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 53static void init_query_mad(struct ib_smp *mad) 54{ 55 mad->base_version = 1; 56 mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; 57 mad->class_version = 1; 58 mad->method = IB_MGMT_METHOD_GET; 59} 60 61static int mthca_query_device(struct ib_device *ibdev, struct ib_device_attr *props, 62 struct ib_udata *uhw) 63{ 64 struct ib_smp *in_mad = NULL; 65 struct ib_smp *out_mad = NULL; 66 int err = -ENOMEM; 67 struct mthca_dev *mdev = to_mdev(ibdev); 68 69 if (uhw->inlen || uhw->outlen) 70 return -EINVAL; 71 72 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); 73 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 74 if (!in_mad || !out_mad) 75 goto out; 76 77 memset(props, 0, sizeof *props); 78 79 props->fw_ver = mdev->fw_ver; 80 81 init_query_mad(in_mad); 82 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; 83 84 err = mthca_MAD_IFC(mdev, 1, 1, 85 1, NULL, NULL, in_mad, out_mad); 86 if (err) 87 goto out; 88 89 props->device_cap_flags = mdev->device_cap_flags; 90 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) & 91 0xffffff; 92 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30)); 93 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32)); 94 memcpy(&props->sys_image_guid, out_mad->data + 4, 8); 95 96 props->max_mr_size = ~0ull; 97 props->page_size_cap = mdev->limits.page_size_cap; 98 props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps; 99 props->max_qp_wr = mdev->limits.max_wqes; 100 props->max_send_sge = mdev->limits.max_sg; 101 props->max_recv_sge = mdev->limits.max_sg; 102 props->max_sge_rd = mdev->limits.max_sg; 103 props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs; 104 props->max_cqe = mdev->limits.max_cqes; 105 props->max_mr = mdev->limits.num_mpts - mdev->limits.reserved_mrws; 106 props->max_pd = mdev->limits.num_pds - mdev->limits.reserved_pds; 107 props->max_qp_rd_atom = 1 << mdev->qp_table.rdb_shift; 108 props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma; 109 props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp; 110 props->max_srq = mdev->limits.num_srqs - mdev->limits.reserved_srqs; 111 props->max_srq_wr = mdev->limits.max_srq_wqes; 112 props->max_srq_sge = mdev->limits.max_srq_sge; 113 props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay; 114 props->atomic_cap = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ? 115 IB_ATOMIC_HCA : IB_ATOMIC_NONE; 116 props->max_pkeys = mdev->limits.pkey_table_len; 117 props->max_mcast_grp = mdev->limits.num_mgms + mdev->limits.num_amgms; 118 props->max_mcast_qp_attach = MTHCA_QP_PER_MGM; 119 props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * 120 props->max_mcast_grp; 121 122 err = 0; 123 out: 124 kfree(in_mad); 125 kfree(out_mad); 126 return err; 127} 128 129static int mthca_query_port(struct ib_device *ibdev, 130 u8 port, struct ib_port_attr *props) 131{ 132 struct ib_smp *in_mad = NULL; 133 struct ib_smp *out_mad = NULL; 134 int err = -ENOMEM; 135 136 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); 137 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 138 if (!in_mad || !out_mad) 139 goto out; 140 141 /* props being zeroed by the caller, avoid zeroing it here */ 142 143 init_query_mad(in_mad); 144 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; 145 in_mad->attr_mod = cpu_to_be32(port); 146 147 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 148 port, NULL, NULL, in_mad, out_mad); 149 if (err) 150 goto out; 151 152 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16)); 153 props->lmc = out_mad->data[34] & 0x7; 154 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18)); 155 props->sm_sl = out_mad->data[36] & 0xf; 156 props->state = out_mad->data[32] & 0xf; 157 props->phys_state = out_mad->data[33] >> 4; 158 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20)); 159 props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len; 160 props->max_msg_sz = 0x80000000; 161 props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len; 162 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46)); 163 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48)); 164 props->active_width = out_mad->data[31] & 0xf; 165 props->active_speed = out_mad->data[35] >> 4; 166 props->max_mtu = out_mad->data[41] & 0xf; 167 props->active_mtu = out_mad->data[36] >> 4; 168 props->subnet_timeout = out_mad->data[51] & 0x1f; 169 props->max_vl_num = out_mad->data[37] >> 4; 170 props->init_type_reply = out_mad->data[41] >> 4; 171 172 out: 173 kfree(in_mad); 174 kfree(out_mad); 175 return err; 176} 177 178static int mthca_modify_device(struct ib_device *ibdev, 179 int mask, 180 struct ib_device_modify *props) 181{ 182 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC) 183 return -EOPNOTSUPP; 184 185 if (mask & IB_DEVICE_MODIFY_NODE_DESC) { 186 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex)) 187 return -ERESTARTSYS; 188 memcpy(ibdev->node_desc, props->node_desc, 189 IB_DEVICE_NODE_DESC_MAX); 190 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex); 191 } 192 193 return 0; 194} 195 196static int mthca_modify_port(struct ib_device *ibdev, 197 u8 port, int port_modify_mask, 198 struct ib_port_modify *props) 199{ 200 struct mthca_set_ib_param set_ib; 201 struct ib_port_attr attr; 202 int err; 203 204 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex)) 205 return -ERESTARTSYS; 206 207 err = ib_query_port(ibdev, port, &attr); 208 if (err) 209 goto out; 210 211 set_ib.set_si_guid = 0; 212 set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR); 213 214 set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) & 215 ~props->clr_port_cap_mask; 216 217 err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port); 218 if (err) 219 goto out; 220out: 221 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex); 222 return err; 223} 224 225static int mthca_query_pkey(struct ib_device *ibdev, 226 u8 port, u16 index, u16 *pkey) 227{ 228 struct ib_smp *in_mad = NULL; 229 struct ib_smp *out_mad = NULL; 230 int err = -ENOMEM; 231 232 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); 233 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 234 if (!in_mad || !out_mad) 235 goto out; 236 237 init_query_mad(in_mad); 238 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE; 239 in_mad->attr_mod = cpu_to_be32(index / 32); 240 241 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 242 port, NULL, NULL, in_mad, out_mad); 243 if (err) 244 goto out; 245 246 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]); 247 248 out: 249 kfree(in_mad); 250 kfree(out_mad); 251 return err; 252} 253 254static int mthca_query_gid(struct ib_device *ibdev, u8 port, 255 int index, union ib_gid *gid) 256{ 257 struct ib_smp *in_mad = NULL; 258 struct ib_smp *out_mad = NULL; 259 int err = -ENOMEM; 260 261 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); 262 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 263 if (!in_mad || !out_mad) 264 goto out; 265 266 init_query_mad(in_mad); 267 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO; 268 in_mad->attr_mod = cpu_to_be32(port); 269 270 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 271 port, NULL, NULL, in_mad, out_mad); 272 if (err) 273 goto out; 274 275 memcpy(gid->raw, out_mad->data + 8, 8); 276 277 init_query_mad(in_mad); 278 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; 279 in_mad->attr_mod = cpu_to_be32(index / 8); 280 281 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1, 282 port, NULL, NULL, in_mad, out_mad); 283 if (err) 284 goto out; 285 286 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8); 287 288 out: 289 kfree(in_mad); 290 kfree(out_mad); 291 return err; 292} 293 294static int mthca_alloc_ucontext(struct ib_ucontext *uctx, 295 struct ib_udata *udata) 296{ 297 struct ib_device *ibdev = uctx->device; 298 struct mthca_alloc_ucontext_resp uresp = {}; 299 struct mthca_ucontext *context = to_mucontext(uctx); 300 int err; 301 302 if (!(to_mdev(ibdev)->active)) 303 return -EAGAIN; 304 305 uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps; 306 if (mthca_is_memfree(to_mdev(ibdev))) 307 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size; 308 else 309 uresp.uarc_size = 0; 310 311 err = mthca_uar_alloc(to_mdev(ibdev), &context->uar); 312 if (err) 313 return err; 314 315 context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev)); 316 if (IS_ERR(context->db_tab)) { 317 err = PTR_ERR(context->db_tab); 318 mthca_uar_free(to_mdev(ibdev), &context->uar); 319 return err; 320 } 321 322 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) { 323 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab); 324 mthca_uar_free(to_mdev(ibdev), &context->uar); 325 return -EFAULT; 326 } 327 328 context->reg_mr_warned = 0; 329 330 return 0; 331} 332 333static void mthca_dealloc_ucontext(struct ib_ucontext *context) 334{ 335 mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar, 336 to_mucontext(context)->db_tab); 337 mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar); 338} 339 340static int mthca_mmap_uar(struct ib_ucontext *context, 341 struct vm_area_struct *vma) 342{ 343 if (vma->vm_end - vma->vm_start != PAGE_SIZE) 344 return -EINVAL; 345 346 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 347 348 if (io_remap_pfn_range(vma, vma->vm_start, 349 to_mucontext(context)->uar.pfn, 350 PAGE_SIZE, vma->vm_page_prot)) 351 return -EAGAIN; 352 353 return 0; 354} 355 356static int mthca_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 357{ 358 struct ib_device *ibdev = ibpd->device; 359 struct mthca_pd *pd = to_mpd(ibpd); 360 int err; 361 362 err = mthca_pd_alloc(to_mdev(ibdev), !udata, pd); 363 if (err) 364 return err; 365 366 if (udata) { 367 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) { 368 mthca_pd_free(to_mdev(ibdev), pd); 369 return -EFAULT; 370 } 371 } 372 373 return 0; 374} 375 376static int mthca_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) 377{ 378 mthca_pd_free(to_mdev(pd->device), to_mpd(pd)); 379 return 0; 380} 381 382static int mthca_ah_create(struct ib_ah *ibah, 383 struct rdma_ah_init_attr *init_attr, 384 struct ib_udata *udata) 385 386{ 387 struct mthca_ah *ah = to_mah(ibah); 388 389 return mthca_create_ah(to_mdev(ibah->device), to_mpd(ibah->pd), 390 init_attr->ah_attr, ah); 391} 392 393static int mthca_ah_destroy(struct ib_ah *ah, u32 flags) 394{ 395 mthca_destroy_ah(to_mdev(ah->device), to_mah(ah)); 396 return 0; 397} 398 399static int mthca_create_srq(struct ib_srq *ibsrq, 400 struct ib_srq_init_attr *init_attr, 401 struct ib_udata *udata) 402{ 403 struct mthca_create_srq ucmd; 404 struct mthca_ucontext *context = rdma_udata_to_drv_context( 405 udata, struct mthca_ucontext, ibucontext); 406 struct mthca_srq *srq = to_msrq(ibsrq); 407 int err; 408 409 if (init_attr->srq_type != IB_SRQT_BASIC) 410 return -EOPNOTSUPP; 411 412 if (udata) { 413 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) 414 return -EFAULT; 415 416 err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar, 417 context->db_tab, ucmd.db_index, 418 ucmd.db_page); 419 420 if (err) 421 return err; 422 423 srq->mr.ibmr.lkey = ucmd.lkey; 424 srq->db_index = ucmd.db_index; 425 } 426 427 err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd), 428 &init_attr->attr, srq, udata); 429 430 if (err && udata) 431 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar, 432 context->db_tab, ucmd.db_index); 433 434 if (err) 435 return err; 436 437 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) { 438 mthca_free_srq(to_mdev(ibsrq->device), srq); 439 return -EFAULT; 440 } 441 442 return 0; 443} 444 445static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata) 446{ 447 if (udata) { 448 struct mthca_ucontext *context = 449 rdma_udata_to_drv_context( 450 udata, 451 struct mthca_ucontext, 452 ibucontext); 453 454 mthca_unmap_user_db(to_mdev(srq->device), &context->uar, 455 context->db_tab, to_msrq(srq)->db_index); 456 } 457 458 mthca_free_srq(to_mdev(srq->device), to_msrq(srq)); 459 return 0; 460} 461 462static struct ib_qp *mthca_create_qp(struct ib_pd *pd, 463 struct ib_qp_init_attr *init_attr, 464 struct ib_udata *udata) 465{ 466 struct mthca_ucontext *context = rdma_udata_to_drv_context( 467 udata, struct mthca_ucontext, ibucontext); 468 struct mthca_create_qp ucmd; 469 struct mthca_qp *qp; 470 int err; 471 472 if (init_attr->create_flags) 473 return ERR_PTR(-EINVAL); 474 475 switch (init_attr->qp_type) { 476 case IB_QPT_RC: 477 case IB_QPT_UC: 478 case IB_QPT_UD: 479 { 480 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 481 if (!qp) 482 return ERR_PTR(-ENOMEM); 483 484 if (udata) { 485 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 486 kfree(qp); 487 return ERR_PTR(-EFAULT); 488 } 489 490 err = mthca_map_user_db(to_mdev(pd->device), &context->uar, 491 context->db_tab, 492 ucmd.sq_db_index, ucmd.sq_db_page); 493 if (err) { 494 kfree(qp); 495 return ERR_PTR(err); 496 } 497 498 err = mthca_map_user_db(to_mdev(pd->device), &context->uar, 499 context->db_tab, 500 ucmd.rq_db_index, ucmd.rq_db_page); 501 if (err) { 502 mthca_unmap_user_db(to_mdev(pd->device), 503 &context->uar, 504 context->db_tab, 505 ucmd.sq_db_index); 506 kfree(qp); 507 return ERR_PTR(err); 508 } 509 510 qp->mr.ibmr.lkey = ucmd.lkey; 511 qp->sq.db_index = ucmd.sq_db_index; 512 qp->rq.db_index = ucmd.rq_db_index; 513 } 514 515 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd), 516 to_mcq(init_attr->send_cq), 517 to_mcq(init_attr->recv_cq), 518 init_attr->qp_type, init_attr->sq_sig_type, 519 &init_attr->cap, qp, udata); 520 521 if (err && udata) { 522 mthca_unmap_user_db(to_mdev(pd->device), 523 &context->uar, 524 context->db_tab, 525 ucmd.sq_db_index); 526 mthca_unmap_user_db(to_mdev(pd->device), 527 &context->uar, 528 context->db_tab, 529 ucmd.rq_db_index); 530 } 531 532 qp->ibqp.qp_num = qp->qpn; 533 break; 534 } 535 case IB_QPT_SMI: 536 case IB_QPT_GSI: 537 { 538 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 539 if (!qp) 540 return ERR_PTR(-ENOMEM); 541 qp->sqp = kzalloc(sizeof(struct mthca_sqp), GFP_KERNEL); 542 if (!qp->sqp) { 543 kfree(qp); 544 return ERR_PTR(-ENOMEM); 545 } 546 547 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; 548 549 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd), 550 to_mcq(init_attr->send_cq), 551 to_mcq(init_attr->recv_cq), 552 init_attr->sq_sig_type, &init_attr->cap, 553 qp->ibqp.qp_num, init_attr->port_num, 554 qp, udata); 555 break; 556 } 557 default: 558 /* Don't support raw QPs */ 559 return ERR_PTR(-EOPNOTSUPP); 560 } 561 562 if (err) { 563 kfree(qp->sqp); 564 kfree(qp); 565 return ERR_PTR(err); 566 } 567 568 init_attr->cap.max_send_wr = qp->sq.max; 569 init_attr->cap.max_recv_wr = qp->rq.max; 570 init_attr->cap.max_send_sge = qp->sq.max_gs; 571 init_attr->cap.max_recv_sge = qp->rq.max_gs; 572 init_attr->cap.max_inline_data = qp->max_inline_data; 573 574 return &qp->ibqp; 575} 576 577static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 578{ 579 if (udata) { 580 struct mthca_ucontext *context = 581 rdma_udata_to_drv_context( 582 udata, 583 struct mthca_ucontext, 584 ibucontext); 585 586 mthca_unmap_user_db(to_mdev(qp->device), 587 &context->uar, 588 context->db_tab, 589 to_mqp(qp)->sq.db_index); 590 mthca_unmap_user_db(to_mdev(qp->device), 591 &context->uar, 592 context->db_tab, 593 to_mqp(qp)->rq.db_index); 594 } 595 mthca_free_qp(to_mdev(qp->device), to_mqp(qp)); 596 kfree(to_mqp(qp)->sqp); 597 kfree(to_mqp(qp)); 598 return 0; 599} 600 601static int mthca_create_cq(struct ib_cq *ibcq, 602 const struct ib_cq_init_attr *attr, 603 struct ib_udata *udata) 604{ 605 struct ib_device *ibdev = ibcq->device; 606 int entries = attr->cqe; 607 struct mthca_create_cq ucmd; 608 struct mthca_cq *cq; 609 int nent; 610 int err; 611 struct mthca_ucontext *context = rdma_udata_to_drv_context( 612 udata, struct mthca_ucontext, ibucontext); 613 614 if (attr->flags) 615 return -EINVAL; 616 617 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes) 618 return -EINVAL; 619 620 if (udata) { 621 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) 622 return -EFAULT; 623 624 err = mthca_map_user_db(to_mdev(ibdev), &context->uar, 625 context->db_tab, ucmd.set_db_index, 626 ucmd.set_db_page); 627 if (err) 628 return err; 629 630 err = mthca_map_user_db(to_mdev(ibdev), &context->uar, 631 context->db_tab, ucmd.arm_db_index, 632 ucmd.arm_db_page); 633 if (err) 634 goto err_unmap_set; 635 } 636 637 cq = to_mcq(ibcq); 638 639 if (udata) { 640 cq->buf.mr.ibmr.lkey = ucmd.lkey; 641 cq->set_ci_db_index = ucmd.set_db_index; 642 cq->arm_db_index = ucmd.arm_db_index; 643 } 644 645 for (nent = 1; nent <= entries; nent <<= 1) 646 ; /* nothing */ 647 648 err = mthca_init_cq(to_mdev(ibdev), nent, context, 649 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num, 650 cq); 651 if (err) 652 goto err_unmap_arm; 653 654 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) { 655 mthca_free_cq(to_mdev(ibdev), cq); 656 err = -EFAULT; 657 goto err_unmap_arm; 658 } 659 660 cq->resize_buf = NULL; 661 662 return 0; 663 664err_unmap_arm: 665 if (udata) 666 mthca_unmap_user_db(to_mdev(ibdev), &context->uar, 667 context->db_tab, ucmd.arm_db_index); 668 669err_unmap_set: 670 if (udata) 671 mthca_unmap_user_db(to_mdev(ibdev), &context->uar, 672 context->db_tab, ucmd.set_db_index); 673 674 return err; 675} 676 677static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq, 678 int entries) 679{ 680 int ret; 681 682 spin_lock_irq(&cq->lock); 683 if (cq->resize_buf) { 684 ret = -EBUSY; 685 goto unlock; 686 } 687 688 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC); 689 if (!cq->resize_buf) { 690 ret = -ENOMEM; 691 goto unlock; 692 } 693 694 cq->resize_buf->state = CQ_RESIZE_ALLOC; 695 696 ret = 0; 697 698unlock: 699 spin_unlock_irq(&cq->lock); 700 701 if (ret) 702 return ret; 703 704 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries); 705 if (ret) { 706 spin_lock_irq(&cq->lock); 707 kfree(cq->resize_buf); 708 cq->resize_buf = NULL; 709 spin_unlock_irq(&cq->lock); 710 return ret; 711 } 712 713 cq->resize_buf->cqe = entries - 1; 714 715 spin_lock_irq(&cq->lock); 716 cq->resize_buf->state = CQ_RESIZE_READY; 717 spin_unlock_irq(&cq->lock); 718 719 return 0; 720} 721 722static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) 723{ 724 struct mthca_dev *dev = to_mdev(ibcq->device); 725 struct mthca_cq *cq = to_mcq(ibcq); 726 struct mthca_resize_cq ucmd; 727 u32 lkey; 728 int ret; 729 730 if (entries < 1 || entries > dev->limits.max_cqes) 731 return -EINVAL; 732 733 mutex_lock(&cq->mutex); 734 735 entries = roundup_pow_of_two(entries + 1); 736 if (entries == ibcq->cqe + 1) { 737 ret = 0; 738 goto out; 739 } 740 741 if (cq->is_kernel) { 742 ret = mthca_alloc_resize_buf(dev, cq, entries); 743 if (ret) 744 goto out; 745 lkey = cq->resize_buf->buf.mr.ibmr.lkey; 746 } else { 747 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 748 ret = -EFAULT; 749 goto out; 750 } 751 lkey = ucmd.lkey; 752 } 753 754 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries)); 755 756 if (ret) { 757 if (cq->resize_buf) { 758 mthca_free_cq_buf(dev, &cq->resize_buf->buf, 759 cq->resize_buf->cqe); 760 kfree(cq->resize_buf); 761 spin_lock_irq(&cq->lock); 762 cq->resize_buf = NULL; 763 spin_unlock_irq(&cq->lock); 764 } 765 goto out; 766 } 767 768 if (cq->is_kernel) { 769 struct mthca_cq_buf tbuf; 770 int tcqe; 771 772 spin_lock_irq(&cq->lock); 773 if (cq->resize_buf->state == CQ_RESIZE_READY) { 774 mthca_cq_resize_copy_cqes(cq); 775 tbuf = cq->buf; 776 tcqe = cq->ibcq.cqe; 777 cq->buf = cq->resize_buf->buf; 778 cq->ibcq.cqe = cq->resize_buf->cqe; 779 } else { 780 tbuf = cq->resize_buf->buf; 781 tcqe = cq->resize_buf->cqe; 782 } 783 784 kfree(cq->resize_buf); 785 cq->resize_buf = NULL; 786 spin_unlock_irq(&cq->lock); 787 788 mthca_free_cq_buf(dev, &tbuf, tcqe); 789 } else 790 ibcq->cqe = entries - 1; 791 792out: 793 mutex_unlock(&cq->mutex); 794 795 return ret; 796} 797 798static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) 799{ 800 if (udata) { 801 struct mthca_ucontext *context = 802 rdma_udata_to_drv_context( 803 udata, 804 struct mthca_ucontext, 805 ibucontext); 806 807 mthca_unmap_user_db(to_mdev(cq->device), 808 &context->uar, 809 context->db_tab, 810 to_mcq(cq)->arm_db_index); 811 mthca_unmap_user_db(to_mdev(cq->device), 812 &context->uar, 813 context->db_tab, 814 to_mcq(cq)->set_ci_db_index); 815 } 816 mthca_free_cq(to_mdev(cq->device), to_mcq(cq)); 817 return 0; 818} 819 820static inline u32 convert_access(int acc) 821{ 822 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) | 823 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) | 824 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) | 825 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) | 826 MTHCA_MPT_FLAG_LOCAL_READ; 827} 828 829static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc) 830{ 831 struct mthca_mr *mr; 832 int err; 833 834 mr = kmalloc(sizeof *mr, GFP_KERNEL); 835 if (!mr) 836 return ERR_PTR(-ENOMEM); 837 838 err = mthca_mr_alloc_notrans(to_mdev(pd->device), 839 to_mpd(pd)->pd_num, 840 convert_access(acc), mr); 841 842 if (err) { 843 kfree(mr); 844 return ERR_PTR(err); 845 } 846 847 mr->umem = NULL; 848 849 return &mr->ibmr; 850} 851 852static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 853 u64 virt, int acc, struct ib_udata *udata) 854{ 855 struct mthca_dev *dev = to_mdev(pd->device); 856 struct ib_block_iter biter; 857 struct mthca_ucontext *context = rdma_udata_to_drv_context( 858 udata, struct mthca_ucontext, ibucontext); 859 struct mthca_mr *mr; 860 struct mthca_reg_mr ucmd; 861 u64 *pages; 862 int n, i; 863 int err = 0; 864 int write_mtt_size; 865 866 if (udata->inlen < sizeof ucmd) { 867 if (!context->reg_mr_warned) { 868 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n", 869 current->comm); 870 mthca_warn(dev, " Update libmthca to fix this.\n"); 871 } 872 ++context->reg_mr_warned; 873 ucmd.mr_attrs = 0; 874 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) 875 return ERR_PTR(-EFAULT); 876 877 mr = kmalloc(sizeof *mr, GFP_KERNEL); 878 if (!mr) 879 return ERR_PTR(-ENOMEM); 880 881 mr->umem = ib_umem_get(pd->device, start, length, acc); 882 if (IS_ERR(mr->umem)) { 883 err = PTR_ERR(mr->umem); 884 goto err; 885 } 886 887 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE); 888 889 mr->mtt = mthca_alloc_mtt(dev, n); 890 if (IS_ERR(mr->mtt)) { 891 err = PTR_ERR(mr->mtt); 892 goto err_umem; 893 } 894 895 pages = (u64 *) __get_free_page(GFP_KERNEL); 896 if (!pages) { 897 err = -ENOMEM; 898 goto err_mtt; 899 } 900 901 i = n = 0; 902 903 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages)); 904 905 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) { 906 pages[i++] = rdma_block_iter_dma_address(&biter); 907 908 /* 909 * Be friendly to write_mtt and pass it chunks 910 * of appropriate size. 911 */ 912 if (i == write_mtt_size) { 913 err = mthca_write_mtt(dev, mr->mtt, n, pages, i); 914 if (err) 915 goto mtt_done; 916 n += i; 917 i = 0; 918 } 919 } 920 921 if (i) 922 err = mthca_write_mtt(dev, mr->mtt, n, pages, i); 923mtt_done: 924 free_page((unsigned long) pages); 925 if (err) 926 goto err_mtt; 927 928 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length, 929 convert_access(acc), mr); 930 931 if (err) 932 goto err_mtt; 933 934 return &mr->ibmr; 935 936err_mtt: 937 mthca_free_mtt(dev, mr->mtt); 938 939err_umem: 940 ib_umem_release(mr->umem); 941 942err: 943 kfree(mr); 944 return ERR_PTR(err); 945} 946 947static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata) 948{ 949 struct mthca_mr *mmr = to_mmr(mr); 950 951 mthca_free_mr(to_mdev(mr->device), mmr); 952 ib_umem_release(mmr->umem); 953 kfree(mmr); 954 955 return 0; 956} 957 958static ssize_t hw_rev_show(struct device *device, 959 struct device_attribute *attr, char *buf) 960{ 961 struct mthca_dev *dev = 962 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 963 964 return sprintf(buf, "%x\n", dev->rev_id); 965} 966static DEVICE_ATTR_RO(hw_rev); 967 968static ssize_t hca_type_show(struct device *device, 969 struct device_attribute *attr, char *buf) 970{ 971 struct mthca_dev *dev = 972 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 973 974 switch (dev->pdev->device) { 975 case PCI_DEVICE_ID_MELLANOX_TAVOR: 976 return sprintf(buf, "MT23108\n"); 977 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT: 978 return sprintf(buf, "MT25208 (MT23108 compat mode)\n"); 979 case PCI_DEVICE_ID_MELLANOX_ARBEL: 980 return sprintf(buf, "MT25208\n"); 981 case PCI_DEVICE_ID_MELLANOX_SINAI: 982 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD: 983 return sprintf(buf, "MT25204\n"); 984 default: 985 return sprintf(buf, "unknown\n"); 986 } 987} 988static DEVICE_ATTR_RO(hca_type); 989 990static ssize_t board_id_show(struct device *device, 991 struct device_attribute *attr, char *buf) 992{ 993 struct mthca_dev *dev = 994 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev); 995 996 return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id); 997} 998static DEVICE_ATTR_RO(board_id); 999 1000static struct attribute *mthca_dev_attributes[] = { 1001 &dev_attr_hw_rev.attr, 1002 &dev_attr_hca_type.attr, 1003 &dev_attr_board_id.attr, 1004 NULL 1005}; 1006 1007static const struct attribute_group mthca_attr_group = { 1008 .attrs = mthca_dev_attributes, 1009}; 1010 1011static int mthca_init_node_data(struct mthca_dev *dev) 1012{ 1013 struct ib_smp *in_mad = NULL; 1014 struct ib_smp *out_mad = NULL; 1015 int err = -ENOMEM; 1016 1017 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); 1018 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 1019 if (!in_mad || !out_mad) 1020 goto out; 1021 1022 init_query_mad(in_mad); 1023 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC; 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 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX); 1031 1032 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO; 1033 1034 err = mthca_MAD_IFC(dev, 1, 1, 1035 1, NULL, NULL, in_mad, out_mad); 1036 if (err) 1037 goto out; 1038 1039 if (mthca_is_memfree(dev)) 1040 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32)); 1041 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8); 1042 1043out: 1044 kfree(in_mad); 1045 kfree(out_mad); 1046 return err; 1047} 1048 1049static int mthca_port_immutable(struct ib_device *ibdev, u8 port_num, 1050 struct ib_port_immutable *immutable) 1051{ 1052 struct ib_port_attr attr; 1053 int err; 1054 1055 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB; 1056 1057 err = ib_query_port(ibdev, port_num, &attr); 1058 if (err) 1059 return err; 1060 1061 immutable->pkey_tbl_len = attr.pkey_tbl_len; 1062 immutable->gid_tbl_len = attr.gid_tbl_len; 1063 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 1064 1065 return 0; 1066} 1067 1068static void get_dev_fw_str(struct ib_device *device, char *str) 1069{ 1070 struct mthca_dev *dev = 1071 container_of(device, struct mthca_dev, ib_dev); 1072 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d", 1073 (int) (dev->fw_ver >> 32), 1074 (int) (dev->fw_ver >> 16) & 0xffff, 1075 (int) dev->fw_ver & 0xffff); 1076} 1077 1078static const struct ib_device_ops mthca_dev_ops = { 1079 .owner = THIS_MODULE, 1080 .driver_id = RDMA_DRIVER_MTHCA, 1081 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION, 1082 .uverbs_no_driver_id_binding = 1, 1083 1084 .alloc_pd = mthca_alloc_pd, 1085 .alloc_ucontext = mthca_alloc_ucontext, 1086 .attach_mcast = mthca_multicast_attach, 1087 .create_ah = mthca_ah_create, 1088 .create_cq = mthca_create_cq, 1089 .create_qp = mthca_create_qp, 1090 .dealloc_pd = mthca_dealloc_pd, 1091 .dealloc_ucontext = mthca_dealloc_ucontext, 1092 .dereg_mr = mthca_dereg_mr, 1093 .destroy_ah = mthca_ah_destroy, 1094 .destroy_cq = mthca_destroy_cq, 1095 .destroy_qp = mthca_destroy_qp, 1096 .detach_mcast = mthca_multicast_detach, 1097 .get_dev_fw_str = get_dev_fw_str, 1098 .get_dma_mr = mthca_get_dma_mr, 1099 .get_port_immutable = mthca_port_immutable, 1100 .mmap = mthca_mmap_uar, 1101 .modify_device = mthca_modify_device, 1102 .modify_port = mthca_modify_port, 1103 .modify_qp = mthca_modify_qp, 1104 .poll_cq = mthca_poll_cq, 1105 .process_mad = mthca_process_mad, 1106 .query_ah = mthca_ah_query, 1107 .query_device = mthca_query_device, 1108 .query_gid = mthca_query_gid, 1109 .query_pkey = mthca_query_pkey, 1110 .query_port = mthca_query_port, 1111 .query_qp = mthca_query_qp, 1112 .reg_user_mr = mthca_reg_user_mr, 1113 .resize_cq = mthca_resize_cq, 1114 1115 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah), 1116 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq), 1117 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd), 1118 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext), 1119}; 1120 1121static const struct ib_device_ops mthca_dev_arbel_srq_ops = { 1122 .create_srq = mthca_create_srq, 1123 .destroy_srq = mthca_destroy_srq, 1124 .modify_srq = mthca_modify_srq, 1125 .post_srq_recv = mthca_arbel_post_srq_recv, 1126 .query_srq = mthca_query_srq, 1127 1128 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), 1129}; 1130 1131static const struct ib_device_ops mthca_dev_tavor_srq_ops = { 1132 .create_srq = mthca_create_srq, 1133 .destroy_srq = mthca_destroy_srq, 1134 .modify_srq = mthca_modify_srq, 1135 .post_srq_recv = mthca_tavor_post_srq_recv, 1136 .query_srq = mthca_query_srq, 1137 1138 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq), 1139}; 1140 1141static const struct ib_device_ops mthca_dev_arbel_ops = { 1142 .post_recv = mthca_arbel_post_receive, 1143 .post_send = mthca_arbel_post_send, 1144 .req_notify_cq = mthca_arbel_arm_cq, 1145}; 1146 1147static const struct ib_device_ops mthca_dev_tavor_ops = { 1148 .post_recv = mthca_tavor_post_receive, 1149 .post_send = mthca_tavor_post_send, 1150 .req_notify_cq = mthca_tavor_arm_cq, 1151}; 1152 1153int mthca_register_device(struct mthca_dev *dev) 1154{ 1155 int ret; 1156 1157 ret = mthca_init_node_data(dev); 1158 if (ret) 1159 return ret; 1160 1161 dev->ib_dev.uverbs_cmd_mask = 1162 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 1163 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 1164 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 1165 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 1166 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 1167 (1ull << IB_USER_VERBS_CMD_REG_MR) | 1168 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 1169 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 1170 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 1171 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | 1172 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 1173 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 1174 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 1175 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 1176 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 1177 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 1178 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST); 1179 dev->ib_dev.node_type = RDMA_NODE_IB_CA; 1180 dev->ib_dev.phys_port_cnt = dev->limits.num_ports; 1181 dev->ib_dev.num_comp_vectors = 1; 1182 dev->ib_dev.dev.parent = &dev->pdev->dev; 1183 1184 if (dev->mthca_flags & MTHCA_FLAG_SRQ) { 1185 dev->ib_dev.uverbs_cmd_mask |= 1186 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | 1187 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | 1188 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | 1189 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ); 1190 1191 if (mthca_is_memfree(dev)) 1192 ib_set_device_ops(&dev->ib_dev, 1193 &mthca_dev_arbel_srq_ops); 1194 else 1195 ib_set_device_ops(&dev->ib_dev, 1196 &mthca_dev_tavor_srq_ops); 1197 } 1198 1199 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops); 1200 1201 if (mthca_is_memfree(dev)) 1202 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops); 1203 else 1204 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops); 1205 1206 mutex_init(&dev->cap_mask_mutex); 1207 1208 rdma_set_device_sysfs_group(&dev->ib_dev, &mthca_attr_group); 1209 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev); 1210 if (ret) 1211 return ret; 1212 1213 mthca_start_catas_poll(dev); 1214 1215 return 0; 1216} 1217 1218void mthca_unregister_device(struct mthca_dev *dev) 1219{ 1220 mthca_stop_catas_poll(dev); 1221 ib_unregister_device(&dev->ib_dev); 1222} 1223