1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
3 
4 #include <linux/printk.h>
5 #include <linux/dynamic_debug.h>
6 #include <linux/module.h>
7 #include <linux/netdevice.h>
8 #include <linux/utsname.h>
9 #include <generated/utsrelease.h>
10 #include <linux/ctype.h>
11 
12 #include "ionic.h"
13 #include "ionic_bus.h"
14 #include "ionic_lif.h"
15 #include "ionic_debugfs.h"
16 
17 MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
18 MODULE_AUTHOR("Pensando Systems, Inc");
19 MODULE_LICENSE("GPL");
20 
21 static const char *ionic_error_to_str(enum ionic_status_code code)
22 {
23 	switch (code) {
24 	case IONIC_RC_SUCCESS:
25 		return "IONIC_RC_SUCCESS";
26 	case IONIC_RC_EVERSION:
27 		return "IONIC_RC_EVERSION";
28 	case IONIC_RC_EOPCODE:
29 		return "IONIC_RC_EOPCODE";
30 	case IONIC_RC_EIO:
31 		return "IONIC_RC_EIO";
32 	case IONIC_RC_EPERM:
33 		return "IONIC_RC_EPERM";
34 	case IONIC_RC_EQID:
35 		return "IONIC_RC_EQID";
36 	case IONIC_RC_EQTYPE:
37 		return "IONIC_RC_EQTYPE";
38 	case IONIC_RC_ENOENT:
39 		return "IONIC_RC_ENOENT";
40 	case IONIC_RC_EINTR:
41 		return "IONIC_RC_EINTR";
42 	case IONIC_RC_EAGAIN:
43 		return "IONIC_RC_EAGAIN";
44 	case IONIC_RC_ENOMEM:
45 		return "IONIC_RC_ENOMEM";
46 	case IONIC_RC_EFAULT:
47 		return "IONIC_RC_EFAULT";
48 	case IONIC_RC_EBUSY:
49 		return "IONIC_RC_EBUSY";
50 	case IONIC_RC_EEXIST:
51 		return "IONIC_RC_EEXIST";
52 	case IONIC_RC_EINVAL:
53 		return "IONIC_RC_EINVAL";
54 	case IONIC_RC_ENOSPC:
55 		return "IONIC_RC_ENOSPC";
56 	case IONIC_RC_ERANGE:
57 		return "IONIC_RC_ERANGE";
58 	case IONIC_RC_BAD_ADDR:
59 		return "IONIC_RC_BAD_ADDR";
60 	case IONIC_RC_DEV_CMD:
61 		return "IONIC_RC_DEV_CMD";
62 	case IONIC_RC_ENOSUPP:
63 		return "IONIC_RC_ENOSUPP";
64 	case IONIC_RC_ERROR:
65 		return "IONIC_RC_ERROR";
66 	case IONIC_RC_ERDMA:
67 		return "IONIC_RC_ERDMA";
68 	case IONIC_RC_EBAD_FW:
69 		return "IONIC_RC_EBAD_FW";
70 	default:
71 		return "IONIC_RC_UNKNOWN";
72 	}
73 }
74 
75 static int ionic_error_to_errno(enum ionic_status_code code)
76 {
77 	switch (code) {
78 	case IONIC_RC_SUCCESS:
79 		return 0;
80 	case IONIC_RC_EVERSION:
81 	case IONIC_RC_EQTYPE:
82 	case IONIC_RC_EQID:
83 	case IONIC_RC_EINVAL:
84 	case IONIC_RC_ENOSUPP:
85 		return -EINVAL;
86 	case IONIC_RC_EPERM:
87 		return -EPERM;
88 	case IONIC_RC_ENOENT:
89 		return -ENOENT;
90 	case IONIC_RC_EAGAIN:
91 		return -EAGAIN;
92 	case IONIC_RC_ENOMEM:
93 		return -ENOMEM;
94 	case IONIC_RC_EFAULT:
95 		return -EFAULT;
96 	case IONIC_RC_EBUSY:
97 		return -EBUSY;
98 	case IONIC_RC_EEXIST:
99 		return -EEXIST;
100 	case IONIC_RC_ENOSPC:
101 		return -ENOSPC;
102 	case IONIC_RC_ERANGE:
103 		return -ERANGE;
104 	case IONIC_RC_BAD_ADDR:
105 		return -EFAULT;
106 	case IONIC_RC_EOPCODE:
107 	case IONIC_RC_EINTR:
108 	case IONIC_RC_DEV_CMD:
109 	case IONIC_RC_ERROR:
110 	case IONIC_RC_ERDMA:
111 	case IONIC_RC_EIO:
112 	default:
113 		return -EIO;
114 	}
115 }
116 
117 static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
118 {
119 	switch (opcode) {
120 	case IONIC_CMD_NOP:
121 		return "IONIC_CMD_NOP";
122 	case IONIC_CMD_INIT:
123 		return "IONIC_CMD_INIT";
124 	case IONIC_CMD_RESET:
125 		return "IONIC_CMD_RESET";
126 	case IONIC_CMD_IDENTIFY:
127 		return "IONIC_CMD_IDENTIFY";
128 	case IONIC_CMD_GETATTR:
129 		return "IONIC_CMD_GETATTR";
130 	case IONIC_CMD_SETATTR:
131 		return "IONIC_CMD_SETATTR";
132 	case IONIC_CMD_PORT_IDENTIFY:
133 		return "IONIC_CMD_PORT_IDENTIFY";
134 	case IONIC_CMD_PORT_INIT:
135 		return "IONIC_CMD_PORT_INIT";
136 	case IONIC_CMD_PORT_RESET:
137 		return "IONIC_CMD_PORT_RESET";
138 	case IONIC_CMD_PORT_GETATTR:
139 		return "IONIC_CMD_PORT_GETATTR";
140 	case IONIC_CMD_PORT_SETATTR:
141 		return "IONIC_CMD_PORT_SETATTR";
142 	case IONIC_CMD_LIF_INIT:
143 		return "IONIC_CMD_LIF_INIT";
144 	case IONIC_CMD_LIF_RESET:
145 		return "IONIC_CMD_LIF_RESET";
146 	case IONIC_CMD_LIF_IDENTIFY:
147 		return "IONIC_CMD_LIF_IDENTIFY";
148 	case IONIC_CMD_LIF_SETATTR:
149 		return "IONIC_CMD_LIF_SETATTR";
150 	case IONIC_CMD_LIF_GETATTR:
151 		return "IONIC_CMD_LIF_GETATTR";
152 	case IONIC_CMD_LIF_SETPHC:
153 		return "IONIC_CMD_LIF_SETPHC";
154 	case IONIC_CMD_RX_MODE_SET:
155 		return "IONIC_CMD_RX_MODE_SET";
156 	case IONIC_CMD_RX_FILTER_ADD:
157 		return "IONIC_CMD_RX_FILTER_ADD";
158 	case IONIC_CMD_RX_FILTER_DEL:
159 		return "IONIC_CMD_RX_FILTER_DEL";
160 	case IONIC_CMD_Q_IDENTIFY:
161 		return "IONIC_CMD_Q_IDENTIFY";
162 	case IONIC_CMD_Q_INIT:
163 		return "IONIC_CMD_Q_INIT";
164 	case IONIC_CMD_Q_CONTROL:
165 		return "IONIC_CMD_Q_CONTROL";
166 	case IONIC_CMD_RDMA_RESET_LIF:
167 		return "IONIC_CMD_RDMA_RESET_LIF";
168 	case IONIC_CMD_RDMA_CREATE_EQ:
169 		return "IONIC_CMD_RDMA_CREATE_EQ";
170 	case IONIC_CMD_RDMA_CREATE_CQ:
171 		return "IONIC_CMD_RDMA_CREATE_CQ";
172 	case IONIC_CMD_RDMA_CREATE_ADMINQ:
173 		return "IONIC_CMD_RDMA_CREATE_ADMINQ";
174 	case IONIC_CMD_FW_DOWNLOAD:
175 		return "IONIC_CMD_FW_DOWNLOAD";
176 	case IONIC_CMD_FW_CONTROL:
177 		return "IONIC_CMD_FW_CONTROL";
178 	case IONIC_CMD_FW_DOWNLOAD_V1:
179 		return "IONIC_CMD_FW_DOWNLOAD_V1";
180 	case IONIC_CMD_FW_CONTROL_V1:
181 		return "IONIC_CMD_FW_CONTROL_V1";
182 	case IONIC_CMD_VF_GETATTR:
183 		return "IONIC_CMD_VF_GETATTR";
184 	case IONIC_CMD_VF_SETATTR:
185 		return "IONIC_CMD_VF_SETATTR";
186 	default:
187 		return "DEVCMD_UNKNOWN";
188 	}
189 }
190 
191 const char *ionic_vf_attr_to_str(enum ionic_vf_attr attr)
192 {
193 	switch (attr) {
194 	case IONIC_VF_ATTR_SPOOFCHK:
195 		return "IONIC_VF_ATTR_SPOOFCHK";
196 	case IONIC_VF_ATTR_TRUST:
197 		return "IONIC_VF_ATTR_TRUST";
198 	case IONIC_VF_ATTR_LINKSTATE:
199 		return "IONIC_VF_ATTR_LINKSTATE";
200 	case IONIC_VF_ATTR_MAC:
201 		return "IONIC_VF_ATTR_MAC";
202 	case IONIC_VF_ATTR_VLAN:
203 		return "IONIC_VF_ATTR_VLAN";
204 	case IONIC_VF_ATTR_RATE:
205 		return "IONIC_VF_ATTR_RATE";
206 	case IONIC_VF_ATTR_STATSADDR:
207 		return "IONIC_VF_ATTR_STATSADDR";
208 	default:
209 		return "IONIC_VF_ATTR_UNKNOWN";
210 	}
211 }
212 
213 static void ionic_adminq_flush(struct ionic_lif *lif)
214 {
215 	struct ionic_desc_info *desc_info;
216 	unsigned long irqflags;
217 	struct ionic_queue *q;
218 
219 	spin_lock_irqsave(&lif->adminq_lock, irqflags);
220 	if (!lif->adminqcq) {
221 		spin_unlock_irqrestore(&lif->adminq_lock, irqflags);
222 		return;
223 	}
224 
225 	q = &lif->adminqcq->q;
226 
227 	while (q->tail_idx != q->head_idx) {
228 		desc_info = &q->info[q->tail_idx];
229 		memset(desc_info->desc, 0, sizeof(union ionic_adminq_cmd));
230 		desc_info->cb = NULL;
231 		desc_info->cb_arg = NULL;
232 		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
233 	}
234 	spin_unlock_irqrestore(&lif->adminq_lock, irqflags);
235 }
236 
237 void ionic_adminq_netdev_err_print(struct ionic_lif *lif, u8 opcode,
238 				   u8 status, int err)
239 {
240 	const char *stat_str;
241 
242 	stat_str = (err == -ETIMEDOUT) ? "TIMEOUT" :
243 					 ionic_error_to_str(status);
244 
245 	netdev_err(lif->netdev, "%s (%d) failed: %s (%d)\n",
246 		   ionic_opcode_to_str(opcode), opcode, stat_str, err);
247 }
248 
249 static int ionic_adminq_check_err(struct ionic_lif *lif,
250 				  struct ionic_admin_ctx *ctx,
251 				  const bool timeout,
252 				  const bool do_msg)
253 {
254 	int err = 0;
255 
256 	if (ctx->comp.comp.status || timeout) {
257 		err = timeout ? -ETIMEDOUT :
258 				ionic_error_to_errno(ctx->comp.comp.status);
259 
260 		if (do_msg)
261 			ionic_adminq_netdev_err_print(lif, ctx->cmd.cmd.opcode,
262 						      ctx->comp.comp.status, err);
263 
264 		if (timeout)
265 			ionic_adminq_flush(lif);
266 	}
267 
268 	return err;
269 }
270 
271 static void ionic_adminq_cb(struct ionic_queue *q,
272 			    struct ionic_desc_info *desc_info,
273 			    struct ionic_cq_info *cq_info, void *cb_arg)
274 {
275 	struct ionic_admin_ctx *ctx = cb_arg;
276 	struct ionic_admin_comp *comp;
277 
278 	if (!ctx)
279 		return;
280 
281 	comp = cq_info->cq_desc;
282 
283 	memcpy(&ctx->comp, comp, sizeof(*comp));
284 
285 	dev_dbg(q->dev, "comp admin queue command:\n");
286 	dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
287 			 &ctx->comp, sizeof(ctx->comp), true);
288 
289 	complete_all(&ctx->work);
290 }
291 
292 int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
293 {
294 	struct ionic_desc_info *desc_info;
295 	unsigned long irqflags;
296 	struct ionic_queue *q;
297 	int err = 0;
298 
299 	spin_lock_irqsave(&lif->adminq_lock, irqflags);
300 	if (!lif->adminqcq) {
301 		spin_unlock_irqrestore(&lif->adminq_lock, irqflags);
302 		return -EIO;
303 	}
304 
305 	q = &lif->adminqcq->q;
306 
307 	if (!ionic_q_has_space(q, 1)) {
308 		err = -ENOSPC;
309 		goto err_out;
310 	}
311 
312 	err = ionic_heartbeat_check(lif->ionic);
313 	if (err)
314 		goto err_out;
315 
316 	desc_info = &q->info[q->head_idx];
317 	memcpy(desc_info->desc, &ctx->cmd, sizeof(ctx->cmd));
318 
319 	dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
320 	dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
321 			 &ctx->cmd, sizeof(ctx->cmd), true);
322 
323 	ionic_q_post(q, true, ionic_adminq_cb, ctx);
324 
325 err_out:
326 	spin_unlock_irqrestore(&lif->adminq_lock, irqflags);
327 
328 	return err;
329 }
330 
331 int ionic_adminq_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx,
332 		      const int err, const bool do_msg)
333 {
334 	struct net_device *netdev = lif->netdev;
335 	unsigned long time_limit;
336 	unsigned long time_start;
337 	unsigned long time_done;
338 	unsigned long remaining;
339 	const char *name;
340 
341 	name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
342 
343 	if (err) {
344 		if (do_msg && !test_bit(IONIC_LIF_F_FW_RESET, lif->state))
345 			netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
346 				   name, ctx->cmd.cmd.opcode, err);
347 		ctx->comp.comp.status = IONIC_RC_ERROR;
348 		return err;
349 	}
350 
351 	time_start = jiffies;
352 	time_limit = time_start + HZ * (ulong)DEVCMD_TIMEOUT;
353 	do {
354 		remaining = wait_for_completion_timeout(&ctx->work,
355 							IONIC_ADMINQ_TIME_SLICE);
356 
357 		/* check for done */
358 		if (remaining)
359 			break;
360 
361 		/* force a check of FW status and break out if FW reset */
362 		(void)ionic_heartbeat_check(lif->ionic);
363 		if ((test_bit(IONIC_LIF_F_FW_RESET, lif->state) &&
364 		     !lif->ionic->idev.fw_status_ready) ||
365 		    test_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) {
366 			if (do_msg)
367 				netdev_warn(netdev, "%s (%d) interrupted, FW in reset\n",
368 					    name, ctx->cmd.cmd.opcode);
369 			ctx->comp.comp.status = IONIC_RC_ERROR;
370 			return -ENXIO;
371 		}
372 
373 	} while (time_before(jiffies, time_limit));
374 	time_done = jiffies;
375 
376 	dev_dbg(lif->ionic->dev, "%s: elapsed %d msecs\n",
377 		__func__, jiffies_to_msecs(time_done - time_start));
378 
379 	return ionic_adminq_check_err(lif, ctx,
380 				      time_after_eq(time_done, time_limit),
381 				      do_msg);
382 }
383 
384 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
385 {
386 	int err;
387 
388 	err = ionic_adminq_post(lif, ctx);
389 
390 	return ionic_adminq_wait(lif, ctx, err, true);
391 }
392 
393 int ionic_adminq_post_wait_nomsg(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
394 {
395 	int err;
396 
397 	err = ionic_adminq_post(lif, ctx);
398 
399 	return ionic_adminq_wait(lif, ctx, err, false);
400 }
401 
402 static void ionic_dev_cmd_clean(struct ionic *ionic)
403 {
404 	struct ionic_dev *idev = &ionic->idev;
405 
406 	iowrite32(0, &idev->dev_cmd_regs->doorbell);
407 	memset_io(&idev->dev_cmd_regs->cmd, 0, sizeof(idev->dev_cmd_regs->cmd));
408 }
409 
410 void ionic_dev_cmd_dev_err_print(struct ionic *ionic, u8 opcode, u8 status,
411 				 int err)
412 {
413 	const char *stat_str;
414 
415 	stat_str = (err == -ETIMEDOUT) ? "TIMEOUT" :
416 					 ionic_error_to_str(status);
417 
418 	dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
419 		ionic_opcode_to_str(opcode), opcode, stat_str, err);
420 }
421 
422 static int __ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds,
423 				const bool do_msg)
424 {
425 	struct ionic_dev *idev = &ionic->idev;
426 	unsigned long start_time;
427 	unsigned long max_wait;
428 	unsigned long duration;
429 	int done = 0;
430 	bool fw_up;
431 	int opcode;
432 	int err;
433 
434 	/* Wait for dev cmd to complete, retrying if we get EAGAIN,
435 	 * but don't wait any longer than max_seconds.
436 	 */
437 	max_wait = jiffies + (max_seconds * HZ);
438 try_again:
439 	opcode = readb(&idev->dev_cmd_regs->cmd.cmd.opcode);
440 	start_time = jiffies;
441 	for (fw_up = ionic_is_fw_running(idev);
442 	     !done && fw_up && time_before(jiffies, max_wait);
443 	     fw_up = ionic_is_fw_running(idev)) {
444 		done = ionic_dev_cmd_done(idev);
445 		if (done)
446 			break;
447 		usleep_range(100, 200);
448 	}
449 	duration = jiffies - start_time;
450 
451 	dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
452 		ionic_opcode_to_str(opcode), opcode,
453 		done, duration / HZ, duration);
454 
455 	if (!done && !fw_up) {
456 		ionic_dev_cmd_clean(ionic);
457 		dev_warn(ionic->dev, "DEVCMD %s (%d) interrupted - FW is down\n",
458 			 ionic_opcode_to_str(opcode), opcode);
459 		return -ENXIO;
460 	}
461 
462 	if (!done && !time_before(jiffies, max_wait)) {
463 		ionic_dev_cmd_clean(ionic);
464 		dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
465 			 ionic_opcode_to_str(opcode), opcode, max_seconds);
466 		return -ETIMEDOUT;
467 	}
468 
469 	err = ionic_dev_cmd_status(&ionic->idev);
470 	if (err) {
471 		if (err == IONIC_RC_EAGAIN &&
472 		    time_before(jiffies, (max_wait - HZ))) {
473 			dev_dbg(ionic->dev, "DEV_CMD %s (%d), %s (%d) retrying...\n",
474 				ionic_opcode_to_str(opcode), opcode,
475 				ionic_error_to_str(err), err);
476 
477 			msleep(1000);
478 			iowrite32(0, &idev->dev_cmd_regs->done);
479 			iowrite32(1, &idev->dev_cmd_regs->doorbell);
480 			goto try_again;
481 		}
482 
483 		if (!(opcode == IONIC_CMD_FW_CONTROL && err == IONIC_RC_EAGAIN))
484 			if (do_msg)
485 				ionic_dev_cmd_dev_err_print(ionic, opcode, err,
486 							    ionic_error_to_errno(err));
487 
488 		return ionic_error_to_errno(err);
489 	}
490 
491 	return 0;
492 }
493 
494 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
495 {
496 	return __ionic_dev_cmd_wait(ionic, max_seconds, true);
497 }
498 
499 int ionic_dev_cmd_wait_nomsg(struct ionic *ionic, unsigned long max_seconds)
500 {
501 	return __ionic_dev_cmd_wait(ionic, max_seconds, false);
502 }
503 
504 int ionic_setup(struct ionic *ionic)
505 {
506 	int err;
507 
508 	err = ionic_dev_setup(ionic);
509 	if (err)
510 		return err;
511 	ionic_reset(ionic);
512 
513 	return 0;
514 }
515 
516 int ionic_identify(struct ionic *ionic)
517 {
518 	struct ionic_identity *ident = &ionic->ident;
519 	struct ionic_dev *idev = &ionic->idev;
520 	size_t sz;
521 	int err;
522 
523 	memset(ident, 0, sizeof(*ident));
524 
525 	ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
526 	strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
527 		sizeof(ident->drv.driver_ver_str) - 1);
528 
529 	mutex_lock(&ionic->dev_cmd_lock);
530 
531 	sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
532 	memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
533 
534 	ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
535 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
536 	if (!err) {
537 		sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
538 		memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
539 	}
540 	mutex_unlock(&ionic->dev_cmd_lock);
541 
542 	if (err) {
543 		dev_err(ionic->dev, "Cannot identify ionic: %d\n", err);
544 		goto err_out;
545 	}
546 
547 	if (isprint(idev->dev_info.fw_version[0]) &&
548 	    isascii(idev->dev_info.fw_version[0]))
549 		dev_info(ionic->dev, "FW: %.*s\n",
550 			 (int)(sizeof(idev->dev_info.fw_version) - 1),
551 			 idev->dev_info.fw_version);
552 	else
553 		dev_info(ionic->dev, "FW: (invalid string) 0x%02x 0x%02x 0x%02x 0x%02x ...\n",
554 			 (u8)idev->dev_info.fw_version[0],
555 			 (u8)idev->dev_info.fw_version[1],
556 			 (u8)idev->dev_info.fw_version[2],
557 			 (u8)idev->dev_info.fw_version[3]);
558 
559 	err = ionic_lif_identify(ionic, IONIC_LIF_TYPE_CLASSIC,
560 				 &ionic->ident.lif);
561 	if (err) {
562 		dev_err(ionic->dev, "Cannot identify LIFs: %d\n", err);
563 		goto err_out;
564 	}
565 
566 	return 0;
567 
568 err_out:
569 	return err;
570 }
571 
572 int ionic_init(struct ionic *ionic)
573 {
574 	struct ionic_dev *idev = &ionic->idev;
575 	int err;
576 
577 	mutex_lock(&ionic->dev_cmd_lock);
578 	ionic_dev_cmd_init(idev);
579 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
580 	mutex_unlock(&ionic->dev_cmd_lock);
581 
582 	return err;
583 }
584 
585 int ionic_reset(struct ionic *ionic)
586 {
587 	struct ionic_dev *idev = &ionic->idev;
588 	int err;
589 
590 	if (!ionic_is_fw_running(idev))
591 		return 0;
592 
593 	mutex_lock(&ionic->dev_cmd_lock);
594 	ionic_dev_cmd_reset(idev);
595 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
596 	mutex_unlock(&ionic->dev_cmd_lock);
597 
598 	return err;
599 }
600 
601 int ionic_port_identify(struct ionic *ionic)
602 {
603 	struct ionic_identity *ident = &ionic->ident;
604 	struct ionic_dev *idev = &ionic->idev;
605 	size_t sz;
606 	int err;
607 
608 	mutex_lock(&ionic->dev_cmd_lock);
609 
610 	ionic_dev_cmd_port_identify(idev);
611 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
612 	if (!err) {
613 		sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
614 		memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
615 	}
616 
617 	mutex_unlock(&ionic->dev_cmd_lock);
618 
619 	return err;
620 }
621 
622 int ionic_port_init(struct ionic *ionic)
623 {
624 	struct ionic_identity *ident = &ionic->ident;
625 	struct ionic_dev *idev = &ionic->idev;
626 	size_t sz;
627 	int err;
628 
629 	if (!idev->port_info) {
630 		idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
631 		idev->port_info = dma_alloc_coherent(ionic->dev,
632 						     idev->port_info_sz,
633 						     &idev->port_info_pa,
634 						     GFP_KERNEL);
635 		if (!idev->port_info)
636 			return -ENOMEM;
637 	}
638 
639 	sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
640 
641 	mutex_lock(&ionic->dev_cmd_lock);
642 
643 	memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
644 	ionic_dev_cmd_port_init(idev);
645 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
646 
647 	ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
648 	(void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
649 
650 	mutex_unlock(&ionic->dev_cmd_lock);
651 	if (err) {
652 		dev_err(ionic->dev, "Failed to init port\n");
653 		dma_free_coherent(ionic->dev, idev->port_info_sz,
654 				  idev->port_info, idev->port_info_pa);
655 		idev->port_info = NULL;
656 		idev->port_info_pa = 0;
657 	}
658 
659 	return err;
660 }
661 
662 int ionic_port_reset(struct ionic *ionic)
663 {
664 	struct ionic_dev *idev = &ionic->idev;
665 	int err = 0;
666 
667 	if (!idev->port_info)
668 		return 0;
669 
670 	if (ionic_is_fw_running(idev)) {
671 		mutex_lock(&ionic->dev_cmd_lock);
672 		ionic_dev_cmd_port_reset(idev);
673 		err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
674 		mutex_unlock(&ionic->dev_cmd_lock);
675 	}
676 
677 	dma_free_coherent(ionic->dev, idev->port_info_sz,
678 			  idev->port_info, idev->port_info_pa);
679 
680 	idev->port_info = NULL;
681 	idev->port_info_pa = 0;
682 
683 	return err;
684 }
685 
686 static int __init ionic_init_module(void)
687 {
688 	ionic_debugfs_create();
689 	return ionic_bus_register_driver();
690 }
691 
692 static void __exit ionic_cleanup_module(void)
693 {
694 	ionic_bus_unregister_driver();
695 	ionic_debugfs_destroy();
696 
697 	pr_info("%s removed\n", IONIC_DRV_NAME);
698 }
699 
700 module_init(ionic_init_module);
701 module_exit(ionic_cleanup_module);
702