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
 114 static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe)
 115 {
 116         u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
 117         vmolr |= (IXGBE_VMOLR_ROMPE |
 118                   IXGBE_VMOLR_ROPE |
 119                   IXGBE_VMOLR_BAM);
 120         if (aupe)
 121                 vmolr |= IXGBE_VMOLR_AUPE;
 122         else
 123                 vmolr &= ~IXGBE_VMOLR_AUPE;
 124         IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
 125 }
 126
 127 static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, u32 vid, u32 vf)
 128 {
 129         struct ixgbe_hw *hw = &adapter->hw;
 130
 131         if (vid)
 132                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf),
 133                                 (vid | IXGBE_VMVIR_VLANA_DEFAULT));
 134         else
 135                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
 136 }
 137
 138 static inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
 139 {
 140         struct ixgbe_hw *hw = &adapter->hw;
 141         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 142
 143         /* reset offloads to defaults */
 144         if (adapter->vfinfo[vf].pf_vlan) {
 145                 ixgbe_set_vf_vlan(adapter, true,
 146                                   adapter->vfinfo[vf].pf_vlan, vf);
 147                 ixgbe_set_vmvir(adapter,
 148                                 (adapter->vfinfo[vf].pf_vlan |
 149                                  (adapter->vfinfo[vf].pf_qos <<
 150                                   VLAN_PRIO_SHIFT)), vf);
 151                 ixgbe_set_vmolr(hw, vf, false);
 152         } else {
 153                 ixgbe_set_vmvir(adapter, 0, vf);
 154                 ixgbe_set_vmolr(hw, vf, true);
 155         }
 156
 157         /* reset multicast table array for vf */
 158         adapter->vfinfo[vf].num_vf_mc_hashes = 0;
 159
 160         /* Flush and reset the mta with the new values */
 161         ixgbe_set_rx_mode(adapter->netdev);
 162
 163         hw->mac.ops.clear_rar(hw, rar_entry);
 164 }
 165
 166 static int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
 167                             int vf, unsigned char *mac_addr)
 168 {
 169         struct ixgbe_hw *hw = &adapter->hw;
 170         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 171
 172         memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
 173         hw->mac.ops.set_rar(hw, rar_entry, mac_addr, vf, IXGBE_RAH_AV);
 174
 175         return 0;
 176 }
 177
 178 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 179 {
 180         unsigned char vf_mac_addr[6];
 181         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
 182         unsigned int vfn = (event_mask & 0x3f);
 183
 184         bool enable = ((event_mask & 0x10000000U) != 0);
 185
 186         if (enable) {
 187                 random_ether_addr(vf_mac_addr);
 188                 e_info(probe, "IOV: VF %d is enabled MAC %pM\n",
 189                        vfn, vf_mac_addr);
 190                 /*
 191                  * Store away the VF "permananet" MAC address, it will ask
 192                  * for it later.
 193                  */
 194                 memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
 195         }
 196
 197         return 0;
 198 }
 199
 200 static inline void ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
 201 {
 202         struct ixgbe_hw *hw = &adapter->hw;
 203         u32 reg;
 204         u32 reg_offset, vf_shift;
 205
 206         vf_shift = vf % 32;
 207         reg_offset = vf / 32;
 208
 209         /* enable transmit and receive for vf */
 210         reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
 211         reg |= (reg | (1 << vf_shift));
 212         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
 213
 214         reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
 215         reg |= (reg | (1 << vf_shift));
 216         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
 217
 218         /* Enable counting of spoofed packets in the SSVPC register */
 219         reg = IXGBE_READ_REG(hw, IXGBE_VMECM(reg_offset));
 220         reg |= (1 << vf_shift);
 221         IXGBE_WRITE_REG(hw, IXGBE_VMECM(reg_offset), reg);
 222
 223         ixgbe_vf_reset_event(adapter, vf);
 224 }
 225
 226 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 227 {
 228         u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
 229         u32 msgbuf[mbx_size];
 230         struct ixgbe_hw *hw = &adapter->hw;
 231         s32 retval;
 232         int entries;
 233         u16 *hash_list;
 234         int add, vid;
 235         u8 *new_mac;
 236
 237         retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 238
 239         if (retval)
 240                 pr_err("Error receiving message from VF\n");
 241
 242         /* this is a message we already processed, do nothing */
 243         if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
 244                 return retval;
 245
 246         /*
 247          * until the vf completes a virtual function reset it should not be
 248          * allowed to start any configuration.
 249          */
 250
 251         if (msgbuf[0] == IXGBE_VF_RESET) {
 252                 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
 253                 new_mac = (u8 *)(&msgbuf[1]);
 254                 e_info(probe, "VF Reset msg received from vf %d\n", vf);
 255                 adapter->vfinfo[vf].clear_to_send = false;
 256                 ixgbe_vf_reset_msg(adapter, vf);
 257                 adapter->vfinfo[vf].clear_to_send = true;
 258
 259                 if (is_valid_ether_addr(new_mac) &&
 260                     !adapter->vfinfo[vf].pf_set_mac)
 261                         ixgbe_set_vf_mac(adapter, vf, vf_mac);
 262                 else
 263                         ixgbe_set_vf_mac(adapter,
 264                                  vf, adapter->vfinfo[vf].vf_mac_addresses);
 265
 266                 /* reply to reset with ack and vf mac address */
 267                 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
 268                 memcpy(new_mac, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
 269                 /*
 270                  * Piggyback the multicast filter type so VF can compute the
 271                  * correct vectors
 272                  */
 273                 msgbuf[3] = hw->mac.mc_filter_type;
 274                 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
 275
 276                 return retval;
 277         }
 278
 279         if (!adapter->vfinfo[vf].clear_to_send) {
 280                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 281                 ixgbe_write_mbx(hw, msgbuf, 1, vf);
 282                 return retval;
 283         }
 284
 285         switch ((msgbuf[0] & 0xFFFF)) {
 286         case IXGBE_VF_SET_MAC_ADDR:
 287                 new_mac = ((u8 *)(&msgbuf[1]));
 288                 if (is_valid_ether_addr(new_mac) &&
 289                     !adapter->vfinfo[vf].pf_set_mac) {
 290                         ixgbe_set_vf_mac(adapter, vf, new_mac);
 291                 } else if (memcmp(adapter->vfinfo[vf].vf_mac_addresses,
 292                                   new_mac, ETH_ALEN)) {
 293                         e_warn(drv, "VF %d attempted to override "
 294                                "administratively set MAC address\nReload "
 295                                "the VF driver to resume operations\n", vf);
 296                         retval = -1;
 297                 }
 298                 break;
 299         case IXGBE_VF_SET_MULTICAST:
 300                 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 301                           >> IXGBE_VT_MSGINFO_SHIFT;
 302                 hash_list = (u16 *)&msgbuf[1];
 303                 retval = ixgbe_set_vf_multicasts(adapter, entries,
 304                                                  hash_list, vf);
 305                 break;
 306         case IXGBE_VF_SET_LPE:
 307                 WARN_ON((msgbuf[0] & 0xFFFF) == IXGBE_VF_SET_LPE);
 308                 break;
 309         case IXGBE_VF_SET_VLAN:
 310                 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 311                       >> IXGBE_VT_MSGINFO_SHIFT;
 312                 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
 313                 if (adapter->vfinfo[vf].pf_vlan) {
 314                         e_warn(drv, "VF %d attempted to override "
 315                                "administratively set VLAN configuration\n"
 316                                "Reload the VF driver to resume operations\n",
 317                                vf);
 318                         retval = -1;
 319                 } else {
 320                         retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
 321                 }
 322                 break;
 323         default:
 324                 e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
 325                 retval = IXGBE_ERR_MBX;
 326                 break;
 327         }
 328
 329         /* notify the VF of the results of what it sent us */
 330         if (retval)
 331                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 332         else
 333                 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
 334
 335         msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
 336
 337         ixgbe_write_mbx(hw, msgbuf, 1, vf);
 338
 339         return retval;
 340 }
 341
 342 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 343 {
 344         struct ixgbe_hw *hw = &adapter->hw;
 345         u32 msg = IXGBE_VT_MSGTYPE_NACK;
 346
 347         /* if device isn't clear to send it shouldn't be reading either */
 348         if (!adapter->vfinfo[vf].clear_to_send)
 349                 ixgbe_write_mbx(hw, &msg, 1, vf);
 350 }
 351
 352 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
 353 {
 354         struct ixgbe_hw *hw = &adapter->hw;
 355         u32 vf;
 356
 357         for (vf = 0; vf < adapter->num_vfs; vf++) {
 358                 /* process any reset requests */
 359                 if (!ixgbe_check_for_rst(hw, vf))
 360                         ixgbe_vf_reset_event(adapter, vf);
 361
 362                 /* process any messages pending */
 363                 if (!ixgbe_check_for_msg(hw, vf))
 364                         ixgbe_rcv_msg_from_vf(adapter, vf);
 365
 366                 /* process any acks */
 367                 if (!ixgbe_check_for_ack(hw, vf))
 368                         ixgbe_rcv_ack_from_vf(adapter, vf);
 369         }
 370 }
 371
 372 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
 373 {
 374         struct ixgbe_hw *hw = &adapter->hw;
 375
 376         /* disable transmit and receive for all vfs */
 377         IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
 378         IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
 379
 380         IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
 381         IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
 382 }
 383
 384 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
 385 {
 386         struct ixgbe_hw *hw = &adapter->hw;
 387         u32 ping;
 388         int i;
 389
 390         for (i = 0 ; i < adapter->num_vfs; i++) {
 391                 ping = IXGBE_PF_CONTROL_MSG;
 392                 if (adapter->vfinfo[i].clear_to_send)
 393                         ping |= IXGBE_VT_MSGTYPE_CTS;
 394                 ixgbe_write_mbx(hw, &ping, 1, i);
 395         }
 396 }
 397
 398 int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 399 {
 400         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 401         if (!is_valid_ether_addr(mac) || (vf >= adapter->num_vfs))
 402                 return -EINVAL;
 403         adapter->vfinfo[vf].pf_set_mac = true;
 404         dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
 405         dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
 406                                       " change effective.");
 407         if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 408                 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
 409                          " but the PF device is not up.\n");
 410                 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
 411                          " attempting to use the VF device.\n");
 412         }
 413         return ixgbe_set_vf_mac(adapter, vf, mac);
 414 }
 415
 416 int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 417 {
 418         int err = 0;
 419         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 420         struct ixgbe_hw *hw = &adapter->hw;
 421
 422         if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
 423                 return -EINVAL;
 424         if (vlan || qos) {
 425                 err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
 426                 if (err)
 427                         goto out;
 428                 ixgbe_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
 429                 ixgbe_set_vmolr(hw, vf, false);
 430                 hw->mac.ops.set_vlan_anti_spoofing(hw, true, vf);
 431                 adapter->vfinfo[vf].pf_vlan = vlan;
 432                 adapter->vfinfo[vf].pf_qos = qos;
 433                 dev_info(&adapter->pdev->dev,
 434                          "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
 435                 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 436                         dev_warn(&adapter->pdev->dev,
 437                                  "The VF VLAN has been set,"
 438                                  " but the PF device is not up.\n");
 439                         dev_warn(&adapter->pdev->dev,
 440                                  "Bring the PF device up before"
 441                                  " attempting to use the VF device.\n");
 442                 }
 443         } else {
 444                 err = ixgbe_set_vf_vlan(adapter, false,
 445                                         adapter->vfinfo[vf].pf_vlan, vf);
 446                 ixgbe_set_vmvir(adapter, vlan, vf);
 447                 ixgbe_set_vmolr(hw, vf, true);
 448                 hw->mac.ops.set_vlan_anti_spoofing(hw, false, vf);
 449                 adapter->vfinfo[vf].pf_vlan = 0;
 450                 adapter->vfinfo[vf].pf_qos = 0;
 451        }
 452 out:
 453        return err;
 454 }
 455
 456 int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
 457 {
 458         return -EOPNOTSUPP;
 459 }
 460
 461 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 462                             int vf, struct ifla_vf_info *ivi)
 463 {
 464         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 465         if (vf >= adapter->num_vfs)
 466                 return -EINVAL;
 467         ivi->vf = vf;
 468         memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
 469         ivi->tx_rate = 0;
 470         ivi->vlan = adapter->vfinfo[vf].pf_vlan;
 471         ivi->qos = adapter->vfinfo[vf].pf_qos;
 472         return 0;
 473 }