Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
IronPort-SDR: shogr55uKjX0hw9bV0gHLAA3uaMiPx1A0HPThP/KYQKBgMMPLbUruKTTyZM6SHoAUsgrV0NYxh
 w9HIkNk9ZQeu3G6MdQ8DLFg5YoWglmAoiljKyHLTksFEkCVOt+erI0D2W2EuakkApfL2IjT1Rg
 759ycYjeeT/kzP8mET5w+2HjbBzW3d7/Rf8gWrjeXH+yxo8dq0h5uFlCT7CyBftZ8LJxWGj1Zq
 B04qde4BfAVxcWQdR92RntGTxAw+XvdDZDE7fi6yiY2/cPPpxMOhDhniVzsg36QOqcNsg/JJu+
 /VEOeJ7to75YGW3qIcuAhlgI
IronPort-SDR: yFuyKbA9vWewem8PFOina5l2LLLRp2ybKK7jjZybWZAOeqEV00v00X3pCEQQoEHh1pKukYlJYX
 ZzLh/1Jqie9MEFPTfFjkD+YUbQOWLveFwZm2gjJtlEQw17M0M8hFR1RFfsUeIF0GMPTuYrpTnx
 xYmoQE8FGqqXEv1X59d6Mpk3wBMCxviaRyv8sM3jKC+XsxV1r8xYFSV8kUs6P6zrEF21sa5tzv
 7z4nUJcwl7UzsDqXyRMA0KSlhsXyJbOCACLsklMpayxJdNIMeIqi63YWeP8kbmeWyCjDLgY9s/
 g+8=
WDCIronportException: Internal
Message-ID: <d06e9910-527e-cfa2-f2df-737fb4799fe5@opensource.wdc.com>
Date:   Tue, 14 Jun 2022 17:32:41 +0900
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.10.0
Subject: Re: [PATCH v4 12/23] ata: libahci: Extend port-cmd flags set with
 port capabilities
Content-Language: en-US
To:     Serge Semin <Sergey.Semin@baikalelectronics.ru>,
        Hans de Goede <hdegoede@redhat.com>,
        Jens Axboe <axboe@kernel.dk>, Hannes Reinecke <hare@suse.de>
Cc:     Serge Semin <fancer.lancer@gmail.com>,
        Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
        Rob Herring <robh+dt@kernel.org>, linux-ide@vger.kernel.org,
        linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
References: <20220610081801.11854-1-Sergey.Semin@baikalelectronics.ru>
 <20220610081801.11854-13-Sergey.Semin@baikalelectronics.ru>
From:   Damien Le Moal <damien.lemoal@opensource.wdc.com>
Organization: Western Digital Research
In-Reply-To: <20220610081801.11854-13-Sergey.Semin@baikalelectronics.ru>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 6/10/22 17:17, Serge Semin wrote:
> Currently not all of the Port-specific capabilities listed in the

s/listed/are listed

> PORT_CMD-enumeration. Let's extend that set with the Cold Presence
> Detection and Mechanical Presence Switch attached to the Port flags [1] so
> to closeup the set of the platform-specific port-capabilities flags.  Note
> these flags are supposed to be set by the platform firmware if there is
> one. Alternatively as we are about to do they can be set by means of the
> OF properties.
> 
> While at it replace PORT_IRQ_DEV_ILCK with PORT_IRQ_DMPS and fix the
> comment there. In accordance with [2] that IRQ flag is supposed to
> indicate the state of the signal coming from the Mechanical Presence
> Switch.
> 
> [1] Serial ATA AHCI 1.3.1 Specification, p.27
> [2] Serial ATA AHCI 1.3.1 Specification, p.24, p.88
> 
> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
> Reviewed-by: Hannes Reinecke <hare@suse.de>
> 
> ---
> 
> Changelog v4:
> - Fix the DMPS macros name in the patch log. (@Sergei Shtylyov)
> ---
>  drivers/ata/ahci.h | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
> index 7d834deefeb9..f501531bd1b3 100644
> --- a/drivers/ata/ahci.h
> +++ b/drivers/ata/ahci.h
> @@ -138,7 +138,7 @@ enum {
>  	PORT_IRQ_BAD_PMP	= (1 << 23), /* incorrect port multiplier */
>  
>  	PORT_IRQ_PHYRDY		= (1 << 22), /* PhyRdy changed */
> -	PORT_IRQ_DEV_ILCK	= (1 << 7), /* device interlock */
> +	PORT_IRQ_DMPS		= (1 << 7), /* mechanical presence status */
>  	PORT_IRQ_CONNECT	= (1 << 6), /* port connect change status */
>  	PORT_IRQ_SG_DONE	= (1 << 5), /* descriptor processed */
>  	PORT_IRQ_UNK_FIS	= (1 << 4), /* unknown FIS rx'd */
> @@ -166,6 +166,8 @@ enum {
>  	PORT_CMD_ATAPI		= (1 << 24), /* Device is ATAPI */
>  	PORT_CMD_FBSCP		= (1 << 22), /* FBS Capable Port */
>  	PORT_CMD_ESP		= (1 << 21), /* External Sata Port */
> +	PORT_CMD_CPD		= (1 << 20), /* Cold Presence Detection */
> +	PORT_CMD_MPSP		= (1 << 19), /* Mechanical Presence Switch */
>  	PORT_CMD_HPCP		= (1 << 18), /* HotPlug Capable Port */
>  	PORT_CMD_PMP		= (1 << 17), /* PMP attached */
>  	PORT_CMD_LIST_ON	= (1 << 15), /* cmd list DMA engine running */
> @@ -181,6 +183,9 @@ enum {
>  	PORT_CMD_ICC_PARTIAL	= (0x2 << 28), /* Put i/f in partial state */
>  	PORT_CMD_ICC_SLUMBER	= (0x6 << 28), /* Put i/f in slumber state */
>  
> +	PORT_CMD_CAP		= PORT_CMD_HPCP | PORT_CMD_MPSP |
> +				  PORT_CMD_CPD | PORT_CMD_ESP | PORT_CMD_FBSCP,

What is this one for ? A comment above it would be nice.

> +
>  	/* PORT_FBS bits */
>  	PORT_FBS_DWE_OFFSET	= 16, /* FBS device with error offset */
>  	PORT_FBS_ADO_OFFSET	= 12, /* FBS active dev optimization offset */


-- 
Damien Le Moal
Western Digital Research