Method read_table

pci/src/msix.rs:270–321

(&self, offset: u64, data: &mut [u8])

    }

    pub fn read_table(&self, offset: u64, data: &mut [u8]) {
        assert!(data.len() == 4 || data.len() == 8);

        let index: usize = (offset / MSIX_TABLE_ENTRIES_MODULO) as usize;
        let modulo_offset = offset % MSIX_TABLE_ENTRIES_MODULO;

        if index >= self.table_entries.len() {
            debug!("Invalid MSI-X table entry index {index}");
            data.copy_from_slice(&[0xff; 8][..data.len()]);
            return;
        }

        match data.len() {
            4 => {
                let value = match modulo_offset {
                    0x0 => self.table_entries[index].msg_addr_lo,
                    0x4 => self.table_entries[index].msg_addr_hi,
                    0x8 => self.table_entries[index].msg_data,
                    0xc => self.table_entries[index].vector_ctl,
                    _ => {
                        error!("invalid offset");
                        0
                    }
                };

                debug!("MSI_R TABLE offset 0x{offset:x} data 0x{value:x}");
                LittleEndian::write_u32(data, value);
            }
            8 => {
                let value = match modulo_offset {
                    0x0 => {
                        (u64::from(self.table_entries[index].msg_addr_hi) << 32)
                            | u64::from(self.table_entries[index].msg_addr_lo)
                    }
                    0x8 => {
                        (u64::from(self.table_entries[index].vector_ctl) << 32)
                            | u64::from(self.table_entries[index].msg_data)
                    }
                    _ => {
                        error!("invalid offset");
                        0
                    }
                };

                debug!("MSI_R TABLE offset 0x{offset:x} data 0x{value:x}");
                LittleEndian::write_u64(data, value);
            }
            _ => {
                error!("invalid data length");
            }
        }
    }

    pub fn write_table(&mut self, offset: u64, data: &[u8]) {
        if data.len() != 4 && data.len() != 8 {