netdev - [PATCH RFC net-next 0/1] net/tls: Combined memory allocation for decryption request

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Message-Id: <20180806163810.30880-1-vakul.garg@nxp.com>
Date:   Mon,  6 Aug 2018 22:08:09 +0530
From:   Vakul Garg <vakul.garg@....com>
To:     netdev@...r.kernel.org
Cc:     borisp@...lanox.com, aviadye@...lanox.com, davejwatson@...com,
        davem@...emloft.net, Vakul Garg <vakul.garg@....com>
Subject: [PATCH RFC net-next 0/1] net/tls: Combined memory allocation for decryption request

This patch does a combined memory allocation from heap for scatterlists,
aead_request, aad and iv for the tls record decryption path. In present
code, aead_request is allocated from heap, scatterlists on a conditional
basis are allocated on heap or on stack. This is inefficient as it may
requires multiple kmalloc/kfree.

The initialization vector passed in cryption request is allocated on
stack. This is a problem since the stack memory is not dma-able from
crypto accelerators.

Doing one combined memory allocation for each decryption request fixes
both the above issues. It also paves a way to be able to submit multiple
async decryption requests while the previous one is pending i.e. being 
processed or queued.

This patch has been built over Doron Roberts-Kedes's patch:

"net/tls: Calculate nsg for zerocopy path without skb_cow_data"

Vakul Garg (1):
  net/tls: Combined memory allocation for decryption request

 include/net/tls.h |   4 -
 net/tls/tls_sw.c  | 256 +++++++++++++++++++++++++++++++-----------------------
 2 files changed, 147 insertions(+), 113 deletions(-)

-- 
2.13.6