1180 lines · c
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 two9 * licenses. You may choose to be licensed under the terms of the GNU10 * General Public License (GPL) Version 2, available from the file11 * COPYING in the main directory of this source tree, or the12 * OpenIB.org BSD license below:13 *14 * Redistribution and use in source and binary forms, with or15 * without modification, are permitted provided that the following16 * conditions are met:17 *18 * - Redistributions of source code must retain the above19 * copyright notice, this list of conditions and the following20 * disclaimer.21 *22 * - Redistributions in binary form must reproduce the above23 * copyright notice, this list of conditions and the following24 * disclaimer in the documentation and/or other materials25 * 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 OF29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE34 * 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 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 121static 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 170static 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 188static 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;212out:213 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);214 return err;215}216 217static 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 246static 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 286static 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 else301 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 325static 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 332static 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 348static 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 368static 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 374static 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 385static 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 391static 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 437static 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 454static 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 552static 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 575static int mthca_create_cq(struct ib_cq *ibcq,576 const struct ib_cq_init_attr *attr,577 struct uverbs_attr_bundle *attrs)578{579 struct ib_udata *udata = &attrs->driver_udata;580 struct ib_device *ibdev = ibcq->device;581 int entries = attr->cqe;582 struct mthca_create_cq ucmd;583 struct mthca_cq *cq;584 int nent;585 int err;586 struct mthca_ucontext *context = rdma_udata_to_drv_context(587 udata, struct mthca_ucontext, ibucontext);588 589 if (attr->flags)590 return -EOPNOTSUPP;591 592 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)593 return -EINVAL;594 595 if (udata) {596 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))597 return -EFAULT;598 599 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,600 context->db_tab, ucmd.set_db_index,601 ucmd.set_db_page);602 if (err)603 return err;604 605 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,606 context->db_tab, ucmd.arm_db_index,607 ucmd.arm_db_page);608 if (err)609 goto err_unmap_set;610 }611 612 cq = to_mcq(ibcq);613 614 if (udata) {615 cq->buf.mr.ibmr.lkey = ucmd.lkey;616 cq->set_ci_db_index = ucmd.set_db_index;617 cq->arm_db_index = ucmd.arm_db_index;618 }619 620 for (nent = 1; nent <= entries; nent <<= 1)621 ; /* nothing */622 623 err = mthca_init_cq(to_mdev(ibdev), nent, context,624 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,625 cq);626 if (err)627 goto err_unmap_arm;628 629 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) {630 mthca_free_cq(to_mdev(ibdev), cq);631 err = -EFAULT;632 goto err_unmap_arm;633 }634 635 cq->resize_buf = NULL;636 637 return 0;638 639err_unmap_arm:640 if (udata)641 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,642 context->db_tab, ucmd.arm_db_index);643 644err_unmap_set:645 if (udata)646 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,647 context->db_tab, ucmd.set_db_index);648 649 return err;650}651 652static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,653 int entries)654{655 int ret;656 657 spin_lock_irq(&cq->lock);658 if (cq->resize_buf) {659 ret = -EBUSY;660 goto unlock;661 }662 663 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);664 if (!cq->resize_buf) {665 ret = -ENOMEM;666 goto unlock;667 }668 669 cq->resize_buf->state = CQ_RESIZE_ALLOC;670 671 ret = 0;672 673unlock:674 spin_unlock_irq(&cq->lock);675 676 if (ret)677 return ret;678 679 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);680 if (ret) {681 spin_lock_irq(&cq->lock);682 kfree(cq->resize_buf);683 cq->resize_buf = NULL;684 spin_unlock_irq(&cq->lock);685 return ret;686 }687 688 cq->resize_buf->cqe = entries - 1;689 690 spin_lock_irq(&cq->lock);691 cq->resize_buf->state = CQ_RESIZE_READY;692 spin_unlock_irq(&cq->lock);693 694 return 0;695}696 697static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)698{699 struct mthca_dev *dev = to_mdev(ibcq->device);700 struct mthca_cq *cq = to_mcq(ibcq);701 struct mthca_resize_cq ucmd;702 u32 lkey;703 int ret;704 705 if (entries < 1 || entries > dev->limits.max_cqes)706 return -EINVAL;707 708 mutex_lock(&cq->mutex);709 710 entries = roundup_pow_of_two(entries + 1);711 if (entries == ibcq->cqe + 1) {712 ret = 0;713 goto out;714 }715 716 if (cq->is_kernel) {717 ret = mthca_alloc_resize_buf(dev, cq, entries);718 if (ret)719 goto out;720 lkey = cq->resize_buf->buf.mr.ibmr.lkey;721 } else {722 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {723 ret = -EFAULT;724 goto out;725 }726 lkey = ucmd.lkey;727 }728 729 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));730 731 if (ret) {732 if (cq->resize_buf) {733 mthca_free_cq_buf(dev, &cq->resize_buf->buf,734 cq->resize_buf->cqe);735 kfree(cq->resize_buf);736 spin_lock_irq(&cq->lock);737 cq->resize_buf = NULL;738 spin_unlock_irq(&cq->lock);739 }740 goto out;741 }742 743 if (cq->is_kernel) {744 struct mthca_cq_buf tbuf;745 int tcqe;746 747 spin_lock_irq(&cq->lock);748 if (cq->resize_buf->state == CQ_RESIZE_READY) {749 mthca_cq_resize_copy_cqes(cq);750 tbuf = cq->buf;751 tcqe = cq->ibcq.cqe;752 cq->buf = cq->resize_buf->buf;753 cq->ibcq.cqe = cq->resize_buf->cqe;754 } else {755 tbuf = cq->resize_buf->buf;756 tcqe = cq->resize_buf->cqe;757 }758 759 kfree(cq->resize_buf);760 cq->resize_buf = NULL;761 spin_unlock_irq(&cq->lock);762 763 mthca_free_cq_buf(dev, &tbuf, tcqe);764 } else765 ibcq->cqe = entries - 1;766 767out:768 mutex_unlock(&cq->mutex);769 770 return ret;771}772 773static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)774{775 if (udata) {776 struct mthca_ucontext *context =777 rdma_udata_to_drv_context(778 udata,779 struct mthca_ucontext,780 ibucontext);781 782 mthca_unmap_user_db(to_mdev(cq->device),783 &context->uar,784 context->db_tab,785 to_mcq(cq)->arm_db_index);786 mthca_unmap_user_db(to_mdev(cq->device),787 &context->uar,788 context->db_tab,789 to_mcq(cq)->set_ci_db_index);790 }791 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));792 return 0;793}794 795static inline u32 convert_access(int acc)796{797 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |798 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |799 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |800 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |801 MTHCA_MPT_FLAG_LOCAL_READ;802}803 804static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)805{806 struct mthca_mr *mr;807 int err;808 809 mr = kmalloc(sizeof *mr, GFP_KERNEL);810 if (!mr)811 return ERR_PTR(-ENOMEM);812 813 err = mthca_mr_alloc_notrans(to_mdev(pd->device),814 to_mpd(pd)->pd_num,815 convert_access(acc), mr);816 817 if (err) {818 kfree(mr);819 return ERR_PTR(err);820 }821 822 mr->umem = NULL;823 824 return &mr->ibmr;825}826 827static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,828 u64 virt, int acc, struct ib_udata *udata)829{830 struct mthca_dev *dev = to_mdev(pd->device);831 struct ib_block_iter biter;832 struct mthca_ucontext *context = rdma_udata_to_drv_context(833 udata, struct mthca_ucontext, ibucontext);834 struct mthca_mr *mr;835 struct mthca_reg_mr ucmd;836 u64 *pages;837 int n, i;838 int err = 0;839 int write_mtt_size;840 841 if (udata->inlen < sizeof ucmd) {842 if (!context->reg_mr_warned) {843 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",844 current->comm);845 mthca_warn(dev, " Update libmthca to fix this.\n");846 }847 ++context->reg_mr_warned;848 ucmd.mr_attrs = 0;849 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))850 return ERR_PTR(-EFAULT);851 852 mr = kmalloc(sizeof *mr, GFP_KERNEL);853 if (!mr)854 return ERR_PTR(-ENOMEM);855 856 mr->umem = ib_umem_get(pd->device, start, length, acc);857 if (IS_ERR(mr->umem)) {858 err = PTR_ERR(mr->umem);859 goto err;860 }861 862 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE);863 864 mr->mtt = mthca_alloc_mtt(dev, n);865 if (IS_ERR(mr->mtt)) {866 err = PTR_ERR(mr->mtt);867 goto err_umem;868 }869 870 pages = (u64 *) __get_free_page(GFP_KERNEL);871 if (!pages) {872 err = -ENOMEM;873 goto err_mtt;874 }875 876 i = n = 0;877 878 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));879 880 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) {881 pages[i++] = rdma_block_iter_dma_address(&biter);882 883 /*884 * Be friendly to write_mtt and pass it chunks885 * of appropriate size.886 */887 if (i == write_mtt_size) {888 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);889 if (err)890 goto mtt_done;891 n += i;892 i = 0;893 }894 }895 896 if (i)897 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);898mtt_done:899 free_page((unsigned long) pages);900 if (err)901 goto err_mtt;902 903 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length,904 convert_access(acc), mr);905 906 if (err)907 goto err_mtt;908 909 return &mr->ibmr;910 911err_mtt:912 mthca_free_mtt(dev, mr->mtt);913 914err_umem:915 ib_umem_release(mr->umem);916 917err:918 kfree(mr);919 return ERR_PTR(err);920}921 922static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata)923{924 struct mthca_mr *mmr = to_mmr(mr);925 926 mthca_free_mr(to_mdev(mr->device), mmr);927 ib_umem_release(mmr->umem);928 kfree(mmr);929 930 return 0;931}932 933static ssize_t hw_rev_show(struct device *device,934 struct device_attribute *attr, char *buf)935{936 struct mthca_dev *dev =937 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);938 939 return sysfs_emit(buf, "%x\n", dev->rev_id);940}941static DEVICE_ATTR_RO(hw_rev);942 943static const char *hca_type_string(int hca_type)944{945 switch (hca_type) {946 case PCI_DEVICE_ID_MELLANOX_TAVOR:947 return "MT23108";948 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:949 return "MT25208 (MT23108 compat mode)";950 case PCI_DEVICE_ID_MELLANOX_ARBEL:951 return "MT25208";952 case PCI_DEVICE_ID_MELLANOX_SINAI:953 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:954 return "MT25204";955 }956 957 return "unknown";958}959 960static ssize_t hca_type_show(struct device *device,961 struct device_attribute *attr, char *buf)962{963 struct mthca_dev *dev =964 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);965 966 return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device));967}968static DEVICE_ATTR_RO(hca_type);969 970static ssize_t board_id_show(struct device *device,971 struct device_attribute *attr, char *buf)972{973 struct mthca_dev *dev =974 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);975 976 return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);977}978static DEVICE_ATTR_RO(board_id);979 980static struct attribute *mthca_dev_attributes[] = {981 &dev_attr_hw_rev.attr,982 &dev_attr_hca_type.attr,983 &dev_attr_board_id.attr,984 NULL985};986 987static const struct attribute_group mthca_attr_group = {988 .attrs = mthca_dev_attributes,989};990 991static int mthca_init_node_data(struct mthca_dev *dev)992{993 struct ib_smp *in_mad;994 struct ib_smp *out_mad;995 int err = -ENOMEM;996 997 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);998 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);999 if (!in_mad || !out_mad)1000 goto out;1001 1002 ib_init_query_mad(in_mad);1003 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;1004 1005 err = mthca_MAD_IFC(dev, 1, 1,1006 1, NULL, NULL, in_mad, out_mad);1007 if (err)1008 goto out;1009 1010 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);1011 1012 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;1013 1014 err = mthca_MAD_IFC(dev, 1, 1,1015 1, NULL, NULL, in_mad, out_mad);1016 if (err)1017 goto out;1018 1019 if (mthca_is_memfree(dev))1020 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));1021 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);1022 1023out:1024 kfree(in_mad);1025 kfree(out_mad);1026 return err;1027}1028 1029static int mthca_port_immutable(struct ib_device *ibdev, u32 port_num,1030 struct ib_port_immutable *immutable)1031{1032 struct ib_port_attr attr;1033 int err;1034 1035 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;1036 1037 err = ib_query_port(ibdev, port_num, &attr);1038 if (err)1039 return err;1040 1041 immutable->pkey_tbl_len = attr.pkey_tbl_len;1042 immutable->gid_tbl_len = attr.gid_tbl_len;1043 immutable->max_mad_size = IB_MGMT_MAD_SIZE;1044 1045 return 0;1046}1047 1048static void get_dev_fw_str(struct ib_device *device, char *str)1049{1050 struct mthca_dev *dev =1051 container_of(device, struct mthca_dev, ib_dev);1052 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d",1053 (int) (dev->fw_ver >> 32),1054 (int) (dev->fw_ver >> 16) & 0xffff,1055 (int) dev->fw_ver & 0xffff);1056}1057 1058static const struct ib_device_ops mthca_dev_ops = {1059 .owner = THIS_MODULE,1060 .driver_id = RDMA_DRIVER_MTHCA,1061 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION,1062 .uverbs_no_driver_id_binding = 1,1063 1064 .alloc_pd = mthca_alloc_pd,1065 .alloc_ucontext = mthca_alloc_ucontext,1066 .attach_mcast = mthca_multicast_attach,1067 .create_ah = mthca_ah_create,1068 .create_cq = mthca_create_cq,1069 .create_qp = mthca_create_qp,1070 .dealloc_pd = mthca_dealloc_pd,1071 .dealloc_ucontext = mthca_dealloc_ucontext,1072 .dereg_mr = mthca_dereg_mr,1073 .destroy_ah = mthca_ah_destroy,1074 .destroy_cq = mthca_destroy_cq,1075 .destroy_qp = mthca_destroy_qp,1076 .detach_mcast = mthca_multicast_detach,1077 .device_group = &mthca_attr_group,1078 .get_dev_fw_str = get_dev_fw_str,1079 .get_dma_mr = mthca_get_dma_mr,1080 .get_port_immutable = mthca_port_immutable,1081 .mmap = mthca_mmap_uar,1082 .modify_device = mthca_modify_device,1083 .modify_port = mthca_modify_port,1084 .modify_qp = mthca_modify_qp,1085 .poll_cq = mthca_poll_cq,1086 .process_mad = mthca_process_mad,1087 .query_ah = mthca_ah_query,1088 .query_device = mthca_query_device,1089 .query_gid = mthca_query_gid,1090 .query_pkey = mthca_query_pkey,1091 .query_port = mthca_query_port,1092 .query_qp = mthca_query_qp,1093 .reg_user_mr = mthca_reg_user_mr,1094 .resize_cq = mthca_resize_cq,1095 1096 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah),1097 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq),1098 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd),1099 INIT_RDMA_OBJ_SIZE(ib_qp, mthca_qp, ibqp),1100 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext),1101};1102 1103static const struct ib_device_ops mthca_dev_arbel_srq_ops = {1104 .create_srq = mthca_create_srq,1105 .destroy_srq = mthca_destroy_srq,1106 .modify_srq = mthca_modify_srq,1107 .post_srq_recv = mthca_arbel_post_srq_recv,1108 .query_srq = mthca_query_srq,1109 1110 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),1111};1112 1113static const struct ib_device_ops mthca_dev_tavor_srq_ops = {1114 .create_srq = mthca_create_srq,1115 .destroy_srq = mthca_destroy_srq,1116 .modify_srq = mthca_modify_srq,1117 .post_srq_recv = mthca_tavor_post_srq_recv,1118 .query_srq = mthca_query_srq,1119 1120 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),1121};1122 1123static const struct ib_device_ops mthca_dev_arbel_ops = {1124 .post_recv = mthca_arbel_post_receive,1125 .post_send = mthca_arbel_post_send,1126 .req_notify_cq = mthca_arbel_arm_cq,1127};1128 1129static const struct ib_device_ops mthca_dev_tavor_ops = {1130 .post_recv = mthca_tavor_post_receive,1131 .post_send = mthca_tavor_post_send,1132 .req_notify_cq = mthca_tavor_arm_cq,1133};1134 1135int mthca_register_device(struct mthca_dev *dev)1136{1137 int ret;1138 1139 ret = mthca_init_node_data(dev);1140 if (ret)1141 return ret;1142 1143 dev->ib_dev.node_type = RDMA_NODE_IB_CA;1144 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;1145 dev->ib_dev.num_comp_vectors = 1;1146 dev->ib_dev.dev.parent = &dev->pdev->dev;1147 1148 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {1149 if (mthca_is_memfree(dev))1150 ib_set_device_ops(&dev->ib_dev,1151 &mthca_dev_arbel_srq_ops);1152 else1153 ib_set_device_ops(&dev->ib_dev,1154 &mthca_dev_tavor_srq_ops);1155 }1156 1157 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops);1158 1159 if (mthca_is_memfree(dev))1160 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops);1161 else1162 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops);1163 1164 mutex_init(&dev->cap_mask_mutex);1165 1166 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev);1167 if (ret)1168 return ret;1169 1170 mthca_start_catas_poll(dev);1171 1172 return 0;1173}1174 1175void mthca_unregister_device(struct mthca_dev *dev)1176{1177 mthca_stop_catas_poll(dev);1178 ib_unregister_device(&dev->ib_dev);1179}1180