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