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_ieee_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_org_tlv
 296  * @tlv: Organization specific TLV
 297  * @dcbcfg: Local store to update ETS REC data
 298  *
 299  * Currently only IEEE 802.1Qaz TLV is supported, all others
 300  * will be returned
 301  **/
 302 static void i40e_parse_org_tlv(struct i40e_lldp_org_tlv *tlv,
 303                                struct i40e_dcbx_config *dcbcfg)
 304 {
 305         u32 ouisubtype;
 306         u32 oui;
 307
 308         ouisubtype = ntohl(tlv->ouisubtype);
 309         oui = (u32)((ouisubtype & I40E_LLDP_TLV_OUI_MASK) >>
 310                     I40E_LLDP_TLV_OUI_SHIFT);
 311         switch (oui) {
 312         case I40E_IEEE_8021QAZ_OUI:
 313                 i40e_parse_ieee_tlv(tlv, dcbcfg);
 314                 break;
 315         default:
 316                 break;
 317         }
 318 }
 319
 320 /**
 321  * i40e_lldp_to_dcb_config
 322  * @lldpmib: LLDPDU to be parsed
 323  * @dcbcfg: store for LLDPDU data
 324  *
 325  * Parse DCB configuration from the LLDPDU
 326  **/
 327 i40e_status i40e_lldp_to_dcb_config(u8 *lldpmib,
 328                                     struct i40e_dcbx_config *dcbcfg)
 329 {
 330         i40e_status ret = 0;
 331         struct i40e_lldp_org_tlv *tlv;
 332         u16 type;
 333         u16 length;
 334         u16 typelength;
 335         u16 offset = 0;
 336
 337         if (!lldpmib || !dcbcfg)
 338                 return I40E_ERR_PARAM;
 339
 340         /* set to the start of LLDPDU */
 341         lldpmib += ETH_HLEN;
 342         tlv = (struct i40e_lldp_org_tlv *)lldpmib;
 343         while (1) {
 344                 typelength = ntohs(tlv->typelength);
 345                 type = (u16)((typelength & I40E_LLDP_TLV_TYPE_MASK) >>
 346                              I40E_LLDP_TLV_TYPE_SHIFT);
 347                 length = (u16)((typelength & I40E_LLDP_TLV_LEN_MASK) >>
 348                                I40E_LLDP_TLV_LEN_SHIFT);
 349                 offset += sizeof(typelength) + length;
 350
 351                 /* END TLV or beyond LLDPDU size */
 352                 if ((type == I40E_TLV_TYPE_END) || (offset > I40E_LLDPDU_SIZE))
 353                         break;
 354
 355                 switch (type) {
 356                 case I40E_TLV_TYPE_ORG:
 357                         i40e_parse_org_tlv(tlv, dcbcfg);
 358                         break;
 359                 default:
 360                         break;
 361                 }
 362
 363                 /* Move to next TLV */
 364                 tlv = (struct i40e_lldp_org_tlv *)((char *)tlv +
 365                                                     sizeof(tlv->typelength) +
 366                                                     length);
 367         }
 368
 369         return ret;
 370 }
 371
 372 /**
 373  * i40e_aq_get_dcb_config
 374  * @hw: pointer to the hw struct
 375  * @mib_type: mib type for the query
 376  * @bridgetype: bridge type for the query (remote)
 377  * @dcbcfg: store for LLDPDU data
 378  *
 379  * Query DCB configuration from the Firmware
 380  **/
 381 i40e_status i40e_aq_get_dcb_config(struct i40e_hw *hw, u8 mib_type,
 382                                    u8 bridgetype,
 383                                    struct i40e_dcbx_config *dcbcfg)
 384 {
 385         i40e_status ret = 0;
 386         struct i40e_virt_mem mem;
 387         u8 *lldpmib;
 388
 389         /* Allocate the LLDPDU */
 390         ret = i40e_allocate_virt_mem(hw, &mem, I40E_LLDPDU_SIZE);
 391         if (ret)
 392                 return ret;
 393
 394         lldpmib = (u8 *)mem.va;
 395         ret = i40e_aq_get_lldp_mib(hw, bridgetype, mib_type,
 396                                    (void *)lldpmib, I40E_LLDPDU_SIZE,
 397                                    NULL, NULL, NULL);
 398         if (ret)
 399                 goto free_mem;
 400
 401         /* Parse LLDP MIB to get dcb configuration */
 402         ret = i40e_lldp_to_dcb_config(lldpmib, dcbcfg);
 403
 404 free_mem:
 405         i40e_free_virt_mem(hw, &mem);
 406         return ret;
 407 }
 408
 409 /**
 410  * i40e_get_dcb_config
 411  * @hw: pointer to the hw struct
 412  *
 413  * Get DCB configuration from the Firmware
 414  **/
 415 i40e_status i40e_get_dcb_config(struct i40e_hw *hw)
 416 {
 417         i40e_status ret = 0;
 418
 419         /* Get Local DCB Config */
 420         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_LOCAL, 0,
 421                                      &hw->local_dcbx_config);
 422         if (ret)
 423                 goto out;
 424
 425         /* Get Remote DCB Config */
 426         ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
 427                                      I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
 428                                      &hw->remote_dcbx_config);
 429 out:
 430         return ret;
 431 }
 432
 433 /**
 434  * i40e_init_dcb
 435  * @hw: pointer to the hw struct
 436  *
 437  * Update DCB configuration from the Firmware
 438  **/
 439 i40e_status i40e_init_dcb(struct i40e_hw *hw)
 440 {
 441         i40e_status ret = 0;
 442
 443         if (!hw->func_caps.dcb)
 444                 return ret;
 445
 446         /* Get DCBX status */
 447         ret = i40e_get_dcbx_status(hw, &hw->dcbx_status);
 448         if (ret)
 449                 return ret;
 450
 451         /* Check the DCBX Status */
 452         switch (hw->dcbx_status) {
 453         case I40E_DCBX_STATUS_DONE:
 454         case I40E_DCBX_STATUS_IN_PROGRESS:
 455                 /* Get current DCBX configuration */
 456                 ret = i40e_get_dcb_config(hw);
 457                 break;
 458         case I40E_DCBX_STATUS_DISABLED:
 459                 return ret;
 460         case I40E_DCBX_STATUS_NOT_STARTED:
 461         case I40E_DCBX_STATUS_MULTIPLE_PEERS:
 462         default:
 463                 break;
 464         }
 465
 466         /* Configure the LLDP MIB change event */
 467         ret = i40e_aq_cfg_lldp_mib_change_event(hw, true, NULL);
 468         if (ret)
 469                 return ret;
 470
 471         return ret;
 472 }