257 строки
6.8 KiB
C
257 строки
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Qualcomm Peripheral Image Loader helpers
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*
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* Copyright (C) 2016 Linaro Ltd
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* Copyright (C) 2015 Sony Mobile Communications Inc
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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*/
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#include <linux/firmware.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/notifier.h>
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#include <linux/remoteproc.h>
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#include <linux/rpmsg/qcom_glink.h>
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#include <linux/rpmsg/qcom_smd.h>
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#include <linux/soc/qcom/mdt_loader.h>
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#include "remoteproc_internal.h"
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#include "qcom_common.h"
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#define to_glink_subdev(d) container_of(d, struct qcom_rproc_glink, subdev)
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#define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
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#define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)
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static BLOCKING_NOTIFIER_HEAD(ssr_notifiers);
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static int glink_subdev_start(struct rproc_subdev *subdev)
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{
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struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
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glink->edge = qcom_glink_smem_register(glink->dev, glink->node);
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return PTR_ERR_OR_ZERO(glink->edge);
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}
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static void glink_subdev_stop(struct rproc_subdev *subdev, bool crashed)
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{
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struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
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qcom_glink_smem_unregister(glink->edge);
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glink->edge = NULL;
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}
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static void glink_subdev_unprepare(struct rproc_subdev *subdev)
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{
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struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
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qcom_glink_ssr_notify(glink->ssr_name);
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}
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/**
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* qcom_add_glink_subdev() - try to add a GLINK subdevice to rproc
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* @rproc: rproc handle to parent the subdevice
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* @glink: reference to a GLINK subdev context
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* @ssr_name: identifier of the associated remoteproc for ssr notifications
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*/
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void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink,
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const char *ssr_name)
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{
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struct device *dev = &rproc->dev;
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glink->node = of_get_child_by_name(dev->parent->of_node, "glink-edge");
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if (!glink->node)
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return;
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glink->ssr_name = kstrdup_const(ssr_name, GFP_KERNEL);
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if (!glink->ssr_name)
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return;
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glink->dev = dev;
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glink->subdev.start = glink_subdev_start;
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glink->subdev.stop = glink_subdev_stop;
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glink->subdev.unprepare = glink_subdev_unprepare;
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rproc_add_subdev(rproc, &glink->subdev);
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}
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EXPORT_SYMBOL_GPL(qcom_add_glink_subdev);
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/**
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* qcom_remove_glink_subdev() - remove a GLINK subdevice from rproc
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* @rproc: rproc handle
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* @glink: reference to a GLINK subdev context
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*/
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void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
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{
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if (!glink->node)
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return;
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rproc_remove_subdev(rproc, &glink->subdev);
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kfree_const(glink->ssr_name);
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of_node_put(glink->node);
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}
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EXPORT_SYMBOL_GPL(qcom_remove_glink_subdev);
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/**
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* qcom_register_dump_segments() - register segments for coredump
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* @rproc: remoteproc handle
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* @fw: firmware header
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*
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* Register all segments of the ELF in the remoteproc coredump segment list
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*
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* Return: 0 on success, negative errno on failure.
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*/
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int qcom_register_dump_segments(struct rproc *rproc,
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const struct firmware *fw)
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{
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const struct elf32_phdr *phdrs;
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const struct elf32_phdr *phdr;
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const struct elf32_hdr *ehdr;
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int ret;
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int i;
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ehdr = (struct elf32_hdr *)fw->data;
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phdrs = (struct elf32_phdr *)(ehdr + 1);
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for (i = 0; i < ehdr->e_phnum; i++) {
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phdr = &phdrs[i];
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if (phdr->p_type != PT_LOAD)
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continue;
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if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
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continue;
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if (!phdr->p_memsz)
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continue;
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ret = rproc_coredump_add_segment(rproc, phdr->p_paddr,
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phdr->p_memsz);
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if (ret)
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(qcom_register_dump_segments);
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static int smd_subdev_start(struct rproc_subdev *subdev)
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{
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struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
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smd->edge = qcom_smd_register_edge(smd->dev, smd->node);
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return PTR_ERR_OR_ZERO(smd->edge);
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}
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static void smd_subdev_stop(struct rproc_subdev *subdev, bool crashed)
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{
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struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
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qcom_smd_unregister_edge(smd->edge);
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smd->edge = NULL;
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}
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/**
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* qcom_add_smd_subdev() - try to add a SMD subdevice to rproc
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* @rproc: rproc handle to parent the subdevice
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* @smd: reference to a Qualcomm subdev context
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*/
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void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
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{
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struct device *dev = &rproc->dev;
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smd->node = of_get_child_by_name(dev->parent->of_node, "smd-edge");
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if (!smd->node)
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return;
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smd->dev = dev;
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smd->subdev.start = smd_subdev_start;
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smd->subdev.stop = smd_subdev_stop;
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rproc_add_subdev(rproc, &smd->subdev);
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}
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EXPORT_SYMBOL_GPL(qcom_add_smd_subdev);
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/**
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* qcom_remove_smd_subdev() - remove the smd subdevice from rproc
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* @rproc: rproc handle
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* @smd: the SMD subdevice to remove
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*/
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void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
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{
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if (!smd->node)
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return;
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rproc_remove_subdev(rproc, &smd->subdev);
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of_node_put(smd->node);
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}
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EXPORT_SYMBOL_GPL(qcom_remove_smd_subdev);
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/**
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* qcom_register_ssr_notifier() - register SSR notification handler
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* @nb: notifier_block to notify for restart notifications
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*
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* Returns 0 on success, negative errno on failure.
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*
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* This register the @notify function as handler for restart notifications. As
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* remote processors are stopped this function will be called, with the SSR
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* name passed as a parameter.
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*/
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int qcom_register_ssr_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_register(&ssr_notifiers, nb);
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}
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EXPORT_SYMBOL_GPL(qcom_register_ssr_notifier);
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/**
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* qcom_unregister_ssr_notifier() - unregister SSR notification handler
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* @nb: notifier_block to unregister
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*/
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void qcom_unregister_ssr_notifier(struct notifier_block *nb)
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{
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blocking_notifier_chain_unregister(&ssr_notifiers, nb);
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}
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EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier);
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static void ssr_notify_unprepare(struct rproc_subdev *subdev)
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{
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struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
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blocking_notifier_call_chain(&ssr_notifiers, 0, (void *)ssr->name);
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}
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/**
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* qcom_add_ssr_subdev() - register subdevice as restart notification source
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* @rproc: rproc handle
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* @ssr: SSR subdevice handle
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* @ssr_name: identifier to use for notifications originating from @rproc
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*
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* As the @ssr is registered with the @rproc SSR events will be sent to all
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* registered listeners in the system as the remoteproc is shut down.
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*/
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void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
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const char *ssr_name)
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{
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ssr->name = ssr_name;
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ssr->subdev.unprepare = ssr_notify_unprepare;
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rproc_add_subdev(rproc, &ssr->subdev);
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}
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EXPORT_SYMBOL_GPL(qcom_add_ssr_subdev);
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/**
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* qcom_remove_ssr_subdev() - remove subdevice as restart notification source
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* @rproc: rproc handle
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* @ssr: SSR subdevice handle
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*/
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void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr)
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{
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rproc_remove_subdev(rproc, &ssr->subdev);
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}
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EXPORT_SYMBOL_GPL(qcom_remove_ssr_subdev);
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MODULE_DESCRIPTION("Qualcomm Remoteproc helper driver");
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MODULE_LICENSE("GPL v2");
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