[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