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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2020-01-31 08:28:12 +0300 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2020-02-10 14:50:47 +0300 |
| commit | c4eb83660aef549a6a50965ec5f0af9c8306d2e9 (patch) | |
| tree | 8fb4aa6c5f6e6270c6386494dd8712f388b9df5f /drivers/firmware/arm_scmi/common.h | |
| parent | 71af05a7d0eb63fa5a6b64f296a5f2c8d84d6a9e (diff) | |
| download | linux-c4eb83660aef549a6a50965ec5f0af9c8306d2e9.tar.xz | |
firmware: arm_scmi: Move macros and helpers to common.h
Move message header specific macros and helper routines to common.h as
they will be used outside of driver.c in a later commit.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/6615db480370719b0a0241447a5f3feb8eea421f.1580448239.git.viresh.kumar@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/common.h')
| -rw-r--r-- | drivers/firmware/arm_scmi/common.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 227934871929..934b5a23f10b 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -47,6 +47,19 @@ struct scmi_msg_resp_prot_version { __le16 major_version; }; +#define MSG_ID_MASK GENMASK(7, 0) +#define MSG_XTRACT_ID(hdr) FIELD_GET(MSG_ID_MASK, (hdr)) +#define MSG_TYPE_MASK GENMASK(9, 8) +#define MSG_XTRACT_TYPE(hdr) FIELD_GET(MSG_TYPE_MASK, (hdr)) +#define MSG_TYPE_COMMAND 0 +#define MSG_TYPE_DELAYED_RESP 2 +#define MSG_TYPE_NOTIFICATION 3 +#define MSG_PROTOCOL_ID_MASK GENMASK(17, 10) +#define MSG_XTRACT_PROT_ID(hdr) FIELD_GET(MSG_PROTOCOL_ID_MASK, (hdr)) +#define MSG_TOKEN_ID_MASK GENMASK(27, 18) +#define MSG_XTRACT_TOKEN(hdr) FIELD_GET(MSG_TOKEN_ID_MASK, (hdr)) +#define MSG_TOKEN_MAX (MSG_XTRACT_TOKEN(MSG_TOKEN_ID_MASK) + 1) + /** * struct scmi_msg_hdr - Message(Tx/Rx) header * @@ -68,6 +81,33 @@ struct scmi_msg_hdr { }; /** + * pack_scmi_header() - packs and returns 32-bit header + * + * @hdr: pointer to header containing all the information on message id, + * protocol id and sequence id. + * + * Return: 32-bit packed message header to be sent to the platform. + */ +static inline u32 pack_scmi_header(struct scmi_msg_hdr *hdr) +{ + return FIELD_PREP(MSG_ID_MASK, hdr->id) | + FIELD_PREP(MSG_TOKEN_ID_MASK, hdr->seq) | + FIELD_PREP(MSG_PROTOCOL_ID_MASK, hdr->protocol_id); +} + +/** + * unpack_scmi_header() - unpacks and records message and protocol id + * + * @msg_hdr: 32-bit packed message header sent from the platform + * @hdr: pointer to header to fetch message and protocol id. + */ +static inline void unpack_scmi_header(u32 msg_hdr, struct scmi_msg_hdr *hdr) +{ + hdr->id = MSG_XTRACT_ID(msg_hdr); + hdr->protocol_id = MSG_XTRACT_PROT_ID(msg_hdr); +} + +/** * struct scmi_msg - Message(Tx/Rx) structure * * @buf: Buffer pointer |