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remoteproc: qcom: Register segments for core dump

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Register MDT segments with the remoteproc core dump functionality in
order to include them in a core dump, in case of a recovery of the remote
processor.

Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Sarangdhar Joshi 2018-01-05 16:04:20 -08:00 committed by Bjorn Andersson
parent 4dd27f544c
commit dcb57ed43d
4 changed files with 48 additions and 0 deletions
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1
drivers/remoteproc/qcom_adsp_pil.c
View File

@ -179,6 +179,7 @@ static const struct rproc_ops adsp_ops = {
.start = adsp_start,
.stop = adsp_stop,
.da_to_va = adsp_da_to_va,
.parse_fw = qcom_register_dump_segments,
.load = adsp_load,
};

44
drivers/remoteproc/qcom_common.c
View File

@ -22,6 +22,7 @@
#include <linux/remoteproc.h>
#include <linux/rpmsg/qcom_glink.h>
#include <linux/rpmsg/qcom_smd.h>
#include <linux/soc/qcom/mdt_loader.h>
#include "remoteproc_internal.h"
#include "qcom_common.h"
@ -79,6 +80,49 @@ void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glin
}
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_probe(struct rproc_subdev *subdev)
{
struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);

2
drivers/remoteproc/qcom_common.h
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@ -30,6 +30,8 @@ struct qcom_rproc_ssr {
void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink);
void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink);
int qcom_register_dump_segments(struct rproc *rproc, const struct firmware *fw);
void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd);
void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd);

1
drivers/remoteproc/qcom_wcnss.c
View File

@ -309,6 +309,7 @@ static const struct rproc_ops wcnss_ops = {
.start = wcnss_start,
.stop = wcnss_stop,
.da_to_va = wcnss_da_to_va,
.parse_fw = qcom_register_dump_segments,
.load = wcnss_load,
};