From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from exprod5og125.obsmtp.com ([64.18.0.245]:45253 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750709AbbDUEFb (ORCPT ); Tue, 21 Apr 2015 00:05:31 -0400 Received: by paboj16 with SMTP id oj16so228233250pab.0 for ; Mon, 20 Apr 2015 21:05:30 -0700 (PDT) From: Duc Dang To: Bjorn Helgaas , Arnd Bergmann , Grant Likely , Liviu Dudau , Marc Zyngier Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Tanmay Inamdar , Loc Ho , Feng Kan , Duc Dang Subject: [PATCH v5 0/4]PCI: X-Gene: Add APM X-Gene v1 MSI/MSIX termination driver Date: Mon, 20 Apr 2015 21:04:20 -0700 Message-Id: In-Reply-To: <55310050.7000003@arm.com> References: <55310050.7000003@arm.com> Sender: linux-pci-owner@vger.kernel.org List-ID: This patch set adds MSI/MSIX termination driver support for APM X-Gene v1 SoC. APM X-Gene v1 SoC supports its own implementation of MSI, which is not compliant to GIC V2M specification for MSI Termination. There is single MSI block in X-Gene v1 SOC which serves all 5 PCIe ports. This MSI block supports 2048 MSI termination ports coalesced into 16 physical HW IRQ lines and shared across all 5 PCIe ports. As the version 5 of this patch, the total MSI vectors this driver supports is reduced to 256 to maintain the correct set_affinity behavior for each MSI. v5 changes: 1. Implement set_affinity for each MSI by statically allocating 2 MSI GIC IRQs for each X-Gene CPU core and moving MSI vectors around these GIC IRQs to steer them to target CPU core. As a consequence, the total MSI vectors that X-Gene v1 supports is reduced to 256. v4 changes: 1. Remove affinity setting for each MSI 2. Add description about register layout, MSI termination address and data 3. Correct total number of MSI vectors to 2048 4. Clean up error messages 5. Remove unused module code v3 changes: 1. Implement MSI support using PCI MSI IRQ domain 2. Only use msi_controller to store IRQ domain v2 changes: 1. Use msi_controller structure 2. Remove arch hooks arch_teardown_msi_irqs and arch_setup_msi_irqs .../devicetree/bindings/pci/xgene-pci-msi.txt | 63 +++ MAINTAINERS | 8 + arch/arm64/boot/dts/apm/apm-storm.dtsi | 27 ++ drivers/pci/host/Kconfig | 6 + drivers/pci/host/Makefile | 1 + drivers/pci/host/pci-xgene-msi.c | 477 +++++++++++++++++++++ drivers/pci/host/pci-xgene.c | 21 + 7 files changed, 603 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/xgene-pci-msi.txt create mode 100644 drivers/pci/host/pci-xgene-msi.c -- 1.9.1