From patchwork Thu Feb 17 11:34:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 12749945 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B88E8C433F5 for ; Thu, 17 Feb 2022 12:04:35 +0000 (UTC) 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=oNL4pWvtKGdwEdySOcI9OU7rue3Etu7eO+ByiPFD9tQ=; b=vRpWk+Iy/Fhn0w 3kD2z++V7I8wHTVKYKuAcxd5McKPoY59uNmWgdiGz0jAbAPl4ASJ2zfa2PNcMvoAVUt37+cCeNQul TNT1T10wqTOdt9qbdBb5vUtSv9WwJaMyhdNuZtRzN6QJziu4KNBuWqbA0zWDUP0UEPQ+lR922xRcg PAdoDTYOl+ruXlPWIpOyvw/XiskkkpBfdm0fsVLBdQHtU32j0fJwbTj3JUYy3bfMfSVg1d4kU2+Oo lyBIhqEfqUBdSo/KSnJlXABaKJbphE2GzUJ5P080D5k4gAm06EXsEVn0GqWLGrdDO44QBcnyT1PjS d+LsKX/AaeIwpbSWUVJA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nKfV2-00AIaa-GI; Thu, 17 Feb 2022 12:03:05 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nKfFW-00AAdz-Qm; Thu, 17 Feb 2022 11:47:04 +0000 X-UUID: 454a3eee6b634eec8f2ef4c73d6ba381-20220217 X-UUID: 454a3eee6b634eec8f2ef4c73d6ba381-20220217 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 125530899; Thu, 17 Feb 2022 04:46:58 -0700 Received: from mtkmbs10n1.mediatek.inc (172.21.101.34) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 17 Feb 2022 03:40:24 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Thu, 17 Feb 2022 19:40:22 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 17 Feb 2022 19:40:21 +0800 From: Yong Wu To: Joerg Roedel , Rob Herring , Matthias Brugger , Will Deacon CC: Robin Murphy , Krzysztof Kozlowski , Tomasz Figa , , , , , , , Hsin-Yi Wang , , , , , , "AngeloGioacchino Del Regno" , , , , Subject: [PATCH v5 32/34] iommu/mediatek: Initialise/Remove for multi bank dev Date: Thu, 17 Feb 2022 19:34:51 +0800 Message-ID: <20220217113453.13658-33-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220217113453.13658-1-yong.wu@mediatek.com> References: <20220217113453.13658-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220217_034702_910298_8FE61A71 X-CRM114-Status: GOOD ( 18.04 ) 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 The registers for each bank of the IOMMU base are in order, delta is 0x1000. Initialise the base for each bank. For all the previous SoC, we only have bank0. thus use "do {} while()" to allow bank0 always go. When removing the device, Not always all the banks are initialised, it depend on if there is masters for that bank. Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 44 ++++++++++++++++++++++++++------------- 1 file changed, 30 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 46d3a8d3fa36..2e7ed4a2d6e1 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -113,6 +113,7 @@ #define F_MMU_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f) #define MTK_PROTECT_PA_ALIGN 256 +#define MTK_IOMMU_BANK_SZ 0x1000 #define PERICFG_IOMMU_1 0x714 @@ -1113,7 +1114,7 @@ static int mtk_iommu_probe(struct platform_device *pdev) struct component_match *match = NULL; struct regmap *infracfg; void *protect; - int ret, banks_num; + int ret, banks_num, i = 0; u32 val; char *p; struct mtk_iommu_bank_data *bank; @@ -1154,27 +1155,36 @@ static int mtk_iommu_probe(struct platform_device *pdev) data->enable_4GB = !!(val & F_DDR_4GB_SUPPORT_EN); } + banks_num = data->plat_data->banks_num; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (resource_size(res) < banks_num * MTK_IOMMU_BANK_SZ) { + dev_err(dev, "banknr %d. res %pR is not enough.\n", banks_num, res); + return -EINVAL; + } base = devm_ioremap_resource(dev, res); if (IS_ERR(base)) return PTR_ERR(base); ioaddr = res->start; - banks_num = data->plat_data->banks_num; data->bank = devm_kmalloc(dev, banks_num * sizeof(*data->bank), GFP_KERNEL); if (!data->bank) return -ENOMEM; - bank = &data->bank[0]; - bank->id = 0; - bank->base = base; - bank->m4u_dom = NULL; - bank->irq = platform_get_irq(pdev, 0); - if (bank->irq < 0) - return bank->irq; - bank->parent_dev = dev; - bank->parent_data = data; - spin_lock_init(&bank->tlb_lock); + do { + if (!data->plat_data->banks_enable[i]) + continue; + bank = &data->bank[i]; + bank->id = i; + bank->base = base + i * MTK_IOMMU_BANK_SZ; + bank->m4u_dom = NULL; + + bank->irq = platform_get_irq(pdev, i); + if (bank->irq < 0) + return bank->irq; + bank->parent_dev = dev; + bank->parent_data = data; + spin_lock_init(&bank->tlb_lock); + } while (++i < banks_num); if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) { data->bclk = devm_clk_get(dev, "bclk"); @@ -1260,7 +1270,8 @@ static int mtk_iommu_probe(struct platform_device *pdev) static int mtk_iommu_remove(struct platform_device *pdev) { struct mtk_iommu_data *data = platform_get_drvdata(pdev); - struct mtk_iommu_bank_data *bank = &data->bank[0]; + struct mtk_iommu_bank_data *bank; + int i; iommu_device_sysfs_remove(&data->iommu); iommu_device_unregister(&data->iommu); @@ -1277,7 +1288,12 @@ static int mtk_iommu_remove(struct platform_device *pdev) #endif } pm_runtime_disable(&pdev->dev); - devm_free_irq(&pdev->dev, bank->irq, bank); + for (i = 0; i < data->plat_data->banks_num; i++) { + bank = &data->bank[i]; + if (!bank->m4u_dom) + continue; + devm_free_irq(&pdev->dev, bank->irq, bank); + } return 0; }