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 | * |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 51 | * The fw_version specifies the framework version that |
| 52 | * we can support and srv_version specifies the service |
| 53 | * version we can support. |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 54 | * |
| 55 | * Mainly used by Hyper-V drivers. |
| 56 | */ |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 57 | bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 58 | struct icmsg_negotiate *negop, u8 *buf, |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 59 | int fw_version, int srv_version) |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 60 | { |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 61 | int icframe_major, icframe_minor; |
| 62 | int icmsg_major, icmsg_minor; |
| 63 | int fw_major, fw_minor; |
| 64 | int srv_major, srv_minor; |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 65 | int i; |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 66 | bool found_match = false; |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 67 | |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 68 | icmsghdrp->icmsgsize = 0x10; |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 69 | fw_major = (fw_version >> 16); |
| 70 | fw_minor = (fw_version & 0xFFFF); |
| 71 | |
| 72 | srv_major = (srv_version >> 16); |
| 73 | srv_minor = (srv_version & 0xFFFF); |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 74 | |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 75 | negop = (struct icmsg_negotiate *)&buf[ |
| 76 | sizeof(struct vmbuspipe_hdr) + |
| 77 | sizeof(struct icmsg_hdr)]; |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 78 | |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 79 | icframe_major = negop->icframe_vercnt; |
| 80 | icframe_minor = 0; |
| 81 | |
| 82 | icmsg_major = negop->icmsg_vercnt; |
| 83 | icmsg_minor = 0; |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 84 | |
| 85 | /* |
| 86 | * Select the framework version number we will |
| 87 | * support. |
| 88 | */ |
| 89 | |
| 90 | for (i = 0; i < negop->icframe_vercnt; i++) { |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 91 | if ((negop->icversion_data[i].major == fw_major) && |
| 92 | (negop->icversion_data[i].minor == fw_minor)) { |
| 93 | icframe_major = negop->icversion_data[i].major; |
| 94 | icframe_minor = negop->icversion_data[i].minor; |
| 95 | found_match = true; |
| 96 | } |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 97 | } |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 98 | |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 99 | if (!found_match) |
| 100 | goto fw_error; |
| 101 | |
| 102 | found_match = false; |
| 103 | |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 104 | for (i = negop->icframe_vercnt; |
| 105 | (i < negop->icframe_vercnt + negop->icmsg_vercnt); i++) { |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 106 | if ((negop->icversion_data[i].major == srv_major) && |
| 107 | (negop->icversion_data[i].minor == srv_minor)) { |
| 108 | icmsg_major = negop->icversion_data[i].major; |
| 109 | icmsg_minor = negop->icversion_data[i].minor; |
| 110 | found_match = true; |
| 111 | } |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | /* |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 115 | * Respond with the framework and service |
K. Y. Srinivasan | c836d0a | 2012-05-12 13:44:58 -0700 | [diff] [blame] | 116 | * version numbers we can support. |
| 117 | */ |
K. Y. Srinivasan | 6741335 | 2013-07-02 10:31:30 -0700 | [diff] [blame] | 118 | |
| 119 | fw_error: |
| 120 | if (!found_match) { |
| 121 | negop->icframe_vercnt = 0; |
| 122 | negop->icmsg_vercnt = 0; |
| 123 | } else { |
| 124 | negop->icframe_vercnt = 1; |
| 125 | negop->icmsg_vercnt = 1; |
| 126 | } |
| 127 | |
| 128 | negop->icversion_data[0].major = icframe_major; |
| 129 | negop->icversion_data[0].minor = icframe_minor; |
| 130 | negop->icversion_data[1].major = icmsg_major; |
| 131 | negop->icversion_data[1].minor = icmsg_minor; |
| 132 | return found_match; |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 133 | } |
K. Y. Srinivasan | a360530 | 2012-05-12 13:44:57 -0700 | [diff] [blame] | 134 | |
Greg Kroah-Hartman | da0e963 | 2011-10-11 08:42:28 -0600 | [diff] [blame] | 135 | EXPORT_SYMBOL_GPL(vmbus_prep_negotiate_resp); |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 136 | |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 137 | static void vmbus_process_device_unregister(struct work_struct *work) |
| 138 | { |
| 139 | struct device *dev; |
| 140 | struct vmbus_channel *channel = container_of(work, |
| 141 | struct vmbus_channel, |
| 142 | work); |
| 143 | |
| 144 | dev = get_device(&channel->device_obj->device); |
| 145 | if (dev) { |
| 146 | vmbus_device_unregister(channel->device_obj); |
| 147 | put_device(dev); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | static void vmbus_sc_creation_cb(struct work_struct *work) |
| 152 | { |
| 153 | struct vmbus_channel *newchannel = container_of(work, |
| 154 | struct vmbus_channel, |
| 155 | work); |
| 156 | struct vmbus_channel *primary_channel = newchannel->primary_channel; |
| 157 | |
| 158 | /* |
| 159 | * On entry sc_creation_callback has been already verified to |
| 160 | * be non-NULL. |
| 161 | */ |
| 162 | primary_channel->sc_creation_callback(newchannel); |
| 163 | } |
| 164 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 165 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 166 | * alloc_channel - Allocate and initialize a vmbus channel object |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 167 | */ |
Greg Kroah-Hartman | 50fe56d | 2010-10-20 15:51:57 -0700 | [diff] [blame] | 168 | static struct vmbus_channel *alloc_channel(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 169 | { |
Vitaly Kuznetsov | bc63b6f | 2015-02-27 11:25:52 -0800 | [diff] [blame] | 170 | static atomic_t chan_num = ATOMIC_INIT(0); |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 171 | struct vmbus_channel *channel; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 172 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 173 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 174 | if (!channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 175 | return NULL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 176 | |
Vitaly Kuznetsov | bc63b6f | 2015-02-27 11:25:52 -0800 | [diff] [blame] | 177 | channel->id = atomic_inc_return(&chan_num); |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 178 | spin_lock_init(&channel->inbound_lock); |
Vitaly Kuznetsov | 67fae05 | 2015-01-20 16:45:05 +0100 | [diff] [blame] | 179 | spin_lock_init(&channel->lock); |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 180 | |
| 181 | INIT_LIST_HEAD(&channel->sc_list); |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 182 | INIT_LIST_HEAD(&channel->percpu_list); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 183 | |
Vitaly Kuznetsov | bc63b6f | 2015-02-27 11:25:52 -0800 | [diff] [blame] | 184 | channel->controlwq = alloc_workqueue("hv_vmbus_ctl/%d", WQ_MEM_RECLAIM, |
| 185 | 1, channel->id); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 186 | if (!channel->controlwq) { |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 187 | kfree(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 188 | return NULL; |
| 189 | } |
| 190 | |
| 191 | return channel; |
| 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 | * release_hannel - Release the vmbus channel object itself |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 196 | */ |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 197 | static void release_channel(struct work_struct *work) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 198 | { |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 199 | struct vmbus_channel *channel = container_of(work, |
| 200 | struct vmbus_channel, |
| 201 | work); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 202 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 203 | destroy_workqueue(channel->controlwq); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 204 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 205 | kfree(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 208 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 209 | * free_channel - Release the resources used by the vmbus channel object |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 210 | */ |
Greg Kroah-Hartman | 9f3e28e | 2011-10-11 09:40:01 -0600 | [diff] [blame] | 211 | static void free_channel(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 212 | { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 213 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 214 | /* |
| 215 | * We have to release the channel's workqueue/thread in the vmbus's |
| 216 | * workqueue/thread context |
| 217 | * ie we can't destroy ourselves. |
| 218 | */ |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 219 | INIT_WORK(&channel->work, release_channel); |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 220 | queue_work(vmbus_connection.work_queue, &channel->work); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 221 | } |
| 222 | |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 223 | static void percpu_channel_enq(void *arg) |
| 224 | { |
| 225 | struct vmbus_channel *channel = arg; |
| 226 | int cpu = smp_processor_id(); |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 227 | |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 228 | list_add_tail(&channel->percpu_list, &hv_context.percpu_list[cpu]); |
| 229 | } |
| 230 | |
| 231 | static void percpu_channel_deq(void *arg) |
| 232 | { |
| 233 | struct vmbus_channel *channel = arg; |
| 234 | |
| 235 | list_del(&channel->percpu_list); |
| 236 | } |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 237 | |
K. Y. Srinivasan | ed6cfcc | 2015-02-28 11:18:17 -0800 | [diff] [blame] | 238 | |
| 239 | void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid) |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 240 | { |
K. Y. Srinivasan | ed6cfcc | 2015-02-28 11:18:17 -0800 | [diff] [blame] | 241 | struct vmbus_channel_relid_released msg; |
K. Y. Srinivasan | c870597 | 2013-03-15 12:25:44 -0700 | [diff] [blame] | 242 | unsigned long flags; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 243 | struct vmbus_channel *primary_channel; |
Vitaly Kuznetsov | 04a258c | 2014-11-04 13:40:11 +0100 | [diff] [blame] | 244 | |
K. Y. Srinivasan | c870597 | 2013-03-15 12:25:44 -0700 | [diff] [blame] | 245 | memset(&msg, 0, sizeof(struct vmbus_channel_relid_released)); |
K. Y. Srinivasan | ed6cfcc | 2015-02-28 11:18:17 -0800 | [diff] [blame] | 246 | msg.child_relid = relid; |
K. Y. Srinivasan | c870597 | 2013-03-15 12:25:44 -0700 | [diff] [blame] | 247 | msg.header.msgtype = CHANNELMSG_RELID_RELEASED; |
| 248 | vmbus_post_msg(&msg, sizeof(struct vmbus_channel_relid_released)); |
| 249 | |
K. Y. Srinivasan | ed6cfcc | 2015-02-28 11:18:17 -0800 | [diff] [blame] | 250 | if (channel == NULL) |
| 251 | return; |
| 252 | |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 253 | if (channel->target_cpu != get_cpu()) { |
| 254 | put_cpu(); |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 255 | smp_call_function_single(channel->target_cpu, |
| 256 | percpu_channel_deq, channel, true); |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 257 | } else { |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 258 | percpu_channel_deq(channel); |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 259 | put_cpu(); |
| 260 | } |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 261 | |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 262 | if (channel->primary_channel == NULL) { |
| 263 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
| 264 | list_del(&channel->listentry); |
| 265 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
| 266 | } else { |
| 267 | primary_channel = channel->primary_channel; |
Vitaly Kuznetsov | 67fae05 | 2015-01-20 16:45:05 +0100 | [diff] [blame] | 268 | spin_lock_irqsave(&primary_channel->lock, flags); |
K. Y. Srinivasan | 565ce64 | 2013-10-16 19:27:19 -0700 | [diff] [blame] | 269 | list_del(&channel->sc_list); |
Vitaly Kuznetsov | 67fae05 | 2015-01-20 16:45:05 +0100 | [diff] [blame] | 270 | spin_unlock_irqrestore(&primary_channel->lock, flags); |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 271 | } |
K. Y. Srinivasan | c870597 | 2013-03-15 12:25:44 -0700 | [diff] [blame] | 272 | free_channel(channel); |
Timo Teräs | 4b2f9ab | 2010-12-15 20:48:09 +0200 | [diff] [blame] | 273 | } |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 274 | |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 275 | void vmbus_free_channels(void) |
| 276 | { |
| 277 | struct vmbus_channel *channel; |
| 278 | |
| 279 | list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |
| 280 | vmbus_device_unregister(channel->device_obj); |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 281 | free_channel(channel); |
| 282 | } |
| 283 | } |
| 284 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 285 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 286 | * vmbus_process_offer - Process the offer by creating a channel/device |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 287 | * associated with this offer |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 288 | */ |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 289 | static void vmbus_process_offer(struct vmbus_channel *newchannel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 290 | { |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 291 | struct vmbus_channel *channel; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 292 | bool fnew = true; |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 293 | bool enq = false; |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 294 | int ret; |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 295 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 296 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 297 | /* Make sure this is a new offer */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 298 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 299 | |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 300 | list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 301 | if (!uuid_le_cmp(channel->offermsg.offer.if_type, |
| 302 | newchannel->offermsg.offer.if_type) && |
| 303 | !uuid_le_cmp(channel->offermsg.offer.if_instance, |
| 304 | newchannel->offermsg.offer.if_instance)) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 305 | fnew = false; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 306 | break; |
| 307 | } |
| 308 | } |
| 309 | |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 310 | if (fnew) { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 311 | list_add_tail(&newchannel->listentry, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 312 | &vmbus_connection.chn_list); |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 313 | enq = true; |
| 314 | } |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 315 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 316 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 317 | |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 318 | if (enq) { |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 319 | if (newchannel->target_cpu != get_cpu()) { |
| 320 | put_cpu(); |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 321 | smp_call_function_single(newchannel->target_cpu, |
| 322 | percpu_channel_enq, |
| 323 | newchannel, true); |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 324 | } else { |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 325 | percpu_channel_enq(newchannel); |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 326 | put_cpu(); |
| 327 | } |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 328 | } |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 329 | if (!fnew) { |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 330 | /* |
| 331 | * Check to see if this is a sub-channel. |
| 332 | */ |
| 333 | if (newchannel->offermsg.offer.sub_channel_index != 0) { |
| 334 | /* |
| 335 | * Process the sub-channel. |
| 336 | */ |
| 337 | newchannel->primary_channel = channel; |
Vitaly Kuznetsov | 67fae05 | 2015-01-20 16:45:05 +0100 | [diff] [blame] | 338 | spin_lock_irqsave(&channel->lock, flags); |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 339 | list_add_tail(&newchannel->sc_list, &channel->sc_list); |
Vitaly Kuznetsov | 67fae05 | 2015-01-20 16:45:05 +0100 | [diff] [blame] | 340 | spin_unlock_irqrestore(&channel->lock, flags); |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 341 | |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 342 | if (newchannel->target_cpu != get_cpu()) { |
| 343 | put_cpu(); |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 344 | smp_call_function_single(newchannel->target_cpu, |
| 345 | percpu_channel_enq, |
| 346 | newchannel, true); |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 347 | } else { |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 348 | percpu_channel_enq(newchannel); |
K. Y. Srinivasan | 2115b56 | 2014-08-28 18:29:53 -0700 | [diff] [blame] | 349 | put_cpu(); |
| 350 | } |
K. Y. Srinivasan | 3a28fa3 | 2014-04-08 18:45:54 -0700 | [diff] [blame] | 351 | |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 352 | newchannel->state = CHANNEL_OPEN_STATE; |
K. Y. Srinivasan | a13e8bb | 2015-02-28 11:39:02 -0800 | [diff] [blame^] | 353 | channel->num_sc++; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 354 | if (channel->sc_creation_callback != NULL) |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 355 | /* |
| 356 | * We need to invoke the sub-channel creation |
| 357 | * callback; invoke this in a seperate work |
| 358 | * context since we are currently running on |
| 359 | * the global work context in which we handle |
| 360 | * messages from the host. |
| 361 | */ |
| 362 | INIT_WORK(&newchannel->work, |
| 363 | vmbus_sc_creation_cb); |
| 364 | queue_work(newchannel->controlwq, |
| 365 | &newchannel->work); |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 366 | |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 367 | return; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 368 | } |
| 369 | |
Vitaly Kuznetsov | 9c3a6f7 | 2015-01-20 16:45:04 +0100 | [diff] [blame] | 370 | goto err_free_chan; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 373 | /* |
K. Y. Srinivasan | 42dceeb | 2013-08-26 14:08:58 -0700 | [diff] [blame] | 374 | * This state is used to indicate a successful open |
| 375 | * so that when we do close the channel normally, we |
| 376 | * can cleanup properly |
| 377 | */ |
| 378 | newchannel->state = CHANNEL_OPEN_STATE; |
| 379 | |
| 380 | /* |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 381 | * Start the process of binding this offer to the driver |
| 382 | * We need to set the DeviceObject field before calling |
Haiyang Zhang | 646f1ea | 2011-01-26 12:12:10 -0800 | [diff] [blame] | 383 | * vmbus_child_dev_add() |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 384 | */ |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 385 | newchannel->device_obj = vmbus_device_create( |
Haiyang Zhang | 767dff6 | 2011-01-26 12:12:12 -0800 | [diff] [blame] | 386 | &newchannel->offermsg.offer.if_type, |
| 387 | &newchannel->offermsg.offer.if_instance, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 388 | newchannel); |
Vitaly Kuznetsov | 9c3a6f7 | 2015-01-20 16:45:04 +0100 | [diff] [blame] | 389 | if (!newchannel->device_obj) |
K. Y. Srinivasan | 5b1e5b5 | 2015-02-28 11:18:19 -0800 | [diff] [blame] | 390 | goto err_deq_chan; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 391 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 392 | /* |
| 393 | * Add the new device to the bus. This will kick off device-driver |
| 394 | * binding which eventually invokes the device driver's AddDevice() |
| 395 | * method. |
| 396 | */ |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 397 | ret = vmbus_device_register(newchannel->device_obj); |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 398 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 399 | pr_err("unable to add child device object (relid %d)\n", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 400 | newchannel->offermsg.child_relid); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 401 | |
K. Y. Srinivasan | 8b8ee67 | 2011-12-12 09:29:16 -0800 | [diff] [blame] | 402 | kfree(newchannel->device_obj); |
K. Y. Srinivasan | 5b1e5b5 | 2015-02-28 11:18:19 -0800 | [diff] [blame] | 403 | goto err_deq_chan; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 404 | } |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 405 | |
Vitaly Kuznetsov | 9c3a6f7 | 2015-01-20 16:45:04 +0100 | [diff] [blame] | 406 | return; |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 407 | |
K. Y. Srinivasan | 5b1e5b5 | 2015-02-28 11:18:19 -0800 | [diff] [blame] | 408 | err_deq_chan: |
| 409 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
| 410 | list_del(&newchannel->listentry); |
| 411 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
| 412 | |
| 413 | if (newchannel->target_cpu != get_cpu()) { |
| 414 | put_cpu(); |
| 415 | smp_call_function_single(newchannel->target_cpu, |
| 416 | percpu_channel_deq, newchannel, true); |
| 417 | } else { |
| 418 | percpu_channel_deq(newchannel); |
| 419 | put_cpu(); |
| 420 | } |
| 421 | |
Vitaly Kuznetsov | 9c3a6f7 | 2015-01-20 16:45:04 +0100 | [diff] [blame] | 422 | err_free_chan: |
| 423 | free_channel(newchannel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 424 | } |
| 425 | |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 426 | enum { |
| 427 | IDE = 0, |
| 428 | SCSI, |
| 429 | NIC, |
| 430 | MAX_PERF_CHN, |
| 431 | }; |
| 432 | |
| 433 | /* |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 434 | * 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] | 435 | * We attempt to distribute the interrupt load for these devices across |
| 436 | * all available CPUs. |
| 437 | */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 438 | static const struct hv_vmbus_device_id hp_devs[] = { |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 439 | /* IDE */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 440 | { HV_IDE_GUID, }, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 441 | /* Storage - SCSI */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 442 | { HV_SCSI_GUID, }, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 443 | /* Network */ |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 444 | { HV_NIC_GUID, }, |
K. Y. Srinivasan | 04653a0 | 2015-02-27 11:26:05 -0800 | [diff] [blame] | 445 | /* NetworkDirect Guest RDMA */ |
| 446 | { HV_ND_GUID, }, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 447 | }; |
| 448 | |
| 449 | |
| 450 | /* |
| 451 | * We use this state to statically distribute the channel interrupt load. |
| 452 | */ |
| 453 | static u32 next_vp; |
| 454 | |
| 455 | /* |
| 456 | * Starting with Win8, we can statically distribute the incoming |
| 457 | * channel interrupt load by binding a channel to VCPU. We |
| 458 | * implement here a simple round robin scheme for distributing |
| 459 | * the interrupt load. |
| 460 | * We will bind channels that are not performance critical to cpu 0 and |
| 461 | * performance critical channels (IDE, SCSI and Network) will be uniformly |
| 462 | * distributed across all available CPUs. |
| 463 | */ |
Linus Torvalds | f9da455 | 2014-06-12 14:27:40 -0700 | [diff] [blame] | 464 | static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_guid) |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 465 | { |
| 466 | u32 cur_cpu; |
| 467 | int i; |
| 468 | bool perf_chn = false; |
| 469 | u32 max_cpus = num_online_cpus(); |
| 470 | |
| 471 | for (i = IDE; i < MAX_PERF_CHN; i++) { |
K. Y. Srinivasan | 7fb9656 | 2013-01-23 17:42:40 -0800 | [diff] [blame] | 472 | if (!memcmp(type_guid->b, hp_devs[i].guid, |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 473 | sizeof(uuid_le))) { |
| 474 | perf_chn = true; |
| 475 | break; |
| 476 | } |
| 477 | } |
| 478 | if ((vmbus_proto_version == VERSION_WS2008) || |
| 479 | (vmbus_proto_version == VERSION_WIN7) || (!perf_chn)) { |
| 480 | /* |
| 481 | * Prior to win8, all channel interrupts are |
| 482 | * delivered on cpu 0. |
| 483 | * Also if the channel is not a performance critical |
| 484 | * channel, bind it to cpu 0. |
| 485 | */ |
K. Y. Srinivasan | d3ba720 | 2014-04-08 18:45:53 -0700 | [diff] [blame] | 486 | channel->target_cpu = 0; |
| 487 | channel->target_vp = 0; |
| 488 | return; |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 489 | } |
| 490 | cur_cpu = (++next_vp % max_cpus); |
K. Y. Srinivasan | d3ba720 | 2014-04-08 18:45:53 -0700 | [diff] [blame] | 491 | channel->target_cpu = cur_cpu; |
| 492 | channel->target_vp = hv_context.vp_index[cur_cpu]; |
K. Y. Srinivasan | a119845 | 2012-12-01 06:46:50 -0800 | [diff] [blame] | 493 | } |
| 494 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 495 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 496 | * vmbus_onoffer - Handler for channel offers from vmbus in parent partition. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 497 | * |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 498 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 499 | static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 500 | { |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 501 | struct vmbus_channel_offer_channel *offer; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 502 | struct vmbus_channel *newchannel; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 503 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 504 | offer = (struct vmbus_channel_offer_channel *)hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 505 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 506 | /* Allocate the channel object and save this offer. */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 507 | newchannel = alloc_channel(); |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 508 | if (!newchannel) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 509 | pr_err("Unable to allocate channel object\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 510 | return; |
| 511 | } |
| 512 | |
K. Y. Srinivasan | 132368b | 2012-12-01 06:46:33 -0800 | [diff] [blame] | 513 | /* |
| 514 | * By default we setup state to enable batched |
| 515 | * reading. A specific service can choose to |
| 516 | * disable this prior to opening the channel. |
| 517 | */ |
| 518 | newchannel->batched_reading = true; |
| 519 | |
K. Y. Srinivasan | b3bf60c | 2012-12-01 06:46:45 -0800 | [diff] [blame] | 520 | /* |
| 521 | * Setup state for signalling the host. |
| 522 | */ |
| 523 | newchannel->sig_event = (struct hv_input_signal_event *) |
| 524 | (ALIGN((unsigned long) |
| 525 | &newchannel->sig_buf, |
| 526 | HV_HYPERCALL_PARAM_ALIGN)); |
| 527 | |
| 528 | newchannel->sig_event->connectionid.asu32 = 0; |
| 529 | newchannel->sig_event->connectionid.u.id = VMBUS_EVENT_CONNECTION_ID; |
| 530 | newchannel->sig_event->flag_number = 0; |
| 531 | newchannel->sig_event->rsvdz = 0; |
| 532 | |
| 533 | if (vmbus_proto_version != VERSION_WS2008) { |
| 534 | newchannel->is_dedicated_interrupt = |
| 535 | (offer->is_dedicated_interrupt != 0); |
| 536 | newchannel->sig_event->connectionid.u.id = |
| 537 | offer->connection_id; |
| 538 | } |
| 539 | |
K. Y. Srinivasan | d3ba720 | 2014-04-08 18:45:53 -0700 | [diff] [blame] | 540 | init_vp_index(newchannel, &offer->offer.if_type); |
K. Y. Srinivasan | abbf3b2 | 2012-12-01 06:46:48 -0800 | [diff] [blame] | 541 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 542 | memcpy(&newchannel->offermsg, offer, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 543 | sizeof(struct vmbus_channel_offer_channel)); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 544 | newchannel->monitor_grp = (u8)offer->monitorid / 32; |
| 545 | newchannel->monitor_bit = (u8)offer->monitorid % 32; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 546 | |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 547 | vmbus_process_offer(newchannel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 548 | } |
| 549 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 550 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 551 | * vmbus_onoffer_rescind - Rescind offer handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 552 | * |
| 553 | * We queue a work item to process this offer synchronously |
| 554 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 555 | static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 556 | { |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 557 | struct vmbus_channel_rescind_offer *rescind; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 558 | struct vmbus_channel *channel; |
Vitaly Kuznetsov | d7f2fba | 2015-01-20 16:45:06 +0100 | [diff] [blame] | 559 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 560 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 561 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 562 | channel = relid2channel(rescind->child_relid); |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 563 | |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 564 | if (channel == NULL) { |
| 565 | hv_process_channel_removal(NULL, rescind->child_relid); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 566 | return; |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 567 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 568 | |
Vitaly Kuznetsov | d7f2fba | 2015-01-20 16:45:06 +0100 | [diff] [blame] | 569 | spin_lock_irqsave(&channel->lock, flags); |
Haiyang Zhang | c3582a2 | 2014-12-01 13:28:39 -0800 | [diff] [blame] | 570 | channel->rescind = true; |
Vitaly Kuznetsov | d7f2fba | 2015-01-20 16:45:06 +0100 | [diff] [blame] | 571 | spin_unlock_irqrestore(&channel->lock, flags); |
K. Y. Srinivasan | 2dd37cb | 2015-02-28 11:18:18 -0800 | [diff] [blame] | 572 | |
| 573 | if (channel->device_obj) { |
| 574 | /* |
| 575 | * We will have to unregister this device from the |
| 576 | * driver core. Do this in the per-channel work context. |
| 577 | * Note that we are currently executing on the global |
| 578 | * workq for handling messages from the host. |
| 579 | */ |
| 580 | INIT_WORK(&channel->work, vmbus_process_device_unregister); |
| 581 | queue_work(channel->controlwq, &channel->work); |
| 582 | } else { |
| 583 | hv_process_channel_removal(channel, |
| 584 | channel->offermsg.child_relid); |
| 585 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 586 | } |
| 587 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 588 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 589 | * vmbus_onoffers_delivered - |
| 590 | * This is invoked when all offers have been delivered. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 591 | * |
| 592 | * Nothing to do here. |
| 593 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 594 | static void vmbus_onoffers_delivered( |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 595 | struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 596 | { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 597 | } |
| 598 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 599 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 600 | * vmbus_onopen_result - Open result handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 601 | * |
| 602 | * This is invoked when we received a response to our channel open request. |
| 603 | * Find the matching request, copy the response and signal the requesting |
| 604 | * thread. |
| 605 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 606 | static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 607 | { |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 608 | struct vmbus_channel_open_result *result; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 609 | struct vmbus_channel_msginfo *msginfo; |
| 610 | struct vmbus_channel_message_header *requestheader; |
| 611 | struct vmbus_channel_open_channel *openmsg; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 612 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 613 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 614 | result = (struct vmbus_channel_open_result *)hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 615 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 616 | /* |
| 617 | * Find the open msg, copy the result and signal/unblock the wait event |
| 618 | */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 619 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 620 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 621 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 622 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 623 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 624 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 625 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 626 | if (requestheader->msgtype == CHANNELMSG_OPENCHANNEL) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 627 | openmsg = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 628 | (struct vmbus_channel_open_channel *)msginfo->msg; |
| 629 | if (openmsg->child_relid == result->child_relid && |
| 630 | openmsg->openid == result->openid) { |
| 631 | memcpy(&msginfo->response.open_result, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 632 | result, |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 633 | sizeof( |
| 634 | struct vmbus_channel_open_result)); |
| 635 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 636 | break; |
| 637 | } |
| 638 | } |
| 639 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 640 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 641 | } |
| 642 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 643 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 644 | * vmbus_ongpadl_created - GPADL created handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 645 | * |
| 646 | * This is invoked when we received a response to our gpadl create request. |
| 647 | * Find the matching request, copy the response and signal the requesting |
| 648 | * thread. |
| 649 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 650 | static void vmbus_ongpadl_created(struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 651 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 652 | struct vmbus_channel_gpadl_created *gpadlcreated; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 653 | struct vmbus_channel_msginfo *msginfo; |
| 654 | struct vmbus_channel_message_header *requestheader; |
| 655 | struct vmbus_channel_gpadl_header *gpadlheader; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 656 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 657 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 658 | gpadlcreated = (struct vmbus_channel_gpadl_created *)hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 659 | |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 660 | /* |
| 661 | * Find the establish msg, copy the result and signal/unblock the wait |
| 662 | * event |
| 663 | */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 664 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 665 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 666 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 667 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 668 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 669 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 670 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 671 | if (requestheader->msgtype == CHANNELMSG_GPADL_HEADER) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 672 | gpadlheader = |
| 673 | (struct vmbus_channel_gpadl_header *)requestheader; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 674 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 675 | if ((gpadlcreated->child_relid == |
| 676 | gpadlheader->child_relid) && |
| 677 | (gpadlcreated->gpadl == gpadlheader->gpadl)) { |
| 678 | memcpy(&msginfo->response.gpadl_created, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 679 | gpadlcreated, |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 680 | sizeof( |
| 681 | struct vmbus_channel_gpadl_created)); |
| 682 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 683 | break; |
| 684 | } |
| 685 | } |
| 686 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 687 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 688 | } |
| 689 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 690 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 691 | * vmbus_ongpadl_torndown - GPADL torndown handler. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 692 | * |
| 693 | * This is invoked when we received a response to our gpadl teardown request. |
| 694 | * Find the matching request, copy the response and signal the requesting |
| 695 | * thread. |
| 696 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 697 | static void vmbus_ongpadl_torndown( |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 698 | struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 699 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 700 | struct vmbus_channel_gpadl_torndown *gpadl_torndown; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 701 | struct vmbus_channel_msginfo *msginfo; |
| 702 | struct vmbus_channel_message_header *requestheader; |
| 703 | struct vmbus_channel_gpadl_teardown *gpadl_teardown; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 704 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 705 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 706 | gpadl_torndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 707 | |
| 708 | /* |
| 709 | * Find the open msg, copy the result and signal/unblock the wait event |
| 710 | */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 711 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 712 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 713 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 714 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 715 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 716 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 717 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 718 | if (requestheader->msgtype == CHANNELMSG_GPADL_TEARDOWN) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 719 | gpadl_teardown = |
| 720 | (struct vmbus_channel_gpadl_teardown *)requestheader; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 721 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 722 | if (gpadl_torndown->gpadl == gpadl_teardown->gpadl) { |
| 723 | memcpy(&msginfo->response.gpadl_torndown, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 724 | gpadl_torndown, |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 725 | sizeof( |
| 726 | struct vmbus_channel_gpadl_torndown)); |
| 727 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 728 | break; |
| 729 | } |
| 730 | } |
| 731 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 732 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 733 | } |
| 734 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 735 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 736 | * vmbus_onversion_response - Version response handler |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 737 | * |
| 738 | * This is invoked when we received a response to our initiate contact request. |
| 739 | * Find the matching request, copy the response and signal the requesting |
| 740 | * thread. |
| 741 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 742 | static void vmbus_onversion_response( |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 743 | struct vmbus_channel_message_header *hdr) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 744 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 745 | struct vmbus_channel_msginfo *msginfo; |
| 746 | struct vmbus_channel_message_header *requestheader; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 747 | struct vmbus_channel_version_response *version_response; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 748 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 749 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 750 | version_response = (struct vmbus_channel_version_response *)hdr; |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 751 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 752 | |
Hank Janssen | ebb61e5 | 2011-02-18 12:39:57 -0800 | [diff] [blame] | 753 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
| 754 | msglistentry) { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 755 | requestheader = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 756 | (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 757 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 758 | if (requestheader->msgtype == |
| 759 | CHANNELMSG_INITIATE_CONTACT) { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 760 | memcpy(&msginfo->response.version_response, |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 761 | version_response, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 762 | sizeof(struct vmbus_channel_version_response)); |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 763 | complete(&msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 764 | } |
| 765 | } |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 766 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 767 | } |
| 768 | |
Greg Kroah-Hartman | c8212f0 | 2009-08-31 21:51:50 -0700 | [diff] [blame] | 769 | /* Channel message dispatch table */ |
| 770 | static struct vmbus_channel_message_table_entry |
K. Y. Srinivasan | b7c6b02 | 2011-05-10 07:55:38 -0700 | [diff] [blame] | 771 | channel_message_table[CHANNELMSG_COUNT] = { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 772 | {CHANNELMSG_INVALID, NULL}, |
| 773 | {CHANNELMSG_OFFERCHANNEL, vmbus_onoffer}, |
| 774 | {CHANNELMSG_RESCIND_CHANNELOFFER, vmbus_onoffer_rescind}, |
| 775 | {CHANNELMSG_REQUESTOFFERS, NULL}, |
| 776 | {CHANNELMSG_ALLOFFERS_DELIVERED, vmbus_onoffers_delivered}, |
| 777 | {CHANNELMSG_OPENCHANNEL, NULL}, |
| 778 | {CHANNELMSG_OPENCHANNEL_RESULT, vmbus_onopen_result}, |
| 779 | {CHANNELMSG_CLOSECHANNEL, NULL}, |
| 780 | {CHANNELMSG_GPADL_HEADER, NULL}, |
| 781 | {CHANNELMSG_GPADL_BODY, NULL}, |
| 782 | {CHANNELMSG_GPADL_CREATED, vmbus_ongpadl_created}, |
| 783 | {CHANNELMSG_GPADL_TEARDOWN, NULL}, |
| 784 | {CHANNELMSG_GPADL_TORNDOWN, vmbus_ongpadl_torndown}, |
| 785 | {CHANNELMSG_RELID_RELEASED, NULL}, |
| 786 | {CHANNELMSG_INITIATE_CONTACT, NULL}, |
| 787 | {CHANNELMSG_VERSION_RESPONSE, vmbus_onversion_response}, |
| 788 | {CHANNELMSG_UNLOAD, NULL}, |
Greg Kroah-Hartman | c8212f0 | 2009-08-31 21:51:50 -0700 | [diff] [blame] | 789 | }; |
| 790 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 791 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 792 | * vmbus_onmessage - Handler for channel protocol messages. |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 793 | * |
| 794 | * This is invoked in the vmbus worker thread context. |
| 795 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 796 | void vmbus_onmessage(void *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 797 | { |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 798 | struct hv_message *msg = context; |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 799 | struct vmbus_channel_message_header *hdr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 800 | int size; |
| 801 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 802 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
| 803 | size = msg->header.payload_size; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 804 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 805 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 806 | pr_err("Received invalid channel message type %d size %d\n", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 807 | hdr->msgtype, size); |
Greg Kroah-Hartman | 04f50c4 | 2009-07-16 12:35:37 -0700 | [diff] [blame] | 808 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 809 | (unsigned char *)msg->u.payload, size); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 810 | return; |
| 811 | } |
| 812 | |
K. Y. Srinivasan | b7c6b02 | 2011-05-10 07:55:38 -0700 | [diff] [blame] | 813 | if (channel_message_table[hdr->msgtype].message_handler) |
| 814 | channel_message_table[hdr->msgtype].message_handler(hdr); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 815 | else |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 816 | pr_err("Unhandled channel message type %d\n", hdr->msgtype); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 817 | } |
| 818 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 819 | /* |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 820 | * 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] | 821 | */ |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 822 | int vmbus_request_offers(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 823 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 824 | struct vmbus_channel_message_header *msg; |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 825 | struct vmbus_channel_msginfo *msginfo; |
Nicholas Mc Guire | 51e5181 | 2015-02-27 11:26:02 -0800 | [diff] [blame] | 826 | int ret; |
| 827 | unsigned long t; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 828 | |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 829 | msginfo = kmalloc(sizeof(*msginfo) + |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 830 | sizeof(struct vmbus_channel_message_header), |
| 831 | GFP_KERNEL); |
Haiyang Zhang | 188963e | 2010-10-15 10:14:06 -0700 | [diff] [blame] | 832 | if (!msginfo) |
Bill Pemberton | 75910f2 | 2010-05-05 15:27:31 -0400 | [diff] [blame] | 833 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 834 | |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 835 | init_completion(&msginfo->waitevent); |
Bill Pemberton | 75910f2 | 2010-05-05 15:27:31 -0400 | [diff] [blame] | 836 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 837 | msg = (struct vmbus_channel_message_header *)msginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 838 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 839 | msg->msgtype = CHANNELMSG_REQUESTOFFERS; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 840 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 841 | |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 842 | ret = vmbus_post_msg(msg, |
Greg Kroah-Hartman | bd60c33 | 2009-08-31 21:47:21 -0700 | [diff] [blame] | 843 | sizeof(struct vmbus_channel_message_header)); |
| 844 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 845 | pr_err("Unable to request offers - %d\n", ret); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 846 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 847 | goto cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 848 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 849 | |
K. Y. Srinivasan | 2dfde96 | 2011-06-16 13:16:34 -0700 | [diff] [blame] | 850 | t = wait_for_completion_timeout(&msginfo->waitevent, 5*HZ); |
K. Y. Srinivasan | 9568a19 | 2011-05-10 07:55:39 -0700 | [diff] [blame] | 851 | if (t == 0) { |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 852 | ret = -ETIMEDOUT; |
| 853 | goto cleanup; |
| 854 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 855 | |
| 856 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 857 | |
| 858 | cleanup: |
Ilia Mirkin | dd9b15d | 2011-03-13 00:29:00 -0500 | [diff] [blame] | 859 | kfree(msginfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 860 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 861 | return ret; |
| 862 | } |
| 863 | |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 864 | /* |
| 865 | * Retrieve the (sub) channel on which to send an outgoing request. |
K. Y. Srinivasan | a13e8bb | 2015-02-28 11:39:02 -0800 | [diff] [blame^] | 866 | * When a primary channel has multiple sub-channels, we try to |
| 867 | * distribute the load equally amongst all available channels. |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 868 | */ |
| 869 | struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary) |
| 870 | { |
| 871 | struct list_head *cur, *tmp; |
K. Y. Srinivasan | 87712bf8 | 2014-12-14 23:34:51 -0800 | [diff] [blame] | 872 | int cur_cpu; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 873 | struct vmbus_channel *cur_channel; |
| 874 | struct vmbus_channel *outgoing_channel = primary; |
K. Y. Srinivasan | a13e8bb | 2015-02-28 11:39:02 -0800 | [diff] [blame^] | 875 | int next_channel; |
| 876 | int i = 1; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 877 | |
| 878 | if (list_empty(&primary->sc_list)) |
| 879 | return outgoing_channel; |
| 880 | |
K. Y. Srinivasan | a13e8bb | 2015-02-28 11:39:02 -0800 | [diff] [blame^] | 881 | next_channel = primary->next_oc++; |
| 882 | |
| 883 | if (next_channel > (primary->num_sc)) { |
| 884 | primary->next_oc = 0; |
| 885 | return outgoing_channel; |
| 886 | } |
| 887 | |
K. Y. Srinivasan | 87712bf8 | 2014-12-14 23:34:51 -0800 | [diff] [blame] | 888 | cur_cpu = hv_context.vp_index[get_cpu()]; |
| 889 | put_cpu(); |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 890 | list_for_each_safe(cur, tmp, &primary->sc_list) { |
| 891 | cur_channel = list_entry(cur, struct vmbus_channel, sc_list); |
| 892 | if (cur_channel->state != CHANNEL_OPENED_STATE) |
| 893 | continue; |
| 894 | |
| 895 | if (cur_channel->target_vp == cur_cpu) |
| 896 | return cur_channel; |
| 897 | |
K. Y. Srinivasan | a13e8bb | 2015-02-28 11:39:02 -0800 | [diff] [blame^] | 898 | if (i == next_channel) |
| 899 | return cur_channel; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 900 | |
K. Y. Srinivasan | a13e8bb | 2015-02-28 11:39:02 -0800 | [diff] [blame^] | 901 | i++; |
K. Y. Srinivasan | e68d297 | 2013-05-23 12:02:32 -0700 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | return outgoing_channel; |
| 905 | } |
| 906 | EXPORT_SYMBOL_GPL(vmbus_get_outgoing_channel); |
| 907 | |
| 908 | static void invoke_sc_cb(struct vmbus_channel *primary_channel) |
| 909 | { |
| 910 | struct list_head *cur, *tmp; |
| 911 | struct vmbus_channel *cur_channel; |
| 912 | |
| 913 | if (primary_channel->sc_creation_callback == NULL) |
| 914 | return; |
| 915 | |
| 916 | list_for_each_safe(cur, tmp, &primary_channel->sc_list) { |
| 917 | cur_channel = list_entry(cur, struct vmbus_channel, sc_list); |
| 918 | |
| 919 | primary_channel->sc_creation_callback(cur_channel); |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel, |
| 924 | void (*sc_cr_cb)(struct vmbus_channel *new_sc)) |
| 925 | { |
| 926 | primary_channel->sc_creation_callback = sc_cr_cb; |
| 927 | } |
| 928 | EXPORT_SYMBOL_GPL(vmbus_set_sc_create_callback); |
| 929 | |
| 930 | bool vmbus_are_subchannels_present(struct vmbus_channel *primary) |
| 931 | { |
| 932 | bool ret; |
| 933 | |
| 934 | ret = !list_empty(&primary->sc_list); |
| 935 | |
| 936 | if (ret) { |
| 937 | /* |
| 938 | * Invoke the callback on sub-channel creation. |
| 939 | * This will present a uniform interface to the |
| 940 | * clients. |
| 941 | */ |
| 942 | invoke_sc_cb(primary); |
| 943 | } |
| 944 | |
| 945 | return ret; |
| 946 | } |
| 947 | EXPORT_SYMBOL_GPL(vmbus_are_subchannels_present); |