drivers/target/iscsi/iscsi_target_seq_pdu_list.h

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