Add HypPciTransport.

src/transport/pci.rs

@@ -21,7 +21,7 @@ use core::{
 use zerocopy::{FromBytes, Immutable, IntoBytes};
 
 /// The PCI vendor ID for VirtIO devices.
-const VIRTIO_VENDOR_ID: u16 = 0x1af4;
+pub const VIRTIO_VENDOR_ID: u16 = 0x1af4;
 
 /// The offset to add to a VirtIO device ID to get the corresponding PCI device ID.
 const PCI_DEVICE_ID_OFFSET: u16 = 0x1040;
@@ -35,24 +35,24 @@ const TRANSITIONAL_ENTROPY_SOURCE: u16 = 0x1005;
 const TRANSITIONAL_9P_TRANSPORT: u16 = 0x1009;
 
 /// The offset of the bar field within `virtio_pci_cap`.
-const CAP_BAR_OFFSET: u8 = 4;
+pub(crate) const CAP_BAR_OFFSET: u8 = 4;
 /// The offset of the offset field with `virtio_pci_cap`.
-const CAP_BAR_OFFSET_OFFSET: u8 = 8;
+pub(crate) const CAP_BAR_OFFSET_OFFSET: u8 = 8;
 /// The offset of the `length` field within `virtio_pci_cap`.
-const CAP_LENGTH_OFFSET: u8 = 12;
+pub(crate) const CAP_LENGTH_OFFSET: u8 = 12;
 /// The offset of the`notify_off_multiplier` field within `virtio_pci_notify_cap`.
-const CAP_NOTIFY_OFF_MULTIPLIER_OFFSET: u8 = 16;
+pub(crate) const CAP_NOTIFY_OFF_MULTIPLIER_OFFSET: u8 = 16;
 
 /// Common configuration.
-const VIRTIO_PCI_CAP_COMMON_CFG: u8 = 1;
+pub const VIRTIO_PCI_CAP_COMMON_CFG: u8 = 1;
 /// Notifications.
-const VIRTIO_PCI_CAP_NOTIFY_CFG: u8 = 2;
+pub const VIRTIO_PCI_CAP_NOTIFY_CFG: u8 = 2;
 /// ISR Status.
-const VIRTIO_PCI_CAP_ISR_CFG: u8 = 3;
+pub const VIRTIO_PCI_CAP_ISR_CFG: u8 = 3;
 /// Device specific configuration.
-const VIRTIO_PCI_CAP_DEVICE_CFG: u8 = 4;
+pub const VIRTIO_PCI_CAP_DEVICE_CFG: u8 = 4;
 
-fn device_type(pci_device_id: u16) -> DeviceType {
+pub(crate) fn device_type(pci_device_id: u16) -> DeviceType {
     match pci_device_id {
         TRANSITIONAL_NETWORK => DeviceType::Network,
         TRANSITIONAL_BLOCK => DeviceType::Block,
@@ -389,34 +389,34 @@ impl Drop for PciTransport {
 
 /// `virtio_pci_common_cfg`, see 4.1.4.3 "Common configuration structure layout".
 #[repr(C)]
-struct CommonCfg {
-    device_feature_select: Volatile<u32>,
-    device_feature: ReadOnly<u32>,
-    driver_feature_select: Volatile<u32>,
-    driver_feature: Volatile<u32>,
-    msix_config: Volatile<u16>,
-    num_queues: ReadOnly<u16>,
-    device_status: Volatile<u8>,
-    config_generation: ReadOnly<u8>,
-    queue_select: Volatile<u16>,
-    queue_size: Volatile<u16>,
-    queue_msix_vector: Volatile<u16>,
-    queue_enable: Volatile<u16>,
-    queue_notify_off: Volatile<u16>,
-    queue_desc: Volatile<u64>,
-    queue_driver: Volatile<u64>,
-    queue_device: Volatile<u64>,
+pub(crate) struct CommonCfg {
+    pub device_feature_select: Volatile<u32>,
+    pub device_feature: ReadOnly<u32>,
+    pub driver_feature_select: Volatile<u32>,
+    pub driver_feature: Volatile<u32>,
+    pub msix_config: Volatile<u16>,
+    pub num_queues: ReadOnly<u16>,
+    pub device_status: Volatile<u8>,
+    pub config_generation: ReadOnly<u8>,
+    pub queue_select: Volatile<u16>,
+    pub queue_size: Volatile<u16>,
+    pub queue_msix_vector: Volatile<u16>,
+    pub queue_enable: Volatile<u16>,
+    pub queue_notify_off: Volatile<u16>,
+    pub queue_desc: Volatile<u64>,
+    pub queue_driver: Volatile<u64>,
+    pub queue_device: Volatile<u64>,
 }
 
 /// Information about a VirtIO structure within some BAR, as provided by a `virtio_pci_cap`.
 #[derive(Clone, Debug, Eq, PartialEq)]
-struct VirtioCapabilityInfo {
+pub(crate) struct VirtioCapabilityInfo {
     /// The bar in which the structure can be found.
-    bar: u8,
+    pub bar: u8,
     /// The offset within the bar.
-    offset: u32,
+    pub offset: u32,
     /// The length in bytes of the structure within the bar.
-    length: u32,
+    pub length: u32,
 }
 
 fn get_bar_region<H: Hal, T, C: ConfigurationAccess>(