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e450992d DM |
1 | /* ds.c: Domain Services driver for Logical Domains |
2 | * | |
3d452e55 | 3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
e450992d DM |
4 | */ |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/types.h> | |
e450992d DM |
9 | #include <linux/string.h> |
10 | #include <linux/slab.h> | |
11 | #include <linux/sched.h> | |
e6017571 | 12 | #include <linux/sched/clock.h> |
e450992d | 13 | #include <linux/delay.h> |
b3e13fbe | 14 | #include <linux/mutex.h> |
bd0e11ff | 15 | #include <linux/kthread.h> |
a3761780 | 16 | #include <linux/reboot.h> |
4f0234f4 | 17 | #include <linux/cpu.h> |
e450992d | 18 | |
ea5e7447 | 19 | #include <asm/hypervisor.h> |
e450992d DM |
20 | #include <asm/ldc.h> |
21 | #include <asm/vio.h> | |
43fdf274 | 22 | #include <asm/mdesc.h> |
4f0234f4 | 23 | #include <asm/head.h> |
e0204409 | 24 | #include <asm/irq.h> |
e450992d | 25 | |
ea5e7447 DM |
26 | #include "kernel.h" |
27 | ||
e450992d DM |
28 | #define DRV_MODULE_NAME "ds" |
29 | #define PFX DRV_MODULE_NAME ": " | |
30 | #define DRV_MODULE_VERSION "1.0" | |
31 | #define DRV_MODULE_RELDATE "Jul 11, 2007" | |
32 | ||
7c9503b8 | 33 | static char version[] = |
e450992d DM |
34 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
35 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
36 | MODULE_DESCRIPTION("Sun LDOM domain services driver"); | |
37 | MODULE_LICENSE("GPL"); | |
38 | MODULE_VERSION(DRV_MODULE_VERSION); | |
39 | ||
40 | struct ds_msg_tag { | |
41 | __u32 type; | |
42 | #define DS_INIT_REQ 0x00 | |
43 | #define DS_INIT_ACK 0x01 | |
44 | #define DS_INIT_NACK 0x02 | |
45 | #define DS_REG_REQ 0x03 | |
46 | #define DS_REG_ACK 0x04 | |
47 | #define DS_REG_NACK 0x05 | |
48 | #define DS_UNREG_REQ 0x06 | |
49 | #define DS_UNREG_ACK 0x07 | |
50 | #define DS_UNREG_NACK 0x08 | |
51 | #define DS_DATA 0x09 | |
52 | #define DS_NACK 0x0a | |
53 | ||
54 | __u32 len; | |
55 | }; | |
56 | ||
57 | /* Result codes */ | |
58 | #define DS_OK 0x00 | |
59 | #define DS_REG_VER_NACK 0x01 | |
60 | #define DS_REG_DUP 0x02 | |
61 | #define DS_INV_HDL 0x03 | |
62 | #define DS_TYPE_UNKNOWN 0x04 | |
63 | ||
64 | struct ds_version { | |
65 | __u16 major; | |
66 | __u16 minor; | |
67 | }; | |
68 | ||
69 | struct ds_ver_req { | |
70 | struct ds_msg_tag tag; | |
71 | struct ds_version ver; | |
72 | }; | |
73 | ||
74 | struct ds_ver_ack { | |
75 | struct ds_msg_tag tag; | |
76 | __u16 minor; | |
77 | }; | |
78 | ||
79 | struct ds_ver_nack { | |
80 | struct ds_msg_tag tag; | |
81 | __u16 major; | |
82 | }; | |
83 | ||
84 | struct ds_reg_req { | |
85 | struct ds_msg_tag tag; | |
86 | __u64 handle; | |
87 | __u16 major; | |
88 | __u16 minor; | |
89 | char svc_id[0]; | |
90 | }; | |
91 | ||
92 | struct ds_reg_ack { | |
93 | struct ds_msg_tag tag; | |
94 | __u64 handle; | |
95 | __u16 minor; | |
96 | }; | |
97 | ||
98 | struct ds_reg_nack { | |
99 | struct ds_msg_tag tag; | |
100 | __u64 handle; | |
101 | __u16 major; | |
102 | }; | |
103 | ||
104 | struct ds_unreg_req { | |
105 | struct ds_msg_tag tag; | |
106 | __u64 handle; | |
107 | }; | |
108 | ||
109 | struct ds_unreg_ack { | |
110 | struct ds_msg_tag tag; | |
111 | __u64 handle; | |
112 | }; | |
113 | ||
114 | struct ds_unreg_nack { | |
115 | struct ds_msg_tag tag; | |
116 | __u64 handle; | |
117 | }; | |
118 | ||
119 | struct ds_data { | |
120 | struct ds_msg_tag tag; | |
121 | __u64 handle; | |
122 | }; | |
123 | ||
124 | struct ds_data_nack { | |
125 | struct ds_msg_tag tag; | |
126 | __u64 handle; | |
127 | __u64 result; | |
128 | }; | |
129 | ||
5fc98610 | 130 | struct ds_info; |
e450992d DM |
131 | struct ds_cap_state { |
132 | __u64 handle; | |
133 | ||
5fc98610 | 134 | void (*data)(struct ds_info *dp, |
4f0234f4 | 135 | struct ds_cap_state *cp, |
e450992d DM |
136 | void *buf, int len); |
137 | ||
138 | const char *service_id; | |
139 | ||
140 | u8 state; | |
141 | #define CAP_STATE_UNKNOWN 0x00 | |
142 | #define CAP_STATE_REG_SENT 0x01 | |
143 | #define CAP_STATE_REGISTERED 0x02 | |
144 | }; | |
145 | ||
5fc98610 | 146 | static void md_update_data(struct ds_info *dp, struct ds_cap_state *cp, |
4f0234f4 | 147 | void *buf, int len); |
5fc98610 | 148 | static void domain_shutdown_data(struct ds_info *dp, |
4f0234f4 DM |
149 | struct ds_cap_state *cp, |
150 | void *buf, int len); | |
5fc98610 | 151 | static void domain_panic_data(struct ds_info *dp, |
4f0234f4 DM |
152 | struct ds_cap_state *cp, |
153 | void *buf, int len); | |
b14f5c10 | 154 | #ifdef CONFIG_HOTPLUG_CPU |
5fc98610 | 155 | static void dr_cpu_data(struct ds_info *dp, |
4f0234f4 DM |
156 | struct ds_cap_state *cp, |
157 | void *buf, int len); | |
b14f5c10 | 158 | #endif |
5fc98610 | 159 | static void ds_pri_data(struct ds_info *dp, |
4f0234f4 DM |
160 | struct ds_cap_state *cp, |
161 | void *buf, int len); | |
5fc98610 | 162 | static void ds_var_data(struct ds_info *dp, |
4f0234f4 DM |
163 | struct ds_cap_state *cp, |
164 | void *buf, int len); | |
165 | ||
908f5162 | 166 | static struct ds_cap_state ds_states_template[] = { |
4f0234f4 DM |
167 | { |
168 | .service_id = "md-update", | |
169 | .data = md_update_data, | |
170 | }, | |
171 | { | |
172 | .service_id = "domain-shutdown", | |
173 | .data = domain_shutdown_data, | |
174 | }, | |
175 | { | |
176 | .service_id = "domain-panic", | |
177 | .data = domain_panic_data, | |
178 | }, | |
b14f5c10 | 179 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 DM |
180 | { |
181 | .service_id = "dr-cpu", | |
182 | .data = dr_cpu_data, | |
183 | }, | |
b14f5c10 | 184 | #endif |
4f0234f4 DM |
185 | { |
186 | .service_id = "pri", | |
187 | .data = ds_pri_data, | |
188 | }, | |
189 | { | |
190 | .service_id = "var-config", | |
191 | .data = ds_var_data, | |
192 | }, | |
193 | { | |
194 | .service_id = "var-config-backup", | |
195 | .data = ds_var_data, | |
196 | }, | |
197 | }; | |
198 | ||
199 | static DEFINE_SPINLOCK(ds_lock); | |
200 | ||
201 | struct ds_info { | |
202 | struct ldc_channel *lp; | |
203 | u8 hs_state; | |
204 | #define DS_HS_START 0x01 | |
205 | #define DS_HS_DONE 0x02 | |
206 | ||
5fc98610 DM |
207 | u64 id; |
208 | ||
4f0234f4 DM |
209 | void *rcv_buf; |
210 | int rcv_buf_len; | |
5fc98610 DM |
211 | |
212 | struct ds_cap_state *ds_states; | |
213 | int num_ds_states; | |
214 | ||
215 | struct ds_info *next; | |
4f0234f4 DM |
216 | }; |
217 | ||
5fc98610 | 218 | static struct ds_info *ds_info_list; |
4f0234f4 | 219 | |
5fc98610 | 220 | static struct ds_cap_state *find_cap(struct ds_info *dp, u64 handle) |
4f0234f4 DM |
221 | { |
222 | unsigned int index = handle >> 32; | |
223 | ||
5fc98610 | 224 | if (index >= dp->num_ds_states) |
4f0234f4 | 225 | return NULL; |
5fc98610 | 226 | return &dp->ds_states[index]; |
4f0234f4 DM |
227 | } |
228 | ||
5fc98610 DM |
229 | static struct ds_cap_state *find_cap_by_string(struct ds_info *dp, |
230 | const char *name) | |
4f0234f4 DM |
231 | { |
232 | int i; | |
233 | ||
5fc98610 DM |
234 | for (i = 0; i < dp->num_ds_states; i++) { |
235 | if (strcmp(dp->ds_states[i].service_id, name)) | |
4f0234f4 DM |
236 | continue; |
237 | ||
5fc98610 | 238 | return &dp->ds_states[i]; |
4f0234f4 DM |
239 | } |
240 | return NULL; | |
241 | } | |
242 | ||
778feeb4 | 243 | static int __ds_send(struct ldc_channel *lp, void *data, int len) |
e450992d DM |
244 | { |
245 | int err, limit = 1000; | |
246 | ||
247 | err = -EINVAL; | |
248 | while (limit-- > 0) { | |
249 | err = ldc_write(lp, data, len); | |
250 | if (!err || (err != -EAGAIN)) | |
251 | break; | |
252 | udelay(1); | |
253 | } | |
254 | ||
255 | return err; | |
256 | } | |
257 | ||
778feeb4 DM |
258 | static int ds_send(struct ldc_channel *lp, void *data, int len) |
259 | { | |
260 | unsigned long flags; | |
261 | int err; | |
262 | ||
263 | spin_lock_irqsave(&ds_lock, flags); | |
264 | err = __ds_send(lp, data, len); | |
265 | spin_unlock_irqrestore(&ds_lock, flags); | |
266 | ||
267 | return err; | |
268 | } | |
269 | ||
e450992d DM |
270 | struct ds_md_update_req { |
271 | __u64 req_num; | |
272 | }; | |
273 | ||
274 | struct ds_md_update_res { | |
275 | __u64 req_num; | |
276 | __u32 result; | |
277 | }; | |
278 | ||
5fc98610 DM |
279 | static void md_update_data(struct ds_info *dp, |
280 | struct ds_cap_state *cp, | |
e450992d DM |
281 | void *buf, int len) |
282 | { | |
5fc98610 | 283 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
284 | struct ds_data *dpkt = buf; |
285 | struct ds_md_update_req *rp; | |
286 | struct { | |
287 | struct ds_data data; | |
288 | struct ds_md_update_res res; | |
289 | } pkt; | |
290 | ||
291 | rp = (struct ds_md_update_req *) (dpkt + 1); | |
292 | ||
90181136 | 293 | printk(KERN_INFO "ds-%llu: Machine description update.\n", dp->id); |
e450992d | 294 | |
778feeb4 DM |
295 | mdesc_update(); |
296 | ||
e450992d DM |
297 | memset(&pkt, 0, sizeof(pkt)); |
298 | pkt.data.tag.type = DS_DATA; | |
299 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 300 | pkt.data.handle = cp->handle; |
e450992d DM |
301 | pkt.res.req_num = rp->req_num; |
302 | pkt.res.result = DS_OK; | |
303 | ||
304 | ds_send(lp, &pkt, sizeof(pkt)); | |
305 | } | |
306 | ||
307 | struct ds_shutdown_req { | |
308 | __u64 req_num; | |
309 | __u32 ms_delay; | |
310 | }; | |
311 | ||
312 | struct ds_shutdown_res { | |
313 | __u64 req_num; | |
314 | __u32 result; | |
315 | char reason[1]; | |
316 | }; | |
317 | ||
5fc98610 DM |
318 | static void domain_shutdown_data(struct ds_info *dp, |
319 | struct ds_cap_state *cp, | |
e450992d DM |
320 | void *buf, int len) |
321 | { | |
5fc98610 | 322 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
323 | struct ds_data *dpkt = buf; |
324 | struct ds_shutdown_req *rp; | |
325 | struct { | |
326 | struct ds_data data; | |
327 | struct ds_shutdown_res res; | |
328 | } pkt; | |
329 | ||
330 | rp = (struct ds_shutdown_req *) (dpkt + 1); | |
331 | ||
90181136 | 332 | printk(KERN_ALERT "ds-%llu: Shutdown request from " |
5fc98610 | 333 | "LDOM manager received.\n", dp->id); |
e450992d DM |
334 | |
335 | memset(&pkt, 0, sizeof(pkt)); | |
336 | pkt.data.tag.type = DS_DATA; | |
337 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 338 | pkt.data.handle = cp->handle; |
e450992d DM |
339 | pkt.res.req_num = rp->req_num; |
340 | pkt.res.result = DS_OK; | |
341 | pkt.res.reason[0] = 0; | |
342 | ||
343 | ds_send(lp, &pkt, sizeof(pkt)); | |
344 | ||
a3761780 | 345 | orderly_poweroff(true); |
e450992d DM |
346 | } |
347 | ||
348 | struct ds_panic_req { | |
349 | __u64 req_num; | |
350 | }; | |
351 | ||
352 | struct ds_panic_res { | |
353 | __u64 req_num; | |
354 | __u32 result; | |
355 | char reason[1]; | |
356 | }; | |
357 | ||
5fc98610 DM |
358 | static void domain_panic_data(struct ds_info *dp, |
359 | struct ds_cap_state *cp, | |
e450992d DM |
360 | void *buf, int len) |
361 | { | |
5fc98610 | 362 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
363 | struct ds_data *dpkt = buf; |
364 | struct ds_panic_req *rp; | |
365 | struct { | |
366 | struct ds_data data; | |
367 | struct ds_panic_res res; | |
368 | } pkt; | |
369 | ||
370 | rp = (struct ds_panic_req *) (dpkt + 1); | |
371 | ||
90181136 | 372 | printk(KERN_ALERT "ds-%llu: Panic request from " |
5fc98610 | 373 | "LDOM manager received.\n", dp->id); |
e450992d DM |
374 | |
375 | memset(&pkt, 0, sizeof(pkt)); | |
376 | pkt.data.tag.type = DS_DATA; | |
377 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 378 | pkt.data.handle = cp->handle; |
e450992d DM |
379 | pkt.res.req_num = rp->req_num; |
380 | pkt.res.result = DS_OK; | |
381 | pkt.res.reason[0] = 0; | |
382 | ||
383 | ds_send(lp, &pkt, sizeof(pkt)); | |
384 | ||
385 | panic("PANIC requested by LDOM manager."); | |
386 | } | |
387 | ||
b14f5c10 | 388 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 | 389 | struct dr_cpu_tag { |
e450992d DM |
390 | __u64 req_num; |
391 | __u32 type; | |
4f0234f4 DM |
392 | #define DR_CPU_CONFIGURE 0x43 |
393 | #define DR_CPU_UNCONFIGURE 0x55 | |
394 | #define DR_CPU_FORCE_UNCONFIGURE 0x46 | |
395 | #define DR_CPU_STATUS 0x53 | |
e450992d DM |
396 | |
397 | /* Responses */ | |
4f0234f4 DM |
398 | #define DR_CPU_OK 0x6f |
399 | #define DR_CPU_ERROR 0x65 | |
e450992d DM |
400 | |
401 | __u32 num_records; | |
402 | }; | |
403 | ||
4f0234f4 DM |
404 | struct dr_cpu_resp_entry { |
405 | __u32 cpu; | |
406 | __u32 result; | |
407 | #define DR_CPU_RES_OK 0x00 | |
408 | #define DR_CPU_RES_FAILURE 0x01 | |
409 | #define DR_CPU_RES_BLOCKED 0x02 | |
410 | #define DR_CPU_RES_CPU_NOT_RESPONDING 0x03 | |
411 | #define DR_CPU_RES_NOT_IN_MD 0x04 | |
412 | ||
413 | __u32 stat; | |
414 | #define DR_CPU_STAT_NOT_PRESENT 0x00 | |
415 | #define DR_CPU_STAT_UNCONFIGURED 0x01 | |
416 | #define DR_CPU_STAT_CONFIGURED 0x02 | |
417 | ||
418 | __u32 str_off; | |
e450992d DM |
419 | }; |
420 | ||
5fc98610 DM |
421 | static void __dr_cpu_send_error(struct ds_info *dp, |
422 | struct ds_cap_state *cp, | |
423 | struct ds_data *data) | |
4f0234f4 DM |
424 | { |
425 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
4f0234f4 DM |
426 | struct { |
427 | struct ds_data data; | |
428 | struct dr_cpu_tag tag; | |
429 | } pkt; | |
430 | int msg_len; | |
431 | ||
432 | memset(&pkt, 0, sizeof(pkt)); | |
433 | pkt.data.tag.type = DS_DATA; | |
434 | pkt.data.handle = cp->handle; | |
435 | pkt.tag.req_num = tag->req_num; | |
436 | pkt.tag.type = DR_CPU_ERROR; | |
437 | pkt.tag.num_records = 0; | |
438 | ||
439 | msg_len = (sizeof(struct ds_data) + | |
440 | sizeof(struct dr_cpu_tag)); | |
441 | ||
442 | pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
443 | ||
778feeb4 | 444 | __ds_send(dp->lp, &pkt, msg_len); |
4f0234f4 DM |
445 | } |
446 | ||
5fc98610 DM |
447 | static void dr_cpu_send_error(struct ds_info *dp, |
448 | struct ds_cap_state *cp, | |
449 | struct ds_data *data) | |
4f0234f4 DM |
450 | { |
451 | unsigned long flags; | |
452 | ||
453 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 454 | __dr_cpu_send_error(dp, cp, data); |
4f0234f4 DM |
455 | spin_unlock_irqrestore(&ds_lock, flags); |
456 | } | |
457 | ||
458 | #define CPU_SENTINEL 0xffffffff | |
459 | ||
460 | static void purge_dups(u32 *list, u32 num_ents) | |
461 | { | |
462 | unsigned int i; | |
463 | ||
464 | for (i = 0; i < num_ents; i++) { | |
465 | u32 cpu = list[i]; | |
466 | unsigned int j; | |
467 | ||
468 | if (cpu == CPU_SENTINEL) | |
469 | continue; | |
470 | ||
471 | for (j = i + 1; j < num_ents; j++) { | |
472 | if (list[j] == cpu) | |
473 | list[j] = CPU_SENTINEL; | |
474 | } | |
475 | } | |
476 | } | |
477 | ||
478 | static int dr_cpu_size_response(int ncpus) | |
479 | { | |
480 | return (sizeof(struct ds_data) + | |
481 | sizeof(struct dr_cpu_tag) + | |
482 | (sizeof(struct dr_cpu_resp_entry) * ncpus)); | |
483 | } | |
484 | ||
485 | static void dr_cpu_init_response(struct ds_data *resp, u64 req_num, | |
486 | u64 handle, int resp_len, int ncpus, | |
487 | cpumask_t *mask, u32 default_stat) | |
488 | { | |
489 | struct dr_cpu_resp_entry *ent; | |
490 | struct dr_cpu_tag *tag; | |
491 | int i, cpu; | |
492 | ||
493 | tag = (struct dr_cpu_tag *) (resp + 1); | |
494 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
495 | ||
496 | resp->tag.type = DS_DATA; | |
497 | resp->tag.len = resp_len - sizeof(struct ds_msg_tag); | |
498 | resp->handle = handle; | |
499 | tag->req_num = req_num; | |
500 | tag->type = DR_CPU_OK; | |
501 | tag->num_records = ncpus; | |
502 | ||
503 | i = 0; | |
fb1fece5 | 504 | for_each_cpu(cpu, mask) { |
4f0234f4 DM |
505 | ent[i].cpu = cpu; |
506 | ent[i].result = DR_CPU_RES_OK; | |
507 | ent[i].stat = default_stat; | |
508 | i++; | |
509 | } | |
510 | BUG_ON(i != ncpus); | |
511 | } | |
512 | ||
513 | static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus, | |
514 | u32 res, u32 stat) | |
515 | { | |
516 | struct dr_cpu_resp_entry *ent; | |
517 | struct dr_cpu_tag *tag; | |
518 | int i; | |
519 | ||
520 | tag = (struct dr_cpu_tag *) (resp + 1); | |
521 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
522 | ||
523 | for (i = 0; i < ncpus; i++) { | |
524 | if (ent[i].cpu != cpu) | |
525 | continue; | |
526 | ent[i].result = res; | |
527 | ent[i].stat = stat; | |
528 | break; | |
529 | } | |
530 | } | |
531 | ||
2066aadd PG |
532 | static int dr_cpu_configure(struct ds_info *dp, struct ds_cap_state *cp, |
533 | u64 req_num, cpumask_t *mask) | |
4f0234f4 DM |
534 | { |
535 | struct ds_data *resp; | |
536 | int resp_len, ncpus, cpu; | |
537 | unsigned long flags; | |
538 | ||
fb1fece5 | 539 | ncpus = cpumask_weight(mask); |
4f0234f4 DM |
540 | resp_len = dr_cpu_size_response(ncpus); |
541 | resp = kzalloc(resp_len, GFP_KERNEL); | |
542 | if (!resp) | |
543 | return -ENOMEM; | |
544 | ||
545 | dr_cpu_init_response(resp, req_num, cp->handle, | |
546 | resp_len, ncpus, mask, | |
547 | DR_CPU_STAT_CONFIGURED); | |
548 | ||
b696fdc2 | 549 | mdesc_populate_present_mask(mask); |
a2094502 | 550 | mdesc_fill_in_cpu_data(mask); |
4f0234f4 | 551 | |
fb1fece5 | 552 | for_each_cpu(cpu, mask) { |
4f0234f4 DM |
553 | int err; |
554 | ||
90181136 | 555 | printk(KERN_INFO "ds-%llu: Starting cpu %d...\n", |
5fc98610 | 556 | dp->id, cpu); |
4f0234f4 | 557 | err = cpu_up(cpu); |
bd0e11ff | 558 | if (err) { |
9918cc2e DM |
559 | __u32 res = DR_CPU_RES_FAILURE; |
560 | __u32 stat = DR_CPU_STAT_UNCONFIGURED; | |
561 | ||
562 | if (!cpu_present(cpu)) { | |
563 | /* CPU not present in MD */ | |
564 | res = DR_CPU_RES_NOT_IN_MD; | |
565 | stat = DR_CPU_STAT_NOT_PRESENT; | |
566 | } else if (err == -ENODEV) { | |
567 | /* CPU did not call in successfully */ | |
568 | res = DR_CPU_RES_CPU_NOT_RESPONDING; | |
569 | } | |
570 | ||
90181136 | 571 | printk(KERN_INFO "ds-%llu: CPU startup failed err=%d\n", |
5fc98610 | 572 | dp->id, err); |
9918cc2e | 573 | dr_cpu_mark(resp, cpu, ncpus, res, stat); |
bd0e11ff | 574 | } |
4f0234f4 DM |
575 | } |
576 | ||
577 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 578 | __ds_send(dp->lp, resp, resp_len); |
4f0234f4 DM |
579 | spin_unlock_irqrestore(&ds_lock, flags); |
580 | ||
581 | kfree(resp); | |
582 | ||
e0204409 DM |
583 | /* Redistribute IRQs, taking into account the new cpus. */ |
584 | fixup_irqs(); | |
585 | ||
4f0234f4 DM |
586 | return 0; |
587 | } | |
588 | ||
5fc98610 DM |
589 | static int dr_cpu_unconfigure(struct ds_info *dp, |
590 | struct ds_cap_state *cp, | |
591 | u64 req_num, | |
4f0234f4 DM |
592 | cpumask_t *mask) |
593 | { | |
594 | struct ds_data *resp; | |
e0204409 DM |
595 | int resp_len, ncpus, cpu; |
596 | unsigned long flags; | |
4f0234f4 | 597 | |
fb1fece5 | 598 | ncpus = cpumask_weight(mask); |
4f0234f4 DM |
599 | resp_len = dr_cpu_size_response(ncpus); |
600 | resp = kzalloc(resp_len, GFP_KERNEL); | |
601 | if (!resp) | |
602 | return -ENOMEM; | |
603 | ||
604 | dr_cpu_init_response(resp, req_num, cp->handle, | |
605 | resp_len, ncpus, mask, | |
606 | DR_CPU_STAT_UNCONFIGURED); | |
607 | ||
fb1fece5 | 608 | for_each_cpu(cpu, mask) { |
e0204409 DM |
609 | int err; |
610 | ||
90181136 | 611 | printk(KERN_INFO "ds-%llu: Shutting down cpu %d...\n", |
5fc98610 | 612 | dp->id, cpu); |
e0204409 DM |
613 | err = cpu_down(cpu); |
614 | if (err) | |
615 | dr_cpu_mark(resp, cpu, ncpus, | |
616 | DR_CPU_RES_FAILURE, | |
617 | DR_CPU_STAT_CONFIGURED); | |
618 | } | |
619 | ||
620 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 621 | __ds_send(dp->lp, resp, resp_len); |
e0204409 DM |
622 | spin_unlock_irqrestore(&ds_lock, flags); |
623 | ||
4f0234f4 DM |
624 | kfree(resp); |
625 | ||
e0204409 | 626 | return 0; |
4f0234f4 DM |
627 | } |
628 | ||
2066aadd PG |
629 | static void dr_cpu_data(struct ds_info *dp, struct ds_cap_state *cp, void *buf, |
630 | int len) | |
4f0234f4 | 631 | { |
778feeb4 DM |
632 | struct ds_data *data = buf; |
633 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
634 | u32 *cpu_list = (u32 *) (tag + 1); | |
635 | u64 req_num = tag->req_num; | |
4f0234f4 | 636 | cpumask_t mask; |
778feeb4 DM |
637 | unsigned int i; |
638 | int err; | |
4f0234f4 | 639 | |
778feeb4 DM |
640 | switch (tag->type) { |
641 | case DR_CPU_CONFIGURE: | |
642 | case DR_CPU_UNCONFIGURE: | |
643 | case DR_CPU_FORCE_UNCONFIGURE: | |
644 | break; | |
4f0234f4 | 645 | |
778feeb4 | 646 | default: |
5fc98610 | 647 | dr_cpu_send_error(dp, cp, data); |
778feeb4 | 648 | return; |
4f0234f4 | 649 | } |
4f0234f4 | 650 | |
778feeb4 | 651 | purge_dups(cpu_list, tag->num_records); |
bd0e11ff | 652 | |
fb1fece5 | 653 | cpumask_clear(&mask); |
778feeb4 DM |
654 | for (i = 0; i < tag->num_records; i++) { |
655 | if (cpu_list[i] == CPU_SENTINEL) | |
656 | continue; | |
bd0e11ff | 657 | |
e305cb8f | 658 | if (cpu_list[i] < nr_cpu_ids) |
fb1fece5 | 659 | cpumask_set_cpu(cpu_list[i], &mask); |
bd0e11ff DM |
660 | } |
661 | ||
778feeb4 | 662 | if (tag->type == DR_CPU_CONFIGURE) |
5fc98610 | 663 | err = dr_cpu_configure(dp, cp, req_num, &mask); |
778feeb4 | 664 | else |
5fc98610 | 665 | err = dr_cpu_unconfigure(dp, cp, req_num, &mask); |
e450992d | 666 | |
778feeb4 | 667 | if (err) |
5fc98610 | 668 | dr_cpu_send_error(dp, cp, data); |
e450992d | 669 | } |
778feeb4 | 670 | #endif /* CONFIG_HOTPLUG_CPU */ |
e450992d DM |
671 | |
672 | struct ds_pri_msg { | |
673 | __u64 req_num; | |
674 | __u64 type; | |
675 | #define DS_PRI_REQUEST 0x00 | |
676 | #define DS_PRI_DATA 0x01 | |
677 | #define DS_PRI_UPDATE 0x02 | |
678 | }; | |
679 | ||
5fc98610 DM |
680 | static void ds_pri_data(struct ds_info *dp, |
681 | struct ds_cap_state *cp, | |
e450992d DM |
682 | void *buf, int len) |
683 | { | |
684 | struct ds_data *dpkt = buf; | |
685 | struct ds_pri_msg *rp; | |
686 | ||
687 | rp = (struct ds_pri_msg *) (dpkt + 1); | |
688 | ||
90181136 | 689 | printk(KERN_INFO "ds-%llu: PRI REQ [%llx:%llx], len=%d\n", |
5fc98610 | 690 | dp->id, rp->req_num, rp->type, len); |
e450992d DM |
691 | } |
692 | ||
b3e13fbe DM |
693 | struct ds_var_hdr { |
694 | __u32 type; | |
695 | #define DS_VAR_SET_REQ 0x00 | |
696 | #define DS_VAR_DELETE_REQ 0x01 | |
697 | #define DS_VAR_SET_RESP 0x02 | |
698 | #define DS_VAR_DELETE_RESP 0x03 | |
699 | }; | |
700 | ||
701 | struct ds_var_set_msg { | |
702 | struct ds_var_hdr hdr; | |
703 | char name_and_value[0]; | |
704 | }; | |
705 | ||
706 | struct ds_var_delete_msg { | |
707 | struct ds_var_hdr hdr; | |
708 | char name[0]; | |
709 | }; | |
710 | ||
711 | struct ds_var_resp { | |
712 | struct ds_var_hdr hdr; | |
713 | __u32 result; | |
714 | #define DS_VAR_SUCCESS 0x00 | |
715 | #define DS_VAR_NO_SPACE 0x01 | |
716 | #define DS_VAR_INVALID_VAR 0x02 | |
717 | #define DS_VAR_INVALID_VAL 0x03 | |
718 | #define DS_VAR_NOT_PRESENT 0x04 | |
719 | }; | |
720 | ||
721 | static DEFINE_MUTEX(ds_var_mutex); | |
722 | static int ds_var_doorbell; | |
723 | static int ds_var_response; | |
724 | ||
5fc98610 DM |
725 | static void ds_var_data(struct ds_info *dp, |
726 | struct ds_cap_state *cp, | |
b3e13fbe DM |
727 | void *buf, int len) |
728 | { | |
729 | struct ds_data *dpkt = buf; | |
730 | struct ds_var_resp *rp; | |
731 | ||
732 | rp = (struct ds_var_resp *) (dpkt + 1); | |
733 | ||
734 | if (rp->hdr.type != DS_VAR_SET_RESP && | |
735 | rp->hdr.type != DS_VAR_DELETE_RESP) | |
736 | return; | |
737 | ||
738 | ds_var_response = rp->result; | |
739 | wmb(); | |
740 | ds_var_doorbell = 1; | |
741 | } | |
742 | ||
b3e13fbe DM |
743 | void ldom_set_var(const char *var, const char *value) |
744 | { | |
b3e13fbe | 745 | struct ds_cap_state *cp; |
5fc98610 DM |
746 | struct ds_info *dp; |
747 | unsigned long flags; | |
748 | ||
749 | spin_lock_irqsave(&ds_lock, flags); | |
750 | cp = NULL; | |
751 | for (dp = ds_info_list; dp; dp = dp->next) { | |
752 | struct ds_cap_state *tmp; | |
753 | ||
754 | tmp = find_cap_by_string(dp, "var-config"); | |
755 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
756 | cp = tmp; | |
757 | break; | |
758 | } | |
759 | } | |
760 | if (!cp) { | |
761 | for (dp = ds_info_list; dp; dp = dp->next) { | |
762 | struct ds_cap_state *tmp; | |
b3e13fbe | 763 | |
5fc98610 DM |
764 | tmp = find_cap_by_string(dp, "var-config-backup"); |
765 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
766 | cp = tmp; | |
767 | break; | |
768 | } | |
769 | } | |
770 | } | |
771 | spin_unlock_irqrestore(&ds_lock, flags); | |
b3e13fbe | 772 | |
5fc98610 | 773 | if (cp) { |
b3e13fbe DM |
774 | union { |
775 | struct { | |
776 | struct ds_data data; | |
777 | struct ds_var_set_msg msg; | |
778 | } header; | |
779 | char all[512]; | |
780 | } pkt; | |
b3e13fbe DM |
781 | char *base, *p; |
782 | int msg_len, loops; | |
783 | ||
f118e9ab CG |
784 | if (strlen(var) + strlen(value) + 2 > |
785 | sizeof(pkt) - sizeof(pkt.header)) { | |
786 | printk(KERN_ERR PFX | |
787 | "contents length: %zu, which more than max: %lu," | |
788 | "so could not set (%s) variable to (%s).\n", | |
789 | strlen(var) + strlen(value) + 2, | |
790 | sizeof(pkt) - sizeof(pkt.header), var, value); | |
791 | return; | |
792 | } | |
793 | ||
b3e13fbe DM |
794 | memset(&pkt, 0, sizeof(pkt)); |
795 | pkt.header.data.tag.type = DS_DATA; | |
796 | pkt.header.data.handle = cp->handle; | |
797 | pkt.header.msg.hdr.type = DS_VAR_SET_REQ; | |
798 | base = p = &pkt.header.msg.name_and_value[0]; | |
799 | strcpy(p, var); | |
800 | p += strlen(var) + 1; | |
801 | strcpy(p, value); | |
802 | p += strlen(value) + 1; | |
803 | ||
804 | msg_len = (sizeof(struct ds_data) + | |
4f0234f4 DM |
805 | sizeof(struct ds_var_set_msg) + |
806 | (p - base)); | |
b3e13fbe DM |
807 | msg_len = (msg_len + 3) & ~3; |
808 | pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
809 | ||
810 | mutex_lock(&ds_var_mutex); | |
811 | ||
812 | spin_lock_irqsave(&ds_lock, flags); | |
813 | ds_var_doorbell = 0; | |
814 | ds_var_response = -1; | |
815 | ||
778feeb4 | 816 | __ds_send(dp->lp, &pkt, msg_len); |
b3e13fbe DM |
817 | spin_unlock_irqrestore(&ds_lock, flags); |
818 | ||
819 | loops = 1000; | |
820 | while (ds_var_doorbell == 0) { | |
821 | if (loops-- < 0) | |
822 | break; | |
823 | barrier(); | |
824 | udelay(100); | |
825 | } | |
826 | ||
827 | mutex_unlock(&ds_var_mutex); | |
828 | ||
829 | if (ds_var_doorbell == 0 || | |
830 | ds_var_response != DS_VAR_SUCCESS) | |
90181136 | 831 | printk(KERN_ERR "ds-%llu: var-config [%s:%s] " |
b3e13fbe | 832 | "failed, response(%d).\n", |
5fc98610 | 833 | dp->id, var, value, |
b3e13fbe DM |
834 | ds_var_response); |
835 | } else { | |
836 | printk(KERN_ERR PFX "var-config not registered so " | |
837 | "could not set (%s) variable to (%s).\n", | |
838 | var, value); | |
839 | } | |
840 | } | |
841 | ||
ea5e7447 DM |
842 | static char full_boot_str[256] __attribute__((aligned(32))); |
843 | static int reboot_data_supported; | |
844 | ||
b3e13fbe DM |
845 | void ldom_reboot(const char *boot_command) |
846 | { | |
847 | /* Don't bother with any of this if the boot_command | |
848 | * is empty. | |
849 | */ | |
850 | if (boot_command && strlen(boot_command)) { | |
ea5e7447 | 851 | unsigned long len; |
b3e13fbe | 852 | |
20928bd3 KC |
853 | snprintf(full_boot_str, sizeof(full_boot_str), "boot %s", |
854 | boot_command); | |
ea5e7447 | 855 | len = strlen(full_boot_str); |
b3e13fbe | 856 | |
ea5e7447 DM |
857 | if (reboot_data_supported) { |
858 | unsigned long ra = kimage_addr_to_ra(full_boot_str); | |
859 | unsigned long hv_ret; | |
860 | ||
861 | hv_ret = sun4v_reboot_data_set(ra, len); | |
862 | if (hv_ret != HV_EOK) | |
863 | pr_err("SUN4V: Unable to set reboot data " | |
864 | "hv_ret=%lu\n", hv_ret); | |
865 | } else { | |
866 | ldom_set_var("reboot-command", full_boot_str); | |
867 | } | |
b3e13fbe DM |
868 | } |
869 | sun4v_mach_sir(); | |
870 | } | |
871 | ||
4f0234f4 DM |
872 | void ldom_power_off(void) |
873 | { | |
874 | sun4v_mach_exit(0); | |
875 | } | |
876 | ||
e450992d DM |
877 | static void ds_conn_reset(struct ds_info *dp) |
878 | { | |
e9b57cca | 879 | printk(KERN_ERR "ds-%llu: ds_conn_reset() from %pf\n", |
5fc98610 | 880 | dp->id, __builtin_return_address(0)); |
e450992d DM |
881 | } |
882 | ||
883 | static int register_services(struct ds_info *dp) | |
884 | { | |
885 | struct ldc_channel *lp = dp->lp; | |
886 | int i; | |
887 | ||
5fc98610 | 888 | for (i = 0; i < dp->num_ds_states; i++) { |
e450992d DM |
889 | struct { |
890 | struct ds_reg_req req; | |
891 | u8 id_buf[256]; | |
892 | } pbuf; | |
5fc98610 | 893 | struct ds_cap_state *cp = &dp->ds_states[i]; |
e450992d DM |
894 | int err, msg_len; |
895 | u64 new_count; | |
896 | ||
897 | if (cp->state == CAP_STATE_REGISTERED) | |
898 | continue; | |
899 | ||
900 | new_count = sched_clock() & 0xffffffff; | |
901 | cp->handle = ((u64) i << 32) | new_count; | |
902 | ||
903 | msg_len = (sizeof(struct ds_reg_req) + | |
904 | strlen(cp->service_id)); | |
905 | ||
906 | memset(&pbuf, 0, sizeof(pbuf)); | |
907 | pbuf.req.tag.type = DS_REG_REQ; | |
908 | pbuf.req.tag.len = (msg_len - sizeof(struct ds_msg_tag)); | |
909 | pbuf.req.handle = cp->handle; | |
910 | pbuf.req.major = 1; | |
911 | pbuf.req.minor = 0; | |
912 | strcpy(pbuf.req.svc_id, cp->service_id); | |
913 | ||
778feeb4 | 914 | err = __ds_send(lp, &pbuf, msg_len); |
e450992d DM |
915 | if (err > 0) |
916 | cp->state = CAP_STATE_REG_SENT; | |
917 | } | |
918 | return 0; | |
919 | } | |
920 | ||
921 | static int ds_handshake(struct ds_info *dp, struct ds_msg_tag *pkt) | |
922 | { | |
923 | ||
924 | if (dp->hs_state == DS_HS_START) { | |
925 | if (pkt->type != DS_INIT_ACK) | |
926 | goto conn_reset; | |
927 | ||
928 | dp->hs_state = DS_HS_DONE; | |
929 | ||
930 | return register_services(dp); | |
931 | } | |
932 | ||
933 | if (dp->hs_state != DS_HS_DONE) | |
934 | goto conn_reset; | |
935 | ||
936 | if (pkt->type == DS_REG_ACK) { | |
937 | struct ds_reg_ack *ap = (struct ds_reg_ack *) pkt; | |
5fc98610 | 938 | struct ds_cap_state *cp = find_cap(dp, ap->handle); |
e450992d DM |
939 | |
940 | if (!cp) { | |
90181136 SR |
941 | printk(KERN_ERR "ds-%llu: REG ACK for unknown " |
942 | "handle %llx\n", dp->id, ap->handle); | |
e450992d DM |
943 | return 0; |
944 | } | |
90181136 | 945 | printk(KERN_INFO "ds-%llu: Registered %s service.\n", |
5fc98610 | 946 | dp->id, cp->service_id); |
e450992d DM |
947 | cp->state = CAP_STATE_REGISTERED; |
948 | } else if (pkt->type == DS_REG_NACK) { | |
949 | struct ds_reg_nack *np = (struct ds_reg_nack *) pkt; | |
5fc98610 | 950 | struct ds_cap_state *cp = find_cap(dp, np->handle); |
e450992d DM |
951 | |
952 | if (!cp) { | |
90181136 SR |
953 | printk(KERN_ERR "ds-%llu: REG NACK for " |
954 | "unknown handle %llx\n", | |
5fc98610 | 955 | dp->id, np->handle); |
e450992d DM |
956 | return 0; |
957 | } | |
e450992d DM |
958 | cp->state = CAP_STATE_UNKNOWN; |
959 | } | |
960 | ||
961 | return 0; | |
962 | ||
963 | conn_reset: | |
964 | ds_conn_reset(dp); | |
965 | return -ECONNRESET; | |
966 | } | |
967 | ||
778feeb4 DM |
968 | static void __send_ds_nack(struct ds_info *dp, u64 handle) |
969 | { | |
970 | struct ds_data_nack nack = { | |
971 | .tag = { | |
972 | .type = DS_NACK, | |
973 | .len = (sizeof(struct ds_data_nack) - | |
974 | sizeof(struct ds_msg_tag)), | |
975 | }, | |
976 | .handle = handle, | |
977 | .result = DS_INV_HDL, | |
978 | }; | |
979 | ||
980 | __ds_send(dp->lp, &nack, sizeof(nack)); | |
981 | } | |
982 | ||
983 | static LIST_HEAD(ds_work_list); | |
984 | static DECLARE_WAIT_QUEUE_HEAD(ds_wait); | |
985 | ||
986 | struct ds_queue_entry { | |
987 | struct list_head list; | |
5fc98610 | 988 | struct ds_info *dp; |
778feeb4 DM |
989 | int req_len; |
990 | int __pad; | |
991 | u64 req[0]; | |
992 | }; | |
993 | ||
994 | static void process_ds_work(void) | |
995 | { | |
996 | struct ds_queue_entry *qp, *tmp; | |
778feeb4 DM |
997 | unsigned long flags; |
998 | LIST_HEAD(todo); | |
999 | ||
1000 | spin_lock_irqsave(&ds_lock, flags); | |
1f17131b | 1001 | list_splice_init(&ds_work_list, &todo); |
778feeb4 DM |
1002 | spin_unlock_irqrestore(&ds_lock, flags); |
1003 | ||
778feeb4 DM |
1004 | list_for_each_entry_safe(qp, tmp, &todo, list) { |
1005 | struct ds_data *dpkt = (struct ds_data *) qp->req; | |
5fc98610 DM |
1006 | struct ds_info *dp = qp->dp; |
1007 | struct ds_cap_state *cp = find_cap(dp, dpkt->handle); | |
778feeb4 DM |
1008 | int req_len = qp->req_len; |
1009 | ||
1010 | if (!cp) { | |
90181136 SR |
1011 | printk(KERN_ERR "ds-%llu: Data for unknown " |
1012 | "handle %llu\n", | |
5fc98610 | 1013 | dp->id, dpkt->handle); |
778feeb4 DM |
1014 | |
1015 | spin_lock_irqsave(&ds_lock, flags); | |
1016 | __send_ds_nack(dp, dpkt->handle); | |
1017 | spin_unlock_irqrestore(&ds_lock, flags); | |
1018 | } else { | |
5fc98610 | 1019 | cp->data(dp, cp, dpkt, req_len); |
778feeb4 DM |
1020 | } |
1021 | ||
1022 | list_del(&qp->list); | |
1023 | kfree(qp); | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | static int ds_thread(void *__unused) | |
1028 | { | |
1029 | DEFINE_WAIT(wait); | |
1030 | ||
1031 | while (1) { | |
1032 | prepare_to_wait(&ds_wait, &wait, TASK_INTERRUPTIBLE); | |
1033 | if (list_empty(&ds_work_list)) | |
1034 | schedule(); | |
1035 | finish_wait(&ds_wait, &wait); | |
1036 | ||
1037 | if (kthread_should_stop()) | |
1038 | break; | |
1039 | ||
1040 | process_ds_work(); | |
1041 | } | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
e450992d DM |
1046 | static int ds_data(struct ds_info *dp, struct ds_msg_tag *pkt, int len) |
1047 | { | |
1048 | struct ds_data *dpkt = (struct ds_data *) pkt; | |
778feeb4 DM |
1049 | struct ds_queue_entry *qp; |
1050 | ||
1051 | qp = kmalloc(sizeof(struct ds_queue_entry) + len, GFP_ATOMIC); | |
1052 | if (!qp) { | |
1053 | __send_ds_nack(dp, dpkt->handle); | |
e450992d | 1054 | } else { |
5fc98610 | 1055 | qp->dp = dp; |
778feeb4 DM |
1056 | memcpy(&qp->req, pkt, len); |
1057 | list_add_tail(&qp->list, &ds_work_list); | |
1058 | wake_up(&ds_wait); | |
e450992d DM |
1059 | } |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static void ds_up(struct ds_info *dp) | |
1064 | { | |
1065 | struct ldc_channel *lp = dp->lp; | |
1066 | struct ds_ver_req req; | |
1067 | int err; | |
1068 | ||
1069 | req.tag.type = DS_INIT_REQ; | |
1070 | req.tag.len = sizeof(req) - sizeof(struct ds_msg_tag); | |
1071 | req.ver.major = 1; | |
1072 | req.ver.minor = 0; | |
1073 | ||
778feeb4 | 1074 | err = __ds_send(lp, &req, sizeof(req)); |
e450992d DM |
1075 | if (err > 0) |
1076 | dp->hs_state = DS_HS_START; | |
1077 | } | |
1078 | ||
8a2950cc DM |
1079 | static void ds_reset(struct ds_info *dp) |
1080 | { | |
1081 | int i; | |
1082 | ||
1083 | dp->hs_state = 0; | |
1084 | ||
5fc98610 DM |
1085 | for (i = 0; i < dp->num_ds_states; i++) { |
1086 | struct ds_cap_state *cp = &dp->ds_states[i]; | |
8a2950cc DM |
1087 | |
1088 | cp->state = CAP_STATE_UNKNOWN; | |
1089 | } | |
1090 | } | |
1091 | ||
e450992d DM |
1092 | static void ds_event(void *arg, int event) |
1093 | { | |
1094 | struct ds_info *dp = arg; | |
1095 | struct ldc_channel *lp = dp->lp; | |
1096 | unsigned long flags; | |
1097 | int err; | |
1098 | ||
1099 | spin_lock_irqsave(&ds_lock, flags); | |
1100 | ||
1101 | if (event == LDC_EVENT_UP) { | |
1102 | ds_up(dp); | |
1103 | spin_unlock_irqrestore(&ds_lock, flags); | |
1104 | return; | |
1105 | } | |
1106 | ||
8a2950cc DM |
1107 | if (event == LDC_EVENT_RESET) { |
1108 | ds_reset(dp); | |
1109 | spin_unlock_irqrestore(&ds_lock, flags); | |
1110 | return; | |
1111 | } | |
1112 | ||
e450992d | 1113 | if (event != LDC_EVENT_DATA_READY) { |
90181136 | 1114 | printk(KERN_WARNING "ds-%llu: Unexpected LDC event %d\n", |
5fc98610 | 1115 | dp->id, event); |
e450992d DM |
1116 | spin_unlock_irqrestore(&ds_lock, flags); |
1117 | return; | |
1118 | } | |
1119 | ||
1120 | err = 0; | |
1121 | while (1) { | |
1122 | struct ds_msg_tag *tag; | |
1123 | ||
1124 | err = ldc_read(lp, dp->rcv_buf, sizeof(*tag)); | |
1125 | ||
1126 | if (unlikely(err < 0)) { | |
1127 | if (err == -ECONNRESET) | |
1128 | ds_conn_reset(dp); | |
1129 | break; | |
1130 | } | |
1131 | if (err == 0) | |
1132 | break; | |
1133 | ||
1134 | tag = dp->rcv_buf; | |
1135 | err = ldc_read(lp, tag + 1, tag->len); | |
1136 | ||
1137 | if (unlikely(err < 0)) { | |
1138 | if (err == -ECONNRESET) | |
1139 | ds_conn_reset(dp); | |
1140 | break; | |
1141 | } | |
1142 | if (err < tag->len) | |
1143 | break; | |
1144 | ||
1145 | if (tag->type < DS_DATA) | |
1146 | err = ds_handshake(dp, dp->rcv_buf); | |
1147 | else | |
1148 | err = ds_data(dp, dp->rcv_buf, | |
1149 | sizeof(*tag) + err); | |
1150 | if (err == -ECONNRESET) | |
1151 | break; | |
1152 | } | |
1153 | ||
1154 | spin_unlock_irqrestore(&ds_lock, flags); | |
1155 | } | |
1156 | ||
7c9503b8 | 1157 | static int ds_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
e450992d DM |
1158 | { |
1159 | static int ds_version_printed; | |
e450992d DM |
1160 | struct ldc_channel_config ds_cfg = { |
1161 | .event = ds_event, | |
1162 | .mtu = 4096, | |
1163 | .mode = LDC_MODE_STREAM, | |
1164 | }; | |
5fc98610 | 1165 | struct mdesc_handle *hp; |
e450992d DM |
1166 | struct ldc_channel *lp; |
1167 | struct ds_info *dp; | |
5fc98610 DM |
1168 | const u64 *val; |
1169 | int err, i; | |
e450992d DM |
1170 | |
1171 | if (ds_version_printed++ == 0) | |
1172 | printk(KERN_INFO "%s", version); | |
1173 | ||
e450992d DM |
1174 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
1175 | err = -ENOMEM; | |
1176 | if (!dp) | |
1177 | goto out_err; | |
1178 | ||
5fc98610 DM |
1179 | hp = mdesc_grab(); |
1180 | val = mdesc_get_property(hp, vdev->mp, "id", NULL); | |
1181 | if (val) | |
1182 | dp->id = *val; | |
1183 | mdesc_release(hp); | |
1184 | ||
e450992d DM |
1185 | dp->rcv_buf = kzalloc(4096, GFP_KERNEL); |
1186 | if (!dp->rcv_buf) | |
1187 | goto out_free_dp; | |
1188 | ||
1189 | dp->rcv_buf_len = 4096; | |
1190 | ||
f0a4cf31 TM |
1191 | dp->ds_states = kmemdup(ds_states_template, |
1192 | sizeof(ds_states_template), GFP_KERNEL); | |
5fc98610 DM |
1193 | if (!dp->ds_states) |
1194 | goto out_free_rcv_buf; | |
1195 | ||
5fc98610 DM |
1196 | dp->num_ds_states = ARRAY_SIZE(ds_states_template); |
1197 | ||
1198 | for (i = 0; i < dp->num_ds_states; i++) | |
1199 | dp->ds_states[i].handle = ((u64)i << 32); | |
1200 | ||
43fdf274 DM |
1201 | ds_cfg.tx_irq = vdev->tx_irq; |
1202 | ds_cfg.rx_irq = vdev->rx_irq; | |
e450992d | 1203 | |
c21c4ab0 | 1204 | lp = ldc_alloc(vdev->channel_id, &ds_cfg, dp, "DS"); |
e450992d DM |
1205 | if (IS_ERR(lp)) { |
1206 | err = PTR_ERR(lp); | |
5fc98610 | 1207 | goto out_free_ds_states; |
e450992d DM |
1208 | } |
1209 | dp->lp = lp; | |
1210 | ||
c21c4ab0 | 1211 | err = ldc_bind(lp); |
e450992d DM |
1212 | if (err) |
1213 | goto out_free_ldc; | |
1214 | ||
5fc98610 DM |
1215 | spin_lock_irq(&ds_lock); |
1216 | dp->next = ds_info_list; | |
1217 | ds_info_list = dp; | |
1218 | spin_unlock_irq(&ds_lock); | |
b3e13fbe | 1219 | |
e450992d DM |
1220 | return err; |
1221 | ||
1222 | out_free_ldc: | |
1223 | ldc_free(dp->lp); | |
1224 | ||
5fc98610 DM |
1225 | out_free_ds_states: |
1226 | kfree(dp->ds_states); | |
1227 | ||
e450992d DM |
1228 | out_free_rcv_buf: |
1229 | kfree(dp->rcv_buf); | |
1230 | ||
1231 | out_free_dp: | |
1232 | kfree(dp); | |
1233 | ||
1234 | out_err: | |
1235 | return err; | |
1236 | } | |
1237 | ||
1238 | static int ds_remove(struct vio_dev *vdev) | |
1239 | { | |
1240 | return 0; | |
1241 | } | |
1242 | ||
3628aa06 | 1243 | static const struct vio_device_id ds_match[] = { |
e450992d DM |
1244 | { |
1245 | .type = "domain-services-port", | |
1246 | }, | |
1247 | {}, | |
1248 | }; | |
1249 | ||
1250 | static struct vio_driver ds_driver = { | |
1251 | .id_table = ds_match, | |
1252 | .probe = ds_probe, | |
1253 | .remove = ds_remove, | |
cb52d897 | 1254 | .name = "ds", |
e450992d DM |
1255 | }; |
1256 | ||
1257 | static int __init ds_init(void) | |
1258 | { | |
ea5e7447 DM |
1259 | unsigned long hv_ret, major, minor; |
1260 | ||
c92761fd DM |
1261 | if (tlb_type == hypervisor) { |
1262 | hv_ret = sun4v_get_version(HV_GRP_REBOOT_DATA, &major, &minor); | |
1263 | if (hv_ret == HV_EOK) { | |
1264 | pr_info("SUN4V: Reboot data supported (maj=%lu,min=%lu).\n", | |
1265 | major, minor); | |
1266 | reboot_data_supported = 1; | |
1267 | } | |
ea5e7447 | 1268 | } |
778feeb4 | 1269 | kthread_run(ds_thread, NULL, "kldomd"); |
bd0e11ff | 1270 | |
e450992d DM |
1271 | return vio_register_driver(&ds_driver); |
1272 | } | |
1273 | ||
9e0daff3 | 1274 | fs_initcall(ds_init); |