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
11 #include "ionic.h"
12 #include "ionic_bus.h"
13 #include "ionic_lif.h"
14 #include "ionic_debugfs.h"
15
16 MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
17 MODULE_AUTHOR("Pensando Systems, Inc");
18 MODULE_LICENSE("GPL");
19
ionic_error_to_str(enum ionic_status_code code)20 static const char *ionic_error_to_str(enum ionic_status_code code)
21 {
22 switch (code) {
23 case IONIC_RC_SUCCESS:
24 return "IONIC_RC_SUCCESS";
25 case IONIC_RC_EVERSION:
26 return "IONIC_RC_EVERSION";
27 case IONIC_RC_EOPCODE:
28 return "IONIC_RC_EOPCODE";
29 case IONIC_RC_EIO:
30 return "IONIC_RC_EIO";
31 case IONIC_RC_EPERM:
32 return "IONIC_RC_EPERM";
33 case IONIC_RC_EQID:
34 return "IONIC_RC_EQID";
35 case IONIC_RC_EQTYPE:
36 return "IONIC_RC_EQTYPE";
37 case IONIC_RC_ENOENT:
38 return "IONIC_RC_ENOENT";
39 case IONIC_RC_EINTR:
40 return "IONIC_RC_EINTR";
41 case IONIC_RC_EAGAIN:
42 return "IONIC_RC_EAGAIN";
43 case IONIC_RC_ENOMEM:
44 return "IONIC_RC_ENOMEM";
45 case IONIC_RC_EFAULT:
46 return "IONIC_RC_EFAULT";
47 case IONIC_RC_EBUSY:
48 return "IONIC_RC_EBUSY";
49 case IONIC_RC_EEXIST:
50 return "IONIC_RC_EEXIST";
51 case IONIC_RC_EINVAL:
52 return "IONIC_RC_EINVAL";
53 case IONIC_RC_ENOSPC:
54 return "IONIC_RC_ENOSPC";
55 case IONIC_RC_ERANGE:
56 return "IONIC_RC_ERANGE";
57 case IONIC_RC_BAD_ADDR:
58 return "IONIC_RC_BAD_ADDR";
59 case IONIC_RC_DEV_CMD:
60 return "IONIC_RC_DEV_CMD";
61 case IONIC_RC_ENOSUPP:
62 return "IONIC_RC_ENOSUPP";
63 case IONIC_RC_ERROR:
64 return "IONIC_RC_ERROR";
65 case IONIC_RC_ERDMA:
66 return "IONIC_RC_ERDMA";
67 case IONIC_RC_EBAD_FW:
68 return "IONIC_RC_EBAD_FW";
69 default:
70 return "IONIC_RC_UNKNOWN";
71 }
72 }
73
ionic_error_to_errno(enum ionic_status_code code)74 static int ionic_error_to_errno(enum ionic_status_code code)
75 {
76 switch (code) {
77 case IONIC_RC_SUCCESS:
78 return 0;
79 case IONIC_RC_EVERSION:
80 case IONIC_RC_EQTYPE:
81 case IONIC_RC_EQID:
82 case IONIC_RC_EINVAL:
83 case IONIC_RC_ENOSUPP:
84 return -EINVAL;
85 case IONIC_RC_EPERM:
86 return -EPERM;
87 case IONIC_RC_ENOENT:
88 return -ENOENT;
89 case IONIC_RC_EAGAIN:
90 return -EAGAIN;
91 case IONIC_RC_ENOMEM:
92 return -ENOMEM;
93 case IONIC_RC_EFAULT:
94 return -EFAULT;
95 case IONIC_RC_EBUSY:
96 return -EBUSY;
97 case IONIC_RC_EEXIST:
98 return -EEXIST;
99 case IONIC_RC_ENOSPC:
100 return -ENOSPC;
101 case IONIC_RC_ERANGE:
102 return -ERANGE;
103 case IONIC_RC_BAD_ADDR:
104 return -EFAULT;
105 case IONIC_RC_EOPCODE:
106 case IONIC_RC_EINTR:
107 case IONIC_RC_DEV_CMD:
108 case IONIC_RC_ERROR:
109 case IONIC_RC_ERDMA:
110 case IONIC_RC_EIO:
111 default:
112 return -EIO;
113 }
114 }
115
ionic_opcode_to_str(enum ionic_cmd_opcode opcode)116 static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
117 {
118 switch (opcode) {
119 case IONIC_CMD_NOP:
120 return "IONIC_CMD_NOP";
121 case IONIC_CMD_INIT:
122 return "IONIC_CMD_INIT";
123 case IONIC_CMD_RESET:
124 return "IONIC_CMD_RESET";
125 case IONIC_CMD_IDENTIFY:
126 return "IONIC_CMD_IDENTIFY";
127 case IONIC_CMD_GETATTR:
128 return "IONIC_CMD_GETATTR";
129 case IONIC_CMD_SETATTR:
130 return "IONIC_CMD_SETATTR";
131 case IONIC_CMD_PORT_IDENTIFY:
132 return "IONIC_CMD_PORT_IDENTIFY";
133 case IONIC_CMD_PORT_INIT:
134 return "IONIC_CMD_PORT_INIT";
135 case IONIC_CMD_PORT_RESET:
136 return "IONIC_CMD_PORT_RESET";
137 case IONIC_CMD_PORT_GETATTR:
138 return "IONIC_CMD_PORT_GETATTR";
139 case IONIC_CMD_PORT_SETATTR:
140 return "IONIC_CMD_PORT_SETATTR";
141 case IONIC_CMD_LIF_INIT:
142 return "IONIC_CMD_LIF_INIT";
143 case IONIC_CMD_LIF_RESET:
144 return "IONIC_CMD_LIF_RESET";
145 case IONIC_CMD_LIF_IDENTIFY:
146 return "IONIC_CMD_LIF_IDENTIFY";
147 case IONIC_CMD_LIF_SETATTR:
148 return "IONIC_CMD_LIF_SETATTR";
149 case IONIC_CMD_LIF_GETATTR:
150 return "IONIC_CMD_LIF_GETATTR";
151 case IONIC_CMD_RX_MODE_SET:
152 return "IONIC_CMD_RX_MODE_SET";
153 case IONIC_CMD_RX_FILTER_ADD:
154 return "IONIC_CMD_RX_FILTER_ADD";
155 case IONIC_CMD_RX_FILTER_DEL:
156 return "IONIC_CMD_RX_FILTER_DEL";
157 case IONIC_CMD_Q_IDENTIFY:
158 return "IONIC_CMD_Q_IDENTIFY";
159 case IONIC_CMD_Q_INIT:
160 return "IONIC_CMD_Q_INIT";
161 case IONIC_CMD_Q_CONTROL:
162 return "IONIC_CMD_Q_CONTROL";
163 case IONIC_CMD_RDMA_RESET_LIF:
164 return "IONIC_CMD_RDMA_RESET_LIF";
165 case IONIC_CMD_RDMA_CREATE_EQ:
166 return "IONIC_CMD_RDMA_CREATE_EQ";
167 case IONIC_CMD_RDMA_CREATE_CQ:
168 return "IONIC_CMD_RDMA_CREATE_CQ";
169 case IONIC_CMD_RDMA_CREATE_ADMINQ:
170 return "IONIC_CMD_RDMA_CREATE_ADMINQ";
171 case IONIC_CMD_FW_DOWNLOAD:
172 return "IONIC_CMD_FW_DOWNLOAD";
173 case IONIC_CMD_FW_CONTROL:
174 return "IONIC_CMD_FW_CONTROL";
175 case IONIC_CMD_FW_DOWNLOAD_V1:
176 return "IONIC_CMD_FW_DOWNLOAD_V1";
177 case IONIC_CMD_FW_CONTROL_V1:
178 return "IONIC_CMD_FW_CONTROL_V1";
179 case IONIC_CMD_VF_GETATTR:
180 return "IONIC_CMD_VF_GETATTR";
181 case IONIC_CMD_VF_SETATTR:
182 return "IONIC_CMD_VF_SETATTR";
183 default:
184 return "DEVCMD_UNKNOWN";
185 }
186 }
187
ionic_adminq_flush(struct ionic_lif * lif)188 static void ionic_adminq_flush(struct ionic_lif *lif)
189 {
190 struct ionic_queue *q = &lif->adminqcq->q;
191 struct ionic_desc_info *desc_info;
192
193 spin_lock(&lif->adminq_lock);
194
195 while (q->tail_idx != q->head_idx) {
196 desc_info = &q->info[q->tail_idx];
197 memset(desc_info->desc, 0, sizeof(union ionic_adminq_cmd));
198 desc_info->cb = NULL;
199 desc_info->cb_arg = NULL;
200 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
201 }
202 spin_unlock(&lif->adminq_lock);
203 }
204
ionic_adminq_check_err(struct ionic_lif * lif,struct ionic_admin_ctx * ctx,bool timeout)205 static int ionic_adminq_check_err(struct ionic_lif *lif,
206 struct ionic_admin_ctx *ctx,
207 bool timeout)
208 {
209 struct net_device *netdev = lif->netdev;
210 const char *opcode_str;
211 const char *status_str;
212 int err = 0;
213
214 if (ctx->comp.comp.status || timeout) {
215 opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
216 status_str = ionic_error_to_str(ctx->comp.comp.status);
217 err = timeout ? -ETIMEDOUT :
218 ionic_error_to_errno(ctx->comp.comp.status);
219
220 netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
221 opcode_str, ctx->cmd.cmd.opcode,
222 timeout ? "TIMEOUT" : status_str, err);
223
224 if (timeout)
225 ionic_adminq_flush(lif);
226 }
227
228 return err;
229 }
230
ionic_adminq_cb(struct ionic_queue * q,struct ionic_desc_info * desc_info,struct ionic_cq_info * cq_info,void * cb_arg)231 static void ionic_adminq_cb(struct ionic_queue *q,
232 struct ionic_desc_info *desc_info,
233 struct ionic_cq_info *cq_info, void *cb_arg)
234 {
235 struct ionic_admin_ctx *ctx = cb_arg;
236 struct ionic_admin_comp *comp;
237 struct device *dev;
238
239 if (!ctx)
240 return;
241
242 comp = cq_info->cq_desc;
243 dev = &q->lif->netdev->dev;
244
245 memcpy(&ctx->comp, comp, sizeof(*comp));
246
247 dev_dbg(dev, "comp admin queue command:\n");
248 dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
249 &ctx->comp, sizeof(ctx->comp), true);
250
251 complete_all(&ctx->work);
252 }
253
ionic_adminq_post(struct ionic_lif * lif,struct ionic_admin_ctx * ctx)254 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
255 {
256 struct ionic_desc_info *desc_info;
257 struct ionic_queue *q;
258 int err = 0;
259
260 if (!lif->adminqcq)
261 return -EIO;
262
263 q = &lif->adminqcq->q;
264
265 spin_lock(&lif->adminq_lock);
266 if (!ionic_q_has_space(q, 1)) {
267 err = -ENOSPC;
268 goto err_out;
269 }
270
271 err = ionic_heartbeat_check(lif->ionic);
272 if (err)
273 goto err_out;
274
275 desc_info = &q->info[q->head_idx];
276 memcpy(desc_info->desc, &ctx->cmd, sizeof(ctx->cmd));
277
278 dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
279 dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
280 &ctx->cmd, sizeof(ctx->cmd), true);
281
282 ionic_q_post(q, true, ionic_adminq_cb, ctx);
283
284 err_out:
285 spin_unlock(&lif->adminq_lock);
286
287 return err;
288 }
289
ionic_adminq_post_wait(struct ionic_lif * lif,struct ionic_admin_ctx * ctx)290 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
291 {
292 struct net_device *netdev = lif->netdev;
293 unsigned long remaining;
294 const char *name;
295 int err;
296
297 err = ionic_adminq_post(lif, ctx);
298 if (err) {
299 if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
300 name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
301 netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
302 name, ctx->cmd.cmd.opcode, err);
303 }
304 return err;
305 }
306
307 remaining = wait_for_completion_timeout(&ctx->work,
308 HZ * (ulong)DEVCMD_TIMEOUT);
309 return ionic_adminq_check_err(lif, ctx, (remaining == 0));
310 }
311
ionic_dev_cmd_clean(struct ionic * ionic)312 static void ionic_dev_cmd_clean(struct ionic *ionic)
313 {
314 struct ionic_dev *idev = &ionic->idev;
315
316 iowrite32(0, &idev->dev_cmd_regs->doorbell);
317 memset_io(&idev->dev_cmd_regs->cmd, 0, sizeof(idev->dev_cmd_regs->cmd));
318 }
319
ionic_dev_cmd_wait(struct ionic * ionic,unsigned long max_seconds)320 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
321 {
322 struct ionic_dev *idev = &ionic->idev;
323 unsigned long start_time;
324 unsigned long max_wait;
325 unsigned long duration;
326 int opcode;
327 int hb = 0;
328 int done;
329 int err;
330
331 /* Wait for dev cmd to complete, retrying if we get EAGAIN,
332 * but don't wait any longer than max_seconds.
333 */
334 max_wait = jiffies + (max_seconds * HZ);
335 try_again:
336 opcode = idev->opcode;
337 start_time = jiffies;
338 do {
339 done = ionic_dev_cmd_done(idev);
340 if (done)
341 break;
342 usleep_range(100, 200);
343
344 /* Don't check the heartbeat on FW_CONTROL commands as they are
345 * notorious for interrupting the firmware's heartbeat update.
346 */
347 if (opcode != IONIC_CMD_FW_CONTROL)
348 hb = ionic_heartbeat_check(ionic);
349 } while (!done && !hb && time_before(jiffies, max_wait));
350 duration = jiffies - start_time;
351
352 dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
353 ionic_opcode_to_str(opcode), opcode,
354 done, duration / HZ, duration);
355
356 if (!done && hb) {
357 /* It is possible (but unlikely) that FW was busy and missed a
358 * heartbeat check but is still alive and will process this
359 * request, so don't clean the dev_cmd in this case.
360 */
361 dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
362 ionic_opcode_to_str(opcode), opcode);
363 return -ENXIO;
364 }
365
366 if (!done && !time_before(jiffies, max_wait)) {
367 ionic_dev_cmd_clean(ionic);
368 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
369 ionic_opcode_to_str(opcode), opcode, max_seconds);
370 return -ETIMEDOUT;
371 }
372
373 err = ionic_dev_cmd_status(&ionic->idev);
374 if (err) {
375 if (err == IONIC_RC_EAGAIN &&
376 time_before(jiffies, (max_wait - HZ))) {
377 dev_dbg(ionic->dev, "DEV_CMD %s (%d), %s (%d) retrying...\n",
378 ionic_opcode_to_str(opcode), opcode,
379 ionic_error_to_str(err), err);
380
381 iowrite32(0, &idev->dev_cmd_regs->done);
382 msleep(1000);
383 iowrite32(1, &idev->dev_cmd_regs->doorbell);
384 goto try_again;
385 }
386
387 if (!(opcode == IONIC_CMD_FW_CONTROL && err == IONIC_RC_EAGAIN))
388 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
389 ionic_opcode_to_str(opcode), opcode,
390 ionic_error_to_str(err), err);
391
392 return ionic_error_to_errno(err);
393 }
394
395 ionic_dev_cmd_clean(ionic);
396
397 return 0;
398 }
399
ionic_setup(struct ionic * ionic)400 int ionic_setup(struct ionic *ionic)
401 {
402 int err;
403
404 err = ionic_dev_setup(ionic);
405 if (err)
406 return err;
407 ionic_reset(ionic);
408
409 return 0;
410 }
411
ionic_identify(struct ionic * ionic)412 int ionic_identify(struct ionic *ionic)
413 {
414 struct ionic_identity *ident = &ionic->ident;
415 struct ionic_dev *idev = &ionic->idev;
416 size_t sz;
417 int err;
418
419 memset(ident, 0, sizeof(*ident));
420
421 ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
422 strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
423 sizeof(ident->drv.driver_ver_str) - 1);
424
425 mutex_lock(&ionic->dev_cmd_lock);
426
427 sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
428 memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
429
430 ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
431 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
432 if (!err) {
433 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
434 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
435 }
436 mutex_unlock(&ionic->dev_cmd_lock);
437
438 if (err) {
439 dev_err(ionic->dev, "Cannot identify ionic: %dn", err);
440 goto err_out;
441 }
442
443 err = ionic_lif_identify(ionic, IONIC_LIF_TYPE_CLASSIC,
444 &ionic->ident.lif);
445 if (err) {
446 dev_err(ionic->dev, "Cannot identify LIFs: %d\n", err);
447 goto err_out;
448 }
449
450 return 0;
451
452 err_out:
453 return err;
454 }
455
ionic_init(struct ionic * ionic)456 int ionic_init(struct ionic *ionic)
457 {
458 struct ionic_dev *idev = &ionic->idev;
459 int err;
460
461 mutex_lock(&ionic->dev_cmd_lock);
462 ionic_dev_cmd_init(idev);
463 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
464 mutex_unlock(&ionic->dev_cmd_lock);
465
466 return err;
467 }
468
ionic_reset(struct ionic * ionic)469 int ionic_reset(struct ionic *ionic)
470 {
471 struct ionic_dev *idev = &ionic->idev;
472 int err;
473
474 mutex_lock(&ionic->dev_cmd_lock);
475 ionic_dev_cmd_reset(idev);
476 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
477 mutex_unlock(&ionic->dev_cmd_lock);
478
479 return err;
480 }
481
ionic_port_identify(struct ionic * ionic)482 int ionic_port_identify(struct ionic *ionic)
483 {
484 struct ionic_identity *ident = &ionic->ident;
485 struct ionic_dev *idev = &ionic->idev;
486 size_t sz;
487 int err;
488
489 mutex_lock(&ionic->dev_cmd_lock);
490
491 ionic_dev_cmd_port_identify(idev);
492 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
493 if (!err) {
494 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
495 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
496 }
497
498 mutex_unlock(&ionic->dev_cmd_lock);
499
500 return err;
501 }
502
ionic_port_init(struct ionic * ionic)503 int ionic_port_init(struct ionic *ionic)
504 {
505 struct ionic_identity *ident = &ionic->ident;
506 struct ionic_dev *idev = &ionic->idev;
507 size_t sz;
508 int err;
509
510 if (!idev->port_info) {
511 idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
512 idev->port_info = dma_alloc_coherent(ionic->dev,
513 idev->port_info_sz,
514 &idev->port_info_pa,
515 GFP_KERNEL);
516 if (!idev->port_info) {
517 dev_err(ionic->dev, "Failed to allocate port info\n");
518 return -ENOMEM;
519 }
520 }
521
522 sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
523
524 mutex_lock(&ionic->dev_cmd_lock);
525
526 memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
527 ionic_dev_cmd_port_init(idev);
528 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
529
530 ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
531 (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
532
533 mutex_unlock(&ionic->dev_cmd_lock);
534 if (err) {
535 dev_err(ionic->dev, "Failed to init port\n");
536 dma_free_coherent(ionic->dev, idev->port_info_sz,
537 idev->port_info, idev->port_info_pa);
538 idev->port_info = NULL;
539 idev->port_info_pa = 0;
540 }
541
542 return err;
543 }
544
ionic_port_reset(struct ionic * ionic)545 int ionic_port_reset(struct ionic *ionic)
546 {
547 struct ionic_dev *idev = &ionic->idev;
548 int err;
549
550 if (!idev->port_info)
551 return 0;
552
553 mutex_lock(&ionic->dev_cmd_lock);
554 ionic_dev_cmd_port_reset(idev);
555 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
556 mutex_unlock(&ionic->dev_cmd_lock);
557
558 dma_free_coherent(ionic->dev, idev->port_info_sz,
559 idev->port_info, idev->port_info_pa);
560
561 idev->port_info = NULL;
562 idev->port_info_pa = 0;
563
564 if (err)
565 dev_err(ionic->dev, "Failed to reset port\n");
566
567 return err;
568 }
569
ionic_init_module(void)570 static int __init ionic_init_module(void)
571 {
572 int ret;
573
574 ionic_debugfs_create();
575 ret = ionic_bus_register_driver();
576 if (ret)
577 ionic_debugfs_destroy();
578
579 return ret;
580 }
581
ionic_cleanup_module(void)582 static void __exit ionic_cleanup_module(void)
583 {
584 ionic_bus_unregister_driver();
585 ionic_debugfs_destroy();
586
587 pr_info("%s removed\n", IONIC_DRV_NAME);
588 }
589
590 module_init(ionic_init_module);
591 module_exit(ionic_cleanup_module);
592