/* * Copyright 2018 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * */ #include #include #include #include #include "amdgpu.h" #include "amdgpu_ras.h" #include "amdgpu_atomfirmware.h" const char *ras_error_string[] = { "none", "parity", "single_correctable", "multi_uncorrectable", "poison", }; const char *ras_block_string[] = { "umc", "sdma", "gfx", "mmhub", "athub", "pcie_bif", "hdp", "xgmi_wafl", "df", "smn", "sem", "mp0", "mp1", "fuse", }; #define ras_err_str(i) (ras_error_string[ffs(i)]) #define ras_block_str(i) (ras_block_string[i]) #define AMDGPU_RAS_FLAG_INIT_BY_VBIOS 1 #define AMDGPU_RAS_FLAG_INIT_NEED_RESET 2 #define RAS_DEFAULT_FLAGS (AMDGPU_RAS_FLAG_INIT_BY_VBIOS) /* inject address is 52 bits */ #define RAS_UMC_INJECT_ADDR_LIMIT (0x1ULL << 52) static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { struct ras_manager *obj = (struct ras_manager *)file_inode(f)->i_private; struct ras_query_if info = { .head = obj->head, }; ssize_t s; char val[128]; if (amdgpu_ras_error_query(obj->adev, &info)) return -EINVAL; s = snprintf(val, sizeof(val), "%s: %lu\n%s: %lu\n", "ue", info.ue_count, "ce", info.ce_count); if (*pos >= s) return 0; s -= *pos; s = min_t(u64, s, size); if (copy_to_user(buf, &val[*pos], s)) return -EINVAL; *pos += s; return s; } static const struct file_operations amdgpu_ras_debugfs_ops = { .owner = THIS_MODULE, .read = amdgpu_ras_debugfs_read, .write = NULL, .llseek = default_llseek }; static int amdgpu_ras_find_block_id_by_name(const char *name, int *block_id) { int i; for (i = 0; i < ARRAY_SIZE(ras_block_string); i++) { *block_id = i; if (strcmp(name, ras_block_str(i)) == 0) return 0; } return -EINVAL; } static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f, const char __user *buf, size_t size, loff_t *pos, struct ras_debug_if *data) { ssize_t s = min_t(u64, 64, size); char str[65]; char block_name[33]; char err[9] = "ue"; int op = -1; int block_id; uint32_t sub_block; u64 address, value; if (*pos) return -EINVAL; *pos = size; memset(str, 0, sizeof(str)); memset(data, 0, sizeof(*data)); if (copy_from_user(str, buf, s)) return -EINVAL; if (sscanf(str, "disable %32s", block_name) == 1) op = 0; else if (sscanf(str, "enable %32s %8s", block_name, err) == 2) op = 1; else if (sscanf(str, "inject %32s %8s", block_name, err) == 2) op = 2; else if (str[0] && str[1] && str[2] && str[3]) /* ascii string, but commands are not matched. */ return -EINVAL; if (op != -1) { if (amdgpu_ras_find_block_id_by_name(block_name, &block_id)) return -EINVAL; data->head.block = block_id; /* only ue and ce errors are supported */ if (!memcmp("ue", err, 2)) data->head.type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE; else if (!memcmp("ce", err, 2)) data->head.type = AMDGPU_RAS_ERROR__SINGLE_CORRECTABLE; else return -EINVAL; data->op = op; if (op == 2) { if (sscanf(str, "%*s %*s %*s %u %llu %llu", &sub_block, &address, &value) != 3) if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx", &sub_block, &address, &value) != 3) return -EINVAL; data->head.sub_block_index = sub_block; data->inject.address = address; data->inject.value = value; } } else { if (size < sizeof(*data)) return -EINVAL; if (copy_from_user(data, buf, sizeof(*data))) return -EINVAL; } return 0; } /** * DOC: AMDGPU RAS debugfs control interface * * It accepts struct ras_debug_if who has two members. * * First member: ras_debug_if::head or ras_debug_if::inject. * * head is used to indicate which IP block will be under control. * * head has four members, they are block, type, sub_block_index, name. * block: which IP will be under control. * type: what kind of error will be enabled/disabled/injected. * sub_block_index: some IPs have subcomponets. say, GFX, sDMA. * name: the name of IP. * * inject has two more members than head, they are address, value. * As their names indicate, inject operation will write the * value to the address. * * Second member: struct ras_debug_if::op. * It has three kinds of operations. * 0: disable RAS on the block. Take ::head as its data. * 1: enable RAS on the block. Take ::head as its data. * 2: inject errors on the block. Take ::inject as its data. * * How to use the interface? * programs: * copy the struct ras_debug_if in your codes and initialize it. * write the struct to the control node. * * bash: * echo op block [error [sub_blcok address value]] > .../ras/ras_ctrl * op: disable, enable, inject * disable: only block is needed * enable: block and error are needed * inject: error, address, value are needed * block: umc, smda, gfx, ......... * see ras_block_string[] for details * error: ue, ce * ue: multi_uncorrectable * ce: single_correctable * sub_block: sub block index, pass 0 if there is no sub block * * here are some examples for bash commands, * echo inject umc ue 0x0 0x0 0x0 > /sys/kernel/debug/dri/0/ras/ras_ctrl * echo inject umc ce 0 0 0 > /sys/kernel/debug/dri/0/ras/ras_ctrl * echo disable umc > /sys/kernel/debug/dri/0/ras/ras_ctrl * * How to check the result? * * For disable/enable, please check ras features at * /sys/class/drm/card[0/1/2...]/device/ras/features * * For inject, please check corresponding err count at * /sys/class/drm/card[0/1/2...]/device/ras/[gfx/sdma/...]_err_count * * NOTE: operation is only allowed on blocks which are supported. * Please check ras mask at /sys/module/amdgpu/parameters/ras_mask */ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user *buf, size_t size, loff_t *pos) { struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private; struct ras_debug_if data; int ret = 0; ret = amdgpu_ras_debugfs_ctrl_parse_data(f, buf, size, pos, &data); if (ret) return -EINVAL; if (!amdgpu_ras_is_supported(adev, data.head.block)) return -EINVAL; switch (data.op) { case 0: ret = amdgpu_ras_feature_enable(adev, &data.head, 0); break; case 1: ret = amdgpu_ras_feature_enable(adev, &data.head, 1); break; case 2: if ((data.inject.address >= adev->gmc.mc_vram_size) || (data.inject.address >= RAS_UMC_INJECT_ADDR_LIMIT)) { ret = -EINVAL; break; } /* data.inject.address is offset instead of absolute gpu address */ ret = amdgpu_ras_error_inject(adev, &data.inject); break; default: ret = -EINVAL; break; }; if (ret) return -EINVAL; return size; } static const struct file_operations amdgpu_ras_debugfs_ctrl_ops = { .owner = THIS_MODULE, .read = NULL, .write = amdgpu_ras_debugfs_ctrl_write, .llseek = default_llseek }; static ssize_t amdgpu_ras_sysfs_read(struct device *dev, struct device_attribute *attr, char *buf) { struct ras_manager *obj = container_of(attr, struct ras_manager, sysfs_attr); struct ras_query_if info = { .head = obj->head, }; if (amdgpu_ras_error_query(obj->adev, &info)) return -EINVAL; return snprintf(buf, PAGE_SIZE, "%s: %lu\n%s: %lu\n", "ue", info.ue_count, "ce", info.ce_count); } /* obj begin */ #define get_obj(obj) do { (obj)->use++; } while (0) #define alive_obj(obj) ((obj)->use) static inline void put_obj(struct ras_manager *obj) { if (obj && --obj->use == 0) list_del(&obj->node); if (obj && obj->use < 0) { DRM_ERROR("RAS ERROR: Unbalance obj(%s) use\n", obj->head.name); } } /* make one obj and return it. */ static struct ras_manager *amdgpu_ras_create_obj(struct amdgpu_device *adev, struct ras_common_if *head) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj; if (!con) return NULL; if (head->block >= AMDGPU_RAS_BLOCK_COUNT) return NULL; obj = &con->objs[head->block]; /* already exist. return obj? */ if (alive_obj(obj)) return NULL; obj->head = *head; obj->adev = adev; list_add(&obj->node, &con->head); get_obj(obj); return obj; } /* return an obj equal to head, or the first when head is NULL */ static struct ras_manager *amdgpu_ras_find_obj(struct amdgpu_device *adev, struct ras_common_if *head) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj; int i; if (!con) return NULL; if (head) { if (head->block >= AMDGPU_RAS_BLOCK_COUNT) return NULL; obj = &con->objs[head->block]; if (alive_obj(obj)) { WARN_ON(head->block != obj->head.block); return obj; } } else { for (i = 0; i < AMDGPU_RAS_BLOCK_COUNT; i++) { obj = &con->objs[i]; if (alive_obj(obj)) { WARN_ON(i != obj->head.block); return obj; } } } return NULL; } /* obj end */ /* feature ctl begin */ static int amdgpu_ras_is_feature_allowed(struct amdgpu_device *adev, struct ras_common_if *head) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); return con->hw_supported & BIT(head->block); } static int amdgpu_ras_is_feature_enabled(struct amdgpu_device *adev, struct ras_common_if *head) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); return con->features & BIT(head->block); } /* * if obj is not created, then create one. * set feature enable flag. */ static int __amdgpu_ras_feature_enable(struct amdgpu_device *adev, struct ras_common_if *head, int enable) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj = amdgpu_ras_find_obj(adev, head); /* If hardware does not support ras, then do not create obj. * But if hardware support ras, we can create the obj. * Ras framework checks con->hw_supported to see if it need do * corresponding initialization. * IP checks con->support to see if it need disable ras. */ if (!amdgpu_ras_is_feature_allowed(adev, head)) return 0; if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head))) return 0; if (enable) { if (!obj) { obj = amdgpu_ras_create_obj(adev, head); if (!obj) return -EINVAL; } else { /* In case we create obj somewhere else */ get_obj(obj); } con->features |= BIT(head->block); } else { if (obj && amdgpu_ras_is_feature_enabled(adev, head)) { con->features &= ~BIT(head->block); put_obj(obj); } } return 0; } /* wrapper of psp_ras_enable_features */ int amdgpu_ras_feature_enable(struct amdgpu_device *adev, struct ras_common_if *head, bool enable) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); union ta_ras_cmd_input info; int ret; if (!con) return -EINVAL; if (!enable) { info.disable_features = (struct ta_ras_disable_features_input) { .block_id = amdgpu_ras_block_to_ta(head->block), .error_type = amdgpu_ras_error_to_ta(head->type), }; } else { info.enable_features = (struct ta_ras_enable_features_input) { .block_id = amdgpu_ras_block_to_ta(head->block), .error_type = amdgpu_ras_error_to_ta(head->type), }; } /* Do not enable if it is not allowed. */ WARN_ON(enable && !amdgpu_ras_is_feature_allowed(adev, head)); /* Are we alerady in that state we are going to set? */ if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head))) return 0; ret = psp_ras_enable_features(&adev->psp, &info, enable); if (ret) { DRM_ERROR("RAS ERROR: %s %s feature failed ret %d\n", enable ? "enable":"disable", ras_block_str(head->block), ret); if (ret == TA_RAS_STATUS__RESET_NEEDED) return -EAGAIN; return -EINVAL; } /* setup the obj */ __amdgpu_ras_feature_enable(adev, head, enable); return 0; } /* Only used in device probe stage and called only once. */ int amdgpu_ras_feature_enable_on_boot(struct amdgpu_device *adev, struct ras_common_if *head, bool enable) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); int ret; if (!con) return -EINVAL; if (con->flags & AMDGPU_RAS_FLAG_INIT_BY_VBIOS) { if (enable) { /* There is no harm to issue a ras TA cmd regardless of * the currecnt ras state. * If current state == target state, it will do nothing * But sometimes it requests driver to reset and repost * with error code -EAGAIN. */ ret = amdgpu_ras_feature_enable(adev, head, 1); /* With old ras TA, we might fail to enable ras. * Log it and just setup the object. * TODO need remove this WA in the future. */ if (ret == -EINVAL) { ret = __amdgpu_ras_feature_enable(adev, head, 1); if (!ret) DRM_INFO("RAS INFO: %s setup object\n", ras_block_str(head->block)); } } else { /* setup the object then issue a ras TA disable cmd.*/ ret = __amdgpu_ras_feature_enable(adev, head, 1); if (ret) return ret; ret = amdgpu_ras_feature_enable(adev, head, 0); } } else ret = amdgpu_ras_feature_enable(adev, head, enable); return ret; } static int amdgpu_ras_disable_all_features(struct amdgpu_device *adev, bool bypass) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj, *tmp; list_for_each_entry_safe(obj, tmp, &con->head, node) { /* bypass psp. * aka just release the obj and corresponding flags */ if (bypass) { if (__amdgpu_ras_feature_enable(adev, &obj->head, 0)) break; } else { if (amdgpu_ras_feature_enable(adev, &obj->head, 0)) break; } } return con->features; } static int amdgpu_ras_enable_all_features(struct amdgpu_device *adev, bool bypass) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); int ras_block_count = AMDGPU_RAS_BLOCK_COUNT; int i; const enum amdgpu_ras_error_type default_ras_type = AMDGPU_RAS_ERROR__NONE; for (i = 0; i < ras_block_count; i++) { struct ras_common_if head = { .block = i, .type = default_ras_type, .sub_block_index = 0, }; strcpy(head.name, ras_block_str(i)); if (bypass) { /* * bypass psp. vbios enable ras for us. * so just create the obj */ if (__amdgpu_ras_feature_enable(adev, &head, 1)) break; } else { if (amdgpu_ras_feature_enable(adev, &head, 1)) break; } } return con->features; } /* feature ctl end */ /* query/inject/cure begin */ int amdgpu_ras_error_query(struct amdgpu_device *adev, struct ras_query_if *info) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head); struct ras_err_data err_data = {0, 0, 0, NULL}; if (!obj) return -EINVAL; switch (info->head.block) { case AMDGPU_RAS_BLOCK__UMC: if (adev->umc.funcs->query_ras_error_count) adev->umc.funcs->query_ras_error_count(adev, &err_data); /* umc query_ras_error_address is also responsible for clearing * error status */ if (adev->umc.funcs->query_ras_error_address) adev->umc.funcs->query_ras_error_address(adev, &err_data); break; case AMDGPU_RAS_BLOCK__GFX: if (adev->gfx.funcs->query_ras_error_count) adev->gfx.funcs->query_ras_error_count(adev, &err_data); break; case AMDGPU_RAS_BLOCK__MMHUB: if (adev->mmhub_funcs->query_ras_error_count) adev->mmhub_funcs->query_ras_error_count(adev, &err_data); break; default: break; } obj->err_data.ue_count += err_data.ue_count; obj->err_data.ce_count += err_data.ce_count; info->ue_count = obj->err_data.ue_count; info->ce_count = obj->err_data.ce_count; if (err_data.ce_count) dev_info(adev->dev, "%ld correctable errors detected in %s block\n", obj->err_data.ce_count, ras_block_str(info->head.block)); if (err_data.ue_count) dev_info(adev->dev, "%ld uncorrectable errors detected in %s block\n", obj->err_data.ue_count, ras_block_str(info->head.block)); return 0; } /* wrapper of psp_ras_trigger_error */ int amdgpu_ras_error_inject(struct amdgpu_device *adev, struct ras_inject_if *info) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head); struct ta_ras_trigger_error_input block_info = { .block_id = amdgpu_ras_block_to_ta(info->head.block), .inject_error_type = amdgpu_ras_error_to_ta(info->head.type), .sub_block_index = info->head.sub_block_index, .address = info->address, .value = info->value, }; int ret = 0; if (!obj) return -EINVAL; switch (info->head.block) { case AMDGPU_RAS_BLOCK__GFX: if (adev->gfx.funcs->ras_error_inject) ret = adev->gfx.funcs->ras_error_inject(adev, info); else ret = -EINVAL; break; case AMDGPU_RAS_BLOCK__UMC: case AMDGPU_RAS_BLOCK__MMHUB: ret = psp_ras_trigger_error(&adev->psp, &block_info); break; default: DRM_INFO("%s error injection is not supported yet\n", ras_block_str(info->head.block)); ret = -EINVAL; } if (ret) DRM_ERROR("RAS ERROR: inject %s error failed ret %d\n", ras_block_str(info->head.block), ret); return ret; } int amdgpu_ras_error_cure(struct amdgpu_device *adev, struct ras_cure_if *info) { /* psp fw has no cure interface for now. */ return 0; } /* get the total error counts on all IPs */ unsigned long amdgpu_ras_query_error_count(struct amdgpu_device *adev, bool is_ce) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj; struct ras_err_data data = {0, 0}; if (!con) return 0; list_for_each_entry(obj, &con->head, node) { struct ras_query_if info = { .head = obj->head, }; if (amdgpu_ras_error_query(adev, &info)) return 0; data.ce_count += info.ce_count; data.ue_count += info.ue_count; } return is_ce ? data.ce_count : data.ue_count; } /* query/inject/cure end */ /* sysfs begin */ static int amdgpu_ras_badpages_read(struct amdgpu_device *adev, struct ras_badpage **bps, unsigned int *count); static char *amdgpu_ras_badpage_flags_str(unsigned int flags) { switch (flags) { case 0: return "R"; case 1: return "P"; case 2: default: return "F"; }; } /* * DOC: ras sysfs gpu_vram_bad_pages interface * * It allows user to read the bad pages of vram on the gpu through * /sys/class/drm/card[0/1/2...]/device/ras/gpu_vram_bad_pages * * It outputs multiple lines, and each line stands for one gpu page. * * The format of one line is below, * gpu pfn : gpu page size : flags * * gpu pfn and gpu page size are printed in hex format. * flags can be one of below character, * R: reserved, this gpu page is reserved and not able to use. * P: pending for reserve, this gpu page is marked as bad, will be reserved * in next window of page_reserve. * F: unable to reserve. this gpu page can't be reserved due to some reasons. * * examples: * 0x00000001 : 0x00001000 : R * 0x00000002 : 0x00001000 : P */ static ssize_t amdgpu_ras_sysfs_badpages_read(struct file *f, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t ppos, size_t count) { struct amdgpu_ras *con = container_of(attr, struct amdgpu_ras, badpages_attr); struct amdgpu_device *adev = con->adev; const unsigned int element_size = sizeof("0xabcdabcd : 0x12345678 : R\n") - 1; unsigned int start = div64_ul(ppos + element_size - 1, element_size); unsigned int end = div64_ul(ppos + count - 1, element_size); ssize_t s = 0; struct ras_badpage *bps = NULL; unsigned int bps_count = 0; memset(buf, 0, count); if (amdgpu_ras_badpages_read(adev, &bps, &bps_count)) return 0; for (; start < end && start < bps_count; start++) s += scnprintf(&buf[s], element_size + 1, "0x%08x : 0x%08x : %1s\n", bps[start].bp, bps[start].size, amdgpu_ras_badpage_flags_str(bps[start].flags)); kfree(bps); return s; } static ssize_t amdgpu_ras_sysfs_features_read(struct device *dev, struct device_attribute *attr, char *buf) { struct amdgpu_ras *con = container_of(attr, struct amdgpu_ras, features_attr); return scnprintf(buf, PAGE_SIZE, "feature mask: 0x%x\n", con->features); } static int amdgpu_ras_sysfs_create_feature_node(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct attribute *attrs[] = { &con->features_attr.attr, NULL }; struct bin_attribute *bin_attrs[] = { &con->badpages_attr, NULL }; struct attribute_group group = { .name = "ras", .attrs = attrs, .bin_attrs = bin_attrs, }; con->features_attr = (struct device_attribute) { .attr = { .name = "features", .mode = S_IRUGO, }, .show = amdgpu_ras_sysfs_features_read, }; con->badpages_attr = (struct bin_attribute) { .attr = { .name = "gpu_vram_bad_pages", .mode = S_IRUGO, }, .size = 0, .private = NULL, .read = amdgpu_ras_sysfs_badpages_read, }; sysfs_attr_init(attrs[0]); sysfs_bin_attr_init(bin_attrs[0]); return sysfs_create_group(&adev->dev->kobj, &group); } static int amdgpu_ras_sysfs_remove_feature_node(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct attribute *attrs[] = { &con->features_attr.attr, NULL }; struct bin_attribute *bin_attrs[] = { &con->badpages_attr, NULL }; struct attribute_group group = { .name = "ras", .attrs = attrs, .bin_attrs = bin_attrs, }; sysfs_remove_group(&adev->dev->kobj, &group); return 0; } int amdgpu_ras_sysfs_create(struct amdgpu_device *adev, struct ras_fs_if *head) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head); if (!obj || obj->attr_inuse) return -EINVAL; get_obj(obj); memcpy(obj->fs_data.sysfs_name, head->sysfs_name, sizeof(obj->fs_data.sysfs_name)); obj->sysfs_attr = (struct device_attribute){ .attr = { .name = obj->fs_data.sysfs_name, .mode = S_IRUGO, }, .show = amdgpu_ras_sysfs_read, }; sysfs_attr_init(&obj->sysfs_attr.attr); if (sysfs_add_file_to_group(&adev->dev->kobj, &obj->sysfs_attr.attr, "ras")) { put_obj(obj); return -EINVAL; } obj->attr_inuse = 1; return 0; } int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev, struct ras_common_if *head) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, head); if (!obj || !obj->attr_inuse) return -EINVAL; sysfs_remove_file_from_group(&adev->dev->kobj, &obj->sysfs_attr.attr, "ras"); obj->attr_inuse = 0; put_obj(obj); return 0; } static int amdgpu_ras_sysfs_remove_all(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj, *tmp; list_for_each_entry_safe(obj, tmp, &con->head, node) { amdgpu_ras_sysfs_remove(adev, &obj->head); } amdgpu_ras_sysfs_remove_feature_node(adev); return 0; } /* sysfs end */ /* debugfs begin */ static void amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct drm_minor *minor = adev->ddev->primary; con->dir = debugfs_create_dir("ras", minor->debugfs_root); con->ent = debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, con->dir, adev, &amdgpu_ras_debugfs_ctrl_ops); } void amdgpu_ras_debugfs_create(struct amdgpu_device *adev, struct ras_fs_if *head) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head); if (!obj || obj->ent) return; get_obj(obj); memcpy(obj->fs_data.debugfs_name, head->debugfs_name, sizeof(obj->fs_data.debugfs_name)); obj->ent = debugfs_create_file(obj->fs_data.debugfs_name, S_IWUGO | S_IRUGO, con->dir, obj, &amdgpu_ras_debugfs_ops); } void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev, struct ras_common_if *head) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, head); if (!obj || !obj->ent) return; debugfs_remove(obj->ent); obj->ent = NULL; put_obj(obj); } static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj, *tmp; list_for_each_entry_safe(obj, tmp, &con->head, node) { amdgpu_ras_debugfs_remove(adev, &obj->head); } debugfs_remove(con->ent); debugfs_remove(con->dir); con->dir = NULL; con->ent = NULL; } /* debugfs end */ /* ras fs */ static int amdgpu_ras_fs_init(struct amdgpu_device *adev) { amdgpu_ras_sysfs_create_feature_node(adev); amdgpu_ras_debugfs_create_ctrl_node(adev); return 0; } static int amdgpu_ras_fs_fini(struct amdgpu_device *adev) { amdgpu_ras_debugfs_remove_all(adev); amdgpu_ras_sysfs_remove_all(adev); return 0; } /* ras fs end */ /* ih begin */ static void amdgpu_ras_interrupt_handler(struct ras_manager *obj) { struct ras_ih_data *data = &obj->ih_data; struct amdgpu_iv_entry entry; int ret; struct ras_err_data err_data = {0, 0, 0, NULL}; while (data->rptr != data->wptr) { rmb(); memcpy(&entry, &data->ring[data->rptr], data->element_size); wmb(); data->rptr = (data->aligned_element_size + data->rptr) % data->ring_size; /* Let IP handle its data, maybe we need get the output * from the callback to udpate the error type/count, etc */ if (data->cb) { ret = data->cb(obj->adev, &err_data, &entry); /* ue will trigger an interrupt, and in that case * we need do a reset to recovery the whole system. * But leave IP do that recovery, here we just dispatch * the error. */ if (ret == AMDGPU_RAS_SUCCESS) { /* these counts could be left as 0 if * some blocks do not count error number */ obj->err_data.ue_count += err_data.ue_count; obj->err_data.ce_count += err_data.ce_count; } } } } static void amdgpu_ras_interrupt_process_handler(struct work_struct *work) { struct ras_ih_data *data = container_of(work, struct ras_ih_data, ih_work); struct ras_manager *obj = container_of(data, struct ras_manager, ih_data); amdgpu_ras_interrupt_handler(obj); } int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev, struct ras_dispatch_if *info) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head); struct ras_ih_data *data = &obj->ih_data; if (!obj) return -EINVAL; if (data->inuse == 0) return 0; /* Might be overflow... */ memcpy(&data->ring[data->wptr], info->entry, data->element_size); wmb(); data->wptr = (data->aligned_element_size + data->wptr) % data->ring_size; schedule_work(&data->ih_work); return 0; } int amdgpu_ras_interrupt_remove_handler(struct amdgpu_device *adev, struct ras_ih_if *info) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head); struct ras_ih_data *data; if (!obj) return -EINVAL; data = &obj->ih_data; if (data->inuse == 0) return 0; cancel_work_sync(&data->ih_work); kfree(data->ring); memset(data, 0, sizeof(*data)); put_obj(obj); return 0; } int amdgpu_ras_interrupt_add_handler(struct amdgpu_device *adev, struct ras_ih_if *info) { struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head); struct ras_ih_data *data; if (!obj) { /* in case we registe the IH before enable ras feature */ obj = amdgpu_ras_create_obj(adev, &info->head); if (!obj) return -EINVAL; } else get_obj(obj); data = &obj->ih_data; /* add the callback.etc */ *data = (struct ras_ih_data) { .inuse = 0, .cb = info->cb, .element_size = sizeof(struct amdgpu_iv_entry), .rptr = 0, .wptr = 0, }; INIT_WORK(&data->ih_work, amdgpu_ras_interrupt_process_handler); data->aligned_element_size = ALIGN(data->element_size, 8); /* the ring can store 64 iv entries. */ data->ring_size = 64 * data->aligned_element_size; data->ring = kmalloc(data->ring_size, GFP_KERNEL); if (!data->ring) { put_obj(obj); return -ENOMEM; } /* IH is ready */ data->inuse = 1; return 0; } static int amdgpu_ras_interrupt_remove_all(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj, *tmp; list_for_each_entry_safe(obj, tmp, &con->head, node) { struct ras_ih_if info = { .head = obj->head, }; amdgpu_ras_interrupt_remove_handler(adev, &info); } return 0; } /* ih end */ /* recovery begin */ /* return 0 on success. * caller need free bps. */ static int amdgpu_ras_badpages_read(struct amdgpu_device *adev, struct ras_badpage **bps, unsigned int *count) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_err_handler_data *data; int i = 0; int ret = 0; if (!con || !con->eh_data || !bps || !count) return -EINVAL; mutex_lock(&con->recovery_lock); data = con->eh_data; if (!data || data->count == 0) { *bps = NULL; goto out; } *bps = kmalloc(sizeof(struct ras_badpage) * data->count, GFP_KERNEL); if (!*bps) { ret = -ENOMEM; goto out; } for (; i < data->count; i++) { (*bps)[i] = (struct ras_badpage){ .bp = data->bps[i].bp, .size = AMDGPU_GPU_PAGE_SIZE, .flags = 0, }; if (data->last_reserved <= i) (*bps)[i].flags = 1; else if (data->bps[i].bo == NULL) (*bps)[i].flags = 2; } *count = data->count; out: mutex_unlock(&con->recovery_lock); return ret; } static void amdgpu_ras_do_recovery(struct work_struct *work) { struct amdgpu_ras *ras = container_of(work, struct amdgpu_ras, recovery_work); amdgpu_device_gpu_recover(ras->adev, 0); atomic_set(&ras->in_recovery, 0); } /* alloc/realloc bps array */ static int amdgpu_ras_realloc_eh_data_space(struct amdgpu_device *adev, struct ras_err_handler_data *data, int pages) { unsigned int old_space = data->count + data->space_left; unsigned int new_space = old_space + pages; unsigned int align_space = ALIGN(new_space, 1024); void *tmp = kmalloc(align_space * sizeof(*data->bps), GFP_KERNEL); if (!tmp) return -ENOMEM; if (data->bps) { memcpy(tmp, data->bps, data->count * sizeof(*data->bps)); kfree(data->bps); } data->bps = tmp; data->space_left += align_space - old_space; return 0; } /* it deal with vram only. */ int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev, unsigned long *bps, int pages) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_err_handler_data *data; int i = pages; int ret = 0; if (!con || !con->eh_data || !bps || pages <= 0) return 0; mutex_lock(&con->recovery_lock); data = con->eh_data; if (!data) goto out; if (data->space_left <= pages) if (amdgpu_ras_realloc_eh_data_space(adev, data, pages)) { ret = -ENOMEM; goto out; } while (i--) data->bps[data->count++].bp = bps[i]; data->space_left -= pages; out: mutex_unlock(&con->recovery_lock); return ret; } /* called in gpu recovery/init */ int amdgpu_ras_reserve_bad_pages(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_err_handler_data *data; uint64_t bp; struct amdgpu_bo *bo = NULL; int i; if (!con || !con->eh_data) return 0; mutex_lock(&con->recovery_lock); data = con->eh_data; if (!data) goto out; /* reserve vram at driver post stage. */ for (i = data->last_reserved; i < data->count; i++) { bp = data->bps[i].bp; if (amdgpu_bo_create_kernel_at(adev, bp << PAGE_SHIFT, PAGE_SIZE, AMDGPU_GEM_DOMAIN_VRAM, &bo, NULL)) DRM_ERROR("RAS ERROR: reserve vram %llx fail\n", bp); data->bps[i].bo = bo; data->last_reserved = i + 1; bo = NULL; } out: mutex_unlock(&con->recovery_lock); return 0; } /* called when driver unload */ static int amdgpu_ras_release_bad_pages(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_err_handler_data *data; struct amdgpu_bo *bo; int i; if (!con || !con->eh_data) return 0; mutex_lock(&con->recovery_lock); data = con->eh_data; if (!data) goto out; for (i = data->last_reserved - 1; i >= 0; i--) { bo = data->bps[i].bo; amdgpu_bo_free_kernel(&bo, NULL, NULL); data->bps[i].bo = bo; data->last_reserved = i; } out: mutex_unlock(&con->recovery_lock); return 0; } static int amdgpu_ras_save_bad_pages(struct amdgpu_device *adev) { /* TODO * write the array to eeprom when SMU disabled. */ return 0; } static int amdgpu_ras_load_bad_pages(struct amdgpu_device *adev) { /* TODO * read the array to eeprom when SMU disabled. */ return 0; } static int amdgpu_ras_recovery_init(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_err_handler_data **data = &con->eh_data; *data = kmalloc(sizeof(**data), GFP_KERNEL|__GFP_ZERO); if (!*data) return -ENOMEM; mutex_init(&con->recovery_lock); INIT_WORK(&con->recovery_work, amdgpu_ras_do_recovery); atomic_set(&con->in_recovery, 0); con->adev = adev; amdgpu_ras_load_bad_pages(adev); amdgpu_ras_reserve_bad_pages(adev); return 0; } static int amdgpu_ras_recovery_fini(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_err_handler_data *data = con->eh_data; cancel_work_sync(&con->recovery_work); amdgpu_ras_save_bad_pages(adev); amdgpu_ras_release_bad_pages(adev); mutex_lock(&con->recovery_lock); con->eh_data = NULL; kfree(data->bps); kfree(data); mutex_unlock(&con->recovery_lock); return 0; } /* recovery end */ /* return 0 if ras will reset gpu and repost.*/ int amdgpu_ras_request_reset_on_boot(struct amdgpu_device *adev, unsigned int block) { struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); if (!ras) return -EINVAL; ras->flags |= AMDGPU_RAS_FLAG_INIT_NEED_RESET; return 0; } /* * check hardware's ras ability which will be saved in hw_supported. * if hardware does not support ras, we can skip some ras initializtion and * forbid some ras operations from IP. * if software itself, say boot parameter, limit the ras ability. We still * need allow IP do some limited operations, like disable. In such case, * we have to initialize ras as normal. but need check if operation is * allowed or not in each function. */ static void amdgpu_ras_check_supported(struct amdgpu_device *adev, uint32_t *hw_supported, uint32_t *supported) { *hw_supported = 0; *supported = 0; if (amdgpu_sriov_vf(adev) || adev->asic_type != CHIP_VEGA20) return; if (adev->is_atom_fw && (amdgpu_atomfirmware_mem_ecc_supported(adev) || amdgpu_atomfirmware_sram_ecc_supported(adev))) *hw_supported = AMDGPU_RAS_BLOCK_MASK; *supported = amdgpu_ras_enable == 0 ? 0 : *hw_supported & amdgpu_ras_mask; } int amdgpu_ras_init(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); if (con) return 0; con = kmalloc(sizeof(struct amdgpu_ras) + sizeof(struct ras_manager) * AMDGPU_RAS_BLOCK_COUNT, GFP_KERNEL|__GFP_ZERO); if (!con) return -ENOMEM; con->objs = (struct ras_manager *)(con + 1); amdgpu_ras_set_context(adev, con); amdgpu_ras_check_supported(adev, &con->hw_supported, &con->supported); if (!con->hw_supported) { amdgpu_ras_set_context(adev, NULL); kfree(con); return 0; } con->features = 0; INIT_LIST_HEAD(&con->head); /* Might need get this flag from vbios. */ con->flags = RAS_DEFAULT_FLAGS; if (amdgpu_ras_recovery_init(adev)) goto recovery_out; amdgpu_ras_mask &= AMDGPU_RAS_BLOCK_MASK; if (amdgpu_ras_fs_init(adev)) goto fs_out; /* ras init for each ras block */ if (adev->umc.funcs->ras_init) adev->umc.funcs->ras_init(adev); DRM_INFO("RAS INFO: ras initialized successfully, " "hardware ability[%x] ras_mask[%x]\n", con->hw_supported, con->supported); return 0; fs_out: amdgpu_ras_recovery_fini(adev); recovery_out: amdgpu_ras_set_context(adev, NULL); kfree(con); return -EINVAL; } /* do some init work after IP late init as dependence. * and it runs in resume/gpu reset/booting up cases. */ void amdgpu_ras_resume(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); struct ras_manager *obj, *tmp; if (!con) return; if (con->flags & AMDGPU_RAS_FLAG_INIT_BY_VBIOS) { /* Set up all other IPs which are not implemented. There is a * tricky thing that IP's actual ras error type should be * MULTI_UNCORRECTABLE, but as driver does not handle it, so * ERROR_NONE make sense anyway. */ amdgpu_ras_enable_all_features(adev, 1); /* We enable ras on all hw_supported block, but as boot * parameter might disable some of them and one or more IP has * not implemented yet. So we disable them on behalf. */ list_for_each_entry_safe(obj, tmp, &con->head, node) { if (!amdgpu_ras_is_supported(adev, obj->head.block)) { amdgpu_ras_feature_enable(adev, &obj->head, 0); /* there should be no any reference. */ WARN_ON(alive_obj(obj)); } } } if (con->flags & AMDGPU_RAS_FLAG_INIT_NEED_RESET) { con->flags &= ~AMDGPU_RAS_FLAG_INIT_NEED_RESET; /* setup ras obj state as disabled. * for init_by_vbios case. * if we want to enable ras, just enable it in a normal way. * If we want do disable it, need setup ras obj as enabled, * then issue another TA disable cmd. * See feature_enable_on_boot */ amdgpu_ras_disable_all_features(adev, 1); amdgpu_ras_reset_gpu(adev, 0); } } void amdgpu_ras_suspend(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); if (!con) return; amdgpu_ras_disable_all_features(adev, 0); /* Make sure all ras objects are disabled. */ if (con->features) amdgpu_ras_disable_all_features(adev, 1); } /* do some fini work before IP fini as dependence */ int amdgpu_ras_pre_fini(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); if (!con) return 0; /* Need disable ras on all IPs here before ip [hw/sw]fini */ amdgpu_ras_disable_all_features(adev, 0); amdgpu_ras_recovery_fini(adev); return 0; } int amdgpu_ras_fini(struct amdgpu_device *adev) { struct amdgpu_ras *con = amdgpu_ras_get_context(adev); if (!con) return 0; amdgpu_ras_fs_fini(adev); amdgpu_ras_interrupt_remove_all(adev); WARN(con->features, "Feature mask is not cleared"); if (con->features) amdgpu_ras_disable_all_features(adev, 1); amdgpu_ras_set_context(adev, NULL); kfree(con); return 0; }