From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEC7F2DC79F for ; Thu, 11 Sep 2025 19:02:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757617378; cv=none; b=O8XubKbnftVOuV12gAPxtWqeW0rAKsAJf43mxzV+mZrNwT/QrZMpPp+Dl53sxGC7AcKDc7hjhecXeH9Pp/clYQuCwDKR0cCYTht/Kqd08BuiHw3R8eHG4HyIQpE9HWm67bnaIundjqr1kGmLFQE6D0XtubI6bxU5JB0lJOti8hY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757617378; c=relaxed/simple; bh=/l1FNyVz0XVh27TNNvS7g18wDcuOqzJQhTqiTmOYUh8=; h=MIME-Version:Date:From:To:Cc:Message-Id:In-Reply-To:References: Subject:Content-Type; b=GW/GXahiBRacExcJaRlU4XcfxMCPH/w0RQlny8hMq+yKfWPySjYV3Oyegwh7KBX74dqAkbRRXv+ge1MIWlyqPFSOeIPTgYWkVbjZVmd679pKA+xcKmLVbeK8FBEFC+foXb6bN0lNp5FYEhIVKHtmI2m02342Pt0X8LsJocHxpOM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Qpc9RCfl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Qpc9RCfl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 387ECC4CEF8 for ; Thu, 11 Sep 2025 19:02:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757617378; bh=/l1FNyVz0XVh27TNNvS7g18wDcuOqzJQhTqiTmOYUh8=; h=Date:From:To:Cc:In-Reply-To:References:Subject:From; b=Qpc9RCflNruABHAWoaS2aAF0THFSa5hSdMLcv0fguWIR4kSjWpKyv9ZbY3UKPknjj Le9j3cMyPdp6Ake+/8KGDxw/FwDaJ0ZwiTCJ+2MgJLea824nnnbqrGOseU0aNv/7Ol g0abT32k3DE1WWC7wsOwxaki6Ebk6KQ4RYcB0zPNLAu63STefUZjs4KfnCIuNwV0m2 SVktb2H36Rzww45yZAK/kfjQdMkI6bcj4RmeBBGRtMRsVKzu+6JTXAoDPurg3C+fes lqwK7mp37HxiqcpOKCzxoWNJhM4NtBHjAg6v5b3CzIIN15mq4jPuGrxC3z9QwhdugH MWjwetc2w8oKg== Received: from phl-compute-12.internal (phl-compute-12.internal [10.202.2.52]) by mailfauth.phl.internal (Postfix) with ESMTP id 3C3ECF40069; Thu, 11 Sep 2025 15:02:57 -0400 (EDT) Received: from phl-imap-08 ([10.202.2.84]) by phl-compute-12.internal (MEProxy); Thu, 11 Sep 2025 15:02:57 -0400 X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdeggddvieeliecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpuffrtefokffrpgfnqfghnecuuegr ihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjug hrpefoggffhffvvefkjghfufgtgfesthejredtredttdenucfhrhhomhepfdfnvghonhcu tfhomhgrnhhovhhskhihfdcuoehlvghonheskhgvrhhnvghlrdhorhhgqeenucggtffrrg htthgvrhhnpeejvefflefgledvgfevvdetleehhfdvffehgeffkeevleeiveefjeetieel ueeuvdenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpe hlvghonhdomhgvshhmthhprghuthhhphgvrhhsohhnrghlihhthidquddvfedtheefleek gedqvdejjeeljeejvdekqdhlvghonheppehkvghrnhgvlhdrohhrgheslhgvohhnrdhnuh dpnhgspghrtghpthhtohepgedpmhhouggvpehsmhhtphhouhhtpdhrtghpthhtohepshhi nhihuhhksehgmhgrihhlrdgtohhmpdhrtghpthhtohepkhhonhhsthgrnhhtihhnrdhsih hnhihukhesihhnthgvlhdrtghomhdprhgtphhtthhopehlihhnuhhsrdifrghllhgvihhj sehlihhnrghrohdrohhrghdprhgtphhtthhopehkshhumhhmihhtsehlihhsthhsrdhlih hnuhigrdguvghv X-ME-Proxy: Feedback-ID: i927946fb:Fastmail Received: by mailuser.phl.internal (Postfix, from userid 501) id 09B082CE0072; Thu, 11 Sep 2025 15:02:57 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: ksummit@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: AiuzKEH_WMOk Date: Thu, 11 Sep 2025 22:02:35 +0300 From: "Leon Romanovsky" To: "Kostia Sinyuk" , "linus.walleij@linaro.org" Cc: ksummit@lists.linux.dev, "Konstantin Sinyuk" Message-Id: <164760a7-edc9-4be7-b7ca-1729feec6da6@app.fastmail.com> In-Reply-To: References: Subject: Re: [TECH TOPIC] UALink driver upstreaming Content-Type: text/plain Content-Transfer-Encoding: 7bit On Thu, Sep 11, 2025, at 21:10, Konstantin Sinyuk wrote: > On Thu, Sep 11, 2025 at 10:42:01AM +0200, Linus Walleij wrote: >> So this gives at hand that since this is no "ordinary" memory-mapped >> driver, it needs its own bus and therefore intuitively its own subsystem? >> >> What about drivers/accel/ual where other accelerators live? >> >> Or if that is somehow inappropriate, just drivers/ual, don't be shy. > > Hi Linus, > > For the initial RFC, I thought to start under drivers/misc/ just as a > lightweight entry point to get early review. But I agree with you that > UALink fits more naturally as its own subsystem, similar to how CXL is > handled, rather than being grouped under accel. The long-term plan > should definitely be drivers/ual/. So do it right from the beginning and save from us unnecessary review iterations. Thanks > > Best Regards, > Konstantin