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-rw-r--r--drivers/crypto/caam/caamalg.c130
-rw-r--r--drivers/crypto/caam/desc_constr.h39
2 files changed, 116 insertions, 53 deletions
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 48fc000d86bf..5f332df1a8e6 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -224,7 +224,7 @@ struct caam_ctx {
};
static void init_sh_desc_key_aead(u32 *desc, struct caam_ctx *ctx,
- int keys_fit_inline, bool is_rfc3686)
+ bool is_rfc3686)
{
u32 *key_jump_cmd;
unsigned int enckeylen = ctx->cdata.keylen;
@@ -244,18 +244,20 @@ static void init_sh_desc_key_aead(u32 *desc, struct caam_ctx *ctx,
if (is_rfc3686)
enckeylen -= CTR_RFC3686_NONCE_SIZE;
- if (keys_fit_inline) {
+ if (ctx->adata.key_inline)
append_key_as_imm(desc, (void *)ctx->adata.key,
ctx->adata.keylen_pad, ctx->adata.keylen,
CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
- append_key_as_imm(desc, (void *)ctx->cdata.key, enckeylen,
- enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
- } else {
+ else
append_key(desc, ctx->adata.key, ctx->adata.keylen, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
+
+ if (ctx->cdata.key_inline)
+ append_key_as_imm(desc, (void *)ctx->cdata.key, enckeylen,
+ enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+ else
append_key(desc, ctx->cdata.key, enckeylen, CLASS_1 |
KEY_DEST_CLASS_REG);
- }
/* Load Counter into CONTEXT1 reg */
if (is_rfc3686) {
@@ -282,13 +284,14 @@ static int aead_null_set_sh_desc(struct crypto_aead *aead)
struct device *jrdev = ctx->jrdev;
u32 *key_jump_cmd, *jump_cmd, *read_move_cmd, *write_move_cmd;
u32 *desc;
+ int rem_bytes = CAAM_DESC_BYTES_MAX - AEAD_DESC_JOB_IO_LEN -
+ ctx->adata.keylen_pad;
/*
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_AEAD_NULL_ENC_LEN + AEAD_DESC_JOB_IO_LEN +
- ctx->adata.keylen_pad <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_AEAD_NULL_ENC_LEN) {
ctx->adata.key_inline = true;
ctx->adata.key = (uintptr_t)ctx->key;
} else {
@@ -368,8 +371,7 @@ static int aead_null_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_AEAD_NULL_DEC_LEN + DESC_JOB_IO_LEN +
- ctx->adata.keylen_pad <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_AEAD_NULL_DEC_LEN) {
ctx->adata.key_inline = true;
ctx->adata.key = (uintptr_t)ctx->key;
} else {
@@ -463,10 +465,11 @@ static int aead_set_sh_desc(struct crypto_aead *aead)
unsigned int ivsize = crypto_aead_ivsize(aead);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
- bool keys_fit_inline;
u32 geniv, moveiv;
u32 ctx1_iv_off = 0;
u32 *desc;
+ u32 inl_mask;
+ unsigned int data_len[2];
const bool ctr_mode = ((ctx->cdata.algtype & OP_ALG_AAI_MASK) ==
OP_ALG_AAI_CTR_MOD128);
const bool is_rfc3686 = alg->caam.rfc3686;
@@ -493,6 +496,9 @@ static int aead_set_sh_desc(struct crypto_aead *aead)
if (is_rfc3686)
ctx1_iv_off = 16 + CTR_RFC3686_NONCE_SIZE;
+ data_len[0] = ctx->adata.keylen_pad;
+ data_len[1] = ctx->cdata.keylen;
+
if (alg->caam.geniv)
goto skip_enc;
@@ -500,24 +506,30 @@ static int aead_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_AEAD_ENC_LEN + AUTHENC_DESC_JOB_IO_LEN +
- ctx->adata.keylen_pad + ctx->cdata.keylen +
- (is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0) <=
- CAAM_DESC_BYTES_MAX) {
- keys_fit_inline = true;
+ if (desc_inline_query(DESC_AEAD_ENC_LEN +
+ (is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0),
+ AUTHENC_DESC_JOB_IO_LEN, data_len, &inl_mask,
+ ARRAY_SIZE(data_len)) < 0)
+ return -EINVAL;
+
+ if (inl_mask & 1)
ctx->adata.key = (uintptr_t)ctx->key;
- ctx->cdata.key = (uintptr_t)(ctx->key + ctx->adata.keylen_pad);
- } else {
- keys_fit_inline = false;
+ else
ctx->adata.key = ctx->key_dma;
+
+ if (inl_mask & 2)
+ ctx->cdata.key = (uintptr_t)(ctx->key + ctx->adata.keylen_pad);
+ else
ctx->cdata.key = ctx->key_dma + ctx->adata.keylen_pad;
- }
+
+ ctx->adata.key_inline = !!(inl_mask & 1);
+ ctx->cdata.key_inline = !!(inl_mask & 2);
/* aead_encrypt shared descriptor */
desc = ctx->sh_desc_enc;
/* Note: Context registers are saved. */
- init_sh_desc_key_aead(desc, ctx, keys_fit_inline, is_rfc3686);
+ init_sh_desc_key_aead(desc, ctx, is_rfc3686);
/* Class 2 operation */
append_operation(desc, ctx->adata.algtype | OP_ALG_AS_INITFINAL |
@@ -572,24 +584,30 @@ skip_enc:
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_AEAD_DEC_LEN + AUTHENC_DESC_JOB_IO_LEN +
- ctx->adata.keylen_pad + ctx->cdata.keylen +
- (is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0) <=
- CAAM_DESC_BYTES_MAX) {
- keys_fit_inline = true;
+ if (desc_inline_query(DESC_AEAD_DEC_LEN +
+ (is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0),
+ AUTHENC_DESC_JOB_IO_LEN, data_len, &inl_mask,
+ ARRAY_SIZE(data_len)) < 0)
+ return -EINVAL;
+
+ if (inl_mask & 1)
ctx->adata.key = (uintptr_t)ctx->key;
- ctx->cdata.key = (uintptr_t)(ctx->key + ctx->adata.keylen_pad);
- } else {
- keys_fit_inline = false;
+ else
ctx->adata.key = ctx->key_dma;
+
+ if (inl_mask & 2)
+ ctx->cdata.key = (uintptr_t)(ctx->key + ctx->adata.keylen_pad);
+ else
ctx->cdata.key = ctx->key_dma + ctx->adata.keylen_pad;
- }
+
+ ctx->adata.key_inline = !!(inl_mask & 1);
+ ctx->cdata.key_inline = !!(inl_mask & 2);
/* aead_decrypt shared descriptor */
desc = ctx->sh_desc_dec;
/* Note: Context registers are saved. */
- init_sh_desc_key_aead(desc, ctx, keys_fit_inline, is_rfc3686);
+ init_sh_desc_key_aead(desc, ctx, is_rfc3686);
/* Class 2 operation */
append_operation(desc, ctx->adata.algtype | OP_ALG_AS_INITFINAL |
@@ -660,24 +678,30 @@ skip_enc:
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_AEAD_GIVENC_LEN + AUTHENC_DESC_JOB_IO_LEN +
- ctx->adata.keylen_pad + ctx->cdata.keylen +
- (is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0) <=
- CAAM_DESC_BYTES_MAX) {
- keys_fit_inline = true;
+ if (desc_inline_query(DESC_AEAD_GIVENC_LEN +
+ (is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0),
+ AUTHENC_DESC_JOB_IO_LEN, data_len, &inl_mask,
+ ARRAY_SIZE(data_len)) < 0)
+ return -EINVAL;
+
+ if (inl_mask & 1)
ctx->adata.key = (uintptr_t)ctx->key;
- ctx->cdata.key = (uintptr_t)(ctx->key + ctx->adata.keylen_pad);
- } else {
- keys_fit_inline = false;
+ else
ctx->adata.key = ctx->key_dma;
+
+ if (inl_mask & 2)
+ ctx->cdata.key = (uintptr_t)(ctx->key + ctx->adata.keylen_pad);
+ else
ctx->cdata.key = ctx->key_dma + ctx->adata.keylen_pad;
- }
+
+ ctx->adata.key_inline = !!(inl_mask & 1);
+ ctx->cdata.key_inline = !!(inl_mask & 2);
/* aead_givencrypt shared descriptor */
desc = ctx->sh_desc_enc;
/* Note: Context registers are saved. */
- init_sh_desc_key_aead(desc, ctx, keys_fit_inline, is_rfc3686);
+ init_sh_desc_key_aead(desc, ctx, is_rfc3686);
if (is_rfc3686)
goto copy_iv;
@@ -787,6 +811,8 @@ static int gcm_set_sh_desc(struct crypto_aead *aead)
u32 *key_jump_cmd, *zero_payload_jump_cmd,
*zero_assoc_jump_cmd1, *zero_assoc_jump_cmd2;
u32 *desc;
+ int rem_bytes = CAAM_DESC_BYTES_MAX - GCM_DESC_JOB_IO_LEN -
+ ctx->cdata.keylen;
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
@@ -796,8 +822,7 @@ static int gcm_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_GCM_ENC_LEN + GCM_DESC_JOB_IO_LEN +
- ctx->cdata.keylen <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_GCM_ENC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key = (uintptr_t)ctx->key;
} else {
@@ -895,8 +920,7 @@ static int gcm_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_GCM_DEC_LEN + GCM_DESC_JOB_IO_LEN +
- ctx->cdata.keylen <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_GCM_DEC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key = (uintptr_t)ctx->key;
} else {
@@ -996,6 +1020,8 @@ static int rfc4106_set_sh_desc(struct crypto_aead *aead)
struct device *jrdev = ctx->jrdev;
u32 *key_jump_cmd;
u32 *desc;
+ int rem_bytes = CAAM_DESC_BYTES_MAX - GCM_DESC_JOB_IO_LEN -
+ ctx->cdata.keylen;
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
@@ -1005,8 +1031,7 @@ static int rfc4106_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_RFC4106_ENC_LEN + GCM_DESC_JOB_IO_LEN +
- ctx->cdata.keylen <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_RFC4106_ENC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key = (uintptr_t)ctx->key;
} else {
@@ -1084,8 +1109,7 @@ static int rfc4106_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_RFC4106_DEC_LEN + DESC_JOB_IO_LEN +
- ctx->cdata.keylen <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_RFC4106_DEC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key = (uintptr_t)ctx->key;
} else {
@@ -1180,6 +1204,8 @@ static int rfc4543_set_sh_desc(struct crypto_aead *aead)
u32 *key_jump_cmd;
u32 *read_move_cmd, *write_move_cmd;
u32 *desc;
+ int rem_bytes = CAAM_DESC_BYTES_MAX - GCM_DESC_JOB_IO_LEN -
+ ctx->cdata.keylen;
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
@@ -1189,8 +1215,7 @@ static int rfc4543_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_RFC4543_ENC_LEN + GCM_DESC_JOB_IO_LEN +
- ctx->cdata.keylen <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_RFC4543_ENC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key = (uintptr_t)ctx->key;
} else {
@@ -1267,8 +1292,7 @@ static int rfc4543_set_sh_desc(struct crypto_aead *aead)
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
- if (DESC_RFC4543_DEC_LEN + GCM_DESC_JOB_IO_LEN +
- ctx->cdata.keylen <= CAAM_DESC_BYTES_MAX) {
+ if (rem_bytes >= DESC_RFC4543_DEC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key = (uintptr_t)ctx->key;
} else {
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
index bfef7952dfb7..fa70c0d79c40 100644
--- a/drivers/crypto/caam/desc_constr.h
+++ b/drivers/crypto/caam/desc_constr.h
@@ -449,3 +449,42 @@ struct alginfo {
u64 key;
bool key_inline;
};
+
+/**
+ * desc_inline_query() - Provide indications on which data items can be inlined
+ * and which shall be referenced in a shared descriptor.
+ * @sd_base_len: Shared descriptor base length - bytes consumed by the commands,
+ * excluding the data items to be inlined (or corresponding
+ * pointer if an item is not inlined). Each cnstr_* function that
+ * generates descriptors should have a define mentioning
+ * corresponding length.
+ * @jd_len: Maximum length of the job descriptor(s) that will be used
+ * together with the shared descriptor.
+ * @data_len: Array of lengths of the data items trying to be inlined
+ * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0
+ * otherwise.
+ * @count: Number of data items (size of @data_len array); must be <= 32
+ *
+ * Return: 0 if data can be inlined / referenced, negative value if not. If 0,
+ * check @inl_mask for details.
+ */
+static inline int desc_inline_query(unsigned int sd_base_len,
+ unsigned int jd_len, unsigned int *data_len,
+ u32 *inl_mask, unsigned int count)
+{
+ int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len);
+ unsigned int i;
+
+ *inl_mask = 0;
+ for (i = 0; (i < count) && (rem_bytes > 0); i++) {
+ if (rem_bytes - (int)(data_len[i] +
+ (count - i - 1) * CAAM_PTR_SZ) >= 0) {
+ rem_bytes -= data_len[i];
+ *inl_mask |= (1 << i);
+ } else {
+ rem_bytes -= CAAM_PTR_SZ;
+ }
+ }
+
+ return (rem_bytes >= 0) ? 0 : -1;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 23:26:45 +0100