blob: 67e17c336a50d130f768dd0201740f114ed77362 [file] [log] [blame]
Roland Dreieraef9ec32005-11-02 14:07:13 -08001/*
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>
Ingo Molnar8e9e5f4f2006-01-30 15:21:21 -080040#include <linux/mutex.h>
Roland Dreiercf368712006-03-24 15:47:26 -080041#include <linux/scatterlist.h>
Roland Dreieraef9ec32005-11-02 14:07:13 -080042
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>
Roland Dreierf5358a12006-06-17 20:37:29 -070049#include <rdma/ib_fmr_pool.h>
Roland Dreieraef9ec32005-11-02 14:07:13 -080050
51enum {
52 SRP_PATH_REC_TIMEOUT_MS = 1000,
53 SRP_ABORT_TIMEOUT_MS = 5000,
54
55 SRP_PORT_REDIRECT = 1,
56 SRP_DLID_REDIRECT = 2,
David Dillow9fe4bcf2008-01-08 17:08:52 -050057 SRP_STALE_CONN = 3,
Roland Dreieraef9ec32005-11-02 14:07:13 -080058
Roland Dreier5f068992005-11-11 14:06:01 -080059 SRP_MAX_LUN = 512,
Vu Pham74b0a152006-06-17 20:37:32 -070060 SRP_DEF_SG_TABLESIZE = 12,
Roland Dreieraef9ec32005-11-02 14:07:13 -080061
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
Roland Dreierf5358a12006-06-17 20:37:29 -070067 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
Roland Dreieraef9ec32005-11-02 14:07:13 -080072};
73
74#define SRP_OP_RECV (1 << 31)
Roland Dreieraef9ec32005-11-02 14:07:13 -080075
76enum srp_target_state {
77 SRP_TARGET_LIVE,
78 SRP_TARGET_CONNECTING,
79 SRP_TARGET_DEAD,
80 SRP_TARGET_REMOVED
81};
82
David Dillow8cba2072007-12-19 17:08:43 -050083enum srp_request_type {
84 SRP_REQ_NORMAL,
85 SRP_REQ_TASK_MGMT,
86};
87
Roland Dreierf5358a12006-06-17 20:37:29 -070088struct srp_device {
89 struct list_head dev_list;
Roland Dreieraef9ec32005-11-02 14:07:13 -080090 struct ib_device *dev;
Roland Dreieraef9ec32005-11-02 14:07:13 -080091 struct ib_pd *pd;
92 struct ib_mr *mr;
Roland Dreierf5358a12006-06-17 20:37:29 -070093 struct ib_fmr_pool *fmr_pool;
94 int fmr_page_shift;
95 int fmr_page_size;
Roland Dreierbf628dc2006-12-15 14:01:49 -080096 u64 fmr_page_mask;
Roland Dreierf5358a12006-06-17 20:37:29 -070097};
98
99struct srp_host {
Greg Kroah-Hartman05321932008-03-06 00:13:36 +0100100 struct srp_device *srp_dev;
Roland Dreierf5358a12006-06-17 20:37:29 -0700101 u8 port;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800102 struct class_device class_dev;
103 struct list_head target_list;
Matthew Wilcoxb3589fd2006-06-17 20:37:30 -0700104 spinlock_t target_lock;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800105 struct completion released;
106 struct list_head list;
107};
108
109struct srp_request {
110 struct list_head list;
111 struct scsi_cmnd *scmnd;
112 struct srp_iu *cmd;
113 struct srp_iu *tsk_mgmt;
Roland Dreierf5358a12006-06-17 20:37:29 -0700114 struct ib_pool_fmr *fmr;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800115 struct completion done;
Roland Dreierd945e1d2006-05-09 10:50:28 -0700116 short index;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800117 u8 cmd_done;
118 u8 tsk_status;
119};
120
121struct srp_target_port {
122 __be64 id_ext;
123 __be64 ioc_guid;
124 __be64 service_id;
Ishai Rabinovitz01cb9bc2006-10-04 15:28:56 +0200125 __be64 initiator_ext;
Ramachandra K0c0450db2006-06-17 20:37:38 -0700126 u16 io_class;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800127 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;
Ishai Rabinovitz3633b3d2007-05-06 21:18:11 -0700133 __be16 orig_dgid[8];
Roland Dreieraef9ec32005-11-02 14:07:13 -0800134 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
Roland Dreier6bfa24f2006-06-17 20:37:33 -0700144 int zero_req_lim;
145
Roland Dreieraef9ec32005-11-02 14:07:13 -0800146 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
Roland Dreierd945e1d2006-05-09 10:50:28 -0700153 struct list_head free_reqs;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800154 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;
Ishai Rabinovitz1033ff62007-01-16 17:26:22 +0200163 int qp_in_error;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800164};
165
166struct srp_iu {
Ralph Campbell85507bc2006-12-12 14:30:55 -0800167 u64 dma;
Roland Dreieraef9ec32005-11-02 14:07:13 -0800168 void *buf;
169 size_t size;
170 enum dma_data_direction direction;
171};
172
173#endif /* IB_SRP_H */