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i40e/i40evf: Refactor i40e_debug_aq and make some functions static
[deliverable/linux.git] / drivers / net / ethernet / intel / i40e / i40e_nvm.c
1 /*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Driver
4 * Copyright(c) 2013 - 2014 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
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27 #include "i40e_prototype.h"
28
29 /**
30 * i40e_init_nvm_ops - Initialize NVM function pointers
31 * @hw: pointer to the HW structure
32 *
33 * Setup the function pointers and the NVM info structure. Should be called
34 * once per NVM initialization, e.g. inside the i40e_init_shared_code().
35 * Please notice that the NVM term is used here (& in all methods covered
36 * in this file) as an equivalent of the FLASH part mapped into the SR.
37 * We are accessing FLASH always thru the Shadow RAM.
38 **/
39 i40e_status i40e_init_nvm(struct i40e_hw *hw)
40 {
41 struct i40e_nvm_info *nvm = &hw->nvm;
42 i40e_status ret_code = 0;
43 u32 fla, gens;
44 u8 sr_size;
45
46 /* The SR size is stored regardless of the nvm programming mode
47 * as the blank mode may be used in the factory line.
48 */
49 gens = rd32(hw, I40E_GLNVM_GENS);
50 sr_size = ((gens & I40E_GLNVM_GENS_SR_SIZE_MASK) >>
51 I40E_GLNVM_GENS_SR_SIZE_SHIFT);
52 /* Switching to words (sr_size contains power of 2KB) */
53 nvm->sr_size = (1 << sr_size) * I40E_SR_WORDS_IN_1KB;
54
55 /* Check if we are in the normal or blank NVM programming mode */
56 fla = rd32(hw, I40E_GLNVM_FLA);
57 if (fla & I40E_GLNVM_FLA_LOCKED_MASK) { /* Normal programming mode */
58 /* Max NVM timeout */
59 nvm->timeout = I40E_MAX_NVM_TIMEOUT;
60 nvm->blank_nvm_mode = false;
61 } else { /* Blank programming mode */
62 nvm->blank_nvm_mode = true;
63 ret_code = I40E_ERR_NVM_BLANK_MODE;
64 i40e_debug(hw, I40E_DEBUG_NVM, "NVM init error: unsupported blank mode.\n");
65 }
66
67 return ret_code;
68 }
69
70 /**
71 * i40e_acquire_nvm - Generic request for acquiring the NVM ownership
72 * @hw: pointer to the HW structure
73 * @access: NVM access type (read or write)
74 *
75 * This function will request NVM ownership for reading
76 * via the proper Admin Command.
77 **/
78 i40e_status i40e_acquire_nvm(struct i40e_hw *hw,
79 enum i40e_aq_resource_access_type access)
80 {
81 i40e_status ret_code = 0;
82 u64 gtime, timeout;
83 u64 time_left = 0;
84
85 if (hw->nvm.blank_nvm_mode)
86 goto i40e_i40e_acquire_nvm_exit;
87
88 ret_code = i40e_aq_request_resource(hw, I40E_NVM_RESOURCE_ID, access,
89 0, &time_left, NULL);
90 /* Reading the Global Device Timer */
91 gtime = rd32(hw, I40E_GLVFGEN_TIMER);
92
93 /* Store the timeout */
94 hw->nvm.hw_semaphore_timeout = I40E_MS_TO_GTIME(time_left) + gtime;
95
96 if (ret_code)
97 i40e_debug(hw, I40E_DEBUG_NVM,
98 "NVM acquire type %d failed time_left=%llu ret=%d aq_err=%d\n",
99 access, time_left, ret_code, hw->aq.asq_last_status);
100
101 if (ret_code && time_left) {
102 /* Poll until the current NVM owner timeouts */
103 timeout = I40E_MS_TO_GTIME(I40E_MAX_NVM_TIMEOUT) + gtime;
104 while ((gtime < timeout) && time_left) {
105 usleep_range(10000, 20000);
106 gtime = rd32(hw, I40E_GLVFGEN_TIMER);
107 ret_code = i40e_aq_request_resource(hw,
108 I40E_NVM_RESOURCE_ID,
109 access, 0, &time_left,
110 NULL);
111 if (!ret_code) {
112 hw->nvm.hw_semaphore_timeout =
113 I40E_MS_TO_GTIME(time_left) + gtime;
114 break;
115 }
116 }
117 if (ret_code) {
118 hw->nvm.hw_semaphore_timeout = 0;
119 i40e_debug(hw, I40E_DEBUG_NVM,
120 "NVM acquire timed out, wait %llu ms before trying again. status=%d aq_err=%d\n",
121 time_left, ret_code, hw->aq.asq_last_status);
122 }
123 }
124
125 i40e_i40e_acquire_nvm_exit:
126 return ret_code;
127 }
128
129 /**
130 * i40e_release_nvm - Generic request for releasing the NVM ownership
131 * @hw: pointer to the HW structure
132 *
133 * This function will release NVM resource via the proper Admin Command.
134 **/
135 void i40e_release_nvm(struct i40e_hw *hw)
136 {
137 if (!hw->nvm.blank_nvm_mode)
138 i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
139 }
140
141 /**
142 * i40e_poll_sr_srctl_done_bit - Polls the GLNVM_SRCTL done bit
143 * @hw: pointer to the HW structure
144 *
145 * Polls the SRCTL Shadow RAM register done bit.
146 **/
147 static i40e_status i40e_poll_sr_srctl_done_bit(struct i40e_hw *hw)
148 {
149 i40e_status ret_code = I40E_ERR_TIMEOUT;
150 u32 srctl, wait_cnt;
151
152 /* Poll the I40E_GLNVM_SRCTL until the done bit is set */
153 for (wait_cnt = 0; wait_cnt < I40E_SRRD_SRCTL_ATTEMPTS; wait_cnt++) {
154 srctl = rd32(hw, I40E_GLNVM_SRCTL);
155 if (srctl & I40E_GLNVM_SRCTL_DONE_MASK) {
156 ret_code = 0;
157 break;
158 }
159 udelay(5);
160 }
161 if (ret_code == I40E_ERR_TIMEOUT)
162 i40e_debug(hw, I40E_DEBUG_NVM, "Done bit in GLNVM_SRCTL not set");
163 return ret_code;
164 }
165
166 /**
167 * i40e_read_nvm_word_srctl - Reads Shadow RAM via SRCTL register
168 * @hw: pointer to the HW structure
169 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF)
170 * @data: word read from the Shadow RAM
171 *
172 * Reads one 16 bit word from the Shadow RAM using the GLNVM_SRCTL register.
173 **/
174 static i40e_status i40e_read_nvm_word_srctl(struct i40e_hw *hw, u16 offset,
175 u16 *data)
176 {
177 i40e_status ret_code = I40E_ERR_TIMEOUT;
178 u32 sr_reg;
179
180 if (offset >= hw->nvm.sr_size) {
181 i40e_debug(hw, I40E_DEBUG_NVM,
182 "NVM read error: offset %d beyond Shadow RAM limit %d\n",
183 offset, hw->nvm.sr_size);
184 ret_code = I40E_ERR_PARAM;
185 goto read_nvm_exit;
186 }
187
188 /* Poll the done bit first */
189 ret_code = i40e_poll_sr_srctl_done_bit(hw);
190 if (!ret_code) {
191 /* Write the address and start reading */
192 sr_reg = (u32)(offset << I40E_GLNVM_SRCTL_ADDR_SHIFT) |
193 (1 << I40E_GLNVM_SRCTL_START_SHIFT);
194 wr32(hw, I40E_GLNVM_SRCTL, sr_reg);
195
196 /* Poll I40E_GLNVM_SRCTL until the done bit is set */
197 ret_code = i40e_poll_sr_srctl_done_bit(hw);
198 if (!ret_code) {
199 sr_reg = rd32(hw, I40E_GLNVM_SRDATA);
200 *data = (u16)((sr_reg &
201 I40E_GLNVM_SRDATA_RDDATA_MASK)
202 >> I40E_GLNVM_SRDATA_RDDATA_SHIFT);
203 *data = le16_to_cpu(*data);
204 }
205 }
206 if (ret_code)
207 i40e_debug(hw, I40E_DEBUG_NVM,
208 "NVM read error: Couldn't access Shadow RAM address: 0x%x\n",
209 offset);
210
211 read_nvm_exit:
212 return ret_code;
213 }
214
215 /**
216 * i40e_read_nvm_word - Reads Shadow RAM
217 * @hw: pointer to the HW structure
218 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF)
219 * @data: word read from the Shadow RAM
220 *
221 * Reads one 16 bit word from the Shadow RAM using the GLNVM_SRCTL register.
222 **/
223 i40e_status i40e_read_nvm_word(struct i40e_hw *hw, u16 offset,
224 u16 *data)
225 {
226 return i40e_read_nvm_word_srctl(hw, offset, data);
227 }
228
229 /**
230 * i40e_read_nvm_buffer_srctl - Reads Shadow RAM buffer via SRCTL register
231 * @hw: pointer to the HW structure
232 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF).
233 * @words: (in) number of words to read; (out) number of words actually read
234 * @data: words read from the Shadow RAM
235 *
236 * Reads 16 bit words (data buffer) from the SR using the i40e_read_nvm_srrd()
237 * method. The buffer read is preceded by the NVM ownership take
238 * and followed by the release.
239 **/
240 static i40e_status i40e_read_nvm_buffer_srctl(struct i40e_hw *hw, u16 offset,
241 u16 *words, u16 *data)
242 {
243 i40e_status ret_code = 0;
244 u16 index, word;
245
246 /* Loop thru the selected region */
247 for (word = 0; word < *words; word++) {
248 index = offset + word;
249 ret_code = i40e_read_nvm_word_srctl(hw, index, &data[word]);
250 if (ret_code)
251 break;
252 }
253
254 /* Update the number of words read from the Shadow RAM */
255 *words = word;
256
257 return ret_code;
258 }
259
260 /**
261 * i40e_read_nvm_buffer - Reads Shadow RAM buffer
262 * @hw: pointer to the HW structure
263 * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF).
264 * @words: (in) number of words to read; (out) number of words actually read
265 * @data: words read from the Shadow RAM
266 *
267 * Reads 16 bit words (data buffer) from the SR using the i40e_read_nvm_srrd()
268 * method. The buffer read is preceded by the NVM ownership take
269 * and followed by the release.
270 **/
271 i40e_status i40e_read_nvm_buffer(struct i40e_hw *hw, u16 offset,
272 u16 *words, u16 *data)
273 {
274 return i40e_read_nvm_buffer_srctl(hw, offset, words, data);
275 }
276
277 /**
278 * i40e_write_nvm_aq - Writes Shadow RAM.
279 * @hw: pointer to the HW structure.
280 * @module_pointer: module pointer location in words from the NVM beginning
281 * @offset: offset in words from module start
282 * @words: number of words to write
283 * @data: buffer with words to write to the Shadow RAM
284 * @last_command: tells the AdminQ that this is the last command
285 *
286 * Writes a 16 bit words buffer to the Shadow RAM using the admin command.
287 **/
288 static i40e_status i40e_write_nvm_aq(struct i40e_hw *hw, u8 module_pointer,
289 u32 offset, u16 words, void *data,
290 bool last_command)
291 {
292 i40e_status ret_code = I40E_ERR_NVM;
293
294 /* Here we are checking the SR limit only for the flat memory model.
295 * We cannot do it for the module-based model, as we did not acquire
296 * the NVM resource yet (we cannot get the module pointer value).
297 * Firmware will check the module-based model.
298 */
299 if ((offset + words) > hw->nvm.sr_size)
300 i40e_debug(hw, I40E_DEBUG_NVM,
301 "NVM write error: offset %d beyond Shadow RAM limit %d\n",
302 (offset + words), hw->nvm.sr_size);
303 else if (words > I40E_SR_SECTOR_SIZE_IN_WORDS)
304 /* We can write only up to 4KB (one sector), in one AQ write */
305 i40e_debug(hw, I40E_DEBUG_NVM,
306 "NVM write fail error: tried to write %d words, limit is %d.\n",
307 words, I40E_SR_SECTOR_SIZE_IN_WORDS);
308 else if (((offset + (words - 1)) / I40E_SR_SECTOR_SIZE_IN_WORDS)
309 != (offset / I40E_SR_SECTOR_SIZE_IN_WORDS))
310 /* A single write cannot spread over two sectors */
311 i40e_debug(hw, I40E_DEBUG_NVM,
312 "NVM write error: cannot spread over two sectors in a single write offset=%d words=%d\n",
313 offset, words);
314 else
315 ret_code = i40e_aq_update_nvm(hw, module_pointer,
316 2 * offset, /*bytes*/
317 2 * words, /*bytes*/
318 data, last_command, NULL);
319
320 return ret_code;
321 }
322
323 /**
324 * i40e_calc_nvm_checksum - Calculates and returns the checksum
325 * @hw: pointer to hardware structure
326 * @checksum: pointer to the checksum
327 *
328 * This function calculates SW Checksum that covers the whole 64kB shadow RAM
329 * except the VPD and PCIe ALT Auto-load modules. The structure and size of VPD
330 * is customer specific and unknown. Therefore, this function skips all maximum
331 * possible size of VPD (1kB).
332 **/
333 static i40e_status i40e_calc_nvm_checksum(struct i40e_hw *hw,
334 u16 *checksum)
335 {
336 i40e_status ret_code = 0;
337 struct i40e_virt_mem vmem;
338 u16 pcie_alt_module = 0;
339 u16 checksum_local = 0;
340 u16 vpd_module = 0;
341 u16 *data;
342 u16 i = 0;
343
344 ret_code = i40e_allocate_virt_mem(hw, &vmem,
345 I40E_SR_SECTOR_SIZE_IN_WORDS * sizeof(u16));
346 if (ret_code)
347 goto i40e_calc_nvm_checksum_exit;
348 data = (u16 *)vmem.va;
349
350 /* read pointer to VPD area */
351 ret_code = i40e_read_nvm_word(hw, I40E_SR_VPD_PTR, &vpd_module);
352 if (ret_code) {
353 ret_code = I40E_ERR_NVM_CHECKSUM;
354 goto i40e_calc_nvm_checksum_exit;
355 }
356
357 /* read pointer to PCIe Alt Auto-load module */
358 ret_code = i40e_read_nvm_word(hw, I40E_SR_PCIE_ALT_AUTO_LOAD_PTR,
359 &pcie_alt_module);
360 if (ret_code) {
361 ret_code = I40E_ERR_NVM_CHECKSUM;
362 goto i40e_calc_nvm_checksum_exit;
363 }
364
365 /* Calculate SW checksum that covers the whole 64kB shadow RAM
366 * except the VPD and PCIe ALT Auto-load modules
367 */
368 for (i = 0; i < hw->nvm.sr_size; i++) {
369 /* Read SR page */
370 if ((i % I40E_SR_SECTOR_SIZE_IN_WORDS) == 0) {
371 u16 words = I40E_SR_SECTOR_SIZE_IN_WORDS;
372
373 ret_code = i40e_read_nvm_buffer(hw, i, &words, data);
374 if (ret_code) {
375 ret_code = I40E_ERR_NVM_CHECKSUM;
376 goto i40e_calc_nvm_checksum_exit;
377 }
378 }
379
380 /* Skip Checksum word */
381 if (i == I40E_SR_SW_CHECKSUM_WORD)
382 continue;
383 /* Skip VPD module (convert byte size to word count) */
384 if ((i >= (u32)vpd_module) &&
385 (i < ((u32)vpd_module +
386 (I40E_SR_VPD_MODULE_MAX_SIZE / 2)))) {
387 continue;
388 }
389 /* Skip PCIe ALT module (convert byte size to word count) */
390 if ((i >= (u32)pcie_alt_module) &&
391 (i < ((u32)pcie_alt_module +
392 (I40E_SR_PCIE_ALT_MODULE_MAX_SIZE / 2)))) {
393 continue;
394 }
395
396 checksum_local += data[i % I40E_SR_SECTOR_SIZE_IN_WORDS];
397 }
398
399 *checksum = (u16)I40E_SR_SW_CHECKSUM_BASE - checksum_local;
400
401 i40e_calc_nvm_checksum_exit:
402 i40e_free_virt_mem(hw, &vmem);
403 return ret_code;
404 }
405
406 /**
407 * i40e_update_nvm_checksum - Updates the NVM checksum
408 * @hw: pointer to hardware structure
409 *
410 * NVM ownership must be acquired before calling this function and released
411 * on ARQ completion event reception by caller.
412 * This function will commit SR to NVM.
413 **/
414 i40e_status i40e_update_nvm_checksum(struct i40e_hw *hw)
415 {
416 i40e_status ret_code = 0;
417 u16 checksum;
418
419 ret_code = i40e_calc_nvm_checksum(hw, &checksum);
420 if (!ret_code)
421 ret_code = i40e_write_nvm_aq(hw, 0x00, I40E_SR_SW_CHECKSUM_WORD,
422 1, &checksum, true);
423
424 return ret_code;
425 }
426
427 /**
428 * i40e_validate_nvm_checksum - Validate EEPROM checksum
429 * @hw: pointer to hardware structure
430 * @checksum: calculated checksum
431 *
432 * Performs checksum calculation and validates the NVM SW checksum. If the
433 * caller does not need checksum, the value can be NULL.
434 **/
435 i40e_status i40e_validate_nvm_checksum(struct i40e_hw *hw,
436 u16 *checksum)
437 {
438 i40e_status ret_code = 0;
439 u16 checksum_sr = 0;
440 u16 checksum_local = 0;
441
442 ret_code = i40e_calc_nvm_checksum(hw, &checksum_local);
443 if (ret_code)
444 goto i40e_validate_nvm_checksum_exit;
445
446 /* Do not use i40e_read_nvm_word() because we do not want to take
447 * the synchronization semaphores twice here.
448 */
449 i40e_read_nvm_word(hw, I40E_SR_SW_CHECKSUM_WORD, &checksum_sr);
450
451 /* Verify read checksum from EEPROM is the same as
452 * calculated checksum
453 */
454 if (checksum_local != checksum_sr)
455 ret_code = I40E_ERR_NVM_CHECKSUM;
456
457 /* If the user cares, return the calculated checksum */
458 if (checksum)
459 *checksum = checksum_local;
460
461 i40e_validate_nvm_checksum_exit:
462 return ret_code;
463 }
464
465 static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
466 struct i40e_nvm_access *cmd,
467 u8 *bytes, int *errno);
468 static i40e_status i40e_nvmupd_state_reading(struct i40e_hw *hw,
469 struct i40e_nvm_access *cmd,
470 u8 *bytes, int *errno);
471 static i40e_status i40e_nvmupd_state_writing(struct i40e_hw *hw,
472 struct i40e_nvm_access *cmd,
473 u8 *bytes, int *errno);
474 static enum i40e_nvmupd_cmd i40e_nvmupd_validate_command(struct i40e_hw *hw,
475 struct i40e_nvm_access *cmd,
476 int *errno);
477 static i40e_status i40e_nvmupd_nvm_erase(struct i40e_hw *hw,
478 struct i40e_nvm_access *cmd,
479 int *errno);
480 static i40e_status i40e_nvmupd_nvm_write(struct i40e_hw *hw,
481 struct i40e_nvm_access *cmd,
482 u8 *bytes, int *errno);
483 static i40e_status i40e_nvmupd_nvm_read(struct i40e_hw *hw,
484 struct i40e_nvm_access *cmd,
485 u8 *bytes, int *errno);
486 static inline u8 i40e_nvmupd_get_module(u32 val)
487 {
488 return (u8)(val & I40E_NVM_MOD_PNT_MASK);
489 }
490 static inline u8 i40e_nvmupd_get_transaction(u32 val)
491 {
492 return (u8)((val & I40E_NVM_TRANS_MASK) >> I40E_NVM_TRANS_SHIFT);
493 }
494
495 static char *i40e_nvm_update_state_str[] = {
496 "I40E_NVMUPD_INVALID",
497 "I40E_NVMUPD_READ_CON",
498 "I40E_NVMUPD_READ_SNT",
499 "I40E_NVMUPD_READ_LCB",
500 "I40E_NVMUPD_READ_SA",
501 "I40E_NVMUPD_WRITE_ERA",
502 "I40E_NVMUPD_WRITE_CON",
503 "I40E_NVMUPD_WRITE_SNT",
504 "I40E_NVMUPD_WRITE_LCB",
505 "I40E_NVMUPD_WRITE_SA",
506 "I40E_NVMUPD_CSUM_CON",
507 "I40E_NVMUPD_CSUM_SA",
508 "I40E_NVMUPD_CSUM_LCB",
509 };
510
511 /**
512 * i40e_nvmupd_command - Process an NVM update command
513 * @hw: pointer to hardware structure
514 * @cmd: pointer to nvm update command
515 * @bytes: pointer to the data buffer
516 * @errno: pointer to return error code
517 *
518 * Dispatches command depending on what update state is current
519 **/
520 i40e_status i40e_nvmupd_command(struct i40e_hw *hw,
521 struct i40e_nvm_access *cmd,
522 u8 *bytes, int *errno)
523 {
524 i40e_status status;
525
526 /* assume success */
527 *errno = 0;
528
529 switch (hw->nvmupd_state) {
530 case I40E_NVMUPD_STATE_INIT:
531 status = i40e_nvmupd_state_init(hw, cmd, bytes, errno);
532 break;
533
534 case I40E_NVMUPD_STATE_READING:
535 status = i40e_nvmupd_state_reading(hw, cmd, bytes, errno);
536 break;
537
538 case I40E_NVMUPD_STATE_WRITING:
539 status = i40e_nvmupd_state_writing(hw, cmd, bytes, errno);
540 break;
541
542 default:
543 /* invalid state, should never happen */
544 i40e_debug(hw, I40E_DEBUG_NVM,
545 "NVMUPD: no such state %d\n", hw->nvmupd_state);
546 status = I40E_NOT_SUPPORTED;
547 *errno = -ESRCH;
548 break;
549 }
550 return status;
551 }
552
553 /**
554 * i40e_nvmupd_state_init - Handle NVM update state Init
555 * @hw: pointer to hardware structure
556 * @cmd: pointer to nvm update command buffer
557 * @bytes: pointer to the data buffer
558 * @errno: pointer to return error code
559 *
560 * Process legitimate commands of the Init state and conditionally set next
561 * state. Reject all other commands.
562 **/
563 static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
564 struct i40e_nvm_access *cmd,
565 u8 *bytes, int *errno)
566 {
567 i40e_status status = 0;
568 enum i40e_nvmupd_cmd upd_cmd;
569
570 upd_cmd = i40e_nvmupd_validate_command(hw, cmd, errno);
571
572 switch (upd_cmd) {
573 case I40E_NVMUPD_READ_SA:
574 status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
575 if (status) {
576 *errno = i40e_aq_rc_to_posix(status,
577 hw->aq.asq_last_status);
578 } else {
579 status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
580 i40e_release_nvm(hw);
581 }
582 break;
583
584 case I40E_NVMUPD_READ_SNT:
585 status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
586 if (status) {
587 *errno = i40e_aq_rc_to_posix(status,
588 hw->aq.asq_last_status);
589 } else {
590 status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
591 if (status)
592 i40e_release_nvm(hw);
593 else
594 hw->nvmupd_state = I40E_NVMUPD_STATE_READING;
595 }
596 break;
597
598 case I40E_NVMUPD_WRITE_ERA:
599 status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
600 if (status) {
601 *errno = i40e_aq_rc_to_posix(status,
602 hw->aq.asq_last_status);
603 } else {
604 status = i40e_nvmupd_nvm_erase(hw, cmd, errno);
605 if (status)
606 i40e_release_nvm(hw);
607 else
608 hw->aq.nvm_release_on_done = true;
609 }
610 break;
611
612 case I40E_NVMUPD_WRITE_SA:
613 status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
614 if (status) {
615 *errno = i40e_aq_rc_to_posix(status,
616 hw->aq.asq_last_status);
617 } else {
618 status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
619 if (status)
620 i40e_release_nvm(hw);
621 else
622 hw->aq.nvm_release_on_done = true;
623 }
624 break;
625
626 case I40E_NVMUPD_WRITE_SNT:
627 status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
628 if (status) {
629 *errno = i40e_aq_rc_to_posix(status,
630 hw->aq.asq_last_status);
631 } else {
632 status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
633 if (status)
634 i40e_release_nvm(hw);
635 else
636 hw->nvmupd_state = I40E_NVMUPD_STATE_WRITING;
637 }
638 break;
639
640 case I40E_NVMUPD_CSUM_SA:
641 status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
642 if (status) {
643 *errno = i40e_aq_rc_to_posix(status,
644 hw->aq.asq_last_status);
645 } else {
646 status = i40e_update_nvm_checksum(hw);
647 if (status) {
648 *errno = hw->aq.asq_last_status ?
649 i40e_aq_rc_to_posix(status,
650 hw->aq.asq_last_status) :
651 -EIO;
652 i40e_release_nvm(hw);
653 } else {
654 hw->aq.nvm_release_on_done = true;
655 }
656 }
657 break;
658
659 default:
660 i40e_debug(hw, I40E_DEBUG_NVM,
661 "NVMUPD: bad cmd %s in init state\n",
662 i40e_nvm_update_state_str[upd_cmd]);
663 status = I40E_ERR_NVM;
664 *errno = -ESRCH;
665 break;
666 }
667 return status;
668 }
669
670 /**
671 * i40e_nvmupd_state_reading - Handle NVM update state Reading
672 * @hw: pointer to hardware structure
673 * @cmd: pointer to nvm update command buffer
674 * @bytes: pointer to the data buffer
675 * @errno: pointer to return error code
676 *
677 * NVM ownership is already held. Process legitimate commands and set any
678 * change in state; reject all other commands.
679 **/
680 static i40e_status i40e_nvmupd_state_reading(struct i40e_hw *hw,
681 struct i40e_nvm_access *cmd,
682 u8 *bytes, int *errno)
683 {
684 i40e_status status;
685 enum i40e_nvmupd_cmd upd_cmd;
686
687 upd_cmd = i40e_nvmupd_validate_command(hw, cmd, errno);
688
689 switch (upd_cmd) {
690 case I40E_NVMUPD_READ_SA:
691 case I40E_NVMUPD_READ_CON:
692 status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
693 break;
694
695 case I40E_NVMUPD_READ_LCB:
696 status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
697 i40e_release_nvm(hw);
698 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
699 break;
700
701 default:
702 i40e_debug(hw, I40E_DEBUG_NVM,
703 "NVMUPD: bad cmd %s in reading state.\n",
704 i40e_nvm_update_state_str[upd_cmd]);
705 status = I40E_NOT_SUPPORTED;
706 *errno = -ESRCH;
707 break;
708 }
709 return status;
710 }
711
712 /**
713 * i40e_nvmupd_state_writing - Handle NVM update state Writing
714 * @hw: pointer to hardware structure
715 * @cmd: pointer to nvm update command buffer
716 * @bytes: pointer to the data buffer
717 * @errno: pointer to return error code
718 *
719 * NVM ownership is already held. Process legitimate commands and set any
720 * change in state; reject all other commands
721 **/
722 static i40e_status i40e_nvmupd_state_writing(struct i40e_hw *hw,
723 struct i40e_nvm_access *cmd,
724 u8 *bytes, int *errno)
725 {
726 i40e_status status;
727 enum i40e_nvmupd_cmd upd_cmd;
728 bool retry_attempt = false;
729
730 upd_cmd = i40e_nvmupd_validate_command(hw, cmd, errno);
731
732 retry:
733 switch (upd_cmd) {
734 case I40E_NVMUPD_WRITE_CON:
735 status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
736 break;
737
738 case I40E_NVMUPD_WRITE_LCB:
739 status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
740 if (!status)
741 hw->aq.nvm_release_on_done = true;
742 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
743 break;
744
745 case I40E_NVMUPD_CSUM_CON:
746 status = i40e_update_nvm_checksum(hw);
747 if (status) {
748 *errno = hw->aq.asq_last_status ?
749 i40e_aq_rc_to_posix(status,
750 hw->aq.asq_last_status) :
751 -EIO;
752 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
753 }
754 break;
755
756 case I40E_NVMUPD_CSUM_LCB:
757 status = i40e_update_nvm_checksum(hw);
758 if (status)
759 *errno = hw->aq.asq_last_status ?
760 i40e_aq_rc_to_posix(status,
761 hw->aq.asq_last_status) :
762 -EIO;
763 else
764 hw->aq.nvm_release_on_done = true;
765 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
766 break;
767
768 default:
769 i40e_debug(hw, I40E_DEBUG_NVM,
770 "NVMUPD: bad cmd %s in writing state.\n",
771 i40e_nvm_update_state_str[upd_cmd]);
772 status = I40E_NOT_SUPPORTED;
773 *errno = -ESRCH;
774 break;
775 }
776
777 /* In some circumstances, a multi-write transaction takes longer
778 * than the default 3 minute timeout on the write semaphore. If
779 * the write failed with an EBUSY status, this is likely the problem,
780 * so here we try to reacquire the semaphore then retry the write.
781 * We only do one retry, then give up.
782 */
783 if (status && (hw->aq.asq_last_status == I40E_AQ_RC_EBUSY) &&
784 !retry_attempt) {
785 i40e_status old_status = status;
786 u32 old_asq_status = hw->aq.asq_last_status;
787 u32 gtime;
788
789 gtime = rd32(hw, I40E_GLVFGEN_TIMER);
790 if (gtime >= hw->nvm.hw_semaphore_timeout) {
791 i40e_debug(hw, I40E_DEBUG_ALL,
792 "NVMUPD: write semaphore expired (%d >= %lld), retrying\n",
793 gtime, hw->nvm.hw_semaphore_timeout);
794 i40e_release_nvm(hw);
795 status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
796 if (status) {
797 i40e_debug(hw, I40E_DEBUG_ALL,
798 "NVMUPD: write semaphore reacquire failed aq_err = %d\n",
799 hw->aq.asq_last_status);
800 status = old_status;
801 hw->aq.asq_last_status = old_asq_status;
802 } else {
803 retry_attempt = true;
804 goto retry;
805 }
806 }
807 }
808
809 return status;
810 }
811
812 /**
813 * i40e_nvmupd_validate_command - Validate given command
814 * @hw: pointer to hardware structure
815 * @cmd: pointer to nvm update command buffer
816 * @errno: pointer to return error code
817 *
818 * Return one of the valid command types or I40E_NVMUPD_INVALID
819 **/
820 static enum i40e_nvmupd_cmd i40e_nvmupd_validate_command(struct i40e_hw *hw,
821 struct i40e_nvm_access *cmd,
822 int *errno)
823 {
824 enum i40e_nvmupd_cmd upd_cmd;
825 u8 transaction, module;
826
827 /* anything that doesn't match a recognized case is an error */
828 upd_cmd = I40E_NVMUPD_INVALID;
829
830 transaction = i40e_nvmupd_get_transaction(cmd->config);
831 module = i40e_nvmupd_get_module(cmd->config);
832
833 /* limits on data size */
834 if ((cmd->data_size < 1) ||
835 (cmd->data_size > I40E_NVMUPD_MAX_DATA)) {
836 i40e_debug(hw, I40E_DEBUG_NVM,
837 "i40e_nvmupd_validate_command data_size %d\n",
838 cmd->data_size);
839 *errno = -EFAULT;
840 return I40E_NVMUPD_INVALID;
841 }
842
843 switch (cmd->command) {
844 case I40E_NVM_READ:
845 switch (transaction) {
846 case I40E_NVM_CON:
847 upd_cmd = I40E_NVMUPD_READ_CON;
848 break;
849 case I40E_NVM_SNT:
850 upd_cmd = I40E_NVMUPD_READ_SNT;
851 break;
852 case I40E_NVM_LCB:
853 upd_cmd = I40E_NVMUPD_READ_LCB;
854 break;
855 case I40E_NVM_SA:
856 upd_cmd = I40E_NVMUPD_READ_SA;
857 break;
858 }
859 break;
860
861 case I40E_NVM_WRITE:
862 switch (transaction) {
863 case I40E_NVM_CON:
864 upd_cmd = I40E_NVMUPD_WRITE_CON;
865 break;
866 case I40E_NVM_SNT:
867 upd_cmd = I40E_NVMUPD_WRITE_SNT;
868 break;
869 case I40E_NVM_LCB:
870 upd_cmd = I40E_NVMUPD_WRITE_LCB;
871 break;
872 case I40E_NVM_SA:
873 upd_cmd = I40E_NVMUPD_WRITE_SA;
874 break;
875 case I40E_NVM_ERA:
876 upd_cmd = I40E_NVMUPD_WRITE_ERA;
877 break;
878 case I40E_NVM_CSUM:
879 upd_cmd = I40E_NVMUPD_CSUM_CON;
880 break;
881 case (I40E_NVM_CSUM|I40E_NVM_SA):
882 upd_cmd = I40E_NVMUPD_CSUM_SA;
883 break;
884 case (I40E_NVM_CSUM|I40E_NVM_LCB):
885 upd_cmd = I40E_NVMUPD_CSUM_LCB;
886 break;
887 }
888 break;
889 }
890 i40e_debug(hw, I40E_DEBUG_NVM, "%s state %d nvm_release_on_hold %d\n",
891 i40e_nvm_update_state_str[upd_cmd],
892 hw->nvmupd_state,
893 hw->aq.nvm_release_on_done);
894
895 if (upd_cmd == I40E_NVMUPD_INVALID) {
896 *errno = -EFAULT;
897 i40e_debug(hw, I40E_DEBUG_NVM,
898 "i40e_nvmupd_validate_command returns %d errno %d\n",
899 upd_cmd, *errno);
900 }
901 return upd_cmd;
902 }
903
904 /**
905 * i40e_nvmupd_nvm_read - Read NVM
906 * @hw: pointer to hardware structure
907 * @cmd: pointer to nvm update command buffer
908 * @bytes: pointer to the data buffer
909 * @errno: pointer to return error code
910 *
911 * cmd structure contains identifiers and data buffer
912 **/
913 static i40e_status i40e_nvmupd_nvm_read(struct i40e_hw *hw,
914 struct i40e_nvm_access *cmd,
915 u8 *bytes, int *errno)
916 {
917 i40e_status status;
918 u8 module, transaction;
919 bool last;
920
921 transaction = i40e_nvmupd_get_transaction(cmd->config);
922 module = i40e_nvmupd_get_module(cmd->config);
923 last = (transaction == I40E_NVM_LCB) || (transaction == I40E_NVM_SA);
924
925 status = i40e_aq_read_nvm(hw, module, cmd->offset, (u16)cmd->data_size,
926 bytes, last, NULL);
927 if (status) {
928 i40e_debug(hw, I40E_DEBUG_NVM,
929 "i40e_nvmupd_nvm_read mod 0x%x off 0x%x len 0x%x\n",
930 module, cmd->offset, cmd->data_size);
931 i40e_debug(hw, I40E_DEBUG_NVM,
932 "i40e_nvmupd_nvm_read status %d aq %d\n",
933 status, hw->aq.asq_last_status);
934 *errno = i40e_aq_rc_to_posix(status, hw->aq.asq_last_status);
935 }
936
937 return status;
938 }
939
940 /**
941 * i40e_nvmupd_nvm_erase - Erase an NVM module
942 * @hw: pointer to hardware structure
943 * @cmd: pointer to nvm update command buffer
944 * @errno: pointer to return error code
945 *
946 * module, offset, data_size and data are in cmd structure
947 **/
948 static i40e_status i40e_nvmupd_nvm_erase(struct i40e_hw *hw,
949 struct i40e_nvm_access *cmd,
950 int *errno)
951 {
952 i40e_status status = 0;
953 u8 module, transaction;
954 bool last;
955
956 transaction = i40e_nvmupd_get_transaction(cmd->config);
957 module = i40e_nvmupd_get_module(cmd->config);
958 last = (transaction & I40E_NVM_LCB);
959 status = i40e_aq_erase_nvm(hw, module, cmd->offset, (u16)cmd->data_size,
960 last, NULL);
961 if (status) {
962 i40e_debug(hw, I40E_DEBUG_NVM,
963 "i40e_nvmupd_nvm_erase mod 0x%x off 0x%x len 0x%x\n",
964 module, cmd->offset, cmd->data_size);
965 i40e_debug(hw, I40E_DEBUG_NVM,
966 "i40e_nvmupd_nvm_erase status %d aq %d\n",
967 status, hw->aq.asq_last_status);
968 *errno = i40e_aq_rc_to_posix(status, hw->aq.asq_last_status);
969 }
970
971 return status;
972 }
973
974 /**
975 * i40e_nvmupd_nvm_write - Write NVM
976 * @hw: pointer to hardware structure
977 * @cmd: pointer to nvm update command buffer
978 * @bytes: pointer to the data buffer
979 * @errno: pointer to return error code
980 *
981 * module, offset, data_size and data are in cmd structure
982 **/
983 static i40e_status i40e_nvmupd_nvm_write(struct i40e_hw *hw,
984 struct i40e_nvm_access *cmd,
985 u8 *bytes, int *errno)
986 {
987 i40e_status status = 0;
988 u8 module, transaction;
989 bool last;
990
991 transaction = i40e_nvmupd_get_transaction(cmd->config);
992 module = i40e_nvmupd_get_module(cmd->config);
993 last = (transaction & I40E_NVM_LCB);
994
995 status = i40e_aq_update_nvm(hw, module, cmd->offset,
996 (u16)cmd->data_size, bytes, last, NULL);
997 if (status) {
998 i40e_debug(hw, I40E_DEBUG_NVM,
999 "i40e_nvmupd_nvm_write mod 0x%x off 0x%x len 0x%x\n",
1000 module, cmd->offset, cmd->data_size);
1001 i40e_debug(hw, I40E_DEBUG_NVM,
1002 "i40e_nvmupd_nvm_write status %d aq %d\n",
1003 status, hw->aq.asq_last_status);
1004 *errno = i40e_aq_rc_to_posix(status, hw->aq.asq_last_status);
1005 }
1006
1007 return status;
1008 }
Linux kernel - Deliverables
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