xref: /titanic_41/usr/src/uts/common/io/ib/clients/rdsv3/ib_sysctl.c (revision 6a634c9dca3093f3922e4b7ab826d7bdf17bf78e)
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