Commit | Line | Data |
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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> | |
12 | #include <linux/delay.h> | |
b3e13fbe | 13 | #include <linux/mutex.h> |
bd0e11ff | 14 | #include <linux/kthread.h> |
a3761780 | 15 | #include <linux/reboot.h> |
4f0234f4 | 16 | #include <linux/cpu.h> |
e450992d | 17 | |
ea5e7447 | 18 | #include <asm/hypervisor.h> |
e450992d DM |
19 | #include <asm/ldc.h> |
20 | #include <asm/vio.h> | |
43fdf274 | 21 | #include <asm/mdesc.h> |
4f0234f4 | 22 | #include <asm/head.h> |
e0204409 | 23 | #include <asm/irq.h> |
e450992d | 24 | |
ea5e7447 DM |
25 | #include "kernel.h" |
26 | ||
e450992d DM |
27 | #define DRV_MODULE_NAME "ds" |
28 | #define PFX DRV_MODULE_NAME ": " | |
29 | #define DRV_MODULE_VERSION "1.0" | |
30 | #define DRV_MODULE_RELDATE "Jul 11, 2007" | |
31 | ||
7c9503b8 | 32 | static char version[] = |
e450992d DM |
33 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
34 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
35 | MODULE_DESCRIPTION("Sun LDOM domain services driver"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_VERSION(DRV_MODULE_VERSION); | |
38 | ||
39 | struct ds_msg_tag { | |
40 | __u32 type; | |
41 | #define DS_INIT_REQ 0x00 | |
42 | #define DS_INIT_ACK 0x01 | |
43 | #define DS_INIT_NACK 0x02 | |
44 | #define DS_REG_REQ 0x03 | |
45 | #define DS_REG_ACK 0x04 | |
46 | #define DS_REG_NACK 0x05 | |
47 | #define DS_UNREG_REQ 0x06 | |
48 | #define DS_UNREG_ACK 0x07 | |
49 | #define DS_UNREG_NACK 0x08 | |
50 | #define DS_DATA 0x09 | |
51 | #define DS_NACK 0x0a | |
52 | ||
53 | __u32 len; | |
54 | }; | |
55 | ||
56 | /* Result codes */ | |
57 | #define DS_OK 0x00 | |
58 | #define DS_REG_VER_NACK 0x01 | |
59 | #define DS_REG_DUP 0x02 | |
60 | #define DS_INV_HDL 0x03 | |
61 | #define DS_TYPE_UNKNOWN 0x04 | |
62 | ||
63 | struct ds_version { | |
64 | __u16 major; | |
65 | __u16 minor; | |
66 | }; | |
67 | ||
68 | struct ds_ver_req { | |
69 | struct ds_msg_tag tag; | |
70 | struct ds_version ver; | |
71 | }; | |
72 | ||
73 | struct ds_ver_ack { | |
74 | struct ds_msg_tag tag; | |
75 | __u16 minor; | |
76 | }; | |
77 | ||
78 | struct ds_ver_nack { | |
79 | struct ds_msg_tag tag; | |
80 | __u16 major; | |
81 | }; | |
82 | ||
83 | struct ds_reg_req { | |
84 | struct ds_msg_tag tag; | |
85 | __u64 handle; | |
86 | __u16 major; | |
87 | __u16 minor; | |
88 | char svc_id[0]; | |
89 | }; | |
90 | ||
91 | struct ds_reg_ack { | |
92 | struct ds_msg_tag tag; | |
93 | __u64 handle; | |
94 | __u16 minor; | |
95 | }; | |
96 | ||
97 | struct ds_reg_nack { | |
98 | struct ds_msg_tag tag; | |
99 | __u64 handle; | |
100 | __u16 major; | |
101 | }; | |
102 | ||
103 | struct ds_unreg_req { | |
104 | struct ds_msg_tag tag; | |
105 | __u64 handle; | |
106 | }; | |
107 | ||
108 | struct ds_unreg_ack { | |
109 | struct ds_msg_tag tag; | |
110 | __u64 handle; | |
111 | }; | |
112 | ||
113 | struct ds_unreg_nack { | |
114 | struct ds_msg_tag tag; | |
115 | __u64 handle; | |
116 | }; | |
117 | ||
118 | struct ds_data { | |
119 | struct ds_msg_tag tag; | |
120 | __u64 handle; | |
121 | }; | |
122 | ||
123 | struct ds_data_nack { | |
124 | struct ds_msg_tag tag; | |
125 | __u64 handle; | |
126 | __u64 result; | |
127 | }; | |
128 | ||
5fc98610 | 129 | struct ds_info; |
e450992d DM |
130 | struct ds_cap_state { |
131 | __u64 handle; | |
132 | ||
5fc98610 | 133 | void (*data)(struct ds_info *dp, |
4f0234f4 | 134 | struct ds_cap_state *cp, |
e450992d DM |
135 | void *buf, int len); |
136 | ||
137 | const char *service_id; | |
138 | ||
139 | u8 state; | |
140 | #define CAP_STATE_UNKNOWN 0x00 | |
141 | #define CAP_STATE_REG_SENT 0x01 | |
142 | #define CAP_STATE_REGISTERED 0x02 | |
143 | }; | |
144 | ||
5fc98610 | 145 | static void md_update_data(struct ds_info *dp, struct ds_cap_state *cp, |
4f0234f4 | 146 | void *buf, int len); |
5fc98610 | 147 | static void domain_shutdown_data(struct ds_info *dp, |
4f0234f4 DM |
148 | struct ds_cap_state *cp, |
149 | void *buf, int len); | |
5fc98610 | 150 | static void domain_panic_data(struct ds_info *dp, |
4f0234f4 DM |
151 | struct ds_cap_state *cp, |
152 | void *buf, int len); | |
b14f5c10 | 153 | #ifdef CONFIG_HOTPLUG_CPU |
5fc98610 | 154 | static void dr_cpu_data(struct ds_info *dp, |
4f0234f4 DM |
155 | struct ds_cap_state *cp, |
156 | void *buf, int len); | |
b14f5c10 | 157 | #endif |
5fc98610 | 158 | static void ds_pri_data(struct ds_info *dp, |
4f0234f4 DM |
159 | struct ds_cap_state *cp, |
160 | void *buf, int len); | |
5fc98610 | 161 | static void ds_var_data(struct ds_info *dp, |
4f0234f4 DM |
162 | struct ds_cap_state *cp, |
163 | void *buf, int len); | |
164 | ||
908f5162 | 165 | static struct ds_cap_state ds_states_template[] = { |
4f0234f4 DM |
166 | { |
167 | .service_id = "md-update", | |
168 | .data = md_update_data, | |
169 | }, | |
170 | { | |
171 | .service_id = "domain-shutdown", | |
172 | .data = domain_shutdown_data, | |
173 | }, | |
174 | { | |
175 | .service_id = "domain-panic", | |
176 | .data = domain_panic_data, | |
177 | }, | |
b14f5c10 | 178 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 DM |
179 | { |
180 | .service_id = "dr-cpu", | |
181 | .data = dr_cpu_data, | |
182 | }, | |
b14f5c10 | 183 | #endif |
4f0234f4 DM |
184 | { |
185 | .service_id = "pri", | |
186 | .data = ds_pri_data, | |
187 | }, | |
188 | { | |
189 | .service_id = "var-config", | |
190 | .data = ds_var_data, | |
191 | }, | |
192 | { | |
193 | .service_id = "var-config-backup", | |
194 | .data = ds_var_data, | |
195 | }, | |
196 | }; | |
197 | ||
198 | static DEFINE_SPINLOCK(ds_lock); | |
199 | ||
200 | struct ds_info { | |
201 | struct ldc_channel *lp; | |
202 | u8 hs_state; | |
203 | #define DS_HS_START 0x01 | |
204 | #define DS_HS_DONE 0x02 | |
205 | ||
5fc98610 DM |
206 | u64 id; |
207 | ||
4f0234f4 DM |
208 | void *rcv_buf; |
209 | int rcv_buf_len; | |
5fc98610 DM |
210 | |
211 | struct ds_cap_state *ds_states; | |
212 | int num_ds_states; | |
213 | ||
214 | struct ds_info *next; | |
4f0234f4 DM |
215 | }; |
216 | ||
5fc98610 | 217 | static struct ds_info *ds_info_list; |
4f0234f4 | 218 | |
5fc98610 | 219 | static struct ds_cap_state *find_cap(struct ds_info *dp, u64 handle) |
4f0234f4 DM |
220 | { |
221 | unsigned int index = handle >> 32; | |
222 | ||
5fc98610 | 223 | if (index >= dp->num_ds_states) |
4f0234f4 | 224 | return NULL; |
5fc98610 | 225 | return &dp->ds_states[index]; |
4f0234f4 DM |
226 | } |
227 | ||
5fc98610 DM |
228 | static struct ds_cap_state *find_cap_by_string(struct ds_info *dp, |
229 | const char *name) | |
4f0234f4 DM |
230 | { |
231 | int i; | |
232 | ||
5fc98610 DM |
233 | for (i = 0; i < dp->num_ds_states; i++) { |
234 | if (strcmp(dp->ds_states[i].service_id, name)) | |
4f0234f4 DM |
235 | continue; |
236 | ||
5fc98610 | 237 | return &dp->ds_states[i]; |
4f0234f4 DM |
238 | } |
239 | return NULL; | |
240 | } | |
241 | ||
778feeb4 | 242 | static int __ds_send(struct ldc_channel *lp, void *data, int len) |
e450992d DM |
243 | { |
244 | int err, limit = 1000; | |
245 | ||
246 | err = -EINVAL; | |
247 | while (limit-- > 0) { | |
248 | err = ldc_write(lp, data, len); | |
249 | if (!err || (err != -EAGAIN)) | |
250 | break; | |
251 | udelay(1); | |
252 | } | |
253 | ||
254 | return err; | |
255 | } | |
256 | ||
778feeb4 DM |
257 | static int ds_send(struct ldc_channel *lp, void *data, int len) |
258 | { | |
259 | unsigned long flags; | |
260 | int err; | |
261 | ||
262 | spin_lock_irqsave(&ds_lock, flags); | |
263 | err = __ds_send(lp, data, len); | |
264 | spin_unlock_irqrestore(&ds_lock, flags); | |
265 | ||
266 | return err; | |
267 | } | |
268 | ||
e450992d DM |
269 | struct ds_md_update_req { |
270 | __u64 req_num; | |
271 | }; | |
272 | ||
273 | struct ds_md_update_res { | |
274 | __u64 req_num; | |
275 | __u32 result; | |
276 | }; | |
277 | ||
5fc98610 DM |
278 | static void md_update_data(struct ds_info *dp, |
279 | struct ds_cap_state *cp, | |
e450992d DM |
280 | void *buf, int len) |
281 | { | |
5fc98610 | 282 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
283 | struct ds_data *dpkt = buf; |
284 | struct ds_md_update_req *rp; | |
285 | struct { | |
286 | struct ds_data data; | |
287 | struct ds_md_update_res res; | |
288 | } pkt; | |
289 | ||
290 | rp = (struct ds_md_update_req *) (dpkt + 1); | |
291 | ||
90181136 | 292 | printk(KERN_INFO "ds-%llu: Machine description update.\n", dp->id); |
e450992d | 293 | |
778feeb4 DM |
294 | mdesc_update(); |
295 | ||
e450992d DM |
296 | memset(&pkt, 0, sizeof(pkt)); |
297 | pkt.data.tag.type = DS_DATA; | |
298 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 299 | pkt.data.handle = cp->handle; |
e450992d DM |
300 | pkt.res.req_num = rp->req_num; |
301 | pkt.res.result = DS_OK; | |
302 | ||
303 | ds_send(lp, &pkt, sizeof(pkt)); | |
304 | } | |
305 | ||
306 | struct ds_shutdown_req { | |
307 | __u64 req_num; | |
308 | __u32 ms_delay; | |
309 | }; | |
310 | ||
311 | struct ds_shutdown_res { | |
312 | __u64 req_num; | |
313 | __u32 result; | |
314 | char reason[1]; | |
315 | }; | |
316 | ||
5fc98610 DM |
317 | static void domain_shutdown_data(struct ds_info *dp, |
318 | struct ds_cap_state *cp, | |
e450992d DM |
319 | void *buf, int len) |
320 | { | |
5fc98610 | 321 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
322 | struct ds_data *dpkt = buf; |
323 | struct ds_shutdown_req *rp; | |
324 | struct { | |
325 | struct ds_data data; | |
326 | struct ds_shutdown_res res; | |
327 | } pkt; | |
328 | ||
329 | rp = (struct ds_shutdown_req *) (dpkt + 1); | |
330 | ||
90181136 | 331 | printk(KERN_ALERT "ds-%llu: Shutdown request from " |
5fc98610 | 332 | "LDOM manager received.\n", dp->id); |
e450992d DM |
333 | |
334 | memset(&pkt, 0, sizeof(pkt)); | |
335 | pkt.data.tag.type = DS_DATA; | |
336 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 337 | pkt.data.handle = cp->handle; |
e450992d DM |
338 | pkt.res.req_num = rp->req_num; |
339 | pkt.res.result = DS_OK; | |
340 | pkt.res.reason[0] = 0; | |
341 | ||
342 | ds_send(lp, &pkt, sizeof(pkt)); | |
343 | ||
a3761780 | 344 | orderly_poweroff(true); |
e450992d DM |
345 | } |
346 | ||
347 | struct ds_panic_req { | |
348 | __u64 req_num; | |
349 | }; | |
350 | ||
351 | struct ds_panic_res { | |
352 | __u64 req_num; | |
353 | __u32 result; | |
354 | char reason[1]; | |
355 | }; | |
356 | ||
5fc98610 DM |
357 | static void domain_panic_data(struct ds_info *dp, |
358 | struct ds_cap_state *cp, | |
e450992d DM |
359 | void *buf, int len) |
360 | { | |
5fc98610 | 361 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
362 | struct ds_data *dpkt = buf; |
363 | struct ds_panic_req *rp; | |
364 | struct { | |
365 | struct ds_data data; | |
366 | struct ds_panic_res res; | |
367 | } pkt; | |
368 | ||
369 | rp = (struct ds_panic_req *) (dpkt + 1); | |
370 | ||
90181136 | 371 | printk(KERN_ALERT "ds-%llu: Panic request from " |
5fc98610 | 372 | "LDOM manager received.\n", dp->id); |
e450992d DM |
373 | |
374 | memset(&pkt, 0, sizeof(pkt)); | |
375 | pkt.data.tag.type = DS_DATA; | |
376 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 377 | pkt.data.handle = cp->handle; |
e450992d DM |
378 | pkt.res.req_num = rp->req_num; |
379 | pkt.res.result = DS_OK; | |
380 | pkt.res.reason[0] = 0; | |
381 | ||
382 | ds_send(lp, &pkt, sizeof(pkt)); | |
383 | ||
384 | panic("PANIC requested by LDOM manager."); | |
385 | } | |
386 | ||
b14f5c10 | 387 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 | 388 | struct dr_cpu_tag { |
e450992d DM |
389 | __u64 req_num; |
390 | __u32 type; | |
4f0234f4 DM |
391 | #define DR_CPU_CONFIGURE 0x43 |
392 | #define DR_CPU_UNCONFIGURE 0x55 | |
393 | #define DR_CPU_FORCE_UNCONFIGURE 0x46 | |
394 | #define DR_CPU_STATUS 0x53 | |
e450992d DM |
395 | |
396 | /* Responses */ | |
4f0234f4 DM |
397 | #define DR_CPU_OK 0x6f |
398 | #define DR_CPU_ERROR 0x65 | |
e450992d DM |
399 | |
400 | __u32 num_records; | |
401 | }; | |
402 | ||
4f0234f4 DM |
403 | struct dr_cpu_resp_entry { |
404 | __u32 cpu; | |
405 | __u32 result; | |
406 | #define DR_CPU_RES_OK 0x00 | |
407 | #define DR_CPU_RES_FAILURE 0x01 | |
408 | #define DR_CPU_RES_BLOCKED 0x02 | |
409 | #define DR_CPU_RES_CPU_NOT_RESPONDING 0x03 | |
410 | #define DR_CPU_RES_NOT_IN_MD 0x04 | |
411 | ||
412 | __u32 stat; | |
413 | #define DR_CPU_STAT_NOT_PRESENT 0x00 | |
414 | #define DR_CPU_STAT_UNCONFIGURED 0x01 | |
415 | #define DR_CPU_STAT_CONFIGURED 0x02 | |
416 | ||
417 | __u32 str_off; | |
e450992d DM |
418 | }; |
419 | ||
5fc98610 DM |
420 | static void __dr_cpu_send_error(struct ds_info *dp, |
421 | struct ds_cap_state *cp, | |
422 | struct ds_data *data) | |
4f0234f4 DM |
423 | { |
424 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
4f0234f4 DM |
425 | struct { |
426 | struct ds_data data; | |
427 | struct dr_cpu_tag tag; | |
428 | } pkt; | |
429 | int msg_len; | |
430 | ||
431 | memset(&pkt, 0, sizeof(pkt)); | |
432 | pkt.data.tag.type = DS_DATA; | |
433 | pkt.data.handle = cp->handle; | |
434 | pkt.tag.req_num = tag->req_num; | |
435 | pkt.tag.type = DR_CPU_ERROR; | |
436 | pkt.tag.num_records = 0; | |
437 | ||
438 | msg_len = (sizeof(struct ds_data) + | |
439 | sizeof(struct dr_cpu_tag)); | |
440 | ||
441 | pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
442 | ||
778feeb4 | 443 | __ds_send(dp->lp, &pkt, msg_len); |
4f0234f4 DM |
444 | } |
445 | ||
5fc98610 DM |
446 | static void dr_cpu_send_error(struct ds_info *dp, |
447 | struct ds_cap_state *cp, | |
448 | struct ds_data *data) | |
4f0234f4 DM |
449 | { |
450 | unsigned long flags; | |
451 | ||
452 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 453 | __dr_cpu_send_error(dp, cp, data); |
4f0234f4 DM |
454 | spin_unlock_irqrestore(&ds_lock, flags); |
455 | } | |
456 | ||
457 | #define CPU_SENTINEL 0xffffffff | |
458 | ||
459 | static void purge_dups(u32 *list, u32 num_ents) | |
460 | { | |
461 | unsigned int i; | |
462 | ||
463 | for (i = 0; i < num_ents; i++) { | |
464 | u32 cpu = list[i]; | |
465 | unsigned int j; | |
466 | ||
467 | if (cpu == CPU_SENTINEL) | |
468 | continue; | |
469 | ||
470 | for (j = i + 1; j < num_ents; j++) { | |
471 | if (list[j] == cpu) | |
472 | list[j] = CPU_SENTINEL; | |
473 | } | |
474 | } | |
475 | } | |
476 | ||
477 | static int dr_cpu_size_response(int ncpus) | |
478 | { | |
479 | return (sizeof(struct ds_data) + | |
480 | sizeof(struct dr_cpu_tag) + | |
481 | (sizeof(struct dr_cpu_resp_entry) * ncpus)); | |
482 | } | |
483 | ||
484 | static void dr_cpu_init_response(struct ds_data *resp, u64 req_num, | |
485 | u64 handle, int resp_len, int ncpus, | |
486 | cpumask_t *mask, u32 default_stat) | |
487 | { | |
488 | struct dr_cpu_resp_entry *ent; | |
489 | struct dr_cpu_tag *tag; | |
490 | int i, cpu; | |
491 | ||
492 | tag = (struct dr_cpu_tag *) (resp + 1); | |
493 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
494 | ||
495 | resp->tag.type = DS_DATA; | |
496 | resp->tag.len = resp_len - sizeof(struct ds_msg_tag); | |
497 | resp->handle = handle; | |
498 | tag->req_num = req_num; | |
499 | tag->type = DR_CPU_OK; | |
500 | tag->num_records = ncpus; | |
501 | ||
502 | i = 0; | |
fb1fece5 | 503 | for_each_cpu(cpu, mask) { |
4f0234f4 DM |
504 | ent[i].cpu = cpu; |
505 | ent[i].result = DR_CPU_RES_OK; | |
506 | ent[i].stat = default_stat; | |
507 | i++; | |
508 | } | |
509 | BUG_ON(i != ncpus); | |
510 | } | |
511 | ||
512 | static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus, | |
513 | u32 res, u32 stat) | |
514 | { | |
515 | struct dr_cpu_resp_entry *ent; | |
516 | struct dr_cpu_tag *tag; | |
517 | int i; | |
518 | ||
519 | tag = (struct dr_cpu_tag *) (resp + 1); | |
520 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
521 | ||
522 | for (i = 0; i < ncpus; i++) { | |
523 | if (ent[i].cpu != cpu) | |
524 | continue; | |
525 | ent[i].result = res; | |
526 | ent[i].stat = stat; | |
527 | break; | |
528 | } | |
529 | } | |
530 | ||
2066aadd PG |
531 | static int dr_cpu_configure(struct ds_info *dp, struct ds_cap_state *cp, |
532 | u64 req_num, cpumask_t *mask) | |
4f0234f4 DM |
533 | { |
534 | struct ds_data *resp; | |
535 | int resp_len, ncpus, cpu; | |
536 | unsigned long flags; | |
537 | ||
fb1fece5 | 538 | ncpus = cpumask_weight(mask); |
4f0234f4 DM |
539 | resp_len = dr_cpu_size_response(ncpus); |
540 | resp = kzalloc(resp_len, GFP_KERNEL); | |
541 | if (!resp) | |
542 | return -ENOMEM; | |
543 | ||
544 | dr_cpu_init_response(resp, req_num, cp->handle, | |
545 | resp_len, ncpus, mask, | |
546 | DR_CPU_STAT_CONFIGURED); | |
547 | ||
b696fdc2 | 548 | mdesc_populate_present_mask(mask); |
a2094502 | 549 | mdesc_fill_in_cpu_data(mask); |
4f0234f4 | 550 | |
fb1fece5 | 551 | for_each_cpu(cpu, mask) { |
4f0234f4 DM |
552 | int err; |
553 | ||
90181136 | 554 | printk(KERN_INFO "ds-%llu: Starting cpu %d...\n", |
5fc98610 | 555 | dp->id, cpu); |
4f0234f4 | 556 | err = cpu_up(cpu); |
bd0e11ff | 557 | if (err) { |
9918cc2e DM |
558 | __u32 res = DR_CPU_RES_FAILURE; |
559 | __u32 stat = DR_CPU_STAT_UNCONFIGURED; | |
560 | ||
561 | if (!cpu_present(cpu)) { | |
562 | /* CPU not present in MD */ | |
563 | res = DR_CPU_RES_NOT_IN_MD; | |
564 | stat = DR_CPU_STAT_NOT_PRESENT; | |
565 | } else if (err == -ENODEV) { | |
566 | /* CPU did not call in successfully */ | |
567 | res = DR_CPU_RES_CPU_NOT_RESPONDING; | |
568 | } | |
569 | ||
90181136 | 570 | printk(KERN_INFO "ds-%llu: CPU startup failed err=%d\n", |
5fc98610 | 571 | dp->id, err); |
9918cc2e | 572 | dr_cpu_mark(resp, cpu, ncpus, res, stat); |
bd0e11ff | 573 | } |
4f0234f4 DM |
574 | } |
575 | ||
576 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 577 | __ds_send(dp->lp, resp, resp_len); |
4f0234f4 DM |
578 | spin_unlock_irqrestore(&ds_lock, flags); |
579 | ||
580 | kfree(resp); | |
581 | ||
e0204409 DM |
582 | /* Redistribute IRQs, taking into account the new cpus. */ |
583 | fixup_irqs(); | |
584 | ||
4f0234f4 DM |
585 | return 0; |
586 | } | |
587 | ||
5fc98610 DM |
588 | static int dr_cpu_unconfigure(struct ds_info *dp, |
589 | struct ds_cap_state *cp, | |
590 | u64 req_num, | |
4f0234f4 DM |
591 | cpumask_t *mask) |
592 | { | |
593 | struct ds_data *resp; | |
e0204409 DM |
594 | int resp_len, ncpus, cpu; |
595 | unsigned long flags; | |
4f0234f4 | 596 | |
fb1fece5 | 597 | ncpus = cpumask_weight(mask); |
4f0234f4 DM |
598 | resp_len = dr_cpu_size_response(ncpus); |
599 | resp = kzalloc(resp_len, GFP_KERNEL); | |
600 | if (!resp) | |
601 | return -ENOMEM; | |
602 | ||
603 | dr_cpu_init_response(resp, req_num, cp->handle, | |
604 | resp_len, ncpus, mask, | |
605 | DR_CPU_STAT_UNCONFIGURED); | |
606 | ||
fb1fece5 | 607 | for_each_cpu(cpu, mask) { |
e0204409 DM |
608 | int err; |
609 | ||
90181136 | 610 | printk(KERN_INFO "ds-%llu: Shutting down cpu %d...\n", |
5fc98610 | 611 | dp->id, cpu); |
e0204409 DM |
612 | err = cpu_down(cpu); |
613 | if (err) | |
614 | dr_cpu_mark(resp, cpu, ncpus, | |
615 | DR_CPU_RES_FAILURE, | |
616 | DR_CPU_STAT_CONFIGURED); | |
617 | } | |
618 | ||
619 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 620 | __ds_send(dp->lp, resp, resp_len); |
e0204409 DM |
621 | spin_unlock_irqrestore(&ds_lock, flags); |
622 | ||
4f0234f4 DM |
623 | kfree(resp); |
624 | ||
e0204409 | 625 | return 0; |
4f0234f4 DM |
626 | } |
627 | ||
2066aadd PG |
628 | static void dr_cpu_data(struct ds_info *dp, struct ds_cap_state *cp, void *buf, |
629 | int len) | |
4f0234f4 | 630 | { |
778feeb4 DM |
631 | struct ds_data *data = buf; |
632 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
633 | u32 *cpu_list = (u32 *) (tag + 1); | |
634 | u64 req_num = tag->req_num; | |
4f0234f4 | 635 | cpumask_t mask; |
778feeb4 DM |
636 | unsigned int i; |
637 | int err; | |
4f0234f4 | 638 | |
778feeb4 DM |
639 | switch (tag->type) { |
640 | case DR_CPU_CONFIGURE: | |
641 | case DR_CPU_UNCONFIGURE: | |
642 | case DR_CPU_FORCE_UNCONFIGURE: | |
643 | break; | |
4f0234f4 | 644 | |
778feeb4 | 645 | default: |
5fc98610 | 646 | dr_cpu_send_error(dp, cp, data); |
778feeb4 | 647 | return; |
4f0234f4 | 648 | } |
4f0234f4 | 649 | |
778feeb4 | 650 | purge_dups(cpu_list, tag->num_records); |
bd0e11ff | 651 | |
fb1fece5 | 652 | cpumask_clear(&mask); |
778feeb4 DM |
653 | for (i = 0; i < tag->num_records; i++) { |
654 | if (cpu_list[i] == CPU_SENTINEL) | |
655 | continue; | |
bd0e11ff | 656 | |
e305cb8f | 657 | if (cpu_list[i] < nr_cpu_ids) |
fb1fece5 | 658 | cpumask_set_cpu(cpu_list[i], &mask); |
bd0e11ff DM |
659 | } |
660 | ||
778feeb4 | 661 | if (tag->type == DR_CPU_CONFIGURE) |
5fc98610 | 662 | err = dr_cpu_configure(dp, cp, req_num, &mask); |
778feeb4 | 663 | else |
5fc98610 | 664 | err = dr_cpu_unconfigure(dp, cp, req_num, &mask); |
e450992d | 665 | |
778feeb4 | 666 | if (err) |
5fc98610 | 667 | dr_cpu_send_error(dp, cp, data); |
e450992d | 668 | } |
778feeb4 | 669 | #endif /* CONFIG_HOTPLUG_CPU */ |
e450992d DM |
670 | |
671 | struct ds_pri_msg { | |
672 | __u64 req_num; | |
673 | __u64 type; | |
674 | #define DS_PRI_REQUEST 0x00 | |
675 | #define DS_PRI_DATA 0x01 | |
676 | #define DS_PRI_UPDATE 0x02 | |
677 | }; | |
678 | ||
5fc98610 DM |
679 | static void ds_pri_data(struct ds_info *dp, |
680 | struct ds_cap_state *cp, | |
e450992d DM |
681 | void *buf, int len) |
682 | { | |
683 | struct ds_data *dpkt = buf; | |
684 | struct ds_pri_msg *rp; | |
685 | ||
686 | rp = (struct ds_pri_msg *) (dpkt + 1); | |
687 | ||
90181136 | 688 | printk(KERN_INFO "ds-%llu: PRI REQ [%llx:%llx], len=%d\n", |
5fc98610 | 689 | dp->id, rp->req_num, rp->type, len); |
e450992d DM |
690 | } |
691 | ||
b3e13fbe DM |
692 | struct ds_var_hdr { |
693 | __u32 type; | |
694 | #define DS_VAR_SET_REQ 0x00 | |
695 | #define DS_VAR_DELETE_REQ 0x01 | |
696 | #define DS_VAR_SET_RESP 0x02 | |
697 | #define DS_VAR_DELETE_RESP 0x03 | |
698 | }; | |
699 | ||
700 | struct ds_var_set_msg { | |
701 | struct ds_var_hdr hdr; | |
702 | char name_and_value[0]; | |
703 | }; | |
704 | ||
705 | struct ds_var_delete_msg { | |
706 | struct ds_var_hdr hdr; | |
707 | char name[0]; | |
708 | }; | |
709 | ||
710 | struct ds_var_resp { | |
711 | struct ds_var_hdr hdr; | |
712 | __u32 result; | |
713 | #define DS_VAR_SUCCESS 0x00 | |
714 | #define DS_VAR_NO_SPACE 0x01 | |
715 | #define DS_VAR_INVALID_VAR 0x02 | |
716 | #define DS_VAR_INVALID_VAL 0x03 | |
717 | #define DS_VAR_NOT_PRESENT 0x04 | |
718 | }; | |
719 | ||
720 | static DEFINE_MUTEX(ds_var_mutex); | |
721 | static int ds_var_doorbell; | |
722 | static int ds_var_response; | |
723 | ||
5fc98610 DM |
724 | static void ds_var_data(struct ds_info *dp, |
725 | struct ds_cap_state *cp, | |
b3e13fbe DM |
726 | void *buf, int len) |
727 | { | |
728 | struct ds_data *dpkt = buf; | |
729 | struct ds_var_resp *rp; | |
730 | ||
731 | rp = (struct ds_var_resp *) (dpkt + 1); | |
732 | ||
733 | if (rp->hdr.type != DS_VAR_SET_RESP && | |
734 | rp->hdr.type != DS_VAR_DELETE_RESP) | |
735 | return; | |
736 | ||
737 | ds_var_response = rp->result; | |
738 | wmb(); | |
739 | ds_var_doorbell = 1; | |
740 | } | |
741 | ||
b3e13fbe DM |
742 | void ldom_set_var(const char *var, const char *value) |
743 | { | |
b3e13fbe | 744 | struct ds_cap_state *cp; |
5fc98610 DM |
745 | struct ds_info *dp; |
746 | unsigned long flags; | |
747 | ||
748 | spin_lock_irqsave(&ds_lock, flags); | |
749 | cp = NULL; | |
750 | for (dp = ds_info_list; dp; dp = dp->next) { | |
751 | struct ds_cap_state *tmp; | |
752 | ||
753 | tmp = find_cap_by_string(dp, "var-config"); | |
754 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
755 | cp = tmp; | |
756 | break; | |
757 | } | |
758 | } | |
759 | if (!cp) { | |
760 | for (dp = ds_info_list; dp; dp = dp->next) { | |
761 | struct ds_cap_state *tmp; | |
b3e13fbe | 762 | |
5fc98610 DM |
763 | tmp = find_cap_by_string(dp, "var-config-backup"); |
764 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
765 | cp = tmp; | |
766 | break; | |
767 | } | |
768 | } | |
769 | } | |
770 | spin_unlock_irqrestore(&ds_lock, flags); | |
b3e13fbe | 771 | |
5fc98610 | 772 | if (cp) { |
b3e13fbe DM |
773 | union { |
774 | struct { | |
775 | struct ds_data data; | |
776 | struct ds_var_set_msg msg; | |
777 | } header; | |
778 | char all[512]; | |
779 | } pkt; | |
b3e13fbe DM |
780 | char *base, *p; |
781 | int msg_len, loops; | |
782 | ||
f118e9ab CG |
783 | if (strlen(var) + strlen(value) + 2 > |
784 | sizeof(pkt) - sizeof(pkt.header)) { | |
785 | printk(KERN_ERR PFX | |
786 | "contents length: %zu, which more than max: %lu," | |
787 | "so could not set (%s) variable to (%s).\n", | |
788 | strlen(var) + strlen(value) + 2, | |
789 | sizeof(pkt) - sizeof(pkt.header), var, value); | |
790 | return; | |
791 | } | |
792 | ||
b3e13fbe DM |
793 | memset(&pkt, 0, sizeof(pkt)); |
794 | pkt.header.data.tag.type = DS_DATA; | |
795 | pkt.header.data.handle = cp->handle; | |
796 | pkt.header.msg.hdr.type = DS_VAR_SET_REQ; | |
797 | base = p = &pkt.header.msg.name_and_value[0]; | |
798 | strcpy(p, var); | |
799 | p += strlen(var) + 1; | |
800 | strcpy(p, value); | |
801 | p += strlen(value) + 1; | |
802 | ||
803 | msg_len = (sizeof(struct ds_data) + | |
4f0234f4 DM |
804 | sizeof(struct ds_var_set_msg) + |
805 | (p - base)); | |
b3e13fbe DM |
806 | msg_len = (msg_len + 3) & ~3; |
807 | pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
808 | ||
809 | mutex_lock(&ds_var_mutex); | |
810 | ||
811 | spin_lock_irqsave(&ds_lock, flags); | |
812 | ds_var_doorbell = 0; | |
813 | ds_var_response = -1; | |
814 | ||
778feeb4 | 815 | __ds_send(dp->lp, &pkt, msg_len); |
b3e13fbe DM |
816 | spin_unlock_irqrestore(&ds_lock, flags); |
817 | ||
818 | loops = 1000; | |
819 | while (ds_var_doorbell == 0) { | |
820 | if (loops-- < 0) | |
821 | break; | |
822 | barrier(); | |
823 | udelay(100); | |
824 | } | |
825 | ||
826 | mutex_unlock(&ds_var_mutex); | |
827 | ||
828 | if (ds_var_doorbell == 0 || | |
829 | ds_var_response != DS_VAR_SUCCESS) | |
90181136 | 830 | printk(KERN_ERR "ds-%llu: var-config [%s:%s] " |
b3e13fbe | 831 | "failed, response(%d).\n", |
5fc98610 | 832 | dp->id, var, value, |
b3e13fbe DM |
833 | ds_var_response); |
834 | } else { | |
835 | printk(KERN_ERR PFX "var-config not registered so " | |
836 | "could not set (%s) variable to (%s).\n", | |
837 | var, value); | |
838 | } | |
839 | } | |
840 | ||
ea5e7447 DM |
841 | static char full_boot_str[256] __attribute__((aligned(32))); |
842 | static int reboot_data_supported; | |
843 | ||
b3e13fbe DM |
844 | void ldom_reboot(const char *boot_command) |
845 | { | |
846 | /* Don't bother with any of this if the boot_command | |
847 | * is empty. | |
848 | */ | |
849 | if (boot_command && strlen(boot_command)) { | |
ea5e7447 | 850 | unsigned long len; |
b3e13fbe | 851 | |
20928bd3 KC |
852 | snprintf(full_boot_str, sizeof(full_boot_str), "boot %s", |
853 | boot_command); | |
ea5e7447 | 854 | len = strlen(full_boot_str); |
b3e13fbe | 855 | |
ea5e7447 DM |
856 | if (reboot_data_supported) { |
857 | unsigned long ra = kimage_addr_to_ra(full_boot_str); | |
858 | unsigned long hv_ret; | |
859 | ||
860 | hv_ret = sun4v_reboot_data_set(ra, len); | |
861 | if (hv_ret != HV_EOK) | |
862 | pr_err("SUN4V: Unable to set reboot data " | |
863 | "hv_ret=%lu\n", hv_ret); | |
864 | } else { | |
865 | ldom_set_var("reboot-command", full_boot_str); | |
866 | } | |
b3e13fbe DM |
867 | } |
868 | sun4v_mach_sir(); | |
869 | } | |
870 | ||
4f0234f4 DM |
871 | void ldom_power_off(void) |
872 | { | |
873 | sun4v_mach_exit(0); | |
874 | } | |
875 | ||
e450992d DM |
876 | static void ds_conn_reset(struct ds_info *dp) |
877 | { | |
e9b57cca | 878 | printk(KERN_ERR "ds-%llu: ds_conn_reset() from %pf\n", |
5fc98610 | 879 | dp->id, __builtin_return_address(0)); |
e450992d DM |
880 | } |
881 | ||
882 | static int register_services(struct ds_info *dp) | |
883 | { | |
884 | struct ldc_channel *lp = dp->lp; | |
885 | int i; | |
886 | ||
5fc98610 | 887 | for (i = 0; i < dp->num_ds_states; i++) { |
e450992d DM |
888 | struct { |
889 | struct ds_reg_req req; | |
890 | u8 id_buf[256]; | |
891 | } pbuf; | |
5fc98610 | 892 | struct ds_cap_state *cp = &dp->ds_states[i]; |
e450992d DM |
893 | int err, msg_len; |
894 | u64 new_count; | |
895 | ||
896 | if (cp->state == CAP_STATE_REGISTERED) | |
897 | continue; | |
898 | ||
899 | new_count = sched_clock() & 0xffffffff; | |
900 | cp->handle = ((u64) i << 32) | new_count; | |
901 | ||
902 | msg_len = (sizeof(struct ds_reg_req) + | |
903 | strlen(cp->service_id)); | |
904 | ||
905 | memset(&pbuf, 0, sizeof(pbuf)); | |
906 | pbuf.req.tag.type = DS_REG_REQ; | |
907 | pbuf.req.tag.len = (msg_len - sizeof(struct ds_msg_tag)); | |
908 | pbuf.req.handle = cp->handle; | |
909 | pbuf.req.major = 1; | |
910 | pbuf.req.minor = 0; | |
911 | strcpy(pbuf.req.svc_id, cp->service_id); | |
912 | ||
778feeb4 | 913 | err = __ds_send(lp, &pbuf, msg_len); |
e450992d DM |
914 | if (err > 0) |
915 | cp->state = CAP_STATE_REG_SENT; | |
916 | } | |
917 | return 0; | |
918 | } | |
919 | ||
920 | static int ds_handshake(struct ds_info *dp, struct ds_msg_tag *pkt) | |
921 | { | |
922 | ||
923 | if (dp->hs_state == DS_HS_START) { | |
924 | if (pkt->type != DS_INIT_ACK) | |
925 | goto conn_reset; | |
926 | ||
927 | dp->hs_state = DS_HS_DONE; | |
928 | ||
929 | return register_services(dp); | |
930 | } | |
931 | ||
932 | if (dp->hs_state != DS_HS_DONE) | |
933 | goto conn_reset; | |
934 | ||
935 | if (pkt->type == DS_REG_ACK) { | |
936 | struct ds_reg_ack *ap = (struct ds_reg_ack *) pkt; | |
5fc98610 | 937 | struct ds_cap_state *cp = find_cap(dp, ap->handle); |
e450992d DM |
938 | |
939 | if (!cp) { | |
90181136 SR |
940 | printk(KERN_ERR "ds-%llu: REG ACK for unknown " |
941 | "handle %llx\n", dp->id, ap->handle); | |
e450992d DM |
942 | return 0; |
943 | } | |
90181136 | 944 | printk(KERN_INFO "ds-%llu: Registered %s service.\n", |
5fc98610 | 945 | dp->id, cp->service_id); |
e450992d DM |
946 | cp->state = CAP_STATE_REGISTERED; |
947 | } else if (pkt->type == DS_REG_NACK) { | |
948 | struct ds_reg_nack *np = (struct ds_reg_nack *) pkt; | |
5fc98610 | 949 | struct ds_cap_state *cp = find_cap(dp, np->handle); |
e450992d DM |
950 | |
951 | if (!cp) { | |
90181136 SR |
952 | printk(KERN_ERR "ds-%llu: REG NACK for " |
953 | "unknown handle %llx\n", | |
5fc98610 | 954 | dp->id, np->handle); |
e450992d DM |
955 | return 0; |
956 | } | |
e450992d DM |
957 | cp->state = CAP_STATE_UNKNOWN; |
958 | } | |
959 | ||
960 | return 0; | |
961 | ||
962 | conn_reset: | |
963 | ds_conn_reset(dp); | |
964 | return -ECONNRESET; | |
965 | } | |
966 | ||
778feeb4 DM |
967 | static void __send_ds_nack(struct ds_info *dp, u64 handle) |
968 | { | |
969 | struct ds_data_nack nack = { | |
970 | .tag = { | |
971 | .type = DS_NACK, | |
972 | .len = (sizeof(struct ds_data_nack) - | |
973 | sizeof(struct ds_msg_tag)), | |
974 | }, | |
975 | .handle = handle, | |
976 | .result = DS_INV_HDL, | |
977 | }; | |
978 | ||
979 | __ds_send(dp->lp, &nack, sizeof(nack)); | |
980 | } | |
981 | ||
982 | static LIST_HEAD(ds_work_list); | |
983 | static DECLARE_WAIT_QUEUE_HEAD(ds_wait); | |
984 | ||
985 | struct ds_queue_entry { | |
986 | struct list_head list; | |
5fc98610 | 987 | struct ds_info *dp; |
778feeb4 DM |
988 | int req_len; |
989 | int __pad; | |
990 | u64 req[0]; | |
991 | }; | |
992 | ||
993 | static void process_ds_work(void) | |
994 | { | |
995 | struct ds_queue_entry *qp, *tmp; | |
778feeb4 DM |
996 | unsigned long flags; |
997 | LIST_HEAD(todo); | |
998 | ||
999 | spin_lock_irqsave(&ds_lock, flags); | |
1f17131b | 1000 | list_splice_init(&ds_work_list, &todo); |
778feeb4 DM |
1001 | spin_unlock_irqrestore(&ds_lock, flags); |
1002 | ||
778feeb4 DM |
1003 | list_for_each_entry_safe(qp, tmp, &todo, list) { |
1004 | struct ds_data *dpkt = (struct ds_data *) qp->req; | |
5fc98610 DM |
1005 | struct ds_info *dp = qp->dp; |
1006 | struct ds_cap_state *cp = find_cap(dp, dpkt->handle); | |
778feeb4 DM |
1007 | int req_len = qp->req_len; |
1008 | ||
1009 | if (!cp) { | |
90181136 SR |
1010 | printk(KERN_ERR "ds-%llu: Data for unknown " |
1011 | "handle %llu\n", | |
5fc98610 | 1012 | dp->id, dpkt->handle); |
778feeb4 DM |
1013 | |
1014 | spin_lock_irqsave(&ds_lock, flags); | |
1015 | __send_ds_nack(dp, dpkt->handle); | |
1016 | spin_unlock_irqrestore(&ds_lock, flags); | |
1017 | } else { | |
5fc98610 | 1018 | cp->data(dp, cp, dpkt, req_len); |
778feeb4 DM |
1019 | } |
1020 | ||
1021 | list_del(&qp->list); | |
1022 | kfree(qp); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | static int ds_thread(void *__unused) | |
1027 | { | |
1028 | DEFINE_WAIT(wait); | |
1029 | ||
1030 | while (1) { | |
1031 | prepare_to_wait(&ds_wait, &wait, TASK_INTERRUPTIBLE); | |
1032 | if (list_empty(&ds_work_list)) | |
1033 | schedule(); | |
1034 | finish_wait(&ds_wait, &wait); | |
1035 | ||
1036 | if (kthread_should_stop()) | |
1037 | break; | |
1038 | ||
1039 | process_ds_work(); | |
1040 | } | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
e450992d DM |
1045 | static int ds_data(struct ds_info *dp, struct ds_msg_tag *pkt, int len) |
1046 | { | |
1047 | struct ds_data *dpkt = (struct ds_data *) pkt; | |
778feeb4 DM |
1048 | struct ds_queue_entry *qp; |
1049 | ||
1050 | qp = kmalloc(sizeof(struct ds_queue_entry) + len, GFP_ATOMIC); | |
1051 | if (!qp) { | |
1052 | __send_ds_nack(dp, dpkt->handle); | |
e450992d | 1053 | } else { |
5fc98610 | 1054 | qp->dp = dp; |
778feeb4 DM |
1055 | memcpy(&qp->req, pkt, len); |
1056 | list_add_tail(&qp->list, &ds_work_list); | |
1057 | wake_up(&ds_wait); | |
e450992d DM |
1058 | } |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static void ds_up(struct ds_info *dp) | |
1063 | { | |
1064 | struct ldc_channel *lp = dp->lp; | |
1065 | struct ds_ver_req req; | |
1066 | int err; | |
1067 | ||
1068 | req.tag.type = DS_INIT_REQ; | |
1069 | req.tag.len = sizeof(req) - sizeof(struct ds_msg_tag); | |
1070 | req.ver.major = 1; | |
1071 | req.ver.minor = 0; | |
1072 | ||
778feeb4 | 1073 | err = __ds_send(lp, &req, sizeof(req)); |
e450992d DM |
1074 | if (err > 0) |
1075 | dp->hs_state = DS_HS_START; | |
1076 | } | |
1077 | ||
8a2950cc DM |
1078 | static void ds_reset(struct ds_info *dp) |
1079 | { | |
1080 | int i; | |
1081 | ||
1082 | dp->hs_state = 0; | |
1083 | ||
5fc98610 DM |
1084 | for (i = 0; i < dp->num_ds_states; i++) { |
1085 | struct ds_cap_state *cp = &dp->ds_states[i]; | |
8a2950cc DM |
1086 | |
1087 | cp->state = CAP_STATE_UNKNOWN; | |
1088 | } | |
1089 | } | |
1090 | ||
e450992d DM |
1091 | static void ds_event(void *arg, int event) |
1092 | { | |
1093 | struct ds_info *dp = arg; | |
1094 | struct ldc_channel *lp = dp->lp; | |
1095 | unsigned long flags; | |
1096 | int err; | |
1097 | ||
1098 | spin_lock_irqsave(&ds_lock, flags); | |
1099 | ||
1100 | if (event == LDC_EVENT_UP) { | |
1101 | ds_up(dp); | |
1102 | spin_unlock_irqrestore(&ds_lock, flags); | |
1103 | return; | |
1104 | } | |
1105 | ||
8a2950cc DM |
1106 | if (event == LDC_EVENT_RESET) { |
1107 | ds_reset(dp); | |
1108 | spin_unlock_irqrestore(&ds_lock, flags); | |
1109 | return; | |
1110 | } | |
1111 | ||
e450992d | 1112 | if (event != LDC_EVENT_DATA_READY) { |
90181136 | 1113 | printk(KERN_WARNING "ds-%llu: Unexpected LDC event %d\n", |
5fc98610 | 1114 | dp->id, event); |
e450992d DM |
1115 | spin_unlock_irqrestore(&ds_lock, flags); |
1116 | return; | |
1117 | } | |
1118 | ||
1119 | err = 0; | |
1120 | while (1) { | |
1121 | struct ds_msg_tag *tag; | |
1122 | ||
1123 | err = ldc_read(lp, dp->rcv_buf, sizeof(*tag)); | |
1124 | ||
1125 | if (unlikely(err < 0)) { | |
1126 | if (err == -ECONNRESET) | |
1127 | ds_conn_reset(dp); | |
1128 | break; | |
1129 | } | |
1130 | if (err == 0) | |
1131 | break; | |
1132 | ||
1133 | tag = dp->rcv_buf; | |
1134 | err = ldc_read(lp, tag + 1, tag->len); | |
1135 | ||
1136 | if (unlikely(err < 0)) { | |
1137 | if (err == -ECONNRESET) | |
1138 | ds_conn_reset(dp); | |
1139 | break; | |
1140 | } | |
1141 | if (err < tag->len) | |
1142 | break; | |
1143 | ||
1144 | if (tag->type < DS_DATA) | |
1145 | err = ds_handshake(dp, dp->rcv_buf); | |
1146 | else | |
1147 | err = ds_data(dp, dp->rcv_buf, | |
1148 | sizeof(*tag) + err); | |
1149 | if (err == -ECONNRESET) | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | spin_unlock_irqrestore(&ds_lock, flags); | |
1154 | } | |
1155 | ||
7c9503b8 | 1156 | static int ds_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
e450992d DM |
1157 | { |
1158 | static int ds_version_printed; | |
e450992d DM |
1159 | struct ldc_channel_config ds_cfg = { |
1160 | .event = ds_event, | |
1161 | .mtu = 4096, | |
1162 | .mode = LDC_MODE_STREAM, | |
1163 | }; | |
5fc98610 | 1164 | struct mdesc_handle *hp; |
e450992d DM |
1165 | struct ldc_channel *lp; |
1166 | struct ds_info *dp; | |
5fc98610 DM |
1167 | const u64 *val; |
1168 | int err, i; | |
e450992d DM |
1169 | |
1170 | if (ds_version_printed++ == 0) | |
1171 | printk(KERN_INFO "%s", version); | |
1172 | ||
e450992d DM |
1173 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
1174 | err = -ENOMEM; | |
1175 | if (!dp) | |
1176 | goto out_err; | |
1177 | ||
5fc98610 DM |
1178 | hp = mdesc_grab(); |
1179 | val = mdesc_get_property(hp, vdev->mp, "id", NULL); | |
1180 | if (val) | |
1181 | dp->id = *val; | |
1182 | mdesc_release(hp); | |
1183 | ||
e450992d DM |
1184 | dp->rcv_buf = kzalloc(4096, GFP_KERNEL); |
1185 | if (!dp->rcv_buf) | |
1186 | goto out_free_dp; | |
1187 | ||
1188 | dp->rcv_buf_len = 4096; | |
1189 | ||
f0a4cf31 TM |
1190 | dp->ds_states = kmemdup(ds_states_template, |
1191 | sizeof(ds_states_template), GFP_KERNEL); | |
5fc98610 DM |
1192 | if (!dp->ds_states) |
1193 | goto out_free_rcv_buf; | |
1194 | ||
5fc98610 DM |
1195 | dp->num_ds_states = ARRAY_SIZE(ds_states_template); |
1196 | ||
1197 | for (i = 0; i < dp->num_ds_states; i++) | |
1198 | dp->ds_states[i].handle = ((u64)i << 32); | |
1199 | ||
43fdf274 DM |
1200 | ds_cfg.tx_irq = vdev->tx_irq; |
1201 | ds_cfg.rx_irq = vdev->rx_irq; | |
e450992d | 1202 | |
43fdf274 | 1203 | lp = ldc_alloc(vdev->channel_id, &ds_cfg, dp); |
e450992d DM |
1204 | if (IS_ERR(lp)) { |
1205 | err = PTR_ERR(lp); | |
5fc98610 | 1206 | goto out_free_ds_states; |
e450992d DM |
1207 | } |
1208 | dp->lp = lp; | |
1209 | ||
133f09a1 | 1210 | err = ldc_bind(lp, "DS"); |
e450992d DM |
1211 | if (err) |
1212 | goto out_free_ldc; | |
1213 | ||
5fc98610 DM |
1214 | spin_lock_irq(&ds_lock); |
1215 | dp->next = ds_info_list; | |
1216 | ds_info_list = dp; | |
1217 | spin_unlock_irq(&ds_lock); | |
b3e13fbe | 1218 | |
e450992d DM |
1219 | return err; |
1220 | ||
1221 | out_free_ldc: | |
1222 | ldc_free(dp->lp); | |
1223 | ||
5fc98610 DM |
1224 | out_free_ds_states: |
1225 | kfree(dp->ds_states); | |
1226 | ||
e450992d DM |
1227 | out_free_rcv_buf: |
1228 | kfree(dp->rcv_buf); | |
1229 | ||
1230 | out_free_dp: | |
1231 | kfree(dp); | |
1232 | ||
1233 | out_err: | |
1234 | return err; | |
1235 | } | |
1236 | ||
1237 | static int ds_remove(struct vio_dev *vdev) | |
1238 | { | |
1239 | return 0; | |
1240 | } | |
1241 | ||
3628aa06 | 1242 | static const struct vio_device_id ds_match[] = { |
e450992d DM |
1243 | { |
1244 | .type = "domain-services-port", | |
1245 | }, | |
1246 | {}, | |
1247 | }; | |
1248 | ||
1249 | static struct vio_driver ds_driver = { | |
1250 | .id_table = ds_match, | |
1251 | .probe = ds_probe, | |
1252 | .remove = ds_remove, | |
cb52d897 | 1253 | .name = "ds", |
e450992d DM |
1254 | }; |
1255 | ||
1256 | static int __init ds_init(void) | |
1257 | { | |
ea5e7447 DM |
1258 | unsigned long hv_ret, major, minor; |
1259 | ||
c92761fd DM |
1260 | if (tlb_type == hypervisor) { |
1261 | hv_ret = sun4v_get_version(HV_GRP_REBOOT_DATA, &major, &minor); | |
1262 | if (hv_ret == HV_EOK) { | |
1263 | pr_info("SUN4V: Reboot data supported (maj=%lu,min=%lu).\n", | |
1264 | major, minor); | |
1265 | reboot_data_supported = 1; | |
1266 | } | |
ea5e7447 | 1267 | } |
778feeb4 | 1268 | kthread_run(ds_thread, NULL, "kldomd"); |
bd0e11ff | 1269 | |
e450992d DM |
1270 | return vio_register_driver(&ds_driver); |
1271 | } | |
1272 | ||
9e0daff3 | 1273 | fs_initcall(ds_init); |