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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> |
26c14cc1 | 29 | #include "VersionInfo.h" |
4983b39a | 30 | #include "osd.h" |
645954c5 | 31 | #include "logging.h" |
870cde80 | 32 | #include "vmbus.h" |
3e7ee490 | 33 | |
3e7ee490 | 34 | |
454f18a9 | 35 | /* FIXME! We need to do this dynamically for PIC and APIC system */ |
90c9960e GKH |
36 | #define VMBUS_IRQ 0x5 |
37 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR | |
454f18a9 BP |
38 | |
39 | /* Main vmbus driver data structure */ | |
3e7ee490 | 40 | struct vmbus_driver_context { |
454f18a9 | 41 | /* !! These must be the first 2 fields !! */ |
90c9960e | 42 | /* FIXME, this is a bug */ |
454f18a9 BP |
43 | /* The driver field is not used in here. Instead, the bus field is */ |
44 | /* used to represent the driver */ | |
90c9960e | 45 | struct driver_context drv_ctx; |
ee3d7ddf | 46 | struct vmbus_driver drv_obj; |
3e7ee490 | 47 | |
90c9960e GKH |
48 | struct bus_type bus; |
49 | struct tasklet_struct msg_dpc; | |
50 | struct tasklet_struct event_dpc; | |
3e7ee490 | 51 | |
454f18a9 | 52 | /* The bus root device */ |
f916a34d | 53 | struct vm_device device_ctx; |
3e7ee490 HJ |
54 | }; |
55 | ||
3e7ee490 HJ |
56 | static int vmbus_match(struct device *device, struct device_driver *driver); |
57 | static int vmbus_probe(struct device *device); | |
58 | static int vmbus_remove(struct device *device); | |
59 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 60 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 HJ |
61 | static void vmbus_msg_dpc(unsigned long data); |
62 | static void vmbus_event_dpc(unsigned long data); | |
63 | ||
90c9960e | 64 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
65 | |
66 | static void vmbus_device_release(struct device *device); | |
67 | static void vmbus_bus_release(struct device *device); | |
68 | ||
90c9960e GKH |
69 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
70 | struct hv_guid *instance, | |
71 | void *context); | |
3d3b5518 | 72 | static void vmbus_child_device_destroy(struct hv_device *device_obj); |
90c9960e GKH |
73 | static int vmbus_child_device_register(struct hv_device *root_device_obj, |
74 | struct hv_device *child_device_obj); | |
3d3b5518 | 75 | static void vmbus_child_device_unregister(struct hv_device *child_device_obj); |
90c9960e GKH |
76 | static void vmbus_child_device_get_info(struct hv_device *device_obj, |
77 | struct hv_device_info *device_info); | |
78 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
79 | struct device_attribute *dev_attr, | |
80 | char *buf); | |
3e7ee490 | 81 | |
3e7ee490 | 82 | |
90c9960e | 83 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 84 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
85 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
86 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
87 | |
88 | static int vmbus_irq = VMBUS_IRQ; | |
89 | ||
454f18a9 | 90 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
91 | static struct device_attribute vmbus_device_attrs[] = { |
92 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
93 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
94 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | ||
98 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
99 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
100 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
101 | ||
102 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | ||
106 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
107 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
108 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
109 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
110 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
111 | ||
112 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
113 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
114 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
115 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
116 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
117 | __ATTR_NULL | |
118 | }; | |
3e7ee490 | 119 | |
454f18a9 | 120 | /* The one and only one */ |
90c9960e GKH |
121 | static struct vmbus_driver_context g_vmbus_drv = { |
122 | .bus.name = "vmbus", | |
123 | .bus.match = vmbus_match, | |
124 | .bus.shutdown = vmbus_shutdown, | |
125 | .bus.remove = vmbus_remove, | |
126 | .bus.probe = vmbus_probe, | |
127 | .bus.uevent = vmbus_uevent, | |
128 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
129 | }; |
130 | ||
90c9960e GKH |
131 | /** |
132 | * vmbus_show_device_attr - Show the device attribute in sysfs. | |
133 | * | |
134 | * This is invoked when user does a | |
135 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
136 | */ | |
137 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
138 | struct device_attribute *dev_attr, | |
139 | char *buf) | |
3e7ee490 | 140 | { |
f916a34d | 141 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 142 | struct hv_device_info device_info; |
3e7ee490 | 143 | |
ee3d7ddf | 144 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 HJ |
145 | |
146 | vmbus_child_device_get_info(&device_ctx->device_obj, &device_info); | |
147 | ||
90c9960e GKH |
148 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
149 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
150 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
151 | device_info.ChannelType.data[3], | |
152 | device_info.ChannelType.data[2], | |
153 | device_info.ChannelType.data[1], | |
154 | device_info.ChannelType.data[0], | |
155 | device_info.ChannelType.data[5], | |
156 | device_info.ChannelType.data[4], | |
157 | device_info.ChannelType.data[7], | |
158 | device_info.ChannelType.data[6], | |
159 | device_info.ChannelType.data[8], | |
160 | device_info.ChannelType.data[9], | |
161 | device_info.ChannelType.data[10], | |
162 | device_info.ChannelType.data[11], | |
163 | device_info.ChannelType.data[12], | |
164 | device_info.ChannelType.data[13], | |
165 | device_info.ChannelType.data[14], | |
166 | device_info.ChannelType.data[15]); | |
167 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { | |
168 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
169 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
170 | device_info.ChannelInstance.data[3], | |
171 | device_info.ChannelInstance.data[2], | |
172 | device_info.ChannelInstance.data[1], | |
173 | device_info.ChannelInstance.data[0], | |
174 | device_info.ChannelInstance.data[5], | |
175 | device_info.ChannelInstance.data[4], | |
176 | device_info.ChannelInstance.data[7], | |
177 | device_info.ChannelInstance.data[6], | |
178 | device_info.ChannelInstance.data[8], | |
179 | device_info.ChannelInstance.data[9], | |
180 | device_info.ChannelInstance.data[10], | |
181 | device_info.ChannelInstance.data[11], | |
182 | device_info.ChannelInstance.data[12], | |
183 | device_info.ChannelInstance.data[13], | |
184 | device_info.ChannelInstance.data[14], | |
185 | device_info.ChannelInstance.data[15]); | |
186 | } else if (!strcmp(dev_attr->attr.name, "state")) { | |
3e7ee490 | 187 | return sprintf(buf, "%d\n", device_info.ChannelState); |
90c9960e | 188 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
3e7ee490 | 189 | return sprintf(buf, "%d\n", device_info.ChannelId); |
90c9960e | 190 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
3e7ee490 | 191 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
90c9960e | 192 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
3e7ee490 | 193 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
90c9960e | 194 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
3e7ee490 | 195 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
90c9960e GKH |
196 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
197 | return sprintf(buf, "%d\n", | |
198 | device_info.Outbound.BytesAvailToRead); | |
199 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { | |
200 | return sprintf(buf, "%d\n", | |
201 | device_info.Outbound.BytesAvailToWrite); | |
202 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { | |
3e7ee490 | 203 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
90c9960e | 204 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
3e7ee490 | 205 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
90c9960e | 206 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
3e7ee490 | 207 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
90c9960e GKH |
208 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
209 | return sprintf(buf, "%d\n", | |
210 | device_info.Inbound.BytesAvailToRead); | |
211 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { | |
212 | return sprintf(buf, "%d\n", | |
213 | device_info.Inbound.BytesAvailToWrite); | |
214 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { | |
3e7ee490 | 215 | return sprintf(buf, "%d\n", device_info.MonitorId); |
90c9960e | 216 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
3e7ee490 | 217 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
90c9960e | 218 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
3e7ee490 | 219 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
90c9960e GKH |
220 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
221 | return sprintf(buf, "%d\n", | |
222 | device_info.ServerMonitorConnectionId); | |
223 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { | |
3e7ee490 | 224 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
90c9960e | 225 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
3e7ee490 | 226 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
90c9960e GKH |
227 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
228 | return sprintf(buf, "%d\n", | |
229 | device_info.ClientMonitorConnectionId); | |
230 | } else { | |
3e7ee490 HJ |
231 | return 0; |
232 | } | |
233 | } | |
234 | ||
90c9960e GKH |
235 | /** |
236 | * vmbus_bus_init -Main vmbus driver initialization routine. | |
237 | * | |
238 | * Here, we | |
239 | * - initialize the vmbus driver context | |
240 | * - setup various driver entry points | |
241 | * - invoke the vmbus hv main init routine | |
242 | * - get the irq resource | |
243 | * - invoke the vmbus to add the vmbus root device | |
244 | * - setup the vmbus root device | |
245 | * - retrieve the channel offers | |
246 | */ | |
21707bed | 247 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
3e7ee490 | 248 | { |
90c9960e | 249 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
ee3d7ddf | 250 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
f916a34d | 251 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
90c9960e GKH |
252 | int ret; |
253 | unsigned int vector; | |
3e7ee490 HJ |
254 | |
255 | DPRINT_ENTER(VMBUS_DRV); | |
256 | ||
90c9960e GKH |
257 | /* |
258 | * Set this up to allow lower layer to callback to add/remove child | |
259 | * devices on the bus | |
260 | */ | |
3e7ee490 HJ |
261 | vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; |
262 | vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; | |
263 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; | |
264 | vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister; | |
265 | ||
454f18a9 | 266 | /* Call to bus driver to initialize */ |
21707bed | 267 | ret = drv_init(&vmbus_drv_obj->Base); |
90c9960e | 268 | if (ret != 0) { |
3e7ee490 HJ |
269 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); |
270 | goto cleanup; | |
271 | } | |
272 | ||
454f18a9 | 273 | /* Sanity checks */ |
90c9960e | 274 | if (!vmbus_drv_obj->Base.OnDeviceAdd) { |
3e7ee490 HJ |
275 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
276 | ret = -1; | |
277 | goto cleanup; | |
278 | } | |
279 | ||
280 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; | |
281 | ||
454f18a9 | 282 | /* Initialize the bus context */ |
90c9960e GKH |
283 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
284 | (unsigned long)vmbus_drv_obj); | |
285 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, | |
286 | (unsigned long)vmbus_drv_obj); | |
3e7ee490 | 287 | |
454f18a9 | 288 | /* Now, register the bus driver with LDM */ |
c19fbca3 | 289 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 290 | if (ret) { |
c19fbca3 BP |
291 | ret = -1; |
292 | goto cleanup; | |
293 | } | |
3e7ee490 | 294 | |
454f18a9 | 295 | /* Get the interrupt resource */ |
90c9960e GKH |
296 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
297 | vmbus_drv_obj->Base.name, NULL); | |
3e7ee490 | 298 | |
90c9960e GKH |
299 | if (ret != 0) { |
300 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
301 | vmbus_irq); | |
3e7ee490 HJ |
302 | |
303 | bus_unregister(&vmbus_drv_ctx->bus); | |
304 | ||
305 | ret = -1; | |
306 | goto cleanup; | |
307 | } | |
3e7ee490 | 308 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
309 | |
310 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
311 | ||
454f18a9 | 312 | /* Call to bus driver to add the root device */ |
f916a34d | 313 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
3e7ee490 HJ |
314 | |
315 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); | |
90c9960e GKH |
316 | if (ret != 0) { |
317 | DPRINT_ERR(VMBUS_DRV, | |
318 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
319 | |
320 | free_irq(vmbus_irq, NULL); | |
321 | ||
322 | bus_unregister(&vmbus_drv_ctx->bus); | |
323 | ||
324 | ret = -1; | |
325 | goto cleanup; | |
326 | } | |
454f18a9 | 327 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 328 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
90c9960e GKH |
329 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, |
330 | sizeof(struct hv_guid)); | |
331 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, | |
332 | sizeof(struct hv_guid)); | |
3e7ee490 | 333 | |
454f18a9 | 334 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 335 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
336 | /* NULL; vmbus_remove() does not get invoked */ |
337 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 338 | |
454f18a9 | 339 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
340 | dev_ctx->device.release = vmbus_bus_release; |
341 | ||
454f18a9 | 342 | /* Setup the bus as root device */ |
5d48a1c2 | 343 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
344 | if (ret) { |
345 | DPRINT_ERR(VMBUS_DRV, | |
346 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
347 | |
348 | free_irq(vmbus_irq, NULL); | |
349 | bus_unregister(&vmbus_drv_ctx->bus); | |
350 | ||
351 | ret = -1; | |
352 | goto cleanup; | |
353 | } | |
354 | ||
3e7ee490 HJ |
355 | |
356 | vmbus_drv_obj->GetChannelOffers(); | |
357 | ||
358 | cleanup: | |
359 | DPRINT_EXIT(VMBUS_DRV); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
90c9960e GKH |
364 | /** |
365 | * vmbus_bus_exit - Terminate the vmbus driver. | |
366 | * | |
367 | * This routine is opposite of vmbus_bus_init() | |
368 | */ | |
bd1de709 | 369 | static void vmbus_bus_exit(void) |
3e7ee490 | 370 | { |
ee3d7ddf | 371 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 372 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
3e7ee490 | 373 | |
f916a34d | 374 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
3e7ee490 HJ |
375 | |
376 | DPRINT_ENTER(VMBUS_DRV); | |
377 | ||
454f18a9 | 378 | /* Remove the root device */ |
3e7ee490 HJ |
379 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
380 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
381 | ||
382 | if (vmbus_drv_obj->Base.OnCleanup) | |
383 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
384 | ||
454f18a9 | 385 | /* Unregister the root bus device */ |
3e7ee490 HJ |
386 | device_unregister(&dev_ctx->device); |
387 | ||
388 | bus_unregister(&vmbus_drv_ctx->bus); | |
389 | ||
390 | free_irq(vmbus_irq, NULL); | |
391 | ||
392 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
393 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
394 | ||
395 | DPRINT_EXIT(VMBUS_DRV); | |
396 | ||
397 | return; | |
398 | } | |
399 | ||
90c9960e GKH |
400 | /** |
401 | * vmbus_child_driver_register - Register a vmbus's child driver | |
402 | */ | |
403 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 404 | { |
ee3d7ddf | 405 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 406 | int ret; |
3e7ee490 HJ |
407 | |
408 | DPRINT_ENTER(VMBUS_DRV); | |
409 | ||
90c9960e GKH |
410 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
411 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 412 | |
454f18a9 | 413 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
414 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
415 | ||
5d48a1c2 | 416 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
417 | |
418 | vmbus_drv_obj->GetChannelOffers(); | |
419 | ||
420 | DPRINT_EXIT(VMBUS_DRV); | |
5d48a1c2 BP |
421 | |
422 | return ret; | |
3e7ee490 | 423 | } |
3e7ee490 HJ |
424 | EXPORT_SYMBOL(vmbus_child_driver_register); |
425 | ||
90c9960e GKH |
426 | /** |
427 | * vmbus_child_driver_unregister Unregister a vmbus's child driver | |
428 | */ | |
429 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 HJ |
430 | { |
431 | DPRINT_ENTER(VMBUS_DRV); | |
432 | ||
90c9960e GKH |
433 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
434 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
435 | |
436 | driver_unregister(&driver_ctx->driver); | |
437 | ||
438 | driver_ctx->driver.bus = NULL; | |
439 | ||
440 | DPRINT_EXIT(VMBUS_DRV); | |
441 | } | |
3e7ee490 HJ |
442 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
443 | ||
90c9960e GKH |
444 | /** |
445 | * vmbus_get_interface - Get the vmbus channel interface. | |
446 | * | |
447 | * This is invoked by child/client driver that sits above vmbus | |
448 | */ | |
ee3d7ddf | 449 | void vmbus_get_interface(struct vmbus_channel_interface *interface) |
3e7ee490 | 450 | { |
ee3d7ddf | 451 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
452 | |
453 | vmbus_drv_obj->GetChannelInterface(interface); | |
454 | } | |
3e7ee490 HJ |
455 | EXPORT_SYMBOL(vmbus_get_interface); |
456 | ||
90c9960e GKH |
457 | /** |
458 | * vmbus_child_device_get_info - Get the vmbus child device info. | |
459 | * | |
460 | * This is invoked to display various device attributes in sysfs. | |
461 | */ | |
462 | static void vmbus_child_device_get_info(struct hv_device *device_obj, | |
463 | struct hv_device_info *device_info) | |
3e7ee490 | 464 | { |
ee3d7ddf | 465 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
466 | |
467 | vmbus_drv_obj->GetChannelInfo(device_obj, device_info); | |
468 | } | |
469 | ||
90c9960e GKH |
470 | /** |
471 | * vmbus_child_device_create - Creates and registers a new child device on the vmbus. | |
472 | */ | |
daaa8cc3 GKH |
473 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
474 | struct hv_guid *instance, | |
475 | void *context) | |
3e7ee490 | 476 | { |
f916a34d | 477 | struct vm_device *child_device_ctx; |
3d3b5518 | 478 | struct hv_device *child_device_obj; |
3e7ee490 HJ |
479 | |
480 | DPRINT_ENTER(VMBUS_DRV); | |
481 | ||
454f18a9 | 482 | /* Allocate the new child device */ |
f916a34d | 483 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
484 | if (!child_device_ctx) { |
485 | DPRINT_ERR(VMBUS_DRV, | |
486 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
487 | DPRINT_EXIT(VMBUS_DRV); |
488 | ||
489 | return NULL; | |
490 | } | |
491 | ||
492 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
493 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
494 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
495 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
496 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 497 | &child_device_ctx->device, |
daaa8cc3 GKH |
498 | type->data[3], type->data[2], type->data[1], type->data[0], |
499 | type->data[5], type->data[4], type->data[7], type->data[6], | |
500 | type->data[8], type->data[9], type->data[10], type->data[11], | |
501 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
502 | instance->data[3], instance->data[2], |
503 | instance->data[1], instance->data[0], | |
504 | instance->data[5], instance->data[4], | |
505 | instance->data[7], instance->data[6], | |
506 | instance->data[8], instance->data[9], | |
507 | instance->data[10], instance->data[11], | |
508 | instance->data[12], instance->data[13], | |
509 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
510 | |
511 | child_device_obj = &child_device_ctx->device_obj; | |
512 | child_device_obj->context = context; | |
9fb5cce4 MD |
513 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
514 | memcpy(&child_device_obj->deviceInstance, instance, | |
90c9960e | 515 | sizeof(struct hv_guid)); |
3e7ee490 | 516 | |
9fb5cce4 MD |
517 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
518 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 HJ |
519 | |
520 | DPRINT_EXIT(VMBUS_DRV); | |
521 | ||
522 | return child_device_obj; | |
523 | } | |
524 | ||
90c9960e GKH |
525 | /** |
526 | * vmbus_child_device_register - Register the child device on the specified bus | |
527 | */ | |
528 | static int vmbus_child_device_register(struct hv_device *root_device_obj, | |
529 | struct hv_device *child_device_obj) | |
3e7ee490 | 530 | { |
90c9960e | 531 | int ret = 0; |
f916a34d HZ |
532 | struct vm_device *root_device_ctx = |
533 | to_vm_device(root_device_obj); | |
534 | struct vm_device *child_device_ctx = | |
535 | to_vm_device(child_device_obj); | |
f4888417 | 536 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 HJ |
537 | |
538 | DPRINT_ENTER(VMBUS_DRV); | |
539 | ||
90c9960e GKH |
540 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
541 | child_device_ctx); | |
454f18a9 | 542 | |
1bb40a25 | 543 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
544 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
545 | atomic_inc_return(&device_num)); | |
3e7ee490 | 546 | |
454f18a9 BP |
547 | /* The new device belongs to this bus */ |
548 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
549 | child_device_ctx->device.parent = &root_device_ctx->device; |
550 | child_device_ctx->device.release = vmbus_device_release; | |
551 | ||
90c9960e GKH |
552 | /* |
553 | * Register with the LDM. This will kick off the driver/device | |
554 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
555 | */ | |
3e7ee490 HJ |
556 | ret = device_register(&child_device_ctx->device); |
557 | ||
454f18a9 | 558 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
559 | ret = child_device_ctx->probe_error; |
560 | ||
561 | if (ret) | |
90c9960e GKH |
562 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
563 | &child_device_ctx->device); | |
3e7ee490 | 564 | else |
90c9960e GKH |
565 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
566 | &child_device_ctx->device); | |
3e7ee490 | 567 | |
3e7ee490 HJ |
568 | DPRINT_EXIT(VMBUS_DRV); |
569 | ||
570 | return ret; | |
571 | } | |
572 | ||
90c9960e GKH |
573 | /** |
574 | * vmbus_child_device_unregister - Remove the specified child device from the vmbus. | |
575 | */ | |
3d3b5518 | 576 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 577 | { |
f916a34d | 578 | struct vm_device *device_ctx = to_vm_device(device_obj); |
3e7ee490 HJ |
579 | |
580 | DPRINT_ENTER(VMBUS_DRV); | |
581 | ||
90c9960e GKH |
582 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
583 | &device_ctx->device); | |
3e7ee490 | 584 | |
90c9960e GKH |
585 | /* |
586 | * Kick off the process of unregistering the device. | |
587 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
588 | */ | |
3e7ee490 HJ |
589 | device_unregister(&device_ctx->device); |
590 | ||
90c9960e GKH |
591 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
592 | &device_ctx->device); | |
3e7ee490 HJ |
593 | |
594 | DPRINT_EXIT(VMBUS_DRV); | |
595 | } | |
596 | ||
90c9960e GKH |
597 | /** |
598 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. | |
599 | */ | |
3d3b5518 | 600 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
3e7ee490 HJ |
601 | { |
602 | DPRINT_ENTER(VMBUS_DRV); | |
603 | ||
604 | DPRINT_EXIT(VMBUS_DRV); | |
605 | } | |
606 | ||
90c9960e GKH |
607 | /** |
608 | * vmbus_uevent - add uevent for our device | |
609 | * | |
610 | * This routine is invoked when a device is added or removed on the vmbus to | |
611 | * generate a uevent to udev in the userspace. The udev will then look at its | |
612 | * rule and the uevent generated here to load the appropriate driver | |
613 | */ | |
3e7ee490 HJ |
614 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
615 | { | |
f916a34d | 616 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
617 | int ret; |
618 | ||
619 | DPRINT_ENTER(VMBUS_DRV); | |
620 | ||
90c9960e GKH |
621 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
622 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
623 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
624 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
625 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
626 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
627 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
628 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
629 | device_ctx->class_id.data[10], | |
630 | device_ctx->class_id.data[11], | |
631 | device_ctx->class_id.data[12], | |
632 | device_ctx->class_id.data[13], | |
633 | device_ctx->class_id.data[14], | |
634 | device_ctx->class_id.data[15]); | |
3e7ee490 | 635 | |
90c9960e GKH |
636 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
637 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
638 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
639 | device_ctx->class_id.data[3], | |
640 | device_ctx->class_id.data[2], | |
641 | device_ctx->class_id.data[1], | |
642 | device_ctx->class_id.data[0], | |
643 | device_ctx->class_id.data[5], | |
644 | device_ctx->class_id.data[4], | |
645 | device_ctx->class_id.data[7], | |
646 | device_ctx->class_id.data[6], | |
647 | device_ctx->class_id.data[8], | |
648 | device_ctx->class_id.data[9], | |
649 | device_ctx->class_id.data[10], | |
650 | device_ctx->class_id.data[11], | |
651 | device_ctx->class_id.data[12], | |
652 | device_ctx->class_id.data[13], | |
653 | device_ctx->class_id.data[14], | |
654 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
655 | |
656 | if (ret) | |
3e7ee490 | 657 | return ret; |
3e7ee490 | 658 | |
90c9960e GKH |
659 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
660 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
661 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
662 | device_ctx->device_id.data[3], | |
663 | device_ctx->device_id.data[2], | |
664 | device_ctx->device_id.data[1], | |
665 | device_ctx->device_id.data[0], | |
666 | device_ctx->device_id.data[5], | |
667 | device_ctx->device_id.data[4], | |
668 | device_ctx->device_id.data[7], | |
669 | device_ctx->device_id.data[6], | |
670 | device_ctx->device_id.data[8], | |
671 | device_ctx->device_id.data[9], | |
672 | device_ctx->device_id.data[10], | |
673 | device_ctx->device_id.data[11], | |
674 | device_ctx->device_id.data[12], | |
675 | device_ctx->device_id.data[13], | |
676 | device_ctx->device_id.data[14], | |
677 | device_ctx->device_id.data[15]); | |
3e7ee490 | 678 | if (ret) |
3e7ee490 | 679 | return ret; |
3e7ee490 | 680 | |
3e7ee490 HJ |
681 | DPRINT_EXIT(VMBUS_DRV); |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
90c9960e GKH |
686 | /** |
687 | * vmbus_match - Attempt to match the specified device to the specified driver | |
688 | */ | |
3e7ee490 HJ |
689 | static int vmbus_match(struct device *device, struct device_driver *driver) |
690 | { | |
90c9960e | 691 | int match = 0; |
3e7ee490 | 692 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 693 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
694 | |
695 | DPRINT_ENTER(VMBUS_DRV); | |
696 | ||
454f18a9 | 697 | /* We found our driver ? */ |
90c9960e GKH |
698 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
699 | sizeof(struct hv_guid)) == 0) { | |
700 | /* | |
701 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
702 | * it here to access the struct hv_driver field | |
703 | */ | |
704 | struct vmbus_driver_context *vmbus_drv_ctx = | |
705 | (struct vmbus_driver_context *)driver_ctx; | |
706 | ||
3e7ee490 | 707 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
90c9960e GKH |
708 | DPRINT_INFO(VMBUS_DRV, |
709 | "device object (%p) set to driver object (%p)", | |
710 | &device_ctx->device_obj, | |
711 | device_ctx->device_obj.Driver); | |
3e7ee490 HJ |
712 | |
713 | match = 1; | |
714 | } | |
715 | ||
716 | DPRINT_EXIT(VMBUS_DRV); | |
717 | ||
718 | return match; | |
719 | } | |
720 | ||
90c9960e GKH |
721 | /** |
722 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() | |
723 | * | |
724 | * We need a callback because we cannot invoked device_unregister() inside | |
725 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
726 | * i.e. we cannot call device_unregister() inside device_register() | |
727 | */ | |
3e7ee490 | 728 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 729 | { |
f916a34d | 730 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 HJ |
731 | |
732 | DPRINT_ENTER(VMBUS_DRV); | |
733 | ||
90c9960e GKH |
734 | /* |
735 | * Kick off the process of unregistering the device. | |
736 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
737 | */ | |
3e7ee490 HJ |
738 | device_unregister(&device_ctx->device); |
739 | ||
454f18a9 | 740 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
741 | DPRINT_EXIT(VMBUS_DRV); |
742 | } | |
743 | ||
90c9960e GKH |
744 | /** |
745 | * vmbus_probe - Add the new vmbus's child device | |
746 | */ | |
3e7ee490 HJ |
747 | static int vmbus_probe(struct device *child_device) |
748 | { | |
90c9960e GKH |
749 | int ret = 0; |
750 | struct driver_context *driver_ctx = | |
751 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
752 | struct vm_device *device_ctx = |
753 | device_to_vm_device(child_device); | |
3e7ee490 HJ |
754 | |
755 | DPRINT_ENTER(VMBUS_DRV); | |
756 | ||
454f18a9 | 757 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 758 | if (driver_ctx->probe) { |
3e7ee490 | 759 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
760 | if (ret != 0) { |
761 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
762 | "(%p) on driver %s (%d)...", | |
763 | dev_name(child_device), child_device, | |
764 | child_device->driver->name, ret); | |
765 | ||
766 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
767 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
768 | schedule_work(&device_ctx->probe_failed_work_item); |
769 | } | |
90c9960e GKH |
770 | } else { |
771 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
772 | child_device->driver->name); | |
3e7ee490 HJ |
773 | ret = -1; |
774 | } | |
775 | ||
776 | DPRINT_EXIT(VMBUS_DRV); | |
777 | return ret; | |
778 | } | |
779 | ||
90c9960e GKH |
780 | /** |
781 | * vmbus_remove - Remove a vmbus device | |
782 | */ | |
3e7ee490 HJ |
783 | static int vmbus_remove(struct device *child_device) |
784 | { | |
90c9960e | 785 | int ret; |
3e7ee490 HJ |
786 | struct driver_context *driver_ctx; |
787 | ||
788 | DPRINT_ENTER(VMBUS_DRV); | |
789 | ||
454f18a9 | 790 | /* Special case root bus device */ |
90c9960e GKH |
791 | if (child_device->parent == NULL) { |
792 | /* | |
793 | * No-op since it is statically defined and handle in | |
794 | * vmbus_bus_exit() | |
795 | */ | |
3e7ee490 HJ |
796 | DPRINT_EXIT(VMBUS_DRV); |
797 | return 0; | |
798 | } | |
799 | ||
90c9960e | 800 | if (child_device->driver) { |
3e7ee490 HJ |
801 | driver_ctx = driver_to_driver_context(child_device->driver); |
802 | ||
90c9960e GKH |
803 | /* |
804 | * Let the specific open-source driver handles the removal if | |
805 | * it can | |
806 | */ | |
807 | if (driver_ctx->remove) { | |
3e7ee490 | 808 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
809 | } else { |
810 | DPRINT_ERR(VMBUS_DRV, | |
811 | "remove() method not set for driver - %s", | |
812 | child_device->driver->name); | |
3e7ee490 HJ |
813 | ret = -1; |
814 | } | |
815 | } | |
3e7ee490 HJ |
816 | |
817 | DPRINT_EXIT(VMBUS_DRV); | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
90c9960e GKH |
822 | /** |
823 | * vmbus_shutdown - Shutdown a vmbus device | |
824 | */ | |
3e7ee490 HJ |
825 | static void vmbus_shutdown(struct device *child_device) |
826 | { | |
827 | struct driver_context *driver_ctx; | |
828 | ||
829 | DPRINT_ENTER(VMBUS_DRV); | |
830 | ||
454f18a9 | 831 | /* Special case root bus device */ |
90c9960e GKH |
832 | if (child_device->parent == NULL) { |
833 | /* | |
834 | * No-op since it is statically defined and handle in | |
835 | * vmbus_bus_exit() | |
836 | */ | |
3e7ee490 HJ |
837 | DPRINT_EXIT(VMBUS_DRV); |
838 | return; | |
839 | } | |
840 | ||
454f18a9 | 841 | /* The device may not be attached yet */ |
90c9960e | 842 | if (!child_device->driver) { |
3e7ee490 HJ |
843 | DPRINT_EXIT(VMBUS_DRV); |
844 | return; | |
845 | } | |
846 | ||
847 | driver_ctx = driver_to_driver_context(child_device->driver); | |
848 | ||
454f18a9 | 849 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 850 | if (driver_ctx->shutdown) |
3e7ee490 | 851 | driver_ctx->shutdown(child_device); |
3e7ee490 HJ |
852 | |
853 | DPRINT_EXIT(VMBUS_DRV); | |
854 | ||
855 | return; | |
856 | } | |
857 | ||
90c9960e GKH |
858 | /** |
859 | * vmbus_bus_release - Final callback release of the vmbus root device | |
860 | */ | |
3e7ee490 HJ |
861 | static void vmbus_bus_release(struct device *device) |
862 | { | |
863 | DPRINT_ENTER(VMBUS_DRV); | |
689bf406 GKH |
864 | /* FIXME */ |
865 | /* Empty release functions are a bug, or a major sign | |
866 | * of a problem design, this MUST BE FIXED! */ | |
867 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
868 | WARN_ON(1); | |
3e7ee490 HJ |
869 | DPRINT_EXIT(VMBUS_DRV); |
870 | } | |
871 | ||
90c9960e GKH |
872 | /** |
873 | * vmbus_device_release - Final callback release of the vmbus child device | |
874 | */ | |
3e7ee490 HJ |
875 | static void vmbus_device_release(struct device *device) |
876 | { | |
f916a34d | 877 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
878 | |
879 | DPRINT_ENTER(VMBUS_DRV); | |
880 | ||
454f18a9 | 881 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
3e7ee490 HJ |
882 | kfree(device_ctx); |
883 | ||
454f18a9 | 884 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
885 | DPRINT_EXIT(VMBUS_DRV); |
886 | ||
887 | return; | |
888 | } | |
889 | ||
90c9960e GKH |
890 | /** |
891 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages | |
892 | */ | |
3e7ee490 HJ |
893 | static void vmbus_msg_dpc(unsigned long data) |
894 | { | |
ee3d7ddf | 895 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 HJ |
896 | |
897 | DPRINT_ENTER(VMBUS_DRV); | |
898 | ||
899 | ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); | |
900 | ||
454f18a9 | 901 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
902 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
903 | ||
904 | DPRINT_EXIT(VMBUS_DRV); | |
905 | } | |
906 | ||
90c9960e GKH |
907 | /** |
908 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events | |
909 | */ | |
3e7ee490 HJ |
910 | static void vmbus_event_dpc(unsigned long data) |
911 | { | |
ee3d7ddf | 912 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 HJ |
913 | |
914 | DPRINT_ENTER(VMBUS_DRV); | |
915 | ||
916 | ASSERT(vmbus_drv_obj->OnEventDpc != NULL); | |
917 | ||
454f18a9 | 918 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
919 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
920 | ||
921 | DPRINT_EXIT(VMBUS_DRV); | |
922 | } | |
923 | ||
90c9960e | 924 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 925 | { |
ee3d7ddf | 926 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 927 | int ret; |
3e7ee490 HJ |
928 | |
929 | DPRINT_ENTER(VMBUS_DRV); | |
930 | ||
931 | ASSERT(vmbus_driver_obj->OnIsr != NULL); | |
932 | ||
454f18a9 | 933 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
934 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
935 | ||
454f18a9 | 936 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
937 | if (ret > 0) { |
938 | if (test_bit(0, (unsigned long *)&ret)) | |
3e7ee490 | 939 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
3e7ee490 | 940 | |
90c9960e | 941 | if (test_bit(1, (unsigned long *)&ret)) |
3e7ee490 | 942 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
3e7ee490 HJ |
943 | |
944 | DPRINT_EXIT(VMBUS_DRV); | |
945 | return IRQ_HANDLED; | |
90c9960e | 946 | } else { |
3e7ee490 HJ |
947 | DPRINT_EXIT(VMBUS_DRV); |
948 | return IRQ_NONE; | |
949 | } | |
950 | } | |
951 | ||
c22090fa GKH |
952 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
953 | { | |
954 | .ident = "Hyper-V", | |
955 | .matches = { | |
956 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
957 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
958 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
959 | }, | |
960 | }, | |
961 | { }, | |
962 | }; | |
963 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
964 | ||
3e7ee490 HJ |
965 | static int __init vmbus_init(void) |
966 | { | |
90c9960e | 967 | int ret = 0; |
3e7ee490 HJ |
968 | |
969 | DPRINT_ENTER(VMBUS_DRV); | |
970 | ||
971 | DPRINT_INFO(VMBUS_DRV, | |
972 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
973 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 974 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 975 | |
c22090fa GKH |
976 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
977 | return -ENODEV; | |
978 | ||
3e7ee490 HJ |
979 | ret = vmbus_bus_init(VmbusInitialize); |
980 | ||
981 | DPRINT_EXIT(VMBUS_DRV); | |
982 | return ret; | |
983 | } | |
984 | ||
3e7ee490 HJ |
985 | static void __exit vmbus_exit(void) |
986 | { | |
987 | DPRINT_ENTER(VMBUS_DRV); | |
988 | ||
989 | vmbus_bus_exit(); | |
90c9960e | 990 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 991 | DPRINT_EXIT(VMBUS_DRV); |
3e7ee490 HJ |
992 | return; |
993 | } | |
994 | ||
9a775dbd GKH |
995 | /* |
996 | * We use a PCI table to determine if we should autoload this driver This is | |
997 | * needed by distro tools to determine if the hyperv drivers should be | |
998 | * installed and/or configured. We don't do anything else with the table, but | |
999 | * it needs to be present. | |
9a775dbd GKH |
1000 | */ |
1001 | const static struct pci_device_id microsoft_hv_pci_table[] = { | |
1002 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ | |
1003 | { 0 } | |
1004 | }; | |
1005 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1006 | ||
90c9960e | 1007 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1008 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1009 | module_param(vmbus_irq, int, S_IRUGO); |
1010 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1011 | |
1012 | module_init(vmbus_init); | |
1013 | module_exit(vmbus_exit); |