[PATCH v2 2/2] EDAC/altera: Check previous DDR DBE during driver probe

From: niravkumar . l . rabara
Date: Wed May 03 2023 - 06:19:03 EST


From: Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>

Add DDR DBE check during driver probe to notify user if previous
reboot cause by DDR DBE and print DBE error related information.

Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@xxxxxxxxx>
---
drivers/edac/altera_edac.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 8b31cd54bdb6..398a49a3eb89 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -2159,6 +2159,7 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
#ifdef CONFIG_64BIT
{
int dberror, err_addr;
+ struct arm_smccc_res result;

edac->panic_notifier.notifier_call = s10_edac_dberr_handler;
atomic_notifier_chain_register(&panic_notifier_list,
@@ -2168,11 +2169,28 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
regmap_read(edac->ecc_mgr_map, S10_SYSMGR_UE_VAL_OFST,
&dberror);
if (dberror) {
- regmap_read(edac->ecc_mgr_map, S10_SYSMGR_UE_ADDR_OFST,
- &err_addr);
- edac_printk(KERN_ERR, EDAC_DEVICE,
- "Previous Boot UE detected[0x%X] @ 0x%X\n",
- dberror, err_addr);
+ /* Bit-31 is set if previous DDR UE happened */
+ if (dberror & (1 << 31)) {
+ /* Read previous DDR UE info */
+ arm_smccc_smc(INTEL_SIP_SMC_READ_SEU_ERR, 0,
+ 0, 0, 0, 0, 0, 0, &result);
+
+ if (!(int)result.a0) {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Previous DDR UE:Count=0x%X,Address=0x%X,ErrorData=0x%X\n"
+ , (unsigned int)result.a1, (unsigned int)result.a2
+ , (unsigned int)result.a3);
+ } else {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "INTEL_SIP_SMC_SEU_ERR_STATUS failed\n");
+ }
+ } else {
+ regmap_read(edac->ecc_mgr_map, S10_SYSMGR_UE_ADDR_OFST,
+ &err_addr);
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Previous Boot UE detected[0x%X] @ 0x%X\n",
+ dberror, err_addr);
+ }
/* Reset the sticky registers */
regmap_write(edac->ecc_mgr_map,
S10_SYSMGR_UE_VAL_OFST, 0);
@@ -2180,6 +2198,7 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
S10_SYSMGR_UE_ADDR_OFST, 0);
}
}
+
#else
edac->db_irq = platform_get_irq(pdev, 1);
if (edac->db_irq < 0)
--
2.25.1