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[/] [openrisc/] [trunk/] [or1ksim/] [peripheral/] [eth.c] - Rev 436
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/* ethernet.c -- Simulation of Ethernet MAC Copyright (C) 2001 by Erez Volk, erez@opencores.org Ivan Guzvinec, ivang@opencores.org Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ /* Autoconf and/or portability configuration */ #include "config.h" #include "port.h" /* System includes */ #include <stdlib.h> #include <stdio.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <sys/types.h> #include <fcntl.h> #include <sys/poll.h> #include <unistd.h> #include <errno.h> #include <linux/if.h> #include <linux/if_tun.h> /* Package includes */ #include "arch.h" #include "config.h" #include "abstract.h" #include "eth.h" #include "dma.h" #include "sim-config.h" #include "fields.h" #include "crc32.h" #include "vapi.h" #include "pic.h" #include "sched.h" #include "toplevel-support.h" #include "sim-cmd.h" struct eth_device { /* Is peripheral enabled */ int enabled; /* Base address in memory */ oraddr_t baseaddr; /* Which DMA controller is this MAC connected to */ unsigned dma; unsigned tx_channel; unsigned rx_channel; /* Our address */ unsigned char mac_address[ETHER_ADDR_LEN]; /* interrupt line */ unsigned long mac_int; /* VAPI ID */ unsigned long base_vapi_id; /* Ethernet PHY address */ unsigned long phy_addr; /* What sort of external I/F: FILE or TAP */ int rtx_type; /* RX and TX file names and handles for FILE type connection. */ char *rxfile, *txfile; int txfd; int rxfd; off_t loopback_offset; /* Info for TAP type connections */ int rtx_fd; char *tap_dev; /* Current TX state */ struct { unsigned long state; unsigned long bd_index; unsigned long bd; unsigned long bd_addr; unsigned working, waiting_for_dma, error; long packet_length; unsigned minimum_length, maximum_length; unsigned add_crc; unsigned crc_dly; unsigned long crc_value; long bytes_left, bytes_sent; } tx; /* Current RX state */ struct { unsigned long state; unsigned long bd_index; unsigned long bd; unsigned long bd_addr; int fd; off_t *offset; unsigned working, error, waiting_for_dma; long packet_length, bytes_read, bytes_left; } rx; /* Visible registers */ struct { unsigned long moder; unsigned long int_source; unsigned long int_mask; unsigned long ipgt; unsigned long ipgr1; unsigned long ipgr2; unsigned long packetlen; unsigned long collconf; unsigned long tx_bd_num; unsigned long controlmoder; unsigned long miimoder; unsigned long miicommand; unsigned long miiaddress; unsigned long miitx_data; unsigned long miirx_data; unsigned long miistatus; unsigned long hash0; unsigned long hash1; /* Buffer descriptors */ unsigned long bd_ram[ETH_BD_SPACE / 4]; } regs; unsigned char rx_buff[ETH_MAXPL]; unsigned char tx_buff[ETH_MAXPL]; unsigned char lo_buff[ETH_MAXPL]; }; /* simulator interface */ static void eth_vapi_read (unsigned long id, unsigned long data, void *dat); /* register interface */ static void eth_write32 (oraddr_t addr, uint32_t value, void *dat); static uint32_t eth_read32 (oraddr_t addr, void *dat); /* clock */ static void eth_controller_tx_clock (void *); static void eth_controller_rx_clock (void *); /* utility functions */ static ssize_t eth_read_rx_file (struct eth_device *, void *, size_t); static void eth_skip_rx_file (struct eth_device *, off_t); static void eth_rx_next_packet (struct eth_device *); static void eth_write_tx_bd_num (struct eth_device *, unsigned long value); static void eth_miim_trans (void *dat); /* ========================================================================== */ /* Dummy socket routines. These are the points where we spoof an Ethernet */ /* network. */ /* -------------------------------------------------------------------------- */ /* ========================================================================= */ /* TX LOGIC */ /*---------------------------------------------------------------------------*/ /* * TX clock * Responsible for starting and finishing TX */ static void eth_controller_tx_clock (void *dat) { struct eth_device *eth = dat; int bAdvance = 1; long nwritten = 0; unsigned long read_word; switch (eth->tx.state) { case ETH_TXSTATE_IDLE: eth->tx.state = ETH_TXSTATE_WAIT4BD; break; case ETH_TXSTATE_WAIT4BD: /* Read buffer descriptor */ eth->tx.bd = eth->regs.bd_ram[eth->tx.bd_index]; eth->tx.bd_addr = eth->regs.bd_ram[eth->tx.bd_index + 1]; if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, READY)) { /*****************/ /* initialize TX */ eth->tx.bytes_left = eth->tx.packet_length = GET_FIELD (eth->tx.bd, ETH_TX_BD, LENGTH); eth->tx.bytes_sent = 0; /* Initialize error status bits */ CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, DEFER); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, COLLISION); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, RETRANSMIT); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, UNDERRUN); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, NO_CARRIER); SET_FIELD (eth->tx.bd, ETH_TX_BD, RETRY, 0); /* Find out minimum length */ if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, PAD) || TEST_FLAG (eth->regs.moder, ETH_MODER, PAD)) eth->tx.minimum_length = GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MINFL); else eth->tx.minimum_length = eth->tx.packet_length; /* Find out maximum length */ if (TEST_FLAG (eth->regs.moder, ETH_MODER, HUGEN)) eth->tx.maximum_length = eth->tx.packet_length; else eth->tx.maximum_length = GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MAXFL); /* Do we need CRC on this packet? */ if (TEST_FLAG (eth->regs.moder, ETH_MODER, CRCEN) || (TEST_FLAG (eth->tx.bd, ETH_TX_BD, CRC) && TEST_FLAG (eth->tx.bd, ETH_TX_BD, LAST))) eth->tx.add_crc = 1; else eth->tx.add_crc = 0; if (TEST_FLAG (eth->regs.moder, ETH_MODER, DLYCRCEN)) eth->tx.crc_dly = 1; else eth->tx.crc_dly = 0; /* XXX - For now we skip CRC calculation */ if (eth->rtx_type == ETH_RTX_FILE) { /* write packet length to file */ nwritten = write (eth->txfd, &(eth->tx.packet_length), sizeof (eth->tx.packet_length)); } /************************************************/ /* start transmit with reading packet into FIFO */ eth->tx.state = ETH_TXSTATE_READFIFO; } /* stay in this state if (TXEN && !READY) */ break; case ETH_TXSTATE_READFIFO: //if (eth->tx.bytes_sent < eth->tx.packet_length) while (eth->tx.bytes_sent < eth->tx.packet_length) { read_word = eval_direct32 (eth->tx.bytes_sent + eth->tx.bd_addr, 0, 0); eth->tx_buff[eth->tx.bytes_sent] = (unsigned char) (read_word >> 24); eth->tx_buff[eth->tx.bytes_sent + 1] = (unsigned char) (read_word >> 16); eth->tx_buff[eth->tx.bytes_sent + 2] = (unsigned char) (read_word >> 8); eth->tx_buff[eth->tx.bytes_sent + 3] = (unsigned char) (read_word); eth->tx.bytes_sent += 4; } //else // { eth->tx.state = ETH_TXSTATE_TRANSMIT; // } break; case ETH_TXSTATE_TRANSMIT: /* send packet */ switch (eth->rtx_type) { case ETH_RTX_FILE: nwritten = write (eth->txfd, eth->tx_buff, eth->tx.packet_length); break; case ETH_RTX_TAP: /* printf ("Writing TAP\n"); printf("packet %d bytes:",(int) eth->tx.packet_length ); int j; for (j=0;j<eth->tx.packet_length;j++) { if (j%16==0)printf("\n"); else if (j%8==0) printf(" "); printf("%.2x ", eth->tx_buff[j]); } printf("\nend packet:\n"); */ nwritten = write (eth->rtx_fd, eth->tx_buff, eth->tx.packet_length); break; } /* set BD status */ if (nwritten == eth->tx.packet_length) { CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, READY); SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, TXB); eth->tx.state = ETH_TXSTATE_WAIT4BD; } else { /* XXX - implement retry mechanism here! */ CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, READY); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, COLLISION); SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, TXE); eth->tx.state = ETH_TXSTATE_WAIT4BD; } eth->regs.bd_ram[eth->tx.bd_index] = eth->tx.bd; /* generate OK interrupt */ if (TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, TXE_M) || TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, TXB_M)) { if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, IRQ)) { //printf ("ETH_TXSTATE_TRANSMIT interrupt\n"); report_interrupt (eth->mac_int); } } /* advance to next BD */ if (bAdvance) { if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, WRAP) || eth->tx.bd_index >= ETH_BD_COUNT) eth->tx.bd_index = 0; else eth->tx.bd_index += 2; } break; } /* Reschedule */ SCHED_ADD (eth_controller_tx_clock, dat, 1); } /* ========================================================================= */ /* ========================================================================= */ /* RX LOGIC */ /*---------------------------------------------------------------------------*/ /* * RX clock * Responsible for starting and finishing RX */ static void eth_controller_rx_clock (void *dat) { struct eth_device *eth = dat; long nread = 0; unsigned long send_word; struct pollfd fds[1]; int n; switch (eth->rx.state) { case ETH_RXSTATE_IDLE: eth->rx.state = ETH_RXSTATE_WAIT4BD; break; case ETH_RXSTATE_WAIT4BD: eth->rx.bd = eth->regs.bd_ram[eth->rx.bd_index]; eth->rx.bd_addr = eth->regs.bd_ram[eth->rx.bd_index + 1]; if (TEST_FLAG (eth->rx.bd, ETH_RX_BD, READY)) { /*****************/ /* Initialize RX */ CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, MISS); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, INVALID); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, DRIBBLE); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, UVERRUN); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, COLLISION); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, TOOBIG); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, TOOSHORT); /* Setup file to read from */ if (TEST_FLAG (eth->regs.moder, ETH_MODER, LOOPBCK)) { eth->rx.fd = eth->txfd; eth->rx.offset = &(eth->loopback_offset); } else { eth->rx.fd = eth->rxfd; eth->rx.offset = 0; } eth->rx.state = ETH_RXSTATE_RECV; //printf("rx_clk: going to ETH_RXSTATE_RECV\n"); } else if (!TEST_FLAG (eth->regs.moder, ETH_MODER, RXEN)) { eth->rx.state = ETH_RXSTATE_IDLE; } else { /* Poll to see if there is data to read */ struct pollfd fds[1]; int n; fds[0].fd = eth->rtx_fd; fds[0].events = POLLIN; n = poll (fds, 1, 0); if (n < 0) { fprintf (stderr, "Warning: Poll of WAIT4BD failed %s: ignored.\n", strerror (errno)); } else if ((n > 0) && ((fds[0].revents & POLLIN) == POLLIN)) { printf ("Reading TAP and all BDs full = BUSY\n"); nread = read (eth->rtx_fd, eth->rx_buff, ETH_MAXPL); if (nread < 0) { fprintf (stderr, "Warning: Read of WAIT4BD failed %s: ignored\n", strerror (errno)); } else if (nread > 0) { SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, BUSY); if (TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, BUSY_M)) { printf ("ETH_RXSTATE_WAIT4BD BUSY interrupt\n"); report_interrupt (eth->mac_int); } } } } break; case ETH_RXSTATE_RECV: switch (eth->rtx_type) { case ETH_RTX_FILE: /* Read packet length */ if (eth_read_rx_file (eth, &(eth->rx.packet_length), sizeof (eth->rx.packet_length)) < sizeof (eth->rx.packet_length)) { /* TODO: just do what real ethernet would do (some kind of error state) */ sim_done (); break; } /* Packet must be big enough to hold a header */ if (eth->rx.packet_length < ETHER_HDR_LEN) { eth_rx_next_packet (eth); eth->rx.state = ETH_RXSTATE_WAIT4BD; break; } eth->rx.bytes_read = 0; eth->rx.bytes_left = eth->rx.packet_length; /* for now Read entire packet into memory */ nread = eth_read_rx_file (eth, eth->rx_buff, eth->rx.bytes_left); if (nread < eth->rx.bytes_left) { eth->rx.error = 1; break; } eth->rx.packet_length = nread; eth->rx.bytes_left = nread; eth->rx.bytes_read = 0; eth->rx.state = ETH_RXSTATE_WRITEFIFO; break; case ETH_RTX_TAP: /* Poll to see if there is data to read */ fds[0].fd = eth->rtx_fd; fds[0].events = POLLIN; n = poll (fds, 1, 0); if (n < 0) { fprintf (stderr, "Warning: Poll of RXTATE_RECV failed %s: ignored.\n", strerror (errno)); } else if ((n > 0) && ((fds[0].revents & POLLIN) == POLLIN)) { //printf ("Reading TAP. "); nread = read (eth->rtx_fd, eth->rx_buff, ETH_MAXPL); //printf ("%d bytes read.\n",(int) nread); if (nread < 0) { fprintf (stderr, "Warning: Read of RXTATE_RECV failed %s: ignored\n", strerror (errno)); if (TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, RXE_M)) { SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, RXE); printf ("ETH_RXTATE_RECV RXE interrupt\n"); report_interrupt (eth->mac_int); } } } /* If not promiscouos mode, check the destination address */ if (!TEST_FLAG (eth->regs.moder, ETH_MODER, PRO) && nread) { if (TEST_FLAG (eth->regs.moder, ETH_MODER, IAM) && (eth->rx_buff[0] & 1)) { /* Nothing for now */ } if (((eth->mac_address[5] != eth->rx_buff[0]) && (eth->rx_buff[5] != 0xff) ) || ((eth->mac_address[4] != eth->rx_buff[1]) && (eth->rx_buff[4] != 0xff) ) || ((eth->mac_address[3] != eth->rx_buff[2]) && (eth->rx_buff[3] != 0xff) ) || ((eth->mac_address[2] != eth->rx_buff[3]) && (eth->rx_buff[2] != 0xff) ) || ((eth->mac_address[1] != eth->rx_buff[4]) && (eth->rx_buff[1] != 0xff) ) || ((eth->mac_address[0] != eth->rx_buff[5]) && (eth->rx_buff[0] != 0xff))) { /* printf("ETH_RXSTATE dropping packet for %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n", eth->rx_buff[0], eth->rx_buff[1], eth->rx_buff[2], eth->rx_buff[3], eth->rx_buff[4], eth->rx_buff[5]); */ break; } } eth->rx.packet_length = nread; eth->rx.bytes_left = nread; eth->rx.bytes_read = 0; if (nread) eth->rx.state = ETH_RXSTATE_WRITEFIFO; break; case ETH_RTX_VAPI: break; } break; case ETH_RXSTATE_WRITEFIFO: //printf("ETH_RXSTATE_WRITEFIFO: writing to %d bytes 0x%.8x\n",(int)eth->rx.bytes_left, (unsigned int)eth->rx.bd_addr); if (eth->rx.bytes_left > 0){ while((int) eth->rx.bytes_left){ send_word = ((unsigned long) eth->rx_buff[eth->rx.bytes_read] << 24) | ((unsigned long) eth->rx_buff[eth->rx.bytes_read + 1] << 16) | ((unsigned long) eth->rx_buff[eth->rx.bytes_read + 2] << 8) | ((unsigned long) eth->rx_buff[eth->rx.bytes_read + 3]); set_direct32 (eth->rx.bd_addr + eth->rx.bytes_read, send_word, 0, 0); /* update counters */ if (eth->rx.bytes_left >= 4) { eth->rx.bytes_left -= 4; eth->rx.bytes_read += 4; } else { eth->rx.bytes_read += eth->rx.bytes_left; eth->rx.bytes_left = 0; } } } //printf("ETH_RXSTATE_WRITEFIFO: bytes read: 0x%.8x\n",(unsigned int)eth->rx.bytes_read); if (eth->rx.bytes_left <= 0) { /* Write result to bd */ SET_FIELD (eth->rx.bd, ETH_RX_BD, LENGTH, eth->rx.packet_length+4); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, READY); SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, RXB); /* if (eth->rx.packet_length < (GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MINFL) - 4)) SET_FLAG (eth->rx.bd, ETH_RX_BD, TOOSHORT); if (eth->rx.packet_length > GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MAXFL)) SET_FLAG (eth->rx.bd, ETH_RX_BD, TOOBIG); */ eth->regs.bd_ram[eth->rx.bd_index] = eth->rx.bd; /* advance to next BD */ if (TEST_FLAG (eth->rx.bd, ETH_RX_BD, WRAP) || eth->rx.bd_index >= ETH_BD_COUNT) eth->rx.bd_index = eth->regs.tx_bd_num << 1; else eth->rx.bd_index += 2; if ((TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, RXB_M)) && (TEST_FLAG (eth->rx.bd, ETH_RX_BD, IRQ))) { //printf ("ETH_RXSTATE_WRITEFIFO interrupt\n"); report_interrupt (eth->mac_int); } /* ready to receive next packet */ eth->rx.state = ETH_RXSTATE_IDLE; } break; } /* Reschedule */ SCHED_ADD (eth_controller_rx_clock, dat, 1); } /* ========================================================================= */ /* Move to next RX BD */ static void eth_rx_next_packet (struct eth_device *eth) { /* Skip any possible leftovers */ if (eth->rx.bytes_left) eth_skip_rx_file (eth, eth->rx.bytes_left); } /* "Skip" bytes in RX file */ static void eth_skip_rx_file (struct eth_device *eth, off_t count) { eth->rx.offset += count; } /* * Utility function to read from the ethernet RX file * This function moves the file pointer to the current place in the packet before reading */ static ssize_t eth_read_rx_file (struct eth_device *eth, void *buf, size_t count) { ssize_t result; if (eth->rx.fd <= 0) { return 0; } if (eth->rx.offset) if (lseek (eth->rx.fd, *(eth->rx.offset), SEEK_SET) == (off_t) - 1) { return 0; } result = read (eth->rx.fd, buf, count); if (eth->rx.offset && result >= 0) *(eth->rx.offset) += result; return result; } /* ========================================================================= */ /* -------------------------------------------------------------------------- */ /*!Reset the Ethernet. Open the correct type of simulation interface to the outside world. Initialize all registers to default and places devices in memory address space. @param[in] dat The Ethernet interface data structure. */ /* -------------------------------------------------------------------------- */ static void eth_reset (void *dat) { struct eth_device *eth = dat; struct ifreq ifr; printf ("Resetting Ethernet\n"); /* Nothing to do if we do not have a base address set. TODO: Surely this should test for being enabled? */ if (0 == eth->baseaddr) { return; } switch (eth->rtx_type) { case ETH_RTX_FILE: /* (Re-)open TX/RX files */ if (eth->rxfd >= 0) { close (eth->rxfd); } if (eth->txfd >= 0) { close (eth->txfd); } eth->rxfd = -1; eth->txfd = -1; eth->rxfd = open (eth->rxfile, O_RDONLY); if (eth->rxfd < 0) { fprintf (stderr, "Warning: Cannot open Ethernet RX file \"%s\": %s\n", eth->rxfile, strerror (errno)); } eth->txfd = open (eth->txfile, #if defined(O_SYNC) /* BSD/MacOS X doesn't know about O_SYNC */ O_SYNC | #endif O_RDWR | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); if (eth->txfd < 0) { fprintf (stderr, "Warning: Cannot open Ethernet TX file \"%s\": %s\n", eth->txfile, strerror (errno)); } eth->loopback_offset = lseek (eth->txfd, 0, SEEK_END); break; case ETH_RTX_TAP: /* (Re-)open TAP interface if necessary */ if (eth->rtx_fd != 0) { break; } /* Open the TUN/TAP device */ eth->rtx_fd = open ("/dev/net/tun", O_RDWR); if( eth->rtx_fd < 0 ) { fprintf (stderr, "Warning: Failed to open TUN/TAP device: %s\n", strerror (errno)); eth->rtx_fd = 0; return; } /* Turn it into a specific TAP device. If we haven't specified a specific (persistent) device, one will be created, but that requires superuser, or at least CAP_NET_ADMIN capabilities. */ memset (&ifr, 0, sizeof(ifr)); ifr.ifr_flags = IFF_TAP | IFF_NO_PI; strncpy (ifr.ifr_name, eth->tap_dev, IFNAMSIZ); if (ioctl (eth->rtx_fd, TUNSETIFF, (void *) &ifr) < 0) { fprintf (stderr, "Warning: Failed to set TAP device: %s\n", strerror (errno)); close (eth->rtx_fd); eth->rtx_fd = 0; return; } PRINTF ("Opened TAP %s\n", ifr.ifr_name); /* Do we need to flush any packets? */ break; } /* Set registers to default values */ memset (&(eth->regs), 0, sizeof (eth->regs)); eth->regs.moder = 0x0000A000; eth->regs.ipgt = 0x00000012; eth->regs.ipgr1 = 0x0000000C; eth->regs.ipgr2 = 0x00000012; eth->regs.packetlen = 0x003C0600; eth->regs.collconf = 0x000F003F; eth->regs.miimoder = 0x00000064; eth->regs.tx_bd_num = 0x00000040; /* Clear TX/RX status and initialize buffer descriptor index. */ memset (&(eth->tx), 0, sizeof (eth->tx)); memset (&(eth->rx), 0, sizeof (eth->rx)); /* Reset TX/RX BD indexes */ eth->tx.bd_index = 0; eth->rx.bd_index = eth->regs.tx_bd_num << 1; /* Initialize VAPI */ if (eth->base_vapi_id) { vapi_install_multi_handler (eth->base_vapi_id, ETH_NUM_VAPI_IDS, eth_vapi_read, dat); } } /* eth_reset () */ /* Print register values on stdout */ static void eth_status (void *dat) { struct eth_device *eth = dat; PRINTF ("\nEthernet MAC at 0x%" PRIxADDR ":\n", eth->baseaddr); PRINTF ("MODER : 0x%08lX\n", eth->regs.moder); PRINTF ("INT_SOURCE : 0x%08lX\n", eth->regs.int_source); PRINTF ("INT_MASK : 0x%08lX\n", eth->regs.int_mask); PRINTF ("IPGT : 0x%08lX\n", eth->regs.ipgt); PRINTF ("IPGR1 : 0x%08lX\n", eth->regs.ipgr1); PRINTF ("IPGR2 : 0x%08lX\n", eth->regs.ipgr2); PRINTF ("PACKETLEN : 0x%08lX\n", eth->regs.packetlen); PRINTF ("COLLCONF : 0x%08lX\n", eth->regs.collconf); PRINTF ("TX_BD_NUM : 0x%08lX\n", eth->regs.tx_bd_num); PRINTF ("CTRLMODER : 0x%08lX\n", eth->regs.controlmoder); PRINTF ("MIIMODER : 0x%08lX\n", eth->regs.miimoder); PRINTF ("MIICOMMAND : 0x%08lX\n", eth->regs.miicommand); PRINTF ("MIIADDRESS : 0x%08lX\n", eth->regs.miiaddress); PRINTF ("MIITX_DATA : 0x%08lX\n", eth->regs.miitx_data); PRINTF ("MIIRX_DATA : 0x%08lX\n", eth->regs.miirx_data); PRINTF ("MIISTATUS : 0x%08lX\n", eth->regs.miistatus); PRINTF ("MAC Address : %02X:%02X:%02X:%02X:%02X:%02X\n", eth->mac_address[0], eth->mac_address[1], eth->mac_address[2], eth->mac_address[3], eth->mac_address[4], eth->mac_address[5]); PRINTF ("HASH0 : 0x%08lX\n", eth->regs.hash0); PRINTF ("HASH1 : 0x%08lX\n", eth->regs.hash1); } /* ========================================================================= */ /* Read a register */ static uint32_t eth_read32 (oraddr_t addr, void *dat) { struct eth_device *eth = dat; switch (addr) { case ETH_MODER: return eth->regs.moder; case ETH_INT_SOURCE: return eth->regs.int_source; case ETH_INT_MASK: return eth->regs.int_mask; case ETH_IPGT: return eth->regs.ipgt; case ETH_IPGR1: return eth->regs.ipgr1; case ETH_IPGR2: return eth->regs.ipgr2; case ETH_PACKETLEN: return eth->regs.packetlen; case ETH_COLLCONF: return eth->regs.collconf; case ETH_TX_BD_NUM: return eth->regs.tx_bd_num; case ETH_CTRLMODER: return eth->regs.controlmoder; case ETH_MIIMODER: return eth->regs.miimoder; case ETH_MIICOMMAND: return eth->regs.miicommand; case ETH_MIIADDRESS: return eth->regs.miiaddress; case ETH_MIITX_DATA: return eth->regs.miitx_data; case ETH_MIIRX_DATA: /*printf("or1ksim: read MIIM RX: 0x%x\n",(int)eth->regs.miirx_data);*/ return eth->regs.miirx_data; case ETH_MIISTATUS: return eth->regs.miistatus; case ETH_MAC_ADDR0: return (((unsigned long) eth->mac_address[3]) << 24) | (((unsigned long) eth->mac_address[2]) << 16) | (((unsigned long) eth->mac_address[1]) << 8) | (unsigned long) eth->mac_address[0]; case ETH_MAC_ADDR1: return (((unsigned long) eth->mac_address[5]) << 8) | (unsigned long) eth->mac_address[4]; case ETH_HASH0: return eth->regs.hash0; case ETH_HASH1: return eth->regs.hash1; /*case ETH_DMA_RX_TX: return eth_rx( eth ); */ } if ((addr >= ETH_BD_BASE) && (addr < ETH_BD_BASE + ETH_BD_SPACE)) return eth->regs.bd_ram[(addr - ETH_BD_BASE) / 4]; PRINTF ("eth_read32( 0x%" PRIxADDR " ): Illegal address\n", addr + eth->baseaddr); return 0; } /* ========================================================================= */ /* Write a register */ static void eth_write32 (oraddr_t addr, uint32_t value, void *dat) { struct eth_device *eth = dat; switch (addr) { case ETH_MODER: if (!TEST_FLAG (eth->regs.moder, ETH_MODER, RXEN) && TEST_FLAG (value, ETH_MODER, RXEN)) { // Reset RX BD index eth->rx.bd_index = eth->regs.tx_bd_num << 1; SCHED_ADD (eth_controller_rx_clock, dat, 1); } else if (!TEST_FLAG (value, ETH_MODER, RXEN)) SCHED_FIND_REMOVE (eth_controller_rx_clock, dat); if (!TEST_FLAG (eth->regs.moder, ETH_MODER, TXEN) && TEST_FLAG (value, ETH_MODER, TXEN)) { eth->tx.bd_index = 0; SCHED_ADD (eth_controller_tx_clock, dat, 1); } else if (!TEST_FLAG (value, ETH_MODER, TXEN)) SCHED_FIND_REMOVE (eth_controller_tx_clock, dat); eth->regs.moder = value; if (TEST_FLAG (value, ETH_MODER, RST)) eth_reset (dat); return; case ETH_INT_SOURCE: // Clear interrupt if all interrupt sources have been dealt with eth->regs.int_source &= ~value; if (!eth->regs.int_source) clear_interrupt (eth->mac_int); return; case ETH_INT_MASK: eth->regs.int_mask = value; if (eth->regs.int_source & eth->regs.int_mask) report_interrupt (eth->mac_int); else clear_interrupt (eth->mac_int); return; case ETH_IPGT: eth->regs.ipgt = value; return; case ETH_IPGR1: eth->regs.ipgr1 = value; return; case ETH_IPGR2: eth->regs.ipgr2 = value; return; case ETH_PACKETLEN: eth->regs.packetlen = value; return; case ETH_COLLCONF: eth->regs.collconf = value; return; case ETH_TX_BD_NUM: eth_write_tx_bd_num (eth, value); return; case ETH_CTRLMODER: eth->regs.controlmoder = value; return; case ETH_MIIMODER: eth->regs.miimoder = value; return; case ETH_MIICOMMAND: eth->regs.miicommand = value; /* Perform MIIM transaction, if required */ eth_miim_trans(dat); return; case ETH_MIIADDRESS: eth->regs.miiaddress = value; return; case ETH_MIITX_DATA: eth->regs.miitx_data = value; return; case ETH_MIIRX_DATA: /* Register is R/O eth->regs.miirx_data = value; */ return; case ETH_MIISTATUS: /* Register is R/O eth->regs.miistatus = value; */ return; case ETH_MAC_ADDR0: eth->mac_address[0] = value & 0xFF; eth->mac_address[1] = (value >> 8) & 0xFF; eth->mac_address[2] = (value >> 16) & 0xFF; eth->mac_address[3] = (value >> 24) & 0xFF; return; case ETH_MAC_ADDR1: eth->mac_address[4] = value & 0xFF; eth->mac_address[5] = (value >> 8) & 0xFF; return; case ETH_HASH0: eth->regs.hash0 = value; return; case ETH_HASH1: eth->regs.hash1 = value; return; /*case ETH_DMA_RX_TX: eth_tx( eth, value ); return; */ } if ((addr >= ETH_BD_BASE) && (addr < ETH_BD_BASE + ETH_BD_SPACE)) { eth->regs.bd_ram[(addr - ETH_BD_BASE) / 4] = value; return; } PRINTF ("eth_write32( 0x%" PRIxADDR " ): Illegal address\n", addr + eth->baseaddr); return; } /* ========================================================================= */ /* * VAPI connection to outside */ static void eth_vapi_read (unsigned long id, unsigned long data, void *dat) { unsigned long which; struct eth_device *eth = dat; which = id - eth->base_vapi_id; if (!eth) { return; } switch (which) { case ETH_VAPI_DATA: break; case ETH_VAPI_CTRL: break; } } /* ========================================================================= */ /* When TX_BD_NUM is written, also reset current RX BD index */ static void eth_write_tx_bd_num (struct eth_device *eth, unsigned long value) { eth->regs.tx_bd_num = value & 0xFF; eth->rx.bd_index = eth->regs.tx_bd_num << 1; } /* ========================================================================= */ /*-----------------------------------------------[ Ethernet configuration ]---*/ /*---------------------------------------------------------------------------*/ /*!Enable or disable the Ethernet interface @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_enabled (union param_val val, void *dat) { struct eth_device *eth = dat; eth->enabled = val.int_val; } /* eth_enabled() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet interface base address @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_baseaddr (union param_val val, void *dat) { struct eth_device *eth = dat; eth->baseaddr = val.addr_val; } /* eth_baseaddr() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA port This is not currently supported, so a warning message is printed. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_dma (union param_val val, void *dat) { struct eth_device *eth = dat; fprintf (stderr, "Warning: External Ethernet DMA not currently supported\n"); eth->dma = val.addr_val; } /* eth_dma() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet IRQ @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_irq (union param_val val, void *dat) { struct eth_device *eth = dat; eth->mac_int = val.int_val; } /* eth_irq() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet interface type Currently two types are supported, file and tap. @param[in] val The value to use. Currently "file" and "tap" are supported. @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_rtx_type (union param_val val, void *dat) { struct eth_device *eth = dat; if (0 == strcasecmp ("file", val.str_val)) { printf ("Ethernet FILE type\n"); eth->rtx_type = ETH_RTX_FILE; } else if (0 == strcasecmp ("tap", val.str_val)) { printf ("Ethernet TAP type\n"); eth->rtx_type = ETH_RTX_TAP; } else { fprintf (stderr, "Warning: Unknown Ethernet type: file assumed.\n"); eth->rtx_type = ETH_RTX_FILE; } } /* eth_rtx_type() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Rx channel External DMA is not currently supported, so a warning message is printed. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_rx_channel (union param_val val, void *dat) { struct eth_device *eth = dat; fprintf (stderr, "Warning: External Ethernet DMA not currently supported: " "Rx channel ignored\n"); eth->rx_channel = val.int_val; } /* eth_rx_channel() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Tx channel External DMA is not currently supported, so a warning message is printed. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_tx_channel (union param_val val, void *dat) { struct eth_device *eth = dat; fprintf (stderr, "Warning: External Ethernet DMA not currently supported: " "Tx channel ignored\n"); eth->tx_channel = val.int_val; } /* eth_tx_channel() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Rx file Free any previously allocated value. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_rxfile (union param_val val, void *dat) { struct eth_device *eth = dat; if (NULL != eth->rxfile) { free (eth->rxfile); eth->rxfile = NULL; } if (!(eth->rxfile = strdup (val.str_val))) { fprintf (stderr, "Peripheral Ethernet: Run out of memory\n"); exit (-1); } } /* eth_rxfile() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Tx file Free any previously allocated value. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_txfile (union param_val val, void *dat) { struct eth_device *eth = dat; if (NULL != eth->txfile) { free (eth->txfile); eth->txfile = NULL; } if (!(eth->txfile = strdup (val.str_val))) { fprintf (stderr, "Peripheral Ethernet: Run out of memory\n"); exit (-1); } } /* eth_txfile() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet TAP device. If we are not superuser (or do not have CAP_NET_ADMIN priviledges), then we must work with a persistent TAP device that is already set up. This option specifies the device to user. @param[in] val The value to use. @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_tap_dev (union param_val val, void *dat) { struct eth_device *eth = dat; if (NULL != eth->tap_dev) { free (eth->tap_dev); eth->tap_dev = NULL; } eth->tap_dev = strdup (val.str_val); if (NULL == eth->tap_dev) { fprintf (stderr, "ERROR: Peripheral Ethernet: Run out of memory\n"); exit (-1); } } /* eth_tap_dev() */ static void eth_vapi_id (union param_val val, void *dat) { struct eth_device *eth = dat; eth->base_vapi_id = val.int_val; } static void eth_phy_addr (union param_val val, void *dat) { struct eth_device *eth = dat; eth->phy_addr = val.int_val & ETH_MIIADDR_FIAD_MASK; } /*---------------------------------------------------------------------------*/ /*!Emulate MIIM transaction to ethernet PHY @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_miim_trans (void *dat) { struct eth_device *eth = dat; switch (eth->regs.miicommand) { case ((1 << ETH_MIICOMM_WCDATA_OFFSET)): /* Perhaps something to emulate here later, but for now do nothing */ break; case ((1 << ETH_MIICOMM_RSTAT_OFFSET)): /* printf("or1ksim: eth_miim_trans: phy %d\n",(int) ((eth->regs.miiaddress >> ETH_MIIADDR_FIAD_OFFSET)& ETH_MIIADDR_FIAD_MASK)); printf("or1ksim: eth_miim_trans: reg %d\n",(int) ((eth->regs.miiaddress >> ETH_MIIADDR_RGAD_OFFSET)& ETH_MIIADDR_RGAD_MASK)); */ /*First check if it's the correct PHY to address */ if (((eth->regs.miiaddress >> ETH_MIIADDR_FIAD_OFFSET)& ETH_MIIADDR_FIAD_MASK) == eth->phy_addr) { /* Correct PHY - now switch based on the register address in the PHY*/ switch ((eth->regs.miiaddress >> ETH_MIIADDR_RGAD_OFFSET)& ETH_MIIADDR_RGAD_MASK) { case MII_BMCR: eth->regs.miirx_data = BMCR_FULLDPLX; break; case MII_BMSR: eth->regs.miirx_data = BMSR_LSTATUS | BMSR_ANEGCOMPLETE | BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL; break; case MII_PHYSID1: eth->regs.miirx_data = 0x22; /* Micrel PHYID */ break; case MII_PHYSID2: eth->regs.miirx_data = 0x1613; /* Micrel PHYID */ break; case MII_ADVERTISE: eth->regs.miirx_data = ADVERTISE_FULL; break; case MII_LPA: eth->regs.miirx_data = LPA_DUPLEX | LPA_100; break; case MII_EXPANSION: eth->regs.miirx_data = 0; break; case MII_CTRL1000: eth->regs.miirx_data = 0; break; case MII_STAT1000: eth->regs.miirx_data = 0; break; case MII_ESTATUS: eth->regs.miirx_data = 0; break; case MII_DCOUNTER: eth->regs.miirx_data = 0; break; case MII_FCSCOUNTER: eth->regs.miirx_data = 0; break; case MII_NWAYTEST: eth->regs.miirx_data = 0; break; case MII_RERRCOUNTER: eth->regs.miirx_data = 0; break; case MII_SREVISION: eth->regs.miirx_data = 0; break; case MII_RESV1: eth->regs.miirx_data = 0; break; case MII_LBRERROR: eth->regs.miirx_data = 0; break; case MII_PHYADDR: eth->regs.miirx_data = eth->phy_addr; break; case MII_RESV2: eth->regs.miirx_data = 0; break; case MII_TPISTATUS: eth->regs.miirx_data = 0; break; case MII_NCONFIG: eth->regs.miirx_data = 0; break; default: eth->regs.miirx_data = 0xffff; break; } } else eth->regs.miirx_data = 0xffff; /* PHY doesn't exist, read all 1's */ break; case ((1 << ETH_MIICOMM_SCANS_OFFSET)): /* From MAC's datasheet: A host initiates the Scan Status Operation by asserting the SCANSTAT signal. The MIIM performs a continuous read operation of the PHY Status register. The PHY is selected by the FIAD[4:0] signals. The link status LinkFail signal is asserted/deasserted by the MIIM module and reflects the link status bit of the PHY Status register. The signal NVALID is used for qualifying the validity of the LinkFail signals and the status data PRSD[15:0]. These signals are invalid until the first scan status operation ends. During the scan status operation, the BUSY signal is asserted until the last read is performed (the scan status operation is stopped). So for now - do nothing, leave link status indicator as permanently with link. */ break; default: break; } } /*---------------------------------------------------------------------------*/ /*!Initialize a new Ethernet configuration ALL parameters are set explicitly to default values. */ /*---------------------------------------------------------------------------*/ static void * eth_sec_start (void) { struct eth_device *new = malloc (sizeof (struct eth_device)); if (!new) { fprintf (stderr, "Peripheral Eth: Run out of memory\n"); exit (-1); } memset (new, 0, sizeof (struct eth_device)); new->enabled = 1; new->baseaddr = 0; new->dma = 0; new->mac_int = 0; new->rtx_type = ETH_RTX_FILE; new->rx_channel = 0; new->tx_channel = 0; new->rtx_fd = 0; new->rxfile = strdup ("eth_rx"); new->txfile = strdup ("eth_tx"); new->tap_dev = strdup (""); new->base_vapi_id = 0; new->phy_addr = 0; return new; } static void eth_sec_end (void *dat) { struct eth_device *eth = dat; struct mem_ops ops; if (!eth->enabled) { free (eth->rxfile); free (eth->txfile); free (eth->tap_dev); free (eth); return; } memset (&ops, 0, sizeof (struct mem_ops)); ops.readfunc32 = eth_read32; ops.writefunc32 = eth_write32; ops.read_dat32 = dat; ops.write_dat32 = dat; /* FIXME: Correct delay? */ ops.delayr = 2; ops.delayw = 2; reg_mem_area (eth->baseaddr, ETH_ADDR_SPACE, 0, &ops); reg_sim_stat (eth_status, dat); reg_sim_reset (eth_reset, dat); } /*---------------------------------------------------------------------------*/ /*!Register a new Ethernet configuration */ /*---------------------------------------------------------------------------*/ void reg_ethernet_sec () { struct config_section *sec = reg_config_sec ("ethernet", eth_sec_start, eth_sec_end); reg_config_param (sec, "enabled", PARAMT_INT, eth_enabled); reg_config_param (sec, "baseaddr", PARAMT_ADDR, eth_baseaddr); reg_config_param (sec, "dma", PARAMT_INT, eth_dma); reg_config_param (sec, "irq", PARAMT_INT, eth_irq); reg_config_param (sec, "rtx_type", PARAMT_STR, eth_rtx_type); reg_config_param (sec, "rx_channel", PARAMT_INT, eth_rx_channel); reg_config_param (sec, "tx_channel", PARAMT_INT, eth_tx_channel); reg_config_param (sec, "rxfile", PARAMT_STR, eth_rxfile); reg_config_param (sec, "txfile", PARAMT_STR, eth_txfile); reg_config_param (sec, "tap_dev", PARAMT_STR, eth_tap_dev); reg_config_param (sec, "vapi_id", PARAMT_INT, eth_vapi_id); reg_config_param (sec, "phy_addr", PARAMT_INT, eth_phy_addr); } /* reg_ethernet_sec() */
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