[PATCH] powerpc: split device tree stuff out of iseries/setup.c
[linux-2.6.git] / arch / powerpc / platforms / iseries / dt.c
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 }