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From: Eric Biggers <ebiggers@kernel.org>
To: Satya Tangirala <satyat@google.com>
Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
	linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	Barani Muthukumaran <bmuthuku@qti.qualcomm.com>,
	Kuohong Wang <kuohong.wang@mediatek.com>,
	Kim Boojin <boojin.kim@samsung.com>
Subject: Re: [PATCH v6 5/9] scsi: ufs: UFS crypto API
Date: Tue, 14 Jan 2020 13:16:54 -0800
Message-ID: <20200114211653.GD41220@gmail.com> (raw)
In-Reply-To: <20191220044838.GD718@sol.localdomain>

On Thu, Dec 19, 2019 at 08:48:38PM -0800, Eric Biggers wrote:
> On Wed, Dec 18, 2019 at 06:51:32AM -0800, Satya Tangirala wrote:
> > +/**
> > + * ufshcd_hba_init_crypto - Read crypto capabilities, init crypto fields in hba
> > + * @hba: Per adapter instance
> > + *
> > + * Return: 0 if crypto was initialized or is not supported, else a -errno value.
> > + */
> > +int ufshcd_hba_init_crypto(struct ufs_hba *hba)
> > +{
> > +	int cap_idx = 0;
> > +	int err = 0;
> > +	unsigned int crypto_modes_supported[BLK_ENCRYPTION_MODE_MAX];
> > +	enum blk_crypto_mode_num blk_mode_num;
> > +
> > +	/* Default to disabling crypto */
> > +	hba->caps &= ~UFSHCD_CAP_CRYPTO;
> > +
> > +	/* Return 0 if crypto support isn't present */
> > +	if (!(hba->capabilities & MASK_CRYPTO_SUPPORT))
> > +		goto out;
> > +
> 
> Note that unfortunately, this patch doesn't work yet on some UFS host
> controllers that claim to support the UFS standard crypto, due to issues like
> deviations from the UFS standard and missing device tree changes -- and this can
> even cause boot-time crashes.
> 
> So if we can't fix everything right away (which can be really hard without help
> from the relevant vendor) I think we have to define a bit
> UFSHCD_QUIRK_BROKEN_CRYPTO in ufs_hba::quirks which can be set on host
> controllers where the proper tricks to get the crypto working correctly haven't
> been figured out yet.  The crypto support would be ignored if that bit is set.

I included a patch defining UFSHCD_QUIRK_BROKEN_CRYPTO in my RFC patchset that
wires up inline crypto support on Dragonboard 845c:
https://lkml.kernel.org/linux-scsi/20200110061634.46742-4-ebiggers@kernel.org/

Satya, feel free to include that patch in v7 of your patchset.

- Eric

  reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-18 14:51 [PATCH v6 0/9] Inline Encryption Support Satya Tangirala
2019-12-18 14:51 ` [PATCH v6 1/9] block: Keyslot Manager for Inline Encryption Satya Tangirala
2019-12-18 20:13   ` Eric Biggers
2020-01-17  9:10   ` Christoph Hellwig
2019-12-18 14:51 ` [PATCH v6 2/9] block: Add encryption context to struct bio Satya Tangirala
2019-12-18 21:10   ` Eric Biggers
2019-12-18 21:21   ` Darrick J. Wong
2019-12-18 21:25     ` Martin K. Petersen
2019-12-18 22:27       ` Eric Biggers
2019-12-19  0:47         ` Martin K. Petersen
2019-12-20  3:52           ` Eric Biggers
2020-01-07  4:35             ` Martin K. Petersen
2020-01-08 14:07           ` Christoph Hellwig
2020-01-08 17:26             ` Eric Biggers
2020-01-17  8:32               ` Christoph Hellwig
2020-01-18  5:11                 ` Eric Biggers
2020-01-09  3:40             ` Martin K. Petersen
2020-01-14 21:24   ` Eric Biggers
2019-12-18 14:51 ` [PATCH v6 3/9] block: blk-crypto for Inline Encryption Satya Tangirala
2019-12-20  3:14   ` Eric Biggers
2019-12-20  5:10   ` Eric Biggers
2020-01-14 21:22   ` Eric Biggers
2019-12-18 14:51 ` [PATCH v6 4/9] scsi: ufs: UFS driver v2.1 spec crypto additions Satya Tangirala
2020-01-17 12:31   ` Christoph Hellwig
2019-12-18 14:51 ` [PATCH v6 5/9] scsi: ufs: UFS crypto API Satya Tangirala
2019-12-20  4:48   ` Eric Biggers
2020-01-14 21:16     ` Eric Biggers [this message]
2020-01-17 13:51   ` Christoph Hellwig
2019-12-18 14:51 ` [PATCH v6 6/9] scsi: ufs: Add inline encryption support to UFS Satya Tangirala
2019-12-20  5:44   ` Eric Biggers
2020-01-17 13:58   ` Christoph Hellwig
2020-01-18  5:27     ` Eric Biggers
2020-01-18  3:58   ` Eric Biggers
2019-12-18 14:51 ` [PATCH v6 7/9] fscrypt: add inline encryption support Satya Tangirala
2020-01-14 21:12   ` Eric Biggers
2019-12-18 14:51 ` [PATCH v6 8/9] f2fs: " Satya Tangirala
2019-12-20  4:23   ` Eric Biggers
2019-12-18 14:51 ` [PATCH v6 9/9] ext4: " Satya Tangirala
2019-12-19  0:12   ` Eric Biggers
2019-12-19  0:31     ` Satya Tangirala
2019-12-22  0:16   ` Eric Biggers
2020-01-08 14:05 ` [PATCH v6 0/9] Inline Encryption Support Christoph Hellwig
2020-01-08 18:43   ` Satya Tangirala
2020-01-17  8:52     ` Christoph Hellwig

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