android_kernel_samsung_hero.../drivers/soc/qcom/gladiator_erp.c
2016-08-17 16:41:52 +08:00

648 lines
16 KiB
C

/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/cpu_pm.h>
#include <linux/platform_device.h>
#include <soc/qcom/scm.h>
#define MODULE_NAME "gladiator_error_reporting"
/* SCM call service and command ID */
#define SCM_TZ_SVC_INFO 0x6
#define TZ_INFO_GET_SECURE_STATE 0x4
/* Secure State Check */
#define SEC_STATE_VALID(a) (a & (BIT(0) | BIT(2) | BIT(6)))
/* Register Offsets */
#define GLADIATOR_ID_COREID 0x0
#define GLADIATOR_ID_REVISIONID 0x4
#define GLADIATOR_FAULTEN 0x48
#define GLADIATOR_ERRVLD 0x4C
#define GLADIATOR_ERRCLR 0x50
#define GLADIATOR_ERRLOG0 0x54
#define GLADIATOR_ERRLOG1 0x58
#define GLADIATOR_ERRLOG2 0x5C
#define GLADIATOR_ERRLOG3 0x60
#define GLADIATOR_ERRLOG4 0x64
#define GLADIATOR_ERRLOG5 0x68
#define GLADIATOR_ERRLOG6 0x6C
#define GLADIATOR_ERRLOG7 0x70 /* Not used for error reporting */
#define GLADIATOR_ERRLOG8 0x74
#define OBSERVER_0_ID_COREID 0x1000
#define OBSERVER_0_FAULTEN 0x1008
#define OBSERVER_0_ERRVLD 0x100C
#define OBSERVER_0_ERRCLR 0x1010
#define OBSERVER_0_ERRLOG0 0x1014
#define OBSERVER_0_ERRLOG1 0x1018
#define OBSERVER_0_ERRLOG2 0x101C /* Not used for error reporting */
#define OBSERVER_0_ERRLOG3 0x1020
#define OBSERVER_0_ERRLOG4 0x1024
#define OBSERVER_0_ERRLOG5 0x1028
#define OBSERVER_0_ERRLOG6 0x102C /* Not used for error reporting */
#define OBSERVER_0_ERRLOG7 0x1030
#define OBSERVER_0_ERRLOG8 0x1034 /* Not used for error reporting */
#define OBSERVER_0_STALLEN 0x1038
#define OBSERVER_0_REVISIONID 0x1004
#define GLD_TRANS_OPCODE_MASK 0xE
#define GLD_TRANS_OPCODE_SHIFT 1
#define GLD_ERROR_TYPE_MASK 0x700
#define GLD_ERROR_TYPE_SHIFT 8
#define GLD_LEN1_MASK 0x7FF8000
#define GLD_LEN1_SHIFT 16
#define GLD_TRANS_SOURCEID_MASK 0x7
#define GLD_TRANS_SOURCEID_SHIFT 0
#define GLD_TRANS_TARGETID_MASK 0x7
#define GLD_TRANS_TARGETID_SHIFT 0
#define GLD_ERRLOG_ERROR 0x7
#define OBS_TRANS_OPCODE_MASK 0x1E
#define OBS_TRANS_OPCODE_SHIFT 1
#define OBS_ERROR_TYPE_MASK 0x700
#define OBS_ERROR_TYPE_SHIFT 8
#define OBS_LEN1_MASK 0x7F0000
#define OBS_LEN1_SHIFT 16
struct msm_gladiator_data {
void __iomem *gladiator_virt_base;
int erp_irq;
struct notifier_block pm_notifier_block;
};
static int enable_panic_on_error;
module_param(enable_panic_on_error, int, 0);
enum gld_trans_opcode {
GLD_RD,
GLD_RDX,
GLD_RDL,
GLD_RESERVED,
GLD_WR,
GLD_WRC,
GLD_PRE,
};
enum obs_trans_opcode {
OBS_RD,
OBS_RDW,
OBS_RDL,
OBS_RDX,
OBS_WR,
OBS_WRW,
OBS_WRC,
OBS_RESERVED,
OBS_PRE,
OBS_URG,
};
enum obs_err_code {
OBS_SLV,
OBS_DEC,
OBS_UNS,
OBS_DISC,
OBS_SEC,
OBS_HIDE,
OBS_TMO,
OBS_RSV,
};
enum err_log {
ERR_LOG0,
ERR_LOG1,
ERR_LOG2,
ERR_LOG3,
ERR_LOG4,
ERR_LOG5,
ERR_LOG6,
ERR_LOG7,
ERR_LOG8,
STALLEN,
};
static void clear_gladiator_error(void __iomem *gladiator_virt_base)
{
writel_relaxed(1, gladiator_virt_base + GLADIATOR_ERRCLR);
writel_relaxed(1, gladiator_virt_base + OBSERVER_0_ERRCLR);
}
static inline void print_gld_transaction(unsigned int opc)
{
switch (opc) {
case GLD_RD:
pr_alert("Transaction type: READ\n");
break;
case GLD_RDX:
pr_alert("Transaction type: EXCLUSIVE READ\n");
break;
case GLD_RDL:
pr_alert("Transaction type: LINKED READ\n");
break;
case GLD_WR:
pr_alert("Transaction type: WRITE\n");
break;
case GLD_WRC:
pr_alert("Transaction type: CONDITIONAL WRITE\n");
break;
case GLD_PRE:
pr_alert("Transaction: Preamble packet of linked sequence\n");
break;
default:
pr_alert("Transaction type: Unknown; value:%u\n", opc);
}
}
static inline void print_gld_errtype(unsigned int errtype)
{
if (errtype == 0)
pr_alert("Error type: Snoop data transfer\n");
else if (errtype == 1)
pr_alert("Error type: DVM error\n");
else
pr_alert("Error type: Unknown; value:%u\n", errtype);
}
static void decode_gld_errlog0(u32 err_reg)
{
unsigned int opc, errtype, len1;
opc = (err_reg & GLD_TRANS_OPCODE_MASK) >> GLD_TRANS_OPCODE_SHIFT;
errtype = (err_reg & GLD_ERROR_TYPE_MASK) >> GLD_ERROR_TYPE_SHIFT;
len1 = (err_reg & GLD_LEN1_MASK) >> GLD_LEN1_SHIFT;
print_gld_transaction(opc);
print_gld_errtype(errtype);
pr_alert("number of payload bytes: %d\n", len1 + 1);
}
static void decode_gld_errlog1(u32 err_reg)
{
if ((err_reg & GLD_ERRLOG_ERROR) == GLD_ERRLOG_ERROR)
pr_alert("Transaction issued on IO target generic interface\n");
else
pr_alert("Transaction source ID: %d\n",
(err_reg & GLD_TRANS_SOURCEID_MASK)
>> GLD_TRANS_SOURCEID_SHIFT);
}
static void decode_gld_errlog2(u32 err_reg)
{
if ((err_reg & GLD_ERRLOG_ERROR) == GLD_ERRLOG_ERROR)
pr_alert("Error response coming from: external DVM network\n");
else
pr_alert("Error response coming from: Target ID: %d\n",
(err_reg & GLD_TRANS_TARGETID_MASK)
>> GLD_TRANS_TARGETID_SHIFT);
}
static void decode_gld_errlog(u32 err_reg, unsigned int err_log)
{
switch (err_log) {
case ERR_LOG0:
decode_gld_errlog0(err_reg);
break;
case ERR_LOG1:
decode_gld_errlog1(err_reg);
break;
case ERR_LOG2:
decode_gld_errlog2(err_reg);
break;
case ERR_LOG3:
pr_alert("Lower 32-bits of error address: %08x\n", err_reg);
break;
case ERR_LOG4:
pr_alert("Upper 32-bits of error address: %08x\n", err_reg);
break;
case ERR_LOG5:
pr_alert("Lower 32-bits of user: %08x\n", err_reg);
break;
case ERR_LOG6:
pr_alert("Mid 32-bits(63-32) of user: %08x\n", err_reg);
break;
case ERR_LOG7:
break;
case ERR_LOG8:
pr_alert("Upper 32-bits(95-64) of user: %08x\n", err_reg);
break;
default:
pr_alert("Invalid error register; reg num:%u\n", err_log);
}
}
static inline void print_obs_transaction(unsigned int opc)
{
switch (opc) {
case OBS_RD:
pr_alert("Transaction type: READ\n");
break;
case OBS_RDW:
pr_alert("Transaction type: WRAPPED READ\n");
break;
case OBS_RDL:
pr_alert("Transaction type: LINKED READ\n");
break;
case OBS_RDX:
pr_alert("Transaction type: EXCLUSIVE READ\n");
break;
case OBS_WR:
pr_alert("Transaction type: WRITE\n");
break;
case OBS_WRW:
pr_alert("Transaction type: WRAPPED WRITE\n");
break;
case OBS_WRC:
pr_alert("Transaction type: CONDITIONAL WRITE\n");
break;
case OBS_PRE:
pr_alert("Transaction: Preamble packet of linked sequence\n");
break;
case OBS_URG:
pr_alert("Transaction type: Urgency Packet\n");
break;
default:
pr_alert("Transaction type: Unknown; value:%u\n", opc);
}
}
static inline void print_obs_errcode(unsigned int errcode)
{
switch (errcode) {
case OBS_SLV:
pr_alert("Error code: Target error detected by slave\n");
pr_alert("Source: Target\n");
break;
case OBS_DEC:
pr_alert("Error code: Address decode error\n");
pr_alert("Source: Initiator NIU\n");
break;
case OBS_UNS:
pr_alert("Error code: Unsupported request\n");
pr_alert("Source: Target NIU\n");
break;
case OBS_DISC:
pr_alert("Error code: Disconnected target or domain\n");
pr_alert("Source: Power Disconnect\n");
break;
case OBS_SEC:
pr_alert("Error code: Security violation\n");
pr_alert("Source: Initiator NIU or Firewall\n");
break;
case OBS_HIDE:
pr_alert("Error :Hidden security violation, reported as OK\n");
pr_alert("Source: Firewall\n");
break;
case OBS_TMO:
pr_alert("Error code: Time-out\n");
pr_alert("Source: Target NIU\n");
break;
default:
pr_alert("Error code: Unknown; code:%u\n", errcode);
}
}
static void decode_obs_errlog0(u32 err_reg)
{
unsigned int opc, errcode, len1;
opc = (err_reg & OBS_TRANS_OPCODE_MASK) >> OBS_TRANS_OPCODE_SHIFT;
errcode = (err_reg & OBS_ERROR_TYPE_MASK) >> OBS_ERROR_TYPE_SHIFT;
len1 = (err_reg & OBS_LEN1_MASK) >> OBS_LEN1_SHIFT;
print_obs_transaction(opc);
print_obs_errcode(errcode);
pr_alert("number of payload bytes: %d\n", len1 + 1);
}
static void decode_obs_errlog(u32 err_reg, unsigned int err_log)
{
switch (err_log) {
case ERR_LOG0:
decode_obs_errlog0(err_reg);
break;
case ERR_LOG1:
pr_alert("RouteId of the error: %08x\n", err_reg);
break;
case ERR_LOG2:
/* reserved error log register */
break;
case ERR_LOG3:
pr_alert("Lower 32-bits of error address: %08x\n", err_reg);
break;
case ERR_LOG4:
pr_alert("Upper 12-bits of error address: %08x\n", err_reg);
break;
case ERR_LOG5:
pr_alert("Lower 13-bits of user: %08x\n", err_reg);
break;
case ERR_LOG6:
/* reserved error log register */
break;
case ERR_LOG7:
pr_alert("Security filed of the logged error: %08x\n", err_reg);
break;
case ERR_LOG8:
/* reserved error log register */
break;
case STALLEN:
pr_alert("stall mode of the error logger: %08x\n",
err_reg & 0x1);
break;
default:
pr_alert("Invalid error register; reg num:%u\n", err_log);
}
}
static u32 get_gld_offset(unsigned int err_log)
{
u32 offset = 0;
switch (err_log) {
case ERR_LOG0:
offset = GLADIATOR_ERRLOG0;
break;
case ERR_LOG1:
offset = GLADIATOR_ERRLOG1;
break;
case ERR_LOG2:
offset = GLADIATOR_ERRLOG2;
break;
case ERR_LOG3:
offset = GLADIATOR_ERRLOG3;
break;
case ERR_LOG4:
offset = GLADIATOR_ERRLOG4;
break;
case ERR_LOG5:
offset = GLADIATOR_ERRLOG5;
break;
case ERR_LOG6:
offset = GLADIATOR_ERRLOG6;
break;
case ERR_LOG7:
offset = GLADIATOR_ERRLOG7;
break;
case ERR_LOG8:
offset = GLADIATOR_ERRLOG8;
break;
default:
pr_alert("Invalid gladiator error register; reg num:%u\n",
err_log);
}
return offset;
}
static u32 get_obs_offset(unsigned int err_log)
{
u32 offset = 0;
switch (err_log) {
case ERR_LOG0:
offset = OBSERVER_0_ERRLOG0;
break;
case ERR_LOG1:
offset = OBSERVER_0_ERRLOG1;
break;
case ERR_LOG2:
offset = OBSERVER_0_ERRLOG2;
break;
case ERR_LOG3:
offset = OBSERVER_0_ERRLOG3;
break;
case ERR_LOG4:
offset = OBSERVER_0_ERRLOG4;
break;
case ERR_LOG5:
offset = OBSERVER_0_ERRLOG5;
break;
case ERR_LOG6:
offset = OBSERVER_0_ERRLOG6;
break;
case ERR_LOG7:
offset = OBSERVER_0_ERRLOG7;
break;
case ERR_LOG8:
offset = OBSERVER_0_ERRLOG8;
break;
case STALLEN:
offset = OBSERVER_0_STALLEN;
break;
default:
pr_alert("Invalid observer error register; reg num:%u\n",
err_log);
}
return offset;
}
static irqreturn_t msm_gladiator_isr(int irq, void *dev_id)
{
u32 err_reg;
unsigned int err_log;
struct msm_gladiator_data *msm_gld_data = dev_id;
/* Check validity */
bool gld_err_valid = readl_relaxed(msm_gld_data->gladiator_virt_base +
GLADIATOR_ERRVLD);
bool obsrv_err_valid = readl_relaxed(msm_gld_data->gladiator_virt_base +
OBSERVER_0_ERRVLD);
if (!gld_err_valid && !obsrv_err_valid) {
pr_err("%s Invalid Gladiator error reported, clear it\n",
__func__);
/* Clear IRQ */
clear_gladiator_error(msm_gld_data->gladiator_virt_base);
return IRQ_HANDLED;
}
pr_alert("GLADIATOR ERROR DETECTED\n");
pr_alert("GLADIATOR error log register data:\n");
for (err_log = ERR_LOG0; err_log <= ERR_LOG8; err_log++) {
/* skip log register 7 as its reserved */
if (err_log == ERR_LOG7)
continue;
err_reg = readl_relaxed(msm_gld_data->gladiator_virt_base +
get_gld_offset(err_log));
decode_gld_errlog(err_reg, err_log);
}
pr_alert("Observor error log register data:\n");
for (err_log = ERR_LOG0; err_log <= STALLEN; err_log++) {
/* skip log register 2, 6 and 8 as they are reserved */
if ((err_log == ERR_LOG2) || (err_log == ERR_LOG6)
|| (err_log == ERR_LOG8))
continue;
err_reg = readl_relaxed(msm_gld_data->gladiator_virt_base +
get_obs_offset(err_log));
decode_obs_errlog(err_reg, err_log);
}
/* Clear IRQ */
clear_gladiator_error(msm_gld_data->gladiator_virt_base);
if (enable_panic_on_error)
BUG_ON(1);
else
WARN(1, "Gladiator Cache Interconnect Error Detected\n");
return IRQ_HANDLED;
}
static const struct of_device_id gladiator_erp_match_table[] = {
{ .compatible = "qcom,msm-gladiator" },
{},
};
static int parse_dt_node(struct platform_device *pdev,
struct msm_gladiator_data *msm_gld_data)
{
int ret = 0;
struct resource *res;
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "gladiator_base");
if (!res)
return -ENODEV;
if (!devm_request_mem_region(&pdev->dev, res->start,
resource_size(res),
"msm-gladiator-erp")) {
dev_err(&pdev->dev, "%s cannot reserve gladiator erp region\n",
__func__);
return -ENXIO;
}
msm_gld_data->gladiator_virt_base = devm_ioremap(&pdev->dev,
res->start, resource_size(res));
if (!msm_gld_data->gladiator_virt_base) {
dev_err(&pdev->dev, "%s cannot map gladiator register space\n",
__func__);
return -ENXIO;
}
msm_gld_data->erp_irq = platform_get_irq(pdev, 0);
if (!msm_gld_data->erp_irq)
return -ENODEV;
/* clear existing errors before enabling the interrupt */
clear_gladiator_error(msm_gld_data->gladiator_virt_base);
ret = devm_request_irq(&pdev->dev, msm_gld_data->erp_irq,
msm_gladiator_isr, IRQF_TRIGGER_HIGH,
"gladiator-error", msm_gld_data);
if (ret)
dev_err(&pdev->dev, "Failed to register irq handler\n");
return ret;
}
static inline void gladiator_irq_init(void __iomem *gladiator_virt_base)
{
writel_relaxed(1, gladiator_virt_base + GLADIATOR_FAULTEN);
writel_relaxed(1, gladiator_virt_base + OBSERVER_0_FAULTEN);
}
#define CCI_LEVEL 2
static int gladiator_erp_pm_callback(struct notifier_block *nb,
unsigned long val, void *data)
{
unsigned int level = (unsigned long) data;
struct msm_gladiator_data *msm_gld_data = container_of(nb,
struct msm_gladiator_data, pm_notifier_block);
if (level != CCI_LEVEL)
return NOTIFY_DONE;
switch (val) {
case CPU_CLUSTER_PM_EXIT:
gladiator_irq_init(msm_gld_data->gladiator_virt_base);
break;
default:
return NOTIFY_DONE;
}
return NOTIFY_OK;
}
static int gladiator_erp_probe(struct platform_device *pdev)
{
int ret;
struct msm_gladiator_data *msm_gld_data;
msm_gld_data = devm_kzalloc(&pdev->dev,
sizeof(struct msm_gladiator_data), GFP_KERNEL);
if (!msm_gld_data) {
ret = -ENOMEM;
goto bail;
}
ret = parse_dt_node(pdev, msm_gld_data);
if (ret)
goto free_data;
msm_gld_data->pm_notifier_block.notifier_call =
gladiator_erp_pm_callback;
gladiator_irq_init(msm_gld_data->gladiator_virt_base);
platform_set_drvdata(pdev, msm_gld_data);
cpu_pm_register_notifier(&msm_gld_data->pm_notifier_block);
#ifdef CONFIG_PANIC_ON_GLADIATOR_ERROR
enable_panic_on_error = 1;
#endif
dev_info(&pdev->dev, "MSM Gladiator Error Reporting Initialized\n");
return 0;
free_data:
devm_kfree(&pdev->dev, msm_gld_data);
bail:
dev_err(&pdev->dev, "Probe failed bailing out\n");
return ret;
}
static int scm_is_gladiator_erp_available(void)
{
int ret;
struct scm_desc desc = {0};
desc.args[0] = 0;
desc.arginfo = 0;
ret = scm_call2(SCM_SIP_FNID(SCM_TZ_SVC_INFO,
TZ_INFO_GET_SECURE_STATE),
&desc);
if (ret) {
pr_err("gladiator_error_reporting: SCM call failed\n");
return -ENODEV;
}
if (SEC_STATE_VALID(desc.ret[0]))
return 0;
else
return -ENODEV;
}
static struct platform_driver gladiator_erp_driver = {
.probe = gladiator_erp_probe,
.driver = {
.name = MODULE_NAME,
.owner = THIS_MODULE,
.of_match_table = gladiator_erp_match_table,
},
};
static int init_gladiator_erp(void)
{
int ret;
ret = scm_is_gladiator_erp_available();
if (ret) {
pr_info("Gladiator Error Reporting not available\n");
return -ENODEV;
}
return platform_driver_register(&gladiator_erp_driver);
}
subsys_initcall(init_gladiator_erp);
MODULE_DESCRIPTION("Gladiator Error Reporting");
MODULE_LICENSE("GPL v2");