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 version 3 follows: * PATCH version 2 sent on June, 6th 2013 * RFC version 1 sent on March, 26th 2013 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). It would be great if some of those patches were taken for 3.11. For example, PATCH 1, PATCH 2, PATCH 5 and PATCH 7 are completely independent from each other. The patches do the following: * Patch 1 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. This patch needs the Ack of Grant Likely. * Patch 2 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 needs the Ack from Bjorn Helgaas. * 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 needs the Ack from Bjorn Helgaas. * Patch 4 adds a small registry of msi_chip <-> of_node in the OF code. It was originally located in drivers/pci/msi.c, but Bjorn Helgaas suggested that it probably belongs to drivers/of/. This patch needs the Ack from Grant Likely or Rob Herring, and probably Bjorn Helgaas as well. * Patch 5 makes some not very interesting preparation in the Armada 370/XP IRQ controller driver. This patch needs the Ack from Thomas Gleixner. * Patch 6 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 7 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 needs the Ack from Russell King. * Patch 8 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 9 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 10 tunes Kconfig to indicate that Armada 370/XP supports MSI. This patch needs the Ack from Jason Cooper, Gregory Clement and/or Andrew Lunn, the Marvell Maintainers. * Patch 8 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 set of patches currently applies on top of the current "for-next" branch of Jason Cooper's repository + the irqdomain/test branch of Grant Likely's tree. The Device Tree binding documentation updates will be added once the general approach is agreed on. Thanks, Thomas Thierry Reding (1): PCI: Introduce new MSI chip infrastructure Thomas Petazzoni (10): irqdomain: add irq_alloc_mapping() function pci: use weak functions for MSI arch-specific functions of: pci: add registry of MSI chips 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: indicate that this platform supports MSI arm: mvebu: link PCIe controllers to the MSI controller 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/arm/mach-mvebu/Kconfig | 1 + arch/mips/include/asm/pci.h | 5 - arch/powerpc/include/asm/pci.h | 5 - arch/s390/include/asm/pci.h | 4 - arch/x86/include/asm/pci.h | 28 ------ arch/x86/kernel/x86_init.c | 21 +++++ drivers/irqchip/irq-armada-370-xp.c | 155 ++++++++++++++++++++++++++++++- drivers/of/of_pci.c | 22 +++++ drivers/pci/host/pci-mvebu.c | 26 ++++++ drivers/pci/msi.c | 80 +++++++++++----- drivers/pci/probe.c | 1 + include/linux/irqdomain.h | 2 + include/linux/msi.h | 28 +++++- include/linux/of_pci.h | 4 + include/linux/pci.h | 1 + kernel/irq/irqdomain.c | 32 +++++++ 23 files changed, 371 insertions(+), 69 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
