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scsi: ufs-mediatek: Add inline encryption support

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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.

Link: https://lore.kernel.org/r/20200712003226.7593-1-stanley.chu@mediatek.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu 2020-07-12 08:32:26 +08:00 committed by Martin K. Petersen
parent 30f259b488
commit 46426552e7
2 changed files with 23 additions and 0 deletions
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22
drivers/scsi/ufs/ufs-mediatek.c
View File

@ -16,6 +16,7 @@
#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"
@ -25,6 +26,9 @@
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)
@ -73,6 +77,18 @@ static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
}
}
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);
hba->caps &= ~UFSHCD_CAP_CRYPTO;
}
}
static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
@ -83,6 +99,9 @@ static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
hba->vps->hba_enable_delay_us = 0;
else
hba->vps->hba_enable_delay_us = 600;
if (hba->caps & UFSHCD_CAP_CRYPTO)
ufs_mtk_crypto_enable(hba);
}
return 0;
@ -317,6 +336,9 @@ static int ufs_mtk_init(struct ufs_hba *hba)
/* Enable clock-gating */
hba->caps |= UFSHCD_CAP_CLK_GATING;
/* Enable inline encryption */
hba->caps |= UFSHCD_CAP_CRYPTO;
/* Enable WriteBooster */
hba->caps |= UFSHCD_CAP_WB_EN;
hba->vps->wb_flush_threshold = UFS_WB_BUF_REMAIN_PERCENT(80);

1
drivers/scsi/ufs/ufs-mediatek.h
View File

@ -70,6 +70,7 @@ enum {
*/
#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)
/*