From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 3DA803158E for ; Mon, 16 Oct 2023 17:16:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="NHse2qeS" Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D11AEA for ; Mon, 16 Oct 2023 10:16:47 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id d9443c01a7336-1c9d407bb15so39969125ad.0 for ; Mon, 16 Oct 2023 10:16:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1697476607; x=1698081407; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=oOnkKW9E33HHzsaH2XgU+G+2xfhOZYjGYZoXUL8UE40=; b=NHse2qeSscYLnKCIUo3VpbyNi3s7KSQ1S8wxpCHq/Z2uQR/TaSeepBWB7j5seoGVEU YwJiWfq/FRUaiLJugaefFL+kOhJQgZL1l23Nxcp7OIjy1h9F4NT/bS+w1DSOIMOOLlqL yV58njO7nP5Ng1kHOaZgSu713puXjDNtug9gOB5QlTkEYBKuGYGWW1z7H2VMe9SQpj7N k2HAGJqEgrlXHM72GbCcfodl0L/+BVdfj+zwIT7EbT+IuFxQvtlYaEWAZgjS6BPcyS2V 59tKaORNt0esW1vYBOXFToJ1P09lN4axQLUkNy/cRAqC427G9pb3OqAFWf0x1R7bYkxp wbsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697476607; x=1698081407; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=oOnkKW9E33HHzsaH2XgU+G+2xfhOZYjGYZoXUL8UE40=; b=nuC37+70UO5DgRaWGy2/dl6fHLZsPYczov3Fq8WcFephjp07G5S/g9jqQ8MGIA5US0 TPjrVoBT3RdGGfCehLX0Qy3GFOBrp6/+Wqu3VYn2HXjPzSb47uFxakNj1lindcReWHA2 0AnI3qpMcVFed1A+z2tpBMKfZiVNLD/gJkoLgCeIGxz6RYduN6l3n1xW0PK/mDyNxesM fkmpIB99B9D2ymygFPrURbkTX6X4GlQs34JnsW9DCdsz+VLL9hKWCFZ33IpzGbhsFDG/ L/XyXkA+5yPn72EVF1KnnbO+5f9+GttWxIfuGJf0po8ZeYJEfBxb5enxxQc/A1zCOxqr TKeg== X-Gm-Message-State: AOJu0Yzur+jFKHMo/yzhNH1Qm7FZG16f+VB0b8uBxutDlnBFbeaCHsgb unnUtvlGtS5PAN1iEavoLiGg X-Google-Smtp-Source: AGHT+IFho1tjm5iK0/PdZpwOJVLlzh60B+Z1CzCZJ5QivVrZEGbF5FhDL6PPek4KbSf6TWQbtLGYZw== X-Received: by 2002:a17:903:22c9:b0:1ca:8b74:17ff with SMTP id y9-20020a17090322c900b001ca8b7417ffmr1919597plg.26.1697476606907; Mon, 16 Oct 2023 10:16:46 -0700 (PDT) Received: from thinkpad ([117.207.31.199]) by smtp.gmail.com with ESMTPSA id c15-20020a170903234f00b001c62b9a51c0sm8698818plh.103.2023.10.16.10.16.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Oct 2023 10:16:46 -0700 (PDT) Date: Mon, 16 Oct 2023 22:46:37 +0530 From: Manivannan Sadhasivam To: Frank Li Cc: aisheng.dong@nxp.com, bhelgaas@google.com, devicetree@vger.kernel.org, festevam@gmail.com, imx@lists.linux.dev, jdmason@kudzu.us, kernel@pengutronix.de, kishon@kernel.org, kw@linux.com, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lorenzo.pieralisi@arm.com, lpieralisi@kernel.org, maz@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org, tglx@linutronix.de Subject: Re: [PATCH v2 0/5] Add RC-to-EP doorbell with platform MSI controller Message-ID: <20231016171637.GJ39962@thinkpad> References: <20230911220920.1817033-1-Frank.Li@nxp.com> <20230930090249.GB3564@thinkpad> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Spam-Status: No, score=0.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On Mon, Oct 16, 2023 at 10:50:58AM -0400, Frank Li wrote: > On Tue, Oct 10, 2023 at 10:21:24AM -0400, Frank Li wrote: > > On Sat, Sep 30, 2023 at 11:02:49AM +0200, Manivannan Sadhasivam wrote: > > > On Wed, Sep 20, 2023 at 05:39:48PM -0400, Frank Li wrote: > > > > On Mon, Sep 11, 2023 at 06:09:15PM -0400, Frank Li wrote: > > > > > ┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐ > > > > > │ │ │ │ │ │ > > > > > │ │ │ PCI Endpoint │ │ PCI Host │ > > > > > │ │ │ │ │ │ > > > > > │ │◄──┤ 1.platform_msi_domain_alloc_irqs()│ │ │ > > > > > │ │ │ │ │ │ > > > > > │ MSI ├──►│ 2.write_msi_msg() ├──►├─BAR │ > > > > > │ Controller │ │ update doorbell register address│ │ │ > > > > > │ │ │ for BAR │ │ │ > > > > > │ │ │ │ │ 3. Write BAR│ > > > > > │ │◄──┼───────────────────────────────────┼───┤ │ > > > > > │ │ │ │ │ │ > > > > > │ ├──►│ 4.Irq Handle │ │ │ > > > > > │ │ │ │ │ │ > > > > > │ │ │ │ │ │ > > > > > └────────────┘ └───────────────────────────────────┘ └────────────────┘ > > > > > > > > @mani: > > > > Do you have chance to review this patch again? > > > > > > I was on vacation for past few weeks. Will take a look in the coming week. > > > > Ping? > > > > Frank > > @mani: did you have chance to look at this? > Sorry for the long delay. I will take a look tomorrow. - Mani > > > > > > > > - Mani > > > > > > > > > > > Frank > > > > > > > > > > > > > > This patches based on old https://lore.kernel.org/imx/20221124055036.1630573-1-Frank.Li@nxp.com/ > > > > > > > > > > Original patch only target to vntb driver. But actually it is common > > > > > method. > > > > > > > > > > This patches add new API to pci-epf-core, so any EP driver can use it. > > > > > > > > > > The key point is comments from Thomas Gleixner, who suggest use new > > > > > PCI/IMS. But arm platform change still not be merged yet. > > > > > > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git devmsi-v2-arm > > > > > > > > > > So I still use existed method implement RC to EP doorbell. > > > > > > > > > > If Thomas Gleixner want to continue work on devmsi-v2-arm, I can help test > > > > > and update this patch. > > > > > > > > > > Change from v1 to v2 > > > > > - Add missed patch for endpont/pci-epf-test.c > > > > > - Move alloc and free to epc driver from epf. > > > > > - Provide general help function for EPC driver to alloc platform msi irq. > > > > > - Fixed manivannan's comments. > > > > > > > > > > Frank Li (5): > > > > > PCI: endpoint: Add RC-to-EP doorbell support using platform MSI > > > > > controller > > > > > PCI: dwc: add doorbell support by use MSI controller > > > > > PCI: endpoint: pci-epf-test: add doorbell test > > > > > misc: pci_endpoint_test: Add doorbell test case > > > > > tools: PCI: Add 'B' option for test doorbell > > > > > > > > > > drivers/misc/pci_endpoint_test.c | 48 +++++ > > > > > .../pci/controller/dwc/pcie-designware-ep.c | 2 + > > > > > drivers/pci/endpoint/functions/pci-epf-test.c | 59 +++++- > > > > > drivers/pci/endpoint/pci-epc-core.c | 192 ++++++++++++++++++ > > > > > drivers/pci/endpoint/pci-epf-core.c | 44 ++++ > > > > > include/linux/pci-epc.h | 6 + > > > > > include/linux/pci-epf.h | 7 + > > > > > include/uapi/linux/pcitest.h | 1 + > > > > > tools/pci/pcitest.c | 16 +- > > > > > 9 files changed, 373 insertions(+), 2 deletions(-) > > > > > > > > > > -- > > > > > 2.34.1 > > > > > > > > > > > -- > > > மணிவண்ணன் சதாசிவம் -- மணிவண்ணன் சதாசிவம்