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authorVarun Prakash <varun@chelsio.com>2016-12-01 17:58:29 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2016-12-14 23:09:13 +0300
commit44830d8fd28a729729d14bb160341a6170631eb7 (patch)
tree1c103c0e31d7454671542ded8c25800af002ec40 /drivers/scsi/cxgbi/libcxgbi.c
parent586be7cb694fdbb3a35cc35c03387ce0fc534572 (diff)
downloadlinux-44830d8fd28a729729d14bb160341a6170631eb7.tar.xz
scsi: cxgb4i: libcxgbi: cxgb4: add T6 iSCSI completion feature
T6 adapters reduce number of completions to host by generating single completion for all the directly placed(DDP) iSCSI pdus in a sequence. This patch adds new structure for completion hw cmd (struct cpl_rx_iscsi_cmp) and implements T6 completion feature. Signed-off-by: Varun Prakash <varun@chelsio.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/cxgbi/libcxgbi.c')
-rw-r--r--drivers/scsi/cxgbi/libcxgbi.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 542337889224..eb4af124d5cd 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -1574,6 +1574,25 @@ static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb)
return -EIO;
}
+ if (cxgbi_skcb_test_flag(skb, SKCBF_RX_ISCSI_COMPL) &&
+ cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA_DDPD)) {
+ /* If completion flag is set and data is directly
+ * placed in to the host memory then update
+ * task->exp_datasn to the datasn in completion
+ * iSCSI hdr as T6 adapter generates completion only
+ * for the last pdu of a sequence.
+ */
+ itt_t itt = ((struct iscsi_data *)skb->data)->itt;
+ struct iscsi_task *task = iscsi_itt_to_ctask(conn, itt);
+ u32 data_sn = be32_to_cpu(((struct iscsi_data *)
+ skb->data)->datasn);
+ if (task && task->sc) {
+ struct iscsi_tcp_task *tcp_task = task->dd_data;
+
+ tcp_task->exp_datasn = data_sn;
+ }
+ }
+
return read_pdu_skb(conn, skb, 0, 0);
}