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_msg_dpc(unsigned long data); |
60 | static void vmbus_event_dpc(unsigned long data); | |
61 | ||
90c9960e | 62 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
3e7ee490 HJ |
63 | |
64 | static void vmbus_device_release(struct device *device); | |
65 | static void vmbus_bus_release(struct device *device); | |
66 | ||
90c9960e GKH |
67 | static ssize_t vmbus_show_device_attr(struct device *dev, |
68 | struct device_attribute *dev_attr, | |
69 | char *buf); | |
3e7ee490 | 70 | |
3e7ee490 | 71 | |
90c9960e | 72 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
3e7ee490 | 73 | EXPORT_SYMBOL(vmbus_loglevel); |
90c9960e GKH |
74 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
75 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ | |
3e7ee490 HJ |
76 | |
77 | static int vmbus_irq = VMBUS_IRQ; | |
78 | ||
454f18a9 | 79 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
3e7ee490 HJ |
80 | static struct device_attribute vmbus_device_attrs[] = { |
81 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), | |
82 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), | |
83 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
84 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
85 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
86 | ||
87 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
88 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
89 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
90 | ||
91 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), | |
92 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), | |
93 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), | |
94 | ||
95 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
96 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
97 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
98 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
99 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
100 | ||
101 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), | |
102 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
103 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), | |
104 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
105 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), | |
106 | __ATTR_NULL | |
107 | }; | |
3e7ee490 | 108 | |
454f18a9 | 109 | /* The one and only one */ |
adf874cb | 110 | static struct vmbus_driver_context vmbus_drv = { |
90c9960e GKH |
111 | .bus.name = "vmbus", |
112 | .bus.match = vmbus_match, | |
113 | .bus.shutdown = vmbus_shutdown, | |
114 | .bus.remove = vmbus_remove, | |
115 | .bus.probe = vmbus_probe, | |
116 | .bus.uevent = vmbus_uevent, | |
117 | .bus.dev_attrs = vmbus_device_attrs, | |
3e7ee490 HJ |
118 | }; |
119 | ||
adf874cb | 120 | static const char *driver_name = "hyperv"; |
36199a99 GKH |
121 | |
122 | /* | |
123 | * Windows vmbus does not defined this. | |
124 | * We defined this to be consistent with other devices | |
125 | */ | |
126 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
adf874cb | 127 | static const struct hv_guid device_type = { |
36199a99 GKH |
128 | .data = { |
129 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
130 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
131 | } | |
132 | }; | |
133 | ||
134 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ | |
adf874cb | 135 | static const struct hv_guid device_id = { |
36199a99 GKH |
136 | .data = { |
137 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
138 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
139 | } | |
140 | }; | |
141 | ||
adf874cb | 142 | static struct hv_device *vmbus_device; /* vmbus root device */ |
36199a99 GKH |
143 | |
144 | /* | |
646f1ea3 | 145 | * vmbus_child_dev_add - Registers the child device with the vmbus |
36199a99 | 146 | */ |
646f1ea3 | 147 | int vmbus_child_dev_add(struct hv_device *child_dev) |
36199a99 | 148 | { |
adf874cb | 149 | return vmbus_child_device_register(vmbus_device, child_dev); |
36199a99 GKH |
150 | } |
151 | ||
152 | /* | |
646f1ea3 | 153 | * vmbus_dev_add - Callback when the root bus device is added |
36199a99 | 154 | */ |
646f1ea3 | 155 | static int vmbus_dev_add(struct hv_device *dev, void *info) |
36199a99 | 156 | { |
adf874cb | 157 | u32 *irqvector = info; |
36199a99 GKH |
158 | int ret; |
159 | ||
adf874cb | 160 | vmbus_device = dev; |
36199a99 | 161 | |
ca623ad3 HZ |
162 | memcpy(&vmbus_device->dev_type, &device_type, sizeof(struct hv_guid)); |
163 | memcpy(&vmbus_device->dev_instance, &device_id, | |
36199a99 GKH |
164 | sizeof(struct hv_guid)); |
165 | ||
166 | /* strcpy(dev->name, "vmbus"); */ | |
167 | /* SynIC setup... */ | |
168 | on_each_cpu(hv_synic_init, (void *)irqvector, 1); | |
169 | ||
170 | /* Connect to VMBus in the root partition */ | |
c6977677 | 171 | ret = vmbus_connect(); |
36199a99 GKH |
172 | |
173 | /* VmbusSendEvent(device->localPortId+1); */ | |
174 | return ret; | |
175 | } | |
176 | ||
177 | /* | |
646f1ea3 | 178 | * vmbus_dev_rm - Callback when the root bus device is removed |
36199a99 | 179 | */ |
646f1ea3 | 180 | static int vmbus_dev_rm(struct hv_device *dev) |
36199a99 GKH |
181 | { |
182 | int ret = 0; | |
183 | ||
184 | vmbus_release_unattached_channels(); | |
c6977677 | 185 | vmbus_disconnect(); |
36199a99 GKH |
186 | on_each_cpu(hv_synic_cleanup, NULL, 1); |
187 | return ret; | |
188 | } | |
189 | ||
190 | /* | |
646f1ea3 | 191 | * vmbus_cleanup - Perform any cleanup when the driver is removed |
36199a99 | 192 | */ |
21ec2de2 | 193 | static void vmbus_cleanup(void) |
36199a99 | 194 | { |
36199a99 GKH |
195 | |
196 | hv_cleanup(); | |
197 | } | |
198 | ||
bf6506f6 TT |
199 | struct onmessage_work_context { |
200 | struct work_struct work; | |
201 | struct hv_message msg; | |
202 | }; | |
203 | ||
204 | static void vmbus_onmessage_work(struct work_struct *work) | |
205 | { | |
206 | struct onmessage_work_context *ctx; | |
207 | ||
208 | ctx = container_of(work, struct onmessage_work_context, | |
209 | work); | |
210 | vmbus_onmessage(&ctx->msg); | |
211 | kfree(ctx); | |
212 | } | |
213 | ||
36199a99 GKH |
214 | /* |
215 | * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior | |
216 | */ | |
cef6dbfa | 217 | static void vmbus_on_msg_dpc(struct hv_driver *drv) |
36199a99 GKH |
218 | { |
219 | int cpu = smp_processor_id(); | |
220 | void *page_addr = hv_context.synic_message_page[cpu]; | |
221 | struct hv_message *msg = (struct hv_message *)page_addr + | |
222 | VMBUS_MESSAGE_SINT; | |
bf6506f6 | 223 | struct onmessage_work_context *ctx; |
36199a99 GKH |
224 | |
225 | while (1) { | |
226 | if (msg->header.message_type == HVMSG_NONE) { | |
227 | /* no msg */ | |
228 | break; | |
229 | } else { | |
bf6506f6 TT |
230 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
231 | if (ctx == NULL) | |
36199a99 | 232 | continue; |
bf6506f6 TT |
233 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
234 | memcpy(&ctx->msg, msg, sizeof(*msg)); | |
da9fcb72 | 235 | queue_work(vmbus_connection.work_queue, &ctx->work); |
36199a99 GKH |
236 | } |
237 | ||
238 | msg->header.message_type = HVMSG_NONE; | |
239 | ||
240 | /* | |
241 | * Make sure the write to MessageType (ie set to | |
242 | * HVMSG_NONE) happens before we read the | |
243 | * MessagePending and EOMing. Otherwise, the EOMing | |
244 | * will not deliver any more messages since there is | |
245 | * no empty slot | |
246 | */ | |
247 | mb(); | |
248 | ||
249 | if (msg->header.message_flags.msg_pending) { | |
250 | /* | |
251 | * This will cause message queue rescan to | |
252 | * possibly deliver another msg from the | |
253 | * hypervisor | |
254 | */ | |
255 | wrmsrl(HV_X64_MSR_EOM, 0); | |
256 | } | |
257 | } | |
258 | } | |
259 | ||
36199a99 GKH |
260 | /* |
261 | * vmbus_on_isr - ISR routine | |
262 | */ | |
cef6dbfa | 263 | static int vmbus_on_isr(struct hv_driver *drv) |
36199a99 GKH |
264 | { |
265 | int ret = 0; | |
266 | int cpu = smp_processor_id(); | |
267 | void *page_addr; | |
268 | struct hv_message *msg; | |
269 | union hv_synic_event_flags *event; | |
270 | ||
271 | page_addr = hv_context.synic_message_page[cpu]; | |
272 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; | |
273 | ||
274 | /* Check if there are actual msgs to be process */ | |
275 | if (msg->header.message_type != HVMSG_NONE) { | |
276 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
277 | msg->header.message_type, | |
278 | msg->header.payload_size); | |
279 | ret |= 0x1; | |
280 | } | |
281 | ||
282 | /* TODO: Check if there are events to be process */ | |
283 | page_addr = hv_context.synic_event_page[cpu]; | |
284 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; | |
285 | ||
286 | /* Since we are a child, we only need to check bit 0 */ | |
287 | if (test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) { | |
288 | DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]); | |
289 | ret |= 0x2; | |
290 | } | |
291 | ||
292 | return ret; | |
293 | } | |
294 | ||
150b19d4 GKH |
295 | static void get_channel_info(struct hv_device *device, |
296 | struct hv_device_info *info) | |
297 | { | |
298 | struct vmbus_channel_debug_info debug_info; | |
299 | ||
cae5b843 | 300 | if (!device->channel) |
150b19d4 GKH |
301 | return; |
302 | ||
cae5b843 | 303 | vmbus_get_debug_info(device->channel, &debug_info); |
150b19d4 | 304 | |
ca623ad3 HZ |
305 | info->chn_id = debug_info.relid; |
306 | info->chn_state = debug_info.state; | |
307 | memcpy(&info->chn_type, &debug_info.interfacetype, | |
150b19d4 | 308 | sizeof(struct hv_guid)); |
ca623ad3 | 309 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
150b19d4 GKH |
310 | sizeof(struct hv_guid)); |
311 | ||
ca623ad3 | 312 | info->monitor_id = debug_info.monitorid; |
150b19d4 | 313 | |
ca623ad3 HZ |
314 | info->server_monitor_pending = debug_info.servermonitor_pending; |
315 | info->server_monitor_latency = debug_info.servermonitor_latency; | |
316 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; | |
150b19d4 | 317 | |
ca623ad3 HZ |
318 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
319 | info->client_monitor_latency = debug_info.clientmonitor_latency; | |
320 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; | |
150b19d4 | 321 | |
ca623ad3 HZ |
322 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
323 | info->inbound.read_idx = debug_info.inbound.current_read_index; | |
324 | info->inbound.write_idx = debug_info.inbound.current_write_index; | |
325 | info->inbound.bytes_avail_toread = | |
326 | debug_info.inbound.bytes_avail_toread; | |
327 | info->inbound.bytes_avail_towrite = | |
82f8bd40 HZ |
328 | debug_info.inbound.bytes_avail_towrite; |
329 | ||
ca623ad3 | 330 | info->outbound.int_mask = |
82f8bd40 | 331 | debug_info.outbound.current_interrupt_mask; |
ca623ad3 HZ |
332 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
333 | info->outbound.write_idx = debug_info.outbound.current_write_index; | |
334 | info->outbound.bytes_avail_toread = | |
82f8bd40 | 335 | debug_info.outbound.bytes_avail_toread; |
ca623ad3 | 336 | info->outbound.bytes_avail_towrite = |
82f8bd40 | 337 | debug_info.outbound.bytes_avail_towrite; |
150b19d4 GKH |
338 | } |
339 | ||
3e189519 | 340 | /* |
90c9960e GKH |
341 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
342 | * | |
343 | * This is invoked when user does a | |
344 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" | |
345 | */ | |
346 | static ssize_t vmbus_show_device_attr(struct device *dev, | |
347 | struct device_attribute *dev_attr, | |
348 | char *buf) | |
3e7ee490 | 349 | { |
6bad88da | 350 | struct hv_device *device_ctx = device_to_hv_device(dev); |
ee3d7ddf | 351 | struct hv_device_info device_info; |
3e7ee490 | 352 | |
ee3d7ddf | 353 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
3e7ee490 | 354 | |
6bad88da | 355 | get_channel_info(device_ctx, &device_info); |
3e7ee490 | 356 | |
90c9960e GKH |
357 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
358 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
359 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
360 | device_info.chn_type.data[3], |
361 | device_info.chn_type.data[2], | |
362 | device_info.chn_type.data[1], | |
363 | device_info.chn_type.data[0], | |
364 | device_info.chn_type.data[5], | |
365 | device_info.chn_type.data[4], | |
366 | device_info.chn_type.data[7], | |
367 | device_info.chn_type.data[6], | |
368 | device_info.chn_type.data[8], | |
369 | device_info.chn_type.data[9], | |
370 | device_info.chn_type.data[10], | |
371 | device_info.chn_type.data[11], | |
372 | device_info.chn_type.data[12], | |
373 | device_info.chn_type.data[13], | |
374 | device_info.chn_type.data[14], | |
375 | device_info.chn_type.data[15]); | |
90c9960e GKH |
376 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
377 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
378 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", | |
ca623ad3 HZ |
379 | device_info.chn_instance.data[3], |
380 | device_info.chn_instance.data[2], | |
381 | device_info.chn_instance.data[1], | |
382 | device_info.chn_instance.data[0], | |
383 | device_info.chn_instance.data[5], | |
384 | device_info.chn_instance.data[4], | |
385 | device_info.chn_instance.data[7], | |
386 | device_info.chn_instance.data[6], | |
387 | device_info.chn_instance.data[8], | |
388 | device_info.chn_instance.data[9], | |
389 | device_info.chn_instance.data[10], | |
390 | device_info.chn_instance.data[11], | |
391 | device_info.chn_instance.data[12], | |
392 | device_info.chn_instance.data[13], | |
393 | device_info.chn_instance.data[14], | |
394 | device_info.chn_instance.data[15]); | |
90c9960e | 395 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
ca623ad3 | 396 | return sprintf(buf, "%d\n", device_info.chn_state); |
90c9960e | 397 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
ca623ad3 | 398 | return sprintf(buf, "%d\n", device_info.chn_id); |
90c9960e | 399 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
ca623ad3 | 400 | return sprintf(buf, "%d\n", device_info.outbound.int_mask); |
90c9960e | 401 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
ca623ad3 | 402 | return sprintf(buf, "%d\n", device_info.outbound.read_idx); |
90c9960e | 403 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
ca623ad3 | 404 | return sprintf(buf, "%d\n", device_info.outbound.write_idx); |
90c9960e GKH |
405 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
406 | return sprintf(buf, "%d\n", | |
ca623ad3 | 407 | device_info.outbound.bytes_avail_toread); |
90c9960e GKH |
408 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
409 | return sprintf(buf, "%d\n", | |
ca623ad3 | 410 | device_info.outbound.bytes_avail_towrite); |
90c9960e | 411 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
ca623ad3 | 412 | return sprintf(buf, "%d\n", device_info.inbound.int_mask); |
90c9960e | 413 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
ca623ad3 | 414 | return sprintf(buf, "%d\n", device_info.inbound.read_idx); |
90c9960e | 415 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
ca623ad3 | 416 | return sprintf(buf, "%d\n", device_info.inbound.write_idx); |
90c9960e GKH |
417 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
418 | return sprintf(buf, "%d\n", | |
ca623ad3 | 419 | device_info.inbound.bytes_avail_toread); |
90c9960e GKH |
420 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
421 | return sprintf(buf, "%d\n", | |
ca623ad3 | 422 | device_info.inbound.bytes_avail_towrite); |
90c9960e | 423 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
ca623ad3 | 424 | return sprintf(buf, "%d\n", device_info.monitor_id); |
90c9960e | 425 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
ca623ad3 | 426 | return sprintf(buf, "%d\n", device_info.server_monitor_pending); |
90c9960e | 427 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
ca623ad3 | 428 | return sprintf(buf, "%d\n", device_info.server_monitor_latency); |
90c9960e GKH |
429 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
430 | return sprintf(buf, "%d\n", | |
ca623ad3 | 431 | device_info.server_monitor_conn_id); |
90c9960e | 432 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
ca623ad3 | 433 | return sprintf(buf, "%d\n", device_info.client_monitor_pending); |
90c9960e | 434 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
ca623ad3 | 435 | return sprintf(buf, "%d\n", device_info.client_monitor_latency); |
90c9960e GKH |
436 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
437 | return sprintf(buf, "%d\n", | |
ca623ad3 | 438 | device_info.client_monitor_conn_id); |
90c9960e | 439 | } else { |
3e7ee490 HJ |
440 | return 0; |
441 | } | |
442 | } | |
443 | ||
3e189519 | 444 | /* |
90c9960e GKH |
445 | * vmbus_bus_init -Main vmbus driver initialization routine. |
446 | * | |
447 | * Here, we | |
0686e4f4 LL |
448 | * - initialize the vmbus driver context |
449 | * - setup various driver entry points | |
450 | * - invoke the vmbus hv main init routine | |
451 | * - get the irq resource | |
452 | * - invoke the vmbus to add the vmbus root device | |
453 | * - setup the vmbus root device | |
454 | * - retrieve the channel offers | |
90c9960e | 455 | */ |
6c884555 | 456 | static int vmbus_bus_init(void) |
3e7ee490 | 457 | { |
adf874cb | 458 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
6bad88da | 459 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
90c9960e GKH |
460 | int ret; |
461 | unsigned int vector; | |
3e7ee490 | 462 | |
6d26e38f GKH |
463 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
464 | HV_DRV_VERSION); | |
465 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", | |
466 | VMBUS_REVISION_NUMBER); | |
467 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
468 | VMBUS_MESSAGE_SINT); | |
469 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " | |
470 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", | |
471 | sizeof(struct vmbus_channel_packet_page_buffer), | |
472 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
473 | ||
6d26e38f GKH |
474 | |
475 | /* Hypervisor initialization...setup hypercall page..etc */ | |
476 | ret = hv_init(); | |
90c9960e | 477 | if (ret != 0) { |
6d26e38f GKH |
478 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", |
479 | ret); | |
3e7ee490 HJ |
480 | goto cleanup; |
481 | } | |
482 | ||
3e7ee490 | 483 | |
a6e4d8e3 | 484 | vmbus_drv_ctx->bus.name = driver_name; |
3e7ee490 | 485 | |
454f18a9 | 486 | /* Initialize the bus context */ |
90c9960e | 487 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
a6e4d8e3 | 488 | (unsigned long)NULL); |
90c9960e | 489 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, |
a6e4d8e3 | 490 | (unsigned long)NULL); |
3e7ee490 | 491 | |
a6e4d8e3 | 492 | /* Now, register the bus with LDM */ |
c19fbca3 | 493 | ret = bus_register(&vmbus_drv_ctx->bus); |
90c9960e | 494 | if (ret) { |
c19fbca3 BP |
495 | ret = -1; |
496 | goto cleanup; | |
497 | } | |
3e7ee490 | 498 | |
454f18a9 | 499 | /* Get the interrupt resource */ |
90c9960e | 500 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
a6e4d8e3 | 501 | driver_name, NULL); |
3e7ee490 | 502 | |
90c9960e GKH |
503 | if (ret != 0) { |
504 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", | |
505 | vmbus_irq); | |
3e7ee490 HJ |
506 | |
507 | bus_unregister(&vmbus_drv_ctx->bus); | |
508 | ||
509 | ret = -1; | |
510 | goto cleanup; | |
511 | } | |
3e7ee490 | 512 | vector = VMBUS_IRQ_VECTOR; |
3e7ee490 HJ |
513 | |
514 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); | |
515 | ||
a6e4d8e3 | 516 | /* Add the root device */ |
6bad88da | 517 | memset(dev_ctx, 0, sizeof(struct hv_device)); |
3e7ee490 | 518 | |
a6e4d8e3 | 519 | ret = vmbus_dev_add(dev_ctx, &vector); |
90c9960e GKH |
520 | if (ret != 0) { |
521 | DPRINT_ERR(VMBUS_DRV, | |
522 | "ERROR - Unable to add vmbus root device"); | |
3e7ee490 HJ |
523 | |
524 | free_irq(vmbus_irq, NULL); | |
525 | ||
526 | bus_unregister(&vmbus_drv_ctx->bus); | |
527 | ||
528 | ret = -1; | |
529 | goto cleanup; | |
530 | } | |
454f18a9 | 531 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
09d50ff8 | 532 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
3e7ee490 | 533 | |
454f18a9 | 534 | /* No need to bind a driver to the root device. */ |
3e7ee490 | 535 | dev_ctx->device.parent = NULL; |
90c9960e GKH |
536 | /* NULL; vmbus_remove() does not get invoked */ |
537 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; | |
3e7ee490 | 538 | |
454f18a9 | 539 | /* Setup the device dispatch table */ |
3e7ee490 HJ |
540 | dev_ctx->device.release = vmbus_bus_release; |
541 | ||
a6e4d8e3 | 542 | /* register the root device */ |
5d48a1c2 | 543 | ret = device_register(&dev_ctx->device); |
90c9960e GKH |
544 | if (ret) { |
545 | DPRINT_ERR(VMBUS_DRV, | |
546 | "ERROR - Unable to register vmbus root device"); | |
5d48a1c2 BP |
547 | |
548 | free_irq(vmbus_irq, NULL); | |
549 | bus_unregister(&vmbus_drv_ctx->bus); | |
550 | ||
551 | ret = -1; | |
552 | goto cleanup; | |
553 | } | |
554 | ||
2d6e882b | 555 | vmbus_request_offers(); |
8b5d6d3b HZ |
556 | wait_for_completion(&hv_channel_ready); |
557 | ||
3e7ee490 | 558 | cleanup: |
3e7ee490 HJ |
559 | return ret; |
560 | } | |
561 | ||
3e189519 | 562 | /* |
90c9960e GKH |
563 | * vmbus_bus_exit - Terminate the vmbus driver. |
564 | * | |
565 | * This routine is opposite of vmbus_bus_init() | |
566 | */ | |
bd1de709 | 567 | static void vmbus_bus_exit(void) |
3e7ee490 | 568 | { |
adf874cb | 569 | struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv; |
3e7ee490 | 570 | |
6bad88da | 571 | struct hv_device *dev_ctx = &vmbus_drv.device_ctx; |
3e7ee490 | 572 | |
454f18a9 | 573 | /* Remove the root device */ |
a6e4d8e3 | 574 | vmbus_dev_rm(dev_ctx); |
3e7ee490 | 575 | |
21ec2de2 | 576 | vmbus_cleanup(); |
3e7ee490 | 577 | |
454f18a9 | 578 | /* Unregister the root bus device */ |
3e7ee490 HJ |
579 | device_unregister(&dev_ctx->device); |
580 | ||
581 | bus_unregister(&vmbus_drv_ctx->bus); | |
582 | ||
583 | free_irq(vmbus_irq, NULL); | |
584 | ||
585 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); | |
586 | tasklet_kill(&vmbus_drv_ctx->event_dpc); | |
3e7ee490 HJ |
587 | } |
588 | ||
3e189519 | 589 | |
90c9960e | 590 | /** |
3e189519 | 591 | * vmbus_child_driver_register() - Register a vmbus's child driver |
c643269d | 592 | * @drv: Pointer to driver structure you want to register |
3e189519 | 593 | * |
3e189519 HJ |
594 | * |
595 | * Registers the given driver with Linux through the 'driver_register()' call | |
596 | * And sets up the hyper-v vmbus handling for this driver. | |
597 | * It will return the state of the 'driver_register()' call. | |
598 | * | |
599 | * Mainly used by Hyper-V drivers. | |
90c9960e | 600 | */ |
c643269d | 601 | int vmbus_child_driver_register(struct device_driver *drv) |
3e7ee490 | 602 | { |
5d48a1c2 | 603 | int ret; |
3e7ee490 | 604 | |
90c9960e | 605 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
c643269d | 606 | drv, drv->name); |
3e7ee490 | 607 | |
454f18a9 | 608 | /* The child driver on this vmbus */ |
c643269d | 609 | drv->bus = &vmbus_drv.bus; |
3e7ee490 | 610 | |
c643269d | 611 | ret = driver_register(drv); |
3e7ee490 | 612 | |
2d6e882b | 613 | vmbus_request_offers(); |
3e7ee490 | 614 | |
5d48a1c2 | 615 | return ret; |
3e7ee490 | 616 | } |
3e7ee490 HJ |
617 | EXPORT_SYMBOL(vmbus_child_driver_register); |
618 | ||
90c9960e | 619 | /** |
3e189519 | 620 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
06de23f7 | 621 | * @drv: Pointer to driver structure you want to un-register |
3e189519 | 622 | * |
3e189519 HJ |
623 | * |
624 | * Un-register the given driver with Linux through the 'driver_unregister()' | |
625 | * call. And ungegisters the driver from the Hyper-V vmbus handler. | |
626 | * | |
627 | * Mainly used by Hyper-V drivers. | |
90c9960e | 628 | */ |
06de23f7 | 629 | void vmbus_child_driver_unregister(struct device_driver *drv) |
3e7ee490 | 630 | { |
90c9960e | 631 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
06de23f7 | 632 | drv, drv->name); |
3e7ee490 | 633 | |
06de23f7 | 634 | driver_unregister(drv); |
3e7ee490 | 635 | |
06de23f7 | 636 | drv->bus = NULL; |
3e7ee490 | 637 | } |
3e7ee490 HJ |
638 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
639 | ||
3e189519 HJ |
640 | /* |
641 | * vmbus_child_device_create - Creates and registers a new child device | |
642 | * on the vmbus. | |
90c9960e | 643 | */ |
89733aa9 GKH |
644 | struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
645 | struct hv_guid *instance, | |
646 | struct vmbus_channel *channel) | |
3e7ee490 | 647 | { |
3d3b5518 | 648 | struct hv_device *child_device_obj; |
3e7ee490 | 649 | |
454f18a9 | 650 | /* Allocate the new child device */ |
6bad88da S |
651 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
652 | if (!child_device_obj) { | |
90c9960e GKH |
653 | DPRINT_ERR(VMBUS_DRV, |
654 | "unable to allocate device_context for child device"); | |
3e7ee490 HJ |
655 | return NULL; |
656 | } | |
657 | ||
658 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " | |
90c9960e GKH |
659 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
660 | "%02x%02x%02x%02x%02x%02x%02x%02x}," | |
661 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
662 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
6bad88da | 663 | &child_device_obj->device, |
daaa8cc3 GKH |
664 | type->data[3], type->data[2], type->data[1], type->data[0], |
665 | type->data[5], type->data[4], type->data[7], type->data[6], | |
666 | type->data[8], type->data[9], type->data[10], type->data[11], | |
667 | type->data[12], type->data[13], type->data[14], type->data[15], | |
90c9960e GKH |
668 | instance->data[3], instance->data[2], |
669 | instance->data[1], instance->data[0], | |
670 | instance->data[5], instance->data[4], | |
671 | instance->data[7], instance->data[6], | |
672 | instance->data[8], instance->data[9], | |
673 | instance->data[10], instance->data[11], | |
674 | instance->data[12], instance->data[13], | |
675 | instance->data[14], instance->data[15]); | |
3e7ee490 | 676 | |
cae5b843 | 677 | child_device_obj->channel = channel; |
ca623ad3 HZ |
678 | memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid)); |
679 | memcpy(&child_device_obj->dev_instance, instance, | |
90c9960e | 680 | sizeof(struct hv_guid)); |
3e7ee490 | 681 | |
3e7ee490 | 682 | |
3e7ee490 HJ |
683 | return child_device_obj; |
684 | } | |
685 | ||
3e189519 | 686 | /* |
90c9960e GKH |
687 | * vmbus_child_device_register - Register the child device on the specified bus |
688 | */ | |
98293a27 GKH |
689 | int vmbus_child_device_register(struct hv_device *root_device_obj, |
690 | struct hv_device *child_device_obj) | |
3e7ee490 | 691 | { |
90c9960e | 692 | int ret = 0; |
6bad88da | 693 | |
f4888417 | 694 | static atomic_t device_num = ATOMIC_INIT(0); |
3e7ee490 | 695 | |
90c9960e | 696 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
6bad88da | 697 | child_device_obj); |
454f18a9 | 698 | |
1bb40a25 | 699 | /* Set the device name. Otherwise, device_register() will fail. */ |
6bad88da | 700 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
90c9960e | 701 | atomic_inc_return(&device_num)); |
3e7ee490 | 702 | |
454f18a9 | 703 | /* The new device belongs to this bus */ |
6bad88da S |
704 | child_device_obj->device.bus = &vmbus_drv.bus; /* device->dev.bus; */ |
705 | child_device_obj->device.parent = &root_device_obj->device; | |
706 | child_device_obj->device.release = vmbus_device_release; | |
3e7ee490 | 707 | |
90c9960e GKH |
708 | /* |
709 | * Register with the LDM. This will kick off the driver/device | |
710 | * binding...which will eventually call vmbus_match() and vmbus_probe() | |
711 | */ | |
6bad88da | 712 | ret = device_register(&child_device_obj->device); |
3e7ee490 | 713 | |
454f18a9 | 714 | /* vmbus_probe() error does not get propergate to device_register(). */ |
6bad88da | 715 | ret = child_device_obj->probe_error; |
3e7ee490 HJ |
716 | |
717 | if (ret) | |
90c9960e | 718 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
6bad88da | 719 | &child_device_obj->device); |
3e7ee490 | 720 | else |
90c9960e | 721 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
6bad88da | 722 | &child_device_obj->device); |
3e7ee490 | 723 | |
3e7ee490 HJ |
724 | return ret; |
725 | } | |
726 | ||
3e189519 HJ |
727 | /* |
728 | * vmbus_child_device_unregister - Remove the specified child device | |
729 | * from the vmbus. | |
90c9960e | 730 | */ |
9d8bd71a | 731 | void vmbus_child_device_unregister(struct hv_device *device_obj) |
3e7ee490 | 732 | { |
3e7ee490 | 733 | |
90c9960e | 734 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
6bad88da | 735 | &device_obj->device); |
3e7ee490 | 736 | |
90c9960e GKH |
737 | /* |
738 | * Kick off the process of unregistering the device. | |
739 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
740 | */ | |
6bad88da | 741 | device_unregister(&device_obj->device); |
3e7ee490 | 742 | |
90c9960e | 743 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
6bad88da | 744 | &device_obj->device); |
3e7ee490 HJ |
745 | } |
746 | ||
3e189519 | 747 | /* |
90c9960e GKH |
748 | * vmbus_uevent - add uevent for our device |
749 | * | |
750 | * This routine is invoked when a device is added or removed on the vmbus to | |
751 | * generate a uevent to udev in the userspace. The udev will then look at its | |
752 | * rule and the uevent generated here to load the appropriate driver | |
753 | */ | |
3e7ee490 HJ |
754 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
755 | { | |
6bad88da | 756 | struct hv_device *dev = device_to_hv_device(device); |
3e7ee490 HJ |
757 | int ret; |
758 | ||
90c9960e GKH |
759 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
760 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
761 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
762 | dev->dev_type.data[3], dev->dev_type.data[2], |
763 | dev->dev_type.data[1], dev->dev_type.data[0], | |
764 | dev->dev_type.data[5], dev->dev_type.data[4], | |
765 | dev->dev_type.data[7], dev->dev_type.data[6], | |
766 | dev->dev_type.data[8], dev->dev_type.data[9], | |
767 | dev->dev_type.data[10], | |
768 | dev->dev_type.data[11], | |
769 | dev->dev_type.data[12], | |
770 | dev->dev_type.data[13], | |
771 | dev->dev_type.data[14], | |
772 | dev->dev_type.data[15]); | |
3e7ee490 | 773 | |
90c9960e GKH |
774 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
775 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
776 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
65c22791 S |
777 | dev->dev_type.data[3], |
778 | dev->dev_type.data[2], | |
779 | dev->dev_type.data[1], | |
780 | dev->dev_type.data[0], | |
781 | dev->dev_type.data[5], | |
782 | dev->dev_type.data[4], | |
783 | dev->dev_type.data[7], | |
784 | dev->dev_type.data[6], | |
785 | dev->dev_type.data[8], | |
786 | dev->dev_type.data[9], | |
787 | dev->dev_type.data[10], | |
788 | dev->dev_type.data[11], | |
789 | dev->dev_type.data[12], | |
790 | dev->dev_type.data[13], | |
791 | dev->dev_type.data[14], | |
792 | dev->dev_type.data[15]); | |
3e7ee490 HJ |
793 | |
794 | if (ret) | |
3e7ee490 | 795 | return ret; |
3e7ee490 | 796 | |
90c9960e GKH |
797 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
798 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
799 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
d5889771 S |
800 | dev->dev_instance.data[3], |
801 | dev->dev_instance.data[2], | |
802 | dev->dev_instance.data[1], | |
803 | dev->dev_instance.data[0], | |
804 | dev->dev_instance.data[5], | |
805 | dev->dev_instance.data[4], | |
806 | dev->dev_instance.data[7], | |
807 | dev->dev_instance.data[6], | |
808 | dev->dev_instance.data[8], | |
809 | dev->dev_instance.data[9], | |
810 | dev->dev_instance.data[10], | |
811 | dev->dev_instance.data[11], | |
812 | dev->dev_instance.data[12], | |
813 | dev->dev_instance.data[13], | |
814 | dev->dev_instance.data[14], | |
815 | dev->dev_instance.data[15]); | |
3e7ee490 | 816 | if (ret) |
3e7ee490 | 817 | return ret; |
3e7ee490 | 818 | |
3e7ee490 HJ |
819 | return 0; |
820 | } | |
821 | ||
3e189519 | 822 | /* |
90c9960e GKH |
823 | * vmbus_match - Attempt to match the specified device to the specified driver |
824 | */ | |
3e7ee490 HJ |
825 | static int vmbus_match(struct device *device, struct device_driver *driver) |
826 | { | |
90c9960e | 827 | int match = 0; |
150f9398 | 828 | struct hv_driver *drv = drv_to_hv_drv(driver); |
6bad88da | 829 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 830 | |
454f18a9 | 831 | /* We found our driver ? */ |
6bad88da | 832 | if (memcmp(&device_ctx->dev_type, &drv->dev_type, |
90c9960e | 833 | sizeof(struct hv_guid)) == 0) { |
90c9960e | 834 | |
6bad88da | 835 | device_ctx->drv = drv->priv; |
90c9960e GKH |
836 | DPRINT_INFO(VMBUS_DRV, |
837 | "device object (%p) set to driver object (%p)", | |
6bad88da S |
838 | &device_ctx, |
839 | device_ctx->drv); | |
3e7ee490 HJ |
840 | |
841 | match = 1; | |
842 | } | |
3e7ee490 HJ |
843 | return match; |
844 | } | |
845 | ||
3e189519 | 846 | /* |
90c9960e GKH |
847 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
848 | * | |
849 | * We need a callback because we cannot invoked device_unregister() inside | |
850 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() | |
851 | * i.e. we cannot call device_unregister() inside device_register() | |
852 | */ | |
3e7ee490 | 853 | static void vmbus_probe_failed_cb(struct work_struct *context) |
3e7ee490 | 854 | { |
6bad88da | 855 | struct hv_device *device_ctx = (struct hv_device *)context; |
3e7ee490 | 856 | |
90c9960e GKH |
857 | /* |
858 | * Kick off the process of unregistering the device. | |
859 | * This will call vmbus_remove() and eventually vmbus_device_release() | |
860 | */ | |
3e7ee490 HJ |
861 | device_unregister(&device_ctx->device); |
862 | ||
454f18a9 | 863 | /* put_device(&device_ctx->device); */ |
3e7ee490 HJ |
864 | } |
865 | ||
3e189519 | 866 | /* |
90c9960e GKH |
867 | * vmbus_probe - Add the new vmbus's child device |
868 | */ | |
3e7ee490 HJ |
869 | static int vmbus_probe(struct device *child_device) |
870 | { | |
90c9960e | 871 | int ret = 0; |
150f9398 S |
872 | struct hv_driver *drv = |
873 | drv_to_hv_drv(child_device->driver); | |
6bad88da | 874 | struct hv_device *dev = device_to_hv_device(child_device); |
3e7ee490 | 875 | |
454f18a9 | 876 | /* Let the specific open-source driver handles the probe if it can */ |
150f9398 | 877 | if (drv->driver.probe) { |
6bad88da | 878 | ret = dev->probe_error = |
150f9398 | 879 | drv->driver.probe(child_device); |
90c9960e GKH |
880 | if (ret != 0) { |
881 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " | |
882 | "(%p) on driver %s (%d)...", | |
883 | dev_name(child_device), child_device, | |
884 | child_device->driver->name, ret); | |
885 | ||
a3c7fe9a | 886 | INIT_WORK(&dev->probe_failed_work_item, |
90c9960e | 887 | vmbus_probe_failed_cb); |
a3c7fe9a | 888 | schedule_work(&dev->probe_failed_work_item); |
3e7ee490 | 889 | } |
90c9960e GKH |
890 | } else { |
891 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", | |
892 | child_device->driver->name); | |
3e7ee490 HJ |
893 | ret = -1; |
894 | } | |
3e7ee490 HJ |
895 | return ret; |
896 | } | |
897 | ||
3e189519 | 898 | /* |
90c9960e GKH |
899 | * vmbus_remove - Remove a vmbus device |
900 | */ | |
3e7ee490 HJ |
901 | static int vmbus_remove(struct device *child_device) |
902 | { | |
90c9960e | 903 | int ret; |
150f9398 | 904 | struct hv_driver *drv; |
3e7ee490 | 905 | |
454f18a9 | 906 | /* Special case root bus device */ |
90c9960e GKH |
907 | if (child_device->parent == NULL) { |
908 | /* | |
909 | * No-op since it is statically defined and handle in | |
910 | * vmbus_bus_exit() | |
911 | */ | |
3e7ee490 HJ |
912 | return 0; |
913 | } | |
914 | ||
90c9960e | 915 | if (child_device->driver) { |
150f9398 | 916 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 917 | |
90c9960e GKH |
918 | /* |
919 | * Let the specific open-source driver handles the removal if | |
920 | * it can | |
921 | */ | |
150f9398 S |
922 | if (drv->driver.remove) { |
923 | ret = drv->driver.remove(child_device); | |
90c9960e GKH |
924 | } else { |
925 | DPRINT_ERR(VMBUS_DRV, | |
926 | "remove() method not set for driver - %s", | |
927 | child_device->driver->name); | |
3e7ee490 HJ |
928 | ret = -1; |
929 | } | |
930 | } | |
3e7ee490 | 931 | |
3e7ee490 HJ |
932 | return 0; |
933 | } | |
934 | ||
3e189519 | 935 | /* |
90c9960e GKH |
936 | * vmbus_shutdown - Shutdown a vmbus device |
937 | */ | |
3e7ee490 HJ |
938 | static void vmbus_shutdown(struct device *child_device) |
939 | { | |
150f9398 | 940 | struct hv_driver *drv; |
3e7ee490 | 941 | |
454f18a9 | 942 | /* Special case root bus device */ |
90c9960e GKH |
943 | if (child_device->parent == NULL) { |
944 | /* | |
945 | * No-op since it is statically defined and handle in | |
946 | * vmbus_bus_exit() | |
947 | */ | |
3e7ee490 HJ |
948 | return; |
949 | } | |
950 | ||
454f18a9 | 951 | /* The device may not be attached yet */ |
83c720ea | 952 | if (!child_device->driver) |
3e7ee490 | 953 | return; |
3e7ee490 | 954 | |
150f9398 | 955 | drv = drv_to_hv_drv(child_device->driver); |
3e7ee490 | 956 | |
454f18a9 | 957 | /* Let the specific open-source driver handles the removal if it can */ |
150f9398 S |
958 | if (drv->driver.shutdown) |
959 | drv->driver.shutdown(child_device); | |
3e7ee490 | 960 | |
3e7ee490 HJ |
961 | return; |
962 | } | |
963 | ||
3e189519 | 964 | /* |
90c9960e GKH |
965 | * vmbus_bus_release - Final callback release of the vmbus root device |
966 | */ | |
3e7ee490 HJ |
967 | static void vmbus_bus_release(struct device *device) |
968 | { | |
689bf406 GKH |
969 | /* FIXME */ |
970 | /* Empty release functions are a bug, or a major sign | |
971 | * of a problem design, this MUST BE FIXED! */ | |
972 | dev_err(device, "%s needs to be fixed!\n", __func__); | |
973 | WARN_ON(1); | |
3e7ee490 HJ |
974 | } |
975 | ||
3e189519 | 976 | /* |
90c9960e GKH |
977 | * vmbus_device_release - Final callback release of the vmbus child device |
978 | */ | |
3e7ee490 HJ |
979 | static void vmbus_device_release(struct device *device) |
980 | { | |
6bad88da | 981 | struct hv_device *device_ctx = device_to_hv_device(device); |
3e7ee490 | 982 | |
3e7ee490 HJ |
983 | kfree(device_ctx); |
984 | ||
454f18a9 | 985 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
3e7ee490 HJ |
986 | } |
987 | ||
3e189519 | 988 | /* |
90c9960e GKH |
989 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
990 | */ | |
3e7ee490 HJ |
991 | static void vmbus_msg_dpc(unsigned long data) |
992 | { | |
a69a6691 | 993 | struct hv_driver *driver = (struct hv_driver *)data; |
3e7ee490 | 994 | |
454f18a9 | 995 | /* Call to bus driver to handle interrupt */ |
a69a6691 | 996 | vmbus_on_msg_dpc(driver); |
3e7ee490 HJ |
997 | } |
998 | ||
3e189519 | 999 | /* |
4a1494fc | 1000 | * vmbus_event_dpc - Tasklet routine to handle hypervisor events |
90c9960e | 1001 | */ |
3e7ee490 HJ |
1002 | static void vmbus_event_dpc(unsigned long data) |
1003 | { | |
454f18a9 | 1004 | /* Call to bus driver to handle interrupt */ |
c6977677 | 1005 | vmbus_on_event(); |
3e7ee490 HJ |
1006 | } |
1007 | ||
90c9960e | 1008 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
3e7ee490 | 1009 | { |
90c9960e | 1010 | int ret; |
3e7ee490 | 1011 | |
454f18a9 | 1012 | /* Call to bus driver to handle interrupt */ |
a6e4d8e3 | 1013 | ret = vmbus_on_isr(NULL); |
3e7ee490 | 1014 | |
454f18a9 | 1015 | /* Schedules a dpc if necessary */ |
90c9960e GKH |
1016 | if (ret > 0) { |
1017 | if (test_bit(0, (unsigned long *)&ret)) | |
adf874cb | 1018 | tasklet_schedule(&vmbus_drv.msg_dpc); |
3e7ee490 | 1019 | |
90c9960e | 1020 | if (test_bit(1, (unsigned long *)&ret)) |
adf874cb | 1021 | tasklet_schedule(&vmbus_drv.event_dpc); |
3e7ee490 | 1022 | |
3e7ee490 | 1023 | return IRQ_HANDLED; |
90c9960e | 1024 | } else { |
3e7ee490 HJ |
1025 | return IRQ_NONE; |
1026 | } | |
1027 | } | |
1028 | ||
c22090fa GKH |
1029 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
1030 | { | |
1031 | .ident = "Hyper-V", | |
1032 | .matches = { | |
1033 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
1034 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), | |
1035 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), | |
1036 | }, | |
1037 | }, | |
1038 | { }, | |
1039 | }; | |
1040 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); | |
1041 | ||
3e7ee490 HJ |
1042 | static int __init vmbus_init(void) |
1043 | { | |
3e7ee490 HJ |
1044 | DPRINT_INFO(VMBUS_DRV, |
1045 | "Vmbus initializing.... current log level 0x%x (%x,%x)", | |
1046 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); | |
90c9960e | 1047 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 | 1048 | |
c22090fa GKH |
1049 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
1050 | return -ENODEV; | |
1051 | ||
6c884555 | 1052 | return vmbus_bus_init(); |
3e7ee490 HJ |
1053 | } |
1054 | ||
3e7ee490 HJ |
1055 | static void __exit vmbus_exit(void) |
1056 | { | |
3e7ee490 | 1057 | vmbus_bus_exit(); |
90c9960e | 1058 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
3e7ee490 HJ |
1059 | } |
1060 | ||
9a775dbd GKH |
1061 | /* |
1062 | * We use a PCI table to determine if we should autoload this driver This is | |
1063 | * needed by distro tools to determine if the hyperv drivers should be | |
1064 | * installed and/or configured. We don't do anything else with the table, but | |
1065 | * it needs to be present. | |
9a775dbd | 1066 | */ |
15f0beb1 | 1067 | static const struct pci_device_id microsoft_hv_pci_table[] = { |
9a775dbd GKH |
1068 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
1069 | { 0 } | |
1070 | }; | |
1071 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); | |
1072 | ||
90c9960e | 1073 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1074 | MODULE_VERSION(HV_DRV_VERSION); |
3e7ee490 HJ |
1075 | module_param(vmbus_irq, int, S_IRUGO); |
1076 | module_param(vmbus_loglevel, int, S_IRUGO); | |
3e7ee490 HJ |
1077 | |
1078 | module_init(vmbus_init); | |
1079 | module_exit(vmbus_exit); |