aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/cell/spu_manage.c
blob: 2bb6977c0a5aeee65b2f83400af8198fded3c543 (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
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
/*
 * spu management operations for of based platforms
 *
 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
 * Copyright 2006 Sony Corp.
 * (C) Copyright 2007 TOSHIBA CORPORATION
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/export.h>
#include <linux/ptrace.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/device.h>

#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/firmware.h>
#include <asm/prom.h>

#include "spufs/spufs.h"
#include "interrupt.h"

struct device_node *spu_devnode(struct spu *spu)
{
	return spu->devnode;
}

EXPORT_SYMBOL_GPL(spu_devnode);

static u64 __init find_spu_unit_number(struct device_node *spe)
{
	const unsigned int *prop;
	int proplen;

	/* new device trees should provide the physical-id attribute */
	prop = of_get_property(spe, "physical-id", &proplen);
	if (proplen == 4)
		return (u64)*prop;

	/* celleb device tree provides the unit-id */
	prop = of_get_property(spe, "unit-id", &proplen);
	if (proplen == 4)
		return (u64)*prop;

	/* legacy device trees provide the id in the reg attribute */
	prop = of_get_property(spe, "reg", &proplen);
	if (proplen == 4)
		return (u64)*prop;

	return 0;
}

static void spu_unmap(struct spu *spu)
{
	if (!firmware_has_feature(FW_FEATURE_LPAR))
		iounmap(spu->priv1);
	iounmap(spu->priv2);
	iounmap(spu->problem);
	iounmap((__force u8 __iomem *)spu->local_store);
}

static int __init spu_map_interrupts_old(struct spu *spu,
	struct device_node *np)
{
	unsigned int isrc;
	const u32 *tmp;
	int nid;

	/* Get the interrupt source unit from the device-tree */
	tmp = of_get_property(np, "isrc", NULL);
	if (!tmp)
		return -ENODEV;
	isrc = tmp[0];

	tmp = of_get_property(np->parent->parent, "node-id", NULL);
	if (!tmp) {
		printk(KERN_WARNING "%s: can't find node-id\n", __func__);
		nid = spu->node;
	} else
		nid = tmp[0];

	/* Add the node number */
	isrc |= nid << IIC_IRQ_NODE_SHIFT;

	/* Now map interrupts of all 3 classes */
	spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
	spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
	spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);

	/* Right now, we only fail if class 2 failed */
	return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
}

static void __iomem * __init spu_map_prop_old(struct spu *spu,
					      struct device_node *n,
					      const char *name)
{
	const struct address_prop {
		unsigned long address;
		unsigned int len;
	} __attribute__((packed)) *prop;
	int proplen;

	prop = of_get_property(n, name, &proplen);
	if (prop == NULL || proplen != sizeof (struct address_prop))
		return NULL;

	return ioremap(prop->address, prop->len);
}

static int __init spu_map_device_old(struct spu *spu)
{
	struct device_node *node = spu->devnode;
	const char *prop;
	int ret;

	ret = -ENODEV;
	spu->name = of_get_property(node, "name", NULL);
	if (!spu->name)
		goto out;

	prop = of_get_property(node, "local-store", NULL);
	if (!prop)
		goto out;
	spu->local_store_phys = *(unsigned long *)prop;

	/* we use local store as ram, not io memory */
	spu->local_store = (void __force *)
		spu_map_prop_old(spu, node, "local-store");
	if (!spu->local_store)
		goto out;

	prop = of_get_property(node, "problem", NULL);
	if (!prop)
		goto out_unmap;
	spu->problem_phys = *(unsigned long *)prop;

	spu->problem = spu_map_prop_old(spu, node, "problem");
	if (!spu->problem)
		goto out_unmap;

	spu->priv2 = spu_map_prop_old(spu, node, "priv2");
	if (!spu->priv2)
		goto out_unmap;

	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
		spu->priv1 = spu_map_prop_old(spu, node, "priv1");
		if (!spu->priv1)
			goto out_unmap;
	}

	ret = 0;
	goto out;

out_unmap:
	spu_unmap(spu);
out:
	return ret;
}

static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
{
	struct of_irq oirq;
	int ret;
	int i;

	for (i=0; i < 3; i++) {
		ret = of_irq_map_one(np, i, &oirq);
		if (ret) {
			pr_debug("spu_new: failed to get irq %d\n", i);
			goto err;
		}
		ret = -EINVAL;
		pr_debug("  irq %d no 0x%x on %s\n", i, oirq.specifier[0],
			 oirq.controller->full_name);
		spu->irqs[i] = irq_create_of_mapping(oirq.controller,
					oirq.specifier, oirq.size);
		if (spu->irqs[i] == NO_IRQ) {
			pr_debug("spu_new: failed to map it !\n");
			goto err;
		}
	}
	return 0;

err:
	pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier,
		spu->name);
	for (; i >= 0; i--) {
		if (spu->irqs[i] != NO_IRQ)
			irq_dispose_mapping(spu->irqs[i]);
	}
	return ret;
}

static int spu_map_resource(struct spu *spu, int nr,
			    void __iomem** virt, unsigned long *phys)
{
	struct device_node *np = spu->devnode;
	struct resource resource = { };
	unsigned long len;
	int ret;

	ret = of_address_to_resource(np, nr, &resource);
	if (ret)
		return ret;
	if (phys)
		*phys = resource.start;
	len = resource_size(&resource);
	*virt = ioremap(resource.start, len);
	if (!*virt)
		return -EINVAL;
	return 0;
}

static int __init spu_map_device(struct spu *spu)
{
	struct device_node *np = spu->devnode;
	int ret = -ENODEV;

	spu->name = of_get_property(np, "name", NULL);
	if (!spu->name)
		goto out;

	ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
			       &spu->local_store_phys);
	if (ret) {
		pr_debug("spu_new: failed to map %s resource 0\n",
			 np->full_name);
		goto out;
	}
	ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
			       &spu->problem_phys);
	if (ret) {
		pr_debug("spu_new: failed to map %s resource 1\n",
			 np->full_name);
		goto out_unmap;
	}
	ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
	if (ret) {
		pr_debug("spu_new: failed to map %s resource 2\n",
			 np->full_name);
		goto out_unmap;
	}
	if (!firmware_has_feature(FW_FEATURE_LPAR))
		ret = spu_map_resource(spu, 3,
			       (void __iomem**)&spu->priv1, NULL);
	if (ret) {
		pr_debug("spu_new: failed to map %s resource 3\n",
			 np->full_name);
		goto out_unmap;
	}
	pr_debug("spu_new: %s maps:\n", np->full_name);
	pr_debug("  local store   : 0x%016lx -> 0x%p\n",
		 spu->local_store_phys, spu->local_store);
	pr_debug("  problem state : 0x%016lx -> 0x%p\n",
		 spu->problem_phys, spu->problem);
	pr_debug("  priv2         :                       0x%p\n", spu->priv2);
	pr_debug("  priv1         :                       0x%p\n", spu->priv1);

	return 0;

out_unmap:
	spu_unmap(spu);
out:
	pr_debug("failed to map spe %s: %d\n", spu->name, ret);
	return ret;
}

static int __init of_enumerate_spus(int (*fn)(void *data))
{
	int ret;
	struct device_node *node;
	unsigned int n = 0;

	ret = -ENODEV;
	for (node = of_find_node_by_type(NULL, "spe");
			node; node = of_find_node_by_type(node, "spe")) {
		ret = fn(node);
		if (ret) {
			printk(KERN_WARNING "%s: Error initializing %s\n",
				__func__, node->name);
			break;
		}
		n++;
	}
	return ret ? ret : n;
}

static int __init of_create_spu(struct spu *spu, void *data)
{
	int ret;
	struct device_node *spe = (struct device_node *)data;
	static int legacy_map = 0, legacy_irq = 0;

	spu->devnode = of_node_get(spe);
	spu->spe_id = find_spu_unit_number(spe);

	spu->node = of_node_to_nid(spe);
	if (spu->node >= MAX_NUMNODES) {
		printk(KERN_WARNING "SPE %s on node %d ignored,"
		       " node number too big\n", spe->full_name, spu->node);
		printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
		ret = -ENODEV;
		goto out;
	}

	ret = spu_map_device(spu);
	if (ret) {
		if (!legacy_map) {
			legacy_map = 1;
			printk(KERN_WARNING "%s: Legacy device tree found, "
				"trying to map old style\n", __func__);
		}
		ret = spu_map_device_old(spu);
		if (ret) {
			printk(KERN_ERR "Unable to map %s\n",
				spu->name);
			goto out;
		}
	}

	ret = spu_map_interrupts(spu, spe);
	if (ret) {
		if (!legacy_irq) {
			legacy_irq = 1;
			printk(KERN_WARNING "%s: Legacy device tree found, "
				"trying old style irq\n", __func__);
		}
		ret = spu_map_interrupts_old(spu, spe);
		if (ret) {
			printk(KERN_ERR "%s: could not map interrupts\n",
				spu->name);
			goto out_unmap;
		}
	}

	pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
		spu->local_store, spu->problem, spu->priv1,
		spu->priv2, spu->number);
	goto out;

out_unmap:
	spu_unmap(spu);
out:
	return ret;
}

static int of_destroy_spu(struct spu *spu)
{
	spu_unmap(spu);
	of_node_put(spu->devnode);
	return 0;
}

static void enable_spu_by_master_run(struct spu_context *ctx)
{
	ctx->ops->master_start(ctx);
}

static void disable_spu_by_master_run(struct spu_context *ctx)
{
	ctx->ops->master_stop(ctx);
}

/* Hardcoded affinity idxs for qs20 */
#define QS20_SPES_PER_BE 8
static int qs20_reg_idxs[QS20_SPES_PER_BE] =   { 0, 2, 4, 6, 7, 5, 3, 1 };
static int qs20_reg_memory[QS20_SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };

static struct spu *spu_lookup_reg(int node, u32 reg)
{
	struct spu *spu;
	const u32 *spu_reg;

	list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
		spu_reg = of_get_property(spu_devnode(spu), "reg", NULL);
		if (*spu_reg == reg)
			return spu;
	}
	return NULL;
}

static void init_affinity_qs20_harcoded(void)
{
	int node, i;
	struct spu *last_spu, *spu;
	u32 reg;

	for (node = 0; node < MAX_NUMNODES; node++) {
		last_spu = NULL;
		for (i = 0; i < QS20_SPES_PER_BE; i++) {
			reg = qs20_reg_idxs[i];
			spu = spu_lookup_reg(node, reg);
			if (!spu)
				continue;
			spu->has_mem_affinity = qs20_reg_memory[reg];
			if (last_spu)
				list_add_tail(&spu->aff_list,
						&last_spu->aff_list);
			last_spu = spu;
		}
	}
}

static int of_has_vicinity(void)
{
	struct device_node *dn;

	for_each_node_by_type(dn, "spe") {
		if (of_find_property(dn, "vicinity", NULL))  {
			of_node_put(dn);
			return 1;
		}
	}
	return 0;
}

static struct spu *devnode_spu(int cbe, struct device_node *dn)
{
	struct spu *spu;

	list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list)
		if (spu_devnode(spu) == dn)
			return spu;
	return NULL;
}

static struct spu *
neighbour_spu(int cbe, struct device_node *target, struct device_node *avoid)
{
	struct spu *spu;
	struct device_node *spu_dn;
	const phandle *vic_handles;
	int lenp, i;

	list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list) {
		spu_dn = spu_devnode(spu);
		if (spu_dn == avoid)
			continue;
		vic_handles = of_get_property(spu_dn, "vicinity", &lenp);
		for (i=0; i < (lenp / sizeof(phandle)); i++) {
			if (vic_handles[i] == target->phandle)
				return spu;
		}
	}
	return NULL;
}

static void init_affinity_node(int cbe)
{
	struct spu *spu, *last_spu;
	struct device_node *vic_dn, *last_spu_dn;
	phandle avoid_ph;
	const phandle *vic_handles;
	const char *name;
	int lenp, i, added;

	last_spu = list_first_entry(&cbe_spu_info[cbe].spus, struct spu,
								cbe_list);
	avoid_ph = 0;
	for (added = 1; added < cbe_spu_info[cbe].n_spus; added++) {
		last_spu_dn = spu_devnode(last_spu);
		vic_handles = of_get_property(last_spu_dn, "vicinity", &lenp);

		/*
		 * Walk through each phandle in vicinity property of the spu
		 * (tipically two vicinity phandles per spe node)
		 */
		for (i = 0; i < (lenp / sizeof(phandle)); i++) {
			if (vic_handles[i] == avoid_ph)
				continue;

			vic_dn = of_find_node_by_phandle(vic_handles[i]);
			if (!vic_dn)
				continue;

			/* a neighbour might be spe, mic-tm, or bif0 */
			name = of_get_property(vic_dn, "name", NULL);
			if (!name)
				continue;

			if (strcmp(name, "spe") == 0) {
				spu = devnode_spu(cbe, vic_dn);
				avoid_ph = last_spu_dn->phandle;
			} else {
				/*
				 * "mic-tm" and "bif0" nodes do not have
				 * vicinity property. So we need to find the
				 * spe which has vic_dn as neighbour, but
				 * skipping the one we came from (last_spu_dn)
				 */
				spu = neighbour_spu(cbe, vic_dn, last_spu_dn);
				if (!spu)
					continue;
				if (!strcmp(name, "mic-tm")) {
					last_spu->has_mem_affinity = 1;
					spu->has_mem_affinity = 1;
				}
				avoid_ph = vic_dn->phandle;
			}

			list_add_tail(&spu->aff_list, &last_spu->aff_list);
			last_spu = spu;
			break;
		}
	}
}

static void init_affinity_fw(void)
{
	int cbe;

	for (cbe = 0; cbe < MAX_NUMNODES; cbe++)
		init_affinity_node(cbe);
}

static int __init init_affinity(void)
{
	if (of_has_vicinity()) {
		init_affinity_fw();
	} else {
		long root = of_get_flat_dt_root();
		if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
			init_affinity_qs20_harcoded();
		else
			printk("No affinity configuration found\n");
	}

	return 0;
}

const struct spu_management_ops spu_management_of_ops = {
	.enumerate_spus = of_enumerate_spus,
	.create_spu = of_create_spu,
	.destroy_spu = of_destroy_spu,
	.enable_spu = enable_spu_by_master_run,
	.disable_spu = disable_spu_by_master_run,
	.init_affinity = init_affinity,
};