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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_DEFAULT_QUEUE_SIZE = 1 << 6,
61 SRP_RSP_SQ_SIZE = 1,
62 SRP_TSK_MGMT_SQ_SIZE = 1,
63 SRP_DEFAULT_CMD_SQ_SIZE = SRP_DEFAULT_QUEUE_SIZE - SRP_RSP_SQ_SIZE -
64 SRP_TSK_MGMT_SQ_SIZE,
65
66 SRP_TAG_NO_REQ = ~0U,
67 SRP_TAG_TSK_MGMT = 1U << 31,
68
69 SRP_FMR_SIZE = 512,
70 SRP_FMR_MIN_SIZE = 128,
71 SRP_FMR_POOL_SIZE = 1024,
72 SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4,
73
74 SRP_MAP_ALLOW_FMR = 0,
75 SRP_MAP_NO_FMR = 1,
76};
77
78enum srp_target_state {
79 SRP_TARGET_LIVE,
80 SRP_TARGET_REMOVED,
81};
82
83enum srp_iu_type {
84 SRP_IU_CMD,
85 SRP_IU_TSK_MGMT,
86 SRP_IU_RSP,
87};
88
89struct srp_device {
90 struct list_head dev_list;
91 struct ib_device *dev;
92 struct ib_pd *pd;
93 struct ib_mr *mr;
94 struct ib_fmr_pool *fmr_pool;
95 u64 fmr_page_mask;
96 int fmr_page_size;
97 int fmr_max_size;
98};
99
100struct srp_host {
101 struct srp_device *srp_dev;
102 u8 port;
103 struct device dev;
104 struct list_head target_list;
105 spinlock_t target_lock;
106 struct completion released;
107 struct list_head list;
108};
109
110struct srp_request {
111 struct list_head list;
112 struct scsi_cmnd *scmnd;
113 struct srp_iu *cmd;
114 struct ib_pool_fmr **fmr_list;
115 u64 *map_page;
116 struct srp_direct_buf *indirect_desc;
117 dma_addr_t indirect_dma_addr;
118 short nfmr;
119 short index;
120};
121
122struct srp_target_port {
123
124 struct list_head free_tx;
125 struct list_head free_reqs;
126 spinlock_t lock;
127 s32 req_lim;
128
129
130 struct ib_cq *send_cq ____cacheline_aligned_in_smp;
131 struct ib_cq *recv_cq;
132 struct ib_qp *qp;
133 u32 lkey;
134 u32 rkey;
135 enum srp_target_state state;
136 unsigned int max_iu_len;
137 unsigned int cmd_sg_cnt;
138 unsigned int indirect_size;
139 bool allow_ext_sg;
140
141
142
143
144
145 __be64 id_ext;
146 __be64 ioc_guid;
147 __be64 service_id;
148 __be64 initiator_ext;
149 u16 io_class;
150 struct srp_host *srp_host;
151 struct Scsi_Host *scsi_host;
152 struct srp_rport *rport;
153 char target_name[32];
154 unsigned int scsi_id;
155 unsigned int sg_tablesize;
156 int queue_size;
157 int req_ring_size;
158 int comp_vector;
159 int tl_retry_count;
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 u32 rq_tmo_jiffies;
167 bool connected;
168
169 struct ib_cm_id *cm_id;
170
171 int max_ti_iu_len;
172
173 int zero_req_lim;
174
175 struct srp_iu **tx_ring;
176 struct srp_iu **rx_ring;
177 struct srp_request *req_ring;
178
179 struct work_struct tl_err_work;
180 struct work_struct remove_work;
181
182 struct list_head list;
183 struct completion done;
184 int status;
185 bool qp_in_error;
186
187 struct completion tsk_mgmt_done;
188 u8 tsk_mgmt_status;
189};
190
191struct srp_iu {
192 struct list_head list;
193 u64 dma;
194 void *buf;
195 size_t size;
196 enum dma_data_direction direction;
197};
198
199struct srp_map_state {
200 struct ib_pool_fmr **next_fmr;
201 struct srp_direct_buf *desc;
202 u64 *pages;
203 dma_addr_t base_dma_addr;
204 u32 fmr_len;
205 u32 total_len;
206 unsigned int npages;
207 unsigned int nfmr;
208 unsigned int ndesc;
209 struct scatterlist *unmapped_sg;
210 int unmapped_index;
211 dma_addr_t unmapped_addr;
212};
213
214#endif
215
