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
  35 static 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
  44 struct 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
  67 err_mr:
  68         mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
  69
  70 err_free:
  71         kfree(mr);
  72
  73         return ERR_PTR(err);
  74 }
  75
  76 int 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
 116 out:
 117         free_page((unsigned long) pages);
 118         return err;
 119 }
 120
 121 struct 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
 161 err_mr:
 162         mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
 163
 164 err_umem:
 165         ib_umem_release(mr->umem);
 166
 167 err_free:
 168         kfree(mr);
 169
 170         return ERR_PTR(err);
 171 }
 172
 173 int 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
 185 struct 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_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
 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
 210 err_mr:
 211         mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
 212
 213 err_free:
 214         kfree(fmr);
 215
 216         return ERR_PTR(err);
 217 }
 218
 219 int 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
 229 int 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
 264 int 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 }