Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Voltaire, Inc. All rights reserved. |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 4 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the |
| 10 | * OpenIB.org BSD license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or |
| 13 | * without modification, are permitted provided that the following |
| 14 | * conditions are met: |
| 15 | * |
| 16 | * - Redistributions of source code must retain the above |
| 17 | * copyright notice, this list of conditions and the following |
| 18 | * disclaimer. |
| 19 | * |
| 20 | * - Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials |
| 23 | * provided with the distribution. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 32 | * SOFTWARE. |
| 33 | * |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 34 | * $Id: user_mad.c 2814 2005-07-06 19:14:09Z halr $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -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/cdev.h> |
| 43 | #include <linux/pci.h> |
| 44 | #include <linux/dma-mapping.h> |
| 45 | #include <linux/poll.h> |
| 46 | #include <linux/rwsem.h> |
| 47 | #include <linux/kref.h> |
| 48 | |
| 49 | #include <asm/uaccess.h> |
| 50 | #include <asm/semaphore.h> |
| 51 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame^] | 52 | #include <rdma/ib_mad.h> |
| 53 | #include <rdma/ib_user_mad.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | MODULE_AUTHOR("Roland Dreier"); |
| 56 | MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); |
| 57 | MODULE_LICENSE("Dual BSD/GPL"); |
| 58 | |
| 59 | enum { |
| 60 | IB_UMAD_MAX_PORTS = 64, |
| 61 | IB_UMAD_MAX_AGENTS = 32, |
| 62 | |
| 63 | IB_UMAD_MAJOR = 231, |
| 64 | IB_UMAD_MINOR_BASE = 0 |
| 65 | }; |
| 66 | |
| 67 | struct ib_umad_port { |
| 68 | int devnum; |
| 69 | struct cdev dev; |
| 70 | struct class_device class_dev; |
| 71 | |
| 72 | int sm_devnum; |
| 73 | struct cdev sm_dev; |
| 74 | struct class_device sm_class_dev; |
| 75 | struct semaphore sm_sem; |
| 76 | |
| 77 | struct ib_device *ib_dev; |
| 78 | struct ib_umad_device *umad_dev; |
| 79 | u8 port_num; |
| 80 | }; |
| 81 | |
| 82 | struct ib_umad_device { |
| 83 | int start_port, end_port; |
| 84 | struct kref ref; |
| 85 | struct ib_umad_port port[0]; |
| 86 | }; |
| 87 | |
| 88 | struct ib_umad_file { |
| 89 | struct ib_umad_port *port; |
| 90 | spinlock_t recv_lock; |
| 91 | struct list_head recv_list; |
| 92 | wait_queue_head_t recv_wait; |
| 93 | struct rw_semaphore agent_mutex; |
| 94 | struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; |
| 95 | struct ib_mr *mr[IB_UMAD_MAX_AGENTS]; |
| 96 | }; |
| 97 | |
| 98 | struct ib_umad_packet { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | struct ib_ah *ah; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 100 | struct ib_mad_send_buf *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | struct list_head list; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 102 | int length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | DECLARE_PCI_UNMAP_ADDR(mapping) |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 104 | struct ib_user_mad mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | }; |
| 106 | |
| 107 | static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); |
| 108 | static spinlock_t map_lock; |
| 109 | static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS * 2); |
| 110 | |
| 111 | static void ib_umad_add_one(struct ib_device *device); |
| 112 | static void ib_umad_remove_one(struct ib_device *device); |
| 113 | |
| 114 | static int queue_packet(struct ib_umad_file *file, |
| 115 | struct ib_mad_agent *agent, |
| 116 | struct ib_umad_packet *packet) |
| 117 | { |
| 118 | int ret = 1; |
| 119 | |
| 120 | down_read(&file->agent_mutex); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 121 | for (packet->mad.hdr.id = 0; |
| 122 | packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; |
| 123 | packet->mad.hdr.id++) |
| 124 | if (agent == file->agent[packet->mad.hdr.id]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | spin_lock_irq(&file->recv_lock); |
| 126 | list_add_tail(&packet->list, &file->recv_list); |
| 127 | spin_unlock_irq(&file->recv_lock); |
| 128 | wake_up_interruptible(&file->recv_wait); |
| 129 | ret = 0; |
| 130 | break; |
| 131 | } |
| 132 | |
| 133 | up_read(&file->agent_mutex); |
| 134 | |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | static void send_handler(struct ib_mad_agent *agent, |
| 139 | struct ib_mad_send_wc *send_wc) |
| 140 | { |
| 141 | struct ib_umad_file *file = agent->context; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 142 | struct ib_umad_packet *timeout, *packet = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | (void *) (unsigned long) send_wc->wr_id; |
| 144 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 145 | ib_destroy_ah(packet->msg->send_wr.wr.ud.ah); |
| 146 | ib_free_send_mad(packet->msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 149 | timeout = kmalloc(sizeof *timeout + sizeof (struct ib_mad_hdr), |
| 150 | GFP_KERNEL); |
| 151 | if (!timeout) |
| 152 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 154 | memset(timeout, 0, sizeof *timeout + sizeof (struct ib_mad_hdr)); |
| 155 | |
| 156 | timeout->length = sizeof (struct ib_mad_hdr); |
| 157 | timeout->mad.hdr.id = packet->mad.hdr.id; |
| 158 | timeout->mad.hdr.status = ETIMEDOUT; |
| 159 | memcpy(timeout->mad.data, packet->mad.data, |
| 160 | sizeof (struct ib_mad_hdr)); |
| 161 | |
| 162 | if (!queue_packet(file, agent, timeout)) |
| 163 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 165 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | kfree(packet); |
| 167 | } |
| 168 | |
| 169 | static void recv_handler(struct ib_mad_agent *agent, |
| 170 | struct ib_mad_recv_wc *mad_recv_wc) |
| 171 | { |
| 172 | struct ib_umad_file *file = agent->context; |
| 173 | struct ib_umad_packet *packet; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 174 | int length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | if (mad_recv_wc->wc->status != IB_WC_SUCCESS) |
| 177 | goto out; |
| 178 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 179 | length = mad_recv_wc->mad_len; |
| 180 | packet = kmalloc(sizeof *packet + length, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | if (!packet) |
| 182 | goto out; |
| 183 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 184 | memset(packet, 0, sizeof *packet + length); |
| 185 | packet->length = length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 187 | ib_coalesce_recv_mad(mad_recv_wc, packet->mad.data); |
| 188 | |
| 189 | packet->mad.hdr.status = 0; |
| 190 | packet->mad.hdr.length = length + sizeof (struct ib_user_mad); |
| 191 | packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); |
| 192 | packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); |
| 193 | packet->mad.hdr.sl = mad_recv_wc->wc->sl; |
| 194 | packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; |
| 195 | packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); |
| 196 | if (packet->mad.hdr.grh_present) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | /* XXX parse GRH */ |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 198 | packet->mad.hdr.gid_index = 0; |
| 199 | packet->mad.hdr.hop_limit = 0; |
| 200 | packet->mad.hdr.traffic_class = 0; |
| 201 | memset(packet->mad.hdr.gid, 0, 16); |
| 202 | packet->mad.hdr.flow_label = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | if (queue_packet(file, agent, packet)) |
| 206 | kfree(packet); |
| 207 | |
| 208 | out: |
| 209 | ib_free_recv_mad(mad_recv_wc); |
| 210 | } |
| 211 | |
| 212 | static ssize_t ib_umad_read(struct file *filp, char __user *buf, |
| 213 | size_t count, loff_t *pos) |
| 214 | { |
| 215 | struct ib_umad_file *file = filp->private_data; |
| 216 | struct ib_umad_packet *packet; |
| 217 | ssize_t ret; |
| 218 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 219 | if (count < sizeof (struct ib_user_mad) + sizeof (struct ib_mad)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return -EINVAL; |
| 221 | |
| 222 | spin_lock_irq(&file->recv_lock); |
| 223 | |
| 224 | while (list_empty(&file->recv_list)) { |
| 225 | spin_unlock_irq(&file->recv_lock); |
| 226 | |
| 227 | if (filp->f_flags & O_NONBLOCK) |
| 228 | return -EAGAIN; |
| 229 | |
| 230 | if (wait_event_interruptible(file->recv_wait, |
| 231 | !list_empty(&file->recv_list))) |
| 232 | return -ERESTARTSYS; |
| 233 | |
| 234 | spin_lock_irq(&file->recv_lock); |
| 235 | } |
| 236 | |
| 237 | packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); |
| 238 | list_del(&packet->list); |
| 239 | |
| 240 | spin_unlock_irq(&file->recv_lock); |
| 241 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 242 | if (count < packet->length + sizeof (struct ib_user_mad)) { |
| 243 | /* Return length needed (and first RMPP segment) if too small */ |
| 244 | if (copy_to_user(buf, &packet->mad, |
| 245 | sizeof (struct ib_user_mad) + sizeof (struct ib_mad))) |
| 246 | ret = -EFAULT; |
| 247 | else |
| 248 | ret = -ENOSPC; |
| 249 | } else if (copy_to_user(buf, &packet->mad, |
| 250 | packet->length + sizeof (struct ib_user_mad))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | ret = -EFAULT; |
| 252 | else |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 253 | ret = packet->length + sizeof (struct ib_user_mad); |
| 254 | if (ret < 0) { |
| 255 | /* Requeue packet */ |
| 256 | spin_lock_irq(&file->recv_lock); |
| 257 | list_add(&packet->list, &file->recv_list); |
| 258 | spin_unlock_irq(&file->recv_lock); |
| 259 | } else |
| 260 | kfree(packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | return ret; |
| 262 | } |
| 263 | |
| 264 | static ssize_t ib_umad_write(struct file *filp, const char __user *buf, |
| 265 | size_t count, loff_t *pos) |
| 266 | { |
| 267 | struct ib_umad_file *file = filp->private_data; |
| 268 | struct ib_umad_packet *packet; |
| 269 | struct ib_mad_agent *agent; |
| 270 | struct ib_ah_attr ah_attr; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 271 | struct ib_send_wr *bad_wr; |
| 272 | struct ib_rmpp_mad *rmpp_mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | u8 method; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 274 | __be64 *tid; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 275 | int ret, length, hdr_len, data_len, rmpp_hdr_size; |
| 276 | int rmpp_active = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | if (count < sizeof (struct ib_user_mad)) |
| 279 | return -EINVAL; |
| 280 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 281 | length = count - sizeof (struct ib_user_mad); |
| 282 | packet = kmalloc(sizeof *packet + sizeof(struct ib_mad_hdr) + |
| 283 | sizeof(struct ib_rmpp_hdr), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | if (!packet) |
| 285 | return -ENOMEM; |
| 286 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 287 | if (copy_from_user(&packet->mad, buf, |
| 288 | sizeof (struct ib_user_mad) + |
| 289 | sizeof(struct ib_mad_hdr) + |
| 290 | sizeof(struct ib_rmpp_hdr))) { |
| 291 | ret = -EFAULT; |
| 292 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
| 294 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 295 | if (packet->mad.hdr.id < 0 || |
| 296 | packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | ret = -EINVAL; |
| 298 | goto err; |
| 299 | } |
| 300 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 301 | packet->length = length; |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | down_read(&file->agent_mutex); |
| 304 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 305 | agent = file->agent[packet->mad.hdr.id]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | if (!agent) { |
| 307 | ret = -EINVAL; |
| 308 | goto err_up; |
| 309 | } |
| 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | memset(&ah_attr, 0, sizeof ah_attr); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 312 | ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid); |
| 313 | ah_attr.sl = packet->mad.hdr.sl; |
| 314 | ah_attr.src_path_bits = packet->mad.hdr.path_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | ah_attr.port_num = file->port->port_num; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 316 | if (packet->mad.hdr.grh_present) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | ah_attr.ah_flags = IB_AH_GRH; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 318 | memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16); |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 319 | ah_attr.grh.flow_label = be32_to_cpu(packet->mad.hdr.flow_label); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 320 | ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit; |
| 321 | ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | packet->ah = ib_create_ah(agent->qp->pd, &ah_attr); |
| 325 | if (IS_ERR(packet->ah)) { |
| 326 | ret = PTR_ERR(packet->ah); |
| 327 | goto err_up; |
| 328 | } |
| 329 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 330 | rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; |
| 331 | if (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE) { |
| 332 | /* RMPP active */ |
| 333 | if (!agent->rmpp_version) { |
| 334 | ret = -EINVAL; |
| 335 | goto err_ah; |
| 336 | } |
| 337 | /* Validate that management class can support RMPP */ |
| 338 | if (rmpp_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_ADM) { |
| 339 | hdr_len = offsetof(struct ib_sa_mad, data); |
| 340 | data_len = length; |
| 341 | } else if ((rmpp_mad->mad_hdr.mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
| 342 | (rmpp_mad->mad_hdr.mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) { |
| 343 | hdr_len = offsetof(struct ib_vendor_mad, data); |
| 344 | data_len = length - hdr_len; |
| 345 | } else { |
| 346 | ret = -EINVAL; |
| 347 | goto err_ah; |
| 348 | } |
| 349 | rmpp_active = 1; |
| 350 | } else { |
| 351 | if (length > sizeof(struct ib_mad)) { |
| 352 | ret = -EINVAL; |
| 353 | goto err_ah; |
| 354 | } |
| 355 | hdr_len = offsetof(struct ib_mad, data); |
| 356 | data_len = length - hdr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 359 | packet->msg = ib_create_send_mad(agent, |
| 360 | be32_to_cpu(packet->mad.hdr.qpn), |
| 361 | 0, packet->ah, rmpp_active, |
| 362 | hdr_len, data_len, |
| 363 | GFP_KERNEL); |
| 364 | if (IS_ERR(packet->msg)) { |
| 365 | ret = PTR_ERR(packet->msg); |
| 366 | goto err_ah; |
| 367 | } |
| 368 | |
| 369 | packet->msg->send_wr.wr.ud.timeout_ms = packet->mad.hdr.timeout_ms; |
| 370 | packet->msg->send_wr.wr.ud.retries = packet->mad.hdr.retries; |
| 371 | |
| 372 | /* Override send WR WRID initialized in ib_create_send_mad */ |
| 373 | packet->msg->send_wr.wr_id = (unsigned long) packet; |
| 374 | |
| 375 | if (!rmpp_active) { |
| 376 | /* Copy message from user into send buffer */ |
| 377 | if (copy_from_user(packet->msg->mad, |
| 378 | buf + sizeof(struct ib_user_mad), length)) { |
| 379 | ret = -EFAULT; |
| 380 | goto err_msg; |
| 381 | } |
| 382 | } else { |
| 383 | rmpp_hdr_size = sizeof(struct ib_mad_hdr) + |
| 384 | sizeof(struct ib_rmpp_hdr); |
| 385 | |
| 386 | /* Only copy MAD headers (RMPP header in place) */ |
| 387 | memcpy(packet->msg->mad, packet->mad.data, |
| 388 | sizeof(struct ib_mad_hdr)); |
| 389 | |
| 390 | /* Now, copy rest of message from user into send buffer */ |
| 391 | if (copy_from_user(((struct ib_rmpp_mad *) packet->msg->mad)->data, |
| 392 | buf + sizeof (struct ib_user_mad) + rmpp_hdr_size, |
| 393 | length - rmpp_hdr_size)) { |
| 394 | ret = -EFAULT; |
| 395 | goto err_msg; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * If userspace is generating a request that will generate a |
| 401 | * response, we need to make sure the high-order part of the |
| 402 | * transaction ID matches the agent being used to send the |
| 403 | * MAD. |
| 404 | */ |
| 405 | method = packet->msg->mad->mad_hdr.method; |
| 406 | |
| 407 | if (!(method & IB_MGMT_METHOD_RESP) && |
| 408 | method != IB_MGMT_METHOD_TRAP_REPRESS && |
| 409 | method != IB_MGMT_METHOD_SEND) { |
| 410 | tid = &packet->msg->mad->mad_hdr.tid; |
| 411 | *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | |
| 412 | (be64_to_cpup(tid) & 0xffffffff)); |
| 413 | } |
| 414 | |
| 415 | ret = ib_post_send_mad(agent, &packet->msg->send_wr, &bad_wr); |
| 416 | if (ret) |
| 417 | goto err_msg; |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | up_read(&file->agent_mutex); |
| 420 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 421 | return sizeof (struct ib_user_mad_hdr) + packet->length; |
| 422 | |
| 423 | err_msg: |
| 424 | ib_free_send_mad(packet->msg); |
| 425 | |
| 426 | err_ah: |
| 427 | ib_destroy_ah(packet->ah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
| 429 | err_up: |
| 430 | up_read(&file->agent_mutex); |
| 431 | |
| 432 | err: |
| 433 | kfree(packet); |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) |
| 438 | { |
| 439 | struct ib_umad_file *file = filp->private_data; |
| 440 | |
| 441 | /* we will always be able to post a MAD send */ |
| 442 | unsigned int mask = POLLOUT | POLLWRNORM; |
| 443 | |
| 444 | poll_wait(filp, &file->recv_wait, wait); |
| 445 | |
| 446 | if (!list_empty(&file->recv_list)) |
| 447 | mask |= POLLIN | POLLRDNORM; |
| 448 | |
| 449 | return mask; |
| 450 | } |
| 451 | |
| 452 | static int ib_umad_reg_agent(struct ib_umad_file *file, unsigned long arg) |
| 453 | { |
| 454 | struct ib_user_mad_reg_req ureq; |
| 455 | struct ib_mad_reg_req req; |
| 456 | struct ib_mad_agent *agent; |
| 457 | int agent_id; |
| 458 | int ret; |
| 459 | |
| 460 | down_write(&file->agent_mutex); |
| 461 | |
| 462 | if (copy_from_user(&ureq, (void __user *) arg, sizeof ureq)) { |
| 463 | ret = -EFAULT; |
| 464 | goto out; |
| 465 | } |
| 466 | |
| 467 | if (ureq.qpn != 0 && ureq.qpn != 1) { |
| 468 | ret = -EINVAL; |
| 469 | goto out; |
| 470 | } |
| 471 | |
| 472 | for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) |
| 473 | if (!file->agent[agent_id]) |
| 474 | goto found; |
| 475 | |
| 476 | ret = -ENOMEM; |
| 477 | goto out; |
| 478 | |
| 479 | found: |
Roland Dreier | 0df3bb1 | 2005-04-16 15:26:11 -0700 | [diff] [blame] | 480 | if (ureq.mgmt_class) { |
| 481 | req.mgmt_class = ureq.mgmt_class; |
| 482 | req.mgmt_class_version = ureq.mgmt_class_version; |
| 483 | memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask); |
| 484 | memcpy(req.oui, ureq.oui, sizeof req.oui); |
| 485 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
| 487 | agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, |
| 488 | ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, |
Roland Dreier | 0df3bb1 | 2005-04-16 15:26:11 -0700 | [diff] [blame] | 489 | ureq.mgmt_class ? &req : NULL, |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 490 | ureq.rmpp_version, |
| 491 | send_handler, recv_handler, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | if (IS_ERR(agent)) { |
| 493 | ret = PTR_ERR(agent); |
| 494 | goto out; |
| 495 | } |
| 496 | |
| 497 | file->agent[agent_id] = agent; |
| 498 | |
| 499 | file->mr[agent_id] = ib_get_dma_mr(agent->qp->pd, IB_ACCESS_LOCAL_WRITE); |
| 500 | if (IS_ERR(file->mr[agent_id])) { |
| 501 | ret = -ENOMEM; |
| 502 | goto err; |
| 503 | } |
| 504 | |
| 505 | if (put_user(agent_id, |
| 506 | (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) { |
| 507 | ret = -EFAULT; |
| 508 | goto err_mr; |
| 509 | } |
| 510 | |
| 511 | ret = 0; |
| 512 | goto out; |
| 513 | |
| 514 | err_mr: |
| 515 | ib_dereg_mr(file->mr[agent_id]); |
| 516 | |
| 517 | err: |
| 518 | file->agent[agent_id] = NULL; |
| 519 | ib_unregister_mad_agent(agent); |
| 520 | |
| 521 | out: |
| 522 | up_write(&file->agent_mutex); |
| 523 | return ret; |
| 524 | } |
| 525 | |
| 526 | static int ib_umad_unreg_agent(struct ib_umad_file *file, unsigned long arg) |
| 527 | { |
| 528 | u32 id; |
| 529 | int ret = 0; |
| 530 | |
| 531 | down_write(&file->agent_mutex); |
| 532 | |
| 533 | if (get_user(id, (u32 __user *) arg)) { |
| 534 | ret = -EFAULT; |
| 535 | goto out; |
| 536 | } |
| 537 | |
| 538 | if (id < 0 || id >= IB_UMAD_MAX_AGENTS || !file->agent[id]) { |
| 539 | ret = -EINVAL; |
| 540 | goto out; |
| 541 | } |
| 542 | |
| 543 | ib_dereg_mr(file->mr[id]); |
| 544 | ib_unregister_mad_agent(file->agent[id]); |
| 545 | file->agent[id] = NULL; |
| 546 | |
| 547 | out: |
| 548 | up_write(&file->agent_mutex); |
| 549 | return ret; |
| 550 | } |
| 551 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 552 | static long ib_umad_ioctl(struct file *filp, unsigned int cmd, |
| 553 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | { |
| 555 | switch (cmd) { |
| 556 | case IB_USER_MAD_REGISTER_AGENT: |
| 557 | return ib_umad_reg_agent(filp->private_data, arg); |
| 558 | case IB_USER_MAD_UNREGISTER_AGENT: |
| 559 | return ib_umad_unreg_agent(filp->private_data, arg); |
| 560 | default: |
| 561 | return -ENOIOCTLCMD; |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | static int ib_umad_open(struct inode *inode, struct file *filp) |
| 566 | { |
| 567 | struct ib_umad_port *port = |
| 568 | container_of(inode->i_cdev, struct ib_umad_port, dev); |
| 569 | struct ib_umad_file *file; |
| 570 | |
| 571 | file = kmalloc(sizeof *file, GFP_KERNEL); |
| 572 | if (!file) |
| 573 | return -ENOMEM; |
| 574 | |
| 575 | memset(file, 0, sizeof *file); |
| 576 | |
| 577 | spin_lock_init(&file->recv_lock); |
| 578 | init_rwsem(&file->agent_mutex); |
| 579 | INIT_LIST_HEAD(&file->recv_list); |
| 580 | init_waitqueue_head(&file->recv_wait); |
| 581 | |
| 582 | file->port = port; |
| 583 | filp->private_data = file; |
| 584 | |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | static int ib_umad_close(struct inode *inode, struct file *filp) |
| 589 | { |
| 590 | struct ib_umad_file *file = filp->private_data; |
Roland Dreier | 561e148 | 2005-05-25 12:31:30 -0700 | [diff] [blame] | 591 | struct ib_umad_packet *packet, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | int i; |
| 593 | |
| 594 | for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) |
| 595 | if (file->agent[i]) { |
| 596 | ib_dereg_mr(file->mr[i]); |
| 597 | ib_unregister_mad_agent(file->agent[i]); |
| 598 | } |
| 599 | |
Roland Dreier | 561e148 | 2005-05-25 12:31:30 -0700 | [diff] [blame] | 600 | list_for_each_entry_safe(packet, tmp, &file->recv_list, list) |
| 601 | kfree(packet); |
| 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | kfree(file); |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | static struct file_operations umad_fops = { |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 609 | .owner = THIS_MODULE, |
| 610 | .read = ib_umad_read, |
| 611 | .write = ib_umad_write, |
| 612 | .poll = ib_umad_poll, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | .unlocked_ioctl = ib_umad_ioctl, |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 614 | .compat_ioctl = ib_umad_ioctl, |
| 615 | .open = ib_umad_open, |
| 616 | .release = ib_umad_close |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | }; |
| 618 | |
| 619 | static int ib_umad_sm_open(struct inode *inode, struct file *filp) |
| 620 | { |
| 621 | struct ib_umad_port *port = |
| 622 | container_of(inode->i_cdev, struct ib_umad_port, sm_dev); |
| 623 | struct ib_port_modify props = { |
| 624 | .set_port_cap_mask = IB_PORT_SM |
| 625 | }; |
| 626 | int ret; |
| 627 | |
| 628 | if (filp->f_flags & O_NONBLOCK) { |
| 629 | if (down_trylock(&port->sm_sem)) |
| 630 | return -EAGAIN; |
| 631 | } else { |
| 632 | if (down_interruptible(&port->sm_sem)) |
| 633 | return -ERESTARTSYS; |
| 634 | } |
| 635 | |
| 636 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); |
| 637 | if (ret) { |
| 638 | up(&port->sm_sem); |
| 639 | return ret; |
| 640 | } |
| 641 | |
| 642 | filp->private_data = port; |
| 643 | |
| 644 | return 0; |
| 645 | } |
| 646 | |
| 647 | static int ib_umad_sm_close(struct inode *inode, struct file *filp) |
| 648 | { |
| 649 | struct ib_umad_port *port = filp->private_data; |
| 650 | struct ib_port_modify props = { |
| 651 | .clr_port_cap_mask = IB_PORT_SM |
| 652 | }; |
| 653 | int ret; |
| 654 | |
| 655 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); |
| 656 | up(&port->sm_sem); |
| 657 | |
| 658 | return ret; |
| 659 | } |
| 660 | |
| 661 | static struct file_operations umad_sm_fops = { |
| 662 | .owner = THIS_MODULE, |
| 663 | .open = ib_umad_sm_open, |
| 664 | .release = ib_umad_sm_close |
| 665 | }; |
| 666 | |
| 667 | static struct ib_client umad_client = { |
| 668 | .name = "umad", |
| 669 | .add = ib_umad_add_one, |
| 670 | .remove = ib_umad_remove_one |
| 671 | }; |
| 672 | |
| 673 | static ssize_t show_dev(struct class_device *class_dev, char *buf) |
| 674 | { |
| 675 | struct ib_umad_port *port = class_get_devdata(class_dev); |
| 676 | |
| 677 | if (class_dev == &port->class_dev) |
| 678 | return print_dev_t(buf, port->dev.dev); |
| 679 | else |
| 680 | return print_dev_t(buf, port->sm_dev.dev); |
| 681 | } |
| 682 | static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL); |
| 683 | |
| 684 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) |
| 685 | { |
| 686 | struct ib_umad_port *port = class_get_devdata(class_dev); |
| 687 | |
| 688 | return sprintf(buf, "%s\n", port->ib_dev->name); |
| 689 | } |
| 690 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
| 691 | |
| 692 | static ssize_t show_port(struct class_device *class_dev, char *buf) |
| 693 | { |
| 694 | struct ib_umad_port *port = class_get_devdata(class_dev); |
| 695 | |
| 696 | return sprintf(buf, "%d\n", port->port_num); |
| 697 | } |
| 698 | static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
| 699 | |
| 700 | static void ib_umad_release_dev(struct kref *ref) |
| 701 | { |
| 702 | struct ib_umad_device *dev = |
| 703 | container_of(ref, struct ib_umad_device, ref); |
| 704 | |
| 705 | kfree(dev); |
| 706 | } |
| 707 | |
| 708 | static void ib_umad_release_port(struct class_device *class_dev) |
| 709 | { |
| 710 | struct ib_umad_port *port = class_get_devdata(class_dev); |
| 711 | |
| 712 | if (class_dev == &port->class_dev) { |
| 713 | cdev_del(&port->dev); |
| 714 | clear_bit(port->devnum, dev_map); |
| 715 | } else { |
| 716 | cdev_del(&port->sm_dev); |
| 717 | clear_bit(port->sm_devnum, dev_map); |
| 718 | } |
| 719 | |
| 720 | kref_put(&port->umad_dev->ref, ib_umad_release_dev); |
| 721 | } |
| 722 | |
| 723 | static struct class umad_class = { |
| 724 | .name = "infiniband_mad", |
| 725 | .release = ib_umad_release_port |
| 726 | }; |
| 727 | |
| 728 | static ssize_t show_abi_version(struct class *class, char *buf) |
| 729 | { |
| 730 | return sprintf(buf, "%d\n", IB_USER_MAD_ABI_VERSION); |
| 731 | } |
| 732 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); |
| 733 | |
| 734 | static int ib_umad_init_port(struct ib_device *device, int port_num, |
| 735 | struct ib_umad_port *port) |
| 736 | { |
| 737 | spin_lock(&map_lock); |
| 738 | port->devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); |
| 739 | if (port->devnum >= IB_UMAD_MAX_PORTS) { |
| 740 | spin_unlock(&map_lock); |
| 741 | return -1; |
| 742 | } |
| 743 | port->sm_devnum = find_next_zero_bit(dev_map, IB_UMAD_MAX_PORTS * 2, IB_UMAD_MAX_PORTS); |
| 744 | if (port->sm_devnum >= IB_UMAD_MAX_PORTS * 2) { |
| 745 | spin_unlock(&map_lock); |
| 746 | return -1; |
| 747 | } |
| 748 | set_bit(port->devnum, dev_map); |
| 749 | set_bit(port->sm_devnum, dev_map); |
| 750 | spin_unlock(&map_lock); |
| 751 | |
| 752 | port->ib_dev = device; |
| 753 | port->port_num = port_num; |
| 754 | init_MUTEX(&port->sm_sem); |
| 755 | |
| 756 | cdev_init(&port->dev, &umad_fops); |
| 757 | port->dev.owner = THIS_MODULE; |
| 758 | kobject_set_name(&port->dev.kobj, "umad%d", port->devnum); |
| 759 | if (cdev_add(&port->dev, base_dev + port->devnum, 1)) |
| 760 | return -1; |
| 761 | |
| 762 | port->class_dev.class = &umad_class; |
| 763 | port->class_dev.dev = device->dma_device; |
| 764 | |
| 765 | snprintf(port->class_dev.class_id, BUS_ID_SIZE, "umad%d", port->devnum); |
| 766 | |
| 767 | if (class_device_register(&port->class_dev)) |
| 768 | goto err_cdev; |
| 769 | |
| 770 | class_set_devdata(&port->class_dev, port); |
| 771 | kref_get(&port->umad_dev->ref); |
| 772 | |
| 773 | if (class_device_create_file(&port->class_dev, &class_device_attr_dev)) |
| 774 | goto err_class; |
| 775 | if (class_device_create_file(&port->class_dev, &class_device_attr_ibdev)) |
| 776 | goto err_class; |
| 777 | if (class_device_create_file(&port->class_dev, &class_device_attr_port)) |
| 778 | goto err_class; |
| 779 | |
| 780 | cdev_init(&port->sm_dev, &umad_sm_fops); |
| 781 | port->sm_dev.owner = THIS_MODULE; |
| 782 | kobject_set_name(&port->dev.kobj, "issm%d", port->sm_devnum - IB_UMAD_MAX_PORTS); |
| 783 | if (cdev_add(&port->sm_dev, base_dev + port->sm_devnum, 1)) |
| 784 | return -1; |
| 785 | |
| 786 | port->sm_class_dev.class = &umad_class; |
| 787 | port->sm_class_dev.dev = device->dma_device; |
| 788 | |
| 789 | snprintf(port->sm_class_dev.class_id, BUS_ID_SIZE, "issm%d", port->sm_devnum - IB_UMAD_MAX_PORTS); |
| 790 | |
| 791 | if (class_device_register(&port->sm_class_dev)) |
| 792 | goto err_sm_cdev; |
| 793 | |
| 794 | class_set_devdata(&port->sm_class_dev, port); |
| 795 | kref_get(&port->umad_dev->ref); |
| 796 | |
| 797 | if (class_device_create_file(&port->sm_class_dev, &class_device_attr_dev)) |
| 798 | goto err_sm_class; |
| 799 | if (class_device_create_file(&port->sm_class_dev, &class_device_attr_ibdev)) |
| 800 | goto err_sm_class; |
| 801 | if (class_device_create_file(&port->sm_class_dev, &class_device_attr_port)) |
| 802 | goto err_sm_class; |
| 803 | |
| 804 | return 0; |
| 805 | |
| 806 | err_sm_class: |
| 807 | class_device_unregister(&port->sm_class_dev); |
| 808 | |
| 809 | err_sm_cdev: |
| 810 | cdev_del(&port->sm_dev); |
| 811 | |
| 812 | err_class: |
| 813 | class_device_unregister(&port->class_dev); |
| 814 | |
| 815 | err_cdev: |
| 816 | cdev_del(&port->dev); |
| 817 | clear_bit(port->devnum, dev_map); |
| 818 | |
| 819 | return -1; |
| 820 | } |
| 821 | |
| 822 | static void ib_umad_add_one(struct ib_device *device) |
| 823 | { |
| 824 | struct ib_umad_device *umad_dev; |
| 825 | int s, e, i; |
| 826 | |
| 827 | if (device->node_type == IB_NODE_SWITCH) |
| 828 | s = e = 0; |
| 829 | else { |
| 830 | s = 1; |
| 831 | e = device->phys_port_cnt; |
| 832 | } |
| 833 | |
| 834 | umad_dev = kmalloc(sizeof *umad_dev + |
| 835 | (e - s + 1) * sizeof (struct ib_umad_port), |
| 836 | GFP_KERNEL); |
| 837 | if (!umad_dev) |
| 838 | return; |
| 839 | |
| 840 | memset(umad_dev, 0, sizeof *umad_dev + |
| 841 | (e - s + 1) * sizeof (struct ib_umad_port)); |
| 842 | |
| 843 | kref_init(&umad_dev->ref); |
| 844 | |
| 845 | umad_dev->start_port = s; |
| 846 | umad_dev->end_port = e; |
| 847 | |
| 848 | for (i = s; i <= e; ++i) { |
| 849 | umad_dev->port[i - s].umad_dev = umad_dev; |
| 850 | |
| 851 | if (ib_umad_init_port(device, i, &umad_dev->port[i - s])) |
| 852 | goto err; |
| 853 | } |
| 854 | |
| 855 | ib_set_client_data(device, &umad_client, umad_dev); |
| 856 | |
| 857 | return; |
| 858 | |
| 859 | err: |
| 860 | while (--i >= s) { |
| 861 | class_device_unregister(&umad_dev->port[i - s].class_dev); |
| 862 | class_device_unregister(&umad_dev->port[i - s].sm_class_dev); |
| 863 | } |
| 864 | |
| 865 | kref_put(&umad_dev->ref, ib_umad_release_dev); |
| 866 | } |
| 867 | |
| 868 | static void ib_umad_remove_one(struct ib_device *device) |
| 869 | { |
| 870 | struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client); |
| 871 | int i; |
| 872 | |
| 873 | if (!umad_dev) |
| 874 | return; |
| 875 | |
| 876 | for (i = 0; i <= umad_dev->end_port - umad_dev->start_port; ++i) { |
| 877 | class_device_unregister(&umad_dev->port[i].class_dev); |
| 878 | class_device_unregister(&umad_dev->port[i].sm_class_dev); |
| 879 | } |
| 880 | |
| 881 | kref_put(&umad_dev->ref, ib_umad_release_dev); |
| 882 | } |
| 883 | |
| 884 | static int __init ib_umad_init(void) |
| 885 | { |
| 886 | int ret; |
| 887 | |
| 888 | spin_lock_init(&map_lock); |
| 889 | |
| 890 | ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, |
| 891 | "infiniband_mad"); |
| 892 | if (ret) { |
| 893 | printk(KERN_ERR "user_mad: couldn't register device number\n"); |
| 894 | goto out; |
| 895 | } |
| 896 | |
| 897 | ret = class_register(&umad_class); |
| 898 | if (ret) { |
| 899 | printk(KERN_ERR "user_mad: couldn't create class infiniband_mad\n"); |
| 900 | goto out_chrdev; |
| 901 | } |
| 902 | |
| 903 | ret = class_create_file(&umad_class, &class_attr_abi_version); |
| 904 | if (ret) { |
| 905 | printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n"); |
| 906 | goto out_class; |
| 907 | } |
| 908 | |
| 909 | ret = ib_register_client(&umad_client); |
| 910 | if (ret) { |
| 911 | printk(KERN_ERR "user_mad: couldn't register ib_umad client\n"); |
| 912 | goto out_class; |
| 913 | } |
| 914 | |
| 915 | return 0; |
| 916 | |
| 917 | out_class: |
| 918 | class_unregister(&umad_class); |
| 919 | |
| 920 | out_chrdev: |
| 921 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); |
| 922 | |
| 923 | out: |
| 924 | return ret; |
| 925 | } |
| 926 | |
| 927 | static void __exit ib_umad_cleanup(void) |
| 928 | { |
| 929 | ib_unregister_client(&umad_client); |
| 930 | class_unregister(&umad_class); |
| 931 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); |
| 932 | } |
| 933 | |
| 934 | module_init(ib_umad_init); |
| 935 | module_exit(ib_umad_cleanup); |