From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MIME_HEADER_CTYPE_ONLY, SPF_HELO_NONE,SPF_PASS,T_TVD_MIME_NO_HEADERS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DB5EC433E6 for ; Fri, 29 Jan 2021 17:30:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E013F6024A for ; Fri, 29 Jan 2021 17:30:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231335AbhA2R3S (ORCPT ); Fri, 29 Jan 2021 12:29:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232519AbhA2R0J (ORCPT ); Fri, 29 Jan 2021 12:26:09 -0500 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0FF4C061788 for ; Fri, 29 Jan 2021 09:24:51 -0800 (PST) Received: by mail-pj1-x1030.google.com with SMTP id cq1so6134948pjb.4 for ; Fri, 29 Jan 2021 09:24:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9JwHZKN7IuEP8JQcuIlNN08rrng3LGs5w6sOoVE/E+Q=; b=fZMYkrxx+esCtt7HB5VW5fxx4/G39fYPJ9hpRMASHAUbb9M+2EdAcfeQW9NUKTCvfE nPKYtNCy5faqqSrL2TOTZbzBiPy/T6JCzWPjjyFBsBDFMfFiWECy6gNT/+MLZLFcC0Em 7tUXd8m6662u2ywhbEGuNbCP1CLcAO0MMi3Z0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9JwHZKN7IuEP8JQcuIlNN08rrng3LGs5w6sOoVE/E+Q=; b=pAD1PbJ0jhEVGgZSzQ617b7tlNgSXe7ZpewISbzTpF1mAA8jezW2g+xgfVR0iumd/o 1d1RHqqDV8kFC/CjEITVN0wCiet4CwHZs+Q1sPu0ewMHZHPZ7V3lORheo+RgDzqiOmv3 AH/NjkBZ+4jh5xxvSMOwBcPvxdzS7J65LRAXzdLeWehFO8NvGwPJVLAnUgzMaVh582CY U3ByNl4yRozGlfBp3PdznwMQnO8q//3MWqm103vVJ9ndI+VS6D0RBM98xj4LzFcf+O5w D7rNlzzOCBs+RFEVIGbAuWeNjSID2Qiyewyh4xZSLHksemV6NwMeDID3ZQbONQa7DQVO v/Dw== X-Gm-Message-State: AOAM533mhWoICLSVeIwvkopsC8J9qLrZyA3tzM2lFQpQvKER6VyRcVfD Y0xMsHknxvBPTiSv1BTrproJWA== X-Google-Smtp-Source: ABdhPJw6NDJK8xRAfGxWmP5w7msd3QKMC9ZPlpS3UWjmJg+UxOkcQtIOKx6B76K4zzzDgSpi+yI9Rw== X-Received: by 2002:a17:90a:f2c6:: with SMTP id gt6mr5414892pjb.35.1611941091086; Fri, 29 Jan 2021 09:24:51 -0800 (PST) Received: from rahul_yocto_ubuntu18.ibn.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id w11sm9739016pge.28.2021.01.29.09.24.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Jan 2021 09:24:50 -0800 (PST) From: Vikas Gupta To: eric.auger@redhat.com, alex.williamson@redhat.com, cohuck@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: vikram.prakash@broadcom.com, srinath.mannam@broadcom.com, ashwin.kamath@broadcom.com, zachary.schroff@broadcom.com, manish.kurup@broadcom.com, Vikas Gupta Subject: [RFC v4 3/3] vfio: platform: reset: add msi support Date: Fri, 29 Jan 2021 22:54:21 +0530 Message-Id: <20210129172421.43299-4-vikas.gupta@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210129172421.43299-1-vikas.gupta@broadcom.com> References: <20201214174514.22006-1-vikas.gupta@broadcom.com> <20210129172421.43299-1-vikas.gupta@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000002a281605ba0d48b8" Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org --0000000000002a281605ba0d48b8 Add msi support for Broadcom FlexRm device. Signed-off-by: Vikas Gupta --- .../platform/reset/vfio_platform_bcmflexrm.c | 72 ++++++++++++++++++- 1 file changed, 70 insertions(+), 2 deletions(-) diff --git a/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c b/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c index 96064ef8f629..6ca4ca12575b 100644 --- a/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c +++ b/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c @@ -21,7 +21,9 @@ #include #include #include +#include #include +#include #include "../vfio_platform_private.h" @@ -33,6 +35,9 @@ #define RING_VER 0x000 #define RING_CONTROL 0x034 #define RING_FLUSH_DONE 0x038 +#define RING_MSI_ADDR_LS 0x03c +#define RING_MSI_ADDR_MS 0x040 +#define RING_MSI_DATA_VALUE 0x064 /* Register RING_CONTROL fields */ #define CONTROL_FLUSH_SHIFT 5 @@ -105,8 +110,71 @@ static int vfio_platform_bcmflexrm_reset(struct vfio_platform_device *vdev) return ret; } -module_vfio_reset_handler("brcm,iproc-flexrm-mbox", - vfio_platform_bcmflexrm_reset); +static u32 bcm_num_msi(struct vfio_platform_device *vdev) +{ + struct vfio_platform_region *reg = &vdev->regions[0]; + + return (reg->size / RING_REGS_SIZE); +} + +static void bcm_write_msi(struct vfio_platform_device *vdev, + struct msi_desc *desc, + struct msi_msg *msg) +{ + int i; + int hwirq = -1; + int msi_src; + void __iomem *ring; + struct vfio_platform_region *reg = &vdev->regions[0]; + + if (!reg) + return; + + for (i = 0; i < vdev->num_irqs; i++) + if (vdev->irqs[i].type == VFIO_IRQ_TYPE_MSI) + hwirq = vdev->irqs[i].ctx[0].hwirq; + + if (hwirq < 0) + return; + + msi_src = desc->irq - hwirq; + + if (!reg->ioaddr) { + reg->ioaddr = ioremap(reg->addr, reg->size); + if (!reg->ioaddr) + return; + } + + ring = reg->ioaddr + msi_src * RING_REGS_SIZE; + + writel_relaxed(msg->address_lo, ring + RING_MSI_ADDR_LS); + writel_relaxed(msg->address_hi, ring + RING_MSI_ADDR_MS); + writel_relaxed(msg->data, ring + RING_MSI_DATA_VALUE); +} + +static struct vfio_platform_reset_node vfio_platform_bcmflexrm_reset_node = { + .owner = THIS_MODULE, + .compat = "brcm,iproc-flexrm-mbox", + .of_reset = vfio_platform_bcmflexrm_reset, + .of_get_msi = bcm_num_msi, + .of_msi_write = bcm_write_msi +}; + +static int __init vfio_platform_bcmflexrm_reset_module_init(void) +{ + __vfio_platform_register_reset(&vfio_platform_bcmflexrm_reset_node); + + return 0; +} + +static void __exit vfio_platform_bcmflexrm_reset_module_exit(void) +{ + vfio_platform_unregister_reset("brcm,iproc-flexrm-mbox", + vfio_platform_bcmflexrm_reset); +} + +module_init(vfio_platform_bcmflexrm_reset_module_init); +module_exit(vfio_platform_bcmflexrm_reset_module_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Anup Patel "); -- 2.17.1 --0000000000002a281605ba0d48b8 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature 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