Add qcom_rproc_minidump module in a preparation to remove
minidump specific code from driver/remoteproc/qcom_common.c
and provide needed exported API, this as well helps to
abstract minidump specific data layout from qualcomm's
remoteproc driver.
It is just a copying of qcom_minidump() functionality from
driver/remoteproc/qcom_common.c into a separate file under
qcom_rproc_minidump().
Signed-off-by: Mukesh Ojha <[email protected]>
---
Changes in v9:
- Added source file driver/remoteproc/qcom_common.c copyright
to qcom_rproc_minidump.c
- Dissociated it from minidump series as this can go separately
and minidump can put it dependency for the data structure files.
Nothing much changed in these three patches from previous version,
However, giving the link of their older versions.
v8: https://lore.kernel.org/lkml/[email protected]/
v7: https://lore.kernel.org/lkml/[email protected]/
v6: https://lore.kernel.org/lkml/[email protected]/
v5: https://lore.kernel.org/lkml/[email protected]/
v4: https://lore.kernel.org/lkml/[email protected]/
drivers/soc/qcom/Kconfig | 10 +++
drivers/soc/qcom/Makefile | 1 +
drivers/soc/qcom/qcom_minidump_internal.h | 64 +++++++++++++++++
drivers/soc/qcom/qcom_rproc_minidump.c | 115 ++++++++++++++++++++++++++++++
include/soc/qcom/qcom_minidump.h | 23 ++++++
5 files changed, 213 insertions(+)
create mode 100644 drivers/soc/qcom/qcom_minidump_internal.h
create mode 100644 drivers/soc/qcom/qcom_rproc_minidump.c
create mode 100644 include/soc/qcom/qcom_minidump.h
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index 5af33b0e3470..ed23e0275c22 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -277,4 +277,14 @@ config QCOM_PBS
This module provides the APIs to the client drivers that wants to send the
PBS trigger event to the PBS RAM.
+config QCOM_RPROC_MINIDUMP
+ tristate "QCOM Remoteproc Minidump Support"
+ depends on ARCH_QCOM || COMPILE_TEST
+ depends on QCOM_SMEM
+ help
+ Enablement of core Minidump feature is controlled from boot firmware
+ side, so if it is enabled from firmware, this config allow Linux to
+ query predefined Minidump segments associated with the remote processor
+ and check its validity and end up collecting the dump on remote processor
+ crash during its recovery.
endmenu
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index ca0bece0dfff..44664589263d 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -36,3 +36,4 @@ obj-$(CONFIG_QCOM_ICC_BWMON) += icc-bwmon.o
qcom_ice-objs += ice.o
obj-$(CONFIG_QCOM_INLINE_CRYPTO_ENGINE) += qcom_ice.o
obj-$(CONFIG_QCOM_PBS) += qcom-pbs.o
+obj-$(CONFIG_QCOM_RPROC_MINIDUMP) += qcom_rproc_minidump.o
diff --git a/drivers/soc/qcom/qcom_minidump_internal.h b/drivers/soc/qcom/qcom_minidump_internal.h
new file mode 100644
index 000000000000..71709235b196
--- /dev/null
+++ b/drivers/soc/qcom/qcom_minidump_internal.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _QCOM_MINIDUMP_INTERNAL_H_
+#define _QCOM_MINIDUMP_INTERNAL_H_
+
+#define MAX_NUM_OF_SS 10
+#define MAX_REGION_NAME_LENGTH 16
+#define SBL_MINIDUMP_SMEM_ID 602
+#define MINIDUMP_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
+#define MINIDUMP_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
+#define MINIDUMP_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 - 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];
+};
+
+#endif /* _QCOM_MINIDUMP_INTERNAL_H_ */
diff --git a/drivers/soc/qcom/qcom_rproc_minidump.c b/drivers/soc/qcom/qcom_rproc_minidump.c
new file mode 100644
index 000000000000..c41714dedbfb
--- /dev/null
+++ b/drivers/soc/qcom/qcom_rproc_minidump.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2015 Sony Mobile Communications Inc
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/remoteproc.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/string.h>
+#include <soc/qcom/qcom_minidump.h>
+
+#include "qcom_minidump_internal.h"
+
+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,
+ void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment,
+ void *dest, size_t offset, size_t size))
+{
+ 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 (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
+ name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
+ if (!name) {
+ iounmap(ptr);
+ return -ENOMEM;
+ }
+ da = le64_to_cpu(region.address);
+ size = le64_to_cpu(region.size);
+ rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
+ }
+ }
+
+ iounmap(ptr);
+ return 0;
+}
+
+void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
+ void (*rproc_dumpfn_t)(struct rproc *rproc,
+ struct rproc_dump_segment *segment, void *dest, size_t offset,
+ size_t size))
+{
+ 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) != MINIDUMP_SS_ENABLED ||
+ le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
+ dev_err(&rproc->dev, "Minidump not ready, skipping\n");
+ return;
+ }
+
+ ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
+ 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_rproc_minidump);
+
+MODULE_DESCRIPTION("Qualcomm remoteproc minidump(smem) helper module");
+MODULE_LICENSE("GPL");
diff --git a/include/soc/qcom/qcom_minidump.h b/include/soc/qcom/qcom_minidump.h
new file mode 100644
index 000000000000..cd87caef919d
--- /dev/null
+++ b/include/soc/qcom/qcom_minidump.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _QCOM_MINIDUMP_H_
+#define _QCOM_MINIDUMP_H_
+
+struct rproc;
+struct rproc_dump_segment;
+
+#if IS_ENABLED(CONFIG_QCOM_RPROC_MINIDUMP)
+void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
+ void (*rproc_dumpfn_t)(struct rproc *rproc,
+ struct rproc_dump_segment *segment, void *dest, size_t offset,
+ size_t size));
+#else
+static inline void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
+ void (*rproc_dumpfn_t)(struct rproc *rproc,
+ struct rproc_dump_segment *segment, void *dest, size_t offset,
+ size_t size)) { }
+#endif /* CONFIG_QCOM_RPROC_MINIDUMP */
+#endif /* _QCOM_MINIDUMP_H_ */
--
2.7.4
Now, as all the minidump specific data structure is moved to
minidump specific files and implementation wise qcom_rproc_minidump()
and qcom_minidump() exactly same and the name qcom_rproc_minidump
make more sense as it happen to collect the minidump for the
remoteproc processors. So, let's use qcom_rproc_minidump() and
we will be removing qcom_minidump() and minidump related stuff
from driver/remoteproc/qcom_common.c .
Signed-off-by: Mukesh Ojha <[email protected]>
---
Changes in v9:
- Change in patch order from its last version.
- Rebased it.
v8: https://lore.kernel.org/lkml/[email protected]/
v7: https://lore.kernel.org/lkml/[email protected]/
v6: https://lore.kernel.org/lkml/[email protected]/
v5: https://lore.kernel.org/lkml/[email protected]/
v4: https://lore.kernel.org/lkml/[email protected]/
drivers/remoteproc/Kconfig | 1 +
drivers/remoteproc/qcom_q6v5_pas.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 48845dc8fa85..cea960749e2c 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -166,6 +166,7 @@ config QCOM_PIL_INFO
config QCOM_RPROC_COMMON
tristate
+ select QCOM_RPROC_MINIDUMP
config QCOM_Q6V5_COMMON
tristate
diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 54d8005d40a3..b39f87dfd9c0 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -25,6 +25,7 @@
#include <linux/soc/qcom/mdt_loader.h>
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
+#include <soc/qcom/qcom_minidump.h>
#include "qcom_common.h"
#include "qcom_pil_info.h"
@@ -141,7 +142,7 @@ static void adsp_minidump(struct rproc *rproc)
if (rproc->dump_conf == RPROC_COREDUMP_DISABLED)
return;
- qcom_minidump(rproc, adsp->minidump_id, adsp_segment_dump);
+ qcom_rproc_minidump(rproc, adsp->minidump_id, adsp_segment_dump);
}
static int adsp_pds_enable(struct qcom_adsp *adsp, struct device **pds,
--
2.7.4
As minidump specific data structure and functions move under
config QCOM_RPROC_MINIDUMP, so remove minidump specific data
from driver/remoteproc/qcom_common.c .
Signed-off-by: Mukesh Ojha <[email protected]>
---
Changes in v9:
- Change in patch order.
- rebased it.
v8: https://lore.kernel.org/lkml/[email protected]/
v7: https://lore.kernel.org/lkml/[email protected]/
v6: https://lore.kernel.org/lkml/[email protected]/
v5: https://lore.kernel.org/lkml/[email protected]/
v4: https://lore.kernel.org/lkml/[email protected]/
drivers/remoteproc/qcom_common.c | 160 ---------------------------------------
1 file changed, 160 deletions(-)
diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c
index 03e5f5d533eb..085fd73fa23a 100644
--- a/drivers/remoteproc/qcom_common.c
+++ b/drivers/remoteproc/qcom_common.c
@@ -17,7 +17,6 @@
#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"
@@ -26,61 +25,6 @@
#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 MINIDUMP_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
-#define MINIDUMP_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
-#define MINIDUMP_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 - 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;
@@ -90,110 +34,6 @@ 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,
- void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment,
- void *dest, size_t offset, size_t size))
-{
- 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 (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
- name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
- if (!name) {
- iounmap(ptr);
- return -ENOMEM;
- }
- da = le64_to_cpu(region.address);
- size = le64_to_cpu(region.size);
- rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
- }
- }
-
- iounmap(ptr);
- return 0;
-}
-
-void qcom_minidump(struct rproc *rproc, unsigned int minidump_id,
- void (*rproc_dumpfn_t)(struct rproc *rproc,
- struct rproc_dump_segment *segment, void *dest, size_t offset,
- size_t size))
-{
- 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) != MINIDUMP_SS_ENABLED) {
- return rproc_coredump(rproc);
- }
-
- if (le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
- dev_err(&rproc->dev, "Minidump not ready, skipping\n");
- return;
- }
-
- /**
- * Clear out the dump segments populated by parse_fw before
- * re-populating them with minidump segments.
- */
- rproc_coredump_cleanup(rproc);
-
- ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
- 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);
--
2.7.4
Gentle ping..
-Mukesh
On 3/26/2024 7:43 PM, Mukesh Ojha wrote:
> Add qcom_rproc_minidump module in a preparation to remove
> minidump specific code from driver/remoteproc/qcom_common.c
> and provide needed exported API, this as well helps to
> abstract minidump specific data layout from qualcomm's
> remoteproc driver.
>
> It is just a copying of qcom_minidump() functionality from
> driver/remoteproc/qcom_common.c into a separate file under
> qcom_rproc_minidump().
>
> Signed-off-by: Mukesh Ojha <[email protected]>
> ---
> Changes in v9:
> - Added source file driver/remoteproc/qcom_common.c copyright
> to qcom_rproc_minidump.c
> - Dissociated it from minidump series as this can go separately
> and minidump can put it dependency for the data structure files.
>
> Nothing much changed in these three patches from previous version,
> However, giving the link of their older versions.
>
> v8: https://lore.kernel.org/lkml/[email protected]/
> v7: https://lore.kernel.org/lkml/[email protected]/
> v6: https://lore.kernel.org/lkml/[email protected]/
> v5: https://lore.kernel.org/lkml/[email protected]/
> v4: https://lore.kernel.org/lkml/[email protected]/
>
> drivers/soc/qcom/Kconfig | 10 +++
> drivers/soc/qcom/Makefile | 1 +
> drivers/soc/qcom/qcom_minidump_internal.h | 64 +++++++++++++++++
> drivers/soc/qcom/qcom_rproc_minidump.c | 115 ++++++++++++++++++++++++++++++
> include/soc/qcom/qcom_minidump.h | 23 ++++++
> 5 files changed, 213 insertions(+)
> create mode 100644 drivers/soc/qcom/qcom_minidump_internal.h
> create mode 100644 drivers/soc/qcom/qcom_rproc_minidump.c
> create mode 100644 include/soc/qcom/qcom_minidump.h
>
> diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
> index 5af33b0e3470..ed23e0275c22 100644
> --- a/drivers/soc/qcom/Kconfig
> +++ b/drivers/soc/qcom/Kconfig
> @@ -277,4 +277,14 @@ config QCOM_PBS
> This module provides the APIs to the client drivers that wants to send the
> PBS trigger event to the PBS RAM.
>
> +config QCOM_RPROC_MINIDUMP
> + tristate "QCOM Remoteproc Minidump Support"
> + depends on ARCH_QCOM || COMPILE_TEST
> + depends on QCOM_SMEM
> + help
> + Enablement of core Minidump feature is controlled from boot firmware
> + side, so if it is enabled from firmware, this config allow Linux to
> + query predefined Minidump segments associated with the remote processor
> + and check its validity and end up collecting the dump on remote processor
> + crash during its recovery.
> endmenu
> diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
> index ca0bece0dfff..44664589263d 100644
> --- a/drivers/soc/qcom/Makefile
> +++ b/drivers/soc/qcom/Makefile
> @@ -36,3 +36,4 @@ obj-$(CONFIG_QCOM_ICC_BWMON) += icc-bwmon.o
> qcom_ice-objs += ice.o
> obj-$(CONFIG_QCOM_INLINE_CRYPTO_ENGINE) += qcom_ice.o
> obj-$(CONFIG_QCOM_PBS) += qcom-pbs.o
> +obj-$(CONFIG_QCOM_RPROC_MINIDUMP) += qcom_rproc_minidump.o
> diff --git a/drivers/soc/qcom/qcom_minidump_internal.h b/drivers/soc/qcom/qcom_minidump_internal.h
> new file mode 100644
> index 000000000000..71709235b196
> --- /dev/null
> +++ b/drivers/soc/qcom/qcom_minidump_internal.h
> @@ -0,0 +1,64 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#ifndef _QCOM_MINIDUMP_INTERNAL_H_
> +#define _QCOM_MINIDUMP_INTERNAL_H_
> +
> +#define MAX_NUM_OF_SS 10
> +#define MAX_REGION_NAME_LENGTH 16
> +#define SBL_MINIDUMP_SMEM_ID 602
> +#define MINIDUMP_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
> +#define MINIDUMP_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
> +#define MINIDUMP_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 - 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];
> +};
> +
> +#endif /* _QCOM_MINIDUMP_INTERNAL_H_ */
> diff --git a/drivers/soc/qcom/qcom_rproc_minidump.c b/drivers/soc/qcom/qcom_rproc_minidump.c
> new file mode 100644
> index 000000000000..c41714dedbfb
> --- /dev/null
> +++ b/drivers/soc/qcom/qcom_rproc_minidump.c
> @@ -0,0 +1,115 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2016 Linaro Ltd
> + * Copyright (C) 2015 Sony Mobile Communications Inc
> + * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/remoteproc.h>
> +#include <linux/soc/qcom/smem.h>
> +#include <linux/string.h>
> +#include <soc/qcom/qcom_minidump.h>
> +
> +#include "qcom_minidump_internal.h"
> +
> +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,
> + void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment,
> + void *dest, size_t offset, size_t size))
> +{
> + 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 (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
> + name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
> + if (!name) {
> + iounmap(ptr);
> + return -ENOMEM;
> + }
> + da = le64_to_cpu(region.address);
> + size = le64_to_cpu(region.size);
> + rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
> + }
> + }
> +
> + iounmap(ptr);
> + return 0;
> +}
> +
> +void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
> + void (*rproc_dumpfn_t)(struct rproc *rproc,
> + struct rproc_dump_segment *segment, void *dest, size_t offset,
> + size_t size))
> +{
> + 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) != MINIDUMP_SS_ENABLED ||
> + le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
> + dev_err(&rproc->dev, "Minidump not ready, skipping\n");
> + return;
> + }
> +
> + ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
> + 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_rproc_minidump);
> +
> +MODULE_DESCRIPTION("Qualcomm remoteproc minidump(smem) helper module");
> +MODULE_LICENSE("GPL");
> diff --git a/include/soc/qcom/qcom_minidump.h b/include/soc/qcom/qcom_minidump.h
> new file mode 100644
> index 000000000000..cd87caef919d
> --- /dev/null
> +++ b/include/soc/qcom/qcom_minidump.h
> @@ -0,0 +1,23 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#ifndef _QCOM_MINIDUMP_H_
> +#define _QCOM_MINIDUMP_H_
> +
> +struct rproc;
> +struct rproc_dump_segment;
> +
> +#if IS_ENABLED(CONFIG_QCOM_RPROC_MINIDUMP)
> +void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
> + void (*rproc_dumpfn_t)(struct rproc *rproc,
> + struct rproc_dump_segment *segment, void *dest, size_t offset,
> + size_t size));
> +#else
> +static inline void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
> + void (*rproc_dumpfn_t)(struct rproc *rproc,
> + struct rproc_dump_segment *segment, void *dest, size_t offset,
> + size_t size)) { }
> +#endif /* CONFIG_QCOM_RPROC_MINIDUMP */
> +#endif /* _QCOM_MINIDUMP_H_ */
On Tue, Mar 26, 2024 at 07:43:12PM +0530, Mukesh Ojha wrote:
> Add qcom_rproc_minidump module in a preparation to remove
> minidump specific code from driver/remoteproc/qcom_common.c
> and provide needed exported API, this as well helps to
> abstract minidump specific data layout from qualcomm's
> remoteproc driver.
>
> It is just a copying of qcom_minidump() functionality from
> driver/remoteproc/qcom_common.c into a separate file under
> qcom_rproc_minidump().
>
I'd prefer to see this enter the git history as one patch, extracting
this logic from the remoteproc into its own driver - rather than as
presented here give a sense that it's a new thing added. (I'll take care
of the maintainer sync...)
I also would prefer for this to include a problem description,
documenting why this is done.
I've not compared patch 1 and 3, but I'd also like a statement in the
commit message telling if there are any changes, or if the functions are
cleanly moved from one place to another.
Regards,
Bjorn
> Signed-off-by: Mukesh Ojha <[email protected]>
> ---
> Changes in v9:
> - Added source file driver/remoteproc/qcom_common.c copyright
> to qcom_rproc_minidump.c
> - Dissociated it from minidump series as this can go separately
> and minidump can put it dependency for the data structure files.
>
> Nothing much changed in these three patches from previous version,
> However, giving the link of their older versions.
>
> v8: https://lore.kernel.org/lkml/[email protected]/
> v7: https://lore.kernel.org/lkml/[email protected]/
> v6: https://lore.kernel.org/lkml/[email protected]/
> v5: https://lore.kernel.org/lkml/[email protected]/
> v4: https://lore.kernel.org/lkml/[email protected]/
>
> drivers/soc/qcom/Kconfig | 10 +++
> drivers/soc/qcom/Makefile | 1 +
> drivers/soc/qcom/qcom_minidump_internal.h | 64 +++++++++++++++++
> drivers/soc/qcom/qcom_rproc_minidump.c | 115 ++++++++++++++++++++++++++++++
> include/soc/qcom/qcom_minidump.h | 23 ++++++
> 5 files changed, 213 insertions(+)
> create mode 100644 drivers/soc/qcom/qcom_minidump_internal.h
> create mode 100644 drivers/soc/qcom/qcom_rproc_minidump.c
> create mode 100644 include/soc/qcom/qcom_minidump.h
>
> diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
> index 5af33b0e3470..ed23e0275c22 100644
> --- a/drivers/soc/qcom/Kconfig
> +++ b/drivers/soc/qcom/Kconfig
> @@ -277,4 +277,14 @@ config QCOM_PBS
> This module provides the APIs to the client drivers that wants to send the
> PBS trigger event to the PBS RAM.
>
> +config QCOM_RPROC_MINIDUMP
> + tristate "QCOM Remoteproc Minidump Support"
> + depends on ARCH_QCOM || COMPILE_TEST
> + depends on QCOM_SMEM
> + help
> + Enablement of core Minidump feature is controlled from boot firmware
> + side, so if it is enabled from firmware, this config allow Linux to
> + query predefined Minidump segments associated with the remote processor
> + and check its validity and end up collecting the dump on remote processor
> + crash during its recovery.
> endmenu
> diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
> index ca0bece0dfff..44664589263d 100644
> --- a/drivers/soc/qcom/Makefile
> +++ b/drivers/soc/qcom/Makefile
> @@ -36,3 +36,4 @@ obj-$(CONFIG_QCOM_ICC_BWMON) += icc-bwmon.o
> qcom_ice-objs += ice.o
> obj-$(CONFIG_QCOM_INLINE_CRYPTO_ENGINE) += qcom_ice.o
> obj-$(CONFIG_QCOM_PBS) += qcom-pbs.o
> +obj-$(CONFIG_QCOM_RPROC_MINIDUMP) += qcom_rproc_minidump.o
> diff --git a/drivers/soc/qcom/qcom_minidump_internal.h b/drivers/soc/qcom/qcom_minidump_internal.h
> new file mode 100644
> index 000000000000..71709235b196
> --- /dev/null
> +++ b/drivers/soc/qcom/qcom_minidump_internal.h
> @@ -0,0 +1,64 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#ifndef _QCOM_MINIDUMP_INTERNAL_H_
> +#define _QCOM_MINIDUMP_INTERNAL_H_
> +
> +#define MAX_NUM_OF_SS 10
> +#define MAX_REGION_NAME_LENGTH 16
> +#define SBL_MINIDUMP_SMEM_ID 602
> +#define MINIDUMP_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
> +#define MINIDUMP_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
> +#define MINIDUMP_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 - 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];
> +};
> +
> +#endif /* _QCOM_MINIDUMP_INTERNAL_H_ */
> diff --git a/drivers/soc/qcom/qcom_rproc_minidump.c b/drivers/soc/qcom/qcom_rproc_minidump.c
> new file mode 100644
> index 000000000000..c41714dedbfb
> --- /dev/null
> +++ b/drivers/soc/qcom/qcom_rproc_minidump.c
> @@ -0,0 +1,115 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2016 Linaro Ltd
> + * Copyright (C) 2015 Sony Mobile Communications Inc
> + * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/remoteproc.h>
> +#include <linux/soc/qcom/smem.h>
> +#include <linux/string.h>
> +#include <soc/qcom/qcom_minidump.h>
> +
> +#include "qcom_minidump_internal.h"
> +
> +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,
> + void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment,
> + void *dest, size_t offset, size_t size))
> +{
> + 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 (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
> + name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
> + if (!name) {
> + iounmap(ptr);
> + return -ENOMEM;
> + }
> + da = le64_to_cpu(region.address);
> + size = le64_to_cpu(region.size);
> + rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
> + }
> + }
> +
> + iounmap(ptr);
> + return 0;
> +}
> +
> +void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
> + void (*rproc_dumpfn_t)(struct rproc *rproc,
> + struct rproc_dump_segment *segment, void *dest, size_t offset,
> + size_t size))
> +{
> + 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) != MINIDUMP_SS_ENABLED ||
> + le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
> + dev_err(&rproc->dev, "Minidump not ready, skipping\n");
> + return;
> + }
> +
> + ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
> + 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_rproc_minidump);
> +
> +MODULE_DESCRIPTION("Qualcomm remoteproc minidump(smem) helper module");
> +MODULE_LICENSE("GPL");
> diff --git a/include/soc/qcom/qcom_minidump.h b/include/soc/qcom/qcom_minidump.h
> new file mode 100644
> index 000000000000..cd87caef919d
> --- /dev/null
> +++ b/include/soc/qcom/qcom_minidump.h
> @@ -0,0 +1,23 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#ifndef _QCOM_MINIDUMP_H_
> +#define _QCOM_MINIDUMP_H_
> +
> +struct rproc;
> +struct rproc_dump_segment;
> +
> +#if IS_ENABLED(CONFIG_QCOM_RPROC_MINIDUMP)
> +void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
> + void (*rproc_dumpfn_t)(struct rproc *rproc,
> + struct rproc_dump_segment *segment, void *dest, size_t offset,
> + size_t size));
> +#else
> +static inline void qcom_rproc_minidump(struct rproc *rproc, unsigned int minidump_id,
> + void (*rproc_dumpfn_t)(struct rproc *rproc,
> + struct rproc_dump_segment *segment, void *dest, size_t offset,
> + size_t size)) { }
> +#endif /* CONFIG_QCOM_RPROC_MINIDUMP */
> +#endif /* _QCOM_MINIDUMP_H_ */
> --
> 2.7.4
>
On 4/30/2024 7:08 PM, Bjorn Andersson wrote:
> On Tue, Mar 26, 2024 at 07:43:12PM +0530, Mukesh Ojha wrote:
>> Add qcom_rproc_minidump module in a preparation to remove
>> minidump specific code from driver/remoteproc/qcom_common.c
>> and provide needed exported API, this as well helps to
>> abstract minidump specific data layout from qualcomm's
>> remoteproc driver.
>>
>> It is just a copying of qcom_minidump() functionality from
>> driver/remoteproc/qcom_common.c into a separate file under
>> qcom_rproc_minidump().
>>
>
> I'd prefer to see this enter the git history as one patch, extracting
> this logic from the remoteproc into its own driver - rather than as
> presented here give a sense that it's a new thing added. (I'll take care
> of the maintainer sync...)
>
> I also would prefer for this to include a problem description,
> documenting why this is done.
>
>
> I've not compared patch 1 and 3, but I'd also like a statement in the
> commit message telling if there are any changes, or if the functions are
> cleanly moved from one place to another.
Thanks for the review, addressed the comments here in v10.
https://lore.kernel.org/lkml/[email protected]/
-Mukesh