This file contains data structure
definitions for LRO support.
Signed-off-by: Varun Prakash <va...@chelsio.com>
---
drivers/target/iscsi/cxgbit/cxgbit_lro.h | 70 ++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_lro.h
diff --git a/drivers/target/iscsi/cxgbit/cxgbit_lro.h
b/drivers/target/iscsi/cxgbit/cxgbit_lro.h
new file mode 100644
index 0000000..74c840d
--- /dev/null
+++ b/drivers/target/iscsi/cxgbit/cxgbit_lro.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2016 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.
+ *
+ */
+
+#ifndef __CXGBIT_LRO_H__
+#define __CXGBIT_LRO_H__
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+
+#define LRO_FLUSH_TOTALLEN_MAX 65535
+
+struct cxgbit_lro_cb {
+ struct cxgbit_sock *csk;
+ u32 pdu_totallen;
+ u32 offset;
+ u8 pdu_cnt;
+ bool release;
+};
+
+enum cxgbit_pducb_flags {
+ PDUCBF_RX_HDR = (1 << 0), /* received pdu header */
+ PDUCBF_RX_DATA = (1 << 1), /* received pdu payload */
+ PDUCBF_RX_STATUS = (1 << 2), /* received ddp status */
+ PDUCBF_RX_DATA_DDPD = (1 << 3), /* pdu payload ddp'd */
+ PDUCBF_RX_HCRC_ERR = (1 << 4), /* header digest error */
+ PDUCBF_RX_DCRC_ERR = (1 << 5), /* data digest error */
+};
+
+struct cxgbit_lro_pdu_cb {
+ u8 flags;
+ u8 frags;
+ u8 nr_dfrags;
+ u8 dfrag_index;
+ u32 seq;
+ u32 pdulen;
+ u32 hlen;
+ u32 dlen;
+ u32 doffset;
+ u32 ddigest;
+ void *hdr;
+};
+
+#define LRO_SKB_MAX_HEADROOM \
+ (sizeof(struct cxgbit_lro_cb) + \
+ MAX_SKB_FRAGS * sizeof(struct cxgbit_lro_pdu_cb))
+
+#define LRO_SKB_MIN_HEADROOM \
+ (sizeof(struct cxgbit_lro_cb) + \
+ sizeof(struct cxgbit_lro_pdu_cb))
+
+#define cxgbit_skb_lro_cb(skb) ((struct cxgbit_lro_cb *)skb->data)
+#define cxgbit_skb_lro_pdu_cb(skb, i) \
+ ((struct cxgbit_lro_pdu_cb *)(skb->data + sizeof(struct cxgbit_lro_cb) \
+ + i * sizeof(struct cxgbit_lro_pdu_cb)))
+
+#define CPL_RX_ISCSI_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */
+#define CPL_RX_ISCSI_DDP_STATUS_PAD_SHIFT 19 /* pad error */
+#define CPL_RX_ISCSI_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */
+#define CPL_RX_ISCSI_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */
+
+#endif /*__CXGBIT_LRO_H_*/
--
2.0.2
--
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