2 * Copyright (c) 2005 Cisco Systems. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
36 #include <linux/types.h>
37 #include <linux/list.h>
38 #include <linux/mutex.h>
39 #include <linux/scatterlist.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_cmnd.h>
44 #include <rdma/ib_verbs.h>
45 #include <rdma/ib_sa.h>
46 #include <rdma/ib_cm.h>
47 #include <rdma/ib_fmr_pool.h>
50 SRP_PATH_REC_TIMEOUT_MS
= 1000,
51 SRP_ABORT_TIMEOUT_MS
= 5000,
53 SRP_PORT_REDIRECT
= 1,
54 SRP_DLID_REDIRECT
= 2,
58 SRP_DEF_SG_TABLESIZE
= 12,
61 SRP_RQ_SIZE
= 1 << SRP_RQ_SHIFT
,
63 SRP_SQ_SIZE
= SRP_RQ_SIZE
,
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
,
70 SRP_TAG_TSK_MGMT
= 1U << 31,
73 SRP_FMR_MIN_SIZE
= 128,
74 SRP_FMR_POOL_SIZE
= 1024,
75 SRP_FMR_DIRTY_SIZE
= SRP_FMR_POOL_SIZE
/ 4,
77 SRP_MAP_ALLOW_FMR
= 0,
81 enum srp_target_state
{
93 struct list_head dev_list
;
94 struct ib_device
*dev
;
97 struct ib_fmr_pool
*fmr_pool
;
104 struct srp_device
*srp_dev
;
107 struct list_head target_list
;
108 spinlock_t target_lock
;
109 struct completion released
;
110 struct list_head list
;
114 struct list_head list
;
115 struct scsi_cmnd
*scmnd
;
117 struct ib_pool_fmr
**fmr_list
;
119 struct srp_direct_buf
*indirect_desc
;
120 dma_addr_t indirect_dma_addr
;
125 struct srp_target_port
{
126 /* These are RW in the hot path, and commonly used together */
127 struct list_head free_tx
;
128 struct list_head free_reqs
;
132 /* These are read-only in the hot path */
133 struct ib_cq
*send_cq ____cacheline_aligned_in_smp
;
134 struct ib_cq
*recv_cq
;
138 enum srp_target_state state
;
139 unsigned int max_iu_len
;
140 unsigned int cmd_sg_cnt
;
141 unsigned int indirect_size
;
143 bool transport_offline
;
145 /* Everything above this point is used in the hot path of
146 * command processing. Try to keep them packed into cachelines.
152 __be64 initiator_ext
;
154 struct srp_host
*srp_host
;
155 struct Scsi_Host
*scsi_host
;
156 char target_name
[32];
157 unsigned int scsi_id
;
158 unsigned int sg_tablesize
;
161 struct ib_sa_path_rec path
;
163 struct ib_sa_query
*path_query
;
169 struct ib_cm_id
*cm_id
;
175 struct srp_iu
*tx_ring
[SRP_SQ_SIZE
];
176 struct srp_iu
*rx_ring
[SRP_RQ_SIZE
];
177 struct srp_request req_ring
[SRP_CMD_SQ_SIZE
];
179 struct work_struct remove_work
;
181 struct list_head list
;
182 struct completion done
;
186 struct completion tsk_mgmt_done
;
191 struct list_head list
;
195 enum dma_data_direction direction
;
198 struct srp_map_state
{
199 struct ib_pool_fmr
**next_fmr
;
200 struct srp_direct_buf
*desc
;
202 dma_addr_t base_dma_addr
;
208 struct scatterlist
*unmapped_sg
;
210 dma_addr_t unmapped_addr
;
213 #endif /* IB_SRP_H */