int sun4i_hash_crainit(struct crypto_tfm *tfm)
{
+ struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
+ struct sun4i_ss_alg_template *algt;
+
+ memset(op, 0, sizeof(struct sun4i_tfm_ctx));
+
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash);
+ op->ss = algt->ss;
+
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct sun4i_req_ctx));
return 0;
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
struct sun4i_ss_alg_template *algt;
- struct sun4i_ss_ctx *ss;
memset(op, 0, sizeof(struct sun4i_req_ctx));
algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash);
- ss = algt->ss;
- op->ss = algt->ss;
op->mode = algt->mode;
return 0;
return 0;
}
+#define SS_HASH_UPDATE 1
+#define SS_HASH_FINAL 2
+
/*
* sun4i_hash_update: update hash engine
*
* write remaining data in op->buf
* final state op->len=56
*/
-int sun4i_hash_update(struct ahash_request *areq)
+int sun4i_hash(struct ahash_request *areq)
{
u32 v, ivmode = 0;
unsigned int i = 0;
*/
struct sun4i_req_ctx *op = ahash_request_ctx(areq);
- struct sun4i_ss_ctx *ss = op->ss;
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun4i_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+ struct sun4i_ss_ctx *ss = tfmctx->ss;
unsigned int in_i = 0; /* advancement in the current SG */
unsigned int end;
/*
u32 spaces, rx_cnt = SS_RX_DEFAULT;
size_t copied = 0;
struct sg_mapping_iter mi;
+ unsigned int j = 0;
+ int zeros;
+ unsigned int index, padlen;
+ __be64 bits;
+ u32 bf[32];
+ u32 wb = 0;
+ unsigned int nwait, nbw = 0;
+ struct scatterlist *in_sg = areq->src;
dev_dbg(ss->dev, "%s %s bc=%llu len=%u mode=%x wl=%u h0=%0x",
__func__, crypto_tfm_alg_name(areq->base.tfm),
op->byte_count, areq->nbytes, op->mode,
op->len, op->hash[0]);
- if (areq->nbytes == 0)
+ if (unlikely(areq->nbytes == 0) && (op->flags & SS_HASH_FINAL) == 0)
return 0;
/* protect against overflow */
- if (areq->nbytes > UINT_MAX - op->len) {
+ if (unlikely(areq->nbytes > UINT_MAX - op->len)) {
dev_err(ss->dev, "Cannot process too large request\n");
return -EINVAL;
}
- if (op->len + areq->nbytes < 64) {
+ if (op->len + areq->nbytes < 64 && (op->flags & SS_HASH_FINAL) == 0) {
/* linearize data to op->buf */
copied = sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
op->buf + op->len, areq->nbytes, 0);
return 0;
}
- end = ((areq->nbytes + op->len) / 64) * 64 - op->len;
-
- if (end > areq->nbytes || areq->nbytes - end > 63) {
- dev_err(ss->dev, "ERROR: Bound error %u %u\n",
- end, areq->nbytes);
- return -EINVAL;
- }
-
spin_lock_bh(&ss->slock);
/*
/* Enable the device */
writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL);
+ if ((op->flags & SS_HASH_UPDATE) == 0)
+ goto hash_final;
+
+ /* start of handling data */
+ if ((op->flags & SS_HASH_FINAL) == 0) {
+ end = ((areq->nbytes + op->len) / 64) * 64 - op->len;
+
+ if (end > areq->nbytes || areq->nbytes - end > 63) {
+ dev_err(ss->dev, "ERROR: Bound error %u %u\n",
+ end, areq->nbytes);
+ err = -EINVAL;
+ goto release_ss;
+ }
+ } else {
+ /* Since we have the flag final, we can go up to modulo 4 */
+ end = ((areq->nbytes + op->len) / 4) * 4 - op->len;
+ }
+
+ /* TODO if SGlen % 4 and op->len == 0 then DMA */
+ i = 1;
+ while (in_sg && i == 1) {
+ if ((in_sg->length % 4) != 0)
+ i = 0;
+ in_sg = sg_next(in_sg);
+ }
+ if (i == 1 && op->len == 0)
+ dev_dbg(ss->dev, "We can DMA\n");
+
i = 0;
sg_miter_start(&mi, areq->src, sg_nents(areq->src),
SG_MITER_FROM_SG | SG_MITER_ATOMIC);
}
}
} while (i < end);
- /* final linear */
+
+ /*
+ * Now we have written to the device all that we can,
+ * store the remaining bytes in op->buf
+ */
if ((areq->nbytes - i) < 64) {
while (i < areq->nbytes && in_i < mi.length && op->len < 64) {
/* how many bytes we can read from current SG */
sg_miter_stop(&mi);
+ /*
+ * End of data process
+ * Now if we have the flag final go to finalize part
+ * If not, store the partial hash
+ */
+ if ((op->flags & SS_HASH_FINAL) > 0)
+ goto hash_final;
+
writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);
i = 0;
do {
v = readl(ss->base + SS_CTL);
i++;
} while (i < SS_TIMEOUT && (v & SS_DATA_END) > 0);
- if (i >= SS_TIMEOUT) {
+ if (unlikely(i >= SS_TIMEOUT)) {
dev_err_ratelimited(ss->dev,
"ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
i, SS_TIMEOUT, v, areq->nbytes);
goto release_ss;
}
- /* get the partial hash only if something was written */
for (i = 0; i < crypto_ahash_digestsize(tfm) / 4; i++)
op->hash[i] = readl(ss->base + SS_MD0 + i * 4);
-release_ss:
- writel(0, ss->base + SS_CTL);
- spin_unlock_bh(&ss->slock);
- return err;
-}
+ goto release_ss;
/*
- * sun4i_hash_final: finalize hashing operation
+ * hash_final: finalize hashing operation
*
* If we have some remaining bytes, we write them.
* Then ask the SS for finalizing the hashing operation
*
* I do not check RX FIFO size in this function since the size is 32
* after each enabling and this function neither write more than 32 words.
+ * If we come from the update part, we cannot have more than
+ * 3 remaining bytes to write and SS is fast enough to not care about it.
*/
-int sun4i_hash_final(struct ahash_request *areq)
-{
- u32 v, ivmode = 0;
- unsigned int i;
- unsigned int j = 0;
- int zeros, err = 0;
- unsigned int index, padlen;
- __be64 bits;
- struct sun4i_req_ctx *op = ahash_request_ctx(areq);
- struct sun4i_ss_ctx *ss = op->ss;
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
- u32 bf[32];
- u32 wb = 0;
- unsigned int nwait, nbw = 0;
-
- dev_dbg(ss->dev, "%s: byte=%llu len=%u mode=%x wl=%u h=%x",
- __func__, op->byte_count, areq->nbytes, op->mode,
- op->len, op->hash[0]);
- spin_lock_bh(&ss->slock);
-
- /*
- * if we have already written something,
- * restore the partial hash state
- */
- if (op->byte_count > 0) {
- ivmode = SS_IV_ARBITRARY;
- for (i = 0; i < crypto_ahash_digestsize(tfm) / 4; i++)
- writel(op->hash[i], ss->base + SS_IV0 + i * 4);
- }
- writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL);
+hash_final:
/* write the remaining words of the wait buffer */
if (op->len > 0) {
/*
* Wait for SS to finish the hash.
- * The timeout could happen only in case of bad overcloking
+ * The timeout could happen only in case of bad overclocking
* or driver bug.
*/
i = 0;
v = readl(ss->base + SS_CTL);
i++;
} while (i < SS_TIMEOUT && (v & SS_DATA_END) > 0);
- if (i >= SS_TIMEOUT) {
+ if (unlikely(i >= SS_TIMEOUT)) {
dev_err_ratelimited(ss->dev,
"ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
i, SS_TIMEOUT, v, areq->nbytes);
return err;
}
+int sun4i_hash_final(struct ahash_request *areq)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+
+ op->flags = SS_HASH_FINAL;
+ return sun4i_hash(areq);
+}
+
+int sun4i_hash_update(struct ahash_request *areq)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+
+ op->flags = SS_HASH_UPDATE;
+ return sun4i_hash(areq);
+}
+
/* sun4i_hash_finup: finalize hashing operation after an update */
int sun4i_hash_finup(struct ahash_request *areq)
{
- int err;
-
- err = sun4i_hash_update(areq);
- if (err != 0)
- return err;
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
- return sun4i_hash_final(areq);
+ op->flags = SS_HASH_UPDATE | SS_HASH_FINAL;
+ return sun4i_hash(areq);
}
/* combo of init/update/final functions */
int sun4i_hash_digest(struct ahash_request *areq)
{
int err;
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
err = sun4i_hash_init(areq);
if (err != 0)
return err;
- err = sun4i_hash_update(areq);
- if (err != 0)
- return err;
-
- return sun4i_hash_final(areq);
+ op->flags = SS_HASH_UPDATE | SS_HASH_FINAL;
+ return sun4i_hash(areq);
}
projects / deliverable / linux.git / blobdiff