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aef9ec39 RD |
1 | /* |
2 | * Copyright (c) 2005 Cisco Systems. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | * $Id: ib_srp.h 3932 2005-11-01 17:19:29Z roland $ | |
33 | */ | |
34 | ||
35 | #ifndef IB_SRP_H | |
36 | #define IB_SRP_H | |
37 | ||
38 | #include <linux/types.h> | |
39 | #include <linux/list.h> | |
8e9e5f4f | 40 | #include <linux/mutex.h> |
cf368713 | 41 | #include <linux/scatterlist.h> |
aef9ec39 RD |
42 | |
43 | #include <scsi/scsi_host.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
45 | ||
46 | #include <rdma/ib_verbs.h> | |
47 | #include <rdma/ib_sa.h> | |
48 | #include <rdma/ib_cm.h> | |
f5358a17 | 49 | #include <rdma/ib_fmr_pool.h> |
aef9ec39 RD |
50 | |
51 | enum { | |
52 | SRP_PATH_REC_TIMEOUT_MS = 1000, | |
53 | SRP_ABORT_TIMEOUT_MS = 5000, | |
54 | ||
55 | SRP_PORT_REDIRECT = 1, | |
56 | SRP_DLID_REDIRECT = 2, | |
9fe4bcf4 | 57 | SRP_STALE_CONN = 3, |
aef9ec39 | 58 | |
5f068992 | 59 | SRP_MAX_LUN = 512, |
74b0a15b | 60 | SRP_DEF_SG_TABLESIZE = 12, |
aef9ec39 RD |
61 | |
62 | SRP_RQ_SHIFT = 6, | |
63 | SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, | |
64 | SRP_SQ_SIZE = SRP_RQ_SIZE - 1, | |
65 | SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE, | |
66 | ||
f5358a17 RD |
67 | SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), |
68 | ||
69 | SRP_FMR_SIZE = 256, | |
70 | SRP_FMR_POOL_SIZE = 1024, | |
71 | SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 | |
aef9ec39 RD |
72 | }; |
73 | ||
74 | #define SRP_OP_RECV (1 << 31) | |
aef9ec39 RD |
75 | |
76 | enum srp_target_state { | |
77 | SRP_TARGET_LIVE, | |
78 | SRP_TARGET_CONNECTING, | |
79 | SRP_TARGET_DEAD, | |
80 | SRP_TARGET_REMOVED | |
81 | }; | |
82 | ||
8cba2077 DD |
83 | enum srp_request_type { |
84 | SRP_REQ_NORMAL, | |
85 | SRP_REQ_TASK_MGMT, | |
86 | }; | |
87 | ||
f5358a17 RD |
88 | struct srp_device { |
89 | struct list_head dev_list; | |
aef9ec39 | 90 | struct ib_device *dev; |
aef9ec39 RD |
91 | struct ib_pd *pd; |
92 | struct ib_mr *mr; | |
f5358a17 RD |
93 | struct ib_fmr_pool *fmr_pool; |
94 | int fmr_page_shift; | |
95 | int fmr_page_size; | |
bf628dc2 | 96 | u64 fmr_page_mask; |
f5358a17 RD |
97 | }; |
98 | ||
99 | struct srp_host { | |
05321937 | 100 | struct srp_device *srp_dev; |
f5358a17 | 101 | u8 port; |
ee959b00 | 102 | struct device dev; |
aef9ec39 | 103 | struct list_head target_list; |
b3589fd4 | 104 | spinlock_t target_lock; |
aef9ec39 RD |
105 | struct completion released; |
106 | struct list_head list; | |
107 | }; | |
108 | ||
109 | struct srp_request { | |
110 | struct list_head list; | |
111 | struct scsi_cmnd *scmnd; | |
112 | struct srp_iu *cmd; | |
113 | struct srp_iu *tsk_mgmt; | |
f5358a17 | 114 | struct ib_pool_fmr *fmr; |
aef9ec39 | 115 | struct completion done; |
d945e1df | 116 | short index; |
aef9ec39 RD |
117 | u8 cmd_done; |
118 | u8 tsk_status; | |
119 | }; | |
120 | ||
121 | struct srp_target_port { | |
122 | __be64 id_ext; | |
123 | __be64 ioc_guid; | |
124 | __be64 service_id; | |
01cb9bcb | 125 | __be64 initiator_ext; |
0c0450db | 126 | u16 io_class; |
aef9ec39 RD |
127 | struct srp_host *srp_host; |
128 | struct Scsi_Host *scsi_host; | |
129 | char target_name[32]; | |
130 | unsigned int scsi_id; | |
131 | ||
132 | struct ib_sa_path_rec path; | |
3633b3d0 | 133 | __be16 orig_dgid[8]; |
aef9ec39 RD |
134 | struct ib_sa_query *path_query; |
135 | int path_query_id; | |
136 | ||
137 | struct ib_cm_id *cm_id; | |
138 | struct ib_cq *cq; | |
139 | struct ib_qp *qp; | |
140 | ||
141 | int max_ti_iu_len; | |
142 | s32 req_lim; | |
143 | ||
6bfa24fa RD |
144 | int zero_req_lim; |
145 | ||
aef9ec39 RD |
146 | unsigned rx_head; |
147 | struct srp_iu *rx_ring[SRP_RQ_SIZE]; | |
148 | ||
149 | unsigned tx_head; | |
150 | unsigned tx_tail; | |
151 | struct srp_iu *tx_ring[SRP_SQ_SIZE + 1]; | |
152 | ||
d945e1df | 153 | struct list_head free_reqs; |
aef9ec39 RD |
154 | struct list_head req_queue; |
155 | struct srp_request req_ring[SRP_SQ_SIZE]; | |
156 | ||
157 | struct work_struct work; | |
158 | ||
159 | struct list_head list; | |
160 | struct completion done; | |
161 | int status; | |
162 | enum srp_target_state state; | |
1033ff67 | 163 | int qp_in_error; |
aef9ec39 RD |
164 | }; |
165 | ||
166 | struct srp_iu { | |
85507bcc | 167 | u64 dma; |
aef9ec39 RD |
168 | void *buf; |
169 | size_t size; | |
170 | enum dma_data_direction direction; | |
171 | }; | |
172 | ||
173 | #endif /* IB_SRP_H */ |