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copy_device: add new utility

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This commit is contained in:
Julian Orth 2026-02-14 23:03:09 +01:00
parent f2a0221c9e
commit fa897f0f76
9 changed files with 2068 additions and 10 deletions
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5
src/udmabuf.rs
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@ -7,7 +7,7 @@ use {
oserror::OsError, page_size::page_size,
},
video::{
LINEAR_MODIFIER, Modifier,
LINEAR_MODIFIER, LINEAR_STRIDE_ALIGN, Modifier,
dmabuf::{DmaBuf, DmaBufIds, DmaBufPlane, PlaneVec},
drm::Drm,
},
@ -139,8 +139,7 @@ impl Allocator for Udmabuf {
if height > 1 << 16 || width > 1 << 16 {
return Err(UdmabufError::Overflow.into());
}
let stride_mask = 255;
let stride = (width * format.bpp as u64 + stride_mask) & !stride_mask;
let stride = (width * format.bpp as u64).next_multiple_of(LINEAR_STRIDE_ALIGN);
let size_mask = page_size() as u64 - 1;
let size = (height * stride + size_mask) & !size_mask;
let memfd = match uapi::memfd_create("udmabuf", MFD_ALLOW_SEALING) {