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

   1/*
   2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
   3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenIB.org BSD license below:
  10 *
  11 *     Redistribution and use in source and binary forms, with or
  12 *     without modification, are permitted provided that the following
  13 *     conditions are met:
  14 *
  15 *      - Redistributions of source code must retain the above
  16 *        copyright notice, this list of conditions and the following
  17 *        disclaimer.
  18 *
  19 *      - Redistributions in binary form must reproduce the above
  20 *        copyright notice, this list of conditions and the following
  21 *        disclaimer in the documentation and/or other materials
  22 *        provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 */
  33
  34#include "mlx4_ib.h"
  35
  36static u32 convert_access(int acc)
  37{
  38        return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC       : 0) |
  39               (acc & IB_ACCESS_REMOTE_WRITE  ? MLX4_PERM_REMOTE_WRITE : 0) |
  40               (acc & IB_ACCESS_REMOTE_READ   ? MLX4_PERM_REMOTE_READ  : 0) |
  41               (acc & IB_ACCESS_LOCAL_WRITE   ? MLX4_PERM_LOCAL_WRITE  : 0) |
  42               MLX4_PERM_LOCAL_READ;
  43}
  44
  45struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
  46{
  47        struct mlx4_ib_mr *mr;
  48        int err;
  49
  50        mr = kmalloc(sizeof *mr, GFP_KERNEL);
  51        if (!mr)
  52                return ERR_PTR(-ENOMEM);
  53
  54        err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
  55                            ~0ull, convert_access(acc), 0, 0, &mr->mmr);
  56        if (err)
  57                goto err_free;
  58
  59        err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
  60        if (err)
  61                goto err_mr;
  62
  63        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
  64        mr->umem = NULL;
  65
  66        return &mr->ibmr;
  67
  68err_mr:
  69        mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
  70
  71err_free:
  72        kfree(mr);
  73
  74        return ERR_PTR(err);
  75}
  76
  77int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
  78                           struct ib_umem *umem)
  79{
  80        u64 *pages;
  81        struct ib_umem_chunk *chunk;
  82        int i, j, k;
  83        int n;
  84        int len;
  85        int err = 0;
  86
  87        pages = (u64 *) __get_free_page(GFP_KERNEL);
  88        if (!pages)
  89                return -ENOMEM;
  90
  91        i = n = 0;
  92
  93        list_for_each_entry(chunk, &umem->chunk_list, list)
  94                for (j = 0; j < chunk->nmap; ++j) {
  95                        len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
  96                        for (k = 0; k < len; ++k) {
  97                                pages[i++] = sg_dma_address(&chunk->page_list[j]) +
  98                                        umem->page_size * k;
  99                                /*
 100                                 * Be friendly to mlx4_write_mtt() and
 101                                 * pass it chunks of appropriate size.
 102                                 */
 103                                if (i == PAGE_SIZE / sizeof (u64)) {
 104                                        err = mlx4_write_mtt(dev->dev, mtt, n,
 105                                                             i, pages);
 106                                        if (err)
 107                                                goto out;
 108                                        n += i;
 109                                        i = 0;
 110                                }
 111                        }
 112                }
 113
 114        if (i)
 115                err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
 116
 117out:
 118        free_page((unsigned long) pages);
 119        return err;
 120}
 121
 122struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 123                                  u64 virt_addr, int access_flags,
 124                                  struct ib_udata *udata)
 125{
 126        struct mlx4_ib_dev *dev = to_mdev(pd->device);
 127        struct mlx4_ib_mr *mr;
 128        int shift;
 129        int err;
 130        int n;
 131
 132        mr = kmalloc(sizeof *mr, GFP_KERNEL);
 133        if (!mr)
 134                return ERR_PTR(-ENOMEM);
 135
 136        mr->umem = ib_umem_get(pd->uobject->context, start, length,
 137                               access_flags, 0);
 138        if (IS_ERR(mr->umem)) {
 139                err = PTR_ERR(mr->umem);
 140                goto err_free;
 141        }
 142
 143        n = ib_umem_page_count(mr->umem);
 144        shift = ilog2(mr->umem->page_size);
 145
 146        err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
 147                            convert_access(access_flags), n, shift, &mr->mmr);
 148        if (err)
 149                goto err_umem;
 150
 151        err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
 152        if (err)
 153                goto err_mr;
 154
 155        err = mlx4_mr_enable(dev->dev, &mr->mmr);
 156        if (err)
 157                goto err_mr;
 158
 159        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 160
 161        return &mr->ibmr;
 162
 163err_mr:
 164        mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
 165
 166err_umem:
 167        ib_umem_release(mr->umem);
 168
 169err_free:
 170        kfree(mr);
 171
 172        return ERR_PTR(err);
 173}
 174
 175int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
 176{
 177        struct mlx4_ib_mr *mr = to_mmr(ibmr);
 178
 179        mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
 180        if (mr->umem)
 181                ib_umem_release(mr->umem);
 182        kfree(mr);
 183
 184        return 0;
 185}
 186
 187struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
 188                                        int max_page_list_len)
 189{
 190        struct mlx4_ib_dev *dev = to_mdev(pd->device);
 191        struct mlx4_ib_mr *mr;
 192        int err;
 193
 194        mr = kmalloc(sizeof *mr, GFP_KERNEL);
 195        if (!mr)
 196                return ERR_PTR(-ENOMEM);
 197
 198        err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
 199                            max_page_list_len, 0, &mr->mmr);
 200        if (err)
 201                goto err_free;
 202
 203        err = mlx4_mr_enable(dev->dev, &mr->mmr);
 204        if (err)
 205                goto err_mr;
 206
 207        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 208
 209        return &mr->ibmr;
 210
 211err_mr:
 212        mlx4_mr_free(dev->dev, &mr->mmr);
 213
 214err_free:
 215        kfree(mr);
 216        return ERR_PTR(err);
 217}
 218
 219struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
 220                                                               int page_list_len)
 221{
 222        struct mlx4_ib_dev *dev = to_mdev(ibdev);
 223        struct mlx4_ib_fast_reg_page_list *mfrpl;
 224        int size = page_list_len * sizeof (u64);
 225
 226        if (size > PAGE_SIZE)
 227                return ERR_PTR(-EINVAL);
 228
 229        mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
 230        if (!mfrpl)
 231                return ERR_PTR(-ENOMEM);
 232
 233        mfrpl->ibfrpl.page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
 234                                                     size, &mfrpl->map,
 235                                                     GFP_KERNEL);
 236        if (!mfrpl->ibfrpl.page_list)
 237                goto err_free;
 238
 239        WARN_ON(mfrpl->map & 0x3f);
 240
 241        return &mfrpl->ibfrpl;
 242
 243err_free:
 244        kfree(mfrpl);
 245        return ERR_PTR(-ENOMEM);
 246}
 247
 248void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
 249{
 250        struct mlx4_ib_dev *dev = to_mdev(page_list->device);
 251        struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
 252        int size = page_list->max_page_list_len * sizeof (u64);
 253
 254        dma_free_coherent(&dev->dev->pdev->dev, size, page_list->page_list,
 255                          mfrpl->map);
 256        kfree(mfrpl);
 257}
 258
 259struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
 260                                 struct ib_fmr_attr *fmr_attr)
 261{
 262        struct mlx4_ib_dev *dev = to_mdev(pd->device);
 263        struct mlx4_ib_fmr *fmr;
 264        int err = -ENOMEM;
 265
 266        fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 267        if (!fmr)
 268                return ERR_PTR(-ENOMEM);
 269
 270        err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
 271                             fmr_attr->max_pages, fmr_attr->max_maps,
 272                             fmr_attr->page_shift, &fmr->mfmr);
 273        if (err)
 274                goto err_free;
 275
 276        err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
 277        if (err)
 278                goto err_mr;
 279
 280        fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
 281
 282        return &fmr->ibfmr;
 283
 284err_mr:
 285        mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 286
 287err_free:
 288        kfree(fmr);
 289
 290        return ERR_PTR(err);
 291}
 292
 293int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 294                      int npages, u64 iova)
 295{
 296        struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 297        struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
 298
 299        return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
 300                                 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 301}
 302
 303int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
 304{
 305        struct ib_fmr *ibfmr;
 306        int err;
 307        struct mlx4_dev *mdev = NULL;
 308
 309        list_for_each_entry(ibfmr, fmr_list, list) {
 310                if (mdev && to_mdev(ibfmr->device)->dev != mdev)
 311                        return -EINVAL;
 312                mdev = to_mdev(ibfmr->device)->dev;
 313        }
 314
 315        if (!mdev)
 316                return 0;
 317
 318        list_for_each_entry(ibfmr, fmr_list, list) {
 319                struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 320
 321                mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 322        }
 323
 324        /*
 325         * Make sure all MPT status updates are visible before issuing
 326         * SYNC_TPT firmware command.
 327         */
 328        wmb();
 329
 330        err = mlx4_SYNC_TPT(mdev);
 331        if (err)
 332                printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
 333                       "unmapping FMRs\n", err);
 334
 335        return 0;
 336}
 337
 338int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
 339{
 340        struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 341        struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
 342        int err;
 343
 344        err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
 345
 346        if (!err)
 347                kfree(ifmr);
 348
 349        return err;
 350}
 351