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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"
21char fjes_driver_name[] = DRV_NAME;
22char fjes_driver_version[] = DRV_VERSION;
23static const char fjes_driver_string[] =
24 "FUJITSU Extended Socket Network Device Driver";
25static const char fjes_copyright[] =
26 "Copyright (c) 2015 FUJITSU LIMITED";
27
28MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
29MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
30MODULE_LICENSE("GPL");
31MODULE_VERSION(DRV_VERSION);
32
33#define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02"
34
35static const struct acpi_device_id fjes_acpi_ids[] = {
36 {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
37 {"", 0},
38};
39MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
40
41static bool is_extended_socket_device(struct acpi_device *device)
42{
43 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
44 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
45 union acpi_object *str;
46 acpi_status status;
47 int result;
48
49 status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
50 if (ACPI_FAILURE(status))
51 return false;
52
53 str = buffer.pointer;
54 result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
55 str->string.length, UTF16_LITTLE_ENDIAN,
56 str_buf, sizeof(str_buf) - 1);
57 str_buf[result] = 0;
58
59 if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
60 kfree(buffer.pointer);
61 return false;
62 }
63 kfree(buffer.pointer);
64
65 return true;
66}
67
68static int acpi_check_extended_socket_status(struct acpi_device *device)
69{
70 unsigned long long sta;
71 acpi_status status;
72
73 status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
74 if (ACPI_FAILURE(status))
75 return -ENODEV;
76
77 if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
78 (sta & ACPI_STA_DEVICE_ENABLED) &&
79 (sta & ACPI_STA_DEVICE_UI) &&
80 (sta & ACPI_STA_DEVICE_FUNCTIONING)))
81 return -ENODEV;
82
83 return 0;
84}
85
86static acpi_status
87fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
88{
89 struct acpi_resource_address32 *addr;
90 struct acpi_resource_irq *irq;
91 struct resource *res = data;
92
93 switch (acpi_res->type) {
94 case ACPI_RESOURCE_TYPE_ADDRESS32:
95 addr = &acpi_res->data.address32;
96 res[0].start = addr->address.minimum;
97 res[0].end = addr->address.minimum +
98 addr->address.address_length - 1;
99 break;
100
101 case ACPI_RESOURCE_TYPE_IRQ:
102 irq = &acpi_res->data.irq;
103 if (irq->interrupt_count != 1)
104 return AE_ERROR;
105 res[1].start = irq->interrupts[0];
106 res[1].end = irq->interrupts[0];
107 break;
108
109 default:
110 break;
111 }
112
113 return AE_OK;
114}
115
116static struct resource fjes_resource[] = {
117 DEFINE_RES_MEM(0, 1),
118 DEFINE_RES_IRQ(0)
119};
120
121static int fjes_acpi_add(struct acpi_device *device)
122{
123 struct platform_device *plat_dev;
124 acpi_status status;
125
126 if (!is_extended_socket_device(device))
127 return -ENODEV;
128
129 if (acpi_check_extended_socket_status(device))
130 return -ENODEV;
131
132 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
133 fjes_get_acpi_resource, fjes_resource);
134 if (ACPI_FAILURE(status))
135 return -ENODEV;
136
137 /* create platform_device */
138 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
139 ARRAY_SIZE(fjes_resource));
140 if (IS_ERR(plat_dev))
141 return PTR_ERR(plat_dev);
142
143 device->driver_data = plat_dev;
144
145 return 0;
146}
147
148static void fjes_acpi_remove(struct acpi_device *device)
149{
150 struct platform_device *plat_dev;
151
152 plat_dev = (struct platform_device *)acpi_driver_data(device);
153 platform_device_unregister(plat_dev);
154}
155
156static struct acpi_driver fjes_acpi_driver = {
157 .name = DRV_NAME,
158 .class = DRV_NAME,
159 .owner = THIS_MODULE,
160 .ids = fjes_acpi_ids,
161 .ops = {
162 .add = fjes_acpi_add,
163 .remove = fjes_acpi_remove,
164 },
165};
166
167static int fjes_setup_resources(struct fjes_adapter *adapter)
168{
169 struct net_device *netdev = adapter->netdev;
170 struct ep_share_mem_info *buf_pair;
171 struct fjes_hw *hw = &adapter->hw;
172 unsigned long flags;
173 int result;
174 int epidx;
175
176 mutex_lock(&hw->hw_info.lock);
177 result = fjes_hw_request_info(hw);
178 switch (result) {
179 case 0:
180 for (epidx = 0; epidx < hw->max_epid; epidx++) {
181 hw->ep_shm_info[epidx].es_status =
182 hw->hw_info.res_buf->info.info[epidx].es_status;
183 hw->ep_shm_info[epidx].zone =
184 hw->hw_info.res_buf->info.info[epidx].zone;
185 }
186 break;
187 default:
188 case -ENOMSG:
189 case -EBUSY:
190 adapter->force_reset = true;
191
192 mutex_unlock(&hw->hw_info.lock);
193 return result;
194 }
195 mutex_unlock(&hw->hw_info.lock);
196
197 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
198 if ((epidx != hw->my_epid) &&
199 (hw->ep_shm_info[epidx].es_status ==
200 FJES_ZONING_STATUS_ENABLE)) {
201 fjes_hw_raise_interrupt(hw, epidx,
202 REG_ICTL_MASK_INFO_UPDATE);
203 hw->ep_shm_info[epidx].ep_stats
204 .send_intr_zoneupdate += 1;
205 }
206 }
207
208 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
209
210 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
211 if (epidx == hw->my_epid)
212 continue;
213
214 buf_pair = &hw->ep_shm_info[epidx];
215
216 spin_lock_irqsave(&hw->rx_status_lock, flags);
217 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
218 netdev->mtu);
219 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
220
221 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
222 mutex_lock(&hw->hw_info.lock);
223 result =
224 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
225 mutex_unlock(&hw->hw_info.lock);
226
227 switch (result) {
228 case 0:
229 break;
230 case -ENOMSG:
231 case -EBUSY:
232 default:
233 adapter->force_reset = true;
234 return result;
235 }
236
237 hw->ep_shm_info[epidx].ep_stats
238 .com_regist_buf_exec += 1;
239 }
240 }
241
242 return 0;
243}
244
245static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
246{
247 struct fjes_hw *hw = &adapter->hw;
248
249 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
250
251 adapter->unset_rx_last = true;
252 napi_schedule(&adapter->napi);
253}
254
255static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
256{
257 struct fjes_hw *hw = &adapter->hw;
258 enum ep_partner_status status;
259 unsigned long flags;
260
261 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
262
263 status = fjes_hw_get_partner_ep_status(hw, src_epid);
264 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
265 switch (status) {
266 case EP_PARTNER_WAITING:
267 spin_lock_irqsave(&hw->rx_status_lock, flags);
268 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
269 FJES_RX_STOP_REQ_DONE;
270 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
271 clear_bit(src_epid, &hw->txrx_stop_req_bit);
272 fallthrough;
273 case EP_PARTNER_UNSHARE:
274 case EP_PARTNER_COMPLETE:
275 default:
276 set_bit(src_epid, &adapter->unshare_watch_bitmask);
277 if (!work_pending(&adapter->unshare_watch_task))
278 queue_work(adapter->control_wq,
279 &adapter->unshare_watch_task);
280 break;
281 case EP_PARTNER_SHARED:
282 set_bit(src_epid, &hw->epstop_req_bit);
283
284 if (!work_pending(&hw->epstop_task))
285 queue_work(adapter->control_wq, &hw->epstop_task);
286 break;
287 }
288 trace_fjes_stop_req_irq_post(hw, src_epid);
289}
290
291static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
292 int src_epid)
293{
294 struct fjes_hw *hw = &adapter->hw;
295 enum ep_partner_status status;
296 unsigned long flags;
297
298 status = fjes_hw_get_partner_ep_status(hw, src_epid);
299 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
300 switch (status) {
301 case EP_PARTNER_UNSHARE:
302 case EP_PARTNER_COMPLETE:
303 default:
304 break;
305 case EP_PARTNER_WAITING:
306 if (src_epid < hw->my_epid) {
307 spin_lock_irqsave(&hw->rx_status_lock, flags);
308 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
309 FJES_RX_STOP_REQ_DONE;
310 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
311
312 clear_bit(src_epid, &hw->txrx_stop_req_bit);
313 set_bit(src_epid, &adapter->unshare_watch_bitmask);
314
315 if (!work_pending(&adapter->unshare_watch_task))
316 queue_work(adapter->control_wq,
317 &adapter->unshare_watch_task);
318 }
319 break;
320 case EP_PARTNER_SHARED:
321 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
322 FJES_RX_STOP_REQ_REQUEST) {
323 set_bit(src_epid, &hw->epstop_req_bit);
324 if (!work_pending(&hw->epstop_task))
325 queue_work(adapter->control_wq,
326 &hw->epstop_task);
327 }
328 break;
329 }
330 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
331}
332
333static void fjes_update_zone_irq(struct fjes_adapter *adapter,
334 int src_epid)
335{
336 struct fjes_hw *hw = &adapter->hw;
337
338 if (!work_pending(&hw->update_zone_task))
339 queue_work(adapter->control_wq, &hw->update_zone_task);
340}
341
342static irqreturn_t fjes_intr(int irq, void *data)
343{
344 struct fjes_adapter *adapter = data;
345 struct fjes_hw *hw = &adapter->hw;
346 irqreturn_t ret;
347 u32 icr;
348
349 icr = fjes_hw_capture_interrupt_status(hw);
350
351 if (icr & REG_IS_MASK_IS_ASSERT) {
352 if (icr & REG_ICTL_MASK_RX_DATA) {
353 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
354 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
355 .recv_intr_rx += 1;
356 }
357
358 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
359 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
360 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
361 .recv_intr_stop += 1;
362 }
363
364 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
365 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
366 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
367 .recv_intr_unshare += 1;
368 }
369
370 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
371 fjes_hw_set_irqmask(hw,
372 REG_ICTL_MASK_TXRX_STOP_DONE, true);
373
374 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
375 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
376 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
377 .recv_intr_zoneupdate += 1;
378 }
379
380 ret = IRQ_HANDLED;
381 } else {
382 ret = IRQ_NONE;
383 }
384
385 return ret;
386}
387
388static int fjes_request_irq(struct fjes_adapter *adapter)
389{
390 struct net_device *netdev = adapter->netdev;
391 int result = -1;
392
393 adapter->interrupt_watch_enable = true;
394 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
395 queue_delayed_work(adapter->control_wq,
396 &adapter->interrupt_watch_task,
397 FJES_IRQ_WATCH_DELAY);
398 }
399
400 if (!adapter->irq_registered) {
401 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
402 IRQF_SHARED, netdev->name, adapter);
403 if (result)
404 adapter->irq_registered = false;
405 else
406 adapter->irq_registered = true;
407 }
408
409 return result;
410}
411
412static void fjes_free_irq(struct fjes_adapter *adapter)
413{
414 struct fjes_hw *hw = &adapter->hw;
415
416 adapter->interrupt_watch_enable = false;
417 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
418
419 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
420
421 if (adapter->irq_registered) {
422 free_irq(adapter->hw.hw_res.irq, adapter);
423 adapter->irq_registered = false;
424 }
425}
426
427static void fjes_free_resources(struct fjes_adapter *adapter)
428{
429 struct net_device *netdev = adapter->netdev;
430 struct fjes_device_command_param param;
431 struct ep_share_mem_info *buf_pair;
432 struct fjes_hw *hw = &adapter->hw;
433 bool reset_flag = false;
434 unsigned long flags;
435 int result;
436 int epidx;
437
438 for (epidx = 0; epidx < hw->max_epid; epidx++) {
439 if (epidx == hw->my_epid)
440 continue;
441
442 mutex_lock(&hw->hw_info.lock);
443 result = fjes_hw_unregister_buff_addr(hw, epidx);
444 mutex_unlock(&hw->hw_info.lock);
445
446 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
447
448 if (result)
449 reset_flag = true;
450
451 buf_pair = &hw->ep_shm_info[epidx];
452
453 spin_lock_irqsave(&hw->rx_status_lock, flags);
454 fjes_hw_setup_epbuf(&buf_pair->tx,
455 netdev->dev_addr, netdev->mtu);
456 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
457
458 clear_bit(epidx, &hw->txrx_stop_req_bit);
459 }
460
461 if (reset_flag || adapter->force_reset) {
462 result = fjes_hw_reset(hw);
463
464 adapter->force_reset = false;
465
466 if (result)
467 adapter->open_guard = true;
468
469 hw->hw_info.buffer_share_bit = 0;
470
471 memset((void *)¶m, 0, sizeof(param));
472
473 param.req_len = hw->hw_info.req_buf_size;
474 param.req_start = __pa(hw->hw_info.req_buf);
475 param.res_len = hw->hw_info.res_buf_size;
476 param.res_start = __pa(hw->hw_info.res_buf);
477 param.share_start = __pa(hw->hw_info.share->ep_status);
478
479 fjes_hw_init_command_registers(hw, ¶m);
480 }
481}
482
483/* fjes_open - Called when a network interface is made active */
484static int fjes_open(struct net_device *netdev)
485{
486 struct fjes_adapter *adapter = netdev_priv(netdev);
487 struct fjes_hw *hw = &adapter->hw;
488 int result;
489
490 if (adapter->open_guard)
491 return -ENXIO;
492
493 result = fjes_setup_resources(adapter);
494 if (result)
495 goto err_setup_res;
496
497 hw->txrx_stop_req_bit = 0;
498 hw->epstop_req_bit = 0;
499
500 napi_enable(&adapter->napi);
501
502 fjes_hw_capture_interrupt_status(hw);
503
504 result = fjes_request_irq(adapter);
505 if (result)
506 goto err_req_irq;
507
508 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
509
510 netif_tx_start_all_queues(netdev);
511 netif_carrier_on(netdev);
512
513 return 0;
514
515err_req_irq:
516 fjes_free_irq(adapter);
517 napi_disable(&adapter->napi);
518
519err_setup_res:
520 fjes_free_resources(adapter);
521 return result;
522}
523
524/* fjes_close - Disables a network interface */
525static int fjes_close(struct net_device *netdev)
526{
527 struct fjes_adapter *adapter = netdev_priv(netdev);
528 struct fjes_hw *hw = &adapter->hw;
529 unsigned long flags;
530 int epidx;
531
532 netif_tx_stop_all_queues(netdev);
533 netif_carrier_off(netdev);
534
535 fjes_hw_raise_epstop(hw);
536
537 napi_disable(&adapter->napi);
538
539 spin_lock_irqsave(&hw->rx_status_lock, flags);
540 for (epidx = 0; epidx < hw->max_epid; epidx++) {
541 if (epidx == hw->my_epid)
542 continue;
543
544 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
545 EP_PARTNER_SHARED)
546 adapter->hw.ep_shm_info[epidx]
547 .tx.info->v1i.rx_status &=
548 ~FJES_RX_POLL_WORK;
549 }
550 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
551
552 fjes_free_irq(adapter);
553
554 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
555 cancel_work_sync(&adapter->unshare_watch_task);
556 adapter->unshare_watch_bitmask = 0;
557 cancel_work_sync(&adapter->raise_intr_rxdata_task);
558 cancel_work_sync(&adapter->tx_stall_task);
559
560 cancel_work_sync(&hw->update_zone_task);
561 cancel_work_sync(&hw->epstop_task);
562
563 fjes_hw_wait_epstop(hw);
564
565 fjes_free_resources(adapter);
566
567 return 0;
568}
569
570static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
571 void *data, size_t len)
572{
573 int retval;
574
575 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
576 data, len);
577 if (retval)
578 return retval;
579
580 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
581 FJES_TX_DELAY_SEND_PENDING;
582 if (!work_pending(&adapter->raise_intr_rxdata_task))
583 queue_work(adapter->txrx_wq,
584 &adapter->raise_intr_rxdata_task);
585
586 retval = 0;
587 return retval;
588}
589
590static netdev_tx_t
591fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
592{
593 struct fjes_adapter *adapter = netdev_priv(netdev);
594 struct fjes_hw *hw = &adapter->hw;
595
596 int max_epid, my_epid, dest_epid;
597 enum ep_partner_status pstatus;
598 struct netdev_queue *cur_queue;
599 char shortpkt[VLAN_ETH_HLEN];
600 bool is_multi, vlan;
601 struct ethhdr *eth;
602 u16 queue_no = 0;
603 u16 vlan_id = 0;
604 netdev_tx_t ret;
605 char *data;
606 int len;
607
608 ret = NETDEV_TX_OK;
609 is_multi = false;
610 cur_queue = netdev_get_tx_queue(netdev, queue_no);
611
612 eth = (struct ethhdr *)skb->data;
613 my_epid = hw->my_epid;
614
615 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
616
617 data = skb->data;
618 len = skb->len;
619
620 if (is_multicast_ether_addr(eth->h_dest)) {
621 dest_epid = 0;
622 max_epid = hw->max_epid;
623 is_multi = true;
624 } else if (is_local_ether_addr(eth->h_dest)) {
625 dest_epid = eth->h_dest[ETH_ALEN - 1];
626 max_epid = dest_epid + 1;
627
628 if ((eth->h_dest[0] == 0x02) &&
629 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
630 eth->h_dest[3] | eth->h_dest[4])) &&
631 (dest_epid < hw->max_epid)) {
632 ;
633 } else {
634 dest_epid = 0;
635 max_epid = 0;
636 ret = NETDEV_TX_OK;
637
638 adapter->stats64.tx_packets += 1;
639 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
640 adapter->stats64.tx_bytes += len;
641 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
642 }
643 } else {
644 dest_epid = 0;
645 max_epid = 0;
646 ret = NETDEV_TX_OK;
647
648 adapter->stats64.tx_packets += 1;
649 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
650 adapter->stats64.tx_bytes += len;
651 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
652 }
653
654 for (; dest_epid < max_epid; dest_epid++) {
655 if (my_epid == dest_epid)
656 continue;
657
658 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
659 if (pstatus != EP_PARTNER_SHARED) {
660 if (!is_multi)
661 hw->ep_shm_info[dest_epid].ep_stats
662 .tx_dropped_not_shared += 1;
663 ret = NETDEV_TX_OK;
664 } else if (!fjes_hw_check_epbuf_version(
665 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
666 /* version is NOT 0 */
667 adapter->stats64.tx_carrier_errors += 1;
668 hw->ep_shm_info[dest_epid].net_stats
669 .tx_carrier_errors += 1;
670 hw->ep_shm_info[dest_epid].ep_stats
671 .tx_dropped_ver_mismatch += 1;
672
673 ret = NETDEV_TX_OK;
674 } else if (!fjes_hw_check_mtu(
675 &adapter->hw.ep_shm_info[dest_epid].rx,
676 netdev->mtu)) {
677 adapter->stats64.tx_dropped += 1;
678 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
679 adapter->stats64.tx_errors += 1;
680 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
681 hw->ep_shm_info[dest_epid].ep_stats
682 .tx_dropped_buf_size_mismatch += 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 hw->ep_shm_info[dest_epid].ep_stats
690 .tx_dropped_vlanid_mismatch += 1;
691 ret = NETDEV_TX_OK;
692 } else {
693 if (len < VLAN_ETH_HLEN) {
694 memset(shortpkt, 0, VLAN_ETH_HLEN);
695 memcpy(shortpkt, skb->data, skb->len);
696 len = VLAN_ETH_HLEN;
697 data = shortpkt;
698 }
699
700 if (adapter->tx_retry_count == 0) {
701 adapter->tx_start_jiffies = jiffies;
702 adapter->tx_retry_count = 1;
703 } else {
704 adapter->tx_retry_count++;
705 }
706
707 if (fjes_tx_send(adapter, dest_epid, data, len)) {
708 if (is_multi) {
709 ret = NETDEV_TX_OK;
710 } else if (
711 ((long)jiffies -
712 (long)adapter->tx_start_jiffies) >=
713 FJES_TX_RETRY_TIMEOUT) {
714 adapter->stats64.tx_fifo_errors += 1;
715 hw->ep_shm_info[dest_epid].net_stats
716 .tx_fifo_errors += 1;
717 adapter->stats64.tx_errors += 1;
718 hw->ep_shm_info[dest_epid].net_stats
719 .tx_errors += 1;
720
721 ret = NETDEV_TX_OK;
722 } else {
723 netif_trans_update(netdev);
724 hw->ep_shm_info[dest_epid].ep_stats
725 .tx_buffer_full += 1;
726 netif_tx_stop_queue(cur_queue);
727
728 if (!work_pending(&adapter->tx_stall_task))
729 queue_work(adapter->txrx_wq,
730 &adapter->tx_stall_task);
731
732 ret = NETDEV_TX_BUSY;
733 }
734 } else {
735 if (!is_multi) {
736 adapter->stats64.tx_packets += 1;
737 hw->ep_shm_info[dest_epid].net_stats
738 .tx_packets += 1;
739 adapter->stats64.tx_bytes += len;
740 hw->ep_shm_info[dest_epid].net_stats
741 .tx_bytes += len;
742 }
743
744 adapter->tx_retry_count = 0;
745 ret = NETDEV_TX_OK;
746 }
747 }
748 }
749
750 if (ret == NETDEV_TX_OK) {
751 dev_kfree_skb(skb);
752 if (is_multi) {
753 adapter->stats64.tx_packets += 1;
754 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
755 adapter->stats64.tx_bytes += 1;
756 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
757 }
758 }
759
760 return ret;
761}
762
763static void
764fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
765{
766 struct fjes_adapter *adapter = netdev_priv(netdev);
767
768 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
769}
770
771static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
772{
773 struct fjes_adapter *adapter = netdev_priv(netdev);
774 bool running = netif_running(netdev);
775 struct fjes_hw *hw = &adapter->hw;
776 unsigned long flags;
777 int ret = -EINVAL;
778 int idx, epidx;
779
780 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
781 if (new_mtu <= fjes_support_mtu[idx]) {
782 new_mtu = fjes_support_mtu[idx];
783 if (new_mtu == netdev->mtu)
784 return 0;
785
786 ret = 0;
787 break;
788 }
789 }
790
791 if (ret)
792 return ret;
793
794 if (running) {
795 spin_lock_irqsave(&hw->rx_status_lock, flags);
796 for (epidx = 0; epidx < hw->max_epid; epidx++) {
797 if (epidx == hw->my_epid)
798 continue;
799 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
800 ~FJES_RX_MTU_CHANGING_DONE;
801 }
802 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
803
804 netif_tx_stop_all_queues(netdev);
805 netif_carrier_off(netdev);
806 cancel_work_sync(&adapter->tx_stall_task);
807 napi_disable(&adapter->napi);
808
809 msleep(1000);
810
811 netif_tx_stop_all_queues(netdev);
812 }
813
814 netdev->mtu = new_mtu;
815
816 if (running) {
817 for (epidx = 0; epidx < hw->max_epid; epidx++) {
818 if (epidx == hw->my_epid)
819 continue;
820
821 spin_lock_irqsave(&hw->rx_status_lock, flags);
822 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
823 netdev->dev_addr,
824 netdev->mtu);
825
826 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
827 FJES_RX_MTU_CHANGING_DONE;
828 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
829 }
830
831 netif_tx_wake_all_queues(netdev);
832 netif_carrier_on(netdev);
833 napi_enable(&adapter->napi);
834 napi_schedule(&adapter->napi);
835 }
836
837 return ret;
838}
839
840static void fjes_tx_retry(struct net_device *netdev, unsigned int txqueue)
841{
842 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
843
844 netif_tx_wake_queue(queue);
845}
846
847static int fjes_vlan_rx_add_vid(struct net_device *netdev,
848 __be16 proto, u16 vid)
849{
850 struct fjes_adapter *adapter = netdev_priv(netdev);
851 bool ret = true;
852 int epid;
853
854 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
855 if (epid == adapter->hw.my_epid)
856 continue;
857
858 if (!fjes_hw_check_vlan_id(
859 &adapter->hw.ep_shm_info[epid].tx, vid))
860 ret = fjes_hw_set_vlan_id(
861 &adapter->hw.ep_shm_info[epid].tx, vid);
862 }
863
864 return ret ? 0 : -ENOSPC;
865}
866
867static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
868 __be16 proto, u16 vid)
869{
870 struct fjes_adapter *adapter = netdev_priv(netdev);
871 int epid;
872
873 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
874 if (epid == adapter->hw.my_epid)
875 continue;
876
877 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
878 }
879
880 return 0;
881}
882
883static const struct net_device_ops fjes_netdev_ops = {
884 .ndo_open = fjes_open,
885 .ndo_stop = fjes_close,
886 .ndo_start_xmit = fjes_xmit_frame,
887 .ndo_get_stats64 = fjes_get_stats64,
888 .ndo_change_mtu = fjes_change_mtu,
889 .ndo_tx_timeout = fjes_tx_retry,
890 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
891 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
892};
893
894/* fjes_netdev_setup - netdevice initialization routine */
895static void fjes_netdev_setup(struct net_device *netdev)
896{
897 ether_setup(netdev);
898
899 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
900 netdev->netdev_ops = &fjes_netdev_ops;
901 fjes_set_ethtool_ops(netdev);
902 netdev->mtu = fjes_support_mtu[3];
903 netdev->min_mtu = fjes_support_mtu[0];
904 netdev->max_mtu = fjes_support_mtu[3];
905 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
906}
907
908static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
909 int start_epid)
910{
911 struct fjes_hw *hw = &adapter->hw;
912 enum ep_partner_status pstatus;
913 int max_epid, cur_epid;
914 int i;
915
916 max_epid = hw->max_epid;
917 start_epid = (start_epid + 1 + max_epid) % max_epid;
918
919 for (i = 0; i < max_epid; i++) {
920 cur_epid = (start_epid + i) % max_epid;
921 if (cur_epid == hw->my_epid)
922 continue;
923
924 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
925 if (pstatus == EP_PARTNER_SHARED) {
926 if (!fjes_hw_epbuf_rx_is_empty(
927 &hw->ep_shm_info[cur_epid].rx))
928 return cur_epid;
929 }
930 }
931 return -1;
932}
933
934static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
935 int *cur_epid)
936{
937 void *frame;
938
939 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
940 if (*cur_epid < 0)
941 return NULL;
942
943 frame =
944 fjes_hw_epbuf_rx_curpkt_get_addr(
945 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
946
947 return frame;
948}
949
950static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
951{
952 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
953}
954
955static int fjes_poll(struct napi_struct *napi, int budget)
956{
957 struct fjes_adapter *adapter =
958 container_of(napi, struct fjes_adapter, napi);
959 struct net_device *netdev = napi->dev;
960 struct fjes_hw *hw = &adapter->hw;
961 struct sk_buff *skb;
962 int work_done = 0;
963 int cur_epid = 0;
964 int epidx;
965 size_t frame_len;
966 void *frame;
967
968 spin_lock(&hw->rx_status_lock);
969 for (epidx = 0; epidx < hw->max_epid; epidx++) {
970 if (epidx == hw->my_epid)
971 continue;
972
973 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
974 EP_PARTNER_SHARED)
975 adapter->hw.ep_shm_info[epidx]
976 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
977 }
978 spin_unlock(&hw->rx_status_lock);
979
980 while (work_done < budget) {
981 prefetch(&adapter->hw);
982 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
983
984 if (frame) {
985 skb = napi_alloc_skb(napi, frame_len);
986 if (!skb) {
987 adapter->stats64.rx_dropped += 1;
988 hw->ep_shm_info[cur_epid].net_stats
989 .rx_dropped += 1;
990 adapter->stats64.rx_errors += 1;
991 hw->ep_shm_info[cur_epid].net_stats
992 .rx_errors += 1;
993 } else {
994 skb_put_data(skb, frame, frame_len);
995 skb->protocol = eth_type_trans(skb, netdev);
996 skb->ip_summed = CHECKSUM_UNNECESSARY;
997
998 netif_receive_skb(skb);
999
1000 work_done++;
1001
1002 adapter->stats64.rx_packets += 1;
1003 hw->ep_shm_info[cur_epid].net_stats
1004 .rx_packets += 1;
1005 adapter->stats64.rx_bytes += frame_len;
1006 hw->ep_shm_info[cur_epid].net_stats
1007 .rx_bytes += frame_len;
1008
1009 if (is_multicast_ether_addr(
1010 ((struct ethhdr *)frame)->h_dest)) {
1011 adapter->stats64.multicast += 1;
1012 hw->ep_shm_info[cur_epid].net_stats
1013 .multicast += 1;
1014 }
1015 }
1016
1017 fjes_rxframe_release(adapter, cur_epid);
1018 adapter->unset_rx_last = true;
1019 } else {
1020 break;
1021 }
1022 }
1023
1024 if (work_done < budget) {
1025 napi_complete_done(napi, work_done);
1026
1027 if (adapter->unset_rx_last) {
1028 adapter->rx_last_jiffies = jiffies;
1029 adapter->unset_rx_last = false;
1030 }
1031
1032 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1033 napi_schedule(napi);
1034 } else {
1035 spin_lock(&hw->rx_status_lock);
1036 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1037 if (epidx == hw->my_epid)
1038 continue;
1039 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1040 EP_PARTNER_SHARED)
1041 adapter->hw.ep_shm_info[epidx].tx
1042 .info->v1i.rx_status &=
1043 ~FJES_RX_POLL_WORK;
1044 }
1045 spin_unlock(&hw->rx_status_lock);
1046
1047 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1048 }
1049 }
1050
1051 return work_done;
1052}
1053
1054static int fjes_sw_init(struct fjes_adapter *adapter)
1055{
1056 struct net_device *netdev = adapter->netdev;
1057
1058 netif_napi_add(netdev, &adapter->napi, fjes_poll);
1059
1060 return 0;
1061}
1062
1063static void fjes_force_close_task(struct work_struct *work)
1064{
1065 struct fjes_adapter *adapter = container_of(work,
1066 struct fjes_adapter, force_close_task);
1067 struct net_device *netdev = adapter->netdev;
1068
1069 rtnl_lock();
1070 dev_close(netdev);
1071 rtnl_unlock();
1072}
1073
1074static void fjes_tx_stall_task(struct work_struct *work)
1075{
1076 struct fjes_adapter *adapter = container_of(work,
1077 struct fjes_adapter, tx_stall_task);
1078 struct net_device *netdev = adapter->netdev;
1079 struct fjes_hw *hw = &adapter->hw;
1080 int all_queue_available, sendable;
1081 enum ep_partner_status pstatus;
1082 int max_epid, my_epid, epid;
1083 union ep_buffer_info *info;
1084 int i;
1085
1086 if (((long)jiffies -
1087 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
1088 netif_wake_queue(netdev);
1089 return;
1090 }
1091
1092 my_epid = hw->my_epid;
1093 max_epid = hw->max_epid;
1094
1095 for (i = 0; i < 5; i++) {
1096 all_queue_available = 1;
1097
1098 for (epid = 0; epid < max_epid; epid++) {
1099 if (my_epid == epid)
1100 continue;
1101
1102 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1103 sendable = (pstatus == EP_PARTNER_SHARED);
1104 if (!sendable)
1105 continue;
1106
1107 info = adapter->hw.ep_shm_info[epid].tx.info;
1108
1109 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
1110 return;
1111
1112 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
1113 info->v1i.count_max)) {
1114 all_queue_available = 0;
1115 break;
1116 }
1117 }
1118
1119 if (all_queue_available) {
1120 netif_wake_queue(netdev);
1121 return;
1122 }
1123 }
1124
1125 usleep_range(50, 100);
1126
1127 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
1128}
1129
1130static void fjes_raise_intr_rxdata_task(struct work_struct *work)
1131{
1132 struct fjes_adapter *adapter = container_of(work,
1133 struct fjes_adapter, raise_intr_rxdata_task);
1134 struct fjes_hw *hw = &adapter->hw;
1135 enum ep_partner_status pstatus;
1136 int max_epid, my_epid, epid;
1137
1138 my_epid = hw->my_epid;
1139 max_epid = hw->max_epid;
1140
1141 for (epid = 0; epid < max_epid; epid++)
1142 hw->ep_shm_info[epid].tx_status_work = 0;
1143
1144 for (epid = 0; epid < max_epid; epid++) {
1145 if (epid == my_epid)
1146 continue;
1147
1148 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1149 if (pstatus == EP_PARTNER_SHARED) {
1150 hw->ep_shm_info[epid].tx_status_work =
1151 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
1152
1153 if (hw->ep_shm_info[epid].tx_status_work ==
1154 FJES_TX_DELAY_SEND_PENDING) {
1155 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
1156 FJES_TX_DELAY_SEND_NONE;
1157 }
1158 }
1159 }
1160
1161 for (epid = 0; epid < max_epid; epid++) {
1162 if (epid == my_epid)
1163 continue;
1164
1165 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1166 if ((hw->ep_shm_info[epid].tx_status_work ==
1167 FJES_TX_DELAY_SEND_PENDING) &&
1168 (pstatus == EP_PARTNER_SHARED) &&
1169 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
1170 FJES_RX_POLL_WORK)) {
1171 fjes_hw_raise_interrupt(hw, epid,
1172 REG_ICTL_MASK_RX_DATA);
1173 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
1174 }
1175 }
1176
1177 usleep_range(500, 1000);
1178}
1179
1180static void fjes_watch_unshare_task(struct work_struct *work)
1181{
1182 struct fjes_adapter *adapter =
1183 container_of(work, struct fjes_adapter, unshare_watch_task);
1184
1185 struct net_device *netdev = adapter->netdev;
1186 struct fjes_hw *hw = &adapter->hw;
1187
1188 int unshare_watch, unshare_reserve;
1189 int max_epid, my_epid, epidx;
1190 int stop_req, stop_req_done;
1191 ulong unshare_watch_bitmask;
1192 unsigned long flags;
1193 int wait_time = 0;
1194 int is_shared;
1195 int ret;
1196
1197 my_epid = hw->my_epid;
1198 max_epid = hw->max_epid;
1199
1200 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1201 adapter->unshare_watch_bitmask = 0;
1202
1203 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1204 (wait_time < 3000)) {
1205 for (epidx = 0; epidx < max_epid; epidx++) {
1206 if (epidx == my_epid)
1207 continue;
1208
1209 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1210 epidx);
1211
1212 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1213
1214 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1215 FJES_RX_STOP_REQ_DONE;
1216
1217 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1218
1219 unshare_reserve = test_bit(epidx,
1220 &hw->hw_info.buffer_unshare_reserve_bit);
1221
1222 if ((!stop_req ||
1223 (is_shared && (!is_shared || !stop_req_done))) &&
1224 (is_shared || !unshare_watch || !unshare_reserve))
1225 continue;
1226
1227 mutex_lock(&hw->hw_info.lock);
1228 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1229 switch (ret) {
1230 case 0:
1231 break;
1232 case -ENOMSG:
1233 case -EBUSY:
1234 default:
1235 if (!work_pending(
1236 &adapter->force_close_task)) {
1237 adapter->force_reset = true;
1238 schedule_work(
1239 &adapter->force_close_task);
1240 }
1241 break;
1242 }
1243 mutex_unlock(&hw->hw_info.lock);
1244 hw->ep_shm_info[epidx].ep_stats
1245 .com_unregist_buf_exec += 1;
1246
1247 spin_lock_irqsave(&hw->rx_status_lock, flags);
1248 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1249 netdev->dev_addr, netdev->mtu);
1250 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1251
1252 clear_bit(epidx, &hw->txrx_stop_req_bit);
1253 clear_bit(epidx, &unshare_watch_bitmask);
1254 clear_bit(epidx,
1255 &hw->hw_info.buffer_unshare_reserve_bit);
1256 }
1257
1258 msleep(100);
1259 wait_time += 100;
1260 }
1261
1262 if (hw->hw_info.buffer_unshare_reserve_bit) {
1263 for (epidx = 0; epidx < max_epid; epidx++) {
1264 if (epidx == my_epid)
1265 continue;
1266
1267 if (test_bit(epidx,
1268 &hw->hw_info.buffer_unshare_reserve_bit)) {
1269 mutex_lock(&hw->hw_info.lock);
1270
1271 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1272 switch (ret) {
1273 case 0:
1274 break;
1275 case -ENOMSG:
1276 case -EBUSY:
1277 default:
1278 if (!work_pending(
1279 &adapter->force_close_task)) {
1280 adapter->force_reset = true;
1281 schedule_work(
1282 &adapter->force_close_task);
1283 }
1284 break;
1285 }
1286 mutex_unlock(&hw->hw_info.lock);
1287
1288 hw->ep_shm_info[epidx].ep_stats
1289 .com_unregist_buf_exec += 1;
1290
1291 spin_lock_irqsave(&hw->rx_status_lock, flags);
1292 fjes_hw_setup_epbuf(
1293 &hw->ep_shm_info[epidx].tx,
1294 netdev->dev_addr, netdev->mtu);
1295 spin_unlock_irqrestore(&hw->rx_status_lock,
1296 flags);
1297
1298 clear_bit(epidx, &hw->txrx_stop_req_bit);
1299 clear_bit(epidx, &unshare_watch_bitmask);
1300 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1301 }
1302
1303 if (test_bit(epidx, &unshare_watch_bitmask)) {
1304 spin_lock_irqsave(&hw->rx_status_lock, flags);
1305 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1306 ~FJES_RX_STOP_REQ_DONE;
1307 spin_unlock_irqrestore(&hw->rx_status_lock,
1308 flags);
1309 }
1310 }
1311 }
1312}
1313
1314static void fjes_irq_watch_task(struct work_struct *work)
1315{
1316 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1317 struct fjes_adapter, interrupt_watch_task);
1318
1319 local_irq_disable();
1320 fjes_intr(adapter->hw.hw_res.irq, adapter);
1321 local_irq_enable();
1322
1323 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1324 napi_schedule(&adapter->napi);
1325
1326 if (adapter->interrupt_watch_enable) {
1327 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1328 queue_delayed_work(adapter->control_wq,
1329 &adapter->interrupt_watch_task,
1330 FJES_IRQ_WATCH_DELAY);
1331 }
1332}
1333
1334/* fjes_probe - Device Initialization Routine */
1335static int fjes_probe(struct platform_device *plat_dev)
1336{
1337 struct fjes_adapter *adapter;
1338 struct net_device *netdev;
1339 struct resource *res;
1340 struct fjes_hw *hw;
1341 u8 addr[ETH_ALEN];
1342 int err;
1343
1344 err = -ENOMEM;
1345 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1346 NET_NAME_UNKNOWN, fjes_netdev_setup,
1347 FJES_MAX_QUEUES);
1348
1349 if (!netdev)
1350 goto err_out;
1351
1352 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1353
1354 dev_set_drvdata(&plat_dev->dev, netdev);
1355 adapter = netdev_priv(netdev);
1356 adapter->netdev = netdev;
1357 adapter->plat_dev = plat_dev;
1358 hw = &adapter->hw;
1359 hw->back = adapter;
1360
1361 /* setup the private structure */
1362 err = fjes_sw_init(adapter);
1363 if (err)
1364 goto err_free_netdev;
1365
1366 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1367 adapter->force_reset = false;
1368 adapter->open_guard = false;
1369
1370 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1371 if (unlikely(!adapter->txrx_wq)) {
1372 err = -ENOMEM;
1373 goto err_free_netdev;
1374 }
1375
1376 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1377 WQ_MEM_RECLAIM, 0);
1378 if (unlikely(!adapter->control_wq)) {
1379 err = -ENOMEM;
1380 goto err_free_txrx_wq;
1381 }
1382
1383 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1384 INIT_WORK(&adapter->raise_intr_rxdata_task,
1385 fjes_raise_intr_rxdata_task);
1386 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1387 adapter->unshare_watch_bitmask = 0;
1388
1389 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1390 adapter->interrupt_watch_enable = false;
1391
1392 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1393 if (!res) {
1394 err = -EINVAL;
1395 goto err_free_control_wq;
1396 }
1397 hw->hw_res.start = res->start;
1398 hw->hw_res.size = resource_size(res);
1399 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1400 if (hw->hw_res.irq < 0) {
1401 err = hw->hw_res.irq;
1402 goto err_free_control_wq;
1403 }
1404
1405 err = fjes_hw_init(&adapter->hw);
1406 if (err)
1407 goto err_free_control_wq;
1408
1409 /* setup MAC address (02:00:00:00:00:[epid])*/
1410 addr[0] = 2;
1411 addr[1] = 0;
1412 addr[2] = 0;
1413 addr[3] = 0;
1414 addr[4] = 0;
1415 addr[5] = hw->my_epid; /* EPID */
1416 eth_hw_addr_set(netdev, addr);
1417
1418 err = register_netdev(netdev);
1419 if (err)
1420 goto err_hw_exit;
1421
1422 netif_carrier_off(netdev);
1423
1424 fjes_dbg_adapter_init(adapter);
1425
1426 return 0;
1427
1428err_hw_exit:
1429 fjes_hw_exit(&adapter->hw);
1430err_free_control_wq:
1431 destroy_workqueue(adapter->control_wq);
1432err_free_txrx_wq:
1433 destroy_workqueue(adapter->txrx_wq);
1434err_free_netdev:
1435 free_netdev(netdev);
1436err_out:
1437 return err;
1438}
1439
1440/* fjes_remove - Device Removal Routine */
1441static void fjes_remove(struct platform_device *plat_dev)
1442{
1443 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1444 struct fjes_adapter *adapter = netdev_priv(netdev);
1445 struct fjes_hw *hw = &adapter->hw;
1446
1447 fjes_dbg_adapter_exit(adapter);
1448
1449 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1450 cancel_work_sync(&adapter->unshare_watch_task);
1451 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1452 cancel_work_sync(&adapter->tx_stall_task);
1453 if (adapter->control_wq)
1454 destroy_workqueue(adapter->control_wq);
1455 if (adapter->txrx_wq)
1456 destroy_workqueue(adapter->txrx_wq);
1457
1458 unregister_netdev(netdev);
1459
1460 fjes_hw_exit(hw);
1461
1462 netif_napi_del(&adapter->napi);
1463
1464 free_netdev(netdev);
1465}
1466
1467static struct platform_driver fjes_driver = {
1468 .driver = {
1469 .name = DRV_NAME,
1470 },
1471 .probe = fjes_probe,
1472 .remove_new = fjes_remove,
1473};
1474
1475static acpi_status
1476acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1477 void *context, void **return_value)
1478{
1479 struct acpi_device *device;
1480 bool *found = context;
1481
1482 device = acpi_fetch_acpi_dev(obj_handle);
1483 if (!device)
1484 return AE_OK;
1485
1486 if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1487 return AE_OK;
1488
1489 if (!is_extended_socket_device(device))
1490 return AE_OK;
1491
1492 if (acpi_check_extended_socket_status(device))
1493 return AE_OK;
1494
1495 *found = true;
1496 return AE_CTRL_TERMINATE;
1497}
1498
1499/* fjes_init_module - Driver Registration Routine */
1500static int __init fjes_init_module(void)
1501{
1502 bool found = false;
1503 int result;
1504
1505 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1506 acpi_find_extended_socket_device, NULL, &found,
1507 NULL);
1508
1509 if (!found)
1510 return -ENODEV;
1511
1512 pr_info("%s - version %s - %s\n",
1513 fjes_driver_string, fjes_driver_version, fjes_copyright);
1514
1515 fjes_dbg_init();
1516
1517 result = platform_driver_register(&fjes_driver);
1518 if (result < 0) {
1519 fjes_dbg_exit();
1520 return result;
1521 }
1522
1523 result = acpi_bus_register_driver(&fjes_acpi_driver);
1524 if (result < 0)
1525 goto fail_acpi_driver;
1526
1527 return 0;
1528
1529fail_acpi_driver:
1530 platform_driver_unregister(&fjes_driver);
1531 fjes_dbg_exit();
1532 return result;
1533}
1534
1535module_init(fjes_init_module);
1536
1537/* fjes_exit_module - Driver Exit Cleanup Routine */
1538static void __exit fjes_exit_module(void)
1539{
1540 acpi_bus_unregister_driver(&fjes_acpi_driver);
1541 platform_driver_unregister(&fjes_driver);
1542 fjes_dbg_exit();
1543}
1544
1545module_exit(fjes_exit_module);
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"
36char fjes_driver_name[] = DRV_NAME;
37char fjes_driver_version[] = DRV_VERSION;
38static const char fjes_driver_string[] =
39 "FUJITSU Extended Socket Network Device Driver";
40static const char fjes_copyright[] =
41 "Copyright (c) 2015 FUJITSU LIMITED";
42
43MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
44MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
45MODULE_LICENSE("GPL");
46MODULE_VERSION(DRV_VERSION);
47
48static int fjes_request_irq(struct fjes_adapter *);
49static void fjes_free_irq(struct fjes_adapter *);
50
51static int fjes_open(struct net_device *);
52static int fjes_close(struct net_device *);
53static int fjes_setup_resources(struct fjes_adapter *);
54static void fjes_free_resources(struct fjes_adapter *);
55static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
56static void fjes_raise_intr_rxdata_task(struct work_struct *);
57static void fjes_tx_stall_task(struct work_struct *);
58static void fjes_force_close_task(struct work_struct *);
59static irqreturn_t fjes_intr(int, void*);
60static struct rtnl_link_stats64 *
61fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
62static int fjes_change_mtu(struct net_device *, int);
63static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
64static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
65static void fjes_tx_retry(struct net_device *);
66
67static int fjes_acpi_add(struct acpi_device *);
68static int fjes_acpi_remove(struct acpi_device *);
69static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
70
71static int fjes_probe(struct platform_device *);
72static int fjes_remove(struct platform_device *);
73
74static int fjes_sw_init(struct fjes_adapter *);
75static void fjes_netdev_setup(struct net_device *);
76static void fjes_irq_watch_task(struct work_struct *);
77static void fjes_watch_unshare_task(struct work_struct *);
78static void fjes_rx_irq(struct fjes_adapter *, int);
79static int fjes_poll(struct napi_struct *, int);
80
81static const struct acpi_device_id fjes_acpi_ids[] = {
82 {"PNP0C02", 0},
83 {"", 0},
84};
85MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
86
87static struct acpi_driver fjes_acpi_driver = {
88 .name = DRV_NAME,
89 .class = DRV_NAME,
90 .owner = THIS_MODULE,
91 .ids = fjes_acpi_ids,
92 .ops = {
93 .add = fjes_acpi_add,
94 .remove = fjes_acpi_remove,
95 },
96};
97
98static struct platform_driver fjes_driver = {
99 .driver = {
100 .name = DRV_NAME,
101 },
102 .probe = fjes_probe,
103 .remove = fjes_remove,
104};
105
106static 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
119static 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
157static 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
167static acpi_status
168fjes_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
197static 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
221static 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
236static 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 */
248static 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
279err_req_irq:
280 fjes_free_irq(adapter);
281 napi_disable(&adapter->napi);
282
283err_setup_res:
284 fjes_free_resources(adapter);
285 return result;
286}
287
288/* fjes_close - Disables a network interface */
289static 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
334static int fjes_setup_resources(struct fjes_adapter *adapter)
335{
336 struct net_device *netdev = adapter->netdev;
337 struct ep_share_mem_info *buf_pair;
338 struct fjes_hw *hw = &adapter->hw;
339 unsigned long flags;
340 int result;
341 int epidx;
342
343 mutex_lock(&hw->hw_info.lock);
344 result = fjes_hw_request_info(hw);
345 switch (result) {
346 case 0:
347 for (epidx = 0; epidx < hw->max_epid; epidx++) {
348 hw->ep_shm_info[epidx].es_status =
349 hw->hw_info.res_buf->info.info[epidx].es_status;
350 hw->ep_shm_info[epidx].zone =
351 hw->hw_info.res_buf->info.info[epidx].zone;
352 }
353 break;
354 default:
355 case -ENOMSG:
356 case -EBUSY:
357 adapter->force_reset = true;
358
359 mutex_unlock(&hw->hw_info.lock);
360 return result;
361 }
362 mutex_unlock(&hw->hw_info.lock);
363
364 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
365 if ((epidx != hw->my_epid) &&
366 (hw->ep_shm_info[epidx].es_status ==
367 FJES_ZONING_STATUS_ENABLE)) {
368 fjes_hw_raise_interrupt(hw, epidx,
369 REG_ICTL_MASK_INFO_UPDATE);
370 hw->ep_shm_info[epidx].ep_stats
371 .send_intr_zoneupdate += 1;
372 }
373 }
374
375 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
376
377 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
378 if (epidx == hw->my_epid)
379 continue;
380
381 buf_pair = &hw->ep_shm_info[epidx];
382
383 spin_lock_irqsave(&hw->rx_status_lock, flags);
384 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
385 netdev->mtu);
386 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
387
388 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
389 mutex_lock(&hw->hw_info.lock);
390 result =
391 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
392 mutex_unlock(&hw->hw_info.lock);
393
394 switch (result) {
395 case 0:
396 break;
397 case -ENOMSG:
398 case -EBUSY:
399 default:
400 adapter->force_reset = true;
401 return result;
402 }
403
404 hw->ep_shm_info[epidx].ep_stats
405 .com_regist_buf_exec += 1;
406 }
407 }
408
409 return 0;
410}
411
412static void fjes_free_resources(struct fjes_adapter *adapter)
413{
414 struct net_device *netdev = adapter->netdev;
415 struct fjes_device_command_param param;
416 struct ep_share_mem_info *buf_pair;
417 struct fjes_hw *hw = &adapter->hw;
418 bool reset_flag = false;
419 unsigned long flags;
420 int result;
421 int epidx;
422
423 for (epidx = 0; epidx < hw->max_epid; epidx++) {
424 if (epidx == hw->my_epid)
425 continue;
426
427 mutex_lock(&hw->hw_info.lock);
428 result = fjes_hw_unregister_buff_addr(hw, epidx);
429 mutex_unlock(&hw->hw_info.lock);
430
431 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
432
433 if (result)
434 reset_flag = true;
435
436 buf_pair = &hw->ep_shm_info[epidx];
437
438 spin_lock_irqsave(&hw->rx_status_lock, flags);
439 fjes_hw_setup_epbuf(&buf_pair->tx,
440 netdev->dev_addr, netdev->mtu);
441 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
442
443 clear_bit(epidx, &hw->txrx_stop_req_bit);
444 }
445
446 if (reset_flag || adapter->force_reset) {
447 result = fjes_hw_reset(hw);
448
449 adapter->force_reset = false;
450
451 if (result)
452 adapter->open_guard = true;
453
454 hw->hw_info.buffer_share_bit = 0;
455
456 memset((void *)¶m, 0, sizeof(param));
457
458 param.req_len = hw->hw_info.req_buf_size;
459 param.req_start = __pa(hw->hw_info.req_buf);
460 param.res_len = hw->hw_info.res_buf_size;
461 param.res_start = __pa(hw->hw_info.res_buf);
462 param.share_start = __pa(hw->hw_info.share->ep_status);
463
464 fjes_hw_init_command_registers(hw, ¶m);
465 }
466}
467
468static void fjes_tx_stall_task(struct work_struct *work)
469{
470 struct fjes_adapter *adapter = container_of(work,
471 struct fjes_adapter, tx_stall_task);
472 struct net_device *netdev = adapter->netdev;
473 struct fjes_hw *hw = &adapter->hw;
474 int all_queue_available, sendable;
475 enum ep_partner_status pstatus;
476 int max_epid, my_epid, epid;
477 union ep_buffer_info *info;
478 int i;
479
480 if (((long)jiffies -
481 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
482 netif_wake_queue(netdev);
483 return;
484 }
485
486 my_epid = hw->my_epid;
487 max_epid = hw->max_epid;
488
489 for (i = 0; i < 5; i++) {
490 all_queue_available = 1;
491
492 for (epid = 0; epid < max_epid; epid++) {
493 if (my_epid == epid)
494 continue;
495
496 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
497 sendable = (pstatus == EP_PARTNER_SHARED);
498 if (!sendable)
499 continue;
500
501 info = adapter->hw.ep_shm_info[epid].tx.info;
502
503 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
504 return;
505
506 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
507 info->v1i.count_max)) {
508 all_queue_available = 0;
509 break;
510 }
511 }
512
513 if (all_queue_available) {
514 netif_wake_queue(netdev);
515 return;
516 }
517 }
518
519 usleep_range(50, 100);
520
521 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
522}
523
524static void fjes_force_close_task(struct work_struct *work)
525{
526 struct fjes_adapter *adapter = container_of(work,
527 struct fjes_adapter, force_close_task);
528 struct net_device *netdev = adapter->netdev;
529
530 rtnl_lock();
531 dev_close(netdev);
532 rtnl_unlock();
533}
534
535static void fjes_raise_intr_rxdata_task(struct work_struct *work)
536{
537 struct fjes_adapter *adapter = container_of(work,
538 struct fjes_adapter, raise_intr_rxdata_task);
539 struct fjes_hw *hw = &adapter->hw;
540 enum ep_partner_status pstatus;
541 int max_epid, my_epid, epid;
542
543 my_epid = hw->my_epid;
544 max_epid = hw->max_epid;
545
546 for (epid = 0; epid < max_epid; epid++)
547 hw->ep_shm_info[epid].tx_status_work = 0;
548
549 for (epid = 0; epid < max_epid; epid++) {
550 if (epid == my_epid)
551 continue;
552
553 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
554 if (pstatus == EP_PARTNER_SHARED) {
555 hw->ep_shm_info[epid].tx_status_work =
556 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
557
558 if (hw->ep_shm_info[epid].tx_status_work ==
559 FJES_TX_DELAY_SEND_PENDING) {
560 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
561 FJES_TX_DELAY_SEND_NONE;
562 }
563 }
564 }
565
566 for (epid = 0; epid < max_epid; epid++) {
567 if (epid == my_epid)
568 continue;
569
570 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
571 if ((hw->ep_shm_info[epid].tx_status_work ==
572 FJES_TX_DELAY_SEND_PENDING) &&
573 (pstatus == EP_PARTNER_SHARED) &&
574 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
575 FJES_RX_POLL_WORK)) {
576 fjes_hw_raise_interrupt(hw, epid,
577 REG_ICTL_MASK_RX_DATA);
578 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
579 }
580 }
581
582 usleep_range(500, 1000);
583}
584
585static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
586 void *data, size_t len)
587{
588 int retval;
589
590 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
591 data, len);
592 if (retval)
593 return retval;
594
595 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
596 FJES_TX_DELAY_SEND_PENDING;
597 if (!work_pending(&adapter->raise_intr_rxdata_task))
598 queue_work(adapter->txrx_wq,
599 &adapter->raise_intr_rxdata_task);
600
601 retval = 0;
602 return retval;
603}
604
605static netdev_tx_t
606fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
607{
608 struct fjes_adapter *adapter = netdev_priv(netdev);
609 struct fjes_hw *hw = &adapter->hw;
610
611 int max_epid, my_epid, dest_epid;
612 enum ep_partner_status pstatus;
613 struct netdev_queue *cur_queue;
614 char shortpkt[VLAN_ETH_HLEN];
615 bool is_multi, vlan;
616 struct ethhdr *eth;
617 u16 queue_no = 0;
618 u16 vlan_id = 0;
619 netdev_tx_t ret;
620 char *data;
621 int len;
622
623 ret = NETDEV_TX_OK;
624 is_multi = false;
625 cur_queue = netdev_get_tx_queue(netdev, queue_no);
626
627 eth = (struct ethhdr *)skb->data;
628 my_epid = hw->my_epid;
629
630 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
631
632 data = skb->data;
633 len = skb->len;
634
635 if (is_multicast_ether_addr(eth->h_dest)) {
636 dest_epid = 0;
637 max_epid = hw->max_epid;
638 is_multi = true;
639 } else if (is_local_ether_addr(eth->h_dest)) {
640 dest_epid = eth->h_dest[ETH_ALEN - 1];
641 max_epid = dest_epid + 1;
642
643 if ((eth->h_dest[0] == 0x02) &&
644 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
645 eth->h_dest[3] | eth->h_dest[4])) &&
646 (dest_epid < hw->max_epid)) {
647 ;
648 } else {
649 dest_epid = 0;
650 max_epid = 0;
651 ret = NETDEV_TX_OK;
652
653 adapter->stats64.tx_packets += 1;
654 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
655 adapter->stats64.tx_bytes += len;
656 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
657 }
658 } else {
659 dest_epid = 0;
660 max_epid = 0;
661 ret = NETDEV_TX_OK;
662
663 adapter->stats64.tx_packets += 1;
664 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
665 adapter->stats64.tx_bytes += len;
666 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
667 }
668
669 for (; dest_epid < max_epid; dest_epid++) {
670 if (my_epid == dest_epid)
671 continue;
672
673 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
674 if (pstatus != EP_PARTNER_SHARED) {
675 if (!is_multi)
676 hw->ep_shm_info[dest_epid].ep_stats
677 .tx_dropped_not_shared += 1;
678 ret = NETDEV_TX_OK;
679 } else if (!fjes_hw_check_epbuf_version(
680 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
681 /* version is NOT 0 */
682 adapter->stats64.tx_carrier_errors += 1;
683 hw->ep_shm_info[dest_epid].net_stats
684 .tx_carrier_errors += 1;
685 hw->ep_shm_info[dest_epid].ep_stats
686 .tx_dropped_ver_mismatch += 1;
687
688 ret = NETDEV_TX_OK;
689 } else if (!fjes_hw_check_mtu(
690 &adapter->hw.ep_shm_info[dest_epid].rx,
691 netdev->mtu)) {
692 adapter->stats64.tx_dropped += 1;
693 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
694 adapter->stats64.tx_errors += 1;
695 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
696 hw->ep_shm_info[dest_epid].ep_stats
697 .tx_dropped_buf_size_mismatch += 1;
698
699 ret = NETDEV_TX_OK;
700 } else if (vlan &&
701 !fjes_hw_check_vlan_id(
702 &adapter->hw.ep_shm_info[dest_epid].rx,
703 vlan_id)) {
704 hw->ep_shm_info[dest_epid].ep_stats
705 .tx_dropped_vlanid_mismatch += 1;
706 ret = NETDEV_TX_OK;
707 } else {
708 if (len < VLAN_ETH_HLEN) {
709 memset(shortpkt, 0, VLAN_ETH_HLEN);
710 memcpy(shortpkt, skb->data, skb->len);
711 len = VLAN_ETH_HLEN;
712 data = shortpkt;
713 }
714
715 if (adapter->tx_retry_count == 0) {
716 adapter->tx_start_jiffies = jiffies;
717 adapter->tx_retry_count = 1;
718 } else {
719 adapter->tx_retry_count++;
720 }
721
722 if (fjes_tx_send(adapter, dest_epid, data, len)) {
723 if (is_multi) {
724 ret = NETDEV_TX_OK;
725 } else if (
726 ((long)jiffies -
727 (long)adapter->tx_start_jiffies) >=
728 FJES_TX_RETRY_TIMEOUT) {
729 adapter->stats64.tx_fifo_errors += 1;
730 hw->ep_shm_info[dest_epid].net_stats
731 .tx_fifo_errors += 1;
732 adapter->stats64.tx_errors += 1;
733 hw->ep_shm_info[dest_epid].net_stats
734 .tx_errors += 1;
735
736 ret = NETDEV_TX_OK;
737 } else {
738 netif_trans_update(netdev);
739 hw->ep_shm_info[dest_epid].ep_stats
740 .tx_buffer_full += 1;
741 netif_tx_stop_queue(cur_queue);
742
743 if (!work_pending(&adapter->tx_stall_task))
744 queue_work(adapter->txrx_wq,
745 &adapter->tx_stall_task);
746
747 ret = NETDEV_TX_BUSY;
748 }
749 } else {
750 if (!is_multi) {
751 adapter->stats64.tx_packets += 1;
752 hw->ep_shm_info[dest_epid].net_stats
753 .tx_packets += 1;
754 adapter->stats64.tx_bytes += len;
755 hw->ep_shm_info[dest_epid].net_stats
756 .tx_bytes += len;
757 }
758
759 adapter->tx_retry_count = 0;
760 ret = NETDEV_TX_OK;
761 }
762 }
763 }
764
765 if (ret == NETDEV_TX_OK) {
766 dev_kfree_skb(skb);
767 if (is_multi) {
768 adapter->stats64.tx_packets += 1;
769 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
770 adapter->stats64.tx_bytes += 1;
771 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
772 }
773 }
774
775 return ret;
776}
777
778static void fjes_tx_retry(struct net_device *netdev)
779{
780 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
781
782 netif_tx_wake_queue(queue);
783}
784
785static struct rtnl_link_stats64 *
786fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
787{
788 struct fjes_adapter *adapter = netdev_priv(netdev);
789
790 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
791
792 return stats;
793}
794
795static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
796{
797 struct fjes_adapter *adapter = netdev_priv(netdev);
798 bool running = netif_running(netdev);
799 struct fjes_hw *hw = &adapter->hw;
800 unsigned long flags;
801 int ret = -EINVAL;
802 int idx, epidx;
803
804 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
805 if (new_mtu <= fjes_support_mtu[idx]) {
806 new_mtu = fjes_support_mtu[idx];
807 if (new_mtu == netdev->mtu)
808 return 0;
809
810 ret = 0;
811 break;
812 }
813 }
814
815 if (ret)
816 return ret;
817
818 if (running) {
819 spin_lock_irqsave(&hw->rx_status_lock, flags);
820 for (epidx = 0; epidx < hw->max_epid; epidx++) {
821 if (epidx == hw->my_epid)
822 continue;
823 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
824 ~FJES_RX_MTU_CHANGING_DONE;
825 }
826 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
827
828 netif_tx_stop_all_queues(netdev);
829 netif_carrier_off(netdev);
830 cancel_work_sync(&adapter->tx_stall_task);
831 napi_disable(&adapter->napi);
832
833 msleep(1000);
834
835 netif_tx_stop_all_queues(netdev);
836 }
837
838 netdev->mtu = new_mtu;
839
840 if (running) {
841 for (epidx = 0; epidx < hw->max_epid; epidx++) {
842 if (epidx == hw->my_epid)
843 continue;
844
845 spin_lock_irqsave(&hw->rx_status_lock, flags);
846 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
847 netdev->dev_addr,
848 netdev->mtu);
849
850 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
851 FJES_RX_MTU_CHANGING_DONE;
852 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
853 }
854
855 netif_tx_wake_all_queues(netdev);
856 netif_carrier_on(netdev);
857 napi_enable(&adapter->napi);
858 napi_schedule(&adapter->napi);
859 }
860
861 return ret;
862}
863
864static int fjes_vlan_rx_add_vid(struct net_device *netdev,
865 __be16 proto, u16 vid)
866{
867 struct fjes_adapter *adapter = netdev_priv(netdev);
868 bool ret = true;
869 int epid;
870
871 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
872 if (epid == adapter->hw.my_epid)
873 continue;
874
875 if (!fjes_hw_check_vlan_id(
876 &adapter->hw.ep_shm_info[epid].tx, vid))
877 ret = fjes_hw_set_vlan_id(
878 &adapter->hw.ep_shm_info[epid].tx, vid);
879 }
880
881 return ret ? 0 : -ENOSPC;
882}
883
884static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
885 __be16 proto, u16 vid)
886{
887 struct fjes_adapter *adapter = netdev_priv(netdev);
888 int epid;
889
890 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
891 if (epid == adapter->hw.my_epid)
892 continue;
893
894 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
895 }
896
897 return 0;
898}
899
900static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
901 int src_epid)
902{
903 struct fjes_hw *hw = &adapter->hw;
904 enum ep_partner_status status;
905 unsigned long flags;
906
907 status = fjes_hw_get_partner_ep_status(hw, src_epid);
908 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
909 switch (status) {
910 case EP_PARTNER_UNSHARE:
911 case EP_PARTNER_COMPLETE:
912 default:
913 break;
914 case EP_PARTNER_WAITING:
915 if (src_epid < hw->my_epid) {
916 spin_lock_irqsave(&hw->rx_status_lock, flags);
917 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
918 FJES_RX_STOP_REQ_DONE;
919 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
920
921 clear_bit(src_epid, &hw->txrx_stop_req_bit);
922 set_bit(src_epid, &adapter->unshare_watch_bitmask);
923
924 if (!work_pending(&adapter->unshare_watch_task))
925 queue_work(adapter->control_wq,
926 &adapter->unshare_watch_task);
927 }
928 break;
929 case EP_PARTNER_SHARED:
930 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
931 FJES_RX_STOP_REQ_REQUEST) {
932 set_bit(src_epid, &hw->epstop_req_bit);
933 if (!work_pending(&hw->epstop_task))
934 queue_work(adapter->control_wq,
935 &hw->epstop_task);
936 }
937 break;
938 }
939 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
940}
941
942static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
943{
944 struct fjes_hw *hw = &adapter->hw;
945 enum ep_partner_status status;
946 unsigned long flags;
947
948 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
949
950 status = fjes_hw_get_partner_ep_status(hw, src_epid);
951 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
952 switch (status) {
953 case EP_PARTNER_WAITING:
954 spin_lock_irqsave(&hw->rx_status_lock, flags);
955 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
956 FJES_RX_STOP_REQ_DONE;
957 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
958 clear_bit(src_epid, &hw->txrx_stop_req_bit);
959 /* fall through */
960 case EP_PARTNER_UNSHARE:
961 case EP_PARTNER_COMPLETE:
962 default:
963 set_bit(src_epid, &adapter->unshare_watch_bitmask);
964 if (!work_pending(&adapter->unshare_watch_task))
965 queue_work(adapter->control_wq,
966 &adapter->unshare_watch_task);
967 break;
968 case EP_PARTNER_SHARED:
969 set_bit(src_epid, &hw->epstop_req_bit);
970
971 if (!work_pending(&hw->epstop_task))
972 queue_work(adapter->control_wq, &hw->epstop_task);
973 break;
974 }
975 trace_fjes_stop_req_irq_post(hw, src_epid);
976}
977
978static void fjes_update_zone_irq(struct fjes_adapter *adapter,
979 int src_epid)
980{
981 struct fjes_hw *hw = &adapter->hw;
982
983 if (!work_pending(&hw->update_zone_task))
984 queue_work(adapter->control_wq, &hw->update_zone_task);
985}
986
987static irqreturn_t fjes_intr(int irq, void *data)
988{
989 struct fjes_adapter *adapter = data;
990 struct fjes_hw *hw = &adapter->hw;
991 irqreturn_t ret;
992 u32 icr;
993
994 icr = fjes_hw_capture_interrupt_status(hw);
995
996 if (icr & REG_IS_MASK_IS_ASSERT) {
997 if (icr & REG_ICTL_MASK_RX_DATA) {
998 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
999 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1000 .recv_intr_rx += 1;
1001 }
1002
1003 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
1004 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1005 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1006 .recv_intr_stop += 1;
1007 }
1008
1009 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1010 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1011 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1012 .recv_intr_unshare += 1;
1013 }
1014
1015 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
1016 fjes_hw_set_irqmask(hw,
1017 REG_ICTL_MASK_TXRX_STOP_DONE, true);
1018
1019 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
1020 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
1021 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1022 .recv_intr_zoneupdate += 1;
1023 }
1024
1025 ret = IRQ_HANDLED;
1026 } else {
1027 ret = IRQ_NONE;
1028 }
1029
1030 return ret;
1031}
1032
1033static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1034 int start_epid)
1035{
1036 struct fjes_hw *hw = &adapter->hw;
1037 enum ep_partner_status pstatus;
1038 int max_epid, cur_epid;
1039 int i;
1040
1041 max_epid = hw->max_epid;
1042 start_epid = (start_epid + 1 + max_epid) % max_epid;
1043
1044 for (i = 0; i < max_epid; i++) {
1045 cur_epid = (start_epid + i) % max_epid;
1046 if (cur_epid == hw->my_epid)
1047 continue;
1048
1049 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1050 if (pstatus == EP_PARTNER_SHARED) {
1051 if (!fjes_hw_epbuf_rx_is_empty(
1052 &hw->ep_shm_info[cur_epid].rx))
1053 return cur_epid;
1054 }
1055 }
1056 return -1;
1057}
1058
1059static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1060 int *cur_epid)
1061{
1062 void *frame;
1063
1064 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1065 if (*cur_epid < 0)
1066 return NULL;
1067
1068 frame =
1069 fjes_hw_epbuf_rx_curpkt_get_addr(
1070 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1071
1072 return frame;
1073}
1074
1075static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1076{
1077 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1078}
1079
1080static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1081{
1082 struct fjes_hw *hw = &adapter->hw;
1083
1084 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1085
1086 adapter->unset_rx_last = true;
1087 napi_schedule(&adapter->napi);
1088}
1089
1090static int fjes_poll(struct napi_struct *napi, int budget)
1091{
1092 struct fjes_adapter *adapter =
1093 container_of(napi, struct fjes_adapter, napi);
1094 struct net_device *netdev = napi->dev;
1095 struct fjes_hw *hw = &adapter->hw;
1096 struct sk_buff *skb;
1097 int work_done = 0;
1098 int cur_epid = 0;
1099 int epidx;
1100 size_t frame_len;
1101 void *frame;
1102
1103 spin_lock(&hw->rx_status_lock);
1104 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1105 if (epidx == hw->my_epid)
1106 continue;
1107
1108 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1109 EP_PARTNER_SHARED)
1110 adapter->hw.ep_shm_info[epidx]
1111 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1112 }
1113 spin_unlock(&hw->rx_status_lock);
1114
1115 while (work_done < budget) {
1116 prefetch(&adapter->hw);
1117 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1118
1119 if (frame) {
1120 skb = napi_alloc_skb(napi, frame_len);
1121 if (!skb) {
1122 adapter->stats64.rx_dropped += 1;
1123 hw->ep_shm_info[cur_epid].net_stats
1124 .rx_dropped += 1;
1125 adapter->stats64.rx_errors += 1;
1126 hw->ep_shm_info[cur_epid].net_stats
1127 .rx_errors += 1;
1128 } else {
1129 memcpy(skb_put(skb, frame_len),
1130 frame, frame_len);
1131 skb->protocol = eth_type_trans(skb, netdev);
1132 skb->ip_summed = CHECKSUM_UNNECESSARY;
1133
1134 netif_receive_skb(skb);
1135
1136 work_done++;
1137
1138 adapter->stats64.rx_packets += 1;
1139 hw->ep_shm_info[cur_epid].net_stats
1140 .rx_packets += 1;
1141 adapter->stats64.rx_bytes += frame_len;
1142 hw->ep_shm_info[cur_epid].net_stats
1143 .rx_bytes += frame_len;
1144
1145 if (is_multicast_ether_addr(
1146 ((struct ethhdr *)frame)->h_dest)) {
1147 adapter->stats64.multicast += 1;
1148 hw->ep_shm_info[cur_epid].net_stats
1149 .multicast += 1;
1150 }
1151 }
1152
1153 fjes_rxframe_release(adapter, cur_epid);
1154 adapter->unset_rx_last = true;
1155 } else {
1156 break;
1157 }
1158 }
1159
1160 if (work_done < budget) {
1161 napi_complete(napi);
1162
1163 if (adapter->unset_rx_last) {
1164 adapter->rx_last_jiffies = jiffies;
1165 adapter->unset_rx_last = false;
1166 }
1167
1168 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1169 napi_reschedule(napi);
1170 } else {
1171 spin_lock(&hw->rx_status_lock);
1172 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1173 if (epidx == hw->my_epid)
1174 continue;
1175 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1176 EP_PARTNER_SHARED)
1177 adapter->hw.ep_shm_info[epidx].tx
1178 .info->v1i.rx_status &=
1179 ~FJES_RX_POLL_WORK;
1180 }
1181 spin_unlock(&hw->rx_status_lock);
1182
1183 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1184 }
1185 }
1186
1187 return work_done;
1188}
1189
1190/* fjes_probe - Device Initialization Routine */
1191static int fjes_probe(struct platform_device *plat_dev)
1192{
1193 struct fjes_adapter *adapter;
1194 struct net_device *netdev;
1195 struct resource *res;
1196 struct fjes_hw *hw;
1197 int err;
1198
1199 err = -ENOMEM;
1200 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1201 NET_NAME_UNKNOWN, fjes_netdev_setup,
1202 FJES_MAX_QUEUES);
1203
1204 if (!netdev)
1205 goto err_out;
1206
1207 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1208
1209 dev_set_drvdata(&plat_dev->dev, netdev);
1210 adapter = netdev_priv(netdev);
1211 adapter->netdev = netdev;
1212 adapter->plat_dev = plat_dev;
1213 hw = &adapter->hw;
1214 hw->back = adapter;
1215
1216 /* setup the private structure */
1217 err = fjes_sw_init(adapter);
1218 if (err)
1219 goto err_free_netdev;
1220
1221 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1222 adapter->force_reset = false;
1223 adapter->open_guard = false;
1224
1225 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1226 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1227 WQ_MEM_RECLAIM, 0);
1228
1229 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1230 INIT_WORK(&adapter->raise_intr_rxdata_task,
1231 fjes_raise_intr_rxdata_task);
1232 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1233 adapter->unshare_watch_bitmask = 0;
1234
1235 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1236 adapter->interrupt_watch_enable = false;
1237
1238 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1239 hw->hw_res.start = res->start;
1240 hw->hw_res.size = resource_size(res);
1241 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1242 err = fjes_hw_init(&adapter->hw);
1243 if (err)
1244 goto err_free_netdev;
1245
1246 /* setup MAC address (02:00:00:00:00:[epid])*/
1247 netdev->dev_addr[0] = 2;
1248 netdev->dev_addr[1] = 0;
1249 netdev->dev_addr[2] = 0;
1250 netdev->dev_addr[3] = 0;
1251 netdev->dev_addr[4] = 0;
1252 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1253
1254 err = register_netdev(netdev);
1255 if (err)
1256 goto err_hw_exit;
1257
1258 netif_carrier_off(netdev);
1259
1260 fjes_dbg_adapter_init(adapter);
1261
1262 return 0;
1263
1264err_hw_exit:
1265 fjes_hw_exit(&adapter->hw);
1266err_free_netdev:
1267 free_netdev(netdev);
1268err_out:
1269 return err;
1270}
1271
1272/* fjes_remove - Device Removal Routine */
1273static int fjes_remove(struct platform_device *plat_dev)
1274{
1275 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1276 struct fjes_adapter *adapter = netdev_priv(netdev);
1277 struct fjes_hw *hw = &adapter->hw;
1278
1279 fjes_dbg_adapter_exit(adapter);
1280
1281 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1282 cancel_work_sync(&adapter->unshare_watch_task);
1283 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1284 cancel_work_sync(&adapter->tx_stall_task);
1285 if (adapter->control_wq)
1286 destroy_workqueue(adapter->control_wq);
1287 if (adapter->txrx_wq)
1288 destroy_workqueue(adapter->txrx_wq);
1289
1290 unregister_netdev(netdev);
1291
1292 fjes_hw_exit(hw);
1293
1294 netif_napi_del(&adapter->napi);
1295
1296 free_netdev(netdev);
1297
1298 return 0;
1299}
1300
1301static int fjes_sw_init(struct fjes_adapter *adapter)
1302{
1303 struct net_device *netdev = adapter->netdev;
1304
1305 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1306
1307 return 0;
1308}
1309
1310/* fjes_netdev_setup - netdevice initialization routine */
1311static void fjes_netdev_setup(struct net_device *netdev)
1312{
1313 ether_setup(netdev);
1314
1315 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1316 netdev->netdev_ops = &fjes_netdev_ops;
1317 fjes_set_ethtool_ops(netdev);
1318 netdev->mtu = fjes_support_mtu[3];
1319 netdev->min_mtu = fjes_support_mtu[0];
1320 netdev->max_mtu = fjes_support_mtu[3];
1321 netdev->flags |= IFF_BROADCAST;
1322 netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
1323}
1324
1325static void fjes_irq_watch_task(struct work_struct *work)
1326{
1327 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1328 struct fjes_adapter, interrupt_watch_task);
1329
1330 local_irq_disable();
1331 fjes_intr(adapter->hw.hw_res.irq, adapter);
1332 local_irq_enable();
1333
1334 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1335 napi_schedule(&adapter->napi);
1336
1337 if (adapter->interrupt_watch_enable) {
1338 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1339 queue_delayed_work(adapter->control_wq,
1340 &adapter->interrupt_watch_task,
1341 FJES_IRQ_WATCH_DELAY);
1342 }
1343}
1344
1345static void fjes_watch_unshare_task(struct work_struct *work)
1346{
1347 struct fjes_adapter *adapter =
1348 container_of(work, struct fjes_adapter, unshare_watch_task);
1349
1350 struct net_device *netdev = adapter->netdev;
1351 struct fjes_hw *hw = &adapter->hw;
1352
1353 int unshare_watch, unshare_reserve;
1354 int max_epid, my_epid, epidx;
1355 int stop_req, stop_req_done;
1356 ulong unshare_watch_bitmask;
1357 unsigned long flags;
1358 int wait_time = 0;
1359 int is_shared;
1360 int ret;
1361
1362 my_epid = hw->my_epid;
1363 max_epid = hw->max_epid;
1364
1365 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1366 adapter->unshare_watch_bitmask = 0;
1367
1368 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1369 (wait_time < 3000)) {
1370 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1371 if (epidx == hw->my_epid)
1372 continue;
1373
1374 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1375 epidx);
1376
1377 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1378
1379 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1380 FJES_RX_STOP_REQ_DONE;
1381
1382 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1383
1384 unshare_reserve = test_bit(epidx,
1385 &hw->hw_info.buffer_unshare_reserve_bit);
1386
1387 if ((!stop_req ||
1388 (is_shared && (!is_shared || !stop_req_done))) &&
1389 (is_shared || !unshare_watch || !unshare_reserve))
1390 continue;
1391
1392 mutex_lock(&hw->hw_info.lock);
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 hw->ep_shm_info[epidx].ep_stats
1410 .com_unregist_buf_exec += 1;
1411
1412 spin_lock_irqsave(&hw->rx_status_lock, flags);
1413 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1414 netdev->dev_addr, netdev->mtu);
1415 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1416
1417 clear_bit(epidx, &hw->txrx_stop_req_bit);
1418 clear_bit(epidx, &unshare_watch_bitmask);
1419 clear_bit(epidx,
1420 &hw->hw_info.buffer_unshare_reserve_bit);
1421 }
1422
1423 msleep(100);
1424 wait_time += 100;
1425 }
1426
1427 if (hw->hw_info.buffer_unshare_reserve_bit) {
1428 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1429 if (epidx == hw->my_epid)
1430 continue;
1431
1432 if (test_bit(epidx,
1433 &hw->hw_info.buffer_unshare_reserve_bit)) {
1434 mutex_lock(&hw->hw_info.lock);
1435
1436 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1437 switch (ret) {
1438 case 0:
1439 break;
1440 case -ENOMSG:
1441 case -EBUSY:
1442 default:
1443 if (!work_pending(
1444 &adapter->force_close_task)) {
1445 adapter->force_reset = true;
1446 schedule_work(
1447 &adapter->force_close_task);
1448 }
1449 break;
1450 }
1451 mutex_unlock(&hw->hw_info.lock);
1452
1453 hw->ep_shm_info[epidx].ep_stats
1454 .com_unregist_buf_exec += 1;
1455
1456 spin_lock_irqsave(&hw->rx_status_lock, flags);
1457 fjes_hw_setup_epbuf(
1458 &hw->ep_shm_info[epidx].tx,
1459 netdev->dev_addr, netdev->mtu);
1460 spin_unlock_irqrestore(&hw->rx_status_lock,
1461 flags);
1462
1463 clear_bit(epidx, &hw->txrx_stop_req_bit);
1464 clear_bit(epidx, &unshare_watch_bitmask);
1465 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1466 }
1467
1468 if (test_bit(epidx, &unshare_watch_bitmask)) {
1469 spin_lock_irqsave(&hw->rx_status_lock, flags);
1470 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1471 ~FJES_RX_STOP_REQ_DONE;
1472 spin_unlock_irqrestore(&hw->rx_status_lock,
1473 flags);
1474 }
1475 }
1476 }
1477}
1478
1479/* fjes_init_module - Driver Registration Routine */
1480static int __init fjes_init_module(void)
1481{
1482 int result;
1483
1484 pr_info("%s - version %s - %s\n",
1485 fjes_driver_string, fjes_driver_version, fjes_copyright);
1486
1487 fjes_dbg_init();
1488
1489 result = platform_driver_register(&fjes_driver);
1490 if (result < 0) {
1491 fjes_dbg_exit();
1492 return result;
1493 }
1494
1495 result = acpi_bus_register_driver(&fjes_acpi_driver);
1496 if (result < 0)
1497 goto fail_acpi_driver;
1498
1499 return 0;
1500
1501fail_acpi_driver:
1502 platform_driver_unregister(&fjes_driver);
1503 fjes_dbg_exit();
1504 return result;
1505}
1506
1507module_init(fjes_init_module);
1508
1509/* fjes_exit_module - Driver Exit Cleanup Routine */
1510static void __exit fjes_exit_module(void)
1511{
1512 acpi_bus_unregister_driver(&fjes_acpi_driver);
1513 platform_driver_unregister(&fjes_driver);
1514 fjes_dbg_exit();
1515}
1516
1517module_exit(fjes_exit_module);