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 | 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 16 |
102 | |
103 | struct 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 structure |
111 | * |
112 | * @req_buf: driver buffer used to stage payload associated with |
113 | * the login request |
114 | * @req_dma_addr: dma address for iscsi login request payload buffer |
115 | * @req_buf_size: actual login request payload length |
116 | * @req_wr_ptr: pointer into login request buffer when next data is |
117 | * to be written |
118 | * @resp_hdr: iscsi header where iscsi login response header is to |
119 | * be recreated |
120 | * @resp_buf: buffer to stage login response payload |
121 | * @resp_dma_addr: login response payload buffer dma address |
122 | * @resp_buf_size: login response paylod length |
123 | * @resp_wr_ptr: pointer into login response buffer when next data is |
124 | * to be written |
125 | * @req_bd_tbl: iscsi login request payload BD table |
126 | * @req_bd_dma: login request BD table dma address |
127 | * @resp_bd_tbl: iscsi login response payload BD table |
128 | * @resp_bd_dma: login request BD table dma address |
129 | * |
130 | * following structure defines buffer info for generic pdus such as iSCSI Login, |
131 | * Logout and NOP |
132 | */ |
133 | struct 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 | |
149 | struct 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 0x5AFF |
164 | u32 fw_cid; |
165 | /* |
166 | * Buffer for login negotiation process |
167 | */ |
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 | |
177 | struct 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 1 |
195 | #define CLEANUP_RECV 2 |
196 | #define CLEANUP_WAIT_FAILED 3 |
197 | #define CLEANUP_NOT_REQUIRED 4 |
198 | #define LUN_RESET_RESPONSE_RECEIVED 5 |
199 | #define RESPONSE_RECEIVED 6 |
200 | |
201 | int type; |
202 | #define TYPEIO 1 |
203 | #define TYPERESET 2 |
204 | |
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 | |
213 | struct 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 1 |
221 | #define QEDI_WORK_SCHEDULED 2 |
222 | #define QEDI_WORK_EXIT 3 |
223 | |
224 | struct work_struct *ptr_tmf_work; |
225 | }; |
226 | |
227 | struct 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 | |