From 44a8696dc51aa6d0cf6f5c13a0921dc0247a5119 Mon Sep 17 00:00:00 2001
From: X512 <danger_mail@list.ru>
Date: Wed, 26 May 2021 12:57:54 +0900
Subject: [PATCH] add VirtIO header

Change-Id: I938e80fe156a0a1d49e0eef330cbfc0cf22f0995
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4002
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
---
 headers/private/virtio/virtio_defs.h | 210 +++++++++++++++++++++++++++
 1 file changed, 210 insertions(+)
 create mode 100644 headers/private/virtio/virtio_defs.h

diff --git a/headers/private/virtio/virtio_defs.h b/headers/private/virtio/virtio_defs.h
new file mode 100644
index 0000000000..a88cf6984b
--- /dev/null
+++ b/headers/private/virtio/virtio_defs.h
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2021, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _VIRTIO_DEFS_H_
+#define _VIRTIO_DEFS_H_
+
+
+#include <SupportDefs.h>
+
+
+enum {
+	kVirtioRegsSize = 0x1000,
+	kVirtioSignature = 0x74726976,
+	kVirtioVendorId = 0x554d4551,
+};
+
+enum {
+	kVirtioDevNet     =  1,
+	kVirtioDevBlock   =  2,
+	kVirtioDevConsole =  3,
+	kVirtioDev9p      =  9,
+	kVirtioDevInput   = 18,
+};
+
+enum {
+	kVirtioConfigSAcknowledge = 1 << 0,
+	kVirtioConfigSDriver      = 1 << 1,
+	kVirtioConfigSDriverOk    = 1 << 2,
+	kVirtioConfigSFeaturesOk  = 1 << 3,
+};
+
+enum {
+	kVringDescFlagsNext     = 1 << 0,
+	kVringDescFlagsWrite    = 1 << 1,
+	kVringDescFlagsIndirect = 1 << 2,
+};
+
+struct VirtioRegs {
+	uint32 signature;
+	uint32 version;
+	uint32 deviceId;
+	uint32 vendorId;
+	uint32 deviceFeatures;
+	uint32 unknown1[3];
+	uint32 driverFeatures;
+	uint32 unknown2[1];
+	uint32 guestPageSize; /* version 1 only */
+	uint32 unknown3[1];
+	uint32 queueSel;
+	uint32 queueNumMax;
+	uint32 queueNum;
+	uint32 queueAlign;    /* version 1 only */
+	uint32 queuePfn;      /* version 1 only */
+	uint32 queueReady;
+	uint32 unknown4[2];
+	uint32 queueNotify;
+	uint32 unknown5[3];
+	uint32 interruptStatus;
+	uint32 interruptAck;
+	uint32 unknown6[2];
+	uint32 status;
+	uint32 unknown7[3];
+	uint32 queueDescLow;
+	uint32 queueDescHi;
+	uint32 unknown8[2];
+	uint32 queueAvailLow;
+	uint32 queueAvailHi;
+	uint32 unknown9[2];
+	uint32 queueUsedLow;
+	uint32 queueUsedHi;
+	uint32 unknown10[21];
+	uint32 configGeneration;
+	uint8 config[3840];
+};
+
+struct VirtioDesc {
+	uint64 addr;
+	uint32 len;
+	uint16 flags;
+	uint16 next;
+};
+
+// filled by driver
+struct VirtioAvail {
+	uint16 flags;
+	uint16 idx;
+	uint16 ring[0];
+};
+
+struct VirtioUsedItem
+{
+	uint32 id;
+	uint32 len;
+};
+
+// filled by device
+struct VirtioUsed {
+	uint16 flags;
+	uint16 idx;
+	VirtioUsedItem ring[0];
+};
+
+
+// Input
+
+// VirtioInputConfig::select
+enum {
+	kVirtioInputCfgUnset    = 0x00,
+	kVirtioInputCfgIdName   = 0x01,
+	kVirtioInputCfgIdSerial = 0x02,
+	kVirtioInputCfgIdDevids = 0x03,
+	kVirtioInputCfgPropBits = 0x10,
+	kVirtioInputCfgEvBits   = 0x11, // subsel: kVirtioInputEv*
+	kVirtioInputCfgAbsInfo  = 0x12, // subsel: kVirtioInputAbs*
+};
+
+enum {
+	kVirtioInputEvSyn = 0,
+	kVirtioInputEvKey = 1,
+	kVirtioInputEvRel = 2,
+	kVirtioInputEvAbs = 3,
+	kVirtioInputEvRep = 4,
+};
+
+enum {
+	kVirtioInputBtnLeft     = 0x110,
+	kVirtioInputBtnRight    = 0x111,
+	kVirtioInputBtnMiddle   = 0x112,
+	kVirtioInputBtnGearDown = 0x150,
+	kVirtioInputBtnGearUp   = 0x151,
+};
+
+enum {
+	kVirtioInputRelX     = 0,
+	kVirtioInputRelY     = 1,
+	kVirtioInputRelZ     = 2,
+	kVirtioInputRelWheel = 8,
+};
+
+enum {
+	kVirtioInputAbsX = 0,
+	kVirtioInputAbsY = 1,
+	kVirtioInputAbsZ = 2,
+};
+
+
+struct VirtioInputAbsinfo {
+	int32 min;
+	int32 max;
+	int32 fuzz;
+	int32 flat;
+	int32 res;
+};
+
+struct VirtioInputDevids {
+	uint16 bustype;
+	uint16 vendor;
+	uint16 product;
+	uint16 version;
+};
+
+struct VirtioInputConfig {
+	uint8 select; // in
+	uint8 subsel; // in
+	uint8 size;   // out, size of reply
+	uint8 reserved[5];
+	union {
+		char  string[128];
+		uint8 bitmap[128];
+		VirtioInputAbsinfo abs;
+		VirtioInputDevids ids;
+	};
+};
+
+struct VirtioInputPacket {
+	uint16 type;
+	uint16 code;
+	int32 value;
+};
+
+
+// Block
+
+enum {
+	kVirtioBlockTypeIn       = 0,
+	kVirtioBlockTypeOut      = 1,
+	kVirtioBlockTypeFlush    = 4,
+	kVirtioBlockTypeFlushOut = 5,
+};
+
+enum {
+	kVirtioBlockStatusOk          = 0,
+	kVirtioBlockStatusIoError     = 1,
+	kVirtioBlockStatusUnsupported = 2,
+};
+
+enum {
+	kVirtioBlockSectorSize = 512,
+};
+
+struct VirtioBlockRequest {
+	uint32 type;
+	uint32 ioprio;
+	uint64 sectorNum;
+};
+
+
+#endif	// _VIRTIO_DEFS_H_