From 1c6c922b4586517a2c616fe637bf0da75a24bc59 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sun, 22 Oct 2023 21:30:36 -0400
Subject: [PATCH] Add Pci.Type struct

---
 src/hulk/pci.d | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/hulk/pci.d b/src/hulk/pci.d
index 255220c..2c7cb14 100644
--- a/src/hulk/pci.d
+++ b/src/hulk/pci.d
@@ -1,3 +1,6 @@
+/**
+ * PCI (Peripheral Component Interconnect) functionality.
+ */
 module hulk.pci;
 
 import hulk.cpu;
@@ -20,6 +23,9 @@ struct Pci
 
     enum MAX_FUNCTIONS_PER_DEVICE = 8;
 
+    /**
+     * PCI device address (bus number, device number, function number).
+     */
     struct Address
     {
         /** Bus number (0-255). */
@@ -32,10 +38,29 @@ struct Pci
         ubyte function_nr;
     }
 
+    /**
+     * PCI device type (class ID, subclass ID, interface ID).
+     */
+    struct Type
+    {
+        /** Class ID. */
+        ubyte class_id;
+
+        /** Subclass ID. */
+        ubyte subclass_id;
+
+        /** Interface ID. */
+        ubyte interface_id;
+    }
+
+    /**
+     * PCI device object.
+     */
     static struct Device
     {
         Configuration * config;
         Address address;
+        Type type;
         bool multifunction;
         Range[6] memory_ranges;
 
@@ -43,9 +68,12 @@ struct Pci
         {
             this.config = config;
             this.address = address;
+            type.class_id = config.class_id;
+            type.subclass_id = config.subclass_id;
+            type.interface_id = config.interface_id;
             Klog.writefln("Found PCI device %04x:%04x (%02x:%02x:%02x) at %02u:%02u.%u",
                     config.vendor_id, config.device_id,
-                    config.class_id, config.subclass_id, config.interface_id,
+                    type.class_id, type.subclass_id, type.interface_id,
                     address.bus_nr, address.device_nr, address.function_nr);
             multifunction = (address.function_nr == 0u) && ((config.header_type & 0x80u) != 0u);
             ubyte header_type = config.header_type & 0x7Fu;