mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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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>
30 lines
834 B
C
30 lines
834 B
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/dma-mapping.h>
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#include "hinic3_hwdev.h"
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#include "hinic3_wq.h"
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void hinic3_wq_get_multi_wqebbs(struct hinic3_wq *wq,
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u16 num_wqebbs, u16 *prod_idx,
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struct hinic3_sq_bufdesc **first_part_wqebbs,
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struct hinic3_sq_bufdesc **second_part_wqebbs,
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u16 *first_part_wqebbs_num)
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{
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u32 idx, remaining;
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idx = wq->prod_idx & wq->idx_mask;
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wq->prod_idx += num_wqebbs;
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*prod_idx = idx;
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*first_part_wqebbs = get_q_element(&wq->qpages, idx, &remaining);
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if (likely(remaining >= num_wqebbs)) {
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*first_part_wqebbs_num = num_wqebbs;
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*second_part_wqebbs = NULL;
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} else {
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*first_part_wqebbs_num = remaining;
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idx += remaining;
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*second_part_wqebbs = get_q_element(&wq->qpages, idx, NULL);
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}
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}
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