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pci: Make MSI-X PBA read only

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Relying on the PCI specification, the Pending Bit Array is read only.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2019-06-06 08:52:11 -07:00 committed by Rob Bradford
parent bbd0f5eebb
commit 00cdbbc673
1 changed files with 2 additions and 30 deletions
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32
pci/src/msix.rs
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@ -130,36 +130,8 @@ impl MsixConfig {
}
}
pub fn write_pba(&mut self, offset: u64, data: &[u8]) {
assert!((data.len() == 4 || data.len() == 8));
let index: usize = (offset / MSIX_PBA_ENTRIES_MODULO) as usize;
let modulo_offset = offset % MSIX_PBA_ENTRIES_MODULO;
match data.len() {
4 => {
let value = LittleEndian::read_u32(data);
match modulo_offset {
0x0 => self.pba_entries[index] = u64::from(value),
0x4 => self.pba_entries[index] = u64::from(value) << 32,
_ => error!("invalid offset"),
}
debug!("MSI_W PBA offset 0x{:x} data 0x{:x}", offset, value);
}
8 => {
let value = LittleEndian::read_u64(data);
match modulo_offset {
0x0 => self.pba_entries[index] = value,
_ => error!("invalid offset"),
}
debug!("MSI_W PBA offset 0x{:x} data 0x{:x}", offset, value);
}
_ => {
error!("invalid data length");
}
}
pub fn write_pba(&mut self, _offset: u64, _data: &[u8]) {
error!("Pending Bit Array is read only");
}
}