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" |
150b19d4 | 35 | #include "channel.h" |
36199a99 | 36 | #include "vmbus_private.h" |
3e7ee490 | 37 | |
3e7ee490 | 38 | |
454f18a9 | 39 | /* FIXME! We need to do this dynamically for PIC and APIC system */ |
90c9960e GKH |
40 | #define VMBUS_IRQ 0x5 |
41 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR | |
454f18a9 BP |
42 | |
43 | /* Main vmbus driver data structure */ | |
3e7ee490 | 44 | struct vmbus_driver_context { |
454f18a9 | 45 | /* !! These must be the first 2 fields !! */ |
90c9960e | 46 | /* FIXME, this is a bug */ |
454f18a9 BP |
47 | /* The driver field is not used in here. Instead, the bus field is */ |
48 | /* used to represent the driver */ | |
90c9960e | 49 | struct driver_context drv_ctx; |
a69a6691 | 50 | struct hv_driver drv_obj; |
3e7ee490 | 51 | |
90c9960e GKH |
52 | struct bus_type bus; |
53 | struct tasklet_struct msg_dpc; | |
54 | struct tasklet_struct event_dpc; | |
3e7ee490 | 55 | |
454f18a9 | 56 | /* The bus root device */ |
f916a34d | 57 | struct vm_device device_ctx; |
3e7ee490 HJ |
58 | }; |
59 | ||
3e7ee490 HJ |
60 | static int vmbus_match(struct device *device, struct device_driver *driver); |
61 | static int vmbus_probe(struct device *device); | |
62 | static int vmbus_remove(struct device *device); | |
63 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 64 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 HJ |
65 | static void vmbus_msg_dpc(unsigned long data); |
66 | static void vmbus_event_dpc(unsigned long data); | |
67 | ||
90c9960e | 68 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
69 | |
70 | static void vmbus_device_release(struct device *device); | |
71 | static void vmbus_bus_release(struct device *device); | |
72 | ||
90c9960e GKH |
73 | static ssize_t vmbus_show_device_attr(struct device *dev, |
74 | struct device_attribute *dev_attr, | |
75 | char *buf); | |
3e7ee490 | 76 | |
3e7ee490 | 77 | |
90c9960e | 78 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 79 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
80 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
81 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
82 | |
83 | static int vmbus_irq = VMBUS_IRQ; | |
84 | ||
454f18a9 | 85 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
86 | static struct device_attribute vmbus_device_attrs[] = { |
87 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
88 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
89 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
90 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
91 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
92 | ||
93 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
94 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | ||
97 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
98 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
99 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
100 | ||
101 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
102 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
106 | ||
107 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
108 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
109 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
110 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
111 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
112 | __ATTR_NULL | |
113 | }; | |
3e7ee490 | 114 | |
454f18a9 | 115 | /* The one and only one */ |
adf874cb | 116 | static struct vmbus_driver_context vmbus_drv = { |
90c9960e GKH |
117 | .bus.name = "vmbus", |
118 | .bus.match = vmbus_match, | |
119 | .bus.shutdown = vmbus_shutdown, | |
120 | .bus.remove = vmbus_remove, | |
121 | .bus.probe = vmbus_probe, | |
122 | .bus.uevent = vmbus_uevent, | |
123 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
124 | }; |
125 | ||
adf874cb | 126 | static const char *driver_name = "hyperv"; |
36199a99 GKH |
127 | |
128 | /* | |
129 | * Windows vmbus does not defined this. | |
130 | * We defined this to be consistent with other devices | |
131 | */ | |
132 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
adf874cb | 133 | static const struct hv_guid device_type = { |
36199a99 GKH |
134 | .data = { |
135 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
136 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
137 | } | |
138 | }; | |
139 | ||
140 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ | |
adf874cb | 141 | static const struct hv_guid device_id = { |
36199a99 GKH |
142 | .data = { |
143 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
144 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
145 | } | |
146 | }; | |
147 | ||
adf874cb | 148 | static struct hv_device *vmbus_device; /* vmbus root device */ |
36199a99 GKH |
149 | |
150 | /* | |
646f1ea3 | 151 | * vmbus_child_dev_add - Registers the child device with the vmbus |
36199a99 | 152 | */ |
646f1ea3 | 153 | int vmbus_child_dev_add(struct hv_device *child_dev) |
36199a99 | 154 | { |
adf874cb | 155 | return vmbus_child_device_register(vmbus_device, child_dev); |
36199a99 GKH |
156 | } |
157 | ||
158 | /* | |
646f1ea3 | 159 | * vmbus_dev_add - Callback when the root bus device is added |
36199a99 | 160 | */ |
646f1ea3 | 161 | static int vmbus_dev_add(struct hv_device *dev, void *info) |
36199a99 | 162 | { |
adf874cb | 163 | u32 *irqvector = info; |
36199a99 GKH |
164 | int ret; |
165 | ||
adf874cb | 166 | vmbus_device = dev; |
36199a99 | 167 | |
ca623ad3 HZ |
168 | memcpy(&vmbus_device->dev_type, &device_type, sizeof(struct hv_guid)); |
169 | memcpy(&vmbus_device->dev_instance, &device_id, | |
36199a99 GKH |
170 | sizeof(struct hv_guid)); |
171 | ||
172 | /* strcpy(dev->name, "vmbus"); */ | |
173 | /* SynIC setup... */ | |
174 | on_each_cpu(hv_synic_init, (void *)irqvector, 1); | |
175 | ||
176 | /* Connect to VMBus in the root partition */ | |
c6977677 | 177 | ret = vmbus_connect(); |
36199a99 GKH |
178 | |
179 | /* VmbusSendEvent(device->localPortId+1); */ | |
180 | return ret; | |
181 | } | |
182 | ||
183 | /* | |
646f1ea3 | 184 | * vmbus_dev_rm - Callback when the root bus device is removed |
36199a99 | 185 | */ |
646f1ea3 | 186 | static int vmbus_dev_rm(struct hv_device *dev) |
36199a99 GKH |
187 | { |
188 | int ret = 0; | |
189 | ||
190 | vmbus_release_unattached_channels(); | |
c6977677 | 191 | vmbus_disconnect(); |
36199a99 GKH |
192 | on_each_cpu(hv_synic_cleanup, NULL, 1); |
193 | return ret; | |
194 | } | |
195 | ||
196 | /* | |
646f1ea3 | 197 | * vmbus_cleanup - Perform any cleanup when the driver is removed |
36199a99 | 198 | */ |
646f1ea3 | 199 | static void vmbus_cleanup(struct hv_driver *drv) |
36199a99 GKH |
200 | { |
201 | /* struct vmbus_driver *driver = (struct vmbus_driver *)drv; */ | |
202 | ||
203 | hv_cleanup(); | |
204 | } | |
205 | ||
bf6506f6 TT |
206 | struct onmessage_work_context { |
207 | struct work_struct work; | |
208 | struct hv_message msg; | |
209 | }; | |
210 | ||
211 | static void vmbus_onmessage_work(struct work_struct *work) | |
212 | { | |
213 | struct onmessage_work_context *ctx; | |
214 | ||
215 | ctx = container_of(work, struct onmessage_work_context, | |
216 | work); | |
217 | vmbus_onmessage(&ctx->msg); | |
218 | kfree(ctx); | |
219 | } | |
220 | ||
36199a99 GKH |
221 | /* |
222 | * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior | |
223 | */ | |
cef6dbfa | 224 | static void vmbus_on_msg_dpc(struct hv_driver *drv) |
36199a99 GKH |
225 | { |
226 | int cpu = smp_processor_id(); | |
227 | void *page_addr = hv_context.synic_message_page[cpu]; | |
228 | struct hv_message *msg = (struct hv_message *)page_addr + | |
229 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 230 | struct onmessage_work_context *ctx; |
36199a99 GKH |
231 | |
232 | while (1) { | |
233 | if (msg->header.message_type == HVMSG_NONE) { | |
234 | /* no msg */ | |
235 | break; | |
236 | } else { | |
bf6506f6 TT |
237 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
238 | if (ctx == NULL) | |
36199a99 | 239 | continue; |
bf6506f6 TT |
240 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
241 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 242 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
243 | } |
244 | ||
245 | msg->header.message_type = HVMSG_NONE; | |
246 | ||
247 | /* | |
248 | * Make sure the write to MessageType (ie set to | |
249 | * HVMSG_NONE) happens before we read the | |
250 | * MessagePending and EOMing. Otherwise, the EOMing | |
251 | * will not deliver any more messages since there is | |
252 | * no empty slot | |
253 | */ | |
254 | mb(); | |
255 | ||
256 | if (msg->header.message_flags.msg_pending) { | |
257 | /* | |
258 | * This will cause message queue rescan to | |
259 | * possibly deliver another msg from the | |
260 | * hypervisor | |
261 | */ | |
262 | wrmsrl(HV_X64_MSR_EOM, 0); | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
36199a99 GKH |
267 | /* |
268 | * vmbus_on_isr - ISR routine | |
269 | */ | |
cef6dbfa | 270 | static int vmbus_on_isr(struct hv_driver *drv) |
36199a99 GKH |
271 | { |
272 | int ret = 0; | |
273 | int cpu = smp_processor_id(); | |
274 | void *page_addr; | |
275 | struct hv_message *msg; | |
276 | union hv_synic_event_flags *event; | |
277 | ||
278 | page_addr = hv_context.synic_message_page[cpu]; | |
279 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
280 | ||
281 | /* Check if there are actual msgs to be process */ | |
282 | if (msg->header.message_type != HVMSG_NONE) { | |
283 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
284 | msg->header.message_type, | |
285 | msg->header.payload_size); | |
286 | ret |= 0x1; | |
287 | } | |
288 | ||
289 | /* TODO: Check if there are events to be process */ | |
290 | page_addr = hv_context.synic_event_page[cpu]; | |
291 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; | |
292 | ||
293 | /* Since we are a child, we only need to check bit 0 */ | |
294 | if (test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { | |
295 | DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]); | |
296 | ret |= 0x2; | |
297 | } | |
298 | ||
299 | return ret; | |
300 | } | |
301 | ||
150b19d4 GKH |
302 | static void get_channel_info(struct hv_device *device, |
303 | struct hv_device_info *info) | |
304 | { | |
305 | struct vmbus_channel_debug_info debug_info; | |
306 | ||
cae5b843 | 307 | if (!device->channel) |
150b19d4 GKH |
308 | return; |
309 | ||
cae5b843 | 310 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 311 | |
ca623ad3 HZ |
312 | info->chn_id = debug_info.relid; |
313 | info->chn_state = debug_info.state; | |
314 | memcpy(&info->chn_type, &debug_info.interfacetype, | |
150b19d4 | 315 | sizeof(struct hv_guid)); |
ca623ad3 | 316 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
150b19d4 GKH |
317 | sizeof(struct hv_guid)); |
318 | ||
ca623ad3 | 319 | info->monitor_id = debug_info.monitorid; |
150b19d4 | 320 | |
ca623ad3 HZ |
321 | info->server_monitor_pending = debug_info.servermonitor_pending; |
322 | info->server_monitor_latency = debug_info.servermonitor_latency; | |
323 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; | |
150b19d4 | 324 | |
ca623ad3 HZ |
325 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
326 | info->client_monitor_latency = debug_info.clientmonitor_latency; | |
327 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; | |
150b19d4 | 328 | |
ca623ad3 HZ |
329 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
330 | info->inbound.read_idx = debug_info.inbound.current_read_index; | |
331 | info->inbound.write_idx = debug_info.inbound.current_write_index; | |
332 | info->inbound.bytes_avail_toread = | |
333 | debug_info.inbound.bytes_avail_toread; | |
334 | info->inbound.bytes_avail_towrite = | |
82f8bd40 HZ |
335 | debug_info.inbound.bytes_avail_towrite; |
336 | ||
ca623ad3 | 337 | info->outbound.int_mask = |
82f8bd40 | 338 | debug_info.outbound.current_interrupt_mask; |
ca623ad3 HZ |
339 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
340 | info->outbound.write_idx = debug_info.outbound.current_write_index; | |
341 | info->outbound.bytes_avail_toread = | |
82f8bd40 | 342 | debug_info.outbound.bytes_avail_toread; |
ca623ad3 | 343 | info->outbound.bytes_avail_towrite = |
82f8bd40 | 344 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
345 | } |
346 | ||
3e189519 | 347 | /* |
90c9960e GKH |
348 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
349 | * | |
350 | * This is invoked when user does a | |
351 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
352 | */ | |
353 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
354 | struct device_attribute *dev_attr, | |
355 | char *buf) | |
3e7ee490 | 356 | { |
f916a34d | 357 | struct vm_device *device_ctx = device_to_vm_device(dev); |
ee3d7ddf | 358 | struct hv_device_info device_info; |
3e7ee490 | 359 | |
ee3d7ddf | 360 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 361 | |
a4e91ed2 | 362 | get_channel_info(&device_ctx->device_obj, &device_info); |
3e7ee490 | 363 | |
90c9960e GKH |
364 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
365 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
366 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
367 | device_info.chn_type.data[3], |
368 | device_info.chn_type.data[2], | |
369 | device_info.chn_type.data[1], | |
370 | device_info.chn_type.data[0], | |
371 | device_info.chn_type.data[5], | |
372 | device_info.chn_type.data[4], | |
373 | device_info.chn_type.data[7], | |
374 | device_info.chn_type.data[6], | |
375 | device_info.chn_type.data[8], | |
376 | device_info.chn_type.data[9], | |
377 | device_info.chn_type.data[10], | |
378 | device_info.chn_type.data[11], | |
379 | device_info.chn_type.data[12], | |
380 | device_info.chn_type.data[13], | |
381 | device_info.chn_type.data[14], | |
382 | device_info.chn_type.data[15]); | |
90c9960e GKH |
383 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
384 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
385 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
386 | device_info.chn_instance.data[3], |
387 | device_info.chn_instance.data[2], | |
388 | device_info.chn_instance.data[1], | |
389 | device_info.chn_instance.data[0], | |
390 | device_info.chn_instance.data[5], | |
391 | device_info.chn_instance.data[4], | |
392 | device_info.chn_instance.data[7], | |
393 | device_info.chn_instance.data[6], | |
394 | device_info.chn_instance.data[8], | |
395 | device_info.chn_instance.data[9], | |
396 | device_info.chn_instance.data[10], | |
397 | device_info.chn_instance.data[11], | |
398 | device_info.chn_instance.data[12], | |
399 | device_info.chn_instance.data[13], | |
400 | device_info.chn_instance.data[14], | |
401 | device_info.chn_instance.data[15]); | |
90c9960e | 402 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
ca623ad3 | 403 | return sprintf(buf, "%d\n", device_info.chn_state); |
90c9960e | 404 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
ca623ad3 | 405 | return sprintf(buf, "%d\n", device_info.chn_id); |
90c9960e | 406 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
ca623ad3 | 407 | return sprintf(buf, "%d\n", device_info.outbound.int_mask); |
90c9960e | 408 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
ca623ad3 | 409 | return sprintf(buf, "%d\n", device_info.outbound.read_idx); |
90c9960e | 410 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
ca623ad3 | 411 | return sprintf(buf, "%d\n", device_info.outbound.write_idx); |
90c9960e GKH |
412 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
413 | return sprintf(buf, "%d\n", | |
ca623ad3 | 414 | device_info.outbound.bytes_avail_toread); |
90c9960e GKH |
415 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
416 | return sprintf(buf, "%d\n", | |
ca623ad3 | 417 | device_info.outbound.bytes_avail_towrite); |
90c9960e | 418 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
ca623ad3 | 419 | return sprintf(buf, "%d\n", device_info.inbound.int_mask); |
90c9960e | 420 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
ca623ad3 | 421 | return sprintf(buf, "%d\n", device_info.inbound.read_idx); |
90c9960e | 422 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
ca623ad3 | 423 | return sprintf(buf, "%d\n", device_info.inbound.write_idx); |
90c9960e GKH |
424 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
425 | return sprintf(buf, "%d\n", | |
ca623ad3 | 426 | device_info.inbound.bytes_avail_toread); |
90c9960e GKH |
427 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
428 | return sprintf(buf, "%d\n", | |
ca623ad3 | 429 | device_info.inbound.bytes_avail_towrite); |
90c9960e | 430 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
ca623ad3 | 431 | return sprintf(buf, "%d\n", device_info.monitor_id); |
90c9960e | 432 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
ca623ad3 | 433 | return sprintf(buf, "%d\n", device_info.server_monitor_pending); |
90c9960e | 434 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
ca623ad3 | 435 | return sprintf(buf, "%d\n", device_info.server_monitor_latency); |
90c9960e GKH |
436 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
437 | return sprintf(buf, "%d\n", | |
ca623ad3 | 438 | device_info.server_monitor_conn_id); |
90c9960e | 439 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
ca623ad3 | 440 | return sprintf(buf, "%d\n", device_info.client_monitor_pending); |
90c9960e | 441 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
ca623ad3 | 442 | return sprintf(buf, "%d\n", device_info.client_monitor_latency); |
90c9960e GKH |
443 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
444 | return sprintf(buf, "%d\n", | |
ca623ad3 | 445 | device_info.client_monitor_conn_id); |
90c9960e | 446 | } else { |
3e7ee490 HJ |
447 | return 0; |
448 | } | |
449 | } | |
450 | ||
3e189519 | 451 | /* |
90c9960e GKH |
452 | * vmbus_bus_init -Main vmbus driver initialization routine. |
453 | * | |
454 | * Here, we | |
0686e4f4 LL |
455 | * - initialize the vmbus driver context |
456 | * - setup various driver entry points | |
457 | * - invoke the vmbus hv main init routine | |
458 | * - get the irq resource | |
459 | * - invoke the vmbus to add the vmbus root device | |
460 | * - setup the vmbus root device | |
461 | * - retrieve the channel offers | |
90c9960e | 462 | */ |
6c884555 | 463 | static int vmbus_bus_init(void) |
3e7ee490 | 464 | { |
adf874cb HZ |
465 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
466 | struct hv_driver *driver = &vmbus_drv.drv_obj; | |
467 | struct vm_device *dev_ctx = &vmbus_drv.device_ctx; | |
90c9960e GKH |
468 | int ret; |
469 | unsigned int vector; | |
3e7ee490 | 470 | |
6d26e38f GKH |
471 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
472 | HV_DRV_VERSION); | |
473 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", | |
474 | VMBUS_REVISION_NUMBER); | |
475 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
476 | VMBUS_MESSAGE_SINT); | |
477 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " | |
478 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", | |
479 | sizeof(struct vmbus_channel_packet_page_buffer), | |
480 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
481 | ||
adf874cb | 482 | driver->name = driver_name; |
ca623ad3 | 483 | memcpy(&driver->dev_type, &device_type, sizeof(struct hv_guid)); |
6d26e38f GKH |
484 | |
485 | /* Setup dispatch table */ | |
ca623ad3 HZ |
486 | driver->dev_add = vmbus_dev_add; |
487 | driver->dev_rm = vmbus_dev_rm; | |
488 | driver->cleanup = vmbus_cleanup; | |
6d26e38f GKH |
489 | |
490 | /* Hypervisor initialization...setup hypercall page..etc */ | |
491 | ret = hv_init(); | |
90c9960e | 492 | if (ret != 0) { |
6d26e38f GKH |
493 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", |
494 | ret); | |
3e7ee490 HJ |
495 | goto cleanup; |
496 | } | |
497 | ||
454f18a9 | 498 | /* Sanity checks */ |
ca623ad3 | 499 | if (!driver->dev_add) { |
3e7ee490 HJ |
500 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
501 | ret = -1; | |
502 | goto cleanup; | |
503 | } | |
504 | ||
a69a6691 | 505 | vmbus_drv_ctx->bus.name = driver->name; |
3e7ee490 | 506 | |
454f18a9 | 507 | /* Initialize the bus context */ |
90c9960e | 508 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
a69a6691 | 509 | (unsigned long)driver); |
90c9960e | 510 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, |
a69a6691 | 511 | (unsigned long)driver); |
3e7ee490 | 512 | |
454f18a9 | 513 | /* Now, register the bus driver with LDM */ |
c19fbca3 | 514 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 515 | if (ret) { |
c19fbca3 BP |
516 | ret = -1; |
517 | goto cleanup; | |
518 | } | |
3e7ee490 | 519 | |
454f18a9 | 520 | /* Get the interrupt resource */ |
90c9960e | 521 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
a69a6691 | 522 | driver->name, NULL); |
3e7ee490 | 523 | |
90c9960e GKH |
524 | if (ret != 0) { |
525 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
526 | vmbus_irq); | |
3e7ee490 HJ |
527 | |
528 | bus_unregister(&vmbus_drv_ctx->bus); | |
529 | ||
530 | ret = -1; | |
531 | goto cleanup; | |
532 | } | |
3e7ee490 | 533 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
534 | |
535 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
536 | ||
454f18a9 | 537 | /* Call to bus driver to add the root device */ |
f916a34d | 538 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
3e7ee490 | 539 | |
ca623ad3 | 540 | ret = driver->dev_add(&dev_ctx->device_obj, &vector); |
90c9960e GKH |
541 | if (ret != 0) { |
542 | DPRINT_ERR(VMBUS_DRV, | |
543 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
544 | |
545 | free_irq(vmbus_irq, NULL); | |
546 | ||
547 | bus_unregister(&vmbus_drv_ctx->bus); | |
548 | ||
549 | ret = -1; | |
550 | goto cleanup; | |
551 | } | |
454f18a9 | 552 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 553 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
ca623ad3 | 554 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.dev_type, |
90c9960e | 555 | sizeof(struct hv_guid)); |
ca623ad3 | 556 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.dev_instance, |
90c9960e | 557 | sizeof(struct hv_guid)); |
3e7ee490 | 558 | |
454f18a9 | 559 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 560 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
561 | /* NULL; vmbus_remove() does not get invoked */ |
562 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 563 | |
454f18a9 | 564 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
565 | dev_ctx->device.release = vmbus_bus_release; |
566 | ||
454f18a9 | 567 | /* Setup the bus as root device */ |
5d48a1c2 | 568 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
569 | if (ret) { |
570 | DPRINT_ERR(VMBUS_DRV, | |
571 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
572 | |
573 | free_irq(vmbus_irq, NULL); | |
574 | bus_unregister(&vmbus_drv_ctx->bus); | |
575 | ||
576 | ret = -1; | |
577 | goto cleanup; | |
578 | } | |
579 | ||
2d6e882b | 580 | vmbus_request_offers(); |
8b5d6d3b HZ |
581 | wait_for_completion(&hv_channel_ready); |
582 | ||
3e7ee490 | 583 | cleanup: |
3e7ee490 HJ |
584 | return ret; |
585 | } | |
586 | ||
3e189519 | 587 | /* |
90c9960e GKH |
588 | * vmbus_bus_exit - Terminate the vmbus driver. |
589 | * | |
590 | * This routine is opposite of vmbus_bus_init() | |
591 | */ | |
bd1de709 | 592 | static void vmbus_bus_exit(void) |
3e7ee490 | 593 | { |
adf874cb HZ |
594 | struct hv_driver *driver = &vmbus_drv.drv_obj; |
595 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; | |
3e7ee490 | 596 | |
adf874cb | 597 | struct vm_device *dev_ctx = &vmbus_drv.device_ctx; |
3e7ee490 | 598 | |
454f18a9 | 599 | /* Remove the root device */ |
ca623ad3 HZ |
600 | if (driver->dev_rm) |
601 | driver->dev_rm(&dev_ctx->device_obj); | |
3e7ee490 | 602 | |
ca623ad3 HZ |
603 | if (driver->cleanup) |
604 | driver->cleanup(driver); | |
3e7ee490 | 605 | |
454f18a9 | 606 | /* Unregister the root bus device */ |
3e7ee490 HJ |
607 | device_unregister(&dev_ctx->device); |
608 | ||
609 | bus_unregister(&vmbus_drv_ctx->bus); | |
610 | ||
611 | free_irq(vmbus_irq, NULL); | |
612 | ||
613 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
614 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
615 | } |
616 | ||
3e189519 | 617 | |
90c9960e | 618 | /** |
3e189519 HJ |
619 | * vmbus_child_driver_register() - Register a vmbus's child driver |
620 | * @driver_ctx: Pointer to driver structure you want to register | |
621 | * | |
622 | * @driver_ctx is of type &struct driver_context | |
623 | * | |
624 | * Registers the given driver with Linux through the 'driver_register()' call | |
625 | * And sets up the hyper-v vmbus handling for this driver. | |
626 | * It will return the state of the 'driver_register()' call. | |
627 | * | |
628 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
629 | */ |
630 | int vmbus_child_driver_register(struct driver_context *driver_ctx) | |
3e7ee490 | 631 | { |
5d48a1c2 | 632 | int ret; |
3e7ee490 | 633 | |
90c9960e GKH |
634 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
635 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 | 636 | |
454f18a9 | 637 | /* The child driver on this vmbus */ |
adf874cb | 638 | driver_ctx->driver.bus = &vmbus_drv.bus; |
3e7ee490 | 639 | |
5d48a1c2 | 640 | ret = driver_register(&driver_ctx->driver); |
3e7ee490 | 641 | |
2d6e882b | 642 | vmbus_request_offers(); |
3e7ee490 | 643 | |
5d48a1c2 | 644 | return ret; |
3e7ee490 | 645 | } |
3e7ee490 HJ |
646 | EXPORT_SYMBOL(vmbus_child_driver_register); |
647 | ||
90c9960e | 648 | /** |
3e189519 HJ |
649 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
650 | * @driver_ctx: Pointer to driver structure you want to un-register | |
651 | * | |
652 | * @driver_ctx is of type &struct driver_context | |
653 | * | |
654 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
655 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
656 | * | |
657 | * Mainly used by Hyper-V drivers. | |
90c9960e GKH |
658 | */ |
659 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) | |
3e7ee490 | 660 | { |
90c9960e GKH |
661 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
662 | driver_ctx, driver_ctx->driver.name); | |
3e7ee490 HJ |
663 | |
664 | driver_unregister(&driver_ctx->driver); | |
665 | ||
666 | driver_ctx->driver.bus = NULL; | |
3e7ee490 | 667 | } |
3e7ee490 HJ |
668 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
669 | ||
3e189519 HJ |
670 | /* |
671 | * vmbus_child_device_create - Creates and registers a new child device | |
672 | * on the vmbus. | |
90c9960e | 673 | */ |
89733aa9 GKH |
674 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
675 | struct hv_guid *instance, | |
676 | struct vmbus_channel *channel) | |
3e7ee490 | 677 | { |
f916a34d | 678 | struct vm_device *child_device_ctx; |
3d3b5518 | 679 | struct hv_device *child_device_obj; |
3e7ee490 | 680 | |
454f18a9 | 681 | /* Allocate the new child device */ |
f916a34d | 682 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
90c9960e GKH |
683 | if (!child_device_ctx) { |
684 | DPRINT_ERR(VMBUS_DRV, | |
685 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
686 | return NULL; |
687 | } | |
688 | ||
689 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
690 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
691 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
692 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
693 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
3e7ee490 | 694 | &child_device_ctx->device, |
daaa8cc3 GKH |
695 | type->data[3], type->data[2], type->data[1], type->data[0], |
696 | type->data[5], type->data[4], type->data[7], type->data[6], | |
697 | type->data[8], type->data[9], type->data[10], type->data[11], | |
698 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
699 | instance->data[3], instance->data[2], |
700 | instance->data[1], instance->data[0], | |
701 | instance->data[5], instance->data[4], | |
702 | instance->data[7], instance->data[6], | |
703 | instance->data[8], instance->data[9], | |
704 | instance->data[10], instance->data[11], | |
705 | instance->data[12], instance->data[13], | |
706 | instance->data[14], instance->data[15]); | |
3e7ee490 HJ |
707 | |
708 | child_device_obj = &child_device_ctx->device_obj; | |
cae5b843 | 709 | child_device_obj->channel = channel; |
ca623ad3 HZ |
710 | memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid)); |
711 | memcpy(&child_device_obj->dev_instance, instance, | |
90c9960e | 712 | sizeof(struct hv_guid)); |
3e7ee490 | 713 | |
9fb5cce4 MD |
714 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
715 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); | |
3e7ee490 | 716 | |
3e7ee490 HJ |
717 | return child_device_obj; |
718 | } | |
719 | ||
3e189519 | 720 | /* |
90c9960e GKH |
721 | * vmbus_child_device_register - Register the child device on the specified bus |
722 | */ | |
98293a27 GKH |
723 | int vmbus_child_device_register(struct hv_device *root_device_obj, |
724 | struct hv_device *child_device_obj) | |
3e7ee490 | 725 | { |
90c9960e | 726 | int ret = 0; |
f916a34d HZ |
727 | struct vm_device *root_device_ctx = |
728 | to_vm_device(root_device_obj); | |
729 | struct vm_device *child_device_ctx = | |
730 | to_vm_device(child_device_obj); | |
f4888417 | 731 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 732 | |
90c9960e GKH |
733 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
734 | child_device_ctx); | |
454f18a9 | 735 | |
1bb40a25 | 736 | /* Set the device name. Otherwise, device_register() will fail. */ |
90c9960e GKH |
737 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
738 | atomic_inc_return(&device_num)); | |
3e7ee490 | 739 | |
454f18a9 | 740 | /* The new device belongs to this bus */ |
adf874cb | 741 | child_device_ctx->device.bus = &vmbus_drv.bus; /* device->dev.bus; */ |
3e7ee490 HJ |
742 | child_device_ctx->device.parent = &root_device_ctx->device; |
743 | child_device_ctx->device.release = vmbus_device_release; | |
744 | ||
90c9960e GKH |
745 | /* |
746 | * Register with the LDM. This will kick off the driver/device | |
747 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
748 | */ | |
3e7ee490 HJ |
749 | ret = device_register(&child_device_ctx->device); |
750 | ||
454f18a9 | 751 | /* vmbus_probe() error does not get propergate to device_register(). */ |
3e7ee490 HJ |
752 | ret = child_device_ctx->probe_error; |
753 | ||
754 | if (ret) | |
90c9960e GKH |
755 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
756 | &child_device_ctx->device); | |
3e7ee490 | 757 | else |
90c9960e GKH |
758 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
759 | &child_device_ctx->device); | |
3e7ee490 | 760 | |
3e7ee490 HJ |
761 | return ret; |
762 | } | |
763 | ||
3e189519 HJ |
764 | /* |
765 | * vmbus_child_device_unregister - Remove the specified child device | |
766 | * from the vmbus. | |
90c9960e | 767 | */ |
9d8bd71a | 768 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 769 | { |
f916a34d | 770 | struct vm_device *device_ctx = to_vm_device(device_obj); |
3e7ee490 | 771 | |
90c9960e GKH |
772 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
773 | &device_ctx->device); | |
3e7ee490 | 774 | |
90c9960e GKH |
775 | /* |
776 | * Kick off the process of unregistering the device. | |
777 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
778 | */ | |
3e7ee490 HJ |
779 | device_unregister(&device_ctx->device); |
780 | ||
90c9960e GKH |
781 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
782 | &device_ctx->device); | |
3e7ee490 HJ |
783 | } |
784 | ||
3e189519 | 785 | /* |
90c9960e GKH |
786 | * vmbus_uevent - add uevent for our device |
787 | * | |
788 | * This routine is invoked when a device is added or removed on the vmbus to | |
789 | * generate a uevent to udev in the userspace. The udev will then look at its | |
790 | * rule and the uevent generated here to load the appropriate driver | |
791 | */ | |
3e7ee490 HJ |
792 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
793 | { | |
f916a34d | 794 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 HJ |
795 | int ret; |
796 | ||
90c9960e GKH |
797 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
798 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
799 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
800 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], | |
801 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], | |
802 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], | |
803 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], | |
804 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], | |
805 | device_ctx->class_id.data[10], | |
806 | device_ctx->class_id.data[11], | |
807 | device_ctx->class_id.data[12], | |
808 | device_ctx->class_id.data[13], | |
809 | device_ctx->class_id.data[14], | |
810 | device_ctx->class_id.data[15]); | |
3e7ee490 | 811 | |
90c9960e GKH |
812 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
813 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
814 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
815 | device_ctx->class_id.data[3], | |
816 | device_ctx->class_id.data[2], | |
817 | device_ctx->class_id.data[1], | |
818 | device_ctx->class_id.data[0], | |
819 | device_ctx->class_id.data[5], | |
820 | device_ctx->class_id.data[4], | |
821 | device_ctx->class_id.data[7], | |
822 | device_ctx->class_id.data[6], | |
823 | device_ctx->class_id.data[8], | |
824 | device_ctx->class_id.data[9], | |
825 | device_ctx->class_id.data[10], | |
826 | device_ctx->class_id.data[11], | |
827 | device_ctx->class_id.data[12], | |
828 | device_ctx->class_id.data[13], | |
829 | device_ctx->class_id.data[14], | |
830 | device_ctx->class_id.data[15]); | |
3e7ee490 HJ |
831 | |
832 | if (ret) | |
3e7ee490 | 833 | return ret; |
3e7ee490 | 834 | |
90c9960e GKH |
835 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
836 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
837 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
838 | device_ctx->device_id.data[3], | |
839 | device_ctx->device_id.data[2], | |
840 | device_ctx->device_id.data[1], | |
841 | device_ctx->device_id.data[0], | |
842 | device_ctx->device_id.data[5], | |
843 | device_ctx->device_id.data[4], | |
844 | device_ctx->device_id.data[7], | |
845 | device_ctx->device_id.data[6], | |
846 | device_ctx->device_id.data[8], | |
847 | device_ctx->device_id.data[9], | |
848 | device_ctx->device_id.data[10], | |
849 | device_ctx->device_id.data[11], | |
850 | device_ctx->device_id.data[12], | |
851 | device_ctx->device_id.data[13], | |
852 | device_ctx->device_id.data[14], | |
853 | device_ctx->device_id.data[15]); | |
3e7ee490 | 854 | if (ret) |
3e7ee490 | 855 | return ret; |
3e7ee490 | 856 | |
3e7ee490 HJ |
857 | return 0; |
858 | } | |
859 | ||
3e189519 | 860 | /* |
90c9960e GKH |
861 | * vmbus_match - Attempt to match the specified device to the specified driver |
862 | */ | |
3e7ee490 HJ |
863 | static int vmbus_match(struct device *device, struct device_driver *driver) |
864 | { | |
90c9960e | 865 | int match = 0; |
3e7ee490 | 866 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
f916a34d | 867 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 868 | |
454f18a9 | 869 | /* We found our driver ? */ |
90c9960e GKH |
870 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
871 | sizeof(struct hv_guid)) == 0) { | |
872 | /* | |
873 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast | |
874 | * it here to access the struct hv_driver field | |
875 | */ | |
876 | struct vmbus_driver_context *vmbus_drv_ctx = | |
877 | (struct vmbus_driver_context *)driver_ctx; | |
878 | ||
ca623ad3 | 879 | device_ctx->device_obj.drv = &vmbus_drv_ctx->drv_obj; |
90c9960e GKH |
880 | DPRINT_INFO(VMBUS_DRV, |
881 | "device object (%p) set to driver object (%p)", | |
882 | &device_ctx->device_obj, | |
ca623ad3 | 883 | device_ctx->device_obj.drv); |
3e7ee490 HJ |
884 | |
885 | match = 1; | |
886 | } | |
3e7ee490 HJ |
887 | return match; |
888 | } | |
889 | ||
3e189519 | 890 | /* |
90c9960e GKH |
891 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
892 | * | |
893 | * We need a callback because we cannot invoked device_unregister() inside | |
894 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
895 | * i.e. we cannot call device_unregister() inside device_register() | |
896 | */ | |
3e7ee490 | 897 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 898 | { |
f916a34d | 899 | struct vm_device *device_ctx = (struct vm_device *)context; |
3e7ee490 | 900 | |
90c9960e GKH |
901 | /* |
902 | * Kick off the process of unregistering the device. | |
903 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
904 | */ | |
3e7ee490 HJ |
905 | device_unregister(&device_ctx->device); |
906 | ||
454f18a9 | 907 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
908 | } |
909 | ||
3e189519 | 910 | /* |
90c9960e GKH |
911 | * vmbus_probe - Add the new vmbus's child device |
912 | */ | |
3e7ee490 HJ |
913 | static int vmbus_probe(struct device *child_device) |
914 | { | |
90c9960e GKH |
915 | int ret = 0; |
916 | struct driver_context *driver_ctx = | |
917 | driver_to_driver_context(child_device->driver); | |
f916a34d HZ |
918 | struct vm_device *device_ctx = |
919 | device_to_vm_device(child_device); | |
3e7ee490 | 920 | |
454f18a9 | 921 | /* Let the specific open-source driver handles the probe if it can */ |
90c9960e | 922 | if (driver_ctx->probe) { |
3e7ee490 | 923 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
90c9960e GKH |
924 | if (ret != 0) { |
925 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
926 | "(%p) on driver %s (%d)...", | |
927 | dev_name(child_device), child_device, | |
928 | child_device->driver->name, ret); | |
929 | ||
930 | INIT_WORK(&device_ctx->probe_failed_work_item, | |
931 | vmbus_probe_failed_cb); | |
3e7ee490 HJ |
932 | schedule_work(&device_ctx->probe_failed_work_item); |
933 | } | |
90c9960e GKH |
934 | } else { |
935 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
936 | child_device->driver->name); | |
3e7ee490 HJ |
937 | ret = -1; |
938 | } | |
3e7ee490 HJ |
939 | return ret; |
940 | } | |
941 | ||
3e189519 | 942 | /* |
90c9960e GKH |
943 | * vmbus_remove - Remove a vmbus device |
944 | */ | |
3e7ee490 HJ |
945 | static int vmbus_remove(struct device *child_device) |
946 | { | |
90c9960e | 947 | int ret; |
3e7ee490 HJ |
948 | struct driver_context *driver_ctx; |
949 | ||
454f18a9 | 950 | /* Special case root bus device */ |
90c9960e GKH |
951 | if (child_device->parent == NULL) { |
952 | /* | |
953 | * No-op since it is statically defined and handle in | |
954 | * vmbus_bus_exit() | |
955 | */ | |
3e7ee490 HJ |
956 | return 0; |
957 | } | |
958 | ||
90c9960e | 959 | if (child_device->driver) { |
3e7ee490 HJ |
960 | driver_ctx = driver_to_driver_context(child_device->driver); |
961 | ||
90c9960e GKH |
962 | /* |
963 | * Let the specific open-source driver handles the removal if | |
964 | * it can | |
965 | */ | |
966 | if (driver_ctx->remove) { | |
3e7ee490 | 967 | ret = driver_ctx->remove(child_device); |
90c9960e GKH |
968 | } else { |
969 | DPRINT_ERR(VMBUS_DRV, | |
970 | "remove() method not set for driver - %s", | |
971 | child_device->driver->name); | |
3e7ee490 HJ |
972 | ret = -1; |
973 | } | |
974 | } | |
3e7ee490 | 975 | |
3e7ee490 HJ |
976 | return 0; |
977 | } | |
978 | ||
3e189519 | 979 | /* |
90c9960e GKH |
980 | * vmbus_shutdown - Shutdown a vmbus device |
981 | */ | |
3e7ee490 HJ |
982 | static void vmbus_shutdown(struct device *child_device) |
983 | { | |
984 | struct driver_context *driver_ctx; | |
985 | ||
454f18a9 | 986 | /* Special case root bus device */ |
90c9960e GKH |
987 | if (child_device->parent == NULL) { |
988 | /* | |
989 | * No-op since it is statically defined and handle in | |
990 | * vmbus_bus_exit() | |
991 | */ | |
3e7ee490 HJ |
992 | return; |
993 | } | |
994 | ||
454f18a9 | 995 | /* The device may not be attached yet */ |
83c720ea | 996 | if (!child_device->driver) |
3e7ee490 | 997 | return; |
3e7ee490 HJ |
998 | |
999 | driver_ctx = driver_to_driver_context(child_device->driver); | |
1000 | ||
454f18a9 | 1001 | /* Let the specific open-source driver handles the removal if it can */ |
3e7ee490 | 1002 | if (driver_ctx->shutdown) |
3e7ee490 | 1003 | driver_ctx->shutdown(child_device); |
3e7ee490 | 1004 | |
3e7ee490 HJ |
1005 | return; |
1006 | } | |
1007 | ||
3e189519 | 1008 | /* |
90c9960e GKH |
1009 | * vmbus_bus_release - Final callback release of the vmbus root device |
1010 | */ | |
3e7ee490 HJ |
1011 | static void vmbus_bus_release(struct device *device) |
1012 | { | |
689bf406 GKH |
1013 | /* FIXME */ |
1014 | /* Empty release functions are a bug, or a major sign | |
1015 | * of a problem design, this MUST BE FIXED! */ | |
1016 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
1017 | WARN_ON(1); | |
3e7ee490 HJ |
1018 | } |
1019 | ||
3e189519 | 1020 | /* |
90c9960e GKH |
1021 | * vmbus_device_release - Final callback release of the vmbus child device |
1022 | */ | |
3e7ee490 HJ |
1023 | static void vmbus_device_release(struct device *device) |
1024 | { | |
f916a34d | 1025 | struct vm_device *device_ctx = device_to_vm_device(device); |
3e7ee490 | 1026 | |
3e7ee490 HJ |
1027 | kfree(device_ctx); |
1028 | ||
454f18a9 | 1029 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
1030 | } |
1031 | ||
3e189519 | 1032 | /* |
90c9960e GKH |
1033 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
1034 | */ | |
3e7ee490 HJ |
1035 | static void vmbus_msg_dpc(unsigned long data) |
1036 | { | |
a69a6691 | 1037 | struct hv_driver *driver = (struct hv_driver *)data; |
3e7ee490 | 1038 | |
454f18a9 | 1039 | /* Call to bus driver to handle interrupt */ |
a69a6691 | 1040 | vmbus_on_msg_dpc(driver); |
3e7ee490 HJ |
1041 | } |
1042 | ||
3e189519 | 1043 | /* |
4a1494fc | 1044 | * vmbus_event_dpc - Tasklet routine to handle hypervisor events |
90c9960e | 1045 | */ |
3e7ee490 HJ |
1046 | static void vmbus_event_dpc(unsigned long data) |
1047 | { | |
454f18a9 | 1048 | /* Call to bus driver to handle interrupt */ |
c6977677 | 1049 | vmbus_on_event(); |
3e7ee490 HJ |
1050 | } |
1051 | ||
90c9960e | 1052 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 1053 | { |
adf874cb | 1054 | struct hv_driver *driver = &vmbus_drv.drv_obj; |
90c9960e | 1055 | int ret; |
3e7ee490 | 1056 | |
454f18a9 | 1057 | /* Call to bus driver to handle interrupt */ |
a69a6691 | 1058 | ret = vmbus_on_isr(driver); |
3e7ee490 | 1059 | |
454f18a9 | 1060 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
1061 | if (ret > 0) { |
1062 | if (test_bit(0, (unsigned long *)&ret)) | |
adf874cb | 1063 | tasklet_schedule(&vmbus_drv.msg_dpc); |
3e7ee490 | 1064 | |
90c9960e | 1065 | if (test_bit(1, (unsigned long *)&ret)) |
adf874cb | 1066 | tasklet_schedule(&vmbus_drv.event_dpc); |
3e7ee490 | 1067 | |
3e7ee490 | 1068 | return IRQ_HANDLED; |
90c9960e | 1069 | } else { |
3e7ee490 HJ |
1070 | return IRQ_NONE; |
1071 | } | |
1072 | } | |
1073 | ||
c22090fa GKH |
1074 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
1075 | { | |
1076 | .ident = "Hyper-V", | |
1077 | .matches = { | |
1078 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
1079 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
1080 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
1081 | }, | |
1082 | }, | |
1083 | { }, | |
1084 | }; | |
1085 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
1086 | ||
3e7ee490 HJ |
1087 | static int __init vmbus_init(void) |
1088 | { | |
3e7ee490 HJ |
1089 | DPRINT_INFO(VMBUS_DRV, |
1090 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
1091 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 1092 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 1093 | |
c22090fa GKH |
1094 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
1095 | return -ENODEV; | |
1096 | ||
6c884555 | 1097 | return vmbus_bus_init(); |
3e7ee490 HJ |
1098 | } |
1099 | ||
3e7ee490 HJ |
1100 | static void __exit vmbus_exit(void) |
1101 | { | |
3e7ee490 | 1102 | vmbus_bus_exit(); |
90c9960e | 1103 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1104 | } |
1105 | ||
9a775dbd GKH |
1106 | /* |
1107 | * We use a PCI table to determine if we should autoload this driver This is | |
1108 | * needed by distro tools to determine if the hyperv drivers should be | |
1109 | * installed and/or configured. We don't do anything else with the table, but | |
1110 | * it needs to be present. | |
9a775dbd | 1111 | */ |
15f0beb1 | 1112 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
1113 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
1114 | { 0 } | |
1115 | }; | |
1116 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1117 | ||
90c9960e | 1118 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1119 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1120 | module_param(vmbus_irq, int, S_IRUGO); |
1121 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1122 | |
1123 | module_init(vmbus_init); | |
1124 | module_exit(vmbus_exit); |