1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright 2019 Google LLC
4 */
5
6 #ifndef _UFSHCD_CRYPTO_H
7 #define _UFSHCD_CRYPTO_H
8
9 #ifdef CONFIG_SCSI_UFS_CRYPTO
10 #include "ufshcd.h"
11 #include "ufshci.h"
12
ufshcd_prepare_lrbp_crypto(struct request * rq,struct ufshcd_lrb * lrbp)13 static inline void ufshcd_prepare_lrbp_crypto(struct request *rq,
14 struct ufshcd_lrb *lrbp)
15 {
16 if (!rq || !rq->crypt_keyslot) {
17 lrbp->crypto_key_slot = -1;
18 return;
19 }
20
21 lrbp->crypto_key_slot = blk_ksm_get_slot_idx(rq->crypt_keyslot);
22 lrbp->data_unit_num = rq->crypt_ctx->bc_dun[0];
23 }
24
25 static inline void
ufshcd_prepare_req_desc_hdr_crypto(struct ufshcd_lrb * lrbp,u32 * dword_0,u32 * dword_1,u32 * dword_3)26 ufshcd_prepare_req_desc_hdr_crypto(struct ufshcd_lrb *lrbp, u32 *dword_0,
27 u32 *dword_1, u32 *dword_3)
28 {
29 if (lrbp->crypto_key_slot >= 0) {
30 *dword_0 |= UTP_REQ_DESC_CRYPTO_ENABLE_CMD;
31 *dword_0 |= lrbp->crypto_key_slot;
32 *dword_1 = lower_32_bits(lrbp->data_unit_num);
33 *dword_3 = upper_32_bits(lrbp->data_unit_num);
34 }
35 }
36
ufshcd_crypto_clear_prdt(struct ufs_hba * hba,struct ufshcd_lrb * lrbp)37 static inline void ufshcd_crypto_clear_prdt(struct ufs_hba *hba,
38 struct ufshcd_lrb *lrbp)
39 {
40 if (!(hba->quirks & UFSHCD_QUIRK_KEYS_IN_PRDT))
41 return;
42
43 if (!lrbp->cmd->request->crypt_ctx)
44 return;
45
46 memzero_explicit(lrbp->ucd_prdt_ptr,
47 hba->sg_entry_size * scsi_sg_count(lrbp->cmd));
48 }
49
50 bool ufshcd_crypto_enable(struct ufs_hba *hba);
51
52 int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba);
53
54 void ufshcd_init_crypto(struct ufs_hba *hba);
55
56 void ufshcd_crypto_setup_rq_keyslot_manager(struct ufs_hba *hba,
57 struct request_queue *q);
58
59 #else /* CONFIG_SCSI_UFS_CRYPTO */
60
ufshcd_prepare_lrbp_crypto(struct request * rq,struct ufshcd_lrb * lrbp)61 static inline void ufshcd_prepare_lrbp_crypto(struct request *rq,
62 struct ufshcd_lrb *lrbp) { }
63
64 static inline void
ufshcd_prepare_req_desc_hdr_crypto(struct ufshcd_lrb * lrbp,u32 * dword_0,u32 * dword_1,u32 * dword_3)65 ufshcd_prepare_req_desc_hdr_crypto(struct ufshcd_lrb *lrbp, u32 *dword_0,
66 u32 *dword_1, u32 *dword_3) { }
67
ufshcd_crypto_clear_prdt(struct ufs_hba * hba,struct ufshcd_lrb * lrbp)68 static inline void ufshcd_crypto_clear_prdt(struct ufs_hba *hba,
69 struct ufshcd_lrb *lrbp) { }
70
ufshcd_crypto_enable(struct ufs_hba * hba)71 static inline bool ufshcd_crypto_enable(struct ufs_hba *hba)
72 {
73 return false;
74 }
75
ufshcd_hba_init_crypto_capabilities(struct ufs_hba * hba)76 static inline int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba)
77 {
78 return 0;
79 }
80
ufshcd_init_crypto(struct ufs_hba * hba)81 static inline void ufshcd_init_crypto(struct ufs_hba *hba) { }
82
ufshcd_crypto_setup_rq_keyslot_manager(struct ufs_hba * hba,struct request_queue * q)83 static inline void ufshcd_crypto_setup_rq_keyslot_manager(struct ufs_hba *hba,
84 struct request_queue *q) { }
85
86 #endif /* CONFIG_SCSI_UFS_CRYPTO */
87
88 #endif /* _UFSHCD_CRYPTO_H */
89