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mei: hbm: introduce dma bit in the message header 

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>
hifive-unleashed-5.1
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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1
drivers/misc/mei/client.c
View File

@ -1551,6 +1551,7 @@ static void mei_msg_hdr_init(struct mei_msg_hdr *mei_hdr, struct mei_cl_cb *cb)
mei_hdr->length = 0;
mei_hdr->reserved = 0;
mei_hdr->msg_complete = 0;
mei_hdr->dma_ring = 0;
mei_hdr->internal = cb->internal;
}

1
drivers/misc/mei/hbm.c
View File

@ -145,6 +145,7 @@ static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
hdr->me_addr = 0;
hdr->length = length;
hdr->msg_complete = 1;
hdr->dma_ring = 0;
hdr->reserved = 0;
hdr->internal = 0;
}

16
drivers/misc/mei/hw.h
View File

@ -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];

4
drivers/misc/mei/mei_dev.h
View File

@ -714,10 +714,10 @@ static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
int mei_register(struct mei_device *dev, struct device *parent);
void mei_deregister(struct mei_device *dev);
#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d internal=%1d comp=%1d"
#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d dma=%1d internal=%1d comp=%1d"
#define MEI_HDR_PRM(hdr) \
(hdr)->host_addr, (hdr)->me_addr, \
(hdr)->length, (hdr)->internal, (hdr)->msg_complete
(hdr)->length, (hdr)->dma_ring, (hdr)->internal, (hdr)->msg_complete
ssize_t mei_fw_status2str(struct mei_fw_status *fw_sts, char *buf, size_t len);
/**