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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * QLogic iSCSI Offload Driver4 * Copyright (c) 2016 Cavium Inc.5 */6 7#ifndef _QEDI_ISCSI_H_8#define _QEDI_ISCSI_H_9 10#include <linux/socket.h>11#include <linux/completion.h>12#include "qedi.h"13 14#define ISCSI_MAX_SESS_PER_HBA 409615 16#define DEF_KA_TIMEOUT 720000017#define DEF_KA_INTERVAL 1000018#define DEF_KA_MAX_PROBE_COUNT 1019#define DEF_TOS 020#define DEF_TTL 0xfe21#define DEF_SND_SEQ_SCALE 022#define DEF_RCV_BUF 0xffff23#define DEF_SND_BUF 0xffff24#define DEF_SEED 025#define DEF_MAX_RT_TIME 800026#define DEF_MAX_DA_COUNT 227#define DEF_SWS_TIMER 100028#define DEF_MAX_CWND 229#define DEF_PATH_MTU 150030#define DEF_MSS 146031#define DEF_LL2_MTU 156032#define JUMBO_MTU 900033 34#define MIN_MTU 576 /* rfc 793 */35#define IPV4_HDR_LEN 2036#define IPV6_HDR_LEN 4037#define TCP_HDR_LEN 2038#define TCP_OPTION_LEN 1239#define VLAN_LEN 440 41enum {42 EP_STATE_IDLE = 0x0,43 EP_STATE_ACQRCONN_START = 0x1,44 EP_STATE_ACQRCONN_COMPL = 0x2,45 EP_STATE_OFLDCONN_START = 0x4,46 EP_STATE_OFLDCONN_COMPL = 0x8,47 EP_STATE_DISCONN_START = 0x10,48 EP_STATE_DISCONN_COMPL = 0x20,49 EP_STATE_CLEANUP_START = 0x40,50 EP_STATE_CLEANUP_CMPL = 0x80,51 EP_STATE_TCP_FIN_RCVD = 0x100,52 EP_STATE_TCP_RST_RCVD = 0x200,53 EP_STATE_LOGOUT_SENT = 0x400,54 EP_STATE_LOGOUT_RESP_RCVD = 0x800,55 EP_STATE_CLEANUP_FAILED = 0x1000,56 EP_STATE_OFLDCONN_FAILED = 0x2000,57 EP_STATE_CONNECT_FAILED = 0x4000,58 EP_STATE_DISCONN_TIMEDOUT = 0x8000,59 EP_STATE_OFLDCONN_NONE = 0x10000,60};61 62struct qedi_conn;63 64struct qedi_endpoint {65 struct qedi_ctx *qedi;66 u32 dst_addr[4];67 u32 src_addr[4];68 u16 src_port;69 u16 dst_port;70 u16 vlan_id;71 u16 pmtu;72 u8 src_mac[ETH_ALEN];73 u8 dst_mac[ETH_ALEN];74 u8 ip_type;75 int state;76 wait_queue_head_t ofld_wait;77 wait_queue_head_t tcp_ofld_wait;78 u32 iscsi_cid;79 /* identifier of the connection from qed */80 u32 handle;81 u32 fw_cid;82 void __iomem *p_doorbell;83 struct iscsi_db_data db_data;84 85 /* Send queue management */86 struct iscsi_wqe *sq;87 dma_addr_t sq_dma;88 89 u16 sq_prod_idx;90 u16 fw_sq_prod_idx;91 u16 sq_con_idx;92 u32 sq_mem_size;93 94 void *sq_pbl;95 dma_addr_t sq_pbl_dma;96 u32 sq_pbl_size;97 struct qedi_conn *conn;98 struct work_struct offload_work;99};100 101#define QEDI_SQ_WQES_MIN 16102 103struct qedi_io_bdt {104 struct scsi_sge *sge_tbl;105 dma_addr_t sge_tbl_dma;106 u16 sge_valid;107};108 109/**110 * struct generic_pdu_resc - login pdu resource structure111 *112 * @req_buf: driver buffer used to stage payload associated with113 * the login request114 * @req_dma_addr: dma address for iscsi login request payload buffer115 * @req_buf_size: actual login request payload length116 * @req_wr_ptr: pointer into login request buffer when next data is117 * to be written118 * @resp_hdr: iscsi header where iscsi login response header is to119 * be recreated120 * @resp_buf: buffer to stage login response payload121 * @resp_dma_addr: login response payload buffer dma address122 * @resp_buf_size: login response paylod length123 * @resp_wr_ptr: pointer into login response buffer when next data is124 * to be written125 * @req_bd_tbl: iscsi login request payload BD table126 * @req_bd_dma: login request BD table dma address127 * @resp_bd_tbl: iscsi login response payload BD table128 * @resp_bd_dma: login request BD table dma address129 *130 * following structure defines buffer info for generic pdus such as iSCSI Login,131 * Logout and NOP132 */133struct generic_pdu_resc {134 char *req_buf;135 dma_addr_t req_dma_addr;136 u32 req_buf_size;137 char *req_wr_ptr;138 struct iscsi_hdr resp_hdr;139 char *resp_buf;140 dma_addr_t resp_dma_addr;141 u32 resp_buf_size;142 char *resp_wr_ptr;143 char *req_bd_tbl;144 dma_addr_t req_bd_dma;145 char *resp_bd_tbl;146 dma_addr_t resp_bd_dma;147};148 149struct qedi_conn {150 struct iscsi_cls_conn *cls_conn;151 struct qedi_ctx *qedi;152 struct qedi_endpoint *ep;153 struct iscsi_endpoint *iscsi_ep;154 struct list_head active_cmd_list;155 spinlock_t list_lock; /* internal conn lock */156 u32 active_cmd_count;157 u32 cmd_cleanup_req;158 atomic_t cmd_cleanup_cmpl;159 160 u32 iscsi_conn_id;161 int itt;162 int abrt_conn;163#define QEDI_CID_RESERVED 0x5AFF164 u32 fw_cid;165 /*166 * Buffer for login negotiation process167 */168 struct generic_pdu_resc gen_pdu;169 170 struct list_head tmf_work_list;171 wait_queue_head_t wait_queue;172 spinlock_t tmf_work_lock; /* tmf work lock */173 bool ep_disconnect_starting;174 int fw_cleanup_works;175};176 177struct qedi_cmd {178 struct list_head io_cmd;179 bool io_cmd_in_list;180 struct iscsi_hdr hdr;181 struct qedi_conn *conn;182 struct scsi_cmnd *scsi_cmd;183 struct scatterlist *sg;184 struct qedi_io_bdt io_tbl;185 struct iscsi_task_context request;186 unsigned char *sense_buffer;187 dma_addr_t sense_buffer_dma;188 u16 task_id;189 190 /* field populated for tmf work queue */191 struct iscsi_task *task;192 struct work_struct tmf_work;193 int state;194#define CLEANUP_WAIT 1195#define CLEANUP_RECV 2196#define CLEANUP_WAIT_FAILED 3197#define CLEANUP_NOT_REQUIRED 4198#define LUN_RESET_RESPONSE_RECEIVED 5199#define RESPONSE_RECEIVED 6200 201 int type;202#define TYPEIO 1203#define TYPERESET 2204 205 struct qedi_work_map *list_tmf_work;206 /* slowpath management */207 bool use_slowpath;208 209 struct iscsi_tm_rsp *tmf_resp_buf;210 struct qedi_work cqe_work;211};212 213struct qedi_work_map {214 struct list_head list;215 struct qedi_cmd *qedi_cmd;216 struct iscsi_task *ctask;217 int rtid;218 219 int state;220#define QEDI_WORK_QUEUED 1221#define QEDI_WORK_SCHEDULED 2222#define QEDI_WORK_EXIT 3223 224 struct work_struct *ptr_tmf_work;225};226 227struct qedi_boot_target {228 char ip_addr[64];229 char iscsi_name[255];230 u32 ipv6_en;231};232 233#define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16)))234#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)235 236#define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \237 (q)->state == EP_STATE_OFLDCONN_COMPL)238 239#endif /* _QEDI_ISCSI_H_ */240