Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Copyright (c) 2013, Microsoft Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/hyperv.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/serio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * Current version 1.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define SYNTH_KBD_VERSION_MAJOR 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define SYNTH_KBD_VERSION_MINOR	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define SYNTH_KBD_VERSION		(SYNTH_KBD_VERSION_MINOR | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 					 (SYNTH_KBD_VERSION_MAJOR << 16))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * Message types in the synthetic input protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) enum synth_kbd_msg_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	SYNTH_KBD_PROTOCOL_REQUEST = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	SYNTH_KBD_PROTOCOL_RESPONSE = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	SYNTH_KBD_EVENT = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	SYNTH_KBD_LED_INDICATORS = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * Basic message structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) struct synth_kbd_msg_hdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	__le32 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) struct synth_kbd_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct synth_kbd_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	char data[]; /* Enclosed message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) union synth_kbd_version {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	__le32 version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  * Protocol messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) struct synth_kbd_protocol_request {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct synth_kbd_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	union synth_kbd_version version_requested;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define PROTOCOL_ACCEPTED	BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) struct synth_kbd_protocol_response {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct synth_kbd_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	__le32 proto_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #define IS_UNICODE	BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define IS_BREAK	BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #define IS_E0		BIT(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) #define IS_E1		BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) struct synth_kbd_keystroke {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct synth_kbd_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	__le16 make_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	__le16 reserved0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	__le32 info; /* Additional information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #define HK_MAXIMUM_MESSAGE_SIZE 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) #define KBD_VSC_SEND_RING_BUFFER_SIZE	VMBUS_RING_SIZE(36 * 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #define KBD_VSC_RECV_RING_BUFFER_SIZE	VMBUS_RING_SIZE(36 * 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define XTKBD_EMUL0     0xe0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #define XTKBD_EMUL1     0xe1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #define XTKBD_RELEASE   0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  * Represents a keyboard device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) struct hv_kbd_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct hv_device *hv_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct serio *hv_serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct synth_kbd_protocol_request protocol_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	struct synth_kbd_protocol_response protocol_resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	/* Synchronize the request/response if needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct completion wait_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	spinlock_t lock; /* protects 'started' field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	bool started;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void hv_kbd_on_receive(struct hv_device *hv_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 			      struct synth_kbd_msg *msg, u32 msg_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct synth_kbd_keystroke *ks_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	u32 msg_type = __le32_to_cpu(msg->header.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	u32 info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	u16 scan_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	switch (msg_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	case SYNTH_KBD_PROTOCOL_RESPONSE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		 * Validate the information provided by the host.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		 * If the host is giving us a bogus packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		 * drop the packet (hoping the problem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		 * goes away).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		if (msg_length < sizeof(struct synth_kbd_protocol_response)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			dev_err(&hv_dev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 				"Illegal protocol response packet (len: %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 				msg_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		memcpy(&kbd_dev->protocol_resp, msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			sizeof(struct synth_kbd_protocol_response));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		complete(&kbd_dev->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	case SYNTH_KBD_EVENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		 * Validate the information provided by the host.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		 * If the host is giving us a bogus packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		 * drop the packet (hoping the problem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		 * goes away).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		if (msg_length < sizeof(struct  synth_kbd_keystroke)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			dev_err(&hv_dev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				"Illegal keyboard event packet (len: %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 				msg_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		ks_msg = (struct synth_kbd_keystroke *)msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		info = __le32_to_cpu(ks_msg->info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		 * Inject the information through the serio interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		spin_lock_irqsave(&kbd_dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		if (kbd_dev->started) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			if (info & IS_E0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 				serio_interrupt(kbd_dev->hv_serio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 						XTKBD_EMUL0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			if (info & IS_E1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				serio_interrupt(kbd_dev->hv_serio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 						XTKBD_EMUL1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			scan_code = __le16_to_cpu(ks_msg->make_code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			if (info & IS_BREAK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 				scan_code |= XTKBD_RELEASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			serio_interrupt(kbd_dev->hv_serio, scan_code, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		spin_unlock_irqrestore(&kbd_dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		 * Only trigger a wakeup on key down, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		 * "echo freeze > /sys/power/state" can't really enter the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		 * state because the Enter-UP can trigger a wakeup at once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		if (!(info & IS_BREAK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			pm_wakeup_hard_event(&hv_dev->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		dev_err(&hv_dev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			"unhandled message type %d\n", msg_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static void hv_kbd_handle_received_packet(struct hv_device *hv_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 					  struct vmpacket_descriptor *desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 					  u32 bytes_recvd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 					  u64 req_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct synth_kbd_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	u32 msg_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	switch (desc->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	case VM_PKT_COMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	case VM_PKT_DATA_INBAND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		 * We have a packet that has "inband" data. The API used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		 * for retrieving the packet guarantees that the complete
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		 * packet is read. So, minimally, we should be able to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		 * parse the payload header safely (assuming that the host
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		 * can be trusted.  Trusting the host seems to be a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		 * reasonable assumption because in a virtualized
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		 * environment there is not whole lot you can do if you
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		 * don't trust the host.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		 * Nonetheless, let us validate if the host can be trusted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		 * (in a trivial way).  The interesting aspect of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		 * validation is how do you recover if we discover that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		 * host is not to be trusted? Simply dropping the packet, I
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		 * don't think is an appropriate recovery.  In the interest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		 * of failing fast, it may be better to crash the guest.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		 * For now, I will just drop the packet!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		msg_sz = bytes_recvd - (desc->offset8 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		if (msg_sz <= sizeof(struct synth_kbd_msg_hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			 * Drop the packet and hope
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			 * the problem magically goes away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			dev_err(&hv_dev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 				"Illegal packet (type: %d, tid: %llx, size: %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 				desc->type, req_id, msg_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		msg = (void *)desc + (desc->offset8 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		hv_kbd_on_receive(hv_dev, msg, msg_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		dev_err(&hv_dev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			"unhandled packet type %d, tid %llx len %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			desc->type, req_id, bytes_recvd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static void hv_kbd_on_channel_callback(void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	struct vmpacket_descriptor *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	struct hv_device *hv_dev = context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	u32 bytes_recvd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	u64 req_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	foreach_vmbus_pkt(desc, hv_dev->channel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		bytes_recvd = desc->len8 * 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		req_id = desc->trans_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		hv_kbd_handle_received_packet(hv_dev, desc, bytes_recvd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 					      req_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int hv_kbd_connect_to_vsp(struct hv_device *hv_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct synth_kbd_protocol_request *request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct synth_kbd_protocol_response *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	u32 proto_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	reinit_completion(&kbd_dev->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	request = &kbd_dev->protocol_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	memset(request, 0, sizeof(struct synth_kbd_protocol_request));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	request->header.type = __cpu_to_le32(SYNTH_KBD_PROTOCOL_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	request->version_requested.version = __cpu_to_le32(SYNTH_KBD_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	error = vmbus_sendpacket(hv_dev->channel, request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 				 sizeof(struct synth_kbd_protocol_request),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 				 (unsigned long)request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 				 VM_PKT_DATA_INBAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 				 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	if (!wait_for_completion_timeout(&kbd_dev->wait_event, 10 * HZ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		return -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	response = &kbd_dev->protocol_resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	proto_status = __le32_to_cpu(response->proto_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (!(proto_status & PROTOCOL_ACCEPTED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		dev_err(&hv_dev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			"synth_kbd protocol request failed (version %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		        SYNTH_KBD_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static int hv_kbd_start(struct serio *serio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	struct hv_kbd_dev *kbd_dev = serio->port_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	spin_lock_irqsave(&kbd_dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	kbd_dev->started = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	spin_unlock_irqrestore(&kbd_dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static void hv_kbd_stop(struct serio *serio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	struct hv_kbd_dev *kbd_dev = serio->port_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	spin_lock_irqsave(&kbd_dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	kbd_dev->started = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	spin_unlock_irqrestore(&kbd_dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int hv_kbd_probe(struct hv_device *hv_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			const struct hv_vmbus_device_id *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	struct hv_kbd_dev *kbd_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	struct serio *hv_serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	kbd_dev = kzalloc(sizeof(struct hv_kbd_dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	hv_serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (!kbd_dev || !hv_serio) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		goto err_free_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	kbd_dev->hv_dev = hv_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	kbd_dev->hv_serio = hv_serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	spin_lock_init(&kbd_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	init_completion(&kbd_dev->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	hv_set_drvdata(hv_dev, kbd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	hv_serio->dev.parent  = &hv_dev->device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	hv_serio->id.type = SERIO_8042_XL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	hv_serio->port_data = kbd_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	strlcpy(hv_serio->name, dev_name(&hv_dev->device),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		sizeof(hv_serio->name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	strlcpy(hv_serio->phys, dev_name(&hv_dev->device),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		sizeof(hv_serio->phys));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	hv_serio->start = hv_kbd_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	hv_serio->stop = hv_kbd_stop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	error = vmbus_open(hv_dev->channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 			   KBD_VSC_SEND_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 			   KBD_VSC_RECV_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 			   NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 			   hv_kbd_on_channel_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 			   hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		goto err_free_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	error = hv_kbd_connect_to_vsp(hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		goto err_close_vmbus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	serio_register_port(kbd_dev->hv_serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	device_init_wakeup(&hv_dev->device, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) err_close_vmbus:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	vmbus_close(hv_dev->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) err_free_mem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	kfree(hv_serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	kfree(kbd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) static int hv_kbd_remove(struct hv_device *hv_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	serio_unregister_port(kbd_dev->hv_serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	vmbus_close(hv_dev->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	kfree(kbd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	hv_set_drvdata(hv_dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static int hv_kbd_suspend(struct hv_device *hv_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	vmbus_close(hv_dev->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static int hv_kbd_resume(struct hv_device *hv_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	ret = vmbus_open(hv_dev->channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 			 KBD_VSC_SEND_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 			 KBD_VSC_RECV_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 			 NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 			 hv_kbd_on_channel_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 			 hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		ret = hv_kbd_connect_to_vsp(hv_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static const struct hv_vmbus_device_id id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	/* Keyboard guid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	{ HV_KBD_GUID, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) MODULE_DEVICE_TABLE(vmbus, id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) static struct  hv_driver hv_kbd_drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	.name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	.id_table = id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	.probe = hv_kbd_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	.remove = hv_kbd_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	.suspend = hv_kbd_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	.resume = hv_kbd_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) static int __init hv_kbd_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	return vmbus_driver_register(&hv_kbd_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) static void __exit hv_kbd_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	vmbus_driver_unregister(&hv_kbd_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Keyboard Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) module_init(hv_kbd_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) module_exit(hv_kbd_exit);