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[SCSI] zfcp: Introduce experimental support for DIF/DIX

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Introduce support for DIF/DIX in zfcp: Report the capabilities for the
Scsi_host, map the protection data when issuing I/O requests and
handle the new error codes. Also add the fsf data_direction field to
the hba trace, it is useful information for debugging in that area.
This is an EXPERIMENTAL feature for now.

Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Felix Beck
2010-07-16 15:37:42 +02:00
committed by James Bottomley
parent dcc18f48a2
commit ef3eb71d8b
10 changed files with 189 additions and 30 deletions
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16
drivers/s390/scsi/zfcp_qdio.h
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@@ -215,4 +215,20 @@ void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio,
QDIO_MAX_BUFFERS_PER_Q;
}
/**
* zfcp_qdio_set_data_div - set data division count
* @qdio: pointer to struct zfcp_qdio
* @q_req: The current zfcp_qdio_req
* @count: The data division count
*/
static inline
void zfcp_qdio_set_data_div(struct zfcp_qdio *qdio,
struct zfcp_qdio_req *q_req, u32 count)
{
struct qdio_buffer_element *sbale;
sbale = &qdio->req_q[q_req->sbal_first]->element[0];
sbale->length = count;
}
#endif /* ZFCP_QDIO_H */