Recently Marc Zyngier <marc.zyngier@xxxxxxx> 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@xxxxxxxxxxxxx> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
