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Commit | Line | Data |
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3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
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, | |
74 | void *context); | |
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 | ||
137 | if (!device->context) | |
138 | return; | |
139 | ||
140 | vmbus_get_debug_info(device->context, &debug_info); | |
141 | ||
142 | info->ChannelId = debug_info.RelId; | |
143 | info->ChannelState = debug_info.State; | |
144 | memcpy(&info->ChannelType, &debug_info.InterfaceType, | |
145 | sizeof(struct hv_guid)); | |
146 | memcpy(&info->ChannelInstance, &debug_info.InterfaceInstance, | |
147 | sizeof(struct hv_guid)); | |
148 | ||
149 | info->MonitorId = debug_info.MonitorId; | |
150 | ||
151 | info->ServerMonitorPending = debug_info.ServerMonitorPending; | |
152 | info->ServerMonitorLatency = debug_info.ServerMonitorLatency; | |
153 | info->ServerMonitorConnectionId = debug_info.ServerMonitorConnectionId; | |
154 | ||
155 | info->ClientMonitorPending = debug_info.ClientMonitorPending; | |
156 | info->ClientMonitorLatency = debug_info.ClientMonitorLatency; | |
157 | info->ClientMonitorConnectionId = debug_info.ClientMonitorConnectionId; | |
158 | ||
159 | info->Inbound.InterruptMask = debug_info.Inbound.CurrentInterruptMask; | |
160 | info->Inbound.ReadIndex = debug_info.Inbound.CurrentReadIndex; | |
161 | info->Inbound.WriteIndex = debug_info.Inbound.CurrentWriteIndex; | |
162 | info->Inbound.BytesAvailToRead = debug_info.Inbound.BytesAvailToRead; | |
163 | info->Inbound.BytesAvailToWrite = debug_info.Inbound.BytesAvailToWrite; | |
164 | ||
165 | info->Outbound.InterruptMask = debug_info.Outbound.CurrentInterruptMask; | |
166 | info->Outbound.ReadIndex = debug_info.Outbound.CurrentReadIndex; | |
167 | info->Outbound.WriteIndex = debug_info.Outbound.CurrentWriteIndex; | |
168 | info->Outbound.BytesAvailToRead = debug_info.Outbound.BytesAvailToRead; | |
169 | info->Outbound.BytesAvailToWrite = | |
170 | debug_info.Outbound.BytesAvailToWrite; | |
171 | } | |
172 | ||
3e189519 | 173 | /* |
90c9960e GKH |
174 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
175 | * | |
176 | * This is invoked when user does a | |
177 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
178 | */ | |
179 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
180 | struct device_attribute *dev_attr, | |
181 | char *buf) | |
3e7ee490 | 182 | { |
f916a34d | 183 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 184 | struct hv_device_info device_info; |
3e7ee490 | 185 | |
ee3d7ddf | 186 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 187 | |
a4e91ed2 | 188 | get_channel_info(&device_ctx->device_obj, &device_info); |
3e7ee490 | 189 | |
90c9960e GKH |
190 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
191 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
192 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
193 | device_info.ChannelType.data[3], | |
194 | device_info.ChannelType.data[2], | |
195 | device_info.ChannelType.data[1], | |
196 | device_info.ChannelType.data[0], | |
197 | device_info.ChannelType.data[5], | |
198 | device_info.ChannelType.data[4], | |
199 | device_info.ChannelType.data[7], | |
200 | device_info.ChannelType.data[6], | |
201 | device_info.ChannelType.data[8], | |
202 | device_info.ChannelType.data[9], | |
203 | device_info.ChannelType.data[10], | |
204 | device_info.ChannelType.data[11], | |
205 | device_info.ChannelType.data[12], | |
206 | device_info.ChannelType.data[13], | |
207 | device_info.ChannelType.data[14], | |
208 | device_info.ChannelType.data[15]); | |
209 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { | |
210 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
211 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
212 | device_info.ChannelInstance.data[3], | |
213 | device_info.ChannelInstance.data[2], | |
214 | device_info.ChannelInstance.data[1], | |
215 | device_info.ChannelInstance.data[0], | |
216 | device_info.ChannelInstance.data[5], | |
217 | device_info.ChannelInstance.data[4], | |
218 | device_info.ChannelInstance.data[7], | |
219 | device_info.ChannelInstance.data[6], | |
220 | device_info.ChannelInstance.data[8], | |
221 | device_info.ChannelInstance.data[9], | |
222 | device_info.ChannelInstance.data[10], | |
223 | device_info.ChannelInstance.data[11], | |
224 | device_info.ChannelInstance.data[12], | |
225 | device_info.ChannelInstance.data[13], | |
226 | device_info.ChannelInstance.data[14], | |
227 | device_info.ChannelInstance.data[15]); | |
228 | } else if (!strcmp(dev_attr->attr.name, "state")) { | |
3e7ee490 | 229 | return sprintf(buf, "%d\n", device_info.ChannelState); |
90c9960e | 230 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
3e7ee490 | 231 | return sprintf(buf, "%d\n", device_info.ChannelId); |
90c9960e | 232 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
3e7ee490 | 233 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
90c9960e | 234 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
3e7ee490 | 235 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
90c9960e | 236 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
3e7ee490 | 237 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
90c9960e GKH |
238 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
239 | return sprintf(buf, "%d\n", | |
240 | device_info.Outbound.BytesAvailToRead); | |
241 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { | |
242 | return sprintf(buf, "%d\n", | |
243 | device_info.Outbound.BytesAvailToWrite); | |
244 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { | |
3e7ee490 | 245 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
90c9960e | 246 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
3e7ee490 | 247 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
90c9960e | 248 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
3e7ee490 | 249 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
90c9960e GKH |
250 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
251 | return sprintf(buf, "%d\n", | |
252 | device_info.Inbound.BytesAvailToRead); | |
253 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { | |
254 | return sprintf(buf, "%d\n", | |
255 | device_info.Inbound.BytesAvailToWrite); | |
256 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { | |
3e7ee490 | 257 | return sprintf(buf, "%d\n", device_info.MonitorId); |
90c9960e | 258 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
3e7ee490 | 259 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
90c9960e | 260 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
3e7ee490 | 261 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
90c9960e GKH |
262 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
263 | return sprintf(buf, "%d\n", | |
264 | device_info.ServerMonitorConnectionId); | |
265 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { | |
3e7ee490 | 266 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
90c9960e | 267 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
3e7ee490 | 268 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
90c9960e GKH |
269 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
270 | return sprintf(buf, "%d\n", | |
271 | device_info.ClientMonitorConnectionId); | |
272 | } else { | |
3e7ee490 HJ |
273 | return 0; |
274 | } | |
275 | } | |
276 | ||
3e189519 | 277 | /* |
90c9960e GKH |
278 | * vmbus_bus_init -Main vmbus driver initialization routine. |
279 | * | |
280 | * Here, we | |
0686e4f4 LL |
281 | * - initialize the vmbus driver context |
282 | * - setup various driver entry points | |
283 | * - invoke the vmbus hv main init routine | |
284 | * - get the irq resource | |
285 | * - invoke the vmbus to add the vmbus root device | |
286 | * - setup the vmbus root device | |
287 | * - retrieve the channel offers | |
90c9960e | 288 | */ |
21707bed | 289 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
3e7ee490 | 290 | { |
90c9960e | 291 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
ee3d7ddf | 292 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
f916a34d | 293 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
90c9960e GKH |
294 | int ret; |
295 | unsigned int vector; | |
3e7ee490 | 296 | |
90c9960e GKH |
297 | /* |
298 | * Set this up to allow lower layer to callback to add/remove child | |
299 | * devices on the bus | |
300 | */ | |
3e7ee490 HJ |
301 | vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; |
302 | vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; | |
303 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; | |
304 | vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister; | |
305 | ||
454f18a9 | 306 | /* Call to bus driver to initialize */ |
21707bed | 307 | ret = drv_init(&vmbus_drv_obj->Base); |
90c9960e | 308 | if (ret != 0) { |
3e7ee490 HJ |
309 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); |
310 | goto cleanup; | |
311 | } | |
312 | ||
454f18a9 | 313 | /* Sanity checks */ |
90c9960e | 314 | if (!vmbus_drv_obj->Base.OnDeviceAdd) { |
3e7ee490 HJ |
315 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
316 | ret = -1; | |
317 | goto cleanup; | |
318 | } | |
319 | ||
320 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; | |
321 | ||
454f18a9 | 322 | /* Initialize the bus context */ |
90c9960e GKH |
323 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
324 | (unsigned long)vmbus_drv_obj); | |
325 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, | |
326 | (unsigned long)vmbus_drv_obj); | |
3e7ee490 | 327 | |
454f18a9 | 328 | /* Now, register the bus driver with LDM */ |
c19fbca3 | 329 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 330 | if (ret) { |
c19fbca3 BP |
331 | ret = -1; |
332 | goto cleanup; | |
333 | } | |
3e7ee490 | 334 | |
454f18a9 | 335 | /* Get the interrupt resource */ |
90c9960e GKH |
336 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
337 | vmbus_drv_obj->Base.name, NULL); | |
3e7ee490 | 338 | |
90c9960e GKH |
339 | if (ret != 0) { |
340 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
341 | vmbus_irq); | |
3e7ee490 HJ |
342 | |
343 | bus_unregister(&vmbus_drv_ctx->bus); | |
344 | ||
345 | ret = -1; | |
346 | goto cleanup; | |
347 | } | |
3e7ee490 | 348 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
349 | |
350 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
351 | ||
454f18a9 | 352 | /* Call to bus driver to add the root device */ |
f916a34d | 353 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
3e7ee490 HJ |
354 | |
355 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); | |
90c9960e GKH |
356 | if (ret != 0) { |
357 | DPRINT_ERR(VMBUS_DRV, | |
358 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
359 | |
360 | free_irq(vmbus_irq, NULL); | |
361 | ||
362 | bus_unregister(&vmbus_drv_ctx->bus); | |
363 | ||
364 | ret = -1; | |
365 | goto cleanup; | |
366 | } | |
454f18a9 | 367 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 368 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
90c9960e GKH |
369 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, |
370 | sizeof(struct hv_guid)); | |
371 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, | |
372 | sizeof(struct hv_guid)); | |
3e7ee490 | 373 | |
454f18a9 | 374 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 375 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
376 | /* NULL; vmbus_remove() does not get invoked */ |
377 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 378 | |
454f18a9 | 379 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
380 | dev_ctx->device.release = vmbus_bus_release; |
381 | ||
454f18a9 | 382 | /* Setup the bus as root device */ |
5d48a1c2 | 383 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
384 | if (ret) { |
385 | DPRINT_ERR(VMBUS_DRV, | |
386 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
387 | |
388 | free_irq(vmbus_irq, NULL); | |
389 | bus_unregister(&vmbus_drv_ctx->bus); | |
390 | ||
391 | ret = -1; | |
392 | goto cleanup; | |
393 | } | |
394 | ||
3e7ee490 HJ |
395 | |
396 | vmbus_drv_obj->GetChannelOffers(); | |
397 | ||
8b5d6d3b HZ |
398 | wait_for_completion(&hv_channel_ready); |
399 | ||
3e7ee490 | 400 | cleanup: |
3e7ee490 HJ |
401 | return ret; |
402 | } | |
403 | ||
3e189519 | 404 | /* |
90c9960e GKH |
405 | * vmbus_bus_exit - Terminate the vmbus driver. |
406 | * | |
407 | * This routine is opposite of vmbus_bus_init() | |
408 | */ | |
bd1de709 | 409 | static void vmbus_bus_exit(void) |
3e7ee490 | 410 | { |
ee3d7ddf | 411 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 412 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
3e7ee490 | 413 | |
f916a34d | 414 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
3e7ee490 | 415 | |
454f18a9 | 416 | /* Remove the root device */ |
3e7ee490 HJ |
417 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
418 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
419 | ||
420 | if (vmbus_drv_obj->Base.OnCleanup) | |
421 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
422 | ||
454f18a9 | 423 | /* Unregister the root bus device */ |
3e7ee490 HJ |
424 | device_unregister(&dev_ctx->device); |
425 | ||
426 | bus_unregister(&vmbus_drv_ctx->bus); | |
427 | ||
428 | free_irq(vmbus_irq, NULL); | |
429 | ||
430 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
431 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
432 | } |
433 | ||
3e189519 | 434 | |
90c9960e | 435 | /** |
3e189519 HJ |
436 | * vmbus_child_driver_register() - Register a vmbus's child driver |
437 | * @driver_ctx: Pointer to driver structure you want to register | |
438 | * | |
439 | * @driver_ctx is of type &struct driver_context | |
440 | * | |
441 | * Registers the given driver with Linux through the 'driver_register()' call | |
442 | * And sets up the hyper-v vmbus handling for this driver. | |
443 | * It will return the state of the 'driver_register()' call. | |
444 | * | |
445 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
446 | */ |
447 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 448 | { |
ee3d7ddf | 449 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 450 | int ret; |
3e7ee490 | 451 | |
90c9960e GKH |
452 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
453 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 454 | |
454f18a9 | 455 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
456 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
457 | ||
5d48a1c2 | 458 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
459 | |
460 | vmbus_drv_obj->GetChannelOffers(); | |
461 | ||
5d48a1c2 | 462 | return ret; |
3e7ee490 | 463 | } |
3e7ee490 HJ |
464 | EXPORT_SYMBOL(vmbus_child_driver_register); |
465 | ||
90c9960e | 466 | /** |
3e189519 HJ |
467 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
468 | * @driver_ctx: Pointer to driver structure you want to un-register | |
469 | * | |
470 | * @driver_ctx is of type &struct driver_context | |
471 | * | |
472 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
473 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
474 | * | |
475 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
476 | */ |
477 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 | 478 | { |
90c9960e GKH |
479 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
480 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
481 | |
482 | driver_unregister(&driver_ctx->driver); | |
483 | ||
484 | driver_ctx->driver.bus = NULL; | |
3e7ee490 | 485 | } |
3e7ee490 HJ |
486 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
487 | ||
90c9960e | 488 | /** |
3e189519 HJ |
489 | * vmbus_get_interface() - Get the vmbus channel interface. |
490 | * @interface: Pointer to channel interface structure | |
491 | * | |
492 | * Get the Hyper-V channel used for the driver. | |
493 | * | |
494 | * @interface is of type &struct vmbus_channel_interface | |
495 | * This is invoked by child/client driver that sits above vmbus. | |
90c9960e | 496 | * |
3e189519 | 497 | * Mainly used by Hyper-V drivers. |
90c9960e | 498 | */ |
ee3d7ddf | 499 | void vmbus_get_interface(struct vmbus_channel_interface *interface) |
3e7ee490 | 500 | { |
9e795a52 | 501 | *interface = vmbus_ops; |
3e7ee490 | 502 | } |
3e7ee490 HJ |
503 | EXPORT_SYMBOL(vmbus_get_interface); |
504 | ||
3e189519 HJ |
505 | /* |
506 | * vmbus_child_device_create - Creates and registers a new child device | |
507 | * on the vmbus. | |
90c9960e | 508 | */ |
daaa8cc3 GKH |
509 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
510 | struct hv_guid *instance, | |
511 | void *context) | |
3e7ee490 | 512 | { |
f916a34d | 513 | struct vm_device *child_device_ctx; |
3d3b5518 | 514 | struct hv_device *child_device_obj; |
3e7ee490 | 515 | |
454f18a9 | 516 | /* Allocate the new child device */ |
f916a34d | 517 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
518 | if (!child_device_ctx) { |
519 | DPRINT_ERR(VMBUS_DRV, | |
520 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
521 | return NULL; |
522 | } | |
523 | ||
524 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
525 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
526 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
527 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
528 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 529 | &child_device_ctx->device, |
daaa8cc3 GKH |
530 | type->data[3], type->data[2], type->data[1], type->data[0], |
531 | type->data[5], type->data[4], type->data[7], type->data[6], | |
532 | type->data[8], type->data[9], type->data[10], type->data[11], | |
533 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
534 | instance->data[3], instance->data[2], |
535 | instance->data[1], instance->data[0], | |
536 | instance->data[5], instance->data[4], | |
537 | instance->data[7], instance->data[6], | |
538 | instance->data[8], instance->data[9], | |
539 | instance->data[10], instance->data[11], | |
540 | instance->data[12], instance->data[13], | |
541 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
542 | |
543 | child_device_obj = &child_device_ctx->device_obj; | |
544 | child_device_obj->context = context; | |
9fb5cce4 MD |
545 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
546 | memcpy(&child_device_obj->deviceInstance, instance, | |
90c9960e | 547 | sizeof(struct hv_guid)); |
3e7ee490 | 548 | |
9fb5cce4 MD |
549 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
550 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 | 551 | |
3e7ee490 HJ |
552 | return child_device_obj; |
553 | } | |
554 | ||
3e189519 | 555 | /* |
90c9960e GKH |
556 | * vmbus_child_device_register - Register the child device on the specified bus |
557 | */ | |
558 | static int vmbus_child_device_register(struct hv_device *root_device_obj, | |
559 | struct hv_device *child_device_obj) | |
3e7ee490 | 560 | { |
90c9960e | 561 | int ret = 0; |
f916a34d HZ |
562 | struct vm_device *root_device_ctx = |
563 | to_vm_device(root_device_obj); | |
564 | struct vm_device *child_device_ctx = | |
565 | to_vm_device(child_device_obj); | |
f4888417 | 566 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 567 | |
90c9960e GKH |
568 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
569 | child_device_ctx); | |
454f18a9 | 570 | |
1bb40a25 | 571 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
572 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
573 | atomic_inc_return(&device_num)); | |
3e7ee490 | 574 | |
454f18a9 BP |
575 | /* The new device belongs to this bus */ |
576 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
577 | child_device_ctx->device.parent = &root_device_ctx->device; |
578 | child_device_ctx->device.release = vmbus_device_release; | |
579 | ||
90c9960e GKH |
580 | /* |
581 | * Register with the LDM. This will kick off the driver/device | |
582 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
583 | */ | |
3e7ee490 HJ |
584 | ret = device_register(&child_device_ctx->device); |
585 | ||
454f18a9 | 586 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
587 | ret = child_device_ctx->probe_error; |
588 | ||
589 | if (ret) | |
90c9960e GKH |
590 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
591 | &child_device_ctx->device); | |
3e7ee490 | 592 | else |
90c9960e GKH |
593 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
594 | &child_device_ctx->device); | |
3e7ee490 | 595 | |
3e7ee490 HJ |
596 | return ret; |
597 | } | |
598 | ||
3e189519 HJ |
599 | /* |
600 | * vmbus_child_device_unregister - Remove the specified child device | |
601 | * from the vmbus. | |
90c9960e | 602 | */ |
3d3b5518 | 603 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 604 | { |
f916a34d | 605 | struct vm_device *device_ctx = to_vm_device(device_obj); |
3e7ee490 | 606 | |
90c9960e GKH |
607 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
608 | &device_ctx->device); | |
3e7ee490 | 609 | |
90c9960e GKH |
610 | /* |
611 | * Kick off the process of unregistering the device. | |
612 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
613 | */ | |
3e7ee490 HJ |
614 | device_unregister(&device_ctx->device); |
615 | ||
90c9960e GKH |
616 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
617 | &device_ctx->device); | |
3e7ee490 HJ |
618 | } |
619 | ||
3e189519 | 620 | /* |
90c9960e GKH |
621 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. |
622 | */ | |
3d3b5518 | 623 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
3e7ee490 | 624 | { |
3e7ee490 HJ |
625 | } |
626 | ||
3e189519 | 627 | /* |
90c9960e GKH |
628 | * vmbus_uevent - add uevent for our device |
629 | * | |
630 | * This routine is invoked when a device is added or removed on the vmbus to | |
631 | * generate a uevent to udev in the userspace. The udev will then look at its | |
632 | * rule and the uevent generated here to load the appropriate driver | |
633 | */ | |
3e7ee490 HJ |
634 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
635 | { | |
f916a34d | 636 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
637 | int ret; |
638 | ||
90c9960e GKH |
639 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
640 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
641 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
642 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
643 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
644 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
645 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
646 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
647 | device_ctx->class_id.data[10], | |
648 | device_ctx->class_id.data[11], | |
649 | device_ctx->class_id.data[12], | |
650 | device_ctx->class_id.data[13], | |
651 | device_ctx->class_id.data[14], | |
652 | device_ctx->class_id.data[15]); | |
3e7ee490 | 653 | |
90c9960e GKH |
654 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
655 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
656 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
657 | device_ctx->class_id.data[3], | |
658 | device_ctx->class_id.data[2], | |
659 | device_ctx->class_id.data[1], | |
660 | device_ctx->class_id.data[0], | |
661 | device_ctx->class_id.data[5], | |
662 | device_ctx->class_id.data[4], | |
663 | device_ctx->class_id.data[7], | |
664 | device_ctx->class_id.data[6], | |
665 | device_ctx->class_id.data[8], | |
666 | device_ctx->class_id.data[9], | |
667 | device_ctx->class_id.data[10], | |
668 | device_ctx->class_id.data[11], | |
669 | device_ctx->class_id.data[12], | |
670 | device_ctx->class_id.data[13], | |
671 | device_ctx->class_id.data[14], | |
672 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
673 | |
674 | if (ret) | |
3e7ee490 | 675 | return ret; |
3e7ee490 | 676 | |
90c9960e GKH |
677 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
678 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
679 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
680 | device_ctx->device_id.data[3], | |
681 | device_ctx->device_id.data[2], | |
682 | device_ctx->device_id.data[1], | |
683 | device_ctx->device_id.data[0], | |
684 | device_ctx->device_id.data[5], | |
685 | device_ctx->device_id.data[4], | |
686 | device_ctx->device_id.data[7], | |
687 | device_ctx->device_id.data[6], | |
688 | device_ctx->device_id.data[8], | |
689 | device_ctx->device_id.data[9], | |
690 | device_ctx->device_id.data[10], | |
691 | device_ctx->device_id.data[11], | |
692 | device_ctx->device_id.data[12], | |
693 | device_ctx->device_id.data[13], | |
694 | device_ctx->device_id.data[14], | |
695 | device_ctx->device_id.data[15]); | |
3e7ee490 | 696 | if (ret) |
3e7ee490 | 697 | return ret; |
3e7ee490 | 698 | |
3e7ee490 HJ |
699 | return 0; |
700 | } | |
701 | ||
3e189519 | 702 | /* |
90c9960e GKH |
703 | * vmbus_match - Attempt to match the specified device to the specified driver |
704 | */ | |
3e7ee490 HJ |
705 | static int vmbus_match(struct device *device, struct device_driver *driver) |
706 | { | |
90c9960e | 707 | int match = 0; |
3e7ee490 | 708 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 709 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 710 | |
454f18a9 | 711 | /* We found our driver ? */ |
90c9960e GKH |
712 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
713 | sizeof(struct hv_guid)) == 0) { | |
714 | /* | |
715 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
716 | * it here to access the struct hv_driver field | |
717 | */ | |
718 | struct vmbus_driver_context *vmbus_drv_ctx = | |
719 | (struct vmbus_driver_context *)driver_ctx; | |
720 | ||
3e7ee490 | 721 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
90c9960e GKH |
722 | DPRINT_INFO(VMBUS_DRV, |
723 | "device object (%p) set to driver object (%p)", | |
724 | &device_ctx->device_obj, | |
725 | device_ctx->device_obj.Driver); | |
3e7ee490 HJ |
726 | |
727 | match = 1; | |
728 | } | |
3e7ee490 HJ |
729 | return match; |
730 | } | |
731 | ||
3e189519 | 732 | /* |
90c9960e GKH |
733 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
734 | * | |
735 | * We need a callback because we cannot invoked device_unregister() inside | |
736 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
737 | * i.e. we cannot call device_unregister() inside device_register() | |
738 | */ | |
3e7ee490 | 739 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 740 | { |
f916a34d | 741 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 | 742 | |
90c9960e GKH |
743 | /* |
744 | * Kick off the process of unregistering the device. | |
745 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
746 | */ | |
3e7ee490 HJ |
747 | device_unregister(&device_ctx->device); |
748 | ||
454f18a9 | 749 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
750 | } |
751 | ||
3e189519 | 752 | /* |
90c9960e GKH |
753 | * vmbus_probe - Add the new vmbus's child device |
754 | */ | |
3e7ee490 HJ |
755 | static int vmbus_probe(struct device *child_device) |
756 | { | |
90c9960e GKH |
757 | int ret = 0; |
758 | struct driver_context *driver_ctx = | |
759 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
760 | struct vm_device *device_ctx = |
761 | device_to_vm_device(child_device); | |
3e7ee490 | 762 | |
454f18a9 | 763 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 764 | if (driver_ctx->probe) { |
3e7ee490 | 765 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
766 | if (ret != 0) { |
767 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
768 | "(%p) on driver %s (%d)...", | |
769 | dev_name(child_device), child_device, | |
770 | child_device->driver->name, ret); | |
771 | ||
772 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
773 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
774 | schedule_work(&device_ctx->probe_failed_work_item); |
775 | } | |
90c9960e GKH |
776 | } else { |
777 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
778 | child_device->driver->name); | |
3e7ee490 HJ |
779 | ret = -1; |
780 | } | |
3e7ee490 HJ |
781 | return ret; |
782 | } | |
783 | ||
3e189519 | 784 | /* |
90c9960e GKH |
785 | * vmbus_remove - Remove a vmbus device |
786 | */ | |
3e7ee490 HJ |
787 | static int vmbus_remove(struct device *child_device) |
788 | { | |
90c9960e | 789 | int ret; |
3e7ee490 HJ |
790 | struct driver_context *driver_ctx; |
791 | ||
454f18a9 | 792 | /* Special case root bus device */ |
90c9960e GKH |
793 | if (child_device->parent == NULL) { |
794 | /* | |
795 | * No-op since it is statically defined and handle in | |
796 | * vmbus_bus_exit() | |
797 | */ | |
3e7ee490 HJ |
798 | return 0; |
799 | } | |
800 | ||
90c9960e | 801 | if (child_device->driver) { |
3e7ee490 HJ |
802 | driver_ctx = driver_to_driver_context(child_device->driver); |
803 | ||
90c9960e GKH |
804 | /* |
805 | * Let the specific open-source driver handles the removal if | |
806 | * it can | |
807 | */ | |
808 | if (driver_ctx->remove) { | |
3e7ee490 | 809 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
810 | } else { |
811 | DPRINT_ERR(VMBUS_DRV, | |
812 | "remove() method not set for driver - %s", | |
813 | child_device->driver->name); | |
3e7ee490 HJ |
814 | ret = -1; |
815 | } | |
816 | } | |
3e7ee490 | 817 | |
3e7ee490 HJ |
818 | return 0; |
819 | } | |
820 | ||
3e189519 | 821 | /* |
90c9960e GKH |
822 | * vmbus_shutdown - Shutdown a vmbus device |
823 | */ | |
3e7ee490 HJ |
824 | static void vmbus_shutdown(struct device *child_device) |
825 | { | |
826 | struct driver_context *driver_ctx; | |
827 | ||
454f18a9 | 828 | /* Special case root bus device */ |
90c9960e GKH |
829 | if (child_device->parent == NULL) { |
830 | /* | |
831 | * No-op since it is statically defined and handle in | |
832 | * vmbus_bus_exit() | |
833 | */ | |
3e7ee490 HJ |
834 | return; |
835 | } | |
836 | ||
454f18a9 | 837 | /* The device may not be attached yet */ |
83c720ea | 838 | if (!child_device->driver) |
3e7ee490 | 839 | return; |
3e7ee490 HJ |
840 | |
841 | driver_ctx = driver_to_driver_context(child_device->driver); | |
842 | ||
454f18a9 | 843 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 844 | if (driver_ctx->shutdown) |
3e7ee490 | 845 | driver_ctx->shutdown(child_device); |
3e7ee490 | 846 | |
3e7ee490 HJ |
847 | return; |
848 | } | |
849 | ||
3e189519 | 850 | /* |
90c9960e GKH |
851 | * vmbus_bus_release - Final callback release of the vmbus root device |
852 | */ | |
3e7ee490 HJ |
853 | static void vmbus_bus_release(struct device *device) |
854 | { | |
689bf406 GKH |
855 | /* FIXME */ |
856 | /* Empty release functions are a bug, or a major sign | |
857 | * of a problem design, this MUST BE FIXED! */ | |
858 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
859 | WARN_ON(1); | |
3e7ee490 HJ |
860 | } |
861 | ||
3e189519 | 862 | /* |
90c9960e GKH |
863 | * vmbus_device_release - Final callback release of the vmbus child device |
864 | */ | |
3e7ee490 HJ |
865 | static void vmbus_device_release(struct device *device) |
866 | { | |
f916a34d | 867 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 868 | |
454f18a9 | 869 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
3e7ee490 HJ |
870 | kfree(device_ctx); |
871 | ||
454f18a9 | 872 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
873 | } |
874 | ||
3e189519 | 875 | /* |
90c9960e GKH |
876 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
877 | */ | |
3e7ee490 HJ |
878 | static void vmbus_msg_dpc(unsigned long data) |
879 | { | |
ee3d7ddf | 880 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 881 | |
a3810b0e | 882 | /* ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); */ |
3e7ee490 | 883 | |
454f18a9 | 884 | /* Call to bus driver to handle interrupt */ |
3e7ee490 | 885 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
886 | } |
887 | ||
3e189519 | 888 | /* |
90c9960e GKH |
889 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events |
890 | */ | |
3e7ee490 HJ |
891 | static void vmbus_event_dpc(unsigned long data) |
892 | { | |
ee3d7ddf | 893 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 894 | |
a3810b0e | 895 | /* ASSERT(vmbus_drv_obj->OnEventDpc != NULL); */ |
3e7ee490 | 896 | |
454f18a9 | 897 | /* Call to bus driver to handle interrupt */ |
3e7ee490 | 898 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
899 | } |
900 | ||
90c9960e | 901 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 902 | { |
ee3d7ddf | 903 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 904 | int ret; |
3e7ee490 | 905 | |
a3810b0e | 906 | /* ASSERT(vmbus_driver_obj->OnIsr != NULL); */ |
3e7ee490 | 907 | |
454f18a9 | 908 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
909 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
910 | ||
454f18a9 | 911 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
912 | if (ret > 0) { |
913 | if (test_bit(0, (unsigned long *)&ret)) | |
3e7ee490 | 914 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
3e7ee490 | 915 | |
90c9960e | 916 | if (test_bit(1, (unsigned long *)&ret)) |
3e7ee490 | 917 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
3e7ee490 | 918 | |
3e7ee490 | 919 | return IRQ_HANDLED; |
90c9960e | 920 | } else { |
3e7ee490 HJ |
921 | return IRQ_NONE; |
922 | } | |
923 | } | |
924 | ||
c22090fa GKH |
925 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
926 | { | |
927 | .ident = "Hyper-V", | |
928 | .matches = { | |
929 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
930 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
931 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
932 | }, | |
933 | }, | |
934 | { }, | |
935 | }; | |
936 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
937 | ||
3e7ee490 HJ |
938 | static int __init vmbus_init(void) |
939 | { | |
3e7ee490 HJ |
940 | DPRINT_INFO(VMBUS_DRV, |
941 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
942 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 943 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 944 | |
c22090fa GKH |
945 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
946 | return -ENODEV; | |
947 | ||
83c720ea | 948 | return vmbus_bus_init(VmbusInitialize); |
3e7ee490 HJ |
949 | } |
950 | ||
3e7ee490 HJ |
951 | static void __exit vmbus_exit(void) |
952 | { | |
3e7ee490 | 953 | vmbus_bus_exit(); |
90c9960e | 954 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
955 | } |
956 | ||
9a775dbd GKH |
957 | /* |
958 | * We use a PCI table to determine if we should autoload this driver This is | |
959 | * needed by distro tools to determine if the hyperv drivers should be | |
960 | * installed and/or configured. We don't do anything else with the table, but | |
961 | * it needs to be present. | |
9a775dbd | 962 | */ |
15f0beb1 | 963 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
964 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
965 | { 0 } | |
966 | }; | |
967 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
968 | ||
90c9960e | 969 | MODULE_LICENSE("GPL"); |
26c14cc1 | 970 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
971 | module_param(vmbus_irq, int, S_IRUGO); |
972 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
973 | |
974 | module_init(vmbus_init); | |
975 | module_exit(vmbus_exit); |