drivers/net/ixgbe/ixgbe_dcb_nl.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2011 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 with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "ixgbe.h"
  30 #include <linux/dcbnl.h>
  31 #include "ixgbe_dcb_82598.h"
  32 #include "ixgbe_dcb_82599.h"
  33
  34 /* Callbacks for DCB netlink in the kernel */
  35 #define BIT_DCB_MODE    0x01
  36 #define BIT_PFC         0x02
  37 #define BIT_PG_RX       0x04
  38 #define BIT_PG_TX       0x08
  39 #define BIT_APP_UPCHG   0x10
  40 #define BIT_LINKSPEED   0x80
  41
  42 /* Responses for the DCB_C_SET_ALL command */
  43 #define DCB_HW_CHG_RST  0  /* DCB configuration changed with reset */
  44 #define DCB_NO_HW_CHG   1  /* DCB configuration did not change */
  45 #define DCB_HW_CHG      2  /* DCB configuration changed, no reset */
  46
  47 int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
  48                        struct ixgbe_dcb_config *dst_dcb_cfg, int tc_max)
  49 {
  50         struct tc_configuration *src_tc_cfg = NULL;
  51         struct tc_configuration *dst_tc_cfg = NULL;
  52         int i;
  53
  54         if (!src_dcb_cfg || !dst_dcb_cfg)
  55                 return -EINVAL;
  56
  57         for (i = DCB_PG_ATTR_TC_0; i < tc_max + DCB_PG_ATTR_TC_0; i++) {
  58                 src_tc_cfg = &src_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
  59                 dst_tc_cfg = &dst_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
  60
  61                 dst_tc_cfg->path[DCB_TX_CONFIG].prio_type =
  62                                 src_tc_cfg->path[DCB_TX_CONFIG].prio_type;
  63
  64                 dst_tc_cfg->path[DCB_TX_CONFIG].bwg_id =
  65                                 src_tc_cfg->path[DCB_TX_CONFIG].bwg_id;
  66
  67                 dst_tc_cfg->path[DCB_TX_CONFIG].bwg_percent =
  68                                 src_tc_cfg->path[DCB_TX_CONFIG].bwg_percent;
  69
  70                 dst_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap =
  71                                 src_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap;
  72
  73                 dst_tc_cfg->path[DCB_RX_CONFIG].prio_type =
  74                                 src_tc_cfg->path[DCB_RX_CONFIG].prio_type;
  75
  76                 dst_tc_cfg->path[DCB_RX_CONFIG].bwg_id =
  77                                 src_tc_cfg->path[DCB_RX_CONFIG].bwg_id;
  78
  79                 dst_tc_cfg->path[DCB_RX_CONFIG].bwg_percent =
  80                                 src_tc_cfg->path[DCB_RX_CONFIG].bwg_percent;
  81
  82                 dst_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap =
  83                                 src_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap;
  84         }
  85
  86         for (i = DCB_PG_ATTR_BW_ID_0; i < DCB_PG_ATTR_BW_ID_MAX; i++) {
  87                 dst_dcb_cfg->bw_percentage[DCB_TX_CONFIG]
  88                         [i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
  89                                 [DCB_TX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
  90                 dst_dcb_cfg->bw_percentage[DCB_RX_CONFIG]
  91                         [i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
  92                                 [DCB_RX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
  93         }
  94
  95         for (i = DCB_PFC_UP_ATTR_0; i < DCB_PFC_UP_ATTR_MAX; i++) {
  96                 dst_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc =
  97                         src_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc;
  98         }
  99
 100         dst_dcb_cfg->pfc_mode_enable = src_dcb_cfg->pfc_mode_enable;
 101
 102         return 0;
 103 }
 104
 105 static u8 ixgbe_dcbnl_get_state(struct net_device *netdev)
 106 {
 107         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 108
 109         return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
 110 }
 111
 112 static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
 113 {
 114         u8 err = 0;
 115         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 116
 117         if (state > 0) {
 118                 /* Turn on DCB */
 119                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
 120                         goto out;
 121
 122                 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
 123                         e_err(drv, "Enable failed, needs MSI-X\n");
 124                         err = 1;
 125                         goto out;
 126                 }
 127
 128                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
 129
 130                 switch (adapter->hw.mac.type) {
 131                 case ixgbe_mac_82598EB:
 132                         adapter->last_lfc_mode = adapter->hw.fc.current_mode;
 133                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
 134                         break;
 135                 case ixgbe_mac_82599EB:
 136                 case ixgbe_mac_X540:
 137                         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
 138                         break;
 139                 default:
 140                         break;
 141                 }
 142
 143                 ixgbe_setup_tc(netdev, MAX_TRAFFIC_CLASS);
 144         } else {
 145                 /* Turn off DCB */
 146                 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
 147                         goto out;
 148
 149                 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
 150                 adapter->temp_dcb_cfg.pfc_mode_enable = false;
 151                 adapter->dcb_cfg.pfc_mode_enable = false;
 152                 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
 153                 switch (adapter->hw.mac.type) {
 154                 case ixgbe_mac_82599EB:
 155                 case ixgbe_mac_X540:
 156                         adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
 157                         break;
 158                 default:
 159                         break;
 160                 }
 161                 ixgbe_setup_tc(netdev, 0);
 162         }
 163
 164 out:
 165         return err;
 166 }
 167
 168 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
 169                                          u8 *perm_addr)
 170 {
 171         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 172         int i, j;
 173
 174         memset(perm_addr, 0xff, MAX_ADDR_LEN);
 175
 176         for (i = 0; i < netdev->addr_len; i++)
 177                 perm_addr[i] = adapter->hw.mac.perm_addr[i];
 178
 179         switch (adapter->hw.mac.type) {
 180         case ixgbe_mac_82599EB:
 181         case ixgbe_mac_X540:
 182                 for (j = 0; j < netdev->addr_len; j++, i++)
 183                         perm_addr[i] = adapter->hw.mac.san_addr[j];
 184                 break;
 185         default:
 186                 break;
 187         }
 188 }
 189
 190 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 191                                          u8 prio, u8 bwg_id, u8 bw_pct,
 192                                          u8 up_map)
 193 {
 194         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 195
 196         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 197                 adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
 198         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 199                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
 200         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 201                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
 202                         bw_pct;
 203         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 204                 adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
 205                         up_map;
 206
 207         if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
 208              adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
 209             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
 210              adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
 211             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
 212              adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
 213             (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
 214              adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
 215                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 216 }
 217
 218 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 219                                           u8 bw_pct)
 220 {
 221         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 222
 223         adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
 224
 225         if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
 226             adapter->dcb_cfg.bw_percentage[0][bwg_id])
 227                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 228 }
 229
 230 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 231                                          u8 prio, u8 bwg_id, u8 bw_pct,
 232                                          u8 up_map)
 233 {
 234         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 235
 236         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 237                 adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
 238         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 239                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
 240         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 241                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
 242                         bw_pct;
 243         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 244                 adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
 245                         up_map;
 246
 247         if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
 248              adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
 249             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
 250              adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
 251             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
 252              adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
 253             (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
 254              adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
 255                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 256 }
 257
 258 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 259                                           u8 bw_pct)
 260 {
 261         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 262
 263         adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
 264
 265         if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
 266             adapter->dcb_cfg.bw_percentage[1][bwg_id])
 267                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 268 }
 269
 270 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 271                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 272                                          u8 *up_map)
 273 {
 274         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 275
 276         *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
 277         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
 278         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
 279         *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
 280 }
 281
 282 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 283                                           u8 *bw_pct)
 284 {
 285         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 286
 287         *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
 288 }
 289
 290 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 291                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 292                                          u8 *up_map)
 293 {
 294         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 295
 296         *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
 297         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
 298         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
 299         *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
 300 }
 301
 302 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 303                                           u8 *bw_pct)
 304 {
 305         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 306
 307         *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
 308 }
 309
 310 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
 311                                     u8 setting)
 312 {
 313         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 314
 315         adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
 316         if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
 317             adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
 318                 adapter->dcb_set_bitmap |= BIT_PFC;
 319                 adapter->temp_dcb_cfg.pfc_mode_enable = true;
 320         }
 321 }
 322
 323 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
 324                                     u8 *setting)
 325 {
 326         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 327
 328         *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
 329 }
 330
 331 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
 332 {
 333         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 334         struct dcb_app app = {
 335                               .selector = DCB_APP_IDTYPE_ETHTYPE,
 336                               .protocol = ETH_P_FCOE,
 337                              };
 338         u8 up = dcb_getapp(netdev, &app);
 339         int ret;
 340
 341         ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
 342                                  MAX_TRAFFIC_CLASS);
 343         if (ret)
 344                 return DCB_NO_HW_CHG;
 345
 346         /* In IEEE mode app data must be parsed into DCBX format for
 347          * hardware routines.
 348          */
 349         if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
 350                 up = (1 << up);
 351
 352 #ifdef IXGBE_FCOE
 353         if (up && (up != (1 << adapter->fcoe.up)))
 354                 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
 355
 356         /*
 357          * Only take down the adapter if an app change occurred. FCoE
 358          * may shuffle tx rings in this case and this can not be done
 359          * without a reset currently.
 360          */
 361         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
 362                 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
 363                         usleep_range(1000, 2000);
 364
 365                 ixgbe_fcoe_setapp(adapter, up);
 366
 367                 if (netif_running(netdev))
 368                         netdev->netdev_ops->ndo_stop(netdev);
 369                 ixgbe_clear_interrupt_scheme(adapter);
 370         }
 371 #endif
 372
 373         if (adapter->dcb_cfg.pfc_mode_enable) {
 374                 switch (adapter->hw.mac.type) {
 375                 case ixgbe_mac_82599EB:
 376                 case ixgbe_mac_X540:
 377                         if (adapter->hw.fc.current_mode != ixgbe_fc_pfc)
 378                                 adapter->last_lfc_mode =
 379                                                   adapter->hw.fc.current_mode;
 380                         break;
 381                 default:
 382                         break;
 383                 }
 384                 adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
 385         } else {
 386                 switch (adapter->hw.mac.type) {
 387                 case ixgbe_mac_82598EB:
 388                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
 389                         break;
 390                 case ixgbe_mac_82599EB:
 391                 case ixgbe_mac_X540:
 392                         adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
 393                         break;
 394                 default:
 395                         break;
 396                 }
 397         }
 398
 399 #ifdef IXGBE_FCOE
 400         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
 401                 ixgbe_init_interrupt_scheme(adapter);
 402                 if (netif_running(netdev))
 403                         netdev->netdev_ops->ndo_open(netdev);
 404                 ret = DCB_HW_CHG_RST;
 405         }
 406 #endif
 407
 408         if (adapter->dcb_set_bitmap & BIT_PFC) {
 409                 u8 pfc_en;
 410                 ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
 411                 ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc_en);
 412                 ret = DCB_HW_CHG;
 413         }
 414
 415         if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
 416                 u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
 417                 u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
 418                 /* Priority to TC mapping in CEE case default to 1:1 */
 419                 u8 prio_tc[MAX_TRAFFIC_CLASS] = {0, 1, 2, 3, 4, 5, 6, 7};
 420                 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 421
 422 #ifdef CONFIG_FCOE
 423                 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
 424                         max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
 425 #endif
 426
 427                 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
 428                                                max_frame, DCB_TX_CONFIG);
 429                 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
 430                                                max_frame, DCB_RX_CONFIG);
 431
 432                 ixgbe_dcb_unpack_refill(&adapter->dcb_cfg,
 433                                         DCB_TX_CONFIG, refill);
 434                 ixgbe_dcb_unpack_max(&adapter->dcb_cfg, max);
 435                 ixgbe_dcb_unpack_bwgid(&adapter->dcb_cfg,
 436                                        DCB_TX_CONFIG, bwg_id);
 437                 ixgbe_dcb_unpack_prio(&adapter->dcb_cfg,
 438                                       DCB_TX_CONFIG, prio_type);
 439
 440                 ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
 441                                         bwg_id, prio_type, prio_tc);
 442         }
 443
 444         if (adapter->dcb_cfg.pfc_mode_enable)
 445                 adapter->hw.fc.current_mode = ixgbe_fc_pfc;
 446
 447         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG)
 448                 clear_bit(__IXGBE_RESETTING, &adapter->state);
 449         adapter->dcb_set_bitmap = 0x00;
 450         return ret;
 451 }
 452
 453 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
 454 {
 455         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 456
 457         switch (capid) {
 458         case DCB_CAP_ATTR_PG:
 459                 *cap = true;
 460                 break;
 461         case DCB_CAP_ATTR_PFC:
 462                 *cap = true;
 463                 break;
 464         case DCB_CAP_ATTR_UP2TC:
 465                 *cap = false;
 466                 break;
 467         case DCB_CAP_ATTR_PG_TCS:
 468                 *cap = 0x80;
 469                 break;
 470         case DCB_CAP_ATTR_PFC_TCS:
 471                 *cap = 0x80;
 472                 break;
 473         case DCB_CAP_ATTR_GSP:
 474                 *cap = true;
 475                 break;
 476         case DCB_CAP_ATTR_BCN:
 477                 *cap = false;
 478                 break;
 479         case DCB_CAP_ATTR_DCBX:
 480                 *cap = adapter->dcbx_cap;
 481                 break;
 482         default:
 483                 *cap = false;
 484                 break;
 485         }
 486
 487         return 0;
 488 }
 489
 490 static u8 ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
 491 {
 492         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 493         u8 rval = 0;
 494
 495         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 496                 switch (tcid) {
 497                 case DCB_NUMTCS_ATTR_PG:
 498                         *num = MAX_TRAFFIC_CLASS;
 499                         break;
 500                 case DCB_NUMTCS_ATTR_PFC:
 501                         *num = MAX_TRAFFIC_CLASS;
 502                         break;
 503                 default:
 504                         rval = -EINVAL;
 505                         break;
 506                 }
 507         } else {
 508                 rval = -EINVAL;
 509         }
 510
 511         return rval;
 512 }
 513
 514 static u8 ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
 515 {
 516         return -EINVAL;
 517 }
 518
 519 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
 520 {
 521         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 522
 523         return adapter->dcb_cfg.pfc_mode_enable;
 524 }
 525
 526 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
 527 {
 528         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 529
 530         adapter->temp_dcb_cfg.pfc_mode_enable = state;
 531         if (adapter->temp_dcb_cfg.pfc_mode_enable !=
 532                 adapter->dcb_cfg.pfc_mode_enable)
 533                 adapter->dcb_set_bitmap |= BIT_PFC;
 534 }
 535
 536 /**
 537  * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
 538  * @netdev : the corresponding netdev
 539  * @idtype : identifies the id as ether type or TCP/UDP port number
 540  * @id: id is either ether type or TCP/UDP port number
 541  *
 542  * Returns : on success, returns a non-zero 802.1p user priority bitmap
 543  * otherwise returns 0 as the invalid user priority bitmap to indicate an
 544  * error.
 545  */
 546 static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
 547 {
 548         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 549         struct dcb_app app = {
 550                                 .selector = idtype,
 551                                 .protocol = id,
 552                              };
 553
 554         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 555                 return 0;
 556
 557         return dcb_getapp(netdev, &app);
 558 }
 559
 560 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
 561                                    struct ieee_ets *ets)
 562 {
 563         struct ixgbe_adapter *adapter = netdev_priv(dev);
 564         struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
 565
 566         /* No IEEE PFC settings available */
 567         if (!my_ets)
 568                 return -EINVAL;
 569
 570         ets->ets_cap = MAX_TRAFFIC_CLASS;
 571         ets->cbs = my_ets->cbs;
 572         memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
 573         memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
 574         memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
 575         memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
 576         return 0;
 577 }
 578
 579 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
 580                                    struct ieee_ets *ets)
 581 {
 582         struct ixgbe_adapter *adapter = netdev_priv(dev);
 583         __u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
 584         __u8 prio_type[IEEE_8021QAZ_MAX_TCS];
 585         int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
 586         int i, err;
 587         __u64 *p = (__u64 *) ets->prio_tc;
 588         /* naively give each TC a bwg to map onto CEE hardware */
 589         __u8 bwg_id[IEEE_8021QAZ_MAX_TCS] = {0, 1, 2, 3, 4, 5, 6, 7};
 590
 591         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 592                 return -EINVAL;
 593
 594         if (!adapter->ixgbe_ieee_ets) {
 595                 adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
 596                                                   GFP_KERNEL);
 597                 if (!adapter->ixgbe_ieee_ets)
 598                         return -ENOMEM;
 599         }
 600
 601         memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
 602
 603         /* Map TSA onto CEE prio type */
 604         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
 605                 switch (ets->tc_tsa[i]) {
 606                 case IEEE_8021QAZ_TSA_STRICT:
 607                         prio_type[i] = 2;
 608                         break;
 609                 case IEEE_8021QAZ_TSA_ETS:
 610                         prio_type[i] = 0;
 611                         break;
 612                 default:
 613                         /* Hardware only supports priority strict or
 614                          * ETS transmission selection algorithms if
 615                          * we receive some other value from dcbnl
 616                          * throw an error
 617                          */
 618                         return -EINVAL;
 619                 }
 620         }
 621
 622         if (*p)
 623                 ixgbe_dcbnl_set_state(dev, 1);
 624         else
 625                 ixgbe_dcbnl_set_state(dev, 0);
 626
 627         ixgbe_ieee_credits(ets->tc_tx_bw, refill, max, max_frame);
 628         err = ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
 629                                       bwg_id, prio_type, ets->prio_tc);
 630         return err;
 631 }
 632
 633 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
 634                                    struct ieee_pfc *pfc)
 635 {
 636         struct ixgbe_adapter *adapter = netdev_priv(dev);
 637         struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
 638         int i;
 639
 640         /* No IEEE PFC settings available */
 641         if (!my_pfc)
 642                 return -EINVAL;
 643
 644         pfc->pfc_cap = MAX_TRAFFIC_CLASS;
 645         pfc->pfc_en = my_pfc->pfc_en;
 646         pfc->mbc = my_pfc->mbc;
 647         pfc->delay = my_pfc->delay;
 648
 649         for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
 650                 pfc->requests[i] = adapter->stats.pxoffrxc[i];
 651                 pfc->indications[i] = adapter->stats.pxofftxc[i];
 652         }
 653
 654         return 0;
 655 }
 656
 657 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
 658                                    struct ieee_pfc *pfc)
 659 {
 660         struct ixgbe_adapter *adapter = netdev_priv(dev);
 661         int err;
 662
 663         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 664                 return -EINVAL;
 665
 666         if (!adapter->ixgbe_ieee_pfc) {
 667                 adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
 668                                                   GFP_KERNEL);
 669                 if (!adapter->ixgbe_ieee_pfc)
 670                         return -ENOMEM;
 671         }
 672
 673         memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
 674         err = ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc->pfc_en);
 675         return err;
 676 }
 677
 678 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
 679                                    struct dcb_app *app)
 680 {
 681         struct ixgbe_adapter *adapter = netdev_priv(dev);
 682
 683         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 684                 return -EINVAL;
 685
 686         dcb_setapp(dev, app);
 687
 688 #ifdef IXGBE_FCOE
 689         if (app->selector == 1 && app->protocol == ETH_P_FCOE &&
 690             adapter->fcoe.tc == app->priority)
 691                 ixgbe_dcbnl_set_all(dev);
 692 #endif
 693         return 0;
 694 }
 695
 696 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
 697 {
 698         struct ixgbe_adapter *adapter = netdev_priv(dev);
 699         return adapter->dcbx_cap;
 700 }
 701
 702 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
 703 {
 704         struct ixgbe_adapter *adapter = netdev_priv(dev);
 705         struct ieee_ets ets = {0};
 706         struct ieee_pfc pfc = {0};
 707
 708         /* no support for LLD_MANAGED modes or CEE+IEEE */
 709         if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
 710             ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
 711             !(mode & DCB_CAP_DCBX_HOST))
 712                 return 1;
 713
 714         if (mode == adapter->dcbx_cap)
 715                 return 0;
 716
 717         adapter->dcbx_cap = mode;
 718
 719         /* ETS and PFC defaults */
 720         ets.ets_cap = 8;
 721         pfc.pfc_cap = 8;
 722
 723         if (mode & DCB_CAP_DCBX_VER_IEEE) {
 724                 ixgbe_dcbnl_ieee_setets(dev, &ets);
 725                 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
 726         } else if (mode & DCB_CAP_DCBX_VER_CEE) {
 727                 adapter->dcb_set_bitmap |= (BIT_PFC & BIT_PG_TX & BIT_PG_RX);
 728                 ixgbe_dcbnl_set_all(dev);
 729         } else {
 730                 /* Drop into single TC mode strict priority as this
 731                  * indicates CEE and IEEE versions are disabled
 732                  */
 733                 ixgbe_dcbnl_ieee_setets(dev, &ets);
 734                 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
 735                 ixgbe_dcbnl_set_state(dev, 0);
 736         }
 737
 738         return 0;
 739 }
 740
 741 const struct dcbnl_rtnl_ops dcbnl_ops = {
 742         .ieee_getets    = ixgbe_dcbnl_ieee_getets,
 743         .ieee_setets    = ixgbe_dcbnl_ieee_setets,
 744         .ieee_getpfc    = ixgbe_dcbnl_ieee_getpfc,
 745         .ieee_setpfc    = ixgbe_dcbnl_ieee_setpfc,
 746         .ieee_setapp    = ixgbe_dcbnl_ieee_setapp,
 747         .getstate       = ixgbe_dcbnl_get_state,
 748         .setstate       = ixgbe_dcbnl_set_state,
 749         .getpermhwaddr  = ixgbe_dcbnl_get_perm_hw_addr,
 750         .setpgtccfgtx   = ixgbe_dcbnl_set_pg_tc_cfg_tx,
 751         .setpgbwgcfgtx  = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
 752         .setpgtccfgrx   = ixgbe_dcbnl_set_pg_tc_cfg_rx,
 753         .setpgbwgcfgrx  = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
 754         .getpgtccfgtx   = ixgbe_dcbnl_get_pg_tc_cfg_tx,
 755         .getpgbwgcfgtx  = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
 756         .getpgtccfgrx   = ixgbe_dcbnl_get_pg_tc_cfg_rx,
 757         .getpgbwgcfgrx  = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
 758         .setpfccfg      = ixgbe_dcbnl_set_pfc_cfg,
 759         .getpfccfg      = ixgbe_dcbnl_get_pfc_cfg,
 760         .setall         = ixgbe_dcbnl_set_all,
 761         .getcap         = ixgbe_dcbnl_getcap,
 762         .getnumtcs      = ixgbe_dcbnl_getnumtcs,
 763         .setnumtcs      = ixgbe_dcbnl_setnumtcs,
 764         .getpfcstate    = ixgbe_dcbnl_getpfcstate,
 765         .setpfcstate    = ixgbe_dcbnl_setpfcstate,
 766         .getapp         = ixgbe_dcbnl_getapp,
 767         .getdcbx        = ixgbe_dcbnl_getdcbx,
 768         .setdcbx        = ixgbe_dcbnl_setdcbx,
 769 };