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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 98BC6C49EAB for ; Sat, 26 Jun 2021 11:02:20 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 5868561490 for ; Sat, 26 Jun 2021 11:02:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5868561490 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id E1756403B2; Sat, 26 Jun 2021 11:02:19 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cmRuMv7LouaI; Sat, 26 Jun 2021 11:02:18 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp4.osuosl.org (Postfix) with ESMTPS id 807CD403F3; Sat, 26 Jun 2021 11:02:18 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 900EBC0027; Sat, 26 Jun 2021 11:02:17 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8EA03C001C for ; Sat, 26 Jun 2021 11:02:15 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 5DFED83657 for ; Sat, 26 Jun 2021 11:02:15 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id epHme67dJPFq for ; Sat, 26 Jun 2021 11:02:14 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by smtp1.osuosl.org (Postfix) with ESMTPS id 0854B81065 for ; Sat, 26 Jun 2021 11:02:13 +0000 (UTC) Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4GBrRD0vwTzXlKy; Sat, 26 Jun 2021 18:56:56 +0800 (CST) Received: from dggpemm500006.china.huawei.com (7.185.36.236) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Sat, 26 Jun 2021 19:02:10 +0800 Received: from thunder-town.china.huawei.com (10.174.179.0) by dggpemm500006.china.huawei.com (7.185.36.236) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Sat, 26 Jun 2021 19:02:09 +0800 From: Zhen Lei To: Will Deacon , Robin Murphy , "Joerg Roedel" , linux-arm-kernel , iommu , linux-kernel Subject: [PATCH RFC 3/8] iommu/arm-smmu-v3: Add and use static helper function arm_smmu_get_cmdq() Date: Sat, 26 Jun 2021 19:01:25 +0800 Message-ID: <20210626110130.2416-4-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20210626110130.2416-1-thunder.leizhen@huawei.com> References: <20210626110130.2416-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.179.0] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500006.china.huawei.com (7.185.36.236) X-CFilter-Loop: Reflected X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" One SMMU has only one normal CMDQ. Therefore, this CMDQ is used regardless of the core on which the command is inserted. It can be referenced directly through "smmu->cmdq". However, one SMMU has multiple ECMDQs, and the ECMDQ used by the core on which the command insertion is executed may be different. So the helper function arm_smmu_get_cmdq() is added, which returns the CMDQ/ECMDQ that the current core should use. Currently, the code that supports ECMDQ is not added. just simply returns "&smmu->cmdq". Many subfunctions of arm_smmu_cmdq_issue_cmdlist() use "&smmu->cmdq" or "&smmu->cmdq.q" directly. To support ECMDQ, they need to call the newly added function arm_smmu_get_cmdq() instead. Note that normal CMDQ is still required until ECMDQ is available. Signed-off-by: Zhen Lei --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 22 ++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index a5361153ca1d6a4..e4af13b1e7fc015 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -335,10 +335,14 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent) return 0; } +static struct arm_smmu_cmdq *arm_smmu_get_cmdq(struct arm_smmu_device *smmu) +{ + return &smmu->cmdq; +} + static void arm_smmu_cmdq_build_sync_cmd(u64 *cmd, struct arm_smmu_device *smmu, - u32 prod) + struct arm_smmu_queue *q, u32 prod) { - struct arm_smmu_queue *q = &smmu->cmdq.q; struct arm_smmu_cmdq_ent ent = { .opcode = CMDQ_OP_CMD_SYNC, }; @@ -578,7 +582,7 @@ static int arm_smmu_cmdq_poll_until_not_full(struct arm_smmu_device *smmu, { unsigned long flags; struct arm_smmu_queue_poll qp; - struct arm_smmu_cmdq *cmdq = &smmu->cmdq; + struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu); int ret = 0; /* @@ -594,7 +598,7 @@ static int arm_smmu_cmdq_poll_until_not_full(struct arm_smmu_device *smmu, queue_poll_init(smmu, &qp); do { - llq->val = READ_ONCE(smmu->cmdq.q.llq.val); + llq->val = READ_ONCE(cmdq->q.llq.val); if (!queue_full(llq)) break; @@ -613,7 +617,7 @@ static int __arm_smmu_cmdq_poll_until_msi(struct arm_smmu_device *smmu, { int ret = 0; struct arm_smmu_queue_poll qp; - struct arm_smmu_cmdq *cmdq = &smmu->cmdq; + struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu); u32 *cmd = (u32 *)(Q_ENT(&cmdq->q, llq->prod)); queue_poll_init(smmu, &qp); @@ -636,12 +640,12 @@ static int __arm_smmu_cmdq_poll_until_consumed(struct arm_smmu_device *smmu, struct arm_smmu_ll_queue *llq) { struct arm_smmu_queue_poll qp; - struct arm_smmu_cmdq *cmdq = &smmu->cmdq; + struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu); u32 prod = llq->prod; int ret = 0; queue_poll_init(smmu, &qp); - llq->val = READ_ONCE(smmu->cmdq.q.llq.val); + llq->val = READ_ONCE(cmdq->q.llq.val); do { if (queue_consumed(llq, prod)) break; @@ -731,7 +735,7 @@ static int arm_smmu_cmdq_issue_cmdlist(struct arm_smmu_device *smmu, u32 prod; unsigned long flags; bool owner; - struct arm_smmu_cmdq *cmdq = &smmu->cmdq; + struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu); struct arm_smmu_ll_queue llq = { .max_n_shift = cmdq->q.llq.max_n_shift, }, head = llq; @@ -771,7 +775,7 @@ static int arm_smmu_cmdq_issue_cmdlist(struct arm_smmu_device *smmu, arm_smmu_cmdq_write_entries(cmdq, cmds, llq.prod, n); if (sync) { prod = queue_inc_prod_n(&llq, n); - arm_smmu_cmdq_build_sync_cmd(cmd_sync, smmu, prod); + arm_smmu_cmdq_build_sync_cmd(cmd_sync, smmu, &cmdq->q, prod); queue_write(Q_ENT(&cmdq->q, prod), cmd_sync, CMDQ_ENT_DWORDS); /* -- 2.26.0.106.g9fadedd _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu