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3e7ee490 HJ |
1 | /* |
2 | * | |
3 | * Copyright (c) 2009, Microsoft Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
17 | * | |
18 | * Authors: | |
19 | * Haiyang Zhang <haiyangz@microsoft.com> | |
20 | * Hank Janssen <hjanssen@microsoft.com> | |
21 | * | |
22 | */ | |
23 | ||
24 | ||
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> | |
4983b39a | 31 | #include "osd.h" |
645954c5 | 32 | #include "logging.h" |
870cde80 | 33 | #include "vmbus.h" |
3e7ee490 | 34 | |
3e7ee490 | 35 | |
454f18a9 BP |
36 | /* Defines */ |
37 | ||
38 | ||
39 | /* FIXME! We need to do this dynamically for PIC and APIC system */ | |
3e7ee490 | 40 | #define VMBUS_IRQ 0x5 |
3e7ee490 | 41 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR |
3e7ee490 | 42 | |
454f18a9 BP |
43 | /* Data types */ |
44 | ||
45 | ||
46 | /* Main vmbus driver data structure */ | |
3e7ee490 | 47 | struct vmbus_driver_context { |
454f18a9 BP |
48 | /* !! These must be the first 2 fields !! */ |
49 | /* The driver field is not used in here. Instead, the bus field is */ | |
50 | /* used to represent the driver */ | |
3e7ee490 | 51 | struct driver_context drv_ctx; |
ee3d7ddf | 52 | struct vmbus_driver drv_obj; |
3e7ee490 HJ |
53 | |
54 | struct bus_type bus; | |
55 | struct tasklet_struct msg_dpc; | |
56 | struct tasklet_struct event_dpc; | |
57 | ||
454f18a9 | 58 | /* The bus root device */ |
3e7ee490 HJ |
59 | struct device_context device_ctx; |
60 | }; | |
61 | ||
454f18a9 BP |
62 | |
63 | /* Static decl */ | |
64 | ||
3e7ee490 HJ |
65 | static int vmbus_match(struct device *device, struct device_driver *driver); |
66 | static int vmbus_probe(struct device *device); | |
67 | static int vmbus_remove(struct device *device); | |
68 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 69 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 HJ |
70 | static void vmbus_msg_dpc(unsigned long data); |
71 | static void vmbus_event_dpc(unsigned long data); | |
72 | ||
3e7ee490 | 73 | static irqreturn_t vmbus_isr(int irq, void* dev_id); |
3e7ee490 HJ |
74 | |
75 | static void vmbus_device_release(struct device *device); | |
76 | static void vmbus_bus_release(struct device *device); | |
77 | ||
daaa8cc3 | 78 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, struct hv_guid *instance, void *context); |
3d3b5518 NP |
79 | static void vmbus_child_device_destroy(struct hv_device *device_obj); |
80 | static int vmbus_child_device_register(struct hv_device *root_device_obj, struct hv_device *child_device_obj); | |
81 | static void vmbus_child_device_unregister(struct hv_device *child_device_obj); | |
ee3d7ddf | 82 | static void vmbus_child_device_get_info(struct hv_device *device_obj, struct hv_device_info *device_info); |
3e7ee490 | 83 | |
454f18a9 BP |
84 | /* static ssize_t vmbus_show_class_id(struct device *dev, struct device_attribute *attr, char *buf); */ |
85 | /* static ssize_t vmbus_show_device_id(struct device *dev, struct device_attribute *attr, char *buf); */ | |
3e7ee490 HJ |
86 | |
87 | static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribute *dev_attr, char *buf); | |
88 | ||
3e7ee490 | 89 | |
454f18a9 BP |
90 | /* Global */ |
91 | ||
3e7ee490 | 92 | |
454f18a9 BP |
93 | /* Global logging setting */ |
94 | ||
95 | /* unsigned int vmbus_loglevel= (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
96 | /* unsigned int vmbus_loglevel= (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
97 | unsigned int vmbus_loglevel= (ALL_MODULES << 16 | INFO_LVL); |
98 | EXPORT_SYMBOL(vmbus_loglevel); | |
99 | ||
100 | static int vmbus_irq = VMBUS_IRQ; | |
101 | ||
454f18a9 BP |
102 | /* Setup /proc/sys/bus/vmbus/vmbus_loglevel */ |
103 | /* Allow usage of sysctl cmd to set the logging level */ | |
454f18a9 BP |
104 | |
105 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ | |
106 | ||
3e7ee490 HJ |
107 | static struct device_attribute vmbus_device_attrs[] = { |
108 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
109 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
110 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
111 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
112 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
113 | ||
114 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
115 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
116 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
117 | ||
118 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
119 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
120 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
121 | ||
122 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
123 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
124 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
125 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
126 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
127 | ||
128 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
129 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
130 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
131 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
132 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
133 | __ATTR_NULL | |
134 | }; | |
3e7ee490 | 135 | |
454f18a9 | 136 | /* The one and only one */ |
3e7ee490 HJ |
137 | static struct vmbus_driver_context g_vmbus_drv={ |
138 | .bus.name = "vmbus", | |
139 | .bus.match = vmbus_match, | |
3e7ee490 HJ |
140 | .bus.shutdown = vmbus_shutdown, |
141 | .bus.remove = vmbus_remove, | |
142 | .bus.probe = vmbus_probe, | |
143 | .bus.uevent = vmbus_uevent, | |
144 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
145 | }; |
146 | ||
454f18a9 BP |
147 | |
148 | /* Routines */ | |
149 | ||
3e7ee490 HJ |
150 | |
151 | ||
152 | /*++ | |
153 | ||
154 | Name: vmbus_show_device_attr() | |
155 | ||
156 | Desc: Show the device attribute in sysfs. This is invoked when user does a "cat /sys/bus/vmbus/devices/<bus device>/<attr name>" | |
157 | ||
158 | --*/ | |
159 | static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribute *dev_attr, char *buf) | |
160 | { | |
161 | struct device_context *device_ctx = device_to_device_context(dev); | |
ee3d7ddf | 162 | struct hv_device_info device_info; |
3e7ee490 | 163 | |
ee3d7ddf | 164 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 HJ |
165 | |
166 | vmbus_child_device_get_info(&device_ctx->device_obj, &device_info); | |
167 | ||
168 | if (!strcmp(dev_attr->attr.name, "class_id")) | |
169 | { | |
170 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
caf26a31 GKH |
171 | device_info.ChannelType.data[3], device_info.ChannelType.data[2], |
172 | device_info.ChannelType.data[1], device_info.ChannelType.data[0], | |
173 | device_info.ChannelType.data[5], device_info.ChannelType.data[4], | |
174 | device_info.ChannelType.data[7], device_info.ChannelType.data[6], | |
175 | device_info.ChannelType.data[8], device_info.ChannelType.data[9], | |
176 | device_info.ChannelType.data[10], device_info.ChannelType.data[11], | |
177 | device_info.ChannelType.data[12], device_info.ChannelType.data[13], | |
178 | device_info.ChannelType.data[14], device_info.ChannelType.data[15]); | |
3e7ee490 HJ |
179 | |
180 | } | |
181 | else if (!strcmp(dev_attr->attr.name, "device_id")) | |
182 | { | |
183 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
caf26a31 GKH |
184 | device_info.ChannelInstance.data[3], device_info.ChannelInstance.data[2], |
185 | device_info.ChannelInstance.data[1], device_info.ChannelInstance.data[0], | |
186 | device_info.ChannelInstance.data[5], device_info.ChannelInstance.data[4], | |
187 | device_info.ChannelInstance.data[7], device_info.ChannelInstance.data[6], | |
188 | device_info.ChannelInstance.data[8], device_info.ChannelInstance.data[9], | |
189 | device_info.ChannelInstance.data[10], device_info.ChannelInstance.data[11], | |
190 | device_info.ChannelInstance.data[12], device_info.ChannelInstance.data[13], | |
191 | device_info.ChannelInstance.data[14], device_info.ChannelInstance.data[15]); | |
3e7ee490 HJ |
192 | } |
193 | else if (!strcmp(dev_attr->attr.name, "state")) | |
194 | { | |
195 | return sprintf(buf, "%d\n", device_info.ChannelState); | |
196 | } | |
197 | else if (!strcmp(dev_attr->attr.name, "id")) | |
198 | { | |
199 | return sprintf(buf, "%d\n", device_info.ChannelId); | |
200 | } | |
201 | else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) | |
202 | { | |
203 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); | |
204 | } | |
205 | else if (!strcmp(dev_attr->attr.name, "out_read_index")) | |
206 | { | |
207 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); | |
208 | } | |
209 | else if (!strcmp(dev_attr->attr.name, "out_write_index")) | |
210 | { | |
211 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); | |
212 | } | |
213 | else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) | |
214 | { | |
215 | return sprintf(buf, "%d\n", device_info.Outbound.BytesAvailToRead); | |
216 | } | |
217 | else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) | |
218 | { | |
219 | return sprintf(buf, "%d\n", device_info.Outbound.BytesAvailToWrite); | |
220 | } | |
221 | else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) | |
222 | { | |
223 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); | |
224 | } | |
225 | else if (!strcmp(dev_attr->attr.name, "in_read_index")) | |
226 | { | |
227 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); | |
228 | } | |
229 | else if (!strcmp(dev_attr->attr.name, "in_write_index")) | |
230 | { | |
231 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); | |
232 | } | |
233 | else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) | |
234 | { | |
235 | return sprintf(buf, "%d\n", device_info.Inbound.BytesAvailToRead); | |
236 | } | |
237 | else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) | |
238 | { | |
239 | return sprintf(buf, "%d\n", device_info.Inbound.BytesAvailToWrite); | |
240 | } | |
241 | else if (!strcmp(dev_attr->attr.name, "monitor_id")) | |
242 | { | |
243 | return sprintf(buf, "%d\n", device_info.MonitorId); | |
244 | } | |
245 | else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) | |
246 | { | |
247 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); | |
248 | } | |
249 | else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) | |
250 | { | |
251 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); | |
252 | } | |
253 | else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) | |
254 | { | |
255 | return sprintf(buf, "%d\n", device_info.ServerMonitorConnectionId); | |
256 | } | |
257 | else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) | |
258 | { | |
259 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); | |
260 | } | |
261 | else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) | |
262 | { | |
263 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); | |
264 | } | |
265 | else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) | |
266 | { | |
267 | return sprintf(buf, "%d\n", device_info.ClientMonitorConnectionId); | |
268 | } | |
269 | else | |
270 | { | |
271 | return 0; | |
272 | } | |
273 | } | |
274 | ||
275 | /*++ | |
276 | ||
277 | Name: vmbus_show_class_id() | |
278 | ||
279 | Desc: Show the device class id in sysfs | |
280 | ||
281 | --*/ | |
454f18a9 BP |
282 | /* static ssize_t vmbus_show_class_id(struct device *dev, struct device_attribute *attr, char *buf) */ |
283 | /* { */ | |
284 | /* struct device_context *device_ctx = device_to_device_context(dev); */ | |
285 | /* return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", */ | |
286 | /* device_ctx->class_id[3], device_ctx->class_id[2], device_ctx->class_id[1], device_ctx->class_id[0], */ | |
287 | /* device_ctx->class_id[5], device_ctx->class_id[4], */ | |
288 | /* device_ctx->class_id[7], device_ctx->class_id[6], */ | |
289 | /* device_ctx->class_id[8], device_ctx->class_id[9], device_ctx->class_id[10], device_ctx->class_id[11], device_ctx->class_id[12], device_ctx->class_id[13], device_ctx->class_id[14], device_ctx->class_id[15]); */ | |
290 | /* } */ | |
3e7ee490 HJ |
291 | |
292 | /*++ | |
293 | ||
294 | Name: vmbus_show_device_id() | |
295 | ||
296 | Desc: Show the device instance id in sysfs | |
297 | ||
298 | --*/ | |
454f18a9 BP |
299 | /* static ssize_t vmbus_show_device_id(struct device *dev, struct device_attribute *attr, char *buf) */ |
300 | /* { */ | |
301 | /* struct device_context *device_ctx = device_to_device_context(dev); */ | |
302 | /* return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", */ | |
303 | /* device_ctx->device_id[3], device_ctx->device_id[2], device_ctx->device_id[1], device_ctx->device_id[0], */ | |
304 | /* device_ctx->device_id[5], device_ctx->device_id[4], */ | |
305 | /* device_ctx->device_id[7], device_ctx->device_id[6], */ | |
306 | /* device_ctx->device_id[8], device_ctx->device_id[9], device_ctx->device_id[10], device_ctx->device_id[11], device_ctx->device_id[12], device_ctx->device_id[13], device_ctx->device_id[14], device_ctx->device_id[15]); */ | |
307 | /* } */ | |
3e7ee490 HJ |
308 | |
309 | /*++ | |
310 | ||
311 | Name: vmbus_bus_init() | |
312 | ||
313 | Desc: Main vmbus driver initialization routine. Here, we | |
314 | - initialize the vmbus driver context | |
315 | - setup various driver entry points | |
316 | - invoke the vmbus hv main init routine | |
317 | - get the irq resource | |
318 | - invoke the vmbus to add the vmbus root device | |
319 | - setup the vmbus root device | |
320 | - retrieve the channel offers | |
321 | --*/ | |
bd1de709 | 322 | static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) |
3e7ee490 HJ |
323 | { |
324 | int ret=0; | |
325 | unsigned int vector=0; | |
326 | ||
327 | struct vmbus_driver_context *vmbus_drv_ctx=&g_vmbus_drv; | |
ee3d7ddf | 328 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
329 | |
330 | struct device_context *dev_ctx=&g_vmbus_drv.device_ctx; | |
331 | ||
332 | DPRINT_ENTER(VMBUS_DRV); | |
333 | ||
454f18a9 | 334 | /* Set this up to allow lower layer to callback to add/remove child devices on the bus */ |
3e7ee490 HJ |
335 | vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; |
336 | vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; | |
337 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; | |
338 | vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister; | |
339 | ||
454f18a9 | 340 | /* Call to bus driver to initialize */ |
3e7ee490 HJ |
341 | ret = pfn_drv_init(&vmbus_drv_obj->Base); |
342 | if (ret != 0) | |
343 | { | |
344 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); | |
345 | goto cleanup; | |
346 | } | |
347 | ||
454f18a9 | 348 | /* Sanity checks */ |
3e7ee490 HJ |
349 | if (!vmbus_drv_obj->Base.OnDeviceAdd) |
350 | { | |
351 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); | |
352 | ret = -1; | |
353 | goto cleanup; | |
354 | } | |
355 | ||
356 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; | |
357 | ||
454f18a9 | 358 | /* Initialize the bus context */ |
3e7ee490 HJ |
359 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, (unsigned long)vmbus_drv_obj); |
360 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, (unsigned long)vmbus_drv_obj); | |
361 | ||
454f18a9 | 362 | /* Now, register the bus driver with LDM */ |
c19fbca3 BP |
363 | ret = bus_register(&vmbus_drv_ctx->bus); |
364 | if (ret) | |
365 | { | |
366 | ret = -1; | |
367 | goto cleanup; | |
368 | } | |
3e7ee490 | 369 | |
454f18a9 | 370 | /* Get the interrupt resource */ |
3e7ee490 HJ |
371 | ret = request_irq(vmbus_irq, |
372 | vmbus_isr, | |
373 | IRQF_SAMPLE_RANDOM, | |
374 | vmbus_drv_obj->Base.name, | |
375 | NULL); | |
3e7ee490 HJ |
376 | |
377 | if (ret != 0) | |
378 | { | |
379 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", vmbus_irq); | |
380 | ||
381 | bus_unregister(&vmbus_drv_ctx->bus); | |
382 | ||
383 | ret = -1; | |
384 | goto cleanup; | |
385 | } | |
3e7ee490 | 386 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
387 | |
388 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
389 | ||
454f18a9 | 390 | /* Call to bus driver to add the root device */ |
3e7ee490 HJ |
391 | memset(dev_ctx, 0, sizeof(struct device_context)); |
392 | ||
393 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); | |
394 | if (ret != 0) | |
395 | { | |
396 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to add vmbus root device"); | |
397 | ||
398 | free_irq(vmbus_irq, NULL); | |
399 | ||
400 | bus_unregister(&vmbus_drv_ctx->bus); | |
401 | ||
402 | ret = -1; | |
403 | goto cleanup; | |
404 | } | |
454f18a9 | 405 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 406 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
caf26a31 GKH |
407 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, sizeof(struct hv_guid)); |
408 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, sizeof(struct hv_guid)); | |
3e7ee490 | 409 | |
454f18a9 | 410 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 411 | dev_ctx->device.parent = NULL; |
454f18a9 | 412 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; /* NULL; vmbus_remove() does not get invoked */ |
3e7ee490 | 413 | |
454f18a9 | 414 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
415 | dev_ctx->device.release = vmbus_bus_release; |
416 | ||
454f18a9 | 417 | /* Setup the bus as root device */ |
5d48a1c2 BP |
418 | ret = device_register(&dev_ctx->device); |
419 | if (ret) | |
420 | { | |
421 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to register vmbus root device"); | |
422 | ||
423 | free_irq(vmbus_irq, NULL); | |
424 | bus_unregister(&vmbus_drv_ctx->bus); | |
425 | ||
426 | ret = -1; | |
427 | goto cleanup; | |
428 | } | |
429 | ||
3e7ee490 HJ |
430 | |
431 | vmbus_drv_obj->GetChannelOffers(); | |
432 | ||
433 | cleanup: | |
434 | DPRINT_EXIT(VMBUS_DRV); | |
435 | ||
436 | return ret; | |
437 | } | |
438 | ||
439 | ||
440 | /*++ | |
441 | ||
442 | Name: vmbus_bus_exit() | |
443 | ||
444 | Desc: Terminate the vmbus driver. This routine is opposite of vmbus_bus_init() | |
445 | ||
446 | --*/ | |
bd1de709 | 447 | static void vmbus_bus_exit(void) |
3e7ee490 | 448 | { |
ee3d7ddf | 449 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
450 | struct vmbus_driver_context *vmbus_drv_ctx=&g_vmbus_drv; |
451 | ||
452 | struct device_context *dev_ctx=&g_vmbus_drv.device_ctx; | |
453 | ||
454 | DPRINT_ENTER(VMBUS_DRV); | |
455 | ||
454f18a9 | 456 | /* Remove the root device */ |
3e7ee490 HJ |
457 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
458 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
459 | ||
460 | if (vmbus_drv_obj->Base.OnCleanup) | |
461 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
462 | ||
454f18a9 | 463 | /* Unregister the root bus device */ |
3e7ee490 HJ |
464 | device_unregister(&dev_ctx->device); |
465 | ||
466 | bus_unregister(&vmbus_drv_ctx->bus); | |
467 | ||
468 | free_irq(vmbus_irq, NULL); | |
469 | ||
470 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
471 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
472 | ||
473 | DPRINT_EXIT(VMBUS_DRV); | |
474 | ||
475 | return; | |
476 | } | |
477 | ||
478 | /*++ | |
479 | ||
480 | Name: vmbus_child_driver_register() | |
481 | ||
482 | Desc: Register a vmbus's child driver | |
483 | ||
484 | --*/ | |
5d48a1c2 | 485 | int vmbus_child_driver_register(struct driver_context* driver_ctx) |
3e7ee490 | 486 | { |
ee3d7ddf | 487 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 488 | int ret; |
3e7ee490 HJ |
489 | |
490 | DPRINT_ENTER(VMBUS_DRV); | |
491 | ||
492 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", driver_ctx, driver_ctx->driver.name); | |
493 | ||
454f18a9 | 494 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
495 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
496 | ||
5d48a1c2 | 497 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
498 | |
499 | vmbus_drv_obj->GetChannelOffers(); | |
500 | ||
501 | DPRINT_EXIT(VMBUS_DRV); | |
5d48a1c2 BP |
502 | |
503 | return ret; | |
3e7ee490 HJ |
504 | } |
505 | ||
506 | EXPORT_SYMBOL(vmbus_child_driver_register); | |
507 | ||
508 | /*++ | |
509 | ||
510 | Name: vmbus_child_driver_unregister() | |
511 | ||
512 | Desc: Unregister a vmbus's child driver | |
513 | ||
514 | --*/ | |
515 | void vmbus_child_driver_unregister(struct driver_context* driver_ctx) | |
516 | { | |
517 | DPRINT_ENTER(VMBUS_DRV); | |
518 | ||
519 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", driver_ctx, driver_ctx->driver.name); | |
520 | ||
521 | driver_unregister(&driver_ctx->driver); | |
522 | ||
523 | driver_ctx->driver.bus = NULL; | |
524 | ||
525 | DPRINT_EXIT(VMBUS_DRV); | |
526 | } | |
527 | ||
528 | EXPORT_SYMBOL(vmbus_child_driver_unregister); | |
529 | ||
530 | /*++ | |
531 | ||
532 | Name: vmbus_get_interface() | |
533 | ||
534 | Desc: Get the vmbus channel interface. This is invoked by child/client driver that sits | |
535 | above vmbus | |
536 | --*/ | |
ee3d7ddf | 537 | void vmbus_get_interface(struct vmbus_channel_interface *interface) |
3e7ee490 | 538 | { |
ee3d7ddf | 539 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
540 | |
541 | vmbus_drv_obj->GetChannelInterface(interface); | |
542 | } | |
543 | ||
544 | EXPORT_SYMBOL(vmbus_get_interface); | |
545 | ||
546 | ||
547 | /*++ | |
548 | ||
549 | Name: vmbus_child_device_get_info() | |
550 | ||
551 | Desc: Get the vmbus child device info. This is invoked to display various device attributes in sysfs. | |
552 | --*/ | |
ee3d7ddf | 553 | static void vmbus_child_device_get_info(struct hv_device *device_obj, struct hv_device_info *device_info) |
3e7ee490 | 554 | { |
ee3d7ddf | 555 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
556 | |
557 | vmbus_drv_obj->GetChannelInfo(device_obj, device_info); | |
558 | } | |
559 | ||
560 | ||
561 | /*++ | |
562 | ||
563 | Name: vmbus_child_device_create() | |
564 | ||
565 | Desc: Creates and registers a new child device on the vmbus. | |
566 | ||
567 | --*/ | |
daaa8cc3 GKH |
568 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
569 | struct hv_guid *instance, | |
570 | void *context) | |
3e7ee490 HJ |
571 | { |
572 | struct device_context *child_device_ctx; | |
3d3b5518 | 573 | struct hv_device *child_device_obj; |
3e7ee490 HJ |
574 | |
575 | DPRINT_ENTER(VMBUS_DRV); | |
576 | ||
454f18a9 | 577 | /* Allocate the new child device */ |
3e7ee490 HJ |
578 | child_device_ctx = kzalloc(sizeof(struct device_context), GFP_KERNEL); |
579 | if (!child_device_ctx) | |
580 | { | |
581 | DPRINT_ERR(VMBUS_DRV, "unable to allocate device_context for child device"); | |
582 | DPRINT_EXIT(VMBUS_DRV); | |
583 | ||
584 | return NULL; | |
585 | } | |
586 | ||
587 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
588 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}," | |
589 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}", | |
590 | &child_device_ctx->device, | |
daaa8cc3 GKH |
591 | type->data[3], type->data[2], type->data[1], type->data[0], |
592 | type->data[5], type->data[4], type->data[7], type->data[6], | |
593 | type->data[8], type->data[9], type->data[10], type->data[11], | |
594 | type->data[12], type->data[13], type->data[14], type->data[15], | |
595 | instance->data[3], instance->data[2], instance->data[1], instance->data[0], | |
596 | instance->data[5], instance->data[4], instance->data[7], instance->data[6], | |
597 | instance->data[8], instance->data[9], instance->data[10], instance->data[11], | |
598 | instance->data[12], instance->data[13], instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
599 | |
600 | child_device_obj = &child_device_ctx->device_obj; | |
601 | child_device_obj->context = context; | |
caf26a31 GKH |
602 | memcpy(&child_device_obj->deviceType, &type, sizeof(struct hv_guid)); |
603 | memcpy(&child_device_obj->deviceInstance, &instance, sizeof(struct hv_guid)); | |
3e7ee490 | 604 | |
caf26a31 GKH |
605 | memcpy(&child_device_ctx->class_id, &type, sizeof(struct hv_guid)); |
606 | memcpy(&child_device_ctx->device_id, &instance, sizeof(struct hv_guid)); | |
3e7ee490 HJ |
607 | |
608 | DPRINT_EXIT(VMBUS_DRV); | |
609 | ||
610 | return child_device_obj; | |
611 | } | |
612 | ||
613 | /*++ | |
614 | ||
615 | Name: vmbus_child_device_register() | |
616 | ||
617 | Desc: Register the child device on the specified bus | |
618 | ||
619 | --*/ | |
3d3b5518 | 620 | static int vmbus_child_device_register(struct hv_device *root_device_obj, struct hv_device *child_device_obj) |
3e7ee490 HJ |
621 | { |
622 | int ret=0; | |
623 | struct device_context *root_device_ctx = to_device_context(root_device_obj); | |
624 | struct device_context *child_device_ctx = to_device_context(child_device_obj); | |
f4888417 | 625 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 HJ |
626 | |
627 | DPRINT_ENTER(VMBUS_DRV); | |
628 | ||
629 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", child_device_ctx); | |
454f18a9 BP |
630 | |
631 | /* Make sure we are not registered already */ | |
632 | ||
09d50ff8 | 633 | if (strlen(dev_name(&child_device_ctx->device)) != 0) |
3e7ee490 | 634 | { |
09d50ff8 | 635 | DPRINT_ERR(VMBUS_DRV, "child device (%p) already registered - busid %s", child_device_ctx, dev_name(&child_device_ctx->device)); |
3e7ee490 HJ |
636 | |
637 | ret = -1; | |
638 | goto Cleanup; | |
639 | } | |
640 | ||
454f18a9 | 641 | /* Set the device bus id. Otherwise, device_register()will fail. */ |
f4888417 | 642 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", atomic_inc_return(&device_num)); |
3e7ee490 | 643 | |
454f18a9 BP |
644 | /* The new device belongs to this bus */ |
645 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
646 | child_device_ctx->device.parent = &root_device_ctx->device; |
647 | child_device_ctx->device.release = vmbus_device_release; | |
648 | ||
454f18a9 BP |
649 | /* Register with the LDM. This will kick off the driver/device binding...which will */ |
650 | /* eventually call vmbus_match() and vmbus_probe() */ | |
3e7ee490 HJ |
651 | ret = device_register(&child_device_ctx->device); |
652 | ||
454f18a9 | 653 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
654 | ret = child_device_ctx->probe_error; |
655 | ||
656 | if (ret) | |
b2aba7cc | 657 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", &child_device_ctx->device); |
3e7ee490 HJ |
658 | else |
659 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", &child_device_ctx->device); | |
660 | ||
661 | Cleanup: | |
662 | DPRINT_EXIT(VMBUS_DRV); | |
663 | ||
664 | return ret; | |
665 | } | |
666 | ||
667 | /*++ | |
668 | ||
669 | Name: vmbus_child_device_unregister() | |
670 | ||
671 | Desc: Remove the specified child device from the vmbus. | |
672 | ||
673 | --*/ | |
3d3b5518 | 674 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 HJ |
675 | { |
676 | struct device_context *device_ctx = to_device_context(device_obj); | |
677 | ||
678 | DPRINT_ENTER(VMBUS_DRV); | |
679 | ||
680 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", &device_ctx->device); | |
681 | ||
454f18a9 BP |
682 | /* Kick off the process of unregistering the device. */ |
683 | /* This will call vmbus_remove() and eventually vmbus_device_release() */ | |
3e7ee490 HJ |
684 | device_unregister(&device_ctx->device); |
685 | ||
686 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", &device_ctx->device); | |
687 | ||
688 | DPRINT_EXIT(VMBUS_DRV); | |
689 | } | |
690 | ||
691 | ||
692 | /*++ | |
693 | ||
694 | Name: vmbus_child_device_destroy() | |
695 | ||
696 | Desc: Destroy the specified child device on the vmbus. | |
697 | ||
698 | --*/ | |
3d3b5518 | 699 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
3e7ee490 HJ |
700 | { |
701 | DPRINT_ENTER(VMBUS_DRV); | |
702 | ||
703 | DPRINT_EXIT(VMBUS_DRV); | |
704 | } | |
705 | ||
706 | /*++ | |
707 | ||
708 | Name: vmbus_uevent() | |
709 | ||
710 | Desc: This routine is invoked when a device is added or removed on the vmbus to generate a uevent to udev in the | |
711 | userspace. The udev will then look at its rule and the uevent generated here to load the appropriate driver | |
712 | ||
713 | --*/ | |
3e7ee490 HJ |
714 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
715 | { | |
716 | struct device_context *device_ctx = device_to_device_context(device); | |
717 | int i=0; | |
718 | int len=0; | |
719 | int ret; | |
720 | ||
721 | DPRINT_ENTER(VMBUS_DRV); | |
722 | ||
723 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}", | |
caf26a31 GKH |
724 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], |
725 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
726 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
727 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
728 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
729 | device_ctx->class_id.data[10], device_ctx->class_id.data[11], | |
730 | device_ctx->class_id.data[12], device_ctx->class_id.data[13], | |
731 | device_ctx->class_id.data[14], device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
732 | |
733 | env->envp_idx = i; | |
734 | env->buflen = len; | |
735 | ret = add_uevent_var(env, | |
736 | "VMBUS_DEVICE_CLASS_GUID={%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}", | |
caf26a31 GKH |
737 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], |
738 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
739 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
740 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
741 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
742 | device_ctx->class_id.data[10], device_ctx->class_id.data[11], | |
743 | device_ctx->class_id.data[12], device_ctx->class_id.data[13], | |
744 | device_ctx->class_id.data[14], device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
745 | |
746 | if (ret) | |
747 | { | |
748 | return ret; | |
749 | } | |
750 | ||
751 | ret = add_uevent_var(env, | |
752 | "VMBUS_DEVICE_DEVICE_GUID={%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}", | |
caf26a31 GKH |
753 | device_ctx->device_id.data[3], device_ctx->device_id.data[2], |
754 | device_ctx->device_id.data[1], device_ctx->device_id.data[0], | |
755 | device_ctx->device_id.data[5], device_ctx->device_id.data[4], | |
756 | device_ctx->device_id.data[7], device_ctx->device_id.data[6], | |
757 | device_ctx->device_id.data[8], device_ctx->device_id.data[9], | |
758 | device_ctx->device_id.data[10], device_ctx->device_id.data[11], | |
759 | device_ctx->device_id.data[12], device_ctx->device_id.data[13], | |
760 | device_ctx->device_id.data[14], device_ctx->device_id.data[15]); | |
3e7ee490 HJ |
761 | |
762 | if (ret) | |
763 | { | |
764 | return ret; | |
765 | } | |
766 | ||
767 | env->envp[env->envp_idx] = NULL; | |
768 | ||
769 | DPRINT_EXIT(VMBUS_DRV); | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
3e7ee490 HJ |
774 | /*++ |
775 | ||
776 | Name: vmbus_match() | |
777 | ||
778 | Desc: Attempt to match the specified device to the specified driver | |
779 | ||
780 | --*/ | |
781 | static int vmbus_match(struct device *device, struct device_driver *driver) | |
782 | { | |
783 | int match=0; | |
784 | struct driver_context *driver_ctx = driver_to_driver_context(driver); | |
785 | struct device_context *device_ctx = device_to_device_context(device); | |
786 | ||
787 | DPRINT_ENTER(VMBUS_DRV); | |
788 | ||
454f18a9 | 789 | /* We found our driver ? */ |
caf26a31 | 790 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, sizeof(struct hv_guid)) == 0) |
3e7ee490 | 791 | { |
454f18a9 | 792 | /* !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast it here to access the */ |
775ef25e | 793 | /* struct hv_driver field */ |
3e7ee490 HJ |
794 | struct vmbus_driver_context *vmbus_drv_ctx = (struct vmbus_driver_context*)driver_ctx; |
795 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; | |
796 | DPRINT_INFO(VMBUS_DRV, "device object (%p) set to driver object (%p)", &device_ctx->device_obj, device_ctx->device_obj.Driver); | |
797 | ||
798 | match = 1; | |
799 | } | |
800 | ||
801 | DPRINT_EXIT(VMBUS_DRV); | |
802 | ||
803 | return match; | |
804 | } | |
805 | ||
806 | ||
807 | /*++ | |
808 | ||
809 | Name: vmbus_probe_failed_cb() | |
810 | ||
811 | Desc: Callback when a driver probe failed in vmbus_probe(). We need a callback because | |
812 | we cannot invoked device_unregister() inside vmbus_probe() since vmbus_probe() may be | |
813 | invoked inside device_register() i.e. we cannot call device_unregister() inside | |
814 | device_register() | |
815 | --*/ | |
3e7ee490 | 816 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 HJ |
817 | { |
818 | struct device_context *device_ctx = (struct device_context*)context; | |
819 | ||
820 | ||
821 | DPRINT_ENTER(VMBUS_DRV); | |
822 | ||
454f18a9 BP |
823 | /* Kick off the process of unregistering the device. */ |
824 | /* This will call vmbus_remove() and eventually vmbus_device_release() */ | |
3e7ee490 HJ |
825 | device_unregister(&device_ctx->device); |
826 | ||
454f18a9 | 827 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
828 | DPRINT_EXIT(VMBUS_DRV); |
829 | } | |
830 | ||
831 | ||
832 | /*++ | |
833 | ||
834 | Name: vmbus_probe() | |
835 | ||
836 | Desc: Add the new vmbus's child device | |
837 | ||
838 | --*/ | |
839 | static int vmbus_probe(struct device *child_device) | |
840 | { | |
841 | int ret=0; | |
842 | struct driver_context *driver_ctx = driver_to_driver_context(child_device->driver); | |
843 | struct device_context *device_ctx = device_to_device_context(child_device); | |
844 | ||
845 | DPRINT_ENTER(VMBUS_DRV); | |
846 | ||
454f18a9 | 847 | /* Let the specific open-source driver handles the probe if it can */ |
3e7ee490 HJ |
848 | if (driver_ctx->probe) |
849 | { | |
850 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); | |
851 | if (ret != 0) | |
852 | { | |
09d50ff8 | 853 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s (%p) on driver %s (%d)...", dev_name(child_device), child_device, child_device->driver->name, ret); |
3e7ee490 | 854 | |
3e7ee490 | 855 | INIT_WORK(&device_ctx->probe_failed_work_item, vmbus_probe_failed_cb); |
3e7ee490 HJ |
856 | schedule_work(&device_ctx->probe_failed_work_item); |
857 | } | |
858 | } | |
859 | else | |
860 | { | |
861 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", child_device->driver->name); | |
862 | ret = -1; | |
863 | } | |
864 | ||
865 | DPRINT_EXIT(VMBUS_DRV); | |
866 | return ret; | |
867 | } | |
868 | ||
869 | ||
870 | /*++ | |
871 | ||
872 | Name: vmbus_remove() | |
873 | ||
874 | Desc: Remove a vmbus device | |
875 | ||
876 | --*/ | |
877 | static int vmbus_remove(struct device *child_device) | |
878 | { | |
879 | int ret=0; | |
880 | struct driver_context *driver_ctx; | |
881 | ||
882 | DPRINT_ENTER(VMBUS_DRV); | |
883 | ||
454f18a9 | 884 | /* Special case root bus device */ |
3e7ee490 HJ |
885 | if (child_device->parent == NULL) |
886 | { | |
454f18a9 | 887 | /* No-op since it is statically defined and handle in vmbus_bus_exit() */ |
3e7ee490 HJ |
888 | DPRINT_EXIT(VMBUS_DRV); |
889 | return 0; | |
890 | } | |
891 | ||
892 | if (child_device->driver) | |
893 | { | |
894 | driver_ctx = driver_to_driver_context(child_device->driver); | |
895 | ||
454f18a9 | 896 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 HJ |
897 | if (driver_ctx->remove) |
898 | { | |
899 | ret = driver_ctx->remove(child_device); | |
900 | } | |
901 | else | |
902 | { | |
903 | DPRINT_ERR(VMBUS_DRV, "remove() method not set for driver - %s", child_device->driver->name); | |
904 | ret = -1; | |
905 | } | |
906 | } | |
907 | else | |
908 | { | |
909 | ||
910 | } | |
911 | ||
912 | DPRINT_EXIT(VMBUS_DRV); | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
917 | /*++ | |
918 | ||
919 | Name: vmbus_shutdown() | |
920 | ||
921 | Desc: Shutdown a vmbus device | |
922 | ||
923 | --*/ | |
924 | static void vmbus_shutdown(struct device *child_device) | |
925 | { | |
926 | struct driver_context *driver_ctx; | |
927 | ||
928 | DPRINT_ENTER(VMBUS_DRV); | |
929 | ||
454f18a9 | 930 | /* Special case root bus device */ |
3e7ee490 HJ |
931 | if (child_device->parent == NULL) |
932 | { | |
454f18a9 | 933 | /* No-op since it is statically defined and handle in vmbus_bus_exit() */ |
3e7ee490 HJ |
934 | DPRINT_EXIT(VMBUS_DRV); |
935 | return; | |
936 | } | |
937 | ||
454f18a9 | 938 | /* The device may not be attached yet */ |
3e7ee490 HJ |
939 | if (!child_device->driver) |
940 | { | |
941 | DPRINT_EXIT(VMBUS_DRV); | |
942 | return; | |
943 | } | |
944 | ||
945 | driver_ctx = driver_to_driver_context(child_device->driver); | |
946 | ||
454f18a9 | 947 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 HJ |
948 | if (driver_ctx->shutdown) |
949 | { | |
950 | driver_ctx->shutdown(child_device); | |
951 | } | |
952 | ||
953 | DPRINT_EXIT(VMBUS_DRV); | |
954 | ||
955 | return; | |
956 | } | |
957 | ||
958 | /*++ | |
959 | ||
960 | Name: vmbus_bus_release() | |
961 | ||
962 | Desc: Final callback release of the vmbus root device | |
963 | ||
964 | --*/ | |
965 | static void vmbus_bus_release(struct device *device) | |
966 | { | |
967 | DPRINT_ENTER(VMBUS_DRV); | |
968 | DPRINT_EXIT(VMBUS_DRV); | |
969 | } | |
970 | ||
971 | /*++ | |
972 | ||
973 | Name: vmbus_device_release() | |
974 | ||
975 | Desc: Final callback release of the vmbus child device | |
976 | ||
977 | --*/ | |
978 | static void vmbus_device_release(struct device *device) | |
979 | { | |
980 | struct device_context *device_ctx = device_to_device_context(device); | |
981 | ||
982 | DPRINT_ENTER(VMBUS_DRV); | |
983 | ||
454f18a9 | 984 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
3e7ee490 HJ |
985 | kfree(device_ctx); |
986 | ||
454f18a9 | 987 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
988 | |
989 | DPRINT_EXIT(VMBUS_DRV); | |
990 | ||
991 | return; | |
992 | } | |
993 | ||
994 | /*++ | |
995 | ||
996 | Name: vmbus_msg_dpc() | |
997 | ||
998 | Desc: Tasklet routine to handle hypervisor messages | |
999 | ||
1000 | --*/ | |
1001 | static void vmbus_msg_dpc(unsigned long data) | |
1002 | { | |
ee3d7ddf | 1003 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 HJ |
1004 | |
1005 | DPRINT_ENTER(VMBUS_DRV); | |
1006 | ||
1007 | ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); | |
1008 | ||
454f18a9 | 1009 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
1010 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
1011 | ||
1012 | DPRINT_EXIT(VMBUS_DRV); | |
1013 | } | |
1014 | ||
1015 | /*++ | |
1016 | ||
1017 | Name: vmbus_msg_dpc() | |
1018 | ||
1019 | Desc: Tasklet routine to handle hypervisor events | |
1020 | ||
1021 | --*/ | |
1022 | static void vmbus_event_dpc(unsigned long data) | |
1023 | { | |
ee3d7ddf | 1024 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 HJ |
1025 | |
1026 | DPRINT_ENTER(VMBUS_DRV); | |
1027 | ||
1028 | ASSERT(vmbus_drv_obj->OnEventDpc != NULL); | |
1029 | ||
454f18a9 | 1030 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
1031 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
1032 | ||
1033 | DPRINT_EXIT(VMBUS_DRV); | |
1034 | } | |
1035 | ||
1036 | /*++ | |
1037 | ||
1038 | Name: vmbus_msg_dpc() | |
1039 | ||
1040 | Desc: ISR routine | |
1041 | ||
1042 | --*/ | |
3e7ee490 | 1043 | static irqreturn_t vmbus_isr(int irq, void* dev_id) |
3e7ee490 HJ |
1044 | { |
1045 | int ret=0; | |
ee3d7ddf | 1046 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
1047 | |
1048 | DPRINT_ENTER(VMBUS_DRV); | |
1049 | ||
1050 | ASSERT(vmbus_driver_obj->OnIsr != NULL); | |
1051 | ||
454f18a9 | 1052 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
1053 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
1054 | ||
454f18a9 | 1055 | /* Schedules a dpc if necessary */ |
3e7ee490 HJ |
1056 | if (ret > 0) |
1057 | { | |
1058 | if (test_bit(0, (unsigned long*)&ret)) | |
1059 | { | |
1060 | tasklet_schedule(&g_vmbus_drv.msg_dpc); | |
1061 | } | |
1062 | ||
1063 | if (test_bit(1, (unsigned long*)&ret)) | |
1064 | { | |
1065 | tasklet_schedule(&g_vmbus_drv.event_dpc); | |
1066 | } | |
1067 | ||
1068 | DPRINT_EXIT(VMBUS_DRV); | |
1069 | return IRQ_HANDLED; | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | DPRINT_EXIT(VMBUS_DRV); | |
1074 | return IRQ_NONE; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | MODULE_LICENSE("GPL"); | |
1079 | ||
1080 | ||
1081 | /*++ | |
1082 | ||
1083 | Name: vmbus_init() | |
1084 | ||
1085 | Desc: Main vmbus driver entry routine | |
1086 | ||
1087 | --*/ | |
1088 | static int __init vmbus_init(void) | |
1089 | { | |
1090 | int ret=0; | |
1091 | ||
1092 | DPRINT_ENTER(VMBUS_DRV); | |
1093 | ||
1094 | DPRINT_INFO(VMBUS_DRV, | |
1095 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
1096 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
454f18a9 | 1097 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1098 | |
1099 | ret = vmbus_bus_init(VmbusInitialize); | |
1100 | ||
1101 | DPRINT_EXIT(VMBUS_DRV); | |
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | ||
1106 | ||
1107 | /*++ | |
1108 | ||
1109 | Name: vmbus_init() | |
1110 | ||
1111 | Desc: Main vmbus driver exit routine | |
1112 | ||
1113 | --*/ | |
1114 | static void __exit vmbus_exit(void) | |
1115 | { | |
1116 | DPRINT_ENTER(VMBUS_DRV); | |
1117 | ||
1118 | vmbus_bus_exit(); | |
454f18a9 | 1119 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1120 | DPRINT_EXIT(VMBUS_DRV); |
1121 | ||
1122 | return; | |
1123 | } | |
1124 | ||
3e7ee490 HJ |
1125 | module_param(vmbus_irq, int, S_IRUGO); |
1126 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1127 | |
1128 | module_init(vmbus_init); | |
1129 | module_exit(vmbus_exit); | |
454f18a9 | 1130 | /* eof */ |