LXR linux/drivers/infiniband/hw/mlx4/mr.c

   1/*
   2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32
  33#include "mlx4_ib.h"
  34
  35static u32 convert_access(int acc)
  36{
  37        return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC       : 0) |
  38               (acc & IB_ACCESS_REMOTE_WRITE  ? MLX4_PERM_REMOTE_WRITE : 0) |
  39               (acc & IB_ACCESS_REMOTE_READ   ? MLX4_PERM_REMOTE_READ  : 0) |
  40               (acc & IB_ACCESS_LOCAL_WRITE   ? MLX4_PERM_LOCAL_WRITE  : 0) |
  41               MLX4_PERM_LOCAL_READ;
  42}
  43
  44struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
  45{
  46        struct mlx4_ib_mr *mr;
  47        int err;
  48
  49        mr = kmalloc(sizeof *mr, GFP_KERNEL);
  50        if (!mr)
  51                return ERR_PTR(-ENOMEM);
  52
  53        err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
  54                            ~0ull, convert_access(acc), 0, 0, &mr->mmr);
  55        if (err)
  56                goto err_free;
  57
  58        err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
  59        if (err)
  60                goto err_mr;
  61
  62        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
  63        mr->umem = NULL;
  64
  65        return &mr->ibmr;
  66
  67err_mr:
  68        mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
  69
  70err_free:
  71        kfree(mr);
  72
  73        return ERR_PTR(err);
  74}
  75
  76int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
  77                           struct ib_umem *umem)
  78{
  79        u64 *pages;
  80        struct ib_umem_chunk *chunk;
  81        int i, j, k;
  82        int n;
  83        int len;
  84        int err = 0;
  85
  86        pages = (u64 *) __get_free_page(GFP_KERNEL);
  87        if (!pages)
  88                return -ENOMEM;
  89
  90        i = n = 0;
  91
  92        list_for_each_entry(chunk, &umem->chunk_list, list)
  93                for (j = 0; j < chunk->nmap; ++j) {
  94                        len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
  95                        for (k = 0; k < len; ++k) {
  96                                pages[i++] = sg_dma_address(&chunk->page_list[j]) +
  97                                        umem->page_size * k;
  98                                /*
  99                                 * Be friendly to mlx4_write_mtt() and
 100                                 * pass it chunks of appropriate size.
 101                                 */
 102                                if (i == PAGE_SIZE / sizeof (u64)) {
 103                                        err = mlx4_write_mtt(dev->dev, mtt, n,
 104                                                             i, pages);
 105                                        if (err)
 106                                                goto out;
 107                                        n += i;
 108                                        i = 0;
 109                                }
 110                        }
 111                }
 112
 113        if (i)
 114                err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
 115
 116out:
 117        free_page((unsigned long) pages);
 118        return err;
 119}
 120
 121struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 122                                  u64 virt_addr, int access_flags,
 123                                  struct ib_udata *udata)
 124{
 125        struct mlx4_ib_dev *dev = to_mdev(pd->device);
 126        struct mlx4_ib_mr *mr;
 127        int shift;
 128        int err;
 129        int n;
 130
 131        mr = kmalloc(sizeof *mr, GFP_KERNEL);
 132        if (!mr)
 133                return ERR_PTR(-ENOMEM);
 134
 135        mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags);
 136        if (IS_ERR(mr->umem)) {
 137                err = PTR_ERR(mr->umem);
 138                goto err_free;
 139        }
 140
 141        n = ib_umem_page_count(mr->umem);
 142        shift = ilog2(mr->umem->page_size);
 143
 144        err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
 145                            convert_access(access_flags), n, shift, &mr->mmr);
 146        if (err)
 147                goto err_umem;
 148
 149        err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
 150        if (err)
 151                goto err_mr;
 152
 153        err = mlx4_mr_enable(dev->dev, &mr->mmr);
 154        if (err)
 155                goto err_mr;
 156
 157        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 158
 159        return &mr->ibmr;
 160
 161err_mr:
 162        mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
 163
 164err_umem:
 165        ib_umem_release(mr->umem);
 166
 167err_free:
 168        kfree(mr);
 169
 170        return ERR_PTR(err);
 171}
 172
 173int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
 174{
 175        struct mlx4_ib_mr *mr = to_mmr(ibmr);
 176
 177        mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
 178        if (mr->umem)
 179                ib_umem_release(mr->umem);
 180        kfree(mr);
 181
 182        return 0;
 183}
 184
 185struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
 186                                 struct ib_fmr_attr *fmr_attr)
 187{
 188        struct mlx4_ib_dev *dev = to_mdev(pd->device);
 189        struct mlx4_ib_fmr *fmr;
 190        int err = -ENOMEM;
 191
 192        fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 193        if (!fmr)
 194                return ERR_PTR(-ENOMEM);
 195
 196        err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
 197                             fmr_attr->max_pages, fmr_attr->max_maps,
 198                             fmr_attr->page_shift, &fmr->mfmr);
 199        if (err)
 200                goto err_free;
 201
 202        err = mlx4_mr_enable(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 203        if (err)
 204                goto err_mr;
 205
 206        fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
 207
 208        return &fmr->ibfmr;
 209
 210err_mr:
 211        mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 212
 213err_free:
 214        kfree(fmr);
 215
 216        return ERR_PTR(err);
 217}
 218
 219int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 220                      int npages, u64 iova)
 221{
 222        struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 223        struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
 224
 225        return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
 226                                 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 227}
 228
 229int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
 230{
 231        struct ib_fmr *ibfmr;
 232        int err;
 233        struct mlx4_dev *mdev = NULL;
 234
 235        list_for_each_entry(ibfmr, fmr_list, list) {
 236                if (mdev && to_mdev(ibfmr->device)->dev != mdev)
 237                        return -EINVAL;
 238                mdev = to_mdev(ibfmr->device)->dev;
 239        }
 240
 241        if (!mdev)
 242                return 0;
 243
 244        list_for_each_entry(ibfmr, fmr_list, list) {
 245                struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 246
 247                mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 248        }
 249
 250        /*
 251         * Make sure all MPT status updates are visible before issuing
 252         * SYNC_TPT firmware command.
 253         */
 254        wmb();
 255
 256        err = mlx4_SYNC_TPT(mdev);
 257        if (err)
 258                printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
 259                       "unmapping FMRs\n", err);
 260
 261        return 0;
 262}
 263
 264int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
 265{
 266        struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 267        struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
 268        int err;
 269
 270        err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
 271
 272        if (!err)
 273                kfree(ifmr);
 274
 275        return err;
 276}
 277