1 /*-
2 * Copyright (c) 2012, 2015 Chelsio Communications, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #ifndef __CXGBEI_OFLD_H__
29 #define __CXGBEI_OFLD_H__
30
31 #include <dev/iscsi/icl.h>
32
33 #define CXGBEI_CONN_SIGNATURE 0x56788765
34
35 struct cxgbei_cmp {
36 LIST_ENTRY(cxgbei_cmp) link;
37
38 uint32_t tt; /* Transfer tag. */
39
40 uint32_t next_buffer_offset;
41 uint32_t last_datasn;
42 };
43 LIST_HEAD(cxgbei_cmp_head, cxgbei_cmp);
44
45 struct icl_cxgbei_conn {
46 struct icl_conn ic;
47
48 /* cxgbei specific stuff goes here. */
49 uint32_t icc_signature;
50 int ulp_submode;
51 struct adapter *sc;
52 struct toepcb *toep;
53
54 /* Receive related. */
55 bool rx_active; /* protected by so_rcv lock */
56 bool rx_exiting; /* protected by so_rcv lock */
57 STAILQ_HEAD(, icl_pdu) rcvd_pdus; /* protected by so_rcv lock */
58 struct thread *rx_thread;
59
60 struct cxgbei_cmp_head *cmp_table; /* protected by cmp_lock */
61 struct mtx cmp_lock;
62 unsigned long cmp_hash_mask;
63
64 /* Transmit related. */
65 bool tx_active; /* protected by ic lock */
66 STAILQ_HEAD(, icl_pdu) sent_pdus; /* protected by ic lock */
67 struct thread *tx_thread;
68 };
69
70 static inline struct icl_cxgbei_conn *
ic_to_icc(struct icl_conn * ic)71 ic_to_icc(struct icl_conn *ic)
72 {
73
74 return (__containerof(ic, struct icl_cxgbei_conn, ic));
75 }
76
77 /* PDU flags and signature. */
78 enum {
79 ICPF_RX_HDR = 1 << 0, /* PDU header received. */
80 ICPF_RX_FLBUF = 1 << 1, /* PDU payload received in a freelist. */
81 ICPF_RX_DDP = 1 << 2, /* PDU payload DDP'd. */
82 ICPF_RX_STATUS = 1 << 3, /* Rx status received. */
83
84 CXGBEI_PDU_SIGNATURE = 0x12344321
85 };
86
87 struct icl_cxgbei_pdu {
88 struct icl_pdu ip;
89
90 /* cxgbei specific stuff goes here. */
91 uint32_t icp_signature;
92 uint32_t icp_seq; /* For debug only */
93 u_int icp_flags;
94
95 u_int ref_cnt;
96 icl_pdu_cb cb;
97 int error;
98 };
99
100 static inline struct icl_cxgbei_pdu *
ip_to_icp(struct icl_pdu * ip)101 ip_to_icp(struct icl_pdu *ip)
102 {
103
104 return (__containerof(ip, struct icl_cxgbei_pdu, ip));
105 }
106
107 struct cxgbei_data {
108 u_int max_tx_data_len;
109 u_int max_rx_data_len;
110
111 u_int ddp_threshold;
112 struct ppod_region pr;
113
114 struct sysctl_ctx_list ctx; /* from uld_activate to deactivate */
115 };
116
117 #define CXGBEI_MAX_ISO_PAYLOAD 65535
118
119 /* cxgbei.c */
120 u_int cxgbei_select_worker_thread(struct icl_cxgbei_conn *);
121 void cwt_queue_for_tx(struct icl_cxgbei_conn *);
122 void parse_pdus(struct icl_cxgbei_conn *, struct sockbuf *);
123
124 /* icl_cxgbei.c */
125 void cwt_tx_main(void *);
126 int icl_cxgbei_mod_load(void);
127 int icl_cxgbei_mod_unload(void);
128 struct icl_pdu *icl_cxgbei_new_pdu(int);
129 void icl_cxgbei_new_pdu_set_conn(struct icl_pdu *, struct icl_conn *);
130 void icl_cxgbei_conn_pdu_free(struct icl_conn *, struct icl_pdu *);
131 struct cxgbei_cmp *cxgbei_find_cmp(struct icl_cxgbei_conn *, uint32_t);
132
133 #endif
134