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Diffstat (limited to 'drivers/staging/hv/vmbus_drv.c')
-rw-r--r--drivers/staging/hv/vmbus_drv.c772
1 files changed, 0 insertions, 772 deletions
diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
deleted file mode 100644
index d2562af..0000000
--- a/drivers/staging/hv/vmbus_drv.c
+++ /dev/null
@@ -1,772 +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>
- * K. Y. Srinivasan <kys@microsoft.com>
- *
- */
-#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/slab.h>
-#include <linux/acpi.h>
-#include <acpi/acpi_bus.h>
-#include <linux/completion.h>
-
-#include "hyperv.h"
-#include "hyperv_vmbus.h"
-
-
-static struct acpi_device *hv_acpi_dev;
-
-static struct tasklet_struct msg_dpc;
-static struct tasklet_struct event_dpc;
-
-unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
-EXPORT_SYMBOL(vmbus_loglevel);
-
-static struct completion probe_event;
-static int irq;
-
-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(uuid_le));
- memcpy(&info->chn_instance, &debug_info.interface_instance,
- sizeof(uuid_le));
-
- 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;
-}
-
-#define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2)
-static void print_alias_name(struct hv_device *hv_dev, char *alias_name)
-{
- int i;
- for (i = 0; i < VMBUS_ALIAS_LEN; i += 2)
- sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]);
-}
-
-/*
- * 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 *hv_dev = device_to_hv_device(dev);
- struct hv_device_info *device_info;
- char alias_name[VMBUS_ALIAS_LEN + 1];
- int ret = 0;
-
- device_info = kzalloc(sizeof(struct hv_device_info), GFP_KERNEL);
- if (!device_info)
- return ret;
-
- get_channel_info(hv_dev, device_info);
-
- if (!strcmp(dev_attr->attr.name, "class_id")) {
- ret = sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
- device_info->chn_type.b[3],
- device_info->chn_type.b[2],
- device_info->chn_type.b[1],
- device_info->chn_type.b[0],
- device_info->chn_type.b[5],
- device_info->chn_type.b[4],
- device_info->chn_type.b[7],
- device_info->chn_type.b[6],
- device_info->chn_type.b[8],
- device_info->chn_type.b[9],
- device_info->chn_type.b[10],
- device_info->chn_type.b[11],
- device_info->chn_type.b[12],
- device_info->chn_type.b[13],
- device_info->chn_type.b[14],
- device_info->chn_type.b[15]);
- } else if (!strcmp(dev_attr->attr.name, "device_id")) {
- ret = sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
- device_info->chn_instance.b[3],
- device_info->chn_instance.b[2],
- device_info->chn_instance.b[1],
- device_info->chn_instance.b[0],
- device_info->chn_instance.b[5],
- device_info->chn_instance.b[4],
- device_info->chn_instance.b[7],
- device_info->chn_instance.b[6],
- device_info->chn_instance.b[8],
- device_info->chn_instance.b[9],
- device_info->chn_instance.b[10],
- device_info->chn_instance.b[11],
- device_info->chn_instance.b[12],
- device_info->chn_instance.b[13],
- device_info->chn_instance.b[14],
- device_info->chn_instance.b[15]);
- } else if (!strcmp(dev_attr->attr.name, "modalias")) {
- print_alias_name(hv_dev, alias_name);
- ret = sprintf(buf, "vmbus:%s\n", alias_name);
- } else if (!strcmp(dev_attr->attr.name, "state")) {
- ret = sprintf(buf, "%d\n", device_info->chn_state);
- } else if (!strcmp(dev_attr->attr.name, "id")) {
- ret = sprintf(buf, "%d\n", device_info->chn_id);
- } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) {
- ret = sprintf(buf, "%d\n", device_info->outbound.int_mask);
- } else if (!strcmp(dev_attr->attr.name, "out_read_index")) {
- ret = sprintf(buf, "%d\n", device_info->outbound.read_idx);
- } else if (!strcmp(dev_attr->attr.name, "out_write_index")) {
- ret = sprintf(buf, "%d\n", device_info->outbound.write_idx);
- } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) {
- ret = sprintf(buf, "%d\n",
- device_info->outbound.bytes_avail_toread);
- } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) {
- ret = sprintf(buf, "%d\n",
- device_info->outbound.bytes_avail_towrite);
- } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) {
- ret = sprintf(buf, "%d\n", device_info->inbound.int_mask);
- } else if (!strcmp(dev_attr->attr.name, "in_read_index")) {
- ret = sprintf(buf, "%d\n", device_info->inbound.read_idx);
- } else if (!strcmp(dev_attr->attr.name, "in_write_index")) {
- ret = sprintf(buf, "%d\n", device_info->inbound.write_idx);
- } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) {
- ret = sprintf(buf, "%d\n",
- device_info->inbound.bytes_avail_toread);
- } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) {
- ret = sprintf(buf, "%d\n",
- device_info->inbound.bytes_avail_towrite);
- } else if (!strcmp(dev_attr->attr.name, "monitor_id")) {
- ret = sprintf(buf, "%d\n", device_info->monitor_id);
- } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) {
- ret = sprintf(buf, "%d\n", device_info->server_monitor_pending);
- } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) {
- ret = sprintf(buf, "%d\n", device_info->server_monitor_latency);
- } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) {
- ret = sprintf(buf, "%d\n",
- device_info->server_monitor_conn_id);
- } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) {
- ret = sprintf(buf, "%d\n", device_info->client_monitor_pending);
- } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) {
- ret = sprintf(buf, "%d\n", device_info->client_monitor_latency);
- } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) {
- ret = sprintf(buf, "%d\n",
- device_info->client_monitor_conn_id);
- }
-
- kfree(device_info);
- return ret;
-}
-
-/* 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(modalias, 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
- *
- * The alias string will be of the form vmbus:guid where guid is the string
- * representation of the device guid (each byte of the guid will be
- * represented with two hex characters.
- */
-static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
-{
- struct hv_device *dev = device_to_hv_device(device);
- int ret;
- char alias_name[VMBUS_ALIAS_LEN + 1];
-
- print_alias_name(dev, alias_name);
- ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name);
- return ret;
-}
-
-static uuid_le null_guid;
-
-static inline bool is_null_guid(const __u8 *guid)
-{
- if (memcmp(guid, &null_guid, sizeof(uuid_le)))
- return false;
- return true;
-}
-
-/*
- * Return a matching hv_vmbus_device_id pointer.
- * If there is no match, return NULL.
- */
-static const struct hv_vmbus_device_id *hv_vmbus_get_id(
- const struct hv_vmbus_device_id *id,
- __u8 *guid)
-{
- for (; !is_null_guid(id->guid); id++)
- if (!memcmp(&id->guid, guid, sizeof(uuid_le)))
- return id;
-
- return NULL;
-}
-
-
-
-/*
- * vmbus_match - Attempt to match the specified device to the specified driver
- */
-static int vmbus_match(struct device *device, struct device_driver *driver)
-{
- struct hv_driver *drv = drv_to_hv_drv(driver);
- struct hv_device *hv_dev = device_to_hv_device(device);
-
- if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b))
- return 1;
-
- return 0;
-}
-
-/*
- * 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);
- const struct hv_vmbus_device_id *dev_id;
-
- dev_id = hv_vmbus_get_id(drv->id_table, dev->dev_type.b);
- if (drv->probe) {
- ret = drv->probe(dev, dev_id);
- if (ret != 0)
- pr_err("probe failed for device %s (%d)\n",
- dev_name(child_device), ret);
-
- } else {
- pr_err("probe not set for driver %s\n",
- dev_name(child_device));
- ret = -ENODEV;
- }
- return ret;
-}
-
-/*
- * vmbus_remove - Remove a vmbus device
- */
-static int vmbus_remove(struct device *child_device)
-{
- struct hv_driver *drv = drv_to_hv_drv(child_device->driver);
- struct hv_device *dev = device_to_hv_device(child_device);
-
- if (drv->remove)
- drv->remove(dev);
- else
- pr_err("remove not set for driver %s\n",
- dev_name(child_device));
-
- return 0;
-}
-
-
-/*
- * vmbus_shutdown - Shutdown a vmbus device
- */
-static void vmbus_shutdown(struct device *child_device)
-{
- struct hv_driver *drv;
- struct hv_device *dev = device_to_hv_device(child_device);
-
-
- /* The device may not be attached yet */
- if (!child_device->driver)
- return;
-
- drv = drv_to_hv_drv(child_device->driver);
-
- if (drv->shutdown)
- drv->shutdown(dev);
-
- return;
-}
-
-
-/*
- * vmbus_device_release - Final callback release of the vmbus child device
- */
-static void vmbus_device_release(struct device *device)
-{
- struct hv_device *hv_dev = device_to_hv_device(device);
-
- kfree(hv_dev);
-
-}
-
-/* The one and only one */
-static struct bus_type hv_bus = {
- .name = "vmbus",
- .match = vmbus_match,
- .shutdown = vmbus_shutdown,
- .remove = vmbus_remove,
- .probe = vmbus_probe,
- .uevent = vmbus_uevent,
- .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);
-}
-
-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
- */
- smp_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);
- }
- }
-}
-
-static irqreturn_t vmbus_isr(int irq, void *dev_id)
-{
- int cpu = smp_processor_id();
- void *page_addr;
- struct hv_message *msg;
- union hv_synic_event_flags *event;
- bool handled = false;
-
- /*
- * Check for events before checking for messages. This is the order
- * in which events and messages are checked in Windows guests on
- * Hyper-V, and the Windows team suggested we do the same.
- */
-
- 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])) {
- handled = true;
- tasklet_schedule(&event_dpc);
- }
-
- 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 processed */
- if (msg->header.message_type != HVMSG_NONE) {
- handled = true;
- tasklet_schedule(&msg_dpc);
- }
-
- if (handled)
- 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(int irq)
-{
- 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);
- return ret;
- }
-
- tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0);
- tasklet_init(&event_dpc, vmbus_on_event, 0);
-
- ret = bus_register(&hv_bus);
- if (ret)
- goto err_cleanup;
-
- ret = request_irq(irq, vmbus_isr, IRQF_SAMPLE_RANDOM,
- driver_name, hv_acpi_dev);
-
- if (ret != 0) {
- pr_err("Unable to request IRQ %d\n",
- irq);
- goto err_unregister;
- }
-
- vector = IRQ0_VECTOR + 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)
- goto err_irq;
-
- vmbus_request_offers();
-
- return 0;
-
-err_irq:
- free_irq(irq, hv_acpi_dev);
-
-err_unregister:
- bus_unregister(&hv_bus);
-
-err_cleanup:
- hv_cleanup();
-
- return ret;
-}
-
-/**
- * __vmbus_child_driver_register - Register a vmbus's driver
- * @drv: Pointer to driver structure you want to register
- * @owner: owner module of the drv
- * @mod_name: module name string
- *
- * 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.
- *
- */
-int __vmbus_driver_register(struct hv_driver *hv_driver, struct module *owner, const char *mod_name)
-{
- int ret;
-
- pr_info("registering driver %s\n", hv_driver->name);
-
- hv_driver->driver.name = hv_driver->name;
- hv_driver->driver.owner = owner;
- hv_driver->driver.mod_name = mod_name;
- hv_driver->driver.bus = &hv_bus;
-
- ret = driver_register(&hv_driver->driver);
-
- vmbus_request_offers();
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(__vmbus_driver_register);
-
-/**
- * vmbus_driver_unregister() - Unregister a vmbus's driver
- * @drv: Pointer to driver structure you want to un-register
- *
- * Un-register the given driver that was previous registered with a call to
- * vmbus_driver_register()
- */
-void vmbus_driver_unregister(struct hv_driver *hv_driver)
-{
- pr_info("unregistering driver %s\n", hv_driver->name);
-
- driver_unregister(&hv_driver->driver);
-
-}
-EXPORT_SYMBOL_GPL(vmbus_driver_unregister);
-
-/*
- * vmbus_device_create - Creates and registers a new child device
- * on the vmbus.
- */
-struct hv_device *vmbus_device_create(uuid_le *type,
- uuid_le *instance,
- struct vmbus_channel *channel)
-{
- struct hv_device *child_device_obj;
-
- 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(uuid_le));
- memcpy(&child_device_obj->dev_instance, instance,
- sizeof(uuid_le));
-
-
- return child_device_obj;
-}
-
-/*
- * vmbus_device_register - Register the child device
- */
-int vmbus_device_register(struct hv_device *child_device_obj)
-{
- int ret = 0;
-
- static atomic_t device_num = ATOMIC_INIT(0);
-
- dev_set_name(&child_device_obj->device, "vmbus_0_%d",
- atomic_inc_return(&device_num));
-
- child_device_obj->device.bus = &hv_bus;
- child_device_obj->device.parent = &hv_acpi_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);
-
- 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_device_unregister - Remove the specified child device
- * from the vmbus.
- */
-void vmbus_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));
-}
-
-
-/*
- * VMBUS is an acpi enumerated device. Get the the IRQ information
- * from DSDT.
- */
-
-static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq)
-{
-
- if (res->type == ACPI_RESOURCE_TYPE_IRQ) {
- struct acpi_resource_irq *irqp;
- irqp = &res->data.irq;
-
- *((unsigned int *)irq) = irqp->interrupts[0];
- }
-
- return AE_OK;
-}
-
-static int vmbus_acpi_add(struct acpi_device *device)
-{
- acpi_status result;
-
- hv_acpi_dev = device;
-
- result = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
- vmbus_walk_resources, &irq);
-
- if (ACPI_FAILURE(result)) {
- complete(&probe_event);
- return -ENODEV;
- }
- complete(&probe_event);
- return 0;
-}
-
-static const struct acpi_device_id vmbus_acpi_device_ids[] = {
- {"VMBUS", 0},
- {"VMBus", 0},
- {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids);
-
-static struct acpi_driver vmbus_acpi_driver = {
- .name = "vmbus",
- .ids = vmbus_acpi_device_ids,
- .ops = {
- .add = vmbus_acpi_add,
- },
-};
-
-static int __init hv_acpi_init(void)
-{
- int ret, t;
-
- init_completion(&probe_event);
-
- /*
- * Get irq resources first.
- */
-
- ret = acpi_bus_register_driver(&vmbus_acpi_driver);
-
- if (ret)
- return ret;
-
- t = wait_for_completion_timeout(&probe_event, 5*HZ);
- if (t == 0) {
- ret = -ETIMEDOUT;
- goto cleanup;
- }
-
- if (irq <= 0) {
- ret = -ENODEV;
- goto cleanup;
- }
-
- ret = vmbus_bus_init(irq);
- if (ret)
- goto cleanup;
-
- return 0;
-
-cleanup:
- acpi_bus_unregister_driver(&vmbus_acpi_driver);
- return ret;
-}
-
-
-MODULE_LICENSE("GPL");
-MODULE_VERSION(HV_DRV_VERSION);
-module_param(vmbus_loglevel, int, S_IRUGO|S_IWUSR);
-
-module_init(hv_acpi_init);
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