Date: Mon, 23 Jun 2025 07:09:12 +0000 From: =?utf-8?B?SsOpcsOpbWllIEpPVVJESU4=?= <jeremie.jourdin@advens.fr> To: =?utf-8?B?0K/RgNC+0YHQu9Cw0LIg0JzQsNGI0LrQvg==?= <yaroslaw.mashko@gmail.com> Cc: "freebsd-hackers@FreeBSD.org" <freebsd-hackers@freebsd.org> Subject: Re: FreeBSD-native CAN Stack and AF_CAN Protocol Family Message-ID: <PAYP264MB35185F5D692E54300C95594BFD79A@PAYP264MB3518.FRAP264.PROD.OUTLOOK.COM> In-Reply-To: <CAMVwyxLnqsw49zhcPjHHEuLLgGc7-yUdgYPN53ABzjE=aPnFyQ@mail.gmail.com> References: <PAYP264MB351822F6E68D313174A1C0F3FD7CA@PAYP264MB3518.FRAP264.PROD.OUTLOOK.COM> <CAMVwyxLnqsw49zhcPjHHEuLLgGc7-yUdgYPN53ABzjE=aPnFyQ@mail.gmail.com>
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[-- Attachment #1 --] Hello, My CAN controller reports itself as « AHC0512 ». It is exposed via ACPI and is allocated with a classic bus_alloc_resource as SYS_RES_IOPORT. For now, bit timing parameters are hardcoded in my driver, and that’s precisely why I want to progress with adding support for socket CAN into the kernel. This will make it possible to configure the CAN interface using « ifconfig can0 bitrate 250000 <other_timing_params> » I am working with equipments that use the NMEA2000 standard. So in the CAN stack, in addition to supporting CAN_RAW, I hope to implement a more or less complete support for CAN_NMEA2K. Jérémie De : Ярослав Машко <yaroslaw.mashko@gmail.com> Date : vendredi, 20 juin 2025 à 17:29 À : Jérémie JOURDIN <jeremie.jourdin@advens.fr> Cc : freebsd-hackers@FreeBSD.org <freebsd-hackers@freebsd.org> Objet : Re: FreeBSD-native CAN Stack and AF_CAN Protocol Family CAUTION: External Sender. This email originated from outside of ADVENS. Do not click on links or open attachments from senders you do not trust. Hello, What devices(the setup) do you have? I use FreeBSD regulary and always wanted to start programming some microcontrollers with it. Can i know your configuration. Have to start somewhere, maybe I can copy your config. BR Yaro пт, 20 июн. 2025 г., 15:52 Jérémie JOURDIN <jeremie.jourdin@advens.fr<mailto:jeremie.jourdin@advens.fr>>: Hello all, I am working on a system (15-current) that requires interaction with a CAN network. So far, I have developped a driver for my controller, able to send and receive CAN frames to and from connected devices. I’d like to implement a FreeBSD-native CAN network stack that is API-compatible with Linux’s Netlink CAN (netcan). This would allow us to recompile and use existing Linux userland tools with minimal changes. If you believe this development could benefit the community, I would be happy to submit a set of patches (driver + netcan support). We’re considering defining a new Protocol Family, AF_CAN, for this purpose. Would it be acceptable to use the first available « AF_VENDORXX » from sys/socket.h ? I would appreciate your thoughts, advice, and any recommendations you may have on this matter. -- Jérémie [-- Attachment #2 --] <html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">; <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Aptos; panose-1:2 11 0 4 2 2 2 2 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; font-size:12.0pt; font-family:"Aptos",sans-serif;} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} span.EmailStyle20 {mso-style-type:personal-reply; font-family:"Aptos",sans-serif; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt; mso-ligatures:none;} @page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 70.85pt 70.85pt;} div.WordSection1 {page:WordSection1;} --></style> </head> <body lang="FR" link="blue" vlink="purple" style="word-wrap:break-word"> <div class="WordSection1"> <p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">Hello,<o:p></o:p></span></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">My CAN controller reports itself as « AHC0512 ».<o:p></o:p></span></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">It is exposed via ACPI and is allocated with a classic bus_alloc_resource as SYS_RES_IOPORT.<br> <br> For now, bit timing parameters are hardcoded in my driver, and that’s precisely why I want to progress with adding support for socket CAN into the kernel.<br> This will make it possible to configure the CAN interface using « ifconfig can0 bitrate 250000 <other_timing_params> »<o:p></o:p></span></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">I am working with equipments that use the NMEA2000 standard. <br> So in the CAN stack, in addition to supporting CAN_RAW, I hope to implement a more or less complete support for CAN_NMEA2K.<o:p></o:p></span></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Jérémie<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p> <div id="mail-editor-reference-message-container"> <div> <div> <div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"> <p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">De : </span></b><span style="color:black">Ярослав Машко <yaroslaw.mashko@gmail.com><br> <b>Date : </b>vendredi, 20 juin 2025 à 17:29<br> <b>À : </b>Jérémie JOURDIN <jeremie.jourdin@advens.fr><br> <b>Cc : </b>freebsd-hackers@FreeBSD.org <freebsd-hackers@freebsd.org><br> <b>Objet : </b>Re: FreeBSD-native CAN Stack and AF_CAN Protocol Family<o:p></o:p></span></p> </div> <div style="border:solid maroon 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt"> <p class="MsoNormal" style="line-height:12.0pt;background:gold"><strong><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:red">CAUTION:</span></strong><strong><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> External Sender.</span></strong><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> This email originated from outside of ADVENS. Do not click on links or open attachments from senders you do not trust.<o:p></o:p></span></p> </div> <p class="MsoNormal"><o:p> </o:p></p> <div> <div> <div> <p class="MsoNormal">Hello,<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">What devices(the setup) do you have? I use FreeBSD regulary and always wanted to start programming some microcontrollers with it. Can i know your configuration. Have to start somewhere, maybe I can copy your config.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">BR<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <div> <div> <div> <div> <div> <div> <div> <div> <div> <div> <div> <div> <p class="MsoNormal">Yaro<o:p></o:p></p> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <p class="MsoNormal"><o:p> </o:p></p> <div> <div> <p class="MsoNormal">пт, 20 июн. 2025 г., 15:52 Jérémie JOURDIN <<a href="mailto:jeremie.jourdin@advens.fr">jeremie.jourdin@advens.fr</a>>:<o:p></o:p></p> </div> <blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm"> <div> <div> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">Hello all,</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">I am working on a system (15-current) that requires interaction with a CAN network.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">So far, I have developped a driver for my controller, able to send and receive CAN frames to and from connected devices.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">I’d like to implement a FreeBSD-native CAN network stack that is API-compatible with Linux’s Netlink CAN (netcan). </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">This would allow us to recompile and use existing Linux userland tools with minimal changes.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">If you believe this development could benefit the community, I would be happy to submit a set of patches (driver + netcan support).</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">We’re considering defining a new Protocol Family, AF_CAN, for this purpose.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">Would it be acceptable to use the first available « AF_VENDORXX » from sys/socket.h ?</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">I would appreciate your thoughts, advice, and any recommendations you may have on this matter.</span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New""> </span><o:p></o:p></p> <p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New"">-- Jérémie </span><o:p></o:p></p> </div> </div> </blockquote> </div> </div> </div> </div> </div> </div> </body> </html>
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