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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, | |
57 | ||
5f068992 | 58 | SRP_MAX_LUN = 512, |
74b0a15b | 59 | SRP_DEF_SG_TABLESIZE = 12, |
aef9ec39 RD |
60 | |
61 | SRP_RQ_SHIFT = 6, | |
62 | SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, | |
63 | SRP_SQ_SIZE = SRP_RQ_SIZE - 1, | |
64 | SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE, | |
65 | ||
f5358a17 RD |
66 | SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), |
67 | ||
68 | SRP_FMR_SIZE = 256, | |
69 | SRP_FMR_POOL_SIZE = 1024, | |
70 | SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 | |
aef9ec39 RD |
71 | }; |
72 | ||
73 | #define SRP_OP_RECV (1 << 31) | |
aef9ec39 RD |
74 | |
75 | enum srp_target_state { | |
76 | SRP_TARGET_LIVE, | |
77 | SRP_TARGET_CONNECTING, | |
78 | SRP_TARGET_DEAD, | |
79 | SRP_TARGET_REMOVED | |
80 | }; | |
81 | ||
f5358a17 RD |
82 | struct srp_device { |
83 | struct list_head dev_list; | |
aef9ec39 | 84 | struct ib_device *dev; |
aef9ec39 RD |
85 | struct ib_pd *pd; |
86 | struct ib_mr *mr; | |
f5358a17 RD |
87 | struct ib_fmr_pool *fmr_pool; |
88 | int fmr_page_shift; | |
89 | int fmr_page_size; | |
90 | unsigned long fmr_page_mask; | |
91 | }; | |
92 | ||
93 | struct srp_host { | |
94 | u8 initiator_port_id[16]; | |
95 | struct srp_device *dev; | |
96 | u8 port; | |
aef9ec39 RD |
97 | struct class_device class_dev; |
98 | struct list_head target_list; | |
b3589fd4 | 99 | spinlock_t target_lock; |
aef9ec39 RD |
100 | struct completion released; |
101 | struct list_head list; | |
102 | }; | |
103 | ||
104 | struct srp_request { | |
105 | struct list_head list; | |
106 | struct scsi_cmnd *scmnd; | |
107 | struct srp_iu *cmd; | |
108 | struct srp_iu *tsk_mgmt; | |
f5358a17 | 109 | struct ib_pool_fmr *fmr; |
cf368713 RD |
110 | /* |
111 | * Fake scatterlist used when scmnd->use_sg==0. Can be killed | |
112 | * when the SCSI midlayer no longer generates non-SG commands. | |
113 | */ | |
114 | struct scatterlist fake_sg; | |
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; | |
125 | struct srp_host *srp_host; | |
126 | struct Scsi_Host *scsi_host; | |
127 | char target_name[32]; | |
128 | unsigned int scsi_id; | |
129 | ||
130 | struct ib_sa_path_rec path; | |
131 | struct ib_sa_query *path_query; | |
132 | int path_query_id; | |
133 | ||
134 | struct ib_cm_id *cm_id; | |
135 | struct ib_cq *cq; | |
136 | struct ib_qp *qp; | |
137 | ||
138 | int max_ti_iu_len; | |
139 | s32 req_lim; | |
140 | ||
6bfa24fa RD |
141 | int zero_req_lim; |
142 | ||
aef9ec39 RD |
143 | unsigned rx_head; |
144 | struct srp_iu *rx_ring[SRP_RQ_SIZE]; | |
145 | ||
146 | unsigned tx_head; | |
147 | unsigned tx_tail; | |
148 | struct srp_iu *tx_ring[SRP_SQ_SIZE + 1]; | |
149 | ||
d945e1df | 150 | struct list_head free_reqs; |
aef9ec39 RD |
151 | struct list_head req_queue; |
152 | struct srp_request req_ring[SRP_SQ_SIZE]; | |
153 | ||
154 | struct work_struct work; | |
155 | ||
156 | struct list_head list; | |
157 | struct completion done; | |
158 | int status; | |
159 | enum srp_target_state state; | |
160 | }; | |
161 | ||
162 | struct srp_iu { | |
163 | dma_addr_t dma; | |
164 | void *buf; | |
165 | size_t size; | |
166 | enum dma_data_direction direction; | |
167 | }; | |
168 | ||
169 | #endif /* IB_SRP_H */ |