From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 49C3B1B39D; Fri, 12 Apr 2019 19:29:50 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Apr 2019 10:29:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,342,1549958400"; d="scan'208";a="163918784" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by fmsmga001.fm.intel.com with ESMTP; 12 Apr 2019 10:29:47 -0700 From: Ferruh Yigit To: "Ananyev, Konstantin" , Stephen Hemminger , "Richardson, Bruce" Cc: 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> 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: <0c9b3ee9-4bc4-4ab0-7678-4827538dda3a@intel.com> 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: Fri, 12 Apr 2019 17:29:51 -0000 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. 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 0E593A0096 for ; Fri, 12 Apr 2019 19:29:55 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 6C2681B3A1; Fri, 12 Apr 2019 19:29:52 +0200 (CEST) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 49C3B1B39D; Fri, 12 Apr 2019 19:29:50 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Apr 2019 10:29:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,342,1549958400"; d="scan'208";a="163918784" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by fmsmga001.fm.intel.com with ESMTP; 12 Apr 2019 10:29:47 -0700 From: Ferruh Yigit To: "Ananyev, Konstantin" , Stephen Hemminger , "Richardson, Bruce" Cc: 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> 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: <0c9b3ee9-4bc4-4ab0-7678-4827538dda3a@intel.com> 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: <20190412172946.JLKtPho03256xKCBkIs1j3p_SwAbzswIj5zeWb1LgA4@z> 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.