major restructuring, prepare for smp

code/public/ntlite/ddi/net_device.h

@@ -0,0 +1,57 @@
+#pragma once
+// net_device.h - kernel network-device registry.
+//
+// NIC drivers register NET_DEVICE objects here and feed complete Ethernet
+// frames into NetReceiveFrame(). Protocol ownership belongs to whichever
+// network stack driver registered through net_stack.h.
+
+#include <stdint.h>
+#include <stddef.h>
+#include <ntlite/status.h>
+
+#define NET_DEVICE_NAME_MAX          16u
+#define NET_HWADDR_MAX               16u
+#define NET_MTU_ETHERNET             1500u
+#define NET_ETHERNET_ADDRESS_LENGTH  6u
+#define NET_ETHERNET_HEADER_LENGTH   14u
+#define NET_ETHERNET_MIN_FRAME       60u
+#define NET_ETHERNET_MAX_FRAME       (NET_ETHERNET_HEADER_LENGTH + NET_MTU_ETHERNET)
+
+struct NET_DEVICE;
+typedef struct NET_DEVICE NET_DEVICE;
+
+typedef KSTATUS (*NET_SEND_FRAME)(NET_DEVICE* device,
+                                  const void* frame,
+                                  size_t length);
+
+typedef struct NET_DEVICE_STATS {
+    uint64_t TxPackets;
+    uint64_t TxBytes;
+    uint64_t TxErrors;
+    uint64_t RxPackets;
+    uint64_t RxBytes;
+    uint64_t RxDrops;
+} NET_DEVICE_STATS;
+
+struct NET_DEVICE {
+    char      Name[NET_DEVICE_NAME_MAX];
+    uint32_t  Index;
+    uint32_t  Mtu;
+    uint8_t   HardwareAddressLength;
+    uint8_t   HardwareAddress[NET_HWADDR_MAX];
+    void*     DriverContext;
+    NET_SEND_FRAME SendFrame;
+    NET_DEVICE_STATS Stats;
+};
+
+__declspec(dllexport) KSTATUS NetRegisterDevice(NET_DEVICE* device);
+__declspec(dllexport) uint32_t NetGetDeviceCount(void);
+__declspec(dllexport) NET_DEVICE* NetGetDevice(uint32_t index);
+__declspec(dllexport) KSTATUS NetGetDeviceStats(uint32_t index,
+                                                NET_DEVICE_STATS* stats);
+__declspec(dllexport) KSTATUS NetSendFrame(uint32_t index,
+                                           const void* frame,
+                                           size_t length);
+__declspec(dllexport) void NetReceiveFrame(NET_DEVICE* device,
+                                           const void* frame,
+                                           size_t length);