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