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 */ 178