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[PATCH] powerpc: split device tree stuff out of iseries/setup.c
[linux-2.6/sactl.git] / arch / powerpc / platforms / iseries / dt.c
blob93d4233e73e5a27893c1c71dffcdb31ad86cb6f5
1 /*
2 * Copyright (c) 2005-2006 Michael Ellerman, IBM Corporation
3 *
4 * Description:
5 * This file contains all the routines to build a flattened device
6 * tree for a legacy iSeries machine.
7 *
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.
12 */
13
14 #undef DEBUG
15
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 */
26
27 #include <asm/machdep.h>
28 #include <asm/prom.h>
29 #include <asm/lppaca.h>
30 #include <asm/page.h>
31 #include <asm/cputable.h>
32 #include <asm/abs_addr.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>
37 #include <asm/udbg.h>
38
39 #include "processor_vpd.h"
40 #include "call_hpt.h"
41 #include "call_pci.h"
42 #include "pci.h"
43
44 #ifdef DEBUG
45 #define DBG(fmt...) udbg_printf(fmt)
46 #else
47 #define DBG(fmt...)
48 #endif
49
50 struct blob {
51 unsigned char data[PAGE_SIZE * 2];
52 unsigned long next;
53 };
54
55 struct iseries_flat_dt {
56 struct boot_param_header header;
57 u64 reserve_map[2];
58 struct blob dt;
59 struct blob strings;
60 };
61
62 static struct iseries_flat_dt iseries_dt;
63
64 static void __init dt_init(struct iseries_flat_dt *dt)
65 {
66 dt->header.off_mem_rsvmap =
67 offsetof(struct iseries_flat_dt, reserve_map);
68 dt->header.off_dt_struct = offsetof(struct iseries_flat_dt, dt);
69 dt->header.off_dt_strings = offsetof(struct iseries_flat_dt, strings);
70 dt->header.totalsize = sizeof(struct iseries_flat_dt);
71 dt->header.dt_strings_size = sizeof(struct blob);
72
73 /* There is no notion of hardware cpu id on iSeries */
74 dt->header.boot_cpuid_phys = smp_processor_id();
75
76 dt->dt.next = (unsigned long)&dt->dt.data;
77 dt->strings.next = (unsigned long)&dt->strings.data;
78
79 dt->header.magic = OF_DT_HEADER;
80 dt->header.version = 0x10;
81 dt->header.last_comp_version = 0x10;
82
83 dt->reserve_map[0] = 0;
84 dt->reserve_map[1] = 0;
85 }
86
87 static void __init dt_check_blob(struct blob *b)
88 {
89 if (b->next >= (unsigned long)&b->next) {
90 DBG("Ran out of space in flat device tree blob!\n");
91 BUG();
92 }
93 }
94
95 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
96 {
97 *((u32*)dt->dt.next) = value;
98 dt->dt.next += sizeof(u32);
99
100 dt_check_blob(&dt->dt);
101 }
102
103 #ifdef notyet
104 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
105 {
106 *((u64*)dt->dt.next) = value;
107 dt->dt.next += sizeof(u64);
108
109 dt_check_blob(&dt->dt);
110 }
111 #endif
112
113 static unsigned long __init dt_push_bytes(struct blob *blob, char *data, int len)
114 {
115 unsigned long start = blob->next - (unsigned long)blob->data;
116
117 memcpy((char *)blob->next, data, len);
118 blob->next = _ALIGN(blob->next + len, 4);
119
120 dt_check_blob(blob);
121
122 return start;
123 }
124
125 static void __init dt_start_node(struct iseries_flat_dt *dt, char *name)
126 {
127 dt_push_u32(dt, OF_DT_BEGIN_NODE);
128 dt_push_bytes(&dt->dt, name, strlen(name) + 1);
129 }
130
131 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
132
133 static void __init dt_prop(struct iseries_flat_dt *dt, char *name,
134 char *data, int len)
135 {
136 unsigned long offset;
137
138 dt_push_u32(dt, OF_DT_PROP);
139
140 /* Length of the data */
141 dt_push_u32(dt, len);
142
143 /* Put the property name in the string blob. */
144 offset = dt_push_bytes(&dt->strings, name, strlen(name) + 1);
145
146 /* The offset of the properties name in the string blob. */
147 dt_push_u32(dt, (u32)offset);
148
149 /* The actual data. */
150 dt_push_bytes(&dt->dt, data, len);
151 }
152
153 static void __init dt_prop_str(struct iseries_flat_dt *dt, char *name,
154 char *data)
155 {
156 dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
157 }
158
159 static void __init dt_prop_u32(struct iseries_flat_dt *dt, char *name, u32 data)
160 {
161 dt_prop(dt, name, (char *)&data, sizeof(u32));
162 }
163
164 static void __init dt_prop_u64(struct iseries_flat_dt *dt, char *name, u64 data)
165 {
166 dt_prop(dt, name, (char *)&data, sizeof(u64));
167 }
168
169 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt, char *name,
170 u64 *data, int n)
171 {
172 dt_prop(dt, name, (char *)data, sizeof(u64) * n);
173 }
174
175 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt, char *name,
176 u32 *data, int n)
177 {
178 dt_prop(dt, name, (char *)data, sizeof(u32) * n);
179 }
180
181 #ifdef notyet
182 static void __init dt_prop_empty(struct iseries_flat_dt *dt, char *name)
183 {
184 dt_prop(dt, name, NULL, 0);
185 }
186 #endif
187
188 static void __init dt_cpus(struct iseries_flat_dt *dt)
189 {
190 unsigned char buf[32];
191 unsigned char *p;
192 unsigned int i, index;
193 struct IoHriProcessorVpd *d;
194 u32 pft_size[2];
195
196 /* yuck */
197 snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
198 p = strchr(buf, ' ');
199 if (!p) p = buf + strlen(buf);
200
201 dt_start_node(dt, "cpus");
202 dt_prop_u32(dt, "#address-cells", 1);
203 dt_prop_u32(dt, "#size-cells", 0);
204
205 pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA */
206 pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
207
208 for (i = 0; i < NR_CPUS; i++) {
209 if (lppaca[i].dyn_proc_status >= 2)
210 continue;
211
212 snprintf(p, 32 - (p - buf), "@%d", i);
213 dt_start_node(dt, buf);
214
215 dt_prop_str(dt, "device_type", "cpu");
216
217 index = lppaca[i].dyn_hv_phys_proc_index;
218 d = &xIoHriProcessorVpd[index];
219
220 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
221 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
222
223 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
224 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
225
226 /* magic conversions to Hz copied from old code */
227 dt_prop_u32(dt, "clock-frequency",
228 ((1UL << 34) * 1000000) / d->xProcFreq);
229 dt_prop_u32(dt, "timebase-frequency",
230 ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
231
232 dt_prop_u32(dt, "reg", i);
233
234 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
235
236 dt_end_node(dt);
237 }
238
239 dt_end_node(dt);
240 }
241
242 static void __init dt_model(struct iseries_flat_dt *dt)
243 {
244 char buf[16] = "IBM,";
245
246 /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
247 strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
248 strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
249 buf[11] = '\0';
250 dt_prop_str(dt, "system-id", buf);
251
252 /* "IBM," + machineType[0:4] */
253 strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
254 buf[8] = '\0';
255 dt_prop_str(dt, "model", buf);
256
257 dt_prop_str(dt, "compatible", "IBM,iSeries");
258 }
259
260 static void __init dt_vdevices(struct iseries_flat_dt *dt)
261 {
262 u32 reg = 0;
263 HvLpIndexMap vlan_map;
264 int i;
265 char buf[32];
266
267 dt_start_node(dt, "vdevice");
268 dt_prop_str(dt, "device_type", "vdevice");
269 dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
270 dt_prop_u32(dt, "#address-cells", 1);
271 dt_prop_u32(dt, "#size-cells", 0);
272
273 snprintf(buf, sizeof(buf), "vty@%08x", reg);
274 dt_start_node(dt, buf);
275 dt_prop_str(dt, "device_type", "serial");
276 dt_prop_u32(dt, "reg", reg);
277 dt_end_node(dt);
278 reg++;
279
280 snprintf(buf, sizeof(buf), "v-scsi@%08x", reg);
281 dt_start_node(dt, buf);
282 dt_prop_str(dt, "device_type", "vscsi");
283 dt_prop_str(dt, "compatible", "IBM,v-scsi");
284 dt_prop_u32(dt, "reg", reg);
285 dt_end_node(dt);
286 reg++;
287
288 vlan_map = HvLpConfig_getVirtualLanIndexMap();
289 for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
290 unsigned char mac_addr[ETH_ALEN];
291
292 if ((vlan_map & (0x8000 >> i)) == 0)
293 continue;
294 snprintf(buf, 32, "l-lan@%08x", reg + i);
295 dt_start_node(dt, buf);
296 dt_prop_str(dt, "device_type", "network");
297 dt_prop_str(dt, "compatible", "IBM,iSeries-l-lan");
298 dt_prop_u32(dt, "reg", reg + i);
299 dt_prop_u32(dt, "linux,unit_address", i);
300
301 mac_addr[0] = 0x02;
302 mac_addr[1] = 0x01;
303 mac_addr[2] = 0xff;
304 mac_addr[3] = i;
305 mac_addr[4] = 0xff;
306 mac_addr[5] = HvLpConfig_getLpIndex_outline();
307 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
308 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
309 dt_prop_u32(dt, "max-frame-size", 9000);
310 dt_prop_u32(dt, "address-bits", 48);
311
312 dt_end_node(dt);
313 }
314 reg += HVMAXARCHITECTEDVIRTUALLANS;
315
316 for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++) {
317 snprintf(buf, 32, "viodasd@%08x", reg + i);
318 dt_start_node(dt, buf);
319 dt_prop_str(dt, "device_type", "block");
320 dt_prop_str(dt, "compatible", "IBM,iSeries-viodasd");
321 dt_prop_u32(dt, "reg", reg + i);
322 dt_prop_u32(dt, "linux,unit_address", i);
323 dt_end_node(dt);
324 }
325 reg += HVMAXARCHITECTEDVIRTUALDISKS;
326 for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++) {
327 snprintf(buf, 32, "viocd@%08x", reg + i);
328 dt_start_node(dt, buf);
329 dt_prop_str(dt, "device_type", "block");
330 dt_prop_str(dt, "compatible", "IBM,iSeries-viocd");
331 dt_prop_u32(dt, "reg", reg + i);
332 dt_prop_u32(dt, "linux,unit_address", i);
333 dt_end_node(dt);
334 }
335 reg += HVMAXARCHITECTEDVIRTUALCDROMS;
336 for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++) {
337 snprintf(buf, 32, "viotape@%08x", reg + i);
338 dt_start_node(dt, buf);
339 dt_prop_str(dt, "device_type", "byte");
340 dt_prop_str(dt, "compatible", "IBM,iSeries-viotape");
341 dt_prop_u32(dt, "reg", reg + i);
342 dt_prop_u32(dt, "linux,unit_address", i);
343 dt_end_node(dt);
344 }
345
346 dt_end_node(dt);
347 }
348
349 struct pci_class_name {
350 u16 code;
351 char *name;
352 char *type;
353 };
354
355 static struct pci_class_name __initdata pci_class_name[] = {
356 { PCI_CLASS_NETWORK_ETHERNET, "ethernet", "network" },
357 };
358
359 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
360 {
361 struct pci_class_name *cp;
362
363 for (cp = pci_class_name;
364 cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
365 if (cp->code == class_code)
366 return cp;
367 return NULL;
368 }
369
370 /*
371 * This assumes that the node slot is always on the primary bus!
372 */
373 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
374 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
375 {
376 HvSubBusNumber sub_bus = bridge_info->subBusNumber;
377 u16 vendor_id;
378 u16 device_id;
379 u32 class_id;
380 int err;
381 char buf[32];
382 u32 reg[5];
383 int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
384 int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
385 HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
386 u8 devfn;
387 struct pci_class_name *cp;
388
389 /*
390 * Connect all functions of any device found.
391 */
392 for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
393 for (function = 0; function < 8; function++) {
394 HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
395 function);
396 err = HvCallXm_connectBusUnit(bus, sub_bus,
397 agent_id, 0);
398 if (err) {
399 if (err != 0x302)
400 printk(KERN_DEBUG
401 "connectBusUnit(%x, %x, %x) "
402 "== %x\n",
403 bus, sub_bus, agent_id, err);
404 continue;
405 }
406
407 err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
408 PCI_VENDOR_ID, &vendor_id);
409 if (err) {
410 printk(KERN_DEBUG
411 "ReadVendor(%x, %x, %x) == %x\n",
412 bus, sub_bus, agent_id, err);
413 continue;
414 }
415 err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
416 PCI_DEVICE_ID, &device_id);
417 if (err) {
418 printk(KERN_DEBUG
419 "ReadDevice(%x, %x, %x) == %x\n",
420 bus, sub_bus, agent_id, err);
421 continue;
422 }
423 err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
424 PCI_CLASS_REVISION , &class_id);
425 if (err) {
426 printk(KERN_DEBUG
427 "ReadClass(%x, %x, %x) == %x\n",
428 bus, sub_bus, agent_id, err);
429 continue;
430 }
431
432 devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
433 function);
434 cp = dt_find_pci_class_name(class_id >> 16);
435 if (cp && cp->name)
436 strncpy(buf, cp->name, sizeof(buf) - 1);
437 else
438 snprintf(buf, sizeof(buf), "pci%x,%x",
439 vendor_id, device_id);
440 buf[sizeof(buf) - 1] = '\0';
441 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
442 "@%x", PCI_SLOT(devfn));
443 buf[sizeof(buf) - 1] = '\0';
444 if (function != 0)
445 snprintf(buf + strlen(buf),
446 sizeof(buf) - strlen(buf),
447 ",%x", function);
448 dt_start_node(dt, buf);
449 reg[0] = (bus << 16) | (devfn << 8);
450 reg[1] = 0;
451 reg[2] = 0;
452 reg[3] = 0;
453 reg[4] = 0;
454 dt_prop_u32_list(dt, "reg", reg, 5);
455 if (cp && (cp->type || cp->name))
456 dt_prop_str(dt, "device_type",
457 cp->type ? cp->type : cp->name);
458 dt_prop_u32(dt, "vendor-id", vendor_id);
459 dt_prop_u32(dt, "device-id", device_id);
460 dt_prop_u32(dt, "class-code", class_id >> 8);
461 dt_prop_u32(dt, "revision-id", class_id & 0xff);
462 dt_prop_u32(dt, "linux,subbus", sub_bus);
463 dt_prop_u32(dt, "linux,agent-id", agent_id);
464 dt_prop_u32(dt, "linux,logical-slot-number",
465 bridge_info->logicalSlotNumber);
466 dt_end_node(dt);
467
468 }
469 }
470 }
471
472 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
473 HvSubBusNumber sub_bus, int id_sel)
474 {
475 struct HvCallPci_BridgeInfo bridge_info;
476 HvAgentId agent_id;
477 int function;
478 int ret;
479
480 /* Note: hvSubBus and irq is always be 0 at this level! */
481 for (function = 0; function < 8; ++function) {
482 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
483 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
484 if (ret != 0) {
485 if (ret != 0xb)
486 printk(KERN_DEBUG "connectBusUnit(%x, %x, %x) "
487 "== %x\n",
488 bus, sub_bus, agent_id, ret);
489 continue;
490 }
491 printk("found device at bus %d idsel %d func %d (AgentId %x)\n",
492 bus, id_sel, function, agent_id);
493 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
494 iseries_hv_addr(&bridge_info),
495 sizeof(struct HvCallPci_BridgeInfo));
496 if (ret != 0)
497 continue;
498 printk("bridge info: type %x subbus %x "
499 "maxAgents %x maxsubbus %x logslot %x\n",
500 bridge_info.busUnitInfo.deviceType,
501 bridge_info.subBusNumber,
502 bridge_info.maxAgents,
503 bridge_info.maxSubBusNumber,
504 bridge_info.logicalSlotNumber);
505 if (bridge_info.busUnitInfo.deviceType ==
506 HvCallPci_BridgeDevice)
507 scan_bridge_slot(dt, bus, &bridge_info);
508 else
509 printk("PCI: Invalid Bridge Configuration(0x%02X)",
510 bridge_info.busUnitInfo.deviceType);
511 }
512 }
513
514 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
515 {
516 struct HvCallPci_DeviceInfo dev_info;
517 const HvSubBusNumber sub_bus = 0; /* EADs is always 0. */
518 int err;
519 int id_sel;
520 const int max_agents = 8;
521
522 /*
523 * Probe for EADs Bridges
524 */
525 for (id_sel = 1; id_sel < max_agents; ++id_sel) {
526 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
527 iseries_hv_addr(&dev_info),
528 sizeof(struct HvCallPci_DeviceInfo));
529 if (err) {
530 if (err != 0x302)
531 printk(KERN_DEBUG "getDeviceInfo(%x, %x, %x) "
532 "== %x\n",
533 bus, sub_bus, id_sel, err);
534 continue;
535 }
536 if (dev_info.deviceType != HvCallPci_NodeDevice) {
537 printk(KERN_DEBUG "PCI: Invalid System Configuration"
538 "(0x%02X) for bus 0x%02x id 0x%02x.\n",
539 dev_info.deviceType, bus, id_sel);
540 continue;
541 }
542 scan_bridge(dt, bus, sub_bus, id_sel);
543 }
544 }
545
546 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
547 {
548 HvBusNumber bus;
549 char buf[32];
550 u32 buses[2];
551 int phb_num = 0;
552
553 /* Check all possible buses. */
554 for (bus = 0; bus < 256; bus++) {
555 int err = HvCallXm_testBus(bus);
556
557 if (err) {
558 /*
559 * Check for Unexpected Return code, a clue that
560 * something has gone wrong.
561 */
562 if (err != 0x0301)
563 printk(KERN_ERR "Unexpected Return on Probe"
564 "(0x%02X): 0x%04X", bus, err);
565 continue;
566 }
567 printk("bus %d appears to exist\n", bus);
568 snprintf(buf, 32, "pci@%d", phb_num);
569 dt_start_node(dt, buf);
570 dt_prop_str(dt, "device_type", "pci");
571 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
572 dt_prop_u32(dt, "#address-cells", 3);
573 dt_prop_u32(dt, "#size-cells", 2);
574 buses[0] = buses[1] = bus;
575 dt_prop_u32_list(dt, "bus-range", buses, 2);
576 scan_phb(dt, bus);
577 dt_end_node(dt);
578 phb_num++;
579 }
580 }
581
582 void * __init build_flat_dt(unsigned long phys_mem_size)
583 {
584 u64 tmp[2];
585
586 dt_init(&iseries_dt);
587
588 dt_start_node(&iseries_dt, "");
589
590 dt_prop_u32(&iseries_dt, "#address-cells", 2);
591 dt_prop_u32(&iseries_dt, "#size-cells", 2);
592 dt_model(&iseries_dt);
593
594 /* /memory */
595 dt_start_node(&iseries_dt, "memory@0");
596 dt_prop_str(&iseries_dt, "name", "memory");
597 dt_prop_str(&iseries_dt, "device_type", "memory");
598 tmp[0] = 0;
599 tmp[1] = phys_mem_size;
600 dt_prop_u64_list(&iseries_dt, "reg", tmp, 2);
601 dt_end_node(&iseries_dt);
602
603 /* /chosen */
604 dt_start_node(&iseries_dt, "chosen");
605 dt_prop_str(&iseries_dt, "bootargs", cmd_line);
606 dt_end_node(&iseries_dt);
607
608 dt_cpus(&iseries_dt);
609
610 dt_vdevices(&iseries_dt);
611 dt_pci_devices(&iseries_dt);
612
613 dt_end_node(&iseries_dt);
614
615 dt_push_u32(&iseries_dt, OF_DT_END);
616
617 return &iseries_dt;
618 }
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