Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. |
| 3 | * Copyright (c) 2005 Cisco Systems. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | * |
| 33 | * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $ |
| 34 | */ |
| 35 | |
| 36 | #include <asm/uaccess.h> |
| 37 | |
| 38 | #include "uverbs.h" |
| 39 | |
| 40 | #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \ |
| 41 | do { \ |
| 42 | (udata)->inbuf = (void __user *) (ibuf); \ |
| 43 | (udata)->outbuf = (void __user *) (obuf); \ |
| 44 | (udata)->inlen = (ilen); \ |
| 45 | (udata)->outlen = (olen); \ |
| 46 | } while (0) |
| 47 | |
| 48 | ssize_t ib_uverbs_query_params(struct ib_uverbs_file *file, |
| 49 | const char __user *buf, |
| 50 | int in_len, int out_len) |
| 51 | { |
| 52 | struct ib_uverbs_query_params cmd; |
| 53 | struct ib_uverbs_query_params_resp resp; |
| 54 | |
| 55 | if (out_len < sizeof resp) |
| 56 | return -ENOSPC; |
| 57 | |
| 58 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 59 | return -EFAULT; |
| 60 | |
| 61 | memset(&resp, 0, sizeof resp); |
| 62 | |
| 63 | resp.num_cq_events = file->device->num_comp; |
| 64 | |
| 65 | if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) |
| 66 | return -EFAULT; |
| 67 | |
| 68 | return in_len; |
| 69 | } |
| 70 | |
| 71 | ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, |
| 72 | const char __user *buf, |
| 73 | int in_len, int out_len) |
| 74 | { |
| 75 | struct ib_uverbs_get_context cmd; |
| 76 | struct ib_uverbs_get_context_resp resp; |
| 77 | struct ib_udata udata; |
| 78 | struct ib_device *ibdev = file->device->ib_dev; |
| 79 | int i; |
| 80 | int ret = in_len; |
| 81 | |
| 82 | if (out_len < sizeof resp) |
| 83 | return -ENOSPC; |
| 84 | |
| 85 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 86 | return -EFAULT; |
| 87 | |
| 88 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 89 | (unsigned long) cmd.response + sizeof resp, |
| 90 | in_len - sizeof cmd, out_len - sizeof resp); |
| 91 | |
| 92 | file->ucontext = ibdev->alloc_ucontext(ibdev, &udata); |
| 93 | if (IS_ERR(file->ucontext)) { |
| 94 | ret = PTR_ERR(file->ucontext); |
| 95 | file->ucontext = NULL; |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | file->ucontext->device = ibdev; |
| 100 | INIT_LIST_HEAD(&file->ucontext->pd_list); |
| 101 | INIT_LIST_HEAD(&file->ucontext->mr_list); |
| 102 | INIT_LIST_HEAD(&file->ucontext->mw_list); |
| 103 | INIT_LIST_HEAD(&file->ucontext->cq_list); |
| 104 | INIT_LIST_HEAD(&file->ucontext->qp_list); |
| 105 | INIT_LIST_HEAD(&file->ucontext->srq_list); |
| 106 | INIT_LIST_HEAD(&file->ucontext->ah_list); |
| 107 | spin_lock_init(&file->ucontext->lock); |
| 108 | |
| 109 | resp.async_fd = file->async_file.fd; |
| 110 | for (i = 0; i < file->device->num_comp; ++i) |
| 111 | if (copy_to_user((void __user *) (unsigned long) cmd.cq_fd_tab + |
| 112 | i * sizeof (__u32), |
| 113 | &file->comp_file[i].fd, sizeof (__u32))) |
| 114 | goto err; |
| 115 | |
| 116 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 117 | &resp, sizeof resp)) |
| 118 | goto err; |
| 119 | |
| 120 | return in_len; |
| 121 | |
| 122 | err: |
| 123 | ibdev->dealloc_ucontext(file->ucontext); |
| 124 | file->ucontext = NULL; |
| 125 | |
| 126 | return -EFAULT; |
| 127 | } |
| 128 | |
| 129 | ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file, |
| 130 | const char __user *buf, |
| 131 | int in_len, int out_len) |
| 132 | { |
| 133 | struct ib_uverbs_query_device cmd; |
| 134 | struct ib_uverbs_query_device_resp resp; |
| 135 | struct ib_device_attr attr; |
| 136 | int ret; |
| 137 | |
| 138 | if (out_len < sizeof resp) |
| 139 | return -ENOSPC; |
| 140 | |
| 141 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 142 | return -EFAULT; |
| 143 | |
| 144 | ret = ib_query_device(file->device->ib_dev, &attr); |
| 145 | if (ret) |
| 146 | return ret; |
| 147 | |
| 148 | memset(&resp, 0, sizeof resp); |
| 149 | |
| 150 | resp.fw_ver = attr.fw_ver; |
| 151 | resp.node_guid = attr.node_guid; |
| 152 | resp.sys_image_guid = attr.sys_image_guid; |
| 153 | resp.max_mr_size = attr.max_mr_size; |
| 154 | resp.page_size_cap = attr.page_size_cap; |
| 155 | resp.vendor_id = attr.vendor_id; |
| 156 | resp.vendor_part_id = attr.vendor_part_id; |
| 157 | resp.hw_ver = attr.hw_ver; |
| 158 | resp.max_qp = attr.max_qp; |
| 159 | resp.max_qp_wr = attr.max_qp_wr; |
| 160 | resp.device_cap_flags = attr.device_cap_flags; |
| 161 | resp.max_sge = attr.max_sge; |
| 162 | resp.max_sge_rd = attr.max_sge_rd; |
| 163 | resp.max_cq = attr.max_cq; |
| 164 | resp.max_cqe = attr.max_cqe; |
| 165 | resp.max_mr = attr.max_mr; |
| 166 | resp.max_pd = attr.max_pd; |
| 167 | resp.max_qp_rd_atom = attr.max_qp_rd_atom; |
| 168 | resp.max_ee_rd_atom = attr.max_ee_rd_atom; |
| 169 | resp.max_res_rd_atom = attr.max_res_rd_atom; |
| 170 | resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom; |
| 171 | resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom; |
| 172 | resp.atomic_cap = attr.atomic_cap; |
| 173 | resp.max_ee = attr.max_ee; |
| 174 | resp.max_rdd = attr.max_rdd; |
| 175 | resp.max_mw = attr.max_mw; |
| 176 | resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp; |
| 177 | resp.max_raw_ethy_qp = attr.max_raw_ethy_qp; |
| 178 | resp.max_mcast_grp = attr.max_mcast_grp; |
| 179 | resp.max_mcast_qp_attach = attr.max_mcast_qp_attach; |
| 180 | resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach; |
| 181 | resp.max_ah = attr.max_ah; |
| 182 | resp.max_fmr = attr.max_fmr; |
| 183 | resp.max_map_per_fmr = attr.max_map_per_fmr; |
| 184 | resp.max_srq = attr.max_srq; |
| 185 | resp.max_srq_wr = attr.max_srq_wr; |
| 186 | resp.max_srq_sge = attr.max_srq_sge; |
| 187 | resp.max_pkeys = attr.max_pkeys; |
| 188 | resp.local_ca_ack_delay = attr.local_ca_ack_delay; |
| 189 | resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt; |
| 190 | |
| 191 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 192 | &resp, sizeof resp)) |
| 193 | return -EFAULT; |
| 194 | |
| 195 | return in_len; |
| 196 | } |
| 197 | |
| 198 | ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file, |
| 199 | const char __user *buf, |
| 200 | int in_len, int out_len) |
| 201 | { |
| 202 | struct ib_uverbs_query_port cmd; |
| 203 | struct ib_uverbs_query_port_resp resp; |
| 204 | struct ib_port_attr attr; |
| 205 | int ret; |
| 206 | |
| 207 | if (out_len < sizeof resp) |
| 208 | return -ENOSPC; |
| 209 | |
| 210 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 211 | return -EFAULT; |
| 212 | |
| 213 | ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr); |
| 214 | if (ret) |
| 215 | return ret; |
| 216 | |
| 217 | memset(&resp, 0, sizeof resp); |
| 218 | |
| 219 | resp.state = attr.state; |
| 220 | resp.max_mtu = attr.max_mtu; |
| 221 | resp.active_mtu = attr.active_mtu; |
| 222 | resp.gid_tbl_len = attr.gid_tbl_len; |
| 223 | resp.port_cap_flags = attr.port_cap_flags; |
| 224 | resp.max_msg_sz = attr.max_msg_sz; |
| 225 | resp.bad_pkey_cntr = attr.bad_pkey_cntr; |
| 226 | resp.qkey_viol_cntr = attr.qkey_viol_cntr; |
| 227 | resp.pkey_tbl_len = attr.pkey_tbl_len; |
| 228 | resp.lid = attr.lid; |
| 229 | resp.sm_lid = attr.sm_lid; |
| 230 | resp.lmc = attr.lmc; |
| 231 | resp.max_vl_num = attr.max_vl_num; |
| 232 | resp.sm_sl = attr.sm_sl; |
| 233 | resp.subnet_timeout = attr.subnet_timeout; |
| 234 | resp.init_type_reply = attr.init_type_reply; |
| 235 | resp.active_width = attr.active_width; |
| 236 | resp.active_speed = attr.active_speed; |
| 237 | resp.phys_state = attr.phys_state; |
| 238 | |
| 239 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 240 | &resp, sizeof resp)) |
| 241 | return -EFAULT; |
| 242 | |
| 243 | return in_len; |
| 244 | } |
| 245 | |
| 246 | ssize_t ib_uverbs_query_gid(struct ib_uverbs_file *file, |
| 247 | const char __user *buf, |
| 248 | int in_len, int out_len) |
| 249 | { |
| 250 | struct ib_uverbs_query_gid cmd; |
| 251 | struct ib_uverbs_query_gid_resp resp; |
| 252 | int ret; |
| 253 | |
| 254 | if (out_len < sizeof resp) |
| 255 | return -ENOSPC; |
| 256 | |
| 257 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 258 | return -EFAULT; |
| 259 | |
| 260 | memset(&resp, 0, sizeof resp); |
| 261 | |
| 262 | ret = ib_query_gid(file->device->ib_dev, cmd.port_num, cmd.index, |
| 263 | (union ib_gid *) resp.gid); |
| 264 | if (ret) |
| 265 | return ret; |
| 266 | |
| 267 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 268 | &resp, sizeof resp)) |
| 269 | return -EFAULT; |
| 270 | |
| 271 | return in_len; |
| 272 | } |
| 273 | |
| 274 | ssize_t ib_uverbs_query_pkey(struct ib_uverbs_file *file, |
| 275 | const char __user *buf, |
| 276 | int in_len, int out_len) |
| 277 | { |
| 278 | struct ib_uverbs_query_pkey cmd; |
| 279 | struct ib_uverbs_query_pkey_resp resp; |
| 280 | int ret; |
| 281 | |
| 282 | if (out_len < sizeof resp) |
| 283 | return -ENOSPC; |
| 284 | |
| 285 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 286 | return -EFAULT; |
| 287 | |
| 288 | memset(&resp, 0, sizeof resp); |
| 289 | |
| 290 | ret = ib_query_pkey(file->device->ib_dev, cmd.port_num, cmd.index, |
| 291 | &resp.pkey); |
| 292 | if (ret) |
| 293 | return ret; |
| 294 | |
| 295 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 296 | &resp, sizeof resp)) |
| 297 | return -EFAULT; |
| 298 | |
| 299 | return in_len; |
| 300 | } |
| 301 | |
| 302 | ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, |
| 303 | const char __user *buf, |
| 304 | int in_len, int out_len) |
| 305 | { |
| 306 | struct ib_uverbs_alloc_pd cmd; |
| 307 | struct ib_uverbs_alloc_pd_resp resp; |
| 308 | struct ib_udata udata; |
| 309 | struct ib_uobject *uobj; |
| 310 | struct ib_pd *pd; |
| 311 | int ret; |
| 312 | |
| 313 | if (out_len < sizeof resp) |
| 314 | return -ENOSPC; |
| 315 | |
| 316 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 317 | return -EFAULT; |
| 318 | |
| 319 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 320 | (unsigned long) cmd.response + sizeof resp, |
| 321 | in_len - sizeof cmd, out_len - sizeof resp); |
| 322 | |
| 323 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 324 | if (!uobj) |
| 325 | return -ENOMEM; |
| 326 | |
| 327 | uobj->context = file->ucontext; |
| 328 | |
| 329 | pd = file->device->ib_dev->alloc_pd(file->device->ib_dev, |
| 330 | file->ucontext, &udata); |
| 331 | if (IS_ERR(pd)) { |
| 332 | ret = PTR_ERR(pd); |
| 333 | goto err; |
| 334 | } |
| 335 | |
| 336 | pd->device = file->device->ib_dev; |
| 337 | pd->uobject = uobj; |
| 338 | atomic_set(&pd->usecnt, 0); |
| 339 | |
| 340 | retry: |
| 341 | if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) { |
| 342 | ret = -ENOMEM; |
| 343 | goto err_pd; |
| 344 | } |
| 345 | |
| 346 | down(&ib_uverbs_idr_mutex); |
| 347 | ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id); |
| 348 | up(&ib_uverbs_idr_mutex); |
| 349 | |
| 350 | if (ret == -EAGAIN) |
| 351 | goto retry; |
| 352 | if (ret) |
| 353 | goto err_pd; |
| 354 | |
| 355 | spin_lock_irq(&file->ucontext->lock); |
| 356 | list_add_tail(&uobj->list, &file->ucontext->pd_list); |
| 357 | spin_unlock_irq(&file->ucontext->lock); |
| 358 | |
| 359 | memset(&resp, 0, sizeof resp); |
| 360 | resp.pd_handle = uobj->id; |
| 361 | |
| 362 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 363 | &resp, sizeof resp)) { |
| 364 | ret = -EFAULT; |
| 365 | goto err_list; |
| 366 | } |
| 367 | |
| 368 | return in_len; |
| 369 | |
| 370 | err_list: |
| 371 | spin_lock_irq(&file->ucontext->lock); |
| 372 | list_del(&uobj->list); |
| 373 | spin_unlock_irq(&file->ucontext->lock); |
| 374 | |
| 375 | down(&ib_uverbs_idr_mutex); |
| 376 | idr_remove(&ib_uverbs_pd_idr, uobj->id); |
| 377 | up(&ib_uverbs_idr_mutex); |
| 378 | |
| 379 | err_pd: |
| 380 | ib_dealloc_pd(pd); |
| 381 | |
| 382 | err: |
| 383 | kfree(uobj); |
| 384 | return ret; |
| 385 | } |
| 386 | |
| 387 | ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file, |
| 388 | const char __user *buf, |
| 389 | int in_len, int out_len) |
| 390 | { |
| 391 | struct ib_uverbs_dealloc_pd cmd; |
| 392 | struct ib_pd *pd; |
| 393 | struct ib_uobject *uobj; |
| 394 | int ret = -EINVAL; |
| 395 | |
| 396 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 397 | return -EFAULT; |
| 398 | |
| 399 | down(&ib_uverbs_idr_mutex); |
| 400 | |
| 401 | pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); |
| 402 | if (!pd || pd->uobject->context != file->ucontext) |
| 403 | goto out; |
| 404 | |
| 405 | uobj = pd->uobject; |
| 406 | |
| 407 | ret = ib_dealloc_pd(pd); |
| 408 | if (ret) |
| 409 | goto out; |
| 410 | |
| 411 | idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle); |
| 412 | |
| 413 | spin_lock_irq(&file->ucontext->lock); |
| 414 | list_del(&uobj->list); |
| 415 | spin_unlock_irq(&file->ucontext->lock); |
| 416 | |
| 417 | kfree(uobj); |
| 418 | |
| 419 | out: |
| 420 | up(&ib_uverbs_idr_mutex); |
| 421 | |
| 422 | return ret ? ret : in_len; |
| 423 | } |
| 424 | |
| 425 | ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, |
| 426 | const char __user *buf, int in_len, |
| 427 | int out_len) |
| 428 | { |
| 429 | struct ib_uverbs_reg_mr cmd; |
| 430 | struct ib_uverbs_reg_mr_resp resp; |
| 431 | struct ib_udata udata; |
| 432 | struct ib_umem_object *obj; |
| 433 | struct ib_pd *pd; |
| 434 | struct ib_mr *mr; |
| 435 | int ret; |
| 436 | |
| 437 | if (out_len < sizeof resp) |
| 438 | return -ENOSPC; |
| 439 | |
| 440 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 441 | return -EFAULT; |
| 442 | |
| 443 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 444 | (unsigned long) cmd.response + sizeof resp, |
| 445 | in_len - sizeof cmd, out_len - sizeof resp); |
| 446 | |
| 447 | if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) |
| 448 | return -EINVAL; |
| 449 | |
| 450 | obj = kmalloc(sizeof *obj, GFP_KERNEL); |
| 451 | if (!obj) |
| 452 | return -ENOMEM; |
| 453 | |
| 454 | obj->uobject.context = file->ucontext; |
| 455 | |
| 456 | /* |
| 457 | * We ask for writable memory if any access flags other than |
| 458 | * "remote read" are set. "Local write" and "remote write" |
| 459 | * obviously require write access. "Remote atomic" can do |
| 460 | * things like fetch and add, which will modify memory, and |
| 461 | * "MW bind" can change permissions by binding a window. |
| 462 | */ |
| 463 | ret = ib_umem_get(file->device->ib_dev, &obj->umem, |
| 464 | (void *) (unsigned long) cmd.start, cmd.length, |
| 465 | !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ)); |
| 466 | if (ret) |
| 467 | goto err_free; |
| 468 | |
| 469 | obj->umem.virt_base = cmd.hca_va; |
| 470 | |
| 471 | down(&ib_uverbs_idr_mutex); |
| 472 | |
| 473 | pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); |
| 474 | if (!pd || pd->uobject->context != file->ucontext) { |
| 475 | ret = -EINVAL; |
| 476 | goto err_up; |
| 477 | } |
| 478 | |
| 479 | if (!pd->device->reg_user_mr) { |
| 480 | ret = -ENOSYS; |
| 481 | goto err_up; |
| 482 | } |
| 483 | |
| 484 | mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata); |
| 485 | if (IS_ERR(mr)) { |
| 486 | ret = PTR_ERR(mr); |
| 487 | goto err_up; |
| 488 | } |
| 489 | |
| 490 | mr->device = pd->device; |
| 491 | mr->pd = pd; |
| 492 | mr->uobject = &obj->uobject; |
| 493 | atomic_inc(&pd->usecnt); |
| 494 | atomic_set(&mr->usecnt, 0); |
| 495 | |
| 496 | memset(&resp, 0, sizeof resp); |
| 497 | resp.lkey = mr->lkey; |
| 498 | resp.rkey = mr->rkey; |
| 499 | |
| 500 | retry: |
| 501 | if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) { |
| 502 | ret = -ENOMEM; |
| 503 | goto err_unreg; |
| 504 | } |
| 505 | |
| 506 | ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id); |
| 507 | |
| 508 | if (ret == -EAGAIN) |
| 509 | goto retry; |
| 510 | if (ret) |
| 511 | goto err_unreg; |
| 512 | |
| 513 | resp.mr_handle = obj->uobject.id; |
| 514 | |
| 515 | spin_lock_irq(&file->ucontext->lock); |
| 516 | list_add_tail(&obj->uobject.list, &file->ucontext->mr_list); |
| 517 | spin_unlock_irq(&file->ucontext->lock); |
| 518 | |
| 519 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 520 | &resp, sizeof resp)) { |
| 521 | ret = -EFAULT; |
| 522 | goto err_list; |
| 523 | } |
| 524 | |
| 525 | up(&ib_uverbs_idr_mutex); |
| 526 | |
| 527 | return in_len; |
| 528 | |
| 529 | err_list: |
| 530 | spin_lock_irq(&file->ucontext->lock); |
| 531 | list_del(&obj->uobject.list); |
| 532 | spin_unlock_irq(&file->ucontext->lock); |
| 533 | |
| 534 | err_unreg: |
| 535 | ib_dereg_mr(mr); |
| 536 | |
| 537 | err_up: |
| 538 | up(&ib_uverbs_idr_mutex); |
| 539 | |
| 540 | ib_umem_release(file->device->ib_dev, &obj->umem); |
| 541 | |
| 542 | err_free: |
| 543 | kfree(obj); |
| 544 | return ret; |
| 545 | } |
| 546 | |
| 547 | ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, |
| 548 | const char __user *buf, int in_len, |
| 549 | int out_len) |
| 550 | { |
| 551 | struct ib_uverbs_dereg_mr cmd; |
| 552 | struct ib_mr *mr; |
| 553 | struct ib_umem_object *memobj; |
| 554 | int ret = -EINVAL; |
| 555 | |
| 556 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 557 | return -EFAULT; |
| 558 | |
| 559 | down(&ib_uverbs_idr_mutex); |
| 560 | |
| 561 | mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle); |
| 562 | if (!mr || mr->uobject->context != file->ucontext) |
| 563 | goto out; |
| 564 | |
| 565 | memobj = container_of(mr->uobject, struct ib_umem_object, uobject); |
| 566 | |
| 567 | ret = ib_dereg_mr(mr); |
| 568 | if (ret) |
| 569 | goto out; |
| 570 | |
| 571 | idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle); |
| 572 | |
| 573 | spin_lock_irq(&file->ucontext->lock); |
| 574 | list_del(&memobj->uobject.list); |
| 575 | spin_unlock_irq(&file->ucontext->lock); |
| 576 | |
| 577 | ib_umem_release(file->device->ib_dev, &memobj->umem); |
| 578 | kfree(memobj); |
| 579 | |
| 580 | out: |
| 581 | up(&ib_uverbs_idr_mutex); |
| 582 | |
| 583 | return ret ? ret : in_len; |
| 584 | } |
| 585 | |
| 586 | ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, |
| 587 | const char __user *buf, int in_len, |
| 588 | int out_len) |
| 589 | { |
| 590 | struct ib_uverbs_create_cq cmd; |
| 591 | struct ib_uverbs_create_cq_resp resp; |
| 592 | struct ib_udata udata; |
| 593 | struct ib_uobject *uobj; |
| 594 | struct ib_cq *cq; |
| 595 | int ret; |
| 596 | |
| 597 | if (out_len < sizeof resp) |
| 598 | return -ENOSPC; |
| 599 | |
| 600 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 601 | return -EFAULT; |
| 602 | |
| 603 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 604 | (unsigned long) cmd.response + sizeof resp, |
| 605 | in_len - sizeof cmd, out_len - sizeof resp); |
| 606 | |
| 607 | if (cmd.event_handler >= file->device->num_comp) |
| 608 | return -EINVAL; |
| 609 | |
| 610 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 611 | if (!uobj) |
| 612 | return -ENOMEM; |
| 613 | |
| 614 | uobj->user_handle = cmd.user_handle; |
| 615 | uobj->context = file->ucontext; |
| 616 | |
| 617 | cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe, |
| 618 | file->ucontext, &udata); |
| 619 | if (IS_ERR(cq)) { |
| 620 | ret = PTR_ERR(cq); |
| 621 | goto err; |
| 622 | } |
| 623 | |
| 624 | cq->device = file->device->ib_dev; |
| 625 | cq->uobject = uobj; |
| 626 | cq->comp_handler = ib_uverbs_comp_handler; |
| 627 | cq->event_handler = ib_uverbs_cq_event_handler; |
| 628 | cq->cq_context = file; |
| 629 | atomic_set(&cq->usecnt, 0); |
| 630 | |
| 631 | retry: |
| 632 | if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) { |
| 633 | ret = -ENOMEM; |
| 634 | goto err_cq; |
| 635 | } |
| 636 | |
| 637 | down(&ib_uverbs_idr_mutex); |
| 638 | ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->id); |
| 639 | up(&ib_uverbs_idr_mutex); |
| 640 | |
| 641 | if (ret == -EAGAIN) |
| 642 | goto retry; |
| 643 | if (ret) |
| 644 | goto err_cq; |
| 645 | |
| 646 | spin_lock_irq(&file->ucontext->lock); |
| 647 | list_add_tail(&uobj->list, &file->ucontext->cq_list); |
| 648 | spin_unlock_irq(&file->ucontext->lock); |
| 649 | |
| 650 | memset(&resp, 0, sizeof resp); |
| 651 | resp.cq_handle = uobj->id; |
| 652 | resp.cqe = cq->cqe; |
| 653 | |
| 654 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 655 | &resp, sizeof resp)) { |
| 656 | ret = -EFAULT; |
| 657 | goto err_list; |
| 658 | } |
| 659 | |
| 660 | return in_len; |
| 661 | |
| 662 | err_list: |
| 663 | spin_lock_irq(&file->ucontext->lock); |
| 664 | list_del(&uobj->list); |
| 665 | spin_unlock_irq(&file->ucontext->lock); |
| 666 | |
| 667 | down(&ib_uverbs_idr_mutex); |
| 668 | idr_remove(&ib_uverbs_cq_idr, uobj->id); |
| 669 | up(&ib_uverbs_idr_mutex); |
| 670 | |
| 671 | err_cq: |
| 672 | ib_destroy_cq(cq); |
| 673 | |
| 674 | err: |
| 675 | kfree(uobj); |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, |
| 680 | const char __user *buf, int in_len, |
| 681 | int out_len) |
| 682 | { |
| 683 | struct ib_uverbs_destroy_cq cmd; |
| 684 | struct ib_cq *cq; |
| 685 | struct ib_uobject *uobj; |
| 686 | int ret = -EINVAL; |
| 687 | |
| 688 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 689 | return -EFAULT; |
| 690 | |
| 691 | down(&ib_uverbs_idr_mutex); |
| 692 | |
| 693 | cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle); |
| 694 | if (!cq || cq->uobject->context != file->ucontext) |
| 695 | goto out; |
| 696 | |
| 697 | uobj = cq->uobject; |
| 698 | |
| 699 | ret = ib_destroy_cq(cq); |
| 700 | if (ret) |
| 701 | goto out; |
| 702 | |
| 703 | idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle); |
| 704 | |
| 705 | spin_lock_irq(&file->ucontext->lock); |
| 706 | list_del(&uobj->list); |
| 707 | spin_unlock_irq(&file->ucontext->lock); |
| 708 | |
| 709 | kfree(uobj); |
| 710 | |
| 711 | out: |
| 712 | up(&ib_uverbs_idr_mutex); |
| 713 | |
| 714 | return ret ? ret : in_len; |
| 715 | } |
| 716 | |
| 717 | ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, |
| 718 | const char __user *buf, int in_len, |
| 719 | int out_len) |
| 720 | { |
| 721 | struct ib_uverbs_create_qp cmd; |
| 722 | struct ib_uverbs_create_qp_resp resp; |
| 723 | struct ib_udata udata; |
| 724 | struct ib_uobject *uobj; |
| 725 | struct ib_pd *pd; |
| 726 | struct ib_cq *scq, *rcq; |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 727 | struct ib_srq *srq; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 728 | struct ib_qp *qp; |
| 729 | struct ib_qp_init_attr attr; |
| 730 | int ret; |
| 731 | |
| 732 | if (out_len < sizeof resp) |
| 733 | return -ENOSPC; |
| 734 | |
| 735 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 736 | return -EFAULT; |
| 737 | |
| 738 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 739 | (unsigned long) cmd.response + sizeof resp, |
| 740 | in_len - sizeof cmd, out_len - sizeof resp); |
| 741 | |
| 742 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 743 | if (!uobj) |
| 744 | return -ENOMEM; |
| 745 | |
| 746 | down(&ib_uverbs_idr_mutex); |
| 747 | |
| 748 | pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); |
| 749 | scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle); |
| 750 | rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle); |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 751 | srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 752 | |
| 753 | if (!pd || pd->uobject->context != file->ucontext || |
| 754 | !scq || scq->uobject->context != file->ucontext || |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 755 | !rcq || rcq->uobject->context != file->ucontext || |
| 756 | (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) { |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 757 | ret = -EINVAL; |
| 758 | goto err_up; |
| 759 | } |
| 760 | |
| 761 | attr.event_handler = ib_uverbs_qp_event_handler; |
| 762 | attr.qp_context = file; |
| 763 | attr.send_cq = scq; |
| 764 | attr.recv_cq = rcq; |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 765 | attr.srq = srq; |
Roland Dreier | bc38a6a | 2005-07-07 17:57:13 -0700 | [diff] [blame] | 766 | attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; |
| 767 | attr.qp_type = cmd.qp_type; |
| 768 | |
| 769 | attr.cap.max_send_wr = cmd.max_send_wr; |
| 770 | attr.cap.max_recv_wr = cmd.max_recv_wr; |
| 771 | attr.cap.max_send_sge = cmd.max_send_sge; |
| 772 | attr.cap.max_recv_sge = cmd.max_recv_sge; |
| 773 | attr.cap.max_inline_data = cmd.max_inline_data; |
| 774 | |
| 775 | uobj->user_handle = cmd.user_handle; |
| 776 | uobj->context = file->ucontext; |
| 777 | |
| 778 | qp = pd->device->create_qp(pd, &attr, &udata); |
| 779 | if (IS_ERR(qp)) { |
| 780 | ret = PTR_ERR(qp); |
| 781 | goto err_up; |
| 782 | } |
| 783 | |
| 784 | qp->device = pd->device; |
| 785 | qp->pd = pd; |
| 786 | qp->send_cq = attr.send_cq; |
| 787 | qp->recv_cq = attr.recv_cq; |
| 788 | qp->srq = attr.srq; |
| 789 | qp->uobject = uobj; |
| 790 | qp->event_handler = attr.event_handler; |
| 791 | qp->qp_context = attr.qp_context; |
| 792 | qp->qp_type = attr.qp_type; |
| 793 | atomic_inc(&pd->usecnt); |
| 794 | atomic_inc(&attr.send_cq->usecnt); |
| 795 | atomic_inc(&attr.recv_cq->usecnt); |
| 796 | if (attr.srq) |
| 797 | atomic_inc(&attr.srq->usecnt); |
| 798 | |
| 799 | memset(&resp, 0, sizeof resp); |
| 800 | resp.qpn = qp->qp_num; |
| 801 | |
| 802 | retry: |
| 803 | if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) { |
| 804 | ret = -ENOMEM; |
| 805 | goto err_destroy; |
| 806 | } |
| 807 | |
| 808 | ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->id); |
| 809 | |
| 810 | if (ret == -EAGAIN) |
| 811 | goto retry; |
| 812 | if (ret) |
| 813 | goto err_destroy; |
| 814 | |
| 815 | resp.qp_handle = uobj->id; |
| 816 | |
| 817 | spin_lock_irq(&file->ucontext->lock); |
| 818 | list_add_tail(&uobj->list, &file->ucontext->qp_list); |
| 819 | spin_unlock_irq(&file->ucontext->lock); |
| 820 | |
| 821 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 822 | &resp, sizeof resp)) { |
| 823 | ret = -EFAULT; |
| 824 | goto err_list; |
| 825 | } |
| 826 | |
| 827 | up(&ib_uverbs_idr_mutex); |
| 828 | |
| 829 | return in_len; |
| 830 | |
| 831 | err_list: |
| 832 | spin_lock_irq(&file->ucontext->lock); |
| 833 | list_del(&uobj->list); |
| 834 | spin_unlock_irq(&file->ucontext->lock); |
| 835 | |
| 836 | err_destroy: |
| 837 | ib_destroy_qp(qp); |
| 838 | |
| 839 | err_up: |
| 840 | up(&ib_uverbs_idr_mutex); |
| 841 | |
| 842 | kfree(uobj); |
| 843 | return ret; |
| 844 | } |
| 845 | |
| 846 | ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file, |
| 847 | const char __user *buf, int in_len, |
| 848 | int out_len) |
| 849 | { |
| 850 | struct ib_uverbs_modify_qp cmd; |
| 851 | struct ib_qp *qp; |
| 852 | struct ib_qp_attr *attr; |
| 853 | int ret; |
| 854 | |
| 855 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 856 | return -EFAULT; |
| 857 | |
| 858 | attr = kmalloc(sizeof *attr, GFP_KERNEL); |
| 859 | if (!attr) |
| 860 | return -ENOMEM; |
| 861 | |
| 862 | down(&ib_uverbs_idr_mutex); |
| 863 | |
| 864 | qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); |
| 865 | if (!qp || qp->uobject->context != file->ucontext) { |
| 866 | ret = -EINVAL; |
| 867 | goto out; |
| 868 | } |
| 869 | |
| 870 | attr->qp_state = cmd.qp_state; |
| 871 | attr->cur_qp_state = cmd.cur_qp_state; |
| 872 | attr->path_mtu = cmd.path_mtu; |
| 873 | attr->path_mig_state = cmd.path_mig_state; |
| 874 | attr->qkey = cmd.qkey; |
| 875 | attr->rq_psn = cmd.rq_psn; |
| 876 | attr->sq_psn = cmd.sq_psn; |
| 877 | attr->dest_qp_num = cmd.dest_qp_num; |
| 878 | attr->qp_access_flags = cmd.qp_access_flags; |
| 879 | attr->pkey_index = cmd.pkey_index; |
| 880 | attr->alt_pkey_index = cmd.pkey_index; |
| 881 | attr->en_sqd_async_notify = cmd.en_sqd_async_notify; |
| 882 | attr->max_rd_atomic = cmd.max_rd_atomic; |
| 883 | attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic; |
| 884 | attr->min_rnr_timer = cmd.min_rnr_timer; |
| 885 | attr->port_num = cmd.port_num; |
| 886 | attr->timeout = cmd.timeout; |
| 887 | attr->retry_cnt = cmd.retry_cnt; |
| 888 | attr->rnr_retry = cmd.rnr_retry; |
| 889 | attr->alt_port_num = cmd.alt_port_num; |
| 890 | attr->alt_timeout = cmd.alt_timeout; |
| 891 | |
| 892 | memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16); |
| 893 | attr->ah_attr.grh.flow_label = cmd.dest.flow_label; |
| 894 | attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index; |
| 895 | attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit; |
| 896 | attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class; |
| 897 | attr->ah_attr.dlid = cmd.dest.dlid; |
| 898 | attr->ah_attr.sl = cmd.dest.sl; |
| 899 | attr->ah_attr.src_path_bits = cmd.dest.src_path_bits; |
| 900 | attr->ah_attr.static_rate = cmd.dest.static_rate; |
| 901 | attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0; |
| 902 | attr->ah_attr.port_num = cmd.dest.port_num; |
| 903 | |
| 904 | memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16); |
| 905 | attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label; |
| 906 | attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index; |
| 907 | attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit; |
| 908 | attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class; |
| 909 | attr->alt_ah_attr.dlid = cmd.alt_dest.dlid; |
| 910 | attr->alt_ah_attr.sl = cmd.alt_dest.sl; |
| 911 | attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits; |
| 912 | attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate; |
| 913 | attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0; |
| 914 | attr->alt_ah_attr.port_num = cmd.alt_dest.port_num; |
| 915 | |
| 916 | ret = ib_modify_qp(qp, attr, cmd.attr_mask); |
| 917 | if (ret) |
| 918 | goto out; |
| 919 | |
| 920 | ret = in_len; |
| 921 | |
| 922 | out: |
| 923 | up(&ib_uverbs_idr_mutex); |
| 924 | kfree(attr); |
| 925 | |
| 926 | return ret; |
| 927 | } |
| 928 | |
| 929 | ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, |
| 930 | const char __user *buf, int in_len, |
| 931 | int out_len) |
| 932 | { |
| 933 | struct ib_uverbs_destroy_qp cmd; |
| 934 | struct ib_qp *qp; |
| 935 | struct ib_uobject *uobj; |
| 936 | int ret = -EINVAL; |
| 937 | |
| 938 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 939 | return -EFAULT; |
| 940 | |
| 941 | down(&ib_uverbs_idr_mutex); |
| 942 | |
| 943 | qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); |
| 944 | if (!qp || qp->uobject->context != file->ucontext) |
| 945 | goto out; |
| 946 | |
| 947 | uobj = qp->uobject; |
| 948 | |
| 949 | ret = ib_destroy_qp(qp); |
| 950 | if (ret) |
| 951 | goto out; |
| 952 | |
| 953 | idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle); |
| 954 | |
| 955 | spin_lock_irq(&file->ucontext->lock); |
| 956 | list_del(&uobj->list); |
| 957 | spin_unlock_irq(&file->ucontext->lock); |
| 958 | |
| 959 | kfree(uobj); |
| 960 | |
| 961 | out: |
| 962 | up(&ib_uverbs_idr_mutex); |
| 963 | |
| 964 | return ret ? ret : in_len; |
| 965 | } |
| 966 | |
| 967 | ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, |
| 968 | const char __user *buf, int in_len, |
| 969 | int out_len) |
| 970 | { |
| 971 | struct ib_uverbs_attach_mcast cmd; |
| 972 | struct ib_qp *qp; |
| 973 | int ret = -EINVAL; |
| 974 | |
| 975 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 976 | return -EFAULT; |
| 977 | |
| 978 | down(&ib_uverbs_idr_mutex); |
| 979 | |
| 980 | qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); |
| 981 | if (qp && qp->uobject->context == file->ucontext) |
| 982 | ret = ib_attach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); |
| 983 | |
| 984 | up(&ib_uverbs_idr_mutex); |
| 985 | |
| 986 | return ret ? ret : in_len; |
| 987 | } |
| 988 | |
| 989 | ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, |
| 990 | const char __user *buf, int in_len, |
| 991 | int out_len) |
| 992 | { |
| 993 | struct ib_uverbs_detach_mcast cmd; |
| 994 | struct ib_qp *qp; |
| 995 | int ret = -EINVAL; |
| 996 | |
| 997 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 998 | return -EFAULT; |
| 999 | |
| 1000 | down(&ib_uverbs_idr_mutex); |
| 1001 | |
| 1002 | qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); |
| 1003 | if (qp && qp->uobject->context == file->ucontext) |
| 1004 | ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); |
| 1005 | |
| 1006 | up(&ib_uverbs_idr_mutex); |
| 1007 | |
| 1008 | return ret ? ret : in_len; |
| 1009 | } |
Roland Dreier | f520ba5 | 2005-08-18 12:24:13 -0700 | [diff] [blame] | 1010 | |
| 1011 | ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file, |
| 1012 | const char __user *buf, int in_len, |
| 1013 | int out_len) |
| 1014 | { |
| 1015 | struct ib_uverbs_create_srq cmd; |
| 1016 | struct ib_uverbs_create_srq_resp resp; |
| 1017 | struct ib_udata udata; |
| 1018 | struct ib_uobject *uobj; |
| 1019 | struct ib_pd *pd; |
| 1020 | struct ib_srq *srq; |
| 1021 | struct ib_srq_init_attr attr; |
| 1022 | int ret; |
| 1023 | |
| 1024 | if (out_len < sizeof resp) |
| 1025 | return -ENOSPC; |
| 1026 | |
| 1027 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1028 | return -EFAULT; |
| 1029 | |
| 1030 | INIT_UDATA(&udata, buf + sizeof cmd, |
| 1031 | (unsigned long) cmd.response + sizeof resp, |
| 1032 | in_len - sizeof cmd, out_len - sizeof resp); |
| 1033 | |
| 1034 | uobj = kmalloc(sizeof *uobj, GFP_KERNEL); |
| 1035 | if (!uobj) |
| 1036 | return -ENOMEM; |
| 1037 | |
| 1038 | down(&ib_uverbs_idr_mutex); |
| 1039 | |
| 1040 | pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); |
| 1041 | |
| 1042 | if (!pd || pd->uobject->context != file->ucontext) { |
| 1043 | ret = -EINVAL; |
| 1044 | goto err_up; |
| 1045 | } |
| 1046 | |
| 1047 | attr.event_handler = ib_uverbs_srq_event_handler; |
| 1048 | attr.srq_context = file; |
| 1049 | attr.attr.max_wr = cmd.max_wr; |
| 1050 | attr.attr.max_sge = cmd.max_sge; |
| 1051 | attr.attr.srq_limit = cmd.srq_limit; |
| 1052 | |
| 1053 | uobj->user_handle = cmd.user_handle; |
| 1054 | uobj->context = file->ucontext; |
| 1055 | |
| 1056 | srq = pd->device->create_srq(pd, &attr, &udata); |
| 1057 | if (IS_ERR(srq)) { |
| 1058 | ret = PTR_ERR(srq); |
| 1059 | goto err_up; |
| 1060 | } |
| 1061 | |
| 1062 | srq->device = pd->device; |
| 1063 | srq->pd = pd; |
| 1064 | srq->uobject = uobj; |
| 1065 | srq->event_handler = attr.event_handler; |
| 1066 | srq->srq_context = attr.srq_context; |
| 1067 | atomic_inc(&pd->usecnt); |
| 1068 | atomic_set(&srq->usecnt, 0); |
| 1069 | |
| 1070 | memset(&resp, 0, sizeof resp); |
| 1071 | |
| 1072 | retry: |
| 1073 | if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) { |
| 1074 | ret = -ENOMEM; |
| 1075 | goto err_destroy; |
| 1076 | } |
| 1077 | |
| 1078 | ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->id); |
| 1079 | |
| 1080 | if (ret == -EAGAIN) |
| 1081 | goto retry; |
| 1082 | if (ret) |
| 1083 | goto err_destroy; |
| 1084 | |
| 1085 | resp.srq_handle = uobj->id; |
| 1086 | |
| 1087 | spin_lock_irq(&file->ucontext->lock); |
| 1088 | list_add_tail(&uobj->list, &file->ucontext->srq_list); |
| 1089 | spin_unlock_irq(&file->ucontext->lock); |
| 1090 | |
| 1091 | if (copy_to_user((void __user *) (unsigned long) cmd.response, |
| 1092 | &resp, sizeof resp)) { |
| 1093 | ret = -EFAULT; |
| 1094 | goto err_list; |
| 1095 | } |
| 1096 | |
| 1097 | up(&ib_uverbs_idr_mutex); |
| 1098 | |
| 1099 | return in_len; |
| 1100 | |
| 1101 | err_list: |
| 1102 | spin_lock_irq(&file->ucontext->lock); |
| 1103 | list_del(&uobj->list); |
| 1104 | spin_unlock_irq(&file->ucontext->lock); |
| 1105 | |
| 1106 | err_destroy: |
| 1107 | ib_destroy_srq(srq); |
| 1108 | |
| 1109 | err_up: |
| 1110 | up(&ib_uverbs_idr_mutex); |
| 1111 | |
| 1112 | kfree(uobj); |
| 1113 | return ret; |
| 1114 | } |
| 1115 | |
| 1116 | ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, |
| 1117 | const char __user *buf, int in_len, |
| 1118 | int out_len) |
| 1119 | { |
| 1120 | struct ib_uverbs_modify_srq cmd; |
| 1121 | struct ib_srq *srq; |
| 1122 | struct ib_srq_attr attr; |
| 1123 | int ret; |
| 1124 | |
| 1125 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1126 | return -EFAULT; |
| 1127 | |
| 1128 | down(&ib_uverbs_idr_mutex); |
| 1129 | |
| 1130 | srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle); |
| 1131 | if (!srq || srq->uobject->context != file->ucontext) { |
| 1132 | ret = -EINVAL; |
| 1133 | goto out; |
| 1134 | } |
| 1135 | |
| 1136 | attr.max_wr = cmd.max_wr; |
| 1137 | attr.max_sge = cmd.max_sge; |
| 1138 | attr.srq_limit = cmd.srq_limit; |
| 1139 | |
| 1140 | ret = ib_modify_srq(srq, &attr, cmd.attr_mask); |
| 1141 | |
| 1142 | out: |
| 1143 | up(&ib_uverbs_idr_mutex); |
| 1144 | |
| 1145 | return ret ? ret : in_len; |
| 1146 | } |
| 1147 | |
| 1148 | ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, |
| 1149 | const char __user *buf, int in_len, |
| 1150 | int out_len) |
| 1151 | { |
| 1152 | struct ib_uverbs_destroy_srq cmd; |
| 1153 | struct ib_srq *srq; |
| 1154 | struct ib_uobject *uobj; |
| 1155 | int ret = -EINVAL; |
| 1156 | |
| 1157 | if (copy_from_user(&cmd, buf, sizeof cmd)) |
| 1158 | return -EFAULT; |
| 1159 | |
| 1160 | down(&ib_uverbs_idr_mutex); |
| 1161 | |
| 1162 | srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle); |
| 1163 | if (!srq || srq->uobject->context != file->ucontext) |
| 1164 | goto out; |
| 1165 | |
| 1166 | uobj = srq->uobject; |
| 1167 | |
| 1168 | ret = ib_destroy_srq(srq); |
| 1169 | if (ret) |
| 1170 | goto out; |
| 1171 | |
| 1172 | idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle); |
| 1173 | |
| 1174 | spin_lock_irq(&file->ucontext->lock); |
| 1175 | list_del(&uobj->list); |
| 1176 | spin_unlock_irq(&file->ucontext->lock); |
| 1177 | |
| 1178 | kfree(uobj); |
| 1179 | |
| 1180 | out: |
| 1181 | up(&ib_uverbs_idr_mutex); |
| 1182 | |
| 1183 | return ret ? ret : in_len; |
| 1184 | } |