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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> | |
52e5c1ce S |
20 | * |
21 | * 3/9/2011: K. Y. Srinivasan - Significant restructuring and cleanup | |
3e7ee490 | 22 | */ |
3e7ee490 HJ |
23 | #include <linux/init.h> |
24 | #include <linux/module.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/irq.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/sysctl.h> | |
9a775dbd | 29 | #include <linux/pci.h> |
c22090fa | 30 | #include <linux/dmi.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
8b5d6d3b | 32 | #include <linux/completion.h> |
2d82f6c7 | 33 | #include "version_info.h" |
e3fe0bb6 | 34 | #include "hv_api.h" |
645954c5 | 35 | #include "logging.h" |
870cde80 | 36 | #include "vmbus.h" |
150b19d4 | 37 | #include "channel.h" |
36199a99 | 38 | #include "vmbus_private.h" |
3e7ee490 | 39 | |
3e7ee490 | 40 | |
1168ac22 S |
41 | struct pci_dev *hv_pci_dev; |
42 | ||
454f18a9 | 43 | /* Main vmbus driver data structure */ |
04677c08 | 44 | struct hv_bus { |
90c9960e GKH |
45 | struct bus_type bus; |
46 | struct tasklet_struct msg_dpc; | |
47 | struct tasklet_struct event_dpc; | |
3e7ee490 HJ |
48 | }; |
49 | ||
3e7ee490 | 50 | |
3e7ee490 | 51 | |
90c9960e GKH |
52 | static ssize_t vmbus_show_device_attr(struct device *dev, |
53 | struct device_attribute *dev_attr, | |
54 | char *buf); | |
3e7ee490 | 55 | |
3e7ee490 | 56 | |
90c9960e | 57 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 58 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
59 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
60 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 | 61 | |
3e7ee490 | 62 | |
454f18a9 | 63 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
64 | static struct device_attribute vmbus_device_attrs[] = { |
65 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
66 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
67 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
68 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
69 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
70 | ||
71 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
72 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
73 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
74 | ||
75 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
76 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
77 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
78 | ||
79 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
80 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
81 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
82 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
83 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
84 | ||
85 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
86 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
87 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
88 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
89 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
90 | __ATTR_NULL | |
91 | }; | |
3e7ee490 | 92 | |
793be9c7 | 93 | |
adde2487 S |
94 | /* |
95 | * vmbus_uevent - add uevent for our device | |
96 | * | |
97 | * This routine is invoked when a device is added or removed on the vmbus to | |
98 | * generate a uevent to udev in the userspace. The udev will then look at its | |
99 | * rule and the uevent generated here to load the appropriate driver | |
100 | */ | |
101 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) | |
102 | { | |
103 | struct hv_device *dev = device_to_hv_device(device); | |
104 | int ret; | |
105 | ||
106 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" | |
107 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
108 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
109 | dev->dev_type.data[3], dev->dev_type.data[2], | |
110 | dev->dev_type.data[1], dev->dev_type.data[0], | |
111 | dev->dev_type.data[5], dev->dev_type.data[4], | |
112 | dev->dev_type.data[7], dev->dev_type.data[6], | |
113 | dev->dev_type.data[8], dev->dev_type.data[9], | |
114 | dev->dev_type.data[10], | |
115 | dev->dev_type.data[11], | |
116 | dev->dev_type.data[12], | |
117 | dev->dev_type.data[13], | |
118 | dev->dev_type.data[14], | |
119 | dev->dev_type.data[15]); | |
120 | ||
121 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" | |
122 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
123 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
124 | dev->dev_type.data[3], | |
125 | dev->dev_type.data[2], | |
126 | dev->dev_type.data[1], | |
127 | dev->dev_type.data[0], | |
128 | dev->dev_type.data[5], | |
129 | dev->dev_type.data[4], | |
130 | dev->dev_type.data[7], | |
131 | dev->dev_type.data[6], | |
132 | dev->dev_type.data[8], | |
133 | dev->dev_type.data[9], | |
134 | dev->dev_type.data[10], | |
135 | dev->dev_type.data[11], | |
136 | dev->dev_type.data[12], | |
137 | dev->dev_type.data[13], | |
138 | dev->dev_type.data[14], | |
139 | dev->dev_type.data[15]); | |
140 | ||
141 | if (ret) | |
142 | return ret; | |
143 | ||
144 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" | |
145 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
146 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
147 | dev->dev_instance.data[3], | |
148 | dev->dev_instance.data[2], | |
149 | dev->dev_instance.data[1], | |
150 | dev->dev_instance.data[0], | |
151 | dev->dev_instance.data[5], | |
152 | dev->dev_instance.data[4], | |
153 | dev->dev_instance.data[7], | |
154 | dev->dev_instance.data[6], | |
155 | dev->dev_instance.data[8], | |
156 | dev->dev_instance.data[9], | |
157 | dev->dev_instance.data[10], | |
158 | dev->dev_instance.data[11], | |
159 | dev->dev_instance.data[12], | |
160 | dev->dev_instance.data[13], | |
161 | dev->dev_instance.data[14], | |
162 | dev->dev_instance.data[15]); | |
163 | if (ret) | |
164 | return ret; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
b7fc147b S |
169 | |
170 | /* | |
171 | * vmbus_match - Attempt to match the specified device to the specified driver | |
172 | */ | |
173 | static int vmbus_match(struct device *device, struct device_driver *driver) | |
174 | { | |
175 | int match = 0; | |
176 | struct hv_driver *drv = drv_to_hv_drv(driver); | |
177 | struct hv_device *device_ctx = device_to_hv_device(device); | |
178 | ||
179 | /* We found our driver ? */ | |
180 | if (memcmp(&device_ctx->dev_type, &drv->dev_type, | |
181 | sizeof(struct hv_guid)) == 0) { | |
182 | ||
183 | device_ctx->drv = drv->priv; | |
184 | DPRINT_INFO(VMBUS_DRV, | |
185 | "device object (%p) set to driver object (%p)", | |
186 | &device_ctx, | |
187 | device_ctx->drv); | |
188 | ||
189 | match = 1; | |
190 | } | |
191 | return match; | |
192 | } | |
193 | ||
f1f0d67b S |
194 | |
195 | /* | |
196 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() | |
197 | * | |
198 | * We need a callback because we cannot invoked device_unregister() inside | |
199 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
200 | * i.e. we cannot call device_unregister() inside device_register() | |
201 | */ | |
202 | static void vmbus_probe_failed_cb(struct work_struct *context) | |
203 | { | |
204 | struct hv_device *device_ctx = (struct hv_device *)context; | |
205 | ||
206 | /* | |
207 | * Kick off the process of unregistering the device. | |
208 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
209 | */ | |
210 | device_unregister(&device_ctx->device); | |
211 | ||
212 | /* put_device(&device_ctx->device); */ | |
213 | } | |
214 | ||
215 | /* | |
216 | * vmbus_probe - Add the new vmbus's child device | |
217 | */ | |
218 | static int vmbus_probe(struct device *child_device) | |
219 | { | |
220 | int ret = 0; | |
221 | struct hv_driver *drv = | |
222 | drv_to_hv_drv(child_device->driver); | |
223 | struct hv_device *dev = device_to_hv_device(child_device); | |
224 | ||
225 | /* Let the specific open-source driver handles the probe if it can */ | |
226 | if (drv->driver.probe) { | |
227 | ret = dev->probe_error = | |
228 | drv->driver.probe(child_device); | |
229 | if (ret != 0) { | |
230 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
231 | "(%p) on driver %s (%d)...", | |
232 | dev_name(child_device), child_device, | |
233 | child_device->driver->name, ret); | |
234 | ||
235 | INIT_WORK(&dev->probe_failed_work_item, | |
236 | vmbus_probe_failed_cb); | |
237 | schedule_work(&dev->probe_failed_work_item); | |
238 | } | |
239 | } else { | |
240 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
241 | child_device->driver->name); | |
242 | ret = -1; | |
243 | } | |
244 | return ret; | |
245 | } | |
246 | ||
c5dce3db S |
247 | /* |
248 | * vmbus_remove - Remove a vmbus device | |
249 | */ | |
250 | static int vmbus_remove(struct device *child_device) | |
251 | { | |
252 | int ret; | |
253 | struct hv_driver *drv; | |
254 | ||
255 | ||
256 | if (child_device->driver) { | |
257 | drv = drv_to_hv_drv(child_device->driver); | |
258 | ||
259 | /* | |
260 | * Let the specific open-source driver handles the removal if | |
261 | * it can | |
262 | */ | |
263 | if (drv->driver.remove) { | |
264 | ret = drv->driver.remove(child_device); | |
265 | } else { | |
266 | DPRINT_ERR(VMBUS_DRV, | |
267 | "remove() method not set for driver - %s", | |
268 | child_device->driver->name); | |
269 | ret = -1; | |
270 | } | |
271 | } | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
eb1bb259 S |
276 | |
277 | /* | |
278 | * vmbus_shutdown - Shutdown a vmbus device | |
279 | */ | |
280 | static void vmbus_shutdown(struct device *child_device) | |
281 | { | |
282 | struct hv_driver *drv; | |
283 | ||
284 | ||
285 | /* The device may not be attached yet */ | |
286 | if (!child_device->driver) | |
287 | return; | |
288 | ||
289 | drv = drv_to_hv_drv(child_device->driver); | |
290 | ||
291 | /* Let the specific open-source driver handles the removal if it can */ | |
292 | if (drv->driver.shutdown) | |
293 | drv->driver.shutdown(child_device); | |
294 | ||
295 | return; | |
296 | } | |
297 | ||
086e7a56 S |
298 | |
299 | /* | |
300 | * vmbus_device_release - Final callback release of the vmbus child device | |
301 | */ | |
302 | static void vmbus_device_release(struct device *device) | |
303 | { | |
304 | struct hv_device *device_ctx = device_to_hv_device(device); | |
305 | ||
306 | kfree(device_ctx); | |
307 | ||
308 | } | |
309 | ||
454f18a9 | 310 | /* The one and only one */ |
04677c08 | 311 | static struct hv_bus hv_bus = { |
90c9960e GKH |
312 | .bus.name = "vmbus", |
313 | .bus.match = vmbus_match, | |
314 | .bus.shutdown = vmbus_shutdown, | |
315 | .bus.remove = vmbus_remove, | |
316 | .bus.probe = vmbus_probe, | |
317 | .bus.uevent = vmbus_uevent, | |
318 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
319 | }; |
320 | ||
adf874cb | 321 | static const char *driver_name = "hyperv"; |
36199a99 | 322 | |
36199a99 | 323 | |
bf6506f6 TT |
324 | struct onmessage_work_context { |
325 | struct work_struct work; | |
326 | struct hv_message msg; | |
327 | }; | |
328 | ||
329 | static void vmbus_onmessage_work(struct work_struct *work) | |
330 | { | |
331 | struct onmessage_work_context *ctx; | |
332 | ||
333 | ctx = container_of(work, struct onmessage_work_context, | |
334 | work); | |
335 | vmbus_onmessage(&ctx->msg); | |
336 | kfree(ctx); | |
337 | } | |
338 | ||
36199a99 GKH |
339 | /* |
340 | * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior | |
341 | */ | |
62c1059d | 342 | static void vmbus_on_msg_dpc(unsigned long data) |
36199a99 GKH |
343 | { |
344 | int cpu = smp_processor_id(); | |
345 | void *page_addr = hv_context.synic_message_page[cpu]; | |
346 | struct hv_message *msg = (struct hv_message *)page_addr + | |
347 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 348 | struct onmessage_work_context *ctx; |
36199a99 GKH |
349 | |
350 | while (1) { | |
351 | if (msg->header.message_type == HVMSG_NONE) { | |
352 | /* no msg */ | |
353 | break; | |
354 | } else { | |
bf6506f6 TT |
355 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
356 | if (ctx == NULL) | |
36199a99 | 357 | continue; |
bf6506f6 TT |
358 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
359 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 360 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
361 | } |
362 | ||
363 | msg->header.message_type = HVMSG_NONE; | |
364 | ||
365 | /* | |
366 | * Make sure the write to MessageType (ie set to | |
367 | * HVMSG_NONE) happens before we read the | |
368 | * MessagePending and EOMing. Otherwise, the EOMing | |
369 | * will not deliver any more messages since there is | |
370 | * no empty slot | |
371 | */ | |
372 | mb(); | |
373 | ||
374 | if (msg->header.message_flags.msg_pending) { | |
375 | /* | |
376 | * This will cause message queue rescan to | |
377 | * possibly deliver another msg from the | |
378 | * hypervisor | |
379 | */ | |
380 | wrmsrl(HV_X64_MSR_EOM, 0); | |
381 | } | |
382 | } | |
383 | } | |
384 | ||
36199a99 GKH |
385 | /* |
386 | * vmbus_on_isr - ISR routine | |
387 | */ | |
480ae58d | 388 | static int vmbus_on_isr(void) |
36199a99 GKH |
389 | { |
390 | int ret = 0; | |
391 | int cpu = smp_processor_id(); | |
392 | void *page_addr; | |
393 | struct hv_message *msg; | |
394 | union hv_synic_event_flags *event; | |
395 | ||
396 | page_addr = hv_context.synic_message_page[cpu]; | |
397 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
398 | ||
399 | /* Check if there are actual msgs to be process */ | |
400 | if (msg->header.message_type != HVMSG_NONE) { | |
401 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
402 | msg->header.message_type, | |
403 | msg->header.payload_size); | |
404 | ret |= 0x1; | |
405 | } | |
406 | ||
407 | /* TODO: Check if there are events to be process */ | |
408 | page_addr = hv_context.synic_event_page[cpu]; | |
409 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; | |
410 | ||
411 | /* Since we are a child, we only need to check bit 0 */ | |
412 | if (test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { | |
413 | DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]); | |
414 | ret |= 0x2; | |
415 | } | |
416 | ||
417 | return ret; | |
418 | } | |
419 | ||
793be9c7 S |
420 | |
421 | static irqreturn_t vmbus_isr(int irq, void *dev_id) | |
422 | { | |
423 | int ret; | |
424 | ||
425 | ret = vmbus_on_isr(); | |
426 | ||
427 | /* Schedules a dpc if necessary */ | |
428 | if (ret > 0) { | |
429 | if (test_bit(0, (unsigned long *)&ret)) | |
430 | tasklet_schedule(&hv_bus.msg_dpc); | |
431 | ||
432 | if (test_bit(1, (unsigned long *)&ret)) | |
433 | tasklet_schedule(&hv_bus.event_dpc); | |
434 | ||
435 | return IRQ_HANDLED; | |
436 | } else { | |
437 | return IRQ_NONE; | |
438 | } | |
439 | } | |
440 | ||
441 | ||
150b19d4 GKH |
442 | static void get_channel_info(struct hv_device *device, |
443 | struct hv_device_info *info) | |
444 | { | |
445 | struct vmbus_channel_debug_info debug_info; | |
446 | ||
cae5b843 | 447 | if (!device->channel) |
150b19d4 GKH |
448 | return; |
449 | ||
cae5b843 | 450 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 451 | |
ca623ad3 HZ |
452 | info->chn_id = debug_info.relid; |
453 | info->chn_state = debug_info.state; | |
454 | memcpy(&info->chn_type, &debug_info.interfacetype, | |
150b19d4 | 455 | sizeof(struct hv_guid)); |
ca623ad3 | 456 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
150b19d4 GKH |
457 | sizeof(struct hv_guid)); |
458 | ||
ca623ad3 | 459 | info->monitor_id = debug_info.monitorid; |
150b19d4 | 460 | |
ca623ad3 HZ |
461 | info->server_monitor_pending = debug_info.servermonitor_pending; |
462 | info->server_monitor_latency = debug_info.servermonitor_latency; | |
463 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; | |
150b19d4 | 464 | |
ca623ad3 HZ |
465 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
466 | info->client_monitor_latency = debug_info.clientmonitor_latency; | |
467 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; | |
150b19d4 | 468 | |
ca623ad3 HZ |
469 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
470 | info->inbound.read_idx = debug_info.inbound.current_read_index; | |
471 | info->inbound.write_idx = debug_info.inbound.current_write_index; | |
472 | info->inbound.bytes_avail_toread = | |
473 | debug_info.inbound.bytes_avail_toread; | |
474 | info->inbound.bytes_avail_towrite = | |
82f8bd40 HZ |
475 | debug_info.inbound.bytes_avail_towrite; |
476 | ||
ca623ad3 | 477 | info->outbound.int_mask = |
82f8bd40 | 478 | debug_info.outbound.current_interrupt_mask; |
ca623ad3 HZ |
479 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
480 | info->outbound.write_idx = debug_info.outbound.current_write_index; | |
481 | info->outbound.bytes_avail_toread = | |
82f8bd40 | 482 | debug_info.outbound.bytes_avail_toread; |
ca623ad3 | 483 | info->outbound.bytes_avail_towrite = |
82f8bd40 | 484 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
485 | } |
486 | ||
3e189519 | 487 | /* |
90c9960e GKH |
488 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
489 | * | |
490 | * This is invoked when user does a | |
491 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
492 | */ | |
493 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
494 | struct device_attribute *dev_attr, | |
495 | char *buf) | |
3e7ee490 | 496 | { |
6bad88da | 497 | struct hv_device *device_ctx = device_to_hv_device(dev); |
ee3d7ddf | 498 | struct hv_device_info device_info; |
3e7ee490 | 499 | |
ee3d7ddf | 500 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 501 | |
6bad88da | 502 | get_channel_info(device_ctx, &device_info); |
3e7ee490 | 503 | |
90c9960e GKH |
504 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
505 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
506 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
507 | device_info.chn_type.data[3], |
508 | device_info.chn_type.data[2], | |
509 | device_info.chn_type.data[1], | |
510 | device_info.chn_type.data[0], | |
511 | device_info.chn_type.data[5], | |
512 | device_info.chn_type.data[4], | |
513 | device_info.chn_type.data[7], | |
514 | device_info.chn_type.data[6], | |
515 | device_info.chn_type.data[8], | |
516 | device_info.chn_type.data[9], | |
517 | device_info.chn_type.data[10], | |
518 | device_info.chn_type.data[11], | |
519 | device_info.chn_type.data[12], | |
520 | device_info.chn_type.data[13], | |
521 | device_info.chn_type.data[14], | |
522 | device_info.chn_type.data[15]); | |
90c9960e GKH |
523 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
524 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
525 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
526 | device_info.chn_instance.data[3], |
527 | device_info.chn_instance.data[2], | |
528 | device_info.chn_instance.data[1], | |
529 | device_info.chn_instance.data[0], | |
530 | device_info.chn_instance.data[5], | |
531 | device_info.chn_instance.data[4], | |
532 | device_info.chn_instance.data[7], | |
533 | device_info.chn_instance.data[6], | |
534 | device_info.chn_instance.data[8], | |
535 | device_info.chn_instance.data[9], | |
536 | device_info.chn_instance.data[10], | |
537 | device_info.chn_instance.data[11], | |
538 | device_info.chn_instance.data[12], | |
539 | device_info.chn_instance.data[13], | |
540 | device_info.chn_instance.data[14], | |
541 | device_info.chn_instance.data[15]); | |
90c9960e | 542 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
ca623ad3 | 543 | return sprintf(buf, "%d\n", device_info.chn_state); |
90c9960e | 544 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
ca623ad3 | 545 | return sprintf(buf, "%d\n", device_info.chn_id); |
90c9960e | 546 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
ca623ad3 | 547 | return sprintf(buf, "%d\n", device_info.outbound.int_mask); |
90c9960e | 548 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
ca623ad3 | 549 | return sprintf(buf, "%d\n", device_info.outbound.read_idx); |
90c9960e | 550 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
ca623ad3 | 551 | return sprintf(buf, "%d\n", device_info.outbound.write_idx); |
90c9960e GKH |
552 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
553 | return sprintf(buf, "%d\n", | |
ca623ad3 | 554 | device_info.outbound.bytes_avail_toread); |
90c9960e GKH |
555 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
556 | return sprintf(buf, "%d\n", | |
ca623ad3 | 557 | device_info.outbound.bytes_avail_towrite); |
90c9960e | 558 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
ca623ad3 | 559 | return sprintf(buf, "%d\n", device_info.inbound.int_mask); |
90c9960e | 560 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
ca623ad3 | 561 | return sprintf(buf, "%d\n", device_info.inbound.read_idx); |
90c9960e | 562 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
ca623ad3 | 563 | return sprintf(buf, "%d\n", device_info.inbound.write_idx); |
90c9960e GKH |
564 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
565 | return sprintf(buf, "%d\n", | |
ca623ad3 | 566 | device_info.inbound.bytes_avail_toread); |
90c9960e GKH |
567 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
568 | return sprintf(buf, "%d\n", | |
ca623ad3 | 569 | device_info.inbound.bytes_avail_towrite); |
90c9960e | 570 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
ca623ad3 | 571 | return sprintf(buf, "%d\n", device_info.monitor_id); |
90c9960e | 572 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
ca623ad3 | 573 | return sprintf(buf, "%d\n", device_info.server_monitor_pending); |
90c9960e | 574 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
ca623ad3 | 575 | return sprintf(buf, "%d\n", device_info.server_monitor_latency); |
90c9960e GKH |
576 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
577 | return sprintf(buf, "%d\n", | |
ca623ad3 | 578 | device_info.server_monitor_conn_id); |
90c9960e | 579 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
ca623ad3 | 580 | return sprintf(buf, "%d\n", device_info.client_monitor_pending); |
90c9960e | 581 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
ca623ad3 | 582 | return sprintf(buf, "%d\n", device_info.client_monitor_latency); |
90c9960e GKH |
583 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
584 | return sprintf(buf, "%d\n", | |
ca623ad3 | 585 | device_info.client_monitor_conn_id); |
90c9960e | 586 | } else { |
3e7ee490 HJ |
587 | return 0; |
588 | } | |
589 | } | |
590 | ||
3e189519 | 591 | /* |
90c9960e GKH |
592 | * vmbus_bus_init -Main vmbus driver initialization routine. |
593 | * | |
594 | * Here, we | |
0686e4f4 | 595 | * - initialize the vmbus driver context |
0686e4f4 LL |
596 | * - invoke the vmbus hv main init routine |
597 | * - get the irq resource | |
0686e4f4 | 598 | * - retrieve the channel offers |
90c9960e | 599 | */ |
52e5c1ce | 600 | static int vmbus_bus_init(struct pci_dev *pdev) |
3e7ee490 | 601 | { |
90c9960e GKH |
602 | int ret; |
603 | unsigned int vector; | |
3e7ee490 | 604 | |
6d26e38f GKH |
605 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
606 | HV_DRV_VERSION); | |
607 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", | |
608 | VMBUS_REVISION_NUMBER); | |
609 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
610 | VMBUS_MESSAGE_SINT); | |
611 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " | |
612 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", | |
613 | sizeof(struct vmbus_channel_packet_page_buffer), | |
614 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
615 | ||
6d26e38f GKH |
616 | |
617 | /* Hypervisor initialization...setup hypercall page..etc */ | |
618 | ret = hv_init(); | |
90c9960e | 619 | if (ret != 0) { |
6d26e38f GKH |
620 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", |
621 | ret); | |
3e7ee490 HJ |
622 | goto cleanup; |
623 | } | |
624 | ||
3e7ee490 | 625 | |
04677c08 | 626 | hv_bus.bus.name = driver_name; |
3e7ee490 | 627 | |
454f18a9 | 628 | /* Initialize the bus context */ |
04677c08 | 629 | tasklet_init(&hv_bus.msg_dpc, vmbus_on_msg_dpc, |
a6e4d8e3 | 630 | (unsigned long)NULL); |
04677c08 | 631 | tasklet_init(&hv_bus.event_dpc, vmbus_on_event, |
a6e4d8e3 | 632 | (unsigned long)NULL); |
3e7ee490 | 633 | |
a6e4d8e3 | 634 | /* Now, register the bus with LDM */ |
04677c08 | 635 | ret = bus_register(&hv_bus.bus); |
90c9960e | 636 | if (ret) { |
c19fbca3 BP |
637 | ret = -1; |
638 | goto cleanup; | |
639 | } | |
3e7ee490 | 640 | |
454f18a9 | 641 | /* Get the interrupt resource */ |
52e5c1ce S |
642 | ret = request_irq(pdev->irq, vmbus_isr, |
643 | IRQF_SHARED | IRQF_SAMPLE_RANDOM, | |
644 | driver_name, pdev); | |
3e7ee490 | 645 | |
90c9960e GKH |
646 | if (ret != 0) { |
647 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
52e5c1ce | 648 | pdev->irq); |
3e7ee490 | 649 | |
04677c08 | 650 | bus_unregister(&hv_bus.bus); |
3e7ee490 HJ |
651 | |
652 | ret = -1; | |
653 | goto cleanup; | |
654 | } | |
3e7ee490 | 655 | |
52e5c1ce S |
656 | vector = IRQ0_VECTOR + pdev->irq; |
657 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", pdev->irq, | |
658 | vector); | |
3e7ee490 | 659 | |
800b6902 S |
660 | /* |
661 | * Notify the hypervisor of our irq and | |
662 | * connect to the host. | |
663 | */ | |
664 | on_each_cpu(hv_synic_init, (void *)&vector, 1); | |
665 | ret = vmbus_connect(); | |
90c9960e | 666 | if (ret) { |
52e5c1ce | 667 | free_irq(pdev->irq, pdev); |
04677c08 | 668 | bus_unregister(&hv_bus.bus); |
5d48a1c2 BP |
669 | goto cleanup; |
670 | } | |
671 | ||
800b6902 | 672 | |
2d6e882b | 673 | vmbus_request_offers(); |
8b5d6d3b HZ |
674 | wait_for_completion(&hv_channel_ready); |
675 | ||
3e7ee490 | 676 | cleanup: |
3e7ee490 HJ |
677 | return ret; |
678 | } | |
679 | ||
3e189519 | 680 | /* |
90c9960e GKH |
681 | * vmbus_bus_exit - Terminate the vmbus driver. |
682 | * | |
683 | * This routine is opposite of vmbus_bus_init() | |
684 | */ | |
bd1de709 | 685 | static void vmbus_bus_exit(void) |
3e7ee490 | 686 | { |
3e7ee490 | 687 | |
3e7ee490 | 688 | |
f51b3593 S |
689 | vmbus_release_unattached_channels(); |
690 | vmbus_disconnect(); | |
691 | on_each_cpu(hv_synic_cleanup, NULL, 1); | |
3e7ee490 | 692 | |
ece0e32f | 693 | hv_cleanup(); |
3e7ee490 | 694 | |
04677c08 | 695 | bus_unregister(&hv_bus.bus); |
3e7ee490 | 696 | |
52e5c1ce | 697 | free_irq(hv_pci_dev->irq, hv_pci_dev); |
3e7ee490 | 698 | |
04677c08 S |
699 | tasklet_kill(&hv_bus.msg_dpc); |
700 | tasklet_kill(&hv_bus.event_dpc); | |
3e7ee490 HJ |
701 | } |
702 | ||
3e189519 | 703 | |
90c9960e | 704 | /** |
3e189519 | 705 | * vmbus_child_driver_register() - Register a vmbus's child driver |
c643269d | 706 | * @drv: Pointer to driver structure you want to register |
3e189519 | 707 | * |
3e189519 HJ |
708 | * |
709 | * Registers the given driver with Linux through the 'driver_register()' call | |
710 | * And sets up the hyper-v vmbus handling for this driver. | |
711 | * It will return the state of the 'driver_register()' call. | |
712 | * | |
713 | * Mainly used by Hyper-V drivers. | |
90c9960e | 714 | */ |
c643269d | 715 | int vmbus_child_driver_register(struct device_driver *drv) |
3e7ee490 | 716 | { |
5d48a1c2 | 717 | int ret; |
3e7ee490 | 718 | |
90c9960e | 719 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
c643269d | 720 | drv, drv->name); |
3e7ee490 | 721 | |
454f18a9 | 722 | /* The child driver on this vmbus */ |
04677c08 | 723 | drv->bus = &hv_bus.bus; |
3e7ee490 | 724 | |
c643269d | 725 | ret = driver_register(drv); |
3e7ee490 | 726 | |
2d6e882b | 727 | vmbus_request_offers(); |
3e7ee490 | 728 | |
5d48a1c2 | 729 | return ret; |
3e7ee490 | 730 | } |
3e7ee490 HJ |
731 | EXPORT_SYMBOL(vmbus_child_driver_register); |
732 | ||
90c9960e | 733 | /** |
3e189519 | 734 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
06de23f7 | 735 | * @drv: Pointer to driver structure you want to un-register |
3e189519 | 736 | * |
3e189519 HJ |
737 | * |
738 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
739 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
740 | * | |
741 | * Mainly used by Hyper-V drivers. | |
90c9960e | 742 | */ |
06de23f7 | 743 | void vmbus_child_driver_unregister(struct device_driver *drv) |
3e7ee490 | 744 | { |
90c9960e | 745 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
06de23f7 | 746 | drv, drv->name); |
3e7ee490 | 747 | |
06de23f7 | 748 | driver_unregister(drv); |
3e7ee490 | 749 | |
06de23f7 | 750 | drv->bus = NULL; |
3e7ee490 | 751 | } |
3e7ee490 HJ |
752 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
753 | ||
3e189519 HJ |
754 | /* |
755 | * vmbus_child_device_create - Creates and registers a new child device | |
756 | * on the vmbus. | |
90c9960e | 757 | */ |
89733aa9 GKH |
758 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
759 | struct hv_guid *instance, | |
760 | struct vmbus_channel *channel) | |
3e7ee490 | 761 | { |
3d3b5518 | 762 | struct hv_device *child_device_obj; |
3e7ee490 | 763 | |
454f18a9 | 764 | /* Allocate the new child device */ |
6bad88da S |
765 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
766 | if (!child_device_obj) { | |
90c9960e GKH |
767 | DPRINT_ERR(VMBUS_DRV, |
768 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
769 | return NULL; |
770 | } | |
771 | ||
772 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
773 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
774 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
775 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
776 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
6bad88da | 777 | &child_device_obj->device, |
daaa8cc3 GKH |
778 | type->data[3], type->data[2], type->data[1], type->data[0], |
779 | type->data[5], type->data[4], type->data[7], type->data[6], | |
780 | type->data[8], type->data[9], type->data[10], type->data[11], | |
781 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
782 | instance->data[3], instance->data[2], |
783 | instance->data[1], instance->data[0], | |
784 | instance->data[5], instance->data[4], | |
785 | instance->data[7], instance->data[6], | |
786 | instance->data[8], instance->data[9], | |
787 | instance->data[10], instance->data[11], | |
788 | instance->data[12], instance->data[13], | |
789 | instance->data[14], instance->data[15]); | |
3e7ee490 | 790 | |
cae5b843 | 791 | child_device_obj->channel = channel; |
ca623ad3 HZ |
792 | memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid)); |
793 | memcpy(&child_device_obj->dev_instance, instance, | |
90c9960e | 794 | sizeof(struct hv_guid)); |
3e7ee490 | 795 | |
3e7ee490 | 796 | |
3e7ee490 HJ |
797 | return child_device_obj; |
798 | } | |
799 | ||
3e189519 | 800 | /* |
e13a0b5a | 801 | * vmbus_child_device_register - Register the child device |
90c9960e | 802 | */ |
3ca07cb0 | 803 | int vmbus_child_device_register(struct hv_device *child_device_obj) |
3e7ee490 | 804 | { |
90c9960e | 805 | int ret = 0; |
6bad88da | 806 | |
f4888417 | 807 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 808 | |
90c9960e | 809 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
6bad88da | 810 | child_device_obj); |
454f18a9 | 811 | |
1bb40a25 | 812 | /* Set the device name. Otherwise, device_register() will fail. */ |
6bad88da | 813 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
90c9960e | 814 | atomic_inc_return(&device_num)); |
3e7ee490 | 815 | |
454f18a9 | 816 | /* The new device belongs to this bus */ |
04677c08 | 817 | child_device_obj->device.bus = &hv_bus.bus; /* device->dev.bus; */ |
800b6902 | 818 | child_device_obj->device.parent = &hv_pci_dev->dev; |
6bad88da | 819 | child_device_obj->device.release = vmbus_device_release; |
3e7ee490 | 820 | |
90c9960e GKH |
821 | /* |
822 | * Register with the LDM. This will kick off the driver/device | |
823 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
824 | */ | |
6bad88da | 825 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 826 | |
454f18a9 | 827 | /* vmbus_probe() error does not get propergate to device_register(). */ |
6bad88da | 828 | ret = child_device_obj->probe_error; |
3e7ee490 HJ |
829 | |
830 | if (ret) | |
90c9960e | 831 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
6bad88da | 832 | &child_device_obj->device); |
3e7ee490 | 833 | else |
90c9960e | 834 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
6bad88da | 835 | &child_device_obj->device); |
3e7ee490 | 836 | |
3e7ee490 HJ |
837 | return ret; |
838 | } | |
839 | ||
3e189519 HJ |
840 | /* |
841 | * vmbus_child_device_unregister - Remove the specified child device | |
842 | * from the vmbus. | |
90c9960e | 843 | */ |
9d8bd71a | 844 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 845 | { |
3e7ee490 | 846 | |
90c9960e | 847 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
6bad88da | 848 | &device_obj->device); |
3e7ee490 | 849 | |
90c9960e GKH |
850 | /* |
851 | * Kick off the process of unregistering the device. | |
852 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
853 | */ | |
6bad88da | 854 | device_unregister(&device_obj->device); |
3e7ee490 | 855 | |
90c9960e | 856 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
6bad88da | 857 | &device_obj->device); |
3e7ee490 HJ |
858 | } |
859 | ||
3e7ee490 | 860 | |
1168ac22 S |
861 | static int __devinit hv_pci_probe(struct pci_dev *pdev, |
862 | const struct pci_device_id *ent) | |
3e7ee490 | 863 | { |
1168ac22 | 864 | int err; |
3e7ee490 | 865 | |
1168ac22 | 866 | hv_pci_dev = pdev; |
c22090fa | 867 | |
1168ac22 S |
868 | err = pci_enable_device(pdev); |
869 | if (err) | |
870 | return err; | |
3e7ee490 | 871 | |
52e5c1ce | 872 | err = vmbus_bus_init(pdev); |
1168ac22 S |
873 | if (err) |
874 | pci_disable_device(pdev); | |
875 | ||
876 | return err; | |
3e7ee490 HJ |
877 | } |
878 | ||
9a775dbd GKH |
879 | /* |
880 | * We use a PCI table to determine if we should autoload this driver This is | |
881 | * needed by distro tools to determine if the hyperv drivers should be | |
882 | * installed and/or configured. We don't do anything else with the table, but | |
883 | * it needs to be present. | |
9a775dbd | 884 | */ |
15f0beb1 | 885 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
886 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
887 | { 0 } | |
888 | }; | |
889 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
890 | ||
1168ac22 S |
891 | static struct pci_driver hv_bus_driver = { |
892 | .name = "hv_bus", | |
893 | .probe = hv_pci_probe, | |
894 | .id_table = microsoft_hv_pci_table, | |
895 | }; | |
896 | ||
897 | static int __init hv_pci_init(void) | |
898 | { | |
899 | return pci_register_driver(&hv_bus_driver); | |
900 | } | |
901 | ||
902 | static void __exit hv_pci_exit(void) | |
903 | { | |
904 | vmbus_bus_exit(); | |
905 | pci_unregister_driver(&hv_bus_driver); | |
906 | } | |
907 | ||
908 | ||
909 | ||
90c9960e | 910 | MODULE_LICENSE("GPL"); |
26c14cc1 | 911 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 | 912 | module_param(vmbus_loglevel, int, S_IRUGO); |
3e7ee490 | 913 | |
1168ac22 S |
914 | module_init(hv_pci_init); |
915 | module_exit(hv_pci_exit); |