Linux 4.16.11
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_iscsi.h
blobea13151899222f62e28dc8b37ad17795948d70e8
1 /*
2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
8 */
10 #ifndef _QEDI_ISCSI_H_
11 #define _QEDI_ISCSI_H_
13 #include <linux/socket.h>
14 #include <linux/completion.h>
15 #include "qedi.h"
17 #define ISCSI_MAX_SESS_PER_HBA 4096
19 #define DEF_KA_TIMEOUT 7200000
20 #define DEF_KA_INTERVAL 10000
21 #define DEF_KA_MAX_PROBE_COUNT 10
22 #define DEF_TOS 0
23 #define DEF_TTL 0xfe
24 #define DEF_SND_SEQ_SCALE 0
25 #define DEF_RCV_BUF 0xffff
26 #define DEF_SND_BUF 0xffff
27 #define DEF_SEED 0
28 #define DEF_MAX_RT_TIME 8000
29 #define DEF_MAX_DA_COUNT 2
30 #define DEF_SWS_TIMER 1000
31 #define DEF_MAX_CWND 2
32 #define DEF_PATH_MTU 1500
33 #define DEF_MSS 1460
34 #define DEF_LL2_MTU 1560
35 #define JUMBO_MTU 9000
37 #define MIN_MTU 576 /* rfc 793 */
38 #define IPV4_HDR_LEN 20
39 #define IPV6_HDR_LEN 40
40 #define TCP_HDR_LEN 20
41 #define TCP_OPTION_LEN 12
42 #define VLAN_LEN 4
44 enum {
45 EP_STATE_IDLE = 0x0,
46 EP_STATE_ACQRCONN_START = 0x1,
47 EP_STATE_ACQRCONN_COMPL = 0x2,
48 EP_STATE_OFLDCONN_START = 0x4,
49 EP_STATE_OFLDCONN_COMPL = 0x8,
50 EP_STATE_DISCONN_START = 0x10,
51 EP_STATE_DISCONN_COMPL = 0x20,
52 EP_STATE_CLEANUP_START = 0x40,
53 EP_STATE_CLEANUP_CMPL = 0x80,
54 EP_STATE_TCP_FIN_RCVD = 0x100,
55 EP_STATE_TCP_RST_RCVD = 0x200,
56 EP_STATE_LOGOUT_SENT = 0x400,
57 EP_STATE_LOGOUT_RESP_RCVD = 0x800,
58 EP_STATE_CLEANUP_FAILED = 0x1000,
59 EP_STATE_OFLDCONN_FAILED = 0x2000,
60 EP_STATE_CONNECT_FAILED = 0x4000,
61 EP_STATE_DISCONN_TIMEDOUT = 0x8000,
64 struct qedi_conn;
66 struct qedi_endpoint {
67 struct qedi_ctx *qedi;
68 u32 dst_addr[4];
69 u32 src_addr[4];
70 u16 src_port;
71 u16 dst_port;
72 u16 vlan_id;
73 u16 pmtu;
74 u8 src_mac[ETH_ALEN];
75 u8 dst_mac[ETH_ALEN];
76 u8 ip_type;
77 int state;
78 wait_queue_head_t ofld_wait;
79 wait_queue_head_t tcp_ofld_wait;
80 u32 iscsi_cid;
81 /* identifier of the connection from qed */
82 u32 handle;
83 u32 fw_cid;
84 void __iomem *p_doorbell;
86 /* Send queue management */
87 struct iscsi_wqe *sq;
88 dma_addr_t sq_dma;
90 u16 sq_prod_idx;
91 u16 fw_sq_prod_idx;
92 u16 sq_con_idx;
93 u32 sq_mem_size;
95 void *sq_pbl;
96 dma_addr_t sq_pbl_dma;
97 u32 sq_pbl_size;
98 struct qedi_conn *conn;
99 struct work_struct offload_work;
102 #define QEDI_SQ_WQES_MIN 16
104 struct qedi_io_bdt {
105 struct scsi_sge *sge_tbl;
106 dma_addr_t sge_tbl_dma;
107 u16 sge_valid;
111 * struct generic_pdu_resc - login pdu resource structure
113 * @req_buf: driver buffer used to stage payload associated with
114 * the login request
115 * @req_dma_addr: dma address for iscsi login request payload buffer
116 * @req_buf_size: actual login request payload length
117 * @req_wr_ptr: pointer into login request buffer when next data is
118 * to be written
119 * @resp_hdr: iscsi header where iscsi login response header is to
120 * be recreated
121 * @resp_buf: buffer to stage login response payload
122 * @resp_dma_addr: login response payload buffer dma address
123 * @resp_buf_size: login response paylod length
124 * @resp_wr_ptr: pointer into login response buffer when next data is
125 * to be written
126 * @req_bd_tbl: iscsi login request payload BD table
127 * @req_bd_dma: login request BD table dma address
128 * @resp_bd_tbl: iscsi login response payload BD table
129 * @resp_bd_dma: login request BD table dma address
131 * following structure defines buffer info for generic pdus such as iSCSI Login,
132 * Logout and NOP
134 struct generic_pdu_resc {
135 char *req_buf;
136 dma_addr_t req_dma_addr;
137 u32 req_buf_size;
138 char *req_wr_ptr;
139 struct iscsi_hdr resp_hdr;
140 char *resp_buf;
141 dma_addr_t resp_dma_addr;
142 u32 resp_buf_size;
143 char *resp_wr_ptr;
144 char *req_bd_tbl;
145 dma_addr_t req_bd_dma;
146 char *resp_bd_tbl;
147 dma_addr_t resp_bd_dma;
150 struct qedi_conn {
151 struct iscsi_cls_conn *cls_conn;
152 struct qedi_ctx *qedi;
153 struct qedi_endpoint *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 u32 cmd_cleanup_cmpl;
160 u32 iscsi_conn_id;
161 int itt;
162 int abrt_conn;
163 #define QEDI_CID_RESERVED 0x5AFF
164 u32 fw_cid;
166 * Buffer for login negotiation process
168 struct generic_pdu_resc gen_pdu;
170 struct list_head tmf_work_list;
171 wait_queue_head_t wait_queue;
172 spinlock_t tmf_work_lock; /* tmf work lock */
173 unsigned long flags;
174 #define QEDI_CONN_FW_CLEANUP 1
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 e4_iscsi_task_context request;
186 unsigned char *sense_buffer;
187 dma_addr_t sense_buffer_dma;
188 u16 task_id;
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
201 int type;
202 #define TYPEIO 1
203 #define TYPERESET 2
205 struct qedi_work_map *list_tmf_work;
206 /* slowpath management */
207 bool use_slowpath;
209 struct iscsi_tm_rsp *tmf_resp_buf;
210 struct qedi_work cqe_work;
213 struct qedi_work_map {
214 struct list_head list;
215 struct qedi_cmd *qedi_cmd;
216 int rtid;
218 int state;
219 #define QEDI_WORK_QUEUED 1
220 #define QEDI_WORK_SCHEDULED 2
221 #define QEDI_WORK_EXIT 3
223 struct work_struct *ptr_tmf_work;
226 #define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16)))
227 #define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)
229 #define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \
230 (q)->state == EP_STATE_OFLDCONN_COMPL)
232 #endif /* _QEDI_ISCSI_H_ */