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| author | Tomas Winkler <tomas.winkler@intel.com> | 2018-11-22 14:11:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-26 18:59:48 +0300 |
| commit | 6316321f12ad30cf5af176f26bb39897b320ef46 (patch) | |
| tree | a29d1f9023ba3edc9f2c9313cb5fdf24cb1f44c6 /drivers/misc/mei/hw.h | |
| parent | 2513eb0dd7ba8a8766b9642075c19ac5f2d5463b (diff) | |
| download | linux-6316321f12ad30cf5af176f26bb39897b320ef46.tar.xz | |
mei: dma ring: implement rx circular buffer logic
Implement circular buffer protocol over receive dma
buffer. Add extension to the mei message header that holds
length of the buffer on the dma buffer.
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>
Diffstat (limited to 'drivers/misc/mei/hw.h')
| -rw-r--r-- | drivers/misc/mei/hw.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h index 4f09bbcdbc2a..acbccb8dba34 100644 --- a/drivers/misc/mei/hw.h +++ b/drivers/misc/mei/hw.h @@ -206,6 +206,7 @@ enum mei_cl_disconnect_status { * @dma_ring: message is on dma ring * @internal: message is internal * @msg_complete: last packet of the message + * @extension: extension of the header */ struct mei_msg_hdr { u32 me_addr:8; @@ -215,8 +216,11 @@ struct mei_msg_hdr { u32 dma_ring:1; u32 internal:1; u32 msg_complete:1; + u32 extension[0]; } __packed; +#define MEI_MSG_HDR_MAX 2 + struct mei_bus_message { u8 hbm_cmd; u8 data[0]; |