usr/src/uts/common/io/e1000api/e1000_vf.c

   1 /******************************************************************************
   2
   3   Copyright (c) 2001-2011, Intel Corporation
   4   All rights reserved.
   5
   6   Redistribution and use in source and binary forms, with or without
   7   modification, are permitted provided that the following conditions are met:
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  10       this list of conditions and the following disclaimer.
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  13       notice, this list of conditions and the following disclaimer in the
  14       documentation and/or other materials provided with the distribution.
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  18       this software without specific prior written permission.
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  20   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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  23   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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  31
  32 ******************************************************************************/
  33 /*$FreeBSD$*/
  34
  35
  36 #include "e1000_api.h"
  37
  38
  39 static s32 e1000_init_phy_params_vf(struct e1000_hw *hw);
  40 static s32 e1000_init_nvm_params_vf(struct e1000_hw *hw);
  41 static void e1000_release_vf(struct e1000_hw *hw);
  42 static s32 e1000_acquire_vf(struct e1000_hw *hw);
  43 static s32 e1000_setup_link_vf(struct e1000_hw *hw);
  44 static s32 e1000_get_bus_info_pcie_vf(struct e1000_hw *hw);
  45 static s32 e1000_init_mac_params_vf(struct e1000_hw *hw);
  46 static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
  47 static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
  48                                      u16 *duplex);
  49 static s32 e1000_init_hw_vf(struct e1000_hw *hw);
  50 static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
  51 static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *, u32);
  52 static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
  53 static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
  54
  55 /**
  56  *  e1000_init_phy_params_vf - Inits PHY params
  57  *  @hw: pointer to the HW structure
  58  *
  59  *  Doesn't do much - there's no PHY available to the VF.
  60  **/
  61 static s32 e1000_init_phy_params_vf(struct e1000_hw *hw)
  62 {
  63         DEBUGFUNC("e1000_init_phy_params_vf");
  64         hw->phy.type = e1000_phy_vf;
  65         hw->phy.ops.acquire = e1000_acquire_vf;
  66         hw->phy.ops.release = e1000_release_vf;
  67
  68         return E1000_SUCCESS;
  69 }
  70
  71 /**
  72  *  e1000_init_nvm_params_vf - Inits NVM params
  73  *  @hw: pointer to the HW structure
  74  *
  75  *  Doesn't do much - there's no NVM available to the VF.
  76  **/
  77 static s32 e1000_init_nvm_params_vf(struct e1000_hw *hw)
  78 {
  79         DEBUGFUNC("e1000_init_nvm_params_vf");
  80         hw->nvm.type = e1000_nvm_none;
  81         hw->nvm.ops.acquire = e1000_acquire_vf;
  82         hw->nvm.ops.release = e1000_release_vf;
  83
  84         return E1000_SUCCESS;
  85 }
  86
  87 /**
  88  *  e1000_init_mac_params_vf - Inits MAC params
  89  *  @hw: pointer to the HW structure
  90  **/
  91 static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
  92 {
  93         struct e1000_mac_info *mac = &hw->mac;
  94
  95         DEBUGFUNC("e1000_init_mac_params_vf");
  96
  97         /* Set media type */
  98         /*
  99          * Virtual functions don't care what they're media type is as they
 100          * have no direct access to the PHY, or the media.  That is handled
 101          * by the physical function driver.
 102          */
 103         hw->phy.media_type = e1000_media_type_unknown;
 104
 105         /* No ASF features for the VF driver */
 106         mac->asf_firmware_present = FALSE;
 107         /* ARC subsystem not supported */
 108         mac->arc_subsystem_valid = FALSE;
 109         /* Disable adaptive IFS mode so the generic funcs don't do anything */
 110         mac->adaptive_ifs = FALSE;
 111         /* VF's have no MTA Registers - PF feature only */
 112         mac->mta_reg_count = 128;
 113         /* VF's have no access to RAR entries  */
 114         mac->rar_entry_count = 1;
 115
 116         /* Function pointers */
 117         /* link setup */
 118         mac->ops.setup_link = e1000_setup_link_vf;
 119         /* bus type/speed/width */
 120         mac->ops.get_bus_info = e1000_get_bus_info_pcie_vf;
 121         /* reset */
 122         mac->ops.reset_hw = e1000_reset_hw_vf;
 123         /* hw initialization */
 124         mac->ops.init_hw = e1000_init_hw_vf;
 125         /* check for link */
 126         mac->ops.check_for_link = e1000_check_for_link_vf;
 127         /* link info */
 128         mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
 129         /* multicast address update */
 130         mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
 131         /* set mac address */
 132         mac->ops.rar_set = e1000_rar_set_vf;
 133         /* read mac address */
 134         mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
 135
 136
 137         return E1000_SUCCESS;
 138 }
 139
 140 /**
 141  *  e1000_init_function_pointers_vf - Inits function pointers
 142  *  @hw: pointer to the HW structure
 143  **/
 144 void e1000_init_function_pointers_vf(struct e1000_hw *hw)
 145 {
 146         DEBUGFUNC("e1000_init_function_pointers_vf");
 147
 148         hw->mac.ops.init_params = e1000_init_mac_params_vf;
 149         hw->nvm.ops.init_params = e1000_init_nvm_params_vf;
 150         hw->phy.ops.init_params = e1000_init_phy_params_vf;
 151         hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
 152 }
 153
 154 /**
 155  *  e1000_acquire_vf - Acquire rights to access PHY or NVM.
 156  *  @hw: pointer to the HW structure
 157  *
 158  *  There is no PHY or NVM so we want all attempts to acquire these to fail.
 159  *  In addition, the MAC registers to access PHY/NVM don't exist so we don't
 160  *  even want any SW to attempt to use them.
 161  **/
 162 static s32 e1000_acquire_vf(struct e1000_hw *hw)
 163 {
 164         return -E1000_ERR_PHY;
 165 }
 166
 167 /**
 168  *  e1000_release_vf - Release PHY or NVM
 169  *  @hw: pointer to the HW structure
 170  *
 171  *  There is no PHY or NVM so we want all attempts to acquire these to fail.
 172  *  In addition, the MAC registers to access PHY/NVM don't exist so we don't
 173  *  even want any SW to attempt to use them.
 174  **/
 175 static void e1000_release_vf(struct e1000_hw *hw)
 176 {
 177         return;
 178 }
 179
 180 /**
 181  *  e1000_setup_link_vf - Sets up link.
 182  *  @hw: pointer to the HW structure
 183  *
 184  *  Virtual functions cannot change link.
 185  **/
 186 static s32 e1000_setup_link_vf(struct e1000_hw *hw)
 187 {
 188         DEBUGFUNC("e1000_setup_link_vf");
 189
 190         return E1000_SUCCESS;
 191 }
 192
 193 /**
 194  *  e1000_get_bus_info_pcie_vf - Gets the bus info.
 195  *  @hw: pointer to the HW structure
 196  *
 197  *  Virtual functions are not really on their own bus.
 198  **/
 199 static s32 e1000_get_bus_info_pcie_vf(struct e1000_hw *hw)
 200 {
 201         struct e1000_bus_info *bus = &hw->bus;
 202
 203         DEBUGFUNC("e1000_get_bus_info_pcie_vf");
 204
 205         /* Do not set type PCI-E because we don't want disable master to run */
 206         bus->type = e1000_bus_type_reserved;
 207         bus->speed = e1000_bus_speed_2500;
 208
 209         return 0;
 210 }
 211
 212 /**
 213  *  e1000_get_link_up_info_vf - Gets link info.
 214  *  @hw: pointer to the HW structure
 215  *  @speed: pointer to 16 bit value to store link speed.
 216  *  @duplex: pointer to 16 bit value to store duplex.
 217  *
 218  *  Since we cannot read the PHY and get accurate link info, we must rely upon
 219  *  the status register's data which is often stale and inaccurate.
 220  **/
 221 static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
 222                                      u16 *duplex)
 223 {
 224         s32 status;
 225
 226         DEBUGFUNC("e1000_get_link_up_info_vf");
 227
 228         status = E1000_READ_REG(hw, E1000_STATUS);
 229         if (status & E1000_STATUS_SPEED_1000) {
 230                 *speed = SPEED_1000;
 231                 DEBUGOUT("1000 Mbs, ");
 232         } else if (status & E1000_STATUS_SPEED_100) {
 233                 *speed = SPEED_100;
 234                 DEBUGOUT("100 Mbs, ");
 235         } else {
 236                 *speed = SPEED_10;
 237                 DEBUGOUT("10 Mbs, ");
 238         }
 239
 240         if (status & E1000_STATUS_FD) {
 241                 *duplex = FULL_DUPLEX;
 242                 DEBUGOUT("Full Duplex\n");
 243         } else {
 244                 *duplex = HALF_DUPLEX;
 245                 DEBUGOUT("Half Duplex\n");
 246         }
 247
 248         return E1000_SUCCESS;
 249 }
 250
 251 /**
 252  *  e1000_reset_hw_vf - Resets the HW
 253  *  @hw: pointer to the HW structure
 254  *
 255  *  VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
 256  *  This is all the reset we can perform on a VF.
 257  **/
 258 static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
 259 {
 260         struct e1000_mbx_info *mbx = &hw->mbx;
 261         u32 timeout = E1000_VF_INIT_TIMEOUT;
 262         s32 ret_val = -E1000_ERR_MAC_INIT;
 263         u32 ctrl, msgbuf[3];
 264         u8 *addr = (u8 *)(&msgbuf[1]);
 265
 266         DEBUGFUNC("e1000_reset_hw_vf");
 267
 268         DEBUGOUT("Issuing a function level reset to MAC\n");
 269         ctrl = E1000_READ_REG(hw, E1000_CTRL);
 270         E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_RST);
 271
 272         /* we cannot reset while the RSTI / RSTD bits are asserted */
 273         while (!mbx->ops.check_for_rst(hw, 0) && timeout) {
 274                 timeout--;
 275                 usec_delay(5);
 276         }
 277
 278         if (timeout) {
 279                 /* mailbox timeout can now become active */
 280                 mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
 281
 282                 msgbuf[0] = E1000_VF_RESET;
 283                 mbx->ops.write_posted(hw, msgbuf, 1, 0);
 284
 285                 msec_delay(10);
 286
 287                 /* set our "perm_addr" based on info provided by PF */
 288                 ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
 289                 if (!ret_val) {
 290                         if (msgbuf[0] == (E1000_VF_RESET |
 291                             E1000_VT_MSGTYPE_ACK))
 292                                 memcpy(hw->mac.perm_addr, addr, 6);
 293                         else
 294                                 ret_val = -E1000_ERR_MAC_INIT;
 295                 }
 296         }
 297
 298         return ret_val;
 299 }
 300
 301 /**
 302  *  e1000_init_hw_vf - Inits the HW
 303  *  @hw: pointer to the HW structure
 304  *
 305  *  Not much to do here except clear the PF Reset indication if there is one.
 306  **/
 307 static s32 e1000_init_hw_vf(struct e1000_hw *hw)
 308 {
 309         DEBUGFUNC("e1000_init_hw_vf");
 310
 311         /* attempt to set and restore our mac address */
 312         e1000_rar_set_vf(hw, hw->mac.addr, 0);
 313
 314         return E1000_SUCCESS;
 315 }
 316
 317 /**
 318  *  e1000_rar_set_vf - set device MAC address
 319  *  @hw: pointer to the HW structure
 320  *  @addr: pointer to the receive address
 321  *  @index receive address array register
 322  **/
 323 static void e1000_rar_set_vf(struct e1000_hw *hw, u8 * addr, u32 index)
 324 {
 325         struct e1000_mbx_info *mbx = &hw->mbx;
 326         u32 msgbuf[3];
 327         u8 *msg_addr = (u8 *)(&msgbuf[1]);
 328         s32 ret_val;
 329
 330         memset(msgbuf, 0, 12);
 331         msgbuf[0] = E1000_VF_SET_MAC_ADDR;
 332         memcpy(msg_addr, addr, 6);
 333         ret_val = mbx->ops.write_posted(hw, msgbuf, 3, 0);
 334
 335         if (!ret_val)
 336                 ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
 337
 338         msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
 339
 340         /* if nacked the address was rejected, use "perm_addr" */
 341         if (!ret_val &&
 342             (msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
 343                 e1000_read_mac_addr_vf(hw);
 344 }
 345
 346 /**
 347  *  e1000_hash_mc_addr_vf - Generate a multicast hash value
 348  *  @hw: pointer to the HW structure
 349  *  @mc_addr: pointer to a multicast address
 350  *
 351  *  Generates a multicast address hash value which is used to determine
 352  *  the multicast filter table array address and new table value.
 353  **/
 354 static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
 355 {
 356         u32 hash_value, hash_mask;
 357         u8 bit_shift = 0;
 358
 359         DEBUGFUNC("e1000_hash_mc_addr_generic");
 360
 361         /* Register count multiplied by bits per register */
 362         hash_mask = (hw->mac.mta_reg_count * 32) - 1;
 363
 364         /*
 365          * The bit_shift is the number of left-shifts
 366          * where 0xFF would still fall within the hash mask.
 367          */
 368         while (hash_mask >> bit_shift != 0xFF)
 369                 bit_shift++;
 370
 371         hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
 372                                   (((u16) mc_addr[5]) << bit_shift)));
 373
 374         return hash_value;
 375 }
 376
 377 static void e1000_write_msg_read_ack(struct e1000_hw *hw,
 378                                      u32 *msg, u16 size)
 379 {
 380         struct e1000_mbx_info *mbx = &hw->mbx;
 381         u32 retmsg[E1000_VFMAILBOX_SIZE];
 382         s32 retval = mbx->ops.write_posted(hw, msg, size, 0);
 383
 384         if (!retval)
 385                 mbx->ops.read_posted(hw, retmsg, E1000_VFMAILBOX_SIZE, 0);
 386 }
 387
 388 /**
 389  *  e1000_update_mc_addr_list_vf - Update Multicast addresses
 390  *  @hw: pointer to the HW structure
 391  *  @mc_addr_list: array of multicast addresses to program
 392  *  @mc_addr_count: number of multicast addresses to program
 393  *
 394  *  Updates the Multicast Table Array.
 395  *  The caller must have a packed mc_addr_list of multicast addresses.
 396  **/
 397 void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
 398                                   u8 *mc_addr_list, u32 mc_addr_count)
 399 {
 400         u32 msgbuf[E1000_VFMAILBOX_SIZE];
 401         u16 *hash_list = (u16 *)&msgbuf[1];
 402         u32 hash_value;
 403         u32 i;
 404
 405         DEBUGFUNC("e1000_update_mc_addr_list_vf");
 406
 407         /* Each entry in the list uses 1 16 bit word.  We have 30
 408          * 16 bit words available in our HW msg buffer (minus 1 for the
 409          * msg type).  That's 30 hash values if we pack 'em right.  If
 410          * there are more than 30 MC addresses to add then punt the
 411          * extras for now and then add code to handle more than 30 later.
 412          * It would be unusual for a server to request that many multi-cast
 413          * addresses except for in large enterprise network environments.
 414          */
 415
 416         DEBUGOUT1("MC Addr Count = %d\n", mc_addr_count);
 417
 418         if (mc_addr_count > 30) {
 419                 msgbuf[0] |= E1000_VF_SET_MULTICAST_OVERFLOW;
 420                 mc_addr_count = 30;
 421         }
 422
 423         msgbuf[0] = E1000_VF_SET_MULTICAST;
 424         msgbuf[0] |= mc_addr_count << E1000_VT_MSGINFO_SHIFT;
 425
 426         for (i = 0; i < mc_addr_count; i++) {
 427                 hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
 428                 DEBUGOUT1("Hash value = 0x%03X\n", hash_value);
 429                 hash_list[i] = hash_value & 0x0FFF;
 430                 mc_addr_list += ETH_ADDR_LEN;
 431         }
 432
 433         e1000_write_msg_read_ack(hw, msgbuf, E1000_VFMAILBOX_SIZE);
 434 }
 435
 436 /**
 437  *  e1000_vfta_set_vf - Set/Unset vlan filter table address
 438  *  @hw: pointer to the HW structure
 439  *  @vid: determines the vfta register and bit to set/unset
 440  *  @set: if TRUE then set bit, else clear bit
 441  **/
 442 void e1000_vfta_set_vf(struct e1000_hw *hw, u16 vid, bool set)
 443 {
 444         u32 msgbuf[2];
 445
 446         msgbuf[0] = E1000_VF_SET_VLAN;
 447         msgbuf[1] = vid;
 448         /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
 449         if (set)
 450                 msgbuf[0] |= E1000_VF_SET_VLAN_ADD;
 451
 452         e1000_write_msg_read_ack(hw, msgbuf, 2);
 453 }
 454
 455 /** e1000_rlpml_set_vf - Set the maximum receive packet length
 456  *  @hw: pointer to the HW structure
 457  *  @max_size: value to assign to max frame size
 458  **/
 459 void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
 460 {
 461         u32 msgbuf[2];
 462
 463         msgbuf[0] = E1000_VF_SET_LPE;
 464         msgbuf[1] = max_size;
 465
 466         e1000_write_msg_read_ack(hw, msgbuf, 2);
 467 }
 468
 469 /**
 470  *  e1000_promisc_set_vf - Set flags for Unicast or Multicast promisc
 471  *  @hw: pointer to the HW structure
 472  *  @uni: boolean indicating unicast promisc status
 473  *  @multi: boolean indicating multicast promisc status
 474  **/
 475 s32 e1000_promisc_set_vf(struct e1000_hw *hw, enum e1000_promisc_type type)
 476 {
 477         struct e1000_mbx_info *mbx = &hw->mbx;
 478         u32 msgbuf = E1000_VF_SET_PROMISC;
 479         s32 ret_val;
 480
 481         switch (type) {
 482         case e1000_promisc_multicast:
 483                 msgbuf |= E1000_VF_SET_PROMISC_MULTICAST;
 484                 break;
 485         case e1000_promisc_enabled:
 486                 msgbuf |= E1000_VF_SET_PROMISC_MULTICAST;
 487         case e1000_promisc_unicast:
 488                 msgbuf |= E1000_VF_SET_PROMISC_UNICAST;
 489         case e1000_promisc_disabled:
 490                 break;
 491         default:
 492                 return -E1000_ERR_MAC_INIT;
 493         }
 494
 495          ret_val = mbx->ops.write_posted(hw, &msgbuf, 1, 0);
 496
 497         if (!ret_val)
 498                 ret_val = mbx->ops.read_posted(hw, &msgbuf, 1, 0);
 499
 500         if (!ret_val && !(msgbuf & E1000_VT_MSGTYPE_ACK))
 501                 ret_val = -E1000_ERR_MAC_INIT;
 502
 503         return ret_val;
 504 }
 505
 506 /**
 507  *  e1000_read_mac_addr_vf - Read device MAC address
 508  *  @hw: pointer to the HW structure
 509  **/
 510 static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
 511 {
 512         int i;
 513
 514         for (i = 0; i < ETH_ADDR_LEN; i++)
 515                 hw->mac.addr[i] = hw->mac.perm_addr[i];
 516
 517         return E1000_SUCCESS;
 518 }
 519
 520 /**
 521  *  e1000_check_for_link_vf - Check for link for a virtual interface
 522  *  @hw: pointer to the HW structure
 523  *
 524  *  Checks to see if the underlying PF is still talking to the VF and
 525  *  if it is then it reports the link state to the hardware, otherwise
 526  *  it reports link down and returns an error.
 527  **/
 528 static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
 529 {
 530         struct e1000_mbx_info *mbx = &hw->mbx;
 531         struct e1000_mac_info *mac = &hw->mac;
 532         s32 ret_val = E1000_SUCCESS;
 533         u32 in_msg = 0;
 534
 535         DEBUGFUNC("e1000_check_for_link_vf");
 536
 537         /*
 538          * We only want to run this if there has been a rst asserted.
 539          * in this case that could mean a link change, device reset,
 540          * or a virtual function reset
 541          */
 542
 543         /* If we were hit with a reset or timeout drop the link */
 544         if (!mbx->ops.check_for_rst(hw, 0) || !mbx->timeout)
 545                 mac->get_link_status = TRUE;
 546
 547         if (!mac->get_link_status)
 548                 goto out;
 549
 550         /* if link status is down no point in checking to see if pf is up */
 551         if (!(E1000_READ_REG(hw, E1000_STATUS) & E1000_STATUS_LU))
 552                 goto out;
 553
 554         /* if the read failed it could just be a mailbox collision, best wait
 555          * until we are called again and don't report an error */
 556         if (mbx->ops.read(hw, &in_msg, 1, 0))
 557                 goto out;
 558
 559         /* if incoming message isn't clear to send we are waiting on response */
 560         if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
 561                 /* message is not CTS and is NACK we have lost CTS status */
 562                 if (in_msg & E1000_VT_MSGTYPE_NACK)
 563                         ret_val = -E1000_ERR_MAC_INIT;
 564                 goto out;
 565         }
 566
 567         /* at this point we know the PF is talking to us, check and see if
 568          * we are still accepting timeout or if we had a timeout failure.
 569          * if we failed then we will need to reinit */
 570         if (!mbx->timeout) {
 571                 ret_val = -E1000_ERR_MAC_INIT;
 572                 goto out;
 573         }
 574
 575         /* if we passed all the tests above then the link is up and we no
 576          * longer need to check for link */
 577         mac->get_link_status = FALSE;
 578
 579 out:
 580         return ret_val;
 581 }
 582