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Fix accesses to VirtIO queue DMA

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This commit is contained in:
Ruihan Li
2024-08-06 00:06:02 +10:00
committed by Tate, Hongliang Tian
parent 3deff2e842
commit b1ea422efa
2 changed files with 58 additions and 26 deletions
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24
kernel/libs/aster-util/src/safe_ptr.rs
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@ -7,7 +7,7 @@ use aster_rights_proc::require;
use inherit_methods_macro::inherit_methods;
pub use ostd::Pod;
use ostd::{
mm::{Daddr, DmaStream, HasDaddr, HasPaddr, Paddr, VmIo},
mm::{Daddr, DmaStream, HasDaddr, HasPaddr, Paddr, PodOnce, VmIo, VmIoOnce},
Result,
};
pub use typeflags_util::SetContain;
@ -324,6 +324,28 @@ impl<T: Pod, M: VmIo, R: TRights> SafePtr<T, M, TRightSet<R>> {
}
}
impl<T: PodOnce, M: VmIoOnce, R: TRights> SafePtr<T, M, TRightSet<R>> {
/// Reads the value from the pointer using one non-tearing instruction.
///
/// # Access rights
///
/// This method requires the `Read` right.
#[require(R > Read)]
pub fn read_once(&self) -> Result<T> {
self.vm_obj.read_once(self.offset)
}
/// Overwrites the value at the pointer using one non-tearing instruction.
///
/// # Access rights
///
/// This method requires the `Write` right.
#[require(R > Write)]
pub fn write_once(&self, val: &T) -> Result<()> {
self.vm_obj.write_once(self.offset, val)
}
}
impl<T, M: HasDaddr, R> HasDaddr for SafePtr<T, M, R> {
fn daddr(&self) -> Daddr {
self.offset + self.vm_obj.daddr()