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 enum { 46 MTHCA_ICM_PAGE_SHIFT = 12, 47 MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT, 48 MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8 49 }; 50 51 struct mthca_icm_chunk { 52 struct list_head list; 53 int npages; 54 int nsg; 55 struct scatterlist mem[MTHCA_ICM_CHUNK_LEN]; 56 }; 57 58 struct mthca_icm { 59 struct list_head chunk_list; 60 int refcount; 61 }; 62 63 struct mthca_icm_table { 64 u64 virt; 65 int num_icm; 66 int num_obj; 67 int obj_size; 68 int lowmem; 69 int coherent; 70 struct mutex mutex; 71 struct mthca_icm *icm[0]; 72 }; 73 74 struct mthca_icm_iter { 75 struct mthca_icm *icm; 76 struct mthca_icm_chunk *chunk; 77 int page_idx; 78 }; 79 80 struct mthca_dev; 81 82 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, 83 gfp_t gfp_mask, int coherent); 84 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent); 85 86 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, 87 u64 virt, int obj_size, 88 int nobj, int reserved, 89 int use_lowmem, int use_coherent); 90 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table); 91 int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); 92 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); 93 void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle); 94 int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, 95 int start, int end); 96 void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table, 97 int start, int end); 98 99 static inline void mthca_icm_first(struct mthca_icm *icm, 100 struct mthca_icm_iter *iter) 101 { 102 iter->icm = icm; 103 iter->chunk = list_empty(&icm->chunk_list) ? 104 NULL : list_entry(icm->chunk_list.next, 105 struct mthca_icm_chunk, list); 106 iter->page_idx = 0; 107 } 108 109 static inline int mthca_icm_last(struct mthca_icm_iter *iter) 110 { 111 return !iter->chunk; 112 } 113 114 static inline void mthca_icm_next(struct mthca_icm_iter *iter) 115 { 116 if (++iter->page_idx >= iter->chunk->nsg) { 117 if (iter->chunk->list.next == &iter->icm->chunk_list) { 118 iter->chunk = NULL; 119 return; 120 } 121 122 iter->chunk = list_entry(iter->chunk->list.next, 123 struct mthca_icm_chunk, list); 124 iter->page_idx = 0; 125 } 126 } 127 128 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter) 129 { 130 return sg_dma_address(&iter->chunk->mem[iter->page_idx]); 131 } 132 133 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter) 134 { 135 return sg_dma_len(&iter->chunk->mem[iter->page_idx]); 136 } 137 138 struct mthca_db_page { 139 DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE); 140 __be64 *db_rec; 141 dma_addr_t mapping; 142 }; 143 144 struct mthca_db_table { 145 int npages; 146 int max_group1; 147 int min_group2; 148 struct mthca_db_page *page; 149 struct mutex mutex; 150 }; 151 152 enum mthca_db_type { 153 MTHCA_DB_TYPE_INVALID = 0x0, 154 MTHCA_DB_TYPE_CQ_SET_CI = 0x1, 155 MTHCA_DB_TYPE_CQ_ARM = 0x2, 156 MTHCA_DB_TYPE_SQ = 0x3, 157 MTHCA_DB_TYPE_RQ = 0x4, 158 MTHCA_DB_TYPE_SRQ = 0x5, 159 MTHCA_DB_TYPE_GROUP_SEP = 0x7 160 }; 161 162 struct mthca_user_db_table; 163 struct mthca_uar; 164 165 int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar, 166 struct mthca_user_db_table *db_tab, int index, u64 uaddr); 167 void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar, 168 struct mthca_user_db_table *db_tab, int index); 169 struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev); 170 void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar, 171 struct mthca_user_db_table *db_tab); 172 173 int mthca_init_db_tab(struct mthca_dev *dev); 174 void mthca_cleanup_db_tab(struct mthca_dev *dev); 175 int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type, 176 u32 qn, __be32 **db); 177 void mthca_free_db(struct mthca_dev *dev, int type, int db_index); 178 179 #endif /* MTHCA_MEMFREE_H */ 180