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| author | Tomas Winkler <tomas.winkler@intel.com> | 2015-07-23 21:37:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 17:25:51 -0700 |
| commit | 70ef835c84b3b88e274a53bf80a70940ae178a91 (patch) | |
| tree | 8404cb25e3671d6ab273f0c48de87c2435e8868b /drivers/misc/mei/hw.h | |
| parent | 6009595a66e460af0b170d736398c49395cb4499 (diff) | |
| download | linux-70ef835c84b3b88e274a53bf80a70940ae178a91.tar.bz2 | |
mei: support for dynamic clients
HBM version 2.0 and above allows ME clients in the system to
register/unregister after the system is fully initialized.
Clients may be added or removed after enum_resp message was
received
1. To preserve backward compatibility the driver can opt-in to receive
client add messages by setting allow_add field in enum_req
2. A new client is added upon reception of MEI_HBM_ADD_CLIENT_REQ_CMD
3. A client is removed in a lazy manner when connection request
respond with MEI_HBMS_CLIENT_NOT_FOUND status
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/hw.h')
| -rw-r--r-- | drivers/misc/mei/hw.h | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h index 16fef6dc4dd7..815f40a604b9 100644 --- a/drivers/misc/mei/hw.h +++ b/drivers/misc/mei/hw.h @@ -46,6 +46,12 @@ #define HBM_MINOR_VERSION_PGI 1 #define HBM_MAJOR_VERSION_PGI 1 +/* + * MEI version with Dynamic clients support + */ +#define HBM_MINOR_VERSION_DC 0 +#define HBM_MAJOR_VERSION_DC 2 + /* Host bus message command opcode */ #define MEI_HBM_CMD_OP_MSK 0x7f /* Host bus message command RESPONSE */ @@ -81,6 +87,8 @@ #define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b #define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b +#define MEI_HBM_ADD_CLIENT_REQ_CMD 0x0f +#define MEI_HBM_ADD_CLIENT_RES_CMD 0x8f /* * MEI Stop Reason * used by hbm_host_stop_request.reason @@ -213,9 +221,17 @@ struct hbm_me_stop_request { u8 reserved[2]; } __packed; +/** + * struct hbm_host_enum_request - enumeration request from host to fw + * + * @hbm_cmd: bus message command header + * @allow_add: allow dynamic clients add HBM version >= 2.0 + * @reserved: reserved + */ struct hbm_host_enum_request { u8 hbm_cmd; - u8 reserved[3]; + u8 allow_add; + u8 reserved[2]; } __packed; struct hbm_host_enum_response { @@ -248,6 +264,38 @@ struct hbm_props_response { } __packed; /** + * struct hbm_add_client_request - request to add a client + * might be sent by fw after enumeration has already completed + * + * @hbm_cmd: bus message command header + * @me_addr: address of the client in ME + * @reserved: reserved + * @client_properties: client properties + */ +struct hbm_add_client_request { + u8 hbm_cmd; + u8 me_addr; + u8 reserved[2]; + struct mei_client_properties client_properties; +} __packed; + +/** + * struct hbm_add_client_response - response to add a client + * sent by the host to report client addition status to fw + * + * @hbm_cmd: bus message command header + * @me_addr: address of the client in ME + * @status: if HBMS_SUCCESS then the client can now accept connections. + * @reserved: reserved + */ +struct hbm_add_client_response { + u8 hbm_cmd; + u8 me_addr; + u8 status; + u8 reserved[1]; +} __packed; + +/** * struct hbm_power_gate - power gate request/response * * @hbm_cmd: bus message command header |