10eb0f013c
When we create the tcp/ip connection by calling ep_connect, we currently just go by the routing table info. I think there are two problems with this. 1. Some drivers do not have access to a routing table. Some drivers like qla4xxx do not even know about other ports. 2. If you have two initiator ports on the same subnet, the user may have set things up so that session1 was supposed to be run through port1. and session2 was supposed to be run through port2. It looks like we could end with both sessions going through one of the ports. Fixes for cxgb3i from Karen Xie. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
161 lines
4.3 KiB
C
161 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_HOST_QDEPTH 1024
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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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* @flags: bit flag for adapter event/status
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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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#define CXGB3I_ADAPTER_FLAG_RESET 0x1
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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 flags;
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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_find_by_tdev(struct t3cdev *);
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void cxgb3i_adapter_open(struct t3cdev *);
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void cxgb3i_adapter_close(struct t3cdev *);
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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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