Adapt A314eth.device to PiSCSI device driver framework

Driver seemingly works, NAT/ethernet.py doesn't?

a314/software-amiga/ethernet_pistorm/build.sh

@@ -0,0 +1 @@
+m68k-amigaos-gcc device-2.c -O2 -o a314eth.device -m68000 -Wall -Wextra -Wno-unused-parameter -fomit-frame-pointer -nostartfiles -lm -ldebug

a314/software-amiga/ethernet_pistorm/device-2.c

@@ -0,0 +1,845 @@
+/*
+ * Copyright (c) 2020-2021 Niklas Ekström
+ *
+ * Thanks to Christian Vogelgsang and Mike Sterling for inspiration gained from their SANA-II drivers:
+ * - https://github.com/cnvogelg/plipbox
+ * - https://github.com/mikestir/k1208-drivers
+ */
+
+#include <exec/resident.h>
+#include <exec/errors.h>
+#include <exec/memory.h>
+#include <exec/lists.h>
+#include <exec/alerts.h>
+#include <exec/devices.h>
+#include <exec/types.h>
+#include <exec/tasks.h>
+#include <exec/io.h>
+#include <exec/execbase.h>
+#include <exec/ports.h>
+
+#include <libraries/expansion.h>
+#include <libraries/dos.h>
+
+#include <devices/trackdisk.h>
+#include <devices/timer.h>
+#include <devices/scsidisk.h>
+
+#include <dos/filehandler.h>
+
+#include <proto/disk.h>
+#include <proto/expansion.h>
+#include <proto/exec.h>
+#include <proto/dos.h>
+
+#include <string.h>
+
+#include <clib/alib_protos.h>
+
+#include "../../a314device/a314.h"
+#include "../../a314device/proto_a314.h"
+#include "sana2.h"
+
+#include <stdint.h>
+
+// Defines.
+
+#define kprintf(...)
+
+#define STR(s) #s
+#define XSTR(s) STR(s)
+
+#define DEVICE_NAME "a314eth.device"
+#define DEVICE_DATE "(19 May 2021)"
+#define SERVICE_NAME "ethernet"
+#define DEVICE_ID_STRING "A314Eth " XSTR(DEVICE_VERSION) "." XSTR(DEVICE_REVISION) " " DEVICE_DATE
+#define DEVICE_VERSION 42
+#define DEVICE_REVISION 2
+#define DEVICE_PRIORITY 0
+
+
+#define DEVICE_NAME		"a314eth.device"
+#define SERVICE_NAME		"ethernet"
+
+#define TASK_PRIO		10
+
+#define MACADDR_SIZE		6
+#define NIC_BPS			10000000
+
+#define ETH_MTU			1500
+#define RAW_MTU			1518
+
+#define READ_FRAME_REQ		1
+#define WRITE_FRAME_REQ		2
+#define READ_FRAME_RES		3
+#define WRITE_FRAME_RES		4
+
+#define ET_RBUF_CNT		2
+#define ET_WBUF_CNT		2
+#define ET_BUF_CNT		(ET_RBUF_CNT + ET_WBUF_CNT)
+
+int __attribute__((no_reorder)) _start()
+{
+    return -1;
+}
+
+asm("romtag:                                \n"
+    "       dc.w    "XSTR(RTC_MATCHWORD)"   \n"
+    "       dc.l    romtag                  \n"
+    "       dc.l    endcode                 \n"
+    "       dc.b    "XSTR(RTF_AUTOINIT)"    \n"
+    "       dc.b    "XSTR(DEVICE_VERSION)"  \n"
+    "       dc.b    "XSTR(NT_DEVICE)"       \n"
+    "       dc.b    "XSTR(DEVICE_PRIORITY)" \n"
+    "       dc.l    _device_name            \n"
+    "       dc.l    _device_id_string       \n"
+    "       dc.l    _auto_init_tables       \n"
+    "endcode:                               \n"
+	".align 4\n"
+	"	dc.l	16\n"
+	"_device_process_seglist:\n"
+	"	dc.l	0\n"
+	"	jmp	_device_process_run\n");
+
+char device_name[] = DEVICE_NAME;
+char device_id_string[] = DEVICE_ID_STRING;
+
+// Typedefs.
+
+typedef BOOL (*buf_copy_func_t)(void *dst asm("a0"), void *src asm("a1"), LONG size asm("d0"));
+
+// Structs.
+
+#pragma pack(push, 1)
+struct EthHdr
+{
+	unsigned char eh_Dst[MACADDR_SIZE];
+	unsigned char eh_Src[MACADDR_SIZE];
+	unsigned short eh_Type;
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct ServiceMsg
+{
+	ULONG sm_Address;
+	UWORD sm_Length;
+	UWORD sm_Kind;
+};
+#pragma pack(pop)
+
+struct BufDesc
+{
+	struct MinNode bd_Node;
+	void *bd_Buffer;
+	int bd_Length;
+};
+
+// Constants.
+
+static const char service_name[] = SERVICE_NAME;
+static const char a314_device_name[] = A314_NAME;
+
+static const unsigned char macaddr[MACADDR_SIZE] = { 0x40, 0x61, 0x33, 0x31, 0x34, 0x65 };
+
+// Global variables.
+
+BPTR saved_seg_list;
+struct ExecBase *SysBase;
+struct DosLibrary *DOSBase;
+struct Library *A314Base;
+
+buf_copy_func_t copyfrom;
+buf_copy_func_t copyto;
+
+volatile struct List ut_rbuf_list;
+volatile struct List ut_wbuf_list;
+
+struct BufDesc et_bufs[ET_BUF_CNT];
+
+struct List et_rbuf_free_list;
+struct List et_rbuf_pending_list;
+struct List et_rbuf_has_data_list;
+
+struct List et_wbuf_free_list;
+struct List et_wbuf_pending_list;
+
+LONG a314_socket;
+short last_req_kind;
+
+struct MsgPort a314_mp;
+
+struct A314_IORequest read_ior;
+struct A314_IORequest write_ior;
+struct A314_IORequest reset_ior;
+
+BOOL pending_a314_read;
+BOOL pending_a314_write;
+BOOL pending_a314_reset;
+
+struct ServiceMsg a314_read_buf;
+struct ServiceMsg a314_write_buf;
+
+volatile ULONG sana2_sigmask;
+volatile ULONG shutdown_sigmask;
+
+volatile struct Task *init_task;
+
+struct Process *device_process;
+volatile int device_start_error;
+void device_process_run();
+
+// External declarations.
+
+extern void device_process_seglist();
+
+// Procedures.
+
+static struct Library __attribute__((used)) *init_device(uint8_t *seg_list asm("a0"), struct Library *dev asm("d0"))
+{
+	saved_seg_list = (BPTR)seg_list;
+
+	dev->lib_Node.ln_Type = NT_DEVICE;
+	dev->lib_Node.ln_Name = (char *)device_name;
+	dev->lib_Flags = LIBF_SUMUSED | LIBF_CHANGED;
+	dev->lib_Version = 1;
+	dev->lib_Revision = 0;
+	dev->lib_IdString = (APTR)device_id_string;
+
+	SysBase = *(struct ExecBase **)4;
+	DOSBase = (struct DosLibrary *)OpenLibrary((STRPTR)DOSNAME, 0);
+
+	return dev;
+}
+
+static uint8_t* __attribute__((used)) expunge(struct Library *dev asm("a6"))
+{
+	if (dev->lib_OpenCnt)
+	{
+		dev->lib_Flags |= LIBF_DELEXP;
+		return 0;
+	}
+
+	// Shady way of waiting for device process to terminate before unloading.
+	Delay(10);
+
+	CloseLibrary((struct Library *)DOSBase);
+
+	Remove(&dev->lib_Node);
+	FreeMem((char *)dev - dev->lib_NegSize, dev->lib_NegSize + dev->lib_PosSize);
+	return (uint8_t *)saved_seg_list;
+}
+
+static void send_a314_cmd(struct A314_IORequest *ior, UWORD cmd, char *buffer, int length)
+{
+	ior->a314_Request.io_Command = cmd;
+	ior->a314_Request.io_Error = 0;
+	ior->a314_Socket = a314_socket;
+	ior->a314_Buffer = (STRPTR)buffer;
+	ior->a314_Length = length;
+	SendIO((struct IORequest *)ior);
+}
+
+static void do_a314_cmd(struct A314_IORequest *ior, UWORD cmd, char *buffer, int length)
+{
+	ior->a314_Request.io_Command = cmd;
+	ior->a314_Request.io_Error = 0;
+	ior->a314_Socket = a314_socket;
+	ior->a314_Buffer = (STRPTR)buffer;
+	ior->a314_Length = length;
+	DoIO((struct IORequest *)ior);
+}
+
+static void copy_from_bd_and_reply(struct IOSana2Req *ios2, struct BufDesc *bd)
+{
+	struct EthHdr *eh = bd->bd_Buffer;
+
+	if (ios2->ios2_Req.io_Flags & SANA2IOF_RAW)
+	{
+		ios2->ios2_DataLength = bd->bd_Length;
+		copyto(ios2->ios2_Data, bd->bd_Buffer, ios2->ios2_DataLength);
+		ios2->ios2_Req.io_Flags = SANA2IOF_RAW;
+	}
+	else
+	{
+		ios2->ios2_DataLength = bd->bd_Length - sizeof(struct EthHdr);
+		copyto(ios2->ios2_Data, &eh[1], ios2->ios2_DataLength);
+		ios2->ios2_Req.io_Flags = 0;
+	}
+
+	memcpy(ios2->ios2_SrcAddr, eh->eh_Src, MACADDR_SIZE);
+	memcpy(ios2->ios2_DstAddr, eh->eh_Dst, MACADDR_SIZE);
+
+	BOOL bcast = TRUE;
+	for (int i = 0; i < MACADDR_SIZE; i++)
+	{
+		if (eh->eh_Dst[i] != 0xff)
+		{
+			bcast = FALSE;
+			break;
+		}
+	}
+
+	if (bcast)
+		ios2->ios2_Req.io_Flags |= SANA2IOF_BCAST;
+
+	ios2->ios2_PacketType = eh->eh_Type;
+
+	ios2->ios2_Req.io_Error = 0;
+	ReplyMsg(&ios2->ios2_Req.io_Message);
+}
+
+static void copy_to_bd_and_reply(struct BufDesc *bd, struct IOSana2Req *ios2)
+{
+	struct EthHdr *eh = bd->bd_Buffer;
+
+	if (ios2->ios2_Req.io_Flags & SANA2IOF_RAW)
+	{
+		copyfrom(bd->bd_Buffer, ios2->ios2_Data, ios2->ios2_DataLength);
+		bd->bd_Length = ios2->ios2_DataLength;
+	}
+	else
+	{
+		eh->eh_Type = ios2->ios2_PacketType;
+		memcpy(eh->eh_Src, macaddr, sizeof(macaddr));
+		memcpy(eh->eh_Dst, ios2->ios2_DstAddr, MACADDR_SIZE);
+		copyfrom(&eh[1], ios2->ios2_Data, ios2->ios2_DataLength);
+		bd->bd_Length = ios2->ios2_DataLength + sizeof(struct EthHdr);
+	}
+
+	ios2->ios2_Req.io_Error = 0;
+	ReplyMsg(&ios2->ios2_Req.io_Message);
+}
+
+static void handle_a314_reply(struct A314_IORequest *ior)
+{
+	if (ior == &write_ior)
+	{
+		pending_a314_write = FALSE;
+
+		if (ior->a314_Request.io_Error == A314_WRITE_OK)
+		{
+			// Start new write later.
+		}
+		else // A314_WRITE_RESET
+		{
+			// TODO: Handle. What if pi-side is shutting down.
+		}
+	}
+	else if (ior == &read_ior)
+	{
+		pending_a314_read = FALSE;
+
+		if (ior->a314_Request.io_Error == A314_READ_OK)
+		{
+			if (a314_read_buf.sm_Kind == WRITE_FRAME_RES)
+			{
+				struct BufDesc *bd = (struct BufDesc *)RemHead(&et_wbuf_pending_list);
+				AddTail(&et_wbuf_free_list, (struct Node *)bd);
+			}
+			else // READ_FRAME_RES
+			{
+				struct BufDesc *bd = (struct BufDesc *)RemHead(&et_rbuf_pending_list);
+				bd->bd_Length = a314_read_buf.sm_Length;
+				AddTail(&et_rbuf_has_data_list, (struct Node *)bd);
+			}
+
+			send_a314_cmd(&read_ior, A314_READ, (void *)&a314_read_buf, sizeof(a314_read_buf));
+			pending_a314_read = TRUE;
+		}
+		else // A314_READ_RESET
+		{
+			// TODO: Handle. What if pi-side is shutting down.
+		}
+	}
+	else if (ior == &reset_ior)
+	{
+		pending_a314_reset = FALSE;
+	}
+}
+
+static struct IOSana2Req *remove_matching_rbuf(ULONG type)
+{
+	struct Node *node = ut_rbuf_list.lh_Head;
+	while (node->ln_Succ)
+	{
+		struct IOSana2Req *ios2 = (struct IOSana2Req *)node;
+		if (ios2->ios2_PacketType == type)
+		{
+			Remove(node);
+			return ios2;
+		}
+		node = node->ln_Succ;
+	}
+	return NULL;
+}
+
+static void complete_read_reqs()
+{
+	struct Node *node = et_rbuf_has_data_list.lh_Head;
+	if (!node->ln_Succ)
+		return;
+
+	Forbid();
+	while (node->ln_Succ)
+	{
+		struct BufDesc *bd = (struct BufDesc *)node;
+		struct EthHdr *eh = (struct EthHdr *)bd->bd_Buffer;
+
+		node = node->ln_Succ;
+
+		struct IOSana2Req *ios2 = remove_matching_rbuf(eh->eh_Type);
+		if (ios2)
+		{
+			copy_from_bd_and_reply(ios2, bd);
+
+			Remove((struct Node *)bd);
+			AddTail(&et_rbuf_free_list, (struct Node *)bd);
+		}
+	}
+	Permit();
+}
+
+static void maybe_write_req()
+{
+	if (pending_a314_write)
+		return;
+
+	BOOL free_et_wbuf = et_wbuf_free_list.lh_Head->ln_Succ != NULL;
+	BOOL idle_et_rbuf = et_rbuf_free_list.lh_Head->ln_Succ != NULL;
+
+	Forbid();
+
+	BOOL waiting_ut_wbuf = ut_wbuf_list.lh_Head->ln_Succ != NULL;
+
+	BOOL want_wbuf = free_et_wbuf && waiting_ut_wbuf;
+	BOOL want_rbuf = idle_et_rbuf;
+
+	if (!want_rbuf && !want_wbuf)
+	{
+		Permit();
+		return;
+	}
+
+	short next_req_kind = 0;
+
+	if (last_req_kind == WRITE_FRAME_REQ)
+		next_req_kind = want_rbuf ? READ_FRAME_REQ : WRITE_FRAME_REQ;
+	else
+		next_req_kind = want_wbuf ? WRITE_FRAME_REQ : READ_FRAME_REQ;
+
+	struct IOSana2Req *ios2 = NULL;
+	if (next_req_kind == WRITE_FRAME_REQ)
+		ios2 = (struct IOSana2Req*)RemHead((struct List *)&ut_wbuf_list);
+
+	Permit();
+
+	struct BufDesc *bd;
+
+	if (next_req_kind == READ_FRAME_REQ)
+	{
+		bd = (struct BufDesc *)RemHead(&et_rbuf_free_list);
+		bd->bd_Length = RAW_MTU;
+		AddTail(&et_rbuf_pending_list, (struct Node *)&bd->bd_Node);
+	}
+	else // WRITE_FRAME_REQ
+	{
+		bd = (struct BufDesc *)RemHead(&et_wbuf_free_list);
+		copy_to_bd_and_reply(bd, ios2);
+		AddTail(&et_wbuf_pending_list, (struct Node *)bd);
+	}
+
+	a314_write_buf.sm_Address = TranslateAddressA314(bd->bd_Buffer);
+	a314_write_buf.sm_Length = bd->bd_Length;
+	a314_write_buf.sm_Kind = next_req_kind;
+
+	send_a314_cmd(&write_ior, A314_WRITE, (void *)&a314_write_buf, sizeof(a314_write_buf));
+	pending_a314_write = TRUE;
+
+	last_req_kind = next_req_kind;
+}
+
+void device_process_run()
+{
+	ULONG sana2_signal = AllocSignal(-1);
+	sana2_sigmask = 1UL << sana2_signal;
+
+	ULONG shutdown_signal = AllocSignal(-1);
+	shutdown_sigmask = 1UL << shutdown_signal;
+
+	a314_mp.mp_SigBit = AllocSignal(-1);
+	a314_mp.mp_SigTask = FindTask(NULL);
+
+	do_a314_cmd(&reset_ior, A314_CONNECT, (char *)service_name, strlen(service_name));
+	device_start_error = reset_ior.a314_Request.io_Error == A314_CONNECT_OK ? 0 : -1;
+
+	Signal((struct Task *)init_task, SIGF_SINGLE);
+
+	if (device_start_error)
+		return;
+
+	ULONG a314_sigmask = 1UL << a314_mp.mp_SigBit;
+
+	send_a314_cmd(&read_ior, A314_READ, (void *)&a314_read_buf, sizeof(a314_read_buf));
+	pending_a314_read = TRUE;
+
+	BOOL shutting_down = FALSE;
+
+	while (TRUE)
+	{
+		complete_read_reqs();
+		maybe_write_req();
+
+		if (shutting_down && !pending_a314_read && !pending_a314_write && !pending_a314_reset)
+			break;
+
+		ULONG sigs = Wait(a314_sigmask | sana2_sigmask | shutdown_sigmask);
+
+		if ((sigs & shutdown_sigmask) && !shutting_down)
+		{
+			send_a314_cmd(&reset_ior, A314_RESET, NULL, 0);
+			pending_a314_reset = TRUE;
+			shutting_down = TRUE;
+		}
+
+		if (sigs & a314_sigmask)
+		{
+			struct A314_IORequest *ior;
+			while ((ior = (struct A314_IORequest *)GetMsg(&a314_mp)))
+				handle_a314_reply(ior);
+		}
+	}
+
+	Signal((struct Task *)init_task, SIGF_SINGLE);
+}
+
+static struct TagItem *FindTagItem(Tag tagVal, struct TagItem *tagList)
+{
+	struct TagItem *ti = tagList;
+	while (ti && ti->ti_Tag != tagVal)
+	{
+		switch (ti->ti_Tag)
+		{
+		case TAG_DONE:
+			return NULL;
+		case TAG_MORE:
+			ti = (struct TagItem *)ti->ti_Data;
+			break;
+		case TAG_SKIP:
+			ti += ti->ti_Data + 1;
+			break;
+		case TAG_IGNORE:
+		default:
+			ti++;
+			break;
+		}
+	}
+	return ti;
+}
+
+static ULONG GetTagData(Tag tagVal, ULONG defaultData, struct TagItem *tagList)
+{
+	struct TagItem *ti = FindTagItem(tagVal, tagList);
+	return ti ? ti->ti_Data : defaultData;
+}
+
+static void __attribute__((used)) open(struct Library *dev asm("a6"), struct IOSana2Req *ios2 asm("a1"), uint32_t unitnum asm("d0"), uint32_t flags asm("d1"))
+{
+	kprintf("We opening this shit.\n");
+	ios2->ios2_Req.io_Error = IOERR_OPENFAIL;
+	ios2->ios2_Req.io_Message.mn_Node.ln_Type = NT_REPLYMSG;
+
+	if (unitnum != 0 || dev->lib_OpenCnt)
+		return;
+
+	dev->lib_OpenCnt++;
+
+	kprintf("Try the copyfrom crap.\n");
+	copyfrom = (buf_copy_func_t)GetTagData(S2_CopyFromBuff, 0, (struct TagItem *)ios2->ios2_BufferManagement);
+	copyto = (buf_copy_func_t)GetTagData(S2_CopyToBuff, 0, (struct TagItem *)ios2->ios2_BufferManagement);
+	ios2->ios2_BufferManagement = (void *)0xdeadbeefUL;
+
+	kprintf("Memsetting some shit.\n");
+	memset(&a314_mp, 0, sizeof(a314_mp));
+	a314_mp.mp_Node.ln_Pri = 0;
+	a314_mp.mp_Node.ln_Type = NT_MSGPORT;
+	a314_mp.mp_Node.ln_Name = (char *)device_name;
+	a314_mp.mp_Flags = PA_SIGNAL;
+	NewList(&a314_mp.mp_MsgList);
+
+	kprintf("Memsetting more shit.\n");
+	memset(&write_ior, 0, sizeof(write_ior));
+	write_ior.a314_Request.io_Message.mn_ReplyPort = &a314_mp;
+	write_ior.a314_Request.io_Message.mn_Length = sizeof(write_ior);
+	write_ior.a314_Request.io_Message.mn_Node.ln_Type = NT_REPLYMSG;
+
+	kprintf("Opendevice.\n");
+	A314Base = NULL;
+	if (OpenDevice((STRPTR)a314_device_name, 0, (struct IORequest *)&write_ior, 0))
+		goto error;
+
+	A314Base = &(write_ior.a314_Request.io_Device->dd_Library);
+
+	kprintf("Copy memory.\n");
+	memcpy(&read_ior, &write_ior, sizeof(read_ior));
+	memcpy(&reset_ior, &write_ior, sizeof(reset_ior));
+
+	kprintf("Making datestamps.\n");
+	struct DateStamp ds;
+	DateStamp(&ds);
+	a314_socket = (ds.ds_Minute * 60 * TICKS_PER_SECOND) + ds.ds_Tick;
+
+	last_req_kind = WRITE_FRAME_REQ;
+
+	kprintf("Making lists.\n");
+	NewList((struct List *)&ut_rbuf_list);
+	NewList((struct List *)&ut_wbuf_list);
+
+	NewList(&et_rbuf_free_list);
+	NewList(&et_rbuf_pending_list);
+	NewList(&et_rbuf_has_data_list);
+
+	NewList(&et_wbuf_free_list);
+	NewList(&et_wbuf_pending_list);
+
+	kprintf("Memzero buffers.\n");
+	for (int i = 0; i < ET_BUF_CNT; i++)
+		memset(&et_bufs[i], 0, sizeof(struct BufDesc));
+
+	kprintf("Add tails.\n");
+	for (int i = 0; i < ET_BUF_CNT; i++)
+	{
+		struct BufDesc *bd = &et_bufs[i];
+
+		bd->bd_Buffer = AllocMem(RAW_MTU, MEMF_FAST);
+		if (!bd->bd_Buffer)
+			goto error;
+
+		if (i < ET_RBUF_CNT)
+			AddTail(&et_rbuf_free_list, (struct Node*)&bd->bd_Node);
+		else
+			AddTail(&et_wbuf_free_list, (struct Node*)&bd->bd_Node);
+	}
+
+	kprintf("Find task.\n");
+	init_task = FindTask(NULL);
+
+	kprintf("Do msgport.\n");
+	struct MsgPort *device_mp = CreateProc((STRPTR)device_name, TASK_PRIO, ((ULONG)&device_process_seglist) >> 2, 2048);
+	if (!device_mp)
+		goto error;
+
+	kprintf("Process thing.\n");
+	device_process = (struct Process *)((char *)device_mp - sizeof(struct Task));
+
+	kprintf("Waitf.\n");
+	Wait(SIGF_SINGLE);
+	kprintf("Waitedf.\n");
+
+	if (device_start_error) {
+		kprintf("Device start error.\n");
+		goto error;
+	}
+
+	kprintf("Everything ok?\n");
+	ios2->ios2_Req.io_Error = 0;
+	return;
+
+error:
+	kprintf("Error small farts.\n");
+	for (int i = ET_BUF_CNT - 1; i >= 0; i--)
+		if (et_bufs[i].bd_Buffer)
+			FreeMem(et_bufs[i].bd_Buffer, RAW_MTU);
+
+	if (A314Base)
+	{
+		CloseDevice((struct IORequest *)&write_ior);
+		A314Base = NULL;
+	}
+
+	dev->lib_OpenCnt--;
+}
+
+static uint8_t* __attribute__((used)) close(struct Library *dev asm("a6"), struct IOSana2Req *ios2 asm("a1"))
+{
+	kprintf("Close.\n");
+	init_task = FindTask(NULL);
+	Signal(&device_process->pr_Task, shutdown_sigmask);
+	Wait(SIGF_SINGLE);
+
+	for (int i = ET_BUF_CNT - 1; i >= 0; i--)
+		FreeMem(et_bufs[i].bd_Buffer, RAW_MTU);
+
+	CloseDevice((struct IORequest *)&write_ior);
+	A314Base = NULL;
+
+	ios2->ios2_Req.io_Device = NULL;
+	ios2->ios2_Req.io_Unit = NULL;
+
+	dev->lib_OpenCnt--;
+
+	if (dev->lib_OpenCnt == 0 && (dev->lib_Flags & LIBF_DELEXP))
+		return expunge(dev);
+
+	return 0;
+}
+
+static void device_query(struct IOSana2Req *req)
+{
+	struct Sana2DeviceQuery *query;
+
+	query = req->ios2_StatData;
+	query->DevQueryFormat = 0;
+	query->DeviceLevel = 0;
+
+	if (query->SizeAvailable >= 18)
+		query->AddrFieldSize = MACADDR_SIZE * 8;
+
+	if (query->SizeAvailable >= 22)
+		query->MTU = ETH_MTU;
+
+	if (query->SizeAvailable >= 26)
+		query->BPS = NIC_BPS;
+
+	if (query->SizeAvailable >= 30)
+		query->HardwareType = S2WireType_Ethernet;
+
+	query->SizeSupplied = query->SizeAvailable < 30 ? query->SizeAvailable : 30;
+}
+
+static void __attribute__((used)) begin_io(struct Library *dev asm("a6"), struct IOSana2Req *ios2 asm("a1"))
+{
+	kprintf("BeginIO.\n");
+	ios2->ios2_Req.io_Error = S2ERR_NO_ERROR;
+	ios2->ios2_WireError = S2WERR_GENERIC_ERROR;
+
+	switch (ios2->ios2_Req.io_Command)
+	{
+	case CMD_READ:
+		if (!ios2->ios2_BufferManagement)
+		{
+			ios2->ios2_Req.io_Error = S2ERR_BAD_ARGUMENT;
+			ios2->ios2_WireError = S2WERR_BUFF_ERROR;
+			break;
+		}
+
+		Forbid();
+		AddTail((struct List *)&ut_rbuf_list, &ios2->ios2_Req.io_Message.mn_Node);
+		Permit();
+
+		ios2->ios2_Req.io_Flags &= ~SANA2IOF_QUICK;
+		ios2 = NULL;
+
+		Signal(&device_process->pr_Task, sana2_sigmask);
+		break;
+
+	case S2_BROADCAST:
+		memset(ios2->ios2_DstAddr, 0xff, MACADDR_SIZE);
+		/* Fall through */
+
+	case CMD_WRITE:
+		if (((ios2->ios2_Req.io_Flags & SANA2IOF_RAW) != 0 && ios2->ios2_DataLength > RAW_MTU) ||
+			((ios2->ios2_Req.io_Flags & SANA2IOF_RAW) == 0 && ios2->ios2_DataLength > ETH_MTU))
+		{
+			ios2->ios2_Req.io_Error = S2ERR_MTU_EXCEEDED;
+			break;
+		}
+
+		if (!ios2->ios2_BufferManagement)
+		{
+			ios2->ios2_Req.io_Error = S2ERR_BAD_ARGUMENT;
+			ios2->ios2_WireError = S2WERR_BUFF_ERROR;
+			break;
+		}
+
+		Forbid();
+		AddTail((struct List *)&ut_wbuf_list, &ios2->ios2_Req.io_Message.mn_Node);
+		Permit();
+
+		ios2->ios2_Req.io_Flags &= ~SANA2IOF_QUICK;
+		ios2 = NULL;
+
+		Signal(&device_process->pr_Task, sana2_sigmask);
+		break;
+
+	case S2_ONLINE:
+	case S2_OFFLINE:
+	case S2_CONFIGINTERFACE:
+		break;
+	case S2_GETSTATIONADDRESS:
+		memcpy(ios2->ios2_SrcAddr, macaddr, sizeof(macaddr));
+		memcpy(ios2->ios2_DstAddr, macaddr, sizeof(macaddr));
+		break;
+	case S2_DEVICEQUERY:
+		device_query(ios2);
+		break;
+
+	case S2_ONEVENT:
+	case S2_TRACKTYPE:
+	case S2_UNTRACKTYPE:
+	case S2_GETTYPESTATS:
+	case S2_READORPHAN:
+	case S2_GETGLOBALSTATS:
+	case S2_GETSPECIALSTATS:
+		break;
+
+	default:
+		ios2->ios2_Req.io_Error = IOERR_NOCMD;
+		ios2->ios2_WireError = S2WERR_GENERIC_ERROR;
+		break;
+	}
+
+	if (ios2)
+	{
+		if (ios2->ios2_Req.io_Flags & SANA2IOF_QUICK)
+			ios2->ios2_Req.io_Message.mn_Node.ln_Type = NT_MESSAGE;
+		else
+			ReplyMsg(&ios2->ios2_Req.io_Message);
+	}
+}
+
+static void remove_from_list(struct List *list, struct Node *node)
+{
+	for (struct Node *n = list->lh_Head; n->ln_Succ; n = n->ln_Succ)
+	{
+		if (n == node)
+		{
+			Remove(n);
+			return;
+		}
+	}
+}
+
+static uint32_t __attribute__((used)) abort_io(struct Library *dev asm("a6"), struct IOSana2Req *ios2 asm("a1"))
+{
+	kprintf("AbortIO.\n");
+	Forbid();
+	remove_from_list((struct List *)&ut_rbuf_list, &ios2->ios2_Req.io_Message.mn_Node);
+	remove_from_list((struct List *)&ut_wbuf_list, &ios2->ios2_Req.io_Message.mn_Node);
+	Permit();
+
+	ios2->ios2_Req.io_Error = IOERR_ABORTED;
+	ios2->ios2_WireError = 0;
+	ReplyMsg(&ios2->ios2_Req.io_Message);
+
+	return 0;
+}
+
+static ULONG device_vectors[] =
+{
+	(ULONG)open,
+	(ULONG)close,
+	(ULONG)expunge,
+	0,
+	(ULONG)begin_io,
+	(ULONG)abort_io,
+	-1,
+};
+
+ULONG auto_init_tables[] =
+{
+	sizeof(struct Library),
+	(ULONG)device_vectors,
+	0,
+	(ULONG)init_device,
+};