1/* 2 * Copyright (c) 2005, 2006, 2007, 2008, 2014 Mellanox Technologies. All rights reserved. 3 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34#ifndef MLX4_ICM_H 35#define MLX4_ICM_H 36 37#include <linux/list.h> 38/*#include <linux/pci.h> 39 #include <linux/mutex.h> 40 */ 41#include <linux/scatterlist.h> 42 43#include "mlx4.h" 44 45#define MLX4_ICM_CHUNK_LEN \ 46 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \ 47 (sizeof (struct scatterlist))) 48 49enum { 50 MLX4_ICM_PAGE_SHIFT = 12, MLX4_ICM_PAGE_SIZE = 1 << MLX4_ICM_PAGE_SHIFT, 51}; 52struct mlx4_icm_chunk { 53 struct list_head list; 54 int npages; 55 int nsg; 56 struct scatterlist mem[MLX4_ICM_CHUNK_LEN]; 57}; 58struct mlx4_icm { 59 struct list_head chunk_list; 60 int refcount; 61}; 62struct mlx4_icm_iter { 63 struct mlx4_icm *icm; 64 struct mlx4_icm_chunk *chunk; 65 int page_idx; 66}; 67/* 68 struct mlx4_dev; 69 */ 70 71struct mlx4_icm *mlx4_alloc_icm(struct mlx4_priv *priv, int npages, 72 int coherent); 73/* 74 void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent); 75 */ 76int mlx4_table_get(struct mlx4_priv *priv, struct mlx4_icm_table *table, 77 u32 obj); 78void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj); 79int mlx4_table_get_range(struct mlx4_priv *priv, struct mlx4_icm_table *table, 80 u32 start, u32 end); 81/* 82 void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table, 83 u32 start, u32 end); 84 */ 85 86int mlx4_init_icm_table(struct mlx4_priv *priv, struct mlx4_icm_table *table, 87 u64 virt, int obj_size, u64 nobj, int reserved, int use_lowmem, 88 int use_coherent); 89/* 90 void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table); 91 */ 92void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj, 93 genpaddr_t *dma_handle); 94static inline void mlx4_icm_first(struct mlx4_icm *icm, 95 struct mlx4_icm_iter *iter) { 96 iter->icm = icm; 97 iter->chunk = 98 list_empty(&icm->chunk_list) ? 99 NULL : 100 list_entry(icm->chunk_list.next, struct mlx4_icm_chunk, 101 list); 102 iter->page_idx = 0; 103} 104 105static inline int mlx4_icm_last(struct mlx4_icm_iter *iter) { 106 return !iter->chunk; 107} 108 109static inline void mlx4_icm_next(struct mlx4_icm_iter *iter) { 110 if (++iter->page_idx >= iter->chunk->nsg) { 111 if (iter->chunk->list.next == &iter->icm->chunk_list) { 112 iter->chunk = NULL; 113 return; 114 } 115 116 iter->chunk = list_entry(iter->chunk->list.next, struct mlx4_icm_chunk, 117 list); 118 iter->page_idx = 0; 119 } 120} 121 122static inline genpaddr_t mlx4_icm_addr(struct mlx4_icm_iter *iter) { 123 return sg_dma_address(&iter->chunk->mem[iter->page_idx]); 124} 125 126static inline unsigned long mlx4_icm_size(struct mlx4_icm_iter *iter) { 127 return iter->chunk->mem[iter->page_idx].length; 128} 129 130int mlx4_MAP_ICM_AUX(struct mlx4_priv *priv, struct mlx4_icm *icm); 131/*int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev);*/ 132 133#endif /* MLX4_ICM_H */ 134