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![Leon Romanovsky](/assets/img/avatar_default.png)
The "end" variable is declared as unsigned and can't be negative, it
leads to the situation where timeout limit is not honored, so let's
convert logic to ensure that loop is bounded.
drivers/infiniband/hw/hns/hns_roce_hw_v1.c: In function _hns_roce_v1_clear_hem_:
drivers/infiniband/hw/hns/hns_roce_hw_v1.c:2471:12: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
2471 | if (end < 0) {
| ^
Fixes: 669cefb654
("RDMA/hns: Remove jiffies operation in disable interrupt context")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
185 lines
5.9 KiB
C
185 lines
5.9 KiB
C
/*
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* Copyright (c) 2016 Hisilicon Limited.
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* Copyright (c) 2007, 2008 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 _HNS_ROCE_HEM_H
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#define _HNS_ROCE_HEM_H
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#define HW_SYNC_SLEEP_TIME_INTERVAL 20
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#define HW_SYNC_TIMEOUT_MSECS (25 * HW_SYNC_SLEEP_TIME_INTERVAL)
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#define BT_CMD_SYNC_SHIFT 31
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enum {
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/* MAP HEM(Hardware Entry Memory) */
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HEM_TYPE_QPC = 0,
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HEM_TYPE_MTPT,
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HEM_TYPE_CQC,
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HEM_TYPE_SRQC,
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HEM_TYPE_SCCC,
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HEM_TYPE_QPC_TIMER,
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HEM_TYPE_CQC_TIMER,
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/* UNMAP HEM */
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HEM_TYPE_MTT,
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HEM_TYPE_CQE,
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HEM_TYPE_SRQWQE,
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HEM_TYPE_IDX,
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HEM_TYPE_IRRL,
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HEM_TYPE_TRRL,
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};
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#define HNS_ROCE_HEM_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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#define check_whether_bt_num_3(type, hop_num) \
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(type < HEM_TYPE_MTT && hop_num == 2)
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#define check_whether_bt_num_2(type, hop_num) \
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((type < HEM_TYPE_MTT && hop_num == 1) || \
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(type >= HEM_TYPE_MTT && hop_num == 2))
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#define check_whether_bt_num_1(type, hop_num) \
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((type < HEM_TYPE_MTT && hop_num == HNS_ROCE_HOP_NUM_0) || \
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(type >= HEM_TYPE_MTT && hop_num == 1) || \
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(type >= HEM_TYPE_MTT && hop_num == HNS_ROCE_HOP_NUM_0))
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enum {
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HNS_ROCE_HEM_PAGE_SHIFT = 12,
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HNS_ROCE_HEM_PAGE_SIZE = 1 << HNS_ROCE_HEM_PAGE_SHIFT,
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};
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struct hns_roce_hem_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[HNS_ROCE_HEM_CHUNK_LEN];
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void *buf[HNS_ROCE_HEM_CHUNK_LEN];
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};
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struct hns_roce_hem {
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struct list_head chunk_list;
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int refcount;
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};
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struct hns_roce_hem_iter {
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struct hns_roce_hem *hem;
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struct hns_roce_hem_chunk *chunk;
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int page_idx;
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};
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struct hns_roce_hem_mhop {
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u32 hop_num;
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u32 buf_chunk_size;
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u32 bt_chunk_size;
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u32 ba_l0_num;
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u32 l0_idx;/* level 0 base address table index */
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u32 l1_idx;/* level 1 base address table index */
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u32 l2_idx;/* level 2 base address table index */
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};
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void hns_roce_free_hem(struct hns_roce_dev *hr_dev, struct hns_roce_hem *hem);
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int hns_roce_table_get(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table, unsigned long obj);
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void hns_roce_table_put(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table, unsigned long obj);
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void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table, unsigned long obj,
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dma_addr_t *dma_handle);
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int hns_roce_table_get_range(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table,
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unsigned long start, unsigned long end);
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void hns_roce_table_put_range(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table,
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unsigned long start, unsigned long end);
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int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table, u32 type,
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unsigned long obj_size, unsigned long nobj,
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int use_lowmem);
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void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table);
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void hns_roce_cleanup_hem(struct hns_roce_dev *hr_dev);
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int hns_roce_calc_hem_mhop(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_table *table, unsigned long *obj,
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struct hns_roce_hem_mhop *mhop);
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bool hns_roce_check_whether_mhop(struct hns_roce_dev *hr_dev, u32 type);
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void hns_roce_hem_list_init(struct hns_roce_hem_list *hem_list,
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int bt_page_order);
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int hns_roce_hem_list_calc_root_ba(const struct hns_roce_buf_region *regions,
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int region_cnt, int unit);
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int hns_roce_hem_list_request(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_list *hem_list,
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const struct hns_roce_buf_region *regions,
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int region_cnt);
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void hns_roce_hem_list_release(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_list *hem_list);
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void *hns_roce_hem_list_find_mtt(struct hns_roce_dev *hr_dev,
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struct hns_roce_hem_list *hem_list,
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int offset, int *mtt_cnt, u64 *phy_addr);
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static inline void hns_roce_hem_first(struct hns_roce_hem *hem,
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struct hns_roce_hem_iter *iter)
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{
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iter->hem = hem;
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iter->chunk = list_empty(&hem->chunk_list) ? NULL :
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list_entry(hem->chunk_list.next,
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struct hns_roce_hem_chunk, list);
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iter->page_idx = 0;
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}
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static inline int hns_roce_hem_last(struct hns_roce_hem_iter *iter)
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{
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return !iter->chunk;
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}
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static inline void hns_roce_hem_next(struct hns_roce_hem_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->hem->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 hns_roce_hem_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 hns_roce_hem_addr(struct hns_roce_hem_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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#endif /*_HNS_ROCE_HEM_H*/
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