On 9/9/2015 9:57 AM, Alex Porosanu wrote:
> caam_jr_enqueue() function returns -EBUSY once there are no
> more slots available in the JR, but it doesn't actually save
> the current request. This breaks the functionality of users
> that expect that even if there is no more space for the request,
> it is at least queued for later execution. In other words, all
> crypto transformations that request backlogging
> (i.e. have CRYPTO_TFM_REQ_MAY_BACKLOG set), will hang. Such an
> example is dm-crypt.
> The current patch solves this issue by setting a threshold after
> which caam_jr_enqueue() returns -EBUSY, but since the HW job ring
> isn't actually full, the job is enqueued.
You should mention the reason of not using the functions and mechanism
available in the Crypto API, i.e. having a 0-length crypto_queue used
only for backlogging.
> Caveat: if the users of the driver don't obey the API contract which
> states that once -EBUSY is received, no more requests are to be
> sent, eventually the driver will reject the enqueues.
>
> Signed-off-by: Alex Porosanu <alexandru.porosanu@xxxxxxxxxxxxx>
> ---
> drivers/crypto/caam/caamalg.c | 233 ++++++++++++++++++++++++++++++++++--------
> drivers/crypto/caam/intern.h | 7 ++
> drivers/crypto/caam/jr.c | 190 +++++++++++++++++++++++++++-------
> drivers/crypto/caam/jr.h | 5 +
> 4 files changed, 352 insertions(+), 83 deletions(-)
The patch updates only caamalg.c. What about the others (caamhash.c etc.)?
>
> diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
> index ba79d63..c281483 100644
> --- a/drivers/crypto/caam/caamalg.c
> +++ b/drivers/crypto/caam/caamalg.c
> @@ -1815,9 +1815,14 @@ static void aead_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
>
> edesc = container_of(desc, struct aead_edesc, hw_desc[0]);
>
> - if (err)
> + if (err && (err != -EINPROGRESS))
> caam_jr_strstatus(jrdev, err);
>
> + if (err == -EINPROGRESS) {
> + aead_request_complete(req, err);
> + return;
> + }
Logic can be simplified by reversing the conditions:
if (err == -EINPROGRESS)
goto out;
if (err)
caam_jr_strstatus(jrdev, err);
[...]
out:
aead_request_complete(req, err);
Same for the other places.
> +
> aead_unmap(jrdev, edesc, req);
>
> kfree(edesc);
> @@ -1837,9 +1842,14 @@ static void aead_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
>
> edesc = container_of(desc, struct aead_edesc, hw_desc[0]);
>
> - if (err)
> + if (err && (err != -EINPROGRESS))
> caam_jr_strstatus(jrdev, err);
>
> + if (err == -EINPROGRESS) {
> + aead_request_complete(req, err);
> + return;
> + }
> +
> aead_unmap(jrdev, edesc, req);
>
> /*
> @@ -1864,13 +1874,17 @@ static void ablkcipher_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
>
> dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
> #endif
> -
> edesc = (struct ablkcipher_edesc *)((char *)desc -
> offsetof(struct ablkcipher_edesc, hw_desc));
>
> - if (err)
> + if (err && (err != -EINPROGRESS))
> caam_jr_strstatus(jrdev, err);
>
> + if (err == -EINPROGRESS) {
> + ablkcipher_request_complete(req, err);
> + return;
> + }
> +
> #ifdef DEBUG
> print_hex_dump(KERN_ERR, "dstiv @"__stringify(__LINE__)": ",
> DUMP_PREFIX_ADDRESS, 16, 4, req->info,
> @@ -1900,9 +1914,14 @@ static void ablkcipher_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
>
> edesc = (struct ablkcipher_edesc *)((char *)desc -
> offsetof(struct ablkcipher_edesc, hw_desc));
> - if (err)
> + if (err && (err != -EINPROGRESS))
> caam_jr_strstatus(jrdev, err);
>
> + if (err == -EINPROGRESS) {
> + ablkcipher_request_complete(req, err);
> + return;
> + }
> +
> #ifdef DEBUG
> print_hex_dump(KERN_ERR, "dstiv @"__stringify(__LINE__)": ",
> DUMP_PREFIX_ADDRESS, 16, 4, req->info,
> @@ -2294,12 +2313,30 @@ static int gcm_encrypt(struct aead_request *req)
> #endif
>
> desc = edesc->hw_desc;
> - ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc, aead_encrypt_done,
> + req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - aead_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
Again, this should be simplified:
if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
ret = caam_jr_enqueue_bklog(jrdev, desc, aead_encrypt_done,
req);
if (ret == -EBUSY)
return ret;
} else {
ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
}
if (!ret) {
ret = -EINPROGRESS;
} else {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
>
> return ret;
> @@ -2338,12 +2375,30 @@ static int aead_encrypt(struct aead_request *req)
> #endif
>
> desc = edesc->hw_desc;
> - ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc, aead_encrypt_done,
> + req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - aead_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
>
> return ret;
> @@ -2373,12 +2428,30 @@ static int gcm_decrypt(struct aead_request *req)
> #endif
>
> desc = edesc->hw_desc;
> - ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc, aead_decrypt_done,
> + req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - aead_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
>
> return ret;
> @@ -2423,12 +2496,30 @@ static int aead_decrypt(struct aead_request *req)
> #endif
>
> desc = edesc->hw_desc;
> - ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc, aead_decrypt_done,
> + req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - aead_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + aead_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
>
> return ret;
> @@ -2575,13 +2666,31 @@ static int ablkcipher_encrypt(struct ablkcipher_request *req)
> desc_bytes(edesc->hw_desc), 1);
> #endif
> desc = edesc->hw_desc;
> - ret = caam_jr_enqueue(jrdev, desc, ablkcipher_encrypt_done, req);
> -
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc,
> + ablkcipher_encrypt_done, req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + ablkcipher_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - ablkcipher_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue(jrdev, desc, ablkcipher_encrypt_done,
> + req);
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + ablkcipher_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
>
> return ret;
> @@ -2612,15 +2721,32 @@ static int ablkcipher_decrypt(struct ablkcipher_request *req)
> DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
> desc_bytes(edesc->hw_desc), 1);
> #endif
> -
> - ret = caam_jr_enqueue(jrdev, desc, ablkcipher_decrypt_done, req);
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc,
> + ablkcipher_decrypt_done, req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + ablkcipher_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - ablkcipher_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue_bklog(jrdev, desc,
> + ablkcipher_decrypt_done, req);
Typo, s/caam_jr_enqueue_bklog/caam_jr_enqueue.
What testing has been performed?
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + ablkcipher_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
> -
> return ret;
> }
>
> @@ -2757,13 +2883,32 @@ static int ablkcipher_givencrypt(struct skcipher_givcrypt_request *creq)
> desc_bytes(edesc->hw_desc), 1);
> #endif
> desc = edesc->hw_desc;
> - ret = caam_jr_enqueue(jrdev, desc, ablkcipher_encrypt_done, req);
> -
> - if (!ret) {
> - ret = -EINPROGRESS;
> + if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
> + ret = caam_jr_enqueue_bklog(jrdev, desc,
> + ablkcipher_encrypt_done, req);
> + switch (ret) {
> + case 0:
> + ret = -EINPROGRESS;
> + break;
> +
> + case -EBUSY:
> + break;
> +
> + default:
> + ablkcipher_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + break;
> + }
> } else {
> - ablkcipher_unmap(jrdev, edesc, req);
> - kfree(edesc);
> + ret = caam_jr_enqueue(jrdev, desc, ablkcipher_encrypt_done,
> + req);
> +
> + if (!ret) {
> + ret = -EINPROGRESS;
> + } else {
> + ablkcipher_unmap(jrdev, edesc, req);
> + kfree(edesc);
> + }
> }
>
> return ret;
> diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
> index e2bcacc..13e63ef 100644
> --- a/drivers/crypto/caam/intern.h
> +++ b/drivers/crypto/caam/intern.h
> @@ -11,6 +11,12 @@
>
> /* Currently comes from Kconfig param as a ^2 (driver-required) */
> #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
> +/*
> + * If the user tries to enqueue a job and the number of slots available
> + * is less than this value, then the job will be backlogged (if the user
> + * allows for it) or it will be dropped.
> + */
> +#define JOBR_THRESH 16
Why 16?
What happens when user configures CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE to
{2, 3, 4}?
Threshold should depend on JOBR_DEPTH.
>
> /* Kconfig params for interrupt coalescing if selected (else zero) */
> #ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_INTC
> @@ -33,6 +39,7 @@ struct caam_jrentry_info {
> u32 *desc_addr_virt; /* Stored virt addr for postprocessing */
> dma_addr_t desc_addr_dma; /* Stored bus addr for done matching */
> u32 desc_size; /* Stored size for postprocessing, header derived */
> + bool is_backlogged; /* True if the request has been backlogged */
> };
>
> /* Private sub-storage for a single JobR */
> diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
> index f7e0d8d..916288d 100644
> --- a/drivers/crypto/caam/jr.c
> +++ b/drivers/crypto/caam/jr.c
> @@ -168,6 +168,7 @@ static void caam_jr_dequeue(unsigned long devarg)
> void (*usercall)(struct device *dev, u32 *desc, u32 status, void *arg);
> u32 *userdesc, userstatus;
> void *userarg;
> + bool is_backlogged;
>
> while (rd_reg32(&jrp->rregs->outring_used)) {
>
> @@ -201,6 +202,7 @@ static void caam_jr_dequeue(unsigned long devarg)
> userarg = jrp->entinfo[sw_idx].cbkarg;
> userdesc = jrp->entinfo[sw_idx].desc_addr_virt;
> userstatus = jrp->outring[hw_idx].jrstatus;
> + is_backlogged = jrp->entinfo[sw_idx].is_backlogged;
>
> /*
> * Make sure all information from the job has been obtained
> @@ -231,6 +233,20 @@ static void caam_jr_dequeue(unsigned long devarg)
>
> spin_unlock(&jrp->outlock);
>
> + if (is_backlogged)
> + /*
> + * For backlogged requests, the user callback needs to
> + * be called twice: once when starting to process it
> + * (with a status of -EINPROGRESS and once when it's
> + * done. Since SEC cheats by enqueuing the request in
> + * its HW ring but returning -EBUSY, the time when the
> + * request's processing has started is not known.
> + * Thus notify here the user. The second call is on the
> + * normal path (i.e. the one that is called even for
> + * non-backlogged requests.
^ missing parenthesis
> + */
> + usercall(dev, userdesc, -EINPROGRESS, userarg);
> +
> /* Finally, execute user's callback */
> usercall(dev, userdesc, userstatus, userarg);
> }
> @@ -292,6 +308,84 @@ void caam_jr_free(struct device *rdev)
> }
> EXPORT_SYMBOL(caam_jr_free);
>
> +static inline int __caam_jr_enqueue(struct caam_drv_private_jr *jrp, u32 *desc,
> + int desc_size, dma_addr_t desc_dma,
> + void (*cbk)(struct device *dev, u32 *desc,
> + u32 status, void *areq),
> + void *areq,
> + bool can_be_backlogged)
> +{
> + int head, tail;
> + struct caam_jrentry_info *head_entry;
> + int ret = 0, hw_slots, sw_slots;
> +
> + spin_lock_bh(&jrp->inplock);
> +
> + head = jrp->head;
> + tail = ACCESS_ONCE(jrp->tail);
> +
> + head_entry = &jrp->entinfo[head];
> +
> + /* Reset backlogging status here */
> + head_entry->is_backlogged = false;
> +
> + hw_slots = rd_reg32(&jrp->rregs->inpring_avail);
> + sw_slots = CIRC_SPACE(head, tail, JOBR_DEPTH);
> +
> + if (hw_slots <= JOBR_THRESH || sw_slots <= JOBR_THRESH) {
> + /*
> + * The state below can be reached in three cases:
> + * 1) A badly behaved backlogging user doesn't back off when
> + * told so by the -EBUSY return code
> + * 2) More than JOBR_THRESH backlogging users requests
> + * 3) Due to the high system load, the entries reserved for the
> + * backlogging users are being filled (slowly) in between
> + * the successive calls to the user callback (the first one
> + * with -EINPROGRESS and the 2nd one with the real result.
> + * The code below is a last-resort measure which will DROP
> + * any request if there is physically no more space. This will
> + * lead to data-loss for disk-related users.
> + */
> + if (!hw_slots || sw_slots <= 0) {
sw_slots cannot be negative.
> + spin_unlock_bh(&jrp->inplock);
> + return -EIO;
Or:
ret = -EIO;
goto out_unlock;
> + }
> +
> + if (can_be_backlogged) {
> + head_entry->is_backlogged = true;
> + ret = -EBUSY;
> + } else {
> + spin_unlock_bh(&jrp->inplock);
> + return -EBUSY;
> + }
Or:
ret = -EBUSY;
if (!can_be_backlogged)
goto out_unlock;
head_entry->is_backlogged = true;
> + }
> +
> + head_entry->desc_addr_virt = desc;
> + head_entry->desc_size = desc_size;
> + head_entry->callbk = (void *)cbk;
> + head_entry->cbkarg = areq;
> + head_entry->desc_addr_dma = desc_dma;
> +
> + jrp->inpring[jrp->inp_ring_write_index] = desc_dma;
> +
> + /*
> + * Guarantee that the descriptor's DMA address has been written to
> + * the next slot in the ring before the write index is updated, since
> + * other cores may update this index independently.
> + */
> + smp_wmb();
> +
> + jrp->inp_ring_write_index = (jrp->inp_ring_write_index + 1) &
> + (JOBR_DEPTH - 1);
> + jrp->head = (head + 1) & (JOBR_DEPTH - 1);
> +
> + wr_reg32(&jrp->rregs->inpring_jobadd, 1);
> +
out_unlock:
> + spin_unlock_bh(&jrp->inplock);
> +
> + return ret;
> +}
> +
> /**
> * 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
> @@ -326,8 +420,7 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
> void *areq)
> {
> struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
> - struct caam_jrentry_info *head_entry;
> - int head, tail, desc_size;
> + int desc_size, ret;
> dma_addr_t desc_dma;
>
> desc_size = (*desc & HDR_JD_LENGTH_MASK) * sizeof(u32);
> @@ -337,51 +430,70 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
> return -EIO;
> }
>
> - spin_lock_bh(&jrp->inplock);
> -
> - head = jrp->head;
> - tail = ACCESS_ONCE(jrp->tail);
> -
> - if (!rd_reg32(&jrp->rregs->inpring_avail) ||
> - CIRC_SPACE(head, tail, JOBR_DEPTH) <= 0) {
> - spin_unlock_bh(&jrp->inplock);
> + ret = __caam_jr_enqueue(jrp, desc, desc_size, desc_dma, cbk, areq,
> + false);
> + if (unlikely(ret))
> dma_unmap_single(dev, desc_dma, desc_size, DMA_TO_DEVICE);
> - return -EBUSY;
> - }
>
> - head_entry = &jrp->entinfo[head];
> - head_entry->desc_addr_virt = desc;
> - head_entry->desc_size = desc_size;
> - head_entry->callbk = (void *)cbk;
> - head_entry->cbkarg = areq;
> - head_entry->desc_addr_dma = desc_dma;
> -
> - jrp->inpring[jrp->inp_ring_write_index] = desc_dma;
> -
> - /*
> - * Guarantee that the descriptor's DMA address has been written to
> - * the next slot in the ring before the write index is updated, since
> - * other cores may update this index independently.
> - */
> - smp_wmb();
> + return ret;
> +}
> +EXPORT_SYMBOL(caam_jr_enqueue);
>
> - jrp->inp_ring_write_index = (jrp->inp_ring_write_index + 1) &
> - (JOBR_DEPTH - 1);
> - jrp->head = (head + 1) & (JOBR_DEPTH - 1);
> +/**
> + * caam_jr_enqueue_bklog() - Enqueue a job descriptor head, returns 0 if OK, or
> + * -EINPROGRESS if the number of available entries in the Job Ring is less
The function actually returns -EBUSY, not -EINPROGRESS.
> + * than the threshold configured through CONFIG_CRYPTO_DEV_FSL_CAAM_BKLOG_SIZE,
Leftover, threshold is not configurable.
> + * and -EIO if it cannot map the caller's descriptor or if the threshold has
> + * been exceeded.
> + * @dev: device of the job ring to be used. This device should have
> + * been assigned prior by caam_jr_register().
> + * @desc: points to a job descriptor that execute our request. All
> + * descriptors (and all referenced data) must be in a DMAable
> + * region, and all data references must be physical addresses
> + * accessible to CAAM (i.e. within a PAMU window granted
> + * to it).
> + * @cbk: pointer to a callback function to be invoked upon completion
> + * of this request. This has the form:
> + * callback(struct device *dev, u32 *desc, u32 stat, void *arg)
> + * where:
> + * @dev: contains the job ring device that processed this
> + * response.
> + * @desc: descriptor that initiated the request, same as
> + * "desc" being argued to caam_jr_enqueue().
> + * @status: untranslated status received from CAAM. See the
> + * reference manual for a detailed description of
> + * error meaning, or see the JRSTA definitions in the
> + * register header file
> + * @areq: optional pointer to an argument passed with the
> + * original request
Though I haven't checked, I am pretty sure that kernel-doc is not smart
enough to handle the description of function/callback parameters.
> + * @areq: optional pointer to a user argument for use at callback
> + * time.
> + **/
> +int caam_jr_enqueue_bklog(struct device *dev, u32 *desc,
> + void (*cbk)(struct device *dev, u32 *desc,
> + u32 status, void *areq),
> + void *areq)
> +{
> + struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
> + int desc_size, ret;
> + dma_addr_t desc_dma;
>
> - /*
> - * Ensure that all job information has been written before
> - * notifying CAAM that a new job was added to the input ring.
> - */
> - wmb();
> + desc_size = (*desc & HDR_JD_LENGTH_MASK) * sizeof(u32);
> + desc_dma = dma_map_single(dev, desc, desc_size, DMA_TO_DEVICE);
> + if (dma_mapping_error(dev, desc_dma)) {
> + dev_err(dev, "caam_jr_enqueue(): can't map jobdesc\n");
> + return -EIO;
> + }
>
> - wr_reg32(&jrp->rregs->inpring_jobadd, 1);
> + ret = __caam_jr_enqueue(jrp, desc, desc_size, desc_dma, cbk, areq,
> + true);
> + if (unlikely(ret && (ret != -EBUSY)))
> + dma_unmap_single(dev, desc_dma, desc_size, DMA_TO_DEVICE);
>
> - spin_unlock_bh(&jrp->inplock);
> + return ret;
>
> - return 0;
> }
> -EXPORT_SYMBOL(caam_jr_enqueue);
> +EXPORT_SYMBOL(caam_jr_enqueue_bklog);
>
> /*
> * Init JobR independent of platform property detection
> diff --git a/drivers/crypto/caam/jr.h b/drivers/crypto/caam/jr.h
> index 97113a6..21558df 100644
> --- a/drivers/crypto/caam/jr.h
> +++ b/drivers/crypto/caam/jr.h
> @@ -15,4 +15,9 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
> void *areq),
> void *areq);
>
> +int caam_jr_enqueue_bklog(struct device *dev, u32 *desc,
> + void (*cbk)(struct device *dev, u32 *desc, u32 status,
> + void *areq),
> + void *areq);
> +
> #endif /* JR_H */
>
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