/* * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef MLX4_ICM_H #define MLX4_ICM_H #include <linux/list.h> #include <linux/pci.h> #include <linux/mutex.h> #define MLX4_ICM_CHUNK_LEN \ ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \ (sizeof (struct scatterlist))) enum { MLX4_ICM_PAGE_SHIFT = 12, MLX4_ICM_PAGE_SIZE = 1 << MLX4_ICM_PAGE_SHIFT, }; struct mlx4_icm_chunk { struct list_head list; int npages; int nsg; struct scatterlist mem[MLX4_ICM_CHUNK_LEN]; }; struct mlx4_icm { struct list_head chunk_list; int refcount; }; struct mlx4_icm_iter { struct mlx4_icm *icm; struct mlx4_icm_chunk *chunk; int page_idx; }; struct mlx4_dev; struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, gfp_t gfp_mask, int coherent); void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent); int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj); void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj); int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 start, u32 end); void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 start, u32 end); int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table, u64 virt, int obj_size, u32 nobj, int reserved, int use_lowmem, int use_coherent); void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table); void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj, dma_addr_t *dma_handle); static inline void mlx4_icm_first(struct mlx4_icm *icm, struct mlx4_icm_iter *iter) { iter->icm = icm; iter->chunk = list_empty(&icm->chunk_list) ? NULL : list_entry(icm->chunk_list.next, struct mlx4_icm_chunk, list); iter->page_idx = 0; } static inline int mlx4_icm_last(struct mlx4_icm_iter *iter) { return !iter->chunk; } static inline void mlx4_icm_next(struct mlx4_icm_iter *iter) { if (++iter->page_idx >= iter->chunk->nsg) { if (iter->chunk->list.next == &iter->icm->chunk_list) { iter->chunk = NULL; return; } iter->chunk = list_entry(iter->chunk->list.next, struct mlx4_icm_chunk, list); iter->page_idx = 0; } } static inline dma_addr_t mlx4_icm_addr(struct mlx4_icm_iter *iter) { return sg_dma_address(&iter->chunk->mem[iter->page_idx]); } static inline unsigned long mlx4_icm_size(struct mlx4_icm_iter *iter) { return sg_dma_len(&iter->chunk->mem[iter->page_idx]); } int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm); int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev); #endif /* MLX4_ICM_H */