drivers/net/ethernet/intel/fm10k/fm10k_vf.c

   1 /* Intel(R) Ethernet Switch Host Interface Driver
   2  * Copyright(c) 2013 - 2016 Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * The full GNU General Public License is included in this distribution in
  14  * the file called "COPYING".
  15  *
  16  * Contact Information:
  17  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  18  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  19  */
  20
  21 #include "fm10k_vf.h"
  22
  23 /**
  24  *  fm10k_stop_hw_vf - Stop Tx/Rx units
  25  *  @hw: pointer to hardware structure
  26  *
  27  **/
  28 static s32 fm10k_stop_hw_vf(struct fm10k_hw *hw)
  29 {
  30         u8 *perm_addr = hw->mac.perm_addr;
  31         u32 bal = 0, bah = 0, tdlen;
  32         s32 err;
  33         u16 i;
  34
  35         /* we need to disable the queues before taking further steps */
  36         err = fm10k_stop_hw_generic(hw);
  37         if (err && err != FM10K_ERR_REQUESTS_PENDING)
  38                 return err;
  39
  40         /* If permanent address is set then we need to restore it */
  41         if (is_valid_ether_addr(perm_addr)) {
  42                 bal = (((u32)perm_addr[3]) << 24) |
  43                       (((u32)perm_addr[4]) << 16) |
  44                       (((u32)perm_addr[5]) << 8);
  45                 bah = (((u32)0xFF)         << 24) |
  46                       (((u32)perm_addr[0]) << 16) |
  47                       (((u32)perm_addr[1]) << 8) |
  48                        ((u32)perm_addr[2]);
  49         }
  50
  51         /* restore default itr_scale for next VF initialization */
  52         tdlen = hw->mac.itr_scale << FM10K_TDLEN_ITR_SCALE_SHIFT;
  53
  54         /* The queues have already been disabled so we just need to
  55          * update their base address registers
  56          */
  57         for (i = 0; i < hw->mac.max_queues; i++) {
  58                 fm10k_write_reg(hw, FM10K_TDBAL(i), bal);
  59                 fm10k_write_reg(hw, FM10K_TDBAH(i), bah);
  60                 fm10k_write_reg(hw, FM10K_RDBAL(i), bal);
  61                 fm10k_write_reg(hw, FM10K_RDBAH(i), bah);
  62                 /* Restore ITR scale in software-defined mechanism in TDLEN
  63                  * for next VF initialization. See definition of
  64                  * FM10K_TDLEN_ITR_SCALE_SHIFT for more details on the use of
  65                  * TDLEN here.
  66                  */
  67                 fm10k_write_reg(hw, FM10K_TDLEN(i), tdlen);
  68         }
  69
  70         return err;
  71 }
  72
  73 /**
  74  *  fm10k_reset_hw_vf - VF hardware reset
  75  *  @hw: pointer to hardware structure
  76  *
  77  *  This function should return the hardware to a state similar to the
  78  *  one it is in after just being initialized.
  79  **/
  80 static s32 fm10k_reset_hw_vf(struct fm10k_hw *hw)
  81 {
  82         s32 err;
  83
  84         /* shut down queues we own and reset DMA configuration */
  85         err = fm10k_stop_hw_vf(hw);
  86         if (err == FM10K_ERR_REQUESTS_PENDING)
  87                 hw->mac.reset_while_pending++;
  88         else if (err)
  89                 return err;
  90
  91         /* Inititate VF reset */
  92         fm10k_write_reg(hw, FM10K_VFCTRL, FM10K_VFCTRL_RST);
  93
  94         /* Flush write and allow 100us for reset to complete */
  95         fm10k_write_flush(hw);
  96         udelay(FM10K_RESET_TIMEOUT);
  97
  98         /* Clear reset bit and verify it was cleared */
  99         fm10k_write_reg(hw, FM10K_VFCTRL, 0);
 100         if (fm10k_read_reg(hw, FM10K_VFCTRL) & FM10K_VFCTRL_RST)
 101                 return FM10K_ERR_RESET_FAILED;
 102
 103         return 0;
 104 }
 105
 106 /**
 107  *  fm10k_init_hw_vf - VF hardware initialization
 108  *  @hw: pointer to hardware structure
 109  *
 110  **/
 111 static s32 fm10k_init_hw_vf(struct fm10k_hw *hw)
 112 {
 113         u32 tqdloc, tqdloc0 = ~fm10k_read_reg(hw, FM10K_TQDLOC(0));
 114         s32 err;
 115         u16 i;
 116
 117         /* verify we have at least 1 queue */
 118         if (!~fm10k_read_reg(hw, FM10K_TXQCTL(0)) ||
 119             !~fm10k_read_reg(hw, FM10K_RXQCTL(0))) {
 120                 err = FM10K_ERR_NO_RESOURCES;
 121                 goto reset_max_queues;
 122         }
 123
 124         /* determine how many queues we have */
 125         for (i = 1; tqdloc0 && (i < FM10K_MAX_QUEUES_POOL); i++) {
 126                 /* verify the Descriptor cache offsets are increasing */
 127                 tqdloc = ~fm10k_read_reg(hw, FM10K_TQDLOC(i));
 128                 if (!tqdloc || (tqdloc == tqdloc0))
 129                         break;
 130
 131                 /* check to verify the PF doesn't own any of our queues */
 132                 if (!~fm10k_read_reg(hw, FM10K_TXQCTL(i)) ||
 133                     !~fm10k_read_reg(hw, FM10K_RXQCTL(i)))
 134                         break;
 135         }
 136
 137         /* shut down queues we own and reset DMA configuration */
 138         err = fm10k_disable_queues_generic(hw, i);
 139         if (err)
 140                 goto reset_max_queues;
 141
 142         /* record maximum queue count */
 143         hw->mac.max_queues = i;
 144
 145         /* fetch default VLAN and ITR scale */
 146         hw->mac.default_vid = (fm10k_read_reg(hw, FM10K_TXQCTL(0)) &
 147                                FM10K_TXQCTL_VID_MASK) >> FM10K_TXQCTL_VID_SHIFT;
 148         /* Read the ITR scale from TDLEN. See the definition of
 149          * FM10K_TDLEN_ITR_SCALE_SHIFT for more information about how TDLEN is
 150          * used here.
 151          */
 152         hw->mac.itr_scale = (fm10k_read_reg(hw, FM10K_TDLEN(0)) &
 153                              FM10K_TDLEN_ITR_SCALE_MASK) >>
 154                             FM10K_TDLEN_ITR_SCALE_SHIFT;
 155
 156         return 0;
 157
 158 reset_max_queues:
 159         hw->mac.max_queues = 0;
 160
 161         return err;
 162 }
 163
 164 /* This structure defines the attibutes to be parsed below */
 165 const struct fm10k_tlv_attr fm10k_mac_vlan_msg_attr[] = {
 166         FM10K_TLV_ATTR_U32(FM10K_MAC_VLAN_MSG_VLAN),
 167         FM10K_TLV_ATTR_BOOL(FM10K_MAC_VLAN_MSG_SET),
 168         FM10K_TLV_ATTR_MAC_ADDR(FM10K_MAC_VLAN_MSG_MAC),
 169         FM10K_TLV_ATTR_MAC_ADDR(FM10K_MAC_VLAN_MSG_DEFAULT_MAC),
 170         FM10K_TLV_ATTR_MAC_ADDR(FM10K_MAC_VLAN_MSG_MULTICAST),
 171         FM10K_TLV_ATTR_LAST
 172 };
 173
 174 /**
 175  *  fm10k_update_vlan_vf - Update status of VLAN ID in VLAN filter table
 176  *  @hw: pointer to hardware structure
 177  *  @vid: VLAN ID to add to table
 178  *  @vsi: Reserved, should always be 0
 179  *  @set: Indicates if this is a set or clear operation
 180  *
 181  *  This function adds or removes the corresponding VLAN ID from the VLAN
 182  *  filter table for this VF.
 183  **/
 184 static s32 fm10k_update_vlan_vf(struct fm10k_hw *hw, u32 vid, u8 vsi, bool set)
 185 {
 186         struct fm10k_mbx_info *mbx = &hw->mbx;
 187         u32 msg[4];
 188
 189         /* verify the index is not set */
 190         if (vsi)
 191                 return FM10K_ERR_PARAM;
 192
 193         /* clever trick to verify reserved bits in both vid and length */
 194         if ((vid << 16 | vid) >> 28)
 195                 return FM10K_ERR_PARAM;
 196
 197         /* encode set bit into the VLAN ID */
 198         if (!set)
 199                 vid |= FM10K_VLAN_CLEAR;
 200
 201         /* generate VLAN request */
 202         fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MAC_VLAN);
 203         fm10k_tlv_attr_put_u32(msg, FM10K_MAC_VLAN_MSG_VLAN, vid);
 204
 205         /* load onto outgoing mailbox */
 206         return mbx->ops.enqueue_tx(hw, mbx, msg);
 207 }
 208
 209 /**
 210  *  fm10k_msg_mac_vlan_vf - Read device MAC address from mailbox message
 211  *  @hw: pointer to the HW structure
 212  *  @results: Attributes for message
 213  *  @mbx: unused mailbox data
 214  *
 215  *  This function should determine the MAC address for the VF
 216  **/
 217 s32 fm10k_msg_mac_vlan_vf(struct fm10k_hw *hw, u32 **results,
 218                           struct fm10k_mbx_info *mbx)
 219 {
 220         u8 perm_addr[ETH_ALEN];
 221         u16 vid;
 222         s32 err;
 223
 224         /* record MAC address requested */
 225         err = fm10k_tlv_attr_get_mac_vlan(
 226                                         results[FM10K_MAC_VLAN_MSG_DEFAULT_MAC],
 227                                         perm_addr, &vid);
 228         if (err)
 229                 return err;
 230
 231         ether_addr_copy(hw->mac.perm_addr, perm_addr);
 232         hw->mac.default_vid = vid & (FM10K_VLAN_TABLE_VID_MAX - 1);
 233         hw->mac.vlan_override = !!(vid & FM10K_VLAN_OVERRIDE);
 234
 235         return 0;
 236 }
 237
 238 /**
 239  *  fm10k_read_mac_addr_vf - Read device MAC address
 240  *  @hw: pointer to the HW structure
 241  *
 242  *  This function should determine the MAC address for the VF
 243  **/
 244 static s32 fm10k_read_mac_addr_vf(struct fm10k_hw *hw)
 245 {
 246         u8 perm_addr[ETH_ALEN];
 247         u32 base_addr;
 248
 249         base_addr = fm10k_read_reg(hw, FM10K_TDBAL(0));
 250
 251         /* last byte should be 0 */
 252         if (base_addr << 24)
 253                 return  FM10K_ERR_INVALID_MAC_ADDR;
 254
 255         perm_addr[3] = (u8)(base_addr >> 24);
 256         perm_addr[4] = (u8)(base_addr >> 16);
 257         perm_addr[5] = (u8)(base_addr >> 8);
 258
 259         base_addr = fm10k_read_reg(hw, FM10K_TDBAH(0));
 260
 261         /* first byte should be all 1's */
 262         if ((~base_addr) >> 24)
 263                 return  FM10K_ERR_INVALID_MAC_ADDR;
 264
 265         perm_addr[0] = (u8)(base_addr >> 16);
 266         perm_addr[1] = (u8)(base_addr >> 8);
 267         perm_addr[2] = (u8)(base_addr);
 268
 269         ether_addr_copy(hw->mac.perm_addr, perm_addr);
 270         ether_addr_copy(hw->mac.addr, perm_addr);
 271
 272         return 0;
 273 }
 274
 275 /**
 276  *  fm10k_update_uc_addr_vf - Update device unicast addresses
 277  *  @hw: pointer to the HW structure
 278  *  @glort: unused
 279  *  @mac: MAC address to add/remove from table
 280  *  @vid: VLAN ID to add/remove from table
 281  *  @add: Indicates if this is an add or remove operation
 282  *  @flags: flags field to indicate add and secure - unused
 283  *
 284  *  This function is used to add or remove unicast MAC addresses for
 285  *  the VF.
 286  **/
 287 static s32 fm10k_update_uc_addr_vf(struct fm10k_hw *hw, u16 glort,
 288                                    const u8 *mac, u16 vid, bool add, u8 flags)
 289 {
 290         struct fm10k_mbx_info *mbx = &hw->mbx;
 291         u32 msg[7];
 292
 293         /* verify VLAN ID is valid */
 294         if (vid >= FM10K_VLAN_TABLE_VID_MAX)
 295                 return FM10K_ERR_PARAM;
 296
 297         /* verify MAC address is valid */
 298         if (!is_valid_ether_addr(mac))
 299                 return FM10K_ERR_PARAM;
 300
 301         /* verify we are not locked down on the MAC address */
 302         if (is_valid_ether_addr(hw->mac.perm_addr) &&
 303             !ether_addr_equal(hw->mac.perm_addr, mac))
 304                 return FM10K_ERR_PARAM;
 305
 306         /* add bit to notify us if this is a set or clear operation */
 307         if (!add)
 308                 vid |= FM10K_VLAN_CLEAR;
 309
 310         /* generate VLAN request */
 311         fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MAC_VLAN);
 312         fm10k_tlv_attr_put_mac_vlan(msg, FM10K_MAC_VLAN_MSG_MAC, mac, vid);
 313
 314         /* load onto outgoing mailbox */
 315         return mbx->ops.enqueue_tx(hw, mbx, msg);
 316 }
 317
 318 /**
 319  *  fm10k_update_mc_addr_vf - Update device multicast addresses
 320  *  @hw: pointer to the HW structure
 321  *  @glort: unused
 322  *  @mac: MAC address to add/remove from table
 323  *  @vid: VLAN ID to add/remove from table
 324  *  @add: Indicates if this is an add or remove operation
 325  *
 326  *  This function is used to add or remove multicast MAC addresses for
 327  *  the VF.
 328  **/
 329 static s32 fm10k_update_mc_addr_vf(struct fm10k_hw *hw, u16 glort,
 330                                    const u8 *mac, u16 vid, bool add)
 331 {
 332         struct fm10k_mbx_info *mbx = &hw->mbx;
 333         u32 msg[7];
 334
 335         /* verify VLAN ID is valid */
 336         if (vid >= FM10K_VLAN_TABLE_VID_MAX)
 337                 return FM10K_ERR_PARAM;
 338
 339         /* verify multicast address is valid */
 340         if (!is_multicast_ether_addr(mac))
 341                 return FM10K_ERR_PARAM;
 342
 343         /* add bit to notify us if this is a set or clear operation */
 344         if (!add)
 345                 vid |= FM10K_VLAN_CLEAR;
 346
 347         /* generate VLAN request */
 348         fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MAC_VLAN);
 349         fm10k_tlv_attr_put_mac_vlan(msg, FM10K_MAC_VLAN_MSG_MULTICAST,
 350                                     mac, vid);
 351
 352         /* load onto outgoing mailbox */
 353         return mbx->ops.enqueue_tx(hw, mbx, msg);
 354 }
 355
 356 /**
 357  *  fm10k_update_int_moderator_vf - Request update of interrupt moderator list
 358  *  @hw: pointer to hardware structure
 359  *
 360  *  This function will issue a request to the PF to rescan our MSI-X table
 361  *  and to update the interrupt moderator linked list.
 362  **/
 363 static void fm10k_update_int_moderator_vf(struct fm10k_hw *hw)
 364 {
 365         struct fm10k_mbx_info *mbx = &hw->mbx;
 366         u32 msg[1];
 367
 368         /* generate MSI-X request */
 369         fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MSIX);
 370
 371         /* load onto outgoing mailbox */
 372         mbx->ops.enqueue_tx(hw, mbx, msg);
 373 }
 374
 375 /* This structure defines the attibutes to be parsed below */
 376 const struct fm10k_tlv_attr fm10k_lport_state_msg_attr[] = {
 377         FM10K_TLV_ATTR_BOOL(FM10K_LPORT_STATE_MSG_DISABLE),
 378         FM10K_TLV_ATTR_U8(FM10K_LPORT_STATE_MSG_XCAST_MODE),
 379         FM10K_TLV_ATTR_BOOL(FM10K_LPORT_STATE_MSG_READY),
 380         FM10K_TLV_ATTR_LAST
 381 };
 382
 383 /**
 384  *  fm10k_msg_lport_state_vf - Message handler for lport_state message from PF
 385  *  @hw: Pointer to hardware structure
 386  *  @results: pointer array containing parsed data
 387  *  @mbx: Pointer to mailbox information structure
 388  *
 389  *  This handler is meant to capture the indication from the PF that we
 390  *  are ready to bring up the interface.
 391  **/
 392 s32 fm10k_msg_lport_state_vf(struct fm10k_hw *hw, u32 **results,
 393                              struct fm10k_mbx_info *mbx)
 394 {
 395         hw->mac.dglort_map = !results[FM10K_LPORT_STATE_MSG_READY] ?
 396                              FM10K_DGLORTMAP_NONE : FM10K_DGLORTMAP_ZERO;
 397
 398         return 0;
 399 }
 400
 401 /**
 402  *  fm10k_update_lport_state_vf - Update device state in lower device
 403  *  @hw: pointer to the HW structure
 404  *  @glort: unused
 405  *  @count: number of logical ports to enable - unused (always 1)
 406  *  @enable: boolean value indicating if this is an enable or disable request
 407  *
 408  *  Notify the lower device of a state change.  If the lower device is
 409  *  enabled we can add filters, if it is disabled all filters for this
 410  *  logical port are flushed.
 411  **/
 412 static s32 fm10k_update_lport_state_vf(struct fm10k_hw *hw, u16 glort,
 413                                        u16 count, bool enable)
 414 {
 415         struct fm10k_mbx_info *mbx = &hw->mbx;
 416         u32 msg[2];
 417
 418         /* reset glort mask 0 as we have to wait to be enabled */
 419         hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
 420
 421         /* generate port state request */
 422         fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_LPORT_STATE);
 423         if (!enable)
 424                 fm10k_tlv_attr_put_bool(msg, FM10K_LPORT_STATE_MSG_DISABLE);
 425
 426         /* load onto outgoing mailbox */
 427         return mbx->ops.enqueue_tx(hw, mbx, msg);
 428 }
 429
 430 /**
 431  *  fm10k_update_xcast_mode_vf - Request update of multicast mode
 432  *  @hw: pointer to hardware structure
 433  *  @glort: unused
 434  *  @mode: integer value indicating mode being requested
 435  *
 436  *  This function will attempt to request a higher mode for the port
 437  *  so that it can enable either multicast, multicast promiscuous, or
 438  *  promiscuous mode of operation.
 439  **/
 440 static s32 fm10k_update_xcast_mode_vf(struct fm10k_hw *hw, u16 glort, u8 mode)
 441 {
 442         struct fm10k_mbx_info *mbx = &hw->mbx;
 443         u32 msg[3];
 444
 445         if (mode > FM10K_XCAST_MODE_NONE)
 446                 return FM10K_ERR_PARAM;
 447
 448         /* generate message requesting to change xcast mode */
 449         fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_LPORT_STATE);
 450         fm10k_tlv_attr_put_u8(msg, FM10K_LPORT_STATE_MSG_XCAST_MODE, mode);
 451
 452         /* load onto outgoing mailbox */
 453         return mbx->ops.enqueue_tx(hw, mbx, msg);
 454 }
 455
 456 /**
 457  *  fm10k_update_hw_stats_vf - Updates hardware related statistics of VF
 458  *  @hw: pointer to hardware structure
 459  *  @stats: pointer to statistics structure
 460  *
 461  *  This function collects and aggregates per queue hardware statistics.
 462  **/
 463 static void fm10k_update_hw_stats_vf(struct fm10k_hw *hw,
 464                                      struct fm10k_hw_stats *stats)
 465 {
 466         fm10k_update_hw_stats_q(hw, stats->q, 0, hw->mac.max_queues);
 467 }
 468
 469 /**
 470  *  fm10k_rebind_hw_stats_vf - Resets base for hardware statistics of VF
 471  *  @hw: pointer to hardware structure
 472  *  @stats: pointer to the stats structure to update
 473  *
 474  *  This function resets the base for queue hardware statistics.
 475  **/
 476 static void fm10k_rebind_hw_stats_vf(struct fm10k_hw *hw,
 477                                      struct fm10k_hw_stats *stats)
 478 {
 479         /* Unbind Queue Statistics */
 480         fm10k_unbind_hw_stats_q(stats->q, 0, hw->mac.max_queues);
 481
 482         /* Reinitialize bases for all stats */
 483         fm10k_update_hw_stats_vf(hw, stats);
 484 }
 485
 486 /**
 487  *  fm10k_configure_dglort_map_vf - Configures GLORT entry and queues
 488  *  @hw: pointer to hardware structure
 489  *  @dglort: pointer to dglort configuration structure
 490  *
 491  *  Reads the configuration structure contained in dglort_cfg and uses
 492  *  that information to then populate a DGLORTMAP/DEC entry and the queues
 493  *  to which it has been assigned.
 494  **/
 495 static s32 fm10k_configure_dglort_map_vf(struct fm10k_hw *hw,
 496                                          struct fm10k_dglort_cfg *dglort)
 497 {
 498         /* verify the dglort pointer */
 499         if (!dglort)
 500                 return FM10K_ERR_PARAM;
 501
 502         /* stub for now until we determine correct message for this */
 503
 504         return 0;
 505 }
 506
 507 static const struct fm10k_msg_data fm10k_msg_data_vf[] = {
 508         FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
 509         FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_msg_mac_vlan_vf),
 510         FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
 511         FM10K_TLV_MSG_ERROR_HANDLER(fm10k_tlv_msg_error),
 512 };
 513
 514 static const struct fm10k_mac_ops mac_ops_vf = {
 515         .get_bus_info           = fm10k_get_bus_info_generic,
 516         .reset_hw               = fm10k_reset_hw_vf,
 517         .init_hw                = fm10k_init_hw_vf,
 518         .start_hw               = fm10k_start_hw_generic,
 519         .stop_hw                = fm10k_stop_hw_vf,
 520         .update_vlan            = fm10k_update_vlan_vf,
 521         .read_mac_addr          = fm10k_read_mac_addr_vf,
 522         .update_uc_addr         = fm10k_update_uc_addr_vf,
 523         .update_mc_addr         = fm10k_update_mc_addr_vf,
 524         .update_xcast_mode      = fm10k_update_xcast_mode_vf,
 525         .update_int_moderator   = fm10k_update_int_moderator_vf,
 526         .update_lport_state     = fm10k_update_lport_state_vf,
 527         .update_hw_stats        = fm10k_update_hw_stats_vf,
 528         .rebind_hw_stats        = fm10k_rebind_hw_stats_vf,
 529         .configure_dglort_map   = fm10k_configure_dglort_map_vf,
 530         .get_host_state         = fm10k_get_host_state_generic,
 531 };
 532
 533 static s32 fm10k_get_invariants_vf(struct fm10k_hw *hw)
 534 {
 535         fm10k_get_invariants_generic(hw);
 536
 537         return fm10k_pfvf_mbx_init(hw, &hw->mbx, fm10k_msg_data_vf, 0);
 538 }
 539
 540 const struct fm10k_info fm10k_vf_info = {
 541         .mac            = fm10k_mac_vf,
 542         .get_invariants = fm10k_get_invariants_vf,
 543         .mac_ops        = &mac_ops_vf,
 544 };