drivers/net/ixgbe/ixgbe_sriov.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2010 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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 #include <linux/types.h>
  29 #include <linux/module.h>
  30 #include <linux/pci.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/string.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/tcp.h>
  37 #include <linux/ipv6.h>
  38 #ifdef NETIF_F_HW_VLAN_TX
  39 #include <linux/if_vlan.h>
  40 #endif
  41
  42 #include "ixgbe.h"
  43
  44 #include "ixgbe_sriov.h"
  45
  46 static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
  47                                    int entries, u16 *hash_list, u32 vf)
  48 {
  49         struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
  50         struct ixgbe_hw *hw = &adapter->hw;
  51         int i;
  52         u32 vector_bit;
  53         u32 vector_reg;
  54         u32 mta_reg;
  55
  56         /* only so many hash values supported */
  57         entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES);
  58
  59         /*
  60          * salt away the number of multi cast addresses assigned
  61          * to this VF for later use to restore when the PF multi cast
  62          * list changes
  63          */
  64         vfinfo->num_vf_mc_hashes = entries;
  65
  66         /*
  67          * VFs are limited to using the MTA hash table for their multicast
  68          * addresses
  69          */
  70         for (i = 0; i < entries; i++) {
  71                 vfinfo->vf_mc_hashes[i] = hash_list[i];
  72         }
  73
  74         for (i = 0; i < vfinfo->num_vf_mc_hashes; i++) {
  75                 vector_reg = (vfinfo->vf_mc_hashes[i] >> 5) & 0x7F;
  76                 vector_bit = vfinfo->vf_mc_hashes[i] & 0x1F;
  77                 mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
  78                 mta_reg |= (1 << vector_bit);
  79                 IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
  80         }
  81
  82         return 0;
  83 }
  84
  85 void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter)
  86 {
  87         struct ixgbe_hw *hw = &adapter->hw;
  88         struct vf_data_storage *vfinfo;
  89         int i, j;
  90         u32 vector_bit;
  91         u32 vector_reg;
  92         u32 mta_reg;
  93
  94         for (i = 0; i < adapter->num_vfs; i++) {
  95                 vfinfo = &adapter->vfinfo[i];
  96                 for (j = 0; j < vfinfo->num_vf_mc_hashes; j++) {
  97                         hw->addr_ctrl.mta_in_use++;
  98                         vector_reg = (vfinfo->vf_mc_hashes[j] >> 5) & 0x7F;
  99                         vector_bit = vfinfo->vf_mc_hashes[j] & 0x1F;
 100                         mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
 101                         mta_reg |= (1 << vector_bit);
 102                         IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
 103                 }
 104         }
 105 }
 106
 107 static int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid,
 108                              u32 vf)
 109 {
 110         return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
 111 }
 112
 113 static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe)
 114 {
 115         u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
 116         vmolr |= (IXGBE_VMOLR_ROMPE |
 117                   IXGBE_VMOLR_BAM);
 118         if (aupe)
 119                 vmolr |= IXGBE_VMOLR_AUPE;
 120         else
 121                 vmolr &= ~IXGBE_VMOLR_AUPE;
 122         IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
 123 }
 124
 125 static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, u32 vid, u32 vf)
 126 {
 127         struct ixgbe_hw *hw = &adapter->hw;
 128
 129         if (vid)
 130                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf),
 131                                 (vid | IXGBE_VMVIR_VLANA_DEFAULT));
 132         else
 133                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
 134 }
 135
 136 static inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
 137 {
 138         struct ixgbe_hw *hw = &adapter->hw;
 139         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 140
 141         /* reset offloads to defaults */
 142         if (adapter->vfinfo[vf].pf_vlan) {
 143                 ixgbe_set_vf_vlan(adapter, true,
 144                                   adapter->vfinfo[vf].pf_vlan, vf);
 145                 ixgbe_set_vmvir(adapter,
 146                                 (adapter->vfinfo[vf].pf_vlan |
 147                                  (adapter->vfinfo[vf].pf_qos <<
 148                                   VLAN_PRIO_SHIFT)), vf);
 149                 ixgbe_set_vmolr(hw, vf, false);
 150         } else {
 151                 ixgbe_set_vmvir(adapter, 0, vf);
 152                 ixgbe_set_vmolr(hw, vf, true);
 153         }
 154
 155         /* reset multicast table array for vf */
 156         adapter->vfinfo[vf].num_vf_mc_hashes = 0;
 157
 158         /* Flush and reset the mta with the new values */
 159         ixgbe_set_rx_mode(adapter->netdev);
 160
 161         hw->mac.ops.clear_rar(hw, rar_entry);
 162 }
 163
 164 static int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
 165                             int vf, unsigned char *mac_addr)
 166 {
 167         struct ixgbe_hw *hw = &adapter->hw;
 168         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 169
 170         memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
 171         hw->mac.ops.set_rar(hw, rar_entry, mac_addr, vf, IXGBE_RAH_AV);
 172
 173         return 0;
 174 }
 175
 176 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 177 {
 178         unsigned char vf_mac_addr[6];
 179         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
 180         unsigned int vfn = (event_mask & 0x3f);
 181
 182         bool enable = ((event_mask & 0x10000000U) != 0);
 183
 184         if (enable) {
 185                 random_ether_addr(vf_mac_addr);
 186                 e_info(probe, "IOV: VF %d is enabled MAC %pM\n",
 187                        vfn, vf_mac_addr);
 188                 /*
 189                  * Store away the VF "permananet" MAC address, it will ask
 190                  * for it later.
 191                  */
 192                 memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
 193         }
 194
 195         return 0;
 196 }
 197
 198 static inline void ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
 199 {
 200         struct ixgbe_hw *hw = &adapter->hw;
 201         u32 reg;
 202         u32 reg_offset, vf_shift;
 203
 204         vf_shift = vf % 32;
 205         reg_offset = vf / 32;
 206
 207         /* enable transmit and receive for vf */
 208         reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
 209         reg |= (reg | (1 << vf_shift));
 210         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
 211
 212         reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
 213         reg |= (reg | (1 << vf_shift));
 214         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
 215
 216         /* Enable counting of spoofed packets in the SSVPC register */
 217         reg = IXGBE_READ_REG(hw, IXGBE_VMECM(reg_offset));
 218         reg |= (1 << vf_shift);
 219         IXGBE_WRITE_REG(hw, IXGBE_VMECM(reg_offset), reg);
 220
 221         ixgbe_vf_reset_event(adapter, vf);
 222 }
 223
 224 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 225 {
 226         u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
 227         u32 msgbuf[mbx_size];
 228         struct ixgbe_hw *hw = &adapter->hw;
 229         s32 retval;
 230         int entries;
 231         u16 *hash_list;
 232         int add, vid;
 233         u8 *new_mac;
 234
 235         retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 236
 237         if (retval)
 238                 pr_err("Error receiving message from VF\n");
 239
 240         /* this is a message we already processed, do nothing */
 241         if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
 242                 return retval;
 243
 244         /*
 245          * until the vf completes a virtual function reset it should not be
 246          * allowed to start any configuration.
 247          */
 248
 249         if (msgbuf[0] == IXGBE_VF_RESET) {
 250                 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
 251                 new_mac = (u8 *)(&msgbuf[1]);
 252                 e_info(probe, "VF Reset msg received from vf %d\n", vf);
 253                 adapter->vfinfo[vf].clear_to_send = false;
 254                 ixgbe_vf_reset_msg(adapter, vf);
 255                 adapter->vfinfo[vf].clear_to_send = true;
 256
 257                 if (is_valid_ether_addr(new_mac) &&
 258                     !adapter->vfinfo[vf].pf_set_mac)
 259                         ixgbe_set_vf_mac(adapter, vf, vf_mac);
 260                 else
 261                         ixgbe_set_vf_mac(adapter,
 262                                  vf, adapter->vfinfo[vf].vf_mac_addresses);
 263
 264                 /* reply to reset with ack and vf mac address */
 265                 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
 266                 memcpy(new_mac, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
 267                 /*
 268                  * Piggyback the multicast filter type so VF can compute the
 269                  * correct vectors
 270                  */
 271                 msgbuf[3] = hw->mac.mc_filter_type;
 272                 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
 273
 274                 return retval;
 275         }
 276
 277         if (!adapter->vfinfo[vf].clear_to_send) {
 278                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 279                 ixgbe_write_mbx(hw, msgbuf, 1, vf);
 280                 return retval;
 281         }
 282
 283         switch ((msgbuf[0] & 0xFFFF)) {
 284         case IXGBE_VF_SET_MAC_ADDR:
 285                 new_mac = ((u8 *)(&msgbuf[1]));
 286                 if (is_valid_ether_addr(new_mac) &&
 287                     !adapter->vfinfo[vf].pf_set_mac) {
 288                         ixgbe_set_vf_mac(adapter, vf, new_mac);
 289                 } else if (memcmp(adapter->vfinfo[vf].vf_mac_addresses,
 290                                   new_mac, ETH_ALEN)) {
 291                         e_warn(drv, "VF %d attempted to override "
 292                                "administratively set MAC address\nReload "
 293                                "the VF driver to resume operations\n", vf);
 294                         retval = -1;
 295                 }
 296                 break;
 297         case IXGBE_VF_SET_MULTICAST:
 298                 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 299                           >> IXGBE_VT_MSGINFO_SHIFT;
 300                 hash_list = (u16 *)&msgbuf[1];
 301                 retval = ixgbe_set_vf_multicasts(adapter, entries,
 302                                                  hash_list, vf);
 303                 break;
 304         case IXGBE_VF_SET_LPE:
 305                 WARN_ON((msgbuf[0] & 0xFFFF) == IXGBE_VF_SET_LPE);
 306                 break;
 307         case IXGBE_VF_SET_VLAN:
 308                 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 309                       >> IXGBE_VT_MSGINFO_SHIFT;
 310                 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
 311                 if (adapter->vfinfo[vf].pf_vlan) {
 312                         e_warn(drv, "VF %d attempted to override "
 313                                "administratively set VLAN configuration\n"
 314                                "Reload the VF driver to resume operations\n",
 315                                vf);
 316                         retval = -1;
 317                 } else {
 318                         retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
 319                 }
 320                 break;
 321         default:
 322                 e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
 323                 retval = IXGBE_ERR_MBX;
 324                 break;
 325         }
 326
 327         /* notify the VF of the results of what it sent us */
 328         if (retval)
 329                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 330         else
 331                 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
 332
 333         msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
 334
 335         ixgbe_write_mbx(hw, msgbuf, 1, vf);
 336
 337         return retval;
 338 }
 339
 340 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 341 {
 342         struct ixgbe_hw *hw = &adapter->hw;
 343         u32 msg = IXGBE_VT_MSGTYPE_NACK;
 344
 345         /* if device isn't clear to send it shouldn't be reading either */
 346         if (!adapter->vfinfo[vf].clear_to_send)
 347                 ixgbe_write_mbx(hw, &msg, 1, vf);
 348 }
 349
 350 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
 351 {
 352         struct ixgbe_hw *hw = &adapter->hw;
 353         u32 vf;
 354
 355         for (vf = 0; vf < adapter->num_vfs; vf++) {
 356                 /* process any reset requests */
 357                 if (!ixgbe_check_for_rst(hw, vf))
 358                         ixgbe_vf_reset_event(adapter, vf);
 359
 360                 /* process any messages pending */
 361                 if (!ixgbe_check_for_msg(hw, vf))
 362                         ixgbe_rcv_msg_from_vf(adapter, vf);
 363
 364                 /* process any acks */
 365                 if (!ixgbe_check_for_ack(hw, vf))
 366                         ixgbe_rcv_ack_from_vf(adapter, vf);
 367         }
 368 }
 369
 370 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
 371 {
 372         struct ixgbe_hw *hw = &adapter->hw;
 373
 374         /* disable transmit and receive for all vfs */
 375         IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
 376         IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
 377
 378         IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
 379         IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
 380 }
 381
 382 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
 383 {
 384         struct ixgbe_hw *hw = &adapter->hw;
 385         u32 ping;
 386         int i;
 387
 388         for (i = 0 ; i < adapter->num_vfs; i++) {
 389                 ping = IXGBE_PF_CONTROL_MSG;
 390                 if (adapter->vfinfo[i].clear_to_send)
 391                         ping |= IXGBE_VT_MSGTYPE_CTS;
 392                 ixgbe_write_mbx(hw, &ping, 1, i);
 393         }
 394 }
 395
 396 int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 397 {
 398         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 399         if (!is_valid_ether_addr(mac) || (vf >= adapter->num_vfs))
 400                 return -EINVAL;
 401         adapter->vfinfo[vf].pf_set_mac = true;
 402         dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
 403         dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
 404                                       " change effective.");
 405         if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 406                 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
 407                          " but the PF device is not up.\n");
 408                 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
 409                          " attempting to use the VF device.\n");
 410         }
 411         return ixgbe_set_vf_mac(adapter, vf, mac);
 412 }
 413
 414 int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 415 {
 416         int err = 0;
 417         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 418         struct ixgbe_hw *hw = &adapter->hw;
 419
 420         if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
 421                 return -EINVAL;
 422         if (vlan || qos) {
 423                 err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
 424                 if (err)
 425                         goto out;
 426                 ixgbe_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
 427                 ixgbe_set_vmolr(hw, vf, false);
 428                 hw->mac.ops.set_vlan_anti_spoofing(hw, true, vf);
 429                 adapter->vfinfo[vf].pf_vlan = vlan;
 430                 adapter->vfinfo[vf].pf_qos = qos;
 431                 dev_info(&adapter->pdev->dev,
 432                          "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
 433                 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 434                         dev_warn(&adapter->pdev->dev,
 435                                  "The VF VLAN has been set,"
 436                                  " but the PF device is not up.\n");
 437                         dev_warn(&adapter->pdev->dev,
 438                                  "Bring the PF device up before"
 439                                  " attempting to use the VF device.\n");
 440                 }
 441         } else {
 442                 err = ixgbe_set_vf_vlan(adapter, false,
 443                                         adapter->vfinfo[vf].pf_vlan, vf);
 444                 ixgbe_set_vmvir(adapter, vlan, vf);
 445                 ixgbe_set_vmolr(hw, vf, true);
 446                 hw->mac.ops.set_vlan_anti_spoofing(hw, false, vf);
 447                 adapter->vfinfo[vf].pf_vlan = 0;
 448                 adapter->vfinfo[vf].pf_qos = 0;
 449        }
 450 out:
 451        return err;
 452 }
 453
 454 int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
 455 {
 456         return -EOPNOTSUPP;
 457 }
 458
 459 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 460                             int vf, struct ifla_vf_info *ivi)
 461 {
 462         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 463         if (vf >= adapter->num_vfs)
 464                 return -EINVAL;
 465         ivi->vf = vf;
 466         memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
 467         ivi->tx_rate = 0;
 468         ivi->vlan = adapter->vfinfo[vf].pf_vlan;
 469         ivi->qos = adapter->vfinfo[vf].pf_qos;
 470         return 0;
 471 }