[v5 PATCH 5/7] crypto: stm32 - Move hash state into separate structure
Herbert Xu
herbert at gondor.apana.org.au
Sun Mar 5 20:42:07 PST 2023
Create a new struct stm32_hash_state so that it may be exported
in future instead of the entire request context.
Signed-off-by: Herbert Xu <herbert at gondor.apana.org.au>
---
drivers/crypto/stm32/stm32-hash.c | 126 ++++++++++++++++++++------------------
1 file changed, 69 insertions(+), 57 deletions(-)
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index e35fee945371..de8275a80271 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -126,15 +126,24 @@ struct stm32_hash_ctx {
int keylen;
};
+struct stm32_hash_state {
+ u32 flags;
+
+ u16 bufcnt;
+ u16 buflen;
+
+ u8 buffer[HASH_BUFLEN] __aligned(4);
+
+ /* hash state */
+ u32 *hw_context;
+};
+
struct stm32_hash_request_ctx {
struct stm32_hash_dev *hdev;
- unsigned long flags;
unsigned long op;
u8 digest[SHA256_DIGEST_SIZE] __aligned(sizeof(u32));
size_t digcnt;
- size_t bufcnt;
- size_t buflen;
/* DMA */
struct scatterlist *sg;
@@ -148,10 +157,7 @@ struct stm32_hash_request_ctx {
u8 data_type;
- u8 buffer[HASH_BUFLEN] __aligned(sizeof(u32));
-
- /* Export Context */
- u32 *hw_context;
+ struct stm32_hash_state state;
};
struct stm32_hash_algs_info {
@@ -268,11 +274,12 @@ static void stm32_hash_write_ctrl(struct stm32_hash_dev *hdev, int bufcnt)
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(hdev->req);
struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct stm32_hash_state *state = &rctx->state;
u32 reg = HASH_CR_INIT;
if (!(hdev->flags & HASH_FLAGS_INIT)) {
- switch (rctx->flags & HASH_FLAGS_ALGO_MASK) {
+ switch (state->flags & HASH_FLAGS_ALGO_MASK) {
case HASH_FLAGS_MD5:
reg |= HASH_CR_ALGO_MD5;
break;
@@ -297,7 +304,7 @@ static void stm32_hash_write_ctrl(struct stm32_hash_dev *hdev, int bufcnt)
reg |= (rctx->data_type << HASH_CR_DATATYPE_POS);
- if (rctx->flags & HASH_FLAGS_HMAC) {
+ if (state->flags & HASH_FLAGS_HMAC) {
hdev->flags |= HASH_FLAGS_HMAC;
reg |= HASH_CR_MODE;
if (ctx->keylen > HASH_LONG_KEY)
@@ -324,11 +331,12 @@ static void stm32_hash_write_ctrl(struct stm32_hash_dev *hdev, int bufcnt)
static void stm32_hash_append_sg(struct stm32_hash_request_ctx *rctx)
{
+ struct stm32_hash_state *state = &rctx->state;
size_t count;
- while ((rctx->bufcnt < rctx->buflen) && rctx->total) {
+ while ((state->bufcnt < state->buflen) && rctx->total) {
count = min(rctx->sg->length - rctx->offset, rctx->total);
- count = min(count, rctx->buflen - rctx->bufcnt);
+ count = min_t(size_t, count, state->buflen - state->bufcnt);
if (count <= 0) {
if ((rctx->sg->length == 0) && !sg_is_last(rctx->sg)) {
@@ -339,10 +347,10 @@ static void stm32_hash_append_sg(struct stm32_hash_request_ctx *rctx)
}
}
- scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, rctx->sg,
- rctx->offset, count, 0);
+ scatterwalk_map_and_copy(state->buffer + state->bufcnt,
+ rctx->sg, rctx->offset, count, 0);
- rctx->bufcnt += count;
+ state->bufcnt += count;
rctx->offset += count;
rctx->total -= count;
@@ -411,18 +419,19 @@ static int stm32_hash_xmit_cpu(struct stm32_hash_dev *hdev,
static int stm32_hash_update_cpu(struct stm32_hash_dev *hdev)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ struct stm32_hash_state *state = &rctx->state;
int bufcnt, err = 0, final;
- dev_dbg(hdev->dev, "%s flags %lx\n", __func__, rctx->flags);
+ dev_dbg(hdev->dev, "%s flags %x\n", __func__, state->flags);
- final = rctx->flags & HASH_FLAGS_FINAL;
+ final = state->flags & HASH_FLAGS_FINAL;
- while ((rctx->total >= rctx->buflen) ||
- (rctx->bufcnt + rctx->total >= rctx->buflen)) {
+ while ((rctx->total >= state->buflen) ||
+ (state->bufcnt + rctx->total >= state->buflen)) {
stm32_hash_append_sg(rctx);
- bufcnt = rctx->bufcnt;
- rctx->bufcnt = 0;
- err = stm32_hash_xmit_cpu(hdev, rctx->buffer, bufcnt, 0);
+ bufcnt = state->bufcnt;
+ state->bufcnt = 0;
+ err = stm32_hash_xmit_cpu(hdev, state->buffer, bufcnt, 0);
if (err)
return err;
}
@@ -430,9 +439,9 @@ static int stm32_hash_update_cpu(struct stm32_hash_dev *hdev)
stm32_hash_append_sg(rctx);
if (final) {
- bufcnt = rctx->bufcnt;
- rctx->bufcnt = 0;
- err = stm32_hash_xmit_cpu(hdev, rctx->buffer, bufcnt, 1);
+ bufcnt = state->bufcnt;
+ state->bufcnt = 0;
+ err = stm32_hash_xmit_cpu(hdev, state->buffer, bufcnt, 1);
}
return err;
@@ -576,10 +585,10 @@ static int stm32_hash_dma_init(struct stm32_hash_dev *hdev)
static int stm32_hash_dma_send(struct stm32_hash_dev *hdev)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ u32 *buffer = (void *)rctx->state.buffer;
struct scatterlist sg[1], *tsg;
int err = 0, len = 0, reg, ncp = 0;
unsigned int i;
- u32 *buffer = (void *)rctx->buffer;
rctx->sg = hdev->req->src;
rctx->total = hdev->req->nbytes;
@@ -607,7 +616,7 @@ static int stm32_hash_dma_send(struct stm32_hash_dev *hdev)
ncp = sg_pcopy_to_buffer(
rctx->sg, rctx->nents,
- rctx->buffer, sg->length - len,
+ rctx->state.buffer, sg->length - len,
rctx->total - sg->length + len);
sg->length = len;
@@ -718,41 +727,40 @@ static int stm32_hash_init(struct ahash_request *req)
struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ struct stm32_hash_state *state = &rctx->state;
rctx->hdev = hdev;
- rctx->flags = HASH_FLAGS_CPU;
+ state->flags = HASH_FLAGS_CPU;
rctx->digcnt = crypto_ahash_digestsize(tfm);
switch (rctx->digcnt) {
case MD5_DIGEST_SIZE:
- rctx->flags |= HASH_FLAGS_MD5;
+ state->flags |= HASH_FLAGS_MD5;
break;
case SHA1_DIGEST_SIZE:
- rctx->flags |= HASH_FLAGS_SHA1;
+ state->flags |= HASH_FLAGS_SHA1;
break;
case SHA224_DIGEST_SIZE:
- rctx->flags |= HASH_FLAGS_SHA224;
+ state->flags |= HASH_FLAGS_SHA224;
break;
case SHA256_DIGEST_SIZE:
- rctx->flags |= HASH_FLAGS_SHA256;
+ state->flags |= HASH_FLAGS_SHA256;
break;
default:
return -EINVAL;
}
- rctx->bufcnt = 0;
- rctx->buflen = HASH_BUFLEN;
+ rctx->state.bufcnt = 0;
+ rctx->state.buflen = HASH_BUFLEN;
rctx->total = 0;
rctx->offset = 0;
rctx->data_type = HASH_DATA_8_BITS;
- memset(rctx->buffer, 0, HASH_BUFLEN);
-
if (ctx->flags & HASH_FLAGS_HMAC)
- rctx->flags |= HASH_FLAGS_HMAC;
+ state->flags |= HASH_FLAGS_HMAC;
- dev_dbg(hdev->dev, "%s Flags %lx\n", __func__, rctx->flags);
+ dev_dbg(hdev->dev, "%s Flags %x\n", __func__, state->flags);
return 0;
}
@@ -760,8 +768,9 @@ static int stm32_hash_init(struct ahash_request *req)
static int stm32_hash_update_req(struct stm32_hash_dev *hdev)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ struct stm32_hash_state *state = &rctx->state;
- if (!(rctx->flags & HASH_FLAGS_CPU))
+ if (!(state->flags & HASH_FLAGS_CPU))
return stm32_hash_dma_send(hdev);
return stm32_hash_update_cpu(hdev);
@@ -771,14 +780,12 @@ static int stm32_hash_final_req(struct stm32_hash_dev *hdev)
{
struct ahash_request *req = hdev->req;
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
- int buflen = rctx->bufcnt;
+ struct stm32_hash_state *state = &rctx->state;
- if (rctx->flags & HASH_FLAGS_FINUP)
+ if (state->flags & HASH_FLAGS_FINUP)
return stm32_hash_update_req(hdev);
- rctx->bufcnt = 0;
-
- return stm32_hash_xmit_cpu(hdev, rctx->buffer, buflen, 1);
+ return stm32_hash_xmit_cpu(hdev, state->buffer, state->buflen, 1);
}
static void stm32_hash_emptymsg_fallback(struct ahash_request *req)
@@ -813,6 +820,7 @@ static void stm32_hash_emptymsg_fallback(struct ahash_request *req)
static void stm32_hash_copy_hash(struct ahash_request *req)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_state *state = &rctx->state;
struct stm32_hash_dev *hdev = rctx->hdev;
__be32 *hash = (void *)rctx->digest;
unsigned int i, hashsize;
@@ -820,7 +828,7 @@ static void stm32_hash_copy_hash(struct ahash_request *req)
if (hdev->pdata->broken_emptymsg && !req->nbytes)
return stm32_hash_emptymsg_fallback(req);
- switch (rctx->flags & HASH_FLAGS_ALGO_MASK) {
+ switch (state->flags & HASH_FLAGS_ALGO_MASK) {
case HASH_FLAGS_MD5:
hashsize = MD5_DIGEST_SIZE;
break;
@@ -862,6 +870,7 @@ static int stm32_hash_finish(struct ahash_request *req)
static void stm32_hash_finish_req(struct ahash_request *req, int err)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_state *state = &rctx->state;
struct stm32_hash_dev *hdev = rctx->hdev;
if (!err && (HASH_FLAGS_FINAL & hdev->flags)) {
@@ -873,7 +882,7 @@ static void stm32_hash_finish_req(struct ahash_request *req, int err)
HASH_FLAGS_HMAC_INIT | HASH_FLAGS_HMAC_FINAL |
HASH_FLAGS_HMAC_KEY);
} else {
- rctx->flags |= HASH_FLAGS_ERRORS;
+ state->flags |= HASH_FLAGS_ERRORS;
}
pm_runtime_mark_last_busy(hdev->dev);
@@ -979,15 +988,16 @@ static int stm32_hash_enqueue(struct ahash_request *req, unsigned int op)
static int stm32_hash_update(struct ahash_request *req)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_state *state = &rctx->state;
- if (!req->nbytes || !(rctx->flags & HASH_FLAGS_CPU))
+ if (!req->nbytes || !(state->flags & HASH_FLAGS_CPU))
return 0;
rctx->total = req->nbytes;
rctx->sg = req->src;
rctx->offset = 0;
- if ((rctx->bufcnt + rctx->total < rctx->buflen)) {
+ if ((state->bufcnt + rctx->total < state->buflen)) {
stm32_hash_append_sg(rctx);
return 0;
}
@@ -998,8 +1008,9 @@ static int stm32_hash_update(struct ahash_request *req)
static int stm32_hash_final(struct ahash_request *req)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_state *state = &rctx->state;
- rctx->flags |= HASH_FLAGS_FINAL;
+ state->flags |= HASH_FLAGS_FINAL;
return stm32_hash_enqueue(req, HASH_OP_FINAL);
}
@@ -1009,17 +1020,18 @@ static int stm32_hash_finup(struct ahash_request *req)
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ struct stm32_hash_state *state = &rctx->state;
if (!req->nbytes)
goto out;
- rctx->flags |= HASH_FLAGS_FINUP;
+ state->flags |= HASH_FLAGS_FINUP;
rctx->total = req->nbytes;
rctx->sg = req->src;
rctx->offset = 0;
if (hdev->dma_lch && stm32_hash_dma_aligned_data(req))
- rctx->flags &= ~HASH_FLAGS_CPU;
+ state->flags &= ~HASH_FLAGS_CPU;
out:
return stm32_hash_final(req);
@@ -1035,6 +1047,7 @@ static int stm32_hash_export(struct ahash_request *req, void *out)
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ struct stm32_hash_state *state = &rctx->state;
u32 *preg;
unsigned int i;
int ret;
@@ -1045,11 +1058,9 @@ static int stm32_hash_export(struct ahash_request *req, void *out)
if (ret)
return ret;
- rctx->hw_context = kmalloc_array(3 + HASH_CSR_REGISTER_NUMBER,
- sizeof(u32),
- GFP_KERNEL);
-
- preg = rctx->hw_context;
+ state->hw_context = kmalloc_array(3 + HASH_CSR_REGISTER_NUMBER,
+ sizeof(u32), GFP_KERNEL);
+ preg = state->hw_context;
if (!hdev->pdata->ux500)
*preg++ = stm32_hash_read(hdev, HASH_IMR);
@@ -1071,13 +1082,14 @@ static int stm32_hash_import(struct ahash_request *req, const void *in)
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ struct stm32_hash_state *state = &rctx->state;
const u32 *preg = in;
u32 reg;
unsigned int i;
memcpy(rctx, in, sizeof(*rctx));
- preg = rctx->hw_context;
+ preg = state->hw_context;
pm_runtime_get_sync(hdev->dev);
@@ -1094,7 +1106,7 @@ static int stm32_hash_import(struct ahash_request *req, const void *in)
pm_runtime_mark_last_busy(hdev->dev);
pm_runtime_put_autosuspend(hdev->dev);
- kfree(rctx->hw_context);
+ kfree(state->hw_context);
return 0;
}
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