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authorSwen Schillig <swen@vnet.ibm.com>2011-08-15 14:40:32 +0200
committerJames Bottomley <JBottomley@Parallels.com>2011-08-27 08:37:03 -0600
commit86a9668a8d29ea711613e1cb37efa68e7c4db564 (patch)
tree58a39ba842f928bd9629cfb8468322a96fe7459f /drivers/s390/scsi/zfcp_fsf.c
parentdfe5bb506172307e43287b8962348fb85801c0f4 (diff)
downloadop-kernel-dev-86a9668a8d29ea711613e1cb37efa68e7c4db564.zip
op-kernel-dev-86a9668a8d29ea711613e1cb37efa68e7c4db564.tar.gz
[SCSI] zfcp: support for hardware data router
FICON Express8S supports hardware data router, which requires an adapted qdio request format. This part 2/2 exploits the functionality in zfcp. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.c')
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c77
1 files changed, 47 insertions, 30 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index fa86c6a..e9a787e 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -936,39 +936,47 @@ static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
struct scatterlist *sg_resp)
{
struct zfcp_adapter *adapter = req->adapter;
+ struct zfcp_qdio *qdio = adapter->qdio;
+ struct fsf_qtcb *qtcb = req->qtcb;
u32 feat = adapter->adapter_features;
- int bytes;
- if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
- if (!zfcp_qdio_sg_one_sbale(sg_req) ||
- !zfcp_qdio_sg_one_sbale(sg_resp))
- return -EOPNOTSUPP;
+ if (zfcp_adapter_multi_buffer_active(adapter)) {
+ if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
+ return -EIO;
+ if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
+ return -EIO;
- zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
- sg_req, sg_resp);
+ zfcp_qdio_set_data_div(qdio, &req->qdio_req,
+ zfcp_qdio_sbale_count(sg_req));
+ zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
+ zfcp_qdio_set_scount(qdio, &req->qdio_req);
return 0;
}
/* use single, unchained SBAL if it can hold the request */
if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) {
- zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req,
+ zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req,
sg_req, sg_resp);
return 0;
}
- bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, sg_req);
- if (bytes <= 0)
+ if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS))
+ return -EOPNOTSUPP;
+
+ if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req))
return -EIO;
- zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
- req->qtcb->bottom.support.req_buf_length = bytes;
- zfcp_qdio_skip_to_last_sbale(&req->qdio_req);
- bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,
- sg_resp);
- req->qtcb->bottom.support.resp_buf_length = bytes;
- if (bytes <= 0)
+ qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req);
+
+ zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
+ zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req);
+
+ if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp))
return -EIO;
- zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
+
+ qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp);
+
+ zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
return 0;
}
@@ -1119,7 +1127,8 @@ int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
- zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
+ if (!zfcp_adapter_multi_buffer_active(adapter))
+ zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2);
ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout);
@@ -2162,7 +2171,7 @@ int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
struct zfcp_fsf_req *req;
struct fcp_cmnd *fcp_cmnd;
u8 sbtype = SBAL_SFLAGS0_TYPE_READ;
- int real_bytes, retval = -EIO, dix_bytes = 0;
+ int retval = -EIO;
struct scsi_device *sdev = scsi_cmnd->device;
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
@@ -2216,18 +2225,22 @@ int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
if (scsi_prot_sg_count(scsi_cmnd)) {
zfcp_qdio_set_data_div(qdio, &req->qdio_req,
scsi_prot_sg_count(scsi_cmnd));
- dix_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
+ retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
+ scsi_prot_sglist(scsi_cmnd));
+ if (retval)
+ goto failed_scsi_cmnd;
+ io->prot_data_length = zfcp_qdio_real_bytes(
scsi_prot_sglist(scsi_cmnd));
- io->prot_data_length = dix_bytes;
}
- real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
- scsi_sglist(scsi_cmnd));
-
- if (unlikely(real_bytes < 0) || unlikely(dix_bytes < 0))
+ retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,
+ scsi_sglist(scsi_cmnd));
+ if (unlikely(retval))
goto failed_scsi_cmnd;
zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
+ if (zfcp_adapter_multi_buffer_active(adapter))
+ zfcp_qdio_set_scount(qdio, &req->qdio_req);
retval = zfcp_fsf_req_send(req);
if (unlikely(retval))
@@ -2329,7 +2342,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
struct zfcp_qdio *qdio = adapter->qdio;
struct zfcp_fsf_req *req = NULL;
struct fsf_qtcb_bottom_support *bottom;
- int retval = -EIO, bytes;
+ int retval = -EIO;
u8 direction;
if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
@@ -2362,13 +2375,17 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
bottom->option = fsf_cfdc->option;
- bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
+ retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, fsf_cfdc->sg);
- if (bytes != ZFCP_CFDC_MAX_SIZE) {
+ if (retval ||
+ (zfcp_qdio_real_bytes(fsf_cfdc->sg) != ZFCP_CFDC_MAX_SIZE)) {
zfcp_fsf_req_free(req);
+ retval = -EIO;
goto out;
}
- zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req);
+ zfcp_qdio_set_sbale_last(qdio, &req->qdio_req);
+ if (zfcp_adapter_multi_buffer_active(adapter))
+ zfcp_qdio_set_scount(qdio, &req->qdio_req);
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
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