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