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crypto: brcm - Explicity ACK mailbox message 

Add support to explicity ACK mailbox message
because after sending message we can know
the send status via error attribute of brcm_message.

This is needed to support "txdone_ack" supported in
mailbox controller driver.

Fixes: 9d12ba86f8 ("crypto: brcm - Add Broadcom SPU driver")
Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
raveendra padasalagi 2017-08-29 15:08:10 +05:30 committed by Herbert Xu
parent 52872f5288
commit f0e2ce58f8
1 changed files with 46 additions and 55 deletions
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101
drivers/crypto/bcm/cipher.c
View File

@ -256,6 +256,44 @@ spu_ablkcipher_tx_sg_create(struct brcm_message *mssg,
return 0;
}
static int mailbox_send_message(struct brcm_message *mssg, u32 flags,
u8 chan_idx)
{
int err;
int retry_cnt = 0;
struct device *dev = &(iproc_priv.pdev->dev);
err = mbox_send_message(iproc_priv.mbox[chan_idx], mssg);
if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) {
while ((err == -ENOBUFS) && (retry_cnt < SPU_MB_RETRY_MAX)) {
/*
* Mailbox queue is full. Since MAY_SLEEP is set, assume
* not in atomic context and we can wait and try again.
*/
retry_cnt++;
usleep_range(MBOX_SLEEP_MIN, MBOX_SLEEP_MAX);
err = mbox_send_message(iproc_priv.mbox[chan_idx],
mssg);
atomic_inc(&iproc_priv.mb_no_spc);
}
}
if (err < 0) {
atomic_inc(&iproc_priv.mb_send_fail);
return err;
}
/* Check error returned by mailbox controller */
err = mssg->error;
if (unlikely(err < 0)) {
dev_err(dev, "message error %d", err);
/* Signal txdone for mailbox channel */
}
/* Signal txdone for mailbox channel */
mbox_client_txdone(iproc_priv.mbox[chan_idx], err);
return err;
}
/**
* handle_ablkcipher_req() - Submit as much of a block cipher request as fits in
* a single SPU request message, starting at the current position in the request
@ -293,7 +331,6 @@ static int handle_ablkcipher_req(struct iproc_reqctx_s *rctx)
u32 pad_len; /* total length of all padding */
bool update_key = false;
struct brcm_message *mssg; /* mailbox message */
int retry_cnt = 0;
/* number of entries in src and dst sg in mailbox message. */
u8 rx_frag_num = 2; /* response header and STATUS */
@ -462,24 +499,9 @@ static int handle_ablkcipher_req(struct iproc_reqctx_s *rctx)
if (err)
return err;
err = mbox_send_message(iproc_priv.mbox[rctx->chan_idx], mssg);
if (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) {
while ((err == -ENOBUFS) && (retry_cnt < SPU_MB_RETRY_MAX)) {
/*
* Mailbox queue is full. Since MAY_SLEEP is set, assume
* not in atomic context and we can wait and try again.
*/
retry_cnt++;
usleep_range(MBOX_SLEEP_MIN, MBOX_SLEEP_MAX);
err = mbox_send_message(iproc_priv.mbox[rctx->chan_idx],
mssg);
atomic_inc(&iproc_priv.mb_no_spc);
}
}
if (unlikely(err < 0)) {
atomic_inc(&iproc_priv.mb_send_fail);
err = mailbox_send_message(mssg, req->base.flags, rctx->chan_idx);
if (unlikely(err < 0))
return err;
}
return -EINPROGRESS;
}
@ -710,7 +732,6 @@ static int handle_ahash_req(struct iproc_reqctx_s *rctx)
u32 spu_hdr_len;
unsigned int digestsize;
u16 rem = 0;
int retry_cnt = 0;
/*
* number of entries in src and dst sg. Always includes SPU msg header.
@ -904,24 +925,10 @@ static int handle_ahash_req(struct iproc_reqctx_s *rctx)
if (err)
return err;
err = mbox_send_message(iproc_priv.mbox[rctx->chan_idx], mssg);
if (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) {
while ((err == -ENOBUFS) && (retry_cnt < SPU_MB_RETRY_MAX)) {
/*
* Mailbox queue is full. Since MAY_SLEEP is set, assume
* not in atomic context and we can wait and try again.
*/
retry_cnt++;
usleep_range(MBOX_SLEEP_MIN, MBOX_SLEEP_MAX);
err = mbox_send_message(iproc_priv.mbox[rctx->chan_idx],
mssg);
atomic_inc(&iproc_priv.mb_no_spc);
}
}
if (err < 0) {
atomic_inc(&iproc_priv.mb_send_fail);
err = mailbox_send_message(mssg, req->base.flags, rctx->chan_idx);
if (unlikely(err < 0))
return err;
}
return -EINPROGRESS;
}
@ -1320,7 +1327,6 @@ static int handle_aead_req(struct iproc_reqctx_s *rctx)
int assoc_nents = 0;
bool incl_icv = false;
unsigned int digestsize = ctx->digestsize;
int retry_cnt = 0;
/* number of entries in src and dst sg. Always includes SPU msg header.
*/
@ -1558,24 +1564,9 @@ static int handle_aead_req(struct iproc_reqctx_s *rctx)
if (err)
return err;
err = mbox_send_message(iproc_priv.mbox[rctx->chan_idx], mssg);
if (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) {
while ((err == -ENOBUFS) && (retry_cnt < SPU_MB_RETRY_MAX)) {
/*
* Mailbox queue is full. Since MAY_SLEEP is set, assume
* not in atomic context and we can wait and try again.
*/
retry_cnt++;
usleep_range(MBOX_SLEEP_MIN, MBOX_SLEEP_MAX);
err = mbox_send_message(iproc_priv.mbox[rctx->chan_idx],
mssg);
atomic_inc(&iproc_priv.mb_no_spc);
}
}
if (err < 0) {
atomic_inc(&iproc_priv.mb_send_fail);
err = mailbox_send_message(mssg, req->base.flags, rctx->chan_idx);
if (unlikely(err < 0))
return err;
}
return -EINPROGRESS;
}
@ -4537,7 +4528,7 @@ static int spu_mb_init(struct device *dev)
mcl->dev = dev;
mcl->tx_block = false;
mcl->tx_tout = 0;
mcl->knows_txdone = false;
mcl->knows_txdone = true;
mcl->rx_callback = spu_rx_callback;
mcl->tx_done = NULL;