8ad11fb6b0
Implement FMRs for mlx4. This is an adaptation of code from mthca. Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
277 lines
6.5 KiB
C
277 lines
6.5 KiB
C
/*
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* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "mlx4_ib.h"
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static u32 convert_access(int acc)
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{
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return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) |
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(acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) |
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(acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) |
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(acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) |
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MLX4_PERM_LOCAL_READ;
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}
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struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
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{
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struct mlx4_ib_mr *mr;
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int err;
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mr = kmalloc(sizeof *mr, GFP_KERNEL);
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if (!mr)
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return ERR_PTR(-ENOMEM);
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err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
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~0ull, convert_access(acc), 0, 0, &mr->mmr);
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if (err)
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goto err_free;
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err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
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if (err)
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goto err_mr;
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mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
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mr->umem = NULL;
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return &mr->ibmr;
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err_mr:
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mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
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err_free:
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kfree(mr);
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return ERR_PTR(err);
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}
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int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
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struct ib_umem *umem)
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{
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u64 *pages;
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struct ib_umem_chunk *chunk;
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int i, j, k;
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int n;
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int len;
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int err = 0;
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pages = (u64 *) __get_free_page(GFP_KERNEL);
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if (!pages)
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return -ENOMEM;
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i = n = 0;
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list_for_each_entry(chunk, &umem->chunk_list, list)
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for (j = 0; j < chunk->nmap; ++j) {
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len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
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for (k = 0; k < len; ++k) {
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pages[i++] = sg_dma_address(&chunk->page_list[j]) +
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umem->page_size * k;
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/*
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* Be friendly to mlx4_write_mtt() and
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* pass it chunks of appropriate size.
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*/
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if (i == PAGE_SIZE / sizeof (u64)) {
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err = mlx4_write_mtt(dev->dev, mtt, n,
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i, pages);
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if (err)
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goto out;
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n += i;
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i = 0;
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}
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}
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}
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if (i)
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err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
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out:
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free_page((unsigned long) pages);
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return err;
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}
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struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
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u64 virt_addr, int access_flags,
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struct ib_udata *udata)
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{
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struct mlx4_ib_dev *dev = to_mdev(pd->device);
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struct mlx4_ib_mr *mr;
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int shift;
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int err;
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int n;
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mr = kmalloc(sizeof *mr, GFP_KERNEL);
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if (!mr)
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return ERR_PTR(-ENOMEM);
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mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags);
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if (IS_ERR(mr->umem)) {
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err = PTR_ERR(mr->umem);
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goto err_free;
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}
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n = ib_umem_page_count(mr->umem);
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shift = ilog2(mr->umem->page_size);
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err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
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convert_access(access_flags), n, shift, &mr->mmr);
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if (err)
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goto err_umem;
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err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
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if (err)
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goto err_mr;
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err = mlx4_mr_enable(dev->dev, &mr->mmr);
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if (err)
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goto err_mr;
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mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
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return &mr->ibmr;
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err_mr:
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mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
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err_umem:
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ib_umem_release(mr->umem);
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err_free:
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kfree(mr);
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return ERR_PTR(err);
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}
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int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
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{
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struct mlx4_ib_mr *mr = to_mmr(ibmr);
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mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
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if (mr->umem)
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ib_umem_release(mr->umem);
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kfree(mr);
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return 0;
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}
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struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
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struct ib_fmr_attr *fmr_attr)
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{
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struct mlx4_ib_dev *dev = to_mdev(pd->device);
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struct mlx4_ib_fmr *fmr;
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int err = -ENOMEM;
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fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
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if (!fmr)
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return ERR_PTR(-ENOMEM);
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err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
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fmr_attr->max_pages, fmr_attr->max_maps,
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fmr_attr->page_shift, &fmr->mfmr);
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if (err)
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goto err_free;
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err = mlx4_mr_enable(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
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if (err)
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goto err_mr;
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fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
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return &fmr->ibfmr;
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err_mr:
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mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
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err_free:
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kfree(fmr);
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return ERR_PTR(err);
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}
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int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
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int npages, u64 iova)
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{
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struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
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struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
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return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
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&ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
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}
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int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
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{
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struct ib_fmr *ibfmr;
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int err;
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struct mlx4_dev *mdev = NULL;
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list_for_each_entry(ibfmr, fmr_list, list) {
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if (mdev && to_mdev(ibfmr->device)->dev != mdev)
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return -EINVAL;
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mdev = to_mdev(ibfmr->device)->dev;
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}
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if (!mdev)
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return 0;
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list_for_each_entry(ibfmr, fmr_list, list) {
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struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
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mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
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}
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/*
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* Make sure all MPT status updates are visible before issuing
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* SYNC_TPT firmware command.
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*/
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wmb();
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err = mlx4_SYNC_TPT(mdev);
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if (err)
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printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
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"unmapping FMRs\n", err);
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return 0;
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}
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int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
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{
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struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
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struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
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int err;
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err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
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if (!err)
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kfree(ifmr);
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return err;
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}
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