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use core::ptr::NonNull;
use dma_api::DmaDirection;
use usb_if::transfer::Direction;
use crate::{
backend::ty::transfer::{Transfer, TransferKind},
osal::Kernel,
};
const ALIGN: usize = 64;
impl Transfer {
pub(crate) fn new(
dma: &Kernel,
kind: TransferKind,
direction: Direction,
buff: Option<(NonNull<u8>, usize)>,
) -> Self {
let dma_direction = match direction {
Direction::In => DmaDirection::FromDevice,
Direction::Out => DmaDirection::ToDevice,
};
let mapping = if let Some((ptr, len)) = buff {
let slice = unsafe { core::slice::from_raw_parts_mut(ptr.as_ptr(), len) };
Some(
dma.map_single_array(slice, ALIGN, dma_direction)
.expect("DMA mapping failed"),
)
} else {
None
};
Self {
kind,
direction,
mapping,
transfer_len: 0,
}
}
// pub(crate) fn new_in(dma: &Kernel, kind: TransferKind, buff: Pin<&mut [u8]>) -> Self {
// let buffer_addr = buff.as_ptr() as usize;
// let buffer_len = buff.len();
// trace!(
// "Transfer::new_in: addr={:#x}, len={}",
// buffer_addr, buffer_len
// );
// let mapping = if buffer_len > 0 {
// Some(
// dma.map_single_array(buff.get_mut(), ALIGN, DmaDirection::FromDevice)
// .expect("DMA mapping failed"),
// )
// } else {
// None
// };
// Self {
// kind,
// direction: usb_if::transfer::Direction::In,
// mapping,
// transfer_len: 0,
// }
// }
// pub(crate) fn new_out(kernel: &Kernel, kind: TransferKind, buff: Pin<&[u8]>) -> Self {
// let buffer_addr = buff.as_ptr() as usize;
// let buffer_len = buff.len();
// trace!(
// "Transfer::new_out: addr={:#x}, len={}",
// buffer_addr, buffer_len
// );
// let mapping = if buffer_len > 0 {
// Some(
// kernel
// .map_single_array(buff.get_ref(), ALIGN, DmaDirection::ToDevice)
// .expect("DMA mapping failed"),
// )
// } else {
// None
// };
// Self {
// kind,
// direction: Direction::Out,
// mapping,
// transfer_len: 0,
// }
// }
pub fn buffer_len(&self) -> usize {
if let Some(ref mapping) = self.mapping {
mapping.len()
} else {
0
}
}
pub fn dma_addr(&self) -> u64 {
if let Some(ref mapping) = self.mapping {
mapping.dma_addr().as_u64()
} else {
0
}
}
pub fn prepare_read_all(&self) {
if let Some(ref mapping) = self.mapping {
mapping.prepare_read_all();
}
}
pub fn confirm_write_all(&self) {
if let Some(ref mapping) = self.mapping {
mapping.confirm_write_all();
}
}
}