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