drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2012 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 #include "ixgbe_type.h"
  44 #include "ixgbe_sriov.h"
  45
  46 #ifdef CONFIG_PCI_IOV
  47 void ixgbe_enable_sriov(struct ixgbe_adapter *adapter,
  48                          const struct ixgbe_info *ii)
  49 {
  50         struct ixgbe_hw *hw = &adapter->hw;
  51         int num_vf_macvlans, i;
  52         struct vf_macvlans *mv_list;
  53         int pre_existing_vfs = 0;
  54
  55         pre_existing_vfs = pci_num_vf(adapter->pdev);
  56         if (!pre_existing_vfs && !adapter->num_vfs)
  57                 return;
  58
  59         /* If there are pre-existing VFs then we have to force
  60          * use of that many because they were not deleted the last
  61          * time someone removed the PF driver.  That would have
  62          * been because they were allocated to guest VMs and can't
  63          * be removed.  Go ahead and just re-enable the old amount.
  64          * If the user wants to change the number of VFs they can
  65          * use ethtool while making sure no VFs are allocated to
  66          * guest VMs... i.e. the right way.
  67          */
  68         if (pre_existing_vfs) {
  69                 adapter->num_vfs = pre_existing_vfs;
  70                 dev_warn(&adapter->pdev->dev, "Virtual Functions already "
  71                          "enabled for this device - Please reload all "
  72                          "VF drivers to avoid spoofed packet errors\n");
  73         } else {
  74                 int err;
  75                 /*
  76                  * The 82599 supports up to 64 VFs per physical function
  77                  * but this implementation limits allocation to 63 so that
  78                  * basic networking resources are still available to the
  79                  * physical function.  If the user requests greater thn
  80                  * 63 VFs then it is an error - reset to default of zero.
  81                  */
  82                 adapter->num_vfs = min_t(unsigned int, adapter->num_vfs, 63);
  83
  84                 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
  85                 if (err) {
  86                         e_err(probe, "Failed to enable PCI sriov: %d\n", err);
  87                         adapter->num_vfs = 0;
  88                         return;
  89                 }
  90         }
  91
  92         adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
  93         e_info(probe, "SR-IOV enabled with %d VFs\n", adapter->num_vfs);
  94
  95         /* Enable VMDq flag so device will be set in VM mode */
  96         adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED;
  97         if (!adapter->ring_feature[RING_F_VMDQ].limit)
  98                 adapter->ring_feature[RING_F_VMDQ].limit = 1;
  99         adapter->ring_feature[RING_F_VMDQ].offset = adapter->num_vfs;
 100
 101         num_vf_macvlans = hw->mac.num_rar_entries -
 102         (IXGBE_MAX_PF_MACVLANS + 1 + adapter->num_vfs);
 103
 104         adapter->mv_list = mv_list = kcalloc(num_vf_macvlans,
 105                                              sizeof(struct vf_macvlans),
 106                                              GFP_KERNEL);
 107         if (mv_list) {
 108                 /* Initialize list of VF macvlans */
 109                 INIT_LIST_HEAD(&adapter->vf_mvs.l);
 110                 for (i = 0; i < num_vf_macvlans; i++) {
 111                         mv_list->vf = -1;
 112                         mv_list->free = true;
 113                         mv_list->rar_entry = hw->mac.num_rar_entries -
 114                                 (i + adapter->num_vfs + 1);
 115                         list_add(&mv_list->l, &adapter->vf_mvs.l);
 116                         mv_list++;
 117                 }
 118         }
 119
 120         /* If call to enable VFs succeeded then allocate memory
 121          * for per VF control structures.
 122          */
 123         adapter->vfinfo =
 124                 kcalloc(adapter->num_vfs,
 125                         sizeof(struct vf_data_storage), GFP_KERNEL);
 126         if (adapter->vfinfo) {
 127                 /* Now that we're sure SR-IOV is enabled
 128                  * and memory allocated set up the mailbox parameters
 129                  */
 130                 ixgbe_init_mbx_params_pf(hw);
 131                 memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
 132
 133                 /* limit trafffic classes based on VFs enabled */
 134                 if ((adapter->hw.mac.type == ixgbe_mac_82599EB) &&
 135                     (adapter->num_vfs < 16)) {
 136                         adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
 137                         adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
 138                 } else if (adapter->num_vfs < 32) {
 139                         adapter->dcb_cfg.num_tcs.pg_tcs = 4;
 140                         adapter->dcb_cfg.num_tcs.pfc_tcs = 4;
 141                 } else {
 142                         adapter->dcb_cfg.num_tcs.pg_tcs = 1;
 143                         adapter->dcb_cfg.num_tcs.pfc_tcs = 1;
 144                 }
 145
 146                 /* We do not support RSS w/ SR-IOV */
 147                 adapter->ring_feature[RING_F_RSS].limit = 1;
 148
 149                 /* Disable RSC when in SR-IOV mode */
 150                 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
 151                                      IXGBE_FLAG2_RSC_ENABLED);
 152
 153 #ifdef IXGBE_FCOE
 154                 /*
 155                  * When SR-IOV is enabled 82599 cannot support jumbo frames
 156                  * so we must disable FCoE because we cannot support FCoE MTU.
 157                  */
 158                 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
 159                         adapter->flags &= ~(IXGBE_FLAG_FCOE_ENABLED |
 160                                             IXGBE_FLAG_FCOE_CAPABLE);
 161 #endif
 162
 163                 /* enable spoof checking for all VFs */
 164                 for (i = 0; i < adapter->num_vfs; i++)
 165                         adapter->vfinfo[i].spoofchk_enabled = true;
 166                 return;
 167         }
 168
 169         /* Oh oh */
 170         e_err(probe, "Unable to allocate memory for VF Data Storage - "
 171               "SRIOV disabled\n");
 172         ixgbe_disable_sriov(adapter);
 173 }
 174
 175 static bool ixgbe_vfs_are_assigned(struct ixgbe_adapter *adapter)
 176 {
 177         struct pci_dev *pdev = adapter->pdev;
 178         struct pci_dev *vfdev;
 179         int dev_id;
 180
 181         switch (adapter->hw.mac.type) {
 182         case ixgbe_mac_82599EB:
 183                 dev_id = IXGBE_DEV_ID_82599_VF;
 184                 break;
 185         case ixgbe_mac_X540:
 186                 dev_id = IXGBE_DEV_ID_X540_VF;
 187                 break;
 188         default:
 189                 return false;
 190         }
 191
 192         /* loop through all the VFs to see if we own any that are assigned */
 193         vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL);
 194         while (vfdev) {
 195                 /* if we don't own it we don't care */
 196                 if (vfdev->is_virtfn && vfdev->physfn == pdev) {
 197                         /* if it is assigned we cannot release it */
 198                         if (vfdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED)
 199                                 return true;
 200                 }
 201
 202                 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, vfdev);
 203         }
 204
 205         return false;
 206 }
 207
 208 #endif /* #ifdef CONFIG_PCI_IOV */
 209 void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
 210 {
 211         struct ixgbe_hw *hw = &adapter->hw;
 212         u32 gpie;
 213         u32 vmdctl;
 214
 215         /* set num VFs to 0 to prevent access to vfinfo */
 216         adapter->num_vfs = 0;
 217
 218         /* free VF control structures */
 219         kfree(adapter->vfinfo);
 220         adapter->vfinfo = NULL;
 221
 222         /* free macvlan list */
 223         kfree(adapter->mv_list);
 224         adapter->mv_list = NULL;
 225
 226         /* if SR-IOV is already disabled then there is nothing to do */
 227         if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
 228                 return;
 229
 230 #ifdef CONFIG_PCI_IOV
 231         /*
 232          * If our VFs are assigned we cannot shut down SR-IOV
 233          * without causing issues, so just leave the hardware
 234          * available but disabled
 235          */
 236         if (ixgbe_vfs_are_assigned(adapter)) {
 237                 e_dev_warn("Unloading driver while VFs are assigned - VFs will not be deallocated\n");
 238                 return;
 239         }
 240         /* disable iov and allow time for transactions to clear */
 241         pci_disable_sriov(adapter->pdev);
 242 #endif
 243
 244         /* turn off device IOV mode */
 245         IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, 0);
 246         gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
 247         gpie &= ~IXGBE_GPIE_VTMODE_MASK;
 248         IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
 249
 250         /* set default pool back to 0 */
 251         vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
 252         vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
 253         IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
 254         IXGBE_WRITE_FLUSH(hw);
 255
 256         /* Disable VMDq flag so device will be set in VM mode */
 257         if (adapter->ring_feature[RING_F_VMDQ].limit == 1)
 258                 adapter->flags &= ~IXGBE_FLAG_VMDQ_ENABLED;
 259         adapter->ring_feature[RING_F_VMDQ].offset = 0;
 260
 261         /* take a breather then clean up driver data */
 262         msleep(100);
 263
 264         adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
 265 }
 266
 267 static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
 268                                    int entries, u16 *hash_list, u32 vf)
 269 {
 270         struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
 271         struct ixgbe_hw *hw = &adapter->hw;
 272         int i;
 273         u32 vector_bit;
 274         u32 vector_reg;
 275         u32 mta_reg;
 276
 277         /* only so many hash values supported */
 278         entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES);
 279
 280         /*
 281          * salt away the number of multi cast addresses assigned
 282          * to this VF for later use to restore when the PF multi cast
 283          * list changes
 284          */
 285         vfinfo->num_vf_mc_hashes = entries;
 286
 287         /*
 288          * VFs are limited to using the MTA hash table for their multicast
 289          * addresses
 290          */
 291         for (i = 0; i < entries; i++) {
 292                 vfinfo->vf_mc_hashes[i] = hash_list[i];
 293         }
 294
 295         for (i = 0; i < vfinfo->num_vf_mc_hashes; i++) {
 296                 vector_reg = (vfinfo->vf_mc_hashes[i] >> 5) & 0x7F;
 297                 vector_bit = vfinfo->vf_mc_hashes[i] & 0x1F;
 298                 mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
 299                 mta_reg |= (1 << vector_bit);
 300                 IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
 301         }
 302
 303         return 0;
 304 }
 305
 306 static void ixgbe_restore_vf_macvlans(struct ixgbe_adapter *adapter)
 307 {
 308         struct ixgbe_hw *hw = &adapter->hw;
 309         struct list_head *pos;
 310         struct vf_macvlans *entry;
 311
 312         list_for_each(pos, &adapter->vf_mvs.l) {
 313                 entry = list_entry(pos, struct vf_macvlans, l);
 314                 if (!entry->free)
 315                         hw->mac.ops.set_rar(hw, entry->rar_entry,
 316                                             entry->vf_macvlan,
 317                                             entry->vf, IXGBE_RAH_AV);
 318         }
 319 }
 320
 321 void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter)
 322 {
 323         struct ixgbe_hw *hw = &adapter->hw;
 324         struct vf_data_storage *vfinfo;
 325         int i, j;
 326         u32 vector_bit;
 327         u32 vector_reg;
 328         u32 mta_reg;
 329
 330         for (i = 0; i < adapter->num_vfs; i++) {
 331                 vfinfo = &adapter->vfinfo[i];
 332                 for (j = 0; j < vfinfo->num_vf_mc_hashes; j++) {
 333                         hw->addr_ctrl.mta_in_use++;
 334                         vector_reg = (vfinfo->vf_mc_hashes[j] >> 5) & 0x7F;
 335                         vector_bit = vfinfo->vf_mc_hashes[j] & 0x1F;
 336                         mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
 337                         mta_reg |= (1 << vector_bit);
 338                         IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
 339                 }
 340         }
 341
 342         /* Restore any VF macvlans */
 343         ixgbe_restore_vf_macvlans(adapter);
 344 }
 345
 346 static int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid,
 347                              u32 vf)
 348 {
 349         return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
 350 }
 351
 352 static void ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf)
 353 {
 354         struct ixgbe_hw *hw = &adapter->hw;
 355         int new_mtu = msgbuf[1];
 356         u32 max_frs;
 357         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
 358
 359         /* Only X540 supports jumbo frames in IOV mode */
 360         if (adapter->hw.mac.type != ixgbe_mac_X540)
 361                 return;
 362
 363         /* MTU < 68 is an error and causes problems on some kernels */
 364         if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) {
 365                 e_err(drv, "VF mtu %d out of range\n", new_mtu);
 366                 return;
 367         }
 368
 369         max_frs = (IXGBE_READ_REG(hw, IXGBE_MAXFRS) &
 370                    IXGBE_MHADD_MFS_MASK) >> IXGBE_MHADD_MFS_SHIFT;
 371         if (max_frs < new_mtu) {
 372                 max_frs = new_mtu << IXGBE_MHADD_MFS_SHIFT;
 373                 IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, max_frs);
 374         }
 375
 376         e_info(hw, "VF requests change max MTU to %d\n", new_mtu);
 377 }
 378
 379 static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe)
 380 {
 381         u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
 382         vmolr |= (IXGBE_VMOLR_ROMPE |
 383                   IXGBE_VMOLR_BAM);
 384         if (aupe)
 385                 vmolr |= IXGBE_VMOLR_AUPE;
 386         else
 387                 vmolr &= ~IXGBE_VMOLR_AUPE;
 388         IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
 389 }
 390
 391 static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, u32 vid, u32 vf)
 392 {
 393         struct ixgbe_hw *hw = &adapter->hw;
 394
 395         if (vid)
 396                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf),
 397                                 (vid | IXGBE_VMVIR_VLANA_DEFAULT));
 398         else
 399                 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
 400 }
 401
 402 static inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
 403 {
 404         struct ixgbe_hw *hw = &adapter->hw;
 405         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 406
 407         /* reset offloads to defaults */
 408         if (adapter->vfinfo[vf].pf_vlan) {
 409                 ixgbe_set_vf_vlan(adapter, true,
 410                                   adapter->vfinfo[vf].pf_vlan, vf);
 411                 ixgbe_set_vmvir(adapter,
 412                                 (adapter->vfinfo[vf].pf_vlan |
 413                                  (adapter->vfinfo[vf].pf_qos <<
 414                                   VLAN_PRIO_SHIFT)), vf);
 415                 ixgbe_set_vmolr(hw, vf, false);
 416         } else {
 417                 ixgbe_set_vmvir(adapter, 0, vf);
 418                 ixgbe_set_vmolr(hw, vf, true);
 419         }
 420
 421         /* reset multicast table array for vf */
 422         adapter->vfinfo[vf].num_vf_mc_hashes = 0;
 423
 424         /* Flush and reset the mta with the new values */
 425         ixgbe_set_rx_mode(adapter->netdev);
 426
 427         hw->mac.ops.clear_rar(hw, rar_entry);
 428 }
 429
 430 static int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
 431                             int vf, unsigned char *mac_addr)
 432 {
 433         struct ixgbe_hw *hw = &adapter->hw;
 434         int rar_entry = hw->mac.num_rar_entries - (vf + 1);
 435
 436         memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
 437         hw->mac.ops.set_rar(hw, rar_entry, mac_addr, vf, IXGBE_RAH_AV);
 438
 439         return 0;
 440 }
 441
 442 static int ixgbe_set_vf_macvlan(struct ixgbe_adapter *adapter,
 443                                 int vf, int index, unsigned char *mac_addr)
 444 {
 445         struct ixgbe_hw *hw = &adapter->hw;
 446         struct list_head *pos;
 447         struct vf_macvlans *entry;
 448
 449         if (index <= 1) {
 450                 list_for_each(pos, &adapter->vf_mvs.l) {
 451                         entry = list_entry(pos, struct vf_macvlans, l);
 452                         if (entry->vf == vf) {
 453                                 entry->vf = -1;
 454                                 entry->free = true;
 455                                 entry->is_macvlan = false;
 456                                 hw->mac.ops.clear_rar(hw, entry->rar_entry);
 457                         }
 458                 }
 459         }
 460
 461         /*
 462          * If index was zero then we were asked to clear the uc list
 463          * for the VF.  We're done.
 464          */
 465         if (!index)
 466                 return 0;
 467
 468         entry = NULL;
 469
 470         list_for_each(pos, &adapter->vf_mvs.l) {
 471                 entry = list_entry(pos, struct vf_macvlans, l);
 472                 if (entry->free)
 473                         break;
 474         }
 475
 476         /*
 477          * If we traversed the entire list and didn't find a free entry
 478          * then we're out of space on the RAR table.  Also entry may
 479          * be NULL because the original memory allocation for the list
 480          * failed, which is not fatal but does mean we can't support
 481          * VF requests for MACVLAN because we couldn't allocate
 482          * memory for the list management required.
 483          */
 484         if (!entry || !entry->free)
 485                 return -ENOSPC;
 486
 487         entry->free = false;
 488         entry->is_macvlan = true;
 489         entry->vf = vf;
 490         memcpy(entry->vf_macvlan, mac_addr, ETH_ALEN);
 491
 492         hw->mac.ops.set_rar(hw, entry->rar_entry, mac_addr, vf, IXGBE_RAH_AV);
 493
 494         return 0;
 495 }
 496
 497 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 498 {
 499         unsigned char vf_mac_addr[6];
 500         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
 501         unsigned int vfn = (event_mask & 0x3f);
 502
 503         bool enable = ((event_mask & 0x10000000U) != 0);
 504
 505         if (enable) {
 506                 eth_random_addr(vf_mac_addr);
 507                 e_info(probe, "IOV: VF %d is enabled MAC %pM\n",
 508                        vfn, vf_mac_addr);
 509                 /*
 510                  * Store away the VF "permananet" MAC address, it will ask
 511                  * for it later.
 512                  */
 513                 memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
 514         }
 515
 516         return 0;
 517 }
 518
 519 static inline void ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
 520 {
 521         struct ixgbe_hw *hw = &adapter->hw;
 522         u32 reg;
 523         u32 reg_offset, vf_shift;
 524
 525         vf_shift = vf % 32;
 526         reg_offset = vf / 32;
 527
 528         /* enable transmit and receive for vf */
 529         reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
 530         reg |= (reg | (1 << vf_shift));
 531         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
 532
 533         reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
 534         reg |= (reg | (1 << vf_shift));
 535         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
 536
 537         /* Enable counting of spoofed packets in the SSVPC register */
 538         reg = IXGBE_READ_REG(hw, IXGBE_VMECM(reg_offset));
 539         reg |= (1 << vf_shift);
 540         IXGBE_WRITE_REG(hw, IXGBE_VMECM(reg_offset), reg);
 541
 542         ixgbe_vf_reset_event(adapter, vf);
 543 }
 544
 545 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 546 {
 547         u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
 548         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 549         struct ixgbe_hw *hw = &adapter->hw;
 550         s32 retval;
 551         int entries;
 552         u16 *hash_list;
 553         int add, vid, index;
 554         u8 *new_mac;
 555
 556         retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 557
 558         if (retval) {
 559                 pr_err("Error receiving message from VF\n");
 560                 return retval;
 561         }
 562
 563         /* this is a message we already processed, do nothing */
 564         if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
 565                 return retval;
 566
 567         /* flush the ack before we write any messages back */
 568         IXGBE_WRITE_FLUSH(hw);
 569
 570         /*
 571          * until the vf completes a virtual function reset it should not be
 572          * allowed to start any configuration.
 573          */
 574
 575         if (msgbuf[0] == IXGBE_VF_RESET) {
 576                 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
 577                 new_mac = (u8 *)(&msgbuf[1]);
 578                 e_info(probe, "VF Reset msg received from vf %d\n", vf);
 579                 adapter->vfinfo[vf].clear_to_send = false;
 580                 ixgbe_vf_reset_msg(adapter, vf);
 581                 adapter->vfinfo[vf].clear_to_send = true;
 582
 583                 if (is_valid_ether_addr(new_mac) &&
 584                     !adapter->vfinfo[vf].pf_set_mac)
 585                         ixgbe_set_vf_mac(adapter, vf, vf_mac);
 586                 else
 587                         ixgbe_set_vf_mac(adapter,
 588                                  vf, adapter->vfinfo[vf].vf_mac_addresses);
 589
 590                 /* reply to reset with ack and vf mac address */
 591                 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
 592                 memcpy(new_mac, vf_mac, ETH_ALEN);
 593                 /*
 594                  * Piggyback the multicast filter type so VF can compute the
 595                  * correct vectors
 596                  */
 597                 msgbuf[3] = hw->mac.mc_filter_type;
 598                 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
 599
 600                 return retval;
 601         }
 602
 603         if (!adapter->vfinfo[vf].clear_to_send) {
 604                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 605                 ixgbe_write_mbx(hw, msgbuf, 1, vf);
 606                 return retval;
 607         }
 608
 609         switch ((msgbuf[0] & 0xFFFF)) {
 610         case IXGBE_VF_SET_MAC_ADDR:
 611                 new_mac = ((u8 *)(&msgbuf[1]));
 612                 if (is_valid_ether_addr(new_mac) &&
 613                     !adapter->vfinfo[vf].pf_set_mac) {
 614                         ixgbe_set_vf_mac(adapter, vf, new_mac);
 615                 } else if (memcmp(adapter->vfinfo[vf].vf_mac_addresses,
 616                                   new_mac, ETH_ALEN)) {
 617                         e_warn(drv, "VF %d attempted to override "
 618                                "administratively set MAC address\nReload "
 619                                "the VF driver to resume operations\n", vf);
 620                         retval = -1;
 621                 }
 622                 break;
 623         case IXGBE_VF_SET_MULTICAST:
 624                 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 625                           >> IXGBE_VT_MSGINFO_SHIFT;
 626                 hash_list = (u16 *)&msgbuf[1];
 627                 retval = ixgbe_set_vf_multicasts(adapter, entries,
 628                                                  hash_list, vf);
 629                 break;
 630         case IXGBE_VF_SET_LPE:
 631                 ixgbe_set_vf_lpe(adapter, msgbuf);
 632                 break;
 633         case IXGBE_VF_SET_VLAN:
 634                 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 635                       >> IXGBE_VT_MSGINFO_SHIFT;
 636                 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
 637                 if (adapter->vfinfo[vf].pf_vlan) {
 638                         e_warn(drv, "VF %d attempted to override "
 639                                "administratively set VLAN configuration\n"
 640                                "Reload the VF driver to resume operations\n",
 641                                vf);
 642                         retval = -1;
 643                 } else {
 644                         if (add)
 645                                 adapter->vfinfo[vf].vlan_count++;
 646                         else if (adapter->vfinfo[vf].vlan_count)
 647                                 adapter->vfinfo[vf].vlan_count--;
 648                         retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
 649                         if (!retval && adapter->vfinfo[vf].spoofchk_enabled)
 650                                 hw->mac.ops.set_vlan_anti_spoofing(hw, true, vf);
 651                 }
 652                 break;
 653         case IXGBE_VF_SET_MACVLAN:
 654                 index = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK) >>
 655                         IXGBE_VT_MSGINFO_SHIFT;
 656                 if (adapter->vfinfo[vf].pf_set_mac && index > 0) {
 657                         e_warn(drv, "VF %d requested MACVLAN filter but is "
 658                                     "administratively denied\n", vf);
 659                         retval = -1;
 660                         break;
 661                 }
 662                 /*
 663                  * If the VF is allowed to set MAC filters then turn off
 664                  * anti-spoofing to avoid false positives.  An index
 665                  * greater than 0 will indicate the VF is setting a
 666                  * macvlan MAC filter.
 667                  */
 668                 if (index > 0 && adapter->vfinfo[vf].spoofchk_enabled)
 669                         ixgbe_ndo_set_vf_spoofchk(adapter->netdev, vf, false);
 670                 retval = ixgbe_set_vf_macvlan(adapter, vf, index,
 671                                               (unsigned char *)(&msgbuf[1]));
 672                 if (retval == -ENOSPC)
 673                         e_warn(drv, "VF %d has requested a MACVLAN filter "
 674                                     "but there is no space for it\n", vf);
 675                 break;
 676         default:
 677                 e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
 678                 retval = IXGBE_ERR_MBX;
 679                 break;
 680         }
 681
 682         /* notify the VF of the results of what it sent us */
 683         if (retval)
 684                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 685         else
 686                 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
 687
 688         msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
 689
 690         ixgbe_write_mbx(hw, msgbuf, 1, vf);
 691
 692         return retval;
 693 }
 694
 695 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 696 {
 697         struct ixgbe_hw *hw = &adapter->hw;
 698         u32 msg = IXGBE_VT_MSGTYPE_NACK;
 699
 700         /* if device isn't clear to send it shouldn't be reading either */
 701         if (!adapter->vfinfo[vf].clear_to_send)
 702                 ixgbe_write_mbx(hw, &msg, 1, vf);
 703 }
 704
 705 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
 706 {
 707         struct ixgbe_hw *hw = &adapter->hw;
 708         u32 vf;
 709
 710         for (vf = 0; vf < adapter->num_vfs; vf++) {
 711                 /* process any reset requests */
 712                 if (!ixgbe_check_for_rst(hw, vf))
 713                         ixgbe_vf_reset_event(adapter, vf);
 714
 715                 /* process any messages pending */
 716                 if (!ixgbe_check_for_msg(hw, vf))
 717                         ixgbe_rcv_msg_from_vf(adapter, vf);
 718
 719                 /* process any acks */
 720                 if (!ixgbe_check_for_ack(hw, vf))
 721                         ixgbe_rcv_ack_from_vf(adapter, vf);
 722         }
 723 }
 724
 725 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
 726 {
 727         struct ixgbe_hw *hw = &adapter->hw;
 728
 729         /* disable transmit and receive for all vfs */
 730         IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
 731         IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
 732
 733         IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
 734         IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
 735 }
 736
 737 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
 738 {
 739         struct ixgbe_hw *hw = &adapter->hw;
 740         u32 ping;
 741         int i;
 742
 743         for (i = 0 ; i < adapter->num_vfs; i++) {
 744                 ping = IXGBE_PF_CONTROL_MSG;
 745                 if (adapter->vfinfo[i].clear_to_send)
 746                         ping |= IXGBE_VT_MSGTYPE_CTS;
 747                 ixgbe_write_mbx(hw, &ping, 1, i);
 748         }
 749 }
 750
 751 int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 752 {
 753         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 754         if (!is_valid_ether_addr(mac) || (vf >= adapter->num_vfs))
 755                 return -EINVAL;
 756         adapter->vfinfo[vf].pf_set_mac = true;
 757         dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
 758         dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
 759                                       " change effective.");
 760         if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 761                 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
 762                          " but the PF device is not up.\n");
 763                 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
 764                          " attempting to use the VF device.\n");
 765         }
 766         return ixgbe_set_vf_mac(adapter, vf, mac);
 767 }
 768
 769 int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 770 {
 771         int err = 0;
 772         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 773         struct ixgbe_hw *hw = &adapter->hw;
 774
 775         if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
 776                 return -EINVAL;
 777         if (vlan || qos) {
 778                 err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
 779                 if (err)
 780                         goto out;
 781                 ixgbe_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
 782                 ixgbe_set_vmolr(hw, vf, false);
 783                 if (adapter->vfinfo[vf].spoofchk_enabled)
 784                         hw->mac.ops.set_vlan_anti_spoofing(hw, true, vf);
 785                 adapter->vfinfo[vf].vlan_count++;
 786                 adapter->vfinfo[vf].pf_vlan = vlan;
 787                 adapter->vfinfo[vf].pf_qos = qos;
 788                 dev_info(&adapter->pdev->dev,
 789                          "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
 790                 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
 791                         dev_warn(&adapter->pdev->dev,
 792                                  "The VF VLAN has been set,"
 793                                  " but the PF device is not up.\n");
 794                         dev_warn(&adapter->pdev->dev,
 795                                  "Bring the PF device up before"
 796                                  " attempting to use the VF device.\n");
 797                 }
 798         } else {
 799                 err = ixgbe_set_vf_vlan(adapter, false,
 800                                         adapter->vfinfo[vf].pf_vlan, vf);
 801                 ixgbe_set_vmvir(adapter, vlan, vf);
 802                 ixgbe_set_vmolr(hw, vf, true);
 803                 hw->mac.ops.set_vlan_anti_spoofing(hw, false, vf);
 804                 if (adapter->vfinfo[vf].vlan_count)
 805                         adapter->vfinfo[vf].vlan_count--;
 806                 adapter->vfinfo[vf].pf_vlan = 0;
 807                 adapter->vfinfo[vf].pf_qos = 0;
 808        }
 809 out:
 810        return err;
 811 }
 812
 813 static int ixgbe_link_mbps(int internal_link_speed)
 814 {
 815         switch (internal_link_speed) {
 816         case IXGBE_LINK_SPEED_100_FULL:
 817                 return 100;
 818         case IXGBE_LINK_SPEED_1GB_FULL:
 819                 return 1000;
 820         case IXGBE_LINK_SPEED_10GB_FULL:
 821                 return 10000;
 822         default:
 823                 return 0;
 824         }
 825 }
 826
 827 static void ixgbe_set_vf_rate_limit(struct ixgbe_hw *hw, int vf, int tx_rate,
 828                                     int link_speed)
 829 {
 830         int rf_dec, rf_int;
 831         u32 bcnrc_val;
 832
 833         if (tx_rate != 0) {
 834                 /* Calculate the rate factor values to set */
 835                 rf_int = link_speed / tx_rate;
 836                 rf_dec = (link_speed - (rf_int * tx_rate));
 837                 rf_dec = (rf_dec * (1<<IXGBE_RTTBCNRC_RF_INT_SHIFT)) / tx_rate;
 838
 839                 bcnrc_val = IXGBE_RTTBCNRC_RS_ENA;
 840                 bcnrc_val |= ((rf_int<<IXGBE_RTTBCNRC_RF_INT_SHIFT) &
 841                                IXGBE_RTTBCNRC_RF_INT_MASK);
 842                 bcnrc_val |= (rf_dec & IXGBE_RTTBCNRC_RF_DEC_MASK);
 843         } else {
 844                 bcnrc_val = 0;
 845         }
 846
 847         IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, 2*vf); /* vf Y uses queue 2*Y */
 848         /*
 849          * Set global transmit compensation time to the MMW_SIZE in RTTBCNRM
 850          * register. Typically MMW_SIZE=0x014 if 9728-byte jumbo is supported
 851          * and 0x004 otherwise.
 852          */
 853         switch (hw->mac.type) {
 854         case ixgbe_mac_82599EB:
 855                 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRM, 0x4);
 856                 break;
 857         case ixgbe_mac_X540:
 858                 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRM, 0x14);
 859                 break;
 860         default:
 861                 break;
 862         }
 863
 864         IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
 865 }
 866
 867 void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter)
 868 {
 869         int actual_link_speed, i;
 870         bool reset_rate = false;
 871
 872         /* VF Tx rate limit was not set */
 873         if (adapter->vf_rate_link_speed == 0)
 874                 return;
 875
 876         actual_link_speed = ixgbe_link_mbps(adapter->link_speed);
 877         if (actual_link_speed != adapter->vf_rate_link_speed) {
 878                 reset_rate = true;
 879                 adapter->vf_rate_link_speed = 0;
 880                 dev_info(&adapter->pdev->dev,
 881                          "Link speed has been changed. VF Transmit rate "
 882                          "is disabled\n");
 883         }
 884
 885         for (i = 0; i < adapter->num_vfs; i++) {
 886                 if (reset_rate)
 887                         adapter->vfinfo[i].tx_rate = 0;
 888
 889                 ixgbe_set_vf_rate_limit(&adapter->hw, i,
 890                                         adapter->vfinfo[i].tx_rate,
 891                                         actual_link_speed);
 892         }
 893 }
 894
 895 int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
 896 {
 897         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 898         struct ixgbe_hw *hw = &adapter->hw;
 899         int actual_link_speed;
 900
 901         actual_link_speed = ixgbe_link_mbps(adapter->link_speed);
 902         if ((vf >= adapter->num_vfs) || (!adapter->link_up) ||
 903             (tx_rate > actual_link_speed) || (actual_link_speed != 10000) ||
 904             ((tx_rate != 0) && (tx_rate <= 10)))
 905             /* rate limit cannot be set to 10Mb or less in 10Gb adapters */
 906                 return -EINVAL;
 907
 908         adapter->vf_rate_link_speed = actual_link_speed;
 909         adapter->vfinfo[vf].tx_rate = (u16)tx_rate;
 910         ixgbe_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
 911
 912         return 0;
 913 }
 914
 915 int ixgbe_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting)
 916 {
 917         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 918         int vf_target_reg = vf >> 3;
 919         int vf_target_shift = vf % 8;
 920         struct ixgbe_hw *hw = &adapter->hw;
 921         u32 regval;
 922
 923         adapter->vfinfo[vf].spoofchk_enabled = setting;
 924
 925         regval = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
 926         regval &= ~(1 << vf_target_shift);
 927         regval |= (setting << vf_target_shift);
 928         IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), regval);
 929
 930         if (adapter->vfinfo[vf].vlan_count) {
 931                 vf_target_shift += IXGBE_SPOOF_VLANAS_SHIFT;
 932                 regval = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
 933                 regval &= ~(1 << vf_target_shift);
 934                 regval |= (setting << vf_target_shift);
 935                 IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), regval);
 936         }
 937
 938         return 0;
 939 }
 940
 941 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 942                             int vf, struct ifla_vf_info *ivi)
 943 {
 944         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 945         if (vf >= adapter->num_vfs)
 946                 return -EINVAL;
 947         ivi->vf = vf;
 948         memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
 949         ivi->tx_rate = adapter->vfinfo[vf].tx_rate;
 950         ivi->vlan = adapter->vfinfo[vf].pf_vlan;
 951         ivi->qos = adapter->vfinfo[vf].pf_qos;
 952         ivi->spoofchk = adapter->vfinfo[vf].spoofchk_enabled;
 953         return 0;
 954 }