[vector].vector,
172 wx->q_vector[vector]);
173 }
174 wx_reset_interrupt_capability(wx);
175 return err;
176 }
177
178 /**
179 * txgbe_request_irq - initialize interrupts
180 * @wx: board private structure
181 *
182 * Attempt to configure interrupts using the best available
183 * capabilities of the hardware and kernel.
184 **/
txgbe_request_irq(struct wx * wx)185 static int txgbe_request_irq(struct wx *wx)
186 {
187 struct net_device *netdev = wx->netdev;
188 struct pci_dev *pdev = wx->pdev;
189 int err;
190
191 if (pdev->msix_enabled)
192 err = txgbe_request_msix_irqs(wx);
193 else if (pdev->msi_enabled)
194 err = request_irq(wx->pdev->irq, &txgbe_intr, 0,
195 netdev->name, wx);
196 else
197 err = request_irq(wx->pdev->irq, &txgbe_intr, IRQF_SHARED,
198 netdev->name, wx);
199
200 if (err)
201 wx_err(wx, "request_irq failed, Error %d\n", err);
202
203 return err;
204 }
205
txgbe_up_complete(struct wx * wx)206 static void txgbe_up_complete(struct wx *wx)
207 {
208 struct net_device *netdev = wx->netdev;
209
210 wx_control_hw(wx, true);
211 wx_configure_vectors(wx);
212
213 /* make sure to complete pre-operations */
214 smp_mb__before_atomic();
215 wx_napi_enable_all(wx);
216
217 phylink_start(wx->phylink);
218
219 /* clear any pending interrupts, may auto mask */
220 rd32(wx, WX_PX_IC(0));
221 rd32(wx, WX_PX_IC(1));
222 rd32(wx, WX_PX_MISC_IC);
223 txgbe_irq_enable(wx, true);
224
225 /* enable transmits */
226 netif_tx_start_all_queues(netdev);
227 }
228
txgbe_reset(struct wx * wx)229 static void txgbe_reset(struct wx *wx)
230 {
231 struct net_device *netdev = wx->netdev;
232 u8 old_addr[ETH_ALEN];
233 int err;
234
235 err = txgbe_reset_hw(wx);
236 if (err != 0)
237 wx_err(wx, "Hardware Error: %d\n", err);
238
239 wx_start_hw(wx);
240 /* do not flush user set addresses */
241 memcpy(old_addr, &wx->mac_table[0].addr, netdev->addr_len);
242 wx_flush_sw_mac_table(wx);
243 wx_mac_set_default_filter(wx, old_addr);
244 }
245
txgbe_disable_device(struct wx * wx)246 static void txgbe_disable_device(struct wx *wx)
247 {
248 struct net_device *netdev = wx->netdev;
249 u32 i;
250
251 wx_disable_pcie_master(wx);
252 /* disable receives */
253 wx_disable_rx(wx);
254
255 /* disable all enabled rx queues */
256 for (i = 0; i < wx->num_rx_queues; i++)
257 /* this call also flushes the previous write */
258 wx_disable_rx_queue(wx, wx->rx_ring[i]);
259
260 netif_tx_stop_all_queues(netdev);
261 netif_tx_disable(netdev);
262
263 wx_irq_disable(wx);
264 wx_napi_disable_all(wx);
265
266 if (wx->bus.func < 2)
267 wr32m(wx, TXGBE_MIS_PRB_CTL, TXGBE_MIS_PRB_CTL_LAN_UP(wx->bus.func), 0);
268 else
269 wx_err(wx, "%s: invalid bus lan id %d\n",
270 __func__, wx->bus.func);
271
272 if (!(((wx->subsystem_device_id & WX_NCSI_MASK) == WX_NCSI_SUP) ||
273 ((wx->subsystem_device_id & WX_WOL_MASK) == WX_WOL_SUP))) {
274 /* disable mac transmiter */
275 wr32m(wx, WX_MAC_TX_CFG, WX_MAC_TX_CFG_TE, 0);
276 }
277
278 /* disable transmits in the hardware now that interrupts are off */
279 for (i = 0; i < wx->num_tx_queues; i++) {
280 u8 reg_idx = wx->tx_ring[i]->reg_idx;
281
282 wr32(wx, WX_PX_TR_CFG(reg_idx), WX_PX_TR_CFG_SWFLSH);
283 }
284
285 /* Disable the Tx DMA engine */
286 wr32m(wx, WX_TDM_CTL, WX_TDM_CTL_TE, 0);
287
288 wx_update_stats(wx);
289 }
290
txgbe_down(struct wx * wx)291 void txgbe_down(struct wx *wx)
292 {
293 txgbe_disable_device(wx);
294 txgbe_reset(wx);
295 phylink_stop(wx->phylink);
296
297 wx_clean_all_tx_rings(wx);
298 wx_clean_all_rx_rings(wx);
299 }
300
txgbe_up(struct wx * wx)301 void txgbe_up(struct wx *wx)
302 {
303 wx_configure(wx);
304 txgbe_up_complete(wx);
305 }
306
307 /**
308 * txgbe_init_type_code - Initialize the shared code
309 * @wx: pointer to hardware structure
310 **/
txgbe_init_type_code(struct wx * wx)311 static void txgbe_init_type_code(struct wx *wx)
312 {
313 u8 device_type = wx->subsystem_device_id & 0xF0;
314
315 switch (wx->device_id) {
316 case TXGBE_DEV_ID_SP1000:
317 case TXGBE_DEV_ID_WX1820:
318 wx->mac.type = wx_mac_sp;
319 break;
320 default:
321 wx->mac.type = wx_mac_unknown;
322 break;
323 }
324
325 switch (device_type) {
326 case TXGBE_ID_SFP:
327 wx->media_type = sp_media_fiber;
328 break;
329 case TXGBE_ID_XAUI:
330 case TXGBE_ID_SGMII:
331 wx->media_type = sp_media_copper;
332 break;
333 case TXGBE_ID_KR_KX_KX4:
334 case TXGBE_ID_MAC_XAUI:
335 case TXGBE_ID_MAC_SGMII:
336 wx->media_type = sp_media_backplane;
337 break;
338 case TXGBE_ID_SFI_XAUI:
339 if (wx->bus.func == 0)
340 wx->media_type = sp_media_fiber;
341 else
342 wx->media_type = sp_media_copper;
343 break;
344 default:
345 wx->media_type = sp_media_unknown;
346 break;
347 }
348 }
349
350 /**
351 * txgbe_sw_init - Initialize general software structures (struct wx)
352 * @wx: board private structure to initialize
353 **/
txgbe_sw_init(struct wx * wx)354 static int txgbe_sw_init(struct wx *wx)
355 {
356 u16 msix_count = 0;
357 int err;
358
359 wx->mac.num_rar_entries = TXGBE_SP_RAR_ENTRIES;
360 wx->mac.max_tx_queues = TXGBE_SP_MAX_TX_QUEUES;
361 wx->mac.max_rx_queues = TXGBE_SP_MAX_RX_QUEUES;
362 wx->mac.mcft_size = TXGBE_SP_MC_TBL_SIZE;
363 wx->mac.vft_size = TXGBE_SP_VFT_TBL_SIZE;
364 wx->mac.rx_pb_size = TXGBE_SP_RX_PB_SIZE;
365 wx->mac.tx_pb_size = TXGBE_SP_TDB_PB_SZ;
366
367 /* PCI config space info */
368 err = wx_sw_init(wx);
369 if (err < 0)
370 return err;
371
372 txgbe_init_type_code(wx);
373
374 /* Set common capability flags and settings */
375 wx->max_q_vectors = TXGBE_MAX_MSIX_VECTORS;
376 err = wx_get_pcie_msix_counts(wx, &msix_count, TXGBE_MAX_MSIX_VECTORS);
377 if (err)
378 wx_err(wx, "Do not support MSI-X\n");
379 wx->mac.max_msix_vectors = msix_count;
380
381 wx->ring_feature[RING_F_RSS].limit = min_t(int, TXGBE_MAX_RSS_INDICES,
382 num_online_cpus());
383 wx->rss_enabled = true;
384
385 /* enable itr by default in dynamic mode */
386 wx->rx_itr_setting = 1;
387 wx->tx_itr_setting = 1;
388
389 /* set default ring sizes */
390 wx->tx_ring_count = TXGBE_DEFAULT_TXD;
391 wx->rx_ring_count = TXGBE_DEFAULT_RXD;
392
393 /* set default work limits */
394 wx->tx_work_limit = TXGBE_DEFAULT_TX_WORK;
395 wx->rx_work_limit = TXGBE_DEFAULT_RX_WORK;
396
397 return 0;
398 }
399
400 /**
401 * txgbe_open - Called when a network interface is made active
402 * @netdev: network interface device structure
403 *
404 * Returns 0 on success, negative value on failure
405 *
406 * The open entry point is called when a network interface is made
407 * active by the system (IFF_UP).
408 **/
txgbe_open(struct net_device * netdev)409 static int txgbe_open(struct net_device *netdev)
410 {
411 struct wx *wx = netdev_priv(netdev);
412 int err;
413
414 err = wx_setup_resources(wx);
415 if (err)
416 goto err_reset;
417
418 wx_configure(wx);
419
420 err = txgbe_request_irq(wx);
421 if (err)
422 goto err_free_isb;
423
424 /* Notify the stack of the actual queue counts. */
425 err = netif_set_real_num_tx_queues(netdev, wx->num_tx_queues);
426 if (err)
427 goto err_free_irq;
428
429 err = netif_set_real_num_rx_queues(netdev, wx->num_rx_queues);
430 if (err)
431 goto err_free_irq;
432
433 txgbe_up_complete(wx);
434
435 return 0;
436
437 err_free_irq:
438 wx_free_irq(wx);
439 err_free_isb:
440 wx_free_isb_resources(wx);
441 err_reset:
442 txgbe_reset(wx);
443
444 return err;
445 }
446
447 /**
448 * txgbe_close_suspend - actions necessary to both suspend and close flows
449 * @wx: the private wx struct
450 *
451 * This function should contain the necessary work common to both suspending
452 * and closing of the device.
453 */
txgbe_close_suspend(struct wx * wx)454 static void txgbe_close_suspend(struct wx *wx)
455 {
456 txgbe_disable_device(wx);
457 wx_free_resources(wx);
458 }
459
460 /**
461 * txgbe_close - Disables a network interface
462 * @netdev: network interface device structure
463 *
464 * Returns 0, this is not allowed to fail
465 *
466 * The close entry point is called when an interface is de-activated
467 * by the OS. The hardware is still under the drivers control, but
468 * needs to be disabled. A global MAC reset is issued to stop the
469 * hardware, and all transmit and receive resources are freed.
470 **/
txgbe_close(struct net_device * netdev)471 static int txgbe_close(struct net_device *netdev)
472 {
473 struct wx *wx = netdev_priv(netdev);
474
475 txgbe_down(wx);
476 wx_free_irq(wx);
477 wx_free_resources(wx);
478 wx_control_hw(wx, false);
479
480 return 0;
481 }
482
txgbe_dev_shutdown(struct pci_dev * pdev)483 static void txgbe_dev_shutdown(struct pci_dev *pdev)
484 {
485 struct wx *wx = pci_get_drvdata(pdev);
486 struct net_device *netdev;
487
488 netdev = wx->netdev;
489 netif_device_detach(netdev);
490
491 rtnl_lock();
492 if (netif_running(netdev))
493 txgbe_close_suspend(wx);
494 rtnl_unlock();
495
496 wx_control_hw(wx, false);
497
498 pci_disable_device(pdev);
499 }
500
txgbe_shutdown(struct pci_dev * pdev)501 static void txgbe_shutdown(struct pci_dev *pdev)
502 {
503 txgbe_dev_shutdown(pdev);
504
505 if (system_state == SYSTEM_POWER_OFF) {
506 pci_wake_from_d3(pdev, false);
507 pci_set_power_state(pdev, PCI_D3hot);
508 }
509 }
510
511 /**
512 * txgbe_setup_tc - routine to configure net_device for multiple traffic
513 * classes.
514 *
515 * @dev: net device to configure
516 * @tc: number of traffic classes to enable
517 */
txgbe_setup_tc(struct net_device * dev,u8 tc)518 int txgbe_setup_tc(struct net_device *dev, u8 tc)
519 {
520 struct wx *wx = netdev_priv(dev);
521
522 /* Hardware has to reinitialize queues and interrupts to
523 * match packet buffer alignment. Unfortunately, the
524 * hardware is not flexible enough to do this dynamically.
525 */
526 if (netif_running(dev))
527 txgbe_close(dev);
528 else
529 txgbe_reset(wx);
530
531 wx_clear_interrupt_scheme(wx);
532
533 if (tc)
534 netdev_set_num_tc(dev, tc);
535 else
536 netdev_reset_tc(dev);
537
538 wx_init_interrupt_scheme(wx);
539
540 if (netif_running(dev))
541 txgbe_open(dev);
542
543 return 0;
544 }
545
546 static const struct net_device_ops txgbe_netdev_ops = {
547 .ndo_open = txgbe_open,
548 .ndo_stop = txgbe_close,
549 .ndo_change_mtu = wx_change_mtu,
550 .ndo_start_xmit = wx_xmit_frame,
551 .ndo_set_rx_mode = wx_set_rx_mode,
552 .ndo_set_features = wx_set_features,
553 .ndo_validate_addr = eth_validate_addr,
554 .ndo_set_mac_address = wx_set_mac,
555 .ndo_get_stats64 = wx_get_stats64,
556 .ndo_vlan_rx_add_vid = wx_vlan_rx_add_vid,
557 .ndo_vlan_rx_kill_vid = wx_vlan_rx_kill_vid,
558 };
559
560 /**
561 * txgbe_probe - Device Initialization Routine
562 * @pdev: PCI device information struct
563 * @ent: entry in txgbe_pci_tbl
564 *
565 * Returns 0 on success, negative on failure
566 *
567 * txgbe_probe initializes an adapter identified by a pci_dev structure.
568 * The OS initialization, configuring of the wx private structure,
569 * and a hardware reset occur.
570 **/
txgbe_probe(struct pci_dev * pdev,const struct pci_device_id __always_unused * ent)571 static int txgbe_probe(struct pci_dev *pdev,
572 const struct pci_device_id __always_unused *ent)
573 {
574 struct net_device *netdev;
575 int err, expected_gts;
576 struct wx *wx = NULL;
577 struct txgbe *txgbe;
578
579 u16 eeprom_verh = 0, eeprom_verl = 0, offset = 0;
580 u16 eeprom_cfg_blkh = 0, eeprom_cfg_blkl = 0;
581 u16 build = 0, major = 0, patch = 0;
582 u32 etrack_id = 0;
583
584 err = pci_enable_device_mem(pdev);
585 if (err)
586 return err;
587
588 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
589 if (err) {
590 dev_err(&pdev->dev,
591 "No usable DMA configuration, aborting\n");
592 goto err_pci_disable_dev;
593 }
594
595 err = pci_request_selected_regions(pdev,
596 pci_select_bars(pdev, IORESOURCE_MEM),
597 txgbe_driver_name);
598 if (err) {
599 dev_err(&pdev->dev,
600 "pci_request_selected_regions failed 0x%x\n", err);
601 goto err_pci_disable_dev;
602 }
603
604 pci_set_master(pdev);
605
606 netdev = devm_alloc_etherdev_mqs(&pdev->dev,
607 sizeof(struct wx),
608 TXGBE_MAX_TX_QUEUES,
609 TXGBE_MAX_RX_QUEUES);
610 if (!netdev) {
611 err = -ENOMEM;
612 goto err_pci_release_regions;
613 }
614
615 SET_NETDEV_DEV(netdev, &pdev->dev);
616
617 wx = netdev_priv(netdev);
618 wx->netdev = netdev;
619 wx->pdev = pdev;
620
621 wx->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
622
623 wx->hw_addr = devm_ioremap(&pdev->dev,
624 pci_resource_start(pdev, 0),
625 pci_resource_len(pdev, 0));
626 if (!wx->hw_addr) {
627 err = -EIO;
628 goto err_pci_release_regions;
629 }
630
631 wx->driver_name = txgbe_driver_name;
632 txgbe_set_ethtool_ops(netdev);
633 netdev->netdev_ops = &txgbe_netdev_ops;
634
635 /* setup the private structure */
636 err = txgbe_sw_init(wx);
637 if (err)
638 goto err_free_mac_table;
639
640 /* check if flash load is done after hw power up */
641 err = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_PERST);
642 if (err)
643 goto err_free_mac_table;
644 err = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_PWRRST);
645 if (err)
646 goto err_free_mac_table;
647
648 err = wx_mng_present(wx);
649 if (err) {
650 dev_err(&pdev->dev, "Management capability is not present\n");
651 goto err_free_mac_table;
652 }
653
654 err = txgbe_reset_hw(wx);
655 if (err) {
656 dev_err(&pdev->dev, "HW Init failed: %d\n", err);
657 goto err_free_mac_table;
658 }
659
660 netdev->features = NETIF_F_SG |
661 NETIF_F_TSO |
662 NETIF_F_TSO6 |
663 NETIF_F_RXHASH |
664 NETIF_F_RXCSUM |
665 NETIF_F_HW_CSUM;
666
667 netdev->gso_partial_features = NETIF_F_GSO_ENCAP_ALL;
668 netdev->features |= netdev->gso_partial_features;
669 netdev->features |= NETIF_F_SCTP_CRC;
670 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
671 netdev->hw_enc_features |= netdev->vlan_features;
672 netdev->features |= NETIF_F_VLAN_FEATURES;
673 /* copy netdev features into list of user selectable features */
674 netdev->hw_features |= netdev->features | NETIF_F_RXALL;
675 netdev->hw_features |= NETIF_F_NTUPLE | NETIF_F_HW_TC;
676 netdev->features |= NETIF_F_HIGHDMA;
677 netdev->hw_features |= NETIF_F_GRO;
678 netdev->features |= NETIF_F_GRO;
679
680 netdev->priv_flags |= IFF_UNICAST_FLT;
681 netdev->priv_flags |= IFF_SUPP_NOFCS;
682 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
683
684 netdev->min_mtu = ETH_MIN_MTU;
685 netdev->max_mtu = WX_MAX_JUMBO_FRAME_SIZE -
686 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
687
688 /* make sure the EEPROM is good */
689 err = txgbe_validate_eeprom_checksum(wx, NULL);
690 if (err != 0) {
691 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
692 wr32(wx, WX_MIS_RST, WX_MIS_RST_SW_RST);
693 err = -EIO;
694 goto err_free_mac_table;
695 }
696
697 eth_hw_addr_set(netdev, wx->mac.perm_addr);
698 wx_mac_set_default_filter(wx, wx->mac.perm_addr);
699
700 err = wx_init_interrupt_scheme(wx);
701 if (err)
702 goto err_free_mac_table;
703
704 /* Save off EEPROM version number and Option Rom version which
705 * together make a unique identify for the eeprom
706 */
707 wx_read_ee_hostif(wx,
708 wx->eeprom.sw_region_offset + TXGBE_EEPROM_VERSION_H,
709 &eeprom_verh);
710 wx_read_ee_hostif(wx,
711 wx->eeprom.sw_region_offset + TXGBE_EEPROM_VERSION_L,
712 &eeprom_verl);
713 etrack_id = (eeprom_verh << 16) | eeprom_verl;
714
715 wx_read_ee_hostif(wx,
716 wx->eeprom.sw_region_offset + TXGBE_ISCSI_BOOT_CONFIG,
717 &offset);
718
719 /* Make sure offset to SCSI block is valid */
720 if (!(offset == 0x0) && !(offset == 0xffff)) {
721 wx_read_ee_hostif(wx, offset + 0x84, &eeprom_cfg_blkh);
722 wx_read_ee_hostif(wx, offset + 0x83, &eeprom_cfg_blkl);
723
724 /* Only display Option Rom if exist */
725 if (eeprom_cfg_blkl && eeprom_cfg_blkh) {
726 major = eeprom_cfg_blkl >> 8;
727 build = (eeprom_cfg_blkl << 8) | (eeprom_cfg_blkh >> 8);
728 patch = eeprom_cfg_blkh & 0x00ff;
729
730 snprintf(wx->eeprom_id, sizeof(wx->eeprom_id),
731 "0x%08x, %d.%d.%d", etrack_id, major, build,
732 patch);
733 } else {
734 snprintf(wx->eeprom_id, sizeof(wx->eeprom_id),
735 "0x%08x", etrack_id);
736 }
737 } else {
738 snprintf(wx->eeprom_id, sizeof(wx->eeprom_id),
739 "0x%08x", etrack_id);
740 }
741
742 if (etrack_id < 0x20010)
743 dev_warn(&pdev->dev, "Please upgrade the firmware to 0x20010 or above.\n");
744
745 txgbe = devm_kzalloc(&pdev->dev, sizeof(*txgbe), GFP_KERNEL);
746 if (!txgbe) {
747 err = -ENOMEM;
748 goto err_release_hw;
749 }
750
751 txgbe->wx = wx;
752 wx->priv = txgbe;
753
754 err = txgbe_init_phy(txgbe);
755 if (err)
756 goto err_release_hw;
757
758 err = register_netdev(netdev);
759 if (err)
760 goto err_remove_phy;
761
762 pci_set_drvdata(pdev, wx);
763
764 netif_tx_stop_all_queues(netdev);
765
766 /* calculate the expected PCIe bandwidth required for optimal
767 * performance. Note that some older parts will never have enough
768 * bandwidth due to being older generation PCIe parts. We clamp these
769 * parts to ensure that no warning is displayed, as this could confuse
770 * users otherwise.
771 */
772 expected_gts = txgbe_enumerate_functions(wx) * 10;
773
774 /* don't check link if we failed to enumerate functions */
775 if (expected_gts > 0)
776 txgbe_check_minimum_link(wx);
777 else
778 dev_warn(&pdev->dev, "Failed to enumerate PF devices.\n");
779
780 return 0;
781
782 err_remove_phy:
783 txgbe_remove_phy(txgbe);
784 err_release_hw:
785 wx_clear_interrupt_scheme(wx);
786 wx_control_hw(wx, false);
787 err_free_mac_table:
788 kfree(wx->mac_table);
789 err_pci_release_regions:
790 pci_release_selected_regions(pdev,
791 pci_select_bars(pdev, IORESOURCE_MEM));
792 err_pci_disable_dev:
793 pci_disable_device(pdev);
794 return err;
795 }
796
797 /**
798 * txgbe_remove - Device Removal Routine
799 * @pdev: PCI device information struct
800 *
801 * txgbe_remove is called by the PCI subsystem to alert the driver
802 * that it should release a PCI device. The could be caused by a
803 * Hot-Plug event, or because the driver is going to be removed from
804 * memory.
805 **/
txgbe_remove(struct pci_dev * pdev)806 static void txgbe_remove(struct pci_dev *pdev)
807 {
808 struct wx *wx = pci_get_drvdata(pdev);
809 struct txgbe *txgbe = wx->priv;
810 struct net_device *netdev;
811
812 netdev = wx->netdev;
813 unregister_netdev(netdev);
814
815 txgbe_remove_phy(txgbe);
816
817 pci_release_selected_regions(pdev,
818 pci_select_bars(pdev, IORESOURCE_MEM));
819
820 kfree(wx->rss_key);
821 kfree(wx->mac_table);
822 wx_clear_interrupt_scheme(wx);
823
824 pci_disable_device(pdev);
825 }
826
827 static struct pci_driver txgbe_driver = {
828 .name = txgbe_driver_name,
829 .id_table = txgbe_pci_tbl,
830 .probe = txgbe_probe,
831 .remove = txgbe_remove,
832 .shutdown = txgbe_shutdown,
833 };
834
835 module_pci_driver(txgbe_driver);
836
837 MODULE_DEVICE_TABLE(pci, txgbe_pci_tbl);
838 MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@trustnetic.com>");
839 MODULE_DESCRIPTION("WangXun(R) 10 Gigabit PCI Express Network Driver");
840 MODULE_LICENSE("GPL");
841