2 * Copyright (c) 2016 Hisilicon Limited.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
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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
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #ifndef _HNS_ROCE_HEM_H
35 #define _HNS_ROCE_HEM_H
37 #define HEM_HOP_STEP_DIRECT 0xff
40 /* MAP HEM(Hardware Entry Memory) */
59 #define HNS_ROCE_HEM_CHUNK_LEN \
60 ((256 - sizeof(struct list_head) - 2 * sizeof(int)) / \
61 (sizeof(struct scatterlist) + sizeof(void *)))
63 #define check_whether_bt_num_3(type, hop_num) \
64 (type < HEM_TYPE_MTT && hop_num == 2)
66 #define check_whether_bt_num_2(type, hop_num) \
67 ((type < HEM_TYPE_MTT && hop_num == 1) || \
68 (type >= HEM_TYPE_MTT && hop_num == 2))
70 #define check_whether_bt_num_1(type, hop_num) \
71 ((type < HEM_TYPE_MTT && hop_num == HNS_ROCE_HOP_NUM_0) || \
72 (type >= HEM_TYPE_MTT && hop_num == 1) || \
73 (type >= HEM_TYPE_MTT && hop_num == HNS_ROCE_HOP_NUM_0))
75 struct hns_roce_hem_chunk {
76 struct list_head list;
79 struct scatterlist mem[HNS_ROCE_HEM_CHUNK_LEN];
80 void *buf[HNS_ROCE_HEM_CHUNK_LEN];
84 struct list_head chunk_list;
88 struct hns_roce_hem_iter {
89 struct hns_roce_hem *hem;
90 struct hns_roce_hem_chunk *chunk;
94 struct hns_roce_hem_mhop {
99 u32 l0_idx; /* level 0 base address table index */
100 u32 l1_idx; /* level 1 base address table index */
101 u32 l2_idx; /* level 2 base address table index */
104 void hns_roce_free_hem(struct hns_roce_dev *hr_dev, struct hns_roce_hem *hem);
105 int hns_roce_table_get(struct hns_roce_dev *hr_dev,
106 struct hns_roce_hem_table *table, unsigned long obj);
107 void hns_roce_table_put(struct hns_roce_dev *hr_dev,
108 struct hns_roce_hem_table *table, unsigned long obj);
109 void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
110 struct hns_roce_hem_table *table, unsigned long obj,
111 dma_addr_t *dma_handle);
112 int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
113 struct hns_roce_hem_table *table, u32 type,
114 unsigned long obj_size, unsigned long nobj);
115 void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
116 struct hns_roce_hem_table *table);
117 void hns_roce_cleanup_hem(struct hns_roce_dev *hr_dev);
118 int hns_roce_calc_hem_mhop(struct hns_roce_dev *hr_dev,
119 struct hns_roce_hem_table *table, unsigned long *obj,
120 struct hns_roce_hem_mhop *mhop);
121 bool hns_roce_check_whether_mhop(struct hns_roce_dev *hr_dev, u32 type);
123 void hns_roce_hem_list_init(struct hns_roce_hem_list *hem_list);
124 int hns_roce_hem_list_calc_root_ba(const struct hns_roce_buf_region *regions,
125 int region_cnt, int unit);
126 int hns_roce_hem_list_request(struct hns_roce_dev *hr_dev,
127 struct hns_roce_hem_list *hem_list,
128 const struct hns_roce_buf_region *regions,
129 int region_cnt, unsigned int bt_pg_shift);
130 void hns_roce_hem_list_release(struct hns_roce_dev *hr_dev,
131 struct hns_roce_hem_list *hem_list);
132 void *hns_roce_hem_list_find_mtt(struct hns_roce_dev *hr_dev,
133 struct hns_roce_hem_list *hem_list,
134 int offset, int *mtt_cnt);
136 static inline void hns_roce_hem_first(struct hns_roce_hem *hem,
137 struct hns_roce_hem_iter *iter)
140 iter->chunk = list_empty(&hem->chunk_list) ? NULL :
141 list_entry(hem->chunk_list.next,
142 struct hns_roce_hem_chunk, list);
146 static inline int hns_roce_hem_last(struct hns_roce_hem_iter *iter)
151 static inline void hns_roce_hem_next(struct hns_roce_hem_iter *iter)
153 if (++iter->page_idx >= iter->chunk->nsg) {
154 if (iter->chunk->list.next == &iter->hem->chunk_list) {
159 iter->chunk = list_entry(iter->chunk->list.next,
160 struct hns_roce_hem_chunk, list);
165 static inline dma_addr_t hns_roce_hem_addr(struct hns_roce_hem_iter *iter)
167 return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
170 #endif /* _HNS_ROCE_HEM_H */