source: edk_user_repository/WARP/sw_services/WARP_ip_udp_v1_00_a/src/WARP_ip_udp_init.c

Last change on this file was 4696, checked in by welsh, 7 years ago

Adding WARP IP/UDP transport.

File size: 6.3 KB
Line 
1/** @file  WARP_ip_udp_init.c
2 *  @brief WARP IP/UDP Library (Initialization)
3 *
4 *  @copyright Copyright 2015, Mango Communications. All rights reserved.
5 *          Distributed under the WARP license  (http://warpproject.org/license)
6 *
7 *  @author Chris Hunter (chunter [at] mangocomm.com)
8 *  @author Patrick Murphy (murphpo [at] mangocomm.com)
9 *  @author Erik Welsh (welsh [at] mangocomm.com)
10 */
11
12// NOTE:  Many data structures in the WARP IP/UDP Library must be accessible to DMAs
13// and other system level masters.  Therefore, we have put those variables in their
14// own linker section, ".eth_data", so that it is easy to put that section into an
15// appropriate memory within the system.
16//
17//   This will require custom modification of the linker script since the Xilinx SDK
18// can not detect these section headers ahead of time so that they can be placed as
19// part of the GUI section placement.
20//
21
22/***************************** Include Files *********************************/
23
24// Xilinx / Standard library includes
25#include <xparameters.h>
26#include <xstatus.h>
27#include <stdlib.h>
28#include <stdio.h>
29#include <string.h>
30
31// WARP IP/UDP Library includes
32#include "WARP_ip_udp.h"
33#include "WARP_ip_udp_internal.h"
34
35
36/*************************** Constant Definitions ****************************/
37
38
39/*********************** Global Variable Definitions *************************/
40
41
42/*************************** Variable Definitions ****************************/
43
44// Send buffers for all Ethernet devices
45u32                          ETH_allocated_send_buffers;
46u32                          ETH_send_buffer[WARP_IP_UDP_ETH_NUM_SEND_BUF * (WARP_IP_UDP_ETH_BUF_SIZE >> 2)] __attribute__ ((aligned(WARP_IP_UDP_BUFFER_ALIGNMENT))) __attribute__ ((section (".eth_data")));
47warp_ip_udp_buffer           ETH_send_buffers[WARP_IP_UDP_ETH_NUM_SEND_BUF];
48
49// Memory for minimum length dummy Ethernet Frame
50//     NOTE:  Memory for the frame must be accessible by the DMA
51//
52u8                           ETH_dummy_frame[ETH_MIN_FRAME_LEN] __attribute__ ((aligned(WARP_IP_UDP_BUFFER_ALIGNMENT))) __attribute__ ((section (".eth_data")));
53
54// Socket data structures
55//     NOTE:  Memory for the IP/UDP headers must be accessible by the DMA
56//
57warp_ip_udp_header           ETH_headers[WARP_IP_UDP_NUM_SOCKETS] __attribute__ ((aligned(WARP_IP_UDP_BUFFER_ALIGNMENT))) __attribute__ ((section (".eth_data")));
58warp_ip_udp_socket           ETH_sockets[WARP_IP_UDP_NUM_SOCKETS];
59
60// ARP Table data structures
61//     NOTE:  There is only a single ARP table for all Ethernet devices.
62//
63arp_cache_entry              ETH_arp_cache[WARP_IP_UDP_NUM_ARP_ENTRIES];
64
65
66/*************************** Function Prototypes *****************************/
67
68
69/******************************** Functions **********************************/
70
71
72/*****************************************************************************/
73/**
74 * Initialize the global Ethernet structures
75 *
76 * @param   None
77 *
78 * @return  None
79 *
80 ******************************************************************************/
81void eth_init_global_structures() {
82    u32 i;
83    u32 temp;
84   
85    // Initialize dummy Ethernet frame
86    bzero(ETH_dummy_frame, ETH_MIN_FRAME_LEN);
87
88    // Initialize the send buffer pool
89    ETH_allocated_send_buffers = 0;
90       
91    // Initialize each IP/UDP buffer in the send buffer pool
92    for (i = 0; i < WARP_IP_UDP_ETH_NUM_SEND_BUF; i++) {
93        temp = ((u32)(&ETH_send_buffer) + (i * (WARP_IP_UDP_ETH_BUF_SIZE >> 2)) + WARP_IP_UDP_ETH_TX_BUF_ALIGNMENT);
94   
95        ETH_send_buffers[i].state                = WARP_IP_UDP_BUFFER_FREE;
96        ETH_send_buffers[i].max_size             = WARP_IP_UDP_ETH_BUF_SIZE;
97        ETH_send_buffers[i].size                 = 0;
98        ETH_send_buffers[i].data                 = (u8 *) temp;
99        ETH_send_buffers[i].offset               = (u8 *) temp;
100        ETH_send_buffers[i].length               = 0;
101        ETH_send_buffers[i].descriptor           = NULL;
102    }
103}
104
105
106
107/*****************************************************************************/
108/**
109 * Initialize the Socket structures
110 *
111 * @param   None
112 *
113 * @return  None
114 *
115 ******************************************************************************/
116void socket_init_sockets() {
117    u32 i;
118   
119    // Initialize all the sockets
120    for (i = 0; i < WARP_IP_UDP_NUM_SOCKETS; i++) {
121        ETH_sockets[i].index       = i;
122        ETH_sockets[i].state       = SOCKET_CLOSED;
123        ETH_sockets[i].eth_dev_num = WARP_IP_UDP_INVALID_ETH_DEVICE;
124        ETH_sockets[i].hdr         = &(ETH_headers[i]);
125    }
126}
127
128
129
130/*****************************************************************************/
131/**
132 * Initialize the ARP cache structure
133 *
134 * @param   None
135 *
136 * @return  None
137 *
138 ******************************************************************************/
139void arp_init_cache() {
140    u32 i;
141
142    // Initialize ARP table
143    for (i = 0; i < WARP_IP_UDP_NUM_ARP_ENTRIES; i++) {
144        // Zero out the entry
145        bzero((void *)&(ETH_arp_cache[i]), sizeof(arp_cache_entry));
146       
147        // Set the Ethernet device to the invalid Ethernet device
148        ETH_arp_cache[i].eth_dev_num = WARP_IP_UDP_INVALID_ETH_DEVICE;
149    }
150}
151
152
153
154/*****************************************************************************/
155/**
156 * Initialize the IP/UDP Library
157 *
158 * This function will initialize all subsystems within the library:
159 *   - Global Ethernet structures
160 *   - Socket data structures
161 *   - ARP cache
162 *   - IP V4 global structures (ie ID counter)
163 *
164 * @param   None
165 *
166 * @return  int              - Status of the command:
167 *                                 XST_SUCCESS - Command completed successfully
168 *                                 XST_FAILURE - There was an error in the command
169 *
170 ******************************************************************************/
171int warp_ip_udp_init() {
172
173    // Initialize the global ethernet structures
174    eth_init_global_structures();
175   
176    // Initialize the sockets
177    socket_init_sockets();
178   
179    // Initialize the ARP cache
180    arp_init_cache();
181   
182    // Initialize the IP v4 global structures
183    ipv4_init();
184
185    // Return success
186    return XST_SUCCESS;
187}
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