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Message-ID: <20241101204211.414664-3-orange@aiven.io>
Date: Fri, 1 Nov 2024 20:41:14 +0000
From: Orange Kao <orange@...en.io>
To: tony.luck@...el.com,
qiuxu.zhuo@...el.com
Cc: bp@...en8.de,
james.morse@....com,
orange@...sy.org,
linux-edac@...r.kernel.org,
linux-kernel@...r.kernel.org,
mchehab@...nel.org,
rric@...nel.org,
Orange Kao <orange@...en.io>
Subject: [PATCH 2/2] EDAC/igen6: Add polling support
I have a PC with Intel N100 (with PCI device 8086:461c, DID_ADL_N_SKU4)
but interrupt does not seems to work, even with the following
configuration in BIOS. I am not sure if this is caused by a BIOS bug or
not.
In-Band ECC Support: Enabled
In-Band ECC Operation Mode: 2 (make all requests protected and
ignore range checks)
IBECC Error Injection Control: Inject Correctable Error on insertion
counter
Error Injaction Insertion Count: 251658240 (0xf000000)
This commit tried to add polling support.
---
drivers/edac/igen6_edac.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c
index 07dacf8c10be..5027070410a5 100644
--- a/drivers/edac/igen6_edac.c
+++ b/drivers/edac/igen6_edac.c
@@ -1170,6 +1170,19 @@ static int igen6_pci_setup(struct pci_dev *pdev, u64 *mchbar)
return -ENODEV;
}
+static void igen6_check(struct mem_ctl_info *mci)
+{
+ struct igen6_imc *imc = mci->pvt_info;
+
+ /* errsts_clear() isn't NMI-safe. Delay it in the IRQ context */
+ u64 ecclog = ecclog_read_and_clear(imc);
+ if (!ecclog)
+ return;
+ if (!ecclog_gen_pool_add(imc->mc, ecclog))
+ irq_work_queue(&ecclog_irq_work);
+
+}
+
static int igen6_register_mci(int mc, u64 mchbar, struct pci_dev *pdev)
{
struct edac_mc_layer layers[2];
@@ -1211,6 +1224,9 @@ static int igen6_register_mci(int mc, u64 mchbar, struct pci_dev *pdev)
mci->edac_cap = EDAC_FLAG_SECDED;
mci->mod_name = EDAC_MOD_STR;
mci->dev_name = pci_name(pdev);
+ if (edac_op_state == EDAC_OPSTATE_POLL) {
+ mci->edac_check = igen6_check;
+ }
mci->pvt_info = &igen6_pvt->imc[mc];
imc = mci->pvt_info;
@@ -1450,7 +1466,9 @@ static int __init igen6_init(void)
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
- edac_op_state = EDAC_OPSTATE_NMI;
+ if (edac_op_state == EDAC_OPSTATE_INVAL) {
+ edac_op_state = EDAC_OPSTATE_NMI;
+ }
rc = pci_register_driver(&igen6_driver);
if (rc)
@@ -1474,3 +1492,6 @@ module_exit(igen6_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Qiuxu Zhuo");
MODULE_DESCRIPTION("MC Driver for Intel client SoC using In-Band ECC");
+
+module_param(edac_op_state, int, 0444);
+MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI. Default=1");
--
2.47.0
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