2 * Copyright (c) 2005-2006 Michael Ellerman, IBM Corporation
5 * This file contains all the routines to build a flattened device
6 * tree for a legacy iSeries machine.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
16 #include <linux/types.h>
17 #include <linux/init.h>
18 #include <linux/pci.h>
19 #include <linux/pci_regs.h>
20 #include <linux/pci_ids.h>
21 #include <linux/threads.h>
22 #include <linux/bitops.h>
23 #include <linux/string.h>
24 #include <linux/kernel.h>
25 #include <linux/if_ether.h> /* ETH_ALEN */
27 #include <asm/machdep.h>
29 #include <asm/lppaca.h>
30 #include <asm/cputable.h>
31 #include <asm/abs_addr.h>
32 #include <asm/system.h>
33 #include <asm/iseries/hv_types.h>
34 #include <asm/iseries/hv_lp_config.h>
35 #include <asm/iseries/hv_call_xm.h>
36 #include <asm/iseries/it_exp_vpd_panel.h>
39 #include "processor_vpd.h"
45 #define DBG(fmt...) udbg_printf(fmt)
51 * These are created by the linker script at the start and end
52 * of the section containing all the strings from this file.
54 extern char __dt_strings_start[];
55 extern char __dt_strings_end[];
57 struct iseries_flat_dt {
58 struct boot_param_header header;
62 static void * __initdata dt_data;
65 * Putting these strings here keeps them out of the section
66 * that we rename to .dt_strings using objcopy and capture
67 * for the strings blob of the flattened device tree.
69 static char __initdata device_type_cpu[] = "cpu";
70 static char __initdata device_type_memory[] = "memory";
71 static char __initdata device_type_serial[] = "serial";
72 static char __initdata device_type_network[] = "network";
73 static char __initdata device_type_block[] = "block";
74 static char __initdata device_type_byte[] = "byte";
75 static char __initdata device_type_pci[] = "pci";
76 static char __initdata device_type_vdevice[] = "vdevice";
77 static char __initdata device_type_vscsi[] = "vscsi";
79 static struct iseries_flat_dt * __init dt_init(void)
81 struct iseries_flat_dt *dt;
82 unsigned long str_len;
84 str_len = __dt_strings_end - __dt_strings_start;
85 dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
86 dt->header.off_mem_rsvmap =
87 offsetof(struct iseries_flat_dt, reserve_map);
88 dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
89 dt->header.off_dt_struct = dt->header.off_dt_strings
91 dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
92 dt->header.dt_strings_size = str_len;
94 /* There is no notion of hardware cpu id on iSeries */
95 dt->header.boot_cpuid_phys = smp_processor_id();
97 memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
100 dt->header.magic = OF_DT_HEADER;
101 dt->header.version = 0x10;
102 dt->header.last_comp_version = 0x10;
104 dt->reserve_map[0] = 0;
105 dt->reserve_map[1] = 0;
110 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
112 *((u32 *)dt_data) = value;
113 dt_data += sizeof(u32);
117 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
119 *((u64 *)dt_data) = value;
120 dt_data += sizeof(u64);
124 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
127 memcpy(dt_data, data, len);
128 dt_data += ALIGN(len, 4);
131 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
133 dt_push_u32(dt, OF_DT_BEGIN_NODE);
134 dt_push_bytes(dt, name, strlen(name) + 1);
137 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
139 static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
140 const void *data, int len)
142 unsigned long offset;
144 dt_push_u32(dt, OF_DT_PROP);
146 /* Length of the data */
147 dt_push_u32(dt, len);
149 offset = name - __dt_strings_start;
151 /* The offset of the properties name in the string blob. */
152 dt_push_u32(dt, (u32)offset);
154 /* The actual data. */
155 dt_push_bytes(dt, data, len);
158 static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
161 dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
164 static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
167 dt_prop(dt, name, &data, sizeof(u32));
171 static void __init dt_prop_u64(struct iseries_flat_dt *dt, const char *name,
174 dt_prop(dt, name, &data, sizeof(u64));
178 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
179 const char *name, u64 *data, int n)
181 dt_prop(dt, name, data, sizeof(u64) * n);
184 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
185 const char *name, u32 *data, int n)
187 dt_prop(dt, name, data, sizeof(u32) * n);
191 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
193 dt_prop(dt, name, NULL, 0);
197 static void __init dt_cpus(struct iseries_flat_dt *dt)
199 unsigned char buf[32];
201 unsigned int i, index;
202 struct IoHriProcessorVpd *d;
206 snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
207 p = strchr(buf, ' ');
208 if (!p) p = buf + strlen(buf);
210 dt_start_node(dt, "cpus");
211 dt_prop_u32(dt, "#address-cells", 1);
212 dt_prop_u32(dt, "#size-cells", 0);
214 pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA */
215 pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
217 for (i = 0; i < NR_CPUS; i++) {
218 if (lppaca[i].dyn_proc_status >= 2)
221 snprintf(p, 32 - (p - buf), "@%d", i);
222 dt_start_node(dt, buf);
224 dt_prop_str(dt, "device_type", device_type_cpu);
226 index = lppaca[i].dyn_hv_phys_proc_index;
227 d = &xIoHriProcessorVpd[index];
229 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
230 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
232 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
233 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
235 /* magic conversions to Hz copied from old code */
236 dt_prop_u32(dt, "clock-frequency",
237 ((1UL << 34) * 1000000) / d->xProcFreq);
238 dt_prop_u32(dt, "timebase-frequency",
239 ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
241 dt_prop_u32(dt, "reg", i);
243 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
251 static void __init dt_model(struct iseries_flat_dt *dt)
253 char buf[16] = "IBM,";
255 /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
256 /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
257 strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
258 strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
260 dt_prop_str(dt, "system-id", buf);
262 /* "IBM," + machineType[0:4] */
263 strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
265 dt_prop_str(dt, "model", buf);
267 dt_prop_str(dt, "compatible", "IBM,iSeries");
268 dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
271 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
272 const char *name, u32 reg, int unit,
273 const char *type, const char *compat, int end)
277 snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
278 dt_start_node(dt, buf);
279 dt_prop_str(dt, "device_type", type);
281 dt_prop_str(dt, "compatible", compat);
282 dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
284 dt_prop_u32(dt, "linux,unit_address", unit);
289 static void __init dt_vdevices(struct iseries_flat_dt *dt)
292 HvLpIndexMap vlan_map;
295 dt_start_node(dt, "vdevice");
296 dt_prop_str(dt, "device_type", device_type_vdevice);
297 dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
298 dt_prop_u32(dt, "#address-cells", 1);
299 dt_prop_u32(dt, "#size-cells", 0);
301 dt_do_vdevice(dt, "vty", reg, -1, device_type_serial, NULL, 1);
304 dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
308 vlan_map = HvLpConfig_getVirtualLanIndexMap();
309 for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
310 unsigned char mac_addr[ETH_ALEN];
312 if ((vlan_map & (0x8000 >> i)) == 0)
314 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
315 "IBM,iSeries-l-lan", 0);
321 mac_addr[5] = HvLpConfig_getLpIndex_outline();
322 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
323 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
324 dt_prop_u32(dt, "max-frame-size", 9000);
325 dt_prop_u32(dt, "address-bits", 48);
329 reg += HVMAXARCHITECTEDVIRTUALLANS;
331 for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
332 dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
333 "IBM,iSeries-viodasd", 1);
334 reg += HVMAXARCHITECTEDVIRTUALDISKS;
336 for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
337 dt_do_vdevice(dt, "viocd", reg, i, device_type_block,
338 "IBM,iSeries-viocd", 1);
339 reg += HVMAXARCHITECTEDVIRTUALCDROMS;
341 for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
342 dt_do_vdevice(dt, "viotape", reg, i, device_type_byte,
343 "IBM,iSeries-viotape", 1);
348 struct pci_class_name {
354 static struct pci_class_name __initdata pci_class_name[] = {
355 { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
358 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
360 struct pci_class_name *cp;
362 for (cp = pci_class_name;
363 cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
364 if (cp->code == class_code)
370 * This assumes that the node slot is always on the primary bus!
372 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
373 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
375 HvSubBusNumber sub_bus = bridge_info->subBusNumber;
382 int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
383 int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
384 HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
386 struct pci_class_name *cp;
389 * Connect all functions of any device found.
391 for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
392 for (function = 0; function < 8; function++) {
393 HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
395 err = HvCallXm_connectBusUnit(bus, sub_bus,
399 DBG("connectBusUnit(%x, %x, %x) %x\n",
400 bus, sub_bus, agent_id, err);
404 err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
405 PCI_VENDOR_ID, &vendor_id);
407 DBG("ReadVendor(%x, %x, %x) %x\n",
408 bus, sub_bus, agent_id, err);
411 err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
412 PCI_DEVICE_ID, &device_id);
414 DBG("ReadDevice(%x, %x, %x) %x\n",
415 bus, sub_bus, agent_id, err);
418 err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
419 PCI_CLASS_REVISION , &class_id);
421 DBG("ReadClass(%x, %x, %x) %x\n",
422 bus, sub_bus, agent_id, err);
426 devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
428 cp = dt_find_pci_class_name(class_id >> 16);
430 strncpy(buf, cp->name, sizeof(buf) - 1);
432 snprintf(buf, sizeof(buf), "pci%x,%x",
433 vendor_id, device_id);
434 buf[sizeof(buf) - 1] = '\0';
435 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
436 "@%x", PCI_SLOT(devfn));
437 buf[sizeof(buf) - 1] = '\0';
439 snprintf(buf + strlen(buf),
440 sizeof(buf) - strlen(buf),
442 dt_start_node(dt, buf);
443 reg[0] = (bus << 16) | (devfn << 8);
448 dt_prop_u32_list(dt, "reg", reg, 5);
449 if (cp && (cp->type || cp->name))
450 dt_prop_str(dt, "device_type",
451 cp->type ? cp->type : cp->name);
452 dt_prop_u32(dt, "vendor-id", vendor_id);
453 dt_prop_u32(dt, "device-id", device_id);
454 dt_prop_u32(dt, "class-code", class_id >> 8);
455 dt_prop_u32(dt, "revision-id", class_id & 0xff);
456 dt_prop_u32(dt, "linux,subbus", sub_bus);
457 dt_prop_u32(dt, "linux,agent-id", agent_id);
458 dt_prop_u32(dt, "linux,logical-slot-number",
459 bridge_info->logicalSlotNumber);
466 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
467 HvSubBusNumber sub_bus, int id_sel)
469 struct HvCallPci_BridgeInfo bridge_info;
474 /* Note: hvSubBus and irq is always be 0 at this level! */
475 for (function = 0; function < 8; ++function) {
476 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
477 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
480 DBG("connectBusUnit(%x, %x, %x) %x\n",
481 bus, sub_bus, agent_id, ret);
484 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
485 bus, id_sel, function, agent_id);
486 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
487 iseries_hv_addr(&bridge_info),
488 sizeof(struct HvCallPci_BridgeInfo));
491 DBG("bridge info: type %x subbus %x "
492 "maxAgents %x maxsubbus %x logslot %x\n",
493 bridge_info.busUnitInfo.deviceType,
494 bridge_info.subBusNumber,
495 bridge_info.maxAgents,
496 bridge_info.maxSubBusNumber,
497 bridge_info.logicalSlotNumber);
498 if (bridge_info.busUnitInfo.deviceType ==
499 HvCallPci_BridgeDevice)
500 scan_bridge_slot(dt, bus, &bridge_info);
502 DBG("PCI: Invalid Bridge Configuration(0x%02X)",
503 bridge_info.busUnitInfo.deviceType);
507 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
509 struct HvCallPci_DeviceInfo dev_info;
510 const HvSubBusNumber sub_bus = 0; /* EADs is always 0. */
513 const int max_agents = 8;
516 * Probe for EADs Bridges
518 for (id_sel = 1; id_sel < max_agents; ++id_sel) {
519 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
520 iseries_hv_addr(&dev_info),
521 sizeof(struct HvCallPci_DeviceInfo));
524 DBG("getDeviceInfo(%x, %x, %x) %x\n",
525 bus, sub_bus, id_sel, err);
528 if (dev_info.deviceType != HvCallPci_NodeDevice) {
529 DBG("PCI: Invalid System Configuration"
530 "(0x%02X) for bus 0x%02x id 0x%02x.\n",
531 dev_info.deviceType, bus, id_sel);
534 scan_bridge(dt, bus, sub_bus, id_sel);
538 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
545 /* Check all possible buses. */
546 for (bus = 0; bus < 256; bus++) {
547 int err = HvCallXm_testBus(bus);
551 * Check for Unexpected Return code, a clue that
552 * something has gone wrong.
555 DBG("Unexpected Return on Probe(0x%02X) "
556 "0x%04X\n", bus, err);
559 DBG("bus %d appears to exist\n", bus);
560 snprintf(buf, 32, "pci@%d", phb_num);
561 dt_start_node(dt, buf);
562 dt_prop_str(dt, "device_type", device_type_pci);
563 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
564 dt_prop_u32(dt, "#address-cells", 3);
565 dt_prop_u32(dt, "#size-cells", 2);
566 buses[0] = buses[1] = bus;
567 dt_prop_u32_list(dt, "bus-range", buses, 2);
574 static void dt_finish(struct iseries_flat_dt *dt)
576 dt_push_u32(dt, OF_DT_END);
577 dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
578 klimit = ALIGN((unsigned long)dt_data, 8);
581 void * __init build_flat_dt(unsigned long phys_mem_size)
583 struct iseries_flat_dt *iseries_dt;
586 iseries_dt = dt_init();
588 dt_start_node(iseries_dt, "");
590 dt_prop_u32(iseries_dt, "#address-cells", 2);
591 dt_prop_u32(iseries_dt, "#size-cells", 2);
592 dt_model(iseries_dt);
595 dt_start_node(iseries_dt, "memory@0");
596 dt_prop_str(iseries_dt, "device_type", device_type_memory);
598 tmp[1] = phys_mem_size;
599 dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
600 dt_end_node(iseries_dt);
603 dt_start_node(iseries_dt, "chosen");
604 dt_prop_str(iseries_dt, "bootargs", cmd_line);
605 dt_end_node(iseries_dt);
609 dt_vdevices(iseries_dt);
610 dt_pci_devices(iseries_dt);
612 dt_end_node(iseries_dt);
614 dt_finish(iseries_dt);