2 * Copyright 2019 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
24 #include "amdgpu_ras_eeprom.h"
26 #include "amdgpu_ras.h"
27 #include <linux/bits.h>
29 #include "amdgpu_eeprom.h"
30 #include "amdgpu_atomfirmware.h"
31 #include <linux/debugfs.h>
32 #include <linux/uaccess.h>
34 #include "amdgpu_reset.h"
36 /* These are memory addresses as would be seen by one or more EEPROM
37 * chips strung on the I2C bus, usually by manipulating pins 1-3 of a
38 * set of EEPROM devices. They form a continuous memory space.
40 * The I2C device address includes the device type identifier, 1010b,
41 * which is a reserved value and indicates that this is an I2C EEPROM
42 * device. It also includes the top 3 bits of the 19 bit EEPROM memory
43 * address, namely bits 18, 17, and 16. This makes up the 7 bit
44 * address sent on the I2C bus with bit 0 being the direction bit,
45 * which is not represented here, and sent by the hardware directly.
48 * 50h = 1010000b => device type identifier 1010b, bits 18:16 = 000b, address 0.
49 * 54h = 1010100b => --"--, bits 18:16 = 100b, address 40000h.
50 * 56h = 1010110b => --"--, bits 18:16 = 110b, address 60000h.
51 * Depending on the size of the I2C EEPROM device(s), bits 18:16 may
52 * address memory in a device or a device on the I2C bus, depending on
53 * the status of pins 1-3. See top of amdgpu_eeprom.c.
55 * The RAS table lives either at address 0 or address 40000h of EEPROM.
57 #define EEPROM_I2C_MADDR_0 0x0
58 #define EEPROM_I2C_MADDR_4 0x40000
61 * The 2 macros bellow represent the actual size in bytes that
62 * those entities occupy in the EEPROM memory.
63 * RAS_TABLE_RECORD_SIZE is different than sizeof(eeprom_table_record) which
64 * uses uint64 to store 6b fields such as retired_page.
66 #define RAS_TABLE_HEADER_SIZE 20
67 #define RAS_TABLE_RECORD_SIZE 24
69 /* Table hdr is 'AMDR' */
70 #define RAS_TABLE_HDR_VAL 0x414d4452
72 /* Bad GPU tag ‘BADG’ */
73 #define RAS_TABLE_HDR_BAD 0x42414447
76 * EEPROM Table structure v1
77 * ---------------------------------
79 * | EEPROM TABLE HEADER |
80 * | ( size 20 Bytes ) |
82 * ---------------------------------
84 * | BAD PAGE RECORD AREA |
86 * ---------------------------------
89 /* Assume 2-Mbit size EEPROM and take up the whole space. */
90 #define RAS_TBL_SIZE_BYTES (256 * 1024)
91 #define RAS_TABLE_START 0
92 #define RAS_HDR_START RAS_TABLE_START
93 #define RAS_RECORD_START (RAS_HDR_START + RAS_TABLE_HEADER_SIZE)
94 #define RAS_MAX_RECORD_COUNT ((RAS_TBL_SIZE_BYTES - RAS_TABLE_HEADER_SIZE) \
95 / RAS_TABLE_RECORD_SIZE)
98 * EEPROM Table structrue v2.1
99 * ---------------------------------
101 * | EEPROM TABLE HEADER |
102 * | ( size 20 Bytes ) |
104 * ---------------------------------
106 * | EEPROM TABLE RAS INFO |
107 * | (available info size 4 Bytes) |
108 * | ( reserved size 252 Bytes ) |
110 * ---------------------------------
112 * | BAD PAGE RECORD AREA |
114 * ---------------------------------
117 /* EEPROM Table V2_1 */
118 #define RAS_TABLE_V2_1_INFO_SIZE 256
119 #define RAS_TABLE_V2_1_INFO_START RAS_TABLE_HEADER_SIZE
120 #define RAS_RECORD_START_V2_1 (RAS_HDR_START + RAS_TABLE_HEADER_SIZE + \
121 RAS_TABLE_V2_1_INFO_SIZE)
122 #define RAS_MAX_RECORD_COUNT_V2_1 ((RAS_TBL_SIZE_BYTES - RAS_TABLE_HEADER_SIZE - \
123 RAS_TABLE_V2_1_INFO_SIZE) \
124 / RAS_TABLE_RECORD_SIZE)
126 /* Given a zero-based index of an EEPROM RAS record, yields the EEPROM
127 * offset off of RAS_TABLE_START. That is, this is something you can
128 * add to control->i2c_address, and then tell I2C layer to read
129 * from/write to there. _N is the so called absolute index,
130 * because it starts right after the table header.
132 #define RAS_INDEX_TO_OFFSET(_C, _N) ((_C)->ras_record_offset + \
133 (_N) * RAS_TABLE_RECORD_SIZE)
135 #define RAS_OFFSET_TO_INDEX(_C, _O) (((_O) - \
136 (_C)->ras_record_offset) / RAS_TABLE_RECORD_SIZE)
138 /* Given a 0-based relative record index, 0, 1, 2, ..., etc., off
139 * of "fri", return the absolute record index off of the end of
142 #define RAS_RI_TO_AI(_C, _I) (((_I) + (_C)->ras_fri) % \
143 (_C)->ras_max_record_count)
145 #define RAS_NUM_RECS(_tbl_hdr) (((_tbl_hdr)->tbl_size - \
146 RAS_TABLE_HEADER_SIZE) / RAS_TABLE_RECORD_SIZE)
148 #define RAS_NUM_RECS_V2_1(_tbl_hdr) (((_tbl_hdr)->tbl_size - \
149 RAS_TABLE_HEADER_SIZE - \
150 RAS_TABLE_V2_1_INFO_SIZE) / RAS_TABLE_RECORD_SIZE)
152 #define to_amdgpu_device(x) ((container_of(x, struct amdgpu_ras, eeprom_control))->adev)
154 static bool __is_ras_eeprom_supported(struct amdgpu_device *adev)
156 switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
157 case IP_VERSION(11, 0, 2): /* VEGA20 and ARCTURUS */
158 case IP_VERSION(11, 0, 7): /* Sienna cichlid */
159 case IP_VERSION(13, 0, 0):
160 case IP_VERSION(13, 0, 2): /* Aldebaran */
161 case IP_VERSION(13, 0, 10):
163 case IP_VERSION(13, 0, 6):
164 return (adev->gmc.is_app_apu) ? false : true;
170 static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev,
171 struct amdgpu_ras_eeprom_control *control)
173 struct atom_context *atom_ctx = adev->mode_info.atom_context;
179 if (amdgpu_atomfirmware_ras_rom_addr(adev, &i2c_addr)) {
180 /* The address given by VBIOS is an 8-bit, wire-format
181 * address, i.e. the most significant byte.
183 * Normalize it to a 19-bit EEPROM address. Remove the
184 * device type identifier and make it a 7-bit address;
185 * then make it a 19-bit EEPROM address. See top of
188 i2c_addr = (i2c_addr & 0x0F) >> 1;
189 control->i2c_address = ((u32) i2c_addr) << 16;
194 switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
195 case IP_VERSION(11, 0, 2):
196 /* VEGA20 and ARCTURUS */
197 if (adev->asic_type == CHIP_VEGA20)
198 control->i2c_address = EEPROM_I2C_MADDR_0;
199 else if (strnstr(atom_ctx->vbios_pn,
201 sizeof(atom_ctx->vbios_pn)))
202 control->i2c_address = EEPROM_I2C_MADDR_0;
204 control->i2c_address = EEPROM_I2C_MADDR_4;
206 case IP_VERSION(11, 0, 7):
207 control->i2c_address = EEPROM_I2C_MADDR_0;
209 case IP_VERSION(13, 0, 2):
210 if (strnstr(atom_ctx->vbios_pn, "D673",
211 sizeof(atom_ctx->vbios_pn)))
212 control->i2c_address = EEPROM_I2C_MADDR_4;
214 control->i2c_address = EEPROM_I2C_MADDR_0;
216 case IP_VERSION(13, 0, 0):
217 case IP_VERSION(13, 0, 6):
218 case IP_VERSION(13, 0, 10):
219 control->i2c_address = EEPROM_I2C_MADDR_4;
227 __encode_table_header_to_buf(struct amdgpu_ras_eeprom_table_header *hdr,
230 u32 *pp = (uint32_t *)buf;
232 pp[0] = cpu_to_le32(hdr->header);
233 pp[1] = cpu_to_le32(hdr->version);
234 pp[2] = cpu_to_le32(hdr->first_rec_offset);
235 pp[3] = cpu_to_le32(hdr->tbl_size);
236 pp[4] = cpu_to_le32(hdr->checksum);
240 __decode_table_header_from_buf(struct amdgpu_ras_eeprom_table_header *hdr,
243 u32 *pp = (uint32_t *)buf;
245 hdr->header = le32_to_cpu(pp[0]);
246 hdr->version = le32_to_cpu(pp[1]);
247 hdr->first_rec_offset = le32_to_cpu(pp[2]);
248 hdr->tbl_size = le32_to_cpu(pp[3]);
249 hdr->checksum = le32_to_cpu(pp[4]);
252 static int __write_table_header(struct amdgpu_ras_eeprom_control *control)
254 u8 buf[RAS_TABLE_HEADER_SIZE];
255 struct amdgpu_device *adev = to_amdgpu_device(control);
258 memset(buf, 0, sizeof(buf));
259 __encode_table_header_to_buf(&control->tbl_hdr, buf);
261 /* i2c may be unstable in gpu reset */
262 down_read(&adev->reset_domain->sem);
263 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
264 control->i2c_address +
265 control->ras_header_offset,
266 buf, RAS_TABLE_HEADER_SIZE);
267 up_read(&adev->reset_domain->sem);
270 DRM_ERROR("Failed to write EEPROM table header:%d", res);
271 } else if (res < RAS_TABLE_HEADER_SIZE) {
272 DRM_ERROR("Short write:%d out of %d\n",
273 res, RAS_TABLE_HEADER_SIZE);
283 __encode_table_ras_info_to_buf(struct amdgpu_ras_eeprom_table_ras_info *rai,
286 u32 *pp = (uint32_t *)buf;
289 tmp = ((uint32_t)(rai->rma_status) & 0xFF) |
290 (((uint32_t)(rai->health_percent) << 8) & 0xFF00) |
291 (((uint32_t)(rai->ecc_page_threshold) << 16) & 0xFFFF0000);
292 pp[0] = cpu_to_le32(tmp);
296 __decode_table_ras_info_from_buf(struct amdgpu_ras_eeprom_table_ras_info *rai,
299 u32 *pp = (uint32_t *)buf;
302 tmp = le32_to_cpu(pp[0]);
303 rai->rma_status = tmp & 0xFF;
304 rai->health_percent = (tmp >> 8) & 0xFF;
305 rai->ecc_page_threshold = (tmp >> 16) & 0xFFFF;
308 static int __write_table_ras_info(struct amdgpu_ras_eeprom_control *control)
310 struct amdgpu_device *adev = to_amdgpu_device(control);
314 buf = kzalloc(RAS_TABLE_V2_1_INFO_SIZE, GFP_KERNEL);
316 DRM_ERROR("Failed to alloc buf to write table ras info\n");
320 __encode_table_ras_info_to_buf(&control->tbl_rai, buf);
322 /* i2c may be unstable in gpu reset */
323 down_read(&adev->reset_domain->sem);
324 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
325 control->i2c_address +
326 control->ras_info_offset,
327 buf, RAS_TABLE_V2_1_INFO_SIZE);
328 up_read(&adev->reset_domain->sem);
331 DRM_ERROR("Failed to write EEPROM table ras info:%d", res);
332 } else if (res < RAS_TABLE_V2_1_INFO_SIZE) {
333 DRM_ERROR("Short write:%d out of %d\n",
334 res, RAS_TABLE_V2_1_INFO_SIZE);
345 static u8 __calc_hdr_byte_sum(const struct amdgpu_ras_eeprom_control *control)
351 /* Header checksum, skip checksum field in the calculation */
352 sz = sizeof(control->tbl_hdr) - sizeof(control->tbl_hdr.checksum);
353 pp = (u8 *) &control->tbl_hdr;
355 for (ii = 0; ii < sz; ii++, pp++)
361 static u8 __calc_ras_info_byte_sum(const struct amdgpu_ras_eeprom_control *control)
367 sz = sizeof(control->tbl_rai);
368 pp = (u8 *) &control->tbl_rai;
370 for (ii = 0; ii < sz; ii++, pp++)
376 static int amdgpu_ras_eeprom_correct_header_tag(
377 struct amdgpu_ras_eeprom_control *control,
380 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
385 csum = -hdr->checksum;
387 hh = (void *) &hdr->header;
388 csum -= (hh[0] + hh[1] + hh[2] + hh[3]);
389 hh = (void *) &header;
390 csum += hh[0] + hh[1] + hh[2] + hh[3];
392 mutex_lock(&control->ras_tbl_mutex);
393 hdr->header = header;
394 hdr->checksum = csum;
395 res = __write_table_header(control);
396 mutex_unlock(&control->ras_tbl_mutex);
402 * amdgpu_ras_eeprom_reset_table -- Reset the RAS EEPROM table
403 * @control: pointer to control structure
405 * Reset the contents of the header of the RAS EEPROM table.
406 * Return 0 on success, -errno on error.
408 int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control)
410 struct amdgpu_device *adev = to_amdgpu_device(control);
411 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
412 struct amdgpu_ras_eeprom_table_ras_info *rai = &control->tbl_rai;
413 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
417 mutex_lock(&control->ras_tbl_mutex);
419 hdr->header = RAS_TABLE_HDR_VAL;
421 adev->umc.ras->set_eeprom_table_version)
422 adev->umc.ras->set_eeprom_table_version(hdr);
424 hdr->version = RAS_TABLE_VER_V1;
426 if (hdr->version == RAS_TABLE_VER_V2_1) {
427 hdr->first_rec_offset = RAS_RECORD_START_V2_1;
428 hdr->tbl_size = RAS_TABLE_HEADER_SIZE +
429 RAS_TABLE_V2_1_INFO_SIZE;
430 rai->rma_status = GPU_HEALTH_USABLE;
432 * GPU health represented as a percentage.
433 * 0 means worst health, 100 means fully health.
435 rai->health_percent = 100;
436 /* ecc_page_threshold = 0 means disable bad page retirement */
437 rai->ecc_page_threshold = con->bad_page_cnt_threshold;
439 hdr->first_rec_offset = RAS_RECORD_START;
440 hdr->tbl_size = RAS_TABLE_HEADER_SIZE;
443 csum = __calc_hdr_byte_sum(control);
444 if (hdr->version == RAS_TABLE_VER_V2_1)
445 csum += __calc_ras_info_byte_sum(control);
447 hdr->checksum = csum;
448 res = __write_table_header(control);
449 if (!res && hdr->version > RAS_TABLE_VER_V1)
450 res = __write_table_ras_info(control);
452 control->ras_num_recs = 0;
453 control->ras_fri = 0;
455 amdgpu_dpm_send_hbm_bad_pages_num(adev, control->ras_num_recs);
457 control->bad_channel_bitmap = 0;
458 amdgpu_dpm_send_hbm_bad_channel_flag(adev, control->bad_channel_bitmap);
459 con->update_channel_flag = false;
461 amdgpu_ras_debugfs_set_ret_size(control);
463 mutex_unlock(&control->ras_tbl_mutex);
469 __encode_table_record_to_buf(struct amdgpu_ras_eeprom_control *control,
470 struct eeprom_table_record *record,
476 /* Next are all record fields according to EEPROM page spec in LE foramt */
477 buf[i++] = record->err_type;
479 buf[i++] = record->bank;
481 tmp = cpu_to_le64(record->ts);
482 memcpy(buf + i, &tmp, 8);
485 tmp = cpu_to_le64((record->offset & 0xffffffffffff));
486 memcpy(buf + i, &tmp, 6);
489 buf[i++] = record->mem_channel;
490 buf[i++] = record->mcumc_id;
492 tmp = cpu_to_le64((record->retired_page & 0xffffffffffff));
493 memcpy(buf + i, &tmp, 6);
497 __decode_table_record_from_buf(struct amdgpu_ras_eeprom_control *control,
498 struct eeprom_table_record *record,
504 /* Next are all record fields according to EEPROM page spec in LE foramt */
505 record->err_type = buf[i++];
507 record->bank = buf[i++];
509 memcpy(&tmp, buf + i, 8);
510 record->ts = le64_to_cpu(tmp);
513 memcpy(&tmp, buf + i, 6);
514 record->offset = (le64_to_cpu(tmp) & 0xffffffffffff);
517 record->mem_channel = buf[i++];
518 record->mcumc_id = buf[i++];
520 memcpy(&tmp, buf + i, 6);
521 record->retired_page = (le64_to_cpu(tmp) & 0xffffffffffff);
524 bool amdgpu_ras_eeprom_check_err_threshold(struct amdgpu_device *adev)
526 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
528 if (!__is_ras_eeprom_supported(adev) ||
529 !amdgpu_bad_page_threshold)
532 /* skip check eeprom table for VEGA20 Gaming */
536 if (!(con->features & BIT(AMDGPU_RAS_BLOCK__UMC)))
539 if (con->eeprom_control.tbl_hdr.header == RAS_TABLE_HDR_BAD) {
540 if (amdgpu_bad_page_threshold == -1) {
541 dev_warn(adev->dev, "RAS records:%d exceed threshold:%d",
542 con->eeprom_control.ras_num_recs, con->bad_page_cnt_threshold);
544 "But GPU can be operated due to bad_page_threshold = -1.\n");
547 dev_warn(adev->dev, "This GPU is in BAD status.");
548 dev_warn(adev->dev, "Please retire it or set a larger "
549 "threshold value when reloading driver.\n");
558 * __amdgpu_ras_eeprom_write -- write indexed from buffer to EEPROM
559 * @control: pointer to control structure
560 * @buf: pointer to buffer containing data to write
561 * @fri: start writing at this index
562 * @num: number of records to write
564 * The caller must hold the table mutex in @control.
565 * Return 0 on success, -errno otherwise.
567 static int __amdgpu_ras_eeprom_write(struct amdgpu_ras_eeprom_control *control,
568 u8 *buf, const u32 fri, const u32 num)
570 struct amdgpu_device *adev = to_amdgpu_device(control);
574 /* i2c may be unstable in gpu reset */
575 down_read(&adev->reset_domain->sem);
576 buf_size = num * RAS_TABLE_RECORD_SIZE;
577 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
578 control->i2c_address +
579 RAS_INDEX_TO_OFFSET(control, fri),
581 up_read(&adev->reset_domain->sem);
583 DRM_ERROR("Writing %d EEPROM table records error:%d",
585 } else if (res < buf_size) {
586 /* Short write, return error.
588 DRM_ERROR("Wrote %d records out of %d",
589 res / RAS_TABLE_RECORD_SIZE, num);
599 amdgpu_ras_eeprom_append_table(struct amdgpu_ras_eeprom_control *control,
600 struct eeprom_table_record *record,
603 struct amdgpu_ras *con = amdgpu_ras_get_context(to_amdgpu_device(control));
608 buf = kcalloc(num, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
612 /* Encode all of them in one go.
615 for (i = 0; i < num; i++, pp += RAS_TABLE_RECORD_SIZE) {
616 __encode_table_record_to_buf(control, &record[i], pp);
618 /* update bad channel bitmap */
619 if ((record[i].mem_channel < BITS_PER_TYPE(control->bad_channel_bitmap)) &&
620 !(control->bad_channel_bitmap & (1 << record[i].mem_channel))) {
621 control->bad_channel_bitmap |= 1 << record[i].mem_channel;
622 con->update_channel_flag = true;
626 /* a, first record index to write into.
627 * b, last record index to write into.
628 * a = first index to read (fri) + number of records in the table,
630 * Let N = control->ras_max_num_record_count, then we have,
631 * case 0: 0 <= a <= b < N,
632 * just append @num records starting at a;
633 * case 1: 0 <= a < N <= b,
634 * append (N - a) records starting at a, and
635 * append the remainder, b % N + 1, starting at 0.
636 * case 2: 0 <= fri < N <= a <= b, then modulo N we get two subcases,
637 * case 2a: 0 <= a <= b < N
638 * append num records starting at a; and fix fri if b overwrote it,
639 * and since a <= b, if b overwrote it then a must've also,
640 * and if b didn't overwrite it, then a didn't also.
641 * case 2b: 0 <= b < a < N
642 * write num records starting at a, which wraps around 0=N
643 * and overwrite fri unconditionally. Now from case 2a,
644 * this means that b eclipsed fri to overwrite it and wrap
645 * around 0 again, i.e. b = 2N+r pre modulo N, so we unconditionally
646 * set fri = b + 1 (mod N).
647 * Now, since fri is updated in every case, except the trivial case 0,
648 * the number of records present in the table after writing, is,
649 * num_recs - 1 = b - fri (mod N), and we take the positive value,
650 * by adding an arbitrary multiple of N before taking the modulo N
653 a = control->ras_fri + control->ras_num_recs;
655 if (b < control->ras_max_record_count) {
656 res = __amdgpu_ras_eeprom_write(control, buf, a, num);
657 } else if (a < control->ras_max_record_count) {
660 g0 = control->ras_max_record_count - a;
661 g1 = b % control->ras_max_record_count + 1;
662 res = __amdgpu_ras_eeprom_write(control, buf, a, g0);
665 res = __amdgpu_ras_eeprom_write(control,
666 buf + g0 * RAS_TABLE_RECORD_SIZE,
670 if (g1 > control->ras_fri)
671 control->ras_fri = g1 % control->ras_max_record_count;
673 a %= control->ras_max_record_count;
674 b %= control->ras_max_record_count;
677 /* Note that, b - a + 1 = num. */
678 res = __amdgpu_ras_eeprom_write(control, buf, a, num);
681 if (b >= control->ras_fri)
682 control->ras_fri = (b + 1) % control->ras_max_record_count;
686 /* b < a, which means, we write from
687 * a to the end of the table, and from
688 * the start of the table to b.
690 g0 = control->ras_max_record_count - a;
692 res = __amdgpu_ras_eeprom_write(control, buf, a, g0);
695 res = __amdgpu_ras_eeprom_write(control,
696 buf + g0 * RAS_TABLE_RECORD_SIZE,
700 control->ras_fri = g1 % control->ras_max_record_count;
703 control->ras_num_recs = 1 + (control->ras_max_record_count + b
705 % control->ras_max_record_count;
712 amdgpu_ras_eeprom_update_header(struct amdgpu_ras_eeprom_control *control)
714 struct amdgpu_device *adev = to_amdgpu_device(control);
715 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
720 /* Modify the header if it exceeds.
722 if (amdgpu_bad_page_threshold != 0 &&
723 control->ras_num_recs >= ras->bad_page_cnt_threshold) {
725 "Saved bad pages %d reaches threshold value %d\n",
726 control->ras_num_recs, ras->bad_page_cnt_threshold);
727 control->tbl_hdr.header = RAS_TABLE_HDR_BAD;
728 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1) {
729 control->tbl_rai.rma_status = GPU_RETIRED__ECC_REACH_THRESHOLD;
730 control->tbl_rai.health_percent = 0;
734 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
735 control->tbl_hdr.tbl_size = RAS_TABLE_HEADER_SIZE +
736 RAS_TABLE_V2_1_INFO_SIZE +
737 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
739 control->tbl_hdr.tbl_size = RAS_TABLE_HEADER_SIZE +
740 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
741 control->tbl_hdr.checksum = 0;
743 buf_size = control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
744 buf = kcalloc(control->ras_num_recs, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
746 DRM_ERROR("allocating memory for table of size %d bytes failed\n",
747 control->tbl_hdr.tbl_size);
752 down_read(&adev->reset_domain->sem);
753 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
754 control->i2c_address +
755 control->ras_record_offset,
757 up_read(&adev->reset_domain->sem);
759 DRM_ERROR("EEPROM failed reading records:%d\n",
762 } else if (res < buf_size) {
763 DRM_ERROR("EEPROM read %d out of %d bytes\n",
770 * bad page records have been stored in eeprom,
771 * now calculate gpu health percent
773 if (amdgpu_bad_page_threshold != 0 &&
774 control->tbl_hdr.version == RAS_TABLE_VER_V2_1 &&
775 control->ras_num_recs < ras->bad_page_cnt_threshold)
776 control->tbl_rai.health_percent = ((ras->bad_page_cnt_threshold -
777 control->ras_num_recs) * 100) /
778 ras->bad_page_cnt_threshold;
780 /* Recalc the checksum.
783 for (pp = buf; pp < buf + buf_size; pp++)
786 csum += __calc_hdr_byte_sum(control);
787 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
788 csum += __calc_ras_info_byte_sum(control);
789 /* avoid sign extension when assigning to "checksum" */
791 control->tbl_hdr.checksum = csum;
792 res = __write_table_header(control);
793 if (!res && control->tbl_hdr.version > RAS_TABLE_VER_V1)
794 res = __write_table_ras_info(control);
801 * amdgpu_ras_eeprom_append -- append records to the EEPROM RAS table
802 * @control: pointer to control structure
803 * @record: array of records to append
804 * @num: number of records in @record array
806 * Append @num records to the table, calculate the checksum and write
807 * the table back to EEPROM. The maximum number of records that
808 * can be appended is between 1 and control->ras_max_record_count,
809 * regardless of how many records are already stored in the table.
811 * Return 0 on success or if EEPROM is not supported, -errno on error.
813 int amdgpu_ras_eeprom_append(struct amdgpu_ras_eeprom_control *control,
814 struct eeprom_table_record *record,
817 struct amdgpu_device *adev = to_amdgpu_device(control);
820 if (!__is_ras_eeprom_supported(adev))
824 DRM_ERROR("will not append 0 records\n");
826 } else if (num > control->ras_max_record_count) {
827 DRM_ERROR("cannot append %d records than the size of table %d\n",
828 num, control->ras_max_record_count);
832 mutex_lock(&control->ras_tbl_mutex);
834 res = amdgpu_ras_eeprom_append_table(control, record, num);
836 res = amdgpu_ras_eeprom_update_header(control);
838 amdgpu_ras_debugfs_set_ret_size(control);
840 mutex_unlock(&control->ras_tbl_mutex);
845 * __amdgpu_ras_eeprom_read -- read indexed from EEPROM into buffer
846 * @control: pointer to control structure
847 * @buf: pointer to buffer to read into
848 * @fri: first record index, start reading at this index, absolute index
849 * @num: number of records to read
851 * The caller must hold the table mutex in @control.
852 * Return 0 on success, -errno otherwise.
854 static int __amdgpu_ras_eeprom_read(struct amdgpu_ras_eeprom_control *control,
855 u8 *buf, const u32 fri, const u32 num)
857 struct amdgpu_device *adev = to_amdgpu_device(control);
861 /* i2c may be unstable in gpu reset */
862 down_read(&adev->reset_domain->sem);
863 buf_size = num * RAS_TABLE_RECORD_SIZE;
864 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
865 control->i2c_address +
866 RAS_INDEX_TO_OFFSET(control, fri),
868 up_read(&adev->reset_domain->sem);
870 DRM_ERROR("Reading %d EEPROM table records error:%d",
872 } else if (res < buf_size) {
873 /* Short read, return error.
875 DRM_ERROR("Read %d records out of %d",
876 res / RAS_TABLE_RECORD_SIZE, num);
886 * amdgpu_ras_eeprom_read -- read EEPROM
887 * @control: pointer to control structure
888 * @record: array of records to read into
889 * @num: number of records in @record
891 * Reads num records from the RAS table in EEPROM and
892 * writes the data into @record array.
894 * Returns 0 on success, -errno on error.
896 int amdgpu_ras_eeprom_read(struct amdgpu_ras_eeprom_control *control,
897 struct eeprom_table_record *record,
900 struct amdgpu_device *adev = to_amdgpu_device(control);
901 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
906 if (!__is_ras_eeprom_supported(adev))
910 DRM_ERROR("will not read 0 records\n");
912 } else if (num > control->ras_num_recs) {
913 DRM_ERROR("too many records to read:%d available:%d\n",
914 num, control->ras_num_recs);
918 buf = kcalloc(num, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
922 /* Determine how many records to read, from the first record
923 * index, fri, to the end of the table, and from the beginning
924 * of the table, such that the total number of records is
925 * @num, and we handle wrap around when fri > 0 and
926 * fri + num > RAS_MAX_RECORD_COUNT.
928 * First we compute the index of the last element
929 * which would be fetched from each region,
930 * g0 is in [fri, fri + num - 1], and
931 * g1 is in [0, RAS_MAX_RECORD_COUNT - 1].
932 * Then, if g0 < RAS_MAX_RECORD_COUNT, the index of
933 * the last element to fetch, we set g0 to _the number_
934 * of elements to fetch, @num, since we know that the last
935 * indexed to be fetched does not exceed the table.
937 * If, however, g0 >= RAS_MAX_RECORD_COUNT, then
938 * we set g0 to the number of elements to read
939 * until the end of the table, and g1 to the number of
940 * elements to read from the beginning of the table.
942 g0 = control->ras_fri + num - 1;
943 g1 = g0 % control->ras_max_record_count;
944 if (g0 < control->ras_max_record_count) {
948 g0 = control->ras_max_record_count - control->ras_fri;
952 mutex_lock(&control->ras_tbl_mutex);
953 res = __amdgpu_ras_eeprom_read(control, buf, control->ras_fri, g0);
957 res = __amdgpu_ras_eeprom_read(control,
958 buf + g0 * RAS_TABLE_RECORD_SIZE,
966 /* Read up everything? Then transform.
969 for (i = 0; i < num; i++, pp += RAS_TABLE_RECORD_SIZE) {
970 __decode_table_record_from_buf(control, &record[i], pp);
972 /* update bad channel bitmap */
973 if ((record[i].mem_channel < BITS_PER_TYPE(control->bad_channel_bitmap)) &&
974 !(control->bad_channel_bitmap & (1 << record[i].mem_channel))) {
975 control->bad_channel_bitmap |= 1 << record[i].mem_channel;
976 con->update_channel_flag = true;
981 mutex_unlock(&control->ras_tbl_mutex);
986 uint32_t amdgpu_ras_eeprom_max_record_count(struct amdgpu_ras_eeprom_control *control)
988 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
989 return RAS_MAX_RECORD_COUNT_V2_1;
991 return RAS_MAX_RECORD_COUNT;
995 amdgpu_ras_debugfs_eeprom_size_read(struct file *f, char __user *buf,
996 size_t size, loff_t *pos)
998 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
999 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1000 struct amdgpu_ras_eeprom_control *control = ras ? &ras->eeprom_control : NULL;
1007 if (!ras || !control) {
1008 res = snprintf(data, sizeof(data), "Not supported\n");
1010 res = snprintf(data, sizeof(data), "%d bytes or %d records\n",
1011 RAS_TBL_SIZE_BYTES, control->ras_max_record_count);
1018 res = min_t(size_t, res, size);
1020 if (copy_to_user(buf, &data[*pos], res))
1028 const struct file_operations amdgpu_ras_debugfs_eeprom_size_ops = {
1029 .owner = THIS_MODULE,
1030 .read = amdgpu_ras_debugfs_eeprom_size_read,
1032 .llseek = default_llseek,
1035 static const char *tbl_hdr_str = " Signature Version FirstOffs Size Checksum\n";
1036 static const char *tbl_hdr_fmt = "0x%08X 0x%08X 0x%08X 0x%08X 0x%08X\n";
1037 #define tbl_hdr_fmt_size (5 * (2+8) + 4 + 1)
1038 static const char *rec_hdr_str = "Index Offset ErrType Bank/CU TimeStamp Offs/Addr MemChl MCUMCID RetiredPage\n";
1039 static const char *rec_hdr_fmt = "%5d 0x%05X %7s 0x%02X 0x%016llX 0x%012llX 0x%02X 0x%02X 0x%012llX\n";
1040 #define rec_hdr_fmt_size (5 + 1 + 7 + 1 + 7 + 1 + 7 + 1 + 18 + 1 + 14 + 1 + 6 + 1 + 7 + 1 + 14 + 1)
1042 static const char *record_err_type_str[AMDGPU_RAS_EEPROM_ERR_COUNT] = {
1048 static loff_t amdgpu_ras_debugfs_table_size(struct amdgpu_ras_eeprom_control *control)
1050 return strlen(tbl_hdr_str) + tbl_hdr_fmt_size +
1051 strlen(rec_hdr_str) + rec_hdr_fmt_size * control->ras_num_recs;
1054 void amdgpu_ras_debugfs_set_ret_size(struct amdgpu_ras_eeprom_control *control)
1056 struct amdgpu_ras *ras = container_of(control, struct amdgpu_ras,
1058 struct dentry *de = ras->de_ras_eeprom_table;
1061 d_inode(de)->i_size = amdgpu_ras_debugfs_table_size(control);
1064 static ssize_t amdgpu_ras_debugfs_table_read(struct file *f, char __user *buf,
1065 size_t size, loff_t *pos)
1067 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1068 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1069 struct amdgpu_ras_eeprom_control *control = &ras->eeprom_control;
1070 const size_t orig_size = size;
1074 mutex_lock(&control->ras_tbl_mutex);
1076 /* We want *pos - data_len > 0, which means there's
1077 * bytes to be printed from data.
1079 data_len = strlen(tbl_hdr_str);
1080 if (*pos < data_len) {
1082 data_len = min_t(size_t, data_len, size);
1083 if (copy_to_user(buf, &tbl_hdr_str[*pos], data_len))
1090 data_len = strlen(tbl_hdr_str) + tbl_hdr_fmt_size;
1091 if (*pos < data_len && size > 0) {
1092 u8 data[tbl_hdr_fmt_size + 1];
1095 snprintf(data, sizeof(data), tbl_hdr_fmt,
1096 control->tbl_hdr.header,
1097 control->tbl_hdr.version,
1098 control->tbl_hdr.first_rec_offset,
1099 control->tbl_hdr.tbl_size,
1100 control->tbl_hdr.checksum);
1103 data_len = min_t(size_t, data_len, size);
1104 lpos = *pos - strlen(tbl_hdr_str);
1105 if (copy_to_user(buf, &data[lpos], data_len))
1112 data_len = strlen(tbl_hdr_str) + tbl_hdr_fmt_size + strlen(rec_hdr_str);
1113 if (*pos < data_len && size > 0) {
1117 data_len = min_t(size_t, data_len, size);
1118 lpos = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size;
1119 if (copy_to_user(buf, &rec_hdr_str[lpos], data_len))
1126 data_len = amdgpu_ras_debugfs_table_size(control);
1127 if (*pos < data_len && size > 0) {
1128 u8 dare[RAS_TABLE_RECORD_SIZE];
1129 u8 data[rec_hdr_fmt_size + 1];
1130 struct eeprom_table_record record;
1133 /* Find the starting record index
1135 s = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size -
1136 strlen(rec_hdr_str);
1137 s = s / rec_hdr_fmt_size;
1138 r = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size -
1139 strlen(rec_hdr_str);
1140 r = r % rec_hdr_fmt_size;
1142 for ( ; size > 0 && s < control->ras_num_recs; s++) {
1143 u32 ai = RAS_RI_TO_AI(control, s);
1144 /* Read a single record
1146 res = __amdgpu_ras_eeprom_read(control, dare, ai, 1);
1149 __decode_table_record_from_buf(control, &record, dare);
1150 snprintf(data, sizeof(data), rec_hdr_fmt,
1152 RAS_INDEX_TO_OFFSET(control, ai),
1153 record_err_type_str[record.err_type],
1159 record.retired_page);
1161 data_len = min_t(size_t, rec_hdr_fmt_size - r, size);
1162 if (copy_to_user(buf, &data[r], data_len)) {
1174 mutex_unlock(&control->ras_tbl_mutex);
1175 return res < 0 ? res : orig_size - size;
1179 amdgpu_ras_debugfs_eeprom_table_read(struct file *f, char __user *buf,
1180 size_t size, loff_t *pos)
1182 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1183 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1184 struct amdgpu_ras_eeprom_control *control = ras ? &ras->eeprom_control : NULL;
1191 if (!ras || !control) {
1192 res = snprintf(data, sizeof(data), "Not supported\n");
1197 res = min_t(size_t, res, size);
1199 if (copy_to_user(buf, &data[*pos], res))
1206 return amdgpu_ras_debugfs_table_read(f, buf, size, pos);
1210 const struct file_operations amdgpu_ras_debugfs_eeprom_table_ops = {
1211 .owner = THIS_MODULE,
1212 .read = amdgpu_ras_debugfs_eeprom_table_read,
1214 .llseek = default_llseek,
1218 * __verify_ras_table_checksum -- verify the RAS EEPROM table checksum
1219 * @control: pointer to control structure
1221 * Check the checksum of the stored in EEPROM RAS table.
1223 * Return 0 if the checksum is correct,
1224 * positive if it is not correct, and
1225 * -errno on I/O error.
1227 static int __verify_ras_table_checksum(struct amdgpu_ras_eeprom_control *control)
1229 struct amdgpu_device *adev = to_amdgpu_device(control);
1233 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
1234 buf_size = RAS_TABLE_HEADER_SIZE +
1235 RAS_TABLE_V2_1_INFO_SIZE +
1236 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
1238 buf_size = RAS_TABLE_HEADER_SIZE +
1239 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
1241 buf = kzalloc(buf_size, GFP_KERNEL);
1243 DRM_ERROR("Out of memory checking RAS table checksum.\n");
1247 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1248 control->i2c_address +
1249 control->ras_header_offset,
1251 if (res < buf_size) {
1252 DRM_ERROR("Partial read for checksum, res:%d\n", res);
1253 /* On partial reads, return -EIO.
1261 for (pp = buf; pp < buf + buf_size; pp++)
1265 return res < 0 ? res : csum;
1268 static int __read_table_ras_info(struct amdgpu_ras_eeprom_control *control)
1270 struct amdgpu_ras_eeprom_table_ras_info *rai = &control->tbl_rai;
1271 struct amdgpu_device *adev = to_amdgpu_device(control);
1275 buf = kzalloc(RAS_TABLE_V2_1_INFO_SIZE, GFP_KERNEL);
1277 DRM_ERROR("Failed to alloc buf to read EEPROM table ras info\n");
1282 * EEPROM table V2_1 supports ras info,
1283 * read EEPROM table ras info
1285 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1286 control->i2c_address + control->ras_info_offset,
1287 buf, RAS_TABLE_V2_1_INFO_SIZE);
1288 if (res < RAS_TABLE_V2_1_INFO_SIZE) {
1289 DRM_ERROR("Failed to read EEPROM table ras info, res:%d", res);
1290 res = res >= 0 ? -EIO : res;
1294 __decode_table_ras_info_from_buf(rai, buf);
1298 return res == RAS_TABLE_V2_1_INFO_SIZE ? 0 : res;
1301 int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control,
1302 bool *exceed_err_limit)
1304 struct amdgpu_device *adev = to_amdgpu_device(control);
1305 unsigned char buf[RAS_TABLE_HEADER_SIZE] = { 0 };
1306 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
1307 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1310 *exceed_err_limit = false;
1312 if (!__is_ras_eeprom_supported(adev))
1315 /* Verify i2c adapter is initialized */
1316 if (!adev->pm.ras_eeprom_i2c_bus || !adev->pm.ras_eeprom_i2c_bus->algo)
1319 if (!__get_eeprom_i2c_addr(adev, control))
1322 control->ras_header_offset = RAS_HDR_START;
1323 control->ras_info_offset = RAS_TABLE_V2_1_INFO_START;
1324 mutex_init(&control->ras_tbl_mutex);
1326 /* Read the table header from EEPROM address */
1327 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1328 control->i2c_address + control->ras_header_offset,
1329 buf, RAS_TABLE_HEADER_SIZE);
1330 if (res < RAS_TABLE_HEADER_SIZE) {
1331 DRM_ERROR("Failed to read EEPROM table header, res:%d", res);
1332 return res >= 0 ? -EIO : res;
1335 __decode_table_header_from_buf(hdr, buf);
1337 if (hdr->version == RAS_TABLE_VER_V2_1) {
1338 control->ras_num_recs = RAS_NUM_RECS_V2_1(hdr);
1339 control->ras_record_offset = RAS_RECORD_START_V2_1;
1340 control->ras_max_record_count = RAS_MAX_RECORD_COUNT_V2_1;
1342 control->ras_num_recs = RAS_NUM_RECS(hdr);
1343 control->ras_record_offset = RAS_RECORD_START;
1344 control->ras_max_record_count = RAS_MAX_RECORD_COUNT;
1346 control->ras_fri = RAS_OFFSET_TO_INDEX(control, hdr->first_rec_offset);
1348 if (hdr->header == RAS_TABLE_HDR_VAL) {
1349 DRM_DEBUG_DRIVER("Found existing EEPROM table with %d records",
1350 control->ras_num_recs);
1352 if (hdr->version == RAS_TABLE_VER_V2_1) {
1353 res = __read_table_ras_info(control);
1358 res = __verify_ras_table_checksum(control);
1360 DRM_ERROR("RAS table incorrect checksum or error:%d\n",
1363 /* Warn if we are at 90% of the threshold or above
1365 if (10 * control->ras_num_recs >= 9 * ras->bad_page_cnt_threshold)
1366 dev_warn(adev->dev, "RAS records:%u exceeds 90%% of threshold:%d",
1367 control->ras_num_recs,
1368 ras->bad_page_cnt_threshold);
1369 } else if (hdr->header == RAS_TABLE_HDR_BAD &&
1370 amdgpu_bad_page_threshold != 0) {
1371 if (hdr->version == RAS_TABLE_VER_V2_1) {
1372 res = __read_table_ras_info(control);
1377 res = __verify_ras_table_checksum(control);
1379 DRM_ERROR("RAS Table incorrect checksum or error:%d\n",
1381 if (ras->bad_page_cnt_threshold > control->ras_num_recs) {
1382 /* This means that, the threshold was increased since
1383 * the last time the system was booted, and now,
1384 * ras->bad_page_cnt_threshold - control->num_recs > 0,
1385 * so that at least one more record can be saved,
1386 * before the page count threshold is reached.
1389 "records:%d threshold:%d, resetting "
1390 "RAS table header signature",
1391 control->ras_num_recs,
1392 ras->bad_page_cnt_threshold);
1393 res = amdgpu_ras_eeprom_correct_header_tag(control,
1396 dev_err(adev->dev, "RAS records:%d exceed threshold:%d",
1397 control->ras_num_recs, ras->bad_page_cnt_threshold);
1398 if (amdgpu_bad_page_threshold == -1) {
1399 dev_warn(adev->dev, "GPU will be initialized due to bad_page_threshold = -1.");
1402 *exceed_err_limit = true;
1404 "RAS records:%d exceed threshold:%d, "
1405 "GPU will not be initialized. Replace this GPU or increase the threshold",
1406 control->ras_num_recs, ras->bad_page_cnt_threshold);
1410 DRM_INFO("Creating a new EEPROM table");
1412 res = amdgpu_ras_eeprom_reset_table(control);
1415 return res < 0 ? res : 0;