1 /****************************************************************************** 2 3 Copyright (c) 2001-2015, Intel Corporation 4 All rights reserved. 5 6 Redistribution and use in source and binary forms, with or without 7 modification, are permitted provided that the following conditions are met: 8 9 1. Redistributions of source code must retain the above copyright notice, 10 this list of conditions and the following disclaimer. 11 12 2. Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions and the following disclaimer in the 14 documentation and/or other materials provided with the distribution. 15 16 3. Neither the name of the Intel Corporation nor the names of its 17 contributors may be used to endorse or promote products derived from 18 this software without specific prior written permission. 19 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 POSSIBILITY OF SUCH DAMAGE. 31 32 ******************************************************************************/ 33 /*$FreeBSD$*/ 34 35 #include "e1000_mbx.h" 36 37 /** 38 * e1000_null_mbx_check_for_flag - No-op function, return 0 39 * @hw: pointer to the HW structure 40 **/ 41 static s32 e1000_null_mbx_check_for_flag(struct e1000_hw E1000_UNUSEDARG *hw, 42 u16 E1000_UNUSEDARG mbx_id) 43 { 44 DEBUGFUNC("e1000_null_mbx_check_flag"); 45 46 return E1000_SUCCESS; 47 } 48 49 /** 50 * e1000_null_mbx_transact - No-op function, return 0 51 * @hw: pointer to the HW structure 52 **/ 53 static s32 e1000_null_mbx_transact(struct e1000_hw E1000_UNUSEDARG *hw, 54 u32 E1000_UNUSEDARG *msg, 55 u16 E1000_UNUSEDARG size, 56 u16 E1000_UNUSEDARG mbx_id) 57 { 58 DEBUGFUNC("e1000_null_mbx_rw_msg"); 59 60 return E1000_SUCCESS; 61 } 62 63 /** 64 * e1000_read_mbx - Reads a message from the mailbox 65 * @hw: pointer to the HW structure 66 * @msg: The message buffer 67 * @size: Length of buffer 68 * @mbx_id: id of mailbox to read 69 * 70 * returns SUCCESS if it successfuly read message from buffer 71 **/ 72 s32 e1000_read_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) 73 { 74 struct e1000_mbx_info *mbx = &hw->mbx; 75 s32 ret_val = -E1000_ERR_MBX; 76 77 DEBUGFUNC("e1000_read_mbx"); 78 79 /* limit read to size of mailbox */ 80 if (size > mbx->size) 81 size = mbx->size; 82 83 if (mbx->ops.read) 84 ret_val = mbx->ops.read(hw, msg, size, mbx_id); 85 86 return ret_val; 87 } 88 89 /** 90 * e1000_write_mbx - Write a message to the mailbox 91 * @hw: pointer to the HW structure 92 * @msg: The message buffer 93 * @size: Length of buffer 94 * @mbx_id: id of mailbox to write 95 * 96 * returns SUCCESS if it successfully copied message into the buffer 97 **/ 98 s32 e1000_write_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) 99 { 100 struct e1000_mbx_info *mbx = &hw->mbx; 101 s32 ret_val = E1000_SUCCESS; 102 103 DEBUGFUNC("e1000_write_mbx"); 104 105 if (size > mbx->size) 106 ret_val = -E1000_ERR_MBX; 107 108 else if (mbx->ops.write) 109 ret_val = mbx->ops.write(hw, msg, size, mbx_id); 110 111 return ret_val; 112 } 113 114 /** 115 * e1000_check_for_msg - checks to see if someone sent us mail 116 * @hw: pointer to the HW structure 117 * @mbx_id: id of mailbox to check 118 * 119 * returns SUCCESS if the Status bit was found or else ERR_MBX 120 **/ 121 s32 e1000_check_for_msg(struct e1000_hw *hw, u16 mbx_id) 122 { 123 struct e1000_mbx_info *mbx = &hw->mbx; 124 s32 ret_val = -E1000_ERR_MBX; 125 126 DEBUGFUNC("e1000_check_for_msg"); 127 128 if (mbx->ops.check_for_msg) 129 ret_val = mbx->ops.check_for_msg(hw, mbx_id); 130 131 return ret_val; 132 } 133 134 /** 135 * e1000_check_for_ack - checks to see if someone sent us ACK 136 * @hw: pointer to the HW structure 137 * @mbx_id: id of mailbox to check 138 * 139 * returns SUCCESS if the Status bit was found or else ERR_MBX 140 **/ 141 s32 e1000_check_for_ack(struct e1000_hw *hw, u16 mbx_id) 142 { 143 struct e1000_mbx_info *mbx = &hw->mbx; 144 s32 ret_val = -E1000_ERR_MBX; 145 146 DEBUGFUNC("e1000_check_for_ack"); 147 148 if (mbx->ops.check_for_ack) 149 ret_val = mbx->ops.check_for_ack(hw, mbx_id); 150 151 return ret_val; 152 } 153 154 /** 155 * e1000_check_for_rst - checks to see if other side has reset 156 * @hw: pointer to the HW structure 157 * @mbx_id: id of mailbox to check 158 * 159 * returns SUCCESS if the Status bit was found or else ERR_MBX 160 **/ 161 s32 e1000_check_for_rst(struct e1000_hw *hw, u16 mbx_id) 162 { 163 struct e1000_mbx_info *mbx = &hw->mbx; 164 s32 ret_val = -E1000_ERR_MBX; 165 166 DEBUGFUNC("e1000_check_for_rst"); 167 168 if (mbx->ops.check_for_rst) 169 ret_val = mbx->ops.check_for_rst(hw, mbx_id); 170 171 return ret_val; 172 } 173 174 /** 175 * e1000_poll_for_msg - Wait for message notification 176 * @hw: pointer to the HW structure 177 * @mbx_id: id of mailbox to write 178 * 179 * returns SUCCESS if it successfully received a message notification 180 **/ 181 static s32 e1000_poll_for_msg(struct e1000_hw *hw, u16 mbx_id) 182 { 183 struct e1000_mbx_info *mbx = &hw->mbx; 184 int countdown = mbx->timeout; 185 186 DEBUGFUNC("e1000_poll_for_msg"); 187 188 if (!countdown || !mbx->ops.check_for_msg) 189 goto out; 190 191 while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) { 192 countdown--; 193 if (!countdown) 194 break; 195 usec_delay(mbx->usec_delay); 196 } 197 198 /* if we failed, all future posted messages fail until reset */ 199 if (!countdown) 200 mbx->timeout = 0; 201 out: 202 return countdown ? E1000_SUCCESS : -E1000_ERR_MBX; 203 } 204 205 /** 206 * e1000_poll_for_ack - Wait for message acknowledgement 207 * @hw: pointer to the HW structure 208 * @mbx_id: id of mailbox to write 209 * 210 * returns SUCCESS if it successfully received a message acknowledgement 211 **/ 212 static s32 e1000_poll_for_ack(struct e1000_hw *hw, u16 mbx_id) 213 { 214 struct e1000_mbx_info *mbx = &hw->mbx; 215 int countdown = mbx->timeout; 216 217 DEBUGFUNC("e1000_poll_for_ack"); 218 219 if (!countdown || !mbx->ops.check_for_ack) 220 goto out; 221 222 while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) { 223 countdown--; 224 if (!countdown) 225 break; 226 usec_delay(mbx->usec_delay); 227 } 228 229 /* if we failed, all future posted messages fail until reset */ 230 if (!countdown) 231 mbx->timeout = 0; 232 out: 233 return countdown ? E1000_SUCCESS : -E1000_ERR_MBX; 234 } 235 236 /** 237 * e1000_read_posted_mbx - Wait for message notification and receive message 238 * @hw: pointer to the HW structure 239 * @msg: The message buffer 240 * @size: Length of buffer 241 * @mbx_id: id of mailbox to write 242 * 243 * returns SUCCESS if it successfully received a message notification and 244 * copied it into the receive buffer. 245 **/ 246 s32 e1000_read_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) 247 { 248 struct e1000_mbx_info *mbx = &hw->mbx; 249 s32 ret_val = -E1000_ERR_MBX; 250 251 DEBUGFUNC("e1000_read_posted_mbx"); 252 253 if (!mbx->ops.read) 254 goto out; 255 256 ret_val = e1000_poll_for_msg(hw, mbx_id); 257 258 /* if ack received read message, otherwise we timed out */ 259 if (!ret_val) 260 ret_val = mbx->ops.read(hw, msg, size, mbx_id); 261 out: 262 return ret_val; 263 } 264 265 /** 266 * e1000_write_posted_mbx - Write a message to the mailbox, wait for ack 267 * @hw: pointer to the HW structure 268 * @msg: The message buffer 269 * @size: Length of buffer 270 * @mbx_id: id of mailbox to write 271 * 272 * returns SUCCESS if it successfully copied message into the buffer and 273 * received an ack to that message within delay * timeout period 274 **/ 275 s32 e1000_write_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) 276 { 277 struct e1000_mbx_info *mbx = &hw->mbx; 278 s32 ret_val = -E1000_ERR_MBX; 279 280 DEBUGFUNC("e1000_write_posted_mbx"); 281 282 /* exit if either we can't write or there isn't a defined timeout */ 283 if (!mbx->ops.write || !mbx->timeout) 284 goto out; 285 286 /* send msg */ 287 ret_val = mbx->ops.write(hw, msg, size, mbx_id); 288 289 /* if msg sent wait until we receive an ack */ 290 if (!ret_val) 291 ret_val = e1000_poll_for_ack(hw, mbx_id); 292 out: 293 return ret_val; 294 } 295 296 /** 297 * e1000_init_mbx_ops_generic - Initialize mbx function pointers 298 * @hw: pointer to the HW structure 299 * 300 * Sets the function pointers to no-op functions 301 **/ 302 void e1000_init_mbx_ops_generic(struct e1000_hw *hw) 303 { 304 struct e1000_mbx_info *mbx = &hw->mbx; 305 mbx->ops.init_params = e1000_null_ops_generic; 306 mbx->ops.read = e1000_null_mbx_transact; 307 mbx->ops.write = e1000_null_mbx_transact; 308 mbx->ops.check_for_msg = e1000_null_mbx_check_for_flag; 309 mbx->ops.check_for_ack = e1000_null_mbx_check_for_flag; 310 mbx->ops.check_for_rst = e1000_null_mbx_check_for_flag; 311 mbx->ops.read_posted = e1000_read_posted_mbx; 312 mbx->ops.write_posted = e1000_write_posted_mbx; 313 } 314 315 /** 316 * e1000_read_v2p_mailbox - read v2p mailbox 317 * @hw: pointer to the HW structure 318 * 319 * This function is used to read the v2p mailbox without losing the read to 320 * clear status bits. 321 **/ 322 static u32 e1000_read_v2p_mailbox(struct e1000_hw *hw) 323 { 324 u32 v2p_mailbox = E1000_READ_REG(hw, E1000_V2PMAILBOX(0)); 325 326 v2p_mailbox |= hw->dev_spec.vf.v2p_mailbox; 327 hw->dev_spec.vf.v2p_mailbox |= v2p_mailbox & E1000_V2PMAILBOX_R2C_BITS; 328 329 return v2p_mailbox; 330 } 331 332 /** 333 * e1000_check_for_bit_vf - Determine if a status bit was set 334 * @hw: pointer to the HW structure 335 * @mask: bitmask for bits to be tested and cleared 336 * 337 * This function is used to check for the read to clear bits within 338 * the V2P mailbox. 339 **/ 340 static s32 e1000_check_for_bit_vf(struct e1000_hw *hw, u32 mask) 341 { 342 u32 v2p_mailbox = e1000_read_v2p_mailbox(hw); 343 s32 ret_val = -E1000_ERR_MBX; 344 345 if (v2p_mailbox & mask) 346 ret_val = E1000_SUCCESS; 347 348 hw->dev_spec.vf.v2p_mailbox &= ~mask; 349 350 return ret_val; 351 } 352 353 /** 354 * e1000_check_for_msg_vf - checks to see if the PF has sent mail 355 * @hw: pointer to the HW structure 356 * @mbx_id: id of mailbox to check 357 * 358 * returns SUCCESS if the PF has set the Status bit or else ERR_MBX 359 **/ 360 static s32 e1000_check_for_msg_vf(struct e1000_hw *hw, 361 u16 E1000_UNUSEDARG mbx_id) 362 { 363 s32 ret_val = -E1000_ERR_MBX; 364 365 DEBUGFUNC("e1000_check_for_msg_vf"); 366 367 if (!e1000_check_for_bit_vf(hw, E1000_V2PMAILBOX_PFSTS)) { 368 ret_val = E1000_SUCCESS; 369 hw->mbx.stats.reqs++; 370 } 371 372 return ret_val; 373 } 374 375 /** 376 * e1000_check_for_ack_vf - checks to see if the PF has ACK'd 377 * @hw: pointer to the HW structure 378 * @mbx_id: id of mailbox to check 379 * 380 * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX 381 **/ 382 static s32 e1000_check_for_ack_vf(struct e1000_hw *hw, 383 u16 E1000_UNUSEDARG mbx_id) 384 { 385 s32 ret_val = -E1000_ERR_MBX; 386 387 DEBUGFUNC("e1000_check_for_ack_vf"); 388 389 if (!e1000_check_for_bit_vf(hw, E1000_V2PMAILBOX_PFACK)) { 390 ret_val = E1000_SUCCESS; 391 hw->mbx.stats.acks++; 392 } 393 394 return ret_val; 395 } 396 397 /** 398 * e1000_check_for_rst_vf - checks to see if the PF has reset 399 * @hw: pointer to the HW structure 400 * @mbx_id: id of mailbox to check 401 * 402 * returns TRUE if the PF has set the reset done bit or else FALSE 403 **/ 404 static s32 e1000_check_for_rst_vf(struct e1000_hw *hw, 405 u16 E1000_UNUSEDARG mbx_id) 406 { 407 s32 ret_val = -E1000_ERR_MBX; 408 409 DEBUGFUNC("e1000_check_for_rst_vf"); 410 411 if (!e1000_check_for_bit_vf(hw, (E1000_V2PMAILBOX_RSTD | 412 E1000_V2PMAILBOX_RSTI))) { 413 ret_val = E1000_SUCCESS; 414 hw->mbx.stats.rsts++; 415 } 416 417 return ret_val; 418 } 419 420 /** 421 * e1000_obtain_mbx_lock_vf - obtain mailbox lock 422 * @hw: pointer to the HW structure 423 * 424 * return SUCCESS if we obtained the mailbox lock 425 **/ 426 static s32 e1000_obtain_mbx_lock_vf(struct e1000_hw *hw) 427 { 428 s32 ret_val = -E1000_ERR_MBX; 429 430 DEBUGFUNC("e1000_obtain_mbx_lock_vf"); 431 432 /* Take ownership of the buffer */ 433 E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_VFU); 434 435 /* reserve mailbox for vf use */ 436 if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU) 437 ret_val = E1000_SUCCESS; 438 439 return ret_val; 440 } 441 442 /** 443 * e1000_write_mbx_vf - Write a message to the mailbox 444 * @hw: pointer to the HW structure 445 * @msg: The message buffer 446 * @size: Length of buffer 447 * @mbx_id: id of mailbox to write 448 * 449 * returns SUCCESS if it successfully copied message into the buffer 450 **/ 451 static s32 e1000_write_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size, 452 u16 E1000_UNUSEDARG mbx_id) 453 { 454 s32 ret_val; 455 u16 i; 456 457 458 DEBUGFUNC("e1000_write_mbx_vf"); 459 460 /* lock the mailbox to prevent pf/vf race condition */ 461 ret_val = e1000_obtain_mbx_lock_vf(hw); 462 if (ret_val) 463 goto out_no_write; 464 465 /* flush msg and acks as we are overwriting the message buffer */ 466 e1000_check_for_msg_vf(hw, 0); 467 e1000_check_for_ack_vf(hw, 0); 468 469 /* copy the caller specified message to the mailbox memory buffer */ 470 for (i = 0; i < size; i++) 471 E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(0), i, msg[i]); 472 473 /* update stats */ 474 hw->mbx.stats.msgs_tx++; 475 476 /* Drop VFU and interrupt the PF to tell it a message has been sent */ 477 E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_REQ); 478 479 out_no_write: 480 return ret_val; 481 } 482 483 /** 484 * e1000_read_mbx_vf - Reads a message from the inbox intended for vf 485 * @hw: pointer to the HW structure 486 * @msg: The message buffer 487 * @size: Length of buffer 488 * @mbx_id: id of mailbox to read 489 * 490 * returns SUCCESS if it successfuly read message from buffer 491 **/ 492 static s32 e1000_read_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size, 493 u16 E1000_UNUSEDARG mbx_id) 494 { 495 s32 ret_val = E1000_SUCCESS; 496 u16 i; 497 498 DEBUGFUNC("e1000_read_mbx_vf"); 499 500 /* lock the mailbox to prevent pf/vf race condition */ 501 ret_val = e1000_obtain_mbx_lock_vf(hw); 502 if (ret_val) 503 goto out_no_read; 504 505 /* copy the message from the mailbox memory buffer */ 506 for (i = 0; i < size; i++) 507 msg[i] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(0), i); 508 509 /* Acknowledge receipt and release mailbox, then we're done */ 510 E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_ACK); 511 512 /* update stats */ 513 hw->mbx.stats.msgs_rx++; 514 515 out_no_read: 516 return ret_val; 517 } 518 519 /** 520 * e1000_init_mbx_params_vf - set initial values for vf mailbox 521 * @hw: pointer to the HW structure 522 * 523 * Initializes the hw->mbx struct to correct values for vf mailbox 524 */ 525 s32 e1000_init_mbx_params_vf(struct e1000_hw *hw) 526 { 527 struct e1000_mbx_info *mbx = &hw->mbx; 528 529 /* start mailbox as timed out and let the reset_hw call set the timeout 530 * value to begin communications */ 531 mbx->timeout = 0; 532 mbx->usec_delay = E1000_VF_MBX_INIT_DELAY; 533 534 mbx->size = E1000_VFMAILBOX_SIZE; 535 536 mbx->ops.read = e1000_read_mbx_vf; 537 mbx->ops.write = e1000_write_mbx_vf; 538 mbx->ops.read_posted = e1000_read_posted_mbx; 539 mbx->ops.write_posted = e1000_write_posted_mbx; 540 mbx->ops.check_for_msg = e1000_check_for_msg_vf; 541 mbx->ops.check_for_ack = e1000_check_for_ack_vf; 542 mbx->ops.check_for_rst = e1000_check_for_rst_vf; 543 544 mbx->stats.msgs_tx = 0; 545 mbx->stats.msgs_rx = 0; 546 mbx->stats.reqs = 0; 547 mbx->stats.acks = 0; 548 mbx->stats.rsts = 0; 549 550 return E1000_SUCCESS; 551 } 552 553 static s32 e1000_check_for_bit_pf(struct e1000_hw *hw, u32 mask) 554 { 555 u32 mbvficr = E1000_READ_REG(hw, E1000_MBVFICR); 556 s32 ret_val = -E1000_ERR_MBX; 557 558 if (mbvficr & mask) { 559 ret_val = E1000_SUCCESS; 560 E1000_WRITE_REG(hw, E1000_MBVFICR, mask); 561 } 562 563 return ret_val; 564 } 565 566 /** 567 * e1000_check_for_msg_pf - checks to see if the VF has sent mail 568 * @hw: pointer to the HW structure 569 * @vf_number: the VF index 570 * 571 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX 572 **/ 573 static s32 e1000_check_for_msg_pf(struct e1000_hw *hw, u16 vf_number) 574 { 575 s32 ret_val = -E1000_ERR_MBX; 576 577 DEBUGFUNC("e1000_check_for_msg_pf"); 578 579 if (!e1000_check_for_bit_pf(hw, E1000_MBVFICR_VFREQ_VF1 << vf_number)) { 580 ret_val = E1000_SUCCESS; 581 hw->mbx.stats.reqs++; 582 } 583 584 return ret_val; 585 } 586 587 /** 588 * e1000_check_for_ack_pf - checks to see if the VF has ACKed 589 * @hw: pointer to the HW structure 590 * @vf_number: the VF index 591 * 592 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX 593 **/ 594 static s32 e1000_check_for_ack_pf(struct e1000_hw *hw, u16 vf_number) 595 { 596 s32 ret_val = -E1000_ERR_MBX; 597 598 DEBUGFUNC("e1000_check_for_ack_pf"); 599 600 if (!e1000_check_for_bit_pf(hw, E1000_MBVFICR_VFACK_VF1 << vf_number)) { 601 ret_val = E1000_SUCCESS; 602 hw->mbx.stats.acks++; 603 } 604 605 return ret_val; 606 } 607 608 /** 609 * e1000_check_for_rst_pf - checks to see if the VF has reset 610 * @hw: pointer to the HW structure 611 * @vf_number: the VF index 612 * 613 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX 614 **/ 615 static s32 e1000_check_for_rst_pf(struct e1000_hw *hw, u16 vf_number) 616 { 617 u32 vflre = E1000_READ_REG(hw, E1000_VFLRE); 618 s32 ret_val = -E1000_ERR_MBX; 619 620 DEBUGFUNC("e1000_check_for_rst_pf"); 621 622 if (vflre & (1 << vf_number)) { 623 ret_val = E1000_SUCCESS; 624 E1000_WRITE_REG(hw, E1000_VFLRE, (1 << vf_number)); 625 hw->mbx.stats.rsts++; 626 } 627 628 return ret_val; 629 } 630 631 /** 632 * e1000_obtain_mbx_lock_pf - obtain mailbox lock 633 * @hw: pointer to the HW structure 634 * @vf_number: the VF index 635 * 636 * return SUCCESS if we obtained the mailbox lock 637 **/ 638 static s32 e1000_obtain_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number) 639 { 640 s32 ret_val = -E1000_ERR_MBX; 641 u32 p2v_mailbox; 642 643 DEBUGFUNC("e1000_obtain_mbx_lock_pf"); 644 645 /* Take ownership of the buffer */ 646 E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_PFU); 647 648 /* reserve mailbox for vf use */ 649 p2v_mailbox = E1000_READ_REG(hw, E1000_P2VMAILBOX(vf_number)); 650 if (p2v_mailbox & E1000_P2VMAILBOX_PFU) 651 ret_val = E1000_SUCCESS; 652 653 return ret_val; 654 } 655 656 /** 657 * e1000_write_mbx_pf - Places a message in the mailbox 658 * @hw: pointer to the HW structure 659 * @msg: The message buffer 660 * @size: Length of buffer 661 * @vf_number: the VF index 662 * 663 * returns SUCCESS if it successfully copied message into the buffer 664 **/ 665 static s32 e1000_write_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size, 666 u16 vf_number) 667 { 668 s32 ret_val; 669 u16 i; 670 671 DEBUGFUNC("e1000_write_mbx_pf"); 672 673 /* lock the mailbox to prevent pf/vf race condition */ 674 ret_val = e1000_obtain_mbx_lock_pf(hw, vf_number); 675 if (ret_val) 676 goto out_no_write; 677 678 /* flush msg and acks as we are overwriting the message buffer */ 679 e1000_check_for_msg_pf(hw, vf_number); 680 e1000_check_for_ack_pf(hw, vf_number); 681 682 /* copy the caller specified message to the mailbox memory buffer */ 683 for (i = 0; i < size; i++) 684 E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i, msg[i]); 685 686 /* Interrupt VF to tell it a message has been sent and release buffer*/ 687 E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_STS); 688 689 /* update stats */ 690 hw->mbx.stats.msgs_tx++; 691 692 out_no_write: 693 return ret_val; 694 695 } 696 697 /** 698 * e1000_read_mbx_pf - Read a message from the mailbox 699 * @hw: pointer to the HW structure 700 * @msg: The message buffer 701 * @size: Length of buffer 702 * @vf_number: the VF index 703 * 704 * This function copies a message from the mailbox buffer to the caller's 705 * memory buffer. The presumption is that the caller knows that there was 706 * a message due to a VF request so no polling for message is needed. 707 **/ 708 static s32 e1000_read_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size, 709 u16 vf_number) 710 { 711 s32 ret_val; 712 u16 i; 713 714 DEBUGFUNC("e1000_read_mbx_pf"); 715 716 /* lock the mailbox to prevent pf/vf race condition */ 717 ret_val = e1000_obtain_mbx_lock_pf(hw, vf_number); 718 if (ret_val) 719 goto out_no_read; 720 721 /* copy the message to the mailbox memory buffer */ 722 for (i = 0; i < size; i++) 723 msg[i] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i); 724 725 /* Acknowledge the message and release buffer */ 726 E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_ACK); 727 728 /* update stats */ 729 hw->mbx.stats.msgs_rx++; 730 731 out_no_read: 732 return ret_val; 733 } 734 735 /** 736 * e1000_init_mbx_params_pf - set initial values for pf mailbox 737 * @hw: pointer to the HW structure 738 * 739 * Initializes the hw->mbx struct to correct values for pf mailbox 740 */ 741 s32 e1000_init_mbx_params_pf(struct e1000_hw *hw) 742 { 743 struct e1000_mbx_info *mbx = &hw->mbx; 744 745 switch (hw->mac.type) { 746 case e1000_82576: 747 case e1000_i350: 748 case e1000_i354: 749 mbx->timeout = 0; 750 mbx->usec_delay = 0; 751 752 mbx->size = E1000_VFMAILBOX_SIZE; 753 754 mbx->ops.read = e1000_read_mbx_pf; 755 mbx->ops.write = e1000_write_mbx_pf; 756 mbx->ops.read_posted = e1000_read_posted_mbx; 757 mbx->ops.write_posted = e1000_write_posted_mbx; 758 mbx->ops.check_for_msg = e1000_check_for_msg_pf; 759 mbx->ops.check_for_ack = e1000_check_for_ack_pf; 760 mbx->ops.check_for_rst = e1000_check_for_rst_pf; 761 762 mbx->stats.msgs_tx = 0; 763 mbx->stats.msgs_rx = 0; 764 mbx->stats.reqs = 0; 765 mbx->stats.acks = 0; 766 mbx->stats.rsts = 0; 767 default: 768 return E1000_SUCCESS; 769 } 770 } 771 772