2 * Copyright (C) 2005-2006 Michael Ellerman, IBM Corporation
3 * Copyright (C) 2000-2004, IBM Corporation
6 * This file contains all the routines to build a flattened device
7 * tree for a legacy iSeries machine.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
17 #include <linux/types.h>
18 #include <linux/init.h>
19 #include <linux/pci.h>
20 #include <linux/pci_regs.h>
21 #include <linux/pci_ids.h>
22 #include <linux/threads.h>
23 #include <linux/bitops.h>
24 #include <linux/string.h>
25 #include <linux/kernel.h>
26 #include <linux/if_ether.h> /* ETH_ALEN */
28 #include <asm/machdep.h>
30 #include <asm/lppaca.h>
31 #include <asm/cputable.h>
32 #include <asm/abs_addr.h>
33 #include <asm/system.h>
34 #include <asm/iseries/hv_types.h>
35 #include <asm/iseries/hv_lp_config.h>
36 #include <asm/iseries/hv_call_xm.h>
39 #include "processor_vpd.h"
43 #include "it_exp_vpd_panel.h"
47 #define DBG(fmt...) udbg_printf(fmt)
53 * These are created by the linker script at the start and end
54 * of the section containing all the strings from this file.
56 extern char __dt_strings_start
[];
57 extern char __dt_strings_end
[];
59 struct iseries_flat_dt
{
60 struct boot_param_header header
;
64 static void * __initdata dt_data
;
67 * Putting these strings here keeps them out of the section
68 * that we rename to .dt_strings using objcopy and capture
69 * for the strings blob of the flattened device tree.
71 static char __initdata device_type_cpu
[] = "cpu";
72 static char __initdata device_type_memory
[] = "memory";
73 static char __initdata device_type_serial
[] = "serial";
74 static char __initdata device_type_network
[] = "network";
75 static char __initdata device_type_block
[] = "block";
76 static char __initdata device_type_byte
[] = "byte";
77 static char __initdata device_type_pci
[] = "pci";
78 static char __initdata device_type_vdevice
[] = "vdevice";
79 static char __initdata device_type_vscsi
[] = "vscsi";
82 /* EBCDIC to ASCII conversion routines */
84 static unsigned char __init
e2a(unsigned char x
)
88 return x
- 0x81 + 'a';
90 return x
- 0x91 + 'j';
92 return x
- 0xA2 + 's';
94 return x
- 0xC1 + 'A';
96 return x
- 0xD1 + 'J';
98 return x
- 0xE2 + 'S';
100 return x
- 0xF0 + '0';
105 static unsigned char * __init
strne2a(unsigned char *dest
,
106 const unsigned char *src
, size_t n
)
112 for (i
= 0; i
< n
; i
++)
113 dest
[i
] = e2a(src
[i
]);
118 static struct iseries_flat_dt
* __init
dt_init(void)
120 struct iseries_flat_dt
*dt
;
121 unsigned long str_len
;
123 str_len
= __dt_strings_end
- __dt_strings_start
;
124 dt
= (struct iseries_flat_dt
*)ALIGN(klimit
, 8);
125 dt
->header
.off_mem_rsvmap
=
126 offsetof(struct iseries_flat_dt
, reserve_map
);
127 dt
->header
.off_dt_strings
= ALIGN(sizeof(*dt
), 8);
128 dt
->header
.off_dt_struct
= dt
->header
.off_dt_strings
130 dt_data
= (void *)((unsigned long)dt
+ dt
->header
.off_dt_struct
);
131 dt
->header
.dt_strings_size
= str_len
;
133 /* There is no notion of hardware cpu id on iSeries */
134 dt
->header
.boot_cpuid_phys
= smp_processor_id();
136 memcpy((char *)dt
+ dt
->header
.off_dt_strings
, __dt_strings_start
,
139 dt
->header
.magic
= OF_DT_HEADER
;
140 dt
->header
.version
= 0x10;
141 dt
->header
.last_comp_version
= 0x10;
143 dt
->reserve_map
[0] = 0;
144 dt
->reserve_map
[1] = 0;
149 static void __init
dt_push_u32(struct iseries_flat_dt
*dt
, u32 value
)
151 *((u32
*)dt_data
) = value
;
152 dt_data
+= sizeof(u32
);
156 static void __init
dt_push_u64(struct iseries_flat_dt
*dt
, u64 value
)
158 *((u64
*)dt_data
) = value
;
159 dt_data
+= sizeof(u64
);
163 static void __init
dt_push_bytes(struct iseries_flat_dt
*dt
, const char *data
,
166 memcpy(dt_data
, data
, len
);
167 dt_data
+= ALIGN(len
, 4);
170 static void __init
dt_start_node(struct iseries_flat_dt
*dt
, const char *name
)
172 dt_push_u32(dt
, OF_DT_BEGIN_NODE
);
173 dt_push_bytes(dt
, name
, strlen(name
) + 1);
176 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
178 static void __init
dt_prop(struct iseries_flat_dt
*dt
, const char *name
,
179 const void *data
, int len
)
181 unsigned long offset
;
183 dt_push_u32(dt
, OF_DT_PROP
);
185 /* Length of the data */
186 dt_push_u32(dt
, len
);
188 offset
= name
- __dt_strings_start
;
190 /* The offset of the properties name in the string blob. */
191 dt_push_u32(dt
, (u32
)offset
);
193 /* The actual data. */
194 dt_push_bytes(dt
, data
, len
);
197 static void __init
dt_prop_str(struct iseries_flat_dt
*dt
, const char *name
,
200 dt_prop(dt
, name
, data
, strlen(data
) + 1); /* + 1 for NULL */
203 static void __init
dt_prop_u32(struct iseries_flat_dt
*dt
, const char *name
,
206 dt_prop(dt
, name
, &data
, sizeof(u32
));
209 static void __init
dt_prop_u64(struct iseries_flat_dt
*dt
, const char *name
,
212 dt_prop(dt
, name
, &data
, sizeof(u64
));
215 static void __init
dt_prop_u64_list(struct iseries_flat_dt
*dt
,
216 const char *name
, u64
*data
, int n
)
218 dt_prop(dt
, name
, data
, sizeof(u64
) * n
);
221 static void __init
dt_prop_u32_list(struct iseries_flat_dt
*dt
,
222 const char *name
, u32
*data
, int n
)
224 dt_prop(dt
, name
, data
, sizeof(u32
) * n
);
228 static void __init
dt_prop_empty(struct iseries_flat_dt
*dt
, const char *name
)
230 dt_prop(dt
, name
, NULL
, 0);
234 static void __init
dt_cpus(struct iseries_flat_dt
*dt
)
236 unsigned char buf
[32];
238 unsigned int i
, index
;
239 struct IoHriProcessorVpd
*d
;
243 snprintf(buf
, 32, "PowerPC,%s", cur_cpu_spec
->cpu_name
);
244 p
= strchr(buf
, ' ');
245 if (!p
) p
= buf
+ strlen(buf
);
247 dt_start_node(dt
, "cpus");
248 dt_prop_u32(dt
, "#address-cells", 1);
249 dt_prop_u32(dt
, "#size-cells", 0);
251 pft_size
[0] = 0; /* NUMA CEC cookie, 0 for non NUMA */
252 pft_size
[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE
);
254 for (i
= 0; i
< NR_CPUS
; i
++) {
255 if (lppaca
[i
].dyn_proc_status
>= 2)
258 snprintf(p
, 32 - (p
- buf
), "@%d", i
);
259 dt_start_node(dt
, buf
);
261 dt_prop_str(dt
, "device_type", device_type_cpu
);
263 index
= lppaca
[i
].dyn_hv_phys_proc_index
;
264 d
= &xIoHriProcessorVpd
[index
];
266 dt_prop_u32(dt
, "i-cache-size", d
->xInstCacheSize
* 1024);
267 dt_prop_u32(dt
, "i-cache-line-size", d
->xInstCacheOperandSize
);
269 dt_prop_u32(dt
, "d-cache-size", d
->xDataL1CacheSizeKB
* 1024);
270 dt_prop_u32(dt
, "d-cache-line-size", d
->xDataCacheOperandSize
);
272 /* magic conversions to Hz copied from old code */
273 dt_prop_u32(dt
, "clock-frequency",
274 ((1UL << 34) * 1000000) / d
->xProcFreq
);
275 dt_prop_u32(dt
, "timebase-frequency",
276 ((1UL << 32) * 1000000) / d
->xTimeBaseFreq
);
278 dt_prop_u32(dt
, "reg", i
);
280 dt_prop_u32_list(dt
, "ibm,pft-size", pft_size
, 2);
288 static void __init
dt_model(struct iseries_flat_dt
*dt
)
290 char buf
[16] = "IBM,";
292 /* N.B. lparcfg.c knows about the "IBM," prefixes ... */
293 /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
294 strne2a(buf
+ 4, xItExtVpdPanel
.mfgID
+ 2, 2);
295 strne2a(buf
+ 6, xItExtVpdPanel
.systemSerial
+ 1, 5);
297 dt_prop_str(dt
, "system-id", buf
);
299 /* "IBM," + machineType[0:4] */
300 strne2a(buf
+ 4, xItExtVpdPanel
.machineType
, 4);
302 dt_prop_str(dt
, "model", buf
);
304 dt_prop_str(dt
, "compatible", "IBM,iSeries");
305 dt_prop_u32(dt
, "ibm,partition-no", HvLpConfig_getLpIndex());
308 static void __init
dt_initrd(struct iseries_flat_dt
*dt
)
310 #ifdef CONFIG_BLK_DEV_INITRD
312 dt_prop_u64(dt
, "linux,initrd-start", (u64
)naca
.xRamDisk
);
313 dt_prop_u64(dt
, "linux,initrd-end",
314 (u64
)naca
.xRamDisk
+ naca
.xRamDiskSize
* HW_PAGE_SIZE
);
319 static void __init
dt_do_vdevice(struct iseries_flat_dt
*dt
,
320 const char *name
, u32 reg
, int unit
,
321 const char *type
, const char *compat
, int end
)
325 snprintf(buf
, 32, "%s@%08x", name
, reg
+ ((unit
>= 0) ? unit
: 0));
326 dt_start_node(dt
, buf
);
327 dt_prop_str(dt
, "device_type", type
);
329 dt_prop_str(dt
, "compatible", compat
);
330 dt_prop_u32(dt
, "reg", reg
+ ((unit
>= 0) ? unit
: 0));
332 dt_prop_u32(dt
, "linux,unit_address", unit
);
337 static void __init
dt_vdevices(struct iseries_flat_dt
*dt
)
340 HvLpIndexMap vlan_map
;
343 dt_start_node(dt
, "vdevice");
344 dt_prop_str(dt
, "device_type", device_type_vdevice
);
345 dt_prop_str(dt
, "compatible", "IBM,iSeries-vdevice");
346 dt_prop_u32(dt
, "#address-cells", 1);
347 dt_prop_u32(dt
, "#size-cells", 0);
349 dt_do_vdevice(dt
, "vty", reg
, -1, device_type_serial
,
350 "IBM,iSeries-vty", 1);
353 dt_do_vdevice(dt
, "v-scsi", reg
, -1, device_type_vscsi
,
357 vlan_map
= HvLpConfig_getVirtualLanIndexMap();
358 for (i
= 0; i
< HVMAXARCHITECTEDVIRTUALLANS
; i
++) {
359 unsigned char mac_addr
[ETH_ALEN
];
361 if ((vlan_map
& (0x8000 >> i
)) == 0)
363 dt_do_vdevice(dt
, "l-lan", reg
, i
, device_type_network
,
364 "IBM,iSeries-l-lan", 0);
370 mac_addr
[5] = HvLpConfig_getLpIndex_outline();
371 dt_prop(dt
, "local-mac-address", (char *)mac_addr
, ETH_ALEN
);
372 dt_prop(dt
, "mac-address", (char *)mac_addr
, ETH_ALEN
);
373 dt_prop_u32(dt
, "max-frame-size", 9000);
374 dt_prop_u32(dt
, "address-bits", 48);
378 reg
+= HVMAXARCHITECTEDVIRTUALLANS
;
380 for (i
= 0; i
< HVMAXARCHITECTEDVIRTUALDISKS
; i
++)
381 dt_do_vdevice(dt
, "viodasd", reg
, i
, device_type_block
,
382 "IBM,iSeries-viodasd", 1);
383 reg
+= HVMAXARCHITECTEDVIRTUALDISKS
;
385 for (i
= 0; i
< HVMAXARCHITECTEDVIRTUALCDROMS
; i
++)
386 dt_do_vdevice(dt
, "viocd", reg
, i
, device_type_block
,
387 "IBM,iSeries-viocd", 1);
388 reg
+= HVMAXARCHITECTEDVIRTUALCDROMS
;
390 for (i
= 0; i
< HVMAXARCHITECTEDVIRTUALTAPES
; i
++)
391 dt_do_vdevice(dt
, "viotape", reg
, i
, device_type_byte
,
392 "IBM,iSeries-viotape", 1);
397 struct pci_class_name
{
403 static struct pci_class_name __initdata pci_class_name
[] = {
404 { PCI_CLASS_NETWORK_ETHERNET
, "ethernet", device_type_network
},
407 static struct pci_class_name
* __init
dt_find_pci_class_name(u16 class_code
)
409 struct pci_class_name
*cp
;
411 for (cp
= pci_class_name
;
412 cp
< &pci_class_name
[ARRAY_SIZE(pci_class_name
)]; cp
++)
413 if (cp
->code
== class_code
)
419 * This assumes that the node slot is always on the primary bus!
421 static void __init
scan_bridge_slot(struct iseries_flat_dt
*dt
,
422 HvBusNumber bus
, struct HvCallPci_BridgeInfo
*bridge_info
)
424 HvSubBusNumber sub_bus
= bridge_info
->subBusNumber
;
431 int id_sel
= ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus
);
432 int function
= ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus
);
433 HvAgentId eads_id_sel
= ISERIES_PCI_AGENTID(id_sel
, function
);
435 struct pci_class_name
*cp
;
438 * Connect all functions of any device found.
440 for (id_sel
= 1; id_sel
<= bridge_info
->maxAgents
; id_sel
++) {
441 for (function
= 0; function
< 8; function
++) {
442 HvAgentId agent_id
= ISERIES_PCI_AGENTID(id_sel
,
444 err
= HvCallXm_connectBusUnit(bus
, sub_bus
,
448 DBG("connectBusUnit(%x, %x, %x) %x\n",
449 bus
, sub_bus
, agent_id
, err
);
453 err
= HvCallPci_configLoad16(bus
, sub_bus
, agent_id
,
454 PCI_VENDOR_ID
, &vendor_id
);
456 DBG("ReadVendor(%x, %x, %x) %x\n",
457 bus
, sub_bus
, agent_id
, err
);
460 err
= HvCallPci_configLoad16(bus
, sub_bus
, agent_id
,
461 PCI_DEVICE_ID
, &device_id
);
463 DBG("ReadDevice(%x, %x, %x) %x\n",
464 bus
, sub_bus
, agent_id
, err
);
467 err
= HvCallPci_configLoad32(bus
, sub_bus
, agent_id
,
468 PCI_CLASS_REVISION
, &class_id
);
470 DBG("ReadClass(%x, %x, %x) %x\n",
471 bus
, sub_bus
, agent_id
, err
);
475 devfn
= PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel
),
477 cp
= dt_find_pci_class_name(class_id
>> 16);
479 strncpy(buf
, cp
->name
, sizeof(buf
) - 1);
481 snprintf(buf
, sizeof(buf
), "pci%x,%x",
482 vendor_id
, device_id
);
483 buf
[sizeof(buf
) - 1] = '\0';
484 snprintf(buf
+ strlen(buf
), sizeof(buf
) - strlen(buf
),
485 "@%x", PCI_SLOT(devfn
));
486 buf
[sizeof(buf
) - 1] = '\0';
488 snprintf(buf
+ strlen(buf
),
489 sizeof(buf
) - strlen(buf
),
491 dt_start_node(dt
, buf
);
492 reg
[0] = (bus
<< 16) | (devfn
<< 8);
497 dt_prop_u32_list(dt
, "reg", reg
, 5);
498 if (cp
&& (cp
->type
|| cp
->name
))
499 dt_prop_str(dt
, "device_type",
500 cp
->type
? cp
->type
: cp
->name
);
501 dt_prop_u32(dt
, "vendor-id", vendor_id
);
502 dt_prop_u32(dt
, "device-id", device_id
);
503 dt_prop_u32(dt
, "class-code", class_id
>> 8);
504 dt_prop_u32(dt
, "revision-id", class_id
& 0xff);
505 dt_prop_u32(dt
, "linux,subbus", sub_bus
);
506 dt_prop_u32(dt
, "linux,agent-id", agent_id
);
507 dt_prop_u32(dt
, "linux,logical-slot-number",
508 bridge_info
->logicalSlotNumber
);
515 static void __init
scan_bridge(struct iseries_flat_dt
*dt
, HvBusNumber bus
,
516 HvSubBusNumber sub_bus
, int id_sel
)
518 struct HvCallPci_BridgeInfo bridge_info
;
523 /* Note: hvSubBus and irq is always be 0 at this level! */
524 for (function
= 0; function
< 8; ++function
) {
525 agent_id
= ISERIES_PCI_AGENTID(id_sel
, function
);
526 ret
= HvCallXm_connectBusUnit(bus
, sub_bus
, agent_id
, 0);
529 DBG("connectBusUnit(%x, %x, %x) %x\n",
530 bus
, sub_bus
, agent_id
, ret
);
533 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
534 bus
, id_sel
, function
, agent_id
);
535 ret
= HvCallPci_getBusUnitInfo(bus
, sub_bus
, agent_id
,
536 iseries_hv_addr(&bridge_info
),
537 sizeof(struct HvCallPci_BridgeInfo
));
540 DBG("bridge info: type %x subbus %x "
541 "maxAgents %x maxsubbus %x logslot %x\n",
542 bridge_info
.busUnitInfo
.deviceType
,
543 bridge_info
.subBusNumber
,
544 bridge_info
.maxAgents
,
545 bridge_info
.maxSubBusNumber
,
546 bridge_info
.logicalSlotNumber
);
547 if (bridge_info
.busUnitInfo
.deviceType
==
548 HvCallPci_BridgeDevice
)
549 scan_bridge_slot(dt
, bus
, &bridge_info
);
551 DBG("PCI: Invalid Bridge Configuration(0x%02X)",
552 bridge_info
.busUnitInfo
.deviceType
);
556 static void __init
scan_phb(struct iseries_flat_dt
*dt
, HvBusNumber bus
)
558 struct HvCallPci_DeviceInfo dev_info
;
559 const HvSubBusNumber sub_bus
= 0; /* EADs is always 0. */
562 const int max_agents
= 8;
565 * Probe for EADs Bridges
567 for (id_sel
= 1; id_sel
< max_agents
; ++id_sel
) {
568 err
= HvCallPci_getDeviceInfo(bus
, sub_bus
, id_sel
,
569 iseries_hv_addr(&dev_info
),
570 sizeof(struct HvCallPci_DeviceInfo
));
573 DBG("getDeviceInfo(%x, %x, %x) %x\n",
574 bus
, sub_bus
, id_sel
, err
);
577 if (dev_info
.deviceType
!= HvCallPci_NodeDevice
) {
578 DBG("PCI: Invalid System Configuration"
579 "(0x%02X) for bus 0x%02x id 0x%02x.\n",
580 dev_info
.deviceType
, bus
, id_sel
);
583 scan_bridge(dt
, bus
, sub_bus
, id_sel
);
587 static void __init
dt_pci_devices(struct iseries_flat_dt
*dt
)
594 /* Check all possible buses. */
595 for (bus
= 0; bus
< 256; bus
++) {
596 int err
= HvCallXm_testBus(bus
);
600 * Check for Unexpected Return code, a clue that
601 * something has gone wrong.
604 DBG("Unexpected Return on Probe(0x%02X) "
605 "0x%04X\n", bus
, err
);
608 DBG("bus %d appears to exist\n", bus
);
609 snprintf(buf
, 32, "pci@%d", phb_num
);
610 dt_start_node(dt
, buf
);
611 dt_prop_str(dt
, "device_type", device_type_pci
);
612 dt_prop_str(dt
, "compatible", "IBM,iSeries-Logical-PHB");
613 dt_prop_u32(dt
, "#address-cells", 3);
614 dt_prop_u32(dt
, "#size-cells", 2);
615 buses
[0] = buses
[1] = bus
;
616 dt_prop_u32_list(dt
, "bus-range", buses
, 2);
623 static void dt_finish(struct iseries_flat_dt
*dt
)
625 dt_push_u32(dt
, OF_DT_END
);
626 dt
->header
.totalsize
= (unsigned long)dt_data
- (unsigned long)dt
;
627 klimit
= ALIGN((unsigned long)dt_data
, 8);
630 void * __init
build_flat_dt(unsigned long phys_mem_size
)
632 struct iseries_flat_dt
*iseries_dt
;
635 iseries_dt
= dt_init();
637 dt_start_node(iseries_dt
, "");
639 dt_prop_u32(iseries_dt
, "#address-cells", 2);
640 dt_prop_u32(iseries_dt
, "#size-cells", 2);
641 dt_model(iseries_dt
);
644 dt_start_node(iseries_dt
, "memory@0");
645 dt_prop_str(iseries_dt
, "device_type", device_type_memory
);
647 tmp
[1] = phys_mem_size
;
648 dt_prop_u64_list(iseries_dt
, "reg", tmp
, 2);
649 dt_end_node(iseries_dt
);
652 dt_start_node(iseries_dt
, "chosen");
653 dt_prop_str(iseries_dt
, "bootargs", cmd_line
);
654 dt_initrd(iseries_dt
);
655 dt_end_node(iseries_dt
);
659 dt_vdevices(iseries_dt
);
660 dt_pci_devices(iseries_dt
);
662 dt_end_node(iseries_dt
);
664 dt_finish(iseries_dt
);