From patchwork Tue Jun 15 17:08:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 12322897 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=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 11AC3C48BDF for ; Tue, 15 Jun 2021 20:54:18 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B2E6D611C0 for ; Tue, 15 Jun 2021 20:54:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B2E6D611C0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=quicinc.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=q6gn0BOWbVFMFOspl8W8EObNpMxo1/euddfjV+0Ugq8=; b=F0jaJ0IWJ6K6Jl Q/1L41Y/vu4cwbAGltoo2DY8lRcDsO6/+6sQ+sKNA10SHMKcTaaM5beYodiShVbzRCn8ZDoP1bUT5 QPf6oHH+jEYd0KmEKYropncdMt5HhR8UmWj1/XjV7d0OpDFKsn4XW+YDHxVaeZcvb0blSgh9gikRt uo1swjlpOGZLEefLAcgZ2BFZJv2dnS0jxooAf2Rt4yugOV3A8IY+dYgsfGeDyFCU8w1Mm3QZ52iaE 0lsWlz1aH42D0Qvgg5aunv/A2faze2eFREDQn0oz690YpWKyvRtvcp0/BYgBZuJpGAt52gj50KNqc T3XjWpK9sANWVXao1aiA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltG38-002vQe-B0; Tue, 15 Jun 2021 20:52:42 +0000 Received: from alexa-out-sd-01.qualcomm.com ([199.106.114.38]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltCZ0-001bWE-1A for linux-arm-kernel@lists.infradead.org; Tue, 15 Jun 2021 17:09:23 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1623776961; x=1655312961; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=D6IUBGYQqCLcl7dcGiUkl6UUi4wbJwdxmuWA7BYn2qc=; b=KnESMV3ri9zKCmpYkzp2t3i2ohWqs5R6ZVB+GltgaKz51PFly2mljpb+ +VlFeKm0WDan+JCzZJyQdqdwQ25ZxqcL6h5qZwUUtO5IG/ovmnxPkKRFG FL2idGIfl0IjCAlpAuNt/1MWZ+/ukssXQBTvdPM2F+/34ssTqAwSi7mzf 4=; Received: from unknown (HELO ironmsg02-sd.qualcomm.com) ([10.53.140.142]) by alexa-out-sd-01.qualcomm.com with ESMTP; 15 Jun 2021 10:08:50 -0700 X-QCInternal: smtphost Received: from nasanexm03e.na.qualcomm.com ([10.85.0.48]) by ironmsg02-sd.qualcomm.com with ESMTP/TLS/AES256-SHA; 15 Jun 2021 10:08:50 -0700 Received: from th-lint-040.qualcomm.com (10.80.80.8) by nasanexm03e.na.qualcomm.com (10.85.0.48) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Tue, 15 Jun 2021 10:08:50 -0700 From: Georgi Djakov To: , CC: , , , , , , , Subject: [PATCH v6 04/15] iommu: Add a map_pages() op for IOMMU drivers Date: Tue, 15 Jun 2021 10:08:22 -0700 Message-ID: <1623776913-390160-5-git-send-email-quic_c_gdjako@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1623776913-390160-1-git-send-email-quic_c_gdjako@quicinc.com> References: <1623776913-390160-1-git-send-email-quic_c_gdjako@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanexm03e.na.qualcomm.com (10.85.0.48) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210615_100922_154009_E5C15D32 X-CRM114-Status: GOOD ( 12.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Isaac J. Manjarres" Add a callback for IOMMU drivers to provide a path for the IOMMU framework to call into an IOMMU driver, which can call into the io-pgtable code, to map a physically contiguous rnage of pages of the same size. For IOMMU drivers that do not specify a map_pages() callback, the existing logic of mapping memory one page block at a time will be used. Signed-off-by: Isaac J. Manjarres Suggested-by: Will Deacon Acked-by: Lu Baolu Signed-off-by: Georgi Djakov --- include/linux/iommu.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 25a844121be5..d7989d4a7404 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -180,6 +180,8 @@ struct iommu_iotlb_gather { * @attach_dev: attach device to an iommu domain * @detach_dev: detach device from an iommu domain * @map: map a physically contiguous memory region to an iommu domain + * @map_pages: map a physically contiguous set of pages of the same size to + * an iommu domain. * @unmap: unmap a physically contiguous memory region from an iommu domain * @unmap_pages: unmap a number of pages of the same size from an iommu domain * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain @@ -230,6 +232,9 @@ struct iommu_ops { void (*detach_dev)(struct iommu_domain *domain, struct device *dev); int (*map)(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot, gfp_t gfp); + int (*map_pages)(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t pgsize, size_t pgcount, + int prot, gfp_t gfp, size_t *mapped); size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, size_t size, struct iommu_iotlb_gather *iotlb_gather); size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova,