1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * QLogic iSCSI Offload Driver 4 * 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 4096 15 16#define DEF_KA_TIMEOUT 7200000 17#define DEF_KA_INTERVAL 10000 18#define DEF_KA_MAX_PROBE_COUNT 10 19#define DEF_TOS 0 20#define DEF_TTL 0xfe 21#define DEF_SND_SEQ_SCALE 0 22#define DEF_RCV_BUF 0xffff 23#define DEF_SND_BUF 0xffff 24#define DEF_SEED 0 25#define DEF_MAX_RT_TIME 8000 26#define DEF_MAX_DA_COUNT 2 27#define DEF_SWS_TIMER 1000 28#define DEF_MAX_CWND 2 29#define DEF_PATH_MTU 1500 30#define DEF_MSS 1460 31#define DEF_LL2_MTU 1560 32#define JUMBO_MTU 9000 33 34#define MIN_MTU 576 /* rfc 793 */ 35#define IPV4_HDR_LEN 20 36#define IPV6_HDR_LEN 40 37#define TCP_HDR_LEN 20 38#define TCP_OPTION_LEN 12 39#define VLAN_LEN 4 40 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 84 /* Send queue management */ 85 struct iscsi_wqe *sq; 86 dma_addr_t sq_dma; 87 88 u16 sq_prod_idx; 89 u16 fw_sq_prod_idx; 90 u16 sq_con_idx; 91 u32 sq_mem_size; 92 93 void *sq_pbl; 94 dma_addr_t sq_pbl_dma; 95 u32 sq_pbl_size; 96 struct qedi_conn *conn; 97 struct work_struct offload_work; 98}; 99 100#define QEDI_SQ_WQES_MIN 16 101 102struct qedi_io_bdt { 103 struct scsi_sge *sge_tbl; 104 dma_addr_t sge_tbl_dma; 105 u16 sge_valid; 106}; 107 108/** 109 * struct generic_pdu_resc - login pdu resource structure 110 * 111 * @req_buf: driver buffer used to stage payload associated with 112 * the login request 113 * @req_dma_addr: dma address for iscsi login request payload buffer 114 * @req_buf_size: actual login request payload length 115 * @req_wr_ptr: pointer into login request buffer when next data is 116 * to be written 117 * @resp_hdr: iscsi header where iscsi login response header is to 118 * be recreated 119 * @resp_buf: buffer to stage login response payload 120 * @resp_dma_addr: login response payload buffer dma address 121 * @resp_buf_size: login response paylod length 122 * @resp_wr_ptr: pointer into login response buffer when next data is 123 * to be written 124 * @req_bd_tbl: iscsi login request payload BD table 125 * @req_bd_dma: login request BD table dma address 126 * @resp_bd_tbl: iscsi login response payload BD table 127 * @resp_bd_dma: login request BD table dma address 128 * 129 * following structure defines buffer info for generic pdus such as iSCSI Login, 130 * Logout and NOP 131 */ 132struct generic_pdu_resc { 133 char *req_buf; 134 dma_addr_t req_dma_addr; 135 u32 req_buf_size; 136 char *req_wr_ptr; 137 struct iscsi_hdr resp_hdr; 138 char *resp_buf; 139 dma_addr_t resp_dma_addr; 140 u32 resp_buf_size; 141 char *resp_wr_ptr; 142 char *req_bd_tbl; 143 dma_addr_t req_bd_dma; 144 char *resp_bd_tbl; 145 dma_addr_t resp_bd_dma; 146}; 147 148struct qedi_conn { 149 struct iscsi_cls_conn *cls_conn; 150 struct qedi_ctx *qedi; 151 struct qedi_endpoint *ep; 152 struct iscsi_endpoint *iscsi_ep; 153 struct list_head active_cmd_list; 154 spinlock_t list_lock; /* internal conn lock */ 155 u32 active_cmd_count; 156 u32 cmd_cleanup_req; 157 u32 cmd_cleanup_cmpl; 158 159 u32 iscsi_conn_id; 160 int itt; 161 int abrt_conn; 162#define QEDI_CID_RESERVED 0x5AFF 163 u32 fw_cid; 164 /* 165 * Buffer for login negotiation process 166 */ 167 struct generic_pdu_resc gen_pdu; 168 169 struct list_head tmf_work_list; 170 wait_queue_head_t wait_queue; 171 spinlock_t tmf_work_lock; /* tmf work lock */ 172 unsigned long flags; 173#define QEDI_CONN_FW_CLEANUP 1 174}; 175 176struct qedi_cmd { 177 struct list_head io_cmd; 178 bool io_cmd_in_list; 179 struct iscsi_hdr hdr; 180 struct qedi_conn *conn; 181 struct scsi_cmnd *scsi_cmd; 182 struct scatterlist *sg; 183 struct qedi_io_bdt io_tbl; 184 struct e4_iscsi_task_context request; 185 unsigned char *sense_buffer; 186 dma_addr_t sense_buffer_dma; 187 u16 task_id; 188 189 /* field populated for tmf work queue */ 190 struct iscsi_task *task; 191 struct work_struct tmf_work; 192 int state; 193#define CLEANUP_WAIT 1 194#define CLEANUP_RECV 2 195#define CLEANUP_WAIT_FAILED 3 196#define CLEANUP_NOT_REQUIRED 4 197#define LUN_RESET_RESPONSE_RECEIVED 5 198#define RESPONSE_RECEIVED 6 199 200 int type; 201#define TYPEIO 1 202#define TYPERESET 2 203 204 struct qedi_work_map *list_tmf_work; 205 /* slowpath management */ 206 bool use_slowpath; 207 208 struct iscsi_tm_rsp *tmf_resp_buf; 209 struct qedi_work cqe_work; 210}; 211 212struct qedi_work_map { 213 struct list_head list; 214 struct qedi_cmd *qedi_cmd; 215 int rtid; 216 217 int state; 218#define QEDI_WORK_QUEUED 1 219#define QEDI_WORK_SCHEDULED 2 220#define QEDI_WORK_EXIT 3 221 222 struct work_struct *ptr_tmf_work; 223}; 224 225struct qedi_boot_target { 226 char ip_addr[64]; 227 char iscsi_name[255]; 228 u32 ipv6_en; 229}; 230 231#define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16))) 232#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16) 233 234#define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \ 235 (q)->state == EP_STATE_OFLDCONN_COMPL) 236 237#endif /* _QEDI_ISCSI_H_ */ 238