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From: Gabriele Paoloni <gabriele.paoloni@huawei.com>
To: Sinan Kaya <okaya@codeaurora.org>,
	"liudongdong (C)" <liudongdong3@huawei.com>,
	"helgaas@kernel.org" <helgaas@kernel.org>,
	"arnd@arndb.de" <arnd@arndb.de>,
	"will.deacon@arm.com" <will.deacon@arm.com>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"rafael@kernel.org" <rafael@kernel.org>,
	"hanjun.guo@linaro.org" <hanjun.guo@linaro.org>,
	"Lorenzo.Pieralisi@arm.com" <Lorenzo.Pieralisi@arm.com>,
	"jchandra@broadcom.com" <jchandra@broadcom.com>,
	"tn@semihalf.com" <tn@semihalf.com>
Cc: "robert.richter@caviumnetworks.com" 
	<robert.richter@caviumnetworks.com>,
	"mw@semihalf.com" <mw@semihalf.com>,
	"Liviu.Dudau@arm.com" <Liviu.Dudau@arm.com>,
	"ddaney@caviumnetworks.com" <ddaney@caviumnetworks.com>,
	Wangyijing <wangyijing@huawei.com>,
	"Suravee.Suthikulpanit@amd.com" <Suravee.Suthikulpanit@amd.com>,
	"msalter@redhat.com" <msalter@redhat.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linaro-acpi@lists.linaro.org" <linaro-acpi@lists.linaro.org>,
	"jcm@redhat.com" <jcm@redhat.com>,
	"andrea.gallo@linaro.org" <andrea.gallo@linaro.org>,
	"dhdang@apm.com" <dhdang@apm.com>,
	"jeremy.linton@arm.com" <jeremy.linton@arm.com>,
	"cov@codeaurora.org" <cov@codeaurora.org>,
	"Chenxin (Charles)" <charles.chenxin@huawei.com>,
	Linuxarm <linuxarm@huawei.com>
Subject: RE: [RFC PATCH V2 1/2] ACPI/PCI: Match PCI config space accessors against platfrom specific ECAM quirks
Date: Mon, 13 Jun 2016 14:29:01 +0000	[thread overview]
Message-ID: <EE11001F9E5DDD47B7634E2F8A612F2E1F782E15@lhreml507-mbx> (raw)
In-Reply-To: <575EBD13.8080808@codeaurora.org>

Hi Sinan

> -----Original Message-----
> From: Sinan Kaya [mailto:okaya@codeaurora.org]
> Sent: 13 June 2016 15:03
> To: Gabriele Paoloni; liudongdong (C); helgaas@kernel.org;
> arnd@arndb.de; will.deacon@arm.com; catalin.marinas@arm.com;
> rafael@kernel.org; hanjun.guo@linaro.org; Lorenzo.Pieralisi@arm.com;
> jchandra@broadcom.com; tn@semihalf.com
> Cc: robert.richter@caviumnetworks.com; mw@semihalf.com;
> Liviu.Dudau@arm.com; ddaney@caviumnetworks.com; Wangyijing;
> Suravee.Suthikulpanit@amd.com; msalter@redhat.com; linux-
> pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> acpi@vger.kernel.org; linux-kernel@vger.kernel.org; linaro-
> acpi@lists.linaro.org; jcm@redhat.com; andrea.gallo@linaro.org;
> dhdang@apm.com; jeremy.linton@arm.com; cov@codeaurora.org; Chenxin
> (Charles); Linuxarm
> Subject: Re: [RFC PATCH V2 1/2] ACPI/PCI: Match PCI config space
> accessors against platfrom specific ECAM quirks
> 
> On 6/13/2016 9:54 AM, Gabriele Paoloni wrote:
> > As you can see here Liudongdong has replaced oem_revision with
> > oem_table_id.
> >
> > Now it seems that there are some platforms that have already shipped
> > using a matching based on the oem_revision (right Jon?)
> >
> > However I guess that if in FW they have defined oem_table_id properly
> > they should be able to use this mechanism without needing to a FW
> update.
> >
> > Can these vendors confirm this?
> >
> > Tomasz do you think this can work for Cavium Thunder?
> >
> > Thanks
> >
> > Gab
> 
> Why not have all three of them?
> 
> The initial approach was OEM id and revision id.
> 
> Jeff Hugo indicated that addition (not removing any other fields) of
> table id
> would make more sense.

Mmm from last email of Jeff Hugo on "[RFC PATCH 1/3] pci, acpi: Match
PCI config space accessors against platfrom specific ECAM quirks."

I quote:

 "Using the OEM revision 
 field does not seem to be appropriate since these are different 
 platforms and the revision field appears to be for the purpose of 
 tracking differences within a single platform.  Therefore, Cov is 
 proposing using the OEM table id as a mechanism to distinguish
 platform A (needs quirk applied) vs platform B (no quirks) from the
 same OEM."

So it looks to me that he pointed out that using the OEM revision field
is wrong...and this is why I have asked if replacing it with the table
id can work for other vendors....

Thanks

Gab


> 
> --
> Sinan Kaya
> Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center,
> Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a
> Linux Foundation Collaborative Project

  reply	other threads:[~2016-06-13 14:30 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-13 13:02 [RFC PATCH V2 0/2] ECAM quirks handling for ARM64 platforms Dongdong Liu
2016-06-13 13:02 ` [RFC PATCH V2 1/2] ACPI/PCI: Match PCI config space accessors against platfrom specific ECAM quirks Dongdong Liu
2016-06-13 13:54   ` Gabriele Paoloni
2016-06-13 14:02     ` Sinan Kaya
2016-06-13 14:29       ` Gabriele Paoloni [this message]
2016-06-13 15:12         ` okaya
2016-06-13 15:59           ` Jeffrey Hugo
2016-06-13 21:07             ` Duc Dang
2016-06-16  6:31     ` [Linaro-acpi] " Jon Masters
2016-06-16  7:45       ` Duc Dang
2016-06-16  7:54         ` Jon Masters
2016-06-13 15:47   ` Christopher Covington
2016-06-13 20:57     ` Duc Dang
2016-06-14  5:51       ` Dongdong Liu
2016-06-14  9:00         ` Duc Dang
2016-06-14  9:45           ` Dongdong Liu
2016-06-14 11:52             ` Tomasz Nowicki
2016-06-14 17:43               ` Duc Dang
2016-06-13 13:02 ` [RFC PATCH V2 2/2] ARM64/PCI: Start using quirks handling for ACPI based PCI host controller Dongdong Liu

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