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Assert active and dfu have same erase size and copy in smaller chunks

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The copy from active to dfu (and vice versa) is now done in smaller portions depending on aligned_buf, which now does not need to be erase_size big.
This commit is contained in:
Rasmus Melchior Jacobsen 2023-04-04 21:09:30 +02:00
parent 9242ad89d4
commit 25577e0eaf
4 changed files with 118 additions and 57 deletions
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66
embassy-boot/boot/src/boot_loader.rs
View File

@ -32,14 +32,13 @@ where
/// Extension of the embedded-storage flash type information with block size and erase value.
pub trait Flash: NorFlash {
/// The block size that should be used when writing to flash. For most builtin flashes, this is the same as the erase
/// size of the flash, but for external QSPI flash modules, this can be lower.
const BLOCK_SIZE: usize;
/// The erase value of the flash. Typically the default of 0xFF is used, but some flashes use a different value.
const ERASE_VALUE: u8 = 0xFF;
}
/// Trait defining the flash handles used for active and DFU partition
/// Trait defining the flash handles used for active and DFU partition.
/// The ACTIVE and DFU erase sizes must be equal. If this is not the case, then consider adding an adapter for the
/// smallest flash to increase its erase size such that they match. See e.g. [`crate::large_erase::LargeErase`].
pub trait FlashConfig {
/// Flash type used for the state partition.
type STATE: Flash;
@ -62,12 +61,12 @@ trait FlashConfigEx {
impl<T: FlashConfig> FlashConfigEx for T {
fn page_size() -> usize {
core::cmp::max(T::ACTIVE::ERASE_SIZE, T::DFU::ERASE_SIZE)
assert_eq!(T::ACTIVE::ERASE_SIZE, T::DFU::ERASE_SIZE);
T::ACTIVE::ERASE_SIZE
}
}
/// BootLoader works with any flash implementing embedded_storage and can also work with
/// different page sizes and flash write sizes.
/// BootLoader works with any flash implementing embedded_storage.
pub struct BootLoader {
// Page with current state of bootloader. The state partition has the following format:
// All ranges are in multiples of WRITE_SIZE bytes.
@ -184,7 +183,9 @@ impl BootLoader {
///
pub fn prepare_boot<P: FlashConfig>(&mut self, p: &mut P, aligned_buf: &mut [u8]) -> Result<State, BootError> {
// Ensure we have enough progress pages to store copy progress
assert_eq!(aligned_buf.len(), P::page_size());
assert_eq!(0, P::page_size() % aligned_buf.len());
assert_eq!(0, P::page_size() % P::ACTIVE::WRITE_SIZE);
assert_eq!(0, P::page_size() % P::DFU::WRITE_SIZE);
assert!(aligned_buf.len() >= P::STATE::WRITE_SIZE);
assert_partitions(self.active, self.dfu, self.state, P::page_size(), P::STATE::WRITE_SIZE);
@ -277,20 +278,18 @@ impl BootLoader {
aligned_buf: &mut [u8],
) -> Result<(), BootError> {
if self.current_progress(p, aligned_buf)? <= idx {
let mut offset = from_offset;
for chunk in aligned_buf.chunks_mut(P::DFU::BLOCK_SIZE) {
self.dfu.read_blocking(p.dfu(), offset, chunk)?;
offset += chunk.len() as u32;
}
let page_size = P::page_size() as u32;
self.active
.erase_blocking(p.active(), to_offset, to_offset + P::page_size() as u32)?;
.erase_blocking(p.active(), to_offset, to_offset + page_size)?;
let mut offset = to_offset;
for chunk in aligned_buf.chunks(P::ACTIVE::BLOCK_SIZE) {
self.active.write_blocking(p.active(), offset, chunk)?;
offset += chunk.len() as u32;
for offset_in_page in (0..page_size).step_by(aligned_buf.len()) {
self.dfu
.read_blocking(p.dfu(), from_offset + offset_in_page as u32, aligned_buf)?;
self.active
.write_blocking(p.active(), to_offset + offset_in_page as u32, aligned_buf)?;
}
self.update_progress(idx, p, aligned_buf)?;
}
Ok(())
@ -305,20 +304,18 @@ impl BootLoader {
aligned_buf: &mut [u8],
) -> Result<(), BootError> {
if self.current_progress(p, aligned_buf)? <= idx {
let mut offset = from_offset;
for chunk in aligned_buf.chunks_mut(P::ACTIVE::BLOCK_SIZE) {
self.active.read_blocking(p.active(), offset, chunk)?;
offset += chunk.len() as u32;
}
let page_size = P::page_size() as u32;
self.dfu
.erase_blocking(p.dfu(), to_offset as u32, to_offset + P::page_size() as u32)?;
.erase_blocking(p.dfu(), to_offset as u32, to_offset + page_size)?;
let mut offset = to_offset;
for chunk in aligned_buf.chunks(P::DFU::BLOCK_SIZE) {
self.dfu.write_blocking(p.dfu(), offset, chunk)?;
offset += chunk.len() as u32;
for offset_in_page in (0..page_size).step_by(aligned_buf.len()) {
self.active
.read_blocking(p.active(), from_offset + offset_in_page as u32, aligned_buf)?;
self.dfu
.write_blocking(p.dfu(), to_offset + offset_in_page as u32, aligned_buf)?;
}
self.update_progress(idx, p, aligned_buf)?;
}
Ok(())
@ -389,14 +386,14 @@ fn assert_partitions(active: Partition, dfu: Partition, state: Partition, page_s
}
/// A flash wrapper implementing the Flash and embedded_storage traits.
pub struct BootFlash<F, const BLOCK_SIZE: usize, const ERASE_VALUE: u8 = 0xFF>
pub struct BootFlash<F, const ERASE_VALUE: u8 = 0xFF>
where
F: NorFlash + ReadNorFlash,
{
flash: F,
}
impl<F, const BLOCK_SIZE: usize, const ERASE_VALUE: u8> BootFlash<F, BLOCK_SIZE, ERASE_VALUE>
impl<F, const ERASE_VALUE: u8> BootFlash<F, ERASE_VALUE>
where
F: NorFlash + ReadNorFlash,
{
@ -406,22 +403,21 @@ where
}
}
impl<F, const BLOCK_SIZE: usize, const ERASE_VALUE: u8> Flash for BootFlash<F, BLOCK_SIZE, ERASE_VALUE>
impl<F, const ERASE_VALUE: u8> Flash for BootFlash<F, ERASE_VALUE>
where
F: NorFlash + ReadNorFlash,
{
const BLOCK_SIZE: usize = BLOCK_SIZE;
const ERASE_VALUE: u8 = ERASE_VALUE;
}
impl<F, const BLOCK_SIZE: usize, const ERASE_VALUE: u8> ErrorType for BootFlash<F, BLOCK_SIZE, ERASE_VALUE>
impl<F, const ERASE_VALUE: u8> ErrorType for BootFlash<F, ERASE_VALUE>
where
F: ReadNorFlash + NorFlash,
{
type Error = F::Error;
}
impl<F, const BLOCK_SIZE: usize, const ERASE_VALUE: u8> NorFlash for BootFlash<F, BLOCK_SIZE, ERASE_VALUE>
impl<F, const ERASE_VALUE: u8> NorFlash for BootFlash<F, ERASE_VALUE>
where
F: ReadNorFlash + NorFlash,
{
@ -437,7 +433,7 @@ where
}
}
impl<F, const BLOCK_SIZE: usize, const ERASE_VALUE: u8> ReadNorFlash for BootFlash<F, BLOCK_SIZE, ERASE_VALUE>
impl<F, const ERASE_VALUE: u8> ReadNorFlash for BootFlash<F, ERASE_VALUE>
where
F: ReadNorFlash + NorFlash,
{

76
embassy-boot/boot/src/large_erase.rs Normal file
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@ -0,0 +1,76 @@
#![allow(unused)]
use embedded_storage::nor_flash::{ErrorType, NorFlash, ReadNorFlash};
use embedded_storage_async::nor_flash::{NorFlash as AsyncNorFlash, ReadNorFlash as AsyncReadNorFlash};
use crate::Flash;
pub struct LargeErase<F, const ERASE_SIZE: usize>(pub F);
impl<F, const ERASE_SIZE: usize> LargeErase<F, ERASE_SIZE> {
pub const fn new(flash: F) -> Self {
Self(flash)
}
}
impl<F: Flash, const ERASE_SIZE: usize> Flash for LargeErase<F, ERASE_SIZE> {
const ERASE_VALUE: u8 = F::ERASE_VALUE;
}
impl<F: ErrorType, const ERASE_SIZE: usize> ErrorType for LargeErase<F, ERASE_SIZE> {
type Error = F::Error;
}
impl<F: NorFlash, const ERASE_SIZE: usize> NorFlash for LargeErase<F, ERASE_SIZE> {
const WRITE_SIZE: usize = F::ERASE_SIZE;
const ERASE_SIZE: usize = ERASE_SIZE;
fn erase(&mut self, from: u32, to: u32) -> Result<(), Self::Error> {
assert!(ERASE_SIZE >= F::ERASE_SIZE);
assert_eq!(0, ERASE_SIZE % F::ERASE_SIZE);
self.0.erase(from, to)
}
fn write(&mut self, offset: u32, bytes: &[u8]) -> Result<(), Self::Error> {
self.0.write(offset, bytes)
}
}
impl<F: ReadNorFlash, const ERASE_SIZE: usize> ReadNorFlash for LargeErase<F, ERASE_SIZE> {
const READ_SIZE: usize = F::READ_SIZE;
fn read(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), Self::Error> {
self.0.read(offset, bytes)
}
fn capacity(&self) -> usize {
self.0.capacity()
}
}
impl<F: AsyncNorFlash, const ERASE_SIZE: usize> AsyncNorFlash for LargeErase<F, ERASE_SIZE> {
const WRITE_SIZE: usize = F::ERASE_SIZE;
const ERASE_SIZE: usize = ERASE_SIZE;
async fn erase(&mut self, from: u32, to: u32) -> Result<(), Self::Error> {
assert!(ERASE_SIZE >= F::ERASE_SIZE);
assert_eq!(0, ERASE_SIZE % F::ERASE_SIZE);
self.0.erase(from, to).await
}
async fn write(&mut self, offset: u32, bytes: &[u8]) -> Result<(), Self::Error> {
self.0.write(offset, bytes).await
}
}
impl<F: AsyncReadNorFlash, const ERASE_SIZE: usize> AsyncReadNorFlash for LargeErase<F, ERASE_SIZE> {
const READ_SIZE: usize = F::READ_SIZE;
async fn read(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), Self::Error> {
self.0.read(offset, bytes).await
}
fn capacity(&self) -> usize {
self.0.capacity()
}
}

32
embassy-boot/boot/src/lib.rs
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@ -7,6 +7,7 @@ mod fmt;
mod boot_loader;
mod firmware_updater;
mod large_erase;
mod mem_flash;
mod partition;
@ -48,6 +49,7 @@ mod tests {
use futures::executor::block_on;
use super::*;
use crate::large_erase::LargeErase;
use crate::mem_flash::MemFlash;
/*
@ -99,14 +101,10 @@ mod tests {
let mut bootloader: BootLoader = BootLoader::new(ACTIVE, DFU, STATE);
let mut updater = FirmwareUpdater::new(DFU, STATE);
let mut offset = 0;
for chunk in update.chunks(4096) {
block_on(updater.write_firmware(offset, chunk, &mut flash)).unwrap();
offset += chunk.len();
}
block_on(updater.write_firmware(0, &update, &mut flash)).unwrap();
block_on(updater.mark_updated(&mut flash, &mut aligned)).unwrap();
let mut page = [0; 4096];
let mut page = [0; 1024];
assert_eq!(
State::Swap,
bootloader
@ -158,7 +156,7 @@ mod tests {
const DFU: Partition = Partition::new(0, 16384);
let mut active = MemFlash::<16384, 4096, 8>::random();
let mut dfu = MemFlash::<16384, 2048, 8>::random();
let mut dfu = LargeErase::<_, 4096>::new(MemFlash::<16384, 2048, 8>::random());
let mut state = MemFlash::<4096, 128, 4>::random();
let mut aligned = [0; 4];
@ -171,11 +169,7 @@ mod tests {
let mut updater = FirmwareUpdater::new(DFU, STATE);
let mut offset = 0;
for chunk in update.chunks(2048) {
block_on(updater.write_firmware(offset, chunk, &mut dfu)).unwrap();
offset += chunk.len();
}
block_on(updater.write_firmware(0, &update, &mut dfu)).unwrap();
block_on(updater.mark_updated(&mut state, &mut aligned)).unwrap();
let mut bootloader: BootLoader = BootLoader::new(ACTIVE, DFU, STATE);
@ -194,7 +188,7 @@ mod tests {
// First DFU page is untouched
for i in DFU.from + 4096..DFU.to {
assert_eq!(dfu.mem[i], original[i - DFU.from - 4096], "Index {}", i);
assert_eq!(dfu.0.mem[i], original[i - DFU.from - 4096], "Index {}", i);
}
}
@ -206,7 +200,7 @@ mod tests {
const DFU: Partition = Partition::new(0, 16384);
let mut aligned = [0; 4];
let mut active = MemFlash::<16384, 2048, 4>::random();
let mut active = LargeErase::<_, 4096>::new(MemFlash::<16384, 2048, 4>::random());
let mut dfu = MemFlash::<16384, 4096, 8>::random();
let mut state = MemFlash::<4096, 128, 4>::random();
@ -214,16 +208,12 @@ mod tests {
let update: [u8; DFU.len()] = [rand::random::<u8>(); DFU.len()];
for i in ACTIVE.from..ACTIVE.to {
active.mem[i] = original[i - ACTIVE.from];
active.0.mem[i] = original[i - ACTIVE.from];
}
let mut updater = FirmwareUpdater::new(DFU, STATE);
let mut offset = 0;
for chunk in update.chunks(4096) {
block_on(updater.write_firmware(offset, chunk, &mut dfu)).unwrap();
offset += chunk.len();
}
block_on(updater.write_firmware(0, &update, &mut dfu)).unwrap();
block_on(updater.mark_updated(&mut state, &mut aligned)).unwrap();
let mut bootloader: BootLoader = BootLoader::new(ACTIVE, DFU, STATE);
@ -239,7 +229,7 @@ mod tests {
);
for i in ACTIVE.from..ACTIVE.to {
assert_eq!(active.mem[i], update[i - ACTIVE.from], "Index {}", i);
assert_eq!(active.0.mem[i], update[i - ACTIVE.from], "Index {}", i);
}
// First DFU page is untouched

1
embassy-boot/boot/src/mem_flash.rs
View File

@ -47,7 +47,6 @@ impl<const SIZE: usize, const ERASE_SIZE: usize, const WRITE_SIZE: usize> Defaul
impl<const SIZE: usize, const ERASE_SIZE: usize, const WRITE_SIZE: usize> Flash
for MemFlash<SIZE, ERASE_SIZE, WRITE_SIZE>
{
const BLOCK_SIZE: usize = ERASE_SIZE;
const ERASE_VALUE: u8 = 0xFF;
}