drivers/infiniband/hw/hns/hns_roce_hem.h

   1 /*
   2  * Copyright (c) 2016 Hisilicon Limited.
   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 #ifndef _HNS_ROCE_HEM_H
  35 #define _HNS_ROCE_HEM_H
  36
  37 #define HEM_HOP_STEP_DIRECT 0xff
  38
  39 enum {
  40         /* MAP HEM(Hardware Entry Memory) */
  41         HEM_TYPE_QPC = 0,
  42         HEM_TYPE_MTPT,
  43         HEM_TYPE_CQC,
  44         HEM_TYPE_SRQC,
  45         HEM_TYPE_SCCC,
  46         HEM_TYPE_QPC_TIMER,
  47         HEM_TYPE_CQC_TIMER,
  48         HEM_TYPE_GMV,
  49
  50          /* UNMAP HEM */
  51         HEM_TYPE_MTT,
  52         HEM_TYPE_CQE,
  53         HEM_TYPE_SRQWQE,
  54         HEM_TYPE_IDX,
  55         HEM_TYPE_IRRL,
  56         HEM_TYPE_TRRL,
  57 };
  58
  59 #define check_whether_bt_num_3(type, hop_num) \
  60         ((type) < HEM_TYPE_MTT && (hop_num) == 2)
  61
  62 #define check_whether_bt_num_2(type, hop_num) \
  63         (((type) < HEM_TYPE_MTT && (hop_num) == 1) || \
  64         ((type) >= HEM_TYPE_MTT && (hop_num) == 2))
  65
  66 #define check_whether_bt_num_1(type, hop_num) \
  67         (((type) < HEM_TYPE_MTT && (hop_num) == HNS_ROCE_HOP_NUM_0) || \
  68         ((type) >= HEM_TYPE_MTT && (hop_num) == 1) || \
  69         ((type) >= HEM_TYPE_MTT && (hop_num) == HNS_ROCE_HOP_NUM_0))
  70
  71 struct hns_roce_hem {
  72         void *buf;
  73         dma_addr_t dma;
  74         unsigned long size;
  75         refcount_t refcount;
  76 };
  77
  78 struct hns_roce_hem_mhop {
  79         u32     hop_num;
  80         u32     buf_chunk_size;
  81         u32     bt_chunk_size;
  82         u32     ba_l0_num;
  83         u32     l0_idx; /* level 0 base address table index */
  84         u32     l1_idx; /* level 1 base address table index */
  85         u32     l2_idx; /* level 2 base address table index */
  86 };
  87
  88 void hns_roce_free_hem(struct hns_roce_dev *hr_dev, struct hns_roce_hem *hem);
  89 int hns_roce_table_get(struct hns_roce_dev *hr_dev,
  90                        struct hns_roce_hem_table *table, unsigned long obj);
  91 void hns_roce_table_put(struct hns_roce_dev *hr_dev,
  92                         struct hns_roce_hem_table *table, unsigned long obj);
  93 void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
  94                           struct hns_roce_hem_table *table, unsigned long obj,
  95                           dma_addr_t *dma_handle);
  96 int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
  97                             struct hns_roce_hem_table *table, u32 type,
  98                             unsigned long obj_size, unsigned long nobj);
  99 void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
 100                                 struct hns_roce_hem_table *table);
 101 void hns_roce_cleanup_hem(struct hns_roce_dev *hr_dev);
 102 int hns_roce_calc_hem_mhop(struct hns_roce_dev *hr_dev,
 103                            struct hns_roce_hem_table *table, unsigned long *obj,
 104                            struct hns_roce_hem_mhop *mhop);
 105 bool hns_roce_check_whether_mhop(struct hns_roce_dev *hr_dev, u32 type);
 106
 107 void hns_roce_hem_list_init(struct hns_roce_hem_list *hem_list);
 108 int hns_roce_hem_list_calc_root_ba(const struct hns_roce_buf_region *regions,
 109                                    int region_cnt, int unit);
 110 int hns_roce_hem_list_request(struct hns_roce_dev *hr_dev,
 111                               struct hns_roce_hem_list *hem_list,
 112                               const struct hns_roce_buf_region *regions,
 113                               int region_cnt, unsigned int bt_pg_shift);
 114 void hns_roce_hem_list_release(struct hns_roce_dev *hr_dev,
 115                                struct hns_roce_hem_list *hem_list);
 116 void *hns_roce_hem_list_find_mtt(struct hns_roce_dev *hr_dev,
 117                                  struct hns_roce_hem_list *hem_list,
 118                                  int offset, int *mtt_cnt);
 119
 120 #endif /* _HNS_ROCE_HEM_H */