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Wysocki" , Mika Westerberg , Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Cc: Palmer Dabbelt , Paul Walmsley , Alexandre Ghiti , Len Brown , Sunil V L , Rahul Pathak , Leyfoon Tan , Atish Patra , Andrew Jones , Samuel Holland , Anup Patel , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel Subject: [PATCH v10 04/24] mailbox: Add common header for RPMI messages sent via mailbox Date: Mon, 18 Aug 2025 09:39:00 +0530 Message-ID: <20250818040920.272664-5-apatel@ventanamicro.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250818040920.272664-1-apatel@ventanamicro.com> References: <20250818040920.272664-1-apatel@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The RPMI based mailbox controller drivers and mailbox clients need to share defines related to RPMI messages over mailbox interface so add a common header for this purpose. Acked-by: Jassi Brar Co-developed-by: Rahul Pathak Signed-off-by: Rahul Pathak Signed-off-by: Anup Patel --- include/linux/mailbox/riscv-rpmi-message.h | 214 +++++++++++++++++++++ 1 file changed, 214 insertions(+) create mode 100644 include/linux/mailbox/riscv-rpmi-message.h diff --git a/include/linux/mailbox/riscv-rpmi-message.h b/include/linux/mai= lbox/riscv-rpmi-message.h new file mode 100644 index 000000000000..c3a98fc12c0a --- /dev/null +++ b/include/linux/mailbox/riscv-rpmi-message.h @@ -0,0 +1,214 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2025 Ventana Micro Systems Inc. */ + +#ifndef _LINUX_RISCV_RPMI_MESSAGE_H_ +#define _LINUX_RISCV_RPMI_MESSAGE_H_ + +#include +#include +#include +#include + +/* RPMI version encode/decode macros */ +#define RPMI_VER_MAJOR(__ver) upper_16_bits(__ver) +#define RPMI_VER_MINOR(__ver) lower_16_bits(__ver) +#define RPMI_MKVER(__maj, __min) (((u32)(__maj) << 16) | (u16)(__min)) + +/* RPMI message header */ +struct rpmi_message_header { + __le16 servicegroup_id; + u8 service_id; + u8 flags; + __le16 datalen; + __le16 token; +}; + +/* RPMI message */ +struct rpmi_message { + struct rpmi_message_header header; + u8 data[]; +}; + +/* RPMI notification event */ +struct rpmi_notification_event { + __le16 event_datalen; + u8 event_id; + u8 reserved; + u8 event_data[]; +}; + +/* RPMI error codes */ +enum rpmi_error_codes { + RPMI_SUCCESS =3D 0, + RPMI_ERR_FAILED =3D -1, + RPMI_ERR_NOTSUPP =3D -2, + RPMI_ERR_INVALID_PARAM =3D -3, + RPMI_ERR_DENIED =3D -4, + RPMI_ERR_INVALID_ADDR =3D -5, + RPMI_ERR_ALREADY =3D -6, + RPMI_ERR_EXTENSION =3D -7, + RPMI_ERR_HW_FAULT =3D -8, + RPMI_ERR_BUSY =3D -9, + RPMI_ERR_INVALID_STATE =3D -10, + RPMI_ERR_BAD_RANGE =3D -11, + RPMI_ERR_TIMEOUT =3D -12, + RPMI_ERR_IO =3D -13, + RPMI_ERR_NO_DATA =3D -14, + RPMI_ERR_RESERVED_START =3D -15, + RPMI_ERR_RESERVED_END =3D -127, + RPMI_ERR_VENDOR_START =3D -128, +}; + +static inline int rpmi_to_linux_error(int rpmi_error) +{ + switch (rpmi_error) { + case RPMI_SUCCESS: + return 0; + case RPMI_ERR_INVALID_PARAM: + case RPMI_ERR_BAD_RANGE: + case RPMI_ERR_INVALID_STATE: + return -EINVAL; + case RPMI_ERR_DENIED: + return -EPERM; + case RPMI_ERR_INVALID_ADDR: + case RPMI_ERR_HW_FAULT: + return -EFAULT; + case RPMI_ERR_ALREADY: + return -EALREADY; + case RPMI_ERR_BUSY: + return -EBUSY; + case RPMI_ERR_TIMEOUT: + return -ETIMEDOUT; + case RPMI_ERR_IO: + return -ECOMM; + case RPMI_ERR_FAILED: + case RPMI_ERR_NOTSUPP: + case RPMI_ERR_NO_DATA: + case RPMI_ERR_EXTENSION: + default: + return -EOPNOTSUPP; + } +} + +/* RPMI Linux mailbox attribute IDs */ +enum rpmi_mbox_attribute_id { + RPMI_MBOX_ATTR_SPEC_VERSION, + RPMI_MBOX_ATTR_MAX_MSG_DATA_SIZE, + RPMI_MBOX_ATTR_SERVICEGROUP_ID, + RPMI_MBOX_ATTR_SERVICEGROUP_VERSION, + RPMI_MBOX_ATTR_IMPL_ID, + RPMI_MBOX_ATTR_IMPL_VERSION, + RPMI_MBOX_ATTR_MAX_ID +}; + +/* RPMI Linux mailbox message types */ +enum rpmi_mbox_message_type { + RPMI_MBOX_MSG_TYPE_GET_ATTRIBUTE, + RPMI_MBOX_MSG_TYPE_SET_ATTRIBUTE, + RPMI_MBOX_MSG_TYPE_SEND_WITH_RESPONSE, + RPMI_MBOX_MSG_TYPE_SEND_WITHOUT_RESPONSE, + RPMI_MBOX_MSG_TYPE_NOTIFICATION_EVENT, + RPMI_MBOX_MSG_MAX_TYPE +}; + +/* RPMI Linux mailbox message instance */ +struct rpmi_mbox_message { + enum rpmi_mbox_message_type type; + union { + struct { + enum rpmi_mbox_attribute_id id; + u32 value; + } attr; + + struct { + u32 service_id; + void *request; + unsigned long request_len; + void *response; + unsigned long max_response_len; + unsigned long out_response_len; + } data; + + struct { + u16 event_datalen; + u8 event_id; + u8 *event_data; + } notif; + }; + int error; +}; + +/* RPMI Linux mailbox message helper routines */ +static inline void rpmi_mbox_init_get_attribute(struct rpmi_mbox_message *= msg, + enum rpmi_mbox_attribute_id id) +{ + msg->type =3D RPMI_MBOX_MSG_TYPE_GET_ATTRIBUTE; + msg->attr.id =3D id; + msg->attr.value =3D 0; + msg->error =3D 0; +} + +static inline void rpmi_mbox_init_set_attribute(struct rpmi_mbox_message *= msg, + enum rpmi_mbox_attribute_id id, + u32 value) +{ + msg->type =3D RPMI_MBOX_MSG_TYPE_SET_ATTRIBUTE; + msg->attr.id =3D id; + msg->attr.value =3D value; + msg->error =3D 0; +} + +static inline void rpmi_mbox_init_send_with_response(struct rpmi_mbox_mess= age *msg, + u32 service_id, + void *request, + unsigned long request_len, + void *response, + unsigned long max_response_len) +{ + msg->type =3D RPMI_MBOX_MSG_TYPE_SEND_WITH_RESPONSE; + msg->data.service_id =3D service_id; + msg->data.request =3D request; + msg->data.request_len =3D request_len; + msg->data.response =3D response; + msg->data.max_response_len =3D max_response_len; + msg->data.out_response_len =3D 0; + msg->error =3D 0; +} + +static inline void rpmi_mbox_init_send_without_response(struct rpmi_mbox_m= essage *msg, + u32 service_id, + void *request, + unsigned long request_len) +{ + msg->type =3D RPMI_MBOX_MSG_TYPE_SEND_WITHOUT_RESPONSE; + msg->data.service_id =3D service_id; + msg->data.request =3D request; + msg->data.request_len =3D request_len; + msg->data.response =3D NULL; + msg->data.max_response_len =3D 0; + msg->data.out_response_len =3D 0; + msg->error =3D 0; +} + +static inline void *rpmi_mbox_get_msg_response(struct rpmi_mbox_message *m= sg) +{ + return msg ? msg->data.response : NULL; +} + +static inline int rpmi_mbox_send_message(struct mbox_chan *chan, + struct rpmi_mbox_message *msg) +{ + int ret; + + /* Send message for the underlying mailbox channel */ + ret =3D mbox_send_message(chan, msg); + if (ret < 0) + return ret; + + /* Explicitly signal txdone for mailbox channel */ + ret =3D msg->error; + mbox_client_txdone(chan, ret); + return ret; +} + +#endif /* _LINUX_RISCV_RPMI_MESSAGE_H_ */ --=20 2.43.0