lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Thu, 2 Nov 2017 09:27:01 -0700
From:   David Daney <ddaney@...iumnetworks.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        David Daney <david.daney@...ium.com>,
        linux-mips@...ux-mips.org, ralf@...ux-mips.org,
        James Hogan <james.hogan@...s.com>, netdev@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     linux-kernel@...r.kernel.org,
        "Steven J. Hill" <steven.hill@...ium.com>,
        devicetree@...r.kernel.org, Carlos Munoz <cmunoz@...ium.com>
Subject: Re: [PATCH 4/7] MIPS: Octeon: Add Free Pointer Unit (FPA) support.

On 11/01/2017 08:29 PM, Florian Fainelli wrote:
> Le 11/01/17 à 17:36, David Daney a écrit :
>> From: Carlos Munoz <cmunoz@...ium.com>
>>
>>  From the hardware user manual: "The FPA is a unit that maintains
>> pools of pointers to free L2/DRAM memory. To provide QoS, the pools
>> are referenced indirectly through 1024 auras. Both core software
>> and hardware units allocate and free pointers."
> 
> This looks like a possibly similar implement to what
> drivers/net/ethernet/marvell/mvneta_bm.c, can you see if you can make
> any use of genpool_* and include/net/hwbm.h here as well?

Yikes!  Is it permitted to put function definitions that are not "static 
inline" in header files?

The driver currently doesn't use page fragments, so I don't think that 
the hwbm thing can be used.

Also the FPA unit is used to control RED and back pressure in the PKI 
(packet input processor), which are features that are features not 
considered in hwbm.

The OCTEON-III hardware also uses the FPA for non-packet-buffer memory 
allocations.  So for those, it seems that hwbm is also not a good fit.

David Daney

Powered by blists - more mailing lists