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" |
e3fe0bb6 | 32 | #include "hv_api.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 { |
3e7ee490 | 45 | |
90c9960e GKH |
46 | struct bus_type bus; |
47 | struct tasklet_struct msg_dpc; | |
48 | struct tasklet_struct event_dpc; | |
3e7ee490 | 49 | |
454f18a9 | 50 | /* The bus root device */ |
6bad88da | 51 | struct hv_device device_ctx; |
3e7ee490 HJ |
52 | }; |
53 | ||
3e7ee490 HJ |
54 | static int vmbus_match(struct device *device, struct device_driver *driver); |
55 | static int vmbus_probe(struct device *device); | |
56 | static int vmbus_remove(struct device *device); | |
57 | static void vmbus_shutdown(struct device *device); | |
3e7ee490 | 58 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
3e7ee490 | 59 | |
90c9960e | 60 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
61 | |
62 | static void vmbus_device_release(struct device *device); | |
63 | static void vmbus_bus_release(struct device *device); | |
64 | ||
90c9960e GKH |
65 | static ssize_t vmbus_show_device_attr(struct device *dev, |
66 | struct device_attribute *dev_attr, | |
67 | char *buf); | |
3e7ee490 | 68 | |
3e7ee490 | 69 | |
90c9960e | 70 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 71 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
72 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
73 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
74 | |
75 | static int vmbus_irq = VMBUS_IRQ; | |
76 | ||
454f18a9 | 77 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
78 | static struct device_attribute vmbus_device_attrs[] = { |
79 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
80 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
81 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
82 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
83 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
84 | ||
85 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
86 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
87 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
88 | ||
89 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
90 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
91 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
92 | ||
93 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
94 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
98 | ||
99 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
100 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
101 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
102 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR_NULL | |
105 | }; | |
3e7ee490 | 106 | |
454f18a9 | 107 | /* The one and only one */ |
adf874cb | 108 | static struct vmbus_driver_context vmbus_drv = { |
90c9960e GKH |
109 | .bus.name = "vmbus", |
110 | .bus.match = vmbus_match, | |
111 | .bus.shutdown = vmbus_shutdown, | |
112 | .bus.remove = vmbus_remove, | |
113 | .bus.probe = vmbus_probe, | |
114 | .bus.uevent = vmbus_uevent, | |
115 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
116 | }; |
117 | ||
adf874cb | 118 | static const char *driver_name = "hyperv"; |
36199a99 GKH |
119 | |
120 | /* | |
121 | * Windows vmbus does not defined this. | |
122 | * We defined this to be consistent with other devices | |
123 | */ | |
124 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
adf874cb | 125 | static const struct hv_guid device_type = { |
36199a99 GKH |
126 | .data = { |
127 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
128 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
129 | } | |
130 | }; | |
131 | ||
132 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ | |
adf874cb | 133 | static const struct hv_guid device_id = { |
36199a99 GKH |
134 | .data = { |
135 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
136 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
137 | } | |
138 | }; | |
139 | ||
adf874cb | 140 | static struct hv_device *vmbus_device; /* vmbus root device */ |
36199a99 | 141 | |
36199a99 GKH |
142 | |
143 | /* | |
646f1ea3 | 144 | * vmbus_dev_add - Callback when the root bus device is added |
36199a99 | 145 | */ |
646f1ea3 | 146 | static int vmbus_dev_add(struct hv_device *dev, void *info) |
36199a99 | 147 | { |
adf874cb | 148 | u32 *irqvector = info; |
36199a99 GKH |
149 | int ret; |
150 | ||
adf874cb | 151 | vmbus_device = dev; |
36199a99 | 152 | |
ca623ad3 HZ |
153 | memcpy(&vmbus_device->dev_type, &device_type, sizeof(struct hv_guid)); |
154 | memcpy(&vmbus_device->dev_instance, &device_id, | |
36199a99 GKH |
155 | sizeof(struct hv_guid)); |
156 | ||
157 | /* strcpy(dev->name, "vmbus"); */ | |
158 | /* SynIC setup... */ | |
159 | on_each_cpu(hv_synic_init, (void *)irqvector, 1); | |
160 | ||
161 | /* Connect to VMBus in the root partition */ | |
c6977677 | 162 | ret = vmbus_connect(); |
36199a99 GKH |
163 | |
164 | /* VmbusSendEvent(device->localPortId+1); */ | |
165 | return ret; | |
166 | } | |
167 | ||
36199a99 | 168 | |
bf6506f6 TT |
169 | struct onmessage_work_context { |
170 | struct work_struct work; | |
171 | struct hv_message msg; | |
172 | }; | |
173 | ||
174 | static void vmbus_onmessage_work(struct work_struct *work) | |
175 | { | |
176 | struct onmessage_work_context *ctx; | |
177 | ||
178 | ctx = container_of(work, struct onmessage_work_context, | |
179 | work); | |
180 | vmbus_onmessage(&ctx->msg); | |
181 | kfree(ctx); | |
182 | } | |
183 | ||
36199a99 GKH |
184 | /* |
185 | * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior | |
186 | */ | |
62c1059d | 187 | static void vmbus_on_msg_dpc(unsigned long data) |
36199a99 GKH |
188 | { |
189 | int cpu = smp_processor_id(); | |
190 | void *page_addr = hv_context.synic_message_page[cpu]; | |
191 | struct hv_message *msg = (struct hv_message *)page_addr + | |
192 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 193 | struct onmessage_work_context *ctx; |
36199a99 GKH |
194 | |
195 | while (1) { | |
196 | if (msg->header.message_type == HVMSG_NONE) { | |
197 | /* no msg */ | |
198 | break; | |
199 | } else { | |
bf6506f6 TT |
200 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
201 | if (ctx == NULL) | |
36199a99 | 202 | continue; |
bf6506f6 TT |
203 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
204 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 205 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
206 | } |
207 | ||
208 | msg->header.message_type = HVMSG_NONE; | |
209 | ||
210 | /* | |
211 | * Make sure the write to MessageType (ie set to | |
212 | * HVMSG_NONE) happens before we read the | |
213 | * MessagePending and EOMing. Otherwise, the EOMing | |
214 | * will not deliver any more messages since there is | |
215 | * no empty slot | |
216 | */ | |
217 | mb(); | |
218 | ||
219 | if (msg->header.message_flags.msg_pending) { | |
220 | /* | |
221 | * This will cause message queue rescan to | |
222 | * possibly deliver another msg from the | |
223 | * hypervisor | |
224 | */ | |
225 | wrmsrl(HV_X64_MSR_EOM, 0); | |
226 | } | |
227 | } | |
228 | } | |
229 | ||
36199a99 GKH |
230 | /* |
231 | * vmbus_on_isr - ISR routine | |
232 | */ | |
480ae58d | 233 | static int vmbus_on_isr(void) |
36199a99 GKH |
234 | { |
235 | int ret = 0; | |
236 | int cpu = smp_processor_id(); | |
237 | void *page_addr; | |
238 | struct hv_message *msg; | |
239 | union hv_synic_event_flags *event; | |
240 | ||
241 | page_addr = hv_context.synic_message_page[cpu]; | |
242 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
243 | ||
244 | /* Check if there are actual msgs to be process */ | |
245 | if (msg->header.message_type != HVMSG_NONE) { | |
246 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
247 | msg->header.message_type, | |
248 | msg->header.payload_size); | |
249 | ret |= 0x1; | |
250 | } | |
251 | ||
252 | /* TODO: Check if there are events to be process */ | |
253 | page_addr = hv_context.synic_event_page[cpu]; | |
254 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; | |
255 | ||
256 | /* Since we are a child, we only need to check bit 0 */ | |
257 | if (test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { | |
258 | DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]); | |
259 | ret |= 0x2; | |
260 | } | |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
150b19d4 GKH |
265 | static void get_channel_info(struct hv_device *device, |
266 | struct hv_device_info *info) | |
267 | { | |
268 | struct vmbus_channel_debug_info debug_info; | |
269 | ||
cae5b843 | 270 | if (!device->channel) |
150b19d4 GKH |
271 | return; |
272 | ||
cae5b843 | 273 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 274 | |
ca623ad3 HZ |
275 | info->chn_id = debug_info.relid; |
276 | info->chn_state = debug_info.state; | |
277 | memcpy(&info->chn_type, &debug_info.interfacetype, | |
150b19d4 | 278 | sizeof(struct hv_guid)); |
ca623ad3 | 279 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
150b19d4 GKH |
280 | sizeof(struct hv_guid)); |
281 | ||
ca623ad3 | 282 | info->monitor_id = debug_info.monitorid; |
150b19d4 | 283 | |
ca623ad3 HZ |
284 | info->server_monitor_pending = debug_info.servermonitor_pending; |
285 | info->server_monitor_latency = debug_info.servermonitor_latency; | |
286 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; | |
150b19d4 | 287 | |
ca623ad3 HZ |
288 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
289 | info->client_monitor_latency = debug_info.clientmonitor_latency; | |
290 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; | |
150b19d4 | 291 | |
ca623ad3 HZ |
292 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
293 | info->inbound.read_idx = debug_info.inbound.current_read_index; | |
294 | info->inbound.write_idx = debug_info.inbound.current_write_index; | |
295 | info->inbound.bytes_avail_toread = | |
296 | debug_info.inbound.bytes_avail_toread; | |
297 | info->inbound.bytes_avail_towrite = | |
82f8bd40 HZ |
298 | debug_info.inbound.bytes_avail_towrite; |
299 | ||
ca623ad3 | 300 | info->outbound.int_mask = |
82f8bd40 | 301 | debug_info.outbound.current_interrupt_mask; |
ca623ad3 HZ |
302 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
303 | info->outbound.write_idx = debug_info.outbound.current_write_index; | |
304 | info->outbound.bytes_avail_toread = | |
82f8bd40 | 305 | debug_info.outbound.bytes_avail_toread; |
ca623ad3 | 306 | info->outbound.bytes_avail_towrite = |
82f8bd40 | 307 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
308 | } |
309 | ||
3e189519 | 310 | /* |
90c9960e GKH |
311 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
312 | * | |
313 | * This is invoked when user does a | |
314 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
315 | */ | |
316 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
317 | struct device_attribute *dev_attr, | |
318 | char *buf) | |
3e7ee490 | 319 | { |
6bad88da | 320 | struct hv_device *device_ctx = device_to_hv_device(dev); |
ee3d7ddf | 321 | struct hv_device_info device_info; |
3e7ee490 | 322 | |
ee3d7ddf | 323 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 324 | |
6bad88da | 325 | get_channel_info(device_ctx, &device_info); |
3e7ee490 | 326 | |
90c9960e GKH |
327 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
328 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
329 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
330 | device_info.chn_type.data[3], |
331 | device_info.chn_type.data[2], | |
332 | device_info.chn_type.data[1], | |
333 | device_info.chn_type.data[0], | |
334 | device_info.chn_type.data[5], | |
335 | device_info.chn_type.data[4], | |
336 | device_info.chn_type.data[7], | |
337 | device_info.chn_type.data[6], | |
338 | device_info.chn_type.data[8], | |
339 | device_info.chn_type.data[9], | |
340 | device_info.chn_type.data[10], | |
341 | device_info.chn_type.data[11], | |
342 | device_info.chn_type.data[12], | |
343 | device_info.chn_type.data[13], | |
344 | device_info.chn_type.data[14], | |
345 | device_info.chn_type.data[15]); | |
90c9960e GKH |
346 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
347 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
348 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
349 | device_info.chn_instance.data[3], |
350 | device_info.chn_instance.data[2], | |
351 | device_info.chn_instance.data[1], | |
352 | device_info.chn_instance.data[0], | |
353 | device_info.chn_instance.data[5], | |
354 | device_info.chn_instance.data[4], | |
355 | device_info.chn_instance.data[7], | |
356 | device_info.chn_instance.data[6], | |
357 | device_info.chn_instance.data[8], | |
358 | device_info.chn_instance.data[9], | |
359 | device_info.chn_instance.data[10], | |
360 | device_info.chn_instance.data[11], | |
361 | device_info.chn_instance.data[12], | |
362 | device_info.chn_instance.data[13], | |
363 | device_info.chn_instance.data[14], | |
364 | device_info.chn_instance.data[15]); | |
90c9960e | 365 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
ca623ad3 | 366 | return sprintf(buf, "%d\n", device_info.chn_state); |
90c9960e | 367 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
ca623ad3 | 368 | return sprintf(buf, "%d\n", device_info.chn_id); |
90c9960e | 369 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
ca623ad3 | 370 | return sprintf(buf, "%d\n", device_info.outbound.int_mask); |
90c9960e | 371 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
ca623ad3 | 372 | return sprintf(buf, "%d\n", device_info.outbound.read_idx); |
90c9960e | 373 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
ca623ad3 | 374 | return sprintf(buf, "%d\n", device_info.outbound.write_idx); |
90c9960e GKH |
375 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
376 | return sprintf(buf, "%d\n", | |
ca623ad3 | 377 | device_info.outbound.bytes_avail_toread); |
90c9960e GKH |
378 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
379 | return sprintf(buf, "%d\n", | |
ca623ad3 | 380 | device_info.outbound.bytes_avail_towrite); |
90c9960e | 381 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
ca623ad3 | 382 | return sprintf(buf, "%d\n", device_info.inbound.int_mask); |
90c9960e | 383 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
ca623ad3 | 384 | return sprintf(buf, "%d\n", device_info.inbound.read_idx); |
90c9960e | 385 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
ca623ad3 | 386 | return sprintf(buf, "%d\n", device_info.inbound.write_idx); |
90c9960e GKH |
387 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
388 | return sprintf(buf, "%d\n", | |
ca623ad3 | 389 | device_info.inbound.bytes_avail_toread); |
90c9960e GKH |
390 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
391 | return sprintf(buf, "%d\n", | |
ca623ad3 | 392 | device_info.inbound.bytes_avail_towrite); |
90c9960e | 393 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
ca623ad3 | 394 | return sprintf(buf, "%d\n", device_info.monitor_id); |
90c9960e | 395 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
ca623ad3 | 396 | return sprintf(buf, "%d\n", device_info.server_monitor_pending); |
90c9960e | 397 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
ca623ad3 | 398 | return sprintf(buf, "%d\n", device_info.server_monitor_latency); |
90c9960e GKH |
399 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
400 | return sprintf(buf, "%d\n", | |
ca623ad3 | 401 | device_info.server_monitor_conn_id); |
90c9960e | 402 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
ca623ad3 | 403 | return sprintf(buf, "%d\n", device_info.client_monitor_pending); |
90c9960e | 404 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
ca623ad3 | 405 | return sprintf(buf, "%d\n", device_info.client_monitor_latency); |
90c9960e GKH |
406 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
407 | return sprintf(buf, "%d\n", | |
ca623ad3 | 408 | device_info.client_monitor_conn_id); |
90c9960e | 409 | } else { |
3e7ee490 HJ |
410 | return 0; |
411 | } | |
412 | } | |
413 | ||
3e189519 | 414 | /* |
90c9960e GKH |
415 | * vmbus_bus_init -Main vmbus driver initialization routine. |
416 | * | |
417 | * Here, we | |
0686e4f4 LL |
418 | * - initialize the vmbus driver context |
419 | * - setup various driver entry points | |
420 | * - invoke the vmbus hv main init routine | |
421 | * - get the irq resource | |
422 | * - invoke the vmbus to add the vmbus root device | |
423 | * - setup the vmbus root device | |
424 | * - retrieve the channel offers | |
90c9960e | 425 | */ |
6c884555 | 426 | static int vmbus_bus_init(void) |
3e7ee490 | 427 | { |
adf874cb | 428 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
6bad88da | 429 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
90c9960e GKH |
430 | int ret; |
431 | unsigned int vector; | |
3e7ee490 | 432 | |
6d26e38f GKH |
433 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
434 | HV_DRV_VERSION); | |
435 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", | |
436 | VMBUS_REVISION_NUMBER); | |
437 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
438 | VMBUS_MESSAGE_SINT); | |
439 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " | |
440 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", | |
441 | sizeof(struct vmbus_channel_packet_page_buffer), | |
442 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
443 | ||
6d26e38f GKH |
444 | |
445 | /* Hypervisor initialization...setup hypercall page..etc */ | |
446 | ret = hv_init(); | |
90c9960e | 447 | if (ret != 0) { |
6d26e38f GKH |
448 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", |
449 | ret); | |
3e7ee490 HJ |
450 | goto cleanup; |
451 | } | |
452 | ||
3e7ee490 | 453 | |
a6e4d8e3 | 454 | vmbus_drv_ctx->bus.name = driver_name; |
3e7ee490 | 455 | |
454f18a9 | 456 | /* Initialize the bus context */ |
62c1059d | 457 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_on_msg_dpc, |
a6e4d8e3 | 458 | (unsigned long)NULL); |
6de3d6aa | 459 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_on_event, |
a6e4d8e3 | 460 | (unsigned long)NULL); |
3e7ee490 | 461 | |
a6e4d8e3 | 462 | /* Now, register the bus with LDM */ |
c19fbca3 | 463 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 464 | if (ret) { |
c19fbca3 BP |
465 | ret = -1; |
466 | goto cleanup; | |
467 | } | |
3e7ee490 | 468 | |
454f18a9 | 469 | /* Get the interrupt resource */ |
90c9960e | 470 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
a6e4d8e3 | 471 | driver_name, NULL); |
3e7ee490 | 472 | |
90c9960e GKH |
473 | if (ret != 0) { |
474 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
475 | vmbus_irq); | |
3e7ee490 HJ |
476 | |
477 | bus_unregister(&vmbus_drv_ctx->bus); | |
478 | ||
479 | ret = -1; | |
480 | goto cleanup; | |
481 | } | |
3e7ee490 | 482 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
483 | |
484 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
485 | ||
a6e4d8e3 | 486 | /* Add the root device */ |
6bad88da | 487 | memset(dev_ctx, 0, sizeof(struct hv_device)); |
3e7ee490 | 488 | |
a6e4d8e3 | 489 | ret = vmbus_dev_add(dev_ctx, &vector); |
90c9960e GKH |
490 | if (ret != 0) { |
491 | DPRINT_ERR(VMBUS_DRV, | |
492 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
493 | |
494 | free_irq(vmbus_irq, NULL); | |
495 | ||
496 | bus_unregister(&vmbus_drv_ctx->bus); | |
497 | ||
498 | ret = -1; | |
499 | goto cleanup; | |
500 | } | |
454f18a9 | 501 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 502 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
3e7ee490 | 503 | |
454f18a9 | 504 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 505 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
506 | /* NULL; vmbus_remove() does not get invoked */ |
507 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 508 | |
454f18a9 | 509 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
510 | dev_ctx->device.release = vmbus_bus_release; |
511 | ||
a6e4d8e3 | 512 | /* register the root device */ |
5d48a1c2 | 513 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
514 | if (ret) { |
515 | DPRINT_ERR(VMBUS_DRV, | |
516 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
517 | |
518 | free_irq(vmbus_irq, NULL); | |
519 | bus_unregister(&vmbus_drv_ctx->bus); | |
520 | ||
521 | ret = -1; | |
522 | goto cleanup; | |
523 | } | |
524 | ||
2d6e882b | 525 | vmbus_request_offers(); |
8b5d6d3b HZ |
526 | wait_for_completion(&hv_channel_ready); |
527 | ||
3e7ee490 | 528 | cleanup: |
3e7ee490 HJ |
529 | return ret; |
530 | } | |
531 | ||
3e189519 | 532 | /* |
90c9960e GKH |
533 | * vmbus_bus_exit - Terminate the vmbus driver. |
534 | * | |
535 | * This routine is opposite of vmbus_bus_init() | |
536 | */ | |
bd1de709 | 537 | static void vmbus_bus_exit(void) |
3e7ee490 | 538 | { |
adf874cb | 539 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
3e7ee490 | 540 | |
6bad88da | 541 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
3e7ee490 | 542 | |
f51b3593 S |
543 | vmbus_release_unattached_channels(); |
544 | vmbus_disconnect(); | |
545 | on_each_cpu(hv_synic_cleanup, NULL, 1); | |
3e7ee490 | 546 | |
ece0e32f | 547 | hv_cleanup(); |
3e7ee490 | 548 | |
454f18a9 | 549 | /* Unregister the root bus device */ |
3e7ee490 HJ |
550 | device_unregister(&dev_ctx->device); |
551 | ||
552 | bus_unregister(&vmbus_drv_ctx->bus); | |
553 | ||
554 | free_irq(vmbus_irq, NULL); | |
555 | ||
556 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
557 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
558 | } |
559 | ||
3e189519 | 560 | |
90c9960e | 561 | /** |
3e189519 | 562 | * vmbus_child_driver_register() - Register a vmbus's child driver |
c643269d | 563 | * @drv: Pointer to driver structure you want to register |
3e189519 | 564 | * |
3e189519 HJ |
565 | * |
566 | * Registers the given driver with Linux through the 'driver_register()' call | |
567 | * And sets up the hyper-v vmbus handling for this driver. | |
568 | * It will return the state of the 'driver_register()' call. | |
569 | * | |
570 | * Mainly used by Hyper-V drivers. | |
90c9960e | 571 | */ |
c643269d | 572 | int vmbus_child_driver_register(struct device_driver *drv) |
3e7ee490 | 573 | { |
5d48a1c2 | 574 | int ret; |
3e7ee490 | 575 | |
90c9960e | 576 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
c643269d | 577 | drv, drv->name); |
3e7ee490 | 578 | |
454f18a9 | 579 | /* The child driver on this vmbus */ |
c643269d | 580 | drv->bus = &vmbus_drv.bus; |
3e7ee490 | 581 | |
c643269d | 582 | ret = driver_register(drv); |
3e7ee490 | 583 | |
2d6e882b | 584 | vmbus_request_offers(); |
3e7ee490 | 585 | |
5d48a1c2 | 586 | return ret; |
3e7ee490 | 587 | } |
3e7ee490 HJ |
588 | EXPORT_SYMBOL(vmbus_child_driver_register); |
589 | ||
90c9960e | 590 | /** |
3e189519 | 591 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
06de23f7 | 592 | * @drv: Pointer to driver structure you want to un-register |
3e189519 | 593 | * |
3e189519 HJ |
594 | * |
595 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
596 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
597 | * | |
598 | * Mainly used by Hyper-V drivers. | |
90c9960e | 599 | */ |
06de23f7 | 600 | void vmbus_child_driver_unregister(struct device_driver *drv) |
3e7ee490 | 601 | { |
90c9960e | 602 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
06de23f7 | 603 | drv, drv->name); |
3e7ee490 | 604 | |
06de23f7 | 605 | driver_unregister(drv); |
3e7ee490 | 606 | |
06de23f7 | 607 | drv->bus = NULL; |
3e7ee490 | 608 | } |
3e7ee490 HJ |
609 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
610 | ||
3e189519 HJ |
611 | /* |
612 | * vmbus_child_device_create - Creates and registers a new child device | |
613 | * on the vmbus. | |
90c9960e | 614 | */ |
89733aa9 GKH |
615 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
616 | struct hv_guid *instance, | |
617 | struct vmbus_channel *channel) | |
3e7ee490 | 618 | { |
3d3b5518 | 619 | struct hv_device *child_device_obj; |
3e7ee490 | 620 | |
454f18a9 | 621 | /* Allocate the new child device */ |
6bad88da S |
622 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
623 | if (!child_device_obj) { | |
90c9960e GKH |
624 | DPRINT_ERR(VMBUS_DRV, |
625 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
626 | return NULL; |
627 | } | |
628 | ||
629 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
630 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
631 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
632 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
633 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
6bad88da | 634 | &child_device_obj->device, |
daaa8cc3 GKH |
635 | type->data[3], type->data[2], type->data[1], type->data[0], |
636 | type->data[5], type->data[4], type->data[7], type->data[6], | |
637 | type->data[8], type->data[9], type->data[10], type->data[11], | |
638 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
639 | instance->data[3], instance->data[2], |
640 | instance->data[1], instance->data[0], | |
641 | instance->data[5], instance->data[4], | |
642 | instance->data[7], instance->data[6], | |
643 | instance->data[8], instance->data[9], | |
644 | instance->data[10], instance->data[11], | |
645 | instance->data[12], instance->data[13], | |
646 | instance->data[14], instance->data[15]); | |
3e7ee490 | 647 | |
cae5b843 | 648 | child_device_obj->channel = channel; |
ca623ad3 HZ |
649 | memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid)); |
650 | memcpy(&child_device_obj->dev_instance, instance, | |
90c9960e | 651 | sizeof(struct hv_guid)); |
3e7ee490 | 652 | |
3e7ee490 | 653 | |
3e7ee490 HJ |
654 | return child_device_obj; |
655 | } | |
656 | ||
3e189519 | 657 | /* |
e13a0b5a | 658 | * vmbus_child_device_register - Register the child device |
90c9960e | 659 | */ |
3ca07cb0 | 660 | int vmbus_child_device_register(struct hv_device *child_device_obj) |
3e7ee490 | 661 | { |
90c9960e | 662 | int ret = 0; |
6bad88da | 663 | |
f4888417 | 664 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 665 | |
90c9960e | 666 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
6bad88da | 667 | child_device_obj); |
454f18a9 | 668 | |
1bb40a25 | 669 | /* Set the device name. Otherwise, device_register() will fail. */ |
6bad88da | 670 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
90c9960e | 671 | atomic_inc_return(&device_num)); |
3e7ee490 | 672 | |
454f18a9 | 673 | /* The new device belongs to this bus */ |
6bad88da | 674 | child_device_obj->device.bus = &vmbus_drv.bus; /* device->dev.bus; */ |
3ca07cb0 | 675 | child_device_obj->device.parent = &vmbus_device->device; |
6bad88da | 676 | child_device_obj->device.release = vmbus_device_release; |
3e7ee490 | 677 | |
90c9960e GKH |
678 | /* |
679 | * Register with the LDM. This will kick off the driver/device | |
680 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
681 | */ | |
6bad88da | 682 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 683 | |
454f18a9 | 684 | /* vmbus_probe() error does not get propergate to device_register(). */ |
6bad88da | 685 | ret = child_device_obj->probe_error; |
3e7ee490 HJ |
686 | |
687 | if (ret) | |
90c9960e | 688 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
6bad88da | 689 | &child_device_obj->device); |
3e7ee490 | 690 | else |
90c9960e | 691 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
6bad88da | 692 | &child_device_obj->device); |
3e7ee490 | 693 | |
3e7ee490 HJ |
694 | return ret; |
695 | } | |
696 | ||
3e189519 HJ |
697 | /* |
698 | * vmbus_child_device_unregister - Remove the specified child device | |
699 | * from the vmbus. | |
90c9960e | 700 | */ |
9d8bd71a | 701 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 702 | { |
3e7ee490 | 703 | |
90c9960e | 704 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
6bad88da | 705 | &device_obj->device); |
3e7ee490 | 706 | |
90c9960e GKH |
707 | /* |
708 | * Kick off the process of unregistering the device. | |
709 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
710 | */ | |
6bad88da | 711 | device_unregister(&device_obj->device); |
3e7ee490 | 712 | |
90c9960e | 713 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
6bad88da | 714 | &device_obj->device); |
3e7ee490 HJ |
715 | } |
716 | ||
3e189519 | 717 | /* |
90c9960e GKH |
718 | * vmbus_uevent - add uevent for our device |
719 | * | |
720 | * This routine is invoked when a device is added or removed on the vmbus to | |
721 | * generate a uevent to udev in the userspace. The udev will then look at its | |
722 | * rule and the uevent generated here to load the appropriate driver | |
723 | */ | |
3e7ee490 HJ |
724 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
725 | { | |
6bad88da | 726 | struct hv_device *dev = device_to_hv_device(device); |
3e7ee490 HJ |
727 | int ret; |
728 | ||
90c9960e GKH |
729 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
730 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
731 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
732 | dev->dev_type.data[3], dev->dev_type.data[2], |
733 | dev->dev_type.data[1], dev->dev_type.data[0], | |
734 | dev->dev_type.data[5], dev->dev_type.data[4], | |
735 | dev->dev_type.data[7], dev->dev_type.data[6], | |
736 | dev->dev_type.data[8], dev->dev_type.data[9], | |
737 | dev->dev_type.data[10], | |
738 | dev->dev_type.data[11], | |
739 | dev->dev_type.data[12], | |
740 | dev->dev_type.data[13], | |
741 | dev->dev_type.data[14], | |
742 | dev->dev_type.data[15]); | |
3e7ee490 | 743 | |
90c9960e GKH |
744 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
745 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
746 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
747 | dev->dev_type.data[3], |
748 | dev->dev_type.data[2], | |
749 | dev->dev_type.data[1], | |
750 | dev->dev_type.data[0], | |
751 | dev->dev_type.data[5], | |
752 | dev->dev_type.data[4], | |
753 | dev->dev_type.data[7], | |
754 | dev->dev_type.data[6], | |
755 | dev->dev_type.data[8], | |
756 | dev->dev_type.data[9], | |
757 | dev->dev_type.data[10], | |
758 | dev->dev_type.data[11], | |
759 | dev->dev_type.data[12], | |
760 | dev->dev_type.data[13], | |
761 | dev->dev_type.data[14], | |
762 | dev->dev_type.data[15]); | |
3e7ee490 HJ |
763 | |
764 | if (ret) | |
3e7ee490 | 765 | return ret; |
3e7ee490 | 766 | |
90c9960e GKH |
767 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
768 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
769 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
d5889771 S |
770 | dev->dev_instance.data[3], |
771 | dev->dev_instance.data[2], | |
772 | dev->dev_instance.data[1], | |
773 | dev->dev_instance.data[0], | |
774 | dev->dev_instance.data[5], | |
775 | dev->dev_instance.data[4], | |
776 | dev->dev_instance.data[7], | |
777 | dev->dev_instance.data[6], | |
778 | dev->dev_instance.data[8], | |
779 | dev->dev_instance.data[9], | |
780 | dev->dev_instance.data[10], | |
781 | dev->dev_instance.data[11], | |
782 | dev->dev_instance.data[12], | |
783 | dev->dev_instance.data[13], | |
784 | dev->dev_instance.data[14], | |
785 | dev->dev_instance.data[15]); | |
3e7ee490 | 786 | if (ret) |
3e7ee490 | 787 | return ret; |
3e7ee490 | 788 | |
3e7ee490 HJ |
789 | return 0; |
790 | } | |
791 | ||
3e189519 | 792 | /* |
90c9960e GKH |
793 | * vmbus_match - Attempt to match the specified device to the specified driver |
794 | */ | |
3e7ee490 HJ |
795 | static int vmbus_match(struct device *device, struct device_driver *driver) |
796 | { | |
90c9960e | 797 | int match = 0; |
150f9398 | 798 | struct hv_driver *drv = drv_to_hv_drv(driver); |
6bad88da | 799 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 800 | |
454f18a9 | 801 | /* We found our driver ? */ |
6bad88da | 802 | if (memcmp(&device_ctx->dev_type, &drv->dev_type, |
90c9960e | 803 | sizeof(struct hv_guid)) == 0) { |
90c9960e | 804 | |
6bad88da | 805 | device_ctx->drv = drv->priv; |
90c9960e GKH |
806 | DPRINT_INFO(VMBUS_DRV, |
807 | "device object (%p) set to driver object (%p)", | |
6bad88da S |
808 | &device_ctx, |
809 | device_ctx->drv); | |
3e7ee490 HJ |
810 | |
811 | match = 1; | |
812 | } | |
3e7ee490 HJ |
813 | return match; |
814 | } | |
815 | ||
3e189519 | 816 | /* |
90c9960e GKH |
817 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
818 | * | |
819 | * We need a callback because we cannot invoked device_unregister() inside | |
820 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
821 | * i.e. we cannot call device_unregister() inside device_register() | |
822 | */ | |
3e7ee490 | 823 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 824 | { |
6bad88da | 825 | struct hv_device *device_ctx = (struct hv_device *)context; |
3e7ee490 | 826 | |
90c9960e GKH |
827 | /* |
828 | * Kick off the process of unregistering the device. | |
829 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
830 | */ | |
3e7ee490 HJ |
831 | device_unregister(&device_ctx->device); |
832 | ||
454f18a9 | 833 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
834 | } |
835 | ||
3e189519 | 836 | /* |
90c9960e GKH |
837 | * vmbus_probe - Add the new vmbus's child device |
838 | */ | |
3e7ee490 HJ |
839 | static int vmbus_probe(struct device *child_device) |
840 | { | |
90c9960e | 841 | int ret = 0; |
150f9398 S |
842 | struct hv_driver *drv = |
843 | drv_to_hv_drv(child_device->driver); | |
6bad88da | 844 | struct hv_device *dev = device_to_hv_device(child_device); |
3e7ee490 | 845 | |
454f18a9 | 846 | /* Let the specific open-source driver handles the probe if it can */ |
150f9398 | 847 | if (drv->driver.probe) { |
6bad88da | 848 | ret = dev->probe_error = |
150f9398 | 849 | drv->driver.probe(child_device); |
90c9960e GKH |
850 | if (ret != 0) { |
851 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
852 | "(%p) on driver %s (%d)...", | |
853 | dev_name(child_device), child_device, | |
854 | child_device->driver->name, ret); | |
855 | ||
a3c7fe9a | 856 | INIT_WORK(&dev->probe_failed_work_item, |
90c9960e | 857 | vmbus_probe_failed_cb); |
a3c7fe9a | 858 | schedule_work(&dev->probe_failed_work_item); |
3e7ee490 | 859 | } |
90c9960e GKH |
860 | } else { |
861 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
862 | child_device->driver->name); | |
3e7ee490 HJ |
863 | ret = -1; |
864 | } | |
3e7ee490 HJ |
865 | return ret; |
866 | } | |
867 | ||
3e189519 | 868 | /* |
90c9960e GKH |
869 | * vmbus_remove - Remove a vmbus device |
870 | */ | |
3e7ee490 HJ |
871 | static int vmbus_remove(struct device *child_device) |
872 | { | |
90c9960e | 873 | int ret; |
150f9398 | 874 | struct hv_driver *drv; |
3e7ee490 | 875 | |
454f18a9 | 876 | /* Special case root bus device */ |
90c9960e GKH |
877 | if (child_device->parent == NULL) { |
878 | /* | |
879 | * No-op since it is statically defined and handle in | |
880 | * vmbus_bus_exit() | |
881 | */ | |
3e7ee490 HJ |
882 | return 0; |
883 | } | |
884 | ||
90c9960e | 885 | if (child_device->driver) { |
150f9398 | 886 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 887 | |
90c9960e GKH |
888 | /* |
889 | * Let the specific open-source driver handles the removal if | |
890 | * it can | |
891 | */ | |
150f9398 S |
892 | if (drv->driver.remove) { |
893 | ret = drv->driver.remove(child_device); | |
90c9960e GKH |
894 | } else { |
895 | DPRINT_ERR(VMBUS_DRV, | |
896 | "remove() method not set for driver - %s", | |
897 | child_device->driver->name); | |
3e7ee490 HJ |
898 | ret = -1; |
899 | } | |
900 | } | |
3e7ee490 | 901 | |
3e7ee490 HJ |
902 | return 0; |
903 | } | |
904 | ||
3e189519 | 905 | /* |
90c9960e GKH |
906 | * vmbus_shutdown - Shutdown a vmbus device |
907 | */ | |
3e7ee490 HJ |
908 | static void vmbus_shutdown(struct device *child_device) |
909 | { | |
150f9398 | 910 | struct hv_driver *drv; |
3e7ee490 | 911 | |
454f18a9 | 912 | /* Special case root bus device */ |
90c9960e GKH |
913 | if (child_device->parent == NULL) { |
914 | /* | |
915 | * No-op since it is statically defined and handle in | |
916 | * vmbus_bus_exit() | |
917 | */ | |
3e7ee490 HJ |
918 | return; |
919 | } | |
920 | ||
454f18a9 | 921 | /* The device may not be attached yet */ |
83c720ea | 922 | if (!child_device->driver) |
3e7ee490 | 923 | return; |
3e7ee490 | 924 | |
150f9398 | 925 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 926 | |
454f18a9 | 927 | /* Let the specific open-source driver handles the removal if it can */ |
150f9398 S |
928 | if (drv->driver.shutdown) |
929 | drv->driver.shutdown(child_device); | |
3e7ee490 | 930 | |
3e7ee490 HJ |
931 | return; |
932 | } | |
933 | ||
3e189519 | 934 | /* |
90c9960e GKH |
935 | * vmbus_bus_release - Final callback release of the vmbus root device |
936 | */ | |
3e7ee490 HJ |
937 | static void vmbus_bus_release(struct device *device) |
938 | { | |
689bf406 GKH |
939 | /* FIXME */ |
940 | /* Empty release functions are a bug, or a major sign | |
941 | * of a problem design, this MUST BE FIXED! */ | |
942 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
943 | WARN_ON(1); | |
3e7ee490 HJ |
944 | } |
945 | ||
3e189519 | 946 | /* |
90c9960e GKH |
947 | * vmbus_device_release - Final callback release of the vmbus child device |
948 | */ | |
3e7ee490 HJ |
949 | static void vmbus_device_release(struct device *device) |
950 | { | |
6bad88da | 951 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 952 | |
3e7ee490 HJ |
953 | kfree(device_ctx); |
954 | ||
454f18a9 | 955 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
956 | } |
957 | ||
3e7ee490 | 958 | |
3e7ee490 | 959 | |
90c9960e | 960 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 961 | { |
90c9960e | 962 | int ret; |
3e7ee490 | 963 | |
480ae58d | 964 | ret = vmbus_on_isr(); |
3e7ee490 | 965 | |
454f18a9 | 966 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
967 | if (ret > 0) { |
968 | if (test_bit(0, (unsigned long *)&ret)) | |
adf874cb | 969 | tasklet_schedule(&vmbus_drv.msg_dpc); |
3e7ee490 | 970 | |
90c9960e | 971 | if (test_bit(1, (unsigned long *)&ret)) |
adf874cb | 972 | tasklet_schedule(&vmbus_drv.event_dpc); |
3e7ee490 | 973 | |
3e7ee490 | 974 | return IRQ_HANDLED; |
90c9960e | 975 | } else { |
3e7ee490 HJ |
976 | return IRQ_NONE; |
977 | } | |
978 | } | |
979 | ||
c22090fa GKH |
980 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
981 | { | |
982 | .ident = "Hyper-V", | |
983 | .matches = { | |
984 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
985 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
986 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
987 | }, | |
988 | }, | |
989 | { }, | |
990 | }; | |
991 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
992 | ||
3e7ee490 HJ |
993 | static int __init vmbus_init(void) |
994 | { | |
3e7ee490 HJ |
995 | DPRINT_INFO(VMBUS_DRV, |
996 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
997 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 998 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 999 | |
c22090fa GKH |
1000 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
1001 | return -ENODEV; | |
1002 | ||
6c884555 | 1003 | return vmbus_bus_init(); |
3e7ee490 HJ |
1004 | } |
1005 | ||
3e7ee490 HJ |
1006 | static void __exit vmbus_exit(void) |
1007 | { | |
3e7ee490 | 1008 | vmbus_bus_exit(); |
90c9960e | 1009 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1010 | } |
1011 | ||
9a775dbd GKH |
1012 | /* |
1013 | * We use a PCI table to determine if we should autoload this driver This is | |
1014 | * needed by distro tools to determine if the hyperv drivers should be | |
1015 | * installed and/or configured. We don't do anything else with the table, but | |
1016 | * it needs to be present. | |
9a775dbd | 1017 | */ |
15f0beb1 | 1018 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
1019 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
1020 | { 0 } | |
1021 | }; | |
1022 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1023 | ||
90c9960e | 1024 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1025 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1026 | module_param(vmbus_irq, int, S_IRUGO); |
1027 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1028 | |
1029 | module_init(vmbus_init); | |
1030 | module_exit(vmbus_exit); |