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