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-rw-r--r--drivers/staging/hv/hv_util.c354
1 files changed, 0 insertions, 354 deletions
diff --git a/drivers/staging/hv/hv_util.c b/drivers/staging/hv/hv_util.c
deleted file mode 100644
index faa6607..0000000
--- a/drivers/staging/hv/hv_util.c
+++ /dev/null
@@ -1,354 +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 "hyperv.h"
-#include "hv_kvp.h"
-
-
-static void shutdown_onchannelcallback(void *context);
-static struct hv_util_service util_shutdown = {
- .util_cb = shutdown_onchannelcallback,
-};
-
-static void timesync_onchannelcallback(void *context);
-static struct hv_util_service util_timesynch = {
- .util_cb = timesync_onchannelcallback,
-};
-
-static void heartbeat_onchannelcallback(void *context);
-static struct hv_util_service util_heartbeat = {
- .util_cb = heartbeat_onchannelcallback,
-};
-
-static struct hv_util_service util_kvp = {
- .util_cb = hv_kvp_onchannelcallback,
- .util_init = hv_kvp_init,
- .util_deinit = hv_kvp_deinit,
-};
-
-static void shutdown_onchannelcallback(void *context)
-{
- struct vmbus_channel *channel = context;
- u32 recvlen;
- u64 requestid;
- u8 execute_shutdown = false;
- u8 *shut_txf_buf = util_shutdown.recv_buffer;
-
- 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(true);
-}
-
-/*
- * 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);
-}
-
-/*
- * Set the host time in a process context.
- */
-
-struct adj_time_work {
- struct work_struct work;
- u64 host_time;
-};
-
-static void hv_set_host_time(struct work_struct *work)
-{
- struct adj_time_work *wrk;
-
- wrk = container_of(work, struct adj_time_work, work);
- do_adj_guesttime(wrk->host_time);
- kfree(wrk);
-}
-
-/*
- * 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)
-{
- struct adj_time_work *wrk;
- static s32 scnt = 50;
-
- wrk = kmalloc(sizeof(struct adj_time_work), GFP_ATOMIC);
- if (wrk == NULL)
- return;
-
- wrk->host_time = hosttime;
- if ((flags & ICTIMESYNCFLAG_SYNC) != 0) {
- INIT_WORK(&wrk->work, hv_set_host_time);
- schedule_work(&wrk->work);
- return;
- }
-
- if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) {
- scnt--;
- INIT_WORK(&wrk->work, hv_set_host_time);
- schedule_work(&wrk->work);
- } else
- kfree(wrk);
-}
-
-/*
- * 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;
- u8 *time_txf_buf = util_timesynch.recv_buffer;
-
- 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;
- u8 *hbeat_txf_buf = util_heartbeat.recv_buffer;
-
- 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 int util_probe(struct hv_device *dev,
- const struct hv_vmbus_device_id *dev_id)
-{
- struct hv_util_service *srv =
- (struct hv_util_service *)dev_id->driver_data;
- int ret;
-
- srv->recv_buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!srv->recv_buffer)
- return -ENOMEM;
- if (srv->util_init) {
- ret = srv->util_init(srv);
- if (ret) {
- ret = -ENODEV;
- goto error1;
- }
- }
-
- ret = vmbus_open(dev->channel, 2 * PAGE_SIZE, 2 * PAGE_SIZE, NULL, 0,
- srv->util_cb, dev->channel);
- if (ret)
- goto error;
-
- hv_set_drvdata(dev, srv);
- return 0;
-
-error:
- if (srv->util_deinit)
- srv->util_deinit();
-error1:
- kfree(srv->recv_buffer);
- return ret;
-}
-
-static int util_remove(struct hv_device *dev)
-{
- struct hv_util_service *srv = hv_get_drvdata(dev);
-
- vmbus_close(dev->channel);
- if (srv->util_deinit)
- srv->util_deinit();
- kfree(srv->recv_buffer);
-
- return 0;
-}
-
-static const struct hv_vmbus_device_id id_table[] = {
- /* Shutdown guid */
- { VMBUS_DEVICE(0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
- 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB)
- .driver_data = (unsigned long)&util_shutdown },
- /* Time synch guid */
- { VMBUS_DEVICE(0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
- 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
- .driver_data = (unsigned long)&util_timesynch },
- /* Heartbeat guid */
- { VMBUS_DEVICE(0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
- 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
- .driver_data = (unsigned long)&util_heartbeat },
- /* KVP guid */
- { VMBUS_DEVICE(0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d,
- 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6)
- .driver_data = (unsigned long)&util_kvp },
- { },
-};
-
-MODULE_DEVICE_TABLE(vmbus, id_table);
-
-/* The one and only one */
-static struct hv_driver util_drv = {
- .name = "hv_util",
- .id_table = id_table,
- .probe = util_probe,
- .remove = util_remove,
-};
-
-static int __init init_hyperv_utils(void)
-{
- pr_info("Registering HyperV Utility Driver\n");
-
- return vmbus_driver_register(&util_drv);
-}
-
-static void exit_hyperv_utils(void)
-{
- pr_info("De-Registered HyperV Utility Driver\n");
-
- vmbus_driver_unregister(&util_drv);
-}
-
-module_init(init_hyperv_utils);
-module_exit(exit_hyperv_utils);
-
-MODULE_DESCRIPTION("Hyper-V Utilities");
-MODULE_VERSION(HV_DRV_VERSION);
-MODULE_LICENSE("GPL");
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