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22#include <linux/interrupt.h>
23#include <linux/list.h>
24#include <linux/export.h>
25#include <linux/ptrace.h>
26#include <linux/wait.h>
27#include <linux/mm.h>
28#include <linux/io.h>
29#include <linux/mutex.h>
30#include <linux/device.h>
31
32#include <asm/spu.h>
33#include <asm/spu_priv1.h>
34#include <asm/firmware.h>
35#include <asm/prom.h>
36
37#include "spufs/spufs.h"
38#include "interrupt.h"
39
40struct device_node *spu_devnode(struct spu *spu)
41{
42 return spu->devnode;
43}
44
45EXPORT_SYMBOL_GPL(spu_devnode);
46
47static u64 __init find_spu_unit_number(struct device_node *spe)
48{
49 const unsigned int *prop;
50 int proplen;
51
52
53 prop = of_get_property(spe, "physical-id", &proplen);
54 if (proplen == 4)
55 return (u64)*prop;
56
57
58 prop = of_get_property(spe, "unit-id", &proplen);
59 if (proplen == 4)
60 return (u64)*prop;
61
62
63 prop = of_get_property(spe, "reg", &proplen);
64 if (proplen == 4)
65 return (u64)*prop;
66
67 return 0;
68}
69
70static void spu_unmap(struct spu *spu)
71{
72 if (!firmware_has_feature(FW_FEATURE_LPAR))
73 iounmap(spu->priv1);
74 iounmap(spu->priv2);
75 iounmap(spu->problem);
76 iounmap((__force u8 __iomem *)spu->local_store);
77}
78
79static int __init spu_map_interrupts_old(struct spu *spu,
80 struct device_node *np)
81{
82 unsigned int isrc;
83 const u32 *tmp;
84 int nid;
85
86
87 tmp = of_get_property(np, "isrc", NULL);
88 if (!tmp)
89 return -ENODEV;
90 isrc = tmp[0];
91
92 tmp = of_get_property(np->parent->parent, "node-id", NULL);
93 if (!tmp) {
94 printk(KERN_WARNING "%s: can't find node-id\n", __func__);
95 nid = spu->node;
96 } else
97 nid = tmp[0];
98
99
100 isrc |= nid << IIC_IRQ_NODE_SHIFT;
101
102
103 spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
104 spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
105 spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
106
107
108 if (!spu->irqs[2])
109 return -EINVAL;
110
111 return 0;
112}
113
114static void __iomem * __init spu_map_prop_old(struct spu *spu,
115 struct device_node *n,
116 const char *name)
117{
118 const struct address_prop {
119 unsigned long address;
120 unsigned int len;
121 } __attribute__((packed)) *prop;
122 int proplen;
123
124 prop = of_get_property(n, name, &proplen);
125 if (prop == NULL || proplen != sizeof (struct address_prop))
126 return NULL;
127
128 return ioremap(prop->address, prop->len);
129}
130
131static int __init spu_map_device_old(struct spu *spu)
132{
133 struct device_node *node = spu->devnode;
134 const char *prop;
135 int ret;
136
137 ret = -ENODEV;
138 spu->name = of_get_property(node, "name", NULL);
139 if (!spu->name)
140 goto out;
141
142 prop = of_get_property(node, "local-store", NULL);
143 if (!prop)
144 goto out;
145 spu->local_store_phys = *(unsigned long *)prop;
146
147
148 spu->local_store = (void __force *)
149 spu_map_prop_old(spu, node, "local-store");
150 if (!spu->local_store)
151 goto out;
152
153 prop = of_get_property(node, "problem", NULL);
154 if (!prop)
155 goto out_unmap;
156 spu->problem_phys = *(unsigned long *)prop;
157
158 spu->problem = spu_map_prop_old(spu, node, "problem");
159 if (!spu->problem)
160 goto out_unmap;
161
162 spu->priv2 = spu_map_prop_old(spu, node, "priv2");
163 if (!spu->priv2)
164 goto out_unmap;
165
166 if (!firmware_has_feature(FW_FEATURE_LPAR)) {
167 spu->priv1 = spu_map_prop_old(spu, node, "priv1");
168 if (!spu->priv1)
169 goto out_unmap;
170 }
171
172 ret = 0;
173 goto out;
174
175out_unmap:
176 spu_unmap(spu);
177out:
178 return ret;
179}
180
181static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
182{
183 struct of_phandle_args oirq;
184 int ret;
185 int i;
186
187 for (i=0; i < 3; i++) {
188 ret = of_irq_parse_one(np, i, &oirq);
189 if (ret) {
190 pr_debug("spu_new: failed to get irq %d\n", i);
191 goto err;
192 }
193 ret = -EINVAL;
194 pr_debug(" irq %d no 0x%x on %pOF\n", i, oirq.args[0],
195 oirq.np);
196 spu->irqs[i] = irq_create_of_mapping(&oirq);
197 if (!spu->irqs[i]) {
198 pr_debug("spu_new: failed to map it !\n");
199 goto err;
200 }
201 }
202 return 0;
203
204err:
205 pr_debug("failed to map irq %x for spu %s\n", *oirq.args,
206 spu->name);
207 for (; i >= 0; i--) {
208 if (spu->irqs[i])
209 irq_dispose_mapping(spu->irqs[i]);
210 }
211 return ret;
212}
213
214static int spu_map_resource(struct spu *spu, int nr,
215 void __iomem** virt, unsigned long *phys)
216{
217 struct device_node *np = spu->devnode;
218 struct resource resource = { };
219 unsigned long len;
220 int ret;
221
222 ret = of_address_to_resource(np, nr, &resource);
223 if (ret)
224 return ret;
225 if (phys)
226 *phys = resource.start;
227 len = resource_size(&resource);
228 *virt = ioremap(resource.start, len);
229 if (!*virt)
230 return -EINVAL;
231 return 0;
232}
233
234static int __init spu_map_device(struct spu *spu)
235{
236 struct device_node *np = spu->devnode;
237 int ret = -ENODEV;
238
239 spu->name = of_get_property(np, "name", NULL);
240 if (!spu->name)
241 goto out;
242
243 ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
244 &spu->local_store_phys);
245 if (ret) {
246 pr_debug("spu_new: failed to map %pOF resource 0\n",
247 np);
248 goto out;
249 }
250 ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
251 &spu->problem_phys);
252 if (ret) {
253 pr_debug("spu_new: failed to map %pOF resource 1\n",
254 np);
255 goto out_unmap;
256 }
257 ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
258 if (ret) {
259 pr_debug("spu_new: failed to map %pOF resource 2\n",
260 np);
261 goto out_unmap;
262 }
263 if (!firmware_has_feature(FW_FEATURE_LPAR))
264 ret = spu_map_resource(spu, 3,
265 (void __iomem**)&spu->priv1, NULL);
266 if (ret) {
267 pr_debug("spu_new: failed to map %pOF resource 3\n",
268 np);
269 goto out_unmap;
270 }
271 pr_debug("spu_new: %pOF maps:\n", np);
272 pr_debug(" local store : 0x%016lx -> 0x%p\n",
273 spu->local_store_phys, spu->local_store);
274 pr_debug(" problem state : 0x%016lx -> 0x%p\n",
275 spu->problem_phys, spu->problem);
276 pr_debug(" priv2 : 0x%p\n", spu->priv2);
277 pr_debug(" priv1 : 0x%p\n", spu->priv1);
278
279 return 0;
280
281out_unmap:
282 spu_unmap(spu);
283out:
284 pr_debug("failed to map spe %s: %d\n", spu->name, ret);
285 return ret;
286}
287
288static int __init of_enumerate_spus(int (*fn)(void *data))
289{
290 int ret;
291 struct device_node *node;
292 unsigned int n = 0;
293
294 ret = -ENODEV;
295 for_each_node_by_type(node, "spe") {
296 ret = fn(node);
297 if (ret) {
298 printk(KERN_WARNING "%s: Error initializing %s\n",
299 __func__, node->name);
300 of_node_put(node);
301 break;
302 }
303 n++;
304 }
305 return ret ? ret : n;
306}
307
308static int __init of_create_spu(struct spu *spu, void *data)
309{
310 int ret;
311 struct device_node *spe = (struct device_node *)data;
312 static int legacy_map = 0, legacy_irq = 0;
313
314 spu->devnode = of_node_get(spe);
315 spu->spe_id = find_spu_unit_number(spe);
316
317 spu->node = of_node_to_nid(spe);
318 if (spu->node >= MAX_NUMNODES) {
319 printk(KERN_WARNING "SPE %pOF on node %d ignored,"
320 " node number too big\n", spe, spu->node);
321 printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
322 ret = -ENODEV;
323 goto out;
324 }
325
326 ret = spu_map_device(spu);
327 if (ret) {
328 if (!legacy_map) {
329 legacy_map = 1;
330 printk(KERN_WARNING "%s: Legacy device tree found, "
331 "trying to map old style\n", __func__);
332 }
333 ret = spu_map_device_old(spu);
334 if (ret) {
335 printk(KERN_ERR "Unable to map %s\n",
336 spu->name);
337 goto out;
338 }
339 }
340
341 ret = spu_map_interrupts(spu, spe);
342 if (ret) {
343 if (!legacy_irq) {
344 legacy_irq = 1;
345 printk(KERN_WARNING "%s: Legacy device tree found, "
346 "trying old style irq\n", __func__);
347 }
348 ret = spu_map_interrupts_old(spu, spe);
349 if (ret) {
350 printk(KERN_ERR "%s: could not map interrupts\n",
351 spu->name);
352 goto out_unmap;
353 }
354 }
355
356 pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
357 spu->local_store, spu->problem, spu->priv1,
358 spu->priv2, spu->number);
359 goto out;
360
361out_unmap:
362 spu_unmap(spu);
363out:
364 return ret;
365}
366
367static int of_destroy_spu(struct spu *spu)
368{
369 spu_unmap(spu);
370 of_node_put(spu->devnode);
371 return 0;
372}
373
374static void enable_spu_by_master_run(struct spu_context *ctx)
375{
376 ctx->ops->master_start(ctx);
377}
378
379static void disable_spu_by_master_run(struct spu_context *ctx)
380{
381 ctx->ops->master_stop(ctx);
382}
383
384
385#define QS20_SPES_PER_BE 8
386static int qs20_reg_idxs[QS20_SPES_PER_BE] = { 0, 2, 4, 6, 7, 5, 3, 1 };
387static int qs20_reg_memory[QS20_SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };
388
389static struct spu *spu_lookup_reg(int node, u32 reg)
390{
391 struct spu *spu;
392 const u32 *spu_reg;
393
394 list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
395 spu_reg = of_get_property(spu_devnode(spu), "reg", NULL);
396 if (*spu_reg == reg)
397 return spu;
398 }
399 return NULL;
400}
401
402static void init_affinity_qs20_harcoded(void)
403{
404 int node, i;
405 struct spu *last_spu, *spu;
406 u32 reg;
407
408 for (node = 0; node < MAX_NUMNODES; node++) {
409 last_spu = NULL;
410 for (i = 0; i < QS20_SPES_PER_BE; i++) {
411 reg = qs20_reg_idxs[i];
412 spu = spu_lookup_reg(node, reg);
413 if (!spu)
414 continue;
415 spu->has_mem_affinity = qs20_reg_memory[reg];
416 if (last_spu)
417 list_add_tail(&spu->aff_list,
418 &last_spu->aff_list);
419 last_spu = spu;
420 }
421 }
422}
423
424static int of_has_vicinity(void)
425{
426 struct device_node *dn;
427
428 for_each_node_by_type(dn, "spe") {
429 if (of_find_property(dn, "vicinity", NULL)) {
430 of_node_put(dn);
431 return 1;
432 }
433 }
434 return 0;
435}
436
437static struct spu *devnode_spu(int cbe, struct device_node *dn)
438{
439 struct spu *spu;
440
441 list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list)
442 if (spu_devnode(spu) == dn)
443 return spu;
444 return NULL;
445}
446
447static struct spu *
448neighbour_spu(int cbe, struct device_node *target, struct device_node *avoid)
449{
450 struct spu *spu;
451 struct device_node *spu_dn;
452 const phandle *vic_handles;
453 int lenp, i;
454
455 list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list) {
456 spu_dn = spu_devnode(spu);
457 if (spu_dn == avoid)
458 continue;
459 vic_handles = of_get_property(spu_dn, "vicinity", &lenp);
460 for (i=0; i < (lenp / sizeof(phandle)); i++) {
461 if (vic_handles[i] == target->phandle)
462 return spu;
463 }
464 }
465 return NULL;
466}
467
468static void init_affinity_node(int cbe)
469{
470 struct spu *spu, *last_spu;
471 struct device_node *vic_dn, *last_spu_dn;
472 phandle avoid_ph;
473 const phandle *vic_handles;
474 const char *name;
475 int lenp, i, added;
476
477 last_spu = list_first_entry(&cbe_spu_info[cbe].spus, struct spu,
478 cbe_list);
479 avoid_ph = 0;
480 for (added = 1; added < cbe_spu_info[cbe].n_spus; added++) {
481 last_spu_dn = spu_devnode(last_spu);
482 vic_handles = of_get_property(last_spu_dn, "vicinity", &lenp);
483
484
485
486
487
488 for (i = 0; i < (lenp / sizeof(phandle)); i++) {
489 if (vic_handles[i] == avoid_ph)
490 continue;
491
492 vic_dn = of_find_node_by_phandle(vic_handles[i]);
493 if (!vic_dn)
494 continue;
495
496
497 name = of_get_property(vic_dn, "name", NULL);
498 if (!name)
499 continue;
500
501 if (strcmp(name, "spe") == 0) {
502 spu = devnode_spu(cbe, vic_dn);
503 avoid_ph = last_spu_dn->phandle;
504 } else {
505
506
507
508
509
510
511 spu = neighbour_spu(cbe, vic_dn, last_spu_dn);
512 if (!spu)
513 continue;
514 if (!strcmp(name, "mic-tm")) {
515 last_spu->has_mem_affinity = 1;
516 spu->has_mem_affinity = 1;
517 }
518 avoid_ph = vic_dn->phandle;
519 }
520
521 list_add_tail(&spu->aff_list, &last_spu->aff_list);
522 last_spu = spu;
523 break;
524 }
525 }
526}
527
528static void init_affinity_fw(void)
529{
530 int cbe;
531
532 for (cbe = 0; cbe < MAX_NUMNODES; cbe++)
533 init_affinity_node(cbe);
534}
535
536static int __init init_affinity(void)
537{
538 if (of_has_vicinity()) {
539 init_affinity_fw();
540 } else {
541 if (of_machine_is_compatible("IBM,CPBW-1.0"))
542 init_affinity_qs20_harcoded();
543 else
544 printk("No affinity configuration found\n");
545 }
546
547 return 0;
548}
549
550const struct spu_management_ops spu_management_of_ops = {
551 .enumerate_spus = of_enumerate_spus,
552 .create_spu = of_create_spu,
553 .destroy_spu = of_destroy_spu,
554 .enable_spu = enable_spu_by_master_run,
555 .disable_spu = disable_spu_by_master_run,
556 .init_affinity = init_affinity,
557};
558
