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 89 static inline void mthca_icm_first(struct mthca_icm *icm, 90 struct mthca_icm_iter *iter) 91 { 92 iter->icm = icm; 93 iter->chunk = list_empty(&icm->chunk_list) ? 94 NULL : list_entry(icm->chunk_list.next, 95 struct mthca_icm_chunk, list); 96 iter->page_idx = 0; 97 } 98 99 static inline int mthca_icm_last(struct mthca_icm_iter *iter) 100 { 101 return !iter->chunk; 102 } 103 104 static inline void mthca_icm_next(struct mthca_icm_iter *iter) 105 { 106 if (++iter->page_idx >= iter->chunk->nsg) { 107 if (iter->chunk->list.next == &iter->icm->chunk_list) { 108 iter->chunk = NULL; 109 return; 110 } 111 112 iter->chunk = list_entry(iter->chunk->list.next, 113 struct mthca_icm_chunk, list); 114 iter->page_idx = 0; 115 } 116 } 117 118 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter) 119 { 120 return sg_dma_address(&iter->chunk->mem[iter->page_idx]); 121 } 122 123 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter) 124 { 125 return sg_dma_len(&iter->chunk->mem[iter->page_idx]); 126 } 127 128 enum { 129 MTHCA_DB_REC_PER_PAGE = 4096 / 8 130 }; 131 132 struct mthca_db_page { 133 DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE); 134 u64 *db_rec; 135 dma_addr_t mapping; 136 }; 137 138 struct mthca_db_table { 139 int npages; 140 int max_group1; 141 int min_group2; 142 struct mthca_db_page *page; 143 struct semaphore mutex; 144 }; 145 146 enum { 147 MTHCA_DB_TYPE_INVALID = 0x0, 148 MTHCA_DB_TYPE_CQ_SET_CI = 0x1, 149 MTHCA_DB_TYPE_CQ_ARM = 0x2, 150 MTHCA_DB_TYPE_SQ = 0x3, 151 MTHCA_DB_TYPE_RQ = 0x4, 152 MTHCA_DB_TYPE_SRQ = 0x5, 153 MTHCA_DB_TYPE_GROUP_SEP = 0x7 154 }; 155 156 int mthca_init_db_tab(struct mthca_dev *dev); 157 void mthca_cleanup_db_tab(struct mthca_dev *dev); 158 int mthca_alloc_db(struct mthca_dev *dev, int type, u32 qn, u32 **db); 159 void mthca_free_db(struct mthca_dev *dev, int type, int db_index); 160 161 #endif /* MTHCA_MEMFREE_H */ 162