diff mbox series

[RFC,v1] scsi: ufs-mediatek: add inline encryption support

Message ID 20200302091138.10341-1-stanley.chu@mediatek.com
State Superseded
Headers show
Series [RFC,v1] scsi: ufs-mediatek: add inline encryption support | expand

Commit Message

Stanley Chu March 2, 2020, 9:11 a.m. UTC
Add inline encryption support to ufs-mediatek.

The standards-compliant parts, such as querying the crypto capabilities
and enabling crypto for individual UFS requests, are already handled by
ufshcd-crypto.c, which itself is wired into the blk-crypto framework.

However MediaTek UFS host requires a vendor-specific hce_enable operation
to allow crypto-related registers being accessed normally in kernel.
After this step, MediaTek UFS host can work as standard-compliant host
for inline-encryption related functions.

This patch is rebased to the latest wip-inline-encryption branch in
Eric Biggers's git:
https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/scsi/ufs/ufs-mediatek.c | 27 ++++++++++++++++++++++++++-
 drivers/scsi/ufs/ufs-mediatek.h |  1 +
 2 files changed, 27 insertions(+), 1 deletion(-)

Comments

Eric Biggers March 2, 2020, 6:02 p.m. UTC | #1
On Mon, Mar 02, 2020 at 05:11:38PM +0800, Stanley Chu wrote:
> Add inline encryption support to ufs-mediatek.
> 
> The standards-compliant parts, such as querying the crypto capabilities
> and enabling crypto for individual UFS requests, are already handled by
> ufshcd-crypto.c, which itself is wired into the blk-crypto framework.
> 
> However MediaTek UFS host requires a vendor-specific hce_enable operation
> to allow crypto-related registers being accessed normally in kernel.
> After this step, MediaTek UFS host can work as standard-compliant host
> for inline-encryption related functions.
> 
> This patch is rebased to the latest wip-inline-encryption branch in
> Eric Biggers's git:
> https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/

Please don't use a random work-in-progress branch from my git repository (which
hasn't been updated to the v7 patchset yet and will be rebased); use instead:

	Repo: https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git
	Tag: inline-encryption-v7

Also, this patch doesn't apply to either branch anyway:

Applying: scsi: ufs-mediatek: add inline encryption support
Using index info to reconstruct a base tree...
error: patch failed: drivers/scsi/ufs/ufs-mediatek.c:15
error: drivers/scsi/ufs/ufs-mediatek.c: patch does not apply
error: patch failed: drivers/scsi/ufs/ufs-mediatek.h:58
error: drivers/scsi/ufs/ufs-mediatek.h: patch does not apply
error: Did you hand edit your patch?

> diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
> index 53eae5fe2ade..12d01fd3d5e1 100644
> --- a/drivers/scsi/ufs/ufs-mediatek.c
> +++ b/drivers/scsi/ufs/ufs-mediatek.c
> @@ -15,6 +15,7 @@
>  #include <linux/soc/mediatek/mtk_sip_svc.h>
>  
>  #include "ufshcd.h"
> +#include "ufshcd-crypto.h"
>  #include "ufshcd-pltfrm.h"
>  #include "ufs_quirks.h"
>  #include "unipro.h"
> @@ -24,6 +25,9 @@
>  	arm_smccc_smc(MTK_SIP_UFS_CONTROL, \
>  		      cmd, val, 0, 0, 0, 0, 0, &(res))
>  
> +#define ufs_mtk_crypto_ctrl(res, enable) \
> +	ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, enable, res)
> +
>  #define ufs_mtk_ref_clk_notify(on, res) \
>  	ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, on, res)
>  
> @@ -66,7 +70,27 @@ static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
>  	}
>  }
>  
> -static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
> +static void ufs_mtk_crypto_enable(struct ufs_hba *hba)
> +{
> +	struct arm_smccc_res res;
> +
> +	ufs_mtk_crypto_ctrl(res, 1);
> +	if (res.a0) {
> +		dev_info(hba->dev, "%s: crypto enable failed, err: %lu\n",
> +			 __func__, res.a0);
> +	}
> +}
> +
> +static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
> +				     enum ufs_notify_change_status status)
> +{
> +	if (status == PRE_CHANGE && ufshcd_hba_is_crypto_supported(hba))
> +		ufs_mtk_crypto_enable(hba);
> +
> +	return 0;
> +}
> +
> +int ufs_mtk_bind_mphy(struct ufs_hba *hba)
>  {
>  	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
>  	struct device *dev = hba->dev;
> @@ -494,6 +518,7 @@ static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
>  	.name                = "mediatek.ufshci",
>  	.init                = ufs_mtk_init,
>  	.setup_clocks        = ufs_mtk_setup_clocks,
> +	.hce_enable_notify   = ufs_mtk_hce_enable_notify,
>  	.link_startup_notify = ufs_mtk_link_startup_notify,
>  	.pwr_change_notify   = ufs_mtk_pwr_change_notify,
>  	.apply_dev_quirks    = ufs_mtk_apply_dev_quirks,
> diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h
> index fccdd979d6fb..5ebaa59898bf 100644
> --- a/drivers/scsi/ufs/ufs-mediatek.h
> +++ b/drivers/scsi/ufs/ufs-mediatek.h
> @@ -58,6 +58,7 @@
>   */
>  #define MTK_SIP_UFS_CONTROL               MTK_SIP_SMC_CMD(0x276)
>  #define UFS_MTK_SIP_DEVICE_RESET          BIT(1)
> +#define UFS_MTK_SIP_CRYPTO_CTRL           BIT(2)
>  #define UFS_MTK_SIP_REF_CLK_NOTIFICATION  BIT(3)

But if this is all that's needed to get inline crypto working with Mediatek UFS,
that's great news.

Thanks!

- Eric
Stanley Chu March 4, 2020, 2:25 a.m. UTC | #2
Hi Eric,

On Mon, 2020-03-02 at 10:02 -0800, Eric Biggers wrote:
> On Mon, Mar 02, 2020 at 05:11:38PM +0800, Stanley Chu wrote:
> > Add inline encryption support to ufs-mediatek.
> > 
> > The standards-compliant parts, such as querying the crypto capabilities
> > and enabling crypto for individual UFS requests, are already handled by
> > ufshcd-crypto.c, which itself is wired into the blk-crypto framework.
> > 
> > However MediaTek UFS host requires a vendor-specific hce_enable operation
> > to allow crypto-related registers being accessed normally in kernel.
> > After this step, MediaTek UFS host can work as standard-compliant host
> > for inline-encryption related functions.
> > 
> > This patch is rebased to the latest wip-inline-encryption branch in
> > Eric Biggers's git:
> > https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/
> 
> Please don't use a random work-in-progress branch from my git repository (which
> hasn't been updated to the v7 patchset yet and will be rebased); use instead:
> 
> 	Repo: https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git
> 	Tag: inline-encryption-v7
> 
> Also, this patch doesn't apply to either branch anyway:
> 
> Applying: scsi: ufs-mediatek: add inline encryption support
> Using index info to reconstruct a base tree...
> error: patch failed: drivers/scsi/ufs/ufs-mediatek.c:15
> error: drivers/scsi/ufs/ufs-mediatek.c: patch does not apply
> error: patch failed: drivers/scsi/ufs/ufs-mediatek.h:58
> error: drivers/scsi/ufs/ufs-mediatek.h: patch does not apply
> error: Did you hand edit your patch?

Sorry for this.
I rebased this patch as RFC v2 to below tag,

	Repo: https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git
 	Tag: inline-encryption-v7


> > diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
> > index 53eae5fe2ade..12d01fd3d5e1 100644
> > --- a/drivers/scsi/ufs/ufs-mediatek.c
> > +++ b/drivers/scsi/ufs/ufs-mediatek.c
> > @@ -15,6 +15,7 @@
> >  #include <linux/soc/mediatek/mtk_sip_svc.h>
> >  
> >  #include "ufshcd.h"
> > +#include "ufshcd-crypto.h"
> >  #include "ufshcd-pltfrm.h"
> >  #include "ufs_quirks.h"
> >  #include "unipro.h"
> > @@ -24,6 +25,9 @@
> >  	arm_smccc_smc(MTK_SIP_UFS_CONTROL, \
> >  		      cmd, val, 0, 0, 0, 0, 0, &(res))
> >  
> > +#define ufs_mtk_crypto_ctrl(res, enable) \
> > +	ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, enable, res)
> > +
> >  #define ufs_mtk_ref_clk_notify(on, res) \
> >  	ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, on, res)
> >  
> > @@ -66,7 +70,27 @@ static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
> >  	}
> >  }
> >  
> > -static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
> > +static void ufs_mtk_crypto_enable(struct ufs_hba *hba)
> > +{
> > +	struct arm_smccc_res res;
> > +
> > +	ufs_mtk_crypto_ctrl(res, 1);
> > +	if (res.a0) {
> > +		dev_info(hba->dev, "%s: crypto enable failed, err: %lu\n",
> > +			 __func__, res.a0);
> > +	}
> > +}
> > +
> > +static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
> > +				     enum ufs_notify_change_status status)
> > +{
> > +	if (status == PRE_CHANGE && ufshcd_hba_is_crypto_supported(hba))
> > +		ufs_mtk_crypto_enable(hba);
> > +
> > +	return 0;
> > +}
> > +
> > +int ufs_mtk_bind_mphy(struct ufs_hba *hba)
> >  {
> >  	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
> >  	struct device *dev = hba->dev;
> > @@ -494,6 +518,7 @@ static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
> >  	.name                = "mediatek.ufshci",
> >  	.init                = ufs_mtk_init,
> >  	.setup_clocks        = ufs_mtk_setup_clocks,
> > +	.hce_enable_notify   = ufs_mtk_hce_enable_notify,
> >  	.link_startup_notify = ufs_mtk_link_startup_notify,
> >  	.pwr_change_notify   = ufs_mtk_pwr_change_notify,
> >  	.apply_dev_quirks    = ufs_mtk_apply_dev_quirks,
> > diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h
> > index fccdd979d6fb..5ebaa59898bf 100644
> > --- a/drivers/scsi/ufs/ufs-mediatek.h
> > +++ b/drivers/scsi/ufs/ufs-mediatek.h
> > @@ -58,6 +58,7 @@
> >   */
> >  #define MTK_SIP_UFS_CONTROL               MTK_SIP_SMC_CMD(0x276)
> >  #define UFS_MTK_SIP_DEVICE_RESET          BIT(1)
> > +#define UFS_MTK_SIP_CRYPTO_CTRL           BIT(2)
> >  #define UFS_MTK_SIP_REF_CLK_NOTIFICATION  BIT(3)
> 
> But if this is all that's needed to get inline crypto working with Mediatek UFS,
> that's great news.

Thanks for your review :)

Stanley Chu



> 
> Thanks!
> 
> - Eric
diff mbox series

Patch

diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index 53eae5fe2ade..12d01fd3d5e1 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -15,6 +15,7 @@ 
 #include <linux/soc/mediatek/mtk_sip_svc.h>
 
 #include "ufshcd.h"
+#include "ufshcd-crypto.h"
 #include "ufshcd-pltfrm.h"
 #include "ufs_quirks.h"
 #include "unipro.h"
@@ -24,6 +25,9 @@ 
 	arm_smccc_smc(MTK_SIP_UFS_CONTROL, \
 		      cmd, val, 0, 0, 0, 0, 0, &(res))
 
+#define ufs_mtk_crypto_ctrl(res, enable) \
+	ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, enable, res)
+
 #define ufs_mtk_ref_clk_notify(on, res) \
 	ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, on, res)
 
@@ -66,7 +70,27 @@  static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
 	}
 }
 
-static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
+static void ufs_mtk_crypto_enable(struct ufs_hba *hba)
+{
+	struct arm_smccc_res res;
+
+	ufs_mtk_crypto_ctrl(res, 1);
+	if (res.a0) {
+		dev_info(hba->dev, "%s: crypto enable failed, err: %lu\n",
+			 __func__, res.a0);
+	}
+}
+
+static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
+				     enum ufs_notify_change_status status)
+{
+	if (status == PRE_CHANGE && ufshcd_hba_is_crypto_supported(hba))
+		ufs_mtk_crypto_enable(hba);
+
+	return 0;
+}
+
+int ufs_mtk_bind_mphy(struct ufs_hba *hba)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
 	struct device *dev = hba->dev;
@@ -494,6 +518,7 @@  static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
 	.name                = "mediatek.ufshci",
 	.init                = ufs_mtk_init,
 	.setup_clocks        = ufs_mtk_setup_clocks,
+	.hce_enable_notify   = ufs_mtk_hce_enable_notify,
 	.link_startup_notify = ufs_mtk_link_startup_notify,
 	.pwr_change_notify   = ufs_mtk_pwr_change_notify,
 	.apply_dev_quirks    = ufs_mtk_apply_dev_quirks,
diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h
index fccdd979d6fb..5ebaa59898bf 100644
--- a/drivers/scsi/ufs/ufs-mediatek.h
+++ b/drivers/scsi/ufs/ufs-mediatek.h
@@ -58,6 +58,7 @@ 
  */
 #define MTK_SIP_UFS_CONTROL               MTK_SIP_SMC_CMD(0x276)
 #define UFS_MTK_SIP_DEVICE_RESET          BIT(1)
+#define UFS_MTK_SIP_CRYPTO_CTRL           BIT(2)
 #define UFS_MTK_SIP_REF_CLK_NOTIFICATION  BIT(3)
 
 /*