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 }