1 /*
2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
3 */
4
5 /*
6 * This file contains code imported from the OFED rds source file ib_sysctl.c
7 * Oracle elects to have and use the contents of ib_sysctl.c under and governed
8 * by the OpenIB.org BSD license (see below for full license text). However,
9 * the following notice accompanied the original version of this file:
10 */
11
12 /*
13 * Copyright (c) 2006 Oracle. All rights reserved.
14 *
15 * This software is available to you under a choice of one of two
16 * licenses. You may choose to be licensed under the terms of the GNU
17 * General Public License (GPL) Version 2, available from the file
18 * COPYING in the main directory of this source tree, or the
19 * OpenIB.org BSD license below:
20 *
21 * Redistribution and use in source and binary forms, with or
22 * without modification, are permitted provided that the following
23 * conditions are met:
24 *
25 * - Redistributions of source code must retain the above
26 * copyright notice, this list of conditions and the following
27 * disclaimer.
28 *
29 * - Redistributions in binary form must reproduce the above
30 * copyright notice, this list of conditions and the following
31 * disclaimer in the documentation and/or other materials
32 * provided with the distribution.
33 *
34 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
35 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
36 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
37 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
38 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
39 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
40 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
41 * SOFTWARE.
42 *
43 */
44 #include <sys/ib/clients/rdsv3/ib.h>
45 #include <sys/ib/clients/rdsv3/rdsv3_debug.h>
46
47 unsigned long rdsv3_ib_sysctl_max_send_wr = RDSV3_IB_DEFAULT_SEND_WR;
48 unsigned long rdsv3_ib_sysctl_max_recv_wr = RDSV3_IB_DEFAULT_RECV_WR;
49 unsigned long rdsv3_ib_sysctl_max_recv_allocation = RDSV3_IB_MAX_RECV_ALLOC;
50 /* hardware will fail CQ creation long before this */
51
52 unsigned long rdsv3_ib_sysctl_max_unsig_wrs = 16;
53
54 unsigned long rdsv3_ib_sysctl_max_unsig_bytes = (16 << 20);
55
56 unsigned long rdsv3_max_bcopy_size;
57
58 /*
59 * This sysctl does nothing.
60 *
61 * Backwards compatibility with RDS 3.0 wire protocol
62 * disables initial FC credit exchange.
63 * If it's ever possible to drop 3.0 support,
64 * setting this to 1 and moving init/refill of send/recv
65 * rings from ib_cm_connect_complete() back into ib_setup_qp()
66 * will cause credits to be added before protocol negotiation.
67 */
68 unsigned int rdsv3_ib_sysctl_flow_control = 0;
69
70 void
rdsv3_ib_sysctl_exit(void)71 rdsv3_ib_sysctl_exit(void)
72 {
73 }
74
75 int
rdsv3_ib_sysctl_init(void)76 rdsv3_ib_sysctl_init(void)
77 {
78 RDSV3_DPRINTF2("rdsv3_ib_sysctl_init",
79 "rdsv3_ib_sysctl_max_send_wr = 0x%lx "
80 "rdsv3_ib_sysctl_max_recv_wr = 0x%lx "
81 "rdsv3_ib_sysctl_max_recv_allocation = 0x%lx "
82 "rdsv3_ib_sysctl_max_unsig_wrs = 0x%lx "
83 "rdsv3_ib_sysctl_max_unsig_bytes = 0x%lx "
84 "rdsv3_ib_sysctl_flow_control = 0x%x",
85 rdsv3_ib_sysctl_max_send_wr,
86 rdsv3_ib_sysctl_max_recv_wr,
87 rdsv3_ib_sysctl_max_recv_allocation,
88 rdsv3_ib_sysctl_max_unsig_wrs,
89 rdsv3_ib_sysctl_max_unsig_bytes,
90 rdsv3_ib_sysctl_flow_control);
91
92 rdsv3_max_bcopy_size = rdsv3_ib_sysctl_max_send_wr * RDSV3_FRAG_SIZE;
93 return (0);
94 }
95