1 /*
2 * FUJITSU Extended Socket Network Device driver
3 * Copyright (c) 2015 FUJITSU LIMITED
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * The full GNU General Public License is included in this distribution in
18 * the file called "COPYING".
19 *
20 */
21
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/nls.h>
25 #include <linux/platform_device.h>
26 #include <linux/netdevice.h>
27 #include <linux/interrupt.h>
28
29 #include "fjes.h"
30 #include "fjes_trace.h"
31
32 #define MAJ 1
33 #define MIN 2
34 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
35 #define DRV_NAME "fjes"
36 char fjes_driver_name[] = DRV_NAME;
37 char fjes_driver_version[] = DRV_VERSION;
38 static const char fjes_driver_string[] =
39 "FUJITSU Extended Socket Network Device Driver";
40 static const char fjes_copyright[] =
41 "Copyright (c) 2015 FUJITSU LIMITED";
42
43 MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
44 MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(DRV_VERSION);
47
48 #define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02"
49
50 static int fjes_request_irq(struct fjes_adapter *);
51 static void fjes_free_irq(struct fjes_adapter *);
52
53 static int fjes_open(struct net_device *);
54 static int fjes_close(struct net_device *);
55 static int fjes_setup_resources(struct fjes_adapter *);
56 static void fjes_free_resources(struct fjes_adapter *);
57 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
58 static void fjes_raise_intr_rxdata_task(struct work_struct *);
59 static void fjes_tx_stall_task(struct work_struct *);
60 static void fjes_force_close_task(struct work_struct *);
61 static irqreturn_t fjes_intr(int, void*);
62 static void fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
63 static int fjes_change_mtu(struct net_device *, int);
64 static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
65 static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
66 static void fjes_tx_retry(struct net_device *);
67
68 static int fjes_acpi_add(struct acpi_device *);
69 static int fjes_acpi_remove(struct acpi_device *);
70 static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
71
72 static int fjes_probe(struct platform_device *);
73 static int fjes_remove(struct platform_device *);
74
75 static int fjes_sw_init(struct fjes_adapter *);
76 static void fjes_netdev_setup(struct net_device *);
77 static void fjes_irq_watch_task(struct work_struct *);
78 static void fjes_watch_unshare_task(struct work_struct *);
79 static void fjes_rx_irq(struct fjes_adapter *, int);
80 static int fjes_poll(struct napi_struct *, int);
81
82 static const struct acpi_device_id fjes_acpi_ids[] = {
83 {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
84 {"", 0},
85 };
86 MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
87
88 static struct acpi_driver fjes_acpi_driver = {
89 .name = DRV_NAME,
90 .class = DRV_NAME,
91 .owner = THIS_MODULE,
92 .ids = fjes_acpi_ids,
93 .ops = {
94 .add = fjes_acpi_add,
95 .remove = fjes_acpi_remove,
96 },
97 };
98
99 static struct platform_driver fjes_driver = {
100 .driver = {
101 .name = DRV_NAME,
102 },
103 .probe = fjes_probe,
104 .remove = fjes_remove,
105 };
106
107 static struct resource fjes_resource[] = {
108 {
109 .flags = IORESOURCE_MEM,
110 .start = 0,
111 .end = 0,
112 },
113 {
114 .flags = IORESOURCE_IRQ,
115 .start = 0,
116 .end = 0,
117 },
118 };
119
is_extended_socket_device(struct acpi_device * device)120 static bool is_extended_socket_device(struct acpi_device *device)
121 {
122 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
123 char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
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 false;
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 false;
141 }
142 kfree(buffer.pointer);
143
144 return true;
145 }
146
acpi_check_extended_socket_status(struct acpi_device * device)147 static int acpi_check_extended_socket_status(struct acpi_device *device)
148 {
149 unsigned long long sta;
150 acpi_status status;
151
152 status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
153 if (ACPI_FAILURE(status))
154 return -ENODEV;
155
156 if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
157 (sta & ACPI_STA_DEVICE_ENABLED) &&
158 (sta & ACPI_STA_DEVICE_UI) &&
159 (sta & ACPI_STA_DEVICE_FUNCTIONING)))
160 return -ENODEV;
161
162 return 0;
163 }
164
fjes_acpi_add(struct acpi_device * device)165 static int fjes_acpi_add(struct acpi_device *device)
166 {
167 struct platform_device *plat_dev;
168 acpi_status status;
169
170 if (!is_extended_socket_device(device))
171 return -ENODEV;
172
173 if (acpi_check_extended_socket_status(device))
174 return -ENODEV;
175
176 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
177 fjes_get_acpi_resource, fjes_resource);
178 if (ACPI_FAILURE(status))
179 return -ENODEV;
180
181 /* create platform_device */
182 plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
183 ARRAY_SIZE(fjes_resource));
184 if (IS_ERR(plat_dev))
185 return PTR_ERR(plat_dev);
186
187 device->driver_data = plat_dev;
188
189 return 0;
190 }
191
fjes_acpi_remove(struct acpi_device * device)192 static int fjes_acpi_remove(struct acpi_device *device)
193 {
194 struct platform_device *plat_dev;
195
196 plat_dev = (struct platform_device *)acpi_driver_data(device);
197 platform_device_unregister(plat_dev);
198
199 return 0;
200 }
201
202 static acpi_status
fjes_get_acpi_resource(struct acpi_resource * acpi_res,void * data)203 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
204 {
205 struct acpi_resource_address32 *addr;
206 struct acpi_resource_irq *irq;
207 struct resource *res = data;
208
209 switch (acpi_res->type) {
210 case ACPI_RESOURCE_TYPE_ADDRESS32:
211 addr = &acpi_res->data.address32;
212 res[0].start = addr->address.minimum;
213 res[0].end = addr->address.minimum +
214 addr->address.address_length - 1;
215 break;
216
217 case ACPI_RESOURCE_TYPE_IRQ:
218 irq = &acpi_res->data.irq;
219 if (irq->interrupt_count != 1)
220 return AE_ERROR;
221 res[1].start = irq->interrupts[0];
222 res[1].end = irq->interrupts[0];
223 break;
224
225 default:
226 break;
227 }
228
229 return AE_OK;
230 }
231
fjes_request_irq(struct fjes_adapter * adapter)232 static int fjes_request_irq(struct fjes_adapter *adapter)
233 {
234 struct net_device *netdev = adapter->netdev;
235 int result = -1;
236
237 adapter->interrupt_watch_enable = true;
238 if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
239 queue_delayed_work(adapter->control_wq,
240 &adapter->interrupt_watch_task,
241 FJES_IRQ_WATCH_DELAY);
242 }
243
244 if (!adapter->irq_registered) {
245 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
246 IRQF_SHARED, netdev->name, adapter);
247 if (result)
248 adapter->irq_registered = false;
249 else
250 adapter->irq_registered = true;
251 }
252
253 return result;
254 }
255
fjes_free_irq(struct fjes_adapter * adapter)256 static void fjes_free_irq(struct fjes_adapter *adapter)
257 {
258 struct fjes_hw *hw = &adapter->hw;
259
260 adapter->interrupt_watch_enable = false;
261 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
262
263 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
264
265 if (adapter->irq_registered) {
266 free_irq(adapter->hw.hw_res.irq, adapter);
267 adapter->irq_registered = false;
268 }
269 }
270
271 static const struct net_device_ops fjes_netdev_ops = {
272 .ndo_open = fjes_open,
273 .ndo_stop = fjes_close,
274 .ndo_start_xmit = fjes_xmit_frame,
275 .ndo_get_stats64 = fjes_get_stats64,
276 .ndo_change_mtu = fjes_change_mtu,
277 .ndo_tx_timeout = fjes_tx_retry,
278 .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid,
279 .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
280 };
281
282 /* fjes_open - Called when a network interface is made active */
fjes_open(struct net_device * netdev)283 static int fjes_open(struct net_device *netdev)
284 {
285 struct fjes_adapter *adapter = netdev_priv(netdev);
286 struct fjes_hw *hw = &adapter->hw;
287 int result;
288
289 if (adapter->open_guard)
290 return -ENXIO;
291
292 result = fjes_setup_resources(adapter);
293 if (result)
294 goto err_setup_res;
295
296 hw->txrx_stop_req_bit = 0;
297 hw->epstop_req_bit = 0;
298
299 napi_enable(&adapter->napi);
300
301 fjes_hw_capture_interrupt_status(hw);
302
303 result = fjes_request_irq(adapter);
304 if (result)
305 goto err_req_irq;
306
307 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
308
309 netif_tx_start_all_queues(netdev);
310 netif_carrier_on(netdev);
311
312 return 0;
313
314 err_req_irq:
315 fjes_free_irq(adapter);
316 napi_disable(&adapter->napi);
317
318 err_setup_res:
319 fjes_free_resources(adapter);
320 return result;
321 }
322
323 /* fjes_close - Disables a network interface */
fjes_close(struct net_device * netdev)324 static int fjes_close(struct net_device *netdev)
325 {
326 struct fjes_adapter *adapter = netdev_priv(netdev);
327 struct fjes_hw *hw = &adapter->hw;
328 unsigned long flags;
329 int epidx;
330
331 netif_tx_stop_all_queues(netdev);
332 netif_carrier_off(netdev);
333
334 fjes_hw_raise_epstop(hw);
335
336 napi_disable(&adapter->napi);
337
338 spin_lock_irqsave(&hw->rx_status_lock, flags);
339 for (epidx = 0; epidx < hw->max_epid; epidx++) {
340 if (epidx == hw->my_epid)
341 continue;
342
343 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
344 EP_PARTNER_SHARED)
345 adapter->hw.ep_shm_info[epidx]
346 .tx.info->v1i.rx_status &=
347 ~FJES_RX_POLL_WORK;
348 }
349 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
350
351 fjes_free_irq(adapter);
352
353 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
354 cancel_work_sync(&adapter->unshare_watch_task);
355 adapter->unshare_watch_bitmask = 0;
356 cancel_work_sync(&adapter->raise_intr_rxdata_task);
357 cancel_work_sync(&adapter->tx_stall_task);
358
359 cancel_work_sync(&hw->update_zone_task);
360 cancel_work_sync(&hw->epstop_task);
361
362 fjes_hw_wait_epstop(hw);
363
364 fjes_free_resources(adapter);
365
366 return 0;
367 }
368
fjes_setup_resources(struct fjes_adapter * adapter)369 static int fjes_setup_resources(struct fjes_adapter *adapter)
370 {
371 struct net_device *netdev = adapter->netdev;
372 struct ep_share_mem_info *buf_pair;
373 struct fjes_hw *hw = &adapter->hw;
374 unsigned long flags;
375 int result;
376 int epidx;
377
378 mutex_lock(&hw->hw_info.lock);
379 result = fjes_hw_request_info(hw);
380 switch (result) {
381 case 0:
382 for (epidx = 0; epidx < hw->max_epid; epidx++) {
383 hw->ep_shm_info[epidx].es_status =
384 hw->hw_info.res_buf->info.info[epidx].es_status;
385 hw->ep_shm_info[epidx].zone =
386 hw->hw_info.res_buf->info.info[epidx].zone;
387 }
388 break;
389 default:
390 case -ENOMSG:
391 case -EBUSY:
392 adapter->force_reset = true;
393
394 mutex_unlock(&hw->hw_info.lock);
395 return result;
396 }
397 mutex_unlock(&hw->hw_info.lock);
398
399 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
400 if ((epidx != hw->my_epid) &&
401 (hw->ep_shm_info[epidx].es_status ==
402 FJES_ZONING_STATUS_ENABLE)) {
403 fjes_hw_raise_interrupt(hw, epidx,
404 REG_ICTL_MASK_INFO_UPDATE);
405 hw->ep_shm_info[epidx].ep_stats
406 .send_intr_zoneupdate += 1;
407 }
408 }
409
410 msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
411
412 for (epidx = 0; epidx < (hw->max_epid); epidx++) {
413 if (epidx == hw->my_epid)
414 continue;
415
416 buf_pair = &hw->ep_shm_info[epidx];
417
418 spin_lock_irqsave(&hw->rx_status_lock, flags);
419 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
420 netdev->mtu);
421 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
422
423 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
424 mutex_lock(&hw->hw_info.lock);
425 result =
426 fjes_hw_register_buff_addr(hw, epidx, buf_pair);
427 mutex_unlock(&hw->hw_info.lock);
428
429 switch (result) {
430 case 0:
431 break;
432 case -ENOMSG:
433 case -EBUSY:
434 default:
435 adapter->force_reset = true;
436 return result;
437 }
438
439 hw->ep_shm_info[epidx].ep_stats
440 .com_regist_buf_exec += 1;
441 }
442 }
443
444 return 0;
445 }
446
fjes_free_resources(struct fjes_adapter * adapter)447 static void fjes_free_resources(struct fjes_adapter *adapter)
448 {
449 struct net_device *netdev = adapter->netdev;
450 struct fjes_device_command_param param;
451 struct ep_share_mem_info *buf_pair;
452 struct fjes_hw *hw = &adapter->hw;
453 bool reset_flag = false;
454 unsigned long flags;
455 int result;
456 int epidx;
457
458 for (epidx = 0; epidx < hw->max_epid; epidx++) {
459 if (epidx == hw->my_epid)
460 continue;
461
462 mutex_lock(&hw->hw_info.lock);
463 result = fjes_hw_unregister_buff_addr(hw, epidx);
464 mutex_unlock(&hw->hw_info.lock);
465
466 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
467
468 if (result)
469 reset_flag = true;
470
471 buf_pair = &hw->ep_shm_info[epidx];
472
473 spin_lock_irqsave(&hw->rx_status_lock, flags);
474 fjes_hw_setup_epbuf(&buf_pair->tx,
475 netdev->dev_addr, netdev->mtu);
476 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
477
478 clear_bit(epidx, &hw->txrx_stop_req_bit);
479 }
480
481 if (reset_flag || adapter->force_reset) {
482 result = fjes_hw_reset(hw);
483
484 adapter->force_reset = false;
485
486 if (result)
487 adapter->open_guard = true;
488
489 hw->hw_info.buffer_share_bit = 0;
490
491 memset((void *)¶m, 0, sizeof(param));
492
493 param.req_len = hw->hw_info.req_buf_size;
494 param.req_start = __pa(hw->hw_info.req_buf);
495 param.res_len = hw->hw_info.res_buf_size;
496 param.res_start = __pa(hw->hw_info.res_buf);
497 param.share_start = __pa(hw->hw_info.share->ep_status);
498
499 fjes_hw_init_command_registers(hw, ¶m);
500 }
501 }
502
fjes_tx_stall_task(struct work_struct * work)503 static void fjes_tx_stall_task(struct work_struct *work)
504 {
505 struct fjes_adapter *adapter = container_of(work,
506 struct fjes_adapter, tx_stall_task);
507 struct net_device *netdev = adapter->netdev;
508 struct fjes_hw *hw = &adapter->hw;
509 int all_queue_available, sendable;
510 enum ep_partner_status pstatus;
511 int max_epid, my_epid, epid;
512 union ep_buffer_info *info;
513 int i;
514
515 if (((long)jiffies -
516 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
517 netif_wake_queue(netdev);
518 return;
519 }
520
521 my_epid = hw->my_epid;
522 max_epid = hw->max_epid;
523
524 for (i = 0; i < 5; i++) {
525 all_queue_available = 1;
526
527 for (epid = 0; epid < max_epid; epid++) {
528 if (my_epid == epid)
529 continue;
530
531 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
532 sendable = (pstatus == EP_PARTNER_SHARED);
533 if (!sendable)
534 continue;
535
536 info = adapter->hw.ep_shm_info[epid].tx.info;
537
538 if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
539 return;
540
541 if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
542 info->v1i.count_max)) {
543 all_queue_available = 0;
544 break;
545 }
546 }
547
548 if (all_queue_available) {
549 netif_wake_queue(netdev);
550 return;
551 }
552 }
553
554 usleep_range(50, 100);
555
556 queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
557 }
558
fjes_force_close_task(struct work_struct * work)559 static void fjes_force_close_task(struct work_struct *work)
560 {
561 struct fjes_adapter *adapter = container_of(work,
562 struct fjes_adapter, force_close_task);
563 struct net_device *netdev = adapter->netdev;
564
565 rtnl_lock();
566 dev_close(netdev);
567 rtnl_unlock();
568 }
569
fjes_raise_intr_rxdata_task(struct work_struct * work)570 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
571 {
572 struct fjes_adapter *adapter = container_of(work,
573 struct fjes_adapter, raise_intr_rxdata_task);
574 struct fjes_hw *hw = &adapter->hw;
575 enum ep_partner_status pstatus;
576 int max_epid, my_epid, epid;
577
578 my_epid = hw->my_epid;
579 max_epid = hw->max_epid;
580
581 for (epid = 0; epid < max_epid; epid++)
582 hw->ep_shm_info[epid].tx_status_work = 0;
583
584 for (epid = 0; epid < max_epid; epid++) {
585 if (epid == my_epid)
586 continue;
587
588 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
589 if (pstatus == EP_PARTNER_SHARED) {
590 hw->ep_shm_info[epid].tx_status_work =
591 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
592
593 if (hw->ep_shm_info[epid].tx_status_work ==
594 FJES_TX_DELAY_SEND_PENDING) {
595 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
596 FJES_TX_DELAY_SEND_NONE;
597 }
598 }
599 }
600
601 for (epid = 0; epid < max_epid; epid++) {
602 if (epid == my_epid)
603 continue;
604
605 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
606 if ((hw->ep_shm_info[epid].tx_status_work ==
607 FJES_TX_DELAY_SEND_PENDING) &&
608 (pstatus == EP_PARTNER_SHARED) &&
609 !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
610 FJES_RX_POLL_WORK)) {
611 fjes_hw_raise_interrupt(hw, epid,
612 REG_ICTL_MASK_RX_DATA);
613 hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
614 }
615 }
616
617 usleep_range(500, 1000);
618 }
619
fjes_tx_send(struct fjes_adapter * adapter,int dest,void * data,size_t len)620 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
621 void *data, size_t len)
622 {
623 int retval;
624
625 retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
626 data, len);
627 if (retval)
628 return retval;
629
630 adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
631 FJES_TX_DELAY_SEND_PENDING;
632 if (!work_pending(&adapter->raise_intr_rxdata_task))
633 queue_work(adapter->txrx_wq,
634 &adapter->raise_intr_rxdata_task);
635
636 retval = 0;
637 return retval;
638 }
639
640 static netdev_tx_t
fjes_xmit_frame(struct sk_buff * skb,struct net_device * netdev)641 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
642 {
643 struct fjes_adapter *adapter = netdev_priv(netdev);
644 struct fjes_hw *hw = &adapter->hw;
645
646 int max_epid, my_epid, dest_epid;
647 enum ep_partner_status pstatus;
648 struct netdev_queue *cur_queue;
649 char shortpkt[VLAN_ETH_HLEN];
650 bool is_multi, vlan;
651 struct ethhdr *eth;
652 u16 queue_no = 0;
653 u16 vlan_id = 0;
654 netdev_tx_t ret;
655 char *data;
656 int len;
657
658 ret = NETDEV_TX_OK;
659 is_multi = false;
660 cur_queue = netdev_get_tx_queue(netdev, queue_no);
661
662 eth = (struct ethhdr *)skb->data;
663 my_epid = hw->my_epid;
664
665 vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
666
667 data = skb->data;
668 len = skb->len;
669
670 if (is_multicast_ether_addr(eth->h_dest)) {
671 dest_epid = 0;
672 max_epid = hw->max_epid;
673 is_multi = true;
674 } else if (is_local_ether_addr(eth->h_dest)) {
675 dest_epid = eth->h_dest[ETH_ALEN - 1];
676 max_epid = dest_epid + 1;
677
678 if ((eth->h_dest[0] == 0x02) &&
679 (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
680 eth->h_dest[3] | eth->h_dest[4])) &&
681 (dest_epid < hw->max_epid)) {
682 ;
683 } else {
684 dest_epid = 0;
685 max_epid = 0;
686 ret = NETDEV_TX_OK;
687
688 adapter->stats64.tx_packets += 1;
689 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
690 adapter->stats64.tx_bytes += len;
691 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
692 }
693 } else {
694 dest_epid = 0;
695 max_epid = 0;
696 ret = NETDEV_TX_OK;
697
698 adapter->stats64.tx_packets += 1;
699 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
700 adapter->stats64.tx_bytes += len;
701 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
702 }
703
704 for (; dest_epid < max_epid; dest_epid++) {
705 if (my_epid == dest_epid)
706 continue;
707
708 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
709 if (pstatus != EP_PARTNER_SHARED) {
710 if (!is_multi)
711 hw->ep_shm_info[dest_epid].ep_stats
712 .tx_dropped_not_shared += 1;
713 ret = NETDEV_TX_OK;
714 } else if (!fjes_hw_check_epbuf_version(
715 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
716 /* version is NOT 0 */
717 adapter->stats64.tx_carrier_errors += 1;
718 hw->ep_shm_info[dest_epid].net_stats
719 .tx_carrier_errors += 1;
720 hw->ep_shm_info[dest_epid].ep_stats
721 .tx_dropped_ver_mismatch += 1;
722
723 ret = NETDEV_TX_OK;
724 } else if (!fjes_hw_check_mtu(
725 &adapter->hw.ep_shm_info[dest_epid].rx,
726 netdev->mtu)) {
727 adapter->stats64.tx_dropped += 1;
728 hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
729 adapter->stats64.tx_errors += 1;
730 hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
731 hw->ep_shm_info[dest_epid].ep_stats
732 .tx_dropped_buf_size_mismatch += 1;
733
734 ret = NETDEV_TX_OK;
735 } else if (vlan &&
736 !fjes_hw_check_vlan_id(
737 &adapter->hw.ep_shm_info[dest_epid].rx,
738 vlan_id)) {
739 hw->ep_shm_info[dest_epid].ep_stats
740 .tx_dropped_vlanid_mismatch += 1;
741 ret = NETDEV_TX_OK;
742 } else {
743 if (len < VLAN_ETH_HLEN) {
744 memset(shortpkt, 0, VLAN_ETH_HLEN);
745 memcpy(shortpkt, skb->data, skb->len);
746 len = VLAN_ETH_HLEN;
747 data = shortpkt;
748 }
749
750 if (adapter->tx_retry_count == 0) {
751 adapter->tx_start_jiffies = jiffies;
752 adapter->tx_retry_count = 1;
753 } else {
754 adapter->tx_retry_count++;
755 }
756
757 if (fjes_tx_send(adapter, dest_epid, data, len)) {
758 if (is_multi) {
759 ret = NETDEV_TX_OK;
760 } else if (
761 ((long)jiffies -
762 (long)adapter->tx_start_jiffies) >=
763 FJES_TX_RETRY_TIMEOUT) {
764 adapter->stats64.tx_fifo_errors += 1;
765 hw->ep_shm_info[dest_epid].net_stats
766 .tx_fifo_errors += 1;
767 adapter->stats64.tx_errors += 1;
768 hw->ep_shm_info[dest_epid].net_stats
769 .tx_errors += 1;
770
771 ret = NETDEV_TX_OK;
772 } else {
773 netif_trans_update(netdev);
774 hw->ep_shm_info[dest_epid].ep_stats
775 .tx_buffer_full += 1;
776 netif_tx_stop_queue(cur_queue);
777
778 if (!work_pending(&adapter->tx_stall_task))
779 queue_work(adapter->txrx_wq,
780 &adapter->tx_stall_task);
781
782 ret = NETDEV_TX_BUSY;
783 }
784 } else {
785 if (!is_multi) {
786 adapter->stats64.tx_packets += 1;
787 hw->ep_shm_info[dest_epid].net_stats
788 .tx_packets += 1;
789 adapter->stats64.tx_bytes += len;
790 hw->ep_shm_info[dest_epid].net_stats
791 .tx_bytes += len;
792 }
793
794 adapter->tx_retry_count = 0;
795 ret = NETDEV_TX_OK;
796 }
797 }
798 }
799
800 if (ret == NETDEV_TX_OK) {
801 dev_kfree_skb(skb);
802 if (is_multi) {
803 adapter->stats64.tx_packets += 1;
804 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
805 adapter->stats64.tx_bytes += 1;
806 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
807 }
808 }
809
810 return ret;
811 }
812
fjes_tx_retry(struct net_device * netdev)813 static void fjes_tx_retry(struct net_device *netdev)
814 {
815 struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
816
817 netif_tx_wake_queue(queue);
818 }
819
820 static void
fjes_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * stats)821 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
822 {
823 struct fjes_adapter *adapter = netdev_priv(netdev);
824
825 memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
826 }
827
fjes_change_mtu(struct net_device * netdev,int new_mtu)828 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
829 {
830 struct fjes_adapter *adapter = netdev_priv(netdev);
831 bool running = netif_running(netdev);
832 struct fjes_hw *hw = &adapter->hw;
833 unsigned long flags;
834 int ret = -EINVAL;
835 int idx, epidx;
836
837 for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
838 if (new_mtu <= fjes_support_mtu[idx]) {
839 new_mtu = fjes_support_mtu[idx];
840 if (new_mtu == netdev->mtu)
841 return 0;
842
843 ret = 0;
844 break;
845 }
846 }
847
848 if (ret)
849 return ret;
850
851 if (running) {
852 spin_lock_irqsave(&hw->rx_status_lock, flags);
853 for (epidx = 0; epidx < hw->max_epid; epidx++) {
854 if (epidx == hw->my_epid)
855 continue;
856 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
857 ~FJES_RX_MTU_CHANGING_DONE;
858 }
859 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
860
861 netif_tx_stop_all_queues(netdev);
862 netif_carrier_off(netdev);
863 cancel_work_sync(&adapter->tx_stall_task);
864 napi_disable(&adapter->napi);
865
866 msleep(1000);
867
868 netif_tx_stop_all_queues(netdev);
869 }
870
871 netdev->mtu = new_mtu;
872
873 if (running) {
874 for (epidx = 0; epidx < hw->max_epid; epidx++) {
875 if (epidx == hw->my_epid)
876 continue;
877
878 spin_lock_irqsave(&hw->rx_status_lock, flags);
879 fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
880 netdev->dev_addr,
881 netdev->mtu);
882
883 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
884 FJES_RX_MTU_CHANGING_DONE;
885 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
886 }
887
888 netif_tx_wake_all_queues(netdev);
889 netif_carrier_on(netdev);
890 napi_enable(&adapter->napi);
891 napi_schedule(&adapter->napi);
892 }
893
894 return ret;
895 }
896
fjes_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)897 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
898 __be16 proto, u16 vid)
899 {
900 struct fjes_adapter *adapter = netdev_priv(netdev);
901 bool ret = true;
902 int epid;
903
904 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
905 if (epid == adapter->hw.my_epid)
906 continue;
907
908 if (!fjes_hw_check_vlan_id(
909 &adapter->hw.ep_shm_info[epid].tx, vid))
910 ret = fjes_hw_set_vlan_id(
911 &adapter->hw.ep_shm_info[epid].tx, vid);
912 }
913
914 return ret ? 0 : -ENOSPC;
915 }
916
fjes_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)917 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
918 __be16 proto, u16 vid)
919 {
920 struct fjes_adapter *adapter = netdev_priv(netdev);
921 int epid;
922
923 for (epid = 0; epid < adapter->hw.max_epid; epid++) {
924 if (epid == adapter->hw.my_epid)
925 continue;
926
927 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
928 }
929
930 return 0;
931 }
932
fjes_txrx_stop_req_irq(struct fjes_adapter * adapter,int src_epid)933 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
934 int src_epid)
935 {
936 struct fjes_hw *hw = &adapter->hw;
937 enum ep_partner_status status;
938 unsigned long flags;
939
940 status = fjes_hw_get_partner_ep_status(hw, src_epid);
941 trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
942 switch (status) {
943 case EP_PARTNER_UNSHARE:
944 case EP_PARTNER_COMPLETE:
945 default:
946 break;
947 case EP_PARTNER_WAITING:
948 if (src_epid < hw->my_epid) {
949 spin_lock_irqsave(&hw->rx_status_lock, flags);
950 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
951 FJES_RX_STOP_REQ_DONE;
952 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
953
954 clear_bit(src_epid, &hw->txrx_stop_req_bit);
955 set_bit(src_epid, &adapter->unshare_watch_bitmask);
956
957 if (!work_pending(&adapter->unshare_watch_task))
958 queue_work(adapter->control_wq,
959 &adapter->unshare_watch_task);
960 }
961 break;
962 case EP_PARTNER_SHARED:
963 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
964 FJES_RX_STOP_REQ_REQUEST) {
965 set_bit(src_epid, &hw->epstop_req_bit);
966 if (!work_pending(&hw->epstop_task))
967 queue_work(adapter->control_wq,
968 &hw->epstop_task);
969 }
970 break;
971 }
972 trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
973 }
974
fjes_stop_req_irq(struct fjes_adapter * adapter,int src_epid)975 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
976 {
977 struct fjes_hw *hw = &adapter->hw;
978 enum ep_partner_status status;
979 unsigned long flags;
980
981 set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
982
983 status = fjes_hw_get_partner_ep_status(hw, src_epid);
984 trace_fjes_stop_req_irq_pre(hw, src_epid, status);
985 switch (status) {
986 case EP_PARTNER_WAITING:
987 spin_lock_irqsave(&hw->rx_status_lock, flags);
988 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
989 FJES_RX_STOP_REQ_DONE;
990 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
991 clear_bit(src_epid, &hw->txrx_stop_req_bit);
992 /* fall through */
993 case EP_PARTNER_UNSHARE:
994 case EP_PARTNER_COMPLETE:
995 default:
996 set_bit(src_epid, &adapter->unshare_watch_bitmask);
997 if (!work_pending(&adapter->unshare_watch_task))
998 queue_work(adapter->control_wq,
999 &adapter->unshare_watch_task);
1000 break;
1001 case EP_PARTNER_SHARED:
1002 set_bit(src_epid, &hw->epstop_req_bit);
1003
1004 if (!work_pending(&hw->epstop_task))
1005 queue_work(adapter->control_wq, &hw->epstop_task);
1006 break;
1007 }
1008 trace_fjes_stop_req_irq_post(hw, src_epid);
1009 }
1010
fjes_update_zone_irq(struct fjes_adapter * adapter,int src_epid)1011 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
1012 int src_epid)
1013 {
1014 struct fjes_hw *hw = &adapter->hw;
1015
1016 if (!work_pending(&hw->update_zone_task))
1017 queue_work(adapter->control_wq, &hw->update_zone_task);
1018 }
1019
fjes_intr(int irq,void * data)1020 static irqreturn_t fjes_intr(int irq, void *data)
1021 {
1022 struct fjes_adapter *adapter = data;
1023 struct fjes_hw *hw = &adapter->hw;
1024 irqreturn_t ret;
1025 u32 icr;
1026
1027 icr = fjes_hw_capture_interrupt_status(hw);
1028
1029 if (icr & REG_IS_MASK_IS_ASSERT) {
1030 if (icr & REG_ICTL_MASK_RX_DATA) {
1031 fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
1032 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1033 .recv_intr_rx += 1;
1034 }
1035
1036 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
1037 fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1038 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1039 .recv_intr_stop += 1;
1040 }
1041
1042 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
1043 fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
1044 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1045 .recv_intr_unshare += 1;
1046 }
1047
1048 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
1049 fjes_hw_set_irqmask(hw,
1050 REG_ICTL_MASK_TXRX_STOP_DONE, true);
1051
1052 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
1053 fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
1054 hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
1055 .recv_intr_zoneupdate += 1;
1056 }
1057
1058 ret = IRQ_HANDLED;
1059 } else {
1060 ret = IRQ_NONE;
1061 }
1062
1063 return ret;
1064 }
1065
fjes_rxframe_search_exist(struct fjes_adapter * adapter,int start_epid)1066 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
1067 int start_epid)
1068 {
1069 struct fjes_hw *hw = &adapter->hw;
1070 enum ep_partner_status pstatus;
1071 int max_epid, cur_epid;
1072 int i;
1073
1074 max_epid = hw->max_epid;
1075 start_epid = (start_epid + 1 + max_epid) % max_epid;
1076
1077 for (i = 0; i < max_epid; i++) {
1078 cur_epid = (start_epid + i) % max_epid;
1079 if (cur_epid == hw->my_epid)
1080 continue;
1081
1082 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
1083 if (pstatus == EP_PARTNER_SHARED) {
1084 if (!fjes_hw_epbuf_rx_is_empty(
1085 &hw->ep_shm_info[cur_epid].rx))
1086 return cur_epid;
1087 }
1088 }
1089 return -1;
1090 }
1091
fjes_rxframe_get(struct fjes_adapter * adapter,size_t * psize,int * cur_epid)1092 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
1093 int *cur_epid)
1094 {
1095 void *frame;
1096
1097 *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
1098 if (*cur_epid < 0)
1099 return NULL;
1100
1101 frame =
1102 fjes_hw_epbuf_rx_curpkt_get_addr(
1103 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
1104
1105 return frame;
1106 }
1107
fjes_rxframe_release(struct fjes_adapter * adapter,int cur_epid)1108 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
1109 {
1110 fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
1111 }
1112
fjes_rx_irq(struct fjes_adapter * adapter,int src_epid)1113 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
1114 {
1115 struct fjes_hw *hw = &adapter->hw;
1116
1117 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
1118
1119 adapter->unset_rx_last = true;
1120 napi_schedule(&adapter->napi);
1121 }
1122
fjes_poll(struct napi_struct * napi,int budget)1123 static int fjes_poll(struct napi_struct *napi, int budget)
1124 {
1125 struct fjes_adapter *adapter =
1126 container_of(napi, struct fjes_adapter, napi);
1127 struct net_device *netdev = napi->dev;
1128 struct fjes_hw *hw = &adapter->hw;
1129 struct sk_buff *skb;
1130 int work_done = 0;
1131 int cur_epid = 0;
1132 int epidx;
1133 size_t frame_len;
1134 void *frame;
1135
1136 spin_lock(&hw->rx_status_lock);
1137 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1138 if (epidx == hw->my_epid)
1139 continue;
1140
1141 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1142 EP_PARTNER_SHARED)
1143 adapter->hw.ep_shm_info[epidx]
1144 .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
1145 }
1146 spin_unlock(&hw->rx_status_lock);
1147
1148 while (work_done < budget) {
1149 prefetch(&adapter->hw);
1150 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
1151
1152 if (frame) {
1153 skb = napi_alloc_skb(napi, frame_len);
1154 if (!skb) {
1155 adapter->stats64.rx_dropped += 1;
1156 hw->ep_shm_info[cur_epid].net_stats
1157 .rx_dropped += 1;
1158 adapter->stats64.rx_errors += 1;
1159 hw->ep_shm_info[cur_epid].net_stats
1160 .rx_errors += 1;
1161 } else {
1162 skb_put_data(skb, frame, frame_len);
1163 skb->protocol = eth_type_trans(skb, netdev);
1164 skb->ip_summed = CHECKSUM_UNNECESSARY;
1165
1166 netif_receive_skb(skb);
1167
1168 work_done++;
1169
1170 adapter->stats64.rx_packets += 1;
1171 hw->ep_shm_info[cur_epid].net_stats
1172 .rx_packets += 1;
1173 adapter->stats64.rx_bytes += frame_len;
1174 hw->ep_shm_info[cur_epid].net_stats
1175 .rx_bytes += frame_len;
1176
1177 if (is_multicast_ether_addr(
1178 ((struct ethhdr *)frame)->h_dest)) {
1179 adapter->stats64.multicast += 1;
1180 hw->ep_shm_info[cur_epid].net_stats
1181 .multicast += 1;
1182 }
1183 }
1184
1185 fjes_rxframe_release(adapter, cur_epid);
1186 adapter->unset_rx_last = true;
1187 } else {
1188 break;
1189 }
1190 }
1191
1192 if (work_done < budget) {
1193 napi_complete_done(napi, work_done);
1194
1195 if (adapter->unset_rx_last) {
1196 adapter->rx_last_jiffies = jiffies;
1197 adapter->unset_rx_last = false;
1198 }
1199
1200 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1201 napi_reschedule(napi);
1202 } else {
1203 spin_lock(&hw->rx_status_lock);
1204 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1205 if (epidx == hw->my_epid)
1206 continue;
1207 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1208 EP_PARTNER_SHARED)
1209 adapter->hw.ep_shm_info[epidx].tx
1210 .info->v1i.rx_status &=
1211 ~FJES_RX_POLL_WORK;
1212 }
1213 spin_unlock(&hw->rx_status_lock);
1214
1215 fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1216 }
1217 }
1218
1219 return work_done;
1220 }
1221
1222 /* fjes_probe - Device Initialization Routine */
fjes_probe(struct platform_device * plat_dev)1223 static int fjes_probe(struct platform_device *plat_dev)
1224 {
1225 struct fjes_adapter *adapter;
1226 struct net_device *netdev;
1227 struct resource *res;
1228 struct fjes_hw *hw;
1229 int err;
1230
1231 err = -ENOMEM;
1232 netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1233 NET_NAME_UNKNOWN, fjes_netdev_setup,
1234 FJES_MAX_QUEUES);
1235
1236 if (!netdev)
1237 goto err_out;
1238
1239 SET_NETDEV_DEV(netdev, &plat_dev->dev);
1240
1241 dev_set_drvdata(&plat_dev->dev, netdev);
1242 adapter = netdev_priv(netdev);
1243 adapter->netdev = netdev;
1244 adapter->plat_dev = plat_dev;
1245 hw = &adapter->hw;
1246 hw->back = adapter;
1247
1248 /* setup the private structure */
1249 err = fjes_sw_init(adapter);
1250 if (err)
1251 goto err_free_netdev;
1252
1253 INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1254 adapter->force_reset = false;
1255 adapter->open_guard = false;
1256
1257 adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1258 if (unlikely(!adapter->txrx_wq)) {
1259 err = -ENOMEM;
1260 goto err_free_netdev;
1261 }
1262
1263 adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1264 WQ_MEM_RECLAIM, 0);
1265 if (unlikely(!adapter->control_wq)) {
1266 err = -ENOMEM;
1267 goto err_free_txrx_wq;
1268 }
1269
1270 INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1271 INIT_WORK(&adapter->raise_intr_rxdata_task,
1272 fjes_raise_intr_rxdata_task);
1273 INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1274 adapter->unshare_watch_bitmask = 0;
1275
1276 INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1277 adapter->interrupt_watch_enable = false;
1278
1279 res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1280 hw->hw_res.start = res->start;
1281 hw->hw_res.size = resource_size(res);
1282 hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1283 err = fjes_hw_init(&adapter->hw);
1284 if (err)
1285 goto err_free_control_wq;
1286
1287 /* setup MAC address (02:00:00:00:00:[epid])*/
1288 netdev->dev_addr[0] = 2;
1289 netdev->dev_addr[1] = 0;
1290 netdev->dev_addr[2] = 0;
1291 netdev->dev_addr[3] = 0;
1292 netdev->dev_addr[4] = 0;
1293 netdev->dev_addr[5] = hw->my_epid; /* EPID */
1294
1295 err = register_netdev(netdev);
1296 if (err)
1297 goto err_hw_exit;
1298
1299 netif_carrier_off(netdev);
1300
1301 fjes_dbg_adapter_init(adapter);
1302
1303 return 0;
1304
1305 err_hw_exit:
1306 fjes_hw_exit(&adapter->hw);
1307 err_free_control_wq:
1308 destroy_workqueue(adapter->control_wq);
1309 err_free_txrx_wq:
1310 destroy_workqueue(adapter->txrx_wq);
1311 err_free_netdev:
1312 free_netdev(netdev);
1313 err_out:
1314 return err;
1315 }
1316
1317 /* fjes_remove - Device Removal Routine */
fjes_remove(struct platform_device * plat_dev)1318 static int fjes_remove(struct platform_device *plat_dev)
1319 {
1320 struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1321 struct fjes_adapter *adapter = netdev_priv(netdev);
1322 struct fjes_hw *hw = &adapter->hw;
1323
1324 fjes_dbg_adapter_exit(adapter);
1325
1326 cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1327 cancel_work_sync(&adapter->unshare_watch_task);
1328 cancel_work_sync(&adapter->raise_intr_rxdata_task);
1329 cancel_work_sync(&adapter->tx_stall_task);
1330 if (adapter->control_wq)
1331 destroy_workqueue(adapter->control_wq);
1332 if (adapter->txrx_wq)
1333 destroy_workqueue(adapter->txrx_wq);
1334
1335 unregister_netdev(netdev);
1336
1337 fjes_hw_exit(hw);
1338
1339 netif_napi_del(&adapter->napi);
1340
1341 free_netdev(netdev);
1342
1343 return 0;
1344 }
1345
fjes_sw_init(struct fjes_adapter * adapter)1346 static int fjes_sw_init(struct fjes_adapter *adapter)
1347 {
1348 struct net_device *netdev = adapter->netdev;
1349
1350 netif_napi_add(netdev, &adapter->napi, fjes_poll, 64);
1351
1352 return 0;
1353 }
1354
1355 /* fjes_netdev_setup - netdevice initialization routine */
fjes_netdev_setup(struct net_device * netdev)1356 static void fjes_netdev_setup(struct net_device *netdev)
1357 {
1358 ether_setup(netdev);
1359
1360 netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
1361 netdev->netdev_ops = &fjes_netdev_ops;
1362 fjes_set_ethtool_ops(netdev);
1363 netdev->mtu = fjes_support_mtu[3];
1364 netdev->min_mtu = fjes_support_mtu[0];
1365 netdev->max_mtu = fjes_support_mtu[3];
1366 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1367 }
1368
fjes_irq_watch_task(struct work_struct * work)1369 static void fjes_irq_watch_task(struct work_struct *work)
1370 {
1371 struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1372 struct fjes_adapter, interrupt_watch_task);
1373
1374 local_irq_disable();
1375 fjes_intr(adapter->hw.hw_res.irq, adapter);
1376 local_irq_enable();
1377
1378 if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1379 napi_schedule(&adapter->napi);
1380
1381 if (adapter->interrupt_watch_enable) {
1382 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1383 queue_delayed_work(adapter->control_wq,
1384 &adapter->interrupt_watch_task,
1385 FJES_IRQ_WATCH_DELAY);
1386 }
1387 }
1388
fjes_watch_unshare_task(struct work_struct * work)1389 static void fjes_watch_unshare_task(struct work_struct *work)
1390 {
1391 struct fjes_adapter *adapter =
1392 container_of(work, struct fjes_adapter, unshare_watch_task);
1393
1394 struct net_device *netdev = adapter->netdev;
1395 struct fjes_hw *hw = &adapter->hw;
1396
1397 int unshare_watch, unshare_reserve;
1398 int max_epid, my_epid, epidx;
1399 int stop_req, stop_req_done;
1400 ulong unshare_watch_bitmask;
1401 unsigned long flags;
1402 int wait_time = 0;
1403 int is_shared;
1404 int ret;
1405
1406 my_epid = hw->my_epid;
1407 max_epid = hw->max_epid;
1408
1409 unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1410 adapter->unshare_watch_bitmask = 0;
1411
1412 while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1413 (wait_time < 3000)) {
1414 for (epidx = 0; epidx < max_epid; epidx++) {
1415 if (epidx == my_epid)
1416 continue;
1417
1418 is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1419 epidx);
1420
1421 stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1422
1423 stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1424 FJES_RX_STOP_REQ_DONE;
1425
1426 unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1427
1428 unshare_reserve = test_bit(epidx,
1429 &hw->hw_info.buffer_unshare_reserve_bit);
1430
1431 if ((!stop_req ||
1432 (is_shared && (!is_shared || !stop_req_done))) &&
1433 (is_shared || !unshare_watch || !unshare_reserve))
1434 continue;
1435
1436 mutex_lock(&hw->hw_info.lock);
1437 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1438 switch (ret) {
1439 case 0:
1440 break;
1441 case -ENOMSG:
1442 case -EBUSY:
1443 default:
1444 if (!work_pending(
1445 &adapter->force_close_task)) {
1446 adapter->force_reset = true;
1447 schedule_work(
1448 &adapter->force_close_task);
1449 }
1450 break;
1451 }
1452 mutex_unlock(&hw->hw_info.lock);
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(&hw->ep_shm_info[epidx].tx,
1458 netdev->dev_addr, netdev->mtu);
1459 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1460
1461 clear_bit(epidx, &hw->txrx_stop_req_bit);
1462 clear_bit(epidx, &unshare_watch_bitmask);
1463 clear_bit(epidx,
1464 &hw->hw_info.buffer_unshare_reserve_bit);
1465 }
1466
1467 msleep(100);
1468 wait_time += 100;
1469 }
1470
1471 if (hw->hw_info.buffer_unshare_reserve_bit) {
1472 for (epidx = 0; epidx < max_epid; epidx++) {
1473 if (epidx == my_epid)
1474 continue;
1475
1476 if (test_bit(epidx,
1477 &hw->hw_info.buffer_unshare_reserve_bit)) {
1478 mutex_lock(&hw->hw_info.lock);
1479
1480 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1481 switch (ret) {
1482 case 0:
1483 break;
1484 case -ENOMSG:
1485 case -EBUSY:
1486 default:
1487 if (!work_pending(
1488 &adapter->force_close_task)) {
1489 adapter->force_reset = true;
1490 schedule_work(
1491 &adapter->force_close_task);
1492 }
1493 break;
1494 }
1495 mutex_unlock(&hw->hw_info.lock);
1496
1497 hw->ep_shm_info[epidx].ep_stats
1498 .com_unregist_buf_exec += 1;
1499
1500 spin_lock_irqsave(&hw->rx_status_lock, flags);
1501 fjes_hw_setup_epbuf(
1502 &hw->ep_shm_info[epidx].tx,
1503 netdev->dev_addr, netdev->mtu);
1504 spin_unlock_irqrestore(&hw->rx_status_lock,
1505 flags);
1506
1507 clear_bit(epidx, &hw->txrx_stop_req_bit);
1508 clear_bit(epidx, &unshare_watch_bitmask);
1509 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1510 }
1511
1512 if (test_bit(epidx, &unshare_watch_bitmask)) {
1513 spin_lock_irqsave(&hw->rx_status_lock, flags);
1514 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1515 ~FJES_RX_STOP_REQ_DONE;
1516 spin_unlock_irqrestore(&hw->rx_status_lock,
1517 flags);
1518 }
1519 }
1520 }
1521 }
1522
1523 static acpi_status
acpi_find_extended_socket_device(acpi_handle obj_handle,u32 level,void * context,void ** return_value)1524 acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1525 void *context, void **return_value)
1526 {
1527 struct acpi_device *device;
1528 bool *found = context;
1529 int result;
1530
1531 result = acpi_bus_get_device(obj_handle, &device);
1532 if (result)
1533 return AE_OK;
1534
1535 if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1536 return AE_OK;
1537
1538 if (!is_extended_socket_device(device))
1539 return AE_OK;
1540
1541 if (acpi_check_extended_socket_status(device))
1542 return AE_OK;
1543
1544 *found = true;
1545 return AE_CTRL_TERMINATE;
1546 }
1547
1548 /* fjes_init_module - Driver Registration Routine */
fjes_init_module(void)1549 static int __init fjes_init_module(void)
1550 {
1551 bool found = false;
1552 int result;
1553
1554 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1555 acpi_find_extended_socket_device, NULL, &found,
1556 NULL);
1557
1558 if (!found)
1559 return -ENODEV;
1560
1561 pr_info("%s - version %s - %s\n",
1562 fjes_driver_string, fjes_driver_version, fjes_copyright);
1563
1564 fjes_dbg_init();
1565
1566 result = platform_driver_register(&fjes_driver);
1567 if (result < 0) {
1568 fjes_dbg_exit();
1569 return result;
1570 }
1571
1572 result = acpi_bus_register_driver(&fjes_acpi_driver);
1573 if (result < 0)
1574 goto fail_acpi_driver;
1575
1576 return 0;
1577
1578 fail_acpi_driver:
1579 platform_driver_unregister(&fjes_driver);
1580 fjes_dbg_exit();
1581 return result;
1582 }
1583
1584 module_init(fjes_init_module);
1585
1586 /* fjes_exit_module - Driver Exit Cleanup Routine */
fjes_exit_module(void)1587 static void __exit fjes_exit_module(void)
1588 {
1589 acpi_bus_unregister_driver(&fjes_acpi_driver);
1590 platform_driver_unregister(&fjes_driver);
1591 fjes_dbg_exit();
1592 }
1593
1594 module_exit(fjes_exit_module);
1595