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Fri, 17 May 2019 12:39:29 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Fri, 17 May 2019 12:39:29 +0000 Received: from vidyas-desktop.nvidia.com (Not Verified[10.24.37.38]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Fri, 17 May 2019 05:39:29 -0700 From: Vidya Sagar To: , , , , , , , , , , Subject: [PATCH V7 02/15] PCI: Disable MSI for Tegra194 root port Date: Fri, 17 May 2019 18:08:33 +0530 Message-ID: <20190517123846.3708-3-vidyas@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190517123846.3708-1-vidyas@nvidia.com> References: <20190517123846.3708-1-vidyas@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1558096728; bh=HSVuj7isNNLisx5nM09rg6tTu0ozPxsXBWfH15LevhU=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=qj/2P0IY9G8DF5KjvSznVd9FT16mrDjVXV0xfi1/7AqJWk4srJu8APDjKeHT3v2kr ISuTzQD8xVe+2gPcABPsZw2y3OE9xe+XQ+JVn57E81k4homBCm7TsIN3ZPljRT454F /J/0VyvZ6Mo/k7SW4vMrTjH5ZRq64JdK7ai6ebnX6Ugr3tqovLUe+i2uM9+diVjjCF 0utAnriSb0poPoBtGIH5lS76uXhFCG2zb8Tci5H30r6gmHSGM4gxGnZSLdZwxKFzY3 5vwgh35nwqUGbHfDJ2RboEi+QBponQxGTDbZ72POiqPzC52K4EwJMxatpH1hcCySu9 cNY71x5qipEOQ== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190517_053930_898203_A5046605 X-CRM114-Status: UNSURE ( 7.84 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, mmaddireddy@nvidia.com, kthota@nvidia.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, mperttunen@nvidia.com, linux-tegra@vger.kernel.org, vidyas@nvidia.com, linux-arm-kernel@lists.infradead.org, sagar.tv@gmail.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Tegra194 rootports don't generate MSI interrupts for PME events and hence MSI needs to be disabled for them to avoid root ports service drivers registering their respective ISRs with MSI interrupt. Signed-off-by: Vidya Sagar --- Changes since [v6]: * This is a new patch drivers/pci/quirks.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 0f16acc323c6..28f9a0380df5 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2592,6 +2592,20 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_15, nvenet_msi_disable); +/* + * Tegra194's PCIe root ports don't generate MSI interrupts for PME events + * instead legacy interrupts are generated. Hence, to avoid service drivers + * registering their respective ISRs for MSIs, need to disable MSI interrupts + * for root ports. + */ +static void disable_tegra194_rp_msi(struct pci_dev *dev) +{ + dev->no_msi = 1; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad0, disable_tegra194_rp_msi); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad1, disable_tegra194_rp_msi); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad2, disable_tegra194_rp_msi); + /* * Some versions of the MCP55 bridge from Nvidia have a legacy IRQ routing * config register. This register controls the routing of legacy -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel