Commit | Line | Data |
---|---|---|
08d07968 | 1 | /* |
7441b062 | 2 | * Copyright IBM Corp. 2007,2012 |
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> |
7441b062 | 15 | #include <linux/export.h> |
08d07968 HC |
16 | #include <linux/slab.h> |
17 | #include <linux/string.h> | |
e0bc2495 HC |
18 | #include <linux/mm.h> |
19 | #include <linux/mmzone.h> | |
20 | #include <linux/memory.h> | |
1526bf9c | 21 | #include <linux/module.h> |
03997904 | 22 | #include <linux/platform_device.h> |
6b70a920 | 23 | #include <asm/ctl_reg.h> |
4b28a8fe | 24 | #include <asm/chpid.h> |
23d75d9c | 25 | #include <asm/setup.h> |
6b70a920 HC |
26 | #include <asm/page.h> |
27 | #include <asm/sclp.h> | |
08d07968 | 28 | |
b3ff088b | 29 | #include "sclp.h" |
08d07968 HC |
30 | |
31 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
32 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
33 | ||
34 | struct read_info_sccb { | |
35 | struct sccb_header header; /* 0-7 */ | |
36 | u16 rnmax; /* 8-9 */ | |
37 | u8 rnsize; /* 10 */ | |
38 | u8 _reserved0[24 - 11]; /* 11-15 */ | |
39 | u8 loadparm[8]; /* 24-31 */ | |
40 | u8 _reserved1[48 - 32]; /* 32-47 */ | |
41 | u64 facilities; /* 48-55 */ | |
42 | u8 _reserved2[84 - 56]; /* 56-83 */ | |
43 | u8 fac84; /* 84 */ | |
1526bf9c CB |
44 | u8 fac85; /* 85 */ |
45 | u8 _reserved3[91 - 86]; /* 86-90 */ | |
08d07968 HC |
46 | u8 flags; /* 91 */ |
47 | u8 _reserved4[100 - 92]; /* 92-99 */ | |
48 | u32 rnsize2; /* 100-103 */ | |
49 | u64 rnmax2; /* 104-111 */ | |
50 | u8 _reserved5[4096 - 112]; /* 112-4095 */ | |
51 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
52 | ||
cd183459 | 53 | static struct init_sccb __initdata early_event_mask_sccb __aligned(PAGE_SIZE); |
08d07968 HC |
54 | static struct read_info_sccb __initdata early_read_info_sccb; |
55 | static int __initdata early_read_info_sccb_valid; | |
56 | ||
57 | u64 sclp_facilities; | |
58 | static u8 sclp_fac84; | |
e0bc2495 HC |
59 | static unsigned long long rzm; |
60 | static unsigned long long rnmax; | |
08d07968 HC |
61 | |
62 | static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) | |
63 | { | |
64 | int rc; | |
65 | ||
66 | __ctl_set_bit(0, 9); | |
67 | rc = sclp_service_call(cmd, sccb); | |
68 | if (rc) | |
69 | goto out; | |
b50511e4 MS |
70 | __load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA | |
71 | PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT); | |
08d07968 HC |
72 | local_irq_disable(); |
73 | out: | |
74 | /* Contents of the sccb might have changed. */ | |
75 | barrier(); | |
76 | __ctl_clear_bit(0, 9); | |
77 | return rc; | |
78 | } | |
79 | ||
23d17421 | 80 | static void __init sclp_read_info_early(void) |
08d07968 HC |
81 | { |
82 | int rc; | |
83 | int i; | |
84 | struct read_info_sccb *sccb; | |
85 | sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, | |
86 | SCLP_CMDW_READ_SCP_INFO}; | |
87 | ||
88 | sccb = &early_read_info_sccb; | |
89 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
90 | do { | |
91 | memset(sccb, 0, sizeof(*sccb)); | |
92 | sccb->header.length = sizeof(*sccb); | |
cb9d7160 | 93 | sccb->header.function_code = 0x80; |
08d07968 HC |
94 | sccb->header.control_mask[2] = 0x80; |
95 | rc = sclp_cmd_sync_early(commands[i], sccb); | |
96 | } while (rc == -EBUSY); | |
97 | ||
98 | if (rc) | |
99 | break; | |
100 | if (sccb->header.response_code == 0x10) { | |
101 | early_read_info_sccb_valid = 1; | |
102 | break; | |
103 | } | |
104 | if (sccb->header.response_code != 0x1f0) | |
105 | break; | |
106 | } | |
107 | } | |
108 | ||
cd183459 HG |
109 | static void __init sclp_event_mask_early(void) |
110 | { | |
111 | struct init_sccb *sccb = &early_event_mask_sccb; | |
112 | int rc; | |
113 | ||
114 | do { | |
115 | memset(sccb, 0, sizeof(*sccb)); | |
116 | sccb->header.length = sizeof(*sccb); | |
117 | sccb->mask_length = sizeof(sccb_mask_t); | |
118 | rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb); | |
119 | } while (rc == -EBUSY); | |
120 | } | |
121 | ||
08d07968 HC |
122 | void __init sclp_facilities_detect(void) |
123 | { | |
08d07968 HC |
124 | struct read_info_sccb *sccb; |
125 | ||
23d17421 | 126 | sclp_read_info_early(); |
08d07968 | 127 | if (!early_read_info_sccb_valid) |
23d17421 HC |
128 | return; |
129 | ||
08d07968 | 130 | sccb = &early_read_info_sccb; |
23d17421 HC |
131 | sclp_facilities = sccb->facilities; |
132 | sclp_fac84 = sccb->fac84; | |
abf09bed MS |
133 | if (sccb->fac85 & 0x02) |
134 | S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP; | |
e0bc2495 HC |
135 | rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; |
136 | rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; | |
137 | rzm <<= 20; | |
cd183459 HG |
138 | |
139 | sclp_event_mask_early(); | |
140 | } | |
141 | ||
142 | bool __init sclp_has_linemode(void) | |
143 | { | |
144 | struct init_sccb *sccb = &early_event_mask_sccb; | |
145 | ||
146 | if (sccb->header.response_code != 0x20) | |
147 | return 0; | |
148 | if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)) | |
149 | return 1; | |
150 | return 0; | |
151 | } | |
152 | ||
153 | bool __init sclp_has_vt220(void) | |
154 | { | |
155 | struct init_sccb *sccb = &early_event_mask_sccb; | |
156 | ||
157 | if (sccb->header.response_code != 0x20) | |
158 | return 0; | |
159 | if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK) | |
160 | return 1; | |
161 | return 0; | |
23d17421 HC |
162 | } |
163 | ||
164 | unsigned long long sclp_get_rnmax(void) | |
165 | { | |
166 | return rnmax; | |
167 | } | |
168 | ||
169 | unsigned long long sclp_get_rzm(void) | |
170 | { | |
171 | return rzm; | |
08d07968 HC |
172 | } |
173 | ||
174 | /* | |
23d17421 HC |
175 | * This function will be called after sclp_facilities_detect(), which gets |
176 | * called from early.c code. Therefore the sccb should have valid contents. | |
08d07968 HC |
177 | */ |
178 | void __init sclp_get_ipl_info(struct sclp_ipl_info *info) | |
179 | { | |
180 | struct read_info_sccb *sccb; | |
181 | ||
182 | if (!early_read_info_sccb_valid) | |
183 | return; | |
184 | sccb = &early_read_info_sccb; | |
185 | info->is_valid = 1; | |
186 | if (sccb->flags & 0x2) | |
187 | info->has_dump = 1; | |
188 | memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); | |
189 | } | |
190 | ||
191 | static void sclp_sync_callback(struct sclp_req *req, void *data) | |
192 | { | |
193 | struct completion *completion = data; | |
194 | ||
195 | complete(completion); | |
196 | } | |
197 | ||
198 | static int do_sync_request(sclp_cmdw_t cmd, void *sccb) | |
199 | { | |
200 | struct completion completion; | |
201 | struct sclp_req *request; | |
202 | int rc; | |
203 | ||
204 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
205 | if (!request) | |
206 | return -ENOMEM; | |
207 | request->command = cmd; | |
208 | request->sccb = sccb; | |
209 | request->status = SCLP_REQ_FILLED; | |
210 | request->callback = sclp_sync_callback; | |
211 | request->callback_data = &completion; | |
212 | init_completion(&completion); | |
213 | ||
214 | /* Perform sclp request. */ | |
215 | rc = sclp_add_request(request); | |
216 | if (rc) | |
217 | goto out; | |
218 | wait_for_completion(&completion); | |
219 | ||
220 | /* Check response. */ | |
221 | if (request->status != SCLP_REQ_DONE) { | |
b3ff088b MS |
222 | pr_warning("sync request failed (cmd=0x%08x, " |
223 | "status=0x%02x)\n", cmd, request->status); | |
08d07968 HC |
224 | rc = -EIO; |
225 | } | |
226 | out: | |
227 | kfree(request); | |
228 | return rc; | |
229 | } | |
230 | ||
231 | /* | |
232 | * CPU configuration related functions. | |
233 | */ | |
234 | ||
235 | #define SCLP_CMDW_READ_CPU_INFO 0x00010001 | |
236 | #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 | |
237 | #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 | |
238 | ||
239 | struct read_cpu_info_sccb { | |
240 | struct sccb_header header; | |
241 | u16 nr_configured; | |
242 | u16 offset_configured; | |
243 | u16 nr_standby; | |
244 | u16 offset_standby; | |
245 | u8 reserved[4096 - 16]; | |
246 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
247 | ||
08d07968 HC |
248 | static void sclp_fill_cpu_info(struct sclp_cpu_info *info, |
249 | struct read_cpu_info_sccb *sccb) | |
250 | { | |
251 | char *page = (char *) sccb; | |
252 | ||
253 | memset(info, 0, sizeof(*info)); | |
254 | info->configured = sccb->nr_configured; | |
255 | info->standby = sccb->nr_standby; | |
256 | info->combined = sccb->nr_configured + sccb->nr_standby; | |
257 | info->has_cpu_type = sclp_fac84 & 0x1; | |
258 | memcpy(&info->cpu, page + sccb->offset_configured, | |
259 | info->combined * sizeof(struct sclp_cpu_entry)); | |
260 | } | |
261 | ||
48483b32 | 262 | int sclp_get_cpu_info(struct sclp_cpu_info *info) |
08d07968 HC |
263 | { |
264 | int rc; | |
265 | struct read_cpu_info_sccb *sccb; | |
266 | ||
267 | if (!SCLP_HAS_CPU_INFO) | |
268 | return -EOPNOTSUPP; | |
48483b32 | 269 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
08d07968 HC |
270 | if (!sccb) |
271 | return -ENOMEM; | |
08d07968 HC |
272 | sccb->header.length = sizeof(*sccb); |
273 | rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb); | |
274 | if (rc) | |
275 | goto out; | |
276 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
277 | pr_warning("readcpuinfo failed (response=0x%04x)\n", |
278 | sccb->header.response_code); | |
08d07968 HC |
279 | rc = -EIO; |
280 | goto out; | |
281 | } | |
282 | sclp_fill_cpu_info(info, sccb); | |
283 | out: | |
284 | free_page((unsigned long) sccb); | |
285 | return rc; | |
286 | } | |
287 | ||
08d07968 HC |
288 | struct cpu_configure_sccb { |
289 | struct sccb_header header; | |
290 | } __attribute__((packed, aligned(8))); | |
291 | ||
292 | static int do_cpu_configure(sclp_cmdw_t cmd) | |
293 | { | |
294 | struct cpu_configure_sccb *sccb; | |
295 | int rc; | |
296 | ||
297 | if (!SCLP_HAS_CPU_RECONFIG) | |
298 | return -EOPNOTSUPP; | |
299 | /* | |
300 | * This is not going to cross a page boundary since we force | |
301 | * kmalloc to have a minimum alignment of 8 bytes on s390. | |
302 | */ | |
303 | sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); | |
304 | if (!sccb) | |
305 | return -ENOMEM; | |
306 | sccb->header.length = sizeof(*sccb); | |
307 | rc = do_sync_request(cmd, sccb); | |
308 | if (rc) | |
309 | goto out; | |
310 | switch (sccb->header.response_code) { | |
311 | case 0x0020: | |
312 | case 0x0120: | |
313 | break; | |
314 | default: | |
b3ff088b MS |
315 | pr_warning("configure cpu failed (cmd=0x%08x, " |
316 | "response=0x%04x)\n", cmd, | |
317 | sccb->header.response_code); | |
08d07968 HC |
318 | rc = -EIO; |
319 | break; | |
320 | } | |
321 | out: | |
322 | kfree(sccb); | |
323 | return rc; | |
324 | } | |
325 | ||
326 | int sclp_cpu_configure(u8 cpu) | |
327 | { | |
328 | return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); | |
329 | } | |
330 | ||
331 | int sclp_cpu_deconfigure(u8 cpu) | |
332 | { | |
333 | return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); | |
334 | } | |
4b28a8fe | 335 | |
e0bc2495 HC |
336 | #ifdef CONFIG_MEMORY_HOTPLUG |
337 | ||
338 | static DEFINE_MUTEX(sclp_mem_mutex); | |
339 | static LIST_HEAD(sclp_mem_list); | |
340 | static u8 sclp_max_storage_id; | |
341 | static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; | |
03997904 | 342 | static int sclp_mem_state_changed; |
e0bc2495 HC |
343 | |
344 | struct memory_increment { | |
345 | struct list_head list; | |
346 | u16 rn; | |
347 | int standby; | |
348 | int usecount; | |
349 | }; | |
350 | ||
351 | struct assign_storage_sccb { | |
352 | struct sccb_header header; | |
353 | u16 rn; | |
354 | } __packed; | |
355 | ||
9c95258c HC |
356 | int arch_get_memory_phys_device(unsigned long start_pfn) |
357 | { | |
358 | if (!rzm) | |
359 | return 0; | |
360 | return PFN_PHYS(start_pfn) >> ilog2(rzm); | |
361 | } | |
362 | ||
e0bc2495 HC |
363 | static unsigned long long rn2addr(u16 rn) |
364 | { | |
365 | return (unsigned long long) (rn - 1) * rzm; | |
366 | } | |
367 | ||
368 | static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) | |
369 | { | |
370 | struct assign_storage_sccb *sccb; | |
371 | int rc; | |
372 | ||
373 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
374 | if (!sccb) | |
375 | return -ENOMEM; | |
376 | sccb->header.length = PAGE_SIZE; | |
377 | sccb->rn = rn; | |
378 | rc = do_sync_request(cmd, sccb); | |
379 | if (rc) | |
380 | goto out; | |
381 | switch (sccb->header.response_code) { | |
382 | case 0x0020: | |
383 | case 0x0120: | |
384 | break; | |
385 | default: | |
675be97a HC |
386 | pr_warning("assign storage failed (cmd=0x%08x, " |
387 | "response=0x%04x, rn=0x%04x)\n", cmd, | |
388 | sccb->header.response_code, rn); | |
e0bc2495 HC |
389 | rc = -EIO; |
390 | break; | |
391 | } | |
392 | out: | |
393 | free_page((unsigned long) sccb); | |
394 | return rc; | |
395 | } | |
396 | ||
397 | static int sclp_assign_storage(u16 rn) | |
398 | { | |
6b70a920 | 399 | unsigned long long start; |
0cd2f620 HC |
400 | int rc; |
401 | ||
402 | rc = do_assign_storage(0x000d0001, rn); | |
403 | if (rc) | |
6b70a920 HC |
404 | return rc; |
405 | start = rn2addr(rn); | |
406 | storage_key_init_range(start, start + rzm); | |
407 | return 0; | |
e0bc2495 HC |
408 | } |
409 | ||
410 | static int sclp_unassign_storage(u16 rn) | |
411 | { | |
412 | return do_assign_storage(0x000c0001, rn); | |
413 | } | |
414 | ||
415 | struct attach_storage_sccb { | |
416 | struct sccb_header header; | |
417 | u16 :16; | |
418 | u16 assigned; | |
419 | u32 :32; | |
420 | u32 entries[0]; | |
421 | } __packed; | |
422 | ||
423 | static int sclp_attach_storage(u8 id) | |
424 | { | |
425 | struct attach_storage_sccb *sccb; | |
426 | int rc; | |
427 | int i; | |
428 | ||
429 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
430 | if (!sccb) | |
431 | return -ENOMEM; | |
432 | sccb->header.length = PAGE_SIZE; | |
433 | rc = do_sync_request(0x00080001 | id << 8, sccb); | |
434 | if (rc) | |
435 | goto out; | |
436 | switch (sccb->header.response_code) { | |
437 | case 0x0020: | |
438 | set_bit(id, sclp_storage_ids); | |
8adb4ca3 HC |
439 | for (i = 0; i < sccb->assigned; i++) { |
440 | if (sccb->entries[i]) | |
441 | sclp_unassign_storage(sccb->entries[i] >> 16); | |
442 | } | |
e0bc2495 HC |
443 | break; |
444 | default: | |
445 | rc = -EIO; | |
446 | break; | |
447 | } | |
448 | out: | |
449 | free_page((unsigned long) sccb); | |
450 | return rc; | |
451 | } | |
452 | ||
453 | static int sclp_mem_change_state(unsigned long start, unsigned long size, | |
454 | int online) | |
455 | { | |
456 | struct memory_increment *incr; | |
457 | unsigned long long istart; | |
458 | int rc = 0; | |
459 | ||
460 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
461 | istart = rn2addr(incr->rn); | |
462 | if (start + size - 1 < istart) | |
463 | break; | |
464 | if (start > istart + rzm - 1) | |
465 | continue; | |
466 | if (online) { | |
467 | if (incr->usecount++) | |
468 | continue; | |
469 | /* | |
470 | * Don't break the loop if one assign fails. Loop may | |
471 | * be walked again on CANCEL and we can't save | |
472 | * information if state changed before or not. | |
473 | * So continue and increase usecount for all increments. | |
474 | */ | |
475 | rc |= sclp_assign_storage(incr->rn); | |
476 | } else { | |
477 | if (--incr->usecount) | |
478 | continue; | |
479 | sclp_unassign_storage(incr->rn); | |
480 | } | |
481 | } | |
482 | return rc ? -EIO : 0; | |
483 | } | |
484 | ||
485 | static int sclp_mem_notifier(struct notifier_block *nb, | |
486 | unsigned long action, void *data) | |
487 | { | |
488 | unsigned long start, size; | |
489 | struct memory_notify *arg; | |
490 | unsigned char id; | |
491 | int rc = 0; | |
492 | ||
493 | arg = data; | |
494 | start = arg->start_pfn << PAGE_SHIFT; | |
495 | size = arg->nr_pages << PAGE_SHIFT; | |
496 | mutex_lock(&sclp_mem_mutex); | |
fc89db4b AM |
497 | for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) |
498 | sclp_attach_storage(id); | |
e0bc2495 HC |
499 | switch (action) { |
500 | case MEM_ONLINE: | |
7e9238fb GS |
501 | case MEM_GOING_OFFLINE: |
502 | case MEM_CANCEL_OFFLINE: | |
e0bc2495 HC |
503 | break; |
504 | case MEM_GOING_ONLINE: | |
505 | rc = sclp_mem_change_state(start, size, 1); | |
506 | break; | |
507 | case MEM_CANCEL_ONLINE: | |
508 | sclp_mem_change_state(start, size, 0); | |
509 | break; | |
7e9238fb GS |
510 | case MEM_OFFLINE: |
511 | sclp_mem_change_state(start, size, 0); | |
512 | break; | |
e0bc2495 HC |
513 | default: |
514 | rc = -EINVAL; | |
515 | break; | |
516 | } | |
03997904 GS |
517 | if (!rc) |
518 | sclp_mem_state_changed = 1; | |
e0bc2495 HC |
519 | mutex_unlock(&sclp_mem_mutex); |
520 | return rc ? NOTIFY_BAD : NOTIFY_OK; | |
521 | } | |
522 | ||
523 | static struct notifier_block sclp_mem_nb = { | |
524 | .notifier_call = sclp_mem_notifier, | |
525 | }; | |
526 | ||
527 | static void __init add_memory_merged(u16 rn) | |
528 | { | |
529 | static u16 first_rn, num; | |
530 | unsigned long long start, size; | |
531 | ||
532 | if (rn && first_rn && (first_rn + num == rn)) { | |
533 | num++; | |
534 | return; | |
535 | } | |
536 | if (!first_rn) | |
537 | goto skip_add; | |
538 | start = rn2addr(first_rn); | |
539 | size = (unsigned long long ) num * rzm; | |
540 | if (start >= VMEM_MAX_PHYS) | |
541 | goto skip_add; | |
542 | if (start + size > VMEM_MAX_PHYS) | |
543 | size = VMEM_MAX_PHYS - start; | |
23d75d9c HC |
544 | if (memory_end_set && (start >= memory_end)) |
545 | goto skip_add; | |
546 | if (memory_end_set && (start + size > memory_end)) | |
547 | size = memory_end - start; | |
e0bc2495 HC |
548 | add_memory(0, start, size); |
549 | skip_add: | |
550 | first_rn = rn; | |
551 | num = 1; | |
552 | } | |
553 | ||
554 | static void __init sclp_add_standby_memory(void) | |
555 | { | |
556 | struct memory_increment *incr; | |
557 | ||
558 | list_for_each_entry(incr, &sclp_mem_list, list) | |
559 | if (incr->standby) | |
560 | add_memory_merged(incr->rn); | |
561 | add_memory_merged(0); | |
562 | } | |
563 | ||
564 | static void __init insert_increment(u16 rn, int standby, int assigned) | |
565 | { | |
566 | struct memory_increment *incr, *new_incr; | |
567 | struct list_head *prev; | |
568 | u16 last_rn; | |
569 | ||
570 | new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); | |
571 | if (!new_incr) | |
572 | return; | |
573 | new_incr->rn = rn; | |
574 | new_incr->standby = standby; | |
fdb1bb15 HC |
575 | if (!standby) |
576 | new_incr->usecount = 1; | |
e0bc2495 HC |
577 | last_rn = 0; |
578 | prev = &sclp_mem_list; | |
579 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
580 | if (assigned && incr->rn > rn) | |
581 | break; | |
582 | if (!assigned && incr->rn - last_rn > 1) | |
583 | break; | |
584 | last_rn = incr->rn; | |
585 | prev = &incr->list; | |
586 | } | |
587 | if (!assigned) | |
588 | new_incr->rn = last_rn + 1; | |
589 | if (new_incr->rn > rnmax) { | |
590 | kfree(new_incr); | |
591 | return; | |
592 | } | |
593 | list_add(&new_incr->list, prev); | |
594 | } | |
595 | ||
03997904 GS |
596 | static int sclp_mem_freeze(struct device *dev) |
597 | { | |
598 | if (!sclp_mem_state_changed) | |
599 | return 0; | |
600 | pr_err("Memory hotplug state changed, suspend refused.\n"); | |
601 | return -EPERM; | |
602 | } | |
603 | ||
e0bc2495 HC |
604 | struct read_storage_sccb { |
605 | struct sccb_header header; | |
606 | u16 max_id; | |
607 | u16 assigned; | |
608 | u16 standby; | |
609 | u16 :16; | |
610 | u32 entries[0]; | |
611 | } __packed; | |
612 | ||
47145210 | 613 | static const struct dev_pm_ops sclp_mem_pm_ops = { |
03997904 GS |
614 | .freeze = sclp_mem_freeze, |
615 | }; | |
616 | ||
617 | static struct platform_driver sclp_mem_pdrv = { | |
618 | .driver = { | |
619 | .name = "sclp_mem", | |
620 | .pm = &sclp_mem_pm_ops, | |
621 | }, | |
622 | }; | |
623 | ||
e0bc2495 HC |
624 | static int __init sclp_detect_standby_memory(void) |
625 | { | |
03997904 | 626 | struct platform_device *sclp_pdev; |
e0bc2495 HC |
627 | struct read_storage_sccb *sccb; |
628 | int i, id, assigned, rc; | |
629 | ||
630 | if (!early_read_info_sccb_valid) | |
631 | return 0; | |
632 | if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) | |
633 | return 0; | |
634 | rc = -ENOMEM; | |
635 | sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); | |
636 | if (!sccb) | |
637 | goto out; | |
638 | assigned = 0; | |
639 | for (id = 0; id <= sclp_max_storage_id; id++) { | |
640 | memset(sccb, 0, PAGE_SIZE); | |
641 | sccb->header.length = PAGE_SIZE; | |
642 | rc = do_sync_request(0x00040001 | id << 8, sccb); | |
643 | if (rc) | |
644 | goto out; | |
645 | switch (sccb->header.response_code) { | |
646 | case 0x0010: | |
647 | set_bit(id, sclp_storage_ids); | |
648 | for (i = 0; i < sccb->assigned; i++) { | |
649 | if (!sccb->entries[i]) | |
650 | continue; | |
651 | assigned++; | |
652 | insert_increment(sccb->entries[i] >> 16, 0, 1); | |
653 | } | |
654 | break; | |
655 | case 0x0310: | |
656 | break; | |
657 | case 0x0410: | |
658 | for (i = 0; i < sccb->assigned; i++) { | |
659 | if (!sccb->entries[i]) | |
660 | continue; | |
661 | assigned++; | |
662 | insert_increment(sccb->entries[i] >> 16, 1, 1); | |
663 | } | |
664 | break; | |
665 | default: | |
666 | rc = -EIO; | |
667 | break; | |
668 | } | |
669 | if (!rc) | |
670 | sclp_max_storage_id = sccb->max_id; | |
671 | } | |
672 | if (rc || list_empty(&sclp_mem_list)) | |
673 | goto out; | |
674 | for (i = 1; i <= rnmax - assigned; i++) | |
675 | insert_increment(0, 1, 0); | |
676 | rc = register_memory_notifier(&sclp_mem_nb); | |
677 | if (rc) | |
678 | goto out; | |
03997904 GS |
679 | rc = platform_driver_register(&sclp_mem_pdrv); |
680 | if (rc) | |
681 | goto out; | |
682 | sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); | |
683 | rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0; | |
684 | if (rc) | |
685 | goto out_driver; | |
e0bc2495 | 686 | sclp_add_standby_memory(); |
03997904 GS |
687 | goto out; |
688 | out_driver: | |
689 | platform_driver_unregister(&sclp_mem_pdrv); | |
e0bc2495 HC |
690 | out: |
691 | free_page((unsigned long) sccb); | |
692 | return rc; | |
693 | } | |
694 | __initcall(sclp_detect_standby_memory); | |
695 | ||
696 | #endif /* CONFIG_MEMORY_HOTPLUG */ | |
697 | ||
7441b062 JG |
698 | /* |
699 | * PCI I/O adapter configuration related functions. | |
700 | */ | |
701 | #define SCLP_CMDW_CONFIGURE_PCI 0x001a0001 | |
702 | #define SCLP_CMDW_DECONFIGURE_PCI 0x001b0001 | |
703 | ||
704 | #define SCLP_RECONFIG_PCI_ATPYE 2 | |
705 | ||
706 | struct pci_cfg_sccb { | |
707 | struct sccb_header header; | |
708 | u8 atype; /* adapter type */ | |
709 | u8 reserved1; | |
710 | u16 reserved2; | |
711 | u32 aid; /* adapter identifier */ | |
712 | } __packed; | |
713 | ||
714 | static int do_pci_configure(sclp_cmdw_t cmd, u32 fid) | |
715 | { | |
716 | struct pci_cfg_sccb *sccb; | |
717 | int rc; | |
718 | ||
719 | if (!SCLP_HAS_PCI_RECONFIG) | |
720 | return -EOPNOTSUPP; | |
721 | ||
722 | sccb = (struct pci_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
723 | if (!sccb) | |
724 | return -ENOMEM; | |
725 | ||
726 | sccb->header.length = PAGE_SIZE; | |
727 | sccb->atype = SCLP_RECONFIG_PCI_ATPYE; | |
728 | sccb->aid = fid; | |
729 | rc = do_sync_request(cmd, sccb); | |
730 | if (rc) | |
731 | goto out; | |
732 | switch (sccb->header.response_code) { | |
733 | case 0x0020: | |
734 | case 0x0120: | |
735 | break; | |
736 | default: | |
737 | pr_warn("configure PCI I/O adapter failed: cmd=0x%08x response=0x%04x\n", | |
738 | cmd, sccb->header.response_code); | |
739 | rc = -EIO; | |
740 | break; | |
741 | } | |
742 | out: | |
743 | free_page((unsigned long) sccb); | |
744 | return rc; | |
745 | } | |
746 | ||
747 | int sclp_pci_configure(u32 fid) | |
748 | { | |
749 | return do_pci_configure(SCLP_CMDW_CONFIGURE_PCI, fid); | |
750 | } | |
751 | EXPORT_SYMBOL(sclp_pci_configure); | |
752 | ||
753 | int sclp_pci_deconfigure(u32 fid) | |
754 | { | |
755 | return do_pci_configure(SCLP_CMDW_DECONFIGURE_PCI, fid); | |
756 | } | |
757 | EXPORT_SYMBOL(sclp_pci_deconfigure); | |
758 | ||
4b28a8fe HC |
759 | /* |
760 | * Channel path configuration related functions. | |
761 | */ | |
762 | ||
763 | #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 | |
764 | #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 | |
765 | #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 | |
766 | ||
767 | struct chp_cfg_sccb { | |
768 | struct sccb_header header; | |
769 | u8 ccm; | |
770 | u8 reserved[6]; | |
771 | u8 cssid; | |
772 | } __attribute__((packed)); | |
773 | ||
774 | static int do_chp_configure(sclp_cmdw_t cmd) | |
775 | { | |
776 | struct chp_cfg_sccb *sccb; | |
777 | int rc; | |
778 | ||
779 | if (!SCLP_HAS_CHP_RECONFIG) | |
780 | return -EOPNOTSUPP; | |
781 | /* Prepare sccb. */ | |
782 | sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
783 | if (!sccb) | |
784 | return -ENOMEM; | |
785 | sccb->header.length = sizeof(*sccb); | |
786 | rc = do_sync_request(cmd, sccb); | |
787 | if (rc) | |
788 | goto out; | |
789 | switch (sccb->header.response_code) { | |
790 | case 0x0020: | |
791 | case 0x0120: | |
792 | case 0x0440: | |
793 | case 0x0450: | |
794 | break; | |
795 | default: | |
b3ff088b MS |
796 | pr_warning("configure channel-path failed " |
797 | "(cmd=0x%08x, response=0x%04x)\n", cmd, | |
798 | sccb->header.response_code); | |
4b28a8fe HC |
799 | rc = -EIO; |
800 | break; | |
801 | } | |
802 | out: | |
803 | free_page((unsigned long) sccb); | |
804 | return rc; | |
805 | } | |
806 | ||
807 | /** | |
808 | * sclp_chp_configure - perform configure channel-path sclp command | |
809 | * @chpid: channel-path ID | |
810 | * | |
811 | * Perform configure channel-path command sclp command for specified chpid. | |
812 | * Return 0 after command successfully finished, non-zero otherwise. | |
813 | */ | |
814 | int sclp_chp_configure(struct chp_id chpid) | |
815 | { | |
816 | return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); | |
817 | } | |
818 | ||
819 | /** | |
820 | * sclp_chp_deconfigure - perform deconfigure channel-path sclp command | |
821 | * @chpid: channel-path ID | |
822 | * | |
823 | * Perform deconfigure channel-path command sclp command for specified chpid | |
824 | * and wait for completion. On success return 0. Return non-zero otherwise. | |
825 | */ | |
826 | int sclp_chp_deconfigure(struct chp_id chpid) | |
827 | { | |
828 | return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); | |
829 | } | |
830 | ||
831 | struct chp_info_sccb { | |
832 | struct sccb_header header; | |
833 | u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; | |
834 | u8 standby[SCLP_CHP_INFO_MASK_SIZE]; | |
835 | u8 configured[SCLP_CHP_INFO_MASK_SIZE]; | |
836 | u8 ccm; | |
837 | u8 reserved[6]; | |
838 | u8 cssid; | |
839 | } __attribute__((packed)); | |
840 | ||
841 | /** | |
842 | * sclp_chp_read_info - perform read channel-path information sclp command | |
843 | * @info: resulting channel-path information data | |
844 | * | |
845 | * Perform read channel-path information sclp command and wait for completion. | |
846 | * On success, store channel-path information in @info and return 0. Return | |
847 | * non-zero otherwise. | |
848 | */ | |
849 | int sclp_chp_read_info(struct sclp_chp_info *info) | |
850 | { | |
851 | struct chp_info_sccb *sccb; | |
852 | int rc; | |
853 | ||
854 | if (!SCLP_HAS_CHP_INFO) | |
855 | return -EOPNOTSUPP; | |
856 | /* Prepare sccb. */ | |
857 | sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
858 | if (!sccb) | |
859 | return -ENOMEM; | |
860 | sccb->header.length = sizeof(*sccb); | |
861 | rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); | |
862 | if (rc) | |
863 | goto out; | |
864 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
865 | pr_warning("read channel-path info failed " |
866 | "(response=0x%04x)\n", sccb->header.response_code); | |
4b28a8fe HC |
867 | rc = -EIO; |
868 | goto out; | |
869 | } | |
870 | memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); | |
871 | memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); | |
872 | memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); | |
873 | out: | |
874 | free_page((unsigned long) sccb); | |
875 | return rc; | |
876 | } |