From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=vyQW=4M=lists.01.org=linux-nvdimm-bounces@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS
	autolearn=unavailable autolearn_force=no version=3.4.0
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 9D34DC3567B
	for <linux-nvdimm@archiver.kernel.org>; Mon, 24 Feb 2020 05:37:07 +0000 (UTC)
Received: from ml01.01.org (ml01.01.org [198.145.21.10])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by mail.kernel.org (Postfix) with ESMTPS id 3CC0E20836
	for <linux-nvdimm@archiver.kernel.org>; Mon, 24 Feb 2020 05:37:07 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3CC0E20836
Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=au1.ibm.com
Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org
Received: from ml01.vlan13.01.org (localhost [IPv6:::1])
	by ml01.01.org (Postfix) with ESMTP id DEC0310FC3413;
	Sun, 23 Feb 2020 21:37:58 -0800 (PST)
Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=alastair@au1.ibm.com; receiver=<UNKNOWN> 
Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by ml01.01.org (Postfix) with ESMTPS id 6351810FC340D
	for <linux-nvdimm@lists.01.org>; Sun, 23 Feb 2020 21:37:55 -0800 (PST)
Received: from pps.filterd (m0098399.ppops.net [127.0.0.1])
	by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01O5T5L1049247
	for <linux-nvdimm@lists.01.org>; Mon, 24 Feb 2020 00:37:02 -0500
Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100])
	by mx0a-001b2d01.pphosted.com with ESMTP id 2yb1b6tfy1-1
	(version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT)
	for <linux-nvdimm@lists.01.org>; Mon, 24 Feb 2020 00:37:02 -0500
Received: from localhost
	by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted
	for <linux-nvdimm@lists.01.org> from <alastair@au1.ibm.com>;
	Mon, 24 Feb 2020 05:36:59 -0000
Received: from b06avi18626390.portsmouth.uk.ibm.com (9.149.26.192)
	by e06smtp04.uk.ibm.com (192.168.101.134) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted;
	(version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256)
	Mon, 24 Feb 2020 05:36:52 -0000
Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58])
	by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01O5ZtQ041026038
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK);
	Mon, 24 Feb 2020 05:35:55 GMT
Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1])
	by IMSVA (Postfix) with ESMTP id E1EAE4C040;
	Mon, 24 Feb 2020 05:36:51 +0000 (GMT)
Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1])
	by IMSVA (Postfix) with ESMTP id 3831A4C04E;
	Mon, 24 Feb 2020 05:36:51 +0000 (GMT)
Received: from ozlabs.au.ibm.com (unknown [9.192.253.14])
	by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP;
	Mon, 24 Feb 2020 05:36:51 +0000 (GMT)
Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114])
	(using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 8D3FDA00E5;
	Mon, 24 Feb 2020 16:36:46 +1100 (AEDT)
Subject: Re: [PATCH v3 06/27] ocxl: Tally up the LPC memory on a link &
 allow it to be mapped
From: "Alastair D'Silva" <alastair@au1.ibm.com>
To: Andrew Donnellan <ajd@linux.ibm.com>
Date: Mon, 24 Feb 2020 16:36:49 +1100
In-Reply-To: <8a6eaedd-d806-9111-84ac-c4961227d69c@linux.ibm.com>
References: <20200221032720.33893-1-alastair@au1.ibm.com>
	 <20200221032720.33893-7-alastair@au1.ibm.com>
	 <8a6eaedd-d806-9111-84ac-c4961227d69c@linux.ibm.com>
Organization: IBM Australia
User-Agent: Evolution 3.34.3 (3.34.3-1.fc31) 
MIME-Version: 1.0
X-TM-AS-GCONF: 00
x-cbid: 20022405-0016-0000-0000-000002E9A6ED
X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused
x-cbparentid: 20022405-0017-0000-0000-0000334CCC78
Message-Id: <a682c49c96e49e20e78bb97d59b596e65d02b454.camel@au1.ibm.com>
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572
 definitions=2020-02-24_01:2020-02-21,2020-02-24 signatures=0
X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxscore=0
 malwarescore=0 phishscore=0 mlxlogscore=962 lowpriorityscore=0 bulkscore=0
 adultscore=0 impostorscore=0 clxscore=1015 priorityscore=1501
 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1
 engine=8.12.0-2001150001 definitions=main-2002240046
Message-ID-Hash: HB5PQ3U4BBBSDADSSDLRPTI73QQPBAF5
X-Message-ID-Hash: HB5PQ3U4BBBSDADSSDLRPTI73QQPBAF5
X-MailFrom: alastair@au1.ibm.com
X-Mailman-Rule-Hits: nonmember-moderation
X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation
CC: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, Frederic Barrat <fbarrat@linux.ibm.com>, Arnd Bergmann <arnd@arndb.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Andrew Morton <akpm@linux-foundation.org>, Mauro Carvalho Chehab <mchehab+samsung@kernel.org>, "David S. Miller" <davem@davemloft.net>, Rob Herring <robh@kernel.org>, Anton Blanchard <anton@ozlabs.org>, Krzysztof Kozlowski <krzk@kernel.org>, Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>, Madhavan Srinivasan <maddy@linux.vnet.ibm.com>, =?ISO-8859-1?Q?C=E9dric?= Le Goater <clg@kaod.org>, Anju T Sudhakar <anju@linux.vnet.ibm.com>, Hari Bathini <hbathini@linux.ibm.com>, Thomas Gleixner <tglx@linutronix.de>, Greg Kurz <groug@kaod.org>, Nicholas Piggin <npiggin@gmail.com>, Masahiro Yamada <yamada.masahiro@socionext.com>, Alexey Kardashevskiy <aik@ozlabs.ru>, linux-kernel@vger.kernel.org, linuxp
 pc-dev@lists.ozlabs.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org
X-Mailman-Version: 3.1.1
Precedence: list
List-Id: "Linux-nvdimm developer list." <linux-nvdimm.lists.01.org>
Archived-At: <https://lists.01.org/hyperkitty/list/linux-nvdimm@lists.01.org/message/HB5PQ3U4BBBSDADSSDLRPTI73QQPBAF5/>
List-Archive: <https://lists.01.org/hyperkitty/list/linux-nvdimm@lists.01.org/>
List-Help: <mailto:linux-nvdimm-request@lists.01.org?subject=help>
List-Post: <mailto:linux-nvdimm@lists.01.org>
List-Subscribe: <mailto:linux-nvdimm-join@lists.01.org>
List-Unsubscribe: <mailto:linux-nvdimm-leave@lists.01.org>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

On Mon, 2020-02-24 at 16:25 +1100, Andrew Donnellan wrote:
> On 21/2/20 2:26 pm, Alastair D'Silva wrote:
> > From: Alastair D'Silva <alastair@d-silva.org>
> > 
> > Tally up the LPC memory on an OpenCAPI link & allow it to be mapped
> > 
> > Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
> 
> This commit message is a bit short and could do with some further 
> explanation.
> 
> In particular - it's worth explaining why the tracking of available
> LPC 
> memory needs to be done at a link level, because a single OpenCAPI
> card 
> can have multiple PCI functions, each with multiple AFUs which define
> an 
> amount of LPC memory they have, even if the common case is expected
> to 
> be a single function with a single AFU and thus one LPC area per
> link.

Ok

> 
> Snowpatch has a few checkpatch issues to report:
> 
> https://openpower.xyz/job/snowpatch/job/snowpatch-linux-checkpatch/11800//artifact/linux/checkpatch.log
> 

Gah, I could have sworn I ran checkpatch against this :/

> The code generally looks okay to me.
> 
> > diff --git a/drivers/misc/ocxl/ocxl_internal.h
> > b/drivers/misc/ocxl/ocxl_internal.h
> > index 198e4e4bc51d..d0c8c4838f42 100644
> > --- a/drivers/misc/ocxl/ocxl_internal.h
> > +++ b/drivers/misc/ocxl/ocxl_internal.h
> > @@ -142,4 +142,37 @@ int ocxl_irq_offset_to_id(struct ocxl_context
> > *ctx, u64 offset);
> >   u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id);
> >   void ocxl_afu_irq_free_all(struct ocxl_context *ctx);
> >   
> > +/**
> > + * ocxl_link_add_lpc_mem() - Increment the amount of memory
> > required by an OpenCAPI link
> > + *
> > + * @link_handle: The OpenCAPI link handle
> > + * @offset: The offset of the memory to add
> > + * @size: The amount of memory to increment by
> > + *
> > + * Returns 0 on success, negative on overflow
> > + */
> 
> I think "amount of memory required" isn't the best way to express
> this.
> 
> Might as well explicitly say -EINVAL on overflow.
> 

Ok

-- 
Alastair D'Silva
Open Source Developer
Linux Technology Centre, IBM Australia
mob: 0423 762 819
_______________________________________________
Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org
To unsubscribe send an email to linux-nvdimm-leave@lists.01.org