dt.c

linux 内核源代码

		dt_prop_str(dt, "compatible", compat);
	dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
	if (unit >= 0)
		dt_prop_u32(dt, "linux,unit_address", unit);
	if (end)
		dt_end_node(dt);
}

static void __init dt_vdevices(struct iseries_flat_dt *dt)
{
	u32 reg = 0;
	HvLpIndexMap vlan_map;
	int i;

	dt_start_node(dt, "vdevice");
	dt_prop_str(dt, "device_type", device_type_vdevice);
	dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
	dt_prop_u32(dt, "#address-cells", 1);
	dt_prop_u32(dt, "#size-cells", 0);

	dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
			"IBM,iSeries-vty", 1);
	reg++;

	dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
			"IBM,v-scsi", 1);
	reg++;

	vlan_map = HvLpConfig_getVirtualLanIndexMap();
	for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
		unsigned char mac_addr[ETH_ALEN];

		if ((vlan_map & (0x8000 >> i)) == 0)
			continue;
		dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
				"IBM,iSeries-l-lan", 0);
		mac_addr[0] = 0x02;
		mac_addr[1] = 0x01;
		mac_addr[2] = 0xff;
		mac_addr[3] = i;
		mac_addr[4] = 0xff;
		mac_addr[5] = HvLpConfig_getLpIndex_outline();
		dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
		dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
		dt_prop_u32(dt, "max-frame-size", 9000);
		dt_prop_u32(dt, "address-bits", 48);

		dt_end_node(dt);
	}

	dt_end_node(dt);
}

struct pci_class_name {
	u16 code;
	const char *name;
	const char *type;
};

static struct pci_class_name __initdata pci_class_name[] = {
	{ PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
};

static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
{
	struct pci_class_name *cp;

	for (cp = pci_class_name;
			cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
		if (cp->code == class_code)
			return cp;
	return NULL;
}

/*
 * This assumes that the node slot is always on the primary bus!
 */
static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
		HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
{
	HvSubBusNumber sub_bus = bridge_info->subBusNumber;
	u16 vendor_id;
	u16 device_id;
	u32 class_id;
	int err;
	char buf[32];
	u32 reg[5];
	int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
	int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
	HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
	u8 devfn;
	struct pci_class_name *cp;

	/*
	 * Connect all functions of any device found.
	 */
	for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
		for (function = 0; function < 8; function++) {
			HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
					function);
			err = HvCallXm_connectBusUnit(bus, sub_bus,
					agent_id, 0);
			if (err) {
				if (err != 0x302)
					DBG("connectBusUnit(%x, %x, %x) %x\n",
						bus, sub_bus, agent_id, err);
				continue;
			}

			err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
					PCI_VENDOR_ID, &vendor_id);
			if (err) {
				DBG("ReadVendor(%x, %x, %x) %x\n",
					bus, sub_bus, agent_id, err);
				continue;
			}
			err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
					PCI_DEVICE_ID, &device_id);
			if (err) {
				DBG("ReadDevice(%x, %x, %x) %x\n",
					bus, sub_bus, agent_id, err);
				continue;
			}
			err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
					PCI_CLASS_REVISION , &class_id);
			if (err) {
				DBG("ReadClass(%x, %x, %x) %x\n",
					bus, sub_bus, agent_id, err);
				continue;
			}

			devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
					function);
			cp = dt_find_pci_class_name(class_id >> 16);
			if (cp && cp->name)
				strncpy(buf, cp->name, sizeof(buf) - 1);
			else
				snprintf(buf, sizeof(buf), "pci%x,%x",
						vendor_id, device_id);
			buf[sizeof(buf) - 1] = '\0';
			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
					"@%x", PCI_SLOT(devfn));
			buf[sizeof(buf) - 1] = '\0';
			if (function != 0)
				snprintf(buf + strlen(buf),
					sizeof(buf) - strlen(buf),
					",%x", function);
			dt_start_node(dt, buf);
			reg[0] = (bus << 16) | (devfn << 8);
			reg[1] = 0;
			reg[2] = 0;
			reg[3] = 0;
			reg[4] = 0;
			dt_prop_u32_list(dt, "reg", reg, 5);
			if (cp && (cp->type || cp->name))
				dt_prop_str(dt, "device_type",
					cp->type ? cp->type : cp->name);
			dt_prop_u32(dt, "vendor-id", vendor_id);
			dt_prop_u32(dt, "device-id", device_id);
			dt_prop_u32(dt, "class-code", class_id >> 8);
			dt_prop_u32(dt, "revision-id", class_id & 0xff);
			dt_prop_u32(dt, "linux,subbus", sub_bus);
			dt_prop_u32(dt, "linux,agent-id", agent_id);
			dt_prop_u32(dt, "linux,logical-slot-number",
					bridge_info->logicalSlotNumber);
			dt_end_node(dt);

		}
	}
}

static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
		HvSubBusNumber sub_bus, int id_sel)
{
	struct HvCallPci_BridgeInfo bridge_info;
	HvAgentId agent_id;
	int function;
	int ret;

	/* Note: hvSubBus and irq is always be 0 at this level! */
	for (function = 0; function < 8; ++function) {
		agent_id = ISERIES_PCI_AGENTID(id_sel, function);
		ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
		if (ret != 0) {
			if (ret != 0xb)
				DBG("connectBusUnit(%x, %x, %x) %x\n",
						bus, sub_bus, agent_id, ret);
			continue;
		}
		DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
				bus, id_sel, function, agent_id);
		ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
				iseries_hv_addr(&bridge_info),
				sizeof(struct HvCallPci_BridgeInfo));
		if (ret != 0)
			continue;
		DBG("bridge info: type %x subbus %x "
			"maxAgents %x maxsubbus %x logslot %x\n",
			bridge_info.busUnitInfo.deviceType,
			bridge_info.subBusNumber,
			bridge_info.maxAgents,
			bridge_info.maxSubBusNumber,
			bridge_info.logicalSlotNumber);
		if (bridge_info.busUnitInfo.deviceType ==
				HvCallPci_BridgeDevice)
			scan_bridge_slot(dt, bus, &bridge_info);
		else
			DBG("PCI: Invalid Bridge Configuration(0x%02X)",
				bridge_info.busUnitInfo.deviceType);
	}
}

static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
{
	struct HvCallPci_DeviceInfo dev_info;
	const HvSubBusNumber sub_bus = 0;	/* EADs is always 0. */
	int err;
	int id_sel;
	const int max_agents = 8;

	/*
	 * Probe for EADs Bridges
	 */
	for (id_sel = 1; id_sel < max_agents; ++id_sel) {
		err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
				iseries_hv_addr(&dev_info),
				sizeof(struct HvCallPci_DeviceInfo));
		if (err) {
			if (err != 0x302)
				DBG("getDeviceInfo(%x, %x, %x) %x\n",
						bus, sub_bus, id_sel, err);
			continue;
		}
		if (dev_info.deviceType != HvCallPci_NodeDevice) {
			DBG("PCI: Invalid System Configuration"
					"(0x%02X) for bus 0x%02x id 0x%02x.\n",
					dev_info.deviceType, bus, id_sel);
			continue;
		}
		scan_bridge(dt, bus, sub_bus, id_sel);
	}
}

static void __init dt_pci_devices(struct iseries_flat_dt *dt)
{
	HvBusNumber bus;
	char buf[32];
	u32 buses[2];
	int phb_num = 0;

	/* Check all possible buses. */
	for (bus = 0; bus < 256; bus++) {
		int err = HvCallXm_testBus(bus);

		if (err) {
			/*
			 * Check for Unexpected Return code, a clue that
			 * something has gone wrong.
			 */
			if (err != 0x0301)
				DBG("Unexpected Return on Probe(0x%02X) "
						"0x%04X\n", bus, err);
			continue;
		}
		DBG("bus %d appears to exist\n", bus);
		snprintf(buf, 32, "pci@%d", phb_num);
		dt_start_node(dt, buf);
		dt_prop_str(dt, "device_type", device_type_pci);
		dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
		dt_prop_u32(dt, "#address-cells", 3);
		dt_prop_u32(dt, "#size-cells", 2);
		buses[0] = buses[1] = bus;
		dt_prop_u32_list(dt, "bus-range", buses, 2);
		scan_phb(dt, bus);
		dt_end_node(dt);
		phb_num++;
	}
}

static void dt_finish(struct iseries_flat_dt *dt)
{
	dt_push_u32(dt, OF_DT_END);
	dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
	klimit = ALIGN((unsigned long)dt_data, 8);
}

void * __init build_flat_dt(unsigned long phys_mem_size)
{
	struct iseries_flat_dt *iseries_dt;
	u64 tmp[2];

	iseries_dt = dt_init();

	dt_start_node(iseries_dt, "");

	dt_prop_u32(iseries_dt, "#address-cells", 2);
	dt_prop_u32(iseries_dt, "#size-cells", 2);
	dt_model(iseries_dt);

	/* /memory */
	dt_start_node(iseries_dt, "memory@0");
	dt_prop_str(iseries_dt, "device_type", device_type_memory);
	tmp[0] = 0;
	tmp[1] = phys_mem_size;
	dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
	dt_end_node(iseries_dt);

	/* /chosen */
	dt_start_node(iseries_dt, "chosen");
	dt_prop_str(iseries_dt, "bootargs", cmd_line);
	dt_initrd(iseries_dt);
	dt_end_node(iseries_dt);

	dt_cpus(iseries_dt);

	dt_vdevices(iseries_dt);
	dt_pci_devices(iseries_dt);

	dt_end_node(iseries_dt);

	dt_finish(iseries_dt);

	return iseries_dt;
}