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Date: Sun, 19 Sep 2021 22:57:27 +0530
From: M Chetan Kumar <m.chetan.kumar@...ux.intel.com>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net,
ryazanov.s.a@...il.com, loic.poulain@...aro.org,
krishna.c.sudi@...el.com, m.chetan.kumar@...el.com,
linuxwwan@...el.com
Subject: [PATCH V2 net-next 3/6] net: wwan: iosm: coredump collection support
Implements protocol for coredump collection.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@...ux.intel.com>
---
v2: no change.
---
drivers/net/wwan/iosm/iosm_ipc_coredump.c | 110 ++++++++++++++++++++++
drivers/net/wwan/iosm/iosm_ipc_coredump.h | 75 +++++++++++++++
2 files changed, 185 insertions(+)
create mode 100644 drivers/net/wwan/iosm/iosm_ipc_coredump.c
create mode 100644 drivers/net/wwan/iosm/iosm_ipc_coredump.h
diff --git a/drivers/net/wwan/iosm/iosm_ipc_coredump.c b/drivers/net/wwan/iosm/iosm_ipc_coredump.c
new file mode 100644
index 000000000000..fba3c3454e80
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_coredump.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#include "iosm_ipc_coredump.h"
+
+/* Collect coredump data from modem */
+int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,
+ u32 region_size)
+{
+ int ret, bytes_to_read, bytes_read = 0, i = 0;
+ s32 remaining;
+ u8 *data_ptr;
+
+ data_ptr = vmalloc(region_size);
+ if (!data_ptr)
+ return -ENOMEM;
+
+ remaining = devlink->cd_file_info[entry].actual_size;
+ ret = ipc_devlink_send_cmd(devlink, rpsi_cmd_coredump_get, entry);
+ if (ret) {
+ dev_err(devlink->dev, "Send coredump_get cmd failed");
+ goto get_cd_fail;
+ }
+ while (remaining > 0) {
+ bytes_to_read = min(remaining, MAX_DATA_SIZE);
+ bytes_read = 0;
+ ret = ipc_imem_sys_devlink_read(devlink, data_ptr + i,
+ bytes_to_read, &bytes_read);
+ if (ret) {
+ dev_err(devlink->dev, "CD data read failed");
+ goto get_cd_fail;
+ }
+ remaining -= bytes_read;
+ i += bytes_read;
+ }
+
+ *data = data_ptr;
+
+ return ret;
+get_cd_fail:
+ vfree(data_ptr);
+ return ret;
+}
+
+/* Get coredump list to be collected from modem */
+int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd)
+{
+ u32 byte_read, num_entries, file_size;
+ struct iosm_cd_table *cd_table;
+ u8 size[MAX_SIZE_LEN], i;
+ char *filename;
+ int ret = 0;
+
+ cd_table = kzalloc(MAX_CD_LIST_SIZE, GFP_KERNEL);
+ if (!cd_table) {
+ ret = -ENOMEM;
+ goto cd_init_fail;
+ }
+
+ ret = ipc_devlink_send_cmd(devlink, cmd, MAX_CD_LIST_SIZE);
+ if (ret) {
+ dev_err(devlink->dev, "rpsi_cmd_coredump_start failed");
+ goto cd_init_fail;
+ }
+
+ ret = ipc_imem_sys_devlink_read(devlink, (u8 *)cd_table,
+ MAX_CD_LIST_SIZE, &byte_read);
+ if (ret) {
+ dev_err(devlink->dev, "Coredump data is invalid");
+ goto cd_init_fail;
+ }
+
+ if (byte_read != MAX_CD_LIST_SIZE)
+ goto cd_init_fail;
+
+ if (cmd == rpsi_cmd_coredump_start) {
+ num_entries = le32_to_cpu(cd_table->list.num_entries);
+ if (num_entries == 0 || num_entries > IOSM_NOF_CD_REGION) {
+ ret = -EINVAL;
+ goto cd_init_fail;
+ }
+
+ for (i = 0; i < num_entries; i++) {
+ file_size = le32_to_cpu(cd_table->list.entry[i].size);
+ filename = cd_table->list.entry[i].filename;
+
+ if (file_size > devlink->cd_file_info[i].default_size) {
+ ret = -EINVAL;
+ goto cd_init_fail;
+ }
+
+ devlink->cd_file_info[i].actual_size = file_size;
+ dev_dbg(devlink->dev, "file: %s actual size %d",
+ filename, file_size);
+ devlink_flash_update_status_notify(devlink->devlink_ctx,
+ filename,
+ "FILENAME", 0, 0);
+ snprintf(size, sizeof(size), "%d", file_size);
+ devlink_flash_update_status_notify(devlink->devlink_ctx,
+ size, "FILE SIZE",
+ 0, 0);
+ }
+ }
+
+cd_init_fail:
+ kfree(cd_table);
+ return ret;
+}
diff --git a/drivers/net/wwan/iosm/iosm_ipc_coredump.h b/drivers/net/wwan/iosm/iosm_ipc_coredump.h
new file mode 100644
index 000000000000..d5028153c8d1
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_coredump.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#ifndef _IOSM_IPC_COREDUMP_H_
+#define _IOSM_IPC_COREDUMP_H_
+
+#include "iosm_ipc_devlink.h"
+
+/* Max number of bytes to receive for Coredump list structure */
+#define MAX_CD_LIST_SIZE 0x1000
+
+/* Max buffer allocated to receive coredump data */
+#define MAX_DATA_SIZE 0x00010000
+
+/* Max number of file entries */
+#define MAX_NOF_ENTRY 256
+
+/* Max length */
+#define MAX_SIZE_LEN 32
+
+/**
+ * struct iosm_cd_list_entry - Structure to hold coredump file info.
+ * @size: Number of bytes for the entry
+ * @filename: Coredump filename to be generated on host
+ */
+struct iosm_cd_list_entry {
+ __le32 size;
+ char filename[IOSM_MAX_FILENAME_LEN];
+} __packed;
+
+/**
+ * struct iosm_cd_list - Structure to hold list of coredump files
+ * to be collected.
+ * @num_entries: Number of entries to be received
+ * @entry: Contains File info
+ */
+struct iosm_cd_list {
+ __le32 num_entries;
+ struct iosm_cd_list_entry entry[MAX_NOF_ENTRY];
+} __packed;
+
+/**
+ * struct iosm_cd_table - Common Coredump table
+ * @version: Version of coredump structure
+ * @list: Coredump list structure
+ */
+struct iosm_cd_table {
+ __le32 version;
+ struct iosm_cd_list list;
+} __packed;
+
+/**
+ * ipc_coredump_collect - To collect coredump
+ * @devlink: Pointer to devlink instance.
+ * @data: Pointer to snapshot
+ * @entry: ID of requested snapshot
+ * @region_size: Region size
+ *
+ * Returns: 0 on success, error on failure
+ */
+int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,
+ u32 region_size);
+
+/**
+ * ipc_coredump_get_list - Get coredump list
+ * @devlink: Pointer to devlink instance.
+ * @cmd: RPSI command to be sent
+ *
+ * Returns: 0 on success, error on failure
+ */
+int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd);
+
+#endif /* _IOSM_IPC_COREDUMP_H_ */
--
2.25.1
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