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 | 30 | |
08d07968 HC |
31 | static void sclp_sync_callback(struct sclp_req *req, void *data) |
32 | { | |
33 | struct completion *completion = data; | |
34 | ||
35 | complete(completion); | |
36 | } | |
37 | ||
d475f942 | 38 | int sclp_sync_request(sclp_cmdw_t cmd, void *sccb) |
9f0128f9 GS |
39 | { |
40 | return sclp_sync_request_timeout(cmd, sccb, 0); | |
41 | } | |
42 | ||
43 | int sclp_sync_request_timeout(sclp_cmdw_t cmd, void *sccb, int timeout) | |
08d07968 HC |
44 | { |
45 | struct completion completion; | |
46 | struct sclp_req *request; | |
47 | int rc; | |
48 | ||
49 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
50 | if (!request) | |
51 | return -ENOMEM; | |
9f0128f9 GS |
52 | if (timeout) |
53 | request->queue_timeout = timeout; | |
08d07968 HC |
54 | request->command = cmd; |
55 | request->sccb = sccb; | |
56 | request->status = SCLP_REQ_FILLED; | |
57 | request->callback = sclp_sync_callback; | |
58 | request->callback_data = &completion; | |
59 | init_completion(&completion); | |
60 | ||
61 | /* Perform sclp request. */ | |
62 | rc = sclp_add_request(request); | |
63 | if (rc) | |
64 | goto out; | |
65 | wait_for_completion(&completion); | |
66 | ||
67 | /* Check response. */ | |
68 | if (request->status != SCLP_REQ_DONE) { | |
b3ff088b MS |
69 | pr_warning("sync request failed (cmd=0x%08x, " |
70 | "status=0x%02x)\n", cmd, request->status); | |
08d07968 HC |
71 | rc = -EIO; |
72 | } | |
73 | out: | |
74 | kfree(request); | |
75 | return rc; | |
76 | } | |
77 | ||
78 | /* | |
79 | * CPU configuration related functions. | |
80 | */ | |
81 | ||
82 | #define SCLP_CMDW_READ_CPU_INFO 0x00010001 | |
83 | #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 | |
84 | #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 | |
85 | ||
86 | struct read_cpu_info_sccb { | |
87 | struct sccb_header header; | |
88 | u16 nr_configured; | |
89 | u16 offset_configured; | |
90 | u16 nr_standby; | |
91 | u16 offset_standby; | |
92 | u8 reserved[4096 - 16]; | |
93 | } __attribute__((packed, aligned(PAGE_SIZE))); | |
94 | ||
08d07968 HC |
95 | static void sclp_fill_cpu_info(struct sclp_cpu_info *info, |
96 | struct read_cpu_info_sccb *sccb) | |
97 | { | |
98 | char *page = (char *) sccb; | |
99 | ||
100 | memset(info, 0, sizeof(*info)); | |
101 | info->configured = sccb->nr_configured; | |
102 | info->standby = sccb->nr_standby; | |
103 | info->combined = sccb->nr_configured + sccb->nr_standby; | |
104 | info->has_cpu_type = sclp_fac84 & 0x1; | |
105 | memcpy(&info->cpu, page + sccb->offset_configured, | |
106 | info->combined * sizeof(struct sclp_cpu_entry)); | |
107 | } | |
108 | ||
48483b32 | 109 | int sclp_get_cpu_info(struct sclp_cpu_info *info) |
08d07968 HC |
110 | { |
111 | int rc; | |
112 | struct read_cpu_info_sccb *sccb; | |
113 | ||
114 | if (!SCLP_HAS_CPU_INFO) | |
115 | return -EOPNOTSUPP; | |
48483b32 | 116 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
08d07968 HC |
117 | if (!sccb) |
118 | return -ENOMEM; | |
08d07968 | 119 | sccb->header.length = sizeof(*sccb); |
9f0128f9 GS |
120 | rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb, |
121 | SCLP_QUEUE_INTERVAL); | |
08d07968 HC |
122 | if (rc) |
123 | goto out; | |
124 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
125 | pr_warning("readcpuinfo failed (response=0x%04x)\n", |
126 | sccb->header.response_code); | |
08d07968 HC |
127 | rc = -EIO; |
128 | goto out; | |
129 | } | |
130 | sclp_fill_cpu_info(info, sccb); | |
131 | out: | |
132 | free_page((unsigned long) sccb); | |
133 | return rc; | |
134 | } | |
135 | ||
08d07968 HC |
136 | struct cpu_configure_sccb { |
137 | struct sccb_header header; | |
138 | } __attribute__((packed, aligned(8))); | |
139 | ||
140 | static int do_cpu_configure(sclp_cmdw_t cmd) | |
141 | { | |
142 | struct cpu_configure_sccb *sccb; | |
143 | int rc; | |
144 | ||
145 | if (!SCLP_HAS_CPU_RECONFIG) | |
146 | return -EOPNOTSUPP; | |
147 | /* | |
148 | * This is not going to cross a page boundary since we force | |
149 | * kmalloc to have a minimum alignment of 8 bytes on s390. | |
150 | */ | |
151 | sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); | |
152 | if (!sccb) | |
153 | return -ENOMEM; | |
154 | sccb->header.length = sizeof(*sccb); | |
9f0128f9 | 155 | rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL); |
08d07968 HC |
156 | if (rc) |
157 | goto out; | |
158 | switch (sccb->header.response_code) { | |
159 | case 0x0020: | |
160 | case 0x0120: | |
161 | break; | |
162 | default: | |
b3ff088b MS |
163 | pr_warning("configure cpu failed (cmd=0x%08x, " |
164 | "response=0x%04x)\n", cmd, | |
165 | sccb->header.response_code); | |
08d07968 HC |
166 | rc = -EIO; |
167 | break; | |
168 | } | |
169 | out: | |
170 | kfree(sccb); | |
171 | return rc; | |
172 | } | |
173 | ||
174 | int sclp_cpu_configure(u8 cpu) | |
175 | { | |
176 | return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); | |
177 | } | |
178 | ||
179 | int sclp_cpu_deconfigure(u8 cpu) | |
180 | { | |
181 | return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); | |
182 | } | |
4b28a8fe | 183 | |
e0bc2495 HC |
184 | #ifdef CONFIG_MEMORY_HOTPLUG |
185 | ||
186 | static DEFINE_MUTEX(sclp_mem_mutex); | |
187 | static LIST_HEAD(sclp_mem_list); | |
188 | static u8 sclp_max_storage_id; | |
189 | static unsigned long sclp_storage_ids[256 / BITS_PER_LONG]; | |
03997904 | 190 | static int sclp_mem_state_changed; |
e0bc2495 HC |
191 | |
192 | struct memory_increment { | |
193 | struct list_head list; | |
194 | u16 rn; | |
195 | int standby; | |
e0bc2495 HC |
196 | }; |
197 | ||
198 | struct assign_storage_sccb { | |
199 | struct sccb_header header; | |
200 | u16 rn; | |
201 | } __packed; | |
202 | ||
9c95258c HC |
203 | int arch_get_memory_phys_device(unsigned long start_pfn) |
204 | { | |
acf6a004 | 205 | if (!sclp_rzm) |
9c95258c | 206 | return 0; |
acf6a004 | 207 | return PFN_PHYS(start_pfn) >> ilog2(sclp_rzm); |
9c95258c HC |
208 | } |
209 | ||
e0bc2495 HC |
210 | static unsigned long long rn2addr(u16 rn) |
211 | { | |
acf6a004 | 212 | return (unsigned long long) (rn - 1) * sclp_rzm; |
e0bc2495 HC |
213 | } |
214 | ||
215 | static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) | |
216 | { | |
217 | struct assign_storage_sccb *sccb; | |
218 | int rc; | |
219 | ||
220 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
221 | if (!sccb) | |
222 | return -ENOMEM; | |
223 | sccb->header.length = PAGE_SIZE; | |
224 | sccb->rn = rn; | |
9f0128f9 | 225 | rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL); |
e0bc2495 HC |
226 | if (rc) |
227 | goto out; | |
228 | switch (sccb->header.response_code) { | |
229 | case 0x0020: | |
230 | case 0x0120: | |
231 | break; | |
232 | default: | |
675be97a HC |
233 | pr_warning("assign storage failed (cmd=0x%08x, " |
234 | "response=0x%04x, rn=0x%04x)\n", cmd, | |
235 | sccb->header.response_code, rn); | |
e0bc2495 HC |
236 | rc = -EIO; |
237 | break; | |
238 | } | |
239 | out: | |
240 | free_page((unsigned long) sccb); | |
241 | return rc; | |
242 | } | |
243 | ||
244 | static int sclp_assign_storage(u16 rn) | |
245 | { | |
6b70a920 | 246 | unsigned long long start; |
0cd2f620 HC |
247 | int rc; |
248 | ||
249 | rc = do_assign_storage(0x000d0001, rn); | |
250 | if (rc) | |
6b70a920 HC |
251 | return rc; |
252 | start = rn2addr(rn); | |
acf6a004 | 253 | storage_key_init_range(start, start + sclp_rzm); |
6b70a920 | 254 | return 0; |
e0bc2495 HC |
255 | } |
256 | ||
257 | static int sclp_unassign_storage(u16 rn) | |
258 | { | |
259 | return do_assign_storage(0x000c0001, rn); | |
260 | } | |
261 | ||
262 | struct attach_storage_sccb { | |
263 | struct sccb_header header; | |
264 | u16 :16; | |
265 | u16 assigned; | |
266 | u32 :32; | |
267 | u32 entries[0]; | |
268 | } __packed; | |
269 | ||
270 | static int sclp_attach_storage(u8 id) | |
271 | { | |
272 | struct attach_storage_sccb *sccb; | |
273 | int rc; | |
274 | int i; | |
275 | ||
276 | sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
277 | if (!sccb) | |
278 | return -ENOMEM; | |
279 | sccb->header.length = PAGE_SIZE; | |
9f0128f9 GS |
280 | rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb, |
281 | SCLP_QUEUE_INTERVAL); | |
e0bc2495 HC |
282 | if (rc) |
283 | goto out; | |
284 | switch (sccb->header.response_code) { | |
285 | case 0x0020: | |
286 | set_bit(id, sclp_storage_ids); | |
8adb4ca3 HC |
287 | for (i = 0; i < sccb->assigned; i++) { |
288 | if (sccb->entries[i]) | |
289 | sclp_unassign_storage(sccb->entries[i] >> 16); | |
290 | } | |
e0bc2495 HC |
291 | break; |
292 | default: | |
293 | rc = -EIO; | |
294 | break; | |
295 | } | |
296 | out: | |
297 | free_page((unsigned long) sccb); | |
298 | return rc; | |
299 | } | |
300 | ||
301 | static int sclp_mem_change_state(unsigned long start, unsigned long size, | |
302 | int online) | |
303 | { | |
304 | struct memory_increment *incr; | |
305 | unsigned long long istart; | |
306 | int rc = 0; | |
307 | ||
308 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
309 | istart = rn2addr(incr->rn); | |
310 | if (start + size - 1 < istart) | |
311 | break; | |
acf6a004 | 312 | if (start > istart + sclp_rzm - 1) |
e0bc2495 | 313 | continue; |
15535560 | 314 | if (online) |
e0bc2495 | 315 | rc |= sclp_assign_storage(incr->rn); |
15535560 | 316 | else |
e0bc2495 | 317 | sclp_unassign_storage(incr->rn); |
e0bc2495 HC |
318 | } |
319 | return rc ? -EIO : 0; | |
320 | } | |
321 | ||
322 | static int sclp_mem_notifier(struct notifier_block *nb, | |
323 | unsigned long action, void *data) | |
324 | { | |
325 | unsigned long start, size; | |
326 | struct memory_notify *arg; | |
327 | unsigned char id; | |
328 | int rc = 0; | |
329 | ||
330 | arg = data; | |
331 | start = arg->start_pfn << PAGE_SHIFT; | |
332 | size = arg->nr_pages << PAGE_SHIFT; | |
333 | mutex_lock(&sclp_mem_mutex); | |
fc89db4b AM |
334 | for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1) |
335 | sclp_attach_storage(id); | |
e0bc2495 HC |
336 | switch (action) { |
337 | case MEM_ONLINE: | |
7e9238fb GS |
338 | case MEM_GOING_OFFLINE: |
339 | case MEM_CANCEL_OFFLINE: | |
e0bc2495 HC |
340 | break; |
341 | case MEM_GOING_ONLINE: | |
342 | rc = sclp_mem_change_state(start, size, 1); | |
343 | break; | |
344 | case MEM_CANCEL_ONLINE: | |
345 | sclp_mem_change_state(start, size, 0); | |
346 | break; | |
7e9238fb GS |
347 | case MEM_OFFLINE: |
348 | sclp_mem_change_state(start, size, 0); | |
349 | break; | |
e0bc2495 HC |
350 | default: |
351 | rc = -EINVAL; | |
352 | break; | |
353 | } | |
03997904 GS |
354 | if (!rc) |
355 | sclp_mem_state_changed = 1; | |
e0bc2495 HC |
356 | mutex_unlock(&sclp_mem_mutex); |
357 | return rc ? NOTIFY_BAD : NOTIFY_OK; | |
358 | } | |
359 | ||
360 | static struct notifier_block sclp_mem_nb = { | |
361 | .notifier_call = sclp_mem_notifier, | |
362 | }; | |
363 | ||
364 | static void __init add_memory_merged(u16 rn) | |
365 | { | |
366 | static u16 first_rn, num; | |
367 | unsigned long long start, size; | |
368 | ||
369 | if (rn && first_rn && (first_rn + num == rn)) { | |
370 | num++; | |
371 | return; | |
372 | } | |
373 | if (!first_rn) | |
374 | goto skip_add; | |
375 | start = rn2addr(first_rn); | |
acf6a004 | 376 | size = (unsigned long long) num * sclp_rzm; |
e0bc2495 HC |
377 | if (start >= VMEM_MAX_PHYS) |
378 | goto skip_add; | |
379 | if (start + size > VMEM_MAX_PHYS) | |
380 | size = VMEM_MAX_PHYS - start; | |
23d75d9c HC |
381 | if (memory_end_set && (start >= memory_end)) |
382 | goto skip_add; | |
383 | if (memory_end_set && (start + size > memory_end)) | |
384 | size = memory_end - start; | |
e0bc2495 HC |
385 | add_memory(0, start, size); |
386 | skip_add: | |
387 | first_rn = rn; | |
388 | num = 1; | |
389 | } | |
390 | ||
391 | static void __init sclp_add_standby_memory(void) | |
392 | { | |
393 | struct memory_increment *incr; | |
394 | ||
395 | list_for_each_entry(incr, &sclp_mem_list, list) | |
396 | if (incr->standby) | |
397 | add_memory_merged(incr->rn); | |
398 | add_memory_merged(0); | |
399 | } | |
400 | ||
401 | static void __init insert_increment(u16 rn, int standby, int assigned) | |
402 | { | |
403 | struct memory_increment *incr, *new_incr; | |
404 | struct list_head *prev; | |
405 | u16 last_rn; | |
406 | ||
407 | new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL); | |
408 | if (!new_incr) | |
409 | return; | |
410 | new_incr->rn = rn; | |
411 | new_incr->standby = standby; | |
412 | last_rn = 0; | |
413 | prev = &sclp_mem_list; | |
414 | list_for_each_entry(incr, &sclp_mem_list, list) { | |
415 | if (assigned && incr->rn > rn) | |
416 | break; | |
417 | if (!assigned && incr->rn - last_rn > 1) | |
418 | break; | |
419 | last_rn = incr->rn; | |
420 | prev = &incr->list; | |
421 | } | |
422 | if (!assigned) | |
423 | new_incr->rn = last_rn + 1; | |
acf6a004 | 424 | if (new_incr->rn > sclp_rnmax) { |
e0bc2495 HC |
425 | kfree(new_incr); |
426 | return; | |
427 | } | |
428 | list_add(&new_incr->list, prev); | |
429 | } | |
430 | ||
03997904 GS |
431 | static int sclp_mem_freeze(struct device *dev) |
432 | { | |
433 | if (!sclp_mem_state_changed) | |
434 | return 0; | |
435 | pr_err("Memory hotplug state changed, suspend refused.\n"); | |
436 | return -EPERM; | |
437 | } | |
438 | ||
e0bc2495 HC |
439 | struct read_storage_sccb { |
440 | struct sccb_header header; | |
441 | u16 max_id; | |
442 | u16 assigned; | |
443 | u16 standby; | |
444 | u16 :16; | |
445 | u32 entries[0]; | |
446 | } __packed; | |
447 | ||
47145210 | 448 | static const struct dev_pm_ops sclp_mem_pm_ops = { |
03997904 GS |
449 | .freeze = sclp_mem_freeze, |
450 | }; | |
451 | ||
452 | static struct platform_driver sclp_mem_pdrv = { | |
453 | .driver = { | |
454 | .name = "sclp_mem", | |
455 | .pm = &sclp_mem_pm_ops, | |
456 | }, | |
457 | }; | |
458 | ||
e0bc2495 HC |
459 | static int __init sclp_detect_standby_memory(void) |
460 | { | |
03997904 | 461 | struct platform_device *sclp_pdev; |
e0bc2495 HC |
462 | struct read_storage_sccb *sccb; |
463 | int i, id, assigned, rc; | |
464 | ||
52319b45 MH |
465 | if (OLDMEM_BASE) /* No standby memory in kdump mode */ |
466 | return 0; | |
e0bc2495 HC |
467 | if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) |
468 | return 0; | |
469 | rc = -ENOMEM; | |
470 | sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA); | |
471 | if (!sccb) | |
472 | goto out; | |
473 | assigned = 0; | |
474 | for (id = 0; id <= sclp_max_storage_id; id++) { | |
475 | memset(sccb, 0, PAGE_SIZE); | |
476 | sccb->header.length = PAGE_SIZE; | |
d475f942 | 477 | rc = sclp_sync_request(0x00040001 | id << 8, sccb); |
e0bc2495 HC |
478 | if (rc) |
479 | goto out; | |
480 | switch (sccb->header.response_code) { | |
481 | case 0x0010: | |
482 | set_bit(id, sclp_storage_ids); | |
483 | for (i = 0; i < sccb->assigned; i++) { | |
484 | if (!sccb->entries[i]) | |
485 | continue; | |
486 | assigned++; | |
487 | insert_increment(sccb->entries[i] >> 16, 0, 1); | |
488 | } | |
489 | break; | |
490 | case 0x0310: | |
491 | break; | |
492 | case 0x0410: | |
493 | for (i = 0; i < sccb->assigned; i++) { | |
494 | if (!sccb->entries[i]) | |
495 | continue; | |
496 | assigned++; | |
497 | insert_increment(sccb->entries[i] >> 16, 1, 1); | |
498 | } | |
499 | break; | |
500 | default: | |
501 | rc = -EIO; | |
502 | break; | |
503 | } | |
504 | if (!rc) | |
505 | sclp_max_storage_id = sccb->max_id; | |
506 | } | |
507 | if (rc || list_empty(&sclp_mem_list)) | |
508 | goto out; | |
acf6a004 | 509 | for (i = 1; i <= sclp_rnmax - assigned; i++) |
e0bc2495 HC |
510 | insert_increment(0, 1, 0); |
511 | rc = register_memory_notifier(&sclp_mem_nb); | |
512 | if (rc) | |
513 | goto out; | |
03997904 GS |
514 | rc = platform_driver_register(&sclp_mem_pdrv); |
515 | if (rc) | |
516 | goto out; | |
517 | sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0); | |
5896f8fe | 518 | rc = PTR_ERR_OR_ZERO(sclp_pdev); |
03997904 GS |
519 | if (rc) |
520 | goto out_driver; | |
e0bc2495 | 521 | sclp_add_standby_memory(); |
03997904 GS |
522 | goto out; |
523 | out_driver: | |
524 | platform_driver_unregister(&sclp_mem_pdrv); | |
e0bc2495 HC |
525 | out: |
526 | free_page((unsigned long) sccb); | |
527 | return rc; | |
528 | } | |
529 | __initcall(sclp_detect_standby_memory); | |
530 | ||
531 | #endif /* CONFIG_MEMORY_HOTPLUG */ | |
532 | ||
7441b062 JG |
533 | /* |
534 | * PCI I/O adapter configuration related functions. | |
535 | */ | |
536 | #define SCLP_CMDW_CONFIGURE_PCI 0x001a0001 | |
537 | #define SCLP_CMDW_DECONFIGURE_PCI 0x001b0001 | |
538 | ||
539 | #define SCLP_RECONFIG_PCI_ATPYE 2 | |
540 | ||
541 | struct pci_cfg_sccb { | |
542 | struct sccb_header header; | |
543 | u8 atype; /* adapter type */ | |
544 | u8 reserved1; | |
545 | u16 reserved2; | |
546 | u32 aid; /* adapter identifier */ | |
547 | } __packed; | |
548 | ||
549 | static int do_pci_configure(sclp_cmdw_t cmd, u32 fid) | |
550 | { | |
551 | struct pci_cfg_sccb *sccb; | |
552 | int rc; | |
553 | ||
554 | if (!SCLP_HAS_PCI_RECONFIG) | |
555 | return -EOPNOTSUPP; | |
556 | ||
557 | sccb = (struct pci_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
558 | if (!sccb) | |
559 | return -ENOMEM; | |
560 | ||
561 | sccb->header.length = PAGE_SIZE; | |
562 | sccb->atype = SCLP_RECONFIG_PCI_ATPYE; | |
563 | sccb->aid = fid; | |
d475f942 | 564 | rc = sclp_sync_request(cmd, sccb); |
7441b062 JG |
565 | if (rc) |
566 | goto out; | |
567 | switch (sccb->header.response_code) { | |
568 | case 0x0020: | |
569 | case 0x0120: | |
570 | break; | |
571 | default: | |
572 | pr_warn("configure PCI I/O adapter failed: cmd=0x%08x response=0x%04x\n", | |
573 | cmd, sccb->header.response_code); | |
574 | rc = -EIO; | |
575 | break; | |
576 | } | |
577 | out: | |
578 | free_page((unsigned long) sccb); | |
579 | return rc; | |
580 | } | |
581 | ||
582 | int sclp_pci_configure(u32 fid) | |
583 | { | |
584 | return do_pci_configure(SCLP_CMDW_CONFIGURE_PCI, fid); | |
585 | } | |
586 | EXPORT_SYMBOL(sclp_pci_configure); | |
587 | ||
588 | int sclp_pci_deconfigure(u32 fid) | |
589 | { | |
590 | return do_pci_configure(SCLP_CMDW_DECONFIGURE_PCI, fid); | |
591 | } | |
592 | EXPORT_SYMBOL(sclp_pci_deconfigure); | |
593 | ||
4b28a8fe HC |
594 | /* |
595 | * Channel path configuration related functions. | |
596 | */ | |
597 | ||
598 | #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 | |
599 | #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 | |
600 | #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 | |
601 | ||
602 | struct chp_cfg_sccb { | |
603 | struct sccb_header header; | |
604 | u8 ccm; | |
605 | u8 reserved[6]; | |
606 | u8 cssid; | |
607 | } __attribute__((packed)); | |
608 | ||
609 | static int do_chp_configure(sclp_cmdw_t cmd) | |
610 | { | |
611 | struct chp_cfg_sccb *sccb; | |
612 | int rc; | |
613 | ||
614 | if (!SCLP_HAS_CHP_RECONFIG) | |
615 | return -EOPNOTSUPP; | |
616 | /* Prepare sccb. */ | |
617 | sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
618 | if (!sccb) | |
619 | return -ENOMEM; | |
620 | sccb->header.length = sizeof(*sccb); | |
d475f942 | 621 | rc = sclp_sync_request(cmd, sccb); |
4b28a8fe HC |
622 | if (rc) |
623 | goto out; | |
624 | switch (sccb->header.response_code) { | |
625 | case 0x0020: | |
626 | case 0x0120: | |
627 | case 0x0440: | |
628 | case 0x0450: | |
629 | break; | |
630 | default: | |
b3ff088b MS |
631 | pr_warning("configure channel-path failed " |
632 | "(cmd=0x%08x, response=0x%04x)\n", cmd, | |
633 | sccb->header.response_code); | |
4b28a8fe HC |
634 | rc = -EIO; |
635 | break; | |
636 | } | |
637 | out: | |
638 | free_page((unsigned long) sccb); | |
639 | return rc; | |
640 | } | |
641 | ||
642 | /** | |
643 | * sclp_chp_configure - perform configure channel-path sclp command | |
644 | * @chpid: channel-path ID | |
645 | * | |
646 | * Perform configure channel-path command sclp command for specified chpid. | |
647 | * Return 0 after command successfully finished, non-zero otherwise. | |
648 | */ | |
649 | int sclp_chp_configure(struct chp_id chpid) | |
650 | { | |
651 | return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); | |
652 | } | |
653 | ||
654 | /** | |
655 | * sclp_chp_deconfigure - perform deconfigure channel-path sclp command | |
656 | * @chpid: channel-path ID | |
657 | * | |
658 | * Perform deconfigure channel-path command sclp command for specified chpid | |
659 | * and wait for completion. On success return 0. Return non-zero otherwise. | |
660 | */ | |
661 | int sclp_chp_deconfigure(struct chp_id chpid) | |
662 | { | |
663 | return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); | |
664 | } | |
665 | ||
666 | struct chp_info_sccb { | |
667 | struct sccb_header header; | |
668 | u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; | |
669 | u8 standby[SCLP_CHP_INFO_MASK_SIZE]; | |
670 | u8 configured[SCLP_CHP_INFO_MASK_SIZE]; | |
671 | u8 ccm; | |
672 | u8 reserved[6]; | |
673 | u8 cssid; | |
674 | } __attribute__((packed)); | |
675 | ||
676 | /** | |
677 | * sclp_chp_read_info - perform read channel-path information sclp command | |
678 | * @info: resulting channel-path information data | |
679 | * | |
680 | * Perform read channel-path information sclp command and wait for completion. | |
681 | * On success, store channel-path information in @info and return 0. Return | |
682 | * non-zero otherwise. | |
683 | */ | |
684 | int sclp_chp_read_info(struct sclp_chp_info *info) | |
685 | { | |
686 | struct chp_info_sccb *sccb; | |
687 | int rc; | |
688 | ||
689 | if (!SCLP_HAS_CHP_INFO) | |
690 | return -EOPNOTSUPP; | |
691 | /* Prepare sccb. */ | |
692 | sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
693 | if (!sccb) | |
694 | return -ENOMEM; | |
695 | sccb->header.length = sizeof(*sccb); | |
d475f942 | 696 | rc = sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); |
4b28a8fe HC |
697 | if (rc) |
698 | goto out; | |
699 | if (sccb->header.response_code != 0x0010) { | |
b3ff088b MS |
700 | pr_warning("read channel-path info failed " |
701 | "(response=0x%04x)\n", sccb->header.response_code); | |
4b28a8fe HC |
702 | rc = -EIO; |
703 | goto out; | |
704 | } | |
705 | memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); | |
706 | memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); | |
707 | memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); | |
708 | out: | |
709 | free_page((unsigned long) sccb); | |
710 | return rc; | |
711 | } | |
07be0382 MS |
712 | |
713 | bool sclp_has_sprp(void) | |
714 | { | |
715 | return !!(sclp_fac84 & 0x2); | |
716 | } |