drivers/acpi/nfit/mce.c

Source file repositories/reference/linux-study-clean/drivers/acpi/nfit/mce.c

File Facts

System
Linux kernel
Corpus path
drivers/acpi/nfit/mce.c
Extension
.c
Size
2708 bytes
Lines
101
Domain
Driver Families
Bucket
drivers/acpi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
			struct acpi_nfit_system_address *spa = nfit_spa->spa;

			if (nfit_spa_type(spa) != NFIT_SPA_PM)
				continue;
			/* find the spa that covers the mce addr */
			if (spa->address > mce->addr)
				continue;
			if ((spa->address + spa->length - 1) < mce->addr)
				continue;
			found_match = 1;
			dev_dbg(dev, "addr in SPA %d (0x%llx, 0x%llx)\n",
				spa->range_index, spa->address, spa->length);
			/*
			 * We can break at the first match because we're going
			 * to rescan all the SPA ranges. There shouldn't be any
			 * aliasing anyway.
			 */
			break;
		}
		mutex_unlock(&acpi_desc->init_mutex);

		if (!found_match)
			continue;

		/* If this fails due to an -ENOMEM, there is little we can do */
		nvdimm_bus_add_badrange(acpi_desc->nvdimm_bus,
				ALIGN_DOWN(mce->addr, align), align);
		nvdimm_region_notify(nfit_spa->nd_region,
				NVDIMM_REVALIDATE_POISON);

		if (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON) {
			/*
			 * We can ignore an -EBUSY here because if an ARS is
			 * already in progress, just let that be the last
			 * authoritative one
			 */
			acpi_nfit_ars_rescan(acpi_desc, 0);
		}
		mce->kflags |= MCE_HANDLED_NFIT;
		break;
	}

	mutex_unlock(&acpi_desc_lock);
	return NOTIFY_DONE;
}

static struct notifier_block nfit_mce_dec = {
	.notifier_call	= nfit_handle_mce,
	.priority	= MCE_PRIO_NFIT,
};

void nfit_mce_register(void)
{
	mce_register_decode_chain(&nfit_mce_dec);
}

void nfit_mce_unregister(void)
{
	mce_unregister_decode_chain(&nfit_mce_dec);
}

Annotation

Implementation Notes