[patch V3 00/35] genirq/msi, PCI/MSI: Spring cleaning - Part 2

Thomas Gleixner
2021-12-10T22:19:11Z

This is the second part of [PCI]MSI refactoring which aims to provide the
ability of expanding MSI-X vectors after enabling MSI-X.

This is based on the first part of this work which can be found here:

https://lore.kernel.org/r/20211206210147.872865823@linutronix.de

and has been applied to:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/msi

This second part has the following important changes:

1) Cleanup of the MSI related data in struct device

struct device contains at the moment various MSI related parts. Some
of them (the irq domain pointer) cannot be moved out, but the rest
can be allocated on first use. This is in preparation of adding more
per device MSI data later on.

2) Consolidation of sysfs handling

As a first step this moves the sysfs pointer from struct msi_desc
into the new per device MSI data structure where it belongs.

Later changes will cleanup this code further, but that's not possible
at this point.

3) Use PCI device properties instead of looking up MSI descriptors and
analysing their data.

4) Provide a function to retrieve the Linux interrupt number for a given
MSI index similar to pci_irq_vector() and cleanup all open coded
variants.

It's also available from git:

git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git msi-v3-part-2

Part 3 of this effort is available on top

git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git msi-v3-part-3

Part 3 is not going to be reposted as there is no change vs. V2.

V2 of part 2 can be found here:

https://lore.kernel.org/r/20211206210307.625116253@linutronix.de

Changes versus V2:

- Use PCI device properties instead of creating a new set - Jason

- Picked up Reviewed/Tested/Acked-by tags as appropriate

Thanks,

tglx
---
arch/powerpc/platforms/cell/axon_msi.c | 5
arch/powerpc/platforms/pseries/msi.c | 38 +---
arch/x86/kernel/apic/msi.c | 5
arch/x86/pci/xen.c | 11 -
drivers/base/platform-msi.c | 152 ++++++++-----------
drivers/bus/fsl-mc/dprc-driver.c | 8 -
drivers/bus/fsl-mc/fsl-mc-allocator.c | 9 -
drivers/bus/fsl-mc/fsl-mc-msi.c | 26 +--
drivers/dma/mv_xor_v2.c | 16 --
drivers/dma/qcom/hidma.c | 44 ++---
drivers/dma/ti/k3-udma-private.c | 6
drivers/dma/ti/k3-udma.c | 14 -
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 23 --
drivers/irqchip/irq-mbigen.c | 4
drivers/irqchip/irq-mvebu-icu.c | 12 -
drivers/irqchip/irq-ti-sci-inta.c | 2
drivers/mailbox/bcm-flexrm-mailbox.c | 9 -
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 4
drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c | 4
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c | 5
drivers/pci/msi/irqdomain.c | 20 ++
drivers/pci/msi/legacy.c | 6
drivers/pci/msi/msi.c | 133 ++++++----------
drivers/pci/xen-pcifront.c | 2
drivers/perf/arm_smmuv3_pmu.c | 5
drivers/soc/fsl/dpio/dpio-driver.c | 8 -
drivers/soc/ti/k3-ringacc.c | 6
drivers/soc/ti/ti_sci_inta_msi.c | 22 --
drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c | 4
include/linux/device.h | 25 ++-
include/linux/fsl/mc.h | 4
include/linux/msi.h | 95 ++++--------
include/linux/pci.h | 1
include/linux/soc/ti/ti_sci_inta_msi.h | 1
kernel/irq/msi.c | 158 +++++++++++++++-----
35 files changed, 429 insertions(+), 458 deletions(-)