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> | |
20 | * | |
21 | */ | |
5654e932 | 22 | #include <linux/kernel.h> |
0ffa63b0 | 23 | #include <linux/mm.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
4983b39a | 25 | #include "osd.h" |
645954c5 | 26 | #include "logging.h" |
2d82f6c7 | 27 | #include "version_info.h" |
72daf320 | 28 | #include "vmbus_private.h" |
3e7ee490 | 29 | |
772ec4e2 | 30 | static const char *gDriverName = "vmbus"; |
454f18a9 | 31 | |
772ec4e2 GKH |
32 | /* |
33 | * Windows vmbus does not defined this. | |
454f18a9 BP |
34 | * We defined this to be consistent with other devices |
35 | */ | |
36 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
caf26a31 GKH |
37 | static const struct hv_guid gVmbusDeviceType = { |
38 | .data = { | |
39 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
40 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
41 | } | |
3e7ee490 HJ |
42 | }; |
43 | ||
454f18a9 | 44 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ |
caf26a31 GKH |
45 | static const struct hv_guid gVmbusDeviceId = { |
46 | .data = { | |
47 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
48 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
49 | } | |
3e7ee490 HJ |
50 | }; |
51 | ||
775ef25e | 52 | static struct hv_driver *gDriver; /* vmbus driver object */ |
772ec4e2 | 53 | static struct hv_device *gDevice; /* vmbus root device */ |
3e7ee490 | 54 | |
3e189519 | 55 | /* |
772ec4e2 GKH |
56 | * VmbusGetChannelOffers - Retrieve the channel offers from the parent partition |
57 | */ | |
58 | static void VmbusGetChannelOffers(void) | |
3e7ee490 | 59 | { |
3e7ee490 | 60 | VmbusChannelRequestOffers(); |
3e7ee490 HJ |
61 | } |
62 | ||
3e189519 | 63 | /* |
772ec4e2 GKH |
64 | * VmbusGetChannelInfo - Get the device info for the specified device object |
65 | */ | |
66 | static void VmbusGetChannelInfo(struct hv_device *DeviceObject, | |
67 | struct hv_device_info *DeviceInfo) | |
3e7ee490 HJ |
68 | { |
69 | GetChannelInfo(DeviceObject, DeviceInfo); | |
70 | } | |
71 | ||
3e189519 | 72 | /* |
772ec4e2 GKH |
73 | * VmbusCreateChildDevice - Creates the child device on the bus that represents the channel offer |
74 | */ | |
daaa8cc3 GKH |
75 | struct hv_device *VmbusChildDeviceCreate(struct hv_guid *DeviceType, |
76 | struct hv_guid *DeviceInstance, | |
f346fdc2 | 77 | void *Context) |
3e7ee490 | 78 | { |
ee3d7ddf | 79 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
3e7ee490 | 80 | |
772ec4e2 GKH |
81 | return vmbusDriver->OnChildDeviceCreate(DeviceType, DeviceInstance, |
82 | Context); | |
3e7ee490 HJ |
83 | } |
84 | ||
3e189519 | 85 | /* |
772ec4e2 GKH |
86 | * VmbusChildDeviceAdd - Registers the child device with the vmbus |
87 | */ | |
f346fdc2 | 88 | int VmbusChildDeviceAdd(struct hv_device *ChildDevice) |
3e7ee490 | 89 | { |
ee3d7ddf | 90 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
3e7ee490 HJ |
91 | |
92 | return vmbusDriver->OnChildDeviceAdd(gDevice, ChildDevice); | |
93 | } | |
94 | ||
3e189519 | 95 | /* |
772ec4e2 GKH |
96 | * VmbusChildDeviceRemove Unregisters the child device from the vmbus |
97 | */ | |
f346fdc2 | 98 | void VmbusChildDeviceRemove(struct hv_device *ChildDevice) |
3e7ee490 | 99 | { |
ee3d7ddf | 100 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
3e7ee490 HJ |
101 | |
102 | vmbusDriver->OnChildDeviceRemove(ChildDevice); | |
103 | } | |
104 | ||
3e189519 | 105 | /* |
772ec4e2 GKH |
106 | * VmbusOnDeviceAdd - Callback when the root bus device is added |
107 | */ | |
108 | static int VmbusOnDeviceAdd(struct hv_device *dev, void *AdditionalInfo) | |
3e7ee490 | 109 | { |
772ec4e2 GKH |
110 | u32 *irqvector = AdditionalInfo; |
111 | int ret; | |
3e7ee490 | 112 | |
3e7ee490 HJ |
113 | gDevice = dev; |
114 | ||
caf26a31 | 115 | memcpy(&gDevice->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid)); |
772ec4e2 GKH |
116 | memcpy(&gDevice->deviceInstance, &gVmbusDeviceId, |
117 | sizeof(struct hv_guid)); | |
3e7ee490 | 118 | |
454f18a9 BP |
119 | /* strcpy(dev->name, "vmbus"); */ |
120 | /* SynIC setup... */ | |
7692fd4d | 121 | on_each_cpu(HvSynicInit, (void *)irqvector, 1); |
3e7ee490 | 122 | |
454f18a9 | 123 | /* Connect to VMBus in the root partition */ |
3e7ee490 HJ |
124 | ret = VmbusConnect(); |
125 | ||
454f18a9 | 126 | /* VmbusSendEvent(device->localPortId+1); */ |
3e7ee490 HJ |
127 | return ret; |
128 | } | |
129 | ||
3e189519 | 130 | /* |
772ec4e2 GKH |
131 | * VmbusOnDeviceRemove - Callback when the root bus device is removed |
132 | */ | |
133 | static int VmbusOnDeviceRemove(struct hv_device *dev) | |
3e7ee490 | 134 | { |
772ec4e2 | 135 | int ret = 0; |
3e7ee490 | 136 | |
3e7ee490 | 137 | VmbusChannelReleaseUnattachedChannels(); |
3e7ee490 | 138 | VmbusDisconnect(); |
7692fd4d | 139 | on_each_cpu(HvSynicCleanup, NULL, 1); |
3e7ee490 HJ |
140 | return ret; |
141 | } | |
142 | ||
3e189519 | 143 | /* |
772ec4e2 GKH |
144 | * VmbusOnCleanup - Perform any cleanup when the driver is removed |
145 | */ | |
146 | static void VmbusOnCleanup(struct hv_driver *drv) | |
3e7ee490 | 147 | { |
ee3d7ddf | 148 | /* struct vmbus_driver *driver = (struct vmbus_driver *)drv; */ |
3e7ee490 | 149 | |
3e7ee490 | 150 | HvCleanup(); |
3e7ee490 HJ |
151 | } |
152 | ||
3e189519 | 153 | /* |
772ec4e2 GKH |
154 | * VmbusOnMsgDPC - DPC routine to handle messages from the hypervisior |
155 | */ | |
156 | static void VmbusOnMsgDPC(struct hv_driver *drv) | |
3e7ee490 | 157 | { |
7692fd4d GKH |
158 | int cpu = smp_processor_id(); |
159 | void *page_addr = gHvContext.synICMessagePage[cpu]; | |
772ec4e2 GKH |
160 | struct hv_message *msg = (struct hv_message *)page_addr + |
161 | VMBUS_MESSAGE_SINT; | |
eacb1b4d | 162 | struct hv_message *copied; |
772ec4e2 GKH |
163 | |
164 | while (1) { | |
165 | if (msg->Header.MessageType == HvMessageTypeNone) { | |
166 | /* no msg */ | |
3e7ee490 | 167 | break; |
772ec4e2 | 168 | } else { |
94002c07 | 169 | copied = kmemdup(msg, sizeof(*copied), GFP_ATOMIC); |
3e7ee490 | 170 | if (copied == NULL) |
3e7ee490 | 171 | continue; |
3e7ee490 | 172 | |
de65a384 BP |
173 | osd_schedule_callback(gVmbusConnection.WorkQueue, |
174 | VmbusOnChannelMessage, | |
175 | (void *)copied); | |
3e7ee490 HJ |
176 | } |
177 | ||
178 | msg->Header.MessageType = HvMessageTypeNone; | |
179 | ||
454f18a9 BP |
180 | /* |
181 | * Make sure the write to MessageType (ie set to | |
182 | * HvMessageTypeNone) happens before we read the | |
183 | * MessagePending and EOMing. Otherwise, the EOMing | |
184 | * will not deliver any more messages since there is | |
185 | * no empty slot | |
186 | */ | |
28b6ca9c | 187 | mb(); |
3e7ee490 | 188 | |
772ec4e2 | 189 | if (msg->Header.MessageFlags.MessagePending) { |
454f18a9 BP |
190 | /* |
191 | * This will cause message queue rescan to | |
192 | * possibly deliver another msg from the | |
193 | * hypervisor | |
194 | */ | |
a51ed7d6 | 195 | wrmsrl(HV_X64_MSR_EOM, 0); |
3e7ee490 HJ |
196 | } |
197 | } | |
198 | } | |
199 | ||
3e189519 | 200 | /* |
772ec4e2 GKH |
201 | * VmbusOnEventDPC - DPC routine to handle events from the hypervisior |
202 | */ | |
203 | static void VmbusOnEventDPC(struct hv_driver *drv) | |
3e7ee490 | 204 | { |
454f18a9 | 205 | /* TODO: Process any events */ |
3e7ee490 HJ |
206 | VmbusOnEvents(); |
207 | } | |
208 | ||
3e189519 | 209 | /* |
772ec4e2 GKH |
210 | * VmbusOnISR - ISR routine |
211 | */ | |
212 | static int VmbusOnISR(struct hv_driver *drv) | |
3e7ee490 | 213 | { |
772ec4e2 | 214 | int ret = 0; |
7692fd4d | 215 | int cpu = smp_processor_id(); |
3e7ee490 | 216 | void *page_addr; |
eacb1b4d GKH |
217 | struct hv_message *msg; |
218 | union hv_synic_event_flags *event; | |
3e7ee490 | 219 | |
7692fd4d | 220 | page_addr = gHvContext.synICMessagePage[cpu]; |
eacb1b4d | 221 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
3e7ee490 | 222 | |
454f18a9 | 223 | /* Check if there are actual msgs to be process */ |
772ec4e2 GKH |
224 | if (msg->Header.MessageType != HvMessageTypeNone) { |
225 | DPRINT_DBG(VMBUS, "received msg type %d size %d", | |
226 | msg->Header.MessageType, | |
227 | msg->Header.PayloadSize); | |
3e7ee490 | 228 | ret |= 0x1; |
772ec4e2 | 229 | } |
3e7ee490 | 230 | |
454f18a9 | 231 | /* TODO: Check if there are events to be process */ |
7692fd4d | 232 | page_addr = gHvContext.synICEventPage[cpu]; |
eacb1b4d | 233 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; |
3e7ee490 | 234 | |
454f18a9 | 235 | /* Since we are a child, we only need to check bit 0 */ |
772ec4e2 | 236 | if (test_and_clear_bit(0, (unsigned long *) &event->Flags32[0])) { |
3e7ee490 HJ |
237 | DPRINT_DBG(VMBUS, "received event %d", event->Flags32[0]); |
238 | ret |= 0x2; | |
239 | } | |
240 | ||
3e7ee490 HJ |
241 | return ret; |
242 | } | |
b3bfb3ce | 243 | |
3e189519 | 244 | /* |
b3bfb3ce GKH |
245 | * VmbusInitialize - Main entry point |
246 | */ | |
247 | int VmbusInitialize(struct hv_driver *drv) | |
248 | { | |
249 | struct vmbus_driver *driver = (struct vmbus_driver *)drv; | |
250 | int ret; | |
251 | ||
26c14cc1 HJ |
252 | DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++", |
253 | HV_DRV_VERSION); | |
b3bfb3ce GKH |
254 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", |
255 | VMBUS_REVISION_NUMBER); | |
256 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", | |
257 | VMBUS_MESSAGE_SINT); | |
430a8e9a | 258 | DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, " |
b3bfb3ce | 259 | "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", |
430a8e9a HZ |
260 | sizeof(struct vmbus_channel_packet_page_buffer), |
261 | sizeof(struct vmbus_channel_packet_multipage_buffer)); | |
b3bfb3ce GKH |
262 | |
263 | drv->name = gDriverName; | |
264 | memcpy(&drv->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid)); | |
265 | ||
266 | /* Setup dispatch table */ | |
267 | driver->Base.OnDeviceAdd = VmbusOnDeviceAdd; | |
268 | driver->Base.OnDeviceRemove = VmbusOnDeviceRemove; | |
269 | driver->Base.OnCleanup = VmbusOnCleanup; | |
270 | driver->OnIsr = VmbusOnISR; | |
271 | driver->OnMsgDpc = VmbusOnMsgDPC; | |
272 | driver->OnEventDpc = VmbusOnEventDPC; | |
273 | driver->GetChannelOffers = VmbusGetChannelOffers; | |
b3bfb3ce GKH |
274 | driver->GetChannelInfo = VmbusGetChannelInfo; |
275 | ||
276 | /* Hypervisor initialization...setup hypercall page..etc */ | |
277 | ret = HvInit(); | |
278 | if (ret != 0) | |
279 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", | |
280 | ret); | |
281 | gDriver = drv; | |
282 | ||
b3bfb3ce GKH |
283 | return ret; |
284 | } |