From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Ky Srinivasan" Subject: [PATCH 2/3]: An implementation of HyperV KVP functionality Date: Tue, 07 Dec 2010 15:25:56 -0700 Message-ID: <4CFE5204020000300009174C@novprvoes0310.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: devel-bounces@linuxdriverproject.org Errors-To: devel-bounces@linuxdriverproject.org To: devel@driverdev.osuosl.org, Virtualization@lists.osdl.org Cc: Zbr@ioremap.net, Haiyang Zhang , Stephen Hemminger , Greg KH List-Id: virtualization@lists.linuxfoundation.org This patch is re-based on the latest linux-next tree. From: K. Y. Srinivasan Subject: The hv_utils module will be composed of more than one file; rename hv_utils.c to accommodate this without changing the module name. Signed-off-by: K. Y. Srinivasan Index: linux.trees.git/drivers/staging/hv/Makefile =================================================================== --- linux.trees.git.orig/drivers/staging/hv/Makefile 2010-12-07 07:04:41.000000000 -0500 +++ linux.trees.git/drivers/staging/hv/Makefile 2010-12-07 08:00:10.000000000 -0500 @@ -10,3 +10,4 @@ hv_vmbus-y := vmbus_drv.o osd.o \ hv_storvsc-y := storvsc_drv.o storvsc.o hv_blkvsc-y := blkvsc_drv.o blkvsc.o hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o +hv_utils-y := hv_util.o Index: linux.trees.git/drivers/staging/hv/hv_util.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux.trees.git/drivers/staging/hv/hv_util.c 2010-12-07 08:00:10.000000000 -0500 @@ -0,0 +1,308 @@ +/* + * 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 + * Hank Janssen + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "logging.h" +#include "osd.h" +#include "vmbus.h" +#include "vmbus_packet_format.h" +#include "vmbus_channel_interface.h" +#include "version_info.h" +#include "channel.h" +#include "vmbus_private.h" +#include "vmbus_api.h" +#include "utils.h" + + +static void shutdown_onchannelcallback(void *context) +{ + struct vmbus_channel *channel = context; + u8 *buf; + u32 buflen, recvlen; + u64 requestid; + u8 execute_shutdown = false; + + struct shutdown_msg_data *shutdown_msg; + + struct icmsg_hdr *icmsghdrp; + struct icmsg_negotiate *negop = NULL; + + buflen = PAGE_SIZE; + buf = kmalloc(buflen, GFP_ATOMIC); + + vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); + + if (recvlen > 0) { + DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld", + recvlen, requestid); + + icmsghdrp = (struct icmsg_hdr *)&buf[ + sizeof(struct vmbuspipe_hdr)]; + + if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { + prep_negotiate_resp(icmsghdrp, negop, buf); + } else { + shutdown_msg = (struct shutdown_msg_data *)&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; + + DPRINT_INFO(VMBUS, "Shutdown request received -" + " gracefull shutdown initiated"); + break; + default: + icmsghdrp->status = HV_E_FAIL; + execute_shutdown = false; + + DPRINT_INFO(VMBUS, "Shutdown request received -" + " Invalid request"); + break; + }; + } + + icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION + | ICMSGHDRFLAG_RESPONSE; + + vmbus_sendpacket(channel, buf, + recvlen, requestid, + VmbusPacketTypeDataInBand, 0); + } + + kfree(buf); + + 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; + u8 *buf; + u32 buflen, recvlen; + u64 requestid; + struct icmsg_hdr *icmsghdrp; + struct ictimesync_data *timedatap; + + buflen = PAGE_SIZE; + buf = kmalloc(buflen, GFP_ATOMIC); + + vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); + + if (recvlen > 0) { + DPRINT_DBG(VMBUS, "timesync packet: recvlen=%d, requestid=%lld", + recvlen, requestid); + + icmsghdrp = (struct icmsg_hdr *)&buf[ + sizeof(struct vmbuspipe_hdr)]; + + if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { + prep_negotiate_resp(icmsghdrp, NULL, buf); + } else { + timedatap = (struct ictimesync_data *)&buf[ + sizeof(struct vmbuspipe_hdr) + + sizeof(struct icmsg_hdr)]; + adj_guesttime(timedatap->parenttime, timedatap->flags); + } + + icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION + | ICMSGHDRFLAG_RESPONSE; + + vmbus_sendpacket(channel, buf, + recvlen, requestid, + VmbusPacketTypeDataInBand, 0); + } + + kfree(buf); +} + +/* + * 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; + u8 *buf; + u32 buflen, recvlen; + u64 requestid; + struct icmsg_hdr *icmsghdrp; + struct heartbeat_msg_data *heartbeat_msg; + + buflen = PAGE_SIZE; + buf = kmalloc(buflen, GFP_ATOMIC); + + vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); + + if (recvlen > 0) { + DPRINT_DBG(VMBUS, "heartbeat packet: len=%d, requestid=%lld", + recvlen, requestid); + + icmsghdrp = (struct icmsg_hdr *)&buf[ + sizeof(struct vmbuspipe_hdr)]; + + if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { + prep_negotiate_resp(icmsghdrp, NULL, buf); + } else { + heartbeat_msg = (struct heartbeat_msg_data *)&buf[ + sizeof(struct vmbuspipe_hdr) + + sizeof(struct icmsg_hdr)]; + + DPRINT_DBG(VMBUS, "heartbeat seq = %lld", + heartbeat_msg->seq_num); + + heartbeat_msg->seq_num += 1; + } + + icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION + | ICMSGHDRFLAG_RESPONSE; + + vmbus_sendpacket(channel, buf, + recvlen, requestid, + VmbusPacketTypeDataInBand, 0); + } + + kfree(buf); +} + +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) +{ + printk(KERN_INFO "Registering HyperV Utility Driver\n"); + + if (!dmi_check_system(hv_utils_dmi_table)) + return -ENODEV; + + hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback = + &shutdown_onchannelcallback; + hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback; + + hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback = + ×ync_onchannelcallback; + hv_cb_utils[HV_TIMESYNC_MSG].callback = ×ync_onchannelcallback; + + hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback = + &heartbeat_onchannelcallback; + hv_cb_utils[HV_HEARTBEAT_MSG].callback = &heartbeat_onchannelcallback; + + return 0; +} + +static void exit_hyperv_utils(void) +{ + printk(KERN_INFO "De-Registered HyperV Utility Driver\n"); + + hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback = + &chn_cb_negotiate; + hv_cb_utils[HV_SHUTDOWN_MSG].callback = &chn_cb_negotiate; + + hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback = + &chn_cb_negotiate; + hv_cb_utils[HV_TIMESYNC_MSG].callback = &chn_cb_negotiate; + + hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback = + &chn_cb_negotiate; + hv_cb_utils[HV_HEARTBEAT_MSG].callback = &chn_cb_negotiate; +} + +module_init(init_hyperv_utils); +module_exit(exit_hyperv_utils); + +MODULE_DESCRIPTION("Hyper-V Utilities"); +MODULE_VERSION(HV_DRV_VERSION); +MODULE_LICENSE("GPL"); Index: linux.trees.git/drivers/staging/hv/hv_utils.c =================================================================== --- linux.trees.git.orig/drivers/staging/hv/hv_utils.c 2010-12-07 07:04:41.000000000 -0500 +++ /dev/null 1970-01-01 00:00:00.000000000 +0000 @@ -1,308 +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 - * Hank Janssen - */ -#include -#include -#include -#include -#include -#include -#include -#include - -#include "logging.h" -#include "osd.h" -#include "vmbus.h" -#include "vmbus_packet_format.h" -#include "vmbus_channel_interface.h" -#include "version_info.h" -#include "channel.h" -#include "vmbus_private.h" -#include "vmbus_api.h" -#include "utils.h" - - -static void shutdown_onchannelcallback(void *context) -{ - struct vmbus_channel *channel = context; - u8 *buf; - u32 buflen, recvlen; - u64 requestid; - u8 execute_shutdown = false; - - struct shutdown_msg_data *shutdown_msg; - - struct icmsg_hdr *icmsghdrp; - struct icmsg_negotiate *negop = NULL; - - buflen = PAGE_SIZE; - buf = kmalloc(buflen, GFP_ATOMIC); - - vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); - - if (recvlen > 0) { - DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld", - recvlen, requestid); - - icmsghdrp = (struct icmsg_hdr *)&buf[ - sizeof(struct vmbuspipe_hdr)]; - - if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { - prep_negotiate_resp(icmsghdrp, negop, buf); - } else { - shutdown_msg = (struct shutdown_msg_data *)&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; - - DPRINT_INFO(VMBUS, "Shutdown request received -" - " gracefull shutdown initiated"); - break; - default: - icmsghdrp->status = HV_E_FAIL; - execute_shutdown = false; - - DPRINT_INFO(VMBUS, "Shutdown request received -" - " Invalid request"); - break; - }; - } - - icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION - | ICMSGHDRFLAG_RESPONSE; - - vmbus_sendpacket(channel, buf, - recvlen, requestid, - VmbusPacketTypeDataInBand, 0); - } - - kfree(buf); - - 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; - u8 *buf; - u32 buflen, recvlen; - u64 requestid; - struct icmsg_hdr *icmsghdrp; - struct ictimesync_data *timedatap; - - buflen = PAGE_SIZE; - buf = kmalloc(buflen, GFP_ATOMIC); - - vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); - - if (recvlen > 0) { - DPRINT_DBG(VMBUS, "timesync packet: recvlen=%d, requestid=%lld", - recvlen, requestid); - - icmsghdrp = (struct icmsg_hdr *)&buf[ - sizeof(struct vmbuspipe_hdr)]; - - if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { - prep_negotiate_resp(icmsghdrp, NULL, buf); - } else { - timedatap = (struct ictimesync_data *)&buf[ - sizeof(struct vmbuspipe_hdr) + - sizeof(struct icmsg_hdr)]; - adj_guesttime(timedatap->parenttime, timedatap->flags); - } - - icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION - | ICMSGHDRFLAG_RESPONSE; - - vmbus_sendpacket(channel, buf, - recvlen, requestid, - VmbusPacketTypeDataInBand, 0); - } - - kfree(buf); -} - -/* - * 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; - u8 *buf; - u32 buflen, recvlen; - u64 requestid; - struct icmsg_hdr *icmsghdrp; - struct heartbeat_msg_data *heartbeat_msg; - - buflen = PAGE_SIZE; - buf = kmalloc(buflen, GFP_ATOMIC); - - vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); - - if (recvlen > 0) { - DPRINT_DBG(VMBUS, "heartbeat packet: len=%d, requestid=%lld", - recvlen, requestid); - - icmsghdrp = (struct icmsg_hdr *)&buf[ - sizeof(struct vmbuspipe_hdr)]; - - if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { - prep_negotiate_resp(icmsghdrp, NULL, buf); - } else { - heartbeat_msg = (struct heartbeat_msg_data *)&buf[ - sizeof(struct vmbuspipe_hdr) + - sizeof(struct icmsg_hdr)]; - - DPRINT_DBG(VMBUS, "heartbeat seq = %lld", - heartbeat_msg->seq_num); - - heartbeat_msg->seq_num += 1; - } - - icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION - | ICMSGHDRFLAG_RESPONSE; - - vmbus_sendpacket(channel, buf, - recvlen, requestid, - VmbusPacketTypeDataInBand, 0); - } - - kfree(buf); -} - -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) -{ - printk(KERN_INFO "Registering HyperV Utility Driver\n"); - - if (!dmi_check_system(hv_utils_dmi_table)) - return -ENODEV; - - hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback = - &shutdown_onchannelcallback; - hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback; - - hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback = - ×ync_onchannelcallback; - hv_cb_utils[HV_TIMESYNC_MSG].callback = ×ync_onchannelcallback; - - hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback = - &heartbeat_onchannelcallback; - hv_cb_utils[HV_HEARTBEAT_MSG].callback = &heartbeat_onchannelcallback; - - return 0; -} - -static void exit_hyperv_utils(void) -{ - printk(KERN_INFO "De-Registered HyperV Utility Driver\n"); - - hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback = - &chn_cb_negotiate; - hv_cb_utils[HV_SHUTDOWN_MSG].callback = &chn_cb_negotiate; - - hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback = - &chn_cb_negotiate; - hv_cb_utils[HV_TIMESYNC_MSG].callback = &chn_cb_negotiate; - - hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback = - &chn_cb_negotiate; - hv_cb_utils[HV_HEARTBEAT_MSG].callback = &chn_cb_negotiate; -} - -module_init(init_hyperv_utils); -module_exit(exit_hyperv_utils); - -MODULE_DESCRIPTION("Hyper-V Utilities"); -MODULE_VERSION(HV_DRV_VERSION); -MODULE_LICENSE("GPL");