diff options
| author | Christof Schmitt <christof.schmitt@de.ibm.com> | 2010-04-30 18:09:34 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-05-02 21:42:30 +0200 |
| commit | 1674b4054744c2cfd6573e43eca45d86ff581d0e (patch) | |
| tree | 6a59f4f00b15b30313c330e9636b36c88c93a1c9 /drivers/s390/scsi/zfcp_fsf.h | |
| parent | [SCSI] zfcp: Report scatter-gather limits to SCSI and block layer (diff) | |
| download | linux-1674b4054744c2cfd6573e43eca45d86ff581d0e.tar.xz linux-1674b4054744c2cfd6573e43eca45d86ff581d0e.zip | |
[SCSI] zfcp: Move sbale handling to zfcp_qdio files
Move the code accessing the qdio sbales and zfcp_qdio_req struct to
the zfcp_qdio files and provide helper functions for accessing the
qdio related parts.
Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h index b3de682b64cf..4008bd786793 100644 --- a/drivers/s390/scsi/zfcp_fsf.h +++ b/drivers/s390/scsi/zfcp_fsf.h @@ -3,7 +3,7 @@ * * Interface to the FSF support functions. * - * Copyright IBM Corporation 2002, 2009 + * Copyright IBM Corporation 2002, 2010 */ #ifndef FSF_H @@ -152,7 +152,12 @@ #define FSF_CLASS_3 0x00000003 /* SBAL chaining */ -#define FSF_MAX_SBALS_PER_REQ 36 +#define ZFCP_FSF_MAX_SBALS_PER_REQ 36 + +/* max. number of (data buffer) SBALEs in largest SBAL chain + * request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ +#define ZFCP_FSF_MAX_SBALES_PER_REQ \ + (ZFCP_FSF_MAX_SBALS_PER_REQ * ZFCP_QDIO_MAX_SBALES_PER_SBAL - 2) /* logging space behind QTCB */ #define FSF_QTCB_LOG_SIZE 1024 |