diff options
Diffstat (limited to 'hw/fsp/fsp-elog-write.c')
| -rw-r--r-- | hw/fsp/fsp-elog-write.c | 643 |
1 files changed, 643 insertions, 0 deletions
diff --git a/hw/fsp/fsp-elog-write.c b/hw/fsp/fsp-elog-write.c new file mode 100644 index 0000000..ee79c4d --- /dev/null +++ b/hw/fsp/fsp-elog-write.c @@ -0,0 +1,643 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +/* + * This code will enable generation and pushing of error log + * from powernv, sapphire to FSP + * Critical events from sapphire that needs to be reported + * will be pushed on to FSP after converting the + * error log to Platform Error Log (PEL) format. + * This is termed as WRITE action to FSP. + */ + +#include <skiboot.h> +#include <fsp.h> +#include <cpu.h> +#include <lock.h> +#include <errno.h> +#include <fsp-elog.h> + +/* + * Maximum number buffers that are pre-allocated + * to hold elogs that are reported on Sapphire and + * powernv. + */ +#define ELOG_WRITE_MAX_RECORD 64 + +static LIST_HEAD(elog_write_pending); +static LIST_HEAD(elog_write_free); + +static struct lock elog_write_lock = LOCK_UNLOCKED; +static struct lock elog_panic_write_lock = LOCK_UNLOCKED; + +/* Platform Log ID as per the spec */ +static uint32_t sapphire_elog_id = 0xB0000000; +static uint32_t powernv_elog_id = 0xB1000000; + +/* log buffer to copy FSP log for READ */ +#define ELOG_WRITE_BUFFER_SIZE 0x00050000 +static void *elog_write_buffer = NULL; + +#define ELOG_PANIC_WRITE_BUFFER_SIZE 0x0010000 +static void *elog_panic_write_buffer = NULL; + +struct opal_errorlog *panic_write_buffer; +static int panic_write_buffer_valid; +static uint32_t elog_write_retries; + +/* Need forward declaration because of Circular dependency */ +static int create_opal_event(struct opal_errorlog *elog_data, char *pel_buffer); +static int opal_send_elog_to_fsp(void); + +void log_error(struct opal_err_info *e_info, void *data, uint16_t size, + const char *fmt, ...) +{ + struct opal_errorlog *buf; + int tag = 0x44455343; /* ASCII of DESC */ + va_list list; + char err_msg[250]; + + va_start(list, fmt); + vsnprintf(err_msg, sizeof(err_msg), fmt, list); + va_end(list); + + /* Log the error on to Sapphire console */ + prerror("%s", err_msg); + + buf = opal_elog_create(e_info); + if (buf == NULL) + prerror("ELOG: Error getting buffer to log error\n"); + else { + opal_elog_update_user_dump(buf, err_msg, tag, strlen(err_msg)); + /* Append any number of call out dumps */ + if (e_info->call_out) + e_info->call_out(buf, data, size); + if (elog_fsp_commit(buf)) + prerror("ELOG: Re-try error logging\n"); + } +} + + +void log_simple_error(struct opal_err_info *e_info, const char *fmt, ...) +{ + struct opal_errorlog *buf; + int tag = 0x44455343; /* ASCII of DESC */ + va_list list; + char err_msg[250]; + + va_start(list, fmt); + vsnprintf(err_msg, sizeof(err_msg), fmt, list); + va_end(list); + + /* Log the error on to Sapphire console */ + prerror("%s", err_msg); + + buf = opal_elog_create(e_info); + if (buf == NULL) + prerror("ELOG: Error getting buffer to log error\n"); + else { + opal_elog_update_user_dump(buf, err_msg, tag, strlen(err_msg)); + if (elog_fsp_commit(buf)) + prerror("ELOG: Re-try error logging\n"); + } +} + +static struct opal_errorlog *get_write_buffer(int opal_event_severity) +{ + struct opal_errorlog *buf; + + lock(&elog_write_lock); + if (list_empty(&elog_write_free)) { + unlock(&elog_write_lock); + if (opal_event_severity == OPAL_ERROR_PANIC) { + lock(&elog_panic_write_lock); + if (panic_write_buffer_valid == 0) { + buf = (struct opal_errorlog *) + panic_write_buffer; + panic_write_buffer_valid = 1; /* In Use */ + unlock(&elog_panic_write_lock); + } else { + unlock(&elog_panic_write_lock); + prerror("ELOG: Write buffer full. Retry later\n"); + return NULL; + } + } else { + prerror("ELOG: Write buffer list is full. Retry later\n"); + return NULL; + } + } else { + buf = list_pop(&elog_write_free, struct opal_errorlog, link); + unlock(&elog_write_lock); + } + + memset(buf, 0, sizeof(struct opal_errorlog)); + return buf; +} + +/* Reporting of error via struct opal_errorlog */ +struct opal_errorlog *opal_elog_create(struct opal_err_info *e_info) +{ + struct opal_errorlog *buf; + + buf = get_write_buffer(e_info->sev); + if (buf) { + buf->error_event_type = e_info->err_type; + buf->component_id = e_info->cmp_id; + buf->subsystem_id = e_info->subsystem; + buf->event_severity = e_info->sev; + buf->event_subtype = e_info->event_subtype; + buf->reason_code = e_info->reason_code; + buf->elog_origin = ORG_SAPPHIRE; + } + + return buf; +} + +static void remove_elog_head_entry(void) +{ + struct opal_errorlog *entry; + + lock(&elog_write_lock); + entry = list_pop(&elog_write_pending, struct opal_errorlog, link); + list_add_tail(&elog_write_free, &entry->link); + elog_write_retries = 0; + unlock(&elog_write_lock); +} + +static void opal_fsp_write_complete(struct fsp_msg *read_msg) +{ + uint8_t val; + + val = (read_msg->resp->word1 >> 8) & 0xff; + fsp_freemsg(read_msg); + + switch (val) { + case FSP_STATUS_SUCCESS: + remove_elog_head_entry(); + break; + + default: + if (elog_write_retries++ >= MAX_RETRIES) { + remove_elog_head_entry(); + prerror("ELOG: Error in writing to FSP!\n"); + } + break; + } + + if (opal_send_elog_to_fsp() != OPAL_SUCCESS) + prerror("ELOG: Error sending elog to FSP !\n"); +} + +/* write PEL format hex dump of the log to FSP */ +static int64_t fsp_opal_elog_write(size_t opal_elog_size) +{ + struct fsp_msg *elog_msg; + + elog_msg = fsp_mkmsg(FSP_CMD_CREATE_ERRLOG, 3, opal_elog_size, + 0, PSI_DMA_ERRLOG_WRITE_BUF); + if (!elog_msg) { + prerror("ELOG: Failed to create message for WRITE to FSP\n"); + return OPAL_INTERNAL_ERROR; + } + if (fsp_queue_msg(elog_msg, opal_fsp_write_complete)) { + fsp_freemsg(elog_msg); + elog_msg = NULL; + prerror("FSP: Error queueing elog update\n"); + return OPAL_INTERNAL_ERROR; + } + return OPAL_SUCCESS; +} + +static int opal_send_elog_to_fsp(void) +{ + struct opal_errorlog *head; + int rc = OPAL_SUCCESS; + int pel_offset = 0; + + /* Convert entry to PEL + * and push it down to FSP. We wait for the ack from + * FSP. + */ + lock(&elog_write_lock); + if (!list_empty(&elog_write_pending)) { + head = list_top(&elog_write_pending, + struct opal_errorlog, link); + pel_offset = create_opal_event(head, (char *)elog_write_buffer); + rc = fsp_opal_elog_write(pel_offset); + unlock(&elog_write_lock); + return rc; + } + unlock(&elog_write_lock); + return rc; +} + +static int opal_push_logs_sync_to_fsp(struct opal_errorlog *buf) +{ + struct fsp_msg *elog_msg; + int opal_elog_size = 0; + int rc = OPAL_SUCCESS; + + lock(&elog_panic_write_lock); + opal_elog_size = create_opal_event(buf, + (char *)elog_panic_write_buffer); + + elog_msg = fsp_mkmsg(FSP_CMD_CREATE_ERRLOG, 3, opal_elog_size, + 0, PSI_DMA_ELOG_PANIC_WRITE_BUF); + if (!elog_msg) { + prerror("ELOG: Failed to create message for WRITE to FSP\n"); + unlock(&elog_panic_write_lock); + return OPAL_INTERNAL_ERROR; + } + + if (fsp_sync_msg(elog_msg, false)) { + fsp_freemsg(elog_msg); + rc = OPAL_INTERNAL_ERROR; + } else { + rc = (elog_msg->resp->word1 >> 8) & 0xff; + fsp_freemsg(elog_msg); + } + + if ((buf == panic_write_buffer) && (panic_write_buffer_valid == 1)) { + panic_write_buffer_valid = 0; + unlock(&elog_panic_write_lock); + } else { + /* buffer got from the elog_write list , put it back */ + unlock(&elog_panic_write_lock); + lock(&elog_write_lock); + list_add_tail(&elog_write_free, &buf->link); + unlock(&elog_write_lock); + } + return rc; +} + +int elog_fsp_commit(struct opal_errorlog *buf) +{ + int rc = OPAL_SUCCESS; + + if (buf->event_severity == OPAL_ERROR_PANIC) { + rc = opal_push_logs_sync_to_fsp(buf); + return rc; + } + + lock(&elog_write_lock); + if (list_empty(&elog_write_pending)) { + list_add_tail(&elog_write_pending, &buf->link); + unlock(&elog_write_lock); + rc = opal_send_elog_to_fsp(); + return rc; + } + list_add_tail(&elog_write_pending, &buf->link); + unlock(&elog_write_lock); + return rc; +} + +/* This function is called from POWERNV to push logs + * on FSP + */ +static int opal_commit_log_to_fsp(struct opal_errorlog *buf) +{ + struct opal_errorlog *opal_buf; + int rc = OPAL_SUCCESS; + + /* Copy the buffer to Sapphire and queue it to push + * to FSP and return + */ + lock(&elog_write_lock); + if (list_empty(&elog_write_free)) { + unlock(&elog_write_lock); + prerror("ELOG: Error! Write buffer list is full. Retry later\n"); + return -1; + } + opal_buf = list_pop(&elog_write_free, struct opal_errorlog, link); + unlock(&elog_write_lock); + memcpy(opal_buf, buf, sizeof(struct opal_errorlog)); + opal_buf->elog_origin = ORG_POWERNV; + rc = elog_fsp_commit(opal_buf); + return rc; +} + +int opal_elog_update_user_dump(struct opal_errorlog *buf, unsigned char *data, + uint32_t tag, uint16_t size) +{ + char *buffer; + struct opal_user_data_section *tmp; + + if (!buf) { + prerror("ELOG: Cannot update user data. Buffer is invalid\n"); + return -1; + } + + buffer = (char *)buf->user_data_dump + buf->user_section_size; + if ((buf->user_section_size + size) > OPAL_LOG_MAX_DUMP) { + prerror("ELOG: Size of dump data overruns buffer\n"); + return -1; + } + + tmp = (struct opal_user_data_section *)buffer; + tmp->tag = tag; + tmp->size = size + sizeof(struct opal_user_data_section) - 1; + memcpy(tmp->data_dump, data, size); + + buf->user_section_size += tmp->size; + buf->user_section_count++; + return 0; +} + +/* Create MTMS section for sapphire log */ +static void create_mtms_section(struct opal_errorlog *elog_data, + char *pel_buffer, int *pel_offset) +{ + struct opal_mtms_section *mtms = (struct opal_mtms_section *) + (pel_buffer + *pel_offset); + + mtms->v6header.id = ELOG_SID_MACHINE_TYPE; + mtms->v6header.length = MTMS_SECTION_SIZE; + mtms->v6header.version = OPAL_EXT_HRD_VER; + mtms->v6header.subtype = 0; + mtms->v6header.component_id = elog_data->component_id; + + memset(mtms->model, 0x00, sizeof(mtms->model)); + memcpy(mtms->model, dt_prop_get(dt_root, "model"), OPAL_SYS_MODEL_LEN); + memset(mtms->serial_no, 0x00, sizeof(mtms->serial_no)); + + memcpy(mtms->serial_no, dt_prop_get(dt_root, "system-id"), + OPAL_SYS_SERIAL_LEN); + *pel_offset += MTMS_SECTION_SIZE; +} + +/* Create extended header section */ +static void create_extended_header_section(struct opal_errorlog *elog_data, + char *pel_buffer, int *pel_offset) +{ + const char *opalmodel = NULL; + uint64_t extd_time; + + struct opal_extended_header_section *extdhdr = + (struct opal_extended_header_section *) + (pel_buffer + *pel_offset); + + extdhdr->v6header.id = ELOG_SID_EXTENDED_HEADER; + extdhdr->v6header.length = EXTENDED_HEADER_SECTION_SIZE; + extdhdr->v6header.version = OPAL_EXT_HRD_VER; + extdhdr->v6header.subtype = 0; + extdhdr->v6header.component_id = elog_data->component_id; + + memset(extdhdr->model, 0x00, sizeof(extdhdr->model)); + opalmodel = dt_prop_get(dt_root, "model"); + memcpy(extdhdr->model, opalmodel, OPAL_SYS_MODEL_LEN); + + memset(extdhdr->serial_no, 0x00, sizeof(extdhdr->serial_no)); + memcpy(extdhdr->serial_no, dt_prop_get(dt_root, "system-id"), + OPAL_SYS_SERIAL_LEN); + + memset(extdhdr->opal_release_version, 0x00, + sizeof(extdhdr->opal_release_version)); + memset(extdhdr->opal_subsys_version, 0x00, + sizeof(extdhdr->opal_subsys_version)); + + fsp_rtc_get_cached_tod(&extdhdr->extended_header_date, &extd_time); + extdhdr->extended_header_time = extd_time >> 32; + extdhdr->opal_symid_len = 0; + memset(extdhdr->opalsymid, 0x00, sizeof(extdhdr->opalsymid)); + + *pel_offset += EXTENDED_HEADER_SECTION_SIZE; +} + +/* set src type */ +static void settype(struct opal_src_section *src, uint8_t src_type) +{ + char type[4]; + sprintf(type, "%02X", src_type); + memcpy(src->srcstring, type, 2); +} + +/* set SRC subsystem type */ +static void setsubsys(struct opal_src_section *src, uint8_t src_subsys) +{ + char subsys[4]; + sprintf(subsys, "%02X", src_subsys); + memcpy(src->srcstring+2, subsys, 2); +} + +/* Ser reason code of SRC */ +static void setrefcode(struct opal_src_section *src, uint16_t src_refcode) +{ + char refcode[8]; + sprintf(refcode, "%04X", src_refcode); + memcpy(src->srcstring+4, refcode, 4); +} + +/* Create SRC section of OPAL log */ +static void create_src_section(struct opal_errorlog *elog_data, + char *pel_buffer, int *pel_offset) +{ + struct opal_src_section *src = (struct opal_src_section *) + (pel_buffer + *pel_offset); + + src->v6header.id = ELOG_SID_PRIMARY_SRC; + src->v6header.length = SRC_SECTION_SIZE; + src->v6header.version = OPAL_ELOG_VERSION; + src->v6header.subtype = OPAL_ELOG_SST; + src->v6header.component_id = elog_data->component_id; + + src->version = OPAL_SRC_SEC_VER; + src->flags = 0; + src->wordcount = OPAL_SRC_MAX_WORD_COUNT; + src->srclength = SRC_LENGTH; + settype(src, OPAL_SRC_TYPE_ERROR); + setsubsys(src, OPAL_FAILING_SUBSYSTEM); + setrefcode(src, elog_data->reason_code); + memset(src->hexwords, 0 , (8 * 4)); + src->hexwords[0] = OPAL_SRC_FORMAT; + src->hexwords[4] = elog_data->additional_info[0]; + src->hexwords[5] = elog_data->additional_info[1]; + src->hexwords[6] = elog_data->additional_info[2]; + src->hexwords[7] = elog_data->additional_info[3]; + *pel_offset += SRC_SECTION_SIZE; +} + +/* Create user header section */ +static void create_user_header_section(struct opal_errorlog *elog_data, + char *pel_buffer, int *pel_offset) +{ + struct opal_user_header_section *usrhdr = + (struct opal_user_header_section *) + (pel_buffer + *pel_offset); + + usrhdr->v6header.id = ELOG_SID_USER_HEADER; + usrhdr->v6header.length = USER_HEADER_SECTION_SIZE; + usrhdr->v6header.version = OPAL_ELOG_VERSION; + usrhdr->v6header.subtype = OPAL_ELOG_SST; + usrhdr->v6header.component_id = elog_data->component_id; + + usrhdr->subsystem_id = elog_data->subsystem_id; + usrhdr->event_scope = 0; + usrhdr->event_severity = elog_data->event_severity; + usrhdr->event_type = elog_data->event_subtype; + + if (elog_data->elog_origin == ORG_SAPPHIRE) + usrhdr->action_flags = ERRL_ACTION_REPORT; + else + usrhdr->action_flags = ERRL_ACTION_NONE; + + *pel_offset += USER_HEADER_SECTION_SIZE; +} + +/* Create private header section */ +static void create_private_header_section(struct opal_errorlog *elog_data, + char *pel_buffer, int *pel_offset) +{ + uint64_t ctime; + struct opal_private_header_section *privhdr = + (struct opal_private_header_section *) + pel_buffer; + + privhdr->v6header.id = ELOG_SID_PRIVATE_HEADER; + privhdr->v6header.length = PRIVATE_HEADER_SECTION_SIZE; + privhdr->v6header.version = OPAL_ELOG_VERSION; + privhdr->v6header.subtype = OPAL_ELOG_SST; + privhdr->v6header.component_id = elog_data->component_id; + + fsp_rtc_get_cached_tod(&privhdr->create_date, &ctime); + privhdr->create_time = ctime >> 32; + privhdr->section_count = 5; + + privhdr->creator_subid_hi = 0x00; + privhdr->creator_subid_lo = 0x00; + + if (elog_data->elog_origin == ORG_SAPPHIRE) { + privhdr->plid = ++sapphire_elog_id; + privhdr->creator_id = OPAL_CID_SAPPHIRE; + } else { + privhdr->plid = ++powernv_elog_id; + privhdr->creator_id = OPAL_CID_POWERNV; + } + privhdr->log_entry_id = 0x00; /* entry id is updated by FSP */ + + *pel_offset += PRIVATE_HEADER_SECTION_SIZE; +} + +static void create_user_defined_section(struct opal_errorlog *elog_data, + char *pel_buffer, int *pel_offset) +{ + char *dump = (char *)pel_buffer + *pel_offset; + char *opal_buf = (char *)elog_data->user_data_dump; + struct opal_user_section *usrhdr; + struct opal_user_data_section *opal_usr_data; + struct opal_private_header_section *privhdr = + (struct opal_private_header_section *)pel_buffer; + int i; + + for (i = 0; i < elog_data->user_section_count; i++) { + + usrhdr = (struct opal_user_section *)dump; + opal_usr_data = (struct opal_user_data_section *)opal_buf; + + usrhdr->v6header.id = ELOG_SID_USER_DEFINED; + usrhdr->v6header.version = OPAL_ELOG_VERSION; + usrhdr->v6header.length = sizeof(struct opal_v6_header) + + opal_usr_data->size; + usrhdr->v6header.subtype = OPAL_ELOG_SST; + usrhdr->v6header.component_id = elog_data->component_id; + + memcpy(usrhdr->dump, opal_buf, opal_usr_data->size); + *pel_offset += usrhdr->v6header.length; + dump += usrhdr->v6header.length; + opal_buf += opal_usr_data->size; + privhdr->section_count++; + } +} + +/* Create all require section of PEL log and write to TCE buffer */ +static int create_opal_event(struct opal_errorlog *elog_data, char *pel_buffer) +{ + int pel_offset = 0; + + memset(pel_buffer, 0, PSI_DMA_ERRLOG_WRITE_BUF_SZ); + + create_private_header_section(elog_data, pel_buffer, &pel_offset); + create_user_header_section(elog_data, pel_buffer, &pel_offset); + create_src_section(elog_data, pel_buffer, &pel_offset); + create_extended_header_section(elog_data, pel_buffer, &pel_offset); + create_mtms_section(elog_data, pel_buffer, &pel_offset); + if (elog_data->user_section_count) + create_user_defined_section(elog_data, pel_buffer, &pel_offset); + + return pel_offset; +} + +/* Pre-allocate memory for writing error log to FSP */ +static int init_elog_write_free_list(uint32_t num_entries) +{ + struct opal_errorlog *entry; + int i; + + entry = zalloc(sizeof(struct opal_errorlog) * num_entries); + if (!entry) + goto out_err; + + for (i = 0; i < num_entries; ++i) { + list_add_tail(&elog_write_free, &entry->link); + entry++; + } + + /* Pre-allocate one single buffer for PANIC path */ + panic_write_buffer = zalloc(sizeof(struct opal_errorlog)); + if (!panic_write_buffer) + goto out_err; + + return 0; + +out_err: + return -ENOMEM; +} + +/* fsp elog init function */ +void fsp_elog_write_init(void) +{ + if (!fsp_present()) + return; + + elog_panic_write_buffer = memalign(TCE_PSIZE, + ELOG_PANIC_WRITE_BUFFER_SIZE); + if (!elog_panic_write_buffer) { + prerror("FSP: could not allocate ELOG_PANIC_WRITE_BUFFER!\n"); + return; + } + + elog_write_buffer = memalign(TCE_PSIZE, ELOG_WRITE_BUFFER_SIZE); + if (!elog_write_buffer) { + prerror("FSP: could not allocate ELOG_WRITE_BUFFER!\n"); + return; + } + + /* Map TCEs */ + fsp_tce_map(PSI_DMA_ELOG_PANIC_WRITE_BUF, elog_panic_write_buffer, + PSI_DMA_ELOG_PANIC_WRITE_BUF_SZ); + + fsp_tce_map(PSI_DMA_ERRLOG_WRITE_BUF, elog_write_buffer, + PSI_DMA_ERRLOG_WRITE_BUF_SZ); + + /* pre-allocate memory for 128 records */ + if (init_elog_write_free_list(ELOG_WRITE_MAX_RECORD)) { + prerror("ELOG: Cannot allocate WRITE buffers to log errors!\n"); + return; + } + + /* register opal Interface */ + opal_register(OPAL_ELOG_SEND, opal_commit_log_to_fsp, 1); +} |