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