/* * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/slab.h> #include "mlx4_ib.h" static u32 convert_access(int acc) { return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) | (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) | (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) | (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) | MLX4_PERM_LOCAL_READ; } struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc) { struct mlx4_ib_mr *mr; int err; mr = kmalloc(sizeof *mr, GFP_KERNEL); if (!mr) return ERR_PTR(-ENOMEM); err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0, ~0ull, convert_access(acc), 0, 0, &mr->mmr); if (err) goto err_free; err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr); if (err) goto err_mr; mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; mr->umem = NULL; return &mr->ibmr; err_mr: mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); err_free: kfree(mr); return ERR_PTR(err); } int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, struct ib_umem *umem) { u64 *pages; struct ib_umem_chunk *chunk; int i, j, k; int n; int len; int err = 0; pages = (u64 *) __get_free_page(GFP_KERNEL); if (!pages) return -ENOMEM; i = n = 0; list_for_each_entry(chunk, &umem->chunk_list, list) for (j = 0; j < chunk->nmap; ++j) { len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; for (k = 0; k < len; ++k) { pages[i++] = sg_dma_address(&chunk->page_list[j]) + umem->page_size * k; /* * Be friendly to mlx4_write_mtt() and * pass it chunks of appropriate size. */ if (i == PAGE_SIZE / sizeof (u64)) { err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); if (err) goto out; n += i; i = 0; } } } if (i) err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); out: free_page((unsigned long) pages); return err; } struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt_addr, int access_flags, struct ib_udata *udata) { struct mlx4_ib_dev *dev = to_mdev(pd->device); struct mlx4_ib_mr *mr; int shift; int err; int n; mr = kmalloc(sizeof *mr, GFP_KERNEL); if (!mr) return ERR_PTR(-ENOMEM); mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags, 0); if (IS_ERR(mr->umem)) { err = PTR_ERR(mr->umem); goto err_free; } n = ib_umem_page_count(mr->umem); shift = ilog2(mr->umem->page_size); err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length, convert_access(access_flags), n, shift, &mr->mmr); if (err) goto err_umem; err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem); if (err) goto err_mr; err = mlx4_mr_enable(dev->dev, &mr->mmr); if (err) goto err_mr; mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; return &mr->ibmr; err_mr: mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); err_umem: ib_umem_release(mr->umem); err_free: kfree(mr); return ERR_PTR(err); } int mlx4_ib_dereg_mr(struct ib_mr *ibmr) { struct mlx4_ib_mr *mr = to_mmr(ibmr); mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr); if (mr->umem) ib_umem_release(mr->umem); kfree(mr); return 0; } struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len) { struct mlx4_ib_dev *dev = to_mdev(pd->device); struct mlx4_ib_mr *mr; int err; mr = kmalloc(sizeof *mr, GFP_KERNEL); if (!mr) return ERR_PTR(-ENOMEM); err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0, max_page_list_len, 0, &mr->mmr); if (err) goto err_free; err = mlx4_mr_enable(dev->dev, &mr->mmr); if (err) goto err_mr; mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; mr->umem = NULL; return &mr->ibmr; err_mr: mlx4_mr_free(dev->dev, &mr->mmr); err_free: kfree(mr); return ERR_PTR(err); } struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev, int page_list_len) { struct mlx4_ib_dev *dev = to_mdev(ibdev); struct mlx4_ib_fast_reg_page_list *mfrpl; int size = page_list_len * sizeof (u64); if (page_list_len > MLX4_MAX_FAST_REG_PAGES) return ERR_PTR(-EINVAL); mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL); if (!mfrpl) return ERR_PTR(-ENOMEM); mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL); if (!mfrpl->ibfrpl.page_list) goto err_free; mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev, size, &mfrpl->map, GFP_KERNEL); if (!mfrpl->mapped_page_list) goto err_free; WARN_ON(mfrpl->map & 0x3f); return &mfrpl->ibfrpl; err_free: kfree(mfrpl->ibfrpl.page_list); kfree(mfrpl); return ERR_PTR(-ENOMEM); } void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) { struct mlx4_ib_dev *dev = to_mdev(page_list->device); struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list); int size = page_list->max_page_list_len * sizeof (u64); dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list, mfrpl->map); kfree(mfrpl->ibfrpl.page_list); kfree(mfrpl); } struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc, struct ib_fmr_attr *fmr_attr) { struct mlx4_ib_dev *dev = to_mdev(pd->device); struct mlx4_ib_fmr *fmr; int err = -ENOMEM; fmr = kmalloc(sizeof *fmr, GFP_KERNEL); if (!fmr) return ERR_PTR(-ENOMEM); err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc), fmr_attr->max_pages, fmr_attr->max_maps, fmr_attr->page_shift, &fmr->mfmr); if (err) goto err_free; err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr); if (err) goto err_mr; fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key; return &fmr->ibfmr; err_mr: mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr); err_free: kfree(fmr); return ERR_PTR(err); } int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, int npages, u64 iova) { struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device); return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); } int mlx4_ib_unmap_fmr(struct list_head *fmr_list) { struct ib_fmr *ibfmr; int err; struct mlx4_dev *mdev = NULL; list_for_each_entry(ibfmr, fmr_list, list) { if (mdev && to_mdev(ibfmr->device)->dev != mdev) return -EINVAL; mdev = to_mdev(ibfmr->device)->dev; } if (!mdev) return 0; list_for_each_entry(ibfmr, fmr_list, list) { struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); } /* * Make sure all MPT status updates are visible before issuing * SYNC_TPT firmware command. */ wmb(); err = mlx4_SYNC_TPT(mdev); if (err) printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when " "unmapping FMRs\n", err); return 0; } int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr) { struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); struct mlx4_ib_dev *dev = to_mdev(ibfmr->device); int err; err = mlx4_fmr_free(dev->dev, &ifmr->mfmr); if (!err) kfree(ifmr); return err; }