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> |
| 43 | #include <linux/file.h> |
| 44 | #include <linux/mount.h> |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 45 | #include <linux/cdev.h> |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 46 | |
| 47 | #include <asm/uaccess.h> |
| 48 | |
| 49 | #include "uverbs.h" |
| 50 | |
| 51 | MODULE_AUTHOR("Roland Dreier"); |
| 52 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); |
| 53 | MODULE_LICENSE("Dual BSD/GPL"); |
| 54 | |
| 55 | #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */ |
| 56 | |
| 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 | |
| 76 | static spinlock_t map_lock; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 77 | static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES]; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 78 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
| 79 | |
| 80 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, |
| 81 | const char __user *buf, int in_len, |
| 82 | int out_len) = { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 83 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
| 84 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, |
| 85 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, |
| 86 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, |
| 87 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, |
| 88 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, |
| 89 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, |
| 90 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
| 91 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
Roland Dreier | 33b9b3e | 2006-01-30 14:29:21 -0800 | [diff] [blame] | 92 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 93 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, |
| 94 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 95 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, |
| 96 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, |
Dotan Barak | 7ccc9a2 | 2006-02-13 16:31:25 -0800 | [diff] [blame] | 97 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 98 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, |
| 99 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 100 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, |
| 101 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, |
| 102 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, |
| 103 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, |
| 104 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 105 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, |
| 106 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, |
| 107 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, |
| 108 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, |
Dotan Barak | 8bdb0e8 | 2006-02-13 16:31:57 -0800 | [diff] [blame] | 109 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 110 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | static struct vfsmount *uverbs_event_mnt; |
| 114 | |
| 115 | static void ib_uverbs_add_one(struct ib_device *device); |
| 116 | static void ib_uverbs_remove_one(struct ib_device *device); |
| 117 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 118 | static void ib_uverbs_release_dev(struct kref *ref) |
| 119 | { |
| 120 | struct ib_uverbs_device *dev = |
| 121 | container_of(ref, struct ib_uverbs_device, ref); |
| 122 | |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 123 | complete(&dev->comp); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 124 | } |
| 125 | |
Roland Dreier | 04d29b0 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 126 | static void ib_uverbs_release_event_file(struct kref *ref) |
| 127 | { |
| 128 | struct ib_uverbs_event_file *file = |
| 129 | container_of(ref, struct ib_uverbs_event_file, ref); |
| 130 | |
| 131 | kfree(file); |
| 132 | } |
| 133 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 134 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
| 135 | struct ib_uverbs_event_file *ev_file, |
| 136 | struct ib_ucq_object *uobj) |
| 137 | { |
| 138 | struct ib_uverbs_event *evt, *tmp; |
| 139 | |
| 140 | if (ev_file) { |
| 141 | spin_lock_irq(&ev_file->lock); |
| 142 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { |
| 143 | list_del(&evt->list); |
| 144 | kfree(evt); |
| 145 | } |
| 146 | spin_unlock_irq(&ev_file->lock); |
| 147 | |
| 148 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); |
| 149 | } |
| 150 | |
| 151 | spin_lock_irq(&file->async_file->lock); |
| 152 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { |
| 153 | list_del(&evt->list); |
| 154 | kfree(evt); |
| 155 | } |
| 156 | spin_unlock_irq(&file->async_file->lock); |
| 157 | } |
| 158 | |
| 159 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, |
| 160 | struct ib_uevent_object *uobj) |
| 161 | { |
| 162 | struct ib_uverbs_event *evt, *tmp; |
| 163 | |
| 164 | spin_lock_irq(&file->async_file->lock); |
| 165 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { |
| 166 | list_del(&evt->list); |
| 167 | kfree(evt); |
| 168 | } |
| 169 | spin_unlock_irq(&file->async_file->lock); |
| 170 | } |
| 171 | |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 172 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
| 173 | struct ib_uqp_object *uobj) |
| 174 | { |
| 175 | struct ib_uverbs_mcast_entry *mcast, *tmp; |
| 176 | |
| 177 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { |
| 178 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); |
| 179 | list_del(&mcast->list); |
| 180 | kfree(mcast); |
| 181 | } |
| 182 | } |
| 183 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 184 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
| 185 | struct ib_ucontext *context) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 186 | { |
| 187 | struct ib_uobject *uobj, *tmp; |
| 188 | |
| 189 | if (!context) |
| 190 | return 0; |
| 191 | |
Roland Dreier | f7c6a7b | 2007-03-04 16:15:11 -0800 | [diff] [blame] | 192 | context->closing = 1; |
| 193 | |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 194 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 195 | struct ib_ah *ah = uobj->object; |
| 196 | |
| 197 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 198 | ib_destroy_ah(ah); |
Roland Dreier | 67cdb40 | 2005-10-14 15:26:04 -0700 | [diff] [blame] | 199 | kfree(uobj); |
| 200 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 201 | |
| 202 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 203 | struct ib_qp *qp = uobj->object; |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 204 | struct ib_uqp_object *uqp = |
| 205 | container_of(uobj, struct ib_uqp_object, uevent.uobject); |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 206 | |
| 207 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 208 | ib_uverbs_detach_umcast(qp, uqp); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 209 | ib_destroy_qp(qp); |
Jack Morgenstein | f4e4015 | 2005-11-29 16:57:01 -0800 | [diff] [blame] | 210 | ib_uverbs_release_uevent(file, &uqp->uevent); |
| 211 | kfree(uqp); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 215 | struct ib_cq *cq = uobj->object; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 216 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
| 217 | struct ib_ucq_object *ucq = |
| 218 | container_of(uobj, struct ib_ucq_object, uobject); |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 219 | |
| 220 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 221 | ib_destroy_cq(cq); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 222 | ib_uverbs_release_ucq(file, ev_file, ucq); |
| 223 | kfree(ucq); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 224 | } |
| 225 | |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 226 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 227 | struct ib_srq *srq = uobj->object; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 228 | struct ib_uevent_object *uevent = |
| 229 | container_of(uobj, struct ib_uevent_object, uobject); |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 230 | |
| 231 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 232 | ib_destroy_srq(srq); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 233 | ib_uverbs_release_uevent(file, uevent); |
| 234 | kfree(uevent); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 237 | /* XXX Free MWs */ |
| 238 | |
| 239 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 240 | struct ib_mr *mr = uobj->object; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 241 | |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 242 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 243 | ib_dereg_mr(mr); |
Roland Dreier | f7c6a7b | 2007-03-04 16:15:11 -0800 | [diff] [blame] | 244 | kfree(uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { |
Roland Dreier | 9ead190 | 2006-06-17 20:44:49 -0700 | [diff] [blame] | 248 | struct ib_pd *pd = uobj->object; |
| 249 | |
| 250 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 251 | ib_dealloc_pd(pd); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 252 | kfree(uobj); |
| 253 | } |
| 254 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 255 | return context->device->dealloc_ucontext(context); |
| 256 | } |
| 257 | |
| 258 | static void ib_uverbs_release_file(struct kref *ref) |
| 259 | { |
| 260 | struct ib_uverbs_file *file = |
| 261 | container_of(ref, struct ib_uverbs_file, ref); |
| 262 | |
| 263 | module_put(file->device->ib_dev->owner); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 264 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
| 265 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 266 | kfree(file); |
| 267 | } |
| 268 | |
| 269 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, |
| 270 | size_t count, loff_t *pos) |
| 271 | { |
| 272 | struct ib_uverbs_event_file *file = filp->private_data; |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 273 | struct ib_uverbs_event *event; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 274 | int eventsz; |
| 275 | int ret = 0; |
| 276 | |
| 277 | spin_lock_irq(&file->lock); |
| 278 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 279 | while (list_empty(&file->event_list)) { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 280 | spin_unlock_irq(&file->lock); |
| 281 | |
| 282 | if (filp->f_flags & O_NONBLOCK) |
| 283 | return -EAGAIN; |
| 284 | |
| 285 | if (wait_event_interruptible(file->poll_wait, |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 286 | !list_empty(&file->event_list))) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 287 | return -ERESTARTSYS; |
| 288 | |
| 289 | spin_lock_irq(&file->lock); |
| 290 | } |
| 291 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 292 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
| 293 | |
| 294 | if (file->is_async) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 295 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 296 | else |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 297 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 298 | |
| 299 | if (eventsz > count) { |
| 300 | ret = -EINVAL; |
| 301 | event = NULL; |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 302 | } else { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 303 | list_del(file->event_list.next); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 304 | if (event->counter) { |
| 305 | ++(*event->counter); |
| 306 | list_del(&event->obj_list); |
| 307 | } |
| 308 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 309 | |
| 310 | spin_unlock_irq(&file->lock); |
| 311 | |
| 312 | if (event) { |
| 313 | if (copy_to_user(buf, event, eventsz)) |
| 314 | ret = -EFAULT; |
| 315 | else |
| 316 | ret = eventsz; |
| 317 | } |
| 318 | |
| 319 | kfree(event); |
| 320 | |
| 321 | return ret; |
| 322 | } |
| 323 | |
| 324 | static unsigned int ib_uverbs_event_poll(struct file *filp, |
| 325 | struct poll_table_struct *wait) |
| 326 | { |
| 327 | unsigned int pollflags = 0; |
| 328 | struct ib_uverbs_event_file *file = filp->private_data; |
| 329 | |
| 330 | poll_wait(filp, &file->poll_wait, wait); |
| 331 | |
| 332 | spin_lock_irq(&file->lock); |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 333 | if (!list_empty(&file->event_list)) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 334 | pollflags = POLLIN | POLLRDNORM; |
| 335 | spin_unlock_irq(&file->lock); |
| 336 | |
| 337 | return pollflags; |
| 338 | } |
| 339 | |
Gleb Natapov | abdf119 | 2005-07-27 14:40:00 -0700 | [diff] [blame] | 340 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
| 341 | { |
| 342 | struct ib_uverbs_event_file *file = filp->private_data; |
| 343 | |
| 344 | return fasync_helper(fd, filp, on, &file->async_queue); |
| 345 | } |
| 346 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 347 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
| 348 | { |
| 349 | struct ib_uverbs_event_file *file = filp->private_data; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 350 | struct ib_uverbs_event *entry, *tmp; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 351 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 352 | spin_lock_irq(&file->lock); |
Roland Dreier | 1ae5c18 | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 353 | file->is_closed = 1; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 354 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
| 355 | if (entry->counter) |
| 356 | list_del(&entry->obj_list); |
| 357 | kfree(entry); |
| 358 | } |
| 359 | spin_unlock_irq(&file->lock); |
| 360 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 361 | if (file->is_async) { |
| 362 | ib_unregister_event_handler(&file->uverbs_file->event_handler); |
| 363 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); |
| 364 | } |
| 365 | kref_put(&file->ref, ib_uverbs_release_event_file); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 370 | static const struct file_operations uverbs_event_fops = { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 371 | .owner = THIS_MODULE, |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 372 | .read = ib_uverbs_event_read, |
| 373 | .poll = ib_uverbs_event_poll, |
Gleb Natapov | abdf119 | 2005-07-27 14:40:00 -0700 | [diff] [blame] | 374 | .release = ib_uverbs_event_close, |
| 375 | .fasync = ib_uverbs_event_fasync |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 376 | }; |
| 377 | |
| 378 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) |
| 379 | { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 380 | struct ib_uverbs_event_file *file = cq_context; |
| 381 | struct ib_ucq_object *uobj; |
| 382 | struct ib_uverbs_event *entry; |
| 383 | unsigned long flags; |
| 384 | |
| 385 | if (!file) |
| 386 | return; |
| 387 | |
| 388 | spin_lock_irqsave(&file->lock, flags); |
Roland Dreier | 1ae5c18 | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 389 | if (file->is_closed) { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 390 | spin_unlock_irqrestore(&file->lock, flags); |
| 391 | return; |
| 392 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 393 | |
| 394 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 395 | if (!entry) { |
| 396 | spin_unlock_irqrestore(&file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 397 | return; |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 398 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 399 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 400 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
| 401 | |
| 402 | entry->desc.comp.cq_handle = cq->uobject->user_handle; |
| 403 | entry->counter = &uobj->comp_events_reported; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 404 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 405 | list_add_tail(&entry->list, &file->event_list); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 406 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 407 | spin_unlock_irqrestore(&file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 408 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 409 | wake_up_interruptible(&file->poll_wait); |
| 410 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 414 | __u64 element, __u64 event, |
| 415 | struct list_head *obj_list, |
| 416 | u32 *counter) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 417 | { |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 418 | struct ib_uverbs_event *entry; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 419 | unsigned long flags; |
| 420 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 421 | spin_lock_irqsave(&file->async_file->lock, flags); |
Jack Morgenstein | fb77bce | 2008-06-18 15:36:38 -0700 | [diff] [blame] | 422 | if (file->async_file->is_closed) { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 423 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
| 424 | return; |
| 425 | } |
| 426 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 427 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 428 | if (!entry) { |
| 429 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 430 | return; |
Roland Dreier | 305a7e8 | 2005-10-11 15:39:38 -0700 | [diff] [blame] | 431 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 432 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 433 | entry->desc.async.element = element; |
| 434 | entry->desc.async.event_type = event; |
| 435 | entry->counter = counter; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 436 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 437 | list_add_tail(&entry->list, &file->async_file->event_list); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 438 | if (obj_list) |
| 439 | list_add_tail(&entry->obj_list, obj_list); |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 440 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 441 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 442 | wake_up_interruptible(&file->async_file->poll_wait); |
| 443 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) |
| 447 | { |
Roland Dreier | 7162a3e | 2005-10-30 09:50:04 -0800 | [diff] [blame] | 448 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
| 449 | struct ib_ucq_object, uobject); |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 450 | |
Roland Dreier | 7162a3e | 2005-10-30 09:50:04 -0800 | [diff] [blame] | 451 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 452 | event->event, &uobj->async_list, |
| 453 | &uobj->async_events_reported); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) |
| 457 | { |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 458 | struct ib_uevent_object *uobj; |
| 459 | |
| 460 | uobj = container_of(event->element.qp->uobject, |
| 461 | struct ib_uevent_object, uobject); |
| 462 | |
| 463 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, |
| 464 | event->event, &uobj->event_list, |
| 465 | &uobj->events_reported); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 466 | } |
| 467 | |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 468 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
| 469 | { |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 470 | struct ib_uevent_object *uobj; |
| 471 | |
| 472 | uobj = container_of(event->element.srq->uobject, |
| 473 | struct ib_uevent_object, uobject); |
| 474 | |
| 475 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, |
| 476 | event->event, &uobj->event_list, |
| 477 | &uobj->events_reported); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 478 | } |
| 479 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 480 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
| 481 | struct ib_event *event) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 482 | { |
| 483 | struct ib_uverbs_file *file = |
| 484 | container_of(handler, struct ib_uverbs_file, event_handler); |
| 485 | |
Roland Dreier | 63aaf64 | 2005-09-09 15:55:08 -0700 | [diff] [blame] | 486 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
| 487 | NULL, NULL); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 488 | } |
| 489 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 490 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
| 491 | int is_async, int *fd) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 492 | { |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 493 | struct ib_uverbs_event_file *ev_file; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 494 | struct file *filp; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 495 | int ret; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 496 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 497 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
| 498 | if (!ev_file) |
| 499 | return ERR_PTR(-ENOMEM); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 500 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 501 | kref_init(&ev_file->ref); |
| 502 | spin_lock_init(&ev_file->lock); |
| 503 | INIT_LIST_HEAD(&ev_file->event_list); |
| 504 | init_waitqueue_head(&ev_file->poll_wait); |
| 505 | ev_file->uverbs_file = uverbs_file; |
| 506 | ev_file->async_queue = NULL; |
| 507 | ev_file->is_async = is_async; |
Roland Dreier | 1ae5c18 | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 508 | ev_file->is_closed = 0; |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 509 | |
| 510 | *fd = get_unused_fd(); |
| 511 | if (*fd < 0) { |
| 512 | ret = *fd; |
| 513 | goto err; |
| 514 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 515 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 516 | /* |
| 517 | * fops_get() can't fail here, because we're coming from a |
| 518 | * system call on a uverbs file, which will already have a |
| 519 | * module reference. |
| 520 | */ |
Roland Dreier | a7dab9e | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 521 | filp = alloc_file(uverbs_event_mnt, dget(uverbs_event_mnt->mnt_root), |
| 522 | FMODE_READ, fops_get(&uverbs_event_fops)); |
| 523 | if (!filp) { |
| 524 | ret = -ENFILE; |
| 525 | goto err_fd; |
| 526 | } |
| 527 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 528 | filp->private_data = ev_file; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 529 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 530 | return filp; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 531 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 532 | err_fd: |
| 533 | put_unused_fd(*fd); |
| 534 | |
| 535 | err: |
| 536 | kfree(ev_file); |
| 537 | return ERR_PTR(ret); |
| 538 | } |
| 539 | |
| 540 | /* |
| 541 | * Look up a completion event file by FD. If lookup is successful, |
| 542 | * takes a ref to the event file struct that it returns; if |
| 543 | * unsuccessful, returns NULL. |
| 544 | */ |
| 545 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) |
| 546 | { |
| 547 | struct ib_uverbs_event_file *ev_file = NULL; |
| 548 | struct file *filp; |
| 549 | |
| 550 | filp = fget(fd); |
| 551 | if (!filp) |
| 552 | return NULL; |
| 553 | |
| 554 | if (filp->f_op != &uverbs_event_fops) |
| 555 | goto out; |
| 556 | |
| 557 | ev_file = filp->private_data; |
| 558 | if (ev_file->is_async) { |
| 559 | ev_file = NULL; |
| 560 | goto out; |
| 561 | } |
| 562 | |
| 563 | kref_get(&ev_file->ref); |
| 564 | |
| 565 | out: |
| 566 | fput(filp); |
| 567 | return ev_file; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, |
| 571 | size_t count, loff_t *pos) |
| 572 | { |
| 573 | struct ib_uverbs_file *file = filp->private_data; |
| 574 | struct ib_uverbs_cmd_hdr hdr; |
| 575 | |
| 576 | if (count < sizeof hdr) |
| 577 | return -EINVAL; |
| 578 | |
| 579 | if (copy_from_user(&hdr, buf, sizeof hdr)) |
| 580 | return -EFAULT; |
| 581 | |
| 582 | if (hdr.in_words * 4 != count) |
| 583 | return -EINVAL; |
| 584 | |
Roland Dreier | 63c47c2 | 2005-09-26 13:01:03 -0700 | [diff] [blame] | 585 | if (hdr.command < 0 || |
| 586 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || |
Roland Dreier | 883a99c | 2005-10-14 14:00:58 -0700 | [diff] [blame] | 587 | !uverbs_cmd_table[hdr.command] || |
| 588 | !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 589 | return -EINVAL; |
| 590 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 591 | if (!file->ucontext && |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 592 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
| 593 | return -EINVAL; |
| 594 | |
| 595 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, |
| 596 | hdr.in_words * 4, hdr.out_words * 4); |
| 597 | } |
| 598 | |
| 599 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) |
| 600 | { |
| 601 | struct ib_uverbs_file *file = filp->private_data; |
| 602 | |
| 603 | if (!file->ucontext) |
| 604 | return -ENODEV; |
| 605 | else |
| 606 | return file->device->ib_dev->mmap(file->ucontext, vma); |
| 607 | } |
| 608 | |
Roland Dreier | 5b2d281 | 2008-06-27 14:43:20 -0700 | [diff] [blame] | 609 | /* |
| 610 | * ib_uverbs_open() does not need the BKL: |
| 611 | * |
| 612 | * - dev_table[] accesses are protected by map_lock, the |
| 613 | * ib_uverbs_device structures are properly reference counted, and |
| 614 | * everything else is purely local to the file being created, so |
| 615 | * races against other open calls are not a problem; |
| 616 | * - there is no ioctl method to race against; |
| 617 | * - the device is added to dev_table[] as the last part of module |
| 618 | * initialization, the open method will either immediately run |
| 619 | * -ENXIO, or all required initialization will be done. |
| 620 | */ |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 621 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
| 622 | { |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 623 | struct ib_uverbs_device *dev; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 624 | struct ib_uverbs_file *file; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 625 | int ret; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 626 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 627 | spin_lock(&map_lock); |
| 628 | dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR]; |
| 629 | if (dev) |
| 630 | kref_get(&dev->ref); |
| 631 | spin_unlock(&map_lock); |
| 632 | |
Roland Dreier | 5b2d281 | 2008-06-27 14:43:20 -0700 | [diff] [blame] | 633 | if (!dev) |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 634 | return -ENXIO; |
| 635 | |
| 636 | if (!try_module_get(dev->ib_dev->owner)) { |
| 637 | ret = -ENODEV; |
| 638 | goto err; |
| 639 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 640 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 641 | file = kmalloc(sizeof *file, GFP_KERNEL); |
Roland Dreier | 63c47c2 | 2005-09-26 13:01:03 -0700 | [diff] [blame] | 642 | if (!file) { |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 643 | ret = -ENOMEM; |
| 644 | goto err_module; |
Roland Dreier | 63c47c2 | 2005-09-26 13:01:03 -0700 | [diff] [blame] | 645 | } |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 646 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 647 | file->device = dev; |
| 648 | file->ucontext = NULL; |
| 649 | file->async_file = NULL; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 650 | kref_init(&file->ref); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 651 | mutex_init(&file->mutex); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 652 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 653 | filp->private_data = file; |
| 654 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 655 | return 0; |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 656 | |
| 657 | err_module: |
| 658 | module_put(dev->ib_dev->owner); |
| 659 | |
| 660 | err: |
| 661 | kref_put(&dev->ref, ib_uverbs_release_dev); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 662 | return ret; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | static int ib_uverbs_close(struct inode *inode, struct file *filp) |
| 666 | { |
| 667 | struct ib_uverbs_file *file = filp->private_data; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 668 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 669 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 670 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 671 | if (file->async_file) |
| 672 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); |
| 673 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 674 | kref_put(&file->ref, ib_uverbs_release_file); |
| 675 | |
| 676 | return 0; |
| 677 | } |
| 678 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 679 | static const struct file_operations uverbs_fops = { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 680 | .owner = THIS_MODULE, |
| 681 | .write = ib_uverbs_write, |
| 682 | .open = ib_uverbs_open, |
| 683 | .release = ib_uverbs_close |
| 684 | }; |
| 685 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 686 | static const struct file_operations uverbs_mmap_fops = { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 687 | .owner = THIS_MODULE, |
| 688 | .write = ib_uverbs_write, |
| 689 | .mmap = ib_uverbs_mmap, |
| 690 | .open = ib_uverbs_open, |
| 691 | .release = ib_uverbs_close |
| 692 | }; |
| 693 | |
| 694 | static struct ib_client uverbs_client = { |
| 695 | .name = "uverbs", |
| 696 | .add = ib_uverbs_add_one, |
| 697 | .remove = ib_uverbs_remove_one |
| 698 | }; |
| 699 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 700 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
| 701 | char *buf) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 702 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 703 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 704 | |
| 705 | if (!dev) |
| 706 | return -ENODEV; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 707 | |
| 708 | return sprintf(buf, "%s\n", dev->ib_dev->name); |
| 709 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 710 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 711 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 712 | static ssize_t show_dev_abi_version(struct device *device, |
| 713 | struct device_attribute *attr, char *buf) |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 714 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 715 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 716 | |
| 717 | if (!dev) |
| 718 | return -ENODEV; |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 719 | |
| 720 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); |
| 721 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 722 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 723 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 724 | static ssize_t show_abi_version(struct class *class, char *buf) |
| 725 | { |
| 726 | return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION); |
| 727 | } |
| 728 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); |
| 729 | |
| 730 | static void ib_uverbs_add_one(struct ib_device *device) |
| 731 | { |
| 732 | struct ib_uverbs_device *uverbs_dev; |
| 733 | |
| 734 | if (!device->alloc_ucontext) |
| 735 | return; |
| 736 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 737 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 738 | if (!uverbs_dev) |
| 739 | return; |
| 740 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 741 | kref_init(&uverbs_dev->ref); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 742 | init_completion(&uverbs_dev->comp); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 743 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 744 | spin_lock(&map_lock); |
| 745 | uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
| 746 | if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) { |
| 747 | spin_unlock(&map_lock); |
| 748 | goto err; |
| 749 | } |
| 750 | set_bit(uverbs_dev->devnum, dev_map); |
| 751 | spin_unlock(&map_lock); |
| 752 | |
Roland Dreier | 6b73597 | 2005-09-26 13:53:25 -0700 | [diff] [blame] | 753 | uverbs_dev->ib_dev = device; |
Michael S. Tsirkin | f4fd0b2 | 2007-05-03 13:48:47 +0300 | [diff] [blame] | 754 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 755 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 756 | uverbs_dev->cdev = cdev_alloc(); |
| 757 | if (!uverbs_dev->cdev) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 758 | goto err; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 759 | uverbs_dev->cdev->owner = THIS_MODULE; |
| 760 | uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; |
| 761 | kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum); |
| 762 | if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1)) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 763 | goto err_cdev; |
| 764 | |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 765 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
| 766 | uverbs_dev->cdev->dev, uverbs_dev, |
| 767 | "uverbs%d", uverbs_dev->devnum); |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 768 | if (IS_ERR(uverbs_dev->dev)) |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 769 | goto err_cdev; |
| 770 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 771 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 772 | goto err_class; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 773 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
Roland Dreier | 274c089 | 2005-09-29 14:17:48 -0700 | [diff] [blame] | 774 | goto err_class; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 775 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 776 | spin_lock(&map_lock); |
| 777 | dev_table[uverbs_dev->devnum] = uverbs_dev; |
| 778 | spin_unlock(&map_lock); |
| 779 | |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 780 | ib_set_client_data(device, &uverbs_client, uverbs_dev); |
| 781 | |
| 782 | return; |
| 783 | |
| 784 | err_class: |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 785 | device_destroy(uverbs_class, uverbs_dev->cdev->dev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 786 | |
| 787 | err_cdev: |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 788 | cdev_del(uverbs_dev->cdev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 789 | clear_bit(uverbs_dev->devnum, dev_map); |
| 790 | |
| 791 | err: |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 792 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 793 | wait_for_completion(&uverbs_dev->comp); |
| 794 | kfree(uverbs_dev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 795 | return; |
| 796 | } |
| 797 | |
| 798 | static void ib_uverbs_remove_one(struct ib_device *device) |
| 799 | { |
| 800 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); |
| 801 | |
| 802 | if (!uverbs_dev) |
| 803 | return; |
| 804 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 805 | dev_set_drvdata(uverbs_dev->dev, NULL); |
| 806 | device_destroy(uverbs_class, uverbs_dev->cdev->dev); |
| 807 | cdev_del(uverbs_dev->cdev); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 808 | |
| 809 | spin_lock(&map_lock); |
| 810 | dev_table[uverbs_dev->devnum] = NULL; |
| 811 | spin_unlock(&map_lock); |
| 812 | |
| 813 | clear_bit(uverbs_dev->devnum, dev_map); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 814 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 815 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
Jack Morgenstein | fd60ae4 | 2006-08-03 10:56:42 -0700 | [diff] [blame] | 816 | wait_for_completion(&uverbs_dev->comp); |
| 817 | kfree(uverbs_dev); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 818 | } |
| 819 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 820 | static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags, |
| 821 | const char *dev_name, void *data, |
| 822 | struct vfsmount *mnt) |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 823 | { |
| 824 | return get_sb_pseudo(fs_type, "infinibandevent:", NULL, |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 825 | INFINIBANDEVENTFS_MAGIC, mnt); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | static struct file_system_type uverbs_event_fs = { |
| 829 | /* No owner field so module can be unloaded */ |
| 830 | .name = "infinibandeventfs", |
| 831 | .get_sb = uverbs_event_get_sb, |
| 832 | .kill_sb = kill_litter_super |
| 833 | }; |
| 834 | |
| 835 | static int __init ib_uverbs_init(void) |
| 836 | { |
| 837 | int ret; |
| 838 | |
| 839 | spin_lock_init(&map_lock); |
| 840 | |
| 841 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
| 842 | "infiniband_verbs"); |
| 843 | if (ret) { |
| 844 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); |
| 845 | goto out; |
| 846 | } |
| 847 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 848 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
| 849 | if (IS_ERR(uverbs_class)) { |
| 850 | ret = PTR_ERR(uverbs_class); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 851 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
| 852 | goto out_chrdev; |
| 853 | } |
| 854 | |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 855 | ret = class_create_file(uverbs_class, &class_attr_abi_version); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 856 | if (ret) { |
| 857 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); |
| 858 | goto out_class; |
| 859 | } |
| 860 | |
| 861 | ret = register_filesystem(&uverbs_event_fs); |
| 862 | if (ret) { |
| 863 | printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n"); |
| 864 | goto out_class; |
| 865 | } |
| 866 | |
| 867 | uverbs_event_mnt = kern_mount(&uverbs_event_fs); |
| 868 | if (IS_ERR(uverbs_event_mnt)) { |
| 869 | ret = PTR_ERR(uverbs_event_mnt); |
| 870 | printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n"); |
| 871 | goto out_fs; |
| 872 | } |
| 873 | |
| 874 | ret = ib_register_client(&uverbs_client); |
| 875 | if (ret) { |
| 876 | printk(KERN_ERR "user_verbs: couldn't register client\n"); |
| 877 | goto out_mnt; |
| 878 | } |
| 879 | |
| 880 | return 0; |
| 881 | |
| 882 | out_mnt: |
| 883 | mntput(uverbs_event_mnt); |
| 884 | |
| 885 | out_fs: |
| 886 | unregister_filesystem(&uverbs_event_fs); |
| 887 | |
| 888 | out_class: |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 889 | class_destroy(uverbs_class); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 890 | |
| 891 | out_chrdev: |
| 892 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
| 893 | |
| 894 | out: |
| 895 | return ret; |
| 896 | } |
| 897 | |
| 898 | static void __exit ib_uverbs_cleanup(void) |
| 899 | { |
| 900 | ib_unregister_client(&uverbs_client); |
| 901 | mntput(uverbs_event_mnt); |
| 902 | unregister_filesystem(&uverbs_event_fs); |
Roland Dreier | 70a30e1 | 2005-10-28 15:38:26 -0700 | [diff] [blame] | 903 | class_destroy(uverbs_class); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 904 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 905 | idr_destroy(&ib_uverbs_pd_idr); |
| 906 | idr_destroy(&ib_uverbs_mr_idr); |
| 907 | idr_destroy(&ib_uverbs_mw_idr); |
| 908 | idr_destroy(&ib_uverbs_ah_idr); |
| 909 | idr_destroy(&ib_uverbs_cq_idr); |
| 910 | idr_destroy(&ib_uverbs_qp_idr); |
| 911 | idr_destroy(&ib_uverbs_srq_idr); |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | module_init(ib_uverbs_init); |
| 915 | module_exit(ib_uverbs_cleanup); |