Re: [linux-sunxi] [PATCH v2 1/4] crypto: Add Allwinner Security System crypto accelerator

[Chen-Yu Tsai]

Hi,

On Mon, Jun 9, 2014 at 6:59 PM, LABBE Corentin
<clabbe.montjoie@xxxxxxxxx> wrote:
> Add support for the Security System included in Allwinner SoC A20.
> The Security System is a hardware cryptographic accelerator that support AES/MD5/SHA1/DES/3DES/PRNG algorithms.
>
> Signed-off-by: LABBE Corentin <clabbe.montjoie@xxxxxxxxx>
> ---
>  drivers/crypto/sunxi-ss/Makefile               |  16 ++
>  drivers/crypto/sunxi-ss/sunxi-ss-cipher-3des.c | 118 ++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss-cipher-aes.c  | 130 +++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss-cipher-des.c  | 118 ++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss-cipher.c      | 362 +++++++++++++++++++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss-cipher.h      |   8 +
>  drivers/crypto/sunxi-ss/sunxi-ss-hash-md5.c    |  69 +++++
>  drivers/crypto/sunxi-ss/sunxi-ss-hash-sha1.c   |  69 +++++
>  drivers/crypto/sunxi-ss/sunxi-ss-hash.c        | 228 ++++++++++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss-hash.h        |   9 +
>  drivers/crypto/sunxi-ss/sunxi-ss-rng.c         | 115 ++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss.c             | 190 +++++++++++++
>  drivers/crypto/sunxi-ss/sunxi-ss.h             | 161 +++++++++++
>  13 files changed, 1593 insertions(+)
>  create mode 100644 drivers/crypto/sunxi-ss/Makefile
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-cipher-3des.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-cipher-aes.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-cipher-des.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-cipher.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-cipher.h
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-hash-md5.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-hash-sha1.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-hash.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-hash.h
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss-rng.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss.c
>  create mode 100644 drivers/crypto/sunxi-ss/sunxi-ss.h
>
> diff --git a/drivers/crypto/sunxi-ss/Makefile b/drivers/crypto/sunxi-ss/Makefile
> new file mode 100644
> index 0000000..de4556b
> --- /dev/null
> +++ b/drivers/crypto/sunxi-ss/Makefile
> @@ -0,0 +1,16 @@
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS) += sunxi-ss.o
> +
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS_PRNG) += sunxi-ss-rng.o
> +
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS_DES) += sunxi-ss-des.o
> +sunxi-ss-des-y += sunxi-ss-cipher-des.o sunxi-ss-cipher.o
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS_3DES) += sunxi-ss-3des.o
> +sunxi-ss-3des-y += sunxi-ss-cipher-3des.o sunxi-ss-cipher.o
> +
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS_AES) += sunxi-ss-aes.o
> +sunxi-ss-aes-y += sunxi-ss-cipher-aes.o sunxi-ss-cipher.o

I just tried building Hans' (CC-ed) sunxi-devel branch, which
includes this series, with all the Security System options enabled.

It doesn't build:

  LD      drivers/crypto/sunxi-ss/built-in.o
drivers/crypto/sunxi-ss/sunxi-ss-3des.o: In function `sunxi_cipher_init':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:24:
multiple definition of `sunxi_cipher_init'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:24:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-3des.o: In function `sunxi_des_poll':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:218:
multiple definition of `sunxi_des_poll'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:218:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-3des.o: In function `sunxi_aes_poll':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:33:
multiple definition of `sunxi_aes_poll'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:33:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-3des.o: In function `sunxi_cipher_exit':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:29:
multiple definition of `sunxi_cipher_exit'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:29:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-aes.o: In function `sunxi_cipher_init':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:24:
multiple definition of `sunxi_cipher_init'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:24:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-aes.o: In function `sunxi_des_poll':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:218:
multiple definition of `sunxi_des_poll'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:218:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-aes.o: In function `sunxi_aes_poll':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:33:
multiple definition of `sunxi_aes_poll'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:33:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-aes.o: In function `sunxi_cipher_exit':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:29:
multiple definition of `sunxi_cipher_exit'
drivers/crypto/sunxi-ss/sunxi-ss-des.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-cipher.c:29:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-sha1.o: In function `sunxi_hash_init':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:7:
multiple definition of `sunxi_hash_init'
drivers/crypto/sunxi-ss/sunxi-ss-md5.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:7:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-sha1.o: In function `sunxi_hash_finup':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:204:
multiple definition of `sunxi_hash_finup'
drivers/crypto/sunxi-ss/sunxi-ss-md5.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:204:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-sha1.o: In function `sunxi_hash_digest':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:216:
multiple definition of `sunxi_hash_digest'
drivers/crypto/sunxi-ss/sunxi-ss-md5.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:216:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-sha1.o: In function `sunxi_hash_update':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:44:
multiple definition of `sunxi_hash_update'
drivers/crypto/sunxi-ss/sunxi-ss-md5.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:44:
first defined here
drivers/crypto/sunxi-ss/sunxi-ss-sha1.o: In function `sunxi_hash_final':
/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:115:
multiple definition of `sunxi_hash_final'
drivers/crypto/sunxi-ss/sunxi-ss-md5.o:/home/wens/sunxi/linux/drivers/crypto/sunxi-ss/sunxi-ss-hash.c:115:
first defined here
scripts/Makefile.build:397: recipe for target
'drivers/crypto/sunxi-ss/built-in.o' failed
make[3]: *** [drivers/crypto/sunxi-ss/built-in.o] Error 1
scripts/Makefile.build:465: recipe for target 'drivers/crypto/sunxi-ss' failed
make[2]: *** [drivers/crypto/sunxi-ss] Error 2
scripts/Makefile.build:465: recipe for target 'drivers/crypto' failed
make[1]: *** [drivers/crypto] Error 2
Makefile:878: recipe for target 'drivers' failed
make: *** [drivers] Error 2


What's seems to be happening is that sunxi-ss-cipher.c is
being compiled and included multiple times, once for each
different cipher.

So sunxi-ss-cipher-{aes,3des,des}.o all have a copy of
sunxi-ss-cipher.c compiled in. And during the link phase,
the linker finds multiple definitions and fails.

What would probably work is have a common Kconfig option
such as CONFIG_CRYPTO_DEV_SUNXI_SS_CIPHER, have each cipher
Kconfig option select this one, and have this option trigger
the build of the common functions.

> +
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS_MD5) += sunxi-ss-md5.o
> +sunxi-ss-md5-y += sunxi-ss-hash.o sunxi-ss-hash-md5.o
> +obj-$(CONFIG_CRYPTO_DEV_SUNXI_SS_SHA1) += sunxi-ss-sha1.o
> +sunxi-ss-sha1-y += sunxi-ss-hash.o sunxi-ss-hash-sha1.o

Same goes for the hash part. sunxi-ss-hash.c included twice,
once for md5 and once for sha1.

[snip]

Note that I only tried statically linked builds, not modules.


Cheers
ChenYu
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