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mei: hbm: introduce dma bit in the message header

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Add dma_ring bit in the mei message header for conveying
that the message data itself are on the dma ring.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2018-07-31 09:35:35 +03:00
committed by Greg Kroah-Hartman
parent ee7aba5aba
commit 9d89ddfc62
4 changed files with 16 additions and 6 deletions
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16
drivers/misc/mei/hw.h
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@@ -190,19 +190,27 @@ enum mei_cl_disconnect_status {
MEI_CL_DISCONN_SUCCESS = MEI_HBMS_SUCCESS
};
/*
* MEI BUS Interface Section
/**
* struct mei_msg_hdr - MEI BUS Interface Section
*
* @me_addr: device address
* @host_addr: host address
* @length: message length
* @reserved: reserved
* @dma_ring: message is on dma ring
* @internal: message is internal
* @msg_complete: last packet of the message
*/
struct mei_msg_hdr {
u32 me_addr:8;
u32 host_addr:8;
u32 length:9;
u32 reserved:5;
u32 reserved:4;
u32 dma_ring:1;
u32 internal:1;
u32 msg_complete:1;
} __packed;
struct mei_bus_message {
u8 hbm_cmd;
u8 data[0];