LXR linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma

   1/*
   2 * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of EITHER the GNU General Public License
   6 * version 2 as published by the Free Software Foundation or the BSD
   7 * 2-Clause License. This program is distributed in the hope that it
   8 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
   9 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  10 * See the GNU General Public License version 2 for more details at
  11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
  12 *
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program available in the file COPYING in the main
  15 * directory of this source tree.
  16 *
  17 * The BSD 2-Clause License
  18 *
  19 *     Redistribution and use in source and binary forms, with or
  20 *     without modification, are permitted provided that the following
  21 *     conditions are met:
  22 *
  23 *      - Redistributions of source code must retain the above
  24 *        copyright notice, this list of conditions and the following
  25 *        disclaimer.
  26 *
  27 *      - Redistributions in binary form must reproduce the above
  28 *        copyright notice, this list of conditions and the following
  29 *        disclaimer in the documentation and/or other materials
  30 *        provided with the distribution.
  31 *
  32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  36 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  43 * OF THE POSSIBILITY OF SUCH DAMAGE.
  44 */
  45
  46#include <linux/errno.h>
  47#include <linux/slab.h>
  48#include <linux/bitmap.h>
  49
  50#include "pvrdma.h"
  51
  52int pvrdma_page_dir_init(struct pvrdma_dev *dev, struct pvrdma_page_dir *pdir,
  53                         u64 npages, bool alloc_pages)
  54{
  55        u64 i;
  56
  57        if (npages > PVRDMA_PAGE_DIR_MAX_PAGES)
  58                return -EINVAL;
  59
  60        memset(pdir, 0, sizeof(*pdir));
  61
  62        pdir->dir = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
  63                                       &pdir->dir_dma, GFP_KERNEL);
  64        if (!pdir->dir)
  65                goto err;
  66
  67        pdir->ntables = PVRDMA_PAGE_DIR_TABLE(npages - 1) + 1;
  68        pdir->tables = kcalloc(pdir->ntables, sizeof(*pdir->tables),
  69                               GFP_KERNEL);
  70        if (!pdir->tables)
  71                goto err;
  72
  73        for (i = 0; i < pdir->ntables; i++) {
  74                pdir->tables[i] = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
  75                                                (dma_addr_t *)&pdir->dir[i],
  76                                                GFP_KERNEL);
  77                if (!pdir->tables[i])
  78                        goto err;
  79        }
  80
  81        pdir->npages = npages;
  82
  83        if (alloc_pages) {
  84                pdir->pages = kcalloc(npages, sizeof(*pdir->pages),
  85                                      GFP_KERNEL);
  86                if (!pdir->pages)
  87                        goto err;
  88
  89                for (i = 0; i < pdir->npages; i++) {
  90                        dma_addr_t page_dma;
  91
  92                        pdir->pages[i] = dma_alloc_coherent(&dev->pdev->dev,
  93                                                            PAGE_SIZE,
  94                                                            &page_dma,
  95                                                            GFP_KERNEL);
  96                        if (!pdir->pages[i])
  97                                goto err;
  98
  99                        pvrdma_page_dir_insert_dma(pdir, i, page_dma);
 100                }
 101        }
 102
 103        return 0;
 104
 105err:
 106        pvrdma_page_dir_cleanup(dev, pdir);
 107
 108        return -ENOMEM;
 109}
 110
 111static u64 *pvrdma_page_dir_table(struct pvrdma_page_dir *pdir, u64 idx)
 112{
 113        return pdir->tables[PVRDMA_PAGE_DIR_TABLE(idx)];
 114}
 115
 116dma_addr_t pvrdma_page_dir_get_dma(struct pvrdma_page_dir *pdir, u64 idx)
 117{
 118        return pvrdma_page_dir_table(pdir, idx)[PVRDMA_PAGE_DIR_PAGE(idx)];
 119}
 120
 121static void pvrdma_page_dir_cleanup_pages(struct pvrdma_dev *dev,
 122                                          struct pvrdma_page_dir *pdir)
 123{
 124        if (pdir->pages) {
 125                u64 i;
 126
 127                for (i = 0; i < pdir->npages && pdir->pages[i]; i++) {
 128                        dma_addr_t page_dma = pvrdma_page_dir_get_dma(pdir, i);
 129
 130                        dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
 131                                          pdir->pages[i], page_dma);
 132                }
 133
 134                kfree(pdir->pages);
 135        }
 136}
 137
 138static void pvrdma_page_dir_cleanup_tables(struct pvrdma_dev *dev,
 139                                           struct pvrdma_page_dir *pdir)
 140{
 141        if (pdir->tables) {
 142                int i;
 143
 144                pvrdma_page_dir_cleanup_pages(dev, pdir);
 145
 146                for (i = 0; i < pdir->ntables; i++) {
 147                        u64 *table = pdir->tables[i];
 148
 149                        if (table)
 150                                dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
 151                                                  table, pdir->dir[i]);
 152                }
 153
 154                kfree(pdir->tables);
 155        }
 156}
 157
 158void pvrdma_page_dir_cleanup(struct pvrdma_dev *dev,
 159                             struct pvrdma_page_dir *pdir)
 160{
 161        if (pdir->dir) {
 162                pvrdma_page_dir_cleanup_tables(dev, pdir);
 163                dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
 164                                  pdir->dir, pdir->dir_dma);
 165        }
 166}
 167
 168int pvrdma_page_dir_insert_dma(struct pvrdma_page_dir *pdir, u64 idx,
 169                               dma_addr_t daddr)
 170{
 171        u64 *table;
 172
 173        if (idx >= pdir->npages)
 174                return -EINVAL;
 175
 176        table = pvrdma_page_dir_table(pdir, idx);
 177        table[PVRDMA_PAGE_DIR_PAGE(idx)] = daddr;
 178
 179        return 0;
 180}
 181
 182int pvrdma_page_dir_insert_umem(struct pvrdma_page_dir *pdir,
 183                                struct ib_umem *umem, u64 offset)
 184{
 185        u64 i = offset;
 186        int j, entry;
 187        int ret = 0, len = 0;
 188        struct scatterlist *sg;
 189
 190        if (offset >= pdir->npages)
 191                return -EINVAL;
 192
 193        for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
 194                len = sg_dma_len(sg) >> PAGE_SHIFT;
 195                for (j = 0; j < len; j++) {
 196                        dma_addr_t addr = sg_dma_address(sg) +
 197                                          (j << umem->page_shift);
 198
 199                        ret = pvrdma_page_dir_insert_dma(pdir, i, addr);
 200                        if (ret)
 201                                goto exit;
 202
 203                        i++;
 204                }
 205        }
 206
 207exit:
 208        return ret;
 209}
 210
 211int pvrdma_page_dir_insert_page_list(struct pvrdma_page_dir *pdir,
 212                                     u64 *page_list,
 213                                     int num_pages)
 214{
 215        int i;
 216        int ret;
 217
 218        if (num_pages > pdir->npages)
 219                return -EINVAL;
 220
 221        for (i = 0; i < num_pages; i++) {
 222                ret = pvrdma_page_dir_insert_dma(pdir, i, page_list[i]);
 223                if (ret)
 224                        return ret;
 225        }
 226
 227        return 0;
 228}
 229
 230void pvrdma_qp_cap_to_ib(struct ib_qp_cap *dst, const struct pvrdma_qp_cap *src)
 231{
 232        dst->max_send_wr = src->max_send_wr;
 233        dst->max_recv_wr = src->max_recv_wr;
 234        dst->max_send_sge = src->max_send_sge;
 235        dst->max_recv_sge = src->max_recv_sge;
 236        dst->max_inline_data = src->max_inline_data;
 237}
 238
 239void ib_qp_cap_to_pvrdma(struct pvrdma_qp_cap *dst, const struct ib_qp_cap *src)
 240{
 241        dst->max_send_wr = src->max_send_wr;
 242        dst->max_recv_wr = src->max_recv_wr;
 243        dst->max_send_sge = src->max_send_sge;
 244        dst->max_recv_sge = src->max_recv_sge;
 245        dst->max_inline_data = src->max_inline_data;
 246}
 247
 248void pvrdma_gid_to_ib(union ib_gid *dst, const union pvrdma_gid *src)
 249{
 250        BUILD_BUG_ON(sizeof(union pvrdma_gid) != sizeof(union ib_gid));
 251        memcpy(dst, src, sizeof(*src));
 252}
 253
 254void ib_gid_to_pvrdma(union pvrdma_gid *dst, const union ib_gid *src)
 255{
 256        BUILD_BUG_ON(sizeof(union pvrdma_gid) != sizeof(union ib_gid));
 257        memcpy(dst, src, sizeof(*src));
 258}
 259
 260void pvrdma_global_route_to_ib(struct ib_global_route *dst,
 261                               const struct pvrdma_global_route *src)
 262{
 263        pvrdma_gid_to_ib(&dst->dgid, &src->dgid);
 264        dst->flow_label = src->flow_label;
 265        dst->sgid_index = src->sgid_index;
 266        dst->hop_limit = src->hop_limit;
 267        dst->traffic_class = src->traffic_class;
 268}
 269
 270void ib_global_route_to_pvrdma(struct pvrdma_global_route *dst,
 271                               const struct ib_global_route *src)
 272{
 273        ib_gid_to_pvrdma(&dst->dgid, &src->dgid);
 274        dst->flow_label = src->flow_label;
 275        dst->sgid_index = src->sgid_index;
 276        dst->hop_limit = src->hop_limit;
 277        dst->traffic_class = src->traffic_class;
 278}
 279
 280void pvrdma_ah_attr_to_rdma(struct rdma_ah_attr *dst,
 281                            const struct pvrdma_ah_attr *src)
 282{
 283        dst->type = RDMA_AH_ATTR_TYPE_ROCE;
 284        pvrdma_global_route_to_ib(rdma_ah_retrieve_grh(dst), &src->grh);
 285        rdma_ah_set_dlid(dst, src->dlid);
 286        rdma_ah_set_sl(dst, src->sl);
 287        rdma_ah_set_path_bits(dst, src->src_path_bits);
 288        rdma_ah_set_static_rate(dst, src->static_rate);
 289        rdma_ah_set_ah_flags(dst, src->ah_flags);
 290        rdma_ah_set_port_num(dst, src->port_num);
 291        memcpy(dst->roce.dmac, &src->dmac, ETH_ALEN);
 292}
 293
 294void rdma_ah_attr_to_pvrdma(struct pvrdma_ah_attr *dst,
 295                            const struct rdma_ah_attr *src)
 296{
 297        ib_global_route_to_pvrdma(&dst->grh, rdma_ah_read_grh(src));
 298        dst->dlid = rdma_ah_get_dlid(src);
 299        dst->sl = rdma_ah_get_sl(src);
 300        dst->src_path_bits = rdma_ah_get_path_bits(src);
 301        dst->static_rate = rdma_ah_get_static_rate(src);
 302        dst->ah_flags = rdma_ah_get_ah_flags(src);
 303        dst->port_num = rdma_ah_get_port_num(src);
 304        memcpy(&dst->dmac, src->roce.dmac, sizeof(dst->dmac));
 305}
 306
 307u8 ib_gid_type_to_pvrdma(enum ib_gid_type gid_type)
 308{
 309        return (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ?
 310                PVRDMA_GID_TYPE_FLAG_ROCE_V2 :
 311                PVRDMA_GID_TYPE_FLAG_ROCE_V1;
 312}
 313