[linux-block.git] / drivers / remoteproc / qcom_common.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Qualcomm Peripheral Image Loader helpers
 *
 * Copyright (C) 2016 Linaro Ltd
 * Copyright (C) 2015 Sony Mobile Communications Inc
 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
 */

#include <linux/firmware.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/remoteproc.h>
#include <linux/remoteproc/qcom_rproc.h>
#include <linux/rpmsg/qcom_glink.h>
#include <linux/rpmsg/qcom_smd.h>
#include <linux/slab.h>
#include <linux/soc/qcom/mdt_loader.h>
#include <linux/soc/qcom/smem.h>

#include "remoteproc_internal.h"
#include "qcom_common.h"

#define to_glink_subdev(d) container_of(d, struct qcom_rproc_glink, subdev)
#define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
#define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)

#define MAX_NUM_OF_SS           10
#define MAX_REGION_NAME_LENGTH  16
#define SBL_MINIDUMP_SMEM_ID	602
#define MINIDUMP_REGION_VALID		('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
#define MINIDUMP_SS_ENCR_DONE		('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
#define MINIDUMP_SS_ENABLED		('E' << 24 | 'N' << 16 | 'B' << 8 | 'L' << 0)

/**
 * struct minidump_region - Minidump region
 * @name		: Name of the region to be dumped
 * @seq_num:		: Use to differentiate regions with same name.
 * @valid		: This entry to be dumped (if set to 1)
 * @address		: Physical address of region to be dumped
 * @size		: Size of the region
 */
struct minidump_region {
	char	name[MAX_REGION_NAME_LENGTH];
	__le32	seq_num;
	__le32	valid;
	__le64	address;
	__le64	size;
};

/**
 * struct minidump_subsystem - Subsystem's SMEM Table of content
 * @status : Subsystem toc init status
 * @enabled : if set to 1, this region would be copied during coredump
 * @encryption_status: Encryption status for this subsystem
 * @encryption_required : Decides to encrypt the subsystem regions or not
 * @region_count : Number of regions added in this subsystem toc
 * @regions_baseptr : regions base pointer of the subsystem
 */
struct minidump_subsystem {
	__le32	status;
	__le32	enabled;
	__le32	encryption_status;
	__le32	encryption_required;
	__le32	region_count;
	__le64	regions_baseptr;
};

/**
 * struct minidump_global_toc - Global Table of Content
 * @status : Global Minidump init status
 * @md_revision : Minidump revision
 * @enabled : Minidump enable status
 * @subsystems : Array of subsystems toc
 */
struct minidump_global_toc {
	__le32				status;
	__le32				md_revision;
	__le32				enabled;
	struct minidump_subsystem	subsystems[MAX_NUM_OF_SS];
};

struct qcom_ssr_subsystem {
	const char *name;
	struct srcu_notifier_head notifier_list;
	struct list_head list;
};

static LIST_HEAD(qcom_ssr_subsystem_list);
static DEFINE_MUTEX(qcom_ssr_subsys_lock);

static void qcom_minidump_cleanup(struct rproc *rproc)
{
	struct rproc_dump_segment *entry, *tmp;

	list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) {
		list_del(&entry->node);
		kfree(entry->priv);
		kfree(entry);
	}
}

static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem,
			void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment,
				void *dest, size_t offset, size_t size))
{
	struct minidump_region __iomem *ptr;
	struct minidump_region region;
	int seg_cnt, i;
	dma_addr_t da;
	size_t size;
	char *name;

	if (WARN_ON(!list_empty(&rproc->dump_segments))) {
		dev_err(&rproc->dev, "dump segment list already populated\n");
		return -EUCLEAN;
	}

	seg_cnt = le32_to_cpu(subsystem->region_count);
	ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr),
		      seg_cnt * sizeof(struct minidump_region));
	if (!ptr)
		return -EFAULT;

	for (i = 0; i < seg_cnt; i++) {
		memcpy_fromio(&region, ptr + i, sizeof(region));
		if (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
			name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
			if (!name) {
				iounmap(ptr);
				return -ENOMEM;
			}
			da = le64_to_cpu(region.address);
			size = le64_to_cpu(region.size);
			rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
		}
	}

	iounmap(ptr);
	return 0;
}

void qcom_minidump(struct rproc *rproc, unsigned int minidump_id,
		void (*rproc_dumpfn_t)(struct rproc *rproc,
		struct rproc_dump_segment *segment, void *dest, size_t offset,
		size_t size))
{
	int ret;
	struct minidump_subsystem *subsystem;
	struct minidump_global_toc *toc;

	/* Get Global minidump ToC*/
	toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL);

	/* check if global table pointer exists and init is set */
	if (IS_ERR(toc) || !toc->status) {
		dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n");
		return;
	}

	/* Get subsystem table of contents using the minidump id */
	subsystem = &toc->subsystems[minidump_id];

	/**
	 * Collect minidump if SS ToC is valid and segment table
	 * is initialized in memory and encryption status is set.
	 */
	if (subsystem->regions_baseptr == 0 ||
	    le32_to_cpu(subsystem->status) != 1 ||
	    le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED) {
		return rproc_coredump(rproc);
	}

	if (le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
		dev_err(&rproc->dev, "Minidump not ready, skipping\n");
		return;
	}

	/**
	 * Clear out the dump segments populated by parse_fw before
	 * re-populating them with minidump segments.
	 */
	rproc_coredump_cleanup(rproc);

	ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
	if (ret) {
		dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret);
		goto clean_minidump;
	}
	rproc_coredump_using_sections(rproc);
clean_minidump:
	qcom_minidump_cleanup(rproc);
}
EXPORT_SYMBOL_GPL(qcom_minidump);

static int glink_subdev_start(struct rproc_subdev *subdev)
{
	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);

	glink->edge = qcom_glink_smem_register(glink->dev, glink->node);

	return PTR_ERR_OR_ZERO(glink->edge);
}

static void glink_subdev_stop(struct rproc_subdev *subdev, bool crashed)
{
	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);

	qcom_glink_smem_unregister(glink->edge);
	glink->edge = NULL;
}

static void glink_subdev_unprepare(struct rproc_subdev *subdev)
{
	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);

	qcom_glink_ssr_notify(glink->ssr_name);
}

/**
 * qcom_add_glink_subdev() - try to add a GLINK subdevice to rproc
 * @rproc:	rproc handle to parent the subdevice
 * @glink:	reference to a GLINK subdev context
 * @ssr_name:	identifier of the associated remoteproc for ssr notifications
 */
void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink,
			   const char *ssr_name)
{
	struct device *dev = &rproc->dev;

	glink->node = of_get_child_by_name(dev->parent->of_node, "glink-edge");
	if (!glink->node)
		return;

	glink->ssr_name = kstrdup_const(ssr_name, GFP_KERNEL);
	if (!glink->ssr_name)
		return;

	glink->dev = dev;
	glink->subdev.start = glink_subdev_start;
	glink->subdev.stop = glink_subdev_stop;
	glink->subdev.unprepare = glink_subdev_unprepare;

	rproc_add_subdev(rproc, &glink->subdev);
}
EXPORT_SYMBOL_GPL(qcom_add_glink_subdev);

/**
 * qcom_remove_glink_subdev() - remove a GLINK subdevice from rproc
 * @rproc:	rproc handle
 * @glink:	reference to a GLINK subdev context
 */
void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
{
	if (!glink->node)
		return;

	rproc_remove_subdev(rproc, &glink->subdev);
	kfree_const(glink->ssr_name);
	of_node_put(glink->node);
}
EXPORT_SYMBOL_GPL(qcom_remove_glink_subdev);

/**
 * qcom_register_dump_segments() - register segments for coredump
 * @rproc:	remoteproc handle
 * @fw:		firmware header
 *
 * Register all segments of the ELF in the remoteproc coredump segment list
 *
 * Return: 0 on success, negative errno on failure.
 */
int qcom_register_dump_segments(struct rproc *rproc,
				const struct firmware *fw)
{
	const struct elf32_phdr *phdrs;
	const struct elf32_phdr *phdr;
	const struct elf32_hdr *ehdr;
	int ret;
	int i;

	ehdr = (struct elf32_hdr *)fw->data;
	phdrs = (struct elf32_phdr *)(ehdr + 1);

	for (i = 0; i < ehdr->e_phnum; i++) {
		phdr = &phdrs[i];

		if (phdr->p_type != PT_LOAD)
			continue;

		if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
			continue;

		if (!phdr->p_memsz)
			continue;

		ret = rproc_coredump_add_segment(rproc, phdr->p_paddr,
						 phdr->p_memsz);
		if (ret)
			return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(qcom_register_dump_segments);

static int smd_subdev_start(struct rproc_subdev *subdev)
{
	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);

	smd->edge = qcom_smd_register_edge(smd->dev, smd->node);

	return PTR_ERR_OR_ZERO(smd->edge);
}

static void smd_subdev_stop(struct rproc_subdev *subdev, bool crashed)
{
	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);

	qcom_smd_unregister_edge(smd->edge);
	smd->edge = NULL;
}

/**
 * qcom_add_smd_subdev() - try to add a SMD subdevice to rproc
 * @rproc:	rproc handle to parent the subdevice
 * @smd:	reference to a Qualcomm subdev context
 */
void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
{
	struct device *dev = &rproc->dev;

	smd->node = of_get_child_by_name(dev->parent->of_node, "smd-edge");
	if (!smd->node)
		return;

	smd->dev = dev;
	smd->subdev.start = smd_subdev_start;
	smd->subdev.stop = smd_subdev_stop;

	rproc_add_subdev(rproc, &smd->subdev);
}
EXPORT_SYMBOL_GPL(qcom_add_smd_subdev);

/**
 * qcom_remove_smd_subdev() - remove the smd subdevice from rproc
 * @rproc:	rproc handle
 * @smd:	the SMD subdevice to remove
 */
void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
{
	if (!smd->node)
		return;

	rproc_remove_subdev(rproc, &smd->subdev);
	of_node_put(smd->node);
}
EXPORT_SYMBOL_GPL(qcom_remove_smd_subdev);

static struct qcom_ssr_subsystem *qcom_ssr_get_subsys(const char *name)
{
	struct qcom_ssr_subsystem *info;

	mutex_lock(&qcom_ssr_subsys_lock);
	/* Match in the global qcom_ssr_subsystem_list with name */
	list_for_each_entry(info, &qcom_ssr_subsystem_list, list)
		if (!strcmp(info->name, name))
			goto out;

	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info) {
		info = ERR_PTR(-ENOMEM);
		goto out;
	}
	info->name = kstrdup_const(name, GFP_KERNEL);
	srcu_init_notifier_head(&info->notifier_list);

	/* Add to global notification list */
	list_add_tail(&info->list, &qcom_ssr_subsystem_list);

out:
	mutex_unlock(&qcom_ssr_subsys_lock);
	return info;
}

/**
 * qcom_register_ssr_notifier() - register SSR notification handler
 * @name:	Subsystem's SSR name
 * @nb:		notifier_block to be invoked upon subsystem's state change
 *
 * This registers the @nb notifier block as part the notifier chain for a
 * remoteproc associated with @name. The notifier block's callback
 * will be invoked when the remote processor's SSR events occur
 * (pre/post startup and pre/post shutdown).
 *
 * Return: a subsystem cookie on success, ERR_PTR on failure.
 */
void *qcom_register_ssr_notifier(const char *name, struct notifier_block *nb)
{
	struct qcom_ssr_subsystem *info;

	info = qcom_ssr_get_subsys(name);
	if (IS_ERR(info))
		return info;

	srcu_notifier_chain_register(&info->notifier_list, nb);

	return &info->notifier_list;
}
EXPORT_SYMBOL_GPL(qcom_register_ssr_notifier);

/**
 * qcom_unregister_ssr_notifier() - unregister SSR notification handler
 * @notify:	subsystem cookie returned from qcom_register_ssr_notifier
 * @nb:		notifier_block to unregister
 *
 * This function will unregister the notifier from the particular notifier
 * chain.
 *
 * Return: 0 on success, %ENOENT otherwise.
 */
int qcom_unregister_ssr_notifier(void *notify, struct notifier_block *nb)
{
	return srcu_notifier_chain_unregister(notify, nb);
}
EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier);

static int ssr_notify_prepare(struct rproc_subdev *subdev)
{
	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	struct qcom_ssr_notify_data data = {
		.name = ssr->info->name,
		.crashed = false,
	};

	srcu_notifier_call_chain(&ssr->info->notifier_list,
				 QCOM_SSR_BEFORE_POWERUP, &data);
	return 0;
}

static int ssr_notify_start(struct rproc_subdev *subdev)
{
	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	struct qcom_ssr_notify_data data = {
		.name = ssr->info->name,
		.crashed = false,
	};

	srcu_notifier_call_chain(&ssr->info->notifier_list,
				 QCOM_SSR_AFTER_POWERUP, &data);
	return 0;
}

static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed)
{
	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	struct qcom_ssr_notify_data data = {
		.name = ssr->info->name,
		.crashed = crashed,
	};

	srcu_notifier_call_chain(&ssr->info->notifier_list,
				 QCOM_SSR_BEFORE_SHUTDOWN, &data);
}

static void ssr_notify_unprepare(struct rproc_subdev *subdev)
{
	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	struct qcom_ssr_notify_data data = {
		.name = ssr->info->name,
		.crashed = false,
	};

	srcu_notifier_call_chain(&ssr->info->notifier_list,
				 QCOM_SSR_AFTER_SHUTDOWN, &data);
}

/**
 * qcom_add_ssr_subdev() - register subdevice as restart notification source
 * @rproc:	rproc handle
 * @ssr:	SSR subdevice handle
 * @ssr_name:	identifier to use for notifications originating from @rproc
 *
 * As the @ssr is registered with the @rproc SSR events will be sent to all
 * registered listeners for the remoteproc when it's SSR events occur
 * (pre/post startup and pre/post shutdown).
 */
void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
			 const char *ssr_name)
{
	struct qcom_ssr_subsystem *info;

	info = qcom_ssr_get_subsys(ssr_name);
	if (IS_ERR(info)) {
		dev_err(&rproc->dev, "Failed to add ssr subdevice\n");
		return;
	}

	ssr->info = info;
	ssr->subdev.prepare = ssr_notify_prepare;
	ssr->subdev.start = ssr_notify_start;
	ssr->subdev.stop = ssr_notify_stop;
	ssr->subdev.unprepare = ssr_notify_unprepare;

	rproc_add_subdev(rproc, &ssr->subdev);
}
EXPORT_SYMBOL_GPL(qcom_add_ssr_subdev);

/**
 * qcom_remove_ssr_subdev() - remove subdevice as restart notification source
 * @rproc:	rproc handle
 * @ssr:	SSR subdevice handle
 */
void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr)
{
	rproc_remove_subdev(rproc, &ssr->subdev);
	ssr->info = NULL;
}
EXPORT_SYMBOL_GPL(qcom_remove_ssr_subdev);

MODULE_DESCRIPTION("Qualcomm Remoteproc helper driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1802d0be	1	// SPDX-License-Identifier: GPL-2.0-only
bde440ee BA	2	/*
	3	* Qualcomm Peripheral Image Loader helpers
	4	*
	5	* Copyright (C) 2016 Linaro Ltd
	6	* Copyright (C) 2015 Sony Mobile Communications Inc
	7	* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
bde440ee BA	8	*/
	9
	10	#include <linux/firmware.h>
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
1e140df0	13	#include <linux/notifier.h>
bde440ee	14	#include <linux/remoteproc.h>
5abfe5cf	15	#include <linux/remoteproc/qcom_rproc.h>
eea07023	16	#include <linux/rpmsg/qcom_glink.h>
b90fcfcb	17	#include <linux/rpmsg/qcom_smd.h>
0cf17702	18	#include <linux/slab.h>
dcb57ed4	19	#include <linux/soc/qcom/mdt_loader.h>
8ed8485c	20	#include <linux/soc/qcom/smem.h>
bde440ee BA	21
	22	#include "remoteproc_internal.h"
	23	#include "qcom_common.h"
	24
eea07023	25	#define to_glink_subdev(d) container_of(d, struct qcom_rproc_glink, subdev)
b90fcfcb	26	#define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
1e140df0 BA	27	#define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)
1e140df0 BA	28
8ed8485c SG	29	#define MAX_NUM_OF_SS 10
	30	#define MAX_REGION_NAME_LENGTH 16
	31	#define SBL_MINIDUMP_SMEM_ID 602
318da137 MO	32	#define MINIDUMP_REGION_VALID ('V' << 24 \| 'A' << 16 \| 'L' << 8 \| 'I' << 0)
	33	#define MINIDUMP_SS_ENCR_DONE ('D' << 24 \| 'O' << 16 \| 'N' << 8 \| 'E' << 0)
	34	#define MINIDUMP_SS_ENABLED ('E' << 24 \| 'N' << 16 \| 'B' << 8 \| 'L' << 0)
8ed8485c SG	35
	36	/**
	37	* struct minidump_region - Minidump region
	38	* @name : Name of the region to be dumped
	39	* @seq_num: : Use to differentiate regions with same name.
	40	* @valid : This entry to be dumped (if set to 1)
	41	* @address : Physical address of region to be dumped
	42	* @size : Size of the region
	43	*/
	44	struct minidump_region {
	45	char name[MAX_REGION_NAME_LENGTH];
	46	__le32 seq_num;
	47	__le32 valid;
	48	__le64 address;
	49	__le64 size;
	50	};
	51
	52	/**
d0c11db5	53	* struct minidump_subsystem - Subsystem's SMEM Table of content
8ed8485c SG	54	* @status : Subsystem toc init status
	55	* @enabled : if set to 1, this region would be copied during coredump
	56	* @encryption_status: Encryption status for this subsystem
	57	* @encryption_required : Decides to encrypt the subsystem regions or not
	58	* @region_count : Number of regions added in this subsystem toc
	59	* @regions_baseptr : regions base pointer of the subsystem
	60	*/
	61	struct minidump_subsystem {
	62	__le32 status;
	63	__le32 enabled;
	64	__le32 encryption_status;
	65	__le32 encryption_required;
	66	__le32 region_count;
	67	__le64 regions_baseptr;
	68	};
	69
	70	/**
d0c11db5	71	* struct minidump_global_toc - Global Table of Content
8ed8485c SG	72	* @status : Global Minidump init status
	73	* @md_revision : Minidump revision
	74	* @enabled : Minidump enable status
	75	* @subsystems : Array of subsystems toc
	76	*/
	77	struct minidump_global_toc {
	78	__le32 status;
	79	__le32 md_revision;
	80	__le32 enabled;
	81	struct minidump_subsystem subsystems[MAX_NUM_OF_SS];
	82	};
	83
5abfe5cf RB	84	struct qcom_ssr_subsystem {
	85	const char *name;
	86	struct srcu_notifier_head notifier_list;
	87	struct list_head list;
	88	};
	89
	90	static LIST_HEAD(qcom_ssr_subsystem_list);
	91	static DEFINE_MUTEX(qcom_ssr_subsys_lock);
b90fcfcb	92
8ed8485c SG	93	static void qcom_minidump_cleanup(struct rproc *rproc)
	94	{
	95	struct rproc_dump_segment entry, tmp;
	96
	97	list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) {
	98	list_del(&entry->node);
	99	kfree(entry->priv);
	100	kfree(entry);
	101	}
	102	}
	103
a376c10d YL	104	static int qcom_add_minidump_segments(struct rproc rproc, struct minidump_subsystem subsystem,
	105	void (rproc_dumpfn_t)(struct rproc rproc, struct rproc_dump_segment *segment,
	106	void *dest, size_t offset, size_t size))
8ed8485c SG	107	{
	108	struct minidump_region __iomem *ptr;
	109	struct minidump_region region;
	110	int seg_cnt, i;
	111	dma_addr_t da;
	112	size_t size;
	113	char *name;
	114
	115	if (WARN_ON(!list_empty(&rproc->dump_segments))) {
	116	dev_err(&rproc->dev, "dump segment list already populated\n");
	117	return -EUCLEAN;
	118	}
	119
	120	seg_cnt = le32_to_cpu(subsystem->region_count);
	121	ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr),
	122	seg_cnt * sizeof(struct minidump_region));
	123	if (!ptr)
	124	return -EFAULT;
	125
	126	for (i = 0; i < seg_cnt; i++) {
	127	memcpy_fromio(&region, ptr + i, sizeof(region));
318da137	128	if (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
9d5b9ad9	129	name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
8ed8485c SG	130	if (!name) {
	131	iounmap(ptr);
	132	return -ENOMEM;
	133	}
	134	da = le64_to_cpu(region.address);
2554dd0a	135	size = le64_to_cpu(region.size);
a376c10d	136	rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
8ed8485c SG	137	}
	138	}
	139
	140	iounmap(ptr);
	141	return 0;
	142	}
	143
a376c10d YL	144	void qcom_minidump(struct rproc *rproc, unsigned int minidump_id,
	145	void (rproc_dumpfn_t)(struct rproc rproc,
	146	struct rproc_dump_segment segment, void dest, size_t offset,
	147	size_t size))
8ed8485c SG	148	{
	149	int ret;
	150	struct minidump_subsystem *subsystem;
	151	struct minidump_global_toc *toc;
	152
	153	/* Get Global minidump ToC*/
	154	toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL);
	155
	156	/* check if global table pointer exists and init is set */
	157	if (IS_ERR(toc) \|\| !toc->status) {
	158	dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n");
	159	return;
	160	}
	161
	162	/* Get subsystem table of contents using the minidump id */
	163	subsystem = &toc->subsystems[minidump_id];
	164
	165	/**
	166	* Collect minidump if SS ToC is valid and segment table
	167	* is initialized in memory and encryption status is set.
	168	*/
	169	if (subsystem->regions_baseptr == 0 \|\|
	170	le32_to_cpu(subsystem->status) != 1 \|\|
318da137	171	le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED) {
5c43ed8a SG	172	return rproc_coredump(rproc);
	173	}
	174
318da137	175	if (le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
8ed8485c SG	176	dev_err(&rproc->dev, "Minidump not ready, skipping\n");
	177	return;
	178	}
	179
5c43ed8a SG	180	/**
	181	* Clear out the dump segments populated by parse_fw before
	182	* re-populating them with minidump segments.
	183	*/
	184	rproc_coredump_cleanup(rproc);
	185
a376c10d	186	ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
8ed8485c SG	187	if (ret) {
	188	dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret);
	189	goto clean_minidump;
	190	}
	191	rproc_coredump_using_sections(rproc);
	192	clean_minidump:
	193	qcom_minidump_cleanup(rproc);
	194	}
	195	EXPORT_SYMBOL_GPL(qcom_minidump);
	196
6f8b0373	197	static int glink_subdev_start(struct rproc_subdev *subdev)
eea07023 BA	198	{
	199	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
	200
	201	glink->edge = qcom_glink_smem_register(glink->dev, glink->node);
	202
a1fcc455	203	return PTR_ERR_OR_ZERO(glink->edge);
eea07023 BA	204	}
eea07023 BA	205
6f8b0373	206	static void glink_subdev_stop(struct rproc_subdev *subdev, bool crashed)
eea07023 BA	207	{
	208	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
	209
	210	qcom_glink_smem_unregister(glink->edge);
	211	glink->edge = NULL;
	212	}
	213
5d1f2e3c BA	214	static void glink_subdev_unprepare(struct rproc_subdev *subdev)
	215	{
	216	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
	217
	218	qcom_glink_ssr_notify(glink->ssr_name);
	219	}
	220
eea07023 BA	221	/**
	222	* qcom_add_glink_subdev() - try to add a GLINK subdevice to rproc
	223	* @rproc: rproc handle to parent the subdevice
	224	* @glink: reference to a GLINK subdev context
cd9fc8f1	225	* @ssr_name: identifier of the associated remoteproc for ssr notifications
eea07023	226	*/
cd9fc8f1 BA	227	void qcom_add_glink_subdev(struct rproc rproc, struct qcom_rproc_glink glink,
cd9fc8f1 BA	228	const char *ssr_name)
eea07023 BA	229	{
	230	struct device *dev = &rproc->dev;
	231
	232	glink->node = of_get_child_by_name(dev->parent->of_node, "glink-edge");
	233	if (!glink->node)
	234	return;
	235
cd9fc8f1 BA	236	glink->ssr_name = kstrdup_const(ssr_name, GFP_KERNEL);
	237	if (!glink->ssr_name)
	238	return;
	239
eea07023	240	glink->dev = dev;
6f8b0373 AE	241	glink->subdev.start = glink_subdev_start;
6f8b0373 AE	242	glink->subdev.stop = glink_subdev_stop;
5d1f2e3c	243	glink->subdev.unprepare = glink_subdev_unprepare;
4902676f BA	244
4902676f BA	245	rproc_add_subdev(rproc, &glink->subdev);
eea07023 BA	246	}
	247	EXPORT_SYMBOL_GPL(qcom_add_glink_subdev);
	248
	249	/**
	250	* qcom_remove_glink_subdev() - remove a GLINK subdevice from rproc
	251	* @rproc: rproc handle
	252	* @glink: reference to a GLINK subdev context
	253	*/
	254	void qcom_remove_glink_subdev(struct rproc rproc, struct qcom_rproc_glink glink)
	255	{
730b2ad8 SS	256	if (!glink->node)
	257	return;
	258
eea07023	259	rproc_remove_subdev(rproc, &glink->subdev);
cd9fc8f1	260	kfree_const(glink->ssr_name);
eea07023 BA	261	of_node_put(glink->node);
	262	}
	263	EXPORT_SYMBOL_GPL(qcom_remove_glink_subdev);
	264
dcb57ed4 SJ	265	/**
	266	* qcom_register_dump_segments() - register segments for coredump
	267	* @rproc: remoteproc handle
	268	* @fw: firmware header
	269	*
	270	* Register all segments of the ELF in the remoteproc coredump segment list
	271	*
	272	* Return: 0 on success, negative errno on failure.
	273	*/
	274	int qcom_register_dump_segments(struct rproc *rproc,
	275	const struct firmware *fw)
	276	{
	277	const struct elf32_phdr *phdrs;
	278	const struct elf32_phdr *phdr;
	279	const struct elf32_hdr *ehdr;
	280	int ret;
	281	int i;
	282
	283	ehdr = (struct elf32_hdr *)fw->data;
	284	phdrs = (struct elf32_phdr *)(ehdr + 1);
	285
	286	for (i = 0; i < ehdr->e_phnum; i++) {
	287	phdr = &phdrs[i];
	288
	289	if (phdr->p_type != PT_LOAD)
	290	continue;
	291
	292	if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
	293	continue;
	294
	295	if (!phdr->p_memsz)
	296	continue;
	297
	298	ret = rproc_coredump_add_segment(rproc, phdr->p_paddr,
	299	phdr->p_memsz);
	300	if (ret)
	301	return ret;
	302	}
	303
	304	return 0;
	305	}
	306	EXPORT_SYMBOL_GPL(qcom_register_dump_segments);
	307
6f8b0373	308	static int smd_subdev_start(struct rproc_subdev *subdev)
b90fcfcb BA	309	{
	310	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
	311
	312	smd->edge = qcom_smd_register_edge(smd->dev, smd->node);
	313
c76929b3	314	return PTR_ERR_OR_ZERO(smd->edge);
b90fcfcb BA	315	}
b90fcfcb BA	316
6f8b0373	317	static void smd_subdev_stop(struct rproc_subdev *subdev, bool crashed)
b90fcfcb BA	318	{
	319	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
	320
	321	qcom_smd_unregister_edge(smd->edge);
	322	smd->edge = NULL;
	323	}
	324
	325	/**
	326	* qcom_add_smd_subdev() - try to add a SMD subdevice to rproc
	327	* @rproc: rproc handle to parent the subdevice
	328	* @smd: reference to a Qualcomm subdev context
	329	*/
	330	void qcom_add_smd_subdev(struct rproc rproc, struct qcom_rproc_subdev smd)
	331	{
	332	struct device *dev = &rproc->dev;
	333
	334	smd->node = of_get_child_by_name(dev->parent->of_node, "smd-edge");
	335	if (!smd->node)
	336	return;
	337
	338	smd->dev = dev;
6f8b0373 AE	339	smd->subdev.start = smd_subdev_start;
6f8b0373 AE	340	smd->subdev.stop = smd_subdev_stop;
4902676f BA	341
4902676f BA	342	rproc_add_subdev(rproc, &smd->subdev);
b90fcfcb BA	343	}
	344	EXPORT_SYMBOL_GPL(qcom_add_smd_subdev);
	345
	346	/**
	347	* qcom_remove_smd_subdev() - remove the smd subdevice from rproc
	348	* @rproc: rproc handle
	349	* @smd: the SMD subdevice to remove
	350	*/
	351	void qcom_remove_smd_subdev(struct rproc rproc, struct qcom_rproc_subdev smd)
	352	{
730b2ad8 SS	353	if (!smd->node)
	354	return;
	355
b90fcfcb BA	356	rproc_remove_subdev(rproc, &smd->subdev);
	357	of_node_put(smd->node);
	358	}
	359	EXPORT_SYMBOL_GPL(qcom_remove_smd_subdev);
	360
5abfe5cf RB	361	static struct qcom_ssr_subsystem qcom_ssr_get_subsys(const char name)
	362	{
	363	struct qcom_ssr_subsystem *info;
	364
	365	mutex_lock(&qcom_ssr_subsys_lock);
	366	/* Match in the global qcom_ssr_subsystem_list with name */
	367	list_for_each_entry(info, &qcom_ssr_subsystem_list, list)
	368	if (!strcmp(info->name, name))
	369	goto out;
	370
	371	info = kzalloc(sizeof(*info), GFP_KERNEL);
	372	if (!info) {
	373	info = ERR_PTR(-ENOMEM);
	374	goto out;
	375	}
	376	info->name = kstrdup_const(name, GFP_KERNEL);
	377	srcu_init_notifier_head(&info->notifier_list);
	378
	379	/* Add to global notification list */
	380	list_add_tail(&info->list, &qcom_ssr_subsystem_list);
	381
	382	out:
	383	mutex_unlock(&qcom_ssr_subsys_lock);
	384	return info;
	385	}
	386
1e140df0 BA	387	/**
1e140df0 BA	388	* qcom_register_ssr_notifier() - register SSR notification handler
5abfe5cf RB	389	* @name: Subsystem's SSR name
5abfe5cf RB	390	* @nb: notifier_block to be invoked upon subsystem's state change
1e140df0	391	*
5abfe5cf RB	392	* This registers the @nb notifier block as part the notifier chain for a
	393	* remoteproc associated with @name. The notifier block's callback
	394	* will be invoked when the remote processor's SSR events occur
	395	* (pre/post startup and pre/post shutdown).
1e140df0	396	*
5abfe5cf	397	* Return: a subsystem cookie on success, ERR_PTR on failure.
1e140df0	398	*/
5abfe5cf	399	void qcom_register_ssr_notifier(const char name, struct notifier_block *nb)
1e140df0	400	{
5abfe5cf RB	401	struct qcom_ssr_subsystem *info;
	402
	403	info = qcom_ssr_get_subsys(name);
	404	if (IS_ERR(info))
	405	return info;
	406
	407	srcu_notifier_chain_register(&info->notifier_list, nb);
	408
	409	return &info->notifier_list;
1e140df0 BA	410	}
	411	EXPORT_SYMBOL_GPL(qcom_register_ssr_notifier);
	412
	413	/**
	414	* qcom_unregister_ssr_notifier() - unregister SSR notification handler
5abfe5cf	415	* @notify: subsystem cookie returned from qcom_register_ssr_notifier
1e140df0	416	* @nb: notifier_block to unregister
5abfe5cf RB	417	*
	418	* This function will unregister the notifier from the particular notifier
	419	* chain.
	420	*
	421	* Return: 0 on success, %ENOENT otherwise.
1e140df0	422	*/
5abfe5cf	423	int qcom_unregister_ssr_notifier(void notify, struct notifier_block nb)
1e140df0	424	{
5abfe5cf	425	return srcu_notifier_chain_unregister(notify, nb);
1e140df0 BA	426	}
	427	EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier);
	428
62495d77 RB	429	static int ssr_notify_prepare(struct rproc_subdev *subdev)
	430	{
	431	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	432	struct qcom_ssr_notify_data data = {
	433	.name = ssr->info->name,
	434	.crashed = false,
	435	};
	436
	437	srcu_notifier_call_chain(&ssr->info->notifier_list,
	438	QCOM_SSR_BEFORE_POWERUP, &data);
	439	return 0;
	440	}
	441
	442	static int ssr_notify_start(struct rproc_subdev *subdev)
	443	{
	444	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	445	struct qcom_ssr_notify_data data = {
	446	.name = ssr->info->name,
	447	.crashed = false,
	448	};
	449
	450	srcu_notifier_call_chain(&ssr->info->notifier_list,
	451	QCOM_SSR_AFTER_POWERUP, &data);
	452	return 0;
	453	}
	454
	455	static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed)
	456	{
	457	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
	458	struct qcom_ssr_notify_data data = {
	459	.name = ssr->info->name,
	460	.crashed = crashed,
	461	};
	462
	463	srcu_notifier_call_chain(&ssr->info->notifier_list,
	464	QCOM_SSR_BEFORE_SHUTDOWN, &data);
	465	}
	466
1417dba1	467	static void ssr_notify_unprepare(struct rproc_subdev *subdev)
1e140df0 BA	468	{
1e140df0 BA	469	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
5abfe5cf RB	470	struct qcom_ssr_notify_data data = {
	471	.name = ssr->info->name,
	472	.crashed = false,
	473	};
1e140df0	474
62495d77 RB	475	srcu_notifier_call_chain(&ssr->info->notifier_list,
62495d77 RB	476	QCOM_SSR_AFTER_SHUTDOWN, &data);
1e140df0 BA	477	}
	478
	479	/**
	480	* qcom_add_ssr_subdev() - register subdevice as restart notification source
	481	* @rproc: rproc handle
	482	* @ssr: SSR subdevice handle
	483	* @ssr_name: identifier to use for notifications originating from @rproc
	484	*
	485	* As the @ssr is registered with the @rproc SSR events will be sent to all
5abfe5cf RB	486	* registered listeners for the remoteproc when it's SSR events occur
5abfe5cf RB	487	* (pre/post startup and pre/post shutdown).
1e140df0 BA	488	*/
	489	void qcom_add_ssr_subdev(struct rproc rproc, struct qcom_rproc_ssr ssr,
	490	const char *ssr_name)
	491	{
5abfe5cf RB	492	struct qcom_ssr_subsystem *info;
	493
	494	info = qcom_ssr_get_subsys(ssr_name);
	495	if (IS_ERR(info)) {
	496	dev_err(&rproc->dev, "Failed to add ssr subdevice\n");
	497	return;
	498	}
	499
	500	ssr->info = info;
62495d77 RB	501	ssr->subdev.prepare = ssr_notify_prepare;
	502	ssr->subdev.start = ssr_notify_start;
	503	ssr->subdev.stop = ssr_notify_stop;
1417dba1	504	ssr->subdev.unprepare = ssr_notify_unprepare;
1e140df0	505
4902676f	506	rproc_add_subdev(rproc, &ssr->subdev);
1e140df0 BA	507	}
	508	EXPORT_SYMBOL_GPL(qcom_add_ssr_subdev);
	509
	510	/**
	511	* qcom_remove_ssr_subdev() - remove subdevice as restart notification source
	512	* @rproc: rproc handle
	513	* @ssr: SSR subdevice handle
	514	*/
	515	void qcom_remove_ssr_subdev(struct rproc rproc, struct qcom_rproc_ssr ssr)
	516	{
	517	rproc_remove_subdev(rproc, &ssr->subdev);
5abfe5cf	518	ssr->info = NULL;
1e140df0 BA	519	}
	520	EXPORT_SYMBOL_GPL(qcom_remove_ssr_subdev);
	521
bde440ee BA	522	MODULE_DESCRIPTION("Qualcomm Remoteproc helper driver");
bde440ee BA	523	MODULE_LICENSE("GPL v2");