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