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 * $Id$ 35 */ 36 37 #ifndef MTHCA_MEMFREE_H 38 #define MTHCA_MEMFREE_H 39 40 #include <linux/list.h> 41 #include <linux/mutex.h> 42 43 #define MTHCA_ICM_CHUNK_LEN \ 44 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \ 45 (sizeof (struct scatterlist))) 46 47 enum { 48 MTHCA_ICM_PAGE_SHIFT = 12, 49 MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT, 50 MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8 51 }; 52 53 struct mthca_icm_chunk { 54 struct list_head list; 55 int npages; 56 int nsg; 57 struct scatterlist mem[MTHCA_ICM_CHUNK_LEN]; 58 }; 59 60 struct mthca_icm { 61 struct list_head chunk_list; 62 int refcount; 63 }; 64 65 struct mthca_icm_table { 66 u64 virt; 67 int num_icm; 68 int num_obj; 69 int obj_size; 70 int lowmem; 71 int coherent; 72 struct mutex mutex; 73 struct mthca_icm *icm[0]; 74 }; 75 76 struct mthca_icm_iter { 77 struct mthca_icm *icm; 78 struct mthca_icm_chunk *chunk; 79 int page_idx; 80 }; 81 82 struct mthca_dev; 83 84 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, 85 gfp_t gfp_mask, int coherent); 86 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent); 87 88 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, 89 u64 virt, int obj_size, 90 int nobj, int reserved, 91 int use_lowmem, int use_coherent); 92 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table); 93 int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); 94 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); 95 void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle); 96 int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, 97 int start, int end); 98 void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table, 99 int start, int end); 100 101 static inline void mthca_icm_first(struct mthca_icm *icm, 102 struct mthca_icm_iter *iter) 103 { 104 iter->icm = icm; 105 iter->chunk = list_empty(&icm->chunk_list) ? 106 NULL : list_entry(icm->chunk_list.next, 107 struct mthca_icm_chunk, list); 108 iter->page_idx = 0; 109 } 110 111 static inline int mthca_icm_last(struct mthca_icm_iter *iter) 112 { 113 return !iter->chunk; 114 } 115 116 static inline void mthca_icm_next(struct mthca_icm_iter *iter) 117 { 118 if (++iter->page_idx >= iter->chunk->nsg) { 119 if (iter->chunk->list.next == &iter->icm->chunk_list) { 120 iter->chunk = NULL; 121 return; 122 } 123 124 iter->chunk = list_entry(iter->chunk->list.next, 125 struct mthca_icm_chunk, list); 126 iter->page_idx = 0; 127 } 128 } 129 130 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter) 131 { 132 return sg_dma_address(&iter->chunk->mem[iter->page_idx]); 133 } 134 135 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter) 136 { 137 return sg_dma_len(&iter->chunk->mem[iter->page_idx]); 138 } 139 140 struct mthca_db_page { 141 DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE); 142 __be64 *db_rec; 143 dma_addr_t mapping; 144 }; 145 146 struct mthca_db_table { 147 int npages; 148 int max_group1; 149 int min_group2; 150 struct mthca_db_page *page; 151 struct mutex mutex; 152 }; 153 154 enum mthca_db_type { 155 MTHCA_DB_TYPE_INVALID = 0x0, 156 MTHCA_DB_TYPE_CQ_SET_CI = 0x1, 157 MTHCA_DB_TYPE_CQ_ARM = 0x2, 158 MTHCA_DB_TYPE_SQ = 0x3, 159 MTHCA_DB_TYPE_RQ = 0x4, 160 MTHCA_DB_TYPE_SRQ = 0x5, 161 MTHCA_DB_TYPE_GROUP_SEP = 0x7 162 }; 163 164 struct mthca_user_db_table; 165 struct mthca_uar; 166 167 int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar, 168 struct mthca_user_db_table *db_tab, int index, u64 uaddr); 169 void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar, 170 struct mthca_user_db_table *db_tab, int index); 171 struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev); 172 void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar, 173 struct mthca_user_db_table *db_tab); 174 175 int mthca_init_db_tab(struct mthca_dev *dev); 176 void mthca_cleanup_db_tab(struct mthca_dev *dev); 177 int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type, 178 u32 qn, __be32 **db); 179 void mthca_free_db(struct mthca_dev *dev, int type, int db_index); 180 181 #endif /* MTHCA_MEMFREE_H */ 182