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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2019 Google LLC
*/
#ifndef _UFSHCD_CRYPTO_H
#define _UFSHCD_CRYPTO_H
#include <scsi/scsi_cmnd.h>
#include <ufs/ufshcd.h>
#include "ufshcd-priv.h"
#include <ufs/ufshci.h>
#ifdef CONFIG_SCSI_UFS_CRYPTO
static inline void ufshcd_prepare_lrbp_crypto(struct request *rq,
struct ufshcd_lrb *lrbp)
{
if (!rq || !rq->crypt_keyslot) {
lrbp->crypto_key_slot = -1;
return;
}
lrbp->crypto_key_slot = blk_crypto_keyslot_index(rq->crypt_keyslot);
lrbp->data_unit_num = rq->crypt_ctx->bc_dun[0];
}
static inline void
ufshcd_prepare_req_desc_hdr_crypto(struct ufshcd_lrb *lrbp,
struct request_desc_header *h)
{
if (lrbp->crypto_key_slot < 0)
return;
h->enable_crypto = 1;
h->cci = lrbp->crypto_key_slot;
h->dunl = cpu_to_le32(lower_32_bits(lrbp->data_unit_num));
h->dunu = cpu_to_le32(upper_32_bits(lrbp->data_unit_num));
}
static inline int ufshcd_crypto_fill_prdt(struct ufs_hba *hba,
struct ufshcd_lrb *lrbp)
{
struct scsi_cmnd *cmd = lrbp->cmd;
const struct bio_crypt_ctx *crypt_ctx = scsi_cmd_to_rq(cmd)->crypt_ctx;
if (crypt_ctx && hba->vops && hba->vops->fill_crypto_prdt)
return hba->vops->fill_crypto_prdt(hba, crypt_ctx,
lrbp->ucd_prdt_ptr,
scsi_sg_count(cmd));
return 0;
}
static inline void ufshcd_crypto_clear_prdt(struct ufs_hba *hba,
struct ufshcd_lrb *lrbp)
{
if (!(hba->quirks & UFSHCD_QUIRK_KEYS_IN_PRDT))
return;
if (!(scsi_cmd_to_rq(lrbp->cmd)->crypt_ctx))
return;
/* Zeroize the PRDT because it can contain cryptographic keys. */
memzero_explicit(lrbp->ucd_prdt_ptr,
ufshcd_sg_entry_size(hba) * scsi_sg_count(lrbp->cmd));
}
bool ufshcd_crypto_enable(struct ufs_hba *hba);
int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba);
void ufshcd_init_crypto(struct ufs_hba *hba);
void ufshcd_crypto_register(struct ufs_hba *hba, struct request_queue *q);
#else /* CONFIG_SCSI_UFS_CRYPTO */
static inline void ufshcd_prepare_lrbp_crypto(struct request *rq,
struct ufshcd_lrb *lrbp) { }
static inline void
ufshcd_prepare_req_desc_hdr_crypto(struct ufshcd_lrb *lrbp,
struct request_desc_header *h) { }
static inline int ufshcd_crypto_fill_prdt(struct ufs_hba *hba,
struct ufshcd_lrb *lrbp)
{
return 0;
}
static inline void ufshcd_crypto_clear_prdt(struct ufs_hba *hba,
struct ufshcd_lrb *lrbp) { }
static inline bool ufshcd_crypto_enable(struct ufs_hba *hba)
{
return false;
}
static inline int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba)
{
return 0;
}
static inline void ufshcd_init_crypto(struct ufs_hba *hba) { }
static inline void ufshcd_crypto_register(struct ufs_hba *hba,
struct request_queue *q) { }
#endif /* CONFIG_SCSI_UFS_CRYPTO */
#endif /* _UFSHCD_CRYPTO_H */
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