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[PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64

Started byLogan Gunthorpe <logang@deltatee.com>
First post2017-06-22 19:00 +0200
Last post2017-06-23 20:00 +0200
Articles 3 — 2 participants

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  [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64 Logan Gunthorpe <logang@deltatee.com> - 2017-06-22 19:00 +0200
    Re: [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using  io{read|write}64 Horia Geantă <horia.geanta@nxp.com> - 2017-06-23 09:00 +0200
      Re: [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using  io{read|write}64 Logan Gunthorpe <logang@deltatee.com> - 2017-06-23 20:00 +0200

#1672844 — [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64

FromLogan Gunthorpe <logang@deltatee.com>
Date2017-06-22 19:00 +0200
Subject[PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64
Message-ID<tVdCA-7lD-63@gated-at.bofh.it>
Now that ioread64 and iowrite64 are always available we don't
need the ugly ifdefs to change their implementation when they
are not.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: "Horia Geantă" <horia.geanta@nxp.com>
Cc: Dan Douglass <dan.douglass@nxp.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
---
 drivers/crypto/caam/regs.h | 29 -----------------------------
 1 file changed, 29 deletions(-)

diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 84d2f838a063..26fc19dd0c39 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -134,7 +134,6 @@ static inline void clrsetbits_32(void __iomem *reg, u32 clear, u32 set)
  *    base + 0x0000 : least-significant 32 bits
  *    base + 0x0004 : most-significant 32 bits
  */
-#ifdef CONFIG_64BIT
 static inline void wr_reg64(void __iomem *reg, u64 data)
 {
 	if (caam_little_end)
@@ -151,34 +150,6 @@ static inline u64 rd_reg64(void __iomem *reg)
 		return ioread64be(reg);
 }
 
-#else /* CONFIG_64BIT */
-static inline void wr_reg64(void __iomem *reg, u64 data)
-{
-#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
-	if (caam_little_end) {
-		wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
-		wr_reg32((u32 __iomem *)(reg), data);
-	} else
-#endif
-	{
-		wr_reg32((u32 __iomem *)(reg), data >> 32);
-		wr_reg32((u32 __iomem *)(reg) + 1, data);
-	}
-}
-
-static inline u64 rd_reg64(void __iomem *reg)
-{
-#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
-	if (caam_little_end)
-		return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
-			(u64)rd_reg32((u32 __iomem *)(reg)));
-	else
-#endif
-		return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
-			(u64)rd_reg32((u32 __iomem *)(reg) + 1));
-}
-#endif /* CONFIG_64BIT  */
-
 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 #ifdef CONFIG_SOC_IMX7D
 #define cpu_to_caam_dma(value) \
-- 
2.11.0

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#1673301 — Re: [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64

FromHoria Geantă <horia.geanta@nxp.com>
Date2017-06-23 09:00 +0200
SubjectRe: [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64
Message-ID<tVqJr-7bI-3@gated-at.bofh.it>
In reply to#1672844
On 6/22/2017 7:49 PM, Logan Gunthorpe wrote:
> Now that ioread64 and iowrite64 are always available we don't
> need the ugly ifdefs to change their implementation when they
> are not.
> 
Thanks Logan.

Note however this is not equivalent - it changes the behaviour, since
CAAM engine on i.MX6S/SL/D/Q platforms is broken in terms of 64-bit
register endianness - see CONFIG_CRYPTO_DEV_FSL_CAAM_IMX usage in code
you are removing.

[Yes, current code has its problems, as it does not differentiate b/w
i.MX platforms with and without the (unofficial) erratum, but this
should be fixed separately.]

Below is the change that would keep current logic - still forcing i.MX
to write CAAM 64-bit registers in BE even if the engine is LE (yes, diff
is doing a poor job).

Horia

diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 84d2f838a063..b893ebb24e65 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -134,50 +134,25 @@ static inline void clrsetbits_32(void __iomem
*reg, u32 clear, u32 set)
  *    base + 0x0000 : least-significant 32 bits
  *    base + 0x0004 : most-significant 32 bits
  */
-#ifdef CONFIG_64BIT
 static inline void wr_reg64(void __iomem *reg, u64 data)
 {
+#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
        if (caam_little_end)
                iowrite64(data, reg);
        else
-               iowrite64be(data, reg);
-}
-
-static inline u64 rd_reg64(void __iomem *reg)
-{
-       if (caam_little_end)
-               return ioread64(reg);
-       else
-               return ioread64be(reg);
-}
-
-#else /* CONFIG_64BIT */
-static inline void wr_reg64(void __iomem *reg, u64 data)
-{
-#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
-       if (caam_little_end) {
-               wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
-               wr_reg32((u32 __iomem *)(reg), data);
-       } else
 #endif
-       {
-               wr_reg32((u32 __iomem *)(reg), data >> 32);
-               wr_reg32((u32 __iomem *)(reg) + 1, data);
-       }
+               iowrite64be(data, reg);
 }

 static inline u64 rd_reg64(void __iomem *reg)
 {
 #ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
        if (caam_little_end)
-               return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
-                       (u64)rd_reg32((u32 __iomem *)(reg)));
+               return ioread64(reg);
        else
 #endif
-               return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
-                       (u64)rd_reg32((u32 __iomem *)(reg) + 1));
+               return ioread64be(reg);
 }
-#endif /* CONFIG_64BIT  */

 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 #ifdef CONFIG_SOC_IMX7D


> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
> Cc: "Horia Geantă" <horia.geanta@nxp.com>
> Cc: Dan Douglass <dan.douglass@nxp.com>
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: "David S. Miller" <davem@davemloft.net>
> ---
>  drivers/crypto/caam/regs.h | 29 -----------------------------
>  1 file changed, 29 deletions(-)
> 
> diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
> index 84d2f838a063..26fc19dd0c39 100644
> --- a/drivers/crypto/caam/regs.h
> +++ b/drivers/crypto/caam/regs.h
> @@ -134,7 +134,6 @@ static inline void clrsetbits_32(void __iomem *reg, u32 clear, u32 set)
>   *    base + 0x0000 : least-significant 32 bits
>   *    base + 0x0004 : most-significant 32 bits
>   */
> -#ifdef CONFIG_64BIT
>  static inline void wr_reg64(void __iomem *reg, u64 data)
>  {
>  	if (caam_little_end)
> @@ -151,34 +150,6 @@ static inline u64 rd_reg64(void __iomem *reg)
>  		return ioread64be(reg);
>  }
>  
> -#else /* CONFIG_64BIT */
> -static inline void wr_reg64(void __iomem *reg, u64 data)
> -{
> -#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
> -	if (caam_little_end) {
> -		wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
> -		wr_reg32((u32 __iomem *)(reg), data);
> -	} else
> -#endif
> -	{
> -		wr_reg32((u32 __iomem *)(reg), data >> 32);
> -		wr_reg32((u32 __iomem *)(reg) + 1, data);
> -	}
> -}
> -
> -static inline u64 rd_reg64(void __iomem *reg)
> -{
> -#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
> -	if (caam_little_end)
> -		return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
> -			(u64)rd_reg32((u32 __iomem *)(reg)));
> -	else
> -#endif
> -		return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
> -			(u64)rd_reg32((u32 __iomem *)(reg) + 1));
> -}
> -#endif /* CONFIG_64BIT  */
> -
>  #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
>  #ifdef CONFIG_SOC_IMX7D
>  #define cpu_to_caam_dma(value) \
>

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#1673732 — Re: [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64

FromLogan Gunthorpe <logang@deltatee.com>
Date2017-06-23 20:00 +0200
SubjectRe: [PATCH 7/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64
Message-ID<tVB29-5e4-11@gated-at.bofh.it>
In reply to#1673301
Thanks Horia.

I'm inclined to just use your patch verbatim. I can set you as author,
but no matter how I do it, I'll need your Signed-off-by.

Logan

On 23/06/17 12:51 AM, Horia Geantă wrote:
> On 6/22/2017 7:49 PM, Logan Gunthorpe wrote:
>> Now that ioread64 and iowrite64 are always available we don't
>> need the ugly ifdefs to change their implementation when they
>> are not.
>>
> Thanks Logan.
> 
> Note however this is not equivalent - it changes the behaviour, since
> CAAM engine on i.MX6S/SL/D/Q platforms is broken in terms of 64-bit
> register endianness - see CONFIG_CRYPTO_DEV_FSL_CAAM_IMX usage in code
> you are removing.
> 
> [Yes, current code has its problems, as it does not differentiate b/w
> i.MX platforms with and without the (unofficial) erratum, but this
> should be fixed separately.]
> 
> Below is the change that would keep current logic - still forcing i.MX
> to write CAAM 64-bit registers in BE even if the engine is LE (yes, diff
> is doing a poor job).
> 
> Horia
> 
> diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
> index 84d2f838a063..b893ebb24e65 100644
> --- a/drivers/crypto/caam/regs.h
> +++ b/drivers/crypto/caam/regs.h
> @@ -134,50 +134,25 @@ static inline void clrsetbits_32(void __iomem
> *reg, u32 clear, u32 set)
>   *    base + 0x0000 : least-significant 32 bits
>   *    base + 0x0004 : most-significant 32 bits
>   */
> -#ifdef CONFIG_64BIT
>  static inline void wr_reg64(void __iomem *reg, u64 data)
>  {
> +#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
>         if (caam_little_end)
>                 iowrite64(data, reg);
>         else
> -               iowrite64be(data, reg);
> -}
> -
> -static inline u64 rd_reg64(void __iomem *reg)
> -{
> -       if (caam_little_end)
> -               return ioread64(reg);
> -       else
> -               return ioread64be(reg);
> -}
> -
> -#else /* CONFIG_64BIT */
> -static inline void wr_reg64(void __iomem *reg, u64 data)
> -{
> -#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
> -       if (caam_little_end) {
> -               wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
> -               wr_reg32((u32 __iomem *)(reg), data);
> -       } else
>  #endif
> -       {
> -               wr_reg32((u32 __iomem *)(reg), data >> 32);
> -               wr_reg32((u32 __iomem *)(reg) + 1, data);
> -       }
> +               iowrite64be(data, reg);
>  }
> 
>  static inline u64 rd_reg64(void __iomem *reg)
>  {
>  #ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
>         if (caam_little_end)
> -               return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
> -                       (u64)rd_reg32((u32 __iomem *)(reg)));
> +               return ioread64(reg);
>         else
>  #endif
> -               return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
> -                       (u64)rd_reg32((u32 __iomem *)(reg) + 1));
> +               return ioread64be(reg);
>  }
> -#endif /* CONFIG_64BIT  */
> 
>  #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
>  #ifdef CONFIG_SOC_IMX7D
> 
> 
>> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
>> Cc: "Horia Geantă" <horia.geanta@nxp.com>
>> Cc: Dan Douglass <dan.douglass@nxp.com>
>> Cc: Herbert Xu <herbert@gondor.apana.org.au>
>> Cc: "David S. Miller" <davem@davemloft.net>
>> ---
>>  drivers/crypto/caam/regs.h | 29 -----------------------------
>>  1 file changed, 29 deletions(-)
>>
>> diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
>> index 84d2f838a063..26fc19dd0c39 100644
>> --- a/drivers/crypto/caam/regs.h
>> +++ b/drivers/crypto/caam/regs.h
>> @@ -134,7 +134,6 @@ static inline void clrsetbits_32(void __iomem *reg, u32 clear, u32 set)
>>   *    base + 0x0000 : least-significant 32 bits
>>   *    base + 0x0004 : most-significant 32 bits
>>   */
>> -#ifdef CONFIG_64BIT
>>  static inline void wr_reg64(void __iomem *reg, u64 data)
>>  {
>>  	if (caam_little_end)
>> @@ -151,34 +150,6 @@ static inline u64 rd_reg64(void __iomem *reg)
>>  		return ioread64be(reg);
>>  }
>>  
>> -#else /* CONFIG_64BIT */
>> -static inline void wr_reg64(void __iomem *reg, u64 data)
>> -{
>> -#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
>> -	if (caam_little_end) {
>> -		wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
>> -		wr_reg32((u32 __iomem *)(reg), data);
>> -	} else
>> -#endif
>> -	{
>> -		wr_reg32((u32 __iomem *)(reg), data >> 32);
>> -		wr_reg32((u32 __iomem *)(reg) + 1, data);
>> -	}
>> -}
>> -
>> -static inline u64 rd_reg64(void __iomem *reg)
>> -{
>> -#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
>> -	if (caam_little_end)
>> -		return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
>> -			(u64)rd_reg32((u32 __iomem *)(reg)));
>> -	else
>> -#endif
>> -		return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
>> -			(u64)rd_reg32((u32 __iomem *)(reg) + 1));
>> -}
>> -#endif /* CONFIG_64BIT  */
>> -
>>  #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
>>  #ifdef CONFIG_SOC_IMX7D
>>  #define cpu_to_caam_dma(value) \
>>

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