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> | |
1526bf9c | 20 | #include <linux/module.h> |
03997904 | 21 | #include <linux/platform_device.h> |
4b28a8fe | 22 | #include <asm/chpid.h> |
08d07968 | 23 | #include <asm/sclp.h> |
23d75d9c | 24 | #include <asm/setup.h> |
a0616cde | 25 | #include <asm/ctl_reg.h> |
08d07968 | 26 | |
b3ff088b | 27 | #include "sclp.h" |
08d07968 HC |
28 | |
29 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
30 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
31 | ||
32 | struct read_info_sccb { | |
33 | struct sccb_header header; /* 0-7 */ | |
34 | u16 rnmax; /* 8-9 */ | |
35 | u8 rnsize; /* 10 */ | |
36 | u8 _reserved0[24 - 11]; /* 11-15 */ | |
37 | u8 loadparm[8]; /* 24-31 */ | |
38 | u8 _reserved1[48 - 32]; /* 32-47 */ | |
39 | u64 facilities; /* 48-55 */ | |
40 | u8 _reserved2[84 - 56]; /* 56-83 */ | |
41 | u8 fac84; /* 84 */ | |
1526bf9c CB |
42 | u8 fac85; /* 85 */ |
43 | u8 _reserved3[91 - 86]; /* 86-90 */ | |
08d07968 HC |
44 | u8 flags; /* 91 */ |
45 | u8 _reserved4[100 - 92]; /* 92-99 */ | |
46 | u32 rnsize2; /* 100-103 */ | |
47 | u64 rnmax2; /* 104-111 */ | |
48 | u8 _reserved5[4096 - 112]; /* 112-4095 */ | |
49 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
50 | ||
cd183459 | 51 | static struct init_sccb __initdata early_event_mask_sccb __aligned(PAGE_SIZE); |
08d07968 HC |
52 | static struct read_info_sccb __initdata early_read_info_sccb; |
53 | static int __initdata early_read_info_sccb_valid; | |
54 | ||
55 | u64 sclp_facilities; | |
56 | static u8 sclp_fac84; | |
1526bf9c | 57 | static u8 sclp_fac85; |
e0bc2495 HC |
58 | static unsigned long long rzm; |
59 | static unsigned long long rnmax; | |
08d07968 HC |
60 | |
61 | static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) | |
62 | { | |
63 | int rc; | |
64 | ||
65 | __ctl_set_bit(0, 9); | |
66 | rc = sclp_service_call(cmd, sccb); | |
67 | if (rc) | |
68 | goto out; | |
b50511e4 MS |
69 | __load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA | |
70 | PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT); | |
08d07968 HC |
71 | local_irq_disable(); |
72 | out: | |
73 | /* Contents of the sccb might have changed. */ | |
74 | barrier(); | |
75 | __ctl_clear_bit(0, 9); | |
76 | return rc; | |
77 | } | |
78 | ||
23d17421 | 79 | static void __init sclp_read_info_early(void) |
08d07968 HC |
80 | { |
81 | int rc; | |
82 | int i; | |
83 | struct read_info_sccb *sccb; | |
84 | sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, | |
85 | SCLP_CMDW_READ_SCP_INFO}; | |
86 | ||
87 | sccb = &early_read_info_sccb; | |
88 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
89 | do { | |
90 | memset(sccb, 0, sizeof(*sccb)); | |
91 | sccb->header.length = sizeof(*sccb); | |
cb9d7160 | 92 | sccb->header.function_code = 0x80; |
08d07968 HC |
93 | sccb->header.control_mask[2] = 0x80; |
94 | rc = sclp_cmd_sync_early(commands[i], sccb); | |
95 | } while (rc == -EBUSY); | |
96 | ||
97 | if (rc) | |
98 | break; | |
99 | if (sccb->header.response_code == 0x10) { | |
100 | early_read_info_sccb_valid = 1; | |
101 | break; | |
102 | } | |
103 | if (sccb->header.response_code != 0x1f0) | |
104 | break; | |
105 | } | |
106 | } | |
107 | ||
cd183459 HG |
108 | static void __init sclp_event_mask_early(void) |
109 | { | |
110 | struct init_sccb *sccb = &early_event_mask_sccb; | |
111 | int rc; | |
112 | ||
113 | do { | |
114 | memset(sccb, 0, sizeof(*sccb)); | |
115 | sccb->header.length = sizeof(*sccb); | |
116 | sccb->mask_length = sizeof(sccb_mask_t); | |
117 | rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb); | |
118 | } while (rc == -EBUSY); | |
119 | } | |
120 | ||
08d07968 HC |
121 | void __init sclp_facilities_detect(void) |
122 | { | |
08d07968 HC |
123 | struct read_info_sccb *sccb; |
124 | ||
23d17421 | 125 | sclp_read_info_early(); |
08d07968 | 126 | if (!early_read_info_sccb_valid) |
23d17421 HC |
127 | return; |
128 | ||
08d07968 | 129 | sccb = &early_read_info_sccb; |
23d17421 HC |
130 | sclp_facilities = sccb->facilities; |
131 | sclp_fac84 = sccb->fac84; | |
1526bf9c | 132 | sclp_fac85 = sccb->fac85; |
e0bc2495 HC |
133 | rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; |
134 | rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; | |
135 | rzm <<= 20; | |
cd183459 HG |
136 | |
137 | sclp_event_mask_early(); | |
138 | } | |
139 | ||
140 | bool __init sclp_has_linemode(void) | |
141 | { | |
142 | struct init_sccb *sccb = &early_event_mask_sccb; | |
143 | ||
144 | if (sccb->header.response_code != 0x20) | |
145 | return 0; | |
146 | if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)) | |
147 | return 1; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | bool __init sclp_has_vt220(void) | |
152 | { | |
153 | struct init_sccb *sccb = &early_event_mask_sccb; | |
154 | ||
155 | if (sccb->header.response_code != 0x20) | |
156 | return 0; | |
157 | if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK) | |
158 | return 1; | |
159 | return 0; | |
23d17421 HC |
160 | } |
161 | ||
162 | unsigned long long sclp_get_rnmax(void) | |
163 | { | |
164 | return rnmax; | |
165 | } | |
166 | ||
167 | unsigned long long sclp_get_rzm(void) | |
168 | { | |
169 | return rzm; | |
08d07968 HC |
170 | } |
171 | ||
1526bf9c CB |
172 | u8 sclp_get_fac85(void) |
173 | { | |
174 | return sclp_fac85; | |
175 | } | |
176 | EXPORT_SYMBOL_GPL(sclp_get_fac85); | |
177 | ||
08d07968 | 178 | /* |
23d17421 HC |
179 | * This function will be called after sclp_facilities_detect(), which gets |
180 | * called from early.c code. Therefore the sccb should have valid contents. | |
08d07968 HC |
181 | */ |
182 | void __init sclp_get_ipl_info(struct sclp_ipl_info *info) | |
183 | { | |
184 | struct read_info_sccb *sccb; | |
185 | ||
186 | if (!early_read_info_sccb_valid) | |
187 | return; | |
188 | sccb = &early_read_info_sccb; | |
189 | info->is_valid = 1; | |
190 | if (sccb->flags & 0x2) | |
191 | info->has_dump = 1; | |
192 | memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); | |
193 | } | |
194 | ||
195 | static void sclp_sync_callback(struct sclp_req *req, void *data) | |
196 | { | |
197 | struct completion *completion = data; | |
198 | ||
199 | complete(completion); | |
200 | } | |
201 | ||
202 | static int do_sync_request(sclp_cmdw_t cmd, void *sccb) | |
203 | { | |
204 | struct completion completion; | |
205 | struct sclp_req *request; | |
206 | int rc; | |
207 | ||
208 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
209 | if (!request) | |
210 | return -ENOMEM; | |
211 | request->command = cmd; | |
212 | request->sccb = sccb; | |
213 | request->status = SCLP_REQ_FILLED; | |
214 | request->callback = sclp_sync_callback; | |
215 | request->callback_data = &completion; | |
216 | init_completion(&completion); | |
217 | ||
218 | /* Perform sclp request. */ | |
219 | rc = sclp_add_request(request); | |
220 | if (rc) | |
221 | goto out; | |
222 | wait_for_completion(&completion); | |
223 | ||
224 | /* Check response. */ | |
225 | if (request->status != SCLP_REQ_DONE) { | |
b3ff088b MS |
226 | pr_warning("sync request failed (cmd=0x%08x, " |
227 | "status=0x%02x)\n", cmd, request->status); | |
08d07968 HC |
228 | rc = -EIO; |
229 | } | |
230 | out: | |
231 | kfree(request); | |
232 | return rc; | |
233 | } | |
234 | ||
235 | /* | |
236 | * CPU configuration related functions. | |
237 | */ | |
238 | ||
239 | #define SCLP_CMDW_READ_CPU_INFO 0x00010001 | |
240 | #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 | |
241 | #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 | |
242 | ||
243 | struct read_cpu_info_sccb { | |
244 | struct sccb_header header; | |
245 | u16 nr_configured; | |
246 | u16 offset_configured; | |
247 | u16 nr_standby; | |
248 | u16 offset_standby; | |
249 | u8 reserved[4096 - 16]; | |
250 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
251 | ||
08d07968 HC |
252 | static void sclp_fill_cpu_info(struct sclp_cpu_info *info, |
253 | struct read_cpu_info_sccb *sccb) | |
254 | { | |
255 | char *page = (char *) sccb; | |
256 | ||
257 | memset(info, 0, sizeof(*info)); | |
258 | info->configured = sccb->nr_configured; | |
259 | info->standby = sccb->nr_standby; | |
260 | info->combined = sccb->nr_configured + sccb->nr_standby; | |
261 | info->has_cpu_type = sclp_fac84 & 0x1; | |
262 | memcpy(&info->cpu, page + sccb->offset_configured, | |
263 | info->combined * sizeof(struct sclp_cpu_entry)); | |
264 | } | |
265 | ||
48483b32 | 266 | int sclp_get_cpu_info(struct sclp_cpu_info *info) |
08d07968 HC |
267 | { |
268 | int rc; | |
269 | struct read_cpu_info_sccb *sccb; | |
270 | ||
271 | if (!SCLP_HAS_CPU_INFO) | |
272 | return -EOPNOTSUPP; | |
48483b32 | 273 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
08d07968 HC |
274 | if (!sccb) |
275 | return -ENOMEM; | |
08d07968 HC |
276 | sccb->header.length = sizeof(*sccb); |
277 | rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb); | |
278 | if (rc) | |
279 | goto out; | |
280 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
281 | pr_warning("readcpuinfo failed (response=0x%04x)\n", |
282 | sccb->header.response_code); | |
08d07968 HC |
283 | rc = -EIO; |
284 | goto out; | |
285 | } | |
286 | sclp_fill_cpu_info(info, sccb); | |
287 | out: | |
288 | free_page((unsigned long) sccb); | |
289 | return rc; | |
290 | } | |
291 | ||
08d07968 HC |
292 | struct cpu_configure_sccb { |
293 | struct sccb_header header; | |
294 | } __attribute__((packed, aligned(8))); | |
295 | ||
296 | static int do_cpu_configure(sclp_cmdw_t cmd) | |
297 | { | |
298 | struct cpu_configure_sccb *sccb; | |
299 | int rc; | |
300 | ||
301 | if (!SCLP_HAS_CPU_RECONFIG) | |
302 | return -EOPNOTSUPP; | |
303 | /* | |
304 | * This is not going to cross a page boundary since we force | |
305 | * kmalloc to have a minimum alignment of 8 bytes on s390. | |
306 | */ | |
307 | sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); | |
308 | if (!sccb) | |
309 | return -ENOMEM; | |
310 | sccb->header.length = sizeof(*sccb); | |
311 | rc = do_sync_request(cmd, sccb); | |
312 | if (rc) | |
313 | goto out; | |
314 | switch (sccb->header.response_code) { | |
315 | case 0x0020: | |
316 | case 0x0120: | |
317 | break; | |
318 | default: | |
b3ff088b MS |
319 | pr_warning("configure cpu failed (cmd=0x%08x, " |
320 | "response=0x%04x)\n", cmd, | |
321 | sccb->header.response_code); | |
08d07968 HC |
322 | rc = -EIO; |
323 | break; | |
324 | } | |
325 | out: | |
326 | kfree(sccb); | |
327 | return rc; | |
328 | } | |
329 | ||
330 | int sclp_cpu_configure(u8 cpu) | |
331 | { | |
332 | return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); | |
333 | } | |
334 | ||
335 | int sclp_cpu_deconfigure(u8 cpu) | |
336 | { | |
337 | return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); | |
338 | } | |
4b28a8fe | 339 | |
e0bc2495 HC |
340 | #ifdef CONFIG_MEMORY_HOTPLUG |
341 | ||
342 | static DEFINE_MUTEX(sclp_mem_mutex); | |
343 | static LIST_HEAD(sclp_mem_list); | |
344 | static u8 sclp_max_storage_id; | |
345 | static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; | |
03997904 | 346 | static int sclp_mem_state_changed; |
e0bc2495 HC |
347 | |
348 | struct memory_increment { | |
349 | struct list_head list; | |
350 | u16 rn; | |
351 | int standby; | |
352 | int usecount; | |
353 | }; | |
354 | ||
355 | struct assign_storage_sccb { | |
356 | struct sccb_header header; | |
357 | u16 rn; | |
358 | } __packed; | |
359 | ||
9c95258c HC |
360 | int arch_get_memory_phys_device(unsigned long start_pfn) |
361 | { | |
362 | if (!rzm) | |
363 | return 0; | |
364 | return PFN_PHYS(start_pfn) >> ilog2(rzm); | |
365 | } | |
366 | ||
e0bc2495 HC |
367 | static unsigned long long rn2addr(u16 rn) |
368 | { | |
369 | return (unsigned long long) (rn - 1) * rzm; | |
370 | } | |
371 | ||
372 | static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) | |
373 | { | |
374 | struct assign_storage_sccb *sccb; | |
375 | int rc; | |
376 | ||
377 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
378 | if (!sccb) | |
379 | return -ENOMEM; | |
380 | sccb->header.length = PAGE_SIZE; | |
381 | sccb->rn = rn; | |
382 | rc = do_sync_request(cmd, sccb); | |
383 | if (rc) | |
384 | goto out; | |
385 | switch (sccb->header.response_code) { | |
386 | case 0x0020: | |
387 | case 0x0120: | |
388 | break; | |
389 | default: | |
675be97a HC |
390 | pr_warning("assign storage failed (cmd=0x%08x, " |
391 | "response=0x%04x, rn=0x%04x)\n", cmd, | |
392 | sccb->header.response_code, rn); | |
e0bc2495 HC |
393 | rc = -EIO; |
394 | break; | |
395 | } | |
396 | out: | |
397 | free_page((unsigned long) sccb); | |
398 | return rc; | |
399 | } | |
400 | ||
401 | static int sclp_assign_storage(u16 rn) | |
402 | { | |
0cd2f620 HC |
403 | unsigned long long start, address; |
404 | int rc; | |
405 | ||
406 | rc = do_assign_storage(0x000d0001, rn); | |
407 | if (rc) | |
408 | goto out; | |
409 | start = address = rn2addr(rn); | |
410 | for (; address < start + rzm; address += PAGE_SIZE) | |
411 | page_set_storage_key(address, PAGE_DEFAULT_KEY, 0); | |
412 | out: | |
413 | return rc; | |
e0bc2495 HC |
414 | } |
415 | ||
416 | static int sclp_unassign_storage(u16 rn) | |
417 | { | |
418 | return do_assign_storage(0x000c0001, rn); | |
419 | } | |
420 | ||
421 | struct attach_storage_sccb { | |
422 | struct sccb_header header; | |
423 | u16 :16; | |
424 | u16 assigned; | |
425 | u32 :32; | |
426 | u32 entries[0]; | |
427 | } __packed; | |
428 | ||
429 | static int sclp_attach_storage(u8 id) | |
430 | { | |
431 | struct attach_storage_sccb *sccb; | |
432 | int rc; | |
433 | int i; | |
434 | ||
435 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
436 | if (!sccb) | |
437 | return -ENOMEM; | |
438 | sccb->header.length = PAGE_SIZE; | |
439 | rc = do_sync_request(0x00080001 | id << 8, sccb); | |
440 | if (rc) | |
441 | goto out; | |
442 | switch (sccb->header.response_code) { | |
443 | case 0x0020: | |
444 | set_bit(id, sclp_storage_ids); | |
8adb4ca3 HC |
445 | for (i = 0; i < sccb->assigned; i++) { |
446 | if (sccb->entries[i]) | |
447 | sclp_unassign_storage(sccb->entries[i] >> 16); | |
448 | } | |
e0bc2495 HC |
449 | break; |
450 | default: | |
451 | rc = -EIO; | |
452 | break; | |
453 | } | |
454 | out: | |
455 | free_page((unsigned long) sccb); | |
456 | return rc; | |
457 | } | |
458 | ||
459 | static int sclp_mem_change_state(unsigned long start, unsigned long size, | |
460 | int online) | |
461 | { | |
462 | struct memory_increment *incr; | |
463 | unsigned long long istart; | |
464 | int rc = 0; | |
465 | ||
466 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
467 | istart = rn2addr(incr->rn); | |
468 | if (start + size - 1 < istart) | |
469 | break; | |
470 | if (start > istart + rzm - 1) | |
471 | continue; | |
472 | if (online) { | |
473 | if (incr->usecount++) | |
474 | continue; | |
475 | /* | |
476 | * Don't break the loop if one assign fails. Loop may | |
477 | * be walked again on CANCEL and we can't save | |
478 | * information if state changed before or not. | |
479 | * So continue and increase usecount for all increments. | |
480 | */ | |
481 | rc |= sclp_assign_storage(incr->rn); | |
482 | } else { | |
483 | if (--incr->usecount) | |
484 | continue; | |
485 | sclp_unassign_storage(incr->rn); | |
486 | } | |
487 | } | |
488 | return rc ? -EIO : 0; | |
489 | } | |
490 | ||
491 | static int sclp_mem_notifier(struct notifier_block *nb, | |
492 | unsigned long action, void *data) | |
493 | { | |
494 | unsigned long start, size; | |
495 | struct memory_notify *arg; | |
496 | unsigned char id; | |
497 | int rc = 0; | |
498 | ||
499 | arg = data; | |
500 | start = arg->start_pfn << PAGE_SHIFT; | |
501 | size = arg->nr_pages << PAGE_SHIFT; | |
502 | mutex_lock(&sclp_mem_mutex); | |
fc89db4b AM |
503 | for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) |
504 | sclp_attach_storage(id); | |
e0bc2495 HC |
505 | switch (action) { |
506 | case MEM_ONLINE: | |
7e9238fb GS |
507 | case MEM_GOING_OFFLINE: |
508 | case MEM_CANCEL_OFFLINE: | |
e0bc2495 HC |
509 | break; |
510 | case MEM_GOING_ONLINE: | |
511 | rc = sclp_mem_change_state(start, size, 1); | |
512 | break; | |
513 | case MEM_CANCEL_ONLINE: | |
514 | sclp_mem_change_state(start, size, 0); | |
515 | break; | |
7e9238fb GS |
516 | case MEM_OFFLINE: |
517 | sclp_mem_change_state(start, size, 0); | |
518 | break; | |
e0bc2495 HC |
519 | default: |
520 | rc = -EINVAL; | |
521 | break; | |
522 | } | |
03997904 GS |
523 | if (!rc) |
524 | sclp_mem_state_changed = 1; | |
e0bc2495 HC |
525 | mutex_unlock(&sclp_mem_mutex); |
526 | return rc ? NOTIFY_BAD : NOTIFY_OK; | |
527 | } | |
528 | ||
529 | static struct notifier_block sclp_mem_nb = { | |
530 | .notifier_call = sclp_mem_notifier, | |
531 | }; | |
532 | ||
533 | static void __init add_memory_merged(u16 rn) | |
534 | { | |
535 | static u16 first_rn, num; | |
536 | unsigned long long start, size; | |
537 | ||
538 | if (rn && first_rn && (first_rn + num == rn)) { | |
539 | num++; | |
540 | return; | |
541 | } | |
542 | if (!first_rn) | |
543 | goto skip_add; | |
544 | start = rn2addr(first_rn); | |
545 | size = (unsigned long long ) num * rzm; | |
546 | if (start >= VMEM_MAX_PHYS) | |
547 | goto skip_add; | |
548 | if (start + size > VMEM_MAX_PHYS) | |
549 | size = VMEM_MAX_PHYS - start; | |
23d75d9c HC |
550 | if (memory_end_set && (start >= memory_end)) |
551 | goto skip_add; | |
552 | if (memory_end_set && (start + size > memory_end)) | |
553 | size = memory_end - start; | |
e0bc2495 HC |
554 | add_memory(0, start, size); |
555 | skip_add: | |
556 | first_rn = rn; | |
557 | num = 1; | |
558 | } | |
559 | ||
560 | static void __init sclp_add_standby_memory(void) | |
561 | { | |
562 | struct memory_increment *incr; | |
563 | ||
564 | list_for_each_entry(incr, &sclp_mem_list, list) | |
565 | if (incr->standby) | |
566 | add_memory_merged(incr->rn); | |
567 | add_memory_merged(0); | |
568 | } | |
569 | ||
570 | static void __init insert_increment(u16 rn, int standby, int assigned) | |
571 | { | |
572 | struct memory_increment *incr, *new_incr; | |
573 | struct list_head *prev; | |
574 | u16 last_rn; | |
575 | ||
576 | new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); | |
577 | if (!new_incr) | |
578 | return; | |
579 | new_incr->rn = rn; | |
580 | new_incr->standby = standby; | |
fdb1bb15 HC |
581 | if (!standby) |
582 | new_incr->usecount = 1; | |
e0bc2495 HC |
583 | last_rn = 0; |
584 | prev = &sclp_mem_list; | |
585 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
586 | if (assigned && incr->rn > rn) | |
587 | break; | |
588 | if (!assigned && incr->rn - last_rn > 1) | |
589 | break; | |
590 | last_rn = incr->rn; | |
591 | prev = &incr->list; | |
592 | } | |
593 | if (!assigned) | |
594 | new_incr->rn = last_rn + 1; | |
595 | if (new_incr->rn > rnmax) { | |
596 | kfree(new_incr); | |
597 | return; | |
598 | } | |
599 | list_add(&new_incr->list, prev); | |
600 | } | |
601 | ||
03997904 GS |
602 | static int sclp_mem_freeze(struct device *dev) |
603 | { | |
604 | if (!sclp_mem_state_changed) | |
605 | return 0; | |
606 | pr_err("Memory hotplug state changed, suspend refused.\n"); | |
607 | return -EPERM; | |
608 | } | |
609 | ||
e0bc2495 HC |
610 | struct read_storage_sccb { |
611 | struct sccb_header header; | |
612 | u16 max_id; | |
613 | u16 assigned; | |
614 | u16 standby; | |
615 | u16 :16; | |
616 | u32 entries[0]; | |
617 | } __packed; | |
618 | ||
47145210 | 619 | static const struct dev_pm_ops sclp_mem_pm_ops = { |
03997904 GS |
620 | .freeze = sclp_mem_freeze, |
621 | }; | |
622 | ||
623 | static struct platform_driver sclp_mem_pdrv = { | |
624 | .driver = { | |
625 | .name = "sclp_mem", | |
626 | .pm = &sclp_mem_pm_ops, | |
627 | }, | |
628 | }; | |
629 | ||
e0bc2495 HC |
630 | static int __init sclp_detect_standby_memory(void) |
631 | { | |
03997904 | 632 | struct platform_device *sclp_pdev; |
e0bc2495 HC |
633 | struct read_storage_sccb *sccb; |
634 | int i, id, assigned, rc; | |
635 | ||
636 | if (!early_read_info_sccb_valid) | |
637 | return 0; | |
638 | if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) | |
639 | return 0; | |
640 | rc = -ENOMEM; | |
641 | sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); | |
642 | if (!sccb) | |
643 | goto out; | |
644 | assigned = 0; | |
645 | for (id = 0; id <= sclp_max_storage_id; id++) { | |
646 | memset(sccb, 0, PAGE_SIZE); | |
647 | sccb->header.length = PAGE_SIZE; | |
648 | rc = do_sync_request(0x00040001 | id << 8, sccb); | |
649 | if (rc) | |
650 | goto out; | |
651 | switch (sccb->header.response_code) { | |
652 | case 0x0010: | |
653 | set_bit(id, sclp_storage_ids); | |
654 | for (i = 0; i < sccb->assigned; i++) { | |
655 | if (!sccb->entries[i]) | |
656 | continue; | |
657 | assigned++; | |
658 | insert_increment(sccb->entries[i] >> 16, 0, 1); | |
659 | } | |
660 | break; | |
661 | case 0x0310: | |
662 | break; | |
663 | case 0x0410: | |
664 | for (i = 0; i < sccb->assigned; i++) { | |
665 | if (!sccb->entries[i]) | |
666 | continue; | |
667 | assigned++; | |
668 | insert_increment(sccb->entries[i] >> 16, 1, 1); | |
669 | } | |
670 | break; | |
671 | default: | |
672 | rc = -EIO; | |
673 | break; | |
674 | } | |
675 | if (!rc) | |
676 | sclp_max_storage_id = sccb->max_id; | |
677 | } | |
678 | if (rc || list_empty(&sclp_mem_list)) | |
679 | goto out; | |
680 | for (i = 1; i <= rnmax - assigned; i++) | |
681 | insert_increment(0, 1, 0); | |
682 | rc = register_memory_notifier(&sclp_mem_nb); | |
683 | if (rc) | |
684 | goto out; | |
03997904 GS |
685 | rc = platform_driver_register(&sclp_mem_pdrv); |
686 | if (rc) | |
687 | goto out; | |
688 | sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); | |
689 | rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0; | |
690 | if (rc) | |
691 | goto out_driver; | |
e0bc2495 | 692 | sclp_add_standby_memory(); |
03997904 GS |
693 | goto out; |
694 | out_driver: | |
695 | platform_driver_unregister(&sclp_mem_pdrv); | |
e0bc2495 HC |
696 | out: |
697 | free_page((unsigned long) sccb); | |
698 | return rc; | |
699 | } | |
700 | __initcall(sclp_detect_standby_memory); | |
701 | ||
702 | #endif /* CONFIG_MEMORY_HOTPLUG */ | |
703 | ||
4b28a8fe HC |
704 | /* |
705 | * Channel path configuration related functions. | |
706 | */ | |
707 | ||
708 | #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 | |
709 | #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 | |
710 | #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 | |
711 | ||
712 | struct chp_cfg_sccb { | |
713 | struct sccb_header header; | |
714 | u8 ccm; | |
715 | u8 reserved[6]; | |
716 | u8 cssid; | |
717 | } __attribute__((packed)); | |
718 | ||
719 | static int do_chp_configure(sclp_cmdw_t cmd) | |
720 | { | |
721 | struct chp_cfg_sccb *sccb; | |
722 | int rc; | |
723 | ||
724 | if (!SCLP_HAS_CHP_RECONFIG) | |
725 | return -EOPNOTSUPP; | |
726 | /* Prepare sccb. */ | |
727 | sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
728 | if (!sccb) | |
729 | return -ENOMEM; | |
730 | sccb->header.length = sizeof(*sccb); | |
731 | rc = do_sync_request(cmd, sccb); | |
732 | if (rc) | |
733 | goto out; | |
734 | switch (sccb->header.response_code) { | |
735 | case 0x0020: | |
736 | case 0x0120: | |
737 | case 0x0440: | |
738 | case 0x0450: | |
739 | break; | |
740 | default: | |
b3ff088b MS |
741 | pr_warning("configure channel-path failed " |
742 | "(cmd=0x%08x, response=0x%04x)\n", cmd, | |
743 | sccb->header.response_code); | |
4b28a8fe HC |
744 | rc = -EIO; |
745 | break; | |
746 | } | |
747 | out: | |
748 | free_page((unsigned long) sccb); | |
749 | return rc; | |
750 | } | |
751 | ||
752 | /** | |
753 | * sclp_chp_configure - perform configure channel-path sclp command | |
754 | * @chpid: channel-path ID | |
755 | * | |
756 | * Perform configure channel-path command sclp command for specified chpid. | |
757 | * Return 0 after command successfully finished, non-zero otherwise. | |
758 | */ | |
759 | int sclp_chp_configure(struct chp_id chpid) | |
760 | { | |
761 | return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); | |
762 | } | |
763 | ||
764 | /** | |
765 | * sclp_chp_deconfigure - perform deconfigure channel-path sclp command | |
766 | * @chpid: channel-path ID | |
767 | * | |
768 | * Perform deconfigure channel-path command sclp command for specified chpid | |
769 | * and wait for completion. On success return 0. Return non-zero otherwise. | |
770 | */ | |
771 | int sclp_chp_deconfigure(struct chp_id chpid) | |
772 | { | |
773 | return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); | |
774 | } | |
775 | ||
776 | struct chp_info_sccb { | |
777 | struct sccb_header header; | |
778 | u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; | |
779 | u8 standby[SCLP_CHP_INFO_MASK_SIZE]; | |
780 | u8 configured[SCLP_CHP_INFO_MASK_SIZE]; | |
781 | u8 ccm; | |
782 | u8 reserved[6]; | |
783 | u8 cssid; | |
784 | } __attribute__((packed)); | |
785 | ||
786 | /** | |
787 | * sclp_chp_read_info - perform read channel-path information sclp command | |
788 | * @info: resulting channel-path information data | |
789 | * | |
790 | * Perform read channel-path information sclp command and wait for completion. | |
791 | * On success, store channel-path information in @info and return 0. Return | |
792 | * non-zero otherwise. | |
793 | */ | |
794 | int sclp_chp_read_info(struct sclp_chp_info *info) | |
795 | { | |
796 | struct chp_info_sccb *sccb; | |
797 | int rc; | |
798 | ||
799 | if (!SCLP_HAS_CHP_INFO) | |
800 | return -EOPNOTSUPP; | |
801 | /* Prepare sccb. */ | |
802 | sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
803 | if (!sccb) | |
804 | return -ENOMEM; | |
805 | sccb->header.length = sizeof(*sccb); | |
806 | rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); | |
807 | if (rc) | |
808 | goto out; | |
809 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
810 | pr_warning("read channel-path info failed " |
811 | "(response=0x%04x)\n", sccb->header.response_code); | |
4b28a8fe HC |
812 | rc = -EIO; |
813 | goto out; | |
814 | } | |
815 | memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); | |
816 | memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); | |
817 | memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); | |
818 | out: | |
819 | free_page((unsigned long) sccb); | |
820 | return rc; | |
821 | } |