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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
#include <linux/device.h>
#include "hinic3_hwdev.h"
#include "hinic3_queue_common.h"
void hinic3_queue_pages_init(struct hinic3_queue_pages *qpages, u32 q_depth,
u32 page_size, u32 elem_size)
{
u32 elem_per_page;
elem_per_page = min(page_size / elem_size, q_depth);
qpages->pages = NULL;
qpages->page_size = page_size;
qpages->num_pages = max(q_depth / elem_per_page, 1);
qpages->elem_size_shift = ilog2(elem_size);
qpages->elem_per_pg_shift = ilog2(elem_per_page);
}
static void __queue_pages_free(struct hinic3_hwdev *hwdev,
struct hinic3_queue_pages *qpages, u32 pg_cnt)
{
while (pg_cnt > 0) {
pg_cnt--;
hinic3_dma_free_coherent_align(hwdev->dev,
qpages->pages + pg_cnt);
}
kfree(qpages->pages);
qpages->pages = NULL;
}
void hinic3_queue_pages_free(struct hinic3_hwdev *hwdev,
struct hinic3_queue_pages *qpages)
{
__queue_pages_free(hwdev, qpages, qpages->num_pages);
}
int hinic3_queue_pages_alloc(struct hinic3_hwdev *hwdev,
struct hinic3_queue_pages *qpages, u32 align)
{
u32 pg_idx;
int err;
qpages->pages = kcalloc(qpages->num_pages, sizeof(qpages->pages[0]),
GFP_KERNEL);
if (!qpages->pages)
return -ENOMEM;
if (align == 0)
align = qpages->page_size;
for (pg_idx = 0; pg_idx < qpages->num_pages; pg_idx++) {
err = hinic3_dma_zalloc_coherent_align(hwdev->dev,
qpages->page_size,
align,
GFP_KERNEL,
qpages->pages + pg_idx);
if (err) {
__queue_pages_free(hwdev, qpages, pg_idx);
return err;
}
}
return 0;
}
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