[PATCH v11 08/12] scsi: ufs: Add inline encryption support to UFS

Satya Tangirala
2020-04-29T07:21:47Z

Wire up ufshcd.c with the UFS Crypto API, the block layer inline
encryption additions and the keyslot manager.

Signed-off-by: Satya Tangirala <satyat@google.com>
---
drivers/scsi/ufs/ufshcd-crypto.h | 18 +++++++++++++
drivers/scsi/ufs/ufshcd.c | 44 ++++++++++++++++++++++++++++----
drivers/scsi/ufs/ufshcd.h | 6 +++++
3 files changed, 63 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd-crypto.h b/drivers/scsi/ufs/ufshcd-crypto.h
index 22677619de595..9578edb63e7b4 100644
--- a/drivers/scsi/ufs/ufshcd-crypto.h
+++ b/drivers/scsi/ufs/ufshcd-crypto.h
@@ -10,6 +10,20 @@
#include "ufshcd.h"
#include "ufshci.h"

+static inline void ufshcd_prepare_lrbp_crypto(struct ufs_hba *hba,
+ struct scsi_cmnd *cmd,
+ struct ufshcd_lrb *lrbp)
+{
+ struct request *rq = cmd->request;
+
+ if (rq->crypt_keyslot) {
+ lrbp->crypto_key_slot = blk_ksm_get_slot_idx(rq->crypt_keyslot);
+ lrbp->data_unit_num = rq->crypt_ctx->bc_dun[0];
+ } else {
+ lrbp->crypto_key_slot = -1;
+ }
+}
+
bool ufshcd_crypto_enable(struct ufs_hba *hba);

int ufshcd_hba_init_crypto(struct ufs_hba *hba);
@@ -21,6 +35,10 @@ void ufshcd_crypto_destroy_keyslot_manager(struct ufs_hba *hba);

#else /* CONFIG_SCSI_UFS_CRYPTO */

+static inline void ufshcd_prepare_lrbp_crypto(struct ufs_hba *hba,
+ struct scsi_cmnd *cmd,
+ struct ufshcd_lrb *lrbp) { }
+
static inline bool ufshcd_crypto_enable(struct ufs_hba *hba)
{
return false;
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 2435c600cb2d9..041c0dd09ba5d 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -48,6 +48,7 @@
#include "unipro.h"
#include "ufs-sysfs.h"
#include "ufs_bsg.h"
+#include "ufshcd-crypto.h"

#define CREATE_TRACE_POINTS
#include <trace/events/ufs.h>
@@ -812,7 +813,12 @@ static void ufshcd_enable_run_stop_reg(struct ufs_hba *hba)
*/
static inline void ufshcd_hba_start(struct ufs_hba *hba)
{
- ufshcd_writel(hba, CONTROLLER_ENABLE, REG_CONTROLLER_ENABLE);
+ u32 val = CONTROLLER_ENABLE;
+
+ if (ufshcd_crypto_enable(hba))
+ val |= CRYPTO_GENERAL_ENABLE;
+
+ ufshcd_writel(hba, val, REG_CONTROLLER_ENABLE);
}

/**
@@ -2220,6 +2226,8 @@ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp,
struct utp_transfer_req_desc *req_desc = lrbp->utr_descriptor_ptr;
u32 data_direction;
u32 dword_0;
+ u32 dword_1 = 0;
+ u32 dword_3 = 0;

if (cmd_dir == DMA_FROM_DEVICE) {
data_direction = UTP_DEVICE_TO_HOST;
@@ -2238,9 +2246,17 @@ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp,
dword_0 |= UTP_REQ_DESC_INT_CMD;

/* Transfer request descriptor header fields */
+#ifdef CONFIG_SCSI_UFS_CRYPTO
+ if (lrbp->crypto_key_slot >= 0) {
+ dword_0 |= UTP_REQ_DESC_CRYPTO_ENABLE_CMD;
+ dword_0 |= lrbp->crypto_key_slot;
+ dword_1 = lower_32_bits(lrbp->data_unit_num);
+ dword_3 = upper_32_bits(lrbp->data_unit_num);
+ }
+#endif /* CONFIG_SCSI_UFS_CRYPTO */
+
req_desc->header.dword_0 = cpu_to_le32(dword_0);
- /* dword_1 is reserved, hence it is set to 0 */
- req_desc->header.dword_1 = 0;
+ req_desc->header.dword_1 = cpu_to_le32(dword_1);
/*
* assigning invalid value for command status. Controller
* updates OCS on command completion, with the command
@@ -2248,8 +2264,7 @@ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp,
*/
req_desc->header.dword_2 =
cpu_to_le32(OCS_INVALID_COMMAND_STATUS);
- /* dword_3 is reserved, hence it is set to 0 */
- req_desc->header.dword_3 = 0;
+ req_desc->header.dword_3 = cpu_to_le32(dword_3);

req_desc->prd_table_length = 0;
}
@@ -2504,6 +2519,9 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
lrbp->task_tag = tag;
lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun);
lrbp->intr_cmd = !ufshcd_is_intr_aggr_allowed(hba) ? true : false;
+
+ ufshcd_prepare_lrbp_crypto(hba, cmd, lrbp);
+
lrbp->req_abort_skip = false;

ufshcd_comp_scsi_upiu(hba, lrbp);
@@ -2537,6 +2555,9 @@ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba,
lrbp->task_tag = tag;
lrbp->lun = 0; /* device management cmd is not specific to any LUN */
lrbp->intr_cmd = true; /* No interrupt aggregation */
+#ifdef CONFIG_SCSI_UFS_CRYPTO
+ lrbp->crypto_key_slot = -1; /* No crypto operations */
+#endif
hba->dev_cmd.type = cmd_type;

return ufshcd_comp_devman_upiu(hba, lrbp);
@@ -4625,6 +4646,8 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
if (ufshcd_is_rpm_autosuspend_allowed(hba))
sdev->rpm_autosuspend = 1;

+ ufshcd_crypto_setup_rq_keyslot_manager(hba, q);
+
return 0;
}

@@ -5905,6 +5928,9 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
lrbp->task_tag = tag;
lrbp->lun = 0;
lrbp->intr_cmd = true;
+#ifdef CONFIG_SCSI_UFS_CRYPTO
+ lrbp->crypto_key_slot = -1; /* No crypto operations */
+#endif
hba->dev_cmd.type = cmd_type;

switch (hba->ufs_version) {
@@ -8331,6 +8357,7 @@ EXPORT_SYMBOL_GPL(ufshcd_remove);
*/
void ufshcd_dealloc_host(struct ufs_hba *hba)
{
+ ufshcd_crypto_destroy_keyslot_manager(hba);
scsi_host_put(hba->host);
}
EXPORT_SYMBOL_GPL(ufshcd_dealloc_host);
@@ -8541,6 +8568,13 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
/* Reset the attached device */
ufshcd_vops_device_reset(hba);

+ /* Init crypto */
+ err = ufshcd_hba_init_crypto(hba);
+ if (err) {
+ dev_err(hba->dev, "crypto setup failed\n");
+ goto out_remove_scsi_host;
+ }
+
/* Host controller enable */
err = ufshcd_hba_enable(hba);
if (err) {
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index e8f3127276abc..8de208b74f95f 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -183,6 +183,8 @@ struct ufs_pm_lvl_states {
* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
* @issue_time_stamp: time stamp for debug purposes
* @compl_time_stamp: time stamp for statistics
+ * @crypto_key_slot: the key slot to use for inline crypto (-1 if none)
+ * @data_unit_num: the data unit number for the first block for inline crypto
* @req_abort_skip: skip request abort task flag
*/
struct ufshcd_lrb {
@@ -207,6 +209,10 @@ struct ufshcd_lrb {
bool intr_cmd;
ktime_t issue_time_stamp;
ktime_t compl_time_stamp;
+#ifdef CONFIG_SCSI_UFS_CRYPTO
+ int crypto_key_slot;
+ u64 data_unit_num;
+#endif

bool req_abort_skip;
};
--
2.26.2.303.gf8c07b1a785-goog