From: "Pali Rohár" <pali@kernel.org> To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Bjorn Helgaas <bhelgaas@google.com>, Rob Herring <robh@kernel.org> Cc: "Krzysztof Wilczyński" <kw@linux.com>, "Marek Behún" <kabel@kernel.org>, "Marc Zyngier" <maz@kernel.org>, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/3] PCI: aardvark: Enable MSI-X support Date: Mon, 23 Aug 2021 18:40:33 +0200 [thread overview] Message-ID: <20210823164033.27491-4-pali@kernel.org> (raw) In-Reply-To: <20210823164033.27491-1-pali@kernel.org> According to PCI 3.0 specification, sending both MSI and MSI-X interrupts is done by DWORD memory write operation to doorbell message address. The write operation for MSI has zero upper 16 bits and the MSI interrupt number in the lower 16 bits. The write operation for MSI-X contains a 32-bit value from MSI-X table. As driver supports and assigns only interrupt numbers from range 0..31, enable also MSI-X support. Testing proved that kernel can correctly receive MSI-X interrupts from PCIe cards which supports both MSI and MSI-X interrupts. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Marek Behún <kabel@kernel.org> Cc: stable@vger.kernel.org --- drivers/pci/controller/pci-aardvark.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 0e81d7f37465..2c944a04fba8 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1200,7 +1200,7 @@ static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie) msi_di = &pcie->msi_domain_info; msi_di->flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | - MSI_FLAG_MULTI_PCI_MSI; + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX; msi_di->chip = msi_ic; pcie->msi_inner_domain = -- 2.20.1
prev parent reply other threads:[~2021-08-23 16:41 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-15 10:36 [PATCH 0/3] PCI: aardvark: MSI interrupt fixes Pali Rohár 2021-08-15 10:36 ` [PATCH 1/3] PCI: aardvark: Fix reading MSI interrupt number Pali Rohár 2021-08-15 10:36 ` [PATCH 2/3] PCI: aardvark: Fix masking MSI interrupts Pali Rohár 2021-08-15 16:56 ` Marc Zyngier 2021-08-15 17:36 ` Pali Rohár 2021-08-15 21:55 ` Marc Zyngier 2021-08-15 23:10 ` Pali Rohár 2021-08-15 10:36 ` [PATCH 3/3] PCI: aardvark: Enable MSI-X support Pali Rohár 2021-08-23 16:40 ` [PATCH v2 0/3] PCI: aardvark: MSI interrupt fixes Pali Rohár 2021-08-23 16:40 ` [PATCH v2 1/3] PCI: aardvark: Fix reading MSI interrupt number Pali Rohár 2021-08-23 16:52 ` Marc Zyngier 2021-08-23 16:40 ` [PATCH v2 2/3] PCI: aardvark: Fix masking MSI interrupts Pali Rohár 2021-08-23 16:40 ` Pali Rohár [this message]
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20210823164033.27491-4-pali@kernel.org \ --to=pali@kernel.org \ --cc=bhelgaas@google.com \ --cc=kabel@kernel.org \ --cc=kw@linux.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-pci@vger.kernel.org \ --cc=lorenzo.pieralisi@arm.com \ --cc=maz@kernel.org \ --cc=robh@kernel.org \ --cc=thomas.petazzoni@bootlin.com \ --subject='Re: [PATCH v2 3/3] PCI: aardvark: Enable MSI-X support' \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).