diff options
Diffstat (limited to 'drivers/staging/hv/vmbus.c')
| -rw-r--r-- | drivers/staging/hv/vmbus.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/drivers/staging/hv/vmbus.c b/drivers/staging/hv/vmbus.c deleted file mode 100644 index d449daf81976..000000000000 --- a/drivers/staging/hv/vmbus.c +++ /dev/null @@ -1,274 +0,0 @@ -/* - * 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; -} |