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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2021 Intel Corporation. */
3
4#ifdef CONFIG_I40E_DCB
5#include <net/dcbnl.h>
6#include "i40e.h"
7
8#define I40E_DCBNL_STATUS_SUCCESS 0
9#define I40E_DCBNL_STATUS_ERROR 1
10static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
11 struct i40e_dcb_app_priority_table *app);
12/**
13 * i40e_get_pfc_delay - retrieve PFC Link Delay
14 * @hw: pointer to hardware struct
15 * @delay: holds the PFC Link delay value
16 *
17 * Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA
18 **/
19static void i40e_get_pfc_delay(struct i40e_hw *hw, u16 *delay)
20{
21 u32 val;
22
23 val = rd32(hw, I40E_PRTDCB_GENC);
24 *delay = FIELD_GET(I40E_PRTDCB_GENC_PFCLDA_MASK, val);
25}
26
27/**
28 * i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration
29 * @dev: the corresponding netdev
30 * @ets: structure to hold the ETS information
31 *
32 * Returns local IEEE ETS configuration
33 **/
34static int i40e_dcbnl_ieee_getets(struct net_device *dev,
35 struct ieee_ets *ets)
36{
37 struct i40e_pf *pf = i40e_netdev_to_pf(dev);
38 struct i40e_dcbx_config *dcbxcfg;
39
40 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
41 return -EINVAL;
42
43 dcbxcfg = &pf->hw.local_dcbx_config;
44 ets->willing = dcbxcfg->etscfg.willing;
45 ets->ets_cap = I40E_MAX_TRAFFIC_CLASS;
46 ets->cbs = dcbxcfg->etscfg.cbs;
47 memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable,
48 sizeof(ets->tc_tx_bw));
49 memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable,
50 sizeof(ets->tc_rx_bw));
51 memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable,
52 sizeof(ets->tc_tsa));
53 memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable,
54 sizeof(ets->prio_tc));
55 memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable,
56 sizeof(ets->tc_reco_bw));
57 memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable,
58 sizeof(ets->tc_reco_tsa));
59 memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable,
60 sizeof(ets->reco_prio_tc));
61
62 return 0;
63}
64
65/**
66 * i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration
67 * @dev: the corresponding netdev
68 * @pfc: structure to hold the PFC information
69 *
70 * Returns local IEEE PFC configuration
71 **/
72static int i40e_dcbnl_ieee_getpfc(struct net_device *dev,
73 struct ieee_pfc *pfc)
74{
75 struct i40e_pf *pf = i40e_netdev_to_pf(dev);
76 struct i40e_dcbx_config *dcbxcfg;
77 struct i40e_hw *hw = &pf->hw;
78 int i;
79
80 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
81 return -EINVAL;
82
83 dcbxcfg = &hw->local_dcbx_config;
84 pfc->pfc_cap = dcbxcfg->pfc.pfccap;
85 pfc->pfc_en = dcbxcfg->pfc.pfcenable;
86 pfc->mbc = dcbxcfg->pfc.mbc;
87 i40e_get_pfc_delay(hw, &pfc->delay);
88
89 /* Get Requests/Indications */
90 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
91 pfc->requests[i] = pf->stats.priority_xoff_tx[i];
92 pfc->indications[i] = pf->stats.priority_xoff_rx[i];
93 }
94
95 return 0;
96}
97
98/**
99 * i40e_dcbnl_ieee_setets - set IEEE ETS configuration
100 * @netdev: the corresponding netdev
101 * @ets: structure to hold the ETS information
102 *
103 * Set IEEE ETS configuration
104 **/
105static int i40e_dcbnl_ieee_setets(struct net_device *netdev,
106 struct ieee_ets *ets)
107{
108 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
109 struct i40e_dcbx_config *old_cfg;
110 int i, ret;
111
112 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
113 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
114 return -EINVAL;
115
116 old_cfg = &pf->hw.local_dcbx_config;
117 /* Copy current config into temp */
118 pf->tmp_cfg = *old_cfg;
119
120 /* Update the ETS configuration for temp */
121 pf->tmp_cfg.etscfg.willing = ets->willing;
122 pf->tmp_cfg.etscfg.maxtcs = I40E_MAX_TRAFFIC_CLASS;
123 pf->tmp_cfg.etscfg.cbs = ets->cbs;
124 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
125 pf->tmp_cfg.etscfg.tcbwtable[i] = ets->tc_tx_bw[i];
126 pf->tmp_cfg.etscfg.tsatable[i] = ets->tc_tsa[i];
127 pf->tmp_cfg.etscfg.prioritytable[i] = ets->prio_tc[i];
128 pf->tmp_cfg.etsrec.tcbwtable[i] = ets->tc_reco_bw[i];
129 pf->tmp_cfg.etsrec.tsatable[i] = ets->tc_reco_tsa[i];
130 pf->tmp_cfg.etsrec.prioritytable[i] = ets->reco_prio_tc[i];
131 }
132
133 /* Commit changes to HW */
134 ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
135 if (ret) {
136 dev_info(&pf->pdev->dev,
137 "Failed setting DCB ETS configuration err %pe aq_err %s\n",
138 ERR_PTR(ret),
139 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
140 return -EINVAL;
141 }
142
143 return 0;
144}
145
146/**
147 * i40e_dcbnl_ieee_setpfc - set local IEEE PFC configuration
148 * @netdev: the corresponding netdev
149 * @pfc: structure to hold the PFC information
150 *
151 * Sets local IEEE PFC configuration
152 **/
153static int i40e_dcbnl_ieee_setpfc(struct net_device *netdev,
154 struct ieee_pfc *pfc)
155{
156 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
157 struct i40e_dcbx_config *old_cfg;
158 int ret;
159
160 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
161 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
162 return -EINVAL;
163
164 old_cfg = &pf->hw.local_dcbx_config;
165 /* Copy current config into temp */
166 pf->tmp_cfg = *old_cfg;
167 if (pfc->pfc_cap)
168 pf->tmp_cfg.pfc.pfccap = pfc->pfc_cap;
169 else
170 pf->tmp_cfg.pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
171 pf->tmp_cfg.pfc.pfcenable = pfc->pfc_en;
172
173 ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
174 if (ret) {
175 dev_info(&pf->pdev->dev,
176 "Failed setting DCB PFC configuration err %pe aq_err %s\n",
177 ERR_PTR(ret),
178 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
179 return -EINVAL;
180 }
181
182 return 0;
183}
184
185/**
186 * i40e_dcbnl_ieee_setapp - set local IEEE App configuration
187 * @netdev: the corresponding netdev
188 * @app: structure to hold the Application information
189 *
190 * Sets local IEEE App configuration
191 **/
192static int i40e_dcbnl_ieee_setapp(struct net_device *netdev,
193 struct dcb_app *app)
194{
195 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
196 struct i40e_dcb_app_priority_table new_app;
197 struct i40e_dcbx_config *old_cfg;
198 int ret;
199
200 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
201 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
202 return -EINVAL;
203
204 old_cfg = &pf->hw.local_dcbx_config;
205 if (old_cfg->numapps == I40E_DCBX_MAX_APPS)
206 return -EINVAL;
207
208 ret = dcb_ieee_setapp(netdev, app);
209 if (ret)
210 return ret;
211
212 new_app.selector = app->selector;
213 new_app.protocolid = app->protocol;
214 new_app.priority = app->priority;
215 /* Already internally available */
216 if (i40e_dcbnl_find_app(old_cfg, &new_app))
217 return 0;
218
219 /* Copy current config into temp */
220 pf->tmp_cfg = *old_cfg;
221 /* Add the app */
222 pf->tmp_cfg.app[pf->tmp_cfg.numapps++] = new_app;
223
224 ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
225 if (ret) {
226 dev_info(&pf->pdev->dev,
227 "Failed setting DCB configuration err %pe aq_err %s\n",
228 ERR_PTR(ret),
229 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
230 return -EINVAL;
231 }
232
233 return 0;
234}
235
236/**
237 * i40e_dcbnl_ieee_delapp - delete local IEEE App configuration
238 * @netdev: the corresponding netdev
239 * @app: structure to hold the Application information
240 *
241 * Deletes local IEEE App configuration other than the first application
242 * required by firmware
243 **/
244static int i40e_dcbnl_ieee_delapp(struct net_device *netdev,
245 struct dcb_app *app)
246{
247 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
248 struct i40e_dcbx_config *old_cfg;
249 int i, j, ret;
250
251 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
252 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
253 return -EINVAL;
254
255 ret = dcb_ieee_delapp(netdev, app);
256 if (ret)
257 return ret;
258
259 old_cfg = &pf->hw.local_dcbx_config;
260 /* Need one app for FW so keep it */
261 if (old_cfg->numapps == 1)
262 return 0;
263
264 /* Copy current config into temp */
265 pf->tmp_cfg = *old_cfg;
266
267 /* Find and reset the app */
268 for (i = 1; i < pf->tmp_cfg.numapps; i++) {
269 if (app->selector == pf->tmp_cfg.app[i].selector &&
270 app->protocol == pf->tmp_cfg.app[i].protocolid &&
271 app->priority == pf->tmp_cfg.app[i].priority) {
272 /* Reset the app data */
273 pf->tmp_cfg.app[i].selector = 0;
274 pf->tmp_cfg.app[i].protocolid = 0;
275 pf->tmp_cfg.app[i].priority = 0;
276 break;
277 }
278 }
279
280 /* If the specific DCB app not found */
281 if (i == pf->tmp_cfg.numapps)
282 return -EINVAL;
283
284 pf->tmp_cfg.numapps--;
285 /* Overwrite the tmp_cfg app */
286 for (j = i; j < pf->tmp_cfg.numapps; j++)
287 pf->tmp_cfg.app[j] = old_cfg->app[j + 1];
288
289 ret = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
290 if (ret) {
291 dev_info(&pf->pdev->dev,
292 "Failed setting DCB configuration err %pe aq_err %s\n",
293 ERR_PTR(ret),
294 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
295 return -EINVAL;
296 }
297
298 return 0;
299}
300
301/**
302 * i40e_dcbnl_getstate - Get DCB enabled state
303 * @netdev: the corresponding netdev
304 *
305 * Get the current DCB enabled state
306 **/
307static u8 i40e_dcbnl_getstate(struct net_device *netdev)
308{
309 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
310
311 dev_dbg(&pf->pdev->dev, "DCB state=%d\n",
312 test_bit(I40E_FLAG_DCB_ENA, pf->flags) ? 1 : 0);
313 return test_bit(I40E_FLAG_DCB_ENA, pf->flags) ? 1 : 0;
314}
315
316/**
317 * i40e_dcbnl_setstate - Set DCB state
318 * @netdev: the corresponding netdev
319 * @state: enable or disable
320 *
321 * Set the DCB state
322 **/
323static u8 i40e_dcbnl_setstate(struct net_device *netdev, u8 state)
324{
325 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
326 int ret = I40E_DCBNL_STATUS_SUCCESS;
327
328 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
329 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
330 return ret;
331
332 dev_dbg(&pf->pdev->dev, "new state=%d current state=%d\n",
333 state, test_bit(I40E_FLAG_DCB_ENA, pf->flags) ? 1 : 0);
334 /* Nothing to do */
335 if (!state == !test_bit(I40E_FLAG_DCB_ENA, pf->flags))
336 return ret;
337
338 if (i40e_is_sw_dcb(pf)) {
339 if (state) {
340 set_bit(I40E_FLAG_DCB_ENA, pf->flags);
341 memcpy(&pf->hw.desired_dcbx_config,
342 &pf->hw.local_dcbx_config,
343 sizeof(struct i40e_dcbx_config));
344 } else {
345 clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
346 }
347 } else {
348 /* Cannot directly manipulate FW LLDP Agent */
349 ret = I40E_DCBNL_STATUS_ERROR;
350 }
351 return ret;
352}
353
354/**
355 * i40e_dcbnl_set_pg_tc_cfg_tx - Set CEE PG Tx config
356 * @netdev: the corresponding netdev
357 * @tc: the corresponding traffic class
358 * @prio_type: the traffic priority type
359 * @bwg_id: the BW group id the traffic class belongs to
360 * @bw_pct: the BW percentage for the corresponding BWG
361 * @up_map: prio mapped to corresponding tc
362 *
363 * Set Tx PG settings for CEE mode
364 **/
365static void i40e_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
366 u8 prio_type, u8 bwg_id, u8 bw_pct,
367 u8 up_map)
368{
369 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
370 int i;
371
372 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
373 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
374 return;
375
376 /* LLTC not supported yet */
377 if (tc >= I40E_MAX_TRAFFIC_CLASS)
378 return;
379
380 /* prio_type, bwg_id and bw_pct per UP are not supported */
381
382 /* Use only up_map to map tc */
383 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
384 if (up_map & BIT(i))
385 pf->tmp_cfg.etscfg.prioritytable[i] = tc;
386 }
387 pf->tmp_cfg.etscfg.tsatable[tc] = I40E_IEEE_TSA_ETS;
388 dev_dbg(&pf->pdev->dev,
389 "Set PG config tc=%d bwg_id=%d prio_type=%d bw_pct=%d up_map=%d\n",
390 tc, bwg_id, prio_type, bw_pct, up_map);
391}
392
393/**
394 * i40e_dcbnl_set_pg_bwg_cfg_tx - Set CEE PG Tx BW config
395 * @netdev: the corresponding netdev
396 * @pgid: the corresponding traffic class
397 * @bw_pct: the BW percentage for the specified traffic class
398 *
399 * Set Tx BW settings for CEE mode
400 **/
401static void i40e_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int pgid,
402 u8 bw_pct)
403{
404 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
405
406 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
407 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
408 return;
409
410 /* LLTC not supported yet */
411 if (pgid >= I40E_MAX_TRAFFIC_CLASS)
412 return;
413
414 pf->tmp_cfg.etscfg.tcbwtable[pgid] = bw_pct;
415 dev_dbg(&pf->pdev->dev, "Set PG BW config tc=%d bw_pct=%d\n",
416 pgid, bw_pct);
417}
418
419/**
420 * i40e_dcbnl_set_pg_tc_cfg_rx - Set CEE PG Rx config
421 * @netdev: the corresponding netdev
422 * @prio: the corresponding traffic class
423 * @prio_type: the traffic priority type
424 * @pgid: the BW group id the traffic class belongs to
425 * @bw_pct: the BW percentage for the corresponding BWG
426 * @up_map: prio mapped to corresponding tc
427 *
428 * Set Rx BW settings for CEE mode. The hardware does not support this
429 * so we won't allow setting of this parameter.
430 **/
431static void i40e_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev,
432 int __always_unused prio,
433 u8 __always_unused prio_type,
434 u8 __always_unused pgid,
435 u8 __always_unused bw_pct,
436 u8 __always_unused up_map)
437{
438 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
439
440 dev_dbg(&pf->pdev->dev, "Rx TC PG Config Not Supported.\n");
441}
442
443/**
444 * i40e_dcbnl_set_pg_bwg_cfg_rx - Set CEE PG Rx config
445 * @netdev: the corresponding netdev
446 * @pgid: the corresponding traffic class
447 * @bw_pct: the BW percentage for the specified traffic class
448 *
449 * Set Rx BW settings for CEE mode. The hardware does not support this
450 * so we won't allow setting of this parameter.
451 **/
452static void i40e_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int pgid,
453 u8 bw_pct)
454{
455 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
456
457 dev_dbg(&pf->pdev->dev, "Rx BWG PG Config Not Supported.\n");
458}
459
460/**
461 * i40e_dcbnl_get_pg_tc_cfg_tx - Get CEE PG Tx config
462 * @netdev: the corresponding netdev
463 * @prio: the corresponding user priority
464 * @prio_type: traffic priority type
465 * @pgid: the BW group ID the traffic class belongs to
466 * @bw_pct: BW percentage for the corresponding BWG
467 * @up_map: prio mapped to corresponding TC
468 *
469 * Get Tx PG settings for CEE mode
470 **/
471static void i40e_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int prio,
472 u8 __always_unused *prio_type,
473 u8 *pgid,
474 u8 __always_unused *bw_pct,
475 u8 __always_unused *up_map)
476{
477 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
478
479 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
480 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
481 return;
482
483 if (prio >= I40E_MAX_USER_PRIORITY)
484 return;
485
486 *pgid = pf->hw.local_dcbx_config.etscfg.prioritytable[prio];
487 dev_dbg(&pf->pdev->dev, "Get PG config prio=%d tc=%d\n",
488 prio, *pgid);
489}
490
491/**
492 * i40e_dcbnl_get_pg_bwg_cfg_tx - Get CEE PG BW config
493 * @netdev: the corresponding netdev
494 * @pgid: the corresponding traffic class
495 * @bw_pct: the BW percentage for the corresponding TC
496 *
497 * Get Tx BW settings for given TC in CEE mode
498 **/
499static void i40e_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int pgid,
500 u8 *bw_pct)
501{
502 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
503
504 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
505 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
506 return;
507
508 if (pgid >= I40E_MAX_TRAFFIC_CLASS)
509 return;
510
511 *bw_pct = pf->hw.local_dcbx_config.etscfg.tcbwtable[pgid];
512 dev_dbg(&pf->pdev->dev, "Get PG BW config tc=%d bw_pct=%d\n",
513 pgid, *bw_pct);
514}
515
516/**
517 * i40e_dcbnl_get_pg_tc_cfg_rx - Get CEE PG Rx config
518 * @netdev: the corresponding netdev
519 * @prio: the corresponding user priority
520 * @prio_type: the traffic priority type
521 * @pgid: the PG ID
522 * @bw_pct: the BW percentage for the corresponding BWG
523 * @up_map: prio mapped to corresponding TC
524 *
525 * Get Rx PG settings for CEE mode. The UP2TC map is applied in same
526 * manner for Tx and Rx (symmetrical) so return the TC information for
527 * given priority accordingly.
528 **/
529static void i40e_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int prio,
530 u8 *prio_type, u8 *pgid, u8 *bw_pct,
531 u8 *up_map)
532{
533 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
534
535 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
536 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
537 return;
538
539 if (prio >= I40E_MAX_USER_PRIORITY)
540 return;
541
542 *pgid = pf->hw.local_dcbx_config.etscfg.prioritytable[prio];
543}
544
545/**
546 * i40e_dcbnl_get_pg_bwg_cfg_rx - Get CEE PG BW Rx config
547 * @netdev: the corresponding netdev
548 * @pgid: the corresponding traffic class
549 * @bw_pct: the BW percentage for the corresponding TC
550 *
551 * Get Rx BW settings for given TC in CEE mode
552 * The adapter doesn't support Rx ETS and runs in strict priority
553 * mode in Rx path and hence just return 0.
554 **/
555static void i40e_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int pgid,
556 u8 *bw_pct)
557{
558 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
559
560 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
561 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
562 return;
563 *bw_pct = 0;
564}
565
566/**
567 * i40e_dcbnl_set_pfc_cfg - Set CEE PFC configuration
568 * @netdev: the corresponding netdev
569 * @prio: the corresponding user priority
570 * @setting: the PFC setting for given priority
571 *
572 * Set the PFC enabled/disabled setting for given user priority
573 **/
574static void i40e_dcbnl_set_pfc_cfg(struct net_device *netdev, int prio,
575 u8 setting)
576{
577 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
578
579 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
580 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
581 return;
582
583 if (prio >= I40E_MAX_USER_PRIORITY)
584 return;
585
586 pf->tmp_cfg.pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
587 if (setting)
588 pf->tmp_cfg.pfc.pfcenable |= BIT(prio);
589 else
590 pf->tmp_cfg.pfc.pfcenable &= ~BIT(prio);
591 dev_dbg(&pf->pdev->dev,
592 "Set PFC Config up=%d setting=%d pfcenable=0x%x\n",
593 prio, setting, pf->tmp_cfg.pfc.pfcenable);
594}
595
596/**
597 * i40e_dcbnl_get_pfc_cfg - Get CEE PFC configuration
598 * @netdev: the corresponding netdev
599 * @prio: the corresponding user priority
600 * @setting: the PFC setting for given priority
601 *
602 * Get the PFC enabled/disabled setting for given user priority
603 **/
604static void i40e_dcbnl_get_pfc_cfg(struct net_device *netdev, int prio,
605 u8 *setting)
606{
607 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
608
609 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
610 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
611 return;
612
613 if (prio >= I40E_MAX_USER_PRIORITY)
614 return;
615
616 *setting = (pf->hw.local_dcbx_config.pfc.pfcenable >> prio) & 0x1;
617 dev_dbg(&pf->pdev->dev,
618 "Get PFC Config up=%d setting=%d pfcenable=0x%x\n",
619 prio, *setting, pf->hw.local_dcbx_config.pfc.pfcenable);
620}
621
622/**
623 * i40e_dcbnl_cee_set_all - Commit CEE DCB settings to hardware
624 * @netdev: the corresponding netdev
625 *
626 * Commit the current DCB configuration to hardware
627 **/
628static u8 i40e_dcbnl_cee_set_all(struct net_device *netdev)
629{
630 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
631 int err;
632
633 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
634 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
635 return I40E_DCBNL_STATUS_ERROR;
636
637 dev_dbg(&pf->pdev->dev, "Commit DCB Configuration to the hardware\n");
638 err = i40e_hw_dcb_config(pf, &pf->tmp_cfg);
639
640 return err ? I40E_DCBNL_STATUS_ERROR : I40E_DCBNL_STATUS_SUCCESS;
641}
642
643/**
644 * i40e_dcbnl_get_cap - Get DCBX capabilities of adapter
645 * @netdev: the corresponding netdev
646 * @capid: the capability type
647 * @cap: the capability value
648 *
649 * Return the capability value for a given capability type
650 **/
651static u8 i40e_dcbnl_get_cap(struct net_device *netdev, int capid, u8 *cap)
652{
653 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
654
655 if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
656 return I40E_DCBNL_STATUS_ERROR;
657
658 switch (capid) {
659 case DCB_CAP_ATTR_PG:
660 case DCB_CAP_ATTR_PFC:
661 *cap = true;
662 break;
663 case DCB_CAP_ATTR_PG_TCS:
664 case DCB_CAP_ATTR_PFC_TCS:
665 *cap = 0x80;
666 break;
667 case DCB_CAP_ATTR_DCBX:
668 *cap = pf->dcbx_cap;
669 break;
670 case DCB_CAP_ATTR_UP2TC:
671 case DCB_CAP_ATTR_GSP:
672 case DCB_CAP_ATTR_BCN:
673 default:
674 *cap = false;
675 break;
676 }
677
678 dev_dbg(&pf->pdev->dev, "Get Capability cap=%d capval=0x%x\n",
679 capid, *cap);
680 return I40E_DCBNL_STATUS_SUCCESS;
681}
682
683/**
684 * i40e_dcbnl_getnumtcs - Get max number of traffic classes supported
685 * @netdev: the corresponding netdev
686 * @tcid: the TC id
687 * @num: total number of TCs supported by the device
688 *
689 * Return the total number of TCs supported by the adapter
690 **/
691static int i40e_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
692{
693 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
694
695 if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
696 return -EINVAL;
697
698 *num = I40E_MAX_TRAFFIC_CLASS;
699 return 0;
700}
701
702/**
703 * i40e_dcbnl_setnumtcs - Set CEE number of traffic classes
704 * @netdev: the corresponding netdev
705 * @tcid: the TC id
706 * @num: total number of TCs
707 *
708 * Set the total number of TCs (Unsupported)
709 **/
710static int i40e_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
711{
712 return -EINVAL;
713}
714
715/**
716 * i40e_dcbnl_getpfcstate - Get CEE PFC mode
717 * @netdev: the corresponding netdev
718 *
719 * Get the current PFC enabled state
720 **/
721static u8 i40e_dcbnl_getpfcstate(struct net_device *netdev)
722{
723 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
724
725 /* Return enabled if any PFC enabled UP */
726 if (pf->hw.local_dcbx_config.pfc.pfcenable)
727 return 1;
728 else
729 return 0;
730}
731
732/**
733 * i40e_dcbnl_setpfcstate - Set CEE PFC mode
734 * @netdev: the corresponding netdev
735 * @state: required state
736 *
737 * The PFC state to be set; this is enabled/disabled based on the PFC
738 * priority settings and not via this call for i40e driver
739 **/
740static void i40e_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
741{
742 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
743
744 dev_dbg(&pf->pdev->dev, "PFC State is modified via PFC config.\n");
745}
746
747/**
748 * i40e_dcbnl_getapp - Get CEE APP
749 * @netdev: the corresponding netdev
750 * @idtype: the App selector
751 * @id: the App ethtype or port number
752 *
753 * Return the CEE mode app for the given idtype and id
754 **/
755static int i40e_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
756{
757 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
758 struct dcb_app app = {
759 .selector = idtype,
760 .protocol = id,
761 };
762
763 if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE) ||
764 (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED))
765 return -EINVAL;
766
767 return dcb_getapp(netdev, &app);
768}
769
770/**
771 * i40e_dcbnl_setdcbx - set required DCBx capability
772 * @netdev: the corresponding netdev
773 * @mode: new DCB mode managed or CEE+IEEE
774 *
775 * Set DCBx capability features
776 **/
777static u8 i40e_dcbnl_setdcbx(struct net_device *netdev, u8 mode)
778{
779 struct i40e_pf *pf = i40e_netdev_to_pf(netdev);
780
781 /* Do not allow to set mode if managed by Firmware */
782 if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
783 return I40E_DCBNL_STATUS_ERROR;
784
785 /* No support for LLD_MANAGED modes or CEE+IEEE */
786 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
787 ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
788 !(mode & DCB_CAP_DCBX_HOST))
789 return I40E_DCBNL_STATUS_ERROR;
790
791 /* Already set to the given mode no change */
792 if (mode == pf->dcbx_cap)
793 return I40E_DCBNL_STATUS_SUCCESS;
794
795 pf->dcbx_cap = mode;
796 if (mode & DCB_CAP_DCBX_VER_CEE)
797 pf->hw.local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_CEE;
798 else
799 pf->hw.local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_IEEE;
800
801 dev_dbg(&pf->pdev->dev, "mode=%d\n", mode);
802 return I40E_DCBNL_STATUS_SUCCESS;
803}
804
805/**
806 * i40e_dcbnl_getdcbx - retrieve current DCBx capability
807 * @dev: the corresponding netdev
808 *
809 * Returns DCBx capability features
810 **/
811static u8 i40e_dcbnl_getdcbx(struct net_device *dev)
812{
813 struct i40e_pf *pf = i40e_netdev_to_pf(dev);
814
815 return pf->dcbx_cap;
816}
817
818/**
819 * i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx
820 * @dev: the corresponding netdev
821 * @perm_addr: buffer to store the MAC address
822 *
823 * Returns the SAN MAC address used for LLDP exchange
824 **/
825static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev,
826 u8 *perm_addr)
827{
828 struct i40e_pf *pf = i40e_netdev_to_pf(dev);
829 int i;
830
831 memset(perm_addr, 0xff, MAX_ADDR_LEN);
832
833 for (i = 0; i < dev->addr_len; i++)
834 perm_addr[i] = pf->hw.mac.perm_addr[i];
835}
836
837static const struct dcbnl_rtnl_ops dcbnl_ops = {
838 .ieee_getets = i40e_dcbnl_ieee_getets,
839 .ieee_getpfc = i40e_dcbnl_ieee_getpfc,
840 .getdcbx = i40e_dcbnl_getdcbx,
841 .getpermhwaddr = i40e_dcbnl_get_perm_hw_addr,
842 .ieee_setets = i40e_dcbnl_ieee_setets,
843 .ieee_setpfc = i40e_dcbnl_ieee_setpfc,
844 .ieee_setapp = i40e_dcbnl_ieee_setapp,
845 .ieee_delapp = i40e_dcbnl_ieee_delapp,
846 .getstate = i40e_dcbnl_getstate,
847 .setstate = i40e_dcbnl_setstate,
848 .setpgtccfgtx = i40e_dcbnl_set_pg_tc_cfg_tx,
849 .setpgbwgcfgtx = i40e_dcbnl_set_pg_bwg_cfg_tx,
850 .setpgtccfgrx = i40e_dcbnl_set_pg_tc_cfg_rx,
851 .setpgbwgcfgrx = i40e_dcbnl_set_pg_bwg_cfg_rx,
852 .getpgtccfgtx = i40e_dcbnl_get_pg_tc_cfg_tx,
853 .getpgbwgcfgtx = i40e_dcbnl_get_pg_bwg_cfg_tx,
854 .getpgtccfgrx = i40e_dcbnl_get_pg_tc_cfg_rx,
855 .getpgbwgcfgrx = i40e_dcbnl_get_pg_bwg_cfg_rx,
856 .setpfccfg = i40e_dcbnl_set_pfc_cfg,
857 .getpfccfg = i40e_dcbnl_get_pfc_cfg,
858 .setall = i40e_dcbnl_cee_set_all,
859 .getcap = i40e_dcbnl_get_cap,
860 .getnumtcs = i40e_dcbnl_getnumtcs,
861 .setnumtcs = i40e_dcbnl_setnumtcs,
862 .getpfcstate = i40e_dcbnl_getpfcstate,
863 .setpfcstate = i40e_dcbnl_setpfcstate,
864 .getapp = i40e_dcbnl_getapp,
865 .setdcbx = i40e_dcbnl_setdcbx,
866};
867
868/**
869 * i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config
870 * @vsi: the corresponding vsi
871 *
872 * Set up all the IEEE APPs in the DCBNL App Table and generate event for
873 * other settings
874 **/
875void i40e_dcbnl_set_all(struct i40e_vsi *vsi)
876{
877 struct net_device *dev = vsi->netdev;
878 struct i40e_pf *pf = i40e_netdev_to_pf(dev);
879 struct i40e_dcbx_config *dcbxcfg;
880 struct i40e_hw *hw = &pf->hw;
881 struct dcb_app sapp;
882 u8 prio, tc_map;
883 int i;
884
885 /* SW DCB taken care by DCBNL set calls */
886 if (pf->dcbx_cap & DCB_CAP_DCBX_HOST)
887 return;
888
889 /* DCB not enabled */
890 if (!test_bit(I40E_FLAG_DCB_ENA, pf->flags))
891 return;
892
893 /* MFP mode but not an iSCSI PF so return */
894 if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) && !(hw->func_caps.iscsi))
895 return;
896
897 dcbxcfg = &hw->local_dcbx_config;
898
899 /* Set up all the App TLVs if DCBx is negotiated */
900 for (i = 0; i < dcbxcfg->numapps; i++) {
901 prio = dcbxcfg->app[i].priority;
902 tc_map = BIT(dcbxcfg->etscfg.prioritytable[prio]);
903
904 /* Add APP only if the TC is enabled for this VSI */
905 if (tc_map & vsi->tc_config.enabled_tc) {
906 sapp.selector = dcbxcfg->app[i].selector;
907 sapp.protocol = dcbxcfg->app[i].protocolid;
908 sapp.priority = prio;
909 dcb_ieee_setapp(dev, &sapp);
910 }
911 }
912
913 /* Notify user-space of the changes */
914 dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
915}
916
917/**
918 * i40e_dcbnl_vsi_del_app - Delete APP for given VSI
919 * @vsi: the corresponding vsi
920 * @app: APP to delete
921 *
922 * Delete given APP from the DCBNL APP table for given
923 * VSI
924 **/
925static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi,
926 struct i40e_dcb_app_priority_table *app)
927{
928 struct net_device *dev = vsi->netdev;
929 struct dcb_app sapp;
930
931 if (!dev)
932 return -EINVAL;
933
934 sapp.selector = app->selector;
935 sapp.protocol = app->protocolid;
936 sapp.priority = app->priority;
937 return dcb_ieee_delapp(dev, &sapp);
938}
939
940/**
941 * i40e_dcbnl_del_app - Delete APP on all VSIs
942 * @pf: the corresponding PF
943 * @app: APP to delete
944 *
945 * Delete given APP from all the VSIs for given PF
946 **/
947static void i40e_dcbnl_del_app(struct i40e_pf *pf,
948 struct i40e_dcb_app_priority_table *app)
949{
950 int v, err;
951
952 for (v = 0; v < pf->num_alloc_vsi; v++) {
953 if (pf->vsi[v] && pf->vsi[v]->netdev) {
954 err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app);
955 dev_dbg(&pf->pdev->dev, "Deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
956 pf->vsi[v]->seid, err, app->selector,
957 app->protocolid, app->priority);
958 }
959 }
960}
961
962/**
963 * i40e_dcbnl_find_app - Search APP in given DCB config
964 * @cfg: DCBX configuration data
965 * @app: APP to search for
966 *
967 * Find given APP in the DCB configuration
968 **/
969static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
970 struct i40e_dcb_app_priority_table *app)
971{
972 int i;
973
974 for (i = 0; i < cfg->numapps; i++) {
975 if (app->selector == cfg->app[i].selector &&
976 app->protocolid == cfg->app[i].protocolid &&
977 app->priority == cfg->app[i].priority)
978 return true;
979 }
980
981 return false;
982}
983
984/**
985 * i40e_dcbnl_flush_apps - Delete all removed APPs
986 * @pf: the corresponding PF
987 * @old_cfg: old DCBX configuration data
988 * @new_cfg: new DCBX configuration data
989 *
990 * Find and delete all APPs that are not present in the passed
991 * DCB configuration
992 **/
993void i40e_dcbnl_flush_apps(struct i40e_pf *pf,
994 struct i40e_dcbx_config *old_cfg,
995 struct i40e_dcbx_config *new_cfg)
996{
997 struct i40e_dcb_app_priority_table app;
998 int i;
999
1000 /* MFP mode but not an iSCSI PF so return */
1001 if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) && !(pf->hw.func_caps.iscsi))
1002 return;
1003
1004 for (i = 0; i < old_cfg->numapps; i++) {
1005 app = old_cfg->app[i];
1006 /* The APP is not available anymore delete it */
1007 if (!i40e_dcbnl_find_app(new_cfg, &app))
1008 i40e_dcbnl_del_app(pf, &app);
1009 }
1010}
1011
1012/**
1013 * i40e_dcbnl_setup - DCBNL setup
1014 * @vsi: the corresponding vsi
1015 *
1016 * Set up DCBNL ops and initial APP TLVs
1017 **/
1018void i40e_dcbnl_setup(struct i40e_vsi *vsi)
1019{
1020 struct net_device *dev = vsi->netdev;
1021 struct i40e_pf *pf = i40e_netdev_to_pf(dev);
1022
1023 /* Not DCB capable */
1024 if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
1025 return;
1026
1027 dev->dcbnl_ops = &dcbnl_ops;
1028
1029 /* Set initial IEEE DCB settings */
1030 i40e_dcbnl_set_all(vsi);
1031}
1032#endif /* CONFIG_I40E_DCB */