1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019, Intel Corporation. */
3 
4 #include "ice_common.h"
5 #include "ice_sched.h"
6 #include "ice_dcb.h"
7 
8 /**
9  * ice_aq_get_lldp_mib
10  * @hw: pointer to the HW struct
11  * @bridge_type: type of bridge requested
12  * @mib_type: Local, Remote or both Local and Remote MIBs
13  * @buf: pointer to the caller-supplied buffer to store the MIB block
14  * @buf_size: size of the buffer (in bytes)
15  * @local_len: length of the returned Local LLDP MIB
16  * @remote_len: length of the returned Remote LLDP MIB
17  * @cd: pointer to command details structure or NULL
18  *
19  * Requests the complete LLDP MIB (entire packet). (0x0A00)
20  */
21 static enum ice_status
22 ice_aq_get_lldp_mib(struct ice_hw *hw, u8 bridge_type, u8 mib_type, void *buf,
23 		    u16 buf_size, u16 *local_len, u16 *remote_len,
24 		    struct ice_sq_cd *cd)
25 {
26 	struct ice_aqc_lldp_get_mib *cmd;
27 	struct ice_aq_desc desc;
28 	enum ice_status status;
29 
30 	cmd = &desc.params.lldp_get_mib;
31 
32 	if (buf_size == 0 || !buf)
33 		return ICE_ERR_PARAM;
34 
35 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_get_mib);
36 
37 	cmd->type = mib_type & ICE_AQ_LLDP_MIB_TYPE_M;
38 	cmd->type |= (bridge_type << ICE_AQ_LLDP_BRID_TYPE_S) &
39 		ICE_AQ_LLDP_BRID_TYPE_M;
40 
41 	desc.datalen = cpu_to_le16(buf_size);
42 
43 	status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
44 	if (!status) {
45 		if (local_len)
46 			*local_len = le16_to_cpu(cmd->local_len);
47 		if (remote_len)
48 			*remote_len = le16_to_cpu(cmd->remote_len);
49 	}
50 
51 	return status;
52 }
53 
54 /**
55  * ice_aq_cfg_lldp_mib_change
56  * @hw: pointer to the HW struct
57  * @ena_update: Enable or Disable event posting
58  * @cd: pointer to command details structure or NULL
59  *
60  * Enable or Disable posting of an event on ARQ when LLDP MIB
61  * associated with the interface changes (0x0A01)
62  */
63 static enum ice_status
64 ice_aq_cfg_lldp_mib_change(struct ice_hw *hw, bool ena_update,
65 			   struct ice_sq_cd *cd)
66 {
67 	struct ice_aqc_lldp_set_mib_change *cmd;
68 	struct ice_aq_desc desc;
69 
70 	cmd = &desc.params.lldp_set_event;
71 
72 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_set_mib_change);
73 
74 	if (!ena_update)
75 		cmd->command |= ICE_AQ_LLDP_MIB_UPDATE_DIS;
76 
77 	return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
78 }
79 
80 /**
81  * ice_aq_stop_lldp
82  * @hw: pointer to the HW struct
83  * @shutdown_lldp_agent: True if LLDP Agent needs to be Shutdown
84  *			 False if LLDP Agent needs to be Stopped
85  * @persist: True if Stop/Shutdown of LLDP Agent needs to be persistent across
86  *	     reboots
87  * @cd: pointer to command details structure or NULL
88  *
89  * Stop or Shutdown the embedded LLDP Agent (0x0A05)
90  */
91 enum ice_status
92 ice_aq_stop_lldp(struct ice_hw *hw, bool shutdown_lldp_agent, bool persist,
93 		 struct ice_sq_cd *cd)
94 {
95 	struct ice_aqc_lldp_stop *cmd;
96 	struct ice_aq_desc desc;
97 
98 	cmd = &desc.params.lldp_stop;
99 
100 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_stop);
101 
102 	if (shutdown_lldp_agent)
103 		cmd->command |= ICE_AQ_LLDP_AGENT_SHUTDOWN;
104 
105 	if (persist)
106 		cmd->command |= ICE_AQ_LLDP_AGENT_PERSIST_DIS;
107 
108 	return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
109 }
110 
111 /**
112  * ice_aq_start_lldp
113  * @hw: pointer to the HW struct
114  * @persist: True if Start of LLDP Agent needs to be persistent across reboots
115  * @cd: pointer to command details structure or NULL
116  *
117  * Start the embedded LLDP Agent on all ports. (0x0A06)
118  */
119 enum ice_status
120 ice_aq_start_lldp(struct ice_hw *hw, bool persist, struct ice_sq_cd *cd)
121 {
122 	struct ice_aqc_lldp_start *cmd;
123 	struct ice_aq_desc desc;
124 
125 	cmd = &desc.params.lldp_start;
126 
127 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_start);
128 
129 	cmd->command = ICE_AQ_LLDP_AGENT_START;
130 
131 	if (persist)
132 		cmd->command |= ICE_AQ_LLDP_AGENT_PERSIST_ENA;
133 
134 	return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
135 }
136 
137 /**
138  * ice_aq_set_lldp_mib - Set the LLDP MIB
139  * @hw: pointer to the HW struct
140  * @mib_type: Local, Remote or both Local and Remote MIBs
141  * @buf: pointer to the caller-supplied buffer to store the MIB block
142  * @buf_size: size of the buffer (in bytes)
143  * @cd: pointer to command details structure or NULL
144  *
145  * Set the LLDP MIB. (0x0A08)
146  */
147 static enum ice_status
148 ice_aq_set_lldp_mib(struct ice_hw *hw, u8 mib_type, void *buf, u16 buf_size,
149 		    struct ice_sq_cd *cd)
150 {
151 	struct ice_aqc_lldp_set_local_mib *cmd;
152 	struct ice_aq_desc desc;
153 
154 	cmd = &desc.params.lldp_set_mib;
155 
156 	if (buf_size == 0 || !buf)
157 		return ICE_ERR_PARAM;
158 
159 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_lldp_set_local_mib);
160 
161 	desc.flags |= cpu_to_le16((u16)ICE_AQ_FLAG_RD);
162 	desc.datalen = cpu_to_le16(buf_size);
163 
164 	cmd->type = mib_type;
165 	cmd->length = cpu_to_le16(buf_size);
166 
167 	return ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
168 }
169 
170 /**
171  * ice_get_dcbx_status
172  * @hw: pointer to the HW struct
173  *
174  * Get the DCBX status from the Firmware
175  */
176 static u8 ice_get_dcbx_status(struct ice_hw *hw)
177 {
178 	u32 reg;
179 
180 	reg = rd32(hw, PRTDCB_GENS);
181 	return (u8)((reg & PRTDCB_GENS_DCBX_STATUS_M) >>
182 		    PRTDCB_GENS_DCBX_STATUS_S);
183 }
184 
185 /**
186  * ice_parse_ieee_ets_common_tlv
187  * @buf: Data buffer to be parsed for ETS CFG/REC data
188  * @ets_cfg: Container to store parsed data
189  *
190  * Parses the common data of IEEE 802.1Qaz ETS CFG/REC TLV
191  */
192 static void
193 ice_parse_ieee_ets_common_tlv(u8 *buf, struct ice_dcb_ets_cfg *ets_cfg)
194 {
195 	u8 offset = 0;
196 	int i;
197 
198 	/* Priority Assignment Table (4 octets)
199 	 * Octets:|    1    |    2    |    3    |    4    |
200 	 *        -----------------------------------------
201 	 *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
202 	 *        -----------------------------------------
203 	 *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
204 	 *        -----------------------------------------
205 	 */
206 	for (i = 0; i < 4; i++) {
207 		ets_cfg->prio_table[i * 2] =
208 			((buf[offset] & ICE_IEEE_ETS_PRIO_1_M) >>
209 			 ICE_IEEE_ETS_PRIO_1_S);
210 		ets_cfg->prio_table[i * 2 + 1] =
211 			((buf[offset] & ICE_IEEE_ETS_PRIO_0_M) >>
212 			 ICE_IEEE_ETS_PRIO_0_S);
213 		offset++;
214 	}
215 
216 	/* TC Bandwidth Table (8 octets)
217 	 * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
218 	 *        ---------------------------------
219 	 *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
220 	 *        ---------------------------------
221 	 *
222 	 * TSA Assignment Table (8 octets)
223 	 * Octets:| 9 | 10| 11| 12| 13| 14| 15| 16|
224 	 *        ---------------------------------
225 	 *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
226 	 *        ---------------------------------
227 	 */
228 	ice_for_each_traffic_class(i) {
229 		ets_cfg->tcbwtable[i] = buf[offset];
230 		ets_cfg->tsatable[i] = buf[ICE_MAX_TRAFFIC_CLASS + offset++];
231 	}
232 }
233 
234 /**
235  * ice_parse_ieee_etscfg_tlv
236  * @tlv: IEEE 802.1Qaz ETS CFG TLV
237  * @dcbcfg: Local store to update ETS CFG data
238  *
239  * Parses IEEE 802.1Qaz ETS CFG TLV
240  */
241 static void
242 ice_parse_ieee_etscfg_tlv(struct ice_lldp_org_tlv *tlv,
243 			  struct ice_dcbx_cfg *dcbcfg)
244 {
245 	struct ice_dcb_ets_cfg *etscfg;
246 	u8 *buf = tlv->tlvinfo;
247 
248 	/* First Octet post subtype
249 	 * --------------------------
250 	 * |will-|CBS  | Re-  | Max |
251 	 * |ing  |     |served| TCs |
252 	 * --------------------------
253 	 * |1bit | 1bit|3 bits|3bits|
254 	 */
255 	etscfg = &dcbcfg->etscfg;
256 	etscfg->willing = ((buf[0] & ICE_IEEE_ETS_WILLING_M) >>
257 			   ICE_IEEE_ETS_WILLING_S);
258 	etscfg->cbs = ((buf[0] & ICE_IEEE_ETS_CBS_M) >> ICE_IEEE_ETS_CBS_S);
259 	etscfg->maxtcs = ((buf[0] & ICE_IEEE_ETS_MAXTC_M) >>
260 			  ICE_IEEE_ETS_MAXTC_S);
261 
262 	/* Begin parsing at Priority Assignment Table (offset 1 in buf) */
263 	ice_parse_ieee_ets_common_tlv(&buf[1], etscfg);
264 }
265 
266 /**
267  * ice_parse_ieee_etsrec_tlv
268  * @tlv: IEEE 802.1Qaz ETS REC TLV
269  * @dcbcfg: Local store to update ETS REC data
270  *
271  * Parses IEEE 802.1Qaz ETS REC TLV
272  */
273 static void
274 ice_parse_ieee_etsrec_tlv(struct ice_lldp_org_tlv *tlv,
275 			  struct ice_dcbx_cfg *dcbcfg)
276 {
277 	u8 *buf = tlv->tlvinfo;
278 
279 	/* Begin parsing at Priority Assignment Table (offset 1 in buf) */
280 	ice_parse_ieee_ets_common_tlv(&buf[1], &dcbcfg->etsrec);
281 }
282 
283 /**
284  * ice_parse_ieee_pfccfg_tlv
285  * @tlv: IEEE 802.1Qaz PFC CFG TLV
286  * @dcbcfg: Local store to update PFC CFG data
287  *
288  * Parses IEEE 802.1Qaz PFC CFG TLV
289  */
290 static void
291 ice_parse_ieee_pfccfg_tlv(struct ice_lldp_org_tlv *tlv,
292 			  struct ice_dcbx_cfg *dcbcfg)
293 {
294 	u8 *buf = tlv->tlvinfo;
295 
296 	/* ----------------------------------------
297 	 * |will-|MBC  | Re-  | PFC |  PFC Enable  |
298 	 * |ing  |     |served| cap |              |
299 	 * -----------------------------------------
300 	 * |1bit | 1bit|2 bits|4bits| 1 octet      |
301 	 */
302 	dcbcfg->pfc.willing = ((buf[0] & ICE_IEEE_PFC_WILLING_M) >>
303 			       ICE_IEEE_PFC_WILLING_S);
304 	dcbcfg->pfc.mbc = ((buf[0] & ICE_IEEE_PFC_MBC_M) >> ICE_IEEE_PFC_MBC_S);
305 	dcbcfg->pfc.pfccap = ((buf[0] & ICE_IEEE_PFC_CAP_M) >>
306 			      ICE_IEEE_PFC_CAP_S);
307 	dcbcfg->pfc.pfcena = buf[1];
308 }
309 
310 /**
311  * ice_parse_ieee_app_tlv
312  * @tlv: IEEE 802.1Qaz APP TLV
313  * @dcbcfg: Local store to update APP PRIO data
314  *
315  * Parses IEEE 802.1Qaz APP PRIO TLV
316  */
317 static void
318 ice_parse_ieee_app_tlv(struct ice_lldp_org_tlv *tlv,
319 		       struct ice_dcbx_cfg *dcbcfg)
320 {
321 	u16 offset = 0;
322 	u16 typelen;
323 	int i = 0;
324 	u16 len;
325 	u8 *buf;
326 
327 	typelen = ntohs(tlv->typelen);
328 	len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
329 	buf = tlv->tlvinfo;
330 
331 	/* Removing sizeof(ouisubtype) and reserved byte from len.
332 	 * Remaining len div 3 is number of APP TLVs.
333 	 */
334 	len -= (sizeof(tlv->ouisubtype) + 1);
335 
336 	/* Move offset to App Priority Table */
337 	offset++;
338 
339 	/* Application Priority Table (3 octets)
340 	 * Octets:|         1          |    2    |    3    |
341 	 *        -----------------------------------------
342 	 *        |Priority|Rsrvd| Sel |    Protocol ID    |
343 	 *        -----------------------------------------
344 	 *   Bits:|23    21|20 19|18 16|15                0|
345 	 *        -----------------------------------------
346 	 */
347 	while (offset < len) {
348 		dcbcfg->app[i].priority = ((buf[offset] &
349 					    ICE_IEEE_APP_PRIO_M) >>
350 					   ICE_IEEE_APP_PRIO_S);
351 		dcbcfg->app[i].selector = ((buf[offset] &
352 					    ICE_IEEE_APP_SEL_M) >>
353 					   ICE_IEEE_APP_SEL_S);
354 		dcbcfg->app[i].prot_id = (buf[offset + 1] << 0x8) |
355 			buf[offset + 2];
356 		/* Move to next app */
357 		offset += 3;
358 		i++;
359 		if (i >= ICE_DCBX_MAX_APPS)
360 			break;
361 	}
362 
363 	dcbcfg->numapps = i;
364 }
365 
366 /**
367  * ice_parse_ieee_tlv
368  * @tlv: IEEE 802.1Qaz TLV
369  * @dcbcfg: Local store to update ETS REC data
370  *
371  * Get the TLV subtype and send it to parsing function
372  * based on the subtype value
373  */
374 static void
375 ice_parse_ieee_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
376 {
377 	u32 ouisubtype;
378 	u8 subtype;
379 
380 	ouisubtype = ntohl(tlv->ouisubtype);
381 	subtype = (u8)((ouisubtype & ICE_LLDP_TLV_SUBTYPE_M) >>
382 		       ICE_LLDP_TLV_SUBTYPE_S);
383 	switch (subtype) {
384 	case ICE_IEEE_SUBTYPE_ETS_CFG:
385 		ice_parse_ieee_etscfg_tlv(tlv, dcbcfg);
386 		break;
387 	case ICE_IEEE_SUBTYPE_ETS_REC:
388 		ice_parse_ieee_etsrec_tlv(tlv, dcbcfg);
389 		break;
390 	case ICE_IEEE_SUBTYPE_PFC_CFG:
391 		ice_parse_ieee_pfccfg_tlv(tlv, dcbcfg);
392 		break;
393 	case ICE_IEEE_SUBTYPE_APP_PRI:
394 		ice_parse_ieee_app_tlv(tlv, dcbcfg);
395 		break;
396 	default:
397 		break;
398 	}
399 }
400 
401 /**
402  * ice_parse_cee_pgcfg_tlv
403  * @tlv: CEE DCBX PG CFG TLV
404  * @dcbcfg: Local store to update ETS CFG data
405  *
406  * Parses CEE DCBX PG CFG TLV
407  */
408 static void
409 ice_parse_cee_pgcfg_tlv(struct ice_cee_feat_tlv *tlv,
410 			struct ice_dcbx_cfg *dcbcfg)
411 {
412 	struct ice_dcb_ets_cfg *etscfg;
413 	u8 *buf = tlv->tlvinfo;
414 	u16 offset = 0;
415 	int i;
416 
417 	etscfg = &dcbcfg->etscfg;
418 
419 	if (tlv->en_will_err & ICE_CEE_FEAT_TLV_WILLING_M)
420 		etscfg->willing = 1;
421 
422 	etscfg->cbs = 0;
423 	/* Priority Group Table (4 octets)
424 	 * Octets:|    1    |    2    |    3    |    4    |
425 	 *        -----------------------------------------
426 	 *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
427 	 *        -----------------------------------------
428 	 *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
429 	 *        -----------------------------------------
430 	 */
431 	for (i = 0; i < 4; i++) {
432 		etscfg->prio_table[i * 2] =
433 			((buf[offset] & ICE_CEE_PGID_PRIO_1_M) >>
434 			 ICE_CEE_PGID_PRIO_1_S);
435 		etscfg->prio_table[i * 2 + 1] =
436 			((buf[offset] & ICE_CEE_PGID_PRIO_0_M) >>
437 			 ICE_CEE_PGID_PRIO_0_S);
438 		offset++;
439 	}
440 
441 	/* PG Percentage Table (8 octets)
442 	 * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
443 	 *        ---------------------------------
444 	 *        |pg0|pg1|pg2|pg3|pg4|pg5|pg6|pg7|
445 	 *        ---------------------------------
446 	 */
447 	ice_for_each_traffic_class(i) {
448 		etscfg->tcbwtable[i] = buf[offset++];
449 
450 		if (etscfg->prio_table[i] == ICE_CEE_PGID_STRICT)
451 			dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_STRICT;
452 		else
453 			dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_ETS;
454 	}
455 
456 	/* Number of TCs supported (1 octet) */
457 	etscfg->maxtcs = buf[offset];
458 }
459 
460 /**
461  * ice_parse_cee_pfccfg_tlv
462  * @tlv: CEE DCBX PFC CFG TLV
463  * @dcbcfg: Local store to update PFC CFG data
464  *
465  * Parses CEE DCBX PFC CFG TLV
466  */
467 static void
468 ice_parse_cee_pfccfg_tlv(struct ice_cee_feat_tlv *tlv,
469 			 struct ice_dcbx_cfg *dcbcfg)
470 {
471 	u8 *buf = tlv->tlvinfo;
472 
473 	if (tlv->en_will_err & ICE_CEE_FEAT_TLV_WILLING_M)
474 		dcbcfg->pfc.willing = 1;
475 
476 	/* ------------------------
477 	 * | PFC Enable | PFC TCs |
478 	 * ------------------------
479 	 * | 1 octet    | 1 octet |
480 	 */
481 	dcbcfg->pfc.pfcena = buf[0];
482 	dcbcfg->pfc.pfccap = buf[1];
483 }
484 
485 /**
486  * ice_parse_cee_app_tlv
487  * @tlv: CEE DCBX APP TLV
488  * @dcbcfg: Local store to update APP PRIO data
489  *
490  * Parses CEE DCBX APP PRIO TLV
491  */
492 static void
493 ice_parse_cee_app_tlv(struct ice_cee_feat_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
494 {
495 	u16 len, typelen, offset = 0;
496 	struct ice_cee_app_prio *app;
497 	u8 i;
498 
499 	typelen = ntohs(tlv->hdr.typelen);
500 	len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
501 
502 	dcbcfg->numapps = len / sizeof(*app);
503 	if (!dcbcfg->numapps)
504 		return;
505 	if (dcbcfg->numapps > ICE_DCBX_MAX_APPS)
506 		dcbcfg->numapps = ICE_DCBX_MAX_APPS;
507 
508 	for (i = 0; i < dcbcfg->numapps; i++) {
509 		u8 up, selector;
510 
511 		app = (struct ice_cee_app_prio *)(tlv->tlvinfo + offset);
512 		for (up = 0; up < ICE_MAX_USER_PRIORITY; up++)
513 			if (app->prio_map & BIT(up))
514 				break;
515 
516 		dcbcfg->app[i].priority = up;
517 
518 		/* Get Selector from lower 2 bits, and convert to IEEE */
519 		selector = (app->upper_oui_sel & ICE_CEE_APP_SELECTOR_M);
520 		switch (selector) {
521 		case ICE_CEE_APP_SEL_ETHTYPE:
522 			dcbcfg->app[i].selector = ICE_APP_SEL_ETHTYPE;
523 			break;
524 		case ICE_CEE_APP_SEL_TCPIP:
525 			dcbcfg->app[i].selector = ICE_APP_SEL_TCPIP;
526 			break;
527 		default:
528 			/* Keep selector as it is for unknown types */
529 			dcbcfg->app[i].selector = selector;
530 		}
531 
532 		dcbcfg->app[i].prot_id = ntohs(app->protocol);
533 		/* Move to next app */
534 		offset += sizeof(*app);
535 	}
536 }
537 
538 /**
539  * ice_parse_cee_tlv
540  * @tlv: CEE DCBX TLV
541  * @dcbcfg: Local store to update DCBX config data
542  *
543  * Get the TLV subtype and send it to parsing function
544  * based on the subtype value
545  */
546 static void
547 ice_parse_cee_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
548 {
549 	struct ice_cee_feat_tlv *sub_tlv;
550 	u8 subtype, feat_tlv_count = 0;
551 	u16 len, tlvlen, typelen;
552 	u32 ouisubtype;
553 
554 	ouisubtype = ntohl(tlv->ouisubtype);
555 	subtype = (u8)((ouisubtype & ICE_LLDP_TLV_SUBTYPE_M) >>
556 		       ICE_LLDP_TLV_SUBTYPE_S);
557 	/* Return if not CEE DCBX */
558 	if (subtype != ICE_CEE_DCBX_TYPE)
559 		return;
560 
561 	typelen = ntohs(tlv->typelen);
562 	tlvlen = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
563 	len = sizeof(tlv->typelen) + sizeof(ouisubtype) +
564 		sizeof(struct ice_cee_ctrl_tlv);
565 	/* Return if no CEE DCBX Feature TLVs */
566 	if (tlvlen <= len)
567 		return;
568 
569 	sub_tlv = (struct ice_cee_feat_tlv *)((char *)tlv + len);
570 	while (feat_tlv_count < ICE_CEE_MAX_FEAT_TYPE) {
571 		u16 sublen;
572 
573 		typelen = ntohs(sub_tlv->hdr.typelen);
574 		sublen = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
575 		subtype = (u8)((typelen & ICE_LLDP_TLV_TYPE_M) >>
576 			       ICE_LLDP_TLV_TYPE_S);
577 		switch (subtype) {
578 		case ICE_CEE_SUBTYPE_PG_CFG:
579 			ice_parse_cee_pgcfg_tlv(sub_tlv, dcbcfg);
580 			break;
581 		case ICE_CEE_SUBTYPE_PFC_CFG:
582 			ice_parse_cee_pfccfg_tlv(sub_tlv, dcbcfg);
583 			break;
584 		case ICE_CEE_SUBTYPE_APP_PRI:
585 			ice_parse_cee_app_tlv(sub_tlv, dcbcfg);
586 			break;
587 		default:
588 			return;	/* Invalid Sub-type return */
589 		}
590 		feat_tlv_count++;
591 		/* Move to next sub TLV */
592 		sub_tlv = (struct ice_cee_feat_tlv *)
593 			  ((char *)sub_tlv + sizeof(sub_tlv->hdr.typelen) +
594 			   sublen);
595 	}
596 }
597 
598 /**
599  * ice_parse_org_tlv
600  * @tlv: Organization specific TLV
601  * @dcbcfg: Local store to update ETS REC data
602  *
603  * Currently only IEEE 802.1Qaz TLV is supported, all others
604  * will be returned
605  */
606 static void
607 ice_parse_org_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
608 {
609 	u32 ouisubtype;
610 	u32 oui;
611 
612 	ouisubtype = ntohl(tlv->ouisubtype);
613 	oui = ((ouisubtype & ICE_LLDP_TLV_OUI_M) >> ICE_LLDP_TLV_OUI_S);
614 	switch (oui) {
615 	case ICE_IEEE_8021QAZ_OUI:
616 		ice_parse_ieee_tlv(tlv, dcbcfg);
617 		break;
618 	case ICE_CEE_DCBX_OUI:
619 		ice_parse_cee_tlv(tlv, dcbcfg);
620 		break;
621 	default:
622 		break;
623 	}
624 }
625 
626 /**
627  * ice_lldp_to_dcb_cfg
628  * @lldpmib: LLDPDU to be parsed
629  * @dcbcfg: store for LLDPDU data
630  *
631  * Parse DCB configuration from the LLDPDU
632  */
633 static enum ice_status
634 ice_lldp_to_dcb_cfg(u8 *lldpmib, struct ice_dcbx_cfg *dcbcfg)
635 {
636 	struct ice_lldp_org_tlv *tlv;
637 	enum ice_status ret = 0;
638 	u16 offset = 0;
639 	u16 typelen;
640 	u16 type;
641 	u16 len;
642 
643 	if (!lldpmib || !dcbcfg)
644 		return ICE_ERR_PARAM;
645 
646 	/* set to the start of LLDPDU */
647 	lldpmib += ETH_HLEN;
648 	tlv = (struct ice_lldp_org_tlv *)lldpmib;
649 	while (1) {
650 		typelen = ntohs(tlv->typelen);
651 		type = ((typelen & ICE_LLDP_TLV_TYPE_M) >> ICE_LLDP_TLV_TYPE_S);
652 		len = ((typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S);
653 		offset += sizeof(typelen) + len;
654 
655 		/* END TLV or beyond LLDPDU size */
656 		if (type == ICE_TLV_TYPE_END || offset > ICE_LLDPDU_SIZE)
657 			break;
658 
659 		switch (type) {
660 		case ICE_TLV_TYPE_ORG:
661 			ice_parse_org_tlv(tlv, dcbcfg);
662 			break;
663 		default:
664 			break;
665 		}
666 
667 		/* Move to next TLV */
668 		tlv = (struct ice_lldp_org_tlv *)
669 		      ((char *)tlv + sizeof(tlv->typelen) + len);
670 	}
671 
672 	return ret;
673 }
674 
675 /**
676  * ice_aq_get_dcb_cfg
677  * @hw: pointer to the HW struct
678  * @mib_type: MIB type for the query
679  * @bridgetype: bridge type for the query (remote)
680  * @dcbcfg: store for LLDPDU data
681  *
682  * Query DCB configuration from the firmware
683  */
684 enum ice_status
685 ice_aq_get_dcb_cfg(struct ice_hw *hw, u8 mib_type, u8 bridgetype,
686 		   struct ice_dcbx_cfg *dcbcfg)
687 {
688 	enum ice_status ret;
689 	u8 *lldpmib;
690 
691 	/* Allocate the LLDPDU */
692 	lldpmib = devm_kzalloc(ice_hw_to_dev(hw), ICE_LLDPDU_SIZE, GFP_KERNEL);
693 	if (!lldpmib)
694 		return ICE_ERR_NO_MEMORY;
695 
696 	ret = ice_aq_get_lldp_mib(hw, bridgetype, mib_type, (void *)lldpmib,
697 				  ICE_LLDPDU_SIZE, NULL, NULL, NULL);
698 
699 	if (!ret)
700 		/* Parse LLDP MIB to get DCB configuration */
701 		ret = ice_lldp_to_dcb_cfg(lldpmib, dcbcfg);
702 
703 	devm_kfree(ice_hw_to_dev(hw), lldpmib);
704 
705 	return ret;
706 }
707 
708 /**
709  * ice_aq_start_stop_dcbx - Start/Stop DCBX service in FW
710  * @hw: pointer to the HW struct
711  * @start_dcbx_agent: True if DCBX Agent needs to be started
712  *		      False if DCBX Agent needs to be stopped
713  * @dcbx_agent_status: FW indicates back the DCBX agent status
714  *		       True if DCBX Agent is active
715  *		       False if DCBX Agent is stopped
716  * @cd: pointer to command details structure or NULL
717  *
718  * Start/Stop the embedded dcbx Agent. In case that this wrapper function
719  * returns ICE_SUCCESS, caller will need to check if FW returns back the same
720  * value as stated in dcbx_agent_status, and react accordingly. (0x0A09)
721  */
722 enum ice_status
723 ice_aq_start_stop_dcbx(struct ice_hw *hw, bool start_dcbx_agent,
724 		       bool *dcbx_agent_status, struct ice_sq_cd *cd)
725 {
726 	struct ice_aqc_lldp_stop_start_specific_agent *cmd;
727 	enum ice_status status;
728 	struct ice_aq_desc desc;
729 	u16 opcode;
730 
731 	cmd = &desc.params.lldp_agent_ctrl;
732 
733 	opcode = ice_aqc_opc_lldp_stop_start_specific_agent;
734 
735 	ice_fill_dflt_direct_cmd_desc(&desc, opcode);
736 
737 	if (start_dcbx_agent)
738 		cmd->command = ICE_AQC_START_STOP_AGENT_START_DCBX;
739 
740 	status = ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
741 
742 	*dcbx_agent_status = false;
743 
744 	if (!status &&
745 	    cmd->command == ICE_AQC_START_STOP_AGENT_START_DCBX)
746 		*dcbx_agent_status = true;
747 
748 	return status;
749 }
750 
751 /**
752  * ice_aq_get_cee_dcb_cfg
753  * @hw: pointer to the HW struct
754  * @buff: response buffer that stores CEE operational configuration
755  * @cd: pointer to command details structure or NULL
756  *
757  * Get CEE DCBX mode operational configuration from firmware (0x0A07)
758  */
759 static enum ice_status
760 ice_aq_get_cee_dcb_cfg(struct ice_hw *hw,
761 		       struct ice_aqc_get_cee_dcb_cfg_resp *buff,
762 		       struct ice_sq_cd *cd)
763 {
764 	struct ice_aq_desc desc;
765 
766 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_get_cee_dcb_cfg);
767 
768 	return ice_aq_send_cmd(hw, &desc, (void *)buff, sizeof(*buff), cd);
769 }
770 
771 /**
772  * ice_cee_to_dcb_cfg
773  * @cee_cfg: pointer to CEE configuration struct
774  * @dcbcfg: DCB configuration struct
775  *
776  * Convert CEE configuration from firmware to DCB configuration
777  */
778 static void
779 ice_cee_to_dcb_cfg(struct ice_aqc_get_cee_dcb_cfg_resp *cee_cfg,
780 		   struct ice_dcbx_cfg *dcbcfg)
781 {
782 	u32 status, tlv_status = le32_to_cpu(cee_cfg->tlv_status);
783 	u32 ice_aqc_cee_status_mask, ice_aqc_cee_status_shift;
784 	u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
785 	u8 i, err, sync, oper, app_index, ice_app_sel_type;
786 	u16 ice_aqc_cee_app_mask, ice_aqc_cee_app_shift;
787 	u16 ice_app_prot_id_type;
788 
789 	/* CEE PG data to ETS config */
790 	dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;
791 
792 	/* Note that the FW creates the oper_prio_tc nibbles reversed
793 	 * from those in the CEE Priority Group sub-TLV.
794 	 */
795 	for (i = 0; i < ICE_MAX_TRAFFIC_CLASS / 2; i++) {
796 		dcbcfg->etscfg.prio_table[i * 2] =
797 			((cee_cfg->oper_prio_tc[i] & ICE_CEE_PGID_PRIO_0_M) >>
798 			 ICE_CEE_PGID_PRIO_0_S);
799 		dcbcfg->etscfg.prio_table[i * 2 + 1] =
800 			((cee_cfg->oper_prio_tc[i] & ICE_CEE_PGID_PRIO_1_M) >>
801 			 ICE_CEE_PGID_PRIO_1_S);
802 	}
803 
804 	ice_for_each_traffic_class(i) {
805 		dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];
806 
807 		if (dcbcfg->etscfg.prio_table[i] == ICE_CEE_PGID_STRICT) {
808 			/* Map it to next empty TC */
809 			dcbcfg->etscfg.prio_table[i] = cee_cfg->oper_num_tc - 1;
810 			dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_STRICT;
811 		} else {
812 			dcbcfg->etscfg.tsatable[i] = ICE_IEEE_TSA_ETS;
813 		}
814 	}
815 
816 	/* CEE PFC data to ETS config */
817 	dcbcfg->pfc.pfcena = cee_cfg->oper_pfc_en;
818 	dcbcfg->pfc.pfccap = ICE_MAX_TRAFFIC_CLASS;
819 
820 	app_index = 0;
821 	for (i = 0; i < 3; i++) {
822 		if (i == 0) {
823 			/* FCoE APP */
824 			ice_aqc_cee_status_mask = ICE_AQC_CEE_FCOE_STATUS_M;
825 			ice_aqc_cee_status_shift = ICE_AQC_CEE_FCOE_STATUS_S;
826 			ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_FCOE_M;
827 			ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_FCOE_S;
828 			ice_app_sel_type = ICE_APP_SEL_ETHTYPE;
829 			ice_app_prot_id_type = ICE_APP_PROT_ID_FCOE;
830 		} else if (i == 1) {
831 			/* iSCSI APP */
832 			ice_aqc_cee_status_mask = ICE_AQC_CEE_ISCSI_STATUS_M;
833 			ice_aqc_cee_status_shift = ICE_AQC_CEE_ISCSI_STATUS_S;
834 			ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_ISCSI_M;
835 			ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_ISCSI_S;
836 			ice_app_sel_type = ICE_APP_SEL_TCPIP;
837 			ice_app_prot_id_type = ICE_APP_PROT_ID_ISCSI;
838 		} else {
839 			/* FIP APP */
840 			ice_aqc_cee_status_mask = ICE_AQC_CEE_FIP_STATUS_M;
841 			ice_aqc_cee_status_shift = ICE_AQC_CEE_FIP_STATUS_S;
842 			ice_aqc_cee_app_mask = ICE_AQC_CEE_APP_FIP_M;
843 			ice_aqc_cee_app_shift = ICE_AQC_CEE_APP_FIP_S;
844 			ice_app_sel_type = ICE_APP_SEL_ETHTYPE;
845 			ice_app_prot_id_type = ICE_APP_PROT_ID_FIP;
846 		}
847 
848 		status = (tlv_status & ice_aqc_cee_status_mask) >>
849 			 ice_aqc_cee_status_shift;
850 		err = (status & ICE_TLV_STATUS_ERR) ? 1 : 0;
851 		sync = (status & ICE_TLV_STATUS_SYNC) ? 1 : 0;
852 		oper = (status & ICE_TLV_STATUS_OPER) ? 1 : 0;
853 		/* Add FCoE/iSCSI/FIP APP if Error is False and
854 		 * Oper/Sync is True
855 		 */
856 		if (!err && sync && oper) {
857 			dcbcfg->app[app_index].priority =
858 				(app_prio & ice_aqc_cee_app_mask) >>
859 				ice_aqc_cee_app_shift;
860 			dcbcfg->app[app_index].selector = ice_app_sel_type;
861 			dcbcfg->app[app_index].prot_id = ice_app_prot_id_type;
862 			app_index++;
863 		}
864 	}
865 
866 	dcbcfg->numapps = app_index;
867 }
868 
869 /**
870  * ice_get_ieee_dcb_cfg
871  * @pi: port information structure
872  * @dcbx_mode: mode of DCBX (IEEE or CEE)
873  *
874  * Get IEEE or CEE mode DCB configuration from the Firmware
875  */
876 static enum ice_status
877 ice_get_ieee_or_cee_dcb_cfg(struct ice_port_info *pi, u8 dcbx_mode)
878 {
879 	struct ice_dcbx_cfg *dcbx_cfg = NULL;
880 	enum ice_status ret;
881 
882 	if (!pi)
883 		return ICE_ERR_PARAM;
884 
885 	if (dcbx_mode == ICE_DCBX_MODE_IEEE)
886 		dcbx_cfg = &pi->local_dcbx_cfg;
887 	else if (dcbx_mode == ICE_DCBX_MODE_CEE)
888 		dcbx_cfg = &pi->desired_dcbx_cfg;
889 
890 	/* Get Local DCB Config in case of ICE_DCBX_MODE_IEEE
891 	 * or get CEE DCB Desired Config in case of ICE_DCBX_MODE_CEE
892 	 */
893 	ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_LOCAL,
894 				 ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID, dcbx_cfg);
895 	if (ret)
896 		goto out;
897 
898 	/* Get Remote DCB Config */
899 	dcbx_cfg = &pi->remote_dcbx_cfg;
900 	ret = ice_aq_get_dcb_cfg(pi->hw, ICE_AQ_LLDP_MIB_REMOTE,
901 				 ICE_AQ_LLDP_BRID_TYPE_NEAREST_BRID, dcbx_cfg);
902 	/* Don't treat ENOENT as an error for Remote MIBs */
903 	if (pi->hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT)
904 		ret = 0;
905 
906 out:
907 	return ret;
908 }
909 
910 /**
911  * ice_get_dcb_cfg
912  * @pi: port information structure
913  *
914  * Get DCB configuration from the Firmware
915  */
916 enum ice_status ice_get_dcb_cfg(struct ice_port_info *pi)
917 {
918 	struct ice_aqc_get_cee_dcb_cfg_resp cee_cfg;
919 	struct ice_dcbx_cfg *dcbx_cfg;
920 	enum ice_status ret;
921 
922 	if (!pi)
923 		return ICE_ERR_PARAM;
924 
925 	ret = ice_aq_get_cee_dcb_cfg(pi->hw, &cee_cfg, NULL);
926 	if (!ret) {
927 		/* CEE mode */
928 		dcbx_cfg = &pi->local_dcbx_cfg;
929 		dcbx_cfg->dcbx_mode = ICE_DCBX_MODE_CEE;
930 		dcbx_cfg->tlv_status = le32_to_cpu(cee_cfg.tlv_status);
931 		ice_cee_to_dcb_cfg(&cee_cfg, dcbx_cfg);
932 		ret = ice_get_ieee_or_cee_dcb_cfg(pi, ICE_DCBX_MODE_CEE);
933 	} else if (pi->hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT) {
934 		/* CEE mode not enabled try querying IEEE data */
935 		dcbx_cfg = &pi->local_dcbx_cfg;
936 		dcbx_cfg->dcbx_mode = ICE_DCBX_MODE_IEEE;
937 		ret = ice_get_ieee_or_cee_dcb_cfg(pi, ICE_DCBX_MODE_IEEE);
938 	}
939 
940 	return ret;
941 }
942 
943 /**
944  * ice_init_dcb
945  * @hw: pointer to the HW struct
946  * @enable_mib_change: enable MIB change event
947  *
948  * Update DCB configuration from the Firmware
949  */
950 enum ice_status ice_init_dcb(struct ice_hw *hw, bool enable_mib_change)
951 {
952 	struct ice_port_info *pi = hw->port_info;
953 	enum ice_status ret = 0;
954 
955 	if (!hw->func_caps.common_cap.dcb)
956 		return ICE_ERR_NOT_SUPPORTED;
957 
958 	pi->is_sw_lldp = true;
959 
960 	/* Get DCBX status */
961 	pi->dcbx_status = ice_get_dcbx_status(hw);
962 
963 	if (pi->dcbx_status == ICE_DCBX_STATUS_DONE ||
964 	    pi->dcbx_status == ICE_DCBX_STATUS_IN_PROGRESS ||
965 	    pi->dcbx_status == ICE_DCBX_STATUS_NOT_STARTED) {
966 		/* Get current DCBX configuration */
967 		ret = ice_get_dcb_cfg(pi);
968 		pi->is_sw_lldp = (hw->adminq.sq_last_status == ICE_AQ_RC_EPERM);
969 		if (ret)
970 			return ret;
971 	} else if (pi->dcbx_status == ICE_DCBX_STATUS_DIS) {
972 		return ICE_ERR_NOT_READY;
973 	}
974 
975 	/* Configure the LLDP MIB change event */
976 	if (enable_mib_change) {
977 		ret = ice_aq_cfg_lldp_mib_change(hw, true, NULL);
978 		if (!ret)
979 			pi->is_sw_lldp = false;
980 	}
981 
982 	return ret;
983 }
984 
985 /**
986  * ice_cfg_lldp_mib_change
987  * @hw: pointer to the HW struct
988  * @ena_mib: enable/disable MIB change event
989  *
990  * Configure (disable/enable) MIB
991  */
992 enum ice_status ice_cfg_lldp_mib_change(struct ice_hw *hw, bool ena_mib)
993 {
994 	struct ice_port_info *pi = hw->port_info;
995 	enum ice_status ret;
996 
997 	if (!hw->func_caps.common_cap.dcb)
998 		return ICE_ERR_NOT_SUPPORTED;
999 
1000 	/* Get DCBX status */
1001 	pi->dcbx_status = ice_get_dcbx_status(hw);
1002 
1003 	if (pi->dcbx_status == ICE_DCBX_STATUS_DIS)
1004 		return ICE_ERR_NOT_READY;
1005 
1006 	ret = ice_aq_cfg_lldp_mib_change(hw, ena_mib, NULL);
1007 	if (!ret)
1008 		pi->is_sw_lldp = !ena_mib;
1009 
1010 	return ret;
1011 }
1012 
1013 /**
1014  * ice_add_ieee_ets_common_tlv
1015  * @buf: Data buffer to be populated with ice_dcb_ets_cfg data
1016  * @ets_cfg: Container for ice_dcb_ets_cfg data
1017  *
1018  * Populate the TLV buffer with ice_dcb_ets_cfg data
1019  */
1020 static void
1021 ice_add_ieee_ets_common_tlv(u8 *buf, struct ice_dcb_ets_cfg *ets_cfg)
1022 {
1023 	u8 priority0, priority1;
1024 	u8 offset = 0;
1025 	int i;
1026 
1027 	/* Priority Assignment Table (4 octets)
1028 	 * Octets:|    1    |    2    |    3    |    4    |
1029 	 *        -----------------------------------------
1030 	 *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
1031 	 *        -----------------------------------------
1032 	 *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
1033 	 *        -----------------------------------------
1034 	 */
1035 	for (i = 0; i < ICE_MAX_TRAFFIC_CLASS / 2; i++) {
1036 		priority0 = ets_cfg->prio_table[i * 2] & 0xF;
1037 		priority1 = ets_cfg->prio_table[i * 2 + 1] & 0xF;
1038 		buf[offset] = (priority0 << ICE_IEEE_ETS_PRIO_1_S) | priority1;
1039 		offset++;
1040 	}
1041 
1042 	/* TC Bandwidth Table (8 octets)
1043 	 * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
1044 	 *        ---------------------------------
1045 	 *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
1046 	 *        ---------------------------------
1047 	 *
1048 	 * TSA Assignment Table (8 octets)
1049 	 * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
1050 	 *        ---------------------------------
1051 	 *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
1052 	 *        ---------------------------------
1053 	 */
1054 	ice_for_each_traffic_class(i) {
1055 		buf[offset] = ets_cfg->tcbwtable[i];
1056 		buf[ICE_MAX_TRAFFIC_CLASS + offset] = ets_cfg->tsatable[i];
1057 		offset++;
1058 	}
1059 }
1060 
1061 /**
1062  * ice_add_ieee_ets_tlv - Prepare ETS TLV in IEEE format
1063  * @tlv: Fill the ETS config data in IEEE format
1064  * @dcbcfg: Local store which holds the DCB Config
1065  *
1066  * Prepare IEEE 802.1Qaz ETS CFG TLV
1067  */
1068 static void
1069 ice_add_ieee_ets_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
1070 {
1071 	struct ice_dcb_ets_cfg *etscfg;
1072 	u8 *buf = tlv->tlvinfo;
1073 	u8 maxtcwilling = 0;
1074 	u32 ouisubtype;
1075 	u16 typelen;
1076 
1077 	typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) |
1078 		   ICE_IEEE_ETS_TLV_LEN);
1079 	tlv->typelen = htons(typelen);
1080 
1081 	ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
1082 		      ICE_IEEE_SUBTYPE_ETS_CFG);
1083 	tlv->ouisubtype = htonl(ouisubtype);
1084 
1085 	/* First Octet post subtype
1086 	 * --------------------------
1087 	 * |will-|CBS  | Re-  | Max |
1088 	 * |ing  |     |served| TCs |
1089 	 * --------------------------
1090 	 * |1bit | 1bit|3 bits|3bits|
1091 	 */
1092 	etscfg = &dcbcfg->etscfg;
1093 	if (etscfg->willing)
1094 		maxtcwilling = BIT(ICE_IEEE_ETS_WILLING_S);
1095 	maxtcwilling |= etscfg->maxtcs & ICE_IEEE_ETS_MAXTC_M;
1096 	buf[0] = maxtcwilling;
1097 
1098 	/* Begin adding at Priority Assignment Table (offset 1 in buf) */
1099 	ice_add_ieee_ets_common_tlv(&buf[1], etscfg);
1100 }
1101 
1102 /**
1103  * ice_add_ieee_etsrec_tlv - Prepare ETS Recommended TLV in IEEE format
1104  * @tlv: Fill ETS Recommended TLV in IEEE format
1105  * @dcbcfg: Local store which holds the DCB Config
1106  *
1107  * Prepare IEEE 802.1Qaz ETS REC TLV
1108  */
1109 static void
1110 ice_add_ieee_etsrec_tlv(struct ice_lldp_org_tlv *tlv,
1111 			struct ice_dcbx_cfg *dcbcfg)
1112 {
1113 	struct ice_dcb_ets_cfg *etsrec;
1114 	u8 *buf = tlv->tlvinfo;
1115 	u32 ouisubtype;
1116 	u16 typelen;
1117 
1118 	typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) |
1119 		   ICE_IEEE_ETS_TLV_LEN);
1120 	tlv->typelen = htons(typelen);
1121 
1122 	ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
1123 		      ICE_IEEE_SUBTYPE_ETS_REC);
1124 	tlv->ouisubtype = htonl(ouisubtype);
1125 
1126 	etsrec = &dcbcfg->etsrec;
1127 
1128 	/* First Octet is reserved */
1129 	/* Begin adding at Priority Assignment Table (offset 1 in buf) */
1130 	ice_add_ieee_ets_common_tlv(&buf[1], etsrec);
1131 }
1132 
1133 /**
1134  * ice_add_ieee_pfc_tlv - Prepare PFC TLV in IEEE format
1135  * @tlv: Fill PFC TLV in IEEE format
1136  * @dcbcfg: Local store which holds the PFC CFG data
1137  *
1138  * Prepare IEEE 802.1Qaz PFC CFG TLV
1139  */
1140 static void
1141 ice_add_ieee_pfc_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg)
1142 {
1143 	u8 *buf = tlv->tlvinfo;
1144 	u32 ouisubtype;
1145 	u16 typelen;
1146 
1147 	typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) |
1148 		   ICE_IEEE_PFC_TLV_LEN);
1149 	tlv->typelen = htons(typelen);
1150 
1151 	ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
1152 		      ICE_IEEE_SUBTYPE_PFC_CFG);
1153 	tlv->ouisubtype = htonl(ouisubtype);
1154 
1155 	/* ----------------------------------------
1156 	 * |will-|MBC  | Re-  | PFC |  PFC Enable  |
1157 	 * |ing  |     |served| cap |              |
1158 	 * -----------------------------------------
1159 	 * |1bit | 1bit|2 bits|4bits| 1 octet      |
1160 	 */
1161 	if (dcbcfg->pfc.willing)
1162 		buf[0] = BIT(ICE_IEEE_PFC_WILLING_S);
1163 
1164 	if (dcbcfg->pfc.mbc)
1165 		buf[0] |= BIT(ICE_IEEE_PFC_MBC_S);
1166 
1167 	buf[0] |= dcbcfg->pfc.pfccap & 0xF;
1168 	buf[1] = dcbcfg->pfc.pfcena;
1169 }
1170 
1171 /**
1172  * ice_add_ieee_app_pri_tlv -  Prepare APP TLV in IEEE format
1173  * @tlv: Fill APP TLV in IEEE format
1174  * @dcbcfg: Local store which holds the APP CFG data
1175  *
1176  * Prepare IEEE 802.1Qaz APP CFG TLV
1177  */
1178 static void
1179 ice_add_ieee_app_pri_tlv(struct ice_lldp_org_tlv *tlv,
1180 			 struct ice_dcbx_cfg *dcbcfg)
1181 {
1182 	u16 typelen, len, offset = 0;
1183 	u8 priority, selector, i = 0;
1184 	u8 *buf = tlv->tlvinfo;
1185 	u32 ouisubtype;
1186 
1187 	/* No APP TLVs then just return */
1188 	if (dcbcfg->numapps == 0)
1189 		return;
1190 	ouisubtype = ((ICE_IEEE_8021QAZ_OUI << ICE_LLDP_TLV_OUI_S) |
1191 		      ICE_IEEE_SUBTYPE_APP_PRI);
1192 	tlv->ouisubtype = htonl(ouisubtype);
1193 
1194 	/* Move offset to App Priority Table */
1195 	offset++;
1196 	/* Application Priority Table (3 octets)
1197 	 * Octets:|         1          |    2    |    3    |
1198 	 *        -----------------------------------------
1199 	 *        |Priority|Rsrvd| Sel |    Protocol ID    |
1200 	 *        -----------------------------------------
1201 	 *   Bits:|23    21|20 19|18 16|15                0|
1202 	 *        -----------------------------------------
1203 	 */
1204 	while (i < dcbcfg->numapps) {
1205 		priority = dcbcfg->app[i].priority & 0x7;
1206 		selector = dcbcfg->app[i].selector & 0x7;
1207 		buf[offset] = (priority << ICE_IEEE_APP_PRIO_S) | selector;
1208 		buf[offset + 1] = (dcbcfg->app[i].prot_id >> 0x8) & 0xFF;
1209 		buf[offset + 2] = dcbcfg->app[i].prot_id & 0xFF;
1210 		/* Move to next app */
1211 		offset += 3;
1212 		i++;
1213 		if (i >= ICE_DCBX_MAX_APPS)
1214 			break;
1215 	}
1216 	/* len includes size of ouisubtype + 1 reserved + 3*numapps */
1217 	len = sizeof(tlv->ouisubtype) + 1 + (i * 3);
1218 	typelen = ((ICE_TLV_TYPE_ORG << ICE_LLDP_TLV_TYPE_S) | (len & 0x1FF));
1219 	tlv->typelen = htons(typelen);
1220 }
1221 
1222 /**
1223  * ice_add_dcb_tlv - Add all IEEE TLVs
1224  * @tlv: Fill TLV data in IEEE format
1225  * @dcbcfg: Local store which holds the DCB Config
1226  * @tlvid: Type of IEEE TLV
1227  *
1228  * Add tlv information
1229  */
1230 static void
1231 ice_add_dcb_tlv(struct ice_lldp_org_tlv *tlv, struct ice_dcbx_cfg *dcbcfg,
1232 		u16 tlvid)
1233 {
1234 	switch (tlvid) {
1235 	case ICE_IEEE_TLV_ID_ETS_CFG:
1236 		ice_add_ieee_ets_tlv(tlv, dcbcfg);
1237 		break;
1238 	case ICE_IEEE_TLV_ID_ETS_REC:
1239 		ice_add_ieee_etsrec_tlv(tlv, dcbcfg);
1240 		break;
1241 	case ICE_IEEE_TLV_ID_PFC_CFG:
1242 		ice_add_ieee_pfc_tlv(tlv, dcbcfg);
1243 		break;
1244 	case ICE_IEEE_TLV_ID_APP_PRI:
1245 		ice_add_ieee_app_pri_tlv(tlv, dcbcfg);
1246 		break;
1247 	default:
1248 		break;
1249 	}
1250 }
1251 
1252 /**
1253  * ice_dcb_cfg_to_lldp - Convert DCB configuration to MIB format
1254  * @lldpmib: pointer to the HW struct
1255  * @miblen: length of LLDP MIB
1256  * @dcbcfg: Local store which holds the DCB Config
1257  *
1258  * Convert the DCB configuration to MIB format
1259  */
1260 static void
1261 ice_dcb_cfg_to_lldp(u8 *lldpmib, u16 *miblen, struct ice_dcbx_cfg *dcbcfg)
1262 {
1263 	u16 len, offset = 0, tlvid = ICE_TLV_ID_START;
1264 	struct ice_lldp_org_tlv *tlv;
1265 	u16 typelen;
1266 
1267 	tlv = (struct ice_lldp_org_tlv *)lldpmib;
1268 	while (1) {
1269 		ice_add_dcb_tlv(tlv, dcbcfg, tlvid++);
1270 		typelen = ntohs(tlv->typelen);
1271 		len = (typelen & ICE_LLDP_TLV_LEN_M) >> ICE_LLDP_TLV_LEN_S;
1272 		if (len)
1273 			offset += len + 2;
1274 		/* END TLV or beyond LLDPDU size */
1275 		if (tlvid >= ICE_TLV_ID_END_OF_LLDPPDU ||
1276 		    offset > ICE_LLDPDU_SIZE)
1277 			break;
1278 		/* Move to next TLV */
1279 		if (len)
1280 			tlv = (struct ice_lldp_org_tlv *)
1281 				((char *)tlv + sizeof(tlv->typelen) + len);
1282 	}
1283 	*miblen = offset;
1284 }
1285 
1286 /**
1287  * ice_set_dcb_cfg - Set the local LLDP MIB to FW
1288  * @pi: port information structure
1289  *
1290  * Set DCB configuration to the Firmware
1291  */
1292 enum ice_status ice_set_dcb_cfg(struct ice_port_info *pi)
1293 {
1294 	u8 mib_type, *lldpmib = NULL;
1295 	struct ice_dcbx_cfg *dcbcfg;
1296 	enum ice_status ret;
1297 	struct ice_hw *hw;
1298 	u16 miblen;
1299 
1300 	if (!pi)
1301 		return ICE_ERR_PARAM;
1302 
1303 	hw = pi->hw;
1304 
1305 	/* update the HW local config */
1306 	dcbcfg = &pi->local_dcbx_cfg;
1307 	/* Allocate the LLDPDU */
1308 	lldpmib = devm_kzalloc(ice_hw_to_dev(hw), ICE_LLDPDU_SIZE, GFP_KERNEL);
1309 	if (!lldpmib)
1310 		return ICE_ERR_NO_MEMORY;
1311 
1312 	mib_type = SET_LOCAL_MIB_TYPE_LOCAL_MIB;
1313 	if (dcbcfg->app_mode == ICE_DCBX_APPS_NON_WILLING)
1314 		mib_type |= SET_LOCAL_MIB_TYPE_CEE_NON_WILLING;
1315 
1316 	ice_dcb_cfg_to_lldp(lldpmib, &miblen, dcbcfg);
1317 	ret = ice_aq_set_lldp_mib(hw, mib_type, (void *)lldpmib, miblen,
1318 				  NULL);
1319 
1320 	devm_kfree(ice_hw_to_dev(hw), lldpmib);
1321 
1322 	return ret;
1323 }
1324 
1325 /**
1326  * ice_aq_query_port_ets - query port ets configuration
1327  * @pi: port information structure
1328  * @buf: pointer to buffer
1329  * @buf_size: buffer size in bytes
1330  * @cd: pointer to command details structure or NULL
1331  *
1332  * query current port ets configuration
1333  */
1334 static enum ice_status
1335 ice_aq_query_port_ets(struct ice_port_info *pi,
1336 		      struct ice_aqc_port_ets_elem *buf, u16 buf_size,
1337 		      struct ice_sq_cd *cd)
1338 {
1339 	struct ice_aqc_query_port_ets *cmd;
1340 	struct ice_aq_desc desc;
1341 	enum ice_status status;
1342 
1343 	if (!pi)
1344 		return ICE_ERR_PARAM;
1345 	cmd = &desc.params.port_ets;
1346 	ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_query_port_ets);
1347 	cmd->port_teid = pi->root->info.node_teid;
1348 
1349 	status = ice_aq_send_cmd(pi->hw, &desc, buf, buf_size, cd);
1350 	return status;
1351 }
1352 
1353 /**
1354  * ice_update_port_tc_tree_cfg - update TC tree configuration
1355  * @pi: port information structure
1356  * @buf: pointer to buffer
1357  *
1358  * update the SW DB with the new TC changes
1359  */
1360 static enum ice_status
1361 ice_update_port_tc_tree_cfg(struct ice_port_info *pi,
1362 			    struct ice_aqc_port_ets_elem *buf)
1363 {
1364 	struct ice_sched_node *node, *tc_node;
1365 	struct ice_aqc_get_elem elem;
1366 	enum ice_status status = 0;
1367 	u32 teid1, teid2;
1368 	u8 i, j;
1369 
1370 	if (!pi)
1371 		return ICE_ERR_PARAM;
1372 	/* suspend the missing TC nodes */
1373 	for (i = 0; i < pi->root->num_children; i++) {
1374 		teid1 = le32_to_cpu(pi->root->children[i]->info.node_teid);
1375 		ice_for_each_traffic_class(j) {
1376 			teid2 = le32_to_cpu(buf->tc_node_teid[j]);
1377 			if (teid1 == teid2)
1378 				break;
1379 		}
1380 		if (j < ICE_MAX_TRAFFIC_CLASS)
1381 			continue;
1382 		/* TC is missing */
1383 		pi->root->children[i]->in_use = false;
1384 	}
1385 	/* add the new TC nodes */
1386 	ice_for_each_traffic_class(j) {
1387 		teid2 = le32_to_cpu(buf->tc_node_teid[j]);
1388 		if (teid2 == ICE_INVAL_TEID)
1389 			continue;
1390 		/* Is it already present in the tree ? */
1391 		for (i = 0; i < pi->root->num_children; i++) {
1392 			tc_node = pi->root->children[i];
1393 			if (!tc_node)
1394 				continue;
1395 			teid1 = le32_to_cpu(tc_node->info.node_teid);
1396 			if (teid1 == teid2) {
1397 				tc_node->tc_num = j;
1398 				tc_node->in_use = true;
1399 				break;
1400 			}
1401 		}
1402 		if (i < pi->root->num_children)
1403 			continue;
1404 		/* new TC */
1405 		status = ice_sched_query_elem(pi->hw, teid2, &elem);
1406 		if (!status)
1407 			status = ice_sched_add_node(pi, 1, &elem.generic[0]);
1408 		if (status)
1409 			break;
1410 		/* update the TC number */
1411 		node = ice_sched_find_node_by_teid(pi->root, teid2);
1412 		if (node)
1413 			node->tc_num = j;
1414 	}
1415 	return status;
1416 }
1417 
1418 /**
1419  * ice_query_port_ets - query port ets configuration
1420  * @pi: port information structure
1421  * @buf: pointer to buffer
1422  * @buf_size: buffer size in bytes
1423  * @cd: pointer to command details structure or NULL
1424  *
1425  * query current port ets configuration and update the
1426  * SW DB with the TC changes
1427  */
1428 enum ice_status
1429 ice_query_port_ets(struct ice_port_info *pi,
1430 		   struct ice_aqc_port_ets_elem *buf, u16 buf_size,
1431 		   struct ice_sq_cd *cd)
1432 {
1433 	enum ice_status status;
1434 
1435 	mutex_lock(&pi->sched_lock);
1436 	status = ice_aq_query_port_ets(pi, buf, buf_size, cd);
1437 	if (!status)
1438 		status = ice_update_port_tc_tree_cfg(pi, buf);
1439 	mutex_unlock(&pi->sched_lock);
1440 	return status;
1441 }
1442