blob: a7cf550b9cca0ba030f7b58a8c81ccc2ef954e41 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* 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
|
