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 (adev->ip_versions[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, 6):
162 case IP_VERSION(13, 0, 10):
169 static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev,
170 struct amdgpu_ras_eeprom_control *control)
172 struct atom_context *atom_ctx = adev->mode_info.atom_context;
178 if (amdgpu_atomfirmware_ras_rom_addr(adev, &i2c_addr)) {
179 /* The address given by VBIOS is an 8-bit, wire-format
180 * address, i.e. the most significant byte.
182 * Normalize it to a 19-bit EEPROM address. Remove the
183 * device type identifier and make it a 7-bit address;
184 * then make it a 19-bit EEPROM address. See top of
187 i2c_addr = (i2c_addr & 0x0F) >> 1;
188 control->i2c_address = ((u32) i2c_addr) << 16;
193 switch (adev->ip_versions[MP1_HWIP][0]) {
194 case IP_VERSION(11, 0, 2):
195 /* VEGA20 and ARCTURUS */
196 if (adev->asic_type == CHIP_VEGA20)
197 control->i2c_address = EEPROM_I2C_MADDR_0;
198 else if (strnstr(atom_ctx->vbios_pn,
200 sizeof(atom_ctx->vbios_pn)))
201 control->i2c_address = EEPROM_I2C_MADDR_0;
203 control->i2c_address = EEPROM_I2C_MADDR_4;
205 case IP_VERSION(11, 0, 7):
206 control->i2c_address = EEPROM_I2C_MADDR_0;
208 case IP_VERSION(13, 0, 2):
209 if (strnstr(atom_ctx->vbios_pn, "D673",
210 sizeof(atom_ctx->vbios_pn)))
211 control->i2c_address = EEPROM_I2C_MADDR_4;
213 control->i2c_address = EEPROM_I2C_MADDR_0;
215 case IP_VERSION(13, 0, 0):
216 case IP_VERSION(13, 0, 6):
217 case IP_VERSION(13, 0, 10):
218 control->i2c_address = EEPROM_I2C_MADDR_4;
226 __encode_table_header_to_buf(struct amdgpu_ras_eeprom_table_header *hdr,
229 u32 *pp = (uint32_t *)buf;
231 pp[0] = cpu_to_le32(hdr->header);
232 pp[1] = cpu_to_le32(hdr->version);
233 pp[2] = cpu_to_le32(hdr->first_rec_offset);
234 pp[3] = cpu_to_le32(hdr->tbl_size);
235 pp[4] = cpu_to_le32(hdr->checksum);
239 __decode_table_header_from_buf(struct amdgpu_ras_eeprom_table_header *hdr,
242 u32 *pp = (uint32_t *)buf;
244 hdr->header = le32_to_cpu(pp[0]);
245 hdr->version = le32_to_cpu(pp[1]);
246 hdr->first_rec_offset = le32_to_cpu(pp[2]);
247 hdr->tbl_size = le32_to_cpu(pp[3]);
248 hdr->checksum = le32_to_cpu(pp[4]);
251 static int __write_table_header(struct amdgpu_ras_eeprom_control *control)
253 u8 buf[RAS_TABLE_HEADER_SIZE];
254 struct amdgpu_device *adev = to_amdgpu_device(control);
257 memset(buf, 0, sizeof(buf));
258 __encode_table_header_to_buf(&control->tbl_hdr, buf);
260 /* i2c may be unstable in gpu reset */
261 down_read(&adev->reset_domain->sem);
262 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
263 control->i2c_address +
264 control->ras_header_offset,
265 buf, RAS_TABLE_HEADER_SIZE);
266 up_read(&adev->reset_domain->sem);
269 DRM_ERROR("Failed to write EEPROM table header:%d", res);
270 } else if (res < RAS_TABLE_HEADER_SIZE) {
271 DRM_ERROR("Short write:%d out of %d\n",
272 res, RAS_TABLE_HEADER_SIZE);
282 __encode_table_ras_info_to_buf(struct amdgpu_ras_eeprom_table_ras_info *rai,
285 u32 *pp = (uint32_t *)buf;
288 tmp = ((uint32_t)(rai->rma_status) & 0xFF) |
289 (((uint32_t)(rai->health_percent) << 8) & 0xFF00) |
290 (((uint32_t)(rai->ecc_page_threshold) << 16) & 0xFFFF0000);
291 pp[0] = cpu_to_le32(tmp);
295 __decode_table_ras_info_from_buf(struct amdgpu_ras_eeprom_table_ras_info *rai,
298 u32 *pp = (uint32_t *)buf;
301 tmp = le32_to_cpu(pp[0]);
302 rai->rma_status = tmp & 0xFF;
303 rai->health_percent = (tmp >> 8) & 0xFF;
304 rai->ecc_page_threshold = (tmp >> 16) & 0xFFFF;
307 static int __write_table_ras_info(struct amdgpu_ras_eeprom_control *control)
309 struct amdgpu_device *adev = to_amdgpu_device(control);
313 buf = kzalloc(RAS_TABLE_V2_1_INFO_SIZE, GFP_KERNEL);
315 DRM_ERROR("Failed to alloc buf to write table ras info\n");
319 __encode_table_ras_info_to_buf(&control->tbl_rai, buf);
321 /* i2c may be unstable in gpu reset */
322 down_read(&adev->reset_domain->sem);
323 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
324 control->i2c_address +
325 control->ras_info_offset,
326 buf, RAS_TABLE_V2_1_INFO_SIZE);
327 up_read(&adev->reset_domain->sem);
330 DRM_ERROR("Failed to write EEPROM table ras info:%d", res);
331 } else if (res < RAS_TABLE_V2_1_INFO_SIZE) {
332 DRM_ERROR("Short write:%d out of %d\n",
333 res, RAS_TABLE_V2_1_INFO_SIZE);
344 static u8 __calc_hdr_byte_sum(const struct amdgpu_ras_eeprom_control *control)
350 /* Header checksum, skip checksum field in the calculation */
351 sz = sizeof(control->tbl_hdr) - sizeof(control->tbl_hdr.checksum);
352 pp = (u8 *) &control->tbl_hdr;
354 for (ii = 0; ii < sz; ii++, pp++)
360 static u8 __calc_ras_info_byte_sum(const struct amdgpu_ras_eeprom_control *control)
366 sz = sizeof(control->tbl_rai);
367 pp = (u8 *) &control->tbl_rai;
369 for (ii = 0; ii < sz; ii++, pp++)
375 static int amdgpu_ras_eeprom_correct_header_tag(
376 struct amdgpu_ras_eeprom_control *control,
379 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
384 csum = -hdr->checksum;
386 hh = (void *) &hdr->header;
387 csum -= (hh[0] + hh[1] + hh[2] + hh[3]);
388 hh = (void *) &header;
389 csum += hh[0] + hh[1] + hh[2] + hh[3];
391 mutex_lock(&control->ras_tbl_mutex);
392 hdr->header = header;
393 hdr->checksum = csum;
394 res = __write_table_header(control);
395 mutex_unlock(&control->ras_tbl_mutex);
401 * amdgpu_ras_eeprom_reset_table -- Reset the RAS EEPROM table
402 * @control: pointer to control structure
404 * Reset the contents of the header of the RAS EEPROM table.
405 * Return 0 on success, -errno on error.
407 int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control)
409 struct amdgpu_device *adev = to_amdgpu_device(control);
410 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
411 struct amdgpu_ras_eeprom_table_ras_info *rai = &control->tbl_rai;
412 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
416 mutex_lock(&control->ras_tbl_mutex);
418 hdr->header = RAS_TABLE_HDR_VAL;
420 adev->umc.ras->set_eeprom_table_version)
421 adev->umc.ras->set_eeprom_table_version(hdr);
423 hdr->version = RAS_TABLE_VER_V1;
425 if (hdr->version == RAS_TABLE_VER_V2_1) {
426 hdr->first_rec_offset = RAS_RECORD_START_V2_1;
427 hdr->tbl_size = RAS_TABLE_HEADER_SIZE +
428 RAS_TABLE_V2_1_INFO_SIZE;
429 rai->rma_status = GPU_HEALTH_USABLE;
431 * GPU health represented as a percentage.
432 * 0 means worst health, 100 means fully health.
434 rai->health_percent = 100;
435 /* ecc_page_threshold = 0 means disable bad page retirement */
436 rai->ecc_page_threshold = con->bad_page_cnt_threshold;
438 hdr->first_rec_offset = RAS_RECORD_START;
439 hdr->tbl_size = RAS_TABLE_HEADER_SIZE;
442 csum = __calc_hdr_byte_sum(control);
443 if (hdr->version == RAS_TABLE_VER_V2_1)
444 csum += __calc_ras_info_byte_sum(control);
446 hdr->checksum = csum;
447 res = __write_table_header(control);
448 if (!res && hdr->version > RAS_TABLE_VER_V1)
449 res = __write_table_ras_info(control);
451 control->ras_num_recs = 0;
452 control->ras_fri = 0;
454 amdgpu_dpm_send_hbm_bad_pages_num(adev, control->ras_num_recs);
456 control->bad_channel_bitmap = 0;
457 amdgpu_dpm_send_hbm_bad_channel_flag(adev, control->bad_channel_bitmap);
458 con->update_channel_flag = false;
460 amdgpu_ras_debugfs_set_ret_size(control);
462 mutex_unlock(&control->ras_tbl_mutex);
468 __encode_table_record_to_buf(struct amdgpu_ras_eeprom_control *control,
469 struct eeprom_table_record *record,
475 /* Next are all record fields according to EEPROM page spec in LE foramt */
476 buf[i++] = record->err_type;
478 buf[i++] = record->bank;
480 tmp = cpu_to_le64(record->ts);
481 memcpy(buf + i, &tmp, 8);
484 tmp = cpu_to_le64((record->offset & 0xffffffffffff));
485 memcpy(buf + i, &tmp, 6);
488 buf[i++] = record->mem_channel;
489 buf[i++] = record->mcumc_id;
491 tmp = cpu_to_le64((record->retired_page & 0xffffffffffff));
492 memcpy(buf + i, &tmp, 6);
496 __decode_table_record_from_buf(struct amdgpu_ras_eeprom_control *control,
497 struct eeprom_table_record *record,
503 /* Next are all record fields according to EEPROM page spec in LE foramt */
504 record->err_type = buf[i++];
506 record->bank = buf[i++];
508 memcpy(&tmp, buf + i, 8);
509 record->ts = le64_to_cpu(tmp);
512 memcpy(&tmp, buf + i, 6);
513 record->offset = (le64_to_cpu(tmp) & 0xffffffffffff);
516 record->mem_channel = buf[i++];
517 record->mcumc_id = buf[i++];
519 memcpy(&tmp, buf + i, 6);
520 record->retired_page = (le64_to_cpu(tmp) & 0xffffffffffff);
523 bool amdgpu_ras_eeprom_check_err_threshold(struct amdgpu_device *adev)
525 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
527 if (!__is_ras_eeprom_supported(adev) ||
528 !amdgpu_bad_page_threshold)
531 /* skip check eeprom table for VEGA20 Gaming */
535 if (!(con->features & BIT(AMDGPU_RAS_BLOCK__UMC)))
538 if (con->eeprom_control.tbl_hdr.header == RAS_TABLE_HDR_BAD) {
539 if (amdgpu_bad_page_threshold == -1) {
540 dev_warn(adev->dev, "RAS records:%d exceed threshold:%d",
541 con->eeprom_control.ras_num_recs, con->bad_page_cnt_threshold);
543 "But GPU can be operated due to bad_page_threshold = -1.\n");
546 dev_warn(adev->dev, "This GPU is in BAD status.");
547 dev_warn(adev->dev, "Please retire it or set a larger "
548 "threshold value when reloading driver.\n");
557 * __amdgpu_ras_eeprom_write -- write indexed from buffer to EEPROM
558 * @control: pointer to control structure
559 * @buf: pointer to buffer containing data to write
560 * @fri: start writing at this index
561 * @num: number of records to write
563 * The caller must hold the table mutex in @control.
564 * Return 0 on success, -errno otherwise.
566 static int __amdgpu_ras_eeprom_write(struct amdgpu_ras_eeprom_control *control,
567 u8 *buf, const u32 fri, const u32 num)
569 struct amdgpu_device *adev = to_amdgpu_device(control);
573 /* i2c may be unstable in gpu reset */
574 down_read(&adev->reset_domain->sem);
575 buf_size = num * RAS_TABLE_RECORD_SIZE;
576 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
577 control->i2c_address +
578 RAS_INDEX_TO_OFFSET(control, fri),
580 up_read(&adev->reset_domain->sem);
582 DRM_ERROR("Writing %d EEPROM table records error:%d",
584 } else if (res < buf_size) {
585 /* Short write, return error.
587 DRM_ERROR("Wrote %d records out of %d",
588 res / RAS_TABLE_RECORD_SIZE, num);
598 amdgpu_ras_eeprom_append_table(struct amdgpu_ras_eeprom_control *control,
599 struct eeprom_table_record *record,
602 struct amdgpu_ras *con = amdgpu_ras_get_context(to_amdgpu_device(control));
607 buf = kcalloc(num, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
611 /* Encode all of them in one go.
614 for (i = 0; i < num; i++, pp += RAS_TABLE_RECORD_SIZE) {
615 __encode_table_record_to_buf(control, &record[i], pp);
617 /* update bad channel bitmap */
618 if (!(control->bad_channel_bitmap & (1 << record[i].mem_channel))) {
619 control->bad_channel_bitmap |= 1 << record[i].mem_channel;
620 con->update_channel_flag = true;
624 /* a, first record index to write into.
625 * b, last record index to write into.
626 * a = first index to read (fri) + number of records in the table,
628 * Let N = control->ras_max_num_record_count, then we have,
629 * case 0: 0 <= a <= b < N,
630 * just append @num records starting at a;
631 * case 1: 0 <= a < N <= b,
632 * append (N - a) records starting at a, and
633 * append the remainder, b % N + 1, starting at 0.
634 * case 2: 0 <= fri < N <= a <= b, then modulo N we get two subcases,
635 * case 2a: 0 <= a <= b < N
636 * append num records starting at a; and fix fri if b overwrote it,
637 * and since a <= b, if b overwrote it then a must've also,
638 * and if b didn't overwrite it, then a didn't also.
639 * case 2b: 0 <= b < a < N
640 * write num records starting at a, which wraps around 0=N
641 * and overwrite fri unconditionally. Now from case 2a,
642 * this means that b eclipsed fri to overwrite it and wrap
643 * around 0 again, i.e. b = 2N+r pre modulo N, so we unconditionally
644 * set fri = b + 1 (mod N).
645 * Now, since fri is updated in every case, except the trivial case 0,
646 * the number of records present in the table after writing, is,
647 * num_recs - 1 = b - fri (mod N), and we take the positive value,
648 * by adding an arbitrary multiple of N before taking the modulo N
651 a = control->ras_fri + control->ras_num_recs;
653 if (b < control->ras_max_record_count) {
654 res = __amdgpu_ras_eeprom_write(control, buf, a, num);
655 } else if (a < control->ras_max_record_count) {
658 g0 = control->ras_max_record_count - a;
659 g1 = b % control->ras_max_record_count + 1;
660 res = __amdgpu_ras_eeprom_write(control, buf, a, g0);
663 res = __amdgpu_ras_eeprom_write(control,
664 buf + g0 * RAS_TABLE_RECORD_SIZE,
668 if (g1 > control->ras_fri)
669 control->ras_fri = g1 % control->ras_max_record_count;
671 a %= control->ras_max_record_count;
672 b %= control->ras_max_record_count;
675 /* Note that, b - a + 1 = num. */
676 res = __amdgpu_ras_eeprom_write(control, buf, a, num);
679 if (b >= control->ras_fri)
680 control->ras_fri = (b + 1) % control->ras_max_record_count;
684 /* b < a, which means, we write from
685 * a to the end of the table, and from
686 * the start of the table to b.
688 g0 = control->ras_max_record_count - a;
690 res = __amdgpu_ras_eeprom_write(control, buf, a, g0);
693 res = __amdgpu_ras_eeprom_write(control,
694 buf + g0 * RAS_TABLE_RECORD_SIZE,
698 control->ras_fri = g1 % control->ras_max_record_count;
701 control->ras_num_recs = 1 + (control->ras_max_record_count + b
703 % control->ras_max_record_count;
710 amdgpu_ras_eeprom_update_header(struct amdgpu_ras_eeprom_control *control)
712 struct amdgpu_device *adev = to_amdgpu_device(control);
713 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
718 /* Modify the header if it exceeds.
720 if (amdgpu_bad_page_threshold != 0 &&
721 control->ras_num_recs >= ras->bad_page_cnt_threshold) {
723 "Saved bad pages %d reaches threshold value %d\n",
724 control->ras_num_recs, ras->bad_page_cnt_threshold);
725 control->tbl_hdr.header = RAS_TABLE_HDR_BAD;
726 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1) {
727 control->tbl_rai.rma_status = GPU_RETIRED__ECC_REACH_THRESHOLD;
728 control->tbl_rai.health_percent = 0;
732 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
733 control->tbl_hdr.tbl_size = RAS_TABLE_HEADER_SIZE +
734 RAS_TABLE_V2_1_INFO_SIZE +
735 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
737 control->tbl_hdr.tbl_size = RAS_TABLE_HEADER_SIZE +
738 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
739 control->tbl_hdr.checksum = 0;
741 buf_size = control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
742 buf = kcalloc(control->ras_num_recs, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
744 DRM_ERROR("allocating memory for table of size %d bytes failed\n",
745 control->tbl_hdr.tbl_size);
750 down_read(&adev->reset_domain->sem);
751 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
752 control->i2c_address +
753 control->ras_record_offset,
755 up_read(&adev->reset_domain->sem);
757 DRM_ERROR("EEPROM failed reading records:%d\n",
760 } else if (res < buf_size) {
761 DRM_ERROR("EEPROM read %d out of %d bytes\n",
768 * bad page records have been stored in eeprom,
769 * now calculate gpu health percent
771 if (amdgpu_bad_page_threshold != 0 &&
772 control->tbl_hdr.version == RAS_TABLE_VER_V2_1 &&
773 control->ras_num_recs < ras->bad_page_cnt_threshold)
774 control->tbl_rai.health_percent = ((ras->bad_page_cnt_threshold -
775 control->ras_num_recs) * 100) /
776 ras->bad_page_cnt_threshold;
778 /* Recalc the checksum.
781 for (pp = buf; pp < buf + buf_size; pp++)
784 csum += __calc_hdr_byte_sum(control);
785 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
786 csum += __calc_ras_info_byte_sum(control);
787 /* avoid sign extension when assigning to "checksum" */
789 control->tbl_hdr.checksum = csum;
790 res = __write_table_header(control);
791 if (!res && control->tbl_hdr.version > RAS_TABLE_VER_V1)
792 res = __write_table_ras_info(control);
799 * amdgpu_ras_eeprom_append -- append records to the EEPROM RAS table
800 * @control: pointer to control structure
801 * @record: array of records to append
802 * @num: number of records in @record array
804 * Append @num records to the table, calculate the checksum and write
805 * the table back to EEPROM. The maximum number of records that
806 * can be appended is between 1 and control->ras_max_record_count,
807 * regardless of how many records are already stored in the table.
809 * Return 0 on success or if EEPROM is not supported, -errno on error.
811 int amdgpu_ras_eeprom_append(struct amdgpu_ras_eeprom_control *control,
812 struct eeprom_table_record *record,
815 struct amdgpu_device *adev = to_amdgpu_device(control);
818 if (!__is_ras_eeprom_supported(adev))
822 DRM_ERROR("will not append 0 records\n");
824 } else if (num > control->ras_max_record_count) {
825 DRM_ERROR("cannot append %d records than the size of table %d\n",
826 num, control->ras_max_record_count);
830 mutex_lock(&control->ras_tbl_mutex);
832 res = amdgpu_ras_eeprom_append_table(control, record, num);
834 res = amdgpu_ras_eeprom_update_header(control);
836 amdgpu_ras_debugfs_set_ret_size(control);
838 mutex_unlock(&control->ras_tbl_mutex);
843 * __amdgpu_ras_eeprom_read -- read indexed from EEPROM into buffer
844 * @control: pointer to control structure
845 * @buf: pointer to buffer to read into
846 * @fri: first record index, start reading at this index, absolute index
847 * @num: number of records to read
849 * The caller must hold the table mutex in @control.
850 * Return 0 on success, -errno otherwise.
852 static int __amdgpu_ras_eeprom_read(struct amdgpu_ras_eeprom_control *control,
853 u8 *buf, const u32 fri, const u32 num)
855 struct amdgpu_device *adev = to_amdgpu_device(control);
859 /* i2c may be unstable in gpu reset */
860 down_read(&adev->reset_domain->sem);
861 buf_size = num * RAS_TABLE_RECORD_SIZE;
862 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
863 control->i2c_address +
864 RAS_INDEX_TO_OFFSET(control, fri),
866 up_read(&adev->reset_domain->sem);
868 DRM_ERROR("Reading %d EEPROM table records error:%d",
870 } else if (res < buf_size) {
871 /* Short read, return error.
873 DRM_ERROR("Read %d records out of %d",
874 res / RAS_TABLE_RECORD_SIZE, num);
884 * amdgpu_ras_eeprom_read -- read EEPROM
885 * @control: pointer to control structure
886 * @record: array of records to read into
887 * @num: number of records in @record
889 * Reads num records from the RAS table in EEPROM and
890 * writes the data into @record array.
892 * Returns 0 on success, -errno on error.
894 int amdgpu_ras_eeprom_read(struct amdgpu_ras_eeprom_control *control,
895 struct eeprom_table_record *record,
898 struct amdgpu_device *adev = to_amdgpu_device(control);
899 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
904 if (!__is_ras_eeprom_supported(adev))
908 DRM_ERROR("will not read 0 records\n");
910 } else if (num > control->ras_num_recs) {
911 DRM_ERROR("too many records to read:%d available:%d\n",
912 num, control->ras_num_recs);
916 buf = kcalloc(num, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
920 /* Determine how many records to read, from the first record
921 * index, fri, to the end of the table, and from the beginning
922 * of the table, such that the total number of records is
923 * @num, and we handle wrap around when fri > 0 and
924 * fri + num > RAS_MAX_RECORD_COUNT.
926 * First we compute the index of the last element
927 * which would be fetched from each region,
928 * g0 is in [fri, fri + num - 1], and
929 * g1 is in [0, RAS_MAX_RECORD_COUNT - 1].
930 * Then, if g0 < RAS_MAX_RECORD_COUNT, the index of
931 * the last element to fetch, we set g0 to _the number_
932 * of elements to fetch, @num, since we know that the last
933 * indexed to be fetched does not exceed the table.
935 * If, however, g0 >= RAS_MAX_RECORD_COUNT, then
936 * we set g0 to the number of elements to read
937 * until the end of the table, and g1 to the number of
938 * elements to read from the beginning of the table.
940 g0 = control->ras_fri + num - 1;
941 g1 = g0 % control->ras_max_record_count;
942 if (g0 < control->ras_max_record_count) {
946 g0 = control->ras_max_record_count - control->ras_fri;
950 mutex_lock(&control->ras_tbl_mutex);
951 res = __amdgpu_ras_eeprom_read(control, buf, control->ras_fri, g0);
955 res = __amdgpu_ras_eeprom_read(control,
956 buf + g0 * RAS_TABLE_RECORD_SIZE,
964 /* Read up everything? Then transform.
967 for (i = 0; i < num; i++, pp += RAS_TABLE_RECORD_SIZE) {
968 __decode_table_record_from_buf(control, &record[i], pp);
970 /* update bad channel bitmap */
971 if (!(control->bad_channel_bitmap & (1 << record[i].mem_channel))) {
972 control->bad_channel_bitmap |= 1 << record[i].mem_channel;
973 con->update_channel_flag = true;
978 mutex_unlock(&control->ras_tbl_mutex);
983 uint32_t amdgpu_ras_eeprom_max_record_count(struct amdgpu_ras_eeprom_control *control)
985 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
986 return RAS_MAX_RECORD_COUNT_V2_1;
988 return RAS_MAX_RECORD_COUNT;
992 amdgpu_ras_debugfs_eeprom_size_read(struct file *f, char __user *buf,
993 size_t size, loff_t *pos)
995 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
996 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
997 struct amdgpu_ras_eeprom_control *control = ras ? &ras->eeprom_control : NULL;
1004 if (!ras || !control) {
1005 res = snprintf(data, sizeof(data), "Not supported\n");
1007 res = snprintf(data, sizeof(data), "%d bytes or %d records\n",
1008 RAS_TBL_SIZE_BYTES, control->ras_max_record_count);
1015 res = min_t(size_t, res, size);
1017 if (copy_to_user(buf, &data[*pos], res))
1025 const struct file_operations amdgpu_ras_debugfs_eeprom_size_ops = {
1026 .owner = THIS_MODULE,
1027 .read = amdgpu_ras_debugfs_eeprom_size_read,
1029 .llseek = default_llseek,
1032 static const char *tbl_hdr_str = " Signature Version FirstOffs Size Checksum\n";
1033 static const char *tbl_hdr_fmt = "0x%08X 0x%08X 0x%08X 0x%08X 0x%08X\n";
1034 #define tbl_hdr_fmt_size (5 * (2+8) + 4 + 1)
1035 static const char *rec_hdr_str = "Index Offset ErrType Bank/CU TimeStamp Offs/Addr MemChl MCUMCID RetiredPage\n";
1036 static const char *rec_hdr_fmt = "%5d 0x%05X %7s 0x%02X 0x%016llX 0x%012llX 0x%02X 0x%02X 0x%012llX\n";
1037 #define rec_hdr_fmt_size (5 + 1 + 7 + 1 + 7 + 1 + 7 + 1 + 18 + 1 + 14 + 1 + 6 + 1 + 7 + 1 + 14 + 1)
1039 static const char *record_err_type_str[AMDGPU_RAS_EEPROM_ERR_COUNT] = {
1045 static loff_t amdgpu_ras_debugfs_table_size(struct amdgpu_ras_eeprom_control *control)
1047 return strlen(tbl_hdr_str) + tbl_hdr_fmt_size +
1048 strlen(rec_hdr_str) + rec_hdr_fmt_size * control->ras_num_recs;
1051 void amdgpu_ras_debugfs_set_ret_size(struct amdgpu_ras_eeprom_control *control)
1053 struct amdgpu_ras *ras = container_of(control, struct amdgpu_ras,
1055 struct dentry *de = ras->de_ras_eeprom_table;
1058 d_inode(de)->i_size = amdgpu_ras_debugfs_table_size(control);
1061 static ssize_t amdgpu_ras_debugfs_table_read(struct file *f, char __user *buf,
1062 size_t size, loff_t *pos)
1064 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1065 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1066 struct amdgpu_ras_eeprom_control *control = &ras->eeprom_control;
1067 const size_t orig_size = size;
1071 mutex_lock(&control->ras_tbl_mutex);
1073 /* We want *pos - data_len > 0, which means there's
1074 * bytes to be printed from data.
1076 data_len = strlen(tbl_hdr_str);
1077 if (*pos < data_len) {
1079 data_len = min_t(size_t, data_len, size);
1080 if (copy_to_user(buf, &tbl_hdr_str[*pos], data_len))
1087 data_len = strlen(tbl_hdr_str) + tbl_hdr_fmt_size;
1088 if (*pos < data_len && size > 0) {
1089 u8 data[tbl_hdr_fmt_size + 1];
1092 snprintf(data, sizeof(data), tbl_hdr_fmt,
1093 control->tbl_hdr.header,
1094 control->tbl_hdr.version,
1095 control->tbl_hdr.first_rec_offset,
1096 control->tbl_hdr.tbl_size,
1097 control->tbl_hdr.checksum);
1100 data_len = min_t(size_t, data_len, size);
1101 lpos = *pos - strlen(tbl_hdr_str);
1102 if (copy_to_user(buf, &data[lpos], data_len))
1109 data_len = strlen(tbl_hdr_str) + tbl_hdr_fmt_size + strlen(rec_hdr_str);
1110 if (*pos < data_len && size > 0) {
1114 data_len = min_t(size_t, data_len, size);
1115 lpos = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size;
1116 if (copy_to_user(buf, &rec_hdr_str[lpos], data_len))
1123 data_len = amdgpu_ras_debugfs_table_size(control);
1124 if (*pos < data_len && size > 0) {
1125 u8 dare[RAS_TABLE_RECORD_SIZE];
1126 u8 data[rec_hdr_fmt_size + 1];
1127 struct eeprom_table_record record;
1130 /* Find the starting record index
1132 s = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size -
1133 strlen(rec_hdr_str);
1134 s = s / rec_hdr_fmt_size;
1135 r = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size -
1136 strlen(rec_hdr_str);
1137 r = r % rec_hdr_fmt_size;
1139 for ( ; size > 0 && s < control->ras_num_recs; s++) {
1140 u32 ai = RAS_RI_TO_AI(control, s);
1141 /* Read a single record
1143 res = __amdgpu_ras_eeprom_read(control, dare, ai, 1);
1146 __decode_table_record_from_buf(control, &record, dare);
1147 snprintf(data, sizeof(data), rec_hdr_fmt,
1149 RAS_INDEX_TO_OFFSET(control, ai),
1150 record_err_type_str[record.err_type],
1156 record.retired_page);
1158 data_len = min_t(size_t, rec_hdr_fmt_size - r, size);
1159 if (copy_to_user(buf, &data[r], data_len)) {
1171 mutex_unlock(&control->ras_tbl_mutex);
1172 return res < 0 ? res : orig_size - size;
1176 amdgpu_ras_debugfs_eeprom_table_read(struct file *f, char __user *buf,
1177 size_t size, loff_t *pos)
1179 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1180 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1181 struct amdgpu_ras_eeprom_control *control = ras ? &ras->eeprom_control : NULL;
1188 if (!ras || !control) {
1189 res = snprintf(data, sizeof(data), "Not supported\n");
1194 res = min_t(size_t, res, size);
1196 if (copy_to_user(buf, &data[*pos], res))
1203 return amdgpu_ras_debugfs_table_read(f, buf, size, pos);
1207 const struct file_operations amdgpu_ras_debugfs_eeprom_table_ops = {
1208 .owner = THIS_MODULE,
1209 .read = amdgpu_ras_debugfs_eeprom_table_read,
1211 .llseek = default_llseek,
1215 * __verify_ras_table_checksum -- verify the RAS EEPROM table checksum
1216 * @control: pointer to control structure
1218 * Check the checksum of the stored in EEPROM RAS table.
1220 * Return 0 if the checksum is correct,
1221 * positive if it is not correct, and
1222 * -errno on I/O error.
1224 static int __verify_ras_table_checksum(struct amdgpu_ras_eeprom_control *control)
1226 struct amdgpu_device *adev = to_amdgpu_device(control);
1230 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
1231 buf_size = RAS_TABLE_HEADER_SIZE +
1232 RAS_TABLE_V2_1_INFO_SIZE +
1233 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
1235 buf_size = RAS_TABLE_HEADER_SIZE +
1236 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
1238 buf = kzalloc(buf_size, GFP_KERNEL);
1240 DRM_ERROR("Out of memory checking RAS table checksum.\n");
1244 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1245 control->i2c_address +
1246 control->ras_header_offset,
1248 if (res < buf_size) {
1249 DRM_ERROR("Partial read for checksum, res:%d\n", res);
1250 /* On partial reads, return -EIO.
1258 for (pp = buf; pp < buf + buf_size; pp++)
1262 return res < 0 ? res : csum;
1265 static int __read_table_ras_info(struct amdgpu_ras_eeprom_control *control)
1267 struct amdgpu_ras_eeprom_table_ras_info *rai = &control->tbl_rai;
1268 struct amdgpu_device *adev = to_amdgpu_device(control);
1272 buf = kzalloc(RAS_TABLE_V2_1_INFO_SIZE, GFP_KERNEL);
1274 DRM_ERROR("Failed to alloc buf to read EEPROM table ras info\n");
1279 * EEPROM table V2_1 supports ras info,
1280 * read EEPROM table ras info
1282 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1283 control->i2c_address + control->ras_info_offset,
1284 buf, RAS_TABLE_V2_1_INFO_SIZE);
1285 if (res < RAS_TABLE_V2_1_INFO_SIZE) {
1286 DRM_ERROR("Failed to read EEPROM table ras info, res:%d", res);
1287 res = res >= 0 ? -EIO : res;
1291 __decode_table_ras_info_from_buf(rai, buf);
1295 return res == RAS_TABLE_V2_1_INFO_SIZE ? 0 : res;
1298 int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control,
1299 bool *exceed_err_limit)
1301 struct amdgpu_device *adev = to_amdgpu_device(control);
1302 unsigned char buf[RAS_TABLE_HEADER_SIZE] = { 0 };
1303 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
1304 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1307 *exceed_err_limit = false;
1309 if (!__is_ras_eeprom_supported(adev))
1312 /* Verify i2c adapter is initialized */
1313 if (!adev->pm.ras_eeprom_i2c_bus || !adev->pm.ras_eeprom_i2c_bus->algo)
1316 if (!__get_eeprom_i2c_addr(adev, control))
1319 control->ras_header_offset = RAS_HDR_START;
1320 control->ras_info_offset = RAS_TABLE_V2_1_INFO_START;
1321 mutex_init(&control->ras_tbl_mutex);
1323 /* Read the table header from EEPROM address */
1324 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1325 control->i2c_address + control->ras_header_offset,
1326 buf, RAS_TABLE_HEADER_SIZE);
1327 if (res < RAS_TABLE_HEADER_SIZE) {
1328 DRM_ERROR("Failed to read EEPROM table header, res:%d", res);
1329 return res >= 0 ? -EIO : res;
1332 __decode_table_header_from_buf(hdr, buf);
1334 if (hdr->version == RAS_TABLE_VER_V2_1) {
1335 control->ras_num_recs = RAS_NUM_RECS_V2_1(hdr);
1336 control->ras_record_offset = RAS_RECORD_START_V2_1;
1337 control->ras_max_record_count = RAS_MAX_RECORD_COUNT_V2_1;
1339 control->ras_num_recs = RAS_NUM_RECS(hdr);
1340 control->ras_record_offset = RAS_RECORD_START;
1341 control->ras_max_record_count = RAS_MAX_RECORD_COUNT;
1343 control->ras_fri = RAS_OFFSET_TO_INDEX(control, hdr->first_rec_offset);
1345 if (hdr->header == RAS_TABLE_HDR_VAL) {
1346 DRM_DEBUG_DRIVER("Found existing EEPROM table with %d records",
1347 control->ras_num_recs);
1349 if (hdr->version == RAS_TABLE_VER_V2_1) {
1350 res = __read_table_ras_info(control);
1355 res = __verify_ras_table_checksum(control);
1357 DRM_ERROR("RAS table incorrect checksum or error:%d\n",
1360 /* Warn if we are at 90% of the threshold or above
1362 if (10 * control->ras_num_recs >= 9 * ras->bad_page_cnt_threshold)
1363 dev_warn(adev->dev, "RAS records:%u exceeds 90%% of threshold:%d",
1364 control->ras_num_recs,
1365 ras->bad_page_cnt_threshold);
1366 } else if (hdr->header == RAS_TABLE_HDR_BAD &&
1367 amdgpu_bad_page_threshold != 0) {
1368 if (hdr->version == RAS_TABLE_VER_V2_1) {
1369 res = __read_table_ras_info(control);
1374 res = __verify_ras_table_checksum(control);
1376 DRM_ERROR("RAS Table incorrect checksum or error:%d\n",
1378 if (ras->bad_page_cnt_threshold > control->ras_num_recs) {
1379 /* This means that, the threshold was increased since
1380 * the last time the system was booted, and now,
1381 * ras->bad_page_cnt_threshold - control->num_recs > 0,
1382 * so that at least one more record can be saved,
1383 * before the page count threshold is reached.
1386 "records:%d threshold:%d, resetting "
1387 "RAS table header signature",
1388 control->ras_num_recs,
1389 ras->bad_page_cnt_threshold);
1390 res = amdgpu_ras_eeprom_correct_header_tag(control,
1393 dev_err(adev->dev, "RAS records:%d exceed threshold:%d",
1394 control->ras_num_recs, ras->bad_page_cnt_threshold);
1395 if (amdgpu_bad_page_threshold == -1) {
1396 dev_warn(adev->dev, "GPU will be initialized due to bad_page_threshold = -1.");
1399 *exceed_err_limit = true;
1401 "RAS records:%d exceed threshold:%d, "
1402 "GPU will not be initialized. Replace this GPU or increase the threshold",
1403 control->ras_num_recs, ras->bad_page_cnt_threshold);
1407 DRM_INFO("Creating a new EEPROM table");
1409 res = amdgpu_ras_eeprom_reset_table(control);
1412 return res < 0 ? res : 0;