Use correct offset for PCI I/O

src/aml/mod.rs

@@ -2527,10 +2527,11 @@ where
             }),
             RegionSpace::PciConfig => {
                 let address = self.pci_address_for_device(&region.parent_device_path)?;
+                let offset = region.base as u16 + offset as u16;
                 match length {
-                    1 => Ok(self.handler.read_pci_u8(address, offset as u16) as u64),
-                    2 => Ok(self.handler.read_pci_u16(address, offset as u16) as u64),
-                    4 => Ok(self.handler.read_pci_u32(address, offset as u16) as u64),
+                    1 => Ok(self.handler.read_pci_u8(address, offset) as u64),
+                    2 => Ok(self.handler.read_pci_u16(address, offset) as u64),
+                    4 => Ok(self.handler.read_pci_u32(address, offset) as u64),
                     _ => panic!(),
                 }
             }
@@ -2593,10 +2594,11 @@ where
             }
             RegionSpace::PciConfig => {
                 let address = self.pci_address_for_device(&region.parent_device_path)?;
+                let offset = region.base as u16 + offset as u16;
                 match length {
-                    1 => self.handler.write_pci_u8(address, offset as u16, value as u8),
-                    2 => self.handler.write_pci_u16(address, offset as u16, value as u16),
-                    4 => self.handler.write_pci_u32(address, offset as u16, value as u32),
+                    1 => self.handler.write_pci_u8(address, offset, value as u8),
+                    2 => self.handler.write_pci_u16(address, offset, value as u16),
+                    4 => self.handler.write_pci_u32(address, offset, value as u32),
                     _ => panic!(),
                 }
                 Ok(())

tests/operation_region.rs

@@ -0,0 +1,181 @@
+use aml_test_tools::handlers::std_test_handler::{Command, construct_std_handler, create_mutex, read_u8, write_pci_u8, write_u8, read_pci_u8};
+use pci_types::PciAddress;
+
+mod test_infra;
+
+#[test]
+fn test_region_in_top_level() {
+    const AML: &str = r#"DefinitionBlock("", "DSDT", 1, "RSACPI", "OPREG", 1) {
+    OperationRegion(MEM, SystemMemory, 0x40000, 0x1000)
+    Field(MEM, ByteAcc, NoLock, Preserve) {
+        DATA, 8
+    }
+
+    Method(RDWR, 0, NotSerialized) {
+        DATA = 0xA5
+        Return (DATA)
+    }
+
+    Method(MAIN, 0, NotSerialized) {
+        Local0 = RDWR()
+        // Remember that returning zero indicates success.
+        Return (Local0 != 0xA5)
+    }
+}
+"#;
+
+    const EXPECTED_COMMANDS: &[Command] = &[
+        create_mutex(),
+        // DATA = 0xA5
+        write_u8(0x40000, 0xA5),
+        read_u8(0x40000, 0xA5),
+    ];
+
+    let handler = construct_std_handler(EXPECTED_COMMANDS.to_vec());
+    test_infra::run_aml_test(AML, handler);
+}
+
+#[test]
+fn test_region_in_device() {
+    const AML: &str = r#"DefinitionBlock("", "DSDT", 1, "RSACPI", "OPREG", 1) {
+    Device(TEST) {
+        Name (_HID, EisaId ("PNP0C01")) // Arbitrary choice.
+
+        OperationRegion(MEM, SystemMemory, 0x40000, 0x1000)
+        Field(MEM, ByteAcc, NoLock, Preserve) {
+            DATA, 8
+        }
+
+        Method(RDWR, 0, NotSerialized) {
+            DATA = 0xA5
+            Return (DATA)
+        }
+    }
+
+    Method(MAIN, 0, NotSerialized) {
+        Local0 = ^TEST.RDWR()
+        // Remember that returning zero indicates success.
+        Return (Local0 != 0xA5)
+    }
+}
+"#;
+
+    const EXPECTED_COMMANDS: &[Command] = &[
+        create_mutex(),
+        // DATA = 0xA5
+        write_u8(0x40000, 0xA5),
+        read_u8(0x40000, 0xA5),
+    ];
+
+    let handler = construct_std_handler(EXPECTED_COMMANDS.to_vec());
+    test_infra::run_aml_test(AML, handler);
+}
+
+#[test]
+fn test_region_in_method() {
+    const AML: &str = r#"DefinitionBlock("", "DSDT", 1, "RSACPI", "OPREG", 1) {
+
+    // `iasl` is not a fan of this function - it generates a bunch of warnings, which for testing
+    // purposes can be ignored.
+    Method(RDWR, 1, NotSerialized) {
+        OperationRegion(MEM, SystemMemory, Arg0, 0x1000)
+        Field(MEM, ByteAcc, NoLock, Preserve) {
+            DATA, 8
+        }
+
+        DATA = 0xA5
+        Return (DATA)
+    }
+
+    Method(MAIN, 0, NotSerialized) {
+        Local0 = RDWR(0x40000)
+        // Remember that returning zero indicates success.
+        if (Local0 != 0xA5) {
+            Return (One)
+        }
+
+        Local0 = RDWR(0x50000)
+        Return (Local0 != 0xA5)
+    }
+}
+"#;
+
+    const EXPECTED_COMMANDS: &[Command] = &[
+        create_mutex(),
+        // Base set to 0x40000
+        write_u8(0x40000, 0xA5),
+        read_u8(0x40000, 0xA5),
+        // Base set to 0x50000
+        write_u8(0x50000, 0xA5),
+        read_u8(0x50000, 0xA5),
+    ];
+
+    let handler = construct_std_handler(EXPECTED_COMMANDS.to_vec());
+    test_infra::run_aml_test(AML, handler);
+}
+
+#[test]
+#[ignore]
+fn test_buffer_field_implicit_conv() {
+    // This test covers https://github.com/rust-osdev/acpi/issues/273
+    const AML: &str = r#"DefinitionBlock ("", "SSDT", 2, "AMD", "AmdTable", 0x00000002)
+{
+    Name (ADAT, Buffer (0x0010)
+    {
+        /* 0000 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // ........
+        /* 0008 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // ........
+
+    })
+    OperationRegion (A053, SystemMemory, (DerefOf (ADAT [(0x04)])), 0x1000) // <--- this line failed
+    Field (A053, ByteAcc, NoLock, Preserve)
+    {
+        Offset (0x18),
+        A, 8
+    }
+}"#;
+
+    const EXPECTED_COMMANDS: &[Command] = &[create_mutex()];
+
+    let handler = construct_std_handler(EXPECTED_COMMANDS.to_vec());
+    test_infra::run_aml_test(AML, handler);
+}
+
+#[test]
+fn test_region_in_pci_device() {
+    const AML: &str = r#"DefinitionBlock("", "DSDT", 1, "RSACPI", "OPREG", 1) {
+    Device(TEST) {
+        Name (_ADR, 0x00020001) // Arbitrary choice.
+        Name (_BBN, 3)
+        Name (_SEG, 4)
+
+        OperationRegion(MEM, PCI_Config, 0x40, 0x20)
+        Field(MEM, ByteAcc, NoLock, Preserve) {
+        Offset (0x10),
+            DATA, 8
+        }
+
+        Method(RDWR, 0, NotSerialized) {
+            DATA = 0xA5
+            Return (DATA)
+        }
+    }
+
+    Method(MAIN, 0, NotSerialized) {
+        Local0 = ^TEST.RDWR()
+        // Remember that returning zero indicates success.
+        Return (Local0 != 0xA5)
+    }
+}
+"#;
+
+    let address: PciAddress = PciAddress::new(4, 3, 2, 1);
+    let expected_commands: &[Command] = &[
+        create_mutex(),
+        // DATA = 0xA5
+        write_pci_u8(address, 0x50, 0xA5),
+        read_pci_u8(address, 0x50, 0xA5),
+    ];
+
+    let handler = construct_std_handler(expected_commands.to_vec());
+    test_infra::run_aml_test(AML, handler);
+}