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                 if (netif_running(netdev))
 129                         netdev->netdev_ops->ndo_stop(netdev);
 130                 ixgbe_clear_interrupt_scheme(adapter);
 131
 132                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
 133                 switch (adapter->hw.mac.type) {
 134                 case ixgbe_mac_82598EB:
 135                         adapter->last_lfc_mode = adapter->hw.fc.current_mode;
 136                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
 137                         break;
 138                 case ixgbe_mac_82599EB:
 139                 case ixgbe_mac_X540:
 140                         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
 141                         adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
 142                         break;
 143                 default:
 144                         break;
 145                 }
 146
 147                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
 148                 ixgbe_init_interrupt_scheme(adapter);
 149                 if (netif_running(netdev))
 150                         netdev->netdev_ops->ndo_open(netdev);
 151         } else {
 152                 /* Turn off DCB */
 153                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 154                         if (netif_running(netdev))
 155                                 netdev->netdev_ops->ndo_stop(netdev);
 156                         ixgbe_clear_interrupt_scheme(adapter);
 157
 158                         adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
 159                         adapter->temp_dcb_cfg.pfc_mode_enable = false;
 160                         adapter->dcb_cfg.pfc_mode_enable = false;
 161                         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
 162                         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
 163                         switch (adapter->hw.mac.type) {
 164                         case ixgbe_mac_82599EB:
 165                         case ixgbe_mac_X540:
 166                                 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
 167                                 break;
 168                         default:
 169                                 break;
 170                         }
 171
 172                         ixgbe_init_interrupt_scheme(adapter);
 173                         if (netif_running(netdev))
 174                                 netdev->netdev_ops->ndo_open(netdev);
 175                 }
 176         }
 177 out:
 178         return err;
 179 }
 180
 181 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
 182                                          u8 *perm_addr)
 183 {
 184         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 185         int i, j;
 186
 187         memset(perm_addr, 0xff, MAX_ADDR_LEN);
 188
 189         for (i = 0; i < netdev->addr_len; i++)
 190                 perm_addr[i] = adapter->hw.mac.perm_addr[i];
 191
 192         switch (adapter->hw.mac.type) {
 193         case ixgbe_mac_82599EB:
 194         case ixgbe_mac_X540:
 195                 for (j = 0; j < netdev->addr_len; j++, i++)
 196                         perm_addr[i] = adapter->hw.mac.san_addr[j];
 197                 break;
 198         default:
 199                 break;
 200         }
 201 }
 202
 203 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 204                                          u8 prio, u8 bwg_id, u8 bw_pct,
 205                                          u8 up_map)
 206 {
 207         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 208
 209         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 210                 adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
 211         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 212                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
 213         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 214                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
 215                         bw_pct;
 216         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 217                 adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
 218                         up_map;
 219
 220         if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
 221              adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
 222             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
 223              adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
 224             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
 225              adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
 226             (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
 227              adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
 228                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 229 }
 230
 231 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 232                                           u8 bw_pct)
 233 {
 234         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 235
 236         adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
 237
 238         if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
 239             adapter->dcb_cfg.bw_percentage[0][bwg_id])
 240                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 241 }
 242
 243 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 244                                          u8 prio, u8 bwg_id, u8 bw_pct,
 245                                          u8 up_map)
 246 {
 247         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 248
 249         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 250                 adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
 251         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 252                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
 253         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 254                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
 255                         bw_pct;
 256         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 257                 adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
 258                         up_map;
 259
 260         if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
 261              adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
 262             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
 263              adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
 264             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
 265              adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
 266             (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
 267              adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
 268                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 269 }
 270
 271 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 272                                           u8 bw_pct)
 273 {
 274         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 275
 276         adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
 277
 278         if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
 279             adapter->dcb_cfg.bw_percentage[1][bwg_id])
 280                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 281 }
 282
 283 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 284                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 285                                          u8 *up_map)
 286 {
 287         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 288
 289         *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
 290         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
 291         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
 292         *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
 293 }
 294
 295 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 296                                           u8 *bw_pct)
 297 {
 298         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 299
 300         *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
 301 }
 302
 303 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 304                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 305                                          u8 *up_map)
 306 {
 307         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 308
 309         *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
 310         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
 311         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
 312         *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
 313 }
 314
 315 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 316                                           u8 *bw_pct)
 317 {
 318         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 319
 320         *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
 321 }
 322
 323 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
 324                                     u8 setting)
 325 {
 326         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 327
 328         adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
 329         if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
 330             adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
 331                 adapter->dcb_set_bitmap |= BIT_PFC;
 332                 adapter->temp_dcb_cfg.pfc_mode_enable = true;
 333         }
 334 }
 335
 336 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
 337                                     u8 *setting)
 338 {
 339         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 340
 341         *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
 342 }
 343
 344 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
 345 {
 346         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 347         int ret;
 348
 349         if (!adapter->dcb_set_bitmap ||
 350             !(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 351                 return DCB_NO_HW_CHG;
 352
 353         ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
 354                                  adapter->ring_feature[RING_F_DCB].indices);
 355
 356         if (ret)
 357                 return DCB_NO_HW_CHG;
 358
 359         /*
 360          * Only take down the adapter if an app change occured. FCoE
 361          * may shuffle tx rings in this case and this can not be done
 362          * without a reset currently.
 363          */
 364         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
 365                 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
 366                         msleep(1);
 367
 368                 if (netif_running(netdev))
 369                         netdev->netdev_ops->ndo_stop(netdev);
 370                 ixgbe_clear_interrupt_scheme(adapter);
 371         }
 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         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
 406         if (adapter->dcb_set_bitmap & BIT_PFC) {
 407                 u8 pfc_en;
 408                 ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
 409                 ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc_en);
 410                 ret = DCB_HW_CHG;
 411         }
 412
 413         if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
 414                 u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
 415                 u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
 416                 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 417
 418 #ifdef CONFIG_FCOE
 419                 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
 420                         max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
 421 #endif
 422
 423                 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
 424                                                max_frame, DCB_TX_CONFIG);
 425                 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
 426                                                max_frame, DCB_RX_CONFIG);
 427
 428                 ixgbe_dcb_unpack_refill(&adapter->dcb_cfg,
 429                                         DCB_TX_CONFIG, refill);
 430                 ixgbe_dcb_unpack_max(&adapter->dcb_cfg, max);
 431                 ixgbe_dcb_unpack_bwgid(&adapter->dcb_cfg,
 432                                        DCB_TX_CONFIG, bwg_id);
 433                 ixgbe_dcb_unpack_prio(&adapter->dcb_cfg,
 434                                       DCB_TX_CONFIG, prio_type);
 435
 436                 ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
 437                                         bwg_id, prio_type);
 438         }
 439
 440         if (adapter->dcb_cfg.pfc_mode_enable)
 441                 adapter->hw.fc.current_mode = ixgbe_fc_pfc;
 442
 443         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG)
 444                 clear_bit(__IXGBE_RESETTING, &adapter->state);
 445         adapter->dcb_set_bitmap = 0x00;
 446         return ret;
 447 }
 448
 449 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
 450 {
 451         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 452
 453         switch (capid) {
 454         case DCB_CAP_ATTR_PG:
 455                 *cap = true;
 456                 break;
 457         case DCB_CAP_ATTR_PFC:
 458                 *cap = true;
 459                 break;
 460         case DCB_CAP_ATTR_UP2TC:
 461                 *cap = false;
 462                 break;
 463         case DCB_CAP_ATTR_PG_TCS:
 464                 *cap = 0x80;
 465                 break;
 466         case DCB_CAP_ATTR_PFC_TCS:
 467                 *cap = 0x80;
 468                 break;
 469         case DCB_CAP_ATTR_GSP:
 470                 *cap = true;
 471                 break;
 472         case DCB_CAP_ATTR_BCN:
 473                 *cap = false;
 474                 break;
 475         case DCB_CAP_ATTR_DCBX:
 476                 *cap = adapter->dcbx_cap;
 477                 break;
 478         default:
 479                 *cap = false;
 480                 break;
 481         }
 482
 483         return 0;
 484 }
 485
 486 static u8 ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
 487 {
 488         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 489         u8 rval = 0;
 490
 491         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 492                 switch (tcid) {
 493                 case DCB_NUMTCS_ATTR_PG:
 494                         *num = MAX_TRAFFIC_CLASS;
 495                         break;
 496                 case DCB_NUMTCS_ATTR_PFC:
 497                         *num = MAX_TRAFFIC_CLASS;
 498                         break;
 499                 default:
 500                         rval = -EINVAL;
 501                         break;
 502                 }
 503         } else {
 504                 rval = -EINVAL;
 505         }
 506
 507         return rval;
 508 }
 509
 510 static u8 ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
 511 {
 512         return -EINVAL;
 513 }
 514
 515 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
 516 {
 517         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 518
 519         return adapter->dcb_cfg.pfc_mode_enable;
 520 }
 521
 522 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
 523 {
 524         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 525
 526         adapter->temp_dcb_cfg.pfc_mode_enable = state;
 527         if (adapter->temp_dcb_cfg.pfc_mode_enable !=
 528                 adapter->dcb_cfg.pfc_mode_enable)
 529                 adapter->dcb_set_bitmap |= BIT_PFC;
 530 }
 531
 532 /**
 533  * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
 534  * @netdev : the corresponding netdev
 535  * @idtype : identifies the id as ether type or TCP/UDP port number
 536  * @id: id is either ether type or TCP/UDP port number
 537  *
 538  * Returns : on success, returns a non-zero 802.1p user priority bitmap
 539  * otherwise returns 0 as the invalid user priority bitmap to indicate an
 540  * error.
 541  */
 542 static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
 543 {
 544         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 545         struct dcb_app app = {
 546                                 .selector = idtype,
 547                                 .protocol = id,
 548                              };
 549
 550         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 551                 return 0;
 552
 553         return dcb_getapp(netdev, &app);
 554 }
 555
 556 /**
 557  * ixgbe_dcbnl_setapp - set the DCBX application user priority
 558  * @netdev : the corresponding netdev
 559  * @idtype : identifies the id as ether type or TCP/UDP port number
 560  * @id: id is either ether type or TCP/UDP port number
 561  * @up: the 802.1p user priority bitmap
 562  *
 563  * Returns : 0 on success or 1 on error
 564  */
 565 static u8 ixgbe_dcbnl_setapp(struct net_device *netdev,
 566                              u8 idtype, u16 id, u8 up)
 567 {
 568         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 569         u8 rval = 1;
 570         struct dcb_app app = {
 571                               .selector = idtype,
 572                               .protocol = id,
 573                               .priority = up
 574                              };
 575
 576         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 577                 return rval;
 578
 579         rval = dcb_setapp(netdev, &app);
 580
 581         switch (idtype) {
 582         case DCB_APP_IDTYPE_ETHTYPE:
 583 #ifdef IXGBE_FCOE
 584                 if (id == ETH_P_FCOE) {
 585                         u8 old_tc;
 586
 587                         /* Get current programmed tc */
 588                         old_tc = adapter->fcoe.tc;
 589                         rval = ixgbe_fcoe_setapp(adapter, up);
 590
 591                         if (rval ||
 592                            !(adapter->flags & IXGBE_FLAG_DCB_ENABLED) ||
 593                            !(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
 594                                 break;
 595
 596                         /* The FCoE application priority may be changed multiple
 597                          * times in quick sucession with switches that build up
 598                          * TLVs. To avoid creating uneeded device resets this
 599                          * checks the actual HW configuration and clears
 600                          * BIT_APP_UPCHG if a HW configuration change is not
 601                          * need
 602                          */
 603                         if (old_tc == adapter->fcoe.tc)
 604                                 adapter->dcb_set_bitmap &= ~BIT_APP_UPCHG;
 605                         else
 606                                 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
 607                 }
 608 #endif
 609                 break;
 610         case DCB_APP_IDTYPE_PORTNUM:
 611                 break;
 612         default:
 613                 break;
 614         }
 615         return rval;
 616 }
 617
 618 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
 619                                    struct ieee_ets *ets)
 620 {
 621         struct ixgbe_adapter *adapter = netdev_priv(dev);
 622         struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
 623
 624         /* No IEEE PFC settings available */
 625         if (!my_ets)
 626                 return -EINVAL;
 627
 628         ets->ets_cap = MAX_TRAFFIC_CLASS;
 629         ets->cbs = my_ets->cbs;
 630         memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
 631         memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
 632         memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
 633         memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
 634         return 0;
 635 }
 636
 637 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
 638                                    struct ieee_ets *ets)
 639 {
 640         struct ixgbe_adapter *adapter = netdev_priv(dev);
 641         __u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
 642         int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
 643         int err;
 644         /* naively give each TC a bwg to map onto CEE hardware */
 645         __u8 bwg_id[IEEE_8021QAZ_MAX_TCS] = {0, 1, 2, 3, 4, 5, 6, 7};
 646
 647         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 648                 return -EINVAL;
 649
 650         if (!adapter->ixgbe_ieee_ets) {
 651                 adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
 652                                                   GFP_KERNEL);
 653                 if (!adapter->ixgbe_ieee_ets)
 654                         return -ENOMEM;
 655         }
 656
 657         memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
 658
 659         ixgbe_ieee_credits(ets->tc_tx_bw, refill, max, max_frame);
 660         err = ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
 661                                       bwg_id, ets->tc_tsa);
 662         return err;
 663 }
 664
 665 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
 666                                    struct ieee_pfc *pfc)
 667 {
 668         struct ixgbe_adapter *adapter = netdev_priv(dev);
 669         struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
 670         int i;
 671
 672         /* No IEEE PFC settings available */
 673         if (!my_pfc)
 674                 return -EINVAL;
 675
 676         pfc->pfc_cap = MAX_TRAFFIC_CLASS;
 677         pfc->pfc_en = my_pfc->pfc_en;
 678         pfc->mbc = my_pfc->mbc;
 679         pfc->delay = my_pfc->delay;
 680
 681         for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
 682                 pfc->requests[i] = adapter->stats.pxoffrxc[i];
 683                 pfc->indications[i] = adapter->stats.pxofftxc[i];
 684         }
 685
 686         return 0;
 687 }
 688
 689 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
 690                                    struct ieee_pfc *pfc)
 691 {
 692         struct ixgbe_adapter *adapter = netdev_priv(dev);
 693         int err;
 694
 695         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 696                 return -EINVAL;
 697
 698         if (!adapter->ixgbe_ieee_pfc) {
 699                 adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
 700                                                   GFP_KERNEL);
 701                 if (!adapter->ixgbe_ieee_pfc)
 702                         return -ENOMEM;
 703         }
 704
 705         memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
 706         err = ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc->pfc_en);
 707         return err;
 708 }
 709
 710 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
 711                                    struct dcb_app *app)
 712 {
 713         struct ixgbe_adapter *adapter = netdev_priv(dev);
 714
 715         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 716                 return -EINVAL;
 717 #ifdef IXGBE_FCOE
 718         if (app->selector == 1 && app->protocol == ETH_P_FCOE) {
 719                 if (adapter->fcoe.tc == app->priority)
 720                         goto setapp;
 721
 722                 /* In IEEE mode map up to tc 1:1 */
 723                 adapter->fcoe.tc = app->priority;
 724                 adapter->fcoe.up = app->priority;
 725
 726                 /* Force hardware reset required to push FCoE
 727                  * setup on {tx|rx}_rings
 728                  */
 729                 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
 730                 ixgbe_dcbnl_set_all(dev);
 731         }
 732
 733 setapp:
 734 #endif
 735         dcb_setapp(dev, app);
 736         return 0;
 737 }
 738
 739 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
 740 {
 741         struct ixgbe_adapter *adapter = netdev_priv(dev);
 742         return adapter->dcbx_cap;
 743 }
 744
 745 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
 746 {
 747         struct ixgbe_adapter *adapter = netdev_priv(dev);
 748         struct ieee_ets ets = {0};
 749         struct ieee_pfc pfc = {0};
 750
 751         /* no support for LLD_MANAGED modes or CEE+IEEE */
 752         if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
 753             ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
 754             !(mode & DCB_CAP_DCBX_HOST))
 755                 return 1;
 756
 757         if (mode == adapter->dcbx_cap)
 758                 return 0;
 759
 760         adapter->dcbx_cap = mode;
 761
 762         /* ETS and PFC defaults */
 763         ets.ets_cap = 8;
 764         pfc.pfc_cap = 8;
 765
 766         if (mode & DCB_CAP_DCBX_VER_IEEE) {
 767                 ixgbe_dcbnl_ieee_setets(dev, &ets);
 768                 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
 769         } else if (mode & DCB_CAP_DCBX_VER_CEE) {
 770                 adapter->dcb_set_bitmap |= (BIT_PFC & BIT_PG_TX & BIT_PG_RX);
 771                 ixgbe_dcbnl_set_all(dev);
 772         } else {
 773                 /* Drop into single TC mode strict priority as this
 774                  * indicates CEE and IEEE versions are disabled
 775                  */
 776                 ixgbe_dcbnl_ieee_setets(dev, &ets);
 777                 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
 778                 ixgbe_dcbnl_set_state(dev, 0);
 779         }
 780
 781         return 0;
 782 }
 783
 784 const struct dcbnl_rtnl_ops dcbnl_ops = {
 785         .ieee_getets    = ixgbe_dcbnl_ieee_getets,
 786         .ieee_setets    = ixgbe_dcbnl_ieee_setets,
 787         .ieee_getpfc    = ixgbe_dcbnl_ieee_getpfc,
 788         .ieee_setpfc    = ixgbe_dcbnl_ieee_setpfc,
 789         .ieee_setapp    = ixgbe_dcbnl_ieee_setapp,
 790         .getstate       = ixgbe_dcbnl_get_state,
 791         .setstate       = ixgbe_dcbnl_set_state,
 792         .getpermhwaddr  = ixgbe_dcbnl_get_perm_hw_addr,
 793         .setpgtccfgtx   = ixgbe_dcbnl_set_pg_tc_cfg_tx,
 794         .setpgbwgcfgtx  = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
 795         .setpgtccfgrx   = ixgbe_dcbnl_set_pg_tc_cfg_rx,
 796         .setpgbwgcfgrx  = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
 797         .getpgtccfgtx   = ixgbe_dcbnl_get_pg_tc_cfg_tx,
 798         .getpgbwgcfgtx  = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
 799         .getpgtccfgrx   = ixgbe_dcbnl_get_pg_tc_cfg_rx,
 800         .getpgbwgcfgrx  = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
 801         .setpfccfg      = ixgbe_dcbnl_set_pfc_cfg,
 802         .getpfccfg      = ixgbe_dcbnl_get_pfc_cfg,
 803         .setall         = ixgbe_dcbnl_set_all,
 804         .getcap         = ixgbe_dcbnl_getcap,
 805         .getnumtcs      = ixgbe_dcbnl_getnumtcs,
 806         .setnumtcs      = ixgbe_dcbnl_setnumtcs,
 807         .getpfcstate    = ixgbe_dcbnl_getpfcstate,
 808         .setpfcstate    = ixgbe_dcbnl_setpfcstate,
 809         .getapp         = ixgbe_dcbnl_getapp,
 810         .setapp         = ixgbe_dcbnl_setapp,
 811         .getdcbx        = ixgbe_dcbnl_getdcbx,
 812         .setdcbx        = ixgbe_dcbnl_setdcbx,
 813 };