1 /* 2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 * $Id$ 33 */ 34 35 #ifndef MTHCA_MEMFREE_H 36 #define MTHCA_MEMFREE_H 37 38 #include <linux/list.h> 39 #include <linux/pci.h> 40 41 #include <asm/semaphore.h> 42 43 #define MTHCA_ICM_CHUNK_LEN \ 44 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \ 45 (sizeof (struct scatterlist))) 46 47 struct mthca_icm_chunk { 48 struct list_head list; 49 int npages; 50 int nsg; 51 struct scatterlist mem[MTHCA_ICM_CHUNK_LEN]; 52 }; 53 54 struct mthca_icm { 55 struct list_head chunk_list; 56 int refcount; 57 }; 58 59 struct mthca_icm_table { 60 u64 virt; 61 int num_icm; 62 int num_obj; 63 int obj_size; 64 int lowmem; 65 struct semaphore mutex; 66 struct mthca_icm *icm[0]; 67 }; 68 69 struct mthca_icm_iter { 70 struct mthca_icm *icm; 71 struct mthca_icm_chunk *chunk; 72 int page_idx; 73 }; 74 75 struct mthca_dev; 76 77 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, 78 unsigned int gfp_mask); 79 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm); 80 81 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, 82 u64 virt, int obj_size, 83 int nobj, int reserved, 84 int use_lowmem); 85 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table); 86 int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); 87 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); 88 void *mthca_table_find(struct mthca_icm_table *table, int obj); 89 int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, 90 int start, int end); 91 void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table, 92 int start, int end); 93 94 static inline void mthca_icm_first(struct mthca_icm *icm, 95 struct mthca_icm_iter *iter) 96 { 97 iter->icm = icm; 98 iter->chunk = list_empty(&icm->chunk_list) ? 99 NULL : list_entry(icm->chunk_list.next, 100 struct mthca_icm_chunk, list); 101 iter->page_idx = 0; 102 } 103 104 static inline int mthca_icm_last(struct mthca_icm_iter *iter) 105 { 106 return !iter->chunk; 107 } 108 109 static inline void mthca_icm_next(struct mthca_icm_iter *iter) 110 { 111 if (++iter->page_idx >= iter->chunk->nsg) { 112 if (iter->chunk->list.next == &iter->icm->chunk_list) { 113 iter->chunk = NULL; 114 return; 115 } 116 117 iter->chunk = list_entry(iter->chunk->list.next, 118 struct mthca_icm_chunk, list); 119 iter->page_idx = 0; 120 } 121 } 122 123 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter) 124 { 125 return sg_dma_address(&iter->chunk->mem[iter->page_idx]); 126 } 127 128 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter) 129 { 130 return sg_dma_len(&iter->chunk->mem[iter->page_idx]); 131 } 132 133 enum { 134 MTHCA_DB_REC_PER_PAGE = 4096 / 8 135 }; 136 137 struct mthca_db_page { 138 DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE); 139 u64 *db_rec; 140 dma_addr_t mapping; 141 }; 142 143 struct mthca_db_table { 144 int npages; 145 int max_group1; 146 int min_group2; 147 struct mthca_db_page *page; 148 struct semaphore mutex; 149 }; 150 151 enum { 152 MTHCA_DB_TYPE_INVALID = 0x0, 153 MTHCA_DB_TYPE_CQ_SET_CI = 0x1, 154 MTHCA_DB_TYPE_CQ_ARM = 0x2, 155 MTHCA_DB_TYPE_SQ = 0x3, 156 MTHCA_DB_TYPE_RQ = 0x4, 157 MTHCA_DB_TYPE_SRQ = 0x5, 158 MTHCA_DB_TYPE_GROUP_SEP = 0x7 159 }; 160 161 int mthca_init_db_tab(struct mthca_dev *dev); 162 void mthca_cleanup_db_tab(struct mthca_dev *dev); 163 int mthca_alloc_db(struct mthca_dev *dev, int type, u32 qn, u32 **db); 164 void mthca_free_db(struct mthca_dev *dev, int type, int db_index); 165 166 #endif /* MTHCA_MEMFREE_H */ 167