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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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17fcb3dc12
This is [1/3] part of hinic3 Ethernet driver initial submission. With this patch hinic3 is a valid kernel module but non-functional driver. The driver parts contained in this patch: Module initialization. PCI driver registration but with empty id_table. Auxiliary driver registration. Net device_ops registration but open/stop are empty stubs. tx/rx logic. All major data structures of the driver are fully introduced with the code that uses them but without their initialization code that requires management interface with the hw. Co-developed-by: Xin Guo <guoxin09@huawei.com> Signed-off-by: Xin Guo <guoxin09@huawei.com> Signed-off-by: Fan Gong <gongfan1@huawei.com> Co-developed-by: Gur Stavi <gur.stavi@huawei.com> Signed-off-by: Gur Stavi <gur.stavi@huawei.com> Link: https://patch.msgid.link/76a137ffdfe115c737c2c224f0c93b60ba53cc16.1747736586.git.gur.stavi@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
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#include <linux/device.h>
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#include "hinic3_hwdev.h"
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#include "hinic3_queue_common.h"
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void hinic3_queue_pages_init(struct hinic3_queue_pages *qpages, u32 q_depth,
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u32 page_size, u32 elem_size)
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{
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u32 elem_per_page;
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elem_per_page = min(page_size / elem_size, q_depth);
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qpages->pages = NULL;
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qpages->page_size = page_size;
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qpages->num_pages = max(q_depth / elem_per_page, 1);
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qpages->elem_size_shift = ilog2(elem_size);
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qpages->elem_per_pg_shift = ilog2(elem_per_page);
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}
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static void __queue_pages_free(struct hinic3_hwdev *hwdev,
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struct hinic3_queue_pages *qpages, u32 pg_cnt)
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{
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while (pg_cnt > 0) {
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pg_cnt--;
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hinic3_dma_free_coherent_align(hwdev->dev,
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qpages->pages + pg_cnt);
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}
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kfree(qpages->pages);
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qpages->pages = NULL;
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}
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void hinic3_queue_pages_free(struct hinic3_hwdev *hwdev,
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struct hinic3_queue_pages *qpages)
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{
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__queue_pages_free(hwdev, qpages, qpages->num_pages);
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}
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int hinic3_queue_pages_alloc(struct hinic3_hwdev *hwdev,
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struct hinic3_queue_pages *qpages, u32 align)
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{
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u32 pg_idx;
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int err;
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qpages->pages = kcalloc(qpages->num_pages, sizeof(qpages->pages[0]),
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GFP_KERNEL);
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if (!qpages->pages)
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return -ENOMEM;
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if (align == 0)
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align = qpages->page_size;
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for (pg_idx = 0; pg_idx < qpages->num_pages; pg_idx++) {
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err = hinic3_dma_zalloc_coherent_align(hwdev->dev,
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qpages->page_size,
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align,
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GFP_KERNEL,
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qpages->pages + pg_idx);
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if (err) {
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__queue_pages_free(hwdev, qpages, pg_idx);
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return err;
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}
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}
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return 0;
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}
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