linux-kernel - Re: [PATCH] mmc: cqhci: introduce get_trans_desc

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Date:   Mon, 24 May 2021 16:10:47 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Yue Hu <zbestahu@...il.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Harjani Ritesh <riteshh@...eaurora.org>,
        Asutosh Das <asutoshd@...eaurora.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Yue Hu <huyue2@...ong.com>, zbestahu@....com
Subject: Re: [PATCH] mmc: cqhci: introduce get_trans_desc_offset()

On Fri, 21 May 2021 at 05:44, Yue Hu <zbestahu@...il.com> wrote:
>
> From: Yue Hu <huyue2@...ong.com>
>
> The same calculation to get transfer descriptor offset is already used
> at 3 different locations. Let's create a new helper to simplify code.
>
> Signed-off-by: Yue Hu <huyue2@...ong.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/cqhci-core.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c
> index c237b6e..1128dd5 100644
> --- a/drivers/mmc/host/cqhci-core.c
> +++ b/drivers/mmc/host/cqhci-core.c
> @@ -45,17 +45,23 @@ static inline u8 *get_link_desc(struct cqhci_host *cq_host, u8 tag)
>         return desc + cq_host->task_desc_len;
>  }
>
> +static inline size_t get_trans_desc_offset(struct cqhci_host *cq_host, u8 tag)
> +{
> +       return cq_host->trans_desc_len * cq_host->mmc->max_segs * tag;
> +}
> +
>  static inline dma_addr_t get_trans_desc_dma(struct cqhci_host *cq_host, u8 tag)
>  {
> -       return cq_host->trans_desc_dma_base +
> -               (cq_host->mmc->max_segs * tag *
> -                cq_host->trans_desc_len);
> +       size_t offset = get_trans_desc_offset(cq_host, tag);
> +
> +       return cq_host->trans_desc_dma_base + offset;
>  }
>
>  static inline u8 *get_trans_desc(struct cqhci_host *cq_host, u8 tag)
>  {
> -       return cq_host->trans_desc_base +
> -               (cq_host->trans_desc_len * cq_host->mmc->max_segs * tag);
> +       size_t offset = get_trans_desc_offset(cq_host, tag);
> +
> +       return cq_host->trans_desc_base + offset;
>  }
>
>  static void setup_trans_desc(struct cqhci_host *cq_host, u8 tag)
> @@ -194,8 +200,7 @@ static int cqhci_host_alloc_tdl(struct cqhci_host *cq_host)
>
>         cq_host->desc_size = cq_host->slot_sz * cq_host->num_slots;
>
> -       cq_host->data_size = cq_host->trans_desc_len * cq_host->mmc->max_segs *
> -               cq_host->mmc->cqe_qdepth;
> +       cq_host->data_size = get_trans_desc_offset(cq_host, cq_host->mmc->cqe_qdepth);
>
>         pr_debug("%s: cqhci: desc_size: %zu data_sz: %zu slot-sz: %d\n",
>                  mmc_hostname(cq_host->mmc), cq_host->desc_size, cq_host->data_size,
> --
> 1.9.1
>