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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 DM |
17 | |
18 | #include <asm/ldc.h> | |
19 | #include <asm/vio.h> | |
43fdf274 | 20 | #include <asm/mdesc.h> |
4f0234f4 | 21 | #include <asm/head.h> |
e0204409 | 22 | #include <asm/irq.h> |
e450992d DM |
23 | |
24 | #define DRV_MODULE_NAME "ds" | |
25 | #define PFX DRV_MODULE_NAME ": " | |
26 | #define DRV_MODULE_VERSION "1.0" | |
27 | #define DRV_MODULE_RELDATE "Jul 11, 2007" | |
28 | ||
29 | static char version[] __devinitdata = | |
30 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; | |
31 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
32 | MODULE_DESCRIPTION("Sun LDOM domain services driver"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | MODULE_VERSION(DRV_MODULE_VERSION); | |
35 | ||
36 | struct ds_msg_tag { | |
37 | __u32 type; | |
38 | #define DS_INIT_REQ 0x00 | |
39 | #define DS_INIT_ACK 0x01 | |
40 | #define DS_INIT_NACK 0x02 | |
41 | #define DS_REG_REQ 0x03 | |
42 | #define DS_REG_ACK 0x04 | |
43 | #define DS_REG_NACK 0x05 | |
44 | #define DS_UNREG_REQ 0x06 | |
45 | #define DS_UNREG_ACK 0x07 | |
46 | #define DS_UNREG_NACK 0x08 | |
47 | #define DS_DATA 0x09 | |
48 | #define DS_NACK 0x0a | |
49 | ||
50 | __u32 len; | |
51 | }; | |
52 | ||
53 | /* Result codes */ | |
54 | #define DS_OK 0x00 | |
55 | #define DS_REG_VER_NACK 0x01 | |
56 | #define DS_REG_DUP 0x02 | |
57 | #define DS_INV_HDL 0x03 | |
58 | #define DS_TYPE_UNKNOWN 0x04 | |
59 | ||
60 | struct ds_version { | |
61 | __u16 major; | |
62 | __u16 minor; | |
63 | }; | |
64 | ||
65 | struct ds_ver_req { | |
66 | struct ds_msg_tag tag; | |
67 | struct ds_version ver; | |
68 | }; | |
69 | ||
70 | struct ds_ver_ack { | |
71 | struct ds_msg_tag tag; | |
72 | __u16 minor; | |
73 | }; | |
74 | ||
75 | struct ds_ver_nack { | |
76 | struct ds_msg_tag tag; | |
77 | __u16 major; | |
78 | }; | |
79 | ||
80 | struct ds_reg_req { | |
81 | struct ds_msg_tag tag; | |
82 | __u64 handle; | |
83 | __u16 major; | |
84 | __u16 minor; | |
85 | char svc_id[0]; | |
86 | }; | |
87 | ||
88 | struct ds_reg_ack { | |
89 | struct ds_msg_tag tag; | |
90 | __u64 handle; | |
91 | __u16 minor; | |
92 | }; | |
93 | ||
94 | struct ds_reg_nack { | |
95 | struct ds_msg_tag tag; | |
96 | __u64 handle; | |
97 | __u16 major; | |
98 | }; | |
99 | ||
100 | struct ds_unreg_req { | |
101 | struct ds_msg_tag tag; | |
102 | __u64 handle; | |
103 | }; | |
104 | ||
105 | struct ds_unreg_ack { | |
106 | struct ds_msg_tag tag; | |
107 | __u64 handle; | |
108 | }; | |
109 | ||
110 | struct ds_unreg_nack { | |
111 | struct ds_msg_tag tag; | |
112 | __u64 handle; | |
113 | }; | |
114 | ||
115 | struct ds_data { | |
116 | struct ds_msg_tag tag; | |
117 | __u64 handle; | |
118 | }; | |
119 | ||
120 | struct ds_data_nack { | |
121 | struct ds_msg_tag tag; | |
122 | __u64 handle; | |
123 | __u64 result; | |
124 | }; | |
125 | ||
5fc98610 | 126 | struct ds_info; |
e450992d DM |
127 | struct ds_cap_state { |
128 | __u64 handle; | |
129 | ||
5fc98610 | 130 | void (*data)(struct ds_info *dp, |
4f0234f4 | 131 | struct ds_cap_state *cp, |
e450992d DM |
132 | void *buf, int len); |
133 | ||
134 | const char *service_id; | |
135 | ||
136 | u8 state; | |
137 | #define CAP_STATE_UNKNOWN 0x00 | |
138 | #define CAP_STATE_REG_SENT 0x01 | |
139 | #define CAP_STATE_REGISTERED 0x02 | |
140 | }; | |
141 | ||
5fc98610 | 142 | static void md_update_data(struct ds_info *dp, struct ds_cap_state *cp, |
4f0234f4 | 143 | void *buf, int len); |
5fc98610 | 144 | static void domain_shutdown_data(struct ds_info *dp, |
4f0234f4 DM |
145 | struct ds_cap_state *cp, |
146 | void *buf, int len); | |
5fc98610 | 147 | static void domain_panic_data(struct ds_info *dp, |
4f0234f4 DM |
148 | struct ds_cap_state *cp, |
149 | void *buf, int len); | |
b14f5c10 | 150 | #ifdef CONFIG_HOTPLUG_CPU |
5fc98610 | 151 | static void dr_cpu_data(struct ds_info *dp, |
4f0234f4 DM |
152 | struct ds_cap_state *cp, |
153 | void *buf, int len); | |
b14f5c10 | 154 | #endif |
5fc98610 | 155 | static void ds_pri_data(struct ds_info *dp, |
4f0234f4 DM |
156 | struct ds_cap_state *cp, |
157 | void *buf, int len); | |
5fc98610 | 158 | static void ds_var_data(struct ds_info *dp, |
4f0234f4 DM |
159 | struct ds_cap_state *cp, |
160 | void *buf, int len); | |
161 | ||
908f5162 | 162 | static struct ds_cap_state ds_states_template[] = { |
4f0234f4 DM |
163 | { |
164 | .service_id = "md-update", | |
165 | .data = md_update_data, | |
166 | }, | |
167 | { | |
168 | .service_id = "domain-shutdown", | |
169 | .data = domain_shutdown_data, | |
170 | }, | |
171 | { | |
172 | .service_id = "domain-panic", | |
173 | .data = domain_panic_data, | |
174 | }, | |
b14f5c10 | 175 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 DM |
176 | { |
177 | .service_id = "dr-cpu", | |
178 | .data = dr_cpu_data, | |
179 | }, | |
b14f5c10 | 180 | #endif |
4f0234f4 DM |
181 | { |
182 | .service_id = "pri", | |
183 | .data = ds_pri_data, | |
184 | }, | |
185 | { | |
186 | .service_id = "var-config", | |
187 | .data = ds_var_data, | |
188 | }, | |
189 | { | |
190 | .service_id = "var-config-backup", | |
191 | .data = ds_var_data, | |
192 | }, | |
193 | }; | |
194 | ||
195 | static DEFINE_SPINLOCK(ds_lock); | |
196 | ||
197 | struct ds_info { | |
198 | struct ldc_channel *lp; | |
199 | u8 hs_state; | |
200 | #define DS_HS_START 0x01 | |
201 | #define DS_HS_DONE 0x02 | |
202 | ||
5fc98610 DM |
203 | u64 id; |
204 | ||
4f0234f4 DM |
205 | void *rcv_buf; |
206 | int rcv_buf_len; | |
5fc98610 DM |
207 | |
208 | struct ds_cap_state *ds_states; | |
209 | int num_ds_states; | |
210 | ||
211 | struct ds_info *next; | |
4f0234f4 DM |
212 | }; |
213 | ||
5fc98610 | 214 | static struct ds_info *ds_info_list; |
4f0234f4 | 215 | |
5fc98610 | 216 | static struct ds_cap_state *find_cap(struct ds_info *dp, u64 handle) |
4f0234f4 DM |
217 | { |
218 | unsigned int index = handle >> 32; | |
219 | ||
5fc98610 | 220 | if (index >= dp->num_ds_states) |
4f0234f4 | 221 | return NULL; |
5fc98610 | 222 | return &dp->ds_states[index]; |
4f0234f4 DM |
223 | } |
224 | ||
5fc98610 DM |
225 | static struct ds_cap_state *find_cap_by_string(struct ds_info *dp, |
226 | const char *name) | |
4f0234f4 DM |
227 | { |
228 | int i; | |
229 | ||
5fc98610 DM |
230 | for (i = 0; i < dp->num_ds_states; i++) { |
231 | if (strcmp(dp->ds_states[i].service_id, name)) | |
4f0234f4 DM |
232 | continue; |
233 | ||
5fc98610 | 234 | return &dp->ds_states[i]; |
4f0234f4 DM |
235 | } |
236 | return NULL; | |
237 | } | |
238 | ||
778feeb4 | 239 | static int __ds_send(struct ldc_channel *lp, void *data, int len) |
e450992d DM |
240 | { |
241 | int err, limit = 1000; | |
242 | ||
243 | err = -EINVAL; | |
244 | while (limit-- > 0) { | |
245 | err = ldc_write(lp, data, len); | |
246 | if (!err || (err != -EAGAIN)) | |
247 | break; | |
248 | udelay(1); | |
249 | } | |
250 | ||
251 | return err; | |
252 | } | |
253 | ||
778feeb4 DM |
254 | static int ds_send(struct ldc_channel *lp, void *data, int len) |
255 | { | |
256 | unsigned long flags; | |
257 | int err; | |
258 | ||
259 | spin_lock_irqsave(&ds_lock, flags); | |
260 | err = __ds_send(lp, data, len); | |
261 | spin_unlock_irqrestore(&ds_lock, flags); | |
262 | ||
263 | return err; | |
264 | } | |
265 | ||
e450992d DM |
266 | struct ds_md_update_req { |
267 | __u64 req_num; | |
268 | }; | |
269 | ||
270 | struct ds_md_update_res { | |
271 | __u64 req_num; | |
272 | __u32 result; | |
273 | }; | |
274 | ||
5fc98610 DM |
275 | static void md_update_data(struct ds_info *dp, |
276 | struct ds_cap_state *cp, | |
e450992d DM |
277 | void *buf, int len) |
278 | { | |
5fc98610 | 279 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
280 | struct ds_data *dpkt = buf; |
281 | struct ds_md_update_req *rp; | |
282 | struct { | |
283 | struct ds_data data; | |
284 | struct ds_md_update_res res; | |
285 | } pkt; | |
286 | ||
287 | rp = (struct ds_md_update_req *) (dpkt + 1); | |
288 | ||
90181136 | 289 | printk(KERN_INFO "ds-%llu: Machine description update.\n", dp->id); |
e450992d | 290 | |
778feeb4 DM |
291 | mdesc_update(); |
292 | ||
e450992d DM |
293 | memset(&pkt, 0, sizeof(pkt)); |
294 | pkt.data.tag.type = DS_DATA; | |
295 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 296 | pkt.data.handle = cp->handle; |
e450992d DM |
297 | pkt.res.req_num = rp->req_num; |
298 | pkt.res.result = DS_OK; | |
299 | ||
300 | ds_send(lp, &pkt, sizeof(pkt)); | |
301 | } | |
302 | ||
303 | struct ds_shutdown_req { | |
304 | __u64 req_num; | |
305 | __u32 ms_delay; | |
306 | }; | |
307 | ||
308 | struct ds_shutdown_res { | |
309 | __u64 req_num; | |
310 | __u32 result; | |
311 | char reason[1]; | |
312 | }; | |
313 | ||
5fc98610 DM |
314 | static void domain_shutdown_data(struct ds_info *dp, |
315 | struct ds_cap_state *cp, | |
e450992d DM |
316 | void *buf, int len) |
317 | { | |
5fc98610 | 318 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
319 | struct ds_data *dpkt = buf; |
320 | struct ds_shutdown_req *rp; | |
321 | struct { | |
322 | struct ds_data data; | |
323 | struct ds_shutdown_res res; | |
324 | } pkt; | |
325 | ||
326 | rp = (struct ds_shutdown_req *) (dpkt + 1); | |
327 | ||
90181136 | 328 | printk(KERN_ALERT "ds-%llu: Shutdown request from " |
5fc98610 | 329 | "LDOM manager received.\n", dp->id); |
e450992d DM |
330 | |
331 | memset(&pkt, 0, sizeof(pkt)); | |
332 | pkt.data.tag.type = DS_DATA; | |
333 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 334 | pkt.data.handle = cp->handle; |
e450992d DM |
335 | pkt.res.req_num = rp->req_num; |
336 | pkt.res.result = DS_OK; | |
337 | pkt.res.reason[0] = 0; | |
338 | ||
339 | ds_send(lp, &pkt, sizeof(pkt)); | |
340 | ||
a3761780 | 341 | orderly_poweroff(true); |
e450992d DM |
342 | } |
343 | ||
344 | struct ds_panic_req { | |
345 | __u64 req_num; | |
346 | }; | |
347 | ||
348 | struct ds_panic_res { | |
349 | __u64 req_num; | |
350 | __u32 result; | |
351 | char reason[1]; | |
352 | }; | |
353 | ||
5fc98610 DM |
354 | static void domain_panic_data(struct ds_info *dp, |
355 | struct ds_cap_state *cp, | |
e450992d DM |
356 | void *buf, int len) |
357 | { | |
5fc98610 | 358 | struct ldc_channel *lp = dp->lp; |
e450992d DM |
359 | struct ds_data *dpkt = buf; |
360 | struct ds_panic_req *rp; | |
361 | struct { | |
362 | struct ds_data data; | |
363 | struct ds_panic_res res; | |
364 | } pkt; | |
365 | ||
366 | rp = (struct ds_panic_req *) (dpkt + 1); | |
367 | ||
90181136 | 368 | printk(KERN_ALERT "ds-%llu: Panic request from " |
5fc98610 | 369 | "LDOM manager received.\n", dp->id); |
e450992d DM |
370 | |
371 | memset(&pkt, 0, sizeof(pkt)); | |
372 | pkt.data.tag.type = DS_DATA; | |
373 | pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag); | |
5fc98610 | 374 | pkt.data.handle = cp->handle; |
e450992d DM |
375 | pkt.res.req_num = rp->req_num; |
376 | pkt.res.result = DS_OK; | |
377 | pkt.res.reason[0] = 0; | |
378 | ||
379 | ds_send(lp, &pkt, sizeof(pkt)); | |
380 | ||
381 | panic("PANIC requested by LDOM manager."); | |
382 | } | |
383 | ||
b14f5c10 | 384 | #ifdef CONFIG_HOTPLUG_CPU |
4f0234f4 | 385 | struct dr_cpu_tag { |
e450992d DM |
386 | __u64 req_num; |
387 | __u32 type; | |
4f0234f4 DM |
388 | #define DR_CPU_CONFIGURE 0x43 |
389 | #define DR_CPU_UNCONFIGURE 0x55 | |
390 | #define DR_CPU_FORCE_UNCONFIGURE 0x46 | |
391 | #define DR_CPU_STATUS 0x53 | |
e450992d DM |
392 | |
393 | /* Responses */ | |
4f0234f4 DM |
394 | #define DR_CPU_OK 0x6f |
395 | #define DR_CPU_ERROR 0x65 | |
e450992d DM |
396 | |
397 | __u32 num_records; | |
398 | }; | |
399 | ||
4f0234f4 DM |
400 | struct dr_cpu_resp_entry { |
401 | __u32 cpu; | |
402 | __u32 result; | |
403 | #define DR_CPU_RES_OK 0x00 | |
404 | #define DR_CPU_RES_FAILURE 0x01 | |
405 | #define DR_CPU_RES_BLOCKED 0x02 | |
406 | #define DR_CPU_RES_CPU_NOT_RESPONDING 0x03 | |
407 | #define DR_CPU_RES_NOT_IN_MD 0x04 | |
408 | ||
409 | __u32 stat; | |
410 | #define DR_CPU_STAT_NOT_PRESENT 0x00 | |
411 | #define DR_CPU_STAT_UNCONFIGURED 0x01 | |
412 | #define DR_CPU_STAT_CONFIGURED 0x02 | |
413 | ||
414 | __u32 str_off; | |
e450992d DM |
415 | }; |
416 | ||
5fc98610 DM |
417 | static void __dr_cpu_send_error(struct ds_info *dp, |
418 | struct ds_cap_state *cp, | |
419 | struct ds_data *data) | |
4f0234f4 DM |
420 | { |
421 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
4f0234f4 DM |
422 | struct { |
423 | struct ds_data data; | |
424 | struct dr_cpu_tag tag; | |
425 | } pkt; | |
426 | int msg_len; | |
427 | ||
428 | memset(&pkt, 0, sizeof(pkt)); | |
429 | pkt.data.tag.type = DS_DATA; | |
430 | pkt.data.handle = cp->handle; | |
431 | pkt.tag.req_num = tag->req_num; | |
432 | pkt.tag.type = DR_CPU_ERROR; | |
433 | pkt.tag.num_records = 0; | |
434 | ||
435 | msg_len = (sizeof(struct ds_data) + | |
436 | sizeof(struct dr_cpu_tag)); | |
437 | ||
438 | pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
439 | ||
778feeb4 | 440 | __ds_send(dp->lp, &pkt, msg_len); |
4f0234f4 DM |
441 | } |
442 | ||
5fc98610 DM |
443 | static void dr_cpu_send_error(struct ds_info *dp, |
444 | struct ds_cap_state *cp, | |
445 | struct ds_data *data) | |
4f0234f4 DM |
446 | { |
447 | unsigned long flags; | |
448 | ||
449 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 450 | __dr_cpu_send_error(dp, cp, data); |
4f0234f4 DM |
451 | spin_unlock_irqrestore(&ds_lock, flags); |
452 | } | |
453 | ||
454 | #define CPU_SENTINEL 0xffffffff | |
455 | ||
456 | static void purge_dups(u32 *list, u32 num_ents) | |
457 | { | |
458 | unsigned int i; | |
459 | ||
460 | for (i = 0; i < num_ents; i++) { | |
461 | u32 cpu = list[i]; | |
462 | unsigned int j; | |
463 | ||
464 | if (cpu == CPU_SENTINEL) | |
465 | continue; | |
466 | ||
467 | for (j = i + 1; j < num_ents; j++) { | |
468 | if (list[j] == cpu) | |
469 | list[j] = CPU_SENTINEL; | |
470 | } | |
471 | } | |
472 | } | |
473 | ||
474 | static int dr_cpu_size_response(int ncpus) | |
475 | { | |
476 | return (sizeof(struct ds_data) + | |
477 | sizeof(struct dr_cpu_tag) + | |
478 | (sizeof(struct dr_cpu_resp_entry) * ncpus)); | |
479 | } | |
480 | ||
481 | static void dr_cpu_init_response(struct ds_data *resp, u64 req_num, | |
482 | u64 handle, int resp_len, int ncpus, | |
483 | cpumask_t *mask, u32 default_stat) | |
484 | { | |
485 | struct dr_cpu_resp_entry *ent; | |
486 | struct dr_cpu_tag *tag; | |
487 | int i, cpu; | |
488 | ||
489 | tag = (struct dr_cpu_tag *) (resp + 1); | |
490 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
491 | ||
492 | resp->tag.type = DS_DATA; | |
493 | resp->tag.len = resp_len - sizeof(struct ds_msg_tag); | |
494 | resp->handle = handle; | |
495 | tag->req_num = req_num; | |
496 | tag->type = DR_CPU_OK; | |
497 | tag->num_records = ncpus; | |
498 | ||
499 | i = 0; | |
500 | for_each_cpu_mask(cpu, *mask) { | |
501 | ent[i].cpu = cpu; | |
502 | ent[i].result = DR_CPU_RES_OK; | |
503 | ent[i].stat = default_stat; | |
504 | i++; | |
505 | } | |
506 | BUG_ON(i != ncpus); | |
507 | } | |
508 | ||
509 | static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus, | |
510 | u32 res, u32 stat) | |
511 | { | |
512 | struct dr_cpu_resp_entry *ent; | |
513 | struct dr_cpu_tag *tag; | |
514 | int i; | |
515 | ||
516 | tag = (struct dr_cpu_tag *) (resp + 1); | |
517 | ent = (struct dr_cpu_resp_entry *) (tag + 1); | |
518 | ||
519 | for (i = 0; i < ncpus; i++) { | |
520 | if (ent[i].cpu != cpu) | |
521 | continue; | |
522 | ent[i].result = res; | |
523 | ent[i].stat = stat; | |
524 | break; | |
525 | } | |
526 | } | |
527 | ||
7769bd1c SR |
528 | static int __cpuinit dr_cpu_configure(struct ds_info *dp, |
529 | struct ds_cap_state *cp, | |
530 | u64 req_num, | |
531 | cpumask_t *mask) | |
4f0234f4 DM |
532 | { |
533 | struct ds_data *resp; | |
534 | int resp_len, ncpus, cpu; | |
535 | unsigned long flags; | |
536 | ||
537 | ncpus = cpus_weight(*mask); | |
538 | resp_len = dr_cpu_size_response(ncpus); | |
539 | resp = kzalloc(resp_len, GFP_KERNEL); | |
540 | if (!resp) | |
541 | return -ENOMEM; | |
542 | ||
543 | dr_cpu_init_response(resp, req_num, cp->handle, | |
544 | resp_len, ncpus, mask, | |
545 | DR_CPU_STAT_CONFIGURED); | |
546 | ||
a2094502 | 547 | mdesc_fill_in_cpu_data(mask); |
4f0234f4 DM |
548 | |
549 | for_each_cpu_mask(cpu, *mask) { | |
550 | int err; | |
551 | ||
90181136 | 552 | printk(KERN_INFO "ds-%llu: Starting cpu %d...\n", |
5fc98610 | 553 | dp->id, cpu); |
4f0234f4 | 554 | err = cpu_up(cpu); |
bd0e11ff | 555 | if (err) { |
9918cc2e DM |
556 | __u32 res = DR_CPU_RES_FAILURE; |
557 | __u32 stat = DR_CPU_STAT_UNCONFIGURED; | |
558 | ||
559 | if (!cpu_present(cpu)) { | |
560 | /* CPU not present in MD */ | |
561 | res = DR_CPU_RES_NOT_IN_MD; | |
562 | stat = DR_CPU_STAT_NOT_PRESENT; | |
563 | } else if (err == -ENODEV) { | |
564 | /* CPU did not call in successfully */ | |
565 | res = DR_CPU_RES_CPU_NOT_RESPONDING; | |
566 | } | |
567 | ||
90181136 | 568 | printk(KERN_INFO "ds-%llu: CPU startup failed err=%d\n", |
5fc98610 | 569 | dp->id, err); |
9918cc2e | 570 | dr_cpu_mark(resp, cpu, ncpus, res, stat); |
bd0e11ff | 571 | } |
4f0234f4 DM |
572 | } |
573 | ||
574 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 575 | __ds_send(dp->lp, resp, resp_len); |
4f0234f4 DM |
576 | spin_unlock_irqrestore(&ds_lock, flags); |
577 | ||
578 | kfree(resp); | |
579 | ||
e0204409 DM |
580 | /* Redistribute IRQs, taking into account the new cpus. */ |
581 | fixup_irqs(); | |
582 | ||
4f0234f4 DM |
583 | return 0; |
584 | } | |
585 | ||
5fc98610 DM |
586 | static int dr_cpu_unconfigure(struct ds_info *dp, |
587 | struct ds_cap_state *cp, | |
588 | u64 req_num, | |
4f0234f4 DM |
589 | cpumask_t *mask) |
590 | { | |
591 | struct ds_data *resp; | |
e0204409 DM |
592 | int resp_len, ncpus, cpu; |
593 | unsigned long flags; | |
4f0234f4 DM |
594 | |
595 | ncpus = cpus_weight(*mask); | |
596 | resp_len = dr_cpu_size_response(ncpus); | |
597 | resp = kzalloc(resp_len, GFP_KERNEL); | |
598 | if (!resp) | |
599 | return -ENOMEM; | |
600 | ||
601 | dr_cpu_init_response(resp, req_num, cp->handle, | |
602 | resp_len, ncpus, mask, | |
603 | DR_CPU_STAT_UNCONFIGURED); | |
604 | ||
e0204409 DM |
605 | for_each_cpu_mask(cpu, *mask) { |
606 | int err; | |
607 | ||
90181136 | 608 | printk(KERN_INFO "ds-%llu: Shutting down cpu %d...\n", |
5fc98610 | 609 | dp->id, cpu); |
e0204409 DM |
610 | err = cpu_down(cpu); |
611 | if (err) | |
612 | dr_cpu_mark(resp, cpu, ncpus, | |
613 | DR_CPU_RES_FAILURE, | |
614 | DR_CPU_STAT_CONFIGURED); | |
615 | } | |
616 | ||
617 | spin_lock_irqsave(&ds_lock, flags); | |
5fc98610 | 618 | __ds_send(dp->lp, resp, resp_len); |
e0204409 DM |
619 | spin_unlock_irqrestore(&ds_lock, flags); |
620 | ||
4f0234f4 DM |
621 | kfree(resp); |
622 | ||
e0204409 | 623 | return 0; |
4f0234f4 DM |
624 | } |
625 | ||
7769bd1c SR |
626 | static void __cpuinit dr_cpu_data(struct ds_info *dp, |
627 | struct ds_cap_state *cp, | |
628 | void *buf, int len) | |
4f0234f4 | 629 | { |
778feeb4 DM |
630 | struct ds_data *data = buf; |
631 | struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1); | |
632 | u32 *cpu_list = (u32 *) (tag + 1); | |
633 | u64 req_num = tag->req_num; | |
4f0234f4 | 634 | cpumask_t mask; |
778feeb4 DM |
635 | unsigned int i; |
636 | int err; | |
4f0234f4 | 637 | |
778feeb4 DM |
638 | switch (tag->type) { |
639 | case DR_CPU_CONFIGURE: | |
640 | case DR_CPU_UNCONFIGURE: | |
641 | case DR_CPU_FORCE_UNCONFIGURE: | |
642 | break; | |
4f0234f4 | 643 | |
778feeb4 | 644 | default: |
5fc98610 | 645 | dr_cpu_send_error(dp, cp, data); |
778feeb4 | 646 | return; |
4f0234f4 | 647 | } |
4f0234f4 | 648 | |
778feeb4 | 649 | purge_dups(cpu_list, tag->num_records); |
bd0e11ff | 650 | |
778feeb4 DM |
651 | cpus_clear(mask); |
652 | for (i = 0; i < tag->num_records; i++) { | |
653 | if (cpu_list[i] == CPU_SENTINEL) | |
654 | continue; | |
bd0e11ff | 655 | |
e305cb8f | 656 | if (cpu_list[i] < nr_cpu_ids) |
778feeb4 | 657 | cpu_set(cpu_list[i], mask); |
bd0e11ff DM |
658 | } |
659 | ||
778feeb4 | 660 | if (tag->type == DR_CPU_CONFIGURE) |
5fc98610 | 661 | err = dr_cpu_configure(dp, cp, req_num, &mask); |
778feeb4 | 662 | else |
5fc98610 | 663 | err = dr_cpu_unconfigure(dp, cp, req_num, &mask); |
e450992d | 664 | |
778feeb4 | 665 | if (err) |
5fc98610 | 666 | dr_cpu_send_error(dp, cp, data); |
e450992d | 667 | } |
778feeb4 | 668 | #endif /* CONFIG_HOTPLUG_CPU */ |
e450992d DM |
669 | |
670 | struct ds_pri_msg { | |
671 | __u64 req_num; | |
672 | __u64 type; | |
673 | #define DS_PRI_REQUEST 0x00 | |
674 | #define DS_PRI_DATA 0x01 | |
675 | #define DS_PRI_UPDATE 0x02 | |
676 | }; | |
677 | ||
5fc98610 DM |
678 | static void ds_pri_data(struct ds_info *dp, |
679 | struct ds_cap_state *cp, | |
e450992d DM |
680 | void *buf, int len) |
681 | { | |
682 | struct ds_data *dpkt = buf; | |
683 | struct ds_pri_msg *rp; | |
684 | ||
685 | rp = (struct ds_pri_msg *) (dpkt + 1); | |
686 | ||
90181136 | 687 | printk(KERN_INFO "ds-%llu: PRI REQ [%llx:%llx], len=%d\n", |
5fc98610 | 688 | dp->id, rp->req_num, rp->type, len); |
e450992d DM |
689 | } |
690 | ||
b3e13fbe DM |
691 | struct ds_var_hdr { |
692 | __u32 type; | |
693 | #define DS_VAR_SET_REQ 0x00 | |
694 | #define DS_VAR_DELETE_REQ 0x01 | |
695 | #define DS_VAR_SET_RESP 0x02 | |
696 | #define DS_VAR_DELETE_RESP 0x03 | |
697 | }; | |
698 | ||
699 | struct ds_var_set_msg { | |
700 | struct ds_var_hdr hdr; | |
701 | char name_and_value[0]; | |
702 | }; | |
703 | ||
704 | struct ds_var_delete_msg { | |
705 | struct ds_var_hdr hdr; | |
706 | char name[0]; | |
707 | }; | |
708 | ||
709 | struct ds_var_resp { | |
710 | struct ds_var_hdr hdr; | |
711 | __u32 result; | |
712 | #define DS_VAR_SUCCESS 0x00 | |
713 | #define DS_VAR_NO_SPACE 0x01 | |
714 | #define DS_VAR_INVALID_VAR 0x02 | |
715 | #define DS_VAR_INVALID_VAL 0x03 | |
716 | #define DS_VAR_NOT_PRESENT 0x04 | |
717 | }; | |
718 | ||
719 | static DEFINE_MUTEX(ds_var_mutex); | |
720 | static int ds_var_doorbell; | |
721 | static int ds_var_response; | |
722 | ||
5fc98610 DM |
723 | static void ds_var_data(struct ds_info *dp, |
724 | struct ds_cap_state *cp, | |
b3e13fbe DM |
725 | void *buf, int len) |
726 | { | |
727 | struct ds_data *dpkt = buf; | |
728 | struct ds_var_resp *rp; | |
729 | ||
730 | rp = (struct ds_var_resp *) (dpkt + 1); | |
731 | ||
732 | if (rp->hdr.type != DS_VAR_SET_RESP && | |
733 | rp->hdr.type != DS_VAR_DELETE_RESP) | |
734 | return; | |
735 | ||
736 | ds_var_response = rp->result; | |
737 | wmb(); | |
738 | ds_var_doorbell = 1; | |
739 | } | |
740 | ||
b3e13fbe DM |
741 | void ldom_set_var(const char *var, const char *value) |
742 | { | |
b3e13fbe | 743 | struct ds_cap_state *cp; |
5fc98610 DM |
744 | struct ds_info *dp; |
745 | unsigned long flags; | |
746 | ||
747 | spin_lock_irqsave(&ds_lock, flags); | |
748 | cp = NULL; | |
749 | for (dp = ds_info_list; dp; dp = dp->next) { | |
750 | struct ds_cap_state *tmp; | |
751 | ||
752 | tmp = find_cap_by_string(dp, "var-config"); | |
753 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
754 | cp = tmp; | |
755 | break; | |
756 | } | |
757 | } | |
758 | if (!cp) { | |
759 | for (dp = ds_info_list; dp; dp = dp->next) { | |
760 | struct ds_cap_state *tmp; | |
b3e13fbe | 761 | |
5fc98610 DM |
762 | tmp = find_cap_by_string(dp, "var-config-backup"); |
763 | if (tmp && tmp->state == CAP_STATE_REGISTERED) { | |
764 | cp = tmp; | |
765 | break; | |
766 | } | |
767 | } | |
768 | } | |
769 | spin_unlock_irqrestore(&ds_lock, flags); | |
b3e13fbe | 770 | |
5fc98610 | 771 | if (cp) { |
b3e13fbe DM |
772 | union { |
773 | struct { | |
774 | struct ds_data data; | |
775 | struct ds_var_set_msg msg; | |
776 | } header; | |
777 | char all[512]; | |
778 | } pkt; | |
b3e13fbe DM |
779 | char *base, *p; |
780 | int msg_len, loops; | |
781 | ||
782 | memset(&pkt, 0, sizeof(pkt)); | |
783 | pkt.header.data.tag.type = DS_DATA; | |
784 | pkt.header.data.handle = cp->handle; | |
785 | pkt.header.msg.hdr.type = DS_VAR_SET_REQ; | |
786 | base = p = &pkt.header.msg.name_and_value[0]; | |
787 | strcpy(p, var); | |
788 | p += strlen(var) + 1; | |
789 | strcpy(p, value); | |
790 | p += strlen(value) + 1; | |
791 | ||
792 | msg_len = (sizeof(struct ds_data) + | |
4f0234f4 DM |
793 | sizeof(struct ds_var_set_msg) + |
794 | (p - base)); | |
b3e13fbe DM |
795 | msg_len = (msg_len + 3) & ~3; |
796 | pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag); | |
797 | ||
798 | mutex_lock(&ds_var_mutex); | |
799 | ||
800 | spin_lock_irqsave(&ds_lock, flags); | |
801 | ds_var_doorbell = 0; | |
802 | ds_var_response = -1; | |
803 | ||
778feeb4 | 804 | __ds_send(dp->lp, &pkt, msg_len); |
b3e13fbe DM |
805 | spin_unlock_irqrestore(&ds_lock, flags); |
806 | ||
807 | loops = 1000; | |
808 | while (ds_var_doorbell == 0) { | |
809 | if (loops-- < 0) | |
810 | break; | |
811 | barrier(); | |
812 | udelay(100); | |
813 | } | |
814 | ||
815 | mutex_unlock(&ds_var_mutex); | |
816 | ||
817 | if (ds_var_doorbell == 0 || | |
818 | ds_var_response != DS_VAR_SUCCESS) | |
90181136 | 819 | printk(KERN_ERR "ds-%llu: var-config [%s:%s] " |
b3e13fbe | 820 | "failed, response(%d).\n", |
5fc98610 | 821 | dp->id, var, value, |
b3e13fbe DM |
822 | ds_var_response); |
823 | } else { | |
824 | printk(KERN_ERR PFX "var-config not registered so " | |
825 | "could not set (%s) variable to (%s).\n", | |
826 | var, value); | |
827 | } | |
828 | } | |
829 | ||
830 | void ldom_reboot(const char *boot_command) | |
831 | { | |
832 | /* Don't bother with any of this if the boot_command | |
833 | * is empty. | |
834 | */ | |
835 | if (boot_command && strlen(boot_command)) { | |
836 | char full_boot_str[256]; | |
837 | ||
838 | strcpy(full_boot_str, "boot "); | |
839 | strcpy(full_boot_str + strlen("boot "), boot_command); | |
840 | ||
841 | ldom_set_var("reboot-command", full_boot_str); | |
842 | } | |
843 | sun4v_mach_sir(); | |
844 | } | |
845 | ||
4f0234f4 DM |
846 | void ldom_power_off(void) |
847 | { | |
848 | sun4v_mach_exit(0); | |
849 | } | |
850 | ||
e450992d DM |
851 | static void ds_conn_reset(struct ds_info *dp) |
852 | { | |
90181136 | 853 | printk(KERN_ERR "ds-%llu: ds_conn_reset() from %p\n", |
5fc98610 | 854 | dp->id, __builtin_return_address(0)); |
e450992d DM |
855 | } |
856 | ||
857 | static int register_services(struct ds_info *dp) | |
858 | { | |
859 | struct ldc_channel *lp = dp->lp; | |
860 | int i; | |
861 | ||
5fc98610 | 862 | for (i = 0; i < dp->num_ds_states; i++) { |
e450992d DM |
863 | struct { |
864 | struct ds_reg_req req; | |
865 | u8 id_buf[256]; | |
866 | } pbuf; | |
5fc98610 | 867 | struct ds_cap_state *cp = &dp->ds_states[i]; |
e450992d DM |
868 | int err, msg_len; |
869 | u64 new_count; | |
870 | ||
871 | if (cp->state == CAP_STATE_REGISTERED) | |
872 | continue; | |
873 | ||
874 | new_count = sched_clock() & 0xffffffff; | |
875 | cp->handle = ((u64) i << 32) | new_count; | |
876 | ||
877 | msg_len = (sizeof(struct ds_reg_req) + | |
878 | strlen(cp->service_id)); | |
879 | ||
880 | memset(&pbuf, 0, sizeof(pbuf)); | |
881 | pbuf.req.tag.type = DS_REG_REQ; | |
882 | pbuf.req.tag.len = (msg_len - sizeof(struct ds_msg_tag)); | |
883 | pbuf.req.handle = cp->handle; | |
884 | pbuf.req.major = 1; | |
885 | pbuf.req.minor = 0; | |
886 | strcpy(pbuf.req.svc_id, cp->service_id); | |
887 | ||
778feeb4 | 888 | err = __ds_send(lp, &pbuf, msg_len); |
e450992d DM |
889 | if (err > 0) |
890 | cp->state = CAP_STATE_REG_SENT; | |
891 | } | |
892 | return 0; | |
893 | } | |
894 | ||
895 | static int ds_handshake(struct ds_info *dp, struct ds_msg_tag *pkt) | |
896 | { | |
897 | ||
898 | if (dp->hs_state == DS_HS_START) { | |
899 | if (pkt->type != DS_INIT_ACK) | |
900 | goto conn_reset; | |
901 | ||
902 | dp->hs_state = DS_HS_DONE; | |
903 | ||
904 | return register_services(dp); | |
905 | } | |
906 | ||
907 | if (dp->hs_state != DS_HS_DONE) | |
908 | goto conn_reset; | |
909 | ||
910 | if (pkt->type == DS_REG_ACK) { | |
911 | struct ds_reg_ack *ap = (struct ds_reg_ack *) pkt; | |
5fc98610 | 912 | struct ds_cap_state *cp = find_cap(dp, ap->handle); |
e450992d DM |
913 | |
914 | if (!cp) { | |
90181136 SR |
915 | printk(KERN_ERR "ds-%llu: REG ACK for unknown " |
916 | "handle %llx\n", dp->id, ap->handle); | |
e450992d DM |
917 | return 0; |
918 | } | |
90181136 | 919 | printk(KERN_INFO "ds-%llu: Registered %s service.\n", |
5fc98610 | 920 | dp->id, cp->service_id); |
e450992d DM |
921 | cp->state = CAP_STATE_REGISTERED; |
922 | } else if (pkt->type == DS_REG_NACK) { | |
923 | struct ds_reg_nack *np = (struct ds_reg_nack *) pkt; | |
5fc98610 | 924 | struct ds_cap_state *cp = find_cap(dp, np->handle); |
e450992d DM |
925 | |
926 | if (!cp) { | |
90181136 SR |
927 | printk(KERN_ERR "ds-%llu: REG NACK for " |
928 | "unknown handle %llx\n", | |
5fc98610 | 929 | dp->id, np->handle); |
e450992d DM |
930 | return 0; |
931 | } | |
e450992d DM |
932 | cp->state = CAP_STATE_UNKNOWN; |
933 | } | |
934 | ||
935 | return 0; | |
936 | ||
937 | conn_reset: | |
938 | ds_conn_reset(dp); | |
939 | return -ECONNRESET; | |
940 | } | |
941 | ||
778feeb4 DM |
942 | static void __send_ds_nack(struct ds_info *dp, u64 handle) |
943 | { | |
944 | struct ds_data_nack nack = { | |
945 | .tag = { | |
946 | .type = DS_NACK, | |
947 | .len = (sizeof(struct ds_data_nack) - | |
948 | sizeof(struct ds_msg_tag)), | |
949 | }, | |
950 | .handle = handle, | |
951 | .result = DS_INV_HDL, | |
952 | }; | |
953 | ||
954 | __ds_send(dp->lp, &nack, sizeof(nack)); | |
955 | } | |
956 | ||
957 | static LIST_HEAD(ds_work_list); | |
958 | static DECLARE_WAIT_QUEUE_HEAD(ds_wait); | |
959 | ||
960 | struct ds_queue_entry { | |
961 | struct list_head list; | |
5fc98610 | 962 | struct ds_info *dp; |
778feeb4 DM |
963 | int req_len; |
964 | int __pad; | |
965 | u64 req[0]; | |
966 | }; | |
967 | ||
968 | static void process_ds_work(void) | |
969 | { | |
970 | struct ds_queue_entry *qp, *tmp; | |
778feeb4 DM |
971 | unsigned long flags; |
972 | LIST_HEAD(todo); | |
973 | ||
974 | spin_lock_irqsave(&ds_lock, flags); | |
1f17131b | 975 | list_splice_init(&ds_work_list, &todo); |
778feeb4 DM |
976 | spin_unlock_irqrestore(&ds_lock, flags); |
977 | ||
778feeb4 DM |
978 | list_for_each_entry_safe(qp, tmp, &todo, list) { |
979 | struct ds_data *dpkt = (struct ds_data *) qp->req; | |
5fc98610 DM |
980 | struct ds_info *dp = qp->dp; |
981 | struct ds_cap_state *cp = find_cap(dp, dpkt->handle); | |
778feeb4 DM |
982 | int req_len = qp->req_len; |
983 | ||
984 | if (!cp) { | |
90181136 SR |
985 | printk(KERN_ERR "ds-%llu: Data for unknown " |
986 | "handle %llu\n", | |
5fc98610 | 987 | dp->id, dpkt->handle); |
778feeb4 DM |
988 | |
989 | spin_lock_irqsave(&ds_lock, flags); | |
990 | __send_ds_nack(dp, dpkt->handle); | |
991 | spin_unlock_irqrestore(&ds_lock, flags); | |
992 | } else { | |
5fc98610 | 993 | cp->data(dp, cp, dpkt, req_len); |
778feeb4 DM |
994 | } |
995 | ||
996 | list_del(&qp->list); | |
997 | kfree(qp); | |
998 | } | |
999 | } | |
1000 | ||
1001 | static int ds_thread(void *__unused) | |
1002 | { | |
1003 | DEFINE_WAIT(wait); | |
1004 | ||
1005 | while (1) { | |
1006 | prepare_to_wait(&ds_wait, &wait, TASK_INTERRUPTIBLE); | |
1007 | if (list_empty(&ds_work_list)) | |
1008 | schedule(); | |
1009 | finish_wait(&ds_wait, &wait); | |
1010 | ||
1011 | if (kthread_should_stop()) | |
1012 | break; | |
1013 | ||
1014 | process_ds_work(); | |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
e450992d DM |
1020 | static int ds_data(struct ds_info *dp, struct ds_msg_tag *pkt, int len) |
1021 | { | |
1022 | struct ds_data *dpkt = (struct ds_data *) pkt; | |
778feeb4 DM |
1023 | struct ds_queue_entry *qp; |
1024 | ||
1025 | qp = kmalloc(sizeof(struct ds_queue_entry) + len, GFP_ATOMIC); | |
1026 | if (!qp) { | |
1027 | __send_ds_nack(dp, dpkt->handle); | |
e450992d | 1028 | } else { |
5fc98610 | 1029 | qp->dp = dp; |
778feeb4 DM |
1030 | memcpy(&qp->req, pkt, len); |
1031 | list_add_tail(&qp->list, &ds_work_list); | |
1032 | wake_up(&ds_wait); | |
e450992d DM |
1033 | } |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | static void ds_up(struct ds_info *dp) | |
1038 | { | |
1039 | struct ldc_channel *lp = dp->lp; | |
1040 | struct ds_ver_req req; | |
1041 | int err; | |
1042 | ||
1043 | req.tag.type = DS_INIT_REQ; | |
1044 | req.tag.len = sizeof(req) - sizeof(struct ds_msg_tag); | |
1045 | req.ver.major = 1; | |
1046 | req.ver.minor = 0; | |
1047 | ||
778feeb4 | 1048 | err = __ds_send(lp, &req, sizeof(req)); |
e450992d DM |
1049 | if (err > 0) |
1050 | dp->hs_state = DS_HS_START; | |
1051 | } | |
1052 | ||
8a2950cc DM |
1053 | static void ds_reset(struct ds_info *dp) |
1054 | { | |
1055 | int i; | |
1056 | ||
1057 | dp->hs_state = 0; | |
1058 | ||
5fc98610 DM |
1059 | for (i = 0; i < dp->num_ds_states; i++) { |
1060 | struct ds_cap_state *cp = &dp->ds_states[i]; | |
8a2950cc DM |
1061 | |
1062 | cp->state = CAP_STATE_UNKNOWN; | |
1063 | } | |
1064 | } | |
1065 | ||
e450992d DM |
1066 | static void ds_event(void *arg, int event) |
1067 | { | |
1068 | struct ds_info *dp = arg; | |
1069 | struct ldc_channel *lp = dp->lp; | |
1070 | unsigned long flags; | |
1071 | int err; | |
1072 | ||
1073 | spin_lock_irqsave(&ds_lock, flags); | |
1074 | ||
1075 | if (event == LDC_EVENT_UP) { | |
1076 | ds_up(dp); | |
1077 | spin_unlock_irqrestore(&ds_lock, flags); | |
1078 | return; | |
1079 | } | |
1080 | ||
8a2950cc DM |
1081 | if (event == LDC_EVENT_RESET) { |
1082 | ds_reset(dp); | |
1083 | spin_unlock_irqrestore(&ds_lock, flags); | |
1084 | return; | |
1085 | } | |
1086 | ||
e450992d | 1087 | if (event != LDC_EVENT_DATA_READY) { |
90181136 | 1088 | printk(KERN_WARNING "ds-%llu: Unexpected LDC event %d\n", |
5fc98610 | 1089 | dp->id, event); |
e450992d DM |
1090 | spin_unlock_irqrestore(&ds_lock, flags); |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | err = 0; | |
1095 | while (1) { | |
1096 | struct ds_msg_tag *tag; | |
1097 | ||
1098 | err = ldc_read(lp, dp->rcv_buf, sizeof(*tag)); | |
1099 | ||
1100 | if (unlikely(err < 0)) { | |
1101 | if (err == -ECONNRESET) | |
1102 | ds_conn_reset(dp); | |
1103 | break; | |
1104 | } | |
1105 | if (err == 0) | |
1106 | break; | |
1107 | ||
1108 | tag = dp->rcv_buf; | |
1109 | err = ldc_read(lp, tag + 1, tag->len); | |
1110 | ||
1111 | if (unlikely(err < 0)) { | |
1112 | if (err == -ECONNRESET) | |
1113 | ds_conn_reset(dp); | |
1114 | break; | |
1115 | } | |
1116 | if (err < tag->len) | |
1117 | break; | |
1118 | ||
1119 | if (tag->type < DS_DATA) | |
1120 | err = ds_handshake(dp, dp->rcv_buf); | |
1121 | else | |
1122 | err = ds_data(dp, dp->rcv_buf, | |
1123 | sizeof(*tag) + err); | |
1124 | if (err == -ECONNRESET) | |
1125 | break; | |
1126 | } | |
1127 | ||
1128 | spin_unlock_irqrestore(&ds_lock, flags); | |
1129 | } | |
1130 | ||
1131 | static int __devinit ds_probe(struct vio_dev *vdev, | |
1132 | const struct vio_device_id *id) | |
1133 | { | |
1134 | static int ds_version_printed; | |
e450992d DM |
1135 | struct ldc_channel_config ds_cfg = { |
1136 | .event = ds_event, | |
1137 | .mtu = 4096, | |
1138 | .mode = LDC_MODE_STREAM, | |
1139 | }; | |
5fc98610 | 1140 | struct mdesc_handle *hp; |
e450992d DM |
1141 | struct ldc_channel *lp; |
1142 | struct ds_info *dp; | |
5fc98610 DM |
1143 | const u64 *val; |
1144 | int err, i; | |
e450992d DM |
1145 | |
1146 | if (ds_version_printed++ == 0) | |
1147 | printk(KERN_INFO "%s", version); | |
1148 | ||
e450992d DM |
1149 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
1150 | err = -ENOMEM; | |
1151 | if (!dp) | |
1152 | goto out_err; | |
1153 | ||
5fc98610 DM |
1154 | hp = mdesc_grab(); |
1155 | val = mdesc_get_property(hp, vdev->mp, "id", NULL); | |
1156 | if (val) | |
1157 | dp->id = *val; | |
1158 | mdesc_release(hp); | |
1159 | ||
e450992d DM |
1160 | dp->rcv_buf = kzalloc(4096, GFP_KERNEL); |
1161 | if (!dp->rcv_buf) | |
1162 | goto out_free_dp; | |
1163 | ||
1164 | dp->rcv_buf_len = 4096; | |
1165 | ||
5fc98610 DM |
1166 | dp->ds_states = kzalloc(sizeof(ds_states_template), |
1167 | GFP_KERNEL); | |
1168 | if (!dp->ds_states) | |
1169 | goto out_free_rcv_buf; | |
1170 | ||
1171 | memcpy(dp->ds_states, ds_states_template, | |
1172 | sizeof(ds_states_template)); | |
1173 | dp->num_ds_states = ARRAY_SIZE(ds_states_template); | |
1174 | ||
1175 | for (i = 0; i < dp->num_ds_states; i++) | |
1176 | dp->ds_states[i].handle = ((u64)i << 32); | |
1177 | ||
43fdf274 DM |
1178 | ds_cfg.tx_irq = vdev->tx_irq; |
1179 | ds_cfg.rx_irq = vdev->rx_irq; | |
e450992d | 1180 | |
43fdf274 | 1181 | lp = ldc_alloc(vdev->channel_id, &ds_cfg, dp); |
e450992d DM |
1182 | if (IS_ERR(lp)) { |
1183 | err = PTR_ERR(lp); | |
5fc98610 | 1184 | goto out_free_ds_states; |
e450992d DM |
1185 | } |
1186 | dp->lp = lp; | |
1187 | ||
133f09a1 | 1188 | err = ldc_bind(lp, "DS"); |
e450992d DM |
1189 | if (err) |
1190 | goto out_free_ldc; | |
1191 | ||
5fc98610 DM |
1192 | spin_lock_irq(&ds_lock); |
1193 | dp->next = ds_info_list; | |
1194 | ds_info_list = dp; | |
1195 | spin_unlock_irq(&ds_lock); | |
b3e13fbe | 1196 | |
e450992d DM |
1197 | return err; |
1198 | ||
1199 | out_free_ldc: | |
1200 | ldc_free(dp->lp); | |
1201 | ||
5fc98610 DM |
1202 | out_free_ds_states: |
1203 | kfree(dp->ds_states); | |
1204 | ||
e450992d DM |
1205 | out_free_rcv_buf: |
1206 | kfree(dp->rcv_buf); | |
1207 | ||
1208 | out_free_dp: | |
1209 | kfree(dp); | |
1210 | ||
1211 | out_err: | |
1212 | return err; | |
1213 | } | |
1214 | ||
1215 | static int ds_remove(struct vio_dev *vdev) | |
1216 | { | |
1217 | return 0; | |
1218 | } | |
1219 | ||
3d452e55 | 1220 | static struct vio_device_id __initdata ds_match[] = { |
e450992d DM |
1221 | { |
1222 | .type = "domain-services-port", | |
1223 | }, | |
1224 | {}, | |
1225 | }; | |
1226 | ||
1227 | static struct vio_driver ds_driver = { | |
1228 | .id_table = ds_match, | |
1229 | .probe = ds_probe, | |
1230 | .remove = ds_remove, | |
1231 | .driver = { | |
1232 | .name = "ds", | |
1233 | .owner = THIS_MODULE, | |
1234 | } | |
1235 | }; | |
1236 | ||
1237 | static int __init ds_init(void) | |
1238 | { | |
778feeb4 | 1239 | kthread_run(ds_thread, NULL, "kldomd"); |
bd0e11ff | 1240 | |
e450992d DM |
1241 | return vio_register_driver(&ds_driver); |
1242 | } | |
1243 | ||
1244 | subsys_initcall(ds_init); |