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 <linux/slab.h>
30 #include "VersionInfo.h"
36 /* FIXME! We need to do this dynamically for PIC and APIC system */
38 #define VMBUS_IRQ_VECTOR IRQ5_VECTOR
40 /* Main vmbus driver data structure */
41 struct vmbus_driver_context {
42 /* !! These must be the first 2 fields !! */
43 /* FIXME, this is a bug */
44 /* The driver field is not used in here. Instead, the bus field is */
45 /* used to represent the driver */
46 struct driver_context drv_ctx;
47 struct vmbus_driver drv_obj;
50 struct tasklet_struct msg_dpc;
51 struct tasklet_struct event_dpc;
53 /* The bus root device */
54 struct vm_device device_ctx;
57 static int vmbus_match(struct device *device, struct device_driver *driver);
58 static int vmbus_probe(struct device *device);
59 static int vmbus_remove(struct device *device);
60 static void vmbus_shutdown(struct device *device);
61 static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env);
62 static void vmbus_msg_dpc(unsigned long data);
63 static void vmbus_event_dpc(unsigned long data);
65 static irqreturn_t vmbus_isr(int irq, void *dev_id);
67 static void vmbus_device_release(struct device *device);
68 static void vmbus_bus_release(struct device *device);
70 static struct hv_device *vmbus_child_device_create(struct hv_guid *type,
71 struct hv_guid *instance,
73 static void vmbus_child_device_destroy(struct hv_device *device_obj);
74 static int vmbus_child_device_register(struct hv_device *root_device_obj,
75 struct hv_device *child_device_obj);
76 static void vmbus_child_device_unregister(struct hv_device *child_device_obj);
77 static void vmbus_child_device_get_info(struct hv_device *device_obj,
78 struct hv_device_info *device_info);
79 static ssize_t vmbus_show_device_attr(struct device *dev,
80 struct device_attribute *dev_attr,
84 unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
85 EXPORT_SYMBOL(vmbus_loglevel);
86 /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */
87 /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */
89 static int vmbus_irq = VMBUS_IRQ;
91 /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
92 static struct device_attribute vmbus_device_attrs[] = {
93 __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL),
94 __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL),
95 __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
96 __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
97 __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),
99 __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
100 __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
101 __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
103 __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
104 __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
105 __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
107 __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
108 __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
109 __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
110 __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
111 __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
113 __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
114 __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
115 __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
116 __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
117 __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
121 /* The one and only one */
122 static struct vmbus_driver_context g_vmbus_drv = {
124 .bus.match = vmbus_match,
125 .bus.shutdown = vmbus_shutdown,
126 .bus.remove = vmbus_remove,
127 .bus.probe = vmbus_probe,
128 .bus.uevent = vmbus_uevent,
129 .bus.dev_attrs = vmbus_device_attrs,
133 * vmbus_show_device_attr - Show the device attribute in sysfs.
135 * This is invoked when user does a
136 * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>"
138 static ssize_t vmbus_show_device_attr(struct device *dev,
139 struct device_attribute *dev_attr,
142 struct vm_device *device_ctx = device_to_vm_device(dev);
143 struct hv_device_info device_info;
145 memset(&device_info, 0, sizeof(struct hv_device_info));
147 vmbus_child_device_get_info(&device_ctx->device_obj, &device_info);
149 if (!strcmp(dev_attr->attr.name, "class_id")) {
150 return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
151 "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
152 device_info.ChannelType.data[3],
153 device_info.ChannelType.data[2],
154 device_info.ChannelType.data[1],
155 device_info.ChannelType.data[0],
156 device_info.ChannelType.data[5],
157 device_info.ChannelType.data[4],
158 device_info.ChannelType.data[7],
159 device_info.ChannelType.data[6],
160 device_info.ChannelType.data[8],
161 device_info.ChannelType.data[9],
162 device_info.ChannelType.data[10],
163 device_info.ChannelType.data[11],
164 device_info.ChannelType.data[12],
165 device_info.ChannelType.data[13],
166 device_info.ChannelType.data[14],
167 device_info.ChannelType.data[15]);
168 } else if (!strcmp(dev_attr->attr.name, "device_id")) {
169 return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
170 "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
171 device_info.ChannelInstance.data[3],
172 device_info.ChannelInstance.data[2],
173 device_info.ChannelInstance.data[1],
174 device_info.ChannelInstance.data[0],
175 device_info.ChannelInstance.data[5],
176 device_info.ChannelInstance.data[4],
177 device_info.ChannelInstance.data[7],
178 device_info.ChannelInstance.data[6],
179 device_info.ChannelInstance.data[8],
180 device_info.ChannelInstance.data[9],
181 device_info.ChannelInstance.data[10],
182 device_info.ChannelInstance.data[11],
183 device_info.ChannelInstance.data[12],
184 device_info.ChannelInstance.data[13],
185 device_info.ChannelInstance.data[14],
186 device_info.ChannelInstance.data[15]);
187 } else if (!strcmp(dev_attr->attr.name, "state")) {
188 return sprintf(buf, "%d\n", device_info.ChannelState);
189 } else if (!strcmp(dev_attr->attr.name, "id")) {
190 return sprintf(buf, "%d\n", device_info.ChannelId);
191 } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) {
192 return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask);
193 } else if (!strcmp(dev_attr->attr.name, "out_read_index")) {
194 return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex);
195 } else if (!strcmp(dev_attr->attr.name, "out_write_index")) {
196 return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex);
197 } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) {
198 return sprintf(buf, "%d\n",
199 device_info.Outbound.BytesAvailToRead);
200 } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) {
201 return sprintf(buf, "%d\n",
202 device_info.Outbound.BytesAvailToWrite);
203 } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) {
204 return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask);
205 } else if (!strcmp(dev_attr->attr.name, "in_read_index")) {
206 return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex);
207 } else if (!strcmp(dev_attr->attr.name, "in_write_index")) {
208 return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex);
209 } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) {
210 return sprintf(buf, "%d\n",
211 device_info.Inbound.BytesAvailToRead);
212 } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) {
213 return sprintf(buf, "%d\n",
214 device_info.Inbound.BytesAvailToWrite);
215 } else if (!strcmp(dev_attr->attr.name, "monitor_id")) {
216 return sprintf(buf, "%d\n", device_info.MonitorId);
217 } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) {
218 return sprintf(buf, "%d\n", device_info.ServerMonitorPending);
219 } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) {
220 return sprintf(buf, "%d\n", device_info.ServerMonitorLatency);
221 } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) {
222 return sprintf(buf, "%d\n",
223 device_info.ServerMonitorConnectionId);
224 } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) {
225 return sprintf(buf, "%d\n", device_info.ClientMonitorPending);
226 } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) {
227 return sprintf(buf, "%d\n", device_info.ClientMonitorLatency);
228 } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) {
229 return sprintf(buf, "%d\n",
230 device_info.ClientMonitorConnectionId);
237 * vmbus_bus_init -Main vmbus driver initialization routine.
240 * - initialize the vmbus driver context
241 * - setup various driver entry points
242 * - invoke the vmbus hv main init routine
243 * - get the irq resource
244 * - invoke the vmbus to add the vmbus root device
245 * - setup the vmbus root device
246 * - retrieve the channel offers
248 static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv))
250 struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv;
251 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
252 struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx;
256 DPRINT_ENTER(VMBUS_DRV);
259 * Set this up to allow lower layer to callback to add/remove child
262 vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create;
263 vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy;
264 vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register;
265 vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister;
267 /* Call to bus driver to initialize */
268 ret = drv_init(&vmbus_drv_obj->Base);
270 DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret);
275 if (!vmbus_drv_obj->Base.OnDeviceAdd) {
276 DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set");
281 vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name;
283 /* Initialize the bus context */
284 tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc,
285 (unsigned long)vmbus_drv_obj);
286 tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc,
287 (unsigned long)vmbus_drv_obj);
289 /* Now, register the bus driver with LDM */
290 ret = bus_register(&vmbus_drv_ctx->bus);
296 /* Get the interrupt resource */
297 ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM,
298 vmbus_drv_obj->Base.name, NULL);
301 DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d",
304 bus_unregister(&vmbus_drv_ctx->bus);
309 vector = VMBUS_IRQ_VECTOR;
311 DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector);
313 /* Call to bus driver to add the root device */
314 memset(dev_ctx, 0, sizeof(struct vm_device));
316 ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector);
318 DPRINT_ERR(VMBUS_DRV,
319 "ERROR - Unable to add vmbus root device");
321 free_irq(vmbus_irq, NULL);
323 bus_unregister(&vmbus_drv_ctx->bus);
328 /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */
329 dev_set_name(&dev_ctx->device, "vmbus_0_0");
330 memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType,
331 sizeof(struct hv_guid));
332 memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance,
333 sizeof(struct hv_guid));
335 /* No need to bind a driver to the root device. */
336 dev_ctx->device.parent = NULL;
337 /* NULL; vmbus_remove() does not get invoked */
338 dev_ctx->device.bus = &vmbus_drv_ctx->bus;
340 /* Setup the device dispatch table */
341 dev_ctx->device.release = vmbus_bus_release;
343 /* Setup the bus as root device */
344 ret = device_register(&dev_ctx->device);
346 DPRINT_ERR(VMBUS_DRV,
347 "ERROR - Unable to register vmbus root device");
349 free_irq(vmbus_irq, NULL);
350 bus_unregister(&vmbus_drv_ctx->bus);
357 vmbus_drv_obj->GetChannelOffers();
360 DPRINT_EXIT(VMBUS_DRV);
366 * vmbus_bus_exit - Terminate the vmbus driver.
368 * This routine is opposite of vmbus_bus_init()
370 static void vmbus_bus_exit(void)
372 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
373 struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv;
375 struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx;
377 DPRINT_ENTER(VMBUS_DRV);
379 /* Remove the root device */
380 if (vmbus_drv_obj->Base.OnDeviceRemove)
381 vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj);
383 if (vmbus_drv_obj->Base.OnCleanup)
384 vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base);
386 /* Unregister the root bus device */
387 device_unregister(&dev_ctx->device);
389 bus_unregister(&vmbus_drv_ctx->bus);
391 free_irq(vmbus_irq, NULL);
393 tasklet_kill(&vmbus_drv_ctx->msg_dpc);
394 tasklet_kill(&vmbus_drv_ctx->event_dpc);
396 DPRINT_EXIT(VMBUS_DRV);
402 * vmbus_child_driver_register - Register a vmbus's child driver
404 int vmbus_child_driver_register(struct driver_context *driver_ctx)
406 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
409 DPRINT_ENTER(VMBUS_DRV);
411 DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s",
412 driver_ctx, driver_ctx->driver.name);
414 /* The child driver on this vmbus */
415 driver_ctx->driver.bus = &g_vmbus_drv.bus;
417 ret = driver_register(&driver_ctx->driver);
419 vmbus_drv_obj->GetChannelOffers();
421 DPRINT_EXIT(VMBUS_DRV);
425 EXPORT_SYMBOL(vmbus_child_driver_register);
428 * vmbus_child_driver_unregister Unregister a vmbus's child driver
430 void vmbus_child_driver_unregister(struct driver_context *driver_ctx)
432 DPRINT_ENTER(VMBUS_DRV);
434 DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s",
435 driver_ctx, driver_ctx->driver.name);
437 driver_unregister(&driver_ctx->driver);
439 driver_ctx->driver.bus = NULL;
441 DPRINT_EXIT(VMBUS_DRV);
443 EXPORT_SYMBOL(vmbus_child_driver_unregister);
446 * vmbus_get_interface - Get the vmbus channel interface.
448 * This is invoked by child/client driver that sits above vmbus
450 void vmbus_get_interface(struct vmbus_channel_interface *interface)
452 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
454 vmbus_drv_obj->GetChannelInterface(interface);
456 EXPORT_SYMBOL(vmbus_get_interface);
459 * vmbus_child_device_get_info - Get the vmbus child device info.
461 * This is invoked to display various device attributes in sysfs.
463 static void vmbus_child_device_get_info(struct hv_device *device_obj,
464 struct hv_device_info *device_info)
466 struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
468 vmbus_drv_obj->GetChannelInfo(device_obj, device_info);
472 * vmbus_child_device_create - Creates and registers a new child device on the vmbus.
474 static struct hv_device *vmbus_child_device_create(struct hv_guid *type,
475 struct hv_guid *instance,
478 struct vm_device *child_device_ctx;
479 struct hv_device *child_device_obj;
481 DPRINT_ENTER(VMBUS_DRV);
483 /* Allocate the new child device */
484 child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL);
485 if (!child_device_ctx) {
486 DPRINT_ERR(VMBUS_DRV,
487 "unable to allocate device_context for child device");
488 DPRINT_EXIT(VMBUS_DRV);
493 DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - "
494 "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-"
495 "%02x%02x%02x%02x%02x%02x%02x%02x},"
496 "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-"
497 "%02x%02x%02x%02x%02x%02x%02x%02x}",
498 &child_device_ctx->device,
499 type->data[3], type->data[2], type->data[1], type->data[0],
500 type->data[5], type->data[4], type->data[7], type->data[6],
501 type->data[8], type->data[9], type->data[10], type->data[11],
502 type->data[12], type->data[13], type->data[14], type->data[15],
503 instance->data[3], instance->data[2],
504 instance->data[1], instance->data[0],
505 instance->data[5], instance->data[4],
506 instance->data[7], instance->data[6],
507 instance->data[8], instance->data[9],
508 instance->data[10], instance->data[11],
509 instance->data[12], instance->data[13],
510 instance->data[14], instance->data[15]);
512 child_device_obj = &child_device_ctx->device_obj;
513 child_device_obj->context = context;
514 memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid));
515 memcpy(&child_device_obj->deviceInstance, instance,
516 sizeof(struct hv_guid));
518 memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid));
519 memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid));
521 DPRINT_EXIT(VMBUS_DRV);
523 return child_device_obj;
527 * vmbus_child_device_register - Register the child device on the specified bus
529 static int vmbus_child_device_register(struct hv_device *root_device_obj,
530 struct hv_device *child_device_obj)
533 struct vm_device *root_device_ctx =
534 to_vm_device(root_device_obj);
535 struct vm_device *child_device_ctx =
536 to_vm_device(child_device_obj);
537 static atomic_t device_num = ATOMIC_INIT(0);
539 DPRINT_ENTER(VMBUS_DRV);
541 DPRINT_DBG(VMBUS_DRV, "child device (%p) registering",
544 /* Set the device name. Otherwise, device_register() will fail. */
545 dev_set_name(&child_device_ctx->device, "vmbus_0_%d",
546 atomic_inc_return(&device_num));
548 /* The new device belongs to this bus */
549 child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */
550 child_device_ctx->device.parent = &root_device_ctx->device;
551 child_device_ctx->device.release = vmbus_device_release;
554 * Register with the LDM. This will kick off the driver/device
555 * binding...which will eventually call vmbus_match() and vmbus_probe()
557 ret = device_register(&child_device_ctx->device);
559 /* vmbus_probe() error does not get propergate to device_register(). */
560 ret = child_device_ctx->probe_error;
563 DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)",
564 &child_device_ctx->device);
566 DPRINT_INFO(VMBUS_DRV, "child device (%p) registered",
567 &child_device_ctx->device);
569 DPRINT_EXIT(VMBUS_DRV);
575 * vmbus_child_device_unregister - Remove the specified child device from the vmbus.
577 static void vmbus_child_device_unregister(struct hv_device *device_obj)
579 struct vm_device *device_ctx = to_vm_device(device_obj);
581 DPRINT_ENTER(VMBUS_DRV);
583 DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)",
584 &device_ctx->device);
587 * Kick off the process of unregistering the device.
588 * This will call vmbus_remove() and eventually vmbus_device_release()
590 device_unregister(&device_ctx->device);
592 DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered",
593 &device_ctx->device);
595 DPRINT_EXIT(VMBUS_DRV);
599 * vmbus_child_device_destroy - Destroy the specified child device on the vmbus.
601 static void vmbus_child_device_destroy(struct hv_device *device_obj)
603 DPRINT_ENTER(VMBUS_DRV);
605 DPRINT_EXIT(VMBUS_DRV);
609 * vmbus_uevent - add uevent for our device
611 * This routine is invoked when a device is added or removed on the vmbus to
612 * generate a uevent to udev in the userspace. The udev will then look at its
613 * rule and the uevent generated here to load the appropriate driver
615 static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
617 struct vm_device *device_ctx = device_to_vm_device(device);
620 DPRINT_ENTER(VMBUS_DRV);
622 DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={"
623 "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
624 "%02x%02x%02x%02x%02x%02x%02x%02x}",
625 device_ctx->class_id.data[3], device_ctx->class_id.data[2],
626 device_ctx->class_id.data[1], device_ctx->class_id.data[0],
627 device_ctx->class_id.data[5], device_ctx->class_id.data[4],
628 device_ctx->class_id.data[7], device_ctx->class_id.data[6],
629 device_ctx->class_id.data[8], device_ctx->class_id.data[9],
630 device_ctx->class_id.data[10],
631 device_ctx->class_id.data[11],
632 device_ctx->class_id.data[12],
633 device_ctx->class_id.data[13],
634 device_ctx->class_id.data[14],
635 device_ctx->class_id.data[15]);
637 ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={"
638 "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
639 "%02x%02x%02x%02x%02x%02x%02x%02x}",
640 device_ctx->class_id.data[3],
641 device_ctx->class_id.data[2],
642 device_ctx->class_id.data[1],
643 device_ctx->class_id.data[0],
644 device_ctx->class_id.data[5],
645 device_ctx->class_id.data[4],
646 device_ctx->class_id.data[7],
647 device_ctx->class_id.data[6],
648 device_ctx->class_id.data[8],
649 device_ctx->class_id.data[9],
650 device_ctx->class_id.data[10],
651 device_ctx->class_id.data[11],
652 device_ctx->class_id.data[12],
653 device_ctx->class_id.data[13],
654 device_ctx->class_id.data[14],
655 device_ctx->class_id.data[15]);
660 ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
661 "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
662 "%02x%02x%02x%02x%02x%02x%02x%02x}",
663 device_ctx->device_id.data[3],
664 device_ctx->device_id.data[2],
665 device_ctx->device_id.data[1],
666 device_ctx->device_id.data[0],
667 device_ctx->device_id.data[5],
668 device_ctx->device_id.data[4],
669 device_ctx->device_id.data[7],
670 device_ctx->device_id.data[6],
671 device_ctx->device_id.data[8],
672 device_ctx->device_id.data[9],
673 device_ctx->device_id.data[10],
674 device_ctx->device_id.data[11],
675 device_ctx->device_id.data[12],
676 device_ctx->device_id.data[13],
677 device_ctx->device_id.data[14],
678 device_ctx->device_id.data[15]);
682 DPRINT_EXIT(VMBUS_DRV);
688 * vmbus_match - Attempt to match the specified device to the specified driver
690 static int vmbus_match(struct device *device, struct device_driver *driver)
693 struct driver_context *driver_ctx = driver_to_driver_context(driver);
694 struct vm_device *device_ctx = device_to_vm_device(device);
696 DPRINT_ENTER(VMBUS_DRV);
698 /* We found our driver ? */
699 if (memcmp(&device_ctx->class_id, &driver_ctx->class_id,
700 sizeof(struct hv_guid)) == 0) {
702 * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast
703 * it here to access the struct hv_driver field
705 struct vmbus_driver_context *vmbus_drv_ctx =
706 (struct vmbus_driver_context *)driver_ctx;
708 device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base;
709 DPRINT_INFO(VMBUS_DRV,
710 "device object (%p) set to driver object (%p)",
711 &device_ctx->device_obj,
712 device_ctx->device_obj.Driver);
717 DPRINT_EXIT(VMBUS_DRV);
723 * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe()
725 * We need a callback because we cannot invoked device_unregister() inside
726 * vmbus_probe() since vmbus_probe() may be invoked inside device_register()
727 * i.e. we cannot call device_unregister() inside device_register()
729 static void vmbus_probe_failed_cb(struct work_struct *context)
731 struct vm_device *device_ctx = (struct vm_device *)context;
733 DPRINT_ENTER(VMBUS_DRV);
736 * Kick off the process of unregistering the device.
737 * This will call vmbus_remove() and eventually vmbus_device_release()
739 device_unregister(&device_ctx->device);
741 /* put_device(&device_ctx->device); */
742 DPRINT_EXIT(VMBUS_DRV);
746 * vmbus_probe - Add the new vmbus's child device
748 static int vmbus_probe(struct device *child_device)
751 struct driver_context *driver_ctx =
752 driver_to_driver_context(child_device->driver);
753 struct vm_device *device_ctx =
754 device_to_vm_device(child_device);
756 DPRINT_ENTER(VMBUS_DRV);
758 /* Let the specific open-source driver handles the probe if it can */
759 if (driver_ctx->probe) {
760 ret = device_ctx->probe_error = driver_ctx->probe(child_device);
762 DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s "
763 "(%p) on driver %s (%d)...",
764 dev_name(child_device), child_device,
765 child_device->driver->name, ret);
767 INIT_WORK(&device_ctx->probe_failed_work_item,
768 vmbus_probe_failed_cb);
769 schedule_work(&device_ctx->probe_failed_work_item);
772 DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s",
773 child_device->driver->name);
777 DPRINT_EXIT(VMBUS_DRV);
782 * vmbus_remove - Remove a vmbus device
784 static int vmbus_remove(struct device *child_device)
787 struct driver_context *driver_ctx;
789 DPRINT_ENTER(VMBUS_DRV);
791 /* Special case root bus device */
792 if (child_device->parent == NULL) {
794 * No-op since it is statically defined and handle in
797 DPRINT_EXIT(VMBUS_DRV);
801 if (child_device->driver) {
802 driver_ctx = driver_to_driver_context(child_device->driver);
805 * Let the specific open-source driver handles the removal if
808 if (driver_ctx->remove) {
809 ret = driver_ctx->remove(child_device);
811 DPRINT_ERR(VMBUS_DRV,
812 "remove() method not set for driver - %s",
813 child_device->driver->name);
818 DPRINT_EXIT(VMBUS_DRV);
824 * vmbus_shutdown - Shutdown a vmbus device
826 static void vmbus_shutdown(struct device *child_device)
828 struct driver_context *driver_ctx;
830 DPRINT_ENTER(VMBUS_DRV);
832 /* Special case root bus device */
833 if (child_device->parent == NULL) {
835 * No-op since it is statically defined and handle in
838 DPRINT_EXIT(VMBUS_DRV);
842 /* The device may not be attached yet */
843 if (!child_device->driver) {
844 DPRINT_EXIT(VMBUS_DRV);
848 driver_ctx = driver_to_driver_context(child_device->driver);
850 /* Let the specific open-source driver handles the removal if it can */
851 if (driver_ctx->shutdown)
852 driver_ctx->shutdown(child_device);
854 DPRINT_EXIT(VMBUS_DRV);
860 * vmbus_bus_release - Final callback release of the vmbus root device
862 static void vmbus_bus_release(struct device *device)
864 DPRINT_ENTER(VMBUS_DRV);
866 /* Empty release functions are a bug, or a major sign
867 * of a problem design, this MUST BE FIXED! */
868 dev_err(device, "%s needs to be fixed!\n", __func__);
870 DPRINT_EXIT(VMBUS_DRV);
874 * vmbus_device_release - Final callback release of the vmbus child device
876 static void vmbus_device_release(struct device *device)
878 struct vm_device *device_ctx = device_to_vm_device(device);
880 DPRINT_ENTER(VMBUS_DRV);
882 /* vmbus_child_device_destroy(&device_ctx->device_obj); */
885 /* !!DO NOT REFERENCE device_ctx anymore at this point!! */
886 DPRINT_EXIT(VMBUS_DRV);
892 * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages
894 static void vmbus_msg_dpc(unsigned long data)
896 struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data;
898 DPRINT_ENTER(VMBUS_DRV);
900 ASSERT(vmbus_drv_obj->OnMsgDpc != NULL);
902 /* Call to bus driver to handle interrupt */
903 vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base);
905 DPRINT_EXIT(VMBUS_DRV);
909 * vmbus_msg_dpc - Tasklet routine to handle hypervisor events
911 static void vmbus_event_dpc(unsigned long data)
913 struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data;
915 DPRINT_ENTER(VMBUS_DRV);
917 ASSERT(vmbus_drv_obj->OnEventDpc != NULL);
919 /* Call to bus driver to handle interrupt */
920 vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base);
922 DPRINT_EXIT(VMBUS_DRV);
925 static irqreturn_t vmbus_isr(int irq, void *dev_id)
927 struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj;
930 DPRINT_ENTER(VMBUS_DRV);
932 ASSERT(vmbus_driver_obj->OnIsr != NULL);
934 /* Call to bus driver to handle interrupt */
935 ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base);
937 /* Schedules a dpc if necessary */
939 if (test_bit(0, (unsigned long *)&ret))
940 tasklet_schedule(&g_vmbus_drv.msg_dpc);
942 if (test_bit(1, (unsigned long *)&ret))
943 tasklet_schedule(&g_vmbus_drv.event_dpc);
945 DPRINT_EXIT(VMBUS_DRV);
948 DPRINT_EXIT(VMBUS_DRV);
953 static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = {
957 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
958 DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
959 DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
964 MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table);
966 static int __init vmbus_init(void)
970 DPRINT_ENTER(VMBUS_DRV);
972 DPRINT_INFO(VMBUS_DRV,
973 "Vmbus initializing.... current log level 0x%x (%x,%x)",
974 vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel));
975 /* Todo: it is used for loglevel, to be ported to new kernel. */
977 if (!dmi_check_system(microsoft_hv_dmi_table))
980 ret = vmbus_bus_init(VmbusInitialize);
982 DPRINT_EXIT(VMBUS_DRV);
986 static void __exit vmbus_exit(void)
988 DPRINT_ENTER(VMBUS_DRV);
991 /* Todo: it is used for loglevel, to be ported to new kernel. */
992 DPRINT_EXIT(VMBUS_DRV);
997 * We use a PCI table to determine if we should autoload this driver This is
998 * needed by distro tools to determine if the hyperv drivers should be
999 * installed and/or configured. We don't do anything else with the table, but
1000 * it needs to be present.
1002 const static struct pci_device_id microsoft_hv_pci_table[] = {
1003 { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */
1006 MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table);
1008 MODULE_LICENSE("GPL");
1009 MODULE_VERSION(HV_DRV_VERSION);
1010 module_param(vmbus_irq, int, S_IRUGO);
1011 module_param(vmbus_loglevel, int, S_IRUGO);
1013 module_init(vmbus_init);
1014 module_exit(vmbus_exit);