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Message-Id: <20200412112405.24116-3-wenhu.wang@vivo.com>
Date: Sun, 12 Apr 2020 04:24:04 -0700
From: Wang Wenhu <wenhu.wang@...o.com>
To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Cc: rdunlap@...radead.org, kernel@...o.com,
Wang Wenhu <wenhu.wang@...o.com>
Subject: [PATCH v2,2/3] driver: rpmon: qmi message version 01
Implements a RPMON_QMI message set for connection checking 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, and if so, RPMON_QMI_MAG_V2 would
be introduced as a new module, in parallel with RPMON_QMI_MAG_V1.
Signed-off-by: Wang Wenhu <wenhu.wang@...o.com>
---
Changes since v1:
- Addressed review comments from Randy
---
drivers/rpmon/Kconfig | 13 ++
drivers/rpmon/Makefile | 1 +
drivers/rpmon/rpmon_qmi.h | 77 ++++++++++
drivers/rpmon/rpmon_qmi_msg_v1.c | 242 +++++++++++++++++++++++++++++++
4 files changed, 333 insertions(+)
create mode 100644 drivers/rpmon/rpmon_qmi.h
create mode 100644 drivers/rpmon/rpmon_qmi_msg_v1.c
diff --git a/drivers/rpmon/Kconfig b/drivers/rpmon/Kconfig
index ad0e6d6561ca..0b80236ad186 100644
--- a/drivers/rpmon/Kconfig
+++ b/drivers/rpmon/Kconfig
@@ -23,4 +23,17 @@ config RPMON
Currently RPMON_QMI is available which uses QMI infrastructures
on Qualcomm SoC Platforms.
+config RPMON_QMI_MSG_V1
+ tristate "RPMON QMI Message Version 1.0"
+ depends on RPMON
+ depends on QCOM_QMI_HELPERS
+ help
+ 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.
+
endmenu
diff --git a/drivers/rpmon/Makefile b/drivers/rpmon/Makefile
index b0f0ec4ecc30..25f468a73a20 100644
--- a/drivers/rpmon/Makefile
+++ b/drivers/rpmon/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_RPMON) += rpmon.o
+obj-$(CONFIG_RPMON_QMI_MSG_V1) += rpmon_qmi_msg_v1.o
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;
+};
+
+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..3fe6d6a4cf31
--- /dev/null
+++ b/drivers/rpmon/rpmon_qmi_msg_v1.c
@@ -0,0 +1,242 @@
+// 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 framework
+ * for modern SoCs that typically have heterogeneous remote processor
+ * devices in asymmetric multiprocessing configurations. It is
+ * implemented with chardev and sysfs class, which act as interfaces
+ * to communicate with user level. It supports different communication
+ * interfaces added modularly to communicate with remote processors.
+ * Currently QMI implementation, named RPMON_QMI, is available.
+ *
+ * RPMON could be used to detect the stabilities of remote processors,
+ * collect any kinds of information you are interested in, take
+ * actions like connection status check, and so on. Enhancements
+ * can be made upon current implementation.
+ *
+ * RPMON_QMI_MSG_V1 is specifically implemented as a set of messages
+ * for RPMON_QMI to support connection checking of remote processors.
+ */
+
+#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,
+ .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),
+ .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 response 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 response failed", ret);
+
+ 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 <wenhu.wang@...o.com>");
+MODULE_LICENSE("GPL v2");
--
2.17.1
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