Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/e1000/e1000_manage.c
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1 /****************************************************************************** 2 3 Copyright (c) 2001-2014, 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_api.h" 36 37 /** 38 * e1000_calculate_checksum - Calculate checksum for buffer 39 * @buffer: pointer to EEPROM 40 * @length: size of EEPROM to calculate a checksum for 41 * 42 * Calculates the checksum for some buffer on a specified length. The 43 * checksum calculated is returned. 44 **/ 45 u8 e1000_calculate_checksum(u8 *buffer, u32 length) 46 { 47 u32 i; 48 u8 sum = 0; 49 50 DEBUGFUNC("e1000_calculate_checksum"); 51 52 if (!buffer) 53 return 0; 54 55 for (i = 0; i < length; i++) 56 sum += buffer[i]; 57 58 return (u8) (0 - sum); 59 } 60 61 /** 62 * e1000_mng_enable_host_if_generic - Checks host interface is enabled 63 * @hw: pointer to the HW structure 64 * 65 * Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND 66 * 67 * This function checks whether the HOST IF is enabled for command operation 68 * and also checks whether the previous command is completed. It busy waits 69 * in case of previous command is not completed. 70 **/ 71 s32 e1000_mng_enable_host_if_generic(struct e1000_hw *hw) 72 { 73 u32 hicr; 74 u8 i; 75 76 DEBUGFUNC("e1000_mng_enable_host_if_generic"); 77 78 if (!hw->mac.arc_subsystem_valid) { 79 DEBUGOUT("ARC subsystem not valid.\n"); 80 return -E1000_ERR_HOST_INTERFACE_COMMAND; 81 } 82 83 /* Check that the host interface is enabled. */ 84 hicr = E1000_READ_REG(hw, E1000_HICR); 85 if (!(hicr & E1000_HICR_EN)) { 86 DEBUGOUT("E1000_HOST_EN bit disabled.\n"); 87 return -E1000_ERR_HOST_INTERFACE_COMMAND; 88 } 89 /* check the previous command is completed */ 90 for (i = 0; i < E1000_MNG_DHCP_COMMAND_TIMEOUT; i++) { 91 hicr = E1000_READ_REG(hw, E1000_HICR); 92 if (!(hicr & E1000_HICR_C)) 93 break; 94 msec_delay_irq(1); 95 } 96 97 if (i == E1000_MNG_DHCP_COMMAND_TIMEOUT) { 98 DEBUGOUT("Previous command timeout failed .\n"); 99 return -E1000_ERR_HOST_INTERFACE_COMMAND; 100 } 101 102 return E1000_SUCCESS; 103 } 104 105 /** 106 * e1000_check_mng_mode_generic - Generic check management mode 107 * @hw: pointer to the HW structure 108 * 109 * Reads the firmware semaphore register and returns TRUE (>0) if 110 * manageability is enabled, else FALSE (0). 111 **/ 112 bool e1000_check_mng_mode_generic(struct e1000_hw *hw) 113 { 114 u32 fwsm = E1000_READ_REG(hw, E1000_FWSM); 115 116 DEBUGFUNC("e1000_check_mng_mode_generic"); 117 118 119 return (fwsm & E1000_FWSM_MODE_MASK) == 120 (E1000_MNG_IAMT_MODE << E1000_FWSM_MODE_SHIFT); 121 } 122 123 /** 124 * e1000_enable_tx_pkt_filtering_generic - Enable packet filtering on Tx 125 * @hw: pointer to the HW structure 126 * 127 * Enables packet filtering on transmit packets if manageability is enabled 128 * and host interface is enabled. 129 **/ 130 bool e1000_enable_tx_pkt_filtering_generic(struct e1000_hw *hw) 131 { 132 struct e1000_host_mng_dhcp_cookie *hdr = &hw->mng_cookie; 133 u32 *buffer = (u32 *)&hw->mng_cookie; 134 u32 offset; 135 s32 ret_val, hdr_csum, csum; 136 u8 i, len; 137 138 DEBUGFUNC("e1000_enable_tx_pkt_filtering_generic"); 139 140 hw->mac.tx_pkt_filtering = TRUE; 141 142 /* No manageability, no filtering */ 143 if (!hw->mac.ops.check_mng_mode(hw)) { 144 hw->mac.tx_pkt_filtering = FALSE; 145 return hw->mac.tx_pkt_filtering; 146 } 147 148 /* If we can't read from the host interface for whatever 149 * reason, disable filtering. 150 */ 151 ret_val = e1000_mng_enable_host_if_generic(hw); 152 if (ret_val != E1000_SUCCESS) { 153 hw->mac.tx_pkt_filtering = FALSE; 154 return hw->mac.tx_pkt_filtering; 155 } 156 157 /* Read in the header. Length and offset are in dwords. */ 158 len = E1000_MNG_DHCP_COOKIE_LENGTH >> 2; 159 offset = E1000_MNG_DHCP_COOKIE_OFFSET >> 2; 160 for (i = 0; i < len; i++) 161 *(buffer + i) = E1000_READ_REG_ARRAY_DWORD(hw, E1000_HOST_IF, 162 offset + i); 163 hdr_csum = hdr->checksum; 164 hdr->checksum = 0; 165 csum = e1000_calculate_checksum((u8 *)hdr, 166 E1000_MNG_DHCP_COOKIE_LENGTH); 167 /* If either the checksums or signature don't match, then 168 * the cookie area isn't considered valid, in which case we 169 * take the safe route of assuming Tx filtering is enabled. 170 */ 171 if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) { 172 hw->mac.tx_pkt_filtering = TRUE; 173 return hw->mac.tx_pkt_filtering; 174 } 175 176 /* Cookie area is valid, make the final check for filtering. */ 177 if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING)) 178 hw->mac.tx_pkt_filtering = FALSE; 179 180 return hw->mac.tx_pkt_filtering; 181 } 182 183 /** 184 * e1000_mng_write_cmd_header_generic - Writes manageability command header 185 * @hw: pointer to the HW structure 186 * @hdr: pointer to the host interface command header 187 * 188 * Writes the command header after does the checksum calculation. 189 **/ 190 s32 e1000_mng_write_cmd_header_generic(struct e1000_hw *hw, 191 struct e1000_host_mng_command_header *hdr) 192 { 193 u16 i, length = sizeof(struct e1000_host_mng_command_header); 194 195 DEBUGFUNC("e1000_mng_write_cmd_header_generic"); 196 197 /* Write the whole command header structure with new checksum. */ 198 199 hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length); 200 201 length >>= 2; 202 /* Write the relevant command block into the ram area. */ 203 for (i = 0; i < length; i++) { 204 E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, i, 205 *((u32 *) hdr + i)); 206 E1000_WRITE_FLUSH(hw); 207 } 208 209 return E1000_SUCCESS; 210 } 211 212 /** 213 * e1000_mng_host_if_write_generic - Write to the manageability host interface 214 * @hw: pointer to the HW structure 215 * @buffer: pointer to the host interface buffer 216 * @length: size of the buffer 217 * @offset: location in the buffer to write to 218 * @sum: sum of the data (not checksum) 219 * 220 * This function writes the buffer content at the offset given on the host if. 221 * It also does alignment considerations to do the writes in most efficient 222 * way. Also fills up the sum of the buffer in *buffer parameter. 223 **/ 224 s32 e1000_mng_host_if_write_generic(struct e1000_hw *hw, u8 *buffer, 225 u16 length, u16 offset, u8 *sum) 226 { 227 u8 *tmp; 228 u8 *bufptr = buffer; 229 u32 data = 0; 230 u16 remaining, i, j, prev_bytes; 231 232 DEBUGFUNC("e1000_mng_host_if_write_generic"); 233 234 /* sum = only sum of the data and it is not checksum */ 235 236 if (length == 0 || offset + length > E1000_HI_MAX_MNG_DATA_LENGTH) 237 return -E1000_ERR_PARAM; 238 239 tmp = (u8 *)&data; 240 prev_bytes = offset & 0x3; 241 offset >>= 2; 242 243 if (prev_bytes) { 244 data = E1000_READ_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset); 245 for (j = prev_bytes; j < sizeof(u32); j++) { 246 *(tmp + j) = *bufptr++; 247 *sum += *(tmp + j); 248 } 249 E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset, data); 250 length -= j - prev_bytes; 251 offset++; 252 } 253 254 remaining = length & 0x3; 255 length -= remaining; 256 257 /* Calculate length in DWORDs */ 258 length >>= 2; 259 260 /* The device driver writes the relevant command block into the 261 * ram area. 262 */ 263 for (i = 0; i < length; i++) { 264 for (j = 0; j < sizeof(u32); j++) { 265 *(tmp + j) = *bufptr++; 266 *sum += *(tmp + j); 267 } 268 269 E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset + i, 270 data); 271 } 272 if (remaining) { 273 for (j = 0; j < sizeof(u32); j++) { 274 if (j < remaining) 275 *(tmp + j) = *bufptr++; 276 else 277 *(tmp + j) = 0; 278 279 *sum += *(tmp + j); 280 } 281 E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset + i, 282 data); 283 } 284 285 return E1000_SUCCESS; 286 } 287 288 /** 289 * e1000_mng_write_dhcp_info_generic - Writes DHCP info to host interface 290 * @hw: pointer to the HW structure 291 * @buffer: pointer to the host interface 292 * @length: size of the buffer 293 * 294 * Writes the DHCP information to the host interface. 295 **/ 296 s32 e1000_mng_write_dhcp_info_generic(struct e1000_hw *hw, u8 *buffer, 297 u16 length) 298 { 299 struct e1000_host_mng_command_header hdr; 300 s32 ret_val; 301 u32 hicr; 302 303 DEBUGFUNC("e1000_mng_write_dhcp_info_generic"); 304 305 hdr.command_id = E1000_MNG_DHCP_TX_PAYLOAD_CMD; 306 hdr.command_length = length; 307 hdr.reserved1 = 0; 308 hdr.reserved2 = 0; 309 hdr.checksum = 0; 310 311 /* Enable the host interface */ 312 ret_val = e1000_mng_enable_host_if_generic(hw); 313 if (ret_val) 314 return ret_val; 315 316 /* Populate the host interface with the contents of "buffer". */ 317 ret_val = e1000_mng_host_if_write_generic(hw, buffer, length, 318 sizeof(hdr), &(hdr.checksum)); 319 if (ret_val) 320 return ret_val; 321 322 /* Write the manageability command header */ 323 ret_val = e1000_mng_write_cmd_header_generic(hw, &hdr); 324 if (ret_val) 325 return ret_val; 326 327 /* Tell the ARC a new command is pending. */ 328 hicr = E1000_READ_REG(hw, E1000_HICR); 329 E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C); 330 331 return E1000_SUCCESS; 332 } 333 334 /** 335 * e1000_enable_mng_pass_thru - Check if management passthrough is needed 336 * @hw: pointer to the HW structure 337 * 338 * Verifies the hardware needs to leave interface enabled so that frames can 339 * be directed to and from the management interface. 340 **/ 341 bool e1000_enable_mng_pass_thru(struct e1000_hw *hw) 342 { 343 u32 manc; 344 u32 fwsm, factps; 345 346 DEBUGFUNC("e1000_enable_mng_pass_thru"); 347 348 if (!hw->mac.asf_firmware_present) 349 return FALSE; 350 351 manc = E1000_READ_REG(hw, E1000_MANC); 352 353 if (!(manc & E1000_MANC_RCV_TCO_EN)) 354 return FALSE; 355 356 if (hw->mac.has_fwsm) { 357 fwsm = E1000_READ_REG(hw, E1000_FWSM); 358 factps = E1000_READ_REG(hw, E1000_FACTPS); 359 360 if (!(factps & E1000_FACTPS_MNGCG) && 361 ((fwsm & E1000_FWSM_MODE_MASK) == 362 (e1000_mng_mode_pt << E1000_FWSM_MODE_SHIFT))) 363 return TRUE; 364 } else if ((hw->mac.type == e1000_82574) || 365 (hw->mac.type == e1000_82583)) { 366 u16 data; 367 s32 ret_val; 368 369 factps = E1000_READ_REG(hw, E1000_FACTPS); 370 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data); 371 if (ret_val) 372 return FALSE; 373 374 if (!(factps & E1000_FACTPS_MNGCG) && 375 ((data & E1000_NVM_INIT_CTRL2_MNGM) == 376 (e1000_mng_mode_pt << 13))) 377 return TRUE; 378 } else if ((manc & E1000_MANC_SMBUS_EN) && 379 !(manc & E1000_MANC_ASF_EN)) { 380 return TRUE; 381 } 382 383 return FALSE; 384 } 385 386 /** 387 * e1000_host_interface_command - Writes buffer to host interface 388 * @hw: pointer to the HW structure 389 * @buffer: contains a command to write 390 * @length: the byte length of the buffer, must be multiple of 4 bytes 391 * 392 * Writes a buffer to the Host Interface. Upon success, returns E1000_SUCCESS 393 * else returns E1000_ERR_HOST_INTERFACE_COMMAND. 394 **/ 395 s32 e1000_host_interface_command(struct e1000_hw *hw, u8 *buffer, u32 length) 396 { 397 u32 hicr, i; 398 399 DEBUGFUNC("e1000_host_interface_command"); 400 401 if (!(hw->mac.arc_subsystem_valid)) { 402 DEBUGOUT("Hardware doesn't support host interface command.\n"); 403 return E1000_SUCCESS; 404 } 405 406 if (!hw->mac.asf_firmware_present) { 407 DEBUGOUT("Firmware is not present.\n"); 408 return E1000_SUCCESS; 409 } 410 411 if (length == 0 || length & 0x3 || 412 length > E1000_HI_MAX_BLOCK_BYTE_LENGTH) { 413 DEBUGOUT("Buffer length failure.\n"); 414 return -E1000_ERR_HOST_INTERFACE_COMMAND; 415 } 416 417 /* Check that the host interface is enabled. */ 418 hicr = E1000_READ_REG(hw, E1000_HICR); 419 if (!(hicr & E1000_HICR_EN)) { 420 DEBUGOUT("E1000_HOST_EN bit disabled.\n"); 421 return -E1000_ERR_HOST_INTERFACE_COMMAND; 422 } 423 424 /* Calculate length in DWORDs */ 425 length >>= 2; 426 427 /* The device driver writes the relevant command block 428 * into the ram area. 429 */ 430 for (i = 0; i < length; i++) 431 E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, i, 432 *((u32 *)buffer + i)); 433 434 /* Setting this bit tells the ARC that a new command is pending. */ 435 E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C); 436 437 for (i = 0; i < E1000_HI_COMMAND_TIMEOUT; i++) { 438 hicr = E1000_READ_REG(hw, E1000_HICR); 439 if (!(hicr & E1000_HICR_C)) 440 break; 441 msec_delay(1); 442 } 443 444 /* Check command successful completion. */ 445 if (i == E1000_HI_COMMAND_TIMEOUT || 446 (!(E1000_READ_REG(hw, E1000_HICR) & E1000_HICR_SV))) { 447 DEBUGOUT("Command has failed with no status valid.\n"); 448 return -E1000_ERR_HOST_INTERFACE_COMMAND; 449 } 450 451 for (i = 0; i < length; i++) 452 *((u32 *)buffer + i) = E1000_READ_REG_ARRAY_DWORD(hw, 453 E1000_HOST_IF, 454 i); 455 456 return E1000_SUCCESS; 457 } 458 /** 459 * e1000_load_firmware - Writes proxy FW code buffer to host interface 460 * and execute. 461 * @hw: pointer to the HW structure 462 * @buffer: contains a firmware to write 463 * @length: the byte length of the buffer, must be multiple of 4 bytes 464 * 465 * Upon success returns E1000_SUCCESS, returns E1000_ERR_CONFIG if not enabled 466 * in HW else returns E1000_ERR_HOST_INTERFACE_COMMAND. 467 **/ 468 s32 e1000_load_firmware(struct e1000_hw *hw, u8 *buffer, u32 length) 469 { 470 u32 hicr, hibba, fwsm, icr, i; 471 472 DEBUGFUNC("e1000_load_firmware"); 473 474 if (hw->mac.type < e1000_i210) { 475 DEBUGOUT("Hardware doesn't support loading FW by the driver\n"); 476 return -E1000_ERR_CONFIG; 477 } 478 479 /* Check that the host interface is enabled. */ 480 hicr = E1000_READ_REG(hw, E1000_HICR); 481 if (!(hicr & E1000_HICR_EN)) { 482 DEBUGOUT("E1000_HOST_EN bit disabled.\n"); 483 return -E1000_ERR_CONFIG; 484 } 485 if (!(hicr & E1000_HICR_MEMORY_BASE_EN)) { 486 DEBUGOUT("E1000_HICR_MEMORY_BASE_EN bit disabled.\n"); 487 return -E1000_ERR_CONFIG; 488 } 489 490 if (length == 0 || length & 0x3 || length > E1000_HI_FW_MAX_LENGTH) { 491 DEBUGOUT("Buffer length failure.\n"); 492 return -E1000_ERR_INVALID_ARGUMENT; 493 } 494 495 /* Clear notification from ROM-FW by reading ICR register */ 496 icr = E1000_READ_REG(hw, E1000_ICR_V2); 497 498 /* Reset ROM-FW */ 499 hicr = E1000_READ_REG(hw, E1000_HICR); 500 hicr |= E1000_HICR_FW_RESET_ENABLE; 501 E1000_WRITE_REG(hw, E1000_HICR, hicr); 502 hicr |= E1000_HICR_FW_RESET; 503 E1000_WRITE_REG(hw, E1000_HICR, hicr); 504 E1000_WRITE_FLUSH(hw); 505 506 /* Wait till MAC notifies about its readiness after ROM-FW reset */ 507 for (i = 0; i < (E1000_HI_COMMAND_TIMEOUT * 2); i++) { 508 icr = E1000_READ_REG(hw, E1000_ICR_V2); 509 if (icr & E1000_ICR_MNG) 510 break; 511 msec_delay(1); 512 } 513 514 /* Check for timeout */ 515 if (i == E1000_HI_COMMAND_TIMEOUT) { 516 DEBUGOUT("FW reset failed.\n"); 517 return -E1000_ERR_HOST_INTERFACE_COMMAND; 518 } 519 520 /* Wait till MAC is ready to accept new FW code */ 521 for (i = 0; i < E1000_HI_COMMAND_TIMEOUT; i++) { 522 fwsm = E1000_READ_REG(hw, E1000_FWSM); 523 if ((fwsm & E1000_FWSM_FW_VALID) && 524 ((fwsm & E1000_FWSM_MODE_MASK) >> E1000_FWSM_MODE_SHIFT == 525 E1000_FWSM_HI_EN_ONLY_MODE)) 526 break; 527 msec_delay(1); 528 } 529 530 /* Check for timeout */ 531 if (i == E1000_HI_COMMAND_TIMEOUT) { 532 DEBUGOUT("FW reset failed.\n"); 533 return -E1000_ERR_HOST_INTERFACE_COMMAND; 534 } 535 536 /* Calculate length in DWORDs */ 537 length >>= 2; 538 539 /* The device driver writes the relevant FW code block 540 * into the ram area in DWORDs via 1kB ram addressing window. 541 */ 542 for (i = 0; i < length; i++) { 543 if (!(i % E1000_HI_FW_BLOCK_DWORD_LENGTH)) { 544 /* Point to correct 1kB ram window */ 545 hibba = E1000_HI_FW_BASE_ADDRESS + 546 ((E1000_HI_FW_BLOCK_DWORD_LENGTH << 2) * 547 (i / E1000_HI_FW_BLOCK_DWORD_LENGTH)); 548 549 E1000_WRITE_REG(hw, E1000_HIBBA, hibba); 550 } 551 552 E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, 553 i % E1000_HI_FW_BLOCK_DWORD_LENGTH, 554 *((u32 *)buffer + i)); 555 } 556 557 /* Setting this bit tells the ARC that a new FW is ready to execute. */ 558 hicr = E1000_READ_REG(hw, E1000_HICR); 559 E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C); 560 561 for (i = 0; i < E1000_HI_COMMAND_TIMEOUT; i++) { 562 hicr = E1000_READ_REG(hw, E1000_HICR); 563 if (!(hicr & E1000_HICR_C)) 564 break; 565 msec_delay(1); 566 } 567 568 /* Check for successful FW start. */ 569 if (i == E1000_HI_COMMAND_TIMEOUT) { 570 DEBUGOUT("New FW did not start within timeout period.\n"); 571 return -E1000_ERR_HOST_INTERFACE_COMMAND; 572 } 573 574 return E1000_SUCCESS; 575 } 576 577
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