1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef ISCSI_SEQ_AND_PDU_LIST_H |
3 | #define ISCSI_SEQ_AND_PDU_LIST_H |
4 | |
5 | #include <linux/types.h> |
6 | #include <linux/cache.h> |
7 | |
8 | /* struct iscsi_pdu->status */ |
9 | #define DATAOUT_PDU_SENT 1 |
10 | |
11 | /* struct iscsi_seq->type */ |
12 | #define SEQTYPE_IMMEDIATE 1 |
13 | #define SEQTYPE_UNSOLICITED 2 |
14 | #define SEQTYPE_NORMAL 3 |
15 | |
16 | /* struct iscsi_seq->status */ |
17 | #define DATAOUT_SEQUENCE_GOT_R2T 1 |
18 | #define DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY 2 |
19 | #define DATAOUT_SEQUENCE_COMPLETE 3 |
20 | |
21 | /* iscsi_determine_counts_for_list() type */ |
22 | #define PDULIST_NORMAL 1 |
23 | #define PDULIST_IMMEDIATE 2 |
24 | #define PDULIST_UNSOLICITED 3 |
25 | #define PDULIST_IMMEDIATE_AND_UNSOLICITED 4 |
26 | |
27 | /* struct iscsi_pdu->type */ |
28 | #define PDUTYPE_IMMEDIATE 1 |
29 | #define PDUTYPE_UNSOLICITED 2 |
30 | #define PDUTYPE_NORMAL 3 |
31 | |
32 | /* struct iscsi_pdu->status */ |
33 | #define ISCSI_PDU_NOT_RECEIVED 0 |
34 | #define ISCSI_PDU_RECEIVED_OK 1 |
35 | #define ISCSI_PDU_CRC_FAILED 2 |
36 | #define ISCSI_PDU_TIMED_OUT 3 |
37 | |
38 | /* struct iscsi_build_list->randomize */ |
39 | #define RANDOM_DATAIN_PDU_OFFSETS 0x01 |
40 | #define RANDOM_DATAIN_SEQ_OFFSETS 0x02 |
41 | #define RANDOM_DATAOUT_PDU_OFFSETS 0x04 |
42 | #define RANDOM_R2T_OFFSETS 0x08 |
43 | |
44 | /* struct iscsi_build_list->data_direction */ |
45 | #define ISCSI_PDU_READ 0x01 |
46 | #define ISCSI_PDU_WRITE 0x02 |
47 | |
48 | struct iscsi_build_list { |
49 | int data_direction; |
50 | int randomize; |
51 | int type; |
52 | int immediate_data_length; |
53 | }; |
54 | |
55 | struct iscsi_pdu { |
56 | int status; |
57 | int type; |
58 | u8 flags; |
59 | u32 data_sn; |
60 | u32 length; |
61 | u32 offset; |
62 | u32 pdu_send_order; |
63 | u32 seq_no; |
64 | } ____cacheline_aligned; |
65 | |
66 | struct iscsi_seq { |
67 | int sent; |
68 | int status; |
69 | int type; |
70 | u32 data_sn; |
71 | u32 first_datasn; |
72 | u32 last_datasn; |
73 | u32 next_burst_len; |
74 | u32 pdu_start; |
75 | u32 pdu_count; |
76 | u32 offset; |
77 | u32 orig_offset; |
78 | u32 pdu_send_order; |
79 | u32 r2t_sn; |
80 | u32 seq_send_order; |
81 | u32 seq_no; |
82 | u32 xfer_len; |
83 | } ____cacheline_aligned; |
84 | |
85 | struct iscsit_cmd; |
86 | |
87 | extern int iscsit_build_pdu_and_seq_lists(struct iscsit_cmd *, u32); |
88 | extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsit_cmd *, u32, u32); |
89 | extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsit_cmd *, struct iscsi_seq *); |
90 | extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsit_cmd *, u32, u32); |
91 | |
92 | #endif /* ISCSI_SEQ_AND_PDU_LIST_H */ |
93 | |