From: "tip-bot2 for Thomas Gleixner" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Michael Kelley <mikelley@microsoft.com>,
Nishanth Menon <nm@ti.com>, Jason Gunthorpe <jgg@nvidia.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: irq/msi] PCI/MSI: Set pci_dev::msi[x]_enabled early
Date: Thu, 16 Dec 2021 21:41:15 -0000 [thread overview]
Message-ID: <163969087559.23020.12079408218134390263.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20211210221813.250049810@linutronix.de>
The following commit has been merged into the irq/msi branch of tip:
Commit-ID: c7ecb95ca6a80b29af0f41cc28c58e542637fbc6
Gitweb: https://git.kernel.org/tip/c7ecb95ca6a80b29af0f41cc28c58e542637fbc6
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Fri, 10 Dec 2021 23:18:44 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Thu, 16 Dec 2021 22:16:37 +01:00
PCI/MSI: Set pci_dev::msi[x]_enabled early
There are quite some places which retrieve the first MSI descriptor to
evaluate whether the setup is for MSI or MSI-X. That's required because
pci_dev::msi[x]_enabled is only set when the setup completed successfully.
There is no real reason why msi[x]_enabled can't be set at the beginning of
the setup sequence and cleared in case of a failure.
Implement that so the MSI descriptor evaluations can be converted to simple
property queries.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.250049810@linutronix.de
---
drivers/pci/msi/msi.c | 23 +++++++++++++++++------
1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index eb917fe..5af8d9b 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -421,11 +421,18 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
struct msi_desc *entry;
int ret;
- pci_msi_set_enable(dev, 0); /* Disable MSI during set up */
+ /*
+ * Disable MSI during setup in the hardware, but mark it enabled
+ * so that setup code can evaluate it.
+ */
+ pci_msi_set_enable(dev, 0);
+ dev->msi_enabled = 1;
entry = msi_setup_entry(dev, nvec, affd);
- if (!entry)
- return -ENOMEM;
+ if (!entry) {
+ ret = -ENOMEM;
+ goto fail;
+ }
/* All MSIs are unmasked by default; mask them all */
pci_msi_mask(entry, msi_multi_mask(entry));
@@ -452,7 +459,6 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
/* Set MSI enabled bits */
pci_intx_for_msi(dev, 0);
pci_msi_set_enable(dev, 1);
- dev->msi_enabled = 1;
pcibios_free_irq(dev);
dev->irq = entry->irq;
@@ -461,6 +467,8 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
err:
pci_msi_unmask(entry, msi_multi_mask(entry));
free_msi_irqs(dev);
+fail:
+ dev->msi_enabled = 0;
return ret;
}
@@ -589,6 +597,9 @@ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
pci_msix_clear_and_set_ctrl(dev, 0, PCI_MSIX_FLAGS_MASKALL |
PCI_MSIX_FLAGS_ENABLE);
+ /* Mark it enabled so setup functions can query it */
+ dev->msix_enabled = 1;
+
pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &control);
/* Request & Map MSI-X table region */
tsize = msix_table_size(control);
@@ -623,9 +634,8 @@ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
dev->msi_irq_groups = groups;
- /* Set MSI-X enabled bits and unmask the function */
+ /* Disable INTX */
pci_intx_for_msi(dev, 0);
- dev->msix_enabled = 1;
/*
* Ensure that all table entries are masked to prevent
@@ -645,6 +655,7 @@ out_free:
free_msi_irqs(dev);
out_disable:
+ dev->msix_enabled = 0;
pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL | PCI_MSIX_FLAGS_ENABLE, 0);
return ret;
next prev parent reply other threads:[~2021-12-16 21:43 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-10 22:18 [patch V3 00/35] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Thomas Gleixner
2021-12-10 22:18 ` [patch V3 01/35] PCI/MSI: Set pci_dev::msi[x]_enabled early Thomas Gleixner
2021-12-13 13:37 ` Jason Gunthorpe
2021-12-16 21:41 ` tip-bot2 for Thomas Gleixner [this message]
2021-12-10 22:18 ` [patch V3 02/35] x86/pci/XEN: Use PCI device property Thomas Gleixner
2021-12-13 13:56 ` Jason Gunthorpe
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 03/35] x86/apic/msi: Use PCI device MSI property Thomas Gleixner
2021-12-11 10:52 ` Greg Kroah-Hartman
2021-12-13 13:59 ` Jason Gunthorpe
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 04/35] genirq/msi: Use PCI device property Thomas Gleixner
2021-12-13 13:59 ` Jason Gunthorpe
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 05/35] powerpc/cell/axon_msi: " Thomas Gleixner
2021-12-11 15:21 ` Arnd Bergmann
2021-12-13 14:01 ` Jason Gunthorpe
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 06/35] powerpc/pseries/msi: Use PCI device properties Thomas Gleixner
2021-12-13 14:04 ` Jason Gunthorpe
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 07/35] device: Move MSI related data into a struct Thomas Gleixner
2021-12-11 15:22 ` Arnd Bergmann
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 08/35] device: Add device:: Msi_data pointer and struct msi_device_data Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 09/35] PCI/MSI: Allocate MSI device data on first use Thomas Gleixner
2021-12-15 17:16 ` [patch V4 09-01/35] PCI/MSI: Decouple MSI[-X] disable from pcim_release() Thomas Gleixner
2021-12-15 17:19 ` [patch V4 09-02/35] PCI/MSI: Allocate MSI device data on first use Thomas Gleixner
2021-12-15 17:46 ` Greg Kroah-Hartman
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-15 17:46 ` [patch V4 09-01/35] PCI/MSI: Decouple MSI[-X] disable from pcim_release() Greg Kroah-Hartman
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:18 ` [patch V3 10/35] platform-msi: Allocate MSI device data on first use Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 11/35] bus: fsl-mc-msi: " Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 12/35] soc: ti: ti_sci_inta_msi: " Thomas Gleixner
2021-12-11 15:22 ` Arnd Bergmann
2021-12-13 17:56 ` Nishanth Menon
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 13/35] genirq/msi: Provide msi_device_populate/destroy_sysfs() Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 14/35] PCI/MSI: Let the irq code handle sysfs groups Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 15/35] platform-msi: Let the core " Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 16/35] genirq/msi: Remove the original sysfs interfaces Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 17/35] platform-msi: Rename functions and clarify comments Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 18/35] platform-msi: Store platform private data pointer in msi_device_data Thomas Gleixner
2021-12-16 21:41 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 19/35] genirq/msi: Consolidate MSI descriptor data Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 20/35] platform-msi: Use msi_desc::msi_index Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 21/35] bus: fsl-mc-msi: " Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 22/35] soc: ti: ti_sci_inta_msi: " Thomas Gleixner
2021-12-13 17:57 ` Nishanth Menon
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 23/35] PCI/MSI: " Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 24/35] PCI/MSI: Provide MSI_FLAG_MSIX_CONTIGUOUS Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 25/35] powerpc/pseries/msi: Let core code check for contiguous entries Thomas Gleixner
2021-12-13 14:05 ` Jason Gunthorpe
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 26/35] genirq/msi: Provide interface to retrieve Linux interrupt number Thomas Gleixner
2021-12-13 14:22 ` Jason Gunthorpe
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 27/35] PCI/MSI: Use __msi_get_virq() in pci_get_vector() Thomas Gleixner
2021-12-13 14:23 ` Jason Gunthorpe
2021-12-16 21:40 ` [tip: irq/msi] PCI/MSI: Use msi_get_virq() " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 28/35] PCI/MSI: Simplify pci_irq_get_affinity() Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-17 22:30 ` [patch V3 28/35] " Nathan Chancellor
2021-12-18 10:25 ` Thomas Gleixner
2021-12-18 19:04 ` Nathan Chancellor
2021-12-18 19:39 ` [tip: irq/msi] PCI/MSI: Unbreak pci_irq_get_affinity() tip-bot2 for Thomas Gleixner
2021-12-18 20:25 ` [patch V3 28/35] PCI/MSI: Simplify pci_irq_get_affinity() Cédric Le Goater
2021-12-20 11:55 ` Thomas Gleixner
2022-01-30 17:12 ` Guenter Roeck
2022-01-31 11:27 ` Thomas Gleixner
2022-01-31 15:21 ` Guenter Roeck
2022-01-31 21:16 ` Thomas Gleixner
2022-02-04 8:57 ` [tip: irq/urgent] PCI/MSI: Remove bogus warning in pci_irq_get_affinity() tip-bot2 for Thomas Gleixner
2022-02-04 11:29 ` Thorsten Leemhuis
2021-12-10 22:19 ` [patch V3 29/35] dmaengine: mv_xor_v2: Get rid of msi_desc abuse Thomas Gleixner
2021-12-13 5:14 ` Vinod Koul
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 30/35] perf/smmuv3: Use msi_get_virq() Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 31/35] iommu/arm-smmu-v3: " Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 32/35] mailbox: bcm-flexrm-mailbox: Rework MSI interrupt handling Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 33/35] bus: fsl-mc: fsl-mc-allocator: Rework MSI handling Thomas Gleixner
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 34/35] soc: ti: ti_sci_inta_msi: Get rid of ti_sci_inta_msi_get_virq() Thomas Gleixner
2021-12-11 15:24 ` Arnd Bergmann
2021-12-13 5:15 ` Vinod Koul
2021-12-13 17:57 ` Nishanth Menon
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-10 22:19 ` [patch V3 35/35] dmaengine: qcom_hidma: Cleanup MSI handling Thomas Gleixner
2021-12-13 5:14 ` Vinod Koul
2021-12-16 21:40 ` [tip: irq/msi] " tip-bot2 for Thomas Gleixner
2021-12-13 18:29 ` [patch V3 00/35] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Nishanth Menon
2021-12-14 9:41 ` Thomas Gleixner
2021-12-14 16:22 ` Nishanth Menon
2021-12-14 16:36 ` Thomas Gleixner
2021-12-14 17:03 ` Thomas Gleixner
2021-12-14 20:15 ` Thomas Gleixner
2021-12-14 20:56 ` Nishanth Menon
2021-12-14 21:19 ` Thomas Gleixner
2021-12-15 16:18 ` Thomas Gleixner
2021-12-15 16:35 ` Thomas Gleixner
2021-12-15 18:08 ` Nishanth Menon
2021-12-16 1:45 ` Nishanth Menon
2021-12-16 17:23 ` Thomas Gleixner
2021-12-16 6:14 ` Michael Kelley (LINUX)
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