Re: [PATCH v8 1/4] remoteproc: core: Add ops to enable custom coredump functionality

Re: [PATCH v8 1/4] remoteproc: core: Add ops to enable custom coredump functionality

[Bjorn Andersson]

On Thu 19 Nov 15:05 CST 2020, Siddharth Gupta wrote:

> Each remoteproc might have different requirements for coredumps and might
> want to choose the type of dumps it wants to collect. This change allows
> remoteproc drivers to specify their own custom dump function to be executed
> in place of rproc_coredump. If the coredump op is not specified by the
> remoteproc driver it will be set to rproc_coredump by default.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
> ---
>  drivers/remoteproc/remoteproc_core.c | 6 +++++-
>  include/linux/remoteproc.h           | 2 ++
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index dab2c0f..eba7543 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1704,7 +1704,7 @@ int rproc_trigger_recovery(struct rproc *rproc)
>  		goto unlock_mutex;
>  
>  	/* generate coredump */
> -	rproc_coredump(rproc);
> +	rproc->ops->coredump(rproc);
>  
>  	/* load firmware */
>  	ret = request_firmware(&firmware_p, rproc->firmware, dev);
> @@ -2126,6 +2126,10 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
>  	if (!rproc->ops)
>  		return -ENOMEM;
>  
> +	/* Default to rproc_coredump if no coredump function is specified */
> +	if (!rproc->ops->coredump)
> +		rproc->ops->coredump = rproc_coredump;
> +
>  	if (rproc->ops->load)
>  		return 0;
>  
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 3fa3ba6..a419878 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -375,6 +375,7 @@ enum rsc_handling_status {
>   * @get_boot_addr:	get boot address to entry point specified in firmware
>   * @panic:	optional callback to react to system panic, core will delay
>   *		panic at least the returned number of milliseconds
> + * @coredump:	  collect firmware dump after the subsystem is shutdown
>   */
>  struct rproc_ops {
>  	int (*prepare)(struct rproc *rproc);
> @@ -393,6 +394,7 @@ struct rproc_ops {
>  	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
>  	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>  	unsigned long (*panic)(struct rproc *rproc);
> +	void (*coredump)(struct rproc *rproc);
>  };
>  
>  /**
> -- 
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

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Re: [PATCH v8 2/4] remoteproc: coredump: Add minidump functionality

[Bjorn Andersson]

On Thu 19 Nov 15:05 CST 2020, Siddharth Gupta wrote:

> This change adds a new kind of core dump mechanism which instead of dumping
> entire program segments of the firmware, dumps sections of the remoteproc
> memory which are sufficient to allow debugging the firmware. This function
> thus uses section headers instead of program headers during creation of the
> core dump elf.
> 
> Co-developed-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  drivers/remoteproc/remoteproc_coredump.c    | 140 ++++++++++++++++++++++++++++
>  drivers/remoteproc/remoteproc_elf_helpers.h |  26 ++++++
>  include/linux/remoteproc.h                  |   1 +
>  3 files changed, 167 insertions(+)
> 
> diff --git a/drivers/remoteproc/remoteproc_coredump.c b/drivers/remoteproc/remoteproc_coredump.c
> index 34530dc..81ec154 100644
> --- a/drivers/remoteproc/remoteproc_coredump.c
> +++ b/drivers/remoteproc/remoteproc_coredump.c
> @@ -323,3 +323,143 @@ void rproc_coredump(struct rproc *rproc)
>  	 */
>  	wait_for_completion(&dump_state.dump_done);
>  }
> +
> +/**
> + * rproc_coredump_using_sections() - perform coredump using section headers
> + * @rproc:	rproc handle
> + *
> + * This function will generate an ELF header for the registered sections of
> + * segments and create a devcoredump device associated with rproc. Based on
> + * the coredump configuration this function will directly copy the segments
> + * from device memory to userspace or copy segments from device memory to
> + * a separate buffer, which can then be read by userspace.
> + * The first approach avoids using extra vmalloc memory. But it will stall
> + * recovery flow until dump is read by userspace.
> + */
> +void rproc_coredump_using_sections(struct rproc *rproc)
> +{
> +	struct rproc_dump_segment *segment;
> +	void *shdr;
> +	void *ehdr;
> +	size_t data_size;
> +	size_t strtbl_size = 0;
> +	size_t strtbl_index = 1;
> +	size_t offset;
> +	void *data;
> +	u8 class = rproc->elf_class;
> +	int shnum;
> +	struct rproc_coredump_state dump_state;
> +	unsigned int dump_conf = rproc->dump_conf;
> +	char *str_tbl = "STR_TBL";
> +
> +	if (list_empty(&rproc->dump_segments) ||
> +	    dump_conf == RPROC_COREDUMP_DISABLED)
> +		return;
> +
> +	if (class == ELFCLASSNONE) {
> +		dev_err(&rproc->dev, "Elf class is not set\n");
> +		return;
> +	}
> +
> +	/*
> +	 * We allocate two extra section headers. The first one is null.
> +	 * Second section header is for the string table. Also space is
> +	 * allocated for string table.
> +	 */
> +	data_size = elf_size_of_hdr(class) + 2 * elf_size_of_shdr(class);
> +	shnum = 2;
> +
> +	/* the extra byte is for the null character at index 0 */
> +	strtbl_size += strlen(str_tbl) + 2;
> +
> +	list_for_each_entry(segment, &rproc->dump_segments, node) {
> +		data_size += elf_size_of_shdr(class);
> +		strtbl_size += strlen(segment->priv) + 1;
> +		if (dump_conf == RPROC_COREDUMP_ENABLED)
> +			data_size += segment->size;
> +		shnum++;
> +	}
> +
> +	data_size += strtbl_size;
> +
> +	data = vmalloc(data_size);
> +	if (!data)
> +		return;
> +
> +	ehdr = data;
> +	memset(ehdr, 0, elf_size_of_hdr(class));
> +	/* e_ident field is common for both elf32 and elf64 */
> +	elf_hdr_init_ident(ehdr, class);
> +
> +	elf_hdr_set_e_type(class, ehdr, ET_CORE);
> +	elf_hdr_set_e_machine(class, ehdr, rproc->elf_machine);
> +	elf_hdr_set_e_version(class, ehdr, EV_CURRENT);
> +	elf_hdr_set_e_entry(class, ehdr, rproc->bootaddr);
> +	elf_hdr_set_e_shoff(class, ehdr, elf_size_of_hdr(class));
> +	elf_hdr_set_e_ehsize(class, ehdr, elf_size_of_hdr(class));
> +	elf_hdr_set_e_shentsize(class, ehdr, elf_size_of_shdr(class));
> +	elf_hdr_set_e_shnum(class, ehdr, shnum);
> +	elf_hdr_set_e_shstrndx(class, ehdr, 1);
> +
> +	/*
> +	 * The zeroth index of the section header is reserved and is rarely used.
> +	 * Set the section header as null (SHN_UNDEF) and move to the next one.
> +	 */
> +	shdr = data + elf_hdr_get_e_shoff(class, ehdr);
> +	memset(shdr, 0, elf_size_of_shdr(class));
> +	shdr += elf_size_of_shdr(class);
> +
> +	/* Initialize the string table. */
> +	offset = elf_hdr_get_e_shoff(class, ehdr) +
> +		 elf_size_of_shdr(class) * elf_hdr_get_e_shnum(class, ehdr);
> +	memset(data + offset, 0, strtbl_size);
> +
> +	/* Fill in the string table section header. */
> +	memset(shdr, 0, elf_size_of_shdr(class));
> +	elf_shdr_set_sh_type(class, shdr, SHT_STRTAB);
> +	elf_shdr_set_sh_offset(class, shdr, offset);
> +	elf_shdr_set_sh_size(class, shdr, strtbl_size);
> +	elf_shdr_set_sh_entsize(class, shdr, 0);
> +	elf_shdr_set_sh_flags(class, shdr, 0);
> +	elf_shdr_set_sh_name(class, shdr, elf_strtbl_add(str_tbl, ehdr, class, &strtbl_index));
> +	offset += elf_shdr_get_sh_size(class, shdr);
> +	shdr += elf_size_of_shdr(class);
> +
> +	list_for_each_entry(segment, &rproc->dump_segments, node) {
> +		memset(shdr, 0, elf_size_of_shdr(class));
> +		elf_shdr_set_sh_type(class, shdr, SHT_PROGBITS);
> +		elf_shdr_set_sh_offset(class, shdr, offset);
> +		elf_shdr_set_sh_addr(class, shdr, segment->da);
> +		elf_shdr_set_sh_size(class, shdr, segment->size);
> +		elf_shdr_set_sh_entsize(class, shdr, 0);
> +		elf_shdr_set_sh_flags(class, shdr, SHF_WRITE);
> +		elf_shdr_set_sh_name(class, shdr,
> +				     elf_strtbl_add(segment->priv, ehdr, class, &strtbl_index));
> +
> +		/* No need to copy segments for inline dumps */
> +		if (dump_conf == RPROC_COREDUMP_ENABLED)
> +			rproc_copy_segment(rproc, data + offset, segment, 0,
> +					   segment->size);
> +		offset += elf_shdr_get_sh_size(class, shdr);
> +		shdr += elf_size_of_shdr(class);
> +	}
> +
> +	if (dump_conf == RPROC_COREDUMP_ENABLED) {
> +		dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL);
> +		return;
> +	}
> +
> +	/* Initialize the dump state struct to be used by rproc_coredump_read */
> +	dump_state.rproc = rproc;
> +	dump_state.header = data;
> +	init_completion(&dump_state.dump_done);
> +
> +	dev_coredumpm(&rproc->dev, NULL, &dump_state, data_size, GFP_KERNEL,
> +		      rproc_coredump_read, rproc_coredump_free);
> +
> +	/* Wait until the dump is read and free is called. Data is freed
> +	 * by devcoredump framework automatically after 5 minutes.
> +	 */
> +	wait_for_completion(&dump_state.dump_done);
> +}
> +EXPORT_SYMBOL(rproc_coredump_using_sections);
> diff --git a/drivers/remoteproc/remoteproc_elf_helpers.h b/drivers/remoteproc/remoteproc_elf_helpers.h
> index 4b6be7b..26404e6 100644
> --- a/drivers/remoteproc/remoteproc_elf_helpers.h
> +++ b/drivers/remoteproc/remoteproc_elf_helpers.h
> @@ -65,6 +65,7 @@ ELF_GEN_FIELD_GET_SET(hdr, e_type, u16)
>  ELF_GEN_FIELD_GET_SET(hdr, e_version, u32)
>  ELF_GEN_FIELD_GET_SET(hdr, e_ehsize, u32)
>  ELF_GEN_FIELD_GET_SET(hdr, e_phentsize, u16)
> +ELF_GEN_FIELD_GET_SET(hdr, e_shentsize, u16)
>  
>  ELF_GEN_FIELD_GET_SET(phdr, p_paddr, u64)
>  ELF_GEN_FIELD_GET_SET(phdr, p_vaddr, u64)
> @@ -75,6 +76,9 @@ ELF_GEN_FIELD_GET_SET(phdr, p_offset, u64)
>  ELF_GEN_FIELD_GET_SET(phdr, p_flags, u32)
>  ELF_GEN_FIELD_GET_SET(phdr, p_align, u64)
>  
> +ELF_GEN_FIELD_GET_SET(shdr, sh_type, u32)
> +ELF_GEN_FIELD_GET_SET(shdr, sh_flags, u32)
> +ELF_GEN_FIELD_GET_SET(shdr, sh_entsize, u16)
>  ELF_GEN_FIELD_GET_SET(shdr, sh_size, u64)
>  ELF_GEN_FIELD_GET_SET(shdr, sh_offset, u64)
>  ELF_GEN_FIELD_GET_SET(shdr, sh_name, u32)
> @@ -93,4 +97,26 @@ ELF_STRUCT_SIZE(shdr)
>  ELF_STRUCT_SIZE(phdr)
>  ELF_STRUCT_SIZE(hdr)
>  
> +static inline unsigned int elf_strtbl_add(const char *name, void *ehdr, u8 class, size_t *index)
> +{
> +	u16 shstrndx = elf_hdr_get_e_shstrndx(class, ehdr);
> +	void *shdr;
> +	char *strtab;
> +	size_t idx, ret;
> +
> +	shdr = ehdr + elf_size_of_hdr(class) + shstrndx * elf_size_of_shdr(class);
> +	strtab = ehdr + elf_shdr_get_sh_offset(class, shdr);
> +	idx = index ? *index : 0;
> +	if (!strtab || !name)
> +		return 0;
> +
> +	ret = idx;
> +	strcpy((strtab + idx), name);
> +	idx += strlen(name) + 1;
> +	if (index)
> +		*index = idx;
> +
> +	return ret;
> +}
> +
>  #endif /* REMOTEPROC_ELF_LOADER_H */
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index a419878..cdf2722 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -656,6 +656,7 @@ rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, size_t len,
>  int rproc_boot(struct rproc *rproc);
>  void rproc_shutdown(struct rproc *rproc);
>  void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type);
> +void rproc_coredump_using_sections(struct rproc *rproc);
>  int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size);
>  int rproc_coredump_add_custom_segment(struct rproc *rproc,
>  				      dma_addr_t da, size_t size,
> -- 
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

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Re: [PATCH v8 3/4] remoteproc: qcom: Add capability to collect minidumps

[Bjorn Andersson]

On Thu 19 Nov 15:05 CST 2020, Siddharth Gupta wrote:

> 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.
> 
> Co-developed-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> Co-developed-by: Gurbir Arora <gurbaror@codeaurora.org>
> Signed-off-by: Gurbir Arora <gurbaror@codeaurora.org>
> Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  drivers/remoteproc/qcom_common.c   | 147 +++++++++++++++++++++++++++++++++++++
>  drivers/remoteproc/qcom_common.h   |   2 +
>  drivers/remoteproc/qcom_q6v5_pas.c |  27 ++++++-
>  3 files changed, 174 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c
> index 085fd73..c41c3a5 100644
> --- a/drivers/remoteproc/qcom_common.c
> +++ b/drivers/remoteproc/qcom_common.c
> @@ -17,6 +17,7 @@
>  #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"
> @@ -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 +90,97 @@ 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(&region, 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 dfc641c..a359f16 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 3837f23..ca05c2ef 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;
> -- 
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

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Re: [PATCH v8 4/4] remoteproc: qcom: Add minidump id for sm8150 modem

[Bjorn Andersson]

On Thu 19 Nov 15:05 CST 2020, Siddharth Gupta wrote:

> Add minidump id for modem in sm8150 chipset so that the regions to be
> included in the coredump generated upon a crash is based on the minidump
> tables in SMEM instead of those in the ELF header.
> 
> Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>

When reposting patches without modifications, please add any
Acked-by, Reviewed-by or Tested-by that you received previously.


Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  drivers/remoteproc/qcom_q6v5_pas.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
> index ca05c2ef..e61ef88 100644
> --- a/drivers/remoteproc/qcom_q6v5_pas.c
> +++ b/drivers/remoteproc/qcom_q6v5_pas.c
> @@ -630,6 +630,7 @@ static const struct adsp_data mpss_resource_init = {
>  	.crash_reason_smem = 421,
>  	.firmware_name = "modem.mdt",
>  	.pas_id = 4,
> +	.minidump_id = 3,
>  	.has_aggre2_clk = false,
>  	.auto_boot = false,
>  	.active_pd_names = (char*[]){
> -- 
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

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