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39 * Structures and constants for the SCSI RDMA Protocol (SRP) as
40 * defined by the INCITS T10 committee. This file was written using
41 * draft Revision 16a of the SRP standard.
44 #include <linux/types.h>
62 SRP_BUF_FORMAT_DIRECT = 1 << 1,
63 SRP_BUF_FORMAT_INDIRECT = 1 << 2
68 SRP_DATA_DESC_DIRECT = 1,
69 SRP_DATA_DESC_INDIRECT = 2
73 SRP_TSK_ABORT_TASK = 0x01,
74 SRP_TSK_ABORT_TASK_SET = 0x02,
75 SRP_TSK_CLEAR_TASK_SET = 0x04,
76 SRP_TSK_LUN_RESET = 0x08,
77 SRP_TSK_CLEAR_ACA = 0x40
80 enum srp_login_rej_reason {
81 SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
82 SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
83 SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
84 SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
85 SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
86 SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
87 SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
90 struct srp_direct_buf {
97 * We need the packed attribute because the SRP spec puts the list of
98 * descriptors at an offset of 20, which is not aligned to the size of
99 * struct srp_direct_buf. The whole structure must be packed to avoid
100 * having the 20-byte structure padded to 24 bytes on 64-bit architectures.
102 struct srp_indirect_buf {
103 struct srp_direct_buf table_desc;
105 struct srp_direct_buf desc_list[0];
106 } __attribute__((packed));
109 SRP_MULTICHAN_SINGLE = 0,
110 SRP_MULTICHAN_MULTI = 1
113 struct srp_login_req {
117 __be32 req_it_iu_len;
122 u8 initiator_port_id[16];
123 u8 target_port_id[16];
127 * The SRP spec defines the size of the LOGIN_RSP structure to be 52
128 * bytes, so it needs to be packed to avoid having it padded to 56
129 * bytes on 64-bit architectures.
131 struct srp_login_rsp {
134 __be32 req_lim_delta;
136 __be32 max_it_iu_len;
137 __be32 max_ti_iu_len;
141 } __attribute__((packed));
143 struct srp_login_rej {
153 struct srp_i_logout {
159 struct srp_t_logout {
168 * We need the packed attribute because the SRP spec only aligns the
169 * 8-byte LUN field to 4 bytes.
171 struct srp_tsk_mgmt {
177 __be64 lun __attribute__((packed));
186 * We need the packed attribute because the SRP spec only aligns the
187 * 8-byte LUN field to 4 bytes.
194 u8 data_out_desc_cnt;
198 __be64 lun __attribute__((packed));
208 SRP_RSP_FLAG_RSPVALID = 1 << 0,
209 SRP_RSP_FLAG_SNSVALID = 1 << 1,
210 SRP_RSP_FLAG_DOOVER = 1 << 2,
211 SRP_RSP_FLAG_DOUNDER = 1 << 3,
212 SRP_RSP_FLAG_DIOVER = 1 << 4,
213 SRP_RSP_FLAG_DIUNDER = 1 << 5
217 * The SRP spec defines the size of the RSP structure to be 36 bytes,
218 * so it needs to be packed to avoid having it padded to 40 bytes on
219 * 64-bit architectures.
225 __be32 req_lim_delta;
230 __be32 data_out_res_cnt;
231 __be32 data_in_res_cnt;
232 __be32 sense_data_len;
233 __be32 resp_data_len;
235 } __attribute__((packed));
237 #endif /* SCSI_SRP_H */