i40e_nvm.c revision 292100
1/****************************************************************************** 2 3 Copyright (c) 2013-2015, 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: stable/10/sys/dev/ixl/i40e_nvm.c 292100 2015-12-11 13:08:38Z smh $*/ 34 35#include "i40e_prototype.h" 36 37enum i40e_status_code i40e_read_nvm_word_srctl(struct i40e_hw *hw, u16 offset, 38 u16 *data); 39enum i40e_status_code i40e_read_nvm_word_aq(struct i40e_hw *hw, u16 offset, 40 u16 *data); 41enum i40e_status_code i40e_read_nvm_buffer_srctl(struct i40e_hw *hw, u16 offset, 42 u16 *words, u16 *data); 43enum i40e_status_code i40e_read_nvm_buffer_aq(struct i40e_hw *hw, u16 offset, 44 u16 *words, u16 *data); 45enum i40e_status_code i40e_read_nvm_aq(struct i40e_hw *hw, u8 module_pointer, 46 u32 offset, u16 words, void *data, 47 bool last_command); 48 49/** 50 * i40e_init_nvm_ops - Initialize NVM function pointers 51 * @hw: pointer to the HW structure 52 * 53 * Setup the function pointers and the NVM info structure. Should be called 54 * once per NVM initialization, e.g. inside the i40e_init_shared_code(). 55 * Please notice that the NVM term is used here (& in all methods covered 56 * in this file) as an equivalent of the FLASH part mapped into the SR. 57 * We are accessing FLASH always thru the Shadow RAM. 58 **/ 59enum i40e_status_code i40e_init_nvm(struct i40e_hw *hw) 60{ 61 struct i40e_nvm_info *nvm = &hw->nvm; 62 enum i40e_status_code ret_code = I40E_SUCCESS; 63 u32 fla, gens; 64 u8 sr_size; 65 66 DEBUGFUNC("i40e_init_nvm"); 67 68 /* The SR size is stored regardless of the nvm programming mode 69 * as the blank mode may be used in the factory line. 70 */ 71 gens = rd32(hw, I40E_GLNVM_GENS); 72 sr_size = ((gens & I40E_GLNVM_GENS_SR_SIZE_MASK) >> 73 I40E_GLNVM_GENS_SR_SIZE_SHIFT); 74 /* Switching to words (sr_size contains power of 2KB) */ 75 nvm->sr_size = BIT(sr_size) * I40E_SR_WORDS_IN_1KB; 76 77 /* Check if we are in the normal or blank NVM programming mode */ 78 fla = rd32(hw, I40E_GLNVM_FLA); 79 if (fla & I40E_GLNVM_FLA_LOCKED_MASK) { /* Normal programming mode */ 80 /* Max NVM timeout */ 81 nvm->timeout = I40E_MAX_NVM_TIMEOUT; 82 nvm->blank_nvm_mode = FALSE; 83 } else { /* Blank programming mode */ 84 nvm->blank_nvm_mode = TRUE; 85 ret_code = I40E_ERR_NVM_BLANK_MODE; 86 i40e_debug(hw, I40E_DEBUG_NVM, "NVM init error: unsupported blank mode.\n"); 87 } 88 89 return ret_code; 90} 91 92/** 93 * i40e_acquire_nvm - Generic request for acquiring the NVM ownership 94 * @hw: pointer to the HW structure 95 * @access: NVM access type (read or write) 96 * 97 * This function will request NVM ownership for reading 98 * via the proper Admin Command. 99 **/ 100enum i40e_status_code i40e_acquire_nvm(struct i40e_hw *hw, 101 enum i40e_aq_resource_access_type access) 102{ 103 enum i40e_status_code ret_code = I40E_SUCCESS; 104 u64 gtime, timeout; 105 u64 time_left = 0; 106 107 DEBUGFUNC("i40e_acquire_nvm"); 108 109 if (hw->nvm.blank_nvm_mode) 110 goto i40e_i40e_acquire_nvm_exit; 111 112 ret_code = i40e_aq_request_resource(hw, I40E_NVM_RESOURCE_ID, access, 113 0, &time_left, NULL); 114 /* Reading the Global Device Timer */ 115 gtime = rd32(hw, I40E_GLVFGEN_TIMER); 116 117 /* Store the timeout */ 118 hw->nvm.hw_semaphore_timeout = I40E_MS_TO_GTIME(time_left) + gtime; 119 120 if (ret_code) 121 i40e_debug(hw, I40E_DEBUG_NVM, 122 "NVM acquire type %d failed time_left=%llu ret=%d aq_err=%d\n", 123 access, time_left, ret_code, hw->aq.asq_last_status); 124 125 if (ret_code && time_left) { 126 /* Poll until the current NVM owner timeouts */ 127 timeout = I40E_MS_TO_GTIME(I40E_MAX_NVM_TIMEOUT) + gtime; 128 while ((gtime < timeout) && time_left) { 129 i40e_msec_delay(10); 130 gtime = rd32(hw, I40E_GLVFGEN_TIMER); 131 ret_code = i40e_aq_request_resource(hw, 132 I40E_NVM_RESOURCE_ID, 133 access, 0, &time_left, 134 NULL); 135 if (ret_code == I40E_SUCCESS) { 136 hw->nvm.hw_semaphore_timeout = 137 I40E_MS_TO_GTIME(time_left) + gtime; 138 break; 139 } 140 } 141 if (ret_code != I40E_SUCCESS) { 142 hw->nvm.hw_semaphore_timeout = 0; 143 i40e_debug(hw, I40E_DEBUG_NVM, 144 "NVM acquire timed out, wait %llu ms before trying again. status=%d aq_err=%d\n", 145 time_left, ret_code, hw->aq.asq_last_status); 146 } 147 } 148 149i40e_i40e_acquire_nvm_exit: 150 return ret_code; 151} 152 153/** 154 * i40e_release_nvm - Generic request for releasing the NVM ownership 155 * @hw: pointer to the HW structure 156 * 157 * This function will release NVM resource via the proper Admin Command. 158 **/ 159void i40e_release_nvm(struct i40e_hw *hw) 160{ 161 enum i40e_status_code ret_code = I40E_SUCCESS; 162 u32 total_delay = 0; 163 164 DEBUGFUNC("i40e_release_nvm"); 165 166 if (hw->nvm.blank_nvm_mode) 167 return; 168 169 ret_code = i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL); 170 171 /* there are some rare cases when trying to release the resource 172 * results in an admin Q timeout, so handle them correctly 173 */ 174 while ((ret_code == I40E_ERR_ADMIN_QUEUE_TIMEOUT) && 175 (total_delay < hw->aq.asq_cmd_timeout)) { 176 i40e_msec_delay(1); 177 ret_code = i40e_aq_release_resource(hw, 178 I40E_NVM_RESOURCE_ID, 0, NULL); 179 total_delay++; 180 } 181} 182 183/** 184 * i40e_poll_sr_srctl_done_bit - Polls the GLNVM_SRCTL done bit 185 * @hw: pointer to the HW structure 186 * 187 * Polls the SRCTL Shadow RAM register done bit. 188 **/ 189static enum i40e_status_code i40e_poll_sr_srctl_done_bit(struct i40e_hw *hw) 190{ 191 enum i40e_status_code ret_code = I40E_ERR_TIMEOUT; 192 u32 srctl, wait_cnt; 193 194 DEBUGFUNC("i40e_poll_sr_srctl_done_bit"); 195 196 /* Poll the I40E_GLNVM_SRCTL until the done bit is set */ 197 for (wait_cnt = 0; wait_cnt < I40E_SRRD_SRCTL_ATTEMPTS; wait_cnt++) { 198 srctl = rd32(hw, I40E_GLNVM_SRCTL); 199 if (srctl & I40E_GLNVM_SRCTL_DONE_MASK) { 200 ret_code = I40E_SUCCESS; 201 break; 202 } 203 i40e_usec_delay(5); 204 } 205 if (ret_code == I40E_ERR_TIMEOUT) 206 i40e_debug(hw, I40E_DEBUG_NVM, "Done bit in GLNVM_SRCTL not set"); 207 return ret_code; 208} 209 210/** 211 * i40e_read_nvm_word - Reads Shadow RAM 212 * @hw: pointer to the HW structure 213 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF) 214 * @data: word read from the Shadow RAM 215 * 216 * Reads one 16 bit word from the Shadow RAM using the GLNVM_SRCTL register. 217 **/ 218enum i40e_status_code i40e_read_nvm_word(struct i40e_hw *hw, u16 offset, 219 u16 *data) 220{ 221#ifdef X722_SUPPORT 222 if (hw->mac.type == I40E_MAC_X722) 223 return i40e_read_nvm_word_aq(hw, offset, data); 224#endif 225 return i40e_read_nvm_word_srctl(hw, offset, data); 226} 227 228/** 229 * i40e_read_nvm_word_srctl - Reads Shadow RAM via SRCTL register 230 * @hw: pointer to the HW structure 231 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF) 232 * @data: word read from the Shadow RAM 233 * 234 * Reads one 16 bit word from the Shadow RAM using the GLNVM_SRCTL register. 235 **/ 236enum i40e_status_code i40e_read_nvm_word_srctl(struct i40e_hw *hw, u16 offset, 237 u16 *data) 238{ 239 enum i40e_status_code ret_code = I40E_ERR_TIMEOUT; 240 u32 sr_reg; 241 242 DEBUGFUNC("i40e_read_nvm_word_srctl"); 243 244 if (offset >= hw->nvm.sr_size) { 245 i40e_debug(hw, I40E_DEBUG_NVM, 246 "NVM read error: Offset %d beyond Shadow RAM limit %d\n", 247 offset, hw->nvm.sr_size); 248 ret_code = I40E_ERR_PARAM; 249 goto read_nvm_exit; 250 } 251 252 /* Poll the done bit first */ 253 ret_code = i40e_poll_sr_srctl_done_bit(hw); 254 if (ret_code == I40E_SUCCESS) { 255 /* Write the address and start reading */ 256 sr_reg = ((u32)offset << I40E_GLNVM_SRCTL_ADDR_SHIFT) | 257 BIT(I40E_GLNVM_SRCTL_START_SHIFT); 258 wr32(hw, I40E_GLNVM_SRCTL, sr_reg); 259 260 /* Poll I40E_GLNVM_SRCTL until the done bit is set */ 261 ret_code = i40e_poll_sr_srctl_done_bit(hw); 262 if (ret_code == I40E_SUCCESS) { 263 sr_reg = rd32(hw, I40E_GLNVM_SRDATA); 264 *data = (u16)((sr_reg & 265 I40E_GLNVM_SRDATA_RDDATA_MASK) 266 >> I40E_GLNVM_SRDATA_RDDATA_SHIFT); 267 } 268 } 269 if (ret_code != I40E_SUCCESS) 270 i40e_debug(hw, I40E_DEBUG_NVM, 271 "NVM read error: Couldn't access Shadow RAM address: 0x%x\n", 272 offset); 273 274read_nvm_exit: 275 return ret_code; 276} 277 278/** 279 * i40e_read_nvm_word_aq - Reads Shadow RAM via AQ 280 * @hw: pointer to the HW structure 281 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF) 282 * @data: word read from the Shadow RAM 283 * 284 * Reads one 16 bit word from the Shadow RAM using the GLNVM_SRCTL register. 285 **/ 286enum i40e_status_code i40e_read_nvm_word_aq(struct i40e_hw *hw, u16 offset, 287 u16 *data) 288{ 289 enum i40e_status_code ret_code = I40E_ERR_TIMEOUT; 290 291 DEBUGFUNC("i40e_read_nvm_word_aq"); 292 293 ret_code = i40e_read_nvm_aq(hw, 0x0, offset, 1, data, TRUE); 294 *data = LE16_TO_CPU(*(__le16 *)data); 295 296 return ret_code; 297} 298 299/** 300 * i40e_read_nvm_buffer - Reads Shadow RAM buffer 301 * @hw: pointer to the HW structure 302 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF). 303 * @words: (in) number of words to read; (out) number of words actually read 304 * @data: words read from the Shadow RAM 305 * 306 * Reads 16 bit words (data buffer) from the SR using the i40e_read_nvm_srrd() 307 * method. The buffer read is preceded by the NVM ownership take 308 * and followed by the release. 309 **/ 310enum i40e_status_code i40e_read_nvm_buffer(struct i40e_hw *hw, u16 offset, 311 u16 *words, u16 *data) 312{ 313#ifdef X722_SUPPORT 314 if (hw->mac.type == I40E_MAC_X722) 315 return i40e_read_nvm_buffer_aq(hw, offset, words, data); 316#endif 317 return i40e_read_nvm_buffer_srctl(hw, offset, words, data); 318} 319 320/** 321 * i40e_read_nvm_buffer_srctl - Reads Shadow RAM buffer via SRCTL register 322 * @hw: pointer to the HW structure 323 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF). 324 * @words: (in) number of words to read; (out) number of words actually read 325 * @data: words read from the Shadow RAM 326 * 327 * Reads 16 bit words (data buffer) from the SR using the i40e_read_nvm_srrd() 328 * method. The buffer read is preceded by the NVM ownership take 329 * and followed by the release. 330 **/ 331enum i40e_status_code i40e_read_nvm_buffer_srctl(struct i40e_hw *hw, u16 offset, 332 u16 *words, u16 *data) 333{ 334 enum i40e_status_code ret_code = I40E_SUCCESS; 335 u16 index, word; 336 337 DEBUGFUNC("i40e_read_nvm_buffer_srctl"); 338 339 /* Loop thru the selected region */ 340 for (word = 0; word < *words; word++) { 341 index = offset + word; 342 ret_code = i40e_read_nvm_word_srctl(hw, index, &data[word]); 343 if (ret_code != I40E_SUCCESS) 344 break; 345 } 346 347 /* Update the number of words read from the Shadow RAM */ 348 *words = word; 349 350 return ret_code; 351} 352 353/** 354 * i40e_read_nvm_buffer_aq - Reads Shadow RAM buffer via AQ 355 * @hw: pointer to the HW structure 356 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF). 357 * @words: (in) number of words to read; (out) number of words actually read 358 * @data: words read from the Shadow RAM 359 * 360 * Reads 16 bit words (data buffer) from the SR using the i40e_read_nvm_aq() 361 * method. The buffer read is preceded by the NVM ownership take 362 * and followed by the release. 363 **/ 364enum i40e_status_code i40e_read_nvm_buffer_aq(struct i40e_hw *hw, u16 offset, 365 u16 *words, u16 *data) 366{ 367 enum i40e_status_code ret_code; 368 u16 read_size = *words; 369 bool last_cmd = FALSE; 370 u16 words_read = 0; 371 u16 i = 0; 372 373 DEBUGFUNC("i40e_read_nvm_buffer_aq"); 374 375 do { 376 /* Calculate number of bytes we should read in this step. 377 * FVL AQ do not allow to read more than one page at a time or 378 * to cross page boundaries. 379 */ 380 if (offset % I40E_SR_SECTOR_SIZE_IN_WORDS) 381 read_size = min(*words, 382 (u16)(I40E_SR_SECTOR_SIZE_IN_WORDS - 383 (offset % I40E_SR_SECTOR_SIZE_IN_WORDS))); 384 else 385 read_size = min((*words - words_read), 386 I40E_SR_SECTOR_SIZE_IN_WORDS); 387 388 /* Check if this is last command, if so set proper flag */ 389 if ((words_read + read_size) >= *words) 390 last_cmd = TRUE; 391 392 ret_code = i40e_read_nvm_aq(hw, 0x0, offset, read_size, 393 data + words_read, last_cmd); 394 if (ret_code != I40E_SUCCESS) 395 goto read_nvm_buffer_aq_exit; 396 397 /* Increment counter for words already read and move offset to 398 * new read location 399 */ 400 words_read += read_size; 401 offset += read_size; 402 } while (words_read < *words); 403 404 for (i = 0; i < *words; i++) 405 data[i] = LE16_TO_CPU(((__le16 *)data)[i]); 406 407read_nvm_buffer_aq_exit: 408 *words = words_read; 409 return ret_code; 410} 411 412/** 413 * i40e_read_nvm_aq - Read Shadow RAM. 414 * @hw: pointer to the HW structure. 415 * @module_pointer: module pointer location in words from the NVM beginning 416 * @offset: offset in words from module start 417 * @words: number of words to write 418 * @data: buffer with words to write to the Shadow RAM 419 * @last_command: tells the AdminQ that this is the last command 420 * 421 * Writes a 16 bit words buffer to the Shadow RAM using the admin command. 422 **/ 423enum i40e_status_code i40e_read_nvm_aq(struct i40e_hw *hw, u8 module_pointer, 424 u32 offset, u16 words, void *data, 425 bool last_command) 426{ 427 enum i40e_status_code ret_code = I40E_ERR_NVM; 428 struct i40e_asq_cmd_details cmd_details; 429 430 DEBUGFUNC("i40e_read_nvm_aq"); 431 432 memset(&cmd_details, 0, sizeof(cmd_details)); 433 cmd_details.wb_desc = &hw->nvm_wb_desc; 434 435 /* Here we are checking the SR limit only for the flat memory model. 436 * We cannot do it for the module-based model, as we did not acquire 437 * the NVM resource yet (we cannot get the module pointer value). 438 * Firmware will check the module-based model. 439 */ 440 if ((offset + words) > hw->nvm.sr_size) 441 i40e_debug(hw, I40E_DEBUG_NVM, 442 "NVM write error: offset %d beyond Shadow RAM limit %d\n", 443 (offset + words), hw->nvm.sr_size); 444 else if (words > I40E_SR_SECTOR_SIZE_IN_WORDS) 445 /* We can write only up to 4KB (one sector), in one AQ write */ 446 i40e_debug(hw, I40E_DEBUG_NVM, 447 "NVM write fail error: tried to write %d words, limit is %d.\n", 448 words, I40E_SR_SECTOR_SIZE_IN_WORDS); 449 else if (((offset + (words - 1)) / I40E_SR_SECTOR_SIZE_IN_WORDS) 450 != (offset / I40E_SR_SECTOR_SIZE_IN_WORDS)) 451 /* A single write cannot spread over two sectors */ 452 i40e_debug(hw, I40E_DEBUG_NVM, 453 "NVM write error: cannot spread over two sectors in a single write offset=%d words=%d\n", 454 offset, words); 455 else 456 ret_code = i40e_aq_read_nvm(hw, module_pointer, 457 2 * offset, /*bytes*/ 458 2 * words, /*bytes*/ 459 data, last_command, &cmd_details); 460 461 return ret_code; 462} 463 464/** 465 * i40e_write_nvm_aq - Writes Shadow RAM. 466 * @hw: pointer to the HW structure. 467 * @module_pointer: module pointer location in words from the NVM beginning 468 * @offset: offset in words from module start 469 * @words: number of words to write 470 * @data: buffer with words to write to the Shadow RAM 471 * @last_command: tells the AdminQ that this is the last command 472 * 473 * Writes a 16 bit words buffer to the Shadow RAM using the admin command. 474 **/ 475enum i40e_status_code i40e_write_nvm_aq(struct i40e_hw *hw, u8 module_pointer, 476 u32 offset, u16 words, void *data, 477 bool last_command) 478{ 479 enum i40e_status_code ret_code = I40E_ERR_NVM; 480 struct i40e_asq_cmd_details cmd_details; 481 482 DEBUGFUNC("i40e_write_nvm_aq"); 483 484 memset(&cmd_details, 0, sizeof(cmd_details)); 485 cmd_details.wb_desc = &hw->nvm_wb_desc; 486 487 /* Here we are checking the SR limit only for the flat memory model. 488 * We cannot do it for the module-based model, as we did not acquire 489 * the NVM resource yet (we cannot get the module pointer value). 490 * Firmware will check the module-based model. 491 */ 492 if ((offset + words) > hw->nvm.sr_size) 493 DEBUGOUT("NVM write error: offset beyond Shadow RAM limit.\n"); 494 else if (words > I40E_SR_SECTOR_SIZE_IN_WORDS) 495 /* We can write only up to 4KB (one sector), in one AQ write */ 496 DEBUGOUT("NVM write fail error: cannot write more than 4KB in a single write.\n"); 497 else if (((offset + (words - 1)) / I40E_SR_SECTOR_SIZE_IN_WORDS) 498 != (offset / I40E_SR_SECTOR_SIZE_IN_WORDS)) 499 /* A single write cannot spread over two sectors */ 500 DEBUGOUT("NVM write error: cannot spread over two sectors in a single write.\n"); 501 else 502 ret_code = i40e_aq_update_nvm(hw, module_pointer, 503 2 * offset, /*bytes*/ 504 2 * words, /*bytes*/ 505 data, last_command, &cmd_details); 506 507 return ret_code; 508} 509 510/** 511 * i40e_write_nvm_word - Writes Shadow RAM word 512 * @hw: pointer to the HW structure 513 * @offset: offset of the Shadow RAM word to write 514 * @data: word to write to the Shadow RAM 515 * 516 * Writes a 16 bit word to the SR using the i40e_write_nvm_aq() method. 517 * NVM ownership have to be acquired and released (on ARQ completion event 518 * reception) by caller. To commit SR to NVM update checksum function 519 * should be called. 520 **/ 521enum i40e_status_code i40e_write_nvm_word(struct i40e_hw *hw, u32 offset, 522 void *data) 523{ 524 DEBUGFUNC("i40e_write_nvm_word"); 525 526 *((__le16 *)data) = CPU_TO_LE16(*((u16 *)data)); 527 528 /* Value 0x00 below means that we treat SR as a flat mem */ 529 return i40e_write_nvm_aq(hw, 0x00, offset, 1, data, FALSE); 530} 531 532/** 533 * i40e_write_nvm_buffer - Writes Shadow RAM buffer 534 * @hw: pointer to the HW structure 535 * @module_pointer: module pointer location in words from the NVM beginning 536 * @offset: offset of the Shadow RAM buffer to write 537 * @words: number of words to write 538 * @data: words to write to the Shadow RAM 539 * 540 * Writes a 16 bit words buffer to the Shadow RAM using the admin command. 541 * NVM ownership must be acquired before calling this function and released 542 * on ARQ completion event reception by caller. To commit SR to NVM update 543 * checksum function should be called. 544 **/ 545enum i40e_status_code i40e_write_nvm_buffer(struct i40e_hw *hw, 546 u8 module_pointer, u32 offset, 547 u16 words, void *data) 548{ 549 __le16 *le_word_ptr = (__le16 *)data; 550 u16 *word_ptr = (u16 *)data; 551 u32 i = 0; 552 553 DEBUGFUNC("i40e_write_nvm_buffer"); 554 555 for (i = 0; i < words; i++) 556 le_word_ptr[i] = CPU_TO_LE16(word_ptr[i]); 557 558 /* Here we will only write one buffer as the size of the modules 559 * mirrored in the Shadow RAM is always less than 4K. 560 */ 561 return i40e_write_nvm_aq(hw, module_pointer, offset, words, 562 data, FALSE); 563} 564 565/** 566 * i40e_calc_nvm_checksum - Calculates and returns the checksum 567 * @hw: pointer to hardware structure 568 * @checksum: pointer to the checksum 569 * 570 * This function calculates SW Checksum that covers the whole 64kB shadow RAM 571 * except the VPD and PCIe ALT Auto-load modules. The structure and size of VPD 572 * is customer specific and unknown. Therefore, this function skips all maximum 573 * possible size of VPD (1kB). 574 **/ 575enum i40e_status_code i40e_calc_nvm_checksum(struct i40e_hw *hw, u16 *checksum) 576{ 577 enum i40e_status_code ret_code = I40E_SUCCESS; 578 struct i40e_virt_mem vmem; 579 u16 pcie_alt_module = 0; 580 u16 checksum_local = 0; 581 u16 vpd_module = 0; 582 u16 *data; 583 u16 i = 0; 584 585 DEBUGFUNC("i40e_calc_nvm_checksum"); 586 587 ret_code = i40e_allocate_virt_mem(hw, &vmem, 588 I40E_SR_SECTOR_SIZE_IN_WORDS * sizeof(u16)); 589 if (ret_code) 590 goto i40e_calc_nvm_checksum_exit; 591 data = (u16 *)vmem.va; 592 593 /* read pointer to VPD area */ 594 ret_code = i40e_read_nvm_word(hw, I40E_SR_VPD_PTR, &vpd_module); 595 if (ret_code != I40E_SUCCESS) { 596 ret_code = I40E_ERR_NVM_CHECKSUM; 597 goto i40e_calc_nvm_checksum_exit; 598 } 599 600 /* read pointer to PCIe Alt Auto-load module */ 601 ret_code = i40e_read_nvm_word(hw, I40E_SR_PCIE_ALT_AUTO_LOAD_PTR, 602 &pcie_alt_module); 603 if (ret_code != I40E_SUCCESS) { 604 ret_code = I40E_ERR_NVM_CHECKSUM; 605 goto i40e_calc_nvm_checksum_exit; 606 } 607 608 /* Calculate SW checksum that covers the whole 64kB shadow RAM 609 * except the VPD and PCIe ALT Auto-load modules 610 */ 611 for (i = 0; i < hw->nvm.sr_size; i++) { 612 /* Read SR page */ 613 if ((i % I40E_SR_SECTOR_SIZE_IN_WORDS) == 0) { 614 u16 words = I40E_SR_SECTOR_SIZE_IN_WORDS; 615 616 ret_code = i40e_read_nvm_buffer(hw, i, &words, data); 617 if (ret_code != I40E_SUCCESS) { 618 ret_code = I40E_ERR_NVM_CHECKSUM; 619 goto i40e_calc_nvm_checksum_exit; 620 } 621 } 622 623 /* Skip Checksum word */ 624 if (i == I40E_SR_SW_CHECKSUM_WORD) 625 continue; 626 /* Skip VPD module (convert byte size to word count) */ 627 if ((i >= (u32)vpd_module) && 628 (i < ((u32)vpd_module + 629 (I40E_SR_VPD_MODULE_MAX_SIZE / 2)))) { 630 continue; 631 } 632 /* Skip PCIe ALT module (convert byte size to word count) */ 633 if ((i >= (u32)pcie_alt_module) && 634 (i < ((u32)pcie_alt_module + 635 (I40E_SR_PCIE_ALT_MODULE_MAX_SIZE / 2)))) { 636 continue; 637 } 638 639 checksum_local += data[i % I40E_SR_SECTOR_SIZE_IN_WORDS]; 640 } 641 642 *checksum = (u16)I40E_SR_SW_CHECKSUM_BASE - checksum_local; 643 644i40e_calc_nvm_checksum_exit: 645 i40e_free_virt_mem(hw, &vmem); 646 return ret_code; 647} 648 649/** 650 * i40e_update_nvm_checksum - Updates the NVM checksum 651 * @hw: pointer to hardware structure 652 * 653 * NVM ownership must be acquired before calling this function and released 654 * on ARQ completion event reception by caller. 655 * This function will commit SR to NVM. 656 **/ 657enum i40e_status_code i40e_update_nvm_checksum(struct i40e_hw *hw) 658{ 659 enum i40e_status_code ret_code = I40E_SUCCESS; 660 u16 checksum; 661 __le16 le_sum; 662 663 DEBUGFUNC("i40e_update_nvm_checksum"); 664 665 ret_code = i40e_calc_nvm_checksum(hw, &checksum); 666 le_sum = CPU_TO_LE16(checksum); 667 if (ret_code == I40E_SUCCESS) 668 ret_code = i40e_write_nvm_aq(hw, 0x00, I40E_SR_SW_CHECKSUM_WORD, 669 1, &le_sum, TRUE); 670 671 return ret_code; 672} 673 674/** 675 * i40e_validate_nvm_checksum - Validate EEPROM checksum 676 * @hw: pointer to hardware structure 677 * @checksum: calculated checksum 678 * 679 * Performs checksum calculation and validates the NVM SW checksum. If the 680 * caller does not need checksum, the value can be NULL. 681 **/ 682enum i40e_status_code i40e_validate_nvm_checksum(struct i40e_hw *hw, 683 u16 *checksum) 684{ 685 enum i40e_status_code ret_code = I40E_SUCCESS; 686 u16 checksum_sr = 0; 687 u16 checksum_local = 0; 688 689 DEBUGFUNC("i40e_validate_nvm_checksum"); 690 691 ret_code = i40e_calc_nvm_checksum(hw, &checksum_local); 692 if (ret_code != I40E_SUCCESS) 693 goto i40e_validate_nvm_checksum_exit; 694 695 /* Do not use i40e_read_nvm_word() because we do not want to take 696 * the synchronization semaphores twice here. 697 */ 698 i40e_read_nvm_word(hw, I40E_SR_SW_CHECKSUM_WORD, &checksum_sr); 699 700 /* Verify read checksum from EEPROM is the same as 701 * calculated checksum 702 */ 703 if (checksum_local != checksum_sr) 704 ret_code = I40E_ERR_NVM_CHECKSUM; 705 706 /* If the user cares, return the calculated checksum */ 707 if (checksum) 708 *checksum = checksum_local; 709 710i40e_validate_nvm_checksum_exit: 711 return ret_code; 712} 713