linux-kernel - Re: [PATCH v7 1/2] mmc: cqhci: Add cqhci set_tran

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Message-ID: <63a5d146-9ef7-4a2d-8c9b-619d3e42ea38@intel.com>
Date: Tue, 19 Mar 2024 14:48:01 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: Sergey Khimich <serghox@...il.com>, linux-kernel@...r.kernel.org
Cc: linux-mmc@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>,
 Shawn Lin <shawn.lin@...k-chips.com>, Jyan Chou <jyanchou@...ltek.com>,
 Asutosh Das <quic_asutoshd@...cinc.com>,
 Ritesh Harjani <ritesh.list@...il.com>
Subject: Re: [PATCH v7 1/2] mmc: cqhci: Add cqhci set_tran_desc() callback

On 19/03/24 13:59, Sergey Khimich wrote:
> From: Sergey Khimich <serghox@...il.com>
> 
> There are could be specific limitations for some mmc
> controllers for setting cqhci transfer descriptors.
> So add callback to allow implement driver specific function.
> 
> Signed-off-by: Sergey Khimich <serghox@...il.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/cqhci-core.c | 11 ++++++++---
>  drivers/mmc/host/cqhci.h      |  4 ++++
>  2 files changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c
> index 41e94cd14109..c14d7251d0bb 100644
> --- a/drivers/mmc/host/cqhci-core.c
> +++ b/drivers/mmc/host/cqhci-core.c
> @@ -474,8 +474,8 @@ static int cqhci_dma_map(struct mmc_host *host, struct mmc_request *mrq)
>  	return sg_count;
>  }
>  
> -static void cqhci_set_tran_desc(u8 *desc, dma_addr_t addr, int len, bool end,
> -				bool dma64)
> +void cqhci_set_tran_desc(u8 *desc, dma_addr_t addr, int len, bool end,
> +			 bool dma64)
>  {
>  	__le32 *attr = (__le32 __force *)desc;
>  
> @@ -495,6 +495,7 @@ static void cqhci_set_tran_desc(u8 *desc, dma_addr_t addr, int len, bool end,
>  		dataddr[0] = cpu_to_le32(addr);
>  	}
>  }
> +EXPORT_SYMBOL(cqhci_set_tran_desc);
>  
>  static int cqhci_prep_tran_desc(struct mmc_request *mrq,
>  			       struct cqhci_host *cq_host, int tag)
> @@ -522,7 +523,11 @@ static int cqhci_prep_tran_desc(struct mmc_request *mrq,
>  
>  		if ((i+1) == sg_count)
>  			end = true;
> -		cqhci_set_tran_desc(desc, addr, len, end, dma64);
> +		if (cq_host->ops->set_tran_desc)
> +			cq_host->ops->set_tran_desc(cq_host, &desc, addr, len, end, dma64);
> +		else
> +			cqhci_set_tran_desc(desc, addr, len, end, dma64);
> +
>  		desc += cq_host->trans_desc_len;
>  	}
>  
> diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h
> index 1a12e40a02e6..fab9d74445ba 100644
> --- a/drivers/mmc/host/cqhci.h
> +++ b/drivers/mmc/host/cqhci.h
> @@ -293,6 +293,9 @@ struct cqhci_host_ops {
>  	int (*program_key)(struct cqhci_host *cq_host,
>  			   const union cqhci_crypto_cfg_entry *cfg, int slot);
>  #endif
> +	void (*set_tran_desc)(struct cqhci_host *cq_host, u8 **desc,
> +			      dma_addr_t addr, int len, bool end, bool dma64);
> +
>  };
>  
>  static inline void cqhci_writel(struct cqhci_host *host, u32 val, int reg)
> @@ -318,6 +321,7 @@ irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error,
>  int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc, bool dma64);
>  struct cqhci_host *cqhci_pltfm_init(struct platform_device *pdev);
>  int cqhci_deactivate(struct mmc_host *mmc);
> +void cqhci_set_tran_desc(u8 *desc, dma_addr_t addr, int len, bool end, bool dma64);
>  static inline int cqhci_suspend(struct mmc_host *mmc)
>  {
>  	return cqhci_deactivate(mmc);