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Subject[PATCH v2 05/10] crypto: caam - change return code in caam_jr_enqueue function
Date
Based on commit 6b80ea389a0b ("crypto: change transient busy return code to -ENOSPC"),
change the return code of caam_jr_enqueue function to -EINPROGRESS, in
case of success, -ENOSPC in case the CAAM is busy (has no space left
in job ring queue), -EIO if it cannot map the caller's descriptor.

Update, also, the cases for resource-freeing for each algorithm type.

This is done for later use, on backlogging support in CAAM.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geanta <horia.geanta@nxp.com>
---
drivers/crypto/caam/caamalg.c | 16 ++++------------
drivers/crypto/caam/caamhash.c | 34 +++++++++++-----------------------
drivers/crypto/caam/caampkc.c | 16 ++++++++--------
drivers/crypto/caam/caamrng.c | 4 ++--
drivers/crypto/caam/jr.c | 8 ++++----
drivers/crypto/caam/key_gen.c | 2 +-
6 files changed, 30 insertions(+), 50 deletions(-)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 6e021692..21b6172 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -1417,9 +1417,7 @@ static inline int chachapoly_crypt(struct aead_request *req, bool encrypt)
1);

ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
@@ -1462,9 +1460,7 @@ static inline int aead_crypt(struct aead_request *req, bool encrypt)

desc = edesc->hw_desc;
ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
@@ -1507,9 +1503,7 @@ static inline int gcm_crypt(struct aead_request *req, bool encrypt)

desc = edesc->hw_desc;
ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
@@ -1725,9 +1719,7 @@ static inline int skcipher_crypt(struct skcipher_request *req, bool encrypt)
desc = edesc->hw_desc;
ret = caam_jr_enqueue(jrdev, desc, skcipher_crypt_done, req);

- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
skcipher_unmap(jrdev, edesc, req);
kfree(edesc);
}
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 844e391..b019d7e 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -395,7 +395,7 @@ static int hash_digest_key(struct caam_hash_ctx *ctx, u32 *keylen, u8 *key,
init_completion(&result.completion);

ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
- if (!ret) {
+ if (ret == -EINPROGRESS) {
/* in progress */
wait_for_completion(&result.completion);
ret = result.err;
@@ -833,10 +833,8 @@ static int ahash_update_ctx(struct ahash_request *req)
desc_bytes(desc), 1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done_bi, req);
- if (ret)
+ if (ret != -EINPROGRESS)
goto unmap_ctx;
-
- ret = -EINPROGRESS;
} else if (*next_buflen) {
scatterwalk_map_and_copy(buf + *buflen, req->src, 0,
req->nbytes, 0);
@@ -908,10 +906,9 @@ static int ahash_final_ctx(struct ahash_request *req)
1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, req);
- if (ret)
- goto unmap_ctx;
+ if (ret == -EINPROGRESS)
+ return ret;

- return -EINPROGRESS;
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_BIDIRECTIONAL);
kfree(edesc);
@@ -985,10 +982,9 @@ static int ahash_finup_ctx(struct ahash_request *req)
1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, req);
- if (ret)
- goto unmap_ctx;
+ if (ret == -EINPROGRESS)
+ return ret;

- return -EINPROGRESS;
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_BIDIRECTIONAL);
kfree(edesc);
@@ -1058,9 +1054,7 @@ static int ahash_digest(struct ahash_request *req)
1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
kfree(edesc);
}
@@ -1110,9 +1104,7 @@ static int ahash_final_no_ctx(struct ahash_request *req)
1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
kfree(edesc);
}
@@ -1223,10 +1215,9 @@ static int ahash_update_no_ctx(struct ahash_request *req)
desc_bytes(desc), 1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, req);
- if (ret)
+ if (ret != -EINPROGRESS)
goto unmap_ctx;

- ret = -EINPROGRESS;
state->update = ahash_update_ctx;
state->finup = ahash_finup_ctx;
state->final = ahash_final_ctx;
@@ -1315,9 +1306,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
+ if (ret != -EINPROGRESS) {
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
kfree(edesc);
}
@@ -1411,10 +1400,9 @@ static int ahash_update_first(struct ahash_request *req)
desc_bytes(desc), 1);

ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, req);
- if (ret)
+ if (ret != -EINPROGRESS)
goto unmap_ctx;

- ret = -EINPROGRESS;
state->update = ahash_update_ctx;
state->finup = ahash_finup_ctx;
state->final = ahash_final_ctx;
diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index ebf1677..7f7ea32 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -634,8 +634,8 @@ static int caam_rsa_enc(struct akcipher_request *req)
init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub);

ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_pub_done, req);
- if (!ret)
- return -EINPROGRESS;
+ if (ret == -EINPROGRESS)
+ return ret;

rsa_pub_unmap(jrdev, edesc, req);

@@ -667,8 +667,8 @@ static int caam_rsa_dec_priv_f1(struct akcipher_request *req)
init_rsa_priv_f1_desc(edesc->hw_desc, &edesc->pdb.priv_f1);

ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f_done, req);
- if (!ret)
- return -EINPROGRESS;
+ if (ret == -EINPROGRESS)
+ return ret;

rsa_priv_f1_unmap(jrdev, edesc, req);

@@ -700,8 +700,8 @@ static int caam_rsa_dec_priv_f2(struct akcipher_request *req)
init_rsa_priv_f2_desc(edesc->hw_desc, &edesc->pdb.priv_f2);

ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f_done, req);
- if (!ret)
- return -EINPROGRESS;
+ if (ret == -EINPROGRESS)
+ return ret;

rsa_priv_f2_unmap(jrdev, edesc, req);

@@ -733,8 +733,8 @@ static int caam_rsa_dec_priv_f3(struct akcipher_request *req)
init_rsa_priv_f3_desc(edesc->hw_desc, &edesc->pdb.priv_f3);

ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f_done, req);
- if (!ret)
- return -EINPROGRESS;
+ if (ret == -EINPROGRESS)
+ return ret;

rsa_priv_f3_unmap(jrdev, edesc, req);

diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index e8baaca..34cbb4a 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -133,7 +133,7 @@ static inline int submit_job(struct caam_rng_ctx *ctx, int to_current)
dev_dbg(jrdev, "submitting job %d\n", !(to_current ^ ctx->current_buf));
init_completion(&bd->filled);
err = caam_jr_enqueue(jrdev, desc, rng_done, ctx);
- if (err)
+ if (err != -EINPROGRESS)
complete(&bd->filled); /* don't wait on failed job*/
else
atomic_inc(&bd->empty); /* note if pending */
@@ -153,7 +153,7 @@ static int caam_read(struct hwrng *rng, void *data, size_t max, bool wait)
if (atomic_read(&bd->empty) == BUF_EMPTY) {
err = submit_job(ctx, 1);
/* if can't submit job, can't even wait */
- if (err)
+ if (err != -EINPROGRESS)
return 0;
}
/* no immediate data, so exit if not waiting */
diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
index fc97cde..df2a050 100644
--- a/drivers/crypto/caam/jr.c
+++ b/drivers/crypto/caam/jr.c
@@ -324,8 +324,8 @@ void caam_jr_free(struct device *rdev)
EXPORT_SYMBOL(caam_jr_free);

/**
- * caam_jr_enqueue() - Enqueue a job descriptor head. Returns 0 if OK,
- * -EBUSY if the queue is full, -EIO if it cannot map the caller's
+ * caam_jr_enqueue() - Enqueue a job descriptor head. Returns -EINPROGRESS
+ * if OK, -ENOSPC if the queue is full, -EIO if it cannot map the caller's
* descriptor.
* @dev: device of the job ring to be used. This device should have
* been assigned prior by caam_jr_register().
@@ -377,7 +377,7 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
CIRC_SPACE(head, tail, JOBR_DEPTH) <= 0) {
spin_unlock_bh(&jrp->inplock);
dma_unmap_single(dev, desc_dma, desc_size, DMA_TO_DEVICE);
- return -EBUSY;
+ return -ENOSPC;
}

head_entry = &jrp->entinfo[head];
@@ -414,7 +414,7 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,

spin_unlock_bh(&jrp->inplock);

- return 0;
+ return -EINPROGRESS;
}
EXPORT_SYMBOL(caam_jr_enqueue);

diff --git a/drivers/crypto/caam/key_gen.c b/drivers/crypto/caam/key_gen.c
index 5a851dd..b0e8a49 100644
--- a/drivers/crypto/caam/key_gen.c
+++ b/drivers/crypto/caam/key_gen.c
@@ -108,7 +108,7 @@ int gen_split_key(struct device *jrdev, u8 *key_out,
init_completion(&result.completion);

ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
- if (!ret) {
+ if (ret == -EINPROGRESS) {
/* in progress */
wait_for_completion(&result.completion);
ret = result.err;
--
2.1.0
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