kernel/2.6.29.6-aldebaran-rt/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
  36 static 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
  45 struct 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
  68 err_mr:
  69         mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
  70
  71 err_free:
  72         kfree(mr);
  73
  74         return ERR_PTR(err);
  75 }
  76
  77 int 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
 117 out:
 118         free_page((unsigned long) pages);
 119         return err;
 120 }
 121
 122 struct 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
 163 err_mr:
 164         mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
 165
 166 err_umem:
 167         ib_umem_release(mr->umem);
 168
 169 err_free:
 170         kfree(mr);
 171
 172         return ERR_PTR(err);
 173 }
 174
 175 int 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
 187 struct 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         mr->umem = NULL;
 209
 210         return &mr->ibmr;
 211
 212 err_mr:
 213         mlx4_mr_free(dev->dev, &mr->mmr);
 214
 215 err_free:
 216         kfree(mr);
 217         return ERR_PTR(err);
 218 }
 219
 220 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
 221                                                                int page_list_len)
 222 {
 223         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 224         struct mlx4_ib_fast_reg_page_list *mfrpl;
 225         int size = page_list_len * sizeof (u64);
 226
 227         if (size > PAGE_SIZE)
 228                 return ERR_PTR(-EINVAL);
 229
 230         mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
 231         if (!mfrpl)
 232                 return ERR_PTR(-ENOMEM);
 233
 234         mfrpl->ibfrpl.page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
 235                                                      size, &mfrpl->map,
 236                                                      GFP_KERNEL);
 237         if (!mfrpl->ibfrpl.page_list)
 238                 goto err_free;
 239
 240         WARN_ON(mfrpl->map & 0x3f);
 241
 242         return &mfrpl->ibfrpl;
 243
 244 err_free:
 245         kfree(mfrpl);
 246         return ERR_PTR(-ENOMEM);
 247 }
 248
 249 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
 250 {
 251         struct mlx4_ib_dev *dev = to_mdev(page_list->device);
 252         struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
 253         int size = page_list->max_page_list_len * sizeof (u64);
 254
 255         dma_free_coherent(&dev->dev->pdev->dev, size, page_list->page_list,
 256                           mfrpl->map);
 257         kfree(mfrpl);
 258 }
 259
 260 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
 261                                  struct ib_fmr_attr *fmr_attr)
 262 {
 263         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 264         struct mlx4_ib_fmr *fmr;
 265         int err = -ENOMEM;
 266
 267         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 268         if (!fmr)
 269                 return ERR_PTR(-ENOMEM);
 270
 271         err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
 272                              fmr_attr->max_pages, fmr_attr->max_maps,
 273                              fmr_attr->page_shift, &fmr->mfmr);
 274         if (err)
 275                 goto err_free;
 276
 277         err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
 278         if (err)
 279                 goto err_mr;
 280
 281         fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
 282
 283         return &fmr->ibfmr;
 284
 285 err_mr:
 286         mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 287
 288 err_free:
 289         kfree(fmr);
 290
 291         return ERR_PTR(err);
 292 }
 293
 294 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 295                       int npages, u64 iova)
 296 {
 297         struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 298         struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
 299
 300         return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
 301                                  &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 302 }
 303
 304 int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
 305 {
 306         struct ib_fmr *ibfmr;
 307         int err;
 308         struct mlx4_dev *mdev = NULL;
 309
 310         list_for_each_entry(ibfmr, fmr_list, list) {
 311                 if (mdev && to_mdev(ibfmr->device)->dev != mdev)
 312                         return -EINVAL;
 313                 mdev = to_mdev(ibfmr->device)->dev;
 314         }
 315
 316         if (!mdev)
 317                 return 0;
 318
 319         list_for_each_entry(ibfmr, fmr_list, list) {
 320                 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 321
 322                 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 323         }
 324
 325         /*
 326          * Make sure all MPT status updates are visible before issuing
 327          * SYNC_TPT firmware command.
 328          */
 329         wmb();
 330
 331         err = mlx4_SYNC_TPT(mdev);
 332         if (err)
 333                 printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
 334                        "unmapping FMRs\n", err);
 335
 336         return 0;
 337 }
 338
 339 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
 340 {
 341         struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 342         struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
 343         int err;
 344
 345         err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
 346
 347         if (!err)
 348                 kfree(ifmr);
 349
 350         return err;
 351 }