summaryrefslogtreecommitdiffstats
path: root/hdata/iohub.c
blob: 7676adfb19379d71e48e569a09743bf57015d165 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
/* Copyright 2013-2014 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <skiboot.h>
#include "spira.h"
#include <cpu.h>
#include <fsp.h>
#include <opal.h>
#include <ccan/str/str.h>
#include <ccan/array_size/array_size.h>
#include <device.h>
#include <p7ioc.h>
#include <vpd.h>
#include <inttypes.h>

#include "hdata.h"

static void io_add_common(struct dt_node *hn, const struct cechub_io_hub *hub)
{
	dt_add_property_cells(hn, "#address-cells", 2);
	dt_add_property_cells(hn, "#size-cells", 2);
	dt_add_property_cells(hn, "ibm,buid-ext", be32_to_cpu(hub->buid_ext));
	dt_add_property_cells(hn, "ibm,chip-id",
			      pcid_to_chip_id(be32_to_cpu(hub->proc_chip_id)));
	dt_add_property_cells(hn, "ibm,gx-index", be32_to_cpu(hub->gx_index));
	dt_add_property_cells(hn, "revision", be32_to_cpu(hub->ec_level));

	/* Instead of exposing the GX BARs as separate ranges as we *should*
	 * do in an ideal world, we just create a pass-through ranges and
	 * we use separate properties for the BARs.
	 *
	 * This is hackish but will do for now and avoids us having to
	 * do too complex ranges property parsing
	 */
	dt_add_property(hn, "ranges", NULL, 0);
	dt_add_property_cells(hn, "ibm,gx-bar-1",
			      hi32(be64_to_cpu(hub->gx_ctrl_bar1)), lo32(be64_to_cpu(hub->gx_ctrl_bar1)));
	dt_add_property_cells(hn, "ibm,gx-bar-2",
			      hi32(be64_to_cpu(hub->gx_ctrl_bar2)), lo32(be64_to_cpu(hub->gx_ctrl_bar2)));

	/* Add presence detect if valid */
	if (hub->flags & CECHUB_HUB_FLAG_FAB_BR0_PDT)
		dt_add_property_cells(hn, "ibm,br0-presence-detect",
				      hub->fab_br0_pdt);
	if (hub->flags & CECHUB_HUB_FLAG_FAB_BR1_PDT)
		dt_add_property_cells(hn, "ibm,br1-presence-detect",
				      hub->fab_br1_pdt);
}

static bool io_get_lx_info(const void *kwvpd, unsigned int kwvpd_sz,
			   int lx_idx, struct dt_node *hn)
{
	const void *lxr;
	char recname[5];

	/* Find LXRn, where n is the index passed in*/
	strcpy(recname, "LXR0");
	recname[3] += lx_idx;
	lxr = vpd_find(kwvpd, kwvpd_sz, recname, "LX", NULL);
	if (!lxr) {
		/* Not found, try VINI */
		lxr = vpd_find(kwvpd, kwvpd_sz, "VINI",
			       "LX",  NULL);
		if (lxr)
			lx_idx = VPD_LOAD_LXRN_VINI;
	}
	if (!lxr) {
		prlog(PR_DEBUG, "CEC:     LXR%x not found !\n", lx_idx);
		return false;
	}

	prlog(PR_DEBUG, "CEC:     LXRn=%d LXR=%016lx\n", lx_idx,
	      lxr ? *(unsigned long *)lxr : 0);
	prlog(PR_DEBUG, "CEC:     LX Info added to %llx\n", (long long)hn);

	/* Add the LX info */
	if (!dt_has_node_property(hn, "ibm,vpd-lx-info", NULL)) {
		dt_add_property_cells(hn, "ibm,vpd-lx-info",
				      lx_idx,
				      ((uint32_t *)lxr)[0],
				      ((uint32_t *)lxr)[1]);
	}

	return true;
}


static void io_get_loc_code(const void *sp_iohubs, struct dt_node *hn, const char *prop_name)
{
	const struct spira_fru_id *fru_id;
	unsigned int fru_id_sz;
	char loc_code[LOC_CODE_SIZE + 1];
	const char *slca_loc_code;

	/* Find SLCA Index */
	fru_id = HDIF_get_idata(sp_iohubs, CECHUB_FRU_ID_DATA, &fru_id_sz);
	if (fru_id) {
		memset(loc_code, 0, sizeof(loc_code));

		/* Find LOC Code from SLCA Index */
		slca_loc_code = slca_get_loc_code_index(be16_to_cpu(fru_id->slca_index));
		if (slca_loc_code) {
			strncpy(loc_code, slca_loc_code, LOC_CODE_SIZE);
			if (!dt_has_node_property(hn, prop_name, NULL)) {
				dt_add_property(hn, prop_name, loc_code,
						strlen(loc_code) + 1);
			}
			prlog(PR_DEBUG, "CEC:     %s: %s (SLCA rsrc 0x%x)\n",
			      prop_name, loc_code,
			      be16_to_cpu(fru_id->rsrc_id));
		} else {
			prlog(PR_DEBUG, "CEC:     SLCA Loc not found: "
			      "index %d\n", fru_id->slca_index);
		}
	} else {
		prlog(PR_DEBUG, "CEC:     Hub FRU ID not found...\n");
	}
}

static struct dt_node *io_add_p7ioc(const struct cechub_io_hub *hub,
				    const void *sp_iohubs)
{
	struct dt_node *hn;
	uint64_t reg[2];

	const void *kwvpd;
	unsigned int kwvpd_sz;

	prlog(PR_DEBUG, "    GX#%d BUID_Ext = 0x%x\n",
	      be32_to_cpu(hub->gx_index),
	      be32_to_cpu(hub->buid_ext));
	prlog(PR_DEBUG, "    GX BAR 0 = 0x%016"PRIx64"\n",
	      be64_to_cpu(hub->gx_ctrl_bar0));
	prlog(PR_DEBUG, "    GX BAR 1 = 0x%016"PRIx64"\n",
	      be64_to_cpu(hub->gx_ctrl_bar1));
	prlog(PR_DEBUG, "    GX BAR 2 = 0x%016"PRIx64"\n",
	      be64_to_cpu(hub->gx_ctrl_bar2));
	prlog(PR_DEBUG, "    GX BAR 3 = 0x%016"PRIx64"\n",
	      be64_to_cpu(hub->gx_ctrl_bar3));
	prlog(PR_DEBUG, "    GX BAR 4 = 0x%016"PRIx64"\n",
	      be64_to_cpu(hub->gx_ctrl_bar4));

	/* We only know about memory map 1 */
	if (be32_to_cpu(hub->mem_map_vers) != 1) {
		prerror("P7IOC: Unknown memory map %d\n", be32_to_cpu(hub->mem_map_vers));
		/* We try to continue anyway ... */
	}

	reg[0] = cleanup_addr(be64_to_cpu(hub->gx_ctrl_bar1));
	reg[1] = 0x2000000;

	hn = dt_new_addr(dt_root, "io-hub", reg[0]);
	if (!hn)
		return NULL;

	dt_add_property(hn, "reg", reg, sizeof(reg));
	dt_add_property_strings(hn, "compatible", "ibm,p7ioc", "ibm,ioda-hub");

	kwvpd = HDIF_get_idata(sp_iohubs, CECHUB_ASCII_KEYWORD_VPD, &kwvpd_sz);
	if (kwvpd && kwvpd != sp_iohubs) {
		/*
		 * XX We don't know how to properly find the LXRn
		 * record so for now we'll just try LXR0 and if not
		 * found, we try LXR1
		 */
		if (!io_get_lx_info(kwvpd, kwvpd_sz, 0, hn))
			io_get_lx_info(kwvpd, kwvpd_sz, 1, hn);
	} else {
		prlog(PR_DEBUG, "CEC:     P7IOC Keywords not found.\n");
	}

	io_get_loc_code(sp_iohubs, hn, "ibm,io-base-loc-code");

	return hn;
}

static struct dt_node *io_add_phb3(const struct cechub_io_hub *hub,
				   const struct HDIF_common_hdr *sp_iohubs,
				   unsigned int index, struct dt_node *xcom,
				   unsigned int pe_xscom,
				   unsigned int pci_xscom,
				   unsigned int spci_xscom)
{
	struct dt_node *pbcq;
	uint32_t reg[6];
	unsigned int hdif_vers;

	/* Get HDIF version */
	hdif_vers = be16_to_cpu(sp_iohubs->version);

	/* Create PBCQ node under xscom */
	pbcq = dt_new_addr(xcom, "pbcq", pe_xscom);
	if (!pbcq)
		return NULL;

	/* "reg" property contains in order the PE, PCI and SPCI XSCOM
	 * addresses
	 */
	reg[0] = pe_xscom;
	reg[1] = 0x20;
	reg[2] = pci_xscom;
	reg[3] = 0x05;
	reg[4] = spci_xscom;
	reg[5] = 0x15;
	dt_add_property(pbcq, "reg", reg, sizeof(reg));

	/* A couple more things ... */
	dt_add_property_strings(pbcq, "compatible", "ibm,power8-pbcq");
	dt_add_property_cells(pbcq, "ibm,phb-index", index);
	dt_add_property_cells(pbcq, "ibm,hub-id", be16_to_cpu(hub->hub_num));

	/* The loc code of the PHB itself is different from the base
	 * loc code of the slots (It's actually the DCM's loc code).
	 */
	io_get_loc_code(sp_iohubs, pbcq, "ibm,loc-code");

	/* We indicate that this is an IBM setup, which means that
	 * the presence detect A/B bits are meaningful. So far we
	 * don't know whether they make any sense on customer setups
	 * so we only set that when booting with HDAT
	 */
	dt_add_property(pbcq, "ibm,use-ab-detect", NULL, 0);

	/* HDAT spec has these in version 0x6A and later */
	if (hdif_vers >= 0x6a) {
		u64 eq0 = be64_to_cpu(hub->phb_lane_eq[index][0]);
		u64 eq1 = be64_to_cpu(hub->phb_lane_eq[index][1]);
		u64 eq2 = be64_to_cpu(hub->phb_lane_eq[index][2]);
		u64 eq3 = be64_to_cpu(hub->phb_lane_eq[index][3]);
		dt_add_property_cells(pbcq, "ibm,lane-eq",
				      hi32(eq0), lo32(eq0),
				      hi32(eq1), lo32(eq1),
				      hi32(eq2), lo32(eq2),
				      hi32(eq3), lo32(eq3));
	}

	/* Currently we only create a PBCQ node, the actual PHB nodes
	 * will be added by sapphire later on.
	 */
	return pbcq;
}

static struct dt_node *io_add_p8(const struct cechub_io_hub *hub,
				 const struct HDIF_common_hdr *sp_iohubs)
{
	struct dt_node *xscom;
	unsigned int i, chip_id;

	chip_id = pcid_to_chip_id(be32_to_cpu(hub->proc_chip_id));

	prlog(PR_INFO, "CEC:     HW CHIP=0x%x, HW TOPO=0x%04x\n", chip_id,
	      be16_to_cpu(hub->hw_topology));

	xscom = find_xscom_for_chip(chip_id);
	if (!xscom) {
		prerror("P8: Can't find XSCOM for chip %d\n", chip_id);
		return NULL;
	}

	/* Create PHBs, max 3 */
	for (i = 0; i < 3; i++) {
		if (hub->fab_br0_pdt & (0x80 >> i))
			/* XSCOM addresses are the same on Murano and Venice */
			io_add_phb3(hub, sp_iohubs, i, xscom,
				    0x02012000 + (i * 0x400),
				    0x09012000 + (i * 0x400),
				    0x09013c00 + (i * 0x40));
	}

	/* HACK: We return the XSCOM device for the VPD info */
	return xscom;
}

static void io_add_p8_cec_vpd(const struct HDIF_common_hdr *sp_iohubs)
{
	const struct HDIF_child_ptr *iokids;
	const void *iokid;	
	const void *kwvpd;
	unsigned int kwvpd_sz;

	/* P8 LXR0 kept in IO KID Keyword VPD */
	iokids = HDIF_child_arr(sp_iohubs, CECHUB_CHILD_IO_KIDS);
	if (!CHECK_SPPTR(iokids)) {
		prlog(PR_WARNING, "CEC:     No IOKID child array !\n");
		return;
	}
	if (!iokids->count) {
		prlog(PR_WARNING, "CEC:     IOKID count is 0 !\n");
		return;
	}
	if (be32_to_cpu(iokids->count) > 1) {
		prlog(PR_WARNING, "CEC:     WARNING ! More than 1 IO KID !!! (%d)\n",
		      iokids->count);
		/* Ignoring the additional ones */
	}

	iokid = HDIF_child(sp_iohubs, iokids, 0, "IO KID");
	if (!iokid) {
		prlog(PR_WARNING, "CEC:     No IO KID structure in child array !\n");
		return;
	}

	/* Grab base location code for slots */
	io_get_loc_code(iokid, dt_root, "ibm,io-base-loc-code");

	kwvpd = HDIF_get_idata(iokid, CECHUB_ASCII_KEYWORD_VPD, &kwvpd_sz);
	if (!kwvpd) {
		prlog(PR_WARNING, "CEC:     No VPD entry in IO KID !\n");
		return;
	}

	/* Grab LX load info */
	io_get_lx_info(kwvpd, kwvpd_sz, 0, dt_root);
}

static void io_parse_fru(const void *sp_iohubs)
{
	unsigned int i;
	struct dt_node *hn;
	int count;

	count = HDIF_get_iarray_size(sp_iohubs, CECHUB_FRU_IO_HUBS);
	if (count < 1) {
		prerror("CEC: IO FRU with no chips !\n");
		return;
	}

	prlog(PR_INFO, "CEC:   %d chips in FRU\n", count);

	/* Iterate IO hub array */
	for (i = 0; i < count; i++) {
		const struct cechub_io_hub *hub;
		unsigned int size, hub_id;

		hub = HDIF_get_iarray_item(sp_iohubs, CECHUB_FRU_IO_HUBS,
					   i, &size);
		if (!hub || size < CECHUB_IOHUB_MIN_SIZE) {
			prerror("CEC:     IO-HUB Chip %d bad idata\n", i);
			continue;
		}

		switch (hub->flags & CECHUB_HUB_FLAG_STATE_MASK) {
		case CECHUB_HUB_FLAG_STATE_OK:
			prlog(PR_DEBUG, "CEC:   IO Hub Chip #%d OK\n", i);
			break;
		case CECHUB_HUB_FLAG_STATE_FAILURES:
			prlog(PR_WARNING, "CEC:   IO Hub Chip #%d OK"
			      " with failures\n", i);
			break;
		case CECHUB_HUB_FLAG_STATE_NOT_INST:
			prlog(PR_DEBUG, "CEC:   IO Hub Chip #%d"
			      " Not installed\n", i);
			continue;
		case CECHUB_HUB_FLAG_STATE_UNUSABLE:
			prlog(PR_DEBUG, "CEC:   IO Hub Chip #%d Unusable", i);
			continue;
		}

		hub_id = be16_to_cpu(hub->iohub_id);

		/* GX BAR assignment */
		prlog(PR_DEBUG, "CEC:   PChip: %d HUB ID: %04x [EC=0x%x]"
		      " Hub#=%d)\n",
		      be32_to_cpu(hub->proc_chip_id), hub_id,
		      be32_to_cpu(hub->ec_level), be16_to_cpu(hub->hub_num));

		switch(hub_id) {
		case CECHUB_HUB_P7IOC:
			prlog(PR_INFO, "CEC:     P7IOC !\n");
			hn = io_add_p7ioc(hub, sp_iohubs);
			io_add_common(hn, hub);
			break;
		case CECHUB_HUB_MURANO:
		case CECHUB_HUB_MURANO_SEGU:
			prlog(PR_INFO, "CEC:     Murano !\n");
			hn = io_add_p8(hub, sp_iohubs);
			break;
		case CECHUB_HUB_VENICE_WYATT:
			prlog(PR_INFO, "CEC:     Venice !\n");
			hn = io_add_p8(hub, sp_iohubs);
			break;
		default:
			prlog(PR_ERR, "CEC:     Hub ID 0x%04x unsupported !\n",
			      hub_id);
			hn = NULL;
		}
	}

	/* On P8, grab the CEC VPD */
	if (proc_gen == proc_gen_p8)
		io_add_p8_cec_vpd(sp_iohubs);
}

void io_parse(void)
{
	const struct HDIF_common_hdr *sp_iohubs;
	unsigned int i, size;

	/* Look for IO Hubs */
	if (!get_hdif(&spira.ntuples.cec_iohub_fru, "IO HUB")) {
		prerror("CEC: Cannot locate IO Hub FRU data !\n");
		return;
	}

	/*
	 * Note about LXRn numbering ...
	 *
	 * I can't completely make sense of what that is supposed to be, so
	 * for now, what we do is look for the first one we can find and
	 * increment it for each chip. Works for the machines I have here
	 */

	for_each_ntuple_idx(&spira.ntuples.cec_iohub_fru, sp_iohubs, i,
			    CECHUB_FRU_HDIF_SIG) {
		const struct cechub_hub_fru_id *fru_id_data;
		unsigned int type;
		static const char *typestr[] = {
			"Reservation",
			"Card",
			"CPU Card",
			"Backplane",
			"Backplane Extension"
		};
		fru_id_data = HDIF_get_idata(sp_iohubs, CECHUB_FRU_ID_DATA_AREA,
					     &size);
		if (!fru_id_data || size < sizeof(struct cechub_hub_fru_id)) {
			prerror("CEC: IO-HUB FRU %d, bad ID data\n", i);
			continue;
		}
		type = be32_to_cpu(fru_id_data->card_type);

		prlog(PR_INFO, "CEC: HUB FRU %d is %s\n",
		      i, type > 4 ? "Unknown" : typestr[type]);

		/*
		 * We currently only handle the backplane (Juno) and
		 * processor FRU (P8 machines)
		 */
		if (type != CECHUB_FRU_TYPE_CEC_BKPLANE &&
		    type != CECHUB_FRU_TYPE_CPU_CARD) {
			prerror("CEC:   Unsupported type\n");
			continue;
		}

		/* We don't support Hubs connected to pass-through ports */
		if (fru_id_data->flags & (CECHUB_FRU_FLAG_HEADLESS |
					  CECHUB_FRU_FLAG_PASSTHROUGH)) {
			prerror("CEC:   Headless or Passthrough unsupported\n");
			continue;
		}

		/* Ok, we have a reasonable candidate */
		io_parse_fru(sp_iohubs);
	}
}

OpenPOWER on IntegriCloud