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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> |
a0616cde | 24 | #include <asm/ctl_reg.h> |
08d07968 | 25 | |
b3ff088b | 26 | #include "sclp.h" |
08d07968 HC |
27 | |
28 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
29 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
30 | ||
31 | struct read_info_sccb { | |
32 | struct sccb_header header; /* 0-7 */ | |
33 | u16 rnmax; /* 8-9 */ | |
34 | u8 rnsize; /* 10 */ | |
35 | u8 _reserved0[24 - 11]; /* 11-15 */ | |
36 | u8 loadparm[8]; /* 24-31 */ | |
37 | u8 _reserved1[48 - 32]; /* 32-47 */ | |
38 | u64 facilities; /* 48-55 */ | |
39 | u8 _reserved2[84 - 56]; /* 56-83 */ | |
40 | u8 fac84; /* 84 */ | |
41 | u8 _reserved3[91 - 85]; /* 85-90 */ | |
42 | u8 flags; /* 91 */ | |
43 | u8 _reserved4[100 - 92]; /* 92-99 */ | |
44 | u32 rnsize2; /* 100-103 */ | |
45 | u64 rnmax2; /* 104-111 */ | |
46 | u8 _reserved5[4096 - 112]; /* 112-4095 */ | |
47 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
48 | ||
49 | static struct read_info_sccb __initdata early_read_info_sccb; | |
50 | static int __initdata early_read_info_sccb_valid; | |
51 | ||
52 | u64 sclp_facilities; | |
53 | static u8 sclp_fac84; | |
e0bc2495 HC |
54 | static unsigned long long rzm; |
55 | static unsigned long long rnmax; | |
08d07968 HC |
56 | |
57 | static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) | |
58 | { | |
59 | int rc; | |
60 | ||
61 | __ctl_set_bit(0, 9); | |
62 | rc = sclp_service_call(cmd, sccb); | |
63 | if (rc) | |
64 | goto out; | |
b50511e4 MS |
65 | __load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA | |
66 | PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT); | |
08d07968 HC |
67 | local_irq_disable(); |
68 | out: | |
69 | /* Contents of the sccb might have changed. */ | |
70 | barrier(); | |
71 | __ctl_clear_bit(0, 9); | |
72 | return rc; | |
73 | } | |
74 | ||
23d17421 | 75 | static void __init sclp_read_info_early(void) |
08d07968 HC |
76 | { |
77 | int rc; | |
78 | int i; | |
79 | struct read_info_sccb *sccb; | |
80 | sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, | |
81 | SCLP_CMDW_READ_SCP_INFO}; | |
82 | ||
83 | sccb = &early_read_info_sccb; | |
84 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
85 | do { | |
86 | memset(sccb, 0, sizeof(*sccb)); | |
87 | sccb->header.length = sizeof(*sccb); | |
cb9d7160 | 88 | sccb->header.function_code = 0x80; |
08d07968 HC |
89 | sccb->header.control_mask[2] = 0x80; |
90 | rc = sclp_cmd_sync_early(commands[i], sccb); | |
91 | } while (rc == -EBUSY); | |
92 | ||
93 | if (rc) | |
94 | break; | |
95 | if (sccb->header.response_code == 0x10) { | |
96 | early_read_info_sccb_valid = 1; | |
97 | break; | |
98 | } | |
99 | if (sccb->header.response_code != 0x1f0) | |
100 | break; | |
101 | } | |
102 | } | |
103 | ||
104 | void __init sclp_facilities_detect(void) | |
105 | { | |
08d07968 HC |
106 | struct read_info_sccb *sccb; |
107 | ||
23d17421 | 108 | sclp_read_info_early(); |
08d07968 | 109 | if (!early_read_info_sccb_valid) |
23d17421 HC |
110 | return; |
111 | ||
08d07968 | 112 | sccb = &early_read_info_sccb; |
23d17421 HC |
113 | sclp_facilities = sccb->facilities; |
114 | sclp_fac84 = sccb->fac84; | |
e0bc2495 HC |
115 | rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; |
116 | rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; | |
117 | rzm <<= 20; | |
23d17421 HC |
118 | } |
119 | ||
120 | unsigned long long sclp_get_rnmax(void) | |
121 | { | |
122 | return rnmax; | |
123 | } | |
124 | ||
125 | unsigned long long sclp_get_rzm(void) | |
126 | { | |
127 | return rzm; | |
08d07968 HC |
128 | } |
129 | ||
130 | /* | |
23d17421 HC |
131 | * This function will be called after sclp_facilities_detect(), which gets |
132 | * called from early.c code. Therefore the sccb should have valid contents. | |
08d07968 HC |
133 | */ |
134 | void __init sclp_get_ipl_info(struct sclp_ipl_info *info) | |
135 | { | |
136 | struct read_info_sccb *sccb; | |
137 | ||
138 | if (!early_read_info_sccb_valid) | |
139 | return; | |
140 | sccb = &early_read_info_sccb; | |
141 | info->is_valid = 1; | |
142 | if (sccb->flags & 0x2) | |
143 | info->has_dump = 1; | |
144 | memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); | |
145 | } | |
146 | ||
147 | static void sclp_sync_callback(struct sclp_req *req, void *data) | |
148 | { | |
149 | struct completion *completion = data; | |
150 | ||
151 | complete(completion); | |
152 | } | |
153 | ||
154 | static int do_sync_request(sclp_cmdw_t cmd, void *sccb) | |
155 | { | |
156 | struct completion completion; | |
157 | struct sclp_req *request; | |
158 | int rc; | |
159 | ||
160 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
161 | if (!request) | |
162 | return -ENOMEM; | |
163 | request->command = cmd; | |
164 | request->sccb = sccb; | |
165 | request->status = SCLP_REQ_FILLED; | |
166 | request->callback = sclp_sync_callback; | |
167 | request->callback_data = &completion; | |
168 | init_completion(&completion); | |
169 | ||
170 | /* Perform sclp request. */ | |
171 | rc = sclp_add_request(request); | |
172 | if (rc) | |
173 | goto out; | |
174 | wait_for_completion(&completion); | |
175 | ||
176 | /* Check response. */ | |
177 | if (request->status != SCLP_REQ_DONE) { | |
b3ff088b MS |
178 | pr_warning("sync request failed (cmd=0x%08x, " |
179 | "status=0x%02x)\n", cmd, request->status); | |
08d07968 HC |
180 | rc = -EIO; |
181 | } | |
182 | out: | |
183 | kfree(request); | |
184 | return rc; | |
185 | } | |
186 | ||
187 | /* | |
188 | * CPU configuration related functions. | |
189 | */ | |
190 | ||
191 | #define SCLP_CMDW_READ_CPU_INFO 0x00010001 | |
192 | #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 | |
193 | #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 | |
194 | ||
195 | struct read_cpu_info_sccb { | |
196 | struct sccb_header header; | |
197 | u16 nr_configured; | |
198 | u16 offset_configured; | |
199 | u16 nr_standby; | |
200 | u16 offset_standby; | |
201 | u8 reserved[4096 - 16]; | |
202 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
203 | ||
08d07968 HC |
204 | static void sclp_fill_cpu_info(struct sclp_cpu_info *info, |
205 | struct read_cpu_info_sccb *sccb) | |
206 | { | |
207 | char *page = (char *) sccb; | |
208 | ||
209 | memset(info, 0, sizeof(*info)); | |
210 | info->configured = sccb->nr_configured; | |
211 | info->standby = sccb->nr_standby; | |
212 | info->combined = sccb->nr_configured + sccb->nr_standby; | |
213 | info->has_cpu_type = sclp_fac84 & 0x1; | |
214 | memcpy(&info->cpu, page + sccb->offset_configured, | |
215 | info->combined * sizeof(struct sclp_cpu_entry)); | |
216 | } | |
217 | ||
48483b32 | 218 | int sclp_get_cpu_info(struct sclp_cpu_info *info) |
08d07968 HC |
219 | { |
220 | int rc; | |
221 | struct read_cpu_info_sccb *sccb; | |
222 | ||
223 | if (!SCLP_HAS_CPU_INFO) | |
224 | return -EOPNOTSUPP; | |
48483b32 | 225 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
08d07968 HC |
226 | if (!sccb) |
227 | return -ENOMEM; | |
08d07968 HC |
228 | sccb->header.length = sizeof(*sccb); |
229 | rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb); | |
230 | if (rc) | |
231 | goto out; | |
232 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
233 | pr_warning("readcpuinfo failed (response=0x%04x)\n", |
234 | sccb->header.response_code); | |
08d07968 HC |
235 | rc = -EIO; |
236 | goto out; | |
237 | } | |
238 | sclp_fill_cpu_info(info, sccb); | |
239 | out: | |
240 | free_page((unsigned long) sccb); | |
241 | return rc; | |
242 | } | |
243 | ||
08d07968 HC |
244 | struct cpu_configure_sccb { |
245 | struct sccb_header header; | |
246 | } __attribute__((packed, aligned(8))); | |
247 | ||
248 | static int do_cpu_configure(sclp_cmdw_t cmd) | |
249 | { | |
250 | struct cpu_configure_sccb *sccb; | |
251 | int rc; | |
252 | ||
253 | if (!SCLP_HAS_CPU_RECONFIG) | |
254 | return -EOPNOTSUPP; | |
255 | /* | |
256 | * This is not going to cross a page boundary since we force | |
257 | * kmalloc to have a minimum alignment of 8 bytes on s390. | |
258 | */ | |
259 | sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); | |
260 | if (!sccb) | |
261 | return -ENOMEM; | |
262 | sccb->header.length = sizeof(*sccb); | |
263 | rc = do_sync_request(cmd, sccb); | |
264 | if (rc) | |
265 | goto out; | |
266 | switch (sccb->header.response_code) { | |
267 | case 0x0020: | |
268 | case 0x0120: | |
269 | break; | |
270 | default: | |
b3ff088b MS |
271 | pr_warning("configure cpu failed (cmd=0x%08x, " |
272 | "response=0x%04x)\n", cmd, | |
273 | sccb->header.response_code); | |
08d07968 HC |
274 | rc = -EIO; |
275 | break; | |
276 | } | |
277 | out: | |
278 | kfree(sccb); | |
279 | return rc; | |
280 | } | |
281 | ||
282 | int sclp_cpu_configure(u8 cpu) | |
283 | { | |
284 | return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); | |
285 | } | |
286 | ||
287 | int sclp_cpu_deconfigure(u8 cpu) | |
288 | { | |
289 | return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); | |
290 | } | |
4b28a8fe | 291 | |
e0bc2495 HC |
292 | #ifdef CONFIG_MEMORY_HOTPLUG |
293 | ||
294 | static DEFINE_MUTEX(sclp_mem_mutex); | |
295 | static LIST_HEAD(sclp_mem_list); | |
296 | static u8 sclp_max_storage_id; | |
297 | static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; | |
03997904 | 298 | static int sclp_mem_state_changed; |
e0bc2495 HC |
299 | |
300 | struct memory_increment { | |
301 | struct list_head list; | |
302 | u16 rn; | |
303 | int standby; | |
304 | int usecount; | |
305 | }; | |
306 | ||
307 | struct assign_storage_sccb { | |
308 | struct sccb_header header; | |
309 | u16 rn; | |
310 | } __packed; | |
311 | ||
9c95258c HC |
312 | int arch_get_memory_phys_device(unsigned long start_pfn) |
313 | { | |
314 | if (!rzm) | |
315 | return 0; | |
316 | return PFN_PHYS(start_pfn) >> ilog2(rzm); | |
317 | } | |
318 | ||
e0bc2495 HC |
319 | static unsigned long long rn2addr(u16 rn) |
320 | { | |
321 | return (unsigned long long) (rn - 1) * rzm; | |
322 | } | |
323 | ||
324 | static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) | |
325 | { | |
326 | struct assign_storage_sccb *sccb; | |
327 | int rc; | |
328 | ||
329 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
330 | if (!sccb) | |
331 | return -ENOMEM; | |
332 | sccb->header.length = PAGE_SIZE; | |
333 | sccb->rn = rn; | |
334 | rc = do_sync_request(cmd, sccb); | |
335 | if (rc) | |
336 | goto out; | |
337 | switch (sccb->header.response_code) { | |
338 | case 0x0020: | |
339 | case 0x0120: | |
340 | break; | |
341 | default: | |
675be97a HC |
342 | pr_warning("assign storage failed (cmd=0x%08x, " |
343 | "response=0x%04x, rn=0x%04x)\n", cmd, | |
344 | sccb->header.response_code, rn); | |
e0bc2495 HC |
345 | rc = -EIO; |
346 | break; | |
347 | } | |
348 | out: | |
349 | free_page((unsigned long) sccb); | |
350 | return rc; | |
351 | } | |
352 | ||
353 | static int sclp_assign_storage(u16 rn) | |
354 | { | |
355 | return do_assign_storage(0x000d0001, rn); | |
356 | } | |
357 | ||
358 | static int sclp_unassign_storage(u16 rn) | |
359 | { | |
360 | return do_assign_storage(0x000c0001, rn); | |
361 | } | |
362 | ||
363 | struct attach_storage_sccb { | |
364 | struct sccb_header header; | |
365 | u16 :16; | |
366 | u16 assigned; | |
367 | u32 :32; | |
368 | u32 entries[0]; | |
369 | } __packed; | |
370 | ||
371 | static int sclp_attach_storage(u8 id) | |
372 | { | |
373 | struct attach_storage_sccb *sccb; | |
374 | int rc; | |
375 | int i; | |
376 | ||
377 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
378 | if (!sccb) | |
379 | return -ENOMEM; | |
380 | sccb->header.length = PAGE_SIZE; | |
381 | rc = do_sync_request(0x00080001 | id << 8, sccb); | |
382 | if (rc) | |
383 | goto out; | |
384 | switch (sccb->header.response_code) { | |
385 | case 0x0020: | |
386 | set_bit(id, sclp_storage_ids); | |
8adb4ca3 HC |
387 | for (i = 0; i < sccb->assigned; i++) { |
388 | if (sccb->entries[i]) | |
389 | sclp_unassign_storage(sccb->entries[i] >> 16); | |
390 | } | |
e0bc2495 HC |
391 | break; |
392 | default: | |
393 | rc = -EIO; | |
394 | break; | |
395 | } | |
396 | out: | |
397 | free_page((unsigned long) sccb); | |
398 | return rc; | |
399 | } | |
400 | ||
401 | static int sclp_mem_change_state(unsigned long start, unsigned long size, | |
402 | int online) | |
403 | { | |
404 | struct memory_increment *incr; | |
405 | unsigned long long istart; | |
406 | int rc = 0; | |
407 | ||
408 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
409 | istart = rn2addr(incr->rn); | |
410 | if (start + size - 1 < istart) | |
411 | break; | |
412 | if (start > istart + rzm - 1) | |
413 | continue; | |
414 | if (online) { | |
415 | if (incr->usecount++) | |
416 | continue; | |
417 | /* | |
418 | * Don't break the loop if one assign fails. Loop may | |
419 | * be walked again on CANCEL and we can't save | |
420 | * information if state changed before or not. | |
421 | * So continue and increase usecount for all increments. | |
422 | */ | |
423 | rc |= sclp_assign_storage(incr->rn); | |
424 | } else { | |
425 | if (--incr->usecount) | |
426 | continue; | |
427 | sclp_unassign_storage(incr->rn); | |
428 | } | |
429 | } | |
430 | return rc ? -EIO : 0; | |
431 | } | |
432 | ||
433 | static int sclp_mem_notifier(struct notifier_block *nb, | |
434 | unsigned long action, void *data) | |
435 | { | |
436 | unsigned long start, size; | |
437 | struct memory_notify *arg; | |
438 | unsigned char id; | |
439 | int rc = 0; | |
440 | ||
441 | arg = data; | |
442 | start = arg->start_pfn << PAGE_SHIFT; | |
443 | size = arg->nr_pages << PAGE_SHIFT; | |
444 | mutex_lock(&sclp_mem_mutex); | |
fc89db4b AM |
445 | for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) |
446 | sclp_attach_storage(id); | |
e0bc2495 HC |
447 | switch (action) { |
448 | case MEM_ONLINE: | |
7e9238fb GS |
449 | case MEM_GOING_OFFLINE: |
450 | case MEM_CANCEL_OFFLINE: | |
e0bc2495 HC |
451 | break; |
452 | case MEM_GOING_ONLINE: | |
453 | rc = sclp_mem_change_state(start, size, 1); | |
454 | break; | |
455 | case MEM_CANCEL_ONLINE: | |
456 | sclp_mem_change_state(start, size, 0); | |
457 | break; | |
7e9238fb GS |
458 | case MEM_OFFLINE: |
459 | sclp_mem_change_state(start, size, 0); | |
460 | break; | |
e0bc2495 HC |
461 | default: |
462 | rc = -EINVAL; | |
463 | break; | |
464 | } | |
03997904 GS |
465 | if (!rc) |
466 | sclp_mem_state_changed = 1; | |
e0bc2495 HC |
467 | mutex_unlock(&sclp_mem_mutex); |
468 | return rc ? NOTIFY_BAD : NOTIFY_OK; | |
469 | } | |
470 | ||
471 | static struct notifier_block sclp_mem_nb = { | |
472 | .notifier_call = sclp_mem_notifier, | |
473 | }; | |
474 | ||
475 | static void __init add_memory_merged(u16 rn) | |
476 | { | |
477 | static u16 first_rn, num; | |
478 | unsigned long long start, size; | |
479 | ||
480 | if (rn && first_rn && (first_rn + num == rn)) { | |
481 | num++; | |
482 | return; | |
483 | } | |
484 | if (!first_rn) | |
485 | goto skip_add; | |
486 | start = rn2addr(first_rn); | |
487 | size = (unsigned long long ) num * rzm; | |
488 | if (start >= VMEM_MAX_PHYS) | |
489 | goto skip_add; | |
490 | if (start + size > VMEM_MAX_PHYS) | |
491 | size = VMEM_MAX_PHYS - start; | |
23d75d9c HC |
492 | if (memory_end_set && (start >= memory_end)) |
493 | goto skip_add; | |
494 | if (memory_end_set && (start + size > memory_end)) | |
495 | size = memory_end - start; | |
e0bc2495 HC |
496 | add_memory(0, start, size); |
497 | skip_add: | |
498 | first_rn = rn; | |
499 | num = 1; | |
500 | } | |
501 | ||
502 | static void __init sclp_add_standby_memory(void) | |
503 | { | |
504 | struct memory_increment *incr; | |
505 | ||
506 | list_for_each_entry(incr, &sclp_mem_list, list) | |
507 | if (incr->standby) | |
508 | add_memory_merged(incr->rn); | |
509 | add_memory_merged(0); | |
510 | } | |
511 | ||
512 | static void __init insert_increment(u16 rn, int standby, int assigned) | |
513 | { | |
514 | struct memory_increment *incr, *new_incr; | |
515 | struct list_head *prev; | |
516 | u16 last_rn; | |
517 | ||
518 | new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); | |
519 | if (!new_incr) | |
520 | return; | |
521 | new_incr->rn = rn; | |
522 | new_incr->standby = standby; | |
fdb1bb15 HC |
523 | if (!standby) |
524 | new_incr->usecount = 1; | |
e0bc2495 HC |
525 | last_rn = 0; |
526 | prev = &sclp_mem_list; | |
527 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
528 | if (assigned && incr->rn > rn) | |
529 | break; | |
530 | if (!assigned && incr->rn - last_rn > 1) | |
531 | break; | |
532 | last_rn = incr->rn; | |
533 | prev = &incr->list; | |
534 | } | |
535 | if (!assigned) | |
536 | new_incr->rn = last_rn + 1; | |
537 | if (new_incr->rn > rnmax) { | |
538 | kfree(new_incr); | |
539 | return; | |
540 | } | |
541 | list_add(&new_incr->list, prev); | |
542 | } | |
543 | ||
03997904 GS |
544 | static int sclp_mem_freeze(struct device *dev) |
545 | { | |
546 | if (!sclp_mem_state_changed) | |
547 | return 0; | |
548 | pr_err("Memory hotplug state changed, suspend refused.\n"); | |
549 | return -EPERM; | |
550 | } | |
551 | ||
e0bc2495 HC |
552 | struct read_storage_sccb { |
553 | struct sccb_header header; | |
554 | u16 max_id; | |
555 | u16 assigned; | |
556 | u16 standby; | |
557 | u16 :16; | |
558 | u32 entries[0]; | |
559 | } __packed; | |
560 | ||
47145210 | 561 | static const struct dev_pm_ops sclp_mem_pm_ops = { |
03997904 GS |
562 | .freeze = sclp_mem_freeze, |
563 | }; | |
564 | ||
565 | static struct platform_driver sclp_mem_pdrv = { | |
566 | .driver = { | |
567 | .name = "sclp_mem", | |
568 | .pm = &sclp_mem_pm_ops, | |
569 | }, | |
570 | }; | |
571 | ||
e0bc2495 HC |
572 | static int __init sclp_detect_standby_memory(void) |
573 | { | |
03997904 | 574 | struct platform_device *sclp_pdev; |
e0bc2495 HC |
575 | struct read_storage_sccb *sccb; |
576 | int i, id, assigned, rc; | |
577 | ||
578 | if (!early_read_info_sccb_valid) | |
579 | return 0; | |
580 | if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) | |
581 | return 0; | |
582 | rc = -ENOMEM; | |
583 | sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); | |
584 | if (!sccb) | |
585 | goto out; | |
586 | assigned = 0; | |
587 | for (id = 0; id <= sclp_max_storage_id; id++) { | |
588 | memset(sccb, 0, PAGE_SIZE); | |
589 | sccb->header.length = PAGE_SIZE; | |
590 | rc = do_sync_request(0x00040001 | id << 8, sccb); | |
591 | if (rc) | |
592 | goto out; | |
593 | switch (sccb->header.response_code) { | |
594 | case 0x0010: | |
595 | set_bit(id, sclp_storage_ids); | |
596 | for (i = 0; i < sccb->assigned; i++) { | |
597 | if (!sccb->entries[i]) | |
598 | continue; | |
599 | assigned++; | |
600 | insert_increment(sccb->entries[i] >> 16, 0, 1); | |
601 | } | |
602 | break; | |
603 | case 0x0310: | |
604 | break; | |
605 | case 0x0410: | |
606 | for (i = 0; i < sccb->assigned; i++) { | |
607 | if (!sccb->entries[i]) | |
608 | continue; | |
609 | assigned++; | |
610 | insert_increment(sccb->entries[i] >> 16, 1, 1); | |
611 | } | |
612 | break; | |
613 | default: | |
614 | rc = -EIO; | |
615 | break; | |
616 | } | |
617 | if (!rc) | |
618 | sclp_max_storage_id = sccb->max_id; | |
619 | } | |
620 | if (rc || list_empty(&sclp_mem_list)) | |
621 | goto out; | |
622 | for (i = 1; i <= rnmax - assigned; i++) | |
623 | insert_increment(0, 1, 0); | |
624 | rc = register_memory_notifier(&sclp_mem_nb); | |
625 | if (rc) | |
626 | goto out; | |
03997904 GS |
627 | rc = platform_driver_register(&sclp_mem_pdrv); |
628 | if (rc) | |
629 | goto out; | |
630 | sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); | |
631 | rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0; | |
632 | if (rc) | |
633 | goto out_driver; | |
e0bc2495 | 634 | sclp_add_standby_memory(); |
03997904 GS |
635 | goto out; |
636 | out_driver: | |
637 | platform_driver_unregister(&sclp_mem_pdrv); | |
e0bc2495 HC |
638 | out: |
639 | free_page((unsigned long) sccb); | |
640 | return rc; | |
641 | } | |
642 | __initcall(sclp_detect_standby_memory); | |
643 | ||
644 | #endif /* CONFIG_MEMORY_HOTPLUG */ | |
645 | ||
4b28a8fe HC |
646 | /* |
647 | * Channel path configuration related functions. | |
648 | */ | |
649 | ||
650 | #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 | |
651 | #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 | |
652 | #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 | |
653 | ||
654 | struct chp_cfg_sccb { | |
655 | struct sccb_header header; | |
656 | u8 ccm; | |
657 | u8 reserved[6]; | |
658 | u8 cssid; | |
659 | } __attribute__((packed)); | |
660 | ||
661 | static int do_chp_configure(sclp_cmdw_t cmd) | |
662 | { | |
663 | struct chp_cfg_sccb *sccb; | |
664 | int rc; | |
665 | ||
666 | if (!SCLP_HAS_CHP_RECONFIG) | |
667 | return -EOPNOTSUPP; | |
668 | /* Prepare sccb. */ | |
669 | sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
670 | if (!sccb) | |
671 | return -ENOMEM; | |
672 | sccb->header.length = sizeof(*sccb); | |
673 | rc = do_sync_request(cmd, sccb); | |
674 | if (rc) | |
675 | goto out; | |
676 | switch (sccb->header.response_code) { | |
677 | case 0x0020: | |
678 | case 0x0120: | |
679 | case 0x0440: | |
680 | case 0x0450: | |
681 | break; | |
682 | default: | |
b3ff088b MS |
683 | pr_warning("configure channel-path failed " |
684 | "(cmd=0x%08x, response=0x%04x)\n", cmd, | |
685 | sccb->header.response_code); | |
4b28a8fe HC |
686 | rc = -EIO; |
687 | break; | |
688 | } | |
689 | out: | |
690 | free_page((unsigned long) sccb); | |
691 | return rc; | |
692 | } | |
693 | ||
694 | /** | |
695 | * sclp_chp_configure - perform configure channel-path sclp command | |
696 | * @chpid: channel-path ID | |
697 | * | |
698 | * Perform configure channel-path command sclp command for specified chpid. | |
699 | * Return 0 after command successfully finished, non-zero otherwise. | |
700 | */ | |
701 | int sclp_chp_configure(struct chp_id chpid) | |
702 | { | |
703 | return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); | |
704 | } | |
705 | ||
706 | /** | |
707 | * sclp_chp_deconfigure - perform deconfigure channel-path sclp command | |
708 | * @chpid: channel-path ID | |
709 | * | |
710 | * Perform deconfigure channel-path command sclp command for specified chpid | |
711 | * and wait for completion. On success return 0. Return non-zero otherwise. | |
712 | */ | |
713 | int sclp_chp_deconfigure(struct chp_id chpid) | |
714 | { | |
715 | return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); | |
716 | } | |
717 | ||
718 | struct chp_info_sccb { | |
719 | struct sccb_header header; | |
720 | u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; | |
721 | u8 standby[SCLP_CHP_INFO_MASK_SIZE]; | |
722 | u8 configured[SCLP_CHP_INFO_MASK_SIZE]; | |
723 | u8 ccm; | |
724 | u8 reserved[6]; | |
725 | u8 cssid; | |
726 | } __attribute__((packed)); | |
727 | ||
728 | /** | |
729 | * sclp_chp_read_info - perform read channel-path information sclp command | |
730 | * @info: resulting channel-path information data | |
731 | * | |
732 | * Perform read channel-path information sclp command and wait for completion. | |
733 | * On success, store channel-path information in @info and return 0. Return | |
734 | * non-zero otherwise. | |
735 | */ | |
736 | int sclp_chp_read_info(struct sclp_chp_info *info) | |
737 | { | |
738 | struct chp_info_sccb *sccb; | |
739 | int rc; | |
740 | ||
741 | if (!SCLP_HAS_CHP_INFO) | |
742 | return -EOPNOTSUPP; | |
743 | /* Prepare sccb. */ | |
744 | sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
745 | if (!sccb) | |
746 | return -ENOMEM; | |
747 | sccb->header.length = sizeof(*sccb); | |
748 | rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); | |
749 | if (rc) | |
750 | goto out; | |
751 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
752 | pr_warning("read channel-path info failed " |
753 | "(response=0x%04x)\n", sccb->header.response_code); | |
4b28a8fe HC |
754 | rc = -EIO; |
755 | goto out; | |
756 | } | |
757 | memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); | |
758 | memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); | |
759 | memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); | |
760 | out: | |
761 | free_page((unsigned long) sccb); | |
762 | return rc; | |
763 | } |