From patchwork Wed Oct 14 15:33:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Auger Eric X-Patchwork-Id: 54958 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-wi0-f199.google.com (mail-wi0-f199.google.com [209.85.212.199]) by patches.linaro.org (Postfix) with ESMTPS id 98C3420490 for ; Wed, 14 Oct 2015 15:33:39 +0000 (UTC) Received: by wicgb1 with SMTP id gb1sf28601960wic.3 for ; Wed, 14 Oct 2015 08:33:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:x-original-sender:x-original-authentication-results :precedence:mailing-list:list-id:list-post:list-help:list-archive :list-unsubscribe; bh=KrYUT1b4nZIFXhehsSlTAAspIMEPbkX00WwSgBKa9wo=; b=GWVIqWLI69PsuSLG/EFc0AmmqeEYibMEpeGulosBml//NXHKjjDXEvCdC4ZpLlqxY0 3t1AyiSMWAfRZDIwpd0WwonBSrOxgzYWjn65BthrzRASm7ZWksZseFifDkdcQzeivDCk dLN+Bisc6+VXzxvfWiaSV0G0zmUWA05se0yr0QXDXs2UQ37ttfQ1r9b72i9HJM4fOmjN UItQo9AICSVhQX4AhjMz6cNc4VjNMJQKnQDLngTFWzt+VahgjTIEn8WgRzcHkdp/FO4m yZGTqk7pFLQDJpldyxDnuW58hrFQv49oys0pzNFs/Y6pnIJIEBebwlGHK6hOE/Yu4Cx6 ehyw== X-Gm-Message-State: ALoCoQn58ia1/cxUnpXcX/dk0W68uXIUY4t2UJFZksmvSB0r8WmH64sR7U0hoJ7Y0WA1otlSxXtx X-Received: by 10.112.198.33 with SMTP id iz1mr931699lbc.8.1444836818896; Wed, 14 Oct 2015 08:33:38 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.25.168.20 with SMTP id r20ls50247lfe.75.gmail; Wed, 14 Oct 2015 08:33:38 -0700 (PDT) X-Received: by 10.25.88.67 with SMTP id m64mr1301977lfb.23.1444836818761; Wed, 14 Oct 2015 08:33:38 -0700 (PDT) Received: from mail-lb0-f179.google.com (mail-lb0-f179.google.com. [209.85.217.179]) by mx.google.com with ESMTPS id rf9si5933635lbb.47.2015.10.14.08.33.38 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Oct 2015 08:33:38 -0700 (PDT) Received-SPF: pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.179 as permitted sender) client-ip=209.85.217.179; Received: by lbcao8 with SMTP id ao8so49246285lbc.3 for ; Wed, 14 Oct 2015 08:33:38 -0700 (PDT) X-Received: by 10.112.146.104 with SMTP id tb8mr1992340lbb.35.1444836818536; Wed, 14 Oct 2015 08:33:38 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.112.59.35 with SMTP id w3csp80664lbq; Wed, 14 Oct 2015 08:33:37 -0700 (PDT) X-Received: by 10.180.188.101 with SMTP id fz5mr5630324wic.3.1444836817872; Wed, 14 Oct 2015 08:33:37 -0700 (PDT) Received: from mail-wi0-f171.google.com (mail-wi0-f171.google.com. [209.85.212.171]) by mx.google.com with ESMTPS id jd4si11304038wjb.68.2015.10.14.08.33.37 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Oct 2015 08:33:37 -0700 (PDT) Received-SPF: pass (google.com: domain of eric.auger@linaro.org designates 209.85.212.171 as permitted sender) client-ip=209.85.212.171; Received: by wicgb1 with SMTP id gb1so235630277wic.1 for ; Wed, 14 Oct 2015 08:33:37 -0700 (PDT) X-Received: by 10.180.208.68 with SMTP id mc4mr5524511wic.60.1444836803142; Wed, 14 Oct 2015 08:33:23 -0700 (PDT) Received: from new-host-20.home (LMontsouris-657-1-37-90.w80-11.abo.wanadoo.fr. [80.11.198.90]) by smtp.gmail.com with ESMTPSA id z4sm6214934wjz.29.2015.10.14.08.33.21 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 14 Oct 2015 08:33:22 -0700 (PDT) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, alex.williamson@redhat.com, b.reynal@virtualopensystems.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: suravee.suthikulpanit@amd.com, thomas.lendacky@amd.com, christoffer.dall@linaro.org, linux-kernel@vger.kernel.org, patches@linaro.org Subject: [PATCH] VFIO: platform: AMD xgbe reset module Date: Wed, 14 Oct 2015 15:33:12 +0000 Message-Id: <1444836792-2405-1-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: eric.auger@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.179 as permitted sender) smtp.mailfrom=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , This patch introduces a module that registers and implements a low-level reset function for the AMD XGBE device. it performs the following actions: - reset the PHY - disable auto-negotiation - disable & clear auto-negotiation IRQ - soft-reset the MAC Those tiny pieces of code are inherited from the native xgbe driver. Signed-off-by: Eric Auger --- drivers/vfio/platform/reset/Kconfig | 7 ++ drivers/vfio/platform/reset/Makefile | 2 + .../vfio/platform/reset/vfio_platform_amdxgbe.c | 130 +++++++++++++++++++++ drivers/vfio/platform/vfio_platform_common.c | 5 + 4 files changed, 144 insertions(+) create mode 100644 drivers/vfio/platform/reset/vfio_platform_amdxgbe.c diff --git a/drivers/vfio/platform/reset/Kconfig b/drivers/vfio/platform/reset/Kconfig index 746b96b..ed9bb28 100644 --- a/drivers/vfio/platform/reset/Kconfig +++ b/drivers/vfio/platform/reset/Kconfig @@ -5,3 +5,10 @@ config VFIO_PLATFORM_CALXEDAXGMAC_RESET Enables the VFIO platform driver to handle reset for Calxeda xgmac If you don't know what to do here, say N. +config VFIO_PLATFORM_AMDXGBE_RESET + tristate "VFIO support for AMD XGBE reset" + depends on VFIO_PLATFORM + help + Enables the VFIO platform driver to handle reset for AMD XGBE + + If you don't know what to do here, say N. diff --git a/drivers/vfio/platform/reset/Makefile b/drivers/vfio/platform/reset/Makefile index 2a486af..93f4e23 100644 --- a/drivers/vfio/platform/reset/Makefile +++ b/drivers/vfio/platform/reset/Makefile @@ -1,5 +1,7 @@ vfio-platform-calxedaxgmac-y := vfio_platform_calxedaxgmac.o +vfio-platform-amdxgbe-y := vfio_platform_amdxgbe.o ccflags-y += -Idrivers/vfio/platform obj-$(CONFIG_VFIO_PLATFORM_CALXEDAXGMAC_RESET) += vfio-platform-calxedaxgmac.o +obj-$(CONFIG_VFIO_PLATFORM_AMDXGBE_RESET) += vfio-platform-amdxgbe.o diff --git a/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c b/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c new file mode 100644 index 0000000..bd2189b --- /dev/null +++ b/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c @@ -0,0 +1,130 @@ +/* + * VFIO platform driver specialized for AMD xgbe reset + * reset code is inherited from AMD xgbe native driver + * + * Copyright (c) 2015 Linaro Ltd. + * www.linaro.org + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include + +#include "vfio_platform_private.h" + +#define DRIVER_VERSION "0.1" +#define DRIVER_AUTHOR "Eric Auger " +#define DRIVER_DESC "Reset support for AMD xgbe vfio platform device" + +#define DMA_MR 0x3000 +#define MAC_VR 0x0110 +#define DMA_ISR 0x3008 +#define MAC_ISR 0x00b0 +#define PCS_MMD_SELECT 0xff +#define MDIO_AN_INT 0x8002 +#define MDIO_AN_INTMASK 0x8001 + +static unsigned int xmdio_read(void *ioaddr, unsigned int mmd, + unsigned int reg) +{ + unsigned int mmd_address, value; + + mmd_address = (mmd << 16) | ((reg) & 0xffff); + iowrite32(mmd_address >> 8, ioaddr + (PCS_MMD_SELECT << 2)); + value = ioread32(ioaddr + ((mmd_address & 0xff) << 2)); + return value; +} + +static void xmdio_write(void *ioaddr, unsigned int mmd, + unsigned int reg, unsigned int value) +{ + unsigned int mmd_address; + + mmd_address = (mmd << 16) | ((reg) & 0xffff); + iowrite32(mmd_address >> 8, ioaddr + (PCS_MMD_SELECT << 2)); + iowrite32(value, ioaddr + ((mmd_address & 0xff) << 2)); +} + +int vfio_platform_amdxgbe_reset(struct vfio_platform_device *vdev) +{ + struct vfio_platform_region xgmac_regs = vdev->regions[0]; + struct vfio_platform_region xpcs_regs = vdev->regions[1]; + u32 dma_mr_value, pcs_value, value; + unsigned int count; + + if (!xgmac_regs.ioaddr) { + xgmac_regs.ioaddr = + ioremap_nocache(xgmac_regs.addr, xgmac_regs.size); + if (!xgmac_regs.ioaddr) + return -ENOMEM; + } + if (!xpcs_regs.ioaddr) { + xpcs_regs.ioaddr = + ioremap_nocache(xpcs_regs.addr, xpcs_regs.size); + if (!xpcs_regs.ioaddr) + return -ENOMEM; + } + + /* reset the PHY through MDIO*/ + pcs_value = xmdio_read(xpcs_regs.ioaddr, MDIO_MMD_PCS, MDIO_CTRL1); + pcs_value |= MDIO_CTRL1_RESET; + xmdio_write(xpcs_regs.ioaddr, MDIO_MMD_PCS, MDIO_CTRL1, pcs_value); + + count = 50; + do { + msleep(20); + pcs_value = xmdio_read(xpcs_regs.ioaddr, MDIO_MMD_PCS, + MDIO_CTRL1); + } while ((pcs_value & MDIO_CTRL1_RESET) && --count); + + if (pcs_value & MDIO_CTRL1_RESET) + pr_warn("%s XGBE PHY reset timeout\n", __func__); + + /* disable auto-negotiation */ + value = xmdio_read(xpcs_regs.ioaddr, MDIO_MMD_AN, MDIO_CTRL1); + value &= ~MDIO_AN_CTRL1_ENABLE; + xmdio_write(xpcs_regs.ioaddr, MDIO_MMD_AN, MDIO_CTRL1, value); + + /* disable AN IRQ */ + xmdio_write(xpcs_regs.ioaddr, MDIO_MMD_AN, MDIO_AN_INTMASK, 0); + + /* clear AN IRQ */ + xmdio_write(xpcs_regs.ioaddr, MDIO_MMD_AN, MDIO_AN_INT, 0); + + /* MAC software reset */ + dma_mr_value = ioread32(xgmac_regs.ioaddr + DMA_MR); + dma_mr_value |= 0x1; + iowrite32(dma_mr_value, xgmac_regs.ioaddr + DMA_MR); + + usleep_range(10, 15); + + count = 2000; + while (count-- && (ioread32(xgmac_regs.ioaddr + DMA_MR) & 1)) + usleep_range(500, 600); + + if (!count) + pr_warn("%s MAC SW reset failed\n", __func__); + + return 0; +} +EXPORT_SYMBOL_GPL(vfio_platform_amdxgbe_reset); + +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c index e43efb5..f1c5889 100644 --- a/drivers/vfio/platform/vfio_platform_common.c +++ b/drivers/vfio/platform/vfio_platform_common.c @@ -31,6 +31,11 @@ static const struct vfio_platform_reset_combo reset_lookup_table[] = { .reset_function_name = "vfio_platform_calxedaxgmac_reset", .module_name = "vfio-platform-calxedaxgmac", }, + { + .compat = "amd,xgbe-seattle-v1a", + .reset_function_name = "vfio_platform_amdxgbe_reset", + .module_name = "vfio-platform-amdxgbe", + }, }; static void vfio_platform_get_reset(struct vfio_platform_device *vdev,