1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33#ifndef IB_SRP_H
34#define IB_SRP_H
35
36#include <linux/types.h>
37#include <linux/list.h>
38#include <linux/mutex.h>
39#include <linux/scatterlist.h>
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>
47#include <rdma/ib_fmr_pool.h>
48
49enum {
50 SRP_PATH_REC_TIMEOUT_MS = 1000,
51 SRP_ABORT_TIMEOUT_MS = 5000,
52
53 SRP_PORT_REDIRECT = 1,
54 SRP_DLID_REDIRECT = 2,
55 SRP_STALE_CONN = 3,
56
57 SRP_MAX_LUN = 512,
58 SRP_DEF_SG_TABLESIZE = 12,
59
60 SRP_RQ_SHIFT = 6,
61 SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT,
62
63 SRP_SQ_SIZE = SRP_RQ_SIZE,
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,
68
69 SRP_TAG_NO_REQ = ~0U,
70 SRP_TAG_TSK_MGMT = 1U << 31,
71
72 SRP_FMR_SIZE = 512,
73 SRP_FMR_MIN_SIZE = 128,
74 SRP_FMR_POOL_SIZE = 1024,
75 SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4,
76
77 SRP_MAP_ALLOW_FMR = 0,
78 SRP_MAP_NO_FMR = 1,
79};
80
81enum srp_target_state {
82 SRP_TARGET_LIVE,
83 SRP_TARGET_CONNECTING,
84 SRP_TARGET_DEAD,
85 SRP_TARGET_REMOVED
86};
87
88enum srp_iu_type {
89 SRP_IU_CMD,
90 SRP_IU_TSK_MGMT,
91 SRP_IU_RSP,
92};
93
94struct srp_device {
95 struct list_head dev_list;
96 struct ib_device *dev;
97 struct ib_pd *pd;
98 struct ib_mr *mr;
99 struct ib_fmr_pool *fmr_pool;
100 u64 fmr_page_mask;
101 int fmr_page_size;
102 int fmr_max_size;
103};
104
105struct srp_host {
106 struct srp_device *srp_dev;
107 u8 port;
108 struct device dev;
109 struct list_head target_list;
110 spinlock_t target_lock;
111 struct completion released;
112 struct list_head list;
113};
114
115struct srp_request {
116 struct list_head list;
117 struct scsi_cmnd *scmnd;
118 struct srp_iu *cmd;
119 struct ib_pool_fmr **fmr_list;
120 u64 *map_page;
121 struct srp_direct_buf *indirect_desc;
122 dma_addr_t indirect_dma_addr;
123 short nfmr;
124 short index;
125};
126
127struct srp_target_port {
128
129 struct list_head free_tx;
130 struct list_head free_reqs;
131 spinlock_t lock;
132 s32 req_lim;
133
134
135 struct ib_cq *send_cq ____cacheline_aligned_in_smp;
136 struct ib_cq *recv_cq;
137 struct ib_qp *qp;
138 u32 lkey;
139 u32 rkey;
140 enum srp_target_state state;
141 unsigned int max_iu_len;
142 unsigned int cmd_sg_cnt;
143 unsigned int indirect_size;
144 bool allow_ext_sg;
145
146
147
148
149
150 __be64 id_ext;
151 __be64 ioc_guid;
152 __be64 service_id;
153 __be64 initiator_ext;
154 u16 io_class;
155 struct srp_host *srp_host;
156 struct Scsi_Host *scsi_host;
157 char target_name[32];
158 unsigned int scsi_id;
159 unsigned int sg_tablesize;
160
161 struct ib_sa_path_rec path;
162 __be16 orig_dgid[8];
163 struct ib_sa_query *path_query;
164 int path_query_id;
165
166 struct ib_cm_id *cm_id;
167
168 int max_ti_iu_len;
169
170 int zero_req_lim;
171
172 struct srp_iu *tx_ring[SRP_SQ_SIZE];
173 struct srp_iu *rx_ring[SRP_RQ_SIZE];
174 struct srp_request req_ring[SRP_CMD_SQ_SIZE];
175
176 struct work_struct work;
177
178 struct list_head list;
179 struct completion done;
180 int status;
181 int qp_in_error;
182
183 struct completion tsk_mgmt_done;
184 u8 tsk_mgmt_status;
185};
186
187struct srp_iu {
188 struct list_head list;
189 u64 dma;
190 void *buf;
191 size_t size;
192 enum dma_data_direction direction;
193};
194
195struct srp_map_state {
196 struct ib_pool_fmr **next_fmr;
197 struct srp_direct_buf *desc;
198 u64 *pages;
199 dma_addr_t base_dma_addr;
200 u32 fmr_len;
201 u32 total_len;
202 unsigned int npages;
203 unsigned int nfmr;
204 unsigned int ndesc;
205 struct scatterlist *unmapped_sg;
206 int unmapped_index;
207 dma_addr_t unmapped_addr;
208};
209
210#endif
211
