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vfio/pci: Fix typos in comments
[deliverable/linux.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
31 #define MAJ 1
32 #define MIN 1
33 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
34 #define DRV_NAME "fjes"
35 char fjes_driver_name[] = DRV_NAME;
36 char fjes_driver_version[] = DRV_VERSION;
37 static const char fjes_driver_string[] =
38 "FUJITSU Extended Socket Network Device Driver";
39 static const char fjes_copyright[] =
40 "Copyright (c) 2015 FUJITSU LIMITED";
41
42 MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
43 MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
44 MODULE_LICENSE("GPL");
45 MODULE_VERSION(DRV_VERSION);
46
47 static int fjes_request_irq(struct fjes_adapter *);
48 static void fjes_free_irq(struct fjes_adapter *);
49
50 static int fjes_open(struct net_device *);
51 static int fjes_close(struct net_device *);
52 static int fjes_setup_resources(struct fjes_adapter *);
53 static void fjes_free_resources(struct fjes_adapter *);
54 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
55 static void fjes_raise_intr_rxdata_task(struct work_struct *);
56 static void fjes_tx_stall_task(struct work_struct *);
57 static void fjes_force_close_task(struct work_struct *);
58 static irqreturn_t fjes_intr(int, void*);
59 static struct rtnl_link_stats64 *
60 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 .owner = THIS_MODULE,
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 }
371 }
372
373 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
374
375 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
376 if (epidx == hw->my_epid)
377 continue;
378
379 buf_pair = &hw->ep_shm_info[epidx];
380
381 spin_lock_irqsave(&hw->rx_status_lock, flags);
382 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
383 netdev->mtu);
384 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
385
386 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
387 mutex_lock(&hw->hw_info.lock);
388 result =
389 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
390 mutex_unlock(&hw->hw_info.lock);
391
392 switch (result) {
393 case 0:
394 break;
395 case -ENOMSG:
396 case -EBUSY:
397 default:
398 adapter->force_reset = true;
399 return result;
400 }
401 }
402 }
403
404 return 0;
405 }
406
407 static void fjes_free_resources(struct fjes_adapter *adapter)
408 {
409 struct net_device *netdev = adapter->netdev;
410 struct fjes_device_command_param param;
411 struct ep_share_mem_info *buf_pair;
412 struct fjes_hw *hw = &adapter->hw;
413 bool reset_flag = false;
414 unsigned long flags;
415 int result;
416 int epidx;
417
418 for (epidx = 0; epidx < hw->max_epid; epidx++) {
419 if (epidx == hw->my_epid)
420 continue;
421
422 mutex_lock(&hw->hw_info.lock);
423 result = fjes_hw_unregister_buff_addr(hw, epidx);
424 mutex_unlock(&hw->hw_info.lock);
425
426 if (result)
427 reset_flag = true;
428
429 buf_pair = &hw->ep_shm_info[epidx];
430
431 spin_lock_irqsave(&hw->rx_status_lock, flags);
432 fjes_hw_setup_epbuf(&buf_pair->tx,
433 netdev->dev_addr, netdev->mtu);
434 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
435
436 clear_bit(epidx, &hw->txrx_stop_req_bit);
437 }
438
439 if (reset_flag || adapter->force_reset) {
440 result = fjes_hw_reset(hw);
441
442 adapter->force_reset = false;
443
444 if (result)
445 adapter->open_guard = true;
446
447 hw->hw_info.buffer_share_bit = 0;
448
449 memset((void *)&param, 0, sizeof(param));
450
451 param.req_len = hw->hw_info.req_buf_size;
452 param.req_start = __pa(hw->hw_info.req_buf);
453 param.res_len = hw->hw_info.res_buf_size;
454 param.res_start = __pa(hw->hw_info.res_buf);
455 param.share_start = __pa(hw->hw_info.share->ep_status);
456
457 fjes_hw_init_command_registers(hw, &param);
458 }
459 }
460
461 static void fjes_tx_stall_task(struct work_struct *work)
462 {
463 struct fjes_adapter *adapter = container_of(work,
464 struct fjes_adapter, tx_stall_task);
465 struct net_device *netdev = adapter->netdev;
466 struct fjes_hw *hw = &adapter->hw;
467 int all_queue_available, sendable;
468 enum ep_partner_status pstatus;
469 int max_epid, my_epid, epid;
470 union ep_buffer_info *info;
471 int i;
472
473 if (((long)jiffies -
474 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
475 netif_wake_queue(netdev);
476 return;
477 }
478
479 my_epid = hw->my_epid;
480 max_epid = hw->max_epid;
481
482 for (i = 0; i < 5; i++) {
483 all_queue_available = 1;
484
485 for (epid = 0; epid < max_epid; epid++) {
486 if (my_epid == epid)
487 continue;
488
489 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
490 sendable = (pstatus == EP_PARTNER_SHARED);
491 if (!sendable)
492 continue;
493
494 info = adapter->hw.ep_shm_info[epid].tx.info;
495
496 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
497 return;
498
499 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
500 info->v1i.count_max)) {
501 all_queue_available = 0;
502 break;
503 }
504 }
505
506 if (all_queue_available) {
507 netif_wake_queue(netdev);
508 return;
509 }
510 }
511
512 usleep_range(50, 100);
513
514 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
515 }
516
517 static void fjes_force_close_task(struct work_struct *work)
518 {
519 struct fjes_adapter *adapter = container_of(work,
520 struct fjes_adapter, force_close_task);
521 struct net_device *netdev = adapter->netdev;
522
523 rtnl_lock();
524 dev_close(netdev);
525 rtnl_unlock();
526 }
527
528 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
529 {
530 struct fjes_adapter *adapter = container_of(work,
531 struct fjes_adapter, raise_intr_rxdata_task);
532 struct fjes_hw *hw = &adapter->hw;
533 enum ep_partner_status pstatus;
534 int max_epid, my_epid, epid;
535
536 my_epid = hw->my_epid;
537 max_epid = hw->max_epid;
538
539 for (epid = 0; epid < max_epid; epid++)
540 hw->ep_shm_info[epid].tx_status_work = 0;
541
542 for (epid = 0; epid < max_epid; epid++) {
543 if (epid == my_epid)
544 continue;
545
546 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
547 if (pstatus == EP_PARTNER_SHARED) {
548 hw->ep_shm_info[epid].tx_status_work =
549 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
550
551 if (hw->ep_shm_info[epid].tx_status_work ==
552 FJES_TX_DELAY_SEND_PENDING) {
553 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
554 FJES_TX_DELAY_SEND_NONE;
555 }
556 }
557 }
558
559 for (epid = 0; epid < max_epid; epid++) {
560 if (epid == my_epid)
561 continue;
562
563 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
564 if ((hw->ep_shm_info[epid].tx_status_work ==
565 FJES_TX_DELAY_SEND_PENDING) &&
566 (pstatus == EP_PARTNER_SHARED) &&
567 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
568 FJES_RX_POLL_WORK)) {
569 fjes_hw_raise_interrupt(hw, epid,
570 REG_ICTL_MASK_RX_DATA);
571 }
572 }
573
574 usleep_range(500, 1000);
575 }
576
577 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
578 void *data, size_t len)
579 {
580 int retval;
581
582 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
583 data, len);
584 if (retval)
585 return retval;
586
587 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
588 FJES_TX_DELAY_SEND_PENDING;
589 if (!work_pending(&adapter->raise_intr_rxdata_task))
590 queue_work(adapter->txrx_wq,
591 &adapter->raise_intr_rxdata_task);
592
593 retval = 0;
594 return retval;
595 }
596
597 static netdev_tx_t
598 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
599 {
600 struct fjes_adapter *adapter = netdev_priv(netdev);
601 struct fjes_hw *hw = &adapter->hw;
602
603 int max_epid, my_epid, dest_epid;
604 enum ep_partner_status pstatus;
605 struct netdev_queue *cur_queue;
606 char shortpkt[VLAN_ETH_HLEN];
607 bool is_multi, vlan;
608 struct ethhdr *eth;
609 u16 queue_no = 0;
610 u16 vlan_id = 0;
611 netdev_tx_t ret;
612 char *data;
613 int len;
614
615 ret = NETDEV_TX_OK;
616 is_multi = false;
617 cur_queue = netdev_get_tx_queue(netdev, queue_no);
618
619 eth = (struct ethhdr *)skb->data;
620 my_epid = hw->my_epid;
621
622 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
623
624 data = skb->data;
625 len = skb->len;
626
627 if (is_multicast_ether_addr(eth->h_dest)) {
628 dest_epid = 0;
629 max_epid = hw->max_epid;
630 is_multi = true;
631 } else if (is_local_ether_addr(eth->h_dest)) {
632 dest_epid = eth->h_dest[ETH_ALEN - 1];
633 max_epid = dest_epid + 1;
634
635 if ((eth->h_dest[0] == 0x02) &&
636 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
637 eth->h_dest[3] | eth->h_dest[4])) &&
638 (dest_epid < hw->max_epid)) {
639 ;
640 } else {
641 dest_epid = 0;
642 max_epid = 0;
643 ret = NETDEV_TX_OK;
644
645 adapter->stats64.tx_packets += 1;
646 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
647 adapter->stats64.tx_bytes += len;
648 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
649 }
650 } else {
651 dest_epid = 0;
652 max_epid = 0;
653 ret = NETDEV_TX_OK;
654
655 adapter->stats64.tx_packets += 1;
656 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
657 adapter->stats64.tx_bytes += len;
658 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
659 }
660
661 for (; dest_epid < max_epid; dest_epid++) {
662 if (my_epid == dest_epid)
663 continue;
664
665 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
666 if (pstatus != EP_PARTNER_SHARED) {
667 ret = NETDEV_TX_OK;
668 } else if (!fjes_hw_check_epbuf_version(
669 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
670 /* version is NOT 0 */
671 adapter->stats64.tx_carrier_errors += 1;
672 hw->ep_shm_info[dest_epid].net_stats
673 .tx_carrier_errors += 1;
674
675 ret = NETDEV_TX_OK;
676 } else if (!fjes_hw_check_mtu(
677 &adapter->hw.ep_shm_info[dest_epid].rx,
678 netdev->mtu)) {
679 adapter->stats64.tx_dropped += 1;
680 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
681 adapter->stats64.tx_errors += 1;
682 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
683
684 ret = NETDEV_TX_OK;
685 } else if (vlan &&
686 !fjes_hw_check_vlan_id(
687 &adapter->hw.ep_shm_info[dest_epid].rx,
688 vlan_id)) {
689 ret = NETDEV_TX_OK;
690 } else {
691 if (len < VLAN_ETH_HLEN) {
692 memset(shortpkt, 0, VLAN_ETH_HLEN);
693 memcpy(shortpkt, skb->data, skb->len);
694 len = VLAN_ETH_HLEN;
695 data = shortpkt;
696 }
697
698 if (adapter->tx_retry_count == 0) {
699 adapter->tx_start_jiffies = jiffies;
700 adapter->tx_retry_count = 1;
701 } else {
702 adapter->tx_retry_count++;
703 }
704
705 if (fjes_tx_send(adapter, dest_epid, data, len)) {
706 if (is_multi) {
707 ret = NETDEV_TX_OK;
708 } else if (
709 ((long)jiffies -
710 (long)adapter->tx_start_jiffies) >=
711 FJES_TX_RETRY_TIMEOUT) {
712 adapter->stats64.tx_fifo_errors += 1;
713 hw->ep_shm_info[dest_epid].net_stats
714 .tx_fifo_errors += 1;
715 adapter->stats64.tx_errors += 1;
716 hw->ep_shm_info[dest_epid].net_stats
717 .tx_errors += 1;
718
719 ret = NETDEV_TX_OK;
720 } else {
721 netif_trans_update(netdev);
722 netif_tx_stop_queue(cur_queue);
723
724 if (!work_pending(&adapter->tx_stall_task))
725 queue_work(adapter->txrx_wq,
726 &adapter->tx_stall_task);
727
728 ret = NETDEV_TX_BUSY;
729 }
730 } else {
731 if (!is_multi) {
732 adapter->stats64.tx_packets += 1;
733 hw->ep_shm_info[dest_epid].net_stats
734 .tx_packets += 1;
735 adapter->stats64.tx_bytes += len;
736 hw->ep_shm_info[dest_epid].net_stats
737 .tx_bytes += len;
738 }
739
740 adapter->tx_retry_count = 0;
741 ret = NETDEV_TX_OK;
742 }
743 }
744 }
745
746 if (ret == NETDEV_TX_OK) {
747 dev_kfree_skb(skb);
748 if (is_multi) {
749 adapter->stats64.tx_packets += 1;
750 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
751 adapter->stats64.tx_bytes += 1;
752 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
753 }
754 }
755
756 return ret;
757 }
758
759 static void fjes_tx_retry(struct net_device *netdev)
760 {
761 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
762
763 netif_tx_wake_queue(queue);
764 }
765
766 static struct rtnl_link_stats64 *
767 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
768 {
769 struct fjes_adapter *adapter = netdev_priv(netdev);
770
771 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
772
773 return stats;
774 }
775
776 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
777 {
778 struct fjes_adapter *adapter = netdev_priv(netdev);
779 bool running = netif_running(netdev);
780 struct fjes_hw *hw = &adapter->hw;
781 unsigned long flags;
782 int ret = -EINVAL;
783 int idx, epidx;
784
785 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
786 if (new_mtu <= fjes_support_mtu[idx]) {
787 new_mtu = fjes_support_mtu[idx];
788 if (new_mtu == netdev->mtu)
789 return 0;
790
791 ret = 0;
792 break;
793 }
794 }
795
796 if (ret)
797 return ret;
798
799 if (running) {
800 spin_lock_irqsave(&hw->rx_status_lock, flags);
801 for (epidx = 0; epidx < hw->max_epid; epidx++) {
802 if (epidx == hw->my_epid)
803 continue;
804 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
805 ~FJES_RX_MTU_CHANGING_DONE;
806 }
807 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
808
809 netif_tx_stop_all_queues(netdev);
810 netif_carrier_off(netdev);
811 cancel_work_sync(&adapter->tx_stall_task);
812 napi_disable(&adapter->napi);
813
814 msleep(1000);
815
816 netif_tx_stop_all_queues(netdev);
817 }
818
819 netdev->mtu = new_mtu;
820
821 if (running) {
822 for (epidx = 0; epidx < hw->max_epid; epidx++) {
823 if (epidx == hw->my_epid)
824 continue;
825
826 spin_lock_irqsave(&hw->rx_status_lock, flags);
827 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
828 netdev->dev_addr,
829 netdev->mtu);
830
831 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
832 FJES_RX_MTU_CHANGING_DONE;
833 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
834 }
835
836 netif_tx_wake_all_queues(netdev);
837 netif_carrier_on(netdev);
838 napi_enable(&adapter->napi);
839 napi_schedule(&adapter->napi);
840 }
841
842 return ret;
843 }
844
845 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
846 __be16 proto, u16 vid)
847 {
848 struct fjes_adapter *adapter = netdev_priv(netdev);
849 bool ret = true;
850 int epid;
851
852 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
853 if (epid == adapter->hw.my_epid)
854 continue;
855
856 if (!fjes_hw_check_vlan_id(
857 &adapter->hw.ep_shm_info[epid].tx, vid))
858 ret = fjes_hw_set_vlan_id(
859 &adapter->hw.ep_shm_info[epid].tx, vid);
860 }
861
862 return ret ? 0 : -ENOSPC;
863 }
864
865 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
866 __be16 proto, u16 vid)
867 {
868 struct fjes_adapter *adapter = netdev_priv(netdev);
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 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
876 }
877
878 return 0;
879 }
880
881 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
882 int src_epid)
883 {
884 struct fjes_hw *hw = &adapter->hw;
885 enum ep_partner_status status;
886 unsigned long flags;
887
888 status = fjes_hw_get_partner_ep_status(hw, src_epid);
889 switch (status) {
890 case EP_PARTNER_UNSHARE:
891 case EP_PARTNER_COMPLETE:
892 default:
893 break;
894 case EP_PARTNER_WAITING:
895 if (src_epid < hw->my_epid) {
896 spin_lock_irqsave(&hw->rx_status_lock, flags);
897 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
898 FJES_RX_STOP_REQ_DONE;
899 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
900
901 clear_bit(src_epid, &hw->txrx_stop_req_bit);
902 set_bit(src_epid, &adapter->unshare_watch_bitmask);
903
904 if (!work_pending(&adapter->unshare_watch_task))
905 queue_work(adapter->control_wq,
906 &adapter->unshare_watch_task);
907 }
908 break;
909 case EP_PARTNER_SHARED:
910 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
911 FJES_RX_STOP_REQ_REQUEST) {
912 set_bit(src_epid, &hw->epstop_req_bit);
913 if (!work_pending(&hw->epstop_task))
914 queue_work(adapter->control_wq,
915 &hw->epstop_task);
916 }
917 break;
918 }
919 }
920
921 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
922 {
923 struct fjes_hw *hw = &adapter->hw;
924 enum ep_partner_status status;
925 unsigned long flags;
926
927 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
928
929 status = fjes_hw_get_partner_ep_status(hw, src_epid);
930 switch (status) {
931 case EP_PARTNER_WAITING:
932 spin_lock_irqsave(&hw->rx_status_lock, flags);
933 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
934 FJES_RX_STOP_REQ_DONE;
935 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
936 clear_bit(src_epid, &hw->txrx_stop_req_bit);
937 /* fall through */
938 case EP_PARTNER_UNSHARE:
939 case EP_PARTNER_COMPLETE:
940 default:
941 set_bit(src_epid, &adapter->unshare_watch_bitmask);
942 if (!work_pending(&adapter->unshare_watch_task))
943 queue_work(adapter->control_wq,
944 &adapter->unshare_watch_task);
945 break;
946 case EP_PARTNER_SHARED:
947 set_bit(src_epid, &hw->epstop_req_bit);
948
949 if (!work_pending(&hw->epstop_task))
950 queue_work(adapter->control_wq, &hw->epstop_task);
951 break;
952 }
953 }
954
955 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
956 int src_epid)
957 {
958 struct fjes_hw *hw = &adapter->hw;
959
960 if (!work_pending(&hw->update_zone_task))
961 queue_work(adapter->control_wq, &hw->update_zone_task);
962 }
963
964 static irqreturn_t fjes_intr(int irq, void *data)
965 {
966 struct fjes_adapter *adapter = data;
967 struct fjes_hw *hw = &adapter->hw;
968 irqreturn_t ret;
969 u32 icr;
970
971 icr = fjes_hw_capture_interrupt_status(hw);
972
973 if (icr & REG_IS_MASK_IS_ASSERT) {
974 if (icr & REG_ICTL_MASK_RX_DATA)
975 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
976
977 if (icr & REG_ICTL_MASK_DEV_STOP_REQ)
978 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
979
980 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ)
981 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
982
983 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
984 fjes_hw_set_irqmask(hw,
985 REG_ICTL_MASK_TXRX_STOP_DONE, true);
986
987 if (icr & REG_ICTL_MASK_INFO_UPDATE)
988 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
989
990 ret = IRQ_HANDLED;
991 } else {
992 ret = IRQ_NONE;
993 }
994
995 return ret;
996 }
997
998 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
999 int start_epid)
1000 {
1001 struct fjes_hw *hw = &adapter->hw;
1002 enum ep_partner_status pstatus;
1003 int max_epid, cur_epid;
1004 int i;
1005
1006 max_epid = hw->max_epid;
1007 start_epid = (start_epid + 1 + max_epid) % max_epid;
1008
1009 for (i = 0; i < max_epid; i++) {
1010 cur_epid = (start_epid + i) % max_epid;
1011 if (cur_epid == hw->my_epid)
1012 continue;
1013
1014 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1015 if (pstatus == EP_PARTNER_SHARED) {
1016 if (!fjes_hw_epbuf_rx_is_empty(
1017 &hw->ep_shm_info[cur_epid].rx))
1018 return cur_epid;
1019 }
1020 }
1021 return -1;
1022 }
1023
1024 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1025 int *cur_epid)
1026 {
1027 void *frame;
1028
1029 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1030 if (*cur_epid < 0)
1031 return NULL;
1032
1033 frame =
1034 fjes_hw_epbuf_rx_curpkt_get_addr(
1035 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1036
1037 return frame;
1038 }
1039
1040 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1041 {
1042 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1043 }
1044
1045 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1046 {
1047 struct fjes_hw *hw = &adapter->hw;
1048
1049 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1050
1051 adapter->unset_rx_last = true;
1052 napi_schedule(&adapter->napi);
1053 }
1054
1055 static int fjes_poll(struct napi_struct *napi, int budget)
1056 {
1057 struct fjes_adapter *adapter =
1058 container_of(napi, struct fjes_adapter, napi);
1059 struct net_device *netdev = napi->dev;
1060 struct fjes_hw *hw = &adapter->hw;
1061 struct sk_buff *skb;
1062 int work_done = 0;
1063 int cur_epid = 0;
1064 int epidx;
1065 size_t frame_len;
1066 void *frame;
1067
1068 spin_lock(&hw->rx_status_lock);
1069 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1070 if (epidx == hw->my_epid)
1071 continue;
1072
1073 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1074 EP_PARTNER_SHARED)
1075 adapter->hw.ep_shm_info[epidx]
1076 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1077 }
1078 spin_unlock(&hw->rx_status_lock);
1079
1080 while (work_done < budget) {
1081 prefetch(&adapter->hw);
1082 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1083
1084 if (frame) {
1085 skb = napi_alloc_skb(napi, frame_len);
1086 if (!skb) {
1087 adapter->stats64.rx_dropped += 1;
1088 hw->ep_shm_info[cur_epid].net_stats
1089 .rx_dropped += 1;
1090 adapter->stats64.rx_errors += 1;
1091 hw->ep_shm_info[cur_epid].net_stats
1092 .rx_errors += 1;
1093 } else {
1094 memcpy(skb_put(skb, frame_len),
1095 frame, frame_len);
1096 skb->protocol = eth_type_trans(skb, netdev);
1097 skb->ip_summed = CHECKSUM_UNNECESSARY;
1098
1099 netif_receive_skb(skb);
1100
1101 work_done++;
1102
1103 adapter->stats64.rx_packets += 1;
1104 hw->ep_shm_info[cur_epid].net_stats
1105 .rx_packets += 1;
1106 adapter->stats64.rx_bytes += frame_len;
1107 hw->ep_shm_info[cur_epid].net_stats
1108 .rx_bytes += frame_len;
1109
1110 if (is_multicast_ether_addr(
1111 ((struct ethhdr *)frame)->h_dest)) {
1112 adapter->stats64.multicast += 1;
1113 hw->ep_shm_info[cur_epid].net_stats
1114 .multicast += 1;
1115 }
1116 }
1117
1118 fjes_rxframe_release(adapter, cur_epid);
1119 adapter->unset_rx_last = true;
1120 } else {
1121 break;
1122 }
1123 }
1124
1125 if (work_done < budget) {
1126 napi_complete(napi);
1127
1128 if (adapter->unset_rx_last) {
1129 adapter->rx_last_jiffies = jiffies;
1130 adapter->unset_rx_last = false;
1131 }
1132
1133 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1134 napi_reschedule(napi);
1135 } else {
1136 spin_lock(&hw->rx_status_lock);
1137 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1138 if (epidx == hw->my_epid)
1139 continue;
1140 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1141 EP_PARTNER_SHARED)
1142 adapter->hw.ep_shm_info[epidx].tx
1143 .info->v1i.rx_status &=
1144 ~FJES_RX_POLL_WORK;
1145 }
1146 spin_unlock(&hw->rx_status_lock);
1147
1148 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1149 }
1150 }
1151
1152 return work_done;
1153 }
1154
1155 /* fjes_probe - Device Initialization Routine */
1156 static int fjes_probe(struct platform_device *plat_dev)
1157 {
1158 struct fjes_adapter *adapter;
1159 struct net_device *netdev;
1160 struct resource *res;
1161 struct fjes_hw *hw;
1162 int err;
1163
1164 err = -ENOMEM;
1165 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1166 NET_NAME_UNKNOWN, fjes_netdev_setup,
1167 FJES_MAX_QUEUES);
1168
1169 if (!netdev)
1170 goto err_out;
1171
1172 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1173
1174 dev_set_drvdata(&plat_dev->dev, netdev);
1175 adapter = netdev_priv(netdev);
1176 adapter->netdev = netdev;
1177 adapter->plat_dev = plat_dev;
1178 hw = &adapter->hw;
1179 hw->back = adapter;
1180
1181 /* setup the private structure */
1182 err = fjes_sw_init(adapter);
1183 if (err)
1184 goto err_free_netdev;
1185
1186 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1187 adapter->force_reset = false;
1188 adapter->open_guard = false;
1189
1190 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1191 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1192 WQ_MEM_RECLAIM, 0);
1193
1194 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1195 INIT_WORK(&adapter->raise_intr_rxdata_task,
1196 fjes_raise_intr_rxdata_task);
1197 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1198 adapter->unshare_watch_bitmask = 0;
1199
1200 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1201 adapter->interrupt_watch_enable = false;
1202
1203 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1204 hw->hw_res.start = res->start;
1205 hw->hw_res.size = resource_size(res);
1206 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1207 err = fjes_hw_init(&adapter->hw);
1208 if (err)
1209 goto err_free_netdev;
1210
1211 /* setup MAC address (02:00:00:00:00:[epid])*/
1212 netdev->dev_addr[0] = 2;
1213 netdev->dev_addr[1] = 0;
1214 netdev->dev_addr[2] = 0;
1215 netdev->dev_addr[3] = 0;
1216 netdev->dev_addr[4] = 0;
1217 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1218
1219 err = register_netdev(netdev);
1220 if (err)
1221 goto err_hw_exit;
1222
1223 netif_carrier_off(netdev);
1224
1225 return 0;
1226
1227 err_hw_exit:
1228 fjes_hw_exit(&adapter->hw);
1229 err_free_netdev:
1230 free_netdev(netdev);
1231 err_out:
1232 return err;
1233 }
1234
1235 /* fjes_remove - Device Removal Routine */
1236 static int fjes_remove(struct platform_device *plat_dev)
1237 {
1238 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1239 struct fjes_adapter *adapter = netdev_priv(netdev);
1240 struct fjes_hw *hw = &adapter->hw;
1241
1242 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1243 cancel_work_sync(&adapter->unshare_watch_task);
1244 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1245 cancel_work_sync(&adapter->tx_stall_task);
1246 if (adapter->control_wq)
1247 destroy_workqueue(adapter->control_wq);
1248 if (adapter->txrx_wq)
1249 destroy_workqueue(adapter->txrx_wq);
1250
1251 unregister_netdev(netdev);
1252
1253 fjes_hw_exit(hw);
1254
1255 netif_napi_del(&adapter->napi);
1256
1257 free_netdev(netdev);
1258
1259 return 0;
1260 }
1261
1262 static int fjes_sw_init(struct fjes_adapter *adapter)
1263 {
1264 struct net_device *netdev = adapter->netdev;
1265
1266 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1267
1268 return 0;
1269 }
1270
1271 /* fjes_netdev_setup - netdevice initialization routine */
1272 static void fjes_netdev_setup(struct net_device *netdev)
1273 {
1274 ether_setup(netdev);
1275
1276 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1277 netdev->netdev_ops = &fjes_netdev_ops;
1278 fjes_set_ethtool_ops(netdev);
1279 netdev->mtu = fjes_support_mtu[3];
1280 netdev->flags |= IFF_BROADCAST;
1281 netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
1282 }
1283
1284 static void fjes_irq_watch_task(struct work_struct *work)
1285 {
1286 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1287 struct fjes_adapter, interrupt_watch_task);
1288
1289 local_irq_disable();
1290 fjes_intr(adapter->hw.hw_res.irq, adapter);
1291 local_irq_enable();
1292
1293 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1294 napi_schedule(&adapter->napi);
1295
1296 if (adapter->interrupt_watch_enable) {
1297 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1298 queue_delayed_work(adapter->control_wq,
1299 &adapter->interrupt_watch_task,
1300 FJES_IRQ_WATCH_DELAY);
1301 }
1302 }
1303
1304 static void fjes_watch_unshare_task(struct work_struct *work)
1305 {
1306 struct fjes_adapter *adapter =
1307 container_of(work, struct fjes_adapter, unshare_watch_task);
1308
1309 struct net_device *netdev = adapter->netdev;
1310 struct fjes_hw *hw = &adapter->hw;
1311
1312 int unshare_watch, unshare_reserve;
1313 int max_epid, my_epid, epidx;
1314 int stop_req, stop_req_done;
1315 ulong unshare_watch_bitmask;
1316 unsigned long flags;
1317 int wait_time = 0;
1318 int is_shared;
1319 int ret;
1320
1321 my_epid = hw->my_epid;
1322 max_epid = hw->max_epid;
1323
1324 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1325 adapter->unshare_watch_bitmask = 0;
1326
1327 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1328 (wait_time < 3000)) {
1329 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1330 if (epidx == hw->my_epid)
1331 continue;
1332
1333 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1334 epidx);
1335
1336 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1337
1338 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1339 FJES_RX_STOP_REQ_DONE;
1340
1341 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1342
1343 unshare_reserve = test_bit(epidx,
1344 &hw->hw_info.buffer_unshare_reserve_bit);
1345
1346 if ((!stop_req ||
1347 (is_shared && (!is_shared || !stop_req_done))) &&
1348 (is_shared || !unshare_watch || !unshare_reserve))
1349 continue;
1350
1351 mutex_lock(&hw->hw_info.lock);
1352 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1353 switch (ret) {
1354 case 0:
1355 break;
1356 case -ENOMSG:
1357 case -EBUSY:
1358 default:
1359 if (!work_pending(
1360 &adapter->force_close_task)) {
1361 adapter->force_reset = true;
1362 schedule_work(
1363 &adapter->force_close_task);
1364 }
1365 break;
1366 }
1367 mutex_unlock(&hw->hw_info.lock);
1368
1369 spin_lock_irqsave(&hw->rx_status_lock, flags);
1370 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1371 netdev->dev_addr, netdev->mtu);
1372 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1373
1374 clear_bit(epidx, &hw->txrx_stop_req_bit);
1375 clear_bit(epidx, &unshare_watch_bitmask);
1376 clear_bit(epidx,
1377 &hw->hw_info.buffer_unshare_reserve_bit);
1378 }
1379
1380 msleep(100);
1381 wait_time += 100;
1382 }
1383
1384 if (hw->hw_info.buffer_unshare_reserve_bit) {
1385 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1386 if (epidx == hw->my_epid)
1387 continue;
1388
1389 if (test_bit(epidx,
1390 &hw->hw_info.buffer_unshare_reserve_bit)) {
1391 mutex_lock(&hw->hw_info.lock);
1392
1393 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1394 switch (ret) {
1395 case 0:
1396 break;
1397 case -ENOMSG:
1398 case -EBUSY:
1399 default:
1400 if (!work_pending(
1401 &adapter->force_close_task)) {
1402 adapter->force_reset = true;
1403 schedule_work(
1404 &adapter->force_close_task);
1405 }
1406 break;
1407 }
1408 mutex_unlock(&hw->hw_info.lock);
1409
1410 spin_lock_irqsave(&hw->rx_status_lock, flags);
1411 fjes_hw_setup_epbuf(
1412 &hw->ep_shm_info[epidx].tx,
1413 netdev->dev_addr, netdev->mtu);
1414 spin_unlock_irqrestore(&hw->rx_status_lock,
1415 flags);
1416
1417 clear_bit(epidx, &hw->txrx_stop_req_bit);
1418 clear_bit(epidx, &unshare_watch_bitmask);
1419 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1420 }
1421
1422 if (test_bit(epidx, &unshare_watch_bitmask)) {
1423 spin_lock_irqsave(&hw->rx_status_lock, flags);
1424 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1425 ~FJES_RX_STOP_REQ_DONE;
1426 spin_unlock_irqrestore(&hw->rx_status_lock,
1427 flags);
1428 }
1429 }
1430 }
1431 }
1432
1433 /* fjes_init_module - Driver Registration Routine */
1434 static int __init fjes_init_module(void)
1435 {
1436 int result;
1437
1438 pr_info("%s - version %s - %s\n",
1439 fjes_driver_string, fjes_driver_version, fjes_copyright);
1440
1441 result = platform_driver_register(&fjes_driver);
1442 if (result < 0)
1443 return result;
1444
1445 result = acpi_bus_register_driver(&fjes_acpi_driver);
1446 if (result < 0)
1447 goto fail_acpi_driver;
1448
1449 return 0;
1450
1451 fail_acpi_driver:
1452 platform_driver_unregister(&fjes_driver);
1453 return result;
1454 }
1455
1456 module_init(fjes_init_module);
1457
1458 /* fjes_exit_module - Driver Exit Cleanup Routine */
1459 static void __exit fjes_exit_module(void)
1460 {
1461 acpi_bus_unregister_driver(&fjes_acpi_driver);
1462 platform_driver_unregister(&fjes_driver);
1463 }
1464
1465 module_exit(fjes_exit_module);
Linux kernel - Deliverables
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