linux-kernel - Re: [PATCH] crypto: hisilicon/zip

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Date:   Thu, 19 Nov 2020 16:49:12 +0800
From:   Zhou Wang <wangzhou1@...ilicon.com>
To:     Yang Shen <shenyang39@...wei.com>, <herbert@...dor.apana.org.au>,
        <davem@...emloft.net>
CC:     <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <xuzaibo@...wei.com>
Subject: Re: [PATCH] crypto: hisilicon/zip - add a work_queue for zip irq

On 2020/11/13 17:32, Yang Shen wrote:
> The patch 'irqchip/gic-v3-its: Balance initial LPI affinity across CPUs'
> set the IRQ to an uncentain CPU. If an IRQ is bound to the CPU used by the
> thread which is sending request, the throughput will be just half.
> 
> So allocate a 'work_queue' and set as 'WQ_UNBOUND' to do the back half work
> on some different CPUS.
> 
> Signed-off-by: Yang Shen <shenyang39@...wei.com>
> Reviewed-by: Zaibo Xu <xuzaibo@...wei.com>

Reviewed-by: Zhou Wang <wangzhou1@...ilicon.com>

Thanks,
Zhou

> ---
>  drivers/crypto/hisilicon/zip/zip_main.c | 26 +++++++++++++++++++++++---
>  1 file changed, 23 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/crypto/hisilicon/zip/zip_main.c b/drivers/crypto/hisilicon/zip/zip_main.c
> index 3d1524b..4fb5a32b 100644
> --- a/drivers/crypto/hisilicon/zip/zip_main.c
> +++ b/drivers/crypto/hisilicon/zip/zip_main.c
> @@ -747,6 +747,8 @@ static int hisi_zip_pf_probe_init(struct hisi_zip *hisi_zip)
> 
>  static int hisi_zip_qm_init(struct hisi_qm *qm, struct pci_dev *pdev)
>  {
> +	int ret;
> +
>  	qm->pdev = pdev;
>  	qm->ver = pdev->revision;
>  	qm->algs = "zlib\ngzip";
> @@ -772,7 +774,25 @@ static int hisi_zip_qm_init(struct hisi_qm *qm, struct pci_dev *pdev)
>  		qm->qp_num = HZIP_QUEUE_NUM_V1 - HZIP_PF_DEF_Q_NUM;
>  	}
> 
> -	return hisi_qm_init(qm);
> +	qm->wq = alloc_workqueue("%s", WQ_HIGHPRI | WQ_MEM_RECLAIM |
> +				 WQ_UNBOUND, num_online_cpus(),
> +				 pci_name(qm->pdev));
> +	if (!qm->wq) {
> +		pci_err(qm->pdev, "fail to alloc workqueue\n");
> +		return -ENOMEM;
> +	}
> +
> +	ret = hisi_qm_init(qm);
> +	if (ret)
> +		destroy_workqueue(qm->wq);
> +
> +	return ret;
> +}
> +
> +static void hisi_zip_qm_uninit(struct hisi_qm *qm)
> +{
> +	hisi_qm_uninit(qm);
> +	destroy_workqueue(qm->wq);
>  }
> 
>  static int hisi_zip_probe_init(struct hisi_zip *hisi_zip)
> @@ -854,7 +874,7 @@ static int hisi_zip_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  	hisi_qm_dev_err_uninit(qm);
> 
>  err_qm_uninit:
> -	hisi_qm_uninit(qm);
> +	hisi_zip_qm_uninit(qm);
> 
>  	return ret;
>  }
> @@ -872,7 +892,7 @@ static void hisi_zip_remove(struct pci_dev *pdev)
>  	hisi_zip_debugfs_exit(qm);
>  	hisi_qm_stop(qm, QM_NORMAL);
>  	hisi_qm_dev_err_uninit(qm);
> -	hisi_qm_uninit(qm);
> +	hisi_zip_qm_uninit(qm);
>  }
> 
>  static const struct pci_error_handlers hisi_zip_err_handler = {
> --
> 2.7.4
> 
> .
>