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 below 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 case IP_VERSION(13, 0, 14):
165 return (adev->gmc.is_app_apu) ? false : true;
171 static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev,
172 struct amdgpu_ras_eeprom_control *control)
174 struct atom_context *atom_ctx = adev->mode_info.atom_context;
180 if (amdgpu_atomfirmware_ras_rom_addr(adev, &i2c_addr)) {
181 /* The address given by VBIOS is an 8-bit, wire-format
182 * address, i.e. the most significant byte.
184 * Normalize it to a 19-bit EEPROM address. Remove the
185 * device type identifier and make it a 7-bit address;
186 * then make it a 19-bit EEPROM address. See top of
189 i2c_addr = (i2c_addr & 0x0F) >> 1;
190 control->i2c_address = ((u32) i2c_addr) << 16;
195 switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
196 case IP_VERSION(11, 0, 2):
197 /* VEGA20 and ARCTURUS */
198 if (adev->asic_type == CHIP_VEGA20)
199 control->i2c_address = EEPROM_I2C_MADDR_0;
200 else if (strnstr(atom_ctx->vbios_pn,
202 sizeof(atom_ctx->vbios_pn)))
203 control->i2c_address = EEPROM_I2C_MADDR_0;
205 control->i2c_address = EEPROM_I2C_MADDR_4;
207 case IP_VERSION(11, 0, 7):
208 control->i2c_address = EEPROM_I2C_MADDR_0;
210 case IP_VERSION(13, 0, 2):
211 if (strnstr(atom_ctx->vbios_pn, "D673",
212 sizeof(atom_ctx->vbios_pn)))
213 control->i2c_address = EEPROM_I2C_MADDR_4;
215 control->i2c_address = EEPROM_I2C_MADDR_0;
217 case IP_VERSION(13, 0, 0):
218 if (strnstr(atom_ctx->vbios_pn, "D707",
219 sizeof(atom_ctx->vbios_pn)))
220 control->i2c_address = EEPROM_I2C_MADDR_0;
222 control->i2c_address = EEPROM_I2C_MADDR_4;
224 case IP_VERSION(13, 0, 6):
225 case IP_VERSION(13, 0, 10):
226 case IP_VERSION(13, 0, 14):
227 control->i2c_address = EEPROM_I2C_MADDR_4;
235 __encode_table_header_to_buf(struct amdgpu_ras_eeprom_table_header *hdr,
238 u32 *pp = (uint32_t *)buf;
240 pp[0] = cpu_to_le32(hdr->header);
241 pp[1] = cpu_to_le32(hdr->version);
242 pp[2] = cpu_to_le32(hdr->first_rec_offset);
243 pp[3] = cpu_to_le32(hdr->tbl_size);
244 pp[4] = cpu_to_le32(hdr->checksum);
248 __decode_table_header_from_buf(struct amdgpu_ras_eeprom_table_header *hdr,
251 u32 *pp = (uint32_t *)buf;
253 hdr->header = le32_to_cpu(pp[0]);
254 hdr->version = le32_to_cpu(pp[1]);
255 hdr->first_rec_offset = le32_to_cpu(pp[2]);
256 hdr->tbl_size = le32_to_cpu(pp[3]);
257 hdr->checksum = le32_to_cpu(pp[4]);
260 static int __write_table_header(struct amdgpu_ras_eeprom_control *control)
262 u8 buf[RAS_TABLE_HEADER_SIZE];
263 struct amdgpu_device *adev = to_amdgpu_device(control);
266 memset(buf, 0, sizeof(buf));
267 __encode_table_header_to_buf(&control->tbl_hdr, buf);
269 /* i2c may be unstable in gpu reset */
270 down_read(&adev->reset_domain->sem);
271 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
272 control->i2c_address +
273 control->ras_header_offset,
274 buf, RAS_TABLE_HEADER_SIZE);
275 up_read(&adev->reset_domain->sem);
278 DRM_ERROR("Failed to write EEPROM table header:%d", res);
279 } else if (res < RAS_TABLE_HEADER_SIZE) {
280 DRM_ERROR("Short write:%d out of %d\n",
281 res, RAS_TABLE_HEADER_SIZE);
291 __encode_table_ras_info_to_buf(struct amdgpu_ras_eeprom_table_ras_info *rai,
294 u32 *pp = (uint32_t *)buf;
297 tmp = ((uint32_t)(rai->rma_status) & 0xFF) |
298 (((uint32_t)(rai->health_percent) << 8) & 0xFF00) |
299 (((uint32_t)(rai->ecc_page_threshold) << 16) & 0xFFFF0000);
300 pp[0] = cpu_to_le32(tmp);
304 __decode_table_ras_info_from_buf(struct amdgpu_ras_eeprom_table_ras_info *rai,
307 u32 *pp = (uint32_t *)buf;
310 tmp = le32_to_cpu(pp[0]);
311 rai->rma_status = tmp & 0xFF;
312 rai->health_percent = (tmp >> 8) & 0xFF;
313 rai->ecc_page_threshold = (tmp >> 16) & 0xFFFF;
316 static int __write_table_ras_info(struct amdgpu_ras_eeprom_control *control)
318 struct amdgpu_device *adev = to_amdgpu_device(control);
322 buf = kzalloc(RAS_TABLE_V2_1_INFO_SIZE, GFP_KERNEL);
324 DRM_ERROR("Failed to alloc buf to write table ras info\n");
328 __encode_table_ras_info_to_buf(&control->tbl_rai, buf);
330 /* i2c may be unstable in gpu reset */
331 down_read(&adev->reset_domain->sem);
332 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
333 control->i2c_address +
334 control->ras_info_offset,
335 buf, RAS_TABLE_V2_1_INFO_SIZE);
336 up_read(&adev->reset_domain->sem);
339 DRM_ERROR("Failed to write EEPROM table ras info:%d", res);
340 } else if (res < RAS_TABLE_V2_1_INFO_SIZE) {
341 DRM_ERROR("Short write:%d out of %d\n",
342 res, RAS_TABLE_V2_1_INFO_SIZE);
353 static u8 __calc_hdr_byte_sum(const struct amdgpu_ras_eeprom_control *control)
359 /* Header checksum, skip checksum field in the calculation */
360 sz = sizeof(control->tbl_hdr) - sizeof(control->tbl_hdr.checksum);
361 pp = (u8 *) &control->tbl_hdr;
363 for (ii = 0; ii < sz; ii++, pp++)
369 static u8 __calc_ras_info_byte_sum(const struct amdgpu_ras_eeprom_control *control)
375 sz = sizeof(control->tbl_rai);
376 pp = (u8 *) &control->tbl_rai;
378 for (ii = 0; ii < sz; ii++, pp++)
384 static int amdgpu_ras_eeprom_correct_header_tag(
385 struct amdgpu_ras_eeprom_control *control,
388 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
393 csum = -hdr->checksum;
395 hh = (void *) &hdr->header;
396 csum -= (hh[0] + hh[1] + hh[2] + hh[3]);
397 hh = (void *) &header;
398 csum += hh[0] + hh[1] + hh[2] + hh[3];
400 mutex_lock(&control->ras_tbl_mutex);
401 hdr->header = header;
402 hdr->checksum = csum;
403 res = __write_table_header(control);
404 mutex_unlock(&control->ras_tbl_mutex);
409 static void amdgpu_ras_set_eeprom_table_version(struct amdgpu_ras_eeprom_control *control)
411 struct amdgpu_device *adev = to_amdgpu_device(control);
412 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
414 switch (amdgpu_ip_version(adev, UMC_HWIP, 0)) {
415 case IP_VERSION(8, 10, 0):
416 case IP_VERSION(12, 0, 0):
417 hdr->version = RAS_TABLE_VER_V2_1;
420 hdr->version = RAS_TABLE_VER_V1;
426 * amdgpu_ras_eeprom_reset_table -- Reset the RAS EEPROM table
427 * @control: pointer to control structure
429 * Reset the contents of the header of the RAS EEPROM table.
430 * Return 0 on success, -errno on error.
432 int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control)
434 struct amdgpu_device *adev = to_amdgpu_device(control);
435 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
436 struct amdgpu_ras_eeprom_table_ras_info *rai = &control->tbl_rai;
437 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
441 mutex_lock(&control->ras_tbl_mutex);
443 hdr->header = RAS_TABLE_HDR_VAL;
444 amdgpu_ras_set_eeprom_table_version(control);
446 if (hdr->version == RAS_TABLE_VER_V2_1) {
447 hdr->first_rec_offset = RAS_RECORD_START_V2_1;
448 hdr->tbl_size = RAS_TABLE_HEADER_SIZE +
449 RAS_TABLE_V2_1_INFO_SIZE;
450 rai->rma_status = GPU_HEALTH_USABLE;
452 * GPU health represented as a percentage.
453 * 0 means worst health, 100 means fully health.
455 rai->health_percent = 100;
456 /* ecc_page_threshold = 0 means disable bad page retirement */
457 rai->ecc_page_threshold = con->bad_page_cnt_threshold;
459 hdr->first_rec_offset = RAS_RECORD_START;
460 hdr->tbl_size = RAS_TABLE_HEADER_SIZE;
463 csum = __calc_hdr_byte_sum(control);
464 if (hdr->version == RAS_TABLE_VER_V2_1)
465 csum += __calc_ras_info_byte_sum(control);
467 hdr->checksum = csum;
468 res = __write_table_header(control);
469 if (!res && hdr->version > RAS_TABLE_VER_V1)
470 res = __write_table_ras_info(control);
472 control->ras_num_recs = 0;
473 control->ras_fri = 0;
475 amdgpu_dpm_send_hbm_bad_pages_num(adev, control->ras_num_recs);
477 control->bad_channel_bitmap = 0;
478 amdgpu_dpm_send_hbm_bad_channel_flag(adev, control->bad_channel_bitmap);
479 con->update_channel_flag = false;
481 amdgpu_ras_debugfs_set_ret_size(control);
483 mutex_unlock(&control->ras_tbl_mutex);
489 __encode_table_record_to_buf(struct amdgpu_ras_eeprom_control *control,
490 struct eeprom_table_record *record,
496 /* Next are all record fields according to EEPROM page spec in LE foramt */
497 buf[i++] = record->err_type;
499 buf[i++] = record->bank;
501 tmp = cpu_to_le64(record->ts);
502 memcpy(buf + i, &tmp, 8);
505 tmp = cpu_to_le64((record->offset & 0xffffffffffff));
506 memcpy(buf + i, &tmp, 6);
509 buf[i++] = record->mem_channel;
510 buf[i++] = record->mcumc_id;
512 tmp = cpu_to_le64((record->retired_page & 0xffffffffffff));
513 memcpy(buf + i, &tmp, 6);
517 __decode_table_record_from_buf(struct amdgpu_ras_eeprom_control *control,
518 struct eeprom_table_record *record,
524 /* Next are all record fields according to EEPROM page spec in LE foramt */
525 record->err_type = buf[i++];
527 record->bank = buf[i++];
529 memcpy(&tmp, buf + i, 8);
530 record->ts = le64_to_cpu(tmp);
533 memcpy(&tmp, buf + i, 6);
534 record->offset = (le64_to_cpu(tmp) & 0xffffffffffff);
537 record->mem_channel = buf[i++];
538 record->mcumc_id = buf[i++];
540 memcpy(&tmp, buf + i, 6);
541 record->retired_page = (le64_to_cpu(tmp) & 0xffffffffffff);
544 bool amdgpu_ras_eeprom_check_err_threshold(struct amdgpu_device *adev)
546 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
548 if (!__is_ras_eeprom_supported(adev) ||
549 !amdgpu_bad_page_threshold)
552 /* skip check eeprom table for VEGA20 Gaming */
556 if (!(con->features & BIT(AMDGPU_RAS_BLOCK__UMC)))
559 if (con->eeprom_control.tbl_hdr.header == RAS_TABLE_HDR_BAD) {
560 if (amdgpu_bad_page_threshold == -1) {
561 dev_warn(adev->dev, "RAS records:%d exceed threshold:%d",
562 con->eeprom_control.ras_num_recs, con->bad_page_cnt_threshold);
564 "But GPU can be operated due to bad_page_threshold = -1.\n");
567 dev_warn(adev->dev, "This GPU is in BAD status.");
568 dev_warn(adev->dev, "Please retire it or set a larger "
569 "threshold value when reloading driver.\n");
578 * __amdgpu_ras_eeprom_write -- write indexed from buffer to EEPROM
579 * @control: pointer to control structure
580 * @buf: pointer to buffer containing data to write
581 * @fri: start writing at this index
582 * @num: number of records to write
584 * The caller must hold the table mutex in @control.
585 * Return 0 on success, -errno otherwise.
587 static int __amdgpu_ras_eeprom_write(struct amdgpu_ras_eeprom_control *control,
588 u8 *buf, const u32 fri, const u32 num)
590 struct amdgpu_device *adev = to_amdgpu_device(control);
594 /* i2c may be unstable in gpu reset */
595 down_read(&adev->reset_domain->sem);
596 buf_size = num * RAS_TABLE_RECORD_SIZE;
597 res = amdgpu_eeprom_write(adev->pm.ras_eeprom_i2c_bus,
598 control->i2c_address +
599 RAS_INDEX_TO_OFFSET(control, fri),
601 up_read(&adev->reset_domain->sem);
603 DRM_ERROR("Writing %d EEPROM table records error:%d",
605 } else if (res < buf_size) {
606 /* Short write, return error.
608 DRM_ERROR("Wrote %d records out of %d",
609 res / RAS_TABLE_RECORD_SIZE, num);
619 amdgpu_ras_eeprom_append_table(struct amdgpu_ras_eeprom_control *control,
620 struct eeprom_table_record *record,
623 struct amdgpu_ras *con = amdgpu_ras_get_context(to_amdgpu_device(control));
628 buf = kcalloc(num, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
632 /* Encode all of them in one go.
635 for (i = 0; i < num; i++, pp += RAS_TABLE_RECORD_SIZE) {
636 __encode_table_record_to_buf(control, &record[i], pp);
638 /* update bad channel bitmap */
639 if ((record[i].mem_channel < BITS_PER_TYPE(control->bad_channel_bitmap)) &&
640 !(control->bad_channel_bitmap & (1 << record[i].mem_channel))) {
641 control->bad_channel_bitmap |= 1 << record[i].mem_channel;
642 con->update_channel_flag = true;
646 /* a, first record index to write into.
647 * b, last record index to write into.
648 * a = first index to read (fri) + number of records in the table,
650 * Let N = control->ras_max_num_record_count, then we have,
651 * case 0: 0 <= a <= b < N,
652 * just append @num records starting at a;
653 * case 1: 0 <= a < N <= b,
654 * append (N - a) records starting at a, and
655 * append the remainder, b % N + 1, starting at 0.
656 * case 2: 0 <= fri < N <= a <= b, then modulo N we get two subcases,
657 * case 2a: 0 <= a <= b < N
658 * append num records starting at a; and fix fri if b overwrote it,
659 * and since a <= b, if b overwrote it then a must've also,
660 * and if b didn't overwrite it, then a didn't also.
661 * case 2b: 0 <= b < a < N
662 * write num records starting at a, which wraps around 0=N
663 * and overwrite fri unconditionally. Now from case 2a,
664 * this means that b eclipsed fri to overwrite it and wrap
665 * around 0 again, i.e. b = 2N+r pre modulo N, so we unconditionally
666 * set fri = b + 1 (mod N).
667 * Now, since fri is updated in every case, except the trivial case 0,
668 * the number of records present in the table after writing, is,
669 * num_recs - 1 = b - fri (mod N), and we take the positive value,
670 * by adding an arbitrary multiple of N before taking the modulo N
673 a = control->ras_fri + control->ras_num_recs;
675 if (b < control->ras_max_record_count) {
676 res = __amdgpu_ras_eeprom_write(control, buf, a, num);
677 } else if (a < control->ras_max_record_count) {
680 g0 = control->ras_max_record_count - a;
681 g1 = b % control->ras_max_record_count + 1;
682 res = __amdgpu_ras_eeprom_write(control, buf, a, g0);
685 res = __amdgpu_ras_eeprom_write(control,
686 buf + g0 * RAS_TABLE_RECORD_SIZE,
690 if (g1 > control->ras_fri)
691 control->ras_fri = g1 % control->ras_max_record_count;
693 a %= control->ras_max_record_count;
694 b %= control->ras_max_record_count;
697 /* Note that, b - a + 1 = num. */
698 res = __amdgpu_ras_eeprom_write(control, buf, a, num);
701 if (b >= control->ras_fri)
702 control->ras_fri = (b + 1) % control->ras_max_record_count;
706 /* b < a, which means, we write from
707 * a to the end of the table, and from
708 * the start of the table to b.
710 g0 = control->ras_max_record_count - a;
712 res = __amdgpu_ras_eeprom_write(control, buf, a, g0);
715 res = __amdgpu_ras_eeprom_write(control,
716 buf + g0 * RAS_TABLE_RECORD_SIZE,
720 control->ras_fri = g1 % control->ras_max_record_count;
723 control->ras_num_recs = 1 + (control->ras_max_record_count + b
725 % control->ras_max_record_count;
732 amdgpu_ras_eeprom_update_header(struct amdgpu_ras_eeprom_control *control)
734 struct amdgpu_device *adev = to_amdgpu_device(control);
735 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
740 /* Modify the header if it exceeds.
742 if (amdgpu_bad_page_threshold != 0 &&
743 control->ras_num_recs >= ras->bad_page_cnt_threshold) {
745 "Saved bad pages %d reaches threshold value %d\n",
746 control->ras_num_recs, ras->bad_page_cnt_threshold);
747 control->tbl_hdr.header = RAS_TABLE_HDR_BAD;
748 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1) {
749 control->tbl_rai.rma_status = GPU_RETIRED__ECC_REACH_THRESHOLD;
750 control->tbl_rai.health_percent = 0;
753 if (amdgpu_bad_page_threshold != -1)
756 /* ignore the -ENOTSUPP return value */
757 amdgpu_dpm_send_rma_reason(adev);
760 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
761 control->tbl_hdr.tbl_size = RAS_TABLE_HEADER_SIZE +
762 RAS_TABLE_V2_1_INFO_SIZE +
763 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
765 control->tbl_hdr.tbl_size = RAS_TABLE_HEADER_SIZE +
766 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
767 control->tbl_hdr.checksum = 0;
769 buf_size = control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
770 buf = kcalloc(control->ras_num_recs, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
772 DRM_ERROR("allocating memory for table of size %d bytes failed\n",
773 control->tbl_hdr.tbl_size);
778 down_read(&adev->reset_domain->sem);
779 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
780 control->i2c_address +
781 control->ras_record_offset,
783 up_read(&adev->reset_domain->sem);
785 DRM_ERROR("EEPROM failed reading records:%d\n",
788 } else if (res < buf_size) {
789 DRM_ERROR("EEPROM read %d out of %d bytes\n",
796 * bad page records have been stored in eeprom,
797 * now calculate gpu health percent
799 if (amdgpu_bad_page_threshold != 0 &&
800 control->tbl_hdr.version == RAS_TABLE_VER_V2_1 &&
801 control->ras_num_recs < ras->bad_page_cnt_threshold)
802 control->tbl_rai.health_percent = ((ras->bad_page_cnt_threshold -
803 control->ras_num_recs) * 100) /
804 ras->bad_page_cnt_threshold;
806 /* Recalc the checksum.
809 for (pp = buf; pp < buf + buf_size; pp++)
812 csum += __calc_hdr_byte_sum(control);
813 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
814 csum += __calc_ras_info_byte_sum(control);
815 /* avoid sign extension when assigning to "checksum" */
817 control->tbl_hdr.checksum = csum;
818 res = __write_table_header(control);
819 if (!res && control->tbl_hdr.version > RAS_TABLE_VER_V1)
820 res = __write_table_ras_info(control);
827 * amdgpu_ras_eeprom_append -- append records to the EEPROM RAS table
828 * @control: pointer to control structure
829 * @record: array of records to append
830 * @num: number of records in @record array
832 * Append @num records to the table, calculate the checksum and write
833 * the table back to EEPROM. The maximum number of records that
834 * can be appended is between 1 and control->ras_max_record_count,
835 * regardless of how many records are already stored in the table.
837 * Return 0 on success or if EEPROM is not supported, -errno on error.
839 int amdgpu_ras_eeprom_append(struct amdgpu_ras_eeprom_control *control,
840 struct eeprom_table_record *record,
843 struct amdgpu_device *adev = to_amdgpu_device(control);
846 if (!__is_ras_eeprom_supported(adev))
850 DRM_ERROR("will not append 0 records\n");
852 } else if (num > control->ras_max_record_count) {
853 DRM_ERROR("cannot append %d records than the size of table %d\n",
854 num, control->ras_max_record_count);
858 mutex_lock(&control->ras_tbl_mutex);
860 res = amdgpu_ras_eeprom_append_table(control, record, num);
862 res = amdgpu_ras_eeprom_update_header(control);
864 amdgpu_ras_debugfs_set_ret_size(control);
866 mutex_unlock(&control->ras_tbl_mutex);
871 * __amdgpu_ras_eeprom_read -- read indexed from EEPROM into buffer
872 * @control: pointer to control structure
873 * @buf: pointer to buffer to read into
874 * @fri: first record index, start reading at this index, absolute index
875 * @num: number of records to read
877 * The caller must hold the table mutex in @control.
878 * Return 0 on success, -errno otherwise.
880 static int __amdgpu_ras_eeprom_read(struct amdgpu_ras_eeprom_control *control,
881 u8 *buf, const u32 fri, const u32 num)
883 struct amdgpu_device *adev = to_amdgpu_device(control);
887 /* i2c may be unstable in gpu reset */
888 down_read(&adev->reset_domain->sem);
889 buf_size = num * RAS_TABLE_RECORD_SIZE;
890 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
891 control->i2c_address +
892 RAS_INDEX_TO_OFFSET(control, fri),
894 up_read(&adev->reset_domain->sem);
896 DRM_ERROR("Reading %d EEPROM table records error:%d",
898 } else if (res < buf_size) {
899 /* Short read, return error.
901 DRM_ERROR("Read %d records out of %d",
902 res / RAS_TABLE_RECORD_SIZE, num);
912 * amdgpu_ras_eeprom_read -- read EEPROM
913 * @control: pointer to control structure
914 * @record: array of records to read into
915 * @num: number of records in @record
917 * Reads num records from the RAS table in EEPROM and
918 * writes the data into @record array.
920 * Returns 0 on success, -errno on error.
922 int amdgpu_ras_eeprom_read(struct amdgpu_ras_eeprom_control *control,
923 struct eeprom_table_record *record,
926 struct amdgpu_device *adev = to_amdgpu_device(control);
927 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
932 if (!__is_ras_eeprom_supported(adev))
936 DRM_ERROR("will not read 0 records\n");
938 } else if (num > control->ras_num_recs) {
939 DRM_ERROR("too many records to read:%d available:%d\n",
940 num, control->ras_num_recs);
944 buf = kcalloc(num, RAS_TABLE_RECORD_SIZE, GFP_KERNEL);
948 /* Determine how many records to read, from the first record
949 * index, fri, to the end of the table, and from the beginning
950 * of the table, such that the total number of records is
951 * @num, and we handle wrap around when fri > 0 and
952 * fri + num > RAS_MAX_RECORD_COUNT.
954 * First we compute the index of the last element
955 * which would be fetched from each region,
956 * g0 is in [fri, fri + num - 1], and
957 * g1 is in [0, RAS_MAX_RECORD_COUNT - 1].
958 * Then, if g0 < RAS_MAX_RECORD_COUNT, the index of
959 * the last element to fetch, we set g0 to _the number_
960 * of elements to fetch, @num, since we know that the last
961 * indexed to be fetched does not exceed the table.
963 * If, however, g0 >= RAS_MAX_RECORD_COUNT, then
964 * we set g0 to the number of elements to read
965 * until the end of the table, and g1 to the number of
966 * elements to read from the beginning of the table.
968 g0 = control->ras_fri + num - 1;
969 g1 = g0 % control->ras_max_record_count;
970 if (g0 < control->ras_max_record_count) {
974 g0 = control->ras_max_record_count - control->ras_fri;
978 mutex_lock(&control->ras_tbl_mutex);
979 res = __amdgpu_ras_eeprom_read(control, buf, control->ras_fri, g0);
983 res = __amdgpu_ras_eeprom_read(control,
984 buf + g0 * RAS_TABLE_RECORD_SIZE,
992 /* Read up everything? Then transform.
995 for (i = 0; i < num; i++, pp += RAS_TABLE_RECORD_SIZE) {
996 __decode_table_record_from_buf(control, &record[i], pp);
998 /* update bad channel bitmap */
999 if ((record[i].mem_channel < BITS_PER_TYPE(control->bad_channel_bitmap)) &&
1000 !(control->bad_channel_bitmap & (1 << record[i].mem_channel))) {
1001 control->bad_channel_bitmap |= 1 << record[i].mem_channel;
1002 con->update_channel_flag = true;
1007 mutex_unlock(&control->ras_tbl_mutex);
1012 uint32_t amdgpu_ras_eeprom_max_record_count(struct amdgpu_ras_eeprom_control *control)
1014 /* get available eeprom table version first before eeprom table init */
1015 amdgpu_ras_set_eeprom_table_version(control);
1017 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
1018 return RAS_MAX_RECORD_COUNT_V2_1;
1020 return RAS_MAX_RECORD_COUNT;
1024 amdgpu_ras_debugfs_eeprom_size_read(struct file *f, char __user *buf,
1025 size_t size, loff_t *pos)
1027 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1028 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1029 struct amdgpu_ras_eeprom_control *control = ras ? &ras->eeprom_control : NULL;
1036 if (!ras || !control) {
1037 res = snprintf(data, sizeof(data), "Not supported\n");
1039 res = snprintf(data, sizeof(data), "%d bytes or %d records\n",
1040 RAS_TBL_SIZE_BYTES, control->ras_max_record_count);
1047 res = min_t(size_t, res, size);
1049 if (copy_to_user(buf, &data[*pos], res))
1057 const struct file_operations amdgpu_ras_debugfs_eeprom_size_ops = {
1058 .owner = THIS_MODULE,
1059 .read = amdgpu_ras_debugfs_eeprom_size_read,
1061 .llseek = default_llseek,
1064 static const char *tbl_hdr_str = " Signature Version FirstOffs Size Checksum\n";
1065 static const char *tbl_hdr_fmt = "0x%08X 0x%08X 0x%08X 0x%08X 0x%08X\n";
1066 #define tbl_hdr_fmt_size (5 * (2+8) + 4 + 1)
1067 static const char *rec_hdr_str = "Index Offset ErrType Bank/CU TimeStamp Offs/Addr MemChl MCUMCID RetiredPage\n";
1068 static const char *rec_hdr_fmt = "%5d 0x%05X %7s 0x%02X 0x%016llX 0x%012llX 0x%02X 0x%02X 0x%012llX\n";
1069 #define rec_hdr_fmt_size (5 + 1 + 7 + 1 + 7 + 1 + 7 + 1 + 18 + 1 + 14 + 1 + 6 + 1 + 7 + 1 + 14 + 1)
1071 static const char *record_err_type_str[AMDGPU_RAS_EEPROM_ERR_COUNT] = {
1077 static loff_t amdgpu_ras_debugfs_table_size(struct amdgpu_ras_eeprom_control *control)
1079 return strlen(tbl_hdr_str) + tbl_hdr_fmt_size +
1080 strlen(rec_hdr_str) + rec_hdr_fmt_size * control->ras_num_recs;
1083 void amdgpu_ras_debugfs_set_ret_size(struct amdgpu_ras_eeprom_control *control)
1085 struct amdgpu_ras *ras = container_of(control, struct amdgpu_ras,
1087 struct dentry *de = ras->de_ras_eeprom_table;
1090 d_inode(de)->i_size = amdgpu_ras_debugfs_table_size(control);
1093 static ssize_t amdgpu_ras_debugfs_table_read(struct file *f, char __user *buf,
1094 size_t size, loff_t *pos)
1096 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1097 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1098 struct amdgpu_ras_eeprom_control *control = &ras->eeprom_control;
1099 const size_t orig_size = size;
1103 mutex_lock(&control->ras_tbl_mutex);
1105 /* We want *pos - data_len > 0, which means there's
1106 * bytes to be printed from data.
1108 data_len = strlen(tbl_hdr_str);
1109 if (*pos < data_len) {
1111 data_len = min_t(size_t, data_len, size);
1112 if (copy_to_user(buf, &tbl_hdr_str[*pos], data_len))
1119 data_len = strlen(tbl_hdr_str) + tbl_hdr_fmt_size;
1120 if (*pos < data_len && size > 0) {
1121 u8 data[tbl_hdr_fmt_size + 1];
1124 snprintf(data, sizeof(data), tbl_hdr_fmt,
1125 control->tbl_hdr.header,
1126 control->tbl_hdr.version,
1127 control->tbl_hdr.first_rec_offset,
1128 control->tbl_hdr.tbl_size,
1129 control->tbl_hdr.checksum);
1132 data_len = min_t(size_t, data_len, size);
1133 lpos = *pos - strlen(tbl_hdr_str);
1134 if (copy_to_user(buf, &data[lpos], data_len))
1141 data_len = strlen(tbl_hdr_str) + tbl_hdr_fmt_size + strlen(rec_hdr_str);
1142 if (*pos < data_len && size > 0) {
1146 data_len = min_t(size_t, data_len, size);
1147 lpos = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size;
1148 if (copy_to_user(buf, &rec_hdr_str[lpos], data_len))
1155 data_len = amdgpu_ras_debugfs_table_size(control);
1156 if (*pos < data_len && size > 0) {
1157 u8 dare[RAS_TABLE_RECORD_SIZE];
1158 u8 data[rec_hdr_fmt_size + 1];
1159 struct eeprom_table_record record;
1162 /* Find the starting record index
1164 s = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size -
1165 strlen(rec_hdr_str);
1166 s = s / rec_hdr_fmt_size;
1167 r = *pos - strlen(tbl_hdr_str) - tbl_hdr_fmt_size -
1168 strlen(rec_hdr_str);
1169 r = r % rec_hdr_fmt_size;
1171 for ( ; size > 0 && s < control->ras_num_recs; s++) {
1172 u32 ai = RAS_RI_TO_AI(control, s);
1173 /* Read a single record
1175 res = __amdgpu_ras_eeprom_read(control, dare, ai, 1);
1178 __decode_table_record_from_buf(control, &record, dare);
1179 snprintf(data, sizeof(data), rec_hdr_fmt,
1181 RAS_INDEX_TO_OFFSET(control, ai),
1182 record_err_type_str[record.err_type],
1188 record.retired_page);
1190 data_len = min_t(size_t, rec_hdr_fmt_size - r, size);
1191 if (copy_to_user(buf, &data[r], data_len)) {
1203 mutex_unlock(&control->ras_tbl_mutex);
1204 return res < 0 ? res : orig_size - size;
1208 amdgpu_ras_debugfs_eeprom_table_read(struct file *f, char __user *buf,
1209 size_t size, loff_t *pos)
1211 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
1212 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1213 struct amdgpu_ras_eeprom_control *control = ras ? &ras->eeprom_control : NULL;
1220 if (!ras || !control) {
1221 res = snprintf(data, sizeof(data), "Not supported\n");
1226 res = min_t(size_t, res, size);
1228 if (copy_to_user(buf, &data[*pos], res))
1235 return amdgpu_ras_debugfs_table_read(f, buf, size, pos);
1239 const struct file_operations amdgpu_ras_debugfs_eeprom_table_ops = {
1240 .owner = THIS_MODULE,
1241 .read = amdgpu_ras_debugfs_eeprom_table_read,
1243 .llseek = default_llseek,
1247 * __verify_ras_table_checksum -- verify the RAS EEPROM table checksum
1248 * @control: pointer to control structure
1250 * Check the checksum of the stored in EEPROM RAS table.
1252 * Return 0 if the checksum is correct,
1253 * positive if it is not correct, and
1254 * -errno on I/O error.
1256 static int __verify_ras_table_checksum(struct amdgpu_ras_eeprom_control *control)
1258 struct amdgpu_device *adev = to_amdgpu_device(control);
1262 if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
1263 buf_size = RAS_TABLE_HEADER_SIZE +
1264 RAS_TABLE_V2_1_INFO_SIZE +
1265 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
1267 buf_size = RAS_TABLE_HEADER_SIZE +
1268 control->ras_num_recs * RAS_TABLE_RECORD_SIZE;
1270 buf = kzalloc(buf_size, GFP_KERNEL);
1272 DRM_ERROR("Out of memory checking RAS table checksum.\n");
1276 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1277 control->i2c_address +
1278 control->ras_header_offset,
1280 if (res < buf_size) {
1281 DRM_ERROR("Partial read for checksum, res:%d\n", res);
1282 /* On partial reads, return -EIO.
1290 for (pp = buf; pp < buf + buf_size; pp++)
1294 return res < 0 ? res : csum;
1297 static int __read_table_ras_info(struct amdgpu_ras_eeprom_control *control)
1299 struct amdgpu_ras_eeprom_table_ras_info *rai = &control->tbl_rai;
1300 struct amdgpu_device *adev = to_amdgpu_device(control);
1304 buf = kzalloc(RAS_TABLE_V2_1_INFO_SIZE, GFP_KERNEL);
1306 DRM_ERROR("Failed to alloc buf to read EEPROM table ras info\n");
1311 * EEPROM table V2_1 supports ras info,
1312 * read EEPROM table ras info
1314 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1315 control->i2c_address + control->ras_info_offset,
1316 buf, RAS_TABLE_V2_1_INFO_SIZE);
1317 if (res < RAS_TABLE_V2_1_INFO_SIZE) {
1318 DRM_ERROR("Failed to read EEPROM table ras info, res:%d", res);
1319 res = res >= 0 ? -EIO : res;
1323 __decode_table_ras_info_from_buf(rai, buf);
1327 return res == RAS_TABLE_V2_1_INFO_SIZE ? 0 : res;
1330 int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control)
1332 struct amdgpu_device *adev = to_amdgpu_device(control);
1333 unsigned char buf[RAS_TABLE_HEADER_SIZE] = { 0 };
1334 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr;
1335 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
1338 ras->is_rma = false;
1340 if (!__is_ras_eeprom_supported(adev))
1343 /* Verify i2c adapter is initialized */
1344 if (!adev->pm.ras_eeprom_i2c_bus || !adev->pm.ras_eeprom_i2c_bus->algo)
1347 if (!__get_eeprom_i2c_addr(adev, control))
1350 control->ras_header_offset = RAS_HDR_START;
1351 control->ras_info_offset = RAS_TABLE_V2_1_INFO_START;
1352 mutex_init(&control->ras_tbl_mutex);
1354 /* Read the table header from EEPROM address */
1355 res = amdgpu_eeprom_read(adev->pm.ras_eeprom_i2c_bus,
1356 control->i2c_address + control->ras_header_offset,
1357 buf, RAS_TABLE_HEADER_SIZE);
1358 if (res < RAS_TABLE_HEADER_SIZE) {
1359 DRM_ERROR("Failed to read EEPROM table header, res:%d", res);
1360 return res >= 0 ? -EIO : res;
1363 __decode_table_header_from_buf(hdr, buf);
1365 if (hdr->version == RAS_TABLE_VER_V2_1) {
1366 control->ras_num_recs = RAS_NUM_RECS_V2_1(hdr);
1367 control->ras_record_offset = RAS_RECORD_START_V2_1;
1368 control->ras_max_record_count = RAS_MAX_RECORD_COUNT_V2_1;
1370 control->ras_num_recs = RAS_NUM_RECS(hdr);
1371 control->ras_record_offset = RAS_RECORD_START;
1372 control->ras_max_record_count = RAS_MAX_RECORD_COUNT;
1374 control->ras_fri = RAS_OFFSET_TO_INDEX(control, hdr->first_rec_offset);
1376 if (hdr->header == RAS_TABLE_HDR_VAL) {
1377 DRM_DEBUG_DRIVER("Found existing EEPROM table with %d records",
1378 control->ras_num_recs);
1380 if (hdr->version == RAS_TABLE_VER_V2_1) {
1381 res = __read_table_ras_info(control);
1386 res = __verify_ras_table_checksum(control);
1388 DRM_ERROR("RAS table incorrect checksum or error:%d\n",
1391 /* Warn if we are at 90% of the threshold or above
1393 if (10 * control->ras_num_recs >= 9 * ras->bad_page_cnt_threshold)
1394 dev_warn(adev->dev, "RAS records:%u exceeds 90%% of threshold:%d",
1395 control->ras_num_recs,
1396 ras->bad_page_cnt_threshold);
1397 } else if (hdr->header == RAS_TABLE_HDR_BAD &&
1398 amdgpu_bad_page_threshold != 0) {
1399 if (hdr->version == RAS_TABLE_VER_V2_1) {
1400 res = __read_table_ras_info(control);
1405 res = __verify_ras_table_checksum(control);
1407 DRM_ERROR("RAS Table incorrect checksum or error:%d\n",
1409 if (ras->bad_page_cnt_threshold > control->ras_num_recs) {
1410 /* This means that, the threshold was increased since
1411 * the last time the system was booted, and now,
1412 * ras->bad_page_cnt_threshold - control->num_recs > 0,
1413 * so that at least one more record can be saved,
1414 * before the page count threshold is reached.
1417 "records:%d threshold:%d, resetting "
1418 "RAS table header signature",
1419 control->ras_num_recs,
1420 ras->bad_page_cnt_threshold);
1421 res = amdgpu_ras_eeprom_correct_header_tag(control,
1424 dev_err(adev->dev, "RAS records:%d exceed threshold:%d",
1425 control->ras_num_recs, ras->bad_page_cnt_threshold);
1426 if (amdgpu_bad_page_threshold == -1) {
1427 dev_warn(adev->dev, "GPU will be initialized due to bad_page_threshold = -1.");
1432 "RAS records:%d exceed threshold:%d, "
1433 "GPU will not be initialized. Replace this GPU or increase the threshold",
1434 control->ras_num_recs, ras->bad_page_cnt_threshold);
1438 DRM_INFO("Creating a new EEPROM table");
1440 res = amdgpu_ras_eeprom_reset_table(control);
1443 return res < 0 ? res : 0;