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c3673464 KX |
1 | /* |
2 | * cxgb3i.h: Chelsio S3xx iSCSI driver. | |
3 | * | |
4 | * Copyright (c) 2008 Chelsio Communications, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation. | |
9 | * | |
10 | * Written by: Karen Xie (kxie@chelsio.com) | |
11 | */ | |
12 | ||
13 | #ifndef __CXGB3I_H__ | |
14 | #define __CXGB3I_H__ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/moduleparam.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/types.h> | |
20 | #include <linux/list.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/scatterlist.h> | |
949847d1 | 23 | #include <linux/skbuff.h> |
c3673464 KX |
24 | #include <scsi/libiscsi_tcp.h> |
25 | ||
26 | /* from cxgb3 LLD */ | |
27 | #include "common.h" | |
28 | #include "t3_cpl.h" | |
29 | #include "t3cdev.h" | |
30 | #include "cxgb3_ctl_defs.h" | |
31 | #include "cxgb3_offload.h" | |
32 | #include "firmware_exports.h" | |
33 | ||
34 | #include "cxgb3i_offload.h" | |
35 | #include "cxgb3i_ddp.h" | |
36 | ||
37 | #define CXGB3I_SCSI_QDEPTH_DFLT 128 | |
38 | #define CXGB3I_MAX_TARGET CXGB3I_MAX_CONN | |
39 | #define CXGB3I_MAX_LUN 512 | |
40 | #define ISCSI_PDU_NONPAYLOAD_MAX \ | |
41 | (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE) | |
42 | ||
43 | struct cxgb3i_adapter; | |
44 | struct cxgb3i_hba; | |
45 | struct cxgb3i_endpoint; | |
46 | ||
47 | /** | |
48 | * struct cxgb3i_hba - cxgb3i iscsi structure (per port) | |
49 | * | |
50 | * @snic: cxgb3i adapter containing this port | |
51 | * @ndev: pointer to netdev structure | |
52 | * @shost: pointer to scsi host structure | |
53 | */ | |
54 | struct cxgb3i_hba { | |
55 | struct cxgb3i_adapter *snic; | |
56 | struct net_device *ndev; | |
57 | struct Scsi_Host *shost; | |
58 | }; | |
59 | ||
60 | /** | |
61 | * struct cxgb3i_adapter - cxgb3i adapter structure (per pci) | |
62 | * | |
63 | * @listhead: list head to link elements | |
64 | * @lock: lock for this structure | |
65 | * @tdev: pointer to t3cdev used by cxgb3 driver | |
66 | * @pdev: pointer to pci dev | |
67 | * @hba_cnt: # of hbas (the same as # of ports) | |
68 | * @hba: all the hbas on this adapter | |
69 | * @tx_max_size: max. tx packet size supported | |
70 | * @rx_max_size: max. rx packet size supported | |
71 | * @tag_format: ddp tag format settings | |
72 | */ | |
73 | struct cxgb3i_adapter { | |
74 | struct list_head list_head; | |
75 | spinlock_t lock; | |
76 | struct t3cdev *tdev; | |
77 | struct pci_dev *pdev; | |
78 | unsigned char hba_cnt; | |
79 | struct cxgb3i_hba *hba[MAX_NPORTS]; | |
80 | ||
81 | unsigned int tx_max_size; | |
82 | unsigned int rx_max_size; | |
83 | ||
84 | struct cxgb3i_tag_format tag_format; | |
85 | }; | |
86 | ||
87 | /** | |
88 | * struct cxgb3i_conn - cxgb3i iscsi connection | |
89 | * | |
90 | * @listhead: list head to link elements | |
91 | * @cep: pointer to iscsi_endpoint structure | |
92 | * @conn: pointer to iscsi_conn structure | |
93 | * @hba: pointer to the hba this conn. is going through | |
94 | * @task_idx_bits: # of bits needed for session->cmds_max | |
95 | */ | |
96 | struct cxgb3i_conn { | |
97 | struct list_head list_head; | |
98 | struct cxgb3i_endpoint *cep; | |
99 | struct iscsi_conn *conn; | |
100 | struct cxgb3i_hba *hba; | |
101 | unsigned int task_idx_bits; | |
102 | }; | |
103 | ||
104 | /** | |
105 | * struct cxgb3i_endpoint - iscsi tcp endpoint | |
106 | * | |
107 | * @c3cn: the h/w tcp connection representation | |
108 | * @hba: pointer to the hba this conn. is going through | |
109 | * @cconn: pointer to the associated cxgb3i iscsi connection | |
110 | */ | |
111 | struct cxgb3i_endpoint { | |
112 | struct s3_conn *c3cn; | |
113 | struct cxgb3i_hba *hba; | |
114 | struct cxgb3i_conn *cconn; | |
115 | }; | |
116 | ||
949847d1 KX |
117 | /** |
118 | * struct cxgb3i_task_data - private iscsi task data | |
119 | * | |
120 | * @nr_frags: # of coalesced page frags (from scsi sgl) | |
121 | * @frags: coalesced page frags (from scsi sgl) | |
122 | * @skb: tx pdu skb | |
123 | * @offset: data offset for the next pdu | |
124 | * @count: max. possible pdu payload | |
125 | * @sgoffset: offset to the first sg entry for a given offset | |
126 | */ | |
127 | #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) | |
128 | struct cxgb3i_task_data { | |
129 | unsigned short nr_frags; | |
130 | skb_frag_t frags[MAX_PDU_FRAGS]; | |
131 | struct sk_buff *skb; | |
132 | unsigned int offset; | |
133 | unsigned int count; | |
134 | unsigned int sgoffset; | |
135 | }; | |
136 | ||
c3673464 KX |
137 | int cxgb3i_iscsi_init(void); |
138 | void cxgb3i_iscsi_cleanup(void); | |
139 | ||
140 | struct cxgb3i_adapter *cxgb3i_adapter_add(struct t3cdev *); | |
141 | void cxgb3i_adapter_remove(struct t3cdev *); | |
142 | int cxgb3i_adapter_ulp_init(struct cxgb3i_adapter *); | |
143 | void cxgb3i_adapter_ulp_cleanup(struct cxgb3i_adapter *); | |
144 | ||
145 | struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *); | |
146 | struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *, | |
147 | struct net_device *); | |
148 | void cxgb3i_hba_host_remove(struct cxgb3i_hba *); | |
149 | ||
150 | int cxgb3i_pdu_init(void); | |
151 | void cxgb3i_pdu_cleanup(void); | |
152 | void cxgb3i_conn_cleanup_task(struct iscsi_task *); | |
153 | int cxgb3i_conn_alloc_pdu(struct iscsi_task *, u8); | |
154 | int cxgb3i_conn_init_pdu(struct iscsi_task *, unsigned int, unsigned int); | |
155 | int cxgb3i_conn_xmit_pdu(struct iscsi_task *); | |
156 | ||
157 | void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt); | |
158 | int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt); | |
159 | ||
160 | #endif |