Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -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. |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 5 | * Copyright (c) 2008 Cisco. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
| 16 | * |
| 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
| 20 | * |
| 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/device.h> |
| 39 | #include <linux/err.h> |
| 40 | #include <linux/fs.h> |
| 41 | #include <linux/cdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/dma-mapping.h> |
| 43 | #include <linux/poll.h> |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 44 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/kref.h> |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 46 | #include <linux/compat.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 47 | #include <linux/sched.h> |
Matthew Wilcox | 6188e10 | 2008-04-18 22:21:05 -0400 | [diff] [blame] | 48 | #include <linux/semaphore.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Roland Dreier | a4d61e8 | 2005-08-25 13:40:04 -0700 | [diff] [blame] | 53 | #include <rdma/ib_mad.h> |
| 54 | #include <rdma/ib_user_mad.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | MODULE_AUTHOR("Roland Dreier"); |
| 57 | MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); |
| 58 | MODULE_LICENSE("Dual BSD/GPL"); |
| 59 | |
| 60 | enum { |
| 61 | IB_UMAD_MAX_PORTS = 64, |
| 62 | IB_UMAD_MAX_AGENTS = 32, |
| 63 | |
| 64 | IB_UMAD_MAJOR = 231, |
| 65 | IB_UMAD_MINOR_BASE = 0 |
| 66 | }; |
| 67 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 68 | /* |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 69 | * Our lifetime rules for these structs are the following: |
| 70 | * device special file is opened, we take a reference on the |
| 71 | * ib_umad_port's struct ib_umad_device. We drop these |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 72 | * references in the corresponding close(). |
| 73 | * |
| 74 | * In addition to references coming from open character devices, there |
| 75 | * is one more reference to each ib_umad_device representing the |
| 76 | * module's reference taken when allocating the ib_umad_device in |
| 77 | * ib_umad_add_one(). |
| 78 | * |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 79 | * When destroying an ib_umad_device, we drop the module's reference. |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 80 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 82 | struct ib_umad_port { |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 83 | struct cdev cdev; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 84 | struct device *dev; |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 85 | |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 86 | struct cdev sm_cdev; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 87 | struct device *sm_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | struct semaphore sm_sem; |
| 89 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 90 | struct mutex file_mutex; |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 91 | struct list_head file_list; |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | struct ib_device *ib_dev; |
| 94 | struct ib_umad_device *umad_dev; |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 95 | int dev_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | u8 port_num; |
| 97 | }; |
| 98 | |
| 99 | struct ib_umad_device { |
| 100 | int start_port, end_port; |
| 101 | struct kref ref; |
| 102 | struct ib_umad_port port[0]; |
| 103 | }; |
| 104 | |
| 105 | struct ib_umad_file { |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 106 | struct mutex mutex; |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 107 | struct ib_umad_port *port; |
| 108 | struct list_head recv_list; |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 109 | struct list_head send_list; |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 110 | struct list_head port_list; |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 111 | spinlock_t send_lock; |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 112 | wait_queue_head_t recv_wait; |
| 113 | struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; |
| 114 | int agents_dead; |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 115 | u8 use_pkey_index; |
| 116 | u8 already_used; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | struct ib_umad_packet { |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 120 | struct ib_mad_send_buf *msg; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 121 | struct ib_mad_recv_wc *recv_wc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | struct list_head list; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 123 | int length; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 124 | struct ib_user_mad mad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | }; |
| 126 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 127 | static struct class *umad_class; |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 130 | |
| 131 | static DEFINE_SPINLOCK(port_lock); |
Hal Rosenstock | 9a4b65e | 2007-04-02 12:45:16 -0400 | [diff] [blame] | 132 | static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
| 134 | static void ib_umad_add_one(struct ib_device *device); |
| 135 | static void ib_umad_remove_one(struct ib_device *device); |
| 136 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 137 | static void ib_umad_release_dev(struct kref *ref) |
| 138 | { |
| 139 | struct ib_umad_device *dev = |
| 140 | container_of(ref, struct ib_umad_device, ref); |
| 141 | |
| 142 | kfree(dev); |
| 143 | } |
| 144 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 145 | static int hdr_size(struct ib_umad_file *file) |
| 146 | { |
| 147 | return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) : |
| 148 | sizeof (struct ib_user_mad_hdr_old); |
| 149 | } |
| 150 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 151 | /* caller must hold file->mutex */ |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 152 | static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id) |
| 153 | { |
| 154 | return file->agents_dead ? NULL : file->agent[id]; |
| 155 | } |
| 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | static int queue_packet(struct ib_umad_file *file, |
| 158 | struct ib_mad_agent *agent, |
| 159 | struct ib_umad_packet *packet) |
| 160 | { |
| 161 | int ret = 1; |
| 162 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 163 | mutex_lock(&file->mutex); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 164 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 165 | for (packet->mad.hdr.id = 0; |
| 166 | packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; |
| 167 | packet->mad.hdr.id++) |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 168 | if (agent == __get_agent(file, packet->mad.hdr.id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | list_add_tail(&packet->list, &file->recv_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | wake_up_interruptible(&file->recv_wait); |
| 171 | ret = 0; |
| 172 | break; |
| 173 | } |
| 174 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 175 | mutex_unlock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
| 177 | return ret; |
| 178 | } |
| 179 | |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 180 | static void dequeue_send(struct ib_umad_file *file, |
| 181 | struct ib_umad_packet *packet) |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 182 | { |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 183 | spin_lock_irq(&file->send_lock); |
| 184 | list_del(&packet->list); |
| 185 | spin_unlock_irq(&file->send_lock); |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 186 | } |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | static void send_handler(struct ib_mad_agent *agent, |
| 189 | struct ib_mad_send_wc *send_wc) |
| 190 | { |
| 191 | struct ib_umad_file *file = agent->context; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 192 | struct ib_umad_packet *packet = send_wc->send_buf->context[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 194 | dequeue_send(file, packet); |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 195 | ib_destroy_ah(packet->msg->ah); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 196 | ib_free_send_mad(packet->msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
| 198 | if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 199 | packet->length = IB_MGMT_MAD_HDR; |
| 200 | packet->mad.hdr.status = ETIMEDOUT; |
| 201 | if (!queue_packet(file, agent, packet)) |
| 202 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | kfree(packet); |
| 205 | } |
| 206 | |
| 207 | static void recv_handler(struct ib_mad_agent *agent, |
| 208 | struct ib_mad_recv_wc *mad_recv_wc) |
| 209 | { |
| 210 | struct ib_umad_file *file = agent->context; |
| 211 | struct ib_umad_packet *packet; |
| 212 | |
| 213 | if (mad_recv_wc->wc->status != IB_WC_SUCCESS) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 214 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 216 | packet = kzalloc(sizeof *packet, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | if (!packet) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 218 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 220 | packet->length = mad_recv_wc->mad_len; |
| 221 | packet->recv_wc = mad_recv_wc; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 222 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 223 | packet->mad.hdr.status = 0; |
| 224 | packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len; |
| 225 | packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); |
| 226 | packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); |
| 227 | packet->mad.hdr.sl = mad_recv_wc->wc->sl; |
| 228 | packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; |
| 229 | packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 230 | packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); |
| 231 | if (packet->mad.hdr.grh_present) { |
Sean Hefty | aeba84a | 2007-04-05 11:49:21 -0700 | [diff] [blame] | 232 | struct ib_ah_attr ah_attr; |
| 233 | |
| 234 | ib_init_ah_from_wc(agent->device, agent->port_num, |
| 235 | mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, |
| 236 | &ah_attr); |
| 237 | |
| 238 | packet->mad.hdr.gid_index = ah_attr.grh.sgid_index; |
| 239 | packet->mad.hdr.hop_limit = ah_attr.grh.hop_limit; |
| 240 | packet->mad.hdr.traffic_class = ah_attr.grh.traffic_class; |
| 241 | memcpy(packet->mad.hdr.gid, &ah_attr.grh.dgid, 16); |
| 242 | packet->mad.hdr.flow_label = cpu_to_be32(ah_attr.grh.flow_label); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | if (queue_packet(file, agent, packet)) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 246 | goto err2; |
| 247 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 249 | err2: |
| 250 | kfree(packet); |
| 251 | err1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | ib_free_recv_mad(mad_recv_wc); |
| 253 | } |
| 254 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 255 | static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf, |
| 256 | struct ib_umad_packet *packet, size_t count) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 257 | { |
| 258 | struct ib_mad_recv_buf *recv_buf; |
| 259 | int left, seg_payload, offset, max_seg_payload; |
| 260 | |
| 261 | /* We need enough room to copy the first (or only) MAD segment. */ |
| 262 | recv_buf = &packet->recv_wc->recv_buf; |
| 263 | if ((packet->length <= sizeof (*recv_buf->mad) && |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 264 | count < hdr_size(file) + packet->length) || |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 265 | (packet->length > sizeof (*recv_buf->mad) && |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 266 | count < hdr_size(file) + sizeof (*recv_buf->mad))) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 267 | return -EINVAL; |
| 268 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 269 | if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 270 | return -EFAULT; |
| 271 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 272 | buf += hdr_size(file); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 273 | seg_payload = min_t(int, packet->length, sizeof (*recv_buf->mad)); |
| 274 | if (copy_to_user(buf, recv_buf->mad, seg_payload)) |
| 275 | return -EFAULT; |
| 276 | |
| 277 | if (seg_payload < packet->length) { |
| 278 | /* |
| 279 | * Multipacket RMPP MAD message. Copy remainder of message. |
| 280 | * Note that last segment may have a shorter payload. |
| 281 | */ |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 282 | if (count < hdr_size(file) + packet->length) { |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 283 | /* |
| 284 | * The buffer is too small, return the first RMPP segment, |
| 285 | * which includes the RMPP message length. |
| 286 | */ |
| 287 | return -ENOSPC; |
| 288 | } |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 289 | offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 290 | max_seg_payload = sizeof (struct ib_mad) - offset; |
| 291 | |
| 292 | for (left = packet->length - seg_payload, buf += seg_payload; |
| 293 | left; left -= seg_payload, buf += seg_payload) { |
| 294 | recv_buf = container_of(recv_buf->list.next, |
| 295 | struct ib_mad_recv_buf, list); |
| 296 | seg_payload = min(left, max_seg_payload); |
| 297 | if (copy_to_user(buf, ((void *) recv_buf->mad) + offset, |
| 298 | seg_payload)) |
| 299 | return -EFAULT; |
| 300 | } |
| 301 | } |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 302 | return hdr_size(file) + packet->length; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 303 | } |
| 304 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 305 | static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf, |
| 306 | struct ib_umad_packet *packet, size_t count) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 307 | { |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 308 | ssize_t size = hdr_size(file) + packet->length; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 309 | |
| 310 | if (count < size) |
| 311 | return -EINVAL; |
| 312 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 313 | if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
| 314 | return -EFAULT; |
| 315 | |
| 316 | buf += hdr_size(file); |
| 317 | |
| 318 | if (copy_to_user(buf, packet->mad.data, packet->length)) |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 319 | return -EFAULT; |
| 320 | |
| 321 | return size; |
| 322 | } |
| 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | static ssize_t ib_umad_read(struct file *filp, char __user *buf, |
| 325 | size_t count, loff_t *pos) |
| 326 | { |
| 327 | struct ib_umad_file *file = filp->private_data; |
| 328 | struct ib_umad_packet *packet; |
| 329 | ssize_t ret; |
| 330 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 331 | if (count < hdr_size(file)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | return -EINVAL; |
| 333 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 334 | mutex_lock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | while (list_empty(&file->recv_list)) { |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 337 | mutex_unlock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | if (filp->f_flags & O_NONBLOCK) |
| 340 | return -EAGAIN; |
| 341 | |
| 342 | if (wait_event_interruptible(file->recv_wait, |
| 343 | !list_empty(&file->recv_list))) |
| 344 | return -ERESTARTSYS; |
| 345 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 346 | mutex_lock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); |
| 350 | list_del(&packet->list); |
| 351 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 352 | mutex_unlock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 354 | if (packet->recv_wc) |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 355 | ret = copy_recv_mad(file, buf, packet, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | else |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 357 | ret = copy_send_mad(file, buf, packet, count); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 358 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 359 | if (ret < 0) { |
| 360 | /* Requeue packet */ |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 361 | mutex_lock(&file->mutex); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 362 | list_add(&packet->list, &file->recv_list); |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 363 | mutex_unlock(&file->mutex); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 364 | } else { |
| 365 | if (packet->recv_wc) |
| 366 | ib_free_recv_mad(packet->recv_wc); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 367 | kfree(packet); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 368 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | return ret; |
| 370 | } |
| 371 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 372 | static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) |
| 373 | { |
| 374 | int left, seg; |
| 375 | |
| 376 | /* Copy class specific header */ |
| 377 | if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && |
| 378 | copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, |
| 379 | msg->hdr_len - IB_MGMT_RMPP_HDR)) |
| 380 | return -EFAULT; |
| 381 | |
| 382 | /* All headers are in place. Copy data segments. */ |
| 383 | for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; |
| 384 | seg++, left -= msg->seg_size, buf += msg->seg_size) { |
| 385 | if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, |
| 386 | min(left, msg->seg_size))) |
| 387 | return -EFAULT; |
| 388 | } |
| 389 | return 0; |
| 390 | } |
| 391 | |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 392 | static int same_destination(struct ib_user_mad_hdr *hdr1, |
| 393 | struct ib_user_mad_hdr *hdr2) |
| 394 | { |
| 395 | if (!hdr1->grh_present && !hdr2->grh_present) |
| 396 | return (hdr1->lid == hdr2->lid); |
| 397 | |
| 398 | if (hdr1->grh_present && hdr2->grh_present) |
| 399 | return !memcmp(hdr1->gid, hdr2->gid, 16); |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int is_duplicate(struct ib_umad_file *file, |
| 405 | struct ib_umad_packet *packet) |
| 406 | { |
| 407 | struct ib_umad_packet *sent_packet; |
| 408 | struct ib_mad_hdr *sent_hdr, *hdr; |
| 409 | |
| 410 | hdr = (struct ib_mad_hdr *) packet->mad.data; |
| 411 | list_for_each_entry(sent_packet, &file->send_list, list) { |
| 412 | sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; |
| 413 | |
| 414 | if ((hdr->tid != sent_hdr->tid) || |
| 415 | (hdr->mgmt_class != sent_hdr->mgmt_class)) |
| 416 | continue; |
| 417 | |
| 418 | /* |
| 419 | * No need to be overly clever here. If two new operations have |
| 420 | * the same TID, reject the second as a duplicate. This is more |
| 421 | * restrictive than required by the spec. |
| 422 | */ |
| 423 | if (!ib_response_mad((struct ib_mad *) hdr)) { |
| 424 | if (!ib_response_mad((struct ib_mad *) sent_hdr)) |
| 425 | return 1; |
| 426 | continue; |
| 427 | } else if (!ib_response_mad((struct ib_mad *) sent_hdr)) |
| 428 | continue; |
| 429 | |
| 430 | if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) |
| 431 | return 1; |
| 432 | } |
| 433 | |
| 434 | return 0; |
| 435 | } |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | static ssize_t ib_umad_write(struct file *filp, const char __user *buf, |
| 438 | size_t count, loff_t *pos) |
| 439 | { |
| 440 | struct ib_umad_file *file = filp->private_data; |
| 441 | struct ib_umad_packet *packet; |
| 442 | struct ib_mad_agent *agent; |
| 443 | struct ib_ah_attr ah_attr; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 444 | struct ib_ah *ah; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 445 | struct ib_rmpp_mad *rmpp_mad; |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 446 | __be64 *tid; |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 447 | int ret, data_len, hdr_len, copy_offset, rmpp_active; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 449 | if (count < hdr_size(file) + IB_MGMT_RMPP_HDR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | return -EINVAL; |
| 451 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 452 | packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (!packet) |
| 454 | return -ENOMEM; |
| 455 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 456 | if (copy_from_user(&packet->mad, buf, hdr_size(file))) { |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 457 | ret = -EFAULT; |
| 458 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | } |
| 460 | |
Hefty, Sean | caf6e3f | 2011-10-06 09:33:05 -0700 | [diff] [blame] | 461 | if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | ret = -EINVAL; |
| 463 | goto err; |
| 464 | } |
| 465 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 466 | buf += hdr_size(file); |
| 467 | |
| 468 | if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { |
| 469 | ret = -EFAULT; |
| 470 | goto err; |
| 471 | } |
| 472 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 473 | mutex_lock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 475 | agent = __get_agent(file, packet->mad.hdr.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | if (!agent) { |
| 477 | ret = -EINVAL; |
| 478 | goto err_up; |
| 479 | } |
| 480 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | memset(&ah_attr, 0, sizeof ah_attr); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 482 | ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid); |
| 483 | ah_attr.sl = packet->mad.hdr.sl; |
| 484 | ah_attr.src_path_bits = packet->mad.hdr.path_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | ah_attr.port_num = file->port->port_num; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 486 | if (packet->mad.hdr.grh_present) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | ah_attr.ah_flags = IB_AH_GRH; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 488 | memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16); |
Sean Hefty | aeba84a | 2007-04-05 11:49:21 -0700 | [diff] [blame] | 489 | ah_attr.grh.sgid_index = packet->mad.hdr.gid_index; |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 490 | ah_attr.grh.flow_label = be32_to_cpu(packet->mad.hdr.flow_label); |
| 491 | ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 492 | ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } |
| 494 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 495 | ah = ib_create_ah(agent->qp->pd, &ah_attr); |
| 496 | if (IS_ERR(ah)) { |
| 497 | ret = PTR_ERR(ah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | goto err_up; |
| 499 | } |
| 500 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 501 | rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 502 | hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
| 503 | if (!ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)) { |
Sean Hefty | cb0f091 | 2005-10-27 20:48:11 -0700 | [diff] [blame] | 504 | copy_offset = IB_MGMT_MAD_HDR; |
Michael S. Tsirkin | bf6d9e2 | 2005-11-28 13:07:20 -0800 | [diff] [blame] | 505 | rmpp_active = 0; |
Hal Rosenstock | 618a3c0 | 2006-03-28 16:40:04 -0800 | [diff] [blame] | 506 | } else { |
| 507 | copy_offset = IB_MGMT_RMPP_HDR; |
| 508 | rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
| 509 | IB_MGMT_RMPP_FLAG_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 512 | data_len = count - hdr_size(file) - hdr_len; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 513 | packet->msg = ib_create_send_mad(agent, |
| 514 | be32_to_cpu(packet->mad.hdr.qpn), |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 515 | packet->mad.hdr.pkey_index, rmpp_active, |
| 516 | hdr_len, data_len, GFP_KERNEL); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 517 | if (IS_ERR(packet->msg)) { |
| 518 | ret = PTR_ERR(packet->msg); |
| 519 | goto err_ah; |
| 520 | } |
| 521 | |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 522 | packet->msg->ah = ah; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 523 | packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 524 | packet->msg->retries = packet->mad.hdr.retries; |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 525 | packet->msg->context[0] = packet; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 526 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 527 | /* Copy MAD header. Any RMPP header is already in place. */ |
Sean Hefty | cb0f091 | 2005-10-27 20:48:11 -0700 | [diff] [blame] | 528 | memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 529 | |
| 530 | if (!rmpp_active) { |
| 531 | if (copy_from_user(packet->msg->mad + copy_offset, |
| 532 | buf + copy_offset, |
| 533 | hdr_len + data_len - copy_offset)) { |
| 534 | ret = -EFAULT; |
| 535 | goto err_msg; |
| 536 | } |
| 537 | } else { |
| 538 | ret = copy_rmpp_mad(packet->msg, buf); |
| 539 | if (ret) |
| 540 | goto err_msg; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | /* |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 544 | * Set the high-order part of the transaction ID to make MADs from |
| 545 | * different agents unique, and allow routing responses back to the |
| 546 | * original requestor. |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 547 | */ |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 548 | if (!ib_response_mad(packet->msg->mad)) { |
Roland Dreier | 089a1be | 2005-10-27 20:33:43 -0700 | [diff] [blame] | 549 | tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 550 | *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | |
| 551 | (be64_to_cpup(tid) & 0xffffffff)); |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 552 | rmpp_mad->mad_hdr.tid = *tid; |
| 553 | } |
| 554 | |
| 555 | spin_lock_irq(&file->send_lock); |
| 556 | ret = is_duplicate(file, packet); |
| 557 | if (!ret) |
| 558 | list_add_tail(&packet->list, &file->send_list); |
| 559 | spin_unlock_irq(&file->send_lock); |
| 560 | if (ret) { |
| 561 | ret = -EINVAL; |
| 562 | goto err_msg; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 563 | } |
| 564 | |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 565 | ret = ib_post_send_mad(packet->msg, NULL); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 566 | if (ret) |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 567 | goto err_send; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 568 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 569 | mutex_unlock(&file->mutex); |
Sean Hefty | cb0f091 | 2005-10-27 20:48:11 -0700 | [diff] [blame] | 570 | return count; |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 571 | |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 572 | err_send: |
| 573 | dequeue_send(file, packet); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 574 | err_msg: |
| 575 | ib_free_send_mad(packet->msg); |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 576 | err_ah: |
Sean Hefty | 34816ad | 2005-10-25 10:51:39 -0700 | [diff] [blame] | 577 | ib_destroy_ah(ah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | err_up: |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 579 | mutex_unlock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | err: |
| 581 | kfree(packet); |
| 582 | return ret; |
| 583 | } |
| 584 | |
| 585 | static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) |
| 586 | { |
| 587 | struct ib_umad_file *file = filp->private_data; |
| 588 | |
| 589 | /* we will always be able to post a MAD send */ |
| 590 | unsigned int mask = POLLOUT | POLLWRNORM; |
| 591 | |
| 592 | poll_wait(filp, &file->recv_wait, wait); |
| 593 | |
| 594 | if (!list_empty(&file->recv_list)) |
| 595 | mask |= POLLIN | POLLRDNORM; |
| 596 | |
| 597 | return mask; |
| 598 | } |
| 599 | |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 600 | static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg, |
| 601 | int compat_method_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { |
| 603 | struct ib_user_mad_reg_req ureq; |
| 604 | struct ib_mad_reg_req req; |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 605 | struct ib_mad_agent *agent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | int agent_id; |
| 607 | int ret; |
| 608 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 609 | mutex_lock(&file->port->file_mutex); |
| 610 | mutex_lock(&file->mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 611 | |
| 612 | if (!file->port->ib_dev) { |
| 613 | ret = -EPIPE; |
| 614 | goto out; |
| 615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 617 | if (copy_from_user(&ureq, arg, sizeof ureq)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | ret = -EFAULT; |
| 619 | goto out; |
| 620 | } |
| 621 | |
| 622 | if (ureq.qpn != 0 && ureq.qpn != 1) { |
| 623 | ret = -EINVAL; |
| 624 | goto out; |
| 625 | } |
| 626 | |
| 627 | for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 628 | if (!__get_agent(file, agent_id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | goto found; |
| 630 | |
| 631 | ret = -ENOMEM; |
| 632 | goto out; |
| 633 | |
| 634 | found: |
Roland Dreier | 0df3bb1 | 2005-04-16 15:26:11 -0700 | [diff] [blame] | 635 | if (ureq.mgmt_class) { |
| 636 | req.mgmt_class = ureq.mgmt_class; |
| 637 | req.mgmt_class_version = ureq.mgmt_class_version; |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 638 | memcpy(req.oui, ureq.oui, sizeof req.oui); |
| 639 | |
| 640 | if (compat_method_mask) { |
| 641 | u32 *umm = (u32 *) ureq.method_mask; |
| 642 | int i; |
| 643 | |
| 644 | for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i) |
| 645 | req.method_mask[i] = |
| 646 | umm[i * 2] | ((u64) umm[i * 2 + 1] << 32); |
| 647 | } else |
| 648 | memcpy(req.method_mask, ureq.method_mask, |
| 649 | sizeof req.method_mask); |
Roland Dreier | 0df3bb1 | 2005-04-16 15:26:11 -0700 | [diff] [blame] | 650 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, |
| 653 | ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, |
Roland Dreier | 0df3bb1 | 2005-04-16 15:26:11 -0700 | [diff] [blame] | 654 | ureq.mgmt_class ? &req : NULL, |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 655 | ureq.rmpp_version, |
| 656 | send_handler, recv_handler, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | if (IS_ERR(agent)) { |
| 658 | ret = PTR_ERR(agent); |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 659 | agent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | goto out; |
| 661 | } |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | if (put_user(agent_id, |
| 664 | (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) { |
| 665 | ret = -EFAULT; |
Roland Dreier | ec914c5 | 2005-11-09 09:58:10 -0800 | [diff] [blame] | 666 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
| 668 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 669 | if (!file->already_used) { |
| 670 | file->already_used = 1; |
| 671 | if (!file->use_pkey_index) { |
| 672 | printk(KERN_WARNING "user_mad: process %s did not enable " |
| 673 | "P_Key index support.\n", current->comm); |
| 674 | printk(KERN_WARNING "user_mad: Documentation/infiniband/user_mad.txt " |
| 675 | "has info on the new ABI.\n"); |
| 676 | } |
| 677 | } |
| 678 | |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 679 | file->agent[agent_id] = agent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | ret = 0; |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | out: |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 683 | mutex_unlock(&file->mutex); |
| 684 | |
| 685 | if (ret && agent) |
| 686 | ib_unregister_mad_agent(agent); |
| 687 | |
| 688 | mutex_unlock(&file->port->file_mutex); |
| 689 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | return ret; |
| 691 | } |
| 692 | |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 693 | static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 695 | struct ib_mad_agent *agent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | u32 id; |
| 697 | int ret = 0; |
| 698 | |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 699 | if (get_user(id, arg)) |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 700 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 702 | mutex_lock(&file->port->file_mutex); |
| 703 | mutex_lock(&file->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
Hefty, Sean | caf6e3f | 2011-10-06 09:33:05 -0700 | [diff] [blame] | 705 | if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | ret = -EINVAL; |
| 707 | goto out; |
| 708 | } |
| 709 | |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 710 | agent = file->agent[id]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | file->agent[id] = NULL; |
| 712 | |
| 713 | out: |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 714 | mutex_unlock(&file->mutex); |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 715 | |
Roland Dreier | ec914c5 | 2005-11-09 09:58:10 -0800 | [diff] [blame] | 716 | if (agent) |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 717 | ib_unregister_mad_agent(agent); |
Roland Dreier | 2f76e82 | 2005-11-07 10:41:29 -0800 | [diff] [blame] | 718 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 719 | mutex_unlock(&file->port->file_mutex); |
| 720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | return ret; |
| 722 | } |
| 723 | |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 724 | static long ib_umad_enable_pkey(struct ib_umad_file *file) |
| 725 | { |
| 726 | int ret = 0; |
| 727 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 728 | mutex_lock(&file->mutex); |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 729 | if (file->already_used) |
| 730 | ret = -EINVAL; |
| 731 | else |
| 732 | file->use_pkey_index = 1; |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 733 | mutex_unlock(&file->mutex); |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 734 | |
| 735 | return ret; |
| 736 | } |
| 737 | |
Hal Rosenstock | cb183a0 | 2005-07-27 11:45:42 -0700 | [diff] [blame] | 738 | static long ib_umad_ioctl(struct file *filp, unsigned int cmd, |
| 739 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | { |
| 741 | switch (cmd) { |
| 742 | case IB_USER_MAD_REGISTER_AGENT: |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 743 | return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | case IB_USER_MAD_UNREGISTER_AGENT: |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 745 | return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg); |
Roland Dreier | 2be8e3e | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 746 | case IB_USER_MAD_ENABLE_PKEY: |
| 747 | return ib_umad_enable_pkey(filp->private_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | default: |
| 749 | return -ENOIOCTLCMD; |
| 750 | } |
| 751 | } |
| 752 | |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 753 | #ifdef CONFIG_COMPAT |
| 754 | static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd, |
| 755 | unsigned long arg) |
| 756 | { |
| 757 | switch (cmd) { |
| 758 | case IB_USER_MAD_REGISTER_AGENT: |
| 759 | return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1); |
| 760 | case IB_USER_MAD_UNREGISTER_AGENT: |
| 761 | return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg)); |
| 762 | case IB_USER_MAD_ENABLE_PKEY: |
| 763 | return ib_umad_enable_pkey(filp->private_data); |
| 764 | default: |
| 765 | return -ENOIOCTLCMD; |
| 766 | } |
| 767 | } |
| 768 | #endif |
| 769 | |
Roland Dreier | feae1ef | 2008-07-11 13:54:40 -0700 | [diff] [blame] | 770 | /* |
| 771 | * ib_umad_open() does not need the BKL: |
| 772 | * |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 773 | * - the ib_umad_port structures are properly reference counted, and |
Roland Dreier | feae1ef | 2008-07-11 13:54:40 -0700 | [diff] [blame] | 774 | * everything else is purely local to the file being created, so |
| 775 | * races against other open calls are not a problem; |
| 776 | * - the ioctl method does not affect any global state outside of the |
| 777 | * file structure being operated on; |
Roland Dreier | feae1ef | 2008-07-11 13:54:40 -0700 | [diff] [blame] | 778 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | static int ib_umad_open(struct inode *inode, struct file *filp) |
| 780 | { |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 781 | struct ib_umad_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | struct ib_umad_file *file; |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 783 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 785 | port = container_of(inode->i_cdev, struct ib_umad_port, cdev); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 786 | if (port) |
| 787 | kref_get(&port->umad_dev->ref); |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 788 | else |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 789 | return -ENXIO; |
| 790 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 791 | mutex_lock(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 792 | |
| 793 | if (!port->ib_dev) { |
| 794 | ret = -ENXIO; |
| 795 | goto out; |
| 796 | } |
| 797 | |
Sean Hefty | cb0f091 | 2005-10-27 20:48:11 -0700 | [diff] [blame] | 798 | file = kzalloc(sizeof *file, GFP_KERNEL); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 799 | if (!file) { |
| 800 | kref_put(&port->umad_dev->ref, ib_umad_release_dev); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 801 | ret = -ENOMEM; |
| 802 | goto out; |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 805 | mutex_init(&file->mutex); |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 806 | spin_lock_init(&file->send_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | INIT_LIST_HEAD(&file->recv_list); |
Sean Hefty | 2527e68 | 2006-07-20 11:25:50 +0300 | [diff] [blame] | 808 | INIT_LIST_HEAD(&file->send_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | init_waitqueue_head(&file->recv_wait); |
| 810 | |
| 811 | file->port = port; |
| 812 | filp->private_data = file; |
| 813 | |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 814 | list_add_tail(&file->port_list, &port->file_list); |
| 815 | |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 816 | ret = nonseekable_open(inode, filp); |
| 817 | |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 818 | out: |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 819 | mutex_unlock(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 820 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | static int ib_umad_close(struct inode *inode, struct file *filp) |
| 824 | { |
| 825 | struct ib_umad_file *file = filp->private_data; |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 826 | struct ib_umad_device *dev = file->port->umad_dev; |
Roland Dreier | 561e148 | 2005-05-25 12:31:30 -0700 | [diff] [blame] | 827 | struct ib_umad_packet *packet, *tmp; |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 828 | int already_dead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | int i; |
| 830 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 831 | mutex_lock(&file->port->file_mutex); |
| 832 | mutex_lock(&file->mutex); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 833 | |
| 834 | already_dead = file->agents_dead; |
| 835 | file->agents_dead = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 837 | list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { |
| 838 | if (packet->recv_wc) |
| 839 | ib_free_recv_mad(packet->recv_wc); |
Roland Dreier | 561e148 | 2005-05-25 12:31:30 -0700 | [diff] [blame] | 840 | kfree(packet); |
Jack Morgenstein | f36e179 | 2006-03-03 21:54:13 -0800 | [diff] [blame] | 841 | } |
Roland Dreier | 561e148 | 2005-05-25 12:31:30 -0700 | [diff] [blame] | 842 | |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 843 | list_del(&file->port_list); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 844 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 845 | mutex_unlock(&file->mutex); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 846 | |
| 847 | if (!already_dead) |
| 848 | for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) |
| 849 | if (file->agent[i]) |
| 850 | ib_unregister_mad_agent(file->agent[i]); |
| 851 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 852 | mutex_unlock(&file->port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | kfree(file); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 855 | kref_put(&dev->ref, ib_umad_release_dev); |
| 856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | return 0; |
| 858 | } |
| 859 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 860 | static const struct file_operations umad_fops = { |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 861 | .owner = THIS_MODULE, |
| 862 | .read = ib_umad_read, |
| 863 | .write = ib_umad_write, |
| 864 | .poll = ib_umad_poll, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | .unlocked_ioctl = ib_umad_ioctl, |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 866 | #ifdef CONFIG_COMPAT |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 867 | .compat_ioctl = ib_umad_compat_ioctl, |
Roland Dreier | a394f83 | 2007-10-09 19:59:15 -0700 | [diff] [blame] | 868 | #endif |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 869 | .open = ib_umad_open, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 870 | .release = ib_umad_close, |
| 871 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | }; |
| 873 | |
| 874 | static int ib_umad_sm_open(struct inode *inode, struct file *filp) |
| 875 | { |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 876 | struct ib_umad_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | struct ib_port_modify props = { |
| 878 | .set_port_cap_mask = IB_PORT_SM |
| 879 | }; |
| 880 | int ret; |
| 881 | |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 882 | port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 883 | if (port) |
| 884 | kref_get(&port->umad_dev->ref); |
Alexander Chiang | 6aa2a86 | 2010-02-02 19:08:30 +0000 | [diff] [blame] | 885 | else |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 886 | return -ENXIO; |
| 887 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | if (filp->f_flags & O_NONBLOCK) { |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 889 | if (down_trylock(&port->sm_sem)) { |
| 890 | ret = -EAGAIN; |
| 891 | goto fail; |
| 892 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } else { |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 894 | if (down_interruptible(&port->sm_sem)) { |
| 895 | ret = -ERESTARTSYS; |
| 896 | goto fail; |
| 897 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | } |
| 899 | |
| 900 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); |
| 901 | if (ret) { |
| 902 | up(&port->sm_sem); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 903 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | filp->private_data = port; |
| 907 | |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 908 | return nonseekable_open(inode, filp); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 909 | |
| 910 | fail: |
| 911 | kref_put(&port->umad_dev->ref, ib_umad_release_dev); |
| 912 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | } |
| 914 | |
| 915 | static int ib_umad_sm_close(struct inode *inode, struct file *filp) |
| 916 | { |
| 917 | struct ib_umad_port *port = filp->private_data; |
| 918 | struct ib_port_modify props = { |
| 919 | .clr_port_cap_mask = IB_PORT_SM |
| 920 | }; |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 921 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 923 | mutex_lock(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 924 | if (port->ib_dev) |
| 925 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 926 | mutex_unlock(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | up(&port->sm_sem); |
| 929 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 930 | kref_put(&port->umad_dev->ref, ib_umad_release_dev); |
| 931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | return ret; |
| 933 | } |
| 934 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 935 | static const struct file_operations umad_sm_fops = { |
Alexander Chiang | d3f2c67 | 2010-02-02 19:08:50 +0000 | [diff] [blame] | 936 | .owner = THIS_MODULE, |
| 937 | .open = ib_umad_sm_open, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 938 | .release = ib_umad_sm_close, |
| 939 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | }; |
| 941 | |
| 942 | static struct ib_client umad_client = { |
| 943 | .name = "umad", |
| 944 | .add = ib_umad_add_one, |
| 945 | .remove = ib_umad_remove_one |
| 946 | }; |
| 947 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 948 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
| 949 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 951 | struct ib_umad_port *port = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 953 | if (!port) |
| 954 | return -ENODEV; |
| 955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | return sprintf(buf, "%s\n", port->ib_dev->name); |
| 957 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 958 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 960 | static ssize_t show_port(struct device *dev, struct device_attribute *attr, |
| 961 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 963 | struct ib_umad_port *port = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 965 | if (!port) |
| 966 | return -ENODEV; |
| 967 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | return sprintf(buf, "%d\n", port->port_num); |
| 969 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 970 | static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 972 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
| 973 | __stringify(IB_USER_MAD_ABI_VERSION)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Alexander Chiang | 8698d3f | 2010-02-02 19:08:45 +0000 | [diff] [blame] | 975 | static dev_t overflow_maj; |
| 976 | static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS); |
| 977 | static int find_overflow_devnum(void) |
| 978 | { |
| 979 | int ret; |
| 980 | |
| 981 | if (!overflow_maj) { |
| 982 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2, |
| 983 | "infiniband_mad"); |
| 984 | if (ret) { |
| 985 | printk(KERN_ERR "user_mad: couldn't register dynamic device number\n"); |
| 986 | return ret; |
| 987 | } |
| 988 | } |
| 989 | |
| 990 | ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS); |
| 991 | if (ret >= IB_UMAD_MAX_PORTS) |
| 992 | return -1; |
| 993 | |
| 994 | return ret; |
| 995 | } |
| 996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | static int ib_umad_init_port(struct ib_device *device, int port_num, |
| 998 | struct ib_umad_port *port) |
| 999 | { |
Alexander Chiang | d451b8d | 2010-02-02 19:08:35 +0000 | [diff] [blame] | 1000 | int devnum; |
Alexander Chiang | dc2ed5e | 2010-02-02 19:08:40 +0000 | [diff] [blame] | 1001 | dev_t base; |
Alexander Chiang | d451b8d | 2010-02-02 19:08:35 +0000 | [diff] [blame] | 1002 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1003 | spin_lock(&port_lock); |
Alexander Chiang | d451b8d | 2010-02-02 19:08:35 +0000 | [diff] [blame] | 1004 | devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); |
| 1005 | if (devnum >= IB_UMAD_MAX_PORTS) { |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1006 | spin_unlock(&port_lock); |
Alexander Chiang | 8698d3f | 2010-02-02 19:08:45 +0000 | [diff] [blame] | 1007 | devnum = find_overflow_devnum(); |
| 1008 | if (devnum < 0) |
| 1009 | return -1; |
| 1010 | |
| 1011 | spin_lock(&port_lock); |
| 1012 | port->dev_num = devnum + IB_UMAD_MAX_PORTS; |
| 1013 | base = devnum + overflow_maj; |
| 1014 | set_bit(devnum, overflow_map); |
| 1015 | } else { |
| 1016 | port->dev_num = devnum; |
| 1017 | base = devnum + base_dev; |
| 1018 | set_bit(devnum, dev_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | } |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1020 | spin_unlock(&port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | |
| 1022 | port->ib_dev = device; |
| 1023 | port->port_num = port_num; |
Thomas Gleixner | 557d0540 | 2010-09-07 14:33:31 +0000 | [diff] [blame] | 1024 | sema_init(&port->sm_sem, 1); |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 1025 | mutex_init(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 1026 | INIT_LIST_HEAD(&port->file_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1028 | cdev_init(&port->cdev, &umad_fops); |
| 1029 | port->cdev.owner = THIS_MODULE; |
| 1030 | kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num); |
Alexander Chiang | dc2ed5e | 2010-02-02 19:08:40 +0000 | [diff] [blame] | 1031 | if (cdev_add(&port->cdev, base, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | goto err_cdev; |
| 1033 | |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1034 | port->dev = device_create(umad_class, device->dma_device, |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1035 | port->cdev.dev, port, |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1036 | "umad%d", port->dev_num); |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1037 | if (IS_ERR(port->dev)) |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1038 | goto err_cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1040 | if (device_create_file(port->dev, &dev_attr_ibdev)) |
| 1041 | goto err_dev; |
| 1042 | if (device_create_file(port->dev, &dev_attr_port)) |
| 1043 | goto err_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
Alexander Chiang | dc2ed5e | 2010-02-02 19:08:40 +0000 | [diff] [blame] | 1045 | base += IB_UMAD_MAX_PORTS; |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1046 | cdev_init(&port->sm_cdev, &umad_sm_fops); |
| 1047 | port->sm_cdev.owner = THIS_MODULE; |
| 1048 | kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num); |
Alexander Chiang | dc2ed5e | 2010-02-02 19:08:40 +0000 | [diff] [blame] | 1049 | if (cdev_add(&port->sm_cdev, base, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | goto err_sm_cdev; |
| 1051 | |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1052 | port->sm_dev = device_create(umad_class, device->dma_device, |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1053 | port->sm_cdev.dev, port, |
Greg Kroah-Hartman | 91bd418 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1054 | "issm%d", port->dev_num); |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1055 | if (IS_ERR(port->sm_dev)) |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1056 | goto err_sm_cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1058 | if (device_create_file(port->sm_dev, &dev_attr_ibdev)) |
| 1059 | goto err_sm_dev; |
| 1060 | if (device_create_file(port->sm_dev, &dev_attr_port)) |
| 1061 | goto err_sm_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | |
| 1063 | return 0; |
| 1064 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1065 | err_sm_dev: |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1066 | device_destroy(umad_class, port->sm_cdev.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
| 1068 | err_sm_cdev: |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1069 | cdev_del(&port->sm_cdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1071 | err_dev: |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1072 | device_destroy(umad_class, port->cdev.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | |
| 1074 | err_cdev: |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1075 | cdev_del(&port->cdev); |
Alexander Chiang | 8698d3f | 2010-02-02 19:08:45 +0000 | [diff] [blame] | 1076 | if (port->dev_num < IB_UMAD_MAX_PORTS) |
| 1077 | clear_bit(devnum, dev_map); |
| 1078 | else |
| 1079 | clear_bit(devnum, overflow_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
| 1081 | return -1; |
| 1082 | } |
| 1083 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1084 | static void ib_umad_kill_port(struct ib_umad_port *port) |
| 1085 | { |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 1086 | struct ib_umad_file *file; |
| 1087 | int id; |
| 1088 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1089 | dev_set_drvdata(port->dev, NULL); |
| 1090 | dev_set_drvdata(port->sm_dev, NULL); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1091 | |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1092 | device_destroy(umad_class, port->cdev.dev); |
| 1093 | device_destroy(umad_class, port->sm_cdev.dev); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1094 | |
Alexander Chiang | 2b937af | 2010-02-02 19:08:25 +0000 | [diff] [blame] | 1095 | cdev_del(&port->cdev); |
| 1096 | cdev_del(&port->sm_cdev); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1097 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 1098 | mutex_lock(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 1099 | |
| 1100 | port->ib_dev = NULL; |
| 1101 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 1102 | list_for_each_entry(file, &port->file_list, port_list) { |
| 1103 | mutex_lock(&file->mutex); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 1104 | file->agents_dead = 1; |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 1105 | mutex_unlock(&file->mutex); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 1106 | |
| 1107 | for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) |
| 1108 | if (file->agent[id]) |
| 1109 | ib_unregister_mad_agent(file->agent[id]); |
Roland Dreier | 94382f3 | 2005-11-10 10:18:23 -0800 | [diff] [blame] | 1110 | } |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 1111 | |
Roland Dreier | 2fe7e6f | 2008-01-25 14:15:42 -0800 | [diff] [blame] | 1112 | mutex_unlock(&port->file_mutex); |
Roland Dreier | 0c99cb6 | 2005-11-03 12:01:18 -0800 | [diff] [blame] | 1113 | |
Alexander Chiang | 8698d3f | 2010-02-02 19:08:45 +0000 | [diff] [blame] | 1114 | if (port->dev_num < IB_UMAD_MAX_PORTS) |
| 1115 | clear_bit(port->dev_num, dev_map); |
| 1116 | else |
| 1117 | clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1118 | } |
| 1119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | static void ib_umad_add_one(struct ib_device *device) |
| 1121 | { |
| 1122 | struct ib_umad_device *umad_dev; |
| 1123 | int s, e, i; |
| 1124 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1125 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| 1126 | return; |
| 1127 | |
| 1128 | if (device->node_type == RDMA_NODE_IB_SWITCH) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | s = e = 0; |
| 1130 | else { |
| 1131 | s = 1; |
| 1132 | e = device->phys_port_cnt; |
| 1133 | } |
| 1134 | |
Sean Hefty | cb0f091 | 2005-10-27 20:48:11 -0700 | [diff] [blame] | 1135 | umad_dev = kzalloc(sizeof *umad_dev + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | (e - s + 1) * sizeof (struct ib_umad_port), |
| 1137 | GFP_KERNEL); |
| 1138 | if (!umad_dev) |
| 1139 | return; |
| 1140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | kref_init(&umad_dev->ref); |
| 1142 | |
| 1143 | umad_dev->start_port = s; |
| 1144 | umad_dev->end_port = e; |
| 1145 | |
| 1146 | for (i = s; i <= e; ++i) { |
| 1147 | umad_dev->port[i - s].umad_dev = umad_dev; |
| 1148 | |
| 1149 | if (ib_umad_init_port(device, i, &umad_dev->port[i - s])) |
| 1150 | goto err; |
| 1151 | } |
| 1152 | |
| 1153 | ib_set_client_data(device, &umad_client, umad_dev); |
| 1154 | |
| 1155 | return; |
| 1156 | |
| 1157 | err: |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1158 | while (--i >= s) |
Michael S. Tsirkin | 8b37b94 | 2005-11-06 15:47:02 -0800 | [diff] [blame] | 1159 | ib_umad_kill_port(&umad_dev->port[i - s]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | |
| 1161 | kref_put(&umad_dev->ref, ib_umad_release_dev); |
| 1162 | } |
| 1163 | |
| 1164 | static void ib_umad_remove_one(struct ib_device *device) |
| 1165 | { |
| 1166 | struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client); |
| 1167 | int i; |
| 1168 | |
| 1169 | if (!umad_dev) |
| 1170 | return; |
| 1171 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1172 | for (i = 0; i <= umad_dev->end_port - umad_dev->start_port; ++i) |
| 1173 | ib_umad_kill_port(&umad_dev->port[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
| 1175 | kref_put(&umad_dev->ref, ib_umad_release_dev); |
| 1176 | } |
| 1177 | |
Roland Dreier | c3af098 | 2011-05-23 11:21:47 -0700 | [diff] [blame] | 1178 | static char *umad_devnode(struct device *dev, mode_t *mode) |
| 1179 | { |
| 1180 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
| 1181 | } |
| 1182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | static int __init ib_umad_init(void) |
| 1184 | { |
| 1185 | int ret; |
| 1186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, |
| 1188 | "infiniband_mad"); |
| 1189 | if (ret) { |
| 1190 | printk(KERN_ERR "user_mad: couldn't register device number\n"); |
| 1191 | goto out; |
| 1192 | } |
| 1193 | |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1194 | umad_class = class_create(THIS_MODULE, "infiniband_mad"); |
| 1195 | if (IS_ERR(umad_class)) { |
| 1196 | ret = PTR_ERR(umad_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | printk(KERN_ERR "user_mad: couldn't create class infiniband_mad\n"); |
| 1198 | goto out_chrdev; |
| 1199 | } |
| 1200 | |
Roland Dreier | c3af098 | 2011-05-23 11:21:47 -0700 | [diff] [blame] | 1201 | umad_class->devnode = umad_devnode; |
| 1202 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 1203 | ret = class_create_file(umad_class, &class_attr_abi_version.attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if (ret) { |
| 1205 | printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n"); |
| 1206 | goto out_class; |
| 1207 | } |
| 1208 | |
| 1209 | ret = ib_register_client(&umad_client); |
| 1210 | if (ret) { |
| 1211 | printk(KERN_ERR "user_mad: couldn't register ib_umad client\n"); |
| 1212 | goto out_class; |
| 1213 | } |
| 1214 | |
| 1215 | return 0; |
| 1216 | |
| 1217 | out_class: |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1218 | class_destroy(umad_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
| 1220 | out_chrdev: |
| 1221 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); |
| 1222 | |
| 1223 | out: |
| 1224 | return ret; |
| 1225 | } |
| 1226 | |
| 1227 | static void __exit ib_umad_cleanup(void) |
| 1228 | { |
| 1229 | ib_unregister_client(&umad_client); |
Roland Dreier | a74968f | 2005-10-28 15:37:23 -0700 | [diff] [blame] | 1230 | class_destroy(umad_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); |
Alexander Chiang | 8698d3f | 2010-02-02 19:08:45 +0000 | [diff] [blame] | 1232 | if (overflow_maj) |
| 1233 | unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | } |
| 1235 | |
| 1236 | module_init(ib_umad_init); |
| 1237 | module_exit(ib_umad_cleanup); |