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
10 #ifndef _QEDI_ISCSI_H_
11 #define _QEDI_ISCSI_H_
13 #include <linux/socket.h>
14 #include <linux/completion.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
24 #define DEF_SND_SEQ_SCALE 0
25 #define DEF_RCV_BUF 0xffff
26 #define DEF_SND_BUF 0xffff
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
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
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,
62 EP_STATE_OFLDCONN_NONE = 0x10000,
67 struct qedi_endpoint {
68 struct qedi_ctx *qedi;
79 wait_queue_head_t ofld_wait;
80 wait_queue_head_t tcp_ofld_wait;
82 /* identifier of the connection from qed */
85 void __iomem *p_doorbell;
87 /* Send queue management */
97 dma_addr_t sq_pbl_dma;
99 struct qedi_conn *conn;
100 struct work_struct offload_work;
103 #define QEDI_SQ_WQES_MIN 16
106 struct scsi_sge *sge_tbl;
107 dma_addr_t sge_tbl_dma;
112 * struct generic_pdu_resc - login pdu resource structure
114 * @req_buf: driver buffer used to stage payload associated with
116 * @req_dma_addr: dma address for iscsi login request payload buffer
117 * @req_buf_size: actual login request payload length
118 * @req_wr_ptr: pointer into login request buffer when next data is
120 * @resp_hdr: iscsi header where iscsi login response header is to
122 * @resp_buf: buffer to stage login response payload
123 * @resp_dma_addr: login response payload buffer dma address
124 * @resp_buf_size: login response paylod length
125 * @resp_wr_ptr: pointer into login response buffer when next data is
127 * @req_bd_tbl: iscsi login request payload BD table
128 * @req_bd_dma: login request BD table dma address
129 * @resp_bd_tbl: iscsi login response payload BD table
130 * @resp_bd_dma: login request BD table dma address
132 * following structure defines buffer info for generic pdus such as iSCSI Login,
135 struct generic_pdu_resc {
137 dma_addr_t req_dma_addr;
140 struct iscsi_hdr resp_hdr;
142 dma_addr_t resp_dma_addr;
146 dma_addr_t req_bd_dma;
148 dma_addr_t resp_bd_dma;
152 struct iscsi_cls_conn *cls_conn;
153 struct qedi_ctx *qedi;
154 struct qedi_endpoint *ep;
155 struct list_head active_cmd_list;
156 spinlock_t list_lock; /* internal conn lock */
157 u32 active_cmd_count;
159 u32 cmd_cleanup_cmpl;
164 #define QEDI_CID_RESERVED 0x5AFF
167 * Buffer for login negotiation process
169 struct generic_pdu_resc gen_pdu;
171 struct list_head tmf_work_list;
172 wait_queue_head_t wait_queue;
173 spinlock_t tmf_work_lock; /* tmf work lock */
175 #define QEDI_CONN_FW_CLEANUP 1
179 struct list_head io_cmd;
181 struct iscsi_hdr hdr;
182 struct qedi_conn *conn;
183 struct scsi_cmnd *scsi_cmd;
184 struct scatterlist *sg;
185 struct qedi_io_bdt io_tbl;
186 struct iscsi_task_context request;
187 unsigned char *sense_buffer;
188 dma_addr_t sense_buffer_dma;
191 /* field populated for tmf work queue */
192 struct iscsi_task *task;
193 struct work_struct tmf_work;
195 #define CLEANUP_WAIT 1
196 #define CLEANUP_RECV 2
197 #define CLEANUP_WAIT_FAILED 3
198 #define CLEANUP_NOT_REQUIRED 4
199 #define LUN_RESET_RESPONSE_RECEIVED 5
200 #define RESPONSE_RECEIVED 6
206 struct qedi_work_map *list_tmf_work;
207 /* slowpath management */
210 struct iscsi_tm_rsp *tmf_resp_buf;
211 struct qedi_work cqe_work;
214 struct qedi_work_map {
215 struct list_head list;
216 struct qedi_cmd *qedi_cmd;
220 #define QEDI_WORK_QUEUED 1
221 #define QEDI_WORK_SCHEDULED 2
222 #define QEDI_WORK_EXIT 3
224 struct work_struct *ptr_tmf_work;
227 #define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16)))
228 #define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)
230 #define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \
231 (q)->state == EP_STATE_OFLDCONN_COMPL)
233 #endif /* _QEDI_ISCSI_H_ */