]>
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 GKH |
141 | |
142 | /* | |
646f1ea3 | 143 | * vmbus_child_dev_add - Registers the child device with the vmbus |
36199a99 | 144 | */ |
646f1ea3 | 145 | int vmbus_child_dev_add(struct hv_device *child_dev) |
36199a99 | 146 | { |
adf874cb | 147 | return vmbus_child_device_register(vmbus_device, child_dev); |
36199a99 GKH |
148 | } |
149 | ||
150 | /* | |
646f1ea3 | 151 | * vmbus_dev_add - Callback when the root bus device is added |
36199a99 | 152 | */ |
646f1ea3 | 153 | static int vmbus_dev_add(struct hv_device *dev, void *info) |
36199a99 | 154 | { |
adf874cb | 155 | u32 *irqvector = info; |
36199a99 GKH |
156 | int ret; |
157 | ||
adf874cb | 158 | vmbus_device = dev; |
36199a99 | 159 | |
ca623ad3 HZ |
160 | memcpy(&vmbus_device->dev_type, &device_type, sizeof(struct hv_guid)); |
161 | memcpy(&vmbus_device->dev_instance, &device_id, | |
36199a99 GKH |
162 | sizeof(struct hv_guid)); |
163 | ||
164 | /* strcpy(dev->name, "vmbus"); */ | |
165 | /* SynIC setup... */ | |
166 | on_each_cpu(hv_synic_init, (void *)irqvector, 1); | |
167 | ||
168 | /* Connect to VMBus in the root partition */ | |
c6977677 | 169 | ret = vmbus_connect(); |
36199a99 GKH |
170 | |
171 | /* VmbusSendEvent(device->localPortId+1); */ | |
172 | return ret; | |
173 | } | |
174 | ||
36199a99 | 175 | |
bf6506f6 TT |
176 | struct onmessage_work_context { |
177 | struct work_struct work; | |
178 | struct hv_message msg; | |
179 | }; | |
180 | ||
181 | static void vmbus_onmessage_work(struct work_struct *work) | |
182 | { | |
183 | struct onmessage_work_context *ctx; | |
184 | ||
185 | ctx = container_of(work, struct onmessage_work_context, | |
186 | work); | |
187 | vmbus_onmessage(&ctx->msg); | |
188 | kfree(ctx); | |
189 | } | |
190 | ||
36199a99 GKH |
191 | /* |
192 | * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior | |
193 | */ | |
62c1059d | 194 | static void vmbus_on_msg_dpc(unsigned long data) |
36199a99 GKH |
195 | { |
196 | int cpu = smp_processor_id(); | |
197 | void *page_addr = hv_context.synic_message_page[cpu]; | |
198 | struct hv_message *msg = (struct hv_message *)page_addr + | |
199 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 200 | struct onmessage_work_context *ctx; |
36199a99 GKH |
201 | |
202 | while (1) { | |
203 | if (msg->header.message_type == HVMSG_NONE) { | |
204 | /* no msg */ | |
205 | break; | |
206 | } else { | |
bf6506f6 TT |
207 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
208 | if (ctx == NULL) | |
36199a99 | 209 | continue; |
bf6506f6 TT |
210 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
211 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 212 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
213 | } |
214 | ||
215 | msg->header.message_type = HVMSG_NONE; | |
216 | ||
217 | /* | |
218 | * Make sure the write to MessageType (ie set to | |
219 | * HVMSG_NONE) happens before we read the | |
220 | * MessagePending and EOMing. Otherwise, the EOMing | |
221 | * will not deliver any more messages since there is | |
222 | * no empty slot | |
223 | */ | |
224 | mb(); | |
225 | ||
226 | if (msg->header.message_flags.msg_pending) { | |
227 | /* | |
228 | * This will cause message queue rescan to | |
229 | * possibly deliver another msg from the | |
230 | * hypervisor | |
231 | */ | |
232 | wrmsrl(HV_X64_MSR_EOM, 0); | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
36199a99 GKH |
237 | /* |
238 | * vmbus_on_isr - ISR routine | |
239 | */ | |
480ae58d | 240 | static int vmbus_on_isr(void) |
36199a99 GKH |
241 | { |
242 | int ret = 0; | |
243 | int cpu = smp_processor_id(); | |
244 | void *page_addr; | |
245 | struct hv_message *msg; | |
246 | union hv_synic_event_flags *event; | |
247 | ||
248 | page_addr = hv_context.synic_message_page[cpu]; | |
249 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
250 | ||
251 | /* Check if there are actual msgs to be process */ | |
252 | if (msg->header.message_type != HVMSG_NONE) { | |
253 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
254 | msg->header.message_type, | |
255 | msg->header.payload_size); | |
256 | ret |= 0x1; | |
257 | } | |
258 | ||
259 | /* TODO: Check if there are events to be process */ | |
260 | page_addr = hv_context.synic_event_page[cpu]; | |
261 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; | |
262 | ||
263 | /* Since we are a child, we only need to check bit 0 */ | |
264 | if (test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { | |
265 | DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]); | |
266 | ret |= 0x2; | |
267 | } | |
268 | ||
269 | return ret; | |
270 | } | |
271 | ||
150b19d4 GKH |
272 | static void get_channel_info(struct hv_device *device, |
273 | struct hv_device_info *info) | |
274 | { | |
275 | struct vmbus_channel_debug_info debug_info; | |
276 | ||
cae5b843 | 277 | if (!device->channel) |
150b19d4 GKH |
278 | return; |
279 | ||
cae5b843 | 280 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 281 | |
ca623ad3 HZ |
282 | info->chn_id = debug_info.relid; |
283 | info->chn_state = debug_info.state; | |
284 | memcpy(&info->chn_type, &debug_info.interfacetype, | |
150b19d4 | 285 | sizeof(struct hv_guid)); |
ca623ad3 | 286 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
150b19d4 GKH |
287 | sizeof(struct hv_guid)); |
288 | ||
ca623ad3 | 289 | info->monitor_id = debug_info.monitorid; |
150b19d4 | 290 | |
ca623ad3 HZ |
291 | info->server_monitor_pending = debug_info.servermonitor_pending; |
292 | info->server_monitor_latency = debug_info.servermonitor_latency; | |
293 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; | |
150b19d4 | 294 | |
ca623ad3 HZ |
295 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
296 | info->client_monitor_latency = debug_info.clientmonitor_latency; | |
297 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; | |
150b19d4 | 298 | |
ca623ad3 HZ |
299 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
300 | info->inbound.read_idx = debug_info.inbound.current_read_index; | |
301 | info->inbound.write_idx = debug_info.inbound.current_write_index; | |
302 | info->inbound.bytes_avail_toread = | |
303 | debug_info.inbound.bytes_avail_toread; | |
304 | info->inbound.bytes_avail_towrite = | |
82f8bd40 HZ |
305 | debug_info.inbound.bytes_avail_towrite; |
306 | ||
ca623ad3 | 307 | info->outbound.int_mask = |
82f8bd40 | 308 | debug_info.outbound.current_interrupt_mask; |
ca623ad3 HZ |
309 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
310 | info->outbound.write_idx = debug_info.outbound.current_write_index; | |
311 | info->outbound.bytes_avail_toread = | |
82f8bd40 | 312 | debug_info.outbound.bytes_avail_toread; |
ca623ad3 | 313 | info->outbound.bytes_avail_towrite = |
82f8bd40 | 314 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
315 | } |
316 | ||
3e189519 | 317 | /* |
90c9960e GKH |
318 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
319 | * | |
320 | * This is invoked when user does a | |
321 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
322 | */ | |
323 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
324 | struct device_attribute *dev_attr, | |
325 | char *buf) | |
3e7ee490 | 326 | { |
6bad88da | 327 | struct hv_device *device_ctx = device_to_hv_device(dev); |
ee3d7ddf | 328 | struct hv_device_info device_info; |
3e7ee490 | 329 | |
ee3d7ddf | 330 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 331 | |
6bad88da | 332 | get_channel_info(device_ctx, &device_info); |
3e7ee490 | 333 | |
90c9960e GKH |
334 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
335 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
336 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
337 | device_info.chn_type.data[3], |
338 | device_info.chn_type.data[2], | |
339 | device_info.chn_type.data[1], | |
340 | device_info.chn_type.data[0], | |
341 | device_info.chn_type.data[5], | |
342 | device_info.chn_type.data[4], | |
343 | device_info.chn_type.data[7], | |
344 | device_info.chn_type.data[6], | |
345 | device_info.chn_type.data[8], | |
346 | device_info.chn_type.data[9], | |
347 | device_info.chn_type.data[10], | |
348 | device_info.chn_type.data[11], | |
349 | device_info.chn_type.data[12], | |
350 | device_info.chn_type.data[13], | |
351 | device_info.chn_type.data[14], | |
352 | device_info.chn_type.data[15]); | |
90c9960e GKH |
353 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
354 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
355 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
356 | device_info.chn_instance.data[3], |
357 | device_info.chn_instance.data[2], | |
358 | device_info.chn_instance.data[1], | |
359 | device_info.chn_instance.data[0], | |
360 | device_info.chn_instance.data[5], | |
361 | device_info.chn_instance.data[4], | |
362 | device_info.chn_instance.data[7], | |
363 | device_info.chn_instance.data[6], | |
364 | device_info.chn_instance.data[8], | |
365 | device_info.chn_instance.data[9], | |
366 | device_info.chn_instance.data[10], | |
367 | device_info.chn_instance.data[11], | |
368 | device_info.chn_instance.data[12], | |
369 | device_info.chn_instance.data[13], | |
370 | device_info.chn_instance.data[14], | |
371 | device_info.chn_instance.data[15]); | |
90c9960e | 372 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
ca623ad3 | 373 | return sprintf(buf, "%d\n", device_info.chn_state); |
90c9960e | 374 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
ca623ad3 | 375 | return sprintf(buf, "%d\n", device_info.chn_id); |
90c9960e | 376 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
ca623ad3 | 377 | return sprintf(buf, "%d\n", device_info.outbound.int_mask); |
90c9960e | 378 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
ca623ad3 | 379 | return sprintf(buf, "%d\n", device_info.outbound.read_idx); |
90c9960e | 380 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
ca623ad3 | 381 | return sprintf(buf, "%d\n", device_info.outbound.write_idx); |
90c9960e GKH |
382 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
383 | return sprintf(buf, "%d\n", | |
ca623ad3 | 384 | device_info.outbound.bytes_avail_toread); |
90c9960e GKH |
385 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
386 | return sprintf(buf, "%d\n", | |
ca623ad3 | 387 | device_info.outbound.bytes_avail_towrite); |
90c9960e | 388 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
ca623ad3 | 389 | return sprintf(buf, "%d\n", device_info.inbound.int_mask); |
90c9960e | 390 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
ca623ad3 | 391 | return sprintf(buf, "%d\n", device_info.inbound.read_idx); |
90c9960e | 392 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
ca623ad3 | 393 | return sprintf(buf, "%d\n", device_info.inbound.write_idx); |
90c9960e GKH |
394 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
395 | return sprintf(buf, "%d\n", | |
ca623ad3 | 396 | device_info.inbound.bytes_avail_toread); |
90c9960e GKH |
397 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
398 | return sprintf(buf, "%d\n", | |
ca623ad3 | 399 | device_info.inbound.bytes_avail_towrite); |
90c9960e | 400 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
ca623ad3 | 401 | return sprintf(buf, "%d\n", device_info.monitor_id); |
90c9960e | 402 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
ca623ad3 | 403 | return sprintf(buf, "%d\n", device_info.server_monitor_pending); |
90c9960e | 404 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
ca623ad3 | 405 | return sprintf(buf, "%d\n", device_info.server_monitor_latency); |
90c9960e GKH |
406 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
407 | return sprintf(buf, "%d\n", | |
ca623ad3 | 408 | device_info.server_monitor_conn_id); |
90c9960e | 409 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
ca623ad3 | 410 | return sprintf(buf, "%d\n", device_info.client_monitor_pending); |
90c9960e | 411 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
ca623ad3 | 412 | return sprintf(buf, "%d\n", device_info.client_monitor_latency); |
90c9960e GKH |
413 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
414 | return sprintf(buf, "%d\n", | |
ca623ad3 | 415 | device_info.client_monitor_conn_id); |
90c9960e | 416 | } else { |
3e7ee490 HJ |
417 | return 0; |
418 | } | |
419 | } | |
420 | ||
3e189519 | 421 | /* |
90c9960e GKH |
422 | * vmbus_bus_init -Main vmbus driver initialization routine. |
423 | * | |
424 | * Here, we | |
0686e4f4 LL |
425 | * - initialize the vmbus driver context |
426 | * - setup various driver entry points | |
427 | * - invoke the vmbus hv main init routine | |
428 | * - get the irq resource | |
429 | * - invoke the vmbus to add the vmbus root device | |
430 | * - setup the vmbus root device | |
431 | * - retrieve the channel offers | |
90c9960e | 432 | */ |
6c884555 | 433 | static int vmbus_bus_init(void) |
3e7ee490 | 434 | { |
adf874cb | 435 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
6bad88da | 436 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
90c9960e GKH |
437 | int ret; |
438 | unsigned int vector; | |
3e7ee490 | 439 | |
6d26e38f GKH |
440 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
441 | HV_DRV_VERSION); | |
442 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", | |
443 | VMBUS_REVISION_NUMBER); | |
444 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
445 | VMBUS_MESSAGE_SINT); | |
446 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " | |
447 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", | |
448 | sizeof(struct vmbus_channel_packet_page_buffer), | |
449 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
450 | ||
6d26e38f GKH |
451 | |
452 | /* Hypervisor initialization...setup hypercall page..etc */ | |
453 | ret = hv_init(); | |
90c9960e | 454 | if (ret != 0) { |
6d26e38f GKH |
455 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", |
456 | ret); | |
3e7ee490 HJ |
457 | goto cleanup; |
458 | } | |
459 | ||
3e7ee490 | 460 | |
a6e4d8e3 | 461 | vmbus_drv_ctx->bus.name = driver_name; |
3e7ee490 | 462 | |
454f18a9 | 463 | /* Initialize the bus context */ |
62c1059d | 464 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_on_msg_dpc, |
a6e4d8e3 | 465 | (unsigned long)NULL); |
6de3d6aa | 466 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_on_event, |
a6e4d8e3 | 467 | (unsigned long)NULL); |
3e7ee490 | 468 | |
a6e4d8e3 | 469 | /* Now, register the bus with LDM */ |
c19fbca3 | 470 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 471 | if (ret) { |
c19fbca3 BP |
472 | ret = -1; |
473 | goto cleanup; | |
474 | } | |
3e7ee490 | 475 | |
454f18a9 | 476 | /* Get the interrupt resource */ |
90c9960e | 477 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
a6e4d8e3 | 478 | driver_name, NULL); |
3e7ee490 | 479 | |
90c9960e GKH |
480 | if (ret != 0) { |
481 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
482 | vmbus_irq); | |
3e7ee490 HJ |
483 | |
484 | bus_unregister(&vmbus_drv_ctx->bus); | |
485 | ||
486 | ret = -1; | |
487 | goto cleanup; | |
488 | } | |
3e7ee490 | 489 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
490 | |
491 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
492 | ||
a6e4d8e3 | 493 | /* Add the root device */ |
6bad88da | 494 | memset(dev_ctx, 0, sizeof(struct hv_device)); |
3e7ee490 | 495 | |
a6e4d8e3 | 496 | ret = vmbus_dev_add(dev_ctx, &vector); |
90c9960e GKH |
497 | if (ret != 0) { |
498 | DPRINT_ERR(VMBUS_DRV, | |
499 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
500 | |
501 | free_irq(vmbus_irq, NULL); | |
502 | ||
503 | bus_unregister(&vmbus_drv_ctx->bus); | |
504 | ||
505 | ret = -1; | |
506 | goto cleanup; | |
507 | } | |
454f18a9 | 508 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 509 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
3e7ee490 | 510 | |
454f18a9 | 511 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 512 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
513 | /* NULL; vmbus_remove() does not get invoked */ |
514 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 515 | |
454f18a9 | 516 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
517 | dev_ctx->device.release = vmbus_bus_release; |
518 | ||
a6e4d8e3 | 519 | /* register the root device */ |
5d48a1c2 | 520 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
521 | if (ret) { |
522 | DPRINT_ERR(VMBUS_DRV, | |
523 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
524 | |
525 | free_irq(vmbus_irq, NULL); | |
526 | bus_unregister(&vmbus_drv_ctx->bus); | |
527 | ||
528 | ret = -1; | |
529 | goto cleanup; | |
530 | } | |
531 | ||
2d6e882b | 532 | vmbus_request_offers(); |
8b5d6d3b HZ |
533 | wait_for_completion(&hv_channel_ready); |
534 | ||
3e7ee490 | 535 | cleanup: |
3e7ee490 HJ |
536 | return ret; |
537 | } | |
538 | ||
3e189519 | 539 | /* |
90c9960e GKH |
540 | * vmbus_bus_exit - Terminate the vmbus driver. |
541 | * | |
542 | * This routine is opposite of vmbus_bus_init() | |
543 | */ | |
bd1de709 | 544 | static void vmbus_bus_exit(void) |
3e7ee490 | 545 | { |
adf874cb | 546 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
3e7ee490 | 547 | |
6bad88da | 548 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
3e7ee490 | 549 | |
f51b3593 S |
550 | vmbus_release_unattached_channels(); |
551 | vmbus_disconnect(); | |
552 | on_each_cpu(hv_synic_cleanup, NULL, 1); | |
3e7ee490 | 553 | |
ece0e32f | 554 | hv_cleanup(); |
3e7ee490 | 555 | |
454f18a9 | 556 | /* Unregister the root bus device */ |
3e7ee490 HJ |
557 | device_unregister(&dev_ctx->device); |
558 | ||
559 | bus_unregister(&vmbus_drv_ctx->bus); | |
560 | ||
561 | free_irq(vmbus_irq, NULL); | |
562 | ||
563 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
564 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
565 | } |
566 | ||
3e189519 | 567 | |
90c9960e | 568 | /** |
3e189519 | 569 | * vmbus_child_driver_register() - Register a vmbus's child driver |
c643269d | 570 | * @drv: Pointer to driver structure you want to register |
3e189519 | 571 | * |
3e189519 HJ |
572 | * |
573 | * Registers the given driver with Linux through the 'driver_register()' call | |
574 | * And sets up the hyper-v vmbus handling for this driver. | |
575 | * It will return the state of the 'driver_register()' call. | |
576 | * | |
577 | * Mainly used by Hyper-V drivers. | |
90c9960e | 578 | */ |
c643269d | 579 | int vmbus_child_driver_register(struct device_driver *drv) |
3e7ee490 | 580 | { |
5d48a1c2 | 581 | int ret; |
3e7ee490 | 582 | |
90c9960e | 583 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
c643269d | 584 | drv, drv->name); |
3e7ee490 | 585 | |
454f18a9 | 586 | /* The child driver on this vmbus */ |
c643269d | 587 | drv->bus = &vmbus_drv.bus; |
3e7ee490 | 588 | |
c643269d | 589 | ret = driver_register(drv); |
3e7ee490 | 590 | |
2d6e882b | 591 | vmbus_request_offers(); |
3e7ee490 | 592 | |
5d48a1c2 | 593 | return ret; |
3e7ee490 | 594 | } |
3e7ee490 HJ |
595 | EXPORT_SYMBOL(vmbus_child_driver_register); |
596 | ||
90c9960e | 597 | /** |
3e189519 | 598 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
06de23f7 | 599 | * @drv: Pointer to driver structure you want to un-register |
3e189519 | 600 | * |
3e189519 HJ |
601 | * |
602 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
603 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
604 | * | |
605 | * Mainly used by Hyper-V drivers. | |
90c9960e | 606 | */ |
06de23f7 | 607 | void vmbus_child_driver_unregister(struct device_driver *drv) |
3e7ee490 | 608 | { |
90c9960e | 609 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
06de23f7 | 610 | drv, drv->name); |
3e7ee490 | 611 | |
06de23f7 | 612 | driver_unregister(drv); |
3e7ee490 | 613 | |
06de23f7 | 614 | drv->bus = NULL; |
3e7ee490 | 615 | } |
3e7ee490 HJ |
616 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
617 | ||
3e189519 HJ |
618 | /* |
619 | * vmbus_child_device_create - Creates and registers a new child device | |
620 | * on the vmbus. | |
90c9960e | 621 | */ |
89733aa9 GKH |
622 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
623 | struct hv_guid *instance, | |
624 | struct vmbus_channel *channel) | |
3e7ee490 | 625 | { |
3d3b5518 | 626 | struct hv_device *child_device_obj; |
3e7ee490 | 627 | |
454f18a9 | 628 | /* Allocate the new child device */ |
6bad88da S |
629 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
630 | if (!child_device_obj) { | |
90c9960e GKH |
631 | DPRINT_ERR(VMBUS_DRV, |
632 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
633 | return NULL; |
634 | } | |
635 | ||
636 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
637 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
638 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
639 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
640 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
6bad88da | 641 | &child_device_obj->device, |
daaa8cc3 GKH |
642 | type->data[3], type->data[2], type->data[1], type->data[0], |
643 | type->data[5], type->data[4], type->data[7], type->data[6], | |
644 | type->data[8], type->data[9], type->data[10], type->data[11], | |
645 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
646 | instance->data[3], instance->data[2], |
647 | instance->data[1], instance->data[0], | |
648 | instance->data[5], instance->data[4], | |
649 | instance->data[7], instance->data[6], | |
650 | instance->data[8], instance->data[9], | |
651 | instance->data[10], instance->data[11], | |
652 | instance->data[12], instance->data[13], | |
653 | instance->data[14], instance->data[15]); | |
3e7ee490 | 654 | |
cae5b843 | 655 | child_device_obj->channel = channel; |
ca623ad3 HZ |
656 | memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid)); |
657 | memcpy(&child_device_obj->dev_instance, instance, | |
90c9960e | 658 | sizeof(struct hv_guid)); |
3e7ee490 | 659 | |
3e7ee490 | 660 | |
3e7ee490 HJ |
661 | return child_device_obj; |
662 | } | |
663 | ||
3e189519 | 664 | /* |
90c9960e GKH |
665 | * vmbus_child_device_register - Register the child device on the specified bus |
666 | */ | |
98293a27 GKH |
667 | int vmbus_child_device_register(struct hv_device *root_device_obj, |
668 | struct hv_device *child_device_obj) | |
3e7ee490 | 669 | { |
90c9960e | 670 | int ret = 0; |
6bad88da | 671 | |
f4888417 | 672 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 673 | |
90c9960e | 674 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
6bad88da | 675 | child_device_obj); |
454f18a9 | 676 | |
1bb40a25 | 677 | /* Set the device name. Otherwise, device_register() will fail. */ |
6bad88da | 678 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
90c9960e | 679 | atomic_inc_return(&device_num)); |
3e7ee490 | 680 | |
454f18a9 | 681 | /* The new device belongs to this bus */ |
6bad88da S |
682 | child_device_obj->device.bus = &vmbus_drv.bus; /* device->dev.bus; */ |
683 | child_device_obj->device.parent = &root_device_obj->device; | |
684 | child_device_obj->device.release = vmbus_device_release; | |
3e7ee490 | 685 | |
90c9960e GKH |
686 | /* |
687 | * Register with the LDM. This will kick off the driver/device | |
688 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
689 | */ | |
6bad88da | 690 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 691 | |
454f18a9 | 692 | /* vmbus_probe() error does not get propergate to device_register(). */ |
6bad88da | 693 | ret = child_device_obj->probe_error; |
3e7ee490 HJ |
694 | |
695 | if (ret) | |
90c9960e | 696 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
6bad88da | 697 | &child_device_obj->device); |
3e7ee490 | 698 | else |
90c9960e | 699 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
6bad88da | 700 | &child_device_obj->device); |
3e7ee490 | 701 | |
3e7ee490 HJ |
702 | return ret; |
703 | } | |
704 | ||
3e189519 HJ |
705 | /* |
706 | * vmbus_child_device_unregister - Remove the specified child device | |
707 | * from the vmbus. | |
90c9960e | 708 | */ |
9d8bd71a | 709 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 710 | { |
3e7ee490 | 711 | |
90c9960e | 712 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
6bad88da | 713 | &device_obj->device); |
3e7ee490 | 714 | |
90c9960e GKH |
715 | /* |
716 | * Kick off the process of unregistering the device. | |
717 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
718 | */ | |
6bad88da | 719 | device_unregister(&device_obj->device); |
3e7ee490 | 720 | |
90c9960e | 721 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
6bad88da | 722 | &device_obj->device); |
3e7ee490 HJ |
723 | } |
724 | ||
3e189519 | 725 | /* |
90c9960e GKH |
726 | * vmbus_uevent - add uevent for our device |
727 | * | |
728 | * This routine is invoked when a device is added or removed on the vmbus to | |
729 | * generate a uevent to udev in the userspace. The udev will then look at its | |
730 | * rule and the uevent generated here to load the appropriate driver | |
731 | */ | |
3e7ee490 HJ |
732 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
733 | { | |
6bad88da | 734 | struct hv_device *dev = device_to_hv_device(device); |
3e7ee490 HJ |
735 | int ret; |
736 | ||
90c9960e GKH |
737 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
738 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
739 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
740 | dev->dev_type.data[3], dev->dev_type.data[2], |
741 | dev->dev_type.data[1], dev->dev_type.data[0], | |
742 | dev->dev_type.data[5], dev->dev_type.data[4], | |
743 | dev->dev_type.data[7], dev->dev_type.data[6], | |
744 | dev->dev_type.data[8], dev->dev_type.data[9], | |
745 | dev->dev_type.data[10], | |
746 | dev->dev_type.data[11], | |
747 | dev->dev_type.data[12], | |
748 | dev->dev_type.data[13], | |
749 | dev->dev_type.data[14], | |
750 | dev->dev_type.data[15]); | |
3e7ee490 | 751 | |
90c9960e GKH |
752 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
753 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
754 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
755 | dev->dev_type.data[3], |
756 | dev->dev_type.data[2], | |
757 | dev->dev_type.data[1], | |
758 | dev->dev_type.data[0], | |
759 | dev->dev_type.data[5], | |
760 | dev->dev_type.data[4], | |
761 | dev->dev_type.data[7], | |
762 | dev->dev_type.data[6], | |
763 | dev->dev_type.data[8], | |
764 | dev->dev_type.data[9], | |
765 | dev->dev_type.data[10], | |
766 | dev->dev_type.data[11], | |
767 | dev->dev_type.data[12], | |
768 | dev->dev_type.data[13], | |
769 | dev->dev_type.data[14], | |
770 | dev->dev_type.data[15]); | |
3e7ee490 HJ |
771 | |
772 | if (ret) | |
3e7ee490 | 773 | return ret; |
3e7ee490 | 774 | |
90c9960e GKH |
775 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
776 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
777 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
d5889771 S |
778 | dev->dev_instance.data[3], |
779 | dev->dev_instance.data[2], | |
780 | dev->dev_instance.data[1], | |
781 | dev->dev_instance.data[0], | |
782 | dev->dev_instance.data[5], | |
783 | dev->dev_instance.data[4], | |
784 | dev->dev_instance.data[7], | |
785 | dev->dev_instance.data[6], | |
786 | dev->dev_instance.data[8], | |
787 | dev->dev_instance.data[9], | |
788 | dev->dev_instance.data[10], | |
789 | dev->dev_instance.data[11], | |
790 | dev->dev_instance.data[12], | |
791 | dev->dev_instance.data[13], | |
792 | dev->dev_instance.data[14], | |
793 | dev->dev_instance.data[15]); | |
3e7ee490 | 794 | if (ret) |
3e7ee490 | 795 | return ret; |
3e7ee490 | 796 | |
3e7ee490 HJ |
797 | return 0; |
798 | } | |
799 | ||
3e189519 | 800 | /* |
90c9960e GKH |
801 | * vmbus_match - Attempt to match the specified device to the specified driver |
802 | */ | |
3e7ee490 HJ |
803 | static int vmbus_match(struct device *device, struct device_driver *driver) |
804 | { | |
90c9960e | 805 | int match = 0; |
150f9398 | 806 | struct hv_driver *drv = drv_to_hv_drv(driver); |
6bad88da | 807 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 808 | |
454f18a9 | 809 | /* We found our driver ? */ |
6bad88da | 810 | if (memcmp(&device_ctx->dev_type, &drv->dev_type, |
90c9960e | 811 | sizeof(struct hv_guid)) == 0) { |
90c9960e | 812 | |
6bad88da | 813 | device_ctx->drv = drv->priv; |
90c9960e GKH |
814 | DPRINT_INFO(VMBUS_DRV, |
815 | "device object (%p) set to driver object (%p)", | |
6bad88da S |
816 | &device_ctx, |
817 | device_ctx->drv); | |
3e7ee490 HJ |
818 | |
819 | match = 1; | |
820 | } | |
3e7ee490 HJ |
821 | return match; |
822 | } | |
823 | ||
3e189519 | 824 | /* |
90c9960e GKH |
825 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
826 | * | |
827 | * We need a callback because we cannot invoked device_unregister() inside | |
828 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
829 | * i.e. we cannot call device_unregister() inside device_register() | |
830 | */ | |
3e7ee490 | 831 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 832 | { |
6bad88da | 833 | struct hv_device *device_ctx = (struct hv_device *)context; |
3e7ee490 | 834 | |
90c9960e GKH |
835 | /* |
836 | * Kick off the process of unregistering the device. | |
837 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
838 | */ | |
3e7ee490 HJ |
839 | device_unregister(&device_ctx->device); |
840 | ||
454f18a9 | 841 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
842 | } |
843 | ||
3e189519 | 844 | /* |
90c9960e GKH |
845 | * vmbus_probe - Add the new vmbus's child device |
846 | */ | |
3e7ee490 HJ |
847 | static int vmbus_probe(struct device *child_device) |
848 | { | |
90c9960e | 849 | int ret = 0; |
150f9398 S |
850 | struct hv_driver *drv = |
851 | drv_to_hv_drv(child_device->driver); | |
6bad88da | 852 | struct hv_device *dev = device_to_hv_device(child_device); |
3e7ee490 | 853 | |
454f18a9 | 854 | /* Let the specific open-source driver handles the probe if it can */ |
150f9398 | 855 | if (drv->driver.probe) { |
6bad88da | 856 | ret = dev->probe_error = |
150f9398 | 857 | drv->driver.probe(child_device); |
90c9960e GKH |
858 | if (ret != 0) { |
859 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
860 | "(%p) on driver %s (%d)...", | |
861 | dev_name(child_device), child_device, | |
862 | child_device->driver->name, ret); | |
863 | ||
a3c7fe9a | 864 | INIT_WORK(&dev->probe_failed_work_item, |
90c9960e | 865 | vmbus_probe_failed_cb); |
a3c7fe9a | 866 | schedule_work(&dev->probe_failed_work_item); |
3e7ee490 | 867 | } |
90c9960e GKH |
868 | } else { |
869 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
870 | child_device->driver->name); | |
3e7ee490 HJ |
871 | ret = -1; |
872 | } | |
3e7ee490 HJ |
873 | return ret; |
874 | } | |
875 | ||
3e189519 | 876 | /* |
90c9960e GKH |
877 | * vmbus_remove - Remove a vmbus device |
878 | */ | |
3e7ee490 HJ |
879 | static int vmbus_remove(struct device *child_device) |
880 | { | |
90c9960e | 881 | int ret; |
150f9398 | 882 | struct hv_driver *drv; |
3e7ee490 | 883 | |
454f18a9 | 884 | /* Special case root bus device */ |
90c9960e GKH |
885 | if (child_device->parent == NULL) { |
886 | /* | |
887 | * No-op since it is statically defined and handle in | |
888 | * vmbus_bus_exit() | |
889 | */ | |
3e7ee490 HJ |
890 | return 0; |
891 | } | |
892 | ||
90c9960e | 893 | if (child_device->driver) { |
150f9398 | 894 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 895 | |
90c9960e GKH |
896 | /* |
897 | * Let the specific open-source driver handles the removal if | |
898 | * it can | |
899 | */ | |
150f9398 S |
900 | if (drv->driver.remove) { |
901 | ret = drv->driver.remove(child_device); | |
90c9960e GKH |
902 | } else { |
903 | DPRINT_ERR(VMBUS_DRV, | |
904 | "remove() method not set for driver - %s", | |
905 | child_device->driver->name); | |
3e7ee490 HJ |
906 | ret = -1; |
907 | } | |
908 | } | |
3e7ee490 | 909 | |
3e7ee490 HJ |
910 | return 0; |
911 | } | |
912 | ||
3e189519 | 913 | /* |
90c9960e GKH |
914 | * vmbus_shutdown - Shutdown a vmbus device |
915 | */ | |
3e7ee490 HJ |
916 | static void vmbus_shutdown(struct device *child_device) |
917 | { | |
150f9398 | 918 | struct hv_driver *drv; |
3e7ee490 | 919 | |
454f18a9 | 920 | /* Special case root bus device */ |
90c9960e GKH |
921 | if (child_device->parent == NULL) { |
922 | /* | |
923 | * No-op since it is statically defined and handle in | |
924 | * vmbus_bus_exit() | |
925 | */ | |
3e7ee490 HJ |
926 | return; |
927 | } | |
928 | ||
454f18a9 | 929 | /* The device may not be attached yet */ |
83c720ea | 930 | if (!child_device->driver) |
3e7ee490 | 931 | return; |
3e7ee490 | 932 | |
150f9398 | 933 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 934 | |
454f18a9 | 935 | /* Let the specific open-source driver handles the removal if it can */ |
150f9398 S |
936 | if (drv->driver.shutdown) |
937 | drv->driver.shutdown(child_device); | |
3e7ee490 | 938 | |
3e7ee490 HJ |
939 | return; |
940 | } | |
941 | ||
3e189519 | 942 | /* |
90c9960e GKH |
943 | * vmbus_bus_release - Final callback release of the vmbus root device |
944 | */ | |
3e7ee490 HJ |
945 | static void vmbus_bus_release(struct device *device) |
946 | { | |
689bf406 GKH |
947 | /* FIXME */ |
948 | /* Empty release functions are a bug, or a major sign | |
949 | * of a problem design, this MUST BE FIXED! */ | |
950 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
951 | WARN_ON(1); | |
3e7ee490 HJ |
952 | } |
953 | ||
3e189519 | 954 | /* |
90c9960e GKH |
955 | * vmbus_device_release - Final callback release of the vmbus child device |
956 | */ | |
3e7ee490 HJ |
957 | static void vmbus_device_release(struct device *device) |
958 | { | |
6bad88da | 959 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 960 | |
3e7ee490 HJ |
961 | kfree(device_ctx); |
962 | ||
454f18a9 | 963 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
964 | } |
965 | ||
3e7ee490 | 966 | |
3e7ee490 | 967 | |
90c9960e | 968 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 969 | { |
90c9960e | 970 | int ret; |
3e7ee490 | 971 | |
480ae58d | 972 | ret = vmbus_on_isr(); |
3e7ee490 | 973 | |
454f18a9 | 974 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
975 | if (ret > 0) { |
976 | if (test_bit(0, (unsigned long *)&ret)) | |
adf874cb | 977 | tasklet_schedule(&vmbus_drv.msg_dpc); |
3e7ee490 | 978 | |
90c9960e | 979 | if (test_bit(1, (unsigned long *)&ret)) |
adf874cb | 980 | tasklet_schedule(&vmbus_drv.event_dpc); |
3e7ee490 | 981 | |
3e7ee490 | 982 | return IRQ_HANDLED; |
90c9960e | 983 | } else { |
3e7ee490 HJ |
984 | return IRQ_NONE; |
985 | } | |
986 | } | |
987 | ||
c22090fa GKH |
988 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
989 | { | |
990 | .ident = "Hyper-V", | |
991 | .matches = { | |
992 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
993 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
994 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
995 | }, | |
996 | }, | |
997 | { }, | |
998 | }; | |
999 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
1000 | ||
3e7ee490 HJ |
1001 | static int __init vmbus_init(void) |
1002 | { | |
3e7ee490 HJ |
1003 | DPRINT_INFO(VMBUS_DRV, |
1004 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
1005 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 1006 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 1007 | |
c22090fa GKH |
1008 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
1009 | return -ENODEV; | |
1010 | ||
6c884555 | 1011 | return vmbus_bus_init(); |
3e7ee490 HJ |
1012 | } |
1013 | ||
3e7ee490 HJ |
1014 | static void __exit vmbus_exit(void) |
1015 | { | |
3e7ee490 | 1016 | vmbus_bus_exit(); |
90c9960e | 1017 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1018 | } |
1019 | ||
9a775dbd GKH |
1020 | /* |
1021 | * We use a PCI table to determine if we should autoload this driver This is | |
1022 | * needed by distro tools to determine if the hyperv drivers should be | |
1023 | * installed and/or configured. We don't do anything else with the table, but | |
1024 | * it needs to be present. | |
9a775dbd | 1025 | */ |
15f0beb1 | 1026 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
1027 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
1028 | { 0 } | |
1029 | }; | |
1030 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1031 | ||
90c9960e | 1032 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1033 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1034 | module_param(vmbus_irq, int, S_IRUGO); |
1035 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1036 | |
1037 | module_init(vmbus_init); | |
1038 | module_exit(vmbus_exit); |