diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 3334 |
1 files changed, 3334 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c new file mode 100644 index 000000000..6f6341f70 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c @@ -0,0 +1,3334 @@ +/* + * 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 <linux/debugfs.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/uaccess.h> +#include <linux/reboot.h> +#include <linux/syscalls.h> +#include <linux/pm_runtime.h> + +#include "amdgpu.h" +#include "amdgpu_ras.h" +#include "amdgpu_atomfirmware.h" +#include "amdgpu_xgmi.h" +#include "ivsrcid/nbio/irqsrcs_nbif_7_4.h" +#include "nbio_v4_3.h" +#include "nbio_v7_9.h" +#include "atom.h" +#include "amdgpu_reset.h" + +#ifdef CONFIG_X86_MCE_AMD +#include <asm/mce.h> + +static bool notifier_registered; +#endif +static const char *RAS_FS_NAME = "ras"; + +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", + "mca", + "vcn", + "jpeg", +}; + +const char *ras_mca_block_string[] = { + "mca_mp0", + "mca_mp1", + "mca_mpio", + "mca_iohc", +}; + +struct amdgpu_ras_block_list { + /* ras block link */ + struct list_head node; + + struct amdgpu_ras_block_object *ras_obj; +}; + +const char *get_ras_block_str(struct ras_common_if *ras_block) +{ + if (!ras_block) + return "NULL"; + + if (ras_block->block >= AMDGPU_RAS_BLOCK_COUNT) + return "OUT OF RANGE"; + + if (ras_block->block == AMDGPU_RAS_BLOCK__MCA) + return ras_mca_block_string[ras_block->sub_block_index]; + + return ras_block_string[ras_block->block]; +} + +#define ras_block_str(_BLOCK_) \ + (((_BLOCK_) < ARRAY_SIZE(ras_block_string)) ? ras_block_string[_BLOCK_] : "Out Of Range") + +#define ras_err_str(i) (ras_error_string[ffs(i)]) + +#define RAS_DEFAULT_FLAGS (AMDGPU_RAS_FLAG_INIT_BY_VBIOS) + +/* inject address is 52 bits */ +#define RAS_UMC_INJECT_ADDR_LIMIT (0x1ULL << 52) + +/* typical ECC bad page rate is 1 bad page per 100MB VRAM */ +#define RAS_BAD_PAGE_COVER (100 * 1024 * 1024ULL) + +enum amdgpu_ras_retire_page_reservation { + AMDGPU_RAS_RETIRE_PAGE_RESERVED, + AMDGPU_RAS_RETIRE_PAGE_PENDING, + AMDGPU_RAS_RETIRE_PAGE_FAULT, +}; + +atomic_t amdgpu_ras_in_intr = ATOMIC_INIT(0); + +static bool amdgpu_ras_check_bad_page_unlock(struct amdgpu_ras *con, + uint64_t addr); +static bool amdgpu_ras_check_bad_page(struct amdgpu_device *adev, + uint64_t addr); +#ifdef CONFIG_X86_MCE_AMD +static void amdgpu_register_bad_pages_mca_notifier(struct amdgpu_device *adev); +struct mce_notifier_adev_list { + struct amdgpu_device *devs[MAX_GPU_INSTANCE]; + int num_gpu; +}; +static struct mce_notifier_adev_list mce_adev_list; +#endif + +void amdgpu_ras_set_error_query_ready(struct amdgpu_device *adev, bool ready) +{ + if (adev && amdgpu_ras_get_context(adev)) + amdgpu_ras_get_context(adev)->error_query_ready = ready; +} + +static bool amdgpu_ras_get_error_query_ready(struct amdgpu_device *adev) +{ + if (adev && amdgpu_ras_get_context(adev)) + return amdgpu_ras_get_context(adev)->error_query_ready; + + return false; +} + +static int amdgpu_reserve_page_direct(struct amdgpu_device *adev, uint64_t address) +{ + struct ras_err_data err_data = {0, 0, 0, NULL}; + struct eeprom_table_record err_rec; + + if ((address >= adev->gmc.mc_vram_size) || + (address >= RAS_UMC_INJECT_ADDR_LIMIT)) { + dev_warn(adev->dev, + "RAS WARN: input address 0x%llx is invalid.\n", + address); + return -EINVAL; + } + + if (amdgpu_ras_check_bad_page(adev, address)) { + dev_warn(adev->dev, + "RAS WARN: 0x%llx has already been marked as bad page!\n", + address); + return 0; + } + + memset(&err_rec, 0x0, sizeof(struct eeprom_table_record)); + err_data.err_addr = &err_rec; + amdgpu_umc_fill_error_record(&err_data, address, address, 0, 0); + + if (amdgpu_bad_page_threshold != 0) { + amdgpu_ras_add_bad_pages(adev, err_data.err_addr, + err_data.err_addr_cnt); + amdgpu_ras_save_bad_pages(adev, NULL); + } + + dev_warn(adev->dev, "WARNING: THIS IS ONLY FOR TEST PURPOSES AND WILL CORRUPT RAS EEPROM\n"); + dev_warn(adev->dev, "Clear EEPROM:\n"); + dev_warn(adev->dev, " echo 1 > /sys/kernel/debug/dri/0/ras/ras_eeprom_reset\n"); + + return 0; +} + +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_query_error_status(obj->adev, &info)) + return -EINVAL; + + /* Hardware counter will be reset automatically after the query on Vega20 and Arcturus */ + if (obj->adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 2) && + obj->adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 4)) { + if (amdgpu_ras_reset_error_status(obj->adev, info.head.block)) + dev_warn(obj->adev->dev, "Failed to reset error counter and error status"); + } + + 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_string[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; + /* default value is 0 if the mask is not set by user */ + u32 instance_mask = 0; + + 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 (strstr(str, "retire_page") != NULL) + op = 3; + else if (str[0] && str[1] && str[2] && str[3]) + /* ascii string, but commands are not matched. */ + return -EINVAL; + + if (op != -1) { + if (op == 3) { + if (sscanf(str, "%*s 0x%llx", &address) != 1 && + sscanf(str, "%*s %llu", &address) != 1) + return -EINVAL; + + data->op = op; + data->inject.address = address; + + return 0; + } + + 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 0x%x 0x%llx 0x%llx 0x%x", + &sub_block, &address, &value, &instance_mask) != 4 && + sscanf(str, "%*s %*s %*s %u %llu %llu %u", + &sub_block, &address, &value, &instance_mask) != 4 && + sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx", + &sub_block, &address, &value) != 3 && + sscanf(str, "%*s %*s %*s %u %llu %llu", + &sub_block, &address, &value) != 3) + return -EINVAL; + data->head.sub_block_index = sub_block; + data->inject.address = address; + data->inject.value = value; + data->inject.instance_mask = instance_mask; + } + } else { + if (size < sizeof(*data)) + return -EINVAL; + + if (copy_from_user(data, buf, sizeof(*data))) + return -EINVAL; + } + + return 0; +} + +static void amdgpu_ras_instance_mask_check(struct amdgpu_device *adev, + struct ras_debug_if *data) +{ + int num_xcc = adev->gfx.xcc_mask ? NUM_XCC(adev->gfx.xcc_mask) : 1; + uint32_t mask, inst_mask = data->inject.instance_mask; + + /* no need to set instance mask if there is only one instance */ + if (num_xcc <= 1 && inst_mask) { + data->inject.instance_mask = 0; + dev_dbg(adev->dev, + "RAS inject mask(0x%x) isn't supported and force it to 0.\n", + inst_mask); + + return; + } + + switch (data->head.block) { + case AMDGPU_RAS_BLOCK__GFX: + mask = GENMASK(num_xcc - 1, 0); + break; + case AMDGPU_RAS_BLOCK__SDMA: + mask = GENMASK(adev->sdma.num_instances - 1, 0); + break; + case AMDGPU_RAS_BLOCK__VCN: + case AMDGPU_RAS_BLOCK__JPEG: + mask = GENMASK(adev->vcn.num_vcn_inst - 1, 0); + break; + default: + mask = inst_mask; + break; + } + + /* remove invalid bits in instance mask */ + data->inject.instance_mask &= mask; + if (inst_mask != data->inject.instance_mask) + dev_dbg(adev->dev, + "Adjust RAS inject mask 0x%x to 0x%x\n", + inst_mask, data->inject.instance_mask); +} + +/** + * DOC: AMDGPU RAS debugfs control interface + * + * The control interface accepts struct ras_debug_if which 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 three more members than head, they are address, value and mask. + * As their names indicate, inject operation will write the + * value to the address. + * + * The 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? + * + * In a program + * + * Copy the struct ras_debug_if in your code and initialize it. + * Write the struct to the control interface. + * + * From shell + * + * .. code-block:: bash + * + * echo "disable <block>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl + * echo "enable <block> <error>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl + * echo "inject <block> <error> <sub-block> <address> <value> <mask>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl + * + * Where N, is the card which you want to affect. + * + * "disable" requires only the block. + * "enable" requires the block and error type. + * "inject" requires the block, error type, address, and value. + * + * The block is one of: umc, sdma, gfx, etc. + * see ras_block_string[] for details + * + * The error type is one of: ue, ce, where, + * ue is multi-uncorrectable + * ce is single-correctable + * + * The sub-block is a the sub-block index, pass 0 if there is no sub-block. + * The address and value are hexadecimal numbers, leading 0x is optional. + * The mask means instance mask, is optional, default value is 0x1. + * + * For instance, + * + * .. code-block:: bash + * + * echo inject umc ue 0x0 0x0 0x0 > /sys/kernel/debug/dri/0/ras/ras_ctrl + * echo inject umc ce 0 0 0 3 > /sys/kernel/debug/dri/0/ras/ras_ctrl + * echo disable umc > /sys/kernel/debug/dri/0/ras/ras_ctrl + * + * How to check the result of the operation? + * + * To check disable/enable, see "ras" features at, + * /sys/class/drm/card[0/1/2...]/device/ras/features + * + * To check inject, see the corresponding error count at, + * /sys/class/drm/card[0/1/2...]/device/ras/[gfx|sdma|umc|...]_err_count + * + * .. note:: + * Operations are only allowed on blocks which are supported. + * Check the "ras" mask at /sys/module/amdgpu/parameters/ras_mask + * to see which blocks support RAS on a particular asic. + * + */ +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; + + if (!amdgpu_ras_get_error_query_ready(adev)) { + dev_warn(adev->dev, "RAS WARN: error injection " + "currently inaccessible\n"); + return size; + } + + ret = amdgpu_ras_debugfs_ctrl_parse_data(f, buf, size, pos, &data); + if (ret) + return ret; + + if (data.op == 3) { + ret = amdgpu_reserve_page_direct(adev, data.inject.address); + if (!ret) + return size; + else + return ret; + } + + 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 && + adev->gmc.mc_vram_size) || + (data.inject.address >= RAS_UMC_INJECT_ADDR_LIMIT)) { + dev_warn(adev->dev, "RAS WARN: input address " + "0x%llx is invalid.", + data.inject.address); + ret = -EINVAL; + break; + } + + /* umc ce/ue error injection for a bad page is not allowed */ + if ((data.head.block == AMDGPU_RAS_BLOCK__UMC) && + amdgpu_ras_check_bad_page(adev, data.inject.address)) { + dev_warn(adev->dev, "RAS WARN: inject: 0x%llx has " + "already been marked as bad!\n", + data.inject.address); + break; + } + + amdgpu_ras_instance_mask_check(adev, &data); + + /* 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 ret; + + return size; +} + +/** + * DOC: AMDGPU RAS debugfs EEPROM table reset interface + * + * Some boards contain an EEPROM which is used to persistently store a list of + * bad pages which experiences ECC errors in vram. This interface provides + * a way to reset the EEPROM, e.g., after testing error injection. + * + * Usage: + * + * .. code-block:: bash + * + * echo 1 > ../ras/ras_eeprom_reset + * + * will reset EEPROM table to 0 entries. + * + */ +static ssize_t amdgpu_ras_debugfs_eeprom_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; + int ret; + + ret = amdgpu_ras_eeprom_reset_table( + &(amdgpu_ras_get_context(adev)->eeprom_control)); + + if (!ret) { + /* Something was written to EEPROM. + */ + amdgpu_ras_get_context(adev)->flags = RAS_DEFAULT_FLAGS; + return size; + } else { + return ret; + } +} + +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 const struct file_operations amdgpu_ras_debugfs_eeprom_ops = { + .owner = THIS_MODULE, + .read = NULL, + .write = amdgpu_ras_debugfs_eeprom_write, + .llseek = default_llseek +}; + +/** + * DOC: AMDGPU RAS sysfs Error Count Interface + * + * It allows the user to read the error count for each IP block on the gpu through + * /sys/class/drm/card[0/1/2...]/device/ras/[gfx/sdma/...]_err_count + * + * It outputs the multiple lines which report the uncorrected (ue) and corrected + * (ce) error counts. + * + * The format of one line is below, + * + * [ce|ue]: count + * + * Example: + * + * .. code-block:: bash + * + * ue: 0 + * ce: 1 + * + */ +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_get_error_query_ready(obj->adev)) + return sysfs_emit(buf, "Query currently inaccessible\n"); + + if (amdgpu_ras_query_error_status(obj->adev, &info)) + return -EINVAL; + + if (obj->adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 2) && + obj->adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 4)) { + if (amdgpu_ras_reset_error_status(obj->adev, info.head.block)) + dev_warn(obj->adev->dev, "Failed to reset error counter and error status"); + } + + return sysfs_emit(buf, "%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", get_ras_block_str(&obj->head)); +} + +/* 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 (!adev->ras_enabled || !con) + return NULL; + + if (head->block >= AMDGPU_RAS_BLOCK_COUNT) + return NULL; + + if (head->block == AMDGPU_RAS_BLOCK__MCA) { + if (head->sub_block_index >= AMDGPU_RAS_MCA_BLOCK__LAST) + return NULL; + + obj = &con->objs[AMDGPU_RAS_BLOCK__LAST + head->sub_block_index]; + } else + 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 */ +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 (!adev->ras_enabled || !con) + return NULL; + + if (head) { + if (head->block >= AMDGPU_RAS_BLOCK_COUNT) + return NULL; + + if (head->block == AMDGPU_RAS_BLOCK__MCA) { + if (head->sub_block_index >= AMDGPU_RAS_MCA_BLOCK__LAST) + return NULL; + + obj = &con->objs[AMDGPU_RAS_BLOCK__LAST + head->sub_block_index]; + } else + obj = &con->objs[head->block]; + + if (alive_obj(obj)) + return obj; + } else { + for (i = 0; i < AMDGPU_RAS_BLOCK_COUNT + AMDGPU_RAS_MCA_BLOCK_COUNT; i++) { + obj = &con->objs[i]; + if (alive_obj(obj)) + 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) +{ + return adev->ras_hw_enabled & 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) { + 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; + + /* Do not enable ras feature if it is not allowed */ + if (enable && + head->block != AMDGPU_RAS_BLOCK__GFX && + !amdgpu_ras_is_feature_allowed(adev, head)) + return 0; + + /* Only enable gfx ras feature from host side */ + if (head->block == AMDGPU_RAS_BLOCK__GFX && + !amdgpu_sriov_vf(adev) && + !amdgpu_ras_intr_triggered()) { + info = kzalloc(sizeof(union ta_ras_cmd_input), GFP_KERNEL); + if (!info) + return -ENOMEM; + + 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), + }; + } + + ret = psp_ras_enable_features(&adev->psp, info, enable); + if (ret) { + dev_err(adev->dev, "ras %s %s failed poison:%d ret:%d\n", + enable ? "enable":"disable", + get_ras_block_str(head), + amdgpu_ras_is_poison_mode_supported(adev), ret); + kfree(info); + return ret; + } + + kfree(info); + } + + /* 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) + dev_info(adev->dev, + "RAS INFO: %s setup object\n", + get_ras_block_str(head)); + } + } else { + /* setup the object then issue a ras TA disable cmd.*/ + ret = __amdgpu_ras_feature_enable(adev, head, 1); + if (ret) + return ret; + + /* gfx block ras dsiable cmd must send to ras-ta */ + if (head->block == AMDGPU_RAS_BLOCK__GFX) + con->features |= BIT(head->block); + + ret = amdgpu_ras_feature_enable(adev, head, 0); + + /* clean gfx block ras features flag */ + if (adev->ras_enabled && head->block == AMDGPU_RAS_BLOCK__GFX) + con->features &= ~BIT(head->block); + } + } 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 i; + const enum amdgpu_ras_error_type default_ras_type = AMDGPU_RAS_ERROR__NONE; + + for (i = 0; i < AMDGPU_RAS_BLOCK_COUNT; i++) { + struct ras_common_if head = { + .block = i, + .type = default_ras_type, + .sub_block_index = 0, + }; + + if (i == AMDGPU_RAS_BLOCK__MCA) + continue; + + 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; + } + } + + for (i = 0; i < AMDGPU_RAS_MCA_BLOCK_COUNT; i++) { + struct ras_common_if head = { + .block = AMDGPU_RAS_BLOCK__MCA, + .type = default_ras_type, + .sub_block_index = 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 */ + +static int amdgpu_ras_block_match_default(struct amdgpu_ras_block_object *block_obj, + enum amdgpu_ras_block block) +{ + if (!block_obj) + return -EINVAL; + + if (block_obj->ras_comm.block == block) + return 0; + + return -EINVAL; +} + +static struct amdgpu_ras_block_object *amdgpu_ras_get_ras_block(struct amdgpu_device *adev, + enum amdgpu_ras_block block, uint32_t sub_block_index) +{ + struct amdgpu_ras_block_list *node, *tmp; + struct amdgpu_ras_block_object *obj; + + if (block >= AMDGPU_RAS_BLOCK__LAST) + return NULL; + + list_for_each_entry_safe(node, tmp, &adev->ras_list, node) { + if (!node->ras_obj) { + dev_warn(adev->dev, "Warning: abnormal ras list node.\n"); + continue; + } + + obj = node->ras_obj; + if (obj->ras_block_match) { + if (obj->ras_block_match(obj, block, sub_block_index) == 0) + return obj; + } else { + if (amdgpu_ras_block_match_default(obj, block) == 0) + return obj; + } + } + + return NULL; +} + +static void amdgpu_ras_get_ecc_info(struct amdgpu_device *adev, struct ras_err_data *err_data) +{ + struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); + int ret = 0; + + /* + * choosing right query method according to + * whether smu support query error information + */ + ret = amdgpu_dpm_get_ecc_info(adev, (void *)&(ras->umc_ecc)); + if (ret == -EOPNOTSUPP) { + if (adev->umc.ras && adev->umc.ras->ras_block.hw_ops && + adev->umc.ras->ras_block.hw_ops->query_ras_error_count) + adev->umc.ras->ras_block.hw_ops->query_ras_error_count(adev, err_data); + + /* umc query_ras_error_address is also responsible for clearing + * error status + */ + if (adev->umc.ras && adev->umc.ras->ras_block.hw_ops && + adev->umc.ras->ras_block.hw_ops->query_ras_error_address) + adev->umc.ras->ras_block.hw_ops->query_ras_error_address(adev, err_data); + } else if (!ret) { + if (adev->umc.ras && + adev->umc.ras->ecc_info_query_ras_error_count) + adev->umc.ras->ecc_info_query_ras_error_count(adev, err_data); + + if (adev->umc.ras && + adev->umc.ras->ecc_info_query_ras_error_address) + adev->umc.ras->ecc_info_query_ras_error_address(adev, err_data); + } +} + +/* query/inject/cure begin */ +int amdgpu_ras_query_error_status(struct amdgpu_device *adev, + struct ras_query_if *info) +{ + struct amdgpu_ras_block_object *block_obj = NULL; + 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; + + if (info->head.block == AMDGPU_RAS_BLOCK__UMC) { + amdgpu_ras_get_ecc_info(adev, &err_data); + } else { + block_obj = amdgpu_ras_get_ras_block(adev, info->head.block, 0); + if (!block_obj || !block_obj->hw_ops) { + dev_dbg_once(adev->dev, "%s doesn't config RAS function\n", + get_ras_block_str(&info->head)); + return -EINVAL; + } + + if (block_obj->hw_ops->query_ras_error_count) + block_obj->hw_ops->query_ras_error_count(adev, &err_data); + + if ((info->head.block == AMDGPU_RAS_BLOCK__SDMA) || + (info->head.block == AMDGPU_RAS_BLOCK__GFX) || + (info->head.block == AMDGPU_RAS_BLOCK__MMHUB)) { + if (block_obj->hw_ops->query_ras_error_status) + block_obj->hw_ops->query_ras_error_status(adev); + } + } + + 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) { + if (!adev->aid_mask && + adev->smuio.funcs && + adev->smuio.funcs->get_socket_id && + adev->smuio.funcs->get_die_id) { + dev_info(adev->dev, "socket: %d, die: %d " + "%ld correctable hardware errors " + "detected in %s block, no user " + "action is needed.\n", + adev->smuio.funcs->get_socket_id(adev), + adev->smuio.funcs->get_die_id(adev), + obj->err_data.ce_count, + get_ras_block_str(&info->head)); + } else { + dev_info(adev->dev, "%ld correctable hardware errors " + "detected in %s block, no user " + "action is needed.\n", + obj->err_data.ce_count, + get_ras_block_str(&info->head)); + } + } + if (err_data.ue_count) { + if (!adev->aid_mask && + adev->smuio.funcs && + adev->smuio.funcs->get_socket_id && + adev->smuio.funcs->get_die_id) { + dev_info(adev->dev, "socket: %d, die: %d " + "%ld uncorrectable hardware errors " + "detected in %s block\n", + adev->smuio.funcs->get_socket_id(adev), + adev->smuio.funcs->get_die_id(adev), + obj->err_data.ue_count, + get_ras_block_str(&info->head)); + } else { + dev_info(adev->dev, "%ld uncorrectable hardware errors " + "detected in %s block\n", + obj->err_data.ue_count, + get_ras_block_str(&info->head)); + } + } + + return 0; +} + +int amdgpu_ras_reset_error_status(struct amdgpu_device *adev, + enum amdgpu_ras_block block) +{ + struct amdgpu_ras_block_object *block_obj = amdgpu_ras_get_ras_block(adev, block, 0); + + if (!amdgpu_ras_is_supported(adev, block)) + return -EINVAL; + + if (!block_obj || !block_obj->hw_ops) { + dev_dbg_once(adev->dev, "%s doesn't config RAS function\n", + ras_block_str(block)); + return -EINVAL; + } + + if (block_obj->hw_ops->reset_ras_error_count) + block_obj->hw_ops->reset_ras_error_count(adev); + + if ((block == AMDGPU_RAS_BLOCK__GFX) || + (block == AMDGPU_RAS_BLOCK__MMHUB)) { + if (block_obj->hw_ops->reset_ras_error_status) + block_obj->hw_ops->reset_ras_error_status(adev); + } + + 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 = -EINVAL; + struct amdgpu_ras_block_object *block_obj = amdgpu_ras_get_ras_block(adev, + info->head.block, + info->head.sub_block_index); + + /* inject on guest isn't allowed, return success directly */ + if (amdgpu_sriov_vf(adev)) + return 0; + + if (!obj) + return -EINVAL; + + if (!block_obj || !block_obj->hw_ops) { + dev_dbg_once(adev->dev, "%s doesn't config RAS function\n", + get_ras_block_str(&info->head)); + return -EINVAL; + } + + /* Calculate XGMI relative offset */ + if (adev->gmc.xgmi.num_physical_nodes > 1 && + info->head.block != AMDGPU_RAS_BLOCK__GFX) { + block_info.address = + amdgpu_xgmi_get_relative_phy_addr(adev, + block_info.address); + } + + if (block_obj->hw_ops->ras_error_inject) { + if (info->head.block == AMDGPU_RAS_BLOCK__GFX) + ret = block_obj->hw_ops->ras_error_inject(adev, info, info->instance_mask); + else /* Special ras_error_inject is defined (e.g: xgmi) */ + ret = block_obj->hw_ops->ras_error_inject(adev, &block_info, + info->instance_mask); + } else { + /* default path */ + ret = psp_ras_trigger_error(&adev->psp, &block_info, info->instance_mask); + } + + if (ret) + dev_err(adev->dev, "ras inject %s failed %d\n", + get_ras_block_str(&info->head), ret); + + return ret; +} + +/** + * amdgpu_ras_query_error_count_helper -- Get error counter for specific IP + * @adev: pointer to AMD GPU device + * @ce_count: pointer to an integer to be set to the count of correctible errors. + * @ue_count: pointer to an integer to be set to the count of uncorrectible errors. + * @query_info: pointer to ras_query_if + * + * Return 0 for query success or do nothing, otherwise return an error + * on failures + */ +static int amdgpu_ras_query_error_count_helper(struct amdgpu_device *adev, + unsigned long *ce_count, + unsigned long *ue_count, + struct ras_query_if *query_info) +{ + int ret; + + if (!query_info) + /* do nothing if query_info is not specified */ + return 0; + + ret = amdgpu_ras_query_error_status(adev, query_info); + if (ret) + return ret; + + *ce_count += query_info->ce_count; + *ue_count += query_info->ue_count; + + /* some hardware/IP supports read to clear + * no need to explictly reset the err status after the query call */ + if (adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 2) && + adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 4)) { + if (amdgpu_ras_reset_error_status(adev, query_info->head.block)) + dev_warn(adev->dev, + "Failed to reset error counter and error status\n"); + } + + return 0; +} + +/** + * amdgpu_ras_query_error_count -- Get error counts of all IPs or specific IP + * @adev: pointer to AMD GPU device + * @ce_count: pointer to an integer to be set to the count of correctible errors. + * @ue_count: pointer to an integer to be set to the count of uncorrectible + * errors. + * @query_info: pointer to ras_query_if if the query request is only for + * specific ip block; if info is NULL, then the qurey request is for + * all the ip blocks that support query ras error counters/status + * + * If set, @ce_count or @ue_count, count and return the corresponding + * error counts in those integer pointers. Return 0 if the device + * supports RAS. Return -EOPNOTSUPP if the device doesn't support RAS. + */ +int amdgpu_ras_query_error_count(struct amdgpu_device *adev, + unsigned long *ce_count, + unsigned long *ue_count, + struct ras_query_if *query_info) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_manager *obj; + unsigned long ce, ue; + int ret; + + if (!adev->ras_enabled || !con) + return -EOPNOTSUPP; + + /* Don't count since no reporting. + */ + if (!ce_count && !ue_count) + return 0; + + ce = 0; + ue = 0; + if (!query_info) { + /* query all the ip blocks that support ras query interface */ + list_for_each_entry(obj, &con->head, node) { + struct ras_query_if info = { + .head = obj->head, + }; + + ret = amdgpu_ras_query_error_count_helper(adev, &ce, &ue, &info); + } + } else { + /* query specific ip block */ + ret = amdgpu_ras_query_error_count_helper(adev, &ce, &ue, query_info); + } + + if (ret) + return ret; + + if (ce_count) + *ce_count = ce; + + if (ue_count) + *ue_count = ue; + + return 0; +} +/* 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 AMDGPU_RAS_RETIRE_PAGE_RESERVED: + return "R"; + case AMDGPU_RAS_RETIRE_PAGE_PENDING: + return "P"; + case AMDGPU_RAS_RETIRE_PAGE_FAULT: + default: + return "F"; + } +} + +/** + * DOC: AMDGPU 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: + * + * .. code-block:: bash + * + * 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 sysfs_emit(buf, "feature mask: 0x%x\n", con->features); +} + +static void amdgpu_ras_sysfs_remove_bad_page_node(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + + if (adev->dev->kobj.sd) + sysfs_remove_file_from_group(&adev->dev->kobj, + &con->badpages_attr.attr, + RAS_FS_NAME); +} + +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 attribute_group group = { + .name = RAS_FS_NAME, + .attrs = attrs, + }; + + if (adev->dev->kobj.sd) + sysfs_remove_group(&adev->dev->kobj, &group); + + return 0; +} + +int amdgpu_ras_sysfs_create(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; + + get_obj(obj); + + snprintf(obj->fs_data.sysfs_name, sizeof(obj->fs_data.sysfs_name), + "%s_err_count", head->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_FS_NAME)) { + 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; + + if (adev->dev->kobj.sd) + sysfs_remove_file_from_group(&adev->dev->kobj, + &obj->sysfs_attr.attr, + RAS_FS_NAME); + 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); + } + + if (amdgpu_bad_page_threshold != 0) + amdgpu_ras_sysfs_remove_bad_page_node(adev); + + amdgpu_ras_sysfs_remove_feature_node(adev); + + return 0; +} +/* sysfs end */ + +/** + * DOC: AMDGPU RAS Reboot Behavior for Unrecoverable Errors + * + * Normally when there is an uncorrectable error, the driver will reset + * the GPU to recover. However, in the event of an unrecoverable error, + * the driver provides an interface to reboot the system automatically + * in that event. + * + * The following file in debugfs provides that interface: + * /sys/kernel/debug/dri/[0/1/2...]/ras/auto_reboot + * + * Usage: + * + * .. code-block:: bash + * + * echo true > .../ras/auto_reboot + * + */ +/* debugfs begin */ +static struct dentry *amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct amdgpu_ras_eeprom_control *eeprom = &con->eeprom_control; + struct drm_minor *minor = adev_to_drm(adev)->primary; + struct dentry *dir; + + dir = debugfs_create_dir(RAS_FS_NAME, minor->debugfs_root); + debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, dir, adev, + &amdgpu_ras_debugfs_ctrl_ops); + debugfs_create_file("ras_eeprom_reset", S_IWUGO | S_IRUGO, dir, adev, + &amdgpu_ras_debugfs_eeprom_ops); + debugfs_create_u32("bad_page_cnt_threshold", 0444, dir, + &con->bad_page_cnt_threshold); + debugfs_create_u32("ras_num_recs", 0444, dir, &eeprom->ras_num_recs); + debugfs_create_x32("ras_hw_enabled", 0444, dir, &adev->ras_hw_enabled); + debugfs_create_x32("ras_enabled", 0444, dir, &adev->ras_enabled); + debugfs_create_file("ras_eeprom_size", S_IRUGO, dir, adev, + &amdgpu_ras_debugfs_eeprom_size_ops); + con->de_ras_eeprom_table = debugfs_create_file("ras_eeprom_table", + S_IRUGO, dir, adev, + &amdgpu_ras_debugfs_eeprom_table_ops); + amdgpu_ras_debugfs_set_ret_size(&con->eeprom_control); + + /* + * After one uncorrectable error happens, usually GPU recovery will + * be scheduled. But due to the known problem in GPU recovery failing + * to bring GPU back, below interface provides one direct way to + * user to reboot system automatically in such case within + * ERREVENT_ATHUB_INTERRUPT generated. Normal GPU recovery routine + * will never be called. + */ + debugfs_create_bool("auto_reboot", S_IWUGO | S_IRUGO, dir, &con->reboot); + + /* + * User could set this not to clean up hardware's error count register + * of RAS IPs during ras recovery. + */ + debugfs_create_bool("disable_ras_err_cnt_harvest", 0644, dir, + &con->disable_ras_err_cnt_harvest); + return dir; +} + +static void amdgpu_ras_debugfs_create(struct amdgpu_device *adev, + struct ras_fs_if *head, + struct dentry *dir) +{ + struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head); + + if (!obj || !dir) + return; + + get_obj(obj); + + memcpy(obj->fs_data.debugfs_name, + head->debugfs_name, + sizeof(obj->fs_data.debugfs_name)); + + debugfs_create_file(obj->fs_data.debugfs_name, S_IWUGO | S_IRUGO, dir, + obj, &amdgpu_ras_debugfs_ops); +} + +void amdgpu_ras_debugfs_create_all(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct dentry *dir; + struct ras_manager *obj; + struct ras_fs_if fs_info; + + /* + * it won't be called in resume path, no need to check + * suspend and gpu reset status + */ + if (!IS_ENABLED(CONFIG_DEBUG_FS) || !con) + return; + + dir = amdgpu_ras_debugfs_create_ctrl_node(adev); + + list_for_each_entry(obj, &con->head, node) { + if (amdgpu_ras_is_supported(adev, obj->head.block) && + (obj->attr_inuse == 1)) { + sprintf(fs_info.debugfs_name, "%s_err_inject", + get_ras_block_str(&obj->head)); + fs_info.head = obj->head; + amdgpu_ras_debugfs_create(adev, &fs_info, dir); + } + } +} + +/* debugfs end */ + +/* ras fs */ +static BIN_ATTR(gpu_vram_bad_pages, S_IRUGO, + amdgpu_ras_sysfs_badpages_read, NULL, 0); +static DEVICE_ATTR(features, S_IRUGO, + amdgpu_ras_sysfs_features_read, NULL); +static int amdgpu_ras_fs_init(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct attribute_group group = { + .name = RAS_FS_NAME, + }; + struct attribute *attrs[] = { + &con->features_attr.attr, + NULL + }; + struct bin_attribute *bin_attrs[] = { + NULL, + NULL, + }; + int r; + + /* add features entry */ + con->features_attr = dev_attr_features; + group.attrs = attrs; + sysfs_attr_init(attrs[0]); + + if (amdgpu_bad_page_threshold != 0) { + /* add bad_page_features entry */ + bin_attr_gpu_vram_bad_pages.private = NULL; + con->badpages_attr = bin_attr_gpu_vram_bad_pages; + bin_attrs[0] = &con->badpages_attr; + group.bin_attrs = bin_attrs; + sysfs_bin_attr_init(bin_attrs[0]); + } + + r = sysfs_create_group(&adev->dev->kobj, &group); + if (r) + dev_err(adev->dev, "Failed to create RAS sysfs group!"); + + return 0; +} + +static int amdgpu_ras_fs_fini(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_manager *con_obj, *ip_obj, *tmp; + + if (IS_ENABLED(CONFIG_DEBUG_FS)) { + list_for_each_entry_safe(con_obj, tmp, &con->head, node) { + ip_obj = amdgpu_ras_find_obj(adev, &con_obj->head); + if (ip_obj) + put_obj(ip_obj); + } + } + + amdgpu_ras_sysfs_remove_all(adev); + return 0; +} +/* ras fs end */ + +/* ih begin */ + +/* For the hardware that cannot enable bif ring for both ras_controller_irq + * and ras_err_evnet_athub_irq ih cookies, the driver has to poll status + * register to check whether the interrupt is triggered or not, and properly + * ack the interrupt if it is there + */ +void amdgpu_ras_interrupt_fatal_error_handler(struct amdgpu_device *adev) +{ + /* Fatal error events are handled on host side */ + if (amdgpu_sriov_vf(adev)) + return; + + if (adev->nbio.ras && + adev->nbio.ras->handle_ras_controller_intr_no_bifring) + adev->nbio.ras->handle_ras_controller_intr_no_bifring(adev); + + if (adev->nbio.ras && + adev->nbio.ras->handle_ras_err_event_athub_intr_no_bifring) + adev->nbio.ras->handle_ras_err_event_athub_intr_no_bifring(adev); +} + +static void amdgpu_ras_interrupt_poison_consumption_handler(struct ras_manager *obj, + struct amdgpu_iv_entry *entry) +{ + bool poison_stat = false; + struct amdgpu_device *adev = obj->adev; + struct amdgpu_ras_block_object *block_obj = + amdgpu_ras_get_ras_block(adev, obj->head.block, 0); + + if (!block_obj) + return; + + /* both query_poison_status and handle_poison_consumption are optional, + * but at least one of them should be implemented if we need poison + * consumption handler + */ + if (block_obj->hw_ops && block_obj->hw_ops->query_poison_status) { + poison_stat = block_obj->hw_ops->query_poison_status(adev); + if (!poison_stat) { + /* Not poison consumption interrupt, no need to handle it */ + dev_info(adev->dev, "No RAS poison status in %s poison IH.\n", + block_obj->ras_comm.name); + + return; + } + } + + amdgpu_umc_poison_handler(adev, false); + + if (block_obj->hw_ops && block_obj->hw_ops->handle_poison_consumption) + poison_stat = block_obj->hw_ops->handle_poison_consumption(adev); + + /* gpu reset is fallback for failed and default cases */ + if (poison_stat) { + dev_info(adev->dev, "GPU reset for %s RAS poison consumption is issued!\n", + block_obj->ras_comm.name); + amdgpu_ras_reset_gpu(adev); + } else { + amdgpu_gfx_poison_consumption_handler(adev, entry); + } +} + +static void amdgpu_ras_interrupt_poison_creation_handler(struct ras_manager *obj, + struct amdgpu_iv_entry *entry) +{ + dev_info(obj->adev->dev, + "Poison is created, no user action is needed.\n"); +} + +static void amdgpu_ras_interrupt_umc_handler(struct ras_manager *obj, + struct amdgpu_iv_entry *entry) +{ + struct ras_ih_data *data = &obj->ih_data; + struct ras_err_data err_data = {0, 0, 0, NULL}; + int ret; + + if (!data->cb) + return; + + /* Let IP handle its data, maybe we need get the output + * from the callback to update the error type/count, etc + */ + 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_handler(struct ras_manager *obj) +{ + struct ras_ih_data *data = &obj->ih_data; + struct amdgpu_iv_entry entry; + + 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; + + if (amdgpu_ras_is_poison_mode_supported(obj->adev)) { + if (obj->head.block == AMDGPU_RAS_BLOCK__UMC) + amdgpu_ras_interrupt_poison_creation_handler(obj, &entry); + else + amdgpu_ras_interrupt_poison_consumption_handler(obj, &entry); + } else { + if (obj->head.block == AMDGPU_RAS_BLOCK__UMC) + amdgpu_ras_interrupt_umc_handler(obj, &entry); + else + dev_warn(obj->adev->dev, + "No RAS interrupt handler for non-UMC block with poison disabled.\n"); + } + } +} + +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_common_if *head) +{ + struct ras_manager *obj = amdgpu_ras_find_obj(adev, 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_common_if *head) +{ + struct ras_manager *obj = amdgpu_ras_find_obj(adev, head); + struct ras_ih_data *data; + struct amdgpu_ras_block_object *ras_obj; + + if (!obj) { + /* in case we registe the IH before enable ras feature */ + obj = amdgpu_ras_create_obj(adev, head); + if (!obj) + return -EINVAL; + } else + get_obj(obj); + + ras_obj = container_of(head, struct amdgpu_ras_block_object, ras_comm); + + data = &obj->ih_data; + /* add the callback.etc */ + *data = (struct ras_ih_data) { + .inuse = 0, + .cb = ras_obj->ras_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) { + amdgpu_ras_interrupt_remove_handler(adev, &obj->head); + } + + return 0; +} +/* ih end */ + +/* traversal all IPs except NBIO to query error counter */ +static void amdgpu_ras_log_on_err_counter(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_manager *obj; + + if (!adev->ras_enabled || !con) + return; + + list_for_each_entry(obj, &con->head, node) { + struct ras_query_if info = { + .head = obj->head, + }; + + /* + * PCIE_BIF IP has one different isr by ras controller + * interrupt, the specific ras counter query will be + * done in that isr. So skip such block from common + * sync flood interrupt isr calling. + */ + if (info.head.block == AMDGPU_RAS_BLOCK__PCIE_BIF) + continue; + + /* + * this is a workaround for aldebaran, skip send msg to + * smu to get ecc_info table due to smu handle get ecc + * info table failed temporarily. + * should be removed until smu fix handle ecc_info table. + */ + if ((info.head.block == AMDGPU_RAS_BLOCK__UMC) && + (adev->ip_versions[MP1_HWIP][0] == IP_VERSION(13, 0, 2))) + continue; + + amdgpu_ras_query_error_status(adev, &info); + + if (adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 2) && + adev->ip_versions[MP0_HWIP][0] != IP_VERSION(11, 0, 4) && + adev->ip_versions[MP0_HWIP][0] != IP_VERSION(13, 0, 0)) { + if (amdgpu_ras_reset_error_status(adev, info.head.block)) + dev_warn(adev->dev, "Failed to reset error counter and error status"); + } + } +} + +/* Parse RdRspStatus and WrRspStatus */ +static void amdgpu_ras_error_status_query(struct amdgpu_device *adev, + struct ras_query_if *info) +{ + struct amdgpu_ras_block_object *block_obj; + /* + * Only two block need to query read/write + * RspStatus at current state + */ + if ((info->head.block != AMDGPU_RAS_BLOCK__GFX) && + (info->head.block != AMDGPU_RAS_BLOCK__MMHUB)) + return; + + block_obj = amdgpu_ras_get_ras_block(adev, + info->head.block, + info->head.sub_block_index); + + if (!block_obj || !block_obj->hw_ops) { + dev_dbg_once(adev->dev, "%s doesn't config RAS function\n", + get_ras_block_str(&info->head)); + return; + } + + if (block_obj->hw_ops->query_ras_error_status) + block_obj->hw_ops->query_ras_error_status(adev); + +} + +static void amdgpu_ras_query_err_status(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_manager *obj; + + if (!adev->ras_enabled || !con) + return; + + list_for_each_entry(obj, &con->head, node) { + struct ras_query_if info = { + .head = obj->head, + }; + + amdgpu_ras_error_status_query(adev, &info); + } +} + +/* 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, status; + + 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; + ret = -EINVAL; + 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].retired_page, + .size = AMDGPU_GPU_PAGE_SIZE, + .flags = AMDGPU_RAS_RETIRE_PAGE_RESERVED, + }; + status = amdgpu_vram_mgr_query_page_status(&adev->mman.vram_mgr, + data->bps[i].retired_page); + if (status == -EBUSY) + (*bps)[i].flags = AMDGPU_RAS_RETIRE_PAGE_PENDING; + else if (status == -ENOENT) + (*bps)[i].flags = AMDGPU_RAS_RETIRE_PAGE_FAULT; + } + + *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); + struct amdgpu_device *remote_adev = NULL; + struct amdgpu_device *adev = ras->adev; + struct list_head device_list, *device_list_handle = NULL; + + if (!ras->disable_ras_err_cnt_harvest) { + struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev); + + /* Build list of devices to query RAS related errors */ + if (hive && adev->gmc.xgmi.num_physical_nodes > 1) { + device_list_handle = &hive->device_list; + } else { + INIT_LIST_HEAD(&device_list); + list_add_tail(&adev->gmc.xgmi.head, &device_list); + device_list_handle = &device_list; + } + + list_for_each_entry(remote_adev, + device_list_handle, gmc.xgmi.head) { + amdgpu_ras_query_err_status(remote_adev); + amdgpu_ras_log_on_err_counter(remote_adev); + } + + amdgpu_put_xgmi_hive(hive); + } + + if (amdgpu_device_should_recover_gpu(ras->adev)) { + struct amdgpu_reset_context reset_context; + memset(&reset_context, 0, sizeof(reset_context)); + + reset_context.method = AMD_RESET_METHOD_NONE; + reset_context.reset_req_dev = adev; + + /* Perform full reset in fatal error mode */ + if (!amdgpu_ras_is_poison_mode_supported(ras->adev)) + set_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags); + else { + clear_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags); + + if (ras->gpu_reset_flags & AMDGPU_RAS_GPU_RESET_MODE2_RESET) { + ras->gpu_reset_flags &= ~AMDGPU_RAS_GPU_RESET_MODE2_RESET; + reset_context.method = AMD_RESET_METHOD_MODE2; + } + + /* Fatal error occurs in poison mode, mode1 reset is used to + * recover gpu. + */ + if (ras->gpu_reset_flags & AMDGPU_RAS_GPU_RESET_MODE1_RESET) { + ras->gpu_reset_flags &= ~AMDGPU_RAS_GPU_RESET_MODE1_RESET; + set_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags); + + psp_fatal_error_recovery_quirk(&adev->psp); + } + } + + amdgpu_device_gpu_recover(ras->adev, NULL, &reset_context); + } + 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, 512); + void *bps = kmalloc(align_space * sizeof(*data->bps), GFP_KERNEL); + + if (!bps) { + return -ENOMEM; + } + + if (data->bps) { + memcpy(bps, data->bps, + data->count * sizeof(*data->bps)); + kfree(data->bps); + } + + data->bps = bps; + data->space_left += align_space - old_space; + return 0; +} + +/* it deal with vram only. */ +int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev, + struct eeprom_table_record *bps, int pages) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_err_handler_data *data; + int ret = 0; + uint32_t i; + + if (!con || !con->eh_data || !bps || pages <= 0) + return 0; + + mutex_lock(&con->recovery_lock); + data = con->eh_data; + if (!data) + goto out; + + for (i = 0; i < pages; i++) { + if (amdgpu_ras_check_bad_page_unlock(con, + bps[i].retired_page << AMDGPU_GPU_PAGE_SHIFT)) + continue; + + if (!data->space_left && + amdgpu_ras_realloc_eh_data_space(adev, data, 256)) { + ret = -ENOMEM; + goto out; + } + + amdgpu_vram_mgr_reserve_range(&adev->mman.vram_mgr, + bps[i].retired_page << AMDGPU_GPU_PAGE_SHIFT, + AMDGPU_GPU_PAGE_SIZE); + + memcpy(&data->bps[data->count], &bps[i], sizeof(*data->bps)); + data->count++; + data->space_left--; + } +out: + mutex_unlock(&con->recovery_lock); + + return ret; +} + +/* + * write error record array to eeprom, the function should be + * protected by recovery_lock + * new_cnt: new added UE count, excluding reserved bad pages, can be NULL + */ +int amdgpu_ras_save_bad_pages(struct amdgpu_device *adev, + unsigned long *new_cnt) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_err_handler_data *data; + struct amdgpu_ras_eeprom_control *control; + int save_count; + + if (!con || !con->eh_data) { + if (new_cnt) + *new_cnt = 0; + + return 0; + } + + mutex_lock(&con->recovery_lock); + control = &con->eeprom_control; + data = con->eh_data; + save_count = data->count - control->ras_num_recs; + mutex_unlock(&con->recovery_lock); + + if (new_cnt) + *new_cnt = save_count / adev->umc.retire_unit; + + /* only new entries are saved */ + if (save_count > 0) { + if (amdgpu_ras_eeprom_append(control, + &data->bps[control->ras_num_recs], + save_count)) { + dev_err(adev->dev, "Failed to save EEPROM table data!"); + return -EIO; + } + + dev_info(adev->dev, "Saved %d pages to EEPROM table.\n", save_count); + } + + return 0; +} + +/* + * read error record array in eeprom and reserve enough space for + * storing new bad pages + */ +static int amdgpu_ras_load_bad_pages(struct amdgpu_device *adev) +{ + struct amdgpu_ras_eeprom_control *control = + &adev->psp.ras_context.ras->eeprom_control; + struct eeprom_table_record *bps; + int ret; + + /* no bad page record, skip eeprom access */ + if (control->ras_num_recs == 0 || amdgpu_bad_page_threshold == 0) + return 0; + + bps = kcalloc(control->ras_num_recs, sizeof(*bps), GFP_KERNEL); + if (!bps) + return -ENOMEM; + + ret = amdgpu_ras_eeprom_read(control, bps, control->ras_num_recs); + if (ret) + dev_err(adev->dev, "Failed to load EEPROM table records!"); + else + ret = amdgpu_ras_add_bad_pages(adev, bps, control->ras_num_recs); + + kfree(bps); + return ret; +} + +static bool amdgpu_ras_check_bad_page_unlock(struct amdgpu_ras *con, + uint64_t addr) +{ + struct ras_err_handler_data *data = con->eh_data; + int i; + + addr >>= AMDGPU_GPU_PAGE_SHIFT; + for (i = 0; i < data->count; i++) + if (addr == data->bps[i].retired_page) + return true; + + return false; +} + +/* + * check if an address belongs to bad page + * + * Note: this check is only for umc block + */ +static bool amdgpu_ras_check_bad_page(struct amdgpu_device *adev, + uint64_t addr) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + bool ret = false; + + if (!con || !con->eh_data) + return ret; + + mutex_lock(&con->recovery_lock); + ret = amdgpu_ras_check_bad_page_unlock(con, addr); + mutex_unlock(&con->recovery_lock); + return ret; +} + +static void amdgpu_ras_validate_threshold(struct amdgpu_device *adev, + uint32_t max_count) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + + /* + * Justification of value bad_page_cnt_threshold in ras structure + * + * Generally, 0 <= amdgpu_bad_page_threshold <= max record length + * in eeprom or amdgpu_bad_page_threshold == -2, introduce two + * scenarios accordingly. + * + * Bad page retirement enablement: + * - If amdgpu_bad_page_threshold = -2, + * bad_page_cnt_threshold = typical value by formula. + * + * - When the value from user is 0 < amdgpu_bad_page_threshold < + * max record length in eeprom, use it directly. + * + * Bad page retirement disablement: + * - If amdgpu_bad_page_threshold = 0, bad page retirement + * functionality is disabled, and bad_page_cnt_threshold will + * take no effect. + */ + + if (amdgpu_bad_page_threshold < 0) { + u64 val = adev->gmc.mc_vram_size; + + do_div(val, RAS_BAD_PAGE_COVER); + con->bad_page_cnt_threshold = min(lower_32_bits(val), + max_count); + } else { + con->bad_page_cnt_threshold = min_t(int, max_count, + amdgpu_bad_page_threshold); + } +} + +int amdgpu_ras_recovery_init(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_err_handler_data **data; + u32 max_eeprom_records_count = 0; + bool exc_err_limit = false; + int ret; + + if (!con || amdgpu_sriov_vf(adev)) + return 0; + + /* Allow access to RAS EEPROM via debugfs, when the ASIC + * supports RAS and debugfs is enabled, but when + * adev->ras_enabled is unset, i.e. when "ras_enable" + * module parameter is set to 0. + */ + con->adev = adev; + + if (!adev->ras_enabled) + return 0; + + data = &con->eh_data; + *data = kmalloc(sizeof(**data), GFP_KERNEL | __GFP_ZERO); + if (!*data) { + ret = -ENOMEM; + goto out; + } + + mutex_init(&con->recovery_lock); + INIT_WORK(&con->recovery_work, amdgpu_ras_do_recovery); + atomic_set(&con->in_recovery, 0); + con->eeprom_control.bad_channel_bitmap = 0; + + max_eeprom_records_count = amdgpu_ras_eeprom_max_record_count(&con->eeprom_control); + amdgpu_ras_validate_threshold(adev, max_eeprom_records_count); + + /* Todo: During test the SMU might fail to read the eeprom through I2C + * when the GPU is pending on XGMI reset during probe time + * (Mostly after second bus reset), skip it now + */ + if (adev->gmc.xgmi.pending_reset) + return 0; + ret = amdgpu_ras_eeprom_init(&con->eeprom_control, &exc_err_limit); + /* + * This calling fails when exc_err_limit is true or + * ret != 0. + */ + if (exc_err_limit || ret) + goto free; + + if (con->eeprom_control.ras_num_recs) { + ret = amdgpu_ras_load_bad_pages(adev); + if (ret) + goto free; + + amdgpu_dpm_send_hbm_bad_pages_num(adev, con->eeprom_control.ras_num_recs); + + if (con->update_channel_flag == true) { + amdgpu_dpm_send_hbm_bad_channel_flag(adev, con->eeprom_control.bad_channel_bitmap); + con->update_channel_flag = false; + } + } + +#ifdef CONFIG_X86_MCE_AMD + if ((adev->asic_type == CHIP_ALDEBARAN) && + (adev->gmc.xgmi.connected_to_cpu)) + amdgpu_register_bad_pages_mca_notifier(adev); +#endif + return 0; + +free: + kfree((*data)->bps); + kfree(*data); + con->eh_data = NULL; +out: + dev_warn(adev->dev, "Failed to initialize ras recovery! (%d)\n", ret); + + /* + * Except error threshold exceeding case, other failure cases in this + * function would not fail amdgpu driver init. + */ + if (!exc_err_limit) + ret = 0; + else + ret = -EINVAL; + + return ret; +} + +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; + + /* recovery_init failed to init it, fini is useless */ + if (!data) + return 0; + + cancel_work_sync(&con->recovery_work); + + mutex_lock(&con->recovery_lock); + con->eh_data = NULL; + kfree(data->bps); + kfree(data); + mutex_unlock(&con->recovery_lock); + + return 0; +} +/* recovery end */ + +static bool amdgpu_ras_asic_supported(struct amdgpu_device *adev) +{ + if (amdgpu_sriov_vf(adev)) { + switch (adev->ip_versions[MP0_HWIP][0]) { + case IP_VERSION(13, 0, 2): + case IP_VERSION(13, 0, 6): + return true; + default: + return false; + } + } + + if (adev->asic_type == CHIP_IP_DISCOVERY) { + switch (adev->ip_versions[MP0_HWIP][0]) { + case IP_VERSION(13, 0, 0): + case IP_VERSION(13, 0, 6): + case IP_VERSION(13, 0, 10): + return true; + default: + return false; + } + } + + return adev->asic_type == CHIP_VEGA10 || + adev->asic_type == CHIP_VEGA20 || + adev->asic_type == CHIP_ARCTURUS || + adev->asic_type == CHIP_ALDEBARAN || + adev->asic_type == CHIP_SIENNA_CICHLID; +} + +/* + * this is workaround for vega20 workstation sku, + * force enable gfx ras, ignore vbios gfx ras flag + * due to GC EDC can not write + */ +static void amdgpu_ras_get_quirks(struct amdgpu_device *adev) +{ + struct atom_context *ctx = adev->mode_info.atom_context; + + if (!ctx) + return; + + if (strnstr(ctx->vbios_pn, "D16406", + sizeof(ctx->vbios_pn)) || + strnstr(ctx->vbios_pn, "D36002", + sizeof(ctx->vbios_pn))) + adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__GFX); +} + +/* + * 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) +{ + adev->ras_hw_enabled = adev->ras_enabled = 0; + + if (!amdgpu_ras_asic_supported(adev)) + return; + + if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) { + if (amdgpu_atomfirmware_mem_ecc_supported(adev)) { + dev_info(adev->dev, "MEM ECC is active.\n"); + adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__UMC | + 1 << AMDGPU_RAS_BLOCK__DF); + } else { + dev_info(adev->dev, "MEM ECC is not presented.\n"); + } + + if (amdgpu_atomfirmware_sram_ecc_supported(adev)) { + dev_info(adev->dev, "SRAM ECC is active.\n"); + if (!amdgpu_sriov_vf(adev)) + adev->ras_hw_enabled |= ~(1 << AMDGPU_RAS_BLOCK__UMC | + 1 << AMDGPU_RAS_BLOCK__DF); + else + adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__PCIE_BIF | + 1 << AMDGPU_RAS_BLOCK__SDMA | + 1 << AMDGPU_RAS_BLOCK__GFX); + + /* VCN/JPEG RAS can be supported on both bare metal and + * SRIOV environment + */ + if (adev->ip_versions[VCN_HWIP][0] == IP_VERSION(2, 6, 0) || + adev->ip_versions[VCN_HWIP][0] == IP_VERSION(4, 0, 0)) + adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__VCN | + 1 << AMDGPU_RAS_BLOCK__JPEG); + else + adev->ras_hw_enabled &= ~(1 << AMDGPU_RAS_BLOCK__VCN | + 1 << AMDGPU_RAS_BLOCK__JPEG); + + /* + * XGMI RAS is not supported if xgmi num physical nodes + * is zero + */ + if (!adev->gmc.xgmi.num_physical_nodes) + adev->ras_hw_enabled &= ~(1 << AMDGPU_RAS_BLOCK__XGMI_WAFL); + } else { + dev_info(adev->dev, "SRAM ECC is not presented.\n"); + } + } else { + /* driver only manages a few IP blocks RAS feature + * when GPU is connected cpu through XGMI */ + adev->ras_hw_enabled |= (1 << AMDGPU_RAS_BLOCK__GFX | + 1 << AMDGPU_RAS_BLOCK__SDMA | + 1 << AMDGPU_RAS_BLOCK__MMHUB); + } + + amdgpu_ras_get_quirks(adev); + + /* hw_supported needs to be aligned with RAS block mask. */ + adev->ras_hw_enabled &= AMDGPU_RAS_BLOCK_MASK; + + + /* + * Disable ras feature for aqua vanjaram + * by default on apu platform. + */ + if (adev->ip_versions[MP0_HWIP][0] == IP_VERSION(13, 0, 6) && + adev->gmc.is_app_apu) + adev->ras_enabled = amdgpu_ras_enable != 1 ? 0 : + adev->ras_hw_enabled & amdgpu_ras_mask; + else + adev->ras_enabled = amdgpu_ras_enable == 0 ? 0 : + adev->ras_hw_enabled & amdgpu_ras_mask; +} + +static void amdgpu_ras_counte_dw(struct work_struct *work) +{ + struct amdgpu_ras *con = container_of(work, struct amdgpu_ras, + ras_counte_delay_work.work); + struct amdgpu_device *adev = con->adev; + struct drm_device *dev = adev_to_drm(adev); + unsigned long ce_count, ue_count; + int res; + + res = pm_runtime_get_sync(dev->dev); + if (res < 0) + goto Out; + + /* Cache new values. + */ + if (amdgpu_ras_query_error_count(adev, &ce_count, &ue_count, NULL) == 0) { + atomic_set(&con->ras_ce_count, ce_count); + atomic_set(&con->ras_ue_count, ue_count); + } + + pm_runtime_mark_last_busy(dev->dev); +Out: + pm_runtime_put_autosuspend(dev->dev); +} + +static void amdgpu_ras_query_poison_mode(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + bool df_poison, umc_poison; + + /* poison setting is useless on SRIOV guest */ + if (amdgpu_sriov_vf(adev) || !con) + return; + + /* Init poison supported flag, the default value is false */ + if (adev->gmc.xgmi.connected_to_cpu) { + /* enabled by default when GPU is connected to CPU */ + con->poison_supported = true; + } else if (adev->df.funcs && + adev->df.funcs->query_ras_poison_mode && + adev->umc.ras && + adev->umc.ras->query_ras_poison_mode) { + df_poison = + adev->df.funcs->query_ras_poison_mode(adev); + umc_poison = + adev->umc.ras->query_ras_poison_mode(adev); + + /* Only poison is set in both DF and UMC, we can support it */ + if (df_poison && umc_poison) + con->poison_supported = true; + else if (df_poison != umc_poison) + dev_warn(adev->dev, + "Poison setting is inconsistent in DF/UMC(%d:%d)!\n", + df_poison, umc_poison); + } +} + +int amdgpu_ras_init(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + int r; + + if (con) + return 0; + + con = kmalloc(sizeof(struct amdgpu_ras) + + sizeof(struct ras_manager) * AMDGPU_RAS_BLOCK_COUNT + + sizeof(struct ras_manager) * AMDGPU_RAS_MCA_BLOCK_COUNT, + GFP_KERNEL|__GFP_ZERO); + if (!con) + return -ENOMEM; + + con->adev = adev; + INIT_DELAYED_WORK(&con->ras_counte_delay_work, amdgpu_ras_counte_dw); + atomic_set(&con->ras_ce_count, 0); + atomic_set(&con->ras_ue_count, 0); + + con->objs = (struct ras_manager *)(con + 1); + + amdgpu_ras_set_context(adev, con); + + amdgpu_ras_check_supported(adev); + + if (!adev->ras_enabled || adev->asic_type == CHIP_VEGA10) { + /* set gfx block ras context feature for VEGA20 Gaming + * send ras disable cmd to ras ta during ras late init. + */ + if (!adev->ras_enabled && adev->asic_type == CHIP_VEGA20) { + con->features |= BIT(AMDGPU_RAS_BLOCK__GFX); + + return 0; + } + + r = 0; + goto release_con; + } + + con->update_channel_flag = false; + con->features = 0; + INIT_LIST_HEAD(&con->head); + /* Might need get this flag from vbios. */ + con->flags = RAS_DEFAULT_FLAGS; + + /* initialize nbio ras function ahead of any other + * ras functions so hardware fatal error interrupt + * can be enabled as early as possible */ + switch (adev->ip_versions[NBIO_HWIP][0]) { + case IP_VERSION(7, 4, 0): + case IP_VERSION(7, 4, 1): + case IP_VERSION(7, 4, 4): + if (!adev->gmc.xgmi.connected_to_cpu) + adev->nbio.ras = &nbio_v7_4_ras; + break; + case IP_VERSION(4, 3, 0): + if (adev->ras_hw_enabled & (1 << AMDGPU_RAS_BLOCK__DF)) + /* unlike other generation of nbio ras, + * nbio v4_3 only support fatal error interrupt + * to inform software that DF is freezed due to + * system fatal error event. driver should not + * enable nbio ras in such case. Instead, + * check DF RAS */ + adev->nbio.ras = &nbio_v4_3_ras; + break; + case IP_VERSION(7, 9, 0): + if (!adev->gmc.is_app_apu) + adev->nbio.ras = &nbio_v7_9_ras; + break; + default: + /* nbio ras is not available */ + break; + } + + /* nbio ras block needs to be enabled ahead of other ras blocks + * to handle fatal error */ + r = amdgpu_nbio_ras_sw_init(adev); + if (r) + return r; + + if (adev->nbio.ras && + adev->nbio.ras->init_ras_controller_interrupt) { + r = adev->nbio.ras->init_ras_controller_interrupt(adev); + if (r) + goto release_con; + } + + if (adev->nbio.ras && + adev->nbio.ras->init_ras_err_event_athub_interrupt) { + r = adev->nbio.ras->init_ras_err_event_athub_interrupt(adev); + if (r) + goto release_con; + } + + amdgpu_ras_query_poison_mode(adev); + + if (amdgpu_ras_fs_init(adev)) { + r = -EINVAL; + goto release_con; + } + + dev_info(adev->dev, "RAS INFO: ras initialized successfully, " + "hardware ability[%x] ras_mask[%x]\n", + adev->ras_hw_enabled, adev->ras_enabled); + + return 0; +release_con: + amdgpu_ras_set_context(adev, NULL); + kfree(con); + + return r; +} + +int amdgpu_persistent_edc_harvesting_supported(struct amdgpu_device *adev) +{ + if (adev->gmc.xgmi.connected_to_cpu || + adev->gmc.is_app_apu) + return 1; + return 0; +} + +static int amdgpu_persistent_edc_harvesting(struct amdgpu_device *adev, + struct ras_common_if *ras_block) +{ + struct ras_query_if info = { + .head = *ras_block, + }; + + if (!amdgpu_persistent_edc_harvesting_supported(adev)) + return 0; + + if (amdgpu_ras_query_error_status(adev, &info) != 0) + DRM_WARN("RAS init harvest failure"); + + if (amdgpu_ras_reset_error_status(adev, ras_block->block) != 0) + DRM_WARN("RAS init harvest reset failure"); + + return 0; +} + +bool amdgpu_ras_is_poison_mode_supported(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + + if (!con) + return false; + + return con->poison_supported; +} + +/* helper function to handle common stuff in ip late init phase */ +int amdgpu_ras_block_late_init(struct amdgpu_device *adev, + struct ras_common_if *ras_block) +{ + struct amdgpu_ras_block_object *ras_obj = NULL; + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct ras_query_if *query_info; + unsigned long ue_count, ce_count; + int r; + + /* disable RAS feature per IP block if it is not supported */ + if (!amdgpu_ras_is_supported(adev, ras_block->block)) { + amdgpu_ras_feature_enable_on_boot(adev, ras_block, 0); + return 0; + } + + r = amdgpu_ras_feature_enable_on_boot(adev, ras_block, 1); + if (r) { + if (adev->in_suspend || amdgpu_in_reset(adev)) { + /* in resume phase, if fail to enable ras, + * clean up all ras fs nodes, and disable ras */ + goto cleanup; + } else + return r; + } + + /* check for errors on warm reset edc persisant supported ASIC */ + amdgpu_persistent_edc_harvesting(adev, ras_block); + + /* in resume phase, no need to create ras fs node */ + if (adev->in_suspend || amdgpu_in_reset(adev)) + return 0; + + ras_obj = container_of(ras_block, struct amdgpu_ras_block_object, ras_comm); + if (ras_obj->ras_cb || (ras_obj->hw_ops && + (ras_obj->hw_ops->query_poison_status || + ras_obj->hw_ops->handle_poison_consumption))) { + r = amdgpu_ras_interrupt_add_handler(adev, ras_block); + if (r) + goto cleanup; + } + + if (ras_obj->hw_ops && + (ras_obj->hw_ops->query_ras_error_count || + ras_obj->hw_ops->query_ras_error_status)) { + r = amdgpu_ras_sysfs_create(adev, ras_block); + if (r) + goto interrupt; + + /* Those are the cached values at init. + */ + query_info = kzalloc(sizeof(*query_info), GFP_KERNEL); + if (!query_info) + return -ENOMEM; + memcpy(&query_info->head, ras_block, sizeof(struct ras_common_if)); + + if (amdgpu_ras_query_error_count(adev, &ce_count, &ue_count, query_info) == 0) { + atomic_set(&con->ras_ce_count, ce_count); + atomic_set(&con->ras_ue_count, ue_count); + } + + kfree(query_info); + } + + return 0; + +interrupt: + if (ras_obj->ras_cb) + amdgpu_ras_interrupt_remove_handler(adev, ras_block); +cleanup: + amdgpu_ras_feature_enable(adev, ras_block, 0); + return r; +} + +static int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev, + struct ras_common_if *ras_block) +{ + return amdgpu_ras_block_late_init(adev, ras_block); +} + +/* helper function to remove ras fs node and interrupt handler */ +void amdgpu_ras_block_late_fini(struct amdgpu_device *adev, + struct ras_common_if *ras_block) +{ + struct amdgpu_ras_block_object *ras_obj; + if (!ras_block) + return; + + amdgpu_ras_sysfs_remove(adev, ras_block); + + ras_obj = container_of(ras_block, struct amdgpu_ras_block_object, ras_comm); + if (ras_obj->ras_cb) + amdgpu_ras_interrupt_remove_handler(adev, ras_block); +} + +static void amdgpu_ras_block_late_fini_default(struct amdgpu_device *adev, + struct ras_common_if *ras_block) +{ + return amdgpu_ras_block_late_fini(adev, ras_block); +} + +/* 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 (!adev->ras_enabled || !con) { + /* clean ras context for VEGA20 Gaming after send ras disable cmd */ + amdgpu_release_ras_context(adev); + + 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)); + } + } + } +} + +void amdgpu_ras_suspend(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + + if (!adev->ras_enabled || !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); +} + +int amdgpu_ras_late_init(struct amdgpu_device *adev) +{ + struct amdgpu_ras_block_list *node, *tmp; + struct amdgpu_ras_block_object *obj; + int r; + + /* Guest side doesn't need init ras feature */ + if (amdgpu_sriov_vf(adev)) + return 0; + + list_for_each_entry_safe(node, tmp, &adev->ras_list, node) { + if (!node->ras_obj) { + dev_warn(adev->dev, "Warning: abnormal ras list node.\n"); + continue; + } + + obj = node->ras_obj; + if (obj->ras_late_init) { + r = obj->ras_late_init(adev, &obj->ras_comm); + if (r) { + dev_err(adev->dev, "%s failed to execute ras_late_init! ret:%d\n", + obj->ras_comm.name, r); + return r; + } + } else + amdgpu_ras_block_late_init_default(adev, &obj->ras_comm); + } + + return 0; +} + +/* 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 (!adev->ras_enabled || !con) + return 0; + + + /* Need disable ras on all IPs here before ip [hw/sw]fini */ + if (con->features) + 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_block_list *ras_node, *tmp; + struct amdgpu_ras_block_object *obj = NULL; + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + + if (!adev->ras_enabled || !con) + return 0; + + list_for_each_entry_safe(ras_node, tmp, &adev->ras_list, node) { + if (ras_node->ras_obj) { + obj = ras_node->ras_obj; + if (amdgpu_ras_is_supported(adev, obj->ras_comm.block) && + obj->ras_fini) + obj->ras_fini(adev, &obj->ras_comm); + else + amdgpu_ras_block_late_fini_default(adev, &obj->ras_comm); + } + + /* Clear ras blocks from ras_list and free ras block list node */ + list_del(&ras_node->node); + kfree(ras_node); + } + + 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); + + cancel_delayed_work_sync(&con->ras_counte_delay_work); + + amdgpu_ras_set_context(adev, NULL); + kfree(con); + + return 0; +} + +void amdgpu_ras_global_ras_isr(struct amdgpu_device *adev) +{ + if (atomic_cmpxchg(&amdgpu_ras_in_intr, 0, 1) == 0) { + struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); + + dev_info(adev->dev, "uncorrectable hardware error" + "(ERREVENT_ATHUB_INTERRUPT) detected!\n"); + + ras->gpu_reset_flags |= AMDGPU_RAS_GPU_RESET_MODE1_RESET; + amdgpu_ras_reset_gpu(adev); + } +} + +bool amdgpu_ras_need_emergency_restart(struct amdgpu_device *adev) +{ + if (adev->asic_type == CHIP_VEGA20 && + adev->pm.fw_version <= 0x283400) { + return !(amdgpu_asic_reset_method(adev) == AMD_RESET_METHOD_BACO) && + amdgpu_ras_intr_triggered(); + } + + return false; +} + +void amdgpu_release_ras_context(struct amdgpu_device *adev) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + + if (!con) + return; + + if (!adev->ras_enabled && con->features & BIT(AMDGPU_RAS_BLOCK__GFX)) { + con->features &= ~BIT(AMDGPU_RAS_BLOCK__GFX); + amdgpu_ras_set_context(adev, NULL); + kfree(con); + } +} + +#ifdef CONFIG_X86_MCE_AMD +static struct amdgpu_device *find_adev(uint32_t node_id) +{ + int i; + struct amdgpu_device *adev = NULL; + + for (i = 0; i < mce_adev_list.num_gpu; i++) { + adev = mce_adev_list.devs[i]; + + if (adev && adev->gmc.xgmi.connected_to_cpu && + adev->gmc.xgmi.physical_node_id == node_id) + break; + adev = NULL; + } + + return adev; +} + +#define GET_MCA_IPID_GPUID(m) (((m) >> 44) & 0xF) +#define GET_UMC_INST(m) (((m) >> 21) & 0x7) +#define GET_CHAN_INDEX(m) ((((m) >> 12) & 0x3) | (((m) >> 18) & 0x4)) +#define GPU_ID_OFFSET 8 + +static int amdgpu_bad_page_notifier(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct mce *m = (struct mce *)data; + struct amdgpu_device *adev = NULL; + uint32_t gpu_id = 0; + uint32_t umc_inst = 0, ch_inst = 0; + + /* + * If the error was generated in UMC_V2, which belongs to GPU UMCs, + * and error occurred in DramECC (Extended error code = 0) then only + * process the error, else bail out. + */ + if (!m || !((smca_get_bank_type(m->extcpu, m->bank) == SMCA_UMC_V2) && + (XEC(m->status, 0x3f) == 0x0))) + return NOTIFY_DONE; + + /* + * If it is correctable error, return. + */ + if (mce_is_correctable(m)) + return NOTIFY_OK; + + /* + * GPU Id is offset by GPU_ID_OFFSET in MCA_IPID_UMC register. + */ + gpu_id = GET_MCA_IPID_GPUID(m->ipid) - GPU_ID_OFFSET; + + adev = find_adev(gpu_id); + if (!adev) { + DRM_WARN("%s: Unable to find adev for gpu_id: %d\n", __func__, + gpu_id); + return NOTIFY_DONE; + } + + /* + * If it is uncorrectable error, then find out UMC instance and + * channel index. + */ + umc_inst = GET_UMC_INST(m->ipid); + ch_inst = GET_CHAN_INDEX(m->ipid); + + dev_info(adev->dev, "Uncorrectable error detected in UMC inst: %d, chan_idx: %d", + umc_inst, ch_inst); + + if (!amdgpu_umc_page_retirement_mca(adev, m->addr, ch_inst, umc_inst)) + return NOTIFY_OK; + else + return NOTIFY_DONE; +} + +static struct notifier_block amdgpu_bad_page_nb = { + .notifier_call = amdgpu_bad_page_notifier, + .priority = MCE_PRIO_UC, +}; + +static void amdgpu_register_bad_pages_mca_notifier(struct amdgpu_device *adev) +{ + /* + * Add the adev to the mce_adev_list. + * During mode2 reset, amdgpu device is temporarily + * removed from the mgpu_info list which can cause + * page retirement to fail. + * Use this list instead of mgpu_info to find the amdgpu + * device on which the UMC error was reported. + */ + mce_adev_list.devs[mce_adev_list.num_gpu++] = adev; + + /* + * Register the x86 notifier only once + * with MCE subsystem. + */ + if (notifier_registered == false) { + mce_register_decode_chain(&amdgpu_bad_page_nb); + notifier_registered = true; + } +} +#endif + +struct amdgpu_ras *amdgpu_ras_get_context(struct amdgpu_device *adev) +{ + if (!adev) + return NULL; + + return adev->psp.ras_context.ras; +} + +int amdgpu_ras_set_context(struct amdgpu_device *adev, struct amdgpu_ras *ras_con) +{ + if (!adev) + return -EINVAL; + + adev->psp.ras_context.ras = ras_con; + return 0; +} + +/* check if ras is supported on block, say, sdma, gfx */ +int amdgpu_ras_is_supported(struct amdgpu_device *adev, + unsigned int block) +{ + int ret = 0; + struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); + + if (block >= AMDGPU_RAS_BLOCK_COUNT) + return 0; + + ret = ras && (adev->ras_enabled & (1 << block)); + + /* For the special asic with mem ecc enabled but sram ecc + * not enabled, even if the ras block is not supported on + * .ras_enabled, if the asic supports poison mode and the + * ras block has ras configuration, it can be considered + * that the ras block supports ras function. + */ + if (!ret && + (block == AMDGPU_RAS_BLOCK__GFX || + block == AMDGPU_RAS_BLOCK__SDMA || + block == AMDGPU_RAS_BLOCK__VCN || + block == AMDGPU_RAS_BLOCK__JPEG) && + amdgpu_ras_is_poison_mode_supported(adev) && + amdgpu_ras_get_ras_block(adev, block, 0)) + ret = 1; + + return ret; +} + +int amdgpu_ras_reset_gpu(struct amdgpu_device *adev) +{ + struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); + + if (atomic_cmpxchg(&ras->in_recovery, 0, 1) == 0) + amdgpu_reset_domain_schedule(ras->adev->reset_domain, &ras->recovery_work); + return 0; +} + + +/* Register each ip ras block into amdgpu ras */ +int amdgpu_ras_register_ras_block(struct amdgpu_device *adev, + struct amdgpu_ras_block_object *ras_block_obj) +{ + struct amdgpu_ras_block_list *ras_node; + if (!adev || !ras_block_obj) + return -EINVAL; + + ras_node = kzalloc(sizeof(*ras_node), GFP_KERNEL); + if (!ras_node) + return -ENOMEM; + + INIT_LIST_HEAD(&ras_node->node); + ras_node->ras_obj = ras_block_obj; + list_add_tail(&ras_node->node, &adev->ras_list); + + return 0; +} + +void amdgpu_ras_get_error_type_name(uint32_t err_type, char *err_type_name) +{ + if (!err_type_name) + return; + + switch (err_type) { + case AMDGPU_RAS_ERROR__SINGLE_CORRECTABLE: + sprintf(err_type_name, "correctable"); + break; + case AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE: + sprintf(err_type_name, "uncorrectable"); + break; + default: + sprintf(err_type_name, "unknown"); + break; + } +} + +bool amdgpu_ras_inst_get_memory_id_field(struct amdgpu_device *adev, + const struct amdgpu_ras_err_status_reg_entry *reg_entry, + uint32_t instance, + uint32_t *memory_id) +{ + uint32_t err_status_lo_data, err_status_lo_offset; + + if (!reg_entry) + return false; + + err_status_lo_offset = + AMDGPU_RAS_REG_ENTRY_OFFSET(reg_entry->hwip, instance, + reg_entry->seg_lo, reg_entry->reg_lo); + err_status_lo_data = RREG32(err_status_lo_offset); + + if ((reg_entry->flags & AMDGPU_RAS_ERR_STATUS_VALID) && + !REG_GET_FIELD(err_status_lo_data, ERR_STATUS_LO, ERR_STATUS_VALID_FLAG)) + return false; + + *memory_id = REG_GET_FIELD(err_status_lo_data, ERR_STATUS_LO, MEMORY_ID); + + return true; +} + +bool amdgpu_ras_inst_get_err_cnt_field(struct amdgpu_device *adev, + const struct amdgpu_ras_err_status_reg_entry *reg_entry, + uint32_t instance, + unsigned long *err_cnt) +{ + uint32_t err_status_hi_data, err_status_hi_offset; + + if (!reg_entry) + return false; + + err_status_hi_offset = + AMDGPU_RAS_REG_ENTRY_OFFSET(reg_entry->hwip, instance, + reg_entry->seg_hi, reg_entry->reg_hi); + err_status_hi_data = RREG32(err_status_hi_offset); + + if ((reg_entry->flags & AMDGPU_RAS_ERR_INFO_VALID) && + !REG_GET_FIELD(err_status_hi_data, ERR_STATUS_HI, ERR_INFO_VALID_FLAG)) + /* keep the check here in case we need to refer to the result later */ + dev_dbg(adev->dev, "Invalid err_info field\n"); + + /* read err count */ + *err_cnt = REG_GET_FIELD(err_status_hi_data, ERR_STATUS, ERR_CNT); + + return true; +} + +void amdgpu_ras_inst_query_ras_error_count(struct amdgpu_device *adev, + const struct amdgpu_ras_err_status_reg_entry *reg_list, + uint32_t reg_list_size, + const struct amdgpu_ras_memory_id_entry *mem_list, + uint32_t mem_list_size, + uint32_t instance, + uint32_t err_type, + unsigned long *err_count) +{ + uint32_t memory_id; + unsigned long err_cnt; + char err_type_name[16]; + uint32_t i, j; + + for (i = 0; i < reg_list_size; i++) { + /* query memory_id from err_status_lo */ + if (!amdgpu_ras_inst_get_memory_id_field(adev, ®_list[i], + instance, &memory_id)) + continue; + + /* query err_cnt from err_status_hi */ + if (!amdgpu_ras_inst_get_err_cnt_field(adev, ®_list[i], + instance, &err_cnt) || + !err_cnt) + continue; + + *err_count += err_cnt; + + /* log the errors */ + amdgpu_ras_get_error_type_name(err_type, err_type_name); + if (!mem_list) { + /* memory_list is not supported */ + dev_info(adev->dev, + "%ld %s hardware errors detected in %s, instance: %d, memory_id: %d\n", + err_cnt, err_type_name, + reg_list[i].block_name, + instance, memory_id); + } else { + for (j = 0; j < mem_list_size; j++) { + if (memory_id == mem_list[j].memory_id) { + dev_info(adev->dev, + "%ld %s hardware errors detected in %s, instance: %d, memory block: %s\n", + err_cnt, err_type_name, + reg_list[i].block_name, + instance, mem_list[j].name); + break; + } + } + } + } +} + +void amdgpu_ras_inst_reset_ras_error_count(struct amdgpu_device *adev, + const struct amdgpu_ras_err_status_reg_entry *reg_list, + uint32_t reg_list_size, + uint32_t instance) +{ + uint32_t err_status_lo_offset, err_status_hi_offset; + uint32_t i; + + for (i = 0; i < reg_list_size; i++) { + err_status_lo_offset = + AMDGPU_RAS_REG_ENTRY_OFFSET(reg_list[i].hwip, instance, + reg_list[i].seg_lo, reg_list[i].reg_lo); + err_status_hi_offset = + AMDGPU_RAS_REG_ENTRY_OFFSET(reg_list[i].hwip, instance, + reg_list[i].seg_hi, reg_list[i].reg_hi); + WREG32(err_status_lo_offset, 0); + WREG32(err_status_hi_offset, 0); + } +} |