linux-kernel - Re: [PATCH v3 0/7] Add Aspeed SSIF BMC driver

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Date:   Wed, 19 May 2021 07:34:01 -0500
From:   Corey Minyard <minyard@....org>
To:     Quan Nguyen <quan@...amperecomputing.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Wolfram Sang <wsa@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        openipmi-developer@...ts.sourceforge.net,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org,
        Open Source Submission <patches@...erecomputing.com>,
        Phong Vo <phong@...amperecomputing.com>,
        "Thang Q . Nguyen" <thang@...amperecomputing.com>,
        openbmc@...ts.ozlabs.org
Subject: Re: [PATCH v3 0/7] Add Aspeed SSIF BMC driver

On Wed, May 19, 2021 at 02:49:27PM +0700, Quan Nguyen wrote:
> This series add support for the Aspeed specific SSIF BMC driver which
> is to perform in-band IPMI communication with the host in management
> (BMC) side.
> 
> v3:
>   + Switched binding doc to use DT schema format [Rob]
>   + Splited into generic ssif_bmc and aspeed-specific [Corey, Joel]
>   + Removed redundant license info [Joel]
>   + Switched to use traditional if-else [Joel]
>   + Removed unused ssif_bmc_ioctl() [Joel]
>   + Made handle_request()/complete_response() to return void [Joel]
>   + Refactored send_ssif_bmc_response()/receive_ssif_bmc_request() [Corey]
>   + Remove mutex [Corey]
>   + Use spin_lock/unlock_irqsave/restore in callback [Corey]
>   + Removed the unnecessary memset [Corey]
>   + Switch to use dev_err() [Corey]
>   + Combine mask/unmask two interrupts together [Corey]
>   + Fixed unhandled Tx done with NAK [Quan]
>   + Late ack'ed Tx done w/wo Ack irq [Quan]
>   + Use aspeed-specific exported aspeed_set_slave_busy() when slave busy
> to fix the deadlock [Graeme, Philipp, Quan]
>   + Clean buffer for last multipart read [Quan]
>   + Handle unknown incoming command [Quan]
> 
> v2:
>   + Fixed compiling error with COMPILE_TEST for arc
> 
> Quan Nguyen (7):
>   i2c: i2c-core-smbus: Expose PEC calculate function for generic use

Note that for this I2C-specific change, I will need acks from the I2C
maintainers to be able to include this in my tree.

>   ipmi: ssif_bmc: Add SSIF BMC driver
>   i2c: aspeed: Fix unhandled Tx done with NAK

For the aspeed changes, they don't really belong here, they belong in
the aspeed tree.  I see that you need them for the device to work
correctly, though.  I'll need acks from maintainers to include them.

>   i2c: aspeed: Acknowledge Tx done w/wo ACK irq late
>   i2c: aspeed: Add aspeed_set_slave_busy()
>   ipmi: ssif_bmc: Add Aspeed SSIF BMC driver
>   bindings: ipmi: Add binding for Aspeed SSIF BMC driver
> 
>  .../bindings/ipmi/aspeed-ssif-bmc.yaml        |  33 +
>  drivers/char/ipmi/Kconfig                     |  22 +
>  drivers/char/ipmi/Makefile                    |   2 +
>  drivers/char/ipmi/ssif_bmc.c                  | 605 ++++++++++++++++++
>  drivers/char/ipmi/ssif_bmc.h                  |  93 +++
>  drivers/char/ipmi/ssif_bmc_aspeed.c           |  75 +++
>  drivers/i2c/busses/i2c-aspeed.c               |  51 +-
>  drivers/i2c/i2c-core-smbus.c                  |  12 +-
>  include/linux/i2c.h                           |   1 +
>  9 files changed, 884 insertions(+), 10 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/ipmi/aspeed-ssif-bmc.yaml
>  create mode 100644 drivers/char/ipmi/ssif_bmc.c
>  create mode 100644 drivers/char/ipmi/ssif_bmc.h
>  create mode 100644 drivers/char/ipmi/ssif_bmc_aspeed.c
> 
> -- 
> 2.28.0
>