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 HW_SYNC_SLEEP_TIME_INTERVAL     20
  38 #define HW_SYNC_TIMEOUT_MSECS           (25 * HW_SYNC_SLEEP_TIME_INTERVAL)
  39 #define BT_CMD_SYNC_SHIFT               31
  40
  41 enum {
  42         /* MAP HEM(Hardware Entry Memory) */
  43         HEM_TYPE_QPC = 0,
  44         HEM_TYPE_MTPT,
  45         HEM_TYPE_CQC,
  46         HEM_TYPE_SRQC,
  47         HEM_TYPE_SCCC,
  48         HEM_TYPE_QPC_TIMER,
  49         HEM_TYPE_CQC_TIMER,
  50
  51          /* UNMAP HEM */
  52         HEM_TYPE_MTT,
  53         HEM_TYPE_CQE,
  54         HEM_TYPE_SRQWQE,
  55         HEM_TYPE_IDX,
  56         HEM_TYPE_IRRL,
  57         HEM_TYPE_TRRL,
  58 };
  59
  60 #define HNS_ROCE_HEM_CHUNK_LEN  \
  61          ((256 - sizeof(struct list_head) - 2 * sizeof(int)) /   \
  62          (sizeof(struct scatterlist) + sizeof(void *)))
  63
  64 #define check_whether_bt_num_3(type, hop_num) \
  65         (type < HEM_TYPE_MTT && hop_num == 2)
  66
  67 #define check_whether_bt_num_2(type, hop_num) \
  68         ((type < HEM_TYPE_MTT && hop_num == 1) || \
  69         (type >= HEM_TYPE_MTT && hop_num == 2))
  70
  71 #define check_whether_bt_num_1(type, hop_num) \
  72         ((type < HEM_TYPE_MTT && hop_num == HNS_ROCE_HOP_NUM_0) || \
  73         (type >= HEM_TYPE_MTT && hop_num == 1) || \
  74         (type >= HEM_TYPE_MTT && hop_num == HNS_ROCE_HOP_NUM_0))
  75
  76 enum {
  77          HNS_ROCE_HEM_PAGE_SHIFT = 12,
  78          HNS_ROCE_HEM_PAGE_SIZE  = 1 << HNS_ROCE_HEM_PAGE_SHIFT,
  79 };
  80
  81 struct hns_roce_hem_chunk {
  82         struct list_head         list;
  83         int                      npages;
  84         int                      nsg;
  85         struct scatterlist       mem[HNS_ROCE_HEM_CHUNK_LEN];
  86         void                     *buf[HNS_ROCE_HEM_CHUNK_LEN];
  87 };
  88
  89 struct hns_roce_hem {
  90         struct list_head         chunk_list;
  91         int                      refcount;
  92 };
  93
  94 struct hns_roce_hem_iter {
  95         struct hns_roce_hem              *hem;
  96         struct hns_roce_hem_chunk        *chunk;
  97         int                              page_idx;
  98 };
  99
 100 struct hns_roce_hem_mhop {
 101         u32     hop_num;
 102         u32     buf_chunk_size;
 103         u32     bt_chunk_size;
 104         u32     ba_l0_num;
 105         u32     l0_idx; /* level 0 base address table index */
 106         u32     l1_idx; /* level 1 base address table index */
 107         u32     l2_idx; /* level 2 base address table index */
 108 };
 109
 110 void hns_roce_free_hem(struct hns_roce_dev *hr_dev, struct hns_roce_hem *hem);
 111 int hns_roce_table_get(struct hns_roce_dev *hr_dev,
 112                        struct hns_roce_hem_table *table, unsigned long obj);
 113 void hns_roce_table_put(struct hns_roce_dev *hr_dev,
 114                         struct hns_roce_hem_table *table, unsigned long obj);
 115 void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
 116                           struct hns_roce_hem_table *table, unsigned long obj,
 117                           dma_addr_t *dma_handle);
 118 int hns_roce_table_get_range(struct hns_roce_dev *hr_dev,
 119                              struct hns_roce_hem_table *table,
 120                              unsigned long start, unsigned long end);
 121 void hns_roce_table_put_range(struct hns_roce_dev *hr_dev,
 122                               struct hns_roce_hem_table *table,
 123                               unsigned long start, unsigned long end);
 124 int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
 125                             struct hns_roce_hem_table *table, u32 type,
 126                             unsigned long obj_size, unsigned long nobj,
 127                             int use_lowmem);
 128 void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
 129                                 struct hns_roce_hem_table *table);
 130 void hns_roce_cleanup_hem(struct hns_roce_dev *hr_dev);
 131 int hns_roce_calc_hem_mhop(struct hns_roce_dev *hr_dev,
 132                            struct hns_roce_hem_table *table, unsigned long *obj,
 133                            struct hns_roce_hem_mhop *mhop);
 134 bool hns_roce_check_whether_mhop(struct hns_roce_dev *hr_dev, u32 type);
 135
 136 void hns_roce_hem_list_init(struct hns_roce_hem_list *hem_list,
 137                             int bt_page_order);
 138 int hns_roce_hem_list_calc_root_ba(const struct hns_roce_buf_region *regions,
 139                                    int region_cnt, int unit);
 140 int hns_roce_hem_list_request(struct hns_roce_dev *hr_dev,
 141                               struct hns_roce_hem_list *hem_list,
 142                               const struct hns_roce_buf_region *regions,
 143                               int region_cnt);
 144 void hns_roce_hem_list_release(struct hns_roce_dev *hr_dev,
 145                                struct hns_roce_hem_list *hem_list);
 146 void *hns_roce_hem_list_find_mtt(struct hns_roce_dev *hr_dev,
 147                                  struct hns_roce_hem_list *hem_list,
 148                                  int offset, int *mtt_cnt, u64 *phy_addr);
 149
 150 static inline void hns_roce_hem_first(struct hns_roce_hem *hem,
 151                                       struct hns_roce_hem_iter *iter)
 152 {
 153         iter->hem = hem;
 154         iter->chunk = list_empty(&hem->chunk_list) ? NULL :
 155                                  list_entry(hem->chunk_list.next,
 156                                             struct hns_roce_hem_chunk, list);
 157         iter->page_idx = 0;
 158 }
 159
 160 static inline int hns_roce_hem_last(struct hns_roce_hem_iter *iter)
 161 {
 162         return !iter->chunk;
 163 }
 164
 165 static inline void hns_roce_hem_next(struct hns_roce_hem_iter *iter)
 166 {
 167         if (++iter->page_idx >= iter->chunk->nsg) {
 168                 if (iter->chunk->list.next == &iter->hem->chunk_list) {
 169                         iter->chunk = NULL;
 170                         return;
 171                 }
 172
 173                 iter->chunk = list_entry(iter->chunk->list.next,
 174                                          struct hns_roce_hem_chunk, list);
 175                 iter->page_idx = 0;
 176         }
 177 }
 178
 179 static inline dma_addr_t hns_roce_hem_addr(struct hns_roce_hem_iter *iter)
 180 {
 181         return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
 182 }
 183
 184 #endif /*_HNS_ROCE_HEM_H*/