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 /* New versions of the PF may NACK the reset return message 113 * to indicate that no MAC address has yet been assigned for 114 * the VF. 115 */ 116 if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK) && 117 msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_NACK)) 118 return IXGBE_ERR_INVALID_MAC_ADDR; 119 120 memcpy(hw->mac.perm_addr, addr, ETH_ALEN); 121 hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD]; 122 123 return 0; 124 } 125 126 /** 127 * ixgbevf_stop_hw_vf - Generic stop Tx/Rx units 128 * @hw: pointer to hardware structure 129 * 130 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts, 131 * disables transmit and receive units. The adapter_stopped flag is used by 132 * the shared code and drivers to determine if the adapter is in a stopped 133 * state and should not touch the hardware. 134 **/ 135 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw) 136 { 137 u32 number_of_queues; 138 u32 reg_val; 139 u16 i; 140 141 /* 142 * Set the adapter_stopped flag so other driver functions stop touching 143 * the hardware 144 */ 145 hw->adapter_stopped = true; 146 147 /* Disable the receive unit by stopped each queue */ 148 number_of_queues = hw->mac.max_rx_queues; 149 for (i = 0; i < number_of_queues; i++) { 150 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i)); 151 if (reg_val & IXGBE_RXDCTL_ENABLE) { 152 reg_val &= ~IXGBE_RXDCTL_ENABLE; 153 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val); 154 } 155 } 156 157 IXGBE_WRITE_FLUSH(hw); 158 159 /* Clear interrupt mask to stop from interrupts being generated */ 160 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK); 161 162 /* Clear any pending interrupts */ 163 IXGBE_READ_REG(hw, IXGBE_VTEICR); 164 165 /* Disable the transmit unit. Each queue must be disabled. */ 166 number_of_queues = hw->mac.max_tx_queues; 167 for (i = 0; i < number_of_queues; i++) { 168 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i)); 169 if (reg_val & IXGBE_TXDCTL_ENABLE) { 170 reg_val &= ~IXGBE_TXDCTL_ENABLE; 171 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val); 172 } 173 } 174 175 return 0; 176 } 177 178 /** 179 * ixgbevf_mta_vector - Determines bit-vector in multicast table to set 180 * @hw: pointer to hardware structure 181 * @mc_addr: the multicast address 182 * 183 * Extracts the 12 bits, from a multicast address, to determine which 184 * bit-vector to set in the multicast table. The hardware uses 12 bits, from 185 * incoming rx multicast addresses, to determine the bit-vector to check in 186 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set 187 * by the MO field of the MCSTCTRL. The MO field is set during initialization 188 * to mc_filter_type. 189 **/ 190 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr) 191 { 192 u32 vector = 0; 193 194 switch (hw->mac.mc_filter_type) { 195 case 0: /* use bits [47:36] of the address */ 196 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4)); 197 break; 198 case 1: /* use bits [46:35] of the address */ 199 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5)); 200 break; 201 case 2: /* use bits [45:34] of the address */ 202 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6)); 203 break; 204 case 3: /* use bits [43:32] of the address */ 205 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8)); 206 break; 207 default: /* Invalid mc_filter_type */ 208 break; 209 } 210 211 /* vector can only be 12-bits or boundary will be exceeded */ 212 vector &= 0xFFF; 213 return vector; 214 } 215 216 /** 217 * ixgbevf_get_mac_addr_vf - Read device MAC address 218 * @hw: pointer to the HW structure 219 * @mac_addr: pointer to storage for retrieved MAC address 220 **/ 221 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr) 222 { 223 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN); 224 225 return 0; 226 } 227 228 static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr) 229 { 230 struct ixgbe_mbx_info *mbx = &hw->mbx; 231 u32 msgbuf[3]; 232 u8 *msg_addr = (u8 *)(&msgbuf[1]); 233 s32 ret_val; 234 235 memset(msgbuf, 0, sizeof(msgbuf)); 236 /* 237 * If index is one then this is the start of a new list and needs 238 * indication to the PF so it can do it's own list management. 239 * If it is zero then that tells the PF to just clear all of 240 * this VF's macvlans and there is no new list. 241 */ 242 msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT; 243 msgbuf[0] |= IXGBE_VF_SET_MACVLAN; 244 if (addr) 245 memcpy(msg_addr, addr, ETH_ALEN); 246 ret_val = mbx->ops.write_posted(hw, msgbuf, 3); 247 248 if (!ret_val) 249 ret_val = mbx->ops.read_posted(hw, msgbuf, 3); 250 251 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 252 253 if (!ret_val) 254 if (msgbuf[0] == 255 (IXGBE_VF_SET_MACVLAN | IXGBE_VT_MSGTYPE_NACK)) 256 ret_val = -ENOMEM; 257 258 return ret_val; 259 } 260 261 /** 262 * ixgbevf_set_rar_vf - set device MAC address 263 * @hw: pointer to hardware structure 264 * @index: Receive address register to write 265 * @addr: Address to put into receive address register 266 * @vmdq: Unused in this implementation 267 **/ 268 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr, 269 u32 vmdq) 270 { 271 struct ixgbe_mbx_info *mbx = &hw->mbx; 272 u32 msgbuf[3]; 273 u8 *msg_addr = (u8 *)(&msgbuf[1]); 274 s32 ret_val; 275 276 memset(msgbuf, 0, sizeof(msgbuf)); 277 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR; 278 memcpy(msg_addr, addr, ETH_ALEN); 279 ret_val = mbx->ops.write_posted(hw, msgbuf, 3); 280 281 if (!ret_val) 282 ret_val = mbx->ops.read_posted(hw, msgbuf, 3); 283 284 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 285 286 /* if nacked the address was rejected, use "perm_addr" */ 287 if (!ret_val && 288 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) 289 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr); 290 291 return ret_val; 292 } 293 294 static void ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, 295 u32 *msg, u16 size) 296 { 297 struct ixgbe_mbx_info *mbx = &hw->mbx; 298 u32 retmsg[IXGBE_VFMAILBOX_SIZE]; 299 s32 retval = mbx->ops.write_posted(hw, msg, size); 300 301 if (!retval) 302 mbx->ops.read_posted(hw, retmsg, size); 303 } 304 305 /** 306 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses 307 * @hw: pointer to the HW structure 308 * @netdev: pointer to net device structure 309 * 310 * Updates the Multicast Table Array. 311 **/ 312 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw, 313 struct net_device *netdev) 314 { 315 struct netdev_hw_addr *ha; 316 u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; 317 u16 *vector_list = (u16 *)&msgbuf[1]; 318 u32 cnt, i; 319 320 /* Each entry in the list uses 1 16 bit word. We have 30 321 * 16 bit words available in our HW msg buffer (minus 1 for the 322 * msg type). That's 30 hash values if we pack 'em right. If 323 * there are more than 30 MC addresses to add then punt the 324 * extras for now and then add code to handle more than 30 later. 325 * It would be unusual for a server to request that many multi-cast 326 * addresses except for in large enterprise network environments. 327 */ 328 329 cnt = netdev_mc_count(netdev); 330 if (cnt > 30) 331 cnt = 30; 332 msgbuf[0] = IXGBE_VF_SET_MULTICAST; 333 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT; 334 335 i = 0; 336 netdev_for_each_mc_addr(ha, netdev) { 337 if (i == cnt) 338 break; 339 if (is_link_local_ether_addr(ha->addr)) 340 continue; 341 342 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr); 343 } 344 345 ixgbevf_write_msg_read_ack(hw, msgbuf, IXGBE_VFMAILBOX_SIZE); 346 347 return 0; 348 } 349 350 /** 351 * ixgbevf_set_vfta_vf - Set/Unset vlan filter table address 352 * @hw: pointer to the HW structure 353 * @vlan: 12 bit VLAN ID 354 * @vind: unused by VF drivers 355 * @vlan_on: if true then set bit, else clear bit 356 **/ 357 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind, 358 bool vlan_on) 359 { 360 struct ixgbe_mbx_info *mbx = &hw->mbx; 361 u32 msgbuf[2]; 362 s32 err; 363 364 msgbuf[0] = IXGBE_VF_SET_VLAN; 365 msgbuf[1] = vlan; 366 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */ 367 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT; 368 369 err = mbx->ops.write_posted(hw, msgbuf, 2); 370 if (err) 371 goto mbx_err; 372 373 err = mbx->ops.read_posted(hw, msgbuf, 2); 374 if (err) 375 goto mbx_err; 376 377 /* remove extra bits from the message */ 378 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; 379 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT); 380 381 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK)) 382 err = IXGBE_ERR_INVALID_ARGUMENT; 383 384 mbx_err: 385 return err; 386 } 387 388 /** 389 * ixgbevf_setup_mac_link_vf - Setup MAC link settings 390 * @hw: pointer to hardware structure 391 * @speed: Unused in this implementation 392 * @autoneg: Unused in this implementation 393 * @autoneg_wait_to_complete: Unused in this implementation 394 * 395 * Do nothing and return success. VF drivers are not allowed to change 396 * global settings. Maintained for driver compatibility. 397 **/ 398 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw, 399 ixgbe_link_speed speed, bool autoneg, 400 bool autoneg_wait_to_complete) 401 { 402 return 0; 403 } 404 405 /** 406 * ixgbevf_check_mac_link_vf - Get link/speed status 407 * @hw: pointer to hardware structure 408 * @speed: pointer to link speed 409 * @link_up: true is link is up, false otherwise 410 * @autoneg_wait_to_complete: true when waiting for completion is needed 411 * 412 * Reads the links register to determine if link is up and the current speed 413 **/ 414 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw, 415 ixgbe_link_speed *speed, 416 bool *link_up, 417 bool autoneg_wait_to_complete) 418 { 419 struct ixgbe_mbx_info *mbx = &hw->mbx; 420 struct ixgbe_mac_info *mac = &hw->mac; 421 s32 ret_val = 0; 422 u32 links_reg; 423 u32 in_msg = 0; 424 425 /* If we were hit with a reset drop the link */ 426 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout) 427 mac->get_link_status = true; 428 429 if (!mac->get_link_status) 430 goto out; 431 432 /* if link status is down no point in checking to see if pf is up */ 433 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS); 434 if (!(links_reg & IXGBE_LINKS_UP)) 435 goto out; 436 437 switch (links_reg & IXGBE_LINKS_SPEED_82599) { 438 case IXGBE_LINKS_SPEED_10G_82599: 439 *speed = IXGBE_LINK_SPEED_10GB_FULL; 440 break; 441 case IXGBE_LINKS_SPEED_1G_82599: 442 *speed = IXGBE_LINK_SPEED_1GB_FULL; 443 break; 444 case IXGBE_LINKS_SPEED_100_82599: 445 *speed = IXGBE_LINK_SPEED_100_FULL; 446 break; 447 } 448 449 /* if the read failed it could just be a mailbox collision, best wait 450 * until we are called again and don't report an error */ 451 if (mbx->ops.read(hw, &in_msg, 1)) 452 goto out; 453 454 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) { 455 /* msg is not CTS and is NACK we must have lost CTS status */ 456 if (in_msg & IXGBE_VT_MSGTYPE_NACK) 457 ret_val = -1; 458 goto out; 459 } 460 461 /* the pf is talking, if we timed out in the past we reinit */ 462 if (!mbx->timeout) { 463 ret_val = -1; 464 goto out; 465 } 466 467 /* if we passed all the tests above then the link is up and we no 468 * longer need to check for link */ 469 mac->get_link_status = false; 470 471 out: 472 *link_up = !mac->get_link_status; 473 return ret_val; 474 } 475 476 /** 477 * ixgbevf_rlpml_set_vf - Set the maximum receive packet length 478 * @hw: pointer to the HW structure 479 * @max_size: value to assign to max frame size 480 **/ 481 void ixgbevf_rlpml_set_vf(struct ixgbe_hw *hw, u16 max_size) 482 { 483 u32 msgbuf[2]; 484 485 msgbuf[0] = IXGBE_VF_SET_LPE; 486 msgbuf[1] = max_size; 487 ixgbevf_write_msg_read_ack(hw, msgbuf, 2); 488 } 489 490 /** 491 * ixgbevf_negotiate_api_version - Negotiate supported API version 492 * @hw: pointer to the HW structure 493 * @api: integer containing requested API version 494 **/ 495 int ixgbevf_negotiate_api_version(struct ixgbe_hw *hw, int api) 496 { 497 int err; 498 u32 msg[3]; 499 500 /* Negotiate the mailbox API version */ 501 msg[0] = IXGBE_VF_API_NEGOTIATE; 502 msg[1] = api; 503 msg[2] = 0; 504 err = hw->mbx.ops.write_posted(hw, msg, 3); 505 506 if (!err) 507 err = hw->mbx.ops.read_posted(hw, msg, 3); 508 509 if (!err) { 510 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS; 511 512 /* Store value and return 0 on success */ 513 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) { 514 hw->api_version = api; 515 return 0; 516 } 517 518 err = IXGBE_ERR_INVALID_ARGUMENT; 519 } 520 521 return err; 522 } 523 524 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs, 525 unsigned int *default_tc) 526 { 527 int err; 528 u32 msg[5]; 529 530 /* do nothing if API doesn't support ixgbevf_get_queues */ 531 switch (hw->api_version) { 532 case ixgbe_mbox_api_11: 533 break; 534 default: 535 return 0; 536 } 537 538 /* Fetch queue configuration from the PF */ 539 msg[0] = IXGBE_VF_GET_QUEUE; 540 msg[1] = msg[2] = msg[3] = msg[4] = 0; 541 err = hw->mbx.ops.write_posted(hw, msg, 5); 542 543 if (!err) 544 err = hw->mbx.ops.read_posted(hw, msg, 5); 545 546 if (!err) { 547 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS; 548 549 /* 550 * if we we didn't get an ACK there must have been 551 * some sort of mailbox error so we should treat it 552 * as such 553 */ 554 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK)) 555 return IXGBE_ERR_MBX; 556 557 /* record and validate values from message */ 558 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES]; 559 if (hw->mac.max_tx_queues == 0 || 560 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES) 561 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES; 562 563 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES]; 564 if (hw->mac.max_rx_queues == 0 || 565 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES) 566 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES; 567 568 *num_tcs = msg[IXGBE_VF_TRANS_VLAN]; 569 /* in case of unknown state assume we cannot tag frames */ 570 if (*num_tcs > hw->mac.max_rx_queues) 571 *num_tcs = 1; 572 573 *default_tc = msg[IXGBE_VF_DEF_QUEUE]; 574 /* default to queue 0 on out-of-bounds queue number */ 575 if (*default_tc >= hw->mac.max_tx_queues) 576 *default_tc = 0; 577 } 578 579 return err; 580 } 581 582 static const struct ixgbe_mac_operations ixgbevf_mac_ops = { 583 .init_hw = ixgbevf_init_hw_vf, 584 .reset_hw = ixgbevf_reset_hw_vf, 585 .start_hw = ixgbevf_start_hw_vf, 586 .get_mac_addr = ixgbevf_get_mac_addr_vf, 587 .stop_adapter = ixgbevf_stop_hw_vf, 588 .setup_link = ixgbevf_setup_mac_link_vf, 589 .check_link = ixgbevf_check_mac_link_vf, 590 .set_rar = ixgbevf_set_rar_vf, 591 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf, 592 .set_uc_addr = ixgbevf_set_uc_addr_vf, 593 .set_vfta = ixgbevf_set_vfta_vf, 594 }; 595 596 const struct ixgbevf_info ixgbevf_82599_vf_info = { 597 .mac = ixgbe_mac_82599_vf, 598 .mac_ops = &ixgbevf_mac_ops, 599 }; 600 601 const struct ixgbevf_info ixgbevf_X540_vf_info = { 602 .mac = ixgbe_mac_X540_vf, 603 .mac_ops = &ixgbevf_mac_ops, 604 }; 605