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 404941E530; Fri, 20 Oct 2023 17:53:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RHKQ7jq0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B226C433C7; Fri, 20 Oct 2023 17:53:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1697824394; bh=zlzQselxabvwga7pwZwHtszfK36j7B5oGEvcCuWmbvY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RHKQ7jq0nGa0C6zbqjUOHa0dgGM93U7No/q0uLVyxXdsToA92e0+5J7zl5YFNPndl 3FHz6T/d0VP+IDUuyQNdbMAepCYvj3SQ3DHB0zoaDOUAqctOaNjBmt7v5BeDAGRJna 2HxeQvLLVxgMcEIYWQxPFPDVB/Wx3nMb0wr2PaYwqlRV8LmUbsL5m3MDSLTTSggQ4L dqDrBakqHLCuQKMjR7aFjrJpw5WDLd6dq5aTQ8jIokqjRG77XG9480mT7XUwjq4CWu hsxNg4gusLSE8+2hen7cK1BW2YpynmKq7fgH0inNu1r5oL+VVc4a/eKNAdBLDF5lko UtF7Hp+TpZbPQ== Date: Fri, 20 Oct 2023 23:23:04 +0530 From: Manivannan Sadhasivam To: Frank Li Cc: manivannan.sadhasivam@linaro.org, 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 4/5] misc: pci_endpoint_test: Add doorbell test case Message-ID: <20231020175304.GC46191@thinkpad> References: <20230911220920.1817033-1-Frank.Li@nxp.com> <20230911220920.1817033-5-Frank.Li@nxp.com> Precedence: bulk X-Mailing-List: imx@lists.linux.dev 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: <20230911220920.1817033-5-Frank.Li@nxp.com> On Mon, Sep 11, 2023 at 06:09:19PM -0400, Frank Li wrote: > Using bit 0..7 of magic as version number in pci_endpoint_test struct to > support older driver versions. Save to 'version' field of struct > pci_endpoint_test to prevent reading non-existent address. > Since both drivers are in the kernel, I don't see a necessity to maintain compatibility. Does it make sense to load drivers of previous kernel revision with a new kernel? > Add three registers: PCIE_ENDPOINT_TEST_DB_BAR, PCIE_ENDPOINT_TEST_DB_ADDR, > PCIE_ENDPOINT_TEST_DB_DATA. > This patch is not adding these registers and not this driver also. So this statement is wrong. > Write data from PCI_ENDPOINT_TEST_DB_DATA to address from > PCI_ENDPOINT_TEST_DB_ADDR to trigger doorbell and wait for endpoint > feedback. > You can reuse a part of the commit description I suggested for previous patch. Rest looks good to me. - Mani > Signed-off-by: Frank Li > --- > drivers/misc/pci_endpoint_test.c | 48 ++++++++++++++++++++++++++++++++ > include/uapi/linux/pcitest.h | 1 + > 2 files changed, 49 insertions(+) > > diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c > index ed4d0ef5e5c31..ed0b025132d17 100644 > --- a/drivers/misc/pci_endpoint_test.c > +++ b/drivers/misc/pci_endpoint_test.c > @@ -33,6 +33,8 @@ > #define IRQ_TYPE_MSIX 2 > > #define PCI_ENDPOINT_TEST_MAGIC 0x0 > +#define PCI_MAGIC_VERSION_MASK GENMASK(7, 0) > +#define PCI_ENDPOINT_TEST_V1 0x1 > > #define PCI_ENDPOINT_TEST_COMMAND 0x4 > #define COMMAND_RAISE_LEGACY_IRQ BIT(0) > @@ -52,6 +54,7 @@ > #define STATUS_IRQ_RAISED BIT(6) > #define STATUS_SRC_ADDR_INVALID BIT(7) > #define STATUS_DST_ADDR_INVALID BIT(8) > +#define STATUS_DOORBELL_SUCCESS BIT(9) > > #define PCI_ENDPOINT_TEST_LOWER_SRC_ADDR 0x0c > #define PCI_ENDPOINT_TEST_UPPER_SRC_ADDR 0x10 > @@ -66,7 +69,12 @@ > #define PCI_ENDPOINT_TEST_IRQ_NUMBER 0x28 > > #define PCI_ENDPOINT_TEST_FLAGS 0x2c > +#define PCI_ENDPOINT_TEST_DB_BAR 0x30 > +#define PCI_ENDPOINT_TEST_DB_ADDR 0x34 > +#define PCI_ENDPOINT_TEST_DB_DATA 0x38 > + > #define FLAG_USE_DMA BIT(0) > +#define FLAG_SUPPORT_DOORBELL BIT(1) > > #define PCI_DEVICE_ID_TI_AM654 0xb00c > #define PCI_DEVICE_ID_TI_J7200 0xb00f > @@ -102,6 +110,7 @@ enum pci_barno { > BAR_3, > BAR_4, > BAR_5, > + NO_BAR = -1, > }; > > struct pci_endpoint_test { > @@ -118,6 +127,7 @@ struct pci_endpoint_test { > enum pci_barno test_reg_bar; > size_t alignment; > const char *name; > + u8 version; > }; > > struct pci_endpoint_test_data { > @@ -713,6 +723,38 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test, > return false; > } > > +static bool pci_endpoint_test_doorbell(struct pci_endpoint_test *test) > +{ > + enum pci_barno bar; > + u32 data, status; > + u32 addr; > + > + if (test->version < PCI_ENDPOINT_TEST_V1) > + return false; > + > + bar = pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_DB_BAR); > + if (bar == NO_BAR) > + return false; > + > + data = pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_DB_DATA); > + addr = pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_DB_ADDR); > + bar = pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_DB_BAR); > + > + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type); > + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1); > + > + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_STATUS, 0); > + pci_endpoint_test_bar_writel(test, bar, addr, data); > + > + wait_for_completion_timeout(&test->irq_raised, msecs_to_jiffies(1000)); > + > + status = pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_STATUS); > + if (status & STATUS_DOORBELL_SUCCESS) > + return true; > + > + return false; > +} > + > static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd, > unsigned long arg) > { > @@ -760,6 +802,9 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd, > case PCITEST_CLEAR_IRQ: > ret = pci_endpoint_test_clear_irq(test); > break; > + case PCITEST_DOORBELL: > + ret = pci_endpoint_test_doorbell(test); > + break; > } > > ret: > @@ -887,6 +932,9 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, > misc_device->parent = &pdev->dev; > misc_device->fops = &pci_endpoint_test_fops; > > + test->version = FIELD_GET(PCI_MAGIC_VERSION_MASK, > + pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_MAGIC)); > + > err = misc_register(misc_device); > if (err) { > dev_err(dev, "Failed to register device\n"); > diff --git a/include/uapi/linux/pcitest.h b/include/uapi/linux/pcitest.h > index f9c1af8d141b4..479ca1aa3ae0b 100644 > --- a/include/uapi/linux/pcitest.h > +++ b/include/uapi/linux/pcitest.h > @@ -20,6 +20,7 @@ > #define PCITEST_SET_IRQTYPE _IOW('P', 0x8, int) > #define PCITEST_GET_IRQTYPE _IO('P', 0x9) > #define PCITEST_CLEAR_IRQ _IO('P', 0x10) > +#define PCITEST_DOORBELL _IO('P', 0x11) > > #define PCITEST_FLAGS_USE_DMA 0x00000001 > > -- > 2.34.1 > -- மணிவண்ணன் சதாசிவம் From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1A7C8C001DF for ; Fri, 20 Oct 2023 17:53:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/2pkYfRlFsHLFZ5AYyei9DuElxjBjblpYKubqL1gZdY=; b=eNQKXoBMBRUFSJ 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Oct 2023 17:53:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1697824394; bh=zlzQselxabvwga7pwZwHtszfK36j7B5oGEvcCuWmbvY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RHKQ7jq0nGa0C6zbqjUOHa0dgGM93U7No/q0uLVyxXdsToA92e0+5J7zl5YFNPndl 3FHz6T/d0VP+IDUuyQNdbMAepCYvj3SQ3DHB0zoaDOUAqctOaNjBmt7v5BeDAGRJna 2HxeQvLLVxgMcEIYWQxPFPDVB/Wx3nMb0wr2PaYwqlRV8LmUbsL5m3MDSLTTSggQ4L dqDrBakqHLCuQKMjR7aFjrJpw5WDLd6dq5aTQ8jIokqjRG77XG9480mT7XUwjq4CWu hsxNg4gusLSE8+2hen7cK1BW2YpynmKq7fgH0inNu1r5oL+VVc4a/eKNAdBLDF5lko UtF7Hp+TpZbPQ== Date: Fri, 20 Oct 2023 23:23:04 +0530 From: Manivannan Sadhasivam To: Frank Li Cc: manivannan.sadhasivam@linaro.org, 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 4/5] misc: pci_endpoint_test: Add doorbell test case Message-ID: <20231020175304.GC46191@thinkpad> References: <20230911220920.1817033-1-Frank.Li@nxp.com> <20230911220920.1817033-5-Frank.Li@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230911220920.1817033-5-Frank.Li@nxp.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231020_105321_979988_49CD5175 X-CRM114-Status: GOOD ( 25.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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