Hello, This set of patches introduces Message Signaled Interrupt support in the Marvell EBU PCIe driver. It has been successfully tested on the Armada XP GP platform with an Intel e1000e PCIe network card that supports MSI. This patch set is intended for merging in 3.12, so the respective maintainers of the different areas are invited to review/ack the patches, see below for the details. Note that several of those patches are also needed for the Tegra PCIe driver. There are still missing ACKs from Grant Likely (5, 6, 7), Thomas Gleixner (8, 9) and Bjorn Helgaas (2, 12). The patches do the following: * Patch 1 reworks how the architecture-specific MSI functions can be overriden by architecture-specific code, by using weak functions. It was suggested by Bjorn Helgaas. This patch has been acked by Bjorn Helgaas, the PCI maintainter. * Patch 2 removes the ARCH_SUPPORTS_MSI hidden kconfig boolean which is no longer needed now that we have weak functions for all MSI architecture-specific hooks. This patch needs the Ack from Bjorn Helgaas, and the relevant architecture maintainers. * Patch 3 adds a minimal msi_chip infrastructure, that allows a pci_bus to be connected to a msi_chip, and that provides default implementations of the architecture-specific MSI functions to use msi_chip. This patch has been acked by Bjorn Helgaas, the PCI maintainter. * Patch 4 adds an IRQ domain function that allows to allocate dynamically a free hwirq number from an IRQ domain, and create a virq mapping to it. It was suggested by Grant Likely in order to remove the hwirq allocation code from the IRQ driver itself. Patch has been Acked by Grant Likely, irq_domain maintainer. * Patch 5 refactors the __irq_domain_add() function in the irq_domain code, in preparation for the introduction of MSI support in irq_domain. This patch needs the ACK of Grant Likely. * Patch 6 allows to create an irq_domain associated with a msi_chip, thanks to the new irq_domain_add_msi() function. This patch needs the ACK of Grant Likely. * Patch 7 adds a new function irq_find_msi_host() to find the MSI-type interrupt controller associated to a given DT node, and adjusts irq_find_host() to not match MSI-type interrupt controllers. This patch needs the ACK of Grant Likely. * Patch 8 makes some not very interesting preparation in the Armada 370/XP IRQ controller driver. This patch needs the Ack from Thomas Gleixner. * Patch 9 implements the MSI support in the Armada 370/XP IRQ controller driver. It registers an msi_chip using the msi_chip_add() function added in PATCH 3. This patch needs the Ack from Thomas Gleixner. * Patch 10 extends the ARM PCI core to expose ->add_bus() and ->remove_bus() hooks to PCI drivers. This was suggested by Bjorn Helgaas to allow the PCI driver to connected the PCI busses with the corresponding MSI chip. This patch has been Acked by Russell King, the ARM maintainer. * Patch 11 adjust the Armada 370/XP Device Tree to indicate that the MPIC is not only an interrupt-controller, but also an msi-controller. This patch needs the Ack from Jason Cooper, Gregory Clement and/or Andrew Lunn, the Marvell maintainers. * Patch 12 adds MSI support in the Marvell PCIe host controller driver. The work to do here is minimal: get a reference to the msi-parent controller thanks to msi_chip_find_by_of_node(), and link it to the pci_bus structure before the bus gets enumerated. This patch needs the Ack from Bjorn Helgaas. * Patch 13 adjusts the Armada 370/XP Device Tree to add the msi-parent properties in the PCIe controller nodes. This patch needs the Ack from Jason Cooper, Gregory Clement and/or Andrew Lunn, the Marvell Maintainers. This version 6 follows: * PATCH version 5 sent on July, 15th 2013 * PATCH version 4 sent on July, 1st 2013 * PATCH version 3 sent on June, 19th 2013 * PATCH version 2 sent on June, 6th 2013 * RFC version 1 sent on March, 26th 2013 Changes since v5: * Rebased on top of 3.11-rc3. * Implemented the suggestions of Grant Likely on "irqdomain: add irq_alloc_mapping() function" and added his Acked-by. * Added Bjorn Helgaas Acked-by on "PCI: use weak functions for MSI arch-specific functions". * Added Bjorn Helgaas Acked-by on "PCI: Introduce new MSI chip infrastructure". * Remove the drivers/of global registry of irq_chip, and as suggested by Grant Likely, create an association between an irq_domain and a msi_chip. This required refactoring the __irq_domain_add() function, adding a 'msi_chip' pointer to 'irq_domain', adding an irq_domain_add_msi() function and a irq_find_msi_host() function. * Added Russell King Acked-by on "ARM: pci: add ->add_bus() and ->remove_bus() hooks to hw_pci" Changes since v4: * Rebased on top of 3.11-rc1. * Slightly rework the implementation of arch_setup_msi_irq(), arch_teardown_msi_irq and arch_msi_check_device() according to the suggestions of Bjorn Helgaas (PATCH 4) * Make a few improvements to the msi_chip registry, according to the suggestion of Bjorn Helgaas and Rob Herring: coding style fixes, usage of mutex while traversing the list of msi_chip, usage of of_pci_msi_* prefix instead of just of_msi_*. Changes since v3: * Keep only a default_teardown_msi_irqs() function needed for the Xen PCI x86 code, and remove all other default_*() function and put the default behavior directly in the weak functions. Suggested by Thierry Redding and Bjorn Helgaas. * Misc small improvements the MSI chip registry code: compiled only under CONFIG_PCI_MSI, functions exported to modules, addition of an of_msi_chip_remove() function, renaming of of_msi_chip_find_by_node() to of_find_msi_chip_by_node(), move the test of the "msi-controller" property to the of_msi_chip_add() function, renamed the list_head field from link to list, added dummy functions in the header files when !CONFIG_PCI_MSI && !CONFIG_OF. All suggested by Thierry Redding. * Add a patch that entirely removes the ARCH_SUPPORTS_MSI, as we now have weak functions, so even if an arch doesn't actually use/support MSI, the code will build properly. Suggested by Thierry Redding. * Added Device Tree binding documentation updates for the IRQ controller and the PCIe controller. Changes since v2: * Add an IRQ domain function that allows to allocate dynamically a free hwirq number from an IRQ domain, and create a virq mapping to it. It was suggested by Grant Likely in order to remove the hwirq allocation code from the IRQ driver itself. (PATCH 1) * Separate the use of weak functions from the introduction of the msi_chip infrastructure, and use weak functions for all architecture-specific MSI hooks. Suggested by Bjorn Helgaas (PATCH 2). * Move the msi_chip registry to drivers/of. Suggested by Bjorn Helgaas (PATCH 4). * Use pcibios_add_bus() and pcibios_remove_bus() to connect the PCI busses to their msi_chip, as suggested by Bjorn Helgaas. Requires some ARM PCI core changes (PATCH 7), and then changes to the PCI driver itself (PATCH 9). This set of patches applies on top of 3.11-rc3, and is available as a Git branch at https://github.com/MISL-EBU-System-SW/mainline-public/tree/marvell-pcie-msi-v6. Thanks, Thomas Thierry Reding (1): PCI: Introduce new MSI chip infrastructure Thomas Petazzoni (12): PCI: use weak functions for MSI arch-specific functions PCI: remove ARCH_SUPPORTS_MSI kconfig option irqdomain: add irq_alloc_mapping() function irqdomain: refactor __irq_domain_add() irqdomain: add support to associate an irq_domain with a msi_chip irqdomain: add function to find a MSI irq_domain irqchip: armada-370-xp: properly request resources irqchip: armada-370-xp: implement MSI support ARM: pci: add ->add_bus() and ->remove_bus() hooks to hw_pci ARM: mvebu: the MPIC now provides MSI controller features PCI: mvebu: add support for MSI ARM: mvebu: link PCIe controllers to the MSI controller .../devicetree/bindings/arm/armada-370-xp-mpic.txt | 3 + .../devicetree/bindings/pci/mvebu-pci.txt | 3 + arch/arm/Kconfig | 1 - arch/arm/boot/dts/armada-370-xp.dtsi | 1 + arch/arm/boot/dts/armada-370.dtsi | 1 + arch/arm/boot/dts/armada-xp-mv78230.dtsi | 1 + arch/arm/boot/dts/armada-xp-mv78260.dtsi | 1 + arch/arm/boot/dts/armada-xp-mv78460.dtsi | 1 + arch/arm/include/asm/mach/pci.h | 4 + arch/arm/kernel/bios32.c | 16 +++ arch/ia64/Kconfig | 1 - arch/mips/Kconfig | 2 - arch/mips/include/asm/pci.h | 5 - arch/powerpc/Kconfig | 1 - arch/powerpc/include/asm/pci.h | 5 - arch/s390/Kconfig | 1 - arch/s390/include/asm/pci.h | 4 - arch/sparc/Kconfig | 1 - arch/tile/Kconfig | 1 - arch/x86/Kconfig | 1 - arch/x86/include/asm/pci.h | 28 ---- arch/x86/kernel/x86_init.c | 21 +++ drivers/irqchip/irq-armada-370-xp.c | 153 ++++++++++++++++++++- drivers/pci/Kconfig | 4 - drivers/pci/host/pci-mvebu.c | 31 +++++ drivers/pci/msi.c | 66 +++++---- drivers/pci/probe.c | 1 + include/linux/irqdomain.h | 62 ++++++++- include/linux/msi.h | 18 ++- include/linux/pci.h | 1 + kernel/irq/irqdomain.c | 89 +++++++++--- 31 files changed, 422 insertions(+), 106 deletions(-) -- 1.8.1.2 -- 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
