Commit | Line | Data |
---|---|---|
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> | |
3e7ee490 | 20 | */ |
3e7ee490 HJ |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/irq.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/sysctl.h> | |
9a775dbd | 27 | #include <linux/pci.h> |
c22090fa | 28 | #include <linux/dmi.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
8b5d6d3b | 30 | #include <linux/completion.h> |
2d82f6c7 | 31 | #include "version_info.h" |
4983b39a | 32 | #include "osd.h" |
645954c5 | 33 | #include "logging.h" |
870cde80 | 34 | #include "vmbus.h" |
150b19d4 | 35 | #include "channel.h" |
3e7ee490 | 36 | |
3e7ee490 | 37 | |
454f18a9 | 38 | /* FIXME! We need to do this dynamically for PIC and APIC system */ |
90c9960e GKH |
39 | #define VMBUS_IRQ 0x5 |
40 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR | |
454f18a9 BP |
41 | |
42 | /* Main vmbus driver data structure */ | |
3e7ee490 | 43 | struct vmbus_driver_context { |
454f18a9 | 44 | /* !! These must be the first 2 fields !! */ |
90c9960e | 45 | /* FIXME, this is a bug */ |
454f18a9 BP |
46 | /* The driver field is not used in here. Instead, the bus field is */ |
47 | /* used to represent the driver */ | |
90c9960e | 48 | struct driver_context drv_ctx; |
ee3d7ddf | 49 | struct vmbus_driver drv_obj; |
3e7ee490 | 50 | |
90c9960e GKH |
51 | struct bus_type bus; |
52 | struct tasklet_struct msg_dpc; | |
53 | struct tasklet_struct event_dpc; | |
3e7ee490 | 54 | |
454f18a9 | 55 | /* The bus root device */ |
f916a34d | 56 | struct vm_device device_ctx; |
3e7ee490 HJ |
57 | }; |
58 | ||
3e7ee490 HJ |
59 | static int vmbus_match(struct device *device, struct device_driver *driver); |
60 | static int vmbus_probe(struct device *device); | |
61 | static int vmbus_remove(struct device *device); | |
62 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 63 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 HJ |
64 | static void vmbus_msg_dpc(unsigned long data); |
65 | static void vmbus_event_dpc(unsigned long data); | |
66 | ||
90c9960e | 67 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
68 | |
69 | static void vmbus_device_release(struct device *device); | |
70 | static void vmbus_bus_release(struct device *device); | |
71 | ||
90c9960e GKH |
72 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
73 | struct hv_guid *instance, | |
cae5b843 | 74 | struct vmbus_channel *channel); |
3d3b5518 | 75 | static void vmbus_child_device_destroy(struct hv_device *device_obj); |
90c9960e GKH |
76 | static int vmbus_child_device_register(struct hv_device *root_device_obj, |
77 | struct hv_device *child_device_obj); | |
3d3b5518 | 78 | static void vmbus_child_device_unregister(struct hv_device *child_device_obj); |
90c9960e GKH |
79 | static ssize_t vmbus_show_device_attr(struct device *dev, |
80 | struct device_attribute *dev_attr, | |
81 | char *buf); | |
3e7ee490 | 82 | |
3e7ee490 | 83 | |
90c9960e | 84 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 85 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
86 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
87 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
88 | |
89 | static int vmbus_irq = VMBUS_IRQ; | |
90 | ||
454f18a9 | 91 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
92 | static struct device_attribute vmbus_device_attrs[] = { |
93 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
94 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
98 | ||
99 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
100 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
101 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
102 | ||
103 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
106 | ||
107 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
108 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
109 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
110 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
111 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
112 | ||
113 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
114 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
115 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
116 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
117 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
118 | __ATTR_NULL | |
119 | }; | |
3e7ee490 | 120 | |
454f18a9 | 121 | /* The one and only one */ |
90c9960e GKH |
122 | static struct vmbus_driver_context g_vmbus_drv = { |
123 | .bus.name = "vmbus", | |
124 | .bus.match = vmbus_match, | |
125 | .bus.shutdown = vmbus_shutdown, | |
126 | .bus.remove = vmbus_remove, | |
127 | .bus.probe = vmbus_probe, | |
128 | .bus.uevent = vmbus_uevent, | |
129 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
130 | }; |
131 | ||
150b19d4 GKH |
132 | static void get_channel_info(struct hv_device *device, |
133 | struct hv_device_info *info) | |
134 | { | |
135 | struct vmbus_channel_debug_info debug_info; | |
136 | ||
cae5b843 | 137 | if (!device->channel) |
150b19d4 GKH |
138 | return; |
139 | ||
cae5b843 | 140 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 141 | |
c50f7fb2 HZ |
142 | info->ChannelId = debug_info.relid; |
143 | info->ChannelState = debug_info.state; | |
144 | memcpy(&info->ChannelType, &debug_info.interfacetype, | |
150b19d4 | 145 | sizeof(struct hv_guid)); |
c50f7fb2 | 146 | memcpy(&info->ChannelInstance, &debug_info.interface_instance, |
150b19d4 GKH |
147 | sizeof(struct hv_guid)); |
148 | ||
c50f7fb2 | 149 | info->MonitorId = debug_info.monitorid; |
150b19d4 | 150 | |
c50f7fb2 HZ |
151 | info->ServerMonitorPending = debug_info.servermonitor_pending; |
152 | info->ServerMonitorLatency = debug_info.servermonitor_latency; | |
153 | info->ServerMonitorConnectionId = debug_info.servermonitor_connectionid; | |
150b19d4 | 154 | |
c50f7fb2 HZ |
155 | info->ClientMonitorPending = debug_info.clientmonitor_pending; |
156 | info->ClientMonitorLatency = debug_info.clientmonitor_latency; | |
157 | info->ClientMonitorConnectionId = debug_info.clientmonitor_connectionid; | |
150b19d4 | 158 | |
82f8bd40 HZ |
159 | info->Inbound.InterruptMask = debug_info.inbound.current_interrupt_mask; |
160 | info->Inbound.ReadIndex = debug_info.inbound.current_read_index; | |
161 | info->Inbound.WriteIndex = debug_info.inbound.current_write_index; | |
162 | info->Inbound.BytesAvailToRead = debug_info.inbound.bytes_avail_toread; | |
163 | info->Inbound.BytesAvailToWrite = | |
164 | debug_info.inbound.bytes_avail_towrite; | |
165 | ||
166 | info->Outbound.InterruptMask = | |
167 | debug_info.outbound.current_interrupt_mask; | |
168 | info->Outbound.ReadIndex = debug_info.outbound.current_read_index; | |
169 | info->Outbound.WriteIndex = debug_info.outbound.current_write_index; | |
170 | info->Outbound.BytesAvailToRead = | |
171 | debug_info.outbound.bytes_avail_toread; | |
150b19d4 | 172 | info->Outbound.BytesAvailToWrite = |
82f8bd40 | 173 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
174 | } |
175 | ||
3e189519 | 176 | /* |
90c9960e GKH |
177 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
178 | * | |
179 | * This is invoked when user does a | |
180 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
181 | */ | |
182 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
183 | struct device_attribute *dev_attr, | |
184 | char *buf) | |
3e7ee490 | 185 | { |
f916a34d | 186 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 187 | struct hv_device_info device_info; |
3e7ee490 | 188 | |
ee3d7ddf | 189 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 190 | |
a4e91ed2 | 191 | get_channel_info(&device_ctx->device_obj, &device_info); |
3e7ee490 | 192 | |
90c9960e GKH |
193 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
194 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
195 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
196 | device_info.ChannelType.data[3], | |
197 | device_info.ChannelType.data[2], | |
198 | device_info.ChannelType.data[1], | |
199 | device_info.ChannelType.data[0], | |
200 | device_info.ChannelType.data[5], | |
201 | device_info.ChannelType.data[4], | |
202 | device_info.ChannelType.data[7], | |
203 | device_info.ChannelType.data[6], | |
204 | device_info.ChannelType.data[8], | |
205 | device_info.ChannelType.data[9], | |
206 | device_info.ChannelType.data[10], | |
207 | device_info.ChannelType.data[11], | |
208 | device_info.ChannelType.data[12], | |
209 | device_info.ChannelType.data[13], | |
210 | device_info.ChannelType.data[14], | |
211 | device_info.ChannelType.data[15]); | |
212 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { | |
213 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
214 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
215 | device_info.ChannelInstance.data[3], | |
216 | device_info.ChannelInstance.data[2], | |
217 | device_info.ChannelInstance.data[1], | |
218 | device_info.ChannelInstance.data[0], | |
219 | device_info.ChannelInstance.data[5], | |
220 | device_info.ChannelInstance.data[4], | |
221 | device_info.ChannelInstance.data[7], | |
222 | device_info.ChannelInstance.data[6], | |
223 | device_info.ChannelInstance.data[8], | |
224 | device_info.ChannelInstance.data[9], | |
225 | device_info.ChannelInstance.data[10], | |
226 | device_info.ChannelInstance.data[11], | |
227 | device_info.ChannelInstance.data[12], | |
228 | device_info.ChannelInstance.data[13], | |
229 | device_info.ChannelInstance.data[14], | |
230 | device_info.ChannelInstance.data[15]); | |
231 | } else if (!strcmp(dev_attr->attr.name, "state")) { | |
3e7ee490 | 232 | return sprintf(buf, "%d\n", device_info.ChannelState); |
90c9960e | 233 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
3e7ee490 | 234 | return sprintf(buf, "%d\n", device_info.ChannelId); |
90c9960e | 235 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
3e7ee490 | 236 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
90c9960e | 237 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
3e7ee490 | 238 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
90c9960e | 239 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
3e7ee490 | 240 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
90c9960e GKH |
241 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
242 | return sprintf(buf, "%d\n", | |
243 | device_info.Outbound.BytesAvailToRead); | |
244 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { | |
245 | return sprintf(buf, "%d\n", | |
246 | device_info.Outbound.BytesAvailToWrite); | |
247 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { | |
3e7ee490 | 248 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
90c9960e | 249 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
3e7ee490 | 250 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
90c9960e | 251 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
3e7ee490 | 252 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
90c9960e GKH |
253 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
254 | return sprintf(buf, "%d\n", | |
255 | device_info.Inbound.BytesAvailToRead); | |
256 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { | |
257 | return sprintf(buf, "%d\n", | |
258 | device_info.Inbound.BytesAvailToWrite); | |
259 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { | |
3e7ee490 | 260 | return sprintf(buf, "%d\n", device_info.MonitorId); |
90c9960e | 261 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
3e7ee490 | 262 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
90c9960e | 263 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
3e7ee490 | 264 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
90c9960e GKH |
265 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
266 | return sprintf(buf, "%d\n", | |
267 | device_info.ServerMonitorConnectionId); | |
268 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { | |
3e7ee490 | 269 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
90c9960e | 270 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
3e7ee490 | 271 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
90c9960e GKH |
272 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
273 | return sprintf(buf, "%d\n", | |
274 | device_info.ClientMonitorConnectionId); | |
275 | } else { | |
3e7ee490 HJ |
276 | return 0; |
277 | } | |
278 | } | |
279 | ||
3e189519 | 280 | /* |
90c9960e GKH |
281 | * vmbus_bus_init -Main vmbus driver initialization routine. |
282 | * | |
283 | * Here, we | |
0686e4f4 LL |
284 | * - initialize the vmbus driver context |
285 | * - setup various driver entry points | |
286 | * - invoke the vmbus hv main init routine | |
287 | * - get the irq resource | |
288 | * - invoke the vmbus to add the vmbus root device | |
289 | * - setup the vmbus root device | |
290 | * - retrieve the channel offers | |
90c9960e | 291 | */ |
21707bed | 292 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
3e7ee490 | 293 | { |
90c9960e | 294 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
ee3d7ddf | 295 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
f916a34d | 296 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
90c9960e GKH |
297 | int ret; |
298 | unsigned int vector; | |
3e7ee490 | 299 | |
90c9960e GKH |
300 | /* |
301 | * Set this up to allow lower layer to callback to add/remove child | |
302 | * devices on the bus | |
303 | */ | |
3e7ee490 HJ |
304 | vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; |
305 | vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; | |
306 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; | |
307 | vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister; | |
308 | ||
454f18a9 | 309 | /* Call to bus driver to initialize */ |
21707bed | 310 | ret = drv_init(&vmbus_drv_obj->Base); |
90c9960e | 311 | if (ret != 0) { |
3e7ee490 HJ |
312 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); |
313 | goto cleanup; | |
314 | } | |
315 | ||
454f18a9 | 316 | /* Sanity checks */ |
90c9960e | 317 | if (!vmbus_drv_obj->Base.OnDeviceAdd) { |
3e7ee490 HJ |
318 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
319 | ret = -1; | |
320 | goto cleanup; | |
321 | } | |
322 | ||
323 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; | |
324 | ||
454f18a9 | 325 | /* Initialize the bus context */ |
90c9960e GKH |
326 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
327 | (unsigned long)vmbus_drv_obj); | |
328 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, | |
329 | (unsigned long)vmbus_drv_obj); | |
3e7ee490 | 330 | |
454f18a9 | 331 | /* Now, register the bus driver with LDM */ |
c19fbca3 | 332 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 333 | if (ret) { |
c19fbca3 BP |
334 | ret = -1; |
335 | goto cleanup; | |
336 | } | |
3e7ee490 | 337 | |
454f18a9 | 338 | /* Get the interrupt resource */ |
90c9960e GKH |
339 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
340 | vmbus_drv_obj->Base.name, NULL); | |
3e7ee490 | 341 | |
90c9960e GKH |
342 | if (ret != 0) { |
343 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
344 | vmbus_irq); | |
3e7ee490 HJ |
345 | |
346 | bus_unregister(&vmbus_drv_ctx->bus); | |
347 | ||
348 | ret = -1; | |
349 | goto cleanup; | |
350 | } | |
3e7ee490 | 351 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
352 | |
353 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
354 | ||
454f18a9 | 355 | /* Call to bus driver to add the root device */ |
f916a34d | 356 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
3e7ee490 HJ |
357 | |
358 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); | |
90c9960e GKH |
359 | if (ret != 0) { |
360 | DPRINT_ERR(VMBUS_DRV, | |
361 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
362 | |
363 | free_irq(vmbus_irq, NULL); | |
364 | ||
365 | bus_unregister(&vmbus_drv_ctx->bus); | |
366 | ||
367 | ret = -1; | |
368 | goto cleanup; | |
369 | } | |
454f18a9 | 370 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 371 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
90c9960e GKH |
372 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, |
373 | sizeof(struct hv_guid)); | |
374 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, | |
375 | sizeof(struct hv_guid)); | |
3e7ee490 | 376 | |
454f18a9 | 377 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 378 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
379 | /* NULL; vmbus_remove() does not get invoked */ |
380 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 381 | |
454f18a9 | 382 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
383 | dev_ctx->device.release = vmbus_bus_release; |
384 | ||
454f18a9 | 385 | /* Setup the bus as root device */ |
5d48a1c2 | 386 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
387 | if (ret) { |
388 | DPRINT_ERR(VMBUS_DRV, | |
389 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
390 | |
391 | free_irq(vmbus_irq, NULL); | |
392 | bus_unregister(&vmbus_drv_ctx->bus); | |
393 | ||
394 | ret = -1; | |
395 | goto cleanup; | |
396 | } | |
397 | ||
3e7ee490 HJ |
398 | |
399 | vmbus_drv_obj->GetChannelOffers(); | |
400 | ||
8b5d6d3b HZ |
401 | wait_for_completion(&hv_channel_ready); |
402 | ||
3e7ee490 | 403 | cleanup: |
3e7ee490 HJ |
404 | return ret; |
405 | } | |
406 | ||
3e189519 | 407 | /* |
90c9960e GKH |
408 | * vmbus_bus_exit - Terminate the vmbus driver. |
409 | * | |
410 | * This routine is opposite of vmbus_bus_init() | |
411 | */ | |
bd1de709 | 412 | static void vmbus_bus_exit(void) |
3e7ee490 | 413 | { |
ee3d7ddf | 414 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 415 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
3e7ee490 | 416 | |
f916a34d | 417 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
3e7ee490 | 418 | |
454f18a9 | 419 | /* Remove the root device */ |
3e7ee490 HJ |
420 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
421 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
422 | ||
423 | if (vmbus_drv_obj->Base.OnCleanup) | |
424 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
425 | ||
454f18a9 | 426 | /* Unregister the root bus device */ |
3e7ee490 HJ |
427 | device_unregister(&dev_ctx->device); |
428 | ||
429 | bus_unregister(&vmbus_drv_ctx->bus); | |
430 | ||
431 | free_irq(vmbus_irq, NULL); | |
432 | ||
433 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
434 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
435 | } |
436 | ||
3e189519 | 437 | |
90c9960e | 438 | /** |
3e189519 HJ |
439 | * vmbus_child_driver_register() - Register a vmbus's child driver |
440 | * @driver_ctx: Pointer to driver structure you want to register | |
441 | * | |
442 | * @driver_ctx is of type &struct driver_context | |
443 | * | |
444 | * Registers the given driver with Linux through the 'driver_register()' call | |
445 | * And sets up the hyper-v vmbus handling for this driver. | |
446 | * It will return the state of the 'driver_register()' call. | |
447 | * | |
448 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
449 | */ |
450 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 451 | { |
ee3d7ddf | 452 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 453 | int ret; |
3e7ee490 | 454 | |
90c9960e GKH |
455 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
456 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 457 | |
454f18a9 | 458 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
459 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
460 | ||
5d48a1c2 | 461 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
462 | |
463 | vmbus_drv_obj->GetChannelOffers(); | |
464 | ||
5d48a1c2 | 465 | return ret; |
3e7ee490 | 466 | } |
3e7ee490 HJ |
467 | EXPORT_SYMBOL(vmbus_child_driver_register); |
468 | ||
90c9960e | 469 | /** |
3e189519 HJ |
470 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
471 | * @driver_ctx: Pointer to driver structure you want to un-register | |
472 | * | |
473 | * @driver_ctx is of type &struct driver_context | |
474 | * | |
475 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
476 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
477 | * | |
478 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
479 | */ |
480 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 | 481 | { |
90c9960e GKH |
482 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
483 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
484 | |
485 | driver_unregister(&driver_ctx->driver); | |
486 | ||
487 | driver_ctx->driver.bus = NULL; | |
3e7ee490 | 488 | } |
3e7ee490 HJ |
489 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
490 | ||
3e189519 HJ |
491 | /* |
492 | * vmbus_child_device_create - Creates and registers a new child device | |
493 | * on the vmbus. | |
90c9960e | 494 | */ |
daaa8cc3 GKH |
495 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
496 | struct hv_guid *instance, | |
cae5b843 | 497 | struct vmbus_channel *channel) |
3e7ee490 | 498 | { |
f916a34d | 499 | struct vm_device *child_device_ctx; |
3d3b5518 | 500 | struct hv_device *child_device_obj; |
3e7ee490 | 501 | |
454f18a9 | 502 | /* Allocate the new child device */ |
f916a34d | 503 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
504 | if (!child_device_ctx) { |
505 | DPRINT_ERR(VMBUS_DRV, | |
506 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
507 | return NULL; |
508 | } | |
509 | ||
510 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
511 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
512 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
513 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
514 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 515 | &child_device_ctx->device, |
daaa8cc3 GKH |
516 | type->data[3], type->data[2], type->data[1], type->data[0], |
517 | type->data[5], type->data[4], type->data[7], type->data[6], | |
518 | type->data[8], type->data[9], type->data[10], type->data[11], | |
519 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
520 | instance->data[3], instance->data[2], |
521 | instance->data[1], instance->data[0], | |
522 | instance->data[5], instance->data[4], | |
523 | instance->data[7], instance->data[6], | |
524 | instance->data[8], instance->data[9], | |
525 | instance->data[10], instance->data[11], | |
526 | instance->data[12], instance->data[13], | |
527 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
528 | |
529 | child_device_obj = &child_device_ctx->device_obj; | |
cae5b843 | 530 | child_device_obj->channel = channel; |
9fb5cce4 MD |
531 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
532 | memcpy(&child_device_obj->deviceInstance, instance, | |
90c9960e | 533 | sizeof(struct hv_guid)); |
3e7ee490 | 534 | |
9fb5cce4 MD |
535 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
536 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 | 537 | |
3e7ee490 HJ |
538 | return child_device_obj; |
539 | } | |
540 | ||
3e189519 | 541 | /* |
90c9960e GKH |
542 | * vmbus_child_device_register - Register the child device on the specified bus |
543 | */ | |
544 | static int vmbus_child_device_register(struct hv_device *root_device_obj, | |
545 | struct hv_device *child_device_obj) | |
3e7ee490 | 546 | { |
90c9960e | 547 | int ret = 0; |
f916a34d HZ |
548 | struct vm_device *root_device_ctx = |
549 | to_vm_device(root_device_obj); | |
550 | struct vm_device *child_device_ctx = | |
551 | to_vm_device(child_device_obj); | |
f4888417 | 552 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 553 | |
90c9960e GKH |
554 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
555 | child_device_ctx); | |
454f18a9 | 556 | |
1bb40a25 | 557 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
558 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
559 | atomic_inc_return(&device_num)); | |
3e7ee490 | 560 | |
454f18a9 BP |
561 | /* The new device belongs to this bus */ |
562 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
563 | child_device_ctx->device.parent = &root_device_ctx->device; |
564 | child_device_ctx->device.release = vmbus_device_release; | |
565 | ||
90c9960e GKH |
566 | /* |
567 | * Register with the LDM. This will kick off the driver/device | |
568 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
569 | */ | |
3e7ee490 HJ |
570 | ret = device_register(&child_device_ctx->device); |
571 | ||
454f18a9 | 572 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
573 | ret = child_device_ctx->probe_error; |
574 | ||
575 | if (ret) | |
90c9960e GKH |
576 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
577 | &child_device_ctx->device); | |
3e7ee490 | 578 | else |
90c9960e GKH |
579 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
580 | &child_device_ctx->device); | |
3e7ee490 | 581 | |
3e7ee490 HJ |
582 | return ret; |
583 | } | |
584 | ||
3e189519 HJ |
585 | /* |
586 | * vmbus_child_device_unregister - Remove the specified child device | |
587 | * from the vmbus. | |
90c9960e | 588 | */ |
3d3b5518 | 589 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 590 | { |
f916a34d | 591 | struct vm_device *device_ctx = to_vm_device(device_obj); |
3e7ee490 | 592 | |
90c9960e GKH |
593 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
594 | &device_ctx->device); | |
3e7ee490 | 595 | |
90c9960e GKH |
596 | /* |
597 | * Kick off the process of unregistering the device. | |
598 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
599 | */ | |
3e7ee490 HJ |
600 | device_unregister(&device_ctx->device); |
601 | ||
90c9960e GKH |
602 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
603 | &device_ctx->device); | |
3e7ee490 HJ |
604 | } |
605 | ||
3e189519 | 606 | /* |
90c9960e GKH |
607 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. |
608 | */ | |
3d3b5518 | 609 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
3e7ee490 | 610 | { |
3e7ee490 HJ |
611 | } |
612 | ||
3e189519 | 613 | /* |
90c9960e GKH |
614 | * vmbus_uevent - add uevent for our device |
615 | * | |
616 | * This routine is invoked when a device is added or removed on the vmbus to | |
617 | * generate a uevent to udev in the userspace. The udev will then look at its | |
618 | * rule and the uevent generated here to load the appropriate driver | |
619 | */ | |
3e7ee490 HJ |
620 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
621 | { | |
f916a34d | 622 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
623 | int ret; |
624 | ||
90c9960e GKH |
625 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
626 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
627 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
628 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
629 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
630 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
631 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
632 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
633 | device_ctx->class_id.data[10], | |
634 | device_ctx->class_id.data[11], | |
635 | device_ctx->class_id.data[12], | |
636 | device_ctx->class_id.data[13], | |
637 | device_ctx->class_id.data[14], | |
638 | device_ctx->class_id.data[15]); | |
3e7ee490 | 639 | |
90c9960e GKH |
640 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
641 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
642 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
643 | device_ctx->class_id.data[3], | |
644 | device_ctx->class_id.data[2], | |
645 | device_ctx->class_id.data[1], | |
646 | device_ctx->class_id.data[0], | |
647 | device_ctx->class_id.data[5], | |
648 | device_ctx->class_id.data[4], | |
649 | device_ctx->class_id.data[7], | |
650 | device_ctx->class_id.data[6], | |
651 | device_ctx->class_id.data[8], | |
652 | device_ctx->class_id.data[9], | |
653 | device_ctx->class_id.data[10], | |
654 | device_ctx->class_id.data[11], | |
655 | device_ctx->class_id.data[12], | |
656 | device_ctx->class_id.data[13], | |
657 | device_ctx->class_id.data[14], | |
658 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
659 | |
660 | if (ret) | |
3e7ee490 | 661 | return ret; |
3e7ee490 | 662 | |
90c9960e GKH |
663 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
664 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
665 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
666 | device_ctx->device_id.data[3], | |
667 | device_ctx->device_id.data[2], | |
668 | device_ctx->device_id.data[1], | |
669 | device_ctx->device_id.data[0], | |
670 | device_ctx->device_id.data[5], | |
671 | device_ctx->device_id.data[4], | |
672 | device_ctx->device_id.data[7], | |
673 | device_ctx->device_id.data[6], | |
674 | device_ctx->device_id.data[8], | |
675 | device_ctx->device_id.data[9], | |
676 | device_ctx->device_id.data[10], | |
677 | device_ctx->device_id.data[11], | |
678 | device_ctx->device_id.data[12], | |
679 | device_ctx->device_id.data[13], | |
680 | device_ctx->device_id.data[14], | |
681 | device_ctx->device_id.data[15]); | |
3e7ee490 | 682 | if (ret) |
3e7ee490 | 683 | return ret; |
3e7ee490 | 684 | |
3e7ee490 HJ |
685 | return 0; |
686 | } | |
687 | ||
3e189519 | 688 | /* |
90c9960e GKH |
689 | * vmbus_match - Attempt to match the specified device to the specified driver |
690 | */ | |
3e7ee490 HJ |
691 | static int vmbus_match(struct device *device, struct device_driver *driver) |
692 | { | |
90c9960e | 693 | int match = 0; |
3e7ee490 | 694 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 695 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 696 | |
454f18a9 | 697 | /* We found our driver ? */ |
90c9960e GKH |
698 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
699 | sizeof(struct hv_guid)) == 0) { | |
700 | /* | |
701 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
702 | * it here to access the struct hv_driver field | |
703 | */ | |
704 | struct vmbus_driver_context *vmbus_drv_ctx = | |
705 | (struct vmbus_driver_context *)driver_ctx; | |
706 | ||
3e7ee490 | 707 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
90c9960e GKH |
708 | DPRINT_INFO(VMBUS_DRV, |
709 | "device object (%p) set to driver object (%p)", | |
710 | &device_ctx->device_obj, | |
711 | device_ctx->device_obj.Driver); | |
3e7ee490 HJ |
712 | |
713 | match = 1; | |
714 | } | |
3e7ee490 HJ |
715 | return match; |
716 | } | |
717 | ||
3e189519 | 718 | /* |
90c9960e GKH |
719 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
720 | * | |
721 | * We need a callback because we cannot invoked device_unregister() inside | |
722 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
723 | * i.e. we cannot call device_unregister() inside device_register() | |
724 | */ | |
3e7ee490 | 725 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 726 | { |
f916a34d | 727 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 | 728 | |
90c9960e GKH |
729 | /* |
730 | * Kick off the process of unregistering the device. | |
731 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
732 | */ | |
3e7ee490 HJ |
733 | device_unregister(&device_ctx->device); |
734 | ||
454f18a9 | 735 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
736 | } |
737 | ||
3e189519 | 738 | /* |
90c9960e GKH |
739 | * vmbus_probe - Add the new vmbus's child device |
740 | */ | |
3e7ee490 HJ |
741 | static int vmbus_probe(struct device *child_device) |
742 | { | |
90c9960e GKH |
743 | int ret = 0; |
744 | struct driver_context *driver_ctx = | |
745 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
746 | struct vm_device *device_ctx = |
747 | device_to_vm_device(child_device); | |
3e7ee490 | 748 | |
454f18a9 | 749 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 750 | if (driver_ctx->probe) { |
3e7ee490 | 751 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
752 | if (ret != 0) { |
753 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
754 | "(%p) on driver %s (%d)...", | |
755 | dev_name(child_device), child_device, | |
756 | child_device->driver->name, ret); | |
757 | ||
758 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
759 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
760 | schedule_work(&device_ctx->probe_failed_work_item); |
761 | } | |
90c9960e GKH |
762 | } else { |
763 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
764 | child_device->driver->name); | |
3e7ee490 HJ |
765 | ret = -1; |
766 | } | |
3e7ee490 HJ |
767 | return ret; |
768 | } | |
769 | ||
3e189519 | 770 | /* |
90c9960e GKH |
771 | * vmbus_remove - Remove a vmbus device |
772 | */ | |
3e7ee490 HJ |
773 | static int vmbus_remove(struct device *child_device) |
774 | { | |
90c9960e | 775 | int ret; |
3e7ee490 HJ |
776 | struct driver_context *driver_ctx; |
777 | ||
454f18a9 | 778 | /* Special case root bus device */ |
90c9960e GKH |
779 | if (child_device->parent == NULL) { |
780 | /* | |
781 | * No-op since it is statically defined and handle in | |
782 | * vmbus_bus_exit() | |
783 | */ | |
3e7ee490 HJ |
784 | return 0; |
785 | } | |
786 | ||
90c9960e | 787 | if (child_device->driver) { |
3e7ee490 HJ |
788 | driver_ctx = driver_to_driver_context(child_device->driver); |
789 | ||
90c9960e GKH |
790 | /* |
791 | * Let the specific open-source driver handles the removal if | |
792 | * it can | |
793 | */ | |
794 | if (driver_ctx->remove) { | |
3e7ee490 | 795 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
796 | } else { |
797 | DPRINT_ERR(VMBUS_DRV, | |
798 | "remove() method not set for driver - %s", | |
799 | child_device->driver->name); | |
3e7ee490 HJ |
800 | ret = -1; |
801 | } | |
802 | } | |
3e7ee490 | 803 | |
3e7ee490 HJ |
804 | return 0; |
805 | } | |
806 | ||
3e189519 | 807 | /* |
90c9960e GKH |
808 | * vmbus_shutdown - Shutdown a vmbus device |
809 | */ | |
3e7ee490 HJ |
810 | static void vmbus_shutdown(struct device *child_device) |
811 | { | |
812 | struct driver_context *driver_ctx; | |
813 | ||
454f18a9 | 814 | /* Special case root bus device */ |
90c9960e GKH |
815 | if (child_device->parent == NULL) { |
816 | /* | |
817 | * No-op since it is statically defined and handle in | |
818 | * vmbus_bus_exit() | |
819 | */ | |
3e7ee490 HJ |
820 | return; |
821 | } | |
822 | ||
454f18a9 | 823 | /* The device may not be attached yet */ |
83c720ea | 824 | if (!child_device->driver) |
3e7ee490 | 825 | return; |
3e7ee490 HJ |
826 | |
827 | driver_ctx = driver_to_driver_context(child_device->driver); | |
828 | ||
454f18a9 | 829 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 830 | if (driver_ctx->shutdown) |
3e7ee490 | 831 | driver_ctx->shutdown(child_device); |
3e7ee490 | 832 | |
3e7ee490 HJ |
833 | return; |
834 | } | |
835 | ||
3e189519 | 836 | /* |
90c9960e GKH |
837 | * vmbus_bus_release - Final callback release of the vmbus root device |
838 | */ | |
3e7ee490 HJ |
839 | static void vmbus_bus_release(struct device *device) |
840 | { | |
689bf406 GKH |
841 | /* FIXME */ |
842 | /* Empty release functions are a bug, or a major sign | |
843 | * of a problem design, this MUST BE FIXED! */ | |
844 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
845 | WARN_ON(1); | |
3e7ee490 HJ |
846 | } |
847 | ||
3e189519 | 848 | /* |
90c9960e GKH |
849 | * vmbus_device_release - Final callback release of the vmbus child device |
850 | */ | |
3e7ee490 HJ |
851 | static void vmbus_device_release(struct device *device) |
852 | { | |
f916a34d | 853 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 854 | |
454f18a9 | 855 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
3e7ee490 HJ |
856 | kfree(device_ctx); |
857 | ||
454f18a9 | 858 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
859 | } |
860 | ||
3e189519 | 861 | /* |
90c9960e GKH |
862 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
863 | */ | |
3e7ee490 HJ |
864 | static void vmbus_msg_dpc(unsigned long data) |
865 | { | |
ee3d7ddf | 866 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 867 | |
a3810b0e | 868 | /* ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); */ |
3e7ee490 | 869 | |
454f18a9 | 870 | /* Call to bus driver to handle interrupt */ |
3e7ee490 | 871 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
872 | } |
873 | ||
3e189519 | 874 | /* |
90c9960e GKH |
875 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events |
876 | */ | |
3e7ee490 HJ |
877 | static void vmbus_event_dpc(unsigned long data) |
878 | { | |
ee3d7ddf | 879 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 880 | |
a3810b0e | 881 | /* ASSERT(vmbus_drv_obj->OnEventDpc != NULL); */ |
3e7ee490 | 882 | |
454f18a9 | 883 | /* Call to bus driver to handle interrupt */ |
3e7ee490 | 884 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
885 | } |
886 | ||
90c9960e | 887 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 888 | { |
ee3d7ddf | 889 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 890 | int ret; |
3e7ee490 | 891 | |
a3810b0e | 892 | /* ASSERT(vmbus_driver_obj->OnIsr != NULL); */ |
3e7ee490 | 893 | |
454f18a9 | 894 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
895 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
896 | ||
454f18a9 | 897 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
898 | if (ret > 0) { |
899 | if (test_bit(0, (unsigned long *)&ret)) | |
3e7ee490 | 900 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
3e7ee490 | 901 | |
90c9960e | 902 | if (test_bit(1, (unsigned long *)&ret)) |
3e7ee490 | 903 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
3e7ee490 | 904 | |
3e7ee490 | 905 | return IRQ_HANDLED; |
90c9960e | 906 | } else { |
3e7ee490 HJ |
907 | return IRQ_NONE; |
908 | } | |
909 | } | |
910 | ||
c22090fa GKH |
911 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
912 | { | |
913 | .ident = "Hyper-V", | |
914 | .matches = { | |
915 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
916 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
917 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
918 | }, | |
919 | }, | |
920 | { }, | |
921 | }; | |
922 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
923 | ||
3e7ee490 HJ |
924 | static int __init vmbus_init(void) |
925 | { | |
3e7ee490 HJ |
926 | DPRINT_INFO(VMBUS_DRV, |
927 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
928 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 929 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 930 | |
c22090fa GKH |
931 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
932 | return -ENODEV; | |
933 | ||
83c720ea | 934 | return vmbus_bus_init(VmbusInitialize); |
3e7ee490 HJ |
935 | } |
936 | ||
3e7ee490 HJ |
937 | static void __exit vmbus_exit(void) |
938 | { | |
3e7ee490 | 939 | vmbus_bus_exit(); |
90c9960e | 940 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
941 | } |
942 | ||
9a775dbd GKH |
943 | /* |
944 | * We use a PCI table to determine if we should autoload this driver This is | |
945 | * needed by distro tools to determine if the hyperv drivers should be | |
946 | * installed and/or configured. We don't do anything else with the table, but | |
947 | * it needs to be present. | |
9a775dbd | 948 | */ |
15f0beb1 | 949 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
950 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
951 | { 0 } | |
952 | }; | |
953 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
954 | ||
90c9960e | 955 | MODULE_LICENSE("GPL"); |
26c14cc1 | 956 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
957 | module_param(vmbus_irq, int, S_IRUGO); |
958 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
959 | |
960 | module_init(vmbus_init); | |
961 | module_exit(vmbus_exit); |