PCI driver WIP

drivers/pcid/src/pci/func.rs

@@ -0,0 +1,30 @@
+use std::ops::DerefMut;
+
+use super::{PciDev, PciHeader};
+
+pub struct PciFunc<'pci> {
+    pub dev: &'pci PciDev<'pci>,
+    pub num: u8
+}
+
+impl<'pci> PciFunc<'pci> {
+    pub fn header(&self) -> Option<PciHeader> {
+        if unsafe { self.read(0) } != 0xFFFFFFFF {
+            let mut header = PciHeader::default();
+            {
+                let dwords = header.deref_mut();
+                dwords.iter_mut().fold(0usize, |offset, dword| {
+                    *dword = unsafe { self.read(offset as u8) };
+                    offset + 4
+                });
+            }
+            Some(header)
+        } else {
+            None
+        }
+    }
+
+    pub unsafe fn read(&self, offset: u8) -> u32 {
+        self.dev.read(self.num, offset)
+    }
+}