drivers/net/ethernet/intel/i40e/i40e_dcb.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2021 Intel Corporation. */
   3
   4 #include <linux/bitfield.h>
   5 #include "i40e_adminq.h"
   6 #include "i40e_alloc.h"
   7 #include "i40e_dcb.h"
   8 #include "i40e_prototype.h"
   9
  10 /**
  11  * i40e_get_dcbx_status
  12  * @hw: pointer to the hw struct
  13  * @status: Embedded DCBX Engine Status
  14  *
  15  * Get the DCBX status from the Firmware
  16  **/
  17 int i40e_get_dcbx_status(struct i40e_hw *hw, u16 *status)
  18 {
  19         u32 reg;
  20
  21         if (!status)
  22                 return -EINVAL;
  23
  24         reg = rd32(hw, I40E_PRTDCB_GENS);
  25         *status = FIELD_GET(I40E_PRTDCB_GENS_DCBX_STATUS_MASK, reg);
  26
  27         return 0;
  28 }
  29
  30 /**
  31  * i40e_parse_ieee_etscfg_tlv
  32  * @tlv: IEEE 802.1Qaz ETS CFG TLV
  33  * @dcbcfg: Local store to update ETS CFG data
  34  *
  35  * Parses IEEE 802.1Qaz ETS CFG TLV
  36  **/
  37 static void i40e_parse_ieee_etscfg_tlv(struct i40e_lldp_org_tlv *tlv,
  38                                        struct i40e_dcbx_config *dcbcfg)
  39 {
  40         struct i40e_dcb_ets_config *etscfg;
  41         u8 *buf = tlv->tlvinfo;
  42         u16 offset = 0;
  43         u8 priority;
  44         int i;
  45
  46         /* First Octet post subtype
  47          * --------------------------
  48          * |will-|CBS  | Re-  | Max |
  49          * |ing  |     |served| TCs |
  50          * --------------------------
  51          * |1bit | 1bit|3 bits|3bits|
  52          */
  53         etscfg = &dcbcfg->etscfg;
  54         etscfg->willing = FIELD_GET(I40E_IEEE_ETS_WILLING_MASK, buf[offset]);
  55         etscfg->cbs = FIELD_GET(I40E_IEEE_ETS_CBS_MASK, buf[offset]);
  56         etscfg->maxtcs = FIELD_GET(I40E_IEEE_ETS_MAXTC_MASK, buf[offset]);
  57
  58         /* Move offset to Priority Assignment Table */
  59         offset++;
  60
  61         /* Priority Assignment Table (4 octets)
  62          * Octets:|    1    |    2    |    3    |    4    |
  63          *        -----------------------------------------
  64          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
  65          *        -----------------------------------------
  66          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
  67          *        -----------------------------------------
  68          */
  69         for (i = 0; i < 4; i++) {
  70                 priority = FIELD_GET(I40E_IEEE_ETS_PRIO_1_MASK, buf[offset]);
  71                 etscfg->prioritytable[i * 2] = priority;
  72                 priority = FIELD_GET(I40E_IEEE_ETS_PRIO_0_MASK, buf[offset]);
  73                 etscfg->prioritytable[i * 2 + 1] = priority;
  74                 offset++;
  75         }
  76
  77         /* TC Bandwidth Table (8 octets)
  78          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
  79          *        ---------------------------------
  80          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
  81          *        ---------------------------------
  82          */
  83         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
  84                 etscfg->tcbwtable[i] = buf[offset++];
  85
  86         /* TSA Assignment Table (8 octets)
  87          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
  88          *        ---------------------------------
  89          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
  90          *        ---------------------------------
  91          */
  92         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
  93                 etscfg->tsatable[i] = buf[offset++];
  94 }
  95
  96 /**
  97  * i40e_parse_ieee_etsrec_tlv
  98  * @tlv: IEEE 802.1Qaz ETS REC TLV
  99  * @dcbcfg: Local store to update ETS REC data
 100  *
 101  * Parses IEEE 802.1Qaz ETS REC TLV
 102  **/
 103 static void i40e_parse_ieee_etsrec_tlv(struct i40e_lldp_org_tlv *tlv,
 104                                        struct i40e_dcbx_config *dcbcfg)
 105 {
 106         u8 *buf = tlv->tlvinfo;
 107         u16 offset = 0;
 108         u8 priority;
 109         int i;
 110
 111         /* Move offset to priority table */
 112         offset++;
 113
 114         /* Priority Assignment Table (4 octets)
 115          * Octets:|    1    |    2    |    3    |    4    |
 116          *        -----------------------------------------
 117          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
 118          *        -----------------------------------------
 119          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
 120          *        -----------------------------------------
 121          */
 122         for (i = 0; i < 4; i++) {
 123                 priority = FIELD_GET(I40E_IEEE_ETS_PRIO_1_MASK, buf[offset]);
 124                 dcbcfg->etsrec.prioritytable[i * 2] = priority;
 125                 priority = FIELD_GET(I40E_IEEE_ETS_PRIO_0_MASK, buf[offset]);
 126                 dcbcfg->etsrec.prioritytable[(i * 2) + 1] = priority;
 127                 offset++;
 128         }
 129
 130         /* TC Bandwidth Table (8 octets)
 131          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
 132          *        ---------------------------------
 133          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
 134          *        ---------------------------------
 135          */
 136         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
 137                 dcbcfg->etsrec.tcbwtable[i] = buf[offset++];
 138
 139         /* TSA Assignment Table (8 octets)
 140          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
 141          *        ---------------------------------
 142          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
 143          *        ---------------------------------
 144          */
 145         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
 146                 dcbcfg->etsrec.tsatable[i] = buf[offset++];
 147 }
 148
 149 /**
 150  * i40e_parse_ieee_pfccfg_tlv
 151  * @tlv: IEEE 802.1Qaz PFC CFG TLV
 152  * @dcbcfg: Local store to update PFC CFG data
 153  *
 154  * Parses IEEE 802.1Qaz PFC CFG TLV
 155  **/
 156 static void i40e_parse_ieee_pfccfg_tlv(struct i40e_lldp_org_tlv *tlv,
 157                                        struct i40e_dcbx_config *dcbcfg)
 158 {
 159         u8 *buf = tlv->tlvinfo;
 160
 161         /* ----------------------------------------
 162          * |will-|MBC  | Re-  | PFC |  PFC Enable  |
 163          * |ing  |     |served| cap |              |
 164          * -----------------------------------------
 165          * |1bit | 1bit|2 bits|4bits| 1 octet      |
 166          */
 167         dcbcfg->pfc.willing = FIELD_GET(I40E_IEEE_PFC_WILLING_MASK, buf[0]);
 168         dcbcfg->pfc.mbc = FIELD_GET(I40E_IEEE_PFC_MBC_MASK, buf[0]);
 169         dcbcfg->pfc.pfccap = FIELD_GET(I40E_IEEE_PFC_CAP_MASK, buf[0]);
 170         dcbcfg->pfc.pfcenable = buf[1];
 171 }
 172
 173 /**
 174  * i40e_parse_ieee_app_tlv
 175  * @tlv: IEEE 802.1Qaz APP TLV
 176  * @dcbcfg: Local store to update APP PRIO data
 177  *
 178  * Parses IEEE 802.1Qaz APP PRIO TLV
 179  **/
 180 static void i40e_parse_ieee_app_tlv(struct i40e_lldp_org_tlv *tlv,
 181                                     struct i40e_dcbx_config *dcbcfg)
 182 {
 183         u16 typelength;
 184         u16 offset = 0;
 185         u16 length;
 186         int i = 0;
 187         u8 *buf;
 188
 189         typelength = ntohs(tlv->typelength);
 190         length = FIELD_GET(I40E_LLDP_TLV_LEN_MASK, typelength);
 191         buf = tlv->tlvinfo;
 192
 193         /* The App priority table starts 5 octets after TLV header */
 194         length -= (sizeof(tlv->ouisubtype) + 1);
 195
 196         /* Move offset to App Priority Table */
 197         offset++;
 198
 199         /* Application Priority Table (3 octets)
 200          * Octets:|         1          |    2    |    3    |
 201          *        -----------------------------------------
 202          *        |Priority|Rsrvd| Sel |    Protocol ID    |
 203          *        -----------------------------------------
 204          *   Bits:|23    21|20 19|18 16|15                0|
 205          *        -----------------------------------------
 206          */
 207         while (offset < length) {
 208                 dcbcfg->app[i].priority = FIELD_GET(I40E_IEEE_APP_PRIO_MASK,
 209                                                     buf[offset]);
 210                 dcbcfg->app[i].selector = FIELD_GET(I40E_IEEE_APP_SEL_MASK,
 211                                                     buf[offset]);
 212                 dcbcfg->app[i].protocolid = (buf[offset + 1] << 0x8) |
 213                                              buf[offset + 2];
 214                 /* Move to next app */
 215                 offset += 3;
 216                 i++;
 217                 if (i >= I40E_DCBX_MAX_APPS)
 218                         break;
 219         }
 220
 221         dcbcfg->numapps = i;
 222 }
 223
 224 /**
 225  * i40e_parse_ieee_tlv
 226  * @tlv: IEEE 802.1Qaz TLV
 227  * @dcbcfg: Local store to update ETS REC data
 228  *
 229  * Get the TLV subtype and send it to parsing function
 230  * based on the subtype value
 231  **/
 232 static void i40e_parse_ieee_tlv(struct i40e_lldp_org_tlv *tlv,
 233                                 struct i40e_dcbx_config *dcbcfg)
 234 {
 235         u32 ouisubtype;
 236         u8 subtype;
 237
 238         ouisubtype = ntohl(tlv->ouisubtype);
 239         subtype = FIELD_GET(I40E_LLDP_TLV_SUBTYPE_MASK, ouisubtype);
 240         switch (subtype) {
 241         case I40E_IEEE_SUBTYPE_ETS_CFG:
 242                 i40e_parse_ieee_etscfg_tlv(tlv, dcbcfg);
 243                 break;
 244         case I40E_IEEE_SUBTYPE_ETS_REC:
 245                 i40e_parse_ieee_etsrec_tlv(tlv, dcbcfg);
 246                 break;
 247         case I40E_IEEE_SUBTYPE_PFC_CFG:
 248                 i40e_parse_ieee_pfccfg_tlv(tlv, dcbcfg);
 249                 break;
 250         case I40E_IEEE_SUBTYPE_APP_PRI:
 251                 i40e_parse_ieee_app_tlv(tlv, dcbcfg);
 252                 break;
 253         default:
 254                 break;
 255         }
 256 }
 257
 258 /**
 259  * i40e_parse_cee_pgcfg_tlv
 260  * @tlv: CEE DCBX PG CFG TLV
 261  * @dcbcfg: Local store to update ETS CFG data
 262  *
 263  * Parses CEE DCBX PG CFG TLV
 264  **/
 265 static void i40e_parse_cee_pgcfg_tlv(struct i40e_cee_feat_tlv *tlv,
 266                                      struct i40e_dcbx_config *dcbcfg)
 267 {
 268         struct i40e_dcb_ets_config *etscfg;
 269         u8 *buf = tlv->tlvinfo;
 270         u16 offset = 0;
 271         u8 priority;
 272         int i;
 273
 274         etscfg = &dcbcfg->etscfg;
 275
 276         if (tlv->en_will_err & I40E_CEE_FEAT_TLV_WILLING_MASK)
 277                 etscfg->willing = 1;
 278
 279         etscfg->cbs = 0;
 280         /* Priority Group Table (4 octets)
 281          * Octets:|    1    |    2    |    3    |    4    |
 282          *        -----------------------------------------
 283          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
 284          *        -----------------------------------------
 285          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
 286          *        -----------------------------------------
 287          */
 288         for (i = 0; i < 4; i++) {
 289                 priority = FIELD_GET(I40E_CEE_PGID_PRIO_1_MASK, buf[offset]);
 290                 etscfg->prioritytable[i * 2] = priority;
 291                 priority = FIELD_GET(I40E_CEE_PGID_PRIO_0_MASK, buf[offset]);
 292                 etscfg->prioritytable[i * 2 + 1] = priority;
 293                 offset++;
 294         }
 295
 296         /* PG Percentage Table (8 octets)
 297          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
 298          *        ---------------------------------
 299          *        |pg0|pg1|pg2|pg3|pg4|pg5|pg6|pg7|
 300          *        ---------------------------------
 301          */
 302         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
 303                 etscfg->tcbwtable[i] = buf[offset++];
 304
 305         /* Number of TCs supported (1 octet) */
 306         etscfg->maxtcs = buf[offset];
 307 }
 308
 309 /**
 310  * i40e_parse_cee_pfccfg_tlv
 311  * @tlv: CEE DCBX PFC CFG TLV
 312  * @dcbcfg: Local store to update PFC CFG data
 313  *
 314  * Parses CEE DCBX PFC CFG TLV
 315  **/
 316 static void i40e_parse_cee_pfccfg_tlv(struct i40e_cee_feat_tlv *tlv,
 317                                       struct i40e_dcbx_config *dcbcfg)
 318 {
 319         u8 *buf = tlv->tlvinfo;
 320
 321         if (tlv->en_will_err & I40E_CEE_FEAT_TLV_WILLING_MASK)
 322                 dcbcfg->pfc.willing = 1;
 323
 324         /* ------------------------
 325          * | PFC Enable | PFC TCs |
 326          * ------------------------
 327          * | 1 octet    | 1 octet |
 328          */
 329         dcbcfg->pfc.pfcenable = buf[0];
 330         dcbcfg->pfc.pfccap = buf[1];
 331 }
 332
 333 /**
 334  * i40e_parse_cee_app_tlv
 335  * @tlv: CEE DCBX APP TLV
 336  * @dcbcfg: Local store to update APP PRIO data
 337  *
 338  * Parses CEE DCBX APP PRIO TLV
 339  **/
 340 static void i40e_parse_cee_app_tlv(struct i40e_cee_feat_tlv *tlv,
 341                                    struct i40e_dcbx_config *dcbcfg)
 342 {
 343         u16 length, typelength, offset = 0;
 344         struct i40e_cee_app_prio *app;
 345         u8 i;
 346
 347         typelength = ntohs(tlv->hdr.typelen);
 348         length = FIELD_GET(I40E_LLDP_TLV_LEN_MASK, typelength);
 349
 350         dcbcfg->numapps = length / sizeof(*app);
 351
 352         if (!dcbcfg->numapps)
 353                 return;
 354         if (dcbcfg->numapps > I40E_DCBX_MAX_APPS)
 355                 dcbcfg->numapps = I40E_DCBX_MAX_APPS;
 356
 357         for (i = 0; i < dcbcfg->numapps; i++) {
 358                 u8 up, selector;
 359
 360                 app = (struct i40e_cee_app_prio *)(tlv->tlvinfo + offset);
 361                 for (up = 0; up < I40E_MAX_USER_PRIORITY; up++) {
 362                         if (app->prio_map & BIT(up))
 363                                 break;
 364                 }
 365                 dcbcfg->app[i].priority = up;
 366
 367                 /* Get Selector from lower 2 bits, and convert to IEEE */
 368                 selector = (app->upper_oui_sel & I40E_CEE_APP_SELECTOR_MASK);
 369                 switch (selector) {
 370                 case I40E_CEE_APP_SEL_ETHTYPE:
 371                         dcbcfg->app[i].selector = I40E_APP_SEL_ETHTYPE;
 372                         break;
 373                 case I40E_CEE_APP_SEL_TCPIP:
 374                         dcbcfg->app[i].selector = I40E_APP_SEL_TCPIP;
 375                         break;
 376                 default:
 377                         /* Keep selector as it is for unknown types */
 378                         dcbcfg->app[i].selector = selector;
 379                 }
 380
 381                 dcbcfg->app[i].protocolid = ntohs(app->protocol);
 382                 /* Move to next app */
 383                 offset += sizeof(*app);
 384         }
 385 }
 386
 387 /**
 388  * i40e_parse_cee_tlv
 389  * @tlv: CEE DCBX TLV
 390  * @dcbcfg: Local store to update DCBX config data
 391  *
 392  * Get the TLV subtype and send it to parsing function
 393  * based on the subtype value
 394  **/
 395 static void i40e_parse_cee_tlv(struct i40e_lldp_org_tlv *tlv,
 396                                struct i40e_dcbx_config *dcbcfg)
 397 {
 398         u16 len, tlvlen, sublen, typelength;
 399         struct i40e_cee_feat_tlv *sub_tlv;
 400         u8 subtype, feat_tlv_count = 0;
 401         u32 ouisubtype;
 402
 403         ouisubtype = ntohl(tlv->ouisubtype);
 404         subtype = FIELD_GET(I40E_LLDP_TLV_SUBTYPE_MASK, ouisubtype);
 405         /* Return if not CEE DCBX */
 406         if (subtype != I40E_CEE_DCBX_TYPE)
 407                 return;
 408
 409         typelength = ntohs(tlv->typelength);
 410         tlvlen = FIELD_GET(I40E_LLDP_TLV_LEN_MASK, typelength);
 411         len = sizeof(tlv->typelength) + sizeof(ouisubtype) +
 412               sizeof(struct i40e_cee_ctrl_tlv);
 413         /* Return if no CEE DCBX Feature TLVs */
 414         if (tlvlen <= len)
 415                 return;
 416
 417         sub_tlv = (struct i40e_cee_feat_tlv *)((char *)tlv + len);
 418         while (feat_tlv_count < I40E_CEE_MAX_FEAT_TYPE) {
 419                 typelength = ntohs(sub_tlv->hdr.typelen);
 420                 sublen = FIELD_GET(I40E_LLDP_TLV_LEN_MASK, typelength);
 421                 subtype = FIELD_GET(I40E_LLDP_TLV_TYPE_MASK, typelength);
 422                 switch (subtype) {
 423                 case I40E_CEE_SUBTYPE_PG_CFG:
 424                         i40e_parse_cee_pgcfg_tlv(sub_tlv, dcbcfg);
 425                         break;
 426                 case I40E_CEE_SUBTYPE_PFC_CFG:
 427                         i40e_parse_cee_pfccfg_tlv(sub_tlv, dcbcfg);
 428                         break;
 429                 case I40E_CEE_SUBTYPE_APP_PRI:
 430                         i40e_parse_cee_app_tlv(sub_tlv, dcbcfg);
 431                         break;
 432                 default:
 433                         return; /* Invalid Sub-type return */
 434                 }
 435                 feat_tlv_count++;
 436                 /* Move to next sub TLV */
 437                 sub_tlv = (struct i40e_cee_feat_tlv *)((char *)sub_tlv +
 438                                                 sizeof(sub_tlv->hdr.typelen) +
 439                                                 sublen);
 440         }
 441 }
 442
 443 /**
 444  * i40e_parse_org_tlv
 445  * @tlv: Organization specific TLV
 446  * @dcbcfg: Local store to update ETS REC data
 447  *
 448  * Currently only IEEE 802.1Qaz TLV is supported, all others
 449  * will be returned
 450  **/
 451 static void i40e_parse_org_tlv(struct i40e_lldp_org_tlv *tlv,
 452                                struct i40e_dcbx_config *dcbcfg)
 453 {
 454         u32 ouisubtype;
 455         u32 oui;
 456
 457         ouisubtype = ntohl(tlv->ouisubtype);
 458         oui = FIELD_GET(I40E_LLDP_TLV_OUI_MASK, ouisubtype);
 459         switch (oui) {
 460         case I40E_IEEE_8021QAZ_OUI:
 461                 i40e_parse_ieee_tlv(tlv, dcbcfg);
 462                 break;
 463         case I40E_CEE_DCBX_OUI:
 464                 i40e_parse_cee_tlv(tlv, dcbcfg);
 465                 break;
 466         default:
 467                 break;
 468         }
 469 }
 470
 471 /**
 472  * i40e_lldp_to_dcb_config
 473  * @lldpmib: LLDPDU to be parsed
 474  * @dcbcfg: store for LLDPDU data
 475  *
 476  * Parse DCB configuration from the LLDPDU
 477  **/
 478 int i40e_lldp_to_dcb_config(u8 *lldpmib,
 479                             struct i40e_dcbx_config *dcbcfg)
 480 {
 481         struct i40e_lldp_org_tlv *tlv;
 482         u16 typelength;
 483         u16 offset = 0;
 484         int ret = 0;
 485         u16 length;
 486         u16 type;
 487
 488         if (!lldpmib || !dcbcfg)
 489                 return -EINVAL;
 490
 491         /* set to the start of LLDPDU */
 492         lldpmib += ETH_HLEN;
 493         tlv = (struct i40e_lldp_org_tlv *)lldpmib;
 494         while (1) {
 495                 typelength = ntohs(tlv->typelength);
 496                 type = FIELD_GET(I40E_LLDP_TLV_TYPE_MASK, typelength);
 497                 length = FIELD_GET(I40E_LLDP_TLV_LEN_MASK, typelength);
 498                 offset += sizeof(typelength) + length;
 499
 500                 /* END TLV or beyond LLDPDU size */
 501                 if ((type == I40E_TLV_TYPE_END) || (offset > I40E_LLDPDU_SIZE))
 502                         break;
 503
 504                 switch (type) {
 505                 case I40E_TLV_TYPE_ORG:
 506                         i40e_parse_org_tlv(tlv, dcbcfg);
 507                         break;
 508                 default:
 509                         break;
 510                 }
 511
 512                 /* Move to next TLV */
 513                 tlv = (struct i40e_lldp_org_tlv *)((char *)tlv +
 514                                                     sizeof(tlv->typelength) +
 515                                                     length);
 516         }
 517
 518         return ret;
 519 }
 520
 521 /**
 522  * i40e_aq_get_dcb_config
 523  * @hw: pointer to the hw struct
 524  * @mib_type: mib type for the query
 525  * @bridgetype: bridge type for the query (remote)
 526  * @dcbcfg: store for LLDPDU data
 527  *
 528  * Query DCB configuration from the Firmware
 529  **/
 530 int i40e_aq_get_dcb_config(struct i40e_hw *hw, u8 mib_type,
 531                            u8 bridgetype,
 532                            struct i40e_dcbx_config *dcbcfg)
 533 {
 534         struct i40e_virt_mem mem;
 535         int ret = 0;
 536         u8 *lldpmib;
 537
 538         /* Allocate the LLDPDU */
 539         ret = i40e_allocate_virt_mem(hw, &mem, I40E_LLDPDU_SIZE);
 540         if (ret)
 541                 return ret;
 542
 543         lldpmib = (u8 *)mem.va;
 544         ret = i40e_aq_get_lldp_mib(hw, bridgetype, mib_type,
 545                                    (void *)lldpmib, I40E_LLDPDU_SIZE,
 546                                    NULL, NULL, NULL);
 547         if (ret)
 548                 goto free_mem;
 549
 550         /* Parse LLDP MIB to get dcb configuration */
 551         ret = i40e_lldp_to_dcb_config(lldpmib, dcbcfg);
 552
 553 free_mem:
 554         i40e_free_virt_mem(hw, &mem);
 555         return ret;
 556 }
 557
 558 /**
 559  * i40e_cee_to_dcb_v1_config
 560  * @cee_cfg: pointer to CEE v1 response configuration struct
 561  * @dcbcfg: DCB configuration struct
 562  *
 563  * Convert CEE v1 configuration from firmware to DCB configuration
 564  **/
 565 static void i40e_cee_to_dcb_v1_config(
 566                         struct i40e_aqc_get_cee_dcb_cfg_v1_resp *cee_cfg,
 567                         struct i40e_dcbx_config *dcbcfg)
 568 {
 569         u16 status, tlv_status = le16_to_cpu(cee_cfg->tlv_status);
 570         u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
 571         u8 i, err;
 572
 573         /* CEE PG data to ETS config */
 574         dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;
 575
 576         /* Note that the FW creates the oper_prio_tc nibbles reversed
 577          * from those in the CEE Priority Group sub-TLV.
 578          */
 579         for (i = 0; i < 4; i++) {
 580                 u8 tc;
 581
 582                 tc = FIELD_GET(I40E_CEE_PGID_PRIO_0_MASK,
 583                                cee_cfg->oper_prio_tc[i]);
 584                 dcbcfg->etscfg.prioritytable[i * 2] = tc;
 585                 tc = FIELD_GET(I40E_CEE_PGID_PRIO_1_MASK,
 586                                cee_cfg->oper_prio_tc[i]);
 587                 dcbcfg->etscfg.prioritytable[i*2 + 1] = tc;
 588         }
 589
 590         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
 591                 dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];
 592
 593         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
 594                 if (dcbcfg->etscfg.prioritytable[i] == I40E_CEE_PGID_STRICT) {
 595                         /* Map it to next empty TC */
 596                         dcbcfg->etscfg.prioritytable[i] =
 597                                                 cee_cfg->oper_num_tc - 1;
 598                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_STRICT;
 599                 } else {
 600                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_ETS;
 601                 }
 602         }
 603
 604         /* CEE PFC data to ETS config */
 605         dcbcfg->pfc.pfcenable = cee_cfg->oper_pfc_en;
 606         dcbcfg->pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
 607
 608         status = FIELD_GET(I40E_AQC_CEE_APP_STATUS_MASK, tlv_status);
 609         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
 610         /* Add APPs if Error is False */
 611         if (!err) {
 612                 /* CEE operating configuration supports FCoE/iSCSI/FIP only */
 613                 dcbcfg->numapps = I40E_CEE_OPER_MAX_APPS;
 614
 615                 /* FCoE APP */
 616                 dcbcfg->app[0].priority =
 617                         FIELD_GET(I40E_AQC_CEE_APP_FCOE_MASK, app_prio);
 618                 dcbcfg->app[0].selector = I40E_APP_SEL_ETHTYPE;
 619                 dcbcfg->app[0].protocolid = I40E_APP_PROTOID_FCOE;
 620
 621                 /* iSCSI APP */
 622                 dcbcfg->app[1].priority =
 623                         FIELD_GET(I40E_AQC_CEE_APP_ISCSI_MASK, app_prio);
 624                 dcbcfg->app[1].selector = I40E_APP_SEL_TCPIP;
 625                 dcbcfg->app[1].protocolid = I40E_APP_PROTOID_ISCSI;
 626
 627                 /* FIP APP */
 628                 dcbcfg->app[2].priority =
 629                         FIELD_GET(I40E_AQC_CEE_APP_FIP_MASK, app_prio);
 630                 dcbcfg->app[2].selector = I40E_APP_SEL_ETHTYPE;
 631                 dcbcfg->app[2].protocolid = I40E_APP_PROTOID_FIP;
 632         }
 633 }
 634
 635 /**
 636  * i40e_cee_to_dcb_config
 637  * @cee_cfg: pointer to CEE configuration struct
 638  * @dcbcfg: DCB configuration struct
 639  *
 640  * Convert CEE configuration from firmware to DCB configuration
 641  **/
 642 static void i40e_cee_to_dcb_config(
 643                                 struct i40e_aqc_get_cee_dcb_cfg_resp *cee_cfg,
 644                                 struct i40e_dcbx_config *dcbcfg)
 645 {
 646         u32 status, tlv_status = le32_to_cpu(cee_cfg->tlv_status);
 647         u16 app_prio = le16_to_cpu(cee_cfg->oper_app_prio);
 648         u8 i, err, sync, oper;
 649
 650         /* CEE PG data to ETS config */
 651         dcbcfg->etscfg.maxtcs = cee_cfg->oper_num_tc;
 652
 653         /* Note that the FW creates the oper_prio_tc nibbles reversed
 654          * from those in the CEE Priority Group sub-TLV.
 655          */
 656         for (i = 0; i < 4; i++) {
 657                 u8 tc;
 658
 659                 tc = FIELD_GET(I40E_CEE_PGID_PRIO_0_MASK,
 660                                cee_cfg->oper_prio_tc[i]);
 661                 dcbcfg->etscfg.prioritytable[i * 2] = tc;
 662                 tc = FIELD_GET(I40E_CEE_PGID_PRIO_1_MASK,
 663                                cee_cfg->oper_prio_tc[i]);
 664                 dcbcfg->etscfg.prioritytable[i * 2 + 1] = tc;
 665         }
 666
 667         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
 668                 dcbcfg->etscfg.tcbwtable[i] = cee_cfg->oper_tc_bw[i];
 669
 670         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
 671                 if (dcbcfg->etscfg.prioritytable[i] == I40E_CEE_PGID_STRICT) {
 672                         /* Map it to next empty TC */
 673                         dcbcfg->etscfg.prioritytable[i] =
 674                                                 cee_cfg->oper_num_tc - 1;
 675                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_STRICT;
 676                 } else {
 677                         dcbcfg->etscfg.tsatable[i] = I40E_IEEE_TSA_ETS;
 678                 }
 679         }
 680
 681         /* CEE PFC data to ETS config */
 682         dcbcfg->pfc.pfcenable = cee_cfg->oper_pfc_en;
 683         dcbcfg->pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
 684
 685         i = 0;
 686         status = FIELD_GET(I40E_AQC_CEE_FCOE_STATUS_MASK, tlv_status);
 687         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
 688         sync = (status & I40E_TLV_STATUS_SYNC) ? 1 : 0;
 689         oper = (status & I40E_TLV_STATUS_OPER) ? 1 : 0;
 690         /* Add FCoE APP if Error is False and Oper/Sync is True */
 691         if (!err && sync && oper) {
 692                 /* FCoE APP */
 693                 dcbcfg->app[i].priority =
 694                         FIELD_GET(I40E_AQC_CEE_APP_FCOE_MASK, app_prio);
 695                 dcbcfg->app[i].selector = I40E_APP_SEL_ETHTYPE;
 696                 dcbcfg->app[i].protocolid = I40E_APP_PROTOID_FCOE;
 697                 i++;
 698         }
 699
 700         status = FIELD_GET(I40E_AQC_CEE_ISCSI_STATUS_MASK, tlv_status);
 701         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
 702         sync = (status & I40E_TLV_STATUS_SYNC) ? 1 : 0;
 703         oper = (status & I40E_TLV_STATUS_OPER) ? 1 : 0;
 704         /* Add iSCSI APP if Error is False and Oper/Sync is True */
 705         if (!err && sync && oper) {
 706                 /* iSCSI APP */
 707                 dcbcfg->app[i].priority =
 708                         FIELD_GET(I40E_AQC_CEE_APP_ISCSI_MASK, app_prio);
 709                 dcbcfg->app[i].selector = I40E_APP_SEL_TCPIP;
 710                 dcbcfg->app[i].protocolid = I40E_APP_PROTOID_ISCSI;
 711                 i++;
 712         }
 713
 714         status = FIELD_GET(I40E_AQC_CEE_FIP_STATUS_MASK, tlv_status);
 715         err = (status & I40E_TLV_STATUS_ERR) ? 1 : 0;
 716         sync = (status & I40E_TLV_STATUS_SYNC) ? 1 : 0;
 717         oper = (status & I40E_TLV_STATUS_OPER) ? 1 : 0;
 718         /* Add FIP APP if Error is False and Oper/Sync is True */
 719         if (!err && sync && oper) {
 720                 /* FIP APP */
 721                 dcbcfg->app[i].priority =
 722                         FIELD_GET(I40E_AQC_CEE_APP_FIP_MASK, app_prio);
 723                 dcbcfg->app[i].selector = I40E_APP_SEL_ETHTYPE;
 724                 dcbcfg->app[i].protocolid = I40E_APP_PROTOID_FIP;
 725                 i++;
 726         }
 727         dcbcfg->numapps = i;
 728 }
 729
 730 /**
 731  * i40e_get_ieee_dcb_config
 732  * @hw: pointer to the hw struct
 733  *
 734  * Get IEEE mode DCB configuration from the Firmware
 735  **/
 736 static int i40e_get_ieee_dcb_config(struct i40e_hw *hw)
 737 {
 738         int ret = 0;
 739
 740         /* IEEE mode */
 741         hw->local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_IEEE;
 742         /* Get Local DCB Config */
 743         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_LOCAL, 0,
 744                                      &hw->local_dcbx_config);
 745         if (ret)
 746                 goto out;
 747
 748         /* Get Remote DCB Config */
 749         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
 750                                      I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
 751                                      &hw->remote_dcbx_config);
 752         /* Don't treat ENOENT as an error for Remote MIBs */
 753         if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT)
 754                 ret = 0;
 755
 756 out:
 757         return ret;
 758 }
 759
 760 /**
 761  * i40e_get_dcb_config
 762  * @hw: pointer to the hw struct
 763  *
 764  * Get DCB configuration from the Firmware
 765  **/
 766 int i40e_get_dcb_config(struct i40e_hw *hw)
 767 {
 768         struct i40e_aqc_get_cee_dcb_cfg_v1_resp cee_v1_cfg;
 769         struct i40e_aqc_get_cee_dcb_cfg_resp cee_cfg;
 770         int ret = 0;
 771
 772         /* If Firmware version < v4.33 on X710/XL710, IEEE only */
 773         if (hw->mac.type == I40E_MAC_XL710 && i40e_is_fw_ver_lt(hw, 4, 33))
 774                 return i40e_get_ieee_dcb_config(hw);
 775
 776         /* If Firmware version == v4.33 on X710/XL710, use old CEE struct */
 777         if (hw->mac.type == I40E_MAC_XL710 && i40e_is_fw_ver_eq(hw, 4, 33)) {
 778                 ret = i40e_aq_get_cee_dcb_config(hw, &cee_v1_cfg,
 779                                                  sizeof(cee_v1_cfg), NULL);
 780                 if (!ret) {
 781                         /* CEE mode */
 782                         hw->local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_CEE;
 783                         hw->local_dcbx_config.tlv_status =
 784                                         le16_to_cpu(cee_v1_cfg.tlv_status);
 785                         i40e_cee_to_dcb_v1_config(&cee_v1_cfg,
 786                                                   &hw->local_dcbx_config);
 787                 }
 788         } else {
 789                 ret = i40e_aq_get_cee_dcb_config(hw, &cee_cfg,
 790                                                  sizeof(cee_cfg), NULL);
 791                 if (!ret) {
 792                         /* CEE mode */
 793                         hw->local_dcbx_config.dcbx_mode = I40E_DCBX_MODE_CEE;
 794                         hw->local_dcbx_config.tlv_status =
 795                                         le32_to_cpu(cee_cfg.tlv_status);
 796                         i40e_cee_to_dcb_config(&cee_cfg,
 797                                                &hw->local_dcbx_config);
 798                 }
 799         }
 800
 801         /* CEE mode not enabled try querying IEEE data */
 802         if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT)
 803                 return i40e_get_ieee_dcb_config(hw);
 804
 805         if (ret)
 806                 goto out;
 807
 808         /* Get CEE DCB Desired Config */
 809         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_LOCAL, 0,
 810                                      &hw->desired_dcbx_config);
 811         if (ret)
 812                 goto out;
 813
 814         /* Get Remote DCB Config */
 815         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
 816                                      I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
 817                                      &hw->remote_dcbx_config);
 818         /* Don't treat ENOENT as an error for Remote MIBs */
 819         if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT)
 820                 ret = 0;
 821
 822 out:
 823         return ret;
 824 }
 825
 826 /**
 827  * i40e_init_dcb
 828  * @hw: pointer to the hw struct
 829  * @enable_mib_change: enable mib change event
 830  *
 831  * Update DCB configuration from the Firmware
 832  **/
 833 int i40e_init_dcb(struct i40e_hw *hw, bool enable_mib_change)
 834 {
 835         struct i40e_lldp_variables lldp_cfg;
 836         u8 adminstatus = 0;
 837         int ret = 0;
 838
 839         if (!hw->func_caps.dcb)
 840                 return -EOPNOTSUPP;
 841
 842         /* Read LLDP NVM area */
 843         if (test_bit(I40E_HW_CAP_FW_LLDP_PERSISTENT, hw->caps)) {
 844                 u8 offset = 0;
 845
 846                 if (hw->mac.type == I40E_MAC_XL710)
 847                         offset = I40E_LLDP_CURRENT_STATUS_XL710_OFFSET;
 848                 else if (hw->mac.type == I40E_MAC_X722)
 849                         offset = I40E_LLDP_CURRENT_STATUS_X722_OFFSET;
 850                 else
 851                         return -EOPNOTSUPP;
 852
 853                 ret = i40e_read_nvm_module_data(hw,
 854                                                 I40E_SR_EMP_SR_SETTINGS_PTR,
 855                                                 offset,
 856                                                 I40E_LLDP_CURRENT_STATUS_OFFSET,
 857                                                 I40E_LLDP_CURRENT_STATUS_SIZE,
 858                                                 &lldp_cfg.adminstatus);
 859         } else {
 860                 ret = i40e_read_lldp_cfg(hw, &lldp_cfg);
 861         }
 862         if (ret)
 863                 return -EBUSY;
 864
 865         /* Get the LLDP AdminStatus for the current port */
 866         adminstatus = lldp_cfg.adminstatus >> (hw->port * 4);
 867         adminstatus &= 0xF;
 868
 869         /* LLDP agent disabled */
 870         if (!adminstatus) {
 871                 hw->dcbx_status = I40E_DCBX_STATUS_DISABLED;
 872                 return -EBUSY;
 873         }
 874
 875         /* Get DCBX status */
 876         ret = i40e_get_dcbx_status(hw, &hw->dcbx_status);
 877         if (ret)
 878                 return ret;
 879
 880         /* Check the DCBX Status */
 881         if (hw->dcbx_status == I40E_DCBX_STATUS_DONE ||
 882             hw->dcbx_status == I40E_DCBX_STATUS_IN_PROGRESS) {
 883                 /* Get current DCBX configuration */
 884                 ret = i40e_get_dcb_config(hw);
 885                 if (ret)
 886                         return ret;
 887         } else if (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED) {
 888                 return -EBUSY;
 889         }
 890
 891         /* Configure the LLDP MIB change event */
 892         if (enable_mib_change)
 893                 ret = i40e_aq_cfg_lldp_mib_change_event(hw, true, NULL);
 894
 895         return ret;
 896 }
 897
 898 /**
 899  * i40e_get_fw_lldp_status
 900  * @hw: pointer to the hw struct
 901  * @lldp_status: pointer to the status enum
 902  *
 903  * Get status of FW Link Layer Discovery Protocol (LLDP) Agent.
 904  * Status of agent is reported via @lldp_status parameter.
 905  **/
 906 int
 907 i40e_get_fw_lldp_status(struct i40e_hw *hw,
 908                         enum i40e_get_fw_lldp_status_resp *lldp_status)
 909 {
 910         struct i40e_virt_mem mem;
 911         u8 *lldpmib;
 912         int ret;
 913
 914         if (!lldp_status)
 915                 return -EINVAL;
 916
 917         /* Allocate buffer for the LLDPDU */
 918         ret = i40e_allocate_virt_mem(hw, &mem, I40E_LLDPDU_SIZE);
 919         if (ret)
 920                 return ret;
 921
 922         lldpmib = (u8 *)mem.va;
 923         ret = i40e_aq_get_lldp_mib(hw, 0, 0, (void *)lldpmib,
 924                                    I40E_LLDPDU_SIZE, NULL, NULL, NULL);
 925
 926         if (!ret) {
 927                 *lldp_status = I40E_GET_FW_LLDP_STATUS_ENABLED;
 928         } else if (hw->aq.asq_last_status == I40E_AQ_RC_ENOENT) {
 929                 /* MIB is not available yet but the agent is running */
 930                 *lldp_status = I40E_GET_FW_LLDP_STATUS_ENABLED;
 931                 ret = 0;
 932         } else if (hw->aq.asq_last_status == I40E_AQ_RC_EPERM) {
 933                 *lldp_status = I40E_GET_FW_LLDP_STATUS_DISABLED;
 934                 ret = 0;
 935         }
 936
 937         i40e_free_virt_mem(hw, &mem);
 938         return ret;
 939 }
 940
 941 /**
 942  * i40e_add_ieee_ets_tlv - Prepare ETS TLV in IEEE format
 943  * @tlv: Fill the ETS config data in IEEE format
 944  * @dcbcfg: Local store which holds the DCB Config
 945  *
 946  * Prepare IEEE 802.1Qaz ETS CFG TLV
 947  **/
 948 static void i40e_add_ieee_ets_tlv(struct i40e_lldp_org_tlv *tlv,
 949                                   struct i40e_dcbx_config *dcbcfg)
 950 {
 951         u8 priority0, priority1, maxtcwilling = 0;
 952         struct i40e_dcb_ets_config *etscfg;
 953         u16 offset = 0, typelength, i;
 954         u8 *buf = tlv->tlvinfo;
 955         u32 ouisubtype;
 956
 957         typelength = (u16)((I40E_TLV_TYPE_ORG << I40E_LLDP_TLV_TYPE_SHIFT) |
 958                         I40E_IEEE_ETS_TLV_LENGTH);
 959         tlv->typelength = htons(typelength);
 960
 961         ouisubtype = (u32)((I40E_IEEE_8021QAZ_OUI << I40E_LLDP_TLV_OUI_SHIFT) |
 962                         I40E_IEEE_SUBTYPE_ETS_CFG);
 963         tlv->ouisubtype = htonl(ouisubtype);
 964
 965         /* First Octet post subtype
 966          * --------------------------
 967          * |will-|CBS  | Re-  | Max |
 968          * |ing  |     |served| TCs |
 969          * --------------------------
 970          * |1bit | 1bit|3 bits|3bits|
 971          */
 972         etscfg = &dcbcfg->etscfg;
 973         if (etscfg->willing)
 974                 maxtcwilling = BIT(I40E_IEEE_ETS_WILLING_SHIFT);
 975         maxtcwilling |= etscfg->maxtcs & I40E_IEEE_ETS_MAXTC_MASK;
 976         buf[offset] = maxtcwilling;
 977
 978         /* Move offset to Priority Assignment Table */
 979         offset++;
 980
 981         /* Priority Assignment Table (4 octets)
 982          * Octets:|    1    |    2    |    3    |    4    |
 983          *        -----------------------------------------
 984          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
 985          *        -----------------------------------------
 986          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
 987          *        -----------------------------------------
 988          */
 989         for (i = 0; i < 4; i++) {
 990                 priority0 = etscfg->prioritytable[i * 2] & 0xF;
 991                 priority1 = etscfg->prioritytable[i * 2 + 1] & 0xF;
 992                 buf[offset] = (priority0 << I40E_IEEE_ETS_PRIO_1_SHIFT) |
 993                                 priority1;
 994                 offset++;
 995         }
 996
 997         /* TC Bandwidth Table (8 octets)
 998          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
 999          *        ---------------------------------
1000          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
1001          *        ---------------------------------
1002          */
1003         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
1004                 buf[offset++] = etscfg->tcbwtable[i];
1005
1006         /* TSA Assignment Table (8 octets)
1007          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
1008          *        ---------------------------------
1009          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
1010          *        ---------------------------------
1011          */
1012         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
1013                 buf[offset++] = etscfg->tsatable[i];
1014 }
1015
1016 /**
1017  * i40e_add_ieee_etsrec_tlv - Prepare ETS Recommended TLV in IEEE format
1018  * @tlv: Fill ETS Recommended TLV in IEEE format
1019  * @dcbcfg: Local store which holds the DCB Config
1020  *
1021  * Prepare IEEE 802.1Qaz ETS REC TLV
1022  **/
1023 static void i40e_add_ieee_etsrec_tlv(struct i40e_lldp_org_tlv *tlv,
1024                                      struct i40e_dcbx_config *dcbcfg)
1025 {
1026         struct i40e_dcb_ets_config *etsrec;
1027         u16 offset = 0, typelength, i;
1028         u8 priority0, priority1;
1029         u8 *buf = tlv->tlvinfo;
1030         u32 ouisubtype;
1031
1032         typelength = (u16)((I40E_TLV_TYPE_ORG << I40E_LLDP_TLV_TYPE_SHIFT) |
1033                         I40E_IEEE_ETS_TLV_LENGTH);
1034         tlv->typelength = htons(typelength);
1035
1036         ouisubtype = (u32)((I40E_IEEE_8021QAZ_OUI << I40E_LLDP_TLV_OUI_SHIFT) |
1037                         I40E_IEEE_SUBTYPE_ETS_REC);
1038         tlv->ouisubtype = htonl(ouisubtype);
1039
1040         etsrec = &dcbcfg->etsrec;
1041         /* First Octet is reserved */
1042         /* Move offset to Priority Assignment Table */
1043         offset++;
1044
1045         /* Priority Assignment Table (4 octets)
1046          * Octets:|    1    |    2    |    3    |    4    |
1047          *        -----------------------------------------
1048          *        |pri0|pri1|pri2|pri3|pri4|pri5|pri6|pri7|
1049          *        -----------------------------------------
1050          *   Bits:|7  4|3  0|7  4|3  0|7  4|3  0|7  4|3  0|
1051          *        -----------------------------------------
1052          */
1053         for (i = 0; i < 4; i++) {
1054                 priority0 = etsrec->prioritytable[i * 2] & 0xF;
1055                 priority1 = etsrec->prioritytable[i * 2 + 1] & 0xF;
1056                 buf[offset] = (priority0 << I40E_IEEE_ETS_PRIO_1_SHIFT) |
1057                                 priority1;
1058                 offset++;
1059         }
1060
1061         /* TC Bandwidth Table (8 octets)
1062          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
1063          *        ---------------------------------
1064          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
1065          *        ---------------------------------
1066          */
1067         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
1068                 buf[offset++] = etsrec->tcbwtable[i];
1069
1070         /* TSA Assignment Table (8 octets)
1071          * Octets:| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
1072          *        ---------------------------------
1073          *        |tc0|tc1|tc2|tc3|tc4|tc5|tc6|tc7|
1074          *        ---------------------------------
1075          */
1076         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
1077                 buf[offset++] = etsrec->tsatable[i];
1078 }
1079
1080 /**
1081  * i40e_add_ieee_pfc_tlv - Prepare PFC TLV in IEEE format
1082  * @tlv: Fill PFC TLV in IEEE format
1083  * @dcbcfg: Local store to get PFC CFG data
1084  *
1085  * Prepare IEEE 802.1Qaz PFC CFG TLV
1086  **/
1087 static void i40e_add_ieee_pfc_tlv(struct i40e_lldp_org_tlv *tlv,
1088                                   struct i40e_dcbx_config *dcbcfg)
1089 {
1090         u8 *buf = tlv->tlvinfo;
1091         u32 ouisubtype;
1092         u16 typelength;
1093
1094         typelength = (u16)((I40E_TLV_TYPE_ORG << I40E_LLDP_TLV_TYPE_SHIFT) |
1095                         I40E_IEEE_PFC_TLV_LENGTH);
1096         tlv->typelength = htons(typelength);
1097
1098         ouisubtype = (u32)((I40E_IEEE_8021QAZ_OUI << I40E_LLDP_TLV_OUI_SHIFT) |
1099                         I40E_IEEE_SUBTYPE_PFC_CFG);
1100         tlv->ouisubtype = htonl(ouisubtype);
1101
1102         /* ----------------------------------------
1103          * |will-|MBC  | Re-  | PFC |  PFC Enable  |
1104          * |ing  |     |served| cap |              |
1105          * -----------------------------------------
1106          * |1bit | 1bit|2 bits|4bits| 1 octet      |
1107          */
1108         if (dcbcfg->pfc.willing)
1109                 buf[0] = BIT(I40E_IEEE_PFC_WILLING_SHIFT);
1110
1111         if (dcbcfg->pfc.mbc)
1112                 buf[0] |= BIT(I40E_IEEE_PFC_MBC_SHIFT);
1113
1114         buf[0] |= dcbcfg->pfc.pfccap & 0xF;
1115         buf[1] = dcbcfg->pfc.pfcenable;
1116 }
1117
1118 /**
1119  * i40e_add_ieee_app_pri_tlv -  Prepare APP TLV in IEEE format
1120  * @tlv: Fill APP TLV in IEEE format
1121  * @dcbcfg: Local store to get APP CFG data
1122  *
1123  * Prepare IEEE 802.1Qaz APP CFG TLV
1124  **/
1125 static void i40e_add_ieee_app_pri_tlv(struct i40e_lldp_org_tlv *tlv,
1126                                       struct i40e_dcbx_config *dcbcfg)
1127 {
1128         u16 typelength, length, offset = 0;
1129         u8 priority, selector, i = 0;
1130         u8 *buf = tlv->tlvinfo;
1131         u32 ouisubtype;
1132
1133         /* No APP TLVs then just return */
1134         if (dcbcfg->numapps == 0)
1135                 return;
1136         ouisubtype = (u32)((I40E_IEEE_8021QAZ_OUI << I40E_LLDP_TLV_OUI_SHIFT) |
1137                         I40E_IEEE_SUBTYPE_APP_PRI);
1138         tlv->ouisubtype = htonl(ouisubtype);
1139
1140         /* Move offset to App Priority Table */
1141         offset++;
1142         /* Application Priority Table (3 octets)
1143          * Octets:|         1          |    2    |    3    |
1144          *        -----------------------------------------
1145          *        |Priority|Rsrvd| Sel |    Protocol ID    |
1146          *        -----------------------------------------
1147          *   Bits:|23    21|20 19|18 16|15                0|
1148          *        -----------------------------------------
1149          */
1150         while (i < dcbcfg->numapps) {
1151                 priority = dcbcfg->app[i].priority & 0x7;
1152                 selector = dcbcfg->app[i].selector & 0x7;
1153                 buf[offset] = (priority << I40E_IEEE_APP_PRIO_SHIFT) | selector;
1154                 buf[offset + 1] = (dcbcfg->app[i].protocolid >> 0x8) & 0xFF;
1155                 buf[offset + 2] = dcbcfg->app[i].protocolid & 0xFF;
1156                 /* Move to next app */
1157                 offset += 3;
1158                 i++;
1159                 if (i >= I40E_DCBX_MAX_APPS)
1160                         break;
1161         }
1162         /* length includes size of ouisubtype + 1 reserved + 3*numapps */
1163         length = sizeof(tlv->ouisubtype) + 1 + (i * 3);
1164         typelength = (u16)((I40E_TLV_TYPE_ORG << I40E_LLDP_TLV_TYPE_SHIFT) |
1165                 (length & 0x1FF));
1166         tlv->typelength = htons(typelength);
1167 }
1168
1169 /**
1170  * i40e_add_dcb_tlv - Add all IEEE TLVs
1171  * @tlv: pointer to org tlv
1172  * @dcbcfg: pointer to modified dcbx config structure *
1173  * @tlvid: tlv id to be added
1174  * add tlv information
1175  **/
1176 static void i40e_add_dcb_tlv(struct i40e_lldp_org_tlv *tlv,
1177                              struct i40e_dcbx_config *dcbcfg,
1178                              u16 tlvid)
1179 {
1180         switch (tlvid) {
1181         case I40E_IEEE_TLV_ID_ETS_CFG:
1182                 i40e_add_ieee_ets_tlv(tlv, dcbcfg);
1183                 break;
1184         case I40E_IEEE_TLV_ID_ETS_REC:
1185                 i40e_add_ieee_etsrec_tlv(tlv, dcbcfg);
1186                 break;
1187         case I40E_IEEE_TLV_ID_PFC_CFG:
1188                 i40e_add_ieee_pfc_tlv(tlv, dcbcfg);
1189                 break;
1190         case I40E_IEEE_TLV_ID_APP_PRI:
1191                 i40e_add_ieee_app_pri_tlv(tlv, dcbcfg);
1192                 break;
1193         default:
1194                 break;
1195         }
1196 }
1197
1198 /**
1199  * i40e_set_dcb_config - Set the local LLDP MIB to FW
1200  * @hw: pointer to the hw struct
1201  *
1202  * Set DCB configuration to the Firmware
1203  **/
1204 int i40e_set_dcb_config(struct i40e_hw *hw)
1205 {
1206         struct i40e_dcbx_config *dcbcfg;
1207         struct i40e_virt_mem mem;
1208         u8 mib_type, *lldpmib;
1209         u16 miblen;
1210         int ret;
1211
1212         /* update the hw local config */
1213         dcbcfg = &hw->local_dcbx_config;
1214         /* Allocate the LLDPDU */
1215         ret = i40e_allocate_virt_mem(hw, &mem, I40E_LLDPDU_SIZE);
1216         if (ret)
1217                 return ret;
1218
1219         mib_type = SET_LOCAL_MIB_AC_TYPE_LOCAL_MIB;
1220         if (dcbcfg->app_mode == I40E_DCBX_APPS_NON_WILLING) {
1221                 mib_type |= SET_LOCAL_MIB_AC_TYPE_NON_WILLING_APPS <<
1222                             SET_LOCAL_MIB_AC_TYPE_NON_WILLING_APPS_SHIFT;
1223         }
1224         lldpmib = (u8 *)mem.va;
1225         i40e_dcb_config_to_lldp(lldpmib, &miblen, dcbcfg);
1226         ret = i40e_aq_set_lldp_mib(hw, mib_type, (void *)lldpmib, miblen, NULL);
1227
1228         i40e_free_virt_mem(hw, &mem);
1229         return ret;
1230 }
1231
1232 /**
1233  * i40e_dcb_config_to_lldp - Convert Dcbconfig to MIB format
1234  * @lldpmib: pointer to mib to be output
1235  * @miblen: pointer to u16 for length of lldpmib
1236  * @dcbcfg: store for LLDPDU data
1237  *
1238  * send DCB configuration to FW
1239  **/
1240 int i40e_dcb_config_to_lldp(u8 *lldpmib, u16 *miblen,
1241                             struct i40e_dcbx_config *dcbcfg)
1242 {
1243         u16 length, offset = 0, tlvid, typelength;
1244         struct i40e_lldp_org_tlv *tlv;
1245
1246         tlv = (struct i40e_lldp_org_tlv *)lldpmib;
1247         tlvid = I40E_TLV_ID_START;
1248         do {
1249                 i40e_add_dcb_tlv(tlv, dcbcfg, tlvid++);
1250                 typelength = ntohs(tlv->typelength);
1251                 length = FIELD_GET(I40E_LLDP_TLV_LEN_MASK, typelength);
1252                 if (length)
1253                         offset += length + I40E_IEEE_TLV_HEADER_LENGTH;
1254                 /* END TLV or beyond LLDPDU size */
1255                 if (tlvid >= I40E_TLV_ID_END_OF_LLDPPDU ||
1256                     offset >= I40E_LLDPDU_SIZE)
1257                         break;
1258                 /* Move to next TLV */
1259                 if (length)
1260                         tlv = (struct i40e_lldp_org_tlv *)((char *)tlv +
1261                               sizeof(tlv->typelength) + length);
1262         } while (tlvid < I40E_TLV_ID_END_OF_LLDPPDU);
1263         *miblen = offset;
1264         return 0;
1265 }
1266
1267 /**
1268  * i40e_dcb_hw_rx_fifo_config
1269  * @hw: pointer to the hw struct
1270  * @ets_mode: Strict Priority or Round Robin mode
1271  * @non_ets_mode: Strict Priority or Round Robin
1272  * @max_exponent: Exponent to calculate max refill credits
1273  * @lltc_map: Low latency TC bitmap
1274  *
1275  * Configure HW Rx FIFO as part of DCB configuration.
1276  **/
1277 void i40e_dcb_hw_rx_fifo_config(struct i40e_hw *hw,
1278                                 enum i40e_dcb_arbiter_mode ets_mode,
1279                                 enum i40e_dcb_arbiter_mode non_ets_mode,
1280                                 u32 max_exponent,
1281                                 u8 lltc_map)
1282 {
1283         u32 reg = rd32(hw, I40E_PRTDCB_RETSC);
1284
1285         reg &= ~I40E_PRTDCB_RETSC_ETS_MODE_MASK;
1286         reg |= FIELD_PREP(I40E_PRTDCB_RETSC_ETS_MODE_MASK, ets_mode);
1287
1288         reg &= ~I40E_PRTDCB_RETSC_NON_ETS_MODE_MASK;
1289         reg |= FIELD_PREP(I40E_PRTDCB_RETSC_NON_ETS_MODE_MASK, non_ets_mode);
1290
1291         reg &= ~I40E_PRTDCB_RETSC_ETS_MAX_EXP_MASK;
1292         reg |= FIELD_PREP(I40E_PRTDCB_RETSC_ETS_MAX_EXP_MASK, max_exponent);
1293
1294         reg &= ~I40E_PRTDCB_RETSC_LLTC_MASK;
1295         reg |= FIELD_PREP(I40E_PRTDCB_RETSC_LLTC_MASK, lltc_map);
1296         wr32(hw, I40E_PRTDCB_RETSC, reg);
1297 }
1298
1299 /**
1300  * i40e_dcb_hw_rx_cmd_monitor_config
1301  * @hw: pointer to the hw struct
1302  * @num_tc: Total number of traffic class
1303  * @num_ports: Total number of ports on device
1304  *
1305  * Configure HW Rx command monitor as part of DCB configuration.
1306  **/
1307 void i40e_dcb_hw_rx_cmd_monitor_config(struct i40e_hw *hw,
1308                                        u8 num_tc, u8 num_ports)
1309 {
1310         u32 threshold;
1311         u32 fifo_size;
1312         u32 reg;
1313
1314         /* Set the threshold and fifo_size based on number of ports */
1315         switch (num_ports) {
1316         case 1:
1317                 threshold = I40E_DCB_1_PORT_THRESHOLD;
1318                 fifo_size = I40E_DCB_1_PORT_FIFO_SIZE;
1319                 break;
1320         case 2:
1321                 if (num_tc > 4) {
1322                         threshold = I40E_DCB_2_PORT_THRESHOLD_HIGH_NUM_TC;
1323                         fifo_size = I40E_DCB_2_PORT_FIFO_SIZE_HIGH_NUM_TC;
1324                 } else {
1325                         threshold = I40E_DCB_2_PORT_THRESHOLD_LOW_NUM_TC;
1326                         fifo_size = I40E_DCB_2_PORT_FIFO_SIZE_LOW_NUM_TC;
1327                 }
1328                 break;
1329         case 4:
1330                 if (num_tc > 4) {
1331                         threshold = I40E_DCB_4_PORT_THRESHOLD_HIGH_NUM_TC;
1332                         fifo_size = I40E_DCB_4_PORT_FIFO_SIZE_HIGH_NUM_TC;
1333                 } else {
1334                         threshold = I40E_DCB_4_PORT_THRESHOLD_LOW_NUM_TC;
1335                         fifo_size = I40E_DCB_4_PORT_FIFO_SIZE_LOW_NUM_TC;
1336                 }
1337                 break;
1338         default:
1339                 i40e_debug(hw, I40E_DEBUG_DCB, "Invalid num_ports %u.\n",
1340                            (u32)num_ports);
1341                 return;
1342         }
1343
1344         /* The hardware manual describes setting up of I40E_PRT_SWR_PM_THR
1345          * based on the number of ports and traffic classes for a given port as
1346          * part of DCB configuration.
1347          */
1348         reg = rd32(hw, I40E_PRT_SWR_PM_THR);
1349         reg &= ~I40E_PRT_SWR_PM_THR_THRESHOLD_MASK;
1350         reg |= FIELD_PREP(I40E_PRT_SWR_PM_THR_THRESHOLD_MASK, threshold);
1351         wr32(hw, I40E_PRT_SWR_PM_THR, reg);
1352
1353         reg = rd32(hw, I40E_PRTDCB_RPPMC);
1354         reg &= ~I40E_PRTDCB_RPPMC_RX_FIFO_SIZE_MASK;
1355         reg |= FIELD_PREP(I40E_PRTDCB_RPPMC_RX_FIFO_SIZE_MASK, fifo_size);
1356         wr32(hw, I40E_PRTDCB_RPPMC, reg);
1357 }
1358
1359 /**
1360  * i40e_dcb_hw_pfc_config
1361  * @hw: pointer to the hw struct
1362  * @pfc_en: Bitmap of PFC enabled priorities
1363  * @prio_tc: priority to tc assignment indexed by priority
1364  *
1365  * Configure HW Priority Flow Controller as part of DCB configuration.
1366  **/
1367 void i40e_dcb_hw_pfc_config(struct i40e_hw *hw,
1368                             u8 pfc_en, u8 *prio_tc)
1369 {
1370         u16 refresh_time = (u16)I40E_DEFAULT_PAUSE_TIME / 2;
1371         u32 link_speed = hw->phy.link_info.link_speed;
1372         u8 first_pfc_prio = 0;
1373         u8 num_pfc_tc = 0;
1374         u8 tc2pfc = 0;
1375         u32 reg;
1376         u8 i;
1377
1378         /* Get Number of PFC TCs and TC2PFC map */
1379         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
1380                 if (pfc_en & BIT(i)) {
1381                         if (!first_pfc_prio)
1382                                 first_pfc_prio = i;
1383                         /* Set bit for the PFC TC */
1384                         tc2pfc |= BIT(prio_tc[i]);
1385                         num_pfc_tc++;
1386                 }
1387         }
1388
1389         switch (link_speed) {
1390         case I40E_LINK_SPEED_10GB:
1391                 reg = rd32(hw, I40E_PRTDCB_MFLCN);
1392                 reg |= BIT(I40E_PRTDCB_MFLCN_DPF_SHIFT) &
1393                         I40E_PRTDCB_MFLCN_DPF_MASK;
1394                 reg &= ~I40E_PRTDCB_MFLCN_RFCE_MASK;
1395                 reg &= ~I40E_PRTDCB_MFLCN_RPFCE_MASK;
1396                 if (pfc_en) {
1397                         reg |= FIELD_PREP(I40E_PRTDCB_MFLCN_RPFCM_MASK, 1);
1398                         reg |= FIELD_PREP(I40E_PRTDCB_MFLCN_RPFCE_MASK,
1399                                           pfc_en);
1400                 }
1401                 wr32(hw, I40E_PRTDCB_MFLCN, reg);
1402
1403                 reg = rd32(hw, I40E_PRTDCB_FCCFG);
1404                 reg &= ~I40E_PRTDCB_FCCFG_TFCE_MASK;
1405                 if (pfc_en)
1406                         reg |= FIELD_PREP(I40E_PRTDCB_FCCFG_TFCE_MASK,
1407                                           I40E_DCB_PFC_ENABLED);
1408                 wr32(hw, I40E_PRTDCB_FCCFG, reg);
1409
1410                 /* FCTTV and FCRTV to be set by default */
1411                 break;
1412         case I40E_LINK_SPEED_40GB:
1413                 reg = rd32(hw, I40E_PRTMAC_HSEC_CTL_RX_ENABLE_GPP);
1414                 reg &= ~I40E_PRTMAC_HSEC_CTL_RX_ENABLE_GPP_MASK;
1415                 wr32(hw, I40E_PRTMAC_HSEC_CTL_RX_ENABLE_GPP, reg);
1416
1417                 reg = rd32(hw, I40E_PRTMAC_HSEC_CTL_RX_ENABLE_PPP);
1418                 reg &= ~I40E_PRTMAC_HSEC_CTL_RX_ENABLE_GPP_MASK;
1419                 reg |= BIT(I40E_PRTMAC_HSEC_CTL_RX_ENABLE_PPP_SHIFT) &
1420                         I40E_PRTMAC_HSEC_CTL_RX_ENABLE_PPP_MASK;
1421                 wr32(hw, I40E_PRTMAC_HSEC_CTL_RX_ENABLE_PPP, reg);
1422
1423                 reg = rd32(hw, I40E_PRTMAC_HSEC_CTL_RX_PAUSE_ENABLE);
1424                 reg &= ~I40E_PRTMAC_HSEC_CTL_RX_PAUSE_ENABLE_MASK;
1425                 reg |= FIELD_PREP(I40E_PRTMAC_HSEC_CTL_RX_PAUSE_ENABLE_MASK,
1426                                   pfc_en);
1427                 wr32(hw, I40E_PRTMAC_HSEC_CTL_RX_PAUSE_ENABLE, reg);
1428
1429                 reg = rd32(hw, I40E_PRTMAC_HSEC_CTL_TX_PAUSE_ENABLE);
1430                 reg &= ~I40E_PRTMAC_HSEC_CTL_TX_PAUSE_ENABLE_MASK;
1431                 reg |= FIELD_PREP(I40E_PRTMAC_HSEC_CTL_TX_PAUSE_ENABLE_MASK,
1432                                   pfc_en);
1433                 wr32(hw, I40E_PRTMAC_HSEC_CTL_TX_PAUSE_ENABLE, reg);
1434
1435                 for (i = 0; i < I40E_PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER_MAX_INDEX; i++) {
1436                         reg = rd32(hw, I40E_PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER(i));
1437                         reg &= ~I40E_PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER_MASK;
1438                         if (pfc_en) {
1439                                 reg |= FIELD_PREP(I40E_PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER_MASK,
1440                                                   refresh_time);
1441                         }
1442                         wr32(hw, I40E_PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER(i), reg);
1443                 }
1444                 /* PRTMAC_HSEC_CTL_TX_PAUSE_QUANTA default value is 0xFFFF
1445                  * for all user priorities
1446                  */
1447                 break;
1448         }
1449
1450         reg = rd32(hw, I40E_PRTDCB_TC2PFC);
1451         reg &= ~I40E_PRTDCB_TC2PFC_TC2PFC_MASK;
1452         reg |= FIELD_PREP(I40E_PRTDCB_TC2PFC_TC2PFC_MASK, tc2pfc);
1453         wr32(hw, I40E_PRTDCB_TC2PFC, reg);
1454
1455         reg = rd32(hw, I40E_PRTDCB_RUP);
1456         reg &= ~I40E_PRTDCB_RUP_NOVLANUP_MASK;
1457         reg |= FIELD_PREP(I40E_PRTDCB_RUP_NOVLANUP_MASK, first_pfc_prio);
1458         wr32(hw, I40E_PRTDCB_RUP, reg);
1459
1460         reg = rd32(hw, I40E_PRTDCB_TDPMC);
1461         reg &= ~I40E_PRTDCB_TDPMC_TCPM_MODE_MASK;
1462         if (num_pfc_tc > I40E_DCB_PFC_FORCED_NUM_TC) {
1463                 reg |= BIT(I40E_PRTDCB_TDPMC_TCPM_MODE_SHIFT) &
1464                         I40E_PRTDCB_TDPMC_TCPM_MODE_MASK;
1465         }
1466         wr32(hw, I40E_PRTDCB_TDPMC, reg);
1467
1468         reg = rd32(hw, I40E_PRTDCB_TCPMC);
1469         reg &= ~I40E_PRTDCB_TCPMC_TCPM_MODE_MASK;
1470         if (num_pfc_tc > I40E_DCB_PFC_FORCED_NUM_TC) {
1471                 reg |= BIT(I40E_PRTDCB_TCPMC_TCPM_MODE_SHIFT) &
1472                         I40E_PRTDCB_TCPMC_TCPM_MODE_MASK;
1473         }
1474         wr32(hw, I40E_PRTDCB_TCPMC, reg);
1475 }
1476
1477 /**
1478  * i40e_dcb_hw_set_num_tc
1479  * @hw: pointer to the hw struct
1480  * @num_tc: number of traffic classes
1481  *
1482  * Configure number of traffic classes in HW
1483  **/
1484 void i40e_dcb_hw_set_num_tc(struct i40e_hw *hw, u8 num_tc)
1485 {
1486         u32 reg = rd32(hw, I40E_PRTDCB_GENC);
1487
1488         reg &= ~I40E_PRTDCB_GENC_NUMTC_MASK;
1489         reg |= FIELD_PREP(I40E_PRTDCB_GENC_NUMTC_MASK, num_tc);
1490         wr32(hw, I40E_PRTDCB_GENC, reg);
1491 }
1492
1493 /**
1494  * i40e_dcb_hw_rx_ets_bw_config
1495  * @hw: pointer to the hw struct
1496  * @bw_share: Bandwidth share indexed per traffic class
1497  * @mode: Strict Priority or Round Robin mode between UP sharing same
1498  * traffic class
1499  * @prio_type: TC is ETS enabled or strict priority
1500  *
1501  * Configure HW Rx ETS bandwidth as part of DCB configuration.
1502  **/
1503 void i40e_dcb_hw_rx_ets_bw_config(struct i40e_hw *hw, u8 *bw_share,
1504                                   u8 *mode, u8 *prio_type)
1505 {
1506         u32 reg;
1507         u8 i;
1508
1509         for (i = 0; i <= I40E_PRTDCB_RETSTCC_MAX_INDEX; i++) {
1510                 reg = rd32(hw, I40E_PRTDCB_RETSTCC(i));
1511                 reg &= ~(I40E_PRTDCB_RETSTCC_BWSHARE_MASK     |
1512                          I40E_PRTDCB_RETSTCC_UPINTC_MODE_MASK |
1513                          I40E_PRTDCB_RETSTCC_ETSTC_MASK);
1514                 reg |= FIELD_PREP(I40E_PRTDCB_RETSTCC_BWSHARE_MASK,
1515                                   bw_share[i]);
1516                 reg |= FIELD_PREP(I40E_PRTDCB_RETSTCC_UPINTC_MODE_MASK,
1517                                   mode[i]);
1518                 reg |= FIELD_PREP(I40E_PRTDCB_RETSTCC_ETSTC_MASK,
1519                                   prio_type[i]);
1520                 wr32(hw, I40E_PRTDCB_RETSTCC(i), reg);
1521         }
1522 }
1523
1524 /**
1525  * i40e_dcb_hw_rx_up2tc_config
1526  * @hw: pointer to the hw struct
1527  * @prio_tc: priority to tc assignment indexed by priority
1528  *
1529  * Configure HW Rx UP2TC map as part of DCB configuration.
1530  **/
1531 void i40e_dcb_hw_rx_up2tc_config(struct i40e_hw *hw, u8 *prio_tc)
1532 {
1533         u32 reg = rd32(hw, I40E_PRTDCB_RUP2TC);
1534 #define I40E_UP2TC_REG(val, i) \
1535                 (((val) << I40E_PRTDCB_RUP2TC_UP##i##TC_SHIFT) & \
1536                   I40E_PRTDCB_RUP2TC_UP##i##TC_MASK)
1537
1538         reg |= I40E_UP2TC_REG(prio_tc[0], 0);
1539         reg |= I40E_UP2TC_REG(prio_tc[1], 1);
1540         reg |= I40E_UP2TC_REG(prio_tc[2], 2);
1541         reg |= I40E_UP2TC_REG(prio_tc[3], 3);
1542         reg |= I40E_UP2TC_REG(prio_tc[4], 4);
1543         reg |= I40E_UP2TC_REG(prio_tc[5], 5);
1544         reg |= I40E_UP2TC_REG(prio_tc[6], 6);
1545         reg |= I40E_UP2TC_REG(prio_tc[7], 7);
1546
1547         wr32(hw, I40E_PRTDCB_RUP2TC, reg);
1548 }
1549
1550 /**
1551  * i40e_dcb_hw_calculate_pool_sizes - configure dcb pool sizes
1552  * @hw: pointer to the hw struct
1553  * @num_ports: Number of available ports on the device
1554  * @eee_enabled: EEE enabled for the given port
1555  * @pfc_en: Bit map of PFC enabled traffic classes
1556  * @mfs_tc: Array of max frame size for each traffic class
1557  * @pb_cfg: pointer to packet buffer configuration
1558  *
1559  * Calculate the shared and dedicated per TC pool sizes,
1560  * watermarks and threshold values.
1561  **/
1562 void i40e_dcb_hw_calculate_pool_sizes(struct i40e_hw *hw,
1563                                       u8 num_ports, bool eee_enabled,
1564                                       u8 pfc_en, u32 *mfs_tc,
1565                                       struct i40e_rx_pb_config *pb_cfg)
1566 {
1567         u32 pool_size[I40E_MAX_TRAFFIC_CLASS];
1568         u32 high_wm[I40E_MAX_TRAFFIC_CLASS];
1569         u32 low_wm[I40E_MAX_TRAFFIC_CLASS];
1570         u32 total_pool_size = 0;
1571         int shared_pool_size; /* Need signed variable */
1572         u32 port_pb_size;
1573         u32 mfs_max = 0;
1574         u32 pcirtt;
1575         u8 i;
1576
1577         /* Get the MFS(max) for the port */
1578         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1579                 if (mfs_tc[i] > mfs_max)
1580                         mfs_max = mfs_tc[i];
1581         }
1582
1583         pcirtt = I40E_BT2B(I40E_PCIRTT_LINK_SPEED_10G);
1584
1585         /* Calculate effective Rx PB size per port */
1586         port_pb_size = I40E_DEVICE_RPB_SIZE / num_ports;
1587         if (eee_enabled)
1588                 port_pb_size -= I40E_BT2B(I40E_EEE_TX_LPI_EXIT_TIME);
1589         port_pb_size -= mfs_max;
1590
1591         /* Step 1 Calculating tc pool/shared pool sizes and watermarks */
1592         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1593                 if (pfc_en & BIT(i)) {
1594                         low_wm[i] = (I40E_DCB_WATERMARK_START_FACTOR *
1595                                      mfs_tc[i]) + pcirtt;
1596                         high_wm[i] = low_wm[i];
1597                         high_wm[i] += ((mfs_max > I40E_MAX_FRAME_SIZE)
1598                                         ? mfs_max : I40E_MAX_FRAME_SIZE);
1599                         pool_size[i] = high_wm[i];
1600                         pool_size[i] += I40E_BT2B(I40E_STD_DV_TC(mfs_max,
1601                                                                 mfs_tc[i]));
1602                 } else {
1603                         low_wm[i] = 0;
1604                         pool_size[i] = (I40E_DCB_WATERMARK_START_FACTOR *
1605                                         mfs_tc[i]) + pcirtt;
1606                         high_wm[i] = pool_size[i];
1607                 }
1608                 total_pool_size += pool_size[i];
1609         }
1610
1611         shared_pool_size = port_pb_size - total_pool_size;
1612         if (shared_pool_size > 0) {
1613                 pb_cfg->shared_pool_size = shared_pool_size;
1614                 pb_cfg->shared_pool_high_wm = shared_pool_size;
1615                 pb_cfg->shared_pool_low_wm = 0;
1616                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1617                         pb_cfg->shared_pool_low_thresh[i] = 0;
1618                         pb_cfg->shared_pool_high_thresh[i] = shared_pool_size;
1619                         pb_cfg->tc_pool_size[i] = pool_size[i];
1620                         pb_cfg->tc_pool_high_wm[i] = high_wm[i];
1621                         pb_cfg->tc_pool_low_wm[i] = low_wm[i];
1622                 }
1623
1624         } else {
1625                 i40e_debug(hw, I40E_DEBUG_DCB,
1626                            "The shared pool size for the port is negative %d.\n",
1627                            shared_pool_size);
1628         }
1629 }
1630
1631 /**
1632  * i40e_dcb_hw_rx_pb_config
1633  * @hw: pointer to the hw struct
1634  * @old_pb_cfg: Existing Rx Packet buffer configuration
1635  * @new_pb_cfg: New Rx Packet buffer configuration
1636  *
1637  * Program the Rx Packet Buffer registers.
1638  **/
1639 void i40e_dcb_hw_rx_pb_config(struct i40e_hw *hw,
1640                               struct i40e_rx_pb_config *old_pb_cfg,
1641                               struct i40e_rx_pb_config *new_pb_cfg)
1642 {
1643         u32 old_val;
1644         u32 new_val;
1645         u32 reg;
1646         u8 i;
1647
1648         /* The Rx Packet buffer register programming needs to be done in a
1649          * certain order and the following code is based on that
1650          * requirement.
1651          */
1652
1653         /* Program the shared pool low water mark per port if decreasing */
1654         old_val = old_pb_cfg->shared_pool_low_wm;
1655         new_val = new_pb_cfg->shared_pool_low_wm;
1656         if (new_val < old_val) {
1657                 reg = rd32(hw, I40E_PRTRPB_SLW);
1658                 reg &= ~I40E_PRTRPB_SLW_SLW_MASK;
1659                 reg |= FIELD_PREP(I40E_PRTRPB_SLW_SLW_MASK, new_val);
1660                 wr32(hw, I40E_PRTRPB_SLW, reg);
1661         }
1662
1663         /* Program the shared pool low threshold and tc pool
1664          * low water mark per TC that are decreasing.
1665          */
1666         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1667                 old_val = old_pb_cfg->shared_pool_low_thresh[i];
1668                 new_val = new_pb_cfg->shared_pool_low_thresh[i];
1669                 if (new_val < old_val) {
1670                         reg = rd32(hw, I40E_PRTRPB_SLT(i));
1671                         reg &= ~I40E_PRTRPB_SLT_SLT_TCN_MASK;
1672                         reg |= FIELD_PREP(I40E_PRTRPB_SLT_SLT_TCN_MASK,
1673                                           new_val);
1674                         wr32(hw, I40E_PRTRPB_SLT(i), reg);
1675                 }
1676
1677                 old_val = old_pb_cfg->tc_pool_low_wm[i];
1678                 new_val = new_pb_cfg->tc_pool_low_wm[i];
1679                 if (new_val < old_val) {
1680                         reg = rd32(hw, I40E_PRTRPB_DLW(i));
1681                         reg &= ~I40E_PRTRPB_DLW_DLW_TCN_MASK;
1682                         reg |= FIELD_PREP(I40E_PRTRPB_DLW_DLW_TCN_MASK,
1683                                           new_val);
1684                         wr32(hw, I40E_PRTRPB_DLW(i), reg);
1685                 }
1686         }
1687
1688         /* Program the shared pool high water mark per port if decreasing */
1689         old_val = old_pb_cfg->shared_pool_high_wm;
1690         new_val = new_pb_cfg->shared_pool_high_wm;
1691         if (new_val < old_val) {
1692                 reg = rd32(hw, I40E_PRTRPB_SHW);
1693                 reg &= ~I40E_PRTRPB_SHW_SHW_MASK;
1694                 reg |= FIELD_PREP(I40E_PRTRPB_SHW_SHW_MASK, new_val);
1695                 wr32(hw, I40E_PRTRPB_SHW, reg);
1696         }
1697
1698         /* Program the shared pool high threshold and tc pool
1699          * high water mark per TC that are decreasing.
1700          */
1701         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1702                 old_val = old_pb_cfg->shared_pool_high_thresh[i];
1703                 new_val = new_pb_cfg->shared_pool_high_thresh[i];
1704                 if (new_val < old_val) {
1705                         reg = rd32(hw, I40E_PRTRPB_SHT(i));
1706                         reg &= ~I40E_PRTRPB_SHT_SHT_TCN_MASK;
1707                         reg |= FIELD_PREP(I40E_PRTRPB_SHT_SHT_TCN_MASK,
1708                                           new_val);
1709                         wr32(hw, I40E_PRTRPB_SHT(i), reg);
1710                 }
1711
1712                 old_val = old_pb_cfg->tc_pool_high_wm[i];
1713                 new_val = new_pb_cfg->tc_pool_high_wm[i];
1714                 if (new_val < old_val) {
1715                         reg = rd32(hw, I40E_PRTRPB_DHW(i));
1716                         reg &= ~I40E_PRTRPB_DHW_DHW_TCN_MASK;
1717                         reg |= FIELD_PREP(I40E_PRTRPB_DHW_DHW_TCN_MASK,
1718                                           new_val);
1719                         wr32(hw, I40E_PRTRPB_DHW(i), reg);
1720                 }
1721         }
1722
1723         /* Write Dedicated Pool Sizes per TC */
1724         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1725                 new_val = new_pb_cfg->tc_pool_size[i];
1726                 reg = rd32(hw, I40E_PRTRPB_DPS(i));
1727                 reg &= ~I40E_PRTRPB_DPS_DPS_TCN_MASK;
1728                 reg |= FIELD_PREP(I40E_PRTRPB_DPS_DPS_TCN_MASK, new_val);
1729                 wr32(hw, I40E_PRTRPB_DPS(i), reg);
1730         }
1731
1732         /* Write Shared Pool Size per port */
1733         new_val = new_pb_cfg->shared_pool_size;
1734         reg = rd32(hw, I40E_PRTRPB_SPS);
1735         reg &= ~I40E_PRTRPB_SPS_SPS_MASK;
1736         reg |= FIELD_PREP(I40E_PRTRPB_SPS_SPS_MASK, new_val);
1737         wr32(hw, I40E_PRTRPB_SPS, reg);
1738
1739         /* Program the shared pool low water mark per port if increasing */
1740         old_val = old_pb_cfg->shared_pool_low_wm;
1741         new_val = new_pb_cfg->shared_pool_low_wm;
1742         if (new_val > old_val) {
1743                 reg = rd32(hw, I40E_PRTRPB_SLW);
1744                 reg &= ~I40E_PRTRPB_SLW_SLW_MASK;
1745                 reg |= FIELD_PREP(I40E_PRTRPB_SLW_SLW_MASK, new_val);
1746                 wr32(hw, I40E_PRTRPB_SLW, reg);
1747         }
1748
1749         /* Program the shared pool low threshold and tc pool
1750          * low water mark per TC that are increasing.
1751          */
1752         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1753                 old_val = old_pb_cfg->shared_pool_low_thresh[i];
1754                 new_val = new_pb_cfg->shared_pool_low_thresh[i];
1755                 if (new_val > old_val) {
1756                         reg = rd32(hw, I40E_PRTRPB_SLT(i));
1757                         reg &= ~I40E_PRTRPB_SLT_SLT_TCN_MASK;
1758                         reg |= FIELD_PREP(I40E_PRTRPB_SLT_SLT_TCN_MASK,
1759                                           new_val);
1760                         wr32(hw, I40E_PRTRPB_SLT(i), reg);
1761                 }
1762
1763                 old_val = old_pb_cfg->tc_pool_low_wm[i];
1764                 new_val = new_pb_cfg->tc_pool_low_wm[i];
1765                 if (new_val > old_val) {
1766                         reg = rd32(hw, I40E_PRTRPB_DLW(i));
1767                         reg &= ~I40E_PRTRPB_DLW_DLW_TCN_MASK;
1768                         reg |= FIELD_PREP(I40E_PRTRPB_DLW_DLW_TCN_MASK,
1769                                           new_val);
1770                         wr32(hw, I40E_PRTRPB_DLW(i), reg);
1771                 }
1772         }
1773
1774         /* Program the shared pool high water mark per port if increasing */
1775         old_val = old_pb_cfg->shared_pool_high_wm;
1776         new_val = new_pb_cfg->shared_pool_high_wm;
1777         if (new_val > old_val) {
1778                 reg = rd32(hw, I40E_PRTRPB_SHW);
1779                 reg &= ~I40E_PRTRPB_SHW_SHW_MASK;
1780                 reg |= FIELD_PREP(I40E_PRTRPB_SHW_SHW_MASK, new_val);
1781                 wr32(hw, I40E_PRTRPB_SHW, reg);
1782         }
1783
1784         /* Program the shared pool high threshold and tc pool
1785          * high water mark per TC that are increasing.
1786          */
1787         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1788                 old_val = old_pb_cfg->shared_pool_high_thresh[i];
1789                 new_val = new_pb_cfg->shared_pool_high_thresh[i];
1790                 if (new_val > old_val) {
1791                         reg = rd32(hw, I40E_PRTRPB_SHT(i));
1792                         reg &= ~I40E_PRTRPB_SHT_SHT_TCN_MASK;
1793                         reg |= FIELD_PREP(I40E_PRTRPB_SHT_SHT_TCN_MASK,
1794                                           new_val);
1795                         wr32(hw, I40E_PRTRPB_SHT(i), reg);
1796                 }
1797
1798                 old_val = old_pb_cfg->tc_pool_high_wm[i];
1799                 new_val = new_pb_cfg->tc_pool_high_wm[i];
1800                 if (new_val > old_val) {
1801                         reg = rd32(hw, I40E_PRTRPB_DHW(i));
1802                         reg &= ~I40E_PRTRPB_DHW_DHW_TCN_MASK;
1803                         reg |= FIELD_PREP(I40E_PRTRPB_DHW_DHW_TCN_MASK,
1804                                           new_val);
1805                         wr32(hw, I40E_PRTRPB_DHW(i), reg);
1806                 }
1807         }
1808 }
1809
1810 /**
1811  * _i40e_read_lldp_cfg - generic read of LLDP Configuration data from NVM
1812  * @hw: pointer to the HW structure
1813  * @lldp_cfg: pointer to hold lldp configuration variables
1814  * @module: address of the module pointer
1815  * @word_offset: offset of LLDP configuration
1816  *
1817  * Reads the LLDP configuration data from NVM using passed addresses
1818  **/
1819 static int _i40e_read_lldp_cfg(struct i40e_hw *hw,
1820                                struct i40e_lldp_variables *lldp_cfg,
1821                                u8 module, u32 word_offset)
1822 {
1823         u32 address, offset = (2 * word_offset);
1824         __le16 raw_mem;
1825         int ret;
1826         u16 mem;
1827
1828         ret = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
1829         if (ret)
1830                 return ret;
1831
1832         ret = i40e_aq_read_nvm(hw, 0x0, module * 2, sizeof(raw_mem), &raw_mem,
1833                                true, NULL);
1834         i40e_release_nvm(hw);
1835         if (ret)
1836                 return ret;
1837
1838         mem = le16_to_cpu(raw_mem);
1839         /* Check if this pointer needs to be read in word size or 4K sector
1840          * units.
1841          */
1842         if (mem & I40E_PTR_TYPE)
1843                 address = (0x7FFF & mem) * 4096;
1844         else
1845                 address = (0x7FFF & mem) * 2;
1846
1847         ret = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
1848         if (ret)
1849                 goto err_lldp_cfg;
1850
1851         ret = i40e_aq_read_nvm(hw, module, offset, sizeof(raw_mem), &raw_mem,
1852                                true, NULL);
1853         i40e_release_nvm(hw);
1854         if (ret)
1855                 return ret;
1856
1857         mem = le16_to_cpu(raw_mem);
1858         offset = mem + word_offset;
1859         offset *= 2;
1860
1861         ret = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
1862         if (ret)
1863                 goto err_lldp_cfg;
1864
1865         ret = i40e_aq_read_nvm(hw, 0, address + offset,
1866                                sizeof(struct i40e_lldp_variables), lldp_cfg,
1867                                true, NULL);
1868         i40e_release_nvm(hw);
1869
1870 err_lldp_cfg:
1871         return ret;
1872 }
1873
1874 /**
1875  * i40e_read_lldp_cfg - read LLDP Configuration data from NVM
1876  * @hw: pointer to the HW structure
1877  * @lldp_cfg: pointer to hold lldp configuration variables
1878  *
1879  * Reads the LLDP configuration data from NVM
1880  **/
1881 int i40e_read_lldp_cfg(struct i40e_hw *hw,
1882                        struct i40e_lldp_variables *lldp_cfg)
1883 {
1884         int ret = 0;
1885         u32 mem;
1886
1887         if (!lldp_cfg)
1888                 return -EINVAL;
1889
1890         ret = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
1891         if (ret)
1892                 return ret;
1893
1894         ret = i40e_aq_read_nvm(hw, I40E_SR_NVM_CONTROL_WORD, 0, sizeof(mem),
1895                                &mem, true, NULL);
1896         i40e_release_nvm(hw);
1897         if (ret)
1898                 return ret;
1899
1900         /* Read a bit that holds information whether we are running flat or
1901          * structured NVM image. Flat image has LLDP configuration in shadow
1902          * ram, so there is a need to pass different addresses for both cases.
1903          */
1904         if (mem & I40E_SR_NVM_MAP_STRUCTURE_TYPE) {
1905                 /* Flat NVM case */
1906                 ret = _i40e_read_lldp_cfg(hw, lldp_cfg, I40E_SR_EMP_MODULE_PTR,
1907                                           I40E_SR_LLDP_CFG_PTR);
1908         } else {
1909                 /* Good old structured NVM image */
1910                 ret = _i40e_read_lldp_cfg(hw, lldp_cfg, I40E_EMP_MODULE_PTR,
1911                                           I40E_NVM_LLDP_CFG_PTR);
1912         }
1913
1914         return ret;
1915 }