GNU Linux-libre 4.9.330-gnu1
[releases.git] / drivers / net / ethernet / intel / i40e / i40e_dcb.c
1 /*******************************************************************************
2  *
3  * Intel Ethernet Controller XL710 Family Linux Driver
4  * Copyright(c) 2013 - 2014 Intel Corporation.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms and conditions of the GNU General Public License,
8  * version 2, as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13  * more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
17  *
18  * The full GNU General Public License is included in this distribution in
19  * the file called "COPYING".
20  *
21  * Contact Information:
22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24  *
25  ******************************************************************************/
26
27 #include "i40e_adminq.h"
28 #include "i40e_prototype.h"
29 #include "i40e_dcb.h"
30
31 /**
32  * i40e_get_dcbx_status
33  * @hw: pointer to the hw struct
34  * @status: Embedded DCBX Engine Status
35  *
36  * Get the DCBX status from the Firmware
37  **/
38 i40e_status i40e_get_dcbx_status(struct i40e_hw *hw, u16 *status)
39 {
40         u32 reg;
41
42         if (!status)
43                 return I40E_ERR_PARAM;
44
45         reg = rd32(hw, I40E_PRTDCB_GENS);
46         *status = (u16)((reg & I40E_PRTDCB_GENS_DCBX_STATUS_MASK) >>
47                         I40E_PRTDCB_GENS_DCBX_STATUS_SHIFT);
48
49         return 0;
50 }
51
52 /**
53  * i40e_parse_ieee_etscfg_tlv
54  * @tlv: IEEE 802.1Qaz ETS CFG TLV
55  * @dcbcfg: Local store to update ETS CFG data
56  *
57  * Parses IEEE 802.1Qaz ETS CFG TLV
58  **/
59 static void i40e_parse_ieee_etscfg_tlv(struct i40e_lldp_org_tlv *tlv,
60                                        struct i40e_dcbx_config *dcbcfg)
61 {
62         struct i40e_dcb_ets_config *etscfg;
63         u8 *buf = tlv->tlvinfo;
64         u16 offset = 0;
65         u8 priority;
66         int i;
67
68         /* First Octet post subtype
69          * --------------------------
70          * |will-|CBS  | Re-  | Max |
71          * |ing  |     |served| TCs |
72          * --------------------------
73          * |1bit | 1bit|3 bits|3bits|
74          */
75         etscfg = &dcbcfg->etscfg;
76         etscfg->willing = (u8)((buf[offset] & I40E_IEEE_ETS_WILLING_MASK) >>
77                                I40E_IEEE_ETS_WILLING_SHIFT);
78         etscfg->cbs = (u8)((buf[offset] & I40E_IEEE_ETS_CBS_MASK) >>
79                            I40E_IEEE_ETS_CBS_SHIFT);
80         etscfg->maxtcs = (u8)((buf[offset] & I40E_IEEE_ETS_MAXTC_MASK) >>
81                               I40E_IEEE_ETS_MAXTC_SHIFT);
82
83         /* Move offset to Priority Assignment Table */
84         offset++;
85
86         /* Priority Assignment Table (4 octets)
87          * Octets:|    1    |    2    |    3    |    4    |
88          *        -----------------------------------------
89          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
90          *        -----------------------------------------
91          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
92          *        -----------------------------------------
93          */
94         for (i = 0; i < 4; i++) {
95                 priority = (u8)((buf[offset] & I40E_IEEE_ETS_PRIO_1_MASK) >>
96                                 I40E_IEEE_ETS_PRIO_1_SHIFT);
97                 etscfg->prioritytable[i * 2] =  priority;
98                 priority = (u8)((buf[offset] & I40E_IEEE_ETS_PRIO_0_MASK) >>
99                                 I40E_IEEE_ETS_PRIO_0_SHIFT);
100                 etscfg->prioritytable[i * 2 + 1] = priority;
101                 offset++;
102         }
103
104         /* TC Bandwidth Table (8 octets)
105          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
106          *        ---------------------------------
107          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
108          *        ---------------------------------
109          */
110         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
111                 etscfg->tcbwtable[i] = buf[offset++];
112
113         /* TSA Assignment Table (8 octets)
114          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
115          *        ---------------------------------
116          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
117          *        ---------------------------------
118          */
119         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
120                 etscfg->tsatable[i] = buf[offset++];
121 }
122
123 /**
124  * i40e_parse_ieee_etsrec_tlv
125  * @tlv: IEEE 802.1Qaz ETS REC TLV
126  * @dcbcfg: Local store to update ETS REC data
127  *
128  * Parses IEEE 802.1Qaz ETS REC TLV
129  **/
130 static void i40e_parse_ieee_etsrec_tlv(struct i40e_lldp_org_tlv *tlv,
131                                        struct i40e_dcbx_config *dcbcfg)
132 {
133         u8 *buf = tlv->tlvinfo;
134         u16 offset = 0;
135         u8 priority;
136         int i;
137
138         /* Move offset to priority table */
139         offset++;
140
141         /* Priority Assignment Table (4 octets)
142          * Octets:|    1    |    2    |    3    |    4    |
143          *        -----------------------------------------
144          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
145          *        -----------------------------------------
146          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
147          *        -----------------------------------------
148          */
149         for (i = 0; i < 4; i++) {
150                 priority = (u8)((buf[offset] & I40E_IEEE_ETS_PRIO_1_MASK) >>
151                                 I40E_IEEE_ETS_PRIO_1_SHIFT);
152                 dcbcfg->etsrec.prioritytable[i*2] =  priority;
153                 priority = (u8)((buf[offset] & I40E_IEEE_ETS_PRIO_0_MASK) >>
154                                 I40E_IEEE_ETS_PRIO_0_SHIFT);
155                 dcbcfg->etsrec.prioritytable[i*2 + 1] = priority;
156                 offset++;
157         }
158
159         /* TC Bandwidth Table (8 octets)
160          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
161          *        ---------------------------------
162          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
163          *        ---------------------------------
164          */
165         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
166                 dcbcfg->etsrec.tcbwtable[i] = buf[offset++];
167
168         /* TSA Assignment Table (8 octets)
169          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
170          *        ---------------------------------
171          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
172          *        ---------------------------------
173          */
174         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
175                 dcbcfg->etsrec.tsatable[i] = buf[offset++];
176 }
177
178 /**
179  * i40e_parse_ieee_pfccfg_tlv
180  * @tlv: IEEE 802.1Qaz PFC CFG TLV
181  * @dcbcfg: Local store to update PFC CFG data
182  *
183  * Parses IEEE 802.1Qaz PFC CFG TLV
184  **/
185 static void i40e_parse_ieee_pfccfg_tlv(struct i40e_lldp_org_tlv *tlv,
186                                        struct i40e_dcbx_config *dcbcfg)
187 {
188         u8 *buf = tlv->tlvinfo;
189
190         /* ----------------------------------------
191          * |will-|MBC  | Re-  | PFC |  PFC Enable  |
192          * |ing  |     |served| cap |              |
193          * -----------------------------------------
194          * |1bit | 1bit|2 bits|4bits| 1 octet      |
195          */
196         dcbcfg->pfc.willing = (u8)((buf[0] & I40E_IEEE_PFC_WILLING_MASK) >>
197                                    I40E_IEEE_PFC_WILLING_SHIFT);
198         dcbcfg->pfc.mbc = (u8)((buf[0] & I40E_IEEE_PFC_MBC_MASK) >>
199                                I40E_IEEE_PFC_MBC_SHIFT);
200         dcbcfg->pfc.pfccap = (u8)((buf[0] & I40E_IEEE_PFC_CAP_MASK) >>
201                                   I40E_IEEE_PFC_CAP_SHIFT);
202         dcbcfg->pfc.pfcenable = buf[1];
203 }
204
205 /**
206  * i40e_parse_ieee_app_tlv
207  * @tlv: IEEE 802.1Qaz APP TLV
208  * @dcbcfg: Local store to update APP PRIO data
209  *
210  * Parses IEEE 802.1Qaz APP PRIO TLV
211  **/
212 static void i40e_parse_ieee_app_tlv(struct i40e_lldp_org_tlv *tlv,
213                                     struct i40e_dcbx_config *dcbcfg)
214 {
215         u16 typelength;
216         u16 offset = 0;
217         u16 length;
218         int i = 0;
219         u8 *buf;
220
221         typelength = ntohs(tlv->typelength);
222         length = (u16)((typelength & I40E_LLDP_TLV_LEN_MASK) >>
223                        I40E_LLDP_TLV_LEN_SHIFT);
224         buf = tlv->tlvinfo;
225
226         /* The App priority table starts 5 octets after TLV header */
227         length -= (sizeof(tlv->ouisubtype) + 1);
228
229         /* Move offset to App Priority Table */
230         offset++;
231
232         /* Application Priority Table (3 octets)
233          * Octets:|         1          |    2    |    3    |
234          *        -----------------------------------------
235          *        |Priority|Rsrvd| Sel |    Protocol ID    |
236          *        -----------------------------------------
237          *   Bits:|23    21|20 19|18 16|15                0|
238          *        -----------------------------------------
239          */
240         while (offset < length) {
241                 dcbcfg->app[i].priority = (u8)((buf[offset] &
242                                                 I40E_IEEE_APP_PRIO_MASK) >>
243                                                I40E_IEEE_APP_PRIO_SHIFT);
244                 dcbcfg->app[i].selector = (u8)((buf[offset] &
245                                                 I40E_IEEE_APP_SEL_MASK) >>
246                                                I40E_IEEE_APP_SEL_SHIFT);
247                 dcbcfg->app[i].protocolid = (buf[offset + 1] << 0x8) |
248                                              buf[offset + 2];
249                 /* Move to next app */
250                 offset += 3;
251                 i++;
252                 if (i >= I40E_DCBX_MAX_APPS)
253                         break;
254         }
255
256         dcbcfg->numapps = i;
257 }
258
259 /**
260  * i40e_parse_ieee_etsrec_tlv
261  * @tlv: IEEE 802.1Qaz TLV
262  * @dcbcfg: Local store to update ETS REC data
263  *
264  * Get the TLV subtype and send it to parsing function
265  * based on the subtype value
266  **/
267 static void i40e_parse_ieee_tlv(struct i40e_lldp_org_tlv *tlv,
268                                 struct i40e_dcbx_config *dcbcfg)
269 {
270         u32 ouisubtype;
271         u8 subtype;
272
273         ouisubtype = ntohl(tlv->ouisubtype);
274         subtype = (u8)((ouisubtype & I40E_LLDP_TLV_SUBTYPE_MASK) >>
275                        I40E_LLDP_TLV_SUBTYPE_SHIFT);
276         switch (subtype) {
277         case I40E_IEEE_SUBTYPE_ETS_CFG:
278                 i40e_parse_ieee_etscfg_tlv(tlv, dcbcfg);
279                 break;
280         case I40E_IEEE_SUBTYPE_ETS_REC:
281                 i40e_parse_ieee_etsrec_tlv(tlv, dcbcfg);
282                 break;
283         case I40E_IEEE_SUBTYPE_PFC_CFG:
284                 i40e_parse_ieee_pfccfg_tlv(tlv, dcbcfg);
285                 break;
286         case I40E_IEEE_SUBTYPE_APP_PRI:
287                 i40e_parse_ieee_app_tlv(tlv, dcbcfg);
288                 break;
289         default:
290                 break;
291         }
292 }
293
294 /**
295  * i40e_parse_cee_pgcfg_tlv
296  * @tlv: CEE DCBX PG CFG TLV
297  * @dcbcfg: Local store to update ETS CFG data
298  *
299  * Parses CEE DCBX PG CFG TLV
300  **/
301 static void i40e_parse_cee_pgcfg_tlv(struct i40e_cee_feat_tlv *tlv,
302                                      struct i40e_dcbx_config *dcbcfg)
303 {
304         struct i40e_dcb_ets_config *etscfg;
305         u8 *buf = tlv->tlvinfo;
306         u16 offset = 0;
307         u8 priority;
308         int i;
309
310         etscfg = &dcbcfg->etscfg;
311
312         if (tlv->en_will_err & I40E_CEE_FEAT_TLV_WILLING_MASK)
313                 etscfg->willing = 1;
314
315         etscfg->cbs = 0;
316         /* Priority Group Table (4 octets)
317          * Octets:|    1    |    2    |    3    |    4    |
318          *        -----------------------------------------
319          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
320          *        -----------------------------------------
321          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
322          *        -----------------------------------------
323          */
324         for (i = 0; i < 4; i++) {
325                 priority = (u8)((buf[offset] & I40E_CEE_PGID_PRIO_1_MASK) >>
326                                  I40E_CEE_PGID_PRIO_1_SHIFT);
327                 etscfg->prioritytable[i * 2] =  priority;
328                 priority = (u8)((buf[offset] & I40E_CEE_PGID_PRIO_0_MASK) >>
329                                  I40E_CEE_PGID_PRIO_0_SHIFT);
330                 etscfg->prioritytable[i * 2 + 1] = priority;
331                 offset++;
332         }
333
334         /* PG Percentage Table (8 octets)
335          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
336          *        ---------------------------------
337          *        |pg0|pg1|pg2|pg3|pg4|pg5|pg6|pg7|
338          *        ---------------------------------
339          */
340         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
341                 etscfg->tcbwtable[i] = buf[offset++];
342
343         /* Number of TCs supported (1 octet) */
344         etscfg->maxtcs = buf[offset];
345 }
346
347 /**
348  * i40e_parse_cee_pfccfg_tlv
349  * @tlv: CEE DCBX PFC CFG TLV
350  * @dcbcfg: Local store to update PFC CFG data
351  *
352  * Parses CEE DCBX PFC CFG TLV
353  **/
354 static void i40e_parse_cee_pfccfg_tlv(struct i40e_cee_feat_tlv *tlv,
355                                       struct i40e_dcbx_config *dcbcfg)
356 {
357         u8 *buf = tlv->tlvinfo;
358
359         if (tlv->en_will_err & I40E_CEE_FEAT_TLV_WILLING_MASK)
360                 dcbcfg->pfc.willing = 1;
361
362         /* ------------------------
363          * | PFC Enable | PFC TCs |
364          * ------------------------
365          * | 1 octet    | 1 octet |
366          */
367         dcbcfg->pfc.pfcenable = buf[0];
368         dcbcfg->pfc.pfccap = buf[1];
369 }
370
371 /**
372  * i40e_parse_cee_app_tlv
373  * @tlv: CEE DCBX APP TLV
374  * @dcbcfg: Local store to update APP PRIO data
375  *
376  * Parses CEE DCBX APP PRIO TLV
377  **/
378 static void i40e_parse_cee_app_tlv(struct i40e_cee_feat_tlv *tlv,
379                                    struct i40e_dcbx_config *dcbcfg)
380 {
381         u16 length, typelength, offset = 0;
382         struct i40e_cee_app_prio *app;
383         u8 i;
384
385         typelength = ntohs(tlv->hdr.typelen);
386         length = (u16)((typelength & I40E_LLDP_TLV_LEN_MASK) >>
387                        I40E_LLDP_TLV_LEN_SHIFT);
388
389         dcbcfg->numapps = length / sizeof(*app);
390
391         if (!dcbcfg->numapps)
392                 return;
393
394         for (i = 0; i < dcbcfg->numapps; i++) {
395                 u8 up, selector;
396
397                 app = (struct i40e_cee_app_prio *)(tlv->tlvinfo + offset);
398                 for (up = 0; up < I40E_MAX_USER_PRIORITY; up++) {
399                         if (app->prio_map & BIT(up))
400                                 break;
401                 }
402                 dcbcfg->app[i].priority = up;
403
404                 /* Get Selector from lower 2 bits, and convert to IEEE */
405                 selector = (app->upper_oui_sel & I40E_CEE_APP_SELECTOR_MASK);
406                 switch (selector) {
407                 case I40E_CEE_APP_SEL_ETHTYPE:
408                         dcbcfg->app[i].selector = I40E_APP_SEL_ETHTYPE;
409                         break;
410                 case I40E_CEE_APP_SEL_TCPIP:
411                         dcbcfg->app[i].selector = I40E_APP_SEL_TCPIP;
412                         break;
413                 default:
414                         /* Keep selector as it is for unknown types */
415                         dcbcfg->app[i].selector = selector;
416                 }
417
418                 dcbcfg->app[i].protocolid = ntohs(app->protocol);
419                 /* Move to next app */
420                 offset += sizeof(*app);
421         }
422 }
423
424 /**
425  * i40e_parse_cee_tlv
426  * @tlv: CEE DCBX TLV
427  * @dcbcfg: Local store to update DCBX config data
428  *
429  * Get the TLV subtype and send it to parsing function
430  * based on the subtype value
431  **/
432 static void i40e_parse_cee_tlv(struct i40e_lldp_org_tlv *tlv,
433                                struct i40e_dcbx_config *dcbcfg)
434 {
435         u16 len, tlvlen, sublen, typelength;
436         struct i40e_cee_feat_tlv *sub_tlv;
437         u8 subtype, feat_tlv_count = 0;
438         u32 ouisubtype;
439
440         ouisubtype = ntohl(tlv->ouisubtype);
441         subtype = (u8)((ouisubtype & I40E_LLDP_TLV_SUBTYPE_MASK) >>
442                        I40E_LLDP_TLV_SUBTYPE_SHIFT);
443         /* Return if not CEE DCBX */
444         if (subtype != I40E_CEE_DCBX_TYPE)
445                 return;
446
447         typelength = ntohs(tlv->typelength);
448         tlvlen = (u16)((typelength & I40E_LLDP_TLV_LEN_MASK) >>
449                         I40E_LLDP_TLV_LEN_SHIFT);
450         len = sizeof(tlv->typelength) + sizeof(ouisubtype) +
451               sizeof(struct i40e_cee_ctrl_tlv);
452         /* Return if no CEE DCBX Feature TLVs */
453         if (tlvlen <= len)
454                 return;
455
456         sub_tlv = (struct i40e_cee_feat_tlv *)((char *)tlv + len);
457         while (feat_tlv_count < I40E_CEE_MAX_FEAT_TYPE) {
458                 typelength = ntohs(sub_tlv->hdr.typelen);
459                 sublen = (u16)((typelength &
460                                 I40E_LLDP_TLV_LEN_MASK) >>
461                                 I40E_LLDP_TLV_LEN_SHIFT);
462                 subtype = (u8)((typelength & I40E_LLDP_TLV_TYPE_MASK) >>
463                                 I40E_LLDP_TLV_TYPE_SHIFT);
464                 switch (subtype) {
465                 case I40E_CEE_SUBTYPE_PG_CFG:
466                         i40e_parse_cee_pgcfg_tlv(sub_tlv, dcbcfg);
467                         break;
468                 case I40E_CEE_SUBTYPE_PFC_CFG:
469                         i40e_parse_cee_pfccfg_tlv(sub_tlv, dcbcfg);
470                         break;
471                 case I40E_CEE_SUBTYPE_APP_PRI:
472                         i40e_parse_cee_app_tlv(sub_tlv, dcbcfg);
473                         break;
474                 default:
475                         return; /* Invalid Sub-type return */
476                 }
477                 feat_tlv_count++;
478                 /* Move to next sub TLV */
479                 sub_tlv = (struct i40e_cee_feat_tlv *)((char *)sub_tlv +
480                                                 sizeof(sub_tlv->hdr.typelen) +
481                                                 sublen);
482         }
483 }
484
485 /**
486  * i40e_parse_org_tlv
487  * @tlv: Organization specific TLV
488  * @dcbcfg: Local store to update ETS REC data
489  *
490  * Currently only IEEE 802.1Qaz TLV is supported, all others
491  * will be returned
492  **/
493 static void i40e_parse_org_tlv(struct i40e_lldp_org_tlv *tlv,
494                                struct i40e_dcbx_config *dcbcfg)
495 {
496         u32 ouisubtype;
497         u32 oui;
498
499         ouisubtype = ntohl(tlv->ouisubtype);
500         oui = (u32)((ouisubtype & I40E_LLDP_TLV_OUI_MASK) >>
501                     I40E_LLDP_TLV_OUI_SHIFT);
502         switch (oui) {
503         case I40E_IEEE_8021QAZ_OUI:
504                 i40e_parse_ieee_tlv(tlv, dcbcfg);
505                 break;
506         case I40E_CEE_DCBX_OUI:
507                 i40e_parse_cee_tlv(tlv, dcbcfg);
508                 break;
509         default:
510                 break;
511         }
512 }
513
514 /**
515  * i40e_lldp_to_dcb_config
516  * @lldpmib: LLDPDU to be parsed
517  * @dcbcfg: store for LLDPDU data
518  *
519  * Parse DCB configuration from the LLDPDU
520  **/
521 i40e_status i40e_lldp_to_dcb_config(u8 *lldpmib,
522                                     struct i40e_dcbx_config *dcbcfg)
523 {
524         i40e_status ret = 0;
525         struct i40e_lldp_org_tlv *tlv;
526         u16 type;
527         u16 length;
528         u16 typelength;
529         u16 offset = 0;
530
531         if (!lldpmib || !dcbcfg)
532                 return I40E_ERR_PARAM;
533
534         /* set to the start of LLDPDU */
535         lldpmib += ETH_HLEN;
536         tlv = (struct i40e_lldp_org_tlv *)lldpmib;
537         while (1) {
538                 typelength = ntohs(tlv->typelength);
539                 type = (u16)((typelength & I40E_LLDP_TLV_TYPE_MASK) >>
540                              I40E_LLDP_TLV_TYPE_SHIFT);
541                 length = (u16)((typelength & I40E_LLDP_TLV_LEN_MASK) >>
542                                I40E_LLDP_TLV_LEN_SHIFT);
543                 offset += sizeof(typelength) + length;
544
545                 /* END TLV or beyond LLDPDU size */
546                 if ((type == I40E_TLV_TYPE_END) || (offset > I40E_LLDPDU_SIZE))
547                         break;
548
549                 switch (type) {
550                 case I40E_TLV_TYPE_ORG:
551                         i40e_parse_org_tlv(tlv, dcbcfg);
552                         break;
553                 default:
554                         break;
555                 }
556
557                 /* Move to next TLV */
558                 tlv = (struct i40e_lldp_org_tlv *)((char *)tlv +
559                                                     sizeof(tlv->typelength) +
560                                                     length);
561         }
562
563         return ret;
564 }
565
566 /**
567  * i40e_aq_get_dcb_config
568  * @hw: pointer to the hw struct
569  * @mib_type: mib type for the query
570  * @bridgetype: bridge type for the query (remote)
571  * @dcbcfg: store for LLDPDU data
572  *
573  * Query DCB configuration from the Firmware
574  **/
575 i40e_status i40e_aq_get_dcb_config(struct i40e_hw *hw, u8 mib_type,
576                                    u8 bridgetype,
577                                    struct i40e_dcbx_config *dcbcfg)
578 {
579         i40e_status ret = 0;
580         struct i40e_virt_mem mem;
581         u8 *lldpmib;
582
583         /* Allocate the LLDPDU */
584         ret = i40e_allocate_virt_mem(hw, &mem, I40E_LLDPDU_SIZE);
585         if (ret)
586                 return ret;
587
588         lldpmib = (u8 *)mem.va;
589         ret = i40e_aq_get_lldp_mib(hw, bridgetype, mib_type,
590                                    (void *)lldpmib, I40E_LLDPDU_SIZE,
591                                    NULL, NULL, NULL);
592         if (ret)
593                 goto free_mem;
594
595         /* Parse LLDP MIB to get dcb configuration */
596         ret = i40e_lldp_to_dcb_config(lldpmib, dcbcfg);
597
598 free_mem:
599         i40e_free_virt_mem(hw, &mem);
600         return ret;
601 }
602
603 /**
604  * i40e_cee_to_dcb_v1_config
605  * @cee_cfg: pointer to CEE v1 response configuration struct
606  * @dcbcfg: DCB configuration struct
607  *
608  * Convert CEE v1 configuration from firmware to DCB configuration
609  **/
610 static void i40e_cee_to_dcb_v1_config(
611                         struct i40e_aqc_get_cee_dcb_cfg_v1_resp *cee_cfg,
612                         struct i40e_dcbx_config *dcbcfg)
613 {
614         u16 status, tlv_status = le16_to_cpu(cee_cfg->tlv_status);
615         u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
616         u8 i, tc, err;
617
618         /* CEE PG data to ETS config */
619         dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;
620
621         for (i = 0; i < 4; i++) {
622                 tc = (u8)((cee_cfg->oper_prio_tc[i] &
623                          I40E_CEE_PGID_PRIO_1_MASK) >>
624                          I40E_CEE_PGID_PRIO_1_SHIFT);
625                 dcbcfg->etscfg.prioritytable[i*2] =  tc;
626                 tc = (u8)((cee_cfg->oper_prio_tc[i] &
627                          I40E_CEE_PGID_PRIO_0_MASK) >>
628                          I40E_CEE_PGID_PRIO_0_SHIFT);
629                 dcbcfg->etscfg.prioritytable[i*2 + 1] = tc;
630         }
631
632         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
633                 dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];
634
635         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
636                 if (dcbcfg->etscfg.prioritytable[i] == I40E_CEE_PGID_STRICT) {
637                         /* Map it to next empty TC */
638                         dcbcfg->etscfg.prioritytable[i] =
639                                                 cee_cfg->oper_num_tc - 1;
640                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_STRICT;
641                 } else {
642                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_ETS;
643                 }
644         }
645
646         /* CEE PFC data to ETS config */
647         dcbcfg->pfc.pfcenable = cee_cfg->oper_pfc_en;
648         dcbcfg->pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
649
650         status = (tlv_status & I40E_AQC_CEE_APP_STATUS_MASK) >>
651                   I40E_AQC_CEE_APP_STATUS_SHIFT;
652         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
653         /* Add APPs if Error is False */
654         if (!err) {
655                 /* CEE operating configuration supports FCoE/iSCSI/FIP only */
656                 dcbcfg->numapps = I40E_CEE_OPER_MAX_APPS;
657
658                 /* FCoE APP */
659                 dcbcfg->app[0].priority =
660                         (app_prio & I40E_AQC_CEE_APP_FCOE_MASK) >>
661                          I40E_AQC_CEE_APP_FCOE_SHIFT;
662                 dcbcfg->app[0].selector = I40E_APP_SEL_ETHTYPE;
663                 dcbcfg->app[0].protocolid = I40E_APP_PROTOID_FCOE;
664
665                 /* iSCSI APP */
666                 dcbcfg->app[1].priority =
667                         (app_prio & I40E_AQC_CEE_APP_ISCSI_MASK) >>
668                          I40E_AQC_CEE_APP_ISCSI_SHIFT;
669                 dcbcfg->app[1].selector = I40E_APP_SEL_TCPIP;
670                 dcbcfg->app[1].protocolid = I40E_APP_PROTOID_ISCSI;
671
672                 /* FIP APP */
673                 dcbcfg->app[2].priority =
674                         (app_prio & I40E_AQC_CEE_APP_FIP_MASK) >>
675                          I40E_AQC_CEE_APP_FIP_SHIFT;
676                 dcbcfg->app[2].selector = I40E_APP_SEL_ETHTYPE;
677                 dcbcfg->app[2].protocolid = I40E_APP_PROTOID_FIP;
678         }
679 }
680
681 /**
682  * i40e_cee_to_dcb_config
683  * @cee_cfg: pointer to CEE configuration struct
684  * @dcbcfg: DCB configuration struct
685  *
686  * Convert CEE configuration from firmware to DCB configuration
687  **/
688 static void i40e_cee_to_dcb_config(
689                                 struct i40e_aqc_get_cee_dcb_cfg_resp *cee_cfg,
690                                 struct i40e_dcbx_config *dcbcfg)
691 {
692         u32 status, tlv_status = le32_to_cpu(cee_cfg->tlv_status);
693         u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
694         u8 i, tc, err, sync, oper;
695
696         /* CEE PG data to ETS config */
697         dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;
698
699         /* Note that the FW creates the oper_prio_tc nibbles reversed
700          * from those in the CEE Priority Group sub-TLV.
701          */
702         for (i = 0; i < 4; i++) {
703                 tc = (u8)((cee_cfg->oper_prio_tc[i] &
704                          I40E_CEE_PGID_PRIO_0_MASK) >>
705                          I40E_CEE_PGID_PRIO_0_SHIFT);
706                 dcbcfg->etscfg.prioritytable[i * 2] =  tc;
707                 tc = (u8)((cee_cfg->oper_prio_tc[i] &
708                          I40E_CEE_PGID_PRIO_1_MASK) >>
709                          I40E_CEE_PGID_PRIO_1_SHIFT);
710                 dcbcfg->etscfg.prioritytable[i * 2 + 1] = tc;
711         }
712
713         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
714                 dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];
715
716         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
717                 if (dcbcfg->etscfg.prioritytable[i] == I40E_CEE_PGID_STRICT) {
718                         /* Map it to next empty TC */
719                         dcbcfg->etscfg.prioritytable[i] =
720                                                 cee_cfg->oper_num_tc - 1;
721                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_STRICT;
722                 } else {
723                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_ETS;
724                 }
725         }
726
727         /* CEE PFC data to ETS config */
728         dcbcfg->pfc.pfcenable = cee_cfg->oper_pfc_en;
729         dcbcfg->pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
730
731         i = 0;
732         status = (tlv_status & I40E_AQC_CEE_FCOE_STATUS_MASK) >>
733                   I40E_AQC_CEE_FCOE_STATUS_SHIFT;
734         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
735         sync = (status & I40E_TLV_STATUS_SYNC) ? 1 : 0;
736         oper = (status & I40E_TLV_STATUS_OPER) ? 1 : 0;
737         /* Add FCoE APP if Error is False and Oper/Sync is True */
738         if (!err && sync && oper) {
739                 /* FCoE APP */
740                 dcbcfg->app[i].priority =
741                         (app_prio & I40E_AQC_CEE_APP_FCOE_MASK) >>
742                          I40E_AQC_CEE_APP_FCOE_SHIFT;
743                 dcbcfg->app[i].selector = I40E_APP_SEL_ETHTYPE;
744                 dcbcfg->app[i].protocolid = I40E_APP_PROTOID_FCOE;
745                 i++;
746         }
747
748         status = (tlv_status & I40E_AQC_CEE_ISCSI_STATUS_MASK) >>
749                   I40E_AQC_CEE_ISCSI_STATUS_SHIFT;
750         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
751         sync = (status & I40E_TLV_STATUS_SYNC) ? 1 : 0;
752         oper = (status & I40E_TLV_STATUS_OPER) ? 1 : 0;
753         /* Add iSCSI APP if Error is False and Oper/Sync is True */
754         if (!err && sync && oper) {
755                 /* iSCSI APP */
756                 dcbcfg->app[i].priority =
757                         (app_prio & I40E_AQC_CEE_APP_ISCSI_MASK) >>
758                          I40E_AQC_CEE_APP_ISCSI_SHIFT;
759                 dcbcfg->app[i].selector = I40E_APP_SEL_TCPIP;
760                 dcbcfg->app[i].protocolid = I40E_APP_PROTOID_ISCSI;
761                 i++;
762         }
763
764         status = (tlv_status & I40E_AQC_CEE_FIP_STATUS_MASK) >>
765                   I40E_AQC_CEE_FIP_STATUS_SHIFT;
766         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
767         sync = (status & I40E_TLV_STATUS_SYNC) ? 1 : 0;
768         oper = (status & I40E_TLV_STATUS_OPER) ? 1 : 0;
769         /* Add FIP APP if Error is False and Oper/Sync is True */
770         if (!err && sync && oper) {
771                 /* FIP APP */
772                 dcbcfg->app[i].priority =
773                         (app_prio & I40E_AQC_CEE_APP_FIP_MASK) >>
774                          I40E_AQC_CEE_APP_FIP_SHIFT;
775                 dcbcfg->app[i].selector = I40E_APP_SEL_ETHTYPE;
776                 dcbcfg->app[i].protocolid = I40E_APP_PROTOID_FIP;
777                 i++;
778         }
779         dcbcfg->numapps = i;
780 }
781
782 /**
783  * i40e_get_ieee_dcb_config
784  * @hw: pointer to the hw struct
785  *
786  * Get IEEE mode DCB configuration from the Firmware
787  **/
788 static i40e_status i40e_get_ieee_dcb_config(struct i40e_hw *hw)
789 {
790         i40e_status ret = 0;
791
792         /* IEEE mode */
793         hw->local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_IEEE;
794         /* Get Local DCB Config */
795         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_LOCAL, 0,
796                                      &hw->local_dcbx_config);
797         if (ret)
798                 goto out;
799
800         /* Get Remote DCB Config */
801         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
802                                      I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
803                                      &hw->remote_dcbx_config);
804         /* Don't treat ENOENT as an error for Remote MIBs */
805         if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT)
806                 ret = 0;
807
808 out:
809         return ret;
810 }
811
812 /**
813  * i40e_get_dcb_config
814  * @hw: pointer to the hw struct
815  *
816  * Get DCB configuration from the Firmware
817  **/
818 i40e_status i40e_get_dcb_config(struct i40e_hw *hw)
819 {
820         i40e_status ret = 0;
821         struct i40e_aqc_get_cee_dcb_cfg_resp cee_cfg;
822         struct i40e_aqc_get_cee_dcb_cfg_v1_resp cee_v1_cfg;
823
824         /* If Firmware version < v4.33 on X710/XL710, IEEE only */
825         if ((hw->mac.type == I40E_MAC_XL710) &&
826             (((hw->aq.fw_maj_ver == 4) && (hw->aq.fw_min_ver < 33)) ||
827               (hw->aq.fw_maj_ver < 4)))
828                 return i40e_get_ieee_dcb_config(hw);
829
830         /* If Firmware version == v4.33 on X710/XL710, use old CEE struct */
831         if ((hw->mac.type == I40E_MAC_XL710) &&
832             ((hw->aq.fw_maj_ver == 4) && (hw->aq.fw_min_ver == 33))) {
833                 ret = i40e_aq_get_cee_dcb_config(hw, &cee_v1_cfg,
834                                                  sizeof(cee_v1_cfg), NULL);
835                 if (!ret) {
836                         /* CEE mode */
837                         hw->local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_CEE;
838                         hw->local_dcbx_config.tlv_status =
839                                         le16_to_cpu(cee_v1_cfg.tlv_status);
840                         i40e_cee_to_dcb_v1_config(&cee_v1_cfg,
841                                                   &hw->local_dcbx_config);
842                 }
843         } else {
844                 ret = i40e_aq_get_cee_dcb_config(hw, &cee_cfg,
845                                                  sizeof(cee_cfg), NULL);
846                 if (!ret) {
847                         /* CEE mode */
848                         hw->local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_CEE;
849                         hw->local_dcbx_config.tlv_status =
850                                         le32_to_cpu(cee_cfg.tlv_status);
851                         i40e_cee_to_dcb_config(&cee_cfg,
852                                                &hw->local_dcbx_config);
853                 }
854         }
855
856         /* CEE mode not enabled try querying IEEE data */
857         if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT)
858                 return i40e_get_ieee_dcb_config(hw);
859
860         if (ret)
861                 goto out;
862
863         /* Get CEE DCB Desired Config */
864         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_LOCAL, 0,
865                                      &hw->desired_dcbx_config);
866         if (ret)
867                 goto out;
868
869         /* Get Remote DCB Config */
870         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
871                                      I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
872                                      &hw->remote_dcbx_config);
873         /* Don't treat ENOENT as an error for Remote MIBs */
874         if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT)
875                 ret = 0;
876
877 out:
878         return ret;
879 }
880
881 /**
882  * i40e_init_dcb
883  * @hw: pointer to the hw struct
884  *
885  * Update DCB configuration from the Firmware
886  **/
887 i40e_status i40e_init_dcb(struct i40e_hw *hw)
888 {
889         i40e_status ret = 0;
890         struct i40e_lldp_variables lldp_cfg;
891         u8 adminstatus = 0;
892
893         if (!hw->func_caps.dcb)
894                 return ret;
895
896         /* Read LLDP NVM area */
897         ret = i40e_read_lldp_cfg(hw, &lldp_cfg);
898         if (ret)
899                 return ret;
900
901         /* Get the LLDP AdminStatus for the current port */
902         adminstatus = lldp_cfg.adminstatus >> (hw->port * 4);
903         adminstatus &= 0xF;
904
905         /* LLDP agent disabled */
906         if (!adminstatus) {
907                 hw->dcbx_status = I40E_DCBX_STATUS_DISABLED;
908                 return ret;
909         }
910
911         /* Get DCBX status */
912         ret = i40e_get_dcbx_status(hw, &hw->dcbx_status);
913         if (ret)
914                 return ret;
915
916         /* Check the DCBX Status */
917         switch (hw->dcbx_status) {
918         case I40E_DCBX_STATUS_DONE:
919         case I40E_DCBX_STATUS_IN_PROGRESS:
920                 /* Get current DCBX configuration */
921                 ret = i40e_get_dcb_config(hw);
922                 if (ret)
923                         return ret;
924                 break;
925         case I40E_DCBX_STATUS_DISABLED:
926                 return ret;
927         case I40E_DCBX_STATUS_NOT_STARTED:
928         case I40E_DCBX_STATUS_MULTIPLE_PEERS:
929         default:
930                 break;
931         }
932
933         /* Configure the LLDP MIB change event */
934         ret = i40e_aq_cfg_lldp_mib_change_event(hw, true, NULL);
935         if (ret)
936                 return ret;
937
938         return ret;
939 }
940
941 /**
942  * i40e_read_lldp_cfg - read LLDP Configuration data from NVM
943  * @hw: pointer to the HW structure
944  * @lldp_cfg: pointer to hold lldp configuration variables
945  *
946  * Reads the LLDP configuration data from NVM
947  **/
948 i40e_status i40e_read_lldp_cfg(struct i40e_hw *hw,
949                                struct i40e_lldp_variables *lldp_cfg)
950 {
951         i40e_status ret = 0;
952         u32 offset = (2 * I40E_NVM_LLDP_CFG_PTR);
953
954         if (!lldp_cfg)
955                 return I40E_ERR_PARAM;
956
957         ret = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
958         if (ret)
959                 goto err_lldp_cfg;
960
961         ret = i40e_aq_read_nvm(hw, I40E_SR_EMP_MODULE_PTR, offset,
962                                sizeof(struct i40e_lldp_variables),
963                                (u8 *)lldp_cfg,
964                                true, NULL);
965         i40e_release_nvm(hw);
966
967 err_lldp_cfg:
968         return ret;
969 }