summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/ps3/spu.c
blob: 375a9f92158d48d5a7996d5ace60f7c551bf4ff4 (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
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
/*
 *  PS3 Platform spu routines.
 *
 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
 *  Copyright 2006 Sony Corp.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/mmzone.h>
#include <linux/io.h>
#include <linux/mm.h>

#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/lv1call.h>
#include <asm/ps3.h>

#include "../cell/spufs/spufs.h"
#include "platform.h"

/* spu_management_ops */

/**
 * enum spe_type - Type of spe to create.
 * @spe_type_logical: Standard logical spe.
 *
 * For use with lv1_construct_logical_spe().  The current HV does not support
 * any types other than those listed.
 */

enum spe_type {
	SPE_TYPE_LOGICAL = 0,
};

/**
 * struct spe_shadow - logical spe shadow register area.
 *
 * Read-only shadow of spe registers.
 */

struct spe_shadow {
	u8 padding_0140[0x0140];
	u64 int_status_class0_RW;       /* 0x0140 */
	u64 int_status_class1_RW;       /* 0x0148 */
	u64 int_status_class2_RW;       /* 0x0150 */
	u8 padding_0158[0x0610-0x0158];
	u64 mfc_dsisr_RW;               /* 0x0610 */
	u8 padding_0618[0x0620-0x0618];
	u64 mfc_dar_RW;                 /* 0x0620 */
	u8 padding_0628[0x0800-0x0628];
	u64 mfc_dsipr_R;                /* 0x0800 */
	u8 padding_0808[0x0810-0x0808];
	u64 mfc_lscrr_R;                /* 0x0810 */
	u8 padding_0818[0x0c00-0x0818];
	u64 mfc_cer_R;                  /* 0x0c00 */
	u8 padding_0c08[0x0f00-0x0c08];
	u64 spe_execution_status;       /* 0x0f00 */
	u8 padding_0f08[0x1000-0x0f08];
};

/**
 * enum spe_ex_state - Logical spe execution state.
 * @spe_ex_state_unexecutable: Uninitialized.
 * @spe_ex_state_executable: Enabled, not ready.
 * @spe_ex_state_executed: Ready for use.
 *
 * The execution state (status) of the logical spe as reported in
 * struct spe_shadow:spe_execution_status.
 */

enum spe_ex_state {
	SPE_EX_STATE_UNEXECUTABLE = 0,
	SPE_EX_STATE_EXECUTABLE = 2,
	SPE_EX_STATE_EXECUTED = 3,
};

/**
 * struct priv1_cache - Cached values of priv1 registers.
 * @masks[]: Array of cached spe interrupt masks, indexed by class.
 * @sr1: Cached mfc_sr1 register.
 * @tclass_id: Cached mfc_tclass_id register.
 */

struct priv1_cache {
	u64 masks[3];
	u64 sr1;
	u64 tclass_id;
};

/**
 * struct spu_pdata - Platform state variables.
 * @spe_id: HV spe id returned by lv1_construct_logical_spe().
 * @resource_id: HV spe resource id returned by
 * 	ps3_repository_read_spe_resource_id().
 * @priv2_addr: lpar address of spe priv2 area returned by
 * 	lv1_construct_logical_spe().
 * @shadow_addr: lpar address of spe register shadow area returned by
 * 	lv1_construct_logical_spe().
 * @shadow: Virtual (ioremap) address of spe register shadow area.
 * @cache: Cached values of priv1 registers.
 */

struct spu_pdata {
	u64 spe_id;
	u64 resource_id;
	u64 priv2_addr;
	u64 shadow_addr;
	struct spe_shadow __iomem *shadow;
	struct priv1_cache cache;
};

static struct spu_pdata *spu_pdata(struct spu *spu)
{
	return spu->pdata;
}

#define dump_areas(_a, _b, _c, _d, _e) \
	_dump_areas(_a, _b, _c, _d, _e, __func__, __LINE__)
static void _dump_areas(unsigned int spe_id, unsigned long priv2,
	unsigned long problem, unsigned long ls, unsigned long shadow,
	const char* func, int line)
{
	pr_debug("%s:%d: spe_id:  %xh (%u)\n", func, line, spe_id, spe_id);
	pr_debug("%s:%d: priv2:   %lxh\n", func, line, priv2);
	pr_debug("%s:%d: problem: %lxh\n", func, line, problem);
	pr_debug("%s:%d: ls:      %lxh\n", func, line, ls);
	pr_debug("%s:%d: shadow:  %lxh\n", func, line, shadow);
}

inline u64 ps3_get_spe_id(void *arg)
{
	return spu_pdata(arg)->spe_id;
}
EXPORT_SYMBOL_GPL(ps3_get_spe_id);

static unsigned long get_vas_id(void)
{
	u64 id;

	lv1_get_logical_ppe_id(&id);
	lv1_get_virtual_address_space_id_of_ppe(id, &id);

	return id;
}

static int __init construct_spu(struct spu *spu)
{
	int result;
	u64 unused;
	u64 problem_phys;
	u64 local_store_phys;

	result = lv1_construct_logical_spe(PAGE_SHIFT, PAGE_SHIFT, PAGE_SHIFT,
		PAGE_SHIFT, PAGE_SHIFT, get_vas_id(), SPE_TYPE_LOGICAL,
		&spu_pdata(spu)->priv2_addr, &problem_phys,
		&local_store_phys, &unused,
		&spu_pdata(spu)->shadow_addr,
		&spu_pdata(spu)->spe_id);
	spu->problem_phys = problem_phys;
	spu->local_store_phys = local_store_phys;

	if (result) {
		pr_debug("%s:%d: lv1_construct_logical_spe failed: %s\n",
			__func__, __LINE__, ps3_result(result));
		return result;
	}

	return result;
}

static void spu_unmap(struct spu *spu)
{
	iounmap(spu->priv2);
	iounmap(spu->problem);
	iounmap((__force u8 __iomem *)spu->local_store);
	iounmap(spu_pdata(spu)->shadow);
}

/**
 * setup_areas - Map the spu regions into the address space.
 *
 * The current HV requires the spu shadow regs to be mapped with the
 * PTE page protection bits set as read-only (PP=3).  This implementation
 * uses the low level __ioremap() to bypass the page protection settings
 * inforced by ioremap_prot() to get the needed PTE bits set for the
 * shadow regs.
 */

static int __init setup_areas(struct spu *spu)
{
	struct table {char* name; unsigned long addr; unsigned long size;};
	static const unsigned long shadow_flags = _PAGE_NO_CACHE | 3;

	spu_pdata(spu)->shadow = __ioremap(spu_pdata(spu)->shadow_addr,
					   sizeof(struct spe_shadow),
					   shadow_flags);
	if (!spu_pdata(spu)->shadow) {
		pr_debug("%s:%d: ioremap shadow failed\n", __func__, __LINE__);
		goto fail_ioremap;
	}

	spu->local_store = (__force void *)ioremap_prot(spu->local_store_phys,
		LS_SIZE, _PAGE_NO_CACHE);

	if (!spu->local_store) {
		pr_debug("%s:%d: ioremap local_store failed\n",
			__func__, __LINE__);
		goto fail_ioremap;
	}

	spu->problem = ioremap(spu->problem_phys,
		sizeof(struct spu_problem));

	if (!spu->problem) {
		pr_debug("%s:%d: ioremap problem failed\n", __func__, __LINE__);
		goto fail_ioremap;
	}

	spu->priv2 = ioremap(spu_pdata(spu)->priv2_addr,
		sizeof(struct spu_priv2));

	if (!spu->priv2) {
		pr_debug("%s:%d: ioremap priv2 failed\n", __func__, __LINE__);
		goto fail_ioremap;
	}

	dump_areas(spu_pdata(spu)->spe_id, spu_pdata(spu)->priv2_addr,
		spu->problem_phys, spu->local_store_phys,
		spu_pdata(spu)->shadow_addr);
	dump_areas(spu_pdata(spu)->spe_id, (unsigned long)spu->priv2,
		(unsigned long)spu->problem, (unsigned long)spu->local_store,
		(unsigned long)spu_pdata(spu)->shadow);

	return 0;

fail_ioremap:
	spu_unmap(spu);

	return -ENOMEM;
}

static int __init setup_interrupts(struct spu *spu)
{
	int result;

	result = ps3_spe_irq_setup(PS3_BINDING_CPU_ANY, spu_pdata(spu)->spe_id,
		0, &spu->irqs[0]);

	if (result)
		goto fail_alloc_0;

	result = ps3_spe_irq_setup(PS3_BINDING_CPU_ANY, spu_pdata(spu)->spe_id,
		1, &spu->irqs[1]);

	if (result)
		goto fail_alloc_1;

	result = ps3_spe_irq_setup(PS3_BINDING_CPU_ANY, spu_pdata(spu)->spe_id,
		2, &spu->irqs[2]);

	if (result)
		goto fail_alloc_2;

	return result;

fail_alloc_2:
	ps3_spe_irq_destroy(spu->irqs[1]);
fail_alloc_1:
	ps3_spe_irq_destroy(spu->irqs[0]);
fail_alloc_0:
	spu->irqs[0] = spu->irqs[1] = spu->irqs[2] = NO_IRQ;
	return result;
}

static int __init enable_spu(struct spu *spu)
{
	int result;

	result = lv1_enable_logical_spe(spu_pdata(spu)->spe_id,
		spu_pdata(spu)->resource_id);

	if (result) {
		pr_debug("%s:%d: lv1_enable_logical_spe failed: %s\n",
			__func__, __LINE__, ps3_result(result));
		goto fail_enable;
	}

	result = setup_areas(spu);

	if (result)
		goto fail_areas;

	result = setup_interrupts(spu);

	if (result)
		goto fail_interrupts;

	return 0;

fail_interrupts:
	spu_unmap(spu);
fail_areas:
	lv1_disable_logical_spe(spu_pdata(spu)->spe_id, 0);
fail_enable:
	return result;
}

static int ps3_destroy_spu(struct spu *spu)
{
	int result;

	pr_debug("%s:%d spu_%d\n", __func__, __LINE__, spu->number);

	result = lv1_disable_logical_spe(spu_pdata(spu)->spe_id, 0);
	BUG_ON(result);

	ps3_spe_irq_destroy(spu->irqs[2]);
	ps3_spe_irq_destroy(spu->irqs[1]);
	ps3_spe_irq_destroy(spu->irqs[0]);

	spu->irqs[0] = spu->irqs[1] = spu->irqs[2] = NO_IRQ;

	spu_unmap(spu);

	result = lv1_destruct_logical_spe(spu_pdata(spu)->spe_id);
	BUG_ON(result);

	kfree(spu->pdata);
	spu->pdata = NULL;

	return 0;
}

static int __init ps3_create_spu(struct spu *spu, void *data)
{
	int result;

	pr_debug("%s:%d spu_%d\n", __func__, __LINE__, spu->number);

	spu->pdata = kzalloc(sizeof(struct spu_pdata),
		GFP_KERNEL);

	if (!spu->pdata) {
		result = -ENOMEM;
		goto fail_malloc;
	}

	spu_pdata(spu)->resource_id = (unsigned long)data;

	/* Init cached reg values to HV defaults. */

	spu_pdata(spu)->cache.sr1 = 0x33;

	result = construct_spu(spu);

	if (result)
		goto fail_construct;

	/* For now, just go ahead and enable it. */

	result = enable_spu(spu);

	if (result)
		goto fail_enable;

	/* Make sure the spu is in SPE_EX_STATE_EXECUTED. */

	/* need something better here!!! */
	while (in_be64(&spu_pdata(spu)->shadow->spe_execution_status)
		!= SPE_EX_STATE_EXECUTED)
		(void)0;

	return result;

fail_enable:
fail_construct:
	ps3_destroy_spu(spu);
fail_malloc:
	return result;
}

static int __init ps3_enumerate_spus(int (*fn)(void *data))
{
	int result;
	unsigned int num_resource_id;
	unsigned int i;

	result = ps3_repository_read_num_spu_resource_id(&num_resource_id);

	pr_debug("%s:%d: num_resource_id %u\n", __func__, __LINE__,
		num_resource_id);

	/*
	 * For now, just create logical spus equal to the number
	 * of physical spus reserved for the partition.
	 */

	for (i = 0; i < num_resource_id; i++) {
		enum ps3_spu_resource_type resource_type;
		unsigned int resource_id;

		result = ps3_repository_read_spu_resource_id(i,
			&resource_type, &resource_id);

		if (result)
			break;

		if (resource_type == PS3_SPU_RESOURCE_TYPE_EXCLUSIVE) {
			result = fn((void*)(unsigned long)resource_id);

			if (result)
				break;
		}
	}

	if (result) {
		printk(KERN_WARNING "%s:%d: Error initializing spus\n",
			__func__, __LINE__);
		return result;
	}

	return num_resource_id;
}

static int ps3_init_affinity(void)
{
	return 0;
}

/**
 * ps3_enable_spu - Enable SPU run control.
 *
 * An outstanding enhancement for the PS3 would be to add a guard to check
 * for incorrect access to the spu problem state when the spu context is
 * disabled.  This check could be implemented with a flag added to the spu
 * context that would inhibit mapping problem state pages, and a routine
 * to unmap spu problem state pages.  When the spu is enabled with
 * ps3_enable_spu() the flag would be set allowing pages to be mapped,
 * and when the spu is disabled with ps3_disable_spu() the flag would be
 * cleared and the mapped problem state pages would be unmapped.
 */

static void ps3_enable_spu(struct spu_context *ctx)
{
}

static void ps3_disable_spu(struct spu_context *ctx)
{
	ctx->ops->runcntl_stop(ctx);
}

const struct spu_management_ops spu_management_ps3_ops = {
	.enumerate_spus = ps3_enumerate_spus,
	.create_spu = ps3_create_spu,
	.destroy_spu = ps3_destroy_spu,
	.enable_spu = ps3_enable_spu,
	.disable_spu = ps3_disable_spu,
	.init_affinity = ps3_init_affinity,
};

/* spu_priv1_ops */

static void int_mask_and(struct spu *spu, int class, u64 mask)
{
	u64 old_mask;

	/* are these serialized by caller??? */
	old_mask = spu_int_mask_get(spu, class);
	spu_int_mask_set(spu, class, old_mask & mask);
}

static void int_mask_or(struct spu *spu, int class, u64 mask)
{
	u64 old_mask;

	old_mask = spu_int_mask_get(spu, class);
	spu_int_mask_set(spu, class, old_mask | mask);
}

static void int_mask_set(struct spu *spu, int class, u64 mask)
{
	spu_pdata(spu)->cache.masks[class] = mask;
	lv1_set_spe_interrupt_mask(spu_pdata(spu)->spe_id, class,
		spu_pdata(spu)->cache.masks[class]);
}

static u64 int_mask_get(struct spu *spu, int class)
{
	return spu_pdata(spu)->cache.masks[class];
}

static void int_stat_clear(struct spu *spu, int class, u64 stat)
{
	/* Note that MFC_DSISR will be cleared when class1[MF] is set. */

	lv1_clear_spe_interrupt_status(spu_pdata(spu)->spe_id, class,
		stat, 0);
}

static u64 int_stat_get(struct spu *spu, int class)
{
	u64 stat;

	lv1_get_spe_interrupt_status(spu_pdata(spu)->spe_id, class, &stat);
	return stat;
}

static void cpu_affinity_set(struct spu *spu, int cpu)
{
	/* No support. */
}

static u64 mfc_dar_get(struct spu *spu)
{
	return in_be64(&spu_pdata(spu)->shadow->mfc_dar_RW);
}

static void mfc_dsisr_set(struct spu *spu, u64 dsisr)
{
	/* Nothing to do, cleared in int_stat_clear(). */
}

static u64 mfc_dsisr_get(struct spu *spu)
{
	return in_be64(&spu_pdata(spu)->shadow->mfc_dsisr_RW);
}

static void mfc_sdr_setup(struct spu *spu)
{
	/* Nothing to do. */
}

static void mfc_sr1_set(struct spu *spu, u64 sr1)
{
	/* Check bits allowed by HV. */

	static const u64 allowed = ~(MFC_STATE1_LOCAL_STORAGE_DECODE_MASK
		| MFC_STATE1_PROBLEM_STATE_MASK);

	BUG_ON((sr1 & allowed) != (spu_pdata(spu)->cache.sr1 & allowed));

	spu_pdata(spu)->cache.sr1 = sr1;
	lv1_set_spe_privilege_state_area_1_register(
		spu_pdata(spu)->spe_id,
		offsetof(struct spu_priv1, mfc_sr1_RW),
		spu_pdata(spu)->cache.sr1);
}

static u64 mfc_sr1_get(struct spu *spu)
{
	return spu_pdata(spu)->cache.sr1;
}

static void mfc_tclass_id_set(struct spu *spu, u64 tclass_id)
{
	spu_pdata(spu)->cache.tclass_id = tclass_id;
	lv1_set_spe_privilege_state_area_1_register(
		spu_pdata(spu)->spe_id,
		offsetof(struct spu_priv1, mfc_tclass_id_RW),
		spu_pdata(spu)->cache.tclass_id);
}

static u64 mfc_tclass_id_get(struct spu *spu)
{
	return spu_pdata(spu)->cache.tclass_id;
}

static void tlb_invalidate(struct spu *spu)
{
	/* Nothing to do. */
}

static void resource_allocation_groupID_set(struct spu *spu, u64 id)
{
	/* No support. */
}

static u64 resource_allocation_groupID_get(struct spu *spu)
{
	return 0; /* No support. */
}

static void resource_allocation_enable_set(struct spu *spu, u64 enable)
{
	/* No support. */
}

static u64 resource_allocation_enable_get(struct spu *spu)
{
	return 0; /* No support. */
}

const struct spu_priv1_ops spu_priv1_ps3_ops = {
	.int_mask_and = int_mask_and,
	.int_mask_or = int_mask_or,
	.int_mask_set = int_mask_set,
	.int_mask_get = int_mask_get,
	.int_stat_clear = int_stat_clear,
	.int_stat_get = int_stat_get,
	.cpu_affinity_set = cpu_affinity_set,
	.mfc_dar_get = mfc_dar_get,
	.mfc_dsisr_set = mfc_dsisr_set,
	.mfc_dsisr_get = mfc_dsisr_get,
	.mfc_sdr_setup = mfc_sdr_setup,
	.mfc_sr1_set = mfc_sr1_set,
	.mfc_sr1_get = mfc_sr1_get,
	.mfc_tclass_id_set = mfc_tclass_id_set,
	.mfc_tclass_id_get = mfc_tclass_id_get,
	.tlb_invalidate = tlb_invalidate,
	.resource_allocation_groupID_set = resource_allocation_groupID_set,
	.resource_allocation_groupID_get = resource_allocation_groupID_get,
	.resource_allocation_enable_set = resource_allocation_enable_set,
	.resource_allocation_enable_get = resource_allocation_enable_get,
};

void ps3_spu_set_platform(void)
{
	spu_priv1_ops = &spu_priv1_ps3_ops;
	spu_management_ops = &spu_management_ps3_ops;
}
OpenPOWER on IntegriCloud