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 7121D38FBE for ; Fri, 8 Dec 2023 17:24:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lDI3rt8+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B513AC433C8; Fri, 8 Dec 2023 17:24:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702056245; bh=bxL4oXwkTWZiQvUF7pKvci42A9qb4Z0RuhAIDxiS5uQ=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=lDI3rt8+FutXq45dszh2uDZ8ZDG8k8l1mWoZP41lyuU5sJy9rJz+jlHWaevRBdbFH ClLn1JWqjNFIrpHecB2Ap1ebI+KvXiew6KiiT3kAjS9oscI3kOIBeH5euxPL45KH4j JfC1GwV1lW1qs5amccFVWYklHVfWgfSTGnYUBOvljDpCvr5ZyyZK7ghjMJOMc6MmIx aplCXLbHytsLcM8k9suSoH+J2agPNfpISwFEvTCNKouxuHuaj82yY7ZZY/iKMbPf91 E7BKhIcAavkwdkkuN8cQga4z+lZoa6n+tojP+Y2U3vK3y57CbXdcFNk8sGPjDcBB5B LR0hL3PwuijEQ== Date: Fri, 8 Dec 2023 11:24:04 -0600 From: Bjorn Helgaas To: Nikita Proshkin Cc: linux-pci@vger.kernel.org, Martin Mares , linux@yadro.com, Sergei Miroshnichenko Subject: Re: [PATCH 15/15] pciutils-pcilmr: Add pcilmr man page Message-ID: <20231208172404.GA797244@bhelgaas> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231208091734.12225-16-n.proshkin@yadro.com> I'm not a hardware person, but this looks like interesting work! On Fri, Dec 08, 2023 at 12:17:34PM +0300, Nikita Proshkin wrote: > +Turn off PCIE Leaky Bucket Feature, Re-Equalization and Link Degradation; s/PCIE/PCIe/ to match other uses here. > +The current Link data rate must be 16.0 GT/s or higher (right now > +utility supports Gen 4 and 5 Links); So far, each major PCIe spec revision has added a single new data rate, but that may not always be true, and the spec always uses terminology like "16.0 GT/s or higher" instead of terms like "Gen 4". So "supports 16.0 GT/s and 32.0 GT/s Links" might be clearer. > +The Gen 5 Specification sets allowed range for Timing Margin from 20%\~UI to 50%\~UI and Usage in the spec itself would be more like "PCIe Base Spec Revision 5.0" since it doesn't use "Gen 5". > +According to spec it's possible for Receiver to margin up to MaxLanes + 1 > +lanes simultaneously, but usually this works bad, so this option is for s/works bad/works poorly/ > +experiments mostly.