From: Eddie Wai <eddie.wai@xxxxxxxxxxxx>
This is part of an effort to support send target discovery via
the iSCSI offload path.
Signed-off-by: Eddie Wai <eddie.wai@xxxxxxxxxxxx>
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
---
drivers/scsi/bnx2i/bnx2i.h | 2 +
drivers/scsi/bnx2i/bnx2i_hwi.c | 116 ++++++++++++++++++++++++++++++++++++++
drivers/scsi/bnx2i/bnx2i_iscsi.c | 6 ++-
3 files changed, 123 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/bnx2i/bnx2i.h b/drivers/scsi/bnx2i/bnx2i.h
index 2756853..cfd5902 100644
--- a/drivers/scsi/bnx2i/bnx2i.h
+++ b/drivers/scsi/bnx2i/bnx2i.h
@@ -751,6 +751,8 @@ extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
struct iscsi_task *mtask);
extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
struct iscsi_task *mtask);
+extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
+ struct iscsi_task *mtask);
extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
struct bnx2i_cmd *cmnd);
extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
diff --git a/drivers/scsi/bnx2i/bnx2i_hwi.c b/drivers/scsi/bnx2i/bnx2i_hwi.c
index c8eff57..1da34c0 100644
--- a/drivers/scsi/bnx2i/bnx2i_hwi.c
+++ b/drivers/scsi/bnx2i/bnx2i_hwi.c
@@ -445,6 +445,56 @@ int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
}
/**
+ * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
+ * @conn: iscsi connection
+ * @mtask: driver command structure which is requesting
+ * a WQE to sent to chip for further processing
+ *
+ * prepare and post an iSCSI Text request WQE to CNIC firmware
+ */
+int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
+ struct iscsi_task *mtask)
+{
+ struct bnx2i_cmd *bnx2i_cmd;
+ struct bnx2i_text_request *text_wqe;
+ struct iscsi_text *text_hdr;
+ u32 dword;
+
+ bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
+ text_hdr = (struct iscsi_text *)mtask->hdr;
+ text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
+
+ memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
+
+ text_wqe->op_code = text_hdr->opcode;
+ text_wqe->op_attr = text_hdr->flags;
+ text_wqe->data_length = ntoh24(text_hdr->dlength);
+ text_wqe->itt = mtask->itt |
+ (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
+ text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
+
+ text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
+
+ text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
+ text_wqe->resp_bd_list_addr_hi =
+ (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
+
+ dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
+ (bnx2i_conn->gen_pdu.resp_buf_size <<
+ ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
+ text_wqe->resp_buffer = dword;
+ text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
+ text_wqe->bd_list_addr_hi =
+ (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
+ text_wqe->num_bds = 1;
+ text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
+
+ bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
+ return 0;
+}
+
+
+/**
* bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
* @conn: iscsi connection
* @cmd: driver command structure which is requesting
@@ -1428,6 +1478,68 @@ done:
return 0;
}
+
+/**
+ * bnx2i_process_text_resp - this function handles iscsi text response
+ * @session: iscsi session pointer
+ * @bnx2i_conn: iscsi connection pointer
+ * @cqe: pointer to newly DMA'ed CQE entry for processing
+ *
+ * process iSCSI Text Response CQE& complete it to open-iscsi user daemon
+ */
+static int bnx2i_process_text_resp(struct iscsi_session *session,
+ struct bnx2i_conn *bnx2i_conn,
+ struct cqe *cqe)
+{
+ struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
+ struct iscsi_task *task;
+ struct bnx2i_text_response *text;
+ struct iscsi_text_rsp *resp_hdr;
+ int pld_len;
+ int pad_len;
+
+ text = (struct bnx2i_text_response *) cqe;
+ spin_lock(&session->lock);
+ task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
+ if (!task)
+ goto done;
+
+ resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
+ memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
+ resp_hdr->opcode = text->op_code;
+ resp_hdr->flags = text->response_flags;
+ resp_hdr->hlength = 0;
+
+ hton24(resp_hdr->dlength, text->data_length);
+ resp_hdr->itt = task->hdr->itt;
+ resp_hdr->ttt = cpu_to_be32(text->ttt);
+ resp_hdr->statsn = task->hdr->exp_statsn;
+ resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
+ resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
+ pld_len = text->data_length;
+ bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
+ pld_len;
+ pad_len = 0;
+ if (pld_len & 0x3)
+ pad_len = 4 - (pld_len % 4);
+
+ if (pad_len) {
+ int i = 0;
+ for (i = 0; i < pad_len; i++) {
+ bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
+ bnx2i_conn->gen_pdu.resp_wr_ptr++;
+ }
+ }
+ __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
+ bnx2i_conn->gen_pdu.resp_buf,
+ bnx2i_conn->gen_pdu.resp_wr_ptr -
+ bnx2i_conn->gen_pdu.resp_buf);
+done:
+ spin_unlock(&session->lock);
+ return 0;
+}
+
+
/**
* bnx2i_process_tmf_resp - this function handles iscsi TMF response
* @session: iscsi session pointer
@@ -1769,6 +1881,10 @@ static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
bnx2i_process_tmf_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
+ case ISCSI_OP_TEXT_RSP:
+ bnx2i_process_text_resp(session, bnx2i_conn,
+ qp->cq_cons_qe);
+ break;
case ISCSI_OP_LOGOUT_RSP:
bnx2i_process_logout_resp(session, bnx2i_conn,
qp->cq_cons_qe);
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index f9415aa..05bb808 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -1092,6 +1092,9 @@ static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
case ISCSI_OP_SCSI_TMFUNC:
rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
break;
+ case ISCSI_OP_TEXT:
+ rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
+ break;
default:
iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
"send_gen: unsupported op 0x%x\n",
@@ -2167,7 +2170,8 @@ struct iscsi_transport bnx2i_iscsi_transport = {
.name = "bnx2i",
.caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
CAP_MULTI_R2T | CAP_DATADGST |
- CAP_DATA_PATH_OFFLOAD,
+ CAP_DATA_PATH_OFFLOAD |
+ CAP_TEXT_NEGO,
.param_mask = ISCSI_MAX_RECV_DLENGTH |
ISCSI_MAX_XMIT_DLENGTH |
ISCSI_HDRDGST_EN |
--
1.7.2.3
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
