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|
// SPDX-License-Identifier: GPL-2.0
/*
* StarFive AES acceleration driver
*
* Copyright (c) 2022 StarFive Technology
*/
#include <linux/iopoll.h>
#include <crypto/gcm.h>
#include <crypto/scatterwalk.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/skcipher.h>
#include "jh7110-cryp.h"
#define STARFIVE_AES_REGS_OFFSET 0x100
#define STARFIVE_AES_AESDIO0R (STARFIVE_AES_REGS_OFFSET + 0x0)
#define STARFIVE_AES_KEY0 (STARFIVE_AES_REGS_OFFSET + 0x4)
#define STARFIVE_AES_KEY1 (STARFIVE_AES_REGS_OFFSET + 0x8)
#define STARFIVE_AES_KEY2 (STARFIVE_AES_REGS_OFFSET + 0xC)
#define STARFIVE_AES_KEY3 (STARFIVE_AES_REGS_OFFSET + 0x10)
#define STARFIVE_AES_KEY4 (STARFIVE_AES_REGS_OFFSET + 0x14)
#define STARFIVE_AES_KEY5 (STARFIVE_AES_REGS_OFFSET + 0x18)
#define STARFIVE_AES_KEY6 (STARFIVE_AES_REGS_OFFSET + 0x1C)
#define STARFIVE_AES_KEY7 (STARFIVE_AES_REGS_OFFSET + 0x20)
#define STARFIVE_AES_CSR (STARFIVE_AES_REGS_OFFSET + 0x24)
#define STARFIVE_AES_IV0 (STARFIVE_AES_REGS_OFFSET + 0x28)
#define STARFIVE_AES_IV1 (STARFIVE_AES_REGS_OFFSET + 0x2C)
#define STARFIVE_AES_IV2 (STARFIVE_AES_REGS_OFFSET + 0x30)
#define STARFIVE_AES_IV3 (STARFIVE_AES_REGS_OFFSET + 0x34)
#define STARFIVE_AES_NONCE0 (STARFIVE_AES_REGS_OFFSET + 0x3C)
#define STARFIVE_AES_NONCE1 (STARFIVE_AES_REGS_OFFSET + 0x40)
#define STARFIVE_AES_NONCE2 (STARFIVE_AES_REGS_OFFSET + 0x44)
#define STARFIVE_AES_NONCE3 (STARFIVE_AES_REGS_OFFSET + 0x48)
#define STARFIVE_AES_ALEN0 (STARFIVE_AES_REGS_OFFSET + 0x4C)
#define STARFIVE_AES_ALEN1 (STARFIVE_AES_REGS_OFFSET + 0x50)
#define STARFIVE_AES_MLEN0 (STARFIVE_AES_REGS_OFFSET + 0x54)
#define STARFIVE_AES_MLEN1 (STARFIVE_AES_REGS_OFFSET + 0x58)
#define STARFIVE_AES_IVLEN (STARFIVE_AES_REGS_OFFSET + 0x5C)
#define FLG_MODE_MASK GENMASK(2, 0)
#define FLG_ENCRYPT BIT(4)
/* Misc */
#define CCM_B0_ADATA 0x40
#define AES_BLOCK_32 (AES_BLOCK_SIZE / sizeof(u32))
static inline int starfive_aes_wait_busy(struct starfive_cryp_dev *cryp)
{
u32 status;
return readl_relaxed_poll_timeout(cryp->base + STARFIVE_AES_CSR, status,
!(status & STARFIVE_AES_BUSY), 10, 100000);
}
static inline int starfive_aes_wait_keydone(struct starfive_cryp_dev *cryp)
{
u32 status;
return readl_relaxed_poll_timeout(cryp->base + STARFIVE_AES_CSR, status,
(status & STARFIVE_AES_KEY_DONE), 10, 100000);
}
static inline int starfive_aes_wait_gcmdone(struct starfive_cryp_dev *cryp)
{
u32 status;
return readl_relaxed_poll_timeout(cryp->base + STARFIVE_AES_CSR, status,
(status & STARFIVE_AES_GCM_DONE), 10, 100000);
}
static inline int is_gcm(struct starfive_cryp_dev *cryp)
{
return (cryp->flags & FLG_MODE_MASK) == STARFIVE_AES_MODE_GCM;
}
static inline int is_encrypt(struct starfive_cryp_dev *cryp)
{
return cryp->flags & FLG_ENCRYPT;
}
static void starfive_aes_aead_hw_start(struct starfive_cryp_ctx *ctx, u32 hw_mode)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
unsigned int value;
switch (hw_mode) {
case STARFIVE_AES_MODE_GCM:
value = readl(ctx->cryp->base + STARFIVE_AES_CSR);
value |= STARFIVE_AES_GCM_START;
writel(value, cryp->base + STARFIVE_AES_CSR);
starfive_aes_wait_gcmdone(cryp);
break;
case STARFIVE_AES_MODE_CCM:
value = readl(ctx->cryp->base + STARFIVE_AES_CSR);
value |= STARFIVE_AES_CCM_START;
writel(value, cryp->base + STARFIVE_AES_CSR);
break;
}
}
static inline void starfive_aes_set_ivlen(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
if (is_gcm(cryp))
writel(GCM_AES_IV_SIZE, cryp->base + STARFIVE_AES_IVLEN);
else
writel(AES_BLOCK_SIZE, cryp->base + STARFIVE_AES_IVLEN);
}
static inline void starfive_aes_set_alen(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
writel(upper_32_bits(cryp->assoclen), cryp->base + STARFIVE_AES_ALEN0);
writel(lower_32_bits(cryp->assoclen), cryp->base + STARFIVE_AES_ALEN1);
}
static inline void starfive_aes_set_mlen(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
writel(upper_32_bits(cryp->total_in), cryp->base + STARFIVE_AES_MLEN0);
writel(lower_32_bits(cryp->total_in), cryp->base + STARFIVE_AES_MLEN1);
}
static inline int starfive_aes_ccm_check_iv(const u8 *iv)
{
/* 2 <= L <= 8, so 1 <= L' <= 7. */
if (iv[0] < 1 || iv[0] > 7)
return -EINVAL;
return 0;
}
static int starfive_aes_write_iv(struct starfive_cryp_ctx *ctx, u32 *iv)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
writel(iv[0], cryp->base + STARFIVE_AES_IV0);
writel(iv[1], cryp->base + STARFIVE_AES_IV1);
writel(iv[2], cryp->base + STARFIVE_AES_IV2);
if (is_gcm(cryp)) {
if (starfive_aes_wait_gcmdone(cryp))
return -ETIMEDOUT;
return 0;
}
writel(iv[3], cryp->base + STARFIVE_AES_IV3);
return 0;
}
static inline void starfive_aes_get_iv(struct starfive_cryp_dev *cryp, u32 *iv)
{
iv[0] = readl(cryp->base + STARFIVE_AES_IV0);
iv[1] = readl(cryp->base + STARFIVE_AES_IV1);
iv[2] = readl(cryp->base + STARFIVE_AES_IV2);
iv[3] = readl(cryp->base + STARFIVE_AES_IV3);
}
static inline void starfive_aes_write_nonce(struct starfive_cryp_ctx *ctx, u32 *nonce)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
writel(nonce[0], cryp->base + STARFIVE_AES_NONCE0);
writel(nonce[1], cryp->base + STARFIVE_AES_NONCE1);
writel(nonce[2], cryp->base + STARFIVE_AES_NONCE2);
writel(nonce[3], cryp->base + STARFIVE_AES_NONCE3);
}
static int starfive_aes_write_key(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
u32 *key = (u32 *)ctx->key;
if (ctx->keylen >= AES_KEYSIZE_128) {
writel(key[0], cryp->base + STARFIVE_AES_KEY0);
writel(key[1], cryp->base + STARFIVE_AES_KEY1);
writel(key[2], cryp->base + STARFIVE_AES_KEY2);
writel(key[3], cryp->base + STARFIVE_AES_KEY3);
}
if (ctx->keylen >= AES_KEYSIZE_192) {
writel(key[4], cryp->base + STARFIVE_AES_KEY4);
writel(key[5], cryp->base + STARFIVE_AES_KEY5);
}
if (ctx->keylen >= AES_KEYSIZE_256) {
writel(key[6], cryp->base + STARFIVE_AES_KEY6);
writel(key[7], cryp->base + STARFIVE_AES_KEY7);
}
if (starfive_aes_wait_keydone(cryp))
return -ETIMEDOUT;
return 0;
}
static int starfive_aes_ccm_init(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
u8 iv[AES_BLOCK_SIZE], b0[AES_BLOCK_SIZE];
unsigned int textlen;
memcpy(iv, cryp->req.areq->iv, AES_BLOCK_SIZE);
memset(iv + AES_BLOCK_SIZE - 1 - iv[0], 0, iv[0] + 1);
/* Build B0 */
memcpy(b0, iv, AES_BLOCK_SIZE);
b0[0] |= (8 * ((cryp->authsize - 2) / 2));
if (cryp->assoclen)
b0[0] |= CCM_B0_ADATA;
textlen = cryp->total_in;
b0[AES_BLOCK_SIZE - 2] = textlen >> 8;
b0[AES_BLOCK_SIZE - 1] = textlen & 0xFF;
starfive_aes_write_nonce(ctx, (u32 *)b0);
return 0;
}
static int starfive_aes_hw_init(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_request_ctx *rctx = ctx->rctx;
struct starfive_cryp_dev *cryp = ctx->cryp;
u32 hw_mode;
/* reset */
rctx->csr.aes.v = 0;
rctx->csr.aes.aesrst = 1;
writel(rctx->csr.aes.v, cryp->base + STARFIVE_AES_CSR);
/* csr setup */
hw_mode = cryp->flags & FLG_MODE_MASK;
rctx->csr.aes.v = 0;
switch (ctx->keylen) {
case AES_KEYSIZE_128:
rctx->csr.aes.keymode = STARFIVE_AES_KEYMODE_128;
break;
case AES_KEYSIZE_192:
rctx->csr.aes.keymode = STARFIVE_AES_KEYMODE_192;
break;
case AES_KEYSIZE_256:
rctx->csr.aes.keymode = STARFIVE_AES_KEYMODE_256;
break;
}
rctx->csr.aes.mode = hw_mode;
rctx->csr.aes.cmode = !is_encrypt(cryp);
rctx->csr.aes.ie = 1;
if (hw_mode == STARFIVE_AES_MODE_CFB ||
hw_mode == STARFIVE_AES_MODE_OFB)
rctx->csr.aes.stmode = STARFIVE_AES_MODE_XFB_128;
else
rctx->csr.aes.stmode = STARFIVE_AES_MODE_XFB_1;
if (cryp->side_chan) {
rctx->csr.aes.delay_aes = 1;
rctx->csr.aes.vaes_start = 1;
}
writel(rctx->csr.aes.v, cryp->base + STARFIVE_AES_CSR);
cryp->err = starfive_aes_write_key(ctx);
if (cryp->err)
return cryp->err;
switch (hw_mode) {
case STARFIVE_AES_MODE_GCM:
starfive_aes_set_alen(ctx);
starfive_aes_set_mlen(ctx);
starfive_aes_set_ivlen(ctx);
starfive_aes_aead_hw_start(ctx, hw_mode);
starfive_aes_write_iv(ctx, (void *)cryp->req.areq->iv);
break;
case STARFIVE_AES_MODE_CCM:
starfive_aes_set_alen(ctx);
starfive_aes_set_mlen(ctx);
starfive_aes_ccm_init(ctx);
starfive_aes_aead_hw_start(ctx, hw_mode);
break;
case STARFIVE_AES_MODE_OFB:
case STARFIVE_AES_MODE_CFB:
case STARFIVE_AES_MODE_CBC:
case STARFIVE_AES_MODE_CTR:
starfive_aes_write_iv(ctx, (void *)cryp->req.sreq->iv);
break;
default:
break;
}
return cryp->err;
}
static int starfive_aes_read_authtag(struct starfive_cryp_dev *cryp)
{
int i, start_addr;
if (starfive_aes_wait_busy(cryp))
return dev_err_probe(cryp->dev, -ETIMEDOUT,
"Timeout waiting for tag generation.");
start_addr = STARFIVE_AES_NONCE0;
if (is_gcm(cryp))
for (i = 0; i < AES_BLOCK_32; i++, start_addr += 4)
cryp->tag_out[i] = readl(cryp->base + start_addr);
else
for (i = 0; i < AES_BLOCK_32; i++)
cryp->tag_out[i] = readl(cryp->base + STARFIVE_AES_AESDIO0R);
if (is_encrypt(cryp)) {
scatterwalk_copychunks(cryp->tag_out, &cryp->out_walk, cryp->authsize, 1);
} else {
scatterwalk_copychunks(cryp->tag_in, &cryp->in_walk, cryp->authsize, 0);
if (crypto_memneq(cryp->tag_in, cryp->tag_out, cryp->authsize))
return dev_err_probe(cryp->dev, -EBADMSG, "Failed tag verification\n");
}
return 0;
}
static void starfive_aes_finish_req(struct starfive_cryp_dev *cryp)
{
union starfive_aes_csr csr;
int err = cryp->err;
if (!err && cryp->authsize)
err = starfive_aes_read_authtag(cryp);
if (!err && ((cryp->flags & FLG_MODE_MASK) == STARFIVE_AES_MODE_CBC ||
(cryp->flags & FLG_MODE_MASK) == STARFIVE_AES_MODE_CTR))
starfive_aes_get_iv(cryp, (void *)cryp->req.sreq->iv);
/* reset irq flags*/
csr.v = 0;
csr.aesrst = 1;
writel(csr.v, cryp->base + STARFIVE_AES_CSR);
if (cryp->authsize)
crypto_finalize_aead_request(cryp->engine, cryp->req.areq, err);
else
crypto_finalize_skcipher_request(cryp->engine, cryp->req.sreq,
err);
}
void starfive_aes_done_task(unsigned long param)
{
struct starfive_cryp_dev *cryp = (struct starfive_cryp_dev *)param;
u32 block[AES_BLOCK_32];
u32 stat;
int i;
for (i = 0; i < AES_BLOCK_32; i++)
block[i] = readl(cryp->base + STARFIVE_AES_AESDIO0R);
scatterwalk_copychunks(block, &cryp->out_walk, min_t(size_t, AES_BLOCK_SIZE,
cryp->total_out), 1);
cryp->total_out -= min_t(size_t, AES_BLOCK_SIZE, cryp->total_out);
if (!cryp->total_out) {
starfive_aes_finish_req(cryp);
return;
}
memset(block, 0, AES_BLOCK_SIZE);
scatterwalk_copychunks(block, &cryp->in_walk, min_t(size_t, AES_BLOCK_SIZE,
cryp->total_in), 0);
cryp->total_in -= min_t(size_t, AES_BLOCK_SIZE, cryp->total_in);
for (i = 0; i < AES_BLOCK_32; i++)
writel(block[i], cryp->base + STARFIVE_AES_AESDIO0R);
stat = readl(cryp->base + STARFIVE_IE_MASK_OFFSET);
stat &= ~STARFIVE_IE_MASK_AES_DONE;
writel(stat, cryp->base + STARFIVE_IE_MASK_OFFSET);
}
static int starfive_aes_gcm_write_adata(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
struct starfive_cryp_request_ctx *rctx = ctx->rctx;
u32 *buffer;
int total_len, loop;
total_len = ALIGN(cryp->assoclen, AES_BLOCK_SIZE) / sizeof(unsigned int);
buffer = (u32 *)rctx->adata;
for (loop = 0; loop < total_len; loop += 4) {
writel(*buffer, cryp->base + STARFIVE_AES_NONCE0);
buffer++;
writel(*buffer, cryp->base + STARFIVE_AES_NONCE1);
buffer++;
writel(*buffer, cryp->base + STARFIVE_AES_NONCE2);
buffer++;
writel(*buffer, cryp->base + STARFIVE_AES_NONCE3);
buffer++;
}
if (starfive_aes_wait_gcmdone(cryp))
return dev_err_probe(cryp->dev, -ETIMEDOUT,
"Timeout processing gcm aad block");
return 0;
}
static int starfive_aes_ccm_write_adata(struct starfive_cryp_ctx *ctx)
{
struct starfive_cryp_dev *cryp = ctx->cryp;
struct starfive_cryp_request_ctx *rctx = ctx->rctx;
u32 *buffer;
u8 *ci;
int total_len, loop;
total_len = cryp->assoclen;
ci = rctx->adata;
writeb(*ci, cryp->base + STARFIVE_AES_AESDIO0R);
ci++;
writeb(*ci, cryp->base + STARFIVE_AES_AESDIO0R);
ci++;
total_len -= 2;
buffer = (u32 *)ci;
for (loop = 0; loop < 3; loop++, buffer++)
writel(*buffer, cryp->base + STARFIVE_AES_AESDIO0R);
total_len -= 12;
while (total_len > 0) {
for (loop = 0; loop < AES_BLOCK_32; loop++, buffer++)
writel(*buffer, cryp->base + STARFIVE_AES_AESDIO0R);
total_len -= AES_BLOCK_SIZE;
}
if (starfive_aes_wait_busy(cryp))
return dev_err_probe(cryp->dev, -ETIMEDOUT,
"Timeout processing ccm aad block");
return 0;
}
static int starfive_aes_prepare_req(struct skcipher_request *req,
struct aead_request *areq)
{
struct starfive_cryp_ctx *ctx;
struct starfive_cryp_request_ctx *rctx;
struct starfive_cryp_dev *cryp;
if (!req && !areq)
return -EINVAL;
ctx = req ? crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)) :
crypto_aead_ctx(crypto_aead_reqtfm(areq));
cryp = ctx->cryp;
rctx = req ? skcipher_request_ctx(req) : aead_request_ctx(areq);
if (req) {
cryp->req.sreq = req;
cryp->total_in = req->cryptlen;
cryp->total_out = req->cryptlen;
cryp->assoclen = 0;
cryp->authsize = 0;
} else {
cryp->req.areq = areq;
cryp->assoclen = areq->assoclen;
cryp->authsize = crypto_aead_authsize(crypto_aead_reqtfm(areq));
if (is_encrypt(cryp)) {
cryp->total_in = areq->cryptlen;
cryp->total_out = areq->cryptlen;
} else {
cryp->total_in = areq->cryptlen - cryp->authsize;
cryp->total_out = cryp->total_in;
}
}
rctx->in_sg = req ? req->src : areq->src;
scatterwalk_start(&cryp->in_walk, rctx->in_sg);
rctx->out_sg = req ? req->dst : areq->dst;
scatterwalk_start(&cryp->out_walk, rctx->out_sg);
if (cryp->assoclen) {
rctx->adata = kzalloc(ALIGN(cryp->assoclen, AES_BLOCK_SIZE), GFP_KERNEL);
if (!rctx->adata)
return dev_err_probe(cryp->dev, -ENOMEM,
"Failed to alloc memory for adata");
scatterwalk_copychunks(rctx->adata, &cryp->in_walk, cryp->assoclen, 0);
scatterwalk_copychunks(NULL, &cryp->out_walk, cryp->assoclen, 2);
}
ctx->rctx = rctx;
return starfive_aes_hw_init(ctx);
}
static int starfive_aes_do_one_req(struct crypto_engine *engine, void *areq)
{
struct skcipher_request *req =
container_of(areq, struct skcipher_request, base);
struct starfive_cryp_ctx *ctx =
crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
struct starfive_cryp_dev *cryp = ctx->cryp;
u32 block[AES_BLOCK_32];
u32 stat;
int err;
int i;
err = starfive_aes_prepare_req(req, NULL);
if (err)
return err;
/*
* Write first plain/ciphertext block to start the module
* then let irq tasklet handle the rest of the data blocks.
*/
scatterwalk_copychunks(block, &cryp->in_walk, min_t(size_t, AES_BLOCK_SIZE,
cryp->total_in), 0);
cryp->total_in -= min_t(size_t, AES_BLOCK_SIZE, cryp->total_in);
for (i = 0; i < AES_BLOCK_32; i++)
writel(block[i], cryp->base + STARFIVE_AES_AESDIO0R);
stat = readl(cryp->base + STARFIVE_IE_MASK_OFFSET);
stat &= ~STARFIVE_IE_MASK_AES_DONE;
writel(stat, cryp->base + STARFIVE_IE_MASK_OFFSET);
return 0;
}
static int starfive_aes_init_tfm(struct crypto_skcipher *tfm)
{
struct starfive_cryp_ctx *ctx = crypto_skcipher_ctx(tfm);
ctx->cryp = starfive_cryp_find_dev(ctx);
if (!ctx->cryp)
return -ENODEV;
crypto_skcipher_set_reqsize(tfm, sizeof(struct starfive_cryp_request_ctx) +
sizeof(struct skcipher_request));
ctx->enginectx.op.do_one_request = starfive_aes_do_one_req;
return 0;
}
static int starfive_aes_aead_do_one_req(struct crypto_engine *engine, void *areq)
{
struct aead_request *req =
container_of(areq, struct aead_request, base);
struct starfive_cryp_ctx *ctx =
crypto_aead_ctx(crypto_aead_reqtfm(req));
struct starfive_cryp_dev *cryp = ctx->cryp;
struct starfive_cryp_request_ctx *rctx = ctx->rctx;
u32 block[AES_BLOCK_32];
u32 stat;
int err;
int i;
err = starfive_aes_prepare_req(NULL, req);
if (err)
return err;
if (!cryp->assoclen)
goto write_text;
if ((cryp->flags & FLG_MODE_MASK) == STARFIVE_AES_MODE_CCM)
cryp->err = starfive_aes_ccm_write_adata(ctx);
else
cryp->err = starfive_aes_gcm_write_adata(ctx);
kfree(rctx->adata);
if (cryp->err)
return cryp->err;
write_text:
if (!cryp->total_in)
goto finish_req;
/*
* Write first plain/ciphertext block to start the module
* then let irq tasklet handle the rest of the data blocks.
*/
scatterwalk_copychunks(block, &cryp->in_walk, min_t(size_t, AES_BLOCK_SIZE,
cryp->total_in), 0);
cryp->total_in -= min_t(size_t, AES_BLOCK_SIZE, cryp->total_in);
for (i = 0; i < AES_BLOCK_32; i++)
writel(block[i], cryp->base + STARFIVE_AES_AESDIO0R);
stat = readl(cryp->base + STARFIVE_IE_MASK_OFFSET);
stat &= ~STARFIVE_IE_MASK_AES_DONE;
writel(stat, cryp->base + STARFIVE_IE_MASK_OFFSET);
return 0;
finish_req:
starfive_aes_finish_req(cryp);
return 0;
}
static int starfive_aes_aead_init_tfm(struct crypto_aead *tfm)
{
struct starfive_cryp_ctx *ctx = crypto_aead_ctx(tfm);
struct starfive_cryp_dev *cryp = ctx->cryp;
struct crypto_tfm *aead = crypto_aead_tfm(tfm);
struct crypto_alg *alg = aead->__crt_alg;
ctx->cryp = starfive_cryp_find_dev(ctx);
if (!ctx->cryp)
return -ENODEV;
if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
ctx->aead_fbk = crypto_alloc_aead(alg->cra_name, 0,
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->aead_fbk))
return dev_err_probe(cryp->dev, PTR_ERR(ctx->aead_fbk),
"%s() failed to allocate fallback for %s\n",
__func__, alg->cra_name);
}
crypto_aead_set_reqsize(tfm, sizeof(struct starfive_cryp_ctx) +
sizeof(struct aead_request));
ctx->enginectx.op.do_one_request = starfive_aes_aead_do_one_req;
return 0;
}
static void starfive_aes_aead_exit_tfm(struct crypto_aead *tfm)
{
struct starfive_cryp_ctx *ctx = crypto_aead_ctx(tfm);
crypto_free_aead(ctx->aead_fbk);
}
static int starfive_aes_crypt(struct skcipher_request *req, unsigned long flags)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct starfive_cryp_ctx *ctx = crypto_skcipher_ctx(tfm);
struct starfive_cryp_dev *cryp = ctx->cryp;
unsigned int blocksize_align = crypto_skcipher_blocksize(tfm) - 1;
cryp->flags = flags;
if ((cryp->flags & FLG_MODE_MASK) == STARFIVE_AES_MODE_ECB ||
(cryp->flags & FLG_MODE_MASK) == STARFIVE_AES_MODE_CBC)
if (req->cryptlen & blocksize_align)
return -EINVAL;
return crypto_transfer_skcipher_request_to_engine(cryp->engine, req);
}
static int starfive_aes_aead_crypt(struct aead_request *req, unsigned long flags)
{
struct starfive_cryp_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
struct starfive_cryp_dev *cryp = ctx->cryp;
cryp->flags = flags;
/*
* HW engine could not perform CCM tag verification on
* non-blocksize aligned text, use fallback algo instead
*/
if (ctx->aead_fbk && !is_encrypt(cryp)) {
struct aead_request *subreq = aead_request_ctx(req);
aead_request_set_tfm(subreq, ctx->aead_fbk);
aead_request_set_callback(subreq, req->base.flags,
req->base.complete, req->base.data);
aead_request_set_crypt(subreq, req->src,
req->dst, req->cryptlen, req->iv);
aead_request_set_ad(subreq, req->assoclen);
return crypto_aead_decrypt(subreq);
}
return crypto_transfer_aead_request_to_engine(cryp->engine, req);
}
static int starfive_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
unsigned int keylen)
{
struct starfive_cryp_ctx *ctx = crypto_skcipher_ctx(tfm);
if (!key || !keylen)
return -EINVAL;
if (keylen != AES_KEYSIZE_128 &&
keylen != AES_KEYSIZE_192 &&
keylen != AES_KEYSIZE_256)
return -EINVAL;
memcpy(ctx->key, key, keylen);
ctx->keylen = keylen;
return 0;
}
static int starfive_aes_aead_setkey(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen)
{
struct starfive_cryp_ctx *ctx = crypto_aead_ctx(tfm);
if (!key || !keylen)
return -EINVAL;
if (keylen != AES_KEYSIZE_128 &&
keylen != AES_KEYSIZE_192 &&
keylen != AES_KEYSIZE_256)
return -EINVAL;
memcpy(ctx->key, key, keylen);
ctx->keylen = keylen;
if (ctx->aead_fbk)
return crypto_aead_setkey(ctx->aead_fbk, key, keylen);
return 0;
}
static int starfive_aes_gcm_setauthsize(struct crypto_aead *tfm,
unsigned int authsize)
{
return crypto_gcm_check_authsize(authsize);
}
static int starfive_aes_ccm_setauthsize(struct crypto_aead *tfm,
unsigned int authsize)
{
struct starfive_cryp_ctx *ctx = crypto_aead_ctx(tfm);
switch (authsize) {
case 4:
case 6:
case 8:
case 10:
case 12:
case 14:
case 16:
break;
default:
return -EINVAL;
}
return crypto_aead_setauthsize(ctx->aead_fbk, authsize);
}
static int starfive_aes_ecb_encrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_ECB | FLG_ENCRYPT);
}
static int starfive_aes_ecb_decrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_ECB);
}
static int starfive_aes_cbc_encrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_CBC | FLG_ENCRYPT);
}
static int starfive_aes_cbc_decrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_CBC);
}
static int starfive_aes_cfb_encrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_CFB | FLG_ENCRYPT);
}
static int starfive_aes_cfb_decrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_CFB);
}
static int starfive_aes_ofb_encrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_OFB | FLG_ENCRYPT);
}
static int starfive_aes_ofb_decrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_OFB);
}
static int starfive_aes_ctr_encrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_CTR | FLG_ENCRYPT);
}
static int starfive_aes_ctr_decrypt(struct skcipher_request *req)
{
return starfive_aes_crypt(req, STARFIVE_AES_MODE_CTR);
}
static int starfive_aes_gcm_encrypt(struct aead_request *req)
{
return starfive_aes_aead_crypt(req, STARFIVE_AES_MODE_GCM | FLG_ENCRYPT);
}
static int starfive_aes_gcm_decrypt(struct aead_request *req)
{
return starfive_aes_aead_crypt(req, STARFIVE_AES_MODE_GCM);
}
static int starfive_aes_ccm_encrypt(struct aead_request *req)
{
int ret;
ret = starfive_aes_ccm_check_iv(req->iv);
if (ret)
return ret;
return starfive_aes_aead_crypt(req, STARFIVE_AES_MODE_CCM | FLG_ENCRYPT);
}
static int starfive_aes_ccm_decrypt(struct aead_request *req)
{
int ret;
ret = starfive_aes_ccm_check_iv(req->iv);
if (ret)
return ret;
return starfive_aes_aead_crypt(req, STARFIVE_AES_MODE_CCM);
}
static struct skcipher_alg skcipher_algs[] = {
{
.init = starfive_aes_init_tfm,
.setkey = starfive_aes_setkey,
.encrypt = starfive_aes_ecb_encrypt,
.decrypt = starfive_aes_ecb_decrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.base = {
.cra_name = "ecb(aes)",
.cra_driver_name = "starfive-ecb-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
}, {
.init = starfive_aes_init_tfm,
.setkey = starfive_aes_setkey,
.encrypt = starfive_aes_cbc_encrypt,
.decrypt = starfive_aes_cbc_decrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.base = {
.cra_name = "cbc(aes)",
.cra_driver_name = "starfive-cbc-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
}, {
.init = starfive_aes_init_tfm,
.setkey = starfive_aes_setkey,
.encrypt = starfive_aes_ctr_encrypt,
.decrypt = starfive_aes_ctr_decrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.base = {
.cra_name = "ctr(aes)",
.cra_driver_name = "starfive-ctr-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
}, {
.init = starfive_aes_init_tfm,
.setkey = starfive_aes_setkey,
.encrypt = starfive_aes_cfb_encrypt,
.decrypt = starfive_aes_cfb_decrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.base = {
.cra_name = "cfb(aes)",
.cra_driver_name = "starfive-cfb-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
}, {
.init = starfive_aes_init_tfm,
.setkey = starfive_aes_setkey,
.encrypt = starfive_aes_ofb_encrypt,
.decrypt = starfive_aes_ofb_decrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.base = {
.cra_name = "ofb(aes)",
.cra_driver_name = "starfive-ofb-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
},
};
static struct aead_alg aead_algs[] = {
{
.setkey = starfive_aes_aead_setkey,
.setauthsize = starfive_aes_gcm_setauthsize,
.encrypt = starfive_aes_gcm_encrypt,
.decrypt = starfive_aes_gcm_decrypt,
.init = starfive_aes_aead_init_tfm,
.exit = starfive_aes_aead_exit_tfm,
.ivsize = GCM_AES_IV_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
.base = {
.cra_name = "gcm(aes)",
.cra_driver_name = "starfive-gcm-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
}, {
.setkey = starfive_aes_aead_setkey,
.setauthsize = starfive_aes_ccm_setauthsize,
.encrypt = starfive_aes_ccm_encrypt,
.decrypt = starfive_aes_ccm_decrypt,
.init = starfive_aes_aead_init_tfm,
.exit = starfive_aes_aead_exit_tfm,
.ivsize = AES_BLOCK_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
.base = {
.cra_name = "ccm(aes)",
.cra_driver_name = "starfive-ccm-aes",
.cra_priority = 200,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct starfive_cryp_ctx),
.cra_alignmask = 0xf,
.cra_module = THIS_MODULE,
},
},
};
int starfive_aes_register_algs(void)
{
int ret;
ret = crypto_register_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
if (ret)
return ret;
ret = crypto_register_aeads(aead_algs, ARRAY_SIZE(aead_algs));
if (ret)
crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
return ret;
}
void starfive_aes_unregister_algs(void)
{
crypto_unregister_aeads(aead_algs, ARRAY_SIZE(aead_algs));
crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
}
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