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                MLX4_PERM_LOCAL_READ;
  45 }
  46
  47 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
  48 {
  49         struct mlx4_ib_mr *mr;
  50         int err;
  51
  52         mr = kmalloc(sizeof *mr, GFP_KERNEL);
  53         if (!mr)
  54                 return ERR_PTR(-ENOMEM);
  55
  56         err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
  57                             ~0ull, convert_access(acc), 0, 0, &mr->mmr);
  58         if (err)
  59                 goto err_free;
  60
  61         err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
  62         if (err)
  63                 goto err_mr;
  64
  65         mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
  66         mr->umem = NULL;
  67
  68         return &mr->ibmr;
  69
  70 err_mr:
  71         mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
  72
  73 err_free:
  74         kfree(mr);
  75
  76         return ERR_PTR(err);
  77 }
  78
  79 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
  80                            struct ib_umem *umem)
  81 {
  82         u64 *pages;
  83         struct ib_umem_chunk *chunk;
  84         int i, j, k;
  85         int n;
  86         int len;
  87         int err = 0;
  88
  89         pages = (u64 *) __get_free_page(GFP_KERNEL);
  90         if (!pages)
  91                 return -ENOMEM;
  92
  93         i = n = 0;
  94
  95         list_for_each_entry(chunk, &umem->chunk_list, list)
  96                 for (j = 0; j < chunk->nmap; ++j) {
  97                         len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
  98                         for (k = 0; k < len; ++k) {
  99                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
 100                                         umem->page_size * k;
 101                                 /*
 102                                  * Be friendly to mlx4_write_mtt() and
 103                                  * pass it chunks of appropriate size.
 104                                  */
 105                                 if (i == PAGE_SIZE / sizeof (u64)) {
 106                                         err = mlx4_write_mtt(dev->dev, mtt, n,
 107                                                              i, pages);
 108                                         if (err)
 109                                                 goto out;
 110                                         n += i;
 111                                         i = 0;
 112                                 }
 113                         }
 114                 }
 115
 116         if (i)
 117                 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
 118
 119 out:
 120         free_page((unsigned long) pages);
 121         return err;
 122 }
 123
 124 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 125                                   u64 virt_addr, int access_flags,
 126                                   struct ib_udata *udata)
 127 {
 128         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 129         struct mlx4_ib_mr *mr;
 130         int shift;
 131         int err;
 132         int n;
 133
 134         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 135         if (!mr)
 136                 return ERR_PTR(-ENOMEM);
 137
 138         mr->umem = ib_umem_get(pd->uobject->context, start, length,
 139                                access_flags, 0);
 140         if (IS_ERR(mr->umem)) {
 141                 err = PTR_ERR(mr->umem);
 142                 goto err_free;
 143         }
 144
 145         n = ib_umem_page_count(mr->umem);
 146         shift = ilog2(mr->umem->page_size);
 147
 148         err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
 149                             convert_access(access_flags), n, shift, &mr->mmr);
 150         if (err)
 151                 goto err_umem;
 152
 153         err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
 154         if (err)
 155                 goto err_mr;
 156
 157         err = mlx4_mr_enable(dev->dev, &mr->mmr);
 158         if (err)
 159                 goto err_mr;
 160
 161         mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 162
 163         return &mr->ibmr;
 164
 165 err_mr:
 166         mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
 167
 168 err_umem:
 169         ib_umem_release(mr->umem);
 170
 171 err_free:
 172         kfree(mr);
 173
 174         return ERR_PTR(err);
 175 }
 176
 177 int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
 178 {
 179         struct mlx4_ib_mr *mr = to_mmr(ibmr);
 180
 181         mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
 182         if (mr->umem)
 183                 ib_umem_release(mr->umem);
 184         kfree(mr);
 185
 186         return 0;
 187 }
 188
 189 struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
 190                                         int max_page_list_len)
 191 {
 192         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 193         struct mlx4_ib_mr *mr;
 194         int err;
 195
 196         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 197         if (!mr)
 198                 return ERR_PTR(-ENOMEM);
 199
 200         err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
 201                             max_page_list_len, 0, &mr->mmr);
 202         if (err)
 203                 goto err_free;
 204
 205         err = mlx4_mr_enable(dev->dev, &mr->mmr);
 206         if (err)
 207                 goto err_mr;
 208
 209         mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
 210         mr->umem = NULL;
 211
 212         return &mr->ibmr;
 213
 214 err_mr:
 215         mlx4_mr_free(dev->dev, &mr->mmr);
 216
 217 err_free:
 218         kfree(mr);
 219         return ERR_PTR(err);
 220 }
 221
 222 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
 223                                                                int page_list_len)
 224 {
 225         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 226         struct mlx4_ib_fast_reg_page_list *mfrpl;
 227         int size = page_list_len * sizeof (u64);
 228
 229         if (page_list_len > MLX4_MAX_FAST_REG_PAGES)
 230                 return ERR_PTR(-EINVAL);
 231
 232         mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
 233         if (!mfrpl)
 234                 return ERR_PTR(-ENOMEM);
 235
 236         mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
 237         if (!mfrpl->ibfrpl.page_list)
 238                 goto err_free;
 239
 240         mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
 241                                                      size, &mfrpl->map,
 242                                                      GFP_KERNEL);
 243         if (!mfrpl->mapped_page_list)
 244                 goto err_free;
 245
 246         WARN_ON(mfrpl->map & 0x3f);
 247
 248         return &mfrpl->ibfrpl;
 249
 250 err_free:
 251         kfree(mfrpl->ibfrpl.page_list);
 252         kfree(mfrpl);
 253         return ERR_PTR(-ENOMEM);
 254 }
 255
 256 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
 257 {
 258         struct mlx4_ib_dev *dev = to_mdev(page_list->device);
 259         struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
 260         int size = page_list->max_page_list_len * sizeof (u64);
 261
 262         dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
 263                           mfrpl->map);
 264         kfree(mfrpl->ibfrpl.page_list);
 265         kfree(mfrpl);
 266 }
 267
 268 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
 269                                  struct ib_fmr_attr *fmr_attr)
 270 {
 271         struct mlx4_ib_dev *dev = to_mdev(pd->device);
 272         struct mlx4_ib_fmr *fmr;
 273         int err = -ENOMEM;
 274
 275         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 276         if (!fmr)
 277                 return ERR_PTR(-ENOMEM);
 278
 279         err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
 280                              fmr_attr->max_pages, fmr_attr->max_maps,
 281                              fmr_attr->page_shift, &fmr->mfmr);
 282         if (err)
 283                 goto err_free;
 284
 285         err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
 286         if (err)
 287                 goto err_mr;
 288
 289         fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
 290
 291         return &fmr->ibfmr;
 292
 293 err_mr:
 294         mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 295
 296 err_free:
 297         kfree(fmr);
 298
 299         return ERR_PTR(err);
 300 }
 301
 302 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
 303                       int npages, u64 iova)
 304 {
 305         struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 306         struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
 307
 308         return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
 309                                  &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 310 }
 311
 312 int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
 313 {
 314         struct ib_fmr *ibfmr;
 315         int err;
 316         struct mlx4_dev *mdev = NULL;
 317
 318         list_for_each_entry(ibfmr, fmr_list, list) {
 319                 if (mdev && to_mdev(ibfmr->device)->dev != mdev)
 320                         return -EINVAL;
 321                 mdev = to_mdev(ibfmr->device)->dev;
 322         }
 323
 324         if (!mdev)
 325                 return 0;
 326
 327         list_for_each_entry(ibfmr, fmr_list, list) {
 328                 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 329
 330                 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
 331         }
 332
 333         /*
 334          * Make sure all MPT status updates are visible before issuing
 335          * SYNC_TPT firmware command.
 336          */
 337         wmb();
 338
 339         err = mlx4_SYNC_TPT(mdev);
 340         if (err)
 341                 printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
 342                        "unmapping FMRs\n", err);
 343
 344         return 0;
 345 }
 346
 347 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
 348 {
 349         struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
 350         struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
 351         int err;
 352
 353         err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
 354
 355         if (!err)
 356                 kfree(ifmr);
 357
 358         return err;
 359 }