Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754388AbaKXOfl (ORCPT ); Mon, 24 Nov 2014 09:35:41 -0500 Received: from foss-mx-na.foss.arm.com ([217.140.108.86]:37965 "EHLO foss-mx-na.foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754206AbaKXOff (ORCPT ); Mon, 24 Nov 2014 09:35:35 -0500 From: Marc Zyngier To: Thomas Gleixner , Jason Cooper Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jiang Liu , Bjorn Helgaas , Yingjoe Chen , Will Deacon , Catalin marinas , Mark Rutland , Suravee Suthikulpanit , Robert Richter , "Yun Wu (Abel)" Subject: [PATCH v3 00/13] arm64: PCI/MSI: GICv3 ITS support (stacked domain edition) Date: Mon, 24 Nov 2014 14:35:07 +0000 Message-Id: <1416839720-18400-1-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The GICv3 architecture provides a way to implement support for MSI/MSI-X using a specific block called the ITS (Interrupt Translation Service). The ITS can be accurately described as "page tables for interrupts". If you think this sounds scary, you're spot on. It uses a set of opaque memory tables that are manipulated through commands (software almost never touches the tables directly). In order to make it slightly easier to digest, the code has been split into (mostly) logical units. To make things more fun, this relies on Jiang Liu's stacked domain patch series as now merged in tip/irq/irqdomain: - patch 1 imports the new asm-generic/msi.h file into arch/arm64 - patches 2 to 13 are the bulk of the ITS driver. This has been tested on arm64 with an FVP model, and is based on tip/irq/irqdomain. The whole thing is available at: git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git irq/gicv3-its Unless someone screams murder, I consider this to be ready for merge. M. >From v2 [2]: - rebased on top of the stable version of tip/irq/irqdomain - use irq_domain_reset_irq_data instead of irq_domain_set_hwirq_and_chip on the free path - use pci_msi_mask_irq instead of mask_msi_irq - use host_data to pass the ITS structure around - top-level MSI domain is now indentified by the ITS of_node >From v1 [1]: - rebased on top of tip/irq/irqdomain - dropped the arm64-specific implementation of arch_setup_msi_irqs and co. - reworked the whole ITS/MSI setup to use the new MSI/PCI split [1]: http://lwn.net/Articles/619788/ [2]: https://lkml.org/lkml/2014/11/18/825 Marc Zyngier (13): arm64: PCI/MSI: Use asm-generic/msi.h irqchip: GICv3: Convert to domain hierarchy irqchip: GICv3: rework redistributor structure irqchip: GICv3: ITS command queue irqchip: GICv3: ITS: irqchip implementation irqchip: GICv3: ITS: LPI allocator irqchip: GICv3: ITS: tables allocators irqchip: GICv3: ITS: device allocation and configuration irqchip: GICv3: ITS: MSI support irqchip: GICv3: ITS: DT probing and initialization irqchip: GICv3: ITS: plug ITS init into main GICv3 code irqchip: GICv3: ITS: enable compilation of the ITS driver irqchip: GICv3: Binding updates for ITS Documentation/devicetree/bindings/arm/gic-v3.txt | 39 + arch/arm64/Kconfig | 1 + arch/arm64/include/asm/Kbuild | 1 + drivers/irqchip/Kconfig | 5 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-gic-v3-its.c | 1402 ++++++++++++++++++++++ drivers/irqchip/irq-gic-v3.c | 156 ++- include/linux/irqchip/arm-gic-v3.h | 128 ++ 8 files changed, 1693 insertions(+), 40 deletions(-) create mode 100644 drivers/irqchip/irq-gic-v3-its.c -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/