drivers/net/ixgbe/ixgbe_dcb_nl.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2009 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
  32 /* Callbacks for DCB netlink in the kernel */
  33 #define BIT_DCB_MODE    0x01
  34 #define BIT_PFC         0x02
  35 #define BIT_PG_RX       0x04
  36 #define BIT_PG_TX       0x08
  37 #define BIT_BCN         0x10
  38 #define BIT_LINKSPEED   0x80
  39
  40 int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
  41                        struct ixgbe_dcb_config *dst_dcb_cfg, int tc_max)
  42 {
  43         struct tc_configuration *src_tc_cfg = NULL;
  44         struct tc_configuration *dst_tc_cfg = NULL;
  45         int i;
  46
  47         if (!src_dcb_cfg || !dst_dcb_cfg)
  48                 return -EINVAL;
  49
  50         for (i = DCB_PG_ATTR_TC_0; i < tc_max + DCB_PG_ATTR_TC_0; i++) {
  51                 src_tc_cfg = &src_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
  52                 dst_tc_cfg = &dst_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
  53
  54                 dst_tc_cfg->path[DCB_TX_CONFIG].prio_type =
  55                                 src_tc_cfg->path[DCB_TX_CONFIG].prio_type;
  56
  57                 dst_tc_cfg->path[DCB_TX_CONFIG].bwg_id =
  58                                 src_tc_cfg->path[DCB_TX_CONFIG].bwg_id;
  59
  60                 dst_tc_cfg->path[DCB_TX_CONFIG].bwg_percent =
  61                                 src_tc_cfg->path[DCB_TX_CONFIG].bwg_percent;
  62
  63                 dst_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap =
  64                                 src_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap;
  65
  66                 dst_tc_cfg->path[DCB_RX_CONFIG].prio_type =
  67                                 src_tc_cfg->path[DCB_RX_CONFIG].prio_type;
  68
  69                 dst_tc_cfg->path[DCB_RX_CONFIG].bwg_id =
  70                                 src_tc_cfg->path[DCB_RX_CONFIG].bwg_id;
  71
  72                 dst_tc_cfg->path[DCB_RX_CONFIG].bwg_percent =
  73                                 src_tc_cfg->path[DCB_RX_CONFIG].bwg_percent;
  74
  75                 dst_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap =
  76                                 src_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap;
  77         }
  78
  79         for (i = DCB_PG_ATTR_BW_ID_0; i < DCB_PG_ATTR_BW_ID_MAX; i++) {
  80                 dst_dcb_cfg->bw_percentage[DCB_TX_CONFIG]
  81                         [i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
  82                                 [DCB_TX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
  83                 dst_dcb_cfg->bw_percentage[DCB_RX_CONFIG]
  84                         [i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
  85                                 [DCB_RX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
  86         }
  87
  88         for (i = DCB_PFC_UP_ATTR_0; i < DCB_PFC_UP_ATTR_MAX; i++) {
  89                 dst_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc =
  90                         src_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc;
  91         }
  92
  93         dst_dcb_cfg->pfc_mode_enable = src_dcb_cfg->pfc_mode_enable;
  94
  95         return 0;
  96 }
  97
  98 static u8 ixgbe_dcbnl_get_state(struct net_device *netdev)
  99 {
 100         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 101
 102         DPRINTK(DRV, INFO, "Get DCB Admin Mode.\n");
 103
 104         return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
 105 }
 106
 107 static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
 108 {
 109         u8 err = 0;
 110         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 111
 112         DPRINTK(DRV, INFO, "Set DCB Admin Mode.\n");
 113
 114         if (state > 0) {
 115                 /* Turn on DCB */
 116                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
 117                         goto out;
 118
 119                 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
 120                         DPRINTK(DRV, ERR, "Enable failed, needs MSI-X\n");
 121                         err = 1;
 122                         goto out;
 123                 }
 124
 125                 if (netif_running(netdev))
 126                         netdev->netdev_ops->ndo_stop(netdev);
 127                 ixgbe_reset_interrupt_capability(adapter);
 128                 ixgbe_napi_del_all(adapter);
 129                 INIT_LIST_HEAD(&netdev->napi_list);
 130                 kfree(adapter->tx_ring);
 131                 kfree(adapter->rx_ring);
 132                 adapter->tx_ring = NULL;
 133                 adapter->rx_ring = NULL;
 134
 135                 adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
 136                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
 137                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
 138                 ixgbe_init_interrupt_scheme(adapter);
 139                 if (netif_running(netdev))
 140                         netdev->netdev_ops->ndo_open(netdev);
 141         } else {
 142                 /* Turn off DCB */
 143                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 144                         adapter->hw.fc.requested_mode = ixgbe_fc_default;
 145                         if (netif_running(netdev))
 146                                 netdev->netdev_ops->ndo_stop(netdev);
 147                         ixgbe_reset_interrupt_capability(adapter);
 148                         ixgbe_napi_del_all(adapter);
 149                         INIT_LIST_HEAD(&netdev->napi_list);
 150                         kfree(adapter->tx_ring);
 151                         kfree(adapter->rx_ring);
 152                         adapter->tx_ring = NULL;
 153                         adapter->rx_ring = NULL;
 154
 155                         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
 156                         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
 157                         ixgbe_init_interrupt_scheme(adapter);
 158                         if (netif_running(netdev))
 159                                 netdev->netdev_ops->ndo_open(netdev);
 160                 }
 161         }
 162 out:
 163         return err;
 164 }
 165
 166 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
 167                                          u8 *perm_addr)
 168 {
 169         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 170         int i;
 171
 172         for (i = 0; i < netdev->addr_len; i++)
 173                 perm_addr[i] = adapter->hw.mac.perm_addr[i];
 174 }
 175
 176 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 177                                          u8 prio, u8 bwg_id, u8 bw_pct,
 178                                          u8 up_map)
 179 {
 180         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 181
 182         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 183                 adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
 184         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 185                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
 186         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 187                 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
 188                         bw_pct;
 189         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 190                 adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
 191                         up_map;
 192
 193         if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
 194              adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
 195             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
 196              adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
 197             (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
 198              adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
 199             (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
 200              adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
 201                 adapter->dcb_set_bitmap |= BIT_PG_TX;
 202 }
 203
 204 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 205                                           u8 bw_pct)
 206 {
 207         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 208
 209         adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
 210
 211         if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
 212             adapter->dcb_cfg.bw_percentage[0][bwg_id])
 213                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 214 }
 215
 216 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 217                                          u8 prio, u8 bwg_id, u8 bw_pct,
 218                                          u8 up_map)
 219 {
 220         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 221
 222         if (prio != DCB_ATTR_VALUE_UNDEFINED)
 223                 adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
 224         if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
 225                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
 226         if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
 227                 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
 228                         bw_pct;
 229         if (up_map != DCB_ATTR_VALUE_UNDEFINED)
 230                 adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
 231                         up_map;
 232
 233         if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
 234              adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
 235             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
 236              adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
 237             (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
 238              adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
 239             (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
 240              adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
 241                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 242 }
 243
 244 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 245                                           u8 bw_pct)
 246 {
 247         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 248
 249         adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
 250
 251         if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
 252             adapter->dcb_cfg.bw_percentage[1][bwg_id])
 253                 adapter->dcb_set_bitmap |= BIT_PG_RX;
 254 }
 255
 256 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 257                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 258                                          u8 *up_map)
 259 {
 260         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 261
 262         *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
 263         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
 264         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
 265         *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
 266 }
 267
 268 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
 269                                           u8 *bw_pct)
 270 {
 271         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 272
 273         *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
 274 }
 275
 276 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
 277                                          u8 *prio, u8 *bwg_id, u8 *bw_pct,
 278                                          u8 *up_map)
 279 {
 280         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 281
 282         *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
 283         *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
 284         *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
 285         *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
 286 }
 287
 288 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
 289                                           u8 *bw_pct)
 290 {
 291         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 292
 293         *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
 294 }
 295
 296 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
 297                                     u8 setting)
 298 {
 299         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 300
 301         adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
 302         if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
 303             adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
 304                 adapter->dcb_set_bitmap |= BIT_PFC;
 305                 adapter->temp_dcb_cfg.pfc_mode_enable = true;
 306         }
 307 }
 308
 309 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
 310                                     u8 *setting)
 311 {
 312         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 313
 314         *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
 315 }
 316
 317 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
 318 {
 319         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 320         int ret;
 321
 322         adapter->dcb_set_bitmap &= ~BIT_BCN;    /* no set for BCN */
 323         if (!adapter->dcb_set_bitmap)
 324                 return 1;
 325
 326         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
 327                 msleep(1);
 328
 329         if (netif_running(netdev))
 330                 ixgbe_down(adapter);
 331
 332         ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
 333                                  adapter->ring_feature[RING_F_DCB].indices);
 334         if (ret) {
 335                 clear_bit(__IXGBE_RESETTING, &adapter->state);
 336                 return ret;
 337         }
 338
 339         if (netif_running(netdev))
 340                 ixgbe_up(adapter);
 341
 342         adapter->dcb_set_bitmap = 0x00;
 343         clear_bit(__IXGBE_RESETTING, &adapter->state);
 344         return ret;
 345 }
 346
 347 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
 348 {
 349         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 350         u8 rval = 0;
 351
 352         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 353                 switch (capid) {
 354                 case DCB_CAP_ATTR_PG:
 355                         *cap = true;
 356                         break;
 357                 case DCB_CAP_ATTR_PFC:
 358                         *cap = true;
 359                         break;
 360                 case DCB_CAP_ATTR_UP2TC:
 361                         *cap = false;
 362                         break;
 363                 case DCB_CAP_ATTR_PG_TCS:
 364                         *cap = 0x80;
 365                         break;
 366                 case DCB_CAP_ATTR_PFC_TCS:
 367                         *cap = 0x80;
 368                         break;
 369                 case DCB_CAP_ATTR_GSP:
 370                         *cap = true;
 371                         break;
 372                 case DCB_CAP_ATTR_BCN:
 373                         *cap = false;
 374                         break;
 375                 default:
 376                         rval = -EINVAL;
 377                         break;
 378                 }
 379         } else {
 380                 rval = -EINVAL;
 381         }
 382
 383         return rval;
 384 }
 385
 386 static u8 ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
 387 {
 388         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 389         u8 rval = 0;
 390
 391         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 392                 switch (tcid) {
 393                 case DCB_NUMTCS_ATTR_PG:
 394                         *num = MAX_TRAFFIC_CLASS;
 395                         break;
 396                 case DCB_NUMTCS_ATTR_PFC:
 397                         *num = MAX_TRAFFIC_CLASS;
 398                         break;
 399                 default:
 400                         rval = -EINVAL;
 401                         break;
 402                 }
 403         } else {
 404                 rval = -EINVAL;
 405         }
 406
 407         return rval;
 408 }
 409
 410 static u8 ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
 411 {
 412         return -EINVAL;
 413 }
 414
 415 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
 416 {
 417         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 418
 419         return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
 420 }
 421
 422 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
 423 {
 424         return;
 425 }
 426
 427 struct dcbnl_rtnl_ops dcbnl_ops = {
 428         .getstate       = ixgbe_dcbnl_get_state,
 429         .setstate       = ixgbe_dcbnl_set_state,
 430         .getpermhwaddr  = ixgbe_dcbnl_get_perm_hw_addr,
 431         .setpgtccfgtx   = ixgbe_dcbnl_set_pg_tc_cfg_tx,
 432         .setpgbwgcfgtx  = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
 433         .setpgtccfgrx   = ixgbe_dcbnl_set_pg_tc_cfg_rx,
 434         .setpgbwgcfgrx  = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
 435         .getpgtccfgtx   = ixgbe_dcbnl_get_pg_tc_cfg_tx,
 436         .getpgbwgcfgtx  = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
 437         .getpgtccfgrx   = ixgbe_dcbnl_get_pg_tc_cfg_rx,
 438         .getpgbwgcfgrx  = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
 439         .setpfccfg      = ixgbe_dcbnl_set_pfc_cfg,
 440         .getpfccfg      = ixgbe_dcbnl_get_pfc_cfg,
 441         .setall         = ixgbe_dcbnl_set_all,
 442         .getcap         = ixgbe_dcbnl_getcap,
 443         .getnumtcs      = ixgbe_dcbnl_getnumtcs,
 444         .setnumtcs      = ixgbe_dcbnl_setnumtcs,
 445         .getpfcstate    = ixgbe_dcbnl_getpfcstate,
 446         .setpfcstate    = ixgbe_dcbnl_setpfcstate,
 447 };
 448