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 21 struct cxgbit_lro_cb { 22 struct cxgbit_sock *csk; 23 u32 pdu_totallen; 24 u32 offset; 25 u8 pdu_idx; 26 bool complete; 27 }; 28 29 enum 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 39 struct 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