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Diffstat (limited to 'drivers/staging/hv/hv_util.c')
-rw-r--r--drivers/staging/hv/hv_util.c306
1 files changed, 0 insertions, 306 deletions
diff --git a/drivers/staging/hv/hv_util.c b/drivers/staging/hv/hv_util.c
deleted file mode 100644
index c164b54b4cd7..000000000000
--- a/drivers/staging/hv/hv_util.c
+++ /dev/null
@@ -1,306 +0,0 @@
-/*
- * Copyright (c) 2010, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sysctl.h>
-#include <linux/reboot.h>
-#include <linux/dmi.h>
-#include <linux/pci.h>
-
-#include "hyperv.h"
-#include "hv_kvp.h"
-
-static u8 *shut_txf_buf;
-static u8 *time_txf_buf;
-static u8 *hbeat_txf_buf;
-
-static void shutdown_onchannelcallback(void *context)
-{
- struct vmbus_channel *channel = context;
- u32 recvlen;
- u64 requestid;
- u8 execute_shutdown = false;
-
- struct shutdown_msg_data *shutdown_msg;
-
- struct icmsg_hdr *icmsghdrp;
- struct icmsg_negotiate *negop = NULL;
-
- vmbus_recvpacket(channel, shut_txf_buf,
- PAGE_SIZE, &recvlen, &requestid);
-
- if (recvlen > 0) {
- icmsghdrp = (struct icmsg_hdr *)&shut_txf_buf[
- sizeof(struct vmbuspipe_hdr)];
-
- if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
- prep_negotiate_resp(icmsghdrp, negop, shut_txf_buf);
- } else {
- shutdown_msg =
- (struct shutdown_msg_data *)&shut_txf_buf[
- sizeof(struct vmbuspipe_hdr) +
- sizeof(struct icmsg_hdr)];
-
- switch (shutdown_msg->flags) {
- case 0:
- case 1:
- icmsghdrp->status = HV_S_OK;
- execute_shutdown = true;
-
- pr_info("Shutdown request received -"
- " graceful shutdown initiated\n");
- break;
- default:
- icmsghdrp->status = HV_E_FAIL;
- execute_shutdown = false;
-
- pr_info("Shutdown request received -"
- " Invalid request\n");
- break;
- }
- }
-
- icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
- | ICMSGHDRFLAG_RESPONSE;
-
- vmbus_sendpacket(channel, shut_txf_buf,
- recvlen, requestid,
- VM_PKT_DATA_INBAND, 0);
- }
-
- if (execute_shutdown == true)
- orderly_poweroff(false);
-}
-
-/*
- * Set guest time to host UTC time.
- */
-static inline void do_adj_guesttime(u64 hosttime)
-{
- s64 host_tns;
- struct timespec host_ts;
-
- host_tns = (hosttime - WLTIMEDELTA) * 100;
- host_ts = ns_to_timespec(host_tns);
-
- do_settimeofday(&host_ts);
-}
-
-/*
- * Synchronize time with host after reboot, restore, etc.
- *
- * ICTIMESYNCFLAG_SYNC flag bit indicates reboot, restore events of the VM.
- * After reboot the flag ICTIMESYNCFLAG_SYNC is included in the first time
- * message after the timesync channel is opened. Since the hv_utils module is
- * loaded after hv_vmbus, the first message is usually missed. The other
- * thing is, systime is automatically set to emulated hardware clock which may
- * not be UTC time or in the same time zone. So, to override these effects, we
- * use the first 50 time samples for initial system time setting.
- */
-static inline void adj_guesttime(u64 hosttime, u8 flags)
-{
- static s32 scnt = 50;
-
- if ((flags & ICTIMESYNCFLAG_SYNC) != 0) {
- do_adj_guesttime(hosttime);
- return;
- }
-
- if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) {
- scnt--;
- do_adj_guesttime(hosttime);
- }
-}
-
-/*
- * Time Sync Channel message handler.
- */
-static void timesync_onchannelcallback(void *context)
-{
- struct vmbus_channel *channel = context;
- u32 recvlen;
- u64 requestid;
- struct icmsg_hdr *icmsghdrp;
- struct ictimesync_data *timedatap;
-
- vmbus_recvpacket(channel, time_txf_buf,
- PAGE_SIZE, &recvlen, &requestid);
-
- if (recvlen > 0) {
- icmsghdrp = (struct icmsg_hdr *)&time_txf_buf[
- sizeof(struct vmbuspipe_hdr)];
-
- if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
- prep_negotiate_resp(icmsghdrp, NULL, time_txf_buf);
- } else {
- timedatap = (struct ictimesync_data *)&time_txf_buf[
- sizeof(struct vmbuspipe_hdr) +
- sizeof(struct icmsg_hdr)];
- adj_guesttime(timedatap->parenttime, timedatap->flags);
- }
-
- icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
- | ICMSGHDRFLAG_RESPONSE;
-
- vmbus_sendpacket(channel, time_txf_buf,
- recvlen, requestid,
- VM_PKT_DATA_INBAND, 0);
- }
-}
-
-/*
- * Heartbeat functionality.
- * Every two seconds, Hyper-V send us a heartbeat request message.
- * we respond to this message, and Hyper-V knows we are alive.
- */
-static void heartbeat_onchannelcallback(void *context)
-{
- struct vmbus_channel *channel = context;
- u32 recvlen;
- u64 requestid;
- struct icmsg_hdr *icmsghdrp;
- struct heartbeat_msg_data *heartbeat_msg;
-
- vmbus_recvpacket(channel, hbeat_txf_buf,
- PAGE_SIZE, &recvlen, &requestid);
-
- if (recvlen > 0) {
- icmsghdrp = (struct icmsg_hdr *)&hbeat_txf_buf[
- sizeof(struct vmbuspipe_hdr)];
-
- if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
- prep_negotiate_resp(icmsghdrp, NULL, hbeat_txf_buf);
- } else {
- heartbeat_msg =
- (struct heartbeat_msg_data *)&hbeat_txf_buf[
- sizeof(struct vmbuspipe_hdr) +
- sizeof(struct icmsg_hdr)];
-
- heartbeat_msg->seq_num += 1;
- }
-
- icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
- | ICMSGHDRFLAG_RESPONSE;
-
- vmbus_sendpacket(channel, hbeat_txf_buf,
- recvlen, requestid,
- VM_PKT_DATA_INBAND, 0);
- }
-}
-
-static const struct pci_device_id __initconst
-hv_utils_pci_table[] __maybe_unused = {
- { PCI_DEVICE(0x1414, 0x5353) }, /* Hyper-V emulated VGA controller */
- { 0 }
-};
-MODULE_DEVICE_TABLE(pci, hv_utils_pci_table);
-
-
-static const struct dmi_system_id __initconst
-hv_utils_dmi_table[] __maybe_unused = {
- {
- .ident = "Hyper-V",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
- DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
- },
- },
- { },
-};
-MODULE_DEVICE_TABLE(dmi, hv_utils_dmi_table);
-
-
-static int __init init_hyperv_utils(void)
-{
- pr_info("Registering HyperV Utility Driver\n");
-
- if (hv_kvp_init())
- return -ENODEV;
-
-
- if (!dmi_check_system(hv_utils_dmi_table))
- return -ENODEV;
-
- shut_txf_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- time_txf_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- hbeat_txf_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
-
- if (!shut_txf_buf || !time_txf_buf || !hbeat_txf_buf) {
- pr_info("Unable to allocate memory for receive buffer\n");
- kfree(shut_txf_buf);
- kfree(time_txf_buf);
- kfree(hbeat_txf_buf);
- return -ENOMEM;
- }
-
- hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback;
-
- hv_cb_utils[HV_TIMESYNC_MSG].callback = &timesync_onchannelcallback;
-
- hv_cb_utils[HV_HEARTBEAT_MSG].callback = &heartbeat_onchannelcallback;
-
- hv_cb_utils[HV_KVP_MSG].callback = &hv_kvp_onchannelcallback;
-
- return 0;
-}
-
-static void exit_hyperv_utils(void)
-{
- pr_info("De-Registered HyperV Utility Driver\n");
-
- if (hv_cb_utils[HV_SHUTDOWN_MSG].channel != NULL)
- hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback =
- &chn_cb_negotiate;
- hv_cb_utils[HV_SHUTDOWN_MSG].callback = NULL;
-
- if (hv_cb_utils[HV_TIMESYNC_MSG].channel != NULL)
- hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback =
- &chn_cb_negotiate;
- hv_cb_utils[HV_TIMESYNC_MSG].callback = NULL;
-
- if (hv_cb_utils[HV_HEARTBEAT_MSG].channel != NULL)
- hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback =
- &chn_cb_negotiate;
- hv_cb_utils[HV_HEARTBEAT_MSG].callback = NULL;
-
- if (hv_cb_utils[HV_KVP_MSG].channel != NULL)
- hv_cb_utils[HV_KVP_MSG].channel->onchannel_callback =
- &chn_cb_negotiate;
- hv_cb_utils[HV_KVP_MSG].callback = NULL;
-
- hv_kvp_deinit();
-
- kfree(shut_txf_buf);
- kfree(time_txf_buf);
- kfree(hbeat_txf_buf);
-}
-
-module_init(init_hyperv_utils);
-module_exit(exit_hyperv_utils);
-
-MODULE_DESCRIPTION("Hyper-V Utilities");
-MODULE_VERSION(HV_DRV_VERSION);
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-10 17:36:39 +0000