From 8ed8485c4f056d488d17a2b56581c86aeb42955d Mon Sep 17 00:00:00 2001 From: Siddharth Gupta Date: Thu, 19 Nov 2020 13:05:34 -0800 Subject: remoteproc: qcom: Add capability to collect minidumps This patch adds support for collecting minidump in the event of remoteproc crash. Parse the minidump table based on remoteproc's unique minidump-id, read all memory regions from the remoteproc's minidump table entry and expose the memory to userspace. The remoteproc platform driver can choose to collect a full/mini dump by specifying the coredump op. Reviewed-by: Bjorn Andersson Co-developed-by: Rishabh Bhatnagar Signed-off-by: Rishabh Bhatnagar Co-developed-by: Gurbir Arora Signed-off-by: Gurbir Arora Signed-off-by: Siddharth Gupta Link: https://lore.kernel.org/r/1605819935-10726-4-git-send-email-sidgup@codeaurora.org Signed-off-by: Bjorn Andersson --- drivers/remoteproc/qcom_common.c | 146 +++++++++++++++++++++++++++++++++++++ drivers/remoteproc/qcom_common.h | 2 + drivers/remoteproc/qcom_q6v5_pas.c | 27 ++++++- 3 files changed, 173 insertions(+), 2 deletions(-) (limited to 'drivers/remoteproc') diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c index 085fd73fa23a..4b91e3c9eafa 100644 --- a/drivers/remoteproc/qcom_common.c +++ b/drivers/remoteproc/qcom_common.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "remoteproc_internal.h" #include "qcom_common.h" @@ -25,6 +26,61 @@ #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 MD_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0) +#define MD_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0) +#define MD_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_toc: 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; @@ -34,6 +90,96 @@ struct qcom_ssr_subsystem { 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) +{ + 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(®ion, ptr + i, sizeof(region)); + if (region.valid == MD_REGION_VALID) { + name = kstrdup(region.name, GFP_KERNEL); + if (!name) { + iounmap(ptr); + return -ENOMEM; + } + da = le64_to_cpu(region.address); + size = le32_to_cpu(region.size); + rproc_coredump_add_custom_segment(rproc, da, size, NULL, name); + } + } + + iounmap(ptr); + return 0; +} + +void qcom_minidump(struct rproc *rproc, unsigned int minidump_id) +{ + 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) != MD_SS_ENABLED || + le32_to_cpu(subsystem->encryption_status) != MD_SS_ENCR_DONE) { + dev_err(&rproc->dev, "Minidump not ready, skipping\n"); + return; + } + + ret = qcom_add_minidump_segments(rproc, subsystem); + 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); diff --git a/drivers/remoteproc/qcom_common.h b/drivers/remoteproc/qcom_common.h index 8ba9052955bd..c35adf730be0 100644 --- a/drivers/remoteproc/qcom_common.h +++ b/drivers/remoteproc/qcom_common.h @@ -33,6 +33,8 @@ struct qcom_rproc_ssr { struct qcom_ssr_subsystem *info; }; +void qcom_minidump(struct rproc *rproc, unsigned int minidump_id); + void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink, const char *ssr_name); void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink); diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c index ed1772bfa55d..b4bfbf2de1f4 100644 --- a/drivers/remoteproc/qcom_q6v5_pas.c +++ b/drivers/remoteproc/qcom_q6v5_pas.c @@ -33,6 +33,7 @@ struct adsp_data { int crash_reason_smem; const char *firmware_name; int pas_id; + unsigned int minidump_id; bool has_aggre2_clk; bool auto_boot; @@ -63,6 +64,7 @@ struct qcom_adsp { int proxy_pd_count; int pas_id; + unsigned int minidump_id; int crash_reason_smem; bool has_aggre2_clk; const char *info_name; @@ -81,6 +83,13 @@ struct qcom_adsp { struct qcom_sysmon *sysmon; }; +static void adsp_minidump(struct rproc *rproc) +{ + struct qcom_adsp *adsp = rproc->priv; + + qcom_minidump(rproc, adsp->minidump_id); +} + static int adsp_pds_enable(struct qcom_adsp *adsp, struct device **pds, size_t pd_count) { @@ -258,6 +267,15 @@ static const struct rproc_ops adsp_ops = { .panic = adsp_panic, }; +static const struct rproc_ops adsp_minidump_ops = { + .start = adsp_start, + .stop = adsp_stop, + .da_to_va = adsp_da_to_va, + .load = adsp_load, + .panic = adsp_panic, + .coredump = adsp_minidump, +}; + static int adsp_init_clock(struct qcom_adsp *adsp) { int ret; @@ -383,6 +401,7 @@ static int adsp_probe(struct platform_device *pdev) struct qcom_adsp *adsp; struct rproc *rproc; const char *fw_name; + const struct rproc_ops *ops = &adsp_ops; int ret; desc = of_device_get_match_data(&pdev->dev); @@ -398,8 +417,11 @@ static int adsp_probe(struct platform_device *pdev) if (ret < 0 && ret != -EINVAL) return ret; - rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops, - fw_name, sizeof(*adsp)); + if (desc->minidump_id) + ops = &adsp_minidump_ops; + + rproc = rproc_alloc(&pdev->dev, pdev->name, ops, fw_name, sizeof(*adsp)); + if (!rproc) { dev_err(&pdev->dev, "unable to allocate remoteproc\n"); return -ENOMEM; @@ -411,6 +433,7 @@ static int adsp_probe(struct platform_device *pdev) adsp = (struct qcom_adsp *)rproc->priv; adsp->dev = &pdev->dev; adsp->rproc = rproc; + adsp->minidump_id = desc->minidump_id; adsp->pas_id = desc->pas_id; adsp->has_aggre2_clk = desc->has_aggre2_clk; adsp->info_name = desc->sysmon_name; -- cgit v1.2.3