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[2603:6081:7b00:6400:1500:2834:9def:41f1]) by smtp.gmail.com with ESMTPSA id 19-20020a810d13000000b00545a081849csm552082ywn.44.2023.03.31.07.16.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 Mar 2023 07:16:42 -0700 (PDT) Date: Fri, 31 Mar 2023 10:16:41 -0400 From: Tom Rini To: stcarlso@linux.microsoft.com Cc: u-boot@lists.denx.de Subject: Re: [PATCH v2 1/3] cmd: pci: Add command to set MPS of all PCIe devices Message-ID: <20230331141641.GQ13222@bill-the-cat> References: <20230310190715.155025-1-stcarlso@linux.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="AWUa5b5eGFBYA39C" Content-Disposition: inline In-Reply-To: <20230310190715.155025-1-stcarlso@linux.microsoft.com> X-Clacks-Overhead: GNU Terry Pratchett X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean --AWUa5b5eGFBYA39C Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Mar 10, 2023 at 11:07:13AM -0800, stcarlso@linux.microsoft.com wrot= e: > From: Stephen Carlson >=20 > Enable tuning of the PCI Express MPS (Maximum Payload Size) of > each device. The Maximum Read Request Size is not altered. >=20 > The SAFE method uses the largest MPS value supported by all devices in the > system for each device. This method is the same algorithm as used by Linux > pci=3Dpcie_bus_safe. >=20 > The PEER2PEER method sets all devices to the minimal (128 byte) MPS, which > allows hot plug of devices later that might only support the minimum size, > and ensures compatibility of DMA between two devices on the bus. >=20 > Signed-off-by: Stephen Carlson Applied to u-boot/next, thanks! --=20 Tom --AWUa5b5eGFBYA39C Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGzBAABCgAdFiEEGjx/cOCPqxcHgJu/FHw5/5Y0tywFAmQm60kACgkQFHw5/5Y0 tyzq5Av/VRlTfPkp3Q5CmKnuDIPmJNYlZ4FxoHsuRoEdEnjGAZk3dQoW1X3bEnZT 3sjNIcXq4Dy/azPF30XsmwJMSrgpXFK/MFVQixoaujp60NgRr1oOV7uGdTwxX/fA rGbitHPeQyDYLmYMlB503mo5WlEJmzAf7sc+SWUpHrjBDv6jrDttGV9oO1ZTEwSq 4eKBIicdXUEHLUzaV5P6wH0rwF0OewaKAPFbT9Fkzd304aPegY4AuosOvAVp8myT 0ci+fuNzNNORb3GKLgEbErK0EhftFssfeXNuhylUtORqWAfTZaF7wpDOfqaVQ1Lw eKpch/TlvQ3RveCe1ANMv4k3oomh3VCKghuzpXEm4hAcIVv/LtcyOIoBd/bIKcYD ZWan+om0MIWW7+3+yrrDwFeIfGkmvxnfPOsOUfjEsFg3320w0ixBzo0qkgG8hxqf AOpPoHHhbO4UKq16sz4E+799C7HPeFwPZAAEPPNxQwLfjte2XnQyR5FHj3DqFc8a y832ajcU =ch2o -----END PGP SIGNATURE----- --AWUa5b5eGFBYA39C--