mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/drivers/input/serio/hyperv-keyboard.c
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..
@@ -1,14 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  Copyright (c) 2013, Microsoft Corporation.
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- *
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- *  This program is free software; you can redistribute it and/or modify it
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- *  under the terms and conditions of the GNU General Public License,
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- *  version 2, as published by the Free Software Foundation.
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- *
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- *  This program is distributed in the hope it will be useful, but WITHOUT
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- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- *  more details.
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4
  */
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5
 
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 #include <linux/init.h>
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@@ -83,8 +75,8 @@
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75
 
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 #define HK_MAXIMUM_MESSAGE_SIZE 256
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-#define KBD_VSC_SEND_RING_BUFFER_SIZE		(10 * PAGE_SIZE)
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-#define KBD_VSC_RECV_RING_BUFFER_SIZE		(10 * PAGE_SIZE)
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+#define KBD_VSC_SEND_RING_BUFFER_SIZE	VMBUS_RING_SIZE(36 * 1024)
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+#define KBD_VSC_RECV_RING_BUFFER_SIZE	VMBUS_RING_SIZE(36 * 1024)
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 #define XTKBD_EMUL0     0xe0
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 #define XTKBD_EMUL1     0xe1
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@@ -267,6 +259,8 @@
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 	u32 proto_status;
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 	int error;
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261
 
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+	reinit_completion(&kbd_dev->wait_event);
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+
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 	request = &kbd_dev->protocol_req;
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 	memset(request, 0, sizeof(struct synth_kbd_protocol_request));
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 	request->header.type = __cpu_to_le32(SYNTH_KBD_PROTOCOL_REQUEST);
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@@ -388,6 +382,29 @@
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 	return 0;
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 }
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+static int hv_kbd_suspend(struct hv_device *hv_dev)
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+{
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+	vmbus_close(hv_dev->channel);
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+
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+	return 0;
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+}
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+
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+static int hv_kbd_resume(struct hv_device *hv_dev)
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+{
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+	int ret;
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+
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+	ret = vmbus_open(hv_dev->channel,
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+			 KBD_VSC_SEND_RING_BUFFER_SIZE,
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+			 KBD_VSC_RECV_RING_BUFFER_SIZE,
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+			 NULL, 0,
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+			 hv_kbd_on_channel_callback,
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+			 hv_dev);
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+	if (ret == 0)
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+		ret = hv_kbd_connect_to_vsp(hv_dev);
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+
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+	return ret;
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+}
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+
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 static const struct hv_vmbus_device_id id_table[] = {
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 	/* Keyboard guid */
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 	{ HV_KBD_GUID, },
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@@ -401,6 +418,8 @@
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 	.id_table = id_table,
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 	.probe = hv_kbd_probe,
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 	.remove = hv_kbd_remove,
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+	.suspend = hv_kbd_suspend,
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+	.resume = hv_kbd_resume,
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 	.driver = {
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 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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 	},
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@@ -417,5 +436,7 @@
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 }
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 MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Keyboard Driver");
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+
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 module_init(hv_kbd_init);
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 module_exit(hv_kbd_exit);