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 41 enum { 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 62 struct qedi_conn; 63 64 struct 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 16 101 102 struct 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 */ 132 struct 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 }; 147 148 struct qedi_conn { 149 struct iscsi_cls_conn *cls_conn; 150 struct qedi_ctx *qedi; 151 struct qedi_endpoint *ep; 152 struct list_head active_cmd_list; 153 spinlock_t list_lock; /* internal conn lock */ 154 u32 active_cmd_count; 155 u32 cmd_cleanup_req; 156 u32 cmd_cleanup_cmpl; 157 158 u32 iscsi_conn_id; 159 int itt; 160 int abrt_conn; 161 #define QEDI_CID_RESERVED 0x5AFF 162 u32 fw_cid; 163 /* 164 * Buffer for login negotiation process 165 */ 166 struct generic_pdu_resc gen_pdu; 167 168 struct list_head tmf_work_list; 169 wait_queue_head_t wait_queue; 170 spinlock_t tmf_work_lock; /* tmf work lock */ 171 unsigned long flags; 172 #define QEDI_CONN_FW_CLEANUP 1 173 }; 174 175 struct qedi_cmd { 176 struct list_head io_cmd; 177 bool io_cmd_in_list; 178 struct iscsi_hdr hdr; 179 struct qedi_conn *conn; 180 struct scsi_cmnd *scsi_cmd; 181 struct scatterlist *sg; 182 struct qedi_io_bdt io_tbl; 183 struct e4_iscsi_task_context request; 184 unsigned char *sense_buffer; 185 dma_addr_t sense_buffer_dma; 186 u16 task_id; 187 188 /* field populated for tmf work queue */ 189 struct iscsi_task *task; 190 struct work_struct tmf_work; 191 int state; 192 #define CLEANUP_WAIT 1 193 #define CLEANUP_RECV 2 194 #define CLEANUP_WAIT_FAILED 3 195 #define CLEANUP_NOT_REQUIRED 4 196 #define LUN_RESET_RESPONSE_RECEIVED 5 197 #define RESPONSE_RECEIVED 6 198 199 int type; 200 #define TYPEIO 1 201 #define TYPERESET 2 202 203 struct qedi_work_map *list_tmf_work; 204 /* slowpath management */ 205 bool use_slowpath; 206 207 struct iscsi_tm_rsp *tmf_resp_buf; 208 struct qedi_work cqe_work; 209 }; 210 211 struct qedi_work_map { 212 struct list_head list; 213 struct qedi_cmd *qedi_cmd; 214 int rtid; 215 216 int state; 217 #define QEDI_WORK_QUEUED 1 218 #define QEDI_WORK_SCHEDULED 2 219 #define QEDI_WORK_EXIT 3 220 221 struct work_struct *ptr_tmf_work; 222 }; 223 224 struct qedi_boot_target { 225 char ip_addr[64]; 226 char iscsi_name[255]; 227 u32 ipv6_en; 228 }; 229 230 #define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16))) 231 #define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16) 232 233 #define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \ 234 (q)->state == EP_STATE_OFLDCONN_COMPL) 235 236 #endif /* _QEDI_ISCSI_H_ */ 237