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