diff options
| author | Etienne Carriere <etienne.carriere@linaro.org> | 2021-04-05 13:59:43 +0200 |
|---|---|---|
| committer | Jérôme Forissier <jerome@forissier.org> | 2021-04-29 09:25:07 +0200 |
| commit | b0a1c2504aafdb9804b1b64fe8792918dfbdcd72 (patch) | |
| tree | 516d935257fd146ff50220c73f8e7ed9f1d337bd /lib | |
| parent | 3e530666840c1d676be8de1c137e07c598fa02cc (diff) | |
core: pta: scmi: new interface to REE SCMI agent
Adds a PTA interface to REE SCMI agents to get SCMI message communication
channel for processing in OP-TEE SCMI server.
Currently implement supports for a SCMI server built with
CFG_SCMI_MSG_SMT=y. The implementation is made so that an alternate
SCMI server implementation can added.
Client gets SCMI channel capabilities with PTA_SCMI_CMD_CAPABILITIES.
Client gets a handle for an SCMI channel with command
PTA_SCMI_CMD_GET_CHANNEL_HANDLE.
Client pushes SCMI messages with command PTA_SCMI_CMD_PROCESS_SMT_CHANNEL
or PTA_SCMI_CMD_PROCESS_SMT_CHANNEL_MESSAGE.
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libutee/include/pta_scmi_client.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/libutee/include/pta_scmi_client.h b/lib/libutee/include/pta_scmi_client.h new file mode 100644 index 00000000..2e98bc77 --- /dev/null +++ b/lib/libutee/include/pta_scmi_client.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (c) 2019-2021, Linaro Limited + */ +#ifndef PTA_SCMI_CLIENT_H +#define PTA_SCMI_CLIENT_H + +#define PTA_SCMI_UUID { 0xa8cfe406, 0xd4f5, 0x4a2e, \ + { 0x9f, 0x8d, 0xa2, 0x5d, 0xc7, 0x54, 0xc0, 0x99 } } + +#define PTA_SCMI_NAME "PTA-SCMI" + +/* + * PTA_SCMI_CMD_CAPABILITIES - Get channel capabilities + * + * [out] value[0].a: Capabilities bit mask (PTA_SCMI_CAPS_*) + * [out] value[0].b: Extended capabilities or 0 + */ +#define PTA_SCMI_CMD_CAPABILITIES 0 + +/* + * PTA_SCMI_CMD_PROCESS_SMT_CHANNEL - Process SCMI message in SMT buffer + * + * [in] value[0].a: Channel handle + * + * Shared memory used for SCMI message/response exhange is expected + * already identified and bound to channel handle in both SCMI agent + * and SCMI server (OP-TEE) parts. + * The memory uses SMT header to carry SCMI meta-data (protocol ID and + * protocol message ID). + */ +#define PTA_SCMI_CMD_PROCESS_SMT_CHANNEL 1 + +/* + * PTA_SCMI_CMD_PROCESS_SMT_CHANNEL_MESSAGE - Process SCMI message in + * SMT buffer pointed by memref parameters + * + * [in] value[0].a: Channel handle + * [in/out] memref[1]: Message/response buffer (SMT and SCMI payload) + * + * Shared memory used for SCMI message/response is a SMT buffer + * referenced by param[1]. It shall be 128 bytes large to fit response + * payload whatever message playload size. + * The memory uses SMT header to carry SCMI meta-data (protocol ID and + * protocol message ID). + */ +#define PTA_SCMI_CMD_PROCESS_SMT_CHANNEL_MESSAGE 2 + +/* + * PTA_SCMI_CMD_GET_CHANNEL_HANDLE - Get handle for an SCMI channel + * + * Get a handle for the SCMI channel. This handle value is to be passed + * as argument to some commands as PTA_SCMI_CMD_PROCESS_*. + * + * [in] value[0].a: Channel identifier or 0 if no assigned ID + * [in] value[0].b: Requested capabilities mask (PTA_SCMI_CAPS_*) + * [out] value[0].a: Returned channel handle + */ +#define PTA_SCMI_CMD_GET_CHANNEL_HANDLE 3 + +/* + * Capabilities + */ + +/* Channel supports shared memory using the SMT header protocol */ +#define PTA_SCMI_CAPS_SMT_HEADER BIT32(0) + +#endif /* SCMI_PTA_SCMI_CLIENT_H */ |