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1/*2 * Copyright (c) 2016 Chelsio Communications, Inc.3 *4 * This program is free software; you can redistribute it and/or modify5 * it under the terms of the GNU General Public License as published by6 * 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 6553520 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