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                 switch (adapter->hw.mac.type) {
 133                 case ixgbe_mac_82598EB:
 134                         adapter->last_lfc_mode = adapter->hw.fc.current_mode;
 135                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
 136                         break;
 137                 case ixgbe_mac_82599EB:
 138                 case ixgbe_mac_X540:
 139                         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
 140                         adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
 141                         break;
 142                 default:
 143                         break;
 144                 }
 145
 146                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
 147                 if (!netdev_get_num_tc(netdev))
 148                         ixgbe_setup_tc(netdev, MAX_TRAFFIC_CLASS);
 149
 150                 ixgbe_init_interrupt_scheme(adapter);
 151                 if (netif_running(netdev))
 152                         netdev->netdev_ops->ndo_open(netdev);
 153         } else {
 154                 /* Turn off DCB */
 155                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 156                         if (netif_running(netdev))
 157                                 netdev->netdev_ops->ndo_stop(netdev);
 158                         ixgbe_clear_interrupt_scheme(adapter);
 159
 160                         adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
 161                         adapter->temp_dcb_cfg.pfc_mode_enable = false;
 162                         adapter->dcb_cfg.pfc_mode_enable = false;
 163                         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
 164                         switch (adapter->hw.mac.type) {
 165                         case ixgbe_mac_82599EB:
 166                         case ixgbe_mac_X540:
 167                                 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
 168                                 break;
 169                         default:
 170                                 break;
 171                         }
 172
 173                         ixgbe_setup_tc(netdev, 0);
 174
 175                         ixgbe_init_interrupt_scheme(adapter);
 176                         if (netif_running(netdev))
 177                                 netdev->netdev_ops->ndo_open(netdev);
 178                 }
 179         }
 180 out:
 181         return err;
 182 }
 183
 184 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
 185                                          u8 *perm_addr)
 186 {
 187         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 188         int i, j;
 189
 190         memset(perm_addr, 0xff, MAX_ADDR_LEN);
 191
 192         for (i = 0; i < netdev->addr_len; i++)
 193                 perm_addr[i] = adapter->hw.mac.perm_addr[i];
 194
 195         switch (adapter->hw.mac.type) {
 196         case ixgbe_mac_82599EB:
 197         case ixgbe_mac_X540:
 198                 for (j = 0; j < netdev->addr_len; j++, i++)
 199                         perm_addr[i] = adapter->hw.mac.san_addr[j];
 200                 break;
 201         default:
 202                 break;
 203         }
 204 }
 205
 206 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 207                                          u8 prio, u8 bwg_id, u8 bw_pct,
 208                                          u8 up_map)
 209 {
 210         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 211
 212         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 213                 adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
 214         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 215                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
 216         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 217                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
 218                         bw_pct;
 219         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 220                 adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
 221                         up_map;
 222
 223         if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
 224              adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
 225             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
 226              adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
 227             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
 228              adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
 229             (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
 230              adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
 231                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 232 }
 233
 234 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 235                                           u8 bw_pct)
 236 {
 237         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 238
 239         adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
 240
 241         if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
 242             adapter->dcb_cfg.bw_percentage[0][bwg_id])
 243                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 244 }
 245
 246 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 247                                          u8 prio, u8 bwg_id, u8 bw_pct,
 248                                          u8 up_map)
 249 {
 250         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 251
 252         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 253                 adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
 254         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 255                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
 256         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 257                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
 258                         bw_pct;
 259         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 260                 adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
 261                         up_map;
 262
 263         if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
 264              adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
 265             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
 266              adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
 267             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
 268              adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
 269             (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
 270              adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
 271                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 272 }
 273
 274 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 275                                           u8 bw_pct)
 276 {
 277         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 278
 279         adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
 280
 281         if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
 282             adapter->dcb_cfg.bw_percentage[1][bwg_id])
 283                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 284 }
 285
 286 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 287                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 288                                          u8 *up_map)
 289 {
 290         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 291
 292         *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
 293         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
 294         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
 295         *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
 296 }
 297
 298 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 299                                           u8 *bw_pct)
 300 {
 301         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 302
 303         *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
 304 }
 305
 306 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 307                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 308                                          u8 *up_map)
 309 {
 310         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 311
 312         *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
 313         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
 314         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
 315         *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
 316 }
 317
 318 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 319                                           u8 *bw_pct)
 320 {
 321         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 322
 323         *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
 324 }
 325
 326 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
 327                                     u8 setting)
 328 {
 329         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 330
 331         adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
 332         if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
 333             adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
 334                 adapter->dcb_set_bitmap |= BIT_PFC;
 335                 adapter->temp_dcb_cfg.pfc_mode_enable = true;
 336         }
 337 }
 338
 339 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
 340                                     u8 *setting)
 341 {
 342         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 343
 344         *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
 345 }
 346
 347 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
 348 {
 349         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 350         int ret;
 351
 352         if (!adapter->dcb_set_bitmap ||
 353             !(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 354                 return DCB_NO_HW_CHG;
 355
 356         ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
 357                                  MAX_TRAFFIC_CLASS);
 358
 359         if (ret)
 360                 return DCB_NO_HW_CHG;
 361
 362         /*
 363          * Only take down the adapter if an app change occured. FCoE
 364          * may shuffle tx rings in this case and this can not be done
 365          * without a reset currently.
 366          */
 367         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
 368                 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
 369                         msleep(1);
 370
 371                 if (netif_running(netdev))
 372                         netdev->netdev_ops->ndo_stop(netdev);
 373                 ixgbe_clear_interrupt_scheme(adapter);
 374         }
 375
 376         if (adapter->dcb_cfg.pfc_mode_enable) {
 377                 switch (adapter->hw.mac.type) {
 378                 case ixgbe_mac_82599EB:
 379                 case ixgbe_mac_X540:
 380                         if (adapter->hw.fc.current_mode != ixgbe_fc_pfc)
 381                                 adapter->last_lfc_mode =
 382                                                   adapter->hw.fc.current_mode;
 383                         break;
 384                 default:
 385                         break;
 386                 }
 387                 adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
 388         } else {
 389                 switch (adapter->hw.mac.type) {
 390                 case ixgbe_mac_82598EB:
 391                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
 392                         break;
 393                 case ixgbe_mac_82599EB:
 394                 case ixgbe_mac_X540:
 395                         adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
 396                         break;
 397                 default:
 398                         break;
 399                 }
 400         }
 401
 402         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
 403                 ixgbe_init_interrupt_scheme(adapter);
 404                 if (netif_running(netdev))
 405                         netdev->netdev_ops->ndo_open(netdev);
 406                 ret = DCB_HW_CHG_RST;
 407         }
 408
 409         if (adapter->dcb_set_bitmap & BIT_PFC) {
 410                 u8 pfc_en;
 411                 ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
 412                 ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc_en);
 413                 ret = DCB_HW_CHG;
 414         }
 415
 416         if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
 417                 u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
 418                 u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
 419                 /* Priority to TC mapping in CEE case default to 1:1 */
 420                 u8 prio_tc[MAX_TRAFFIC_CLASS] = {0, 1, 2, 3, 4, 5, 6, 7};
 421                 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 422
 423 #ifdef CONFIG_FCOE
 424                 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
 425                         max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
 426 #endif
 427
 428                 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
 429                                                max_frame, DCB_TX_CONFIG);
 430                 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
 431                                                max_frame, DCB_RX_CONFIG);
 432
 433                 ixgbe_dcb_unpack_refill(&adapter->dcb_cfg,
 434                                         DCB_TX_CONFIG, refill);
 435                 ixgbe_dcb_unpack_max(&adapter->dcb_cfg, max);
 436                 ixgbe_dcb_unpack_bwgid(&adapter->dcb_cfg,
 437                                        DCB_TX_CONFIG, bwg_id);
 438                 ixgbe_dcb_unpack_prio(&adapter->dcb_cfg,
 439                                       DCB_TX_CONFIG, prio_type);
 440
 441                 ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
 442                                         bwg_id, prio_type, prio_tc);
 443         }
 444
 445         if (adapter->dcb_cfg.pfc_mode_enable)
 446                 adapter->hw.fc.current_mode = ixgbe_fc_pfc;
 447
 448         if (adapter->dcb_set_bitmap & BIT_APP_UPCHG)
 449                 clear_bit(__IXGBE_RESETTING, &adapter->state);
 450         adapter->dcb_set_bitmap = 0x00;
 451         return ret;
 452 }
 453
 454 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
 455 {
 456         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 457
 458         switch (capid) {
 459         case DCB_CAP_ATTR_PG:
 460                 *cap = true;
 461                 break;
 462         case DCB_CAP_ATTR_PFC:
 463                 *cap = true;
 464                 break;
 465         case DCB_CAP_ATTR_UP2TC:
 466                 *cap = false;
 467                 break;
 468         case DCB_CAP_ATTR_PG_TCS:
 469                 *cap = 0x80;
 470                 break;
 471         case DCB_CAP_ATTR_PFC_TCS:
 472                 *cap = 0x80;
 473                 break;
 474         case DCB_CAP_ATTR_GSP:
 475                 *cap = true;
 476                 break;
 477         case DCB_CAP_ATTR_BCN:
 478                 *cap = false;
 479                 break;
 480         case DCB_CAP_ATTR_DCBX:
 481                 *cap = adapter->dcbx_cap;
 482                 break;
 483         default:
 484                 *cap = false;
 485                 break;
 486         }
 487
 488         return 0;
 489 }
 490
 491 static u8 ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
 492 {
 493         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 494         u8 rval = 0;
 495
 496         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 497                 switch (tcid) {
 498                 case DCB_NUMTCS_ATTR_PG:
 499                         *num = MAX_TRAFFIC_CLASS;
 500                         break;
 501                 case DCB_NUMTCS_ATTR_PFC:
 502                         *num = MAX_TRAFFIC_CLASS;
 503                         break;
 504                 default:
 505                         rval = -EINVAL;
 506                         break;
 507                 }
 508         } else {
 509                 rval = -EINVAL;
 510         }
 511
 512         return rval;
 513 }
 514
 515 static u8 ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
 516 {
 517         return -EINVAL;
 518 }
 519
 520 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
 521 {
 522         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 523
 524         return adapter->dcb_cfg.pfc_mode_enable;
 525 }
 526
 527 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
 528 {
 529         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 530
 531         adapter->temp_dcb_cfg.pfc_mode_enable = state;
 532         if (adapter->temp_dcb_cfg.pfc_mode_enable !=
 533                 adapter->dcb_cfg.pfc_mode_enable)
 534                 adapter->dcb_set_bitmap |= BIT_PFC;
 535 }
 536
 537 /**
 538  * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
 539  * @netdev : the corresponding netdev
 540  * @idtype : identifies the id as ether type or TCP/UDP port number
 541  * @id: id is either ether type or TCP/UDP port number
 542  *
 543  * Returns : on success, returns a non-zero 802.1p user priority bitmap
 544  * otherwise returns 0 as the invalid user priority bitmap to indicate an
 545  * error.
 546  */
 547 static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
 548 {
 549         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 550         struct dcb_app app = {
 551                                 .selector = idtype,
 552                                 .protocol = id,
 553                              };
 554
 555         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 556                 return 0;
 557
 558         return dcb_getapp(netdev, &app);
 559 }
 560
 561 /**
 562  * ixgbe_dcbnl_setapp - set the DCBX application user priority
 563  * @netdev : the corresponding netdev
 564  * @idtype : identifies the id as ether type or TCP/UDP port number
 565  * @id: id is either ether type or TCP/UDP port number
 566  * @up: the 802.1p user priority bitmap
 567  *
 568  * Returns : 0 on success or 1 on error
 569  */
 570 static u8 ixgbe_dcbnl_setapp(struct net_device *netdev,
 571                              u8 idtype, u16 id, u8 up)
 572 {
 573         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 574         u8 rval = 1;
 575         struct dcb_app app = {
 576                               .selector = idtype,
 577                               .protocol = id,
 578                               .priority = up
 579                              };
 580
 581         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 582                 return rval;
 583
 584         rval = dcb_setapp(netdev, &app);
 585
 586         switch (idtype) {
 587         case DCB_APP_IDTYPE_ETHTYPE:
 588 #ifdef IXGBE_FCOE
 589                 if (id == ETH_P_FCOE) {
 590                         u8 old_tc;
 591
 592                         /* Get current programmed tc */
 593                         old_tc = adapter->fcoe.tc;
 594                         rval = ixgbe_fcoe_setapp(adapter, up);
 595
 596                         if (rval ||
 597                            !(adapter->flags & IXGBE_FLAG_DCB_ENABLED) ||
 598                            !(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
 599                                 break;
 600
 601                         /* The FCoE application priority may be changed multiple
 602                          * times in quick sucession with switches that build up
 603                          * TLVs. To avoid creating uneeded device resets this
 604                          * checks the actual HW configuration and clears
 605                          * BIT_APP_UPCHG if a HW configuration change is not
 606                          * need
 607                          */
 608                         if (old_tc == adapter->fcoe.tc)
 609                                 adapter->dcb_set_bitmap &= ~BIT_APP_UPCHG;
 610                         else
 611                                 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
 612                 }
 613 #endif
 614                 break;
 615         case DCB_APP_IDTYPE_PORTNUM:
 616                 break;
 617         default:
 618                 break;
 619         }
 620         return rval;
 621 }
 622
 623 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
 624                                    struct ieee_ets *ets)
 625 {
 626         struct ixgbe_adapter *adapter = netdev_priv(dev);
 627         struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
 628
 629         /* No IEEE PFC settings available */
 630         if (!my_ets)
 631                 return -EINVAL;
 632
 633         ets->ets_cap = MAX_TRAFFIC_CLASS;
 634         ets->cbs = my_ets->cbs;
 635         memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
 636         memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
 637         memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
 638         memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
 639         return 0;
 640 }
 641
 642 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
 643                                    struct ieee_ets *ets)
 644 {
 645         struct ixgbe_adapter *adapter = netdev_priv(dev);
 646         __u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
 647         __u8 prio_type[IEEE_8021QAZ_MAX_TCS];
 648         int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
 649         int i, err;
 650         __u64 *p = (__u64 *) ets->prio_tc;
 651         /* naively give each TC a bwg to map onto CEE hardware */
 652         __u8 bwg_id[IEEE_8021QAZ_MAX_TCS] = {0, 1, 2, 3, 4, 5, 6, 7};
 653
 654         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 655                 return -EINVAL;
 656
 657         if (!adapter->ixgbe_ieee_ets) {
 658                 adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
 659                                                   GFP_KERNEL);
 660                 if (!adapter->ixgbe_ieee_ets)
 661                         return -ENOMEM;
 662         }
 663
 664         memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
 665
 666         /* Map TSA onto CEE prio type */
 667         for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
 668                 switch (ets->tc_tsa[i]) {
 669                 case IEEE_8021QAZ_TSA_STRICT:
 670                         prio_type[i] = 2;
 671                         break;
 672                 case IEEE_8021QAZ_TSA_ETS:
 673                         prio_type[i] = 0;
 674                         break;
 675                 default:
 676                         /* Hardware only supports priority strict or
 677                          * ETS transmission selection algorithms if
 678                          * we receive some other value from dcbnl
 679                          * throw an error
 680                          */
 681                         return -EINVAL;
 682                 }
 683         }
 684
 685         if (*p)
 686                 ixgbe_dcbnl_set_state(dev, 1);
 687         else
 688                 ixgbe_dcbnl_set_state(dev, 0);
 689
 690         ixgbe_ieee_credits(ets->tc_tx_bw, refill, max, max_frame);
 691         err = ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
 692                                       bwg_id, prio_type, ets->prio_tc);
 693         return err;
 694 }
 695
 696 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
 697                                    struct ieee_pfc *pfc)
 698 {
 699         struct ixgbe_adapter *adapter = netdev_priv(dev);
 700         struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
 701         int i;
 702
 703         /* No IEEE PFC settings available */
 704         if (!my_pfc)
 705                 return -EINVAL;
 706
 707         pfc->pfc_cap = MAX_TRAFFIC_CLASS;
 708         pfc->pfc_en = my_pfc->pfc_en;
 709         pfc->mbc = my_pfc->mbc;
 710         pfc->delay = my_pfc->delay;
 711
 712         for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
 713                 pfc->requests[i] = adapter->stats.pxoffrxc[i];
 714                 pfc->indications[i] = adapter->stats.pxofftxc[i];
 715         }
 716
 717         return 0;
 718 }
 719
 720 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
 721                                    struct ieee_pfc *pfc)
 722 {
 723         struct ixgbe_adapter *adapter = netdev_priv(dev);
 724         int err;
 725
 726         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 727                 return -EINVAL;
 728
 729         if (!adapter->ixgbe_ieee_pfc) {
 730                 adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
 731                                                   GFP_KERNEL);
 732                 if (!adapter->ixgbe_ieee_pfc)
 733                         return -ENOMEM;
 734         }
 735
 736         memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
 737         err = ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc->pfc_en);
 738         return err;
 739 }
 740
 741 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
 742                                    struct dcb_app *app)
 743 {
 744         struct ixgbe_adapter *adapter = netdev_priv(dev);
 745
 746         if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 747                 return -EINVAL;
 748 #ifdef IXGBE_FCOE
 749         if (app->selector == 1 && app->protocol == ETH_P_FCOE) {
 750                 if (adapter->fcoe.tc == app->priority)
 751                         goto setapp;
 752
 753                 /* In IEEE mode map up to tc 1:1 */
 754                 adapter->fcoe.tc = app->priority;
 755                 adapter->fcoe.up = app->priority;
 756
 757                 /* Force hardware reset required to push FCoE
 758                  * setup on {tx|rx}_rings
 759                  */
 760                 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
 761                 ixgbe_dcbnl_set_all(dev);
 762         }
 763
 764 setapp:
 765 #endif
 766         dcb_setapp(dev, app);
 767         return 0;
 768 }
 769
 770 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
 771 {
 772         struct ixgbe_adapter *adapter = netdev_priv(dev);
 773         return adapter->dcbx_cap;
 774 }
 775
 776 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
 777 {
 778         struct ixgbe_adapter *adapter = netdev_priv(dev);
 779         struct ieee_ets ets = {0};
 780         struct ieee_pfc pfc = {0};
 781
 782         /* no support for LLD_MANAGED modes or CEE+IEEE */
 783         if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
 784             ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
 785             !(mode & DCB_CAP_DCBX_HOST))
 786                 return 1;
 787
 788         if (mode == adapter->dcbx_cap)
 789                 return 0;
 790
 791         adapter->dcbx_cap = mode;
 792
 793         /* ETS and PFC defaults */
 794         ets.ets_cap = 8;
 795         pfc.pfc_cap = 8;
 796
 797         if (mode & DCB_CAP_DCBX_VER_IEEE) {
 798                 ixgbe_dcbnl_ieee_setets(dev, &ets);
 799                 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
 800         } else if (mode & DCB_CAP_DCBX_VER_CEE) {
 801                 adapter->dcb_set_bitmap |= (BIT_PFC & BIT_PG_TX & BIT_PG_RX);
 802                 ixgbe_dcbnl_set_all(dev);
 803         } else {
 804                 /* Drop into single TC mode strict priority as this
 805                  * indicates CEE and IEEE versions are disabled
 806                  */
 807                 ixgbe_dcbnl_ieee_setets(dev, &ets);
 808                 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
 809                 ixgbe_dcbnl_set_state(dev, 0);
 810         }
 811
 812         return 0;
 813 }
 814
 815 const struct dcbnl_rtnl_ops dcbnl_ops = {
 816         .ieee_getets    = ixgbe_dcbnl_ieee_getets,
 817         .ieee_setets    = ixgbe_dcbnl_ieee_setets,
 818         .ieee_getpfc    = ixgbe_dcbnl_ieee_getpfc,
 819         .ieee_setpfc    = ixgbe_dcbnl_ieee_setpfc,
 820         .ieee_setapp    = ixgbe_dcbnl_ieee_setapp,
 821         .getstate       = ixgbe_dcbnl_get_state,
 822         .setstate       = ixgbe_dcbnl_set_state,
 823         .getpermhwaddr  = ixgbe_dcbnl_get_perm_hw_addr,
 824         .setpgtccfgtx   = ixgbe_dcbnl_set_pg_tc_cfg_tx,
 825         .setpgbwgcfgtx  = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
 826         .setpgtccfgrx   = ixgbe_dcbnl_set_pg_tc_cfg_rx,
 827         .setpgbwgcfgrx  = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
 828         .getpgtccfgtx   = ixgbe_dcbnl_get_pg_tc_cfg_tx,
 829         .getpgbwgcfgtx  = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
 830         .getpgtccfgrx   = ixgbe_dcbnl_get_pg_tc_cfg_rx,
 831         .getpgbwgcfgrx  = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
 832         .setpfccfg      = ixgbe_dcbnl_set_pfc_cfg,
 833         .getpfccfg      = ixgbe_dcbnl_get_pfc_cfg,
 834         .setall         = ixgbe_dcbnl_set_all,
 835         .getcap         = ixgbe_dcbnl_getcap,
 836         .getnumtcs      = ixgbe_dcbnl_getnumtcs,
 837         .setnumtcs      = ixgbe_dcbnl_setnumtcs,
 838         .getpfcstate    = ixgbe_dcbnl_getpfcstate,
 839         .setpfcstate    = ixgbe_dcbnl_setpfcstate,
 840         .getapp         = ixgbe_dcbnl_getapp,
 841         .setapp         = ixgbe_dcbnl_setapp,
 842         .getdcbx        = ixgbe_dcbnl_getdcbx,
 843         .setdcbx        = ixgbe_dcbnl_setdcbx,
 844 };