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_umem.h> 39 #include <rdma/ib_user_verbs.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(sizeof *in_mad, GFP_KERNEL); 65 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 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(sizeof *in_mad, GFP_KERNEL); 129 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 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(sizeof *in_mad, GFP_KERNEL); 225 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 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(sizeof *in_mad, GFP_KERNEL); 254 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 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 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) 406 return -EFAULT; 407 408 err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar, 409 context->db_tab, ucmd.db_index, 410 ucmd.db_page); 411 412 if (err) 413 return err; 414 415 srq->mr.ibmr.lkey = ucmd.lkey; 416 srq->db_index = ucmd.db_index; 417 } 418 419 err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd), 420 &init_attr->attr, srq, udata); 421 422 if (err && udata) 423 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar, 424 context->db_tab, ucmd.db_index); 425 426 if (err) 427 return err; 428 429 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) { 430 mthca_free_srq(to_mdev(ibsrq->device), srq); 431 return -EFAULT; 432 } 433 434 return 0; 435 } 436 437 static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata) 438 { 439 if (udata) { 440 struct mthca_ucontext *context = 441 rdma_udata_to_drv_context( 442 udata, 443 struct mthca_ucontext, 444 ibucontext); 445 446 mthca_unmap_user_db(to_mdev(srq->device), &context->uar, 447 context->db_tab, to_msrq(srq)->db_index); 448 } 449 450 mthca_free_srq(to_mdev(srq->device), to_msrq(srq)); 451 return 0; 452 } 453 454 static int mthca_create_qp(struct ib_qp *ibqp, 455 struct ib_qp_init_attr *init_attr, 456 struct ib_udata *udata) 457 { 458 struct mthca_ucontext *context = rdma_udata_to_drv_context( 459 udata, struct mthca_ucontext, ibucontext); 460 struct mthca_create_qp ucmd; 461 struct mthca_qp *qp = to_mqp(ibqp); 462 struct mthca_dev *dev = to_mdev(ibqp->device); 463 int err; 464 465 if (init_attr->create_flags) 466 return -EOPNOTSUPP; 467 468 switch (init_attr->qp_type) { 469 case IB_QPT_RC: 470 case IB_QPT_UC: 471 case IB_QPT_UD: 472 { 473 if (udata) { 474 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) 475 return -EFAULT; 476 477 err = mthca_map_user_db(dev, &context->uar, 478 context->db_tab, 479 ucmd.sq_db_index, 480 ucmd.sq_db_page); 481 if (err) 482 return err; 483 484 err = mthca_map_user_db(dev, &context->uar, 485 context->db_tab, 486 ucmd.rq_db_index, 487 ucmd.rq_db_page); 488 if (err) { 489 mthca_unmap_user_db(dev, &context->uar, 490 context->db_tab, 491 ucmd.sq_db_index); 492 return err; 493 } 494 495 qp->mr.ibmr.lkey = ucmd.lkey; 496 qp->sq.db_index = ucmd.sq_db_index; 497 qp->rq.db_index = ucmd.rq_db_index; 498 } 499 500 err = mthca_alloc_qp(dev, to_mpd(ibqp->pd), 501 to_mcq(init_attr->send_cq), 502 to_mcq(init_attr->recv_cq), 503 init_attr->qp_type, init_attr->sq_sig_type, 504 &init_attr->cap, qp, udata); 505 506 if (err && udata) { 507 mthca_unmap_user_db(dev, &context->uar, context->db_tab, 508 ucmd.sq_db_index); 509 mthca_unmap_user_db(dev, &context->uar, context->db_tab, 510 ucmd.rq_db_index); 511 } 512 513 qp->ibqp.qp_num = qp->qpn; 514 break; 515 } 516 case IB_QPT_SMI: 517 case IB_QPT_GSI: 518 { 519 qp->sqp = kzalloc(sizeof(struct mthca_sqp), GFP_KERNEL); 520 if (!qp->sqp) 521 return -ENOMEM; 522 523 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; 524 525 err = mthca_alloc_sqp(dev, to_mpd(ibqp->pd), 526 to_mcq(init_attr->send_cq), 527 to_mcq(init_attr->recv_cq), 528 init_attr->sq_sig_type, &init_attr->cap, 529 qp->ibqp.qp_num, init_attr->port_num, qp, 530 udata); 531 break; 532 } 533 default: 534 /* Don't support raw QPs */ 535 return -EOPNOTSUPP; 536 } 537 538 if (err) { 539 kfree(qp->sqp); 540 return err; 541 } 542 543 init_attr->cap.max_send_wr = qp->sq.max; 544 init_attr->cap.max_recv_wr = qp->rq.max; 545 init_attr->cap.max_send_sge = qp->sq.max_gs; 546 init_attr->cap.max_recv_sge = qp->rq.max_gs; 547 init_attr->cap.max_inline_data = qp->max_inline_data; 548 549 return 0; 550 } 551 552 static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 553 { 554 if (udata) { 555 struct mthca_ucontext *context = 556 rdma_udata_to_drv_context( 557 udata, 558 struct mthca_ucontext, 559 ibucontext); 560 561 mthca_unmap_user_db(to_mdev(qp->device), 562 &context->uar, 563 context->db_tab, 564 to_mqp(qp)->sq.db_index); 565 mthca_unmap_user_db(to_mdev(qp->device), 566 &context->uar, 567 context->db_tab, 568 to_mqp(qp)->rq.db_index); 569 } 570 mthca_free_qp(to_mdev(qp->device), to_mqp(qp)); 571 kfree(to_mqp(qp)->sqp); 572 return 0; 573 } 574 575 static int mthca_create_cq(struct ib_cq *ibcq, 576 const struct ib_cq_init_attr *attr, 577 struct ib_udata *udata) 578 { 579 struct ib_device *ibdev = ibcq->device; 580 int entries = attr->cqe; 581 struct mthca_create_cq ucmd; 582 struct mthca_cq *cq; 583 int nent; 584 int err; 585 struct mthca_ucontext *context = rdma_udata_to_drv_context( 586 udata, struct mthca_ucontext, ibucontext); 587 588 if (attr->flags) 589 return -EOPNOTSUPP; 590 591 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes) 592 return -EINVAL; 593 594 if (udata) { 595 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) 596 return -EFAULT; 597 598 err = mthca_map_user_db(to_mdev(ibdev), &context->uar, 599 context->db_tab, ucmd.set_db_index, 600 ucmd.set_db_page); 601 if (err) 602 return err; 603 604 err = mthca_map_user_db(to_mdev(ibdev), &context->uar, 605 context->db_tab, ucmd.arm_db_index, 606 ucmd.arm_db_page); 607 if (err) 608 goto err_unmap_set; 609 } 610 611 cq = to_mcq(ibcq); 612 613 if (udata) { 614 cq->buf.mr.ibmr.lkey = ucmd.lkey; 615 cq->set_ci_db_index = ucmd.set_db_index; 616 cq->arm_db_index = ucmd.arm_db_index; 617 } 618 619 for (nent = 1; nent <= entries; nent <<= 1) 620 ; /* nothing */ 621 622 err = mthca_init_cq(to_mdev(ibdev), nent, context, 623 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num, 624 cq); 625 if (err) 626 goto err_unmap_arm; 627 628 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) { 629 mthca_free_cq(to_mdev(ibdev), cq); 630 err = -EFAULT; 631 goto err_unmap_arm; 632 } 633 634 cq->resize_buf = NULL; 635 636 return 0; 637 638 err_unmap_arm: 639 if (udata) 640 mthca_unmap_user_db(to_mdev(ibdev), &context->uar, 641 context->db_tab, ucmd.arm_db_index); 642 643 err_unmap_set: 644 if (udata) 645 mthca_unmap_user_db(to_mdev(ibdev), &context->uar, 646 context->db_tab, ucmd.set_db_index); 647 648 return err; 649 } 650 651 static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq, 652 int entries) 653 { 654 int ret; 655 656 spin_lock_irq(&cq->lock); 657 if (cq->resize_buf) { 658 ret = -EBUSY; 659 goto unlock; 660 } 661 662 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC); 663 if (!cq->resize_buf) { 664 ret = -ENOMEM; 665 goto unlock; 666 } 667 668 cq->resize_buf->state = CQ_RESIZE_ALLOC; 669 670 ret = 0; 671 672 unlock: 673 spin_unlock_irq(&cq->lock); 674 675 if (ret) 676 return ret; 677 678 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries); 679 if (ret) { 680 spin_lock_irq(&cq->lock); 681 kfree(cq->resize_buf); 682 cq->resize_buf = NULL; 683 spin_unlock_irq(&cq->lock); 684 return ret; 685 } 686 687 cq->resize_buf->cqe = entries - 1; 688 689 spin_lock_irq(&cq->lock); 690 cq->resize_buf->state = CQ_RESIZE_READY; 691 spin_unlock_irq(&cq->lock); 692 693 return 0; 694 } 695 696 static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) 697 { 698 struct mthca_dev *dev = to_mdev(ibcq->device); 699 struct mthca_cq *cq = to_mcq(ibcq); 700 struct mthca_resize_cq ucmd; 701 u32 lkey; 702 int ret; 703 704 if (entries < 1 || entries > dev->limits.max_cqes) 705 return -EINVAL; 706 707 mutex_lock(&cq->mutex); 708 709 entries = roundup_pow_of_two(entries + 1); 710 if (entries == ibcq->cqe + 1) { 711 ret = 0; 712 goto out; 713 } 714 715 if (cq->is_kernel) { 716 ret = mthca_alloc_resize_buf(dev, cq, entries); 717 if (ret) 718 goto out; 719 lkey = cq->resize_buf->buf.mr.ibmr.lkey; 720 } else { 721 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 722 ret = -EFAULT; 723 goto out; 724 } 725 lkey = ucmd.lkey; 726 } 727 728 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries)); 729 730 if (ret) { 731 if (cq->resize_buf) { 732 mthca_free_cq_buf(dev, &cq->resize_buf->buf, 733 cq->resize_buf->cqe); 734 kfree(cq->resize_buf); 735 spin_lock_irq(&cq->lock); 736 cq->resize_buf = NULL; 737 spin_unlock_irq(&cq->lock); 738 } 739 goto out; 740 } 741 742 if (cq->is_kernel) { 743 struct mthca_cq_buf tbuf; 744 int tcqe; 745 746 spin_lock_irq(&cq->lock); 747 if (cq->resize_buf->state == CQ_RESIZE_READY) { 748 mthca_cq_resize_copy_cqes(cq); 749 tbuf = cq->buf; 750 tcqe = cq->ibcq.cqe; 751 cq->buf = cq->resize_buf->buf; 752 cq->ibcq.cqe = cq->resize_buf->cqe; 753 } else { 754 tbuf = cq->resize_buf->buf; 755 tcqe = cq->resize_buf->cqe; 756 } 757 758 kfree(cq->resize_buf); 759 cq->resize_buf = NULL; 760 spin_unlock_irq(&cq->lock); 761 762 mthca_free_cq_buf(dev, &tbuf, tcqe); 763 } else 764 ibcq->cqe = entries - 1; 765 766 out: 767 mutex_unlock(&cq->mutex); 768 769 return ret; 770 } 771 772 static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) 773 { 774 if (udata) { 775 struct mthca_ucontext *context = 776 rdma_udata_to_drv_context( 777 udata, 778 struct mthca_ucontext, 779 ibucontext); 780 781 mthca_unmap_user_db(to_mdev(cq->device), 782 &context->uar, 783 context->db_tab, 784 to_mcq(cq)->arm_db_index); 785 mthca_unmap_user_db(to_mdev(cq->device), 786 &context->uar, 787 context->db_tab, 788 to_mcq(cq)->set_ci_db_index); 789 } 790 mthca_free_cq(to_mdev(cq->device), to_mcq(cq)); 791 return 0; 792 } 793 794 static inline u32 convert_access(int acc) 795 { 796 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) | 797 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) | 798 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) | 799 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) | 800 MTHCA_MPT_FLAG_LOCAL_READ; 801 } 802 803 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc) 804 { 805 struct mthca_mr *mr; 806 int err; 807 808 mr = kmalloc(sizeof *mr, GFP_KERNEL); 809 if (!mr) 810 return ERR_PTR(-ENOMEM); 811 812 err = mthca_mr_alloc_notrans(to_mdev(pd->device), 813 to_mpd(pd)->pd_num, 814 convert_access(acc), mr); 815 816 if (err) { 817 kfree(mr); 818 return ERR_PTR(err); 819 } 820 821 mr->umem = NULL; 822 823 return &mr->ibmr; 824 } 825 826 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 827 u64 virt, int acc, struct ib_udata *udata) 828 { 829 struct mthca_dev *dev = to_mdev(pd->device); 830 struct ib_block_iter biter; 831 struct mthca_ucontext *context = rdma_udata_to_drv_context( 832 udata, struct mthca_ucontext, ibucontext); 833 struct mthca_mr *mr; 834 struct mthca_reg_mr ucmd; 835 u64 *pages; 836 int n, i; 837 int err = 0; 838 int write_mtt_size; 839 840 if (udata->inlen < sizeof ucmd) { 841 if (!context->reg_mr_warned) { 842 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n", 843 current->comm); 844 mthca_warn(dev, " Update libmthca to fix this.\n"); 845 } 846 ++context->reg_mr_warned; 847 ucmd.mr_attrs = 0; 848 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) 849 return ERR_PTR(-EFAULT); 850 851 mr = kmalloc(sizeof *mr, GFP_KERNEL); 852 if (!mr) 853 return ERR_PTR(-ENOMEM); 854 855 mr->umem = ib_umem_get(pd->device, start, length, acc); 856 if (IS_ERR(mr->umem)) { 857 err = PTR_ERR(mr->umem); 858 goto err; 859 } 860 861 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE); 862 863 mr->mtt = mthca_alloc_mtt(dev, n); 864 if (IS_ERR(mr->mtt)) { 865 err = PTR_ERR(mr->mtt); 866 goto err_umem; 867 } 868 869 pages = (u64 *) __get_free_page(GFP_KERNEL); 870 if (!pages) { 871 err = -ENOMEM; 872 goto err_mtt; 873 } 874 875 i = n = 0; 876 877 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages)); 878 879 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) { 880 pages[i++] = rdma_block_iter_dma_address(&biter); 881 882 /* 883 * Be friendly to write_mtt and pass it chunks 884 * of appropriate size. 885 */ 886 if (i == write_mtt_size) { 887 err = mthca_write_mtt(dev, mr->mtt, n, pages, i); 888 if (err) 889 goto mtt_done; 890 n += i; 891 i = 0; 892 } 893 } 894 895 if (i) 896 err = mthca_write_mtt(dev, mr->mtt, n, pages, i); 897 mtt_done: 898 free_page((unsigned long) pages); 899 if (err) 900 goto err_mtt; 901 902 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length, 903 convert_access(acc), mr); 904 905 if (err) 906 goto err_mtt; 907 908 return &mr->ibmr; 909 910 err_mtt: 911 mthca_free_mtt(dev, mr->mtt); 912 913 err_umem: 914 ib_umem_release(mr->umem); 915 916 err: 917 kfree(mr); 918 return ERR_PTR(err); 919 } 920 921 static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata) 922 { 923 struct mthca_mr *mmr = to_mmr(mr); 924 925 mthca_free_mr(to_mdev(mr->device), mmr); 926 ib_umem_release(mmr->umem); 927 kfree(mmr); 928 929 return 0; 930 } 931 932 static ssize_t hw_rev_show(struct device *device, 933 struct device_attribute *attr, char *buf) 934 { 935 struct mthca_dev *dev = 936 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 937 938 return sysfs_emit(buf, "%x\n", dev->rev_id); 939 } 940 static DEVICE_ATTR_RO(hw_rev); 941 942 static const char *hca_type_string(int hca_type) 943 { 944 switch (hca_type) { 945 case PCI_DEVICE_ID_MELLANOX_TAVOR: 946 return "MT23108"; 947 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT: 948 return "MT25208 (MT23108 compat mode)"; 949 case PCI_DEVICE_ID_MELLANOX_ARBEL: 950 return "MT25208"; 951 case PCI_DEVICE_ID_MELLANOX_SINAI: 952 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD: 953 return "MT25204"; 954 } 955 956 return "unknown"; 957 } 958 959 static ssize_t hca_type_show(struct device *device, 960 struct device_attribute *attr, char *buf) 961 { 962 struct mthca_dev *dev = 963 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 964 965 return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device)); 966 } 967 static DEVICE_ATTR_RO(hca_type); 968 969 static ssize_t board_id_show(struct device *device, 970 struct device_attribute *attr, char *buf) 971 { 972 struct mthca_dev *dev = 973 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 974 975 return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id); 976 } 977 static DEVICE_ATTR_RO(board_id); 978 979 static struct attribute *mthca_dev_attributes[] = { 980 &dev_attr_hw_rev.attr, 981 &dev_attr_hca_type.attr, 982 &dev_attr_board_id.attr, 983 NULL 984 }; 985 986 static const struct attribute_group mthca_attr_group = { 987 .attrs = mthca_dev_attributes, 988 }; 989 990 static int mthca_init_node_data(struct mthca_dev *dev) 991 { 992 struct ib_smp *in_mad; 993 struct ib_smp *out_mad; 994 int err = -ENOMEM; 995 996 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); 997 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 998 if (!in_mad || !out_mad) 999 goto out; 1000 1001 ib_init_query_mad(in_mad); 1002 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC; 1003 1004 err = mthca_MAD_IFC(dev, 1, 1, 1005 1, NULL, NULL, in_mad, out_mad); 1006 if (err) 1007 goto out; 1008 1009 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX); 1010 1011 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; 1012 1013 err = mthca_MAD_IFC(dev, 1, 1, 1014 1, NULL, NULL, in_mad, out_mad); 1015 if (err) 1016 goto out; 1017 1018 if (mthca_is_memfree(dev)) 1019 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32)); 1020 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8); 1021 1022 out: 1023 kfree(in_mad); 1024 kfree(out_mad); 1025 return err; 1026 } 1027 1028 static int mthca_port_immutable(struct ib_device *ibdev, u32 port_num, 1029 struct ib_port_immutable *immutable) 1030 { 1031 struct ib_port_attr attr; 1032 int err; 1033 1034 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB; 1035 1036 err = ib_query_port(ibdev, port_num, &attr); 1037 if (err) 1038 return err; 1039 1040 immutable->pkey_tbl_len = attr.pkey_tbl_len; 1041 immutable->gid_tbl_len = attr.gid_tbl_len; 1042 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 1043 1044 return 0; 1045 } 1046 1047 static void get_dev_fw_str(struct ib_device *device, char *str) 1048 { 1049 struct mthca_dev *dev = 1050 container_of(device, struct mthca_dev, ib_dev); 1051 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d", 1052 (int) (dev->fw_ver >> 32), 1053 (int) (dev->fw_ver >> 16) & 0xffff, 1054 (int) dev->fw_ver & 0xffff); 1055 } 1056 1057 static const struct ib_device_ops mthca_dev_ops = { 1058 .owner = THIS_MODULE, 1059 .driver_id = RDMA_DRIVER_MTHCA, 1060 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION, 1061 .uverbs_no_driver_id_binding = 1, 1062 1063 .alloc_pd = mthca_alloc_pd, 1064 .alloc_ucontext = mthca_alloc_ucontext, 1065 .attach_mcast = mthca_multicast_attach, 1066 .create_ah = mthca_ah_create, 1067 .create_cq = mthca_create_cq, 1068 .create_qp = mthca_create_qp, 1069 .dealloc_pd = mthca_dealloc_pd, 1070 .dealloc_ucontext = mthca_dealloc_ucontext, 1071 .dereg_mr = mthca_dereg_mr, 1072 .destroy_ah = mthca_ah_destroy, 1073 .destroy_cq = mthca_destroy_cq, 1074 .destroy_qp = mthca_destroy_qp, 1075 .detach_mcast = mthca_multicast_detach, 1076 .device_group = &mthca_attr_group, 1077 .get_dev_fw_str = get_dev_fw_str, 1078 .get_dma_mr = mthca_get_dma_mr, 1079 .get_port_immutable = mthca_port_immutable, 1080 .mmap = mthca_mmap_uar, 1081 .modify_device = mthca_modify_device, 1082 .modify_port = mthca_modify_port, 1083 .modify_qp = mthca_modify_qp, 1084 .poll_cq = mthca_poll_cq, 1085 .process_mad = mthca_process_mad, 1086 .query_ah = mthca_ah_query, 1087 .query_device = mthca_query_device, 1088 .query_gid = mthca_query_gid, 1089 .query_pkey = mthca_query_pkey, 1090 .query_port = mthca_query_port, 1091 .query_qp = mthca_query_qp, 1092 .reg_user_mr = mthca_reg_user_mr, 1093 .resize_cq = mthca_resize_cq, 1094 1095 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah), 1096 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq), 1097 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd), 1098 INIT_RDMA_OBJ_SIZE(ib_qp, mthca_qp, ibqp), 1099 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext), 1100 }; 1101 1102 static const struct ib_device_ops mthca_dev_arbel_srq_ops = { 1103 .create_srq = mthca_create_srq, 1104 .destroy_srq = mthca_destroy_srq, 1105 .modify_srq = mthca_modify_srq, 1106 .post_srq_recv = mthca_arbel_post_srq_recv, 1107 .query_srq = mthca_query_srq, 1108 1109 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), 1110 }; 1111 1112 static const struct ib_device_ops mthca_dev_tavor_srq_ops = { 1113 .create_srq = mthca_create_srq, 1114 .destroy_srq = mthca_destroy_srq, 1115 .modify_srq = mthca_modify_srq, 1116 .post_srq_recv = mthca_tavor_post_srq_recv, 1117 .query_srq = mthca_query_srq, 1118 1119 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), 1120 }; 1121 1122 static const struct ib_device_ops mthca_dev_arbel_ops = { 1123 .post_recv = mthca_arbel_post_receive, 1124 .post_send = mthca_arbel_post_send, 1125 .req_notify_cq = mthca_arbel_arm_cq, 1126 }; 1127 1128 static const struct ib_device_ops mthca_dev_tavor_ops = { 1129 .post_recv = mthca_tavor_post_receive, 1130 .post_send = mthca_tavor_post_send, 1131 .req_notify_cq = mthca_tavor_arm_cq, 1132 }; 1133 1134 int mthca_register_device(struct mthca_dev *dev) 1135 { 1136 int ret; 1137 1138 ret = mthca_init_node_data(dev); 1139 if (ret) 1140 return ret; 1141 1142 dev->ib_dev.node_type = RDMA_NODE_IB_CA; 1143 dev->ib_dev.phys_port_cnt = dev->limits.num_ports; 1144 dev->ib_dev.num_comp_vectors = 1; 1145 dev->ib_dev.dev.parent = &dev->pdev->dev; 1146 1147 if (dev->mthca_flags & MTHCA_FLAG_SRQ) { 1148 if (mthca_is_memfree(dev)) 1149 ib_set_device_ops(&dev->ib_dev, 1150 &mthca_dev_arbel_srq_ops); 1151 else 1152 ib_set_device_ops(&dev->ib_dev, 1153 &mthca_dev_tavor_srq_ops); 1154 } 1155 1156 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops); 1157 1158 if (mthca_is_memfree(dev)) 1159 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops); 1160 else 1161 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops); 1162 1163 mutex_init(&dev->cap_mask_mutex); 1164 1165 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev); 1166 if (ret) 1167 return ret; 1168 1169 mthca_start_catas_poll(dev); 1170 1171 return 0; 1172 } 1173 1174 void mthca_unregister_device(struct mthca_dev *dev) 1175 { 1176 mthca_stop_catas_poll(dev); 1177 ib_unregister_device(&dev->ib_dev); 1178 } 1179