diff options
| author | Varun Prakash <varun@chelsio.com> | 2016-12-01 17:58:29 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-12-14 23:09:13 +0300 |
| commit | 44830d8fd28a729729d14bb160341a6170631eb7 (patch) | |
| tree | 1c103c0e31d7454671542ded8c25800af002ec40 /drivers/scsi/cxgbi/libcxgbi.c | |
| parent | 586be7cb694fdbb3a35cc35c03387ce0fc534572 (diff) | |
| download | linux-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.c | 19 |
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); } |