1/*
2 * Copyright (c) 2016 Chelsio Communications, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation.
7 *
8 */
9
10#ifndef	__CXGBIT_LRO_H__
11#define	__CXGBIT_LRO_H__
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/types.h>
17#include <linux/skbuff.h>
18
19#define LRO_FLUSH_LEN_MAX	65535
20
21struct cxgbit_lro_cb {
22	struct cxgbit_sock *csk;
23	u32 pdu_totallen;
24	u32 offset;
25	u8 pdu_idx;
26	bool complete;
27};
28
29enum cxgbit_pducb_flags {
30	PDUCBF_RX_HDR		= (1 << 0), /* received pdu header */
31	PDUCBF_RX_DATA		= (1 << 1), /* received pdu payload */
32	PDUCBF_RX_STATUS	= (1 << 2), /* received ddp status */
33	PDUCBF_RX_DATA_DDPD	= (1 << 3), /* pdu payload ddp'd */
34	PDUCBF_RX_DDP_CMP	= (1 << 4), /* ddp completion */
35	PDUCBF_RX_HCRC_ERR	= (1 << 5), /* header digest error */
36	PDUCBF_RX_DCRC_ERR	= (1 << 6), /* data digest error */
37};
38
39struct cxgbit_lro_pdu_cb {
40	u8 flags;
41	u8 frags;
42	u8 hfrag_idx;
43	u8 nr_dfrags;
44	u8 dfrag_idx;
45	bool complete;
46	u32 seq;
47	u32 pdulen;
48	u32 hlen;
49	u32 dlen;
50	u32 doffset;
51	u32 ddigest;
52	void *hdr;
53};
54
55#define LRO_SKB_MAX_HEADROOM  \
56		(sizeof(struct cxgbit_lro_cb) + \
57		 (MAX_SKB_FRAGS * sizeof(struct cxgbit_lro_pdu_cb)))
58
59#define LRO_SKB_MIN_HEADROOM  \
60		(sizeof(struct cxgbit_lro_cb) + \
61		 sizeof(struct cxgbit_lro_pdu_cb))
62
63#define cxgbit_skb_lro_cb(skb)	((struct cxgbit_lro_cb *)skb->data)
64#define cxgbit_skb_lro_pdu_cb(skb, i)	\
65	((struct cxgbit_lro_pdu_cb *)(skb->data + sizeof(struct cxgbit_lro_cb) \
66		+ (i * sizeof(struct cxgbit_lro_pdu_cb))))
67
68#define CPL_RX_ISCSI_DDP_STATUS_DDP_SHIFT	16 /* ddp'able */
69#define CPL_RX_ISCSI_DDP_STATUS_PAD_SHIFT	19 /* pad error */
70#define CPL_RX_ISCSI_DDP_STATUS_HCRC_SHIFT	20 /* hcrc error */
71#define CPL_RX_ISCSI_DDP_STATUS_DCRC_SHIFT	21 /* dcrc error */
72
73#endif	/*__CXGBIT_LRO_H_*/
74