1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
24 */
25
26 /*
27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 /*
32 *
33 * MODULE: dapl_evd_resize.c
34 *
35 * PURPOSE: EVENT management
36 *
37 * Description: Interfaces in this file are completely defined in
38 * the uDAPL 1.1 API, Chapter 6, section 3
39 *
40 * $Id: dapl_evd_resize.c,v 1.4 2003/06/16 17:53:32 sjs2 Exp $
41 */
42
43 #include "dapl_evd_util.h"
44 #include "dapl_ring_buffer_util.h"
45 #include "dapl_adapter_util.h"
46 #include "dapl.h"
47
48 #define DAPL_MIN_RESZ_QLEN 4096
49
50 /*
51 * dapl_evd_resize
52 *
53 * DAPL Requirements Version xxx, 6.3.2.5
54 *
55 * Modify the size fo the event queue of an Event Dispatcher
56 *
57 * Input:
58 * evd_handle
59 * evd_qlen
60 *
61 * Output:
62 * none
63 *
64 * Returns:
65 * DAT_SUCCESS
66 * DAT_INVALID_PARAMETER
67 * DAT_INSUFFICIENT_RESOURCES
68 * DAT_INVALID_STATE
69 */
70
dapl_evd_resize(IN DAT_EVD_HANDLE evd_handle,IN DAT_COUNT req_evd_qlen)71 DAT_RETURN dapl_evd_resize(
72 IN DAT_EVD_HANDLE evd_handle,
73 IN DAT_COUNT req_evd_qlen)
74 {
75 int i;
76 DAPL_EVD *evd_ptr;
77 DAT_EVENT *event_ptr;
78 DAT_EVENT *eventp;
79 DAT_EVENT *event;
80 DAT_EVENT *new_event;
81 DAPL_RING_BUFFER free_event_queue;
82 DAPL_RING_BUFFER pending_event_queue;
83 DAT_RETURN dat_status;
84 DAT_COUNT max_evd_qlen;
85 DAT_COUNT evd_qlen;
86
87 evd_ptr = (DAPL_EVD *)evd_handle;
88 dat_status = DAT_SUCCESS;
89
90 if (DAPL_BAD_HANDLE(evd_handle, DAPL_MAGIC_EVD)) {
91 return (DAT_ERROR(DAT_INVALID_HANDLE, 0));
92 }
93
94 if (req_evd_qlen < evd_ptr->qlen) {
95 return (DAT_ERROR(DAT_INVALID_STATE, 0));
96 }
97
98 if (req_evd_qlen == evd_ptr->qlen) {
99 return (DAT_SUCCESS);
100 }
101
102 max_evd_qlen = evd_ptr->header.owner_ia->hca_ptr->ia_attr.max_evd_qlen;
103 if (req_evd_qlen > max_evd_qlen) {
104 return (DAT_ERROR(DAT_INVALID_STATE, 0));
105 }
106
107 evd_qlen = DAPL_MIN_RESZ_QLEN;
108 while (req_evd_qlen > evd_qlen) {
109 evd_qlen <<= 1;
110 if (evd_qlen > max_evd_qlen)
111 evd_qlen = max_evd_qlen;
112 }
113
114 /* Allocate EVENTs */
115 event_ptr = (DAT_EVENT *) dapl_os_alloc(evd_qlen * sizeof (DAT_EVENT));
116 if (!event_ptr) {
117 return (DAT_ERROR(DAT_INSUFFICIENT_RESOURCES,
118 DAT_RESOURCE_MEMORY));
119 }
120
121 /* allocate free event queue */
122 dat_status = dapls_rbuf_alloc(&free_event_queue, evd_qlen);
123 if (dat_status != DAT_SUCCESS) {
124 goto bail;
125 }
126
127 /* allocate pending event queue */
128 dat_status = dapls_rbuf_alloc(&pending_event_queue, evd_qlen);
129 if (dat_status != DAT_SUCCESS) {
130 goto bail;
131 }
132
133 /* need to resize the cq only for DTO/BIND evds */
134 if (0 != (evd_ptr->evd_flags & ~ (DAT_EVD_SOFTWARE_FLAG |
135 DAT_EVD_CONNECTION_FLAG | DAT_EVD_CR_FLAG))) {
136 dat_status = dapls_ib_cq_resize(evd_ptr, evd_qlen);
137 if (dat_status != DAT_SUCCESS)
138 goto bail;
139 }
140
141 /* add events to free event queue */
142 for (i = 0, eventp = event_ptr; i < evd_qlen; i++) {
143 (void) dapls_rbuf_add(&free_event_queue, (void *)eventp);
144 eventp++;
145 }
146 /*
147 * copy pending events from evd to the new pending event queue
148 */
149 while (event = (DAT_EVENT *)
150 dapls_rbuf_remove(&evd_ptr->pending_event_queue)) {
151 new_event = (DAT_EVENT *) dapls_rbuf_remove(&free_event_queue);
152 dapl_os_assert(new_event);
153 (void) dapl_os_memcpy(new_event, event, sizeof (DAT_EVENT));
154 dat_status = dapls_rbuf_add(&pending_event_queue, new_event);
155 dapl_os_assert(dat_status == DAT_SUCCESS);
156 dat_status = dapls_rbuf_add(&evd_ptr->free_event_queue, event);
157 dapl_os_assert(dat_status == DAT_SUCCESS);
158 }
159
160 dapls_rbuf_destroy(&evd_ptr->free_event_queue);
161 dapls_rbuf_destroy(&evd_ptr->pending_event_queue);
162 if (evd_ptr->events) {
163 dapl_os_free(evd_ptr->events,
164 evd_ptr->qlen * sizeof (DAT_EVENT));
165 }
166 evd_ptr->events = event_ptr;
167 evd_ptr->free_event_queue = free_event_queue;
168 evd_ptr->pending_event_queue = pending_event_queue;
169 evd_ptr->qlen = evd_qlen;
170
171 return (DAT_SUCCESS);
172 bail:
173 /*
174 * If we are here means event_ptr was allocd but something else
175 * failed
176 */
177 dapl_os_free(event_ptr, evd_qlen * sizeof (DAT_EVENT));
178 dapls_rbuf_destroy(&free_event_queue);
179 dapls_rbuf_destroy(&pending_event_queue);
180
181 return (dat_status);
182 }
183