Commit | Line | Data |
---|---|---|
08d07968 | 1 | /* |
03997904 | 2 | * Copyright IBM Corp. 2007, 2009 |
08d07968 | 3 | * |
03997904 GS |
4 | * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, |
5 | * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | |
08d07968 HC |
6 | */ |
7 | ||
b3ff088b MS |
8 | #define KMSG_COMPONENT "sclp_cmd" |
9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
10 | ||
08d07968 HC |
11 | #include <linux/completion.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/errno.h> | |
03997904 | 14 | #include <linux/err.h> |
08d07968 HC |
15 | #include <linux/slab.h> |
16 | #include <linux/string.h> | |
e0bc2495 HC |
17 | #include <linux/mm.h> |
18 | #include <linux/mmzone.h> | |
19 | #include <linux/memory.h> | |
03997904 | 20 | #include <linux/platform_device.h> |
4b28a8fe | 21 | #include <asm/chpid.h> |
08d07968 | 22 | #include <asm/sclp.h> |
23d75d9c | 23 | #include <asm/setup.h> |
08d07968 | 24 | |
b3ff088b | 25 | #include "sclp.h" |
08d07968 HC |
26 | |
27 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
28 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
29 | ||
30 | struct read_info_sccb { | |
31 | struct sccb_header header; /* 0-7 */ | |
32 | u16 rnmax; /* 8-9 */ | |
33 | u8 rnsize; /* 10 */ | |
34 | u8 _reserved0[24 - 11]; /* 11-15 */ | |
35 | u8 loadparm[8]; /* 24-31 */ | |
36 | u8 _reserved1[48 - 32]; /* 32-47 */ | |
37 | u64 facilities; /* 48-55 */ | |
38 | u8 _reserved2[84 - 56]; /* 56-83 */ | |
39 | u8 fac84; /* 84 */ | |
40 | u8 _reserved3[91 - 85]; /* 85-90 */ | |
41 | u8 flags; /* 91 */ | |
42 | u8 _reserved4[100 - 92]; /* 92-99 */ | |
43 | u32 rnsize2; /* 100-103 */ | |
44 | u64 rnmax2; /* 104-111 */ | |
45 | u8 _reserved5[4096 - 112]; /* 112-4095 */ | |
46 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
47 | ||
48 | static struct read_info_sccb __initdata early_read_info_sccb; | |
49 | static int __initdata early_read_info_sccb_valid; | |
50 | ||
51 | u64 sclp_facilities; | |
52 | static u8 sclp_fac84; | |
e0bc2495 HC |
53 | static unsigned long long rzm; |
54 | static unsigned long long rnmax; | |
08d07968 HC |
55 | |
56 | static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) | |
57 | { | |
58 | int rc; | |
59 | ||
60 | __ctl_set_bit(0, 9); | |
61 | rc = sclp_service_call(cmd, sccb); | |
62 | if (rc) | |
63 | goto out; | |
64 | __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT | | |
65 | PSW_MASK_WAIT | PSW_DEFAULT_KEY); | |
66 | local_irq_disable(); | |
67 | out: | |
68 | /* Contents of the sccb might have changed. */ | |
69 | barrier(); | |
70 | __ctl_clear_bit(0, 9); | |
71 | return rc; | |
72 | } | |
73 | ||
23d17421 | 74 | static void __init sclp_read_info_early(void) |
08d07968 HC |
75 | { |
76 | int rc; | |
77 | int i; | |
78 | struct read_info_sccb *sccb; | |
79 | sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, | |
80 | SCLP_CMDW_READ_SCP_INFO}; | |
81 | ||
82 | sccb = &early_read_info_sccb; | |
83 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
84 | do { | |
85 | memset(sccb, 0, sizeof(*sccb)); | |
86 | sccb->header.length = sizeof(*sccb); | |
cb9d7160 | 87 | sccb->header.function_code = 0x80; |
08d07968 HC |
88 | sccb->header.control_mask[2] = 0x80; |
89 | rc = sclp_cmd_sync_early(commands[i], sccb); | |
90 | } while (rc == -EBUSY); | |
91 | ||
92 | if (rc) | |
93 | break; | |
94 | if (sccb->header.response_code == 0x10) { | |
95 | early_read_info_sccb_valid = 1; | |
96 | break; | |
97 | } | |
98 | if (sccb->header.response_code != 0x1f0) | |
99 | break; | |
100 | } | |
101 | } | |
102 | ||
103 | void __init sclp_facilities_detect(void) | |
104 | { | |
08d07968 HC |
105 | struct read_info_sccb *sccb; |
106 | ||
23d17421 | 107 | sclp_read_info_early(); |
08d07968 | 108 | if (!early_read_info_sccb_valid) |
23d17421 HC |
109 | return; |
110 | ||
08d07968 | 111 | sccb = &early_read_info_sccb; |
23d17421 HC |
112 | sclp_facilities = sccb->facilities; |
113 | sclp_fac84 = sccb->fac84; | |
e0bc2495 HC |
114 | rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; |
115 | rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; | |
116 | rzm <<= 20; | |
23d17421 HC |
117 | } |
118 | ||
119 | unsigned long long sclp_get_rnmax(void) | |
120 | { | |
121 | return rnmax; | |
122 | } | |
123 | ||
124 | unsigned long long sclp_get_rzm(void) | |
125 | { | |
126 | return rzm; | |
08d07968 HC |
127 | } |
128 | ||
129 | /* | |
23d17421 HC |
130 | * This function will be called after sclp_facilities_detect(), which gets |
131 | * called from early.c code. Therefore the sccb should have valid contents. | |
08d07968 HC |
132 | */ |
133 | void __init sclp_get_ipl_info(struct sclp_ipl_info *info) | |
134 | { | |
135 | struct read_info_sccb *sccb; | |
136 | ||
137 | if (!early_read_info_sccb_valid) | |
138 | return; | |
139 | sccb = &early_read_info_sccb; | |
140 | info->is_valid = 1; | |
141 | if (sccb->flags & 0x2) | |
142 | info->has_dump = 1; | |
143 | memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); | |
144 | } | |
145 | ||
146 | static void sclp_sync_callback(struct sclp_req *req, void *data) | |
147 | { | |
148 | struct completion *completion = data; | |
149 | ||
150 | complete(completion); | |
151 | } | |
152 | ||
153 | static int do_sync_request(sclp_cmdw_t cmd, void *sccb) | |
154 | { | |
155 | struct completion completion; | |
156 | struct sclp_req *request; | |
157 | int rc; | |
158 | ||
159 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
160 | if (!request) | |
161 | return -ENOMEM; | |
162 | request->command = cmd; | |
163 | request->sccb = sccb; | |
164 | request->status = SCLP_REQ_FILLED; | |
165 | request->callback = sclp_sync_callback; | |
166 | request->callback_data = &completion; | |
167 | init_completion(&completion); | |
168 | ||
169 | /* Perform sclp request. */ | |
170 | rc = sclp_add_request(request); | |
171 | if (rc) | |
172 | goto out; | |
173 | wait_for_completion(&completion); | |
174 | ||
175 | /* Check response. */ | |
176 | if (request->status != SCLP_REQ_DONE) { | |
b3ff088b MS |
177 | pr_warning("sync request failed (cmd=0x%08x, " |
178 | "status=0x%02x)\n", cmd, request->status); | |
08d07968 HC |
179 | rc = -EIO; |
180 | } | |
181 | out: | |
182 | kfree(request); | |
183 | return rc; | |
184 | } | |
185 | ||
186 | /* | |
187 | * CPU configuration related functions. | |
188 | */ | |
189 | ||
190 | #define SCLP_CMDW_READ_CPU_INFO 0x00010001 | |
191 | #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 | |
192 | #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 | |
193 | ||
194 | struct read_cpu_info_sccb { | |
195 | struct sccb_header header; | |
196 | u16 nr_configured; | |
197 | u16 offset_configured; | |
198 | u16 nr_standby; | |
199 | u16 offset_standby; | |
200 | u8 reserved[4096 - 16]; | |
201 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
202 | ||
08d07968 HC |
203 | static void sclp_fill_cpu_info(struct sclp_cpu_info *info, |
204 | struct read_cpu_info_sccb *sccb) | |
205 | { | |
206 | char *page = (char *) sccb; | |
207 | ||
208 | memset(info, 0, sizeof(*info)); | |
209 | info->configured = sccb->nr_configured; | |
210 | info->standby = sccb->nr_standby; | |
211 | info->combined = sccb->nr_configured + sccb->nr_standby; | |
212 | info->has_cpu_type = sclp_fac84 & 0x1; | |
213 | memcpy(&info->cpu, page + sccb->offset_configured, | |
214 | info->combined * sizeof(struct sclp_cpu_entry)); | |
215 | } | |
216 | ||
48483b32 | 217 | int sclp_get_cpu_info(struct sclp_cpu_info *info) |
08d07968 HC |
218 | { |
219 | int rc; | |
220 | struct read_cpu_info_sccb *sccb; | |
221 | ||
222 | if (!SCLP_HAS_CPU_INFO) | |
223 | return -EOPNOTSUPP; | |
48483b32 | 224 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
08d07968 HC |
225 | if (!sccb) |
226 | return -ENOMEM; | |
08d07968 HC |
227 | sccb->header.length = sizeof(*sccb); |
228 | rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb); | |
229 | if (rc) | |
230 | goto out; | |
231 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
232 | pr_warning("readcpuinfo failed (response=0x%04x)\n", |
233 | sccb->header.response_code); | |
08d07968 HC |
234 | rc = -EIO; |
235 | goto out; | |
236 | } | |
237 | sclp_fill_cpu_info(info, sccb); | |
238 | out: | |
239 | free_page((unsigned long) sccb); | |
240 | return rc; | |
241 | } | |
242 | ||
08d07968 HC |
243 | struct cpu_configure_sccb { |
244 | struct sccb_header header; | |
245 | } __attribute__((packed, aligned(8))); | |
246 | ||
247 | static int do_cpu_configure(sclp_cmdw_t cmd) | |
248 | { | |
249 | struct cpu_configure_sccb *sccb; | |
250 | int rc; | |
251 | ||
252 | if (!SCLP_HAS_CPU_RECONFIG) | |
253 | return -EOPNOTSUPP; | |
254 | /* | |
255 | * This is not going to cross a page boundary since we force | |
256 | * kmalloc to have a minimum alignment of 8 bytes on s390. | |
257 | */ | |
258 | sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); | |
259 | if (!sccb) | |
260 | return -ENOMEM; | |
261 | sccb->header.length = sizeof(*sccb); | |
262 | rc = do_sync_request(cmd, sccb); | |
263 | if (rc) | |
264 | goto out; | |
265 | switch (sccb->header.response_code) { | |
266 | case 0x0020: | |
267 | case 0x0120: | |
268 | break; | |
269 | default: | |
b3ff088b MS |
270 | pr_warning("configure cpu failed (cmd=0x%08x, " |
271 | "response=0x%04x)\n", cmd, | |
272 | sccb->header.response_code); | |
08d07968 HC |
273 | rc = -EIO; |
274 | break; | |
275 | } | |
276 | out: | |
277 | kfree(sccb); | |
278 | return rc; | |
279 | } | |
280 | ||
281 | int sclp_cpu_configure(u8 cpu) | |
282 | { | |
283 | return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); | |
284 | } | |
285 | ||
286 | int sclp_cpu_deconfigure(u8 cpu) | |
287 | { | |
288 | return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); | |
289 | } | |
4b28a8fe | 290 | |
e0bc2495 HC |
291 | #ifdef CONFIG_MEMORY_HOTPLUG |
292 | ||
293 | static DEFINE_MUTEX(sclp_mem_mutex); | |
294 | static LIST_HEAD(sclp_mem_list); | |
295 | static u8 sclp_max_storage_id; | |
296 | static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; | |
03997904 | 297 | static int sclp_mem_state_changed; |
e0bc2495 HC |
298 | |
299 | struct memory_increment { | |
300 | struct list_head list; | |
301 | u16 rn; | |
302 | int standby; | |
303 | int usecount; | |
304 | }; | |
305 | ||
306 | struct assign_storage_sccb { | |
307 | struct sccb_header header; | |
308 | u16 rn; | |
309 | } __packed; | |
310 | ||
311 | static unsigned long long rn2addr(u16 rn) | |
312 | { | |
313 | return (unsigned long long) (rn - 1) * rzm; | |
314 | } | |
315 | ||
316 | static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) | |
317 | { | |
318 | struct assign_storage_sccb *sccb; | |
319 | int rc; | |
320 | ||
321 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
322 | if (!sccb) | |
323 | return -ENOMEM; | |
324 | sccb->header.length = PAGE_SIZE; | |
325 | sccb->rn = rn; | |
326 | rc = do_sync_request(cmd, sccb); | |
327 | if (rc) | |
328 | goto out; | |
329 | switch (sccb->header.response_code) { | |
330 | case 0x0020: | |
331 | case 0x0120: | |
332 | break; | |
333 | default: | |
675be97a HC |
334 | pr_warning("assign storage failed (cmd=0x%08x, " |
335 | "response=0x%04x, rn=0x%04x)\n", cmd, | |
336 | sccb->header.response_code, rn); | |
e0bc2495 HC |
337 | rc = -EIO; |
338 | break; | |
339 | } | |
340 | out: | |
341 | free_page((unsigned long) sccb); | |
342 | return rc; | |
343 | } | |
344 | ||
345 | static int sclp_assign_storage(u16 rn) | |
346 | { | |
347 | return do_assign_storage(0x000d0001, rn); | |
348 | } | |
349 | ||
350 | static int sclp_unassign_storage(u16 rn) | |
351 | { | |
352 | return do_assign_storage(0x000c0001, rn); | |
353 | } | |
354 | ||
355 | struct attach_storage_sccb { | |
356 | struct sccb_header header; | |
357 | u16 :16; | |
358 | u16 assigned; | |
359 | u32 :32; | |
360 | u32 entries[0]; | |
361 | } __packed; | |
362 | ||
363 | static int sclp_attach_storage(u8 id) | |
364 | { | |
365 | struct attach_storage_sccb *sccb; | |
366 | int rc; | |
367 | int i; | |
368 | ||
369 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
370 | if (!sccb) | |
371 | return -ENOMEM; | |
372 | sccb->header.length = PAGE_SIZE; | |
373 | rc = do_sync_request(0x00080001 | id << 8, sccb); | |
374 | if (rc) | |
375 | goto out; | |
376 | switch (sccb->header.response_code) { | |
377 | case 0x0020: | |
378 | set_bit(id, sclp_storage_ids); | |
379 | for (i = 0; i < sccb->assigned; i++) | |
380 | sclp_unassign_storage(sccb->entries[i] >> 16); | |
381 | break; | |
382 | default: | |
383 | rc = -EIO; | |
384 | break; | |
385 | } | |
386 | out: | |
387 | free_page((unsigned long) sccb); | |
388 | return rc; | |
389 | } | |
390 | ||
391 | static int sclp_mem_change_state(unsigned long start, unsigned long size, | |
392 | int online) | |
393 | { | |
394 | struct memory_increment *incr; | |
395 | unsigned long long istart; | |
396 | int rc = 0; | |
397 | ||
398 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
399 | istart = rn2addr(incr->rn); | |
400 | if (start + size - 1 < istart) | |
401 | break; | |
402 | if (start > istart + rzm - 1) | |
403 | continue; | |
404 | if (online) { | |
405 | if (incr->usecount++) | |
406 | continue; | |
407 | /* | |
408 | * Don't break the loop if one assign fails. Loop may | |
409 | * be walked again on CANCEL and we can't save | |
410 | * information if state changed before or not. | |
411 | * So continue and increase usecount for all increments. | |
412 | */ | |
413 | rc |= sclp_assign_storage(incr->rn); | |
414 | } else { | |
415 | if (--incr->usecount) | |
416 | continue; | |
417 | sclp_unassign_storage(incr->rn); | |
418 | } | |
419 | } | |
420 | return rc ? -EIO : 0; | |
421 | } | |
422 | ||
423 | static int sclp_mem_notifier(struct notifier_block *nb, | |
424 | unsigned long action, void *data) | |
425 | { | |
426 | unsigned long start, size; | |
427 | struct memory_notify *arg; | |
428 | unsigned char id; | |
429 | int rc = 0; | |
430 | ||
431 | arg = data; | |
432 | start = arg->start_pfn << PAGE_SHIFT; | |
433 | size = arg->nr_pages << PAGE_SHIFT; | |
434 | mutex_lock(&sclp_mem_mutex); | |
435 | for (id = 0; id <= sclp_max_storage_id; id++) | |
436 | if (!test_bit(id, sclp_storage_ids)) | |
437 | sclp_attach_storage(id); | |
438 | switch (action) { | |
439 | case MEM_ONLINE: | |
7e9238fb GS |
440 | case MEM_GOING_OFFLINE: |
441 | case MEM_CANCEL_OFFLINE: | |
e0bc2495 HC |
442 | break; |
443 | case MEM_GOING_ONLINE: | |
444 | rc = sclp_mem_change_state(start, size, 1); | |
445 | break; | |
446 | case MEM_CANCEL_ONLINE: | |
447 | sclp_mem_change_state(start, size, 0); | |
448 | break; | |
7e9238fb GS |
449 | case MEM_OFFLINE: |
450 | sclp_mem_change_state(start, size, 0); | |
451 | break; | |
e0bc2495 HC |
452 | default: |
453 | rc = -EINVAL; | |
454 | break; | |
455 | } | |
03997904 GS |
456 | if (!rc) |
457 | sclp_mem_state_changed = 1; | |
e0bc2495 HC |
458 | mutex_unlock(&sclp_mem_mutex); |
459 | return rc ? NOTIFY_BAD : NOTIFY_OK; | |
460 | } | |
461 | ||
462 | static struct notifier_block sclp_mem_nb = { | |
463 | .notifier_call = sclp_mem_notifier, | |
464 | }; | |
465 | ||
466 | static void __init add_memory_merged(u16 rn) | |
467 | { | |
468 | static u16 first_rn, num; | |
469 | unsigned long long start, size; | |
470 | ||
471 | if (rn && first_rn && (first_rn + num == rn)) { | |
472 | num++; | |
473 | return; | |
474 | } | |
475 | if (!first_rn) | |
476 | goto skip_add; | |
477 | start = rn2addr(first_rn); | |
478 | size = (unsigned long long ) num * rzm; | |
479 | if (start >= VMEM_MAX_PHYS) | |
480 | goto skip_add; | |
481 | if (start + size > VMEM_MAX_PHYS) | |
482 | size = VMEM_MAX_PHYS - start; | |
23d75d9c HC |
483 | if (memory_end_set && (start >= memory_end)) |
484 | goto skip_add; | |
485 | if (memory_end_set && (start + size > memory_end)) | |
486 | size = memory_end - start; | |
e0bc2495 HC |
487 | add_memory(0, start, size); |
488 | skip_add: | |
489 | first_rn = rn; | |
490 | num = 1; | |
491 | } | |
492 | ||
493 | static void __init sclp_add_standby_memory(void) | |
494 | { | |
495 | struct memory_increment *incr; | |
496 | ||
497 | list_for_each_entry(incr, &sclp_mem_list, list) | |
498 | if (incr->standby) | |
499 | add_memory_merged(incr->rn); | |
500 | add_memory_merged(0); | |
501 | } | |
502 | ||
503 | static void __init insert_increment(u16 rn, int standby, int assigned) | |
504 | { | |
505 | struct memory_increment *incr, *new_incr; | |
506 | struct list_head *prev; | |
507 | u16 last_rn; | |
508 | ||
509 | new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); | |
510 | if (!new_incr) | |
511 | return; | |
512 | new_incr->rn = rn; | |
513 | new_incr->standby = standby; | |
514 | last_rn = 0; | |
515 | prev = &sclp_mem_list; | |
516 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
517 | if (assigned && incr->rn > rn) | |
518 | break; | |
519 | if (!assigned && incr->rn - last_rn > 1) | |
520 | break; | |
521 | last_rn = incr->rn; | |
522 | prev = &incr->list; | |
523 | } | |
524 | if (!assigned) | |
525 | new_incr->rn = last_rn + 1; | |
526 | if (new_incr->rn > rnmax) { | |
527 | kfree(new_incr); | |
528 | return; | |
529 | } | |
530 | list_add(&new_incr->list, prev); | |
531 | } | |
532 | ||
03997904 GS |
533 | static int sclp_mem_freeze(struct device *dev) |
534 | { | |
535 | if (!sclp_mem_state_changed) | |
536 | return 0; | |
537 | pr_err("Memory hotplug state changed, suspend refused.\n"); | |
538 | return -EPERM; | |
539 | } | |
540 | ||
e0bc2495 HC |
541 | struct read_storage_sccb { |
542 | struct sccb_header header; | |
543 | u16 max_id; | |
544 | u16 assigned; | |
545 | u16 standby; | |
546 | u16 :16; | |
547 | u32 entries[0]; | |
548 | } __packed; | |
549 | ||
47145210 | 550 | static const struct dev_pm_ops sclp_mem_pm_ops = { |
03997904 GS |
551 | .freeze = sclp_mem_freeze, |
552 | }; | |
553 | ||
554 | static struct platform_driver sclp_mem_pdrv = { | |
555 | .driver = { | |
556 | .name = "sclp_mem", | |
557 | .pm = &sclp_mem_pm_ops, | |
558 | }, | |
559 | }; | |
560 | ||
e0bc2495 HC |
561 | static int __init sclp_detect_standby_memory(void) |
562 | { | |
03997904 | 563 | struct platform_device *sclp_pdev; |
e0bc2495 HC |
564 | struct read_storage_sccb *sccb; |
565 | int i, id, assigned, rc; | |
566 | ||
567 | if (!early_read_info_sccb_valid) | |
568 | return 0; | |
569 | if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) | |
570 | return 0; | |
571 | rc = -ENOMEM; | |
572 | sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); | |
573 | if (!sccb) | |
574 | goto out; | |
575 | assigned = 0; | |
576 | for (id = 0; id <= sclp_max_storage_id; id++) { | |
577 | memset(sccb, 0, PAGE_SIZE); | |
578 | sccb->header.length = PAGE_SIZE; | |
579 | rc = do_sync_request(0x00040001 | id << 8, sccb); | |
580 | if (rc) | |
581 | goto out; | |
582 | switch (sccb->header.response_code) { | |
583 | case 0x0010: | |
584 | set_bit(id, sclp_storage_ids); | |
585 | for (i = 0; i < sccb->assigned; i++) { | |
586 | if (!sccb->entries[i]) | |
587 | continue; | |
588 | assigned++; | |
589 | insert_increment(sccb->entries[i] >> 16, 0, 1); | |
590 | } | |
591 | break; | |
592 | case 0x0310: | |
593 | break; | |
594 | case 0x0410: | |
595 | for (i = 0; i < sccb->assigned; i++) { | |
596 | if (!sccb->entries[i]) | |
597 | continue; | |
598 | assigned++; | |
599 | insert_increment(sccb->entries[i] >> 16, 1, 1); | |
600 | } | |
601 | break; | |
602 | default: | |
603 | rc = -EIO; | |
604 | break; | |
605 | } | |
606 | if (!rc) | |
607 | sclp_max_storage_id = sccb->max_id; | |
608 | } | |
609 | if (rc || list_empty(&sclp_mem_list)) | |
610 | goto out; | |
611 | for (i = 1; i <= rnmax - assigned; i++) | |
612 | insert_increment(0, 1, 0); | |
613 | rc = register_memory_notifier(&sclp_mem_nb); | |
614 | if (rc) | |
615 | goto out; | |
03997904 GS |
616 | rc = platform_driver_register(&sclp_mem_pdrv); |
617 | if (rc) | |
618 | goto out; | |
619 | sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); | |
620 | rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0; | |
621 | if (rc) | |
622 | goto out_driver; | |
e0bc2495 | 623 | sclp_add_standby_memory(); |
03997904 GS |
624 | goto out; |
625 | out_driver: | |
626 | platform_driver_unregister(&sclp_mem_pdrv); | |
e0bc2495 HC |
627 | out: |
628 | free_page((unsigned long) sccb); | |
629 | return rc; | |
630 | } | |
631 | __initcall(sclp_detect_standby_memory); | |
632 | ||
633 | #endif /* CONFIG_MEMORY_HOTPLUG */ | |
634 | ||
4b28a8fe HC |
635 | /* |
636 | * Channel path configuration related functions. | |
637 | */ | |
638 | ||
639 | #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 | |
640 | #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 | |
641 | #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 | |
642 | ||
643 | struct chp_cfg_sccb { | |
644 | struct sccb_header header; | |
645 | u8 ccm; | |
646 | u8 reserved[6]; | |
647 | u8 cssid; | |
648 | } __attribute__((packed)); | |
649 | ||
650 | static int do_chp_configure(sclp_cmdw_t cmd) | |
651 | { | |
652 | struct chp_cfg_sccb *sccb; | |
653 | int rc; | |
654 | ||
655 | if (!SCLP_HAS_CHP_RECONFIG) | |
656 | return -EOPNOTSUPP; | |
657 | /* Prepare sccb. */ | |
658 | sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
659 | if (!sccb) | |
660 | return -ENOMEM; | |
661 | sccb->header.length = sizeof(*sccb); | |
662 | rc = do_sync_request(cmd, sccb); | |
663 | if (rc) | |
664 | goto out; | |
665 | switch (sccb->header.response_code) { | |
666 | case 0x0020: | |
667 | case 0x0120: | |
668 | case 0x0440: | |
669 | case 0x0450: | |
670 | break; | |
671 | default: | |
b3ff088b MS |
672 | pr_warning("configure channel-path failed " |
673 | "(cmd=0x%08x, response=0x%04x)\n", cmd, | |
674 | sccb->header.response_code); | |
4b28a8fe HC |
675 | rc = -EIO; |
676 | break; | |
677 | } | |
678 | out: | |
679 | free_page((unsigned long) sccb); | |
680 | return rc; | |
681 | } | |
682 | ||
683 | /** | |
684 | * sclp_chp_configure - perform configure channel-path sclp command | |
685 | * @chpid: channel-path ID | |
686 | * | |
687 | * Perform configure channel-path command sclp command for specified chpid. | |
688 | * Return 0 after command successfully finished, non-zero otherwise. | |
689 | */ | |
690 | int sclp_chp_configure(struct chp_id chpid) | |
691 | { | |
692 | return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); | |
693 | } | |
694 | ||
695 | /** | |
696 | * sclp_chp_deconfigure - perform deconfigure channel-path sclp command | |
697 | * @chpid: channel-path ID | |
698 | * | |
699 | * Perform deconfigure channel-path command sclp command for specified chpid | |
700 | * and wait for completion. On success return 0. Return non-zero otherwise. | |
701 | */ | |
702 | int sclp_chp_deconfigure(struct chp_id chpid) | |
703 | { | |
704 | return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); | |
705 | } | |
706 | ||
57b552ba HC |
707 | int arch_get_memory_phys_device(unsigned long start_pfn) |
708 | { | |
709 | if (!rzm) | |
710 | return 0; | |
711 | return PFN_PHYS(start_pfn) / rzm; | |
712 | } | |
713 | ||
4b28a8fe HC |
714 | struct chp_info_sccb { |
715 | struct sccb_header header; | |
716 | u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; | |
717 | u8 standby[SCLP_CHP_INFO_MASK_SIZE]; | |
718 | u8 configured[SCLP_CHP_INFO_MASK_SIZE]; | |
719 | u8 ccm; | |
720 | u8 reserved[6]; | |
721 | u8 cssid; | |
722 | } __attribute__((packed)); | |
723 | ||
724 | /** | |
725 | * sclp_chp_read_info - perform read channel-path information sclp command | |
726 | * @info: resulting channel-path information data | |
727 | * | |
728 | * Perform read channel-path information sclp command and wait for completion. | |
729 | * On success, store channel-path information in @info and return 0. Return | |
730 | * non-zero otherwise. | |
731 | */ | |
732 | int sclp_chp_read_info(struct sclp_chp_info *info) | |
733 | { | |
734 | struct chp_info_sccb *sccb; | |
735 | int rc; | |
736 | ||
737 | if (!SCLP_HAS_CHP_INFO) | |
738 | return -EOPNOTSUPP; | |
739 | /* Prepare sccb. */ | |
740 | sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
741 | if (!sccb) | |
742 | return -ENOMEM; | |
743 | sccb->header.length = sizeof(*sccb); | |
744 | rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); | |
745 | if (rc) | |
746 | goto out; | |
747 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
748 | pr_warning("read channel-path info failed " |
749 | "(response=0x%04x)\n", sccb->header.response_code); | |
4b28a8fe HC |
750 | rc = -EIO; |
751 | goto out; | |
752 | } | |
753 | memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); | |
754 | memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); | |
755 | memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); | |
756 | out: | |
757 | free_page((unsigned long) sccb); | |
758 | return rc; | |
759 | } |