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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
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@ -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,
{