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Date: Sat, 11 Apr 2020 12:07:11 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: Wang Wenhu <wenhu.wang@...o.com>, gregkh@...uxfoundation.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] driver: rpmon: qmi message version 01
Hi--
On 4/11/20 2:53 AM, Wang Wenhu wrote:
> Implements a RPMON_QMI message set for a certain rpmon service.
> RPMON_QMI defines its message types modularly. Each rpmon service
> binds to a message set and introduced as a module. This version 1.0
> message set could be used for connection checking of remote processors.
>
> RPMON_QMI messages depend on QCOM_QMI_HELPERS and should be updated
> together with QMI related modules.
>
> Signed-off-by: Wang Wenhu <wenhu.wang@...o.com>
> ---
> drivers/rpmon/Kconfig | 13 ++
> drivers/rpmon/Makefile | 1 +
> drivers/rpmon/rpmon_qmi.h | 77 ++++++++++
> drivers/rpmon/rpmon_qmi_msg_v1.c | 240 +++++++++++++++++++++++++++++++
> 4 files changed, 331 insertions(+)
> create mode 100644 drivers/rpmon/rpmon_qmi.h
> create mode 100644 drivers/rpmon/rpmon_qmi_msg_v1.c
>
> diff --git a/drivers/rpmon/rpmon_qmi.h b/drivers/rpmon/rpmon_qmi.h
> new file mode 100644
> index 000000000000..f6e7cfc97a3f
> --- /dev/null
> +++ b/drivers/rpmon/rpmon_qmi.h
> @@ -0,0 +1,77 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2020 Vivo Communication Technology Co. Ltd.
> + * Copyright (C) 2020 Wang Wenhu <wenhu.wang@...o.com>
> + * All rights reserved.
> + */
> +
> +#ifndef RPMON_QMI_INTERFACE_H
> +#define RPMON_QMI_INTERFACE_H
> +
> +#define RP_NAME_LEN 255
> +#define RPQMI_BUF_SIZE 4096
> +#define QMI_TLV_TL_SIZE 3
> +
> +enum rpmon_exec_result {
> + RPMON_EXEC_SUCCESS = 0,
> + RPMON_EXEC_FAILURE = 1,
> +};
> +
> +struct rpmon_register_req {
> + uint8_t name_valid;
> + char name[RP_NAME_LEN + 1];
> + uint8_t timeout_valid;
> + u32 timeout;
> +};
Is this struct packed or padded?
Is it shared with/used by other drivers?
> +
> +struct rpmon_conn_indication {
> + char placeholder;
> +};
> +
> +struct rpmon_conn_check_resp {
> + uint8_t result_valid;
> + struct qmi_response_type_v01 result;
> +};
> +
> +struct rpmon_response {
> + struct qmi_response_type_v01 resp;
> +};
> +
> +struct rpmon_qmi_device {
> + struct list_head list;
> + struct sockaddr_qrtr addr;
> + u32 timeout;
> + u32 flag;
> + struct ratelimit_state ratelimit;
> +
> + atomic_t checks;
> + atomic_t reports;
> +
> + struct rpmon_info *info;
> + struct rpmon_qmi *rqmi;
> +};
> +
> +struct rpmon_qmi {
> + struct rpmon_info *info;
> + struct qmi_handle qmi;
> + struct qmi_service *svc;
> + struct qmi_ops *ops;
> + struct qmi_msg_handler *handlers;
> + int (*sendmsg)(const struct rpmon_qmi_device *rdev,
> + const void *data,
> + u32 len);
> +};
> +
> +/* rpqmi message types currently supported. */
> +enum rpmon_qmi_msg_type {
> + RPQMI_MSG_REGISTER = 0,
> + RPQMI_MSG_CONNCHK_RESP,
> + RPQMI_MSG_MAX,
> +};
> +
> +int rpmon_qmi_handle_init(struct rpmon_qmi *rqmi,
> + void (*cb)(enum rpmon_qmi_msg_type type,
> + struct sockaddr_qrtr *sq,
> + const void *msg));
> +
> +#endif /* RPMON_QMI_INTERFACE_H */
> diff --git a/drivers/rpmon/rpmon_qmi_msg_v1.c b/drivers/rpmon/rpmon_qmi_msg_v1.c
> new file mode 100644
> index 000000000000..10d38d8133b0
> --- /dev/null
> +++ b/drivers/rpmon/rpmon_qmi_msg_v1.c
> @@ -0,0 +1,240 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 Vivo Communication Technology Co. Ltd.
> + * Copyright (C) 2020 Wang Wenhu <wenhu.wang@...o.com>
> + * All rights reserved.
> + *
> + * RPMON An implementation of remote processor monitor freamwork
typo: framework {in all 3 source files}
> + * for platforms that multi-processors exists. RPMON is implemented
but that sentence is confusing at best.
> + * with chardev and sysfs class as interfaces to communicate with
> + * the user level. It supports different communication interfaces
> + * added modularly with remote processors. Currently QMI implementation
> + * is available, and this file implements the message type v1.
> + *
> + * RPMON could be used to detect the stabilities of remote processors,
> + * collect any kinds of information you are interested with, take
interested in, take
> + * actions like connection status check, and so on. Enhancements can
> + * be made upon current implementation.
> + */
> +
> +#include <linux/soc/qcom/qmi.h>
> +#include <linux/rpmon.h>
> +#include "rpmon_qmi.h"
> +
> +#define RPMON_SVC_ID_V01 0x3c
> +#define RPMON_SVC_VER_V01 0x01
> +#define RPMON_SVC_INS_V01 0x00
> +
> +#define RPMON_CONN_REQ_MSG_ID_VO1 0x20
> +#define RPMON_CONN_RESP_MSG_ID_VO1 0x20
> +#define RPMON_CONN_IND_MSG_ID_V01 0x21
> +#define RPMON_EXEC_COMP_REQ_MSG_ID_V01 0x22
> +#define RPMON_EXEC_COMP_RESP_MSG_ID_V01 0x22
> +
> +static struct qmi_elem_info register_req_v01_ei[] = {
> + {
> + .data_type = QMI_OPT_FLAG,
> + .elem_len = 1,
> + .elem_size = sizeof(uint8_t),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x10,
Can you use an enum or #define value for the tlv_type magic numbers?
(multiple places)
> + .offset = offsetof(struct rpmon_register_req,
> + name_valid),
> + },
> + {
> + .data_type = QMI_STRING,
> + .elem_len = RP_NAME_LEN,
> + .elem_size = sizeof(char),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x10,
> + .offset = offsetof(struct rpmon_register_req,
> + name),
> + },
> + {
> + .data_type = QMI_OPT_FLAG,
> + .elem_len = 1,
> + .elem_size = sizeof(uint8_t),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x11,
> + .offset = offsetof(struct rpmon_register_req,
> + timeout_valid),
> + },
> + {
> + .data_type = QMI_UNSIGNED_4_BYTE,
> + .elem_len = 1,
> + .elem_size = sizeof(u32),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x11,
> + .offset = offsetof(struct rpmon_register_req,
> + timeout),
> + },
> + {
> + .data_type = QMI_EOTI,
> + .array_type = NO_ARRAY,
> + .tlv_type = QMI_COMMON_TLV_TYPE,
> + },
> +};
> +
> +static struct qmi_elem_info conn_check_resp_v01_ei[] = {
> + {
> + .data_type = QMI_OPT_FLAG,
> + .elem_len = 1,
> + .elem_size = sizeof(uint8_t),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x10,
> + .offset = offsetof(struct rpmon_conn_check_resp,
> + result_valid),
> + },
> + {
> + .data_type = QMI_SIGNED_4_BYTE_ENUM,
> + .elem_len = 1,
> + .elem_size = sizeof(enum rpmon_exec_result),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x10,
> + .offset = offsetof(struct rpmon_conn_check_resp,
> + result),
> + },
> + {
> + .data_type = QMI_EOTI,
> + .array_type = NO_ARRAY,
> + .tlv_type = QMI_COMMON_TLV_TYPE,
> + },
> +};
> +
> +static struct qmi_elem_info conn_indication_v01_ei[] = {
> + {
> + .data_type = QMI_EOTI,
> + .array_type = NO_ARRAY,
> + .tlv_type = QMI_COMMON_TLV_TYPE,
> + },
> +};
> +
> +static struct qmi_elem_info response_v01_ei[] = {
> + {
> + .data_type = QMI_STRUCT,
> + .elem_len = 1,
> + .elem_size = sizeof(struct qmi_response_type_v01),
> + .array_type = NO_ARRAY,
> + .tlv_type = 0x02,
> + .offset = offsetof(
> + struct rpmon_response,
> + resp),
multiple lines not needed above.
> + .ei_array = qmi_response_type_v01_ei,
> + },
> + {
> + .data_type = QMI_EOTI,
> + .array_type = NO_ARRAY,
> + .tlv_type = QMI_COMMON_TLV_TYPE,
> + },
> +};
> +
> +static void (*msg_callback)(enum rpmon_qmi_msg_type type,
> + struct sockaddr_qrtr *sq,
> + const void *msg);
> +
> +static int rpmon_qmi_sendmsg_v1(const struct rpmon_qmi_device *rdev,
> + const void *data,
> + u32 len)
> +{
> + int ret;
> + struct sockaddr_qrtr sq;
> +
> + memcpy(&sq, &rdev->addr, sizeof(sq));
> +
> + ret = qmi_send_indication(&rdev->rqmi->qmi, &sq,
> + RPMON_CONN_IND_MSG_ID_V01,
> + QMI_TLV_TL_SIZE,
> + conn_indication_v01_ei, NULL);
> + if (ret < 0)
> + pr_err("Error %d send indication failed", ret);
> +
> + return ret;
> +}
> +
> +static void rpmon_qmi_recv_register_req_v1(struct qmi_handle *qmi,
> + struct sockaddr_qrtr *sq,
> + struct qmi_txn *txn,
> + const void *msg)
> +{
> + struct rpmon_response resp;
> + int ret;
> +
> + resp.resp.result = QMI_RESULT_SUCCESS_V01;
> + resp.resp.error = QMI_ERR_NONE_V01;
> + ret = qmi_send_response(qmi, sq, txn,
> + RPMON_CONN_RESP_MSG_ID_VO1,
> + sizeof(resp.resp) + QMI_TLV_TL_SIZE * 2,
> + response_v01_ei,
> + &resp.resp);
> + if (ret < 0)
> + pr_err("Error %d send respons failed", ret);
> +
> + if (msg_callback)
> + msg_callback(RPQMI_MSG_REGISTER, sq, msg);
> +}
> +
> +void rpmon_qmi_recv_conn_check_resp_v1(struct qmi_handle *qmi,
> + struct sockaddr_qrtr *sq,
> + struct qmi_txn *txn,
> + const void *msg)
> +{
> + struct rpmon_response resp;
> + int ret;
> +
> + resp.resp.result = QMI_RESULT_SUCCESS_V01;
> + resp.resp.error = QMI_ERR_NONE_V01;
> + ret = qmi_send_response(qmi, sq, txn,
> + RPMON_EXEC_COMP_REQ_MSG_ID_V01,
> + sizeof(resp.resp) + QMI_TLV_TL_SIZE * 2,
> + response_v01_ei,
> + &resp.resp);
> + if (ret < 0)
> + pr_err("Error %d send respons failed", ret);
response
> +
> + if (msg_callback)
> + msg_callback(RPQMI_MSG_CONNCHK_RESP, sq, msg);
> +}
> +
> +static struct qmi_msg_handler rpmon_qmi_msg_handlers_v01[] = {
> + {
> + .type = QMI_REQUEST,
> + .msg_id = RPMON_CONN_REQ_MSG_ID_VO1,
> + .ei = register_req_v01_ei,
> + .decoded_size = sizeof(struct rpmon_register_req),
> + .fn = rpmon_qmi_recv_register_req_v1,
> + },
> + {
> + .type = QMI_REQUEST,
> + .msg_id = RPMON_EXEC_COMP_REQ_MSG_ID_V01,
> + .ei = conn_check_resp_v01_ei,
> + .decoded_size = sizeof(struct rpmon_conn_check_resp),
> + .fn = rpmon_qmi_recv_conn_check_resp_v1,
> + },
> +};
> +
> +static struct qmi_service rpmon_qmi_svc = {
> + .service = RPMON_SVC_ID_V01,
> + .version = RPMON_SVC_VER_V01,
> + .instance = RPMON_SVC_INS_V01,
> +};
> +
> +int rpmon_qmi_handle_init(struct rpmon_qmi *rqmi,
> + void (*cb)(enum rpmon_qmi_msg_type type,
> + struct sockaddr_qrtr *sq,
> + const void *msg))
> +{
> + rqmi->svc = &rpmon_qmi_svc;
> + rqmi->handlers = rpmon_qmi_msg_handlers_v01;
> + rqmi->sendmsg = rpmon_qmi_sendmsg_v1;
> +
> + if (cb)
> + msg_callback = cb;
> + else
> + return -EINVAL;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(rpmon_qmi_handle_init);
> +
> +MODULE_AUTHOR("Wang Wenhu");
Please include email address in the string above.
About 3/4 of all uses of MODULE_AUTHOR() do so.
> +MODULE_LICENSE("GPL v2");
>
thanks.
--
~Randy
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