79e57cfe00
Chelsio T6 adapters reduce number of completion to host by generating single completion for all directly placed(DDP) iSCSI pdus in a sequence, completion contains iSCSI hdr of the last pdu in a sequence. On receiving DDP completion cxgbit driver finds iSCSI cmd using iscsit_find_cmd_from_itt_or_dump(), then updates cmd->write_data_done, cmd->next_burst_len, cmd->data_sn and calls __iscsit_check_dataout_hdr() to validate iSCSI hdr. (Update __iscsit_check_dataout_hdr parameter usage - nab) Signed-off-by: Varun Prakash <varun@chelsio.com> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/*
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* Copyright (c) 2016 Chelsio Communications, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*
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*/
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#ifndef __CXGBIT_LRO_H__
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#define __CXGBIT_LRO_H__
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#define LRO_FLUSH_LEN_MAX 65535
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struct cxgbit_lro_cb {
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struct cxgbit_sock *csk;
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u32 pdu_totallen;
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u32 offset;
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u8 pdu_idx;
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bool complete;
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};
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enum cxgbit_pducb_flags {
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PDUCBF_RX_HDR = (1 << 0), /* received pdu header */
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PDUCBF_RX_DATA = (1 << 1), /* received pdu payload */
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PDUCBF_RX_STATUS = (1 << 2), /* received ddp status */
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PDUCBF_RX_DATA_DDPD = (1 << 3), /* pdu payload ddp'd */
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PDUCBF_RX_DDP_CMP = (1 << 4), /* ddp completion */
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PDUCBF_RX_HCRC_ERR = (1 << 5), /* header digest error */
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PDUCBF_RX_DCRC_ERR = (1 << 6), /* data digest error */
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};
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struct cxgbit_lro_pdu_cb {
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u8 flags;
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u8 frags;
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u8 hfrag_idx;
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u8 nr_dfrags;
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u8 dfrag_idx;
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bool complete;
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u32 seq;
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u32 pdulen;
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u32 hlen;
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u32 dlen;
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u32 doffset;
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u32 ddigest;
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void *hdr;
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};
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#define LRO_SKB_MAX_HEADROOM \
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(sizeof(struct cxgbit_lro_cb) + \
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(MAX_SKB_FRAGS * sizeof(struct cxgbit_lro_pdu_cb)))
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#define LRO_SKB_MIN_HEADROOM \
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(sizeof(struct cxgbit_lro_cb) + \
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sizeof(struct cxgbit_lro_pdu_cb))
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#define cxgbit_skb_lro_cb(skb) ((struct cxgbit_lro_cb *)skb->data)
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#define cxgbit_skb_lro_pdu_cb(skb, i) \
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((struct cxgbit_lro_pdu_cb *)(skb->data + sizeof(struct cxgbit_lro_cb) \
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+ (i * sizeof(struct cxgbit_lro_pdu_cb))))
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#define CPL_RX_ISCSI_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */
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#define CPL_RX_ISCSI_DDP_STATUS_PAD_SHIFT 19 /* pad error */
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#define CPL_RX_ISCSI_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */
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#define CPL_RX_ISCSI_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */
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#endif /*__CXGBIT_LRO_H_*/
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