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64b3d5a061
Manually rebased: target/linux/generic/hack-5.15/953-net-patch-linux-kernel-to-support-shortcut-fe.patch All other patches automatically rebased. Build system: x86_64 Fixes: #10071 Signed-off-by: Linhui Liu <liulinhui36@gmail.com>
51 lines
1.9 KiB
Diff
51 lines
1.9 KiB
Diff
From 7acd8ef92e8789e10b5d736d73cea3b625087f26 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
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Date: Wed, 8 Dec 2021 06:07:44 +0100
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Subject: [PATCH] PCI: aardvark: Add support for PME interrupts
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Currently enabling PCI_EXP_RTSTA_PME bit in PCI_EXP_RTCTL register does
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nothing. This is because PCIe PME driver expects to receive PCIe interrupt
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defined in PCI_EXP_FLAGS_IRQ register, but aardvark hardware does not
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trigger PCIe INTx/MSI interrupt for PME event, rather it triggers custom
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aardvark interrupt which this driver is not processing yet.
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Fix this issue by handling PME interrupt in advk_pcie_handle_int() and
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chaining it to PCIe interrupt 0 with generic_handle_domain_irq() (since
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aardvark sets PCI_EXP_FLAGS_IRQ to zero). With this change PCIe PME driver
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finally starts receiving PME interrupt.
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Signed-off-by: Pali Rohár <pali@kernel.org>
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Signed-off-by: Marek Behún <kabel@kernel.org>
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---
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drivers/pci/controller/pci-aardvark.c | 13 +++++++++++++
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1 file changed, 13 insertions(+)
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--- a/drivers/pci/controller/pci-aardvark.c
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+++ b/drivers/pci/controller/pci-aardvark.c
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@@ -1568,6 +1568,22 @@ static void advk_pcie_handle_int(struct
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dev_err_ratelimited(&pcie->pdev->dev, "unhandled ERR IRQ\n");
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}
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+ /* Process PME interrupt as the first one to do not miss PME requester id */
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+ if (isr0_status & PCIE_MSG_PM_PME_MASK)
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+ advk_pcie_handle_pme(pcie);
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+
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+ /* Process ERR interrupt */
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+ if (isr0_status & PCIE_ISR0_ERR_MASK) {
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+ advk_writel(pcie, PCIE_ISR0_ERR_MASK, PCIE_ISR0_REG);
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+
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+ /*
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+ * Aardvark HW returns zero for PCI_ERR_ROOT_AER_IRQ, so use
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+ * PCIe interrupt 0
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+ */
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+ if (generic_handle_domain_irq(pcie->rp_irq_domain, 0) == -EINVAL)
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+ dev_err_ratelimited(&pcie->pdev->dev, "unhandled ERR IRQ\n");
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+ }
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+
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/* Process MSI interrupts */
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if (isr0_status & PCIE_ISR0_MSI_INT_PENDING)
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advk_pcie_handle_msi(pcie);
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