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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 | |
63 | SRP_SQ_SIZE = SRP_RQ_SIZE, | |
dd5e6e38 BVA |
64 | SRP_RSP_SQ_SIZE = 1, |
65 | SRP_REQ_SQ_SIZE = SRP_SQ_SIZE - SRP_RSP_SQ_SIZE, | |
66 | SRP_TSK_MGMT_SQ_SIZE = 1, | |
67 | SRP_CMD_SQ_SIZE = SRP_REQ_SQ_SIZE - SRP_TSK_MGMT_SQ_SIZE, | |
aef9ec39 | 68 | |
f8b6e31e DD |
69 | SRP_TAG_NO_REQ = ~0U, |
70 | SRP_TAG_TSK_MGMT = 1U << 31, | |
f5358a17 RD |
71 | |
72 | SRP_FMR_SIZE = 256, | |
73 | SRP_FMR_POOL_SIZE = 1024, | |
8f26c9ff DD |
74 | SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4, |
75 | ||
76 | SRP_MAP_ALLOW_FMR = 0, | |
77 | SRP_MAP_NO_FMR = 1, | |
aef9ec39 RD |
78 | }; |
79 | ||
aef9ec39 RD |
80 | enum srp_target_state { |
81 | SRP_TARGET_LIVE, | |
82 | SRP_TARGET_CONNECTING, | |
83 | SRP_TARGET_DEAD, | |
84 | SRP_TARGET_REMOVED | |
85 | }; | |
86 | ||
bb12588a DD |
87 | enum srp_iu_type { |
88 | SRP_IU_CMD, | |
89 | SRP_IU_TSK_MGMT, | |
90 | SRP_IU_RSP, | |
8cba2077 DD |
91 | }; |
92 | ||
f5358a17 RD |
93 | struct srp_device { |
94 | struct list_head dev_list; | |
aef9ec39 | 95 | struct ib_device *dev; |
aef9ec39 RD |
96 | struct ib_pd *pd; |
97 | struct ib_mr *mr; | |
f5358a17 | 98 | struct ib_fmr_pool *fmr_pool; |
bf628dc2 | 99 | u64 fmr_page_mask; |
8f26c9ff DD |
100 | int fmr_page_size; |
101 | int fmr_max_size; | |
f5358a17 RD |
102 | }; |
103 | ||
104 | struct srp_host { | |
05321937 | 105 | struct srp_device *srp_dev; |
f5358a17 | 106 | u8 port; |
ee959b00 | 107 | struct device dev; |
aef9ec39 | 108 | struct list_head target_list; |
b3589fd4 | 109 | spinlock_t target_lock; |
aef9ec39 RD |
110 | struct completion released; |
111 | struct list_head list; | |
112 | }; | |
113 | ||
114 | struct srp_request { | |
115 | struct list_head list; | |
116 | struct scsi_cmnd *scmnd; | |
117 | struct srp_iu *cmd; | |
8f26c9ff DD |
118 | struct ib_pool_fmr **fmr_list; |
119 | u64 *map_page; | |
120 | short nfmr; | |
d945e1df | 121 | short index; |
aef9ec39 RD |
122 | }; |
123 | ||
124 | struct srp_target_port { | |
9af76271 DD |
125 | /* These are RW in the hot path, and commonly used together */ |
126 | struct list_head free_tx; | |
127 | struct list_head free_reqs; | |
128 | spinlock_t lock; | |
129 | s32 req_lim; | |
130 | ||
131 | /* These are read-only in the hot path */ | |
132 | struct ib_cq *send_cq ____cacheline_aligned_in_smp; | |
133 | struct ib_cq *recv_cq; | |
134 | struct ib_qp *qp; | |
135 | u32 lkey; | |
136 | u32 rkey; | |
137 | enum srp_target_state state; | |
49248644 DD |
138 | unsigned int max_iu_len; |
139 | unsigned int cmd_sg_cnt; | |
9af76271 DD |
140 | |
141 | /* Everything above this point is used in the hot path of | |
142 | * command processing. Try to keep them packed into cachelines. | |
143 | */ | |
144 | ||
aef9ec39 RD |
145 | __be64 id_ext; |
146 | __be64 ioc_guid; | |
147 | __be64 service_id; | |
01cb9bcb | 148 | __be64 initiator_ext; |
0c0450db | 149 | u16 io_class; |
aef9ec39 RD |
150 | struct srp_host *srp_host; |
151 | struct Scsi_Host *scsi_host; | |
152 | char target_name[32]; | |
153 | unsigned int scsi_id; | |
154 | ||
155 | struct ib_sa_path_rec path; | |
3633b3d0 | 156 | __be16 orig_dgid[8]; |
aef9ec39 RD |
157 | struct ib_sa_query *path_query; |
158 | int path_query_id; | |
159 | ||
160 | struct ib_cm_id *cm_id; | |
aef9ec39 RD |
161 | |
162 | int max_ti_iu_len; | |
aef9ec39 | 163 | |
6bfa24fa RD |
164 | int zero_req_lim; |
165 | ||
dd5e6e38 | 166 | struct srp_iu *tx_ring[SRP_SQ_SIZE]; |
9af76271 | 167 | struct srp_iu *rx_ring[SRP_RQ_SIZE]; |
dd5e6e38 | 168 | struct srp_request req_ring[SRP_CMD_SQ_SIZE]; |
aef9ec39 RD |
169 | |
170 | struct work_struct work; | |
171 | ||
172 | struct list_head list; | |
173 | struct completion done; | |
174 | int status; | |
1033ff67 | 175 | int qp_in_error; |
f8b6e31e DD |
176 | |
177 | struct completion tsk_mgmt_done; | |
178 | u8 tsk_mgmt_status; | |
aef9ec39 RD |
179 | }; |
180 | ||
181 | struct srp_iu { | |
dcb4cb85 | 182 | struct list_head list; |
85507bcc | 183 | u64 dma; |
aef9ec39 RD |
184 | void *buf; |
185 | size_t size; | |
186 | enum dma_data_direction direction; | |
187 | }; | |
188 | ||
8f26c9ff DD |
189 | struct srp_map_state { |
190 | struct ib_pool_fmr **next_fmr; | |
191 | struct srp_direct_buf *desc; | |
192 | u64 *pages; | |
193 | dma_addr_t base_dma_addr; | |
194 | u32 fmr_len; | |
195 | u32 total_len; | |
196 | unsigned int npages; | |
197 | unsigned int nfmr; | |
198 | unsigned int ndesc; | |
199 | struct scatterlist *unmapped_sg; | |
200 | int unmapped_index; | |
201 | dma_addr_t unmapped_addr; | |
202 | }; | |
203 | ||
aef9ec39 | 204 | #endif /* IB_SRP_H */ |