Commit | Line | Data |
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3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
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. | |
7 | * | |
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 | |
11 | * more details. | |
12 | * | |
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. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
b0069f43 | 20 | * K. Y. Srinivasan <kys@microsoft.com> |
52e5c1ce | 21 | * |
3e7ee490 | 22 | */ |
0a46618d HJ |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
3e7ee490 HJ |
25 | #include <linux/init.h> |
26 | #include <linux/module.h> | |
27 | #include <linux/device.h> | |
3e7ee490 HJ |
28 | #include <linux/interrupt.h> |
29 | #include <linux/sysctl.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
b0069f43 | 31 | #include <linux/acpi.h> |
8b5d6d3b | 32 | #include <linux/completion.h> |
46a97191 | 33 | #include <linux/hyperv.h> |
b0209501 | 34 | #include <linux/kernel_stat.h> |
4061ed9e | 35 | #include <linux/clockchips.h> |
e513229b | 36 | #include <linux/cpu.h> |
407dd164 | 37 | #include <asm/hyperv.h> |
1f94ea81 | 38 | #include <asm/hypervisor.h> |
302a3c0f | 39 | #include <asm/mshyperv.h> |
0f2a6619 | 40 | #include "hyperv_vmbus.h" |
3e7ee490 | 41 | |
607c1a11 | 42 | static struct acpi_device *hv_acpi_dev; |
1168ac22 | 43 | |
59c0e4f0 | 44 | static struct tasklet_struct msg_dpc; |
71a6655d | 45 | static struct completion probe_event; |
b0069f43 | 46 | static int irq; |
98db4335 | 47 | |
90eedf0c GH |
48 | struct resource hyperv_mmio = { |
49 | .name = "hyperv mmio", | |
50 | .flags = IORESOURCE_MEM, | |
51 | }; | |
52 | EXPORT_SYMBOL_GPL(hyperv_mmio); | |
98db4335 | 53 | |
cf6a2eac S |
54 | static int vmbus_exists(void) |
55 | { | |
56 | if (hv_acpi_dev == NULL) | |
57 | return -ENODEV; | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
fd776ba9 OH |
62 | #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2) |
63 | static void print_alias_name(struct hv_device *hv_dev, char *alias_name) | |
64 | { | |
65 | int i; | |
66 | for (i = 0; i < VMBUS_ALIAS_LEN; i += 2) | |
67 | sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]); | |
68 | } | |
69 | ||
76c52bbe GKH |
70 | static u8 channel_monitor_group(struct vmbus_channel *channel) |
71 | { | |
72 | return (u8)channel->offermsg.monitorid / 32; | |
73 | } | |
74 | ||
75 | static u8 channel_monitor_offset(struct vmbus_channel *channel) | |
76 | { | |
77 | return (u8)channel->offermsg.monitorid % 32; | |
78 | } | |
79 | ||
80 | static u32 channel_pending(struct vmbus_channel *channel, | |
81 | struct hv_monitor_page *monitor_page) | |
82 | { | |
83 | u8 monitor_group = channel_monitor_group(channel); | |
84 | return monitor_page->trigger_group[monitor_group].pending; | |
85 | } | |
86 | ||
1cee272b GKH |
87 | static u32 channel_latency(struct vmbus_channel *channel, |
88 | struct hv_monitor_page *monitor_page) | |
89 | { | |
90 | u8 monitor_group = channel_monitor_group(channel); | |
91 | u8 monitor_offset = channel_monitor_offset(channel); | |
92 | return monitor_page->latency[monitor_group][monitor_offset]; | |
93 | } | |
94 | ||
4947c745 GKH |
95 | static u32 channel_conn_id(struct vmbus_channel *channel, |
96 | struct hv_monitor_page *monitor_page) | |
97 | { | |
98 | u8 monitor_group = channel_monitor_group(channel); | |
99 | u8 monitor_offset = channel_monitor_offset(channel); | |
100 | return monitor_page->parameter[monitor_group][monitor_offset].connectionid.u.id; | |
101 | } | |
102 | ||
03f3a910 GKH |
103 | static ssize_t id_show(struct device *dev, struct device_attribute *dev_attr, |
104 | char *buf) | |
105 | { | |
106 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
107 | ||
108 | if (!hv_dev->channel) | |
109 | return -ENODEV; | |
110 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.child_relid); | |
111 | } | |
112 | static DEVICE_ATTR_RO(id); | |
113 | ||
a8fb5f3d GKH |
114 | static ssize_t state_show(struct device *dev, struct device_attribute *dev_attr, |
115 | char *buf) | |
116 | { | |
117 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
118 | ||
119 | if (!hv_dev->channel) | |
120 | return -ENODEV; | |
121 | return sprintf(buf, "%d\n", hv_dev->channel->state); | |
122 | } | |
123 | static DEVICE_ATTR_RO(state); | |
124 | ||
5ffd00e2 GKH |
125 | static ssize_t monitor_id_show(struct device *dev, |
126 | struct device_attribute *dev_attr, char *buf) | |
127 | { | |
128 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
129 | ||
130 | if (!hv_dev->channel) | |
131 | return -ENODEV; | |
132 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.monitorid); | |
133 | } | |
134 | static DEVICE_ATTR_RO(monitor_id); | |
135 | ||
68234c04 GKH |
136 | static ssize_t class_id_show(struct device *dev, |
137 | struct device_attribute *dev_attr, char *buf) | |
138 | { | |
139 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
140 | ||
141 | if (!hv_dev->channel) | |
142 | return -ENODEV; | |
143 | return sprintf(buf, "{%pUl}\n", | |
144 | hv_dev->channel->offermsg.offer.if_type.b); | |
145 | } | |
146 | static DEVICE_ATTR_RO(class_id); | |
147 | ||
7c55e1d0 GKH |
148 | static ssize_t device_id_show(struct device *dev, |
149 | struct device_attribute *dev_attr, char *buf) | |
150 | { | |
151 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
152 | ||
153 | if (!hv_dev->channel) | |
154 | return -ENODEV; | |
155 | return sprintf(buf, "{%pUl}\n", | |
156 | hv_dev->channel->offermsg.offer.if_instance.b); | |
157 | } | |
158 | static DEVICE_ATTR_RO(device_id); | |
159 | ||
647fa371 GKH |
160 | static ssize_t modalias_show(struct device *dev, |
161 | struct device_attribute *dev_attr, char *buf) | |
162 | { | |
163 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
164 | char alias_name[VMBUS_ALIAS_LEN + 1]; | |
165 | ||
166 | print_alias_name(hv_dev, alias_name); | |
167 | return sprintf(buf, "vmbus:%s\n", alias_name); | |
168 | } | |
169 | static DEVICE_ATTR_RO(modalias); | |
170 | ||
76c52bbe GKH |
171 | static ssize_t server_monitor_pending_show(struct device *dev, |
172 | struct device_attribute *dev_attr, | |
173 | char *buf) | |
174 | { | |
175 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
176 | ||
177 | if (!hv_dev->channel) | |
178 | return -ENODEV; | |
179 | return sprintf(buf, "%d\n", | |
180 | channel_pending(hv_dev->channel, | |
181 | vmbus_connection.monitor_pages[1])); | |
182 | } | |
183 | static DEVICE_ATTR_RO(server_monitor_pending); | |
184 | ||
185 | static ssize_t client_monitor_pending_show(struct device *dev, | |
186 | struct device_attribute *dev_attr, | |
187 | char *buf) | |
188 | { | |
189 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
190 | ||
191 | if (!hv_dev->channel) | |
192 | return -ENODEV; | |
193 | return sprintf(buf, "%d\n", | |
194 | channel_pending(hv_dev->channel, | |
195 | vmbus_connection.monitor_pages[1])); | |
196 | } | |
197 | static DEVICE_ATTR_RO(client_monitor_pending); | |
68234c04 | 198 | |
1cee272b GKH |
199 | static ssize_t server_monitor_latency_show(struct device *dev, |
200 | struct device_attribute *dev_attr, | |
201 | char *buf) | |
202 | { | |
203 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
204 | ||
205 | if (!hv_dev->channel) | |
206 | return -ENODEV; | |
207 | return sprintf(buf, "%d\n", | |
208 | channel_latency(hv_dev->channel, | |
209 | vmbus_connection.monitor_pages[0])); | |
210 | } | |
211 | static DEVICE_ATTR_RO(server_monitor_latency); | |
212 | ||
213 | static ssize_t client_monitor_latency_show(struct device *dev, | |
214 | struct device_attribute *dev_attr, | |
215 | char *buf) | |
216 | { | |
217 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
218 | ||
219 | if (!hv_dev->channel) | |
220 | return -ENODEV; | |
221 | return sprintf(buf, "%d\n", | |
222 | channel_latency(hv_dev->channel, | |
223 | vmbus_connection.monitor_pages[1])); | |
224 | } | |
225 | static DEVICE_ATTR_RO(client_monitor_latency); | |
226 | ||
4947c745 GKH |
227 | static ssize_t server_monitor_conn_id_show(struct device *dev, |
228 | struct device_attribute *dev_attr, | |
229 | char *buf) | |
230 | { | |
231 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
232 | ||
233 | if (!hv_dev->channel) | |
234 | return -ENODEV; | |
235 | return sprintf(buf, "%d\n", | |
236 | channel_conn_id(hv_dev->channel, | |
237 | vmbus_connection.monitor_pages[0])); | |
238 | } | |
239 | static DEVICE_ATTR_RO(server_monitor_conn_id); | |
240 | ||
241 | static ssize_t client_monitor_conn_id_show(struct device *dev, | |
242 | struct device_attribute *dev_attr, | |
243 | char *buf) | |
244 | { | |
245 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
246 | ||
247 | if (!hv_dev->channel) | |
248 | return -ENODEV; | |
249 | return sprintf(buf, "%d\n", | |
250 | channel_conn_id(hv_dev->channel, | |
251 | vmbus_connection.monitor_pages[1])); | |
252 | } | |
253 | static DEVICE_ATTR_RO(client_monitor_conn_id); | |
254 | ||
98f4c651 GKH |
255 | static ssize_t out_intr_mask_show(struct device *dev, |
256 | struct device_attribute *dev_attr, char *buf) | |
257 | { | |
258 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
259 | struct hv_ring_buffer_debug_info outbound; | |
260 | ||
261 | if (!hv_dev->channel) | |
262 | return -ENODEV; | |
263 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
264 | return sprintf(buf, "%d\n", outbound.current_interrupt_mask); | |
265 | } | |
266 | static DEVICE_ATTR_RO(out_intr_mask); | |
267 | ||
268 | static ssize_t out_read_index_show(struct device *dev, | |
269 | struct device_attribute *dev_attr, char *buf) | |
270 | { | |
271 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
272 | struct hv_ring_buffer_debug_info outbound; | |
273 | ||
274 | if (!hv_dev->channel) | |
275 | return -ENODEV; | |
276 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
277 | return sprintf(buf, "%d\n", outbound.current_read_index); | |
278 | } | |
279 | static DEVICE_ATTR_RO(out_read_index); | |
280 | ||
281 | static ssize_t out_write_index_show(struct device *dev, | |
282 | struct device_attribute *dev_attr, | |
283 | char *buf) | |
284 | { | |
285 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
286 | struct hv_ring_buffer_debug_info outbound; | |
287 | ||
288 | if (!hv_dev->channel) | |
289 | return -ENODEV; | |
290 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
291 | return sprintf(buf, "%d\n", outbound.current_write_index); | |
292 | } | |
293 | static DEVICE_ATTR_RO(out_write_index); | |
294 | ||
295 | static ssize_t out_read_bytes_avail_show(struct device *dev, | |
296 | struct device_attribute *dev_attr, | |
297 | char *buf) | |
298 | { | |
299 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
300 | struct hv_ring_buffer_debug_info outbound; | |
301 | ||
302 | if (!hv_dev->channel) | |
303 | return -ENODEV; | |
304 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
305 | return sprintf(buf, "%d\n", outbound.bytes_avail_toread); | |
306 | } | |
307 | static DEVICE_ATTR_RO(out_read_bytes_avail); | |
308 | ||
309 | static ssize_t out_write_bytes_avail_show(struct device *dev, | |
310 | struct device_attribute *dev_attr, | |
311 | char *buf) | |
312 | { | |
313 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
314 | struct hv_ring_buffer_debug_info outbound; | |
315 | ||
316 | if (!hv_dev->channel) | |
317 | return -ENODEV; | |
318 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); | |
319 | return sprintf(buf, "%d\n", outbound.bytes_avail_towrite); | |
320 | } | |
321 | static DEVICE_ATTR_RO(out_write_bytes_avail); | |
322 | ||
323 | static ssize_t in_intr_mask_show(struct device *dev, | |
324 | struct device_attribute *dev_attr, char *buf) | |
325 | { | |
326 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
327 | struct hv_ring_buffer_debug_info inbound; | |
328 | ||
329 | if (!hv_dev->channel) | |
330 | return -ENODEV; | |
331 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
332 | return sprintf(buf, "%d\n", inbound.current_interrupt_mask); | |
333 | } | |
334 | static DEVICE_ATTR_RO(in_intr_mask); | |
335 | ||
336 | static ssize_t in_read_index_show(struct device *dev, | |
337 | struct device_attribute *dev_attr, char *buf) | |
338 | { | |
339 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
340 | struct hv_ring_buffer_debug_info inbound; | |
341 | ||
342 | if (!hv_dev->channel) | |
343 | return -ENODEV; | |
344 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
345 | return sprintf(buf, "%d\n", inbound.current_read_index); | |
346 | } | |
347 | static DEVICE_ATTR_RO(in_read_index); | |
348 | ||
349 | static ssize_t in_write_index_show(struct device *dev, | |
350 | struct device_attribute *dev_attr, char *buf) | |
351 | { | |
352 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
353 | struct hv_ring_buffer_debug_info inbound; | |
354 | ||
355 | if (!hv_dev->channel) | |
356 | return -ENODEV; | |
357 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
358 | return sprintf(buf, "%d\n", inbound.current_write_index); | |
359 | } | |
360 | static DEVICE_ATTR_RO(in_write_index); | |
361 | ||
362 | static ssize_t in_read_bytes_avail_show(struct device *dev, | |
363 | struct device_attribute *dev_attr, | |
364 | char *buf) | |
365 | { | |
366 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
367 | struct hv_ring_buffer_debug_info inbound; | |
368 | ||
369 | if (!hv_dev->channel) | |
370 | return -ENODEV; | |
371 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
372 | return sprintf(buf, "%d\n", inbound.bytes_avail_toread); | |
373 | } | |
374 | static DEVICE_ATTR_RO(in_read_bytes_avail); | |
375 | ||
376 | static ssize_t in_write_bytes_avail_show(struct device *dev, | |
377 | struct device_attribute *dev_attr, | |
378 | char *buf) | |
379 | { | |
380 | struct hv_device *hv_dev = device_to_hv_device(dev); | |
381 | struct hv_ring_buffer_debug_info inbound; | |
382 | ||
383 | if (!hv_dev->channel) | |
384 | return -ENODEV; | |
385 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); | |
386 | return sprintf(buf, "%d\n", inbound.bytes_avail_towrite); | |
387 | } | |
388 | static DEVICE_ATTR_RO(in_write_bytes_avail); | |
389 | ||
390 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ | |
03f3a910 GKH |
391 | static struct attribute *vmbus_attrs[] = { |
392 | &dev_attr_id.attr, | |
a8fb5f3d | 393 | &dev_attr_state.attr, |
5ffd00e2 | 394 | &dev_attr_monitor_id.attr, |
68234c04 | 395 | &dev_attr_class_id.attr, |
7c55e1d0 | 396 | &dev_attr_device_id.attr, |
647fa371 | 397 | &dev_attr_modalias.attr, |
76c52bbe GKH |
398 | &dev_attr_server_monitor_pending.attr, |
399 | &dev_attr_client_monitor_pending.attr, | |
1cee272b GKH |
400 | &dev_attr_server_monitor_latency.attr, |
401 | &dev_attr_client_monitor_latency.attr, | |
4947c745 GKH |
402 | &dev_attr_server_monitor_conn_id.attr, |
403 | &dev_attr_client_monitor_conn_id.attr, | |
98f4c651 GKH |
404 | &dev_attr_out_intr_mask.attr, |
405 | &dev_attr_out_read_index.attr, | |
406 | &dev_attr_out_write_index.attr, | |
407 | &dev_attr_out_read_bytes_avail.attr, | |
408 | &dev_attr_out_write_bytes_avail.attr, | |
409 | &dev_attr_in_intr_mask.attr, | |
410 | &dev_attr_in_read_index.attr, | |
411 | &dev_attr_in_write_index.attr, | |
412 | &dev_attr_in_read_bytes_avail.attr, | |
413 | &dev_attr_in_write_bytes_avail.attr, | |
03f3a910 GKH |
414 | NULL, |
415 | }; | |
416 | ATTRIBUTE_GROUPS(vmbus); | |
417 | ||
adde2487 S |
418 | /* |
419 | * vmbus_uevent - add uevent for our device | |
420 | * | |
421 | * This routine is invoked when a device is added or removed on the vmbus to | |
422 | * generate a uevent to udev in the userspace. The udev will then look at its | |
423 | * rule and the uevent generated here to load the appropriate driver | |
0ddda660 S |
424 | * |
425 | * The alias string will be of the form vmbus:guid where guid is the string | |
426 | * representation of the device guid (each byte of the guid will be | |
427 | * represented with two hex characters. | |
adde2487 S |
428 | */ |
429 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) | |
430 | { | |
431 | struct hv_device *dev = device_to_hv_device(device); | |
fd776ba9 OH |
432 | int ret; |
433 | char alias_name[VMBUS_ALIAS_LEN + 1]; | |
0ddda660 | 434 | |
fd776ba9 | 435 | print_alias_name(dev, alias_name); |
0ddda660 S |
436 | ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name); |
437 | return ret; | |
adde2487 S |
438 | } |
439 | ||
1b9d48f2 | 440 | static const uuid_le null_guid; |
5841a829 S |
441 | |
442 | static inline bool is_null_guid(const __u8 *guid) | |
443 | { | |
444 | if (memcmp(guid, &null_guid, sizeof(uuid_le))) | |
445 | return false; | |
446 | return true; | |
447 | } | |
448 | ||
3037a7b6 S |
449 | /* |
450 | * Return a matching hv_vmbus_device_id pointer. | |
451 | * If there is no match, return NULL. | |
452 | */ | |
453 | static const struct hv_vmbus_device_id *hv_vmbus_get_id( | |
454 | const struct hv_vmbus_device_id *id, | |
1b9d48f2 | 455 | const __u8 *guid) |
3037a7b6 S |
456 | { |
457 | for (; !is_null_guid(id->guid); id++) | |
458 | if (!memcmp(&id->guid, guid, sizeof(uuid_le))) | |
459 | return id; | |
460 | ||
461 | return NULL; | |
462 | } | |
463 | ||
464 | ||
b7fc147b S |
465 | |
466 | /* | |
467 | * vmbus_match - Attempt to match the specified device to the specified driver | |
468 | */ | |
469 | static int vmbus_match(struct device *device, struct device_driver *driver) | |
470 | { | |
b7fc147b | 471 | struct hv_driver *drv = drv_to_hv_drv(driver); |
e8e27047 | 472 | struct hv_device *hv_dev = device_to_hv_device(device); |
b7fc147b | 473 | |
3037a7b6 S |
474 | if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b)) |
475 | return 1; | |
de632a2b | 476 | |
5841a829 | 477 | return 0; |
b7fc147b S |
478 | } |
479 | ||
f1f0d67b S |
480 | /* |
481 | * vmbus_probe - Add the new vmbus's child device | |
482 | */ | |
483 | static int vmbus_probe(struct device *child_device) | |
484 | { | |
485 | int ret = 0; | |
486 | struct hv_driver *drv = | |
487 | drv_to_hv_drv(child_device->driver); | |
9efd21e1 | 488 | struct hv_device *dev = device_to_hv_device(child_device); |
84946899 | 489 | const struct hv_vmbus_device_id *dev_id; |
f1f0d67b | 490 | |
84946899 | 491 | dev_id = hv_vmbus_get_id(drv->id_table, dev->dev_type.b); |
9efd21e1 | 492 | if (drv->probe) { |
84946899 | 493 | ret = drv->probe(dev, dev_id); |
b14a7b30 | 494 | if (ret != 0) |
0a46618d HJ |
495 | pr_err("probe failed for device %s (%d)\n", |
496 | dev_name(child_device), ret); | |
f1f0d67b | 497 | |
f1f0d67b | 498 | } else { |
0a46618d HJ |
499 | pr_err("probe not set for driver %s\n", |
500 | dev_name(child_device)); | |
6de925b1 | 501 | ret = -ENODEV; |
f1f0d67b S |
502 | } |
503 | return ret; | |
504 | } | |
505 | ||
c5dce3db S |
506 | /* |
507 | * vmbus_remove - Remove a vmbus device | |
508 | */ | |
509 | static int vmbus_remove(struct device *child_device) | |
510 | { | |
d15a0301 | 511 | struct hv_driver *drv; |
415b023a | 512 | struct hv_device *dev = device_to_hv_device(child_device); |
ed6cfcc5 | 513 | u32 relid = dev->channel->offermsg.child_relid; |
c5dce3db | 514 | |
d15a0301 S |
515 | if (child_device->driver) { |
516 | drv = drv_to_hv_drv(child_device->driver); | |
517 | if (drv->remove) | |
518 | drv->remove(dev); | |
ed6cfcc5 S |
519 | else { |
520 | hv_process_channel_removal(dev->channel, relid); | |
d15a0301 S |
521 | pr_err("remove not set for driver %s\n", |
522 | dev_name(child_device)); | |
ed6cfcc5 S |
523 | } |
524 | } else { | |
525 | /* | |
526 | * We don't have a driver for this device; deal with the | |
527 | * rescind message by removing the channel. | |
528 | */ | |
529 | hv_process_channel_removal(dev->channel, relid); | |
d15a0301 | 530 | } |
c5dce3db S |
531 | |
532 | return 0; | |
533 | } | |
534 | ||
eb1bb259 S |
535 | |
536 | /* | |
537 | * vmbus_shutdown - Shutdown a vmbus device | |
538 | */ | |
539 | static void vmbus_shutdown(struct device *child_device) | |
540 | { | |
541 | struct hv_driver *drv; | |
ca6887fb | 542 | struct hv_device *dev = device_to_hv_device(child_device); |
eb1bb259 S |
543 | |
544 | ||
545 | /* The device may not be attached yet */ | |
546 | if (!child_device->driver) | |
547 | return; | |
548 | ||
549 | drv = drv_to_hv_drv(child_device->driver); | |
550 | ||
ca6887fb S |
551 | if (drv->shutdown) |
552 | drv->shutdown(dev); | |
eb1bb259 S |
553 | |
554 | return; | |
555 | } | |
556 | ||
086e7a56 S |
557 | |
558 | /* | |
559 | * vmbus_device_release - Final callback release of the vmbus child device | |
560 | */ | |
561 | static void vmbus_device_release(struct device *device) | |
562 | { | |
e8e27047 | 563 | struct hv_device *hv_dev = device_to_hv_device(device); |
086e7a56 | 564 | |
e8e27047 | 565 | kfree(hv_dev); |
086e7a56 S |
566 | |
567 | } | |
568 | ||
454f18a9 | 569 | /* The one and only one */ |
9adcac5c S |
570 | static struct bus_type hv_bus = { |
571 | .name = "vmbus", | |
572 | .match = vmbus_match, | |
573 | .shutdown = vmbus_shutdown, | |
574 | .remove = vmbus_remove, | |
575 | .probe = vmbus_probe, | |
576 | .uevent = vmbus_uevent, | |
03f3a910 | 577 | .dev_groups = vmbus_groups, |
3e7ee490 HJ |
578 | }; |
579 | ||
bf6506f6 TT |
580 | struct onmessage_work_context { |
581 | struct work_struct work; | |
582 | struct hv_message msg; | |
583 | }; | |
584 | ||
585 | static void vmbus_onmessage_work(struct work_struct *work) | |
586 | { | |
587 | struct onmessage_work_context *ctx; | |
588 | ||
09a19628 VK |
589 | /* Do not process messages if we're in DISCONNECTED state */ |
590 | if (vmbus_connection.conn_state == DISCONNECTED) | |
591 | return; | |
592 | ||
bf6506f6 TT |
593 | ctx = container_of(work, struct onmessage_work_context, |
594 | work); | |
595 | vmbus_onmessage(&ctx->msg); | |
596 | kfree(ctx); | |
597 | } | |
598 | ||
d8a60e00 | 599 | static void hv_process_timer_expiration(struct hv_message *msg, int cpu) |
4061ed9e S |
600 | { |
601 | struct clock_event_device *dev = hv_context.clk_evt[cpu]; | |
602 | ||
603 | if (dev->event_handler) | |
604 | dev->event_handler(dev); | |
605 | ||
606 | msg->header.message_type = HVMSG_NONE; | |
607 | ||
608 | /* | |
609 | * Make sure the write to MessageType (ie set to | |
610 | * HVMSG_NONE) happens before we read the | |
611 | * MessagePending and EOMing. Otherwise, the EOMing | |
612 | * will not deliver any more messages since there is | |
613 | * no empty slot | |
614 | */ | |
615 | mb(); | |
616 | ||
617 | if (msg->header.message_flags.msg_pending) { | |
618 | /* | |
619 | * This will cause message queue rescan to | |
620 | * possibly deliver another msg from the | |
621 | * hypervisor | |
622 | */ | |
623 | wrmsrl(HV_X64_MSR_EOM, 0); | |
624 | } | |
625 | } | |
626 | ||
62c1059d | 627 | static void vmbus_on_msg_dpc(unsigned long data) |
36199a99 GKH |
628 | { |
629 | int cpu = smp_processor_id(); | |
630 | void *page_addr = hv_context.synic_message_page[cpu]; | |
631 | struct hv_message *msg = (struct hv_message *)page_addr + | |
632 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 633 | struct onmessage_work_context *ctx; |
36199a99 GKH |
634 | |
635 | while (1) { | |
636 | if (msg->header.message_type == HVMSG_NONE) { | |
637 | /* no msg */ | |
638 | break; | |
639 | } else { | |
bf6506f6 TT |
640 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
641 | if (ctx == NULL) | |
36199a99 | 642 | continue; |
bf6506f6 TT |
643 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
644 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 645 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
646 | } |
647 | ||
648 | msg->header.message_type = HVMSG_NONE; | |
649 | ||
650 | /* | |
651 | * Make sure the write to MessageType (ie set to | |
652 | * HVMSG_NONE) happens before we read the | |
653 | * MessagePending and EOMing. Otherwise, the EOMing | |
654 | * will not deliver any more messages since there is | |
655 | * no empty slot | |
656 | */ | |
35848f68 | 657 | mb(); |
36199a99 GKH |
658 | |
659 | if (msg->header.message_flags.msg_pending) { | |
660 | /* | |
661 | * This will cause message queue rescan to | |
662 | * possibly deliver another msg from the | |
663 | * hypervisor | |
664 | */ | |
665 | wrmsrl(HV_X64_MSR_EOM, 0); | |
666 | } | |
667 | } | |
668 | } | |
669 | ||
76d388cd | 670 | static void vmbus_isr(void) |
36199a99 | 671 | { |
36199a99 GKH |
672 | int cpu = smp_processor_id(); |
673 | void *page_addr; | |
674 | struct hv_message *msg; | |
675 | union hv_synic_event_flags *event; | |
ae4636e6 | 676 | bool handled = false; |
36199a99 | 677 | |
5ab05951 S |
678 | page_addr = hv_context.synic_event_page[cpu]; |
679 | if (page_addr == NULL) | |
76d388cd | 680 | return; |
5ab05951 S |
681 | |
682 | event = (union hv_synic_event_flags *)page_addr + | |
683 | VMBUS_MESSAGE_SINT; | |
7341d908 S |
684 | /* |
685 | * Check for events before checking for messages. This is the order | |
686 | * in which events and messages are checked in Windows guests on | |
687 | * Hyper-V, and the Windows team suggested we do the same. | |
688 | */ | |
36199a99 | 689 | |
6552ecd7 S |
690 | if ((vmbus_proto_version == VERSION_WS2008) || |
691 | (vmbus_proto_version == VERSION_WIN7)) { | |
36199a99 | 692 | |
6552ecd7 S |
693 | /* Since we are a child, we only need to check bit 0 */ |
694 | if (sync_test_and_clear_bit(0, | |
695 | (unsigned long *) &event->flags32[0])) { | |
696 | handled = true; | |
697 | } | |
698 | } else { | |
699 | /* | |
700 | * Our host is win8 or above. The signaling mechanism | |
701 | * has changed and we can directly look at the event page. | |
702 | * If bit n is set then we have an interrup on the channel | |
703 | * whose id is n. | |
704 | */ | |
ae4636e6 | 705 | handled = true; |
ae4636e6 | 706 | } |
793be9c7 | 707 | |
6552ecd7 | 708 | if (handled) |
db11f12a | 709 | tasklet_schedule(hv_context.event_dpc[cpu]); |
6552ecd7 S |
710 | |
711 | ||
7341d908 S |
712 | page_addr = hv_context.synic_message_page[cpu]; |
713 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
714 | ||
715 | /* Check if there are actual msgs to be processed */ | |
4061ed9e S |
716 | if (msg->header.message_type != HVMSG_NONE) { |
717 | if (msg->header.message_type == HVMSG_TIMER_EXPIRED) | |
718 | hv_process_timer_expiration(msg, cpu); | |
719 | else | |
720 | tasklet_schedule(&msg_dpc); | |
721 | } | |
793be9c7 S |
722 | } |
723 | ||
e513229b VK |
724 | #ifdef CONFIG_HOTPLUG_CPU |
725 | static int hyperv_cpu_disable(void) | |
726 | { | |
727 | return -ENOSYS; | |
728 | } | |
729 | ||
730 | static void hv_cpu_hotplug_quirk(bool vmbus_loaded) | |
731 | { | |
732 | static void *previous_cpu_disable; | |
733 | ||
734 | /* | |
735 | * Offlining a CPU when running on newer hypervisors (WS2012R2, Win8, | |
736 | * ...) is not supported at this moment as channel interrupts are | |
737 | * distributed across all of them. | |
738 | */ | |
739 | ||
740 | if ((vmbus_proto_version == VERSION_WS2008) || | |
741 | (vmbus_proto_version == VERSION_WIN7)) | |
742 | return; | |
743 | ||
744 | if (vmbus_loaded) { | |
745 | previous_cpu_disable = smp_ops.cpu_disable; | |
746 | smp_ops.cpu_disable = hyperv_cpu_disable; | |
747 | pr_notice("CPU offlining is not supported by hypervisor\n"); | |
748 | } else if (previous_cpu_disable) | |
749 | smp_ops.cpu_disable = previous_cpu_disable; | |
750 | } | |
751 | #else | |
752 | static void hv_cpu_hotplug_quirk(bool vmbus_loaded) | |
753 | { | |
754 | } | |
755 | #endif | |
756 | ||
3e189519 | 757 | /* |
90c9960e GKH |
758 | * vmbus_bus_init -Main vmbus driver initialization routine. |
759 | * | |
760 | * Here, we | |
0686e4f4 | 761 | * - initialize the vmbus driver context |
0686e4f4 LL |
762 | * - invoke the vmbus hv main init routine |
763 | * - get the irq resource | |
0686e4f4 | 764 | * - retrieve the channel offers |
90c9960e | 765 | */ |
9aaa995e | 766 | static int vmbus_bus_init(int irq) |
3e7ee490 | 767 | { |
90c9960e | 768 | int ret; |
3e7ee490 | 769 | |
6d26e38f GKH |
770 | /* Hypervisor initialization...setup hypercall page..etc */ |
771 | ret = hv_init(); | |
90c9960e | 772 | if (ret != 0) { |
0a46618d | 773 | pr_err("Unable to initialize the hypervisor - 0x%x\n", ret); |
d6c1c5de | 774 | return ret; |
3e7ee490 HJ |
775 | } |
776 | ||
59c0e4f0 | 777 | tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0); |
3e7ee490 | 778 | |
9adcac5c | 779 | ret = bus_register(&hv_bus); |
d6c1c5de | 780 | if (ret) |
8b9987e9 | 781 | goto err_cleanup; |
3e7ee490 | 782 | |
76d388cd | 783 | hv_setup_vmbus_irq(vmbus_isr); |
3e7ee490 | 784 | |
2608fb65 JW |
785 | ret = hv_synic_alloc(); |
786 | if (ret) | |
787 | goto err_alloc; | |
800b6902 | 788 | /* |
302a3c0f | 789 | * Initialize the per-cpu interrupt state and |
800b6902 S |
790 | * connect to the host. |
791 | */ | |
302a3c0f | 792 | on_each_cpu(hv_synic_init, NULL, 1); |
800b6902 | 793 | ret = vmbus_connect(); |
8b9987e9 | 794 | if (ret) |
2608fb65 | 795 | goto err_alloc; |
800b6902 | 796 | |
e513229b | 797 | hv_cpu_hotplug_quirk(true); |
2d6e882b | 798 | vmbus_request_offers(); |
8b5d6d3b | 799 | |
d6c1c5de | 800 | return 0; |
8b9987e9 | 801 | |
2608fb65 JW |
802 | err_alloc: |
803 | hv_synic_free(); | |
76d388cd | 804 | hv_remove_vmbus_irq(); |
8b9987e9 | 805 | |
8b9987e9 S |
806 | bus_unregister(&hv_bus); |
807 | ||
808 | err_cleanup: | |
809 | hv_cleanup(); | |
810 | ||
811 | return ret; | |
3e7ee490 HJ |
812 | } |
813 | ||
90c9960e | 814 | /** |
768fa219 GKH |
815 | * __vmbus_child_driver_register - Register a vmbus's driver |
816 | * @drv: Pointer to driver structure you want to register | |
817 | * @owner: owner module of the drv | |
818 | * @mod_name: module name string | |
3e189519 HJ |
819 | * |
820 | * Registers the given driver with Linux through the 'driver_register()' call | |
768fa219 | 821 | * and sets up the hyper-v vmbus handling for this driver. |
3e189519 HJ |
822 | * It will return the state of the 'driver_register()' call. |
823 | * | |
90c9960e | 824 | */ |
768fa219 | 825 | int __vmbus_driver_register(struct hv_driver *hv_driver, struct module *owner, const char *mod_name) |
3e7ee490 | 826 | { |
5d48a1c2 | 827 | int ret; |
3e7ee490 | 828 | |
768fa219 | 829 | pr_info("registering driver %s\n", hv_driver->name); |
3e7ee490 | 830 | |
cf6a2eac S |
831 | ret = vmbus_exists(); |
832 | if (ret < 0) | |
833 | return ret; | |
834 | ||
768fa219 GKH |
835 | hv_driver->driver.name = hv_driver->name; |
836 | hv_driver->driver.owner = owner; | |
837 | hv_driver->driver.mod_name = mod_name; | |
838 | hv_driver->driver.bus = &hv_bus; | |
3e7ee490 | 839 | |
768fa219 | 840 | ret = driver_register(&hv_driver->driver); |
3e7ee490 | 841 | |
5d48a1c2 | 842 | return ret; |
3e7ee490 | 843 | } |
768fa219 | 844 | EXPORT_SYMBOL_GPL(__vmbus_driver_register); |
3e7ee490 | 845 | |
90c9960e | 846 | /** |
768fa219 GKH |
847 | * vmbus_driver_unregister() - Unregister a vmbus's driver |
848 | * @drv: Pointer to driver structure you want to un-register | |
3e189519 | 849 | * |
768fa219 GKH |
850 | * Un-register the given driver that was previous registered with a call to |
851 | * vmbus_driver_register() | |
90c9960e | 852 | */ |
768fa219 | 853 | void vmbus_driver_unregister(struct hv_driver *hv_driver) |
3e7ee490 | 854 | { |
768fa219 | 855 | pr_info("unregistering driver %s\n", hv_driver->name); |
3e7ee490 | 856 | |
cf6a2eac | 857 | if (!vmbus_exists()) |
8f257a14 | 858 | driver_unregister(&hv_driver->driver); |
3e7ee490 | 859 | } |
768fa219 | 860 | EXPORT_SYMBOL_GPL(vmbus_driver_unregister); |
3e7ee490 | 861 | |
3e189519 | 862 | /* |
f2c73011 | 863 | * vmbus_device_create - Creates and registers a new child device |
3e189519 | 864 | * on the vmbus. |
90c9960e | 865 | */ |
1b9d48f2 | 866 | struct hv_device *vmbus_device_create(const uuid_le *type, |
867 | const uuid_le *instance, | |
868 | struct vmbus_channel *channel) | |
3e7ee490 | 869 | { |
3d3b5518 | 870 | struct hv_device *child_device_obj; |
3e7ee490 | 871 | |
6bad88da S |
872 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
873 | if (!child_device_obj) { | |
0a46618d | 874 | pr_err("Unable to allocate device object for child device\n"); |
3e7ee490 HJ |
875 | return NULL; |
876 | } | |
877 | ||
cae5b843 | 878 | child_device_obj->channel = channel; |
358d2ee2 | 879 | memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le)); |
ca623ad3 | 880 | memcpy(&child_device_obj->dev_instance, instance, |
358d2ee2 | 881 | sizeof(uuid_le)); |
3e7ee490 | 882 | |
3e7ee490 | 883 | |
3e7ee490 HJ |
884 | return child_device_obj; |
885 | } | |
886 | ||
3e189519 | 887 | /* |
22794281 | 888 | * vmbus_device_register - Register the child device |
90c9960e | 889 | */ |
22794281 | 890 | int vmbus_device_register(struct hv_device *child_device_obj) |
3e7ee490 | 891 | { |
90c9960e | 892 | int ret = 0; |
6bad88da | 893 | |
bc63b6f6 VK |
894 | dev_set_name(&child_device_obj->device, "vmbus_%d", |
895 | child_device_obj->channel->id); | |
3e7ee490 | 896 | |
0bce28b6 | 897 | child_device_obj->device.bus = &hv_bus; |
607c1a11 | 898 | child_device_obj->device.parent = &hv_acpi_dev->dev; |
6bad88da | 899 | child_device_obj->device.release = vmbus_device_release; |
3e7ee490 | 900 | |
90c9960e GKH |
901 | /* |
902 | * Register with the LDM. This will kick off the driver/device | |
903 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
904 | */ | |
6bad88da | 905 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 906 | |
3e7ee490 | 907 | if (ret) |
0a46618d | 908 | pr_err("Unable to register child device\n"); |
3e7ee490 | 909 | else |
84672369 | 910 | pr_debug("child device %s registered\n", |
0a46618d | 911 | dev_name(&child_device_obj->device)); |
3e7ee490 | 912 | |
3e7ee490 HJ |
913 | return ret; |
914 | } | |
915 | ||
3e189519 | 916 | /* |
696453ba | 917 | * vmbus_device_unregister - Remove the specified child device |
3e189519 | 918 | * from the vmbus. |
90c9960e | 919 | */ |
696453ba | 920 | void vmbus_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 921 | { |
84672369 FS |
922 | pr_debug("child device %s unregistered\n", |
923 | dev_name(&device_obj->device)); | |
924 | ||
90c9960e GKH |
925 | /* |
926 | * Kick off the process of unregistering the device. | |
927 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
928 | */ | |
6bad88da | 929 | device_unregister(&device_obj->device); |
3e7ee490 HJ |
930 | } |
931 | ||
3e7ee490 | 932 | |
b0069f43 | 933 | /* |
90f34535 S |
934 | * VMBUS is an acpi enumerated device. Get the the information we |
935 | * need from DSDT. | |
b0069f43 S |
936 | */ |
937 | ||
90f34535 | 938 | static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx) |
b0069f43 | 939 | { |
90f34535 S |
940 | switch (res->type) { |
941 | case ACPI_RESOURCE_TYPE_IRQ: | |
942 | irq = res->data.irq.interrupts[0]; | |
4eb923f8 | 943 | break; |
b0069f43 | 944 | |
90f34535 | 945 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
a45de93e LZ |
946 | hyperv_mmio.start = res->data.address64.address.minimum; |
947 | hyperv_mmio.end = res->data.address64.address.maximum; | |
4eb923f8 | 948 | break; |
b0069f43 S |
949 | } |
950 | ||
951 | return AE_OK; | |
952 | } | |
953 | ||
954 | static int vmbus_acpi_add(struct acpi_device *device) | |
955 | { | |
956 | acpi_status result; | |
90f34535 | 957 | int ret_val = -ENODEV; |
b0069f43 | 958 | |
607c1a11 S |
959 | hv_acpi_dev = device; |
960 | ||
0a4425b6 | 961 | result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, |
90f34535 | 962 | vmbus_walk_resources, NULL); |
b0069f43 | 963 | |
90f34535 S |
964 | if (ACPI_FAILURE(result)) |
965 | goto acpi_walk_err; | |
966 | /* | |
967 | * The parent of the vmbus acpi device (Gen2 firmware) is the VMOD that | |
968 | * has the mmio ranges. Get that. | |
969 | */ | |
970 | if (device->parent) { | |
971 | result = acpi_walk_resources(device->parent->handle, | |
972 | METHOD_NAME__CRS, | |
973 | vmbus_walk_resources, NULL); | |
974 | ||
975 | if (ACPI_FAILURE(result)) | |
976 | goto acpi_walk_err; | |
90eedf0c GH |
977 | if (hyperv_mmio.start && hyperv_mmio.end) |
978 | request_resource(&iomem_resource, &hyperv_mmio); | |
b0069f43 | 979 | } |
90f34535 S |
980 | ret_val = 0; |
981 | ||
982 | acpi_walk_err: | |
b0069f43 | 983 | complete(&probe_event); |
90f34535 | 984 | return ret_val; |
b0069f43 S |
985 | } |
986 | ||
987 | static const struct acpi_device_id vmbus_acpi_device_ids[] = { | |
988 | {"VMBUS", 0}, | |
9d7b18d1 | 989 | {"VMBus", 0}, |
b0069f43 S |
990 | {"", 0}, |
991 | }; | |
992 | MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); | |
993 | ||
994 | static struct acpi_driver vmbus_acpi_driver = { | |
995 | .name = "vmbus", | |
996 | .ids = vmbus_acpi_device_ids, | |
997 | .ops = { | |
998 | .add = vmbus_acpi_add, | |
999 | }, | |
1000 | }; | |
1001 | ||
607c1a11 | 1002 | static int __init hv_acpi_init(void) |
1168ac22 | 1003 | { |
2dda95f8 | 1004 | int ret, t; |
b0069f43 | 1005 | |
1f94ea81 | 1006 | if (x86_hyper != &x86_hyper_ms_hyperv) |
0592969e JW |
1007 | return -ENODEV; |
1008 | ||
b0069f43 S |
1009 | init_completion(&probe_event); |
1010 | ||
1011 | /* | |
1012 | * Get irq resources first. | |
1013 | */ | |
0246604c S |
1014 | ret = acpi_bus_register_driver(&vmbus_acpi_driver); |
1015 | ||
b0069f43 S |
1016 | if (ret) |
1017 | return ret; | |
1018 | ||
2dda95f8 S |
1019 | t = wait_for_completion_timeout(&probe_event, 5*HZ); |
1020 | if (t == 0) { | |
1021 | ret = -ETIMEDOUT; | |
1022 | goto cleanup; | |
1023 | } | |
b0069f43 S |
1024 | |
1025 | if (irq <= 0) { | |
2dda95f8 S |
1026 | ret = -ENODEV; |
1027 | goto cleanup; | |
b0069f43 S |
1028 | } |
1029 | ||
91fd799e S |
1030 | ret = vmbus_bus_init(irq); |
1031 | if (ret) | |
2dda95f8 S |
1032 | goto cleanup; |
1033 | ||
1034 | return 0; | |
1035 | ||
1036 | cleanup: | |
1037 | acpi_bus_unregister_driver(&vmbus_acpi_driver); | |
cf6a2eac | 1038 | hv_acpi_dev = NULL; |
91fd799e | 1039 | return ret; |
1168ac22 S |
1040 | } |
1041 | ||
93e5bd06 S |
1042 | static void __exit vmbus_exit(void) |
1043 | { | |
e72e7ac5 VK |
1044 | int cpu; |
1045 | ||
09a19628 | 1046 | vmbus_connection.conn_state = DISCONNECTED; |
e086748c | 1047 | hv_synic_clockevents_cleanup(); |
76d388cd | 1048 | hv_remove_vmbus_irq(); |
93e5bd06 S |
1049 | vmbus_free_channels(); |
1050 | bus_unregister(&hv_bus); | |
1051 | hv_cleanup(); | |
e72e7ac5 VK |
1052 | for_each_online_cpu(cpu) |
1053 | smp_call_function_single(cpu, hv_synic_cleanup, NULL, 1); | |
93e5bd06 | 1054 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
e513229b | 1055 | hv_cpu_hotplug_quirk(false); |
09a19628 | 1056 | vmbus_disconnect(); |
93e5bd06 S |
1057 | } |
1058 | ||
1168ac22 | 1059 | |
90c9960e | 1060 | MODULE_LICENSE("GPL"); |
3e7ee490 | 1061 | |
43d4e119 | 1062 | subsys_initcall(hv_acpi_init); |
93e5bd06 | 1063 | module_exit(vmbus_exit); |