/*
* 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>
*
* 3/9/2011: K. Y. Srinivasan - Significant restructuring and cleanup
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/sysctl.h>
#include <linux/pci.h>
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/completion.h>
#include "version_info.h"
#include "hv_api.h"
#include "logging.h"
#include "vmbus.h"
#include "channel.h"
#include "vmbus_private.h"
struct pci_dev *hv_pci_dev;
/* Main vmbus driver data structure */
struct hv_bus {
struct bus_type bus;
struct tasklet_struct msg_dpc;
struct tasklet_struct event_dpc;
};
unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
EXPORT_SYMBOL(vmbus_loglevel);
/* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */
/* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */
static void get_channel_info(struct hv_device *device,
struct hv_device_info *info)
{
struct vmbus_channel_debug_info debug_info;
if (!device->channel)
return;
vmbus_get_debug_info(device->channel, &debug_info);
info->chn_id = debug_info.relid;
info->chn_state = debug_info.state;
memcpy(&info->chn_type, &debug_info.interfacetype,
sizeof(struct hv_guid));
memcpy(&info->chn_instance, &debug_info.interface_instance,
sizeof(struct hv_guid));
info->monitor_id = debug_info.monitorid;
info->server_monitor_pending = debug_info.servermonitor_pending;
info->server_monitor_latency = debug_info.servermonitor_latency;
info->server_monitor_conn_id = debug_info.servermonitor_connectionid;
info->client_monitor_pending = debug_info.clientmonitor_pending;
info->client_monitor_latency = debug_info.clientmonitor_latency;
info->client_monitor_conn_id = debug_info.clientmonitor_connectionid;
info->inbound.int_mask = debug_info.inbound.current_interrupt_mask;
info->inbound.read_idx = debug_info.inbound.current_read_index;
info->inbound.write_idx = debug_info.inbound.current_write_index;
info->inbound.bytes_avail_toread =
debug_info.inbound.bytes_avail_toread;
info->inbound.bytes_avail_towrite =
debug_info.inbound.bytes_avail_towrite;
info->outbound.int_mask =
debug_info.outbound.current_interrupt_mask;
info->outbound.read_idx = debug_info.outbound.current_read_index;
info->outbound.write_idx = debug_info.outbound.current_write_index;
info->outbound.bytes_avail_toread =
debug_info.outbound.bytes_avail_toread;
info->outbound.bytes_avail_towrite =
debug_info.outbound.bytes_avail_towrite;
}
/*
* vmbus_show_device_attr - Show the device attribute in sysfs.
*
* This is invoked when user does a
* "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>"
*/
static ssize_t vmbus_show_device_attr(struct device *dev,
struct device_attribute *dev_attr,
char *buf)
{
struct hv_device *device_ctx = device_to_hv_device(dev);
struct hv_device_info device_info;
memset(&device_info, 0, sizeof(struct hv_device_info));
get_channel_info(device_ctx, &device_info);
if (!strcmp(dev_attr->attr.name, "class_id")) {
return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x%02x%02x}\n",
device_info.chn_type.data[3],
device_info.chn_type.data[2],
device_info.chn_type.data[1],
device_info.chn_type.data[0],
device_info.chn_type.data[5],
device_info.chn_type.data[4],
device_info.chn_type.data[7],
device_info.chn_type.data[6],
device_info.chn_type.data[8],
device_info.chn_type.data[9],
device_info.chn_type.data[10],
device_info.chn_type.data[11],
device_info.chn_type.data[12],
device_info.chn_type.data[13],
device_info.chn_type.data[14],
device_info.chn_type.data[15]);
} else if (!strcmp(dev_attr->attr.name, "device_id")) {
return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x%02x%02x}\n",
device_info.chn_instance.data[3],
device_info.chn_instance.data[2],
device_info.chn_instance.data[1],
device_info.chn_instance.data[0],
device_info.chn_instance.data[5],
device_info.chn_instance.data[4],
device_info.chn_instance.data[7],
device_info.chn_instance.data[6],
device_info.chn_instance.data[8],
device_info.chn_instance.data[9],
device_info.chn_instance.data[10],
device_info.chn_instance.data[11],
device_info.chn_instance.data[12],
device_info.chn_instance.data[13],
device_info.chn_instance.data[14],
device_info.chn_instance.data[15]);
} else if (!strcmp(dev_attr->attr.name, "state")) {
return sprintf(buf, "%d\n", device_info.chn_state);
} else if (!strcmp(dev_attr->attr.name, "id")) {
return sprintf(buf, "%d\n", device_info.chn_id);
} else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) {
return sprintf(buf, "%d\n", device_info.outbound.int_mask);
} else if (!strcmp(dev_attr->attr.name, "out_read_index")) {
return sprintf(buf, "%d\n", device_info.outbound.read_idx);
} else if (!strcmp(dev_attr->attr.name, "out_write_index")) {
return sprintf(buf, "%d\n", device_info.outbound.write_idx);
} else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) {
return sprintf(buf, "%d\n",
device_info.outbound.bytes_avail_toread);
} else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) {
return sprintf(buf, "%d\n",
device_info.outbound.bytes_avail_towrite);
} else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) {
return sprintf(buf, "%d\n", device_info.inbound.int_mask);
} else if (!strcmp(dev_attr->attr.name, "in_read_index")) {
return sprintf(buf, "%d\n", device_info.inbound.read_idx);
} else if (!strcmp(dev_attr->attr.name, "in_write_index")) {
return sprintf(buf, "%d\n", device_info.inbound.write_idx);
} else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) {
return sprintf(buf, "%d\n",
device_info.inbound.bytes_avail_toread);
} else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) {
return sprintf(buf, "%d\n",
device_info.inbound.bytes_avail_towrite);
} else if (!strcmp(dev_attr->attr.name, "monitor_id")) {
return sprintf(buf, "%d\n", device_info.monitor_id);
} else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) {
return sprintf(buf, "%d\n", device_info.server_monitor_pending);
} else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) {
return sprintf(buf, "%d\n", device_info.server_monitor_latency);
} else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) {
return sprintf(buf, "%d\n",
device_info.server_monitor_conn_id);
} else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) {
return sprintf(buf, "%d\n", device_info.client_monitor_pending);
} else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) {
return sprintf(buf, "%d\n", device_info.client_monitor_latency);
} else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) {
return sprintf(buf, "%d\n",
device_info.client_monitor_conn_id);
} else {
return 0;
}
}
/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
static struct device_attribute vmbus_device_attrs[] = {
__ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR_NULL
};
/*
* vmbus_uevent - add uevent for our device
*
* This routine is invoked when a device is added or removed on the vmbus to
* generate a uevent to udev in the userspace. The udev will then look at its
* rule and the uevent generated here to load the appropriate driver
*/
static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
{
struct hv_device *dev = device_to_hv_device(device);
int ret;
ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={"
"%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x%02x%02x}",
dev->dev_type.data[3],
dev->dev_type.data[2],
dev->dev_type.data[1],
dev->dev_type.data[0],
dev->dev_type.data[5],
dev->dev_type.data[4],
dev->dev_type.data[7],
dev->dev_type.data[6],
dev->dev_type.data[8],
dev->dev_type.data[9],
dev->dev_type.data[10],
dev->dev_type.data[11],
dev->dev_type.data[12],
dev->dev_type.data[13],
dev->dev_type.data[14],
dev->dev_type.data[15]);
if (ret)
return ret;
ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
"%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x%02x%02x}",
dev->dev_instance.data[3],
dev->dev_instance.data[2],
dev->dev_instance.data[1],
dev->dev_instance.data[0],
dev->dev_instance.data[5],
dev->dev_instance.data[4],
dev->dev_instance.data[7],
dev->dev_instance.data[6],
dev->dev_instance.data[8],
dev->dev_instance.data[9],
dev->dev_instance.data[10],
dev->dev_instance.data[11],
dev->dev_instance.data[12],
dev->dev_instance.data[13],
dev->dev_instance.data[14],
dev->dev_instance.data[15]);
if (ret)
return ret;
return 0;
}
/*
* vmbus_match - Attempt to match the specified device to the specified driver
*/
static int vmbus_match(struct device *device, struct device_driver *driver)
{
int match = 0;
struct hv_driver *drv = drv_to_hv_drv(driver);
struct hv_device *device_ctx = device_to_hv_device(device);
/* We found our driver ? */
if (memcmp(&device_ctx->dev_type, &drv->dev_type,
sizeof(struct hv_guid)) == 0) {
device_ctx->drv = drv->priv;
match = 1;
}
return match;
}
/*
* vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe()
*
* We need a callback because we cannot invoked device_unregister() inside
* vmbus_probe() since vmbus_probe() may be invoked inside device_register()
* i.e. we cannot call device_unregister() inside device_register()
*/
static void vmbus_probe_failed_cb(struct work_struct *context)
{
struct hv_device *device_ctx = (struct hv_device *)context;
/*
* Kick off the process of unregistering the device.
* This will call vmbus_remove() and eventually vmbus_device_release()
*/
device_unregister(&device_ctx->device);
/* put_device(&device_ctx->device); */
}
/*
* vmbus_probe - Add the new vmbus's child device
*/
static int vmbus_probe(struct device *child_device)
{
int ret = 0;
struct hv_driver *drv =
drv_to_hv_drv(child_device->driver);
struct hv_device *dev = device_to_hv_device(child_device);
/* Let the specific open-source driver handles the probe if it can */
if (drv->driver.probe) {
ret = dev->probe_error =
drv->driver.probe(child_device);
if (ret != 0) {
pr_err("probe failed for device %s (%d)\n",
dev_name(child_device), ret);
INIT_WORK(&dev->probe_failed_work_item,
vmbus_probe_failed_cb);
schedule_work(&dev->probe_failed_work_item);
}
} else {
pr_err("probe not set for driver %s\n",
dev_name(child_device));
ret = -1;
}
return ret;
}
/*
* vmbus_remove - Remove a vmbus device
*/
static int vmbus_remove(struct device *child_device)
{
int ret;
struct hv_driver *drv;
if (child_device->driver) {
drv = drv_to_hv_drv(child_device->driver);
/*
* Let the specific open-source driver handles the removal if
* it can
*/
if (drv->driver.remove) {
ret = drv->driver.remove(child_device);
} else {
pr_err("remove not set for driver %s\n",
dev_name(child_device));
ret = -1;
}
}
return 0;
}
/*
* vmbus_shutdown - Shutdown a vmbus device
*/
static void vmbus_shutdown(struct device *child_device)
{
struct hv_driver *drv;
/* The device may not be attached yet */
if (!child_device->driver)
return;
drv = drv_to_hv_drv(child_device->driver);
/* Let the specific open-source driver handles the removal if it can */
if (drv->driver.shutdown)
drv->driver.shutdown(child_device);
return;
}
/*
* vmbus_device_release - Final callback release of the vmbus child device
*/
static void vmbus_device_release(struct device *device)
{
struct hv_device *device_ctx = device_to_hv_device(device);
kfree(device_ctx);
}
/* The one and only one */
static struct hv_bus hv_bus = {
.bus.name = "vmbus",
.bus.match = vmbus_match,
.bus.shutdown = vmbus_shutdown,
.bus.remove = vmbus_remove,
.bus.probe = vmbus_probe,
.bus.uevent = vmbus_uevent,
.bus.dev_attrs = vmbus_device_attrs,
};
static const char *driver_name = "hyperv";
struct onmessage_work_context {
struct work_struct work;
struct hv_message msg;
};
static void vmbus_onmessage_work(struct work_struct *work)
{
struct onmessage_work_context *ctx;
ctx = container_of(work, struct onmessage_work_context,
work);
vmbus_onmessage(&ctx->msg);
kfree(ctx);
}
/*
* vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior
*/
static void vmbus_on_msg_dpc(unsigned long data)
{
int cpu = smp_processor_id();
void *page_addr = hv_context.synic_message_page[cpu];
struct hv_message *msg = (struct hv_message *)page_addr +
VMBUS_MESSAGE_SINT;
struct onmessage_work_context *ctx;
while (1) {
if (msg->header.message_type == HVMSG_NONE) {
/* no msg */
break;
} else {
ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC);
if (ctx == NULL)
continue;
INIT_WORK(&ctx->work, vmbus_onmessage_work);
memcpy(&ctx->msg, msg, sizeof(*msg));
queue_work(vmbus_connection.work_queue, &ctx->work);
}
msg->header.message_type = HVMSG_NONE;
/*
* Make sure the write to MessageType (ie set to
* HVMSG_NONE) 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.message_flags.msg_pending) {
/*
* This will cause message queue rescan to
* possibly deliver another msg from the
* hypervisor
*/
wrmsrl(HV_X64_MSR_EOM, 0);
}
}
}
/*
* vmbus_on_isr - ISR routine
*/
static int vmbus_on_isr(void)
{
int ret = 0;
int cpu = smp_processor_id();
void *page_addr;
struct hv_message *msg;
union hv_synic_event_flags *event;
page_addr = hv_context.synic_message_page[cpu];
msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
/* Check if there are actual msgs to be process */
if (msg->header.message_type != HVMSG_NONE)
ret |= 0x1;
/* TODO: Check if there are events to be process */
page_addr = hv_context.synic_event_page[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 (sync_test_and_clear_bit(0, (unsigned long *) &event->flags32[0]))
ret |= 0x2;
return ret;
}
static irqreturn_t vmbus_isr(int irq, void *dev_id)
{
int ret;
ret = vmbus_on_isr();
/* Schedules a dpc if necessary */
if (ret > 0) {
if (test_bit(0, (unsigned long *)&ret))
tasklet_schedule(&hv_bus.msg_dpc);
if (test_bit(1, (unsigned long *)&ret))
tasklet_schedule(&hv_bus.event_dpc);
return IRQ_HANDLED;
} else {
return IRQ_NONE;
}
}
/*
* vmbus_bus_init -Main vmbus driver initialization routine.
*
* Here, we
* - initialize the vmbus driver context
* - invoke the vmbus hv main init routine
* - get the irq resource
* - retrieve the channel offers
*/
static int vmbus_bus_init(struct pci_dev *pdev)
{
int ret;
unsigned int vector;
/* Hypervisor initialization...setup hypercall page..etc */
ret = hv_init();
if (ret != 0) {
pr_err("Unable to initialize the hypervisor - 0x%x\n", ret);
goto cleanup;
}
hv_bus.bus.name = driver_name;
/* Initialize the bus context */
tasklet_init(&hv_bus.msg_dpc, vmbus_on_msg_dpc, 0);
tasklet_init(&hv_bus.event_dpc, vmbus_on_event, 0);
/* Now, register the bus with LDM */
ret = bus_register(&hv_bus.bus);
if (ret) {
ret = -1;
goto cleanup;
}
/* Get the interrupt resource */
ret = request_irq(pdev->irq, vmbus_isr,
IRQF_SHARED | IRQF_SAMPLE_RANDOM,
driver_name, pdev);
if (ret != 0) {
pr_err("Unable to request IRQ %d\n",
pdev->irq);
bus_unregister(&hv_bus.bus);
ret = -1;
goto cleanup;
}
vector = IRQ0_VECTOR + pdev->irq;
/*
* Notify the hypervisor of our irq and
* connect to the host.
*/
on_each_cpu(hv_synic_init, (void *)&vector, 1);
ret = vmbus_connect();
if (ret) {
free_irq(pdev->irq, pdev);
bus_unregister(&hv_bus.bus);
goto cleanup;
}
vmbus_request_offers();
wait_for_completion(&hv_channel_ready);
cleanup:
return ret;
}
/*
* vmbus_bus_exit - Terminate the vmbus driver.
*
* This routine is opposite of vmbus_bus_init()
*/
static void vmbus_bus_exit(void)
{
vmbus_release_unattached_channels();
vmbus_disconnect();
on_each_cpu(hv_synic_cleanup, NULL, 1);
hv_cleanup();
bus_unregister(&hv_bus.bus);
free_irq(hv_pci_dev->irq, hv_pci_dev);
tasklet_kill(&hv_bus.msg_dpc);
tasklet_kill(&hv_bus.event_dpc);
}
/**
* vmbus_child_driver_register() - Register a vmbus's child driver
* @drv: Pointer to driver structure you want to register
*
*
* Registers the given driver with Linux through the 'driver_register()' call
* And sets up the hyper-v vmbus handling for this driver.
* It will return the state of the 'driver_register()' call.
*
* Mainly used by Hyper-V drivers.
*/
int vmbus_child_driver_register(struct device_driver *drv)
{
int ret;
pr_info("child driver registering - name %s\n", drv->name);
/* The child driver on this vmbus */
drv->bus = &hv_bus.bus;
ret = driver_register(drv);
vmbus_request_offers();
return ret;
}
EXPORT_SYMBOL(vmbus_child_driver_register);
/**
* vmbus_child_driver_unregister() - Unregister a vmbus's child driver
* @drv: Pointer to driver structure you want to un-register
*
*
* Un-register the given driver with Linux through the 'driver_unregister()'
* call. And ungegisters the driver from the Hyper-V vmbus handler.
*
* Mainly used by Hyper-V drivers.
*/
void vmbus_child_driver_unregister(struct device_driver *drv)
{
pr_info("child driver unregistering - name %s\n", drv->name);
driver_unregister(drv);
drv->bus = NULL;
}
EXPORT_SYMBOL(vmbus_child_driver_unregister);
/*
* vmbus_child_device_create - Creates and registers a new child device
* on the vmbus.
*/
struct hv_device *vmbus_child_device_create(struct hv_guid *type,
struct hv_guid *instance,
struct vmbus_channel *channel)
{
struct hv_device *child_device_obj;
/* Allocate the new child device */
child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL);
if (!child_device_obj) {
pr_err("Unable to allocate device object for child device\n");
return NULL;
}
child_device_obj->channel = channel;
memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid));
memcpy(&child_device_obj->dev_instance, instance,
sizeof(struct hv_guid));
return child_device_obj;
}
/*
* vmbus_child_device_register - Register the child device
*/
int vmbus_child_device_register(struct hv_device *child_device_obj)
{
int ret = 0;
static atomic_t device_num = ATOMIC_INIT(0);
/* Set the device name. Otherwise, device_register() will fail. */
dev_set_name(&child_device_obj->device, "vmbus_0_%d",
atomic_inc_return(&device_num));
/* The new device belongs to this bus */
child_device_obj->device.bus = &hv_bus.bus; /* device->dev.bus; */
child_device_obj->device.parent = &hv_pci_dev->dev;
child_device_obj->device.release = vmbus_device_release;
/*
* Register with the LDM. This will kick off the driver/device
* binding...which will eventually call vmbus_match() and vmbus_probe()
*/
ret = device_register(&child_device_obj->device);
/* vmbus_probe() error does not get propergate to device_register(). */
ret = child_device_obj->probe_error;
if (ret)
pr_err("Unable to register child device\n");
else
pr_info("child device %s registered\n",
dev_name(&child_device_obj->device));
return ret;
}
/*
* vmbus_child_device_unregister - Remove the specified child device
* from the vmbus.
*/
void vmbus_child_device_unregister(struct hv_device *device_obj)
{
/*
* Kick off the process of unregistering the device.
* This will call vmbus_remove() and eventually vmbus_device_release()
*/
device_unregister(&device_obj->device);
pr_info("child device %s unregistered\n",
dev_name(&device_obj->device));
}
static int __devinit hv_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int err;
hv_pci_dev = pdev;
err = pci_enable_device(pdev);
if (err)
return err;
err = vmbus_bus_init(pdev);
if (err)
pci_disable_device(pdev);
return err;
}
/*
* We use a PCI table to determine if we should autoload this driver This is
* needed by distro tools to determine if the hyperv drivers should be
* installed and/or configured. We don't do anything else with the table, but
* it needs to be present.
*/
static const struct pci_device_id microsoft_hv_pci_table[] = {
{ PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */
{ 0 }
};
MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table);
static struct pci_driver hv_bus_driver = {
.name = "hv_bus",
.probe = hv_pci_probe,
.id_table = microsoft_hv_pci_table,
};
static int __init hv_pci_init(void)
{
return pci_register_driver(&hv_bus_driver);
}
static void __exit hv_pci_exit(void)
{
vmbus_bus_exit();
pci_unregister_driver(&hv_bus_driver);
}
MODULE_LICENSE("GPL");
MODULE_VERSION(HV_DRV_VERSION);
module_param(vmbus_loglevel, int, S_IRUGO);
module_init(hv_pci_init);
module_exit(hv_pci_exit);