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e450992d DM |
1 | /* ds.c: Domain Services driver for Logical Domains |
2 | * | |
3 | * Copyright (C) 2007 David S. Miller <davem@davemloft.net> | |
4 | */ | |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/types.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/string.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/delay.h> | |
b3e13fbe | 14 | #include <linux/mutex.h> |
4f0234f4 DM |
15 | #include <linux/workqueue.h> |
16 | #include <linux/cpu.h> | |
e450992d DM |
17 | |
18 | #include <asm/ldc.h> | |
19 | #include <asm/vio.h> | |
20 | #include <asm/power.h> | |
43fdf274 | 21 | #include <asm/mdesc.h> |
4f0234f4 | 22 | #include <asm/head.h> |
e450992d DM |
23 | |
24 | #define DRV_MODULE_NAME "ds" | |
25 | #define PFX DRV_MODULE_NAME ": " | |
26 | #define DRV_MODULE_VERSION "1.0" | |
27 | #define DRV_MODULE_RELDATE "Jul 11, 2007" | |
28 | ||
29 | static char version[] __devinitdata = | |
30 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; | |
31 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
32 | MODULE_DESCRIPTION("Sun LDOM domain services driver"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | MODULE_VERSION(DRV_MODULE_VERSION); | |
35 | ||
36 | struct ds_msg_tag { | |
37 | __u32 type; | |
38 | #define DS_INIT_REQ 0x00 | |
39 | #define DS_INIT_ACK 0x01 | |
40 | #define DS_INIT_NACK 0x02 | |
41 | #define DS_REG_REQ 0x03 | |
42 | #define DS_REG_ACK 0x04 | |
43 | #define DS_REG_NACK 0x05 | |
44 | #define DS_UNREG_REQ 0x06 | |
45 | #define DS_UNREG_ACK 0x07 | |
46 | #define DS_UNREG_NACK 0x08 | |
47 | #define DS_DATA 0x09 | |
48 | #define DS_NACK 0x0a | |
49 | ||
50 | __u32 len; | |
51 | }; | |
52 | ||
53 | /* Result codes */ | |
54 | #define DS_OK 0x00 | |
55 | #define DS_REG_VER_NACK 0x01 | |
56 | #define DS_REG_DUP 0x02 | |
57 | #define DS_INV_HDL 0x03 | |
58 | #define DS_TYPE_UNKNOWN 0x04 | |
59 | ||
60 | struct ds_version { | |
61 | __u16 major; | |
62 | __u16 minor; | |
63 | }; | |
64 | ||
65 | struct ds_ver_req { | |
66 | struct ds_msg_tag tag; | |
67 | struct ds_version ver; | |
68 | }; | |
69 | ||
70 | struct ds_ver_ack { | |
71 | struct ds_msg_tag tag; | |
72 | __u16 minor; | |
73 | }; | |
74 | ||
75 | struct ds_ver_nack { | |
76 | struct ds_msg_tag tag; | |
77 | __u16 major; | |
78 | }; | |
79 | ||
80 | struct ds_reg_req { | |
81 | struct ds_msg_tag tag; | |
82 | __u64 handle; | |
83 | __u16 major; | |
84 | __u16 minor; | |
85 | char svc_id[0]; | |
86 | }; | |
87 | ||
88 | struct ds_reg_ack { | |
89 | struct ds_msg_tag tag; | |
90 | __u64 handle; | |
91 | __u16 minor; | |
92 | }; | |
93 | ||
94 | struct ds_reg_nack { | |
95 | struct ds_msg_tag tag; | |
96 | __u64 handle; | |
97 | __u16 major; | |
98 | }; | |
99 | ||
100 | struct ds_unreg_req { | |
101 | struct ds_msg_tag tag; | |
102 | __u64 handle; | |
103 | }; | |
104 | ||
105 | struct ds_unreg_ack { | |
106 | struct ds_msg_tag tag; | |
107 | __u64 handle; | |
108 | }; | |
109 | ||
110 | struct ds_unreg_nack { | |
111 | struct ds_msg_tag tag; | |
112 | __u64 handle; | |
113 | }; | |
114 | ||
115 | struct ds_data { | |
116 | struct ds_msg_tag tag; | |
117 | __u64 handle; | |
118 | }; | |
119 | ||
120 | struct ds_data_nack { | |
121 | struct ds_msg_tag tag; | |
122 | __u64 handle; | |
123 | __u64 result; | |
124 | }; | |
125 | ||
126 | struct ds_cap_state { | |
127 | __u64 handle; | |
128 | ||
129 | void (*data)(struct ldc_channel *lp, | |
4f0234f4 | 130 | struct ds_cap_state *cp, |
e450992d DM |
131 | void *buf, int len); |
132 | ||
133 | const char *service_id; | |
134 | ||
135 | u8 state; | |
136 | #define CAP_STATE_UNKNOWN 0x00 | |
137 | #define CAP_STATE_REG_SENT 0x01 | |
138 | #define CAP_STATE_REGISTERED 0x02 | |
139 | }; | |
140 | ||
4f0234f4 DM |
141 | static void md_update_data(struct ldc_channel *lp, struct ds_cap_state *cp, |
142 | void *buf, int len); | |
143 | static void domain_shutdown_data(struct ldc_channel *lp, | |
144 | struct ds_cap_state *cp, | |
145 | void *buf, int len); | |
146 | static void domain_panic_data(struct ldc_channel *lp, | |
147 | struct ds_cap_state *cp, | |
148 | void *buf, int len); | |
b14f5c10 | 149 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 DM |
150 | static void dr_cpu_data(struct ldc_channel *lp, |
151 | struct ds_cap_state *cp, | |
152 | void *buf, int len); | |
b14f5c10 | 153 | #endif |
4f0234f4 DM |
154 | static void ds_pri_data(struct ldc_channel *lp, |
155 | struct ds_cap_state *cp, | |
156 | void *buf, int len); | |
157 | static void ds_var_data(struct ldc_channel *lp, | |
158 | struct ds_cap_state *cp, | |
159 | void *buf, int len); | |
160 | ||
161 | struct ds_cap_state ds_states[] = { | |
162 | { | |
163 | .service_id = "md-update", | |
164 | .data = md_update_data, | |
165 | }, | |
166 | { | |
167 | .service_id = "domain-shutdown", | |
168 | .data = domain_shutdown_data, | |
169 | }, | |
170 | { | |
171 | .service_id = "domain-panic", | |
172 | .data = domain_panic_data, | |
173 | }, | |
b14f5c10 | 174 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 DM |
175 | { |
176 | .service_id = "dr-cpu", | |
177 | .data = dr_cpu_data, | |
178 | }, | |
b14f5c10 | 179 | #endif |
4f0234f4 DM |
180 | { |
181 | .service_id = "pri", | |
182 | .data = ds_pri_data, | |
183 | }, | |
184 | { | |
185 | .service_id = "var-config", | |
186 | .data = ds_var_data, | |
187 | }, | |
188 | { | |
189 | .service_id = "var-config-backup", | |
190 | .data = ds_var_data, | |
191 | }, | |
192 | }; | |
193 | ||
194 | static DEFINE_SPINLOCK(ds_lock); | |
195 | ||
196 | struct ds_info { | |
197 | struct ldc_channel *lp; | |
198 | u8 hs_state; | |
199 | #define DS_HS_START 0x01 | |
200 | #define DS_HS_DONE 0x02 | |
201 | ||
202 | void *rcv_buf; | |
203 | int rcv_buf_len; | |
204 | }; | |
205 | ||
206 | static struct ds_info *ds_info; | |
207 | ||
208 | static struct ds_cap_state *find_cap(u64 handle) | |
209 | { | |
210 | unsigned int index = handle >> 32; | |
211 | ||
212 | if (index >= ARRAY_SIZE(ds_states)) | |
213 | return NULL; | |
214 | return &ds_states[index]; | |
215 | } | |
216 | ||
217 | static struct ds_cap_state *find_cap_by_string(const char *name) | |
218 | { | |
219 | int i; | |
220 | ||
221 | for (i = 0; i < ARRAY_SIZE(ds_states); i++) { | |
222 | if (strcmp(ds_states[i].service_id, name)) | |
223 | continue; | |
224 | ||
225 | return &ds_states[i]; | |
226 | } | |
227 | return NULL; | |
228 | } | |
229 | ||
e450992d DM |
230 | static int ds_send(struct ldc_channel *lp, void *data, int len) |
231 | { | |
232 | int err, limit = 1000; | |
233 | ||
234 | err = -EINVAL; | |
235 | while (limit-- > 0) { | |
236 | err = ldc_write(lp, data, len); | |
237 | if (!err || (err != -EAGAIN)) | |
238 | break; | |
239 | udelay(1); | |
240 | } | |
241 | ||
242 | return err; | |
243 | } | |
244 | ||
245 | struct ds_md_update_req { | |
246 | __u64 req_num; | |
247 | }; | |
248 | ||
249 | struct ds_md_update_res { | |
250 | __u64 req_num; | |
251 | __u32 result; | |
252 | }; | |
253 | ||
254 | static void md_update_data(struct ldc_channel *lp, | |
255 | struct ds_cap_state *dp, | |
256 | void *buf, int len) | |
257 | { | |
258 | struct ds_data *dpkt = buf; | |
259 | struct ds_md_update_req *rp; | |
260 | struct { | |
261 | struct ds_data data; | |
262 | struct ds_md_update_res res; | |
263 | } pkt; | |
264 | ||
265 | rp = (struct ds_md_update_req *) (dpkt + 1); | |
266 | ||
b3e13fbe | 267 | printk(KERN_INFO PFX "Machine description update.\n"); |
e450992d DM |
268 | |
269 | memset(&pkt, 0, sizeof(pkt)); | |
270 | pkt.data.tag.type = DS_DATA; | |
271 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
272 | pkt.data.handle = dp->handle; | |
273 | pkt.res.req_num = rp->req_num; | |
274 | pkt.res.result = DS_OK; | |
275 | ||
276 | ds_send(lp, &pkt, sizeof(pkt)); | |
43fdf274 DM |
277 | |
278 | mdesc_update(); | |
e450992d DM |
279 | } |
280 | ||
281 | struct ds_shutdown_req { | |
282 | __u64 req_num; | |
283 | __u32 ms_delay; | |
284 | }; | |
285 | ||
286 | struct ds_shutdown_res { | |
287 | __u64 req_num; | |
288 | __u32 result; | |
289 | char reason[1]; | |
290 | }; | |
291 | ||
292 | static void domain_shutdown_data(struct ldc_channel *lp, | |
293 | struct ds_cap_state *dp, | |
294 | void *buf, int len) | |
295 | { | |
296 | struct ds_data *dpkt = buf; | |
297 | struct ds_shutdown_req *rp; | |
298 | struct { | |
299 | struct ds_data data; | |
300 | struct ds_shutdown_res res; | |
301 | } pkt; | |
302 | ||
303 | rp = (struct ds_shutdown_req *) (dpkt + 1); | |
304 | ||
305 | printk(KERN_ALERT PFX "Shutdown request from " | |
306 | "LDOM manager received.\n"); | |
307 | ||
308 | memset(&pkt, 0, sizeof(pkt)); | |
309 | pkt.data.tag.type = DS_DATA; | |
310 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
311 | pkt.data.handle = dp->handle; | |
312 | pkt.res.req_num = rp->req_num; | |
313 | pkt.res.result = DS_OK; | |
314 | pkt.res.reason[0] = 0; | |
315 | ||
316 | ds_send(lp, &pkt, sizeof(pkt)); | |
317 | ||
318 | wake_up_powerd(); | |
319 | } | |
320 | ||
321 | struct ds_panic_req { | |
322 | __u64 req_num; | |
323 | }; | |
324 | ||
325 | struct ds_panic_res { | |
326 | __u64 req_num; | |
327 | __u32 result; | |
328 | char reason[1]; | |
329 | }; | |
330 | ||
331 | static void domain_panic_data(struct ldc_channel *lp, | |
332 | struct ds_cap_state *dp, | |
333 | void *buf, int len) | |
334 | { | |
335 | struct ds_data *dpkt = buf; | |
336 | struct ds_panic_req *rp; | |
337 | struct { | |
338 | struct ds_data data; | |
339 | struct ds_panic_res res; | |
340 | } pkt; | |
341 | ||
342 | rp = (struct ds_panic_req *) (dpkt + 1); | |
343 | ||
b3e13fbe DM |
344 | printk(KERN_ALERT PFX "Panic request from " |
345 | "LDOM manager received.\n"); | |
e450992d DM |
346 | |
347 | memset(&pkt, 0, sizeof(pkt)); | |
348 | pkt.data.tag.type = DS_DATA; | |
349 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
350 | pkt.data.handle = dp->handle; | |
351 | pkt.res.req_num = rp->req_num; | |
352 | pkt.res.result = DS_OK; | |
353 | pkt.res.reason[0] = 0; | |
354 | ||
355 | ds_send(lp, &pkt, sizeof(pkt)); | |
356 | ||
357 | panic("PANIC requested by LDOM manager."); | |
358 | } | |
359 | ||
b14f5c10 | 360 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 | 361 | struct dr_cpu_tag { |
e450992d DM |
362 | __u64 req_num; |
363 | __u32 type; | |
4f0234f4 DM |
364 | #define DR_CPU_CONFIGURE 0x43 |
365 | #define DR_CPU_UNCONFIGURE 0x55 | |
366 | #define DR_CPU_FORCE_UNCONFIGURE 0x46 | |
367 | #define DR_CPU_STATUS 0x53 | |
e450992d DM |
368 | |
369 | /* Responses */ | |
4f0234f4 DM |
370 | #define DR_CPU_OK 0x6f |
371 | #define DR_CPU_ERROR 0x65 | |
e450992d DM |
372 | |
373 | __u32 num_records; | |
374 | }; | |
375 | ||
4f0234f4 DM |
376 | struct dr_cpu_resp_entry { |
377 | __u32 cpu; | |
378 | __u32 result; | |
379 | #define DR_CPU_RES_OK 0x00 | |
380 | #define DR_CPU_RES_FAILURE 0x01 | |
381 | #define DR_CPU_RES_BLOCKED 0x02 | |
382 | #define DR_CPU_RES_CPU_NOT_RESPONDING 0x03 | |
383 | #define DR_CPU_RES_NOT_IN_MD 0x04 | |
384 | ||
385 | __u32 stat; | |
386 | #define DR_CPU_STAT_NOT_PRESENT 0x00 | |
387 | #define DR_CPU_STAT_UNCONFIGURED 0x01 | |
388 | #define DR_CPU_STAT_CONFIGURED 0x02 | |
389 | ||
390 | __u32 str_off; | |
e450992d DM |
391 | }; |
392 | ||
4f0234f4 DM |
393 | /* DR cpu requests get queued onto the work list by the |
394 | * dr_cpu_data() callback. The list is protected by | |
395 | * ds_lock, and processed by dr_cpu_process() in order. | |
396 | */ | |
397 | static LIST_HEAD(dr_cpu_work_list); | |
398 | ||
399 | struct dr_cpu_queue_entry { | |
400 | struct list_head list; | |
401 | char req[0]; | |
402 | }; | |
403 | ||
404 | static void __dr_cpu_send_error(struct ds_cap_state *cp, struct ds_data *data) | |
405 | { | |
406 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
407 | struct ds_info *dp = ds_info; | |
408 | struct { | |
409 | struct ds_data data; | |
410 | struct dr_cpu_tag tag; | |
411 | } pkt; | |
412 | int msg_len; | |
413 | ||
414 | memset(&pkt, 0, sizeof(pkt)); | |
415 | pkt.data.tag.type = DS_DATA; | |
416 | pkt.data.handle = cp->handle; | |
417 | pkt.tag.req_num = tag->req_num; | |
418 | pkt.tag.type = DR_CPU_ERROR; | |
419 | pkt.tag.num_records = 0; | |
420 | ||
421 | msg_len = (sizeof(struct ds_data) + | |
422 | sizeof(struct dr_cpu_tag)); | |
423 | ||
424 | pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
425 | ||
426 | ds_send(dp->lp, &pkt, msg_len); | |
427 | } | |
428 | ||
429 | static void dr_cpu_send_error(struct ds_cap_state *cp, struct ds_data *data) | |
430 | { | |
431 | unsigned long flags; | |
432 | ||
433 | spin_lock_irqsave(&ds_lock, flags); | |
434 | __dr_cpu_send_error(cp, data); | |
435 | spin_unlock_irqrestore(&ds_lock, flags); | |
436 | } | |
437 | ||
438 | #define CPU_SENTINEL 0xffffffff | |
439 | ||
440 | static void purge_dups(u32 *list, u32 num_ents) | |
441 | { | |
442 | unsigned int i; | |
443 | ||
444 | for (i = 0; i < num_ents; i++) { | |
445 | u32 cpu = list[i]; | |
446 | unsigned int j; | |
447 | ||
448 | if (cpu == CPU_SENTINEL) | |
449 | continue; | |
450 | ||
451 | for (j = i + 1; j < num_ents; j++) { | |
452 | if (list[j] == cpu) | |
453 | list[j] = CPU_SENTINEL; | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
458 | static int dr_cpu_size_response(int ncpus) | |
459 | { | |
460 | return (sizeof(struct ds_data) + | |
461 | sizeof(struct dr_cpu_tag) + | |
462 | (sizeof(struct dr_cpu_resp_entry) * ncpus)); | |
463 | } | |
464 | ||
465 | static void dr_cpu_init_response(struct ds_data *resp, u64 req_num, | |
466 | u64 handle, int resp_len, int ncpus, | |
467 | cpumask_t *mask, u32 default_stat) | |
468 | { | |
469 | struct dr_cpu_resp_entry *ent; | |
470 | struct dr_cpu_tag *tag; | |
471 | int i, cpu; | |
472 | ||
473 | tag = (struct dr_cpu_tag *) (resp + 1); | |
474 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
475 | ||
476 | resp->tag.type = DS_DATA; | |
477 | resp->tag.len = resp_len - sizeof(struct ds_msg_tag); | |
478 | resp->handle = handle; | |
479 | tag->req_num = req_num; | |
480 | tag->type = DR_CPU_OK; | |
481 | tag->num_records = ncpus; | |
482 | ||
483 | i = 0; | |
484 | for_each_cpu_mask(cpu, *mask) { | |
485 | ent[i].cpu = cpu; | |
486 | ent[i].result = DR_CPU_RES_OK; | |
487 | ent[i].stat = default_stat; | |
488 | i++; | |
489 | } | |
490 | BUG_ON(i != ncpus); | |
491 | } | |
492 | ||
493 | static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus, | |
494 | u32 res, u32 stat) | |
495 | { | |
496 | struct dr_cpu_resp_entry *ent; | |
497 | struct dr_cpu_tag *tag; | |
498 | int i; | |
499 | ||
500 | tag = (struct dr_cpu_tag *) (resp + 1); | |
501 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
502 | ||
503 | for (i = 0; i < ncpus; i++) { | |
504 | if (ent[i].cpu != cpu) | |
505 | continue; | |
506 | ent[i].result = res; | |
507 | ent[i].stat = stat; | |
508 | break; | |
509 | } | |
510 | } | |
511 | ||
512 | static int dr_cpu_configure(struct ds_cap_state *cp, u64 req_num, | |
513 | cpumask_t *mask) | |
514 | { | |
515 | struct ds_data *resp; | |
516 | int resp_len, ncpus, cpu; | |
517 | unsigned long flags; | |
518 | ||
519 | ncpus = cpus_weight(*mask); | |
520 | resp_len = dr_cpu_size_response(ncpus); | |
521 | resp = kzalloc(resp_len, GFP_KERNEL); | |
522 | if (!resp) | |
523 | return -ENOMEM; | |
524 | ||
525 | dr_cpu_init_response(resp, req_num, cp->handle, | |
526 | resp_len, ncpus, mask, | |
527 | DR_CPU_STAT_CONFIGURED); | |
528 | ||
529 | mdesc_fill_in_cpu_data(*mask); | |
530 | ||
531 | for_each_cpu_mask(cpu, *mask) { | |
532 | int err; | |
533 | ||
534 | printk(KERN_INFO PFX "Starting cpu %d...\n", cpu); | |
535 | err = cpu_up(cpu); | |
536 | if (err) | |
537 | dr_cpu_mark(resp, cpu, ncpus, | |
538 | DR_CPU_RES_FAILURE, | |
539 | DR_CPU_STAT_UNCONFIGURED); | |
540 | } | |
541 | ||
542 | spin_lock_irqsave(&ds_lock, flags); | |
543 | ds_send(ds_info->lp, resp, resp_len); | |
544 | spin_unlock_irqrestore(&ds_lock, flags); | |
545 | ||
546 | kfree(resp); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | static int dr_cpu_unconfigure(struct ds_cap_state *cp, u64 req_num, | |
552 | cpumask_t *mask) | |
553 | { | |
554 | struct ds_data *resp; | |
555 | int resp_len, ncpus; | |
556 | ||
557 | ncpus = cpus_weight(*mask); | |
558 | resp_len = dr_cpu_size_response(ncpus); | |
559 | resp = kzalloc(resp_len, GFP_KERNEL); | |
560 | if (!resp) | |
561 | return -ENOMEM; | |
562 | ||
563 | dr_cpu_init_response(resp, req_num, cp->handle, | |
564 | resp_len, ncpus, mask, | |
565 | DR_CPU_STAT_UNCONFIGURED); | |
566 | ||
567 | kfree(resp); | |
568 | ||
569 | return -EOPNOTSUPP; | |
570 | } | |
571 | ||
572 | static void dr_cpu_process(struct work_struct *work) | |
573 | { | |
574 | struct dr_cpu_queue_entry *qp, *tmp; | |
575 | struct ds_cap_state *cp; | |
576 | unsigned long flags; | |
577 | LIST_HEAD(todo); | |
578 | cpumask_t mask; | |
579 | ||
580 | cp = find_cap_by_string("dr-cpu"); | |
581 | ||
582 | spin_lock_irqsave(&ds_lock, flags); | |
583 | list_splice(&dr_cpu_work_list, &todo); | |
584 | spin_unlock_irqrestore(&ds_lock, flags); | |
585 | ||
586 | list_for_each_entry_safe(qp, tmp, &todo, list) { | |
587 | struct ds_data *data = (struct ds_data *) qp->req; | |
588 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
589 | u32 *cpu_list = (u32 *) (tag + 1); | |
590 | u64 req_num = tag->req_num; | |
591 | unsigned int i; | |
592 | int err; | |
593 | ||
594 | switch (tag->type) { | |
595 | case DR_CPU_CONFIGURE: | |
596 | case DR_CPU_UNCONFIGURE: | |
597 | case DR_CPU_FORCE_UNCONFIGURE: | |
598 | break; | |
599 | ||
600 | default: | |
601 | dr_cpu_send_error(cp, data); | |
602 | goto next; | |
603 | } | |
604 | ||
605 | purge_dups(cpu_list, tag->num_records); | |
606 | ||
607 | cpus_clear(mask); | |
608 | for (i = 0; i < tag->num_records; i++) { | |
609 | if (cpu_list[i] == CPU_SENTINEL) | |
610 | continue; | |
611 | ||
612 | if (cpu_list[i] < NR_CPUS) | |
613 | cpu_set(cpu_list[i], mask); | |
614 | } | |
615 | ||
616 | if (tag->type == DR_CPU_CONFIGURE) | |
617 | err = dr_cpu_configure(cp, req_num, &mask); | |
618 | else | |
619 | err = dr_cpu_unconfigure(cp, req_num, &mask); | |
620 | ||
621 | if (err) | |
622 | dr_cpu_send_error(cp, data); | |
623 | ||
624 | next: | |
625 | list_del(&qp->list); | |
626 | kfree(qp); | |
627 | } | |
628 | } | |
629 | ||
630 | static DECLARE_WORK(dr_cpu_work, dr_cpu_process); | |
631 | ||
e450992d DM |
632 | static void dr_cpu_data(struct ldc_channel *lp, |
633 | struct ds_cap_state *dp, | |
634 | void *buf, int len) | |
635 | { | |
4f0234f4 | 636 | struct dr_cpu_queue_entry *qp; |
e450992d | 637 | struct ds_data *dpkt = buf; |
4f0234f4 | 638 | struct dr_cpu_tag *rp; |
e450992d | 639 | |
4f0234f4 | 640 | rp = (struct dr_cpu_tag *) (dpkt + 1); |
e450992d | 641 | |
4f0234f4 DM |
642 | qp = kmalloc(sizeof(struct dr_cpu_queue_entry) + len, GFP_ATOMIC); |
643 | if (!qp) { | |
644 | struct ds_cap_state *cp; | |
645 | ||
646 | cp = find_cap_by_string("dr-cpu"); | |
647 | __dr_cpu_send_error(cp, dpkt); | |
648 | } else { | |
649 | memcpy(&qp->req, buf, len); | |
650 | list_add_tail(&qp->list, &dr_cpu_work_list); | |
651 | schedule_work(&dr_cpu_work); | |
652 | } | |
e450992d | 653 | } |
b14f5c10 | 654 | #endif |
e450992d DM |
655 | |
656 | struct ds_pri_msg { | |
657 | __u64 req_num; | |
658 | __u64 type; | |
659 | #define DS_PRI_REQUEST 0x00 | |
660 | #define DS_PRI_DATA 0x01 | |
661 | #define DS_PRI_UPDATE 0x02 | |
662 | }; | |
663 | ||
664 | static void ds_pri_data(struct ldc_channel *lp, | |
665 | struct ds_cap_state *dp, | |
666 | void *buf, int len) | |
667 | { | |
668 | struct ds_data *dpkt = buf; | |
669 | struct ds_pri_msg *rp; | |
670 | ||
671 | rp = (struct ds_pri_msg *) (dpkt + 1); | |
672 | ||
b3e13fbe | 673 | printk(KERN_INFO PFX "PRI REQ [%lx:%lx], len=%d\n", |
e450992d DM |
674 | rp->req_num, rp->type, len); |
675 | } | |
676 | ||
b3e13fbe DM |
677 | struct ds_var_hdr { |
678 | __u32 type; | |
679 | #define DS_VAR_SET_REQ 0x00 | |
680 | #define DS_VAR_DELETE_REQ 0x01 | |
681 | #define DS_VAR_SET_RESP 0x02 | |
682 | #define DS_VAR_DELETE_RESP 0x03 | |
683 | }; | |
684 | ||
685 | struct ds_var_set_msg { | |
686 | struct ds_var_hdr hdr; | |
687 | char name_and_value[0]; | |
688 | }; | |
689 | ||
690 | struct ds_var_delete_msg { | |
691 | struct ds_var_hdr hdr; | |
692 | char name[0]; | |
693 | }; | |
694 | ||
695 | struct ds_var_resp { | |
696 | struct ds_var_hdr hdr; | |
697 | __u32 result; | |
698 | #define DS_VAR_SUCCESS 0x00 | |
699 | #define DS_VAR_NO_SPACE 0x01 | |
700 | #define DS_VAR_INVALID_VAR 0x02 | |
701 | #define DS_VAR_INVALID_VAL 0x03 | |
702 | #define DS_VAR_NOT_PRESENT 0x04 | |
703 | }; | |
704 | ||
705 | static DEFINE_MUTEX(ds_var_mutex); | |
706 | static int ds_var_doorbell; | |
707 | static int ds_var_response; | |
708 | ||
709 | static void ds_var_data(struct ldc_channel *lp, | |
710 | struct ds_cap_state *dp, | |
711 | void *buf, int len) | |
712 | { | |
713 | struct ds_data *dpkt = buf; | |
714 | struct ds_var_resp *rp; | |
715 | ||
716 | rp = (struct ds_var_resp *) (dpkt + 1); | |
717 | ||
718 | if (rp->hdr.type != DS_VAR_SET_RESP && | |
719 | rp->hdr.type != DS_VAR_DELETE_RESP) | |
720 | return; | |
721 | ||
722 | ds_var_response = rp->result; | |
723 | wmb(); | |
724 | ds_var_doorbell = 1; | |
725 | } | |
726 | ||
b3e13fbe DM |
727 | void ldom_set_var(const char *var, const char *value) |
728 | { | |
729 | struct ds_info *dp = ds_info; | |
730 | struct ds_cap_state *cp; | |
731 | ||
732 | cp = find_cap_by_string("var-config"); | |
733 | if (cp->state != CAP_STATE_REGISTERED) | |
734 | cp = find_cap_by_string("var-config-backup"); | |
735 | ||
736 | if (cp->state == CAP_STATE_REGISTERED) { | |
737 | union { | |
738 | struct { | |
739 | struct ds_data data; | |
740 | struct ds_var_set_msg msg; | |
741 | } header; | |
742 | char all[512]; | |
743 | } pkt; | |
744 | unsigned long flags; | |
745 | char *base, *p; | |
746 | int msg_len, loops; | |
747 | ||
748 | memset(&pkt, 0, sizeof(pkt)); | |
749 | pkt.header.data.tag.type = DS_DATA; | |
750 | pkt.header.data.handle = cp->handle; | |
751 | pkt.header.msg.hdr.type = DS_VAR_SET_REQ; | |
752 | base = p = &pkt.header.msg.name_and_value[0]; | |
753 | strcpy(p, var); | |
754 | p += strlen(var) + 1; | |
755 | strcpy(p, value); | |
756 | p += strlen(value) + 1; | |
757 | ||
758 | msg_len = (sizeof(struct ds_data) + | |
4f0234f4 DM |
759 | sizeof(struct ds_var_set_msg) + |
760 | (p - base)); | |
b3e13fbe DM |
761 | msg_len = (msg_len + 3) & ~3; |
762 | pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
763 | ||
764 | mutex_lock(&ds_var_mutex); | |
765 | ||
766 | spin_lock_irqsave(&ds_lock, flags); | |
767 | ds_var_doorbell = 0; | |
768 | ds_var_response = -1; | |
769 | ||
770 | ds_send(dp->lp, &pkt, msg_len); | |
771 | spin_unlock_irqrestore(&ds_lock, flags); | |
772 | ||
773 | loops = 1000; | |
774 | while (ds_var_doorbell == 0) { | |
775 | if (loops-- < 0) | |
776 | break; | |
777 | barrier(); | |
778 | udelay(100); | |
779 | } | |
780 | ||
781 | mutex_unlock(&ds_var_mutex); | |
782 | ||
783 | if (ds_var_doorbell == 0 || | |
784 | ds_var_response != DS_VAR_SUCCESS) | |
785 | printk(KERN_ERR PFX "var-config [%s:%s] " | |
786 | "failed, response(%d).\n", | |
787 | var, value, | |
788 | ds_var_response); | |
789 | } else { | |
790 | printk(KERN_ERR PFX "var-config not registered so " | |
791 | "could not set (%s) variable to (%s).\n", | |
792 | var, value); | |
793 | } | |
794 | } | |
795 | ||
796 | void ldom_reboot(const char *boot_command) | |
797 | { | |
798 | /* Don't bother with any of this if the boot_command | |
799 | * is empty. | |
800 | */ | |
801 | if (boot_command && strlen(boot_command)) { | |
802 | char full_boot_str[256]; | |
803 | ||
804 | strcpy(full_boot_str, "boot "); | |
805 | strcpy(full_boot_str + strlen("boot "), boot_command); | |
806 | ||
807 | ldom_set_var("reboot-command", full_boot_str); | |
808 | } | |
809 | sun4v_mach_sir(); | |
810 | } | |
811 | ||
4f0234f4 DM |
812 | void ldom_power_off(void) |
813 | { | |
814 | sun4v_mach_exit(0); | |
815 | } | |
816 | ||
e450992d DM |
817 | static void ds_conn_reset(struct ds_info *dp) |
818 | { | |
819 | printk(KERN_ERR PFX "ds_conn_reset() from %p\n", | |
820 | __builtin_return_address(0)); | |
821 | } | |
822 | ||
823 | static int register_services(struct ds_info *dp) | |
824 | { | |
825 | struct ldc_channel *lp = dp->lp; | |
826 | int i; | |
827 | ||
828 | for (i = 0; i < ARRAY_SIZE(ds_states); i++) { | |
829 | struct { | |
830 | struct ds_reg_req req; | |
831 | u8 id_buf[256]; | |
832 | } pbuf; | |
833 | struct ds_cap_state *cp = &ds_states[i]; | |
834 | int err, msg_len; | |
835 | u64 new_count; | |
836 | ||
837 | if (cp->state == CAP_STATE_REGISTERED) | |
838 | continue; | |
839 | ||
840 | new_count = sched_clock() & 0xffffffff; | |
841 | cp->handle = ((u64) i << 32) | new_count; | |
842 | ||
843 | msg_len = (sizeof(struct ds_reg_req) + | |
844 | strlen(cp->service_id)); | |
845 | ||
846 | memset(&pbuf, 0, sizeof(pbuf)); | |
847 | pbuf.req.tag.type = DS_REG_REQ; | |
848 | pbuf.req.tag.len = (msg_len - sizeof(struct ds_msg_tag)); | |
849 | pbuf.req.handle = cp->handle; | |
850 | pbuf.req.major = 1; | |
851 | pbuf.req.minor = 0; | |
852 | strcpy(pbuf.req.svc_id, cp->service_id); | |
853 | ||
854 | err = ds_send(lp, &pbuf, msg_len); | |
855 | if (err > 0) | |
856 | cp->state = CAP_STATE_REG_SENT; | |
857 | } | |
858 | return 0; | |
859 | } | |
860 | ||
861 | static int ds_handshake(struct ds_info *dp, struct ds_msg_tag *pkt) | |
862 | { | |
863 | ||
864 | if (dp->hs_state == DS_HS_START) { | |
865 | if (pkt->type != DS_INIT_ACK) | |
866 | goto conn_reset; | |
867 | ||
868 | dp->hs_state = DS_HS_DONE; | |
869 | ||
870 | return register_services(dp); | |
871 | } | |
872 | ||
873 | if (dp->hs_state != DS_HS_DONE) | |
874 | goto conn_reset; | |
875 | ||
876 | if (pkt->type == DS_REG_ACK) { | |
877 | struct ds_reg_ack *ap = (struct ds_reg_ack *) pkt; | |
878 | struct ds_cap_state *cp = find_cap(ap->handle); | |
879 | ||
880 | if (!cp) { | |
881 | printk(KERN_ERR PFX "REG ACK for unknown handle %lx\n", | |
882 | ap->handle); | |
883 | return 0; | |
884 | } | |
885 | printk(KERN_INFO PFX "Registered %s service.\n", | |
886 | cp->service_id); | |
887 | cp->state = CAP_STATE_REGISTERED; | |
888 | } else if (pkt->type == DS_REG_NACK) { | |
889 | struct ds_reg_nack *np = (struct ds_reg_nack *) pkt; | |
890 | struct ds_cap_state *cp = find_cap(np->handle); | |
891 | ||
892 | if (!cp) { | |
893 | printk(KERN_ERR PFX "REG NACK for " | |
894 | "unknown handle %lx\n", | |
895 | np->handle); | |
896 | return 0; | |
897 | } | |
4f0234f4 | 898 | printk(KERN_INFO PFX "Could not register %s service\n", |
e450992d DM |
899 | cp->service_id); |
900 | cp->state = CAP_STATE_UNKNOWN; | |
901 | } | |
902 | ||
903 | return 0; | |
904 | ||
905 | conn_reset: | |
906 | ds_conn_reset(dp); | |
907 | return -ECONNRESET; | |
908 | } | |
909 | ||
910 | static int ds_data(struct ds_info *dp, struct ds_msg_tag *pkt, int len) | |
911 | { | |
912 | struct ds_data *dpkt = (struct ds_data *) pkt; | |
913 | struct ds_cap_state *cp = find_cap(dpkt->handle); | |
914 | ||
915 | if (!cp) { | |
916 | struct ds_data_nack nack = { | |
917 | .tag = { | |
918 | .type = DS_NACK, | |
919 | .len = (sizeof(struct ds_data_nack) - | |
920 | sizeof(struct ds_msg_tag)), | |
921 | }, | |
922 | .handle = dpkt->handle, | |
923 | .result = DS_INV_HDL, | |
924 | }; | |
925 | ||
926 | printk(KERN_ERR PFX "Data for unknown handle %lu\n", | |
927 | dpkt->handle); | |
928 | ds_send(dp->lp, &nack, sizeof(nack)); | |
929 | } else { | |
930 | cp->data(dp->lp, cp, dpkt, len); | |
931 | } | |
932 | return 0; | |
933 | } | |
934 | ||
935 | static void ds_up(struct ds_info *dp) | |
936 | { | |
937 | struct ldc_channel *lp = dp->lp; | |
938 | struct ds_ver_req req; | |
939 | int err; | |
940 | ||
941 | req.tag.type = DS_INIT_REQ; | |
942 | req.tag.len = sizeof(req) - sizeof(struct ds_msg_tag); | |
943 | req.ver.major = 1; | |
944 | req.ver.minor = 0; | |
945 | ||
946 | err = ds_send(lp, &req, sizeof(req)); | |
947 | if (err > 0) | |
948 | dp->hs_state = DS_HS_START; | |
949 | } | |
950 | ||
951 | static void ds_event(void *arg, int event) | |
952 | { | |
953 | struct ds_info *dp = arg; | |
954 | struct ldc_channel *lp = dp->lp; | |
955 | unsigned long flags; | |
956 | int err; | |
957 | ||
958 | spin_lock_irqsave(&ds_lock, flags); | |
959 | ||
960 | if (event == LDC_EVENT_UP) { | |
961 | ds_up(dp); | |
962 | spin_unlock_irqrestore(&ds_lock, flags); | |
963 | return; | |
964 | } | |
965 | ||
966 | if (event != LDC_EVENT_DATA_READY) { | |
967 | printk(KERN_WARNING PFX "Unexpected LDC event %d\n", event); | |
968 | spin_unlock_irqrestore(&ds_lock, flags); | |
969 | return; | |
970 | } | |
971 | ||
972 | err = 0; | |
973 | while (1) { | |
974 | struct ds_msg_tag *tag; | |
975 | ||
976 | err = ldc_read(lp, dp->rcv_buf, sizeof(*tag)); | |
977 | ||
978 | if (unlikely(err < 0)) { | |
979 | if (err == -ECONNRESET) | |
980 | ds_conn_reset(dp); | |
981 | break; | |
982 | } | |
983 | if (err == 0) | |
984 | break; | |
985 | ||
986 | tag = dp->rcv_buf; | |
987 | err = ldc_read(lp, tag + 1, tag->len); | |
988 | ||
989 | if (unlikely(err < 0)) { | |
990 | if (err == -ECONNRESET) | |
991 | ds_conn_reset(dp); | |
992 | break; | |
993 | } | |
994 | if (err < tag->len) | |
995 | break; | |
996 | ||
997 | if (tag->type < DS_DATA) | |
998 | err = ds_handshake(dp, dp->rcv_buf); | |
999 | else | |
1000 | err = ds_data(dp, dp->rcv_buf, | |
1001 | sizeof(*tag) + err); | |
1002 | if (err == -ECONNRESET) | |
1003 | break; | |
1004 | } | |
1005 | ||
1006 | spin_unlock_irqrestore(&ds_lock, flags); | |
1007 | } | |
1008 | ||
1009 | static int __devinit ds_probe(struct vio_dev *vdev, | |
1010 | const struct vio_device_id *id) | |
1011 | { | |
1012 | static int ds_version_printed; | |
e450992d DM |
1013 | struct ldc_channel_config ds_cfg = { |
1014 | .event = ds_event, | |
1015 | .mtu = 4096, | |
1016 | .mode = LDC_MODE_STREAM, | |
1017 | }; | |
1018 | struct ldc_channel *lp; | |
1019 | struct ds_info *dp; | |
e450992d DM |
1020 | int err; |
1021 | ||
1022 | if (ds_version_printed++ == 0) | |
1023 | printk(KERN_INFO "%s", version); | |
1024 | ||
e450992d DM |
1025 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
1026 | err = -ENOMEM; | |
1027 | if (!dp) | |
1028 | goto out_err; | |
1029 | ||
1030 | dp->rcv_buf = kzalloc(4096, GFP_KERNEL); | |
1031 | if (!dp->rcv_buf) | |
1032 | goto out_free_dp; | |
1033 | ||
1034 | dp->rcv_buf_len = 4096; | |
1035 | ||
43fdf274 DM |
1036 | ds_cfg.tx_irq = vdev->tx_irq; |
1037 | ds_cfg.rx_irq = vdev->rx_irq; | |
e450992d | 1038 | |
43fdf274 | 1039 | lp = ldc_alloc(vdev->channel_id, &ds_cfg, dp); |
e450992d DM |
1040 | if (IS_ERR(lp)) { |
1041 | err = PTR_ERR(lp); | |
1042 | goto out_free_rcv_buf; | |
1043 | } | |
1044 | dp->lp = lp; | |
1045 | ||
133f09a1 | 1046 | err = ldc_bind(lp, "DS"); |
e450992d DM |
1047 | if (err) |
1048 | goto out_free_ldc; | |
1049 | ||
b3e13fbe DM |
1050 | ds_info = dp; |
1051 | ||
e450992d DM |
1052 | start_powerd(); |
1053 | ||
1054 | return err; | |
1055 | ||
1056 | out_free_ldc: | |
1057 | ldc_free(dp->lp); | |
1058 | ||
1059 | out_free_rcv_buf: | |
1060 | kfree(dp->rcv_buf); | |
1061 | ||
1062 | out_free_dp: | |
1063 | kfree(dp); | |
1064 | ||
1065 | out_err: | |
1066 | return err; | |
1067 | } | |
1068 | ||
1069 | static int ds_remove(struct vio_dev *vdev) | |
1070 | { | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static struct vio_device_id ds_match[] = { | |
1075 | { | |
1076 | .type = "domain-services-port", | |
1077 | }, | |
1078 | {}, | |
1079 | }; | |
1080 | ||
1081 | static struct vio_driver ds_driver = { | |
1082 | .id_table = ds_match, | |
1083 | .probe = ds_probe, | |
1084 | .remove = ds_remove, | |
1085 | .driver = { | |
1086 | .name = "ds", | |
1087 | .owner = THIS_MODULE, | |
1088 | } | |
1089 | }; | |
1090 | ||
1091 | static int __init ds_init(void) | |
1092 | { | |
1093 | int i; | |
1094 | ||
1095 | for (i = 0; i < ARRAY_SIZE(ds_states); i++) | |
1096 | ds_states[i].handle = ((u64)i << 32); | |
1097 | ||
1098 | return vio_register_driver(&ds_driver); | |
1099 | } | |
1100 | ||
1101 | subsys_initcall(ds_init); |