Re: [PATCH 06/12] crypto: caam - change return code in caam_jr_enqueue function

From: Iuliana Prodan
Date: Tue Dec 10 2019 - 07:28:40 EST

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In reply to: Bastian Krause: "Re: [PATCH 06/12] crypto: caam - change return code in caam_jr_enqueue function"
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On 12/10/2019 1:56 PM, Bastian Krause wrote:
> Hi,
>
> On 11/17/19 11:30 PM, Iuliana Prodan wrote:
>> 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.
>>
>> Signed-off-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
>> Reviewed-by: Horia Geantă <horia.geanta@xxxxxxx>
>> ---
>> 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 5f9f16c..baf4ab1 100644
>> --- a/drivers/crypto/caam/caamhash.c
>> +++ b/drivers/crypto/caam/caamhash.c
>> @@ -422,7 +422,7 @@ 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;
>> @@ -858,10 +858,8 @@ 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);
>> @@ -936,10 +934,9 @@ 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);
>> @@ -1013,10 +1010,9 @@ 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);
>> @@ -1086,9 +1082,7 @@ 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);
>> }
>> @@ -1138,9 +1132,7 @@ 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);
>> }
>> @@ -1258,10 +1250,9 @@ 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;
>> @@ -1353,9 +1344,7 @@ 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);
>> }
>> @@ -1452,10 +1441,9 @@ 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..e3e4bf2 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)
>
> Shouldn't this be -EINPROGRESS ?
>
Yes, it should be -EINPROGRESS.
I'm working on a v2 and will update this, also.

Thanks,
Iulia

>> 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)
>
> And here the same?
>
> Regards,
> Bastian
>
>> 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;
>>
>
>

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In reply to: Bastian Krause: "Re: [PATCH 06/12] crypto: caam - change return code in caam_jr_enqueue function"
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