1 // SPDX-License-Identifier: GPL-2.0-or-later
28 #define to_dump_obj(x) container_of(x, struct dump_obj, kobj)  argument
37 #define to_dump_attr(x) container_of(x, struct dump_attribute, attr)  argument
43 	return sprintf(buf, "0x%x\n", dump_obj->id);  in dump_id_show()
61 	return sprintf(buf, "0x%x %s\n", dump_obj->type,  in dump_type_show()
62 		       dump_type_to_string(dump_obj->type));  in dump_type_show()
69 	return sprintf(buf, "ack - acknowledge dump\n");  in dump_ack_show()
77 	int rc;  in dump_send_ack()  local
79 	rc = opal_dump_ack(dump_id);  in dump_send_ack()
80 	if (rc)  in dump_send_ack()
81 		pr_warn("%s: Failed to send ack to Dump ID 0x%x (%d)\n",  in dump_send_ack()
82 			__func__, dump_id, rc);  in dump_send_ack()
83 	return rc;  in dump_send_ack()
95 	if (sysfs_remove_file_self(&dump_obj->kobj, &attr->attr)) {  in dump_ack_store()
96 		dump_send_ack(dump_obj->id);  in dump_ack_store()
97 		kobject_put(&dump_obj->kobj);  in dump_ack_store()
117 	return sprintf(buf, "1 - initiate Service Processor(FSP) dump\n");  in init_dump_show()
122 	int rc;  in dump_fips_init()  local
124 	rc = opal_dump_init(type);  in dump_fips_init()
125 	if (rc)  in dump_fips_init()
127 			__func__, rc);  in dump_fips_init()
128 	return rc;  in dump_fips_init()
136 	int rc;  in init_dump_store()  local
138 	rc = dump_fips_init(DUMP_TYPE_FSP);  in init_dump_store()
139 	if (rc == OPAL_SUCCESS)  in init_dump_store()
169 	if (!attribute->show)  in dump_attr_show()
170 		return -EIO;  in dump_attr_show()
172 	return attribute->show(dump, attribute, buf);  in dump_attr_show()
185 	if (!attribute->store)  in dump_attr_store()
186 		return -EIO;  in dump_attr_store()
188 	return attribute->store(dump, attribute, buf, len);  in dump_attr_store()
201 	vfree(dump->buffer);  in dump_release()
222 	int rc;  in dump_read_info()  local
226 	rc = opal_dump_info2(&id, &size, &type);  in dump_read_info()
227 	if (rc == OPAL_PARAMETER)  in dump_read_info()
228 		rc = opal_dump_info(&id, &size);  in dump_read_info()
230 	if (rc) {  in dump_read_info()
232 			__func__, rc);  in dump_read_info()
233 		return rc;  in dump_read_info()
240 	return rc;  in dump_read_info()
247 	int64_t rc;  in dump_read_data()  local
250 	dump->buffer = vzalloc(PAGE_ALIGN(dump->size));  in dump_read_data()
251 	if (!dump->buffer) {  in dump_read_data()
253 		rc = -ENOMEM;  in dump_read_data()
258 	list = opal_vmalloc_to_sg_list(dump->buffer, dump->size);  in dump_read_data()
260 		rc = -ENOMEM;  in dump_read_data()
268 	rc = OPAL_BUSY_EVENT;  in dump_read_data()
269 	while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {  in dump_read_data()
270 		rc = opal_dump_read(dump->id, addr);  in dump_read_data()
271 		if (rc == OPAL_BUSY_EVENT) {  in dump_read_data()
277 	if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL)  in dump_read_data()
278 		pr_warn("%s: Extract dump failed for ID 0x%x\n",  in dump_read_data()
279 			__func__, dump->id);  in dump_read_data()
285 	return rc;  in dump_read_data()
292 	ssize_t rc;  in dump_attr_read()  local
296 	if (!dump->buffer) {  in dump_attr_read()
297 		rc = dump_read_data(dump);  in dump_attr_read()
299 		if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL) {  in dump_attr_read()
300 			vfree(dump->buffer);  in dump_attr_read()
301 			dump->buffer = NULL;  in dump_attr_read()
303 			return -EIO;  in dump_attr_read()
305 		if (rc == OPAL_PARTIAL) {  in dump_attr_read()
310 			pr_info("%s: Platform dump partially read. ID = 0x%x\n",  in dump_attr_read()
311 				__func__, dump->id);  in dump_attr_read()
312 			return -EIO;  in dump_attr_read()
316 	memcpy(buffer, dump->buffer + pos, count);  in dump_attr_read()
330 	int rc;  in create_dump_obj()  local
336 	dump->kobj.kset = dump_kset;  in create_dump_obj()
338 	kobject_init(&dump->kobj, &dump_ktype);  in create_dump_obj()
340 	sysfs_bin_attr_init(&dump->dump_attr);  in create_dump_obj()
342 	dump->dump_attr.attr.name = "dump";  in create_dump_obj()
343 	dump->dump_attr.attr.mode = 0400;  in create_dump_obj()
344 	dump->dump_attr.size = size;  in create_dump_obj()
345 	dump->dump_attr.read = dump_attr_read;  in create_dump_obj()
347 	dump->id = id;  in create_dump_obj()
348 	dump->size = size;  in create_dump_obj()
349 	dump->type = type;  in create_dump_obj()
351 	rc = kobject_add(&dump->kobj, NULL, "0x%x-0x%x", type, id);  in create_dump_obj()
352 	if (rc) {  in create_dump_obj()
353 		kobject_put(&dump->kobj);  in create_dump_obj()
362 	 * dump_ack_store->kobject_put() and kobject_uevent() which leads to a  in create_dump_obj()
363 	 * use-after-free of a kernfs object resulting in a kernel crash.  in create_dump_obj()
372 	kobject_get(&dump->kobj);  in create_dump_obj()
373 	rc = sysfs_create_bin_file(&dump->kobj, &dump->dump_attr);  in create_dump_obj()
374 	if (rc == 0) {  in create_dump_obj()
375 		kobject_uevent(&dump->kobj, KOBJ_ADD);  in create_dump_obj()
377 		pr_info("%s: New platform dump. ID = 0x%x Size %u\n",  in create_dump_obj()
378 			__func__, dump->id, dump->size);  in create_dump_obj()
381 		kobject_put(&dump->kobj);  in create_dump_obj()
385 	kobject_put(&dump->kobj);  in create_dump_obj()
391 	int rc;  in process_dump()  local
396 	rc = dump_read_info(&dump_id, &dump_size, &dump_type);  in process_dump()
397 	if (rc != OPAL_SUCCESS)  in process_dump()
400 	sprintf(name, "0x%x-0x%x", dump_type, dump_id);  in process_dump()
420 	int rc;  in opal_platform_dump_init()  local
433 	rc = sysfs_create_group(&dump_kset->kobj, &initiate_attr_group);  in opal_platform_dump_init()
434 	if (rc) {  in opal_platform_dump_init()
437 		kobject_put(&dump_kset->kobj);  in opal_platform_dump_init()
448 	rc = request_threaded_irq(dump_irq, NULL, process_dump,  in opal_platform_dump_init()
450 				"opal-dump", NULL);  in opal_platform_dump_init()
451 	if (rc) {  in opal_platform_dump_init()
453 		       __func__, rc);  in opal_platform_dump_init()