1 // SPDX-License-Identifier: GPL-2.0-only
7  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
37  * struct minidump_region - Minidump region
53  * struct minidump_subsystem - Subsystem's SMEM Table of content
71  * struct minidump_global_toc - Global Table of Content
97 	list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) {  in qcom_minidump_cleanup()
98 		list_del(&entry->node);  in qcom_minidump_cleanup()
99 		kfree(entry->priv);  in qcom_minidump_cleanup()
115 	if (WARN_ON(!list_empty(&rproc->dump_segments))) {  in qcom_add_minidump_segments()
116 		dev_err(&rproc->dev, "dump segment list already populated\n");  in qcom_add_minidump_segments()
117 		return -EUCLEAN;  in qcom_add_minidump_segments()
120 	seg_cnt = le32_to_cpu(subsystem->region_count);  in qcom_add_minidump_segments()
121 	ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr),  in qcom_add_minidump_segments()
124 		return -EFAULT;  in qcom_add_minidump_segments()
129 			name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);  in qcom_add_minidump_segments()
132 				return -ENOMEM;  in qcom_add_minidump_segments()
157 	if (IS_ERR(toc) || !toc->status) {  in qcom_minidump()
158 		dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n");  in qcom_minidump()
163 	subsystem = &toc->subsystems[minidump_id];  in qcom_minidump()
169 	if (subsystem->regions_baseptr == 0 ||  in qcom_minidump()
170 	    le32_to_cpu(subsystem->status) != 1 ||  in qcom_minidump()
171 	    le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED) {  in qcom_minidump()
175 	if (le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {  in qcom_minidump()
176 		dev_err(&rproc->dev, "Minidump not ready, skipping\n");  in qcom_minidump()
182 	 * re-populating them with minidump segments.  in qcom_minidump()
188 		dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret);  in qcom_minidump()
201 	glink->edge = qcom_glink_smem_register(glink->dev, glink->node);  in glink_subdev_start()
203 	return PTR_ERR_OR_ZERO(glink->edge);  in glink_subdev_start()
210 	qcom_glink_smem_unregister(glink->edge);  in glink_subdev_stop()
211 	glink->edge = NULL;  in glink_subdev_stop()
218 	qcom_glink_ssr_notify(glink->ssr_name);  in glink_subdev_unprepare()
222  * qcom_add_glink_subdev() - try to add a GLINK subdevice to rproc
230 	struct device *dev = &rproc->dev;  in qcom_add_glink_subdev()
232 	glink->node = of_get_child_by_name(dev->parent->of_node, "glink-edge");  in qcom_add_glink_subdev()
233 	if (!glink->node)  in qcom_add_glink_subdev()
236 	glink->ssr_name = kstrdup_const(ssr_name, GFP_KERNEL);  in qcom_add_glink_subdev()
237 	if (!glink->ssr_name)  in qcom_add_glink_subdev()
240 	glink->dev = dev;  in qcom_add_glink_subdev()
241 	glink->subdev.start = glink_subdev_start;  in qcom_add_glink_subdev()
242 	glink->subdev.stop = glink_subdev_stop;  in qcom_add_glink_subdev()
243 	glink->subdev.unprepare = glink_subdev_unprepare;  in qcom_add_glink_subdev()
245 	rproc_add_subdev(rproc, &glink->subdev);  in qcom_add_glink_subdev()
250  * qcom_remove_glink_subdev() - remove a GLINK subdevice from rproc
256 	if (!glink->node)  in qcom_remove_glink_subdev()
259 	rproc_remove_subdev(rproc, &glink->subdev);  in qcom_remove_glink_subdev()
260 	kfree_const(glink->ssr_name);  in qcom_remove_glink_subdev()
261 	of_node_put(glink->node);  in qcom_remove_glink_subdev()
266  * qcom_register_dump_segments() - register segments for coredump
283 	ehdr = (struct elf32_hdr *)fw->data;  in qcom_register_dump_segments()
286 	for (i = 0; i < ehdr->e_phnum; i++) {  in qcom_register_dump_segments()
289 		if (phdr->p_type != PT_LOAD)  in qcom_register_dump_segments()
292 		if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)  in qcom_register_dump_segments()
295 		if (!phdr->p_memsz)  in qcom_register_dump_segments()
298 		ret = rproc_coredump_add_segment(rproc, phdr->p_paddr,  in qcom_register_dump_segments()
299 						 phdr->p_memsz);  in qcom_register_dump_segments()
310 	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);  in smd_subdev_start()  local
312 	smd->edge = qcom_smd_register_edge(smd->dev, smd->node);  in smd_subdev_start()
314 	return PTR_ERR_OR_ZERO(smd->edge);  in smd_subdev_start()
319 	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);  in smd_subdev_stop()  local
321 	qcom_smd_unregister_edge(smd->edge);  in smd_subdev_stop()
322 	smd->edge = NULL;  in smd_subdev_stop()
326  * qcom_add_smd_subdev() - try to add a SMD subdevice to rproc
328  * @smd:	reference to a Qualcomm subdev context
330 void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)  in qcom_add_smd_subdev()  argument
332 	struct device *dev = &rproc->dev;  in qcom_add_smd_subdev()
334 	smd->node = of_get_child_by_name(dev->parent->of_node, "smd-edge");  in qcom_add_smd_subdev()
335 	if (!smd->node)  in qcom_add_smd_subdev()
338 	smd->dev = dev;  in qcom_add_smd_subdev()
339 	smd->subdev.start = smd_subdev_start;  in qcom_add_smd_subdev()
340 	smd->subdev.stop = smd_subdev_stop;  in qcom_add_smd_subdev()
342 	rproc_add_subdev(rproc, &smd->subdev);  in qcom_add_smd_subdev()
347  * qcom_remove_smd_subdev() - remove the smd subdevice from rproc
349  * @smd:	the SMD subdevice to remove
351 void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)  in qcom_remove_smd_subdev()  argument
353 	if (!smd->node)  in qcom_remove_smd_subdev()
356 	rproc_remove_subdev(rproc, &smd->subdev);  in qcom_remove_smd_subdev()
357 	of_node_put(smd->node);  in qcom_remove_smd_subdev()
368 		if (!strcmp(info->name, name))  in qcom_ssr_get_subsys()
373 		info = ERR_PTR(-ENOMEM);  in qcom_ssr_get_subsys()
376 	info->name = kstrdup_const(name, GFP_KERNEL);  in qcom_ssr_get_subsys()
377 	srcu_init_notifier_head(&info->notifier_list);  in qcom_ssr_get_subsys()
380 	list_add_tail(&info->list, &qcom_ssr_subsystem_list);  in qcom_ssr_get_subsys()
388  * qcom_register_ssr_notifier() - register SSR notification handler
407 	srcu_notifier_chain_register(&info->notifier_list, nb);  in qcom_register_ssr_notifier()
409 	return &info->notifier_list;  in qcom_register_ssr_notifier()
414  * qcom_unregister_ssr_notifier() - unregister SSR notification handler
433 		.name = ssr->info->name,  in ssr_notify_prepare()
437 	srcu_notifier_call_chain(&ssr->info->notifier_list,  in ssr_notify_prepare()
446 		.name = ssr->info->name,  in ssr_notify_start()
450 	srcu_notifier_call_chain(&ssr->info->notifier_list,  in ssr_notify_start()
459 		.name = ssr->info->name,  in ssr_notify_stop()
463 	srcu_notifier_call_chain(&ssr->info->notifier_list,  in ssr_notify_stop()
471 		.name = ssr->info->name,  in ssr_notify_unprepare()
475 	srcu_notifier_call_chain(&ssr->info->notifier_list,  in ssr_notify_unprepare()
480  * qcom_add_ssr_subdev() - register subdevice as restart notification source
496 		dev_err(&rproc->dev, "Failed to add ssr subdevice\n");  in qcom_add_ssr_subdev()
500 	ssr->info = info;  in qcom_add_ssr_subdev()
501 	ssr->subdev.prepare = ssr_notify_prepare;  in qcom_add_ssr_subdev()
502 	ssr->subdev.start = ssr_notify_start;  in qcom_add_ssr_subdev()
503 	ssr->subdev.stop = ssr_notify_stop;  in qcom_add_ssr_subdev()
504 	ssr->subdev.unprepare = ssr_notify_unprepare;  in qcom_add_ssr_subdev()
506 	rproc_add_subdev(rproc, &ssr->subdev);  in qcom_add_ssr_subdev()
511  * qcom_remove_ssr_subdev() - remove subdevice as restart notification source
517 	rproc_remove_subdev(rproc, &ssr->subdev);  in qcom_remove_ssr_subdev()
518 	ssr->info = NULL;  in qcom_remove_ssr_subdev()