Re: [PATCH 4.13 07/28] crypto: brcm - Explicity ACK mailbox message

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

Nope, this patch breaks the build as it relies on a previous patch that
is not in 4.13-stable, so I'm dropping it.  If anyone wants it there,
well, it really feels like it shouldn't be included in a stable tree
anyway...

thanks,

greg k-h

On Sun, Nov 19, 2017 at 03:43:54PM +0100, Greg Kroah-Hartman wrote:
> 4.13-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: raveendra padasalagi <raveendra.padasalagi@broadcom.com>
> 
> commit f0e2ce58f853634d7ad1a418a49bd5fbd556227c upstream.
> 
> 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: 9d12ba86f818 ("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>
> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> ---
>  drivers/crypto/bcm/cipher.c |  101 ++++++++++++++++++++------------------------
>  1 file changed, 46 insertions(+), 55 deletions(-)
> 
> --- a/drivers/crypto/bcm/cipher.c
> +++ b/drivers/crypto/bcm/cipher.c
> @@ -258,6 +258,44 @@ spu_ablkcipher_tx_sg_create(struct brcm_
>  	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
> @@ -295,7 +333,6 @@ static int handle_ablkcipher_req(struct
>  	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 */
> @@ -464,24 +501,9 @@ static int handle_ablkcipher_req(struct
>  	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;
>  }
> @@ -712,7 +734,6 @@ static int handle_ahash_req(struct iproc
>  	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.
> @@ -906,24 +927,10 @@ static int handle_ahash_req(struct iproc
>  	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;
>  }
>  
> @@ -1322,7 +1329,6 @@ static int handle_aead_req(struct iproc_
>  	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.
>  	 */
> @@ -1560,24 +1566,9 @@ static int handle_aead_req(struct iproc_
>  	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;
>  }
> @@ -4534,7 +4525,7 @@ static int spu_mb_init(struct device *de
>  	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;
>  
>