+++ /dev/null
-/*
- * 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 <linux/slab.h>
-#include "osd.h"
-#include "logging.h"
-#include "version_info.h"
-#include "vmbus_private.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)
-{
- vmbus_request_offers();
-}
-
-/*
- * 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,
- struct vmbus_channel *channel)
-{
- struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver;
-
- return vmbusDriver->OnChildDeviceCreate(DeviceType, DeviceInstance,
- channel);
-}
-
-/*
- * 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;
-
- gDevice = dev;
-
- memcpy(&gDevice->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid));
- memcpy(&gDevice->deviceInstance, &gVmbusDeviceId,
- sizeof(struct hv_guid));
-
- /* strcpy(dev->name, "vmbus"); */
- /* SynIC setup... */
- on_each_cpu(HvSynicInit, (void *)irqvector, 1);
-
- /* Connect to VMBus in the root partition */
- ret = VmbusConnect();
-
- /* VmbusSendEvent(device->localPortId+1); */
- return ret;
-}
-
-/*
- * VmbusOnDeviceRemove - Callback when the root bus device is removed
- */
-static int VmbusOnDeviceRemove(struct hv_device *dev)
-{
- int ret = 0;
-
- vmbus_release_unattached_channels();
- VmbusDisconnect();
- on_each_cpu(HvSynicCleanup, NULL, 1);
- 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; */
-
- HvCleanup();
-}
-
-/*
- * VmbusOnMsgDPC - DPC routine to handle messages from the hypervisior
- */
-static void VmbusOnMsgDPC(struct hv_driver *drv)
-{
- int cpu = smp_processor_id();
- void *page_addr = gHvContext.synICMessagePage[cpu];
- 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 = kmemdup(msg, sizeof(*copied), GFP_ATOMIC);
- if (copied == NULL)
- continue;
-
- osd_schedule_callback(gVmbusConnection.WorkQueue,
- vmbus_onmessage,
- (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;
- int cpu = smp_processor_id();
- void *page_addr;
- struct hv_message *msg;
- union hv_synic_event_flags *event;
-
- page_addr = gHvContext.synICMessagePage[cpu];
- msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
-
- /* 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[cpu];
- 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;
- }
-
- return ret;
-}
-
-/*
- * VmbusInitialize - Main entry point
- */
-int VmbusInitialize(struct hv_driver *drv)
-{
- struct vmbus_driver *driver = (struct vmbus_driver *)drv;
- int ret;
-
- DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++",
- HV_DRV_VERSION);
- 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_multipage_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;
-
- /* Hypervisor initialization...setup hypercall page..etc */
- ret = HvInit();
- if (ret != 0)
- DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x",
- ret);
- gDriver = drv;
-
- return ret;
-}
projects / mv-sheeva.git / blobdiff