240 строки
5.9 KiB
C
240 строки
5.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* QLogic iSCSI Offload Driver
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* Copyright (c) 2016 Cavium Inc.
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*/
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#ifndef _QEDI_ISCSI_H_
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#define _QEDI_ISCSI_H_
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#include <linux/socket.h>
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#include <linux/completion.h>
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#include "qedi.h"
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#define ISCSI_MAX_SESS_PER_HBA 4096
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#define DEF_KA_TIMEOUT 7200000
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#define DEF_KA_INTERVAL 10000
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#define DEF_KA_MAX_PROBE_COUNT 10
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#define DEF_TOS 0
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#define DEF_TTL 0xfe
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#define DEF_SND_SEQ_SCALE 0
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#define DEF_RCV_BUF 0xffff
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#define DEF_SND_BUF 0xffff
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#define DEF_SEED 0
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#define DEF_MAX_RT_TIME 8000
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#define DEF_MAX_DA_COUNT 2
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#define DEF_SWS_TIMER 1000
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#define DEF_MAX_CWND 2
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#define DEF_PATH_MTU 1500
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#define DEF_MSS 1460
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#define DEF_LL2_MTU 1560
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#define JUMBO_MTU 9000
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#define MIN_MTU 576 /* rfc 793 */
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#define IPV4_HDR_LEN 20
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#define IPV6_HDR_LEN 40
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#define TCP_HDR_LEN 20
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#define TCP_OPTION_LEN 12
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#define VLAN_LEN 4
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enum {
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EP_STATE_IDLE = 0x0,
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EP_STATE_ACQRCONN_START = 0x1,
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EP_STATE_ACQRCONN_COMPL = 0x2,
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EP_STATE_OFLDCONN_START = 0x4,
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EP_STATE_OFLDCONN_COMPL = 0x8,
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EP_STATE_DISCONN_START = 0x10,
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EP_STATE_DISCONN_COMPL = 0x20,
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EP_STATE_CLEANUP_START = 0x40,
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EP_STATE_CLEANUP_CMPL = 0x80,
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EP_STATE_TCP_FIN_RCVD = 0x100,
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EP_STATE_TCP_RST_RCVD = 0x200,
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EP_STATE_LOGOUT_SENT = 0x400,
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EP_STATE_LOGOUT_RESP_RCVD = 0x800,
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EP_STATE_CLEANUP_FAILED = 0x1000,
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EP_STATE_OFLDCONN_FAILED = 0x2000,
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EP_STATE_CONNECT_FAILED = 0x4000,
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EP_STATE_DISCONN_TIMEDOUT = 0x8000,
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EP_STATE_OFLDCONN_NONE = 0x10000,
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};
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struct qedi_conn;
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struct qedi_endpoint {
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struct qedi_ctx *qedi;
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u32 dst_addr[4];
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u32 src_addr[4];
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u16 src_port;
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u16 dst_port;
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u16 vlan_id;
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u16 pmtu;
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u8 src_mac[ETH_ALEN];
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u8 dst_mac[ETH_ALEN];
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u8 ip_type;
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int state;
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wait_queue_head_t ofld_wait;
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wait_queue_head_t tcp_ofld_wait;
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u32 iscsi_cid;
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/* identifier of the connection from qed */
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u32 handle;
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u32 fw_cid;
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void __iomem *p_doorbell;
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struct iscsi_db_data db_data;
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/* Send queue management */
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struct iscsi_wqe *sq;
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dma_addr_t sq_dma;
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u16 sq_prod_idx;
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u16 fw_sq_prod_idx;
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u16 sq_con_idx;
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u32 sq_mem_size;
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void *sq_pbl;
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dma_addr_t sq_pbl_dma;
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u32 sq_pbl_size;
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struct qedi_conn *conn;
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struct work_struct offload_work;
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};
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#define QEDI_SQ_WQES_MIN 16
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struct qedi_io_bdt {
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struct scsi_sge *sge_tbl;
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dma_addr_t sge_tbl_dma;
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u16 sge_valid;
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};
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/**
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* struct generic_pdu_resc - login pdu resource structure
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*
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* @req_buf: driver buffer used to stage payload associated with
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* the login request
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* @req_dma_addr: dma address for iscsi login request payload buffer
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* @req_buf_size: actual login request payload length
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* @req_wr_ptr: pointer into login request buffer when next data is
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* to be written
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* @resp_hdr: iscsi header where iscsi login response header is to
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* be recreated
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* @resp_buf: buffer to stage login response payload
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* @resp_dma_addr: login response payload buffer dma address
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* @resp_buf_size: login response paylod length
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* @resp_wr_ptr: pointer into login response buffer when next data is
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* to be written
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* @req_bd_tbl: iscsi login request payload BD table
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* @req_bd_dma: login request BD table dma address
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* @resp_bd_tbl: iscsi login response payload BD table
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* @resp_bd_dma: login request BD table dma address
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*
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* following structure defines buffer info for generic pdus such as iSCSI Login,
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* Logout and NOP
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*/
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struct generic_pdu_resc {
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char *req_buf;
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dma_addr_t req_dma_addr;
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u32 req_buf_size;
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char *req_wr_ptr;
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struct iscsi_hdr resp_hdr;
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char *resp_buf;
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dma_addr_t resp_dma_addr;
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u32 resp_buf_size;
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char *resp_wr_ptr;
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char *req_bd_tbl;
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dma_addr_t req_bd_dma;
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char *resp_bd_tbl;
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dma_addr_t resp_bd_dma;
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};
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struct qedi_conn {
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struct iscsi_cls_conn *cls_conn;
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struct qedi_ctx *qedi;
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struct qedi_endpoint *ep;
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struct iscsi_endpoint *iscsi_ep;
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struct list_head active_cmd_list;
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spinlock_t list_lock; /* internal conn lock */
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u32 active_cmd_count;
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u32 cmd_cleanup_req;
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u32 cmd_cleanup_cmpl;
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u32 iscsi_conn_id;
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int itt;
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int abrt_conn;
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#define QEDI_CID_RESERVED 0x5AFF
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u32 fw_cid;
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/*
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* Buffer for login negotiation process
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*/
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struct generic_pdu_resc gen_pdu;
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struct list_head tmf_work_list;
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wait_queue_head_t wait_queue;
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spinlock_t tmf_work_lock; /* tmf work lock */
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bool ep_disconnect_starting;
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int fw_cleanup_works;
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};
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struct qedi_cmd {
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struct list_head io_cmd;
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bool io_cmd_in_list;
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struct iscsi_hdr hdr;
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struct qedi_conn *conn;
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struct scsi_cmnd *scsi_cmd;
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struct scatterlist *sg;
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struct qedi_io_bdt io_tbl;
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struct e4_iscsi_task_context request;
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unsigned char *sense_buffer;
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dma_addr_t sense_buffer_dma;
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u16 task_id;
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/* field populated for tmf work queue */
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struct iscsi_task *task;
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struct work_struct tmf_work;
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int state;
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#define CLEANUP_WAIT 1
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#define CLEANUP_RECV 2
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#define CLEANUP_WAIT_FAILED 3
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#define CLEANUP_NOT_REQUIRED 4
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#define LUN_RESET_RESPONSE_RECEIVED 5
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#define RESPONSE_RECEIVED 6
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int type;
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#define TYPEIO 1
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#define TYPERESET 2
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struct qedi_work_map *list_tmf_work;
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/* slowpath management */
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bool use_slowpath;
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struct iscsi_tm_rsp *tmf_resp_buf;
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struct qedi_work cqe_work;
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};
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struct qedi_work_map {
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struct list_head list;
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struct qedi_cmd *qedi_cmd;
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struct iscsi_task *ctask;
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int rtid;
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int state;
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#define QEDI_WORK_QUEUED 1
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#define QEDI_WORK_SCHEDULED 2
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#define QEDI_WORK_EXIT 3
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struct work_struct *ptr_tmf_work;
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};
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struct qedi_boot_target {
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char ip_addr[64];
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char iscsi_name[255];
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u32 ipv6_en;
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};
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#define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16)))
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#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)
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#define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \
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(q)->state == EP_STATE_OFLDCONN_COMPL)
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#endif /* _QEDI_ISCSI_H_ */
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