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| author | Christof Schmitt <christof.schmitt@de.ibm.com> | 2011-02-22 19:54:41 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2011-02-25 12:02:03 -0500 |
| commit | 087897e36982ef8536dc9c8baed159a31517b5e6 (patch) | |
| tree | 3d54e6ca8880f226cfe77c2266a47b6f3474b493 /drivers/s390/scsi/zfcp_fc.h | |
| parent | c7b279ae51942c14529bf2806685e9c658f28611 (diff) | |
| download | blackbird-op-linux-087897e36982ef8536dc9c8baed159a31517b5e6.tar.gz blackbird-op-linux-087897e36982ef8536dc9c8baed159a31517b5e6.zip | |
[SCSI] zfcp: Introduce new kmem_cache for FC request and response data
A data buffer that is passed to the hardware must not cross a page
boundary. zfcp uses a series of kmem_caches to align the data to not
cross a page boundary. Introduce a new kmem_cache for the FC requests
sent from the zfcp driver and use it for the ELS ADISC data. The goal
is to migrate to the FC kmem_cache in later patches and remove the
request specific kmem_caches.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi/zfcp_fc.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_fc.h | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/s390/scsi/zfcp_fc.h b/drivers/s390/scsi/zfcp_fc.h index b464ae01086c..4351b4e81b3c 100644 --- a/drivers/s390/scsi/zfcp_fc.h +++ b/drivers/s390/scsi/zfcp_fc.h @@ -123,19 +123,22 @@ struct zfcp_fc_gpn_ft { }; /** - * struct zfcp_fc_els_adisc - everything required in zfcp for issuing ELS ADISC - * @els: data required for issuing els fsf command - * @req: scatterlist entry for ELS ADISC request - * @resp: scatterlist entry for ELS ADISC response - * @adisc_req: ELS ADISC request data - * @adisc_resp: ELS ADISC response data + * struct zfcp_fc_req - Container for FC ELS and CT requests sent from zfcp + * @ct_els: data required for issuing fsf command + * @sg_req: scatterlist entry for request data + * @sg_rsp: scatterlist entry for response data + * @u: request specific data */ -struct zfcp_fc_els_adisc { - struct zfcp_fsf_ct_els els; - struct scatterlist req; - struct scatterlist resp; - struct fc_els_adisc adisc_req; - struct fc_els_adisc adisc_resp; +struct zfcp_fc_req { + struct zfcp_fsf_ct_els ct_els; + struct scatterlist sg_req; + struct scatterlist sg_rsp; + union { + struct { + struct fc_els_adisc req; + struct fc_els_adisc rsp; + } adisc; + } u; }; /** |
