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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 int fjes_request_irq(struct fjes_adapter *);
36static void fjes_free_irq(struct fjes_adapter *);
37
38static int fjes_open(struct net_device *);
39static int fjes_close(struct net_device *);
40static int fjes_setup_resources(struct fjes_adapter *);
41static void fjes_free_resources(struct fjes_adapter *);
42static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
43static void fjes_raise_intr_rxdata_task(struct work_struct *);
44static void fjes_tx_stall_task(struct work_struct *);
45static void fjes_force_close_task(struct work_struct *);
46static irqreturn_t fjes_intr(int, void*);
47static void fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
48static int fjes_change_mtu(struct net_device *, int);
49static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
50static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
51static void fjes_tx_retry(struct net_device *, unsigned int txqueue);
52
53static int fjes_acpi_add(struct acpi_device *);
54static int fjes_acpi_remove(struct acpi_device *);
55static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
56
57static int fjes_probe(struct platform_device *);
58static int fjes_remove(struct platform_device *);
59
60static int fjes_sw_init(struct fjes_adapter *);
61static void fjes_netdev_setup(struct net_device *);
62static void fjes_irq_watch_task(struct work_struct *);
63static void fjes_watch_unshare_task(struct work_struct *);
64static void fjes_rx_irq(struct fjes_adapter *, int);
65static int fjes_poll(struct napi_struct *, int);
66
67static const struct acpi_device_id fjes_acpi_ids[] = {
68 {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
69 {"", 0},
70};
71MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
72
73static struct acpi_driver fjes_acpi_driver = {
74 .name = DRV_NAME,
75 .class = DRV_NAME,
76 .owner = THIS_MODULE,
77 .ids = fjes_acpi_ids,
78 .ops = {
79 .add = fjes_acpi_add,
80 .remove = fjes_acpi_remove,
81 },
82};
83
84static struct platform_driver fjes_driver = {
85 .driver = {
86 .name = DRV_NAME,
87 },
88 .probe = fjes_probe,
89 .remove = fjes_remove,
90};
91
92static struct resource fjes_resource[] = {
93 DEFINE_RES_MEM(0, 1),
94 DEFINE_RES_IRQ(0)
95};
96
97static bool is_extended_socket_device(struct acpi_device *device)
98{
99 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
100 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
101 union acpi_object *str;
102 acpi_status status;
103 int result;
104
105 status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
106 if (ACPI_FAILURE(status))
107 return false;
108
109 str = buffer.pointer;
110 result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
111 str->string.length, UTF16_LITTLE_ENDIAN,
112 str_buf, sizeof(str_buf) - 1);
113 str_buf[result] = 0;
114
115 if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
116 kfree(buffer.pointer);
117 return false;
118 }
119 kfree(buffer.pointer);
120
121 return true;
122}
123
124static int acpi_check_extended_socket_status(struct acpi_device *device)
125{
126 unsigned long long sta;
127 acpi_status status;
128
129 status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
130 if (ACPI_FAILURE(status))
131 return -ENODEV;
132
133 if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
134 (sta & ACPI_STA_DEVICE_ENABLED) &&
135 (sta & ACPI_STA_DEVICE_UI) &&
136 (sta & ACPI_STA_DEVICE_FUNCTIONING)))
137 return -ENODEV;
138
139 return 0;
140}
141
142static int fjes_acpi_add(struct acpi_device *device)
143{
144 struct platform_device *plat_dev;
145 acpi_status status;
146
147 if (!is_extended_socket_device(device))
148 return -ENODEV;
149
150 if (acpi_check_extended_socket_status(device))
151 return -ENODEV;
152
153 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
154 fjes_get_acpi_resource, fjes_resource);
155 if (ACPI_FAILURE(status))
156 return -ENODEV;
157
158
159 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
160 ARRAY_SIZE(fjes_resource));
161 if (IS_ERR(plat_dev))
162 return PTR_ERR(plat_dev);
163
164 device->driver_data = plat_dev;
165
166 return 0;
167}
168
169static int fjes_acpi_remove(struct acpi_device *device)
170{
171 struct platform_device *plat_dev;
172
173 plat_dev = (struct platform_device *)acpi_driver_data(device);
174 platform_device_unregister(plat_dev);
175
176 return 0;
177}
178
179static acpi_status
180fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
181{
182 struct acpi_resource_address32 *addr;
183 struct acpi_resource_irq *irq;
184 struct resource *res = data;
185
186 switch (acpi_res->type) {
187 case ACPI_RESOURCE_TYPE_ADDRESS32:
188 addr = &acpi_res->data.address32;
189 res[0].start = addr->address.minimum;
190 res[0].end = addr->address.minimum +
191 addr->address.address_length - 1;
192 break;
193
194 case ACPI_RESOURCE_TYPE_IRQ:
195 irq = &acpi_res->data.irq;
196 if (irq->interrupt_count != 1)
197 return AE_ERROR;
198 res[1].start = irq->interrupts[0];
199 res[1].end = irq->interrupts[0];
200 break;
201
202 default:
203 break;
204 }
205
206 return AE_OK;
207}
208
209static int fjes_request_irq(struct fjes_adapter *adapter)
210{
211 struct net_device *netdev = adapter->netdev;
212 int result = -1;
213
214 adapter->interrupt_watch_enable = true;
215 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
216 queue_delayed_work(adapter->control_wq,
217 &adapter->interrupt_watch_task,
218 FJES_IRQ_WATCH_DELAY);
219 }
220
221 if (!adapter->irq_registered) {
222 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
223 IRQF_SHARED, netdev->name, adapter);
224 if (result)
225 adapter->irq_registered = false;
226 else
227 adapter->irq_registered = true;
228 }
229
230 return result;
231}
232
233static void fjes_free_irq(struct fjes_adapter *adapter)
234{
235 struct fjes_hw *hw = &adapter->hw;
236
237 adapter->interrupt_watch_enable = false;
238 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
239
240 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
241
242 if (adapter->irq_registered) {
243 free_irq(adapter->hw.hw_res.irq, adapter);
244 adapter->irq_registered = false;
245 }
246}
247
248static const struct net_device_ops fjes_netdev_ops = {
249 .ndo_open = fjes_open,
250 .ndo_stop = fjes_close,
251 .ndo_start_xmit = fjes_xmit_frame,
252 .ndo_get_stats64 = fjes_get_stats64,
253 .ndo_change_mtu = fjes_change_mtu,
254 .ndo_tx_timeout = fjes_tx_retry,
255 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
256 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
257};
258
259
260static int fjes_open(struct net_device *netdev)
261{
262 struct fjes_adapter *adapter = netdev_priv(netdev);
263 struct fjes_hw *hw = &adapter->hw;
264 int result;
265
266 if (adapter->open_guard)
267 return -ENXIO;
268
269 result = fjes_setup_resources(adapter);
270 if (result)
271 goto err_setup_res;
272
273 hw->txrx_stop_req_bit = 0;
274 hw->epstop_req_bit = 0;
275
276 napi_enable(&adapter->napi);
277
278 fjes_hw_capture_interrupt_status(hw);
279
280 result = fjes_request_irq(adapter);
281 if (result)
282 goto err_req_irq;
283
284 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
285
286 netif_tx_start_all_queues(netdev);
287 netif_carrier_on(netdev);
288
289 return 0;
290
291err_req_irq:
292 fjes_free_irq(adapter);
293 napi_disable(&adapter->napi);
294
295err_setup_res:
296 fjes_free_resources(adapter);
297 return result;
298}
299
300
301static int fjes_close(struct net_device *netdev)
302{
303 struct fjes_adapter *adapter = netdev_priv(netdev);
304 struct fjes_hw *hw = &adapter->hw;
305 unsigned long flags;
306 int epidx;
307
308 netif_tx_stop_all_queues(netdev);
309 netif_carrier_off(netdev);
310
311 fjes_hw_raise_epstop(hw);
312
313 napi_disable(&adapter->napi);
314
315 spin_lock_irqsave(&hw->rx_status_lock, flags);
316 for (epidx = 0; epidx < hw->max_epid; epidx++) {
317 if (epidx == hw->my_epid)
318 continue;
319
320 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
321 EP_PARTNER_SHARED)
322 adapter->hw.ep_shm_info[epidx]
323 .tx.info->v1i.rx_status &=
324 ~FJES_RX_POLL_WORK;
325 }
326 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
327
328 fjes_free_irq(adapter);
329
330 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
331 cancel_work_sync(&adapter->unshare_watch_task);
332 adapter->unshare_watch_bitmask = 0;
333 cancel_work_sync(&adapter->raise_intr_rxdata_task);
334 cancel_work_sync(&adapter->tx_stall_task);
335
336 cancel_work_sync(&hw->update_zone_task);
337 cancel_work_sync(&hw->epstop_task);
338
339 fjes_hw_wait_epstop(hw);
340
341 fjes_free_resources(adapter);
342
343 return 0;
344}
345
346static int fjes_setup_resources(struct fjes_adapter *adapter)
347{
348 struct net_device *netdev = adapter->netdev;
349 struct ep_share_mem_info *buf_pair;
350 struct fjes_hw *hw = &adapter->hw;
351 unsigned long flags;
352 int result;
353 int epidx;
354
355 mutex_lock(&hw->hw_info.lock);
356 result = fjes_hw_request_info(hw);
357 switch (result) {
358 case 0:
359 for (epidx = 0; epidx < hw->max_epid; epidx++) {
360 hw->ep_shm_info[epidx].es_status =
361 hw->hw_info.res_buf->info.info[epidx].es_status;
362 hw->ep_shm_info[epidx].zone =
363 hw->hw_info.res_buf->info.info[epidx].zone;
364 }
365 break;
366 default:
367 case -ENOMSG:
368 case -EBUSY:
369 adapter->force_reset = true;
370
371 mutex_unlock(&hw->hw_info.lock);
372 return result;
373 }
374 mutex_unlock(&hw->hw_info.lock);
375
376 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
377 if ((epidx != hw->my_epid) &&
378 (hw->ep_shm_info[epidx].es_status ==
379 FJES_ZONING_STATUS_ENABLE)) {
380 fjes_hw_raise_interrupt(hw, epidx,
381 REG_ICTL_MASK_INFO_UPDATE);
382 hw->ep_shm_info[epidx].ep_stats
383 .send_intr_zoneupdate += 1;
384 }
385 }
386
387 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
388
389 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
390 if (epidx == hw->my_epid)
391 continue;
392
393 buf_pair = &hw->ep_shm_info[epidx];
394
395 spin_lock_irqsave(&hw->rx_status_lock, flags);
396 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
397 netdev->mtu);
398 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
399
400 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
401 mutex_lock(&hw->hw_info.lock);
402 result =
403 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
404 mutex_unlock(&hw->hw_info.lock);
405
406 switch (result) {
407 case 0:
408 break;
409 case -ENOMSG:
410 case -EBUSY:
411 default:
412 adapter->force_reset = true;
413 return result;
414 }
415
416 hw->ep_shm_info[epidx].ep_stats
417 .com_regist_buf_exec += 1;
418 }
419 }
420
421 return 0;
422}
423
424static void fjes_free_resources(struct fjes_adapter *adapter)
425{
426 struct net_device *netdev = adapter->netdev;
427 struct fjes_device_command_param param;
428 struct ep_share_mem_info *buf_pair;
429 struct fjes_hw *hw = &adapter->hw;
430 bool reset_flag = false;
431 unsigned long flags;
432 int result;
433 int epidx;
434
435 for (epidx = 0; epidx < hw->max_epid; epidx++) {
436 if (epidx == hw->my_epid)
437 continue;
438
439 mutex_lock(&hw->hw_info.lock);
440 result = fjes_hw_unregister_buff_addr(hw, epidx);
441 mutex_unlock(&hw->hw_info.lock);
442
443 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
444
445 if (result)
446 reset_flag = true;
447
448 buf_pair = &hw->ep_shm_info[epidx];
449
450 spin_lock_irqsave(&hw->rx_status_lock, flags);
451 fjes_hw_setup_epbuf(&buf_pair->tx,
452 netdev->dev_addr, netdev->mtu);
453 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
454
455 clear_bit(epidx, &hw->txrx_stop_req_bit);
456 }
457
458 if (reset_flag || adapter->force_reset) {
459 result = fjes_hw_reset(hw);
460
461 adapter->force_reset = false;
462
463 if (result)
464 adapter->open_guard = true;
465
466 hw->hw_info.buffer_share_bit = 0;
467
468 memset((void *)¶m, 0, sizeof(param));
469
470 param.req_len = hw->hw_info.req_buf_size;
471 param.req_start = __pa(hw->hw_info.req_buf);
472 param.res_len = hw->hw_info.res_buf_size;
473 param.res_start = __pa(hw->hw_info.res_buf);
474 param.share_start = __pa(hw->hw_info.share->ep_status);
475
476 fjes_hw_init_command_registers(hw, ¶m);
477 }
478}
479
480static void fjes_tx_stall_task(struct work_struct *work)
481{
482 struct fjes_adapter *adapter = container_of(work,
483 struct fjes_adapter, tx_stall_task);
484 struct net_device *netdev = adapter->netdev;
485 struct fjes_hw *hw = &adapter->hw;
486 int all_queue_available, sendable;
487 enum ep_partner_status pstatus;
488 int max_epid, my_epid, epid;
489 union ep_buffer_info *info;
490 int i;
491
492 if (((long)jiffies -
493 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
494 netif_wake_queue(netdev);
495 return;
496 }
497
498 my_epid = hw->my_epid;
499 max_epid = hw->max_epid;
500
501 for (i = 0; i < 5; i++) {
502 all_queue_available = 1;
503
504 for (epid = 0; epid < max_epid; epid++) {
505 if (my_epid == epid)
506 continue;
507
508 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
509 sendable = (pstatus == EP_PARTNER_SHARED);
510 if (!sendable)
511 continue;
512
513 info = adapter->hw.ep_shm_info[epid].tx.info;
514
515 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
516 return;
517
518 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
519 info->v1i.count_max)) {
520 all_queue_available = 0;
521 break;
522 }
523 }
524
525 if (all_queue_available) {
526 netif_wake_queue(netdev);
527 return;
528 }
529 }
530
531 usleep_range(50, 100);
532
533 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
534}
535
536static void fjes_force_close_task(struct work_struct *work)
537{
538 struct fjes_adapter *adapter = container_of(work,
539 struct fjes_adapter, force_close_task);
540 struct net_device *netdev = adapter->netdev;
541
542 rtnl_lock();
543 dev_close(netdev);
544 rtnl_unlock();
545}
546
547static void fjes_raise_intr_rxdata_task(struct work_struct *work)
548{
549 struct fjes_adapter *adapter = container_of(work,
550 struct fjes_adapter, raise_intr_rxdata_task);
551 struct fjes_hw *hw = &adapter->hw;
552 enum ep_partner_status pstatus;
553 int max_epid, my_epid, epid;
554
555 my_epid = hw->my_epid;
556 max_epid = hw->max_epid;
557
558 for (epid = 0; epid < max_epid; epid++)
559 hw->ep_shm_info[epid].tx_status_work = 0;
560
561 for (epid = 0; epid < max_epid; epid++) {
562 if (epid == my_epid)
563 continue;
564
565 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
566 if (pstatus == EP_PARTNER_SHARED) {
567 hw->ep_shm_info[epid].tx_status_work =
568 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
569
570 if (hw->ep_shm_info[epid].tx_status_work ==
571 FJES_TX_DELAY_SEND_PENDING) {
572 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
573 FJES_TX_DELAY_SEND_NONE;
574 }
575 }
576 }
577
578 for (epid = 0; epid < max_epid; epid++) {
579 if (epid == my_epid)
580 continue;
581
582 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
583 if ((hw->ep_shm_info[epid].tx_status_work ==
584 FJES_TX_DELAY_SEND_PENDING) &&
585 (pstatus == EP_PARTNER_SHARED) &&
586 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
587 FJES_RX_POLL_WORK)) {
588 fjes_hw_raise_interrupt(hw, epid,
589 REG_ICTL_MASK_RX_DATA);
590 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
591 }
592 }
593
594 usleep_range(500, 1000);
595}
596
597static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
598 void *data, size_t len)
599{
600 int retval;
601
602 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
603 data, len);
604 if (retval)
605 return retval;
606
607 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
608 FJES_TX_DELAY_SEND_PENDING;
609 if (!work_pending(&adapter->raise_intr_rxdata_task))
610 queue_work(adapter->txrx_wq,
611 &adapter->raise_intr_rxdata_task);
612
613 retval = 0;
614 return retval;
615}
616
617static netdev_tx_t
618fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
619{
620 struct fjes_adapter *adapter = netdev_priv(netdev);
621 struct fjes_hw *hw = &adapter->hw;
622
623 int max_epid, my_epid, dest_epid;
624 enum ep_partner_status pstatus;
625 struct netdev_queue *cur_queue;
626 char shortpkt[VLAN_ETH_HLEN];
627 bool is_multi, vlan;
628 struct ethhdr *eth;
629 u16 queue_no = 0;
630 u16 vlan_id = 0;
631 netdev_tx_t ret;
632 char *data;
633 int len;
634
635 ret = NETDEV_TX_OK;
636 is_multi = false;
637 cur_queue = netdev_get_tx_queue(netdev, queue_no);
638
639 eth = (struct ethhdr *)skb->data;
640 my_epid = hw->my_epid;
641
642 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
643
644 data = skb->data;
645 len = skb->len;
646
647 if (is_multicast_ether_addr(eth->h_dest)) {
648 dest_epid = 0;
649 max_epid = hw->max_epid;
650 is_multi = true;
651 } else if (is_local_ether_addr(eth->h_dest)) {
652 dest_epid = eth->h_dest[ETH_ALEN - 1];
653 max_epid = dest_epid + 1;
654
655 if ((eth->h_dest[0] == 0x02) &&
656 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
657 eth->h_dest[3] | eth->h_dest[4])) &&
658 (dest_epid < hw->max_epid)) {
659 ;
660 } else {
661 dest_epid = 0;
662 max_epid = 0;
663 ret = NETDEV_TX_OK;
664
665 adapter->stats64.tx_packets += 1;
666 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
667 adapter->stats64.tx_bytes += len;
668 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
669 }
670 } else {
671 dest_epid = 0;
672 max_epid = 0;
673 ret = NETDEV_TX_OK;
674
675 adapter->stats64.tx_packets += 1;
676 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
677 adapter->stats64.tx_bytes += len;
678 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
679 }
680
681 for (; dest_epid < max_epid; dest_epid++) {
682 if (my_epid == dest_epid)
683 continue;
684
685 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
686 if (pstatus != EP_PARTNER_SHARED) {
687 if (!is_multi)
688 hw->ep_shm_info[dest_epid].ep_stats
689 .tx_dropped_not_shared += 1;
690 ret = NETDEV_TX_OK;
691 } else if (!fjes_hw_check_epbuf_version(
692 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
693
694 adapter->stats64.tx_carrier_errors += 1;
695 hw->ep_shm_info[dest_epid].net_stats
696 .tx_carrier_errors += 1;
697 hw->ep_shm_info[dest_epid].ep_stats
698 .tx_dropped_ver_mismatch += 1;
699
700 ret = NETDEV_TX_OK;
701 } else if (!fjes_hw_check_mtu(
702 &adapter->hw.ep_shm_info[dest_epid].rx,
703 netdev->mtu)) {
704 adapter->stats64.tx_dropped += 1;
705 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
706 adapter->stats64.tx_errors += 1;
707 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
708 hw->ep_shm_info[dest_epid].ep_stats
709 .tx_dropped_buf_size_mismatch += 1;
710
711 ret = NETDEV_TX_OK;
712 } else if (vlan &&
713 !fjes_hw_check_vlan_id(
714 &adapter->hw.ep_shm_info[dest_epid].rx,
715 vlan_id)) {
716 hw->ep_shm_info[dest_epid].ep_stats
717 .tx_dropped_vlanid_mismatch += 1;
718 ret = NETDEV_TX_OK;
719 } else {
720 if (len < VLAN_ETH_HLEN) {
721 memset(shortpkt, 0, VLAN_ETH_HLEN);
722 memcpy(shortpkt, skb->data, skb->len);
723 len = VLAN_ETH_HLEN;
724 data = shortpkt;
725 }
726
727 if (adapter->tx_retry_count == 0) {
728 adapter->tx_start_jiffies = jiffies;
729 adapter->tx_retry_count = 1;
730 } else {
731 adapter->tx_retry_count++;
732 }
733
734 if (fjes_tx_send(adapter, dest_epid, data, len)) {
735 if (is_multi) {
736 ret = NETDEV_TX_OK;
737 } else if (
738 ((long)jiffies -
739 (long)adapter->tx_start_jiffies) >=
740 FJES_TX_RETRY_TIMEOUT) {
741 adapter->stats64.tx_fifo_errors += 1;
742 hw->ep_shm_info[dest_epid].net_stats
743 .tx_fifo_errors += 1;
744 adapter->stats64.tx_errors += 1;
745 hw->ep_shm_info[dest_epid].net_stats
746 .tx_errors += 1;
747
748 ret = NETDEV_TX_OK;
749 } else {
750 netif_trans_update(netdev);
751 hw->ep_shm_info[dest_epid].ep_stats
752 .tx_buffer_full += 1;
753 netif_tx_stop_queue(cur_queue);
754
755 if (!work_pending(&adapter->tx_stall_task))
756 queue_work(adapter->txrx_wq,
757 &adapter->tx_stall_task);
758
759 ret = NETDEV_TX_BUSY;
760 }
761 } else {
762 if (!is_multi) {
763 adapter->stats64.tx_packets += 1;
764 hw->ep_shm_info[dest_epid].net_stats
765 .tx_packets += 1;
766 adapter->stats64.tx_bytes += len;
767 hw->ep_shm_info[dest_epid].net_stats
768 .tx_bytes += len;
769 }
770
771 adapter->tx_retry_count = 0;
772 ret = NETDEV_TX_OK;
773 }
774 }
775 }
776
777 if (ret == NETDEV_TX_OK) {
778 dev_kfree_skb(skb);
779 if (is_multi) {
780 adapter->stats64.tx_packets += 1;
781 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
782 adapter->stats64.tx_bytes += 1;
783 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
784 }
785 }
786
787 return ret;
788}
789
790static void fjes_tx_retry(struct net_device *netdev, unsigned int txqueue)
791{
792 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
793
794 netif_tx_wake_queue(queue);
795}
796
797static void
798fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
799{
800 struct fjes_adapter *adapter = netdev_priv(netdev);
801
802 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
803}
804
805static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
806{
807 struct fjes_adapter *adapter = netdev_priv(netdev);
808 bool running = netif_running(netdev);
809 struct fjes_hw *hw = &adapter->hw;
810 unsigned long flags;
811 int ret = -EINVAL;
812 int idx, epidx;
813
814 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
815 if (new_mtu <= fjes_support_mtu[idx]) {
816 new_mtu = fjes_support_mtu[idx];
817 if (new_mtu == netdev->mtu)
818 return 0;
819
820 ret = 0;
821 break;
822 }
823 }
824
825 if (ret)
826 return ret;
827
828 if (running) {
829 spin_lock_irqsave(&hw->rx_status_lock, flags);
830 for (epidx = 0; epidx < hw->max_epid; epidx++) {
831 if (epidx == hw->my_epid)
832 continue;
833 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
834 ~FJES_RX_MTU_CHANGING_DONE;
835 }
836 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
837
838 netif_tx_stop_all_queues(netdev);
839 netif_carrier_off(netdev);
840 cancel_work_sync(&adapter->tx_stall_task);
841 napi_disable(&adapter->napi);
842
843 msleep(1000);
844
845 netif_tx_stop_all_queues(netdev);
846 }
847
848 netdev->mtu = new_mtu;
849
850 if (running) {
851 for (epidx = 0; epidx < hw->max_epid; epidx++) {
852 if (epidx == hw->my_epid)
853 continue;
854
855 spin_lock_irqsave(&hw->rx_status_lock, flags);
856 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
857 netdev->dev_addr,
858 netdev->mtu);
859
860 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
861 FJES_RX_MTU_CHANGING_DONE;
862 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
863 }
864
865 netif_tx_wake_all_queues(netdev);
866 netif_carrier_on(netdev);
867 napi_enable(&adapter->napi);
868 napi_schedule(&adapter->napi);
869 }
870
871 return ret;
872}
873
874static int fjes_vlan_rx_add_vid(struct net_device *netdev,
875 __be16 proto, u16 vid)
876{
877 struct fjes_adapter *adapter = netdev_priv(netdev);
878 bool ret = true;
879 int epid;
880
881 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
882 if (epid == adapter->hw.my_epid)
883 continue;
884
885 if (!fjes_hw_check_vlan_id(
886 &adapter->hw.ep_shm_info[epid].tx, vid))
887 ret = fjes_hw_set_vlan_id(
888 &adapter->hw.ep_shm_info[epid].tx, vid);
889 }
890
891 return ret ? 0 : -ENOSPC;
892}
893
894static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
895 __be16 proto, u16 vid)
896{
897 struct fjes_adapter *adapter = netdev_priv(netdev);
898 int epid;
899
900 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
901 if (epid == adapter->hw.my_epid)
902 continue;
903
904 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
905 }
906
907 return 0;
908}
909
910static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
911 int src_epid)
912{
913 struct fjes_hw *hw = &adapter->hw;
914 enum ep_partner_status status;
915 unsigned long flags;
916
917 status = fjes_hw_get_partner_ep_status(hw, src_epid);
918 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
919 switch (status) {
920 case EP_PARTNER_UNSHARE:
921 case EP_PARTNER_COMPLETE:
922 default:
923 break;
924 case EP_PARTNER_WAITING:
925 if (src_epid < hw->my_epid) {
926 spin_lock_irqsave(&hw->rx_status_lock, flags);
927 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
928 FJES_RX_STOP_REQ_DONE;
929 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
930
931 clear_bit(src_epid, &hw->txrx_stop_req_bit);
932 set_bit(src_epid, &adapter->unshare_watch_bitmask);
933
934 if (!work_pending(&adapter->unshare_watch_task))
935 queue_work(adapter->control_wq,
936 &adapter->unshare_watch_task);
937 }
938 break;
939 case EP_PARTNER_SHARED:
940 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
941 FJES_RX_STOP_REQ_REQUEST) {
942 set_bit(src_epid, &hw->epstop_req_bit);
943 if (!work_pending(&hw->epstop_task))
944 queue_work(adapter->control_wq,
945 &hw->epstop_task);
946 }
947 break;
948 }
949 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
950}
951
952static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
953{
954 struct fjes_hw *hw = &adapter->hw;
955 enum ep_partner_status status;
956 unsigned long flags;
957
958 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
959
960 status = fjes_hw_get_partner_ep_status(hw, src_epid);
961 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
962 switch (status) {
963 case EP_PARTNER_WAITING:
964 spin_lock_irqsave(&hw->rx_status_lock, flags);
965 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
966 FJES_RX_STOP_REQ_DONE;
967 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
968 clear_bit(src_epid, &hw->txrx_stop_req_bit);
969 fallthrough;
970 case EP_PARTNER_UNSHARE:
971 case EP_PARTNER_COMPLETE:
972 default:
973 set_bit(src_epid, &adapter->unshare_watch_bitmask);
974 if (!work_pending(&adapter->unshare_watch_task))
975 queue_work(adapter->control_wq,
976 &adapter->unshare_watch_task);
977 break;
978 case EP_PARTNER_SHARED:
979 set_bit(src_epid, &hw->epstop_req_bit);
980
981 if (!work_pending(&hw->epstop_task))
982 queue_work(adapter->control_wq, &hw->epstop_task);
983 break;
984 }
985 trace_fjes_stop_req_irq_post(hw, src_epid);
986}
987
988static void fjes_update_zone_irq(struct fjes_adapter *adapter,
989 int src_epid)
990{
991 struct fjes_hw *hw = &adapter->hw;
992
993 if (!work_pending(&hw->update_zone_task))
994 queue_work(adapter->control_wq, &hw->update_zone_task);
995}
996
997static irqreturn_t fjes_intr(int irq, void *data)
998{
999 struct fjes_adapter *adapter = data;
1000 struct fjes_hw *hw = &adapter->hw;
1001 irqreturn_t ret;
1002 u32 icr;
1003
1004 icr = fjes_hw_capture_interrupt_status(hw);
1005
1006 if (icr & REG_IS_MASK_IS_ASSERT) {
1007 if (icr & REG_ICTL_MASK_RX_DATA) {
1008 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
1009 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1010 .recv_intr_rx += 1;
1011 }
1012
1013 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
1014 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1015 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1016 .recv_intr_stop += 1;
1017 }
1018
1019 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1020 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1021 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1022 .recv_intr_unshare += 1;
1023 }
1024
1025 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
1026 fjes_hw_set_irqmask(hw,
1027 REG_ICTL_MASK_TXRX_STOP_DONE, true);
1028
1029 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
1030 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
1031 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1032 .recv_intr_zoneupdate += 1;
1033 }
1034
1035 ret = IRQ_HANDLED;
1036 } else {
1037 ret = IRQ_NONE;
1038 }
1039
1040 return ret;
1041}
1042
1043static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1044 int start_epid)
1045{
1046 struct fjes_hw *hw = &adapter->hw;
1047 enum ep_partner_status pstatus;
1048 int max_epid, cur_epid;
1049 int i;
1050
1051 max_epid = hw->max_epid;
1052 start_epid = (start_epid + 1 + max_epid) % max_epid;
1053
1054 for (i = 0; i < max_epid; i++) {
1055 cur_epid = (start_epid + i) % max_epid;
1056 if (cur_epid == hw->my_epid)
1057 continue;
1058
1059 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1060 if (pstatus == EP_PARTNER_SHARED) {
1061 if (!fjes_hw_epbuf_rx_is_empty(
1062 &hw->ep_shm_info[cur_epid].rx))
1063 return cur_epid;
1064 }
1065 }
1066 return -1;
1067}
1068
1069static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1070 int *cur_epid)
1071{
1072 void *frame;
1073
1074 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1075 if (*cur_epid < 0)
1076 return NULL;
1077
1078 frame =
1079 fjes_hw_epbuf_rx_curpkt_get_addr(
1080 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1081
1082 return frame;
1083}
1084
1085static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1086{
1087 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1088}
1089
1090static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1091{
1092 struct fjes_hw *hw = &adapter->hw;
1093
1094 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1095
1096 adapter->unset_rx_last = true;
1097 napi_schedule(&adapter->napi);
1098}
1099
1100static int fjes_poll(struct napi_struct *napi, int budget)
1101{
1102 struct fjes_adapter *adapter =
1103 container_of(napi, struct fjes_adapter, napi);
1104 struct net_device *netdev = napi->dev;
1105 struct fjes_hw *hw = &adapter->hw;
1106 struct sk_buff *skb;
1107 int work_done = 0;
1108 int cur_epid = 0;
1109 int epidx;
1110 size_t frame_len;
1111 void *frame;
1112
1113 spin_lock(&hw->rx_status_lock);
1114 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1115 if (epidx == hw->my_epid)
1116 continue;
1117
1118 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1119 EP_PARTNER_SHARED)
1120 adapter->hw.ep_shm_info[epidx]
1121 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1122 }
1123 spin_unlock(&hw->rx_status_lock);
1124
1125 while (work_done < budget) {
1126 prefetch(&adapter->hw);
1127 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1128
1129 if (frame) {
1130 skb = napi_alloc_skb(napi, frame_len);
1131 if (!skb) {
1132 adapter->stats64.rx_dropped += 1;
1133 hw->ep_shm_info[cur_epid].net_stats
1134 .rx_dropped += 1;
1135 adapter->stats64.rx_errors += 1;
1136 hw->ep_shm_info[cur_epid].net_stats
1137 .rx_errors += 1;
1138 } else {
1139 skb_put_data(skb, frame, frame_len);
1140 skb->protocol = eth_type_trans(skb, netdev);
1141 skb->ip_summed = CHECKSUM_UNNECESSARY;
1142
1143 netif_receive_skb(skb);
1144
1145 work_done++;
1146
1147 adapter->stats64.rx_packets += 1;
1148 hw->ep_shm_info[cur_epid].net_stats
1149 .rx_packets += 1;
1150 adapter->stats64.rx_bytes += frame_len;
1151 hw->ep_shm_info[cur_epid].net_stats
1152 .rx_bytes += frame_len;
1153
1154 if (is_multicast_ether_addr(
1155 ((struct ethhdr *)frame)->h_dest)) {
1156 adapter->stats64.multicast += 1;
1157 hw->ep_shm_info[cur_epid].net_stats
1158 .multicast += 1;
1159 }
1160 }
1161
1162 fjes_rxframe_release(adapter, cur_epid);
1163 adapter->unset_rx_last = true;
1164 } else {
1165 break;
1166 }
1167 }
1168
1169 if (work_done < budget) {
1170 napi_complete_done(napi, work_done);
1171
1172 if (adapter->unset_rx_last) {
1173 adapter->rx_last_jiffies = jiffies;
1174 adapter->unset_rx_last = false;
1175 }
1176
1177 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1178 napi_reschedule(napi);
1179 } else {
1180 spin_lock(&hw->rx_status_lock);
1181 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1182 if (epidx == hw->my_epid)
1183 continue;
1184 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1185 EP_PARTNER_SHARED)
1186 adapter->hw.ep_shm_info[epidx].tx
1187 .info->v1i.rx_status &=
1188 ~FJES_RX_POLL_WORK;
1189 }
1190 spin_unlock(&hw->rx_status_lock);
1191
1192 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1193 }
1194 }
1195
1196 return work_done;
1197}
1198
1199
1200static int fjes_probe(struct platform_device *plat_dev)
1201{
1202 struct fjes_adapter *adapter;
1203 struct net_device *netdev;
1204 struct resource *res;
1205 struct fjes_hw *hw;
1206 u8 addr[ETH_ALEN];
1207 int err;
1208
1209 err = -ENOMEM;
1210 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1211 NET_NAME_UNKNOWN, fjes_netdev_setup,
1212 FJES_MAX_QUEUES);
1213
1214 if (!netdev)
1215 goto err_out;
1216
1217 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1218
1219 dev_set_drvdata(&plat_dev->dev, netdev);
1220 adapter = netdev_priv(netdev);
1221 adapter->netdev = netdev;
1222 adapter->plat_dev = plat_dev;
1223 hw = &adapter->hw;
1224 hw->back = adapter;
1225
1226
1227 err = fjes_sw_init(adapter);
1228 if (err)
1229 goto err_free_netdev;
1230
1231 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1232 adapter->force_reset = false;
1233 adapter->open_guard = false;
1234
1235 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1236 if (unlikely(!adapter->txrx_wq)) {
1237 err = -ENOMEM;
1238 goto err_free_netdev;
1239 }
1240
1241 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1242 WQ_MEM_RECLAIM, 0);
1243 if (unlikely(!adapter->control_wq)) {
1244 err = -ENOMEM;
1245 goto err_free_txrx_wq;
1246 }
1247
1248 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1249 INIT_WORK(&adapter->raise_intr_rxdata_task,
1250 fjes_raise_intr_rxdata_task);
1251 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1252 adapter->unshare_watch_bitmask = 0;
1253
1254 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1255 adapter->interrupt_watch_enable = false;
1256
1257 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1258 if (!res) {
1259 err = -EINVAL;
1260 goto err_free_control_wq;
1261 }
1262 hw->hw_res.start = res->start;
1263 hw->hw_res.size = resource_size(res);
1264 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1265 if (hw->hw_res.irq < 0) {
1266 err = hw->hw_res.irq;
1267 goto err_free_control_wq;
1268 }
1269
1270 err = fjes_hw_init(&adapter->hw);
1271 if (err)
1272 goto err_free_control_wq;
1273
1274
1275 addr[0] = 2;
1276 addr[1] = 0;
1277 addr[2] = 0;
1278 addr[3] = 0;
1279 addr[4] = 0;
1280 addr[5] = hw->my_epid;
1281 eth_hw_addr_set(netdev, addr);
1282
1283 err = register_netdev(netdev);
1284 if (err)
1285 goto err_hw_exit;
1286
1287 netif_carrier_off(netdev);
1288
1289 fjes_dbg_adapter_init(adapter);
1290
1291 return 0;
1292
1293err_hw_exit:
1294 fjes_hw_exit(&adapter->hw);
1295err_free_control_wq:
1296 destroy_workqueue(adapter->control_wq);
1297err_free_txrx_wq:
1298 destroy_workqueue(adapter->txrx_wq);
1299err_free_netdev:
1300 free_netdev(netdev);
1301err_out:
1302 return err;
1303}
1304
1305
1306static int fjes_remove(struct platform_device *plat_dev)
1307{
1308 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1309 struct fjes_adapter *adapter = netdev_priv(netdev);
1310 struct fjes_hw *hw = &adapter->hw;
1311
1312 fjes_dbg_adapter_exit(adapter);
1313
1314 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1315 cancel_work_sync(&adapter->unshare_watch_task);
1316 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1317 cancel_work_sync(&adapter->tx_stall_task);
1318 if (adapter->control_wq)
1319 destroy_workqueue(adapter->control_wq);
1320 if (adapter->txrx_wq)
1321 destroy_workqueue(adapter->txrx_wq);
1322
1323 unregister_netdev(netdev);
1324
1325 fjes_hw_exit(hw);
1326
1327 netif_napi_del(&adapter->napi);
1328
1329 free_netdev(netdev);
1330
1331 return 0;
1332}
1333
1334static int fjes_sw_init(struct fjes_adapter *adapter)
1335{
1336 struct net_device *netdev = adapter->netdev;
1337
1338 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1339
1340 return 0;
1341}
1342
1343
1344static void fjes_netdev_setup(struct net_device *netdev)
1345{
1346 ether_setup(netdev);
1347
1348 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1349 netdev->netdev_ops = &fjes_netdev_ops;
1350 fjes_set_ethtool_ops(netdev);
1351 netdev->mtu = fjes_support_mtu[3];
1352 netdev->min_mtu = fjes_support_mtu[0];
1353 netdev->max_mtu = fjes_support_mtu[3];
1354 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1355}
1356
1357static void fjes_irq_watch_task(struct work_struct *work)
1358{
1359 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1360 struct fjes_adapter, interrupt_watch_task);
1361
1362 local_irq_disable();
1363 fjes_intr(adapter->hw.hw_res.irq, adapter);
1364 local_irq_enable();
1365
1366 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1367 napi_schedule(&adapter->napi);
1368
1369 if (adapter->interrupt_watch_enable) {
1370 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1371 queue_delayed_work(adapter->control_wq,
1372 &adapter->interrupt_watch_task,
1373 FJES_IRQ_WATCH_DELAY);
1374 }
1375}
1376
1377static void fjes_watch_unshare_task(struct work_struct *work)
1378{
1379 struct fjes_adapter *adapter =
1380 container_of(work, struct fjes_adapter, unshare_watch_task);
1381
1382 struct net_device *netdev = adapter->netdev;
1383 struct fjes_hw *hw = &adapter->hw;
1384
1385 int unshare_watch, unshare_reserve;
1386 int max_epid, my_epid, epidx;
1387 int stop_req, stop_req_done;
1388 ulong unshare_watch_bitmask;
1389 unsigned long flags;
1390 int wait_time = 0;
1391 int is_shared;
1392 int ret;
1393
1394 my_epid = hw->my_epid;
1395 max_epid = hw->max_epid;
1396
1397 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1398 adapter->unshare_watch_bitmask = 0;
1399
1400 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1401 (wait_time < 3000)) {
1402 for (epidx = 0; epidx < max_epid; epidx++) {
1403 if (epidx == my_epid)
1404 continue;
1405
1406 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1407 epidx);
1408
1409 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1410
1411 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1412 FJES_RX_STOP_REQ_DONE;
1413
1414 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1415
1416 unshare_reserve = test_bit(epidx,
1417 &hw->hw_info.buffer_unshare_reserve_bit);
1418
1419 if ((!stop_req ||
1420 (is_shared && (!is_shared || !stop_req_done))) &&
1421 (is_shared || !unshare_watch || !unshare_reserve))
1422 continue;
1423
1424 mutex_lock(&hw->hw_info.lock);
1425 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1426 switch (ret) {
1427 case 0:
1428 break;
1429 case -ENOMSG:
1430 case -EBUSY:
1431 default:
1432 if (!work_pending(
1433 &adapter->force_close_task)) {
1434 adapter->force_reset = true;
1435 schedule_work(
1436 &adapter->force_close_task);
1437 }
1438 break;
1439 }
1440 mutex_unlock(&hw->hw_info.lock);
1441 hw->ep_shm_info[epidx].ep_stats
1442 .com_unregist_buf_exec += 1;
1443
1444 spin_lock_irqsave(&hw->rx_status_lock, flags);
1445 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1446 netdev->dev_addr, netdev->mtu);
1447 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1448
1449 clear_bit(epidx, &hw->txrx_stop_req_bit);
1450 clear_bit(epidx, &unshare_watch_bitmask);
1451 clear_bit(epidx,
1452 &hw->hw_info.buffer_unshare_reserve_bit);
1453 }
1454
1455 msleep(100);
1456 wait_time += 100;
1457 }
1458
1459 if (hw->hw_info.buffer_unshare_reserve_bit) {
1460 for (epidx = 0; epidx < max_epid; epidx++) {
1461 if (epidx == my_epid)
1462 continue;
1463
1464 if (test_bit(epidx,
1465 &hw->hw_info.buffer_unshare_reserve_bit)) {
1466 mutex_lock(&hw->hw_info.lock);
1467
1468 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1469 switch (ret) {
1470 case 0:
1471 break;
1472 case -ENOMSG:
1473 case -EBUSY:
1474 default:
1475 if (!work_pending(
1476 &adapter->force_close_task)) {
1477 adapter->force_reset = true;
1478 schedule_work(
1479 &adapter->force_close_task);
1480 }
1481 break;
1482 }
1483 mutex_unlock(&hw->hw_info.lock);
1484
1485 hw->ep_shm_info[epidx].ep_stats
1486 .com_unregist_buf_exec += 1;
1487
1488 spin_lock_irqsave(&hw->rx_status_lock, flags);
1489 fjes_hw_setup_epbuf(
1490 &hw->ep_shm_info[epidx].tx,
1491 netdev->dev_addr, netdev->mtu);
1492 spin_unlock_irqrestore(&hw->rx_status_lock,
1493 flags);
1494
1495 clear_bit(epidx, &hw->txrx_stop_req_bit);
1496 clear_bit(epidx, &unshare_watch_bitmask);
1497 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1498 }
1499
1500 if (test_bit(epidx, &unshare_watch_bitmask)) {
1501 spin_lock_irqsave(&hw->rx_status_lock, flags);
1502 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1503 ~FJES_RX_STOP_REQ_DONE;
1504 spin_unlock_irqrestore(&hw->rx_status_lock,
1505 flags);
1506 }
1507 }
1508 }
1509}
1510
1511static acpi_status
1512acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1513 void *context, void **return_value)
1514{
1515 struct acpi_device *device;
1516 bool *found = context;
1517 int result;
1518
1519 result = acpi_bus_get_device(obj_handle, &device);
1520 if (result)
1521 return AE_OK;
1522
1523 if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1524 return AE_OK;
1525
1526 if (!is_extended_socket_device(device))
1527 return AE_OK;
1528
1529 if (acpi_check_extended_socket_status(device))
1530 return AE_OK;
1531
1532 *found = true;
1533 return AE_CTRL_TERMINATE;
1534}
1535
1536
1537static int __init fjes_init_module(void)
1538{
1539 bool found = false;
1540 int result;
1541
1542 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1543 acpi_find_extended_socket_device, NULL, &found,
1544 NULL);
1545
1546 if (!found)
1547 return -ENODEV;
1548
1549 pr_info("%s - version %s - %s\n",
1550 fjes_driver_string, fjes_driver_version, fjes_copyright);
1551
1552 fjes_dbg_init();
1553
1554 result = platform_driver_register(&fjes_driver);
1555 if (result < 0) {
1556 fjes_dbg_exit();
1557 return result;
1558 }
1559
1560 result = acpi_bus_register_driver(&fjes_acpi_driver);
1561 if (result < 0)
1562 goto fail_acpi_driver;
1563
1564 return 0;
1565
1566fail_acpi_driver:
1567 platform_driver_unregister(&fjes_driver);
1568 fjes_dbg_exit();
1569 return result;
1570}
1571
1572module_init(fjes_init_module);
1573
1574
1575static void __exit fjes_exit_module(void)
1576{
1577 acpi_bus_unregister_driver(&fjes_acpi_driver);
1578 platform_driver_unregister(&fjes_driver);
1579 fjes_dbg_exit();
1580}
1581
1582module_exit(fjes_exit_module);
1583
