linux-kernel - Re: [PATCH] dmaengine: fsl-qdma: fixed the source/destination descriptior format

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 26 Apr 2019 17:20:47 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Peng Ma <peng.ma@....com>
Cc:     dan.j.williams@...el.com, leoyang.li@....com,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: fsl-qdma: fixed the source/destination
 descriptior format

On 19-04-19, 08:46, Peng Ma wrote:
> CMD of Source/Destination descriptior format should be lower of

s/descriptior/descriptor

> struct fsl_qdma_engine number data address.
> 
> Signed-off-by: Peng Ma <peng.ma@....com>
> ---
>  drivers/dma/fsl-qdma.c |   29 ++++++++++++++++++-----------
>  1 files changed, 18 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c
> index aa1d0ae..542765a 100644
> --- a/drivers/dma/fsl-qdma.c
> +++ b/drivers/dma/fsl-qdma.c
> @@ -113,6 +113,7 @@
>  /* Field definition for Descriptor offset */
>  #define QDMA_CCDF_STATUS		20
>  #define QDMA_CCDF_OFFSET		20
> +#define QDMA_SDDF_CMD(x)		(((u64)(x)) << 32)
>  
>  /* Field definition for safe loop count*/
>  #define FSL_QDMA_HALT_COUNT		1500
> @@ -214,6 +215,12 @@ struct fsl_qdma_engine {
>  
>  };
>  
> +static inline void
> +qdma_sddf_set_cmd(struct fsl_qdma_format *sddf, u32 val)
> +{
> +	sddf->data = QDMA_SDDF_CMD(val);
> +}
> +
>  static inline u64
>  qdma_ccdf_addr_get64(const struct fsl_qdma_format *ccdf)
>  {
> @@ -341,6 +348,7 @@ static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
>  static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
>  				      dma_addr_t dst, dma_addr_t src, u32 len)
>  {
> +	u32 cmd;
>  	struct fsl_qdma_format *sdf, *ddf;
>  	struct fsl_qdma_format *ccdf, *csgf_desc, *csgf_src, *csgf_dest;
>  
> @@ -353,6 +361,7 @@ static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
>  
>  	memset(fsl_comp->virt_addr, 0, FSL_QDMA_COMMAND_BUFFER_SIZE);
>  	memset(fsl_comp->desc_virt_addr, 0, FSL_QDMA_DESCRIPTOR_BUFFER_SIZE);
> +
>  	/* Head Command Descriptor(Frame Descriptor) */
>  	qdma_desc_addr_set64(ccdf, fsl_comp->bus_addr + 16);
>  	qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
> @@ -369,14 +378,14 @@ static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
>  	/* This entry is the last entry. */
>  	qdma_csgf_set_f(csgf_dest, len);
>  	/* Descriptor Buffer */
> -	sdf->data =
> -		cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
> -			    FSL_QDMA_CMD_RWTTYPE_OFFSET);
> -	ddf->data =
> -		cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
> -			    FSL_QDMA_CMD_RWTTYPE_OFFSET);
> -	ddf->data |=
> -		cpu_to_le64(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
> +	cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
> +			  FSL_QDMA_CMD_RWTTYPE_OFFSET);
> +	qdma_sddf_set_cmd(sdf, cmd);
> +
> +	cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
> +			  FSL_QDMA_CMD_RWTTYPE_OFFSET);
> +	cmd |= cpu_to_le32(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
> +	qdma_sddf_set_cmd(ddf, cmd);
>  }
>  
>  /*
> @@ -701,10 +710,8 @@ static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
>  
>  	intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
>  
> -	if (intr) {
> +	if (intr)
>  		dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
> -		return IRQ_NONE;
> -	}

this seems unrelated can you explain?

>  
>  	qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
>  	return IRQ_HANDLED;
> -- 
> 1.7.1

-- 
~Vinod