[SCSI] cxgb3i: Add cxgb3i iSCSI driver.

This patch implements the cxgb3i iscsi connection acceleration for the
open-iscsi initiator.

The cxgb3i driver offers the iscsi PDU based offload:
- digest insertion and verification
- payload direct-placement into host memory buffer.

Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/scsi/cxgb3i/cxgb3i_pdu.h b/drivers/scsi/cxgb3i/cxgb3i_pdu.h
new file mode 100644
index 000000000000..a3f685cc2362
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_pdu.h
@@ -0,0 +1,59 @@
+/*
+ * cxgb3i_ulp2.h: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#ifndef __CXGB3I_ULP2_PDU_H__
+#define __CXGB3I_ULP2_PDU_H__
+
+struct cpl_iscsi_hdr_norss {
+	union opcode_tid ot;
+	u16 pdu_len_ddp;
+	u16 len;
+	u32 seq;
+	u16 urg;
+	u8 rsvd;
+	u8 status;
+};
+
+struct cpl_rx_data_ddp_norss {
+	union opcode_tid ot;
+	u16 urg;
+	u16 len;
+	u32 seq;
+	u32 nxt_seq;
+	u32 ulp_crc;
+	u32 ddp_status;
+};
+
+#define RX_DDP_STATUS_IPP_SHIFT		27	/* invalid pagepod */
+#define RX_DDP_STATUS_TID_SHIFT		26	/* tid mismatch */
+#define RX_DDP_STATUS_COLOR_SHIFT	25	/* color mismatch */
+#define RX_DDP_STATUS_OFFSET_SHIFT	24	/* offset mismatch */
+#define RX_DDP_STATUS_ULIMIT_SHIFT	23	/* ulimit error */
+#define RX_DDP_STATUS_TAG_SHIFT		22	/* tag mismatch */
+#define RX_DDP_STATUS_DCRC_SHIFT	21	/* dcrc error */
+#define RX_DDP_STATUS_HCRC_SHIFT	20	/* hcrc error */
+#define RX_DDP_STATUS_PAD_SHIFT		19	/* pad error */
+#define RX_DDP_STATUS_PPP_SHIFT		18	/* pagepod parity error */
+#define RX_DDP_STATUS_LLIMIT_SHIFT	17	/* llimit error */
+#define RX_DDP_STATUS_DDP_SHIFT		16	/* ddp'able */
+#define RX_DDP_STATUS_PMM_SHIFT		15	/* pagepod mismatch */
+
+#define ULP2_FLAG_DATA_READY		0x1
+#define ULP2_FLAG_DATA_DDPED		0x2
+#define ULP2_FLAG_HCRC_ERROR		0x10
+#define ULP2_FLAG_DCRC_ERROR		0x20
+#define ULP2_FLAG_PAD_ERROR		0x40
+
+void cxgb3i_conn_closing(struct s3_conn *);
+void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn);
+void cxgb3i_conn_tx_open(struct s3_conn *c3cn);
+#endif