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 int vmbus_child_device_register(struct hv_device *root_device_obj, |
73 | struct hv_device *child_device_obj); | |
90c9960e GKH |
74 | static ssize_t vmbus_show_device_attr(struct device *dev, |
75 | struct device_attribute *dev_attr, | |
76 | char *buf); | |
3e7ee490 | 77 | |
3e7ee490 | 78 | |
90c9960e | 79 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 80 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
81 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
82 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
83 | |
84 | static int vmbus_irq = VMBUS_IRQ; | |
85 | ||
454f18a9 | 86 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
87 | static struct device_attribute vmbus_device_attrs[] = { |
88 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
89 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
90 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
91 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
92 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
93 | ||
94 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | ||
98 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
99 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
100 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
101 | ||
102 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
106 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
107 | ||
108 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
109 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
110 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
111 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
112 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
113 | __ATTR_NULL | |
114 | }; | |
3e7ee490 | 115 | |
454f18a9 | 116 | /* The one and only one */ |
90c9960e GKH |
117 | static struct vmbus_driver_context g_vmbus_drv = { |
118 | .bus.name = "vmbus", | |
119 | .bus.match = vmbus_match, | |
120 | .bus.shutdown = vmbus_shutdown, | |
121 | .bus.remove = vmbus_remove, | |
122 | .bus.probe = vmbus_probe, | |
123 | .bus.uevent = vmbus_uevent, | |
124 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
125 | }; |
126 | ||
150b19d4 GKH |
127 | static void get_channel_info(struct hv_device *device, |
128 | struct hv_device_info *info) | |
129 | { | |
130 | struct vmbus_channel_debug_info debug_info; | |
131 | ||
cae5b843 | 132 | if (!device->channel) |
150b19d4 GKH |
133 | return; |
134 | ||
cae5b843 | 135 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 136 | |
c50f7fb2 HZ |
137 | info->ChannelId = debug_info.relid; |
138 | info->ChannelState = debug_info.state; | |
139 | memcpy(&info->ChannelType, &debug_info.interfacetype, | |
150b19d4 | 140 | sizeof(struct hv_guid)); |
c50f7fb2 | 141 | memcpy(&info->ChannelInstance, &debug_info.interface_instance, |
150b19d4 GKH |
142 | sizeof(struct hv_guid)); |
143 | ||
c50f7fb2 | 144 | info->MonitorId = debug_info.monitorid; |
150b19d4 | 145 | |
c50f7fb2 HZ |
146 | info->ServerMonitorPending = debug_info.servermonitor_pending; |
147 | info->ServerMonitorLatency = debug_info.servermonitor_latency; | |
148 | info->ServerMonitorConnectionId = debug_info.servermonitor_connectionid; | |
150b19d4 | 149 | |
c50f7fb2 HZ |
150 | info->ClientMonitorPending = debug_info.clientmonitor_pending; |
151 | info->ClientMonitorLatency = debug_info.clientmonitor_latency; | |
152 | info->ClientMonitorConnectionId = debug_info.clientmonitor_connectionid; | |
150b19d4 | 153 | |
82f8bd40 HZ |
154 | info->Inbound.InterruptMask = debug_info.inbound.current_interrupt_mask; |
155 | info->Inbound.ReadIndex = debug_info.inbound.current_read_index; | |
156 | info->Inbound.WriteIndex = debug_info.inbound.current_write_index; | |
157 | info->Inbound.BytesAvailToRead = debug_info.inbound.bytes_avail_toread; | |
158 | info->Inbound.BytesAvailToWrite = | |
159 | debug_info.inbound.bytes_avail_towrite; | |
160 | ||
161 | info->Outbound.InterruptMask = | |
162 | debug_info.outbound.current_interrupt_mask; | |
163 | info->Outbound.ReadIndex = debug_info.outbound.current_read_index; | |
164 | info->Outbound.WriteIndex = debug_info.outbound.current_write_index; | |
165 | info->Outbound.BytesAvailToRead = | |
166 | debug_info.outbound.bytes_avail_toread; | |
150b19d4 | 167 | info->Outbound.BytesAvailToWrite = |
82f8bd40 | 168 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
169 | } |
170 | ||
3e189519 | 171 | /* |
90c9960e GKH |
172 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
173 | * | |
174 | * This is invoked when user does a | |
175 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
176 | */ | |
177 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
178 | struct device_attribute *dev_attr, | |
179 | char *buf) | |
3e7ee490 | 180 | { |
f916a34d | 181 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 182 | struct hv_device_info device_info; |
3e7ee490 | 183 | |
ee3d7ddf | 184 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 185 | |
a4e91ed2 | 186 | get_channel_info(&device_ctx->device_obj, &device_info); |
3e7ee490 | 187 | |
90c9960e GKH |
188 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
189 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
190 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
191 | device_info.ChannelType.data[3], | |
192 | device_info.ChannelType.data[2], | |
193 | device_info.ChannelType.data[1], | |
194 | device_info.ChannelType.data[0], | |
195 | device_info.ChannelType.data[5], | |
196 | device_info.ChannelType.data[4], | |
197 | device_info.ChannelType.data[7], | |
198 | device_info.ChannelType.data[6], | |
199 | device_info.ChannelType.data[8], | |
200 | device_info.ChannelType.data[9], | |
201 | device_info.ChannelType.data[10], | |
202 | device_info.ChannelType.data[11], | |
203 | device_info.ChannelType.data[12], | |
204 | device_info.ChannelType.data[13], | |
205 | device_info.ChannelType.data[14], | |
206 | device_info.ChannelType.data[15]); | |
207 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { | |
208 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
209 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
210 | device_info.ChannelInstance.data[3], | |
211 | device_info.ChannelInstance.data[2], | |
212 | device_info.ChannelInstance.data[1], | |
213 | device_info.ChannelInstance.data[0], | |
214 | device_info.ChannelInstance.data[5], | |
215 | device_info.ChannelInstance.data[4], | |
216 | device_info.ChannelInstance.data[7], | |
217 | device_info.ChannelInstance.data[6], | |
218 | device_info.ChannelInstance.data[8], | |
219 | device_info.ChannelInstance.data[9], | |
220 | device_info.ChannelInstance.data[10], | |
221 | device_info.ChannelInstance.data[11], | |
222 | device_info.ChannelInstance.data[12], | |
223 | device_info.ChannelInstance.data[13], | |
224 | device_info.ChannelInstance.data[14], | |
225 | device_info.ChannelInstance.data[15]); | |
226 | } else if (!strcmp(dev_attr->attr.name, "state")) { | |
3e7ee490 | 227 | return sprintf(buf, "%d\n", device_info.ChannelState); |
90c9960e | 228 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
3e7ee490 | 229 | return sprintf(buf, "%d\n", device_info.ChannelId); |
90c9960e | 230 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
3e7ee490 | 231 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
90c9960e | 232 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
3e7ee490 | 233 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
90c9960e | 234 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
3e7ee490 | 235 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
90c9960e GKH |
236 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
237 | return sprintf(buf, "%d\n", | |
238 | device_info.Outbound.BytesAvailToRead); | |
239 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { | |
240 | return sprintf(buf, "%d\n", | |
241 | device_info.Outbound.BytesAvailToWrite); | |
242 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { | |
3e7ee490 | 243 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
90c9960e | 244 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
3e7ee490 | 245 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
90c9960e | 246 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
3e7ee490 | 247 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
90c9960e GKH |
248 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
249 | return sprintf(buf, "%d\n", | |
250 | device_info.Inbound.BytesAvailToRead); | |
251 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { | |
252 | return sprintf(buf, "%d\n", | |
253 | device_info.Inbound.BytesAvailToWrite); | |
254 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { | |
3e7ee490 | 255 | return sprintf(buf, "%d\n", device_info.MonitorId); |
90c9960e | 256 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
3e7ee490 | 257 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
90c9960e | 258 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
3e7ee490 | 259 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
90c9960e GKH |
260 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
261 | return sprintf(buf, "%d\n", | |
262 | device_info.ServerMonitorConnectionId); | |
263 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { | |
3e7ee490 | 264 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
90c9960e | 265 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
3e7ee490 | 266 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
90c9960e GKH |
267 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
268 | return sprintf(buf, "%d\n", | |
269 | device_info.ClientMonitorConnectionId); | |
270 | } else { | |
3e7ee490 HJ |
271 | return 0; |
272 | } | |
273 | } | |
274 | ||
3e189519 | 275 | /* |
90c9960e GKH |
276 | * vmbus_bus_init -Main vmbus driver initialization routine. |
277 | * | |
278 | * Here, we | |
0686e4f4 LL |
279 | * - initialize the vmbus driver context |
280 | * - setup various driver entry points | |
281 | * - invoke the vmbus hv main init routine | |
282 | * - get the irq resource | |
283 | * - invoke the vmbus to add the vmbus root device | |
284 | * - setup the vmbus root device | |
285 | * - retrieve the channel offers | |
90c9960e | 286 | */ |
21707bed | 287 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
3e7ee490 | 288 | { |
90c9960e | 289 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
ee3d7ddf | 290 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
f916a34d | 291 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
90c9960e GKH |
292 | int ret; |
293 | unsigned int vector; | |
3e7ee490 | 294 | |
90c9960e GKH |
295 | /* |
296 | * Set this up to allow lower layer to callback to add/remove child | |
297 | * devices on the bus | |
298 | */ | |
3e7ee490 | 299 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; |
3e7ee490 | 300 | |
454f18a9 | 301 | /* Call to bus driver to initialize */ |
21707bed | 302 | ret = drv_init(&vmbus_drv_obj->Base); |
90c9960e | 303 | if (ret != 0) { |
3e7ee490 HJ |
304 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); |
305 | goto cleanup; | |
306 | } | |
307 | ||
454f18a9 | 308 | /* Sanity checks */ |
90c9960e | 309 | if (!vmbus_drv_obj->Base.OnDeviceAdd) { |
3e7ee490 HJ |
310 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
311 | ret = -1; | |
312 | goto cleanup; | |
313 | } | |
314 | ||
315 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; | |
316 | ||
454f18a9 | 317 | /* Initialize the bus context */ |
90c9960e GKH |
318 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
319 | (unsigned long)vmbus_drv_obj); | |
320 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, | |
321 | (unsigned long)vmbus_drv_obj); | |
3e7ee490 | 322 | |
454f18a9 | 323 | /* Now, register the bus driver with LDM */ |
c19fbca3 | 324 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 325 | if (ret) { |
c19fbca3 BP |
326 | ret = -1; |
327 | goto cleanup; | |
328 | } | |
3e7ee490 | 329 | |
454f18a9 | 330 | /* Get the interrupt resource */ |
90c9960e GKH |
331 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
332 | vmbus_drv_obj->Base.name, NULL); | |
3e7ee490 | 333 | |
90c9960e GKH |
334 | if (ret != 0) { |
335 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
336 | vmbus_irq); | |
3e7ee490 HJ |
337 | |
338 | bus_unregister(&vmbus_drv_ctx->bus); | |
339 | ||
340 | ret = -1; | |
341 | goto cleanup; | |
342 | } | |
3e7ee490 | 343 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
344 | |
345 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
346 | ||
454f18a9 | 347 | /* Call to bus driver to add the root device */ |
f916a34d | 348 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
3e7ee490 HJ |
349 | |
350 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); | |
90c9960e GKH |
351 | if (ret != 0) { |
352 | DPRINT_ERR(VMBUS_DRV, | |
353 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
354 | |
355 | free_irq(vmbus_irq, NULL); | |
356 | ||
357 | bus_unregister(&vmbus_drv_ctx->bus); | |
358 | ||
359 | ret = -1; | |
360 | goto cleanup; | |
361 | } | |
454f18a9 | 362 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 363 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
90c9960e GKH |
364 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, |
365 | sizeof(struct hv_guid)); | |
366 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, | |
367 | sizeof(struct hv_guid)); | |
3e7ee490 | 368 | |
454f18a9 | 369 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 370 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
371 | /* NULL; vmbus_remove() does not get invoked */ |
372 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 373 | |
454f18a9 | 374 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
375 | dev_ctx->device.release = vmbus_bus_release; |
376 | ||
454f18a9 | 377 | /* Setup the bus as root device */ |
5d48a1c2 | 378 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
379 | if (ret) { |
380 | DPRINT_ERR(VMBUS_DRV, | |
381 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
382 | |
383 | free_irq(vmbus_irq, NULL); | |
384 | bus_unregister(&vmbus_drv_ctx->bus); | |
385 | ||
386 | ret = -1; | |
387 | goto cleanup; | |
388 | } | |
389 | ||
3e7ee490 HJ |
390 | |
391 | vmbus_drv_obj->GetChannelOffers(); | |
392 | ||
8b5d6d3b HZ |
393 | wait_for_completion(&hv_channel_ready); |
394 | ||
3e7ee490 | 395 | cleanup: |
3e7ee490 HJ |
396 | return ret; |
397 | } | |
398 | ||
3e189519 | 399 | /* |
90c9960e GKH |
400 | * vmbus_bus_exit - Terminate the vmbus driver. |
401 | * | |
402 | * This routine is opposite of vmbus_bus_init() | |
403 | */ | |
bd1de709 | 404 | static void vmbus_bus_exit(void) |
3e7ee490 | 405 | { |
ee3d7ddf | 406 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 407 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
3e7ee490 | 408 | |
f916a34d | 409 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
3e7ee490 | 410 | |
454f18a9 | 411 | /* Remove the root device */ |
3e7ee490 HJ |
412 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
413 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
414 | ||
415 | if (vmbus_drv_obj->Base.OnCleanup) | |
416 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
417 | ||
454f18a9 | 418 | /* Unregister the root bus device */ |
3e7ee490 HJ |
419 | device_unregister(&dev_ctx->device); |
420 | ||
421 | bus_unregister(&vmbus_drv_ctx->bus); | |
422 | ||
423 | free_irq(vmbus_irq, NULL); | |
424 | ||
425 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
426 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
427 | } |
428 | ||
3e189519 | 429 | |
90c9960e | 430 | /** |
3e189519 HJ |
431 | * vmbus_child_driver_register() - Register a vmbus's child driver |
432 | * @driver_ctx: Pointer to driver structure you want to register | |
433 | * | |
434 | * @driver_ctx is of type &struct driver_context | |
435 | * | |
436 | * Registers the given driver with Linux through the 'driver_register()' call | |
437 | * And sets up the hyper-v vmbus handling for this driver. | |
438 | * It will return the state of the 'driver_register()' call. | |
439 | * | |
440 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
441 | */ |
442 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 443 | { |
ee3d7ddf | 444 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 445 | int ret; |
3e7ee490 | 446 | |
90c9960e GKH |
447 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
448 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 449 | |
454f18a9 | 450 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
451 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
452 | ||
5d48a1c2 | 453 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
454 | |
455 | vmbus_drv_obj->GetChannelOffers(); | |
456 | ||
5d48a1c2 | 457 | return ret; |
3e7ee490 | 458 | } |
3e7ee490 HJ |
459 | EXPORT_SYMBOL(vmbus_child_driver_register); |
460 | ||
90c9960e | 461 | /** |
3e189519 HJ |
462 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
463 | * @driver_ctx: Pointer to driver structure you want to un-register | |
464 | * | |
465 | * @driver_ctx is of type &struct driver_context | |
466 | * | |
467 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
468 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
469 | * | |
470 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
471 | */ |
472 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 | 473 | { |
90c9960e GKH |
474 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
475 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
476 | |
477 | driver_unregister(&driver_ctx->driver); | |
478 | ||
479 | driver_ctx->driver.bus = NULL; | |
3e7ee490 | 480 | } |
3e7ee490 HJ |
481 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
482 | ||
3e189519 HJ |
483 | /* |
484 | * vmbus_child_device_create - Creates and registers a new child device | |
485 | * on the vmbus. | |
90c9960e | 486 | */ |
89733aa9 GKH |
487 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
488 | struct hv_guid *instance, | |
489 | struct vmbus_channel *channel) | |
3e7ee490 | 490 | { |
f916a34d | 491 | struct vm_device *child_device_ctx; |
3d3b5518 | 492 | struct hv_device *child_device_obj; |
3e7ee490 | 493 | |
454f18a9 | 494 | /* Allocate the new child device */ |
f916a34d | 495 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
496 | if (!child_device_ctx) { |
497 | DPRINT_ERR(VMBUS_DRV, | |
498 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
499 | return NULL; |
500 | } | |
501 | ||
502 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
503 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
504 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
505 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
506 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 507 | &child_device_ctx->device, |
daaa8cc3 GKH |
508 | type->data[3], type->data[2], type->data[1], type->data[0], |
509 | type->data[5], type->data[4], type->data[7], type->data[6], | |
510 | type->data[8], type->data[9], type->data[10], type->data[11], | |
511 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
512 | instance->data[3], instance->data[2], |
513 | instance->data[1], instance->data[0], | |
514 | instance->data[5], instance->data[4], | |
515 | instance->data[7], instance->data[6], | |
516 | instance->data[8], instance->data[9], | |
517 | instance->data[10], instance->data[11], | |
518 | instance->data[12], instance->data[13], | |
519 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
520 | |
521 | child_device_obj = &child_device_ctx->device_obj; | |
cae5b843 | 522 | child_device_obj->channel = channel; |
9fb5cce4 MD |
523 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
524 | memcpy(&child_device_obj->deviceInstance, instance, | |
90c9960e | 525 | sizeof(struct hv_guid)); |
3e7ee490 | 526 | |
9fb5cce4 MD |
527 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
528 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 | 529 | |
3e7ee490 HJ |
530 | return child_device_obj; |
531 | } | |
532 | ||
3e189519 | 533 | /* |
90c9960e GKH |
534 | * vmbus_child_device_register - Register the child device on the specified bus |
535 | */ | |
536 | static int vmbus_child_device_register(struct hv_device *root_device_obj, | |
537 | struct hv_device *child_device_obj) | |
3e7ee490 | 538 | { |
90c9960e | 539 | int ret = 0; |
f916a34d HZ |
540 | struct vm_device *root_device_ctx = |
541 | to_vm_device(root_device_obj); | |
542 | struct vm_device *child_device_ctx = | |
543 | to_vm_device(child_device_obj); | |
f4888417 | 544 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 545 | |
90c9960e GKH |
546 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
547 | child_device_ctx); | |
454f18a9 | 548 | |
1bb40a25 | 549 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
550 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
551 | atomic_inc_return(&device_num)); | |
3e7ee490 | 552 | |
454f18a9 BP |
553 | /* The new device belongs to this bus */ |
554 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
555 | child_device_ctx->device.parent = &root_device_ctx->device; |
556 | child_device_ctx->device.release = vmbus_device_release; | |
557 | ||
90c9960e GKH |
558 | /* |
559 | * Register with the LDM. This will kick off the driver/device | |
560 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
561 | */ | |
3e7ee490 HJ |
562 | ret = device_register(&child_device_ctx->device); |
563 | ||
454f18a9 | 564 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
565 | ret = child_device_ctx->probe_error; |
566 | ||
567 | if (ret) | |
90c9960e GKH |
568 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
569 | &child_device_ctx->device); | |
3e7ee490 | 570 | else |
90c9960e GKH |
571 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
572 | &child_device_ctx->device); | |
3e7ee490 | 573 | |
3e7ee490 HJ |
574 | return ret; |
575 | } | |
576 | ||
3e189519 HJ |
577 | /* |
578 | * vmbus_child_device_unregister - Remove the specified child device | |
579 | * from the vmbus. | |
90c9960e | 580 | */ |
9d8bd71a | 581 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 582 | { |
f916a34d | 583 | struct vm_device *device_ctx = to_vm_device(device_obj); |
3e7ee490 | 584 | |
90c9960e GKH |
585 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
586 | &device_ctx->device); | |
3e7ee490 | 587 | |
90c9960e GKH |
588 | /* |
589 | * Kick off the process of unregistering the device. | |
590 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
591 | */ | |
3e7ee490 HJ |
592 | device_unregister(&device_ctx->device); |
593 | ||
90c9960e GKH |
594 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
595 | &device_ctx->device); | |
3e7ee490 HJ |
596 | } |
597 | ||
3e189519 | 598 | /* |
90c9960e GKH |
599 | * vmbus_uevent - add uevent for our device |
600 | * | |
601 | * This routine is invoked when a device is added or removed on the vmbus to | |
602 | * generate a uevent to udev in the userspace. The udev will then look at its | |
603 | * rule and the uevent generated here to load the appropriate driver | |
604 | */ | |
3e7ee490 HJ |
605 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
606 | { | |
f916a34d | 607 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
608 | int ret; |
609 | ||
90c9960e GKH |
610 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
611 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
612 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
613 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
614 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
615 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
616 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
617 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
618 | device_ctx->class_id.data[10], | |
619 | device_ctx->class_id.data[11], | |
620 | device_ctx->class_id.data[12], | |
621 | device_ctx->class_id.data[13], | |
622 | device_ctx->class_id.data[14], | |
623 | device_ctx->class_id.data[15]); | |
3e7ee490 | 624 | |
90c9960e GKH |
625 | ret = add_uevent_var(env, "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], | |
629 | device_ctx->class_id.data[2], | |
630 | device_ctx->class_id.data[1], | |
631 | device_ctx->class_id.data[0], | |
632 | device_ctx->class_id.data[5], | |
633 | device_ctx->class_id.data[4], | |
634 | device_ctx->class_id.data[7], | |
635 | device_ctx->class_id.data[6], | |
636 | device_ctx->class_id.data[8], | |
637 | device_ctx->class_id.data[9], | |
638 | device_ctx->class_id.data[10], | |
639 | device_ctx->class_id.data[11], | |
640 | device_ctx->class_id.data[12], | |
641 | device_ctx->class_id.data[13], | |
642 | device_ctx->class_id.data[14], | |
643 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
644 | |
645 | if (ret) | |
3e7ee490 | 646 | return ret; |
3e7ee490 | 647 | |
90c9960e GKH |
648 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
649 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
650 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
651 | device_ctx->device_id.data[3], | |
652 | device_ctx->device_id.data[2], | |
653 | device_ctx->device_id.data[1], | |
654 | device_ctx->device_id.data[0], | |
655 | device_ctx->device_id.data[5], | |
656 | device_ctx->device_id.data[4], | |
657 | device_ctx->device_id.data[7], | |
658 | device_ctx->device_id.data[6], | |
659 | device_ctx->device_id.data[8], | |
660 | device_ctx->device_id.data[9], | |
661 | device_ctx->device_id.data[10], | |
662 | device_ctx->device_id.data[11], | |
663 | device_ctx->device_id.data[12], | |
664 | device_ctx->device_id.data[13], | |
665 | device_ctx->device_id.data[14], | |
666 | device_ctx->device_id.data[15]); | |
3e7ee490 | 667 | if (ret) |
3e7ee490 | 668 | return ret; |
3e7ee490 | 669 | |
3e7ee490 HJ |
670 | return 0; |
671 | } | |
672 | ||
3e189519 | 673 | /* |
90c9960e GKH |
674 | * vmbus_match - Attempt to match the specified device to the specified driver |
675 | */ | |
3e7ee490 HJ |
676 | static int vmbus_match(struct device *device, struct device_driver *driver) |
677 | { | |
90c9960e | 678 | int match = 0; |
3e7ee490 | 679 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 680 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 681 | |
454f18a9 | 682 | /* We found our driver ? */ |
90c9960e GKH |
683 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
684 | sizeof(struct hv_guid)) == 0) { | |
685 | /* | |
686 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
687 | * it here to access the struct hv_driver field | |
688 | */ | |
689 | struct vmbus_driver_context *vmbus_drv_ctx = | |
690 | (struct vmbus_driver_context *)driver_ctx; | |
691 | ||
3e7ee490 | 692 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
90c9960e GKH |
693 | DPRINT_INFO(VMBUS_DRV, |
694 | "device object (%p) set to driver object (%p)", | |
695 | &device_ctx->device_obj, | |
696 | device_ctx->device_obj.Driver); | |
3e7ee490 HJ |
697 | |
698 | match = 1; | |
699 | } | |
3e7ee490 HJ |
700 | return match; |
701 | } | |
702 | ||
3e189519 | 703 | /* |
90c9960e GKH |
704 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
705 | * | |
706 | * We need a callback because we cannot invoked device_unregister() inside | |
707 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
708 | * i.e. we cannot call device_unregister() inside device_register() | |
709 | */ | |
3e7ee490 | 710 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 711 | { |
f916a34d | 712 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 | 713 | |
90c9960e GKH |
714 | /* |
715 | * Kick off the process of unregistering the device. | |
716 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
717 | */ | |
3e7ee490 HJ |
718 | device_unregister(&device_ctx->device); |
719 | ||
454f18a9 | 720 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
721 | } |
722 | ||
3e189519 | 723 | /* |
90c9960e GKH |
724 | * vmbus_probe - Add the new vmbus's child device |
725 | */ | |
3e7ee490 HJ |
726 | static int vmbus_probe(struct device *child_device) |
727 | { | |
90c9960e GKH |
728 | int ret = 0; |
729 | struct driver_context *driver_ctx = | |
730 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
731 | struct vm_device *device_ctx = |
732 | device_to_vm_device(child_device); | |
3e7ee490 | 733 | |
454f18a9 | 734 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 735 | if (driver_ctx->probe) { |
3e7ee490 | 736 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
737 | if (ret != 0) { |
738 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
739 | "(%p) on driver %s (%d)...", | |
740 | dev_name(child_device), child_device, | |
741 | child_device->driver->name, ret); | |
742 | ||
743 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
744 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
745 | schedule_work(&device_ctx->probe_failed_work_item); |
746 | } | |
90c9960e GKH |
747 | } else { |
748 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
749 | child_device->driver->name); | |
3e7ee490 HJ |
750 | ret = -1; |
751 | } | |
3e7ee490 HJ |
752 | return ret; |
753 | } | |
754 | ||
3e189519 | 755 | /* |
90c9960e GKH |
756 | * vmbus_remove - Remove a vmbus device |
757 | */ | |
3e7ee490 HJ |
758 | static int vmbus_remove(struct device *child_device) |
759 | { | |
90c9960e | 760 | int ret; |
3e7ee490 HJ |
761 | struct driver_context *driver_ctx; |
762 | ||
454f18a9 | 763 | /* Special case root bus device */ |
90c9960e GKH |
764 | if (child_device->parent == NULL) { |
765 | /* | |
766 | * No-op since it is statically defined and handle in | |
767 | * vmbus_bus_exit() | |
768 | */ | |
3e7ee490 HJ |
769 | return 0; |
770 | } | |
771 | ||
90c9960e | 772 | if (child_device->driver) { |
3e7ee490 HJ |
773 | driver_ctx = driver_to_driver_context(child_device->driver); |
774 | ||
90c9960e GKH |
775 | /* |
776 | * Let the specific open-source driver handles the removal if | |
777 | * it can | |
778 | */ | |
779 | if (driver_ctx->remove) { | |
3e7ee490 | 780 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
781 | } else { |
782 | DPRINT_ERR(VMBUS_DRV, | |
783 | "remove() method not set for driver - %s", | |
784 | child_device->driver->name); | |
3e7ee490 HJ |
785 | ret = -1; |
786 | } | |
787 | } | |
3e7ee490 | 788 | |
3e7ee490 HJ |
789 | return 0; |
790 | } | |
791 | ||
3e189519 | 792 | /* |
90c9960e GKH |
793 | * vmbus_shutdown - Shutdown a vmbus device |
794 | */ | |
3e7ee490 HJ |
795 | static void vmbus_shutdown(struct device *child_device) |
796 | { | |
797 | struct driver_context *driver_ctx; | |
798 | ||
454f18a9 | 799 | /* Special case root bus device */ |
90c9960e GKH |
800 | if (child_device->parent == NULL) { |
801 | /* | |
802 | * No-op since it is statically defined and handle in | |
803 | * vmbus_bus_exit() | |
804 | */ | |
3e7ee490 HJ |
805 | return; |
806 | } | |
807 | ||
454f18a9 | 808 | /* The device may not be attached yet */ |
83c720ea | 809 | if (!child_device->driver) |
3e7ee490 | 810 | return; |
3e7ee490 HJ |
811 | |
812 | driver_ctx = driver_to_driver_context(child_device->driver); | |
813 | ||
454f18a9 | 814 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 815 | if (driver_ctx->shutdown) |
3e7ee490 | 816 | driver_ctx->shutdown(child_device); |
3e7ee490 | 817 | |
3e7ee490 HJ |
818 | return; |
819 | } | |
820 | ||
3e189519 | 821 | /* |
90c9960e GKH |
822 | * vmbus_bus_release - Final callback release of the vmbus root device |
823 | */ | |
3e7ee490 HJ |
824 | static void vmbus_bus_release(struct device *device) |
825 | { | |
689bf406 GKH |
826 | /* FIXME */ |
827 | /* Empty release functions are a bug, or a major sign | |
828 | * of a problem design, this MUST BE FIXED! */ | |
829 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
830 | WARN_ON(1); | |
3e7ee490 HJ |
831 | } |
832 | ||
3e189519 | 833 | /* |
90c9960e GKH |
834 | * vmbus_device_release - Final callback release of the vmbus child device |
835 | */ | |
3e7ee490 HJ |
836 | static void vmbus_device_release(struct device *device) |
837 | { | |
f916a34d | 838 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 839 | |
3e7ee490 HJ |
840 | kfree(device_ctx); |
841 | ||
454f18a9 | 842 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
843 | } |
844 | ||
3e189519 | 845 | /* |
90c9960e GKH |
846 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
847 | */ | |
3e7ee490 HJ |
848 | static void vmbus_msg_dpc(unsigned long data) |
849 | { | |
ee3d7ddf | 850 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 851 | |
454f18a9 | 852 | /* Call to bus driver to handle interrupt */ |
4a1494fc | 853 | vmbus_on_msg_dpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
854 | } |
855 | ||
3e189519 | 856 | /* |
4a1494fc | 857 | * vmbus_event_dpc - Tasklet routine to handle hypervisor events |
90c9960e | 858 | */ |
3e7ee490 HJ |
859 | static void vmbus_event_dpc(unsigned long data) |
860 | { | |
ee3d7ddf | 861 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 862 | |
454f18a9 | 863 | /* Call to bus driver to handle interrupt */ |
c722bd3e | 864 | vmbus_on_event_dpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
865 | } |
866 | ||
90c9960e | 867 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 868 | { |
ee3d7ddf | 869 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 870 | int ret; |
3e7ee490 | 871 | |
454f18a9 | 872 | /* Call to bus driver to handle interrupt */ |
097e3103 | 873 | ret = vmbus_on_isr(&vmbus_driver_obj->Base); |
3e7ee490 | 874 | |
454f18a9 | 875 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
876 | if (ret > 0) { |
877 | if (test_bit(0, (unsigned long *)&ret)) | |
3e7ee490 | 878 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
3e7ee490 | 879 | |
90c9960e | 880 | if (test_bit(1, (unsigned long *)&ret)) |
3e7ee490 | 881 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
3e7ee490 | 882 | |
3e7ee490 | 883 | return IRQ_HANDLED; |
90c9960e | 884 | } else { |
3e7ee490 HJ |
885 | return IRQ_NONE; |
886 | } | |
887 | } | |
888 | ||
c22090fa GKH |
889 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
890 | { | |
891 | .ident = "Hyper-V", | |
892 | .matches = { | |
893 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
894 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
895 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
896 | }, | |
897 | }, | |
898 | { }, | |
899 | }; | |
900 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
901 | ||
3e7ee490 HJ |
902 | static int __init vmbus_init(void) |
903 | { | |
3e7ee490 HJ |
904 | DPRINT_INFO(VMBUS_DRV, |
905 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
906 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 907 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 908 | |
c22090fa GKH |
909 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
910 | return -ENODEV; | |
911 | ||
83c720ea | 912 | return vmbus_bus_init(VmbusInitialize); |
3e7ee490 HJ |
913 | } |
914 | ||
3e7ee490 HJ |
915 | static void __exit vmbus_exit(void) |
916 | { | |
3e7ee490 | 917 | vmbus_bus_exit(); |
90c9960e | 918 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
919 | } |
920 | ||
9a775dbd GKH |
921 | /* |
922 | * We use a PCI table to determine if we should autoload this driver This is | |
923 | * needed by distro tools to determine if the hyperv drivers should be | |
924 | * installed and/or configured. We don't do anything else with the table, but | |
925 | * it needs to be present. | |
9a775dbd | 926 | */ |
15f0beb1 | 927 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
928 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
929 | { 0 } | |
930 | }; | |
931 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
932 | ||
90c9960e | 933 | MODULE_LICENSE("GPL"); |
26c14cc1 | 934 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
935 | module_param(vmbus_irq, int, S_IRUGO); |
936 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
937 | |
938 | module_init(vmbus_init); | |
939 | module_exit(vmbus_exit); |