X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=geekos%2Fsrc%2Fgeekos%2Fne2k.c;fp=geekos%2Fsrc%2Fgeekos%2Fne2k.c;h=aa11b62c730433e873b6d3a18ac6c206533aa0e9;hp=0000000000000000000000000000000000000000;hb=ddc16b0737cf58f7aa90a69c6652cdf4090aec51;hpb=626595465a2c6987606a6bc697df65130ad8c2d3

diff --git a/geekos/src/geekos/ne2k.c b/geekos/src/geekos/ne2k.c
new file mode 100644
index 0000000..aa11b62
--- /dev/null
+++ b/geekos/src/geekos/ne2k.c
@@ -0,0 +1,454 @@
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National 
+ * Science Foundation and the Department of Energy.  
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico.  You can find out more at 
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Matt Wojcik
+ * Copyright (c) 2008, Peter Kamm
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
+ * All rights reserved.
+ *
+ * Author: Matt Wojcik
+ * Author: Peter Kamm
+ *
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#include <geekos/ne2k.h>
+#include <geekos/debug.h>
+#include <geekos/io.h>
+#include <geekos/irq.h>
+#include <geekos/malloc.h>
+#include <geekos/string.h>
+
+#ifdef UIP
+#include <uip/uip.h>
+#include <uip/uip_arp.h>
+#endif
+
+#define DEBUG 1
+#define TX_START_BUFF 	0x40
+#define RX_START_BUFF 	0x4c
+#define RX_END_BUFF	0x80
+
+static uint_t next = (RX_START_BUFF << 8);
+static uint_t received = 0;
+static uint_t send_done = 1;
+
+struct NE2K_REGS* regs;
+
+struct callback {
+  int (*packet_received)(struct NE2K_Packet_Info *info, uchar_t *packet);
+} callbacks;
+
+#if DEBUG
+static void Dump_Registers()
+{
+  uint_t data;
+  PrintBoth("Dumping NIC registers for page %x...\n", (In_Byte(NE2K_CR) & 0xc0) >> 6);
+  uint_t i = 0;
+  for(i = 0; i <= 0x0f; i += 0x01) {
+    data = In_Byte(NE2K_BASE_ADDR+i);
+    PrintBoth("\t%x: %x\n", NE2K_BASE_ADDR + i, data);
+  }
+}
+#endif
+
+static void NE2K_Interrupt_Handler(struct Interrupt_State * state)
+{
+
+  Begin_IRQ(state);
+  PrintBoth("NIC Interrupt Occured!\n");
+  uchar_t isr_content = In_Byte(NE2K_ISR);
+
+  PrintBoth("Contents of ISR: %x\n", isr_content);
+
+  if(isr_content & 0x01) /* A packet has been received. */
+  {
+        uchar_t current;
+	Out_Byte(NE2K_CR, 0x4a);	/* Page 1 */
+	current = In_Byte(NE2K_CURR);
+	Out_Byte(NE2K_CR, 0x0a);	/* Page 0 */
+        NE2K_Receive();
+
+        /* When CURR equals BNRY, all packets in the receive ring buffer have been read, and
+           the packet received bit in the interrupt status register can be cleared. */
+        if(current == In_Byte(NE2K_BNRY))
+          Out_Byte(NE2K_ISR, 0x01);
+  }
+
+  End_IRQ(state);
+  if(isr_content & 0x02) /* A packet has been successfully transmitted. */
+  {
+    send_done = 1;  
+    Out_Byte(NE2K_ISR, 0x02);
+  }
+
+  //Out_Byte(NE2K_ISR, 0xff); /* Clear all interrupts. */
+}
+
+int Init_Ne2k(int (*rcvd_fn)(struct NE2K_Packet_Info *info, uchar_t *packet))
+{
+  callbacks.packet_received = rcvd_fn;
+
+  PrintBoth("Initializing network card...\n");
+  Out_Byte(NE2K_CR+0x1f, In_Byte(NE2K_CR+0x1f));  /* Reset */
+
+  regs = Malloc(sizeof(struct NE2K_REGS));
+  struct _CR * cr = (struct _CR *)&(regs->cr);
+  struct _RCR * rcr = (struct _RCR*)&(regs->rcr);
+  struct _IMR * imr = (struct _IMR *)&(regs->imr);
+
+  regs->cr = 0x21;
+  regs->dcr = 0x49; /* Word-wide DMA transfer. */
+  regs->isr = 0xff; /* Clear all interrupts. */
+  regs->rcr = 0x20; /* Accept packets shorter than 64 bytes. */
+  regs->tcr = 0x02; /* Internal loopback mode. */
+
+  Out_Byte(NE2K_CR, regs->cr);
+  Out_Byte(NE2K_DCR, regs->dcr);
+  Out_Byte(NE2K_ISR, regs->isr);
+  Out_Byte(NE2K_RCR, regs->rcr);
+  Out_Byte(NE2K_TCR, regs->tcr);
+  Out_Byte(NE2K_IMR, regs->imr);
+
+  /* Remote byte count registers. */
+  Out_Byte(NE2K_RBCR0, 0x00);
+  Out_Byte(NE2K_RBCR1, 0x00);
+  /* Remote start address registers. */
+  Out_Byte(NE2K_RSAR0, 0x00);
+  Out_Byte(NE2K_RSAR1, 0x00);
+
+  Out_Byte(NE2K_TPSR, TX_START_BUFF);		/* Transmit page start register */
+  Out_Byte(NE2K_PSTART, RX_START_BUFF);		/* Page start register */
+  Out_Byte(NE2K_PSTOP, RX_END_BUFF);     		/* Page stop register */
+  Out_Byte(NE2K_BNRY, RX_START_BUFF);		/* Boundary register */	
+
+  cr->ps = 0x01; /* Switch to reg page 1. */
+  Out_Byte(NE2K_CR, regs->cr);
+  /* Current page register: points to first free page that can be used for packet reception. */
+  Out_Byte(NE2K_CURR, RX_START_BUFF);
+  cr->ps = 0x00; /* Switch to page 0 */
+
+  Out_Byte(NE2K_CR, regs->cr);
+  Out_Byte(NE2K_ISR, regs->isr);
+
+  /* Interrupt mask register: setting a bit to 1 enables the
+     corresponding interrupt in ISR. */
+  imr->prxe = 0x1;
+  imr->ptxe = 0x1;
+  imr->rxee = 0x1;
+  imr->txee = 0x1;
+  imr->ovwe = 0x1;
+  imr->cnte = 0x1;
+  Out_Byte(NE2K_IMR, regs->imr);
+
+  cr->ps = 0x01;  /* Switch to reg page 1 */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  /* Set the physical address of the card */
+  Out_Byte(NE2K_CR+0x01, PHY_ADDR1);
+  Out_Byte(NE2K_CR+0x02, PHY_ADDR2);
+  Out_Byte(NE2K_CR+0x03, PHY_ADDR3);
+  Out_Byte(NE2K_CR+0x04, PHY_ADDR4);
+  Out_Byte(NE2K_CR+0x05, PHY_ADDR5);
+  Out_Byte(NE2K_CR+0x06, PHY_ADDR6);
+
+  /* Set the multicast address register to all 1s; accepts all multicast packets */
+  uint_t i;
+  for(i = 0x08; i <= 0x0f; i++) {
+    Out_Byte(NE2K_CR+i, 0xff);
+  }
+
+  regs->cr = 0x21;  //set CR to start value
+  Out_Byte(NE2K_CR, regs->cr);
+
+  regs->tcr = 0x00;
+  Out_Byte(NE2K_TCR, regs->tcr);
+
+  rcr->sep = 0x1;
+  rcr->ar = 0x1;
+  rcr->ab = 0x1;
+  rcr->am = 0x1;
+  rcr->pro = 0x1; /* Promiscuous mode: accept all packets. */
+  rcr->mon = 0x0;
+  Out_Byte(NE2K_RCR, regs->rcr);
+
+  cr->sta = 0x1;  // toggle start bit
+  cr->stp = 0x0;
+  Out_Byte(NE2K_CR, regs->cr);
+
+#if DEBUG
+  Dump_Registers();
+
+  cr->ps = 0x01;
+  Out_Byte(NE2K_CR, regs->cr);
+  Dump_Registers();
+
+  cr->ps = 0x02;
+  Out_Byte(NE2K_CR, regs->cr);
+  Dump_Registers();
+
+  cr->ps = 0x00;
+  Out_Byte(NE2K_CR, regs->cr);
+#endif
+
+  Install_IRQ(NE2K_IRQ, NE2K_Interrupt_Handler);
+  Enable_IRQ(NE2K_IRQ);
+#if 0
+  for(i = 0; i < 0; i++)
+  {
+    NE2K_Transmit(regs);
+    PrintBoth("Transmitting a packet\n");
+  }
+#endif
+/*
+  uchar_t src_addr[6] = { 0x52, 0x54, 0x00, 0x12, 0x34, 0x58 };
+  uchar_t dest_addr[6] = { 0x52, 0x54, 0x00, 0x12, 0x34, 0x56 };
+
+  uint_t size = 64;
+  uchar_t *data = Malloc(size);
+  data = "This is a 64-byte string that will be used to test transmission.";
+
+  for(i = 0; i < 0; i++) {
+    NE2K_Send(regs, src_addr, dest_addr, 0x01, data, size);
+  }
+*/
+  //Free(data);  // Why does this crash?
+
+  return 0;
+}
+
+/* 
+ * This function is called when there is data in uip_buf that's ready to be sent.
+ * uip_arp_out() is used to translate the destination IP address to a MAC address.
+ * If the corresponding MAC address isn't in the cache, the packet is replaced with
+ * an ARP packet, which is sent out instead.  The original packet will need to be
+ * retransmitted at some point in the future.
+ */
+#ifdef UIP
+
+int NE2K_Transmit(uint_t size)
+{
+  uip_arp_out();
+  uchar_t *data;
+  data = Malloc(size);
+
+  /* Based on example code from the uIP documentation... */
+  if(size <= UIP_LLH_LEN + UIP_TCPIP_HLEN) {
+    memcpy(data, &uip_buf[0], size);
+  } else {
+    memcpy(data, &uip_buf[0], UIP_LLH_LEN + UIP_TCPIP_HLEN);
+    memcpy(data + UIP_LLH_LEN + UIP_TCPIP_HLEN, uip_appdata, size - UIP_TCPIP_HLEN - UIP_LLH_LEN);
+  }
+
+  /* Manually copy in the source MAC address for now. */
+  uchar_t src_addr[6] = { 0x52, 0x54, 0x00, 0x12, 0x34, 0x58 };
+  memcpy(data + 6, src_addr, 6);
+  if(*(data+12) != 0x08 || *(data+13) != 0x06)
+  {
+    /* This is not an ARP packet. Fill in te size of the packet manually. */
+    *(data+12) = size & 0xff;
+    *(data+13) = (size >> 8) & 0xff;
+  }
+
+  NE2K_Send_Packet(data, size);
+  Free(data);
+  return 0;
+}
+
+#endif
+
+int NE2K_Send_Packet(uchar_t *packet, uint_t size)
+{
+  struct _CR * cr = (struct _CR*)&(regs->cr);
+  regs->cr = 0x21; /* Turn off remote DMA, stop command */
+  cr->stp = 0x0;  /* toggle start on */
+  cr->sta = 0x1;
+  Out_Byte(NE2K_CR, regs->cr);
+  
+  // Read-before-write bug fix?
+  Out_Byte(NE2K_RBCR0, 0x42);
+  Out_Byte(NE2K_RBCR1, 0x00);
+  Out_Byte(NE2K_RSAR0, 0x42);
+  Out_Byte(NE2K_RSAR1, 0x00);
+
+  cr->rd = 0x01;  /* set remote DMA to 'remote read' */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  regs->isr = 0x40;  /* clear 'remote DMA complete' interrupt */
+  Out_Byte(NE2K_ISR, regs->isr);
+  
+  /* Set remote byte count registers */
+  Out_Byte(NE2K_RBCR0, size & 0xff);
+  Out_Byte(NE2K_RBCR1, (size >> 8) & 0xff);
+
+  /* Set transmit byte count registers. */
+  Out_Byte(NE2K_TBCR0, size & 0xff);
+  Out_Byte(NE2K_TBCR1, (size >> 8) & 0xff);
+
+  /* Set remote start address registers to the first page of the transmit ring buffer. */
+  Out_Byte(NE2K_RSAR0, 0x00);
+  Out_Byte(NE2K_RSAR1, TX_START_BUFF);
+
+  cr->rd = 0x02; /* Set remote DMA to 'remote write' */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  /* Push the packet data to into the dataport */
+  uint_t i;
+  for(i = 0; i < size; i += 2) {
+    Out_Word(NE2K_CR + 0x10, (*(packet + i + 1) << 8) | *(packet + i));
+  }
+
+  cr->txp = 0x1; /* Start transmission */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  return 0;
+}
+
+#if 1
+/* Assumes src and dest are arrays of 6 characters. */
+int NE2K_Send(uchar_t src[], uchar_t dest[], uint_t type, uchar_t *data, uint_t size)
+{
+  struct _CR * cr = (struct _CR*)&(regs->cr);
+  uint_t packet_size = size + 16;
+  regs->cr = 0x21; /* Turn off remote DMA, stop command */
+  cr->stp = 0x0;  /* toggle start on */
+  cr->sta = 0x1;
+  Out_Byte(NE2K_CR, regs->cr);
+  
+  // Read-before-write bug fix?
+  Out_Byte(NE2K_RBCR0, 0x42);
+  Out_Byte(NE2K_RBCR1, 0x00);
+  Out_Byte(NE2K_RSAR0, 0x42);
+  Out_Byte(NE2K_RSAR1, 0x00);
+
+  cr->rd = 0x01;  /* set remote DMA to 'remote read' */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  regs->isr = 0x40;  /* clear 'remote DMA complete' interrupt */
+  Out_Byte(NE2K_ISR, regs->isr);
+  
+  /* Set remote byte count registers */
+  Out_Byte(NE2K_RBCR0, packet_size & 0xff);
+  Out_Byte(NE2K_RBCR1, (packet_size >> 8) & 0xff);
+
+  /* Set transmit byte count registers. */
+  Out_Byte(NE2K_TBCR0, packet_size & 0xff);
+  Out_Byte(NE2K_TBCR1, (packet_size >> 8) & 0xff);
+
+  /* Set remote start address registers to the first page of the transmit ring buffer. */
+  Out_Byte(NE2K_RSAR0, 0x00);
+  Out_Byte(NE2K_RSAR1, TX_START_BUFF);
+
+  cr->rd = 0x02; /* Set remote DMA to 'remote write' */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  /* Begin pushing the packet into the dataport (located at 0x10 from the base address). */
+  /* Destination Address */
+  Out_Word(NE2K_CR + 0x10, (dest[1] << 8) | dest[0]);
+  Out_Word(NE2K_CR + 0x10, (dest[3] << 8) | dest[2]);
+  Out_Word(NE2K_CR + 0x10, (dest[5] << 8) | dest[4]);
+
+  /* Source Address */
+  Out_Word(NE2K_CR + 0x10, (src[1] << 8) | src[0]);
+  Out_Word(NE2K_CR + 0x10, (src[3] << 8) | src[2]);
+  Out_Word(NE2K_CR + 0x10, (src[5] << 8) | src[4]);
+
+  /* Type */
+  Out_Word(NE2K_CR + 0x10, packet_size);
+
+  /* Packet data */
+  uint_t i;
+  for(i = 0; i < size; i += 2) {
+    Out_Word(NE2K_CR + 0x10, (*(data + i + 1) << 8) | *(data + i));
+  }
+
+  cr->txp = 0x1; /* Start transmission */
+  Out_Byte(NE2K_CR, regs->cr);
+
+  return 0;
+}
+#endif
+
+int NE2K_Receive()
+{
+  PrintBoth("Packet Received\n");
+
+  Out_Byte(NE2K_CR, 0x22);
+  /* Set RSAR to the start address of the received packet. */
+  Out_Byte(NE2K_RSAR0, next & 0xff);
+  Out_Byte(NE2K_RSAR1, next >> 8);
+  Out_Byte(NE2K_CR, 0x0a);
+
+  /* 
+   * A four byte header is added to the beginning of each received packet by the NIC.
+   * The first byte is the location of the next packet in the ring buffer.
+   * The second byte is the receive status code.
+   * The third and fourth bytes are the size of the packet.
+   */
+
+  uint_t i;
+  uint_t data;
+  data = In_Word(NE2K_CR + 0x10);
+
+#if DEBUG
+  PrintBoth("\nPacket data:\n\t");
+  PrintBoth("%x ", data);
+#endif
+
+  /* Get the location of the next packet */
+  next = data & 0xff00;
+
+  /* Retrieve the packet size from the header, and store it in RBCR. */
+  uint_t packet_size =  In_Word(NE2K_CR + 0x10) - 4;
+  uchar_t *packet = Malloc(packet_size);
+  Out_Byte(NE2K_RBCR0, packet_size & 0xff);
+  Out_Byte(NE2K_RBCR1, (packet_size>>8) & 0xff);
+
+#if DEBUG
+	PrintBoth("packetsize = %x\n\t", packet_size);
+#endif
+
+  /* Copy the received packet over from the ring buffer. */
+  for(i = 0; i < packet_size; i+=2) {
+    data = In_Word(NE2K_CR + 0x10);
+    *(packet + i) = data & 0x00ff;
+    *(packet + i + 1) = (data & 0xff00) >> 8;
+#if 0
+    PrintBoth("BNRY = %x\n", In_Byte(NE2K_BNRY));
+    Out_Byte(NE2K_CR, 0x4a);
+    PrintBoth("CURR = %x\n", In_Byte(NE2K_CURR));  
+    Out_Byte(NE2K_CR, 0x0a);
+#endif
+  }
+
+//Out_Byte(NE2K_RBCR0, (In_Byte(NE2K_RBCR0))-2);
+//Out_Byte(NE2K_RSAR0, (In_Byte(NE2K_RSAR0))+2);
+
+  PrintBoth("\n%d packets have been received", ++received);
+  PrintBoth("\n\n");
+
+  Out_Byte(NE2K_ISR, 0x40); /* Clear the remote DMA complete interrupt. */
+
+  /* The BNRY register stores the location of the first packet that hasn't been read yet */
+  Out_Byte(NE2K_BNRY, next >> 8);
+
+  struct NE2K_Packet_Info *info = Malloc(sizeof(struct NE2K_Packet_Info));
+  info->size = packet_size;
+  info->status = 0;
+  memcpy(info->dest, packet, 6);
+  memcpy(info->src, packet + 6, 6);
+  callbacks.packet_received(info, packet);
+
+  return 0;
+}
+
+
+
+