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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e450992d DM |
2 | /* ds.c: Domain Services driver for Logical Domains |
3 | * | |
3d452e55 | 4 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
e450992d DM |
5 | */ |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/types.h> | |
e450992d DM |
10 | #include <linux/string.h> |
11 | #include <linux/slab.h> | |
12 | #include <linux/sched.h> | |
e6017571 | 13 | #include <linux/sched/clock.h> |
e450992d | 14 | #include <linux/delay.h> |
b3e13fbe | 15 | #include <linux/mutex.h> |
bd0e11ff | 16 | #include <linux/kthread.h> |
a3761780 | 17 | #include <linux/reboot.h> |
4f0234f4 | 18 | #include <linux/cpu.h> |
e450992d | 19 | |
ea5e7447 | 20 | #include <asm/hypervisor.h> |
e450992d DM |
21 | #include <asm/ldc.h> |
22 | #include <asm/vio.h> | |
43fdf274 | 23 | #include <asm/mdesc.h> |
4f0234f4 | 24 | #include <asm/head.h> |
e0204409 | 25 | #include <asm/irq.h> |
e450992d | 26 | |
ea5e7447 DM |
27 | #include "kernel.h" |
28 | ||
e450992d DM |
29 | #define DRV_MODULE_NAME "ds" |
30 | #define PFX DRV_MODULE_NAME ": " | |
31 | #define DRV_MODULE_VERSION "1.0" | |
32 | #define DRV_MODULE_RELDATE "Jul 11, 2007" | |
33 | ||
7c9503b8 | 34 | static char version[] = |
e450992d | 35 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
6a57a219 | 36 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); |
e450992d DM |
37 | MODULE_DESCRIPTION("Sun LDOM domain services driver"); |
38 | MODULE_LICENSE("GPL"); | |
39 | MODULE_VERSION(DRV_MODULE_VERSION); | |
40 | ||
41 | struct ds_msg_tag { | |
42 | __u32 type; | |
43 | #define DS_INIT_REQ 0x00 | |
44 | #define DS_INIT_ACK 0x01 | |
45 | #define DS_INIT_NACK 0x02 | |
46 | #define DS_REG_REQ 0x03 | |
47 | #define DS_REG_ACK 0x04 | |
48 | #define DS_REG_NACK 0x05 | |
49 | #define DS_UNREG_REQ 0x06 | |
50 | #define DS_UNREG_ACK 0x07 | |
51 | #define DS_UNREG_NACK 0x08 | |
52 | #define DS_DATA 0x09 | |
53 | #define DS_NACK 0x0a | |
54 | ||
55 | __u32 len; | |
56 | }; | |
57 | ||
58 | /* Result codes */ | |
59 | #define DS_OK 0x00 | |
60 | #define DS_REG_VER_NACK 0x01 | |
61 | #define DS_REG_DUP 0x02 | |
62 | #define DS_INV_HDL 0x03 | |
63 | #define DS_TYPE_UNKNOWN 0x04 | |
64 | ||
65 | struct ds_version { | |
66 | __u16 major; | |
67 | __u16 minor; | |
68 | }; | |
69 | ||
70 | struct ds_ver_req { | |
71 | struct ds_msg_tag tag; | |
72 | struct ds_version ver; | |
73 | }; | |
74 | ||
75 | struct ds_ver_ack { | |
76 | struct ds_msg_tag tag; | |
77 | __u16 minor; | |
78 | }; | |
79 | ||
80 | struct ds_ver_nack { | |
81 | struct ds_msg_tag tag; | |
82 | __u16 major; | |
83 | }; | |
84 | ||
85 | struct ds_reg_req { | |
86 | struct ds_msg_tag tag; | |
87 | __u64 handle; | |
88 | __u16 major; | |
89 | __u16 minor; | |
60da7d0b | 90 | char svc_id[]; |
e450992d DM |
91 | }; |
92 | ||
93 | struct ds_reg_ack { | |
94 | struct ds_msg_tag tag; | |
95 | __u64 handle; | |
96 | __u16 minor; | |
97 | }; | |
98 | ||
99 | struct ds_reg_nack { | |
100 | struct ds_msg_tag tag; | |
101 | __u64 handle; | |
102 | __u16 major; | |
103 | }; | |
104 | ||
105 | struct ds_unreg_req { | |
106 | struct ds_msg_tag tag; | |
107 | __u64 handle; | |
108 | }; | |
109 | ||
110 | struct ds_unreg_ack { | |
111 | struct ds_msg_tag tag; | |
112 | __u64 handle; | |
113 | }; | |
114 | ||
115 | struct ds_unreg_nack { | |
116 | struct ds_msg_tag tag; | |
117 | __u64 handle; | |
118 | }; | |
119 | ||
120 | struct ds_data { | |
121 | struct ds_msg_tag tag; | |
122 | __u64 handle; | |
123 | }; | |
124 | ||
125 | struct ds_data_nack { | |
126 | struct ds_msg_tag tag; | |
127 | __u64 handle; | |
128 | __u64 result; | |
129 | }; | |
130 | ||
5fc98610 | 131 | struct ds_info; |
e450992d DM |
132 | struct ds_cap_state { |
133 | __u64 handle; | |
134 | ||
5fc98610 | 135 | void (*data)(struct ds_info *dp, |
4f0234f4 | 136 | struct ds_cap_state *cp, |
e450992d DM |
137 | void *buf, int len); |
138 | ||
139 | const char *service_id; | |
140 | ||
141 | u8 state; | |
142 | #define CAP_STATE_UNKNOWN 0x00 | |
143 | #define CAP_STATE_REG_SENT 0x01 | |
144 | #define CAP_STATE_REGISTERED 0x02 | |
145 | }; | |
146 | ||
5fc98610 | 147 | static void md_update_data(struct ds_info *dp, struct ds_cap_state *cp, |
4f0234f4 | 148 | void *buf, int len); |
5fc98610 | 149 | static void domain_shutdown_data(struct ds_info *dp, |
4f0234f4 DM |
150 | struct ds_cap_state *cp, |
151 | void *buf, int len); | |
5fc98610 | 152 | static void domain_panic_data(struct ds_info *dp, |
4f0234f4 DM |
153 | struct ds_cap_state *cp, |
154 | void *buf, int len); | |
b14f5c10 | 155 | #ifdef CONFIG_HOTPLUG_CPU |
5fc98610 | 156 | static void dr_cpu_data(struct ds_info *dp, |
4f0234f4 DM |
157 | struct ds_cap_state *cp, |
158 | void *buf, int len); | |
b14f5c10 | 159 | #endif |
5fc98610 | 160 | static void ds_pri_data(struct ds_info *dp, |
4f0234f4 DM |
161 | struct ds_cap_state *cp, |
162 | void *buf, int len); | |
5fc98610 | 163 | static void ds_var_data(struct ds_info *dp, |
4f0234f4 DM |
164 | struct ds_cap_state *cp, |
165 | void *buf, int len); | |
166 | ||
908f5162 | 167 | static struct ds_cap_state ds_states_template[] = { |
4f0234f4 DM |
168 | { |
169 | .service_id = "md-update", | |
170 | .data = md_update_data, | |
171 | }, | |
172 | { | |
173 | .service_id = "domain-shutdown", | |
174 | .data = domain_shutdown_data, | |
175 | }, | |
176 | { | |
177 | .service_id = "domain-panic", | |
178 | .data = domain_panic_data, | |
179 | }, | |
b14f5c10 | 180 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 DM |
181 | { |
182 | .service_id = "dr-cpu", | |
183 | .data = dr_cpu_data, | |
184 | }, | |
b14f5c10 | 185 | #endif |
4f0234f4 DM |
186 | { |
187 | .service_id = "pri", | |
188 | .data = ds_pri_data, | |
189 | }, | |
190 | { | |
191 | .service_id = "var-config", | |
192 | .data = ds_var_data, | |
193 | }, | |
194 | { | |
195 | .service_id = "var-config-backup", | |
196 | .data = ds_var_data, | |
197 | }, | |
198 | }; | |
199 | ||
200 | static DEFINE_SPINLOCK(ds_lock); | |
201 | ||
202 | struct ds_info { | |
203 | struct ldc_channel *lp; | |
204 | u8 hs_state; | |
205 | #define DS_HS_START 0x01 | |
206 | #define DS_HS_DONE 0x02 | |
207 | ||
5fc98610 DM |
208 | u64 id; |
209 | ||
4f0234f4 DM |
210 | void *rcv_buf; |
211 | int rcv_buf_len; | |
5fc98610 DM |
212 | |
213 | struct ds_cap_state *ds_states; | |
214 | int num_ds_states; | |
215 | ||
216 | struct ds_info *next; | |
4f0234f4 DM |
217 | }; |
218 | ||
5fc98610 | 219 | static struct ds_info *ds_info_list; |
4f0234f4 | 220 | |
5fc98610 | 221 | static struct ds_cap_state *find_cap(struct ds_info *dp, u64 handle) |
4f0234f4 DM |
222 | { |
223 | unsigned int index = handle >> 32; | |
224 | ||
5fc98610 | 225 | if (index >= dp->num_ds_states) |
4f0234f4 | 226 | return NULL; |
5fc98610 | 227 | return &dp->ds_states[index]; |
4f0234f4 DM |
228 | } |
229 | ||
5fc98610 DM |
230 | static struct ds_cap_state *find_cap_by_string(struct ds_info *dp, |
231 | const char *name) | |
4f0234f4 DM |
232 | { |
233 | int i; | |
234 | ||
5fc98610 DM |
235 | for (i = 0; i < dp->num_ds_states; i++) { |
236 | if (strcmp(dp->ds_states[i].service_id, name)) | |
4f0234f4 DM |
237 | continue; |
238 | ||
5fc98610 | 239 | return &dp->ds_states[i]; |
4f0234f4 DM |
240 | } |
241 | return NULL; | |
242 | } | |
243 | ||
778feeb4 | 244 | static int __ds_send(struct ldc_channel *lp, void *data, int len) |
e450992d DM |
245 | { |
246 | int err, limit = 1000; | |
247 | ||
248 | err = -EINVAL; | |
249 | while (limit-- > 0) { | |
250 | err = ldc_write(lp, data, len); | |
251 | if (!err || (err != -EAGAIN)) | |
252 | break; | |
253 | udelay(1); | |
254 | } | |
255 | ||
256 | return err; | |
257 | } | |
258 | ||
778feeb4 DM |
259 | static int ds_send(struct ldc_channel *lp, void *data, int len) |
260 | { | |
261 | unsigned long flags; | |
262 | int err; | |
263 | ||
264 | spin_lock_irqsave(&ds_lock, flags); | |
265 | err = __ds_send(lp, data, len); | |
266 | spin_unlock_irqrestore(&ds_lock, flags); | |
267 | ||
268 | return err; | |
269 | } | |
270 | ||
e450992d DM |
271 | struct ds_md_update_req { |
272 | __u64 req_num; | |
273 | }; | |
274 | ||
275 | struct ds_md_update_res { | |
276 | __u64 req_num; | |
277 | __u32 result; | |
278 | }; | |
279 | ||
5fc98610 DM |
280 | static void md_update_data(struct ds_info *dp, |
281 | struct ds_cap_state *cp, | |
e450992d DM |
282 | void *buf, int len) |
283 | { | |
5fc98610 | 284 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
285 | struct ds_data *dpkt = buf; |
286 | struct ds_md_update_req *rp; | |
287 | struct { | |
288 | struct ds_data data; | |
289 | struct ds_md_update_res res; | |
290 | } pkt; | |
291 | ||
292 | rp = (struct ds_md_update_req *) (dpkt + 1); | |
293 | ||
90181136 | 294 | printk(KERN_INFO "ds-%llu: Machine description update.\n", dp->id); |
e450992d | 295 | |
778feeb4 DM |
296 | mdesc_update(); |
297 | ||
e450992d DM |
298 | memset(&pkt, 0, sizeof(pkt)); |
299 | pkt.data.tag.type = DS_DATA; | |
300 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 301 | pkt.data.handle = cp->handle; |
e450992d DM |
302 | pkt.res.req_num = rp->req_num; |
303 | pkt.res.result = DS_OK; | |
304 | ||
305 | ds_send(lp, &pkt, sizeof(pkt)); | |
306 | } | |
307 | ||
308 | struct ds_shutdown_req { | |
309 | __u64 req_num; | |
310 | __u32 ms_delay; | |
311 | }; | |
312 | ||
313 | struct ds_shutdown_res { | |
314 | __u64 req_num; | |
315 | __u32 result; | |
316 | char reason[1]; | |
317 | }; | |
318 | ||
5fc98610 DM |
319 | static void domain_shutdown_data(struct ds_info *dp, |
320 | struct ds_cap_state *cp, | |
e450992d DM |
321 | void *buf, int len) |
322 | { | |
5fc98610 | 323 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
324 | struct ds_data *dpkt = buf; |
325 | struct ds_shutdown_req *rp; | |
326 | struct { | |
327 | struct ds_data data; | |
328 | struct ds_shutdown_res res; | |
329 | } pkt; | |
330 | ||
331 | rp = (struct ds_shutdown_req *) (dpkt + 1); | |
332 | ||
90181136 | 333 | printk(KERN_ALERT "ds-%llu: Shutdown request from " |
5fc98610 | 334 | "LDOM manager received.\n", dp->id); |
e450992d DM |
335 | |
336 | memset(&pkt, 0, sizeof(pkt)); | |
337 | pkt.data.tag.type = DS_DATA; | |
338 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 339 | pkt.data.handle = cp->handle; |
e450992d DM |
340 | pkt.res.req_num = rp->req_num; |
341 | pkt.res.result = DS_OK; | |
342 | pkt.res.reason[0] = 0; | |
343 | ||
344 | ds_send(lp, &pkt, sizeof(pkt)); | |
345 | ||
a3761780 | 346 | orderly_poweroff(true); |
e450992d DM |
347 | } |
348 | ||
349 | struct ds_panic_req { | |
350 | __u64 req_num; | |
351 | }; | |
352 | ||
353 | struct ds_panic_res { | |
354 | __u64 req_num; | |
355 | __u32 result; | |
356 | char reason[1]; | |
357 | }; | |
358 | ||
5fc98610 DM |
359 | static void domain_panic_data(struct ds_info *dp, |
360 | struct ds_cap_state *cp, | |
e450992d DM |
361 | void *buf, int len) |
362 | { | |
5fc98610 | 363 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
364 | struct ds_data *dpkt = buf; |
365 | struct ds_panic_req *rp; | |
366 | struct { | |
367 | struct ds_data data; | |
368 | struct ds_panic_res res; | |
369 | } pkt; | |
370 | ||
371 | rp = (struct ds_panic_req *) (dpkt + 1); | |
372 | ||
90181136 | 373 | printk(KERN_ALERT "ds-%llu: Panic request from " |
5fc98610 | 374 | "LDOM manager received.\n", dp->id); |
e450992d DM |
375 | |
376 | memset(&pkt, 0, sizeof(pkt)); | |
377 | pkt.data.tag.type = DS_DATA; | |
378 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 379 | pkt.data.handle = cp->handle; |
e450992d DM |
380 | pkt.res.req_num = rp->req_num; |
381 | pkt.res.result = DS_OK; | |
382 | pkt.res.reason[0] = 0; | |
383 | ||
384 | ds_send(lp, &pkt, sizeof(pkt)); | |
385 | ||
386 | panic("PANIC requested by LDOM manager."); | |
387 | } | |
388 | ||
b14f5c10 | 389 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 | 390 | struct dr_cpu_tag { |
e450992d DM |
391 | __u64 req_num; |
392 | __u32 type; | |
4f0234f4 DM |
393 | #define DR_CPU_CONFIGURE 0x43 |
394 | #define DR_CPU_UNCONFIGURE 0x55 | |
395 | #define DR_CPU_FORCE_UNCONFIGURE 0x46 | |
396 | #define DR_CPU_STATUS 0x53 | |
e450992d DM |
397 | |
398 | /* Responses */ | |
4f0234f4 DM |
399 | #define DR_CPU_OK 0x6f |
400 | #define DR_CPU_ERROR 0x65 | |
e450992d DM |
401 | |
402 | __u32 num_records; | |
403 | }; | |
404 | ||
4f0234f4 DM |
405 | struct dr_cpu_resp_entry { |
406 | __u32 cpu; | |
407 | __u32 result; | |
408 | #define DR_CPU_RES_OK 0x00 | |
409 | #define DR_CPU_RES_FAILURE 0x01 | |
410 | #define DR_CPU_RES_BLOCKED 0x02 | |
411 | #define DR_CPU_RES_CPU_NOT_RESPONDING 0x03 | |
412 | #define DR_CPU_RES_NOT_IN_MD 0x04 | |
413 | ||
414 | __u32 stat; | |
415 | #define DR_CPU_STAT_NOT_PRESENT 0x00 | |
416 | #define DR_CPU_STAT_UNCONFIGURED 0x01 | |
417 | #define DR_CPU_STAT_CONFIGURED 0x02 | |
418 | ||
419 | __u32 str_off; | |
e450992d DM |
420 | }; |
421 | ||
5fc98610 DM |
422 | static void __dr_cpu_send_error(struct ds_info *dp, |
423 | struct ds_cap_state *cp, | |
424 | struct ds_data *data) | |
4f0234f4 DM |
425 | { |
426 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
4f0234f4 DM |
427 | struct { |
428 | struct ds_data data; | |
429 | struct dr_cpu_tag tag; | |
430 | } pkt; | |
431 | int msg_len; | |
432 | ||
433 | memset(&pkt, 0, sizeof(pkt)); | |
434 | pkt.data.tag.type = DS_DATA; | |
435 | pkt.data.handle = cp->handle; | |
436 | pkt.tag.req_num = tag->req_num; | |
437 | pkt.tag.type = DR_CPU_ERROR; | |
438 | pkt.tag.num_records = 0; | |
439 | ||
440 | msg_len = (sizeof(struct ds_data) + | |
441 | sizeof(struct dr_cpu_tag)); | |
442 | ||
443 | pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
444 | ||
778feeb4 | 445 | __ds_send(dp->lp, &pkt, msg_len); |
4f0234f4 DM |
446 | } |
447 | ||
5fc98610 DM |
448 | static void dr_cpu_send_error(struct ds_info *dp, |
449 | struct ds_cap_state *cp, | |
450 | struct ds_data *data) | |
4f0234f4 DM |
451 | { |
452 | unsigned long flags; | |
453 | ||
454 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 455 | __dr_cpu_send_error(dp, cp, data); |
4f0234f4 DM |
456 | spin_unlock_irqrestore(&ds_lock, flags); |
457 | } | |
458 | ||
459 | #define CPU_SENTINEL 0xffffffff | |
460 | ||
461 | static void purge_dups(u32 *list, u32 num_ents) | |
462 | { | |
463 | unsigned int i; | |
464 | ||
465 | for (i = 0; i < num_ents; i++) { | |
466 | u32 cpu = list[i]; | |
467 | unsigned int j; | |
468 | ||
469 | if (cpu == CPU_SENTINEL) | |
470 | continue; | |
471 | ||
472 | for (j = i + 1; j < num_ents; j++) { | |
473 | if (list[j] == cpu) | |
474 | list[j] = CPU_SENTINEL; | |
475 | } | |
476 | } | |
477 | } | |
478 | ||
479 | static int dr_cpu_size_response(int ncpus) | |
480 | { | |
481 | return (sizeof(struct ds_data) + | |
482 | sizeof(struct dr_cpu_tag) + | |
483 | (sizeof(struct dr_cpu_resp_entry) * ncpus)); | |
484 | } | |
485 | ||
486 | static void dr_cpu_init_response(struct ds_data *resp, u64 req_num, | |
487 | u64 handle, int resp_len, int ncpus, | |
488 | cpumask_t *mask, u32 default_stat) | |
489 | { | |
490 | struct dr_cpu_resp_entry *ent; | |
491 | struct dr_cpu_tag *tag; | |
492 | int i, cpu; | |
493 | ||
494 | tag = (struct dr_cpu_tag *) (resp + 1); | |
495 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
496 | ||
497 | resp->tag.type = DS_DATA; | |
498 | resp->tag.len = resp_len - sizeof(struct ds_msg_tag); | |
499 | resp->handle = handle; | |
500 | tag->req_num = req_num; | |
501 | tag->type = DR_CPU_OK; | |
502 | tag->num_records = ncpus; | |
503 | ||
504 | i = 0; | |
fb1fece5 | 505 | for_each_cpu(cpu, mask) { |
4f0234f4 DM |
506 | ent[i].cpu = cpu; |
507 | ent[i].result = DR_CPU_RES_OK; | |
508 | ent[i].stat = default_stat; | |
509 | i++; | |
510 | } | |
511 | BUG_ON(i != ncpus); | |
512 | } | |
513 | ||
514 | static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus, | |
515 | u32 res, u32 stat) | |
516 | { | |
517 | struct dr_cpu_resp_entry *ent; | |
518 | struct dr_cpu_tag *tag; | |
519 | int i; | |
520 | ||
521 | tag = (struct dr_cpu_tag *) (resp + 1); | |
522 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
523 | ||
524 | for (i = 0; i < ncpus; i++) { | |
525 | if (ent[i].cpu != cpu) | |
526 | continue; | |
527 | ent[i].result = res; | |
528 | ent[i].stat = stat; | |
529 | break; | |
530 | } | |
531 | } | |
532 | ||
2066aadd PG |
533 | static int dr_cpu_configure(struct ds_info *dp, struct ds_cap_state *cp, |
534 | u64 req_num, cpumask_t *mask) | |
4f0234f4 DM |
535 | { |
536 | struct ds_data *resp; | |
537 | int resp_len, ncpus, cpu; | |
538 | unsigned long flags; | |
539 | ||
fb1fece5 | 540 | ncpus = cpumask_weight(mask); |
4f0234f4 DM |
541 | resp_len = dr_cpu_size_response(ncpus); |
542 | resp = kzalloc(resp_len, GFP_KERNEL); | |
543 | if (!resp) | |
544 | return -ENOMEM; | |
545 | ||
546 | dr_cpu_init_response(resp, req_num, cp->handle, | |
547 | resp_len, ncpus, mask, | |
548 | DR_CPU_STAT_CONFIGURED); | |
549 | ||
b696fdc2 | 550 | mdesc_populate_present_mask(mask); |
a2094502 | 551 | mdesc_fill_in_cpu_data(mask); |
4f0234f4 | 552 | |
fb1fece5 | 553 | for_each_cpu(cpu, mask) { |
4f0234f4 DM |
554 | int err; |
555 | ||
90181136 | 556 | printk(KERN_INFO "ds-%llu: Starting cpu %d...\n", |
5fc98610 | 557 | dp->id, cpu); |
7f6707a2 | 558 | err = add_cpu(cpu); |
bd0e11ff | 559 | if (err) { |
9918cc2e DM |
560 | __u32 res = DR_CPU_RES_FAILURE; |
561 | __u32 stat = DR_CPU_STAT_UNCONFIGURED; | |
562 | ||
563 | if (!cpu_present(cpu)) { | |
564 | /* CPU not present in MD */ | |
565 | res = DR_CPU_RES_NOT_IN_MD; | |
566 | stat = DR_CPU_STAT_NOT_PRESENT; | |
567 | } else if (err == -ENODEV) { | |
568 | /* CPU did not call in successfully */ | |
569 | res = DR_CPU_RES_CPU_NOT_RESPONDING; | |
570 | } | |
571 | ||
90181136 | 572 | printk(KERN_INFO "ds-%llu: CPU startup failed err=%d\n", |
5fc98610 | 573 | dp->id, err); |
9918cc2e | 574 | dr_cpu_mark(resp, cpu, ncpus, res, stat); |
bd0e11ff | 575 | } |
4f0234f4 DM |
576 | } |
577 | ||
578 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 579 | __ds_send(dp->lp, resp, resp_len); |
4f0234f4 DM |
580 | spin_unlock_irqrestore(&ds_lock, flags); |
581 | ||
582 | kfree(resp); | |
583 | ||
e0204409 DM |
584 | /* Redistribute IRQs, taking into account the new cpus. */ |
585 | fixup_irqs(); | |
586 | ||
4f0234f4 DM |
587 | return 0; |
588 | } | |
589 | ||
5fc98610 DM |
590 | static int dr_cpu_unconfigure(struct ds_info *dp, |
591 | struct ds_cap_state *cp, | |
592 | u64 req_num, | |
4f0234f4 DM |
593 | cpumask_t *mask) |
594 | { | |
595 | struct ds_data *resp; | |
e0204409 DM |
596 | int resp_len, ncpus, cpu; |
597 | unsigned long flags; | |
4f0234f4 | 598 | |
fb1fece5 | 599 | ncpus = cpumask_weight(mask); |
4f0234f4 DM |
600 | resp_len = dr_cpu_size_response(ncpus); |
601 | resp = kzalloc(resp_len, GFP_KERNEL); | |
602 | if (!resp) | |
603 | return -ENOMEM; | |
604 | ||
605 | dr_cpu_init_response(resp, req_num, cp->handle, | |
606 | resp_len, ncpus, mask, | |
607 | DR_CPU_STAT_UNCONFIGURED); | |
608 | ||
fb1fece5 | 609 | for_each_cpu(cpu, mask) { |
e0204409 DM |
610 | int err; |
611 | ||
90181136 | 612 | printk(KERN_INFO "ds-%llu: Shutting down cpu %d...\n", |
5fc98610 | 613 | dp->id, cpu); |
7f6707a2 | 614 | err = remove_cpu(cpu); |
e0204409 DM |
615 | if (err) |
616 | dr_cpu_mark(resp, cpu, ncpus, | |
617 | DR_CPU_RES_FAILURE, | |
618 | DR_CPU_STAT_CONFIGURED); | |
619 | } | |
620 | ||
621 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 622 | __ds_send(dp->lp, resp, resp_len); |
e0204409 DM |
623 | spin_unlock_irqrestore(&ds_lock, flags); |
624 | ||
4f0234f4 DM |
625 | kfree(resp); |
626 | ||
e0204409 | 627 | return 0; |
4f0234f4 DM |
628 | } |
629 | ||
2066aadd PG |
630 | static void dr_cpu_data(struct ds_info *dp, struct ds_cap_state *cp, void *buf, |
631 | int len) | |
4f0234f4 | 632 | { |
778feeb4 DM |
633 | struct ds_data *data = buf; |
634 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
635 | u32 *cpu_list = (u32 *) (tag + 1); | |
636 | u64 req_num = tag->req_num; | |
4f0234f4 | 637 | cpumask_t mask; |
778feeb4 DM |
638 | unsigned int i; |
639 | int err; | |
4f0234f4 | 640 | |
778feeb4 DM |
641 | switch (tag->type) { |
642 | case DR_CPU_CONFIGURE: | |
643 | case DR_CPU_UNCONFIGURE: | |
644 | case DR_CPU_FORCE_UNCONFIGURE: | |
645 | break; | |
4f0234f4 | 646 | |
778feeb4 | 647 | default: |
5fc98610 | 648 | dr_cpu_send_error(dp, cp, data); |
778feeb4 | 649 | return; |
4f0234f4 | 650 | } |
4f0234f4 | 651 | |
778feeb4 | 652 | purge_dups(cpu_list, tag->num_records); |
bd0e11ff | 653 | |
fb1fece5 | 654 | cpumask_clear(&mask); |
778feeb4 DM |
655 | for (i = 0; i < tag->num_records; i++) { |
656 | if (cpu_list[i] == CPU_SENTINEL) | |
657 | continue; | |
bd0e11ff | 658 | |
e305cb8f | 659 | if (cpu_list[i] < nr_cpu_ids) |
fb1fece5 | 660 | cpumask_set_cpu(cpu_list[i], &mask); |
bd0e11ff DM |
661 | } |
662 | ||
778feeb4 | 663 | if (tag->type == DR_CPU_CONFIGURE) |
5fc98610 | 664 | err = dr_cpu_configure(dp, cp, req_num, &mask); |
778feeb4 | 665 | else |
5fc98610 | 666 | err = dr_cpu_unconfigure(dp, cp, req_num, &mask); |
e450992d | 667 | |
778feeb4 | 668 | if (err) |
5fc98610 | 669 | dr_cpu_send_error(dp, cp, data); |
e450992d | 670 | } |
778feeb4 | 671 | #endif /* CONFIG_HOTPLUG_CPU */ |
e450992d DM |
672 | |
673 | struct ds_pri_msg { | |
674 | __u64 req_num; | |
675 | __u64 type; | |
676 | #define DS_PRI_REQUEST 0x00 | |
677 | #define DS_PRI_DATA 0x01 | |
678 | #define DS_PRI_UPDATE 0x02 | |
679 | }; | |
680 | ||
5fc98610 DM |
681 | static void ds_pri_data(struct ds_info *dp, |
682 | struct ds_cap_state *cp, | |
e450992d DM |
683 | void *buf, int len) |
684 | { | |
685 | struct ds_data *dpkt = buf; | |
686 | struct ds_pri_msg *rp; | |
687 | ||
688 | rp = (struct ds_pri_msg *) (dpkt + 1); | |
689 | ||
90181136 | 690 | printk(KERN_INFO "ds-%llu: PRI REQ [%llx:%llx], len=%d\n", |
5fc98610 | 691 | dp->id, rp->req_num, rp->type, len); |
e450992d DM |
692 | } |
693 | ||
b3e13fbe DM |
694 | struct ds_var_hdr { |
695 | __u32 type; | |
696 | #define DS_VAR_SET_REQ 0x00 | |
697 | #define DS_VAR_DELETE_REQ 0x01 | |
698 | #define DS_VAR_SET_RESP 0x02 | |
699 | #define DS_VAR_DELETE_RESP 0x03 | |
700 | }; | |
701 | ||
702 | struct ds_var_set_msg { | |
703 | struct ds_var_hdr hdr; | |
60da7d0b | 704 | char name_and_value[]; |
b3e13fbe DM |
705 | }; |
706 | ||
707 | struct ds_var_delete_msg { | |
708 | struct ds_var_hdr hdr; | |
60da7d0b | 709 | char name[]; |
b3e13fbe DM |
710 | }; |
711 | ||
712 | struct ds_var_resp { | |
713 | struct ds_var_hdr hdr; | |
714 | __u32 result; | |
715 | #define DS_VAR_SUCCESS 0x00 | |
716 | #define DS_VAR_NO_SPACE 0x01 | |
717 | #define DS_VAR_INVALID_VAR 0x02 | |
718 | #define DS_VAR_INVALID_VAL 0x03 | |
719 | #define DS_VAR_NOT_PRESENT 0x04 | |
720 | }; | |
721 | ||
722 | static DEFINE_MUTEX(ds_var_mutex); | |
723 | static int ds_var_doorbell; | |
724 | static int ds_var_response; | |
725 | ||
5fc98610 DM |
726 | static void ds_var_data(struct ds_info *dp, |
727 | struct ds_cap_state *cp, | |
b3e13fbe DM |
728 | void *buf, int len) |
729 | { | |
730 | struct ds_data *dpkt = buf; | |
731 | struct ds_var_resp *rp; | |
732 | ||
733 | rp = (struct ds_var_resp *) (dpkt + 1); | |
734 | ||
735 | if (rp->hdr.type != DS_VAR_SET_RESP && | |
736 | rp->hdr.type != DS_VAR_DELETE_RESP) | |
737 | return; | |
738 | ||
739 | ds_var_response = rp->result; | |
740 | wmb(); | |
741 | ds_var_doorbell = 1; | |
742 | } | |
743 | ||
b3e13fbe DM |
744 | void ldom_set_var(const char *var, const char *value) |
745 | { | |
b3e13fbe | 746 | struct ds_cap_state *cp; |
5fc98610 DM |
747 | struct ds_info *dp; |
748 | unsigned long flags; | |
749 | ||
750 | spin_lock_irqsave(&ds_lock, flags); | |
751 | cp = NULL; | |
752 | for (dp = ds_info_list; dp; dp = dp->next) { | |
753 | struct ds_cap_state *tmp; | |
754 | ||
755 | tmp = find_cap_by_string(dp, "var-config"); | |
756 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
757 | cp = tmp; | |
758 | break; | |
759 | } | |
760 | } | |
761 | if (!cp) { | |
762 | for (dp = ds_info_list; dp; dp = dp->next) { | |
763 | struct ds_cap_state *tmp; | |
b3e13fbe | 764 | |
5fc98610 DM |
765 | tmp = find_cap_by_string(dp, "var-config-backup"); |
766 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
767 | cp = tmp; | |
768 | break; | |
769 | } | |
770 | } | |
771 | } | |
772 | spin_unlock_irqrestore(&ds_lock, flags); | |
b3e13fbe | 773 | |
5fc98610 | 774 | if (cp) { |
b3e13fbe DM |
775 | union { |
776 | struct { | |
777 | struct ds_data data; | |
778 | struct ds_var_set_msg msg; | |
779 | } header; | |
780 | char all[512]; | |
781 | } pkt; | |
b3e13fbe DM |
782 | char *base, *p; |
783 | int msg_len, loops; | |
784 | ||
f118e9ab CG |
785 | if (strlen(var) + strlen(value) + 2 > |
786 | sizeof(pkt) - sizeof(pkt.header)) { | |
787 | printk(KERN_ERR PFX | |
788 | "contents length: %zu, which more than max: %lu," | |
789 | "so could not set (%s) variable to (%s).\n", | |
790 | strlen(var) + strlen(value) + 2, | |
791 | sizeof(pkt) - sizeof(pkt.header), var, value); | |
792 | return; | |
793 | } | |
794 | ||
b3e13fbe DM |
795 | memset(&pkt, 0, sizeof(pkt)); |
796 | pkt.header.data.tag.type = DS_DATA; | |
797 | pkt.header.data.handle = cp->handle; | |
798 | pkt.header.msg.hdr.type = DS_VAR_SET_REQ; | |
799 | base = p = &pkt.header.msg.name_and_value[0]; | |
800 | strcpy(p, var); | |
801 | p += strlen(var) + 1; | |
802 | strcpy(p, value); | |
803 | p += strlen(value) + 1; | |
804 | ||
805 | msg_len = (sizeof(struct ds_data) + | |
4f0234f4 DM |
806 | sizeof(struct ds_var_set_msg) + |
807 | (p - base)); | |
b3e13fbe DM |
808 | msg_len = (msg_len + 3) & ~3; |
809 | pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
810 | ||
811 | mutex_lock(&ds_var_mutex); | |
812 | ||
813 | spin_lock_irqsave(&ds_lock, flags); | |
814 | ds_var_doorbell = 0; | |
815 | ds_var_response = -1; | |
816 | ||
778feeb4 | 817 | __ds_send(dp->lp, &pkt, msg_len); |
b3e13fbe DM |
818 | spin_unlock_irqrestore(&ds_lock, flags); |
819 | ||
820 | loops = 1000; | |
821 | while (ds_var_doorbell == 0) { | |
822 | if (loops-- < 0) | |
823 | break; | |
824 | barrier(); | |
825 | udelay(100); | |
826 | } | |
827 | ||
828 | mutex_unlock(&ds_var_mutex); | |
829 | ||
830 | if (ds_var_doorbell == 0 || | |
831 | ds_var_response != DS_VAR_SUCCESS) | |
90181136 | 832 | printk(KERN_ERR "ds-%llu: var-config [%s:%s] " |
b3e13fbe | 833 | "failed, response(%d).\n", |
5fc98610 | 834 | dp->id, var, value, |
b3e13fbe DM |
835 | ds_var_response); |
836 | } else { | |
837 | printk(KERN_ERR PFX "var-config not registered so " | |
838 | "could not set (%s) variable to (%s).\n", | |
839 | var, value); | |
840 | } | |
841 | } | |
842 | ||
ea5e7447 DM |
843 | static char full_boot_str[256] __attribute__((aligned(32))); |
844 | static int reboot_data_supported; | |
845 | ||
b3e13fbe DM |
846 | void ldom_reboot(const char *boot_command) |
847 | { | |
848 | /* Don't bother with any of this if the boot_command | |
849 | * is empty. | |
850 | */ | |
851 | if (boot_command && strlen(boot_command)) { | |
ea5e7447 | 852 | unsigned long len; |
b3e13fbe | 853 | |
20928bd3 KC |
854 | snprintf(full_boot_str, sizeof(full_boot_str), "boot %s", |
855 | boot_command); | |
ea5e7447 | 856 | len = strlen(full_boot_str); |
b3e13fbe | 857 | |
ea5e7447 DM |
858 | if (reboot_data_supported) { |
859 | unsigned long ra = kimage_addr_to_ra(full_boot_str); | |
860 | unsigned long hv_ret; | |
861 | ||
862 | hv_ret = sun4v_reboot_data_set(ra, len); | |
863 | if (hv_ret != HV_EOK) | |
864 | pr_err("SUN4V: Unable to set reboot data " | |
865 | "hv_ret=%lu\n", hv_ret); | |
866 | } else { | |
867 | ldom_set_var("reboot-command", full_boot_str); | |
868 | } | |
b3e13fbe DM |
869 | } |
870 | sun4v_mach_sir(); | |
871 | } | |
872 | ||
4f0234f4 DM |
873 | void ldom_power_off(void) |
874 | { | |
875 | sun4v_mach_exit(0); | |
876 | } | |
877 | ||
e450992d DM |
878 | static void ds_conn_reset(struct ds_info *dp) |
879 | { | |
d75f773c | 880 | printk(KERN_ERR "ds-%llu: ds_conn_reset() from %ps\n", |
5fc98610 | 881 | dp->id, __builtin_return_address(0)); |
e450992d DM |
882 | } |
883 | ||
884 | static int register_services(struct ds_info *dp) | |
885 | { | |
886 | struct ldc_channel *lp = dp->lp; | |
887 | int i; | |
888 | ||
5fc98610 | 889 | for (i = 0; i < dp->num_ds_states; i++) { |
e450992d DM |
890 | struct { |
891 | struct ds_reg_req req; | |
892 | u8 id_buf[256]; | |
893 | } pbuf; | |
5fc98610 | 894 | struct ds_cap_state *cp = &dp->ds_states[i]; |
e450992d DM |
895 | int err, msg_len; |
896 | u64 new_count; | |
897 | ||
898 | if (cp->state == CAP_STATE_REGISTERED) | |
899 | continue; | |
900 | ||
901 | new_count = sched_clock() & 0xffffffff; | |
902 | cp->handle = ((u64) i << 32) | new_count; | |
903 | ||
904 | msg_len = (sizeof(struct ds_reg_req) + | |
905 | strlen(cp->service_id)); | |
906 | ||
907 | memset(&pbuf, 0, sizeof(pbuf)); | |
908 | pbuf.req.tag.type = DS_REG_REQ; | |
909 | pbuf.req.tag.len = (msg_len - sizeof(struct ds_msg_tag)); | |
910 | pbuf.req.handle = cp->handle; | |
911 | pbuf.req.major = 1; | |
912 | pbuf.req.minor = 0; | |
0fde7ad7 | 913 | strcpy(pbuf.id_buf, cp->service_id); |
e450992d | 914 | |
778feeb4 | 915 | err = __ds_send(lp, &pbuf, msg_len); |
e450992d DM |
916 | if (err > 0) |
917 | cp->state = CAP_STATE_REG_SENT; | |
918 | } | |
919 | return 0; | |
920 | } | |
921 | ||
922 | static int ds_handshake(struct ds_info *dp, struct ds_msg_tag *pkt) | |
923 | { | |
924 | ||
925 | if (dp->hs_state == DS_HS_START) { | |
926 | if (pkt->type != DS_INIT_ACK) | |
927 | goto conn_reset; | |
928 | ||
929 | dp->hs_state = DS_HS_DONE; | |
930 | ||
931 | return register_services(dp); | |
932 | } | |
933 | ||
934 | if (dp->hs_state != DS_HS_DONE) | |
935 | goto conn_reset; | |
936 | ||
937 | if (pkt->type == DS_REG_ACK) { | |
938 | struct ds_reg_ack *ap = (struct ds_reg_ack *) pkt; | |
5fc98610 | 939 | struct ds_cap_state *cp = find_cap(dp, ap->handle); |
e450992d DM |
940 | |
941 | if (!cp) { | |
90181136 SR |
942 | printk(KERN_ERR "ds-%llu: REG ACK for unknown " |
943 | "handle %llx\n", dp->id, ap->handle); | |
e450992d DM |
944 | return 0; |
945 | } | |
90181136 | 946 | printk(KERN_INFO "ds-%llu: Registered %s service.\n", |
5fc98610 | 947 | dp->id, cp->service_id); |
e450992d DM |
948 | cp->state = CAP_STATE_REGISTERED; |
949 | } else if (pkt->type == DS_REG_NACK) { | |
950 | struct ds_reg_nack *np = (struct ds_reg_nack *) pkt; | |
5fc98610 | 951 | struct ds_cap_state *cp = find_cap(dp, np->handle); |
e450992d DM |
952 | |
953 | if (!cp) { | |
90181136 SR |
954 | printk(KERN_ERR "ds-%llu: REG NACK for " |
955 | "unknown handle %llx\n", | |
5fc98610 | 956 | dp->id, np->handle); |
e450992d DM |
957 | return 0; |
958 | } | |
e450992d DM |
959 | cp->state = CAP_STATE_UNKNOWN; |
960 | } | |
961 | ||
962 | return 0; | |
963 | ||
964 | conn_reset: | |
965 | ds_conn_reset(dp); | |
966 | return -ECONNRESET; | |
967 | } | |
968 | ||
778feeb4 DM |
969 | static void __send_ds_nack(struct ds_info *dp, u64 handle) |
970 | { | |
971 | struct ds_data_nack nack = { | |
972 | .tag = { | |
973 | .type = DS_NACK, | |
974 | .len = (sizeof(struct ds_data_nack) - | |
975 | sizeof(struct ds_msg_tag)), | |
976 | }, | |
977 | .handle = handle, | |
978 | .result = DS_INV_HDL, | |
979 | }; | |
980 | ||
981 | __ds_send(dp->lp, &nack, sizeof(nack)); | |
982 | } | |
983 | ||
984 | static LIST_HEAD(ds_work_list); | |
985 | static DECLARE_WAIT_QUEUE_HEAD(ds_wait); | |
986 | ||
987 | struct ds_queue_entry { | |
988 | struct list_head list; | |
5fc98610 | 989 | struct ds_info *dp; |
778feeb4 DM |
990 | int req_len; |
991 | int __pad; | |
60da7d0b | 992 | u64 req[]; |
778feeb4 DM |
993 | }; |
994 | ||
995 | static void process_ds_work(void) | |
996 | { | |
997 | struct ds_queue_entry *qp, *tmp; | |
778feeb4 DM |
998 | unsigned long flags; |
999 | LIST_HEAD(todo); | |
1000 | ||
1001 | spin_lock_irqsave(&ds_lock, flags); | |
1f17131b | 1002 | list_splice_init(&ds_work_list, &todo); |
778feeb4 DM |
1003 | spin_unlock_irqrestore(&ds_lock, flags); |
1004 | ||
778feeb4 DM |
1005 | list_for_each_entry_safe(qp, tmp, &todo, list) { |
1006 | struct ds_data *dpkt = (struct ds_data *) qp->req; | |
5fc98610 DM |
1007 | struct ds_info *dp = qp->dp; |
1008 | struct ds_cap_state *cp = find_cap(dp, dpkt->handle); | |
778feeb4 DM |
1009 | int req_len = qp->req_len; |
1010 | ||
1011 | if (!cp) { | |
90181136 SR |
1012 | printk(KERN_ERR "ds-%llu: Data for unknown " |
1013 | "handle %llu\n", | |
5fc98610 | 1014 | dp->id, dpkt->handle); |
778feeb4 DM |
1015 | |
1016 | spin_lock_irqsave(&ds_lock, flags); | |
1017 | __send_ds_nack(dp, dpkt->handle); | |
1018 | spin_unlock_irqrestore(&ds_lock, flags); | |
1019 | } else { | |
5fc98610 | 1020 | cp->data(dp, cp, dpkt, req_len); |
778feeb4 DM |
1021 | } |
1022 | ||
1023 | list_del(&qp->list); | |
1024 | kfree(qp); | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | static int ds_thread(void *__unused) | |
1029 | { | |
1030 | DEFINE_WAIT(wait); | |
1031 | ||
1032 | while (1) { | |
1033 | prepare_to_wait(&ds_wait, &wait, TASK_INTERRUPTIBLE); | |
1034 | if (list_empty(&ds_work_list)) | |
1035 | schedule(); | |
1036 | finish_wait(&ds_wait, &wait); | |
1037 | ||
1038 | if (kthread_should_stop()) | |
1039 | break; | |
1040 | ||
1041 | process_ds_work(); | |
1042 | } | |
1043 | ||
1044 | return 0; | |
1045 | } | |
1046 | ||
e450992d DM |
1047 | static int ds_data(struct ds_info *dp, struct ds_msg_tag *pkt, int len) |
1048 | { | |
1049 | struct ds_data *dpkt = (struct ds_data *) pkt; | |
778feeb4 DM |
1050 | struct ds_queue_entry *qp; |
1051 | ||
1052 | qp = kmalloc(sizeof(struct ds_queue_entry) + len, GFP_ATOMIC); | |
1053 | if (!qp) { | |
1054 | __send_ds_nack(dp, dpkt->handle); | |
e450992d | 1055 | } else { |
5fc98610 | 1056 | qp->dp = dp; |
778feeb4 DM |
1057 | memcpy(&qp->req, pkt, len); |
1058 | list_add_tail(&qp->list, &ds_work_list); | |
1059 | wake_up(&ds_wait); | |
e450992d DM |
1060 | } |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | static void ds_up(struct ds_info *dp) | |
1065 | { | |
1066 | struct ldc_channel *lp = dp->lp; | |
1067 | struct ds_ver_req req; | |
1068 | int err; | |
1069 | ||
1070 | req.tag.type = DS_INIT_REQ; | |
1071 | req.tag.len = sizeof(req) - sizeof(struct ds_msg_tag); | |
1072 | req.ver.major = 1; | |
1073 | req.ver.minor = 0; | |
1074 | ||
778feeb4 | 1075 | err = __ds_send(lp, &req, sizeof(req)); |
e450992d DM |
1076 | if (err > 0) |
1077 | dp->hs_state = DS_HS_START; | |
1078 | } | |
1079 | ||
8a2950cc DM |
1080 | static void ds_reset(struct ds_info *dp) |
1081 | { | |
1082 | int i; | |
1083 | ||
1084 | dp->hs_state = 0; | |
1085 | ||
5fc98610 DM |
1086 | for (i = 0; i < dp->num_ds_states; i++) { |
1087 | struct ds_cap_state *cp = &dp->ds_states[i]; | |
8a2950cc DM |
1088 | |
1089 | cp->state = CAP_STATE_UNKNOWN; | |
1090 | } | |
1091 | } | |
1092 | ||
e450992d DM |
1093 | static void ds_event(void *arg, int event) |
1094 | { | |
1095 | struct ds_info *dp = arg; | |
1096 | struct ldc_channel *lp = dp->lp; | |
1097 | unsigned long flags; | |
1098 | int err; | |
1099 | ||
1100 | spin_lock_irqsave(&ds_lock, flags); | |
1101 | ||
1102 | if (event == LDC_EVENT_UP) { | |
1103 | ds_up(dp); | |
1104 | spin_unlock_irqrestore(&ds_lock, flags); | |
1105 | return; | |
1106 | } | |
1107 | ||
8a2950cc DM |
1108 | if (event == LDC_EVENT_RESET) { |
1109 | ds_reset(dp); | |
1110 | spin_unlock_irqrestore(&ds_lock, flags); | |
1111 | return; | |
1112 | } | |
1113 | ||
e450992d | 1114 | if (event != LDC_EVENT_DATA_READY) { |
90181136 | 1115 | printk(KERN_WARNING "ds-%llu: Unexpected LDC event %d\n", |
5fc98610 | 1116 | dp->id, event); |
e450992d DM |
1117 | spin_unlock_irqrestore(&ds_lock, flags); |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | err = 0; | |
1122 | while (1) { | |
1123 | struct ds_msg_tag *tag; | |
1124 | ||
1125 | err = ldc_read(lp, dp->rcv_buf, sizeof(*tag)); | |
1126 | ||
1127 | if (unlikely(err < 0)) { | |
1128 | if (err == -ECONNRESET) | |
1129 | ds_conn_reset(dp); | |
1130 | break; | |
1131 | } | |
1132 | if (err == 0) | |
1133 | break; | |
1134 | ||
1135 | tag = dp->rcv_buf; | |
1136 | err = ldc_read(lp, tag + 1, tag->len); | |
1137 | ||
1138 | if (unlikely(err < 0)) { | |
1139 | if (err == -ECONNRESET) | |
1140 | ds_conn_reset(dp); | |
1141 | break; | |
1142 | } | |
1143 | if (err < tag->len) | |
1144 | break; | |
1145 | ||
1146 | if (tag->type < DS_DATA) | |
1147 | err = ds_handshake(dp, dp->rcv_buf); | |
1148 | else | |
1149 | err = ds_data(dp, dp->rcv_buf, | |
1150 | sizeof(*tag) + err); | |
1151 | if (err == -ECONNRESET) | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | spin_unlock_irqrestore(&ds_lock, flags); | |
1156 | } | |
1157 | ||
7c9503b8 | 1158 | static int ds_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
e450992d DM |
1159 | { |
1160 | static int ds_version_printed; | |
e450992d DM |
1161 | struct ldc_channel_config ds_cfg = { |
1162 | .event = ds_event, | |
1163 | .mtu = 4096, | |
1164 | .mode = LDC_MODE_STREAM, | |
1165 | }; | |
5fc98610 | 1166 | struct mdesc_handle *hp; |
e450992d DM |
1167 | struct ldc_channel *lp; |
1168 | struct ds_info *dp; | |
5fc98610 DM |
1169 | const u64 *val; |
1170 | int err, i; | |
e450992d DM |
1171 | |
1172 | if (ds_version_printed++ == 0) | |
1173 | printk(KERN_INFO "%s", version); | |
1174 | ||
e450992d DM |
1175 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
1176 | err = -ENOMEM; | |
1177 | if (!dp) | |
1178 | goto out_err; | |
1179 | ||
5fc98610 DM |
1180 | hp = mdesc_grab(); |
1181 | val = mdesc_get_property(hp, vdev->mp, "id", NULL); | |
1182 | if (val) | |
1183 | dp->id = *val; | |
1184 | mdesc_release(hp); | |
1185 | ||
e450992d DM |
1186 | dp->rcv_buf = kzalloc(4096, GFP_KERNEL); |
1187 | if (!dp->rcv_buf) | |
1188 | goto out_free_dp; | |
1189 | ||
1190 | dp->rcv_buf_len = 4096; | |
1191 | ||
f0a4cf31 TM |
1192 | dp->ds_states = kmemdup(ds_states_template, |
1193 | sizeof(ds_states_template), GFP_KERNEL); | |
5fc98610 DM |
1194 | if (!dp->ds_states) |
1195 | goto out_free_rcv_buf; | |
1196 | ||
5fc98610 DM |
1197 | dp->num_ds_states = ARRAY_SIZE(ds_states_template); |
1198 | ||
1199 | for (i = 0; i < dp->num_ds_states; i++) | |
1200 | dp->ds_states[i].handle = ((u64)i << 32); | |
1201 | ||
43fdf274 DM |
1202 | ds_cfg.tx_irq = vdev->tx_irq; |
1203 | ds_cfg.rx_irq = vdev->rx_irq; | |
e450992d | 1204 | |
c21c4ab0 | 1205 | lp = ldc_alloc(vdev->channel_id, &ds_cfg, dp, "DS"); |
e450992d DM |
1206 | if (IS_ERR(lp)) { |
1207 | err = PTR_ERR(lp); | |
5fc98610 | 1208 | goto out_free_ds_states; |
e450992d DM |
1209 | } |
1210 | dp->lp = lp; | |
1211 | ||
c21c4ab0 | 1212 | err = ldc_bind(lp); |
e450992d DM |
1213 | if (err) |
1214 | goto out_free_ldc; | |
1215 | ||
5fc98610 DM |
1216 | spin_lock_irq(&ds_lock); |
1217 | dp->next = ds_info_list; | |
1218 | ds_info_list = dp; | |
1219 | spin_unlock_irq(&ds_lock); | |
b3e13fbe | 1220 | |
e450992d DM |
1221 | return err; |
1222 | ||
1223 | out_free_ldc: | |
1224 | ldc_free(dp->lp); | |
1225 | ||
5fc98610 DM |
1226 | out_free_ds_states: |
1227 | kfree(dp->ds_states); | |
1228 | ||
e450992d DM |
1229 | out_free_rcv_buf: |
1230 | kfree(dp->rcv_buf); | |
1231 | ||
1232 | out_free_dp: | |
1233 | kfree(dp); | |
1234 | ||
1235 | out_err: | |
1236 | return err; | |
1237 | } | |
1238 | ||
3628aa06 | 1239 | static const struct vio_device_id ds_match[] = { |
e450992d DM |
1240 | { |
1241 | .type = "domain-services-port", | |
1242 | }, | |
1243 | {}, | |
1244 | }; | |
1245 | ||
1246 | static struct vio_driver ds_driver = { | |
1247 | .id_table = ds_match, | |
1248 | .probe = ds_probe, | |
cb52d897 | 1249 | .name = "ds", |
e450992d DM |
1250 | }; |
1251 | ||
1252 | static int __init ds_init(void) | |
1253 | { | |
ea5e7447 DM |
1254 | unsigned long hv_ret, major, minor; |
1255 | ||
c92761fd DM |
1256 | if (tlb_type == hypervisor) { |
1257 | hv_ret = sun4v_get_version(HV_GRP_REBOOT_DATA, &major, &minor); | |
1258 | if (hv_ret == HV_EOK) { | |
1259 | pr_info("SUN4V: Reboot data supported (maj=%lu,min=%lu).\n", | |
1260 | major, minor); | |
1261 | reboot_data_supported = 1; | |
1262 | } | |
ea5e7447 | 1263 | } |
778feeb4 | 1264 | kthread_run(ds_thread, NULL, "kldomd"); |
bd0e11ff | 1265 | |
e450992d DM |
1266 | return vio_register_driver(&ds_driver); |
1267 | } | |
1268 | ||
9e0daff3 | 1269 | fs_initcall(ds_init); |