root/drivers/net/ethernet/intel/ixgbevf/vf.c

DEFINITIONS

1. ixgbevf_write_msg_read_ack
2. ixgbevf_start_hw_vf
3. ixgbevf_init_hw_vf
4. ixgbevf_reset_hw_vf
5. ixgbevf_hv_reset_hw_vf
6. ixgbevf_stop_hw_vf
7. ixgbevf_mta_vector
8. ixgbevf_get_mac_addr_vf
9. ixgbevf_set_uc_addr_vf
10. ixgbevf_hv_set_uc_addr_vf
11. ixgbevf_get_reta_locked
12. ixgbevf_get_rss_key_locked
13. ixgbevf_set_rar_vf
14. ixgbevf_hv_set_rar_vf
15. ixgbevf_update_mc_addr_list_vf
16. ixgbevf_hv_update_mc_addr_list_vf
17. ixgbevf_update_xcast_mode
18. ixgbevf_hv_update_xcast_mode
19. ixgbevf_set_vfta_vf
20. ixgbevf_hv_set_vfta_vf
21. ixgbevf_setup_mac_link_vf
22. ixgbevf_check_mac_link_vf
23. ixgbevf_hv_check_mac_link_vf
24. ixgbevf_set_rlpml_vf
25. ixgbevf_hv_set_rlpml_vf
26. ixgbevf_negotiate_api_version_vf
27. ixgbevf_hv_negotiate_api_version_vf
28. ixgbevf_get_queues

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
   3 
   4 #include "vf.h"
   5 #include "ixgbevf.h"
   6 
   7 /* On Hyper-V, to reset, we need to read from this offset
   8  * from the PCI config space. This is the mechanism used on
   9  * Hyper-V to support PF/VF communication.
  10  */
  11 #define IXGBE_HV_RESET_OFFSET           0x201
  12 
  13 static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg,
  14                                              u32 *retmsg, u16 size)
  15 {
  16         struct ixgbe_mbx_info *mbx = &hw->mbx;
  17         s32 retval = mbx->ops.write_posted(hw, msg, size);
  18 
  19         if (retval)
  20                 return retval;
  21 
  22         return mbx->ops.read_posted(hw, retmsg, size);
  23 }
  24 
  25 /**
  26  *  ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
  27  *  @hw: pointer to hardware structure
  28  *
  29  *  Starts the hardware by filling the bus info structure and media type, clears
  30  *  all on chip counters, initializes receive address registers, multicast
  31  *  table, VLAN filter table, calls routine to set up link and flow control
  32  *  settings, and leaves transmit and receive units disabled and uninitialized
  33  **/
  34 static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
  35 {
  36         /* Clear adapter stopped flag */
  37         hw->adapter_stopped = false;
  38 
  39         return 0;
  40 }
  41 
  42 /**
  43  *  ixgbevf_init_hw_vf - virtual function hardware initialization
  44  *  @hw: pointer to hardware structure
  45  *
  46  *  Initialize the hardware by resetting the hardware and then starting
  47  *  the hardware
  48  **/
  49 static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
  50 {
  51         s32 status = hw->mac.ops.start_hw(hw);
  52 
  53         hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
  54 
  55         return status;
  56 }
  57 
  58 /**
  59  *  ixgbevf_reset_hw_vf - Performs hardware reset
  60  *  @hw: pointer to hardware structure
  61  *
  62  *  Resets the hardware by resetting the transmit and receive units, masks and
  63  *  clears all interrupts.
  64  **/
  65 static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
  66 {
  67         struct ixgbe_mbx_info *mbx = &hw->mbx;
  68         u32 timeout = IXGBE_VF_INIT_TIMEOUT;
  69         s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
  70         u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
  71         u8 *addr = (u8 *)(&msgbuf[1]);
  72 
  73         /* Call adapter stop to disable tx/rx and clear interrupts */
  74         hw->mac.ops.stop_adapter(hw);
  75 
  76         /* reset the api version */
  77         hw->api_version = ixgbe_mbox_api_10;
  78 
  79         IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
  80         IXGBE_WRITE_FLUSH(hw);
  81 
  82         /* we cannot reset while the RSTI / RSTD bits are asserted */
  83         while (!mbx->ops.check_for_rst(hw) && timeout) {
  84                 timeout--;
  85                 udelay(5);
  86         }
  87 
  88         if (!timeout)
  89                 return IXGBE_ERR_RESET_FAILED;
  90 
  91         /* mailbox timeout can now become active */
  92         mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
  93 
  94         msgbuf[0] = IXGBE_VF_RESET;
  95         mbx->ops.write_posted(hw, msgbuf, 1);
  96 
  97         mdelay(10);
  98 
  99         /* set our "perm_addr" based on info provided by PF
 100          * also set up the mc_filter_type which is piggy backed
 101          * on the mac address in word 3
 102          */
 103         ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
 104         if (ret_val)
 105                 return ret_val;
 106 
 107         /* New versions of the PF may NACK the reset return message
 108          * to indicate that no MAC address has yet been assigned for
 109          * the VF.
 110          */
 111         if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK) &&
 112             msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_NACK))
 113                 return IXGBE_ERR_INVALID_MAC_ADDR;
 114 
 115         if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
 116                 ether_addr_copy(hw->mac.perm_addr, addr);
 117 
 118         hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
 119 
 120         return 0;
 121 }
 122 
 123 /**
 124  * Hyper-V variant; the VF/PF communication is through the PCI
 125  * config space.
 126  * @hw: pointer to private hardware struct
 127  */
 128 static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
 129 {
 130 #if IS_ENABLED(CONFIG_PCI_MMCONFIG)
 131         struct ixgbevf_adapter *adapter = hw->back;
 132         int i;
 133 
 134         for (i = 0; i < 6; i++)
 135                 pci_read_config_byte(adapter->pdev,
 136                                      (i + IXGBE_HV_RESET_OFFSET),
 137                                      &hw->mac.perm_addr[i]);
 138         return 0;
 139 #else
 140         pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
 141         return -EOPNOTSUPP;
 142 #endif
 143 }
 144 
 145 /**
 146  *  ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
 147  *  @hw: pointer to hardware structure
 148  *
 149  *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
 150  *  disables transmit and receive units. The adapter_stopped flag is used by
 151  *  the shared code and drivers to determine if the adapter is in a stopped
 152  *  state and should not touch the hardware.
 153  **/
 154 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
 155 {
 156         u32 number_of_queues;
 157         u32 reg_val;
 158         u16 i;
 159 
 160         /* Set the adapter_stopped flag so other driver functions stop touching
 161          * the hardware
 162          */
 163         hw->adapter_stopped = true;
 164 
 165         /* Disable the receive unit by stopped each queue */
 166         number_of_queues = hw->mac.max_rx_queues;
 167         for (i = 0; i < number_of_queues; i++) {
 168                 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
 169                 if (reg_val & IXGBE_RXDCTL_ENABLE) {
 170                         reg_val &= ~IXGBE_RXDCTL_ENABLE;
 171                         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
 172                 }
 173         }
 174 
 175         IXGBE_WRITE_FLUSH(hw);
 176 
 177         /* Clear interrupt mask to stop from interrupts being generated */
 178         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
 179 
 180         /* Clear any pending interrupts */
 181         IXGBE_READ_REG(hw, IXGBE_VTEICR);
 182 
 183         /* Disable the transmit unit.  Each queue must be disabled. */
 184         number_of_queues = hw->mac.max_tx_queues;
 185         for (i = 0; i < number_of_queues; i++) {
 186                 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
 187                 if (reg_val & IXGBE_TXDCTL_ENABLE) {
 188                         reg_val &= ~IXGBE_TXDCTL_ENABLE;
 189                         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
 190                 }
 191         }
 192 
 193         return 0;
 194 }
 195 
 196 /**
 197  *  ixgbevf_mta_vector - Determines bit-vector in multicast table to set
 198  *  @hw: pointer to hardware structure
 199  *  @mc_addr: the multicast address
 200  *
 201  *  Extracts the 12 bits, from a multicast address, to determine which
 202  *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
 203  *  incoming Rx multicast addresses, to determine the bit-vector to check in
 204  *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
 205  *  by the MO field of the MCSTCTRL. The MO field is set during initialization
 206  *  to mc_filter_type.
 207  **/
 208 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
 209 {
 210         u32 vector = 0;
 211 
 212         switch (hw->mac.mc_filter_type) {
 213         case 0:   /* use bits [47:36] of the address */
 214                 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
 215                 break;
 216         case 1:   /* use bits [46:35] of the address */
 217                 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
 218                 break;
 219         case 2:   /* use bits [45:34] of the address */
 220                 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
 221                 break;
 222         case 3:   /* use bits [43:32] of the address */
 223                 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
 224                 break;
 225         default:  /* Invalid mc_filter_type */
 226                 break;
 227         }
 228 
 229         /* vector can only be 12-bits or boundary will be exceeded */
 230         vector &= 0xFFF;
 231         return vector;
 232 }
 233 
 234 /**
 235  *  ixgbevf_get_mac_addr_vf - Read device MAC address
 236  *  @hw: pointer to the HW structure
 237  *  @mac_addr: pointer to storage for retrieved MAC address
 238  **/
 239 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
 240 {
 241         ether_addr_copy(mac_addr, hw->mac.perm_addr);
 242 
 243         return 0;
 244 }
 245 
 246 static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
 247 {
 248         u32 msgbuf[3], msgbuf_chk;
 249         u8 *msg_addr = (u8 *)(&msgbuf[1]);
 250         s32 ret_val;
 251 
 252         memset(msgbuf, 0, sizeof(msgbuf));
 253         /* If index is one then this is the start of a new list and needs
 254          * indication to the PF so it can do it's own list management.
 255          * If it is zero then that tells the PF to just clear all of
 256          * this VF's macvlans and there is no new list.
 257          */
 258         msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
 259         msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
 260         msgbuf_chk = msgbuf[0];
 261 
 262         if (addr)
 263                 ether_addr_copy(msg_addr, addr);
 264 
 265         ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
 266                                              ARRAY_SIZE(msgbuf));
 267         if (!ret_val) {
 268                 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 269 
 270                 if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_NACK))
 271                         return -ENOMEM;
 272         }
 273 
 274         return ret_val;
 275 }
 276 
 277 static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
 278 {
 279         return -EOPNOTSUPP;
 280 }
 281 
 282 /**
 283  * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
 284  * @hw: pointer to hardware structure
 285  * @reta: buffer to fill with RETA contents.
 286  * @num_rx_queues: Number of Rx queues configured for this port
 287  *
 288  * The "reta" buffer should be big enough to contain 32 registers.
 289  *
 290  * Returns: 0 on success.
 291  *          if API doesn't support this operation - (-EOPNOTSUPP).
 292  */
 293 int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
 294 {
 295         int err, i, j;
 296         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 297         u32 *hw_reta = &msgbuf[1];
 298         u32 mask = 0;
 299 
 300         /* We have to use a mailbox for 82599 and x540 devices only.
 301          * For these devices RETA has 128 entries.
 302          * Also these VFs support up to 4 RSS queues. Therefore PF will compress
 303          * 16 RETA entries in each DWORD giving 2 bits to each entry.
 304          */
 305         int dwords = IXGBEVF_82599_RETA_SIZE / 16;
 306 
 307         /* We support the RSS querying for 82599 and x540 devices only.
 308          * Thus return an error if API doesn't support RETA querying or querying
 309          * is not supported for this device type.
 310          */
 311         switch (hw->api_version) {
 312         case ixgbe_mbox_api_14:
 313         case ixgbe_mbox_api_13:
 314         case ixgbe_mbox_api_12:
 315                 if (hw->mac.type < ixgbe_mac_X550_vf)
 316                         break;
 317                 /* fall through */
 318         default:
 319                 return -EOPNOTSUPP;
 320         }
 321 
 322         msgbuf[0] = IXGBE_VF_GET_RETA;
 323 
 324         err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
 325 
 326         if (err)
 327                 return err;
 328 
 329         err = hw->mbx.ops.read_posted(hw, msgbuf, dwords + 1);
 330 
 331         if (err)
 332                 return err;
 333 
 334         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 335 
 336         /* If the operation has been refused by a PF return -EPERM */
 337         if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
 338                 return -EPERM;
 339 
 340         /* If we didn't get an ACK there must have been
 341          * some sort of mailbox error so we should treat it
 342          * as such.
 343          */
 344         if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
 345                 return IXGBE_ERR_MBX;
 346 
 347         /* ixgbevf doesn't support more than 2 queues at the moment */
 348         if (num_rx_queues > 1)
 349                 mask = 0x1;
 350 
 351         for (i = 0; i < dwords; i++)
 352                 for (j = 0; j < 16; j++)
 353                         reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
 354 
 355         return 0;
 356 }
 357 
 358 /**
 359  * ixgbevf_get_rss_key_locked - get the RSS Random Key
 360  * @hw: pointer to the HW structure
 361  * @rss_key: buffer to fill with RSS Hash Key contents.
 362  *
 363  * The "rss_key" buffer should be big enough to contain 10 registers.
 364  *
 365  * Returns: 0 on success.
 366  *          if API doesn't support this operation - (-EOPNOTSUPP).
 367  */
 368 int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
 369 {
 370         int err;
 371         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 372 
 373         /* We currently support the RSS Random Key retrieval for 82599 and x540
 374          * devices only.
 375          *
 376          * Thus return an error if API doesn't support RSS Random Key retrieval
 377          * or if the operation is not supported for this device type.
 378          */
 379         switch (hw->api_version) {
 380         case ixgbe_mbox_api_14:
 381         case ixgbe_mbox_api_13:
 382         case ixgbe_mbox_api_12:
 383                 if (hw->mac.type < ixgbe_mac_X550_vf)
 384                         break;
 385                 /* fall through */
 386         default:
 387                 return -EOPNOTSUPP;
 388         }
 389 
 390         msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
 391         err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
 392 
 393         if (err)
 394                 return err;
 395 
 396         err = hw->mbx.ops.read_posted(hw, msgbuf, 11);
 397 
 398         if (err)
 399                 return err;
 400 
 401         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 402 
 403         /* If the operation has been refused by a PF return -EPERM */
 404         if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_NACK))
 405                 return -EPERM;
 406 
 407         /* If we didn't get an ACK there must have been
 408          * some sort of mailbox error so we should treat it
 409          * as such.
 410          */
 411         if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK))
 412                 return IXGBE_ERR_MBX;
 413 
 414         memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
 415 
 416         return 0;
 417 }
 418 
 419 /**
 420  *  ixgbevf_set_rar_vf - set device MAC address
 421  *  @hw: pointer to hardware structure
 422  *  @index: Receive address register to write
 423  *  @addr: Address to put into receive address register
 424  *  @vmdq: Unused in this implementation
 425  **/
 426 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
 427                               u32 vmdq)
 428 {
 429         u32 msgbuf[3];
 430         u8 *msg_addr = (u8 *)(&msgbuf[1]);
 431         s32 ret_val;
 432 
 433         memset(msgbuf, 0, sizeof(msgbuf));
 434         msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
 435         ether_addr_copy(msg_addr, addr);
 436 
 437         ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
 438                                              ARRAY_SIZE(msgbuf));
 439         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 440 
 441         /* if nacked the address was rejected, use "perm_addr" */
 442         if (!ret_val &&
 443             (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) {
 444                 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
 445                 return IXGBE_ERR_MBX;
 446         }
 447 
 448         return ret_val;
 449 }
 450 
 451 /**
 452  *  ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
 453  *  @hw: pointer to hardware structure
 454  *  @index: Receive address register to write
 455  *  @addr: Address to put into receive address register
 456  *  @vmdq: Unused in this implementation
 457  *
 458  * We don't really allow setting the device MAC address. However,
 459  * if the address being set is the permanent MAC address we will
 460  * permit that.
 461  **/
 462 static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
 463                                  u32 vmdq)
 464 {
 465         if (ether_addr_equal(addr, hw->mac.perm_addr))
 466                 return 0;
 467 
 468         return -EOPNOTSUPP;
 469 }
 470 
 471 /**
 472  *  ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
 473  *  @hw: pointer to the HW structure
 474  *  @netdev: pointer to net device structure
 475  *
 476  *  Updates the Multicast Table Array.
 477  **/
 478 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
 479                                           struct net_device *netdev)
 480 {
 481         struct netdev_hw_addr *ha;
 482         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 483         u16 *vector_list = (u16 *)&msgbuf[1];
 484         u32 cnt, i;
 485 
 486         /* Each entry in the list uses 1 16 bit word.  We have 30
 487          * 16 bit words available in our HW msg buffer (minus 1 for the
 488          * msg type).  That's 30 hash values if we pack 'em right.  If
 489          * there are more than 30 MC addresses to add then punt the
 490          * extras for now and then add code to handle more than 30 later.
 491          * It would be unusual for a server to request that many multi-cast
 492          * addresses except for in large enterprise network environments.
 493          */
 494 
 495         cnt = netdev_mc_count(netdev);
 496         if (cnt > 30)
 497                 cnt = 30;
 498         msgbuf[0] = IXGBE_VF_SET_MULTICAST;
 499         msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
 500 
 501         i = 0;
 502         netdev_for_each_mc_addr(ha, netdev) {
 503                 if (i == cnt)
 504                         break;
 505                 if (is_link_local_ether_addr(ha->addr))
 506                         continue;
 507 
 508                 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
 509         }
 510 
 511         return ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
 512                         IXGBE_VFMAILBOX_SIZE);
 513 }
 514 
 515 /**
 516  * Hyper-V variant - just a stub.
 517  * @hw: unused
 518  * @netdev: unused
 519  */
 520 static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
 521                                              struct net_device *netdev)
 522 {
 523         return -EOPNOTSUPP;
 524 }
 525 
 526 /**
 527  *  ixgbevf_update_xcast_mode - Update Multicast mode
 528  *  @hw: pointer to the HW structure
 529  *  @xcast_mode: new multicast mode
 530  *
 531  *  Updates the Multicast Mode of VF.
 532  **/
 533 static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
 534 {
 535         u32 msgbuf[2];
 536         s32 err;
 537 
 538         switch (hw->api_version) {
 539         case ixgbe_mbox_api_12:
 540                 /* promisc introduced in 1.3 version */
 541                 if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
 542                         return -EOPNOTSUPP;
 543                 /* Fall threw */
 544         case ixgbe_mbox_api_14:
 545         case ixgbe_mbox_api_13:
 546                 break;
 547         default:
 548                 return -EOPNOTSUPP;
 549         }
 550 
 551         msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
 552         msgbuf[1] = xcast_mode;
 553 
 554         err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
 555                                          ARRAY_SIZE(msgbuf));
 556         if (err)
 557                 return err;
 558 
 559         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 560         if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_NACK))
 561                 return -EPERM;
 562 
 563         return 0;
 564 }
 565 
 566 /**
 567  * Hyper-V variant - just a stub.
 568  * @hw: unused
 569  * @xcast_mode: unused
 570  */
 571 static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
 572 {
 573         return -EOPNOTSUPP;
 574 }
 575 
 576 /**
 577  *  ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
 578  *  @hw: pointer to the HW structure
 579  *  @vlan: 12 bit VLAN ID
 580  *  @vind: unused by VF drivers
 581  *  @vlan_on: if true then set bit, else clear bit
 582  **/
 583 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
 584                                bool vlan_on)
 585 {
 586         u32 msgbuf[2];
 587         s32 err;
 588 
 589         msgbuf[0] = IXGBE_VF_SET_VLAN;
 590         msgbuf[1] = vlan;
 591         /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
 592         msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
 593 
 594         err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
 595                                          ARRAY_SIZE(msgbuf));
 596         if (err)
 597                 goto mbx_err;
 598 
 599         /* remove extra bits from the message */
 600         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 601         msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
 602 
 603         if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK))
 604                 err = IXGBE_ERR_INVALID_ARGUMENT;
 605 
 606 mbx_err:
 607         return err;
 608 }
 609 
 610 /**
 611  * Hyper-V variant - just a stub.
 612  * @hw: unused
 613  * @vlan: unused
 614  * @vind: unused
 615  * @vlan_on: unused
 616  */
 617 static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
 618                                   bool vlan_on)
 619 {
 620         return -EOPNOTSUPP;
 621 }
 622 
 623 /**
 624  *  ixgbevf_setup_mac_link_vf - Setup MAC link settings
 625  *  @hw: pointer to hardware structure
 626  *  @speed: Unused in this implementation
 627  *  @autoneg: Unused in this implementation
 628  *  @autoneg_wait_to_complete: Unused in this implementation
 629  *
 630  *  Do nothing and return success.  VF drivers are not allowed to change
 631  *  global settings.  Maintained for driver compatibility.
 632  **/
 633 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
 634                                      ixgbe_link_speed speed, bool autoneg,
 635                                      bool autoneg_wait_to_complete)
 636 {
 637         return 0;
 638 }
 639 
 640 /**
 641  *  ixgbevf_check_mac_link_vf - Get link/speed status
 642  *  @hw: pointer to hardware structure
 643  *  @speed: pointer to link speed
 644  *  @link_up: true is link is up, false otherwise
 645  *  @autoneg_wait_to_complete: unused
 646  *
 647  *  Reads the links register to determine if link is up and the current speed
 648  **/
 649 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 650                                      ixgbe_link_speed *speed,
 651                                      bool *link_up,
 652                                      bool autoneg_wait_to_complete)
 653 {
 654         struct ixgbe_mbx_info *mbx = &hw->mbx;
 655         struct ixgbe_mac_info *mac = &hw->mac;
 656         s32 ret_val = 0;
 657         u32 links_reg;
 658         u32 in_msg = 0;
 659 
 660         /* If we were hit with a reset drop the link */
 661         if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
 662                 mac->get_link_status = true;
 663 
 664         if (!mac->get_link_status)
 665                 goto out;
 666 
 667         /* if link status is down no point in checking to see if pf is up */
 668         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 669         if (!(links_reg & IXGBE_LINKS_UP))
 670                 goto out;
 671 
 672         /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
 673          * before the link status is correct
 674          */
 675         if (mac->type == ixgbe_mac_82599_vf) {
 676                 int i;
 677 
 678                 for (i = 0; i < 5; i++) {
 679                         udelay(100);
 680                         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 681 
 682                         if (!(links_reg & IXGBE_LINKS_UP))
 683                                 goto out;
 684                 }
 685         }
 686 
 687         switch (links_reg & IXGBE_LINKS_SPEED_82599) {
 688         case IXGBE_LINKS_SPEED_10G_82599:
 689                 *speed = IXGBE_LINK_SPEED_10GB_FULL;
 690                 break;
 691         case IXGBE_LINKS_SPEED_1G_82599:
 692                 *speed = IXGBE_LINK_SPEED_1GB_FULL;
 693                 break;
 694         case IXGBE_LINKS_SPEED_100_82599:
 695                 *speed = IXGBE_LINK_SPEED_100_FULL;
 696                 break;
 697         }
 698 
 699         /* if the read failed it could just be a mailbox collision, best wait
 700          * until we are called again and don't report an error
 701          */
 702         if (mbx->ops.read(hw, &in_msg, 1))
 703                 goto out;
 704 
 705         if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
 706                 /* msg is not CTS and is NACK we must have lost CTS status */
 707                 if (in_msg & IXGBE_VT_MSGTYPE_NACK)
 708                         ret_val = -1;
 709                 goto out;
 710         }
 711 
 712         /* the pf is talking, if we timed out in the past we reinit */
 713         if (!mbx->timeout) {
 714                 ret_val = -1;
 715                 goto out;
 716         }
 717 
 718         /* if we passed all the tests above then the link is up and we no
 719          * longer need to check for link
 720          */
 721         mac->get_link_status = false;
 722 
 723 out:
 724         *link_up = !mac->get_link_status;
 725         return ret_val;
 726 }
 727 
 728 /**
 729  * Hyper-V variant; there is no mailbox communication.
 730  * @hw: pointer to private hardware struct
 731  * @speed: pointer to link speed
 732  * @link_up: true is link is up, false otherwise
 733  * @autoneg_wait_to_complete: unused
 734  */
 735 static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
 736                                         ixgbe_link_speed *speed,
 737                                         bool *link_up,
 738                                         bool autoneg_wait_to_complete)
 739 {
 740         struct ixgbe_mbx_info *mbx = &hw->mbx;
 741         struct ixgbe_mac_info *mac = &hw->mac;
 742         u32 links_reg;
 743 
 744         /* If we were hit with a reset drop the link */
 745         if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
 746                 mac->get_link_status = true;
 747 
 748         if (!mac->get_link_status)
 749                 goto out;
 750 
 751         /* if link status is down no point in checking to see if pf is up */
 752         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 753         if (!(links_reg & IXGBE_LINKS_UP))
 754                 goto out;
 755 
 756         /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
 757          * before the link status is correct
 758          */
 759         if (mac->type == ixgbe_mac_82599_vf) {
 760                 int i;
 761 
 762                 for (i = 0; i < 5; i++) {
 763                         udelay(100);
 764                         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 765 
 766                         if (!(links_reg & IXGBE_LINKS_UP))
 767                                 goto out;
 768                 }
 769         }
 770 
 771         switch (links_reg & IXGBE_LINKS_SPEED_82599) {
 772         case IXGBE_LINKS_SPEED_10G_82599:
 773                 *speed = IXGBE_LINK_SPEED_10GB_FULL;
 774                 break;
 775         case IXGBE_LINKS_SPEED_1G_82599:
 776                 *speed = IXGBE_LINK_SPEED_1GB_FULL;
 777                 break;
 778         case IXGBE_LINKS_SPEED_100_82599:
 779                 *speed = IXGBE_LINK_SPEED_100_FULL;
 780                 break;
 781         }
 782 
 783         /* if we passed all the tests above then the link is up and we no
 784          * longer need to check for link
 785          */
 786         mac->get_link_status = false;
 787 
 788 out:
 789         *link_up = !mac->get_link_status;
 790         return 0;
 791 }
 792 
 793 /**
 794  *  ixgbevf_set_rlpml_vf - Set the maximum receive packet length
 795  *  @hw: pointer to the HW structure
 796  *  @max_size: value to assign to max frame size
 797  **/
 798 static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
 799 {
 800         u32 msgbuf[2];
 801         s32 ret_val;
 802 
 803         msgbuf[0] = IXGBE_VF_SET_LPE;
 804         msgbuf[1] = max_size;
 805 
 806         ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
 807                                              ARRAY_SIZE(msgbuf));
 808         if (ret_val)
 809                 return ret_val;
 810         if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
 811             (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK))
 812                 return IXGBE_ERR_MBX;
 813 
 814         return 0;
 815 }
 816 
 817 /**
 818  * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
 819  * @hw: pointer to the HW structure
 820  * @max_size: value to assign to max frame size
 821  * Hyper-V variant.
 822  **/
 823 static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
 824 {
 825         u32 reg;
 826 
 827         /* If we are on Hyper-V, we implement this functionality
 828          * differently.
 829          */
 830         reg =  IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
 831         /* CRC == 4 */
 832         reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
 833         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
 834 
 835         return 0;
 836 }
 837 
 838 /**
 839  *  ixgbevf_negotiate_api_version_vf - Negotiate supported API version
 840  *  @hw: pointer to the HW structure
 841  *  @api: integer containing requested API version
 842  **/
 843 static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
 844 {
 845         int err;
 846         u32 msg[3];
 847 
 848         /* Negotiate the mailbox API version */
 849         msg[0] = IXGBE_VF_API_NEGOTIATE;
 850         msg[1] = api;
 851         msg[2] = 0;
 852 
 853         err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
 854         if (!err) {
 855                 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 856 
 857                 /* Store value and return 0 on success */
 858                 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) {
 859                         hw->api_version = api;
 860                         return 0;
 861                 }
 862 
 863                 err = IXGBE_ERR_INVALID_ARGUMENT;
 864         }
 865 
 866         return err;
 867 }
 868 
 869 /**
 870  *  ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
 871  *  @hw: pointer to the HW structure
 872  *  @api: integer containing requested API version
 873  *  Hyper-V version - only ixgbe_mbox_api_10 supported.
 874  **/
 875 static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
 876 {
 877         /* Hyper-V only supports api version ixgbe_mbox_api_10 */
 878         if (api != ixgbe_mbox_api_10)
 879                 return IXGBE_ERR_INVALID_ARGUMENT;
 880 
 881         return 0;
 882 }
 883 
 884 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
 885                        unsigned int *default_tc)
 886 {
 887         int err;
 888         u32 msg[5];
 889 
 890         /* do nothing if API doesn't support ixgbevf_get_queues */
 891         switch (hw->api_version) {
 892         case ixgbe_mbox_api_11:
 893         case ixgbe_mbox_api_12:
 894         case ixgbe_mbox_api_13:
 895         case ixgbe_mbox_api_14:
 896                 break;
 897         default:
 898                 return 0;
 899         }
 900 
 901         /* Fetch queue configuration from the PF */
 902         msg[0] = IXGBE_VF_GET_QUEUE;
 903         msg[1] = msg[2] = msg[3] = msg[4] = 0;
 904 
 905         err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
 906         if (!err) {
 907                 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 908 
 909                 /* if we we didn't get an ACK there must have been
 910                  * some sort of mailbox error so we should treat it
 911                  * as such
 912                  */
 913                 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK))
 914                         return IXGBE_ERR_MBX;
 915 
 916                 /* record and validate values from message */
 917                 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
 918                 if (hw->mac.max_tx_queues == 0 ||
 919                     hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
 920                         hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
 921 
 922                 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
 923                 if (hw->mac.max_rx_queues == 0 ||
 924                     hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
 925                         hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
 926 
 927                 *num_tcs = msg[IXGBE_VF_TRANS_VLAN];
 928                 /* in case of unknown state assume we cannot tag frames */
 929                 if (*num_tcs > hw->mac.max_rx_queues)
 930                         *num_tcs = 1;
 931 
 932                 *default_tc = msg[IXGBE_VF_DEF_QUEUE];
 933                 /* default to queue 0 on out-of-bounds queue number */
 934                 if (*default_tc >= hw->mac.max_tx_queues)
 935                         *default_tc = 0;
 936         }
 937 
 938         return err;
 939 }
 940 
 941 static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
 942         .init_hw                = ixgbevf_init_hw_vf,
 943         .reset_hw               = ixgbevf_reset_hw_vf,
 944         .start_hw               = ixgbevf_start_hw_vf,
 945         .get_mac_addr           = ixgbevf_get_mac_addr_vf,
 946         .stop_adapter           = ixgbevf_stop_hw_vf,
 947         .setup_link             = ixgbevf_setup_mac_link_vf,
 948         .check_link             = ixgbevf_check_mac_link_vf,
 949         .negotiate_api_version  = ixgbevf_negotiate_api_version_vf,
 950         .set_rar                = ixgbevf_set_rar_vf,
 951         .update_mc_addr_list    = ixgbevf_update_mc_addr_list_vf,
 952         .update_xcast_mode      = ixgbevf_update_xcast_mode,
 953         .set_uc_addr            = ixgbevf_set_uc_addr_vf,
 954         .set_vfta               = ixgbevf_set_vfta_vf,
 955         .set_rlpml              = ixgbevf_set_rlpml_vf,
 956 };
 957 
 958 static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
 959         .init_hw                = ixgbevf_init_hw_vf,
 960         .reset_hw               = ixgbevf_hv_reset_hw_vf,
 961         .start_hw               = ixgbevf_start_hw_vf,
 962         .get_mac_addr           = ixgbevf_get_mac_addr_vf,
 963         .stop_adapter           = ixgbevf_stop_hw_vf,
 964         .setup_link             = ixgbevf_setup_mac_link_vf,
 965         .check_link             = ixgbevf_hv_check_mac_link_vf,
 966         .negotiate_api_version  = ixgbevf_hv_negotiate_api_version_vf,
 967         .set_rar                = ixgbevf_hv_set_rar_vf,
 968         .update_mc_addr_list    = ixgbevf_hv_update_mc_addr_list_vf,
 969         .update_xcast_mode      = ixgbevf_hv_update_xcast_mode,
 970         .set_uc_addr            = ixgbevf_hv_set_uc_addr_vf,
 971         .set_vfta               = ixgbevf_hv_set_vfta_vf,
 972         .set_rlpml              = ixgbevf_hv_set_rlpml_vf,
 973 };
 974 
 975 const struct ixgbevf_info ixgbevf_82599_vf_info = {
 976         .mac = ixgbe_mac_82599_vf,
 977         .mac_ops = &ixgbevf_mac_ops,
 978 };
 979 
 980 const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
 981         .mac = ixgbe_mac_82599_vf,
 982         .mac_ops = &ixgbevf_hv_mac_ops,
 983 };
 984 
 985 const struct ixgbevf_info ixgbevf_X540_vf_info = {
 986         .mac = ixgbe_mac_X540_vf,
 987         .mac_ops = &ixgbevf_mac_ops,
 988 };
 989 
 990 const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
 991         .mac = ixgbe_mac_X540_vf,
 992         .mac_ops = &ixgbevf_hv_mac_ops,
 993 };
 994 
 995 const struct ixgbevf_info ixgbevf_X550_vf_info = {
 996         .mac = ixgbe_mac_X550_vf,
 997         .mac_ops = &ixgbevf_mac_ops,
 998 };
 999 
1000 const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
1001         .mac = ixgbe_mac_X550_vf,
1002         .mac_ops = &ixgbevf_hv_mac_ops,
1003 };
1004 
1005 const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
1006         .mac = ixgbe_mac_X550EM_x_vf,
1007         .mac_ops = &ixgbevf_mac_ops,
1008 };
1009 
1010 const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
1011         .mac = ixgbe_mac_X550EM_x_vf,
1012         .mac_ops = &ixgbevf_hv_mac_ops,
1013 };
1014 
1015 const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
1016         .mac = ixgbe_mac_x550em_a_vf,
1017         .mac_ops = &ixgbevf_mac_ops,
1018 };