mirror of https://gitee.com/openkylin/linux.git
251 lines
6.4 KiB
C
251 lines
6.4 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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#include <linux/platform_device.h>
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#include <linux/vmalloc.h>
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#include "hns_roce_device.h"
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int hns_roce_bitmap_alloc(struct hns_roce_bitmap *bitmap, unsigned long *obj)
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{
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int ret = 0;
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spin_lock(&bitmap->lock);
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*obj = find_next_zero_bit(bitmap->table, bitmap->max, bitmap->last);
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if (*obj >= bitmap->max) {
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bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top)
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& bitmap->mask;
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*obj = find_first_zero_bit(bitmap->table, bitmap->max);
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}
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if (*obj < bitmap->max) {
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set_bit(*obj, bitmap->table);
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bitmap->last = (*obj + 1);
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if (bitmap->last == bitmap->max)
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bitmap->last = 0;
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*obj |= bitmap->top;
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} else {
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ret = -1;
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}
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spin_unlock(&bitmap->lock);
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return ret;
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}
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void hns_roce_bitmap_free(struct hns_roce_bitmap *bitmap, unsigned long obj,
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int rr)
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{
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hns_roce_bitmap_free_range(bitmap, obj, 1, rr);
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}
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EXPORT_SYMBOL_GPL(hns_roce_bitmap_free);
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int hns_roce_bitmap_alloc_range(struct hns_roce_bitmap *bitmap, int cnt,
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int align, unsigned long *obj)
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{
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int ret = 0;
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int i;
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if (likely(cnt == 1 && align == 1))
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return hns_roce_bitmap_alloc(bitmap, obj);
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spin_lock(&bitmap->lock);
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*obj = bitmap_find_next_zero_area(bitmap->table, bitmap->max,
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bitmap->last, cnt, align - 1);
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if (*obj >= bitmap->max) {
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bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top)
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& bitmap->mask;
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*obj = bitmap_find_next_zero_area(bitmap->table, bitmap->max, 0,
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cnt, align - 1);
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}
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if (*obj < bitmap->max) {
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for (i = 0; i < cnt; i++)
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set_bit(*obj + i, bitmap->table);
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if (*obj == bitmap->last) {
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bitmap->last = (*obj + cnt);
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if (bitmap->last >= bitmap->max)
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bitmap->last = 0;
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}
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*obj |= bitmap->top;
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} else {
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ret = -1;
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}
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spin_unlock(&bitmap->lock);
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return ret;
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}
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void hns_roce_bitmap_free_range(struct hns_roce_bitmap *bitmap,
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unsigned long obj, int cnt,
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int rr)
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{
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int i;
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obj &= bitmap->max + bitmap->reserved_top - 1;
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spin_lock(&bitmap->lock);
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for (i = 0; i < cnt; i++)
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clear_bit(obj + i, bitmap->table);
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if (!rr)
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bitmap->last = min(bitmap->last, obj);
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bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top)
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& bitmap->mask;
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spin_unlock(&bitmap->lock);
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}
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int hns_roce_bitmap_init(struct hns_roce_bitmap *bitmap, u32 num, u32 mask,
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u32 reserved_bot, u32 reserved_top)
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{
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u32 i;
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if (num != roundup_pow_of_two(num))
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return -EINVAL;
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bitmap->last = 0;
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bitmap->top = 0;
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bitmap->max = num - reserved_top;
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bitmap->mask = mask;
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bitmap->reserved_top = reserved_top;
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spin_lock_init(&bitmap->lock);
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bitmap->table = kcalloc(BITS_TO_LONGS(bitmap->max), sizeof(long),
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GFP_KERNEL);
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if (!bitmap->table)
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return -ENOMEM;
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for (i = 0; i < reserved_bot; ++i)
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set_bit(i, bitmap->table);
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return 0;
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}
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void hns_roce_bitmap_cleanup(struct hns_roce_bitmap *bitmap)
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{
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kfree(bitmap->table);
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}
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void hns_roce_buf_free(struct hns_roce_dev *hr_dev, u32 size,
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struct hns_roce_buf *buf)
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{
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int i;
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struct device *dev = hr_dev->dev;
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if (buf->nbufs == 1) {
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dma_free_coherent(dev, size, buf->direct.buf, buf->direct.map);
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} else {
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for (i = 0; i < buf->nbufs; ++i)
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if (buf->page_list[i].buf)
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dma_free_coherent(dev, 1 << buf->page_shift,
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buf->page_list[i].buf,
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buf->page_list[i].map);
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kfree(buf->page_list);
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}
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}
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EXPORT_SYMBOL_GPL(hns_roce_buf_free);
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int hns_roce_buf_alloc(struct hns_roce_dev *hr_dev, u32 size, u32 max_direct,
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struct hns_roce_buf *buf, u32 page_shift)
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{
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int i = 0;
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dma_addr_t t;
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struct device *dev = hr_dev->dev;
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u32 page_size = 1 << page_shift;
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u32 order;
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/* SQ/RQ buf lease than one page, SQ + RQ = 8K */
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if (size <= max_direct) {
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buf->nbufs = 1;
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/* Npages calculated by page_size */
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order = get_order(size);
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if (order <= page_shift - PAGE_SHIFT)
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order = 0;
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else
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order -= page_shift - PAGE_SHIFT;
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buf->npages = 1 << order;
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buf->page_shift = page_shift;
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/* MTT PA must be recorded in 4k alignment, t is 4k aligned */
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buf->direct.buf = dma_alloc_coherent(dev, size, &t,
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GFP_KERNEL);
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if (!buf->direct.buf)
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return -ENOMEM;
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buf->direct.map = t;
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while (t & ((1 << buf->page_shift) - 1)) {
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--buf->page_shift;
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buf->npages *= 2;
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}
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} else {
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buf->nbufs = (size + page_size - 1) / page_size;
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buf->npages = buf->nbufs;
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buf->page_shift = page_shift;
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buf->page_list = kcalloc(buf->nbufs, sizeof(*buf->page_list),
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GFP_KERNEL);
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if (!buf->page_list)
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return -ENOMEM;
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for (i = 0; i < buf->nbufs; ++i) {
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buf->page_list[i].buf = dma_alloc_coherent(dev,
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page_size,
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&t,
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GFP_KERNEL);
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if (!buf->page_list[i].buf)
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goto err_free;
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buf->page_list[i].map = t;
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}
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}
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return 0;
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err_free:
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hns_roce_buf_free(hr_dev, size, buf);
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return -ENOMEM;
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}
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void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
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{
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if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SRQ)
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hns_roce_cleanup_srq_table(hr_dev);
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hns_roce_cleanup_qp_table(hr_dev);
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hns_roce_cleanup_cq_table(hr_dev);
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hns_roce_cleanup_mr_table(hr_dev);
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hns_roce_cleanup_pd_table(hr_dev);
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hns_roce_cleanup_uar_table(hr_dev);
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}
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