949847d195
added per-task struct cxgb3i_task_data to track the data transmiting progress and the state of the pdus to be transmitted. Signed-off-by: Karen Xie <kxie@chelsio.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/*
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* cxgb3i.h: Chelsio S3xx iSCSI driver.
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*
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* Copyright (c) 2008 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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* Written by: Karen Xie (kxie@chelsio.com)
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*/
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#ifndef __CXGB3I_H__
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#define __CXGB3I_H__
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/scatterlist.h>
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#include <linux/skbuff.h>
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#include <scsi/libiscsi_tcp.h>
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/* from cxgb3 LLD */
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#include "common.h"
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#include "t3_cpl.h"
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#include "t3cdev.h"
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#include "cxgb3_ctl_defs.h"
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#include "cxgb3_offload.h"
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#include "firmware_exports.h"
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#include "cxgb3i_offload.h"
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#include "cxgb3i_ddp.h"
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#define CXGB3I_SCSI_QDEPTH_DFLT 128
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#define CXGB3I_MAX_TARGET CXGB3I_MAX_CONN
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#define CXGB3I_MAX_LUN 512
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#define ISCSI_PDU_NONPAYLOAD_MAX \
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(sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE)
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struct cxgb3i_adapter;
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struct cxgb3i_hba;
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struct cxgb3i_endpoint;
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/**
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* struct cxgb3i_hba - cxgb3i iscsi structure (per port)
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*
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* @snic: cxgb3i adapter containing this port
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* @ndev: pointer to netdev structure
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* @shost: pointer to scsi host structure
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*/
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struct cxgb3i_hba {
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struct cxgb3i_adapter *snic;
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struct net_device *ndev;
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struct Scsi_Host *shost;
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};
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/**
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* struct cxgb3i_adapter - cxgb3i adapter structure (per pci)
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*
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* @listhead: list head to link elements
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* @lock: lock for this structure
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* @tdev: pointer to t3cdev used by cxgb3 driver
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* @pdev: pointer to pci dev
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* @hba_cnt: # of hbas (the same as # of ports)
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* @hba: all the hbas on this adapter
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* @tx_max_size: max. tx packet size supported
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* @rx_max_size: max. rx packet size supported
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* @tag_format: ddp tag format settings
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*/
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struct cxgb3i_adapter {
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struct list_head list_head;
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spinlock_t lock;
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struct t3cdev *tdev;
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struct pci_dev *pdev;
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unsigned char hba_cnt;
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struct cxgb3i_hba *hba[MAX_NPORTS];
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unsigned int tx_max_size;
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unsigned int rx_max_size;
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struct cxgb3i_tag_format tag_format;
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};
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/**
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* struct cxgb3i_conn - cxgb3i iscsi connection
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*
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* @listhead: list head to link elements
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* @cep: pointer to iscsi_endpoint structure
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* @conn: pointer to iscsi_conn structure
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* @hba: pointer to the hba this conn. is going through
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* @task_idx_bits: # of bits needed for session->cmds_max
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*/
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struct cxgb3i_conn {
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struct list_head list_head;
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struct cxgb3i_endpoint *cep;
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struct iscsi_conn *conn;
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struct cxgb3i_hba *hba;
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unsigned int task_idx_bits;
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};
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/**
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* struct cxgb3i_endpoint - iscsi tcp endpoint
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*
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* @c3cn: the h/w tcp connection representation
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* @hba: pointer to the hba this conn. is going through
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* @cconn: pointer to the associated cxgb3i iscsi connection
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*/
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struct cxgb3i_endpoint {
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struct s3_conn *c3cn;
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struct cxgb3i_hba *hba;
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struct cxgb3i_conn *cconn;
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};
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/**
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* struct cxgb3i_task_data - private iscsi task data
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*
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* @nr_frags: # of coalesced page frags (from scsi sgl)
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* @frags: coalesced page frags (from scsi sgl)
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* @skb: tx pdu skb
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* @offset: data offset for the next pdu
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* @count: max. possible pdu payload
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* @sgoffset: offset to the first sg entry for a given offset
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*/
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#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
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struct cxgb3i_task_data {
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unsigned short nr_frags;
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skb_frag_t frags[MAX_PDU_FRAGS];
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struct sk_buff *skb;
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unsigned int offset;
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unsigned int count;
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unsigned int sgoffset;
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};
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int cxgb3i_iscsi_init(void);
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void cxgb3i_iscsi_cleanup(void);
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struct cxgb3i_adapter *cxgb3i_adapter_add(struct t3cdev *);
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void cxgb3i_adapter_remove(struct t3cdev *);
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int cxgb3i_adapter_ulp_init(struct cxgb3i_adapter *);
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void cxgb3i_adapter_ulp_cleanup(struct cxgb3i_adapter *);
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struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *);
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struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *,
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struct net_device *);
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void cxgb3i_hba_host_remove(struct cxgb3i_hba *);
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int cxgb3i_pdu_init(void);
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void cxgb3i_pdu_cleanup(void);
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void cxgb3i_conn_cleanup_task(struct iscsi_task *);
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int cxgb3i_conn_alloc_pdu(struct iscsi_task *, u8);
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int cxgb3i_conn_init_pdu(struct iscsi_task *, unsigned int, unsigned int);
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int cxgb3i_conn_xmit_pdu(struct iscsi_task *);
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void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt);
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int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt);
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#endif
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