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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. | |
aef9ec39 RD |
31 | */ |
32 | ||
33 | #ifndef IB_SRP_H | |
34 | #define IB_SRP_H | |
35 | ||
36 | #include <linux/types.h> | |
37 | #include <linux/list.h> | |
8e9e5f4f | 38 | #include <linux/mutex.h> |
cf368713 | 39 | #include <linux/scatterlist.h> |
aef9ec39 RD |
40 | |
41 | #include <scsi/scsi_host.h> | |
42 | #include <scsi/scsi_cmnd.h> | |
43 | ||
44 | #include <rdma/ib_verbs.h> | |
45 | #include <rdma/ib_sa.h> | |
46 | #include <rdma/ib_cm.h> | |
f5358a17 | 47 | #include <rdma/ib_fmr_pool.h> |
aef9ec39 RD |
48 | |
49 | enum { | |
50 | SRP_PATH_REC_TIMEOUT_MS = 1000, | |
51 | SRP_ABORT_TIMEOUT_MS = 5000, | |
52 | ||
53 | SRP_PORT_REDIRECT = 1, | |
54 | SRP_DLID_REDIRECT = 2, | |
9fe4bcf4 | 55 | SRP_STALE_CONN = 3, |
aef9ec39 | 56 | |
5f068992 | 57 | SRP_MAX_LUN = 512, |
74b0a15b | 58 | SRP_DEF_SG_TABLESIZE = 12, |
aef9ec39 RD |
59 | |
60 | SRP_RQ_SHIFT = 6, | |
61 | SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, | |
dd5e6e38 BVA |
62 | SRP_RQ_MASK = SRP_RQ_SIZE - 1, |
63 | ||
64 | SRP_SQ_SIZE = SRP_RQ_SIZE, | |
65 | SRP_SQ_MASK = SRP_SQ_SIZE - 1, | |
66 | SRP_RSP_SQ_SIZE = 1, | |
67 | SRP_REQ_SQ_SIZE = SRP_SQ_SIZE - SRP_RSP_SQ_SIZE, | |
68 | SRP_TSK_MGMT_SQ_SIZE = 1, | |
69 | SRP_CMD_SQ_SIZE = SRP_REQ_SQ_SIZE - SRP_TSK_MGMT_SQ_SIZE, | |
aef9ec39 | 70 | |
f5358a17 RD |
71 | SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), |
72 | ||
73 | SRP_FMR_SIZE = 256, | |
74 | SRP_FMR_POOL_SIZE = 1024, | |
75 | SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 | |
aef9ec39 RD |
76 | }; |
77 | ||
aef9ec39 RD |
78 | enum srp_target_state { |
79 | SRP_TARGET_LIVE, | |
80 | SRP_TARGET_CONNECTING, | |
81 | SRP_TARGET_DEAD, | |
82 | SRP_TARGET_REMOVED | |
83 | }; | |
84 | ||
bb12588a DD |
85 | enum srp_iu_type { |
86 | SRP_IU_CMD, | |
87 | SRP_IU_TSK_MGMT, | |
88 | SRP_IU_RSP, | |
8cba2077 DD |
89 | }; |
90 | ||
f5358a17 RD |
91 | struct srp_device { |
92 | struct list_head dev_list; | |
aef9ec39 | 93 | struct ib_device *dev; |
aef9ec39 RD |
94 | struct ib_pd *pd; |
95 | struct ib_mr *mr; | |
f5358a17 RD |
96 | struct ib_fmr_pool *fmr_pool; |
97 | int fmr_page_shift; | |
98 | int fmr_page_size; | |
bf628dc2 | 99 | u64 fmr_page_mask; |
f5358a17 RD |
100 | }; |
101 | ||
102 | struct srp_host { | |
05321937 | 103 | struct srp_device *srp_dev; |
f5358a17 | 104 | u8 port; |
ee959b00 | 105 | struct device dev; |
aef9ec39 | 106 | struct list_head target_list; |
b3589fd4 | 107 | spinlock_t target_lock; |
aef9ec39 RD |
108 | struct completion released; |
109 | struct list_head list; | |
110 | }; | |
111 | ||
112 | struct srp_request { | |
113 | struct list_head list; | |
114 | struct scsi_cmnd *scmnd; | |
115 | struct srp_iu *cmd; | |
116 | struct srp_iu *tsk_mgmt; | |
f5358a17 | 117 | struct ib_pool_fmr *fmr; |
aef9ec39 | 118 | struct completion done; |
d945e1df | 119 | short index; |
aef9ec39 RD |
120 | u8 cmd_done; |
121 | u8 tsk_status; | |
122 | }; | |
123 | ||
124 | struct srp_target_port { | |
125 | __be64 id_ext; | |
126 | __be64 ioc_guid; | |
127 | __be64 service_id; | |
01cb9bcb | 128 | __be64 initiator_ext; |
0c0450db | 129 | u16 io_class; |
aef9ec39 RD |
130 | struct srp_host *srp_host; |
131 | struct Scsi_Host *scsi_host; | |
132 | char target_name[32]; | |
133 | unsigned int scsi_id; | |
134 | ||
135 | struct ib_sa_path_rec path; | |
3633b3d0 | 136 | __be16 orig_dgid[8]; |
aef9ec39 RD |
137 | struct ib_sa_query *path_query; |
138 | int path_query_id; | |
139 | ||
140 | struct ib_cm_id *cm_id; | |
9c03dc9f BVA |
141 | struct ib_cq *recv_cq; |
142 | struct ib_cq *send_cq; | |
aef9ec39 RD |
143 | struct ib_qp *qp; |
144 | ||
145 | int max_ti_iu_len; | |
146 | s32 req_lim; | |
147 | ||
6bfa24fa RD |
148 | int zero_req_lim; |
149 | ||
aef9ec39 RD |
150 | unsigned rx_head; |
151 | struct srp_iu *rx_ring[SRP_RQ_SIZE]; | |
152 | ||
153 | unsigned tx_head; | |
154 | unsigned tx_tail; | |
dd5e6e38 | 155 | struct srp_iu *tx_ring[SRP_SQ_SIZE]; |
aef9ec39 | 156 | |
d945e1df | 157 | struct list_head free_reqs; |
aef9ec39 | 158 | struct list_head req_queue; |
dd5e6e38 | 159 | struct srp_request req_ring[SRP_CMD_SQ_SIZE]; |
aef9ec39 RD |
160 | |
161 | struct work_struct work; | |
162 | ||
163 | struct list_head list; | |
164 | struct completion done; | |
165 | int status; | |
166 | enum srp_target_state state; | |
1033ff67 | 167 | int qp_in_error; |
aef9ec39 RD |
168 | }; |
169 | ||
170 | struct srp_iu { | |
85507bcc | 171 | u64 dma; |
aef9ec39 RD |
172 | void *buf; |
173 | size_t size; | |
174 | enum dma_data_direction direction; | |
bb12588a | 175 | enum srp_iu_type type; |
aef9ec39 RD |
176 | }; |
177 | ||
178 | #endif /* IB_SRP_H */ |