From patchwork Fri Oct 6 14:04:48 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 9989563 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 70F5F6029B for ; Fri, 6 Oct 2017 14:08:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5162728D9D for ; Fri, 6 Oct 2017 14:08:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4656F28DB1; Fri, 6 Oct 2017 14:08:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E425428D9D for ; Fri, 6 Oct 2017 14:08:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uL4fJWapATamHoNfr7SqIwvdF1NQkooRuRM7BYZ2P6E=; b=igHx/qRLvNwUav iawMUf5UbqFXNST7RC62HSXAYAQxakCO6UecVSE3/ofVBPZ+oXp97w84UMASqHV3TlwiHwW+g95+1 m/38h9rVUWwElHxd8p/2U/Ra/wIbSMIYdPqF6GCVgCI9OoHFNIBP0LSPBPQi3QQQGQp2FgXan4htu 6JbsFSuNbpvHh9ZmY0Dt5VYCVeoGR7THTotwoGdVZotWFK4lfvRl2DW+Xib+5U6/qKLABrAhnZokh f0rdtpMJ+MIE99bCIU/mxK7374bSPFyi2aZ1r7tBsrhwbgduZklgUYCpu7Bzci3Jh5uKsIibBFyc2 TfsltsznGrUj2dl2xLlA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1e0TIv-0006nS-Fb; Fri, 06 Oct 2017 14:08:41 +0000 Received: from szxga04-in.huawei.com ([45.249.212.190]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1e0TIa-0006VA-Al for linux-arm-kernel@lists.infradead.org; Fri, 06 Oct 2017 14:08:23 +0000 Received: from 172.30.72.58 (EHLO DGGEMS403-HUB.china.huawei.com) ([172.30.72.58]) by dggrg04-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id DIO33388; Fri, 06 Oct 2017 22:07:53 +0800 (CST) Received: from S00345302A-PC.china.huawei.com (10.202.227.237) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.301.0; Fri, 6 Oct 2017 22:07:26 +0800 From: Shameer Kolothum To: , , , , , , , Subject: [PATCH v9 2/4] iommu/dma: Add a helper function to reserve HW MSI address regions for IOMMU drivers Date: Fri, 6 Oct 2017 15:04:48 +0100 Message-ID: <20171006140450.89652-3-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20171006140450.89652-1-shameerali.kolothum.thodi@huawei.com> References: <20171006140450.89652-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.202.227.237] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090201.59D78E39.0312, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: ccee44145571a8a2311c8cc4b0d93011 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171006_070820_715038_7B8B0372 X-CRM114-Status: GOOD ( 10.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-pci@vger.kernel.org, john.garry@huawei.com, linuxarm@huawei.com, Shameer Kolothum , linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, wangzhou1@hisilicon.com, guohanjun@huawei.com, linux-arm-kernel@lists.infradead.org, devel@acpica.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP IOMMU drivers can use this to implement their .get_resv_regions callback for HW MSI specific reservations(e.g. ARM GICv3 ITS MSI region). Signed-off-by: Shameer Kolothum --- drivers/iommu/dma-iommu.c | 20 ++++++++++++++++++++ include/linux/dma-iommu.h | 7 +++++++ 2 files changed, 27 insertions(+) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 9d1cebe..bae677e 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -19,6 +19,7 @@ * along with this program. If not, see . */ +#include #include #include #include @@ -27,6 +28,7 @@ #include #include #include +#include #include #include #include @@ -198,6 +200,24 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) } EXPORT_SYMBOL(iommu_dma_get_resv_regions); +/** + * iommu_dma_get_msi_resv_regions - Reserved region driver helper + * @dev: Device from iommu_get_resv_regions() + * @list: Reserved region list from iommu_get_resv_regions() + * + * IOMMU drivers can use this to implement their .get_resv_regions + * callback for HW MSI specific reservations. For now, this only + * covers ITS MSI region reservation using ACPI IORT helper function. + */ +int iommu_dma_get_msi_resv_regions(struct device *dev, struct list_head *list) +{ + if (!is_of_node(dev->iommu_fwspec->iommu_fwnode)) + return iort_iommu_msi_get_resv_regions(dev, list); + + return -ENODEV; +} +EXPORT_SYMBOL(iommu_dma_get_msi_resv_regions); + static int cookie_init_hw_msi_region(struct iommu_dma_cookie *cookie, phys_addr_t start, phys_addr_t end) { diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h index 92f2083..6062ef0 100644 --- a/include/linux/dma-iommu.h +++ b/include/linux/dma-iommu.h @@ -74,6 +74,8 @@ void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle, void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg); void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list); +int iommu_dma_get_msi_resv_regions(struct device *dev, struct list_head *list); + #else struct iommu_domain; @@ -107,6 +109,11 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he { } +static inline int iommu_dma_get_msi_resv_regions(struct device *dev, struct list_head *list) +{ + return -ENODEV; +} + #endif /* CONFIG_IOMMU_DMA */ #endif /* __KERNEL__ */ #endif /* __DMA_IOMMU_H */