Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. |
Roland Dreier | 33b9b3e | 2006-01-30 14:29:21 -0800 | [diff] [blame] | 3 | * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 4 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. |
| 5 | * Copyright (c) 2005 Voltaire, Inc. All rights reserved. |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 6 | * Copyright (c) 2005 PathScale, Inc. All rights reserved. |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 7 | * |
| 8 | * This software is available to you under a choice of one of two |
| 9 | * licenses. You may choose to be licensed under the terms of the GNU |
| 10 | * General Public License (GPL) Version 2, available from the file |
| 11 | * COPYING in the main directory of this source tree, or the |
| 12 | * OpenIB.org BSD license below: |
| 13 | * |
| 14 | * Redistribution and use in source and binary forms, with or |
| 15 | * without modification, are permitted provided that the following |
| 16 | * conditions are met: |
| 17 | * |
| 18 | * - Redistributions of source code must retain the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer. |
| 21 | * |
| 22 | * - Redistributions in binary form must reproduce the above |
| 23 | * copyright notice, this list of conditions and the following |
| 24 | * disclaimer in the documentation and/or other materials |
| 25 | * provided with the distribution. |
| 26 | * |
| 27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 28 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 29 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 30 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 31 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 32 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 33 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 34 | * SOFTWARE. |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 35 | */ |
| 36 | |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/device.h> |
| 40 | #include <linux/err.h> |
| 41 | #include <linux/fs.h> |
| 42 | #include <linux/poll.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 43 | #include <linux/sched.h> |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 44 | #include <linux/file.h> |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 45 | #include <linux/cdev.h> |
Roland Dreier | a265e55 | 2010-02-24 16:51:20 -0800 | [diff] [blame] | 46 | #include <linux/anon_inodes.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 47 | #include <linux/slab.h> |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 48 | |
| 49 | #include <asm/uaccess.h> |
| 50 | |
| 51 | #include "uverbs.h" |
| 52 | |
| 53 | MODULE_AUTHOR("Roland Dreier"); |
| 54 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); |
| 55 | MODULE_LICENSE("Dual BSD/GPL"); |
| 56 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 57 | enum { |
| 58 | IB_UVERBS_MAJOR = 231, |
| 59 | IB_UVERBS_BASE_MINOR = 192, |
| 60 | IB_UVERBS_MAX_DEVICES = 32 |
| 61 | }; |
| 62 | |
| 63 | #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) |
| 64 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 65 | static struct class *uverbs_class; |
| 66 | |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 67 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 68 | DEFINE_IDR(ib_uverbs_pd_idr); |
| 69 | DEFINE_IDR(ib_uverbs_mr_idr); |
| 70 | DEFINE_IDR(ib_uverbs_mw_idr); |
| 71 | DEFINE_IDR(ib_uverbs_ah_idr); |
| 72 | DEFINE_IDR(ib_uverbs_cq_idr); |
| 73 | DEFINE_IDR(ib_uverbs_qp_idr); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 74 | DEFINE_IDR(ib_uverbs_srq_idr); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 75 | |
Roland Dreier | 6276e08 | 2009-09-05 20:24:23 -0700 | [diff] [blame] | 76 | static DEFINE_SPINLOCK(map_lock); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 77 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
| 78 | |
| 79 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, |
| 80 | const char __user *buf, int in_len, |
| 81 | int out_len) = { |
Alexander Chiang | 9afed76 | 2010-02-02 19:08:19 +0000 | [diff] [blame] | 82 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
| 83 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, |
| 84 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, |
| 85 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, |
| 86 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, |
| 87 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, |
| 88 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 89 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
Alexander Chiang | 9afed76 | 2010-02-02 19:08:19 +0000 | [diff] [blame] | 90 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
| 91 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, |
| 92 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, |
| 93 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, |
| 94 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, |
| 95 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, |
| 96 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, |
| 97 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, |
| 98 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, |
| 99 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, |
| 100 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, |
| 101 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, |
| 102 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, |
| 103 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, |
| 104 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, |
| 105 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, |
| 106 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, |
| 107 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, |
| 108 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, |
| 109 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 110 | }; |
| 111 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 112 | static void ib_uverbs_add_one(struct ib_device *device); |
| 113 | static void ib_uverbs_remove_one(struct ib_device *device); |
| 114 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 115 | static void ib_uverbs_release_dev(struct kref *ref) |
| 116 | { |
| 117 | struct ib_uverbs_device *dev = |
| 118 | container_of(ref, struct ib_uverbs_device, ref); |
| 119 | |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 120 | complete(&dev->comp); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Roland Dreier | 04d29b0 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 123 | static void ib_uverbs_release_event_file(struct kref *ref) |
| 124 | { |
| 125 | struct ib_uverbs_event_file *file = |
| 126 | container_of(ref, struct ib_uverbs_event_file, ref); |
| 127 | |
| 128 | kfree(file); |
| 129 | } |
| 130 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 131 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
| 132 | struct ib_uverbs_event_file *ev_file, |
| 133 | struct ib_ucq_object *uobj) |
| 134 | { |
| 135 | struct ib_uverbs_event *evt, *tmp; |
| 136 | |
| 137 | if (ev_file) { |
| 138 | spin_lock_irq(&ev_file->lock); |
| 139 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { |
| 140 | list_del(&evt->list); |
| 141 | kfree(evt); |
| 142 | } |
| 143 | spin_unlock_irq(&ev_file->lock); |
| 144 | |
| 145 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); |
| 146 | } |
| 147 | |
| 148 | spin_lock_irq(&file->async_file->lock); |
| 149 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { |
| 150 | list_del(&evt->list); |
| 151 | kfree(evt); |
| 152 | } |
| 153 | spin_unlock_irq(&file->async_file->lock); |
| 154 | } |
| 155 | |
| 156 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, |
| 157 | struct ib_uevent_object *uobj) |
| 158 | { |
| 159 | struct ib_uverbs_event *evt, *tmp; |
| 160 | |
| 161 | spin_lock_irq(&file->async_file->lock); |
| 162 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { |
| 163 | list_del(&evt->list); |
| 164 | kfree(evt); |
| 165 | } |
| 166 | spin_unlock_irq(&file->async_file->lock); |
| 167 | } |
| 168 | |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 169 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
| 170 | struct ib_uqp_object *uobj) |
| 171 | { |
| 172 | struct ib_uverbs_mcast_entry *mcast, *tmp; |
| 173 | |
| 174 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { |
| 175 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); |
| 176 | list_del(&mcast->list); |
| 177 | kfree(mcast); |
| 178 | } |
| 179 | } |
| 180 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 181 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
| 182 | struct ib_ucontext *context) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 183 | { |
| 184 | struct ib_uobject *uobj, *tmp; |
| 185 | |
| 186 | if (!context) |
| 187 | return 0; |
| 188 | |
Roland Dreier | f7c6a7b | 2007-03-04 16:15:11 -0800 | [diff] [blame] | 189 | context->closing = 1; |
| 190 | |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 191 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 192 | struct ib_ah *ah = uobj->object; |
| 193 | |
| 194 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 195 | ib_destroy_ah(ah); |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 196 | kfree(uobj); |
| 197 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 198 | |
| 199 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 200 | struct ib_qp *qp = uobj->object; |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 201 | struct ib_uqp_object *uqp = |
| 202 | container_of(uobj, struct ib_uqp_object, uevent.uobject); |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 203 | |
| 204 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 205 | ib_uverbs_detach_umcast(qp, uqp); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 206 | ib_destroy_qp(qp); |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 207 | ib_uverbs_release_uevent(file, &uqp->uevent); |
| 208 | kfree(uqp); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 212 | struct ib_cq *cq = uobj->object; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 213 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
| 214 | struct ib_ucq_object *ucq = |
| 215 | container_of(uobj, struct ib_ucq_object, uobject); |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 216 | |
| 217 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 218 | ib_destroy_cq(cq); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 219 | ib_uverbs_release_ucq(file, ev_file, ucq); |
| 220 | kfree(ucq); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 221 | } |
| 222 | |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 223 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 224 | struct ib_srq *srq = uobj->object; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 225 | struct ib_uevent_object *uevent = |
| 226 | container_of(uobj, struct ib_uevent_object, uobject); |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 227 | |
| 228 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 229 | ib_destroy_srq(srq); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 230 | ib_uverbs_release_uevent(file, uevent); |
| 231 | kfree(uevent); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 234 | /* XXX Free MWs */ |
| 235 | |
| 236 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 237 | struct ib_mr *mr = uobj->object; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 238 | |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 239 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 240 | ib_dereg_mr(mr); |
Roland Dreier | f7c6a7b | 2007-03-04 16:15:11 -0800 | [diff] [blame] | 241 | kfree(uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 245 | struct ib_pd *pd = uobj->object; |
| 246 | |
| 247 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 248 | ib_dealloc_pd(pd); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 249 | kfree(uobj); |
| 250 | } |
| 251 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 252 | return context->device->dealloc_ucontext(context); |
| 253 | } |
| 254 | |
| 255 | static void ib_uverbs_release_file(struct kref *ref) |
| 256 | { |
| 257 | struct ib_uverbs_file *file = |
| 258 | container_of(ref, struct ib_uverbs_file, ref); |
| 259 | |
| 260 | module_put(file->device->ib_dev->owner); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 261 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
| 262 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 263 | kfree(file); |
| 264 | } |
| 265 | |
| 266 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, |
| 267 | size_t count, loff_t *pos) |
| 268 | { |
| 269 | struct ib_uverbs_event_file *file = filp->private_data; |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 270 | struct ib_uverbs_event *event; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 271 | int eventsz; |
| 272 | int ret = 0; |
| 273 | |
| 274 | spin_lock_irq(&file->lock); |
| 275 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 276 | while (list_empty(&file->event_list)) { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 277 | spin_unlock_irq(&file->lock); |
| 278 | |
| 279 | if (filp->f_flags & O_NONBLOCK) |
| 280 | return -EAGAIN; |
| 281 | |
| 282 | if (wait_event_interruptible(file->poll_wait, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 283 | !list_empty(&file->event_list))) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 284 | return -ERESTARTSYS; |
| 285 | |
| 286 | spin_lock_irq(&file->lock); |
| 287 | } |
| 288 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 289 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
| 290 | |
| 291 | if (file->is_async) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 292 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 293 | else |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 294 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 295 | |
| 296 | if (eventsz > count) { |
| 297 | ret = -EINVAL; |
| 298 | event = NULL; |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 299 | } else { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 300 | list_del(file->event_list.next); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 301 | if (event->counter) { |
| 302 | ++(*event->counter); |
| 303 | list_del(&event->obj_list); |
| 304 | } |
| 305 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 306 | |
| 307 | spin_unlock_irq(&file->lock); |
| 308 | |
| 309 | if (event) { |
| 310 | if (copy_to_user(buf, event, eventsz)) |
| 311 | ret = -EFAULT; |
| 312 | else |
| 313 | ret = eventsz; |
| 314 | } |
| 315 | |
| 316 | kfree(event); |
| 317 | |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | static unsigned int ib_uverbs_event_poll(struct file *filp, |
| 322 | struct poll_table_struct *wait) |
| 323 | { |
| 324 | unsigned int pollflags = 0; |
| 325 | struct ib_uverbs_event_file *file = filp->private_data; |
| 326 | |
| 327 | poll_wait(filp, &file->poll_wait, wait); |
| 328 | |
| 329 | spin_lock_irq(&file->lock); |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 330 | if (!list_empty(&file->event_list)) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 331 | pollflags = POLLIN | POLLRDNORM; |
| 332 | spin_unlock_irq(&file->lock); |
| 333 | |
| 334 | return pollflags; |
| 335 | } |
| 336 | |
Gleb Natapov | abdf119 | 2005-07-27 14:40:00 -0700 | [diff] [blame] | 337 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
| 338 | { |
| 339 | struct ib_uverbs_event_file *file = filp->private_data; |
| 340 | |
| 341 | return fasync_helper(fd, filp, on, &file->async_queue); |
| 342 | } |
| 343 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 344 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
| 345 | { |
| 346 | struct ib_uverbs_event_file *file = filp->private_data; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 347 | struct ib_uverbs_event *entry, *tmp; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 348 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 349 | spin_lock_irq(&file->lock); |
Roland Dreier | 1ae5c18 | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 350 | file->is_closed = 1; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 351 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
| 352 | if (entry->counter) |
| 353 | list_del(&entry->obj_list); |
| 354 | kfree(entry); |
| 355 | } |
| 356 | spin_unlock_irq(&file->lock); |
| 357 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 358 | if (file->is_async) { |
| 359 | ib_unregister_event_handler(&file->uverbs_file->event_handler); |
| 360 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); |
| 361 | } |
| 362 | kref_put(&file->ref, ib_uverbs_release_event_file); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 363 | |
| 364 | return 0; |
| 365 | } |
| 366 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 367 | static const struct file_operations uverbs_event_fops = { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 368 | .owner = THIS_MODULE, |
Alexander Chiang | 9afed76 | 2010-02-02 19:08:19 +0000 | [diff] [blame] | 369 | .read = ib_uverbs_event_read, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 370 | .poll = ib_uverbs_event_poll, |
Gleb Natapov | abdf119 | 2005-07-27 14:40:00 -0700 | [diff] [blame] | 371 | .release = ib_uverbs_event_close, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 372 | .fasync = ib_uverbs_event_fasync, |
| 373 | .llseek = no_llseek, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 374 | }; |
| 375 | |
| 376 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) |
| 377 | { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 378 | struct ib_uverbs_event_file *file = cq_context; |
| 379 | struct ib_ucq_object *uobj; |
| 380 | struct ib_uverbs_event *entry; |
| 381 | unsigned long flags; |
| 382 | |
| 383 | if (!file) |
| 384 | return; |
| 385 | |
| 386 | spin_lock_irqsave(&file->lock, flags); |
Roland Dreier | 1ae5c18 | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 387 | if (file->is_closed) { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 388 | spin_unlock_irqrestore(&file->lock, flags); |
| 389 | return; |
| 390 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 391 | |
| 392 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 393 | if (!entry) { |
| 394 | spin_unlock_irqrestore(&file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 395 | return; |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 396 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 397 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 398 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
| 399 | |
| 400 | entry->desc.comp.cq_handle = cq->uobject->user_handle; |
| 401 | entry->counter = &uobj->comp_events_reported; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 402 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 403 | list_add_tail(&entry->list, &file->event_list); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 404 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 405 | spin_unlock_irqrestore(&file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 406 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 407 | wake_up_interruptible(&file->poll_wait); |
| 408 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 412 | __u64 element, __u64 event, |
| 413 | struct list_head *obj_list, |
| 414 | u32 *counter) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 415 | { |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 416 | struct ib_uverbs_event *entry; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 417 | unsigned long flags; |
| 418 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 419 | spin_lock_irqsave(&file->async_file->lock, flags); |
Jack Morgenstein | fb77bce | 2008-06-18 15:36:38 -0700 | [diff] [blame] | 420 | if (file->async_file->is_closed) { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 421 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
| 422 | return; |
| 423 | } |
| 424 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 425 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 426 | if (!entry) { |
| 427 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 428 | return; |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 429 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 430 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 431 | entry->desc.async.element = element; |
| 432 | entry->desc.async.event_type = event; |
| 433 | entry->counter = counter; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 434 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 435 | list_add_tail(&entry->list, &file->async_file->event_list); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 436 | if (obj_list) |
| 437 | list_add_tail(&entry->obj_list, obj_list); |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 438 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 439 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 440 | wake_up_interruptible(&file->async_file->poll_wait); |
| 441 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) |
| 445 | { |
Roland Dreier | 7162a3e | 2005-10-30 09:50:04 -0800 | [diff] [blame] | 446 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
| 447 | struct ib_ucq_object, uobject); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 448 | |
Roland Dreier | 7162a3e | 2005-10-30 09:50:04 -0800 | [diff] [blame] | 449 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 450 | event->event, &uobj->async_list, |
| 451 | &uobj->async_events_reported); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) |
| 455 | { |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 456 | struct ib_uevent_object *uobj; |
| 457 | |
| 458 | uobj = container_of(event->element.qp->uobject, |
| 459 | struct ib_uevent_object, uobject); |
| 460 | |
| 461 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, |
| 462 | event->event, &uobj->event_list, |
| 463 | &uobj->events_reported); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 464 | } |
| 465 | |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 466 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
| 467 | { |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 468 | struct ib_uevent_object *uobj; |
| 469 | |
| 470 | uobj = container_of(event->element.srq->uobject, |
| 471 | struct ib_uevent_object, uobject); |
| 472 | |
| 473 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, |
| 474 | event->event, &uobj->event_list, |
| 475 | &uobj->events_reported); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 476 | } |
| 477 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 478 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
| 479 | struct ib_event *event) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 480 | { |
| 481 | struct ib_uverbs_file *file = |
| 482 | container_of(handler, struct ib_uverbs_file, event_handler); |
| 483 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 484 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
| 485 | NULL, NULL); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 488 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
Al Viro | b1e4594 | 2010-01-18 01:38:00 -0500 | [diff] [blame] | 489 | int is_async) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 490 | { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 491 | struct ib_uverbs_event_file *ev_file; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 492 | struct file *filp; |
| 493 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 494 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
| 495 | if (!ev_file) |
| 496 | return ERR_PTR(-ENOMEM); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 497 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 498 | kref_init(&ev_file->ref); |
| 499 | spin_lock_init(&ev_file->lock); |
| 500 | INIT_LIST_HEAD(&ev_file->event_list); |
| 501 | init_waitqueue_head(&ev_file->poll_wait); |
| 502 | ev_file->uverbs_file = uverbs_file; |
| 503 | ev_file->async_queue = NULL; |
| 504 | ev_file->is_async = is_async; |
Roland Dreier | 1ae5c18 | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 505 | ev_file->is_closed = 0; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 506 | |
Al Viro | b1e4594 | 2010-01-18 01:38:00 -0500 | [diff] [blame] | 507 | filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops, |
Roland Dreier | a265e55 | 2010-02-24 16:51:20 -0800 | [diff] [blame] | 508 | ev_file, O_RDONLY); |
Al Viro | b1e4594 | 2010-01-18 01:38:00 -0500 | [diff] [blame] | 509 | if (IS_ERR(filp)) |
| 510 | kfree(ev_file); |
Roland Dreier | a7dab9e | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 511 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 512 | return filp; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | /* |
| 516 | * Look up a completion event file by FD. If lookup is successful, |
| 517 | * takes a ref to the event file struct that it returns; if |
| 518 | * unsuccessful, returns NULL. |
| 519 | */ |
| 520 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) |
| 521 | { |
| 522 | struct ib_uverbs_event_file *ev_file = NULL; |
| 523 | struct file *filp; |
| 524 | |
| 525 | filp = fget(fd); |
| 526 | if (!filp) |
| 527 | return NULL; |
| 528 | |
| 529 | if (filp->f_op != &uverbs_event_fops) |
| 530 | goto out; |
| 531 | |
| 532 | ev_file = filp->private_data; |
| 533 | if (ev_file->is_async) { |
| 534 | ev_file = NULL; |
| 535 | goto out; |
| 536 | } |
| 537 | |
| 538 | kref_get(&ev_file->ref); |
| 539 | |
| 540 | out: |
| 541 | fput(filp); |
| 542 | return ev_file; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, |
| 546 | size_t count, loff_t *pos) |
| 547 | { |
| 548 | struct ib_uverbs_file *file = filp->private_data; |
| 549 | struct ib_uverbs_cmd_hdr hdr; |
| 550 | |
| 551 | if (count < sizeof hdr) |
| 552 | return -EINVAL; |
| 553 | |
| 554 | if (copy_from_user(&hdr, buf, sizeof hdr)) |
| 555 | return -EFAULT; |
| 556 | |
| 557 | if (hdr.in_words * 4 != count) |
| 558 | return -EINVAL; |
| 559 | |
Roland Dreier | 63c47c2 | 2005-09-26 13:01:03 -0700 | [diff] [blame] | 560 | if (hdr.command < 0 || |
| 561 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || |
Jack Morgenstein | b1b8afb | 2009-09-05 20:24:24 -0700 | [diff] [blame] | 562 | !uverbs_cmd_table[hdr.command]) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 563 | return -EINVAL; |
| 564 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 565 | if (!file->ucontext && |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 566 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
| 567 | return -EINVAL; |
| 568 | |
Jack Morgenstein | b1b8afb | 2009-09-05 20:24:24 -0700 | [diff] [blame] | 569 | if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) |
| 570 | return -ENOSYS; |
| 571 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 572 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, |
| 573 | hdr.in_words * 4, hdr.out_words * 4); |
| 574 | } |
| 575 | |
| 576 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) |
| 577 | { |
| 578 | struct ib_uverbs_file *file = filp->private_data; |
| 579 | |
| 580 | if (!file->ucontext) |
| 581 | return -ENODEV; |
| 582 | else |
| 583 | return file->device->ib_dev->mmap(file->ucontext, vma); |
| 584 | } |
| 585 | |
Roland Dreier | 5b2d281 | 2008-06-27 14:43:20 -0700 | [diff] [blame] | 586 | /* |
| 587 | * ib_uverbs_open() does not need the BKL: |
| 588 | * |
Alexander Chiang | 2a72f21 | 2010-02-02 19:07:54 +0000 | [diff] [blame] | 589 | * - the ib_uverbs_device structures are properly reference counted and |
Roland Dreier | 5b2d281 | 2008-06-27 14:43:20 -0700 | [diff] [blame] | 590 | * everything else is purely local to the file being created, so |
| 591 | * races against other open calls are not a problem; |
| 592 | * - there is no ioctl method to race against; |
Alexander Chiang | 2a72f21 | 2010-02-02 19:07:54 +0000 | [diff] [blame] | 593 | * - the open method will either immediately run -ENXIO, or all |
| 594 | * required initialization will be done. |
Roland Dreier | 5b2d281 | 2008-06-27 14:43:20 -0700 | [diff] [blame] | 595 | */ |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 596 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
| 597 | { |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 598 | struct ib_uverbs_device *dev; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 599 | struct ib_uverbs_file *file; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 600 | int ret; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 601 | |
Alexander Chiang | 2a72f21 | 2010-02-02 19:07:54 +0000 | [diff] [blame] | 602 | dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 603 | if (dev) |
| 604 | kref_get(&dev->ref); |
Alexander Chiang | 2a72f21 | 2010-02-02 19:07:54 +0000 | [diff] [blame] | 605 | else |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 606 | return -ENXIO; |
| 607 | |
| 608 | if (!try_module_get(dev->ib_dev->owner)) { |
| 609 | ret = -ENODEV; |
| 610 | goto err; |
| 611 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 612 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 613 | file = kmalloc(sizeof *file, GFP_KERNEL); |
Roland Dreier | 63c47c2 | 2005-09-26 13:01:03 -0700 | [diff] [blame] | 614 | if (!file) { |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 615 | ret = -ENOMEM; |
| 616 | goto err_module; |
Roland Dreier | 63c47c2 | 2005-09-26 13:01:03 -0700 | [diff] [blame] | 617 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 618 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 619 | file->device = dev; |
| 620 | file->ucontext = NULL; |
| 621 | file->async_file = NULL; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 622 | kref_init(&file->ref); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 623 | mutex_init(&file->mutex); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 624 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 625 | filp->private_data = file; |
| 626 | |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 627 | return nonseekable_open(inode, filp); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 628 | |
| 629 | err_module: |
| 630 | module_put(dev->ib_dev->owner); |
| 631 | |
| 632 | err: |
| 633 | kref_put(&dev->ref, ib_uverbs_release_dev); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 634 | return ret; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | static int ib_uverbs_close(struct inode *inode, struct file *filp) |
| 638 | { |
| 639 | struct ib_uverbs_file *file = filp->private_data; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 640 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 641 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 642 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 643 | if (file->async_file) |
| 644 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); |
| 645 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 646 | kref_put(&file->ref, ib_uverbs_release_file); |
| 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 651 | static const struct file_operations uverbs_fops = { |
Alexander Chiang | 9afed76 | 2010-02-02 19:08:19 +0000 | [diff] [blame] | 652 | .owner = THIS_MODULE, |
| 653 | .write = ib_uverbs_write, |
| 654 | .open = ib_uverbs_open, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 655 | .release = ib_uverbs_close, |
| 656 | .llseek = no_llseek, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 657 | }; |
| 658 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 659 | static const struct file_operations uverbs_mmap_fops = { |
Alexander Chiang | 9afed76 | 2010-02-02 19:08:19 +0000 | [diff] [blame] | 660 | .owner = THIS_MODULE, |
| 661 | .write = ib_uverbs_write, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 662 | .mmap = ib_uverbs_mmap, |
Alexander Chiang | 9afed76 | 2010-02-02 19:08:19 +0000 | [diff] [blame] | 663 | .open = ib_uverbs_open, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 664 | .release = ib_uverbs_close, |
| 665 | .llseek = no_llseek, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 666 | }; |
| 667 | |
| 668 | static struct ib_client uverbs_client = { |
| 669 | .name = "uverbs", |
| 670 | .add = ib_uverbs_add_one, |
| 671 | .remove = ib_uverbs_remove_one |
| 672 | }; |
| 673 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 674 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
| 675 | char *buf) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 676 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 677 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 678 | |
| 679 | if (!dev) |
| 680 | return -ENODEV; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 681 | |
| 682 | return sprintf(buf, "%s\n", dev->ib_dev->name); |
| 683 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 684 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 685 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 686 | static ssize_t show_dev_abi_version(struct device *device, |
| 687 | struct device_attribute *attr, char *buf) |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 688 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 689 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 690 | |
| 691 | if (!dev) |
| 692 | return -ENODEV; |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 693 | |
| 694 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); |
| 695 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 696 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 697 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 698 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
| 699 | __stringify(IB_USER_VERBS_ABI_VERSION)); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 700 | |
Alexander Chiang | 6d6a0e7 | 2010-02-02 19:08:09 +0000 | [diff] [blame] | 701 | static dev_t overflow_maj; |
| 702 | static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES); |
| 703 | |
| 704 | /* |
| 705 | * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by |
| 706 | * requesting a new major number and doubling the number of max devices we |
| 707 | * support. It's stupid, but simple. |
| 708 | */ |
| 709 | static int find_overflow_devnum(void) |
| 710 | { |
| 711 | int ret; |
| 712 | |
| 713 | if (!overflow_maj) { |
| 714 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES, |
| 715 | "infiniband_verbs"); |
| 716 | if (ret) { |
| 717 | printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n"); |
| 718 | return ret; |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES); |
| 723 | if (ret >= IB_UVERBS_MAX_DEVICES) |
| 724 | return -1; |
| 725 | |
| 726 | return ret; |
| 727 | } |
| 728 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 729 | static void ib_uverbs_add_one(struct ib_device *device) |
| 730 | { |
Alexander Chiang | 3870798 | 2010-02-02 19:07:59 +0000 | [diff] [blame] | 731 | int devnum; |
Alexander Chiang | ddbd688 | 2010-02-02 19:08:04 +0000 | [diff] [blame] | 732 | dev_t base; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 733 | struct ib_uverbs_device *uverbs_dev; |
| 734 | |
| 735 | if (!device->alloc_ucontext) |
| 736 | return; |
| 737 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 738 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 739 | if (!uverbs_dev) |
| 740 | return; |
| 741 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 742 | kref_init(&uverbs_dev->ref); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 743 | init_completion(&uverbs_dev->comp); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 744 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 745 | spin_lock(&map_lock); |
Alexander Chiang | 3870798 | 2010-02-02 19:07:59 +0000 | [diff] [blame] | 746 | devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
| 747 | if (devnum >= IB_UVERBS_MAX_DEVICES) { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 748 | spin_unlock(&map_lock); |
Alexander Chiang | 6d6a0e7 | 2010-02-02 19:08:09 +0000 | [diff] [blame] | 749 | devnum = find_overflow_devnum(); |
| 750 | if (devnum < 0) |
| 751 | goto err; |
| 752 | |
| 753 | spin_lock(&map_lock); |
| 754 | uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES; |
| 755 | base = devnum + overflow_maj; |
| 756 | set_bit(devnum, overflow_map); |
| 757 | } else { |
| 758 | uverbs_dev->devnum = devnum; |
| 759 | base = devnum + IB_UVERBS_BASE_DEV; |
| 760 | set_bit(devnum, dev_map); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 761 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 762 | spin_unlock(&map_lock); |
| 763 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 764 | uverbs_dev->ib_dev = device; |
Michael S. Tsirkin | f4fd0b2 | 2007-05-03 13:48:47 +0300 | [diff] [blame] | 765 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 766 | |
Alexander Chiang | 055422d | 2010-02-02 19:07:49 +0000 | [diff] [blame] | 767 | cdev_init(&uverbs_dev->cdev, NULL); |
| 768 | uverbs_dev->cdev.owner = THIS_MODULE; |
| 769 | uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; |
| 770 | kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); |
Alexander Chiang | ddbd688 | 2010-02-02 19:08:04 +0000 | [diff] [blame] | 771 | if (cdev_add(&uverbs_dev->cdev, base, 1)) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 772 | goto err_cdev; |
| 773 | |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 774 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
Alexander Chiang | 055422d | 2010-02-02 19:07:49 +0000 | [diff] [blame] | 775 | uverbs_dev->cdev.dev, uverbs_dev, |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 776 | "uverbs%d", uverbs_dev->devnum); |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 777 | if (IS_ERR(uverbs_dev->dev)) |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 778 | goto err_cdev; |
| 779 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 780 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 781 | goto err_class; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 782 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 783 | goto err_class; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 784 | |
| 785 | ib_set_client_data(device, &uverbs_client, uverbs_dev); |
| 786 | |
| 787 | return; |
| 788 | |
| 789 | err_class: |
Alexander Chiang | 055422d | 2010-02-02 19:07:49 +0000 | [diff] [blame] | 790 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 791 | |
| 792 | err_cdev: |
Alexander Chiang | 055422d | 2010-02-02 19:07:49 +0000 | [diff] [blame] | 793 | cdev_del(&uverbs_dev->cdev); |
Alexander Chiang | 6d6a0e7 | 2010-02-02 19:08:09 +0000 | [diff] [blame] | 794 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
| 795 | clear_bit(devnum, dev_map); |
| 796 | else |
| 797 | clear_bit(devnum, overflow_map); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 798 | |
| 799 | err: |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 800 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 801 | wait_for_completion(&uverbs_dev->comp); |
| 802 | kfree(uverbs_dev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 803 | return; |
| 804 | } |
| 805 | |
| 806 | static void ib_uverbs_remove_one(struct ib_device *device) |
| 807 | { |
| 808 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); |
| 809 | |
| 810 | if (!uverbs_dev) |
| 811 | return; |
| 812 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 813 | dev_set_drvdata(uverbs_dev->dev, NULL); |
Alexander Chiang | 055422d | 2010-02-02 19:07:49 +0000 | [diff] [blame] | 814 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
| 815 | cdev_del(&uverbs_dev->cdev); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 816 | |
Alexander Chiang | 6d6a0e7 | 2010-02-02 19:08:09 +0000 | [diff] [blame] | 817 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
| 818 | clear_bit(uverbs_dev->devnum, dev_map); |
| 819 | else |
| 820 | clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 821 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 822 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 823 | wait_for_completion(&uverbs_dev->comp); |
| 824 | kfree(uverbs_dev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 825 | } |
| 826 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 827 | static int __init ib_uverbs_init(void) |
| 828 | { |
| 829 | int ret; |
| 830 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 831 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
| 832 | "infiniband_verbs"); |
| 833 | if (ret) { |
| 834 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); |
| 835 | goto out; |
| 836 | } |
| 837 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 838 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
| 839 | if (IS_ERR(uverbs_class)) { |
| 840 | ret = PTR_ERR(uverbs_class); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 841 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
| 842 | goto out_chrdev; |
| 843 | } |
| 844 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 845 | ret = class_create_file(uverbs_class, &class_attr_abi_version.attr); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 846 | if (ret) { |
| 847 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); |
| 848 | goto out_class; |
| 849 | } |
| 850 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 851 | ret = ib_register_client(&uverbs_client); |
| 852 | if (ret) { |
| 853 | printk(KERN_ERR "user_verbs: couldn't register client\n"); |
Roland Dreier | a265e55 | 2010-02-24 16:51:20 -0800 | [diff] [blame] | 854 | goto out_class; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 855 | } |
| 856 | |
| 857 | return 0; |
| 858 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 859 | out_class: |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 860 | class_destroy(uverbs_class); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 861 | |
| 862 | out_chrdev: |
| 863 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
| 864 | |
| 865 | out: |
| 866 | return ret; |
| 867 | } |
| 868 | |
| 869 | static void __exit ib_uverbs_cleanup(void) |
| 870 | { |
| 871 | ib_unregister_client(&uverbs_client); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 872 | class_destroy(uverbs_class); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 873 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
Alexander Chiang | 6d6a0e7 | 2010-02-02 19:08:09 +0000 | [diff] [blame] | 874 | if (overflow_maj) |
| 875 | unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 876 | idr_destroy(&ib_uverbs_pd_idr); |
| 877 | idr_destroy(&ib_uverbs_mr_idr); |
| 878 | idr_destroy(&ib_uverbs_mw_idr); |
| 879 | idr_destroy(&ib_uverbs_ah_idr); |
| 880 | idr_destroy(&ib_uverbs_cq_idr); |
| 881 | idr_destroy(&ib_uverbs_qp_idr); |
| 882 | idr_destroy(&ib_uverbs_srq_idr); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | module_init(ib_uverbs_init); |
| 886 | module_exit(ib_uverbs_cleanup); |