2 * Copyright (c) 2009, Microsoft Corporation.
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.
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
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.
18 * Haiyang Zhang <haiyangz@microsoft.com>
19 * Hank Janssen <hjanssen@microsoft.com>
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>
27 #include <linux/pci.h>
28 #include <linux/dmi.h>
29 #include "VersionInfo.h"
35 /* FIXME! We need to do this dynamically for PIC and APIC system */
37 #define VMBUS_IRQ_VECTOR IRQ5_VECTOR
39 /* Main vmbus driver data structure */
40 struct vmbus_driver_context {
41 /* !! These must be the first 2 fields !! */
42 /* FIXME, this is a bug */
43 /* The driver field is not used in here. Instead, the bus field is */
44 /* used to represent the driver */
45 struct driver_context drv_ctx;
46 struct vmbus_driver drv_obj;
49 struct tasklet_struct msg_dpc;
50 struct tasklet_struct event_dpc;
52 /* The bus root device */
53 struct vm_device device_ctx;
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);
60 static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env);
61 static void vmbus_msg_dpc(unsigned long data);
62 static void vmbus_event_dpc(unsigned long data);
64 static irqreturn_t vmbus_isr(int irq, void *dev_id);
66 static void vmbus_device_release(struct device *device);
67 static void vmbus_bus_release(struct device *device);
69 static struct hv_device *vmbus_child_device_create(struct hv_guid *type,
70 struct hv_guid *instance,
72 static void vmbus_child_device_destroy(struct hv_device *device_obj);
73 static int vmbus_child_device_register(struct hv_device *root_device_obj,
74 struct hv_device *child_device_obj);
75 static void vmbus_child_device_unregister(struct hv_device *child_device_obj);
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,
83 unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
84 EXPORT_SYMBOL(vmbus_loglevel);
85 /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */
86 /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */
88 static int vmbus_irq = VMBUS_IRQ;
90 /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
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),
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),
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),
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),
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),
120 /* The one and only one */
121 static struct vmbus_driver_context g_vmbus_drv = {
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,
132 * vmbus_show_device_attr - Show the device attribute in sysfs.
134 * This is invoked when user does a
135 * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>"
137 static ssize_t vmbus_show_device_attr(struct device *dev,
138 struct device_attribute *dev_attr,
141 struct vm_device *device_ctx = device_to_vm_device(dev);
142 struct hv_device_info device_info;
144 memset(&device_info, 0, sizeof(struct hv_device_info));
146 vmbus_child_device_get_info(&device_ctx->device_obj, &device_info);
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")) {
187 return sprintf(buf, "%d\n", device_info.ChannelState);
188 } else if (!strcmp(dev_attr->attr.name, "id")) {
189 return sprintf(buf, "%d\n", device_info.ChannelId);
190 } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) {
191 return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask);
192 } else if (!strcmp(dev_attr->attr.name, "out_read_index")) {
193 return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex);
194 } else if (!strcmp(dev_attr->attr.name, "out_write_index")) {
195 return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex);
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")) {
203 return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask);
204 } else if (!strcmp(dev_attr->attr.name, "in_read_index")) {
205 return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex);
206 } else if (!strcmp(dev_attr->attr.name, "in_write_index")) {
207 return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex);
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")) {
215 return sprintf(buf, "%d\n", device_info.MonitorId);
216 } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) {
217 return sprintf(buf, "%d\n", device_info.ServerMonitorPending);
218 } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) {
219 return sprintf(buf, "%d\n", device_info.ServerMonitorLatency);
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")) {
224 return sprintf(buf, "%d\n", device_info.ClientMonitorPending);
225 } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) {
226 return sprintf(buf, "%d\n", device_info.ClientMonitorLatency);
227 } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) {
228 return sprintf(buf, "%d\n",
229 device_info.ClientMonitorConnectionId);
236 * vmbus_bus_init -Main vmbus driver initialization routine.
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
247 static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv))
249 struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv;
250 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
251 struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx;
255 DPRINT_ENTER(VMBUS_DRV);
258 * Set this up to allow lower layer to callback to add/remove child
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;
266 /* Call to bus driver to initialize */
267 ret = drv_init(&vmbus_drv_obj->Base);
269 DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret);
274 if (!vmbus_drv_obj->Base.OnDeviceAdd) {
275 DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set");
280 vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name;
282 /* Initialize the bus context */
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);
288 /* Now, register the bus driver with LDM */
289 ret = bus_register(&vmbus_drv_ctx->bus);
295 /* Get the interrupt resource */
296 ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM,
297 vmbus_drv_obj->Base.name, NULL);
300 DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d",
303 bus_unregister(&vmbus_drv_ctx->bus);
308 vector = VMBUS_IRQ_VECTOR;
310 DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector);
312 /* Call to bus driver to add the root device */
313 memset(dev_ctx, 0, sizeof(struct vm_device));
315 ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector);
317 DPRINT_ERR(VMBUS_DRV,
318 "ERROR - Unable to add vmbus root device");
320 free_irq(vmbus_irq, NULL);
322 bus_unregister(&vmbus_drv_ctx->bus);
327 /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */
328 dev_set_name(&dev_ctx->device, "vmbus_0_0");
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));
334 /* No need to bind a driver to the root device. */
335 dev_ctx->device.parent = NULL;
336 /* NULL; vmbus_remove() does not get invoked */
337 dev_ctx->device.bus = &vmbus_drv_ctx->bus;
339 /* Setup the device dispatch table */
340 dev_ctx->device.release = vmbus_bus_release;
342 /* Setup the bus as root device */
343 ret = device_register(&dev_ctx->device);
345 DPRINT_ERR(VMBUS_DRV,
346 "ERROR - Unable to register vmbus root device");
348 free_irq(vmbus_irq, NULL);
349 bus_unregister(&vmbus_drv_ctx->bus);
356 vmbus_drv_obj->GetChannelOffers();
359 DPRINT_EXIT(VMBUS_DRV);
365 * vmbus_bus_exit - Terminate the vmbus driver.
367 * This routine is opposite of vmbus_bus_init()
369 static void vmbus_bus_exit(void)
371 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
372 struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv;
374 struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx;
376 DPRINT_ENTER(VMBUS_DRV);
378 /* Remove the root device */
379 if (vmbus_drv_obj->Base.OnDeviceRemove)
380 vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj);
382 if (vmbus_drv_obj->Base.OnCleanup)
383 vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base);
385 /* Unregister the root bus device */
386 device_unregister(&dev_ctx->device);
388 bus_unregister(&vmbus_drv_ctx->bus);
390 free_irq(vmbus_irq, NULL);
392 tasklet_kill(&vmbus_drv_ctx->msg_dpc);
393 tasklet_kill(&vmbus_drv_ctx->event_dpc);
395 DPRINT_EXIT(VMBUS_DRV);
401 * vmbus_child_driver_register - Register a vmbus's child driver
403 int vmbus_child_driver_register(struct driver_context *driver_ctx)
405 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
408 DPRINT_ENTER(VMBUS_DRV);
410 DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s",
411 driver_ctx, driver_ctx->driver.name);
413 /* The child driver on this vmbus */
414 driver_ctx->driver.bus = &g_vmbus_drv.bus;
416 ret = driver_register(&driver_ctx->driver);
418 vmbus_drv_obj->GetChannelOffers();
420 DPRINT_EXIT(VMBUS_DRV);
424 EXPORT_SYMBOL(vmbus_child_driver_register);
427 * vmbus_child_driver_unregister Unregister a vmbus's child driver
429 void vmbus_child_driver_unregister(struct driver_context *driver_ctx)
431 DPRINT_ENTER(VMBUS_DRV);
433 DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s",
434 driver_ctx, driver_ctx->driver.name);
436 driver_unregister(&driver_ctx->driver);
438 driver_ctx->driver.bus = NULL;
440 DPRINT_EXIT(VMBUS_DRV);
442 EXPORT_SYMBOL(vmbus_child_driver_unregister);
445 * vmbus_get_interface - Get the vmbus channel interface.
447 * This is invoked by child/client driver that sits above vmbus
449 void vmbus_get_interface(struct vmbus_channel_interface *interface)
451 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
453 vmbus_drv_obj->GetChannelInterface(interface);
455 EXPORT_SYMBOL(vmbus_get_interface);
458 * vmbus_child_device_get_info - Get the vmbus child device info.
460 * This is invoked to display various device attributes in sysfs.
462 static void vmbus_child_device_get_info(struct hv_device *device_obj,
463 struct hv_device_info *device_info)
465 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
467 vmbus_drv_obj->GetChannelInfo(device_obj, device_info);
471 * vmbus_child_device_create - Creates and registers a new child device on the vmbus.
473 static struct hv_device *vmbus_child_device_create(struct hv_guid *type,
474 struct hv_guid *instance,
477 struct vm_device *child_device_ctx;
478 struct hv_device *child_device_obj;
480 DPRINT_ENTER(VMBUS_DRV);
482 /* Allocate the new child device */
483 child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL);
484 if (!child_device_ctx) {
485 DPRINT_ERR(VMBUS_DRV,
486 "unable to allocate device_context for child device");
487 DPRINT_EXIT(VMBUS_DRV);
492 DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - "
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}",
497 &child_device_ctx->device,
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],
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]);
511 child_device_obj = &child_device_ctx->device_obj;
512 child_device_obj->context = context;
513 memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid));
514 memcpy(&child_device_obj->deviceInstance, instance,
515 sizeof(struct hv_guid));
517 memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid));
518 memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid));
520 DPRINT_EXIT(VMBUS_DRV);
522 return child_device_obj;
526 * vmbus_child_device_register - Register the child device on the specified bus
528 static int vmbus_child_device_register(struct hv_device *root_device_obj,
529 struct hv_device *child_device_obj)
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);
536 static atomic_t device_num = ATOMIC_INIT(0);
538 DPRINT_ENTER(VMBUS_DRV);
540 DPRINT_DBG(VMBUS_DRV, "child device (%p) registering",
543 /* Set the device name. Otherwise, device_register() will fail. */
544 dev_set_name(&child_device_ctx->device, "vmbus_0_%d",
545 atomic_inc_return(&device_num));
547 /* The new device belongs to this bus */
548 child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */
549 child_device_ctx->device.parent = &root_device_ctx->device;
550 child_device_ctx->device.release = vmbus_device_release;
553 * Register with the LDM. This will kick off the driver/device
554 * binding...which will eventually call vmbus_match() and vmbus_probe()
556 ret = device_register(&child_device_ctx->device);
558 /* vmbus_probe() error does not get propergate to device_register(). */
559 ret = child_device_ctx->probe_error;
562 DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)",
563 &child_device_ctx->device);
565 DPRINT_INFO(VMBUS_DRV, "child device (%p) registered",
566 &child_device_ctx->device);
568 DPRINT_EXIT(VMBUS_DRV);
574 * vmbus_child_device_unregister - Remove the specified child device from the vmbus.
576 static void vmbus_child_device_unregister(struct hv_device *device_obj)
578 struct vm_device *device_ctx = to_vm_device(device_obj);
580 DPRINT_ENTER(VMBUS_DRV);
582 DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)",
583 &device_ctx->device);
586 * Kick off the process of unregistering the device.
587 * This will call vmbus_remove() and eventually vmbus_device_release()
589 device_unregister(&device_ctx->device);
591 DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered",
592 &device_ctx->device);
594 DPRINT_EXIT(VMBUS_DRV);
598 * vmbus_child_device_destroy - Destroy the specified child device on the vmbus.
600 static void vmbus_child_device_destroy(struct hv_device *device_obj)
602 DPRINT_ENTER(VMBUS_DRV);
604 DPRINT_EXIT(VMBUS_DRV);
608 * vmbus_uevent - add uevent for our device
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
614 static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
616 struct vm_device *device_ctx = device_to_vm_device(device);
619 DPRINT_ENTER(VMBUS_DRV);
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]);
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]);
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]);
681 DPRINT_EXIT(VMBUS_DRV);
687 * vmbus_match - Attempt to match the specified device to the specified driver
689 static int vmbus_match(struct device *device, struct device_driver *driver)
692 struct driver_context *driver_ctx = driver_to_driver_context(driver);
693 struct vm_device *device_ctx = device_to_vm_device(device);
695 DPRINT_ENTER(VMBUS_DRV);
697 /* We found our driver ? */
698 if (memcmp(&device_ctx->class_id, &driver_ctx->class_id,
699 sizeof(struct hv_guid)) == 0) {
701 * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast
702 * it here to access the struct hv_driver field
704 struct vmbus_driver_context *vmbus_drv_ctx =
705 (struct vmbus_driver_context *)driver_ctx;
707 device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base;
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);
716 DPRINT_EXIT(VMBUS_DRV);
722 * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe()
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()
728 static void vmbus_probe_failed_cb(struct work_struct *context)
730 struct vm_device *device_ctx = (struct vm_device *)context;
732 DPRINT_ENTER(VMBUS_DRV);
735 * Kick off the process of unregistering the device.
736 * This will call vmbus_remove() and eventually vmbus_device_release()
738 device_unregister(&device_ctx->device);
740 /* put_device(&device_ctx->device); */
741 DPRINT_EXIT(VMBUS_DRV);
745 * vmbus_probe - Add the new vmbus's child device
747 static int vmbus_probe(struct device *child_device)
750 struct driver_context *driver_ctx =
751 driver_to_driver_context(child_device->driver);
752 struct vm_device *device_ctx =
753 device_to_vm_device(child_device);
755 DPRINT_ENTER(VMBUS_DRV);
757 /* Let the specific open-source driver handles the probe if it can */
758 if (driver_ctx->probe) {
759 ret = device_ctx->probe_error = driver_ctx->probe(child_device);
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);
766 INIT_WORK(&device_ctx->probe_failed_work_item,
767 vmbus_probe_failed_cb);
768 schedule_work(&device_ctx->probe_failed_work_item);
771 DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s",
772 child_device->driver->name);
776 DPRINT_EXIT(VMBUS_DRV);
781 * vmbus_remove - Remove a vmbus device
783 static int vmbus_remove(struct device *child_device)
786 struct driver_context *driver_ctx;
788 DPRINT_ENTER(VMBUS_DRV);
790 /* Special case root bus device */
791 if (child_device->parent == NULL) {
793 * No-op since it is statically defined and handle in
796 DPRINT_EXIT(VMBUS_DRV);
800 if (child_device->driver) {
801 driver_ctx = driver_to_driver_context(child_device->driver);
804 * Let the specific open-source driver handles the removal if
807 if (driver_ctx->remove) {
808 ret = driver_ctx->remove(child_device);
810 DPRINT_ERR(VMBUS_DRV,
811 "remove() method not set for driver - %s",
812 child_device->driver->name);
817 DPRINT_EXIT(VMBUS_DRV);
823 * vmbus_shutdown - Shutdown a vmbus device
825 static void vmbus_shutdown(struct device *child_device)
827 struct driver_context *driver_ctx;
829 DPRINT_ENTER(VMBUS_DRV);
831 /* Special case root bus device */
832 if (child_device->parent == NULL) {
834 * No-op since it is statically defined and handle in
837 DPRINT_EXIT(VMBUS_DRV);
841 /* The device may not be attached yet */
842 if (!child_device->driver) {
843 DPRINT_EXIT(VMBUS_DRV);
847 driver_ctx = driver_to_driver_context(child_device->driver);
849 /* Let the specific open-source driver handles the removal if it can */
850 if (driver_ctx->shutdown)
851 driver_ctx->shutdown(child_device);
853 DPRINT_EXIT(VMBUS_DRV);
859 * vmbus_bus_release - Final callback release of the vmbus root device
861 static void vmbus_bus_release(struct device *device)
863 DPRINT_ENTER(VMBUS_DRV);
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__);
869 DPRINT_EXIT(VMBUS_DRV);
873 * vmbus_device_release - Final callback release of the vmbus child device
875 static void vmbus_device_release(struct device *device)
877 struct vm_device *device_ctx = device_to_vm_device(device);
879 DPRINT_ENTER(VMBUS_DRV);
881 /* vmbus_child_device_destroy(&device_ctx->device_obj); */
884 /* !!DO NOT REFERENCE device_ctx anymore at this point!! */
885 DPRINT_EXIT(VMBUS_DRV);
891 * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages
893 static void vmbus_msg_dpc(unsigned long data)
895 struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data;
897 DPRINT_ENTER(VMBUS_DRV);
899 ASSERT(vmbus_drv_obj->OnMsgDpc != NULL);
901 /* Call to bus driver to handle interrupt */
902 vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base);
904 DPRINT_EXIT(VMBUS_DRV);
908 * vmbus_msg_dpc - Tasklet routine to handle hypervisor events
910 static void vmbus_event_dpc(unsigned long data)
912 struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data;
914 DPRINT_ENTER(VMBUS_DRV);
916 ASSERT(vmbus_drv_obj->OnEventDpc != NULL);
918 /* Call to bus driver to handle interrupt */
919 vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base);
921 DPRINT_EXIT(VMBUS_DRV);
924 static irqreturn_t vmbus_isr(int irq, void *dev_id)
926 struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj;
929 DPRINT_ENTER(VMBUS_DRV);
931 ASSERT(vmbus_driver_obj->OnIsr != NULL);
933 /* Call to bus driver to handle interrupt */
934 ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base);
936 /* Schedules a dpc if necessary */
938 if (test_bit(0, (unsigned long *)&ret))
939 tasklet_schedule(&g_vmbus_drv.msg_dpc);
941 if (test_bit(1, (unsigned long *)&ret))
942 tasklet_schedule(&g_vmbus_drv.event_dpc);
944 DPRINT_EXIT(VMBUS_DRV);
947 DPRINT_EXIT(VMBUS_DRV);
952 static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = {
956 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
957 DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
958 DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
963 MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table);
965 static int __init vmbus_init(void)
969 DPRINT_ENTER(VMBUS_DRV);
971 DPRINT_INFO(VMBUS_DRV,
972 "Vmbus initializing.... current log level 0x%x (%x,%x)",
973 vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel));
974 /* Todo: it is used for loglevel, to be ported to new kernel. */
976 if (!dmi_check_system(microsoft_hv_dmi_table))
979 ret = vmbus_bus_init(VmbusInitialize);
981 DPRINT_EXIT(VMBUS_DRV);
985 static void __exit vmbus_exit(void)
987 DPRINT_ENTER(VMBUS_DRV);
990 /* Todo: it is used for loglevel, to be ported to new kernel. */
991 DPRINT_EXIT(VMBUS_DRV);
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.
1001 const static struct pci_device_id microsoft_hv_pci_table[] = {
1002 { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */
1005 MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table);
1007 MODULE_LICENSE("GPL");
1008 MODULE_VERSION(HV_DRV_VERSION);
1009 module_param(vmbus_irq, int, S_IRUGO);
1010 module_param(vmbus_loglevel, int, S_IRUGO);
1012 module_init(vmbus_init);
1013 module_exit(vmbus_exit);