LXR linux/drivers/target/iscsi/iscsi_target_seq_pdu

   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
  48struct iscsi_build_list {
  49        int             data_direction;
  50        int             randomize;
  51        int             type;
  52        int             immediate_data_length;
  53};
  54
  55struct 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
  66struct 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
  85struct iscsi_cmd;
  86
  87extern int iscsit_build_pdu_and_seq_lists(struct iscsi_cmd *, u32);
  88extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsi_cmd *, u32, u32);
  89extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsi_cmd *, struct iscsi_seq *);
  90extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsi_cmd *, u32, u32);
  91
  92#endif /* ISCSI_SEQ_AND_PDU_LIST_H */
  93