blob: 54c2924c7fe98ae7cbc7184c2a19112f1fb1a640 [file] [log] [blame]
/*
* Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdbool.h>
#include <stdint.h>
#include <common/debug.h>
#include <lib/bakery_lock.h>
#include <lib/extensions/ras.h>
#include <lib/utils_def.h>
#include <services/sdei.h>
#include <plat/common/platform.h>
#include <platform_def.h>
#include <tegra194_ras_private.h>
#include <tegra_def.h>
#include <tegra_platform.h>
#include <tegra_private.h>
/*
* ERR<n>FR bits[63:32], it indicates supported RAS errors which can be enabled
* by setting corresponding bits in ERR<n>CTLR
*/
#define ERR_FR_EN_BITS_MASK 0xFFFFFFFF00000000ULL
/* bakery lock for platform RAS handler. */
static DEFINE_BAKERY_LOCK(ras_handler_lock);
#define ras_lock() bakery_lock_get(&ras_handler_lock)
#define ras_unlock() bakery_lock_release(&ras_handler_lock)
/*
* Function to handle an External Abort received at EL3.
* This function is invoked by RAS framework.
*/
static void tegra194_ea_handler(unsigned int ea_reason, uint64_t syndrome,
void *cookie, void *handle, uint64_t flags)
{
int32_t ret;
ras_lock();
ERROR("MPIDR 0x%lx: exception reason=%u syndrome=0x%llx\n",
read_mpidr(), ea_reason, syndrome);
/* Call RAS EA handler */
ret = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
if (ret != 0) {
ERROR("RAS error handled!\n");
ret = sdei_dispatch_event(TEGRA_SDEI_EP_EVENT_0 +
plat_my_core_pos());
if (ret != 0)
ERROR("sdei_dispatch_event returned %d\n", ret);
} else {
ERROR("Not a RAS error!\n");
}
ras_unlock();
}
/*
* Function to enable all supported RAS error report.
*
* Uncorrected errors are set to report as External abort (SError)
* Corrected errors are set to report as interrupt.
*/
void tegra194_ras_enable(void)
{
VERBOSE("%s\n", __func__);
/* skip RAS enablement if not a silicon platform. */
if (!tegra_platform_is_silicon()) {
return;
}
/*
* Iterate for each group(num_idx ERRSELRs starting from idx_start)
* use normal for loop instead of for_each_err_record_info to get rid
* of MISRA noise..
*/
for (uint32_t i = 0U; i < err_record_mappings.num_err_records; i++) {
const struct err_record_info *info = &err_record_mappings.err_records[i];
uint32_t idx_start = info->sysreg.idx_start;
uint32_t num_idx = info->sysreg.num_idx;
const struct ras_aux_data *aux_data = (const struct ras_aux_data *)info->aux_data;
assert(aux_data != NULL);
for (uint32_t j = 0; j < num_idx; j++) {
/* ERR<n>CTLR register value. */
uint64_t err_ctrl = 0ULL;
/* all supported errors for this node. */
uint64_t err_fr;
/* uncorrectable errors */
uint64_t uncorr_errs;
/* correctable errors */
uint64_t corr_errs;
/*
* Catch error if something wrong with the RAS aux data
* record table.
*/
assert(aux_data[j].err_ctrl != NULL);
/*
* Write to ERRSELR_EL1 to select the RAS error node.
* Always program this at first to select corresponding
* RAS node before any other RAS register r/w.
*/
ser_sys_select_record(idx_start + j);
err_fr = read_erxfr_el1() & ERR_FR_EN_BITS_MASK;
uncorr_errs = aux_data[j].err_ctrl();
corr_errs = ~uncorr_errs & err_fr;
/* enable error reporting */
ERR_CTLR_ENABLE_FIELD(err_ctrl, ED);
/* enable SError reporting for uncorrectable errors */
if ((uncorr_errs & err_fr) != 0ULL) {
ERR_CTLR_ENABLE_FIELD(err_ctrl, UE);
}
/* generate interrupt for corrected errors. */
if (corr_errs != 0ULL) {
ERR_CTLR_ENABLE_FIELD(err_ctrl, CFI);
}
/* enable the supported errors */
err_ctrl |= err_fr;
VERBOSE("errselr_el1:0x%x, erxfr:0x%llx, err_ctrl:0x%llx\n",
idx_start + j, err_fr, err_ctrl);
/* enable specified errors, or set to 0 if no supported error */
write_erxctlr_el1(err_ctrl);
/*
* Check if all the bit settings have been enabled to detect
* uncorrected/corrected errors, if not assert.
*/
assert(read_erxctlr_el1() == err_ctrl);
}
}
}
/*
* Function to clear RAS ERR<n>STATUS for corrected RAS error.
* This function ignores any new RAS error signaled during clearing; it is not
* multi-core safe(no ras_lock is taken to reduce overhead).
*/
void tegra194_ras_corrected_err_clear(void)
{
uint64_t clear_ce_status = 0ULL;
ERR_STATUS_SET_FIELD(clear_ce_status, AV, 0x1UL);
ERR_STATUS_SET_FIELD(clear_ce_status, V, 0x1UL);
ERR_STATUS_SET_FIELD(clear_ce_status, OF, 0x1UL);
ERR_STATUS_SET_FIELD(clear_ce_status, MV, 0x1UL);
ERR_STATUS_SET_FIELD(clear_ce_status, CE, 0x3UL);
for (uint32_t i = 0U; i < err_record_mappings.num_err_records; i++) {
const struct err_record_info *info = &err_record_mappings.err_records[i];
uint32_t idx_start = info->sysreg.idx_start;
uint32_t num_idx = info->sysreg.num_idx;
for (uint32_t j = 0U; j < num_idx; j++) {
uint64_t status;
uint32_t err_idx = idx_start + j;
write_errselr_el1(err_idx);
status = read_erxstatus_el1();
if (ERR_STATUS_GET_FIELD(status, CE) != 0U) {
write_erxstatus_el1(clear_ce_status);
}
}
}
}
/* Function to probe an error from error record group. */
static int32_t tegra194_ras_record_probe(const struct err_record_info *info,
int *probe_data)
{
/* Skip probing if not a silicon platform */
if (!tegra_platform_is_silicon()) {
return 0;
}
return ser_probe_sysreg(info->sysreg.idx_start, info->sysreg.num_idx, probe_data);
}
/* Function to handle error from one given node */
static int32_t tegra194_ras_node_handler(uint32_t errselr, const char *name,
const struct ras_error *errors, uint64_t status)
{
bool found = false;
uint32_t ierr = (uint32_t)ERR_STATUS_GET_FIELD(status, IERR);
uint32_t serr = (uint32_t)ERR_STATUS_GET_FIELD(status, SERR);
uint64_t val = 0;
/* not a valid error. */
if (ERR_STATUS_GET_FIELD(status, V) == 0U) {
return 0;
}
ERR_STATUS_SET_FIELD(val, V, 1);
/* keep the log print same as linux arm64_ras driver. */
ERROR("**************************************\n");
ERROR("RAS Error in %s, ERRSELR_EL1=0x%x:\n", name, errselr);
ERROR("\tStatus = 0x%llx\n", status);
/* Print uncorrectable errror information. */
if (ERR_STATUS_GET_FIELD(status, UE) != 0U) {
ERR_STATUS_SET_FIELD(val, UE, 1);
ERR_STATUS_SET_FIELD(val, UET, 1);
/* IERR to error message */
for (uint32_t i = 0; errors[i].error_msg != NULL; i++) {
if (ierr == errors[i].error_code) {
ERROR("\tIERR = %s: 0x%x\n",
errors[i].error_msg, ierr);
found = true;
break;
}
}
if (!found) {
ERROR("\tUnknown IERR: 0x%x\n", ierr);
}
ERROR("SERR = %s: 0x%x\n", ras_serr_to_str(serr), serr);
/* Overflow, multiple errors have been detected. */
if (ERR_STATUS_GET_FIELD(status, OF) != 0U) {
ERROR("\tOverflow (there may be more errors) - "
"Uncorrectable\n");
ERR_STATUS_SET_FIELD(val, OF, 1);
}
ERROR("\tUncorrectable (this is fatal)\n");
/* Miscellaneous Register Valid. */
if (ERR_STATUS_GET_FIELD(status, MV) != 0U) {
ERROR("\tMISC0 = 0x%lx\n", read_erxmisc0_el1());
ERROR("\tMISC1 = 0x%lx\n", read_erxmisc1_el1());
ERR_STATUS_SET_FIELD(val, MV, 1);
}
/* Address Valid. */
if (ERR_STATUS_GET_FIELD(status, AV) != 0U) {
ERROR("\tADDR = 0x%lx\n", read_erxaddr_el1());
ERR_STATUS_SET_FIELD(val, AV, 1);
}
/* Deferred error */
if (ERR_STATUS_GET_FIELD(status, DE) != 0U) {
ERROR("\tDeferred error\n");
ERR_STATUS_SET_FIELD(val, DE, 1);
}
} else {
/* For corrected error, simply clear it. */
VERBOSE("corrected RAS error is cleared: ERRSELR_EL1:0x%x, "
"IERR:0x%x, SERR:0x%x\n", errselr, ierr, serr);
ERR_STATUS_SET_FIELD(val, CE, 1);
}
ERROR("**************************************\n");
/* Write to clear reported errors. */
write_erxstatus_el1(val);
/* error handled */
return 0;
}
/* Function to handle one error node from an error record group. */
static int32_t tegra194_ras_record_handler(const struct err_record_info *info,
int probe_data, const struct err_handler_data *const data __unused)
{
uint32_t num_idx = info->sysreg.num_idx;
uint32_t idx_start = info->sysreg.idx_start;
const struct ras_aux_data *aux_data = info->aux_data;
const struct ras_error *errors;
uint32_t offset;
const char *node_name;
uint64_t status = 0ULL;
VERBOSE("%s\n", __func__);
assert(probe_data >= 0);
assert((uint32_t)probe_data < num_idx);
offset = (uint32_t)probe_data;
errors = aux_data[offset].error_records;
node_name = aux_data[offset].name;
assert(errors != NULL);
/* Write to ERRSELR_EL1 to select the error record */
ser_sys_select_record(idx_start + offset);
/* Retrieve status register from the error record */
status = read_erxstatus_el1();
return tegra194_ras_node_handler(idx_start + offset, node_name,
errors, status);
}
/* Instantiate RAS nodes */
PER_CORE_RAS_NODE_LIST(DEFINE_ONE_RAS_NODE)
PER_CLUSTER_RAS_NODE_LIST(DEFINE_ONE_RAS_NODE)
SCF_L3_BANK_RAS_NODE_LIST(DEFINE_ONE_RAS_NODE)
CCPLEX_RAS_NODE_LIST(DEFINE_ONE_RAS_NODE)
/* Instantiate RAS node groups */
static struct ras_aux_data per_core_ras_group[] = {
PER_CORE_RAS_GROUP_NODES
};
static struct ras_aux_data per_cluster_ras_group[] = {
PER_CLUSTER_RAS_GROUP_NODES
};
static struct ras_aux_data scf_l3_ras_group[] = {
SCF_L3_BANK_RAS_GROUP_NODES
};
static struct ras_aux_data ccplex_ras_group[] = {
CCPLEX_RAS_GROUP_NODES
};
/*
* We have same probe and handler for each error record group, use a macro to
* simply the record definition.
*/
#define ADD_ONE_ERR_GROUP(errselr_start, group) \
ERR_RECORD_SYSREG_V1((errselr_start), (uint32_t)ARRAY_SIZE((group)), \
&tegra194_ras_record_probe, \
&tegra194_ras_record_handler, (group))
/* RAS error record group information */
static struct err_record_info carmel_ras_records[] = {
/*
* Per core ras error records
* ERRSELR starts from 0*256 + Logical_CPU_ID*16 + 0 to
* 0*256 + Logical_CPU_ID*16 + 5 for each group.
* 8 cores/groups, 6 * 8 nodes in total.
*/
ADD_ONE_ERR_GROUP(0x000, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x010, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x020, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x030, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x040, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x050, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x060, per_core_ras_group),
ADD_ONE_ERR_GROUP(0x070, per_core_ras_group),
/*
* Per cluster ras error records
* ERRSELR starts from 2*256 + Logical_Cluster_ID*16 + 0 to
* 2*256 + Logical_Cluster_ID*16 + 3.
* 4 clusters/groups, 3 * 4 nodes in total.
*/
ADD_ONE_ERR_GROUP(0x200, per_cluster_ras_group),
ADD_ONE_ERR_GROUP(0x210, per_cluster_ras_group),
ADD_ONE_ERR_GROUP(0x220, per_cluster_ras_group),
ADD_ONE_ERR_GROUP(0x230, per_cluster_ras_group),
/*
* SCF L3_Bank ras error records
* ERRSELR: 3*256 + L3_Bank_ID, L3_Bank_ID: 0-3
* 1 groups, 4 nodes in total.
*/
ADD_ONE_ERR_GROUP(0x300, scf_l3_ras_group),
/*
* CCPLEX ras error records
* ERRSELR: 4*256 + Unit_ID, Unit_ID: 0 - 4
* 1 groups, 5 nodes in total.
*/
ADD_ONE_ERR_GROUP(0x400, ccplex_ras_group),
};
REGISTER_ERR_RECORD_INFO(carmel_ras_records);
/* dummy RAS interrupt */
static struct ras_interrupt carmel_ras_interrupts[] = {};
REGISTER_RAS_INTERRUPTS(carmel_ras_interrupts);
/*******************************************************************************
* RAS handler for the platform
******************************************************************************/
void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
void *handle, uint64_t flags)
{
#if RAS_EXTENSION
tegra194_ea_handler(ea_reason, syndrome, cookie, handle, flags);
#else
ERROR("Unhandled External Abort received on 0x%llx at EL3!\n",
read_mpidr_el1());
ERROR(" exception reason=%u syndrome=0x%lx\n", ea_reason, syndrome);
panic();
#endif
}