From: "Marek Behún" <kabel@kernel.org> To: Marc Zyngier <maz@kernel.org>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Bjorn Helgaas <helgaas@kernel.org> Cc: pali@kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Marek Behún" <kabel@kernel.org> Subject: [PATCH v2 16/23] PCI: aardvark: Add support for PME interrupts Date: Mon, 10 Jan 2022 02:50:11 +0100 [thread overview] Message-ID: <20220110015018.26359-17-kabel@kernel.org> (raw) In-Reply-To: <20220110015018.26359-1-kabel@kernel.org> From: Pali Rohár <pali@kernel.org> Currently enabling PCI_EXP_RTSTA_PME bit in PCI_EXP_RTCTL register does nothing. This is because PCIe PME driver expects to receive PCIe interrupt defined in PCI_EXP_FLAGS_IRQ register, but aardvark hardware does not trigger PCIe INTx/MSI interrupt for PME event, rather it triggers custom aardvark interrupt which this driver is not processing yet. Fix this issue by handling PME interrupt in advk_pcie_handle_int() and chaining it to PCIe interrupt 0 with generic_handle_domain_irq() (since aardvark sets PCI_EXP_FLAGS_IRQ to zero). With this change PCIe PME driver finally starts receiving PME interrupt. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Marek Behún <kabel@kernel.org> --- drivers/pci/controller/pci-aardvark.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index e7b9ca31c79c..3f2d570bfbb5 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1487,6 +1487,18 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) isr1_mask = advk_readl(pcie, PCIE_ISR1_MASK_REG); isr1_status = isr1_val & ((~isr1_mask) & PCIE_ISR1_ALL_MASK); + /* Process PME interrupt */ + if (isr0_status & PCIE_MSG_PM_PME_MASK) { + /* + * Do not clear PME interrupt bit in ISR0, it is cleared by IRQ + * receiver by writing to the PCI_EXP_RTSTA register of emulated + * root bridge. Aardvark HW returns zero for PCI_EXP_FLAGS_IRQ, + * so use PCIe interrupt 0. + */ + if (generic_handle_domain_irq(pcie->irq_domain, 0) == -EINVAL) + dev_err_ratelimited(&pcie->pdev->dev, "unhandled PME IRQ\n"); + } + /* Process ERR interrupt */ if (isr0_status & PCIE_ISR0_ERR_MASK) { advk_writel(pcie, PCIE_ISR0_ERR_MASK, PCIE_ISR0_REG); -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: "Marek Behún" <kabel@kernel.org> To: Marc Zyngier <maz@kernel.org>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Bjorn Helgaas <helgaas@kernel.org> Cc: pali@kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Marek Behún" <kabel@kernel.org> Subject: [PATCH v2 16/23] PCI: aardvark: Add support for PME interrupts Date: Mon, 10 Jan 2022 02:50:11 +0100 [thread overview] Message-ID: <20220110015018.26359-17-kabel@kernel.org> (raw) In-Reply-To: <20220110015018.26359-1-kabel@kernel.org> From: Pali Rohár <pali@kernel.org> Currently enabling PCI_EXP_RTSTA_PME bit in PCI_EXP_RTCTL register does nothing. This is because PCIe PME driver expects to receive PCIe interrupt defined in PCI_EXP_FLAGS_IRQ register, but aardvark hardware does not trigger PCIe INTx/MSI interrupt for PME event, rather it triggers custom aardvark interrupt which this driver is not processing yet. Fix this issue by handling PME interrupt in advk_pcie_handle_int() and chaining it to PCIe interrupt 0 with generic_handle_domain_irq() (since aardvark sets PCI_EXP_FLAGS_IRQ to zero). With this change PCIe PME driver finally starts receiving PME interrupt. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Marek Behún <kabel@kernel.org> --- drivers/pci/controller/pci-aardvark.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index e7b9ca31c79c..3f2d570bfbb5 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1487,6 +1487,18 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) isr1_mask = advk_readl(pcie, PCIE_ISR1_MASK_REG); isr1_status = isr1_val & ((~isr1_mask) & PCIE_ISR1_ALL_MASK); + /* Process PME interrupt */ + if (isr0_status & PCIE_MSG_PM_PME_MASK) { + /* + * Do not clear PME interrupt bit in ISR0, it is cleared by IRQ + * receiver by writing to the PCI_EXP_RTSTA register of emulated + * root bridge. Aardvark HW returns zero for PCI_EXP_FLAGS_IRQ, + * so use PCIe interrupt 0. + */ + if (generic_handle_domain_irq(pcie->irq_domain, 0) == -EINVAL) + dev_err_ratelimited(&pcie->pdev->dev, "unhandled PME IRQ\n"); + } + /* Process ERR interrupt */ if (isr0_status & PCIE_ISR0_ERR_MASK) { advk_writel(pcie, PCIE_ISR0_ERR_MASK, PCIE_ISR0_REG); -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-01-10 1:51 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-10 1:49 [PATCH v2 00/23] PCI: aardvark controller fixes BATCH 4 Marek Behún 2022-01-10 1:49 ` Marek Behún 2022-01-10 1:49 ` [PATCH v2 01/23] PCI: aardvark: Replace custom PCIE_CORE_INT_* macros with PCI_INTERRUPT_* Marek Behún 2022-01-10 1:49 ` Marek Behún 2022-01-10 17:07 ` Bjorn Helgaas 2022-01-10 17:07 ` Bjorn Helgaas 2022-01-10 1:49 ` [PATCH v2 02/23] PCI: aardvark: Fix reading MSI interrupt number Marek Behún 2022-01-10 1:49 ` Marek Behún 2022-02-04 17:24 ` Lorenzo Pieralisi 2022-02-04 17:24 ` Lorenzo Pieralisi 2022-02-05 10:53 ` Marc Zyngier 2022-02-05 10:53 ` Marc Zyngier 2022-01-10 1:49 ` [PATCH v2 03/23] PCI: aardvark: Fix support for MSI interrupts Marek Behún 2022-01-10 1:49 ` Marek Behún 2022-01-10 1:49 ` [PATCH v2 04/23] PCI: aardvark: Rewrite IRQ code to chained IRQ handler Marek Behún 2022-01-10 1:49 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 05/23] PCI: aardvark: Check return value of generic_handle_domain_irq() when processing INTx IRQ Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 06/23] PCI: aardvark: Make MSI irq_chip structures static driver structures Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 07/23] PCI: aardvark: Make msi_domain_info structure a static driver structure Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 08/23] PCI: aardvark: Use dev_fwnode() instead of of_node_to_fwnode(dev->of_node) Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 09/23] PCI: aardvark: Refactor unmasking summary MSI interrupt Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 10/23] PCI: aardvark: Add support for masking MSI interrupts Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 11/23] PCI: aardvark: Fix setting MSI address Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-02-17 17:14 ` Bjorn Helgaas 2022-02-17 17:14 ` Bjorn Helgaas 2022-02-18 14:43 ` Marek Behún 2022-02-18 14:43 ` Marek Behún 2022-02-23 18:13 ` Bjorn Helgaas 2022-02-23 18:13 ` Bjorn Helgaas 2022-02-24 12:59 ` Pali Rohár 2022-02-24 12:59 ` Pali Rohár 2022-02-24 19:43 ` Bjorn Helgaas 2022-02-24 19:43 ` Bjorn Helgaas 2022-01-10 1:50 ` [PATCH v2 12/23] PCI: aardvark: Enable MSI-X support Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 13/23] PCI: aardvark: Add support for ERR interrupt on emulated bridge Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 14/23] PCI: aardvark: Fix reading PCI_EXP_RTSTA_PME bit " Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 15/23] PCI: aardvark: Optimize writing PCI_EXP_RTCTL_PMEIE and PCI_EXP_RTSTA_PME " Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` Marek Behún [this message] 2022-01-10 1:50 ` [PATCH v2 16/23] PCI: aardvark: Add support for PME interrupts Marek Behún 2022-01-10 1:50 ` [PATCH v2 17/23] PCI: aardvark: Fix support for PME requester on emulated bridge Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 18/23] PCI: aardvark: Use separate INTA interrupt for emulated root bridge Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 19/23] PCI: aardvark: Remove irq_mask_ack callback for INTx interrupts Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 20/23] PCI: aardvark: Don't mask irq when mapping Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 21/23] PCI: aardvark: Drop __maybe_unused from advk_pcie_disable_phy() Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 22/23] PCI: aardvark: Update comment about link going down after link-up Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 1:50 ` [PATCH v2 23/23] PCI: aardvark: Make main irq_chip structure a static driver structure Marek Behún 2022-01-10 1:50 ` Marek Behún 2022-01-10 9:28 ` Marc Zyngier 2022-01-10 9:28 ` Marc Zyngier 2022-01-10 10:23 ` Marek Behún 2022-01-10 10:23 ` Marek Behún 2022-01-10 10:53 ` Pali Rohár 2022-01-10 10:53 ` Pali Rohár 2022-01-10 14:44 ` Marc Zyngier 2022-01-10 14:44 ` Marc Zyngier 2022-01-10 15:19 ` Marek Behún 2022-01-10 15:19 ` Marek Behún 2022-02-08 10:50 ` (subset) [PATCH v2 00/23] PCI: aardvark controller fixes BATCH 4 Lorenzo Pieralisi 2022-02-08 10:50 ` Lorenzo Pieralisi
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