From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 9AF2F1B39C; Mon, 15 Apr 2019 18:00:21 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Apr 2019 09:00:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,354,1549958400"; d="scan'208";a="134521107" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by orsmga008.jf.intel.com with ESMTP; 15 Apr 2019 09:00:17 -0700 To: Stephen Hemminger Cc: "Ananyev, Konstantin" , "Richardson, Bruce" , David Christensen , "thomas@monjalon.net" , "arybchenko@solarflare.com" , "dev@dpdk.org" , "radhika.chirra@ibm.com" , "stable@dpdk.org" References: <1554927376-93022-1-git-send-email-drc@linux.vnet.ibm.com> <20190410210017.GA742@bricha3-MOBL.ger.corp.intel.com> <20190410160818.78855564@shemminger-XPS-13-9360> <88e75c95-b2d3-ca28-b4f3-d27d0c7d6e99@intel.com> <2601191342CEEE43887BDE71AB9772580148A96EA6@irsmsx105.ger.corp.intel.com> <0c9b3ee9-4bc4-4ab0-7678-4827538dda3a@intel.com> <6aa39725-2827-6ce0-e406-27ac44a2132b@intel.com> <20190412143131.211ba764@shemminger-XPS-13-9360> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190412143131.211ba764@shemminger-XPS-13-9360> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH] ethdev: missing typecast from void in eth_dev_pci_specific_init X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Apr 2019 16:00:22 -0000 On 4/12/2019 10:31 PM, Stephen Hemminger wrote: > On Fri, 12 Apr 2019 18:29:46 +0100 > Ferruh Yigit wrote: > >> On 4/12/2019 6:25 PM, Ferruh Yigit wrote: >>> On 4/12/2019 6:15 PM, Ananyev, Konstantin wrote: >>>> >>>> >>>>> -----Original Message----- >>>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ferruh Yigit >>>>> Sent: Friday, April 12, 2019 6:09 PM >>>>> To: Stephen Hemminger ; Richardson, Bruce >>>>> Cc: David Christensen ; thomas@monjalon.net; arybchenko@solarflare.com; dev@dpdk.org; >>>>> radhika.chirra@ibm.com; stable@dpdk.org >>>>> Subject: Re: [dpdk-dev] [PATCH] ethdev: missing typecast from void in eth_dev_pci_specific_init >>>>> >>>>> On 4/11/2019 12:08 AM, Stephen Hemminger wrote: >>>>>> On Wed, 10 Apr 2019 22:00:18 +0100 >>>>>> Bruce Richardson wrote: >>>>>> >>>>>>> On Wed, Apr 10, 2019 at 03:16:16PM -0500, David Christensen wrote: >>>>>>>> The function eth_dev_pci_specific_init is missing a typecast to >>>>>>>> (struct rte_pci_device *) for the input argument bus_device. >>>>>>>> >>>>>>>> Cc: stable@dpdk.org >>>>>>>> >>>>>>>> Signed-off-by: David Christensen >>>>>>>> Tested-by: Radhika Chirra >>>>>>>> --- >>>>>>>> lib/librte_ethdev/rte_ethdev_pci.h | 2 +- >>>>>>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>>>>>> >>>>>>>> diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h >>>>>>>> index 23257e9..a325311 100644 >>>>>>>> --- a/lib/librte_ethdev/rte_ethdev_pci.h >>>>>>>> +++ b/lib/librte_ethdev/rte_ethdev_pci.h >>>>>>>> @@ -72,7 +72,7 @@ >>>>>>>> >>>>>>>> static inline int >>>>>>>> eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device) { >>>>>>>> - struct rte_pci_device *pci_dev = bus_device; >>>>>>>> + struct rte_pci_device *pci_dev = (struct rte_pci_device *)bus_device; >>>>>>>> >>>>>>> >>>>>>> Is this needed for building some C++ apps that are including the header >>>>>>> file (directly, or indirectly), because for pure C, "void *" types should >>>>>>> be assignable to any other pointer type without casting? >>>>>>> >>>>>>> /Bruce >>>>>> >>>>>> Another example of Why the Hell is this inline? >>>>>> >>>>> >>>>> It has been done inline intentionally at the time as far as remember, this >>>>> header is for drivers not for applications, it has helper functions. >>>>> >>>>> The common code from drivers related to the bus put into header files, so the >>>>> code itself belongs to drivers not ethdev and reduces duplicates in them. >>>> >>>> Ok that's the common code used by the drivers... >>>> But why it still can't be in .c file? >>> >>> When it is in .c file, it will be either in ethdev library, single location in >>> .c file and binary file, but location is not exactly right, because code belongs >>> to drivers. >>> Or code should be in .c files of each drivers, this will be code duplication. >>> >>> Having in .h file makes code in single place, but when compiled code will be in >>> each driver object file/ library. >>> >>> Of course it works when put into a .c file in ehtdev, but bus (pci and vdev) >>> related code are not belongs to ethdev library and I believe shouldn't be part >>> of ethdev binary. And those bus helper headers are only for drivers to include, >>> so having inline shouldn't be a problem at all because there is not stability >>> concern in that interface. >>> >> >> btw, if you put those into .c file in ethdev, you will be creating a dependency >> from ethdev to bus code, to all available buses which will make impossible to >> disable any bus type if you use ethdev. > > The problem I see is rte_ethdev_pci.h, it should be headers only and then put > code rte_ethdev_pci.c > Where this 'rte_ethdev_pci.c' should be? Because of reasons explained above, ehtdev is not good place. Perhaps a 'common' folder for net drivers may work, create a 'rte_ethdev_pci.o' and link it with relevant drivers.? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 6569EA00E6 for ; Mon, 15 Apr 2019 18:00:25 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 2372C1B39D; Mon, 15 Apr 2019 18:00:24 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 9AF2F1B39C; Mon, 15 Apr 2019 18:00:21 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Apr 2019 09:00:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,354,1549958400"; d="scan'208";a="134521107" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by orsmga008.jf.intel.com with ESMTP; 15 Apr 2019 09:00:17 -0700 To: Stephen Hemminger Cc: "Ananyev, Konstantin" , "Richardson, Bruce" , David Christensen , "thomas@monjalon.net" , "arybchenko@solarflare.com" , "dev@dpdk.org" , "radhika.chirra@ibm.com" , "stable@dpdk.org" References: <1554927376-93022-1-git-send-email-drc@linux.vnet.ibm.com> <20190410210017.GA742@bricha3-MOBL.ger.corp.intel.com> <20190410160818.78855564@shemminger-XPS-13-9360> <88e75c95-b2d3-ca28-b4f3-d27d0c7d6e99@intel.com> <2601191342CEEE43887BDE71AB9772580148A96EA6@irsmsx105.ger.corp.intel.com> <0c9b3ee9-4bc4-4ab0-7678-4827538dda3a@intel.com> <6aa39725-2827-6ce0-e406-27ac44a2132b@intel.com> <20190412143131.211ba764@shemminger-XPS-13-9360> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190412143131.211ba764@shemminger-XPS-13-9360> Content-Type: text/plain; charset="UTF-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH] ethdev: missing typecast from void in eth_dev_pci_specific_init X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190415160017.CjJxQ7Rdn99QSprC1Y0z4EayhHzmfYFn0GX4kIMIJ7k@z> On 4/12/2019 10:31 PM, Stephen Hemminger wrote: > On Fri, 12 Apr 2019 18:29:46 +0100 > Ferruh Yigit wrote: > >> On 4/12/2019 6:25 PM, Ferruh Yigit wrote: >>> On 4/12/2019 6:15 PM, Ananyev, Konstantin wrote: >>>> >>>> >>>>> -----Original Message----- >>>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ferruh Yigit >>>>> Sent: Friday, April 12, 2019 6:09 PM >>>>> To: Stephen Hemminger ; Richardson, Bruce >>>>> Cc: David Christensen ; thomas@monjalon.net; arybchenko@solarflare.com; dev@dpdk.org; >>>>> radhika.chirra@ibm.com; stable@dpdk.org >>>>> Subject: Re: [dpdk-dev] [PATCH] ethdev: missing typecast from void in eth_dev_pci_specific_init >>>>> >>>>> On 4/11/2019 12:08 AM, Stephen Hemminger wrote: >>>>>> On Wed, 10 Apr 2019 22:00:18 +0100 >>>>>> Bruce Richardson wrote: >>>>>> >>>>>>> On Wed, Apr 10, 2019 at 03:16:16PM -0500, David Christensen wrote: >>>>>>>> The function eth_dev_pci_specific_init is missing a typecast to >>>>>>>> (struct rte_pci_device *) for the input argument bus_device. >>>>>>>> >>>>>>>> Cc: stable@dpdk.org >>>>>>>> >>>>>>>> Signed-off-by: David Christensen >>>>>>>> Tested-by: Radhika Chirra >>>>>>>> --- >>>>>>>> lib/librte_ethdev/rte_ethdev_pci.h | 2 +- >>>>>>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>>>>>> >>>>>>>> diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h >>>>>>>> index 23257e9..a325311 100644 >>>>>>>> --- a/lib/librte_ethdev/rte_ethdev_pci.h >>>>>>>> +++ b/lib/librte_ethdev/rte_ethdev_pci.h >>>>>>>> @@ -72,7 +72,7 @@ >>>>>>>> >>>>>>>> static inline int >>>>>>>> eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device) { >>>>>>>> - struct rte_pci_device *pci_dev = bus_device; >>>>>>>> + struct rte_pci_device *pci_dev = (struct rte_pci_device *)bus_device; >>>>>>>> >>>>>>> >>>>>>> Is this needed for building some C++ apps that are including the header >>>>>>> file (directly, or indirectly), because for pure C, "void *" types should >>>>>>> be assignable to any other pointer type without casting? >>>>>>> >>>>>>> /Bruce >>>>>> >>>>>> Another example of Why the Hell is this inline? >>>>>> >>>>> >>>>> It has been done inline intentionally at the time as far as remember, this >>>>> header is for drivers not for applications, it has helper functions. >>>>> >>>>> The common code from drivers related to the bus put into header files, so the >>>>> code itself belongs to drivers not ethdev and reduces duplicates in them. >>>> >>>> Ok that's the common code used by the drivers... >>>> But why it still can't be in .c file? >>> >>> When it is in .c file, it will be either in ethdev library, single location in >>> .c file and binary file, but location is not exactly right, because code belongs >>> to drivers. >>> Or code should be in .c files of each drivers, this will be code duplication. >>> >>> Having in .h file makes code in single place, but when compiled code will be in >>> each driver object file/ library. >>> >>> Of course it works when put into a .c file in ehtdev, but bus (pci and vdev) >>> related code are not belongs to ethdev library and I believe shouldn't be part >>> of ethdev binary. And those bus helper headers are only for drivers to include, >>> so having inline shouldn't be a problem at all because there is not stability >>> concern in that interface. >>> >> >> btw, if you put those into .c file in ethdev, you will be creating a dependency >> from ethdev to bus code, to all available buses which will make impossible to >> disable any bus type if you use ethdev. > > The problem I see is rte_ethdev_pci.h, it should be headers only and then put > code rte_ethdev_pci.c > Where this 'rte_ethdev_pci.c' should be? Because of reasons explained above, ehtdev is not good place. Perhaps a 'common' folder for net drivers may work, create a 'rte_ethdev_pci.o' and link it with relevant drivers.?