[1740] | 1 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 2 | // Copyright (c) 2004 Xilinx, Inc. All rights reserved. |
---|
| 3 | // |
---|
| 4 | // Xilinx, Inc. |
---|
| 5 | // XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A |
---|
| 6 | // COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS |
---|
| 7 | // ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR |
---|
| 8 | // STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION |
---|
| 9 | // IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE |
---|
| 10 | // FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. |
---|
| 11 | // XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO |
---|
| 12 | // THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO |
---|
| 13 | // ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE |
---|
| 14 | // FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY |
---|
| 15 | // AND FITNESS FOR A PARTICULAR PURPOSE. |
---|
| 16 | // |
---|
| 17 | // File : eth.c |
---|
| 18 | // Date : 2002, March 20. |
---|
| 19 | // Author : Sathya Thammanur |
---|
| 20 | // Company: Xilinx |
---|
| 21 | // Group : Emerging Software Technologies |
---|
| 22 | // |
---|
| 23 | // Summary: |
---|
| 24 | // Ethernet layer specific functions |
---|
| 25 | // |
---|
| 26 | // $Id: eth.c,v 1.2.8.6 2005/11/15 23:41:10 salindac Exp $ |
---|
| 27 | // |
---|
| 28 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 29 | |
---|
[1749] | 30 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 31 | // see copyright.txt for Rice University/Mango Communications modifications |
---|
| 32 | //////////////////////////////////////////////////////////////////////////////// |
---|
| 33 | |
---|
[1740] | 34 | #include <string.h> |
---|
| 35 | #include <xilnet_config.h> |
---|
[1745] | 36 | #include <xilnet_xilsock.h> |
---|
[1743] | 37 | #ifdef _CONFIG_TEMAC_ |
---|
[1740] | 38 | #include "xlltemac.h" |
---|
| 39 | #include "xllfifo.h" |
---|
| 40 | #include "xdmacentral.h" |
---|
| 41 | #include "xdmacentral_l.h" |
---|
[1743] | 42 | #endif |
---|
| 43 | #include "xio.h" |
---|
[1740] | 44 | #include "stdio.h" |
---|
| 45 | struct xilnet_hw_addr_table xilnet_hw_tbl[HW_ADDR_TBL_ENTRIES]; |
---|
| 46 | unsigned char ishwaddrinit = 0; |
---|
| 47 | static unsigned long long curr_age = 0; |
---|
| 48 | |
---|
| 49 | |
---|
| 50 | /* |
---|
| 51 | * initialize xilnet hardware address |
---|
| 52 | */ |
---|
| 53 | void xilnet_eth_init_hw_addr(unsigned char* addr) { |
---|
| 54 | int k = 0; |
---|
| 55 | int j; |
---|
| 56 | int sum = 0; |
---|
| 57 | int val = 0; |
---|
| 58 | |
---|
| 59 | for (j = 0; j < 5; j++) { |
---|
| 60 | |
---|
| 61 | // parse input for colon separated hw address |
---|
| 62 | while(addr[k] != ':') { |
---|
| 63 | if (addr[k] >= 'a' && addr[k] <= 'f') |
---|
| 64 | val = addr[k] - 'a' + 10; |
---|
| 65 | else if (addr[k] >= 'A' && addr[k] <= 'F') |
---|
| 66 | val = addr[k] - 'A' + 10; |
---|
| 67 | else |
---|
| 68 | val = addr[k] - '0'; |
---|
| 69 | sum = sum * 16 + val; |
---|
| 70 | k++; |
---|
| 71 | } |
---|
| 72 | |
---|
| 73 | k++; // move over the colon |
---|
| 74 | mb_hw_addr[j] = (unsigned char) sum; |
---|
| 75 | sum = 0; |
---|
| 76 | } |
---|
| 77 | |
---|
| 78 | // read last byte of hw address |
---|
| 79 | while (addr[k] != '\0') { |
---|
| 80 | if (addr[k] >= 'a' && addr[k] <= 'f') |
---|
| 81 | val = addr[k] - 'a' + 10; |
---|
| 82 | else if (addr[k] >= 'A' && addr[k] <= 'F') |
---|
| 83 | val = addr[k] - 'A' + 10; |
---|
| 84 | else |
---|
| 85 | val = addr[k] - '0'; |
---|
| 86 | sum = sum * 16 + val; |
---|
| 87 | k++; |
---|
| 88 | } |
---|
| 89 | mb_hw_addr[5] = (unsigned char) sum; |
---|
| 90 | } |
---|
| 91 | |
---|
[1743] | 92 | #ifdef _CONFIG_TEMAC_ |
---|
[1740] | 93 | inline void waitForDMA() |
---|
| 94 | { |
---|
| 95 | |
---|
| 96 | int RegValue; |
---|
| 97 | |
---|
| 98 | //Wait until the DMA transfer is done by checking the Status register |
---|
| 99 | do {RegValue = XDmaCentral_GetStatus((XDmaCentral *)DMA_CENTRAL_INST);} |
---|
| 100 | while ((RegValue & XDMC_DMASR_BUSY_MASK) == XDMC_DMASR_BUSY_MASK); |
---|
| 101 | |
---|
| 102 | return; |
---|
| 103 | } |
---|
[1743] | 104 | #endif |
---|
[1740] | 105 | |
---|
| 106 | /* |
---|
| 107 | * Receive frame |
---|
| 108 | */ |
---|
| 109 | int xilnet_eth_recv_frame(unsigned char *buf, int len) { |
---|
| 110 | |
---|
| 111 | struct xilnet_eth_hdr *eth; |
---|
| 112 | //unsigned short RxPktLength; |
---|
| 113 | int size = -1; |
---|
| 114 | void* pktBufPtr; |
---|
| 115 | |
---|
| 116 | pktBufPtr = buf; |
---|
| 117 | |
---|
| 118 | //device specific routine for getting a frame |
---|
| 119 | |
---|
[1743] | 120 | #ifdef _CONFIG_EMACLITE_ |
---|
| 121 | size = XEmacLite_RecvFrame(MYMAC_BASEADDR, buf); |
---|
| 122 | #else |
---|
| 123 | #ifdef _CONFIG_TEMAC_ |
---|
[1740] | 124 | if(XLlFifo_IsRxEmpty((XLlFifo *)FIFO_INST)) |
---|
| 125 | { |
---|
| 126 | size=-1; |
---|
| 127 | } |
---|
| 128 | else |
---|
| 129 | { |
---|
| 130 | if(XLlFifo_RxOccupancy((XLlFifo *)FIFO_INST)) |
---|
| 131 | { |
---|
| 132 | waitForDMA(); |
---|
| 133 | //Set DMA to non-increment source, increment dest addresses |
---|
| 134 | XDmaCentral_SetControl((XDmaCentral *)DMA_CENTRAL_INST, XDMC_DMACR_DEST_INCR_MASK); |
---|
| 135 | size = XLlFifo_RxGetLen((XLlFifo *)FIFO_INST); |
---|
| 136 | XDmaCentral_Transfer((XDmaCentral *)DMA_CENTRAL_INST, |
---|
| 137 | (u8 *)(((XLlFifo *)FIFO_INST)->BaseAddress+XLLF_RDFD_OFFSET), |
---|
| 138 | (u8 *)pktBufPtr, |
---|
| 139 | size); |
---|
| 140 | } |
---|
| 141 | } |
---|
[1743] | 142 | #endif |
---|
| 143 | #endif |
---|
[1740] | 144 | |
---|
| 145 | #ifdef _DEBUG_ |
---|
| 146 | xil_printf("Ethernet Recvd Frame of size %d...\r\n", size); |
---|
| 147 | xil_printf("src : %d%d%d%d%d%d...\r\n", buf[0], buf[1],buf[2],buf[3],buf[4],buf[5]); |
---|
| 148 | xil_printf("dst : %d%d%d%d%d%d...\r\n", buf[6], buf[7],buf[8],buf[9],buf[10],buf[11]); |
---|
| 149 | xil_printf("type : %d%d...\r\n", buf[12], buf[13]); |
---|
| 150 | #endif |
---|
| 151 | |
---|
| 152 | //} |
---|
| 153 | |
---|
| 154 | |
---|
| 155 | // Strip off the FCS(or CRC) from the received frame |
---|
| 156 | //buf[size-1] = 0; |
---|
| 157 | //buf[size-2] = 0; |
---|
| 158 | //buf[size-3] = 0; |
---|
| 159 | //buf[size-4] = 0; |
---|
| 160 | size -= 4; |
---|
| 161 | |
---|
| 162 | |
---|
| 163 | if(size>0){ |
---|
| 164 | eth = (struct xilnet_eth_hdr*) buf; |
---|
| 165 | |
---|
| 166 | switch (eth->type) { |
---|
| 167 | case ETH_PROTO_IP: |
---|
| 168 | return (xilnet_ip(buf, size)); |
---|
| 169 | case ETH_PROTO_ARP: |
---|
| 170 | return (xilnet_arp(buf, size)); |
---|
| 171 | default: |
---|
| 172 | #ifdef _DEBUG_ |
---|
| 173 | xil_printf("Unknown protocol %x...\r\n", eth->type); |
---|
| 174 | #endif |
---|
| 175 | break; |
---|
| 176 | } |
---|
| 177 | } |
---|
| 178 | return -1; |
---|
| 179 | } |
---|
| 180 | |
---|
| 181 | |
---|
| 182 | /* |
---|
| 183 | * Send frame to peer ip addr, peer hw addr |
---|
| 184 | */ |
---|
| 185 | |
---|
| 186 | |
---|
| 187 | int xilnet_eth_send_frame(unsigned char *pkt, int len, unsigned char *dip_addr, |
---|
| 188 | void *dhw_addr, unsigned short type) |
---|
| 189 | { |
---|
| 190 | int i; |
---|
| 191 | int hw_tbl_index = 0; |
---|
| 192 | |
---|
| 193 | for (i = 0; i < ETH_ADDR_LEN; i++) { |
---|
| 194 | ((struct xilnet_eth_hdr*)pkt)->src_addr[i] = mb_hw_addr[i]; |
---|
| 195 | } |
---|
| 196 | |
---|
| 197 | if (dhw_addr) |
---|
| 198 | memcpy(((struct xilnet_eth_hdr*)pkt)->dest_addr, dhw_addr, ETH_ADDR_LEN); |
---|
| 199 | else { |
---|
| 200 | // find the hw tbl entry index corr to dip_addr |
---|
| 201 | hw_tbl_index = xilnet_eth_get_hw_addr(dip_addr); |
---|
| 202 | |
---|
| 203 | for (i = 0; i < ETH_ADDR_LEN; i++) { |
---|
| 204 | ((struct xilnet_eth_hdr*)pkt)->dest_addr[i] = xilnet_hw_tbl[hw_tbl_index].hw_addr[i]; |
---|
| 205 | } |
---|
| 206 | } |
---|
| 207 | ((struct xilnet_eth_hdr*)pkt)->type = type; |
---|
| 208 | |
---|
| 209 | // pad the ethernet frame if < 60 bytes |
---|
| 210 | if (len < 60) { |
---|
| 211 | for(i = len; i < ETH_MIN_FRAME_LEN; i++) { |
---|
| 212 | pkt[i] = 0; |
---|
| 213 | } |
---|
| 214 | len = ETH_MIN_FRAME_LEN; |
---|
| 215 | } |
---|
| 216 | // Write to MAC |
---|
[1743] | 217 | #ifdef _CONFIG_EMACLITE_ |
---|
| 218 | XEmacLite_SendFrame(MYMAC_BASEADDR, pkt, len); |
---|
| 219 | #else |
---|
| 220 | #ifdef _CONFIG_TEMAC_ |
---|
| 221 | waitForDMA(); |
---|
[1740] | 222 | //Set DMA to increment src, non-increment dest addresses |
---|
| 223 | XDmaCentral_SetControl((XDmaCentral *)DMA_CENTRAL_INST, XDMC_DMACR_SOURCE_INCR_MASK); |
---|
| 224 | //Transfer the packet into the LLFIFO |
---|
| 225 | XDmaCentral_Transfer((XDmaCentral *)DMA_CENTRAL_INST, |
---|
| 226 | (u8 *)(pkt), |
---|
| 227 | (u8 *)(((XLlFifo *)FIFO_INST)->BaseAddress + XLLF_TDFD_OFFSET), |
---|
| 228 | len); |
---|
| 229 | waitForDMA(); |
---|
| 230 | //Write the length to the LL_FIFO; this write initiates the TEMAC transmission |
---|
| 231 | // XIo_Out32( (FIFO_BASEADDR + XLLF_TLF_OFFSET), len); |
---|
| 232 | XLlFifo_TxSetLen((XLlFifo *)FIFO_INST, len); |
---|
| 233 | |
---|
| 234 | //xil_printf("xilnet_eth_send_frame(), len = %d \r\n",len); |
---|
[1743] | 235 | #endif |
---|
| 236 | #endif |
---|
| 237 | |
---|
| 238 | |
---|
[1740] | 239 | return len; |
---|
| 240 | } |
---|
| 241 | |
---|
| 242 | |
---|
| 243 | /* |
---|
| 244 | * Update Hardware Address Table |
---|
| 245 | */ |
---|
| 246 | |
---|
| 247 | void xilnet_eth_update_hw_tbl(unsigned char *buf, int proto) { |
---|
| 248 | |
---|
| 249 | unsigned char ip[IP_VERSION]; |
---|
| 250 | unsigned char hw[ETH_ADDR_LEN]; |
---|
| 251 | int i, j; |
---|
| 252 | //struct xilnet_eth_hdr *eth = (struct xilnet_eth_hdr*) buf; |
---|
| 253 | |
---|
| 254 | // Update the current age |
---|
| 255 | curr_age++; |
---|
| 256 | |
---|
| 257 | // get hw addr |
---|
| 258 | for (i = 0; i < ETH_ADDR_LEN; i++) { |
---|
| 259 | hw[i] = ((struct xilnet_eth_hdr*)buf)->src_addr[i]; |
---|
| 260 | } |
---|
| 261 | |
---|
| 262 | // get ip addr |
---|
| 263 | switch (proto) { |
---|
| 264 | case ETH_PROTO_ARP: |
---|
| 265 | for (i = 0; i < IP_VERSION; i++) { |
---|
| 266 | ip[i] = (buf+ETH_HDR_LEN)[ARP_SIP_OFFSET+i]; |
---|
| 267 | } |
---|
| 268 | break; |
---|
| 269 | case ETH_PROTO_IP: |
---|
| 270 | for (i = 0; i < IP_VERSION; i++) { |
---|
| 271 | ip[i] = (buf+ETH_HDR_LEN)[IP_SADDR_BASE+i]; |
---|
| 272 | } |
---|
| 273 | break; |
---|
| 274 | } |
---|
| 275 | |
---|
| 276 | // update the hw addr table |
---|
| 277 | |
---|
| 278 | for (i = 0; i < HW_ADDR_TBL_ENTRIES; i++) { |
---|
| 279 | if (xilnet_hw_tbl[i].flag) { |
---|
| 280 | if ( (hw[0] == xilnet_hw_tbl[i].hw_addr[0]) && |
---|
| 281 | (hw[1] == xilnet_hw_tbl[i].hw_addr[1]) && |
---|
| 282 | (hw[2] == xilnet_hw_tbl[i].hw_addr[2]) && |
---|
| 283 | (hw[3] == xilnet_hw_tbl[i].hw_addr[3]) && |
---|
| 284 | (hw[4] == xilnet_hw_tbl[i].hw_addr[4]) && |
---|
| 285 | (hw[5] == xilnet_hw_tbl[i].hw_addr[5]) |
---|
| 286 | ) { |
---|
| 287 | for (j = 0; j < IP_VERSION; j++) |
---|
| 288 | xilnet_hw_tbl[i].ip_addr[j] = ip[j];; |
---|
| 289 | xilnet_hw_tbl[i].flag = HW_ADDR_ENTRY_IS_TRUE; |
---|
| 290 | xilnet_hw_tbl[i].age = curr_age; |
---|
| 291 | return; |
---|
| 292 | } |
---|
| 293 | } |
---|
| 294 | } |
---|
| 295 | xilnet_add_hw_tbl_entry(ip, hw); |
---|
| 296 | } |
---|
| 297 | |
---|
| 298 | |
---|
| 299 | /* |
---|
| 300 | * Add an entry into Hw Addr table |
---|
| 301 | */ |
---|
| 302 | |
---|
| 303 | void xilnet_add_hw_tbl_entry(unsigned char *ip, unsigned char *hw) |
---|
| 304 | { |
---|
| 305 | int i, j; |
---|
| 306 | |
---|
| 307 | for (i = 0; i < HW_ADDR_TBL_ENTRIES; i++) { |
---|
| 308 | if (!xilnet_hw_tbl[i].flag) { |
---|
| 309 | for (j = 0; j < ETH_ADDR_LEN; j++) { |
---|
| 310 | xilnet_hw_tbl[i].hw_addr[j] = hw[j]; |
---|
| 311 | } |
---|
| 312 | for (j = 0; j < IP_VERSION; j++) { |
---|
| 313 | xilnet_hw_tbl[i].ip_addr[j] = ip[j]; |
---|
| 314 | } |
---|
| 315 | xilnet_hw_tbl[i].flag = HW_ADDR_ENTRY_IS_TRUE; |
---|
| 316 | xilnet_hw_tbl[i].age = curr_age; |
---|
| 317 | return; |
---|
| 318 | } |
---|
| 319 | } |
---|
| 320 | |
---|
| 321 | // Find an old entry to be eliminated from hw tbl |
---|
| 322 | i = xilnet_eth_find_old_entry(); |
---|
| 323 | for (j = 0; j < ETH_ADDR_LEN; j++) { |
---|
| 324 | xilnet_hw_tbl[i].hw_addr[j] = hw[j]; |
---|
| 325 | } |
---|
| 326 | for (j = 0; j < IP_VERSION; j++) { |
---|
| 327 | xilnet_hw_tbl[i].ip_addr[j] = ip[j]; |
---|
| 328 | } |
---|
| 329 | xilnet_hw_tbl[i].flag = HW_ADDR_ENTRY_IS_TRUE; |
---|
| 330 | xilnet_hw_tbl[i].age = curr_age; |
---|
| 331 | |
---|
| 332 | } |
---|
| 333 | |
---|
| 334 | |
---|
| 335 | /* |
---|
| 336 | * Get index into hw tbl for ip_addr |
---|
| 337 | */ |
---|
| 338 | |
---|
| 339 | int xilnet_eth_get_hw_addr(unsigned char *ip) { |
---|
| 340 | |
---|
| 341 | int i; |
---|
| 342 | |
---|
| 343 | for (i = 0; i < HW_ADDR_TBL_ENTRIES; i++) { |
---|
| 344 | if (xilnet_hw_tbl[i].flag) |
---|
| 345 | if ( (ip[0] == xilnet_hw_tbl[i].ip_addr[0]) && |
---|
| 346 | (ip[1] == xilnet_hw_tbl[i].ip_addr[1]) && |
---|
| 347 | (ip[2] == xilnet_hw_tbl[i].ip_addr[2]) && |
---|
| 348 | (ip[3] == xilnet_hw_tbl[i].ip_addr[3]) ) { |
---|
| 349 | return i; |
---|
| 350 | } |
---|
| 351 | } |
---|
| 352 | |
---|
| 353 | xil_printf("Hw Addr Not found for IP \r\n"); |
---|
| 354 | return -1; |
---|
| 355 | |
---|
| 356 | } |
---|
| 357 | |
---|
| 358 | |
---|
| 359 | /* |
---|
| 360 | * Init the hw addr table |
---|
| 361 | */ |
---|
| 362 | |
---|
| 363 | void xilnet_eth_init_hw_addr_tbl() { |
---|
| 364 | |
---|
| 365 | int i; |
---|
| 366 | |
---|
| 367 | for (i = 0; i < HW_ADDR_TBL_ENTRIES; i++) { |
---|
| 368 | xilnet_hw_tbl[i].flag = HW_ADDR_ENTRY_IS_FALSE; |
---|
| 369 | xilnet_hw_tbl[i].age = 0; |
---|
| 370 | } |
---|
| 371 | |
---|
| 372 | ishwaddrinit = 1; |
---|
| 373 | } |
---|
| 374 | |
---|
| 375 | /* |
---|
| 376 | * Find the oldest entry in the Hw Table and |
---|
| 377 | * return its index |
---|
| 378 | */ |
---|
| 379 | |
---|
| 380 | int xilnet_eth_find_old_entry() |
---|
| 381 | { |
---|
| 382 | int i; |
---|
| 383 | int oldest_age = 0; |
---|
| 384 | int oldest = 0; |
---|
| 385 | |
---|
| 386 | for (i = 0; i < HW_ADDR_TBL_ENTRIES; i++) { |
---|
| 387 | |
---|
| 388 | if (curr_age - xilnet_hw_tbl[i].age > HW_ADDR_TBL_MAXAGE) { |
---|
| 389 | oldest = i; |
---|
| 390 | break; |
---|
| 391 | } |
---|
| 392 | else { |
---|
| 393 | if (( curr_age - xilnet_hw_tbl[i].age) > oldest_age) { |
---|
| 394 | oldest_age = curr_age - xilnet_hw_tbl[i].age; |
---|
| 395 | oldest = i; |
---|
| 396 | } |
---|
| 397 | } |
---|
| 398 | } |
---|
| 399 | |
---|
| 400 | return oldest; |
---|
| 401 | |
---|
| 402 | } |
---|