2
* Unix SMB/CIFS implementation.
3
* Wrap Infiniband calls.
5
* Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
7
* Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
9
* This program is free software; you can redistribute it and/or modify
10
* it under the terms of the GNU General Public License as published by
11
* the Free Software Foundation; either version 3 of the License, or
12
* (at your option) any later version.
14
* This program is distributed in the hope that it will be useful,
15
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
* GNU General Public License for more details.
19
* You should have received a copy of the GNU General Public License
20
* along with this program; if not, see <http://www.gnu.org/licenses/>.
26
uint32_t recv_bufsize;
27
uint32_t recv_threshold;
31
char *buf; /* initialized in ibw_init_memory once per connection */
32
int wr_id; /* position in wr_index list; also used as wr id */
34
char *buf_large; /* allocated specially for "large" message */
35
struct ibv_mr *mr_large;
36
int ref_cnt; /* reference count for ibw_wc_send to know when to release */
38
char *queued_msg; /* set at ibw_send - can be different than above */
39
int queued_ref_cnt; /* instead of adding the same to the queue again */
40
uint32_t queued_rlen; /* last wins when queued_ref_cnt>0; or simple msg size */
42
struct ibw_wr *next, *prev; /* in wr_list_avail or wr_list_used */
43
/* or extra_sent or extra_avail */
44
struct ibw_wr *qnext, *qprev; /* in queue */
48
struct event_context *ectx;
52
struct rdma_cm_id *cm_id; /* server cm id */
54
struct rdma_event_channel *cm_channel;
55
struct fd_event *cm_channel_event;
57
ibw_connstate_fn_t connstate_func; /* see ibw_init */
58
ibw_receive_fn_t receive_func; /* see ibw_init */
60
long pagesize; /* sysconf result for memalign */
64
char *buf; /* talloced memory buffer */
65
uint32_t bufsize; /* allocated size of buf - always grows */
66
uint32_t len; /* message part length */
67
uint32_t to_read; /* 4 or *((uint32_t)buf) if len>=sizeof(uint32_t) */
70
struct ibw_conn_priv {
71
struct ibv_comp_channel *verbs_channel;
72
struct fd_event *verbs_channel_event;
74
struct rdma_cm_id *cm_id; /* client's cm id */
78
struct ibv_cq *cq; /* qp is in cm_id */
80
char *buf_send; /* max_send_wr * avg_send_size */
81
struct ibv_mr *mr_send;
82
struct ibw_wr *wr_list_avail;
83
struct ibw_wr *wr_list_used;
84
struct ibw_wr **wr_index; /* array[0..(qsize-1)] of (ibw_wr *) */
85
int wr_sent; /* # of send wrs in the CQ */
87
struct ibw_wr *extra_sent;
88
struct ibw_wr *extra_avail;
89
int extra_max; /* max wr_id in the queue */
93
/* buf_recv is a ring buffer */
94
char *buf_recv; /* max_recv_wr * avg_recv_size */
95
struct ibv_mr *mr_recv;
96
int recv_index; /* index of the next recv buffer when refilling */
100
/* remove an element from a list - element doesn't have to be in list. */
101
#define DLIST_REMOVE2(list, p, prev, next) \
103
if ((p) == (list)) { \
104
(list) = (p)->next; \
105
if (list) (list)->prev = NULL; \
107
if ((p)->prev) (p)->prev->next = (p)->next; \
108
if ((p)->next) (p)->next->prev = (p)->prev; \
110
if ((p) != (list)) (p)->next = (p)->prev = NULL; \
113
/* hook into the end of the list - needs a tmp pointer */
114
#define DLIST_ADD_END2(list, p, type, prev, next) \
118
(p)->next = (p)->prev = NULL; \
121
for (tmp = (list); tmp->next; tmp = tmp->next) ; \