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 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