continue

zynq7000-hal/src/eth/tx_descr.rs

@@ -0,0 +1,53 @@
+use arbitrary_int::u14;
+
+pub use super::Ownership;
+
+/// RX buffer descriptor.
+///
+/// The user should declare an array of this structure inside uncached memory.
+///
+/// These descriptors are shared between software and hardware and contain information
+/// related to frame reception.
+#[repr(C)]
+pub struct Descriptor {
+    /// The first word of the descriptor which is the byte address of the buffer.
+    pub word0: u32,
+    /// The second word of the descriptor.
+    pub word1: Word1,
+}
+
+#[bitbybit::bitenum(u3, exhaustive = true)]
+#[derive(Debug, PartialEq, Eq)]
+pub enum TransmitChecksumGenerationStatus {
+    NoError = 0b000,
+    VlanError = 0b001,
+    SnapError = 0b010,
+    IpError = 0b011,
+    NotVlanOrSnapOrIp = 0b100,
+    NonSupportedPacketFragmentation = 0b101,
+    PacketNotTcpUdp = 0b110,
+    PrematureEndOfFrame = 0b111,
+}
+
+#[bitbybit::bitfield(u32)]
+#[derive(Debug, PartialEq, Eq)]
+pub struct Word1 {
+    #[bit(31, rw)]
+    ownership: Ownership,
+    #[bit(30, rw)]
+    wrap: bool,
+    #[bit(29, rw)]
+    retry_limit_exceeded: bool,
+    #[bit(27, rw)]
+    transmit_frame_corruption_ahb_error: bool,
+    #[bit(26, rw)]
+    late_collision: bool,
+    #[bits(20..=22, rw)]
+    checksum_status: TransmitChecksumGenerationStatus,
+    #[bit(16, rw)]
+    no_crc_generation: bool,
+    #[bit(15, rw)]
+    last_buffer: bool,
+    #[bits(0..=13, rw)]
+    tx_len: u14,
+}