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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * FUJITSU Extended Socket Network Device driver
4 * Copyright (c) 2015 FUJITSU LIMITED
5 */
6
7#include <linux/module.h>
8#include <linux/types.h>
9#include <linux/nls.h>
10#include <linux/platform_device.h>
11#include <linux/netdevice.h>
12#include <linux/interrupt.h>
13
14#include "fjes.h"
15#include "fjes_trace.h"
16
17#define MAJ 1
18#define MIN 2
19#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
20#define DRV_NAME "fjes"
21char fjes_driver_name[] = DRV_NAME;
22char fjes_driver_version[] = DRV_VERSION;
23static const char fjes_driver_string[] =
24 "FUJITSU Extended Socket Network Device Driver";
25static const char fjes_copyright[] =
26 "Copyright (c) 2015 FUJITSU LIMITED";
27
28MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
29MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
30MODULE_LICENSE("GPL");
31MODULE_VERSION(DRV_VERSION);
32
33#define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02"
34
35static const struct acpi_device_id fjes_acpi_ids[] = {
36 {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
37 {"", 0},
38};
39MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
40
41static bool is_extended_socket_device(struct acpi_device *device)
42{
43 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
44 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
45 union acpi_object *str;
46 acpi_status status;
47 int result;
48
49 status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
50 if (ACPI_FAILURE(status))
51 return false;
52
53 str = buffer.pointer;
54 result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
55 str->string.length, UTF16_LITTLE_ENDIAN,
56 str_buf, sizeof(str_buf) - 1);
57 str_buf[result] = 0;
58
59 if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
60 kfree(buffer.pointer);
61 return false;
62 }
63 kfree(buffer.pointer);
64
65 return true;
66}
67
68static int acpi_check_extended_socket_status(struct acpi_device *device)
69{
70 unsigned long long sta;
71 acpi_status status;
72
73 status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
74 if (ACPI_FAILURE(status))
75 return -ENODEV;
76
77 if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
78 (sta & ACPI_STA_DEVICE_ENABLED) &&
79 (sta & ACPI_STA_DEVICE_UI) &&
80 (sta & ACPI_STA_DEVICE_FUNCTIONING)))
81 return -ENODEV;
82
83 return 0;
84}
85
86static acpi_status
87fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
88{
89 struct acpi_resource_address32 *addr;
90 struct acpi_resource_irq *irq;
91 struct resource *res = data;
92
93 switch (acpi_res->type) {
94 case ACPI_RESOURCE_TYPE_ADDRESS32:
95 addr = &acpi_res->data.address32;
96 res[0].start = addr->address.minimum;
97 res[0].end = addr->address.minimum +
98 addr->address.address_length - 1;
99 break;
100
101 case ACPI_RESOURCE_TYPE_IRQ:
102 irq = &acpi_res->data.irq;
103 if (irq->interrupt_count != 1)
104 return AE_ERROR;
105 res[1].start = irq->interrupts[0];
106 res[1].end = irq->interrupts[0];
107 break;
108
109 default:
110 break;
111 }
112
113 return AE_OK;
114}
115
116static struct resource fjes_resource[] = {
117 DEFINE_RES_MEM(0, 1),
118 DEFINE_RES_IRQ(0)
119};
120
121static int fjes_acpi_add(struct acpi_device *device)
122{
123 struct platform_device *plat_dev;
124 acpi_status status;
125
126 if (!is_extended_socket_device(device))
127 return -ENODEV;
128
129 if (acpi_check_extended_socket_status(device))
130 return -ENODEV;
131
132 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
133 fjes_get_acpi_resource, fjes_resource);
134 if (ACPI_FAILURE(status))
135 return -ENODEV;
136
137 /* create platform_device */
138 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
139 ARRAY_SIZE(fjes_resource));
140 if (IS_ERR(plat_dev))
141 return PTR_ERR(plat_dev);
142
143 device->driver_data = plat_dev;
144
145 return 0;
146}
147
148static void fjes_acpi_remove(struct acpi_device *device)
149{
150 struct platform_device *plat_dev;
151
152 plat_dev = (struct platform_device *)acpi_driver_data(device);
153 platform_device_unregister(plat_dev);
154}
155
156static struct acpi_driver fjes_acpi_driver = {
157 .name = DRV_NAME,
158 .class = DRV_NAME,
159 .owner = THIS_MODULE,
160 .ids = fjes_acpi_ids,
161 .ops = {
162 .add = fjes_acpi_add,
163 .remove = fjes_acpi_remove,
164 },
165};
166
167static int fjes_setup_resources(struct fjes_adapter *adapter)
168{
169 struct net_device *netdev = adapter->netdev;
170 struct ep_share_mem_info *buf_pair;
171 struct fjes_hw *hw = &adapter->hw;
172 unsigned long flags;
173 int result;
174 int epidx;
175
176 mutex_lock(&hw->hw_info.lock);
177 result = fjes_hw_request_info(hw);
178 switch (result) {
179 case 0:
180 for (epidx = 0; epidx < hw->max_epid; epidx++) {
181 hw->ep_shm_info[epidx].es_status =
182 hw->hw_info.res_buf->info.info[epidx].es_status;
183 hw->ep_shm_info[epidx].zone =
184 hw->hw_info.res_buf->info.info[epidx].zone;
185 }
186 break;
187 default:
188 case -ENOMSG:
189 case -EBUSY:
190 adapter->force_reset = true;
191
192 mutex_unlock(&hw->hw_info.lock);
193 return result;
194 }
195 mutex_unlock(&hw->hw_info.lock);
196
197 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
198 if ((epidx != hw->my_epid) &&
199 (hw->ep_shm_info[epidx].es_status ==
200 FJES_ZONING_STATUS_ENABLE)) {
201 fjes_hw_raise_interrupt(hw, epidx,
202 REG_ICTL_MASK_INFO_UPDATE);
203 hw->ep_shm_info[epidx].ep_stats
204 .send_intr_zoneupdate += 1;
205 }
206 }
207
208 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
209
210 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
211 if (epidx == hw->my_epid)
212 continue;
213
214 buf_pair = &hw->ep_shm_info[epidx];
215
216 spin_lock_irqsave(&hw->rx_status_lock, flags);
217 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
218 netdev->mtu);
219 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
220
221 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
222 mutex_lock(&hw->hw_info.lock);
223 result =
224 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
225 mutex_unlock(&hw->hw_info.lock);
226
227 switch (result) {
228 case 0:
229 break;
230 case -ENOMSG:
231 case -EBUSY:
232 default:
233 adapter->force_reset = true;
234 return result;
235 }
236
237 hw->ep_shm_info[epidx].ep_stats
238 .com_regist_buf_exec += 1;
239 }
240 }
241
242 return 0;
243}
244
245static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
246{
247 struct fjes_hw *hw = &adapter->hw;
248
249 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
250
251 adapter->unset_rx_last = true;
252 napi_schedule(&adapter->napi);
253}
254
255static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
256{
257 struct fjes_hw *hw = &adapter->hw;
258 enum ep_partner_status status;
259 unsigned long flags;
260
261 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
262
263 status = fjes_hw_get_partner_ep_status(hw, src_epid);
264 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
265 switch (status) {
266 case EP_PARTNER_WAITING:
267 spin_lock_irqsave(&hw->rx_status_lock, flags);
268 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
269 FJES_RX_STOP_REQ_DONE;
270 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
271 clear_bit(src_epid, &hw->txrx_stop_req_bit);
272 fallthrough;
273 case EP_PARTNER_UNSHARE:
274 case EP_PARTNER_COMPLETE:
275 default:
276 set_bit(src_epid, &adapter->unshare_watch_bitmask);
277 if (!work_pending(&adapter->unshare_watch_task))
278 queue_work(adapter->control_wq,
279 &adapter->unshare_watch_task);
280 break;
281 case EP_PARTNER_SHARED:
282 set_bit(src_epid, &hw->epstop_req_bit);
283
284 if (!work_pending(&hw->epstop_task))
285 queue_work(adapter->control_wq, &hw->epstop_task);
286 break;
287 }
288 trace_fjes_stop_req_irq_post(hw, src_epid);
289}
290
291static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
292 int src_epid)
293{
294 struct fjes_hw *hw = &adapter->hw;
295 enum ep_partner_status status;
296 unsigned long flags;
297
298 status = fjes_hw_get_partner_ep_status(hw, src_epid);
299 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
300 switch (status) {
301 case EP_PARTNER_UNSHARE:
302 case EP_PARTNER_COMPLETE:
303 default:
304 break;
305 case EP_PARTNER_WAITING:
306 if (src_epid < hw->my_epid) {
307 spin_lock_irqsave(&hw->rx_status_lock, flags);
308 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
309 FJES_RX_STOP_REQ_DONE;
310 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
311
312 clear_bit(src_epid, &hw->txrx_stop_req_bit);
313 set_bit(src_epid, &adapter->unshare_watch_bitmask);
314
315 if (!work_pending(&adapter->unshare_watch_task))
316 queue_work(adapter->control_wq,
317 &adapter->unshare_watch_task);
318 }
319 break;
320 case EP_PARTNER_SHARED:
321 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
322 FJES_RX_STOP_REQ_REQUEST) {
323 set_bit(src_epid, &hw->epstop_req_bit);
324 if (!work_pending(&hw->epstop_task))
325 queue_work(adapter->control_wq,
326 &hw->epstop_task);
327 }
328 break;
329 }
330 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
331}
332
333static void fjes_update_zone_irq(struct fjes_adapter *adapter,
334 int src_epid)
335{
336 struct fjes_hw *hw = &adapter->hw;
337
338 if (!work_pending(&hw->update_zone_task))
339 queue_work(adapter->control_wq, &hw->update_zone_task);
340}
341
342static irqreturn_t fjes_intr(int irq, void *data)
343{
344 struct fjes_adapter *adapter = data;
345 struct fjes_hw *hw = &adapter->hw;
346 irqreturn_t ret;
347 u32 icr;
348
349 icr = fjes_hw_capture_interrupt_status(hw);
350
351 if (icr & REG_IS_MASK_IS_ASSERT) {
352 if (icr & REG_ICTL_MASK_RX_DATA) {
353 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
354 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
355 .recv_intr_rx += 1;
356 }
357
358 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
359 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
360 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
361 .recv_intr_stop += 1;
362 }
363
364 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
365 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
366 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
367 .recv_intr_unshare += 1;
368 }
369
370 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
371 fjes_hw_set_irqmask(hw,
372 REG_ICTL_MASK_TXRX_STOP_DONE, true);
373
374 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
375 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
376 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
377 .recv_intr_zoneupdate += 1;
378 }
379
380 ret = IRQ_HANDLED;
381 } else {
382 ret = IRQ_NONE;
383 }
384
385 return ret;
386}
387
388static int fjes_request_irq(struct fjes_adapter *adapter)
389{
390 struct net_device *netdev = adapter->netdev;
391 int result = -1;
392
393 adapter->interrupt_watch_enable = true;
394 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
395 queue_delayed_work(adapter->control_wq,
396 &adapter->interrupt_watch_task,
397 FJES_IRQ_WATCH_DELAY);
398 }
399
400 if (!adapter->irq_registered) {
401 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
402 IRQF_SHARED, netdev->name, adapter);
403 if (result)
404 adapter->irq_registered = false;
405 else
406 adapter->irq_registered = true;
407 }
408
409 return result;
410}
411
412static void fjes_free_irq(struct fjes_adapter *adapter)
413{
414 struct fjes_hw *hw = &adapter->hw;
415
416 adapter->interrupt_watch_enable = false;
417 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
418
419 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
420
421 if (adapter->irq_registered) {
422 free_irq(adapter->hw.hw_res.irq, adapter);
423 adapter->irq_registered = false;
424 }
425}
426
427static void fjes_free_resources(struct fjes_adapter *adapter)
428{
429 struct net_device *netdev = adapter->netdev;
430 struct fjes_device_command_param param;
431 struct ep_share_mem_info *buf_pair;
432 struct fjes_hw *hw = &adapter->hw;
433 bool reset_flag = false;
434 unsigned long flags;
435 int result;
436 int epidx;
437
438 for (epidx = 0; epidx < hw->max_epid; epidx++) {
439 if (epidx == hw->my_epid)
440 continue;
441
442 mutex_lock(&hw->hw_info.lock);
443 result = fjes_hw_unregister_buff_addr(hw, epidx);
444 mutex_unlock(&hw->hw_info.lock);
445
446 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
447
448 if (result)
449 reset_flag = true;
450
451 buf_pair = &hw->ep_shm_info[epidx];
452
453 spin_lock_irqsave(&hw->rx_status_lock, flags);
454 fjes_hw_setup_epbuf(&buf_pair->tx,
455 netdev->dev_addr, netdev->mtu);
456 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
457
458 clear_bit(epidx, &hw->txrx_stop_req_bit);
459 }
460
461 if (reset_flag || adapter->force_reset) {
462 result = fjes_hw_reset(hw);
463
464 adapter->force_reset = false;
465
466 if (result)
467 adapter->open_guard = true;
468
469 hw->hw_info.buffer_share_bit = 0;
470
471 memset((void *)¶m, 0, sizeof(param));
472
473 param.req_len = hw->hw_info.req_buf_size;
474 param.req_start = __pa(hw->hw_info.req_buf);
475 param.res_len = hw->hw_info.res_buf_size;
476 param.res_start = __pa(hw->hw_info.res_buf);
477 param.share_start = __pa(hw->hw_info.share->ep_status);
478
479 fjes_hw_init_command_registers(hw, ¶m);
480 }
481}
482
483/* fjes_open - Called when a network interface is made active */
484static int fjes_open(struct net_device *netdev)
485{
486 struct fjes_adapter *adapter = netdev_priv(netdev);
487 struct fjes_hw *hw = &adapter->hw;
488 int result;
489
490 if (adapter->open_guard)
491 return -ENXIO;
492
493 result = fjes_setup_resources(adapter);
494 if (result)
495 goto err_setup_res;
496
497 hw->txrx_stop_req_bit = 0;
498 hw->epstop_req_bit = 0;
499
500 napi_enable(&adapter->napi);
501
502 fjes_hw_capture_interrupt_status(hw);
503
504 result = fjes_request_irq(adapter);
505 if (result)
506 goto err_req_irq;
507
508 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
509
510 netif_tx_start_all_queues(netdev);
511 netif_carrier_on(netdev);
512
513 return 0;
514
515err_req_irq:
516 fjes_free_irq(adapter);
517 napi_disable(&adapter->napi);
518
519err_setup_res:
520 fjes_free_resources(adapter);
521 return result;
522}
523
524/* fjes_close - Disables a network interface */
525static int fjes_close(struct net_device *netdev)
526{
527 struct fjes_adapter *adapter = netdev_priv(netdev);
528 struct fjes_hw *hw = &adapter->hw;
529 unsigned long flags;
530 int epidx;
531
532 netif_tx_stop_all_queues(netdev);
533 netif_carrier_off(netdev);
534
535 fjes_hw_raise_epstop(hw);
536
537 napi_disable(&adapter->napi);
538
539 spin_lock_irqsave(&hw->rx_status_lock, flags);
540 for (epidx = 0; epidx < hw->max_epid; epidx++) {
541 if (epidx == hw->my_epid)
542 continue;
543
544 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
545 EP_PARTNER_SHARED)
546 adapter->hw.ep_shm_info[epidx]
547 .tx.info->v1i.rx_status &=
548 ~FJES_RX_POLL_WORK;
549 }
550 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
551
552 fjes_free_irq(adapter);
553
554 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
555 cancel_work_sync(&adapter->unshare_watch_task);
556 adapter->unshare_watch_bitmask = 0;
557 cancel_work_sync(&adapter->raise_intr_rxdata_task);
558 cancel_work_sync(&adapter->tx_stall_task);
559
560 cancel_work_sync(&hw->update_zone_task);
561 cancel_work_sync(&hw->epstop_task);
562
563 fjes_hw_wait_epstop(hw);
564
565 fjes_free_resources(adapter);
566
567 return 0;
568}
569
570static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
571 void *data, size_t len)
572{
573 int retval;
574
575 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
576 data, len);
577 if (retval)
578 return retval;
579
580 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
581 FJES_TX_DELAY_SEND_PENDING;
582 if (!work_pending(&adapter->raise_intr_rxdata_task))
583 queue_work(adapter->txrx_wq,
584 &adapter->raise_intr_rxdata_task);
585
586 retval = 0;
587 return retval;
588}
589
590static netdev_tx_t
591fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
592{
593 struct fjes_adapter *adapter = netdev_priv(netdev);
594 struct fjes_hw *hw = &adapter->hw;
595
596 int max_epid, my_epid, dest_epid;
597 enum ep_partner_status pstatus;
598 struct netdev_queue *cur_queue;
599 char shortpkt[VLAN_ETH_HLEN];
600 bool is_multi, vlan;
601 struct ethhdr *eth;
602 u16 queue_no = 0;
603 u16 vlan_id = 0;
604 netdev_tx_t ret;
605 char *data;
606 int len;
607
608 ret = NETDEV_TX_OK;
609 is_multi = false;
610 cur_queue = netdev_get_tx_queue(netdev, queue_no);
611
612 eth = (struct ethhdr *)skb->data;
613 my_epid = hw->my_epid;
614
615 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
616
617 data = skb->data;
618 len = skb->len;
619
620 if (is_multicast_ether_addr(eth->h_dest)) {
621 dest_epid = 0;
622 max_epid = hw->max_epid;
623 is_multi = true;
624 } else if (is_local_ether_addr(eth->h_dest)) {
625 dest_epid = eth->h_dest[ETH_ALEN - 1];
626 max_epid = dest_epid + 1;
627
628 if ((eth->h_dest[0] == 0x02) &&
629 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
630 eth->h_dest[3] | eth->h_dest[4])) &&
631 (dest_epid < hw->max_epid)) {
632 ;
633 } else {
634 dest_epid = 0;
635 max_epid = 0;
636 ret = NETDEV_TX_OK;
637
638 adapter->stats64.tx_packets += 1;
639 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
640 adapter->stats64.tx_bytes += len;
641 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
642 }
643 } else {
644 dest_epid = 0;
645 max_epid = 0;
646 ret = NETDEV_TX_OK;
647
648 adapter->stats64.tx_packets += 1;
649 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
650 adapter->stats64.tx_bytes += len;
651 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
652 }
653
654 for (; dest_epid < max_epid; dest_epid++) {
655 if (my_epid == dest_epid)
656 continue;
657
658 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
659 if (pstatus != EP_PARTNER_SHARED) {
660 if (!is_multi)
661 hw->ep_shm_info[dest_epid].ep_stats
662 .tx_dropped_not_shared += 1;
663 ret = NETDEV_TX_OK;
664 } else if (!fjes_hw_check_epbuf_version(
665 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
666 /* version is NOT 0 */
667 adapter->stats64.tx_carrier_errors += 1;
668 hw->ep_shm_info[dest_epid].net_stats
669 .tx_carrier_errors += 1;
670 hw->ep_shm_info[dest_epid].ep_stats
671 .tx_dropped_ver_mismatch += 1;
672
673 ret = NETDEV_TX_OK;
674 } else if (!fjes_hw_check_mtu(
675 &adapter->hw.ep_shm_info[dest_epid].rx,
676 netdev->mtu)) {
677 adapter->stats64.tx_dropped += 1;
678 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
679 adapter->stats64.tx_errors += 1;
680 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
681 hw->ep_shm_info[dest_epid].ep_stats
682 .tx_dropped_buf_size_mismatch += 1;
683
684 ret = NETDEV_TX_OK;
685 } else if (vlan &&
686 !fjes_hw_check_vlan_id(
687 &adapter->hw.ep_shm_info[dest_epid].rx,
688 vlan_id)) {
689 hw->ep_shm_info[dest_epid].ep_stats
690 .tx_dropped_vlanid_mismatch += 1;
691 ret = NETDEV_TX_OK;
692 } else {
693 if (len < VLAN_ETH_HLEN) {
694 memset(shortpkt, 0, VLAN_ETH_HLEN);
695 memcpy(shortpkt, skb->data, skb->len);
696 len = VLAN_ETH_HLEN;
697 data = shortpkt;
698 }
699
700 if (adapter->tx_retry_count == 0) {
701 adapter->tx_start_jiffies = jiffies;
702 adapter->tx_retry_count = 1;
703 } else {
704 adapter->tx_retry_count++;
705 }
706
707 if (fjes_tx_send(adapter, dest_epid, data, len)) {
708 if (is_multi) {
709 ret = NETDEV_TX_OK;
710 } else if (
711 ((long)jiffies -
712 (long)adapter->tx_start_jiffies) >=
713 FJES_TX_RETRY_TIMEOUT) {
714 adapter->stats64.tx_fifo_errors += 1;
715 hw->ep_shm_info[dest_epid].net_stats
716 .tx_fifo_errors += 1;
717 adapter->stats64.tx_errors += 1;
718 hw->ep_shm_info[dest_epid].net_stats
719 .tx_errors += 1;
720
721 ret = NETDEV_TX_OK;
722 } else {
723 netif_trans_update(netdev);
724 hw->ep_shm_info[dest_epid].ep_stats
725 .tx_buffer_full += 1;
726 netif_tx_stop_queue(cur_queue);
727
728 if (!work_pending(&adapter->tx_stall_task))
729 queue_work(adapter->txrx_wq,
730 &adapter->tx_stall_task);
731
732 ret = NETDEV_TX_BUSY;
733 }
734 } else {
735 if (!is_multi) {
736 adapter->stats64.tx_packets += 1;
737 hw->ep_shm_info[dest_epid].net_stats
738 .tx_packets += 1;
739 adapter->stats64.tx_bytes += len;
740 hw->ep_shm_info[dest_epid].net_stats
741 .tx_bytes += len;
742 }
743
744 adapter->tx_retry_count = 0;
745 ret = NETDEV_TX_OK;
746 }
747 }
748 }
749
750 if (ret == NETDEV_TX_OK) {
751 dev_kfree_skb(skb);
752 if (is_multi) {
753 adapter->stats64.tx_packets += 1;
754 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
755 adapter->stats64.tx_bytes += 1;
756 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
757 }
758 }
759
760 return ret;
761}
762
763static void
764fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
765{
766 struct fjes_adapter *adapter = netdev_priv(netdev);
767
768 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
769}
770
771static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
772{
773 struct fjes_adapter *adapter = netdev_priv(netdev);
774 bool running = netif_running(netdev);
775 struct fjes_hw *hw = &adapter->hw;
776 unsigned long flags;
777 int ret = -EINVAL;
778 int idx, epidx;
779
780 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
781 if (new_mtu <= fjes_support_mtu[idx]) {
782 new_mtu = fjes_support_mtu[idx];
783 if (new_mtu == netdev->mtu)
784 return 0;
785
786 ret = 0;
787 break;
788 }
789 }
790
791 if (ret)
792 return ret;
793
794 if (running) {
795 spin_lock_irqsave(&hw->rx_status_lock, flags);
796 for (epidx = 0; epidx < hw->max_epid; epidx++) {
797 if (epidx == hw->my_epid)
798 continue;
799 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
800 ~FJES_RX_MTU_CHANGING_DONE;
801 }
802 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
803
804 netif_tx_stop_all_queues(netdev);
805 netif_carrier_off(netdev);
806 cancel_work_sync(&adapter->tx_stall_task);
807 napi_disable(&adapter->napi);
808
809 msleep(1000);
810
811 netif_tx_stop_all_queues(netdev);
812 }
813
814 netdev->mtu = new_mtu;
815
816 if (running) {
817 for (epidx = 0; epidx < hw->max_epid; epidx++) {
818 if (epidx == hw->my_epid)
819 continue;
820
821 spin_lock_irqsave(&hw->rx_status_lock, flags);
822 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
823 netdev->dev_addr,
824 netdev->mtu);
825
826 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
827 FJES_RX_MTU_CHANGING_DONE;
828 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
829 }
830
831 netif_tx_wake_all_queues(netdev);
832 netif_carrier_on(netdev);
833 napi_enable(&adapter->napi);
834 napi_schedule(&adapter->napi);
835 }
836
837 return ret;
838}
839
840static void fjes_tx_retry(struct net_device *netdev, unsigned int txqueue)
841{
842 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
843
844 netif_tx_wake_queue(queue);
845}
846
847static int fjes_vlan_rx_add_vid(struct net_device *netdev,
848 __be16 proto, u16 vid)
849{
850 struct fjes_adapter *adapter = netdev_priv(netdev);
851 bool ret = true;
852 int epid;
853
854 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
855 if (epid == adapter->hw.my_epid)
856 continue;
857
858 if (!fjes_hw_check_vlan_id(
859 &adapter->hw.ep_shm_info[epid].tx, vid))
860 ret = fjes_hw_set_vlan_id(
861 &adapter->hw.ep_shm_info[epid].tx, vid);
862 }
863
864 return ret ? 0 : -ENOSPC;
865}
866
867static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
868 __be16 proto, u16 vid)
869{
870 struct fjes_adapter *adapter = netdev_priv(netdev);
871 int epid;
872
873 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
874 if (epid == adapter->hw.my_epid)
875 continue;
876
877 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
878 }
879
880 return 0;
881}
882
883static const struct net_device_ops fjes_netdev_ops = {
884 .ndo_open = fjes_open,
885 .ndo_stop = fjes_close,
886 .ndo_start_xmit = fjes_xmit_frame,
887 .ndo_get_stats64 = fjes_get_stats64,
888 .ndo_change_mtu = fjes_change_mtu,
889 .ndo_tx_timeout = fjes_tx_retry,
890 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
891 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
892};
893
894/* fjes_netdev_setup - netdevice initialization routine */
895static void fjes_netdev_setup(struct net_device *netdev)
896{
897 ether_setup(netdev);
898
899 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
900 netdev->netdev_ops = &fjes_netdev_ops;
901 fjes_set_ethtool_ops(netdev);
902 netdev->mtu = fjes_support_mtu[3];
903 netdev->min_mtu = fjes_support_mtu[0];
904 netdev->max_mtu = fjes_support_mtu[3];
905 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
906}
907
908static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
909 int start_epid)
910{
911 struct fjes_hw *hw = &adapter->hw;
912 enum ep_partner_status pstatus;
913 int max_epid, cur_epid;
914 int i;
915
916 max_epid = hw->max_epid;
917 start_epid = (start_epid + 1 + max_epid) % max_epid;
918
919 for (i = 0; i < max_epid; i++) {
920 cur_epid = (start_epid + i) % max_epid;
921 if (cur_epid == hw->my_epid)
922 continue;
923
924 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
925 if (pstatus == EP_PARTNER_SHARED) {
926 if (!fjes_hw_epbuf_rx_is_empty(
927 &hw->ep_shm_info[cur_epid].rx))
928 return cur_epid;
929 }
930 }
931 return -1;
932}
933
934static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
935 int *cur_epid)
936{
937 void *frame;
938
939 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
940 if (*cur_epid < 0)
941 return NULL;
942
943 frame =
944 fjes_hw_epbuf_rx_curpkt_get_addr(
945 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
946
947 return frame;
948}
949
950static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
951{
952 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
953}
954
955static int fjes_poll(struct napi_struct *napi, int budget)
956{
957 struct fjes_adapter *adapter =
958 container_of(napi, struct fjes_adapter, napi);
959 struct net_device *netdev = napi->dev;
960 struct fjes_hw *hw = &adapter->hw;
961 struct sk_buff *skb;
962 int work_done = 0;
963 int cur_epid = 0;
964 int epidx;
965 size_t frame_len;
966 void *frame;
967
968 spin_lock(&hw->rx_status_lock);
969 for (epidx = 0; epidx < hw->max_epid; epidx++) {
970 if (epidx == hw->my_epid)
971 continue;
972
973 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
974 EP_PARTNER_SHARED)
975 adapter->hw.ep_shm_info[epidx]
976 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
977 }
978 spin_unlock(&hw->rx_status_lock);
979
980 while (work_done < budget) {
981 prefetch(&adapter->hw);
982 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
983
984 if (frame) {
985 skb = napi_alloc_skb(napi, frame_len);
986 if (!skb) {
987 adapter->stats64.rx_dropped += 1;
988 hw->ep_shm_info[cur_epid].net_stats
989 .rx_dropped += 1;
990 adapter->stats64.rx_errors += 1;
991 hw->ep_shm_info[cur_epid].net_stats
992 .rx_errors += 1;
993 } else {
994 skb_put_data(skb, frame, frame_len);
995 skb->protocol = eth_type_trans(skb, netdev);
996 skb->ip_summed = CHECKSUM_UNNECESSARY;
997
998 netif_receive_skb(skb);
999
1000 work_done++;
1001
1002 adapter->stats64.rx_packets += 1;
1003 hw->ep_shm_info[cur_epid].net_stats
1004 .rx_packets += 1;
1005 adapter->stats64.rx_bytes += frame_len;
1006 hw->ep_shm_info[cur_epid].net_stats
1007 .rx_bytes += frame_len;
1008
1009 if (is_multicast_ether_addr(
1010 ((struct ethhdr *)frame)->h_dest)) {
1011 adapter->stats64.multicast += 1;
1012 hw->ep_shm_info[cur_epid].net_stats
1013 .multicast += 1;
1014 }
1015 }
1016
1017 fjes_rxframe_release(adapter, cur_epid);
1018 adapter->unset_rx_last = true;
1019 } else {
1020 break;
1021 }
1022 }
1023
1024 if (work_done < budget) {
1025 napi_complete_done(napi, work_done);
1026
1027 if (adapter->unset_rx_last) {
1028 adapter->rx_last_jiffies = jiffies;
1029 adapter->unset_rx_last = false;
1030 }
1031
1032 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1033 napi_schedule(napi);
1034 } else {
1035 spin_lock(&hw->rx_status_lock);
1036 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1037 if (epidx == hw->my_epid)
1038 continue;
1039 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1040 EP_PARTNER_SHARED)
1041 adapter->hw.ep_shm_info[epidx].tx
1042 .info->v1i.rx_status &=
1043 ~FJES_RX_POLL_WORK;
1044 }
1045 spin_unlock(&hw->rx_status_lock);
1046
1047 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1048 }
1049 }
1050
1051 return work_done;
1052}
1053
1054static int fjes_sw_init(struct fjes_adapter *adapter)
1055{
1056 struct net_device *netdev = adapter->netdev;
1057
1058 netif_napi_add(netdev, &adapter->napi, fjes_poll);
1059
1060 return 0;
1061}
1062
1063static void fjes_force_close_task(struct work_struct *work)
1064{
1065 struct fjes_adapter *adapter = container_of(work,
1066 struct fjes_adapter, force_close_task);
1067 struct net_device *netdev = adapter->netdev;
1068
1069 rtnl_lock();
1070 dev_close(netdev);
1071 rtnl_unlock();
1072}
1073
1074static void fjes_tx_stall_task(struct work_struct *work)
1075{
1076 struct fjes_adapter *adapter = container_of(work,
1077 struct fjes_adapter, tx_stall_task);
1078 struct net_device *netdev = adapter->netdev;
1079 struct fjes_hw *hw = &adapter->hw;
1080 int all_queue_available, sendable;
1081 enum ep_partner_status pstatus;
1082 int max_epid, my_epid, epid;
1083 union ep_buffer_info *info;
1084 int i;
1085
1086 if (((long)jiffies -
1087 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
1088 netif_wake_queue(netdev);
1089 return;
1090 }
1091
1092 my_epid = hw->my_epid;
1093 max_epid = hw->max_epid;
1094
1095 for (i = 0; i < 5; i++) {
1096 all_queue_available = 1;
1097
1098 for (epid = 0; epid < max_epid; epid++) {
1099 if (my_epid == epid)
1100 continue;
1101
1102 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1103 sendable = (pstatus == EP_PARTNER_SHARED);
1104 if (!sendable)
1105 continue;
1106
1107 info = adapter->hw.ep_shm_info[epid].tx.info;
1108
1109 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
1110 return;
1111
1112 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
1113 info->v1i.count_max)) {
1114 all_queue_available = 0;
1115 break;
1116 }
1117 }
1118
1119 if (all_queue_available) {
1120 netif_wake_queue(netdev);
1121 return;
1122 }
1123 }
1124
1125 usleep_range(50, 100);
1126
1127 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
1128}
1129
1130static void fjes_raise_intr_rxdata_task(struct work_struct *work)
1131{
1132 struct fjes_adapter *adapter = container_of(work,
1133 struct fjes_adapter, raise_intr_rxdata_task);
1134 struct fjes_hw *hw = &adapter->hw;
1135 enum ep_partner_status pstatus;
1136 int max_epid, my_epid, epid;
1137
1138 my_epid = hw->my_epid;
1139 max_epid = hw->max_epid;
1140
1141 for (epid = 0; epid < max_epid; epid++)
1142 hw->ep_shm_info[epid].tx_status_work = 0;
1143
1144 for (epid = 0; epid < max_epid; epid++) {
1145 if (epid == my_epid)
1146 continue;
1147
1148 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1149 if (pstatus == EP_PARTNER_SHARED) {
1150 hw->ep_shm_info[epid].tx_status_work =
1151 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
1152
1153 if (hw->ep_shm_info[epid].tx_status_work ==
1154 FJES_TX_DELAY_SEND_PENDING) {
1155 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
1156 FJES_TX_DELAY_SEND_NONE;
1157 }
1158 }
1159 }
1160
1161 for (epid = 0; epid < max_epid; epid++) {
1162 if (epid == my_epid)
1163 continue;
1164
1165 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1166 if ((hw->ep_shm_info[epid].tx_status_work ==
1167 FJES_TX_DELAY_SEND_PENDING) &&
1168 (pstatus == EP_PARTNER_SHARED) &&
1169 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
1170 FJES_RX_POLL_WORK)) {
1171 fjes_hw_raise_interrupt(hw, epid,
1172 REG_ICTL_MASK_RX_DATA);
1173 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
1174 }
1175 }
1176
1177 usleep_range(500, 1000);
1178}
1179
1180static void fjes_watch_unshare_task(struct work_struct *work)
1181{
1182 struct fjes_adapter *adapter =
1183 container_of(work, struct fjes_adapter, unshare_watch_task);
1184
1185 struct net_device *netdev = adapter->netdev;
1186 struct fjes_hw *hw = &adapter->hw;
1187
1188 int unshare_watch, unshare_reserve;
1189 int max_epid, my_epid, epidx;
1190 int stop_req, stop_req_done;
1191 ulong unshare_watch_bitmask;
1192 unsigned long flags;
1193 int wait_time = 0;
1194 int is_shared;
1195 int ret;
1196
1197 my_epid = hw->my_epid;
1198 max_epid = hw->max_epid;
1199
1200 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1201 adapter->unshare_watch_bitmask = 0;
1202
1203 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1204 (wait_time < 3000)) {
1205 for (epidx = 0; epidx < max_epid; epidx++) {
1206 if (epidx == my_epid)
1207 continue;
1208
1209 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1210 epidx);
1211
1212 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1213
1214 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1215 FJES_RX_STOP_REQ_DONE;
1216
1217 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1218
1219 unshare_reserve = test_bit(epidx,
1220 &hw->hw_info.buffer_unshare_reserve_bit);
1221
1222 if ((!stop_req ||
1223 (is_shared && (!is_shared || !stop_req_done))) &&
1224 (is_shared || !unshare_watch || !unshare_reserve))
1225 continue;
1226
1227 mutex_lock(&hw->hw_info.lock);
1228 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1229 switch (ret) {
1230 case 0:
1231 break;
1232 case -ENOMSG:
1233 case -EBUSY:
1234 default:
1235 if (!work_pending(
1236 &adapter->force_close_task)) {
1237 adapter->force_reset = true;
1238 schedule_work(
1239 &adapter->force_close_task);
1240 }
1241 break;
1242 }
1243 mutex_unlock(&hw->hw_info.lock);
1244 hw->ep_shm_info[epidx].ep_stats
1245 .com_unregist_buf_exec += 1;
1246
1247 spin_lock_irqsave(&hw->rx_status_lock, flags);
1248 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1249 netdev->dev_addr, netdev->mtu);
1250 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1251
1252 clear_bit(epidx, &hw->txrx_stop_req_bit);
1253 clear_bit(epidx, &unshare_watch_bitmask);
1254 clear_bit(epidx,
1255 &hw->hw_info.buffer_unshare_reserve_bit);
1256 }
1257
1258 msleep(100);
1259 wait_time += 100;
1260 }
1261
1262 if (hw->hw_info.buffer_unshare_reserve_bit) {
1263 for (epidx = 0; epidx < max_epid; epidx++) {
1264 if (epidx == my_epid)
1265 continue;
1266
1267 if (test_bit(epidx,
1268 &hw->hw_info.buffer_unshare_reserve_bit)) {
1269 mutex_lock(&hw->hw_info.lock);
1270
1271 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1272 switch (ret) {
1273 case 0:
1274 break;
1275 case -ENOMSG:
1276 case -EBUSY:
1277 default:
1278 if (!work_pending(
1279 &adapter->force_close_task)) {
1280 adapter->force_reset = true;
1281 schedule_work(
1282 &adapter->force_close_task);
1283 }
1284 break;
1285 }
1286 mutex_unlock(&hw->hw_info.lock);
1287
1288 hw->ep_shm_info[epidx].ep_stats
1289 .com_unregist_buf_exec += 1;
1290
1291 spin_lock_irqsave(&hw->rx_status_lock, flags);
1292 fjes_hw_setup_epbuf(
1293 &hw->ep_shm_info[epidx].tx,
1294 netdev->dev_addr, netdev->mtu);
1295 spin_unlock_irqrestore(&hw->rx_status_lock,
1296 flags);
1297
1298 clear_bit(epidx, &hw->txrx_stop_req_bit);
1299 clear_bit(epidx, &unshare_watch_bitmask);
1300 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1301 }
1302
1303 if (test_bit(epidx, &unshare_watch_bitmask)) {
1304 spin_lock_irqsave(&hw->rx_status_lock, flags);
1305 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1306 ~FJES_RX_STOP_REQ_DONE;
1307 spin_unlock_irqrestore(&hw->rx_status_lock,
1308 flags);
1309 }
1310 }
1311 }
1312}
1313
1314static void fjes_irq_watch_task(struct work_struct *work)
1315{
1316 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1317 struct fjes_adapter, interrupt_watch_task);
1318
1319 local_irq_disable();
1320 fjes_intr(adapter->hw.hw_res.irq, adapter);
1321 local_irq_enable();
1322
1323 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1324 napi_schedule(&adapter->napi);
1325
1326 if (adapter->interrupt_watch_enable) {
1327 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1328 queue_delayed_work(adapter->control_wq,
1329 &adapter->interrupt_watch_task,
1330 FJES_IRQ_WATCH_DELAY);
1331 }
1332}
1333
1334/* fjes_probe - Device Initialization Routine */
1335static int fjes_probe(struct platform_device *plat_dev)
1336{
1337 struct fjes_adapter *adapter;
1338 struct net_device *netdev;
1339 struct resource *res;
1340 struct fjes_hw *hw;
1341 u8 addr[ETH_ALEN];
1342 int err;
1343
1344 err = -ENOMEM;
1345 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1346 NET_NAME_UNKNOWN, fjes_netdev_setup,
1347 FJES_MAX_QUEUES);
1348
1349 if (!netdev)
1350 goto err_out;
1351
1352 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1353
1354 dev_set_drvdata(&plat_dev->dev, netdev);
1355 adapter = netdev_priv(netdev);
1356 adapter->netdev = netdev;
1357 adapter->plat_dev = plat_dev;
1358 hw = &adapter->hw;
1359 hw->back = adapter;
1360
1361 /* setup the private structure */
1362 err = fjes_sw_init(adapter);
1363 if (err)
1364 goto err_free_netdev;
1365
1366 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1367 adapter->force_reset = false;
1368 adapter->open_guard = false;
1369
1370 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1371 if (unlikely(!adapter->txrx_wq)) {
1372 err = -ENOMEM;
1373 goto err_free_netdev;
1374 }
1375
1376 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1377 WQ_MEM_RECLAIM, 0);
1378 if (unlikely(!adapter->control_wq)) {
1379 err = -ENOMEM;
1380 goto err_free_txrx_wq;
1381 }
1382
1383 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1384 INIT_WORK(&adapter->raise_intr_rxdata_task,
1385 fjes_raise_intr_rxdata_task);
1386 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1387 adapter->unshare_watch_bitmask = 0;
1388
1389 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1390 adapter->interrupt_watch_enable = false;
1391
1392 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1393 if (!res) {
1394 err = -EINVAL;
1395 goto err_free_control_wq;
1396 }
1397 hw->hw_res.start = res->start;
1398 hw->hw_res.size = resource_size(res);
1399 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1400 if (hw->hw_res.irq < 0) {
1401 err = hw->hw_res.irq;
1402 goto err_free_control_wq;
1403 }
1404
1405 err = fjes_hw_init(&adapter->hw);
1406 if (err)
1407 goto err_free_control_wq;
1408
1409 /* setup MAC address (02:00:00:00:00:[epid])*/
1410 addr[0] = 2;
1411 addr[1] = 0;
1412 addr[2] = 0;
1413 addr[3] = 0;
1414 addr[4] = 0;
1415 addr[5] = hw->my_epid; /* EPID */
1416 eth_hw_addr_set(netdev, addr);
1417
1418 err = register_netdev(netdev);
1419 if (err)
1420 goto err_hw_exit;
1421
1422 netif_carrier_off(netdev);
1423
1424 fjes_dbg_adapter_init(adapter);
1425
1426 return 0;
1427
1428err_hw_exit:
1429 fjes_hw_exit(&adapter->hw);
1430err_free_control_wq:
1431 destroy_workqueue(adapter->control_wq);
1432err_free_txrx_wq:
1433 destroy_workqueue(adapter->txrx_wq);
1434err_free_netdev:
1435 free_netdev(netdev);
1436err_out:
1437 return err;
1438}
1439
1440/* fjes_remove - Device Removal Routine */
1441static void fjes_remove(struct platform_device *plat_dev)
1442{
1443 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1444 struct fjes_adapter *adapter = netdev_priv(netdev);
1445 struct fjes_hw *hw = &adapter->hw;
1446
1447 fjes_dbg_adapter_exit(adapter);
1448
1449 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1450 cancel_work_sync(&adapter->unshare_watch_task);
1451 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1452 cancel_work_sync(&adapter->tx_stall_task);
1453 if (adapter->control_wq)
1454 destroy_workqueue(adapter->control_wq);
1455 if (adapter->txrx_wq)
1456 destroy_workqueue(adapter->txrx_wq);
1457
1458 unregister_netdev(netdev);
1459
1460 fjes_hw_exit(hw);
1461
1462 netif_napi_del(&adapter->napi);
1463
1464 free_netdev(netdev);
1465}
1466
1467static struct platform_driver fjes_driver = {
1468 .driver = {
1469 .name = DRV_NAME,
1470 },
1471 .probe = fjes_probe,
1472 .remove_new = fjes_remove,
1473};
1474
1475static acpi_status
1476acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1477 void *context, void **return_value)
1478{
1479 struct acpi_device *device;
1480 bool *found = context;
1481
1482 device = acpi_fetch_acpi_dev(obj_handle);
1483 if (!device)
1484 return AE_OK;
1485
1486 if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1487 return AE_OK;
1488
1489 if (!is_extended_socket_device(device))
1490 return AE_OK;
1491
1492 if (acpi_check_extended_socket_status(device))
1493 return AE_OK;
1494
1495 *found = true;
1496 return AE_CTRL_TERMINATE;
1497}
1498
1499/* fjes_init_module - Driver Registration Routine */
1500static int __init fjes_init_module(void)
1501{
1502 bool found = false;
1503 int result;
1504
1505 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1506 acpi_find_extended_socket_device, NULL, &found,
1507 NULL);
1508
1509 if (!found)
1510 return -ENODEV;
1511
1512 pr_info("%s - version %s - %s\n",
1513 fjes_driver_string, fjes_driver_version, fjes_copyright);
1514
1515 fjes_dbg_init();
1516
1517 result = platform_driver_register(&fjes_driver);
1518 if (result < 0) {
1519 fjes_dbg_exit();
1520 return result;
1521 }
1522
1523 result = acpi_bus_register_driver(&fjes_acpi_driver);
1524 if (result < 0)
1525 goto fail_acpi_driver;
1526
1527 return 0;
1528
1529fail_acpi_driver:
1530 platform_driver_unregister(&fjes_driver);
1531 fjes_dbg_exit();
1532 return result;
1533}
1534
1535module_init(fjes_init_module);
1536
1537/* fjes_exit_module - Driver Exit Cleanup Routine */
1538static void __exit fjes_exit_module(void)
1539{
1540 acpi_bus_unregister_driver(&fjes_acpi_driver);
1541 platform_driver_unregister(&fjes_driver);
1542 fjes_dbg_exit();
1543}
1544
1545module_exit(fjes_exit_module);