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-rw-r--r--drivers/crypto/stm32/stm32-hash.c570
1 files changed, 448 insertions, 122 deletions
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index 34e0d7e381..351827372e 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -94,6 +94,7 @@
#define HASH_FLAGS_ERRORS BIT(21)
#define HASH_FLAGS_EMPTY BIT(22)
#define HASH_FLAGS_HMAC BIT(23)
+#define HASH_FLAGS_SGS_COPIED BIT(24)
#define HASH_OP_UPDATE 1
#define HASH_OP_FINAL 2
@@ -145,7 +146,7 @@ struct stm32_hash_state {
u16 bufcnt;
u16 blocklen;
- u8 buffer[HASH_BUFLEN] __aligned(4);
+ u8 buffer[HASH_BUFLEN] __aligned(sizeof(u32));
/* hash state */
u32 hw_context[3 + HASH_CSR_NB_MAX];
@@ -158,8 +159,8 @@ struct stm32_hash_request_ctx {
u8 digest[SHA512_DIGEST_SIZE] __aligned(sizeof(u32));
size_t digcnt;
- /* DMA */
struct scatterlist *sg;
+ struct scatterlist sgl[2]; /* scatterlist used to realize alignment */
unsigned int offset;
unsigned int total;
struct scatterlist sg_key;
@@ -184,6 +185,7 @@ struct stm32_hash_pdata {
size_t algs_info_size;
bool has_sr;
bool has_mdmat;
+ bool context_secured;
bool broken_emptymsg;
bool ux500;
};
@@ -195,6 +197,7 @@ struct stm32_hash_dev {
struct reset_control *rst;
void __iomem *io_base;
phys_addr_t phys_base;
+ u8 xmit_buf[HASH_BUFLEN] __aligned(sizeof(u32));
u32 dma_mode;
bool polled;
@@ -220,6 +223,8 @@ static struct stm32_hash_drv stm32_hash = {
};
static void stm32_hash_dma_callback(void *param);
+static int stm32_hash_prepare_request(struct ahash_request *req);
+static void stm32_hash_unprepare_request(struct ahash_request *req);
static inline u32 stm32_hash_read(struct stm32_hash_dev *hdev, u32 offset)
{
@@ -232,6 +237,11 @@ static inline void stm32_hash_write(struct stm32_hash_dev *hdev,
writel_relaxed(value, hdev->io_base + offset);
}
+/**
+ * stm32_hash_wait_busy - wait until hash processor is available. It return an
+ * error if the hash core is processing a block of data for more than 10 ms.
+ * @hdev: the stm32_hash_dev device.
+ */
static inline int stm32_hash_wait_busy(struct stm32_hash_dev *hdev)
{
u32 status;
@@ -245,6 +255,11 @@ static inline int stm32_hash_wait_busy(struct stm32_hash_dev *hdev)
!(status & HASH_SR_BUSY), 10, 10000);
}
+/**
+ * stm32_hash_set_nblw - set the number of valid bytes in the last word.
+ * @hdev: the stm32_hash_dev device.
+ * @length: the length of the final word.
+ */
static void stm32_hash_set_nblw(struct stm32_hash_dev *hdev, int length)
{
u32 reg;
@@ -282,6 +297,11 @@ static int stm32_hash_write_key(struct stm32_hash_dev *hdev)
return 0;
}
+/**
+ * stm32_hash_write_ctrl - Initialize the hash processor, only if
+ * HASH_FLAGS_INIT is set.
+ * @hdev: the stm32_hash_dev device
+ */
static void stm32_hash_write_ctrl(struct stm32_hash_dev *hdev)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
@@ -469,9 +489,7 @@ 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;
- u32 *preg = state->hw_context;
int bufcnt, err = 0, final;
- int i, swap_reg;
dev_dbg(hdev->dev, "%s flags %x\n", __func__, state->flags);
@@ -495,34 +513,23 @@ static int stm32_hash_update_cpu(struct stm32_hash_dev *hdev)
return stm32_hash_xmit_cpu(hdev, state->buffer, bufcnt, 1);
}
- if (!(hdev->flags & HASH_FLAGS_INIT))
- return 0;
-
- if (stm32_hash_wait_busy(hdev))
- return -ETIMEDOUT;
-
- swap_reg = hash_swap_reg(rctx);
-
- if (!hdev->pdata->ux500)
- *preg++ = stm32_hash_read(hdev, HASH_IMR);
- *preg++ = stm32_hash_read(hdev, HASH_STR);
- *preg++ = stm32_hash_read(hdev, HASH_CR);
- for (i = 0; i < swap_reg; i++)
- *preg++ = stm32_hash_read(hdev, HASH_CSR(i));
-
- state->flags |= HASH_FLAGS_INIT;
-
return err;
}
static int stm32_hash_xmit_dma(struct stm32_hash_dev *hdev,
- struct scatterlist *sg, int length, int mdma)
+ struct scatterlist *sg, int length, int mdmat)
{
struct dma_async_tx_descriptor *in_desc;
dma_cookie_t cookie;
u32 reg;
int err;
+ dev_dbg(hdev->dev, "%s mdmat: %x length: %d\n", __func__, mdmat, length);
+
+ /* do not use dma if there is no data to send */
+ if (length <= 0)
+ return 0;
+
in_desc = dmaengine_prep_slave_sg(hdev->dma_lch, sg, 1,
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT |
DMA_CTRL_ACK);
@@ -535,13 +542,12 @@ static int stm32_hash_xmit_dma(struct stm32_hash_dev *hdev,
in_desc->callback = stm32_hash_dma_callback;
in_desc->callback_param = hdev;
- hdev->flags |= HASH_FLAGS_FINAL;
hdev->flags |= HASH_FLAGS_DMA_ACTIVE;
reg = stm32_hash_read(hdev, HASH_CR);
if (hdev->pdata->has_mdmat) {
- if (mdma)
+ if (mdmat)
reg |= HASH_CR_MDMAT;
else
reg &= ~HASH_CR_MDMAT;
@@ -550,7 +556,6 @@ static int stm32_hash_xmit_dma(struct stm32_hash_dev *hdev,
stm32_hash_write(hdev, HASH_CR, reg);
- stm32_hash_set_nblw(hdev, length);
cookie = dmaengine_submit(in_desc);
err = dma_submit_error(cookie);
@@ -590,7 +595,7 @@ static int stm32_hash_hmac_dma_send(struct stm32_hash_dev *hdev)
struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
int err;
- if (ctx->keylen < rctx->state.blocklen || hdev->dma_mode == 1) {
+ if (ctx->keylen < rctx->state.blocklen || hdev->dma_mode > 0) {
err = stm32_hash_write_key(hdev);
if (stm32_hash_wait_busy(hdev))
return -ETIMEDOUT;
@@ -655,18 +660,20 @@ static int stm32_hash_dma_send(struct stm32_hash_dev *hdev)
struct scatterlist sg[1], *tsg;
int err = 0, reg, ncp = 0;
unsigned int i, len = 0, bufcnt = 0;
+ bool final = hdev->flags & HASH_FLAGS_FINAL;
bool is_last = false;
+ u32 last_word;
- rctx->sg = hdev->req->src;
- rctx->total = hdev->req->nbytes;
+ dev_dbg(hdev->dev, "%s total: %d bufcnt: %d final: %d\n",
+ __func__, rctx->total, rctx->state.bufcnt, final);
- rctx->nents = sg_nents(rctx->sg);
if (rctx->nents < 0)
return -EINVAL;
stm32_hash_write_ctrl(hdev);
- if (hdev->flags & HASH_FLAGS_HMAC) {
+ if (hdev->flags & HASH_FLAGS_HMAC && (!(hdev->flags & HASH_FLAGS_HMAC_KEY))) {
+ hdev->flags |= HASH_FLAGS_HMAC_KEY;
err = stm32_hash_hmac_dma_send(hdev);
if (err != -EINPROGRESS)
return err;
@@ -677,22 +684,36 @@ static int stm32_hash_dma_send(struct stm32_hash_dev *hdev)
len = sg->length;
if (sg_is_last(sg) || (bufcnt + sg[0].length) >= rctx->total) {
- sg->length = rctx->total - bufcnt;
- is_last = true;
- if (hdev->dma_mode == 1) {
- len = (ALIGN(sg->length, 16) - 16);
-
- ncp = sg_pcopy_to_buffer(
- rctx->sg, rctx->nents,
- rctx->state.buffer, sg->length - len,
- rctx->total - sg->length + len);
-
- sg->length = len;
+ if (!final) {
+ /* Always manually put the last word of a non-final transfer. */
+ len -= sizeof(u32);
+ sg_pcopy_to_buffer(rctx->sg, rctx->nents, &last_word, 4, len);
+ sg->length -= sizeof(u32);
} else {
- if (!(IS_ALIGNED(sg->length, sizeof(u32)))) {
- len = sg->length;
- sg->length = ALIGN(sg->length,
- sizeof(u32));
+ /*
+ * In Multiple DMA mode, DMA must be aborted before the final
+ * transfer.
+ */
+ sg->length = rctx->total - bufcnt;
+ if (hdev->dma_mode > 0) {
+ len = (ALIGN(sg->length, 16) - 16);
+
+ ncp = sg_pcopy_to_buffer(rctx->sg, rctx->nents,
+ rctx->state.buffer,
+ sg->length - len,
+ rctx->total - sg->length + len);
+
+ if (!len)
+ break;
+
+ sg->length = len;
+ } else {
+ is_last = true;
+ if (!(IS_ALIGNED(sg->length, sizeof(u32)))) {
+ len = sg->length;
+ sg->length = ALIGN(sg->length,
+ sizeof(u32));
+ }
}
}
}
@@ -706,43 +727,67 @@ static int stm32_hash_dma_send(struct stm32_hash_dev *hdev)
err = stm32_hash_xmit_dma(hdev, sg, len, !is_last);
+ /* The last word of a non final transfer is sent manually. */
+ if (!final) {
+ stm32_hash_write(hdev, HASH_DIN, last_word);
+ len += sizeof(u32);
+ }
+
+ rctx->total -= len;
+
bufcnt += sg[0].length;
dma_unmap_sg(hdev->dev, sg, 1, DMA_TO_DEVICE);
- if (err == -ENOMEM)
+ if (err == -ENOMEM || err == -ETIMEDOUT)
return err;
if (is_last)
break;
}
- if (hdev->dma_mode == 1) {
- if (stm32_hash_wait_busy(hdev))
- return -ETIMEDOUT;
- reg = stm32_hash_read(hdev, HASH_CR);
- reg &= ~HASH_CR_DMAE;
- reg |= HASH_CR_DMAA;
- stm32_hash_write(hdev, HASH_CR, reg);
+ /*
+ * When the second last block transfer of 4 words is performed by the DMA,
+ * the software must set the DMA Abort bit (DMAA) to 1 before completing the
+ * last transfer of 4 words or less.
+ */
+ if (final) {
+ if (hdev->dma_mode > 0) {
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ reg = stm32_hash_read(hdev, HASH_CR);
+ reg &= ~HASH_CR_DMAE;
+ reg |= HASH_CR_DMAA;
+ stm32_hash_write(hdev, HASH_CR, reg);
+
+ if (ncp) {
+ memset(buffer + ncp, 0, 4 - DIV_ROUND_UP(ncp, sizeof(u32)));
+ writesl(hdev->io_base + HASH_DIN, buffer,
+ DIV_ROUND_UP(ncp, sizeof(u32)));
+ }
- if (ncp) {
- memset(buffer + ncp, 0,
- DIV_ROUND_UP(ncp, sizeof(u32)) - ncp);
- writesl(hdev->io_base + HASH_DIN, buffer,
- DIV_ROUND_UP(ncp, sizeof(u32)));
+ stm32_hash_set_nblw(hdev, ncp);
+ reg = stm32_hash_read(hdev, HASH_STR);
+ reg |= HASH_STR_DCAL;
+ stm32_hash_write(hdev, HASH_STR, reg);
+ err = -EINPROGRESS;
}
- stm32_hash_set_nblw(hdev, ncp);
- reg = stm32_hash_read(hdev, HASH_STR);
- reg |= HASH_STR_DCAL;
- stm32_hash_write(hdev, HASH_STR, reg);
- err = -EINPROGRESS;
- }
- if (hdev->flags & HASH_FLAGS_HMAC) {
- if (stm32_hash_wait_busy(hdev))
- return -ETIMEDOUT;
- err = stm32_hash_hmac_dma_send(hdev);
+ /*
+ * The hash processor needs the key to be loaded a second time in order
+ * to process the HMAC.
+ */
+ if (hdev->flags & HASH_FLAGS_HMAC) {
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ err = stm32_hash_hmac_dma_send(hdev);
+ }
+
+ return err;
}
- return err;
+ if (err != -EINPROGRESS)
+ return err;
+
+ return 0;
}
static struct stm32_hash_dev *stm32_hash_find_dev(struct stm32_hash_ctx *ctx)
@@ -765,33 +810,6 @@ static struct stm32_hash_dev *stm32_hash_find_dev(struct stm32_hash_ctx *ctx)
return hdev;
}
-static bool stm32_hash_dma_aligned_data(struct ahash_request *req)
-{
- struct scatterlist *sg;
- 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);
- int i;
-
- if (!hdev->dma_lch || req->nbytes <= rctx->state.blocklen)
- return false;
-
- if (sg_nents(req->src) > 1) {
- if (hdev->dma_mode == 1)
- return false;
- for_each_sg(req->src, sg, sg_nents(req->src), i) {
- if ((!IS_ALIGNED(sg->length, sizeof(u32))) &&
- (!sg_is_last(sg)))
- return false;
- }
- }
-
- if (req->src->offset % 4)
- return false;
-
- return true;
-}
-
static int stm32_hash_init(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
@@ -802,8 +820,10 @@ static int stm32_hash_init(struct ahash_request *req)
bool sha3_mode = ctx->flags & HASH_FLAGS_SHA3_MODE;
rctx->hdev = hdev;
+ state->flags = 0;
- state->flags = HASH_FLAGS_CPU;
+ if (!(hdev->dma_lch && hdev->pdata->has_mdmat))
+ state->flags |= HASH_FLAGS_CPU;
if (sha3_mode)
state->flags |= HASH_FLAGS_SHA3_MODE;
@@ -857,6 +877,7 @@ static int stm32_hash_init(struct ahash_request *req)
dev_err(hdev->dev, "Error, block too large");
return -EINVAL;
}
+ rctx->nents = 0;
rctx->total = 0;
rctx->offset = 0;
rctx->data_type = HASH_DATA_8_BITS;
@@ -874,6 +895,9 @@ 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;
+ dev_dbg(hdev->dev, "update_req: total: %u, digcnt: %zd, final: 0",
+ rctx->total, rctx->digcnt);
+
if (!(state->flags & HASH_FLAGS_CPU))
return stm32_hash_dma_send(hdev);
@@ -887,6 +911,11 @@ static int stm32_hash_final_req(struct stm32_hash_dev *hdev)
struct stm32_hash_state *state = &rctx->state;
int buflen = state->bufcnt;
+ if (!(state->flags & HASH_FLAGS_CPU)) {
+ hdev->flags |= HASH_FLAGS_FINAL;
+ return stm32_hash_dma_send(hdev);
+ }
+
if (state->flags & HASH_FLAGS_FINUP)
return stm32_hash_update_req(hdev);
@@ -968,15 +997,21 @@ 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 (hdev->flags & HASH_FLAGS_DMA_ACTIVE)
+ state->flags |= HASH_FLAGS_DMA_ACTIVE;
+ else
+ state->flags &= ~HASH_FLAGS_DMA_ACTIVE;
+
if (!err && (HASH_FLAGS_FINAL & hdev->flags)) {
stm32_hash_copy_hash(req);
err = stm32_hash_finish(req);
}
- pm_runtime_mark_last_busy(hdev->dev);
- pm_runtime_put_autosuspend(hdev->dev);
+ /* Finalized request mist be unprepared here */
+ stm32_hash_unprepare_request(req);
crypto_finalize_hash_request(hdev->engine, req, err);
}
@@ -1006,6 +1041,10 @@ static int stm32_hash_one_request(struct crypto_engine *engine, void *areq)
pm_runtime_get_sync(hdev->dev);
+ err = stm32_hash_prepare_request(req);
+ if (err)
+ return err;
+
hdev->req = req;
hdev->flags = 0;
swap_reg = hash_swap_reg(rctx);
@@ -1030,6 +1069,12 @@ static int stm32_hash_one_request(struct crypto_engine *engine, void *areq)
if (state->flags & HASH_FLAGS_HMAC)
hdev->flags |= HASH_FLAGS_HMAC |
HASH_FLAGS_HMAC_KEY;
+
+ if (state->flags & HASH_FLAGS_CPU)
+ hdev->flags |= HASH_FLAGS_CPU;
+
+ if (state->flags & HASH_FLAGS_DMA_ACTIVE)
+ hdev->flags |= HASH_FLAGS_DMA_ACTIVE;
}
if (rctx->op == HASH_OP_UPDATE)
@@ -1054,6 +1099,284 @@ static int stm32_hash_one_request(struct crypto_engine *engine, void *areq)
return 0;
}
+static int stm32_hash_copy_sgs(struct stm32_hash_request_ctx *rctx,
+ struct scatterlist *sg, int bs,
+ unsigned int new_len)
+{
+ struct stm32_hash_state *state = &rctx->state;
+ int pages;
+ void *buf;
+
+ pages = get_order(new_len);
+
+ buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
+ if (!buf) {
+ pr_err("Couldn't allocate pages for unaligned cases.\n");
+ return -ENOMEM;
+ }
+
+ if (state->bufcnt)
+ memcpy(buf, rctx->hdev->xmit_buf, state->bufcnt);
+
+ scatterwalk_map_and_copy(buf + state->bufcnt, sg, rctx->offset,
+ min(new_len, rctx->total) - state->bufcnt, 0);
+ sg_init_table(rctx->sgl, 1);
+ sg_set_buf(rctx->sgl, buf, new_len);
+ rctx->sg = rctx->sgl;
+ state->flags |= HASH_FLAGS_SGS_COPIED;
+ rctx->nents = 1;
+ rctx->offset += new_len - state->bufcnt;
+ state->bufcnt = 0;
+ rctx->total = new_len;
+
+ return 0;
+}
+
+static int stm32_hash_align_sgs(struct scatterlist *sg,
+ int nbytes, int bs, bool init, bool final,
+ struct stm32_hash_request_ctx *rctx)
+{
+ struct stm32_hash_state *state = &rctx->state;
+ struct stm32_hash_dev *hdev = rctx->hdev;
+ struct scatterlist *sg_tmp = sg;
+ int offset = rctx->offset;
+ int new_len;
+ int n = 0;
+ int bufcnt = state->bufcnt;
+ bool secure_ctx = hdev->pdata->context_secured;
+ bool aligned = true;
+
+ if (!sg || !sg->length || !nbytes) {
+ if (bufcnt) {
+ bufcnt = DIV_ROUND_UP(bufcnt, bs) * bs;
+ sg_init_table(rctx->sgl, 1);
+ sg_set_buf(rctx->sgl, rctx->hdev->xmit_buf, bufcnt);
+ rctx->sg = rctx->sgl;
+ rctx->nents = 1;
+ }
+
+ return 0;
+ }
+
+ new_len = nbytes;
+
+ if (offset)
+ aligned = false;
+
+ if (final) {
+ new_len = DIV_ROUND_UP(new_len, bs) * bs;
+ } else {
+ new_len = (new_len - 1) / bs * bs; // return n block - 1 block
+
+ /*
+ * Context save in some version of HASH IP can only be done when the
+ * FIFO is ready to get a new block. This implies to send n block plus a
+ * 32 bit word in the first DMA send.
+ */
+ if (init && secure_ctx) {
+ new_len += sizeof(u32);
+ if (unlikely(new_len > nbytes))
+ new_len -= bs;
+ }
+ }
+
+ if (!new_len)
+ return 0;
+
+ if (nbytes != new_len)
+ aligned = false;
+
+ while (nbytes > 0 && sg_tmp) {
+ n++;
+
+ if (bufcnt) {
+ if (!IS_ALIGNED(bufcnt, bs)) {
+ aligned = false;
+ break;
+ }
+ nbytes -= bufcnt;
+ bufcnt = 0;
+ if (!nbytes)
+ aligned = false;
+
+ continue;
+ }
+
+ if (offset < sg_tmp->length) {
+ if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) {
+ aligned = false;
+ break;
+ }
+
+ if (!IS_ALIGNED(sg_tmp->length - offset, bs)) {
+ aligned = false;
+ break;
+ }
+ }
+
+ if (offset) {
+ offset -= sg_tmp->length;
+ if (offset < 0) {
+ nbytes += offset;
+ offset = 0;
+ }
+ } else {
+ nbytes -= sg_tmp->length;
+ }
+
+ sg_tmp = sg_next(sg_tmp);
+
+ if (nbytes < 0) {
+ aligned = false;
+ break;
+ }
+ }
+
+ if (!aligned)
+ return stm32_hash_copy_sgs(rctx, sg, bs, new_len);
+
+ rctx->total = new_len;
+ rctx->offset += new_len;
+ rctx->nents = n;
+ if (state->bufcnt) {
+ sg_init_table(rctx->sgl, 2);
+ sg_set_buf(rctx->sgl, rctx->hdev->xmit_buf, state->bufcnt);
+ sg_chain(rctx->sgl, 2, sg);
+ rctx->sg = rctx->sgl;
+ } else {
+ rctx->sg = sg;
+ }
+
+ return 0;
+}
+
+static int stm32_hash_prepare_request(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(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;
+ unsigned int nbytes;
+ int ret, hash_later, bs;
+ bool update = rctx->op & HASH_OP_UPDATE;
+ bool init = !(state->flags & HASH_FLAGS_INIT);
+ bool finup = state->flags & HASH_FLAGS_FINUP;
+ bool final = state->flags & HASH_FLAGS_FINAL;
+
+ if (!hdev->dma_lch || state->flags & HASH_FLAGS_CPU)
+ return 0;
+
+ bs = crypto_ahash_blocksize(tfm);
+
+ nbytes = state->bufcnt;
+
+ /*
+ * In case of update request nbytes must correspond to the content of the
+ * buffer + the offset minus the content of the request already in the
+ * buffer.
+ */
+ if (update || finup)
+ nbytes += req->nbytes - rctx->offset;
+
+ dev_dbg(hdev->dev,
+ "%s: nbytes=%d, bs=%d, total=%d, offset=%d, bufcnt=%d\n",
+ __func__, nbytes, bs, rctx->total, rctx->offset, state->bufcnt);
+
+ if (!nbytes)
+ return 0;
+
+ rctx->total = nbytes;
+
+ if (update && req->nbytes && (!IS_ALIGNED(state->bufcnt, bs))) {
+ int len = bs - state->bufcnt % bs;
+
+ if (len > req->nbytes)
+ len = req->nbytes;
+ scatterwalk_map_and_copy(state->buffer + state->bufcnt, req->src,
+ 0, len, 0);
+ state->bufcnt += len;
+ rctx->offset = len;
+ }
+
+ /* copy buffer in a temporary one that is used for sg alignment */
+ if (state->bufcnt)
+ memcpy(hdev->xmit_buf, state->buffer, state->bufcnt);
+
+ ret = stm32_hash_align_sgs(req->src, nbytes, bs, init, final, rctx);
+ if (ret)
+ return ret;
+
+ hash_later = nbytes - rctx->total;
+ if (hash_later < 0)
+ hash_later = 0;
+
+ if (hash_later && hash_later <= state->blocklen) {
+ scatterwalk_map_and_copy(state->buffer,
+ req->src,
+ req->nbytes - hash_later,
+ hash_later, 0);
+
+ state->bufcnt = hash_later;
+ } else {
+ state->bufcnt = 0;
+ }
+
+ if (hash_later > state->blocklen) {
+ /* FIXME: add support of this case */
+ pr_err("Buffer contains more than one block.\n");
+ return -ENOMEM;
+ }
+
+ rctx->total = min(nbytes, rctx->total);
+
+ return 0;
+}
+
+static void stm32_hash_unprepare_request(struct ahash_request *req)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_state *state = &rctx->state;
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ u32 *preg = state->hw_context;
+ int swap_reg, i;
+
+ if (hdev->dma_lch)
+ dmaengine_terminate_sync(hdev->dma_lch);
+
+ if (state->flags & HASH_FLAGS_SGS_COPIED)
+ free_pages((unsigned long)sg_virt(rctx->sg), get_order(rctx->sg->length));
+
+ rctx->sg = NULL;
+ rctx->offset = 0;
+
+ state->flags &= ~(HASH_FLAGS_SGS_COPIED);
+
+ if (!(hdev->flags & HASH_FLAGS_INIT))
+ goto pm_runtime;
+
+ state->flags |= HASH_FLAGS_INIT;
+
+ if (stm32_hash_wait_busy(hdev)) {
+ dev_warn(hdev->dev, "Wait busy failed.");
+ return;
+ }
+
+ swap_reg = hash_swap_reg(rctx);
+
+ if (!hdev->pdata->ux500)
+ *preg++ = stm32_hash_read(hdev, HASH_IMR);
+ *preg++ = stm32_hash_read(hdev, HASH_STR);
+ *preg++ = stm32_hash_read(hdev, HASH_CR);
+ for (i = 0; i < swap_reg; i++)
+ *preg++ = stm32_hash_read(hdev, HASH_CSR(i));
+
+pm_runtime:
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+}
+
static int stm32_hash_enqueue(struct ahash_request *req, unsigned int op)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
@@ -1070,16 +1393,26 @@ 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 || !(state->flags & HASH_FLAGS_CPU))
+ if (!req->nbytes)
return 0;
- rctx->total = req->nbytes;
- rctx->sg = req->src;
- rctx->offset = 0;
- if ((state->bufcnt + rctx->total < state->blocklen)) {
- stm32_hash_append_sg(rctx);
- return 0;
+ if (state->flags & HASH_FLAGS_CPU) {
+ rctx->total = req->nbytes;
+ rctx->sg = req->src;
+ rctx->offset = 0;
+
+ if ((state->bufcnt + rctx->total < state->blocklen)) {
+ stm32_hash_append_sg(rctx);
+ return 0;
+ }
+ } else { /* DMA mode */
+ if (state->bufcnt + req->nbytes <= state->blocklen) {
+ scatterwalk_map_and_copy(state->buffer + state->bufcnt, req->src,
+ 0, req->nbytes, 0);
+ state->bufcnt += req->nbytes;
+ return 0;
+ }
}
return stm32_hash_enqueue(req, HASH_OP_UPDATE);
@@ -1098,20 +1431,18 @@ static int stm32_hash_final(struct ahash_request *req)
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;
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))
- state->flags &= ~HASH_FLAGS_CPU;
+ if ((state->flags & HASH_FLAGS_CPU)) {
+ rctx->total = req->nbytes;
+ rctx->sg = req->src;
+ rctx->offset = 0;
+ }
out:
return stm32_hash_final(req);
@@ -1215,7 +1546,6 @@ static int stm32_hash_cra_sha3_hmac_init(struct crypto_tfm *tfm)
HASH_FLAGS_HMAC);
}
-
static void stm32_hash_cra_exit(struct crypto_tfm *tfm)
{
struct stm32_hash_ctx *ctx = crypto_tfm_ctx(tfm);
@@ -1228,14 +1558,9 @@ static irqreturn_t stm32_hash_irq_thread(int irq, void *dev_id)
{
struct stm32_hash_dev *hdev = dev_id;
- if (HASH_FLAGS_CPU & hdev->flags) {
- if (HASH_FLAGS_OUTPUT_READY & hdev->flags) {
- hdev->flags &= ~HASH_FLAGS_OUTPUT_READY;
- goto finish;
- }
- } else if (HASH_FLAGS_DMA_ACTIVE & hdev->flags) {
- hdev->flags &= ~HASH_FLAGS_DMA_ACTIVE;
- goto finish;
+ if (HASH_FLAGS_OUTPUT_READY & hdev->flags) {
+ hdev->flags &= ~HASH_FLAGS_OUTPUT_READY;
+ goto finish;
}
return IRQ_HANDLED;
@@ -1984,6 +2309,7 @@ static const struct stm32_hash_pdata stm32_hash_pdata_stm32mp13 = {
.algs_info_size = ARRAY_SIZE(stm32_hash_algs_info_stm32mp13),
.has_sr = true,
.has_mdmat = true,
+ .context_secured = true,
};
static const struct of_device_id stm32_hash_of_match[] = {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 12:32:56 +0000