Function dmar_fault_task

freebsd/x86/iommu/intel_fault.c:190–244

}

static void
dmar_fault_task(void *arg, int pending __unused)
{
	struct dmar_unit *unit;
	struct dmar_ctx *ctx;
	uint64_t fault_rec[2];
	int sid, bus, slot, func, faultp;

	unit = arg;
	DMAR_FAULT_LOCK(unit);
	for (;;) {
		faultp = unit->fault_log_tail;
		if (faultp == unit->fault_log_head)
			break;

		fault_rec[0] = unit->fault_log[faultp];
		fault_rec[1] = unit->fault_log[faultp + 1];
		unit->fault_log_tail = dmar_fault_next(unit, faultp);
		DMAR_FAULT_UNLOCK(unit);

		sid = DMAR_FRCD2_SID(fault_rec[1]);
		printf("DMAR%d: ", unit->iommu.unit);
		DMAR_LOCK(unit);
		ctx = dmar_find_ctx_locked(unit, sid);
		if (ctx == NULL) {
			printf("<unknown dev>:");

			/*
			 * Note that the slot and function will not be correct
			 * if ARI is in use, but without a ctx entry we have
			 * no way of knowing whether ARI is in use or not.
			 */
			bus = PCI_RID2BUS(sid);
			slot = PCI_RID2SLOT(sid);
			func = PCI_RID2FUNC(sid);
		} else {
			ctx->context.flags |= IOMMU_CTX_FAULTED;
			ctx->last_fault_rec[0] = fault_rec[0];
			ctx->last_fault_rec[1] = fault_rec[1];
			device_print_prettyname(ctx->context.tag->owner);
			bus = pci_get_bus(ctx->context.tag->owner);
			slot = pci_get_slot(ctx->context.tag->owner);
			func = pci_get_function(ctx->context.tag->owner);
		}
		DMAR_UNLOCK(unit);
		printf(
		    "pci%d:%d:%d sid %x fault acc %x adt 0x%x reason 0x%x "
		    "addr %jx\n",
		    bus, slot, func, sid, DMAR_FRCD2_T(fault_rec[1]),
		    DMAR_FRCD2_AT(fault_rec[1]), DMAR_FRCD2_FR(fault_rec[1]),
		    (uintmax_t)fault_rec[0]);
		DMAR_FAULT_LOCK(unit);
	}
	DMAR_FAULT_UNLOCK(unit);
}

static void
dmar_clear_faults(struct dmar_unit *unit)