| 1 |
145 |
lanttu |
/*
|
| 2 |
|
|
* Copyright (c) 2010, Mentor Graphics Corporation
|
| 3 |
|
|
* All rights reserved.
|
| 4 |
|
|
*
|
| 5 |
|
|
* Redistribution and use in source and binary forms, with or without
|
| 6 |
|
|
* modification, are permitted provided that the following conditions are met:
|
| 7 |
|
|
*
|
| 8 |
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
| 9 |
|
|
* this list of conditions and the following disclaimer.
|
| 10 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
| 11 |
|
|
* this list of conditions and the following disclaimer in the documentation
|
| 12 |
|
|
* and/or other materials provided with the distribution.
|
| 13 |
|
|
* 3. Neither the name of the <ORGANIZATION> nor the names of its contributors
|
| 14 |
|
|
* may be used to endorse or promote products derived from this software
|
| 15 |
|
|
* without specific prior written permission.
|
| 16 |
|
|
*
|
| 17 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
| 18 |
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 19 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 20 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
| 21 |
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
| 22 |
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
| 23 |
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
| 24 |
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
| 25 |
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
| 26 |
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
| 27 |
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
| 28 |
|
|
*/
|
| 29 |
|
|
|
| 30 |
|
|
|
| 31 |
|
|
|
| 32 |
|
|
#include <openmcapi.h>
|
| 33 |
|
|
|
| 34 |
|
|
extern MCAPI_BUF_QUEUE MCAPI_Buf_Wait_List;
|
| 35 |
|
|
|
| 36 |
|
|
/*************************************************************************
|
| 37 |
|
|
*
|
| 38 |
|
|
* FUNCTION
|
| 39 |
|
|
*
|
| 40 |
|
|
* pkt_rcv
|
| 41 |
|
|
*
|
| 42 |
|
|
* DESCRIPTION
|
| 43 |
|
|
*
|
| 44 |
|
|
* Receive a packet over a connected channel. Called by both
|
| 45 |
|
|
* blocking and non-blocking transmission routines.
|
| 46 |
|
|
*
|
| 47 |
|
|
* INPUTS
|
| 48 |
|
|
*
|
| 49 |
|
|
* receive_handle The local handle that is receiving the data.
|
| 50 |
|
|
* **buffer A pointer to a pointer that will be set to the
|
| 51 |
|
|
* memory address of the incoming buffer.
|
| 52 |
|
|
* *received_size The number of bytes received.
|
| 53 |
|
|
* *request A pointer to memory that will be filled in
|
| 54 |
|
|
* with data relevant to the operation, so the
|
| 55 |
|
|
* status of the operation can later be checked.
|
| 56 |
|
|
* *mcapi_status A pointer to memory that will be filled in
|
| 57 |
|
|
* with the status of the call.
|
| 58 |
|
|
* timeout The amount of time to block for the operation
|
| 59 |
|
|
* to complete.
|
| 60 |
|
|
*
|
| 61 |
|
|
* OUTPUTS
|
| 62 |
|
|
*
|
| 63 |
|
|
* None.
|
| 64 |
|
|
*
|
| 65 |
|
|
*************************************************************************/
|
| 66 |
|
|
void pkt_rcv(mcapi_pktchan_recv_hndl_t receive_handle, void **buffer,
|
| 67 |
|
|
size_t *received_size, mcapi_request_t *request,
|
| 68 |
|
|
mcapi_status_t *mcapi_status, mcapi_uint32_t timeout)
|
| 69 |
|
|
{
|
| 70 |
|
|
MCAPI_GLOBAL_DATA *node_data;
|
| 71 |
|
|
MCAPI_ENDPOINT *rx_endp_ptr = MCAPI_NULL;
|
| 72 |
|
|
mcapi_port_t port_id;
|
| 73 |
|
|
mcapi_node_t node_id;
|
| 74 |
|
|
MCAPI_BUFFER *rx_buf = MCAPI_NULL;
|
| 75 |
|
|
|
| 76 |
|
|
/* Validate mcapi_status. */
|
| 77 |
|
|
if (mcapi_status)
|
| 78 |
|
|
{
|
| 79 |
|
|
/* Validate the input parameters. */
|
| 80 |
|
|
if ( (request) && (received_size) && (buffer) )
|
| 81 |
|
|
{
|
| 82 |
|
|
/* Initialize bytes received to zero. */
|
| 83 |
|
|
*received_size = 0;
|
| 84 |
|
|
request->mcapi_byte_count = 0;
|
| 85 |
|
|
|
| 86 |
|
|
/* Lock the global data structure. */
|
| 87 |
|
|
mcapi_lock_node_data();
|
| 88 |
|
|
|
| 89 |
|
|
/* Get a pointer to the global node list. */
|
| 90 |
|
|
node_data = mcapi_get_node_data();
|
| 91 |
|
|
|
| 92 |
|
|
/* Get a pointer to the endpoint that is receiving data. */
|
| 93 |
|
|
rx_endp_ptr = mcapi_decode_local_endpoint(node_data, &node_id,
|
| 94 |
|
|
&port_id,
|
| 95 |
|
|
receive_handle,
|
| 96 |
|
|
mcapi_status);
|
| 97 |
|
|
|
| 98 |
|
|
/* Ensure the receive endpoint is valid. */
|
| 99 |
|
|
if (rx_endp_ptr)
|
| 100 |
|
|
{
|
| 101 |
|
|
/* Ensure this is a receive endpoint. */
|
| 102 |
|
|
if (rx_endp_ptr->mcapi_state & MCAPI_ENDP_RX)
|
| 103 |
|
|
{
|
| 104 |
|
|
/* Ensure the handle is for a packet channel. */
|
| 105 |
|
|
if (rx_endp_ptr->mcapi_chan_type == MCAPI_CHAN_PKT_TYPE)
|
| 106 |
|
|
{
|
| 107 |
|
|
/* Initialize the request structure. */
|
| 108 |
|
|
mcapi_init_request(request, MCAPI_REQ_RX_FIN);
|
| 109 |
|
|
|
| 110 |
|
|
/* Set up the request structure. */
|
| 111 |
|
|
request->mcapi_target_endp = receive_handle;
|
| 112 |
|
|
request->mcapi_chan_type = MCAPI_CHAN_PKT_TYPE;
|
| 113 |
|
|
|
| 114 |
|
|
/* Set the request structure's buffer to the
|
| 115 |
|
|
* application's buffer that will be filled in when
|
| 116 |
|
|
* data is received.
|
| 117 |
|
|
*/
|
| 118 |
|
|
request->mcapi_pkt = buffer;
|
| 119 |
|
|
|
| 120 |
|
|
/* Check if there is data on the endpoint. */
|
| 121 |
|
|
if (rx_endp_ptr->mcapi_rx_queue.head)
|
| 122 |
|
|
{
|
| 123 |
|
|
/* Remove the buffer from the queue. */
|
| 124 |
|
|
rx_buf =
|
| 125 |
|
|
mcapi_dequeue(&rx_endp_ptr->mcapi_rx_queue);
|
| 126 |
|
|
|
| 127 |
|
|
/* Set the user buffer to the incoming buffer. */
|
| 128 |
|
|
*buffer = &rx_buf->buf_ptr[MCAPI_HEADER_LEN];
|
| 129 |
|
|
|
| 130 |
|
|
/* Set the size of the incoming buffer. */
|
| 131 |
|
|
*received_size = rx_buf->buf_size - MCAPI_HEADER_LEN;
|
| 132 |
|
|
|
| 133 |
|
|
/* Add the receive buffer structure to the list of
|
| 134 |
|
|
* buffers waiting to be freed by the application.
|
| 135 |
|
|
*/
|
| 136 |
|
|
mcapi_enqueue(&MCAPI_Buf_Wait_List, rx_buf);
|
| 137 |
|
|
|
| 138 |
|
|
/* Set the number of bytes in the request structure. */
|
| 139 |
|
|
request->mcapi_byte_count = *received_size;
|
| 140 |
|
|
|
| 141 |
|
|
/* Indicate completion of the operation. */
|
| 142 |
|
|
*mcapi_status =
|
| 143 |
|
|
request->mcapi_status = MCAPI_SUCCESS;
|
| 144 |
|
|
}
|
| 145 |
|
|
|
| 146 |
|
|
/* If there is no data waiting on the endpoint, ensure the
|
| 147 |
|
|
* endpoint is still part of a connection before blocking for
|
| 148 |
|
|
* data.
|
| 149 |
|
|
*/
|
| 150 |
|
|
else if (rx_endp_ptr->mcapi_state & MCAPI_ENDP_CONNECTED)
|
| 151 |
|
|
{
|
| 152 |
|
|
/* If this is a blocking request, suspend until the
|
| 153 |
|
|
* operation has completed or been canceled.
|
| 154 |
|
|
*/
|
| 155 |
|
|
if (timeout)
|
| 156 |
|
|
{
|
| 157 |
|
|
MCAPI_Suspend_Task(node_data, request,
|
| 158 |
|
|
&request->mcapi_cond,
|
| 159 |
|
|
MCAPI_TIMEOUT_INFINITE);
|
| 160 |
|
|
|
| 161 |
|
|
/* Return the number of bytes received. */
|
| 162 |
|
|
*received_size = request->mcapi_byte_count;
|
| 163 |
|
|
|
| 164 |
|
|
/* Set the return status. */
|
| 165 |
|
|
*mcapi_status = request->mcapi_status;
|
| 166 |
|
|
}
|
| 167 |
|
|
|
| 168 |
|
|
/* This is a non-blocking receive. */
|
| 169 |
|
|
else
|
| 170 |
|
|
{
|
| 171 |
|
|
/* Add the application's request structure to
|
| 172 |
|
|
* the list of pending requests for the node.
|
| 173 |
|
|
*/
|
| 174 |
|
|
mcapi_enqueue(&node_data->mcapi_local_req_queue, request);
|
| 175 |
|
|
|
| 176 |
|
|
/* Indicate completion of the operation. */
|
| 177 |
|
|
*mcapi_status = MCAPI_SUCCESS;
|
| 178 |
|
|
}
|
| 179 |
|
|
}
|
| 180 |
|
|
|
| 181 |
|
|
/* The connection has been closed. */
|
| 182 |
|
|
else
|
| 183 |
|
|
{
|
| 184 |
|
|
*mcapi_status = MCAPI_ERR_CHAN_INVALID;
|
| 185 |
|
|
}
|
| 186 |
|
|
}
|
| 187 |
|
|
|
| 188 |
|
|
/* The handle is for a scalar channel. */
|
| 189 |
|
|
else
|
| 190 |
|
|
{
|
| 191 |
|
|
*mcapi_status = MCAPI_ERR_CHAN_TYPE;
|
| 192 |
|
|
}
|
| 193 |
|
|
}
|
| 194 |
|
|
|
| 195 |
|
|
/* Attempting to receive on a send handle. */
|
| 196 |
|
|
else if (rx_endp_ptr->mcapi_state & MCAPI_ENDP_TX)
|
| 197 |
|
|
{
|
| 198 |
|
|
*mcapi_status = MCAPI_ERR_CHAN_DIRECTION;
|
| 199 |
|
|
}
|
| 200 |
|
|
|
| 201 |
|
|
/* The receive side has been closed. */
|
| 202 |
|
|
else
|
| 203 |
|
|
{
|
| 204 |
|
|
*mcapi_status = MCAPI_ERR_CHAN_INVALID;
|
| 205 |
|
|
}
|
| 206 |
|
|
}
|
| 207 |
|
|
|
| 208 |
|
|
else
|
| 209 |
|
|
{
|
| 210 |
|
|
*mcapi_status = MCAPI_ERR_CHAN_INVALID;
|
| 211 |
|
|
}
|
| 212 |
|
|
|
| 213 |
|
|
/* Unlock the global data structure. */
|
| 214 |
|
|
mcapi_unlock_node_data();
|
| 215 |
|
|
}
|
| 216 |
|
|
|
| 217 |
|
|
/* The request structure is invalid. */
|
| 218 |
|
|
else
|
| 219 |
|
|
{
|
| 220 |
|
|
*mcapi_status = MCAPI_ERR_PARAMETER;
|
| 221 |
|
|
}
|
| 222 |
|
|
}
|
| 223 |
|
|
|
| 224 |
|
|
}
|
