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#include "board.h"
#include <unistd.h>
#include <fstream>
#include <iostream>
#include <cassert>
#include <fcntl.h>
#include <string.h>
BoardInterface::BoardInterface(IFACE iface_type)
{
this -> iface_type = iface_type;
}
BoardInterface::~BoardInterface()
{
free(send_buf);
free(recv_buf);
close(to_card);
close(from_card);
}
int BoardInterface::init()
{
switch(iface_type)
{
case IFACE::XDMA:
{
int fpga_fd = open(TO_FPGA_DEFAULT.c_str(), O_RDWR);
if(fpga_fd<0)
{
std::cerr << "Open to card failed!" << std::endl;
return 1;
}
else
std::cout << "Opened " << TO_FPGA_DEFAULT << " -> " << fpga_fd << std::endl;
to_card = fpga_fd;
fpga_fd = open(FROM_FPGA_DEFAULT.c_str(), O_RDWR);
if(fpga_fd<0)
{
std::cerr << "Open to host failed!" << std::endl;
return 1;
}
else
std::cout << "Opened " << FROM_FPGA_DEFAULT << " -> " << fpga_fd << std::endl;
from_card = fpga_fd;
// allocate page size aligned X page size regions to our buffers
if (posix_memalign((void **)&send_buf, 4096 /*alignment */ , SEND_BUF_SIZE + (4096-(SEND_BUF_SIZE % 4096))) != 0)
{
std::cerr << "Send buffer allocation failed!" << std::endl;
return 1;
}
if (posix_memalign((void **)&recv_buf, 4096 /*alignment */ , RECV_BUF_SIZE + (4096-(RECV_BUF_SIZE % 4096))))
{
std::cerr << "Receive buffer allocation failed!" << std::endl;
return 1;
}
if( (!send_buf) || (!recv_buf) )
{
std::cerr << "Buffers cannot be allocated!" << std::endl;
return 1;
}
return 0;
}
default:
std::cerr << "Unknown iface_type!" << std::endl;
return 1;
}
}
int BoardInterface::sendData(void* data, const uint size)
{
switch(iface_type)
{
case IFACE::XDMA:
return xdma_send(data,size);
break;
default:
std::cerr << "Unknown iface_type!" << std::endl;
return 1;
}
}
int BoardInterface::recvData(void* buf, const uint size)
{
switch(iface_type)
{
case IFACE::XDMA:
return xdma_recv(buf,size);
break;
default:
std::cerr << "Unknown iface_type!" << std::endl;
return 1;
}
}
int BoardInterface::xdma_send(void* data, const uint size)
{
memcpy((char*)send_buf, (char*)data, size);
int fd = to_card;
ssize_t rc;
uint64_t count = 0;
char *buf = (char*) send_buf;
while (count < size) {
/* write data to file from memory buffer */
rc = write(fd, buf, size);
assert(rc == size || rc == 0);
count += rc;
}
// We wrote more than we supposed to
if (count != size)
return 1;
return 0;
}
int BoardInterface::xdma_recv(void* buf, const uint size)
{
assert(size <= RECV_BUF_SIZE && "given read size is too large");
int fd = from_card;
uint64_t count = 0;
// Try to read from the card.
count = read(fd, (char*) recv_buf, size);
// We read more than we were supposed to
assert(count <= size);// || rc == 0);
memcpy(buf, (char*) recv_buf, count);
return count;
}
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