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Commit | Line | Data |
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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 HJ |
59 | static void vmbus_event_dpc(unsigned long data); |
60 | ||
90c9960e | 61 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
62 | |
63 | static void vmbus_device_release(struct device *device); | |
64 | static void vmbus_bus_release(struct device *device); | |
65 | ||
90c9960e GKH |
66 | static ssize_t vmbus_show_device_attr(struct device *dev, |
67 | struct device_attribute *dev_attr, | |
68 | char *buf); | |
3e7ee490 | 69 | |
3e7ee490 | 70 | |
90c9960e | 71 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 72 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
73 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
74 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
75 | |
76 | static int vmbus_irq = VMBUS_IRQ; | |
77 | ||
454f18a9 | 78 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
79 | static struct device_attribute vmbus_device_attrs[] = { |
80 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
81 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
82 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
83 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
84 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
85 | ||
86 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
87 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
88 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
89 | ||
90 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
91 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
92 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
93 | ||
94 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
95 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
98 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
99 | ||
100 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
101 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
102 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | __ATTR_NULL | |
106 | }; | |
3e7ee490 | 107 | |
454f18a9 | 108 | /* The one and only one */ |
adf874cb | 109 | static struct vmbus_driver_context vmbus_drv = { |
90c9960e GKH |
110 | .bus.name = "vmbus", |
111 | .bus.match = vmbus_match, | |
112 | .bus.shutdown = vmbus_shutdown, | |
113 | .bus.remove = vmbus_remove, | |
114 | .bus.probe = vmbus_probe, | |
115 | .bus.uevent = vmbus_uevent, | |
116 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
117 | }; |
118 | ||
adf874cb | 119 | static const char *driver_name = "hyperv"; |
36199a99 GKH |
120 | |
121 | /* | |
122 | * Windows vmbus does not defined this. | |
123 | * We defined this to be consistent with other devices | |
124 | */ | |
125 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
adf874cb | 126 | static const struct hv_guid device_type = { |
36199a99 GKH |
127 | .data = { |
128 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
129 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
130 | } | |
131 | }; | |
132 | ||
133 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ | |
adf874cb | 134 | static const struct hv_guid device_id = { |
36199a99 GKH |
135 | .data = { |
136 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
137 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
138 | } | |
139 | }; | |
140 | ||
adf874cb | 141 | static struct hv_device *vmbus_device; /* vmbus root device */ |
36199a99 GKH |
142 | |
143 | /* | |
646f1ea3 | 144 | * vmbus_child_dev_add - Registers the child device with the vmbus |
36199a99 | 145 | */ |
646f1ea3 | 146 | int vmbus_child_dev_add(struct hv_device *child_dev) |
36199a99 | 147 | { |
adf874cb | 148 | return vmbus_child_device_register(vmbus_device, child_dev); |
36199a99 GKH |
149 | } |
150 | ||
151 | /* | |
646f1ea3 | 152 | * vmbus_dev_add - Callback when the root bus device is added |
36199a99 | 153 | */ |
646f1ea3 | 154 | static int vmbus_dev_add(struct hv_device *dev, void *info) |
36199a99 | 155 | { |
adf874cb | 156 | u32 *irqvector = info; |
36199a99 GKH |
157 | int ret; |
158 | ||
adf874cb | 159 | vmbus_device = dev; |
36199a99 | 160 | |
ca623ad3 HZ |
161 | memcpy(&vmbus_device->dev_type, &device_type, sizeof(struct hv_guid)); |
162 | memcpy(&vmbus_device->dev_instance, &device_id, | |
36199a99 GKH |
163 | sizeof(struct hv_guid)); |
164 | ||
165 | /* strcpy(dev->name, "vmbus"); */ | |
166 | /* SynIC setup... */ | |
167 | on_each_cpu(hv_synic_init, (void *)irqvector, 1); | |
168 | ||
169 | /* Connect to VMBus in the root partition */ | |
c6977677 | 170 | ret = vmbus_connect(); |
36199a99 GKH |
171 | |
172 | /* VmbusSendEvent(device->localPortId+1); */ | |
173 | return ret; | |
174 | } | |
175 | ||
176 | /* | |
646f1ea3 | 177 | * vmbus_dev_rm - Callback when the root bus device is removed |
36199a99 | 178 | */ |
646f1ea3 | 179 | static int vmbus_dev_rm(struct hv_device *dev) |
36199a99 GKH |
180 | { |
181 | int ret = 0; | |
182 | ||
183 | vmbus_release_unattached_channels(); | |
c6977677 | 184 | vmbus_disconnect(); |
36199a99 GKH |
185 | on_each_cpu(hv_synic_cleanup, NULL, 1); |
186 | return ret; | |
187 | } | |
188 | ||
189 | /* | |
646f1ea3 | 190 | * vmbus_cleanup - Perform any cleanup when the driver is removed |
36199a99 | 191 | */ |
21ec2de2 | 192 | static void vmbus_cleanup(void) |
36199a99 | 193 | { |
36199a99 GKH |
194 | |
195 | hv_cleanup(); | |
196 | } | |
197 | ||
bf6506f6 TT |
198 | struct onmessage_work_context { |
199 | struct work_struct work; | |
200 | struct hv_message msg; | |
201 | }; | |
202 | ||
203 | static void vmbus_onmessage_work(struct work_struct *work) | |
204 | { | |
205 | struct onmessage_work_context *ctx; | |
206 | ||
207 | ctx = container_of(work, struct onmessage_work_context, | |
208 | work); | |
209 | vmbus_onmessage(&ctx->msg); | |
210 | kfree(ctx); | |
211 | } | |
212 | ||
36199a99 GKH |
213 | /* |
214 | * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior | |
215 | */ | |
62c1059d | 216 | static void vmbus_on_msg_dpc(unsigned long data) |
36199a99 GKH |
217 | { |
218 | int cpu = smp_processor_id(); | |
219 | void *page_addr = hv_context.synic_message_page[cpu]; | |
220 | struct hv_message *msg = (struct hv_message *)page_addr + | |
221 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 222 | struct onmessage_work_context *ctx; |
36199a99 GKH |
223 | |
224 | while (1) { | |
225 | if (msg->header.message_type == HVMSG_NONE) { | |
226 | /* no msg */ | |
227 | break; | |
228 | } else { | |
bf6506f6 TT |
229 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
230 | if (ctx == NULL) | |
36199a99 | 231 | continue; |
bf6506f6 TT |
232 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
233 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 234 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
235 | } |
236 | ||
237 | msg->header.message_type = HVMSG_NONE; | |
238 | ||
239 | /* | |
240 | * Make sure the write to MessageType (ie set to | |
241 | * HVMSG_NONE) happens before we read the | |
242 | * MessagePending and EOMing. Otherwise, the EOMing | |
243 | * will not deliver any more messages since there is | |
244 | * no empty slot | |
245 | */ | |
246 | mb(); | |
247 | ||
248 | if (msg->header.message_flags.msg_pending) { | |
249 | /* | |
250 | * This will cause message queue rescan to | |
251 | * possibly deliver another msg from the | |
252 | * hypervisor | |
253 | */ | |
254 | wrmsrl(HV_X64_MSR_EOM, 0); | |
255 | } | |
256 | } | |
257 | } | |
258 | ||
36199a99 GKH |
259 | /* |
260 | * vmbus_on_isr - ISR routine | |
261 | */ | |
cef6dbfa | 262 | static int vmbus_on_isr(struct hv_driver *drv) |
36199a99 GKH |
263 | { |
264 | int ret = 0; | |
265 | int cpu = smp_processor_id(); | |
266 | void *page_addr; | |
267 | struct hv_message *msg; | |
268 | union hv_synic_event_flags *event; | |
269 | ||
270 | page_addr = hv_context.synic_message_page[cpu]; | |
271 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
272 | ||
273 | /* Check if there are actual msgs to be process */ | |
274 | if (msg->header.message_type != HVMSG_NONE) { | |
275 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
276 | msg->header.message_type, | |
277 | msg->header.payload_size); | |
278 | ret |= 0x1; | |
279 | } | |
280 | ||
281 | /* TODO: Check if there are events to be process */ | |
282 | page_addr = hv_context.synic_event_page[cpu]; | |
283 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; | |
284 | ||
285 | /* Since we are a child, we only need to check bit 0 */ | |
286 | if (test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { | |
287 | DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]); | |
288 | ret |= 0x2; | |
289 | } | |
290 | ||
291 | return ret; | |
292 | } | |
293 | ||
150b19d4 GKH |
294 | static void get_channel_info(struct hv_device *device, |
295 | struct hv_device_info *info) | |
296 | { | |
297 | struct vmbus_channel_debug_info debug_info; | |
298 | ||
cae5b843 | 299 | if (!device->channel) |
150b19d4 GKH |
300 | return; |
301 | ||
cae5b843 | 302 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 303 | |
ca623ad3 HZ |
304 | info->chn_id = debug_info.relid; |
305 | info->chn_state = debug_info.state; | |
306 | memcpy(&info->chn_type, &debug_info.interfacetype, | |
150b19d4 | 307 | sizeof(struct hv_guid)); |
ca623ad3 | 308 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
150b19d4 GKH |
309 | sizeof(struct hv_guid)); |
310 | ||
ca623ad3 | 311 | info->monitor_id = debug_info.monitorid; |
150b19d4 | 312 | |
ca623ad3 HZ |
313 | info->server_monitor_pending = debug_info.servermonitor_pending; |
314 | info->server_monitor_latency = debug_info.servermonitor_latency; | |
315 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; | |
150b19d4 | 316 | |
ca623ad3 HZ |
317 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
318 | info->client_monitor_latency = debug_info.clientmonitor_latency; | |
319 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; | |
150b19d4 | 320 | |
ca623ad3 HZ |
321 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
322 | info->inbound.read_idx = debug_info.inbound.current_read_index; | |
323 | info->inbound.write_idx = debug_info.inbound.current_write_index; | |
324 | info->inbound.bytes_avail_toread = | |
325 | debug_info.inbound.bytes_avail_toread; | |
326 | info->inbound.bytes_avail_towrite = | |
82f8bd40 HZ |
327 | debug_info.inbound.bytes_avail_towrite; |
328 | ||
ca623ad3 | 329 | info->outbound.int_mask = |
82f8bd40 | 330 | debug_info.outbound.current_interrupt_mask; |
ca623ad3 HZ |
331 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
332 | info->outbound.write_idx = debug_info.outbound.current_write_index; | |
333 | info->outbound.bytes_avail_toread = | |
82f8bd40 | 334 | debug_info.outbound.bytes_avail_toread; |
ca623ad3 | 335 | info->outbound.bytes_avail_towrite = |
82f8bd40 | 336 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
337 | } |
338 | ||
3e189519 | 339 | /* |
90c9960e GKH |
340 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
341 | * | |
342 | * This is invoked when user does a | |
343 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
344 | */ | |
345 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
346 | struct device_attribute *dev_attr, | |
347 | char *buf) | |
3e7ee490 | 348 | { |
6bad88da | 349 | struct hv_device *device_ctx = device_to_hv_device(dev); |
ee3d7ddf | 350 | struct hv_device_info device_info; |
3e7ee490 | 351 | |
ee3d7ddf | 352 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 353 | |
6bad88da | 354 | get_channel_info(device_ctx, &device_info); |
3e7ee490 | 355 | |
90c9960e GKH |
356 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
357 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
358 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
359 | device_info.chn_type.data[3], |
360 | device_info.chn_type.data[2], | |
361 | device_info.chn_type.data[1], | |
362 | device_info.chn_type.data[0], | |
363 | device_info.chn_type.data[5], | |
364 | device_info.chn_type.data[4], | |
365 | device_info.chn_type.data[7], | |
366 | device_info.chn_type.data[6], | |
367 | device_info.chn_type.data[8], | |
368 | device_info.chn_type.data[9], | |
369 | device_info.chn_type.data[10], | |
370 | device_info.chn_type.data[11], | |
371 | device_info.chn_type.data[12], | |
372 | device_info.chn_type.data[13], | |
373 | device_info.chn_type.data[14], | |
374 | device_info.chn_type.data[15]); | |
90c9960e GKH |
375 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
376 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
377 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
378 | device_info.chn_instance.data[3], |
379 | device_info.chn_instance.data[2], | |
380 | device_info.chn_instance.data[1], | |
381 | device_info.chn_instance.data[0], | |
382 | device_info.chn_instance.data[5], | |
383 | device_info.chn_instance.data[4], | |
384 | device_info.chn_instance.data[7], | |
385 | device_info.chn_instance.data[6], | |
386 | device_info.chn_instance.data[8], | |
387 | device_info.chn_instance.data[9], | |
388 | device_info.chn_instance.data[10], | |
389 | device_info.chn_instance.data[11], | |
390 | device_info.chn_instance.data[12], | |
391 | device_info.chn_instance.data[13], | |
392 | device_info.chn_instance.data[14], | |
393 | device_info.chn_instance.data[15]); | |
90c9960e | 394 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
ca623ad3 | 395 | return sprintf(buf, "%d\n", device_info.chn_state); |
90c9960e | 396 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
ca623ad3 | 397 | return sprintf(buf, "%d\n", device_info.chn_id); |
90c9960e | 398 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
ca623ad3 | 399 | return sprintf(buf, "%d\n", device_info.outbound.int_mask); |
90c9960e | 400 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
ca623ad3 | 401 | return sprintf(buf, "%d\n", device_info.outbound.read_idx); |
90c9960e | 402 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
ca623ad3 | 403 | return sprintf(buf, "%d\n", device_info.outbound.write_idx); |
90c9960e GKH |
404 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
405 | return sprintf(buf, "%d\n", | |
ca623ad3 | 406 | device_info.outbound.bytes_avail_toread); |
90c9960e GKH |
407 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
408 | return sprintf(buf, "%d\n", | |
ca623ad3 | 409 | device_info.outbound.bytes_avail_towrite); |
90c9960e | 410 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
ca623ad3 | 411 | return sprintf(buf, "%d\n", device_info.inbound.int_mask); |
90c9960e | 412 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
ca623ad3 | 413 | return sprintf(buf, "%d\n", device_info.inbound.read_idx); |
90c9960e | 414 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
ca623ad3 | 415 | return sprintf(buf, "%d\n", device_info.inbound.write_idx); |
90c9960e GKH |
416 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
417 | return sprintf(buf, "%d\n", | |
ca623ad3 | 418 | device_info.inbound.bytes_avail_toread); |
90c9960e GKH |
419 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
420 | return sprintf(buf, "%d\n", | |
ca623ad3 | 421 | device_info.inbound.bytes_avail_towrite); |
90c9960e | 422 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
ca623ad3 | 423 | return sprintf(buf, "%d\n", device_info.monitor_id); |
90c9960e | 424 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
ca623ad3 | 425 | return sprintf(buf, "%d\n", device_info.server_monitor_pending); |
90c9960e | 426 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
ca623ad3 | 427 | return sprintf(buf, "%d\n", device_info.server_monitor_latency); |
90c9960e GKH |
428 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
429 | return sprintf(buf, "%d\n", | |
ca623ad3 | 430 | device_info.server_monitor_conn_id); |
90c9960e | 431 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
ca623ad3 | 432 | return sprintf(buf, "%d\n", device_info.client_monitor_pending); |
90c9960e | 433 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
ca623ad3 | 434 | return sprintf(buf, "%d\n", device_info.client_monitor_latency); |
90c9960e GKH |
435 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
436 | return sprintf(buf, "%d\n", | |
ca623ad3 | 437 | device_info.client_monitor_conn_id); |
90c9960e | 438 | } else { |
3e7ee490 HJ |
439 | return 0; |
440 | } | |
441 | } | |
442 | ||
3e189519 | 443 | /* |
90c9960e GKH |
444 | * vmbus_bus_init -Main vmbus driver initialization routine. |
445 | * | |
446 | * Here, we | |
0686e4f4 LL |
447 | * - initialize the vmbus driver context |
448 | * - setup various driver entry points | |
449 | * - invoke the vmbus hv main init routine | |
450 | * - get the irq resource | |
451 | * - invoke the vmbus to add the vmbus root device | |
452 | * - setup the vmbus root device | |
453 | * - retrieve the channel offers | |
90c9960e | 454 | */ |
6c884555 | 455 | static int vmbus_bus_init(void) |
3e7ee490 | 456 | { |
adf874cb | 457 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
6bad88da | 458 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
90c9960e GKH |
459 | int ret; |
460 | unsigned int vector; | |
3e7ee490 | 461 | |
6d26e38f GKH |
462 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
463 | HV_DRV_VERSION); | |
464 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", | |
465 | VMBUS_REVISION_NUMBER); | |
466 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
467 | VMBUS_MESSAGE_SINT); | |
468 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " | |
469 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", | |
470 | sizeof(struct vmbus_channel_packet_page_buffer), | |
471 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
472 | ||
6d26e38f GKH |
473 | |
474 | /* Hypervisor initialization...setup hypercall page..etc */ | |
475 | ret = hv_init(); | |
90c9960e | 476 | if (ret != 0) { |
6d26e38f GKH |
477 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", |
478 | ret); | |
3e7ee490 HJ |
479 | goto cleanup; |
480 | } | |
481 | ||
3e7ee490 | 482 | |
a6e4d8e3 | 483 | vmbus_drv_ctx->bus.name = driver_name; |
3e7ee490 | 484 | |
454f18a9 | 485 | /* Initialize the bus context */ |
62c1059d | 486 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_on_msg_dpc, |
a6e4d8e3 | 487 | (unsigned long)NULL); |
90c9960e | 488 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, |
a6e4d8e3 | 489 | (unsigned long)NULL); |
3e7ee490 | 490 | |
a6e4d8e3 | 491 | /* Now, register the bus with LDM */ |
c19fbca3 | 492 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 493 | if (ret) { |
c19fbca3 BP |
494 | ret = -1; |
495 | goto cleanup; | |
496 | } | |
3e7ee490 | 497 | |
454f18a9 | 498 | /* Get the interrupt resource */ |
90c9960e | 499 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
a6e4d8e3 | 500 | driver_name, NULL); |
3e7ee490 | 501 | |
90c9960e GKH |
502 | if (ret != 0) { |
503 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
504 | vmbus_irq); | |
3e7ee490 HJ |
505 | |
506 | bus_unregister(&vmbus_drv_ctx->bus); | |
507 | ||
508 | ret = -1; | |
509 | goto cleanup; | |
510 | } | |
3e7ee490 | 511 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
512 | |
513 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
514 | ||
a6e4d8e3 | 515 | /* Add the root device */ |
6bad88da | 516 | memset(dev_ctx, 0, sizeof(struct hv_device)); |
3e7ee490 | 517 | |
a6e4d8e3 | 518 | ret = vmbus_dev_add(dev_ctx, &vector); |
90c9960e GKH |
519 | if (ret != 0) { |
520 | DPRINT_ERR(VMBUS_DRV, | |
521 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
522 | |
523 | free_irq(vmbus_irq, NULL); | |
524 | ||
525 | bus_unregister(&vmbus_drv_ctx->bus); | |
526 | ||
527 | ret = -1; | |
528 | goto cleanup; | |
529 | } | |
454f18a9 | 530 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 531 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
3e7ee490 | 532 | |
454f18a9 | 533 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 534 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
535 | /* NULL; vmbus_remove() does not get invoked */ |
536 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 537 | |
454f18a9 | 538 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
539 | dev_ctx->device.release = vmbus_bus_release; |
540 | ||
a6e4d8e3 | 541 | /* register the root device */ |
5d48a1c2 | 542 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
543 | if (ret) { |
544 | DPRINT_ERR(VMBUS_DRV, | |
545 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
546 | |
547 | free_irq(vmbus_irq, NULL); | |
548 | bus_unregister(&vmbus_drv_ctx->bus); | |
549 | ||
550 | ret = -1; | |
551 | goto cleanup; | |
552 | } | |
553 | ||
2d6e882b | 554 | vmbus_request_offers(); |
8b5d6d3b HZ |
555 | wait_for_completion(&hv_channel_ready); |
556 | ||
3e7ee490 | 557 | cleanup: |
3e7ee490 HJ |
558 | return ret; |
559 | } | |
560 | ||
3e189519 | 561 | /* |
90c9960e GKH |
562 | * vmbus_bus_exit - Terminate the vmbus driver. |
563 | * | |
564 | * This routine is opposite of vmbus_bus_init() | |
565 | */ | |
bd1de709 | 566 | static void vmbus_bus_exit(void) |
3e7ee490 | 567 | { |
adf874cb | 568 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
3e7ee490 | 569 | |
6bad88da | 570 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
3e7ee490 | 571 | |
454f18a9 | 572 | /* Remove the root device */ |
a6e4d8e3 | 573 | vmbus_dev_rm(dev_ctx); |
3e7ee490 | 574 | |
21ec2de2 | 575 | vmbus_cleanup(); |
3e7ee490 | 576 | |
454f18a9 | 577 | /* Unregister the root bus device */ |
3e7ee490 HJ |
578 | device_unregister(&dev_ctx->device); |
579 | ||
580 | bus_unregister(&vmbus_drv_ctx->bus); | |
581 | ||
582 | free_irq(vmbus_irq, NULL); | |
583 | ||
584 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
585 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
586 | } |
587 | ||
3e189519 | 588 | |
90c9960e | 589 | /** |
3e189519 | 590 | * vmbus_child_driver_register() - Register a vmbus's child driver |
c643269d | 591 | * @drv: Pointer to driver structure you want to register |
3e189519 | 592 | * |
3e189519 HJ |
593 | * |
594 | * Registers the given driver with Linux through the 'driver_register()' call | |
595 | * And sets up the hyper-v vmbus handling for this driver. | |
596 | * It will return the state of the 'driver_register()' call. | |
597 | * | |
598 | * Mainly used by Hyper-V drivers. | |
90c9960e | 599 | */ |
c643269d | 600 | int vmbus_child_driver_register(struct device_driver *drv) |
3e7ee490 | 601 | { |
5d48a1c2 | 602 | int ret; |
3e7ee490 | 603 | |
90c9960e | 604 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
c643269d | 605 | drv, drv->name); |
3e7ee490 | 606 | |
454f18a9 | 607 | /* The child driver on this vmbus */ |
c643269d | 608 | drv->bus = &vmbus_drv.bus; |
3e7ee490 | 609 | |
c643269d | 610 | ret = driver_register(drv); |
3e7ee490 | 611 | |
2d6e882b | 612 | vmbus_request_offers(); |
3e7ee490 | 613 | |
5d48a1c2 | 614 | return ret; |
3e7ee490 | 615 | } |
3e7ee490 HJ |
616 | EXPORT_SYMBOL(vmbus_child_driver_register); |
617 | ||
90c9960e | 618 | /** |
3e189519 | 619 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
06de23f7 | 620 | * @drv: Pointer to driver structure you want to un-register |
3e189519 | 621 | * |
3e189519 HJ |
622 | * |
623 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
624 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
625 | * | |
626 | * Mainly used by Hyper-V drivers. | |
90c9960e | 627 | */ |
06de23f7 | 628 | void vmbus_child_driver_unregister(struct device_driver *drv) |
3e7ee490 | 629 | { |
90c9960e | 630 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
06de23f7 | 631 | drv, drv->name); |
3e7ee490 | 632 | |
06de23f7 | 633 | driver_unregister(drv); |
3e7ee490 | 634 | |
06de23f7 | 635 | drv->bus = NULL; |
3e7ee490 | 636 | } |
3e7ee490 HJ |
637 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
638 | ||
3e189519 HJ |
639 | /* |
640 | * vmbus_child_device_create - Creates and registers a new child device | |
641 | * on the vmbus. | |
90c9960e | 642 | */ |
89733aa9 GKH |
643 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
644 | struct hv_guid *instance, | |
645 | struct vmbus_channel *channel) | |
3e7ee490 | 646 | { |
3d3b5518 | 647 | struct hv_device *child_device_obj; |
3e7ee490 | 648 | |
454f18a9 | 649 | /* Allocate the new child device */ |
6bad88da S |
650 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
651 | if (!child_device_obj) { | |
90c9960e GKH |
652 | DPRINT_ERR(VMBUS_DRV, |
653 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
654 | return NULL; |
655 | } | |
656 | ||
657 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
658 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
659 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
660 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
661 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
6bad88da | 662 | &child_device_obj->device, |
daaa8cc3 GKH |
663 | type->data[3], type->data[2], type->data[1], type->data[0], |
664 | type->data[5], type->data[4], type->data[7], type->data[6], | |
665 | type->data[8], type->data[9], type->data[10], type->data[11], | |
666 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
667 | instance->data[3], instance->data[2], |
668 | instance->data[1], instance->data[0], | |
669 | instance->data[5], instance->data[4], | |
670 | instance->data[7], instance->data[6], | |
671 | instance->data[8], instance->data[9], | |
672 | instance->data[10], instance->data[11], | |
673 | instance->data[12], instance->data[13], | |
674 | instance->data[14], instance->data[15]); | |
3e7ee490 | 675 | |
cae5b843 | 676 | child_device_obj->channel = channel; |
ca623ad3 HZ |
677 | memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid)); |
678 | memcpy(&child_device_obj->dev_instance, instance, | |
90c9960e | 679 | sizeof(struct hv_guid)); |
3e7ee490 | 680 | |
3e7ee490 | 681 | |
3e7ee490 HJ |
682 | return child_device_obj; |
683 | } | |
684 | ||
3e189519 | 685 | /* |
90c9960e GKH |
686 | * vmbus_child_device_register - Register the child device on the specified bus |
687 | */ | |
98293a27 GKH |
688 | int vmbus_child_device_register(struct hv_device *root_device_obj, |
689 | struct hv_device *child_device_obj) | |
3e7ee490 | 690 | { |
90c9960e | 691 | int ret = 0; |
6bad88da | 692 | |
f4888417 | 693 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 694 | |
90c9960e | 695 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
6bad88da | 696 | child_device_obj); |
454f18a9 | 697 | |
1bb40a25 | 698 | /* Set the device name. Otherwise, device_register() will fail. */ |
6bad88da | 699 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
90c9960e | 700 | atomic_inc_return(&device_num)); |
3e7ee490 | 701 | |
454f18a9 | 702 | /* The new device belongs to this bus */ |
6bad88da S |
703 | child_device_obj->device.bus = &vmbus_drv.bus; /* device->dev.bus; */ |
704 | child_device_obj->device.parent = &root_device_obj->device; | |
705 | child_device_obj->device.release = vmbus_device_release; | |
3e7ee490 | 706 | |
90c9960e GKH |
707 | /* |
708 | * Register with the LDM. This will kick off the driver/device | |
709 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
710 | */ | |
6bad88da | 711 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 712 | |
454f18a9 | 713 | /* vmbus_probe() error does not get propergate to device_register(). */ |
6bad88da | 714 | ret = child_device_obj->probe_error; |
3e7ee490 HJ |
715 | |
716 | if (ret) | |
90c9960e | 717 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
6bad88da | 718 | &child_device_obj->device); |
3e7ee490 | 719 | else |
90c9960e | 720 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
6bad88da | 721 | &child_device_obj->device); |
3e7ee490 | 722 | |
3e7ee490 HJ |
723 | return ret; |
724 | } | |
725 | ||
3e189519 HJ |
726 | /* |
727 | * vmbus_child_device_unregister - Remove the specified child device | |
728 | * from the vmbus. | |
90c9960e | 729 | */ |
9d8bd71a | 730 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 731 | { |
3e7ee490 | 732 | |
90c9960e | 733 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
6bad88da | 734 | &device_obj->device); |
3e7ee490 | 735 | |
90c9960e GKH |
736 | /* |
737 | * Kick off the process of unregistering the device. | |
738 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
739 | */ | |
6bad88da | 740 | device_unregister(&device_obj->device); |
3e7ee490 | 741 | |
90c9960e | 742 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
6bad88da | 743 | &device_obj->device); |
3e7ee490 HJ |
744 | } |
745 | ||
3e189519 | 746 | /* |
90c9960e GKH |
747 | * vmbus_uevent - add uevent for our device |
748 | * | |
749 | * This routine is invoked when a device is added or removed on the vmbus to | |
750 | * generate a uevent to udev in the userspace. The udev will then look at its | |
751 | * rule and the uevent generated here to load the appropriate driver | |
752 | */ | |
3e7ee490 HJ |
753 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
754 | { | |
6bad88da | 755 | struct hv_device *dev = device_to_hv_device(device); |
3e7ee490 HJ |
756 | int ret; |
757 | ||
90c9960e GKH |
758 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
759 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
760 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
761 | dev->dev_type.data[3], dev->dev_type.data[2], |
762 | dev->dev_type.data[1], dev->dev_type.data[0], | |
763 | dev->dev_type.data[5], dev->dev_type.data[4], | |
764 | dev->dev_type.data[7], dev->dev_type.data[6], | |
765 | dev->dev_type.data[8], dev->dev_type.data[9], | |
766 | dev->dev_type.data[10], | |
767 | dev->dev_type.data[11], | |
768 | dev->dev_type.data[12], | |
769 | dev->dev_type.data[13], | |
770 | dev->dev_type.data[14], | |
771 | dev->dev_type.data[15]); | |
3e7ee490 | 772 | |
90c9960e GKH |
773 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
774 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
775 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
776 | dev->dev_type.data[3], |
777 | dev->dev_type.data[2], | |
778 | dev->dev_type.data[1], | |
779 | dev->dev_type.data[0], | |
780 | dev->dev_type.data[5], | |
781 | dev->dev_type.data[4], | |
782 | dev->dev_type.data[7], | |
783 | dev->dev_type.data[6], | |
784 | dev->dev_type.data[8], | |
785 | dev->dev_type.data[9], | |
786 | dev->dev_type.data[10], | |
787 | dev->dev_type.data[11], | |
788 | dev->dev_type.data[12], | |
789 | dev->dev_type.data[13], | |
790 | dev->dev_type.data[14], | |
791 | dev->dev_type.data[15]); | |
3e7ee490 HJ |
792 | |
793 | if (ret) | |
3e7ee490 | 794 | return ret; |
3e7ee490 | 795 | |
90c9960e GKH |
796 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
797 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
798 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
d5889771 S |
799 | dev->dev_instance.data[3], |
800 | dev->dev_instance.data[2], | |
801 | dev->dev_instance.data[1], | |
802 | dev->dev_instance.data[0], | |
803 | dev->dev_instance.data[5], | |
804 | dev->dev_instance.data[4], | |
805 | dev->dev_instance.data[7], | |
806 | dev->dev_instance.data[6], | |
807 | dev->dev_instance.data[8], | |
808 | dev->dev_instance.data[9], | |
809 | dev->dev_instance.data[10], | |
810 | dev->dev_instance.data[11], | |
811 | dev->dev_instance.data[12], | |
812 | dev->dev_instance.data[13], | |
813 | dev->dev_instance.data[14], | |
814 | dev->dev_instance.data[15]); | |
3e7ee490 | 815 | if (ret) |
3e7ee490 | 816 | return ret; |
3e7ee490 | 817 | |
3e7ee490 HJ |
818 | return 0; |
819 | } | |
820 | ||
3e189519 | 821 | /* |
90c9960e GKH |
822 | * vmbus_match - Attempt to match the specified device to the specified driver |
823 | */ | |
3e7ee490 HJ |
824 | static int vmbus_match(struct device *device, struct device_driver *driver) |
825 | { | |
90c9960e | 826 | int match = 0; |
150f9398 | 827 | struct hv_driver *drv = drv_to_hv_drv(driver); |
6bad88da | 828 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 829 | |
454f18a9 | 830 | /* We found our driver ? */ |
6bad88da | 831 | if (memcmp(&device_ctx->dev_type, &drv->dev_type, |
90c9960e | 832 | sizeof(struct hv_guid)) == 0) { |
90c9960e | 833 | |
6bad88da | 834 | device_ctx->drv = drv->priv; |
90c9960e GKH |
835 | DPRINT_INFO(VMBUS_DRV, |
836 | "device object (%p) set to driver object (%p)", | |
6bad88da S |
837 | &device_ctx, |
838 | device_ctx->drv); | |
3e7ee490 HJ |
839 | |
840 | match = 1; | |
841 | } | |
3e7ee490 HJ |
842 | return match; |
843 | } | |
844 | ||
3e189519 | 845 | /* |
90c9960e GKH |
846 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
847 | * | |
848 | * We need a callback because we cannot invoked device_unregister() inside | |
849 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
850 | * i.e. we cannot call device_unregister() inside device_register() | |
851 | */ | |
3e7ee490 | 852 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 853 | { |
6bad88da | 854 | struct hv_device *device_ctx = (struct hv_device *)context; |
3e7ee490 | 855 | |
90c9960e GKH |
856 | /* |
857 | * Kick off the process of unregistering the device. | |
858 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
859 | */ | |
3e7ee490 HJ |
860 | device_unregister(&device_ctx->device); |
861 | ||
454f18a9 | 862 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
863 | } |
864 | ||
3e189519 | 865 | /* |
90c9960e GKH |
866 | * vmbus_probe - Add the new vmbus's child device |
867 | */ | |
3e7ee490 HJ |
868 | static int vmbus_probe(struct device *child_device) |
869 | { | |
90c9960e | 870 | int ret = 0; |
150f9398 S |
871 | struct hv_driver *drv = |
872 | drv_to_hv_drv(child_device->driver); | |
6bad88da | 873 | struct hv_device *dev = device_to_hv_device(child_device); |
3e7ee490 | 874 | |
454f18a9 | 875 | /* Let the specific open-source driver handles the probe if it can */ |
150f9398 | 876 | if (drv->driver.probe) { |
6bad88da | 877 | ret = dev->probe_error = |
150f9398 | 878 | drv->driver.probe(child_device); |
90c9960e GKH |
879 | if (ret != 0) { |
880 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
881 | "(%p) on driver %s (%d)...", | |
882 | dev_name(child_device), child_device, | |
883 | child_device->driver->name, ret); | |
884 | ||
a3c7fe9a | 885 | INIT_WORK(&dev->probe_failed_work_item, |
90c9960e | 886 | vmbus_probe_failed_cb); |
a3c7fe9a | 887 | schedule_work(&dev->probe_failed_work_item); |
3e7ee490 | 888 | } |
90c9960e GKH |
889 | } else { |
890 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
891 | child_device->driver->name); | |
3e7ee490 HJ |
892 | ret = -1; |
893 | } | |
3e7ee490 HJ |
894 | return ret; |
895 | } | |
896 | ||
3e189519 | 897 | /* |
90c9960e GKH |
898 | * vmbus_remove - Remove a vmbus device |
899 | */ | |
3e7ee490 HJ |
900 | static int vmbus_remove(struct device *child_device) |
901 | { | |
90c9960e | 902 | int ret; |
150f9398 | 903 | struct hv_driver *drv; |
3e7ee490 | 904 | |
454f18a9 | 905 | /* Special case root bus device */ |
90c9960e GKH |
906 | if (child_device->parent == NULL) { |
907 | /* | |
908 | * No-op since it is statically defined and handle in | |
909 | * vmbus_bus_exit() | |
910 | */ | |
3e7ee490 HJ |
911 | return 0; |
912 | } | |
913 | ||
90c9960e | 914 | if (child_device->driver) { |
150f9398 | 915 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 916 | |
90c9960e GKH |
917 | /* |
918 | * Let the specific open-source driver handles the removal if | |
919 | * it can | |
920 | */ | |
150f9398 S |
921 | if (drv->driver.remove) { |
922 | ret = drv->driver.remove(child_device); | |
90c9960e GKH |
923 | } else { |
924 | DPRINT_ERR(VMBUS_DRV, | |
925 | "remove() method not set for driver - %s", | |
926 | child_device->driver->name); | |
3e7ee490 HJ |
927 | ret = -1; |
928 | } | |
929 | } | |
3e7ee490 | 930 | |
3e7ee490 HJ |
931 | return 0; |
932 | } | |
933 | ||
3e189519 | 934 | /* |
90c9960e GKH |
935 | * vmbus_shutdown - Shutdown a vmbus device |
936 | */ | |
3e7ee490 HJ |
937 | static void vmbus_shutdown(struct device *child_device) |
938 | { | |
150f9398 | 939 | struct hv_driver *drv; |
3e7ee490 | 940 | |
454f18a9 | 941 | /* Special case root bus device */ |
90c9960e GKH |
942 | if (child_device->parent == NULL) { |
943 | /* | |
944 | * No-op since it is statically defined and handle in | |
945 | * vmbus_bus_exit() | |
946 | */ | |
3e7ee490 HJ |
947 | return; |
948 | } | |
949 | ||
454f18a9 | 950 | /* The device may not be attached yet */ |
83c720ea | 951 | if (!child_device->driver) |
3e7ee490 | 952 | return; |
3e7ee490 | 953 | |
150f9398 | 954 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 955 | |
454f18a9 | 956 | /* Let the specific open-source driver handles the removal if it can */ |
150f9398 S |
957 | if (drv->driver.shutdown) |
958 | drv->driver.shutdown(child_device); | |
3e7ee490 | 959 | |
3e7ee490 HJ |
960 | return; |
961 | } | |
962 | ||
3e189519 | 963 | /* |
90c9960e GKH |
964 | * vmbus_bus_release - Final callback release of the vmbus root device |
965 | */ | |
3e7ee490 HJ |
966 | static void vmbus_bus_release(struct device *device) |
967 | { | |
689bf406 GKH |
968 | /* FIXME */ |
969 | /* Empty release functions are a bug, or a major sign | |
970 | * of a problem design, this MUST BE FIXED! */ | |
971 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
972 | WARN_ON(1); | |
3e7ee490 HJ |
973 | } |
974 | ||
3e189519 | 975 | /* |
90c9960e GKH |
976 | * vmbus_device_release - Final callback release of the vmbus child device |
977 | */ | |
3e7ee490 HJ |
978 | static void vmbus_device_release(struct device *device) |
979 | { | |
6bad88da | 980 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 981 | |
3e7ee490 HJ |
982 | kfree(device_ctx); |
983 | ||
454f18a9 | 984 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
985 | } |
986 | ||
3e7ee490 | 987 | |
3e189519 | 988 | /* |
4a1494fc | 989 | * vmbus_event_dpc - Tasklet routine to handle hypervisor events |
90c9960e | 990 | */ |
3e7ee490 HJ |
991 | static void vmbus_event_dpc(unsigned long data) |
992 | { | |
454f18a9 | 993 | /* Call to bus driver to handle interrupt */ |
c6977677 | 994 | vmbus_on_event(); |
3e7ee490 HJ |
995 | } |
996 | ||
90c9960e | 997 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 998 | { |
90c9960e | 999 | int ret; |
3e7ee490 | 1000 | |
454f18a9 | 1001 | /* Call to bus driver to handle interrupt */ |
a6e4d8e3 | 1002 | ret = vmbus_on_isr(NULL); |
3e7ee490 | 1003 | |
454f18a9 | 1004 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
1005 | if (ret > 0) { |
1006 | if (test_bit(0, (unsigned long *)&ret)) | |
adf874cb | 1007 | tasklet_schedule(&vmbus_drv.msg_dpc); |
3e7ee490 | 1008 | |
90c9960e | 1009 | if (test_bit(1, (unsigned long *)&ret)) |
adf874cb | 1010 | tasklet_schedule(&vmbus_drv.event_dpc); |
3e7ee490 | 1011 | |
3e7ee490 | 1012 | return IRQ_HANDLED; |
90c9960e | 1013 | } else { |
3e7ee490 HJ |
1014 | return IRQ_NONE; |
1015 | } | |
1016 | } | |
1017 | ||
c22090fa GKH |
1018 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
1019 | { | |
1020 | .ident = "Hyper-V", | |
1021 | .matches = { | |
1022 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
1023 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
1024 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
1025 | }, | |
1026 | }, | |
1027 | { }, | |
1028 | }; | |
1029 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
1030 | ||
3e7ee490 HJ |
1031 | static int __init vmbus_init(void) |
1032 | { | |
3e7ee490 HJ |
1033 | DPRINT_INFO(VMBUS_DRV, |
1034 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
1035 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 1036 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 1037 | |
c22090fa GKH |
1038 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
1039 | return -ENODEV; | |
1040 | ||
6c884555 | 1041 | return vmbus_bus_init(); |
3e7ee490 HJ |
1042 | } |
1043 | ||
3e7ee490 HJ |
1044 | static void __exit vmbus_exit(void) |
1045 | { | |
3e7ee490 | 1046 | vmbus_bus_exit(); |
90c9960e | 1047 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1048 | } |
1049 | ||
9a775dbd GKH |
1050 | /* |
1051 | * We use a PCI table to determine if we should autoload this driver This is | |
1052 | * needed by distro tools to determine if the hyperv drivers should be | |
1053 | * installed and/or configured. We don't do anything else with the table, but | |
1054 | * it needs to be present. | |
9a775dbd | 1055 | */ |
15f0beb1 | 1056 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
1057 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
1058 | { 0 } | |
1059 | }; | |
1060 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1061 | ||
90c9960e | 1062 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1063 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1064 | module_param(vmbus_irq, int, S_IRUGO); |
1065 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1066 | |
1067 | module_init(vmbus_init); | |
1068 | module_exit(vmbus_exit); |