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/*
* Copyright (c) 2016 Hisilicon Limited.
* Copyright (c) 2007, 2008 Mellanox Technologies. 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 _HNS_ROCE_HEM_H
#define _HNS_ROCE_HEM_H
enum {
/* MAP HEM(Hardware Entry Memory) */
HEM_TYPE_QPC = 0,
HEM_TYPE_MTPT,
HEM_TYPE_CQC,
HEM_TYPE_SRQC,
/* UNMAP HEM */
HEM_TYPE_MTT,
HEM_TYPE_IRRL,
};
#define HNS_ROCE_HEM_CHUNK_LEN \
((256 - sizeof(struct list_head) - 2 * sizeof(int)) / \
(sizeof(struct scatterlist)))
enum {
HNS_ROCE_HEM_PAGE_SHIFT = 12,
HNS_ROCE_HEM_PAGE_SIZE = 1 << HNS_ROCE_HEM_PAGE_SHIFT,
};
struct hns_roce_hem_chunk {
struct list_head list;
int npages;
int nsg;
struct scatterlist mem[HNS_ROCE_HEM_CHUNK_LEN];
};
struct hns_roce_hem {
struct list_head chunk_list;
int refcount;
};
struct hns_roce_hem_iter {
struct hns_roce_hem *hem;
struct hns_roce_hem_chunk *chunk;
int page_idx;
};
void hns_roce_free_hem(struct hns_roce_dev *hr_dev, struct hns_roce_hem *hem);
int hns_roce_table_get(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table, unsigned long obj);
void hns_roce_table_put(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table, unsigned long obj);
void *hns_roce_table_find(struct hns_roce_hem_table *table, unsigned long obj,
dma_addr_t *dma_handle);
int hns_roce_table_get_range(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table,
unsigned long start, unsigned long end);
void hns_roce_table_put_range(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table,
unsigned long start, unsigned long end);
int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table, u32 type,
unsigned long obj_size, unsigned long nobj,
int use_lowmem);
void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table);
void hns_roce_cleanup_hem(struct hns_roce_dev *hr_dev);
static inline void hns_roce_hem_first(struct hns_roce_hem *hem,
struct hns_roce_hem_iter *iter)
{
iter->hem = hem;
iter->chunk = list_empty(&hem->chunk_list) ? NULL :
list_entry(hem->chunk_list.next,
struct hns_roce_hem_chunk, list);
iter->page_idx = 0;
}
static inline int hns_roce_hem_last(struct hns_roce_hem_iter *iter)
{
return !iter->chunk;
}
static inline void hns_roce_hem_next(struct hns_roce_hem_iter *iter)
{
if (++iter->page_idx >= iter->chunk->nsg) {
if (iter->chunk->list.next == &iter->hem->chunk_list) {
iter->chunk = NULL;
return;
}
iter->chunk = list_entry(iter->chunk->list.next,
struct hns_roce_hem_chunk, list);
iter->page_idx = 0;
}
}
static inline dma_addr_t hns_roce_hem_addr(struct hns_roce_hem_iter *iter)
{
return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
}
#endif /*_HNS_ROCE_HEM_H*/
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