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 <linux/slab.h>
  35
  36 #include "mlx4_ib.h"
  37
  38 static u32 convert_access(int acc)
  39 {
  40         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC       : 0) |
  41                (acc & IB_ACCESS_REMOTE_WRITE  ? MLX4_PERM_REMOTE_WRITE : 0) |
  42                (acc & IB_ACCESS_REMOTE_READ   ? MLX4_PERM_REMOTE_READ  : 0) |
  43                (acc & IB_ACCESS_LOCAL_WRITE   ? MLX4_PERM_LOCAL_WRITE  : 0) |
  44                (acc & IB_ACCESS_MW_BIND       ? MLX4_PERM_BIND_MW      : 0) |
  45                MLX4_PERM_LOCAL_READ;
  46 }
  47
  48 static enum mlx4_mw_type to_mlx4_type(enum ib_mw_type type)
  49 {
  50         switch (type) {
  51         case IB_MW_TYPE_1:      return MLX4_MW_TYPE_1;
  52         case IB_MW_TYPE_2:      return MLX4_MW_TYPE_2;
  53         default:                return -1;
  54         }
  55 }
  56
  57 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
  58 {
  59         struct mlx4_ib_mr *mr;
  60         int err;
  61
  62         mr = kmalloc(sizeof *mr, GFP_KERNEL);
  63         if (!mr)
  64                 return ERR_PTR(-ENOMEM);
  65
  66         err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
  67                             ~0ull, convert_access(acc), 0, 0, &mr->mmr);
  68         if (err)
  69                 goto err_free;
  70
  71         err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
  72         if (err)
  73                 goto err_mr;
  74
  75         mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
  76         mr->umem = NULL;
  77
  78         return &mr->ibmr;
  79
  80 err_mr:
  81         (void) mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
  82
  83 err_free:
  84         kfree(mr);
  85
  86         return ERR_PTR(err);
  87 }
  88
  89 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
  90                            struct ib_umem *umem)
  91 {
  92         u64 *pages;
  93         struct ib_umem_chunk *chunk;
  94         int i, j, k;
  95         int n;
  96         int len;
  97         int err = 0;
  98
  99         pages = (u64 *) __get_free_page(GFP_KERNEL);
 100         if (!pages)
 101                 return -ENOMEM;
 102
 103         i = n = 0;
 104
 105         list_for_each_entry(chunk, &umem->chunk_list, list)
 106                 for (j = 0; j < chunk->nmap; ++j) {
 107                         len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
 108                         for (k = 0; k < len; ++k) {
 109                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
 110                                         umem->page_size * k;
 111                                 /*
 112                                  * Be friendly to mlx4_write_mtt() and
 113                                  * pass it chunks of appropriate size.
 114                                  */
 115                                 if (i == PAGE_SIZE / sizeof (u64)) {
 116                                         err = mlx4_write_mtt(dev->dev, mtt, n,
 117                                                              i, pages);
 118                                         if (err)
 119                                                 goto out;
 120                                         n += i;
 121                                         i = 0;
 122                                 }
 123                         }
 124                 }
 125
 126         if (i)
 127                 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
 128
 129 out:
 130         free_page((unsigned long) pages);
 131         return err;
 132 }
 133
 134 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 135                                   u64 virt_addr, int access_flags,
 136                                   struct ib_udata *udata)
 137 {
 138         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 139         struct mlx4_ib_mr *mr;
 140         int shift;
 141         int err;
 142         int n;
 143
 144         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 145         if (!mr)
 146                 return ERR_PTR(-ENOMEM);
 147
 148         mr->umem = ib_umem_get(pd->uobject->context, start, length,
 149                                access_flags, 0);
 150         if (IS_ERR(mr->umem)) {
 151                 err = PTR_ERR(mr->umem);
 152                 goto err_free;
 153         }
 154
 155         n = ib_umem_page_count(mr->umem);
 156         shift = ilog2(mr->umem->page_size);
 157
 158         err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
 159                             convert_access(access_flags), n, shift, &mr->mmr);
 160         if (err)
 161                 goto err_umem;
 162
 163         err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
 164         if (err)
 165                 goto err_mr;
 166
 167         err = mlx4_mr_enable(dev->dev, &mr->mmr);
 168         if (err)
 169                 goto err_mr;
 170
 171         mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 172
 173         return &mr->ibmr;
 174
 175 err_mr:
 176         (void) mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
 177
 178 err_umem:
 179         ib_umem_release(mr->umem);
 180
 181 err_free:
 182         kfree(mr);
 183
 184         return ERR_PTR(err);
 185 }
 186
 187 int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
 188 {
 189         struct mlx4_ib_mr *mr = to_mmr(ibmr);
 190         int ret;
 191
 192         ret = mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
 193         if (ret)
 194                 return ret;
 195         if (mr->umem)
 196                 ib_umem_release(mr->umem);
 197         kfree(mr);
 198
 199         return 0;
 200 }
 201
 202 struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
 203 {
 204         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 205         struct mlx4_ib_mw *mw;
 206         int err;
 207
 208         mw = kmalloc(sizeof(*mw), GFP_KERNEL);
 209         if (!mw)
 210                 return ERR_PTR(-ENOMEM);
 211
 212         err = mlx4_mw_alloc(dev->dev, to_mpd(pd)->pdn,
 213                             to_mlx4_type(type), &mw->mmw);
 214         if (err)
 215                 goto err_free;
 216
 217         err = mlx4_mw_enable(dev->dev, &mw->mmw);
 218         if (err)
 219                 goto err_mw;
 220
 221         mw->ibmw.rkey = mw->mmw.key;
 222
 223         return &mw->ibmw;
 224
 225 err_mw:
 226         mlx4_mw_free(dev->dev, &mw->mmw);
 227
 228 err_free:
 229         kfree(mw);
 230
 231         return ERR_PTR(err);
 232 }
 233
 234 int mlx4_ib_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
 235                     struct ib_mw_bind *mw_bind)
 236 {
 237         struct ib_send_wr  wr;
 238         struct ib_send_wr *bad_wr;
 239         int ret;
 240
 241         memset(&wr, 0, sizeof(wr));
 242         wr.opcode               = IB_WR_BIND_MW;
 243         wr.wr_id                = mw_bind->wr_id;
 244         wr.send_flags           = mw_bind->send_flags;
 245         wr.wr.bind_mw.mw        = mw;
 246         wr.wr.bind_mw.bind_info = mw_bind->bind_info;
 247         wr.wr.bind_mw.rkey      = ib_inc_rkey(mw->rkey);
 248
 249         ret = mlx4_ib_post_send(qp, &wr, &bad_wr);
 250         if (!ret)
 251                 mw->rkey = wr.wr.bind_mw.rkey;
 252
 253         return ret;
 254 }
 255
 256 int mlx4_ib_dealloc_mw(struct ib_mw *ibmw)
 257 {
 258         struct mlx4_ib_mw *mw = to_mmw(ibmw);
 259
 260         mlx4_mw_free(to_mdev(ibmw->device)->dev, &mw->mmw);
 261         kfree(mw);
 262
 263         return 0;
 264 }
 265
 266 struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
 267                                         int max_page_list_len)
 268 {
 269         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 270         struct mlx4_ib_mr *mr;
 271         int err;
 272
 273         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 274         if (!mr)
 275                 return ERR_PTR(-ENOMEM);
 276
 277         err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
 278                             max_page_list_len, 0, &mr->mmr);
 279         if (err)
 280                 goto err_free;
 281
 282         err = mlx4_mr_enable(dev->dev, &mr->mmr);
 283         if (err)
 284                 goto err_mr;
 285
 286         mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 287         mr->umem = NULL;
 288
 289         return &mr->ibmr;
 290
 291 err_mr:
 292         (void) mlx4_mr_free(dev->dev, &mr->mmr);
 293
 294 err_free:
 295         kfree(mr);
 296         return ERR_PTR(err);
 297 }
 298
 299 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
 300                                                                int page_list_len)
 301 {
 302         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 303         struct mlx4_ib_fast_reg_page_list *mfrpl;
 304         int size = page_list_len * sizeof (u64);
 305
 306         if (page_list_len > MLX4_MAX_FAST_REG_PAGES)
 307                 return ERR_PTR(-EINVAL);
 308
 309         mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
 310         if (!mfrpl)
 311                 return ERR_PTR(-ENOMEM);
 312
 313         mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
 314         if (!mfrpl->ibfrpl.page_list)
 315                 goto err_free;
 316
 317         mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
 318                                                      size, &mfrpl->map,
 319                                                      GFP_KERNEL);
 320         if (!mfrpl->mapped_page_list)
 321                 goto err_free;
 322
 323         WARN_ON(mfrpl->map & 0x3f);
 324
 325         return &mfrpl->ibfrpl;
 326
 327 err_free:
 328         kfree(mfrpl->ibfrpl.page_list);
 329         kfree(mfrpl);
 330         return ERR_PTR(-ENOMEM);
 331 }
 332
 333 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
 334 {
 335         struct mlx4_ib_dev *dev = to_mdev(page_list->device);
 336         struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
 337         int size = page_list->max_page_list_len * sizeof (u64);
 338
 339         dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
 340                           mfrpl->map);
 341         kfree(mfrpl->ibfrpl.page_list);
 342         kfree(mfrpl);
 343 }
 344
 345 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
 346                                  struct ib_fmr_attr *fmr_attr)
 347 {
 348         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 349         struct mlx4_ib_fmr *fmr;
 350         int err = -ENOMEM;
 351
 352         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 353         if (!fmr)
 354                 return ERR_PTR(-ENOMEM);
 355
 356         err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
 357                              fmr_attr->max_pages, fmr_attr->max_maps,
 358                              fmr_attr->page_shift, &fmr->mfmr);
 359         if (err)
 360                 goto err_free;
 361
 362         err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
 363         if (err)
 364                 goto err_mr;
 365
 366         fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
 367
 368         return &fmr->ibfmr;
 369
 370 err_mr:
 371         (void) mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 372
 373 err_free:
 374         kfree(fmr);
 375
 376         return ERR_PTR(err);
 377 }
 378
 379 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 380                       int npages, u64 iova)
 381 {
 382         struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 383         struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
 384
 385         return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
 386                                  &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 387 }
 388
 389 int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
 390 {
 391         struct ib_fmr *ibfmr;
 392         int err;
 393         struct mlx4_dev *mdev = NULL;
 394
 395         list_for_each_entry(ibfmr, fmr_list, list) {
 396                 if (mdev && to_mdev(ibfmr->device)->dev != mdev)
 397                         return -EINVAL;
 398                 mdev = to_mdev(ibfmr->device)->dev;
 399         }
 400
 401         if (!mdev)
 402                 return 0;
 403
 404         list_for_each_entry(ibfmr, fmr_list, list) {
 405                 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 406
 407                 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 408         }
 409
 410         /*
 411          * Make sure all MPT status updates are visible before issuing
 412          * SYNC_TPT firmware command.
 413          */
 414         wmb();
 415
 416         err = mlx4_SYNC_TPT(mdev);
 417         if (err)
 418                 pr_warn("SYNC_TPT error %d when "
 419                        "unmapping FMRs\n", err);
 420
 421         return 0;
 422 }
 423
 424 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
 425 {
 426         struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 427         struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
 428         int err;
 429
 430         err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
 431
 432         if (!err)
 433                 kfree(ifmr);
 434
 435         return err;
 436 }