netdev - Re: [PATCH net-next v2 04/17] soc: fsl: qe: add cpm_muram_free

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Date:   Tue, 19 Jan 2021 12:46:00 -0600
From:   Li Yang <leoyang.li@....com>
To:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Cc:     Netdev <netdev@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Zhao Qiang <qiang.zhao@....com>, Andrew Lunn <andrew@...n.ch>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Jakub Kicinski <kuba@...nel.org>,
        Joakim Tjernlund <Joakim.Tjernlund@...inera.com>
Subject: Re: [PATCH net-next v2 04/17] soc: fsl: qe: add cpm_muram_free_addr() helper

On Tue, Jan 19, 2021 at 9:21 AM Rasmus Villemoes
<rasmus.villemoes@...vas.dk> wrote:
>
> Add a helper that takes a virtual address rather than the muram
> offset. This will be used in a couple of places to avoid having to
> store both the offset and the virtual address, as well as removing
> NULL checks from the callers.
>
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>

Acked-by: Li Yang <leoyang.li@....com>

> ---
>  drivers/soc/fsl/qe/qe_common.c | 12 ++++++++++++
>  include/soc/fsl/qe/qe.h        |  5 +++++
>  2 files changed, 17 insertions(+)
>
> diff --git a/drivers/soc/fsl/qe/qe_common.c b/drivers/soc/fsl/qe/qe_common.c
> index 303cc2f5eb4a..448ef7f5321a 100644
> --- a/drivers/soc/fsl/qe/qe_common.c
> +++ b/drivers/soc/fsl/qe/qe_common.c
> @@ -238,3 +238,15 @@ dma_addr_t cpm_muram_dma(void __iomem *addr)
>         return muram_pbase + (addr - muram_vbase);
>  }
>  EXPORT_SYMBOL(cpm_muram_dma);
> +
> +/*
> + * As cpm_muram_free, but takes the virtual address rather than the
> + * muram offset.
> + */
> +void cpm_muram_free_addr(const void __iomem *addr)
> +{
> +       if (!addr)
> +               return;
> +       cpm_muram_free(cpm_muram_offset(addr));
> +}
> +EXPORT_SYMBOL(cpm_muram_free_addr);
> diff --git a/include/soc/fsl/qe/qe.h b/include/soc/fsl/qe/qe.h
> index 8ee3747433c0..66f1afc393d1 100644
> --- a/include/soc/fsl/qe/qe.h
> +++ b/include/soc/fsl/qe/qe.h
> @@ -104,6 +104,7 @@ s32 cpm_muram_alloc_fixed(unsigned long offset, unsigned long size);
>  void __iomem *cpm_muram_addr(unsigned long offset);
>  unsigned long cpm_muram_offset(const void __iomem *addr);
>  dma_addr_t cpm_muram_dma(void __iomem *addr);
> +void cpm_muram_free_addr(const void __iomem *addr);
>  #else
>  static inline s32 cpm_muram_alloc(unsigned long size,
>                                   unsigned long align)
> @@ -135,6 +136,9 @@ static inline dma_addr_t cpm_muram_dma(void __iomem *addr)
>  {
>         return 0;
>  }
> +static inline void cpm_muram_free_addr(const void __iomem *addr)
> +{
> +}
>  #endif /* defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) */
>
>  /* QE PIO */
> @@ -239,6 +243,7 @@ static inline int qe_alive_during_sleep(void)
>  #define qe_muram_addr cpm_muram_addr
>  #define qe_muram_offset cpm_muram_offset
>  #define qe_muram_dma cpm_muram_dma
> +#define qe_muram_free_addr cpm_muram_free_addr
>
>  #ifdef CONFIG_PPC32
>  #define qe_iowrite8(val, addr)     out_8(addr, val)
> --
> 2.23.0
>