mthca_memfree.h

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    1 /*
    2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
    3  * Copyright (c) 2005 Cisco Systems.  All rights reserved.
    4  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
    5  *
    6  * This software is available to you under a choice of one of two
    7  * licenses.  You may choose to be licensed under the terms of the GNU
    8  * General Public License (GPL) Version 2, available from the file
    9  * COPYING in the main directory of this source tree, or the
   10  * OpenIB.org BSD license below:
   11  *
   12  *     Redistribution and use in source and binary forms, with or
   13  *     without modification, are permitted provided that the following
   14  *     conditions are met:
   15  *
   16  *      - Redistributions of source code must retain the above
   17  *        copyright notice, this list of conditions and the following
   18  *        disclaimer.
   19  *
   20  *      - Redistributions in binary form must reproduce the above
   21  *        copyright notice, this list of conditions and the following
   22  *        disclaimer in the documentation and/or other materials
   23  *        provided with the distribution.
   24  *
   25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   32  * SOFTWARE.
   33  */
   34 
   35 #ifndef MTHCA_MEMFREE_H
   36 #define MTHCA_MEMFREE_H
   37 
   38 #include <linux/list.h>
   39 #include <linux/mutex.h>
   40 
   41 #define MTHCA_ICM_CHUNK_LEN \
   42         ((256 - sizeof (struct list_head) - 2 * sizeof (int)) /         \
   43          (sizeof (struct scatterlist)))
   44 
   45 #define MTHCA_ICM_PAGE_SHIFT    12
   46 #define MTHCA_ICM_PAGE_SIZE     (1 << MTHCA_ICM_PAGE_SHIFT)
   47 #define MTHCA_DB_REC_PER_PAGE   (MTHCA_ICM_PAGE_SIZE / 8)
   48 
   49 struct mthca_icm_chunk {
   50         struct list_head   list;
   51         int                npages;
   52         int                nsg;
   53         struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
   54 };
   55 
   56 struct mthca_icm {
   57         struct list_head chunk_list;
   58         int              refcount;
   59 };
   60 
   61 struct mthca_icm_table {
   62         u64               virt;
   63         int               num_icm;
   64         int               num_obj;
   65         int               obj_size;
   66         int               lowmem;
   67         int               coherent;
   68         struct mutex      mutex;
   69         struct mthca_icm *icm[0];
   70 };
   71 
   72 struct mthca_icm_iter {
   73         struct mthca_icm       *icm;
   74         struct mthca_icm_chunk *chunk;
   75         int                     page_idx;
   76 };
   77 
   78 struct mthca_dev;
   79 
   80 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
   81                                   gfp_t gfp_mask, int coherent);
   82 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent);
   83 
   84 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
   85                                               u64 virt, int obj_size,
   86                                               int nobj, int reserved,
   87                                               int use_lowmem, int use_coherent);
   88 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
   89 int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
   90 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
   91 void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle);
   92 int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
   93                           int start, int end);
   94 void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
   95                            int start, int end);
   96 
   97 static inline void mthca_icm_first(struct mthca_icm *icm,
   98                                    struct mthca_icm_iter *iter)
   99 {
  100         iter->icm      = icm;
  101         iter->chunk    = list_empty(&icm->chunk_list) ?
  102                 NULL : list_entry(icm->chunk_list.next,
  103                                   struct mthca_icm_chunk, list);
  104         iter->page_idx = 0;
  105 }
  106 
  107 static inline int mthca_icm_last(struct mthca_icm_iter *iter)
  108 {
  109         return !iter->chunk;
  110 }
  111 
  112 static inline void mthca_icm_next(struct mthca_icm_iter *iter)
  113 {
  114         if (++iter->page_idx >= iter->chunk->nsg) {
  115                 if (iter->chunk->list.next == &iter->icm->chunk_list) {
  116                         iter->chunk = NULL;
  117                         return;
  118                 }
  119 
  120                 iter->chunk = list_entry(iter->chunk->list.next,
  121                                          struct mthca_icm_chunk, list);
  122                 iter->page_idx = 0;
  123         }
  124 }
  125 
  126 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
  127 {
  128         return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
  129 }
  130 
  131 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
  132 {
  133         return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
  134 }
  135 
  136 struct mthca_db_page {
  137         DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
  138         __be64    *db_rec;
  139         dma_addr_t mapping;
  140 };
  141 
  142 struct mthca_db_table {
  143         int                   npages;
  144         int                   max_group1;
  145         int                   min_group2;
  146         struct mthca_db_page *page;
  147         struct mutex          mutex;
  148 };
  149 
  150 enum mthca_db_type {
  151         MTHCA_DB_TYPE_INVALID   = 0x0,
  152         MTHCA_DB_TYPE_CQ_SET_CI = 0x1,
  153         MTHCA_DB_TYPE_CQ_ARM    = 0x2,
  154         MTHCA_DB_TYPE_SQ        = 0x3,
  155         MTHCA_DB_TYPE_RQ        = 0x4,
  156         MTHCA_DB_TYPE_SRQ       = 0x5,
  157         MTHCA_DB_TYPE_GROUP_SEP = 0x7
  158 };
  159 
  160 struct mthca_user_db_table;
  161 struct mthca_uar;
  162 
  163 int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
  164                       struct mthca_user_db_table *db_tab, int index, u64 uaddr);
  165 void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
  166                          struct mthca_user_db_table *db_tab, int index);
  167 struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev);
  168 void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
  169                                struct mthca_user_db_table *db_tab);
  170 
  171 int mthca_init_db_tab(struct mthca_dev *dev);
  172 void mthca_cleanup_db_tab(struct mthca_dev *dev);
  173 int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
  174                    u32 qn, __be32 **db);
  175 void mthca_free_db(struct mthca_dev *dev, int type, int db_index);
  176 
  177 #endif /* MTHCA_MEMFREE_H */

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FreeBSD/Linux Kernel Cross Reference sys/dev/mthca/mthca_memfree.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/mthca/mthca_memfree.h