1 /* 2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 4 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. 5 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 6 * Copyright (c) 2004 Voltaire, Inc. All rights reserved. 7 * 8 * This software is available to you under a choice of one of two 9 * licenses. You may choose to be licensed under the terms of the GNU 10 * General Public License (GPL) Version 2, available from the file 11 * COPYING in the main directory of this source tree, or the 12 * OpenIB.org BSD license below: 13 * 14 * Redistribution and use in source and binary forms, with or 15 * without modification, are permitted provided that the following 16 * conditions are met: 17 * 18 * - Redistributions of source code must retain the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer. 21 * 22 * - Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials 25 * provided with the distribution. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 34 * SOFTWARE. 35 */ 36 37 #include <rdma/ib_smi.h> 38 #include <rdma/ib_user_verbs.h> 39 #include <rdma/iter.h> 40 #include <rdma/uverbs_ioctl.h> 41 42 #include <linux/sched.h> 43 #include <linux/slab.h> 44 #include <linux/stat.h> 45 #include <linux/mm.h> 46 #include <linux/export.h> 47 48 #include "mthca_dev.h" 49 #include "mthca_cmd.h" 50 #include <rdma/mthca-abi.h> 51 #include "mthca_memfree.h" 52 53 static int mthca_query_device(struct ib_device *ibdev, struct ib_device_attr *props, 54 struct ib_udata *uhw) 55 { 56 struct ib_smp *in_mad; 57 struct ib_smp *out_mad; 58 int err = -ENOMEM; 59 struct mthca_dev *mdev = to_mdev(ibdev); 60 61 if (uhw->inlen || uhw->outlen) 62 return -EINVAL; 63 64 in_mad = kzalloc_obj(*in_mad); 65 out_mad = kmalloc_obj(*out_mad); 66 if (!in_mad || !out_mad) 67 goto out; 68 69 memset(props, 0, sizeof *props); 70 71 props->fw_ver = mdev->fw_ver; 72 73 ib_init_query_mad(in_mad); 74 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; 75 76 err = mthca_MAD_IFC(mdev, 1, 1, 77 1, NULL, NULL, in_mad, out_mad); 78 if (err) 79 goto out; 80 81 props->device_cap_flags = mdev->device_cap_flags; 82 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) & 83 0xffffff; 84 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30)); 85 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32)); 86 memcpy(&props->sys_image_guid, out_mad->data + 4, 8); 87 88 props->max_mr_size = ~0ull; 89 props->page_size_cap = mdev->limits.page_size_cap; 90 props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps; 91 props->max_qp_wr = mdev->limits.max_wqes; 92 props->max_send_sge = mdev->limits.max_sg; 93 props->max_recv_sge = mdev->limits.max_sg; 94 props->max_sge_rd = mdev->limits.max_sg; 95 props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs; 96 props->max_cqe = mdev->limits.max_cqes; 97 props->max_mr = mdev->limits.num_mpts - mdev->limits.reserved_mrws; 98 props->max_pd = mdev->limits.num_pds - mdev->limits.reserved_pds; 99 props->max_qp_rd_atom = 1 << mdev->qp_table.rdb_shift; 100 props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma; 101 props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp; 102 props->max_srq = mdev->limits.num_srqs - mdev->limits.reserved_srqs; 103 props->max_srq_wr = mdev->limits.max_srq_wqes; 104 props->max_srq_sge = mdev->limits.max_srq_sge; 105 props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay; 106 props->atomic_cap = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ? 107 IB_ATOMIC_HCA : IB_ATOMIC_NONE; 108 props->max_pkeys = mdev->limits.pkey_table_len; 109 props->max_mcast_grp = mdev->limits.num_mgms + mdev->limits.num_amgms; 110 props->max_mcast_qp_attach = MTHCA_QP_PER_MGM; 111 props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * 112 props->max_mcast_grp; 113 114 err = 0; 115 out: 116 kfree(in_mad); 117 kfree(out_mad); 118 return err; 119 } 120 121 static int mthca_query_port(struct ib_device *ibdev, 122 u32 port, struct ib_port_attr *props) 123 { 124 struct ib_smp *in_mad; 125 struct ib_smp *out_mad; 126 int err = -ENOMEM; 127 128 in_mad = kzalloc_obj(*in_mad); 129 out_mad = kmalloc_obj(*out_mad); 130 if (!in_mad || !out_mad) 131 goto out; 132 133 /* props being zeroed by the caller, avoid zeroing it here */ 134 135 ib_init_query_mad(in_mad); 136 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; 137 in_mad->attr_mod = cpu_to_be32(port); 138 139 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 140 port, NULL, NULL, in_mad, out_mad); 141 if (err) 142 goto out; 143 144 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16)); 145 props->lmc = out_mad->data[34] & 0x7; 146 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18)); 147 props->sm_sl = out_mad->data[36] & 0xf; 148 props->state = out_mad->data[32] & 0xf; 149 props->phys_state = out_mad->data[33] >> 4; 150 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20)); 151 props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len; 152 props->max_msg_sz = 0x80000000; 153 props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len; 154 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46)); 155 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48)); 156 props->active_width = out_mad->data[31] & 0xf; 157 props->active_speed = out_mad->data[35] >> 4; 158 props->max_mtu = out_mad->data[41] & 0xf; 159 props->active_mtu = out_mad->data[36] >> 4; 160 props->subnet_timeout = out_mad->data[51] & 0x1f; 161 props->max_vl_num = out_mad->data[37] >> 4; 162 props->init_type_reply = out_mad->data[41] >> 4; 163 164 out: 165 kfree(in_mad); 166 kfree(out_mad); 167 return err; 168 } 169 170 static int mthca_modify_device(struct ib_device *ibdev, 171 int mask, 172 struct ib_device_modify *props) 173 { 174 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC) 175 return -EOPNOTSUPP; 176 177 if (mask & IB_DEVICE_MODIFY_NODE_DESC) { 178 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex)) 179 return -ERESTARTSYS; 180 memcpy(ibdev->node_desc, props->node_desc, 181 IB_DEVICE_NODE_DESC_MAX); 182 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex); 183 } 184 185 return 0; 186 } 187 188 static int mthca_modify_port(struct ib_device *ibdev, 189 u32 port, int port_modify_mask, 190 struct ib_port_modify *props) 191 { 192 struct mthca_set_ib_param set_ib; 193 struct ib_port_attr attr; 194 int err; 195 196 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex)) 197 return -ERESTARTSYS; 198 199 err = ib_query_port(ibdev, port, &attr); 200 if (err) 201 goto out; 202 203 set_ib.set_si_guid = 0; 204 set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR); 205 206 set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) & 207 ~props->clr_port_cap_mask; 208 209 err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port); 210 if (err) 211 goto out; 212 out: 213 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex); 214 return err; 215 } 216 217 static int mthca_query_pkey(struct ib_device *ibdev, 218 u32 port, u16 index, u16 *pkey) 219 { 220 struct ib_smp *in_mad; 221 struct ib_smp *out_mad; 222 int err = -ENOMEM; 223 224 in_mad = kzalloc_obj(*in_mad); 225 out_mad = kmalloc_obj(*out_mad); 226 if (!in_mad || !out_mad) 227 goto out; 228 229 ib_init_query_mad(in_mad); 230 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE; 231 in_mad->attr_mod = cpu_to_be32(index / 32); 232 233 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 234 port, NULL, NULL, in_mad, out_mad); 235 if (err) 236 goto out; 237 238 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]); 239 240 out: 241 kfree(in_mad); 242 kfree(out_mad); 243 return err; 244 } 245 246 static int mthca_query_gid(struct ib_device *ibdev, u32 port, 247 int index, union ib_gid *gid) 248 { 249 struct ib_smp *in_mad; 250 struct ib_smp *out_mad; 251 int err = -ENOMEM; 252 253 in_mad = kzalloc_obj(*in_mad); 254 out_mad = kmalloc_obj(*out_mad); 255 if (!in_mad || !out_mad) 256 goto out; 257 258 ib_init_query_mad(in_mad); 259 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; 260 in_mad->attr_mod = cpu_to_be32(port); 261 262 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 263 port, NULL, NULL, in_mad, out_mad); 264 if (err) 265 goto out; 266 267 memcpy(gid->raw, out_mad->data + 8, 8); 268 269 ib_init_query_mad(in_mad); 270 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; 271 in_mad->attr_mod = cpu_to_be32(index / 8); 272 273 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 274 port, NULL, NULL, in_mad, out_mad); 275 if (err) 276 goto out; 277 278 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8); 279 280 out: 281 kfree(in_mad); 282 kfree(out_mad); 283 return err; 284 } 285 286 static int mthca_alloc_ucontext(struct ib_ucontext *uctx, 287 struct ib_udata *udata) 288 { 289 struct ib_device *ibdev = uctx->device; 290 struct mthca_alloc_ucontext_resp uresp = {}; 291 struct mthca_ucontext *context = to_mucontext(uctx); 292 int err; 293 294 if (!(to_mdev(ibdev)->active)) 295 return -EAGAIN; 296 297 uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps; 298 if (mthca_is_memfree(to_mdev(ibdev))) 299 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size; 300 else 301 uresp.uarc_size = 0; 302 303 err = mthca_uar_alloc(to_mdev(ibdev), &context->uar); 304 if (err) 305 return err; 306 307 context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev)); 308 if (IS_ERR(context->db_tab)) { 309 err = PTR_ERR(context->db_tab); 310 mthca_uar_free(to_mdev(ibdev), &context->uar); 311 return err; 312 } 313 314 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) { 315 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab); 316 mthca_uar_free(to_mdev(ibdev), &context->uar); 317 return -EFAULT; 318 } 319 320 context->reg_mr_warned = 0; 321 322 return 0; 323 } 324 325 static void mthca_dealloc_ucontext(struct ib_ucontext *context) 326 { 327 mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar, 328 to_mucontext(context)->db_tab); 329 mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar); 330 } 331 332 static int mthca_mmap_uar(struct ib_ucontext *context, 333 struct vm_area_struct *vma) 334 { 335 if (vma->vm_end - vma->vm_start != PAGE_SIZE) 336 return -EINVAL; 337 338 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 339 340 if (io_remap_pfn_range(vma, vma->vm_start, 341 to_mucontext(context)->uar.pfn, 342 PAGE_SIZE, vma->vm_page_prot)) 343 return -EAGAIN; 344 345 return 0; 346 } 347 348 static int mthca_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 349 { 350 struct ib_device *ibdev = ibpd->device; 351 struct mthca_pd *pd = to_mpd(ibpd); 352 int err; 353 354 err = mthca_pd_alloc(to_mdev(ibdev), !udata, pd); 355 if (err) 356 return err; 357 358 if (udata) { 359 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) { 360 mthca_pd_free(to_mdev(ibdev), pd); 361 return -EFAULT; 362 } 363 } 364 365 return 0; 366 } 367 368 static int mthca_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) 369 { 370 mthca_pd_free(to_mdev(pd->device), to_mpd(pd)); 371 return 0; 372 } 373 374 static int mthca_ah_create(struct ib_ah *ibah, 375 struct rdma_ah_init_attr *init_attr, 376 struct ib_udata *udata) 377 378 { 379 struct mthca_ah *ah = to_mah(ibah); 380 381 return mthca_create_ah(to_mdev(ibah->device), to_mpd(ibah->pd), 382 init_attr->ah_attr, ah); 383 } 384 385 static int mthca_ah_destroy(struct ib_ah *ah, u32 flags) 386 { 387 mthca_destroy_ah(to_mdev(ah->device), to_mah(ah)); 388 return 0; 389 } 390 391 static int mthca_create_srq(struct ib_srq *ibsrq, 392 struct ib_srq_init_attr *init_attr, 393 struct ib_udata *udata) 394 { 395 struct mthca_create_srq ucmd; 396 struct mthca_ucontext *context = rdma_udata_to_drv_context( 397 udata, struct mthca_ucontext, ibucontext); 398 struct mthca_srq *srq = to_msrq(ibsrq); 399 int err; 400 401 if (init_attr->srq_type != IB_SRQT_BASIC) 402 return -EOPNOTSUPP; 403 404 if (udata) { 405 err = ib_copy_validate_udata_in(udata, ucmd, db_page); 406 if (err) 407 return err; 408 409 err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar, 410 context->db_tab, ucmd.db_index, 411 ucmd.db_page); 412 413 if (err) 414 return err; 415 416 srq->mr.ibmr.lkey = ucmd.lkey; 417 srq->db_index = ucmd.db_index; 418 } 419 420 err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd), 421 &init_attr->attr, srq, udata); 422 423 if (err && udata) 424 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar, 425 context->db_tab, ucmd.db_index); 426 427 if (err) 428 return err; 429 430 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) { 431 mthca_free_srq(to_mdev(ibsrq->device), srq); 432 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar, 433 context->db_tab, ucmd.db_index); 434 return -EFAULT; 435 } 436 437 return 0; 438 } 439 440 static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata) 441 { 442 mthca_free_srq(to_mdev(srq->device), to_msrq(srq)); 443 if (udata) { 444 struct mthca_ucontext *context = 445 rdma_udata_to_drv_context( 446 udata, 447 struct mthca_ucontext, 448 ibucontext); 449 450 mthca_unmap_user_db(to_mdev(srq->device), &context->uar, 451 context->db_tab, to_msrq(srq)->db_index); 452 } 453 return 0; 454 } 455 456 static int mthca_create_qp(struct ib_qp *ibqp, 457 struct ib_qp_init_attr *init_attr, 458 struct ib_udata *udata) 459 { 460 struct mthca_ucontext *context = rdma_udata_to_drv_context( 461 udata, struct mthca_ucontext, ibucontext); 462 struct mthca_create_qp ucmd; 463 struct mthca_qp *qp = to_mqp(ibqp); 464 struct mthca_dev *dev = to_mdev(ibqp->device); 465 int err; 466 467 if (init_attr->create_flags) 468 return -EOPNOTSUPP; 469 470 switch (init_attr->qp_type) { 471 case IB_QPT_RC: 472 case IB_QPT_UC: 473 case IB_QPT_UD: 474 { 475 if (udata) { 476 err = ib_copy_validate_udata_in(udata, ucmd, rq_db_index); 477 if (err) 478 return err; 479 480 err = mthca_map_user_db(dev, &context->uar, 481 context->db_tab, 482 ucmd.sq_db_index, 483 ucmd.sq_db_page); 484 if (err) 485 return err; 486 487 err = mthca_map_user_db(dev, &context->uar, 488 context->db_tab, 489 ucmd.rq_db_index, 490 ucmd.rq_db_page); 491 if (err) { 492 mthca_unmap_user_db(dev, &context->uar, 493 context->db_tab, 494 ucmd.sq_db_index); 495 return err; 496 } 497 498 qp->mr.ibmr.lkey = ucmd.lkey; 499 qp->sq.db_index = ucmd.sq_db_index; 500 qp->rq.db_index = ucmd.rq_db_index; 501 } 502 503 err = mthca_alloc_qp(dev, to_mpd(ibqp->pd), 504 to_mcq(init_attr->send_cq), 505 to_mcq(init_attr->recv_cq), 506 init_attr->qp_type, init_attr->sq_sig_type, 507 &init_attr->cap, qp, udata); 508 509 if (err && udata) { 510 mthca_unmap_user_db(dev, &context->uar, context->db_tab, 511 ucmd.sq_db_index); 512 mthca_unmap_user_db(dev, &context->uar, context->db_tab, 513 ucmd.rq_db_index); 514 } 515 516 qp->ibqp.qp_num = qp->qpn; 517 break; 518 } 519 case IB_QPT_SMI: 520 case IB_QPT_GSI: 521 { 522 qp->sqp = kzalloc_obj(struct mthca_sqp); 523 if (!qp->sqp) 524 return -ENOMEM; 525 526 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; 527 528 err = mthca_alloc_sqp(dev, to_mpd(ibqp->pd), 529 to_mcq(init_attr->send_cq), 530 to_mcq(init_attr->recv_cq), 531 init_attr->sq_sig_type, &init_attr->cap, 532 qp->ibqp.qp_num, init_attr->port_num, qp, 533 udata); 534 break; 535 } 536 default: 537 /* Don't support raw QPs */ 538 return -EOPNOTSUPP; 539 } 540 541 if (err) { 542 kfree(qp->sqp); 543 return err; 544 } 545 546 init_attr->cap.max_send_wr = qp->sq.max; 547 init_attr->cap.max_recv_wr = qp->rq.max; 548 init_attr->cap.max_send_sge = qp->sq.max_gs; 549 init_attr->cap.max_recv_sge = qp->rq.max_gs; 550 init_attr->cap.max_inline_data = qp->max_inline_data; 551 552 return 0; 553 } 554 555 static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 556 { 557 if (udata) { 558 struct mthca_ucontext *context = 559 rdma_udata_to_drv_context( 560 udata, 561 struct mthca_ucontext, 562 ibucontext); 563 564 mthca_unmap_user_db(to_mdev(qp->device), 565 &context->uar, 566 context->db_tab, 567 to_mqp(qp)->sq.db_index); 568 mthca_unmap_user_db(to_mdev(qp->device), 569 &context->uar, 570 context->db_tab, 571 to_mqp(qp)->rq.db_index); 572 } 573 mthca_free_qp(to_mdev(qp->device), to_mqp(qp)); 574 kfree(to_mqp(qp)->sqp); 575 return 0; 576 } 577 578 static int mthca_create_cq(struct ib_cq *ibcq, 579 const struct ib_cq_init_attr *attr, 580 struct uverbs_attr_bundle *attrs) 581 { 582 struct ib_udata *udata = &attrs->driver_udata; 583 struct ib_device *ibdev = ibcq->device; 584 int entries = attr->cqe; 585 struct mthca_create_cq ucmd; 586 struct mthca_cq *cq; 587 int nent; 588 int err; 589 struct mthca_ucontext *context = rdma_udata_to_drv_context( 590 udata, struct mthca_ucontext, ibucontext); 591 592 if (attr->flags) 593 return -EOPNOTSUPP; 594 595 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes) 596 return -EINVAL; 597 598 if (udata) { 599 err = ib_copy_validate_udata_in(udata, ucmd, set_db_index); 600 if (err) 601 return err; 602 603 err = mthca_map_user_db(to_mdev(ibdev), &context->uar, 604 context->db_tab, ucmd.set_db_index, 605 ucmd.set_db_page); 606 if (err) 607 return err; 608 609 err = mthca_map_user_db(to_mdev(ibdev), &context->uar, 610 context->db_tab, ucmd.arm_db_index, 611 ucmd.arm_db_page); 612 if (err) 613 goto err_unmap_set; 614 } 615 616 cq = to_mcq(ibcq); 617 618 if (udata) { 619 cq->buf.mr.ibmr.lkey = ucmd.lkey; 620 cq->set_ci_db_index = ucmd.set_db_index; 621 cq->arm_db_index = ucmd.arm_db_index; 622 } 623 624 for (nent = 1; nent <= entries; nent <<= 1) 625 ; /* nothing */ 626 627 err = mthca_init_cq(to_mdev(ibdev), nent, context, 628 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num, 629 cq); 630 if (err) 631 goto err_unmap_arm; 632 633 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) { 634 mthca_free_cq(to_mdev(ibdev), cq); 635 err = -EFAULT; 636 goto err_unmap_arm; 637 } 638 639 cq->resize_buf = NULL; 640 641 return 0; 642 643 err_unmap_arm: 644 if (udata) 645 mthca_unmap_user_db(to_mdev(ibdev), &context->uar, 646 context->db_tab, ucmd.arm_db_index); 647 648 err_unmap_set: 649 if (udata) 650 mthca_unmap_user_db(to_mdev(ibdev), &context->uar, 651 context->db_tab, ucmd.set_db_index); 652 653 return err; 654 } 655 656 static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq, 657 int entries) 658 { 659 int ret; 660 661 spin_lock_irq(&cq->lock); 662 if (cq->resize_buf) { 663 ret = -EBUSY; 664 goto unlock; 665 } 666 667 cq->resize_buf = kmalloc_obj(*cq->resize_buf, GFP_ATOMIC); 668 if (!cq->resize_buf) { 669 ret = -ENOMEM; 670 goto unlock; 671 } 672 673 cq->resize_buf->state = CQ_RESIZE_ALLOC; 674 675 ret = 0; 676 677 unlock: 678 spin_unlock_irq(&cq->lock); 679 680 if (ret) 681 return ret; 682 683 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries); 684 if (ret) { 685 spin_lock_irq(&cq->lock); 686 kfree(cq->resize_buf); 687 cq->resize_buf = NULL; 688 spin_unlock_irq(&cq->lock); 689 return ret; 690 } 691 692 cq->resize_buf->cqe = entries - 1; 693 694 spin_lock_irq(&cq->lock); 695 cq->resize_buf->state = CQ_RESIZE_READY; 696 spin_unlock_irq(&cq->lock); 697 698 return 0; 699 } 700 701 static int mthca_resize_cq(struct ib_cq *ibcq, unsigned int entries, 702 struct ib_udata *udata) 703 { 704 struct mthca_dev *dev = to_mdev(ibcq->device); 705 struct mthca_cq *cq = to_mcq(ibcq); 706 struct mthca_resize_cq ucmd; 707 u32 lkey; 708 int ret; 709 710 if (entries > dev->limits.max_cqes) 711 return -EINVAL; 712 713 mutex_lock(&cq->mutex); 714 715 entries = roundup_pow_of_two(entries + 1); 716 if (entries == ibcq->cqe + 1) { 717 ret = 0; 718 goto out; 719 } 720 721 if (cq->is_kernel) { 722 ret = mthca_alloc_resize_buf(dev, cq, entries); 723 if (ret) 724 goto out; 725 lkey = cq->resize_buf->buf.mr.ibmr.lkey; 726 } else { 727 ret = ib_copy_validate_udata_in(udata, ucmd, reserved); 728 if (ret) 729 goto out; 730 lkey = ucmd.lkey; 731 } 732 733 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries)); 734 735 if (ret) { 736 if (cq->resize_buf) { 737 mthca_free_cq_buf(dev, &cq->resize_buf->buf, 738 cq->resize_buf->cqe); 739 kfree(cq->resize_buf); 740 spin_lock_irq(&cq->lock); 741 cq->resize_buf = NULL; 742 spin_unlock_irq(&cq->lock); 743 } 744 goto out; 745 } 746 747 if (cq->is_kernel) { 748 struct mthca_cq_buf tbuf; 749 int tcqe; 750 751 spin_lock_irq(&cq->lock); 752 if (cq->resize_buf->state == CQ_RESIZE_READY) { 753 mthca_cq_resize_copy_cqes(cq); 754 tbuf = cq->buf; 755 tcqe = cq->ibcq.cqe; 756 cq->buf = cq->resize_buf->buf; 757 cq->ibcq.cqe = cq->resize_buf->cqe; 758 } else { 759 tbuf = cq->resize_buf->buf; 760 tcqe = cq->resize_buf->cqe; 761 } 762 763 kfree(cq->resize_buf); 764 cq->resize_buf = NULL; 765 spin_unlock_irq(&cq->lock); 766 767 mthca_free_cq_buf(dev, &tbuf, tcqe); 768 } else 769 ibcq->cqe = entries - 1; 770 771 out: 772 mutex_unlock(&cq->mutex); 773 774 return ret; 775 } 776 777 static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) 778 { 779 if (udata) { 780 struct mthca_ucontext *context = 781 rdma_udata_to_drv_context( 782 udata, 783 struct mthca_ucontext, 784 ibucontext); 785 786 mthca_unmap_user_db(to_mdev(cq->device), 787 &context->uar, 788 context->db_tab, 789 to_mcq(cq)->arm_db_index); 790 mthca_unmap_user_db(to_mdev(cq->device), 791 &context->uar, 792 context->db_tab, 793 to_mcq(cq)->set_ci_db_index); 794 } 795 mthca_free_cq(to_mdev(cq->device), to_mcq(cq)); 796 return 0; 797 } 798 799 static inline u32 convert_access(int acc) 800 { 801 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) | 802 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) | 803 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) | 804 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) | 805 MTHCA_MPT_FLAG_LOCAL_READ; 806 } 807 808 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc) 809 { 810 struct mthca_mr *mr; 811 int err; 812 813 mr = kmalloc_obj(*mr); 814 if (!mr) 815 return ERR_PTR(-ENOMEM); 816 817 err = mthca_mr_alloc_notrans(to_mdev(pd->device), 818 to_mpd(pd)->pd_num, 819 convert_access(acc), mr); 820 821 if (err) { 822 kfree(mr); 823 return ERR_PTR(err); 824 } 825 826 mr->umem = NULL; 827 828 return &mr->ibmr; 829 } 830 831 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 832 u64 virt, int acc, struct ib_dmah *dmah, 833 struct ib_udata *udata) 834 { 835 struct mthca_dev *dev = to_mdev(pd->device); 836 struct ib_block_iter biter; 837 struct mthca_ucontext *context = rdma_udata_to_drv_context( 838 udata, struct mthca_ucontext, ibucontext); 839 struct mthca_mr *mr; 840 struct mthca_reg_mr ucmd; 841 u64 *pages; 842 int n, i; 843 int err = 0; 844 int write_mtt_size; 845 846 if (dmah) 847 return ERR_PTR(-EOPNOTSUPP); 848 849 if (udata->inlen < sizeof ucmd) { 850 if (!context->reg_mr_warned) { 851 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n", 852 current->comm); 853 mthca_warn(dev, " Update libmthca to fix this.\n"); 854 } 855 ++context->reg_mr_warned; 856 ucmd.mr_attrs = 0; 857 } else { 858 err = ib_copy_validate_udata_in(udata, ucmd, reserved); 859 if (err) 860 return ERR_PTR(err); 861 } 862 863 mr = kmalloc_obj(*mr); 864 if (!mr) 865 return ERR_PTR(-ENOMEM); 866 867 mr->umem = ib_umem_get(pd->device, start, length, acc); 868 if (IS_ERR(mr->umem)) { 869 err = PTR_ERR(mr->umem); 870 goto err; 871 } 872 873 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE); 874 875 mr->mtt = mthca_alloc_mtt(dev, n); 876 if (IS_ERR(mr->mtt)) { 877 err = PTR_ERR(mr->mtt); 878 goto err_umem; 879 } 880 881 pages = (u64 *) __get_free_page(GFP_KERNEL); 882 if (!pages) { 883 err = -ENOMEM; 884 goto err_mtt; 885 } 886 887 i = n = 0; 888 889 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages)); 890 891 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) { 892 pages[i++] = rdma_block_iter_dma_address(&biter); 893 894 /* 895 * Be friendly to write_mtt and pass it chunks 896 * of appropriate size. 897 */ 898 if (i == write_mtt_size) { 899 err = mthca_write_mtt(dev, mr->mtt, n, pages, i); 900 if (err) 901 goto mtt_done; 902 n += i; 903 i = 0; 904 } 905 } 906 907 if (i) 908 err = mthca_write_mtt(dev, mr->mtt, n, pages, i); 909 mtt_done: 910 free_page((unsigned long) pages); 911 if (err) 912 goto err_mtt; 913 914 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length, 915 convert_access(acc), mr); 916 917 if (err) 918 goto err_mtt; 919 920 return &mr->ibmr; 921 922 err_mtt: 923 mthca_free_mtt(dev, mr->mtt); 924 925 err_umem: 926 ib_umem_release(mr->umem); 927 928 err: 929 kfree(mr); 930 return ERR_PTR(err); 931 } 932 933 static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata) 934 { 935 struct mthca_mr *mmr = to_mmr(mr); 936 937 mthca_free_mr(to_mdev(mr->device), mmr); 938 ib_umem_release(mmr->umem); 939 kfree(mmr); 940 941 return 0; 942 } 943 944 static ssize_t hw_rev_show(struct device *device, 945 struct device_attribute *attr, char *buf) 946 { 947 struct mthca_dev *dev = 948 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 949 950 return sysfs_emit(buf, "%x\n", dev->rev_id); 951 } 952 static DEVICE_ATTR_RO(hw_rev); 953 954 static const char *hca_type_string(int hca_type) 955 { 956 switch (hca_type) { 957 case PCI_DEVICE_ID_MELLANOX_TAVOR: 958 return "MT23108"; 959 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT: 960 return "MT25208 (MT23108 compat mode)"; 961 case PCI_DEVICE_ID_MELLANOX_ARBEL: 962 return "MT25208"; 963 case PCI_DEVICE_ID_MELLANOX_SINAI: 964 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD: 965 return "MT25204"; 966 } 967 968 return "unknown"; 969 } 970 971 static ssize_t hca_type_show(struct device *device, 972 struct device_attribute *attr, char *buf) 973 { 974 struct mthca_dev *dev = 975 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 976 977 return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device)); 978 } 979 static DEVICE_ATTR_RO(hca_type); 980 981 static ssize_t board_id_show(struct device *device, 982 struct device_attribute *attr, char *buf) 983 { 984 struct mthca_dev *dev = 985 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 986 987 return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id); 988 } 989 static DEVICE_ATTR_RO(board_id); 990 991 static struct attribute *mthca_dev_attributes[] = { 992 &dev_attr_hw_rev.attr, 993 &dev_attr_hca_type.attr, 994 &dev_attr_board_id.attr, 995 NULL 996 }; 997 998 static const struct attribute_group mthca_attr_group = { 999 .attrs = mthca_dev_attributes, 1000 }; 1001 1002 static int mthca_init_node_data(struct mthca_dev *dev) 1003 { 1004 struct ib_smp *in_mad; 1005 struct ib_smp *out_mad; 1006 int err = -ENOMEM; 1007 1008 in_mad = kzalloc_obj(*in_mad); 1009 out_mad = kmalloc_obj(*out_mad); 1010 if (!in_mad || !out_mad) 1011 goto out; 1012 1013 ib_init_query_mad(in_mad); 1014 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC; 1015 1016 err = mthca_MAD_IFC(dev, 1, 1, 1017 1, NULL, NULL, in_mad, out_mad); 1018 if (err) 1019 goto out; 1020 1021 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX); 1022 1023 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; 1024 1025 err = mthca_MAD_IFC(dev, 1, 1, 1026 1, NULL, NULL, in_mad, out_mad); 1027 if (err) 1028 goto out; 1029 1030 if (mthca_is_memfree(dev)) 1031 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32)); 1032 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8); 1033 1034 out: 1035 kfree(in_mad); 1036 kfree(out_mad); 1037 return err; 1038 } 1039 1040 static int mthca_port_immutable(struct ib_device *ibdev, u32 port_num, 1041 struct ib_port_immutable *immutable) 1042 { 1043 struct ib_port_attr attr; 1044 int err; 1045 1046 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB; 1047 1048 err = ib_query_port(ibdev, port_num, &attr); 1049 if (err) 1050 return err; 1051 1052 immutable->pkey_tbl_len = attr.pkey_tbl_len; 1053 immutable->gid_tbl_len = attr.gid_tbl_len; 1054 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 1055 1056 return 0; 1057 } 1058 1059 static void get_dev_fw_str(struct ib_device *device, char *str) 1060 { 1061 struct mthca_dev *dev = 1062 container_of(device, struct mthca_dev, ib_dev); 1063 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d", 1064 (int) (dev->fw_ver >> 32), 1065 (int) (dev->fw_ver >> 16) & 0xffff, 1066 (int) dev->fw_ver & 0xffff); 1067 } 1068 1069 static const struct ib_device_ops mthca_dev_ops = { 1070 .owner = THIS_MODULE, 1071 .driver_id = RDMA_DRIVER_MTHCA, 1072 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION, 1073 .uverbs_no_driver_id_binding = 1, 1074 1075 .alloc_pd = mthca_alloc_pd, 1076 .alloc_ucontext = mthca_alloc_ucontext, 1077 .attach_mcast = mthca_multicast_attach, 1078 .create_ah = mthca_ah_create, 1079 .create_cq = mthca_create_cq, 1080 .create_qp = mthca_create_qp, 1081 .dealloc_pd = mthca_dealloc_pd, 1082 .dealloc_ucontext = mthca_dealloc_ucontext, 1083 .dereg_mr = mthca_dereg_mr, 1084 .destroy_ah = mthca_ah_destroy, 1085 .destroy_cq = mthca_destroy_cq, 1086 .destroy_qp = mthca_destroy_qp, 1087 .detach_mcast = mthca_multicast_detach, 1088 .device_group = &mthca_attr_group, 1089 .get_dev_fw_str = get_dev_fw_str, 1090 .get_dma_mr = mthca_get_dma_mr, 1091 .get_port_immutable = mthca_port_immutable, 1092 .mmap = mthca_mmap_uar, 1093 .modify_device = mthca_modify_device, 1094 .modify_port = mthca_modify_port, 1095 .modify_qp = mthca_modify_qp, 1096 .poll_cq = mthca_poll_cq, 1097 .process_mad = mthca_process_mad, 1098 .query_ah = mthca_ah_query, 1099 .query_device = mthca_query_device, 1100 .query_gid = mthca_query_gid, 1101 .query_pkey = mthca_query_pkey, 1102 .query_port = mthca_query_port, 1103 .query_qp = mthca_query_qp, 1104 .reg_user_mr = mthca_reg_user_mr, 1105 .resize_user_cq = mthca_resize_cq, 1106 1107 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah), 1108 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq), 1109 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd), 1110 INIT_RDMA_OBJ_SIZE(ib_qp, mthca_qp, ibqp), 1111 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext), 1112 }; 1113 1114 static const struct ib_device_ops mthca_dev_arbel_srq_ops = { 1115 .create_srq = mthca_create_srq, 1116 .destroy_srq = mthca_destroy_srq, 1117 .modify_srq = mthca_modify_srq, 1118 .post_srq_recv = mthca_arbel_post_srq_recv, 1119 .query_srq = mthca_query_srq, 1120 1121 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), 1122 }; 1123 1124 static const struct ib_device_ops mthca_dev_tavor_srq_ops = { 1125 .create_srq = mthca_create_srq, 1126 .destroy_srq = mthca_destroy_srq, 1127 .modify_srq = mthca_modify_srq, 1128 .post_srq_recv = mthca_tavor_post_srq_recv, 1129 .query_srq = mthca_query_srq, 1130 1131 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), 1132 }; 1133 1134 static const struct ib_device_ops mthca_dev_arbel_ops = { 1135 .post_recv = mthca_arbel_post_receive, 1136 .post_send = mthca_arbel_post_send, 1137 .req_notify_cq = mthca_arbel_arm_cq, 1138 }; 1139 1140 static const struct ib_device_ops mthca_dev_tavor_ops = { 1141 .post_recv = mthca_tavor_post_receive, 1142 .post_send = mthca_tavor_post_send, 1143 .req_notify_cq = mthca_tavor_arm_cq, 1144 }; 1145 1146 int mthca_register_device(struct mthca_dev *dev) 1147 { 1148 int ret; 1149 1150 ret = mthca_init_node_data(dev); 1151 if (ret) 1152 return ret; 1153 1154 dev->ib_dev.node_type = RDMA_NODE_IB_CA; 1155 dev->ib_dev.phys_port_cnt = dev->limits.num_ports; 1156 dev->ib_dev.num_comp_vectors = 1; 1157 dev->ib_dev.dev.parent = &dev->pdev->dev; 1158 1159 if (dev->mthca_flags & MTHCA_FLAG_SRQ) { 1160 if (mthca_is_memfree(dev)) 1161 ib_set_device_ops(&dev->ib_dev, 1162 &mthca_dev_arbel_srq_ops); 1163 else 1164 ib_set_device_ops(&dev->ib_dev, 1165 &mthca_dev_tavor_srq_ops); 1166 } 1167 1168 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops); 1169 1170 if (mthca_is_memfree(dev)) 1171 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops); 1172 else 1173 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops); 1174 1175 mutex_init(&dev->cap_mask_mutex); 1176 1177 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev); 1178 if (ret) 1179 return ret; 1180 1181 mthca_start_catas_poll(dev); 1182 1183 return 0; 1184 } 1185 1186 void mthca_unregister_device(struct mthca_dev *dev) 1187 { 1188 mthca_stop_catas_poll(dev); 1189 ib_unregister_device(&dev->ib_dev); 1190 } 1191