dapl_ep_post_recv.c revision 9517:b4839b0aa7a4 
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 2009 Sun Microsystems, Inc.  All rights reserved.
28 * Use is subject to license terms.
29 */
30
31/*
32 *
33 * MODULE: dapl_ep_post_recv.c
34 *
35 * PURPOSE: Endpoint management
36 * Description: Interfaces in this file are completely described in
37 *		the DAPL 1.1 API, Chapter 6, section 5
38 *
39 * $Id: dapl_ep_post_recv.c,v 1.17 2003/07/30 18:13:37 hobie16 Exp $
40 */
41
42#include "dapl.h"
43#include "dapl_cookie.h"
44#include "dapl_adapter_util.h"
45
46/*
47 * dapl_ep_post_recv
48 *
49 * DAPL Requirements Version xxx, 6.5.11
50 *
51 * Request to receive data over the connection of ep handle into
52 * local_iov
53 *
54 * Input:
55 * 	ep_handle
56 * 	num_segments
57 * 	local_iov
58 * 	user_cookie
59 * 	completion_flags
60 *
61 * Output:
62 * 	None.
63 *
64 * Returns:
65 * 	DAT_SUCCESS
66 * 	DAT_INSUFFICIENT_RESOURCES
67 * 	DAT_INVALID_PARAMETER
68 * 	DAT_INVALID_STATE
69 * 	DAT_PROTECTION_VIOLATION
70 * 	DAT_PROVILEGES_VIOLATION
71 */
72DAT_RETURN
73dapl_ep_post_recv(
74	IN	DAT_EP_HANDLE		ep_handle,
75	IN	DAT_COUNT		num_segments,
76	IN	DAT_LMR_TRIPLET		*local_iov,
77	IN	DAT_DTO_COOKIE		user_cookie,
78	IN	DAT_COMPLETION_FLAGS	completion_flags)
79{
80	DAPL_EP 		*ep_ptr;
81	DAPL_COOKIE		*cookie;
82	DAT_RETURN		dat_status;
83
84	dapl_dbg_log(DAPL_DBG_TYPE_API,
85	    "dapl_ep_post_recv (%p, %d, %p, %P, %x)\n",
86	    ep_handle,
87	    num_segments,
88	    local_iov,
89	    user_cookie.as_64,
90	    completion_flags);
91
92	if (DAPL_BAD_HANDLE(ep_handle, DAPL_MAGIC_EP)) {
93		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
94		    DAT_INVALID_HANDLE_EP);
95		goto bail;
96	}
97
98	ep_ptr = (DAPL_EP *) ep_handle;
99
100	/* dat_ep_post_recv is not supported on EPs with SRQ */
101	if (ep_ptr->srq_attached) {
102		dat_status = DAT_ERROR(DAT_INVALID_STATE, 0);
103		goto bail;
104	}
105
106	/*
107	 * Synchronization ok since this buffer is only used for receive
108	 * requests, which aren't allowed to race with each other.
109	 */
110	dat_status = dapls_dto_cookie_alloc(&ep_ptr->recv_buffer,
111	    DAPL_DTO_TYPE_RECV,
112	    user_cookie,
113	    &cookie);
114	if (DAT_SUCCESS != dat_status) {
115		goto bail;
116	}
117
118	/*
119	 * Invoke provider specific routine to post DTO
120	 */
121	if (num_segments != 1 ||
122	    completion_flags != DAT_COMPLETION_DEFAULT_FLAG)
123		dat_status = dapls_ib_post_recv(ep_ptr, cookie, num_segments,
124		    local_iov, completion_flags);
125	else
126		dat_status = dapls_ib_post_recv_one(ep_ptr, cookie, local_iov);
127
128	if (dat_status != DAT_SUCCESS) {
129		dapls_cookie_dealloc(&ep_ptr->recv_buffer, cookie);
130	} else {
131		dapl_os_atomic_inc(&ep_ptr->recv_count);
132	}
133
134bail:
135	dapl_dbg_log(DAPL_DBG_TYPE_RTN,
136	    "dapl_ep_post_recv () returns 0x%x\n", dat_status);
137
138	return (dat_status);
139}
140