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1/*2 * Copyright (c) 2012-2016 VMware, Inc. All rights reserved.3 *4 * This program is free software; you can redistribute it and/or5 * modify it under the terms of EITHER the GNU General Public License6 * version 2 as published by the Free Software Foundation or the BSD7 * 2-Clause License. This program is distributed in the hope that it8 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED9 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.10 * See the GNU General Public License version 2 for more details at11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.12 *13 * You should have received a copy of the GNU General Public License14 * along with this program available in the file COPYING in the main15 * directory of this source tree.16 *17 * The BSD 2-Clause License18 *19 * Redistribution and use in source and binary forms, with or20 * without modification, are permitted provided that the following21 * conditions are met:22 *23 * - Redistributions of source code must retain the above24 * copyright notice, this list of conditions and the following25 * disclaimer.26 *27 * - Redistributions in binary form must reproduce the above28 * copyright notice, this list of conditions and the following29 * disclaimer in the documentation and/or other materials30 * provided with the distribution.31 *32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE36 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED43 * OF THE POSSIBILITY OF SUCH DAMAGE.44 */45 46#include <asm/page.h>47#include <linux/inet.h>48#include <linux/io.h>49#include <rdma/ib_addr.h>50#include <rdma/ib_smi.h>51#include <rdma/ib_user_verbs.h>52#include <rdma/vmw_pvrdma-abi.h>53#include <rdma/uverbs_ioctl.h>54 55#include "pvrdma.h"56 57/**58 * pvrdma_query_device - query device59 * @ibdev: the device to query60 * @props: the device properties61 * @uhw: user data62 *63 * @return: 0 on success, otherwise negative errno64 */65int pvrdma_query_device(struct ib_device *ibdev,66 struct ib_device_attr *props,67 struct ib_udata *uhw)68{69 struct pvrdma_dev *dev = to_vdev(ibdev);70 71 if (uhw->inlen || uhw->outlen)72 return -EINVAL;73 74 props->fw_ver = dev->dsr->caps.fw_ver;75 props->sys_image_guid = dev->dsr->caps.sys_image_guid;76 props->max_mr_size = dev->dsr->caps.max_mr_size;77 props->page_size_cap = dev->dsr->caps.page_size_cap;78 props->vendor_id = dev->dsr->caps.vendor_id;79 props->vendor_part_id = dev->pdev->device;80 props->hw_ver = dev->dsr->caps.hw_ver;81 props->max_qp = dev->dsr->caps.max_qp;82 props->max_qp_wr = dev->dsr->caps.max_qp_wr;83 props->device_cap_flags = dev->dsr->caps.device_cap_flags;84 props->max_send_sge = dev->dsr->caps.max_sge;85 props->max_recv_sge = dev->dsr->caps.max_sge;86 props->max_sge_rd = PVRDMA_GET_CAP(dev, dev->dsr->caps.max_sge,87 dev->dsr->caps.max_sge_rd);88 props->max_srq = dev->dsr->caps.max_srq;89 props->max_srq_wr = dev->dsr->caps.max_srq_wr;90 props->max_srq_sge = dev->dsr->caps.max_srq_sge;91 props->max_cq = dev->dsr->caps.max_cq;92 props->max_cqe = dev->dsr->caps.max_cqe;93 props->max_mr = dev->dsr->caps.max_mr;94 props->max_pd = dev->dsr->caps.max_pd;95 props->max_qp_rd_atom = dev->dsr->caps.max_qp_rd_atom;96 props->max_qp_init_rd_atom = dev->dsr->caps.max_qp_init_rd_atom;97 props->atomic_cap =98 dev->dsr->caps.atomic_ops &99 (PVRDMA_ATOMIC_OP_COMP_SWAP | PVRDMA_ATOMIC_OP_FETCH_ADD) ?100 IB_ATOMIC_HCA : IB_ATOMIC_NONE;101 props->masked_atomic_cap = props->atomic_cap;102 props->max_ah = dev->dsr->caps.max_ah;103 props->max_pkeys = dev->dsr->caps.max_pkeys;104 props->local_ca_ack_delay = dev->dsr->caps.local_ca_ack_delay;105 if ((dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_LOCAL_INV) &&106 (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_REMOTE_INV) &&107 (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_FAST_REG_WR)) {108 props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;109 props->max_fast_reg_page_list_len = PVRDMA_GET_CAP(dev,110 PVRDMA_MAX_FAST_REG_PAGES,111 dev->dsr->caps.max_fast_reg_page_list_len);112 }113 114 props->device_cap_flags |= IB_DEVICE_PORT_ACTIVE_EVENT |115 IB_DEVICE_RC_RNR_NAK_GEN;116 117 return 0;118}119 120/**121 * pvrdma_query_port - query device port attributes122 * @ibdev: the device to query123 * @port: the port number124 * @props: the device properties125 *126 * @return: 0 on success, otherwise negative errno127 */128int pvrdma_query_port(struct ib_device *ibdev, u32 port,129 struct ib_port_attr *props)130{131 struct pvrdma_dev *dev = to_vdev(ibdev);132 union pvrdma_cmd_req req;133 union pvrdma_cmd_resp rsp;134 struct pvrdma_cmd_query_port *cmd = &req.query_port;135 struct pvrdma_cmd_query_port_resp *resp = &rsp.query_port_resp;136 int err;137 138 memset(cmd, 0, sizeof(*cmd));139 cmd->hdr.cmd = PVRDMA_CMD_QUERY_PORT;140 cmd->port_num = port;141 142 err = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_PORT_RESP);143 if (err < 0) {144 dev_warn(&dev->pdev->dev,145 "could not query port, error: %d\n", err);146 return err;147 }148 149 /* props being zeroed by the caller, avoid zeroing it here */150 151 props->state = pvrdma_port_state_to_ib(resp->attrs.state);152 props->max_mtu = pvrdma_mtu_to_ib(resp->attrs.max_mtu);153 props->active_mtu = pvrdma_mtu_to_ib(resp->attrs.active_mtu);154 props->gid_tbl_len = resp->attrs.gid_tbl_len;155 props->port_cap_flags =156 pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags);157 props->port_cap_flags |= IB_PORT_CM_SUP;158 props->ip_gids = true;159 props->max_msg_sz = resp->attrs.max_msg_sz;160 props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr;161 props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr;162 props->pkey_tbl_len = resp->attrs.pkey_tbl_len;163 props->lid = resp->attrs.lid;164 props->sm_lid = resp->attrs.sm_lid;165 props->lmc = resp->attrs.lmc;166 props->max_vl_num = resp->attrs.max_vl_num;167 props->sm_sl = resp->attrs.sm_sl;168 props->subnet_timeout = resp->attrs.subnet_timeout;169 props->init_type_reply = resp->attrs.init_type_reply;170 props->active_width = pvrdma_port_width_to_ib(resp->attrs.active_width);171 props->active_speed = pvrdma_port_speed_to_ib(resp->attrs.active_speed);172 props->phys_state = resp->attrs.phys_state;173 174 return 0;175}176 177/**178 * pvrdma_query_gid - query device gid179 * @ibdev: the device to query180 * @port: the port number181 * @index: the index182 * @gid: the device gid value183 *184 * @return: 0 on success, otherwise negative errno185 */186int pvrdma_query_gid(struct ib_device *ibdev, u32 port, int index,187 union ib_gid *gid)188{189 struct pvrdma_dev *dev = to_vdev(ibdev);190 191 if (index >= dev->dsr->caps.gid_tbl_len)192 return -EINVAL;193 194 memcpy(gid, &dev->sgid_tbl[index], sizeof(union ib_gid));195 196 return 0;197}198 199/**200 * pvrdma_query_pkey - query device port's P_Key table201 * @ibdev: the device to query202 * @port: the port number203 * @index: the index204 * @pkey: the device P_Key value205 *206 * @return: 0 on success, otherwise negative errno207 */208int pvrdma_query_pkey(struct ib_device *ibdev, u32 port, u16 index,209 u16 *pkey)210{211 int err = 0;212 union pvrdma_cmd_req req;213 union pvrdma_cmd_resp rsp;214 struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey;215 216 memset(cmd, 0, sizeof(*cmd));217 cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY;218 cmd->port_num = port;219 cmd->index = index;220 221 err = pvrdma_cmd_post(to_vdev(ibdev), &req, &rsp,222 PVRDMA_CMD_QUERY_PKEY_RESP);223 if (err < 0) {224 dev_warn(&to_vdev(ibdev)->pdev->dev,225 "could not query pkey, error: %d\n", err);226 return err;227 }228 229 *pkey = rsp.query_pkey_resp.pkey;230 231 return 0;232}233 234enum rdma_link_layer pvrdma_port_link_layer(struct ib_device *ibdev,235 u32 port)236{237 return IB_LINK_LAYER_ETHERNET;238}239 240int pvrdma_modify_device(struct ib_device *ibdev, int mask,241 struct ib_device_modify *props)242{243 unsigned long flags;244 245 if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |246 IB_DEVICE_MODIFY_NODE_DESC)) {247 dev_warn(&to_vdev(ibdev)->pdev->dev,248 "unsupported device modify mask %#x\n", mask);249 return -EOPNOTSUPP;250 }251 252 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {253 spin_lock_irqsave(&to_vdev(ibdev)->desc_lock, flags);254 memcpy(ibdev->node_desc, props->node_desc, 64);255 spin_unlock_irqrestore(&to_vdev(ibdev)->desc_lock, flags);256 }257 258 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {259 mutex_lock(&to_vdev(ibdev)->port_mutex);260 to_vdev(ibdev)->sys_image_guid =261 cpu_to_be64(props->sys_image_guid);262 mutex_unlock(&to_vdev(ibdev)->port_mutex);263 }264 265 return 0;266}267 268/**269 * pvrdma_modify_port - modify device port attributes270 * @ibdev: the device to modify271 * @port: the port number272 * @mask: attributes to modify273 * @props: the device properties274 *275 * @return: 0 on success, otherwise negative errno276 */277int pvrdma_modify_port(struct ib_device *ibdev, u32 port, int mask,278 struct ib_port_modify *props)279{280 struct ib_port_attr attr;281 struct pvrdma_dev *vdev = to_vdev(ibdev);282 int ret;283 284 if (mask & ~IB_PORT_SHUTDOWN) {285 dev_warn(&vdev->pdev->dev,286 "unsupported port modify mask %#x\n", mask);287 return -EOPNOTSUPP;288 }289 290 mutex_lock(&vdev->port_mutex);291 ret = ib_query_port(ibdev, port, &attr);292 if (ret)293 goto out;294 295 vdev->port_cap_mask |= props->set_port_cap_mask;296 vdev->port_cap_mask &= ~props->clr_port_cap_mask;297 298 if (mask & IB_PORT_SHUTDOWN)299 vdev->ib_active = false;300 301out:302 mutex_unlock(&vdev->port_mutex);303 return ret;304}305 306/**307 * pvrdma_alloc_ucontext - allocate ucontext308 * @uctx: the uverbs countext309 * @udata: user data310 *311 * @return: zero on success, otherwise errno.312 */313int pvrdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)314{315 struct ib_device *ibdev = uctx->device;316 struct pvrdma_dev *vdev = to_vdev(ibdev);317 struct pvrdma_ucontext *context = to_vucontext(uctx);318 union pvrdma_cmd_req req = {};319 union pvrdma_cmd_resp rsp = {};320 struct pvrdma_cmd_create_uc *cmd = &req.create_uc;321 struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp;322 struct pvrdma_alloc_ucontext_resp uresp = {};323 int ret;324 325 if (!vdev->ib_active)326 return -EAGAIN;327 328 context->dev = vdev;329 ret = pvrdma_uar_alloc(vdev, &context->uar);330 if (ret)331 return -ENOMEM;332 333 /* get ctx_handle from host */334 if (vdev->dsr_version < PVRDMA_PPN64_VERSION)335 cmd->pfn = context->uar.pfn;336 else337 cmd->pfn64 = context->uar.pfn;338 339 cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC;340 ret = pvrdma_cmd_post(vdev, &req, &rsp, PVRDMA_CMD_CREATE_UC_RESP);341 if (ret < 0) {342 dev_warn(&vdev->pdev->dev,343 "could not create ucontext, error: %d\n", ret);344 goto err;345 }346 347 context->ctx_handle = resp->ctx_handle;348 349 /* copy back to user */350 uresp.qp_tab_size = vdev->dsr->caps.max_qp;351 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));352 if (ret) {353 pvrdma_uar_free(vdev, &context->uar);354 pvrdma_dealloc_ucontext(&context->ibucontext);355 return -EFAULT;356 }357 358 return 0;359 360err:361 pvrdma_uar_free(vdev, &context->uar);362 return ret;363}364 365/**366 * pvrdma_dealloc_ucontext - deallocate ucontext367 * @ibcontext: the ucontext368 */369void pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext)370{371 struct pvrdma_ucontext *context = to_vucontext(ibcontext);372 union pvrdma_cmd_req req = {};373 struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc;374 int ret;375 376 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC;377 cmd->ctx_handle = context->ctx_handle;378 379 ret = pvrdma_cmd_post(context->dev, &req, NULL, 0);380 if (ret < 0)381 dev_warn(&context->dev->pdev->dev,382 "destroy ucontext failed, error: %d\n", ret);383 384 /* Free the UAR even if the device command failed */385 pvrdma_uar_free(to_vdev(ibcontext->device), &context->uar);386}387 388/**389 * pvrdma_mmap - create mmap region390 * @ibcontext: the user context391 * @vma: the VMA392 *393 * @return: 0 on success, otherwise errno.394 */395int pvrdma_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)396{397 struct pvrdma_ucontext *context = to_vucontext(ibcontext);398 unsigned long start = vma->vm_start;399 unsigned long size = vma->vm_end - vma->vm_start;400 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;401 402 dev_dbg(&context->dev->pdev->dev, "create mmap region\n");403 404 if ((size != PAGE_SIZE) || (offset & ~PAGE_MASK)) {405 dev_warn(&context->dev->pdev->dev,406 "invalid params for mmap region\n");407 return -EINVAL;408 }409 410 /* Map UAR to kernel space, VM_LOCKED? */411 vm_flags_set(vma, VM_DONTCOPY | VM_DONTEXPAND);412 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);413 if (io_remap_pfn_range(vma, start, context->uar.pfn, size,414 vma->vm_page_prot))415 return -EAGAIN;416 417 return 0;418}419 420/**421 * pvrdma_alloc_pd - allocate protection domain422 * @ibpd: PD pointer423 * @udata: user data424 *425 * @return: the ib_pd protection domain pointer on success, otherwise errno.426 */427int pvrdma_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)428{429 struct ib_device *ibdev = ibpd->device;430 struct pvrdma_pd *pd = to_vpd(ibpd);431 struct pvrdma_dev *dev = to_vdev(ibdev);432 union pvrdma_cmd_req req = {};433 union pvrdma_cmd_resp rsp = {};434 struct pvrdma_cmd_create_pd *cmd = &req.create_pd;435 struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp;436 struct pvrdma_alloc_pd_resp pd_resp = {0};437 int ret;438 struct pvrdma_ucontext *context = rdma_udata_to_drv_context(439 udata, struct pvrdma_ucontext, ibucontext);440 441 /* Check allowed max pds */442 if (!atomic_add_unless(&dev->num_pds, 1, dev->dsr->caps.max_pd))443 return -ENOMEM;444 445 cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD;446 cmd->ctx_handle = context ? context->ctx_handle : 0;447 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_PD_RESP);448 if (ret < 0) {449 dev_warn(&dev->pdev->dev,450 "failed to allocate protection domain, error: %d\n",451 ret);452 goto err;453 }454 455 pd->privileged = !udata;456 pd->pd_handle = resp->pd_handle;457 pd->pdn = resp->pd_handle;458 pd_resp.pdn = resp->pd_handle;459 460 if (udata) {461 if (ib_copy_to_udata(udata, &pd_resp, sizeof(pd_resp))) {462 dev_warn(&dev->pdev->dev,463 "failed to copy back protection domain\n");464 pvrdma_dealloc_pd(&pd->ibpd, udata);465 return -EFAULT;466 }467 }468 469 /* u32 pd handle */470 return 0;471 472err:473 atomic_dec(&dev->num_pds);474 return ret;475}476 477/**478 * pvrdma_dealloc_pd - deallocate protection domain479 * @pd: the protection domain to be released480 * @udata: user data or null for kernel object481 *482 * @return: Always 0483 */484int pvrdma_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)485{486 struct pvrdma_dev *dev = to_vdev(pd->device);487 union pvrdma_cmd_req req = {};488 struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd;489 int ret;490 491 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD;492 cmd->pd_handle = to_vpd(pd)->pd_handle;493 494 ret = pvrdma_cmd_post(dev, &req, NULL, 0);495 if (ret)496 dev_warn(&dev->pdev->dev,497 "could not dealloc protection domain, error: %d\n",498 ret);499 500 atomic_dec(&dev->num_pds);501 return 0;502}503 504/**505 * pvrdma_create_ah - create an address handle506 * @ibah: the IB address handle507 * @init_attr: the attributes of the AH508 * @udata: pointer to user data509 *510 * @return: 0 on success, otherwise errno.511 */512int pvrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,513 struct ib_udata *udata)514{515 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;516 struct pvrdma_dev *dev = to_vdev(ibah->device);517 struct pvrdma_ah *ah = to_vah(ibah);518 const struct ib_global_route *grh;519 u32 port_num = rdma_ah_get_port_num(ah_attr);520 521 if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))522 return -EINVAL;523 524 grh = rdma_ah_read_grh(ah_attr);525 if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||526 rdma_is_multicast_addr((struct in6_addr *)grh->dgid.raw))527 return -EINVAL;528 529 if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah))530 return -ENOMEM;531 532 ah->av.port_pd = to_vpd(ibah->pd)->pd_handle | (port_num << 24);533 ah->av.src_path_bits = rdma_ah_get_path_bits(ah_attr);534 ah->av.src_path_bits |= 0x80;535 ah->av.gid_index = grh->sgid_index;536 ah->av.hop_limit = grh->hop_limit;537 ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) |538 grh->flow_label;539 memcpy(ah->av.dgid, grh->dgid.raw, 16);540 memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN);541 542 return 0;543}544 545/**546 * pvrdma_destroy_ah - destroy an address handle547 * @ah: the address handle to destroyed548 * @flags: destroy address handle flags (see enum rdma_destroy_ah_flags)549 *550 */551int pvrdma_destroy_ah(struct ib_ah *ah, u32 flags)552{553 struct pvrdma_dev *dev = to_vdev(ah->device);554 555 atomic_dec(&dev->num_ahs);556 return 0;557}558