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Subject[RFC Patch V1 00/12] Reorganize struct msi_desc to prepare for support of generic MSI
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Recently Marc Zyngier <marc.zyngier@arm.com> has posted a patch set at
https://lkml.org/lkml/2015/7/7/712
to enhance PCI MSI code to support generic MSI.

This is a companion patch set to refine struct msi_desc and related data
structures to support generic MSI, and it would be better to combined with
Marc's patch set. It's also requested by
Stuart Yoder <stuart.yoder@freescale.com>

It first introduces a helper function msi_desc_to_pci_sysdata(), and
convert current PCI drivers to use helper functions to access fields
in struct msi_desc.
Then it moves msi_list from struct pci_dev into struct device and
refines struct msi_desc.
At last it moves alloc_msi_entry() into kernel/irq/msi.c for reuse.

Currently msi_desc_to_pci_sysdata() and msi_desc_to_pci_dev() are
implemented as normal functions instead of inlines to avoid header file
inclusion issue. If inlined version is preferred for performance, we could
move all of first_pci_msi_entry, for_each_pci_msi_entry, msi_desc_to_pci_dev
and msi_desc_to_pci_sysdata from linxu/kernel/msi.h into linux/kernel/pci.h.

This patch set is based on v4.2-rc1 and passes 0day test suite. You
may access the code at:
https://github.com/jiangliu/linux.git msi_desc_v1

Thanks!
Gerry

Jiang Liu (12):
PCI: Add helper function msi_desc_to_pci_sysdata()
MIPS, PCI: Use for_pci_msi_entry() to access MSI device list
PowerPC, PCI: Use for_pci_msi_entry() to access MSI device list
s390/pci: Use for_pci_msi_entry() to access MSI device list
x86, PCI: Use for_pci_msi_entry() to access MSI device list
PCI: Use for_pci_msi_entry() to access MSI device list
sparc, PCI: Use helper functions to access fields in struct msi_desc
PCI: Use helper functions to access fields in struct msi_desc
genirq: Move msi_list from struct pci_dev to struct device
genirq, PCI: Store 'struct device *' instead 'struct pci_dev *' in
struct msi_desc
genirq, PCI: Reorginize struct msi_desc to prepare for support of
generic MSI
genirq, PCI: Move alloc_msi_entry() from PCI MSI code into generic
MSI code

arch/mips/pci/msi-octeon.c | 2 +-
arch/powerpc/platforms/cell/axon_msi.c | 6 +--
arch/powerpc/platforms/pasemi/msi.c | 4 +-
arch/powerpc/platforms/powernv/pci.c | 4 +-
arch/powerpc/platforms/pseries/msi.c | 6 +--
arch/powerpc/sysdev/fsl_msi.c | 4 +-
arch/powerpc/sysdev/mpic_u3msi.c | 4 +-
arch/powerpc/sysdev/ppc4xx_hsta_msi.c | 4 +-
arch/powerpc/sysdev/ppc4xx_msi.c | 4 +-
arch/s390/pci/pci.c | 6 +--
arch/sparc/kernel/pci.c | 2 +-
arch/x86/pci/xen.c | 8 ++--
drivers/base/core.c | 3 ++
drivers/pci/host/pci-keystone-dw.c | 6 +--
drivers/pci/host/pcie-designware.c | 4 +-
drivers/pci/host/pcie-xilinx.c | 12 ++---
drivers/pci/msi.c | 82 +++++++++++++++++---------------
drivers/pci/xen-pcifront.c | 2 +-
include/linux/device.h | 4 ++
include/linux/msi.h | 55 +++++++++++----------
include/linux/pci.h | 1 -
kernel/irq/msi.c | 17 +++++++
22 files changed, 136 insertions(+), 104 deletions(-)

--
1.7.10.4



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