129c8d9ebSAdit Ranadive /* 229c8d9ebSAdit Ranadive * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. 329c8d9ebSAdit Ranadive * 429c8d9ebSAdit Ranadive * This program is free software; you can redistribute it and/or 529c8d9ebSAdit Ranadive * modify it under the terms of EITHER the GNU General Public License 629c8d9ebSAdit Ranadive * version 2 as published by the Free Software Foundation or the BSD 729c8d9ebSAdit Ranadive * 2-Clause License. This program is distributed in the hope that it 829c8d9ebSAdit Ranadive * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED 929c8d9ebSAdit Ranadive * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 1029c8d9ebSAdit Ranadive * See the GNU General Public License version 2 for more details at 1129c8d9ebSAdit Ranadive * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. 1229c8d9ebSAdit Ranadive * 1329c8d9ebSAdit Ranadive * You should have received a copy of the GNU General Public License 1429c8d9ebSAdit Ranadive * along with this program available in the file COPYING in the main 1529c8d9ebSAdit Ranadive * directory of this source tree. 1629c8d9ebSAdit Ranadive * 1729c8d9ebSAdit Ranadive * The BSD 2-Clause License 1829c8d9ebSAdit Ranadive * 1929c8d9ebSAdit Ranadive * Redistribution and use in source and binary forms, with or 2029c8d9ebSAdit Ranadive * without modification, are permitted provided that the following 2129c8d9ebSAdit Ranadive * conditions are met: 2229c8d9ebSAdit Ranadive * 2329c8d9ebSAdit Ranadive * - Redistributions of source code must retain the above 2429c8d9ebSAdit Ranadive * copyright notice, this list of conditions and the following 2529c8d9ebSAdit Ranadive * disclaimer. 2629c8d9ebSAdit Ranadive * 2729c8d9ebSAdit Ranadive * - Redistributions in binary form must reproduce the above 2829c8d9ebSAdit Ranadive * copyright notice, this list of conditions and the following 2929c8d9ebSAdit Ranadive * disclaimer in the documentation and/or other materials 3029c8d9ebSAdit Ranadive * provided with the distribution. 3129c8d9ebSAdit Ranadive * 3229c8d9ebSAdit Ranadive * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 3329c8d9ebSAdit Ranadive * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3429c8d9ebSAdit Ranadive * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 3529c8d9ebSAdit Ranadive * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 3629c8d9ebSAdit Ranadive * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 3729c8d9ebSAdit Ranadive * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 3829c8d9ebSAdit Ranadive * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 3929c8d9ebSAdit Ranadive * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4029c8d9ebSAdit Ranadive * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4129c8d9ebSAdit Ranadive * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 4229c8d9ebSAdit Ranadive * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 4329c8d9ebSAdit Ranadive * OF THE POSSIBILITY OF SUCH DAMAGE. 4429c8d9ebSAdit Ranadive */ 4529c8d9ebSAdit Ranadive 4629c8d9ebSAdit Ranadive #include <linux/list.h> 4729c8d9ebSAdit Ranadive #include <linux/slab.h> 4829c8d9ebSAdit Ranadive 4929c8d9ebSAdit Ranadive #include "pvrdma.h" 5029c8d9ebSAdit Ranadive 5129c8d9ebSAdit Ranadive /** 5229c8d9ebSAdit Ranadive * pvrdma_get_dma_mr - get a DMA memory region 5329c8d9ebSAdit Ranadive * @pd: protection domain 5429c8d9ebSAdit Ranadive * @acc: access flags 5529c8d9ebSAdit Ranadive * 5629c8d9ebSAdit Ranadive * @return: ib_mr pointer on success, otherwise returns an errno. 5729c8d9ebSAdit Ranadive */ 5829c8d9ebSAdit Ranadive struct ib_mr *pvrdma_get_dma_mr(struct ib_pd *pd, int acc) 5929c8d9ebSAdit Ranadive { 6029c8d9ebSAdit Ranadive struct pvrdma_dev *dev = to_vdev(pd->device); 6129c8d9ebSAdit Ranadive struct pvrdma_user_mr *mr; 6229c8d9ebSAdit Ranadive union pvrdma_cmd_req req; 6329c8d9ebSAdit Ranadive union pvrdma_cmd_resp rsp; 6429c8d9ebSAdit Ranadive struct pvrdma_cmd_create_mr *cmd = &req.create_mr; 6529c8d9ebSAdit Ranadive struct pvrdma_cmd_create_mr_resp *resp = &rsp.create_mr_resp; 6629c8d9ebSAdit Ranadive int ret; 6729c8d9ebSAdit Ranadive 6829c8d9ebSAdit Ranadive /* Support only LOCAL_WRITE flag for DMA MRs */ 6929c8d9ebSAdit Ranadive if (acc & ~IB_ACCESS_LOCAL_WRITE) { 7029c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 7129c8d9ebSAdit Ranadive "unsupported dma mr access flags %#x\n", acc); 7229c8d9ebSAdit Ranadive return ERR_PTR(-EOPNOTSUPP); 7329c8d9ebSAdit Ranadive } 7429c8d9ebSAdit Ranadive 7529c8d9ebSAdit Ranadive mr = kzalloc(sizeof(*mr), GFP_KERNEL); 7629c8d9ebSAdit Ranadive if (!mr) 7729c8d9ebSAdit Ranadive return ERR_PTR(-ENOMEM); 7829c8d9ebSAdit Ranadive 7929c8d9ebSAdit Ranadive memset(cmd, 0, sizeof(*cmd)); 8029c8d9ebSAdit Ranadive cmd->hdr.cmd = PVRDMA_CMD_CREATE_MR; 8129c8d9ebSAdit Ranadive cmd->pd_handle = to_vpd(pd)->pd_handle; 8229c8d9ebSAdit Ranadive cmd->access_flags = acc; 8329c8d9ebSAdit Ranadive cmd->flags = PVRDMA_MR_FLAG_DMA; 8429c8d9ebSAdit Ranadive 8529c8d9ebSAdit Ranadive ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_MR_RESP); 8629c8d9ebSAdit Ranadive if (ret < 0) { 8729c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 8829c8d9ebSAdit Ranadive "could not get DMA mem region, error: %d\n", ret); 8929c8d9ebSAdit Ranadive kfree(mr); 9029c8d9ebSAdit Ranadive return ERR_PTR(ret); 9129c8d9ebSAdit Ranadive } 9229c8d9ebSAdit Ranadive 9329c8d9ebSAdit Ranadive mr->mmr.mr_handle = resp->mr_handle; 9429c8d9ebSAdit Ranadive mr->ibmr.lkey = resp->lkey; 9529c8d9ebSAdit Ranadive mr->ibmr.rkey = resp->rkey; 9629c8d9ebSAdit Ranadive 9729c8d9ebSAdit Ranadive return &mr->ibmr; 9829c8d9ebSAdit Ranadive } 9929c8d9ebSAdit Ranadive 10029c8d9ebSAdit Ranadive /** 10129c8d9ebSAdit Ranadive * pvrdma_reg_user_mr - register a userspace memory region 10229c8d9ebSAdit Ranadive * @pd: protection domain 10329c8d9ebSAdit Ranadive * @start: starting address 10429c8d9ebSAdit Ranadive * @length: length of region 10529c8d9ebSAdit Ranadive * @virt_addr: I/O virtual address 10629c8d9ebSAdit Ranadive * @access_flags: access flags for memory region 10729c8d9ebSAdit Ranadive * @udata: user data 10829c8d9ebSAdit Ranadive * 10929c8d9ebSAdit Ranadive * @return: ib_mr pointer on success, otherwise returns an errno. 11029c8d9ebSAdit Ranadive */ 11129c8d9ebSAdit Ranadive struct ib_mr *pvrdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 11229c8d9ebSAdit Ranadive u64 virt_addr, int access_flags, 11329c8d9ebSAdit Ranadive struct ib_udata *udata) 11429c8d9ebSAdit Ranadive { 11529c8d9ebSAdit Ranadive struct pvrdma_dev *dev = to_vdev(pd->device); 11629c8d9ebSAdit Ranadive struct pvrdma_user_mr *mr = NULL; 11729c8d9ebSAdit Ranadive struct ib_umem *umem; 11829c8d9ebSAdit Ranadive union pvrdma_cmd_req req; 11929c8d9ebSAdit Ranadive union pvrdma_cmd_resp rsp; 12029c8d9ebSAdit Ranadive struct pvrdma_cmd_create_mr *cmd = &req.create_mr; 12129c8d9ebSAdit Ranadive struct pvrdma_cmd_create_mr_resp *resp = &rsp.create_mr_resp; 122d10bcf94SShiraz Saleem int ret, npages; 12329c8d9ebSAdit Ranadive 12429c8d9ebSAdit Ranadive if (length == 0 || length > dev->dsr->caps.max_mr_size) { 12529c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, "invalid mem region length\n"); 12629c8d9ebSAdit Ranadive return ERR_PTR(-EINVAL); 12729c8d9ebSAdit Ranadive } 12829c8d9ebSAdit Ranadive 129b0ea0fa5SJason Gunthorpe umem = ib_umem_get(udata, start, length, access_flags, 0); 13029c8d9ebSAdit Ranadive if (IS_ERR(umem)) { 13129c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 13229c8d9ebSAdit Ranadive "could not get umem for mem region\n"); 13329c8d9ebSAdit Ranadive return ERR_CAST(umem); 13429c8d9ebSAdit Ranadive } 13529c8d9ebSAdit Ranadive 136d10bcf94SShiraz Saleem npages = ib_umem_num_pages(umem); 137d10bcf94SShiraz Saleem if (npages < 0 || npages > PVRDMA_PAGE_DIR_MAX_PAGES) { 13829c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, "overflow %d pages in mem region\n", 139d10bcf94SShiraz Saleem npages); 14029c8d9ebSAdit Ranadive ret = -EINVAL; 14129c8d9ebSAdit Ranadive goto err_umem; 14229c8d9ebSAdit Ranadive } 14329c8d9ebSAdit Ranadive 14429c8d9ebSAdit Ranadive mr = kzalloc(sizeof(*mr), GFP_KERNEL); 14529c8d9ebSAdit Ranadive if (!mr) { 14629c8d9ebSAdit Ranadive ret = -ENOMEM; 14729c8d9ebSAdit Ranadive goto err_umem; 14829c8d9ebSAdit Ranadive } 14929c8d9ebSAdit Ranadive 15029c8d9ebSAdit Ranadive mr->mmr.iova = virt_addr; 15129c8d9ebSAdit Ranadive mr->mmr.size = length; 15229c8d9ebSAdit Ranadive mr->umem = umem; 15329c8d9ebSAdit Ranadive 154d10bcf94SShiraz Saleem ret = pvrdma_page_dir_init(dev, &mr->pdir, npages, false); 15529c8d9ebSAdit Ranadive if (ret) { 15629c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 15729c8d9ebSAdit Ranadive "could not allocate page directory\n"); 15829c8d9ebSAdit Ranadive goto err_umem; 15929c8d9ebSAdit Ranadive } 16029c8d9ebSAdit Ranadive 16129c8d9ebSAdit Ranadive ret = pvrdma_page_dir_insert_umem(&mr->pdir, mr->umem, 0); 16229c8d9ebSAdit Ranadive if (ret) 16329c8d9ebSAdit Ranadive goto err_pdir; 16429c8d9ebSAdit Ranadive 16529c8d9ebSAdit Ranadive memset(cmd, 0, sizeof(*cmd)); 16629c8d9ebSAdit Ranadive cmd->hdr.cmd = PVRDMA_CMD_CREATE_MR; 16729c8d9ebSAdit Ranadive cmd->start = start; 16829c8d9ebSAdit Ranadive cmd->length = length; 16929c8d9ebSAdit Ranadive cmd->pd_handle = to_vpd(pd)->pd_handle; 17029c8d9ebSAdit Ranadive cmd->access_flags = access_flags; 171d10bcf94SShiraz Saleem cmd->nchunks = npages; 17229c8d9ebSAdit Ranadive cmd->pdir_dma = mr->pdir.dir_dma; 17329c8d9ebSAdit Ranadive 17429c8d9ebSAdit Ranadive ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_MR_RESP); 17529c8d9ebSAdit Ranadive if (ret < 0) { 17629c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 17729c8d9ebSAdit Ranadive "could not register mem region, error: %d\n", ret); 17829c8d9ebSAdit Ranadive goto err_pdir; 17929c8d9ebSAdit Ranadive } 18029c8d9ebSAdit Ranadive 18129c8d9ebSAdit Ranadive mr->mmr.mr_handle = resp->mr_handle; 18229c8d9ebSAdit Ranadive mr->ibmr.lkey = resp->lkey; 18329c8d9ebSAdit Ranadive mr->ibmr.rkey = resp->rkey; 18429c8d9ebSAdit Ranadive 18529c8d9ebSAdit Ranadive return &mr->ibmr; 18629c8d9ebSAdit Ranadive 18729c8d9ebSAdit Ranadive err_pdir: 18829c8d9ebSAdit Ranadive pvrdma_page_dir_cleanup(dev, &mr->pdir); 18929c8d9ebSAdit Ranadive err_umem: 19029c8d9ebSAdit Ranadive ib_umem_release(umem); 19129c8d9ebSAdit Ranadive kfree(mr); 19229c8d9ebSAdit Ranadive 19329c8d9ebSAdit Ranadive return ERR_PTR(ret); 19429c8d9ebSAdit Ranadive } 19529c8d9ebSAdit Ranadive 19629c8d9ebSAdit Ranadive /** 19729c8d9ebSAdit Ranadive * pvrdma_alloc_mr - allocate a memory region 19829c8d9ebSAdit Ranadive * @pd: protection domain 19929c8d9ebSAdit Ranadive * @mr_type: type of memory region 20029c8d9ebSAdit Ranadive * @max_num_sg: maximum number of pages 20129c8d9ebSAdit Ranadive * 20229c8d9ebSAdit Ranadive * @return: ib_mr pointer on success, otherwise returns an errno. 20329c8d9ebSAdit Ranadive */ 20429c8d9ebSAdit Ranadive struct ib_mr *pvrdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, 205c4367a26SShamir Rabinovitch u32 max_num_sg, struct ib_udata *udata) 20629c8d9ebSAdit Ranadive { 20729c8d9ebSAdit Ranadive struct pvrdma_dev *dev = to_vdev(pd->device); 20829c8d9ebSAdit Ranadive struct pvrdma_user_mr *mr; 20929c8d9ebSAdit Ranadive union pvrdma_cmd_req req; 21029c8d9ebSAdit Ranadive union pvrdma_cmd_resp rsp; 21129c8d9ebSAdit Ranadive struct pvrdma_cmd_create_mr *cmd = &req.create_mr; 21229c8d9ebSAdit Ranadive struct pvrdma_cmd_create_mr_resp *resp = &rsp.create_mr_resp; 21329c8d9ebSAdit Ranadive int size = max_num_sg * sizeof(u64); 21429c8d9ebSAdit Ranadive int ret; 21529c8d9ebSAdit Ranadive 21629c8d9ebSAdit Ranadive if (mr_type != IB_MR_TYPE_MEM_REG || 21729c8d9ebSAdit Ranadive max_num_sg > PVRDMA_MAX_FAST_REG_PAGES) 21829c8d9ebSAdit Ranadive return ERR_PTR(-EINVAL); 21929c8d9ebSAdit Ranadive 22029c8d9ebSAdit Ranadive mr = kzalloc(sizeof(*mr), GFP_KERNEL); 22129c8d9ebSAdit Ranadive if (!mr) 22229c8d9ebSAdit Ranadive return ERR_PTR(-ENOMEM); 22329c8d9ebSAdit Ranadive 22429c8d9ebSAdit Ranadive mr->pages = kzalloc(size, GFP_KERNEL); 22529c8d9ebSAdit Ranadive if (!mr->pages) { 22629c8d9ebSAdit Ranadive ret = -ENOMEM; 22729c8d9ebSAdit Ranadive goto freemr; 22829c8d9ebSAdit Ranadive } 22929c8d9ebSAdit Ranadive 23029c8d9ebSAdit Ranadive ret = pvrdma_page_dir_init(dev, &mr->pdir, max_num_sg, false); 23129c8d9ebSAdit Ranadive if (ret) { 23229c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 23329c8d9ebSAdit Ranadive "failed to allocate page dir for mr\n"); 23429c8d9ebSAdit Ranadive ret = -ENOMEM; 23529c8d9ebSAdit Ranadive goto freepages; 23629c8d9ebSAdit Ranadive } 23729c8d9ebSAdit Ranadive 23829c8d9ebSAdit Ranadive memset(cmd, 0, sizeof(*cmd)); 23929c8d9ebSAdit Ranadive cmd->hdr.cmd = PVRDMA_CMD_CREATE_MR; 24029c8d9ebSAdit Ranadive cmd->pd_handle = to_vpd(pd)->pd_handle; 24129c8d9ebSAdit Ranadive cmd->access_flags = 0; 24229c8d9ebSAdit Ranadive cmd->flags = PVRDMA_MR_FLAG_FRMR; 24329c8d9ebSAdit Ranadive cmd->nchunks = max_num_sg; 24429c8d9ebSAdit Ranadive 24529c8d9ebSAdit Ranadive ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_MR_RESP); 24629c8d9ebSAdit Ranadive if (ret < 0) { 24729c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 24829c8d9ebSAdit Ranadive "could not create FR mem region, error: %d\n", ret); 24929c8d9ebSAdit Ranadive goto freepdir; 25029c8d9ebSAdit Ranadive } 25129c8d9ebSAdit Ranadive 25229c8d9ebSAdit Ranadive mr->max_pages = max_num_sg; 25329c8d9ebSAdit Ranadive mr->mmr.mr_handle = resp->mr_handle; 25429c8d9ebSAdit Ranadive mr->ibmr.lkey = resp->lkey; 25529c8d9ebSAdit Ranadive mr->ibmr.rkey = resp->rkey; 25629c8d9ebSAdit Ranadive mr->page_shift = PAGE_SHIFT; 25729c8d9ebSAdit Ranadive mr->umem = NULL; 25829c8d9ebSAdit Ranadive 25929c8d9ebSAdit Ranadive return &mr->ibmr; 26029c8d9ebSAdit Ranadive 26129c8d9ebSAdit Ranadive freepdir: 26229c8d9ebSAdit Ranadive pvrdma_page_dir_cleanup(dev, &mr->pdir); 26329c8d9ebSAdit Ranadive freepages: 26429c8d9ebSAdit Ranadive kfree(mr->pages); 26529c8d9ebSAdit Ranadive freemr: 26629c8d9ebSAdit Ranadive kfree(mr); 26729c8d9ebSAdit Ranadive return ERR_PTR(ret); 26829c8d9ebSAdit Ranadive } 26929c8d9ebSAdit Ranadive 27029c8d9ebSAdit Ranadive /** 27129c8d9ebSAdit Ranadive * pvrdma_dereg_mr - deregister a memory region 27229c8d9ebSAdit Ranadive * @ibmr: memory region 27329c8d9ebSAdit Ranadive * 27429c8d9ebSAdit Ranadive * @return: 0 on success. 27529c8d9ebSAdit Ranadive */ 276c4367a26SShamir Rabinovitch int pvrdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 27729c8d9ebSAdit Ranadive { 27829c8d9ebSAdit Ranadive struct pvrdma_user_mr *mr = to_vmr(ibmr); 27929c8d9ebSAdit Ranadive struct pvrdma_dev *dev = to_vdev(ibmr->device); 28029c8d9ebSAdit Ranadive union pvrdma_cmd_req req; 28129c8d9ebSAdit Ranadive struct pvrdma_cmd_destroy_mr *cmd = &req.destroy_mr; 28229c8d9ebSAdit Ranadive int ret; 28329c8d9ebSAdit Ranadive 28429c8d9ebSAdit Ranadive memset(cmd, 0, sizeof(*cmd)); 28529c8d9ebSAdit Ranadive cmd->hdr.cmd = PVRDMA_CMD_DESTROY_MR; 28629c8d9ebSAdit Ranadive cmd->mr_handle = mr->mmr.mr_handle; 28729c8d9ebSAdit Ranadive ret = pvrdma_cmd_post(dev, &req, NULL, 0); 28829c8d9ebSAdit Ranadive if (ret < 0) 28929c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, 29029c8d9ebSAdit Ranadive "could not deregister mem region, error: %d\n", ret); 29129c8d9ebSAdit Ranadive 29229c8d9ebSAdit Ranadive pvrdma_page_dir_cleanup(dev, &mr->pdir); 29329c8d9ebSAdit Ranadive if (mr->umem) 29429c8d9ebSAdit Ranadive ib_umem_release(mr->umem); 29529c8d9ebSAdit Ranadive 29629c8d9ebSAdit Ranadive kfree(mr->pages); 29729c8d9ebSAdit Ranadive kfree(mr); 29829c8d9ebSAdit Ranadive 29929c8d9ebSAdit Ranadive return 0; 30029c8d9ebSAdit Ranadive } 30129c8d9ebSAdit Ranadive 30229c8d9ebSAdit Ranadive static int pvrdma_set_page(struct ib_mr *ibmr, u64 addr) 30329c8d9ebSAdit Ranadive { 30429c8d9ebSAdit Ranadive struct pvrdma_user_mr *mr = to_vmr(ibmr); 30529c8d9ebSAdit Ranadive 30629c8d9ebSAdit Ranadive if (mr->npages == mr->max_pages) 30729c8d9ebSAdit Ranadive return -ENOMEM; 30829c8d9ebSAdit Ranadive 30929c8d9ebSAdit Ranadive mr->pages[mr->npages++] = addr; 31029c8d9ebSAdit Ranadive return 0; 31129c8d9ebSAdit Ranadive } 31229c8d9ebSAdit Ranadive 31329c8d9ebSAdit Ranadive int pvrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, 31429c8d9ebSAdit Ranadive unsigned int *sg_offset) 31529c8d9ebSAdit Ranadive { 31629c8d9ebSAdit Ranadive struct pvrdma_user_mr *mr = to_vmr(ibmr); 31729c8d9ebSAdit Ranadive struct pvrdma_dev *dev = to_vdev(ibmr->device); 31829c8d9ebSAdit Ranadive int ret; 31929c8d9ebSAdit Ranadive 32029c8d9ebSAdit Ranadive mr->npages = 0; 32129c8d9ebSAdit Ranadive 32229c8d9ebSAdit Ranadive ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, pvrdma_set_page); 32329c8d9ebSAdit Ranadive if (ret < 0) 32429c8d9ebSAdit Ranadive dev_warn(&dev->pdev->dev, "could not map sg to pages\n"); 32529c8d9ebSAdit Ranadive 32629c8d9ebSAdit Ranadive return ret; 32729c8d9ebSAdit Ranadive } 328