On 03.02.2021 12:04, Van Leeuwen, Pascal wrote:
-----Original Message-----
From: Maciej Pijanowski <maciej.pijanow...@3mdeb.com>
Sent: Wednesday, February 3, 2021 11:00 AM
To: Van Leeuwen, Pascal <pvanleeu...@rambus.com>; linux-crypto@vger.kernel.org
Cc: aten...@kernel.org; pascalv...@gmail.com; Piotr Król <piotr.k...@3mdeb.com>
Subject: Re: safexcel driver for EIP197 and mini firmware features
<<< External Email >>>
On 02.02.2021 10:15, Maciej Pijanowski wrote:
On 02.02.2021 09:48, Van Leeuwen, Pascal wrote:
Hello Maciej,
Hello,
-----Original Message-----
From: Maciej Pijanowski <maciej.pijanow...@3mdeb.com>
Sent: Monday, February 1, 2021 7:53 PM
To: linux-crypto@vger.kernel.org
Cc: antoine.ten...@bootlin.com; pascalv...@gmail.com; Piotr Król
<piotr.k...@3mdeb.com>
Subject: safexcel driver for EIP197 and mini firmware features
<<< External Email >>>
Hello,
I am interested in using the EIP197 crypto accelerator. I am aware that
it requires an NDA
to obtain the firmware for it, but I found out that there is some kind
of "minifw" as well
in the linux-firmware tree [3]. I found no description of it - I would
like to learn what
are the features and limitations of this "minifw".
Actually, from the perspective of what that firmware normally does,
it does not have any features
at all :-) Ok, except for cache invalidates, which the EIP-197 requires.
It just bypasses everything from the inputs to the internal crypto
engine, effectively turning the
EIP-197 into an EIP-97 with caches & prefetching.
But that's OK for the Linux kernel driver, because that was using the
EIP-197 in EIP-97 backward
compatibility mode anyway. It does not support any advanced EIP-197
firmware features.
So from the perspective of the current Linux driver: no limitations.
Thank you very much for the response. That is much more clear now.
I started with using it on the Debian image from board vendor [2]. The
kernel here is
5.1.0. The firmware is loaded, but the ALG tests are all failing:
[14785.750246] crypto-safexcel f2800000.crypto: firmware:
direct-loading
firmware inside-secure/eip197b/ifpp.bin
[14785.762765] crypto-safexcel f2800000.crypto: firmware:
direct-loading
firmware inside-secure/eip197b/ipue.bin
[14785.777978] alg: skcipher: safexcel-cbc-des encryption test failed
(wrong output IV) on test vector 0, cfg="in-place"
[14785.788661] 00000000: fe dc ba 98 76 54 32 10
[14785.800606] alg: skcipher: safexcel-cbc-des3_ede encryption test
failed (wrong output IV) on test vector 0, cfg="in-place"
[14785.811720] 00000000: 7d 33 88 93 0f 93 b2 42
[14785.823734] alg: skcipher: safexcel-cbc-aes encryption test failed
(wrong output IV) on test vector 0, cfg="in-place"
[14785.834439] 00000000: 3d af ba 42 9d 9e b4 30 b4 22 da 80 2c 9f
ac 41
[14785.884568] alg: hash: safexcel-hmac-sha224 test failed (wrong
result) on test vector 3, cfg="init+update+update+final two even
splits"
[14785.901836] alg: hash: safexcel-hmac-sha256 test failed (wrong
result) on test vector 2, cfg="import/export"
[14785.926693] alg: aead: safexcel-authenc-hmac-sha1-cbc-aes encryption
test failed (wrong result) on test vector 0, cfg="misaligned splits
crossing pages, inplace"
[14785.944430] alg: No test for authenc(hmac(sha224),cbc(aes))
(safexcel-authenc-hmac-sha224-cbc-aes)
[14785.956978] alg: aead: safexcel-authenc-hmac-sha256-cbc-aes
encryption test failed (wrong result) on test vector 0, cfg="two even
aligned splits"
[14785.973472] alg: No test for authenc(hmac(sha384),cbc(aes))
(safexcel-authenc-hmac-sha384-cbc-aes)
[14785.986103] alg: aead: safexcel-authenc-hmac-sha512-cbc-aes
encryption test failed (wrong result) on test vector 0, cfg="two even
aligned splits"
Ok, that is unexpected. Although I know there is one particular
kernel version that was broken.
So you might want to try a slightly newer one.
(I'd love to try 5.1 myself but I don't have access to the hardware
right now, working from home)
I am going to try with 5.10.12 and let you know with the results.
This is the first result with 5.10.12 mainline kernel:
[ 1.678251] mmcblk0rpmb: mmc0:0001 8GTF4R partition 3 512 KiB,
chardev (239:0)
[ 182.882113] random: fast init done
[ 185.308594] crypto-safexcel f2800000.crypto: HW init failed (-11)
[ 185.314737] ------------[ cut here ]------------
[ 185.319379] WARNING: CPU: 2 PID: 1 at kernel/irq/manage.c:1777
free_irq+0x31c/0x350
[ 185.327065] Modules linked in:
[ 185.330134] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.10.12-dirty #1
[ 185.336687] Hardware name: SolidRun ClearFog GT 8K (DT)
[ 185.341934] pstate: 60000085 (nZCv daIf -PAN -UAO -TCO BTYPE=--)
[ 185.347964] pc : free_irq+0x31c/0x350
[ 185.351640] lr : free_irq+0x300/0x350
[ 185.355315] sp : ffff80001160baf0
[ 185.358641] x29: ffff80001160baf0 x28: 0000000000000000
[ 185.363976] x27: ffff8000111d1078 x26: ffff8000111404b8
[ 185.369310] x25: 000000000000002d x24: ffff0001016036dc
[ 185.374644] x23: ffff000101603790 x22: ffff0001015db180
[ 185.379978] x21: 0000000000000000 x20: ffff0001015da700
[ 185.385313] x19: ffff000101603600 x18: 0000000000000010
[ 185.390647] x17: 00000000000000a9 x16: 0000000000000087
[ 185.395981] x15: ffff000100078478 x14: 0000000000000102
[ 185.401316] x13: ffff000100078478 x12: 00000000ffffffea
[ 185.406649] x11: 0000000000000040 x10: ffff8000114322a0
[ 185.411983] x9 : ffff800011432298 x8 : ffff000100400270
[ 185.417318] x7 : 0000000000000000 x6 : 0000000000000000
[ 185.422651] x5 : ffff000100400248 x4 : ffff8000115b0000
[ 185.427985] x3 : ffff8000115b0188 x2 : 0000000000020000
[ 185.433319] x1 : ffff000101603600 x0 : ffff800010c87198
[ 185.438654] Call trace:
[ 185.441109] free_irq+0x31c/0x350
[ 185.444437] devm_irq_release+0x18/0x28
[ 185.448289] release_nodes+0x1b0/0x228
[ 185.452052] devres_release_all+0x38/0x60
[ 185.456077] really_probe+0x1e4/0x3b0
[ 185.459753] driver_probe_device+0x58/0xb8
[ 185.463865] device_driver_attach+0x74/0x80
[ 185.468063] __driver_attach+0x58/0xe0
[ 185.471827] bus_for_each_dev+0x70/0xc8
[ 185.475677] driver_attach+0x24/0x30
[ 185.479265] bus_add_driver+0x14c/0x1f0
[ 185.483116] driver_register+0x64/0x120
[ 185.486965] __platform_driver_register+0x48/0x58
[ 185.491690] safexcel_init+0x48/0x70
[ 185.495279] do_one_initcall+0x54/0x1b8
[ 185.499130] kernel_init_freeable+0x1d4/0x23c
[ 185.503505] kernel_init+0x14/0x118
[ 185.507005] ret_from_fork+0x10/0x34
[ 185.510596] ---[ end trace a5f4f63f649fa735 ]---
[ 185.515370] crypto-safexcel: probe of f2800000.crypto failed with
error -11
[ 185.522632] usbcore: registered new interface driver usbhid
The "HW init failed" comes from here:
https://elixir.bootlin.com/linux/v5.10.12/source/drivers/crypto/inside-secure/safexcel.c#L1692
Interestingly, I cannot see in the driver code (at least at a first
glance) where the (-11)
error code would come from.
Any hints?
It's a weird error code indeed. -11 would be ... EAGAIN? That's certainly not
something local.
So it must be some error code passed on from some Linux kernel API function
call.
My best guess at the moment would be the firmware load call
(firmware_request_nowarn).
But it would have been helpful to see the driver logging _prior_ to HW init
failed, to see
which parts of the initialization _did_ succeed properly.
Do you have a known working kernel version for this driver?
I've seen a lot of kernel versions work just fine in the past.
5.4 - 5.8 should definitely work just fine. Last time I tried was September of
last year,
when I tried to get some fix in for a customer of ours. (but had to give up due
to the patch
not being accepted as such and me not having the time to redo it as suggested)
In any case, whatever was in development (5.10?) at the time still worked fine
on my side.
In any case, I only know of one older kernel version that was truly broken.
Could be the 5.1
you tried, don't remember exactly ...
I will try with one of these suggested versions and maybe add some
logging in the initialization as suggested above. Thanks.
Thank you,
I am going to test it with more recent, mainline kernel as well, but it
would be still nice to learn
a little bit more about this "minifw", it's features, and what could be
possibly achieved on this
board without proprietary (and behind NDA) crypto firmware.
Everything the kernel driver currently supports.
The real firmware is for doing full protocol offload (like IPsec,
DTLS, etc.) which the Linux kernel
does not currently support anyway. (unfortunately, I might add)
Are you aware of any other system (OS) or implementation which takes
advantage of more of the EIP197 features (like the mentioned IPsec
offload)?
Thank you,
[1]
https://www.solid-run.com/embedded-networking/marvell-armada-family/clearfog-gt-8k/
[2] https://images.solid-build.xyz/8040/Debian/
[3]
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/inside-
secure/eip197_minifw/ifpp.bin?id=eefb5f7410150c00d0ab5c41c5d817ae9bf449b3
--
Maciej Pijanowski
Embedded Systems Engineer
GPG: 9963C36AAC3B2B46
https://3mdeb.com | @3mdeb_com
Regards,
Pascal van Leeuwen
Silicon IP Architect Multi-Protocol Engines, Rambus Security
Rambus ROTW Holding BV
+31-73 6581953
Note: The Inside Secure/Verimatrix Silicon IP team was recently
acquired by Rambus.
Please be so kind to update your e-mail address book with my new
e-mail address.
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--
Maciej Pijanowski
Embedded Systems Engineer
GPG: 9963C36AAC3B2B46
https://3mdeb.com | @3mdeb_com
Regards,
Pascal van Leeuwen
Silicon IP Architect Multi-Protocol Engines, Rambus Security
Rambus ROTW Holding BV
+31-73 6581953
Note: The Inside Secure/Verimatrix Silicon IP team was recently acquired by
Rambus.
Please be so kind to update your e-mail address book with my new e-mail address.
** This message and any attachments are for the sole use of the intended
recipient(s). It may contain information that is confidential and privileged.
If you are not the intended recipient of this message, you are prohibited from
printing, copying, forwarding or saving it. Please delete the message and
attachments and notify the sender immediately. **
Rambus Inc.<http://www.rambus.com>
--
Maciej Pijanowski
Embedded Systems Engineer
GPG: 9963C36AAC3B2B46
https://3mdeb.com | @3mdeb_com
