2 * Copyright (c) 2009, Microsoft Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
18 * Haiyang Zhang <haiyangz@microsoft.com>
19 * Hank Janssen <hjanssen@microsoft.com>
20 * K. Y. Srinivasan <kys@microsoft.com>
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/device.h>
28 #include <linux/irq.h>
29 #include <linux/interrupt.h>
30 #include <linux/sysctl.h>
31 #include <linux/slab.h>
32 #include <linux/acpi.h>
33 #include <acpi/acpi_bus.h>
34 #include <linux/completion.h>
35 #include <linux/hyperv.h>
37 #include "hyperv_vmbus.h"
40 static struct acpi_device
*hv_acpi_dev
;
42 static struct tasklet_struct msg_dpc
;
43 static struct tasklet_struct event_dpc
;
45 unsigned int vmbus_loglevel
= (ALL_MODULES
<< 16 | INFO_LVL
);
46 EXPORT_SYMBOL(vmbus_loglevel
);
48 static struct completion probe_event
;
51 static void get_channel_info(struct hv_device
*device
,
52 struct hv_device_info
*info
)
54 struct vmbus_channel_debug_info debug_info
;
59 vmbus_get_debug_info(device
->channel
, &debug_info
);
61 info
->chn_id
= debug_info
.relid
;
62 info
->chn_state
= debug_info
.state
;
63 memcpy(&info
->chn_type
, &debug_info
.interfacetype
,
65 memcpy(&info
->chn_instance
, &debug_info
.interface_instance
,
68 info
->monitor_id
= debug_info
.monitorid
;
70 info
->server_monitor_pending
= debug_info
.servermonitor_pending
;
71 info
->server_monitor_latency
= debug_info
.servermonitor_latency
;
72 info
->server_monitor_conn_id
= debug_info
.servermonitor_connectionid
;
74 info
->client_monitor_pending
= debug_info
.clientmonitor_pending
;
75 info
->client_monitor_latency
= debug_info
.clientmonitor_latency
;
76 info
->client_monitor_conn_id
= debug_info
.clientmonitor_connectionid
;
78 info
->inbound
.int_mask
= debug_info
.inbound
.current_interrupt_mask
;
79 info
->inbound
.read_idx
= debug_info
.inbound
.current_read_index
;
80 info
->inbound
.write_idx
= debug_info
.inbound
.current_write_index
;
81 info
->inbound
.bytes_avail_toread
=
82 debug_info
.inbound
.bytes_avail_toread
;
83 info
->inbound
.bytes_avail_towrite
=
84 debug_info
.inbound
.bytes_avail_towrite
;
86 info
->outbound
.int_mask
=
87 debug_info
.outbound
.current_interrupt_mask
;
88 info
->outbound
.read_idx
= debug_info
.outbound
.current_read_index
;
89 info
->outbound
.write_idx
= debug_info
.outbound
.current_write_index
;
90 info
->outbound
.bytes_avail_toread
=
91 debug_info
.outbound
.bytes_avail_toread
;
92 info
->outbound
.bytes_avail_towrite
=
93 debug_info
.outbound
.bytes_avail_towrite
;
96 #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2)
97 static void print_alias_name(struct hv_device
*hv_dev
, char *alias_name
)
100 for (i
= 0; i
< VMBUS_ALIAS_LEN
; i
+= 2)
101 sprintf(&alias_name
[i
], "%02x", hv_dev
->dev_type
.b
[i
/2]);
105 * vmbus_show_device_attr - Show the device attribute in sysfs.
107 * This is invoked when user does a
108 * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>"
110 static ssize_t
vmbus_show_device_attr(struct device
*dev
,
111 struct device_attribute
*dev_attr
,
114 struct hv_device
*hv_dev
= device_to_hv_device(dev
);
115 struct hv_device_info
*device_info
;
116 char alias_name
[VMBUS_ALIAS_LEN
+ 1];
119 device_info
= kzalloc(sizeof(struct hv_device_info
), GFP_KERNEL
);
123 get_channel_info(hv_dev
, device_info
);
125 if (!strcmp(dev_attr
->attr
.name
, "class_id")) {
126 ret
= sprintf(buf
, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
127 "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
128 device_info
->chn_type
.b
[3],
129 device_info
->chn_type
.b
[2],
130 device_info
->chn_type
.b
[1],
131 device_info
->chn_type
.b
[0],
132 device_info
->chn_type
.b
[5],
133 device_info
->chn_type
.b
[4],
134 device_info
->chn_type
.b
[7],
135 device_info
->chn_type
.b
[6],
136 device_info
->chn_type
.b
[8],
137 device_info
->chn_type
.b
[9],
138 device_info
->chn_type
.b
[10],
139 device_info
->chn_type
.b
[11],
140 device_info
->chn_type
.b
[12],
141 device_info
->chn_type
.b
[13],
142 device_info
->chn_type
.b
[14],
143 device_info
->chn_type
.b
[15]);
144 } else if (!strcmp(dev_attr
->attr
.name
, "device_id")) {
145 ret
= sprintf(buf
, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
146 "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
147 device_info
->chn_instance
.b
[3],
148 device_info
->chn_instance
.b
[2],
149 device_info
->chn_instance
.b
[1],
150 device_info
->chn_instance
.b
[0],
151 device_info
->chn_instance
.b
[5],
152 device_info
->chn_instance
.b
[4],
153 device_info
->chn_instance
.b
[7],
154 device_info
->chn_instance
.b
[6],
155 device_info
->chn_instance
.b
[8],
156 device_info
->chn_instance
.b
[9],
157 device_info
->chn_instance
.b
[10],
158 device_info
->chn_instance
.b
[11],
159 device_info
->chn_instance
.b
[12],
160 device_info
->chn_instance
.b
[13],
161 device_info
->chn_instance
.b
[14],
162 device_info
->chn_instance
.b
[15]);
163 } else if (!strcmp(dev_attr
->attr
.name
, "modalias")) {
164 print_alias_name(hv_dev
, alias_name
);
165 ret
= sprintf(buf
, "vmbus:%s\n", alias_name
);
166 } else if (!strcmp(dev_attr
->attr
.name
, "state")) {
167 ret
= sprintf(buf
, "%d\n", device_info
->chn_state
);
168 } else if (!strcmp(dev_attr
->attr
.name
, "id")) {
169 ret
= sprintf(buf
, "%d\n", device_info
->chn_id
);
170 } else if (!strcmp(dev_attr
->attr
.name
, "out_intr_mask")) {
171 ret
= sprintf(buf
, "%d\n", device_info
->outbound
.int_mask
);
172 } else if (!strcmp(dev_attr
->attr
.name
, "out_read_index")) {
173 ret
= sprintf(buf
, "%d\n", device_info
->outbound
.read_idx
);
174 } else if (!strcmp(dev_attr
->attr
.name
, "out_write_index")) {
175 ret
= sprintf(buf
, "%d\n", device_info
->outbound
.write_idx
);
176 } else if (!strcmp(dev_attr
->attr
.name
, "out_read_bytes_avail")) {
177 ret
= sprintf(buf
, "%d\n",
178 device_info
->outbound
.bytes_avail_toread
);
179 } else if (!strcmp(dev_attr
->attr
.name
, "out_write_bytes_avail")) {
180 ret
= sprintf(buf
, "%d\n",
181 device_info
->outbound
.bytes_avail_towrite
);
182 } else if (!strcmp(dev_attr
->attr
.name
, "in_intr_mask")) {
183 ret
= sprintf(buf
, "%d\n", device_info
->inbound
.int_mask
);
184 } else if (!strcmp(dev_attr
->attr
.name
, "in_read_index")) {
185 ret
= sprintf(buf
, "%d\n", device_info
->inbound
.read_idx
);
186 } else if (!strcmp(dev_attr
->attr
.name
, "in_write_index")) {
187 ret
= sprintf(buf
, "%d\n", device_info
->inbound
.write_idx
);
188 } else if (!strcmp(dev_attr
->attr
.name
, "in_read_bytes_avail")) {
189 ret
= sprintf(buf
, "%d\n",
190 device_info
->inbound
.bytes_avail_toread
);
191 } else if (!strcmp(dev_attr
->attr
.name
, "in_write_bytes_avail")) {
192 ret
= sprintf(buf
, "%d\n",
193 device_info
->inbound
.bytes_avail_towrite
);
194 } else if (!strcmp(dev_attr
->attr
.name
, "monitor_id")) {
195 ret
= sprintf(buf
, "%d\n", device_info
->monitor_id
);
196 } else if (!strcmp(dev_attr
->attr
.name
, "server_monitor_pending")) {
197 ret
= sprintf(buf
, "%d\n", device_info
->server_monitor_pending
);
198 } else if (!strcmp(dev_attr
->attr
.name
, "server_monitor_latency")) {
199 ret
= sprintf(buf
, "%d\n", device_info
->server_monitor_latency
);
200 } else if (!strcmp(dev_attr
->attr
.name
, "server_monitor_conn_id")) {
201 ret
= sprintf(buf
, "%d\n",
202 device_info
->server_monitor_conn_id
);
203 } else if (!strcmp(dev_attr
->attr
.name
, "client_monitor_pending")) {
204 ret
= sprintf(buf
, "%d\n", device_info
->client_monitor_pending
);
205 } else if (!strcmp(dev_attr
->attr
.name
, "client_monitor_latency")) {
206 ret
= sprintf(buf
, "%d\n", device_info
->client_monitor_latency
);
207 } else if (!strcmp(dev_attr
->attr
.name
, "client_monitor_conn_id")) {
208 ret
= sprintf(buf
, "%d\n",
209 device_info
->client_monitor_conn_id
);
216 /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
217 static struct device_attribute vmbus_device_attrs
[] = {
218 __ATTR(id
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
219 __ATTR(state
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
220 __ATTR(class_id
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
221 __ATTR(device_id
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
222 __ATTR(monitor_id
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
223 __ATTR(modalias
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
225 __ATTR(server_monitor_pending
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
226 __ATTR(server_monitor_latency
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
227 __ATTR(server_monitor_conn_id
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
229 __ATTR(client_monitor_pending
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
230 __ATTR(client_monitor_latency
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
231 __ATTR(client_monitor_conn_id
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
233 __ATTR(out_intr_mask
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
234 __ATTR(out_read_index
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
235 __ATTR(out_write_index
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
236 __ATTR(out_read_bytes_avail
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
237 __ATTR(out_write_bytes_avail
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
239 __ATTR(in_intr_mask
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
240 __ATTR(in_read_index
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
241 __ATTR(in_write_index
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
242 __ATTR(in_read_bytes_avail
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
243 __ATTR(in_write_bytes_avail
, S_IRUGO
, vmbus_show_device_attr
, NULL
),
249 * vmbus_uevent - add uevent for our device
251 * This routine is invoked when a device is added or removed on the vmbus to
252 * generate a uevent to udev in the userspace. The udev will then look at its
253 * rule and the uevent generated here to load the appropriate driver
255 * The alias string will be of the form vmbus:guid where guid is the string
256 * representation of the device guid (each byte of the guid will be
257 * represented with two hex characters.
259 static int vmbus_uevent(struct device
*device
, struct kobj_uevent_env
*env
)
261 struct hv_device
*dev
= device_to_hv_device(device
);
263 char alias_name
[VMBUS_ALIAS_LEN
+ 1];
265 print_alias_name(dev
, alias_name
);
266 ret
= add_uevent_var(env
, "MODALIAS=vmbus:%s", alias_name
);
270 static uuid_le null_guid
;
272 static inline bool is_null_guid(const __u8
*guid
)
274 if (memcmp(guid
, &null_guid
, sizeof(uuid_le
)))
280 * Return a matching hv_vmbus_device_id pointer.
281 * If there is no match, return NULL.
283 static const struct hv_vmbus_device_id
*hv_vmbus_get_id(
284 const struct hv_vmbus_device_id
*id
,
287 for (; !is_null_guid(id
->guid
); id
++)
288 if (!memcmp(&id
->guid
, guid
, sizeof(uuid_le
)))
297 * vmbus_match - Attempt to match the specified device to the specified driver
299 static int vmbus_match(struct device
*device
, struct device_driver
*driver
)
301 struct hv_driver
*drv
= drv_to_hv_drv(driver
);
302 struct hv_device
*hv_dev
= device_to_hv_device(device
);
304 if (hv_vmbus_get_id(drv
->id_table
, hv_dev
->dev_type
.b
))
311 * vmbus_probe - Add the new vmbus's child device
313 static int vmbus_probe(struct device
*child_device
)
316 struct hv_driver
*drv
=
317 drv_to_hv_drv(child_device
->driver
);
318 struct hv_device
*dev
= device_to_hv_device(child_device
);
319 const struct hv_vmbus_device_id
*dev_id
;
321 dev_id
= hv_vmbus_get_id(drv
->id_table
, dev
->dev_type
.b
);
323 ret
= drv
->probe(dev
, dev_id
);
325 pr_err("probe failed for device %s (%d)\n",
326 dev_name(child_device
), ret
);
329 pr_err("probe not set for driver %s\n",
330 dev_name(child_device
));
337 * vmbus_remove - Remove a vmbus device
339 static int vmbus_remove(struct device
*child_device
)
341 struct hv_driver
*drv
= drv_to_hv_drv(child_device
->driver
);
342 struct hv_device
*dev
= device_to_hv_device(child_device
);
347 pr_err("remove not set for driver %s\n",
348 dev_name(child_device
));
355 * vmbus_shutdown - Shutdown a vmbus device
357 static void vmbus_shutdown(struct device
*child_device
)
359 struct hv_driver
*drv
;
360 struct hv_device
*dev
= device_to_hv_device(child_device
);
363 /* The device may not be attached yet */
364 if (!child_device
->driver
)
367 drv
= drv_to_hv_drv(child_device
->driver
);
377 * vmbus_device_release - Final callback release of the vmbus child device
379 static void vmbus_device_release(struct device
*device
)
381 struct hv_device
*hv_dev
= device_to_hv_device(device
);
387 /* The one and only one */
388 static struct bus_type hv_bus
= {
390 .match
= vmbus_match
,
391 .shutdown
= vmbus_shutdown
,
392 .remove
= vmbus_remove
,
393 .probe
= vmbus_probe
,
394 .uevent
= vmbus_uevent
,
395 .dev_attrs
= vmbus_device_attrs
,
398 static const char *driver_name
= "hyperv";
401 struct onmessage_work_context
{
402 struct work_struct work
;
403 struct hv_message msg
;
406 static void vmbus_onmessage_work(struct work_struct
*work
)
408 struct onmessage_work_context
*ctx
;
410 ctx
= container_of(work
, struct onmessage_work_context
,
412 vmbus_onmessage(&ctx
->msg
);
416 static void vmbus_on_msg_dpc(unsigned long data
)
418 int cpu
= smp_processor_id();
419 void *page_addr
= hv_context
.synic_message_page
[cpu
];
420 struct hv_message
*msg
= (struct hv_message
*)page_addr
+
422 struct onmessage_work_context
*ctx
;
425 if (msg
->header
.message_type
== HVMSG_NONE
) {
429 ctx
= kmalloc(sizeof(*ctx
), GFP_ATOMIC
);
432 INIT_WORK(&ctx
->work
, vmbus_onmessage_work
);
433 memcpy(&ctx
->msg
, msg
, sizeof(*msg
));
434 queue_work(vmbus_connection
.work_queue
, &ctx
->work
);
437 msg
->header
.message_type
= HVMSG_NONE
;
440 * Make sure the write to MessageType (ie set to
441 * HVMSG_NONE) happens before we read the
442 * MessagePending and EOMing. Otherwise, the EOMing
443 * will not deliver any more messages since there is
448 if (msg
->header
.message_flags
.msg_pending
) {
450 * This will cause message queue rescan to
451 * possibly deliver another msg from the
454 wrmsrl(HV_X64_MSR_EOM
, 0);
459 static irqreturn_t
vmbus_isr(int irq
, void *dev_id
)
461 int cpu
= smp_processor_id();
463 struct hv_message
*msg
;
464 union hv_synic_event_flags
*event
;
465 bool handled
= false;
468 * Check for events before checking for messages. This is the order
469 * in which events and messages are checked in Windows guests on
470 * Hyper-V, and the Windows team suggested we do the same.
473 page_addr
= hv_context
.synic_event_page
[cpu
];
474 event
= (union hv_synic_event_flags
*)page_addr
+ VMBUS_MESSAGE_SINT
;
476 /* Since we are a child, we only need to check bit 0 */
477 if (sync_test_and_clear_bit(0, (unsigned long *) &event
->flags32
[0])) {
479 tasklet_schedule(&event_dpc
);
482 page_addr
= hv_context
.synic_message_page
[cpu
];
483 msg
= (struct hv_message
*)page_addr
+ VMBUS_MESSAGE_SINT
;
485 /* Check if there are actual msgs to be processed */
486 if (msg
->header
.message_type
!= HVMSG_NONE
) {
488 tasklet_schedule(&msg_dpc
);
498 * vmbus_bus_init -Main vmbus driver initialization routine.
501 * - initialize the vmbus driver context
502 * - invoke the vmbus hv main init routine
503 * - get the irq resource
504 * - retrieve the channel offers
506 static int vmbus_bus_init(int irq
)
511 /* Hypervisor initialization...setup hypercall page..etc */
514 pr_err("Unable to initialize the hypervisor - 0x%x\n", ret
);
518 tasklet_init(&msg_dpc
, vmbus_on_msg_dpc
, 0);
519 tasklet_init(&event_dpc
, vmbus_on_event
, 0);
521 ret
= bus_register(&hv_bus
);
525 ret
= request_irq(irq
, vmbus_isr
, IRQF_SAMPLE_RANDOM
,
526 driver_name
, hv_acpi_dev
);
529 pr_err("Unable to request IRQ %d\n",
534 vector
= IRQ0_VECTOR
+ irq
;
537 * Notify the hypervisor of our irq and
538 * connect to the host.
540 on_each_cpu(hv_synic_init
, (void *)&vector
, 1);
541 ret
= vmbus_connect();
545 vmbus_request_offers();
550 free_irq(irq
, hv_acpi_dev
);
553 bus_unregister(&hv_bus
);
562 * __vmbus_child_driver_register - Register a vmbus's driver
563 * @drv: Pointer to driver structure you want to register
564 * @owner: owner module of the drv
565 * @mod_name: module name string
567 * Registers the given driver with Linux through the 'driver_register()' call
568 * and sets up the hyper-v vmbus handling for this driver.
569 * It will return the state of the 'driver_register()' call.
572 int __vmbus_driver_register(struct hv_driver
*hv_driver
, struct module
*owner
, const char *mod_name
)
576 pr_info("registering driver %s\n", hv_driver
->name
);
578 hv_driver
->driver
.name
= hv_driver
->name
;
579 hv_driver
->driver
.owner
= owner
;
580 hv_driver
->driver
.mod_name
= mod_name
;
581 hv_driver
->driver
.bus
= &hv_bus
;
583 ret
= driver_register(&hv_driver
->driver
);
585 vmbus_request_offers();
589 EXPORT_SYMBOL_GPL(__vmbus_driver_register
);
592 * vmbus_driver_unregister() - Unregister a vmbus's driver
593 * @drv: Pointer to driver structure you want to un-register
595 * Un-register the given driver that was previous registered with a call to
596 * vmbus_driver_register()
598 void vmbus_driver_unregister(struct hv_driver
*hv_driver
)
600 pr_info("unregistering driver %s\n", hv_driver
->name
);
602 driver_unregister(&hv_driver
->driver
);
605 EXPORT_SYMBOL_GPL(vmbus_driver_unregister
);
608 * vmbus_device_create - Creates and registers a new child device
611 struct hv_device
*vmbus_device_create(uuid_le
*type
,
613 struct vmbus_channel
*channel
)
615 struct hv_device
*child_device_obj
;
617 child_device_obj
= kzalloc(sizeof(struct hv_device
), GFP_KERNEL
);
618 if (!child_device_obj
) {
619 pr_err("Unable to allocate device object for child device\n");
623 child_device_obj
->channel
= channel
;
624 memcpy(&child_device_obj
->dev_type
, type
, sizeof(uuid_le
));
625 memcpy(&child_device_obj
->dev_instance
, instance
,
629 return child_device_obj
;
633 * vmbus_device_register - Register the child device
635 int vmbus_device_register(struct hv_device
*child_device_obj
)
639 static atomic_t device_num
= ATOMIC_INIT(0);
641 dev_set_name(&child_device_obj
->device
, "vmbus_0_%d",
642 atomic_inc_return(&device_num
));
644 child_device_obj
->device
.bus
= &hv_bus
;
645 child_device_obj
->device
.parent
= &hv_acpi_dev
->dev
;
646 child_device_obj
->device
.release
= vmbus_device_release
;
649 * Register with the LDM. This will kick off the driver/device
650 * binding...which will eventually call vmbus_match() and vmbus_probe()
652 ret
= device_register(&child_device_obj
->device
);
655 pr_err("Unable to register child device\n");
657 pr_info("child device %s registered\n",
658 dev_name(&child_device_obj
->device
));
664 * vmbus_device_unregister - Remove the specified child device
667 void vmbus_device_unregister(struct hv_device
*device_obj
)
670 * Kick off the process of unregistering the device.
671 * This will call vmbus_remove() and eventually vmbus_device_release()
673 device_unregister(&device_obj
->device
);
675 pr_info("child device %s unregistered\n",
676 dev_name(&device_obj
->device
));
681 * VMBUS is an acpi enumerated device. Get the the IRQ information
685 static acpi_status
vmbus_walk_resources(struct acpi_resource
*res
, void *irq
)
688 if (res
->type
== ACPI_RESOURCE_TYPE_IRQ
) {
689 struct acpi_resource_irq
*irqp
;
690 irqp
= &res
->data
.irq
;
692 *((unsigned int *)irq
) = irqp
->interrupts
[0];
698 static int vmbus_acpi_add(struct acpi_device
*device
)
702 hv_acpi_dev
= device
;
704 result
= acpi_walk_resources(device
->handle
, METHOD_NAME__CRS
,
705 vmbus_walk_resources
, &irq
);
707 if (ACPI_FAILURE(result
)) {
708 complete(&probe_event
);
711 complete(&probe_event
);
715 static const struct acpi_device_id vmbus_acpi_device_ids
[] = {
720 MODULE_DEVICE_TABLE(acpi
, vmbus_acpi_device_ids
);
722 static struct acpi_driver vmbus_acpi_driver
= {
724 .ids
= vmbus_acpi_device_ids
,
726 .add
= vmbus_acpi_add
,
730 static int __init
hv_acpi_init(void)
734 init_completion(&probe_event
);
737 * Get irq resources first.
740 ret
= acpi_bus_register_driver(&vmbus_acpi_driver
);
745 t
= wait_for_completion_timeout(&probe_event
, 5*HZ
);
756 ret
= vmbus_bus_init(irq
);
763 acpi_bus_unregister_driver(&vmbus_acpi_driver
);
768 MODULE_LICENSE("GPL");
769 MODULE_VERSION(HV_DRV_VERSION
);
770 module_param(vmbus_loglevel
, int, S_IRUGO
|S_IWUSR
);
772 module_init(hv_acpi_init
);