netdev - Re: [PATCH net-next v1 1/1] net/tls: Combined memory allocation for decryption request

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Date:   Wed, 8 Aug 2018 10:07:16 -0700
From:   Dave Watson <davejwatson@...com>
To:     Vakul Garg <vakul.garg@....com>
CC:     <netdev@...r.kernel.org>, <borisp@...lanox.com>,
        <aviadye@...lanox.com>, <davem@...emloft.net>
Subject: Re: [PATCH net-next v1 1/1] net/tls: Combined memory allocation for
 decryption request

On 08/08/18 06:36 PM, Vakul Garg wrote:
> For preparing decryption request, several memory chunks are required
> (aead_req, sgin, sgout, iv, aad). For submitting the decrypt request to
> an accelerator, it is required that the buffers which are read by the
> accelerator must be dma-able and not come from stack. The buffers for
> aad and iv can be separately kmalloced each, but it is inefficient.
> This patch does a combined allocation for preparing decryption request
> and then segments into aead_req || sgin || sgout || iv || aad.
> 
> Signed-off-by: Vakul Garg <vakul.garg@....com>
> ---
> +			n_sgout = sg_nents(out_sg);
> +
> +		n_sgin = skb_nsg(skb, rxm->offset + tls_ctx->rx.prepend_size,
> +				 rxm->full_len - tls_ctx->rx.prepend_size);
> +	} else {
> +no_zerocopy:

label is unused now