drivers/net/ixgbe/ixgbe_sriov.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   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 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 int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid, u32 vf)
 108 {
 109         return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
 110 }
 111
 112
 113 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_ROPE |
 118                   IXGBE_VMOLR_BAM);
 119         if (aupe)
 120                 vmolr |= IXGBE_VMOLR_AUPE;
 121         else
 122                 vmolr &= ~IXGBE_VMOLR_AUPE;
 123         IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
 124 }
 125
 126 static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, u32 vid, u32 vf)
 127 {
 128         struct ixgbe_hw *hw = &adapter->hw;
 129
 130         if (vid)
 131                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf),
 132                                 (vid | IXGBE_VMVIR_VLANA_DEFAULT));
 133         else
 134                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
 135 }
 136
 137 inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
 138 {
 139         struct ixgbe_hw *hw = &adapter->hw;
 140         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 141
 142         /* reset offloads to defaults */
 143         if (adapter->vfinfo[vf].pf_vlan) {
 144                 ixgbe_set_vf_vlan(adapter, true,
 145                                   adapter->vfinfo[vf].pf_vlan, vf);
 146                 ixgbe_set_vmvir(adapter,
 147                                 (adapter->vfinfo[vf].pf_vlan |
 148                                  (adapter->vfinfo[vf].pf_qos <<
 149                                   VLAN_PRIO_SHIFT)), vf);
 150                 ixgbe_set_vmolr(hw, vf, false);
 151         } else {
 152                 ixgbe_set_vmvir(adapter, 0, vf);
 153                 ixgbe_set_vmolr(hw, vf, true);
 154         }
 155
 156         /* reset multicast table array for vf */
 157         adapter->vfinfo[vf].num_vf_mc_hashes = 0;
 158
 159         /* Flush and reset the mta with the new values */
 160         ixgbe_set_rx_mode(adapter->netdev);
 161
 162         hw->mac.ops.clear_rar(hw, rar_entry);
 163 }
 164
 165 int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
 166                           int vf, unsigned char *mac_addr)
 167 {
 168         struct ixgbe_hw *hw = &adapter->hw;
 169         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 170
 171         memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
 172         hw->mac.ops.set_rar(hw, rar_entry, mac_addr, vf, IXGBE_RAH_AV);
 173
 174         return 0;
 175 }
 176
 177 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 178 {
 179         unsigned char vf_mac_addr[6];
 180         struct net_device *netdev = pci_get_drvdata(pdev);
 181         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 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 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         ixgbe_vf_reset_event(adapter, vf);
 219 }
 220
 221 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 222 {
 223         u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
 224         u32 msgbuf[mbx_size];
 225         struct ixgbe_hw *hw = &adapter->hw;
 226         s32 retval;
 227         int entries;
 228         u16 *hash_list;
 229         int add, vid;
 230
 231         retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 232
 233         if (retval)
 234                 pr_err("Error receiving message from VF\n");
 235
 236         /* this is a message we already processed, do nothing */
 237         if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
 238                 return retval;
 239
 240         /*
 241          * until the vf completes a virtual function reset it should not be
 242          * allowed to start any configuration.
 243          */
 244
 245         if (msgbuf[0] == IXGBE_VF_RESET) {
 246                 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
 247                 u8 *addr = (u8 *)(&msgbuf[1]);
 248                 e_info(probe, "VF Reset msg received from vf %d\n", vf);
 249                 adapter->vfinfo[vf].clear_to_send = false;
 250                 ixgbe_vf_reset_msg(adapter, vf);
 251                 adapter->vfinfo[vf].clear_to_send = true;
 252
 253                 /* reply to reset with ack and vf mac address */
 254                 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
 255                 memcpy(addr, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
 256                 /*
 257                  * Piggyback the multicast filter type so VF can compute the
 258                  * correct vectors
 259                  */
 260                 msgbuf[3] = hw->mac.mc_filter_type;
 261                 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
 262
 263                 return retval;
 264         }
 265
 266         if (!adapter->vfinfo[vf].clear_to_send) {
 267                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 268                 ixgbe_write_mbx(hw, msgbuf, 1, vf);
 269                 return retval;
 270         }
 271
 272         switch ((msgbuf[0] & 0xFFFF)) {
 273         case IXGBE_VF_SET_MAC_ADDR:
 274                 {
 275                         u8 *new_mac = ((u8 *)(&msgbuf[1]));
 276                         if (is_valid_ether_addr(new_mac) &&
 277                             !adapter->vfinfo[vf].pf_set_mac)
 278                                 ixgbe_set_vf_mac(adapter, vf, new_mac);
 279                         else
 280                                 ixgbe_set_vf_mac(adapter,
 281                                   vf, adapter->vfinfo[vf].vf_mac_addresses);
 282                 }
 283                 break;
 284         case IXGBE_VF_SET_MULTICAST:
 285                 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 286                           >> IXGBE_VT_MSGINFO_SHIFT;
 287                 hash_list = (u16 *)&msgbuf[1];
 288                 retval = ixgbe_set_vf_multicasts(adapter, entries,
 289                                                  hash_list, vf);
 290                 break;
 291         case IXGBE_VF_SET_LPE:
 292                 WARN_ON((msgbuf[0] & 0xFFFF) == IXGBE_VF_SET_LPE);
 293                 break;
 294         case IXGBE_VF_SET_VLAN:
 295                 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 296                       >> IXGBE_VT_MSGINFO_SHIFT;
 297                 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
 298                 retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
 299                 break;
 300         default:
 301                 e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
 302                 retval = IXGBE_ERR_MBX;
 303                 break;
 304         }
 305
 306         /* notify the VF of the results of what it sent us */
 307         if (retval)
 308                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 309         else
 310                 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
 311
 312         msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
 313
 314         ixgbe_write_mbx(hw, msgbuf, 1, vf);
 315
 316         return retval;
 317 }
 318
 319 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 320 {
 321         struct ixgbe_hw *hw = &adapter->hw;
 322         u32 msg = IXGBE_VT_MSGTYPE_NACK;
 323
 324         /* if device isn't clear to send it shouldn't be reading either */
 325         if (!adapter->vfinfo[vf].clear_to_send)
 326                 ixgbe_write_mbx(hw, &msg, 1, vf);
 327 }
 328
 329 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
 330 {
 331         struct ixgbe_hw *hw = &adapter->hw;
 332         u32 vf;
 333
 334         for (vf = 0; vf < adapter->num_vfs; vf++) {
 335                 /* process any reset requests */
 336                 if (!ixgbe_check_for_rst(hw, vf))
 337                         ixgbe_vf_reset_event(adapter, vf);
 338
 339                 /* process any messages pending */
 340                 if (!ixgbe_check_for_msg(hw, vf))
 341                         ixgbe_rcv_msg_from_vf(adapter, vf);
 342
 343                 /* process any acks */
 344                 if (!ixgbe_check_for_ack(hw, vf))
 345                         ixgbe_rcv_ack_from_vf(adapter, vf);
 346         }
 347 }
 348
 349 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
 350 {
 351         struct ixgbe_hw *hw = &adapter->hw;
 352
 353         /* disable transmit and receive for all vfs */
 354         IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
 355         IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
 356
 357         IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
 358         IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
 359 }
 360
 361 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
 362 {
 363         struct ixgbe_hw *hw = &adapter->hw;
 364         u32 ping;
 365         int i;
 366
 367         for (i = 0 ; i < adapter->num_vfs; i++) {
 368                 ping = IXGBE_PF_CONTROL_MSG;
 369                 if (adapter->vfinfo[i].clear_to_send)
 370                         ping |= IXGBE_VT_MSGTYPE_CTS;
 371                 ixgbe_write_mbx(hw, &ping, 1, i);
 372         }
 373 }
 374
 375 int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 376 {
 377         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 378         if (!is_valid_ether_addr(mac) || (vf >= adapter->num_vfs))
 379                 return -EINVAL;
 380         adapter->vfinfo[vf].pf_set_mac = true;
 381         dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
 382         dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
 383                                       " change effective.");
 384         if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 385                 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
 386                          " but the PF device is not up.\n");
 387                 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
 388                          " attempting to use the VF device.\n");
 389         }
 390         return ixgbe_set_vf_mac(adapter, vf, mac);
 391 }
 392
 393 int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 394 {
 395         int err = 0;
 396         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 397
 398         if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
 399                 return -EINVAL;
 400         if (vlan || qos) {
 401                 err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
 402                 if (err)
 403                         goto out;
 404                 ixgbe_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
 405                 ixgbe_set_vmolr(&adapter->hw, vf, false);
 406                 adapter->vfinfo[vf].pf_vlan = vlan;
 407                 adapter->vfinfo[vf].pf_qos = qos;
 408                 dev_info(&adapter->pdev->dev,
 409                          "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
 410                 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 411                         dev_warn(&adapter->pdev->dev,
 412                                  "The VF VLAN has been set,"
 413                                  " but the PF device is not up.\n");
 414                         dev_warn(&adapter->pdev->dev,
 415                                  "Bring the PF device up before"
 416                                  " attempting to use the VF device.\n");
 417                 }
 418         } else {
 419                 err = ixgbe_set_vf_vlan(adapter, false,
 420                                         adapter->vfinfo[vf].pf_vlan, vf);
 421                 ixgbe_set_vmvir(adapter, vlan, vf);
 422                 ixgbe_set_vmolr(&adapter->hw, vf, true);
 423                 adapter->vfinfo[vf].pf_vlan = 0;
 424                 adapter->vfinfo[vf].pf_qos = 0;
 425        }
 426 out:
 427        return err;
 428 }
 429
 430 int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
 431 {
 432         return -EOPNOTSUPP;
 433 }
 434
 435 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 436                             int vf, struct ifla_vf_info *ivi)
 437 {
 438         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 439         if (vf >= adapter->num_vfs)
 440                 return -EINVAL;
 441         ivi->vf = vf;
 442         memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
 443         ivi->tx_rate = 0;
 444         ivi->vlan = adapter->vfinfo[vf].pf_vlan;
 445         ivi->qos = adapter->vfinfo[vf].pf_qos;
 446         return 0;
 447 }