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

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2015 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, see <http://www.gnu.org/licenses/>.
  17
  18   The full GNU General Public License is included in this distribution in
  19   the file called "COPYING".
  20
  21   Contact Information:
  22   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24
  25 *******************************************************************************/
  26
  27 #include "vf.h"
  28 #include "ixgbevf.h"
  29
  30 /**
  31  *  ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
  32  *  @hw: pointer to hardware structure
  33  *
  34  *  Starts the hardware by filling the bus info structure and media type, clears
  35  *  all on chip counters, initializes receive address registers, multicast
  36  *  table, VLAN filter table, calls routine to set up link and flow control
  37  *  settings, and leaves transmit and receive units disabled and uninitialized
  38  **/
  39 static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
  40 {
  41         /* Clear adapter stopped flag */
  42         hw->adapter_stopped = false;
  43
  44         return 0;
  45 }
  46
  47 /**
  48  *  ixgbevf_init_hw_vf - virtual function hardware initialization
  49  *  @hw: pointer to hardware structure
  50  *
  51  *  Initialize the hardware by resetting the hardware and then starting
  52  *  the hardware
  53  **/
  54 static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
  55 {
  56         s32 status = hw->mac.ops.start_hw(hw);
  57
  58         hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
  59
  60         return status;
  61 }
  62
  63 /**
  64  *  ixgbevf_reset_hw_vf - Performs hardware reset
  65  *  @hw: pointer to hardware structure
  66  *
  67  *  Resets the hardware by resetting the transmit and receive units, masks and
  68  *  clears all interrupts.
  69  **/
  70 static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
  71 {
  72         struct ixgbe_mbx_info *mbx = &hw->mbx;
  73         u32 timeout = IXGBE_VF_INIT_TIMEOUT;
  74         s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
  75         u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
  76         u8 *addr = (u8 *)(&msgbuf[1]);
  77
  78         /* Call adapter stop to disable tx/rx and clear interrupts */
  79         hw->mac.ops.stop_adapter(hw);
  80
  81         /* reset the api version */
  82         hw->api_version = ixgbe_mbox_api_10;
  83
  84         IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
  85         IXGBE_WRITE_FLUSH(hw);
  86
  87         /* we cannot reset while the RSTI / RSTD bits are asserted */
  88         while (!mbx->ops.check_for_rst(hw) && timeout) {
  89                 timeout--;
  90                 udelay(5);
  91         }
  92
  93         if (!timeout)
  94                 return IXGBE_ERR_RESET_FAILED;
  95
  96         /* mailbox timeout can now become active */
  97         mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
  98
  99         msgbuf[0] = IXGBE_VF_RESET;
 100         mbx->ops.write_posted(hw, msgbuf, 1);
 101
 102         mdelay(10);
 103
 104         /* set our "perm_addr" based on info provided by PF
 105          * also set up the mc_filter_type which is piggy backed
 106          * on the mac address in word 3
 107          */
 108         ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
 109         if (ret_val)
 110                 return ret_val;
 111
 112         /* New versions of the PF may NACK the reset return message
 113          * to indicate that no MAC address has yet been assigned for
 114          * the VF.
 115          */
 116         if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK) &&
 117             msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_NACK))
 118                 return IXGBE_ERR_INVALID_MAC_ADDR;
 119
 120         if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
 121                 ether_addr_copy(hw->mac.perm_addr, addr);
 122
 123         hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
 124
 125         return 0;
 126 }
 127
 128 /**
 129  *  ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
 130  *  @hw: pointer to hardware structure
 131  *
 132  *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
 133  *  disables transmit and receive units. The adapter_stopped flag is used by
 134  *  the shared code and drivers to determine if the adapter is in a stopped
 135  *  state and should not touch the hardware.
 136  **/
 137 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
 138 {
 139         u32 number_of_queues;
 140         u32 reg_val;
 141         u16 i;
 142
 143         /* Set the adapter_stopped flag so other driver functions stop touching
 144          * the hardware
 145          */
 146         hw->adapter_stopped = true;
 147
 148         /* Disable the receive unit by stopped each queue */
 149         number_of_queues = hw->mac.max_rx_queues;
 150         for (i = 0; i < number_of_queues; i++) {
 151                 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
 152                 if (reg_val & IXGBE_RXDCTL_ENABLE) {
 153                         reg_val &= ~IXGBE_RXDCTL_ENABLE;
 154                         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
 155                 }
 156         }
 157
 158         IXGBE_WRITE_FLUSH(hw);
 159
 160         /* Clear interrupt mask to stop from interrupts being generated */
 161         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
 162
 163         /* Clear any pending interrupts */
 164         IXGBE_READ_REG(hw, IXGBE_VTEICR);
 165
 166         /* Disable the transmit unit.  Each queue must be disabled. */
 167         number_of_queues = hw->mac.max_tx_queues;
 168         for (i = 0; i < number_of_queues; i++) {
 169                 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
 170                 if (reg_val & IXGBE_TXDCTL_ENABLE) {
 171                         reg_val &= ~IXGBE_TXDCTL_ENABLE;
 172                         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
 173                 }
 174         }
 175
 176         return 0;
 177 }
 178
 179 /**
 180  *  ixgbevf_mta_vector - Determines bit-vector in multicast table to set
 181  *  @hw: pointer to hardware structure
 182  *  @mc_addr: the multicast address
 183  *
 184  *  Extracts the 12 bits, from a multicast address, to determine which
 185  *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
 186  *  incoming Rx multicast addresses, to determine the bit-vector to check in
 187  *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
 188  *  by the MO field of the MCSTCTRL. The MO field is set during initialization
 189  *  to mc_filter_type.
 190  **/
 191 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
 192 {
 193         u32 vector = 0;
 194
 195         switch (hw->mac.mc_filter_type) {
 196         case 0:   /* use bits [47:36] of the address */
 197                 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
 198                 break;
 199         case 1:   /* use bits [46:35] of the address */
 200                 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
 201                 break;
 202         case 2:   /* use bits [45:34] of the address */
 203                 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
 204                 break;
 205         case 3:   /* use bits [43:32] of the address */
 206                 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
 207                 break;
 208         default:  /* Invalid mc_filter_type */
 209                 break;
 210         }
 211
 212         /* vector can only be 12-bits or boundary will be exceeded */
 213         vector &= 0xFFF;
 214         return vector;
 215 }
 216
 217 /**
 218  *  ixgbevf_get_mac_addr_vf - Read device MAC address
 219  *  @hw: pointer to the HW structure
 220  *  @mac_addr: pointer to storage for retrieved MAC address
 221  **/
 222 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
 223 {
 224         ether_addr_copy(mac_addr, hw->mac.perm_addr);
 225
 226         return 0;
 227 }
 228
 229 static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
 230 {
 231         struct ixgbe_mbx_info *mbx = &hw->mbx;
 232         u32 msgbuf[3];
 233         u8 *msg_addr = (u8 *)(&msgbuf[1]);
 234         s32 ret_val;
 235
 236         memset(msgbuf, 0, sizeof(msgbuf));
 237         /* If index is one then this is the start of a new list and needs
 238          * indication to the PF so it can do it's own list management.
 239          * If it is zero then that tells the PF to just clear all of
 240          * this VF's macvlans and there is no new list.
 241          */
 242         msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
 243         msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
 244         if (addr)
 245                 ether_addr_copy(msg_addr, addr);
 246         ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
 247
 248         if (!ret_val)
 249                 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
 250
 251         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 252
 253         if (!ret_val)
 254                 if (msgbuf[0] ==
 255                     (IXGBE_VF_SET_MACVLAN | IXGBE_VT_MSGTYPE_NACK))
 256                         ret_val = -ENOMEM;
 257
 258         return ret_val;
 259 }
 260
 261 /**
 262  * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
 263  * @adapter: pointer to the port handle
 264  * @reta: buffer to fill with RETA contents.
 265  * @num_rx_queues: Number of Rx queues configured for this port
 266  *
 267  * The "reta" buffer should be big enough to contain 32 registers.
 268  *
 269  * Returns: 0 on success.
 270  *          if API doesn't support this operation - (-EOPNOTSUPP).
 271  */
 272 int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
 273 {
 274         int err, i, j;
 275         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 276         u32 *hw_reta = &msgbuf[1];
 277         u32 mask = 0;
 278
 279         /* We have to use a mailbox for 82599 and x540 devices only.
 280          * For these devices RETA has 128 entries.
 281          * Also these VFs support up to 4 RSS queues. Therefore PF will compress
 282          * 16 RETA entries in each DWORD giving 2 bits to each entry.
 283          */
 284         int dwords = IXGBEVF_82599_RETA_SIZE / 16;
 285
 286         /* We support the RSS querying for 82599 and x540 devices only.
 287          * Thus return an error if API doesn't support RETA querying or querying
 288          * is not supported for this device type.
 289          */
 290         if (hw->api_version != ixgbe_mbox_api_12 ||
 291             hw->mac.type >= ixgbe_mac_X550_vf)
 292                 return -EOPNOTSUPP;
 293
 294         msgbuf[0] = IXGBE_VF_GET_RETA;
 295
 296         err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
 297
 298         if (err)
 299                 return err;
 300
 301         err = hw->mbx.ops.read_posted(hw, msgbuf, dwords + 1);
 302
 303         if (err)
 304                 return err;
 305
 306         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 307
 308         /* If the operation has been refused by a PF return -EPERM */
 309         if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
 310                 return -EPERM;
 311
 312         /* If we didn't get an ACK there must have been
 313          * some sort of mailbox error so we should treat it
 314          * as such.
 315          */
 316         if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
 317                 return IXGBE_ERR_MBX;
 318
 319         /* ixgbevf doesn't support more than 2 queues at the moment */
 320         if (num_rx_queues > 1)
 321                 mask = 0x1;
 322
 323         for (i = 0; i < dwords; i++)
 324                 for (j = 0; j < 16; j++)
 325                         reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
 326
 327         return 0;
 328 }
 329
 330 /**
 331  * ixgbevf_get_rss_key_locked - get the RSS Random Key
 332  * @hw: pointer to the HW structure
 333  * @rss_key: buffer to fill with RSS Hash Key contents.
 334  *
 335  * The "rss_key" buffer should be big enough to contain 10 registers.
 336  *
 337  * Returns: 0 on success.
 338  *          if API doesn't support this operation - (-EOPNOTSUPP).
 339  */
 340 int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
 341 {
 342         int err;
 343         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 344
 345         /* We currently support the RSS Random Key retrieval for 82599 and x540
 346          * devices only.
 347          *
 348          * Thus return an error if API doesn't support RSS Random Key retrieval
 349          * or if the operation is not supported for this device type.
 350          */
 351         if (hw->api_version != ixgbe_mbox_api_12 ||
 352             hw->mac.type >= ixgbe_mac_X550_vf)
 353                 return -EOPNOTSUPP;
 354
 355         msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
 356         err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
 357
 358         if (err)
 359                 return err;
 360
 361         err = hw->mbx.ops.read_posted(hw, msgbuf, 11);
 362
 363         if (err)
 364                 return err;
 365
 366         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 367
 368         /* If the operation has been refused by a PF return -EPERM */
 369         if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
 370                 return -EPERM;
 371
 372         /* If we didn't get an ACK there must have been
 373          * some sort of mailbox error so we should treat it
 374          * as such.
 375          */
 376         if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK))
 377                 return IXGBE_ERR_MBX;
 378
 379         memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
 380
 381         return 0;
 382 }
 383
 384 /**
 385  *  ixgbevf_set_rar_vf - set device MAC address
 386  *  @hw: pointer to hardware structure
 387  *  @index: Receive address register to write
 388  *  @addr: Address to put into receive address register
 389  *  @vmdq: Unused in this implementation
 390  **/
 391 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
 392                               u32 vmdq)
 393 {
 394         struct ixgbe_mbx_info *mbx = &hw->mbx;
 395         u32 msgbuf[3];
 396         u8 *msg_addr = (u8 *)(&msgbuf[1]);
 397         s32 ret_val;
 398
 399         memset(msgbuf, 0, sizeof(msgbuf));
 400         msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
 401         ether_addr_copy(msg_addr, addr);
 402         ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
 403
 404         if (!ret_val)
 405                 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
 406
 407         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 408
 409         /* if nacked the address was rejected, use "perm_addr" */
 410         if (!ret_val &&
 411             (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) {
 412                 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
 413                 return IXGBE_ERR_MBX;
 414         }
 415
 416         return ret_val;
 417 }
 418
 419 static void ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw,
 420                                        u32 *msg, u16 size)
 421 {
 422         struct ixgbe_mbx_info *mbx = &hw->mbx;
 423         u32 retmsg[IXGBE_VFMAILBOX_SIZE];
 424         s32 retval = mbx->ops.write_posted(hw, msg, size);
 425
 426         if (!retval)
 427                 mbx->ops.read_posted(hw, retmsg, size);
 428 }
 429
 430 /**
 431  *  ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
 432  *  @hw: pointer to the HW structure
 433  *  @netdev: pointer to net device structure
 434  *
 435  *  Updates the Multicast Table Array.
 436  **/
 437 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
 438                                           struct net_device *netdev)
 439 {
 440         struct netdev_hw_addr *ha;
 441         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 442         u16 *vector_list = (u16 *)&msgbuf[1];
 443         u32 cnt, i;
 444
 445         /* Each entry in the list uses 1 16 bit word.  We have 30
 446          * 16 bit words available in our HW msg buffer (minus 1 for the
 447          * msg type).  That's 30 hash values if we pack 'em right.  If
 448          * there are more than 30 MC addresses to add then punt the
 449          * extras for now and then add code to handle more than 30 later.
 450          * It would be unusual for a server to request that many multi-cast
 451          * addresses except for in large enterprise network environments.
 452          */
 453
 454         cnt = netdev_mc_count(netdev);
 455         if (cnt > 30)
 456                 cnt = 30;
 457         msgbuf[0] = IXGBE_VF_SET_MULTICAST;
 458         msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
 459
 460         i = 0;
 461         netdev_for_each_mc_addr(ha, netdev) {
 462                 if (i == cnt)
 463                         break;
 464                 if (is_link_local_ether_addr(ha->addr))
 465                         continue;
 466
 467                 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
 468         }
 469
 470         ixgbevf_write_msg_read_ack(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
 471
 472         return 0;
 473 }
 474
 475 /**
 476  *  ixgbevf_update_xcast_mode - Update Multicast mode
 477  *  @hw: pointer to the HW structure
 478  *  @netdev: pointer to net device structure
 479  *  @xcast_mode: new multicast mode
 480  *
 481  *  Updates the Multicast Mode of VF.
 482  **/
 483 static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw,
 484                                      struct net_device *netdev, int xcast_mode)
 485 {
 486         struct ixgbe_mbx_info *mbx = &hw->mbx;
 487         u32 msgbuf[2];
 488         s32 err;
 489
 490         switch (hw->api_version) {
 491         case ixgbe_mbox_api_12:
 492                 break;
 493         default:
 494                 return -EOPNOTSUPP;
 495         }
 496
 497         msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
 498         msgbuf[1] = xcast_mode;
 499
 500         err = mbx->ops.write_posted(hw, msgbuf, 2);
 501         if (err)
 502                 return err;
 503
 504         err = mbx->ops.read_posted(hw, msgbuf, 2);
 505         if (err)
 506                 return err;
 507
 508         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 509         if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_NACK))
 510                 return -EPERM;
 511
 512         return 0;
 513 }
 514
 515 /**
 516  *  ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
 517  *  @hw: pointer to the HW structure
 518  *  @vlan: 12 bit VLAN ID
 519  *  @vind: unused by VF drivers
 520  *  @vlan_on: if true then set bit, else clear bit
 521  **/
 522 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
 523                                bool vlan_on)
 524 {
 525         struct ixgbe_mbx_info *mbx = &hw->mbx;
 526         u32 msgbuf[2];
 527         s32 err;
 528
 529         msgbuf[0] = IXGBE_VF_SET_VLAN;
 530         msgbuf[1] = vlan;
 531         /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
 532         msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
 533
 534         err = mbx->ops.write_posted(hw, msgbuf, 2);
 535         if (err)
 536                 goto mbx_err;
 537
 538         err = mbx->ops.read_posted(hw, msgbuf, 2);
 539         if (err)
 540                 goto mbx_err;
 541
 542         /* remove extra bits from the message */
 543         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 544         msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
 545
 546         if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK))
 547                 err = IXGBE_ERR_INVALID_ARGUMENT;
 548
 549 mbx_err:
 550         return err;
 551 }
 552
 553 /**
 554  *  ixgbevf_setup_mac_link_vf - Setup MAC link settings
 555  *  @hw: pointer to hardware structure
 556  *  @speed: Unused in this implementation
 557  *  @autoneg: Unused in this implementation
 558  *  @autoneg_wait_to_complete: Unused in this implementation
 559  *
 560  *  Do nothing and return success.  VF drivers are not allowed to change
 561  *  global settings.  Maintained for driver compatibility.
 562  **/
 563 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
 564                                      ixgbe_link_speed speed, bool autoneg,
 565                                      bool autoneg_wait_to_complete)
 566 {
 567         return 0;
 568 }
 569
 570 /**
 571  *  ixgbevf_check_mac_link_vf - Get link/speed status
 572  *  @hw: pointer to hardware structure
 573  *  @speed: pointer to link speed
 574  *  @link_up: true is link is up, false otherwise
 575  *  @autoneg_wait_to_complete: true when waiting for completion is needed
 576  *
 577  *  Reads the links register to determine if link is up and the current speed
 578  **/
 579 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 580                                      ixgbe_link_speed *speed,
 581                                      bool *link_up,
 582                                      bool autoneg_wait_to_complete)
 583 {
 584         struct ixgbe_mbx_info *mbx = &hw->mbx;
 585         struct ixgbe_mac_info *mac = &hw->mac;
 586         s32 ret_val = 0;
 587         u32 links_reg;
 588         u32 in_msg = 0;
 589
 590         /* If we were hit with a reset drop the link */
 591         if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
 592                 mac->get_link_status = true;
 593
 594         if (!mac->get_link_status)
 595                 goto out;
 596
 597         /* if link status is down no point in checking to see if pf is up */
 598         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 599         if (!(links_reg & IXGBE_LINKS_UP))
 600                 goto out;
 601
 602         /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
 603          * before the link status is correct
 604          */
 605         if (mac->type == ixgbe_mac_82599_vf) {
 606                 int i;
 607
 608                 for (i = 0; i < 5; i++) {
 609                         udelay(100);
 610                         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 611
 612                         if (!(links_reg & IXGBE_LINKS_UP))
 613                                 goto out;
 614                 }
 615         }
 616
 617         switch (links_reg & IXGBE_LINKS_SPEED_82599) {
 618         case IXGBE_LINKS_SPEED_10G_82599:
 619                 *speed = IXGBE_LINK_SPEED_10GB_FULL;
 620                 break;
 621         case IXGBE_LINKS_SPEED_1G_82599:
 622                 *speed = IXGBE_LINK_SPEED_1GB_FULL;
 623                 break;
 624         case IXGBE_LINKS_SPEED_100_82599:
 625                 *speed = IXGBE_LINK_SPEED_100_FULL;
 626                 break;
 627         }
 628
 629         /* if the read failed it could just be a mailbox collision, best wait
 630          * until we are called again and don't report an error
 631          */
 632         if (mbx->ops.read(hw, &in_msg, 1))
 633                 goto out;
 634
 635         if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
 636                 /* msg is not CTS and is NACK we must have lost CTS status */
 637                 if (in_msg & IXGBE_VT_MSGTYPE_NACK)
 638                         ret_val = -1;
 639                 goto out;
 640         }
 641
 642         /* the pf is talking, if we timed out in the past we reinit */
 643         if (!mbx->timeout) {
 644                 ret_val = -1;
 645                 goto out;
 646         }
 647
 648         /* if we passed all the tests above then the link is up and we no
 649          * longer need to check for link
 650          */
 651         mac->get_link_status = false;
 652
 653 out:
 654         *link_up = !mac->get_link_status;
 655         return ret_val;
 656 }
 657
 658 /**
 659  *  ixgbevf_rlpml_set_vf - Set the maximum receive packet length
 660  *  @hw: pointer to the HW structure
 661  *  @max_size: value to assign to max frame size
 662  **/
 663 void ixgbevf_rlpml_set_vf(struct ixgbe_hw *hw, u16 max_size)
 664 {
 665         u32 msgbuf[2];
 666
 667         msgbuf[0] = IXGBE_VF_SET_LPE;
 668         msgbuf[1] = max_size;
 669         ixgbevf_write_msg_read_ack(hw, msgbuf, 2);
 670 }
 671
 672 /**
 673  *  ixgbevf_negotiate_api_version - Negotiate supported API version
 674  *  @hw: pointer to the HW structure
 675  *  @api: integer containing requested API version
 676  **/
 677 int ixgbevf_negotiate_api_version(struct ixgbe_hw *hw, int api)
 678 {
 679         int err;
 680         u32 msg[3];
 681
 682         /* Negotiate the mailbox API version */
 683         msg[0] = IXGBE_VF_API_NEGOTIATE;
 684         msg[1] = api;
 685         msg[2] = 0;
 686         err = hw->mbx.ops.write_posted(hw, msg, 3);
 687
 688         if (!err)
 689                 err = hw->mbx.ops.read_posted(hw, msg, 3);
 690
 691         if (!err) {
 692                 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 693
 694                 /* Store value and return 0 on success */
 695                 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) {
 696                         hw->api_version = api;
 697                         return 0;
 698                 }
 699
 700                 err = IXGBE_ERR_INVALID_ARGUMENT;
 701         }
 702
 703         return err;
 704 }
 705
 706 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
 707                        unsigned int *default_tc)
 708 {
 709         int err;
 710         u32 msg[5];
 711
 712         /* do nothing if API doesn't support ixgbevf_get_queues */
 713         switch (hw->api_version) {
 714         case ixgbe_mbox_api_11:
 715         case ixgbe_mbox_api_12:
 716                 break;
 717         default:
 718                 return 0;
 719         }
 720
 721         /* Fetch queue configuration from the PF */
 722         msg[0] = IXGBE_VF_GET_QUEUE;
 723         msg[1] = msg[2] = msg[3] = msg[4] = 0;
 724         err = hw->mbx.ops.write_posted(hw, msg, 5);
 725
 726         if (!err)
 727                 err = hw->mbx.ops.read_posted(hw, msg, 5);
 728
 729         if (!err) {
 730                 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 731
 732                 /* if we we didn't get an ACK there must have been
 733                  * some sort of mailbox error so we should treat it
 734                  * as such
 735                  */
 736                 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK))
 737                         return IXGBE_ERR_MBX;
 738
 739                 /* record and validate values from message */
 740                 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
 741                 if (hw->mac.max_tx_queues == 0 ||
 742                     hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
 743                         hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
 744
 745                 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
 746                 if (hw->mac.max_rx_queues == 0 ||
 747                     hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
 748                         hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
 749
 750                 *num_tcs = msg[IXGBE_VF_TRANS_VLAN];
 751                 /* in case of unknown state assume we cannot tag frames */
 752                 if (*num_tcs > hw->mac.max_rx_queues)
 753                         *num_tcs = 1;
 754
 755                 *default_tc = msg[IXGBE_VF_DEF_QUEUE];
 756                 /* default to queue 0 on out-of-bounds queue number */
 757                 if (*default_tc >= hw->mac.max_tx_queues)
 758                         *default_tc = 0;
 759         }
 760
 761         return err;
 762 }
 763
 764 static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
 765         .init_hw                = ixgbevf_init_hw_vf,
 766         .reset_hw               = ixgbevf_reset_hw_vf,
 767         .start_hw               = ixgbevf_start_hw_vf,
 768         .get_mac_addr           = ixgbevf_get_mac_addr_vf,
 769         .stop_adapter           = ixgbevf_stop_hw_vf,
 770         .setup_link             = ixgbevf_setup_mac_link_vf,
 771         .check_link             = ixgbevf_check_mac_link_vf,
 772         .set_rar                = ixgbevf_set_rar_vf,
 773         .update_mc_addr_list    = ixgbevf_update_mc_addr_list_vf,
 774         .update_xcast_mode      = ixgbevf_update_xcast_mode,
 775         .set_uc_addr            = ixgbevf_set_uc_addr_vf,
 776         .set_vfta               = ixgbevf_set_vfta_vf,
 777 };
 778
 779 const struct ixgbevf_info ixgbevf_82599_vf_info = {
 780         .mac = ixgbe_mac_82599_vf,
 781         .mac_ops = &ixgbevf_mac_ops,
 782 };
 783
 784 const struct ixgbevf_info ixgbevf_X540_vf_info = {
 785         .mac = ixgbe_mac_X540_vf,
 786         .mac_ops = &ixgbevf_mac_ops,
 787 };
 788
 789 const struct ixgbevf_info ixgbevf_X550_vf_info = {
 790         .mac = ixgbe_mac_X550_vf,
 791         .mac_ops = &ixgbevf_mac_ops,
 792 };
 793
 794 const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
 795         .mac = ixgbe_mac_X550EM_x_vf,
 796         .mac_ops = &ixgbevf_mac_ops,
 797 };