b3bfb3cecf
Reorder some functions to get rid of all of the forward declarations. Cc: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
312 lines
8.0 KiB
C
312 lines
8.0 KiB
C
/*
|
|
* Copyright (c) 2009, 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>
|
|
*
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include "osd.h"
|
|
#include "logging.h"
|
|
#include "VersionInfo.h"
|
|
#include "VmbusPrivate.h"
|
|
|
|
static const char *gDriverName = "vmbus";
|
|
|
|
/*
|
|
* Windows vmbus does not defined this.
|
|
* We defined this to be consistent with other devices
|
|
*/
|
|
/* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */
|
|
static const struct hv_guid gVmbusDeviceType = {
|
|
.data = {
|
|
0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d,
|
|
0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85
|
|
}
|
|
};
|
|
|
|
/* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */
|
|
static const struct hv_guid gVmbusDeviceId = {
|
|
.data = {
|
|
0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40,
|
|
0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5
|
|
}
|
|
};
|
|
|
|
static struct hv_driver *gDriver; /* vmbus driver object */
|
|
static struct hv_device *gDevice; /* vmbus root device */
|
|
|
|
/**
|
|
* VmbusGetChannelOffers - Retrieve the channel offers from the parent partition
|
|
*/
|
|
static void VmbusGetChannelOffers(void)
|
|
{
|
|
DPRINT_ENTER(VMBUS);
|
|
VmbusChannelRequestOffers();
|
|
DPRINT_EXIT(VMBUS);
|
|
}
|
|
|
|
/**
|
|
* VmbusGetChannelInterface - Get the channel interface
|
|
*/
|
|
static void VmbusGetChannelInterface(struct vmbus_channel_interface *Interface)
|
|
{
|
|
GetChannelInterface(Interface);
|
|
}
|
|
|
|
/**
|
|
* VmbusGetChannelInfo - Get the device info for the specified device object
|
|
*/
|
|
static void VmbusGetChannelInfo(struct hv_device *DeviceObject,
|
|
struct hv_device_info *DeviceInfo)
|
|
{
|
|
GetChannelInfo(DeviceObject, DeviceInfo);
|
|
}
|
|
|
|
/**
|
|
* VmbusCreateChildDevice - Creates the child device on the bus that represents the channel offer
|
|
*/
|
|
struct hv_device *VmbusChildDeviceCreate(struct hv_guid *DeviceType,
|
|
struct hv_guid *DeviceInstance,
|
|
void *Context)
|
|
{
|
|
struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver;
|
|
|
|
return vmbusDriver->OnChildDeviceCreate(DeviceType, DeviceInstance,
|
|
Context);
|
|
}
|
|
|
|
/**
|
|
* VmbusChildDeviceAdd - Registers the child device with the vmbus
|
|
*/
|
|
int VmbusChildDeviceAdd(struct hv_device *ChildDevice)
|
|
{
|
|
struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver;
|
|
|
|
return vmbusDriver->OnChildDeviceAdd(gDevice, ChildDevice);
|
|
}
|
|
|
|
/**
|
|
* VmbusChildDeviceRemove Unregisters the child device from the vmbus
|
|
*/
|
|
void VmbusChildDeviceRemove(struct hv_device *ChildDevice)
|
|
{
|
|
struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver;
|
|
|
|
vmbusDriver->OnChildDeviceRemove(ChildDevice);
|
|
}
|
|
|
|
/**
|
|
* VmbusOnDeviceAdd - Callback when the root bus device is added
|
|
*/
|
|
static int VmbusOnDeviceAdd(struct hv_device *dev, void *AdditionalInfo)
|
|
{
|
|
u32 *irqvector = AdditionalInfo;
|
|
int ret;
|
|
|
|
DPRINT_ENTER(VMBUS);
|
|
|
|
gDevice = dev;
|
|
|
|
memcpy(&gDevice->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid));
|
|
memcpy(&gDevice->deviceInstance, &gVmbusDeviceId,
|
|
sizeof(struct hv_guid));
|
|
|
|
/* strcpy(dev->name, "vmbus"); */
|
|
/* SynIC setup... */
|
|
ret = HvSynicInit(*irqvector);
|
|
|
|
/* Connect to VMBus in the root partition */
|
|
ret = VmbusConnect();
|
|
|
|
/* VmbusSendEvent(device->localPortId+1); */
|
|
DPRINT_EXIT(VMBUS);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* VmbusOnDeviceRemove - Callback when the root bus device is removed
|
|
*/
|
|
static int VmbusOnDeviceRemove(struct hv_device *dev)
|
|
{
|
|
int ret = 0;
|
|
|
|
DPRINT_ENTER(VMBUS);
|
|
VmbusChannelReleaseUnattachedChannels();
|
|
VmbusDisconnect();
|
|
HvSynicCleanup();
|
|
DPRINT_EXIT(VMBUS);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* VmbusOnCleanup - Perform any cleanup when the driver is removed
|
|
*/
|
|
static void VmbusOnCleanup(struct hv_driver *drv)
|
|
{
|
|
/* struct vmbus_driver *driver = (struct vmbus_driver *)drv; */
|
|
|
|
DPRINT_ENTER(VMBUS);
|
|
HvCleanup();
|
|
DPRINT_EXIT(VMBUS);
|
|
}
|
|
|
|
/**
|
|
* VmbusOnMsgDPC - DPC routine to handle messages from the hypervisior
|
|
*/
|
|
static void VmbusOnMsgDPC(struct hv_driver *drv)
|
|
{
|
|
void *page_addr = gHvContext.synICMessagePage[0];
|
|
struct hv_message *msg = (struct hv_message *)page_addr +
|
|
VMBUS_MESSAGE_SINT;
|
|
struct hv_message *copied;
|
|
|
|
while (1) {
|
|
if (msg->Header.MessageType == HvMessageTypeNone) {
|
|
/* no msg */
|
|
break;
|
|
} else {
|
|
copied = kmalloc(sizeof(*copied), GFP_ATOMIC);
|
|
if (copied == NULL)
|
|
continue;
|
|
|
|
memcpy(copied, msg, sizeof(*copied));
|
|
osd_schedule_callback(gVmbusConnection.WorkQueue,
|
|
VmbusOnChannelMessage,
|
|
(void *)copied);
|
|
}
|
|
|
|
msg->Header.MessageType = HvMessageTypeNone;
|
|
|
|
/*
|
|
* Make sure the write to MessageType (ie set to
|
|
* HvMessageTypeNone) happens before we read the
|
|
* MessagePending and EOMing. Otherwise, the EOMing
|
|
* will not deliver any more messages since there is
|
|
* no empty slot
|
|
*/
|
|
mb();
|
|
|
|
if (msg->Header.MessageFlags.MessagePending) {
|
|
/*
|
|
* This will cause message queue rescan to
|
|
* possibly deliver another msg from the
|
|
* hypervisor
|
|
*/
|
|
wrmsrl(HV_X64_MSR_EOM, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* VmbusOnEventDPC - DPC routine to handle events from the hypervisior
|
|
*/
|
|
static void VmbusOnEventDPC(struct hv_driver *drv)
|
|
{
|
|
/* TODO: Process any events */
|
|
VmbusOnEvents();
|
|
}
|
|
|
|
/**
|
|
* VmbusOnISR - ISR routine
|
|
*/
|
|
static int VmbusOnISR(struct hv_driver *drv)
|
|
{
|
|
int ret = 0;
|
|
void *page_addr;
|
|
struct hv_message *msg;
|
|
union hv_synic_event_flags *event;
|
|
|
|
page_addr = gHvContext.synICMessagePage[0];
|
|
msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
|
|
|
|
DPRINT_ENTER(VMBUS);
|
|
|
|
/* Check if there are actual msgs to be process */
|
|
if (msg->Header.MessageType != HvMessageTypeNone) {
|
|
DPRINT_DBG(VMBUS, "received msg type %d size %d",
|
|
msg->Header.MessageType,
|
|
msg->Header.PayloadSize);
|
|
ret |= 0x1;
|
|
}
|
|
|
|
/* TODO: Check if there are events to be process */
|
|
page_addr = gHvContext.synICEventPage[0];
|
|
event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT;
|
|
|
|
/* Since we are a child, we only need to check bit 0 */
|
|
if (test_and_clear_bit(0, (unsigned long *) &event->Flags32[0])) {
|
|
DPRINT_DBG(VMBUS, "received event %d", event->Flags32[0]);
|
|
ret |= 0x2;
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* VmbusInitialize - Main entry point
|
|
*/
|
|
int VmbusInitialize(struct hv_driver *drv)
|
|
{
|
|
struct vmbus_driver *driver = (struct vmbus_driver *)drv;
|
|
int ret;
|
|
|
|
DPRINT_ENTER(VMBUS);
|
|
|
|
DPRINT_INFO(VMBUS, "+++++++ Build Date=%s %s +++++++",
|
|
VersionDate, VersionTime);
|
|
DPRINT_INFO(VMBUS, "+++++++ Build Description=%s +++++++",
|
|
VersionDesc);
|
|
DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++",
|
|
VMBUS_REVISION_NUMBER);
|
|
DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++",
|
|
VMBUS_MESSAGE_SINT);
|
|
DPRINT_DBG(VMBUS, "sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER)=%zd, "
|
|
"sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd",
|
|
sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER),
|
|
sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER));
|
|
|
|
drv->name = gDriverName;
|
|
memcpy(&drv->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid));
|
|
|
|
/* Setup dispatch table */
|
|
driver->Base.OnDeviceAdd = VmbusOnDeviceAdd;
|
|
driver->Base.OnDeviceRemove = VmbusOnDeviceRemove;
|
|
driver->Base.OnCleanup = VmbusOnCleanup;
|
|
driver->OnIsr = VmbusOnISR;
|
|
driver->OnMsgDpc = VmbusOnMsgDPC;
|
|
driver->OnEventDpc = VmbusOnEventDPC;
|
|
driver->GetChannelOffers = VmbusGetChannelOffers;
|
|
driver->GetChannelInterface = VmbusGetChannelInterface;
|
|
driver->GetChannelInfo = VmbusGetChannelInfo;
|
|
|
|
/* Hypervisor initialization...setup hypercall page..etc */
|
|
ret = HvInit();
|
|
if (ret != 0)
|
|
DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x",
|
|
ret);
|
|
gDriver = drv;
|
|
|
|
DPRINT_EXIT(VMBUS);
|
|
|
|
return ret;
|
|
}
|