linux-kernel - Re: [PATCH v5 00/13] bus/fsl-mc: Extend mc-bus driver functionalities in preparation for mc-bus VFIO support

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Message-ID: <8b3c1222-5dbd-5c51-ac10-8b1c1a69d2d5@nxp.com>
Date:   Tue, 29 Sep 2020 14:06:41 +0300
From:   Laurentiu Tudor <laurentiu.tudor@....com>
To:     Diana Craciun <diana.craciun@....nxp.com>,
        linux-kernel@...r.kernel.org
Cc:     stuyoder@...il.com, leoyang.li@....com, gregkh@...uxfoundation.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 00/13] bus/fsl-mc: Extend mc-bus driver functionalities
 in preparation for mc-bus VFIO support



On 9/29/2020 11:54 AM, Diana Craciun wrote:
> The vfio-mc bus driver needs some additional services to be exported by the
> mc-bus driver like:
> - a way to reset the DPRC container
> - driver_override support
> - functions to setup/tear down a DPRC
> - functions for allocating the pool of interrupts. In case of VFIO the
> interrupts are not configured at probe time, but later by userspace
> request
> 
> v4 -> v5
> - dprc_celanup should not fail
> 
> v3 -> v4
> - Rebased on the latest kernel.
> - Exported a dprc_remove function
> 
> v2 -> v3
> - Add a new version for dprc_get_obj_region
> - Export the cacheability bus specific bits defines
> 
> v1 -> v2
> - Remove driver_override propagation through various functions
> - Cache the DPRC API version
> 
> The patches are related with "vfio/fsl-mc: VFIO support for FSL-MC
> devices" patches, but the series were split because they are targeting
> different subsystems. However, the mc-bus patches may suffer changes
> when addressing the VFIO review comments.
> 
> The patches do not address the comment regarding moving driver_override
> in the core code. I prefer not to tie these patches on that change and
> address that separately.
> 
> Bharat Bhushan (3):
>   bus/fsl-mc: add support for 'driver_override' in the mc-bus
>   bus/fsl-mc: Add dprc-reset-container support
>   bus/fsl-mc: Extend ICID size from 16bit to 32bit
> 
> Diana Craciun (10):
>   bus/fsl-mc: Do no longer export the total number of irqs outside
>     dprc_scan_objects
>   bus/fsl-mc: Add a new parameter to dprc_scan_objects function
>   bus/fsl-mc: Set the QMAN/BMAN region flags
>   bus/fsl-mc: Cache the DPRC API version
>   bus/fsl-mc: Export dprc_scan/dprc_remove functions to be used by
>     multiple entities
>   bus/fsl-mc: Export a cleanup function for DPRC
>   bus/fsl-mc: Add a container setup function
>   bus/fsl_mc: Do not rely on caller to provide non NULL mc_io
>   bus/fsl-mc: Export IRQ pool handling functions to be used by VFIO
>   bus/fsl-mc: Add a new version for dprc_get_obj_region command
> 
>  drivers/bus/fsl-mc/dprc-driver.c      | 190 ++++++++++++++++----------
>  drivers/bus/fsl-mc/dprc.c             | 141 +++++++++++++++----
>  drivers/bus/fsl-mc/fsl-mc-allocator.c |  12 +-
>  drivers/bus/fsl-mc/fsl-mc-bus.c       |  64 ++++++++-
>  drivers/bus/fsl-mc/fsl-mc-private.h   |  31 ++---
>  drivers/bus/fsl-mc/mc-io.c            |   7 +-
>  include/linux/fsl/mc.h                |  41 +++++-
>  7 files changed, 359 insertions(+), 127 deletions(-)
> 

For the series:
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@....com>
Acked-by: Laurentiu Tudor <laurentiu.tudor@....com>

---
Best Regards, Laurentiu