1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 1999 - 2024 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 s32 retval = ixgbevf_write_mbx(hw, msg, size); 17 18 if (retval) 19 return retval; 20 21 return ixgbevf_poll_mbx(hw, retmsg, size); 22 } 23 24 /** 25 * ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx 26 * @hw: pointer to hardware structure 27 * 28 * Starts the hardware by filling the bus info structure and media type, clears 29 * all on chip counters, initializes receive address registers, multicast 30 * table, VLAN filter table, calls routine to set up link and flow control 31 * settings, and leaves transmit and receive units disabled and uninitialized 32 **/ 33 static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw) 34 { 35 /* Clear adapter stopped flag */ 36 hw->adapter_stopped = false; 37 38 return 0; 39 } 40 41 /** 42 * ixgbevf_init_hw_vf - virtual function hardware initialization 43 * @hw: pointer to hardware structure 44 * 45 * Initialize the hardware by resetting the hardware and then starting 46 * the hardware 47 **/ 48 static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw) 49 { 50 s32 status = hw->mac.ops.start_hw(hw); 51 52 hw->mac.ops.get_mac_addr(hw, hw->mac.addr); 53 54 return status; 55 } 56 57 /** 58 * ixgbevf_reset_hw_vf - Performs hardware reset 59 * @hw: pointer to hardware structure 60 * 61 * Resets the hardware by resetting the transmit and receive units, masks and 62 * clears all interrupts. 63 **/ 64 static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw) 65 { 66 struct ixgbe_mbx_info *mbx = &hw->mbx; 67 u32 timeout = IXGBE_VF_INIT_TIMEOUT; 68 u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN]; 69 u8 *addr = (u8 *)(&msgbuf[1]); 70 s32 ret_val; 71 72 /* Call adapter stop to disable tx/rx and clear interrupts */ 73 hw->mac.ops.stop_adapter(hw); 74 75 /* reset the api version */ 76 hw->api_version = ixgbe_mbox_api_10; 77 hw->mbx.ops.init_params(hw); 78 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy, 79 sizeof(struct ixgbe_mbx_operations)); 80 81 IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST); 82 IXGBE_WRITE_FLUSH(hw); 83 84 /* we cannot reset while the RSTI / RSTD bits are asserted */ 85 while (!mbx->ops.check_for_rst(hw) && timeout) { 86 timeout--; 87 udelay(5); 88 } 89 90 if (!timeout) 91 return IXGBE_ERR_RESET_FAILED; 92 93 /* mailbox timeout can now become active */ 94 mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT; 95 96 msgbuf[0] = IXGBE_VF_RESET; 97 ixgbevf_write_mbx(hw, msgbuf, 1); 98 99 mdelay(10); 100 101 /* set our "perm_addr" based on info provided by PF 102 * also set up the mc_filter_type which is piggy backed 103 * on the mac address in word 3 104 */ 105 ret_val = ixgbevf_poll_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN); 106 if (ret_val) 107 return ret_val; 108 109 /* New versions of the PF may NACK the reset return message 110 * to indicate that no MAC address has yet been assigned for 111 * the VF. 112 */ 113 if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS) && 114 msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_FAILURE)) 115 return IXGBE_ERR_INVALID_MAC_ADDR; 116 117 if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS)) 118 ether_addr_copy(hw->mac.perm_addr, addr); 119 120 hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD]; 121 122 return 0; 123 } 124 125 /** 126 * ixgbevf_hv_reset_hw_vf - reset via Hyper-V 127 * @hw: pointer to private hardware struct 128 * 129 * Hyper-V variant; the VF/PF communication is through the PCI 130 * config space. 131 */ 132 static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw) 133 { 134 #if IS_ENABLED(CONFIG_PCI_MMCONFIG) 135 struct ixgbevf_adapter *adapter = hw->back; 136 int i; 137 138 for (i = 0; i < 6; i++) 139 pci_read_config_byte(adapter->pdev, 140 (i + IXGBE_HV_RESET_OFFSET), 141 &hw->mac.perm_addr[i]); 142 return 0; 143 #else 144 pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n"); 145 return -EOPNOTSUPP; 146 #endif 147 } 148 149 /** 150 * ixgbevf_stop_hw_vf - Generic stop Tx/Rx units 151 * @hw: pointer to hardware structure 152 * 153 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts, 154 * disables transmit and receive units. The adapter_stopped flag is used by 155 * the shared code and drivers to determine if the adapter is in a stopped 156 * state and should not touch the hardware. 157 **/ 158 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw) 159 { 160 u32 number_of_queues; 161 u32 reg_val; 162 u16 i; 163 164 /* Set the adapter_stopped flag so other driver functions stop touching 165 * the hardware 166 */ 167 hw->adapter_stopped = true; 168 169 /* Disable the receive unit by stopped each queue */ 170 number_of_queues = hw->mac.max_rx_queues; 171 for (i = 0; i < number_of_queues; i++) { 172 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i)); 173 if (reg_val & IXGBE_RXDCTL_ENABLE) { 174 reg_val &= ~IXGBE_RXDCTL_ENABLE; 175 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val); 176 } 177 } 178 179 IXGBE_WRITE_FLUSH(hw); 180 181 /* Clear interrupt mask to stop from interrupts being generated */ 182 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK); 183 184 /* Clear any pending interrupts */ 185 IXGBE_READ_REG(hw, IXGBE_VTEICR); 186 187 /* Disable the transmit unit. Each queue must be disabled. */ 188 number_of_queues = hw->mac.max_tx_queues; 189 for (i = 0; i < number_of_queues; i++) { 190 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i)); 191 if (reg_val & IXGBE_TXDCTL_ENABLE) { 192 reg_val &= ~IXGBE_TXDCTL_ENABLE; 193 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val); 194 } 195 } 196 197 return 0; 198 } 199 200 /** 201 * ixgbevf_mta_vector - Determines bit-vector in multicast table to set 202 * @hw: pointer to hardware structure 203 * @mc_addr: the multicast address 204 * 205 * Extracts the 12 bits, from a multicast address, to determine which 206 * bit-vector to set in the multicast table. The hardware uses 12 bits, from 207 * incoming Rx multicast addresses, to determine the bit-vector to check in 208 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set 209 * by the MO field of the MCSTCTRL. The MO field is set during initialization 210 * to mc_filter_type. 211 **/ 212 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr) 213 { 214 u32 vector = 0; 215 216 switch (hw->mac.mc_filter_type) { 217 case 0: /* use bits [47:36] of the address */ 218 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4)); 219 break; 220 case 1: /* use bits [46:35] of the address */ 221 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5)); 222 break; 223 case 2: /* use bits [45:34] of the address */ 224 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6)); 225 break; 226 case 3: /* use bits [43:32] of the address */ 227 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8)); 228 break; 229 default: /* Invalid mc_filter_type */ 230 break; 231 } 232 233 /* vector can only be 12-bits or boundary will be exceeded */ 234 vector &= 0xFFF; 235 return vector; 236 } 237 238 /** 239 * ixgbevf_get_mac_addr_vf - Read device MAC address 240 * @hw: pointer to the HW structure 241 * @mac_addr: pointer to storage for retrieved MAC address 242 **/ 243 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr) 244 { 245 ether_addr_copy(mac_addr, hw->mac.perm_addr); 246 247 return 0; 248 } 249 250 static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr) 251 { 252 u32 msgbuf[3], msgbuf_chk; 253 u8 *msg_addr = (u8 *)(&msgbuf[1]); 254 s32 ret_val; 255 256 memset(msgbuf, 0, sizeof(msgbuf)); 257 /* If index is one then this is the start of a new list and needs 258 * indication to the PF so it can do its own list management. 259 * If it is zero then that tells the PF to just clear all of 260 * this VF's macvlans and there is no new list. 261 */ 262 msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT; 263 msgbuf[0] |= IXGBE_VF_SET_MACVLAN; 264 msgbuf_chk = msgbuf[0]; 265 266 if (addr) 267 ether_addr_copy(msg_addr, addr); 268 269 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 270 ARRAY_SIZE(msgbuf)); 271 if (!ret_val) { 272 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 273 274 if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_FAILURE)) 275 return -ENOMEM; 276 } 277 278 return ret_val; 279 } 280 281 static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr) 282 { 283 return -EOPNOTSUPP; 284 } 285 286 /** 287 * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents. 288 * @hw: pointer to hardware structure 289 * @reta: buffer to fill with RETA contents. 290 * @num_rx_queues: Number of Rx queues configured for this port 291 * 292 * The "reta" buffer should be big enough to contain 32 registers. 293 * 294 * Returns: 0 on success. 295 * if API doesn't support this operation - (-EOPNOTSUPP). 296 */ 297 int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues) 298 { 299 int err, i, j; 300 u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; 301 u32 *hw_reta = &msgbuf[1]; 302 u32 mask = 0; 303 304 /* We have to use a mailbox for 82599 and x540 devices only. 305 * For these devices RETA has 128 entries. 306 * Also these VFs support up to 4 RSS queues. Therefore PF will compress 307 * 16 RETA entries in each DWORD giving 2 bits to each entry. 308 */ 309 int dwords = IXGBEVF_82599_RETA_SIZE / 16; 310 311 /* We support the RSS querying for 82599 and x540 devices only. 312 * Thus return an error if API doesn't support RETA querying or querying 313 * is not supported for this device type. 314 */ 315 switch (hw->api_version) { 316 case ixgbe_mbox_api_17: 317 case ixgbe_mbox_api_16: 318 case ixgbe_mbox_api_15: 319 case ixgbe_mbox_api_14: 320 case ixgbe_mbox_api_13: 321 case ixgbe_mbox_api_12: 322 if (hw->mac.type < ixgbe_mac_X550_vf) 323 break; 324 fallthrough; 325 default: 326 return -EOPNOTSUPP; 327 } 328 329 msgbuf[0] = IXGBE_VF_GET_RETA; 330 331 err = ixgbevf_write_mbx(hw, msgbuf, 1); 332 333 if (err) 334 return err; 335 336 err = ixgbevf_poll_mbx(hw, msgbuf, dwords + 1); 337 338 if (err) 339 return err; 340 341 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 342 343 /* If the operation has been refused by a PF return -EPERM */ 344 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_FAILURE)) 345 return -EPERM; 346 347 /* If we didn't get an ACK there must have been 348 * some sort of mailbox error so we should treat it 349 * as such. 350 */ 351 if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_SUCCESS)) 352 return IXGBE_ERR_MBX; 353 354 /* ixgbevf doesn't support more than 2 queues at the moment */ 355 if (num_rx_queues > 1) 356 mask = 0x1; 357 358 for (i = 0; i < dwords; i++) 359 for (j = 0; j < 16; j++) 360 reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask; 361 362 return 0; 363 } 364 365 /** 366 * ixgbevf_get_rss_key_locked - get the RSS Random Key 367 * @hw: pointer to the HW structure 368 * @rss_key: buffer to fill with RSS Hash Key contents. 369 * 370 * The "rss_key" buffer should be big enough to contain 10 registers. 371 * 372 * Returns: 0 on success. 373 * if API doesn't support this operation - (-EOPNOTSUPP). 374 */ 375 int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key) 376 { 377 int err; 378 u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; 379 380 /* We currently support the RSS Random Key retrieval for 82599 and x540 381 * devices only. 382 * 383 * Thus return an error if API doesn't support RSS Random Key retrieval 384 * or if the operation is not supported for this device type. 385 */ 386 switch (hw->api_version) { 387 case ixgbe_mbox_api_17: 388 case ixgbe_mbox_api_16: 389 case ixgbe_mbox_api_15: 390 case ixgbe_mbox_api_14: 391 case ixgbe_mbox_api_13: 392 case ixgbe_mbox_api_12: 393 if (hw->mac.type < ixgbe_mac_X550_vf) 394 break; 395 fallthrough; 396 default: 397 return -EOPNOTSUPP; 398 } 399 400 msgbuf[0] = IXGBE_VF_GET_RSS_KEY; 401 err = ixgbevf_write_mbx(hw, msgbuf, 1); 402 403 if (err) 404 return err; 405 406 err = ixgbevf_poll_mbx(hw, msgbuf, 11); 407 408 if (err) 409 return err; 410 411 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 412 413 /* If the operation has been refused by a PF return -EPERM */ 414 if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_FAILURE)) 415 return -EPERM; 416 417 /* If we didn't get an ACK there must have been 418 * some sort of mailbox error so we should treat it 419 * as such. 420 */ 421 if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_SUCCESS)) 422 return IXGBE_ERR_MBX; 423 424 memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE); 425 426 return 0; 427 } 428 429 /** 430 * ixgbevf_set_rar_vf - set device MAC address 431 * @hw: pointer to hardware structure 432 * @index: Receive address register to write 433 * @addr: Address to put into receive address register 434 * @vmdq: Unused in this implementation 435 **/ 436 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr, 437 u32 vmdq) 438 { 439 u32 msgbuf[3]; 440 u8 *msg_addr = (u8 *)(&msgbuf[1]); 441 s32 ret_val; 442 443 memset(msgbuf, 0, sizeof(msgbuf)); 444 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR; 445 ether_addr_copy(msg_addr, addr); 446 447 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 448 ARRAY_SIZE(msgbuf)); 449 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 450 451 /* if nacked the address was rejected, use "perm_addr" */ 452 if (!ret_val && 453 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_FAILURE))) { 454 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr); 455 return IXGBE_ERR_MBX; 456 } 457 458 return ret_val; 459 } 460 461 /** 462 * ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant 463 * @hw: pointer to hardware structure 464 * @index: Receive address register to write 465 * @addr: Address to put into receive address register 466 * @vmdq: Unused in this implementation 467 * 468 * We don't really allow setting the device MAC address. However, 469 * if the address being set is the permanent MAC address we will 470 * permit that. 471 **/ 472 static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr, 473 u32 vmdq) 474 { 475 if (ether_addr_equal(addr, hw->mac.perm_addr)) 476 return 0; 477 478 return -EOPNOTSUPP; 479 } 480 481 /** 482 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses 483 * @hw: pointer to the HW structure 484 * @netdev: pointer to net device structure 485 * 486 * Updates the Multicast Table Array. 487 **/ 488 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw, 489 struct net_device *netdev) 490 { 491 struct netdev_hw_addr *ha; 492 u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; 493 u16 *vector_list = (u16 *)&msgbuf[1]; 494 u32 cnt, i; 495 496 /* Each entry in the list uses 1 16 bit word. We have 30 497 * 16 bit words available in our HW msg buffer (minus 1 for the 498 * msg type). That's 30 hash values if we pack 'em right. If 499 * there are more than 30 MC addresses to add then punt the 500 * extras for now and then add code to handle more than 30 later. 501 * It would be unusual for a server to request that many multi-cast 502 * addresses except for in large enterprise network environments. 503 */ 504 505 cnt = netdev_mc_count(netdev); 506 if (cnt > 30) 507 cnt = 30; 508 msgbuf[0] = IXGBE_VF_SET_MULTICAST; 509 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT; 510 511 i = 0; 512 netdev_for_each_mc_addr(ha, netdev) { 513 if (i == cnt) 514 break; 515 if (is_link_local_ether_addr(ha->addr)) 516 continue; 517 518 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr); 519 } 520 521 return ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 522 IXGBE_VFMAILBOX_SIZE); 523 } 524 525 /** 526 * ixgbevf_hv_update_mc_addr_list_vf - stub 527 * @hw: unused 528 * @netdev: unused 529 * 530 * Hyper-V variant - just a stub. 531 */ 532 static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw, 533 struct net_device *netdev) 534 { 535 return -EOPNOTSUPP; 536 } 537 538 /** 539 * ixgbevf_update_xcast_mode - Update Multicast mode 540 * @hw: pointer to the HW structure 541 * @xcast_mode: new multicast mode 542 * 543 * Updates the Multicast Mode of VF. 544 **/ 545 static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode) 546 { 547 u32 msgbuf[2]; 548 s32 err; 549 550 switch (hw->api_version) { 551 case ixgbe_mbox_api_12: 552 /* promisc introduced in 1.3 version */ 553 if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC) 554 return -EOPNOTSUPP; 555 fallthrough; 556 case ixgbe_mbox_api_13: 557 case ixgbe_mbox_api_14: 558 case ixgbe_mbox_api_15: 559 case ixgbe_mbox_api_16: 560 case ixgbe_mbox_api_17: 561 break; 562 default: 563 return -EOPNOTSUPP; 564 } 565 566 msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE; 567 msgbuf[1] = xcast_mode; 568 569 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 570 ARRAY_SIZE(msgbuf)); 571 if (err) 572 return err; 573 574 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 575 if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_FAILURE)) 576 return -EPERM; 577 578 return 0; 579 } 580 581 /** 582 * ixgbevf_hv_update_xcast_mode - stub 583 * @hw: unused 584 * @xcast_mode: unused 585 * 586 * Hyper-V variant - just a stub. 587 */ 588 static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode) 589 { 590 return -EOPNOTSUPP; 591 } 592 593 /** 594 * ixgbevf_get_link_state_vf - Get VF link state from PF 595 * @hw: pointer to the HW structure 596 * @link_state: link state storage 597 * 598 * Returns state of the operation error or success. 599 */ 600 static s32 ixgbevf_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state) 601 { 602 u32 msgbuf[2]; 603 s32 ret_val; 604 s32 err; 605 606 msgbuf[0] = IXGBE_VF_GET_LINK_STATE; 607 msgbuf[1] = 0x0; 608 609 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2); 610 611 if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) { 612 ret_val = IXGBE_ERR_MBX; 613 } else { 614 ret_val = 0; 615 *link_state = msgbuf[1]; 616 } 617 618 return ret_val; 619 } 620 621 /** 622 * ixgbevf_hv_get_link_state_vf - * Hyper-V variant - just a stub. 623 * @hw: unused 624 * @link_state: unused 625 * 626 * Hyper-V variant; there is no mailbox communication. 627 */ 628 static s32 ixgbevf_hv_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state) 629 { 630 return -EOPNOTSUPP; 631 } 632 633 /** 634 * ixgbevf_get_pf_link_state - Get PF's link status 635 * @hw: pointer to the HW structure 636 * @speed: link speed 637 * @link_up: indicate if link is up/down 638 * 639 * Ask PF to provide link_up state and speed of the link. 640 * 641 * Return: IXGBE_ERR_MBX in the case of mailbox error, 642 * -EOPNOTSUPP if the op is not supported or 0 on success. 643 */ 644 static int ixgbevf_get_pf_link_state(struct ixgbe_hw *hw, ixgbe_link_speed *speed, 645 bool *link_up) 646 { 647 u32 msgbuf[3] = {}; 648 int err; 649 650 switch (hw->api_version) { 651 case ixgbe_mbox_api_16: 652 case ixgbe_mbox_api_17: 653 break; 654 default: 655 return -EOPNOTSUPP; 656 } 657 658 msgbuf[0] = IXGBE_VF_GET_PF_LINK_STATE; 659 660 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 661 ARRAY_SIZE(msgbuf)); 662 if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) { 663 err = IXGBE_ERR_MBX; 664 *speed = IXGBE_LINK_SPEED_UNKNOWN; 665 /* No need to set @link_up to false as it will be done by 666 * ixgbe_check_mac_link_vf(). 667 */ 668 } else { 669 *speed = msgbuf[1]; 670 *link_up = msgbuf[2]; 671 } 672 673 return err; 674 } 675 676 /** 677 * ixgbevf_negotiate_features_vf - negotiate supported features with PF driver 678 * @hw: pointer to the HW structure 679 * @pf_features: bitmask of features supported by PF 680 * 681 * Return: IXGBE_ERR_MBX in the case of mailbox error, 682 * -EOPNOTSUPP if the op is not supported or 0 on success. 683 */ 684 static int ixgbevf_negotiate_features_vf(struct ixgbe_hw *hw, u32 *pf_features) 685 { 686 u32 msgbuf[2] = {}; 687 int err; 688 689 switch (hw->api_version) { 690 case ixgbe_mbox_api_17: 691 break; 692 default: 693 return -EOPNOTSUPP; 694 } 695 696 msgbuf[0] = IXGBE_VF_FEATURES_NEGOTIATE; 697 msgbuf[1] = IXGBEVF_SUPPORTED_FEATURES; 698 699 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 700 ARRAY_SIZE(msgbuf)); 701 702 if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) { 703 err = IXGBE_ERR_MBX; 704 *pf_features = 0x0; 705 } else { 706 *pf_features = msgbuf[1]; 707 } 708 709 return err; 710 } 711 712 static int ixgbevf_hv_negotiate_features_vf(struct ixgbe_hw *hw, 713 u32 *pf_features) 714 { 715 return -EOPNOTSUPP; 716 } 717 718 /** 719 * ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address 720 * @hw: pointer to the HW structure 721 * @vlan: 12 bit VLAN ID 722 * @vind: unused by VF drivers 723 * @vlan_on: if true then set bit, else clear bit 724 **/ 725 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind, 726 bool vlan_on) 727 { 728 u32 msgbuf[2]; 729 s32 err; 730 731 msgbuf[0] = IXGBE_VF_SET_VLAN; 732 msgbuf[1] = vlan; 733 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */ 734 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT; 735 736 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 737 ARRAY_SIZE(msgbuf)); 738 if (err) 739 goto mbx_err; 740 741 /* remove extra bits from the message */ 742 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 743 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT); 744 745 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_SUCCESS)) 746 err = IXGBE_ERR_INVALID_ARGUMENT; 747 748 mbx_err: 749 return err; 750 } 751 752 /** 753 * ixgbe_read_vflinks - Read VFLINKS register 754 * @hw: pointer to the HW structure 755 * @speed: link speed 756 * @link_up: indicate if link is up/down 757 * 758 * Get linkup status and link speed from the VFLINKS register. 759 */ 760 static void ixgbe_read_vflinks(struct ixgbe_hw *hw, ixgbe_link_speed *speed, 761 bool *link_up) 762 { 763 u32 vflinks = IXGBE_READ_REG(hw, IXGBE_VFLINKS); 764 765 /* if link status is down no point in checking to see if PF is up */ 766 if (!(vflinks & IXGBE_LINKS_UP)) { 767 *link_up = false; 768 return; 769 } 770 771 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs 772 * before the link status is correct 773 */ 774 if (hw->mac.type == ixgbe_mac_82599_vf) { 775 for (int i = 0; i < 5; i++) { 776 udelay(100); 777 vflinks = IXGBE_READ_REG(hw, IXGBE_VFLINKS); 778 779 if (!(vflinks & IXGBE_LINKS_UP)) { 780 *link_up = false; 781 return; 782 } 783 } 784 } 785 786 /* We reached this point so there's link */ 787 *link_up = true; 788 789 switch (vflinks & IXGBE_LINKS_SPEED_82599) { 790 case IXGBE_LINKS_SPEED_10G_82599: 791 *speed = IXGBE_LINK_SPEED_10GB_FULL; 792 break; 793 case IXGBE_LINKS_SPEED_1G_82599: 794 *speed = IXGBE_LINK_SPEED_1GB_FULL; 795 break; 796 case IXGBE_LINKS_SPEED_100_82599: 797 *speed = IXGBE_LINK_SPEED_100_FULL; 798 break; 799 default: 800 *speed = IXGBE_LINK_SPEED_UNKNOWN; 801 } 802 } 803 804 /** 805 * ixgbevf_hv_set_vfta_vf - * Hyper-V variant - just a stub. 806 * @hw: unused 807 * @vlan: unused 808 * @vind: unused 809 * @vlan_on: unused 810 */ 811 static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind, 812 bool vlan_on) 813 { 814 return -EOPNOTSUPP; 815 } 816 817 /** 818 * ixgbevf_setup_mac_link_vf - Setup MAC link settings 819 * @hw: pointer to hardware structure 820 * @speed: Unused in this implementation 821 * @autoneg: Unused in this implementation 822 * @autoneg_wait_to_complete: Unused in this implementation 823 * 824 * Do nothing and return success. VF drivers are not allowed to change 825 * global settings. Maintained for driver compatibility. 826 **/ 827 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw, 828 ixgbe_link_speed speed, bool autoneg, 829 bool autoneg_wait_to_complete) 830 { 831 return 0; 832 } 833 834 /** 835 * ixgbevf_check_mac_link_vf - Get link/speed status 836 * @hw: pointer to hardware structure 837 * @speed: pointer to link speed 838 * @link_up: true is link is up, false otherwise 839 * @autoneg_wait_to_complete: unused 840 * 841 * Reads the links register to determine if link is up and the current speed 842 **/ 843 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw, 844 ixgbe_link_speed *speed, 845 bool *link_up, 846 bool autoneg_wait_to_complete) 847 { 848 struct ixgbevf_adapter *adapter = hw->back; 849 struct ixgbe_mbx_info *mbx = &hw->mbx; 850 struct ixgbe_mac_info *mac = &hw->mac; 851 s32 ret_val = 0; 852 u32 in_msg = 0; 853 854 /* If we were hit with a reset drop the link */ 855 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout) 856 mac->get_link_status = true; 857 858 if (!mac->get_link_status) 859 goto out; 860 861 if (hw->mac.type == ixgbe_mac_e610_vf && 862 hw->api_version >= ixgbe_mbox_api_16) { 863 ret_val = ixgbevf_get_pf_link_state(hw, speed, link_up); 864 if (ret_val) 865 goto out; 866 } else { 867 ixgbe_read_vflinks(hw, speed, link_up); 868 if (*link_up == false) 869 goto out; 870 } 871 872 /* if the read failed it could just be a mailbox collision, best wait 873 * until we are called again and don't report an error 874 */ 875 if (mbx->ops.read(hw, &in_msg, 1)) { 876 if (adapter->pf_features & IXGBEVF_PF_SUP_ESX_MBX) 877 mac->get_link_status = false; 878 goto out; 879 } 880 881 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) { 882 /* msg is not CTS and is NACK we must have lost CTS status */ 883 if (in_msg & IXGBE_VT_MSGTYPE_FAILURE) 884 ret_val = -1; 885 goto out; 886 } 887 888 /* the pf is talking, if we timed out in the past we reinit */ 889 if (!mbx->timeout) { 890 ret_val = -1; 891 goto out; 892 } 893 894 /* if we passed all the tests above then the link is up and we no 895 * longer need to check for link 896 */ 897 mac->get_link_status = false; 898 899 out: 900 *link_up = !mac->get_link_status; 901 return ret_val; 902 } 903 904 /** 905 * ixgbevf_hv_check_mac_link_vf - check link 906 * @hw: pointer to private hardware struct 907 * @speed: pointer to link speed 908 * @link_up: true is link is up, false otherwise 909 * @autoneg_wait_to_complete: unused 910 * 911 * Hyper-V variant; there is no mailbox communication. 912 */ 913 static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw, 914 ixgbe_link_speed *speed, 915 bool *link_up, 916 bool autoneg_wait_to_complete) 917 { 918 struct ixgbe_mbx_info *mbx = &hw->mbx; 919 struct ixgbe_mac_info *mac = &hw->mac; 920 u32 links_reg; 921 922 /* If we were hit with a reset drop the link */ 923 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout) 924 mac->get_link_status = true; 925 926 if (!mac->get_link_status) 927 goto out; 928 929 /* if link status is down no point in checking to see if pf is up */ 930 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS); 931 if (!(links_reg & IXGBE_LINKS_UP)) 932 goto out; 933 934 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs 935 * before the link status is correct 936 */ 937 if (mac->type == ixgbe_mac_82599_vf) { 938 int i; 939 940 for (i = 0; i < 5; i++) { 941 udelay(100); 942 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS); 943 944 if (!(links_reg & IXGBE_LINKS_UP)) 945 goto out; 946 } 947 } 948 949 switch (links_reg & IXGBE_LINKS_SPEED_82599) { 950 case IXGBE_LINKS_SPEED_10G_82599: 951 *speed = IXGBE_LINK_SPEED_10GB_FULL; 952 break; 953 case IXGBE_LINKS_SPEED_1G_82599: 954 *speed = IXGBE_LINK_SPEED_1GB_FULL; 955 break; 956 case IXGBE_LINKS_SPEED_100_82599: 957 *speed = IXGBE_LINK_SPEED_100_FULL; 958 break; 959 } 960 961 /* if we passed all the tests above then the link is up and we no 962 * longer need to check for link 963 */ 964 mac->get_link_status = false; 965 966 out: 967 *link_up = !mac->get_link_status; 968 return 0; 969 } 970 971 /** 972 * ixgbevf_set_rlpml_vf - Set the maximum receive packet length 973 * @hw: pointer to the HW structure 974 * @max_size: value to assign to max frame size 975 **/ 976 static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) 977 { 978 u32 msgbuf[2]; 979 s32 ret_val; 980 981 msgbuf[0] = IXGBE_VF_SET_LPE; 982 msgbuf[1] = max_size; 983 984 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 985 ARRAY_SIZE(msgbuf)); 986 if (ret_val) 987 return ret_val; 988 if ((msgbuf[0] & IXGBE_VF_SET_LPE) && 989 (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) 990 return IXGBE_ERR_MBX; 991 992 return 0; 993 } 994 995 /** 996 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length 997 * @hw: pointer to the HW structure 998 * @max_size: value to assign to max frame size 999 * Hyper-V variant. 1000 **/ 1001 static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) 1002 { 1003 u32 reg; 1004 1005 /* If we are on Hyper-V, we implement this functionality 1006 * differently. 1007 */ 1008 reg = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0)); 1009 /* CRC == 4 */ 1010 reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN); 1011 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg); 1012 1013 return 0; 1014 } 1015 1016 /** 1017 * ixgbevf_negotiate_api_version_vf - Negotiate supported API version 1018 * @hw: pointer to the HW structure 1019 * @api: integer containing requested API version 1020 **/ 1021 static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api) 1022 { 1023 int err; 1024 u32 msg[3]; 1025 1026 /* Negotiate the mailbox API version */ 1027 msg[0] = IXGBE_VF_API_NEGOTIATE; 1028 msg[1] = api; 1029 msg[2] = 0; 1030 1031 err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg)); 1032 if (!err) { 1033 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS; 1034 1035 /* Store value and return 0 on success */ 1036 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | 1037 IXGBE_VT_MSGTYPE_SUCCESS)) { 1038 hw->api_version = api; 1039 return 0; 1040 } 1041 1042 err = IXGBE_ERR_INVALID_ARGUMENT; 1043 } 1044 1045 return err; 1046 } 1047 1048 /** 1049 * ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version 1050 * @hw: pointer to the HW structure 1051 * @api: integer containing requested API version 1052 * Hyper-V version - only ixgbe_mbox_api_10 supported. 1053 **/ 1054 static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api) 1055 { 1056 /* Hyper-V only supports api version ixgbe_mbox_api_10 */ 1057 if (api != ixgbe_mbox_api_10) 1058 return IXGBE_ERR_INVALID_ARGUMENT; 1059 1060 return 0; 1061 } 1062 1063 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs, 1064 unsigned int *default_tc) 1065 { 1066 int err; 1067 u32 msg[5]; 1068 1069 /* do nothing if API doesn't support ixgbevf_get_queues */ 1070 switch (hw->api_version) { 1071 case ixgbe_mbox_api_11: 1072 case ixgbe_mbox_api_12: 1073 case ixgbe_mbox_api_13: 1074 case ixgbe_mbox_api_14: 1075 case ixgbe_mbox_api_15: 1076 case ixgbe_mbox_api_16: 1077 case ixgbe_mbox_api_17: 1078 break; 1079 default: 1080 return 0; 1081 } 1082 1083 /* Fetch queue configuration from the PF */ 1084 msg[0] = IXGBE_VF_GET_QUEUE; 1085 msg[1] = msg[2] = msg[3] = msg[4] = 0; 1086 1087 err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg)); 1088 if (!err) { 1089 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS; 1090 1091 /* if we didn't get an ACK there must have been 1092 * some sort of mailbox error so we should treat it 1093 * as such 1094 */ 1095 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_SUCCESS)) 1096 return IXGBE_ERR_MBX; 1097 1098 /* record and validate values from message */ 1099 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES]; 1100 if (hw->mac.max_tx_queues == 0 || 1101 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES) 1102 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES; 1103 1104 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES]; 1105 if (hw->mac.max_rx_queues == 0 || 1106 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES) 1107 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES; 1108 1109 *num_tcs = msg[IXGBE_VF_TRANS_VLAN]; 1110 /* in case of unknown state assume we cannot tag frames */ 1111 if (*num_tcs > hw->mac.max_rx_queues) 1112 *num_tcs = 1; 1113 1114 *default_tc = msg[IXGBE_VF_DEF_QUEUE]; 1115 /* default to queue 0 on out-of-bounds queue number */ 1116 if (*default_tc >= hw->mac.max_tx_queues) 1117 *default_tc = 0; 1118 } 1119 1120 return err; 1121 } 1122 1123 static const struct ixgbe_mac_operations ixgbevf_mac_ops = { 1124 .init_hw = ixgbevf_init_hw_vf, 1125 .reset_hw = ixgbevf_reset_hw_vf, 1126 .start_hw = ixgbevf_start_hw_vf, 1127 .get_mac_addr = ixgbevf_get_mac_addr_vf, 1128 .stop_adapter = ixgbevf_stop_hw_vf, 1129 .setup_link = ixgbevf_setup_mac_link_vf, 1130 .check_link = ixgbevf_check_mac_link_vf, 1131 .negotiate_api_version = ixgbevf_negotiate_api_version_vf, 1132 .negotiate_features = ixgbevf_negotiate_features_vf, 1133 .set_rar = ixgbevf_set_rar_vf, 1134 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf, 1135 .update_xcast_mode = ixgbevf_update_xcast_mode, 1136 .get_link_state = ixgbevf_get_link_state_vf, 1137 .set_uc_addr = ixgbevf_set_uc_addr_vf, 1138 .set_vfta = ixgbevf_set_vfta_vf, 1139 .set_rlpml = ixgbevf_set_rlpml_vf, 1140 }; 1141 1142 static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = { 1143 .init_hw = ixgbevf_init_hw_vf, 1144 .reset_hw = ixgbevf_hv_reset_hw_vf, 1145 .start_hw = ixgbevf_start_hw_vf, 1146 .get_mac_addr = ixgbevf_get_mac_addr_vf, 1147 .stop_adapter = ixgbevf_stop_hw_vf, 1148 .setup_link = ixgbevf_setup_mac_link_vf, 1149 .check_link = ixgbevf_hv_check_mac_link_vf, 1150 .negotiate_api_version = ixgbevf_hv_negotiate_api_version_vf, 1151 .negotiate_features = ixgbevf_hv_negotiate_features_vf, 1152 .set_rar = ixgbevf_hv_set_rar_vf, 1153 .update_mc_addr_list = ixgbevf_hv_update_mc_addr_list_vf, 1154 .update_xcast_mode = ixgbevf_hv_update_xcast_mode, 1155 .get_link_state = ixgbevf_hv_get_link_state_vf, 1156 .set_uc_addr = ixgbevf_hv_set_uc_addr_vf, 1157 .set_vfta = ixgbevf_hv_set_vfta_vf, 1158 .set_rlpml = ixgbevf_hv_set_rlpml_vf, 1159 }; 1160 1161 const struct ixgbevf_info ixgbevf_82599_vf_info = { 1162 .mac = ixgbe_mac_82599_vf, 1163 .mac_ops = &ixgbevf_mac_ops, 1164 }; 1165 1166 const struct ixgbevf_info ixgbevf_82599_vf_hv_info = { 1167 .mac = ixgbe_mac_82599_vf, 1168 .mac_ops = &ixgbevf_hv_mac_ops, 1169 }; 1170 1171 const struct ixgbevf_info ixgbevf_X540_vf_info = { 1172 .mac = ixgbe_mac_X540_vf, 1173 .mac_ops = &ixgbevf_mac_ops, 1174 }; 1175 1176 const struct ixgbevf_info ixgbevf_X540_vf_hv_info = { 1177 .mac = ixgbe_mac_X540_vf, 1178 .mac_ops = &ixgbevf_hv_mac_ops, 1179 }; 1180 1181 const struct ixgbevf_info ixgbevf_X550_vf_info = { 1182 .mac = ixgbe_mac_X550_vf, 1183 .mac_ops = &ixgbevf_mac_ops, 1184 }; 1185 1186 const struct ixgbevf_info ixgbevf_X550_vf_hv_info = { 1187 .mac = ixgbe_mac_X550_vf, 1188 .mac_ops = &ixgbevf_hv_mac_ops, 1189 }; 1190 1191 const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = { 1192 .mac = ixgbe_mac_X550EM_x_vf, 1193 .mac_ops = &ixgbevf_mac_ops, 1194 }; 1195 1196 const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = { 1197 .mac = ixgbe_mac_X550EM_x_vf, 1198 .mac_ops = &ixgbevf_hv_mac_ops, 1199 }; 1200 1201 const struct ixgbevf_info ixgbevf_x550em_a_vf_info = { 1202 .mac = ixgbe_mac_x550em_a_vf, 1203 .mac_ops = &ixgbevf_mac_ops, 1204 }; 1205 1206 const struct ixgbevf_info ixgbevf_e610_vf_info = { 1207 .mac = ixgbe_mac_e610_vf, 1208 .mac_ops = &ixgbevf_mac_ops, 1209 }; 1210 1211 const struct ixgbevf_info ixgbevf_e610_vf_hv_info = { 1212 .mac = ixgbe_mac_e610_vf, 1213 .mac_ops = &ixgbevf_hv_mac_ops, 1214 }; 1215