Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 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> |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 20 | */ |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 22 | |
Greg Kroah-Hartman | a0086dc | 2009-08-17 17:22:08 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 24 | #include <linux/sched.h> |
| 25 | #include <linux/wait.h> |
Greg Kroah-Hartman | a0086dc | 2009-08-17 17:22:08 -0700 | [diff] [blame] | 26 | #include <linux/mm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 28 | #include <linux/list.h> |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 30 | #include <linux/completion.h> |
Greg Kroah-Hartman | 46a9719 | 2011-10-04 12:29:52 -0700 | [diff] [blame] | 31 | #include <linux/hyperv.h> |
K. Y. Srinivasan | 3f335ea | 2011-05-12 19:34:15 -0700 | [diff] [blame] | 32 | |
K. Y. Srinivasan | 0f2a661 | 2011-05-12 19:34:28 -0700 | [diff] [blame] | 33 | #include "hyperv_vmbus.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 34 | |
Greg Kroah-Hartman | 1d7e907 | 2009-08-28 16:26:11 -0700 | [diff] [blame] | 35 | struct vmbus_channel_message_table_entry { |
K. Y. Srinivasan | cf9dcba | 2011-05-10 07:55:37 -0700 | [diff] [blame] | 36 | enum vmbus_channel_message_type message_type; |
K. Y. Srinivasan | fa90f1d | 2011-05-10 07:55:36 -0700 | [diff] [blame] | 37 | void (*message_handler)(struct vmbus_channel_message_header *msg); |
Greg Kroah-Hartman | 1d7e907 | 2009-08-28 16:26:11 -0700 | [diff] [blame] | 38 | }; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 39 | |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 40 | |
| 41 | /** |
Greg Kroah-Hartman | da0e963 | 2011-10-11 08:42:28 -0600 | [diff] [blame] | 42 | * vmbus_prep_negotiate_resp() - Create default response for Hyper-V Negotiate message |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 43 | * @icmsghdrp: Pointer to msg header structure |
| 44 | * @icmsg_negotiate: Pointer to negotiate message structure |
| 45 | * @buf: Raw buffer channel data |
| 46 | * |
| 47 | * @icmsghdrp is of type &struct icmsg_hdr. |
| 48 | * @negop is of type &struct icmsg_negotiate. |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 49 | * Set up and fill in default negotiate response message. |
| 50 | * |
| 51 | * The max_fw_version specifies the maximum framework version that |
| 52 | * we can support and max _srv_version specifies the maximum service |
| 53 | * version we can support. A special value MAX_SRV_VER can be |
| 54 | * specified to indicate that we can handle the maximum version |
| 55 | * exposed by the host. |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 56 | * |
| 57 | * Mainly used by Hyper-V drivers. |
| 58 | */ |
Greg Kroah-Hartman | da0e963 | 2011-10-11 08:42:28 -0600 | [diff] [blame] | 59 | void vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 60 | struct icmsg_negotiate *negop, u8 *buf, |
| 61 | int max_fw_version, int max_srv_version) |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 62 | { |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 63 | int icframe_vercnt; |
| 64 | int icmsg_vercnt; |
| 65 | int i; |
| 66 | |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 67 | icmsghdrp->icmsgsize = 0x10; |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 68 | |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 69 | negop = (struct icmsg_negotiate *)&buf[ |
| 70 | sizeof(struct vmbuspipe_hdr) + |
| 71 | sizeof(struct icmsg_hdr)]; |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 72 | |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 73 | icframe_vercnt = negop->icframe_vercnt; |
| 74 | icmsg_vercnt = negop->icmsg_vercnt; |
| 75 | |
| 76 | /* |
| 77 | * Select the framework version number we will |
| 78 | * support. |
| 79 | */ |
| 80 | |
| 81 | for (i = 0; i < negop->icframe_vercnt; i++) { |
| 82 | if (negop->icversion_data[i].major <= max_fw_version) |
| 83 | icframe_vercnt = negop->icversion_data[i].major; |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 84 | } |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 85 | |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 86 | for (i = negop->icframe_vercnt; |
| 87 | (i < negop->icframe_vercnt + negop->icmsg_vercnt); i++) { |
| 88 | if (negop->icversion_data[i].major <= max_srv_version) |
| 89 | icmsg_vercnt = negop->icversion_data[i].major; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Respond with the maximum framework and service |
| 94 | * version numbers we can support. |
| 95 | */ |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 96 | negop->icframe_vercnt = 1; |
| 97 | negop->icmsg_vercnt = 1; |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 98 | negop->icversion_data[0].major = icframe_vercnt; |
| 99 | negop->icversion_data[0].minor = 0; |
| 100 | negop->icversion_data[1].major = icmsg_vercnt; |
| 101 | negop->icversion_data[1].minor = 0; |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 102 | } |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 103 | |
Greg Kroah-Hartman | da0e963 | 2011-10-11 08:42:28 -0600 | [diff] [blame] | 104 | EXPORT_SYMBOL_GPL(vmbus_prep_negotiate_resp); |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 105 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 106 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 107 | * alloc_channel - Allocate and initialize a vmbus channel object |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 108 | */ |
Greg Kroah-Hartman | 50fe56d | 2010-10-20 15:51:57 -0700 | [diff] [blame] | 109 | static struct vmbus_channel *alloc_channel(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 110 | { |
Greg Kroah-Hartman | aded716 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 111 | struct vmbus_channel *channel; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 112 | |
Greg Kroah-Hartman | aded716 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 113 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 114 | if (!channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 115 | return NULL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 116 | |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 117 | spin_lock_init(&channel->inbound_lock); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 118 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 119 | channel->controlwq = create_workqueue("hv_vmbus_ctl"); |
| 120 | if (!channel->controlwq) { |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 121 | kfree(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 122 | return NULL; |
| 123 | } |
| 124 | |
| 125 | return channel; |
| 126 | } |
| 127 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 128 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 129 | * release_hannel - Release the vmbus channel object itself |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 130 | */ |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 131 | static void release_channel(struct work_struct *work) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 132 | { |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 133 | struct vmbus_channel *channel = container_of(work, |
| 134 | struct vmbus_channel, |
| 135 | work); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 136 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 137 | destroy_workqueue(channel->controlwq); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 138 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 139 | kfree(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 140 | } |
| 141 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 142 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 143 | * free_channel - Release the resources used by the vmbus channel object |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 144 | */ |
Greg Kroah-Hartman | 9f3e28e | 2011-10-11 09:40:01 -0600 | [diff] [blame] | 145 | static void free_channel(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 146 | { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 147 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 148 | /* |
| 149 | * We have to release the channel's workqueue/thread in the vmbus's |
| 150 | * workqueue/thread context |
| 151 | * ie we can't destroy ourselves. |
| 152 | */ |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 153 | INIT_WORK(&channel->work, release_channel); |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 154 | queue_work(vmbus_connection.work_queue, &channel->work); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 155 | } |
| 156 | |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 157 | |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 158 | |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 159 | /* |
| 160 | * vmbus_process_rescind_offer - |
| 161 | * Rescind the offer by initiating a device removal |
| 162 | */ |
| 163 | static void vmbus_process_rescind_offer(struct work_struct *work) |
| 164 | { |
| 165 | struct vmbus_channel *channel = container_of(work, |
| 166 | struct vmbus_channel, |
| 167 | work); |
K. Y. Srinivasan | c870597 | 2013-03-15 12:25:44 -0700 | [diff] [blame] | 168 | unsigned long flags; |
| 169 | struct vmbus_channel_relid_released msg; |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 170 | |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 171 | vmbus_device_unregister(channel->device_obj); |
K. Y. Srinivasan | c870597 | 2013-03-15 12:25:44 -0700 | [diff] [blame] | 172 | memset(&msg, 0, sizeof(struct vmbus_channel_relid_released)); |
| 173 | msg.child_relid = channel->offermsg.child_relid; |
| 174 | msg.header.msgtype = CHANNELMSG_RELID_RELEASED; |
| 175 | vmbus_post_msg(&msg, sizeof(struct vmbus_channel_relid_released)); |
| 176 | |
| 177 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
| 178 | list_del(&channel->listentry); |
| 179 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
| 180 | free_channel(channel); |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 181 | } |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 182 | |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 183 | void vmbus_free_channels(void) |
| 184 | { |
| 185 | struct vmbus_channel *channel; |
| 186 | |
| 187 | list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |
| 188 | vmbus_device_unregister(channel->device_obj); |
| 189 | kfree(channel->device_obj); |
| 190 | free_channel(channel); |
| 191 | } |
| 192 | } |
| 193 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 194 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 195 | * vmbus_process_offer - Process the offer by creating a channel/device |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 196 | * associated with this offer |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 197 | */ |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 198 | static void vmbus_process_offer(struct work_struct *work) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 199 | { |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 200 | struct vmbus_channel *newchannel = container_of(work, |
| 201 | struct vmbus_channel, |
| 202 | work); |
Greg Kroah-Hartman | aded716 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 203 | struct vmbus_channel *channel; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 204 | bool fnew = true; |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 205 | int ret; |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 206 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 207 | |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 208 | /* The next possible work is rescind handling */ |
| 209 | INIT_WORK(&newchannel->work, vmbus_process_rescind_offer); |
| 210 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 211 | /* Make sure this is a new offer */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 212 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 213 | |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 214 | list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 215 | if (!uuid_le_cmp(channel->offermsg.offer.if_type, |
| 216 | newchannel->offermsg.offer.if_type) && |
| 217 | !uuid_le_cmp(channel->offermsg.offer.if_instance, |
| 218 | newchannel->offermsg.offer.if_instance)) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 219 | fnew = false; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 220 | break; |
| 221 | } |
| 222 | } |
| 223 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 224 | if (fnew) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 225 | list_add_tail(&newchannel->listentry, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 226 | &vmbus_connection.chn_list); |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 227 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 228 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 229 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 230 | if (!fnew) { |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 231 | free_channel(newchannel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 232 | return; |
| 233 | } |
| 234 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 235 | /* |
| 236 | * Start the process of binding this offer to the driver |
| 237 | * We need to set the DeviceObject field before calling |
Haiyang Zhang | 646f1ea | 2011-01-26 12:12:10 -0800 | [diff] [blame] | 238 | * vmbus_child_dev_add() |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 239 | */ |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 240 | newchannel->device_obj = vmbus_device_create( |
Haiyang Zhang | 767dff6 | 2011-01-26 12:12:12 -0800 | [diff] [blame] | 241 | &newchannel->offermsg.offer.if_type, |
| 242 | &newchannel->offermsg.offer.if_instance, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 243 | newchannel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 244 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 245 | /* |
| 246 | * Add the new device to the bus. This will kick off device-driver |
| 247 | * binding which eventually invokes the device driver's AddDevice() |
| 248 | * method. |
| 249 | */ |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 250 | ret = vmbus_device_register(newchannel->device_obj); |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 251 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 252 | pr_err("unable to add child device object (relid %d)\n", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 253 | newchannel->offermsg.child_relid); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 254 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 255 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 256 | list_del(&newchannel->listentry); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 257 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
K. Y. Srinivasan | 8b8ee67 | 2011-12-12 09:29:16 -0800 | [diff] [blame] | 258 | kfree(newchannel->device_obj); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 259 | |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 260 | free_channel(newchannel); |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 261 | } else { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 262 | /* |
| 263 | * This state is used to indicate a successful open |
| 264 | * so that when we do close the channel normally, we |
| 265 | * can cleanup properly |
| 266 | */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 267 | newchannel->state = CHANNEL_OPEN_STATE; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 268 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 269 | } |
| 270 | |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 271 | enum { |
| 272 | IDE = 0, |
| 273 | SCSI, |
| 274 | NIC, |
| 275 | MAX_PERF_CHN, |
| 276 | }; |
| 277 | |
| 278 | /* |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 279 | * This is an array of device_ids (device types) that are performance critical. |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 280 | * We attempt to distribute the interrupt load for these devices across |
| 281 | * all available CPUs. |
| 282 | */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 283 | static const struct hv_vmbus_device_id hp_devs[] = { |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 284 | /* IDE */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 285 | { HV_IDE_GUID, }, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 286 | /* Storage - SCSI */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 287 | { HV_SCSI_GUID, }, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 288 | /* Network */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 289 | { HV_NIC_GUID, }, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 290 | }; |
| 291 | |
| 292 | |
| 293 | /* |
| 294 | * We use this state to statically distribute the channel interrupt load. |
| 295 | */ |
| 296 | static u32 next_vp; |
| 297 | |
| 298 | /* |
| 299 | * Starting with Win8, we can statically distribute the incoming |
| 300 | * channel interrupt load by binding a channel to VCPU. We |
| 301 | * implement here a simple round robin scheme for distributing |
| 302 | * the interrupt load. |
| 303 | * We will bind channels that are not performance critical to cpu 0 and |
| 304 | * performance critical channels (IDE, SCSI and Network) will be uniformly |
| 305 | * distributed across all available CPUs. |
| 306 | */ |
| 307 | static u32 get_vp_index(uuid_le *type_guid) |
| 308 | { |
| 309 | u32 cur_cpu; |
| 310 | int i; |
| 311 | bool perf_chn = false; |
| 312 | u32 max_cpus = num_online_cpus(); |
| 313 | |
| 314 | for (i = IDE; i < MAX_PERF_CHN; i++) { |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 315 | if (!memcmp(type_guid->b, hp_devs[i].guid, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 316 | sizeof(uuid_le))) { |
| 317 | perf_chn = true; |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | if ((vmbus_proto_version == VERSION_WS2008) || |
| 322 | (vmbus_proto_version == VERSION_WIN7) || (!perf_chn)) { |
| 323 | /* |
| 324 | * Prior to win8, all channel interrupts are |
| 325 | * delivered on cpu 0. |
| 326 | * Also if the channel is not a performance critical |
| 327 | * channel, bind it to cpu 0. |
| 328 | */ |
| 329 | return 0; |
| 330 | } |
| 331 | cur_cpu = (++next_vp % max_cpus); |
K. Y. Srinivasan | d2242a3 | 2013-05-17 09:30:35 -0700 | [diff] [blame] | 332 | return hv_context.vp_index[cur_cpu]; |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 333 | } |
| 334 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 335 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 336 | * vmbus_onoffer - Handler for channel offers from vmbus in parent partition. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 337 | * |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 338 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 339 | static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 340 | { |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 341 | struct vmbus_channel_offer_channel *offer; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 342 | struct vmbus_channel *newchannel; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 343 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 344 | offer = (struct vmbus_channel_offer_channel *)hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 345 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 346 | /* Allocate the channel object and save this offer. */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 347 | newchannel = alloc_channel(); |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 348 | if (!newchannel) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 349 | pr_err("Unable to allocate channel object\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 350 | return; |
| 351 | } |
| 352 | |
K. Y. Srinivasan | 132368b | 2012-12-01 06:46:33 -0800 | [diff] [blame] | 353 | /* |
| 354 | * By default we setup state to enable batched |
| 355 | * reading. A specific service can choose to |
| 356 | * disable this prior to opening the channel. |
| 357 | */ |
| 358 | newchannel->batched_reading = true; |
| 359 | |
K. Y. Srinivasan | b3bf60c | 2012-12-01 06:46:45 -0800 | [diff] [blame] | 360 | /* |
| 361 | * Setup state for signalling the host. |
| 362 | */ |
| 363 | newchannel->sig_event = (struct hv_input_signal_event *) |
| 364 | (ALIGN((unsigned long) |
| 365 | &newchannel->sig_buf, |
| 366 | HV_HYPERCALL_PARAM_ALIGN)); |
| 367 | |
| 368 | newchannel->sig_event->connectionid.asu32 = 0; |
| 369 | newchannel->sig_event->connectionid.u.id = VMBUS_EVENT_CONNECTION_ID; |
| 370 | newchannel->sig_event->flag_number = 0; |
| 371 | newchannel->sig_event->rsvdz = 0; |
| 372 | |
| 373 | if (vmbus_proto_version != VERSION_WS2008) { |
| 374 | newchannel->is_dedicated_interrupt = |
| 375 | (offer->is_dedicated_interrupt != 0); |
| 376 | newchannel->sig_event->connectionid.u.id = |
| 377 | offer->connection_id; |
| 378 | } |
| 379 | |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 380 | newchannel->target_vp = get_vp_index(&offer->offer.if_type); |
K. Y. Srinivasan | abbf3b2 | 2012-12-01 06:46:48 -0800 | [diff] [blame] | 381 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 382 | memcpy(&newchannel->offermsg, offer, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 383 | sizeof(struct vmbus_channel_offer_channel)); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 384 | newchannel->monitor_grp = (u8)offer->monitorid / 32; |
| 385 | newchannel->monitor_bit = (u8)offer->monitorid % 32; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 386 | |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 387 | INIT_WORK(&newchannel->work, vmbus_process_offer); |
| 388 | queue_work(newchannel->controlwq, &newchannel->work); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 389 | } |
| 390 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 391 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 392 | * vmbus_onoffer_rescind - Rescind offer handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 393 | * |
| 394 | * We queue a work item to process this offer synchronously |
| 395 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 396 | static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 397 | { |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 398 | struct vmbus_channel_rescind_offer *rescind; |
Greg Kroah-Hartman | aded716 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 399 | struct vmbus_channel *channel; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 400 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 401 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 402 | channel = relid2channel(rescind->child_relid); |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 403 | |
| 404 | if (channel == NULL) |
| 405 | /* Just return here, no channel found */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 406 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 407 | |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 408 | /* work is initialized for vmbus_process_rescind_offer() from |
| 409 | * vmbus_process_offer() where the channel got created */ |
| 410 | queue_work(channel->controlwq, &channel->work); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 411 | } |
| 412 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 413 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 414 | * vmbus_onoffers_delivered - |
| 415 | * This is invoked when all offers have been delivered. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 416 | * |
| 417 | * Nothing to do here. |
| 418 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 419 | static void vmbus_onoffers_delivered( |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 420 | struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 421 | { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 422 | } |
| 423 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 424 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 425 | * vmbus_onopen_result - Open result handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 426 | * |
| 427 | * This is invoked when we received a response to our channel open request. |
| 428 | * Find the matching request, copy the response and signal the requesting |
| 429 | * thread. |
| 430 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 431 | static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 432 | { |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 433 | struct vmbus_channel_open_result *result; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 434 | struct vmbus_channel_msginfo *msginfo; |
| 435 | struct vmbus_channel_message_header *requestheader; |
| 436 | struct vmbus_channel_open_channel *openmsg; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 437 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 438 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 439 | result = (struct vmbus_channel_open_result *)hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 440 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 441 | /* |
| 442 | * Find the open msg, copy the result and signal/unblock the wait event |
| 443 | */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 444 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 445 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 446 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 447 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 448 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 449 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 450 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 451 | if (requestheader->msgtype == CHANNELMSG_OPENCHANNEL) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 452 | openmsg = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 453 | (struct vmbus_channel_open_channel *)msginfo->msg; |
| 454 | if (openmsg->child_relid == result->child_relid && |
| 455 | openmsg->openid == result->openid) { |
| 456 | memcpy(&msginfo->response.open_result, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 457 | result, |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 458 | sizeof( |
| 459 | struct vmbus_channel_open_result)); |
| 460 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 461 | break; |
| 462 | } |
| 463 | } |
| 464 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 465 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 466 | } |
| 467 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 468 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 469 | * vmbus_ongpadl_created - GPADL created handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 470 | * |
| 471 | * This is invoked when we received a response to our gpadl create request. |
| 472 | * Find the matching request, copy the response and signal the requesting |
| 473 | * thread. |
| 474 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 475 | static void vmbus_ongpadl_created(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 476 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 477 | struct vmbus_channel_gpadl_created *gpadlcreated; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 478 | struct vmbus_channel_msginfo *msginfo; |
| 479 | struct vmbus_channel_message_header *requestheader; |
| 480 | struct vmbus_channel_gpadl_header *gpadlheader; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 481 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 482 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 483 | gpadlcreated = (struct vmbus_channel_gpadl_created *)hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 484 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 485 | /* |
| 486 | * Find the establish msg, copy the result and signal/unblock the wait |
| 487 | * event |
| 488 | */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 489 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 490 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 491 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 492 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 493 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 494 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 495 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 496 | if (requestheader->msgtype == CHANNELMSG_GPADL_HEADER) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 497 | gpadlheader = |
| 498 | (struct vmbus_channel_gpadl_header *)requestheader; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 499 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 500 | if ((gpadlcreated->child_relid == |
| 501 | gpadlheader->child_relid) && |
| 502 | (gpadlcreated->gpadl == gpadlheader->gpadl)) { |
| 503 | memcpy(&msginfo->response.gpadl_created, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 504 | gpadlcreated, |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 505 | sizeof( |
| 506 | struct vmbus_channel_gpadl_created)); |
| 507 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 508 | break; |
| 509 | } |
| 510 | } |
| 511 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 512 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 513 | } |
| 514 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 515 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 516 | * vmbus_ongpadl_torndown - GPADL torndown handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 517 | * |
| 518 | * This is invoked when we received a response to our gpadl teardown request. |
| 519 | * Find the matching request, copy the response and signal the requesting |
| 520 | * thread. |
| 521 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 522 | static void vmbus_ongpadl_torndown( |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 523 | struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 524 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 525 | struct vmbus_channel_gpadl_torndown *gpadl_torndown; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 526 | struct vmbus_channel_msginfo *msginfo; |
| 527 | struct vmbus_channel_message_header *requestheader; |
| 528 | struct vmbus_channel_gpadl_teardown *gpadl_teardown; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 529 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 530 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 531 | gpadl_torndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 532 | |
| 533 | /* |
| 534 | * Find the open msg, copy the result and signal/unblock the wait event |
| 535 | */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 536 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 537 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 538 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 539 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 540 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 541 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 542 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 543 | if (requestheader->msgtype == CHANNELMSG_GPADL_TEARDOWN) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 544 | gpadl_teardown = |
| 545 | (struct vmbus_channel_gpadl_teardown *)requestheader; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 546 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 547 | if (gpadl_torndown->gpadl == gpadl_teardown->gpadl) { |
| 548 | memcpy(&msginfo->response.gpadl_torndown, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 549 | gpadl_torndown, |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 550 | sizeof( |
| 551 | struct vmbus_channel_gpadl_torndown)); |
| 552 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 553 | break; |
| 554 | } |
| 555 | } |
| 556 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 557 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 558 | } |
| 559 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 560 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 561 | * vmbus_onversion_response - Version response handler |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 562 | * |
| 563 | * This is invoked when we received a response to our initiate contact request. |
| 564 | * Find the matching request, copy the response and signal the requesting |
| 565 | * thread. |
| 566 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 567 | static void vmbus_onversion_response( |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 568 | struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 569 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 570 | struct vmbus_channel_msginfo *msginfo; |
| 571 | struct vmbus_channel_message_header *requestheader; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 572 | struct vmbus_channel_version_response *version_response; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 573 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 574 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 575 | version_response = (struct vmbus_channel_version_response *)hdr; |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 576 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 577 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 578 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 579 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 580 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 581 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 582 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 583 | if (requestheader->msgtype == |
| 584 | CHANNELMSG_INITIATE_CONTACT) { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 585 | memcpy(&msginfo->response.version_response, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 586 | version_response, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 587 | sizeof(struct vmbus_channel_version_response)); |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 588 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 589 | } |
| 590 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 591 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Greg Kroah-Hartman | c8212f0 | 2009-08-31 21:51:50 -0700 | [diff] [blame] | 594 | /* Channel message dispatch table */ |
| 595 | static struct vmbus_channel_message_table_entry |
K. Y. Srinivasan | b7c6b02 | 2011-05-10 07:55:38 -0700 | [diff] [blame] | 596 | channel_message_table[CHANNELMSG_COUNT] = { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 597 | {CHANNELMSG_INVALID, NULL}, |
| 598 | {CHANNELMSG_OFFERCHANNEL, vmbus_onoffer}, |
| 599 | {CHANNELMSG_RESCIND_CHANNELOFFER, vmbus_onoffer_rescind}, |
| 600 | {CHANNELMSG_REQUESTOFFERS, NULL}, |
| 601 | {CHANNELMSG_ALLOFFERS_DELIVERED, vmbus_onoffers_delivered}, |
| 602 | {CHANNELMSG_OPENCHANNEL, NULL}, |
| 603 | {CHANNELMSG_OPENCHANNEL_RESULT, vmbus_onopen_result}, |
| 604 | {CHANNELMSG_CLOSECHANNEL, NULL}, |
| 605 | {CHANNELMSG_GPADL_HEADER, NULL}, |
| 606 | {CHANNELMSG_GPADL_BODY, NULL}, |
| 607 | {CHANNELMSG_GPADL_CREATED, vmbus_ongpadl_created}, |
| 608 | {CHANNELMSG_GPADL_TEARDOWN, NULL}, |
| 609 | {CHANNELMSG_GPADL_TORNDOWN, vmbus_ongpadl_torndown}, |
| 610 | {CHANNELMSG_RELID_RELEASED, NULL}, |
| 611 | {CHANNELMSG_INITIATE_CONTACT, NULL}, |
| 612 | {CHANNELMSG_VERSION_RESPONSE, vmbus_onversion_response}, |
| 613 | {CHANNELMSG_UNLOAD, NULL}, |
Greg Kroah-Hartman | c8212f0 | 2009-08-31 21:51:50 -0700 | [diff] [blame] | 614 | }; |
| 615 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 616 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 617 | * vmbus_onmessage - Handler for channel protocol messages. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 618 | * |
| 619 | * This is invoked in the vmbus worker thread context. |
| 620 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 621 | void vmbus_onmessage(void *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 622 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 623 | struct hv_message *msg = context; |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 624 | struct vmbus_channel_message_header *hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 625 | int size; |
| 626 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 627 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
| 628 | size = msg->header.payload_size; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 629 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 630 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 631 | pr_err("Received invalid channel message type %d size %d\n", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 632 | hdr->msgtype, size); |
Greg Kroah-Hartman | 04f50c4 | 2009-07-16 12:35:37 -0700 | [diff] [blame] | 633 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 634 | (unsigned char *)msg->u.payload, size); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 635 | return; |
| 636 | } |
| 637 | |
K. Y. Srinivasan | b7c6b02 | 2011-05-10 07:55:38 -0700 | [diff] [blame] | 638 | if (channel_message_table[hdr->msgtype].message_handler) |
| 639 | channel_message_table[hdr->msgtype].message_handler(hdr); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 640 | else |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 641 | pr_err("Unhandled channel message type %d\n", hdr->msgtype); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 642 | } |
| 643 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 644 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 645 | * vmbus_request_offers - Send a request to get all our pending offers. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 646 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 647 | int vmbus_request_offers(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 648 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 649 | struct vmbus_channel_message_header *msg; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 650 | struct vmbus_channel_msginfo *msginfo; |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 651 | int ret, t; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 652 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 653 | msginfo = kmalloc(sizeof(*msginfo) + |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 654 | sizeof(struct vmbus_channel_message_header), |
| 655 | GFP_KERNEL); |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 656 | if (!msginfo) |
Bill Pemberton | 75910f2 | 2010-05-05 15:27:31 -0400 | [diff] [blame] | 657 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 658 | |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 659 | init_completion(&msginfo->waitevent); |
Bill Pemberton | 75910f2 | 2010-05-05 15:27:31 -0400 | [diff] [blame] | 660 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 661 | msg = (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 662 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 663 | msg->msgtype = CHANNELMSG_REQUESTOFFERS; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 664 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 665 | |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 666 | ret = vmbus_post_msg(msg, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 667 | sizeof(struct vmbus_channel_message_header)); |
| 668 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 669 | pr_err("Unable to request offers - %d\n", ret); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 670 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 671 | goto cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 672 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 673 | |
K. Y. Srinivasan | 2dfde96 | 2011-06-16 13:16:34 -0700 | [diff] [blame] | 674 | t = wait_for_completion_timeout(&msginfo->waitevent, 5*HZ); |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 675 | if (t == 0) { |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 676 | ret = -ETIMEDOUT; |
| 677 | goto cleanup; |
| 678 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 679 | |
| 680 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 681 | |
| 682 | cleanup: |
Ilia Mirkin | dd9b15d | 2011-03-13 00:29:00 -0500 | [diff] [blame] | 683 | kfree(msginfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 684 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 685 | return ret; |
| 686 | } |
| 687 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 688 | /* eof */ |