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powerpc/44x/fsp2: Add irq error handlers 

Add irq error handlers for cmu, plb, opb, mcue, conf
with debug information output in case of problems.

Signed-off-by: Ivan Mikhaylov <ivan@de.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Ivan Mikhaylov 2017-12-01 18:58:27 +03:00 committed by Michael Ellerman
parent 50f01c57d7
commit 7813043e1b
1 changed files with 204 additions and 1 deletions
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205
arch/powerpc/platforms/44x/fsp2.c
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@ -28,8 +28,17 @@
#include <asm/uic.h>
#include <asm/ppc4xx.h>
#include <asm/dcr.h>
#include <linux/interrupt.h>
#include <linux/of_irq.h>
#include "fsp2.h"
#define FSP2_BUS_ERR "ibm,bus-error-irq"
#define FSP2_CMU_ERR "ibm,cmu-error-irq"
#define FSP2_CONF_ERR "ibm,conf-error-irq"
#define FSP2_OPBD_ERR "ibm,opbd-error-irq"
#define FSP2_MCUE "ibm,mc-ue-irq"
#define FSP2_RST_WRN "ibm,reset-warning-irq"
static __initdata struct of_device_id fsp2_of_bus[] = {
{ .compatible = "ibm,plb4", },
{ .compatible = "ibm,plb6", },
@ -37,6 +46,194 @@ static __initdata struct of_device_id fsp2_of_bus[] = {
{},
};
static void l2regs(void)
{
pr_err("L2 Controller:\n");
pr_err("MCK: 0x%08x\n", mfl2(L2MCK));
pr_err("INT: 0x%08x\n", mfl2(L2INT));
pr_err("PLBSTAT0: 0x%08x\n", mfl2(L2PLBSTAT0));
pr_err("PLBSTAT1: 0x%08x\n", mfl2(L2PLBSTAT1));
pr_err("ARRSTAT0: 0x%08x\n", mfl2(L2ARRSTAT0));
pr_err("ARRSTAT1: 0x%08x\n", mfl2(L2ARRSTAT1));
pr_err("ARRSTAT2: 0x%08x\n", mfl2(L2ARRSTAT2));
pr_err("CPUSTAT: 0x%08x\n", mfl2(L2CPUSTAT));
pr_err("RACSTAT0: 0x%08x\n", mfl2(L2RACSTAT0));
pr_err("WACSTAT0: 0x%08x\n", mfl2(L2WACSTAT0));
pr_err("WACSTAT1: 0x%08x\n", mfl2(L2WACSTAT1));
pr_err("WACSTAT2: 0x%08x\n", mfl2(L2WACSTAT2));
pr_err("WDFSTAT: 0x%08x\n", mfl2(L2WDFSTAT));
pr_err("LOG0: 0x%08x\n", mfl2(L2LOG0));
pr_err("LOG1: 0x%08x\n", mfl2(L2LOG1));
pr_err("LOG2: 0x%08x\n", mfl2(L2LOG2));
pr_err("LOG3: 0x%08x\n", mfl2(L2LOG3));
pr_err("LOG4: 0x%08x\n", mfl2(L2LOG4));
pr_err("LOG5: 0x%08x\n", mfl2(L2LOG5));
}
static void show_plbopb_regs(u32 base, int num)
{
pr_err("\nPLBOPB Bridge %d:\n", num);
pr_err("GESR0: 0x%08x\n", mfdcr(base + PLB4OPB_GESR0));
pr_err("GESR1: 0x%08x\n", mfdcr(base + PLB4OPB_GESR1));
pr_err("GESR2: 0x%08x\n", mfdcr(base + PLB4OPB_GESR2));
pr_err("GEARU: 0x%08x\n", mfdcr(base + PLB4OPB_GEARU));
pr_err("GEAR: 0x%08x\n", mfdcr(base + PLB4OPB_GEAR));
}
static irqreturn_t bus_err_handler(int irq, void *data)
{
pr_err("Bus Error\n");
l2regs();
pr_err("\nPLB6 Controller:\n");
pr_err("BC_SHD: 0x%08x\n", mfdcr(DCRN_PLB6_SHD));
pr_err("BC_ERR: 0x%08x\n", mfdcr(DCRN_PLB6_ERR));
pr_err("\nPLB6-to-PLB4 Bridge:\n");
pr_err("ESR: 0x%08x\n", mfdcr(DCRN_PLB6PLB4_ESR));
pr_err("EARH: 0x%08x\n", mfdcr(DCRN_PLB6PLB4_EARH));
pr_err("EARL: 0x%08x\n", mfdcr(DCRN_PLB6PLB4_EARL));
pr_err("\nPLB4-to-PLB6 Bridge:\n");
pr_err("ESR: 0x%08x\n", mfdcr(DCRN_PLB4PLB6_ESR));
pr_err("EARH: 0x%08x\n", mfdcr(DCRN_PLB4PLB6_EARH));
pr_err("EARL: 0x%08x\n", mfdcr(DCRN_PLB4PLB6_EARL));
pr_err("\nPLB6-to-MCIF Bridge:\n");
pr_err("BESR0: 0x%08x\n", mfdcr(DCRN_PLB6MCIF_BESR0));
pr_err("BESR1: 0x%08x\n", mfdcr(DCRN_PLB6MCIF_BESR1));
pr_err("BEARH: 0x%08x\n", mfdcr(DCRN_PLB6MCIF_BEARH));
pr_err("BEARL: 0x%08x\n", mfdcr(DCRN_PLB6MCIF_BEARL));
pr_err("\nPLB4 Arbiter:\n");
pr_err("P0ESRH 0x%08x\n", mfdcr(DCRN_PLB4_P0ESRH));
pr_err("P0ESRL 0x%08x\n", mfdcr(DCRN_PLB4_P0ESRL));
pr_err("P0EARH 0x%08x\n", mfdcr(DCRN_PLB4_P0EARH));
pr_err("P0EARH 0x%08x\n", mfdcr(DCRN_PLB4_P0EARH));
pr_err("P1ESRH 0x%08x\n", mfdcr(DCRN_PLB4_P1ESRH));
pr_err("P1ESRL 0x%08x\n", mfdcr(DCRN_PLB4_P1ESRL));
pr_err("P1EARH 0x%08x\n", mfdcr(DCRN_PLB4_P1EARH));
pr_err("P1EARH 0x%08x\n", mfdcr(DCRN_PLB4_P1EARH));
show_plbopb_regs(DCRN_PLB4OPB0_BASE, 0);
show_plbopb_regs(DCRN_PLB4OPB1_BASE, 1);
show_plbopb_regs(DCRN_PLB4OPB2_BASE, 2);
show_plbopb_regs(DCRN_PLB4OPB3_BASE, 3);
pr_err("\nPLB4-to-AHB Bridge:\n");
pr_err("ESR: 0x%08x\n", mfdcr(DCRN_PLB4AHB_ESR));
pr_err("SEUAR: 0x%08x\n", mfdcr(DCRN_PLB4AHB_SEUAR));
pr_err("SELAR: 0x%08x\n", mfdcr(DCRN_PLB4AHB_SELAR));
pr_err("\nAHB-to-PLB4 Bridge:\n");
pr_err("\nESR: 0x%08x\n", mfdcr(DCRN_AHBPLB4_ESR));
pr_err("\nEAR: 0x%08x\n", mfdcr(DCRN_AHBPLB4_EAR));
panic("Bus Error\n");
}
static irqreturn_t cmu_err_handler(int irq, void *data) {
pr_err("CMU Error\n");
pr_err("FIR0: 0x%08x\n", mfcmu(CMUN_FIR0));
panic("CMU Error\n");
}
static irqreturn_t conf_err_handler(int irq, void *data) {
pr_err("Configuration Logic Error\n");
pr_err("CONF_FIR: 0x%08x\n", mfdcr(DCRN_CONF_FIR_RWC));
pr_err("RPERR0: 0x%08x\n", mfdcr(DCRN_CONF_RPERR0));
pr_err("RPERR1: 0x%08x\n", mfdcr(DCRN_CONF_RPERR1));
panic("Configuration Logic Error\n");
}
static irqreturn_t opbd_err_handler(int irq, void *data) {
panic("OPBD Error\n");
}
static irqreturn_t mcue_handler(int irq, void *data) {
pr_err("DDR: Uncorrectable Error\n");
pr_err("MCSTAT: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_MCSTAT));
pr_err("MCOPT1: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_MCOPT1));
pr_err("MCOPT2: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_MCOPT2));
pr_err("PHYSTAT: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_PHYSTAT));
pr_err("CFGR0: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_CFGR0));
pr_err("CFGR1: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_CFGR1));
pr_err("CFGR2: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_CFGR2));
pr_err("CFGR3: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_CFGR3));
pr_err("SCRUB_CNTL: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_SCRUB_CNTL));
pr_err("ECCERR_PORT0: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_ECCERR_PORT0));
pr_err("ECCERR_ADDR_PORT0: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_ECCERR_ADDR_PORT0));
pr_err("ECCERR_CNT_PORT0: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_ECCERR_COUNT_PORT0));
pr_err("ECC_CHECK_PORT0: 0x%08x\n",
mfdcr(DCRN_DDR34_BASE + DCRN_DDR34_ECC_CHECK_PORT0));
pr_err("MCER0: 0x%08x\n",
mfdcr(DCRN_CW_BASE + DCRN_CW_MCER0));
pr_err("MCER1: 0x%08x\n",
mfdcr(DCRN_CW_BASE + DCRN_CW_MCER1));
pr_err("BESR: 0x%08x\n",
mfdcr(DCRN_PLB6MCIF_BESR0));
pr_err("BEARL: 0x%08x\n",
mfdcr(DCRN_PLB6MCIF_BEARL));
pr_err("BEARH: 0x%08x\n",
mfdcr(DCRN_PLB6MCIF_BEARH));
panic("DDR: Uncorrectable Error\n");
}
static irqreturn_t rst_wrn_handler(int irq, void *data) {
u32 crcs = mfcmu(CMUN_CRCS);
switch (crcs & CRCS_STAT_MASK) {
case CRCS_STAT_CHIP_RST_B:
panic("Received chassis-initiated reset request");
default:
panic("Unknown external reset: CRCS=0x%x", crcs);
}
}
static void node_irq_request(const char *compat, irq_handler_t errirq_handler)
{
struct device_node *np;
unsigned int irq;
int32_t rc;
for_each_compatible_node(np, NULL, compat) {
irq = irq_of_parse_and_map(np, 0);
if (irq == NO_IRQ) {
pr_err("device tree node %s is missing a interrupt",
np->name);
return;
}
rc = request_irq(irq, errirq_handler, 0, np->name, np);
if (rc) {
pr_err("fsp_of_probe: request_irq failed: np=%s rc=%d",
np->full_name, rc);
return;
}
}
}
static void critical_irq_setup(void)
{
node_irq_request(FSP2_CMU_ERR, cmu_err_handler);
node_irq_request(FSP2_BUS_ERR, bus_err_handler);
node_irq_request(FSP2_CONF_ERR, conf_err_handler);
node_irq_request(FSP2_OPBD_ERR, opbd_err_handler);
node_irq_request(FSP2_MCUE, mcue_handler);
node_irq_request(FSP2_RST_WRN, rst_wrn_handler);
}
static int __init fsp2_device_probe(void)
{
of_platform_bus_probe(NULL, fsp2_of_bus, NULL);
@ -105,11 +302,17 @@ static int __init fsp2_probe(void)
return 1;
}
static void __init fsp2_irq_init(void)
{
uic_init_tree();
critical_irq_setup();
}
define_machine(fsp2) {
.name = "FSP-2",
.probe = fsp2_probe,
.progress = udbg_progress,
.init_IRQ = uic_init_tree,
.init_IRQ = fsp2_irq_init,
.get_irq = uic_get_irq,
.restart = ppc4xx_reset_system,
.calibrate_decr = generic_calibrate_decr,