From 09e7b002ff67342364af735f7bbf13b0be1fcdfc Mon Sep 17 00:00:00 2001 From: M Chetan Kumar Date: Sun, 19 Sep 2021 22:57:27 +0530 Subject: net: wwan: iosm: coredump collection support Implements protocol for coredump collection. Signed-off-by: M Chetan Kumar Signed-off-by: David S. Miller --- 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 (limited to 'drivers') 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_ */ -- cgit