[PATCH] powerpc: split device tree stuff out of iseries/setup.c

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 618 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/iseries/dt.c b/arch/powerpc/platforms/iseries/dt.c
new file mode 100644
index 000000000000..93d4233e73e5
--- /dev/null
+++ b/arch/powerpc/platforms/iseries/dt.c
@@ -0,0 +1,618 @@
+/*
+ *    Copyright (c) 2005-2006 Michael Ellerman, IBM Corporation
+ *
+ *    Description:
+ *      This file contains all the routines to build a flattened device
+ *      tree for a legacy iSeries machine.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/pci_regs.h>
+#include <linux/pci_ids.h>
+#include <linux/threads.h>
+#include <linux/bitops.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/if_ether.h>     /* ETH_ALEN */
+
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/lppaca.h>
+#include <asm/page.h>
+#include <asm/cputable.h>
+#include <asm/abs_addr.h>
+#include <asm/iseries/hv_types.h>
+#include <asm/iseries/hv_lp_config.h>
+#include <asm/iseries/hv_call_xm.h>
+#include <asm/iseries/it_exp_vpd_panel.h>
+#include <asm/udbg.h>
+
+#include "processor_vpd.h"
+#include "call_hpt.h"
+#include "call_pci.h"
+#include "pci.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+struct blob {
+        unsigned char data[PAGE_SIZE * 2];
+        unsigned long next;
+};
+
+struct iseries_flat_dt {
+        struct boot_param_header header;
+        u64 reserve_map[2];
+        struct blob dt;
+        struct blob strings;
+};
+
+static struct iseries_flat_dt iseries_dt;
+
+static void __init dt_init(struct iseries_flat_dt *dt)
+{
+        dt->header.off_mem_rsvmap =
+                offsetof(struct iseries_flat_dt, reserve_map);
+        dt->header.off_dt_struct = offsetof(struct iseries_flat_dt, dt);
+        dt->header.off_dt_strings = offsetof(struct iseries_flat_dt, strings);
+        dt->header.totalsize = sizeof(struct iseries_flat_dt);
+        dt->header.dt_strings_size = sizeof(struct blob);
+
+        /* There is no notion of hardware cpu id on iSeries */
+        dt->header.boot_cpuid_phys = smp_processor_id();
+
+        dt->dt.next = (unsigned long)&dt->dt.data;
+        dt->strings.next = (unsigned long)&dt->strings.data;
+
+        dt->header.magic = OF_DT_HEADER;
+        dt->header.version = 0x10;
+        dt->header.last_comp_version = 0x10;
+
+        dt->reserve_map[0] = 0;
+        dt->reserve_map[1] = 0;
+}
+
+static void __init dt_check_blob(struct blob *b)
+{
+        if (b->next >= (unsigned long)&b->next) {
+                DBG("Ran out of space in flat device tree blob!\n");
+                BUG();
+        }
+}
+
+static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
+{
+        *((u32*)dt->dt.next) = value;
+        dt->dt.next += sizeof(u32);
+
+        dt_check_blob(&dt->dt);
+}
+
+#ifdef notyet
+static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
+{
+        *((u64*)dt->dt.next) = value;
+        dt->dt.next += sizeof(u64);
+
+        dt_check_blob(&dt->dt);
+}
+#endif
+
+static unsigned long __init dt_push_bytes(struct blob *blob, char *data, int len)
+{
+        unsigned long start = blob->next - (unsigned long)blob->data;
+
+        memcpy((char *)blob->next, data, len);
+        blob->next = _ALIGN(blob->next + len, 4);
+
+        dt_check_blob(blob);
+
+        return start;
+}
+
+static void __init dt_start_node(struct iseries_flat_dt *dt, char *name)
+{
+        dt_push_u32(dt, OF_DT_BEGIN_NODE);
+        dt_push_bytes(&dt->dt, name, strlen(name) + 1);
+}
+
+#define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
+
+static void __init dt_prop(struct iseries_flat_dt *dt, char *name,
+                char *data, int len)
+{
+        unsigned long offset;
+
+        dt_push_u32(dt, OF_DT_PROP);
+
+        /* Length of the data */
+        dt_push_u32(dt, len);
+
+        /* Put the property name in the string blob. */
+        offset = dt_push_bytes(&dt->strings, name, strlen(name) + 1);
+
+        /* The offset of the properties name in the string blob. */
+        dt_push_u32(dt, (u32)offset);
+
+        /* The actual data. */
+        dt_push_bytes(&dt->dt, data, len);
+}
+
+static void __init dt_prop_str(struct iseries_flat_dt *dt, char *name,
+                char *data)
+{
+        dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
+}
+
+static void __init dt_prop_u32(struct iseries_flat_dt *dt, char *name, u32 data)
+{
+        dt_prop(dt, name, (char *)&data, sizeof(u32));
+}
+
+static void __init dt_prop_u64(struct iseries_flat_dt *dt, char *name, u64 data)
+{
+        dt_prop(dt, name, (char *)&data, sizeof(u64));
+}
+
+static void __init dt_prop_u64_list(struct iseries_flat_dt *dt, char *name,
+                u64 *data, int n)
+{
+        dt_prop(dt, name, (char *)data, sizeof(u64) * n);
+}
+
+static void __init dt_prop_u32_list(struct iseries_flat_dt *dt, char *name,
+                u32 *data, int n)
+{
+        dt_prop(dt, name, (char *)data, sizeof(u32) * n);
+}
+
+#ifdef notyet
+static void __init dt_prop_empty(struct iseries_flat_dt *dt, char *name)
+{
+        dt_prop(dt, name, NULL, 0);
+}
+#endif
+
+static void __init dt_cpus(struct iseries_flat_dt *dt)
+{
+        unsigned char buf[32];
+        unsigned char *p;
+        unsigned int i, index;
+        struct IoHriProcessorVpd *d;
+        u32 pft_size[2];
+
+        /* yuck */
+        snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
+        p = strchr(buf, ' ');
+        if (!p) p = buf + strlen(buf);
+
+        dt_start_node(dt, "cpus");
+        dt_prop_u32(dt, "#address-cells", 1);
+        dt_prop_u32(dt, "#size-cells", 0);
+
+        pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
+        pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
+
+        for (i = 0; i < NR_CPUS; i++) {
+                if (lppaca[i].dyn_proc_status >= 2)
+                        continue;
+
+                snprintf(p, 32 - (p - buf), "@%d", i);
+                dt_start_node(dt, buf);
+
+                dt_prop_str(dt, "device_type", "cpu");
+
+                index = lppaca[i].dyn_hv_phys_proc_index;
+                d = &xIoHriProcessorVpd[index];
+
+                dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
+                dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
+
+                dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
+                dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
+
+                /* magic conversions to Hz copied from old code */
+                dt_prop_u32(dt, "clock-frequency",
+                        ((1UL << 34) * 1000000) / d->xProcFreq);
+                dt_prop_u32(dt, "timebase-frequency",
+                        ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
+
+                dt_prop_u32(dt, "reg", i);
+
+                dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
+
+                dt_end_node(dt);
+        }
+
+        dt_end_node(dt);
+}
+
+static void __init dt_model(struct iseries_flat_dt *dt)
+{
+        char buf[16] = "IBM,";
+
+        /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
+        strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
+        strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
+        buf[11] = '\0';
+        dt_prop_str(dt, "system-id", buf);
+
+        /* "IBM," + machineType[0:4] */
+        strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
+        buf[8] = '\0';
+        dt_prop_str(dt, "model", buf);
+
+        dt_prop_str(dt, "compatible", "IBM,iSeries");
+}
+
+static void __init dt_vdevices(struct iseries_flat_dt *dt)
+{
+        u32 reg = 0;
+        HvLpIndexMap vlan_map;
+        int i;
+        char buf[32];
+
+        dt_start_node(dt, "vdevice");
+        dt_prop_str(dt, "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);
+
+        snprintf(buf, sizeof(buf), "vty@%08x", reg);
+        dt_start_node(dt, buf);
+        dt_prop_str(dt, "device_type", "serial");
+        dt_prop_u32(dt, "reg", reg);
+        dt_end_node(dt);
+        reg++;
+
+        snprintf(buf, sizeof(buf), "v-scsi@%08x", reg);
+        dt_start_node(dt, buf);
+        dt_prop_str(dt, "device_type", "vscsi");
+        dt_prop_str(dt, "compatible", "IBM,v-scsi");
+        dt_prop_u32(dt, "reg", reg);
+        dt_end_node(dt);
+        reg++;
+
+        vlan_map = HvLpConfig_getVirtualLanIndexMap();
+        for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
+                unsigned char mac_addr[ETH_ALEN];
+
+                if ((vlan_map & (0x8000 >> i)) == 0)
+                        continue;
+                snprintf(buf, 32, "l-lan@%08x", reg + i);
+                dt_start_node(dt, buf);
+                dt_prop_str(dt, "device_type", "network");
+                dt_prop_str(dt, "compatible", "IBM,iSeries-l-lan");
+                dt_prop_u32(dt, "reg", reg + i);
+                dt_prop_u32(dt, "linux,unit_address", i);
+
+                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);
+        }
+        reg += HVMAXARCHITECTEDVIRTUALLANS;
+
+        for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++) {
+                snprintf(buf, 32, "viodasd@%08x", reg + i);
+                dt_start_node(dt, buf);
+                dt_prop_str(dt, "device_type", "block");
+                dt_prop_str(dt, "compatible", "IBM,iSeries-viodasd");
+                dt_prop_u32(dt, "reg", reg + i);
+                dt_prop_u32(dt, "linux,unit_address", i);
+                dt_end_node(dt);
+        }
+        reg += HVMAXARCHITECTEDVIRTUALDISKS;
+        for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++) {
+                snprintf(buf, 32, "viocd@%08x", reg + i);
+                dt_start_node(dt, buf);
+                dt_prop_str(dt, "device_type", "block");
+                dt_prop_str(dt, "compatible", "IBM,iSeries-viocd");
+                dt_prop_u32(dt, "reg", reg + i);
+                dt_prop_u32(dt, "linux,unit_address", i);
+                dt_end_node(dt);
+        }
+        reg += HVMAXARCHITECTEDVIRTUALCDROMS;
+        for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++) {
+                snprintf(buf, 32, "viotape@%08x", reg + i);
+                dt_start_node(dt, buf);
+                dt_prop_str(dt, "device_type", "byte");
+                dt_prop_str(dt, "compatible", "IBM,iSeries-viotape");
+                dt_prop_u32(dt, "reg", reg + i);
+                dt_prop_u32(dt, "linux,unit_address", i);
+                dt_end_node(dt);
+        }
+
+        dt_end_node(dt);
+}
+
+struct pci_class_name {
+        u16 code;
+        char *name;
+        char *type;
+};
+
+static struct pci_class_name __initdata pci_class_name[] = {
+        { PCI_CLASS_NETWORK_ETHERNET, "ethernet", "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)
+                                        printk(KERN_DEBUG
+                                                "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) {
+                                printk(KERN_DEBUG
+                                        "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) {
+                                printk(KERN_DEBUG
+                                        "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) {
+                                printk(KERN_DEBUG
+                                        "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)
+                                printk(KERN_DEBUG "connectBusUnit(%x, %x, %x) "
+                                                "== %x\n",
+                                                bus, sub_bus, agent_id, ret);
+                        continue;
+                }
+                printk("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;
+                printk("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
+                        printk("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)
+                                printk(KERN_DEBUG "getDeviceInfo(%x, %x, %x) "
+                                                "== %x\n",
+                                                bus, sub_bus, id_sel, err);
+                        continue;
+                }
+                if (dev_info.deviceType != HvCallPci_NodeDevice) {
+                        printk(KERN_DEBUG "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)
+                                printk(KERN_ERR "Unexpected Return on Probe"
+                                                "(0x%02X): 0x%04X", bus, err);
+                        continue;
+                }
+                printk("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", "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++;
+        }
+}
+
+void * __init build_flat_dt(unsigned long phys_mem_size)
+{
+        u64 tmp[2];
+
+        dt_init(&iseries_dt);
+
+        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, "name", "memory");
+        dt_prop_str(&iseries_dt, "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_end_node(&iseries_dt);
+
+        dt_cpus(&iseries_dt);
+
+        dt_vdevices(&iseries_dt);
+        dt_pci_devices(&iseries_dt);
+
+        dt_end_node(&iseries_dt);
+
+        dt_push_u32(&iseries_dt, OF_DT_END);
+
+        return &iseries_dt;
+}