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caamalg_qi.c
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caamalg_qi.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Freescale FSL CAAM support for crypto API over QI backend.
* Based on caamalg.c
*
* Copyright 2013-2016 Freescale Semiconductor, Inc.
* Copyright 2016-2019 NXP
*/
#include "compat.h"
#include "ctrl.h"
#include "regs.h"
#include "intern.h"
#include "desc_constr.h"
#include "error.h"
#include "sg_sw_qm.h"
#include "key_gen.h"
#include "qi.h"
#include "jr.h"
#include "caamalg_desc.h"
#include <crypto/xts.h>
#include <asm/unaligned.h>
/*
* crypto alg
*/
#define CAAM_CRA_PRIORITY 2000
/* max key is sum of AES_MAX_KEY_SIZE, max split key size */
#define CAAM_MAX_KEY_SIZE (AES_MAX_KEY_SIZE + \
SHA512_DIGEST_SIZE * 2)
#define DESC_MAX_USED_BYTES (DESC_QI_AEAD_GIVENC_LEN + \
CAAM_MAX_KEY_SIZE)
#define DESC_MAX_USED_LEN (DESC_MAX_USED_BYTES / CAAM_CMD_SZ)
struct caam_alg_entry {
int class1_alg_type;
int class2_alg_type;
bool rfc3686;
bool geniv;
bool nodkp;
};
struct caam_aead_alg {
struct aead_alg aead;
struct caam_alg_entry caam;
bool registered;
};
struct caam_skcipher_alg {
struct skcipher_alg skcipher;
struct caam_alg_entry caam;
bool registered;
};
/*
* per-session context
*/
struct caam_ctx {
struct device *jrdev;
u32 sh_desc_enc[DESC_MAX_USED_LEN];
u32 sh_desc_dec[DESC_MAX_USED_LEN];
u8 key[CAAM_MAX_KEY_SIZE];
dma_addr_t key_dma;
enum dma_data_direction dir;
struct alginfo adata;
struct alginfo cdata;
unsigned int authsize;
struct device *qidev;
spinlock_t lock; /* Protects multiple init of driver context */
struct caam_drv_ctx *drv_ctx[NUM_OP];
bool xts_key_fallback;
struct crypto_skcipher *fallback;
};
struct caam_skcipher_req_ctx {
struct skcipher_request fallback_req;
};
static int aead_set_sh_desc(struct crypto_aead *aead)
{
struct caam_aead_alg *alg = container_of(crypto_aead_alg(aead),
typeof(*alg), aead);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
unsigned int ivsize = crypto_aead_ivsize(aead);
u32 ctx1_iv_off = 0;
u32 *nonce = NULL;
unsigned int data_len[2];
u32 inl_mask;
const bool ctr_mode = ((ctx->cdata.algtype & OP_ALG_AAI_MASK) ==
OP_ALG_AAI_CTR_MOD128);
const bool is_rfc3686 = alg->caam.rfc3686;
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctx->jrdev->parent);
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
/*
* AES-CTR needs to load IV in CONTEXT1 reg
* at an offset of 128bits (16bytes)
* CONTEXT1[255:128] = IV
*/
if (ctr_mode)
ctx1_iv_off = 16;
/*
* RFC3686 specific:
* CONTEXT1[255:128] = {NONCE, IV, COUNTER}
*/
if (is_rfc3686) {
ctx1_iv_off = 16 + CTR_RFC3686_NONCE_SIZE;
nonce = (u32 *)((void *)ctx->key + ctx->adata.keylen_pad +
ctx->cdata.keylen - CTR_RFC3686_NONCE_SIZE);
}
/*
* In case |user key| > |derived key|, using DKP<imm,imm> would result
* in invalid opcodes (last bytes of user key) in the resulting
* descriptor. Use DKP<ptr,imm> instead => both virtual and dma key
* addresses are needed.
*/
ctx->adata.key_virt = ctx->key;
ctx->adata.key_dma = ctx->key_dma;
ctx->cdata.key_virt = ctx->key + ctx->adata.keylen_pad;
ctx->cdata.key_dma = ctx->key_dma + ctx->adata.keylen_pad;
data_len[0] = ctx->adata.keylen_pad;
data_len[1] = ctx->cdata.keylen;
if (alg->caam.geniv)
goto skip_enc;
/* aead_encrypt shared descriptor */
if (desc_inline_query(DESC_QI_AEAD_ENC_LEN +
(is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0),
DESC_JOB_IO_LEN, data_len, &inl_mask,
ARRAY_SIZE(data_len)) < 0)
return -EINVAL;
ctx->adata.key_inline = !!(inl_mask & 1);
ctx->cdata.key_inline = !!(inl_mask & 2);
cnstr_shdsc_aead_encap(ctx->sh_desc_enc, &ctx->cdata, &ctx->adata,
ivsize, ctx->authsize, is_rfc3686, nonce,
ctx1_iv_off, true, ctrlpriv->era);
skip_enc:
/* aead_decrypt shared descriptor */
if (desc_inline_query(DESC_QI_AEAD_DEC_LEN +
(is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0),
DESC_JOB_IO_LEN, data_len, &inl_mask,
ARRAY_SIZE(data_len)) < 0)
return -EINVAL;
ctx->adata.key_inline = !!(inl_mask & 1);
ctx->cdata.key_inline = !!(inl_mask & 2);
cnstr_shdsc_aead_decap(ctx->sh_desc_dec, &ctx->cdata, &ctx->adata,
ivsize, ctx->authsize, alg->caam.geniv,
is_rfc3686, nonce, ctx1_iv_off, true,
ctrlpriv->era);
if (!alg->caam.geniv)
goto skip_givenc;
/* aead_givencrypt shared descriptor */
if (desc_inline_query(DESC_QI_AEAD_GIVENC_LEN +
(is_rfc3686 ? DESC_AEAD_CTR_RFC3686_LEN : 0),
DESC_JOB_IO_LEN, data_len, &inl_mask,
ARRAY_SIZE(data_len)) < 0)
return -EINVAL;
ctx->adata.key_inline = !!(inl_mask & 1);
ctx->cdata.key_inline = !!(inl_mask & 2);
cnstr_shdsc_aead_givencap(ctx->sh_desc_enc, &ctx->cdata, &ctx->adata,
ivsize, ctx->authsize, is_rfc3686, nonce,
ctx1_iv_off, true, ctrlpriv->era);
skip_givenc:
return 0;
}
static int aead_setauthsize(struct crypto_aead *authenc, unsigned int authsize)
{
struct caam_ctx *ctx = crypto_aead_ctx(authenc);
ctx->authsize = authsize;
aead_set_sh_desc(authenc);
return 0;
}
static int aead_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int keylen)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
struct caam_drv_private *ctrlpriv = dev_get_drvdata(jrdev->parent);
struct crypto_authenc_keys keys;
int ret = 0;
if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
goto badkey;
dev_dbg(jrdev, "keylen %d enckeylen %d authkeylen %d\n",
keys.authkeylen + keys.enckeylen, keys.enckeylen,
keys.authkeylen);
print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
/*
* If DKP is supported, use it in the shared descriptor to generate
* the split key.
*/
if (ctrlpriv->era >= 6) {
ctx->adata.keylen = keys.authkeylen;
ctx->adata.keylen_pad = split_key_len(ctx->adata.algtype &
OP_ALG_ALGSEL_MASK);
if (ctx->adata.keylen_pad + keys.enckeylen > CAAM_MAX_KEY_SIZE)
goto badkey;
memcpy(ctx->key, keys.authkey, keys.authkeylen);
memcpy(ctx->key + ctx->adata.keylen_pad, keys.enckey,
keys.enckeylen);
dma_sync_single_for_device(jrdev->parent, ctx->key_dma,
ctx->adata.keylen_pad +
keys.enckeylen, ctx->dir);
goto skip_split_key;
}
ret = gen_split_key(jrdev, ctx->key, &ctx->adata, keys.authkey,
keys.authkeylen, CAAM_MAX_KEY_SIZE -
keys.enckeylen);
if (ret)
goto badkey;
/* postpend encryption key to auth split key */
memcpy(ctx->key + ctx->adata.keylen_pad, keys.enckey, keys.enckeylen);
dma_sync_single_for_device(jrdev->parent, ctx->key_dma,
ctx->adata.keylen_pad + keys.enckeylen,
ctx->dir);
print_hex_dump_debug("ctx.key@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
ctx->adata.keylen_pad + keys.enckeylen, 1);
skip_split_key:
ctx->cdata.keylen = keys.enckeylen;
ret = aead_set_sh_desc(aead);
if (ret)
goto badkey;
/* Now update the driver contexts with the new shared descriptor */
if (ctx->drv_ctx[ENCRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[ENCRYPT],
ctx->sh_desc_enc);
if (ret) {
dev_err(jrdev, "driver enc context update failed\n");
goto badkey;
}
}
if (ctx->drv_ctx[DECRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[DECRYPT],
ctx->sh_desc_dec);
if (ret) {
dev_err(jrdev, "driver dec context update failed\n");
goto badkey;
}
}
memzero_explicit(&keys, sizeof(keys));
return ret;
badkey:
memzero_explicit(&keys, sizeof(keys));
return -EINVAL;
}
static int des3_aead_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int keylen)
{
struct crypto_authenc_keys keys;
int err;
err = crypto_authenc_extractkeys(&keys, key, keylen);
if (unlikely(err))
return err;
err = verify_aead_des3_key(aead, keys.enckey, keys.enckeylen) ?:
aead_setkey(aead, key, keylen);
memzero_explicit(&keys, sizeof(keys));
return err;
}
static int gcm_set_sh_desc(struct crypto_aead *aead)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
unsigned int ivsize = crypto_aead_ivsize(aead);
int rem_bytes = CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN -
ctx->cdata.keylen;
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
/*
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
if (rem_bytes >= DESC_QI_GCM_ENC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key_virt = ctx->key;
} else {
ctx->cdata.key_inline = false;
ctx->cdata.key_dma = ctx->key_dma;
}
cnstr_shdsc_gcm_encap(ctx->sh_desc_enc, &ctx->cdata, ivsize,
ctx->authsize, true);
/*
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
if (rem_bytes >= DESC_QI_GCM_DEC_LEN) {
ctx->cdata.key_inline = true;
ctx->cdata.key_virt = ctx->key;
} else {
ctx->cdata.key_inline = false;
ctx->cdata.key_dma = ctx->key_dma;
}
cnstr_shdsc_gcm_decap(ctx->sh_desc_dec, &ctx->cdata, ivsize,
ctx->authsize, true);
return 0;
}
static int gcm_setauthsize(struct crypto_aead *authenc, unsigned int authsize)
{
struct caam_ctx *ctx = crypto_aead_ctx(authenc);
int err;
err = crypto_gcm_check_authsize(authsize);
if (err)
return err;
ctx->authsize = authsize;
gcm_set_sh_desc(authenc);
return 0;
}
static int gcm_setkey(struct crypto_aead *aead,
const u8 *key, unsigned int keylen)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
int ret;
ret = aes_check_keylen(keylen);
if (ret)
return ret;
print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
memcpy(ctx->key, key, keylen);
dma_sync_single_for_device(jrdev->parent, ctx->key_dma, keylen,
ctx->dir);
ctx->cdata.keylen = keylen;
ret = gcm_set_sh_desc(aead);
if (ret)
return ret;
/* Now update the driver contexts with the new shared descriptor */
if (ctx->drv_ctx[ENCRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[ENCRYPT],
ctx->sh_desc_enc);
if (ret) {
dev_err(jrdev, "driver enc context update failed\n");
return ret;
}
}
if (ctx->drv_ctx[DECRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[DECRYPT],
ctx->sh_desc_dec);
if (ret) {
dev_err(jrdev, "driver dec context update failed\n");
return ret;
}
}
return 0;
}
static int rfc4106_set_sh_desc(struct crypto_aead *aead)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
unsigned int ivsize = crypto_aead_ivsize(aead);
int rem_bytes = CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN -
ctx->cdata.keylen;
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
ctx->cdata.key_virt = ctx->key;
/*
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
if (rem_bytes >= DESC_QI_RFC4106_ENC_LEN) {
ctx->cdata.key_inline = true;
} else {
ctx->cdata.key_inline = false;
ctx->cdata.key_dma = ctx->key_dma;
}
cnstr_shdsc_rfc4106_encap(ctx->sh_desc_enc, &ctx->cdata, ivsize,
ctx->authsize, true);
/*
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
if (rem_bytes >= DESC_QI_RFC4106_DEC_LEN) {
ctx->cdata.key_inline = true;
} else {
ctx->cdata.key_inline = false;
ctx->cdata.key_dma = ctx->key_dma;
}
cnstr_shdsc_rfc4106_decap(ctx->sh_desc_dec, &ctx->cdata, ivsize,
ctx->authsize, true);
return 0;
}
static int rfc4106_setauthsize(struct crypto_aead *authenc,
unsigned int authsize)
{
struct caam_ctx *ctx = crypto_aead_ctx(authenc);
int err;
err = crypto_rfc4106_check_authsize(authsize);
if (err)
return err;
ctx->authsize = authsize;
rfc4106_set_sh_desc(authenc);
return 0;
}
static int rfc4106_setkey(struct crypto_aead *aead,
const u8 *key, unsigned int keylen)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
int ret;
ret = aes_check_keylen(keylen - 4);
if (ret)
return ret;
print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
memcpy(ctx->key, key, keylen);
/*
* The last four bytes of the key material are used as the salt value
* in the nonce. Update the AES key length.
*/
ctx->cdata.keylen = keylen - 4;
dma_sync_single_for_device(jrdev->parent, ctx->key_dma,
ctx->cdata.keylen, ctx->dir);
ret = rfc4106_set_sh_desc(aead);
if (ret)
return ret;
/* Now update the driver contexts with the new shared descriptor */
if (ctx->drv_ctx[ENCRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[ENCRYPT],
ctx->sh_desc_enc);
if (ret) {
dev_err(jrdev, "driver enc context update failed\n");
return ret;
}
}
if (ctx->drv_ctx[DECRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[DECRYPT],
ctx->sh_desc_dec);
if (ret) {
dev_err(jrdev, "driver dec context update failed\n");
return ret;
}
}
return 0;
}
static int rfc4543_set_sh_desc(struct crypto_aead *aead)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
unsigned int ivsize = crypto_aead_ivsize(aead);
int rem_bytes = CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN -
ctx->cdata.keylen;
if (!ctx->cdata.keylen || !ctx->authsize)
return 0;
ctx->cdata.key_virt = ctx->key;
/*
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
if (rem_bytes >= DESC_QI_RFC4543_ENC_LEN) {
ctx->cdata.key_inline = true;
} else {
ctx->cdata.key_inline = false;
ctx->cdata.key_dma = ctx->key_dma;
}
cnstr_shdsc_rfc4543_encap(ctx->sh_desc_enc, &ctx->cdata, ivsize,
ctx->authsize, true);
/*
* Job Descriptor and Shared Descriptor
* must fit into the 64-word Descriptor h/w Buffer
*/
if (rem_bytes >= DESC_QI_RFC4543_DEC_LEN) {
ctx->cdata.key_inline = true;
} else {
ctx->cdata.key_inline = false;
ctx->cdata.key_dma = ctx->key_dma;
}
cnstr_shdsc_rfc4543_decap(ctx->sh_desc_dec, &ctx->cdata, ivsize,
ctx->authsize, true);
return 0;
}
static int rfc4543_setauthsize(struct crypto_aead *authenc,
unsigned int authsize)
{
struct caam_ctx *ctx = crypto_aead_ctx(authenc);
if (authsize != 16)
return -EINVAL;
ctx->authsize = authsize;
rfc4543_set_sh_desc(authenc);
return 0;
}
static int rfc4543_setkey(struct crypto_aead *aead,
const u8 *key, unsigned int keylen)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
int ret;
ret = aes_check_keylen(keylen - 4);
if (ret)
return ret;
print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
memcpy(ctx->key, key, keylen);
/*
* The last four bytes of the key material are used as the salt value
* in the nonce. Update the AES key length.
*/
ctx->cdata.keylen = keylen - 4;
dma_sync_single_for_device(jrdev->parent, ctx->key_dma,
ctx->cdata.keylen, ctx->dir);
ret = rfc4543_set_sh_desc(aead);
if (ret)
return ret;
/* Now update the driver contexts with the new shared descriptor */
if (ctx->drv_ctx[ENCRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[ENCRYPT],
ctx->sh_desc_enc);
if (ret) {
dev_err(jrdev, "driver enc context update failed\n");
return ret;
}
}
if (ctx->drv_ctx[DECRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[DECRYPT],
ctx->sh_desc_dec);
if (ret) {
dev_err(jrdev, "driver dec context update failed\n");
return ret;
}
}
return 0;
}
static int skcipher_setkey(struct crypto_skcipher *skcipher, const u8 *key,
unsigned int keylen, const u32 ctx1_iv_off)
{
struct caam_ctx *ctx = crypto_skcipher_ctx(skcipher);
struct caam_skcipher_alg *alg =
container_of(crypto_skcipher_alg(skcipher), typeof(*alg),
skcipher);
struct device *jrdev = ctx->jrdev;
unsigned int ivsize = crypto_skcipher_ivsize(skcipher);
const bool is_rfc3686 = alg->caam.rfc3686;
int ret = 0;
print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
ctx->cdata.keylen = keylen;
ctx->cdata.key_virt = key;
ctx->cdata.key_inline = true;
/* skcipher encrypt, decrypt shared descriptors */
cnstr_shdsc_skcipher_encap(ctx->sh_desc_enc, &ctx->cdata, ivsize,
is_rfc3686, ctx1_iv_off);
cnstr_shdsc_skcipher_decap(ctx->sh_desc_dec, &ctx->cdata, ivsize,
is_rfc3686, ctx1_iv_off);
/* Now update the driver contexts with the new shared descriptor */
if (ctx->drv_ctx[ENCRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[ENCRYPT],
ctx->sh_desc_enc);
if (ret) {
dev_err(jrdev, "driver enc context update failed\n");
return -EINVAL;
}
}
if (ctx->drv_ctx[DECRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[DECRYPT],
ctx->sh_desc_dec);
if (ret) {
dev_err(jrdev, "driver dec context update failed\n");
return -EINVAL;
}
}
return ret;
}
static int aes_skcipher_setkey(struct crypto_skcipher *skcipher,
const u8 *key, unsigned int keylen)
{
int err;
err = aes_check_keylen(keylen);
if (err)
return err;
return skcipher_setkey(skcipher, key, keylen, 0);
}
static int rfc3686_skcipher_setkey(struct crypto_skcipher *skcipher,
const u8 *key, unsigned int keylen)
{
u32 ctx1_iv_off;
int err;
/*
* RFC3686 specific:
* | CONTEXT1[255:128] = {NONCE, IV, COUNTER}
* | *key = {KEY, NONCE}
*/
ctx1_iv_off = 16 + CTR_RFC3686_NONCE_SIZE;
keylen -= CTR_RFC3686_NONCE_SIZE;
err = aes_check_keylen(keylen);
if (err)
return err;
return skcipher_setkey(skcipher, key, keylen, ctx1_iv_off);
}
static int ctr_skcipher_setkey(struct crypto_skcipher *skcipher,
const u8 *key, unsigned int keylen)
{
u32 ctx1_iv_off;
int err;
/*
* AES-CTR needs to load IV in CONTEXT1 reg
* at an offset of 128bits (16bytes)
* CONTEXT1[255:128] = IV
*/
ctx1_iv_off = 16;
err = aes_check_keylen(keylen);
if (err)
return err;
return skcipher_setkey(skcipher, key, keylen, ctx1_iv_off);
}
static int des3_skcipher_setkey(struct crypto_skcipher *skcipher,
const u8 *key, unsigned int keylen)
{
return verify_skcipher_des3_key(skcipher, key) ?:
skcipher_setkey(skcipher, key, keylen, 0);
}
static int des_skcipher_setkey(struct crypto_skcipher *skcipher,
const u8 *key, unsigned int keylen)
{
return verify_skcipher_des_key(skcipher, key) ?:
skcipher_setkey(skcipher, key, keylen, 0);
}
static int xts_skcipher_setkey(struct crypto_skcipher *skcipher, const u8 *key,
unsigned int keylen)
{
struct caam_ctx *ctx = crypto_skcipher_ctx(skcipher);
struct device *jrdev = ctx->jrdev;
struct caam_drv_private *ctrlpriv = dev_get_drvdata(jrdev->parent);
int ret = 0;
int err;
err = xts_verify_key(skcipher, key, keylen);
if (err) {
dev_dbg(jrdev, "key size mismatch\n");
return err;
}
if (keylen != 2 * AES_KEYSIZE_128 && keylen != 2 * AES_KEYSIZE_256)
ctx->xts_key_fallback = true;
if (ctrlpriv->era <= 8 || ctx->xts_key_fallback) {
err = crypto_skcipher_setkey(ctx->fallback, key, keylen);
if (err)
return err;
}
ctx->cdata.keylen = keylen;
ctx->cdata.key_virt = key;
ctx->cdata.key_inline = true;
/* xts skcipher encrypt, decrypt shared descriptors */
cnstr_shdsc_xts_skcipher_encap(ctx->sh_desc_enc, &ctx->cdata);
cnstr_shdsc_xts_skcipher_decap(ctx->sh_desc_dec, &ctx->cdata);
/* Now update the driver contexts with the new shared descriptor */
if (ctx->drv_ctx[ENCRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[ENCRYPT],
ctx->sh_desc_enc);
if (ret) {
dev_err(jrdev, "driver enc context update failed\n");
return -EINVAL;
}
}
if (ctx->drv_ctx[DECRYPT]) {
ret = caam_drv_ctx_update(ctx->drv_ctx[DECRYPT],
ctx->sh_desc_dec);
if (ret) {
dev_err(jrdev, "driver dec context update failed\n");
return -EINVAL;
}
}
return ret;
}
/*
* aead_edesc - s/w-extended aead descriptor
* @src_nents: number of segments in input scatterlist
* @dst_nents: number of segments in output scatterlist
* @iv_dma: dma address of iv for checking continuity and link table
* @qm_sg_bytes: length of dma mapped h/w link table
* @qm_sg_dma: bus physical mapped address of h/w link table
* @assoclen: associated data length, in CAAM endianness
* @assoclen_dma: bus physical mapped address of req->assoclen
* @drv_req: driver-specific request structure
* @sgt: the h/w link table, followed by IV
*/
struct aead_edesc {
int src_nents;
int dst_nents;
dma_addr_t iv_dma;
int qm_sg_bytes;
dma_addr_t qm_sg_dma;
unsigned int assoclen;
dma_addr_t assoclen_dma;
struct caam_drv_req drv_req;
struct qm_sg_entry sgt[];
};
/*
* skcipher_edesc - s/w-extended skcipher descriptor
* @src_nents: number of segments in input scatterlist
* @dst_nents: number of segments in output scatterlist
* @iv_dma: dma address of iv for checking continuity and link table
* @qm_sg_bytes: length of dma mapped h/w link table
* @qm_sg_dma: bus physical mapped address of h/w link table
* @drv_req: driver-specific request structure
* @sgt: the h/w link table, followed by IV
*/
struct skcipher_edesc {
int src_nents;
int dst_nents;
dma_addr_t iv_dma;
int qm_sg_bytes;
dma_addr_t qm_sg_dma;
struct caam_drv_req drv_req;
struct qm_sg_entry sgt[];
};
static struct caam_drv_ctx *get_drv_ctx(struct caam_ctx *ctx,
enum optype type)
{
/*
* This function is called on the fast path with values of 'type'
* known at compile time. Invalid arguments are not expected and
* thus no checks are made.
*/
struct caam_drv_ctx *drv_ctx = ctx->drv_ctx[type];
u32 *desc;
if (unlikely(!drv_ctx)) {
spin_lock(&ctx->lock);
/* Read again to check if some other core init drv_ctx */
drv_ctx = ctx->drv_ctx[type];
if (!drv_ctx) {
int cpu;
if (type == ENCRYPT)
desc = ctx->sh_desc_enc;
else /* (type == DECRYPT) */
desc = ctx->sh_desc_dec;
cpu = smp_processor_id();
drv_ctx = caam_drv_ctx_init(ctx->qidev, &cpu, desc);
if (!IS_ERR_OR_NULL(drv_ctx))
drv_ctx->op_type = type;
ctx->drv_ctx[type] = drv_ctx;
}
spin_unlock(&ctx->lock);
}
return drv_ctx;
}
static void caam_unmap(struct device *dev, struct scatterlist *src,
struct scatterlist *dst, int src_nents,
int dst_nents, dma_addr_t iv_dma, int ivsize,
enum dma_data_direction iv_dir, dma_addr_t qm_sg_dma,
int qm_sg_bytes)
{
if (dst != src) {
if (src_nents)
dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
if (dst_nents)
dma_unmap_sg(dev, dst, dst_nents, DMA_FROM_DEVICE);
} else {
dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
}
if (iv_dma)
dma_unmap_single(dev, iv_dma, ivsize, iv_dir);
if (qm_sg_bytes)
dma_unmap_single(dev, qm_sg_dma, qm_sg_bytes, DMA_TO_DEVICE);
}
static void aead_unmap(struct device *dev,
struct aead_edesc *edesc,
struct aead_request *req)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
int ivsize = crypto_aead_ivsize(aead);
caam_unmap(dev, req->src, req->dst, edesc->src_nents, edesc->dst_nents,
edesc->iv_dma, ivsize, DMA_TO_DEVICE, edesc->qm_sg_dma,
edesc->qm_sg_bytes);
dma_unmap_single(dev, edesc->assoclen_dma, 4, DMA_TO_DEVICE);
}
static void skcipher_unmap(struct device *dev, struct skcipher_edesc *edesc,
struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
int ivsize = crypto_skcipher_ivsize(skcipher);
caam_unmap(dev, req->src, req->dst, edesc->src_nents, edesc->dst_nents,
edesc->iv_dma, ivsize, DMA_BIDIRECTIONAL, edesc->qm_sg_dma,
edesc->qm_sg_bytes);
}
static void aead_done(struct caam_drv_req *drv_req, u32 status)
{
struct device *qidev;
struct aead_edesc *edesc;
struct aead_request *aead_req = drv_req->app_ctx;
struct crypto_aead *aead = crypto_aead_reqtfm(aead_req);
struct caam_ctx *caam_ctx = crypto_aead_ctx(aead);
int ecode = 0;
qidev = caam_ctx->qidev;
if (unlikely(status))
ecode = caam_jr_strstatus(qidev, status);
edesc = container_of(drv_req, typeof(*edesc), drv_req);
aead_unmap(qidev, edesc, aead_req);
aead_request_complete(aead_req, ecode);
qi_cache_free(edesc);
}
/*
* allocate and map the aead extended descriptor
*/
static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
bool encrypt)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct caam_aead_alg *alg = container_of(crypto_aead_alg(aead),
typeof(*alg), aead);
struct device *qidev = ctx->qidev;
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
int src_len, dst_len = 0;
struct aead_edesc *edesc;
dma_addr_t qm_sg_dma, iv_dma = 0;
int ivsize = 0;
unsigned int authsize = ctx->authsize;
int qm_sg_index = 0, qm_sg_ents = 0, qm_sg_bytes;
int in_len, out_len;
struct qm_sg_entry *sg_table, *fd_sgt;
struct caam_drv_ctx *drv_ctx;
drv_ctx = get_drv_ctx(ctx, encrypt ? ENCRYPT : DECRYPT);
if (IS_ERR_OR_NULL(drv_ctx))
return (struct aead_edesc *)drv_ctx;
/* allocate space for base edesc and hw desc commands, link tables */
edesc = qi_cache_alloc(GFP_DMA | flags);
if (unlikely(!edesc)) {
dev_err(qidev, "could not allocate extended descriptor\n");
return ERR_PTR(-ENOMEM);
}
if (likely(req->src == req->dst)) {
src_len = req->assoclen + req->cryptlen +
(encrypt ? authsize : 0);
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(qidev, "Insufficient bytes (%d) in src S/G\n",
src_len);
qi_cache_free(edesc);
return ERR_PTR(src_nents);
}
mapped_src_nents = dma_map_sg(qidev, req->src, src_nents,
DMA_BIDIRECTIONAL);
if (unlikely(!mapped_src_nents)) {
dev_err(qidev, "unable to map source\n");
qi_cache_free(edesc);
return ERR_PTR(-ENOMEM);
}
} else {
src_len = req->assoclen + req->cryptlen;
dst_len = src_len + (encrypt ? authsize : (-authsize));
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(qidev, "Insufficient bytes (%d) in src S/G\n",
src_len);
qi_cache_free(edesc);
return ERR_PTR(src_nents);
}
dst_nents = sg_nents_for_len(req->dst, dst_len);
if (unlikely(dst_nents < 0)) {