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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>
53 lines
1.3 KiB
C
53 lines
1.3 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/delay.h>
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#include <linux/dma-mapping.h>
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#include "hinic3_common.h"
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int hinic3_dma_zalloc_coherent_align(struct device *dev, u32 size, u32 align,
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gfp_t flag,
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struct hinic3_dma_addr_align *mem_align)
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{
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dma_addr_t paddr, align_paddr;
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void *vaddr, *align_vaddr;
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u32 real_size = size;
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vaddr = dma_alloc_coherent(dev, real_size, &paddr, flag);
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if (!vaddr)
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return -ENOMEM;
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align_paddr = ALIGN(paddr, align);
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if (align_paddr == paddr) {
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align_vaddr = vaddr;
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goto out;
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}
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dma_free_coherent(dev, real_size, vaddr, paddr);
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/* realloc memory for align */
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real_size = size + align;
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vaddr = dma_alloc_coherent(dev, real_size, &paddr, flag);
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if (!vaddr)
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return -ENOMEM;
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align_paddr = ALIGN(paddr, align);
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align_vaddr = vaddr + (align_paddr - paddr);
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out:
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mem_align->real_size = real_size;
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mem_align->ori_vaddr = vaddr;
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mem_align->ori_paddr = paddr;
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mem_align->align_vaddr = align_vaddr;
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mem_align->align_paddr = align_paddr;
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return 0;
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}
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void hinic3_dma_free_coherent_align(struct device *dev,
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struct hinic3_dma_addr_align *mem_align)
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{
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dma_free_coherent(dev, mem_align->real_size,
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mem_align->ori_vaddr, mem_align->ori_paddr);
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}
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