Commit | Line | Data |
---|---|---|
3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
3e7ee490 HJ |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/irq.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/sysctl.h> | |
9a775dbd | 27 | #include <linux/pci.h> |
c22090fa | 28 | #include <linux/dmi.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
8b5d6d3b | 30 | #include <linux/completion.h> |
2d82f6c7 | 31 | #include "version_info.h" |
4983b39a | 32 | #include "osd.h" |
645954c5 | 33 | #include "logging.h" |
870cde80 | 34 | #include "vmbus.h" |
3e7ee490 | 35 | |
3e7ee490 | 36 | |
454f18a9 | 37 | /* FIXME! We need to do this dynamically for PIC and APIC system */ |
90c9960e GKH |
38 | #define VMBUS_IRQ 0x5 |
39 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR | |
454f18a9 BP |
40 | |
41 | /* Main vmbus driver data structure */ | |
3e7ee490 | 42 | struct vmbus_driver_context { |
454f18a9 | 43 | /* !! These must be the first 2 fields !! */ |
90c9960e | 44 | /* FIXME, this is a bug */ |
454f18a9 BP |
45 | /* The driver field is not used in here. Instead, the bus field is */ |
46 | /* used to represent the driver */ | |
90c9960e | 47 | struct driver_context drv_ctx; |
ee3d7ddf | 48 | struct vmbus_driver drv_obj; |
3e7ee490 | 49 | |
90c9960e GKH |
50 | struct bus_type bus; |
51 | struct tasklet_struct msg_dpc; | |
52 | struct tasklet_struct event_dpc; | |
3e7ee490 | 53 | |
454f18a9 | 54 | /* The bus root device */ |
f916a34d | 55 | struct vm_device device_ctx; |
3e7ee490 HJ |
56 | }; |
57 | ||
3e7ee490 HJ |
58 | static int vmbus_match(struct device *device, struct device_driver *driver); |
59 | static int vmbus_probe(struct device *device); | |
60 | static int vmbus_remove(struct device *device); | |
61 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 62 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 HJ |
63 | static void vmbus_msg_dpc(unsigned long data); |
64 | static void vmbus_event_dpc(unsigned long data); | |
65 | ||
90c9960e | 66 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
67 | |
68 | static void vmbus_device_release(struct device *device); | |
69 | static void vmbus_bus_release(struct device *device); | |
70 | ||
90c9960e GKH |
71 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
72 | struct hv_guid *instance, | |
73 | void *context); | |
3d3b5518 | 74 | static void vmbus_child_device_destroy(struct hv_device *device_obj); |
90c9960e GKH |
75 | static int vmbus_child_device_register(struct hv_device *root_device_obj, |
76 | struct hv_device *child_device_obj); | |
3d3b5518 | 77 | static void vmbus_child_device_unregister(struct hv_device *child_device_obj); |
90c9960e GKH |
78 | static void vmbus_child_device_get_info(struct hv_device *device_obj, |
79 | struct hv_device_info *device_info); | |
80 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
81 | struct device_attribute *dev_attr, | |
82 | char *buf); | |
3e7ee490 | 83 | |
3e7ee490 | 84 | |
90c9960e | 85 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 86 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
87 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
88 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
89 | |
90 | static int vmbus_irq = VMBUS_IRQ; | |
91 | ||
454f18a9 | 92 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
93 | static struct device_attribute vmbus_device_attrs[] = { |
94 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
98 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
99 | ||
100 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
101 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
102 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | ||
104 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
106 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
107 | ||
108 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
109 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
110 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
111 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
112 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
113 | ||
114 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
115 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
116 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
117 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
118 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
119 | __ATTR_NULL | |
120 | }; | |
3e7ee490 | 121 | |
454f18a9 | 122 | /* The one and only one */ |
90c9960e GKH |
123 | static struct vmbus_driver_context g_vmbus_drv = { |
124 | .bus.name = "vmbus", | |
125 | .bus.match = vmbus_match, | |
126 | .bus.shutdown = vmbus_shutdown, | |
127 | .bus.remove = vmbus_remove, | |
128 | .bus.probe = vmbus_probe, | |
129 | .bus.uevent = vmbus_uevent, | |
130 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
131 | }; |
132 | ||
3e189519 | 133 | /* |
90c9960e GKH |
134 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
135 | * | |
136 | * This is invoked when user does a | |
137 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
138 | */ | |
139 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
140 | struct device_attribute *dev_attr, | |
141 | char *buf) | |
3e7ee490 | 142 | { |
f916a34d | 143 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 144 | struct hv_device_info device_info; |
3e7ee490 | 145 | |
ee3d7ddf | 146 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 HJ |
147 | |
148 | vmbus_child_device_get_info(&device_ctx->device_obj, &device_info); | |
149 | ||
90c9960e GKH |
150 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
151 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
152 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
153 | device_info.ChannelType.data[3], | |
154 | device_info.ChannelType.data[2], | |
155 | device_info.ChannelType.data[1], | |
156 | device_info.ChannelType.data[0], | |
157 | device_info.ChannelType.data[5], | |
158 | device_info.ChannelType.data[4], | |
159 | device_info.ChannelType.data[7], | |
160 | device_info.ChannelType.data[6], | |
161 | device_info.ChannelType.data[8], | |
162 | device_info.ChannelType.data[9], | |
163 | device_info.ChannelType.data[10], | |
164 | device_info.ChannelType.data[11], | |
165 | device_info.ChannelType.data[12], | |
166 | device_info.ChannelType.data[13], | |
167 | device_info.ChannelType.data[14], | |
168 | device_info.ChannelType.data[15]); | |
169 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { | |
170 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
171 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
172 | device_info.ChannelInstance.data[3], | |
173 | device_info.ChannelInstance.data[2], | |
174 | device_info.ChannelInstance.data[1], | |
175 | device_info.ChannelInstance.data[0], | |
176 | device_info.ChannelInstance.data[5], | |
177 | device_info.ChannelInstance.data[4], | |
178 | device_info.ChannelInstance.data[7], | |
179 | device_info.ChannelInstance.data[6], | |
180 | device_info.ChannelInstance.data[8], | |
181 | device_info.ChannelInstance.data[9], | |
182 | device_info.ChannelInstance.data[10], | |
183 | device_info.ChannelInstance.data[11], | |
184 | device_info.ChannelInstance.data[12], | |
185 | device_info.ChannelInstance.data[13], | |
186 | device_info.ChannelInstance.data[14], | |
187 | device_info.ChannelInstance.data[15]); | |
188 | } else if (!strcmp(dev_attr->attr.name, "state")) { | |
3e7ee490 | 189 | return sprintf(buf, "%d\n", device_info.ChannelState); |
90c9960e | 190 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
3e7ee490 | 191 | return sprintf(buf, "%d\n", device_info.ChannelId); |
90c9960e | 192 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
3e7ee490 | 193 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
90c9960e | 194 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
3e7ee490 | 195 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
90c9960e | 196 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
3e7ee490 | 197 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
90c9960e GKH |
198 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
199 | return sprintf(buf, "%d\n", | |
200 | device_info.Outbound.BytesAvailToRead); | |
201 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { | |
202 | return sprintf(buf, "%d\n", | |
203 | device_info.Outbound.BytesAvailToWrite); | |
204 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { | |
3e7ee490 | 205 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
90c9960e | 206 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
3e7ee490 | 207 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
90c9960e | 208 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
3e7ee490 | 209 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
90c9960e GKH |
210 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
211 | return sprintf(buf, "%d\n", | |
212 | device_info.Inbound.BytesAvailToRead); | |
213 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { | |
214 | return sprintf(buf, "%d\n", | |
215 | device_info.Inbound.BytesAvailToWrite); | |
216 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { | |
3e7ee490 | 217 | return sprintf(buf, "%d\n", device_info.MonitorId); |
90c9960e | 218 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
3e7ee490 | 219 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
90c9960e | 220 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
3e7ee490 | 221 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
90c9960e GKH |
222 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
223 | return sprintf(buf, "%d\n", | |
224 | device_info.ServerMonitorConnectionId); | |
225 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { | |
3e7ee490 | 226 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
90c9960e | 227 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
3e7ee490 | 228 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
90c9960e GKH |
229 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
230 | return sprintf(buf, "%d\n", | |
231 | device_info.ClientMonitorConnectionId); | |
232 | } else { | |
3e7ee490 HJ |
233 | return 0; |
234 | } | |
235 | } | |
236 | ||
3e189519 | 237 | /* |
90c9960e GKH |
238 | * vmbus_bus_init -Main vmbus driver initialization routine. |
239 | * | |
240 | * Here, we | |
0686e4f4 LL |
241 | * - initialize the vmbus driver context |
242 | * - setup various driver entry points | |
243 | * - invoke the vmbus hv main init routine | |
244 | * - get the irq resource | |
245 | * - invoke the vmbus to add the vmbus root device | |
246 | * - setup the vmbus root device | |
247 | * - retrieve the channel offers | |
90c9960e | 248 | */ |
21707bed | 249 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
3e7ee490 | 250 | { |
90c9960e | 251 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
ee3d7ddf | 252 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
f916a34d | 253 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
90c9960e GKH |
254 | int ret; |
255 | unsigned int vector; | |
3e7ee490 | 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 | ||
8b5d6d3b HZ |
358 | wait_for_completion(&hv_channel_ready); |
359 | ||
3e7ee490 | 360 | cleanup: |
3e7ee490 HJ |
361 | return ret; |
362 | } | |
363 | ||
3e189519 | 364 | /* |
90c9960e GKH |
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 | 375 | |
454f18a9 | 376 | /* Remove the root device */ |
3e7ee490 HJ |
377 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
378 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); | |
379 | ||
380 | if (vmbus_drv_obj->Base.OnCleanup) | |
381 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); | |
382 | ||
454f18a9 | 383 | /* Unregister the root bus device */ |
3e7ee490 HJ |
384 | device_unregister(&dev_ctx->device); |
385 | ||
386 | bus_unregister(&vmbus_drv_ctx->bus); | |
387 | ||
388 | free_irq(vmbus_irq, NULL); | |
389 | ||
390 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
391 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
392 | } |
393 | ||
3e189519 | 394 | |
90c9960e | 395 | /** |
3e189519 HJ |
396 | * vmbus_child_driver_register() - Register a vmbus's child driver |
397 | * @driver_ctx: Pointer to driver structure you want to register | |
398 | * | |
399 | * @driver_ctx is of type &struct driver_context | |
400 | * | |
401 | * Registers the given driver with Linux through the 'driver_register()' call | |
402 | * And sets up the hyper-v vmbus handling for this driver. | |
403 | * It will return the state of the 'driver_register()' call. | |
404 | * | |
405 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
406 | */ |
407 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 408 | { |
ee3d7ddf | 409 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
5d48a1c2 | 410 | int ret; |
3e7ee490 | 411 | |
90c9960e GKH |
412 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
413 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 414 | |
454f18a9 | 415 | /* The child driver on this vmbus */ |
3e7ee490 HJ |
416 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
417 | ||
5d48a1c2 | 418 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 HJ |
419 | |
420 | vmbus_drv_obj->GetChannelOffers(); | |
421 | ||
5d48a1c2 | 422 | return ret; |
3e7ee490 | 423 | } |
3e7ee490 HJ |
424 | EXPORT_SYMBOL(vmbus_child_driver_register); |
425 | ||
90c9960e | 426 | /** |
3e189519 HJ |
427 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
428 | * @driver_ctx: Pointer to driver structure you want to un-register | |
429 | * | |
430 | * @driver_ctx is of type &struct driver_context | |
431 | * | |
432 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
433 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
434 | * | |
435 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
436 | */ |
437 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 | 438 | { |
90c9960e GKH |
439 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
440 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
441 | |
442 | driver_unregister(&driver_ctx->driver); | |
443 | ||
444 | driver_ctx->driver.bus = NULL; | |
3e7ee490 | 445 | } |
3e7ee490 HJ |
446 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
447 | ||
90c9960e | 448 | /** |
3e189519 HJ |
449 | * vmbus_get_interface() - Get the vmbus channel interface. |
450 | * @interface: Pointer to channel interface structure | |
451 | * | |
452 | * Get the Hyper-V channel used for the driver. | |
453 | * | |
454 | * @interface is of type &struct vmbus_channel_interface | |
455 | * This is invoked by child/client driver that sits above vmbus. | |
90c9960e | 456 | * |
3e189519 | 457 | * Mainly used by Hyper-V drivers. |
90c9960e | 458 | */ |
ee3d7ddf | 459 | void vmbus_get_interface(struct vmbus_channel_interface *interface) |
3e7ee490 | 460 | { |
ee3d7ddf | 461 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
462 | |
463 | vmbus_drv_obj->GetChannelInterface(interface); | |
464 | } | |
3e7ee490 HJ |
465 | EXPORT_SYMBOL(vmbus_get_interface); |
466 | ||
3e189519 | 467 | /* |
90c9960e GKH |
468 | * vmbus_child_device_get_info - Get the vmbus child device info. |
469 | * | |
470 | * This is invoked to display various device attributes in sysfs. | |
471 | */ | |
472 | static void vmbus_child_device_get_info(struct hv_device *device_obj, | |
473 | struct hv_device_info *device_info) | |
3e7ee490 | 474 | { |
ee3d7ddf | 475 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
3e7ee490 HJ |
476 | |
477 | vmbus_drv_obj->GetChannelInfo(device_obj, device_info); | |
478 | } | |
479 | ||
3e189519 HJ |
480 | /* |
481 | * vmbus_child_device_create - Creates and registers a new child device | |
482 | * on the vmbus. | |
90c9960e | 483 | */ |
daaa8cc3 GKH |
484 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
485 | struct hv_guid *instance, | |
486 | void *context) | |
3e7ee490 | 487 | { |
f916a34d | 488 | struct vm_device *child_device_ctx; |
3d3b5518 | 489 | struct hv_device *child_device_obj; |
3e7ee490 | 490 | |
454f18a9 | 491 | /* Allocate the new child device */ |
f916a34d | 492 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
493 | if (!child_device_ctx) { |
494 | DPRINT_ERR(VMBUS_DRV, | |
495 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
496 | return NULL; |
497 | } | |
498 | ||
499 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
500 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
501 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
502 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
503 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 504 | &child_device_ctx->device, |
daaa8cc3 GKH |
505 | type->data[3], type->data[2], type->data[1], type->data[0], |
506 | type->data[5], type->data[4], type->data[7], type->data[6], | |
507 | type->data[8], type->data[9], type->data[10], type->data[11], | |
508 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
509 | instance->data[3], instance->data[2], |
510 | instance->data[1], instance->data[0], | |
511 | instance->data[5], instance->data[4], | |
512 | instance->data[7], instance->data[6], | |
513 | instance->data[8], instance->data[9], | |
514 | instance->data[10], instance->data[11], | |
515 | instance->data[12], instance->data[13], | |
516 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
517 | |
518 | child_device_obj = &child_device_ctx->device_obj; | |
519 | child_device_obj->context = context; | |
9fb5cce4 MD |
520 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
521 | memcpy(&child_device_obj->deviceInstance, instance, | |
90c9960e | 522 | sizeof(struct hv_guid)); |
3e7ee490 | 523 | |
9fb5cce4 MD |
524 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
525 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 | 526 | |
3e7ee490 HJ |
527 | return child_device_obj; |
528 | } | |
529 | ||
3e189519 | 530 | /* |
90c9960e GKH |
531 | * vmbus_child_device_register - Register the child device on the specified bus |
532 | */ | |
533 | static int vmbus_child_device_register(struct hv_device *root_device_obj, | |
534 | struct hv_device *child_device_obj) | |
3e7ee490 | 535 | { |
90c9960e | 536 | int ret = 0; |
f916a34d HZ |
537 | struct vm_device *root_device_ctx = |
538 | to_vm_device(root_device_obj); | |
539 | struct vm_device *child_device_ctx = | |
540 | to_vm_device(child_device_obj); | |
f4888417 | 541 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 542 | |
90c9960e GKH |
543 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
544 | child_device_ctx); | |
454f18a9 | 545 | |
1bb40a25 | 546 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
547 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
548 | atomic_inc_return(&device_num)); | |
3e7ee490 | 549 | |
454f18a9 BP |
550 | /* The new device belongs to this bus */ |
551 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ | |
3e7ee490 HJ |
552 | child_device_ctx->device.parent = &root_device_ctx->device; |
553 | child_device_ctx->device.release = vmbus_device_release; | |
554 | ||
90c9960e GKH |
555 | /* |
556 | * Register with the LDM. This will kick off the driver/device | |
557 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
558 | */ | |
3e7ee490 HJ |
559 | ret = device_register(&child_device_ctx->device); |
560 | ||
454f18a9 | 561 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
562 | ret = child_device_ctx->probe_error; |
563 | ||
564 | if (ret) | |
90c9960e GKH |
565 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
566 | &child_device_ctx->device); | |
3e7ee490 | 567 | else |
90c9960e GKH |
568 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
569 | &child_device_ctx->device); | |
3e7ee490 | 570 | |
3e7ee490 HJ |
571 | return ret; |
572 | } | |
573 | ||
3e189519 HJ |
574 | /* |
575 | * vmbus_child_device_unregister - Remove the specified child device | |
576 | * from the vmbus. | |
90c9960e | 577 | */ |
3d3b5518 | 578 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 579 | { |
f916a34d | 580 | struct vm_device *device_ctx = to_vm_device(device_obj); |
3e7ee490 | 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 | ||
3e189519 | 595 | /* |
90c9960e GKH |
596 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. |
597 | */ | |
3d3b5518 | 598 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
3e7ee490 | 599 | { |
3e7ee490 HJ |
600 | } |
601 | ||
3e189519 | 602 | /* |
90c9960e GKH |
603 | * vmbus_uevent - add uevent for our device |
604 | * | |
605 | * This routine is invoked when a device is added or removed on the vmbus to | |
606 | * generate a uevent to udev in the userspace. The udev will then look at its | |
607 | * rule and the uevent generated here to load the appropriate driver | |
608 | */ | |
3e7ee490 HJ |
609 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
610 | { | |
f916a34d | 611 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
612 | int ret; |
613 | ||
90c9960e GKH |
614 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
615 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
616 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
617 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
618 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
619 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
620 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
621 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
622 | device_ctx->class_id.data[10], | |
623 | device_ctx->class_id.data[11], | |
624 | device_ctx->class_id.data[12], | |
625 | device_ctx->class_id.data[13], | |
626 | device_ctx->class_id.data[14], | |
627 | device_ctx->class_id.data[15]); | |
3e7ee490 | 628 | |
90c9960e GKH |
629 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
630 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
631 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
632 | device_ctx->class_id.data[3], | |
633 | device_ctx->class_id.data[2], | |
634 | device_ctx->class_id.data[1], | |
635 | device_ctx->class_id.data[0], | |
636 | device_ctx->class_id.data[5], | |
637 | device_ctx->class_id.data[4], | |
638 | device_ctx->class_id.data[7], | |
639 | device_ctx->class_id.data[6], | |
640 | device_ctx->class_id.data[8], | |
641 | device_ctx->class_id.data[9], | |
642 | device_ctx->class_id.data[10], | |
643 | device_ctx->class_id.data[11], | |
644 | device_ctx->class_id.data[12], | |
645 | device_ctx->class_id.data[13], | |
646 | device_ctx->class_id.data[14], | |
647 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
648 | |
649 | if (ret) | |
3e7ee490 | 650 | return ret; |
3e7ee490 | 651 | |
90c9960e GKH |
652 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
653 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
654 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
655 | device_ctx->device_id.data[3], | |
656 | device_ctx->device_id.data[2], | |
657 | device_ctx->device_id.data[1], | |
658 | device_ctx->device_id.data[0], | |
659 | device_ctx->device_id.data[5], | |
660 | device_ctx->device_id.data[4], | |
661 | device_ctx->device_id.data[7], | |
662 | device_ctx->device_id.data[6], | |
663 | device_ctx->device_id.data[8], | |
664 | device_ctx->device_id.data[9], | |
665 | device_ctx->device_id.data[10], | |
666 | device_ctx->device_id.data[11], | |
667 | device_ctx->device_id.data[12], | |
668 | device_ctx->device_id.data[13], | |
669 | device_ctx->device_id.data[14], | |
670 | device_ctx->device_id.data[15]); | |
3e7ee490 | 671 | if (ret) |
3e7ee490 | 672 | return ret; |
3e7ee490 | 673 | |
3e7ee490 HJ |
674 | return 0; |
675 | } | |
676 | ||
3e189519 | 677 | /* |
90c9960e GKH |
678 | * vmbus_match - Attempt to match the specified device to the specified driver |
679 | */ | |
3e7ee490 HJ |
680 | static int vmbus_match(struct device *device, struct device_driver *driver) |
681 | { | |
90c9960e | 682 | int match = 0; |
3e7ee490 | 683 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 684 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 685 | |
454f18a9 | 686 | /* We found our driver ? */ |
90c9960e GKH |
687 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
688 | sizeof(struct hv_guid)) == 0) { | |
689 | /* | |
690 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
691 | * it here to access the struct hv_driver field | |
692 | */ | |
693 | struct vmbus_driver_context *vmbus_drv_ctx = | |
694 | (struct vmbus_driver_context *)driver_ctx; | |
695 | ||
3e7ee490 | 696 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
90c9960e GKH |
697 | DPRINT_INFO(VMBUS_DRV, |
698 | "device object (%p) set to driver object (%p)", | |
699 | &device_ctx->device_obj, | |
700 | device_ctx->device_obj.Driver); | |
3e7ee490 HJ |
701 | |
702 | match = 1; | |
703 | } | |
3e7ee490 HJ |
704 | return match; |
705 | } | |
706 | ||
3e189519 | 707 | /* |
90c9960e GKH |
708 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
709 | * | |
710 | * We need a callback because we cannot invoked device_unregister() inside | |
711 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
712 | * i.e. we cannot call device_unregister() inside device_register() | |
713 | */ | |
3e7ee490 | 714 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 715 | { |
f916a34d | 716 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 | 717 | |
90c9960e GKH |
718 | /* |
719 | * Kick off the process of unregistering the device. | |
720 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
721 | */ | |
3e7ee490 HJ |
722 | device_unregister(&device_ctx->device); |
723 | ||
454f18a9 | 724 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
725 | } |
726 | ||
3e189519 | 727 | /* |
90c9960e GKH |
728 | * vmbus_probe - Add the new vmbus's child device |
729 | */ | |
3e7ee490 HJ |
730 | static int vmbus_probe(struct device *child_device) |
731 | { | |
90c9960e GKH |
732 | int ret = 0; |
733 | struct driver_context *driver_ctx = | |
734 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
735 | struct vm_device *device_ctx = |
736 | device_to_vm_device(child_device); | |
3e7ee490 | 737 | |
454f18a9 | 738 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 739 | if (driver_ctx->probe) { |
3e7ee490 | 740 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
741 | if (ret != 0) { |
742 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
743 | "(%p) on driver %s (%d)...", | |
744 | dev_name(child_device), child_device, | |
745 | child_device->driver->name, ret); | |
746 | ||
747 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
748 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
749 | schedule_work(&device_ctx->probe_failed_work_item); |
750 | } | |
90c9960e GKH |
751 | } else { |
752 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
753 | child_device->driver->name); | |
3e7ee490 HJ |
754 | ret = -1; |
755 | } | |
3e7ee490 HJ |
756 | return ret; |
757 | } | |
758 | ||
3e189519 | 759 | /* |
90c9960e GKH |
760 | * vmbus_remove - Remove a vmbus device |
761 | */ | |
3e7ee490 HJ |
762 | static int vmbus_remove(struct device *child_device) |
763 | { | |
90c9960e | 764 | int ret; |
3e7ee490 HJ |
765 | struct driver_context *driver_ctx; |
766 | ||
454f18a9 | 767 | /* Special case root bus device */ |
90c9960e GKH |
768 | if (child_device->parent == NULL) { |
769 | /* | |
770 | * No-op since it is statically defined and handle in | |
771 | * vmbus_bus_exit() | |
772 | */ | |
3e7ee490 HJ |
773 | return 0; |
774 | } | |
775 | ||
90c9960e | 776 | if (child_device->driver) { |
3e7ee490 HJ |
777 | driver_ctx = driver_to_driver_context(child_device->driver); |
778 | ||
90c9960e GKH |
779 | /* |
780 | * Let the specific open-source driver handles the removal if | |
781 | * it can | |
782 | */ | |
783 | if (driver_ctx->remove) { | |
3e7ee490 | 784 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
785 | } else { |
786 | DPRINT_ERR(VMBUS_DRV, | |
787 | "remove() method not set for driver - %s", | |
788 | child_device->driver->name); | |
3e7ee490 HJ |
789 | ret = -1; |
790 | } | |
791 | } | |
3e7ee490 | 792 | |
3e7ee490 HJ |
793 | return 0; |
794 | } | |
795 | ||
3e189519 | 796 | /* |
90c9960e GKH |
797 | * vmbus_shutdown - Shutdown a vmbus device |
798 | */ | |
3e7ee490 HJ |
799 | static void vmbus_shutdown(struct device *child_device) |
800 | { | |
801 | struct driver_context *driver_ctx; | |
802 | ||
454f18a9 | 803 | /* Special case root bus device */ |
90c9960e GKH |
804 | if (child_device->parent == NULL) { |
805 | /* | |
806 | * No-op since it is statically defined and handle in | |
807 | * vmbus_bus_exit() | |
808 | */ | |
3e7ee490 HJ |
809 | return; |
810 | } | |
811 | ||
454f18a9 | 812 | /* The device may not be attached yet */ |
83c720ea | 813 | if (!child_device->driver) |
3e7ee490 | 814 | return; |
3e7ee490 HJ |
815 | |
816 | driver_ctx = driver_to_driver_context(child_device->driver); | |
817 | ||
454f18a9 | 818 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 819 | if (driver_ctx->shutdown) |
3e7ee490 | 820 | driver_ctx->shutdown(child_device); |
3e7ee490 | 821 | |
3e7ee490 HJ |
822 | return; |
823 | } | |
824 | ||
3e189519 | 825 | /* |
90c9960e GKH |
826 | * vmbus_bus_release - Final callback release of the vmbus root device |
827 | */ | |
3e7ee490 HJ |
828 | static void vmbus_bus_release(struct device *device) |
829 | { | |
689bf406 GKH |
830 | /* FIXME */ |
831 | /* Empty release functions are a bug, or a major sign | |
832 | * of a problem design, this MUST BE FIXED! */ | |
833 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
834 | WARN_ON(1); | |
3e7ee490 HJ |
835 | } |
836 | ||
3e189519 | 837 | /* |
90c9960e GKH |
838 | * vmbus_device_release - Final callback release of the vmbus child device |
839 | */ | |
3e7ee490 HJ |
840 | static void vmbus_device_release(struct device *device) |
841 | { | |
f916a34d | 842 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 843 | |
454f18a9 | 844 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
3e7ee490 HJ |
845 | kfree(device_ctx); |
846 | ||
454f18a9 | 847 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
848 | } |
849 | ||
3e189519 | 850 | /* |
90c9960e GKH |
851 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
852 | */ | |
3e7ee490 HJ |
853 | static void vmbus_msg_dpc(unsigned long data) |
854 | { | |
ee3d7ddf | 855 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 856 | |
a3810b0e | 857 | /* ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); */ |
3e7ee490 | 858 | |
454f18a9 | 859 | /* Call to bus driver to handle interrupt */ |
3e7ee490 | 860 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
861 | } |
862 | ||
3e189519 | 863 | /* |
90c9960e GKH |
864 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events |
865 | */ | |
3e7ee490 HJ |
866 | static void vmbus_event_dpc(unsigned long data) |
867 | { | |
ee3d7ddf | 868 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
3e7ee490 | 869 | |
a3810b0e | 870 | /* ASSERT(vmbus_drv_obj->OnEventDpc != NULL); */ |
3e7ee490 | 871 | |
454f18a9 | 872 | /* Call to bus driver to handle interrupt */ |
3e7ee490 | 873 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
3e7ee490 HJ |
874 | } |
875 | ||
90c9960e | 876 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 877 | { |
ee3d7ddf | 878 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
90c9960e | 879 | int ret; |
3e7ee490 | 880 | |
a3810b0e | 881 | /* ASSERT(vmbus_driver_obj->OnIsr != NULL); */ |
3e7ee490 | 882 | |
454f18a9 | 883 | /* Call to bus driver to handle interrupt */ |
3e7ee490 HJ |
884 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
885 | ||
454f18a9 | 886 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
887 | if (ret > 0) { |
888 | if (test_bit(0, (unsigned long *)&ret)) | |
3e7ee490 | 889 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
3e7ee490 | 890 | |
90c9960e | 891 | if (test_bit(1, (unsigned long *)&ret)) |
3e7ee490 | 892 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
3e7ee490 | 893 | |
3e7ee490 | 894 | return IRQ_HANDLED; |
90c9960e | 895 | } else { |
3e7ee490 HJ |
896 | return IRQ_NONE; |
897 | } | |
898 | } | |
899 | ||
c22090fa GKH |
900 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
901 | { | |
902 | .ident = "Hyper-V", | |
903 | .matches = { | |
904 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
905 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
906 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
907 | }, | |
908 | }, | |
909 | { }, | |
910 | }; | |
911 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
912 | ||
3e7ee490 HJ |
913 | static int __init vmbus_init(void) |
914 | { | |
3e7ee490 HJ |
915 | DPRINT_INFO(VMBUS_DRV, |
916 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
917 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 918 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 919 | |
c22090fa GKH |
920 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
921 | return -ENODEV; | |
922 | ||
83c720ea | 923 | return vmbus_bus_init(VmbusInitialize); |
3e7ee490 HJ |
924 | } |
925 | ||
3e7ee490 HJ |
926 | static void __exit vmbus_exit(void) |
927 | { | |
3e7ee490 | 928 | vmbus_bus_exit(); |
90c9960e | 929 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
930 | } |
931 | ||
9a775dbd GKH |
932 | /* |
933 | * We use a PCI table to determine if we should autoload this driver This is | |
934 | * needed by distro tools to determine if the hyperv drivers should be | |
935 | * installed and/or configured. We don't do anything else with the table, but | |
936 | * it needs to be present. | |
9a775dbd | 937 | */ |
15f0beb1 | 938 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
939 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
940 | { 0 } | |
941 | }; | |
942 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
943 | ||
90c9960e | 944 | MODULE_LICENSE("GPL"); |
26c14cc1 | 945 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
946 | module_param(vmbus_irq, int, S_IRUGO); |
947 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
948 | |
949 | module_init(vmbus_init); | |
950 | module_exit(vmbus_exit); |