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