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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> |
26c14cc1 | 30 | #include "VersionInfo.h" |
4983b39a | 31 | #include "osd.h" |
645954c5 | 32 | #include "logging.h" |
870cde80 | 33 | #include "vmbus.h" |
3e7ee490 | 34 | |
3e7ee490 | 35 | |
454f18a9 | 36 | /* FIXME! We need to do this dynamically for PIC and APIC system */ |
90c9960e GKH |
37 | #define VMBUS_IRQ 0x5 |
38 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR | |
454f18a9 BP |
39 | |
40 | /* Main vmbus driver data structure */ | |
3e7ee490 | 41 | struct vmbus_driver_context { |
454f18a9 | 42 | /* !! These must be the first 2 fields !! */ |
90c9960e | 43 | /* FIXME, this is a bug */ |
454f18a9 BP |
44 | /* The driver field is not used in here. Instead, the bus field is */ |
45 | /* used to represent the driver */ | |
90c9960e | 46 | struct driver_context drv_ctx; |
ee3d7ddf | 47 | struct vmbus_driver drv_obj; |
3e7ee490 | 48 | |
90c9960e GKH |
49 | struct bus_type bus; |
50 | struct tasklet_struct msg_dpc; | |
51 | struct tasklet_struct event_dpc; | |
3e7ee490 | 52 | |
454f18a9 | 53 | /* The bus root device */ |
f916a34d | 54 | struct vm_device device_ctx; |
3e7ee490 HJ |
55 | }; |
56 | ||
3e7ee490 HJ |
57 | static int vmbus_match(struct device *device, struct device_driver *driver); |
58 | static int vmbus_probe(struct device *device); | |
59 | static int vmbus_remove(struct device *device); | |
60 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 61 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 HJ |
62 | static void vmbus_msg_dpc(unsigned long data); |
63 | static void vmbus_event_dpc(unsigned long data); | |
64 | ||
90c9960e | 65 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
66 | |
67 | static void vmbus_device_release(struct device *device); | |
68 | static void vmbus_bus_release(struct device *device); | |
69 | ||
90c9960e GKH |
70 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
71 | struct hv_guid *instance, | |
72 | void *context); | |
3d3b5518 | 73 | static void vmbus_child_device_destroy(struct hv_device *device_obj); |
90c9960e GKH |
74 | static int vmbus_child_device_register(struct hv_device *root_device_obj, |
75 | struct hv_device *child_device_obj); | |
3d3b5518 | 76 | static void vmbus_child_device_unregister(struct hv_device *child_device_obj); |
90c9960e GKH |
77 | static void vmbus_child_device_get_info(struct hv_device *device_obj, |
78 | struct hv_device_info *device_info); | |
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 | ||
3e189519 | 132 | /* |
90c9960e GKH |
133 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
134 | * | |
135 | * This is invoked when user does a | |
136 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
137 | */ | |
138 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
139 | struct device_attribute *dev_attr, | |
140 | char *buf) | |
3e7ee490 | 141 | { |
f916a34d | 142 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 143 | struct hv_device_info device_info; |
3e7ee490 | 144 | |
ee3d7ddf | 145 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 HJ |
146 | |
147 | vmbus_child_device_get_info(&device_ctx->device_obj, &device_info); | |
148 | ||
90c9960e GKH |
149 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
150 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
151 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
152 | device_info.ChannelType.data[3], | |
153 | device_info.ChannelType.data[2], | |
154 | device_info.ChannelType.data[1], | |
155 | device_info.ChannelType.data[0], | |
156 | device_info.ChannelType.data[5], | |
157 | device_info.ChannelType.data[4], | |
158 | device_info.ChannelType.data[7], | |
159 | device_info.ChannelType.data[6], | |
160 | device_info.ChannelType.data[8], | |
161 | device_info.ChannelType.data[9], | |
162 | device_info.ChannelType.data[10], | |
163 | device_info.ChannelType.data[11], | |
164 | device_info.ChannelType.data[12], | |
165 | device_info.ChannelType.data[13], | |
166 | device_info.ChannelType.data[14], | |
167 | device_info.ChannelType.data[15]); | |
168 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { | |
169 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
170 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
171 | device_info.ChannelInstance.data[3], | |
172 | device_info.ChannelInstance.data[2], | |
173 | device_info.ChannelInstance.data[1], | |
174 | device_info.ChannelInstance.data[0], | |
175 | device_info.ChannelInstance.data[5], | |
176 | device_info.ChannelInstance.data[4], | |
177 | device_info.ChannelInstance.data[7], | |
178 | device_info.ChannelInstance.data[6], | |
179 | device_info.ChannelInstance.data[8], | |
180 | device_info.ChannelInstance.data[9], | |
181 | device_info.ChannelInstance.data[10], | |
182 | device_info.ChannelInstance.data[11], | |
183 | device_info.ChannelInstance.data[12], | |
184 | device_info.ChannelInstance.data[13], | |
185 | device_info.ChannelInstance.data[14], | |
186 | device_info.ChannelInstance.data[15]); | |
187 | } else if (!strcmp(dev_attr->attr.name, "state")) { | |
3e7ee490 | 188 | return sprintf(buf, "%d\n", device_info.ChannelState); |
90c9960e | 189 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
3e7ee490 | 190 | return sprintf(buf, "%d\n", device_info.ChannelId); |
90c9960e | 191 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
3e7ee490 | 192 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
90c9960e | 193 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
3e7ee490 | 194 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
90c9960e | 195 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
3e7ee490 | 196 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
90c9960e GKH |
197 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
198 | return sprintf(buf, "%d\n", | |
199 | device_info.Outbound.BytesAvailToRead); | |
200 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { | |
201 | return sprintf(buf, "%d\n", | |
202 | device_info.Outbound.BytesAvailToWrite); | |
203 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { | |
3e7ee490 | 204 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
90c9960e | 205 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
3e7ee490 | 206 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
90c9960e | 207 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
3e7ee490 | 208 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
90c9960e GKH |
209 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
210 | return sprintf(buf, "%d\n", | |
211 | device_info.Inbound.BytesAvailToRead); | |
212 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { | |
213 | return sprintf(buf, "%d\n", | |
214 | device_info.Inbound.BytesAvailToWrite); | |
215 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { | |
3e7ee490 | 216 | return sprintf(buf, "%d\n", device_info.MonitorId); |
90c9960e | 217 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
3e7ee490 | 218 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
90c9960e | 219 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
3e7ee490 | 220 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
90c9960e GKH |
221 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
222 | return sprintf(buf, "%d\n", | |
223 | device_info.ServerMonitorConnectionId); | |
224 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { | |
3e7ee490 | 225 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
90c9960e | 226 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
3e7ee490 | 227 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
90c9960e GKH |
228 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
229 | return sprintf(buf, "%d\n", | |
230 | device_info.ClientMonitorConnectionId); | |
231 | } else { | |
3e7ee490 HJ |
232 | return 0; |
233 | } | |
234 | } | |
235 | ||
3e189519 | 236 | /* |
90c9960e GKH |
237 | * vmbus_bus_init -Main vmbus driver initialization routine. |
238 | * | |
239 | * Here, we | |
240 | * - initialize the vmbus driver context | |
241 | * - setup various driver entry points | |
242 | * - invoke the vmbus hv main init routine | |
243 | * - get the irq resource | |
244 | * - invoke the vmbus to add the vmbus root device | |
245 | * - setup the vmbus root device | |
246 | * - retrieve the channel offers | |
247 | */ | |
21707bed | 248 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
3e7ee490 | 249 | { |
90c9960e | 250 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
ee3d7ddf | 251 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
f916a34d | 252 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
90c9960e GKH |
253 | int ret; |
254 | unsigned int vector; | |
3e7ee490 HJ |
255 | |
256 | DPRINT_ENTER(VMBUS_DRV); | |
257 | ||
90c9960e GKH |
258 | /* |
259 | * Set this up to allow lower layer to callback to add/remove child | |
260 | * devices on the bus | |
261 | */ | |
3e7ee490 HJ |
262 | vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; |
263 | vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; | |
264 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; | |
265 | vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister; | |
266 | ||
454f18a9 | 267 | /* Call to bus driver to initialize */ |
21707bed | 268 | ret = drv_init(&vmbus_drv_obj->Base); |
90c9960e | 269 | if (ret != 0) { |
3e7ee490 HJ |
270 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); |
271 | goto cleanup; | |
272 | } | |
273 | ||
454f18a9 | 274 | /* Sanity checks */ |
90c9960e | 275 | if (!vmbus_drv_obj->Base.OnDeviceAdd) { |
3e7ee490 HJ |
276 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
277 | ret = -1; | |
278 | goto cleanup; | |
279 | } | |
280 | ||
281 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; | |
282 | ||
454f18a9 | 283 | /* Initialize the bus context */ |
90c9960e GKH |
284 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
285 | (unsigned long)vmbus_drv_obj); | |
286 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, | |
287 | (unsigned long)vmbus_drv_obj); | |
3e7ee490 | 288 | |
454f18a9 | 289 | /* Now, register the bus driver with LDM */ |
c19fbca3 | 290 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 291 | if (ret) { |
c19fbca3 BP |
292 | ret = -1; |
293 | goto cleanup; | |
294 | } | |
3e7ee490 | 295 | |
454f18a9 | 296 | /* Get the interrupt resource */ |
90c9960e GKH |
297 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
298 | vmbus_drv_obj->Base.name, NULL); | |
3e7ee490 | 299 | |
90c9960e GKH |
300 | if (ret != 0) { |
301 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
302 | vmbus_irq); | |
3e7ee490 HJ |
303 | |
304 | bus_unregister(&vmbus_drv_ctx->bus); | |
305 | ||
306 | ret = -1; | |
307 | goto cleanup; | |
308 | } | |
3e7ee490 | 309 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
310 | |
311 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
312 | ||
454f18a9 | 313 | /* Call to bus driver to add the root device */ |
f916a34d | 314 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
3e7ee490 HJ |
315 | |
316 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); | |
90c9960e GKH |
317 | if (ret != 0) { |
318 | DPRINT_ERR(VMBUS_DRV, | |
319 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
320 | |
321 | free_irq(vmbus_irq, NULL); | |
322 | ||
323 | bus_unregister(&vmbus_drv_ctx->bus); | |
324 | ||
325 | ret = -1; | |
326 | goto cleanup; | |
327 | } | |
454f18a9 | 328 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 329 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
90c9960e GKH |
330 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, |
331 | sizeof(struct hv_guid)); | |
332 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, | |
333 | sizeof(struct hv_guid)); | |
3e7ee490 | 334 | |
454f18a9 | 335 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 336 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
337 | /* NULL; vmbus_remove() does not get invoked */ |
338 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 339 | |
454f18a9 | 340 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
341 | dev_ctx->device.release = vmbus_bus_release; |
342 | ||
454f18a9 | 343 | /* Setup the bus as root device */ |
5d48a1c2 | 344 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
345 | if (ret) { |
346 | DPRINT_ERR(VMBUS_DRV, | |
347 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
348 | |
349 | free_irq(vmbus_irq, NULL); | |
350 | bus_unregister(&vmbus_drv_ctx->bus); | |
351 | ||
352 | ret = -1; | |
353 | goto cleanup; | |
354 | } | |
355 | ||
3e7ee490 HJ |
356 | |
357 | vmbus_drv_obj->GetChannelOffers(); | |
358 | ||
359 | cleanup: | |
360 | DPRINT_EXIT(VMBUS_DRV); | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
3e189519 | 365 | /* |
90c9960e GKH |
366 | * vmbus_bus_exit - Terminate the vmbus driver. |
367 | * | |
368 | * This routine is opposite of vmbus_bus_init() | |
369 | */ | |
bd1de709 | 370 | static void vmbus_bus_exit(void) |
3e7ee490 | 371 | { |
ee3d7ddf | 372 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 373 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
3e7ee490 | 374 | |
f916a34d | 375 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
3e7ee490 HJ |
376 | |
377 | DPRINT_ENTER(VMBUS_DRV); | |
378 | ||
454f18a9 | 379 | /* Remove the root device */ |
3e7ee490 HJ |
380 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
381 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
382 | ||
383 | if (vmbus_drv_obj->Base.OnCleanup) | |
384 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
385 | ||
454f18a9 | 386 | /* Unregister the root bus device */ |
3e7ee490 HJ |
387 | device_unregister(&dev_ctx->device); |
388 | ||
389 | bus_unregister(&vmbus_drv_ctx->bus); | |
390 | ||
391 | free_irq(vmbus_irq, NULL); | |
392 | ||
393 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
394 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
395 | ||
396 | DPRINT_EXIT(VMBUS_DRV); | |
397 | ||
398 | return; | |
399 | } | |
400 | ||
3e189519 | 401 | |
90c9960e | 402 | /** |
3e189519 HJ |
403 | * vmbus_child_driver_register() - Register a vmbus's child driver |
404 | * @driver_ctx: Pointer to driver structure you want to register | |
405 | * | |
406 | * @driver_ctx is of type &struct driver_context | |
407 | * | |
408 | * Registers the given driver with Linux through the 'driver_register()' call | |
409 | * And sets up the hyper-v vmbus handling for this driver. | |
410 | * It will return the state of the 'driver_register()' call. | |
411 | * | |
412 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
413 | */ |
414 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 415 | { |
ee3d7ddf | 416 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 417 | int ret; |
3e7ee490 HJ |
418 | |
419 | DPRINT_ENTER(VMBUS_DRV); | |
420 | ||
90c9960e GKH |
421 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
422 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 423 | |
454f18a9 | 424 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
425 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
426 | ||
5d48a1c2 | 427 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
428 | |
429 | vmbus_drv_obj->GetChannelOffers(); | |
430 | ||
431 | DPRINT_EXIT(VMBUS_DRV); | |
5d48a1c2 BP |
432 | |
433 | return ret; | |
3e7ee490 | 434 | } |
3e7ee490 HJ |
435 | EXPORT_SYMBOL(vmbus_child_driver_register); |
436 | ||
90c9960e | 437 | /** |
3e189519 HJ |
438 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
439 | * @driver_ctx: Pointer to driver structure you want to un-register | |
440 | * | |
441 | * @driver_ctx is of type &struct driver_context | |
442 | * | |
443 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
444 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
445 | * | |
446 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
447 | */ |
448 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 HJ |
449 | { |
450 | DPRINT_ENTER(VMBUS_DRV); | |
451 | ||
90c9960e GKH |
452 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
453 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
454 | |
455 | driver_unregister(&driver_ctx->driver); | |
456 | ||
457 | driver_ctx->driver.bus = NULL; | |
458 | ||
459 | DPRINT_EXIT(VMBUS_DRV); | |
460 | } | |
3e7ee490 HJ |
461 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
462 | ||
90c9960e | 463 | /** |
3e189519 HJ |
464 | * vmbus_get_interface() - Get the vmbus channel interface. |
465 | * @interface: Pointer to channel interface structure | |
466 | * | |
467 | * Get the Hyper-V channel used for the driver. | |
468 | * | |
469 | * @interface is of type &struct vmbus_channel_interface | |
470 | * This is invoked by child/client driver that sits above vmbus. | |
90c9960e | 471 | * |
3e189519 | 472 | * Mainly used by Hyper-V drivers. |
90c9960e | 473 | */ |
ee3d7ddf | 474 | void vmbus_get_interface(struct vmbus_channel_interface *interface) |
3e7ee490 | 475 | { |
ee3d7ddf | 476 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
477 | |
478 | vmbus_drv_obj->GetChannelInterface(interface); | |
479 | } | |
3e7ee490 HJ |
480 | EXPORT_SYMBOL(vmbus_get_interface); |
481 | ||
3e189519 | 482 | /* |
90c9960e GKH |
483 | * vmbus_child_device_get_info - Get the vmbus child device info. |
484 | * | |
485 | * This is invoked to display various device attributes in sysfs. | |
486 | */ | |
487 | static void vmbus_child_device_get_info(struct hv_device *device_obj, | |
488 | struct hv_device_info *device_info) | |
3e7ee490 | 489 | { |
ee3d7ddf | 490 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
491 | |
492 | vmbus_drv_obj->GetChannelInfo(device_obj, device_info); | |
493 | } | |
494 | ||
3e189519 HJ |
495 | /* |
496 | * vmbus_child_device_create - Creates and registers a new child device | |
497 | * on the vmbus. | |
90c9960e | 498 | */ |
daaa8cc3 GKH |
499 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
500 | struct hv_guid *instance, | |
501 | void *context) | |
3e7ee490 | 502 | { |
f916a34d | 503 | struct vm_device *child_device_ctx; |
3d3b5518 | 504 | struct hv_device *child_device_obj; |
3e7ee490 HJ |
505 | |
506 | DPRINT_ENTER(VMBUS_DRV); | |
507 | ||
454f18a9 | 508 | /* Allocate the new child device */ |
f916a34d | 509 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
510 | if (!child_device_ctx) { |
511 | DPRINT_ERR(VMBUS_DRV, | |
512 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
513 | DPRINT_EXIT(VMBUS_DRV); |
514 | ||
515 | return NULL; | |
516 | } | |
517 | ||
518 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
519 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
520 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
521 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
522 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 523 | &child_device_ctx->device, |
daaa8cc3 GKH |
524 | type->data[3], type->data[2], type->data[1], type->data[0], |
525 | type->data[5], type->data[4], type->data[7], type->data[6], | |
526 | type->data[8], type->data[9], type->data[10], type->data[11], | |
527 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
528 | instance->data[3], instance->data[2], |
529 | instance->data[1], instance->data[0], | |
530 | instance->data[5], instance->data[4], | |
531 | instance->data[7], instance->data[6], | |
532 | instance->data[8], instance->data[9], | |
533 | instance->data[10], instance->data[11], | |
534 | instance->data[12], instance->data[13], | |
535 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
536 | |
537 | child_device_obj = &child_device_ctx->device_obj; | |
538 | child_device_obj->context = context; | |
9fb5cce4 MD |
539 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
540 | memcpy(&child_device_obj->deviceInstance, instance, | |
90c9960e | 541 | sizeof(struct hv_guid)); |
3e7ee490 | 542 | |
9fb5cce4 MD |
543 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
544 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 HJ |
545 | |
546 | DPRINT_EXIT(VMBUS_DRV); | |
547 | ||
548 | return child_device_obj; | |
549 | } | |
550 | ||
3e189519 | 551 | /* |
90c9960e GKH |
552 | * vmbus_child_device_register - Register the child device on the specified bus |
553 | */ | |
554 | static int vmbus_child_device_register(struct hv_device *root_device_obj, | |
555 | struct hv_device *child_device_obj) | |
3e7ee490 | 556 | { |
90c9960e | 557 | int ret = 0; |
f916a34d HZ |
558 | struct vm_device *root_device_ctx = |
559 | to_vm_device(root_device_obj); | |
560 | struct vm_device *child_device_ctx = | |
561 | to_vm_device(child_device_obj); | |
f4888417 | 562 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 HJ |
563 | |
564 | DPRINT_ENTER(VMBUS_DRV); | |
565 | ||
90c9960e GKH |
566 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
567 | child_device_ctx); | |
454f18a9 | 568 | |
1bb40a25 | 569 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
570 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
571 | atomic_inc_return(&device_num)); | |
3e7ee490 | 572 | |
454f18a9 BP |
573 | /* The new device belongs to this bus */ |
574 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
575 | child_device_ctx->device.parent = &root_device_ctx->device; |
576 | child_device_ctx->device.release = vmbus_device_release; | |
577 | ||
90c9960e GKH |
578 | /* |
579 | * Register with the LDM. This will kick off the driver/device | |
580 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
581 | */ | |
3e7ee490 HJ |
582 | ret = device_register(&child_device_ctx->device); |
583 | ||
454f18a9 | 584 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
585 | ret = child_device_ctx->probe_error; |
586 | ||
587 | if (ret) | |
90c9960e GKH |
588 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
589 | &child_device_ctx->device); | |
3e7ee490 | 590 | else |
90c9960e GKH |
591 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
592 | &child_device_ctx->device); | |
3e7ee490 | 593 | |
3e7ee490 HJ |
594 | DPRINT_EXIT(VMBUS_DRV); |
595 | ||
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 HJ |
606 | |
607 | DPRINT_ENTER(VMBUS_DRV); | |
608 | ||
90c9960e GKH |
609 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
610 | &device_ctx->device); | |
3e7ee490 | 611 | |
90c9960e GKH |
612 | /* |
613 | * Kick off the process of unregistering the device. | |
614 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
615 | */ | |
3e7ee490 HJ |
616 | device_unregister(&device_ctx->device); |
617 | ||
90c9960e GKH |
618 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
619 | &device_ctx->device); | |
3e7ee490 HJ |
620 | |
621 | DPRINT_EXIT(VMBUS_DRV); | |
622 | } | |
623 | ||
3e189519 | 624 | /* |
90c9960e GKH |
625 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. |
626 | */ | |
3d3b5518 | 627 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
3e7ee490 HJ |
628 | { |
629 | DPRINT_ENTER(VMBUS_DRV); | |
630 | ||
631 | DPRINT_EXIT(VMBUS_DRV); | |
632 | } | |
633 | ||
3e189519 | 634 | /* |
90c9960e GKH |
635 | * vmbus_uevent - add uevent for our device |
636 | * | |
637 | * This routine is invoked when a device is added or removed on the vmbus to | |
638 | * generate a uevent to udev in the userspace. The udev will then look at its | |
639 | * rule and the uevent generated here to load the appropriate driver | |
640 | */ | |
3e7ee490 HJ |
641 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
642 | { | |
f916a34d | 643 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
644 | int ret; |
645 | ||
646 | DPRINT_ENTER(VMBUS_DRV); | |
647 | ||
90c9960e GKH |
648 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
649 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
650 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
651 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
652 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
653 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
654 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
655 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
656 | device_ctx->class_id.data[10], | |
657 | device_ctx->class_id.data[11], | |
658 | device_ctx->class_id.data[12], | |
659 | device_ctx->class_id.data[13], | |
660 | device_ctx->class_id.data[14], | |
661 | device_ctx->class_id.data[15]); | |
3e7ee490 | 662 | |
90c9960e GKH |
663 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
664 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
665 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
666 | device_ctx->class_id.data[3], | |
667 | device_ctx->class_id.data[2], | |
668 | device_ctx->class_id.data[1], | |
669 | device_ctx->class_id.data[0], | |
670 | device_ctx->class_id.data[5], | |
671 | device_ctx->class_id.data[4], | |
672 | device_ctx->class_id.data[7], | |
673 | device_ctx->class_id.data[6], | |
674 | device_ctx->class_id.data[8], | |
675 | device_ctx->class_id.data[9], | |
676 | device_ctx->class_id.data[10], | |
677 | device_ctx->class_id.data[11], | |
678 | device_ctx->class_id.data[12], | |
679 | device_ctx->class_id.data[13], | |
680 | device_ctx->class_id.data[14], | |
681 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
682 | |
683 | if (ret) | |
3e7ee490 | 684 | return ret; |
3e7ee490 | 685 | |
90c9960e GKH |
686 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
687 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
688 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
689 | device_ctx->device_id.data[3], | |
690 | device_ctx->device_id.data[2], | |
691 | device_ctx->device_id.data[1], | |
692 | device_ctx->device_id.data[0], | |
693 | device_ctx->device_id.data[5], | |
694 | device_ctx->device_id.data[4], | |
695 | device_ctx->device_id.data[7], | |
696 | device_ctx->device_id.data[6], | |
697 | device_ctx->device_id.data[8], | |
698 | device_ctx->device_id.data[9], | |
699 | device_ctx->device_id.data[10], | |
700 | device_ctx->device_id.data[11], | |
701 | device_ctx->device_id.data[12], | |
702 | device_ctx->device_id.data[13], | |
703 | device_ctx->device_id.data[14], | |
704 | device_ctx->device_id.data[15]); | |
3e7ee490 | 705 | if (ret) |
3e7ee490 | 706 | return ret; |
3e7ee490 | 707 | |
3e7ee490 HJ |
708 | DPRINT_EXIT(VMBUS_DRV); |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
3e189519 | 713 | /* |
90c9960e GKH |
714 | * vmbus_match - Attempt to match the specified device to the specified driver |
715 | */ | |
3e7ee490 HJ |
716 | static int vmbus_match(struct device *device, struct device_driver *driver) |
717 | { | |
90c9960e | 718 | int match = 0; |
3e7ee490 | 719 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 720 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
721 | |
722 | DPRINT_ENTER(VMBUS_DRV); | |
723 | ||
454f18a9 | 724 | /* We found our driver ? */ |
90c9960e GKH |
725 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
726 | sizeof(struct hv_guid)) == 0) { | |
727 | /* | |
728 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
729 | * it here to access the struct hv_driver field | |
730 | */ | |
731 | struct vmbus_driver_context *vmbus_drv_ctx = | |
732 | (struct vmbus_driver_context *)driver_ctx; | |
733 | ||
3e7ee490 | 734 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
90c9960e GKH |
735 | DPRINT_INFO(VMBUS_DRV, |
736 | "device object (%p) set to driver object (%p)", | |
737 | &device_ctx->device_obj, | |
738 | device_ctx->device_obj.Driver); | |
3e7ee490 HJ |
739 | |
740 | match = 1; | |
741 | } | |
742 | ||
743 | DPRINT_EXIT(VMBUS_DRV); | |
744 | ||
745 | return match; | |
746 | } | |
747 | ||
3e189519 | 748 | /* |
90c9960e GKH |
749 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
750 | * | |
751 | * We need a callback because we cannot invoked device_unregister() inside | |
752 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
753 | * i.e. we cannot call device_unregister() inside device_register() | |
754 | */ | |
3e7ee490 | 755 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 756 | { |
f916a34d | 757 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 HJ |
758 | |
759 | DPRINT_ENTER(VMBUS_DRV); | |
760 | ||
90c9960e GKH |
761 | /* |
762 | * Kick off the process of unregistering the device. | |
763 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
764 | */ | |
3e7ee490 HJ |
765 | device_unregister(&device_ctx->device); |
766 | ||
454f18a9 | 767 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
768 | DPRINT_EXIT(VMBUS_DRV); |
769 | } | |
770 | ||
3e189519 | 771 | /* |
90c9960e GKH |
772 | * vmbus_probe - Add the new vmbus's child device |
773 | */ | |
3e7ee490 HJ |
774 | static int vmbus_probe(struct device *child_device) |
775 | { | |
90c9960e GKH |
776 | int ret = 0; |
777 | struct driver_context *driver_ctx = | |
778 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
779 | struct vm_device *device_ctx = |
780 | device_to_vm_device(child_device); | |
3e7ee490 HJ |
781 | |
782 | DPRINT_ENTER(VMBUS_DRV); | |
783 | ||
454f18a9 | 784 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 785 | if (driver_ctx->probe) { |
3e7ee490 | 786 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
787 | if (ret != 0) { |
788 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
789 | "(%p) on driver %s (%d)...", | |
790 | dev_name(child_device), child_device, | |
791 | child_device->driver->name, ret); | |
792 | ||
793 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
794 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
795 | schedule_work(&device_ctx->probe_failed_work_item); |
796 | } | |
90c9960e GKH |
797 | } else { |
798 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
799 | child_device->driver->name); | |
3e7ee490 HJ |
800 | ret = -1; |
801 | } | |
802 | ||
803 | DPRINT_EXIT(VMBUS_DRV); | |
804 | return ret; | |
805 | } | |
806 | ||
3e189519 | 807 | /* |
90c9960e GKH |
808 | * vmbus_remove - Remove a vmbus device |
809 | */ | |
3e7ee490 HJ |
810 | static int vmbus_remove(struct device *child_device) |
811 | { | |
90c9960e | 812 | int ret; |
3e7ee490 HJ |
813 | struct driver_context *driver_ctx; |
814 | ||
815 | DPRINT_ENTER(VMBUS_DRV); | |
816 | ||
454f18a9 | 817 | /* Special case root bus device */ |
90c9960e GKH |
818 | if (child_device->parent == NULL) { |
819 | /* | |
820 | * No-op since it is statically defined and handle in | |
821 | * vmbus_bus_exit() | |
822 | */ | |
3e7ee490 HJ |
823 | DPRINT_EXIT(VMBUS_DRV); |
824 | return 0; | |
825 | } | |
826 | ||
90c9960e | 827 | if (child_device->driver) { |
3e7ee490 HJ |
828 | driver_ctx = driver_to_driver_context(child_device->driver); |
829 | ||
90c9960e GKH |
830 | /* |
831 | * Let the specific open-source driver handles the removal if | |
832 | * it can | |
833 | */ | |
834 | if (driver_ctx->remove) { | |
3e7ee490 | 835 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
836 | } else { |
837 | DPRINT_ERR(VMBUS_DRV, | |
838 | "remove() method not set for driver - %s", | |
839 | child_device->driver->name); | |
3e7ee490 HJ |
840 | ret = -1; |
841 | } | |
842 | } | |
3e7ee490 HJ |
843 | |
844 | DPRINT_EXIT(VMBUS_DRV); | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
3e189519 | 849 | /* |
90c9960e GKH |
850 | * vmbus_shutdown - Shutdown a vmbus device |
851 | */ | |
3e7ee490 HJ |
852 | static void vmbus_shutdown(struct device *child_device) |
853 | { | |
854 | struct driver_context *driver_ctx; | |
855 | ||
856 | DPRINT_ENTER(VMBUS_DRV); | |
857 | ||
454f18a9 | 858 | /* Special case root bus device */ |
90c9960e GKH |
859 | if (child_device->parent == NULL) { |
860 | /* | |
861 | * No-op since it is statically defined and handle in | |
862 | * vmbus_bus_exit() | |
863 | */ | |
3e7ee490 HJ |
864 | DPRINT_EXIT(VMBUS_DRV); |
865 | return; | |
866 | } | |
867 | ||
454f18a9 | 868 | /* The device may not be attached yet */ |
90c9960e | 869 | if (!child_device->driver) { |
3e7ee490 HJ |
870 | DPRINT_EXIT(VMBUS_DRV); |
871 | return; | |
872 | } | |
873 | ||
874 | driver_ctx = driver_to_driver_context(child_device->driver); | |
875 | ||
454f18a9 | 876 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 877 | if (driver_ctx->shutdown) |
3e7ee490 | 878 | driver_ctx->shutdown(child_device); |
3e7ee490 HJ |
879 | |
880 | DPRINT_EXIT(VMBUS_DRV); | |
881 | ||
882 | return; | |
883 | } | |
884 | ||
3e189519 | 885 | /* |
90c9960e GKH |
886 | * vmbus_bus_release - Final callback release of the vmbus root device |
887 | */ | |
3e7ee490 HJ |
888 | static void vmbus_bus_release(struct device *device) |
889 | { | |
890 | DPRINT_ENTER(VMBUS_DRV); | |
689bf406 GKH |
891 | /* FIXME */ |
892 | /* Empty release functions are a bug, or a major sign | |
893 | * of a problem design, this MUST BE FIXED! */ | |
894 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
895 | WARN_ON(1); | |
3e7ee490 HJ |
896 | DPRINT_EXIT(VMBUS_DRV); |
897 | } | |
898 | ||
3e189519 | 899 | /* |
90c9960e GKH |
900 | * vmbus_device_release - Final callback release of the vmbus child device |
901 | */ | |
3e7ee490 HJ |
902 | static void vmbus_device_release(struct device *device) |
903 | { | |
f916a34d | 904 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
905 | |
906 | DPRINT_ENTER(VMBUS_DRV); | |
907 | ||
454f18a9 | 908 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
3e7ee490 HJ |
909 | kfree(device_ctx); |
910 | ||
454f18a9 | 911 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
912 | DPRINT_EXIT(VMBUS_DRV); |
913 | ||
914 | return; | |
915 | } | |
916 | ||
3e189519 | 917 | /* |
90c9960e GKH |
918 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
919 | */ | |
3e7ee490 HJ |
920 | static void vmbus_msg_dpc(unsigned long data) |
921 | { | |
ee3d7ddf | 922 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 HJ |
923 | |
924 | DPRINT_ENTER(VMBUS_DRV); | |
925 | ||
926 | ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); | |
927 | ||
454f18a9 | 928 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
929 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
930 | ||
931 | DPRINT_EXIT(VMBUS_DRV); | |
932 | } | |
933 | ||
3e189519 | 934 | /* |
90c9960e GKH |
935 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events |
936 | */ | |
3e7ee490 HJ |
937 | static void vmbus_event_dpc(unsigned long data) |
938 | { | |
ee3d7ddf | 939 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 HJ |
940 | |
941 | DPRINT_ENTER(VMBUS_DRV); | |
942 | ||
943 | ASSERT(vmbus_drv_obj->OnEventDpc != NULL); | |
944 | ||
454f18a9 | 945 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
946 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
947 | ||
948 | DPRINT_EXIT(VMBUS_DRV); | |
949 | } | |
950 | ||
90c9960e | 951 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 952 | { |
ee3d7ddf | 953 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 954 | int ret; |
3e7ee490 HJ |
955 | |
956 | DPRINT_ENTER(VMBUS_DRV); | |
957 | ||
958 | ASSERT(vmbus_driver_obj->OnIsr != NULL); | |
959 | ||
454f18a9 | 960 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
961 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
962 | ||
454f18a9 | 963 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
964 | if (ret > 0) { |
965 | if (test_bit(0, (unsigned long *)&ret)) | |
3e7ee490 | 966 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
3e7ee490 | 967 | |
90c9960e | 968 | if (test_bit(1, (unsigned long *)&ret)) |
3e7ee490 | 969 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
3e7ee490 HJ |
970 | |
971 | DPRINT_EXIT(VMBUS_DRV); | |
972 | return IRQ_HANDLED; | |
90c9960e | 973 | } else { |
3e7ee490 HJ |
974 | DPRINT_EXIT(VMBUS_DRV); |
975 | return IRQ_NONE; | |
976 | } | |
977 | } | |
978 | ||
c22090fa GKH |
979 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
980 | { | |
981 | .ident = "Hyper-V", | |
982 | .matches = { | |
983 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
984 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
985 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
986 | }, | |
987 | }, | |
988 | { }, | |
989 | }; | |
990 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
991 | ||
3e7ee490 HJ |
992 | static int __init vmbus_init(void) |
993 | { | |
90c9960e | 994 | int ret = 0; |
3e7ee490 HJ |
995 | |
996 | DPRINT_ENTER(VMBUS_DRV); | |
997 | ||
998 | DPRINT_INFO(VMBUS_DRV, | |
999 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
1000 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 1001 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 1002 | |
c22090fa GKH |
1003 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
1004 | return -ENODEV; | |
1005 | ||
3e7ee490 HJ |
1006 | ret = vmbus_bus_init(VmbusInitialize); |
1007 | ||
1008 | DPRINT_EXIT(VMBUS_DRV); | |
1009 | return ret; | |
1010 | } | |
1011 | ||
3e7ee490 HJ |
1012 | static void __exit vmbus_exit(void) |
1013 | { | |
1014 | DPRINT_ENTER(VMBUS_DRV); | |
1015 | ||
1016 | vmbus_bus_exit(); | |
90c9960e | 1017 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 1018 | DPRINT_EXIT(VMBUS_DRV); |
3e7ee490 HJ |
1019 | return; |
1020 | } | |
1021 | ||
9a775dbd GKH |
1022 | /* |
1023 | * We use a PCI table to determine if we should autoload this driver This is | |
1024 | * needed by distro tools to determine if the hyperv drivers should be | |
1025 | * installed and/or configured. We don't do anything else with the table, but | |
1026 | * it needs to be present. | |
9a775dbd GKH |
1027 | */ |
1028 | const static struct pci_device_id microsoft_hv_pci_table[] = { | |
1029 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ | |
1030 | { 0 } | |
1031 | }; | |
1032 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1033 | ||
90c9960e | 1034 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1035 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1036 | module_param(vmbus_irq, int, S_IRUGO); |
1037 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1038 | |
1039 | module_init(vmbus_init); | |
1040 | module_exit(vmbus_exit); |