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