180 lines
5.6 KiB
C
Executable file
180 lines
5.6 KiB
C
Executable file
/*
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* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Cisco Systems. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef MTHCA_MEMFREE_H
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#define MTHCA_MEMFREE_H
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#include <linux/list.h>
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#include <linux/mutex.h>
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#define MTHCA_ICM_CHUNK_LEN \
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((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
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(sizeof (struct scatterlist)))
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enum {
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MTHCA_ICM_PAGE_SHIFT = 12,
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MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT,
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MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8
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};
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struct mthca_icm_chunk {
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struct list_head list;
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int npages;
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int nsg;
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struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
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};
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struct mthca_icm {
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struct list_head chunk_list;
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int refcount;
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};
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struct mthca_icm_table {
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u64 virt;
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int num_icm;
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int num_obj;
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int obj_size;
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int lowmem;
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int coherent;
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struct mutex mutex;
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struct mthca_icm *icm[0];
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};
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struct mthca_icm_iter {
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struct mthca_icm *icm;
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struct mthca_icm_chunk *chunk;
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int page_idx;
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};
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struct mthca_dev;
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struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
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gfp_t gfp_mask, int coherent);
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void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent);
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struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
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u64 virt, int obj_size,
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int nobj, int reserved,
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int use_lowmem, int use_coherent);
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void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
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int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
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void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
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void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle);
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int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
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int start, int end);
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void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
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int start, int end);
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static inline void mthca_icm_first(struct mthca_icm *icm,
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struct mthca_icm_iter *iter)
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{
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iter->icm = icm;
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iter->chunk = list_empty(&icm->chunk_list) ?
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NULL : list_entry(icm->chunk_list.next,
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struct mthca_icm_chunk, list);
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iter->page_idx = 0;
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}
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static inline int mthca_icm_last(struct mthca_icm_iter *iter)
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{
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return !iter->chunk;
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}
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static inline void mthca_icm_next(struct mthca_icm_iter *iter)
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{
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if (++iter->page_idx >= iter->chunk->nsg) {
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if (iter->chunk->list.next == &iter->icm->chunk_list) {
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iter->chunk = NULL;
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return;
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}
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iter->chunk = list_entry(iter->chunk->list.next,
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struct mthca_icm_chunk, list);
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iter->page_idx = 0;
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}
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}
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static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
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{
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return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
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}
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static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
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{
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return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
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}
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struct mthca_db_page {
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DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
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__be64 *db_rec;
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dma_addr_t mapping;
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};
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struct mthca_db_table {
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int npages;
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int max_group1;
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int min_group2;
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struct mthca_db_page *page;
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struct mutex mutex;
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};
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enum mthca_db_type {
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MTHCA_DB_TYPE_INVALID = 0x0,
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MTHCA_DB_TYPE_CQ_SET_CI = 0x1,
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MTHCA_DB_TYPE_CQ_ARM = 0x2,
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MTHCA_DB_TYPE_SQ = 0x3,
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MTHCA_DB_TYPE_RQ = 0x4,
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MTHCA_DB_TYPE_SRQ = 0x5,
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MTHCA_DB_TYPE_GROUP_SEP = 0x7
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};
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struct mthca_user_db_table;
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struct mthca_uar;
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int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
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struct mthca_user_db_table *db_tab, int index, u64 uaddr);
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void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
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struct mthca_user_db_table *db_tab, int index);
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struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev);
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void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
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struct mthca_user_db_table *db_tab);
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int mthca_init_db_tab(struct mthca_dev *dev);
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void mthca_cleanup_db_tab(struct mthca_dev *dev);
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int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
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u32 qn, __be32 **db);
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void mthca_free_db(struct mthca_dev *dev, int type, int db_index);
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#endif /* MTHCA_MEMFREE_H */
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