1 // SPDX-License-Identifier: GPL-2.0
31 #include <asm/page-states.h>
54 	int rc;  in sclp_sync_request_timeout()  local
58 		return -ENOMEM;  in sclp_sync_request_timeout()
60 		request->queue_timeout = timeout;  in sclp_sync_request_timeout()
61 	request->command = cmd;  in sclp_sync_request_timeout()
62 	request->sccb = sccb;  in sclp_sync_request_timeout()
63 	request->status = SCLP_REQ_FILLED;  in sclp_sync_request_timeout()
64 	request->callback = sclp_sync_callback;  in sclp_sync_request_timeout()
65 	request->callback_data = &completion;  in sclp_sync_request_timeout()
69 	rc = sclp_add_request(request);  in sclp_sync_request_timeout()
70 	if (rc)  in sclp_sync_request_timeout()
75 	if (request->status != SCLP_REQ_DONE) {  in sclp_sync_request_timeout()
76 		pr_warn("sync request failed (cmd=0x%08x, status=0x%02x)\n",  in sclp_sync_request_timeout()
77 			cmd, request->status);  in sclp_sync_request_timeout()
78 		rc = -EIO;  in sclp_sync_request_timeout()
82 	return rc;  in sclp_sync_request_timeout()
94 	int rc;  in _sclp_get_core_info()  local
99 		return -EOPNOTSUPP;  in _sclp_get_core_info()
103 		return -ENOMEM;  in _sclp_get_core_info()
104 	sccb->header.length = length;  in _sclp_get_core_info()
105 	sccb->header.control_mask[2] = 0x80;  in _sclp_get_core_info()
106 	rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb,  in _sclp_get_core_info()
108 	if (rc)  in _sclp_get_core_info()
110 	if (sccb->header.response_code != 0x0010) {  in _sclp_get_core_info()
111 		pr_warn("readcpuinfo failed (response=0x%04x)\n",  in _sclp_get_core_info()
112 			sccb->header.response_code);  in _sclp_get_core_info()
113 		rc = -EIO;  in _sclp_get_core_info()
119 	return rc;  in _sclp_get_core_info()
129 	int rc;  in do_core_configure()  local
132 		return -EOPNOTSUPP;  in do_core_configure()
139 		return -ENOMEM;  in do_core_configure()
140 	sccb->header.length = sizeof(*sccb);  in do_core_configure()
141 	rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL);  in do_core_configure()
142 	if (rc)  in do_core_configure()
144 	switch (sccb->header.response_code) {  in do_core_configure()
149 		pr_warn("configure cpu failed (cmd=0x%08x, response=0x%04x)\n",  in do_core_configure()
150 			cmd, sccb->header.response_code);  in do_core_configure()
151 		rc = -EIO;  in do_core_configure()
156 	return rc;  in do_core_configure()
196 	return (unsigned long long) (rn - 1) * sclp.rzm;  in rn2addr()
202 	int rc;  in do_assign_storage()  local
206 		return -ENOMEM;  in do_assign_storage()
207 	sccb->header.length = PAGE_SIZE;  in do_assign_storage()
208 	sccb->rn = rn;  in do_assign_storage()
209 	rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL);  in do_assign_storage()
210 	if (rc)  in do_assign_storage()
212 	switch (sccb->header.response_code) {  in do_assign_storage()
217 		pr_warn("assign storage failed (cmd=0x%08x, response=0x%04x, rn=0x%04x)\n",  in do_assign_storage()
218 			cmd, sccb->header.response_code, rn);  in do_assign_storage()
219 		rc = -EIO;  in do_assign_storage()
224 	return rc;  in do_assign_storage()
230 	int rc;  in sclp_assign_storage()  local
232 	rc = do_assign_storage(SCLP_CMDW_ASSIGN_STORAGE, rn);  in sclp_assign_storage()
233 	if (rc)  in sclp_assign_storage()
234 		return rc;  in sclp_assign_storage()
256 	int rc;  in sclp_attach_storage()  local
261 		return -ENOMEM;  in sclp_attach_storage()
262 	sccb->header.length = PAGE_SIZE;  in sclp_attach_storage()
263 	sccb->header.function_code = 0x40;  in sclp_attach_storage()
264 	rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb,  in sclp_attach_storage()
266 	if (rc)  in sclp_attach_storage()
268 	switch (sccb->header.response_code) {  in sclp_attach_storage()
271 		for (i = 0; i < sccb->assigned; i++) {  in sclp_attach_storage()
272 			if (sccb->entries[i])  in sclp_attach_storage()
273 				sclp_unassign_storage(sccb->entries[i] >> 16);  in sclp_attach_storage()
277 		rc = -EIO;  in sclp_attach_storage()
282 	return rc;  in sclp_attach_storage()
290 	int rc = 0;  in sclp_mem_change_state()  local
293 		istart = rn2addr(incr->rn);  in sclp_mem_change_state()
294 		if (start + size - 1 < istart)  in sclp_mem_change_state()
296 		if (start > istart + sclp.rzm - 1)  in sclp_mem_change_state()
299 			rc |= sclp_assign_storage(incr->rn);  in sclp_mem_change_state()
301 			sclp_unassign_storage(incr->rn);  in sclp_mem_change_state()
302 		if (rc == 0)  in sclp_mem_change_state()
303 			incr->standby = online ? 0 : 1;  in sclp_mem_change_state()
305 	return rc ? -EIO : 0;  in sclp_mem_change_state()
314 		istart = rn2addr(incr->rn);  in contains_standby_increment()
315 		if (end - 1 < istart)  in contains_standby_increment()
317 		if (start > istart + sclp.rzm - 1)  in contains_standby_increment()
319 		if (incr->standby)  in contains_standby_increment()
331 	int rc = 0;  in sclp_mem_notifier()  local
334 	start = arg->start_pfn << PAGE_SHIFT;  in sclp_mem_notifier()
335 	size = arg->nr_pages << PAGE_SHIFT;  in sclp_mem_notifier()
347 			rc = -EPERM;  in sclp_mem_notifier()
358 		if (arg->altmap_nr_pages) {  in sclp_mem_notifier()
359 			start = PFN_PHYS(arg->altmap_start_pfn);  in sclp_mem_notifier()
360 			size += PFN_PHYS(arg->altmap_nr_pages);  in sclp_mem_notifier()
362 		rc = sclp_mem_change_state(start, size, 1);  in sclp_mem_notifier()
363 		if (rc || !arg->altmap_nr_pages)  in sclp_mem_notifier()
370 		__arch_set_page_nodat((void *)__va(start), arg->altmap_nr_pages);  in sclp_mem_notifier()
377 		if (arg->altmap_nr_pages) {  in sclp_mem_notifier()
378 			start = PFN_PHYS(arg->altmap_start_pfn);  in sclp_mem_notifier()
379 			size += PFN_PHYS(arg->altmap_nr_pages);  in sclp_mem_notifier()
387 	return rc ? NOTIFY_BAD : NOTIFY_OK;  in sclp_mem_notifier()
401 	size_align = rounddown(*start + *size, alignment) - start_align;  in align_to_block_size()
403 	pr_info("Standby memory at 0x%llx (%lluM of %lluM usable)\n",  in align_to_block_size()
425 		size = ident_map_size - start;  in add_memory_merged()
444 		if (incr->standby)  in sclp_add_standby_memory()
445 			add_memory_merged(incr->rn);  in sclp_add_standby_memory()
458 	new_incr->rn = rn;  in insert_increment()
459 	new_incr->standby = standby;  in insert_increment()
463 		if (assigned && incr->rn > rn)  in insert_increment()
465 		if (!assigned && incr->rn - last_rn > 1)  in insert_increment()
467 		last_rn = incr->rn;  in insert_increment()
468 		prev = &incr->list;  in insert_increment()
471 		new_incr->rn = last_rn + 1;  in insert_increment()
472 	if (new_incr->rn > sclp.rnmax) {  in insert_increment()
476 	list_add(&new_incr->list, prev);  in insert_increment()
482 	int i, id, assigned, rc;  in sclp_detect_standby_memory()  local
488 	rc = -ENOMEM;  in sclp_detect_standby_memory()
495 		sccb->header.length = PAGE_SIZE;  in sclp_detect_standby_memory()
496 		rc = sclp_sync_request(SCLP_CMDW_READ_STORAGE_INFO | id << 8, sccb);  in sclp_detect_standby_memory()
497 		if (rc)  in sclp_detect_standby_memory()
499 		switch (sccb->header.response_code) {  in sclp_detect_standby_memory()
502 			for (i = 0; i < sccb->assigned; i++) {  in sclp_detect_standby_memory()
503 				if (!sccb->entries[i])  in sclp_detect_standby_memory()
506 				insert_increment(sccb->entries[i] >> 16, 0, 1);  in sclp_detect_standby_memory()
512 			for (i = 0; i < sccb->assigned; i++) {  in sclp_detect_standby_memory()
513 				if (!sccb->entries[i])  in sclp_detect_standby_memory()
516 				insert_increment(sccb->entries[i] >> 16, 1, 1);  in sclp_detect_standby_memory()
520 			rc = -EIO;  in sclp_detect_standby_memory()
523 		if (!rc)  in sclp_detect_standby_memory()
524 			sclp_max_storage_id = sccb->max_id;  in sclp_detect_standby_memory()
526 	if (rc || list_empty(&sclp_mem_list))  in sclp_detect_standby_memory()
528 	for (i = 1; i <= sclp.rnmax - assigned; i++)  in sclp_detect_standby_memory()
530 	rc = register_memory_notifier(&sclp_mem_nb);  in sclp_detect_standby_memory()
531 	if (rc)  in sclp_detect_standby_memory()
536 	return rc;  in sclp_detect_standby_memory()
560 	int rc;  in do_chp_configure()  local
563 		return -EOPNOTSUPP;  in do_chp_configure()
567 		return -ENOMEM;  in do_chp_configure()
568 	sccb->header.length = sizeof(*sccb);  in do_chp_configure()
569 	rc = sclp_sync_request(cmd, sccb);  in do_chp_configure()
570 	if (rc)  in do_chp_configure()
572 	switch (sccb->header.response_code) {  in do_chp_configure()
579 		pr_warn("configure channel-path failed (cmd=0x%08x, response=0x%04x)\n",  in do_chp_configure()
580 			cmd, sccb->header.response_code);  in do_chp_configure()
581 		rc = -EIO;  in do_chp_configure()
586 	return rc;  in do_chp_configure()
590  * sclp_chp_configure - perform configure channel-path sclp command
591  * @chpid: channel-path ID
593  * Perform configure channel-path command sclp command for specified chpid.
594  * Return 0 after command successfully finished, non-zero otherwise.
602  * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
603  * @chpid: channel-path ID
605  * Perform deconfigure channel-path command sclp command for specified chpid
606  * and wait for completion. On success return 0. Return non-zero otherwise.
624  * sclp_chp_read_info - perform read channel-path information sclp command
625  * @info: resulting channel-path information data
627  * Perform read channel-path information sclp command and wait for completion.
628  * On success, store channel-path information in @info and return 0. Return
629  * non-zero otherwise.
634 	int rc;  in sclp_chp_read_info()  local
637 		return -EOPNOTSUPP;  in sclp_chp_read_info()
641 		return -ENOMEM;  in sclp_chp_read_info()
642 	sccb->header.length = sizeof(*sccb);  in sclp_chp_read_info()
643 	rc = sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);  in sclp_chp_read_info()
644 	if (rc)  in sclp_chp_read_info()
646 	if (sccb->header.response_code != 0x0010) {  in sclp_chp_read_info()
647 		pr_warn("read channel-path info failed (response=0x%04x)\n",  in sclp_chp_read_info()
648 			sccb->header.response_code);  in sclp_chp_read_info()
649 		rc = -EIO;  in sclp_chp_read_info()
652 	memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE);  in sclp_chp_read_info()
653 	memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE);  in sclp_chp_read_info()
654 	memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE);  in sclp_chp_read_info()
657 	return rc;  in sclp_chp_read_info()