static void iommu_print_event()

in amd/iommu.c [524:611]

• 82 lines of code
• 14 McCabe index (conditional complexity)

static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
{
	struct device *dev = iommu->iommu.dev;
	int type, devid, flags, tag;
	volatile u32 *event = __evt;
	int count = 0;
	u64 address;
	u32 pasid;

retry:
	type    = (event[1] >> EVENT_TYPE_SHIFT)  & EVENT_TYPE_MASK;
	devid   = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK;
	pasid   = (event[0] & EVENT_DOMID_MASK_HI) |
		  (event[1] & EVENT_DOMID_MASK_LO);
	flags   = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK;
	address = (u64)(((u64)event[3]) << 32) | event[2];

	if (type == 0) {
		/* Did we hit the erratum? */
		if (++count == LOOP_TIMEOUT) {
			pr_err("No event written to event log\n");
			return;
		}
		udelay(1);
		goto retry;
	}

	if (type == EVENT_TYPE_IO_FAULT) {
		amd_iommu_report_page_fault(devid, pasid, address, flags);
		return;
	}

	switch (type) {
	case EVENT_TYPE_ILL_DEV:
		dev_err(dev, "Event logged [ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
			PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
			pasid, address, flags);
		dump_dte_entry(devid);
		break;
	case EVENT_TYPE_DEV_TAB_ERR:
		dev_err(dev, "Event logged [DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
			"address=0x%llx flags=0x%04x]\n",
			PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
			address, flags);
		break;
	case EVENT_TYPE_PAGE_TAB_ERR:
		dev_err(dev, "Event logged [PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x pasid=0x%04x address=0x%llx flags=0x%04x]\n",
			PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
			pasid, address, flags);
		break;
	case EVENT_TYPE_ILL_CMD:
		dev_err(dev, "Event logged [ILLEGAL_COMMAND_ERROR address=0x%llx]\n", address);
		dump_command(address);
		break;
	case EVENT_TYPE_CMD_HARD_ERR:
		dev_err(dev, "Event logged [COMMAND_HARDWARE_ERROR address=0x%llx flags=0x%04x]\n",
			address, flags);
		break;
	case EVENT_TYPE_IOTLB_INV_TO:
		dev_err(dev, "Event logged [IOTLB_INV_TIMEOUT device=%02x:%02x.%x address=0x%llx]\n",
			PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
			address);
		break;
	case EVENT_TYPE_INV_DEV_REQ:
		dev_err(dev, "Event logged [INVALID_DEVICE_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
			PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
			pasid, address, flags);
		break;
	case EVENT_TYPE_RMP_FAULT:
		amd_iommu_report_rmp_fault(event);
		break;
	case EVENT_TYPE_RMP_HW_ERR:
		amd_iommu_report_rmp_hw_error(event);
		break;
	case EVENT_TYPE_INV_PPR_REQ:
		pasid = PPR_PASID(*((u64 *)__evt));
		tag = event[1] & 0x03FF;
		dev_err(dev, "Event logged [INVALID_PPR_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x tag=0x%03x]\n",
			PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
			pasid, address, flags, tag);
		break;
	default:
		dev_err(dev, "Event logged [UNKNOWN event[0]=0x%08x event[1]=0x%08x event[2]=0x%08x event[3]=0x%08x\n",
			event[0], event[1], event[2], event[3]);
	}

	memset(__evt, 0, 4 * sizeof(u32));
}