Merge 'ib-jz47xx-battery-prereq' into psy-next
[sfrench/cifs-2.6.git] / 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_TIMEOUT_MSECS           500
38 #define HW_SYNC_SLEEP_TIME_INTERVAL     20
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)))
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 static inline void hns_roce_hem_first(struct hns_roce_hem *hem,
137                                       struct hns_roce_hem_iter *iter)
138 {
139         iter->hem = hem;
140         iter->chunk = list_empty(&hem->chunk_list) ? NULL :
141                                  list_entry(hem->chunk_list.next,
142                                             struct hns_roce_hem_chunk, list);
143         iter->page_idx = 0;
144 }
145
146 static inline int hns_roce_hem_last(struct hns_roce_hem_iter *iter)
147 {
148         return !iter->chunk;
149 }
150
151 static inline void hns_roce_hem_next(struct hns_roce_hem_iter *iter)
152 {
153         if (++iter->page_idx >= iter->chunk->nsg) {
154                 if (iter->chunk->list.next == &iter->hem->chunk_list) {
155                         iter->chunk = NULL;
156                         return;
157                 }
158
159                 iter->chunk = list_entry(iter->chunk->list.next,
160                                          struct hns_roce_hem_chunk, list);
161                 iter->page_idx = 0;
162         }
163 }
164
165 static inline dma_addr_t hns_roce_hem_addr(struct hns_roce_hem_iter *iter)
166 {
167         return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
168 }
169
170 #endif /*_HNS_ROCE_HEM_H*/