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Sun, 21 Jan 2024 10:17:57 +0000 From: "Peng Fan (OSS)" Date: Sun, 21 Jan 2024 18:21:50 +0800 Subject: [PATCH v3 1/6] firmware: arm_scmi: introduce helper get_max_msg_size Message-Id: <20240121-pinctrl-scmi-v3-1-8d94ba79dca8@nxp.com> References: <20240121-pinctrl-scmi-v3-0-8d94ba79dca8@nxp.com> In-Reply-To: <20240121-pinctrl-scmi-v3-0-8d94ba79dca8@nxp.com> To: Sudeep Holla , Cristian Marussi , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Oleksii Moisieiev , Linus Walleij , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, AKASHI Takahiro , Peng Fan X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1705832540; l=2660; i=peng.fan@nxp.com; s=20230812; h=from:subject:message-id; bh=woqhTHJgcBsnzMOI1imkT0MV1gtJZhQATiD3eryt0aA=; b=44Bqa0Gh/2j2bCArW6t+6hWOq7O44sZiawis/gzEXzu9KM0r8eM84Onj1pGmGeSbKNn9O32Re 4vIwpfWDDQBDZQROadB4ztVaXFt5gs0IYTeIrx4iFNsfuD115GKyJ2f X-Developer-Key: i=peng.fan@nxp.com; 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So introduce the helper get_max_msg_size. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan --- drivers/firmware/arm_scmi/driver.c | 15 +++++++++++++++ drivers/firmware/arm_scmi/protocols.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 3ea64b22cf0d..a12afc254afa 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1481,6 +1481,20 @@ static int scmi_common_extended_name_get(const struct scmi_protocol_handle *ph, return ret; } +/** + * scmi_common_get_max_msg_size - Get maximum message size + * @ph: A protocol handle reference. + * + * Return: Maximum message size for the current protocol. + */ +static int scmi_common_get_max_msg_size(const struct scmi_protocol_handle *ph) +{ + const struct scmi_protocol_instance *pi = ph_to_pi(ph); + struct scmi_info *info = handle_to_scmi_info(pi->handle); + + return info->desc->max_msg_size; +} + /** * struct scmi_iterator - Iterator descriptor * @msg: A reference to the message TX buffer; filled by @prepare_message with @@ -1756,6 +1770,7 @@ static void scmi_common_fastchannel_db_ring(struct scmi_fc_db_info *db) static const struct scmi_proto_helpers_ops helpers_ops = { .extended_name_get = scmi_common_extended_name_get, + .get_max_msg_size = scmi_common_get_max_msg_size, .iter_response_init = scmi_iterator_init, .iter_response_run = scmi_iterator_run, .fastchannel_init = scmi_common_fastchannel_init, diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h index e683c26f24eb..b5c65f26207b 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -254,6 +254,7 @@ struct scmi_fc_info { * @fastchannel_init: A common helper used to initialize FC descriptors by * gathering FC descriptions from the SCMI platform server. * @fastchannel_db_ring: A common helper to ring a FC doorbell. + * @get_max_msg_size: A common helper to get the maximum message size. */ struct scmi_proto_helpers_ops { int (*extended_name_get)(const struct scmi_protocol_handle *ph, @@ -270,6 +271,7 @@ struct scmi_proto_helpers_ops { void __iomem **p_addr, struct scmi_fc_db_info **p_db); void (*fastchannel_db_ring)(struct scmi_fc_db_info *db); + int (*get_max_msg_size)(const struct scmi_protocol_handle *ph); }; /**