From: "Pali Rohár" <pali@kernel.org>
To: Marc Zyngier <maz@kernel.org>
Cc: "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Rob Herring" <robh@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Russell King" <rmk+kernel@armlinux.org.uk>,
"Marek Behún" <kabel@kernel.org>,
"Remi Pommarel" <repk@triplefau.lt>, Xogium <contact@xogium.me>,
"Tomasz Maciej Nowak" <tmn505@gmail.com>,
linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 18/42] PCI: aardvark: Correctly clear and unmask all MSI interrupts
Date: Fri, 7 May 2021 12:21:36 +0200 [thread overview]
Message-ID: <20210507102136.2mlov44cywayzldt@pali> (raw)
In-Reply-To: <87bl9mq20r.wl-maz@kernel.org>
On Friday 07 May 2021 11:19:48 Marc Zyngier wrote:
> On Thu, 06 May 2021 16:31:29 +0100,
> Pali Rohár <pali@kernel.org> wrote:
> >
> > Define a new macro PCIE_MSI_ALL_MASK and use it for masking, unmasking and
> > clearing all MSI 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 | 16 ++++++++++------
> > 1 file changed, 10 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
> > index 498810c00b6d..5e0243b2c473 100644
> > --- a/drivers/pci/controller/pci-aardvark.c
> > +++ b/drivers/pci/controller/pci-aardvark.c
> > @@ -117,6 +117,7 @@
> > #define PCIE_MSI_ADDR_HIGH_REG (CONTROL_BASE_ADDR + 0x54)
> > #define PCIE_MSI_STATUS_REG (CONTROL_BASE_ADDR + 0x58)
> > #define PCIE_MSI_MASK_REG (CONTROL_BASE_ADDR + 0x5C)
> > +#define PCIE_MSI_ALL_MASK GENMASK(31, 0)
> > #define PCIE_MSI_PAYLOAD_REG (CONTROL_BASE_ADDR + 0x9C)
> > #define PCIE_MSI_DATA_MASK GENMASK(15, 0)
> >
> > @@ -386,19 +387,22 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie)
> > advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG);
> >
> > /* Clear all interrupts */
> > + advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_STATUS_REG);
> > advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_REG);
> > advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG);
> > advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG);
> >
> > /* Disable All ISR0/1 Sources */
> > - reg = PCIE_ISR0_ALL_MASK;
> > - reg &= ~PCIE_ISR0_MSI_INT_PENDING;
> > - advk_writel(pcie, reg, PCIE_ISR0_MASK_REG);
> > -
> > + advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_MASK_REG);
> > advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG);
> >
> > /* Unmask all MSIs */
> > - advk_writel(pcie, 0, PCIE_MSI_MASK_REG);
> > + advk_writel(pcie, ~(u32)PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG);
>
> I really wonder why you'd unmask all MSIs. Yes, the current code does
> that already, but I'd expect MSIs to be individually unmasked as they
> get enabled by the core code.
Individual unmasking is implemented in later patches in this patch series.
> Thanks,
>
> M.
>
> > +
> > + /* Unmask summary MSI interrupt */
> > + reg = advk_readl(pcie, PCIE_ISR0_MASK_REG);
> > + reg &= ~PCIE_ISR0_MSI_INT_PENDING;
> > + advk_writel(pcie, reg, PCIE_ISR0_MASK_REG);
> >
> > /* Enable summary interrupt for GIC SPI source */
> > reg = PCIE_IRQ_ALL_MASK & (~PCIE_IRQ_ENABLE_INTS_MASK);
> > @@ -1049,7 +1053,7 @@ static void advk_pcie_handle_msi(struct advk_pcie *pcie)
> >
> > msi_mask = advk_readl(pcie, PCIE_MSI_MASK_REG);
> > msi_val = advk_readl(pcie, PCIE_MSI_STATUS_REG);
> > - msi_status = msi_val & ~msi_mask;
> > + msi_status = msi_val & ((~msi_mask) & PCIE_MSI_ALL_MASK);
> >
> > for (msi_idx = 0; msi_idx < MSI_IRQ_NUM; msi_idx++) {
> > if (!(BIT(msi_idx) & msi_status))
> > --
> > 2.20.1
> >
> >
>
> --
> Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2021-05-07 10:21 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-06 15:31 [PATCH 00/42] PCI: aardvark: Various driver fixes Pali Rohár
2021-05-06 15:31 ` [PATCH 01/42] PCI: aardvark: Fix kernel panic during PIO transfer Pali Rohár
2021-05-19 8:06 ` Pali Rohár
2021-05-06 15:31 ` [PATCH 02/42] PCI: aardvark: Fix checking for PIO Non-posted Request Pali Rohár
2021-05-06 15:31 ` [PATCH 03/42] PCI: aardvark: Fix checking for PIO status Pali Rohár
2021-05-06 15:31 ` [PATCH 04/42] PCI: aardvark: Increase polling delay to 1.5s while waiting for PIO response Pali Rohár
2021-05-06 15:31 ` [PATCH 05/42] PCI: pci-bridge-emul: Add PCIe Root Capabilities Register Pali Rohár
2021-05-06 23:10 ` Bjorn Helgaas
2021-05-07 14:40 ` Pali Rohár
2021-05-07 16:41 ` Bjorn Helgaas
2021-05-06 15:31 ` [PATCH 06/42] PCI: aardvark: Fix reporting CRS Software Visibility on emulated bridge Pali Rohár
2021-05-07 13:03 ` Bjorn Helgaas
2021-05-07 15:25 ` Pali Rohár
2021-05-07 15:33 ` Pali Rohár
2021-05-06 15:31 ` [PATCH 07/42] PCI: aardvark: Fix link training Pali Rohár
2021-05-06 15:31 ` [PATCH 08/42] PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros Pali Rohár
2021-05-06 15:31 ` [PATCH 09/42] PCI: aardvark: Fix PCIe Max Payload Size setting Pali Rohár
2021-05-06 15:31 ` [PATCH 10/42] PCI: aardvark: Implement workaround for the readback value of VEND_ID Pali Rohár
2021-05-06 15:31 ` [PATCH 11/42] PCI: aardvark: Do not touch status bits of masked interrupts in interrupt handler Pali Rohár
2021-05-06 15:31 ` [PATCH 12/42] PCI: aardvark: Check for virq mapping when processing INTx IRQ Pali Rohár
2021-05-07 9:15 ` Marc Zyngier
2021-06-04 16:24 ` Pali Rohár
2021-06-04 16:29 ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 13/42] PCI: aardvark: Remove irq_mask_ack callback for INTx interrupts Pali Rohár
2021-05-07 9:16 ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 14/42] PCI: aardvark: Don't mask irq when mapping Pali Rohár
2021-05-07 9:20 ` Marc Zyngier
2021-05-07 9:27 ` Pali Rohár
2021-05-06 15:31 ` [PATCH 15/42] PCI: aardvark: Change name of INTx irq_chip to advk-INT Pali Rohár
2021-05-07 9:08 ` Marc Zyngier
2021-05-24 14:36 ` Marek Behún
2021-05-24 15:14 ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 16/42] PCI: aardvark: Remove unneeded goto Pali Rohár
2021-05-06 15:31 ` [PATCH 17/42] PCI: aardvark: Fix support for MSI interrupts Pali Rohár
2021-05-07 10:16 ` Marc Zyngier
2021-05-07 14:44 ` Pali Rohár
2021-05-07 16:24 ` Marc Zyngier
2021-06-04 16:02 ` Pali Rohár
2021-06-04 16:22 ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 18/42] PCI: aardvark: Correctly clear and unmask all " Pali Rohár
2021-05-07 10:19 ` Marc Zyngier
2021-05-07 10:21 ` Pali Rohár [this message]
2021-05-06 15:31 ` [PATCH 19/42] PCI: aardvark: Fix setting MSI address Pali Rohár
2021-05-07 10:25 ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 20/42] PCI: aardvark: Add support for more than 32 MSI interrupts Pali Rohár
2021-07-02 21:35 ` Pali Rohár
2021-05-06 15:31 ` [PATCH 21/42] PCI: aardvark: Add support for masking " Pali Rohár
2021-05-06 15:31 ` [PATCH 22/42] PCI: aardvark: Enable MSI-X support Pali Rohár
2021-05-06 15:31 ` [PATCH 23/42] PCI: aardvark: Fix support for ERR interrupt on emulated bridge Pali Rohár
2021-05-06 15:31 ` [PATCH 24/42] PCI: aardvark: Fix support for PME " Pali Rohár
2021-05-06 15:31 ` [PATCH 25/42] PCI: aardvark: Fix support for PME requester " Pali Rohár
2021-05-06 15:31 ` [PATCH 26/42] PCI: aardvark: Fix support for bus mastering and PCI_COMMAND " Pali Rohár
2021-05-06 15:31 ` [PATCH 27/42] PCI: aardvark: Disable bus mastering and mask all interrupts when unbinding driver Pali Rohár
2021-05-06 15:31 ` [PATCH 28/42] PCI: aardvark: Free config space for emulated root bridge when unbinding driver to fix memory leak Pali Rohár
2021-05-06 15:31 ` [PATCH 29/42] PCI: aardvark: Reset PCIe card and disable PHY when unbinding driver Pali Rohár
2021-05-06 15:31 ` [PATCH 30/42] PCI: aardvark: Rewrite irq code to chained irq handler Pali Rohár
2021-05-06 15:31 ` [PATCH 31/42] PCI: aardvark: Use separate INTA interrupt for emulated root bridge Pali Rohár
2021-05-06 15:31 ` [PATCH 32/42] PCI: pci-bridge-emul: Add description for class_revision field Pali Rohár
2021-05-06 15:31 ` [PATCH 33/42] PCI: pci-bridge-emul: Add definitions for missing capabilities registers Pali Rohár
2021-05-06 15:31 ` [PATCH 34/42] PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on emulated bridge Pali Rohár
2021-05-06 15:31 ` [PATCH 35/42] PCI: aardvark: Add support for PCI_BRIDGE_CTL_BUS_RESET " Pali Rohár
2021-05-06 15:31 ` [PATCH 36/42] PCI: aardvark: Replace custom PCIE_CORE_ERR_CAPCTL_* macros by linux/pci_regs.h macros Pali Rohár
2021-05-06 15:31 ` [PATCH 37/42] PCI: aardvark: Replace custom PCIE_CORE_INT_* macros by linux PCI_INTERRUPT_* values Pali Rohár
2021-05-06 15:31 ` [PATCH 38/42] PCI: aardvark: Cleanup some register macros Pali Rohár
2021-05-06 15:31 ` [PATCH 39/42] PCI: aardvark: Add comments for OB_WIN_ENABLE and ADDR_WIN_DISABLE Pali Rohár
2021-05-06 15:31 ` [PATCH 40/42] PCI: pci-bridge-emul: re-arrange register tests Pali Rohár
2021-05-06 15:31 ` [PATCH 41/42] PCI: pci-bridge-emul: add support for PCIe extended capabilities Pali Rohár
2021-05-06 15:31 ` [PATCH 42/42] PCI: aardvark: Add support for Advanced Error Reporting registers on emulated bridge Pali Rohár
2021-06-03 15:16 ` [PATCH 00/42] PCI: aardvark: Various driver fixes Lorenzo Pieralisi
2021-06-03 17:02 ` Pali Rohár
2021-06-03 18:02 ` Simon Glass
2021-06-03 18:18 ` Pali Rohár
2021-06-04 14:05 ` Lorenzo Pieralisi
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