netdev - Re: [net-next v4 2/6] net: marvell: prestera: Add PCI interface support

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Message-ID: <20200727130253.GK2216@nanopsycho>
Date:   Mon, 27 Jul 2020 15:02:53 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Vadym Kochan <vadym.kochan@...ision.eu>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Andrew Lunn <andrew@...n.ch>,
        Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
        Serhiy Boiko <serhiy.boiko@...ision.eu>,
        Serhiy Pshyk <serhiy.pshyk@...ision.eu>,
        Volodymyr Mytnyk <volodymyr.mytnyk@...ision.eu>,
        Taras Chornyi <taras.chornyi@...ision.eu>,
        Andrii Savka <andrii.savka@...ision.eu>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Mickey Rachamim <mickeyr@...vell.com>
Subject: Re: [net-next v4 2/6] net: marvell: prestera: Add PCI interface
 support

Mon, Jul 27, 2020 at 02:35:53PM CEST, vadym.kochan@...ision.eu wrote:
>Hi Jiri,
>
>On Mon, Jul 27, 2020 at 02:32:05PM +0200, Jiri Pirko wrote:
>> Mon, Jul 27, 2020 at 02:22:38PM CEST, vadym.kochan@...ision.eu wrote:
>> >Add PCI interface driver for Prestera Switch ASICs family devices, which
>> >provides:
>> >
>> >    - Firmware loading mechanism
>> >    - Requests & events handling to/from the firmware
>> >    - Access to the firmware on the bus level
>> >
>> >The firmware has to be loaded each time the device is reset. The driver
>> >is loading it from:
>> >
>> >    /lib/firmware/marvell/prestera_fw-v{MAJOR}.{MINOR}.img
>> >
>> >The full firmware image version is located within the internal header
>> >and consists of 3 numbers - MAJOR.MINOR.PATCH. Additionally, driver has
>> >hard-coded minimum supported firmware version which it can work with:
>> >
>> >    MAJOR - reflects the support on ABI level between driver and loaded
>> >            firmware, this number should be the same for driver and loaded
>> >            firmware.
>> >
>> >    MINOR - this is the minimum supported version between driver and the
>> >            firmware.
>> >
>> >    PATCH - indicates only fixes, firmware ABI is not changed.
>> >
>> >Firmware image file name contains only MAJOR and MINOR numbers to make
>> >driver be compatible with any PATCH version.
>> >
>> >Signed-off-by: Oleksandr Mazur <oleksandr.mazur@...ision.eu>
>> >Signed-off-by: Vadym Kochan <vadym.kochan@...ision.eu>
>> >Acked-by: Jiri Pirko <jiri@...lanox.com>
>> 
>> You have to remove the tag if you change the patch from last tagged
>> version...
>> 
>OK, sorry, makes sense, should I re-spin with v5 or wait when the status
>is changed to 'Changes Requested' in the patchwork ?

Np. I will review this patch again.

>
>> 
>> >---
>> >PATCH v4:
>> >    1) Get rid of "packed" attribute for the fw image header, it is
>> >       already aligned.
>> >
>> >    2) Cleanup not needed initialization of variables which are used in
>> >       readl_poll_timeout() helpers.
>> >
>> >    3) Replace #define's of prestera_{fw,ldr}_{read,write} to static funcs.
>> >
>> >    4) Use pcim_ helpers for resource allocation
>> >
>> >    5) Use devm_zalloc() for struct prestera_fw instance allocation.
>> >
>> >    6) Use module_pci_driver(prestera_pci_driver) instead of module_{init,exit}.
>> >
>> >    7) Use _MS prefix for timeout #define's.
>> >
>> >    8) Use snprintf for firmware image path generation instead of using
>> >       macrosses.
>> >
>> >    9) Use memcpy_xxxio helpers for IO memory copying.
>> >
>> >   10) By default use same build type ('m' or 'y') for
>> >       CONFIG_PRESTERA_PCI which is used by CONFIG_PRESTERA.
>> >
>> 
>> [...]