1/* Broadcom NetXtreme-C/E network driver.
2 *
3 * Copyright (c) 2014-2016 Broadcom Corporation
4 * Copyright (c) 2016-2017 Broadcom Limited
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 */
10
11#include <linux/netdevice.h>
12#include <linux/types.h>
13#include <linux/errno.h>
14#include <linux/rtnetlink.h>
15#include <linux/interrupt.h>
16#include <linux/pci.h>
17#include <linux/etherdevice.h>
18#include <rdma/ib_verbs.h>
19#include <linux/bnxt/hsi.h>
20#include "bnxt.h"
21#include "bnxt_hwrm.h"
22#include "bnxt_dcb.h"
23
24#ifdef CONFIG_BNXT_DCB
25static int bnxt_queue_to_tc(struct bnxt *bp, u8 queue_id)
26{
27 int i, j;
28
29 for (i = 0; i < bp->max_tc; i++) {
30 if (bp->q_info[i].queue_id == queue_id) {
31 for (j = 0; j < bp->max_tc; j++) {
32 if (bp->tc_to_qidx[j] == i)
33 return j;
34 }
35 }
36 }
37 return -EINVAL;
38}
39
40static int bnxt_hwrm_queue_pri2cos_cfg(struct bnxt *bp, struct ieee_ets *ets)
41{
42 struct hwrm_queue_pri2cos_cfg_input *req;
43 u8 *pri2cos;
44 int rc, i;
45
46 rc = hwrm_req_init(bp, req, HWRM_QUEUE_PRI2COS_CFG);
47 if (rc)
48 return rc;
49
50 req->flags = cpu_to_le32(QUEUE_PRI2COS_CFG_REQ_FLAGS_PATH_BIDIR |
51 QUEUE_PRI2COS_CFG_REQ_FLAGS_IVLAN);
52
53 pri2cos = &req->pri0_cos_queue_id;
54 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
55 u8 qidx;
56
57 req->enables |= cpu_to_le32(
58 QUEUE_PRI2COS_CFG_REQ_ENABLES_PRI0_COS_QUEUE_ID << i);
59
60 qidx = bp->tc_to_qidx[ets->prio_tc[i]];
61 pri2cos[i] = bp->q_info[qidx].queue_id;
62 }
63 return hwrm_req_send(bp, req);
64}
65
66static int bnxt_hwrm_queue_pri2cos_qcfg(struct bnxt *bp, struct ieee_ets *ets)
67{
68 struct hwrm_queue_pri2cos_qcfg_output *resp;
69 struct hwrm_queue_pri2cos_qcfg_input *req;
70 int rc;
71
72 rc = hwrm_req_init(bp, req, HWRM_QUEUE_PRI2COS_QCFG);
73 if (rc)
74 return rc;
75
76 req->flags = cpu_to_le32(QUEUE_PRI2COS_QCFG_REQ_FLAGS_IVLAN);
77 resp = hwrm_req_hold(bp, req);
78 rc = hwrm_req_send(bp, req);
79 if (!rc) {
80 u8 *pri2cos = &resp->pri0_cos_queue_id;
81 int i;
82
83 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
84 u8 queue_id = pri2cos[i];
85 int tc;
86
87 tc = bnxt_queue_to_tc(bp, queue_id);
88 if (tc >= 0)
89 ets->prio_tc[i] = tc;
90 }
91 }
92 hwrm_req_drop(bp, req);
93 return rc;
94}
95
96static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
97 u8 max_tc)
98{
99 struct hwrm_queue_cos2bw_cfg_input *req;
100 struct bnxt_cos2bw_cfg cos2bw;
101 int rc, i;
102
103 rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_CFG);
104 if (rc)
105 return rc;
106
107 for (i = 0; i < max_tc; i++) {
108 u8 qidx = bp->tc_to_qidx[i];
109
110 req->enables |= cpu_to_le32(
111 QUEUE_COS2BW_CFG_REQ_ENABLES_COS_QUEUE_ID0_VALID <<
112 qidx);
113
114 memset(&cos2bw, 0, sizeof(cos2bw));
115 cos2bw.queue_id = bp->q_info[qidx].queue_id;
116 if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_STRICT) {
117 cos2bw.tsa =
118 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP;
119 cos2bw.pri_lvl = i;
120 } else {
121 cos2bw.tsa =
122 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_ETS;
123 cos2bw.bw_weight = ets->tc_tx_bw[i];
124 /* older firmware requires min_bw to be set to the
125 * same weight value in percent.
126 */
127 cos2bw.min_bw =
128 cpu_to_le32((ets->tc_tx_bw[i] * 100) |
129 BW_VALUE_UNIT_PERCENT1_100);
130 }
131 if (qidx == 0) {
132 req->queue_id0 = cos2bw.queue_id;
133 req->queue_id0_min_bw = cos2bw.min_bw;
134 req->queue_id0_max_bw = cos2bw.max_bw;
135 req->queue_id0_tsa_assign = cos2bw.tsa;
136 req->queue_id0_pri_lvl = cos2bw.pri_lvl;
137 req->queue_id0_bw_weight = cos2bw.bw_weight;
138 } else {
139 memcpy(&req->cfg[i - 1], &cos2bw.cfg, sizeof(cos2bw.cfg));
140 }
141 }
142 return hwrm_req_send(bp, req);
143}
144
145static int bnxt_hwrm_queue_cos2bw_qcfg(struct bnxt *bp, struct ieee_ets *ets)
146{
147 struct hwrm_queue_cos2bw_qcfg_output *resp;
148 struct hwrm_queue_cos2bw_qcfg_input *req;
149 struct bnxt_cos2bw_cfg cos2bw;
150 int rc, i;
151
152 rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_QCFG);
153 if (rc)
154 return rc;
155
156 resp = hwrm_req_hold(bp, req);
157 rc = hwrm_req_send(bp, req);
158 if (rc) {
159 hwrm_req_drop(bp, req);
160 return rc;
161 }
162
163 for (i = 0; i < bp->max_tc; i++) {
164 int tc;
165
166 if (i == 0) {
167 cos2bw.queue_id = resp->queue_id0;
168 cos2bw.min_bw = resp->queue_id0_min_bw;
169 cos2bw.max_bw = resp->queue_id0_max_bw;
170 cos2bw.tsa = resp->queue_id0_tsa_assign;
171 cos2bw.pri_lvl = resp->queue_id0_pri_lvl;
172 cos2bw.bw_weight = resp->queue_id0_bw_weight;
173 } else {
174 memcpy(&cos2bw.cfg, &resp->cfg[i - 1], sizeof(cos2bw.cfg));
175 }
176
177 tc = bnxt_queue_to_tc(bp, queue_id: cos2bw.queue_id);
178 if (tc < 0)
179 continue;
180
181 if (cos2bw.tsa ==
182 QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP) {
183 ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_STRICT;
184 } else {
185 ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_ETS;
186 ets->tc_tx_bw[tc] = cos2bw.bw_weight;
187 }
188 }
189 hwrm_req_drop(bp, req);
190 return 0;
191}
192
193static int bnxt_queue_remap(struct bnxt *bp, unsigned int lltc_mask)
194{
195 unsigned long qmap = 0;
196 int max = bp->max_tc;
197 int i, j, rc;
198
199 /* Assign lossless TCs first */
200 for (i = 0, j = 0; i < max; ) {
201 if (lltc_mask & (1 << i)) {
202 if (BNXT_LLQ(bp->q_info[j].queue_profile)) {
203 bp->tc_to_qidx[i] = j;
204 __set_bit(j, &qmap);
205 i++;
206 }
207 j++;
208 continue;
209 }
210 i++;
211 }
212
213 for (i = 0, j = 0; i < max; i++) {
214 if (lltc_mask & (1 << i))
215 continue;
216 j = find_next_zero_bit(addr: &qmap, size: max, offset: j);
217 bp->tc_to_qidx[i] = j;
218 __set_bit(j, &qmap);
219 j++;
220 }
221
222 if (netif_running(dev: bp->dev)) {
223 bnxt_close_nic(bp, false, false);
224 rc = bnxt_open_nic(bp, false, false);
225 if (rc) {
226 netdev_warn(dev: bp->dev, format: "failed to open NIC, rc = %d\n", rc);
227 return rc;
228 }
229 }
230 if (bp->ieee_ets) {
231 int tc = bp->num_tc;
232
233 if (!tc)
234 tc = 1;
235 rc = bnxt_hwrm_queue_cos2bw_cfg(bp, ets: bp->ieee_ets, max_tc: tc);
236 if (rc) {
237 netdev_warn(dev: bp->dev, format: "failed to config BW, rc = %d\n", rc);
238 return rc;
239 }
240 rc = bnxt_hwrm_queue_pri2cos_cfg(bp, ets: bp->ieee_ets);
241 if (rc) {
242 netdev_warn(dev: bp->dev, format: "failed to config prio, rc = %d\n", rc);
243 return rc;
244 }
245 }
246 return 0;
247}
248
249static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
250{
251 struct hwrm_queue_pfcenable_cfg_input *req;
252 struct ieee_ets *my_ets = bp->ieee_ets;
253 unsigned int tc_mask = 0, pri_mask = 0;
254 u8 i, pri, lltc_count = 0;
255 bool need_q_remap = false;
256 int rc;
257
258 if (!my_ets)
259 return -EINVAL;
260
261 for (i = 0; i < bp->max_tc; i++) {
262 for (pri = 0; pri < IEEE_8021QAZ_MAX_TCS; pri++) {
263 if ((pfc->pfc_en & (1 << pri)) &&
264 (my_ets->prio_tc[pri] == i)) {
265 pri_mask |= 1 << pri;
266 tc_mask |= 1 << i;
267 }
268 }
269 if (tc_mask & (1 << i))
270 lltc_count++;
271 }
272 if (lltc_count > bp->max_lltc)
273 return -EINVAL;
274
275 for (i = 0; i < bp->max_tc; i++) {
276 if (tc_mask & (1 << i)) {
277 u8 qidx = bp->tc_to_qidx[i];
278
279 if (!BNXT_LLQ(bp->q_info[qidx].queue_profile)) {
280 need_q_remap = true;
281 break;
282 }
283 }
284 }
285
286 if (need_q_remap)
287 bnxt_queue_remap(bp, lltc_mask: tc_mask);
288
289 rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCENABLE_CFG);
290 if (rc)
291 return rc;
292
293 req->flags = cpu_to_le32(pri_mask);
294 return hwrm_req_send(bp, req);
295}
296
297static int bnxt_hwrm_queue_pfc_qcfg(struct bnxt *bp, struct ieee_pfc *pfc)
298{
299 struct hwrm_queue_pfcenable_qcfg_output *resp;
300 struct hwrm_queue_pfcenable_qcfg_input *req;
301 u8 pri_mask;
302 int rc;
303
304 rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCENABLE_QCFG);
305 if (rc)
306 return rc;
307
308 resp = hwrm_req_hold(bp, req);
309 rc = hwrm_req_send(bp, req);
310 if (rc) {
311 hwrm_req_drop(bp, req);
312 return rc;
313 }
314
315 pri_mask = le32_to_cpu(resp->flags);
316 pfc->pfc_en = pri_mask;
317 hwrm_req_drop(bp, req);
318 return 0;
319}
320
321static int bnxt_hwrm_set_dcbx_app(struct bnxt *bp, struct dcb_app *app,
322 bool add)
323{
324 struct hwrm_fw_set_structured_data_input *set;
325 struct hwrm_fw_get_structured_data_input *get;
326 struct hwrm_struct_data_dcbx_app *fw_app;
327 struct hwrm_struct_hdr *data;
328 dma_addr_t mapping;
329 size_t data_len;
330 int rc, n, i;
331
332 if (bp->hwrm_spec_code < 0x10601)
333 return 0;
334
335 rc = hwrm_req_init(bp, get, HWRM_FW_GET_STRUCTURED_DATA);
336 if (rc)
337 return rc;
338
339 hwrm_req_hold(bp, req: get);
340 hwrm_req_alloc_flags(bp, req: get, GFP_KERNEL | __GFP_ZERO);
341
342 n = IEEE_8021QAZ_MAX_TCS;
343 data_len = sizeof(*data) + sizeof(*fw_app) * n;
344 data = hwrm_req_dma_slice(bp, req: get, size: data_len, dma: &mapping);
345 if (!data) {
346 rc = -ENOMEM;
347 goto set_app_exit;
348 }
349
350 get->dest_data_addr = cpu_to_le64(mapping);
351 get->structure_id = cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP);
352 get->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
353 get->count = 0;
354 rc = hwrm_req_send(bp, req: get);
355 if (rc)
356 goto set_app_exit;
357
358 fw_app = (struct hwrm_struct_data_dcbx_app *)(data + 1);
359
360 if (data->struct_id != cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP)) {
361 rc = -ENODEV;
362 goto set_app_exit;
363 }
364
365 n = data->count;
366 for (i = 0; i < n; i++, fw_app++) {
367 if (fw_app->protocol_id == cpu_to_be16(app->protocol) &&
368 fw_app->protocol_selector == app->selector &&
369 fw_app->priority == app->priority) {
370 if (add)
371 goto set_app_exit;
372 else
373 break;
374 }
375 }
376 if (add) {
377 /* append */
378 n++;
379 fw_app->protocol_id = cpu_to_be16(app->protocol);
380 fw_app->protocol_selector = app->selector;
381 fw_app->priority = app->priority;
382 fw_app->valid = 1;
383 } else {
384 size_t len = 0;
385
386 /* not found, nothing to delete */
387 if (n == i)
388 goto set_app_exit;
389
390 len = (n - 1 - i) * sizeof(*fw_app);
391 if (len)
392 memmove(fw_app, fw_app + 1, len);
393 n--;
394 memset(fw_app + n, 0, sizeof(*fw_app));
395 }
396 data->count = n;
397 data->len = cpu_to_le16(sizeof(*fw_app) * n);
398 data->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
399
400 rc = hwrm_req_init(bp, set, HWRM_FW_SET_STRUCTURED_DATA);
401 if (rc)
402 goto set_app_exit;
403
404 set->src_data_addr = cpu_to_le64(mapping);
405 set->data_len = cpu_to_le16(sizeof(*data) + sizeof(*fw_app) * n);
406 set->hdr_cnt = 1;
407 rc = hwrm_req_send(bp, req: set);
408
409set_app_exit:
410 hwrm_req_drop(bp, req: get); /* dropping get request and associated slice */
411 return rc;
412}
413
414static int bnxt_hwrm_queue_dscp_qcaps(struct bnxt *bp)
415{
416 struct hwrm_queue_dscp_qcaps_output *resp;
417 struct hwrm_queue_dscp_qcaps_input *req;
418 int rc;
419
420 bp->max_dscp_value = 0;
421 if (bp->hwrm_spec_code < 0x10800 || BNXT_VF(bp))
422 return 0;
423
424 rc = hwrm_req_init(bp, req, HWRM_QUEUE_DSCP_QCAPS);
425 if (rc)
426 return rc;
427
428 resp = hwrm_req_hold(bp, req);
429 rc = hwrm_req_send_silent(bp, req);
430 if (!rc) {
431 bp->max_dscp_value = (1 << resp->num_dscp_bits) - 1;
432 if (bp->max_dscp_value < 0x3f)
433 bp->max_dscp_value = 0;
434 }
435 hwrm_req_drop(bp, req);
436 return rc;
437}
438
439static int bnxt_hwrm_queue_dscp2pri_cfg(struct bnxt *bp, struct dcb_app *app,
440 bool add)
441{
442 struct hwrm_queue_dscp2pri_cfg_input *req;
443 struct bnxt_dscp2pri_entry *dscp2pri;
444 dma_addr_t mapping;
445 int rc;
446
447 if (bp->hwrm_spec_code < 0x10800)
448 return 0;
449
450 rc = hwrm_req_init(bp, req, HWRM_QUEUE_DSCP2PRI_CFG);
451 if (rc)
452 return rc;
453
454 dscp2pri = hwrm_req_dma_slice(bp, req, size: sizeof(*dscp2pri), dma: &mapping);
455 if (!dscp2pri) {
456 hwrm_req_drop(bp, req);
457 return -ENOMEM;
458 }
459
460 req->src_data_addr = cpu_to_le64(mapping);
461 dscp2pri->dscp = app->protocol;
462 if (add)
463 dscp2pri->mask = 0x3f;
464 else
465 dscp2pri->mask = 0;
466 dscp2pri->pri = app->priority;
467 req->entry_cnt = cpu_to_le16(1);
468 rc = hwrm_req_send(bp, req);
469 return rc;
470}
471
472static int bnxt_ets_validate(struct bnxt *bp, struct ieee_ets *ets, u8 *tc)
473{
474 int total_ets_bw = 0;
475 bool zero = false;
476 u8 max_tc = 0;
477 int i;
478
479 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
480 if (ets->prio_tc[i] > bp->max_tc) {
481 netdev_err(dev: bp->dev, format: "priority to TC mapping exceeds TC count %d\n",
482 ets->prio_tc[i]);
483 return -EINVAL;
484 }
485 if (ets->prio_tc[i] > max_tc)
486 max_tc = ets->prio_tc[i];
487
488 if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && i > bp->max_tc)
489 return -EINVAL;
490 }
491
492 for (i = 0; i < max_tc; i++) {
493 switch (ets->tc_tsa[i]) {
494 case IEEE_8021QAZ_TSA_STRICT:
495 break;
496 case IEEE_8021QAZ_TSA_ETS:
497 total_ets_bw += ets->tc_tx_bw[i];
498 zero = zero || !ets->tc_tx_bw[i];
499 break;
500 default:
501 return -ENOTSUPP;
502 }
503 }
504 if (total_ets_bw > 100) {
505 netdev_warn(dev: bp->dev, format: "rejecting ETS config exceeding available bandwidth\n");
506 return -EINVAL;
507 }
508 if (zero && total_ets_bw == 100) {
509 netdev_warn(dev: bp->dev, format: "rejecting ETS config starving a TC\n");
510 return -EINVAL;
511 }
512
513 if (max_tc >= bp->max_tc)
514 *tc = bp->max_tc;
515 else
516 *tc = max_tc + 1;
517 return 0;
518}
519
520static int bnxt_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
521{
522 struct bnxt *bp = netdev_priv(dev);
523 struct ieee_ets *my_ets = bp->ieee_ets;
524 int rc;
525
526 ets->ets_cap = bp->max_tc;
527
528 if (!my_ets) {
529 if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
530 return 0;
531
532 my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
533 if (!my_ets)
534 return -ENOMEM;
535 rc = bnxt_hwrm_queue_cos2bw_qcfg(bp, ets: my_ets);
536 if (rc)
537 goto error;
538 rc = bnxt_hwrm_queue_pri2cos_qcfg(bp, ets: my_ets);
539 if (rc)
540 goto error;
541
542 /* cache result */
543 bp->ieee_ets = my_ets;
544 }
545
546 ets->cbs = my_ets->cbs;
547 memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
548 memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
549 memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
550 memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
551 return 0;
552error:
553 kfree(objp: my_ets);
554 return rc;
555}
556
557static int bnxt_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
558{
559 struct bnxt *bp = netdev_priv(dev);
560 struct ieee_ets *my_ets = bp->ieee_ets;
561 u8 max_tc = 0;
562 int rc, i;
563
564 if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
565 !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
566 return -EINVAL;
567
568 rc = bnxt_ets_validate(bp, ets, tc: &max_tc);
569 if (!rc) {
570 if (!my_ets) {
571 my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
572 if (!my_ets)
573 return -ENOMEM;
574 /* initialize PRI2TC mappings to invalid value */
575 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
576 my_ets->prio_tc[i] = IEEE_8021QAZ_MAX_TCS;
577 bp->ieee_ets = my_ets;
578 }
579 rc = bnxt_setup_mq_tc(dev, tc: max_tc);
580 if (rc)
581 return rc;
582 rc = bnxt_hwrm_queue_cos2bw_cfg(bp, ets, max_tc);
583 if (rc)
584 return rc;
585 rc = bnxt_hwrm_queue_pri2cos_cfg(bp, ets);
586 if (rc)
587 return rc;
588 memcpy(my_ets, ets, sizeof(*my_ets));
589 }
590 return rc;
591}
592
593static int bnxt_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
594{
595 struct bnxt *bp = netdev_priv(dev);
596 __le64 *stats = bp->port_stats.hw_stats;
597 struct ieee_pfc *my_pfc = bp->ieee_pfc;
598 long rx_off, tx_off;
599 int i, rc;
600
601 pfc->pfc_cap = bp->max_lltc;
602
603 if (!my_pfc) {
604 if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
605 return 0;
606
607 my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
608 if (!my_pfc)
609 return 0;
610 bp->ieee_pfc = my_pfc;
611 rc = bnxt_hwrm_queue_pfc_qcfg(bp, pfc: my_pfc);
612 if (rc)
613 return 0;
614 }
615
616 pfc->pfc_en = my_pfc->pfc_en;
617 pfc->mbc = my_pfc->mbc;
618 pfc->delay = my_pfc->delay;
619
620 if (!stats)
621 return 0;
622
623 rx_off = BNXT_RX_STATS_OFFSET(rx_pfc_ena_frames_pri0);
624 tx_off = BNXT_TX_STATS_OFFSET(tx_pfc_ena_frames_pri0);
625 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++, rx_off++, tx_off++) {
626 pfc->requests[i] = le64_to_cpu(*(stats + tx_off));
627 pfc->indications[i] = le64_to_cpu(*(stats + rx_off));
628 }
629
630 return 0;
631}
632
633static int bnxt_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
634{
635 struct bnxt *bp = netdev_priv(dev);
636 struct ieee_pfc *my_pfc = bp->ieee_pfc;
637 int rc;
638
639 if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
640 !(bp->dcbx_cap & DCB_CAP_DCBX_HOST) ||
641 (bp->phy_flags & BNXT_PHY_FL_NO_PAUSE))
642 return -EINVAL;
643
644 if (!my_pfc) {
645 my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
646 if (!my_pfc)
647 return -ENOMEM;
648 bp->ieee_pfc = my_pfc;
649 }
650 rc = bnxt_hwrm_queue_pfc_cfg(bp, pfc);
651 if (!rc)
652 memcpy(my_pfc, pfc, sizeof(*my_pfc));
653
654 return rc;
655}
656
657static int bnxt_dcbnl_ieee_dscp_app_prep(struct bnxt *bp, struct dcb_app *app)
658{
659 if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP) {
660 if (!bp->max_dscp_value)
661 return -ENOTSUPP;
662 if (app->protocol > bp->max_dscp_value)
663 return -EINVAL;
664 }
665 return 0;
666}
667
668static int bnxt_dcbnl_ieee_setapp(struct net_device *dev, struct dcb_app *app)
669{
670 struct bnxt *bp = netdev_priv(dev);
671 int rc;
672
673 if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
674 !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
675 return -EINVAL;
676
677 rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
678 if (rc)
679 return rc;
680
681 rc = dcb_ieee_setapp(dev, app);
682 if (rc)
683 return rc;
684
685 if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
686 app->protocol == ETH_P_IBOE) ||
687 (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
688 app->protocol == ROCE_V2_UDP_DPORT))
689 rc = bnxt_hwrm_set_dcbx_app(bp, app, add: true);
690
691 if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
692 rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, add: true);
693
694 return rc;
695}
696
697static int bnxt_dcbnl_ieee_delapp(struct net_device *dev, struct dcb_app *app)
698{
699 struct bnxt *bp = netdev_priv(dev);
700 int rc;
701
702 if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
703 !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
704 return -EINVAL;
705
706 rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
707 if (rc)
708 return rc;
709
710 rc = dcb_ieee_delapp(dev, app);
711 if (rc)
712 return rc;
713 if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
714 app->protocol == ETH_P_IBOE) ||
715 (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
716 app->protocol == ROCE_V2_UDP_DPORT))
717 rc = bnxt_hwrm_set_dcbx_app(bp, app, add: false);
718
719 if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
720 rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, add: false);
721
722 return rc;
723}
724
725static u8 bnxt_dcbnl_getdcbx(struct net_device *dev)
726{
727 struct bnxt *bp = netdev_priv(dev);
728
729 return bp->dcbx_cap;
730}
731
732static u8 bnxt_dcbnl_setdcbx(struct net_device *dev, u8 mode)
733{
734 struct bnxt *bp = netdev_priv(dev);
735
736 /* All firmware DCBX settings are set in NVRAM */
737 if (bp->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
738 return 1;
739
740 if (mode & DCB_CAP_DCBX_HOST) {
741 if (BNXT_VF(bp) || (bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
742 return 1;
743
744 /* only support IEEE */
745 if ((mode & DCB_CAP_DCBX_VER_CEE) ||
746 !(mode & DCB_CAP_DCBX_VER_IEEE))
747 return 1;
748 }
749
750 if (mode == bp->dcbx_cap)
751 return 0;
752
753 bp->dcbx_cap = mode;
754 return 0;
755}
756
757static const struct dcbnl_rtnl_ops dcbnl_ops = {
758 .ieee_getets = bnxt_dcbnl_ieee_getets,
759 .ieee_setets = bnxt_dcbnl_ieee_setets,
760 .ieee_getpfc = bnxt_dcbnl_ieee_getpfc,
761 .ieee_setpfc = bnxt_dcbnl_ieee_setpfc,
762 .ieee_setapp = bnxt_dcbnl_ieee_setapp,
763 .ieee_delapp = bnxt_dcbnl_ieee_delapp,
764 .getdcbx = bnxt_dcbnl_getdcbx,
765 .setdcbx = bnxt_dcbnl_setdcbx,
766};
767
768void bnxt_dcb_init(struct bnxt *bp)
769{
770 bp->dcbx_cap = 0;
771 if (bp->hwrm_spec_code < 0x10501)
772 return;
773
774 bnxt_hwrm_queue_dscp_qcaps(bp);
775 bp->dcbx_cap = DCB_CAP_DCBX_VER_IEEE;
776 if (BNXT_PF(bp) && !(bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
777 bp->dcbx_cap |= DCB_CAP_DCBX_HOST;
778 else if (bp->fw_cap & BNXT_FW_CAP_DCBX_AGENT)
779 bp->dcbx_cap |= DCB_CAP_DCBX_LLD_MANAGED;
780 bp->dev->dcbnl_ops = &dcbnl_ops;
781}
782
783void bnxt_dcb_free(struct bnxt *bp)
784{
785 kfree(objp: bp->ieee_pfc);
786 kfree(objp: bp->ieee_ets);
787 bp->ieee_pfc = NULL;
788 bp->ieee_ets = NULL;
789}
790
791#else
792
793void bnxt_dcb_init(struct bnxt *bp)
794{
795}
796
797void bnxt_dcb_free(struct bnxt *bp)
798{
799}
800
801#endif
802

source code of linux/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c