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//
// Copyright 2013 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/transport/nirio/nirio_driver_iface.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
namespace nirio_driver_iface {
nirio_status rio_open(
const std::string& device_path,
rio_dev_handle_t& device_handle)
{
device_handle = ::open(device_path.c_str(), O_RDWR | O_CLOEXEC);
return (device_handle < 0) ? NiRio_Status_InvalidParameter : NiRio_Status_Success;
}
void rio_close(rio_dev_handle_t& device_handle)
{
::close(device_handle);
device_handle = -1;
}
bool rio_isopen(rio_dev_handle_t device_handle)
{
return (device_handle >= 0);
}
nirio_status rio_ioctl(
rio_dev_handle_t device_handle,
uint32_t ioctl_code,
const void *write_buf,
size_t write_buf_len,
void *read_buf,
size_t read_buf_len)
{
nirio_ioctl_block_t ioctl_block = {0,0,0,0,0,0};
// two-casts necessary to prevent pointer sign-extension
ioctl_block.in_buf = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(write_buf));
ioctl_block.in_buf_len = write_buf_len;
ioctl_block.out_buf = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(read_buf));
ioctl_block.out_buf_len = read_buf_len;
int status = ::ioctl(device_handle, ioctl_code, &ioctl_block);
if (status == -1) {
switch (errno) {
case EINVAL: return NiRio_Status_InvalidParameter;
case EFAULT: return NiRio_Status_MemoryFull;
default: return NiRio_Status_SoftwareFault;
}
} else {
return NiRio_Status_Success;
}
}
nirio_status rio_mmap(
rio_dev_handle_t device_handle,
uint16_t memory_type,
size_t size,
bool writable,
rio_mmap_t &map)
{
int access_mode = PROT_READ; //Write-only mode not supported
if (writable) access_mode |= PROT_WRITE;
map.addr = ::mmap(NULL, size, access_mode, MAP_SHARED, device_handle, (off_t) memory_type * sysconf(_SC_PAGESIZE));
map.size = size;
if (map.addr == MAP_FAILED) {
map.addr = NULL;
map.size = 0;
switch (errno) {
case EINVAL: return NiRio_Status_InvalidParameter;
case EFAULT: return NiRio_Status_MemoryFull;
default: return NiRio_Status_SoftwareFault;
}
}
return NiRio_Status_Success;
}
nirio_status rio_munmap(rio_mmap_t &map)
{
nirio_status status = 0;
if (map.addr != NULL) {
status = ::munmap(map.addr, map.size);
map.addr = NULL;
map.size = 0;
}
return status;
}
}
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