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
  29 #include <linux/types.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/string.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/ipv6.h>
  39 #ifdef NETIF_F_HW_VLAN_TX
  40 #include <linux/if_vlan.h>
  41 #endif
  42
  43 #include "ixgbe.h"
  44
  45 #include "ixgbe_sriov.h"
  46
  47 int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
  48                             int entries, u16 *hash_list, u32 vf)
  49 {
  50         struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
  51         int i;
  52
  53         /* only so many hash values supported */
  54         entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES);
  55
  56         /*
  57          * salt away the number of multi cast addresses assigned
  58          * to this VF for later use to restore when the PF multi cast
  59          * list changes
  60          */
  61         vfinfo->num_vf_mc_hashes = entries;
  62
  63         /*
  64          * VFs are limited to using the MTA hash table for their multicast
  65          * addresses
  66          */
  67         for (i = 0; i < entries; i++) {
  68                 vfinfo->vf_mc_hashes[i] = hash_list[i];;
  69         }
  70
  71         /* Flush and reset the mta with the new values */
  72         ixgbe_set_rx_mode(adapter->netdev);
  73
  74         return 0;
  75 }
  76
  77 void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter)
  78 {
  79         struct ixgbe_hw *hw = &adapter->hw;
  80         struct vf_data_storage *vfinfo;
  81         int i, j;
  82         u32 vector_bit;
  83         u32 vector_reg;
  84         u32 mta_reg;
  85
  86         for (i = 0; i < adapter->num_vfs; i++) {
  87                 vfinfo = &adapter->vfinfo[i];
  88                 for (j = 0; j < vfinfo->num_vf_mc_hashes; j++) {
  89                         hw->addr_ctrl.mta_in_use++;
  90                         vector_reg = (vfinfo->vf_mc_hashes[j] >> 5) & 0x7F;
  91                         vector_bit = vfinfo->vf_mc_hashes[j] & 0x1F;
  92                         mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
  93                         mta_reg |= (1 << vector_bit);
  94                         IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
  95                 }
  96         }
  97 }
  98
  99 int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid, u32 vf)
 100 {
 101         u32 ctrl;
 102
 103         /* Check if global VLAN already set, if not set it */
 104         ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
 105         if (!(ctrl & IXGBE_VLNCTRL_VFE)) {
 106                 /* enable VLAN tag insert/strip */
 107                 ctrl |= IXGBE_VLNCTRL_VFE;
 108                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
 109                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
 110         }
 111
 112         return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
 113 }
 114
 115
 116 void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe)
 117 {
 118         u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
 119         vmolr |= (IXGBE_VMOLR_ROMPE |
 120                   IXGBE_VMOLR_ROPE |
 121                   IXGBE_VMOLR_BAM);
 122         if (aupe)
 123                 vmolr |= IXGBE_VMOLR_AUPE;
 124         else
 125                 vmolr &= ~IXGBE_VMOLR_AUPE;
 126         IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
 127 }
 128
 129 static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, u32 vid, u32 vf)
 130 {
 131         struct ixgbe_hw *hw = &adapter->hw;
 132
 133         if (vid)
 134                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf),
 135                                 (vid | IXGBE_VMVIR_VLANA_DEFAULT));
 136         else
 137                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
 138 }
 139
 140 inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
 141 {
 142         struct ixgbe_hw *hw = &adapter->hw;
 143
 144         /* reset offloads to defaults */
 145         if (adapter->vfinfo[vf].pf_vlan) {
 146                 ixgbe_set_vf_vlan(adapter, true,
 147                                   adapter->vfinfo[vf].pf_vlan, vf);
 148                 ixgbe_set_vmvir(adapter,
 149                                 (adapter->vfinfo[vf].pf_vlan |
 150                                  (adapter->vfinfo[vf].pf_qos <<
 151                                   VLAN_PRIO_SHIFT)), vf);
 152                 ixgbe_set_vmolr(hw, vf, false);
 153         } else {
 154                 ixgbe_set_vmvir(adapter, 0, vf);
 155                 ixgbe_set_vmolr(hw, vf, true);
 156         }
 157
 158         /* reset multicast table array for vf */
 159         adapter->vfinfo[vf].num_vf_mc_hashes = 0;
 160
 161         /* Flush and reset the mta with the new values */
 162         ixgbe_set_rx_mode(adapter->netdev);
 163
 164         if (adapter->vfinfo[vf].rar > 0) {
 165                 adapter->hw.mac.ops.clear_rar(&adapter->hw,
 166                                               adapter->vfinfo[vf].rar);
 167                 adapter->vfinfo[vf].rar = -1;
 168         }
 169 }
 170
 171 int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
 172                           int vf, unsigned char *mac_addr)
 173 {
 174         struct ixgbe_hw *hw = &adapter->hw;
 175
 176         adapter->vfinfo[vf].rar = hw->mac.ops.set_rar(hw, vf + 1, mac_addr,
 177                                                       vf, IXGBE_RAH_AV);
 178         if (adapter->vfinfo[vf].rar < 0) {
 179                 DPRINTK(DRV, ERR, "Could not set MAC Filter for VF %d\n", vf);
 180                 return -1;
 181         }
 182
 183         memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
 184
 185         return 0;
 186 }
 187
 188 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 189 {
 190         unsigned char vf_mac_addr[6];
 191         struct net_device *netdev = pci_get_drvdata(pdev);
 192         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 193         unsigned int vfn = (event_mask & 0x3f);
 194
 195         bool enable = ((event_mask & 0x10000000U) != 0);
 196
 197         if (enable) {
 198                 random_ether_addr(vf_mac_addr);
 199                 DPRINTK(PROBE, INFO, "IOV: VF %d is enabled "
 200                        "mac %02X:%02X:%02X:%02X:%02X:%02X\n",
 201                        vfn,
 202                        vf_mac_addr[0], vf_mac_addr[1], vf_mac_addr[2],
 203                        vf_mac_addr[3], vf_mac_addr[4], vf_mac_addr[5]);
 204                 /*
 205                  * Store away the VF "permananet" MAC address, it will ask
 206                  * for it later.
 207                  */
 208                 memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
 209         }
 210
 211         return 0;
 212 }
 213
 214 inline void ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
 215 {
 216         struct ixgbe_hw *hw = &adapter->hw;
 217         u32 reg;
 218         u32 reg_offset, vf_shift;
 219
 220         vf_shift = vf % 32;
 221         reg_offset = vf / 32;
 222
 223         /* enable transmit and receive for vf */
 224         reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
 225         reg |= (reg | (1 << vf_shift));
 226         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
 227
 228         reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
 229         reg |= (reg | (1 << vf_shift));
 230         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
 231
 232         ixgbe_vf_reset_event(adapter, vf);
 233 }
 234
 235 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 236 {
 237         u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
 238         u32 msgbuf[mbx_size];
 239         struct ixgbe_hw *hw = &adapter->hw;
 240         s32 retval;
 241         int entries;
 242         u16 *hash_list;
 243         int add, vid;
 244
 245         retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 246
 247         if (retval)
 248                 printk(KERN_ERR "Error receiving message from VF\n");
 249
 250         /* this is a message we already processed, do nothing */
 251         if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
 252                 return retval;
 253
 254         /*
 255          * until the vf completes a virtual function reset it should not be
 256          * allowed to start any configuration.
 257          */
 258
 259         if (msgbuf[0] == IXGBE_VF_RESET) {
 260                 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
 261                 u8 *addr = (u8 *)(&msgbuf[1]);
 262                 DPRINTK(PROBE, INFO, "VF Reset msg received from vf %d\n", vf);
 263                 adapter->vfinfo[vf].clear_to_send = false;
 264                 ixgbe_vf_reset_msg(adapter, vf);
 265                 adapter->vfinfo[vf].clear_to_send = true;
 266
 267                 /* reply to reset with ack and vf mac address */
 268                 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
 269                 memcpy(addr, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
 270                 /*
 271                  * Piggyback the multicast filter type so VF can compute the
 272                  * correct vectors
 273                  */
 274                 msgbuf[3] = hw->mac.mc_filter_type;
 275                 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
 276
 277                 return retval;
 278         }
 279
 280         if (!adapter->vfinfo[vf].clear_to_send) {
 281                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 282                 ixgbe_write_mbx(hw, msgbuf, 1, vf);
 283                 return retval;
 284         }
 285
 286         switch ((msgbuf[0] & 0xFFFF)) {
 287         case IXGBE_VF_SET_MAC_ADDR:
 288                 {
 289                         u8 *new_mac = ((u8 *)(&msgbuf[1]));
 290                         if (is_valid_ether_addr(new_mac) &&
 291                             !adapter->vfinfo[vf].pf_set_mac)
 292                                 ixgbe_set_vf_mac(adapter, vf, new_mac);
 293                         else
 294                                 ixgbe_set_vf_mac(adapter,
 295                                   vf, adapter->vfinfo[vf].vf_mac_addresses);
 296                 }
 297                 break;
 298         case IXGBE_VF_SET_MULTICAST:
 299                 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 300                           >> IXGBE_VT_MSGINFO_SHIFT;
 301                 hash_list = (u16 *)&msgbuf[1];
 302                 retval = ixgbe_set_vf_multicasts(adapter, entries,
 303                                                  hash_list, vf);
 304                 break;
 305         case IXGBE_VF_SET_LPE:
 306                 WARN_ON((msgbuf[0] & 0xFFFF) == IXGBE_VF_SET_LPE);
 307                 break;
 308         case IXGBE_VF_SET_VLAN:
 309                 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 310                       >> IXGBE_VT_MSGINFO_SHIFT;
 311                 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
 312                 retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
 313                 break;
 314         default:
 315                 DPRINTK(DRV, ERR, "Unhandled Msg %8.8x\n", msgbuf[0]);
 316                 retval = IXGBE_ERR_MBX;
 317                 break;
 318         }
 319
 320         /* notify the VF of the results of what it sent us */
 321         if (retval)
 322                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 323         else
 324                 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
 325
 326         msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
 327
 328         ixgbe_write_mbx(hw, msgbuf, 1, vf);
 329
 330         return retval;
 331 }
 332
 333 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 334 {
 335         struct ixgbe_hw *hw = &adapter->hw;
 336         u32 msg = IXGBE_VT_MSGTYPE_NACK;
 337
 338         /* if device isn't clear to send it shouldn't be reading either */
 339         if (!adapter->vfinfo[vf].clear_to_send)
 340                 ixgbe_write_mbx(hw, &msg, 1, vf);
 341 }
 342
 343 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
 344 {
 345         struct ixgbe_hw *hw = &adapter->hw;
 346         u32 vf;
 347
 348         for (vf = 0; vf < adapter->num_vfs; vf++) {
 349                 /* process any reset requests */
 350                 if (!ixgbe_check_for_rst(hw, vf))
 351                         ixgbe_vf_reset_event(adapter, vf);
 352
 353                 /* process any messages pending */
 354                 if (!ixgbe_check_for_msg(hw, vf))
 355                         ixgbe_rcv_msg_from_vf(adapter, vf);
 356
 357                 /* process any acks */
 358                 if (!ixgbe_check_for_ack(hw, vf))
 359                         ixgbe_rcv_ack_from_vf(adapter, vf);
 360         }
 361 }
 362
 363 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
 364 {
 365         struct ixgbe_hw *hw = &adapter->hw;
 366
 367         /* disable transmit and receive for all vfs */
 368         IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
 369         IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
 370
 371         IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
 372         IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
 373 }
 374
 375 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
 376 {
 377         struct ixgbe_hw *hw = &adapter->hw;
 378         u32 ping;
 379         int i;
 380
 381         for (i = 0 ; i < adapter->num_vfs; i++) {
 382                 ping = IXGBE_PF_CONTROL_MSG;
 383                 if (adapter->vfinfo[i].clear_to_send)
 384                         ping |= IXGBE_VT_MSGTYPE_CTS;
 385                 ixgbe_write_mbx(hw, &ping, 1, i);
 386         }
 387 }
 388
 389 int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 390 {
 391         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 392         if (!is_valid_ether_addr(mac) || (vf >= adapter->num_vfs))
 393                 return -EINVAL;
 394         adapter->vfinfo[vf].pf_set_mac = true;
 395         dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
 396         dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
 397                                       " change effective.");
 398         if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 399                 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
 400                          " but the PF device is not up.\n");
 401                 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
 402                          " attempting to use the VF device.\n");
 403         }
 404         return ixgbe_set_vf_mac(adapter, vf, mac);
 405 }
 406
 407 int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 408 {
 409         int err = 0;
 410         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 411
 412         if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
 413                 return -EINVAL;
 414         if (vlan || qos) {
 415                 err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
 416                 if (err)
 417                         goto out;
 418                 ixgbe_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
 419                 ixgbe_set_vmolr(&adapter->hw, vf, false);
 420                 adapter->vfinfo[vf].pf_vlan = vlan;
 421                 adapter->vfinfo[vf].pf_qos = qos;
 422                 dev_info(&adapter->pdev->dev,
 423                          "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
 424                 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 425                         dev_warn(&adapter->pdev->dev,
 426                                  "The VF VLAN has been set,"
 427                                  " but the PF device is not up.\n");
 428                         dev_warn(&adapter->pdev->dev,
 429                                  "Bring the PF device up before"
 430                                  " attempting to use the VF device.\n");
 431                 }
 432         } else {
 433                 err = ixgbe_set_vf_vlan(adapter, false,
 434                                         adapter->vfinfo[vf].pf_vlan, vf);
 435                 ixgbe_set_vmvir(adapter, vlan, vf);
 436                 ixgbe_set_vmolr(&adapter->hw, vf, true);
 437                 adapter->vfinfo[vf].pf_vlan = 0;
 438                 adapter->vfinfo[vf].pf_qos = 0;
 439        }
 440 out:
 441        return err;
 442 }
 443
 444 int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
 445 {
 446         return -EOPNOTSUPP;
 447 }
 448
 449 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 450                             int vf, struct ifla_vf_info *ivi)
 451 {
 452         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 453         if (vf >= adapter->num_vfs)
 454                 return -EINVAL;
 455         ivi->vf = vf;
 456         memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
 457         ivi->tx_rate = 0;
 458         ivi->vlan = adapter->vfinfo[vf].pf_vlan;
 459         ivi->qos = adapter->vfinfo[vf].pf_qos;
 460         return 0;
 461 }