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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / fjes / fjes_main.c
blob8c810edece866dcf2aac96bb57f690cce3ad7bf5
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * FUJITSU Extended Socket Network Device driver
4 * Copyright (c) 2015 FUJITSU LIMITED
5 */
6
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/nls.h>
10 #include <linux/platform_device.h>
11 #include <linux/netdevice.h>
12 #include <linux/interrupt.h>
13
14 #include "fjes.h"
15 #include "fjes_trace.h"
16
17 #define MAJ 1
18 #define MIN 2
19 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
20 #define DRV_NAME "fjes"
21 char fjes_driver_name[] = DRV_NAME;
22 char fjes_driver_version[] = DRV_VERSION;
23 static const char fjes_driver_string[] =
24 "FUJITSU Extended Socket Network Device Driver";
25 static const char fjes_copyright[] =
26 "Copyright (c) 2015 FUJITSU LIMITED";
27
28 MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
29 MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
30 MODULE_LICENSE("GPL");
31 MODULE_VERSION(DRV_VERSION);
32
33 #define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02"
34
35 static int fjes_request_irq(struct fjes_adapter *);
36 static void fjes_free_irq(struct fjes_adapter *);
37
38 static int fjes_open(struct net_device *);
39 static int fjes_close(struct net_device *);
40 static int fjes_setup_resources(struct fjes_adapter *);
41 static void fjes_free_resources(struct fjes_adapter *);
42 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
43 static void fjes_raise_intr_rxdata_task(struct work_struct *);
44 static void fjes_tx_stall_task(struct work_struct *);
45 static void fjes_force_close_task(struct work_struct *);
46 static irqreturn_t fjes_intr(int, void*);
47 static void fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
48 static int fjes_change_mtu(struct net_device *, int);
49 static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
50 static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
51 static void fjes_tx_retry(struct net_device *, unsigned int txqueue);
52
53 static int fjes_acpi_add(struct acpi_device *);
54 static int fjes_acpi_remove(struct acpi_device *);
55 static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
56
57 static int fjes_probe(struct platform_device *);
58 static int fjes_remove(struct platform_device *);
59
60 static int fjes_sw_init(struct fjes_adapter *);
61 static void fjes_netdev_setup(struct net_device *);
62 static void fjes_irq_watch_task(struct work_struct *);
63 static void fjes_watch_unshare_task(struct work_struct *);
64 static void fjes_rx_irq(struct fjes_adapter *, int);
65 static int fjes_poll(struct napi_struct *, int);
66
67 static const struct acpi_device_id fjes_acpi_ids[] = {
68 {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
69 {"", 0},
70 };
71 MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
72
73 static struct acpi_driver fjes_acpi_driver = {
74 .name = DRV_NAME,
75 .class = DRV_NAME,
76 .owner = THIS_MODULE,
77 .ids = fjes_acpi_ids,
78 .ops = {
79 .add = fjes_acpi_add,
80 .remove = fjes_acpi_remove,
81 },
82 };
83
84 static struct platform_driver fjes_driver = {
85 .driver = {
86 .name = DRV_NAME,
87 },
88 .probe = fjes_probe,
89 .remove = fjes_remove,
90 };
91
92 static struct resource fjes_resource[] = {
93 {
94 .flags = IORESOURCE_MEM,
95 .start = 0,
96 .end = 0,
97 },
98 {
99 .flags = IORESOURCE_IRQ,
100 .start = 0,
101 .end = 0,
102 },
103 };
104
105 static bool is_extended_socket_device(struct acpi_device *device)
106 {
107 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
108 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
109 union acpi_object *str;
110 acpi_status status;
111 int result;
112
113 status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
114 if (ACPI_FAILURE(status))
115 return false;
116
117 str = buffer.pointer;
118 result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
119 str->string.length, UTF16_LITTLE_ENDIAN,
120 str_buf, sizeof(str_buf) - 1);
121 str_buf[result] = 0;
122
123 if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
124 kfree(buffer.pointer);
125 return false;
126 }
127 kfree(buffer.pointer);
128
129 return true;
130 }
131
132 static int acpi_check_extended_socket_status(struct acpi_device *device)
133 {
134 unsigned long long sta;
135 acpi_status status;
136
137 status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
138 if (ACPI_FAILURE(status))
139 return -ENODEV;
140
141 if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
142 (sta & ACPI_STA_DEVICE_ENABLED) &&
143 (sta & ACPI_STA_DEVICE_UI) &&
144 (sta & ACPI_STA_DEVICE_FUNCTIONING)))
145 return -ENODEV;
146
147 return 0;
148 }
149
150 static int fjes_acpi_add(struct acpi_device *device)
151 {
152 struct platform_device *plat_dev;
153 acpi_status status;
154
155 if (!is_extended_socket_device(device))
156 return -ENODEV;
157
158 if (acpi_check_extended_socket_status(device))
159 return -ENODEV;
160
161 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
162 fjes_get_acpi_resource, fjes_resource);
163 if (ACPI_FAILURE(status))
164 return -ENODEV;
165
166 /* create platform_device */
167 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
168 ARRAY_SIZE(fjes_resource));
169 if (IS_ERR(plat_dev))
170 return PTR_ERR(plat_dev);
171
172 device->driver_data = plat_dev;
173
174 return 0;
175 }
176
177 static int fjes_acpi_remove(struct acpi_device *device)
178 {
179 struct platform_device *plat_dev;
180
181 plat_dev = (struct platform_device *)acpi_driver_data(device);
182 platform_device_unregister(plat_dev);
183
184 return 0;
185 }
186
187 static acpi_status
188 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
189 {
190 struct acpi_resource_address32 *addr;
191 struct acpi_resource_irq *irq;
192 struct resource *res = data;
193
194 switch (acpi_res->type) {
195 case ACPI_RESOURCE_TYPE_ADDRESS32:
196 addr = &acpi_res->data.address32;
197 res[0].start = addr->address.minimum;
198 res[0].end = addr->address.minimum +
199 addr->address.address_length - 1;
200 break;
201
202 case ACPI_RESOURCE_TYPE_IRQ:
203 irq = &acpi_res->data.irq;
204 if (irq->interrupt_count != 1)
205 return AE_ERROR;
206 res[1].start = irq->interrupts[0];
207 res[1].end = irq->interrupts[0];
208 break;
209
210 default:
211 break;
212 }
213
214 return AE_OK;
215 }
216
217 static int fjes_request_irq(struct fjes_adapter *adapter)
218 {
219 struct net_device *netdev = adapter->netdev;
220 int result = -1;
221
222 adapter->interrupt_watch_enable = true;
223 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
224 queue_delayed_work(adapter->control_wq,
225 &adapter->interrupt_watch_task,
226 FJES_IRQ_WATCH_DELAY);
227 }
228
229 if (!adapter->irq_registered) {
230 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
231 IRQF_SHARED, netdev->name, adapter);
232 if (result)
233 adapter->irq_registered = false;
234 else
235 adapter->irq_registered = true;
236 }
237
238 return result;
239 }
240
241 static void fjes_free_irq(struct fjes_adapter *adapter)
242 {
243 struct fjes_hw *hw = &adapter->hw;
244
245 adapter->interrupt_watch_enable = false;
246 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
247
248 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
249
250 if (adapter->irq_registered) {
251 free_irq(adapter->hw.hw_res.irq, adapter);
252 adapter->irq_registered = false;
253 }
254 }
255
256 static const struct net_device_ops fjes_netdev_ops = {
257 .ndo_open = fjes_open,
258 .ndo_stop = fjes_close,
259 .ndo_start_xmit = fjes_xmit_frame,
260 .ndo_get_stats64 = fjes_get_stats64,
261 .ndo_change_mtu = fjes_change_mtu,
262 .ndo_tx_timeout = fjes_tx_retry,
263 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
264 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
265 };
266
267 /* fjes_open - Called when a network interface is made active */
268 static int fjes_open(struct net_device *netdev)
269 {
270 struct fjes_adapter *adapter = netdev_priv(netdev);
271 struct fjes_hw *hw = &adapter->hw;
272 int result;
273
274 if (adapter->open_guard)
275 return -ENXIO;
276
277 result = fjes_setup_resources(adapter);
278 if (result)
279 goto err_setup_res;
280
281 hw->txrx_stop_req_bit = 0;
282 hw->epstop_req_bit = 0;
283
284 napi_enable(&adapter->napi);
285
286 fjes_hw_capture_interrupt_status(hw);
287
288 result = fjes_request_irq(adapter);
289 if (result)
290 goto err_req_irq;
291
292 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
293
294 netif_tx_start_all_queues(netdev);
295 netif_carrier_on(netdev);
296
297 return 0;
298
299 err_req_irq:
300 fjes_free_irq(adapter);
301 napi_disable(&adapter->napi);
302
303 err_setup_res:
304 fjes_free_resources(adapter);
305 return result;
306 }
307
308 /* fjes_close - Disables a network interface */
309 static int fjes_close(struct net_device *netdev)
310 {
311 struct fjes_adapter *adapter = netdev_priv(netdev);
312 struct fjes_hw *hw = &adapter->hw;
313 unsigned long flags;
314 int epidx;
315
316 netif_tx_stop_all_queues(netdev);
317 netif_carrier_off(netdev);
318
319 fjes_hw_raise_epstop(hw);
320
321 napi_disable(&adapter->napi);
322
323 spin_lock_irqsave(&hw->rx_status_lock, flags);
324 for (epidx = 0; epidx < hw->max_epid; epidx++) {
325 if (epidx == hw->my_epid)
326 continue;
327
328 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
329 EP_PARTNER_SHARED)
330 adapter->hw.ep_shm_info[epidx]
331 .tx.info->v1i.rx_status &=
332 ~FJES_RX_POLL_WORK;
333 }
334 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
335
336 fjes_free_irq(adapter);
337
338 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
339 cancel_work_sync(&adapter->unshare_watch_task);
340 adapter->unshare_watch_bitmask = 0;
341 cancel_work_sync(&adapter->raise_intr_rxdata_task);
342 cancel_work_sync(&adapter->tx_stall_task);
343
344 cancel_work_sync(&hw->update_zone_task);
345 cancel_work_sync(&hw->epstop_task);
346
347 fjes_hw_wait_epstop(hw);
348
349 fjes_free_resources(adapter);
350
351 return 0;
352 }
353
354 static int fjes_setup_resources(struct fjes_adapter *adapter)
355 {
356 struct net_device *netdev = adapter->netdev;
357 struct ep_share_mem_info *buf_pair;
358 struct fjes_hw *hw = &adapter->hw;
359 unsigned long flags;
360 int result;
361 int epidx;
362
363 mutex_lock(&hw->hw_info.lock);
364 result = fjes_hw_request_info(hw);
365 switch (result) {
366 case 0:
367 for (epidx = 0; epidx < hw->max_epid; epidx++) {
368 hw->ep_shm_info[epidx].es_status =
369 hw->hw_info.res_buf->info.info[epidx].es_status;
370 hw->ep_shm_info[epidx].zone =
371 hw->hw_info.res_buf->info.info[epidx].zone;
372 }
373 break;
374 default:
375 case -ENOMSG:
376 case -EBUSY:
377 adapter->force_reset = true;
378
379 mutex_unlock(&hw->hw_info.lock);
380 return result;
381 }
382 mutex_unlock(&hw->hw_info.lock);
383
384 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
385 if ((epidx != hw->my_epid) &&
386 (hw->ep_shm_info[epidx].es_status ==
387 FJES_ZONING_STATUS_ENABLE)) {
388 fjes_hw_raise_interrupt(hw, epidx,
389 REG_ICTL_MASK_INFO_UPDATE);
390 hw->ep_shm_info[epidx].ep_stats
391 .send_intr_zoneupdate += 1;
392 }
393 }
394
395 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
396
397 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
398 if (epidx == hw->my_epid)
399 continue;
400
401 buf_pair = &hw->ep_shm_info[epidx];
402
403 spin_lock_irqsave(&hw->rx_status_lock, flags);
404 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
405 netdev->mtu);
406 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
407
408 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
409 mutex_lock(&hw->hw_info.lock);
410 result =
411 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
412 mutex_unlock(&hw->hw_info.lock);
413
414 switch (result) {
415 case 0:
416 break;
417 case -ENOMSG:
418 case -EBUSY:
419 default:
420 adapter->force_reset = true;
421 return result;
422 }
423
424 hw->ep_shm_info[epidx].ep_stats
425 .com_regist_buf_exec += 1;
426 }
427 }
428
429 return 0;
430 }
431
432 static void fjes_free_resources(struct fjes_adapter *adapter)
433 {
434 struct net_device *netdev = adapter->netdev;
435 struct fjes_device_command_param param;
436 struct ep_share_mem_info *buf_pair;
437 struct fjes_hw *hw = &adapter->hw;
438 bool reset_flag = false;
439 unsigned long flags;
440 int result;
441 int epidx;
442
443 for (epidx = 0; epidx < hw->max_epid; epidx++) {
444 if (epidx == hw->my_epid)
445 continue;
446
447 mutex_lock(&hw->hw_info.lock);
448 result = fjes_hw_unregister_buff_addr(hw, epidx);
449 mutex_unlock(&hw->hw_info.lock);
450
451 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
452
453 if (result)
454 reset_flag = true;
455
456 buf_pair = &hw->ep_shm_info[epidx];
457
458 spin_lock_irqsave(&hw->rx_status_lock, flags);
459 fjes_hw_setup_epbuf(&buf_pair->tx,
460 netdev->dev_addr, netdev->mtu);
461 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
462
463 clear_bit(epidx, &hw->txrx_stop_req_bit);
464 }
465
466 if (reset_flag || adapter->force_reset) {
467 result = fjes_hw_reset(hw);
468
469 adapter->force_reset = false;
470
471 if (result)
472 adapter->open_guard = true;
473
474 hw->hw_info.buffer_share_bit = 0;
475
476 memset((void *)&param, 0, sizeof(param));
477
478 param.req_len = hw->hw_info.req_buf_size;
479 param.req_start = __pa(hw->hw_info.req_buf);
480 param.res_len = hw->hw_info.res_buf_size;
481 param.res_start = __pa(hw->hw_info.res_buf);
482 param.share_start = __pa(hw->hw_info.share->ep_status);
483
484 fjes_hw_init_command_registers(hw, &param);
485 }
486 }
487
488 static void fjes_tx_stall_task(struct work_struct *work)
489 {
490 struct fjes_adapter *adapter = container_of(work,
491 struct fjes_adapter, tx_stall_task);
492 struct net_device *netdev = adapter->netdev;
493 struct fjes_hw *hw = &adapter->hw;
494 int all_queue_available, sendable;
495 enum ep_partner_status pstatus;
496 int max_epid, my_epid, epid;
497 union ep_buffer_info *info;
498 int i;
499
500 if (((long)jiffies -
501 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
502 netif_wake_queue(netdev);
503 return;
504 }
505
506 my_epid = hw->my_epid;
507 max_epid = hw->max_epid;
508
509 for (i = 0; i < 5; i++) {
510 all_queue_available = 1;
511
512 for (epid = 0; epid < max_epid; epid++) {
513 if (my_epid == epid)
514 continue;
515
516 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
517 sendable = (pstatus == EP_PARTNER_SHARED);
518 if (!sendable)
519 continue;
520
521 info = adapter->hw.ep_shm_info[epid].tx.info;
522
523 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
524 return;
525
526 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
527 info->v1i.count_max)) {
528 all_queue_available = 0;
529 break;
530 }
531 }
532
533 if (all_queue_available) {
534 netif_wake_queue(netdev);
535 return;
536 }
537 }
538
539 usleep_range(50, 100);
540
541 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
542 }
543
544 static void fjes_force_close_task(struct work_struct *work)
545 {
546 struct fjes_adapter *adapter = container_of(work,
547 struct fjes_adapter, force_close_task);
548 struct net_device *netdev = adapter->netdev;
549
550 rtnl_lock();
551 dev_close(netdev);
552 rtnl_unlock();
553 }
554
555 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
556 {
557 struct fjes_adapter *adapter = container_of(work,
558 struct fjes_adapter, raise_intr_rxdata_task);
559 struct fjes_hw *hw = &adapter->hw;
560 enum ep_partner_status pstatus;
561 int max_epid, my_epid, epid;
562
563 my_epid = hw->my_epid;
564 max_epid = hw->max_epid;
565
566 for (epid = 0; epid < max_epid; epid++)
567 hw->ep_shm_info[epid].tx_status_work = 0;
568
569 for (epid = 0; epid < max_epid; epid++) {
570 if (epid == my_epid)
571 continue;
572
573 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
574 if (pstatus == EP_PARTNER_SHARED) {
575 hw->ep_shm_info[epid].tx_status_work =
576 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
577
578 if (hw->ep_shm_info[epid].tx_status_work ==
579 FJES_TX_DELAY_SEND_PENDING) {
580 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
581 FJES_TX_DELAY_SEND_NONE;
582 }
583 }
584 }
585
586 for (epid = 0; epid < max_epid; epid++) {
587 if (epid == my_epid)
588 continue;
589
590 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
591 if ((hw->ep_shm_info[epid].tx_status_work ==
592 FJES_TX_DELAY_SEND_PENDING) &&
593 (pstatus == EP_PARTNER_SHARED) &&
594 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
595 FJES_RX_POLL_WORK)) {
596 fjes_hw_raise_interrupt(hw, epid,
597 REG_ICTL_MASK_RX_DATA);
598 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
599 }
600 }
601
602 usleep_range(500, 1000);
603 }
604
605 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
606 void *data, size_t len)
607 {
608 int retval;
609
610 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
611 data, len);
612 if (retval)
613 return retval;
614
615 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
616 FJES_TX_DELAY_SEND_PENDING;
617 if (!work_pending(&adapter->raise_intr_rxdata_task))
618 queue_work(adapter->txrx_wq,
619 &adapter->raise_intr_rxdata_task);
620
621 retval = 0;
622 return retval;
623 }
624
625 static netdev_tx_t
626 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
627 {
628 struct fjes_adapter *adapter = netdev_priv(netdev);
629 struct fjes_hw *hw = &adapter->hw;
630
631 int max_epid, my_epid, dest_epid;
632 enum ep_partner_status pstatus;
633 struct netdev_queue *cur_queue;
634 char shortpkt[VLAN_ETH_HLEN];
635 bool is_multi, vlan;
636 struct ethhdr *eth;
637 u16 queue_no = 0;
638 u16 vlan_id = 0;
639 netdev_tx_t ret;
640 char *data;
641 int len;
642
643 ret = NETDEV_TX_OK;
644 is_multi = false;
645 cur_queue = netdev_get_tx_queue(netdev, queue_no);
646
647 eth = (struct ethhdr *)skb->data;
648 my_epid = hw->my_epid;
649
650 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
651
652 data = skb->data;
653 len = skb->len;
654
655 if (is_multicast_ether_addr(eth->h_dest)) {
656 dest_epid = 0;
657 max_epid = hw->max_epid;
658 is_multi = true;
659 } else if (is_local_ether_addr(eth->h_dest)) {
660 dest_epid = eth->h_dest[ETH_ALEN - 1];
661 max_epid = dest_epid + 1;
662
663 if ((eth->h_dest[0] == 0x02) &&
664 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
665 eth->h_dest[3] | eth->h_dest[4])) &&
666 (dest_epid < hw->max_epid)) {
667 ;
668 } else {
669 dest_epid = 0;
670 max_epid = 0;
671 ret = NETDEV_TX_OK;
672
673 adapter->stats64.tx_packets += 1;
674 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
675 adapter->stats64.tx_bytes += len;
676 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
677 }
678 } else {
679 dest_epid = 0;
680 max_epid = 0;
681 ret = NETDEV_TX_OK;
682
683 adapter->stats64.tx_packets += 1;
684 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
685 adapter->stats64.tx_bytes += len;
686 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
687 }
688
689 for (; dest_epid < max_epid; dest_epid++) {
690 if (my_epid == dest_epid)
691 continue;
692
693 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
694 if (pstatus != EP_PARTNER_SHARED) {
695 if (!is_multi)
696 hw->ep_shm_info[dest_epid].ep_stats
697 .tx_dropped_not_shared += 1;
698 ret = NETDEV_TX_OK;
699 } else if (!fjes_hw_check_epbuf_version(
700 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
701 /* version is NOT 0 */
702 adapter->stats64.tx_carrier_errors += 1;
703 hw->ep_shm_info[dest_epid].net_stats
704 .tx_carrier_errors += 1;
705 hw->ep_shm_info[dest_epid].ep_stats
706 .tx_dropped_ver_mismatch += 1;
707
708 ret = NETDEV_TX_OK;
709 } else if (!fjes_hw_check_mtu(
710 &adapter->hw.ep_shm_info[dest_epid].rx,
711 netdev->mtu)) {
712 adapter->stats64.tx_dropped += 1;
713 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
714 adapter->stats64.tx_errors += 1;
715 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
716 hw->ep_shm_info[dest_epid].ep_stats
717 .tx_dropped_buf_size_mismatch += 1;
718
719 ret = NETDEV_TX_OK;
720 } else if (vlan &&
721 !fjes_hw_check_vlan_id(
722 &adapter->hw.ep_shm_info[dest_epid].rx,
723 vlan_id)) {
724 hw->ep_shm_info[dest_epid].ep_stats
725 .tx_dropped_vlanid_mismatch += 1;
726 ret = NETDEV_TX_OK;
727 } else {
728 if (len < VLAN_ETH_HLEN) {
729 memset(shortpkt, 0, VLAN_ETH_HLEN);
730 memcpy(shortpkt, skb->data, skb->len);
731 len = VLAN_ETH_HLEN;
732 data = shortpkt;
733 }
734
735 if (adapter->tx_retry_count == 0) {
736 adapter->tx_start_jiffies = jiffies;
737 adapter->tx_retry_count = 1;
738 } else {
739 adapter->tx_retry_count++;
740 }
741
742 if (fjes_tx_send(adapter, dest_epid, data, len)) {
743 if (is_multi) {
744 ret = NETDEV_TX_OK;
745 } else if (
746 ((long)jiffies -
747 (long)adapter->tx_start_jiffies) >=
748 FJES_TX_RETRY_TIMEOUT) {
749 adapter->stats64.tx_fifo_errors += 1;
750 hw->ep_shm_info[dest_epid].net_stats
751 .tx_fifo_errors += 1;
752 adapter->stats64.tx_errors += 1;
753 hw->ep_shm_info[dest_epid].net_stats
754 .tx_errors += 1;
755
756 ret = NETDEV_TX_OK;
757 } else {
758 netif_trans_update(netdev);
759 hw->ep_shm_info[dest_epid].ep_stats
760 .tx_buffer_full += 1;
761 netif_tx_stop_queue(cur_queue);
762
763 if (!work_pending(&adapter->tx_stall_task))
764 queue_work(adapter->txrx_wq,
765 &adapter->tx_stall_task);
766
767 ret = NETDEV_TX_BUSY;
768 }
769 } else {
770 if (!is_multi) {
771 adapter->stats64.tx_packets += 1;
772 hw->ep_shm_info[dest_epid].net_stats
773 .tx_packets += 1;
774 adapter->stats64.tx_bytes += len;
775 hw->ep_shm_info[dest_epid].net_stats
776 .tx_bytes += len;
777 }
778
779 adapter->tx_retry_count = 0;
780 ret = NETDEV_TX_OK;
781 }
782 }
783 }
784
785 if (ret == NETDEV_TX_OK) {
786 dev_kfree_skb(skb);
787 if (is_multi) {
788 adapter->stats64.tx_packets += 1;
789 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
790 adapter->stats64.tx_bytes += 1;
791 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
792 }
793 }
794
795 return ret;
796 }
797
798 static void fjes_tx_retry(struct net_device *netdev, unsigned int txqueue)
799 {
800 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
801
802 netif_tx_wake_queue(queue);
803 }
804
805 static void
806 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
807 {
808 struct fjes_adapter *adapter = netdev_priv(netdev);
809
810 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
811 }
812
813 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
814 {
815 struct fjes_adapter *adapter = netdev_priv(netdev);
816 bool running = netif_running(netdev);
817 struct fjes_hw *hw = &adapter->hw;
818 unsigned long flags;
819 int ret = -EINVAL;
820 int idx, epidx;
821
822 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
823 if (new_mtu <= fjes_support_mtu[idx]) {
824 new_mtu = fjes_support_mtu[idx];
825 if (new_mtu == netdev->mtu)
826 return 0;
827
828 ret = 0;
829 break;
830 }
831 }
832
833 if (ret)
834 return ret;
835
836 if (running) {
837 spin_lock_irqsave(&hw->rx_status_lock, flags);
838 for (epidx = 0; epidx < hw->max_epid; epidx++) {
839 if (epidx == hw->my_epid)
840 continue;
841 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
842 ~FJES_RX_MTU_CHANGING_DONE;
843 }
844 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
845
846 netif_tx_stop_all_queues(netdev);
847 netif_carrier_off(netdev);
848 cancel_work_sync(&adapter->tx_stall_task);
849 napi_disable(&adapter->napi);
850
851 msleep(1000);
852
853 netif_tx_stop_all_queues(netdev);
854 }
855
856 netdev->mtu = new_mtu;
857
858 if (running) {
859 for (epidx = 0; epidx < hw->max_epid; epidx++) {
860 if (epidx == hw->my_epid)
861 continue;
862
863 spin_lock_irqsave(&hw->rx_status_lock, flags);
864 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
865 netdev->dev_addr,
866 netdev->mtu);
867
868 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
869 FJES_RX_MTU_CHANGING_DONE;
870 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
871 }
872
873 netif_tx_wake_all_queues(netdev);
874 netif_carrier_on(netdev);
875 napi_enable(&adapter->napi);
876 napi_schedule(&adapter->napi);
877 }
878
879 return ret;
880 }
881
882 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
883 __be16 proto, u16 vid)
884 {
885 struct fjes_adapter *adapter = netdev_priv(netdev);
886 bool ret = true;
887 int epid;
888
889 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
890 if (epid == adapter->hw.my_epid)
891 continue;
892
893 if (!fjes_hw_check_vlan_id(
894 &adapter->hw.ep_shm_info[epid].tx, vid))
895 ret = fjes_hw_set_vlan_id(
896 &adapter->hw.ep_shm_info[epid].tx, vid);
897 }
898
899 return ret ? 0 : -ENOSPC;
900 }
901
902 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
903 __be16 proto, u16 vid)
904 {
905 struct fjes_adapter *adapter = netdev_priv(netdev);
906 int epid;
907
908 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
909 if (epid == adapter->hw.my_epid)
910 continue;
911
912 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
913 }
914
915 return 0;
916 }
917
918 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
919 int src_epid)
920 {
921 struct fjes_hw *hw = &adapter->hw;
922 enum ep_partner_status status;
923 unsigned long flags;
924
925 status = fjes_hw_get_partner_ep_status(hw, src_epid);
926 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
927 switch (status) {
928 case EP_PARTNER_UNSHARE:
929 case EP_PARTNER_COMPLETE:
930 default:
931 break;
932 case EP_PARTNER_WAITING:
933 if (src_epid < hw->my_epid) {
934 spin_lock_irqsave(&hw->rx_status_lock, flags);
935 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
936 FJES_RX_STOP_REQ_DONE;
937 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
938
939 clear_bit(src_epid, &hw->txrx_stop_req_bit);
940 set_bit(src_epid, &adapter->unshare_watch_bitmask);
941
942 if (!work_pending(&adapter->unshare_watch_task))
943 queue_work(adapter->control_wq,
944 &adapter->unshare_watch_task);
945 }
946 break;
947 case EP_PARTNER_SHARED:
948 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
949 FJES_RX_STOP_REQ_REQUEST) {
950 set_bit(src_epid, &hw->epstop_req_bit);
951 if (!work_pending(&hw->epstop_task))
952 queue_work(adapter->control_wq,
953 &hw->epstop_task);
954 }
955 break;
956 }
957 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
958 }
959
960 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
961 {
962 struct fjes_hw *hw = &adapter->hw;
963 enum ep_partner_status status;
964 unsigned long flags;
965
966 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
967
968 status = fjes_hw_get_partner_ep_status(hw, src_epid);
969 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
970 switch (status) {
971 case EP_PARTNER_WAITING:
972 spin_lock_irqsave(&hw->rx_status_lock, flags);
973 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
974 FJES_RX_STOP_REQ_DONE;
975 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
976 clear_bit(src_epid, &hw->txrx_stop_req_bit);
977 /* fall through */
978 case EP_PARTNER_UNSHARE:
979 case EP_PARTNER_COMPLETE:
980 default:
981 set_bit(src_epid, &adapter->unshare_watch_bitmask);
982 if (!work_pending(&adapter->unshare_watch_task))
983 queue_work(adapter->control_wq,
984 &adapter->unshare_watch_task);
985 break;
986 case EP_PARTNER_SHARED:
987 set_bit(src_epid, &hw->epstop_req_bit);
988
989 if (!work_pending(&hw->epstop_task))
990 queue_work(adapter->control_wq, &hw->epstop_task);
991 break;
992 }
993 trace_fjes_stop_req_irq_post(hw, src_epid);
994 }
995
996 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
997 int src_epid)
998 {
999 struct fjes_hw *hw = &adapter->hw;
1000
1001 if (!work_pending(&hw->update_zone_task))
1002 queue_work(adapter->control_wq, &hw->update_zone_task);
1003 }
1004
1005 static irqreturn_t fjes_intr(int irq, void *data)
1006 {
1007 struct fjes_adapter *adapter = data;
1008 struct fjes_hw *hw = &adapter->hw;
1009 irqreturn_t ret;
1010 u32 icr;
1011
1012 icr = fjes_hw_capture_interrupt_status(hw);
1013
1014 if (icr & REG_IS_MASK_IS_ASSERT) {
1015 if (icr & REG_ICTL_MASK_RX_DATA) {
1016 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
1017 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1018 .recv_intr_rx += 1;
1019 }
1020
1021 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
1022 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1023 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1024 .recv_intr_stop += 1;
1025 }
1026
1027 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1028 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1029 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1030 .recv_intr_unshare += 1;
1031 }
1032
1033 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
1034 fjes_hw_set_irqmask(hw,
1035 REG_ICTL_MASK_TXRX_STOP_DONE, true);
1036
1037 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
1038 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
1039 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1040 .recv_intr_zoneupdate += 1;
1041 }
1042
1043 ret = IRQ_HANDLED;
1044 } else {
1045 ret = IRQ_NONE;
1046 }
1047
1048 return ret;
1049 }
1050
1051 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1052 int start_epid)
1053 {
1054 struct fjes_hw *hw = &adapter->hw;
1055 enum ep_partner_status pstatus;
1056 int max_epid, cur_epid;
1057 int i;
1058
1059 max_epid = hw->max_epid;
1060 start_epid = (start_epid + 1 + max_epid) % max_epid;
1061
1062 for (i = 0; i < max_epid; i++) {
1063 cur_epid = (start_epid + i) % max_epid;
1064 if (cur_epid == hw->my_epid)
1065 continue;
1066
1067 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1068 if (pstatus == EP_PARTNER_SHARED) {
1069 if (!fjes_hw_epbuf_rx_is_empty(
1070 &hw->ep_shm_info[cur_epid].rx))
1071 return cur_epid;
1072 }
1073 }
1074 return -1;
1075 }
1076
1077 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1078 int *cur_epid)
1079 {
1080 void *frame;
1081
1082 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1083 if (*cur_epid < 0)
1084 return NULL;
1085
1086 frame =
1087 fjes_hw_epbuf_rx_curpkt_get_addr(
1088 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1089
1090 return frame;
1091 }
1092
1093 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1094 {
1095 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1096 }
1097
1098 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1099 {
1100 struct fjes_hw *hw = &adapter->hw;
1101
1102 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1103
1104 adapter->unset_rx_last = true;
1105 napi_schedule(&adapter->napi);
1106 }
1107
1108 static int fjes_poll(struct napi_struct *napi, int budget)
1109 {
1110 struct fjes_adapter *adapter =
1111 container_of(napi, struct fjes_adapter, napi);
1112 struct net_device *netdev = napi->dev;
1113 struct fjes_hw *hw = &adapter->hw;
1114 struct sk_buff *skb;
1115 int work_done = 0;
1116 int cur_epid = 0;
1117 int epidx;
1118 size_t frame_len;
1119 void *frame;
1120
1121 spin_lock(&hw->rx_status_lock);
1122 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1123 if (epidx == hw->my_epid)
1124 continue;
1125
1126 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1127 EP_PARTNER_SHARED)
1128 adapter->hw.ep_shm_info[epidx]
1129 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1130 }
1131 spin_unlock(&hw->rx_status_lock);
1132
1133 while (work_done < budget) {
1134 prefetch(&adapter->hw);
1135 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1136
1137 if (frame) {
1138 skb = napi_alloc_skb(napi, frame_len);
1139 if (!skb) {
1140 adapter->stats64.rx_dropped += 1;
1141 hw->ep_shm_info[cur_epid].net_stats
1142 .rx_dropped += 1;
1143 adapter->stats64.rx_errors += 1;
1144 hw->ep_shm_info[cur_epid].net_stats
1145 .rx_errors += 1;
1146 } else {
1147 skb_put_data(skb, frame, frame_len);
1148 skb->protocol = eth_type_trans(skb, netdev);
1149 skb->ip_summed = CHECKSUM_UNNECESSARY;
1150
1151 netif_receive_skb(skb);
1152
1153 work_done++;
1154
1155 adapter->stats64.rx_packets += 1;
1156 hw->ep_shm_info[cur_epid].net_stats
1157 .rx_packets += 1;
1158 adapter->stats64.rx_bytes += frame_len;
1159 hw->ep_shm_info[cur_epid].net_stats
1160 .rx_bytes += frame_len;
1161
1162 if (is_multicast_ether_addr(
1163 ((struct ethhdr *)frame)->h_dest)) {
1164 adapter->stats64.multicast += 1;
1165 hw->ep_shm_info[cur_epid].net_stats
1166 .multicast += 1;
1167 }
1168 }
1169
1170 fjes_rxframe_release(adapter, cur_epid);
1171 adapter->unset_rx_last = true;
1172 } else {
1173 break;
1174 }
1175 }
1176
1177 if (work_done < budget) {
1178 napi_complete_done(napi, work_done);
1179
1180 if (adapter->unset_rx_last) {
1181 adapter->rx_last_jiffies = jiffies;
1182 adapter->unset_rx_last = false;
1183 }
1184
1185 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1186 napi_reschedule(napi);
1187 } else {
1188 spin_lock(&hw->rx_status_lock);
1189 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1190 if (epidx == hw->my_epid)
1191 continue;
1192 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1193 EP_PARTNER_SHARED)
1194 adapter->hw.ep_shm_info[epidx].tx
1195 .info->v1i.rx_status &=
1196 ~FJES_RX_POLL_WORK;
1197 }
1198 spin_unlock(&hw->rx_status_lock);
1199
1200 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1201 }
1202 }
1203
1204 return work_done;
1205 }
1206
1207 /* fjes_probe - Device Initialization Routine */
1208 static int fjes_probe(struct platform_device *plat_dev)
1209 {
1210 struct fjes_adapter *adapter;
1211 struct net_device *netdev;
1212 struct resource *res;
1213 struct fjes_hw *hw;
1214 int err;
1215
1216 err = -ENOMEM;
1217 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1218 NET_NAME_UNKNOWN, fjes_netdev_setup,
1219 FJES_MAX_QUEUES);
1220
1221 if (!netdev)
1222 goto err_out;
1223
1224 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1225
1226 dev_set_drvdata(&plat_dev->dev, netdev);
1227 adapter = netdev_priv(netdev);
1228 adapter->netdev = netdev;
1229 adapter->plat_dev = plat_dev;
1230 hw = &adapter->hw;
1231 hw->back = adapter;
1232
1233 /* setup the private structure */
1234 err = fjes_sw_init(adapter);
1235 if (err)
1236 goto err_free_netdev;
1237
1238 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1239 adapter->force_reset = false;
1240 adapter->open_guard = false;
1241
1242 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1243 if (unlikely(!adapter->txrx_wq)) {
1244 err = -ENOMEM;
1245 goto err_free_netdev;
1246 }
1247
1248 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1249 WQ_MEM_RECLAIM, 0);
1250 if (unlikely(!adapter->control_wq)) {
1251 err = -ENOMEM;
1252 goto err_free_txrx_wq;
1253 }
1254
1255 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1256 INIT_WORK(&adapter->raise_intr_rxdata_task,
1257 fjes_raise_intr_rxdata_task);
1258 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1259 adapter->unshare_watch_bitmask = 0;
1260
1261 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1262 adapter->interrupt_watch_enable = false;
1263
1264 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1265 hw->hw_res.start = res->start;
1266 hw->hw_res.size = resource_size(res);
1267 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1268 err = fjes_hw_init(&adapter->hw);
1269 if (err)
1270 goto err_free_control_wq;
1271
1272 /* setup MAC address (02:00:00:00:00:[epid])*/
1273 netdev->dev_addr[0] = 2;
1274 netdev->dev_addr[1] = 0;
1275 netdev->dev_addr[2] = 0;
1276 netdev->dev_addr[3] = 0;
1277 netdev->dev_addr[4] = 0;
1278 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1279
1280 err = register_netdev(netdev);
1281 if (err)
1282 goto err_hw_exit;
1283
1284 netif_carrier_off(netdev);
1285
1286 fjes_dbg_adapter_init(adapter);
1287
1288 return 0;
1289
1290 err_hw_exit:
1291 fjes_hw_exit(&adapter->hw);
1292 err_free_control_wq:
1293 destroy_workqueue(adapter->control_wq);
1294 err_free_txrx_wq:
1295 destroy_workqueue(adapter->txrx_wq);
1296 err_free_netdev:
1297 free_netdev(netdev);
1298 err_out:
1299 return err;
1300 }
1301
1302 /* fjes_remove - Device Removal Routine */
1303 static int fjes_remove(struct platform_device *plat_dev)
1304 {
1305 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1306 struct fjes_adapter *adapter = netdev_priv(netdev);
1307 struct fjes_hw *hw = &adapter->hw;
1308
1309 fjes_dbg_adapter_exit(adapter);
1310
1311 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1312 cancel_work_sync(&adapter->unshare_watch_task);
1313 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1314 cancel_work_sync(&adapter->tx_stall_task);
1315 if (adapter->control_wq)
1316 destroy_workqueue(adapter->control_wq);
1317 if (adapter->txrx_wq)
1318 destroy_workqueue(adapter->txrx_wq);
1319
1320 unregister_netdev(netdev);
1321
1322 fjes_hw_exit(hw);
1323
1324 netif_napi_del(&adapter->napi);
1325
1326 free_netdev(netdev);
1327
1328 return 0;
1329 }
1330
1331 static int fjes_sw_init(struct fjes_adapter *adapter)
1332 {
1333 struct net_device *netdev = adapter->netdev;
1334
1335 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1336
1337 return 0;
1338 }
1339
1340 /* fjes_netdev_setup - netdevice initialization routine */
1341 static void fjes_netdev_setup(struct net_device *netdev)
1342 {
1343 ether_setup(netdev);
1344
1345 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1346 netdev->netdev_ops = &fjes_netdev_ops;
1347 fjes_set_ethtool_ops(netdev);
1348 netdev->mtu = fjes_support_mtu[3];
1349 netdev->min_mtu = fjes_support_mtu[0];
1350 netdev->max_mtu = fjes_support_mtu[3];
1351 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1352 }
1353
1354 static void fjes_irq_watch_task(struct work_struct *work)
1355 {
1356 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1357 struct fjes_adapter, interrupt_watch_task);
1358
1359 local_irq_disable();
1360 fjes_intr(adapter->hw.hw_res.irq, adapter);
1361 local_irq_enable();
1362
1363 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1364 napi_schedule(&adapter->napi);
1365
1366 if (adapter->interrupt_watch_enable) {
1367 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1368 queue_delayed_work(adapter->control_wq,
1369 &adapter->interrupt_watch_task,
1370 FJES_IRQ_WATCH_DELAY);
1371 }
1372 }
1373
1374 static void fjes_watch_unshare_task(struct work_struct *work)
1375 {
1376 struct fjes_adapter *adapter =
1377 container_of(work, struct fjes_adapter, unshare_watch_task);
1378
1379 struct net_device *netdev = adapter->netdev;
1380 struct fjes_hw *hw = &adapter->hw;
1381
1382 int unshare_watch, unshare_reserve;
1383 int max_epid, my_epid, epidx;
1384 int stop_req, stop_req_done;
1385 ulong unshare_watch_bitmask;
1386 unsigned long flags;
1387 int wait_time = 0;
1388 int is_shared;
1389 int ret;
1390
1391 my_epid = hw->my_epid;
1392 max_epid = hw->max_epid;
1393
1394 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1395 adapter->unshare_watch_bitmask = 0;
1396
1397 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1398 (wait_time < 3000)) {
1399 for (epidx = 0; epidx < max_epid; epidx++) {
1400 if (epidx == my_epid)
1401 continue;
1402
1403 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1404 epidx);
1405
1406 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1407
1408 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1409 FJES_RX_STOP_REQ_DONE;
1410
1411 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1412
1413 unshare_reserve = test_bit(epidx,
1414 &hw->hw_info.buffer_unshare_reserve_bit);
1415
1416 if ((!stop_req ||
1417 (is_shared && (!is_shared || !stop_req_done))) &&
1418 (is_shared || !unshare_watch || !unshare_reserve))
1419 continue;
1420
1421 mutex_lock(&hw->hw_info.lock);
1422 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1423 switch (ret) {
1424 case 0:
1425 break;
1426 case -ENOMSG:
1427 case -EBUSY:
1428 default:
1429 if (!work_pending(
1430 &adapter->force_close_task)) {
1431 adapter->force_reset = true;
1432 schedule_work(
1433 &adapter->force_close_task);
1434 }
1435 break;
1436 }
1437 mutex_unlock(&hw->hw_info.lock);
1438 hw->ep_shm_info[epidx].ep_stats
1439 .com_unregist_buf_exec += 1;
1440
1441 spin_lock_irqsave(&hw->rx_status_lock, flags);
1442 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1443 netdev->dev_addr, netdev->mtu);
1444 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1445
1446 clear_bit(epidx, &hw->txrx_stop_req_bit);
1447 clear_bit(epidx, &unshare_watch_bitmask);
1448 clear_bit(epidx,
1449 &hw->hw_info.buffer_unshare_reserve_bit);
1450 }
1451
1452 msleep(100);
1453 wait_time += 100;
1454 }
1455
1456 if (hw->hw_info.buffer_unshare_reserve_bit) {
1457 for (epidx = 0; epidx < max_epid; epidx++) {
1458 if (epidx == my_epid)
1459 continue;
1460
1461 if (test_bit(epidx,
1462 &hw->hw_info.buffer_unshare_reserve_bit)) {
1463 mutex_lock(&hw->hw_info.lock);
1464
1465 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1466 switch (ret) {
1467 case 0:
1468 break;
1469 case -ENOMSG:
1470 case -EBUSY:
1471 default:
1472 if (!work_pending(
1473 &adapter->force_close_task)) {
1474 adapter->force_reset = true;
1475 schedule_work(
1476 &adapter->force_close_task);
1477 }
1478 break;
1479 }
1480 mutex_unlock(&hw->hw_info.lock);
1481
1482 hw->ep_shm_info[epidx].ep_stats
1483 .com_unregist_buf_exec += 1;
1484
1485 spin_lock_irqsave(&hw->rx_status_lock, flags);
1486 fjes_hw_setup_epbuf(
1487 &hw->ep_shm_info[epidx].tx,
1488 netdev->dev_addr, netdev->mtu);
1489 spin_unlock_irqrestore(&hw->rx_status_lock,
1490 flags);
1491
1492 clear_bit(epidx, &hw->txrx_stop_req_bit);
1493 clear_bit(epidx, &unshare_watch_bitmask);
1494 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1495 }
1496
1497 if (test_bit(epidx, &unshare_watch_bitmask)) {
1498 spin_lock_irqsave(&hw->rx_status_lock, flags);
1499 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1500 ~FJES_RX_STOP_REQ_DONE;
1501 spin_unlock_irqrestore(&hw->rx_status_lock,
1502 flags);
1503 }
1504 }
1505 }
1506 }
1507
1508 static acpi_status
1509 acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1510 void *context, void **return_value)
1511 {
1512 struct acpi_device *device;
1513 bool *found = context;
1514 int result;
1515
1516 result = acpi_bus_get_device(obj_handle, &device);
1517 if (result)
1518 return AE_OK;
1519
1520 if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1521 return AE_OK;
1522
1523 if (!is_extended_socket_device(device))
1524 return AE_OK;
1525
1526 if (acpi_check_extended_socket_status(device))
1527 return AE_OK;
1528
1529 *found = true;
1530 return AE_CTRL_TERMINATE;
1531 }
1532
1533 /* fjes_init_module - Driver Registration Routine */
1534 static int __init fjes_init_module(void)
1535 {
1536 bool found = false;
1537 int result;
1538
1539 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1540 acpi_find_extended_socket_device, NULL, &found,
1541 NULL);
1542
1543 if (!found)
1544 return -ENODEV;
1545
1546 pr_info("%s - version %s - %s\n",
1547 fjes_driver_string, fjes_driver_version, fjes_copyright);
1548
1549 fjes_dbg_init();
1550
1551 result = platform_driver_register(&fjes_driver);
1552 if (result < 0) {
1553 fjes_dbg_exit();
1554 return result;
1555 }
1556
1557 result = acpi_bus_register_driver(&fjes_acpi_driver);
1558 if (result < 0)
1559 goto fail_acpi_driver;
1560
1561 return 0;
1562
1563 fail_acpi_driver:
1564 platform_driver_unregister(&fjes_driver);
1565 fjes_dbg_exit();
1566 return result;
1567 }
1568
1569 module_init(fjes_init_module);
1570
1571 /* fjes_exit_module - Driver Exit Cleanup Routine */
1572 static void __exit fjes_exit_module(void)
1573 {
1574 acpi_bus_unregister_driver(&fjes_acpi_driver);
1575 platform_driver_unregister(&fjes_driver);
1576 fjes_dbg_exit();
1577 }
1578
1579 module_exit(fjes_exit_module);
Linux with added FPC-III support