1 /******************************************************************************* 2 3 Intel 82599 Virtual Function driver 4 Copyright(c) 1999 - 2012 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, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 26 *******************************************************************************/ 27 28 #include "vf.h" 29 #include "ixgbevf.h" 30 31 /** 32 * ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx 33 * @hw: pointer to hardware structure 34 * 35 * Starts the hardware by filling the bus info structure and media type, clears 36 * all on chip counters, initializes receive address registers, multicast 37 * table, VLAN filter table, calls routine to set up link and flow control 38 * settings, and leaves transmit and receive units disabled and uninitialized 39 **/ 40 static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw) 41 { 42 /* Clear adapter stopped flag */ 43 hw->adapter_stopped = false; 44 45 return 0; 46 } 47 48 /** 49 * ixgbevf_init_hw_vf - virtual function hardware initialization 50 * @hw: pointer to hardware structure 51 * 52 * Initialize the hardware by resetting the hardware and then starting 53 * the hardware 54 **/ 55 static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw) 56 { 57 s32 status = hw->mac.ops.start_hw(hw); 58 59 hw->mac.ops.get_mac_addr(hw, hw->mac.addr); 60 61 return status; 62 } 63 64 /** 65 * ixgbevf_reset_hw_vf - Performs hardware reset 66 * @hw: pointer to hardware structure 67 * 68 * Resets the hardware by reseting the transmit and receive units, masks and 69 * clears all interrupts. 70 **/ 71 static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw) 72 { 73 struct ixgbe_mbx_info *mbx = &hw->mbx; 74 u32 timeout = IXGBE_VF_INIT_TIMEOUT; 75 s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR; 76 u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN]; 77 u8 *addr = (u8 *)(&msgbuf[1]); 78 79 /* Call adapter stop to disable tx/rx and clear interrupts */ 80 hw->mac.ops.stop_adapter(hw); 81 82 /* reset the api version */ 83 hw->api_version = ixgbe_mbox_api_10; 84 85 IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST); 86 IXGBE_WRITE_FLUSH(hw); 87 88 /* we cannot reset while the RSTI / RSTD bits are asserted */ 89 while (!mbx->ops.check_for_rst(hw) && timeout) { 90 timeout--; 91 udelay(5); 92 } 93 94 if (!timeout) 95 return IXGBE_ERR_RESET_FAILED; 96 97 /* mailbox timeout can now become active */ 98 mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT; 99 100 msgbuf[0] = IXGBE_VF_RESET; 101 mbx->ops.write_posted(hw, msgbuf, 1); 102 103 mdelay(10); 104 105 /* set our "perm_addr" based on info provided by PF */ 106 /* also set up the mc_filter_type which is piggy backed 107 * on the mac address in word 3 */ 108 ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN); 109 if (ret_val) 110 return ret_val; 111 112 if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK)) 113 return IXGBE_ERR_INVALID_MAC_ADDR; 114 115 memcpy(hw->mac.perm_addr, addr, ETH_ALEN); 116 hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD]; 117 118 return 0; 119 } 120 121 /** 122 * ixgbevf_stop_hw_vf - Generic stop Tx/Rx units 123 * @hw: pointer to hardware structure 124 * 125 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts, 126 * disables transmit and receive units. The adapter_stopped flag is used by 127 * the shared code and drivers to determine if the adapter is in a stopped 128 * state and should not touch the hardware. 129 **/ 130 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw) 131 { 132 u32 number_of_queues; 133 u32 reg_val; 134 u16 i; 135 136 /* 137 * Set the adapter_stopped flag so other driver functions stop touching 138 * the hardware 139 */ 140 hw->adapter_stopped = true; 141 142 /* Disable the receive unit by stopped each queue */ 143 number_of_queues = hw->mac.max_rx_queues; 144 for (i = 0; i < number_of_queues; i++) { 145 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i)); 146 if (reg_val & IXGBE_RXDCTL_ENABLE) { 147 reg_val &= ~IXGBE_RXDCTL_ENABLE; 148 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val); 149 } 150 } 151 152 IXGBE_WRITE_FLUSH(hw); 153 154 /* Clear interrupt mask to stop from interrupts being generated */ 155 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK); 156 157 /* Clear any pending interrupts */ 158 IXGBE_READ_REG(hw, IXGBE_VTEICR); 159 160 /* Disable the transmit unit. Each queue must be disabled. */ 161 number_of_queues = hw->mac.max_tx_queues; 162 for (i = 0; i < number_of_queues; i++) { 163 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i)); 164 if (reg_val & IXGBE_TXDCTL_ENABLE) { 165 reg_val &= ~IXGBE_TXDCTL_ENABLE; 166 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val); 167 } 168 } 169 170 return 0; 171 } 172 173 /** 174 * ixgbevf_mta_vector - Determines bit-vector in multicast table to set 175 * @hw: pointer to hardware structure 176 * @mc_addr: the multicast address 177 * 178 * Extracts the 12 bits, from a multicast address, to determine which 179 * bit-vector to set in the multicast table. The hardware uses 12 bits, from 180 * incoming rx multicast addresses, to determine the bit-vector to check in 181 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set 182 * by the MO field of the MCSTCTRL. The MO field is set during initialization 183 * to mc_filter_type. 184 **/ 185 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr) 186 { 187 u32 vector = 0; 188 189 switch (hw->mac.mc_filter_type) { 190 case 0: /* use bits [47:36] of the address */ 191 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4)); 192 break; 193 case 1: /* use bits [46:35] of the address */ 194 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5)); 195 break; 196 case 2: /* use bits [45:34] of the address */ 197 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6)); 198 break; 199 case 3: /* use bits [43:32] of the address */ 200 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8)); 201 break; 202 default: /* Invalid mc_filter_type */ 203 break; 204 } 205 206 /* vector can only be 12-bits or boundary will be exceeded */ 207 vector &= 0xFFF; 208 return vector; 209 } 210 211 /** 212 * ixgbevf_get_mac_addr_vf - Read device MAC address 213 * @hw: pointer to the HW structure 214 * @mac_addr: pointer to storage for retrieved MAC address 215 **/ 216 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr) 217 { 218 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN); 219 220 return 0; 221 } 222 223 static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr) 224 { 225 struct ixgbe_mbx_info *mbx = &hw->mbx; 226 u32 msgbuf[3]; 227 u8 *msg_addr = (u8 *)(&msgbuf[1]); 228 s32 ret_val; 229 230 memset(msgbuf, 0, sizeof(msgbuf)); 231 /* 232 * If index is one then this is the start of a new list and needs 233 * indication to the PF so it can do it's own list management. 234 * If it is zero then that tells the PF to just clear all of 235 * this VF's macvlans and there is no new list. 236 */ 237 msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT; 238 msgbuf[0] |= IXGBE_VF_SET_MACVLAN; 239 if (addr) 240 memcpy(msg_addr, addr, 6); 241 ret_val = mbx->ops.write_posted(hw, msgbuf, 3); 242 243 if (!ret_val) 244 ret_val = mbx->ops.read_posted(hw, msgbuf, 3); 245 246 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 247 248 if (!ret_val) 249 if (msgbuf[0] == 250 (IXGBE_VF_SET_MACVLAN | IXGBE_VT_MSGTYPE_NACK)) 251 ret_val = -ENOMEM; 252 253 return ret_val; 254 } 255 256 /** 257 * ixgbevf_set_rar_vf - set device MAC address 258 * @hw: pointer to hardware structure 259 * @index: Receive address register to write 260 * @addr: Address to put into receive address register 261 * @vmdq: Unused in this implementation 262 **/ 263 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr, 264 u32 vmdq) 265 { 266 struct ixgbe_mbx_info *mbx = &hw->mbx; 267 u32 msgbuf[3]; 268 u8 *msg_addr = (u8 *)(&msgbuf[1]); 269 s32 ret_val; 270 271 memset(msgbuf, 0, sizeof(msgbuf)); 272 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR; 273 memcpy(msg_addr, addr, 6); 274 ret_val = mbx->ops.write_posted(hw, msgbuf, 3); 275 276 if (!ret_val) 277 ret_val = mbx->ops.read_posted(hw, msgbuf, 3); 278 279 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 280 281 /* if nacked the address was rejected, use "perm_addr" */ 282 if (!ret_val && 283 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) 284 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr); 285 286 return ret_val; 287 } 288 289 static void ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, 290 u32 *msg, u16 size) 291 { 292 struct ixgbe_mbx_info *mbx = &hw->mbx; 293 u32 retmsg[IXGBE_VFMAILBOX_SIZE]; 294 s32 retval = mbx->ops.write_posted(hw, msg, size); 295 296 if (!retval) 297 mbx->ops.read_posted(hw, retmsg, size); 298 } 299 300 /** 301 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses 302 * @hw: pointer to the HW structure 303 * @netdev: pointer to net device structure 304 * 305 * Updates the Multicast Table Array. 306 **/ 307 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw, 308 struct net_device *netdev) 309 { 310 struct netdev_hw_addr *ha; 311 u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; 312 u16 *vector_list = (u16 *)&msgbuf[1]; 313 u32 cnt, i; 314 315 /* Each entry in the list uses 1 16 bit word. We have 30 316 * 16 bit words available in our HW msg buffer (minus 1 for the 317 * msg type). That's 30 hash values if we pack 'em right. If 318 * there are more than 30 MC addresses to add then punt the 319 * extras for now and then add code to handle more than 30 later. 320 * It would be unusual for a server to request that many multi-cast 321 * addresses except for in large enterprise network environments. 322 */ 323 324 cnt = netdev_mc_count(netdev); 325 if (cnt > 30) 326 cnt = 30; 327 msgbuf[0] = IXGBE_VF_SET_MULTICAST; 328 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT; 329 330 i = 0; 331 netdev_for_each_mc_addr(ha, netdev) { 332 if (i == cnt) 333 break; 334 if (is_link_local_ether_addr(ha->addr)) 335 continue; 336 337 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr); 338 } 339 340 ixgbevf_write_msg_read_ack(hw, msgbuf, IXGBE_VFMAILBOX_SIZE); 341 342 return 0; 343 } 344 345 /** 346 * ixgbevf_set_vfta_vf - Set/Unset vlan filter table address 347 * @hw: pointer to the HW structure 348 * @vlan: 12 bit VLAN ID 349 * @vind: unused by VF drivers 350 * @vlan_on: if true then set bit, else clear bit 351 **/ 352 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind, 353 bool vlan_on) 354 { 355 struct ixgbe_mbx_info *mbx = &hw->mbx; 356 u32 msgbuf[2]; 357 s32 err; 358 359 msgbuf[0] = IXGBE_VF_SET_VLAN; 360 msgbuf[1] = vlan; 361 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */ 362 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT; 363 364 err = mbx->ops.write_posted(hw, msgbuf, 2); 365 if (err) 366 goto mbx_err; 367 368 err = mbx->ops.read_posted(hw, msgbuf, 2); 369 if (err) 370 goto mbx_err; 371 372 /* remove extra bits from the message */ 373 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 374 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT); 375 376 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK)) 377 err = IXGBE_ERR_INVALID_ARGUMENT; 378 379 mbx_err: 380 return err; 381 } 382 383 /** 384 * ixgbevf_setup_mac_link_vf - Setup MAC link settings 385 * @hw: pointer to hardware structure 386 * @speed: Unused in this implementation 387 * @autoneg: Unused in this implementation 388 * @autoneg_wait_to_complete: Unused in this implementation 389 * 390 * Do nothing and return success. VF drivers are not allowed to change 391 * global settings. Maintained for driver compatibility. 392 **/ 393 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw, 394 ixgbe_link_speed speed, bool autoneg, 395 bool autoneg_wait_to_complete) 396 { 397 return 0; 398 } 399 400 /** 401 * ixgbevf_check_mac_link_vf - Get link/speed status 402 * @hw: pointer to hardware structure 403 * @speed: pointer to link speed 404 * @link_up: true is link is up, false otherwise 405 * @autoneg_wait_to_complete: true when waiting for completion is needed 406 * 407 * Reads the links register to determine if link is up and the current speed 408 **/ 409 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw, 410 ixgbe_link_speed *speed, 411 bool *link_up, 412 bool autoneg_wait_to_complete) 413 { 414 struct ixgbe_mbx_info *mbx = &hw->mbx; 415 struct ixgbe_mac_info *mac = &hw->mac; 416 s32 ret_val = 0; 417 u32 links_reg; 418 u32 in_msg = 0; 419 420 /* If we were hit with a reset drop the link */ 421 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout) 422 mac->get_link_status = true; 423 424 if (!mac->get_link_status) 425 goto out; 426 427 /* if link status is down no point in checking to see if pf is up */ 428 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS); 429 if (!(links_reg & IXGBE_LINKS_UP)) 430 goto out; 431 432 switch (links_reg & IXGBE_LINKS_SPEED_82599) { 433 case IXGBE_LINKS_SPEED_10G_82599: 434 *speed = IXGBE_LINK_SPEED_10GB_FULL; 435 break; 436 case IXGBE_LINKS_SPEED_1G_82599: 437 *speed = IXGBE_LINK_SPEED_1GB_FULL; 438 break; 439 case IXGBE_LINKS_SPEED_100_82599: 440 *speed = IXGBE_LINK_SPEED_100_FULL; 441 break; 442 } 443 444 /* if the read failed it could just be a mailbox collision, best wait 445 * until we are called again and don't report an error */ 446 if (mbx->ops.read(hw, &in_msg, 1)) 447 goto out; 448 449 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) { 450 /* msg is not CTS and is NACK we must have lost CTS status */ 451 if (in_msg & IXGBE_VT_MSGTYPE_NACK) 452 ret_val = -1; 453 goto out; 454 } 455 456 /* the pf is talking, if we timed out in the past we reinit */ 457 if (!mbx->timeout) { 458 ret_val = -1; 459 goto out; 460 } 461 462 /* if we passed all the tests above then the link is up and we no 463 * longer need to check for link */ 464 mac->get_link_status = false; 465 466 out: 467 *link_up = !mac->get_link_status; 468 return ret_val; 469 } 470 471 /** 472 * ixgbevf_rlpml_set_vf - Set the maximum receive packet length 473 * @hw: pointer to the HW structure 474 * @max_size: value to assign to max frame size 475 **/ 476 void ixgbevf_rlpml_set_vf(struct ixgbe_hw *hw, u16 max_size) 477 { 478 u32 msgbuf[2]; 479 480 msgbuf[0] = IXGBE_VF_SET_LPE; 481 msgbuf[1] = max_size; 482 ixgbevf_write_msg_read_ack(hw, msgbuf, 2); 483 } 484 485 /** 486 * ixgbevf_negotiate_api_version - Negotiate supported API version 487 * @hw: pointer to the HW structure 488 * @api: integer containing requested API version 489 **/ 490 int ixgbevf_negotiate_api_version(struct ixgbe_hw *hw, int api) 491 { 492 int err; 493 u32 msg[3]; 494 495 /* Negotiate the mailbox API version */ 496 msg[0] = IXGBE_VF_API_NEGOTIATE; 497 msg[1] = api; 498 msg[2] = 0; 499 err = hw->mbx.ops.write_posted(hw, msg, 3); 500 501 if (!err) 502 err = hw->mbx.ops.read_posted(hw, msg, 3); 503 504 if (!err) { 505 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS; 506 507 /* Store value and return 0 on success */ 508 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) { 509 hw->api_version = api; 510 return 0; 511 } 512 513 err = IXGBE_ERR_INVALID_ARGUMENT; 514 } 515 516 return err; 517 } 518 519 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs, 520 unsigned int *default_tc) 521 { 522 int err; 523 u32 msg[5]; 524 525 /* do nothing if API doesn't support ixgbevf_get_queues */ 526 switch (hw->api_version) { 527 case ixgbe_mbox_api_11: 528 break; 529 default: 530 return 0; 531 } 532 533 /* Fetch queue configuration from the PF */ 534 msg[0] = IXGBE_VF_GET_QUEUE; 535 msg[1] = msg[2] = msg[3] = msg[4] = 0; 536 err = hw->mbx.ops.write_posted(hw, msg, 5); 537 538 if (!err) 539 err = hw->mbx.ops.read_posted(hw, msg, 5); 540 541 if (!err) { 542 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS; 543 544 /* 545 * if we we didn't get an ACK there must have been 546 * some sort of mailbox error so we should treat it 547 * as such 548 */ 549 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK)) 550 return IXGBE_ERR_MBX; 551 552 /* record and validate values from message */ 553 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES]; 554 if (hw->mac.max_tx_queues == 0 || 555 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES) 556 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES; 557 558 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES]; 559 if (hw->mac.max_rx_queues == 0 || 560 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES) 561 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES; 562 563 *num_tcs = msg[IXGBE_VF_TRANS_VLAN]; 564 /* in case of unknown state assume we cannot tag frames */ 565 if (*num_tcs > hw->mac.max_rx_queues) 566 *num_tcs = 1; 567 568 *default_tc = msg[IXGBE_VF_DEF_QUEUE]; 569 /* default to queue 0 on out-of-bounds queue number */ 570 if (*default_tc >= hw->mac.max_tx_queues) 571 *default_tc = 0; 572 } 573 574 return err; 575 } 576 577 static const struct ixgbe_mac_operations ixgbevf_mac_ops = { 578 .init_hw = ixgbevf_init_hw_vf, 579 .reset_hw = ixgbevf_reset_hw_vf, 580 .start_hw = ixgbevf_start_hw_vf, 581 .get_mac_addr = ixgbevf_get_mac_addr_vf, 582 .stop_adapter = ixgbevf_stop_hw_vf, 583 .setup_link = ixgbevf_setup_mac_link_vf, 584 .check_link = ixgbevf_check_mac_link_vf, 585 .set_rar = ixgbevf_set_rar_vf, 586 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf, 587 .set_uc_addr = ixgbevf_set_uc_addr_vf, 588 .set_vfta = ixgbevf_set_vfta_vf, 589 }; 590 591 const struct ixgbevf_info ixgbevf_82599_vf_info = { 592 .mac = ixgbe_mac_82599_vf, 593 .mac_ops = &ixgbevf_mac_ops, 594 }; 595 596 const struct ixgbevf_info ixgbevf_X540_vf_info = { 597 .mac = ixgbe_mac_X540_vf, 598 .mac_ops = &ixgbevf_mac_ops, 599 }; 600