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509 lines
14 KiB
509 lines
14 KiB
// 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/remoteproc/qcom_rproc.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/slab.h> |
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#include <linux/soc/qcom/mdt_loader.h> |
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#include <linux/soc/qcom/smem.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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#define MAX_NUM_OF_SS 10 |
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#define MAX_REGION_NAME_LENGTH 16 |
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#define SBL_MINIDUMP_SMEM_ID 602 |
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#define MD_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0) |
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#define MD_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0) |
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#define MD_SS_ENABLED ('E' << 24 | 'N' << 16 | 'B' << 8 | 'L' << 0) |
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/** |
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* struct minidump_region - Minidump region |
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* @name : Name of the region to be dumped |
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* @seq_num: : Use to differentiate regions with same name. |
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* @valid : This entry to be dumped (if set to 1) |
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* @address : Physical address of region to be dumped |
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* @size : Size of the region |
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*/ |
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struct minidump_region { |
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char name[MAX_REGION_NAME_LENGTH]; |
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__le32 seq_num; |
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__le32 valid; |
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__le64 address; |
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__le64 size; |
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}; |
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/** |
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* struct minidump_subsystem_toc: Subsystem's SMEM Table of content |
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* @status : Subsystem toc init status |
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* @enabled : if set to 1, this region would be copied during coredump |
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* @encryption_status: Encryption status for this subsystem |
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* @encryption_required : Decides to encrypt the subsystem regions or not |
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* @region_count : Number of regions added in this subsystem toc |
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* @regions_baseptr : regions base pointer of the subsystem |
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*/ |
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struct minidump_subsystem { |
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__le32 status; |
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__le32 enabled; |
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__le32 encryption_status; |
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__le32 encryption_required; |
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__le32 region_count; |
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__le64 regions_baseptr; |
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}; |
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/** |
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* struct minidump_global_toc: Global Table of Content |
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* @status : Global Minidump init status |
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* @md_revision : Minidump revision |
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* @enabled : Minidump enable status |
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* @subsystems : Array of subsystems toc |
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*/ |
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struct minidump_global_toc { |
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__le32 status; |
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__le32 md_revision; |
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__le32 enabled; |
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struct minidump_subsystem subsystems[MAX_NUM_OF_SS]; |
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}; |
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struct qcom_ssr_subsystem { |
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const char *name; |
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struct srcu_notifier_head notifier_list; |
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struct list_head list; |
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}; |
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static LIST_HEAD(qcom_ssr_subsystem_list); |
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static DEFINE_MUTEX(qcom_ssr_subsys_lock); |
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static void qcom_minidump_cleanup(struct rproc *rproc) |
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{ |
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struct rproc_dump_segment *entry, *tmp; |
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list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) { |
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list_del(&entry->node); |
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kfree(entry->priv); |
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kfree(entry); |
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} |
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} |
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static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem) |
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{ |
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struct minidump_region __iomem *ptr; |
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struct minidump_region region; |
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int seg_cnt, i; |
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dma_addr_t da; |
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size_t size; |
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char *name; |
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if (WARN_ON(!list_empty(&rproc->dump_segments))) { |
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dev_err(&rproc->dev, "dump segment list already populated\n"); |
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return -EUCLEAN; |
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} |
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seg_cnt = le32_to_cpu(subsystem->region_count); |
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ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr), |
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seg_cnt * sizeof(struct minidump_region)); |
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if (!ptr) |
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return -EFAULT; |
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for (i = 0; i < seg_cnt; i++) { |
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memcpy_fromio(®ion, ptr + i, sizeof(region)); |
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if (region.valid == MD_REGION_VALID) { |
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name = kstrdup(region.name, GFP_KERNEL); |
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if (!name) { |
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iounmap(ptr); |
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return -ENOMEM; |
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} |
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da = le64_to_cpu(region.address); |
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size = le32_to_cpu(region.size); |
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rproc_coredump_add_custom_segment(rproc, da, size, NULL, name); |
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} |
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} |
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iounmap(ptr); |
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return 0; |
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} |
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void qcom_minidump(struct rproc *rproc, unsigned int minidump_id) |
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{ |
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int ret; |
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struct minidump_subsystem *subsystem; |
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struct minidump_global_toc *toc; |
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/* Get Global minidump ToC*/ |
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toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL); |
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/* check if global table pointer exists and init is set */ |
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if (IS_ERR(toc) || !toc->status) { |
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dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n"); |
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return; |
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} |
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/* Get subsystem table of contents using the minidump id */ |
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subsystem = &toc->subsystems[minidump_id]; |
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/** |
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* Collect minidump if SS ToC is valid and segment table |
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* is initialized in memory and encryption status is set. |
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*/ |
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if (subsystem->regions_baseptr == 0 || |
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le32_to_cpu(subsystem->status) != 1 || |
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le32_to_cpu(subsystem->enabled) != MD_SS_ENABLED || |
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le32_to_cpu(subsystem->encryption_status) != MD_SS_ENCR_DONE) { |
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dev_err(&rproc->dev, "Minidump not ready, skipping\n"); |
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return; |
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} |
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ret = qcom_add_minidump_segments(rproc, subsystem); |
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if (ret) { |
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dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret); |
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goto clean_minidump; |
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} |
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rproc_coredump_using_sections(rproc); |
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clean_minidump: |
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qcom_minidump_cleanup(rproc); |
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} |
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EXPORT_SYMBOL_GPL(qcom_minidump); |
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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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static struct qcom_ssr_subsystem *qcom_ssr_get_subsys(const char *name) |
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{ |
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struct qcom_ssr_subsystem *info; |
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mutex_lock(&qcom_ssr_subsys_lock); |
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/* Match in the global qcom_ssr_subsystem_list with name */ |
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list_for_each_entry(info, &qcom_ssr_subsystem_list, list) |
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if (!strcmp(info->name, name)) |
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goto out; |
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info = kzalloc(sizeof(*info), GFP_KERNEL); |
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if (!info) { |
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info = ERR_PTR(-ENOMEM); |
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goto out; |
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} |
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info->name = kstrdup_const(name, GFP_KERNEL); |
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srcu_init_notifier_head(&info->notifier_list); |
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/* Add to global notification list */ |
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list_add_tail(&info->list, &qcom_ssr_subsystem_list); |
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out: |
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mutex_unlock(&qcom_ssr_subsys_lock); |
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return info; |
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} |
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/** |
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* qcom_register_ssr_notifier() - register SSR notification handler |
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* @name: Subsystem's SSR name |
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* @nb: notifier_block to be invoked upon subsystem's state change |
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* |
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* This registers the @nb notifier block as part the notifier chain for a |
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* remoteproc associated with @name. The notifier block's callback |
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* will be invoked when the remote processor's SSR events occur |
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* (pre/post startup and pre/post shutdown). |
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* |
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* Return: a subsystem cookie on success, ERR_PTR on failure. |
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*/ |
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void *qcom_register_ssr_notifier(const char *name, struct notifier_block *nb) |
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{ |
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struct qcom_ssr_subsystem *info; |
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info = qcom_ssr_get_subsys(name); |
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if (IS_ERR(info)) |
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return info; |
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srcu_notifier_chain_register(&info->notifier_list, nb); |
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return &info->notifier_list; |
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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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* @notify: subsystem cookie returned from qcom_register_ssr_notifier |
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* @nb: notifier_block to unregister |
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* |
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* This function will unregister the notifier from the particular notifier |
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* chain. |
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* |
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* Return: 0 on success, %ENOENT otherwise. |
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*/ |
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int qcom_unregister_ssr_notifier(void *notify, struct notifier_block *nb) |
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{ |
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return srcu_notifier_chain_unregister(notify, nb); |
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} |
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EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier); |
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static int ssr_notify_prepare(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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struct qcom_ssr_notify_data data = { |
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.name = ssr->info->name, |
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.crashed = false, |
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}; |
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srcu_notifier_call_chain(&ssr->info->notifier_list, |
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QCOM_SSR_BEFORE_POWERUP, &data); |
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return 0; |
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} |
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static int ssr_notify_start(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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struct qcom_ssr_notify_data data = { |
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.name = ssr->info->name, |
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.crashed = false, |
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}; |
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srcu_notifier_call_chain(&ssr->info->notifier_list, |
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QCOM_SSR_AFTER_POWERUP, &data); |
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return 0; |
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} |
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static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed) |
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{ |
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struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev); |
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struct qcom_ssr_notify_data data = { |
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.name = ssr->info->name, |
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.crashed = crashed, |
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}; |
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srcu_notifier_call_chain(&ssr->info->notifier_list, |
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QCOM_SSR_BEFORE_SHUTDOWN, &data); |
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} |
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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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struct qcom_ssr_notify_data data = { |
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.name = ssr->info->name, |
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.crashed = false, |
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}; |
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srcu_notifier_call_chain(&ssr->info->notifier_list, |
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QCOM_SSR_AFTER_SHUTDOWN, &data); |
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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 for the remoteproc when it's SSR events occur |
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* (pre/post startup and pre/post shutdown). |
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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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struct qcom_ssr_subsystem *info; |
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info = qcom_ssr_get_subsys(ssr_name); |
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if (IS_ERR(info)) { |
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dev_err(&rproc->dev, "Failed to add ssr subdevice\n"); |
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return; |
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} |
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ssr->info = info; |
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ssr->subdev.prepare = ssr_notify_prepare; |
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ssr->subdev.start = ssr_notify_start; |
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ssr->subdev.stop = ssr_notify_stop; |
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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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ssr->info = NULL; |
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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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