[POWERPC] iseries: A new iSeries console
[karo-tx-linux.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/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>
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 /*
51  * These are created by the linker script at the start and end
52  * of the section containing all the strings from this file.
53  */
54 extern char __dt_strings_start[];
55 extern char __dt_strings_end[];
56
57 struct iseries_flat_dt {
58         struct boot_param_header header;
59         u64 reserve_map[2];
60 };
61
62 static void * __initdata dt_data;
63
64 /*
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.
68  */
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";
78
79 static struct iseries_flat_dt * __init dt_init(void)
80 {
81         struct iseries_flat_dt *dt;
82         unsigned long str_len;
83
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
90                 + ALIGN(str_len, 8);
91         dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
92         dt->header.dt_strings_size = str_len;
93
94         /* There is no notion of hardware cpu id on iSeries */
95         dt->header.boot_cpuid_phys = smp_processor_id();
96
97         memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
98                         str_len);
99
100         dt->header.magic = OF_DT_HEADER;
101         dt->header.version = 0x10;
102         dt->header.last_comp_version = 0x10;
103
104         dt->reserve_map[0] = 0;
105         dt->reserve_map[1] = 0;
106
107         return dt;
108 }
109
110 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
111 {
112         *((u32 *)dt_data) = value;
113         dt_data += sizeof(u32);
114 }
115
116 #ifdef notyet
117 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
118 {
119         *((u64 *)dt_data) = value;
120         dt_data += sizeof(u64);
121 }
122 #endif
123
124 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
125                 int len)
126 {
127         memcpy(dt_data, data, len);
128         dt_data += ALIGN(len, 4);
129 }
130
131 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
132 {
133         dt_push_u32(dt, OF_DT_BEGIN_NODE);
134         dt_push_bytes(dt, name, strlen(name) + 1);
135 }
136
137 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
138
139 static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
140                 const void *data, int len)
141 {
142         unsigned long offset;
143
144         dt_push_u32(dt, OF_DT_PROP);
145
146         /* Length of the data */
147         dt_push_u32(dt, len);
148
149         offset = name - __dt_strings_start;
150
151         /* The offset of the properties name in the string blob. */
152         dt_push_u32(dt, (u32)offset);
153
154         /* The actual data. */
155         dt_push_bytes(dt, data, len);
156 }
157
158 static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
159                 const char *data)
160 {
161         dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
162 }
163
164 static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
165                 u32 data)
166 {
167         dt_prop(dt, name, &data, sizeof(u32));
168 }
169
170 #ifdef notyet
171 static void __init dt_prop_u64(struct iseries_flat_dt *dt, const char *name,
172                 u64 data)
173 {
174         dt_prop(dt, name, &data, sizeof(u64));
175 }
176 #endif
177
178 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
179                 const char *name, u64 *data, int n)
180 {
181         dt_prop(dt, name, data, sizeof(u64) * n);
182 }
183
184 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
185                 const char *name, u32 *data, int n)
186 {
187         dt_prop(dt, name, data, sizeof(u32) * n);
188 }
189
190 #ifdef notyet
191 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
192 {
193         dt_prop(dt, name, NULL, 0);
194 }
195 #endif
196
197 static void __init dt_cpus(struct iseries_flat_dt *dt)
198 {
199         unsigned char buf[32];
200         unsigned char *p;
201         unsigned int i, index;
202         struct IoHriProcessorVpd *d;
203         u32 pft_size[2];
204
205         /* yuck */
206         snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
207         p = strchr(buf, ' ');
208         if (!p) p = buf + strlen(buf);
209
210         dt_start_node(dt, "cpus");
211         dt_prop_u32(dt, "#address-cells", 1);
212         dt_prop_u32(dt, "#size-cells", 0);
213
214         pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA  */
215         pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
216
217         for (i = 0; i < NR_CPUS; i++) {
218                 if (lppaca[i].dyn_proc_status >= 2)
219                         continue;
220
221                 snprintf(p, 32 - (p - buf), "@%d", i);
222                 dt_start_node(dt, buf);
223
224                 dt_prop_str(dt, "device_type", device_type_cpu);
225
226                 index = lppaca[i].dyn_hv_phys_proc_index;
227                 d = &xIoHriProcessorVpd[index];
228
229                 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
230                 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
231
232                 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
233                 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
234
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);
240
241                 dt_prop_u32(dt, "reg", i);
242
243                 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
244
245                 dt_end_node(dt);
246         }
247
248         dt_end_node(dt);
249 }
250
251 static void __init dt_model(struct iseries_flat_dt *dt)
252 {
253         char buf[16] = "IBM,";
254
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);
259         buf[11] = '\0';
260         dt_prop_str(dt, "system-id", buf);
261
262         /* "IBM," + machineType[0:4] */
263         strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
264         buf[8] = '\0';
265         dt_prop_str(dt, "model", buf);
266
267         dt_prop_str(dt, "compatible", "IBM,iSeries");
268         dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
269 }
270
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)
274 {
275         char buf[32];
276
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);
280         if (compat)
281                 dt_prop_str(dt, "compatible", compat);
282         dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
283         if (unit >= 0)
284                 dt_prop_u32(dt, "linux,unit_address", unit);
285         if (end)
286                 dt_end_node(dt);
287 }
288
289 static void __init dt_vdevices(struct iseries_flat_dt *dt)
290 {
291         u32 reg = 0;
292         HvLpIndexMap vlan_map;
293         int i;
294
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);
300
301         dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
302                         "IBM,iSeries-vty", 1);
303         reg++;
304
305         dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
306                         "IBM,v-scsi", 1);
307         reg++;
308
309         vlan_map = HvLpConfig_getVirtualLanIndexMap();
310         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
311                 unsigned char mac_addr[ETH_ALEN];
312
313                 if ((vlan_map & (0x8000 >> i)) == 0)
314                         continue;
315                 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
316                                 "IBM,iSeries-l-lan", 0);
317                 mac_addr[0] = 0x02;
318                 mac_addr[1] = 0x01;
319                 mac_addr[2] = 0xff;
320                 mac_addr[3] = i;
321                 mac_addr[4] = 0xff;
322                 mac_addr[5] = HvLpConfig_getLpIndex_outline();
323                 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
324                 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
325                 dt_prop_u32(dt, "max-frame-size", 9000);
326                 dt_prop_u32(dt, "address-bits", 48);
327
328                 dt_end_node(dt);
329         }
330         reg += HVMAXARCHITECTEDVIRTUALLANS;
331
332         for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
333                 dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
334                                 "IBM,iSeries-viodasd", 1);
335         reg += HVMAXARCHITECTEDVIRTUALDISKS;
336
337         for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
338                 dt_do_vdevice(dt, "viocd", reg, i, device_type_block,
339                                 "IBM,iSeries-viocd", 1);
340         reg += HVMAXARCHITECTEDVIRTUALCDROMS;
341
342         for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
343                 dt_do_vdevice(dt, "viotape", reg, i, device_type_byte,
344                                 "IBM,iSeries-viotape", 1);
345
346         dt_end_node(dt);
347 }
348
349 struct pci_class_name {
350         u16 code;
351         const char *name;
352         const char *type;
353 };
354
355 static struct pci_class_name __initdata pci_class_name[] = {
356         { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_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                                         DBG("connectBusUnit(%x, %x, %x) %x\n",
401                                                 bus, sub_bus, agent_id, err);
402                                 continue;
403                         }
404
405                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
406                                         PCI_VENDOR_ID, &vendor_id);
407                         if (err) {
408                                 DBG("ReadVendor(%x, %x, %x) %x\n",
409                                         bus, sub_bus, agent_id, err);
410                                 continue;
411                         }
412                         err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
413                                         PCI_DEVICE_ID, &device_id);
414                         if (err) {
415                                 DBG("ReadDevice(%x, %x, %x) %x\n",
416                                         bus, sub_bus, agent_id, err);
417                                 continue;
418                         }
419                         err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
420                                         PCI_CLASS_REVISION , &class_id);
421                         if (err) {
422                                 DBG("ReadClass(%x, %x, %x) %x\n",
423                                         bus, sub_bus, agent_id, err);
424                                 continue;
425                         }
426
427                         devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
428                                         function);
429                         cp = dt_find_pci_class_name(class_id >> 16);
430                         if (cp && cp->name)
431                                 strncpy(buf, cp->name, sizeof(buf) - 1);
432                         else
433                                 snprintf(buf, sizeof(buf), "pci%x,%x",
434                                                 vendor_id, device_id);
435                         buf[sizeof(buf) - 1] = '\0';
436                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
437                                         "@%x", PCI_SLOT(devfn));
438                         buf[sizeof(buf) - 1] = '\0';
439                         if (function != 0)
440                                 snprintf(buf + strlen(buf),
441                                         sizeof(buf) - strlen(buf),
442                                         ",%x", function);
443                         dt_start_node(dt, buf);
444                         reg[0] = (bus << 16) | (devfn << 8);
445                         reg[1] = 0;
446                         reg[2] = 0;
447                         reg[3] = 0;
448                         reg[4] = 0;
449                         dt_prop_u32_list(dt, "reg", reg, 5);
450                         if (cp && (cp->type || cp->name))
451                                 dt_prop_str(dt, "device_type",
452                                         cp->type ? cp->type : cp->name);
453                         dt_prop_u32(dt, "vendor-id", vendor_id);
454                         dt_prop_u32(dt, "device-id", device_id);
455                         dt_prop_u32(dt, "class-code", class_id >> 8);
456                         dt_prop_u32(dt, "revision-id", class_id & 0xff);
457                         dt_prop_u32(dt, "linux,subbus", sub_bus);
458                         dt_prop_u32(dt, "linux,agent-id", agent_id);
459                         dt_prop_u32(dt, "linux,logical-slot-number",
460                                         bridge_info->logicalSlotNumber);
461                         dt_end_node(dt);
462
463                 }
464         }
465 }
466
467 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
468                 HvSubBusNumber sub_bus, int id_sel)
469 {
470         struct HvCallPci_BridgeInfo bridge_info;
471         HvAgentId agent_id;
472         int function;
473         int ret;
474
475         /* Note: hvSubBus and irq is always be 0 at this level! */
476         for (function = 0; function < 8; ++function) {
477                 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
478                 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
479                 if (ret != 0) {
480                         if (ret != 0xb)
481                                 DBG("connectBusUnit(%x, %x, %x) %x\n",
482                                                 bus, sub_bus, agent_id, ret);
483                         continue;
484                 }
485                 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
486                                 bus, id_sel, function, agent_id);
487                 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
488                                 iseries_hv_addr(&bridge_info),
489                                 sizeof(struct HvCallPci_BridgeInfo));
490                 if (ret != 0)
491                         continue;
492                 DBG("bridge info: type %x subbus %x "
493                         "maxAgents %x maxsubbus %x logslot %x\n",
494                         bridge_info.busUnitInfo.deviceType,
495                         bridge_info.subBusNumber,
496                         bridge_info.maxAgents,
497                         bridge_info.maxSubBusNumber,
498                         bridge_info.logicalSlotNumber);
499                 if (bridge_info.busUnitInfo.deviceType ==
500                                 HvCallPci_BridgeDevice)
501                         scan_bridge_slot(dt, bus, &bridge_info);
502                 else
503                         DBG("PCI: Invalid Bridge Configuration(0x%02X)",
504                                 bridge_info.busUnitInfo.deviceType);
505         }
506 }
507
508 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
509 {
510         struct HvCallPci_DeviceInfo dev_info;
511         const HvSubBusNumber sub_bus = 0;       /* EADs is always 0. */
512         int err;
513         int id_sel;
514         const int max_agents = 8;
515
516         /*
517          * Probe for EADs Bridges
518          */
519         for (id_sel = 1; id_sel < max_agents; ++id_sel) {
520                 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
521                                 iseries_hv_addr(&dev_info),
522                                 sizeof(struct HvCallPci_DeviceInfo));
523                 if (err) {
524                         if (err != 0x302)
525                                 DBG("getDeviceInfo(%x, %x, %x) %x\n",
526                                                 bus, sub_bus, id_sel, err);
527                         continue;
528                 }
529                 if (dev_info.deviceType != HvCallPci_NodeDevice) {
530                         DBG("PCI: Invalid System Configuration"
531                                         "(0x%02X) for bus 0x%02x id 0x%02x.\n",
532                                         dev_info.deviceType, bus, id_sel);
533                         continue;
534                 }
535                 scan_bridge(dt, bus, sub_bus, id_sel);
536         }
537 }
538
539 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
540 {
541         HvBusNumber bus;
542         char buf[32];
543         u32 buses[2];
544         int phb_num = 0;
545
546         /* Check all possible buses. */
547         for (bus = 0; bus < 256; bus++) {
548                 int err = HvCallXm_testBus(bus);
549
550                 if (err) {
551                         /*
552                          * Check for Unexpected Return code, a clue that
553                          * something has gone wrong.
554                          */
555                         if (err != 0x0301)
556                                 DBG("Unexpected Return on Probe(0x%02X) "
557                                                 "0x%04X\n", bus, err);
558                         continue;
559                 }
560                 DBG("bus %d appears to exist\n", bus);
561                 snprintf(buf, 32, "pci@%d", phb_num);
562                 dt_start_node(dt, buf);
563                 dt_prop_str(dt, "device_type", device_type_pci);
564                 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
565                 dt_prop_u32(dt, "#address-cells", 3);
566                 dt_prop_u32(dt, "#size-cells", 2);
567                 buses[0] = buses[1] = bus;
568                 dt_prop_u32_list(dt, "bus-range", buses, 2);
569                 scan_phb(dt, bus);
570                 dt_end_node(dt);
571                 phb_num++;
572         }
573 }
574
575 static void dt_finish(struct iseries_flat_dt *dt)
576 {
577         dt_push_u32(dt, OF_DT_END);
578         dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
579         klimit = ALIGN((unsigned long)dt_data, 8);
580 }
581
582 void * __init build_flat_dt(unsigned long phys_mem_size)
583 {
584         struct iseries_flat_dt *iseries_dt;
585         u64 tmp[2];
586
587         iseries_dt = dt_init();
588
589         dt_start_node(iseries_dt, "");
590
591         dt_prop_u32(iseries_dt, "#address-cells", 2);
592         dt_prop_u32(iseries_dt, "#size-cells", 2);
593         dt_model(iseries_dt);
594
595         /* /memory */
596         dt_start_node(iseries_dt, "memory@0");
597         dt_prop_str(iseries_dt, "device_type", 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_finish(iseries_dt);
616
617         return iseries_dt;
618 }