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/*
* 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_LEN_MAX 65535
struct cxgbit_lro_cb {
struct cxgbit_sock *csk;
u32 pdu_totallen;
u32 offset;
u8 pdu_idx;
bool complete;
};
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_DDP_CMP = (1 << 4), /* ddp completion */
PDUCBF_RX_HCRC_ERR = (1 << 5), /* header digest error */
PDUCBF_RX_DCRC_ERR = (1 << 6), /* data digest error */
};
struct cxgbit_lro_pdu_cb {
u8 flags;
u8 frags;
u8 hfrag_idx;
u8 nr_dfrags;
u8 dfrag_idx;
bool complete;
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_*/
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